JPH0619648Y2 - Work attachment connection unit - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention connects the swing lever to a connecting operation position on one side of a swing locus of an operating swing lever with respect to a connector of a work attachment. First and second locking portions having recesses that lock at the release operation position are provided, and the rocking lever is substantially orthogonal to the rocking locus so as to switch and move to the first and second locking portions. The present invention relates to a connecting operation portion of a work attachment that is elastically flexible and deformable in a direction to perform.

[Conventional technology]

Conventionally, in the above-mentioned connecting operation part, the swing lever is formed so as to be directly engaged with the first locking part or the second locking part.

[Problems to be solved by the invention]

However, in order to facilitate the switching movement of the swing lever to the first and second locking portions, it is necessary to make the recesses of the first and second locking portions shallow so that the swing lever for the switching movement is required. It is sufficient to reduce the amount of elastic flexural deformation, but if the machine body vibrates or accidentally contacts the rocking lever, the rocking lever easily disengages from the first and second locking portions and switches. However, there is a risk that the attachment will be disconnected. On the other hand, the recesses of the first and second locking portions are deepened to increase the amount of elastic flexural deformation required for the swing lever for switching movement. In this case, it is possible to prevent the swing lever from being switched by accident, but there is a drawback that the switching operation becomes difficult.

An object of the present invention is to prevent the swing lever from being accidentally disengaged from the first and second locking portions while facilitating the switching operation of the swing lever.

[Means for solving problems]

The characteristic configuration of the connecting operation portion of the work attachment according to the present invention is such that the lever fixing cylinder member is slidably attached to the swing lever between an engaging position and a non-engaging position with respect to the first and second locking portions. The tubular member is fitted and the peripheral portion of the tubular member is formed so as to project from the swing lever toward the first and second locking portions, and the function and effect thereof are as follows.

[Action]

That is, when the rocking lever is switched to the first and second locking portions, the cylinder member is slid to the non-engaging position with respect to the first and second locking portions. After the rocking lever is locked to the first locking portion or the second locking portion while making the switching operation good, the tubular member is simply slid to the engaging position for the first and second locking portions. Since the peripheral portion of the tubular member projects toward the first and second locking portions from the swing lever,
If you try to swing the swing lever in that state,
The necessary elastic flexural deformation amount increases, and it becomes difficult to remove the swing lever from the first and second locking portions.

[Effect of device]

Therefore, without changing the operability for switching the rocking lever, it is possible to prevent the risk that the rocking lever is accidentally switched and the attachment falls out due to rocking or contact of the machine body. It has become possible to secure. In addition, since it is only necessary to externally fit the tubular member on the swing lever, it is possible to easily and inexpensively modify the structure for improving safety.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the drawings.

As shown in FIG. 4, a front vehicle body (2) having a shovel device (1), a boarding operation part (3), a driving part (4), and a backhoe device.
A rear vehicle body (6) equipped with (5) is connected so as to be relatively swingable around a vertical axis (P), and a front and rear vehicle body (2) is provided by a hydraulic cylinder (8) that is telescopically operated by a steering handle (7). The excavator loader is constructed so that (6) can be relatively rocked.

In the shovel device (1), the buckets are attached to the tips of the left and right arms (9) mounted on the front vehicle body (2) so as to be vertically swingable.
Hydraulic cylinder attached to the arm (9) by connecting the connecting tool (11) to the (10) with the left and right connecting parts (12) so that it can swing back and forth.
The connector (13) and the connector (11) are pin-connected by the connecting portion (14) at the center of the upper portion, and the connector (11) is configured to be tiltable.

As shown in FIGS. 1 and 2, a tapered engaging portion (15) is formed on the upper portion of the connecting tool (11), and the locking piece (1) is attached to the bucket (10).
The engaging part of the connector (11) is inserted into the deep fitting part formed by 6).
(15) is inserted from below and fitted, and locking pins (17a) and (17b) are provided at the left and right lower parts of the coupling tool (11) so that they can be slid left and right, respectively, and the bucket Insert both locking pins (17a) into the pin holes formed in the left and right brackets (18) attached to (10),
(17b) are individually fitted and the bucket (10) is detachably locked and connected to the connecting tool (11).

Insert the swing lever (19) with the operating end extended upwards into the connector (1
1) Behind the lock pin (17a), mount it to the rear of the lock pin (17a) and swing it to the left and right with the shaft support (20).
(21a) and crank with respect to the other locking pin (17b)
(21b) and the rod (21c) are interlocked with each other, and both locking pins (17a),
It is configured such that the locking action state in which (17b) is projected to the left and right is switched to the locking release state in which the coupling tool (11) is retracted to the rear side by swinging operation to the coupling release operation position.

A coil spring (22) is attached to each of the locking pins (17a) and (17b) so as to maintain them in the locking state, and the coil spring (22) is attached near the mounting portion of the swing lever (19) and the crank ( 21b), a plate-like portion (23) which covers the upper part of one end of the rods (21a), (21c) and is arranged on one side of the swing locus of the swing lever (19), the coupling tool (11) Attached to the first and second locking portions (23A) and (23B) having recesses for locking the swing lever (19) near the operating end between the connecting operation position and the connection releasing position. The rocking lever (19) is formed in (23) and is elastically deformable in a direction substantially orthogonal to the rocking locus so that the rocking lever (19) can be switched between the first and second locking portions (23A) and (23B). Has been formed.

As shown in FIG. 1, at the upper end of the rocking lever (19), an engaging position for the first and second locking portions (23A), (23B) and a non-engaging position above the engaging position. A lever-fixing tubular member (24) is externally fitted so as to be vertically swingable, and is also used as a grip portion for swinging the swing lever (19).

The cylinder member (24) is externally fitted to the swing lever (19) so as to project upward from the upper end of the swing lever (19) as the tubular member (24) is moved from the engaged position to the non-engaged position. At the same time, the roll pin (25) engages with the swing lever (19) and the roll pin (25) engages with the tubular member (24) to positionally lock the swing lever (19) at the protruding position. A groove (26) is formed, and as shown in FIG. 3, the tubular member (24) is formed to have a thickness that elastically deforms the swing lever (19) at the connection operation position and the connection release operation position. I am doing it.

That is, the rocking lever (19) is moved to the first and second locking portions (23A), (23
When switching to B), the tubular member (24) is in the disengaged position, and
Move the rocking lever (19) upward from the upper end and
4) Grasp and swing the rocking lever (19) while elastically deforming it to lock the rocking lever (19) to the first locking portion (23A) or the second locking portion (23B). After that, the tubular member (24) is lowered to its lower locking position by its own weight to move the first locking portion (23A) or the second locking portion (23A).
When the rocking lever (19) is locked to the locking portion (23B), it is firmly locked and held by the first and second locking portions (23A) and (23B) while being elastically deformed and deformed. (Fig. 3) And, in this state,
Since the upper ends of the tubular member (24) and the swing lever (19) do not project much upward, the risk of accidentally coming into contact with the swing lever (19) is reduced.

[Another embodiment]

The present invention can be applied to work vehicles other than shovel loaders,
Also, a fork or the like may be used instead of the bucket (10),
They are collectively called work attachments.

As shown in FIG. 5, the tubular member (24) has a swing lever (1
It may be attached in a state in which it is upwardly biased by the spring (27) with respect to 9). In this case, for example, the first and second locking portions (23A), ( 23B) engaging part (2
8) is formed, and the non-engaging part (29) is formed in the upper and lower intermediate parts, and the engaging part (28) normally engages with the first and second locking parts (23A), (23B) When the switching operation is performed, the tubular member (24) is pushed downward so that the non-engaging portion (29) is positioned at the level of the first and second locking portions (23A) and (23B), and the swing lever is moved. It may be configured such that (19) is rocked.

It should be noted that reference numerals are added to the claims of the utility model for convenience of comparison with the drawings, but the present invention is not limited to the structure of the accompanying drawings by the entry.

[Brief description of drawings]

The drawings show an embodiment of a connecting operation portion of a work attachment according to the present invention. Fig. 1 is a rear view showing a partial cross section of the attachment, Fig. 2 is a vertical side view of the attachment, and Fig. 3 is a partial cross section. FIG. 4 is a side view of the entire shovel loader, and FIG. 5 is a rear view of the main portion showing a partial cross section of another embodiment. (10) …… Attachment, (11) …… Coupling, (19) …… Swing lever, (23A), (23B) …… First and second locking parts, (24)…
... Cylinder member.

Claims (2)

[Scope of utility model registration request] 1. The swing lever (19) is connected to a coupling operation position and uncoupled to one side of a swing locus of a swing lever (19) for operation with respect to a coupler (11) of a work attachment (10). First and second locking portions (23A), (23B) having recesses for locking at the operating position
Is provided, and the swing lever (19) is formed so as to be elastically flexible and deformable in a direction substantially orthogonal to the swing locus so as to switch and move to the first and second locking portions (23A) and (23B). In the connection operation part of the working attachment, the lever fixing cylinder member (24) is placed in an engaging position and a non-engaging position with respect to the first and second locking parts (23A), (23B). Sliding freely, the rocking lever
(19) is externally fitted, and the peripheral portion of the tubular member (24) is formed by protruding from the swing lever (19) toward the first and second locking portions (23A), (23B). The connection operation part of the work attachment. 2. The utility model registration according to claim 1, wherein the tubular member (24) is formed to have a thickness that allows the rocking lever (19) to elastically bend and deform at the connecting operation position and the connection releasing position. Connection operation part of the work attachment of.