JPH0452285Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to a swingable gripping device installed on a construction machine.

[Conventional technology]

Figures 1, 2, and 3 show a power shovel equipped with a scooping device for picking up blocks, crushed stone, concrete, etc. for retaining wall work, etc. In the device shown in FIG. 1, a boom 3 is attached to the front part of a revolving body 2 which is rotatably attached to the upper part of a traveling body 1 so that it can be lifted up and down, an arm 4 is attached to the tip of the boom 3 so that it can be pivoted, a boom cylinder 5, an arm Each of the cylinders 6 is operated freely, and a lower claw 7 fixed to the tip of the arm 4 and a swingable upper claw 8 grip a block, etc., and the upper claw 8 is a link 9.
It is swung by a cylinder 11 via a rod 10. In the apparatus shown in FIG.
The claw 8 is opened and closed by a cylinder 14. The device in Fig. 3 is a standard power shovel equipped with a bucket 15 for crushing blocks, crushing stones, etc.
Scoop up concrete, etc. and place bucket 1 in the designated position.
It is discharged by the reversing operation in step 5. However, it has the following drawbacks. In the case of FIG. 1, since the lower claw 7 of the gripping device is fixed to the arm 4, the work is greatly limited, such as being unable to release the load when working at high places. In the case of Fig. 2, the gripping device 12 hangs freely from the tip of the arm 4, so it swings back and forth and left and right during work, making the machine unstable and dangerous. Can not. In the case of Fig. 3, only the scooping work is done using the bucket 15, and blocks, etc. must be manually put into the bucket 15, and when unloading, the bucket 15 is used for scooping.
In order to invert the bucket 15 and release it to a fixed location, it is necessary to operate the boom 3 arm 4 in conjunction with each other, and in some cases, traveling is also required. There is also the danger of falling, which poses safety issues. Furthermore, Japanese Utility Model Application Publication No. 50-74703 discloses a structure in which a bucket can be opened and closed by providing a claw-like upper lid, and Japanese Patent Application Laid-open No. 51-7707 discloses a structure in which the bucket can be rotated. However, it has not been possible to carry out the tasks of grasping, scooping, and unloading safely and easily.

[Problem that the invention attempts to solve]

The present invention was devised in view of the above circumstances, and its main problem is that when the gripping device, which has a swinging claw on the bucket, is rotated by a rotating bearing, the rotating bearing is grabbed and the arm is attached to the arm through the main body attachment part. A gripping device for construction machinery is provided, which is pivotally attached to the side, and the gripping device is connected to the lower part of the rotary bearing via a bracket, so that the bucket and the swinging claw can freely rotate without impairing the bucket work. It is about providing.

[Means to solve the problem]

In order to solve the above problems, the present invention provides (a) an arm whose base end is pivotally connected to the boom of a construction machine, a bucket cylinder whose base end is pivotally supported to the arm, and the bucket cylinder. A link having one end pivotally attached to the tip and the other end pivoting to the middle part of the arm, and a rod having one end pivoted coaxially with the pivot of the link with the bucket cylinder, (b) the above-mentioned A substantially U-shaped grip body attachment part is provided, in which the tip of the arm and the other end of the rod are pivotally attached to their respective corners, and a swing drive device is attached; (c) below the grip body attachment part, (d) A bucket is fixed downwardly to the bracket, and the middle part of the swinging claw is pivoted to the bracket so as to face the opening side of the bucket. (e) the proximal end is connected to the bracket, and
A technical measure is taken in which a hydraulic cylinder is provided which extends substantially horizontally within the bracket, and whose tip is connected to the upper end of the swinging pawl so that it can expand and contract.

[Effect]

The gripping device main body is pivotally connected by an arm and a rod, and can be displaced to a desired position by the movement of the arm and the movement of the rod and link by expansion and contraction of the bucket cylinder. The swing drive device allows the bracket and bucket to swing via the rotary bearing. Further, the rotary bearing is connected to the bucket cart and the swinging pawl via a bracket, and the hydraulic cylinder is disposed approximately horizontally within the width of the bucket to operate the swinging pawl, so that the structure does not become large. This makes it possible to work at high places using the arm, and even when the load is grabbed by the bucket and the swinging claws, the arm does not sag and does not sway during work.

【Example】

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the gripping device for construction machinery of the present invention will be described below with reference to the drawings. FIG. 4 is a side view showing an embodiment of the present invention, and FIG. 5 is a side view of the main parts thereof. An example of this gripping device that combines gripping, scooping, and digging will be explained with reference to FIGS. An arm 4 is swingably attached to the tip of the boom cylinder 5,
Each arm cylinder 6 is operable to move up and down. A gripping device 12 is attached to the tip of the arm 4 via a gripping body attachment portion 12a. Here, the grip main body attachment part 12a consists of a substantially U-shaped frame, the tip of the arm 4 is pivotally attached to one corner, and the base end of the arm 4 is attached to the other corner of the frame, and the bucket cylinder 11 and the link are attached to the other corner. The tip of a rod 10 is coaxially pivoted to the rod 9. This grip body attachment part 12a is provided with a rotating bearing 19 below.
The gear of the swing operating shaft of the rotary bearing 19 is projected into the hollow space a, and is meshed with the shaft end gear of the hydraulic motor 13 serving as a swing drive device to transmit power. Next, a bracket 20 is provided below the rotary bearing 19 so as to be pivotable by the rotary bearing 19. The bracket 20 has a bucket 15 facing downward.
are fixed, and the intermediate portions of the guiding claws 8 are pivoted by pins 16 so as to face each other on the opening side of the bucket 15. Further, the base end of a horizontally extending hydraulic cylinder 17 is connected to the bracket 20 so as to be housed within its vertical width, and the tip of the hydraulic cylinder 17 is connected to the upper end of the swing claw 8 by a pin 18. connected. Therefore, the opening and closing of the bucket bag 15 can be opened and closed by swinging the swinging claw 8 by expanding and contracting the hydraulic cylinder 17. Furthermore, by driving the hydraulic motor 13, the pivot shaft of the rotary bearing 19 can pivot the gripping device 12, which is composed of the bucket 15 and the swing claw 8, via the pivot bracket 20. Furthermore, since the gripping device 12 is supported by the arm 4 via the gripping body attachment portion 12a, the arm 4
The bucket cylinder 11
It is tilted through the link 9 and rod 10 by the operation of (see Fig. 6). As described above, according to this embodiment, in the case of block piling, crushed stone, and concrete backfilling work in retaining wall construction, the bucket 15 is used to scoop and at the same time, the rocking claws 8 are used to scoop in the blocks.
In addition, the swinging claw 8 is closed by the cylinder 17, and in order to prevent it from falling off, the gripping device 12 is freely operated to swing and rotate, so that the cargo can be reliably and safely released at a predetermined position. In addition, when backfilling crushed stone or concrete, the bucket 15 can be rotated fully (360°) by the motor 13, so it is not only possible to scoop by pushing forward or scooping by pulling toward the front, depending on the situation. It is also possible to unload the bucket 15 by rolling it over, which greatly improves work efficiency. It is also a versatile attachment that can be used to excavate ordinary soil.

[Effect of the idea]

As described above, according to the present invention, since the grip body attachment part is pivotally connected to the arm by the rod or link, the bucket bag can be displaced in a desired direction via the grip body attachment part. Further, a turning drive device can be attached to the grip body attachment part, and the bucket can be turned. Further, since the gripping device is connected to the rotary bearing by interposing a bracket, the hydraulic cylinder that swings the swinging claw can be accommodated, and it can be protected from external impact, and it is also possible to downsize and improve reliability. Then, by raising and lowering the gripping device, excavation and scooping can be performed to accurately discharge the material to the optimal position. Moreover, the gripping means consists of a bucket and a swinging claw, making it possible to perform both excavation and scraping of solid materials.
Moreover, it can also prevent solid objects from falling due to the load collapsing. Furthermore, since the gripping means is rotatable, it can be set to a position according to the work situation, and the unloading work is also stabilized.

[Brief explanation of the drawing]

Figures 1 to 3 are side views showing a conventional device, Figure 4 is a side view showing an embodiment of the present invention, Figure 5 is a side view of its main parts, and Figure 6 is a side view showing the operation of the bucket. It is. 1... Traveling body, 2... Swivel body, 3... Boom,
4...Arm, 8...Movable claw, 11...Bucket cylinder, 12...Gripping device, 12a...Gripping body mounting portion, 13...Hydraulic motor, 15...Bucket, 17...Cylinder, 20... ...Bracket.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An arm whose base end is pivotally attached to the boom of a construction machine, a bucket cylinder whose base end is pivotally supported to the arm, and one end of which is attached to the tip of the bucket cylinder. a link whose other end is pivotally connected to the middle part of the arm; a rod whose one end is pivotally connected coaxially with the axis of the link with the bucket cylinder; and a tip of the arm and the other end of the rod. A roughly U-shaped grip body attachment part that is pivoted at each corner and has a swing drive device attached thereto; a pivotable bracket that is connected to the lower part of the grip body attachment part via a rotation bearing; , a bucket fixed downwardly to the bracket; a swinging claw having a middle portion pivotally connected to the bracket so as to face the opening side of the bucket; a base end connected to the bracket;
A gripping device for a construction machine, comprising a hydraulic cylinder extending substantially horizontally within the bracket, the tip of which is connected to the upper end of a swinging claw, and capable of expanding and contracting movement. (2) The gripping body mounting portion is characterized in that the swing operating shaft of the swingable bracket is protruded from within the hollow of the substantially U-shaped frame via a rotating bearing, and is communicably connected to the swing drive device. A gripping device for a construction machine according to claim 1 of the utility model registration claim.