JPH09221780A - Bucket device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to facilitate a repair work of a drain ditch by regulating a locus described by the cutting edge basically linearly when a pair of bucket means are moved between an open position and a closed position. SOLUTION: This bucket device 2 is provided with a support means 4 and a cylinder means 10 which is designed to move a pair of bucket means 6a and 6b, and a pair of link means 8a and 8b and a cylinder means 10 which moves the bucket means 6a and 6b. Cutting edges 70a and 70b are provided at the tip of the bucket means 6a and 6b. The bucket means 6a and 6b are mounted on the support means 4 by way of the link means 8a and 8b where the link means 8a and 8b regulate a locus described by the cutting edge 70a of the paired bucket means 6a substantially linearly when the paired bucket means 6a and 6b are forced to move between the closed positions. It is, therefore, possible to produce a basically flattened bottom surface of a drain ditch by eliminating the presence of an uneven area which may hinder a smooth flow of drain without demanding for any specific skill.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bucket device used as a working device of a construction machine such as a hydraulic excavator,
More specifically, the present invention relates to a bucket device including a pair of bucket means that are movable between a closed position in which cutting edges arranged at their tips are in contact with or close to each other and an open position in which they are separated from each other.

[0002]

2. Description of the Related Art A bucket device known as a clam-shoe bucket device is known as a type of working device applied to a construction machine such as a hydraulic excavator. Such a bucket device includes a support means, a pair of bucket means and a cylinder means. A cutting edge is provided at the tip of each of the pair of bucket means. Each of the pair of bucket means, between the closed position in which the cutting edges contact or approach each other and the open position in which the cutting edges are separated from each other, is pivotable about each predetermined pivot axis.
It is attached to the support means. The cylinder means is composed of a pair of cylinder mechanisms interposed between each of the bucket means and the support means. When the pair of cylinder mechanisms is expanded and contracted, each of the pair of bucket means is pivotally moved between the closed position and the open position about the respective pivot center axes.

Drains formed on farms or farm roads are usually formed by excavating soil. However, as time goes by, various factors cause sediment, dust, etc. to accumulate in the drains and cause water to flow. Flow is obstructed. Therefore, it is necessary to periodically excavate the drainage ditch to remove the accumulated earth and sand, dust and the like. The bucket device can be used for repair work such as drainage. When performing the drainage repair work using the bucket device,
A bucket device is attached to the hydraulic excavator, and more specifically, the support means of the bucket device is pivotably connected to the tip end of the arm of the hydraulic excavator and the tip end of the working device cylinder.
Then, the traveling direction of the hydraulic excavator main body is made parallel to the extending direction of the drainage groove so as to be positioned on one side of the drainage groove, and the boom and arm of the hydraulic excavator extend laterally with respect to the traveling direction. The bucket device connected to the tip of the arm and the tip of the working device cylinder is arranged such that the central axis of rotation of the bucket means extends substantially horizontally and in a direction substantially perpendicular to the extending direction of the drain groove. And place it in the drainage ditch. When lowering the bucket device into the drainage channel, the pair of bucket means is moved to an open position where their catching edges are spaced apart from each other. Then, after lowering the bucket device to a required position in the drainage channel, the pair of bucket means is pivotally moved from the open position to the closed position, and thus the soil, dust, etc. accumulated in the drainage channel is paired with the bucket means. The excavated material is housed in the pair of bucket means. Then, the bucket device containing the excavated earth and sand, dust, etc. is raised from the drainage channel, further moved from above the drainage channel to the required position, and the pair of bucket means is swung from the closed position to the open position for storage. Remove any dirt, dust, etc. that had been used. By moving the hydraulic excavator along the drain, the repair work as described above is performed by sequentially shifting the drain in the extension direction by the required distance, thus continuing the drain repair work in the extension direction. And carry out.

[0004]

When the drainage groove repair work as described above is performed, the bottom surface of the repaired drainage groove is paired when the pair of bucket means is swung from the open position to the closed position. The bucket means is made to have a shape that follows the trajectory drawn by the cutting edge. Thus, since the pair of bucket means are swung about the swivel center axis extending substantially horizontally and in a direction substantially perpendicular to the extending direction of the drainage groove, the locus drawn by the pair of cutting edges. Is arcuate. Therefore, the bottom surface of the repaired drainage groove is made to have a shape in which a large number of arcs are repeatedly present in the extending direction, and irregularities that hinder the smooth flow of drainage are repeatedly present in the extending direction.

The present invention has been made in view of the above facts, and its technical problem is to improve the conventional bucket device of the above-mentioned form so that a pair of bucket means are provided between the open position and the closed position. When moved, the trajectories drawn by the cutting edges of the pair of bucket means are made to be substantially linear, and the bottom surface of the drainage groove repaired by this is substantially uneven to obstruct the smooth flow of drainage. This is to make it possible to form a substantially flat shape that does not exist.

[0006]

In the present invention, in order to solve the above technical problem, a link means is interposed between each of the pair of bucket means and the support means, and the pair of bucket means are in the closed position. And the open position, the trajectory drawn by the cutting edges of the pair of bucket means is regulated by the link means in a substantially straight line.

That is, according to the present invention, as a bucket device for solving the above technical problems, a closed position in which a supporting means and a cutting edge are provided at the tip, and the catching edges contact or approach each other. And a pair of bucket means movably mounted on the support means between the cutting edge and an open position where the cutting edges are separated from each other, and a cylinder means for moving the pair of bucket means. And each of the bucket means is attached to the support means via a link means which links the bucket means when the pair of bucket means is moved between the closed position and the open position. There is provided a bucket device characterized in that a trajectory drawn by the cutting edges of a pair of bucket means is regulated in a substantially straight line.

In a preferred embodiment, each of the link means includes a first link member having one end pivotally connected to the support means and the other end pivotally connected to each of the bucket means. A second link member pivotably connected to the support means at one end and pivotally connected to each of the bucket means at the other end, and the pivoting of the first link member with respect to the support means. The central axis and the pivot center axis of the second link member with respect to the support means are displaced relative to each other, and the pivot center axis of the first link member with respect to each of the bucket means and each of the bucket means. The pivot axis of the second link member with respect to is also mutually displaced. The cylinder means is composed of a pair of cylinder mechanisms. One end of the cylinder mechanism is pivotally connected to the support means and the other end is pivotally connected to one of the bucket means. The other end of the mechanism is pivotally connected to the support means and the other end is pivotally connected to the other of the bucket means, and the pivot center axis of the cylinder mechanism with respect to each of the bucket means is the bucket means. It is aligned with the pivot axis of the first link member for each.

[0009]

In the bucket device of the present invention, the pair of bucket means is moved between the closed position and the open position by the action of the link means interposed between the pair of bucket means and the support means. Is restricted to a unique shape, and the trajectory drawn by the cutting edges of the pair of bucket means is restricted to a substantially straight line. Therefore, it is possible to perform the drainage ditch repair work and make the bottom face of the drainage ditch substantially flat without substantial irregularities that obstruct the smooth flow of drainage, without requiring special skill. .

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of a bucket device constructed according to the present invention will be described in more detail below with reference to the accompanying drawings.

Referring to FIGS. 1 and 2, a bucket device, generally designated by reference numeral 2, has a support means 4, a pair of bucket means 6a and 6b, and a pair of link means 8a and 8.
b and cylinder means 10.

Continuing the description with reference to FIGS. 3 and 4 together with FIGS. 1 and 2, the support means 4 is integrally formed by welding various steel members to each other. The supporting means 4 has a pair of hinge plates 12a and 12b extending in the vertical direction at intervals in the horizontal direction (the horizontal direction in FIG. 3). Two bosses 14a and 14b and 16a and 1 are provided on the upper end of each of the hinge plates 12a and 12b.
6b are formed. The boss portions 14a and 14b and 16a and 16b are formed with through holes 18a and 18b and 20a and 20b which extend in the lateral direction. The boss portions 14b and 16b are also formed with through holes 22 and 24 that extend diametrically across the through holes 18b and 20b. As will be further referred to later, the boss portion 14a
And 14b and 16a and 16b are used to mount the support means 4 on a construction machine such as a hydraulic excavator.

The support means 4 is provided with connecting brackets 26 and 28 at its front end (right end in FIG. 4) and its rear end (left end in FIG. 4). Each of the connecting brackets 26 and 28 having a hollow structure has a pair of leg portions extending downward from both lateral sides thereof, and the leg portions are provided with boss portions 30a and 30b and 32a and 32b. Bosses 30a and 30b and 32a and 32b
Is formed with a through hole extending in the front-rear direction (left and right direction in FIG. 4), and the bearing sleeves 34a and 3 are formed in the through hole.
4b and 36a and 36b are press-fitted. A connecting bracket 38 is arranged at the center of the supporting means 4 in the front-rear direction. The connecting bracket 38 is composed of two plates arranged at intervals in the front-rear direction, and boss portions 40a and 40b are formed at both lateral ends thereof. Through holes extending in the front-rear direction are formed in the boss portions 40a and 40b, and the bearing sleeves 42a and 42b are press-fitted into the through holes.

The support means 4 further includes a support bracket 44 located between the connecting bracket 28 and the connecting bracket 38 and a support bracket 46 located between the connecting bracket 38 and the connecting bracket 26 when viewed in the front-back direction. Is provided. Each of the support brackets 44 and 46 is composed of two plates arranged at intervals in the front-rear direction. The support bracket 44 is projected rightward in FIG. 3, and the boss 4 is formed at the protruding end.
8 are formed. On the other hand, the support bracket 46 is shown in FIG.
In the left side, and a boss portion 50 is formed at the protruding end portion. Through holes 52 and 54 extending in the front-rear direction are formed in the boss portions 48 and 50.
The bosses 48 and 50 are also formed with through holes 56 and 58 that extend diametrically across the through holes 52 and 54. Each of the support brackets 44 and 46 includes
Cylindrical members 60 and 6 arranged between the pair of plates
2 are also provided. The cross-sectional shape of the tubular members 60 and 62 is elliptical as can be clearly understood from FIG.

As will be readily understood by referring to FIG. 1, the bucket means 6a and the bucket means 6b are
(Except that the positions of the connecting brackets 78a and 78b, which will be described later, in the front-rear direction are displaced from each other).
Is a symmetrical shape with the center line extending in the up-down direction as the axis of symmetry. The bucket means 6a will be described with reference to FIGS. 5 and 6 together with FIGS. 1 and 2, and the bucket means 6a is also integrally formed by welding various steel members to each other. The bucket means 6a has a mold board 64a having a substantially semi-heart-shaped cross section. A front plate 66a is provided at the front end of the mold board 64a and a rear plate 68a is provided at the rear end of the mold board 64a.
The bucket shape in which the inner side surface (the left side surface in FIG. 5) is opened is defined by a, the front plate 66a, and the rear plate 68a. A cutting edge 70a is provided at the lower end, that is, the tip of the mold board 64a. FIG.
As will be clearly understood from the above, the cutting edge 70a extends substantially straight. As will be understood by referring to FIG. 5, the link means 8a is provided on the upper surface of the mold board 64a when the bucket means 6a is moved.
A recess 72a is formed to avoid interference with (the link means 8a will be described in detail later). A reinforcing member 74a is provided on the upper surface or the outer surface of the mold board 64a. The front plate 66a and the rear plate 68a are extended upward beyond the mold board 64a, and the horizontal plate 76a is provided between the upper ends of the inner edges of the front plate 66a and the rear plate 68a.
Are arranged.

Continuing the description with reference to FIGS. 5 and 6,
The bucket means 6a includes a connecting bracket 78a that extends upward from the reinforcing member 74a at the center in the front-rear direction. The connecting bracket 78a has three plates arranged at intervals in the front-rear direction.
A boss 80a is formed on the upper end of each plate. A through hole 82a extending in the front-rear direction is formed in the boss portion 80a, and a through hole 84a extending in the diametrical direction across the through hole 82a is also formed. An outer cover plate 86 is provided on the lateral outer surfaces of the three plates.
a is provided, and an inner cover plate 88a is provided between the center plate and the rear plate of the three plates.

The bucket means 6a is further provided with a pair of connecting brackets 90a and 92a arranged above the mold board 64a with a space in the front-rear direction. The connecting bracket 90a is composed of the upper end of the front plate 66a and an auxiliary plate 94a disposed on the upper surface of the mold board 64a, and the connecting bracket 92a is formed of the upper end of the rear plate 68a and the mold board 64a.
And an auxiliary plate 96a disposed on the upper surface of the. The boss portion 9 is provided on the connecting brackets 90a and 92a.
8a and 100a are provided. Such boss 98
a and 100a are formed with through holes 102a and 104a that extend in the front-rear direction, and also through holes 1 that extend diametrically across the through holes 102a and 104a.
06a and 108a are also formed. Bucket means 6
At the upper ends of the front plate 66a and the rear plate 68a of a, openings 107a and 109a are formed for passing pins when the bucket device 2 is assembled as described later.

As described above, the other bucket means 6b has the center line extending in the vertical direction in FIG. 1 as the axis of symmetry, except that the front and rear positions of the connecting brackets 78a and 78b are displaced from each other. Since it has a symmetrical shape with the bucket means 6a, a detailed description of the structure of the bucket means 6b will be omitted.

As can be seen from FIG. 1, the link means 8a
Is interposed between the support means 4 and the bucket means 6a, and the link means 8b is interposed between the support means 4 and the bucket means 6b. Each of the link means 8a and 8b includes a first link member 110a and 110
b and second link members 112a and 112b. Referring to FIGS. 7 and 8, the support means 4
The first link member 110a of the link means 8a interposed between the bucket means 6a and the bucket means 6a is composed of a link piece having bosses 114a and 116a formed at both ends. The boss 114a is formed with a through hole 118a extending in the front-rear direction, and the through hole 118a is also formed.
A through hole 120a is formed so as to extend in the diametrical direction across the hole. A through hole extending in the front-rear direction (left and right direction in FIG. 8) is formed in the boss portion 116a, and the bearing sleeve 122a is press-fitted into the through hole.

Continuing the description with reference to FIGS. 1 and 2 together with FIGS. 7 and 8, one end of the first link member 110a is pivotally connected to the support means 4. More specifically, as will be understood by referring to FIGS. 1 and 2, the boss portion 114a of the first link member 110a is aligned with the boss portion 40a of the supporting means 4, and the boss portion 114a.
a through hole 114a and bearing sleeve 4 of boss portion 40a
The connecting pin 124a is inserted into 2a. Connecting pin 124
A through hole (not shown) extending in the diametrical direction is formed in a. A shaft portion of a bolt (not shown) is inserted into a through hole 118a formed in the boss 114a together with the through hole of the connecting pin 124a, and the through hole 11
A nut (not shown) is screwed onto the projecting end of the shaft of the bolt projecting through 8a, thereby fixing the connecting bin 124a to the boss 114a. Thus, one end of the first link member 110a is rotatably connected to the support means 4 with the central axis of the connecting pin 124a as the central axis of rotation. The other end of the first link member 110a is pivotally connected to the bucket means 6a. More specifically, the boss portion 116a of the first link member 110a is aligned with the boss portion 80a of the bucket means 6a, and the connecting pin 126a is inserted into the bearing sleeve 122a of the boss portion 116a and the through hole 82a of the boss portion 80a. It A through hole (not shown) extending in the diametrical direction is formed in the connecting pin 126a. A shaft portion of a bolt (not shown) is inserted into a through hole 84a formed in the boss portion 80a together with the through hole of the connecting pin 126a, and a protruding end of the shaft portion of the bolt protruding through the through hole 84a. A nut (not shown) is screwed onto the portion, thereby fixing the connecting pin 126a to the boss portion 84a. Thus, the other end of the first connecting link member 110a has the bucket means 6a.
Is rotatably connected with the central axis of the connecting pin 126a as the central axis of rotation. Support means 4 and bucket means 6b
Since the structure of the first link member 110b of the link means 8b interposed between and is substantially the same as that of the above-mentioned first link member 110a, the description thereof will be omitted.

Continuing the description with reference to FIGS. 9 and 10, the second link member 112a of the link means 8a interposed between the support means 4 and the bucket means 8a.
Includes a tube member 130a extending in the front-rear direction (left-right direction in FIG. 10). A pair of link pieces 132a and 134a are fixed to the front end portion of the pipe member 130a at intervals in the front-rear direction, and a pair of link pieces 136a and 134a are also formed at the rear end portion of the pipe member 130b at intervals in the front-rear direction. 138a is fixed. Link pieces 132a and 13
A boss 140a is formed at one end of 4a, and a boss 142a is formed at one end of the link pieces 136a and 138a. In addition, a boss portion 144a is formed at the other end of each of the link pieces 132a and 134a.
A boss portion 146a is formed at the other end of each of a and 138a. Through holes 148a and 150a extending in the front-rear direction are formed in the boss portions 140a and 142a, and through holes 152a and 154a that extend diametrically across the through holes 148a and 150a are also formed. Through holes extending in the front-rear direction are formed in the boss portions 144a and 146a, and the bearing sleeve 1 is formed in the through holes.
58a and 160a are press-fitted.

Continuing the description with reference to FIGS. 1 and 2 together with FIGS. 9 and 10, one end of the second link member 112a, that is, the link pieces 132a, 134a, 136a and 1 is formed.
One end of 38a is pivotally connected to the support means 4.
More specifically, as will be understood by referring to FIGS. 1 and 2, the boss portion 1 of the second link member 112a.
40a and 142a are boss portions 30a and 3 of the supporting means 4.
2a and the through holes 1 of the boss 140a, which are aligned with each other.
The connecting pin 162a is inserted into the bearing sleeve 34a of the boss portion 30a and 48a (insertion of the connecting pin 162a can be performed through the opening 107a formed in the upper end portion of the front plate 66a of the bucket means 6a). The connecting pin 164a is inserted into the through hole 150a of the 142a and the bearing sleeve 36a of the boss portion 32a (the connecting pin 164a is inserted by the rear plate 6 of the bucket means 6a).
8a) can be performed through an opening 109a formed at the upper end of 8a). Connecting pins 162a and 164a
A through hole (not shown) extending in the diametrical direction is formed in the. The boss 1 together with the through hole of the connecting pin 162a.
A shaft portion of a bolt (not shown) is inserted into a through hole 152a formed in 40a, and a nut (not shown) is attached to a protruding end portion of the shaft portion of the bolt which projects through the through hole 152a. It is screwed, and thereby the connecting bottle 162a is attached.
Is fixed to the boss portion 140a. Similarly, the connecting pin 164
A shaft portion of a bolt (not shown) is inserted into a through hole 154a formed in the boss portion 142a together with the through hole of a, and a nut is attached to a protruding end portion of the shaft portion of the bolt which protrudes through the through hole 154a. A screw (not shown) is screwed on to fix the connecting bin 164a to the boss 142a. Thus, one end of the second link member 112a, namely the link pieces 132a, 134a, 136a and 138a.
One end of each of the connecting pins 162a and 164 is connected to the supporting means 4.
It is rotatably connected with the central axis of a as the central axis of rotation. The pivot axis of the second link member 112a with respect to the support means 4 (i.e., the center axes of the connecting pins 162a and 164a aligned with each other) is the pivot axis of the first link member 110a with respect to the support means 4 (i.e. It is displaced downward with respect to the central axis of the connecting pin 124a and also slightly inward in the lateral direction. The other end of the second link member 112a, that is, the link pieces 132a, 13
The other end of 4a, 136a, and 138a is the bucket means 6
It is pivotally connected to a. More specifically, the bosses 144a and 146a of the second link member 112a are aligned with the bosses 98a and 100a of the bucket means 6a, respectively, and are connected to the bearing sleeve 158a of the boss 144a and the through hole 102a of the boss 98a. The pin 166a is inserted, and the connecting pin 168a is inserted into the bearing sleeve 160a of the boss portion 146a and the through hole 104a of the boss portion 100a. Through holes (not shown) extending in the diametrical direction are formed in the connecting pins 166a and 168a.
A shaft portion of a bolt (not shown) is inserted into the through hole 106a formed in the boss portion 98a together with the through hole of the connecting pin 166a, and the protruding end portion of the shaft portion of the bolt protruding through the through hole 106a. A nut (not shown) is screwed on the connection bin 166a to attach the connection bin 166a to the boss 98a.
Fixed to Similarly, a shaft portion of a bolt (not shown) is inserted into the through hole 108a formed in the boss portion 100a together with the through hole of the connecting pin 168a, and the through hole 10
A nut (not shown) is screwed onto the protruding end of the shaft of the bolt protruding through 8a, thereby fixing the connecting pin 168a to the boss 100a. Thus, the other end of the second link member 112a, that is, the link piece 132
The other ends of a, 134a, 136a and 138a are pivotally connected to the bucket means 6a with the central axes of the connecting pins 166a and 168a as the central pivot axes. The pivot axis of the second link member 112a relative to the bucket means 6a (i.e. the connecting pins 16 aligned with each other).
The central axes of 6a and 168a are displaced downward with respect to the central axis of rotation of the first link member 110a with respect to the bucket means 6a (that is, the central axis of the connecting pin 126a) and also laterally inward. Since the structure of the second link member 112b of the link means 8b interposed between the supporting means 4 and the bucket means 6b is substantially the same as that of the above-mentioned first link member 112a,
A description of this will be omitted.

Referring to FIGS. 1 and 2, the cylinder means 10 comprises a pair of cylinder mechanisms 170a and 170a.
b. The cylinder mechanism 170a is a cylinder 17
It is composed of a hydraulic cylinder having 2a and a rod 174a, a connecting bearing sleeve (not shown) is arranged at the cylinder end, and a connecting bearing sleeve (not shown) is also provided at the rod end. ) Is provided. One end of the cylinder mechanism 170a is pivotally connected to the support means 4. More specifically, the bearing sleeve disposed at the end of the cylinder is aligned with the boss portion 50 of the supporting means 4, and the connecting pin 176a is inserted into the through hole 54 of the bearing sleeve and the boss portion 50. Connecting pin 17
A through hole (not shown) extending in the diametrical direction is formed in 6a. A shaft portion of a bolt (not shown) is inserted into a through hole 58 (FIGS. 3 and 4) formed in the boss portion 50 together with the through hole of the connecting pin 176a,
A nut (not shown) is screwed onto the protruding end of the shaft of the bolt protruding through the through hole 58, thereby fixing the connecting bin 176a to the boss 50. Thus, one end of the cylinder mechanism 170a is rotatably connected to the support means 4 with the central axis of the connecting pin 176a as the central axis of rotation. The other end of the cylinder mechanism 170a is pivotally connected to the bucket means 6a. More specifically, the bearing sleeve arranged at the end of the rod is aligned with the boss portion 80a of the bucket means 6a. As clearly shown in FIG. 6, the boss portion 80a is formed on the connecting bracket 78a composed of three plates, and the boss portion of the first link member 110a is provided between the rear plate and the central plate. 116a is positioned and the bearing sleeve of the cylinder mechanism 170a is positioned between the center plate and the front plate. And the boss 8
The connecting pin 126a, which is inserted into the through hole 82a of 0a and the bearing sleeve 122a of the boss portion 116a and fixed to the boss portion 80a, is also inserted into the bearing sleeve of the cylinder mechanism 170a. Thus, the cylinder mechanism 170
The other end of a is pivotally connected to the bucket means 6a with the central axis of the connecting pin 126a as the central axis of rotation.
The first link member 110 for the bucket means 6a.
The turning center axis of a is also the center axis of the connecting pin 126a, and the turning center axis of the cylinder mechanism 170a with respect to the bucket means 6a and the turning center axis of the first link member 110a with respect to the bucket means 6a are aligned.
The structure of the cylinder mechanism 170b is substantially the same as that of the cylinder mechanism 170a. One end of the cylinder mechanism 170b is rotatably connected to the boss 50a of the support means 4 with the central axis of the connecting pin 176b as the central axis of rotation, and the other end of the cylinder mechanism 170b is boss 80 of the bucket means 6b.
The connecting pin 126b is attached to the shaft b so as to be rotatable about the central axis of the pivot.

Referring to FIG. 11 together with FIG. 1, the operation of the bucket device 2 as described above will be described. When the pair of cylinder mechanisms 170a and 170b of the cylinder means 10 are in the extended state, the bucket means 6a and 6b is located in the closed position shown by the solid line in FIGS.
In such a closed position, the cutting edge 70a of the bucket means 6a and the cutting edge 70b of the bucket means 6b are in contact with or close to each other. When the pair of cylinder mechanisms 170a and of the cylinder means 10 are gradually contracted, the first link members 110a and 110a.
b is the connecting pins 124a and 124b from the position indicated by the solid line to the position indicated by the two-dot chain line Y through the position indicated by the two-dot chain line X.
Of the connecting pins 164a and 164b from the position indicated by the solid line to the position indicated by the two-dot chain line Y from the position indicated by the solid line to the position indicated by the two-dot chain line Y. It can be swung with the axis as the turning center axis. And bucket means 6
The a and 6b are moved from the closed position shown by the solid line to the open position shown by the two-dot chain line Y through the position shown by the two-dot chain line X. When the buckets 6a and 6b are brought to the open position indicated by the chain double-dashed line Y, the cutting edge 70a of the bucket means 6a and the cutting edge 70b of the bucket means 6b are separated from each other. As will be easily understood by referring to FIG. 11, expansion and contraction of the pair of cylinder mechanisms 170a and 170b of the cylinder means 10 causes the bucket means 6a and 6b to move between a closed position shown by a solid line and an open position shown by a chain double-dashed line Y. When it is possible to move between, the link means 8
The bucket means 6a and 6b draw a unique locus by the regulation by the first link members 110a and 110b of a and 8b and the second link members 112a and 112b, and the loci drawn by the cutting edges 70a and 70b are substantially straight. is there.

FIG. 12 schematically shows a state in which the bucket device 2 is mounted on a hydraulic excavator and a drainage groove is repaired. The hydraulic excavator 178 is positioned on one side of the drain groove 180 with its running direction substantially parallel to the extending direction of the drain groove 180 (the direction perpendicular to the paper surface in FIG. 12). The bucket device 2 is pivotally connected to the tip of an arm 182 of the hydraulic excavator 178 and the tip of a connecting member 186 connected to the working device cylinder 184. Referring to FIGS. 3 and 4 together with FIG. 12, a bearing sleeve (not shown) is arranged at the tip of the arm 182, and the bearing sleeve is used as a boss in the support means 4 of the bucket device 2. Part 14
Positioned between a and 14b, bosses 14a and 14b
The connecting pin 188 is inserted into the through holes 18a and 18b and the bearing sleeve. A through hole (not shown) extending in the diametrical direction is formed in the connecting pin 188, and a bolt (not shown) is formed in the through hole 22 formed in the boss portion 14b together with the through hole of the connecting pin 188. The shaft of the bolt is inserted, and a nut (not shown) is screwed onto the protruding end of the shaft of the bolt protruding through the through hole 22.
This fixes the connecting bottle 188 to the boss portion 14b. Thus, the tip of the arm 182 is pivotally connected to the bosses 14a and 14b of the support means 4. Similarly, a bearing sleeve (not shown) is also provided at the tip of the connecting member 186, and the bearing sleeve is used as the boss portions 16 a and 1 a of the support means 4 of the bucket device 2.
6b, and connecting pins 190 to the through holes 29a and 20b of the boss portions 16a and 16b and the bearing sleeve.
Insert A through hole (not shown) extending in the diametrical direction is formed in the connecting pin 190.
The shaft portion of the bolt (not shown) is inserted into the through hole 24 (FIG. 3) formed in the boss portion 16b together with the through hole of 0, and the shaft portion of the bolt protruding through the through hole 24 is projected. Screw a nut (not shown) on the protruding end,
This fixes the connecting bottle 190 to the boss portion 16b. Thus, the tip end of the connecting member 186 is rotatably connected to the boss portions 16a and 16b of the supporting means 4. The other end of the connecting member 186 is rotatably connected to the rod end of the working device cylinder 184.

The bucket device 2 mounted on the hydraulic excavator 178 is lowered into the drain groove 180 with its front-back direction aligned with the width direction of the drain groove 180. When descending into the drain 180, the bucket means 6a and 6b are in the open position. Then, when the bucket device 2 is lowered to a required position in the drain groove 180, the bucket means 6a and 6b are moved from the open position to the closed position, thus excavating the earth and sand, the dust and the like in the drain groove 180, and making a bucket. It is housed within the means 6a and 6b. After that, the bucket device 2 is raised from the drainage groove 180 and then moved to a required portion to be bucket means 6a.
And 6b are discharged to a required site. The hydraulic excavator 178 is appropriately moved along the drain groove 180 and the above-described repair work is repeatedly performed. Thus, in the bucket device 2 constructed according to the present invention, when the bucket means 6a and 6b are moved from the open position to the closed position or from the closed position to the open position, the cutting edges 70a and 70b are substantially straight. Therefore, it is moved in a substantially position plane. Therefore, it is possible to make the bottom surface of the drain groove 180 a substantially flat surface having no unevenness that obstructs the smooth flow of drainage by performing the repair work as described above without requiring special skill. it can.

[0027]

In the bucket device of the present invention, when the pair of bucket means are moved between the open position and the closed position, the trajectory drawn by the cutting edges is substantially straight, and therefore the drain groove is formed. When applied to the repair work described above, it is possible to make the bottom surface of the drain groove a substantially flat surface without any unevenness that hinders the smooth flow of drainage, without requiring special skill.

[Brief description of drawings]

1 is a front view of a preferred embodiment of a bucket device constructed in accordance with the present invention. FIG.

FIG. 2 is a side view of the bucket device shown in FIG.

FIG. 3 is a front view of a supporting means in the bucket device shown in FIG.

FIG. 4 is a side view of the supporting means shown in FIG.

5 is a front view of bucket means in the bucket device shown in FIG. 1. FIG.

FIG. 6 is a side view of the bucket means shown in FIG.

7 is a front view of the first link member of the bucket device shown in FIG. 1. FIG.

FIG. 8 is a side view of the first link member shown in FIG.

9 is a front view of the second link member of the bucket device shown in FIG. 1. FIG.

10 is a side view of the second link member shown in FIG.

FIG. 11 is a simplified diagram showing the manner of movement of bucket means in the bucket device shown in FIG.

FIG. 12 is a simplified diagram showing how the bucket device shown in FIG. 1 is mounted on a hydraulic excavator to perform drainage groove repair work.

[Explanation of symbols]

 2: Bucket device 4: Support means 6a: Bucket means 6b: Bucket means 8a: Link means 8b: Link means 10: Cylinder mechanism 70a: Cutting edge 70b: Cutting edge 110a: First link member 110b: First Link member 112a: Second link member 112b: Second link member 170a: Cylinder mechanism 170b: Cylinder mechanism 178: Hydraulic excavator 180: Drain groove

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Kazumasa Sato Inventor Kazumasa Sato 2-5-6 Satozuka, Toyohira-ku, Sapporo, Hokkaido In-house (72) Inventor, Kunihiko Nakajima 168 Kadoyama, Ebetsu, Hokkaido

Claims (3)

[Claims] 1. A support means and a moving position between a closed position in which a cutting edge is disposed at a tip, and the catching edges are in contact with or close to each other, and an open position in which the cutting edge is separated from each other. A bucket device comprising a pair of bucket means freely attached to the support means and a cylinder means for moving the pair of bucket means, each of the bucket means being provided with the support means via a link means. Is attached to the link means, and when the pair of bucket means is moved between the closed position and the open position, the link means linearly draws a locus drawn by the cutting edges of the pair of bucket means. A bucket device characterized by being regulated. 2. A first link member, one end of which is pivotally connected to the support means and the other end of which is pivotally connected to each of the bucket means, and one end of each of the link means. A second link member pivotably connected to the support means and having the other end pivotally connected to each of the bucket means, and a pivot center axis of the first link member with respect to the support means; The pivot axis of the second link member with respect to the support means is displaced relative to each other, and the pivot axis of the first link member with respect to each of the bucket means and the second pivot axis with respect to each of the bucket means. 2. The bucket device according to claim 1, wherein the center axis of the swing of the link member is also mutually displaced. 3. The cylinder means comprises a pair of cylinder mechanisms, one end of the cylinder mechanism is pivotally connected to the support means and the other end is pivotally connected to one of the bucket means. The other end of the cylinder mechanism is pivotally connected to the support means and the other end is pivotally connected to the other of the bucket means, and the pivot center axis of the cylinder mechanism with respect to each of the bucket means. 3. The bucket device according to claim 2, wherein is aligned with a central axis of rotation of the first link member with respect to each of the bucket means.