JPH104715A - Stand in rotary working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the subject stand simple in structure so) as not to hamper the attachment/detachment of an attachment working machine to/from a tool bar. SOLUTION: A stand 31 to support a working machine equipped with a rotary 1 is set up turnably between support posture A so as to project downward under the working machine and housing posture B so as to be housed longitudinally above the working machine, and also fixably, through a fixing mechanism 32, at the respective postures.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stand for a rotary working machine that supports a working machine having a rotary connected to the rear of a tractor.

[0002]

2. Description of the Related Art Conventionally, a stand provided on a working machine equipped with a rotary (rotary working machine) is disclosed in Japanese Patent Laid-Open No. 6-276.
As shown in Japanese Patent Application Publication No. 802, there is known a work machine which is attached to a tool bar provided in the left and right direction so as to be rotatable left and right. The stand can be freely switched between an upright state in which the stand protrudes downward to support the work implement and a standby posture in which the stand is stored in the left and right direction of the work implement substantially along the toolbar.

[0003]

However, since another attachment work machine such as a ridge stand is attached to the tool bar of the work machine, when the stand is stored in the left and right direction of the work machine, the stand in a standby posture is set. There is a problem that the ridges attached to the toolbar interfere with each other, making it difficult to attach and detach the ridges to and from the toolbar, and that the stand must be removed when attaching and detaching the ridges to and from the toolbar. there were.

[0004]

The stand in the rotary working machine according to the present invention for solving the above-mentioned problems is provided so that the stand of the working machine 2 provided with the rotary 1 is directed downwardly below the working machine 2. A stand 31 is attached to the projecting support posture A and a storage posture B stored in the front-rear direction above the work implement 2 so as to be pivotable back and forth, and the stand 31 is supported between the frame 9 and the stand 31. A and a fixing mechanism 32 for fixing to the storage posture B are provided.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a working machine 2 provided with a rotary 1
FIG. 2 is a side view of a rear part of the tractor 3, and the working machine 2 is attachable to the tractor 3 via a three-point link hitch 6 provided behind a driver's seat 4 in the tractor 3. When the work machine 2 is mounted on the tractor 3 as shown in FIG. 2, the work machine 2 can move up and down with respect to the tractor 3 (field) with the vertical swing of the three-point link hitch 6. The soil of the field is plowed (tiled) by the above, and the ground level of the cultivated soil is leveled by the rear cover 8 covering the upper rear part of the rotary 1.

The frame 9 of the working machine 2 is shown in FIGS.
As shown in FIG. 3 which is a plan view of a main part of the working machine 2 in the state of FIG. Arm 12, a pair of left and right support rods 13 a, 13 b projecting rearward from the arm 12 and supported in a vertically rotatable manner, and left and right support rods 13 a, 1.
Tool bar 14 connecting the rear end of 3b and extending in the left-right direction
The arm 12 has a chain case 16 at the left outer end and a side plate 1 at the right outer end.
7 are attached respectively. Then, between the chain case 16 and the side plate 17, the claw 1 for tilling is
The above-mentioned rotary 1 provided with 8 is pivotally supported.

A top mast 19 is fixed to an upper portion of the gear case 11, and an operation lever 21 is provided on the top mast 19 so as to be swingable back and forth through a lever guide 22. The operation lever 21 is connected via a link mechanism 20 to the rear cover 8 that covers the rear upper portion of the rotary 1 and is slidable back and forth, and the rear cover 8 moves back and forth by swinging the operation lever 21 back and forth. I do. In front of the rear cover 8, a main cover 23 that covers the front upper side of the rotary 1 is provided so as to be sandwiched and fixed between the chain case 16 and the side plate 17.

Further, the left and right support rods 13a,
13 b is connected by a stay 24 in front of the toolbar 14, and the stay 24 and the rear end of the top mast 19 are connected via a connecting arm 26. The connecting arm 26 is provided with a handle 27 on the top mast 19 side.
Is rotated, so that the stay 2 is held against the rod holder 26a on the top mast 19 side forming the connecting arm 26.
The movable rod 26b on the fourth side moves in the X and Y directions, and the toolbar 14 is vertically swung.

On the other hand, as shown in FIG. 1, the tool bar 14 is provided with a stand mechanism 28 for supporting the work machine 2 together with the rotary 1 when the work machine 2 is detached from the tractor 3 or the like. The structure of the mechanism 28 will be described in detail. The stand mechanism 28 is provided on the left side of the left support rod 13a in the toolbar 14, as shown in FIG.
As shown in (b), a bracket 29 fixed to the toolbar 14, a stand 31 rotatably supported by the bracket 29, and a bracket 2 of the stand 31
9 (toolbar 14).

The bracket 29 has a fitting portion 33 formed of a rectangular pipe material having a rectangular cross section which is slidably fitted to the toolbar 14 having a rectangular cross section in the left-right direction, and an upper surface and a rear surface of the fitting portion 33. And left and right support portions 34a and 34b that are substantially L-shaped in side view {FIG. 4 (b)} and are integrally fixed at predetermined intervals in the left and right directions.
A bracket 29 is fixed to the toolbar 14 with a fixing member such as a bolt 25 below, and a stand formed of a cylindrical pipe material via a fulcrum shaft 36 at a bent portion between the left and right support portions 34a and 34b. The base end of 31 is pivotally supported rotatably.

In other words, the stand 31 can be pivoted about the fulcrum shaft 36 from the position where the stand 31 abuts the rear surface of the fitting portion 33 to the position where the tip faces the front of the work machine 2. . At the front end between the left and right support portions 34a and 34b, an elastic stopper 37 made of a cushioning rubber material or the like is pivotally supported substantially over the width between the support portions 34a and 34b. The position of the front end of the stand 31 in the rotation range of the stand 31 in the rotation range of the stand 31 restricts the position to some extent to the front of the work machine 2 by the contact of the stand 31 with the work machine 2.

On the left side of the left supporting portion 34a, a fixed base 38 having a substantially L-shape in side view is axially supported by the fulcrum shaft 36 along the left side of the supporting portion 34a. At this time, the end of the fulcrum shaft 36 on the fixed base 38 side protrudes to the left (outside) of the fixed base 38, and the left side of the fixed base 38 on the fulcrum shaft 36 contacts the left side surface of the fixed base 38. A disc-shaped receiver 39 in contact with the side view is provided to be loosely fitted to the fulcrum shaft 36.

Further, a disc-shaped spring receiver 41 is provided on the left side of the receiver 39 so as to be fitted to the fulcrum shaft 36, and a spring 42 is provided between the spring receiver 41 and the receiver 39. The fixed base 38 is externally fitted to the fulcrum shaft 36, and the fixed base 38 is urged by the spring 42 to the left side surface of the support portion 34 a via the receiver 39. The spring receiver 41 is prevented from coming off from the fulcrum shaft 36 by abutting on a pin 43 provided in a radial direction at an end of the fulcrum shaft 36 on the fixed base 38 side. 34a.

On the other hand, at a portion of the fixed base 38 where the fixed base 38 and the upper portion of the fitting portion 33 of the support portion 34a overlap in a side view, a pin 44 serving as a locking portion projects toward the support portion 34a. An insertion hole 46 through which the pin 44 can be inserted is provided in a portion of the support portion 34a facing the pin 44. At this time, the pin 44 inserted into the insertion hole 46 projects inside the support portion 34a, and the stand 31 is connected to the elastic stopper 3
7 is pressed to the elastic stopper 37 with a predetermined pressure after rotating the stand 31
The storage posture B shown in FIG.
An engaging hole 47 which is an engaging portion into which the pin 44 is inserted and engaged is provided in a portion of the stand 31 opposite to the pin 44 when it is removed.

At this time, the storage position B is a position where the stand 31 is rotated further toward the elastic stopper 37 than a position where the stand 31 comes into contact with the elastic stopper 37. So that the support rod 13a, 1
It is in a posture of being stored in the front-rear direction of the work machine 2 substantially along 3b.

When the stand 31 is slightly rotated from a position where the stand 31 comes into contact with the fitting portion 33 to take a supporting posture A projecting downward below the working machine 2 shown in FIG. The engagement hole 4 provided in the
A pin 48, which is a locking portion similar to the above, is provided
Is provided to protrude toward the support portion 34a, and a portion of the support portion 34a facing the pin 48 is provided with a pin 4
An insertion hole 49 (see FIG. 5) through which the hole 8 can be inserted is provided.

Next, the turning operation of the stand 31 will be described. First, it is assumed that the stand 31 is in the supporting posture A as shown in FIG. At this time, the stand 31 has the pin 48 inserted into the engagement hole 47 and is fixed in the support posture A as shown in FIG. 5A by the above structure, and supports the working machine 2 together with the rotary 1. Note that the position of the toolbar 14 may be adjusted by the handle 27 in order to stably support the work machine 2.

The fixed base 38 provided with the pin 48 is supported by the spring 42 as described above.
The pin 48 is also urged to the side of the spring 4a.
2, the pin 48 is urged in the direction of insertion into the engagement hole 47, and the engagement between the pin 48 and the engagement hole 47 is not easily released by the vertical and rightward forces. The stand mechanism 28 (stand 31) is stably held, and the tip of the stand mechanism 28 is grounded, so that the work machine 2 can be stably supported together with the rotary 1.

On the other hand, when the work machine 2 is used, the stand 31 hinders. For this reason, the stand 31 is used so as not to hinder the use of the work machine 2.
An operation of releasing (rotating) the fixing of the supporting posture A and switching to the storage posture B will be described. From the state in which the pin 48 is engaged with the engagement hole 47 as described above, FIG.
As shown in (b), the lower end of the fixing plate 38 (the fitting portion 3
3 is pivoted outward (to the left, that is, on the opposite side of the support portion 34a) against the urging force of the spring 42, the fixed base 38 is pivoted about the fulcrum shaft 36. Inclined within the range of the fitting error between
The pin 48 comes off the stand 31 (the engagement hole 47).

Thereafter, when the stand 31 in which the fixing of the supporting posture A is released as described above and becomes free is rotated forward (in the storage posture B direction) about the fulcrum shaft 36, the stand 3 is rotated.
1 and the pin 44 abut, but since the stand 31 is cylindrical as described above, the pin 44
1 is pressed against the urging force of the spring 42 to allow the stand 31 to rotate. Therefore, the rotation of the stand 31 continues, and the pin 44 and the engaging hole 47 provided in the stand 31 face each other, and the pin 44 is automatically inserted (engaged) into the engaging hole 47 by the urging force of the spring 42. Then, the stand 31 is fixed in the storage posture B described above.

As described above, when the stand 31 is in the storage position B, the working machine is positioned above the tool bar 14 above the working machine 2 so that the tip thereof faces forward of the working machine 2 along the support rods 13a and 13b. Since the storage device is stored in the front-rear direction of the work device 2, it does not hinder the work when the work device 2 is used, and when the ridge stand 51 as an attachment work device is attached to the toolbar 14 as shown in FIG. The ridger 51 and the stand 31 do not interfere with each other.
Therefore, when the ridger 51 is attached to the toolbar 14 or when the ridger 51 is used, the stand 31 is moved to the work machine 2.
There is no need to remove from the side, and attachment and detachment of the ridger 51 can be easily performed.

The stand 31 in the storage position B is the work machine 2
Even when the tractor 3 is provided with a cabin (not shown) that covers the driver's seat 4, the stand 31 in the storage position B does not come into contact with the cabin, since the cabin (not shown) is provided in the tractor 3. . Further, the stand 31 in the storage posture B is fixed to the storage posture B by the pins 44 and the engagement holes 47 and is pressed by the elastic stopper 37 with a predetermined pressure. Fixed. For this reason, the stand 31 in the storage posture B
It does not rattle, so that noise and the like due to rattling are prevented, and the impact on the stand 31 due to rattling is reduced.

On the other hand, the switching of the stand 31 from the storage position B to the support position A is the reverse of the switching from the support position A to the storage position B. First, the front end of the fixed base 38 is swung outward to move the pin 44. After being detached from the stand 31 (the engaging hole 47), the stand 31 is rotated rearward (in the supporting posture A side) until the pin 48 is automatically inserted (engaged) into the engaging hole 47 as described above. It is done by that. That is, when the pin 48 is inserted into the engagement hole 47 by the above-described structure, the stand 31
The stand 31 is fixed to the support posture A by the engagement of the pin 48 and the engagement hole 47 by the above-described switching method.

As described above, the fixing mechanism 32 for fixing the stand 31 in the supporting position A and the storing position B is provided on the fitting portion 33 side fixed to the toolbar 14 which is a part of the frame 9 of the working machine 2. The fixed base 38, the spring 42, the pin 44, the pin 48, the insertion hole 46, the insertion hole 49, and the engagement hole 47 provided in the stand 31, etc., allow the work machine 2 to move between the frame 9 side and the stand 31. Is formed.

The stand 31 is fixed in the supporting position A and the storing position B by the fixing mechanism 32. The fixing in each position as described above is performed by the pin 48 being engaged with the engaging hole 47 or the pin 44 being engaged. The stand 3 is used because it is automatically inserted into the hole 47 and the above-mentioned fixing is easily released by swinging the fixing base 38 outward.
1 can be easily fixed and released in each posture.

The fixing mechanism 32 and the stand mechanism 2
Since the structure of FIG. 8 is constituted by a relatively simple structure as described above, it is not only advantageous in cost but also has relatively few failures. Further, the tip of the stand 31 in the storage posture B is directed toward the tractor 3, and is located at a position relatively close to the worker sitting on the driver's seat 4 of the tractor 3. Therefore, the operator can reach the back and rotate the stand 31 to the supporting position A side, and the operator can easily switch the stand 31 to the supporting position A while riding on the tractor.

As shown in FIG. 4B and the like, the lower end of the fixed base 38 extends below the lower end of the support portion 34a, and overlaps the front end portion of the fixed base 38 in the support portion 34a in a side view. The portion is provided with a concave notch 50, and this structure makes it easy to swing the front end portion and the lower end portion of the fixed base 38 outward as described above.

As shown in FIGS. 7A and 7B, the stand 31 may be detachable from the toolbar 14. That is, the holder 52 for elastically holding the stand 31 on the upper surface of the toolbar 14 is moved in the left-right direction (the toolbar 14).
If the stand 31 is unnecessary, the stand 31 is held by the holder 52 and stored alone along the toolbar 14 on the upper surface of the toolbar 14.

On the other hand, a support portion 53 for supporting the toolbar 14 is provided on the base end portion (the end opposite to the ground end) of the stand 31, and the support portion 5 of the stand 31 is provided on the toolbar 14.
A mounting hole 54 through which a portion closer to the base end than 3 can be inserted is provided in the vertical direction. When the stand 31 is used, as shown in FIG. And the toolbar 14 of the stand 31
The stand 31 is attached to the tool bar 14 by attaching the retaining pin 56 to the portion protruding upward, and the position of the tool bar 14 is adjusted by the handle 27 to support the work implement 2.

[0030]

According to the present invention constructed as described above, the stand is attached to the frame of the working machine so as to be able to rotate back and forth above the working machine provided with the rotary. It is stored in the front and rear direction of the machine. Therefore, by storing the stand above the toolbar, it is possible to prevent interference between the stand in the storage position and the attachment work machine such as the ridge that is attached to the toolbar, and the ridge is easily removed without removing the stand. There is an effect that the attachment working machine can be attached to the toolbar.

[Brief description of the drawings]

FIG. 1 is a side view of a rear side of a tractor and a rotary working machine.

FIG. 2 is a side view of a rotary working machine connected to a tractor.

FIG. 3 is a plan view of a main part of the rotary working machine.

FIGS. 4A and 4B are a plan view and a side view of a main part of a stand.

FIG. 5A is a rear view of a main part of the stand, and FIG. 5B is a rear view showing a state where the stand is unlocked.

FIG. 6 is a plan view of a main part of a rotary working machine to which a ridge is attached.

FIGS. 7A and 7B are a side view and a plan view of a toolbar portion.

FIG. 8 is a side view of the rotary working machine with the stand switched to a use state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rotary 2 Work machine 9 Frame 31 Stand 32 Fixing mechanism A Support posture B Storage posture

Claims (1)

[Claims] 1. A support posture (A) projecting downward below a work machine (2) with respect to a frame (9) of the work machine (2) provided with a rotary (1); A stand (31) is attached to the storage position (B) stored in the front-rear direction above and below so as to be rotatable back and forth, and a stand (31) is provided between the frame (9) side and the stand (31).
A stand in a rotary working machine provided with a fixing mechanism (32) for fixing the supporting posture (A) and the storage posture (B).