JP3254403B2 - Boom type work machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a boom-type operation, and more particularly, to an installation of a pipe member to a fluid cylinder constituting the working machine.

[0002]

2. Description of the Related Art A base of a boom having a working tool (bucket) at its tip is provided on a traveling vehicle body so as to be able to move up and down, and a fluid cylinder for the working tool and the boom is provided. Boom-type implements provided along the longitudinal direction, such as front loaders, are known.

FIG. 10 shows a piping member of this loader.
(1) The configuration shown in (2). FIG. 10 (1) (2)
In a pair of left and right booms 1, bases 1A thereof are mounted on a traveling vehicle body (tractor) so as to be able to move up and down, and a pair of left and right booms 1 is formed by a pipe member at a middle portion in a longitudinal direction thereof. Four piping members 3, 4, 5, and 6 connected to each other and for two boom cylinders and one or two bucket cylinders are arranged side by side on the inner vertical surface 1B of the right boom 1. However, it is mounted along the longitudinal direction of the boom with the clamp 7, the washer 8 and the bolt 9, and is mounted along the horizontal member 2 by the clamp 7, the washer 8 and the bolt 9.

[0004]

According to the piping members 3, 4, 5, and 6 of the boom type working machine shown in FIGS. 10 (1) and 10 (2), they are mounted on the inner vertical surface 1B of the boom 1. Therefore, in addition to the width of the boom 1, the width is increased by the amount by which the piping members 3, 4, 5, and 6 are mounted, and this deteriorates visibility during work, and as a result, operability is reduced. There was one problem.

Further, since the piping members 3, 4, 5, 6 are exposed to the so-called outside, not only the appearance is poor and the commercial value is impaired, but also the sediment spilled during the loading work of the earth or the like. There is a second problem that the pipe members 3, 4, 5, 6 may collide with each other and may cause deformation of the piping members 3, 4, 5, 6, and the like. Further, in a poultry farm or the like, cages (chicken sheds) are juxtaposed with a work space, and since the work space is relatively narrow, when working in this work space and performing work with a boom type working machine. Conventionally, since the control operation means is provided on the outer portion of the mast device, the width of the vehicle is widened by the control operation means, and it is difficult to perform the traveling operation in the above-described work space. Is low.

[0006] Further, when the control operation means is provided, the area around the foot of a pedal device (clutch pedal, brake pedal, etc.) provided at the entrance of the traveling vehicle body becomes narrow, which is inconvenient for getting on and off, and also has good maneuverability. There was a fourth problem of lowering. Therefore, in the present invention, a recess along the boom longitudinal direction is formed in the lower bottom portion of the boom, and the pipe members are housed in the recess so as to be arranged side by side. , The back of the mast device (back)
Is provided with the control operation means, so that the third
It is an object of the present invention to provide a boom type working machine which has solved the four problems.

[0007]

According to the present invention, a boom 12 having a work implement 11 is provided on a traveling vehicle body 14 so as to be able to move up and down, and fluid cylinders 15 and 16 for the work implement 11 and the boom 12 are provided. The piping members 17, 18, 19, 20 for the fluid cylinders 15, 16 are connected to the boom 1
The following technical measures are taken in order to solve the first and second problems in the boom type working machine provided along the longitudinal direction of the second boom.

That is, in the boom type working machine according to the present invention, a recess 32 is formed in the lower bottom portion of the boom 12 along the boom longitudinal direction, and the pipe members 17, 1 are formed in the recess 32.
8, 19, and 20 are provided side by side, and a clamp member 33 for pressing the side-by-side pipe members 17, 18, 19, and 20 from below to clamp them is provided. .

By adopting such a configuration, the piping members 17, 18, 19, 20 are accommodated within the width of the boom 12, and the piping members 17, 18, 19, 20 do not protrude outward. However, the visibility during the operation is not deteriorated, and as a result, the maneuverability is improved and the mental burden on the driver is reduced. Also, piping member 1
7, 18, 19, and 20 are protected from falling objects from above by the boom 12, and the risk of breakage and the like is reduced.

Further, in the present invention, the boom 12 is
The upper plate part 1A includes an upper plate part 12A and side plate parts 12B, 12B connected to the upper plate part 12A and facing left and right.
The width of the left and right side plate portions 12B, 12B is larger than the width of 2A, and is formed in a saddle shape having a vertically long cross section. The lower bottom portion is provided with a band plate material 12C connecting the left and right side plate portions 12B, 12B to each other. By adopting a configuration characterized by forming a recess 32 having the band plate material 12C as a bottom, not only the rigidity of the boom 12 can be improved with the band plate material 12C, but also the boom 12 has a hollow structure. In addition to reducing the weight of the boom type working machine, the piping member 17,
The convergence of 18, 19 and 20 was also good, and the appearance was good and the commercial value could be improved.

Further, in the present invention, the piping members 17, 18, 19, 20 arranged side by side in the recess 32 are provided.
Are arranged side by side in a substantially trapezoidal shape or a substantially inverted trapezoidal shape in a cross-sectional view intersecting the longitudinal direction of the boom 12, whereby the clamp member 33 is provided.
When the pipe members 17, 18, 19, and 20 are pressed from below, the respective pipe members 17, 18, 19, and 20 can be housed in the recesses 32 by a so-called wedge action.
18, 19, and 20 were accurately and accurately positioned.

Further, in the present invention, a boom 12 having a work implement 11 is provided on a traveling vehicle body 14 so as to be able to move up and down, and a fluid cylinder 1 for the work implement 11 and the boom 12 is provided.
5 and 16, and piping members 17, 18, 19 and 20 for the fluid cylinders 15 and 16 are provided along the longitudinal direction of the boom 12, and the fluid cylinder 1 is provided.
In a boom type working machine provided with a control operation means 21 for controlling the control members 5 and 16 from a driver's seat 22, in order to solve the above-described first and second problems and the third and fourth problems, He took technical measures.

That is, in the boom type working machine according to the present invention, a recess 32 is formed in the lower bottom portion of the boom 12 along the longitudinal direction of the boom, and the pipe members 17, 1 are formed in the recess 32.
8, 19, and 20 are provided side by side, and a clamp member 33 is provided for pressing the side-by-side pipe members 17, 18, 19, and 20 from below to clamp the pipe members 17, 18, 19, and 20. It is characterized in that it is mounted on one of the rear surfaces of the left and right mast devices 13, 13 erected on the vehicle body 14 without protruding outward, and by adopting such a configuration, The control operation means 21 does not protrude outward in the lateral direction, so that the entire width of the boom type working machine does not need to be widened, and the third problem described above has been solved.

Further, in the present invention, the mast devices 13, 13 are provided with a boom 12 and a holder 28 for mounting a fluid cylinder 15 for the boom 12, and a control valve 21A of a control operating means 21 is mounted on the holder 28. By adopting a configuration characterized by being housed and provided rearward and upward, not only can the foot area including the pedal device at the entrance / exit 14A be widened, and the entry / exit can be lightened, but also the driver can take the driver's seat. 22 natural appearance (posture)
Thus, the fourth problem was solved.

In the present invention, the boom type working machine includes a front loader mounted in front of a traveling vehicle body (tractor vehicle body) and a shovel (backhoe) mounted behind the traveling vehicle body. The work implement 11 may be a mania fork or the like in addition to the bucket.
In order to solve only the first and second problems described above, the control operation means 21 is disposed outside the mast devices 13 and 13.
Of course, it may be equipped.

A pair of left and right mast devices 13, 13 is provided.
1 is provided on the right boom 12 because the pipe member 1 is provided.
7, 18, 19, and 20 are provided along the pipe member 17, 18, 19,
It is permissible to diverge 20.

[0017]

Preferred embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a side view showing an entire front loader as an example of a boom type working machine 10 according to the present invention.
1 and a pair of left and right booms 12 are provided on a traveling vehicle body 14 via a mast device 13 so as to be movable up and down, and fluid cylinders 15, 1 for the work implement 11 and the boom 12 are provided.
6 and piping members 17, 18, 19, 20 (see FIGS. 5 and 6) for the fluid cylinders 15, 16 along the longitudinal direction of the right boom 12, and the fluid cylinders 15, 16. Control operation means 21 for controlling
(See FIGS. 2 and 3) are provided on one (right side) of the left and right mast devices 13 so as to be operable from the driver's seat 22.

The traveling vehicle body 14 is constructed by connecting a transmission case 23 to the rear surface of the engine, and has a two-shaft 4 having a front wheel 24 as a pair of left and right steering wheels and a rear wheel 25 as a pair of left and right driving wheels. It is a wheel-type tractor. The left and right mast devices 13 are provided with a base 26 protruding outward from the vehicle body 14 in the vicinity of the entrance 14A at a middle part in the front-rear direction of the traveling vehicle body 14 in a horizontally extending shape, and on the upper surface of the base 26, U-shaped holder holder 2 with a front open
A holder 28 is provided on the holder receiving member 27 so as to be detachable.

That is, as shown in FIGS. 2 and 3, a horizontal shaft 27A provided between side plates of the holder receiving member 27 is
The fitting groove 28A formed in the lower part of the device is placed and fitted from above,
The lock pin 29 is detachable so as to be detachable. The base of the boom 12 is provided above the pair of left and right holders 28 so as to be vertically movable (movable up and down) by a horizontal pin 30, and the left and right booms 12 have a bent shape in a side view when the middle part is bent. A pair of left and right fluid cylinders 15 (hydraulic cylinders) for raising and lowering the boom are mounted between the lower part of the bent portion 31 and the halfway portion of the holder 28 in the height direction. 15B is a bottom pin.

The pair of left and right booms 12 is shown in FIG.
As shown in (2), it has an upper plate portion 12A and side plate portions 12B, 12B connected to the upper plate portion 12A and facing left and right, and the left and right side plate portions with respect to the width of the upper plate portion 12A. 12
B, 12B are formed in a saddle shape having a long cross section and a large width, and a band plate material 12C for connecting the left and right side plate portions 12B, 12B to each other is provided at a lower bottom portion to form the band plate material 12C.
Is formed along the longitudinal direction of the boom, and the pipe members 17, 18, 19, 20 are formed in the recess 32.
And the piping members 1 arranged side by side
There is provided a clamp 33 for pressing the 7, 18, 19, 20 from below to clamp the pipe members 17, 18, 19, 20 by screwing a bolt 35 into a nut 34 fixed to the strip 12C. Is pressed from below.

Here, the piping members 17, 18, 19, and 20 housed side by side in the recess 32 are shown in FIGS.
As shown in the figure, the pipe members 17 are arranged side by side in a substantially trapezoidal or substantially inverted trapezoidal arrangement in a cross-sectional view intersecting with the longitudinal direction of the boom 12, and when pressed from below by the clamp 33, the piping member 17.
To 20 can be positioned by a wedge action. Upper plate 1
A boom 12 having a hollow closed cross section composed of 2A, left and right side plate portions 12B, and a band plate material 12C is a first member 11 on the base side.
2 and the second member 212 on the distal end side are joined at the bent portion 31, and as shown in FIG.
The upper plate portion 12A and the left and right side plate portions 12B of the first and second members are joined to each other by a cylinder mounting bracket 36 having a saddle-shaped cross section, and the band plate material 12C is a short plate material 112C.
Are joined to each other.

The pair of left and right booms 12 are connected to each other by a horizontal member 37 made of a channel material (channel steel) slightly forward of the bent portion 31.
7, a band member 37A is fixed to the lower bottom, and a recess 38 extending in the longitudinal direction is formed in the recess 38. The recess 38 has a pipe member 1 for the fluid cylinder 16 for a bucket (work implement).
9, 20 and the other (left) boom fluid cylinder 15
The pipe parts 17 and 18 for the
And is fastened from below by bolts 35.

A bracket 39 is fixed to the center of the transverse member 37 in the longitudinal direction so as to protrude forward, and one end of the fluid cylinder 16 is pivotally supported by this bracket 39 by a pin. ) Are pivotally supported on the work implement 11 by pins. In the figure, the work implement 11
Is raised and lowered by one fluid cylinder 16, but two fluid cylinders 16 may be employed.

Each of the four pipe members 17 to 20 is made of a steel pipe, and is bent in a substantially “H” shape along the lower bottom of the bent portion 31 of the right boom 12 as shown in FIG. And a plurality of locations in the longitudinal direction of the pipe are attached by clamps 33, and each of the piping members 17 to
The base of the boom 20 is inclined rearward and downward from the lower bottom of the boom 12 and has connecting tools 17A to 20A at its free end.

The piping member 1 for the boom cylinder 15
7 and 18 have connecting members 17B and 18B for connecting piping members P1 and P2 (formed of bent pipes and connected to the top and bottom portions of the cylinder 15) to the right boom cylinder 15 in the middle thereof. The other (left side) boom 12 is housed in the lower bottom recess 32 via the horizontal member 37, and its free end is attached by a clamp 33. The free end of the piping member for the left boom cylinder 15 is attached to the free end. It has connecting tools 17C and 18C.

Piping member 1 for bucket cylinder 16
As shown in FIG. 6, reference numerals 9 and 20 denote a pipe member bent from the right boom 12 along the horizontal member 37 and having a free end connected to a top portion and a bottom portion of the bucket cylinder 16. It has connectors 19B and 20B. Referring to FIGS. 2 and 3, a control operation unit 21 is provided on the right mast device 13.

Specifically, the holder 28 has a lower half 28
B is an insertion / removal portion for the holder receiving member 27, and the upper half portion 28C is bulged inward as shown in FIG. 3 to be a mounting portion for the control valve 21A. Upper half (control valve mounting part)
Since 28C is bulged inward rather than outwardly, the width between the left and right mast devices 13 is prevented from becoming wide, and a narrow working space (space in which chicken cages are juxtaposed) is provided. However, they can run without any problems.

The control valve 21A is provided with a spool valve for switching the boom elevating and lowering, a spool valve for switching the bucket elevating (raising and lowering) and the like in the lateral direction, and is provided at the bottom 40A of the U-shaped valve holder 40. The left and right side plates 40B of the valve holder 40 are mounted on the upper half portion 28C of the holder 28.
And is fastened by bolts 41 or the like.

That is, since the control valve 21A of the control operation means 21 is mounted on the rear surface of the holder 28 so as to be inserted into the front and inclined rearward and upward, the control lever 2
The operability of operating the driver 1B from the driver's seat 22 to the front, rear, left and right is improved, the space C below the control valve 21A can be widened, and the undercarriage can be widened. In addition, the connection elbows 42A to 42G
In addition, the control valve 21A can be protected from the left and right, thereby preventing accidental intrusion of soil and the like.

As shown in FIG. 3, the connection elbows 42A to 42G have a boom-down elbow 42A and a boom-up elbow 42B arranged vertically, and a quick coupler not shown in the connection ports 17A and 18A of the piping members 17 and 18. Are connected by a flexible hose having a bucket-up, a bucket-up elbow 42C and a bucket-down elbow 42D are arranged side by side vertically for the boom.
The connection ports 19A and 20A are connected by flexible hoses having a quick coupler and the like, not shown.

Further, an inlet (supply) elbow 42E and a tank (return) elbow 42F are arranged side by side on the lower side, and the elbow 42E and a hydraulic outlet (a hydraulic device B of the tractor provided on the tractor body (FIG. 1)). Is supplied by a flexible hose having a quick coupler (not shown), and the elbow 42F is a tank made of a flexible hose having a quick coupler (not shown). (The tractor body).

Power Beyond (POWER BEYON)
D) The elbow 42G is connected to a flexible hose or the like via a quick coupler or the like (not shown) and is returned to the control valve of the hydraulic device B. 8 and 9 show the control operation means 2
1 is a second example, in which a control valve 2
The control valve 21A is housed in the valve stay 43, and the stay 43 is fastened to the side plate of the holder 28 by a bolt / nut 44 or the like.

In the second example, the operability of the control lever 21B is slightly inferior to that of the first example shown in FIGS. 2 and 3, but a sufficient space C around the foot can be secured. In addition,
8 and 9, members common to those in FIGS. 2 and 3 are denoted by the same reference numerals. In addition, in FIG. 4, reference numeral 45 indicates a stand device, which is provided on the lower bottom of the second member 212 of the boom 12 so as to be freely foldable.

[0034]

As described in detail above, according to the present invention, the obstruction caused by the piping member with respect to the fluid cylinder is reduced to improve the maneuverability, and the damage to the piping member is reduced, and the appearance is improved and the product is improved. Can increase value.

[Brief description of the drawings]

FIG. 1 is an overall side view of a boom type working machine according to the present invention.

FIG. 2 is a side view of a mast device and control operation means, which are main parts of FIG.

FIG. 3 is a front elevational view of FIG. 2;

FIG. 4 is a side view showing a mounted state of a pipe member which is a main part of FIG.

FIG. 5 is a bottom view of FIG. 4;

FIG. 6 is a bottom view of FIG. 4 showing the main part of the whole;

FIGS. 7A and 7B show the fitting of the piping member, and FIG.
Sectional view of an example, and (2) is a sectional view of a second example.

FIG. 8 is a side view showing a second example of the mast device and the control operation means which are main parts of FIG.

FIG. 9 is a plan view of a main part of FIG. 8;

FIG. 10 shows the fitting of a conventional piping member;
(1) is an overall perspective view, and (2) is a sectional view of a main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Boom type working machine 11 Work implement 12 Boom 13 Mast device 14 Running body 17, 18, 19, 20 Piping member 21 Control operation means 32 Recess 33 Clamping tool

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-8-144323 (JP, A) Japanese Utility Model Showa 55-131362 (JP, U) Japanese Utility Model Showa 49-137301 (JP, U) (58) Survey Field (Int. Cl. ⁷ , DB name) E02F 9/00 E02F 3/36

Claims (5)

(57) [Claims] 1. A boom (12) having a work implement (11).
Is provided on the traveling vehicle body (14) so as to be able to move up and down, and is provided with fluid cylinders (15) and (16) for the work implement (11) and the boom (12), and the fluid cylinder (15)
Piping member for (16) (17) (18) (19)
(20) A boom-type working machine provided along the longitudinal direction of the boom (12), A recess (32) is formed in a lower bottom portion of the boom (12) along the boom longitudinal direction. The pipe members (17), (18), (19) and (20) are housed and arranged side by side in the recess (32), and the pipe members (17), (18) and (1)
9) A boom type working machine comprising a clamp tool (33) for pressing and clamping (20) from below. 2. The boom (12) has an upper plate (12A) and side plates (12B) (12B) connected to the upper plate (12A) and facing left and right. Department (12
The width of the left and right side plate portions (12B) and (12B) is larger than the width of A), and is formed in a saddle shape having a vertically long cross section, and a band plate material ( 12C) at the lower bottom to provide the strip material (12C).
2. A boom type working machine according to claim 1, wherein a recess (32) having a bottom with C) is formed. 3. The piping members (17), (18), (19), and (20) arranged side by side in the recesses (32) are substantially trapezoidal in a cross-sectional view crossing the longitudinal direction of the boom (12). 3. The boom type working machine according to claim 1, wherein the boom type working machines are arranged side by side in a substantially inverted trapezoidal arrangement. 4. 4. A boom (12) having a work implement (11).
Is provided on the traveling vehicle body (14) so as to be able to move up and down, and is provided with fluid cylinders (15) and (16) for the work implement (11) and the boom (12), and the fluid cylinder (15)
Piping member for (16) (17) (18) (19)
(20) is provided along the longitudinal direction of the boom (12), and control operation means (21) for controlling the fluid cylinders (15) and (16) is provided so as to be operable from a driver's seat (22). A recess (32) is formed in the lower bottom of the boom (12) along the longitudinal direction of the boom, and piping members (17), (18) and (19) are formed in the recess (32). ) And (20) are arranged side by side, and the piping members (17), (18) and (1)
9) A clamping device (33) for pressing and clamping (20) from below is provided, and the control operation means (21) is further provided.
A boom type working machine characterized by being mounted on one of the rear surfaces of left and right mast devices (13) (13) standing upright on a traveling vehicle body (14) without protruding outward. 5. The mast device (13) (13) includes a boom (12) and a holder (28) for mounting a fluid cylinder (15) for the boom (12), and is controlled by a control operation means (21). The valve (21A) is connected to the holder (2
5. The boom type working machine according to claim 4, wherein said boom type working machine is housed in a rearward upward direction.