JPS6262212B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for attaching and detaching a front loader to a tractor, which is used by being attached to a tractor for loading and unloading soil, fertilizer, etc.

The front loader is attached to the tractor when performing the above work, and is removed when the work is completed.This attachment/detachment operation is performed by controlling the operation of the lift cylinder and its piston, which are equipped on the front loader to raise and lower the lift arm. The lift arm of the front loader is pivotally connected to the lift cylinder and the lift cylinder. The lift arm of the front loader is pivotally connected via a piston, and the mounting frame, which is L-shaped in side view and is attached to be movable up and down via the lift cylinder and piston, has locking pins that extend left and right at the L-shaped base. A front guide rail with a downward slope is provided at the front, and a stand capable of supporting the front loader is attached to the front part, and the front and rear intermediate parts of this mounting frame have a guiding function to the pin hole at the bottom. A locking recess is formed by the intermediate guide rail and a protrusion provided at the rear of the intermediate guide rail. Front guide pins for guiding the front guide rail are provided laterally on the left and right, and a locking part with a locking hole formed at the rear end of the guide part is provided at the rear to receive the locking pin of the L-shaped base. , Intermediate guide pins guided by the intermediate guide rail and having pin holes are provided laterally in the front and rear intermediate positions, and the lift cylinder and the piston can be compressed when the locking recess is engaged with the intermediate guide pin. At the same time, the upward movement of the front guide rail guided by the front guide pin causes the front and rear middle pin holes of the mounting frame and the locking pin of the L-shaped base to be inserted into the front frame's middle guide pin and the locking hole, respectively. It is an object of the present invention to provide a front loader attachment/detachment device characterized by being configured to correspond to the above. Hereinafter, one embodiment of the present invention will be described in detail with reference to the accompanying drawings. For convenience of explanation, conventionally known configurations will also be explained at the same time. As shown in FIGS. 3A and 3B, the front parts of the left and right mounting frames 3, 3, which are L-shaped in side view and are formed by the horizontal member 1 and the vertical member 2, are connected to each other by a connecting rod 4. Connect this L of the mounting frame 3.
Seats 5, 5 are provided protruding from the base of the letter, and a locking pin 6 is bridged between the seats 5, 5. Mounting feet 7 are fixed to the front part of the horizontal member 1, and the front rail 8a that descends forward and the rear A stand 11 in which a front guide rail 8 consisting of a rail 8b is fixed to the inner surface of the mounting foot 7 and supported by a fulcrum pin 9 and a locking pin 10 so as to be in an upright position as shown in the figure.
is installed so that it can be placed in an inverted position as shown in Figure 1.

In addition, side plates 12, 12 are fixed to the left and right near the middle of the horizontal member 1 in the front-rear direction, and an intermediate guide rail 13, which is hook-shaped in side view, is fixed to the side plates 12, 12.
A triangular projection 14 fixed to the horizontal member 1 is positioned behind the upper end of the upper rail 13a of the intermediate guide rail 13, and a locking recess A is formed between the intermediate guide rail 13 and the triangular projection 14. ing. or,
As shown in FIGS. 4A to 4C, front guide pins 17, 1
A stand bracket 18 having a U-shape in plan view and projecting in the left-right direction is fixedly installed, and an intermediate guide pin 19 having a pin hole 19a is installed near the middle of the front frame 16 in the front-rear direction so that the upper end thereof faces laterally in the left-right direction. Projecting brackets 20, 20 are fixed to the left and right side plates of the front frame 16, respectively, and locking portions 21, 21 each having a guide portion 21a and a locking hole 21b are provided on the left and right side plates at the rear of the front frame 16. It is permanently installed. And dump cylinder 2
2, the bases of the left and right lift arms 24, 24, each having a bucket 23 attached to its tip, which is rotated by It is pivoted to.

Then, as shown in FIG.
Fix this stand 11, 11 at 0,10,
The pistons 26a, 26a of the lift cylinders 26, 26 that raise and lower the lift arms 24, 24 are made to protrude, and the horizontal members 1, 1 of the mounting frames 3, 3 are placed in a forward tilted position, and this front loader 27 is mounted on the bucket 23, the stand 11, 11 on the ground, approach the tractor 15 from behind the mounting frames 3, 3, and peek out the front part of the tractor 15 between the left and right mounting frames 3, 3.
2, 12, 12, 12 are slightly fitted onto the intermediate guide pins 19, 19 standing upright from the front frame 16, and the rear locking pins 6, 6 are fitted onto the guide portions of the locking portions 21, 21. 21a and above 21a. Therefore, the hydraulic hoses 40a, 40b... are connected to the control valves V of the hydraulic operation circuit, the control valve lever 41 is operated, and the pistons 26a, 26
6a toward the lift cylinders 26, 26, the front loader 27 rotates clockwise in FIG. 2 about the grounding points of the stands 11, 11, and the intermediate guide pins 19, will ride on the locking recesses A, A', and as the front loader 27 continues to rotate clockwise around the intermediate guide pins 19, 19 in this state, the locking pins 6, 6 is the locking part 21, 2
When the front loader 27 is rotated so that it is placed on the guide portions 21a, 21a of 1, the front portion of the front loader 27 rises around the intermediate guide pins 19, 19, and the left and right front guide pins 17 move toward the front guide portions 21a, 21a. When the front guide pin 17 moves along the rear rail 8b that comes into contact with the upper part of the rear rail 8b of the rail 8 and is inclined forwardly downward, the front loader 2
7, its front part rises and its rear part moves rearward (the locking pins 6, 6 move to the guide parts 21a, 21
a), so that the intermediate guide pins 19, 19 are aligned with the upper rails 13a, 13a.
The intermediate guide pins 19, 1 are guided by the intermediate guide rails 13, 13,
The pin holes 19a, 19a of 9 match with the pin holes 12a of the side plates 12, 12, and the locking pins 6, 6 engage with the locking holes 21b, 21b as shown in FIG.

The upper rails 13a, 13a of these intermediate guide rails 13, 13 have an inclination,
Furthermore, since the mounting frames 3, 3 also rotate while being tilted as described above during installation, the intermediate guide pins 19, 19 are securely attached to the intermediate guide rails 13, 13.
It will fit. Then, the pin holes 19a, 19a of the intermediate guide pins 19, 19 and the side plate 12,
Insert the pins 28, 28 into the 12 pin holes 12a, 12a, and insert the plates 29, 29 integral with the pins 28, 28.
By fitting the pins 30, 30 protruding from the side plate 12, and inserting retaining pins into the pins 30, 30, both left and right ends of the left and right intermediate guide pins 19 are fixed to the mounting frame 3. Left and right side plates 1
2 and 12 to restrict left and right movement, and the outer ends of the front guide pins 17 and 17 are connected to the mounting legs 7 and 7.
Accordingly, the brackets 5, 5 to which the locking pin 6 is attached are fitted onto the locking portion 21, and the left and right movement of the mounting frames 3, 3 is restricted, and the front loader 27 is fixed to the tractor 15. That will happen. In this fixed state, the mounting legs 7, 7 are formed to be located in front of the front wheels 39, 39 of the tractor 15.

Therefore, the pistons 26a, 26a are retreated toward the lift cylinders 26, 26, and the vertical frame 32 of the connector frame 31 is attached to the pin 33 at the bottom of the vertical member 2 of one mounting frame 3, as shown in FIG. Front loader 27
During the installation work, remove the horizontal frame 34 of the connector frame 31 from above the vertical members 2, 2, and after the front loader 27 has been installed as described above, rotate the connector frame 32 clockwise. and attach the hook 34a of the horizontal frame 34 to the other vertical member 2.
At the same time, the hook 36 at the top of the vertical frame 32 is engaged with the locking pin 37 at the top of one of the vertical members 2, and the lock lever 38
When the hook 38a is engaged with the locking pin 37, the upper portions of the left and right vertical members 2, 2 are connected by the connector frame 31 to form a framework shape. Also, remove pins 10 and 10 and attach stand 11,
11 and attach these pins 10, 1 as shown in Figure 1.
Just replace it with 0. Furthermore, in order to remove the front loader 27 mounted on the tractor 15, it is sufficient to perform the above-mentioned mounting operation in roughly the reverse order.
6a toward the cylinders 26, 26, the front wheels 39, 3 of the tractor 15
9, the intermediate guide pin 19 will be supported by the lower rail 13b of the intermediate guide rail 13, and the pin 28 inserted into the pin holes 12a and 19a will play, so the pin 28, 2
Take out 8. Then, remove the hook 34a of the horizontal frame 34 of the connector frame 31 from the locking pin 35 and remove the connector frame 31 as shown in FIG. ,26
When the front loader 27 is protruded from the front, the front part of the front loader 27 moves downward, and the front rail 8a of the front guide rail 8 follows the front guide pin 17, so that the front loader 27
starts moving forward.

Then, the upper rail 13a of the intermediate guide rail 13 follows the intermediate guide pins 19, 19,
Further, the locking pins 6, 6 are detached from the locking holes 21b, 21b and are moved along the guide portions 21a, 21a.
The front loader 27 moves forward together with the mounting frames 3, 3, and the locking recesses A, A ride on the intermediate guide pins 19, 19. After this, the front loader 27 moves forward around the intermediate guide pins 19, 19. The front part of the stand moves downward and the stands 11, 11 touch the ground. Then, the rear parts of the mounting frames 3, 3 move upward using the grounding points of the stands 11, 11 as fulcrums, so that the locking recesses A, A are upwardly separated from the intermediate guide pins 19, 19. Therefore, if the hydraulic hoses 40b, 40b... are removed from the control valve V and the tractor 15 is moved backward, the front loader 27
will be completely removed.

Since the front loader attachment/detachment device according to the present invention is configured as described above, the stands 11, 1
1 and the front part of the front loader 27, the front loader 27 is supported on the ground by the front part of the front loader 27.
The front loader 27 can be easily attached to the tractor 15 by an extremely simple operation of just retracting the lever a, and the front loader 27 in the attached state can be operated to project the pistons 26a, 26a of the lift cylinders 26, 26. Therefore, it can be easily removed from the tractor 15, and there is no need for a separate elevating machine such as a crane, and the work of attaching and detaching it to the tractor can be easily performed with little effort. As shown in the example, the mounting feet 7, 7 are positioned forward of the front wheels 39, 39, and the intermediate guide pins 19, 19 are provided at a high position from the front frame 16, so that the Even when the wheels 39, 39 are steered completely left and right, there is no danger of the front wheels 39, 39 colliding with the mounting feet 7, 7, intermediate guide pins 19, 19, etc. Also, since the mounting feet 7, 7 are located near the front of the front frames 16, 16, it is important to check the forward view of the operator in the driver's seat, especially the vicinity of the treads of the front wheels 39, 39. It is not hindered by 7.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention; FIG. 1 is a side view showing the state after installation, FIG. 2 is a side view showing the state before installation, and FIG. 3A is a side view of the mounting frame. Figure B is a view from arrow B in Figure A, and Figure 4A is a view from arrow B in Figure A.
In the figure, B is a side view of the main part, B is a view taken along arrow C in A of the figure, and C is a plan view of A in the figure. Explanation of symbols, 1...Horizontal member, 2...Vertical member, 3...
...Mounting frame, 4...Connecting rod, 5...Seat, 6...
...Latching pin, 7...Mounting foot, 8...Guide rail, 8a...Front rail, 8b...Rear rail, 9...
... fulcrum pin, 10 ... locking pin, 11 ... stand, 12 ... side plate, 12a, 19a ... pin hole,
13... Intermediate guide rail, 13a... Upper rail, 13b... Lower rail, 14... Protrusion, 15
...Tractor, 16...Front frame, 17
... Front guide pin, 18 ... Stand bracket, 19 ... Intermediate guide pin, 20 ... Bracket, 21 ... Locking part, 21a ... Guide part, 21
b... Locking hole, 22... Dump cylinder, 23...
...bucket, 24...lift arm, 25,2
8, 30, 33...Pin, 26...Lift cylinder, 26a...Piston, 27...Front loader, 29...Plate, 31...Connector frame, 3
2...Vertical frame, 34...Horizontal frame, 35,
37... Locking pin, 34a, 36, 38a... Hook, 38... Lock lever, 39... Front wheel,
40a, 40b...hydraulic hose, 41...control valve lever, V...control valve, A...locking recess.

Claims (1)

[Claims] 1. The mounting frame, which is L-shaped in side view and which is pivotally connected to the lift arm of the front loader and is attached to be movable up and down via the lift cylinder and piston, is provided with left and right locking pins at the L-shaped base.
A front guide rail with a forward downward slope is provided at the front, and a stand capable of supporting the front loader is attached to the front part, and a front guide rail is installed at the front and rear middle of this mounting frame to have a guiding effect to the pin hole at the bottom. In addition to providing a downwardly inclined intermediate guide rail,
A locking recess is formed by this intermediate guide rail and a projection provided at the rear of this intermediate guide rail,
On the front frame of the tractor, front guide pins for guiding the front guide rail are provided on the front side in left and right directions, and a guide pin is provided on the rear end of the guide section to receive the locking pin of the L-shaped base at the rear. A locking portion having a locking hole is provided, and intermediate guide pins guided by the intermediate guide rail and having pin holes are provided horizontally at the front and rear intermediate positions, and the locking recess is locked to the intermediate guide pin. The upward movement of the front guide rail guided by the front guide pin as the lift cylinder and piston contract in the
A front loader attachment/detachment device characterized in that a pin hole at a front and rear intermediate portion of a mounting frame and a locking pin in an L-shaped base are configured so that an intermediate guide pin of a front frame corresponds to the locking hole, respectively.