JP7085738B2 - Bucket for construction machinery - Google Patents

Description

The present invention relates to a construction machinery bucket connected to a construction machinery boom.

Patent Document 1 discloses a wheel loader including a boom that displaces the tip in the vertical direction. A side dump bucket is connected to the tip of the boom. The side dump bucket is provided with a mounting plate that holds the load when lifting the load. When the side dump bucket is positioned with respect to the dump truck bed or the conveyor belt crusher, one end of the mounting plate in the left-right direction is lifted around the hinge pin. When the mounting plate tilts to the left and right of the construction machine, the load slides off the mounting plate. In this way, the wheel loader can load the load on the dump truck carrier or the conveyor belt crusher while standing still in parallel with the dump truck or the conveyor belt crusher as much as possible.

Japanese Patent No. 3953654

These side dump wheel loaders are often used for tunnel and underground work. However, due to the presence of ceilings in tunnels and mine, interference between one end of the lifted side dump bucket and the ceiling must be avoided. As a result, the work area of the wheel loader is limited in the tunnel or mine. Generally, in tunnels and mine shafts, the height of the ceiling decreases as the distance from the center of the passage increases to the left and right. Is easy to interfere with.

An object of the present invention is to provide a bucket for construction machinery that can contribute to the realization of more efficient work in a tunnel or a mine.

According to the present invention, a mounting plate which is connected to a boom of a construction machine and has a mounting surface for holding the load when lifting the load, and a mounting plate connected to the mounting plate and having a slider parallel to the above-mentioned mounting surface. A guide body having a guide path for guiding the displacement is coupled to the slider and driven from one end of the previously described mounting surface toward the other end to push down the load on the previously described mounting surface from the other end. Construction equipment buckets with push plates are provided.

When using the construction equipment bucket The construction equipment bucket is connected to the construction equipment boom. The load is placed on the mounting surface of the mounting plate according to the operation of the construction machine. In response to the rise of the boom, the construction equipment bucket is positioned with respect to, for example, a dump truck bed or a belt conveyor crusher. When the push plate is driven from one end of the mounting surface toward the other end, the push plate can push down the load from the other end of the mounting surface. At this time, since the mounting plate is maintained in a horizontal posture without tilting, an increase in height can be avoided as compared with the side dump specification. Interference between the construction equipment bucket and the ceiling can be avoided in the expanded work area in tunnels and mine. The work area of construction machinery can be expanded. More efficient work can be achieved in tunnels and mine.

The construction machine bucket extends in the first direction from the slider and is wound around the first axis located inside one end of the mounting plate when the push plate is positioned on one end of the above-mentioned mounting surface. When the push plate is positioned on the other end of the above-mentioned mounting surface, which extends from the sling material and the slider in the second direction opposite to the first direction and is parallel to the first axis, the mounting plate is used. The second sling material wound around the second axis located inside the other end and the first sling material are subjected to a first pulling force for driving the slider in the first direction, and the second sling is applied. The material may further be provided with a power source that exerts a second tensile force that drives the slider in the second direction.

Since the first sling material is wound around the first axis, the first sling material and the power source are used to apply the first tensile force when the push plate is positioned to the maximum toward one end of the mounting surface. It can be placed inside one end of the mounting plate. Similarly, since the second sling material is wound around the second axis, the second sling material is applied to the second tensile force when the push plate is positioned to the maximum toward the other end of the mounting surface. And the power source can be located inside the other end of the mounting plate. Although the push plate is displaced to the maximum from one end to the other end of the mounting plate, it is possible to prevent the drive mechanism and the transmission mechanism from protruding from the mounting plate when the push plate is driven. It is possible to avoid increasing the size of the bucket for construction machinery. Such construction equipment buckets can contribute to the realization of efficient work in tunnels and mine. Chains, wire ropes, belts and the like can be used for the first sling material and the second sling material.

The power source connects a cylinder rod to a displacement member that supports a first roller that guides the sliding of the first sling material around the axis and a second roller that guides the sliding of the second sling material around the axis. Then, the cylinder rod is placed parallel to the guide path between the first position where the first roller is positioned coaxially with the first axis and the second position where the second roller is positioned coaxially with the second axis. Any hydraulic cylinder that can be moved will do. The push plate can be displaced from one end to the other end of the mounting surface according to a simple expansion / contraction operation of the hydraulic cylinder (cylinder rod insertion / removal). At this time, the hydraulic cylinder can be accommodated within the range of one end and the other end of the mounting plate. It is possible to avoid increasing the size of the bucket for construction machinery. Since a hydraulic cylinder is used to drive the push plate, the bucket for construction machinery can be attached to existing construction machinery with side dump specifications.

The slider may include two rollers arranged at arbitrary intervals in the direction of the displacement and guided by the guide path. At this time, the guide path extends from one end of the linear region toward one end of the linear region extending parallel to the direction of the displacement and one end of the linear region, and moves away from the above-mentioned mounting surface as the distance from one end of the linear region increases. It may have a first inclined region and a second inclined region extending from the other end of the linear region toward the other end of the mounting plate and moving away from the above-mentioned mounting surface as the distance from the other end of the linear region increases. When the slider is displaced along the linear region, the push plate can be displaced parallel to the mounting surface. In this way, the push plate can move the load on the mounting surface from one end toward the other end. When at least one of the rollers enters the first inclined region, the push plate can change its posture outward from one end of the mounting plate. In this way, the push plate can be positioned as far as possible to the outside even though the position of the slider is restricted to the inside of one end of the mounting plate. Here, both rollers may enter the first slope zone. When at least one roller enters the second inclined region, the push plate can change its posture outward from the other end of the mounting plate. In this way, the push plate can be positioned as far as possible to the outside even though the position of the slider is restricted to the inside of the other end of the mounting plate. Here, both rollers may enter the second slope zone.

According to the construction equipment bucket disclosed as described above, it is possible to provide a construction equipment bucket that can contribute to the realization of more efficient work in a tunnel or a mine.

It is a side view which shows schematic structure of the construction machine which concerns on one Embodiment of this invention. It is a conceptual diagram which shows the structure of the hydraulic system of a construction machine. It is an enlarged side view of the boom. It is a perspective view of a bucket. It is a conceptual diagram which shows the operation of a push plate drive mechanism. It is a front perspective view which shows the operation of a bucket. It is a perspective view which shows the construction machine of the side dump specification roughly.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings. Here, the top, bottom, front, back, left, and right of the vehicle body shall be defined based on the eyes of the operator who got on the construction machine.

FIG. 1 schematically shows the structure of a construction machine 11 according to an embodiment of the present invention. The construction machine 11 includes a vehicle body 14 that is freely supported on the ground by the left and right front wheels 12 and the left and right rear wheels 13. The left and right front wheels 12 rotate around a common rotation axis 15. The left and right rear wheels 13 rotate around a common rotation axis 16. The rotation axis 15 of the front wheel 12 is arranged in one horizontal plane parallel to the ground, including the rotation axis 16 of the rear wheel 13, for example. The vehicle body 14 can turn by displacing the rotation axis 15 of the front wheels 12 around the axis orthogonal to the horizontal plane. A cabin 17 is mounted on the vehicle body 14 between the front wheels 12 and the rear wheels 13. The operator can sit in the cabin 17 and operate the construction machine 11. The construction machine 11 is configured as a so-called wheel loader.

A boom 19 is installed on the vehicle body 14 between the left and right front wheels 12 so as to be undulating around 18 horizontal axes (hereinafter referred to as "undulating axes"). Boom 19 comprises a left arm and a right arm. The first drive mechanism 21 is connected to the boom 19. The first drive mechanism 21 includes left and right hydraulic cylinders (hereinafter referred to as “undulating hydraulic cylinders”) 22 which are connected to the vehicle body 14 at one end and connected to the left arm and the right arm of the boom 19 at the other end, respectively. The undulating hydraulic cylinder 22 has a cylinder body 23 extending from one end toward the other end and accommodating a piston, and a cylinder rod 24 extending from the other end toward one end and connected to the piston. The cylinder body 23 is rotatably connected to the vehicle body 14 at one end of the undulating hydraulic cylinder 22 around a first connecting shaft 25 arranged in parallel with the undulating axis 18 below the undulating axis 18. The cylinder rod 24 is rotatably connected to the boom 19 at the other end of the undulating hydraulic cylinder 22 around a second connecting shaft 26 arranged parallel to the undulating axis 18.

As shown in FIG. 2, the internal space of the cylinder body 23 is partitioned by a piston 28 into a first hydraulic chamber 27a on one end side and a second hydraulic chamber 27b on the other end side. Hydraulic oil is supplied to the first hydraulic chamber 27a and the second hydraulic chamber 27b from a hydraulic source (for example, a hydraulic pump) 29. When hydraulic pressure acts on the first hydraulic chamber 27a, the piston 28 is driven toward the other end. The cylinder rod 24 is pushed out from the cylinder body 23. The undulating hydraulic cylinder 22 extends. Boom 19 rises. When hydraulic pressure acts on the second hydraulic chamber 27b, the piston 28 is driven toward one end. The cylinder rod 24 is pushed into the cylinder body 23. The undulating hydraulic cylinder 22 contracts. Boom 19 descends.

As shown in FIG. 3, the bucket 32 is freely swingably connected to the tip of the boom 19 around the third connecting shaft 31. The third connecting shaft 31 is arranged parallel to the undulating axis 18. A second drive mechanism 33 is connected to the bucket 32. The second drive mechanism 33 is connected to the first link member 35, which is swingably connected to the boom 19 around the swing shaft 34 at an intermediate position, and the first link member 35 and the boom 19, with respect to the boom 19. The hydraulic cylinder (hereinafter referred to as "swing hydraulic cylinder") 36 that causes the first link member 35 to swing relatively, and the first link member 35 are connected to the first link member 35 and the bucket 32 to swing the first link member 35. Is provided with a second link member 37 that converts the hydraulic pressure into the swinging motion of the bucket 32.

The first link member 35 is arranged between the left arm and the right arm of the boom 19. The swing shaft 34 is arranged parallel to the undulating axis 18. The swing shaft 34 is supported by the boom 19 at an intermediate position located between the front end and the rear end of the boom 19. The first link member 35 has a first body 35a extending in the first direction from the swing shaft 34 along a virtual plane orthogonal to the swing shaft 34 and a swing shaft along the virtual plane orthogonal to the swing shaft 34. It has a second body 35b extending from 34 in the second direction opposite to the first direction.

The swing hydraulic cylinder 36 has a cylinder body 39 extending from one end toward the other end and accommodating the piston 38, and a cylinder rod 41 extending from the other end toward one end and connected to the piston 38. The cylinder body 39 is rotatably connected to the boom 19 at one end of the swing hydraulic cylinder 36 around a fourth connecting shaft 42 arranged behind the swing shaft 34 and parallel to the swing shaft 34. The cylinder rod 41 is the other end of the swing hydraulic cylinder 36 and is rotatably connected to the first body 35a of the first link member 35 around the fifth connecting shaft 43 arranged in parallel with the swing shaft 34.

As shown in FIG. 2, the internal space of the cylinder body 39 is partitioned by a piston 38 into a third hydraulic chamber 44a on one end side and a fourth hydraulic chamber 44b on the other end side. Hydraulic oil is supplied to the third hydraulic chamber 44a and the fourth hydraulic chamber 44b from a hydraulic source (for example, a hydraulic pump) 29. When hydraulic pressure acts on the third hydraulic chamber 44a, the piston 38 is driven toward the other end. The cylinder rod 41 is pushed out from the cylinder body 39. The swing hydraulic cylinder 36 extends. When hydraulic pressure acts on the fourth hydraulic chamber 44b, the piston 38 is driven toward one end. The cylinder rod 41 is pushed into the cylinder body 39. The swing hydraulic cylinder 36 contracts.

The second link member 37 is rotatably connected to the second body 35b of the first link member 35 around the sixth connecting shaft 45 at one end, and rotatably connected to the bucket 32 around the seventh connecting shaft 46 at the other end. Will be done. The seventh connecting shaft 46 is arranged above the third connecting shaft 31. Both the sixth connecting shaft 45 and the seventh connecting shaft 46 are arranged in parallel with the swing shaft 34. When the swing hydraulic cylinder 36 is extended, the bucket 32 realizes a swing operation upward around the third connecting shaft 31. When the swing hydraulic cylinder 36 contracts, the bucket 32 realizes a downward swing motion around the third connecting shaft 31.

The bucket 32 has a mounting plate 47 having a mounting surface 47a for holding the load when lifting the load, and a guide path 49 connected to the mounting plate 47 and guiding the displacement of the slider 48 in parallel with the mounting surface 47a. It includes a guide body 51, and a push plate 52 that is coupled to a slider 48 and is driven from one end to the other end of the mounting surface 47a to push down a load on the mounting surface 47a from the other end. The mounting plate 47 has a scooping area 53a extending parallel to the axis of the third connecting shaft 31 and spreading flat from the front end opened forward, and a scooping area 53a continuous from the rear end of the scooping area 53a to the axis of the third connecting shaft 31. It has a curved region 53b that has parallel bus lines and extends while curving upward. The left and right ends of the mounting plate 47 are opened. Here, the mounting surface 47a corresponds to the surface of the scooping area 53a. The displacement of the slider 48 is set parallel to the third connecting shaft 31. That is, one end of the mounting surface 47a corresponds to the right end, and the other end of the mounting surface 47a corresponds to the left end. As shown in FIG. 4, the mounting plate 47 includes a pair of left and right first bearings 54 for supporting the third connecting shaft 31 used for connecting the left arm and the right arm of the boom 19, and a second drive mechanism 33. A second bearing 55 that supports the seventh connecting shaft 46 used for connecting to the second link member 37 is formed.

The slider 48 includes two rollers 56 that are arranged at arbitrary intervals in the direction of displacement and guided by the guide path 49. As shown in FIG. 3, each roller 56 has a support shaft 57 fixed to the slider 48 and a rotor 58 rotatably coupled to the support shaft 57 by a rolling bearing. An annular groove 58a is formed on the outer periphery of the rotor 58 coaxially with the rotation axis. The edge of the guide body 51 that divides the guide path 49 enters the annular groove 58a. By the action of the annular groove 58a, it is possible to prevent the rotor 58 from coming off from the guide path 49 in the axial direction of the rotation axis of the rotor 58.

As shown in FIG. 5, the guide path 49 extends from the right end of the linear region 49a toward the right end of the mounting plate 47 and the linear region 49a extending in parallel with the displacement direction of the slider 48, and from the right end of the linear region 49a. The first inclined region 49b that moves away from the mounting surface 47a as the distance increases, and the second inclined region 49c that extends from the left end of the linear region 49a toward the left end of the mounting plate 47 and moves away from the mounting surface 47a as the distance from the left end of the linear region 49a increases. And have. The first inclined area 49b and the second inclined area 49c may extend linearly. Here, a circular opening 59 is connected to the end of the first inclined region 49b. The circular opening 59 is formed in a size that allows the rotor 58 to be taken in and out in the axial direction of the support shaft 57. Rollers 56 can be inserted into the guide path 49 one by one from the circular opening 59. The slider 48 can be coupled to the two rollers 56 guided by the guide path 49. When the slider 48 is connected, the roller 56 can be prevented from coming off from the circular opening 59.

A push plate drive mechanism 61 is connected to the slider 48. The push plate drive mechanism 61 extends parallel to the linear region 49a of the guide path 49 and moves a displacement member 64 that supports the first roller 62 and the second roller 63 and a cylinder rod 65 that is connected to the displacement member 64. It includes a cylinder (hereinafter referred to as “bucket hydraulic cylinder”) 66 and a connecting member 67 that is guided in parallel to the linear region 49a of the guide path 49 and is displaced in conjunction with the movement of the displacement member 64. The first roller 62 has a rotation axis in a virtual plane orthogonal to the axis of the third connecting shaft 31. The second roller 63 has a rotation axis parallel to the rotation axis of the first roller 62 at intervals parallel to the third connecting shaft 31 from the first roller 62. An annular grooves 62a and 63a are formed on the outer circumferences of the first roller 62 and the second roller 63 coaxially with the rotation axis. The displacement of the displacement member 64 is linearly regulated parallel to the third connecting shaft 31. The displacement member 64 can be guided by a guide (not shown) in order to regulate such displacement.

The bucket hydraulic cylinder (power source) 66 extends from the right end to the left end of the guide body 51, and accommodates the piston 68, and the cylinder rod 65 that penetrates from the left end of the cylinder body 69 and is connected to the piston 68. And have. The central axis of the cylinder body 69 is arranged parallel to the axis of the third connecting shaft 31. The cylinder rod 65 is displaced parallel to the third connecting shaft 31. The internal space of the cylinder body 69 is partitioned by a piston 68 into a first hydraulic chamber 71a on the right side and a second hydraulic chamber 71b on the left side. A hydraulic pipe 72 for supplying hydraulic oil from a hydraulic source (for example, a hydraulic pump) 29 mounted on the vehicle body 14, for example, is connected to the first hydraulic chamber 71a and the second hydraulic chamber 71b. When hydraulic pressure acts on the first hydraulic chamber 71a, the piston 68 is driven toward the left end. The cylinder rod 65 is extruded from the cylinder body 69. The bucket hydraulic cylinder 66 extends. The displacement member 64 can move to the left limit position. When hydraulic pressure acts on the second hydraulic chamber 71b, the piston 68 is driven toward the right end. The cylinder rod 65 is pushed into the cylinder body 69. The bucket hydraulic cylinder 66 contracts. The displacement member 64 can move to the right limit position.

The connecting member 67 is linearly displaced between the first roller 62 and the second roller 63. The displacement of the connecting member 67 may be guided by the displacement member 64 or may be guided by the guide body 51. The connecting member 67 is connected to the slider 48. The linear movement of the connecting member 67 is transmitted to the slider 48 in parallel with the linear region 49a of the guide path 49. In transmitting the linear movement, the swinging motion of the connecting member 67 is allowed around the axis with respect to the slider 48. As a result, while the connecting member 67 carries out a simple linear motion, the posture change of the push plate 52 based on the first inclined region 49b and the second inclined region 49c of the guide path 49 can be allowed.

The connecting member 67 is connected to the displacement member 64 by the first sling material 73 wound around the first roller 62 and the second sling material 74 wound around the second roller 63. Here, a steel chain is used for the first sling material 73 and the second sling material 74. In addition, a wire rope or a belt can be used for the first sling material 73 and the second sling material 74. The first sling member 73 extends from the connecting member 67 coupled to the slider 48 to the first direction DR1, is wound around the first roller 62, and is coupled to the left end of the guide body 51. The second sling member 74 extends from the connecting member 67 to the second direction DR2 opposite to the first direction DR1, is wound around the second roller 63, and is coupled to the right end of the guide body 51. As shown in FIG. 5A, when the bucket hydraulic cylinder 66 is maximally contracted, the cylinder rod 65 is positioned in the first position. At this time, the displacement member 64 is located at the right limit position. The first axis FX is established by the axis of the first roller 62. The axis of the first roller 62 is arranged coaxially with the first axis FX. The first axis FX is located inside the right end of the mounting plate 47. As shown in FIG. 5B, when the bucket hydraulic cylinder 66 is fully extended, the cylinder rod 65 is positioned in the second position. At this time, the displacement member 64 is located at the left limit position. The second axis SX is established by the axis of the second roller 63. The axis of the second roller 63 is arranged coaxially with the second axis SX. The second axis SX is located inside the left end of the mounting plate 47. Here, the two first sling members 73 are symmetrically arranged with the bucket hydraulic cylinder 66 interposed therebetween. Similarly, the two second sling members 74 are symmetrically arranged with the bucket hydraulic cylinder 66 in between. That is, the virtual plane including the axis of the bucket hydraulic cylinder 66 and orthogonal to the axis of the first roller 62 and the axis of the second roller 63 forms a plane of symmetry.

The annular groove 62a of the first roller 62 guides the sliding of the first sling material 73 around the axis. The first roller 62 can rotate around the axis to guide the slip. Similarly, the annular groove 63a of the second roller 63 guides the sliding of the second sling material 74 around the axis. The second roller 63 can rotate around the axis line to guide the slip. When the bucket hydraulic cylinder 66 contracts, the first roller 62 moves toward the right end according to the displacement of the displacement member 64. Since the other end of the first sling material 73 is fixed to the left end of the guide body 51, the first pulling material 73 drives the slider 48 in the first direction DR1 as the first roller 62 moves. Force acts. When the bucket hydraulic cylinder 66 is extended, the second roller 63 moves toward the left end according to the displacement of the displacement member 64. Since the other end of the second sling material 74 is fixed to the right end of the guide body 51, the second sling material 74 has a second pull that drives the slider 48 in the second direction DR2 as the second roller 63 moves. Force acts. In this way, the push plate 52 is driven from the right end to the left end of the mounting surface 47a. The push plate 52 can push down the load on the mounting surface 47a from the left end of the mounting surface 47a.

Next, the operation of the construction machine 11 will be described. As shown in FIG. 6A, in the bucket 32, the push plate 52 is positioned at a position as close as possible to the right end of the mounting surface 47a. At this time, in the bucket hydraulic cylinder 66, the cylinder rod 65 is positioned at the first position. The displacement member 64 is located at the right limit position. The first roller 62 is positioned coaxially with the first axis FX located inside the right end of the mounting plate 47. A first pulling force for driving the slider 48 acts on the first sling material 73 in the first direction DR1. The slider 48 is moved to the right side as much as possible in the guide path 49. Since the first sling material 73 is wound around the first axis FX, the first sling material is applied to the first tensile force when the push plate 52 is positioned to the maximum toward the right end of the mounting surface 47a. The 73, the first roller 62, the connecting member 67, and the displacement member 64 can be arranged inside the right end of the mounting plate 47. Although the push plate 52 is displaced to the right end of the mounting plate 47 to the maximum extent, it is possible to prevent the push plate driving mechanism 61 from protruding from the mounting plate 47 when the push plate 52 is driven.

As shown in FIG. 5A, at least one roller 56 enters the first slope 49b of the guideway 49. The push plate 52 changes its posture outward toward the right end of the mounting plate 47. In this way, although the position of the slider 48 is restricted to the inside of the right end of the mounting plate 47, the push plate 52 can be positioned as far as possible toward the right end. On the mounting surface 47a, the maximum spread can be ensured in the range used for mounting the load. Here, both rollers 56 may enter the first slope region 49b.

The undulating hydraulic cylinder 22 contracts. Boom 19 descends. The mounting plate 47 of the bucket 32 is as close to the ground as possible. When the construction machine 11 advances, the load M on the ground is scooped up in the scooping area 53a of the mounting plate 47. In this way, the load M is placed on the mounting surface 47a of the mounting plate 47. After that, the bucket 32 is positioned with respect to the loading platform of the dump truck, for example, in response to the rise of the boom 19 and the movement of the vehicle body 14.

As shown in FIG. 6B, the push plate 52 is driven from the right end to the left end of the mounting surface 47a. When the slider 48 is displaced along the linear region 49a of the guide path 49, the push plate 52 is displaced in parallel with the mounting surface 47a. In this way, the push plate 52 can move the load M on the mounting surface 47a from the right end to the left end. In driving the push plate 52, the cylinder rod 65 is displaced from the first position to the second position in the bucket hydraulic cylinder 66. When the cylinder rod 65 is positioned at the second position, the displacement member 64 is located at the left limit position. The second roller 63 is positioned coaxially with the second axis SX located inside the left end of the mounting plate 47. A second pulling force that drives the slider 48 acts on the second sling material 74 in the second direction DR2. The slider 48 is moved to the left side as much as possible in the guide path 49. Since the second sling material 74 is wound around the second axis SX, the second sling material is applied when the push plate 52 is positioned to the maximum toward the left end of the mounting surface 47a when the second tensile force is applied. The 74, the second roller 63, the connecting member 67, and the displacement member 64 can be arranged inside the left end of the mounting plate 47. Although the push plate 52 is displaced to the left end of the mounting plate 47 to the maximum, it is possible to prevent the push plate drive mechanism 61 from protruding from the mounting plate 47 when driving the push plate 52. The increase in size of the bucket 32 can be avoided. Such a bucket 32 can contribute to the realization of efficient work in a tunnel or a mine.

As shown in FIG. 5B, at least one roller 56 enters the second slope 49c of the guideway 49. The push plate 52 can change its posture outward from the left end of the mounting plate 47. In this way, although the position of the slider 48 is restricted to the inside of the left end of the mounting plate 47, the push plate 52 can be positioned as far as possible to the outside. The push plate 52 can completely cross the mounting surface 47a. Here, both rollers 56 may enter the second slope region 49c.

The push plate 52 pushes down the load M from the left end of the mounting surface 47a. The load M falls on the loading platform of the dump truck. At this time, since the mounting plate 47 is maintained in a horizontal posture without tilting, an increase in height can be avoided as compared with the side dump specification. Interference between the bucket 32 and the ceiling can be avoided in an enlarged work area in a tunnel or mine. The work area of the construction machine 11 can be expanded. More efficient work can be achieved in tunnels and mine.

The push plate 52 returns to the right end of the mounting surface 47a in response to the drop of the load M. Upon returning the push plate 52, the cylinder rod 65 is displaced from the second position to the first position in the bucket hydraulic cylinder 66. When the cylinder rod 65 is positioned in the first position, the displacement member 64 is located in the right limit position. The first roller 62 is positioned coaxially with the first axis FX located inside the right end of the mounting plate 47. A first pulling force for driving the slider 48 acts on the first sling material 73 in the first direction DR1. The slider 48 is moved to the right side as much as possible in the guide path 49. The undulating hydraulic cylinder 22 contracts. Boom 19 descends. The mounting plate 47 of the bucket 32 is as close to the ground as possible. In this way, the preparation for scooping up the load M can be prepared.

In the present embodiment, the bucket hydraulic cylinder 66 is guided between a first position that positions the first roller 62 coaxially with the first axis FX and a second position that positions the second roller 63 coaxially with the second axis SX. The cylinder rod 65 is moved parallel to the linear region 49a of the road 49. The push plate 52 can be displaced from the right end to the left end of the mounting surface 47a according to a simple expansion / contraction operation of the bucket hydraulic cylinder 66 (insertion / removal of the cylinder rod 65). At this time, the bucket hydraulic cylinder 66 can be accommodated in the range of the right end and the left end of the mounting plate 47. The increase in size of the bucket 32 can be avoided. Since the hydraulic cylinder is used to drive the push plate 52, the bucket 32 can be attached to the existing side dump construction machine 11a shown in FIG. 7. When the bucket 32 is attached to the construction machine 11a, the hydraulic pipe 72 connected to the hydraulic cylinder 77 of the side dump bucket 76 may be reconnected to the bucket hydraulic cylinder 66.

11 ... Construction equipment, 19 ... Boom, 32 ... Construction equipment bucket (bucket), 47 ... Mounting plate, 47a ... Mounting surface, 48 ... Slider, 49 ... Guideway, 49a ... Linear area, 49b ... First inclined area , 49c ... 2nd tilt area, 51 ... Guide body, 52 ... Push plate, 56 ... Roller, 62 ... 1st roller, 63 ... 2nd roller, 64 ... Displacement member, 65 ... Cylinder rod, 66 ... Power source (bucket) Hydraulic cylinder), 73 ... 1st sling material, 74 ... 2nd sling material, DR1 ... 1st direction, DR2 ... 2nd direction, FX ... 1st axis line, SX ... 2nd axis line.

Claims (4)

A mounting plate that is connected to the boom of construction machinery and has a mounting surface that holds the load when lifting the load.
A guide body connected to the mounting plate and having a guide path parallel to the above-mentioned mounting surface to guide the displacement of the slider.
A push plate that is coupled to the slider and driven from one end to the other end of the previously described mounting surface to push down the load on the previously described mounting surface from the other end .
A first sling material that extends in the first direction from the slider and is wound around a first axis located inside one end of the mounting plate when the push plate is positioned on one end of the above-mentioned mounting surface.
The inside of the other end of the mounting plate when the push plate is positioned at the other end of the above-mentioned mounting surface, which extends from the slider in the second direction opposite to the first direction and is parallel to the first axis. The second sling material that is wound around the second axis located in
A force that exerts a first tensile force that drives the slider in the first direction on the first sling material, and exerts a second tensile force that drives the slider in the second direction on the second sling material. With the source
A bucket for construction machinery characterized by being equipped with. In the bucket for construction machinery according to claim 1 , the power source is a first roller that guides the sliding of the first sling material around an axis, and a first roller that guides the sliding of the second sling material around the axis. At the first position where the cylinder rod is connected to the displacement member that supports the two rollers and the first roller is positioned coaxially with the first axis, and at the second position where the second roller is positioned coaxially with the second axis. A bucket for construction machinery, which is a hydraulic cylinder that moves the cylinder rod in parallel with the guide path between them. In the bucket for construction machinery according to claim 1 or 2, the slider is received by the guide path surrounded by the edge of the guide body, and is a roller having an annular groove coaxially formed with the rotation axis. A bucket for construction machinery characterized by being equipped with. A mounting plate that is connected to the boom of construction machinery and has a mounting surface that holds the load when lifting the load.
A guide body connected to the mounting plate and having a guide path extending in parallel with the above-mentioned mounting surface,
A slider having two rollers arranged at arbitrary intervals in the extending direction of the guideway and guided by the guideway,
It is provided with a push plate that is coupled to the slider and is driven from one end of the previously described mounting surface toward the other end to push down the load on the previously described mounting surface from the other end.
The guide path has a linear region extending in parallel with the direction of the displacement and a first inclination extending from one end of the linear region toward one end of the mounting plate and moving away from the above-mentioned mounting surface as the distance from one end of the linear region increases. It is characterized by having a region and a second inclined region extending from the other end of the linear region toward the other end of the mounting plate and moving away from the above-mentioned mounting surface as the distance from the other end of the linear region increases. Bucket for construction machinery.

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