JPH0141800Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a work implement attachment device for attaching a work implement to a traveling vehicle, such as a tractor, via a three-point linkage mechanism.

<Prior art> Conventionally, when attaching a forklift to a three-point linkage mechanism of a tractor, as shown in Utility Application No. 58-71767, after connecting the following by scooping with a special hook-shaped frame, The configuration was such that the tilt cylinder was connected to the lift side.

<Problems to be solved by the invention> According to the above configuration, it is difficult to dock the tractor when it is misaligned in the left-right direction, and it is difficult to align the tilt cylinder because the tilt cylinder is attached to the lift side after scooping. It had the disadvantage of being time consuming. Additionally, when removing the lift, force is applied to the tilt cylinder, making it difficult to remove the pin. In view of the above-mentioned problems, the present invention aims to facilitate the work of attaching and detaching a working machine.

<Means for solving the problem> The technical means includes providing the three-point linkage mechanism 4 of the traveling vehicle 1 with a substantially mountain-shaped male engaging body 11, and
A female engaging body 12 having a substantially mountain shape is provided on the working machine 7 side, and a male engaging body 11 is removably engaged with the male engaging body 11 from below.
In the work machine mounting device equipped with a locking means for preventing the male engaging member 11 from separating downward from the female engaging member 12, the locking means is supported above the top opening 29 of the female engaging member 12 so as to be freely retractable. locking rod 3
3, a biasing spring 35 that biases the locking rod 33 in the protruding direction, and a regulating body 39 that comes into contact with the protruding end of the locking rod 33 so as to be able to move toward and away from the locking rod 33 and releasably prevent the locking rod 33 from protruding. A lock body 25 is provided on the top of the male engagement body 11 and protrudes upward from the top opening 29 to release the regulating body 39 for the female engagement body 12 .
A lock hole 26 is formed through which the lock hole 26 is passed.

<Operation> According to the present invention, the substantially mountain-shaped male engaging body 11 provided in the three-point linkage mechanism 4 is engaged with the substantially mountain-shaped female engaging body 12 provided on the working machine 7 side from below. Therefore, even if the centers of the traveling vehicle 1 and the working machine 7 are shifted from each other in the left-right direction, the male engaging body 11 can be easily engaged with the female engaging body 12.
Further, during this engagement, the locking body 25 provided at the top of the male engaging body 11 projects upward from the top opening 29 of the female engaging body 12, comes into contact with the regulating body 39, and pushes the regulating body 39 upward. , regulatory body 39
When the lock rod 33 is urged in the protruding direction and the lock hole 26 of the lock body 25 and the lock rod 33 are aligned, the lock hole 26
When the locking rod 33 is biased by the biasing spring 35,
It is penetrated and a lock condition is obtained here. Further, by retracting the locking rod 33 against the biasing force of the biasing spring 35 and moving the male engaging body 11 downward, it can be easily removed. In this way, attachment and detachment work can be easily performed.

<Embodiment> Hereinafter, an embodiment of the present invention will be described based on the drawings. In FIGS. 1 to 9, reference numeral 1 denotes a traveling vehicle, exemplified by a tractor, and a pair of left and right lift arms 2 are provided on the rear upper surface of the vehicle. A hydraulic system 3 for lifting and lowering a working machine is installed. Reference numeral 4 denotes a three-point link mechanism provided in the vehicle 1, which is composed of a central tilt cylinder 5 that can be freely adjusted by extension and contraction, and a pair of left and right lower links 6.

7 is a forklift as an example of a working machine,
A guide rail in the height direction is formed on the frame 8,
The elevator platform 9 can be freely operated up and down along this guide rail.
is attached, and a fork 10 is attached to the lifting platform 9.

The forklift 7 is attached to the rear of the vehicle 1 via the three-point linkage mechanism 4, the male engaging body 11, and the female engaging body 12 so as to be able to rise and fall freely and to be detachable.

The male engaging body 11 is detachably attached to the three-point link mechanism 4, and is mainly composed of a substantially mountain-shaped frame 13 and a pair of left and right reinforcing members 14.
The frame 13 includes a pair of left and right oblique side members 15, a flat plate-shaped bridge member 16 connecting the upper ends of both oblique side members 15, vertical members 17 vertically installed on the lower ends of both oblique side members 15, and both vertical sides. Construction material 18 installed between members 17
It consists of. As shown in FIG. 6, the oblique side member 1
Reference numeral 5 is made of a rectangular tubular member, and the reinforcing member 14 is made of a channel member having a U-shaped cross section, and is fixed to the entire inner surface of the oblique side member 15 except for the upper part. Further, a lower link connecting portion 1 is provided on the lower surface side of the lower end of each vertical member 17.
9 is formed, and the lower link 6 is detachably connected to the protruding pin 20 to the connecting portion 19. The upper ends of both reinforcing members 14 are connected by a substrate 21, and this substrate 2
1, a pair of left and right side plates 22 are erected in a forward-protruding manner, the front side of which is a top link connection part 23, and one end of a tilt cylinder 5 as a top link is attached to this connection part 23 so that the connection position is vertically They are removably connected by a pin 24 so that they can be changed. Further, a cylindrical lock body 25 is provided protruding from the upper surface of the bridge member 16 at the top.
A lateral lock hole 26 is formed in the middle of the vertical direction.

The female engaging body 12 is mounted on the forklift 7 and is mainly composed of a substantially mountain-shaped frame 27 corresponding to the frame 13 of the male engaging body 11 . The frame body 27 is fitted onto the frame body 13 of the male engaging body 11, and is formed by connecting a pair of left and right oblique side members 28 at their upper ends. The hypotenuse member 28, as shown in FIG.
It has a groove shape that opens inwardly and in the vertical direction, and is configured such that the oblique side member 15 of the male engaging body 11 is removably inserted therein. Further, an opening 29 is formed at the top of the frame 27, from which the locking body 25 protrudes freely, and support plates 30 are provided upright on both side edges of the opening 29, facing each other. Each support plate 30 has a lock hole 2 of the lock body 25.
Insertion holes 31 are formed in communication with 6 in the lateral direction. A support tube 32 is fixed to the outer surface of one of the support plates 30, and the support tube 32 is attached to the support tube 32.
A locking rod 33 is inserted through the inner part so as to be relatively movable in the axial direction.
An operating gripping rod 34 is fixed to one end of the locking rod 33, and the other end passes through the insertion hole 31 of the support plate 30, as shown in FIG.
It is configured to pass through both the lock hole 26 of the lock body 25 and the insertion hole 31 of the other support plate 30. Further, a biasing spring 35 is mounted within the support tube 32 to bias the locking rod 33 toward the lock body 25. 36 is a spring receiving pin, which is fixed to the lock rod 33. A lock rod engaging body 37 is fixed to the outer lower surface of the support tube 32 in a manner that projects outwardly, and a locking recess 38 is formed at the outer end thereof. Then, when the locking rod 33 is pulled out and rotated, the gripping rod 34 is moved to the locking recess 3.
8, and the return of the locking lever 33 by the biasing spring 35 is prevented. At this time, as shown in FIG. 5, the locking rod 33 is held recessed in the insertion hole 32 of the support plate 30. Also, support plate 3
As shown in FIGS. 7 and 8, a torsion coil spring 39 serving as a regulating body is attached to the front of the inner surface of 0 by bolts and nuts. One end of the torsion coil spring 39 is connected to the locking hole 40 of the support plate 30.
The other end is inserted into the stopper pin 4 and locked.
1, and is mounted so as to be positioned at the center of the insertion hole 31 of the support plate 30. Further, at the other end of the torsion coil spring 39, a pushing portion 4 is bent so as to protrude on the locus along which the lock body 25 protrudes.
2 is provided. As shown in FIG. 5, when the locking rod 33 is retracted, the pushing part 42 of the torsion coil spring 39 is located at the center of the insertion hole 31 of the support plate 30, and the torsion coil spring 39 is pushed out of the locking rod 33. The lock rod 33 is configured to come into contact with the end so as to be movable toward and away from the lock rod 33, thereby preventing the lock rod 33 from protruding. The rear surface of the frame body 27 of the female engaging body 12 is fixedly or detachably attached to the erection rods 43 and 44 that extend between the frames 8 of the forklift 7.

When attaching the forklift 7 to the vehicle 1, pull the locking rod 33 outward and release it, as shown in FIG.
A state is obtained in which the pushing portion 42 of No. 9 is in contact with the protruding end of the locking rod 33. In this state, the vehicle 1 is positioned at the front side of the forklift 7, and then the hydraulic system 3 is activated to provide a 3
The point link mechanism 4 is lowered, the vehicle 1 is moved backward in this state, and the male engaging body 11 is moved to the lower side of the female engaging body 12 provided on the forklift 7 side. next,
The hydraulic device 3 is operated to raise the three-point linkage mechanism 4, and as a result, the frame 13 of the male engaging body 11 is fitted into the frame 27 of the female engaging body 12. Since both the frames 13 and 27 of the female engaging body 11 and the female engaging body 12 are formed in a substantially mountain shape, the frame 13 will not move the forklift 7 even if the frames 13 and 27 are misaligned in the left and right direction. While being lifted from below, it is easily fitted into the frame 27 as shown in FIG. 3, and the frame 13 is prevented from moving forward, backward, left, right, and upward within the frame 27. Also,
During the fitting, the lock body 25 of the male engagement body 11 is projected upward from the opening 29 of the female engagement body 12, and the upper end of the lock body 25 is connected to the torsion coil spring 39.
At the same time, the pushing part 42 is pushed upward against the elastic force of the torsion coil spring 39, and the contact between the lock rod 33 and the torsion coil spring 39 is released, and the lock is released. The rod 33 is projected by the biasing force of the biasing spring 35. When the insertion hole 31 of each support plate 30 and the lock hole 26 of the lock body 25 are aligned, the lock rod 33 is inserted into the insertion hole 31 of each support plate 30 and the lock hole 26 of the lock body 25, as shown in FIG. A state is obtained in which the frame body 13 of the male engaging body 11 is inserted through the hole 26, and the downward movement of the frame body 13 of the male engaging body 11 is also restricted, and both the frame bodies 13, 27
is considered to be in a locked state. That is, the locking body 25, the locking lever 33, each support plate 30, etc. constitute a locking means. As described above, it is easy to install, automatically locks, and is convenient to use.

Next, when separating the forklift 7 from the vehicle 1, as shown in FIG.
9, and rotate the gripping rod 34 to lock the locking rod 34 as shown by the imaginary line in FIG.
The forklift 7 can be separated from the vehicle 1 by engaging and holding the locking recess 38 of the forklift 7 and lowering the three-point linkage mechanism 4 with the lock released.

In the above embodiment, the forklift 7 is shown as the working machine, but it may be a rotary tiller or the like, and is not limited to the working machine.
Further, although a torsion coil spring 39 is shown as a regulating body, a swingably supported support plate may also be used as a regulating body.

<Effects of the invention> According to the invention, the substantially mountain-shaped male engaging body provided in the three-point linkage mechanism is engaged with the substantially mountain-shaped female engaging body provided on the work machine side from below. Therefore, even if the centers of the traveling vehicle and the work equipment are misaligned in the lateral direction, the male engaging body can be easily engaged with the female engaging body. The locking body and the locking rod provided on the female engaging body are automatically engaged in a locked state, making the installation work easy.
When disengaging, if the engagement between the locking rod and the locking body is released and the male engaging body is moved downward,
It has the advantage that it can be easily detached and the detachment work can be easily performed.

[Brief explanation of the drawing]

Fig. 1 is a partially sectional front view showing an embodiment of the present invention, Fig. 2 is an overall side view, and Fig. 3 is Fig. 2-
4 is an enlarged sectional view of the main part of FIG. 3, FIG. 5 is an explanatory diagram of the same operation, and FIG. 6 is a diagram of FIG.
7 is a cross-sectional view of FIG. 5 as viewed from the line, FIG. 8 is a view of FIG. 7 as viewed from the line, and FIG. 9 is a view of FIG. 5 as viewed from the line. 1... Running vehicle, 4... Three-point linkage mechanism, 7...
...Forklift, 11...Male engaging body, 12...
Female engaging body, 25... Lock body, 26... Lock hole, 29... Opening, 33... Lock rod, 35...
Biasing spring, 39...Torsion coil spring.

Claims (1)

[Scope of utility model registration request] The three-point linkage mechanism 4 of the traveling vehicle 1 is provided with a male engagement body 11 having a substantially mountain shape, and a female engagement body having a substantially mountain shape is provided on the working machine 7 side to which the male engagement body 11 is removably engaged from below. In the working machine mounting device, which includes a combination 12 and a locking means for preventing the male engaging member 11 from separating downward from the female engaging member 12, the locking means protrudes and retracts above the top opening 29 of the female engaging member 12. A freely supported locking rod 33 and the locking rod 3
A biasing spring 35 biases the locking rod 3 in the protruding direction, and the locking rod 3
A locking body 25 is provided on the top of the male engaging body 11, and a locking body 25 is provided on the top of the male engaging body 11, and a locking body 25 that projects upwardly from the top opening 29 to release the regulating body 39 is provided on the female engaging body 12. A working machine mounting device characterized in that the lock body 25 is formed with a lock hole 26 through which the lock rod 33 passes.