JPH0138156Y2 - - 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> As a mounting device for mounting a working machine via a three-point linkage mechanism of a vehicle, there is a mounting device shown in Utility Model Application No. 58-71767 (Kokoku Utility Model Publication No. 63-42008). In this system, a pair of left and right connected parts are attached to the working machine, and hook parts provided on the left and right lower links of the vehicle are engaged with the connected parts, and the engagement is held by a pin. After that, the top link of the vehicle was attached to the work equipment side.

<Problems to be solved by the invention> In the conventional system described above, if the tractor and work equipment are even slightly misaligned to the left or right, it is difficult to engage the hook part and the connected part because there is a pair of left and right parts. It was hot. Further, since the top link is attached to the working machine, it is necessary to attach and detach the top link every time the working machine is attached and detached, which is time-consuming. Further, the work of inserting and removing the pin that maintains the engagement between the hook portion and the connected portion is also troublesome.

The present invention aims to solve the above problems.

<Means for Solving the Problems> The present invention is characterized by the technical measures taken to solve the problems of the prior art. Engagement body 1
1, and a male engaging body 11 on the working machine 7 side.
The female engaging body 12 of the male engaging body 11 is provided with a substantially mountain-shaped female engaging body 12 that is removably engaged from the lower side.
In the work equipment mounting device equipped with a locking means for preventing the workpiece from being disengaged downwardly, the locking means comprises:
A locking rod 33 supported above the top opening 29 of the female engaging body 12 so as to be freely protrusive and retractable, a biasing spring 35 that urges the locking rod 33 in the protruding direction, and a releasably preventing protrusion of the locking rod 33. , the female engaging body 12 is provided with a regulating body 39 that contacts the protruding end surface of the locking rod 33 by swinging downward due to its own weight, and projects upward from the top opening 29 and swinging the regulating body 39 upward to release. A lock body 25 is provided on the top of the male engaging body 11, and the lock body 25
A lock hole 26 is formed through which the lock rod 33 passes.

<Operation> Since the approximately mountain-shaped male engaging body 11 provided in the three-point linkage mechanism 4 is engaged with the approximately mountain-shaped female engaging body 12 provided on the working machine 7 side from below,
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 and comes into contact with the regulating body 39 .
9 is swung upward, the restriction by the regulating body 39 is released, the locking rod 33 is urged in the protruding direction, and when the locking hole 26 of the locking body 25 and the locking rod 33 are aligned, the locking hole is 26 locking rod 33
The lock is penetrated under the bias of the biasing spring 35, and a locked 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.

Further, since the regulating body 39 prevents the locking rod 33 from protruding by swinging downward due to its own weight, the locking rod 33 is automatically and reliably locked by simply recessing the locking rod 33 from above the top opening 29 of the female engaging body 12. 33
can prevent protrusion.

<Example> Hereinafter, an example of the present invention will be described based on the drawings.

In FIGS. 1 to 9, reference numeral 1 denotes a traveling vehicle 1, exemplified by a tractor, and a hydraulic device 3 for lifting and lowering a working machine having a pair of left and right lift arms 2 is mounted on the rear upper surface of the vehicle. 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 constituted by 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. Support plates 30 are erected 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 is prevented from returning by the biasing spring 35 of the locking rod 33. 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.

On the inner surface of one support plate 30, a seventh
As shown in the figure and FIG. 8, a regulating body 45 is attached. The regulating body 45 has a rectangular plate-like main body 4.
6 and a cylinder 47 fixed along the upper edge of the main body 46.
It is equipped with The head bolt 48 is loosely inserted into the cylindrical body 47 and is screwed onto the upper end of the inner surface of the support plate 30, so that the regulating body 45 can swing freely. Here, the clockwise swing of the regulating body 45 in FIG. 7 is regulated by the first stopper pin 49,
The counterclockwise swing is regulated by the second stopper pin 50, so that the regulating body 45 swings downward (counterclockwise in FIG. 7) above the lock body 25 due to its own weight, as shown by the imaginary line. It is said that it is pushed up by the lock body 25 and swings upward (clockwise in FIG. 7). In addition, the second stopper pin 50
The main body 46 is positioned on the hole center axis of the insertion hole 31 in a state where its swing is restricted. As a result, the regulating body 45 comes into contact with the end face of the locking rod 33 due to its downward swing due to its own weight.
This prevents the locking rod 33 from protruding above the top opening 29, and allows the locking rod 33 to freely move in and out by swinging upward.
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 the forklift 7 is attached to the vehicle 1, the locking rod 33 is pulled out and the regulating body 45 is swung downward by its own weight, as shown in FIG. A regulating body 45 is brought into contact with the end face to prevent protrusion. In this state,
Position the vehicle 1 on the front side of the forklift 7,
After that, the hydraulic device 3 is operated to release the male engaging body 1.
1 is lowered, the vehicle 1 is moved backward in this state, and the male engagement body 11 is moved to the lower side of the female engagement body 12 provided on the forklift 7 side. Next, the hydraulic device 3 is operated to raise the three-point linkage mechanism 4, so that 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 male engaging body 11 and the female engaging body 12 are formed in a substantially mountain shape, even if there is a positional shift in the left and right direction of both the frames 13 and 27, the frame body 13 will remain in the fork position. While lifting the lift 7 from below, it is easily fitted into the frame 27 as shown in FIG.
7, movement in the front-back, left-right, and upward directions is prevented. Further, during the fitting process, the locking body 25 of the male engaging body 11 is projected upward from the opening 29 of the female engaging body 12, and the upper end of the locking body 25 pushes up the regulating body 45 and causes it to swing upward. Then, the contact between the regulating body 45 and the end face of the locking body 25 is released, and the locking 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 match, 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 lock hole 26 of the male engagement body 11, and the downward movement of the frame body 13 of the male engaging body 11 is also restricted, and both the frame bodies 13 and 27 are brought into a locked state. That is, lock body 25, lock rod 3
3. Each support plate 30 and the like 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.
By engaging and holding the locking recess 38 of 7 and lowering the three-point linkage mechanism 4 in the unlocked state, the forklift 7 can be separated from the vehicle 1, and the detachment operation can be easily performed.

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.

<Effects of the invention> According to the invention, the substantially mountain-shaped male engaging body provided in the three-point linkage mechanism is engaged from the lower side with the substantially mountain-shaped female engaging body provided on the work machine side. 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 lock body and the lock rod provided on the female engaging body are automatically engaged in a locked state, making installation work easy, and even when detached, the engagement between the lock rod and the lock body is released. By moving the male engaging body downward, it can be easily disengaged, and the disengagement work can be easily performed. Moreover, since the regulating body releasably prevents the protrusion of the locking rod by swinging due to its own weight, the structure of the locking mechanism is simple and reliable, and failures are less likely to occur.

[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, 45...Regulating body.

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
3 in the projecting direction, and a regulating body 39 that contacts the protruding end surface of the locking rod 33 by swinging downward due to its own weight in order to releasably prevent the locking rod 33 from protruding. A lock body 25 provided on the female engaging body 12 and protruding upward from the top opening 29 to swing the regulating body 39 upward to release it.
is provided on the top of the male engaging body 11, and a lock hole 26 is formed in the lock body 25, through which the lock rod 33 passes.