JPH0674597B2 - Front loader attachment / detachment device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a front loader attaching / detaching device detachably attached to a tractor.

(Prior Art) As a front loader detachably mounted on a tractor, for example, a front loader disclosed in Japanese Utility Model Laid-Open No. 60-96454 is known. This conventional one has a mounting base projecting on both sides in the left-right width direction in the middle of the front and rear direction of the tractor body, and the left and right support columns of the front loader are detachably mounted on the mounting base. It was connected to the front with braces. The pair of left and right braces are arranged in an eight shape in a plan view so that the front end of the brace approaches the front of the vehicle body.
The front end and the vehicle body were made detachable, and the rear end was fixed to a support column.

To remove the front loader from the tractor body,
After grounding the bucket, release the connection between the front end of the brace and the front of the vehicle body, and the connection between the bottom end of the column and the mounting base, and operate the boom cylinder or bucket cylinder. It was being moved upwards to the post.

(Problems to be Solved by the Invention) In the above-mentioned conventional front loader, since the braces for reinforcing the columns are arranged in an eight shape in a plan view,
When a muffler, an air cleaner, or the like protrudes from the side surface of the tractor vehicle body, there is a problem that the brace collides with the protrusion of the muffler or the like when the front loader is attached or detached.

Therefore, when there is an obstacle projecting to the side of the vehicle body, the brace has to be removed from the column, and the attaching / detaching work is extremely complicated.

Therefore, it is an object of the present invention to provide a front loader attaching / detaching device capable of attaching / detaching the front loader without removing the brace from the support even when the obstacle is provided to the side of the vehicle body.

(Means for Solving Problems) In order to achieve the above object, the present invention takes the following means. That is, the feature of the present invention is that a mounting base projecting to the left and right in the width direction is provided in the middle of the front and rear direction of the tractor vehicle body, and the columns of the front loader are detachably erected on each mounting base. The upper part of the pillar and the front part of the vehicle body are connected by a brace, and the pair of left and right braces are arranged in a figure eight shape in plan view so that the front end parts thereof approach the front of the vehicle body. The part is detachably connected to the front part of the vehicle body, and the rear end part is pivotally attached to the pillar so as to be rotatable in the left-right direction, and the front end part of the brace is urged to the left and right outside between the brace and the pillar. The point is that an elastic member is interposed.

(Operation) According to the present invention, since the brace is pivotally attached to the column so as to be rotatable in the left-right direction, and the front end side thereof is biased by the elastic member so as to move to the left and right outwards, the front end of the brace is When free, the brace is located on the left and right outside.

Therefore, when the front loader is mounted on the tractor, the brace is located on the outer side, and therefore, even if the front loader is lowered from above, the brace does not collide with the protruding obstacle from the vehicle body.

Then, after the support column is placed on the mount, the front end of the brace is moved toward the vehicle body side against the elastic member, and the front end portion and the front portion of the vehicle body are connected to complete the mounting work.

When removing the front loader from the vehicle body, the front end of the brace and the front portion of the vehicle body are disconnected. By this release, the front part of the brace becomes free, so that the brace is opened to the left and right by the elastic member. Therefore, even if the front loader is moved upward, the brace and the obstacle protruding to the outside of the vehicle body do not collide with each other.

(Example) Hereinafter, the Example of this invention is described based on drawing.

2-3, 1 is a tractor, and the tractor 1 has a pair of left and right front wheels 2 and rear wheels 3. Tractor 1
Has a bonnet 4 that covers the engine, etc.
A steering wheel 5 is provided at the rear of the hood 4. A driver's seat 6 is arranged behind the steering wheel 5 and above the left and right rear wheels 3.

From the side of the bonnet 4 to the muffler 7 and the air cleaner 8
Are projected outward to the left and right.

A lateral frame 9 is transversely fixed to a lower abdomen of the vehicle body of the tractor 1 in the front-rear direction, and both ends of the lateral frame 9 project outward from both left and right side surfaces of the vehicle body of the tractor 1. Attachments 10 are fixed to both ends of the horizontal frame 9. This mounting base 10 has a positioning pin protruding upward.
11 is fixed, and a bracket 13 that allows the locking pin 12 to be inserted and removed from the rear is fixed.

A front and rear frame 14 extending rearward is fixed to the left and right protruding portions of the lateral frame 9, and a rear end of the front and rear frame 14 is fixed to a rear axle box 15. Further, the left and right protruding portions of the horizontal frame 9 are provided with a reinforcing frame 16 extending forward,
The front portion of the reinforcing frame 16 is fixed to the rear portion of the front axle frame 17. The front axle frame 17 is fixed to both sides of the lower part of the engine, and a brace support 19 is transversely fixed to the front portion of the front axle frame 17 via a bracket 18 (see FIGS. 1 and 4). ).

Engagement pins 20 protruding outward in the left and right directions are fixed to both ends of the brace support 19. Locking springs 21 are fixed to both ends of the brace support 19.

22 is a front loader, and the front loader 22 is
A pair of left and right pillars 23 that are detachably mounted upright on the mount 10, a boom 24 that is pivotally attached to the upper end of the pillars 23 so as to be rotatable in the vertical direction, and extends forward, and the boom. A bucket 25 pivotally attached to the front end of 24 so as to be rotatable in the vertical direction;
Boom cylinder 26 interposed between 23 and boom 24, and bucket cylinder 27 interposed between boom 24 and bucket 25
And a brace 28 for connecting the support 23 and the brace support 19 to each other.

The pillar 23 has a positioning hole 29 into which the positioning pin 11 is removably inserted and a locking hole 30 into which the locking pin 12 is removably inserted (see FIG. 5). As shown in FIG. 2, the support pin 23 is fixed to the mount 10 by fitting the positioning pin 11 into the positioning hole 29 and fitting the locking pin 12 into the locking hole 30.

As shown in FIG. 3, the brace 28 is arranged in an eight shape in plan view, and the front portion of the brace 28 is close to the vehicle body. Then, as shown in FIG. 2, in the state in which the brace 28 is mounted on the tractor 1, the brace 28 is provided with a front portion in a front-down shape so as to pass below the protrusions of the muffler 7 and the air cleaner 8.

As shown in FIG. 1, a rear end brace of the brace 28 is pivotally attached to the upper portion of the column 23 so as to be rotatable in the left-right direction. An elastic member 31 that urges the front portion of the brace 28 to the left and right is interposed between the brace 28 and the column 23. In this embodiment, a tension spring is illustrated as the elastic member 31, but another member may be used.

When the front end of the brace 28 is free, the brace 28 is urged by the elastic member 31, so that the brace 28 is in the position shown by the dotted line in FIG.

At the front end of the brace 28, there is an engaging hole 32 that receives the engaging pin 20 in a removable manner, and by inserting the engaging pin 20 into the engaging hole 32, The brace support 19 is connected. In this connected state, the locking spring 21 engages with the outer surface of the brace 28 to prevent the brace 28 from moving outward.

As shown in FIG. 4, the locking spring 21 and the brace 28 are deformed by deforming the locking spring 21 in the direction of the arrow.
Is disengaged, and the brace 28 is rotated leftward and rightward by the urging force of the elastic member 31. In this rotating state, the brace 28 is located outside the muffler 7 and the air cleaner 8.

Explaining the attachment / detachment operation of the front loader 22, the mounted state shown in FIG. 2 to the detached state shown in FIG. 5 is performed as follows.

First, the bucket 25 is grounded, and the stand 33 is attached to the bucket 25. Next, the locking pin 12 is pulled out, and the locking spring 21 is moved in the direction of the arrow in FIG. Due to the movement of the locking spring 21, the brace 28 is pivoted outward by the elastic member 31 to close the position shown by the dotted line in FIG.
Next, by contracting the bucket cylinder 27, the rear part of the boom 24 moves upward, the column 23 also moves upward, and the column 23 separates from the mount 10. The brace 28 also moves upward along with the upward movement of the column 23, but since the front portion of the brace 28 has moved outward, it does not collide with the projection of the muffler 7 or the air cleaner. After that, if the tractor 1 is moved backward, the removing work is completed.

To attach the front loader 22 to the tractor 1 from the detached state, the procedure reverse to the above may be performed. At this time, in order to connect the front portion of the brace 28 to the brace support 19, the front portion of the brace 28 may be pushed inward so that the engagement pin 20 is inserted into the engagement hole 32. The pushing spring deforms the locking spring 21 to allow the brace 28 to move, and then the bent end of the locking spring 21 is braceed.
The outer surface of the brace 28 is locked to prevent the brace 28 from moving outward.

The present invention is not limited to the above embodiment.

(Effect of the Invention) According to the present invention, when the front loader is attached and detached, the attaching and detaching work can be performed without removing the brace, so that the attaching and detaching work can be performed extremely easily and quickly.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a front view showing the same overall structure, FIG. 3 is a plan view of the same, and FIG. 4 is a view taken along the line IV-IV of FIG. FIG. 5 is a front view showing the removed state. 1 ... tractor, 10 ... mounting base, 22 ... front loader, 23 ... support, 28 ... brace, 31 ... elastic member

Claims (1)

[Claims] 1. A tractor body is provided with a mounting base projecting to the left and right in the widthwise direction at a middle portion in the front-rear direction, and a support of a front loader is detachably erected on each of the mounting bases. The front part is connected by a brace, and the pair of left and right braces are arranged in a figure eight shape in plan view so that the front end parts thereof approach the front part of the vehicle body. The rear end of the brace is pivotally attached to the column so as to be rotatable in the left-right direction, and an elastic member for biasing the front end of the brace to the left and right is interposed between the brace and the column. An attachment / detachment device for the front loader, which is characterized in that