JP2012172331A - Bucket device with grapple - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bucket device with a grapple, which is excellent in strength and opening/closing durability of the grapple, is composed of a simple structure, and has a high degree of freedom of design.SOLUTION: The bucket device with a grapple includes: a bucket freely turnably attached to a distal end of a vertically turning arm of a civil engineering/construction machine; and a grapple freely turnably pivoted to an arm side proximal end of the bucket. An inner stopper for regulating the range that an open end side of the grapple turns to the inner side of the bucket is provided on the inner side of the bucket, and a turning stopper for regulating the range that the grapple turns in the direction of opening from a bucket opening is attached to a turning shaft of the grapple.

Description

  The present invention relates to a bucket device with a grapple that can be used for both excavation of earth and sand and a grapple such as wood, which is attached to the arm tip of a civil engineering and construction machine.

A bucket device with a grapple attached to the tip of an arm of a civil / construction machine that rotates in the vertical direction is known as disclosed in Patent Documents 1 and 2.
However, although the bucket device with a grapple disclosed in Patent Documents 1 and 2 restricts the grapple from entering the bucket with a stopper, the grapple does not regulate the rotation range in the direction in which the grapple opens from the opening of the bucket. Absent.
Further, the grapple opening and closing mechanism disclosed in Patent Documents 1 and 2 has a structure in which the tip of the operating arm connected to the rotation shaft of the grapple is connected to the cylinder rod. When the thickness of the wood or the like is not uniform and a twist occurs between the left and right grapples, the torsional deformation is directly applied to the rotating shaft.
Thus, in a mechanism in which a torsional deformation is directly applied to the rotation shaft, there is a possibility that the opening and closing of the grapple may be hindered.

Japanese Patent No. 3567961 Japanese Patent Laid-Open No. 11-181817

  An object of the present invention is to provide a grapple bucket device having excellent grapple strength and open / close durability, having a simple structure, and high design freedom.

A bucket device with a grapple according to the present invention includes a bucket that is pivotally attached to a tip end of an arm that pivots up and down in a civil engineering / construction machine, and a grapple pivotally attached to a base end portion on the arm side of the bucket. An inner stopper for restricting the range in which the open end side of the grapple rotates to the inside of the bucket, and a rotation for restricting the range in which the grapple rotates in the opening direction from the bucket opening. The moving stopper is attached to the rotation shaft of the grapple.
Here, the left-right direction refers to the width direction of the bucket in a state where the bucket device is attached to the arm tip of the construction machine, and the front-rear direction refers to the front end side of the bucket as the front and the attachment base end side of the bucket as the rear. .

  In the present invention, the grapple includes a left and right grapple arm, a connecting plate connecting the open end sides of the left and right grapple arms, and a proximal end side of the left and right grapple arms, and a front portion of the pivot shaft. It is preferable that the connection part is connected with the piston rod of the opening / closing cylinder of the grapple in the front-rear direction.

  The bucket device with a grapple according to the present invention regulates the position at which the grapple enters the inside of the bucket by the inner stopper, and connects the position where the grapple rotates outward from the opening of the bucket to the rotation shaft side of the grapple. Therefore, the rotation range of this grapple can be controlled without relying only on the stroke of the piston rod of the cylinder that opens and closes the grapple, and the stability is improved.

  In addition, by connecting the vicinity of the base ends of the left and right grapple arms with a connecting portion in the left and right direction located on the front side of the rotation shaft, the left and right grapple arms can be prevented from being twisted, and the rotation stopper is attached to the grapple. By connecting to the rotating shaft, there is also an effect of preventing breakage of the connecting portion connected to the piston rod of the cylinder.

The perspective view of a bucket apparatus with a grapple is shown, (a) shows the state where the tip of the grapple has entered the inside of the bucket, and (b) shows the state where the partial grapple is open. The side sectional view of a bucket device with a grapple is shown, (a) is a state where the tip of the grapple is in contact with the inner stopper (12a, 12b) inside the bucket, (b) is a state where the grapple is opened, The state which the provided rotation stopper (27, 28) contact | abutted to the stopper (31a, 31b) provided in the proximal end flange of the bucket is shown. The enlarged view of a stopper mechanism part is shown, (a) shows the state where the grapple is closed, and (b) shows the state where the grapple is opened. The state which grappled wood (W) with the grapple arm and the bucket is shown.

  Although the structural example of the bucket apparatus with a grapple which concerns on this invention is demonstrated based on drawing below, a design change can be suitably carried out in the range of the meaning of this invention.

  As shown in FIG. 4, the bucket device with a grapple is attached to the tip of the arm 2 and front link 3 of a construction machine or the like via a bracket 1 so that the arm 2 rotates in the vertical direction and the front link 3 is operated. As a result, the bucket 10 also rotates in the vertical direction (front-rear direction).

As shown in FIGS. 1 and 2, the bucket 10 has a plurality of excavating claws 11 a, 11 b, 11 c... On the distal end side, and the rotation shaft 26 is connected to the proximal end side of the grapple 20 on the proximal end side of the bucket 10. It is connected so that it can rotate freely.
The grapple 20 connects the distal ends of left and right arcuate grapple arms 21, 22 with a connecting plate 23 in the left-right direction, and is located on the base end side of the grapple arms 21, 22 and on the front side of the rotating shaft 26. In the position, it is connected in the left-right direction by a pipe-like connecting portion 24.
The connecting portion 24 has an operating arm 25 erected so that the distal end portion is located on the rear side of the rotating shaft 26, and the distal end portion of the operating arm 25 pivots on the piston rod 41 of the cylinder 40 with a pivot shaft 25 a. The grapple 20 is opened and closed as the piston rod 41 moves forward and backward.

As shown in FIG. 1 (a) and FIG. 2 (b), the inner stopper 12a, so that excavation is possible with the tip side connecting plate 23 of the grapple 20 entering the inside of the bucket 10 and is not pushed further inside. 12 b was provided inside the bucket 10.
On the other hand, when the piston rod 41 moves backward and the operating arm 25 pivots backward about the rotation shaft 26, the grapple 20 opens as shown in FIGS. 1 (b) and 2 (b).
Stopper mounting plates 27a and 28a are erected from the rotation shaft 26 of the grapple 20, and the rotation stoppers 27 and 28 are attached to the front end portions of the grapple 20. The bucket 10 has a position corresponding to the position of the rotation stoppers 27 and 28. The flanges 30a and 30b are erected from the base end side, and the stoppers 31a and 31b are provided on the tip end side.
As a result, the grapple 20 is stabilized because the open state of the grapple 20 is regulated in a state where the grapple 20 is in contact with the rotation stoppers 27 and 28 that rotate by the rotation of the rotation axis of the grapple and the stoppers 31a and 31b on the bucket 10 side. .
Further, the rotation stoppers 27, 28 are connected to the rotation shaft 26 side so that the impact of the rotation stoppers 27, 28 is not directly transmitted to the connecting portion 24, and the strength of the stopper mounting plates 27a, 28a is increased to the bucket 10 side. The stoppers 31a and 31b are set stronger than the stoppers 31a and 31b, and the opening / closing mechanism of the grapple 20 is prevented from being damaged.

10 Bucket 12a Inner stopper 20 Grapple 21 Grapple arm 22 Grapple arm 23 Connecting plate 24 Connecting portion 25 Actuating arm 25a Pivoting shaft 26 Turning shaft 27 Turning stopper 28 Turning stopper 30a Flange 30b Flange 31a Stopper 31b Stopper 40 Cylinder 41 Piston rod

Claims (2)

A bucket that is pivotably attached to the tip of the arm that pivots up and down of the civil engineering / construction machine, and a grapple pivotally attached to the arm side base end of the bucket,
Having an inner stopper on the inside of the bucket for regulating the range in which the open end side of the grapple rotates inside the bucket;
A bucket device with a grapple, wherein a rotation stopper for restricting a range in which the grapple rotates in the opening direction from the bucket opening is attached to a rotation shaft of the grapple. The grapple is a left and right grapple arm, a connecting plate connecting the open end sides of the left and right grapple arms, and a base end side of the left and right grapple arms, and a front portion of the rotating shaft is connected. A connecting portion in the left-right direction,
The bucket device with a grapple according to claim 1, wherein the connecting portion is connected in the front-rear direction with a piston rod of an opening / closing cylinder of the grapple.

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