JPH0242715Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a work implement attachment device for a lifting work device mounted on a tractor.

(Prior art) In order to easily load earth, sand, compost, etc. onto a trailer or manure spreader using a tractor, there is a device in which a lifting device is attached to a tractor via a three-point link, etc. Publication No. 135355 (Sho 60-135355).

In the lifting work device, the vertically installed guide frame has a
A lifting platform is provided that can be raised and lowered, and a mounting body that projects forward from the lifting platform is provided with work tools such as buckets and forks that can be attached and detached.

(Problems to be Solved by the Invention) In the conventional example, in order to facilitate attachment and detachment of the work implement, there is a gap between the mounting body protruding forward from the lifting platform and the back of the work implement body. It was equipped with a quick hitch mechanism.

According to this, it took time to attach and detach the hitch, and the number of parts increased.

In addition, the complicated shape of the hitch makes it difficult to manufacture, leading to increased costs such as mold costs.

Furthermore, the load point moved forward by the amount of the hitch, making it easier to lift and lower.

The object of the present invention is to easily and reliably attach and detach a working tool without using a hitch mechanism.

(Means for Solving the Problems) The technical means taken by the present invention to achieve the above-mentioned object are characterized by a vertically installed guide frame 1 in which a lifting platform 4 can be raised and lowered freely. One end of a tilt cylinder 11 is attached to a mounting body 6 which is provided and projects forward from the lifting platform 4, and an insertion hole 14 for a fulcrum pin 13 is formed. A fulcrum pin 13 with a protruding arm 20 inserted into the insertion hole 14 from the lateral direction
The other end of the tilt cylinder 11 is connected to the arm 20, and the arm 20 has a cylinder 22 through which the fulcrum pin 13 is inserted.
is fixed, and both ends of the cylinder length of the cylinder 22 protrude outward from both outer surfaces of the arm 20 to form an engaging part 23 .
A guide body 27 is fixed to guide the engaging portion 23 and hold the engaging portion 23 in a state where the insertion hole 14 and the insertion tube 22 are aligned.

(Function) To attach the work tool 19 to the mounting body 6 protruding forward from the lifting platform 4, connect one end of the tilt cylinder 11 to the upper part of the mounting body 6 with the mounting pin 15, and then connect the tilt cylinder 11 to the top of the mounting body 6. the other end of the arm 20
Connect with the mounting pin 25.

In this state, the arm 20 of the work tool main body 19 is inserted into the mounting body 6, and the insertion hole 1 formed in the mounting body 6 is inserted into the mounting body 6.
4 and the insertion tube 22 fixed to the arm 20 are aligned.

This allows the engaging portion 23 of the insertion tube 22 to be connected to the guide body 2.
Centering is achieved by being guided by the engaged part (guiding surface) 27A of No. 7, and alignment is achieved by holding the engaging part 23 by the engaged part (guiding surface) 27A. In this state, the fulcrum This is done by inserting the pin 13 into the insertion hole 14 and the insertion tube 22 from the lateral direction and preventing it from coming out.

Removal is done in the reverse order.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

Reference numeral 1 denotes a vertically installed guide frame, which is attached to the rear of the tractor 2 shown in FIG. 7 by a link connection mechanism 3 shown in FIG.

Reference numeral 4 denotes an elevating table, which is movable up and down by a guide roller 5 fitted into a guide frame 1, and is raised and lowered by an elevating cylinder (not shown), an elevating rope, etc.

Reference numeral 6 denotes a mounting body, the upper part of which is engaged with a guide frame 7 projecting forward from the lifting platform 4 with a hook 8;
The mounting body 6 is attached by tightening and loosening bolts 10 in a state in which the lower part is engaged with a hook 9 and positioned in the front-rear direction, and the mounting body 6 has a pair of left and right parts as shown in FIG.

The mounting body 6 is U-shaped in plan and trapezoidal in side view, and has a tilt cylinder 1 on the top thereof.
1 and an insertion hole 14 for a fulcrum pin 13 are formed in the lower part.

One end of the tilt cylinder 11 is connected by a headed pin 15 inserted laterally into the mounting hole 12, and the head of the headed pin 15 is connected to the mounting body 6 with a bolt 16.
It is attached to the outer surface of the holder and is secured by a retaining pin 17.

The working tool 18 is exemplified as a bucket bag in this example, and an arm 20 that projects rearward is fixed to the back of the working tool main body 19.

This arm 20 corresponds to the mounting body 6, and there are a pair of left and right arms, but since the configuration is the same, only one arm will be explained below.

The arm 20 consists of a pair of left and right side plates 21, and an insertion tube 22 for a fulcrum pin 13 that connects the side plates 21 to each other is fixed in the intermediate portion in the longitudinal direction of the arm, and both ends of the insertion tube 22 are connected to each other. Side plate 2
An engaging portion 23 is protruded from the outer surface of 1 (see FIGS. 2 and 3).

Further, the protruding end of the arm 20 has a connecting hole 24 at the other end of the tilt cylinder 11.
The connecting tube 11A of the cylinder 11 is aligned with the connecting tube 11A, and connected by a headed pin 25, and is prevented from coming out by a retaining pin 26.

Here, one end of the tilt cylinder 11 is connected to the mounting body 6 by a head pin 15, and the other end of the tilt cylinder 11 is connected to the arm 20 by a head pin 25, and connected to the mounting body 6 by a fulcrum pin 13. Arm 20 will be attached.

For this reason, in this embodiment, the guide body 2 has approximately L-shaped guide surfaces 27A on the edges of the insertion holes 14 on both side plates of the mounting body 6, as shown in FIGS. 2 and 4.
7 is fixed, and the engaging portion 23 aligns the insertion hole 14 and the insertion tube 22 with the guide surface 27A, and is held in the aligned state, and in this held state, the fulcrum pin with the head 13 is inserted through it and is prevented from turning by a bolt 28 and from being removed by a pin 29.

In addition, when connecting with the fulcrum pin 13, it is desirable that the bushing 30 be inserted into the insertion tube 22.

Also, when connecting the connecting cylinder 11A of the tilt cylinder 11 to the arm 20 with the headed pin 25, the fifth
As shown in FIG. 6, a guide surface 31 that aligns and holds the connecting cylinder 11A on the lower surface side of the connecting hole 24
It is also possible to fix the guide body 31 having A to the inner surface of the side plate 21.

In addition, in this embodiment, the work tool 18 can also be attached in the following manner.

The work implement main body 19 is placed on the ground, and the lifting platform 4 is raised while the insertion tube 22 fixed to the arm 20 and the insertion hole 14 of the mounting body 6 are aligned vertically. Then, the engaging portion 23 of the insertion tube 22 is guided and engaged with the guide surface 27A of the guide body 27, and the insertion hole 14 and the insertion tube 22 are aligned and maintained in this state.
is inserted to connect the arm 20 to the mounting body 6.

Next, when the tilt cylinder 11 is extended and the connecting cylinder 11A is pressed against the guide body 31, the connecting cylinder 1
1A is engaged with the guide surface 31A of the guide body 31, the work implement main body 19 is rotated in the lifting direction around the fulcrum pin 13, and the connecting cylinder 11A and the arm 20
is protruded downward from the lower surface of the attachment body 6, so the connection can be made by inserting the headed pin 25 in this state.

8 to 11 show a fork as the working tool 18 attached to the guide frame 7 of the lifting platform 4. FIG.

The fork 32 has an L-shape in side view and includes a rising portion 33 and a claw portion 34.
3 has a pair of upper and lower hooks 33A.

The forks 32 have rising parts 33 welded together 35
However, the claw portion 34 is made up of three fork plates that are stacked on top of each other and are movable relative to each other, and the central portion of the fork plates has a non-slip portion 36 consisting of an uneven portion on the upper surface. , the upper surfaces of the left and right portions are flat surface portions 37, and when no load is acting on the claw portions 34, the flat surface portions 37 become the non-slip portions 36.
It is located at a higher position (see Fig. 10), and the claw portion 34
When a load is applied to the bag, the anti-slip portion 36 engages with the lower surface of the baggage 38 (see FIG. 11).

That is, the fork plate is made of spring steel and can be deformed as described above by elastic deformation, so that the flat surface portion 37 provides good sliding when loading and unloading cargo, and the non-slip portion 36 during transportation (FIG. 11). This prevents the luggage from sliding down.

(Effect of the invention) According to the invention, the guide body 27 having the guide surface 27A is fixed to the edge of the insertion hole 14 of the mounting body 6,
An insertion tube 22 is fixed to an arm 20 protruding from the work tool main body 19, and engaging portions 2 are provided at both ends of the insertion tube 22.
3 to align the engaging portion 23 with the guide surface 27A and maintain the aligned state, it is extremely easy to insert and remove the fulcrum pin 13, that is, the attachment and detachment of the work implement body 19. You can do it easily and reliably.

Further, since there is no need to employ a conventional quick hitch mechanism, it becomes possible to arrange the work tool main body 19 close to the mounting base, and the load point is brought closer, allowing stable work.

Further, since the tilt cylinder 11 and the arm 20 can be connected after first connecting the arm 20 with the fulcrum pin 13, matching can be ensured.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a side view of the main parts, FIG. 2 is a perspective view of an assembled and disassembled state, FIG. 3 is a sectional view taken along the line A-A in FIG. 1, and FIG. Figure 3 B-
Figure 5 is a sectional view taken along the line C-C in Figure 1, Figure 6 is a view taken along the line D-D in Figure 5, Figure 7 is an overall rear elevational view, and Figure 8 is a fork. FIG. 9 is a perspective view of the fork, and FIGS. 10 and 11 are side views of the fork with and without a load. 1... Guide frame, 4... Elevating platform, 6... Mounting body,
11...Tilt cylinder, 13...Fully pin, 1
9... Work tool main body, 22... Insertion tube, 23... Engagement portion, 27... Guide body.

Claims (1)

[Claims for Utility Model Registration] A vertically installed guide frame 1 is provided with an elevating platform 4 that can be raised and lowered freely, and one end of a tilt cylinder 11 is attached to a mounting body 6 that projects forward from the elevating platform 4. An insertion hole 14 for a fulcrum pin 13 is formed therein, and an arm 20 protruding rearward from the work implement body 19 can freely move up and down by the fulcrum pin 13 inserted into the insertion hole 14 from the lateral direction. It is said that
The other end of the tilt cylinder 11 is connected to the arm 20, and the arm 20 has an insertion tube 22 for the fulcrum pin 13.
is fixed, and both ends of the cylinder length of the cylinder 22 protrude outward from both outer surfaces of the arm 20 to form an engaging part 23 .
A work tool attachment device for an elevating work device, characterized in that a guide body 27 is fixed to guide the engaging portion 23 while guiding the insertion hole 14 and the insertion tube 22 in a state in which they are aligned.