JPH05199809A - Speed controllable lawn mower - Google Patents

Abstract

PURPOSE:To clean whole reaping face with intermittent plural rear blades by controlling phases in rotation of substrates equipped with rear blades and installing the controlled substrates in a weeding rotator. CONSTITUTION:A substrate 2 with a rear blade having a rear blade provided between plural projections forming a front blade 4 is fixed to a supporting shaft 24 of a weeding rotator 10. Rotation phase of either one rear blade of two sheets of substrates equipped with rear blades coincides with that of a projection of the other substrate equipped with rear blade and rotational face of substrate equipped with the rear blade in the outer periphery of the rotator is nearly cleaned without leaving space between them.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a sharp back blade at a shallow position between a plurality of protrusions arranged in parallel, and mows only weeds softer than the lawn near the ground surface in a required rotation to reduce work time. Continuity is ensured, and due to the simultaneous exchange structure of multiple double-edged boards, maintenance, changes in work contents, and speedy repairs allow weeds to grow in the relatively flat lawns of golf courses and gardens. It is a technology to prevent pesticide pollution from cutting and spraying herbicide, leaving the lawn selectively.

[0002]

2. Description of the Related Art Conventionally, as a device for selectively mowing soft weeds in a lawn without cutting the lawn, the Japanese Patent Application No. 28-1982
No. 5903 Name of invention Mower in lawn and international application number P
CT / JP, 89/01206 Title of Invention Metallic substrate for weeding and weeding tool There was a proposal by Masaru Tsuda. However, the work speed is set so that the lawn is not cut, so if the work rotation is performed only in the same direction, rarely cut grass pieces or fragments of hard epidermis among weeds will stick to the cutting blade. , The phenomenon of cutting weeds occurs, and on the other hand, the lawn is not repelled or slips even if it hits the grass on the front edge, grass, etc.
The stickiness tends to increase with time, and the entanglement further increases, and there is no choice but to interrupt the work and perform weeding work on the weeding substrate or the weeding rotary member, or to provide a weeding tool. There are lawn mowers and mowers as similar devices, but since they do not have the function of selectively cutting grass that is softer than lawn, they are not the same kind of device, but in brief, weeding multiple grass cutting boards. There was no specific proposal for removing or removing the entangled grass during the mowing rotation, such as attaching and detaching from the rotating body at the same time. Because the grass is usually the thinnest and most flexible of the grass, but the epidermis is hard and difficult to cut, so when we hit the high-speed cutting blade directly, weeds and grass that have already stuck to the leading edge of the blade are pushed by themselves, This is because the action of cutting or scraping occurs before itself, and since the action continues during the work rotation, sticking and entanglement can be ignored during the sharp practical use of the cutting blade. As an example somewhat similar to the blade type of the weeding substrate used in the present invention, a hedge trimmer is mainly used for pruning a tree, and a small one is used for mowing a small area. The method of use is to fix the lower part of the upper and lower two mowing plates and repeat the reciprocating motion only at the upper part at right angles to the direction of movement of the mowing plate, but form both sides of the inner and inner sides of the protruding piece as side blades The foliage that has entered between the protrusions is cut by the side blades of the upper and lower grass cutting plates, and the back blade facing the traveling direction does not cut the foliage alone. or,
In the direction of movement, it is just a speed to shake by hand to the left and right, so it does not apply a cutting force to the foliage at a considerable speed in front of the back blade at a speed of 4 rice per second or more. For example, it is not possible to selectively mow only weeds that are softer than the lawn in the lawn, even if the hedge trimmer is driven at high speed or low speed.
That is, the device of PCT / JP, 89/01206 and the lawn mower in the adjustable lawn of the present invention are functional, action, effect, purpose, etc. in comparison with any other mowers, lawn mowers and hedge trimmers. However, there is no overall commonality.

[0003]

The problems to be solved are to clarify the depth of the back blade for removing weeds in the lawn, to perform weeding and weeding simultaneously, and to remove the weeding substrate. Clarifying the setting range of the required work speed depending on the season, humidity, length of lawn, etc., and by making the same function in both front and back directions, it is advantageous in automation and it is a forming method that keeps the depth of the back blade constant even when polishing is there.

[0004]

According to the present invention, the depth of the inner blade is set to be about 50% or more and about 200% or less of the depth between the protruding pieces, and the front blade is directed upward and the inner blade is directed downward. None, two-step blades are provided on the front and rear edges of the weeding substrate, and the prime mover is placed above the weeding rotary body to maintain the balance with grass collection in both front and rear directions.
The weeding work and the weeding are simultaneously performed by both forward and reverse rotations, and the weeding work speed of the weeding substrate is set to an appropriate value in the range of 4 to 13 rice per second, or is settable. More specifically, a plurality of projecting pieces formed by using a plate material for a blade such as a steel plate or a stainless steel plate mainly as a raw material in parallel and having front edges substantially facing each other in the traveling direction and forming a front blade with a predetermined width. When,
Even if it is narrow between the protrusions, it is sharper than the front blade at a width that is mainly larger than the thickness of the roots to be mowed, and at a shallow position that does not focus the lawn forward, and at least deeper than half of the interval between the protrusions. In addition to connecting to a prime mover provided on a vehicle body that rotatably supports a weeding rotary body provided with a plurality of two-step blade substrates provided with opposite back blades facing each other in the traveling direction,
Basically, a lawn mower is constructed in which the support shaft of the weeding rotary member can be adjusted to a predetermined height above the ground. In the present invention, in order to achieve a higher working speed in a place where there is almost no large solid matter, the purpose of cutting weeds that are extremely soft even with a front blade and earthmoving is also sought.
Therefore, the front edges of the multiple protrusions are formed to be a strong front blade, the rear blade is sharper than the front blade, and the lawn foliage is formed at a shallow position in front of the rear blade between the protrusions so that it does not bundle up. Although it is easy to mow it by touching the back blade directly to the weeds, if it is too shallow, the effect of untangling the lawn will be reduced, it will be easily damaged, and inconveniences such as the fact that the thick target stem cannot be floated will occur. ,
It is preferable to provide it at a depth of about the distance between the protrusions. This is because most of the solid objects larger than the interval between the protruding pieces do not directly hit or damage the inner blade located deeper than the radius. In addition, if the front blade is formed upward and the back blade is formed downward, the front edge of the back blade is retreated by polishing only the lower surface of the back blade that has become shallow due to the front blade being worn and shortened. Can get back. With this double-edged board, the lawn is flexible and the skin is hard, so the grass in front of the front blade is pushed down without being cut, and the grass in front of the adjacent back blade is disentangled and the grass in front of the back blade is It is easier to touch the inner blade, and weeds such as thick and hard stalks and broad leaves are caught between the protrusions, and the raised one has a two-step blade that follows the exposed root afterwards. Mowed by the board. In addition, since the front blade of this two-step blade repels a solid object that is larger than the space between the protrusions, it protects the back blade, and even if it digs into the soil in a shallow layer, it does not damage the back blade and cleans the soil. You can also expect the action of earthmoving. It is necessary to adjust the height of these double-edged boards according to the length of the lawn, the type of weed, and the degree of growth. In the present invention, the cutting height of the two-step blade substrate is adjusted by adjusting the height of the support shaft of the weeding rotary body above the ground, rather than the weeding rotary body. The height of the support for supporting the body can be provided on the carriage so as to be adjustable, but since the structure becomes complicated, it is preferable to make the height of the wheels of the chassis adjustable.
In addition, it is desirable to be able to adjust the cutting speed of the board with two-step blades according to the hardness of lawns and weeds and the sharpness of cutting blades depending on the season. If the above-mentioned two-step bladed substrate is provided in the weeding rotary member in a multiple of 2, the position of one of the adjacent two protruding pieces of those substrates at the time of rotation of the other back blade can be set. If the width of the back blade is wider than the width of the front blade if it is provided in the weeding rotary body in line with the position, the sharp back blade with no gap will expose the predetermined ground height, and there will be no uncut residue. However, it is desirable to attach it so that the entire cutting surface can be exposed with the back blade in this way. When the above-mentioned two-step blade is formed only on the front edge of the substrate, the blade is always operated in the normal rotation state, and the main action is to selectively cut grass in the lawn. However, if a double-edged blade is also formed on the trailing edge, the same work can be performed by reversing, and the trailing edge of the rotating grass sticks to the back blade when rotating in either forward or reverse operation. The effect is to be rubbed on the grass so that it is removed from the opposite direction. As described above, in a device that rotates in both forward and reverse directions, the work may be performed by changing the front and rear of the vehicle body, and the collection of the object is in two front and back directions. If a space is provided, a grass cutter is provided at the bottom of the space, a prime mover is provided at the top, and grass gathering tools communicating with the space are provided at the front and rear, then the grass gathers in the grass gathering tool in the direction opposite to the direction of rotation. , Continuous work is easy, and if these grass collecting tools are detachably constructed and attached, the cutting grass can be quickly processed, cleaning is easy, and both the action of weeding and mowing in the lawn can be obtained during operation. Furthermore, we have realized the automation of the wheels, or the connection to a car, so that weeds in the lawn can be mowed by remote control.
Also, although motors are cited as prime movers, it is obvious that other prime movers may be used, for example internal combustion engines.

[0005]

1 to 6, a plate material for a blade such as a steel plate or a stainless steel plate is mainly used as a material, and the front blades 4 are arranged in parallel and have a predetermined width such that the front edges are substantially opposed to each other in the traveling direction. A plurality of projecting pieces 3 formed with a plurality of the projecting pieces 3 and a width between the projecting pieces 3 which is narrower than the thickness of the roots to be mowed, but about 50% or more of the dimension between the projecting pieces (3). The deepest part of the sharp back blade 5 is provided at a depth of 200% or less and
Are formed to face each other in the traveling direction. In FIGS. 1 and 2, the front edge of the projecting piece has an arc shape in which the front edge is slightly retracted, and the substrate is curved inward. Further, the front blade is formed upward and the back blade is formed downward. In FIGS. 3 and 4, a mounting plate 6 is provided on a substrate bent at the center, and a support shaft 24 of the weeding rotor 10 is provided through the mounting plate 6.
It is fixed integrally with the support tool 23 provided in the above, but the rotation phase of the projecting piece of one of the two double-edged boards and the protruding piece of the other double-edged board is matched (see FIG. 5). (See α and β in the middle), and the rear edge of the substrate with two-step blades is arranged so as to expose the rotating surface of the substrate with two-step blades on the outer periphery of the rotating body with almost no gap. If it is formed as a curved surface subordinate to the broken line of a small circle and attached as shown in the figure, when it is rotated in the direction of the arrow, it does not collide elastically and slightly with the weeding tool. As an example of the above-mentioned substrate 2 with two-step blades, when the back blade and the protruding piece width are formed to 6 mm and the deepest portion of the back blade is formed to a depth of 5 mm, when weeding mainly clover It is desirable that the weeding substrate provided on the outer periphery of the weeding rotary member is variable in a speed of 4 to 13 US / s and can be reversed. If the speed is 7 to 8 rice per second, it is a new and relatively sharp blade, even during late autumn when the epidermis of the lawn is relatively hard.
You can mow the lawn about 15 cm long without damaging the lawn. Therefore, if the lawn is about 5 cm, it is easier to be repelled, and even if the working speed of the weeding substrate is set within the range of 10 to 13 rice per second, weeding may be possible without causing fatal damage to the lawn. However, in the spring, the surface of the lawn is soft, and the lawn may be damaged unless the speed is reduced to about 4 to 7 rice per second. Therefore, since it is a complex and uncalculable factor such as blade sharpness, season, lawn type, length, atmospheric and lawn humidity, moisture content, etc., it should be possible to adjust to the most suitable working speed on site. is important. A lawn mower provided with the above-mentioned board with two-step blades will be described with reference to the drawings. The lawn mower 1 for both front and rear speed control type lawn mowers is provided with side plates 39 on both sides of which peripheral edges are bent at a constant width to form a peripheral edge. The weeding rotator 10 and then the front and rear wheels 37 are provided again. The support shaft 24 of the weeding rotator 10 penetrates the side plate 39 and has the large pulley 21 fitted on the outer side thereof. The shaft end of the motor I3 inside penetrates through the side plate and projects, the small pulley 22 is fitted, and the large and small pulleys are connected by the belt 20 (FIG. 10). Further, directly below the large pulley 21, the handle 12 supports the lower end of the handle 11 so as to be rotatable by a predetermined angle, but if the handle is rotated in the opposite direction, it will be at the position indicated by the chain double-dashed line. , It can be held and it can reverse (Fig. 10).
The weeding substrate is provided with two-stage blades on both front and rear edges. Furthermore,
Between the side plates, a shelf 36 is provided up to the end except for the central part in the middle stage, and in the central part, below the motor partition 38,
The rotating parts of the wind cutting tool 16 are attached to the upper surfaces of both inner end portions of the shelf, and the wind cutting tool 16 is provided on the upper part of the weeding tool 25 provided at the center.
The rotating end edge portion of is supported. Therefore, when the wind cutting tool 16 is rotated upward by the rotating wind force of the weeding rotor 10, the wind cutting tool 16 on the opposite side has a negative pressure on the lower side, and the wind pressure is applied downward on the grass. It is pressed against the upper surface of the paying tool 25 (Figs. 9, 10). Further, the two-stage blade rotates on the same circumference both front and rear. Thus, if the weeding rotary body 10 rotates in the direction of the large arrow, the wind cutting tool 16 pushed from below by the wind force.
Rotates upward and is pressed against the lower part of the motor partition 38,
The grass is blown off by wind force above the wind cutting tool 16 on the opposite side, and jumps into the grass collecting tool in the direction of the small arrow. At this time, if the handle 11 is pushed in the direction of the arrow, the grass in the lawn can be cut, and at the same time, the two-step blade at the trailing edge is weeded by the lawn. Further, if the weeding rotary body is used for the reverse rotation, the vehicle body can also be moved in the opposite direction to perform the grass cutting work, but the two-step blade on the opposite side of the weeding board will perform the grass cutting. Even in this reverse work, the two-step blade rotates on the same circumference of the front and rear, and the motor position is in the center, so the balance is good. The weeding tool 25 described above has an arc-shaped cross section, and spring stands 42 are fixed to the upper portions of both side ends, and a slide case 41 provided on the inner walls of both side plates.
The fixed part of the spring stand 42 is inserted into
The recoil spring 40 pushes the lower end elastically from above (FIGS. 10 and 11). Therefore, the weeding tool 25 is elastically in contact with the two-step bladed substrate 2. (9th, 10th, 11th
Figure). In the lawnmower 1 in the lawn of this example, both ends of the axle 32 are fixed below the left and right adjusters 26 made of a metal plate in order to adjust the cutting height by the front and rear wheels 37. An adjusting shaft 31 penetrates below the end, and one end is fixed to the inner wall of the side plate 39. Then, the adjusting tool 26
The slide groove 30 is opened upward from the central portion of the, and when the locking tool 29 configured to be slidable along the slide groove 30 is located at the uppermost portion (see FIG. 13), adjustment is performed. The tool 26 is rotatable about the adjustment shaft 31 from the upper end to the lower end about the adjustment shaft 31. To move the adjustment tool 26 to an appropriate position, for example, from the middle stage (FIG. 12) to the uppermost stage,
The locking tool 29 may be slid upward and the adjusting tool 26 may be rotated above the locking groove 28 so that the adjusting tool 26 is slid downward in accordance with the uppermost locking groove 28 of the three steps (the first step). 14
Figure). At this time, the front and rear wheels 37 are lifted higher by the amount of pulling up the axle 32, and the height is set at that position. Since the adjusting tool 26 can be fixed to any of the three locking grooves 28 by the above-described operation,
The mowing height of the mowing machine in the lawn of this example can be set in three stages. In addition, it is preferable to apply a return pressure downward to the locking tool via an elastic body because it is easy to operate. The slide type adjusting device of the above-mentioned example has a simple structure and can be applied to the operation of a single wheel, and it is also preferable that a pipe is used as a locking tool so that the adjusting tool is penetrated.

[0006]

As described above, in the lawn mower in the speed-controlled lawn of the present invention, the depth of the back blade of the two-step bladed substrate is set within the range of 50 to 200% of the dimension between the projecting pieces. Since the back blade is hard to damage with a solid object, the thick weed stalk is hooked between the protrusions to float the root, and the protrusion disentangles the lawn and makes it easy for the weeds to touch the back blade directly. Therefore, weeding can be done smoothly and sufficiently, and if the front blade is formed upward and the rear blade is formed downward,
In addition to sharpening the front and back blades only by polishing the lower surface, the depth position of the back blade can be adjusted to some extent. Further, since the two-step blades are formed on both front and rear edges of the weeding substrate and can be operated in both forward and reverse rotations, the two-step blades on the leading edge side can obtain weeding and the two-step blades on the trailing edge side can obtain weeding effect. Furthermore, if a motor is placed above the center of the weeding rotor, the functions in both front and rear directions can be made the same, so weeding can be done regardless of the front or back even if it is connected to the car or it is self-propelled. If the work speed of the board with two-step blades can be set to an appropriate value, the desired work speed can be selected according to the work environment such as season, growth rate, dryness and humidity. The weeding work can be carried out promptly, sufficiently and smoothly.

[Brief description of drawings]

FIG. 1 is a partial plan view of a preferred example of a substrate with two-step blades,

2 is a cross-sectional view taken along one-dot chain line a -.- a 'in FIG. 1,

FIG. 3 is a plan view in which a mounting plate is fixed to a preferred example of a double-edged board,

4 is a cross-sectional view taken along alternate long and short dash line b -.- b 'in FIG. 3,

FIG. 5 is a front view of an example of a weeding rotary member,

6 is a side view of the weeding rotor of FIG. 4,

FIG. 7 is a reduced front view of an example of a front-rear type of a mower in a lawn,

8 is a side view of the example of FIG. 7,

9 is an enlarged view of the main body part of FIG. 7,

[10th] The perspective view of FIG.

11 is a perspective view of an example of the weeding tool elastically contacting the weeding substrate, which is included in FIG. 10, FIG. 12 to FIG.
4 is a partial sectional view for explaining the vertical adjusting structure of the wheel,

FIG. 12 is a state diagram of the height of the second stage,

FIG. 13: A diagram in the middle of adjusting to the height of the third step,

FIG. 14: Completion drawing of adjustment to the third step height,

FIG. 15 is a perspective view of a rotary lawn mower provided with a two-step blade substrate,

16 is a bottom view of FIG.

[Explanation of code] 1 Speed control lawn mower 2 Lawn board with two blades
3 Projection piece 4 Front blade 5 Back blade
6 Fixture 7 Fixing hole 8 Bolt
9 Weeding rotator 10 Weeding rotator 11 Handle
12 Handle holder 13 Motor 14 Belt cover
15 Grass collecting tool 16 Wind cutting tool 17 Switch
18 front wheel 19 rear wheel 20 belt
21 large pulley 22 small pulley 23 support
24 Support Shaft 25 Weeding Tool 26 Adjusting Tool
27 Adjusting Port 28 Locking Groove 29 Locking Tool
30 Slide port 31 Adjusting shaft 32 Axle
33 adjusting wheel 34 engaging plate 35 connecting plate
36 shelves 37 front and rear wheels 38 motor partition
39 Side plate 40 Coil spring 41 Sliding case
42 spring stand

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[Procedure amendment]

[Submission date] October 30, 1991

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

[Title of Invention] Mower for speed control type lawn

[Claims]

3. Parallel, and the front edge is almost in the traveling direction.
A plurality of projecting pieces facing each other and forming a front blade with a predetermined width,
Even if it is narrow between the protrusions, it is mainly the thickness of the roots to be cut
Width of the upper part and about 50% or more of the dimension between the protrusions, about 300
With deep blade that has the deepest part of the sharp inner blade with a depth within%
Rotatably support a weeding rotor with multiple substrates on the outer periphery
It is connected to the prime mover installed on the
The support shaft of the rolling element can be adjusted up and down to a predetermined height above the ground
Weeding of a substrate with a back blade that is configured and provided on the outer periphery of the weeding rotating body
A means for adjusting the line speed to a speed of 15 US or more per second was provided.
A lawn mower in a speed-controlled lawn.

4. A support body for supporting a weeding rotary body is provided with a prime mover for driving the weeding rotary body, and the height of the support body is adjustable so as to be provided on a vehicle body .
A mower for controlling the lawn according to any one of 3 above.

Wherein the substrate with the inner blade, a such deep blade also leading edge to the trailing edge portion is provided, as well as reversible structured herbicidal rotating body, the inner edge of the front and rear edges both substantially the same rotational The lawn mower in the speed-control type lawn according to any one of claims 1 to 4, which is formed as a surface.

7. and the front edge upward, mower in grass governor type according to any range of paragraphs 1 through 6 of claims which is formed a rear edge downward.

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a sharp back blade at a shallow position between a plurality of protrusions arranged in parallel, and mows only weeds softer than the lawn near the ground surface in a required rotation to reduce work time. Continuity is ensured, and due to the simultaneous replacement structure of multiple boards with back blades, weeds that are mixed in relatively flat lawns such as golf courses and gardens can be selected by speeding up maintenance, changing work details, repairs, etc. Therefore, it is a technology that leaves the lawn behind and mows it, prevents the pesticide from being sprayed with the herbicide, and cuts the lawn at a high speed.

[0002]

2. Description of the Related Art Conventionally, as a device for selectively mowing soft weeds in a lawn without cutting the lawn, the Japanese Patent Application No. 28-1982
No. 5903 Name of invention Mower in lawn and international application number P
CT / JP, 89/01206 Title of Invention Metallic substrate for weeding and weeding tool There was a proposal by Masaru Tsuda. However, if the work speed is set to a speed that does not cut the lawn, if the work rotation is performed only in the same direction, rarely cut grass pieces or fragments of hard epidermis among weeds will stick to the cutting blade. , The phenomenon of cutting weeds occurs, and on the other hand, the lawn is not repelled or slips even if it is hit by grass pieces on the front edge, lawn, etc., and it does not hit the cutting blade directly,
The stickiness tends to increase with time, and the entanglement further increases, and there is no choice but to interrupt the work and perform weeding work on the weeding substrate or the weeding rotary member, or to provide a weeding tool. There are lawn mowers and mowers as similar devices, but since they do not have the function of selectively cutting grass that is softer than lawn, they are not the same kind of device, but in brief, weeding multiple grass cutting boards. There was no specific proposal for removing or removing the entangled grass during the mowing rotation, such as attaching and detaching from the rotating body at the same time. Because the grass is usually the thinnest and most flexible of the grass, but the epidermis is hard and difficult to cut, so when we hit the high-speed cutting blade directly, weeds and grass that have already stuck to the leading edge of the blade are pushed by themselves, This is because the action of cutting or scraping occurs before itself, and since the action continues during the work rotation, sticking and entanglement can be ignored during the sharp practical use of the cutting blade. As an example somewhat similar to the blade type of the weeding substrate used in the present invention, a hedge trimmer is mainly used for pruning a tree, and a small one is used for mowing a small area. The method of use is to fix the lower part of the upper and lower two mowing plates and repeat the reciprocating motion only at the upper part at right angles to the direction of movement of the mowing plate, but form both sides of the inner and inner sides of the protruding piece as side blades The foliage that has entered between the protrusions is cut by the side blades of the upper and lower grass cutting plates, and the back blade facing the traveling direction does not cut the foliage alone. or,
In the direction of movement, it is just a speed to shake by hand to the left and right, so it does not apply a cutting force to the foliage at a considerable speed in front of the back blade at a speed of 4 rice per second or more. For example, it is not possible to selectively mow only weeds that are softer than the lawn in the lawn, even if the hedge trimmer is driven at high speed or low speed.
That is, the device of PCT / JP, 89/01206 and the lawn mower in the adjustable lawn of the present invention are functional, action, effect, purpose, etc. in comparison with any other mowers, lawn mowers and hedge trimmers. However, there is no overall commonality.

[0003]

The problems to be solved are to clarify the depth of the back blade for removing weeds in the lawn, to perform weeding and weeding simultaneously, and to remove the weeding substrate. Clarifying the setting range of the required work speed depending on the season, humidity, length of lawn, etc., and by making the same function in both front and back directions, it is advantageous in automation and it is a forming method that keeps the depth of the back blade constant even when polishing is there. At the same time, the lawn should be cut along with the grass at high speed.

[0004]

According to the present invention, the depth of the inner blade is set to be about 50% or more and about 300% or less of the depth between the projecting pieces, and the front blade is directed upward and the inner blade is directed downward. None, multiple back blades are provided on both the front and rear edges of the weeding substrate, and the prime mover is placed above the weeding rotary body to maintain grass balance in both front and back directions, and weeding and weeding in both forward and reverse rotations. At the same time, the weeding work speed of the weeding substrate is set to an appropriate value in the range of 4 to 13 rice per second, or is settable. Furthermore, the lawn is also mowed by adjusting the speed to 15 rice per second or more. Since the weeding substrate is provided with a back blade, it will be referred to as a substrate with a back blade. More specifically, a plate material for a blade such as a steel plate or a stainless steel plate is mainly used as a material, and the front edges are substantially parallel to each other in the advancing direction,
A plurality of protrusions that form a front blade with a predetermined width, and a width that is at least as large as the thickness of the roots to be mowed, although it is narrow between the protrusions.
And at a shallow position that does not focus the lawn forward,
A vehicle body that rotatably supports a weeding rotary body that has a plurality of substrates with deep blades provided on the outer periphery at a position deeper than at least half of the protruding pieces, with deep blades sharper than the front blades facing each other in the traveling direction. A grass mower in a lawn is basically configured such that it is connected to a prime mover provided in the above and the support shaft of the weeding rotary member can be adjusted to a predetermined height from the ground. In the present invention, in a place where there are few large solid objects, it is preferable to mow extremely soft weeds even with a front blade and to carry out earthmoving in order to achieve a higher working speed. Therefore, the front edges of multiple protrusions are formed with a strong front blade, the rear blade is sharper than the front blade, and the lawn foliage is formed in a shallow position where it does not form a bundle in front of the rear blade between the protrusions. Then, the back blade directly touches the weeds to make it easy to mow, but if it is too shallow, the effect of untangling the lawn is reduced, it is easily damaged, and inconveniences such as not being able to float thick target stems occur. Therefore, it is preferable to provide it at a depth of about the distance between the protrusions. By doing so, most solid objects larger than the space between the protrusions are deeper than the radius. Then, most solid objects larger than the space between the protrusions directly hit the deep blades at the position deeper than the radius. Because it is not damaged. Furthermore, with the front blade facing upwards,
Moreover, if the back blade is formed downward, the front edge of the back blade can be retracted to regain the depth by polishing only the lower surface of the back blade that has become shallow due to the wear and shortening of the front blade. In this board with back blade, the lawn is flexible and the skin is hard, so the grass in front of the front blade is pushed down without being cut, the entanglement with the lawn in front of the next back blade is removed, and the grass in front of the back blade is straight. It becomes easier to touch the crab blade, and weeds such as thick and hard stalks and broad leaves are caught between the protrusions, and those that float up are followed by the substrate with a blade that follows the exposed root. Mowed Furthermore, since the front blade repels a solid object that is larger than the space between the protrusions, this board protects the back blade, and even if it digs into the soil if it is a shallow layer, it does not damage the back blade and rubs the soil, so it is a grounding tool. You can expect the action. It is necessary to adjust the height of these boards with back blades according to the length of the lawn, the type of weeds and the degree of growth. In the present invention, the cutting height of the substrate with the back blade is performed by adjusting the height of the support shaft of the weeding rotor from the ground, rather than the weeding rotor, and a prime mover, for example, a motor and a weeding rotor. The height of the support for supporting the vehicle can be adjusted so that it can be provided on the bogie, but since the structure becomes complicated, it is preferable to make the height of the wheels of the undercarriage adjustable. It is also desirable to be able to adjust the cutting speed of the board with the back blade according to the hardness of the lawn or weed, the sharpness of the cutting blade, etc. depending on the season. If the above-mentioned substrates with back blades are provided in the weeding rotary member in multiples of 2, the adjacent two of those substrates
If the rotating position of one of the protrusions of one sheet is aligned with the rotating position of the other back blade on the weeding rotor, if the width of the back blade is wider than the width of the front blade, it will be sharp without gaps. With the back blade, you will be exposed to the predetermined height of the ground, and you will not be left uncut,
In this way, it is desirable to install the back blade so that the entire cutting surface can be exposed. When the above-mentioned rear blade is formed only on the front edge of the substrate, the blade is always operated in the normal rotation state, and the main action is to selectively cut grass in the lawn. However, if the rear edge is also formed with a back blade, the same work can be done by reversing,
In addition, in both normal and reverse working rotations, there is an effect that the trailing edge portion during rotation is rubbed on the lawn surface so that the grass stuck to the back blade is removed from the opposite direction. As mentioned above,
In a device that rotates both forward and backward, the work may be performed by converting the front and rear of the vehicle body, and the collection of the object is in two front and back directions.
If weeding equipment is provided below the space and a prime mover is provided above, and grass gathering tools that communicate with the space are provided at the front and rear, the grass gathers in the grass gathering tool in the direction opposite to the direction of rotation, and continuous work is possible. It is easy to do, and if these grass collecting tools are detachably constructed and attached, the grass can be quickly treated, cleaning is easy, and both the action of weeding and mowing in the lawn can be obtained during operation. or,
You can also mow the lawn at high speed. Furthermore, we have realized the automation of the wheels, or the connection to a car, so that weeds in the lawn can be mowed by remote control. Also, although motors are cited as prime movers, it is obvious that other prime movers may be used, for example internal combustion engines.

[0005]

1 to 6, a blade plate material for a blade such as a steel plate or a stainless steel plate is mainly used as a material, and the front blades 4 are arranged in parallel and have a predetermined width such that the front edges are substantially opposed to each other in the traveling direction. A plurality of projecting pieces 3 formed with a plurality of the projecting pieces 3 and a width between the projecting pieces 3 which is narrower than the thickness of the roots to be mowed, but about 50% or more of the dimension between the projecting pieces (3). The deepest part of the sharp back blade 5 is provided at a depth of 300% or less, and the back blade 5
Are formed to face each other in the traveling direction. In FIGS. 1 and 2, the front edge of the projecting piece has an arc shape in which the front edge is slightly retracted, and the substrate is curved inward. Further, the front blade is formed upward and the rear blade is formed downward. In FIGS. 3 and 4, a mounting plate 6 is provided on a substrate bent at the center, and a support shaft 24 of the weeding rotor 10 is mounted through the mounting plate 6.
It is fixed integrally with the supporting tool 23 provided in the above, but the rotation phases of the protrusions of one back blade of the two backing boards and the other backing board are aligned (α in FIG. 5). , Β) is the arrangement of the back blades that expose the rotating surface of the back blade substrate on the outer periphery of the rotating body with almost no space, and the rear edge of the back blade substrate is shown by the broken line of the small circle in FIG. If it is formed as a subcurved surface and attached as shown in the figure, when it is rotated in the direction of the arrow, it does not collide elastically and slightly with the weeding tool brought into contact with it. As an example of the above-mentioned substrate 2 with a back blade, when the back blade and the protruding piece width are 6 mm and the deepest portion of the back blade is formed with a depth of 5 mm, when weeding mainly clover It is desirable that the weeding substrate provided on the outer periphery of the weeding rotary member is variable in a speed of 4 to 13 rice per second and is reversible. If the speed is 7-8 US / s,
Within the period of being a new and relatively sharp blade, even when the grass of the lawn in late autumn is relatively hard, the lawn can be cut approximately 15 cm long with little damage to the lawn. Therefore, if the lawn is about 5 cm, it is easier to be repelled, and even if the working speed of the weeding substrate is set within the range of 10 to 13 rice per second, weeding may be possible without causing fatal damage to the lawn. However, in the spring, the skin of the lawn is soft, and the lawn may be damaged unless the speed is reduced to about 4 to 7 rice per second. Therefore, since it is a complex and uncalculable factor such as sharpness of blade, season, kind of grass, length, humidity of atmosphere and grass, moisture content, etc., it should be possible to adjust to the most suitable working speed on site. is important.
A lawn mower provided with the above-mentioned board with a back blade will be described with reference to the drawings. Front and rear bi-directional lawn mower 1
Is provided on both sides with side plates 39 whose peripheral edges are bent to have a constant width, and the front and rear wheels 37, the weeding rotator 10 in the center, and then the front and rear wheels 37 are provided from one side between the both side plates. The support shaft 24 of the weeding rotator 10 penetrates the side plate 39, and the large pulley 21 is fitted on the outside thereof. The shaft end of the motor 13 in the motor partition 38 penetrates the side plate immediately above. And a small pulley 22 is fitted therein, and the large and small pulleys are connected by a belt 20 (first
(Fig. 0). Further, just below the large pulley 21, a handle receiver 12 supports a lower end portion of the handle 11 so as to be rotatable by a predetermined angle.
If the handle is rotated in the opposite direction, it can be held at the position shown by the chain double-dashed line and can move backward (Fig. 10). The weeding substrate has back blades on both front and rear edges. Further, between the side plates, a shelf 36 is provided up to the end except for the central portion in the middle stage, and in the central portion, below the motor partition wall 38, on the upper surfaces of both inner end portions of the shelves, the wind blower 16 is provided. A rotating portion is attached, and a rotating end edge portion of the wind cutting tool 16 is supported on an upper part of the weeding tool 25 provided in the center. Therefore, when the wind cutting tool 16 is rotated upward by the rotating wind force of the weeding rotor 10, the wind cutting tool 16 on the opposite side has a negative pressure on the lower side, and the wind pressure is applied downward on the grass. It is pressed against the upper surface of the paying tool 25 (Figs. 9, 10). Furthermore, the back blade is rotating on the same circumference both front and back. Thus, when the weeding rotator 10 rotates in the direction of the large arrow, the wind cutter 16 pushed from below by the wind force rotates upward and comes into pressure contact with the lower portion of the motor partition 38, and the wind cutter on the opposite side. The grass is blown off by the wind above 16 and jumps into the grass collecting tool in the direction of the small arrow. At this time, if the handle 11 is pushed in the direction of the arrow, the grass in the lawn can be mowed, and at the same time, the step edge at the trailing edge is weeded by the lawn. Further, if the weeding rotary body is used for reverse rotation, the vehicle body can also be moved in the opposite direction to perform grass cutting work, but the back blade on the opposite side of the weeding substrate will perform grass cutting. Even in this reverse work, the back blade rotates on the same circumference of the front and rear, and the position of the motor is in the center, so the balance is good. The weeding tool 25 described above has an arc-shaped cross section, and spring stands 42 are fixed to the upper portions of both side ends, and the spring stands 42 are attached to the slide cases 41 provided on the inner walls of both side plates.
The fixed part of is inserted, and the coil spring 40
It is pressed elastically to the lower end (Figs. 10 and 11). Therefore, the weeding tool 25 is elastically in contact with the back-edged board 2. (Figs. 9, 10, 11). In the lawn mower 1 in the lawn of this example, both ends of the axle 32 are fixed below the left and right adjusters 26 made of a metal plate in order to adjust the cutting height by the front and rear wheels 37. An adjusting shaft 31 is penetrated below the end, and one end is fixed to the inner wall of the side plate 39. The slide groove 30 is opened upward from the central portion of the adjusting tool 26.
When the locking tool 29, which is configured to be slidable along 0, is located at the uppermost position (see FIG. 13), the adjusting tool 26 rotates the adjusting port 27 from the upper end to the lower end about the adjusting shaft 31. The adjusting tool 26 can be freely placed at an appropriate position, for example, the middle stage (12th stage).
To move to the uppermost stage from the figure, slide the locking tool 29 upward and rotate the adjusting tool 26 above the locking groove 28,
Of the three steps, it may be slid downward in accordance with the uppermost engaging groove 28 (Fig. 14). At this time, the front and rear wheels 37 are lifted higher by the amount of pulling up the axle 32, and the height is set at that position. Since the adjusting tool 26 can be fixed to any of the three-step locking grooves 28 by the above-described operation, the cutting height of the mower in the lawn of this example can be set to three steps. In addition, it is preferable to apply a return pressure downward to the locking tool via an elastic body because it is easy to operate. The slide type adjusting device of the above-mentioned example has a simple structure and can be applied to the operation of a single wheel, and it is also preferable that a pipe is used as a locking tool so that the adjusting tool is penetrated. Incidentally, FIG.
7 to FIG. 19 shows one embodiment of a substrate with a back blade, in which the front blade forms a curved edge at a corner on one side and is continuous with the back blade, Although the front edge is slightly inclined, it has a back blade effective for cutting and has a slight effect of repelling obstacles, hooking grass, and pushing down the lawn, so the present invention It is included in the substrate with the back blade that constitutes the.

[0006]

As described above, in the lawn mower in the speed-controlled lawn of the present invention, the depth of the back blade of the board with the back blade is formed within the range of 50 to 300% of the dimension between the protrusions. , The back blade is hard to damage with a solid object, the thick weed stalk is hooked between the protrusions to make the root float, and the protrusion disentangles the lawn and makes it easy to touch the weed directly to the back blade. , Weeding can be done smoothly and sufficiently,
When the front blade is formed upward and the back blade is formed downward, the front blade and the back blade can be sharpened only by polishing the lower surface, and the depth position of the back blade can be adjusted to some extent. Further, since the back blades are formed on both the front and rear edges of the weeding substrate and can be operated in both forward and reverse rotations, the back blade on the front edge side can weed and the back blade on the rear edge side can weed. Furthermore, if a motor is placed above the center of the weeding rotor, the functions in both front and rear directions can be made the same, so weeding can be done regardless of whether it is connected to the car or it is self-propelled. If the work speed of the board with the back blade can be set to an appropriate value, the desired work speed can be selected according to the work environment such as season, growth rate, dryness and humidity. Weeding work can be carried out quickly, sufficiently and smoothly. Furthermore, the lawn can be simultaneously mowed at a high working speed of 15 rice per second or more.

[Brief description of drawings]

FIG. 1 is a partial plan view of a preferred example of a substrate with a back blade,

2 is a cross-sectional view taken along one-dot chain line a -.- a 'in FIG. 1,

FIG. 3 is a plan view in which a mounting plate is fixed to a preferred example of a board with a back blade,

4 is a cross-sectional view taken along alternate long and short dash line b -.- b 'in FIG. 3,

FIG. 5 is a front view of an example of a weeding rotary member,

6 is a side view of the weeding rotor of FIG. 4,

FIG. 7 is a reduced front view of an example of a front-rear type of a mower in a lawn,

8 is a side view of the example of FIG. 7,

9 is an enlarged view of the main body part of FIG. 7,

10 is a perspective view of FIG. 9,

11 is a perspective view of an example of the weeding tool elastically contacting the weeding substrate, which is included in FIG. 10, FIG. 12 to FIG.
4 is a partial sectional view for explaining the vertical adjusting structure of the wheel,

FIG. 12 is a state diagram of the height of the second stage,

FIG. 13: A diagram in the middle of adjusting to the height of the third step,

FIG. 14: Completion drawing of adjustment to the third step height,

FIG. 15 is a perspective view of a rotary lawn mower provided with a substrate with a back blade,

16 is a bottom view of FIG.

FIG. 17 is an enlarged partial plan view of another embodiment of a substrate with a back blade,

FIG. 18 is a sectional view of FIG. 17 a--a '.

FIG. 19 is a section b-b 'of FIG.

[Explanation of symbols] 1 Lawn mower in a speed-controlled lawn 2 Board with back blade
3 Projection piece 4 Front blade 5 Back blade
6 Fixture 7 Fixing hole 8 Bolt
9 Weeding rotator 10 Weeding rotator 11 Handle
12 Handle holder 13 Motor 14 Belt cover
15 Grass collecting tool 16 Wind cutting tool 17 Switch
18 front wheel 19 rear wheel 20 belt
21 large pulley 22 small pulley 23 support
24 Support Shaft 25 Weeding Tool 26 Adjusting Tool
27 Adjusting Port 28 Locking Groove 29 Locking Tool
30 Slide port 31 Adjusting shaft 32 Axle
33 adjusting wheel 34 engaging plate 35 connecting plate
36 shelves 37 front and rear wheels 38 motor partition
39 Side plate 40 Coil spring 41 Sliding case
42 spring stand

[Procedure 3]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 17

[Correction method] Added

[Correction content]

FIG. 17

[Procedure amendment 4]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 18

[Correction method] Added

[Correction content]

FIG. 18

[Procedure Amendment 5]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 19

[Correction method] Added

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FIG. 19 ─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] April 23, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

7. The lawn mower according to any one of claims 1 to 6, wherein the front blade is formed upward and the rear blade is formed downward. ─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] September 28, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

[Title of Invention] Mower for speed control type lawn

[Claims]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lawn mower which drives a weeding rotary body provided with a plurality of substrates with back blades provided between a plurality of protrusions by a prime mover, and weeds including lawn at high rotation. The grass is cut in the grass and the grass is left in the grass to cut softer weeds than the grass. It also aims to prevent pesticide pollution from herbicide spraying at golf courses and gardens.

[0002]

2. Description of the Related Art Conventionally, a lawn mower for driving a rotary body having a back blade substrate provided with a back blade between a large number of protrusions is used for selectively driving soft weeds in the lawn without cutting the lawn. There was a proposal by Masaru Tsuda, the inventor of Japanese Patent Application No. 301029 in 1988 as a cutting device. However, the working speed is
When setting the speed so that the lawn is not cut, if the work rotation is performed only in the same direction, the weeds will be cut while the grass fragments that are rarely torn and fragments of the hard outer skin of the weeds stick to the cutting blade. On the other hand, the lawn does not directly hit the cutting blade by being repelled or slipping even if the lawn hits the grass on the front edge, grass, etc., and the stickiness tends to increase over time, However, the only way to do this is to interrupt the work and perform the weeding work on the weeding substrate or the weeding rotary member, or to provide a weeding tool. As a similar device, there are lawn mowers and mowers, but those of the reel type do not have a function to selectively mow grass softer than the lawn, not a weeding plate such as providing a back blade between many projections,
Although it is not the same kind of device, in brief, there is no specific proposal to remove or attach multiple grass cutting plates from the weeding rotary body at the same time, or to remove the tangled grass during the rotation of the mowing grass. This is because the grass is usually the thinnest and softest of the grass, but the skin is hard and difficult to mow, so at the position where the fixed blade and the rotary blade are slid together, cutting between the two blades and sticking to the leading edge of the blade at the same time. This is because the action of scraping off weeds and lawns that are present occurs continuously during the work rotation, so stickiness and entanglement could be ignored during the sharp practical use of the cutting blade. As an example somewhat similar to the blade type of the weeding substrate used in the present invention, a hedge trimmer is mainly used for pruning a tree, and a small one is used for mowing a small area. The method of use is to fix the lower part of the upper and lower two mowing boards, and repeat the reciprocating motion only at the upper part at right angles to the direction of movement of the mowing plate, but on both sides of the inner and inner sides of the protrusion to form side blades, The foliage that has entered between the protrusions is cut by the side blades of the upper and lower grass cutting plates, and the back blade facing the direction of travel does not cut the foliage alone. Further, in the traveling direction, since it is only a speed of shaking by hand to the left and right, a cutting force is not applied to the foliage at a considerable speed in front of the back blade at a speed of 4 rice per second or more. For example, it is not possible to selectively mow only weeds that are softer than the lawn in the lawn, even if the hedge trimmer is driven at high speed or low speed. That is, P
The CT / JP, 89/01206 device and the speed control type lawn mower of the present invention are functional, effective, effective, and objectively effective in comparison with any other mowers, lawn mowers or hedge trimmers. However, there is no overall commonality.

[0003]

The problems to be solved are to clarify the depth of the back blade for removing weeds in the lawn, and to leave uncut areas on the surface of the intermittent back blades. To prevent this from happening, shift the rotational phase of the back blades of multiple boards with back blades, perform weeding and weeding at the same time, and set the required work speed depending on the season of the weeding board, humidity, lawn length, etc. This is a forming method in which the same function is exhibited in both front and rear directions, automation is advantageous, and the depth of the back blade is kept constant even during polishing. At the same time, the lawn should be cut along with the grass at high speed.

[0004]

According to the present invention, the depth of the back blade is limited to a fixed range, and in a place where almost no solid matter such as pebbles exists, the front blade is directed upward and the back blade is directed downward. Multiple back blades are provided on both the front and rear edges of the weeding board, the prime mover is placed above the weeding rotary body to maintain the balance with grass collection in both front and back directions, and weeding work and weeding are performed by both forward and reverse rotations. The weeding work speed of the weeding substrate is set to an appropriate value in the range of 4 to 13 rice per second, or is settable. In addition, the inner blade is also formed upwards to improve solid matter and speed 1 second.
The present invention relates to a mower having a board with a back blade that can be adjusted to a speed of 5 rice or more and also cuts lawns. More specifically, steel plates,
A plate material for cutlery such as a stainless steel plate is mainly used as a material, and in order to selectively mow the weeds in the lawn, the front blades are formed in parallel and the front edges are substantially opposed to each other in the traveling direction and have a predetermined width. A plurality of protrusions, and even if narrow between the protrusions, the front blade is mainly located at a width not less than the thickness of the roots to be mowed and at a shallow position that does not focus the lawn forward, and at least at a position deeper than half the protrusion interval. The weeding rotor is connected to a prime mover provided on a vehicle body that rotatably supports a weeding rotor having a plurality of substrates with back blades provided with opposing sharp blades facing each other in the traveling direction. The support shaft can be adjusted to a predetermined height above the ground, and in the place where there are few large solid objects, side blades can be formed to cut the weeds and the front blade can also soften the weeds for faster work speed. , Leveling the raised part of the ground Is preferably benefit, further adjustment of the rotational speed of the herbicide rotator relates mower is proceeding effectively. Therefore, the front edge of many projections is formed into a sturdy front blade, the back blade is sharper than the front blade, and the lawn foliage is formed at a shallow position where it does not form a bundle in front of the back blade between the projections.
Although it is easy to mow it by touching the back blade directly with the weeds, if it is too shallow, the effect of untangling the lawn will be reduced, it will be easily damaged, and inconveniences such as the fact that the thick target stem cannot be floated will occur. Within 200% of interval and 30%
It is preferable to provide it at a certain depth. This is because most of the solid objects larger than the protrusion interval do not directly hit or damage the inner blade located deeper than the radius.
Furthermore, if the front blade is facing upward and the back blade is facing downward, the back blade is less likely to be damaged by pebbles, but if the back blade is facing downward,
The front edge of the back blade can be retracted to regain the depth by polishing only the lower surface of the back blade, which became shallow due to the front blade being worn and shortened. If you work on this board with back blade at an appropriate speed, the lawn is flexible and the skin is hard, so the lawn in front of the front blade is pushed down without being cut, and the entanglement with the lawn in front of the adjacent back blade will come off. The grass in front of the back blade can be easily touched by the back blade, and weeds such as thick and hard stems and broad leaves are also caught between the protrusions, and the raised ones show the exposed roots from behind. Mowed by the board with a back blade that follows. Further, in this substrate, the front blade repels a solid material larger than the space between the protrusions, so that the back blade is protected, and if the shallow layer digs into the soil, the back blade is less likely to be damaged.
The substrate with a back blade is not limited to a flat plate shape, and it is also preferable to form it into a curved surface having an arc shape or a spiral shape in cross section. However, it is necessary to adjust the height depending on the length of the lawn, the type of weed, and the growth level. In the present invention, the cutting height of the substrate with the back blade is performed by adjusting the weeding rotary body or the height of the support axis of the weeding rotary body from the ground, and supports the prime mover, for example, the motor and the weeding rotary body. It is possible to adjust the height of the supporting body to be adjustable on the carriage, but it is preferable to make the height of the wheels of the chassis adjustable because the structure becomes complicated. In addition, it is desirable to be able to adjust the cutting speed of the board with the back blade according to the hardness of the lawn or weed, the sharpness of the cutting blade, etc. depending on the season. If the above-mentioned substrate with a back blade is provided in the weeding rotary member in a multiple of 2, the position of one of the two adjacent protrusions of those substrates at the time of rotation is the position of the other back blade at the time of rotation. If the width of the back blade is wider than the width of the front blade, it is also provided on the weeding rotary body, and the sharp back blade with no gap will expose the predetermined ground height, and there will be no uncut residue. It is desirable to attach it so that the whole cutting surface can be exposed with the back blade. When the above-mentioned back blade is formed only on the front edge of the substrate, it is always operated in the normal rotation state, and the main action is to selectively weed the grass. However, if a rear blade is also formed on the trailing edge, the same work can be performed by reversing, and in addition, in both forward and reverse work rotation,
The effect is that the trailing edge of the rotation will rub against the grass so that the grass stuck to the back blade is removed from the opposite direction. As described above, in the device using both forward and reverse rotations,
Since the work may be performed by changing the front and rear of the vehicle body, and the collection of the object is performed in the two front and rear directions, a grass cutting space is provided above the weeding rotary member, and a grass cutter is provided below the space. If a prime mover is installed above and grass weeding tools that communicate with the space are provided at the front and rear, the grass weeds will be gathered in the grass weeding tool in the direction opposite to the direction of rotation, making it easy to carry out continuous work. If it is constructed and installed, it can process the grass quickly, is easy to clean, and has the effects of weeding and mowing the grass during operation. You can also mow the lawn at high speed. In addition, self-propelled or towed, in addition to remote control, motors have been cited, but obviously other prime movers such as internal combustion engines may be used.

[0005]

1 to 6, a blade plate material for a blade such as a steel plate or a stainless steel plate is mainly used as a material, and the front blades 4 are arranged in parallel and have a predetermined width such that the front edges are substantially opposed to each other in the traveling direction. A plurality of projections 3 formed with a plurality of projections 3 and a width between the projections 3 that is narrower than the thickness of the roots to be mowed, even if narrow, and approximately 30% or more and approximately 200% or less of the dimension between the projections (3). With the deepest part of the sharp back blade 5 at the depth of
Are formed to face each other in the traveling direction. In FIGS. 1 and 2, the front edge of the projection is slightly arcuate and the substrate is curved inward. Further, the front blade is formed upward and the rear blade is formed downward. In FIGS. 3 and 4, a mounting plate 6 is provided on a substrate bent at the center, and a support shaft 24 of the weeding rotor 10 is mounted through the mounting plate 6.
It is fixed integrally with the support tool 23 provided in, but the rotation phases of the protrusions of one back blade of the two backing boards and the other backing board are aligned (α in FIG. 5, (See β), which is the arrangement of the back blade that exposes the rotating surface of the back blade substrate on the outer periphery of the rotating body with almost no gap, and the rear edge of the back blade substrate is indicated by the broken line of the small circle in FIG. If it is formed in a secondary curved surface and attached as shown in the figure, when it is rotated in the direction of the arrow, it does not collide elastically and slightly with the weeding tool that is in slight contact. As an example of the above-mentioned board 2 with a back blade, when the back blade and the projection width are 6 mm and the deepest part of the back blade is formed with a depth of 5 mm, when weeding mainly weeded clover, It is desirable that the weeding substrate provided on the outer periphery of the weeding rotary member be variable at a speed of 4 to 13 rice per second so as to be reversible. If the speed is 7-8 US / s,
Within the period of being a new and relatively sharp blade, even when the grass of the lawn in late autumn is relatively hard, the lawn can be cut approximately 15 cm long with little damage to the lawn. Therefore, if the lawn is about 5 cm, it is easier to be repelled, and even if the working speed of the weeding substrate is set within the range of 10 to 13 rice per second, weeding may be possible without causing fatal damage to the lawn. , In spring, the lawn's epidermis is soft, and unless the speed is reduced to about 4 to 7 rice per second, the lawn may be damaged. Because of that, the sharpness of the blade,
Since it is a complex and uncalculable factor such as season, type of grass, length, humidity of the atmosphere and grass, moisture content, etc., it is important to be able to adjust to the most suitable working speed on site, especially for the motor rotation. It is preferable to add a control device. A lawn mower provided with the above-mentioned board with a back blade will be described with reference to the drawings. The lawn mower 1 for both front and rear speed control type lawn mowers is provided with side plates 39 on both sides of which peripheral edges are bent at a constant width to form a peripheral edge. The weeding rotator 10 and then the front and rear wheels 37 are provided again, the support shaft 24 of the weeding rotator 10 penetrates the side plate 39, and the large pulley 21 is fitted on the outer side thereof. The shaft end of the motor 13 inside protrudes through the side plate, the small pulley 22 is fitted, and the large and small pulleys are connected by the belt 20 (Fig. 10). A speed controller is connected to the motor.
Further, a handle holder 12 is provided directly below the large pulley 21.
The lower end of the is supported rotatably by a predetermined angle, but if the handle is rotated in the opposite direction, it can be held at the position indicated by the chain double-dashed line and can move backward (FIG. 10). The weeding substrate has back blades on both front and rear edges. Further, between the side plates, a shelf 36 is provided up to the end except for the central portion in the middle stage, and in the central portion, below the motor partition wall 38, on the upper surfaces of both inner end portions of the shelves, the wind blower 16 is provided. A rotating portion is attached, and a rotating end edge portion of the wind cutting tool 16 is supported on an upper part of the weeding tool 25 provided in the center. Therefore, when the wind cutting tool 16 is rotated upward by the rotating wind force of the weeding rotary member 10, the wind cutting tool 16 on the opposite side has a negative pressure on the lower side, and the wind pressure is applied downward on the upper side.
It is pressed against the upper surface of the weeding tool 25 (9th, 10th).
Figure). Furthermore, the back blade is rotating on the same circumference both front and back.
Thus, when the weeding rotator 10 rotates in the direction of the large arrow, the wind cutter 16 pushed from below by the wind force rotates upward and comes into pressure contact with the lower portion of the motor partition 38, and the wind cutter on the opposite side. The grass is blown off by the wind above 16 and jumps into the grass collecting tool in the direction of the small arrow. At this time, if the handle 11 is pushed in the direction of the arrow, the grass in the lawn can be mowed, and at the same time, the rear blade of the trailing edge is weeded by the lawn. Further, if the weeding rotary body is used for reverse rotation, the vehicle body can also be moved in the opposite direction to perform grass cutting work, but the back blade on the opposite side of the weeding substrate will perform grass cutting. Even in this reverse work, the back blade rotates on the same circumference of the front and rear, and the position of the motor is in the center, so the balance is good. The weeding tool 25 described above has an arc-shaped cross section, spring stands 42 are fixed to upper portions of both side ends, and fixed portions of the spring stands 42 are inserted into slide cases 41 provided on inner walls of both side plates. The lower end is elastically pressed against the lower end by the coil spring 40 (Figs. 10 and 11). Therefore,
The weeding tool 25 elastically contacts the substrate 2 with the back blade (FIGS. 9, 10, and 11). The lawn mower 1 in the lawn of this example
In order to adjust the cutting height by the front and rear wheels 37, both ends of the axle 32 are fixed below the left and right adjusters 26 made of a metal plate, and the adjustment shaft 31 does not penetrate below these axle ends. In addition, one end is fixed to the inner wall of the side plate 39. When the slide groove 30 is opened upward from the central portion of the adjusting tool 26 and the locking tool 29 configured to be slidable along the slide groove 30 is located at the uppermost position (first (See FIG. 13), the adjusting tool 26 is rotatable about the adjusting shaft 31 from the upper end to the lower end, and the adjusting tool 26 can be moved to an appropriate position, for example, from the middle stage (FIG. 12) to the uppermost stage. In order to transfer, the locking tool 29 is slid upward, the adjusting tool 26 is rotated above the locking groove 28, and the adjusting tool 26 is slid downward in accordance with the uppermost locking groove 28 of the three steps. It should be good (Fig. 14). At this time, the front and rear wheels 37
Is lifted higher by the amount by which the axle 32 is pulled up, and the height is set at that position. Since the adjusting tool 26 can be fixed to any of the three-stage locking grooves 28 by the above-described operation, the cutting height of the mowing machine in the lawn of this example can be set to three steps. In addition, via the elastic body to the locking tool,
It is preferable to apply a return pressure downward so that the operation is easy. The slide type adjusting device of the above-mentioned example has a simple structure and can be applied to the operation of a single wheel, and it is also preferable that a pipe is used as a locking tool so that the adjusting tool is penetrated. It should be noted that FIG. 17 to FIG. 19 show one embodiment of a substrate with a back blade, in which the front blade forms a curved edge at the corner on one side and is continuous with the back blade, The front edge of the front blade is slightly inclined, but since it has a back blade that is effective for cutting, it has a slight effect of repelling obstacles, grass, and pushing down the lawn. Mow softer weeds, leaving the lawn in the lawn. Further, in FIG. 20 and FIG. 21, the weeding rotary body 10
Four substrates 2 with a back blade that are curved in a spiral shape are fixed to the support tool 23 at equal intervals on the outer periphery of the substrate. The front blade and the back blade described above are provided on the substrate, and The above-mentioned substrate with a back blade is only curved, and the lawn mower with a reel-type screwed blade also has a front blade and a back blade as described above. It is included in the present invention.

[0006]

As described above, the lawn mower in the speed-controlled lawn of the present invention forms the depth of the back blade of the substrate with the back blade within the range of 30 to 200% of the dimension between the protrusions. The back blade is hard to damage with a solid object, the thick weed stalks are hooked between the protruding pieces to float the roots, and many protrusions whose front edges are parallel to each other in the traveling direction parallel to the lawn at low speed. Unraveling makes it easier to touch the weeds directly to the rear blades, so weeds can be left behind without leaving the lawn, the lawn can be cut at high speed, and if the front blade is upward and the rear blade is downward, In addition to sharpening the front and back blades only by polishing, the depth position of the back blade can be adjusted to some extent. Further, since the back blades are formed on the front and rear edges of the weeding substrate and can be operated in both forward and reverse rotations, the back blade on the front edge side can weed and the back blade on the rear edge side can weed. Furthermore,
By arranging a motor above the center of the weeding rotor, the functions in both front and rear directions can be made the same, so weeding can be done regardless of front or back even if it is connected to a car or it is self-propelled If you can set the work speed of the board with the back blade to an appropriate value, you can select the desired rotation speed according to the work environment such as season, growth rate, dryness and humidity, and speed up the weeding work. It can be performed sufficiently and smoothly. Furthermore, the lawn can be simultaneously mowed at a high rotation speed of about 15 rice per second or more.

BRIEF DESCRIPTION OF THE DRAWINGS The drawing is a reduced schematic view of one embodiment according to the invention,

FIG. 1 is a partial plan view of a preferred example of a substrate with a back blade,

2 is a cross-sectional view taken along alternate long and short dash line a -.- a 'in FIG.

FIG. 3 is a plan view in which a mounting plate is fixed to a preferred example of a board with a back blade,

4 is a cross-sectional view taken along alternate long and short dash line b -.- b 'in FIG. 3,

FIG. 5 is a front view of an example of a weeding rotary member,

6 is a side view of the weeding rotor of FIG. 4,

FIG. 7 is a reduced front view of an example of a front-rear type of a mower in a lawn,

8 is a side view of the example of FIG. 7,

9 is an enlarged view of the main body part of FIG. 7,

10 is a perspective view of FIG. 9,

11 is a perspective view of an example of the weeding tool elastically contacting the weeding substrate, which is included in FIG. 10, FIG. 12 to FIG.
4 is a partial sectional view for explaining the wheel height adjusting structure,

FIG. 12 is a state diagram of the height of the second stage,

[Fig. 13] An intermediate view of adjusting to the height of the third step,

FIG. 14: Completion drawing of adjustment to the third step height,

FIG. 15 is a perspective view of a rotary lawn mower provided with a substrate with a back blade,

16 is a bottom view of FIG.

FIG. 17 is an enlarged partial plan view of another embodiment of a substrate with a back blade,

FIG. 18 is a section a--a ′ of FIG.

FIG. 19 is a section b--b 'of FIG.

FIG. 20 is a front view of an example of a weeding rotary member to which a screw-shaped substrate with a back blade is attached,

FIG. 21 is a left side view of the weeding rotary member shown in FIG. 20.

[Explanation of symbols] 1 Lawn mower in a speed-controlled lawn 2 Board with back blade
3 Protrusion 4 Front blade 5 Back blade
6 Fixture 7 Fixing Hole 8 Bolt 10 Weeding Rotator 11 Handle
12 Handle holder 13 Motor 14 Belt cover
15 Grass collecting tool 16 Wind cutting tool 17 Switch
18 front wheel 19 rear wheel 20 belt
21 large pulley 22 small pulley 23 support
24 Support Shaft 25 Weeding Tool 26 Adjusting Tool
27 Adjusting Port 28 Locking Groove 29 Locking Tool
30 Slide port 31 Adjusting shaft 32 Axle
33 Adjustment Wheel 34 Engagement Plate 35 Connection Plate
36 shelves 37 front and rear wheels 38 motor partition
39 Side plate 40 Coil spring 41 Sliding case
42 spring stand

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 20

[Correction method] Added

[Correction content]

FIG. 20

[Procedure 3]

[Document name to be corrected] Drawing

[Correction target item name] Fig. 21

[Correction method] Added

[Correction content]

FIG. 21 ─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] December 7, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

[Title of Invention] Mower for speed control type lawn

[Claims]

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lawn mower which drives a weeding rotary body provided with a plurality of substrates with back blades provided between a plurality of protrusions by a prime mover, and weeds including lawn at high rotation. The grass is cut in the grass and the grass is left in the grass to cut softer weeds than the grass. It also aims to prevent pesticide pollution from herbicide spraying at golf courses and gardens.

[0002]

2. Description of the Related Art Conventionally, as a lawn mower for driving a rotating body having a back blade substrate provided with a back blade between a large number of projections and driving a rotary body, the soft grass in the lawn is selectively cut without cutting the lawn. There was a proposal by Masaru Tsuda, the inventor of Japanese Patent Application No. 301029 in 1988 as a cutting device. However, the working speed is
When setting the speed so that the lawn is not cut, if the work rotation is performed only in the same direction, the weeds will be cut while the grass fragments that are rarely torn and fragments of the hard outer skin of the weeds stick to the cutting blade. On the other hand, the lawn does not directly hit the cutting blade by being repelled or slipping even if the lawn hits the grass on the front edge, grass, etc., and the stickiness tends to increase over time, However, the only way to do this is to interrupt the work and perform the weeding work on the weeding substrate or the weeding rotary member, or to provide a weeding tool. As a similar device, there are lawn mowers and mowers, but those of the reel type do not have a function to selectively mow grass softer than the lawn, not a weeding plate such as providing a back blade between many projections,
Although it is not the same kind of device, in short, there is no specific proposal to remove or attach a plurality of grass cutting boards from the weeding rotary body at the same time, or to remove the tangled grass during the mowing rotation, and there was no need for it. This is because the grass is usually the thinnest and softest of the grass, but the skin is hard and difficult to mow, so at the position where the fixed blade and the rotary blade are slid together, cutting between the two blades and sticking to the leading edge of the blade at the same time. This is because the action of scraping off the weeds and lawns that are present occurs, and since the action continues during the work rotation, sticking and entanglement were negligible during the sharp practical use of the cutting blade. As an example somewhat similar to the blade type of the weeding substrate used in the present invention, a hedge trimmer is mainly used for pruning a tree, and a small one is used for mowing a small area. The method of use is to fix the lower stage of the upper and lower two mowing boards and repeat the reciprocating movement only at the upper stage at right angles to the direction of movement of the mowing plate, but form both sides of the inner and inner sides of the protrusion into side blades, The foliage that has entered between the projections is cut by the side blades of the upper and lower grass cutting plates, and the back blade facing the direction of travel does not cut the foliage alone. Further, in the traveling direction, since it is only the speed of shaking by hand to the left and right, the cutting force is not applied to the foliage at a considerable speed in front of the back blade at a speed of 4 rice per second or more. For example, it is not possible to selectively mow only weeds that are softer than the lawn in the lawn, even if the hedge trimmer is driven at high speed or low speed. That is, P
The CT / JP, 89/01206 device and the speed control type lawn mower of the present invention are functional, effective, effective, and objectively effective in comparison with any other mowers, lawn mowers or hedge trimmers. However, there is no overall commonality.

[0003]

The problems to be solved are to clarify the depth of the back blade for removing weeds in the lawn, and not to leave uncut areas on the surface of the intermittent back blades. As described above, shifting the rotational phase of the back blades of multiple backing boards, performing weeding and weeding simultaneously, and setting the required work speed depending on the season of the weeding board, humidity, lawn length, etc. This is a forming method that clarifies and exerts the same function in both the front and back directions to make automation advantageous and keep the depth of the back blade constant even during polishing. At the same time, the lawn should be cut along with the grass at high speed.

[0004]

According to the present invention, the depth of the back blade is limited to a fixed range, and in a place where almost no solid matter such as pebbles exists, the front blade is directed upward and the back blade is directed downward. Multiple back blades are provided on both the front and rear edges of the weeding board, the prime mover is placed above the weeding rotary body to maintain the balance with grass collection in both front and back directions, and weeding work and weeding are performed by both forward and reverse rotations. The weeding work speed of the weeding substrate is set to an appropriate value in the range of 4 to 13 rice per second, or is settable. In addition, the inner blade is also formed upwards to improve solid matter and speed 1 second.
The present invention relates to a mower having a board with a back blade that can be adjusted to a speed of 5 rice or more and also cuts lawns. More specifically, steel plates,
Mainly using a plate material for blades such as stainless steel plate as a material, in order to selectively mow the weeds in the lawn, it is desirable to provide projections and back blades on the weeding substrate, but more preferably in parallel. In addition, a plurality of protrusions whose front edges are substantially opposed to each other in the traveling direction to form a front blade with a predetermined width, and a width between the protrusions that is narrower than the thickness of the roots to be mowed but is not less than the width of the lawn, A weeding rotator provided with a plurality of substrates with a back blade provided on the outer periphery at a shallow position where focusing is not performed and at a position deeper than at least half of the projection interval, a back blade sharper than the front blade is provided oppositely in the traveling direction. Is connected to a prime mover provided on a vehicle body that is rotatably supported, and the supporting shaft of the weeding rotary body is adjustable to a predetermined height above the ground. Faster in places with little entanglement In order to do the work, it is preferable to form the back blades on both sides of the protrusion, or to form it diagonally.It is also preferable to mow soft weeds with the front blade and level the raised parts of the ground. The present invention relates to a mower capable of effectively performing work by adjusting the rotation speed of the body. Therefore, forming the front edge of many protrusions into a sturdy front blade,
It is preferable that the back blade is sharper than the front blade and that the lawn foliage is formed in a shallow position in front of the back blade between the projections so that it does not bundle up, and the back blade directly touches the weeds to facilitate cutting, but If it is too shallow, the effect of untangling the lawn will be reduced, it will be easily damaged, and there will be inconveniences such as the action of catching floating roots, stems, blades, etc., so it will be within 200% of the protrusion interval and 30%. It is desirable to provide it at a depth of about a certain degree or more. This is because most of the solid objects larger than the protrusion interval do not directly hit or damage the inner blade located deeper than the radius. Furthermore, if the front blade is formed upward and the back blade is formed downward, it is difficult for the back blade to be damaged by pebbles, but if the back blade is downward, the front blade is worn out and shortened, and the depth is reduced. By polishing only the lower surface of the blade, the front edge of the back blade can be retracted to regain the depth. If you work on this substrate with a back blade at an appropriate speed, the lawn is flexible and the skin is hard, so the lawn in front of the front blade is pushed down without being cut, and the entanglement with the lawn in front of the adjacent back blade comes off. The grass in front of the back blade makes it easier to touch the back blade,
Weeds such as thick and hard stems and broad leaves are also caught between the protrusions, and those that float up are mowed by the back blade that follows the exposed roots later. Further, in this substrate, the front blade repels a solid material larger than the space between the protrusions, so that the back blade is protected, and if the shallow layer digs into the soil, the back blade is less likely to be damaged. These substrates with back blades are not limited to flat plates, but it is also preferable to form arc-shaped or spiral curved sections.
The length of the lawn needs to be adjusted according to the type and growth of weeds. Then, the cutting height of the substrate with the back blade is performed by adjusting the height of the weeding rotary body or the support shaft of the weeding rotary body from the ground, and supports the prime mover, for example, the motor and the weeding rotary body. The height of the supporting body can be adjusted so that it can be provided on the carriage, but since the structure becomes complicated, it is preferable to make the height of the wheels of the chassis adjustable. In addition, it is desirable to be able to adjust the cutting speed of the board with the back blade according to the hardness of the lawn or weed, the sharpness of the cutting blade, etc. depending on the season. If the above-mentioned substrate with a back blade is provided in the weeding rotary member in a multiple of 2, the position of one of the two adjacent protrusions of those substrates at the time of rotation is the position of the other back blade at the time of rotation. If the width of the back blade is wider than the width of the front blade, it is also provided on the weeding rotary body, and the sharp back blade with no gap will expose the predetermined ground height, and there will be no uncut residue. It is desirable to attach it so that the whole cutting surface can be exposed with the back blade. When the above-mentioned back blade is formed only on the front part of the substrate, it is always operated in the normal rotation state, and its main function is to selectively mow weeds in the lawn. However, if the rear blade is also formed in the rear part, the same work can be performed by reversing, and in addition, in any forward or reverse rotation of the work, the rear part at the time of rotation removes the grass stuck to the rear blade from the opposite direction. The action of rubbing on the grass surface occurs.
As described above, in a device that rotates in both forward and reverse directions, the work may be performed by changing the front and rear of the vehicle body, and the collection of the object is in two front and back directions. If a space is provided, a grass cutter is provided below the space, and a prime mover is provided above the space, and a grass collecting tool communicating with the space is provided at the front and rear, the grass is collected in the grass collecting tool in the direction opposite to the rotation direction. It is easy to do continuous work, and if these grass collecting tools are detachably constructed and attached, the cutting grass can be treated quickly, cleaning is easy, and both the action of weeding and mowing in the lawn can be obtained during operation. You can also mow the lawn at high speed. Furthermore, self-propelled,
Alternatively, towing, in addition to being remotely operated, or referring to a motor, it will be appreciated that other prime movers such as internal combustion engines may be used.

[0005]

1 to 6, a plate material for a blade such as a steel plate or a stainless steel plate is mainly used as a material, and the front blades 4 are arranged in parallel and have a predetermined width such that the front edges are substantially opposed to each other in the traveling direction. And a plurality of protrusions 3 formed with a depth of about 30% or more and about 200% or less of the dimension between the protrusions 3, and the deepest portion of the sharp inner blade 5 is provided, and the inner blade 5 is It is formed opposite to the traveling direction. In FIGS. 1 and 2, the front edge of the projection is slightly arcuate and the substrate is curved inward. Further, the front blade is formed upward and the back blade is formed downward. In FIGS. 3 and 4, a mounting plate 6 is provided on a substrate bent at the center, and is fixed integrally with a support tool 23 provided on a support shaft 24 of the weeding rotor 10 via the mounting plate 6. However, the rotation phases of the protrusions of one of the two deep bladed substrates and the other deep bladed substrate are aligned (see α and β in FIG. 5), and This is an arrangement of the back blades that exposes the rotating surface of the back blade substrate with almost no gap, and the rear edge of this back blade substrate is formed into a curved surface subordinate to the broken line of the small circle in FIG. If it is attached like this, when it is rotated in the direction of the arrow, it does not collide with the weeding tool elastically and slightly contacted. As an example of the above-mentioned board 2 with a back blade, when the back blade and the projection width are 6 mm and the deepest part of the back blade is formed with a depth of 5 mm, when weeding mainly weeded clover, It is desirable that the weeding substrate provided on the outer periphery of the weeding rotary member be variable at a speed of 4 to 13 rice per second so as to be reversible. If the speed is 7 to 8 rice per second, the lawn will be scarcely damaged during the period when it is a new and relatively sharp blade, even when the epidermis of the lawn in late autumn is relatively hard.
You can mow the lawn about 5 cm long. Therefore, if the lawn is about 5 cm, it is easier to be repelled, and even if the working speed of the weeding substrate is set within the range of 10 to 13 rice per second, weeding may be possible without causing fatal damage to the lawn. , In spring, the lawn's epidermis is soft and may damage the lawn unless the speed is reduced to about 4 to 7 rice per second. Therefore, the sharpness of the blade, the season, the type of grass, the length,
Since it is a complex and uncalculable element such as humidity of the atmosphere or lawn, water content, etc., it is desirable to be able to adjust to the most suitable working speed in the field, and if the prime mover is a motor, continuously variable shifting by the motor controller is desirable . A lawn mower provided with the above-mentioned board with a back blade will be described with reference to the drawings. The lawn mower 1 for both front and rear speed control type lawn mowers is provided with side plates 39 on both sides of which peripheral edges are bent at a constant width to form a peripheral edge. The weeding rotator 10 and then the front and rear wheels 37 are provided again, the support shaft 24 of the weeding rotator 10 penetrates the side plate 39, and the large pulley 21 is fitted on the outer side, and the motor partition 38 is located directly above. The shaft end of the motor 13 inside protrudes through the side plate, the small pulley 22 is fitted, and the large and small pulleys are connected by the belt 20 (Fig. 10). A speed controller is connected to the motor.
Also, a handle holder 12 is provided directly below the large pulley 21.
The lower end of the is supported so as to be rotatable by a predetermined angle, but if the handle is rotated in the opposite direction, it can be held at the position indicated by the chain double-dashed line and can move backward (FIG. 10). The weeding substrate is provided with back blades on both front and rear edges. Further, between the side plates, a shelf 36 is provided up to the end except for the central portion in the middle stage, and in the central portion, below the motor partition wall 38, the wind blower 16 is provided on the upper surfaces of both inner ends of the shelf. A rotating portion is attached, and a rotating end edge portion of the wind cutting tool 16 is supported on an upper part of the grass weeding tool 25 provided in the center. Therefore, when the wind force of the weeding rotor 10 causes the wind cutting tool 16 to rotate upward, the wind cutting tool 16 on the opposite side has a negative pressure on the lower side, and the wind pressure on the upper side is directed downward.
It is pressed against the upper surface of the weeding tool 25 (9th, 10th).
Figure). Furthermore, the back blade rotates on the same circumference both front and back.
Thus, when the weeding rotary member 10 rotates in the direction of the large arrow at a predetermined speed, the wind cutter 16 pushed by the wind force from below rotates upward and comes into pressure contact with the lower portion of the motor partition wall 38, on the opposite side. The grass is blown off by wind force above the wind cutting tool 16 and jumps into the grass collecting tool in the direction of the small arrow. At this time, if the handle 11 is pushed in the direction of the arrow, the grass in the lawn can be mowed, and at the same time, the rear blade on the rear side is weeded by the lawn. Further, if the weeding rotary body is used for reverse rotation, the vehicle body can also be moved in the opposite direction to perform grass cutting work, but the back blade on the opposite side of the weeding substrate will perform grass cutting. Even in this reverse work, the back blade rotates on the same circle around the front and rear, and the position of the motor is in the center, so the balance is good. The weeding tool 25 described above has an arc-shaped cross section, and spring stands 42 are fixed to the upper portions of both side ends, and the spring stands 4 are attached to the slide cases 41 provided on the inner walls of both side plates.
2 fixed part is inserted and coil spring 4 from above
It is pressed to the lower end elastically at 0 (Figs. 10 and 11).
Therefore, the weeding tool 25 is elastically in contact with the backing board 2 (Figs. 9, 10, 11). In the lawn mower 1 in the lawn of this example, both ends of the axle 32 are fixed below the left and right adjusters 26 made of a metal plate in order to adjust the cutting height with the front and rear wheels 37. An adjusting shaft 31 is penetrated below the end, and one end is fixed to the inner wall of the side plate 39. A slide groove 30 is opened upward from the central portion of the adjusting tool 26.
When the locking tool 29, which is configured to be slidable along 0, is located at the uppermost position (see FIG. 13), the adjusting tool 26 rotates the adjusting opening 27 from the upper end to the lower end, with the adjusting shaft 31 as the center. The adjusting tool 26 is freely placed at an appropriate position, for example, the middle stage (12th
To move to the uppermost stage from the figure), slide the locking tool 29 upward to rotate the adjusting tool 26 above the locking groove 28,
Of the three steps, it may be slid downward in accordance with the uppermost locking groove 28 (FIG. 14). At this time, the front and rear wheels 37 are lifted higher by the amount of pulling up the axle 32, and the height is set at that position. Since the adjusting tool 26 can be fixed to any of the three-stage locking grooves 28 by the above-described operation, the cutting height of the mowing machine in the lawn of this example can be set to three steps. In addition, it is preferable to apply a return pressure downward to the locking tool via an elastic body because it is easy to operate. The slide type adjusting device of the above-mentioned example has a simple structure and can be applied to the operation of a single wheel, and it is also preferable that a pipe is used as a locking tool so that the adjusting tool is penetrated. In addition, there are many means for changing the cutting height, such as changing the height of the substrate from the ground by changing the position of the fixture attached to the support in the above-described example. Shown in FIG. 1 is one embodiment of a substrate with a back blade, in which the front blade forms a curved edge at the corner on one side and is continuous with the back blade, and the front edge of the front blade is slightlyゝ Although it is inclined at an angle, it has a back blade that is effective for cutting, and has a considerable effect of repelling obstacles, hooking grass, and pushing down the lawn, so the lawn is not cut in the lawn By adjusting to a higher speed, weeds that are softer than turf can be cut faster. Further, in FIG. 20 and FIG. 21, four blade-equipped substrates 2 curved in a spiral shape are fixed to a support tool 23 at equal intervals on the outer periphery of the weeding rotary member 10. The front blade and the back blade described above are provided, and the substrate with the back blade described above is merely curved,
Further, a mower provided with a substrate with a back blade formed by forming a front blade and a back blade as described above on a screwed substrate is also included in the present invention. The above-described embodiment illustrated in the drawings is a preferable example, that is, the main purpose of the present invention is to connect the tips of a large number of front blades with a series of smooth curved lines or straight lines, and the inner side of the line. The blade of No. 1 is regarded as a back blade even if it is a triangular blade slanted to the inner side (although the weeding action in the grass is inferior to that in the example), the weeding rotary body provided with the back blade-equipped substrate equipped with the back blade. In order to increase the mowing speed, the rotation speed of is adjusted so that it is raised to the limit just before the lawn mowing, and the lawn is used to scrape the lawn or hook the foliage of the grass, or stick it into a broad leaf and move upwards. It is to pull up the roots and lift the roots so that weeds that are softer than turf can be cut with the back blade (also referred to as rear blade or side blade), but the same weeding conditions (growth, season, humidity, etc.) depending on the shape of the blade. ) But the highest mowing rotation speed of the weeding rotor is different Defining a range of rotational speeds which can be selected in the device is to adjustably configured in a predetermined rotational speed. When mowing grass at a rotation speed higher than a predetermined value, the grass cutting action of the substrate with the back blade of the present invention including the triangular blade is more efficient than that of the flat blade.

[0006]

As described above, the lawn mower in the speed-controlled lawn of the present invention forms the depth of the back blade of the substrate with the back blade within the range of 30 to 200% of the dimension between the protrusions. Since the solid blade is flipped, the back blade is less likely to be damaged, and the protrusions pierce or extend the broad grass leaves to catch the floating roots and lift them further to cut off with the back blade. With many projections whose front edges are almost opposite to each other in the direction of travel, the entanglement of the grass that is long and dense at a predetermined low speed is unraveled so that the weeds can easily touch the back blades directly, so weeds are effectively left behind. It can be done well, grass can be mowed at high speed, and if the front blade is facing upward and the back blade is facing downward, in addition to polishing the front and back blades only by polishing the bottom surface, the depth of the back blade is increased. The position of the blade can be adjusted to some extent. Further, by forming the back blades on the front and rear sides of the weeding substrate so that it can be operated in both forward and reverse rotations, the front back blades can weed and the rear back blades can weed. Furthermore, if a motor is placed above the center of the weeding rotary body, the functions in both the front and rear directions can be made the same, so weeding can be done regardless of whether it is connected to the car or it is self-propelled, If the work speed of the board with the back blade can be set to an appropriate value, the desired maximum rotation speed can be selected according to the work environment such as season, growth rate, dryness and humidity. The weeding work can be carried out promptly, sufficiently and smoothly.
Furthermore, since the back blade of the board with back blade repels a large solid material, the sharpness can be maintained for a long time, so that the effect of cutting grass at the same time at a high speed rotation of about 15 US / sec or more continues for a long time.

BRIEF DESCRIPTION OF THE DRAWINGS The drawing is a reduced schematic view of one embodiment according to the invention,

FIG. 1 is a partial plan view of a preferred example of a substrate with a back blade,

2 is a cross-sectional view taken along one-dot chain line a -.- a 'in FIG. 1,

FIG. 3 is a plan view in which a mounting plate is fixed to a preferred example of a board with a back blade,

4 is a cross-sectional view taken along alternate long and short dash line b -.- b 'in FIG. 3,

FIG. 5 is a front view of an example of a weeding rotary member,

6 is a side view of the weeding rotor of FIG. 4,

FIG. 7 is a reduced front view of an example of a front-rear type of a mower in a lawn,

8 is a side view of the example of FIG. 7,

9 is an enlarged view of the main body part of FIG. 7,

10 is a perspective view of FIG. 9,

11 is a perspective view of an example of the weeding tool elastically contacting the weeding substrate, which is included in FIG. 10, FIG. 12 to FIG.
4 is a partial sectional view for explaining the wheel height adjusting structure,

FIG. 12 is a state diagram of the height of the second stage,

[Fig. 13] An intermediate view of adjusting to the height of the third step,

FIG. 14: Completion drawing of adjustment to the third step height,

FIG. 15 is a perspective view of a rotary lawn mower provided with a substrate with a back blade,

16 is a bottom view of FIG.

FIG. 17 is an enlarged partial plan view of another embodiment of a substrate with a back blade,

FIG. 18 is a section a--a ′ of FIG.

FIG. 19 is a section b--b ′ of FIG.

FIG. 20 is a front view of an example of a weeding rotary member to which a screw-shaped substrate with a back blade is attached,

FIG. 21 is a left side view of the weeding rotary member shown in FIG. 20.

[Explanation of symbols] 1 Lawn mower in a speed-controlled lawn 2 Board with back blade
3 Protrusion 4 Front blade 5 Back blade
6 Fixture 7 Fixing Hole 8 Bolt 10 Weeding Rotator 11 Handle
12 Handle holder 13 Motor 14 Belt cover 1
5 Grass collecting tool 16 Wind cutting tool 17 Switch
18 front wheel 19 rear wheel 20 belt
21 large pulley 22 small pulley 23 support
24 Support Shaft 25 Weeding Tool 26 Adjusting Tool
27 Adjusting Port 28 Locking Groove 29 Locking Tool
30 Slide port 31 Adjusting shaft 32 Axle
33 Adjustment Wheel 34 Engagement Plate 35 Connection Plate
36 shelves 37 front and rear wheels 38 motor bulkhead 3
9 Side plate 40 Coil spring 41 Sliding case
42 spring stand

[Procedure amendment]

[Submission date] January 27, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

[Title of Invention] Mower for speed control type lawn

[Claims]

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lawn mower which drives a weeding rotary body provided with a plurality of substrates with back blades provided between a plurality of protrusions by a prime mover, and weeds including lawn at high rotation. The grass is cut in the grass and the grass is left in the grass to cut softer weeds than the grass. It also aims to prevent pesticide pollution from herbicide spraying at golf courses and gardens.

[0002]

2. Description of the Related Art Conventionally, as a lawn mower for driving a rotating body having a back blade substrate provided with a back blade between a large number of projections and driving a rotary body, the soft grass in the lawn is selectively cut without cutting the lawn. There was a proposal by Masaru Tsuda, the inventor of Japanese Patent Application No. 301029 in 1988 as a cutting device. However, the working speed is
When setting the speed so that the lawn is not cut, if the work rotation is performed only in the same direction, the weeds will be cut while the grass fragments that are rarely torn and fragments of the hard outer skin of the weeds stick to the cutting blade. On the other hand, the lawn does not directly hit the cutting blade by being repelled or slipping even if the lawn hits the grass on the front edge, grass, etc., and the stickiness tends to increase over time, However, the only way to do this is to interrupt the work and perform the weeding work on the weeding substrate or the weeding rotary member, or to provide a weeding tool. As a similar device, there are lawn mowers and mowers, but those of the reel type do not have a function to selectively mow grass softer than the lawn, not a weeding plate such as providing a back blade between many projections,
Although it is not the same kind of device, in short, there is no specific proposal to remove or attach a plurality of grass cutting boards from the weeding rotary body at the same time, or to remove the tangled grass during the mowing rotation, and there was no need for it. This is because the grass is usually the thinnest and softest of the grass, but the skin is hard and difficult to mow, so at the position where the fixed blade and the rotary blade are slid together, cutting between the two blades and sticking to the leading edge of the blade at the same time. This is because the action of scraping off the weeds and lawns that are present occurs, and since the action continues during the work rotation, sticking and entanglement were negligible during the sharp practical use of the cutting blade. As an example somewhat similar to the blade type of the weeding substrate used in the present invention, a hedge trimmer is mainly used for pruning a tree, and a small one is used for mowing a small area. The method of use is to fix the lower stage of the upper and lower two mowing boards and repeat the reciprocating movement only at the upper stage at right angles to the direction of movement of the mowing plate, but form both sides of the inner and inner sides of the protrusion into side blades, The foliage that has entered between the projections is cut by the side blades of the upper and lower grass cutting plates, and the back blade facing the direction of travel does not cut the foliage alone. Further, in the traveling direction, since it is only the speed of shaking by hand to the left and right, the cutting force is not applied to the foliage at a considerable speed in front of the back blade at a speed of 4 rice per second or more. For example, it is not possible to selectively mow only weeds that are softer than the lawn in the lawn, even if the hedge trimmer is driven at high speed or low speed. That is, P
The CT / JP, 89/01206 device and the speed control type lawn mower of the present invention are functional, effective, effective, and objectively effective in comparison with any other mowers, lawn mowers or hedge trimmers. However, there is no overall commonality.

[0003]

The problems to be solved are to clarify the depth of the back blade for removing weeds in the lawn, and to leave uncut areas on the surface of the intermittent back blades. To prevent this from happening, shift the rotational phase of the back blades of multiple boards with back blades, perform weeding and weeding at the same time, and set the required work speed depending on the season of the weeding board, humidity, lawn length, etc. This is a forming method in which the same function is exhibited in both front and rear directions, automation is advantageous, and the depth of the back blade is kept constant even during polishing. At the same time, the lawn should be cut along with the grass at high speed.

[0004]

According to the present invention, the depth of the back blade is limited to a fixed range, and in a place where almost no solid matter such as pebbles exists, the front blade is directed upward and the back blade is directed downward. Multiple back blades are provided on both the front and rear edges of the weeding board, the prime mover is placed above the weeding rotary body to maintain the balance with grass collection in both front and back directions, and weeding work and weeding are performed by both forward and reverse rotations. The weeding work speed of the weeding substrate is set to an appropriate value in the range of 4 to 13 rice per second, or is settable. In addition, the inner blade is also formed upwards to improve solid matter and speed 1 second.
The present invention relates to a mower having a board with a back blade that can be adjusted to a speed of 5 rice or more and also cuts lawns. More specifically, steel plates,
A plate material for cutlery such as a stainless steel plate is mainly used as a material, and in order to selectively mow the weeds in the lawn, the front blades are formed in parallel and the front edges are substantially opposed to each other in the traveling direction and have a predetermined width. A plurality of protrusions, and even if narrow between the protrusions, the front blade is mainly located at a width not less than the thickness of the roots to be mowed and at a shallow position that does not focus the lawn forward, and at least at a position deeper than half the protrusion interval. The weeding rotor is connected to a prime mover provided on a vehicle body that rotatably supports a weeding rotor having a plurality of substrates with back blades provided with opposing sharp blades facing each other in the traveling direction. The support shaft can be adjusted to a predetermined height above the ground, and in the place where there are few large solid objects, side blades can be formed to cut the weeds and the front blade can also soften the weeds for faster work speed. , Leveling the raised part of the ground Is preferably benefit, further adjustment of the rotational speed of the herbicide rotator relates mower is proceeding effectively. Therefore, the front edge of many projections is formed into a sturdy front blade, the back blade is sharper than the front blade, and the lawn foliage is formed at a shallow position where it does not form a bundle in front of the back blade between the projections.
Although it is easy to mow it by touching the back blade directly with the weeds, if it is too shallow, the effect of untangling the lawn will be reduced, it will be easily damaged, and inconveniences such as the fact that the thick target stem cannot be floated will occur. Within 200% of interval and 30%
It is preferable to provide it at a certain depth. This is because most of the solid objects larger than the protrusion interval do not directly hit or damage the inner blade located deeper than the radius.
Furthermore, if the front blade is facing upward and the back blade is facing downward, the back blade is less likely to be damaged by pebbles, but if the back blade is facing downward,
The front edge of the back blade can be retracted to regain the depth by polishing only the lower surface of the back blade, which became shallow due to the front blade being worn and shortened. If you work on this board with back blade at an appropriate speed, the lawn is flexible and the skin is hard, so the lawn in front of the front blade is pushed down without being cut, and the entanglement with the lawn in front of the adjacent back blade will come off. The grass in front of the back blade can be easily touched by the back blade, and weeds such as thick and hard stems and broad leaves are also caught between the protrusions, and the raised ones show the exposed roots from behind. Mowed by the board with a back blade that follows. Further, in this substrate, the front blade repels a solid material larger than the space between the protrusions, so that the back blade is protected, and if the shallow layer digs into the soil, the back blade is less likely to be damaged.
The substrate with a back blade is not limited to a flat plate shape, and it is also preferable to form it into a curved surface having an arc shape or a spiral shape in cross section. However, it is necessary to adjust the height depending on the length of the lawn, the type of weed, and the growth level. In the present invention, the cutting height of the substrate with the back blade is performed by adjusting the weeding rotary body or the height of the support axis of the weeding rotary body from the ground, and supports the prime mover, for example, the motor and the weeding rotary body. It is possible to adjust the height of the supporting body to be adjustable on the carriage, but it is preferable to make the height of the wheels of the chassis adjustable because the structure becomes complicated. In addition, it is desirable to be able to adjust the cutting speed of the board with the back blade according to the hardness of the lawn or weed, the sharpness of the cutting blade, etc. depending on the season. If the above-mentioned substrate with a back blade is provided in the weeding rotary member in a multiple of 2, the position of one of the two adjacent protrusions of those substrates at the time of rotation is the position of the other back blade at the time of rotation. If the width of the back blade is wider than the width of the front blade, it is also provided on the weeding rotary body, and the sharp back blade with no gap will expose the predetermined ground height, and there will be no uncut residue. It is desirable to attach it so that the whole cutting surface can be exposed with the back blade. When the above-mentioned back blade is formed only on the front edge of the substrate, it is always operated in the normal rotation state, and the main action is to selectively weed the grass. However, if a rear blade is also formed on the trailing edge, the same work can be performed by reversing, and in addition, in both forward and reverse work rotation,
The effect is that the trailing edge of the rotation will rub against the grass so that the grass stuck to the back blade is removed from the opposite direction. As described above, in the device using both forward and reverse rotations,
Since the work may be performed by changing the front and rear of the vehicle body, and the collection of the object is performed in the two front and rear directions, a grass cutting space is provided above the weeding rotary member, and a grass cutter is provided below the space. If a prime mover is installed above and grass weeding tools that communicate with the space are provided at the front and rear, the grass weeds will be gathered in the grass weeding tool in the direction opposite to the direction of rotation, making it easy to carry out continuous work. If it is constructed and installed, it can process the grass quickly, is easy to clean, and has the effects of weeding and mowing the grass during operation. You can also mow the lawn at high speed. In addition, self-propelled or towed, in addition to remote control, motors have been cited, but obviously other prime movers such as internal combustion engines may be used.

[0005]

1 to 6, a blade plate material for a blade such as a steel plate or a stainless steel plate is mainly used as a material, and the front blades 4 are arranged in parallel and have a predetermined width such that the front edges are substantially opposed to each other in the traveling direction. A plurality of projections 3 formed with a plurality of projections 3 and a width between the projections 3 which is narrower than the thickness of the roots to be mowed, but at least about 30% or more and about 200% or less of the dimension between the projections With the deepest part of the sharp back blade 5 at the depth of
Are formed to face each other in the traveling direction. In FIGS. 1 and 2, the front edge of the projection is slightly arcuate and the substrate is curved inward. Further, the front blade is formed upward and the back blade is formed downward. In FIGS. 3 and 4, a mounting plate 6 is provided on a substrate bent at the center, and a support shaft 24 of the weeding rotor 10 is provided through the mounting plate 6.
It is fixed integrally with the support tool 23 provided in, but the rotation phases of the protrusions of one back blade of the two backing boards and the other backing board are aligned (α in FIG. 5, (See β), which is the arrangement of the back blade that exposes the rotating surface of the back blade substrate on the outer periphery of the rotating body with almost no gap, and the rear edge of this back blade substrate is indicated by the broken line of the small circle in FIG. If it is formed in a secondary curved surface and attached as shown in the figure, when it is rotated in the direction of the arrow, it does not collide elastically and slightly with the weeding tool that is in slight contact. As an example of the above-mentioned board 2 with a back blade, when the back blade and the projection width are 6 mm and the deepest part of the back blade is formed with a depth of 5 mm, when weeding mainly weeded clover, It is desirable that the weeding substrate provided on the outer periphery of the weeding rotary member be variable at a speed of 4 to 13 rice per second so as to be reversible. If the speed is 7-8 US / s,
Within the period of being a new and relatively sharp blade, even when the grass of the lawn in late autumn is relatively hard, the lawn can be cut approximately 15 cm long with little damage to the lawn. Therefore, if the lawn is about 5 cm, it is easier to be repelled, and even if the working speed of the weeding substrate is set within the range of 10 to 13 rice per second, weeding may be possible without causing fatal damage to the lawn. , In spring, the lawn's epidermis is soft and may damage the lawn unless the speed is reduced to about 4 to 7 rice per second. Because of that, the sharpness of the blade,
Since it is a complex and uncalculable factor such as season, type of grass, length, humidity of the atmosphere and grass, moisture content, etc., it is important to be able to adjust to the most suitable working speed on site, especially for the rotation of the motor. It is preferable to add a control device. A lawn mower provided with the above-mentioned board with a back blade will be described with reference to the drawings. The lawn mower 1 for both front and rear speed control type lawn mowers is provided with side plates 39 on both sides of which peripheral edges are bent at a constant width to form a peripheral edge. The weeding rotator 10 and then the front and rear wheels 37 are provided again, the support shaft 24 of the weeding rotator 10 penetrates the side plate 39, and the large pulley 21 is fitted on the outer side, and the motor partition 38 is located directly above. The shaft end of the motor 13 inside protrudes through the side plate, the small pulley 22 is fitted, and the large and small pulleys are connected by the belt 20 (Fig. 10). A speed controller is connected to the motor.
Also, a handle holder 12 is provided directly below the large pulley 21.
The lower end of the is supported so as to be rotatable by a predetermined angle, but if the handle is rotated in the opposite direction, it can be held at the position indicated by the chain double-dashed line and can move backward (FIG. 10). The weeding substrate is provided with back blades on both front and rear edges. Further, between the side plates, a shelf 36 is provided up to the end except for the central portion in the middle stage, and in the central portion, below the motor partition wall 38, the wind blower 16 is provided on the upper surfaces of both inner ends of the shelf. A rotating portion is attached, and a rotating end edge portion of the wind cutting tool 16 is supported on an upper part of the grass weeding tool 25 provided in the center. Therefore, when the wind force of the weeding rotor 10 causes the wind cutting tool 16 to rotate upward, the wind cutting tool 16 on the opposite side has a negative pressure on the lower side, and the wind pressure on the upper side is directed downward.
It is pressed against the upper surface of the weeding tool 25 (9th, 10th).
Figure). Furthermore, the back blade rotates on the same circumference both front and back.
Thus, when the weeding rotator 10 rotates in the direction of the large arrow, the wind cutter 16 pushed from below by the wind force rotates upward and comes into pressure contact with the lower portion of the motor partition 38, and the wind cutter on the opposite side. The grass is blown off by the wind above 16 and jumps into the grass collecting tool in the direction of the small arrow. At this time, if the handle 11 is pushed in the direction of the arrow, the grass in the lawn can be mowed, and at the same time, the rear blade of the trailing edge is weeded by the lawn. Further, if the weeding rotary body is used for reverse rotation, the vehicle body can also be moved in the opposite direction to perform grass cutting work, but the back blade on the opposite side of the weeding substrate will perform grass cutting. Even in this reverse work, the back blade rotates on the same circle around the front and rear, and the position of the motor is in the center, so the balance is good. The weeding tool 25 described above has an arc-shaped cross section, spring stands 42 are fixed to upper portions of both side ends, and fixed portions of the spring stands 42 are inserted into slide cases 41 provided on inner walls of both side plates. The lower end is elastically pressed by the coil spring 40 (FIGS. 10 and 11). Therefore,
The weeding tool 25 elastically contacts the substrate 2 with the back blade (FIGS. 9, 10, and 11). The mower 1 in the lawn of this example
In order to adjust the cutting height with the front and rear wheels 37, both ends of the axle 32 are fixed below the left and right adjusters 26 made of a metal plate, and the adjustment shaft 31 does not penetrate below these axle ends. In addition, one end is fixed to the inner wall of the side plate 39. When the slide groove 30 is opened upward from the central portion of the adjusting tool 26 and the locking tool 29 configured to be slidable along the slide groove 30 is located at the uppermost position (first 13), the adjusting tool 26 is rotatable about the adjusting shaft 31 from the upper end to the lower end of the adjusting port 27, and the adjusting tool 26 is moved to an appropriate position, for example, from the middle stage (FIG. 12) to the uppermost stage. In order to transfer, the locking tool 29 is slid upward, the adjusting tool 26 is rotated above the locking groove 28, and the adjusting tool 26 is slid downward in alignment with the uppermost locking groove 28 of the three steps. It should be good (Fig. 14). At this time, the front and rear wheels 37
Is lifted higher by the amount by which the axle 32 is pulled up, and the height is set at that position. Since the adjusting tool 26 can be fixed to any of the three-stage locking grooves 28 by the above-described operation, the cutting height of the mowing machine in the lawn of this example can be set to three steps. In addition, through the elastic body to the locking tool,
It is preferable to apply a returning pressure downward so that the operation is easy. The slide type adjusting device of the above-mentioned example has a simple structure and can be applied to the operation of a single wheel, and it is also preferable that a pipe is used as a locking tool so that the adjusting tool is penetrated. It should be noted that FIG. 17 to FIG. 19 show one embodiment of a substrate with a back blade, in which the front blade forms a curved edge at the corner on one side and is continuous with the back blade, The front edge of the front blade is slightly inclined, but since it has a back blade that is effective for cutting, it has a slight effect of repelling obstacles, grass, and pushing down the lawn. Mow softer weeds, leaving the lawn in the lawn. Further, in FIG. 20 and FIG. 21, the weeding rotary body 10
Four substrates 2 with a back blade that are curved in a spiral shape are fixed to the support tool 23 at equal intervals on the outer periphery of the substrate. The front blade and the back blade described above are provided on the substrate, and The above-mentioned substrate with a back blade is only a curved one, and the lawn mower having a reel-type screw-turned blade also has a front blade and a back blade as described above. It is included in the present invention.

[0006]

As described above, the lawn mower in the speed-controlled lawn of the present invention forms the depth of the back blade of the substrate with the back blade within the range of 30 to 200% of the dimension between the protrusions. The back blade is hard to damage with a solid object, the thick weed stalks are hooked between the protruding pieces to float the roots, and many protrusions whose front edges are parallel to each other in the traveling direction parallel to the lawn at low speed. Unraveling makes it easier to touch the weeds directly to the rear blades, so weeds can be left behind without leaving the lawn, the lawn can be cut at high speed, and if the front blade is upward and the rear blade is downward, In addition to sharpening the front and back blades only by polishing, the depth position of the back blade can be adjusted to some extent. Further, since the back blades are formed on the front and rear edges of the weeding substrate and can be operated in both forward and reverse rotations, the back blade on the front edge side can weed and the back blade on the rear edge side can weed. Furthermore,
By arranging a motor above the center of the weeding rotor, the functions in both front and rear directions can be made the same, so weeding can be done regardless of front or back even if it is connected to a car or it is self-propelled If you can set the work speed of the board with the back blade to an appropriate value, you can select the desired rotation speed according to the work environment such as season, growth rate, dryness and humidity, and speed up the weeding work. It can be performed sufficiently and smoothly. Furthermore, the lawn can be simultaneously mowed at a high rotation speed of about 15 rice per second or more.

BRIEF DESCRIPTION OF THE DRAWINGS The drawing is a reduced schematic view of one embodiment according to the invention,

FIG. 1 is a partial plan view of a preferred example of a substrate with a back blade,

2 is a cross-sectional view taken along one-dot chain line a -.- a 'in FIG. 1,

FIG. 3 is a plan view in which a mounting plate is fixed to a preferred example of a board with a back blade,

4 is a cross-sectional view taken along alternate long and short dash line b -.- b 'in FIG. 3,

FIG. 5 is a front view of an example of a weeding rotary member,

6 is a side view of the weeding rotor of FIG. 4,

FIG. 7 is a reduced front view of an example of a front-rear type of a mower in a lawn,

8 is a side view of the example of FIG. 7,

9 is an enlarged view of the main body part of FIG. 7,

10 is a perspective view of FIG. 9,

11 is a perspective view of an example of the weeding tool elastically contacting the weeding substrate, which is included in FIG. 10, FIG. 12 to FIG.
4 is a partial sectional view for explaining the wheel height adjusting structure,

FIG. 12 is a state diagram of the height of the second stage,

[Fig. 13] An intermediate view of adjusting to the height of the third step,

FIG. 14: Completion drawing of adjustment to the third step height,

FIG. 15 is a perspective view of a rotary lawn mower provided with a substrate with a back blade,

16 is a bottom view of FIG.

FIG. 17 is an enlarged partial plan view of another embodiment of a substrate with a back blade,

FIG. 18 is a sectional view of FIG.

FIG. 19 is a sectional view of FIG.

FIG. 20 is a front view of an example of a weeding rotary member to which a screw-shaped substrate with a back blade is attached,

FIG. 21 is a left side view of the weeding rotary member shown in FIG. 20.

[Explanation of symbols] 1 Lawn mower in a speed-controlled lawn 2 Board with back blade
3 Protrusion 4 Front blade 5 Back blade
6 Fixture 7 Fixing Hole 8 Bolt 10 Weeding Rotator 11 Handle
12 Handle holder 13 Motor 14 Belt cover
15 Grass collecting tool 16 Wind cutting tool 17 Switch
18 front wheel 19 rear wheel 20 belt
21 large pulley 22 small pulley 23 support
24 Support Shaft 25 Weeding Tool 26 Adjusting Tool
27 Adjusting Port 28 Locking Groove 29 Locking Tool
30 Slide port 31 Adjusting shaft 32 Axle
33 Adjustment Wheel 34 Engagement Plate 35 Connection Plate
36 shelves 37 front and rear wheels 38 motor partition
39 Side plate 40 Coil spring 41 Sliding case
42 spring stand

Claims (6)

[Claims] 1. A plurality of protruding pieces which are arranged in parallel and whose front edges substantially oppose each other in a traveling direction and which form a front blade with a predetermined width,
The width is at least as large as the thickness of the roots to be mowed, even if it is narrow between the protrusions, and about 50% or more of the dimension between the protrusions, about 200.
% Of the two deep-edged blades with the deepest part of the sharp back edge are provided on the outer periphery of the weeding rotator. The support shaft of the body is configured to be adjustable up and down to a predetermined height above the ground, and the weeding progress speed of the substrate with two blades provided on the outer periphery of the weeding rotor is adjusted to an appropriate speed within the range of 4 to 13 rice per second. A lawn mower in a speed-controlled lawn equipped with a means to do. 2. The adjustment according to claim 1, wherein a support for supporting the weeding rotary body is provided with a prime mover for driving the weeding rotary body, and the height of the support is adjustable on the vehicle body. A mower in a fast lawn. 3. A substrate with two-step blades is provided with two-step blades such as a front edge part also at a rear edge part so that a weeding rotor can be reversed, and the back blades at both the front and rear edges are substantially the same. The lawn mower in the speed-controlled lawn according to claim 1 or 2, wherein the lawn mower is a rotating surface. 4. The speed governor according to claim 3, wherein a grass clippings exclusion space is provided above the weeding rotary member, a prime mover is provided above the space, and grass collecting tools communicating with the space are provided at the front and rear. A mower in a lawn. 5. The speed-control type lawn mower according to any one of claims 1 to 4, wherein the front blade is formed upward and the back blade is formed downward. 6. A plurality of protrusions which are arranged in parallel and whose front edges are substantially opposed to each other in the traveling direction and which form a front blade with a predetermined width,
The width is at least as large as the thickness of the roots to be mowed, even if it is narrow between the protrusions, and about 50% or more of the dimension between the protrusions, about 200.
The weeding rotation is connected to the prime mover mounted on the vehicle body that rotatably supports the weeding rotator, which has a plurality of two-step bladed substrates with the deepest part of the sharp backed blade at a depth of less than 1% A lawn mower in which the body support shaft can be adjusted up and down to a predetermined height above the ground.