JPH06272273A - Connector for construction work machine - Google Patents

Abstract

PURPOSE:To easily, rapidly and removably attach or detach various operative attachments such as a crusher, bucket, etc., to/from the tip of a boom of a construction vehicle having an operative boom of a hydraulic shovel or the like. CONSTITUTION:A locking rod A1 energize by an elastic body 7 and a lock releasing means A2 provided with a pulling-back operative lever capable of moving the locking rod A1 in the lock releasing direction are constituted. The locking rod A1 and lock releasing means A2 are provided in a main connector body A. The tip of the locking rod A1 is adapted to project to and extent through the connected body B side and elastically combined therewith by the contact of the main connector body A with the connected body B.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention easily and quickly attaches or detaches various work attachments such as a crusher and a bucket to a boom tip of a construction vehicle having a work boom such as a hydraulic excavator. The invention relates to a connector for a construction work machine.

[0002]

2. Description of the Related Art Conventionally, a connecting tool has been used to attach or detach various work attachments such as a crusher and a bucket to a boom tip of a construction vehicle having a work boom such as a hydraulic excavator. ing.

As a main structure of the connecting tool, there are two members, a boom side connecting tool which is mounted on the tip end side of a boom for construction work, and an attachment side connecting tool which is mounted on an attachment side of a bucket, a crusher or the like. The boom-side connecting tool and the attachment-side connecting tool are composed of a shaft and a movable hook-shaped pawl that engages with the shaft,
By the operation on the boom side, the claw appropriately moves to engage with the shaft.

Many of the pawls are movable by a hydraulic cylinder or a spring, and the hydraulic cylinder is particularly linked to the boom side.

[0005]

Many of the above-mentioned connecting tools are
A claw is formed on either the boom-side connecting tool or the attachment-side connecting tool, and a shaft is provided on the other side, and the claw is locked to the shaft on the mating side. It is extremely difficult to confirm from the driver's seat of the construction vehicle to confirm whether or not the side coupling and the attachment side coupling are securely coupled, and a worker is required to confirm them. Become.

Further, as described above, when the movable claw and the shaft are locked, the locked state tends to be extremely loose, and therefore, the lock is extremely weak against vibration and shock, and the attachment during work is not easily attached. There is a good risk of getting out of the boom.

Further, there is also a type in which the above-mentioned claw is moved by a hydraulic mechanism. In this case, although a strong hydraulic connection is certainly possible, the entire device becomes complicated,
Therefore, not only is it extremely expensive, but there is an inconvenient problem in that if the hydraulic mechanism is once broken, it cannot be immediately repaired.

[0008]

Therefore, as a result of intensive studies to solve the above-mentioned problems, the inventor has found that the present invention is urged by an elastic body and a locking rod. It is composed of a main connecting body provided with a lock releasing means provided with a pulling operation rod movable in the releasing direction and a connected body, and the tip of the locking rod is brought into contact with the main connecting body and the connected body. Since it is a connecting tool for a construction work machine in which a projecting member is connected to the connected body side and penetrates elastically through it, various kinds of crushers, buckets, etc. can be attached to the boom tip of a construction vehicle having a work boom such as a hydraulic excavator. The work attachment can be easily and quickly attached or detached, and the attached state can be made extremely strong, which solves the above problem.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will now be described with reference to the drawings. The present invention is composed of a main connecting body A and a connected body B, and the main connecting body A is a shovel or the like. It is attached to the tip of a boom b for construction work of a construction vehicle, and the connected body B is attached to the attachment a side of an excavating bucket, a crusher, etc., and the connection between the boom b and the attachment a is connected to the main connecting body A and the connected body a. This is performed through the connecting body B.

The main connecting body A is, as shown in FIG.
A lock rod A1 is mounted on one side of the main board 1,
A main mounting portion 14 to be mounted on the tip of the boom b of the construction vehicle is formed on the other side surface.

The locking rod A1 is shown in FIGS.
As shown in FIG. 1 and the like, the lock head 2 has a cylindrical shape, a cylindrical stop collar 3 having a diameter larger than that of the lock head 2, and a guide cylinder portion 4 having a diameter smaller than that of the stop collar 3. ing.

The locking rod A1 has a main substrate 1 in the axial direction.
Of the lock rod A1 is supported by a guide body 6 so as to be slidable in the axial direction substantially parallel to the surface of the lock rod A1. The tubular portion 4 is slidably inserted.

The locking rod A1 is constructed so as to be able to reciprocate in the axial direction by supporting the guide body 6, and the outer periphery of the guide tube portion 4 of the locking rod A1 is shown in FIGS. As shown in FIG. 3, an elastic body 7 such as a coil spring is provided, and one end in the longitudinal direction of the elastic body 7 abuts on the guide body 6 and the other end abuts on the stop flange 3, so that the stop flange 3 is It is always pressed by the elastic force of the elastic body 7.

A locking arm 8 is rotatably supported on the guide body 6 by a pin or the like, and the pivot support point is referred to as a pivot support point 8p. As shown in FIGS. 1 and 6, the locking arm 8 is formed with a notch-shaped locking recess 8a on the end side in the longitudinal direction, and the locking recess 8a is locked by the locking rod A1. Locking rod 5 for locking the locked portion 5 provided on the
1 is stopped at a predetermined position against the elastic force of the elastic body 7.

Further, the locking arm 8 has a contacted portion 8b formed at an appropriate position in the longitudinal direction thereof, and the contacted portion 8b is pressed from the outside, whereby the locking arm 8b is pressed. 8 rotates around a pivot point 8p, disengages from the locked portion 5 of the locking rod A1, moves axially by the elastic force of the elastic body 7, and is connected to the connected body B. .

As shown in FIGS. 1 and 6, the contacted portion 8b is formed in a protruding shape from an appropriate portion of the locking arm 8, and a push-up portion 17 for releasing the connected body B described later is provided. It abuts and presses.

The locking arm 8 is provided with a locking spring 9 between itself and the main substrate 1, as shown in FIGS. The locking recess 8a of the arm 8 is constantly urged so that it can be locked to the locked portion 5 of the locking rod A1 in a pressed state.

As shown in FIGS. 1 and 2, the device provided on the main substrate 1 such as the locking rod A1 is covered and protected by a cover A3, specifically, the cover A3. Is a box-shaped casing 10 formed on the main substrate 1 so as to cover the locking rod A1 and the like, and the casing 10 has the casing 10 as shown in FIGS. Further, a lock head guide through hole 11 is formed so that the lock head 2 can slide.

Further, as shown in FIGS. 1 and 6, the side wall plate of the housing portion 10 in which the lock head guide through hole 11 is formed is provided with a lock connecting plate 16 of a connected body B which will be described later. A flat insertion groove 12 that can be inserted is formed.

Further, a releasing through hole 13 is formed on the top plate of the housing portion 10, and the abutted portion 8b of the locking arm 8 is located at a position corresponding to the position where the releasing through hole 13 is formed. Exists, and the releasing push-up portion 17 of the connected body B is inserted through the releasing through hole 13 and the abutted portion 8 of the locking arm 8 is inserted.
It has a structure capable of pressing b.

As described above, the main mounting portion 14 is provided on the main board 1 of the main connecting body A.
As shown in FIG. 2, the main mounting portion 14 has mounting plates 14a, 14a formed on both side edges of the main board 1 in the width direction.
The mounting holes 14b and 14b are formed in a and 14a, and when mounting on the tip of the boom b, the connecting shaft is mounted on the tip of the boom b by penetrating the mounting holes 14b and 14b. is there.

Next, in the connected body B, a lock connecting plate 16 is formed on one side surface of the slave substrate 15, and the lock head 2 of the lock rod A1 can be inserted into the lock connecting plate 16. The lock connecting hole 16a is formed.

Specifically, when the connected body B and the main connecting body A are properly connected, the lock connecting plate 16 is provided.
However, as shown in FIG. 3, when the locking rod A1 moves in the axial direction when the locking rod A1 is orthogonal to the axial direction of the locking rod A1 and the locking connecting hole 16a faces the locking head 2. The lock connecting plate 16 is provided on the sub-board 15 so that the lock head 2 can pass through the lock connecting hole 16a.

Further, the sub-board 15 has a push-up portion 17 for releasing.
Is formed, the release push-up portion 17 moves in the direction of the cover A3 of the main connecting body A, and the contacted portion 8b of the locking arm 8 is passed through the release through hole 13 of the cover A3. Is configured to be able to be pressed.

Further, a slave mounting portion 18 is formed on the slave substrate 15, and specifically, as shown in FIG. 2, the slave mounting portion 18 has slave mounting plates 18a, 18a on both lateral ends of the slave substrate 15. Is formed, and the sub-mounting holes 18 are formed in the sub-mounting plates 18a, 18a.
b, 18b are formed, and when the attachment shaft is attached to the attachment a, the connecting shaft is attached to the auxiliary attachment hole 18
It is attached to the attachment a by penetrating through b and 18b.

An engaging body A4 is provided on the main connecting body A and the connected body B, and an example of the engaging body A4 is composed of a connecting rod 19 and a hook 20. One of the body A and the body B to be connected is provided with a connecting shaft rod 19, and the other is provided with a hook 20 engageable with the connecting shaft rod 19 and provided with an insertion opening 20a. It is a thing.

In the embodiments shown in FIGS. 1 and 2, a connecting rod 19 is provided on the side of the main connecting body A, and a hook 20 is attached to the connected body B.
The connecting shaft rod 19 is formed to have a large diameter and is installed on the same surface of the main substrate 1 on which the locking rod A1 and the like are provided.
Reference numerals 1 and 21 are provided at appropriate intervals from the surface of the main substrate 1.

Next, in the unlocking means A2, the pulling back actuating rod 22 and the supporting plate 23 for supporting the pulling back actuating rod 22 are provided on the side opposite to the lock head 2 of the locking rod A1 in the axial direction. It is installed.

As shown in FIGS. 1 and 4, the pull-back operating rod 22 has a long hole 22a formed therein, and the long hole 22a has a sliding member formed on the guide tube portion 4 of the locking rod A1. The movable pin 4a can be slidably inserted freely.

As shown in FIGS. 1 and 3, a sliding support plate 24 for axially slidably supporting the guide tube portion 4 is provided in the cover A3, and the lock rod A1 is provided. Has a structure in which it can be moved in the axial direction by the guide body 6 and the sliding support plate 24. Further, the main board 1 is provided with an operation lever 22 for pulling back.
Is projected outward of the main connecting body A and is formed with an operation through hole 1a so that it can be operated from the outside. The operation through hole 1a is equivalent to the range in which the pulling operation rod 22 swings. It has a long hole shape that is the length.

By pulling the pull-back operating rod 22 axially opposite to the lock head 2 of the lock rod A1, the lock rod A1 is pulled back to the opposite side together with the sliding pin 4a. The locked state of the locking rod A1 is released.

At this time, the pull-back operating rod 22 has a long hole 22a.
Due to the formation of the locking rod A1, the sliding pin 4a formed on the guide tube portion 4 of the locking rod A1 moves along the elongated hole 22a, and moves the locking rod A1 in the axial direction together with the pulling operation rod 22. It is something to move.

Regarding the operation of the connector for a construction work machine of the present invention, first, the main connector A is attached to the tip of the boom b side of the construction vehicle, and the object B is attached to the attachment a side of a shovel, a crusher or the like. Attach to. At this time, in the main connecting body A,
As shown in FIG. 1, the locking rod A1 is fixed to the unlocked position by the locking arm 8.

Next, as shown in FIG. 5 (a), the attachment a side is fixed to the ground, and the boom b is operated from the cab of the construction vehicle to attach the hooks 20 and 20 of the main connecting body A. a is guided to the 19 connecting rods of the connected body B, and the connecting rod 1 is inserted from the insertion opening 20a of the hook 20.
Insert 9.

Next, by operating the boom b, as shown in FIG. 6, until the main connecting body A becomes substantially parallel to the connected body B with the main connecting body A centering on the connecting rod 19. When the main connecting body A contacts the connected body B substantially in parallel while continuing to rotate, the lock connecting plate 16 of the connected body B fits into the flat insertion groove 12 of the main connecting body A and is locked. Connecting hole 16a and lock head 2 are opposed to each other, and lock head 2 is connected to lock connecting hole 1
6a can be inserted.

At about the same time, the release push-up portion 17 on the side of the connected body B has a covering A of the main connecting body A as shown in FIG.
3 is inserted into the release through hole 13 formed in 3, and the release push-up portion 17 hits the contacted portion 8b of the locking arm 8,
When the locking arm 8 is disengaged from the locked portion 5 of the locking rod A1 and the locking rod A1 is unfixed, the locking rod A1 moves in the axial direction by the elastic force of the elastic body 7,
The lock head 2 is inserted into the lock connecting hole 16a, and the connecting work between the main connecting body A and the connected body B is completed.

Next, the main connecting body A and the connected body B in the connected state
In order to separate the two, the pull-back operating rod 22 of the lock releasing means A2 is operated from above the main board 1 of the main connecting body A and pulled backward, so that the sliding pin 4a loosely inserted into the slot 22a. 4, the guide cylinder 4 is pulled back together with the sliding pin 4a, and the locking rod A1 is moved in the unlocking direction, as shown in FIG.

The lock rod A1 is pushed back to the lock release position, the lock head 2 is disengaged from the lock connecting hole 16a, and the lock rod A1 is engaged with the lock recess 8a of the lock arm 8. The stopper 5 reaches, and the locking recess 8 is reached.
a and the locked portion 5 are locked, and the locking rod A
1 is fixed to the unlocked position, and the separation of the main connecting body A and the connected body B is completed.

As described above, the main connecting body A is mounted on the tip of the boom b and the connected body B is mounted on the attachment a side in many cases, but it is not necessarily limited to this embodiment. The main connecting body A may be attached to the attachment a and the connected body B may be attached to the tip of the boom b.

The main connecting body A and the connected body B are shown in FIG.
As shown in (b), the tip of the boom b and the attachment a may be integrally formed in advance.

Further, although the main connecting body A is often provided with two locking rods A1 and A1, there is an embodiment in which one locking rod A1 is provided (see FIG. 8). .

As shown in FIGS. 1 and 2, a temporary stopper 25 is provided on the main substrate 1 of the main connecting body A, and the pulling-back operating rod 22 is used for temporary fixing. There is also an embodiment in which the projection 22b is provided and can be locked to the temporary stopper 25 thereof.

[0043]

According to the present invention, the lock releasing means is provided with the lock rod A1 urged by the elastic body 7 and the pulling back operating rod 22 capable of moving the lock rod A1 in the lock releasing direction. It is composed of a main connecting body A provided with A2 and a connected body B, and when the main connecting body A and the connected body B come into contact with each other, the tip of the locking rod A1 protrudes and penetrates to the connected body B side. By using the connection tool for construction work machines that is elastically connected, the main connection body A and the connection target body B can be instantly connected, and secondly, various effects such as the lock can be released extremely easily. Play.

To describe the above effect in detail, the locking rod A1 provided on the main connecting body A is such that when the main connecting body A and the connected body B are in contact with each other, the locking rod A1 projects toward the connected body B side. By penetrating, the main connecting body A and the connected body B can be connected almost instantaneously.

Further, in the connecting work between the main connecting body A and the connected body B, the locking rod A1 protrudes toward the connected body B side only by bringing the main connecting body A and the connected body B into contact with each other. Since it penetrates, the operation can be extremely simple, and since reliable connection is possible, it is not necessary to confirm the connection state, and the worker involved in it can be eliminated.

In the connected state, the locking rod A1 provided on the main connecting body A projects toward the connected body B and penetrates it.
Since they are connected, they are extremely strong against vibration and impact in the horizontal and vertical directions of the locking rod A1 in the axial direction, and are more resistant to vibration and impact than the conventional locking type with pawl and shaft. On the other hand, it can be made extremely strong and durable.

Further, the locking rod A1 is made of an elastic material such as a spring so as to project and penetrate to the connected body B side, so that the boom b can be connected to both the main connected body A and the connected body B. It can be attached to the tip, and like a locking device equipped with a hydraulic mechanism, it is attached to the boom b side and compared to the conventional type connector that has to be connected to the hydraulic mechanism of the construction vehicle. There is an advantage that the mounting means can be remarkably simple.

Next, since the lock rod A1 is urged by the elastic body 7, when the lock rod A1 is once locked to the lock rod A1, a pressing force is applied by the urging force of the elastic body 7. Therefore, it is possible to maintain an extremely strong locked state until the lock is released.

Next, the unlocking means A2 is provided with a pulling-back actuating rod 22 on the rear side of the locking rod A1, which allows the locking rod A1 to move in the axial direction. Only by appropriately swinging the pull-back operating rod 22 on the pull-back operating rod 22, a worker can operate the locking rod A1.
Since the structure can be pulled back to the unlocking side, the unlocking work can be performed very easily.

[0050]

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a main connection body and a connection body.

FIG. 2 is a perspective view showing a state in which a main connecting body and a connected body are separated from each other.

FIG. 3 is a vertical plan view of the present invention.

FIG. 4 is an enlarged view of a main part of a lock releasing means.

FIG. 5A is a schematic view showing a state in which an attachment is attached to a boom tip. FIG. 5B is a schematic view in which a connected body is integrally provided on the attachment.

FIG. 6 is a vertical cross-sectional side view showing a state in which the main connecting body and the connected body are engaged at one end in the front-rear direction.

FIG. 7 is a vertical plan view showing a state in which the main connecting body and the connected body are completely locked.

FIG. 8 is a vertical plan view of the present invention in which the lock head of the locking rod is one base.

[Explanation of symbols]

 A ... Main connecting body A1 ... Locking rod 7 ... Elastic body 22 ... Pulling back operating rod A2 ... Lock releasing means B ... Connected body

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kunihiko Matsui, 314 Chikusacho, Hanamigawa-ku, Chiba City, Sakado Works Co., Ltd. (72) Inventor, Isamu Nagayoshi, 314, Chikusacho, Hanamigawa-ku, Chiba City, Sakado Works (72) Inventor Toshiyuki Kuno, 314 Chikusacho, Hanamigawa-ku, Chiba City, Sakado Factory Co., Ltd. (72) Masayuki Asai, 314, Chikusacho, Hanamigawa-ku, Chiba City, Sakado Factory, Ltd. (72) Toshifumi Tojima, Chikusa-cho, Hanamigawa-ku, Chiba City 314 Address Sakado Factory Co., Ltd.

Claims (1)

[Claims] 1. A locking rod urged by an elastic body,
A main connecting body provided with a lock releasing means provided with a pulling back operating rod capable of moving the locking rod in the lock releasing direction, and a connected body, and the main connecting body and the connected body are in contact with each other. The connecting tool for construction work machine, wherein the tip of the locking rod protrudes toward the connected body side and penetrates elastically.