JP3606851B2 - Grab bucket - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a grab bucket including a pair of bucket shells rotatably provided on a support frame.
[0002]
[Prior art]
When forming a water channel on the ground, first, after excavating the upper layer portion of the land, a U-shaped water channel block is continuously provided via a waterproof packing or the like.
If the waterway has been used for many years, earth and sand may accumulate in the waterway due to bad weather, etc., and the performance as a waterway may deteriorate.
[0003]
In such a case, if the water channel is small, the worker enters and discharges the earth and sand manually. Moreover, earth and sand may be sucked up with a hose using a manure processing vehicle or the like.
In addition, in the case of a side groove that is a little wider, the earth and sand may be scooped up using a cantilever bucket such as an excavator.
[0004]
[Problems to be solved by the invention]
However, when it is done manually, a great deal of labor is required, and when it is sucked up by a hose or the like, there is a problem that an irregular shape such as a large stone or wire is caught.
Also, when a cantilever bucket such as an excavator is used, it is difficult to scoop up the sludge accumulated with earth and sand, and it is necessary to repeat the work many times. There is a problem that it takes time.
[0005]
Here, it is conceivable to use a grab bucket that surrounds and lifts the scooping thing in a bag shape, but the normal grab bucket hits the side wall of the U-shaped water channel block because the bottom plate part is greatly swollen, There is a problem that the waterway block is damaged.
[0006]
Therefore, the problem to be solved by the present invention is to provide a grab bucket that can be inserted into a narrow space and securely grasped and taken out a solid or fluid.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the grab bucket of the present invention is provided in a support frame so as to be openable and closable, and includes a pair of bucket shells whose lower ends can be in contact with each other. The bucket shell includes the support frame. The bucket shell is provided so as to be pivotable on the parallel shafts provided at both ends thereof, and the intermediate portion of the bucket shell is located on the inner side of the lower end portion when the lower end portion is on the outer side in the horizontal direction with respect to the parallel axis of the support frame. positioned.
[0008]
The grab bucket is a device that supports a support frame with an arm or a chain and can move to a target work place, and opens and closes the bucket shell using a drive source or its own weight. Moreover, the inside means the direction in which the bucket shell closes, and the outside means the direction in which the bucket shell opens.
[0009]
When the grab bucket is opened to a predetermined opening and moved to the work place, when the lower end of the bucket shell is outside the parallel axis of the support frame, the intermediate portion of the bucket shell is located inside the lower end. When the width (opening width) of the lower end portion of the bucket shell is moved in accordance with the width of the work place, the intermediate portion protrudes to the side and does not hit the side wall or the like.
[0010]
Also, when the lower end of the bucket shell is inside the parallel axis of the support frame, the intermediate part is located inside the parallel axis of the support frame. It can be performed.
Next, when the object to be carried is gripped at the work place, the maximum width of the bucket shell becomes equal to the width of the support frame.
[0011]
The bucket shell is provided with a flat plate portion having an upper end pivotable on the parallel shaft, and triangular plate-like side plate portions provided on both sides of the flat plate portion, and the paired bucket shells are closed. It is also possible to provide the lower end portion of the flat plate portion and the end portion of the side plate portion so as to contact each other.
The case where the side end portion is in contact includes not only the case where the opposing end surfaces are in contact with each other but also the case where the side end portions intersect and overlap each other.
With this configuration, when the bucket shell is closed, it is formed in a triangular prism shape that is placed horizontally. When inserting into the narrow space part sandwiched between the parallel plates, the position of the lower end part of the flat plate part is aligned with the position of the narrow insertion part.
Further, since the side plate portions are provided on both sides of the flat plate portion, the flat plate portion and the side plate portion can be formed from a single plate-like member.
It is preferable to form a cutting blade part in the side edge part used as a pair, respectively. According to such a configuration, the stem or wood piece of the plant is cut by the side end portion, and the side end portion is reliably closed, water leakage from the lower portion can be prevented, and the collection can be reliably performed.
[0012]
It is also possible to form a claw portion that can mesh with each other at the lower end portion of the flat plate portion and close the gap.
When the nail part is formed, for example, it can be scraped off while cutting the roots of plants stuck to the side and bottom of the water channel block, and it can be scraped off while crushing the solidified layer of earth and sand etc. it can.
[0013]
The support frame can be attached to the tip of an arm of a work vehicle, and the bucket shell can be opened and closed by a hydraulic cylinder attached to the support frame and capable of moving the rod back and forth toward the opening of the bucket shell. is there.
[0014]
By attaching the support frame to the tip of the arm of the work vehicle, the movement can be performed quickly, and even a heavy object can be reliably gripped by being driven by a hydraulic power source.
In addition, since the forward / backward direction of the hydraulic cylinder is directed toward the opening of the bucket shell, the width of the support frame can be set narrow.
[0015]
It is preferable that a buffer layer for preventing damage due to a collision is provided on the outer periphery of the support frame and the outer surface of the bucket shell.
The buffer layer can be formed, for example, by lining a rubber-based coating or a flexible sheet such as a foam material or a rubber plate.
By providing the buffer layer, the water channel block can be prevented from being chipped or cracked when colliding with a concrete member such as a water channel block.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention are described below.
1 is a side sectional view of the grab bucket of the present invention, FIG. 2A is a front sectional view of the grab bucket, and FIG. 1B is an explanatory view of a claw portion of the grab bucket.
[0017]
As shown in FIGS. 1 and 2, the grab bucket 1 of the present invention has a rectangular support frame 2 in plan view, and a claw portion 3 provided at the lower end of the support frame 2 so as to be opened and closed. A pair of bucket shells 5 and 6 are provided that can mesh 4 with each other to close the gap.
[0018]
The support frame 2 has rectangular bar-like members 7 and 8 having a rectangular cross section arranged in parallel with an interval of, for example, 40 to 150 cm, and both ends of the square bar-like members 7 and 8 are separated by other square bar-like members 9 and 10. It is welded. For example, when the grab bucket 1 is used for cleaning in a water channel connected to a U-shaped water channel block, the lengths and intervals of the rectangular bar-like members 7 and 8 are formed slightly smaller than the length and groove width of the water channel block. Keep it. With this configuration, work in one water channel block can be performed by a single opening / closing operation, and work efficiency is good.
[0019]
Round rod-like parallel shafts 11 and 12 are provided in parallel below the rectangular rod-like members 7 and 8 of the support frame 2 via connection members 15. A small gap is formed between the parallel shafts 11 and 12 and the square bar-like members 7 and 8 in order to rotatably arrange the bucket shells 5 and 6.
[0020]
The bucket shell 5 provided on the left side of FIG. 1 includes a flat plate portion 16 having an upper end portion that can be pivoted on a parallel shaft 11, and triangular plate-like side plate portions 13 and 14 provided on both sides of the flat plate portion 16. It has.
[0021]
The flat plate portion 16 is made of, for example, a flat plate having a thickness of about 5 to 10 mm. The upper end portion is bent into a cylindrical shape to form a bearing portion, and is attached to the parallel shaft 11 so as to be rotatable.
The claw portion 3 provided at the lower end portion of the flat plate portion 16 is formed to be bent inward at an angle of, for example, about 120 to 150 ° with respect to the flat plate portion 16 and has a length of about 20 to 40 mm. It is formed short and spills from between the claw portions 3 to reduce residues remaining without being collected. In addition, the nail | claw part 3 can also be formed on the same plane as the flat plate part 16, without making it bend, and can also be abbreviate | omitted. The shape of the claw portion 3 is formed in a rectangular comb shape as shown in FIG. 2B, but may be other shapes such as a trapezoid or a triangle.
The side plate portions 13 and 18 are each formed with a cutting blade portion (not shown), and can cut a plant or a piece of wood sandwiched between them.
[0022]
The bucket shell 6 provided on the right side of FIG. 1 has the same shape as the bucket shell 5 and includes a flat plate portion 17, side plate portions 18 and 19, and a claw portion 4.
The pair of bucket shells 5, 6 are in the closed state shown by the solid line in FIG. 1, and when the claw portions 3, 4 provided at the lower ends of the flat plate portions 16, 17 are engaged, the left side plate portion 13 And the end of the right side plate 18 intersect with each other so that they overlap each other by about 10 to 30 mm, and the end of the left side plate 14 and the end of the right side plate 19 meet each other. It is arranged to touch. The angle θ1 between the flat plate portions 16 and 17 in the closed state is, for example, about 40 to 60 °.
[0023]
As shown in FIG. 1, the width B1 when the flat plate portions 16 and 17 are arranged in parallel is substantially equal to the width of the parallel shafts 11 and 12 plus the thickness of the flat plate portions 16 and 17. That is, when the claw portions 3 and 4 of the bucket shells 5 and 6 are located inside the width B1, the flat plate portions 16 and 17 disposed in the intermediate portions of the bucket shells 5 and 6 are disposed inside the range B1. , Do not protrude outward.
Therefore, when the flat plate portions 16 and 17 are arranged in parallel, the grab bucket is inserted into a groove having a width B1 between the flat plate portions 16 and 17 or the width B2 of the support frame 2 and the width B1 or The conveyed object staying at the bottom in the width B2 can be reliably gripped.
[0024]
Further, when the claw portions 3 and 4 are outside the width B1, the flat plate portions 16 and 17 are located inside the claw portions 3 and 4, so that the groove width is within the groove wider than the width B2 of the support frame 2. When the grab bucket is used, the operation can be performed by inserting the claw portions 3 and 4 in accordance with the width of the groove to be inserted. Of course, even in this case, the intermediate portion of the flat plate portions 16 and 17 does not protrude to the side of the groove.
[0025]
A buffer layer for preventing damage due to collision is provided on the outer periphery of the support frame 2 and the outer surfaces of the bucket shells 5 and 6, and further on the outer surfaces of the holding frame 20 and the attachment member 21 by applying a rubber-based elastic coating. It has been. With this configuration, the grab bucket 1 is prevented from colliding with a concrete water channel block or the like and damaging them.
[0026]
Next, the drive structure of the bucket shells 5 and 6 will be described.
A retaining frame 20 having a quadrangular frustum-shaped side surface is provided on the upper portion of the support frame 2 for reinforcement, and an attachment member 21 having a rectangular cross section is provided at the upper center of the retaining frame 20.
Inside the attachment member 21, a hydraulic cylinder 22 is supported so as to be able to rotate by allowing the rod 23 to protrude downward.
[0027]
The tip portion of the rod 23 and the inner central portions of the flat plate portions 16 and 17 are rotatably connected by L-shaped connecting members 24 and 25 each having a rotating portion at both ends.
[0028]
When the rod 23 is raised, the flat plate portions 16 and 17 are rotated inward via the connecting members 24 and 25, and the bucket shells 5 and 6 are closed. Further, when the rod 23 is lowered, the flat plate portions 16 and 17 are rotated outward and the bucket shells 5 and 6 are opened. In the present embodiment, the maximum opening angle θ2 of the bucket shells 5 and 6 is 150 to 160 °. Since the maximum opening angle θ2 is set small, the stroke of the rod 23 can be reduced, and the hydraulic cylinder 22 is arranged vertically to prevent the width B2 of the support frame 2 from increasing.
[0029]
A connecting hole 26 is formed in the upper portion of the attachment member 21, and the tip of an arm of a work vehicle (not shown) can be fixed to the connecting hole 26. That is, the support frame 2 is attached to the arm via the attachment member 21.
The hydraulic cylinder 22 is operated by an operator who is mounted on the work vehicle by attaching a flexible tube (not shown) to a hydraulic pressure supply unit provided in the work vehicle.
[0030]
Next, a procedure for using the grab bucket 1 will be described.
FIG. 3 is a perspective view showing a usage state of the grab bucket.
As shown in FIG. 3, when carrying out sediment and sludge in a water channel in which a U-shaped water channel block 27 is continuously provided via a connecting block 28 and waterproof packing or the like, first, an arm 29 to which the grab bucket 1 is attached is attached. The provided work vehicle is moved to a position adjacent to the waterway block.
Reinforcing triangular ribs 30 are provided at the inner corners of the U-shaped connecting block 28.
[0031]
Next, the longitudinal direction of the grab bucket 1 is matched with the flow direction of the water channel, and the claw portions 3 and 4 of the grab bucket 1 are lowered according to the width of the water channel. At this time, the claw portions 3 and 4 are lowered along the side wall of the water channel block 27, but the main body portions of the flat plate portions 16 and 17 are disposed on the inner side of this width, so that they collide with the side wall of the water channel block. This side wall is not broken. In addition, since the outer surface of the grab bucket 1 is elastically coated, the side wall is not chipped or cracked even if it collides.
When the claw portions 3 and 4 abut on the bottom of the water channel block 27, the claw portions 3 and 4 abut near the inner corners of the water channel block 27. By closing the bucket shells 5 and 6 from this state, earth and sand and sludge staying at the bottom are reliably recovered in the bucket shells 5 and 6. Further, since there is no leftover of earth and sand remaining in the vicinity of the inner corner, the work can be reliably completed by the length of the grab bucket 1.
The earth and sand in the bucket shells 5 and 6 are thrown away to a predetermined discharge position or accumulated in a collection tank provided in a truck or the like.
Next, the work vehicle is moved along the water channel by the length of the grab bucket 1 and the same work is performed.
The length of the grab bucket 1 in the flow direction of the water channel is used because the ribs 30 and the waterproof packing of the connecting block 28 provided between the adjacent water channel blocks 1 may protrude from the water channel side and become an obstacle. It is preferable to form it slightly smaller than the length of the water channel block 27 to be formed.
[0032]
【The invention's effect】
The present invention has the following effects.
(1) The bucket shell is rotatably provided on each of the parallel shafts provided at both ends of the support frame, and the intermediate portion of the bucket shell has a lower end when the lower end is in the horizontal direction outside the parallel axis of the support frame. Because it is located on the inner side of the part, the middle part of the bucket shell protrudes to the side of the space part and hits the side wall etc. when inserted in accordance with the width of the lower end part of the bucket shell to the width of the space part to be inserted The solid material and the fluid can be securely grasped and taken out by being inserted into the narrow space.
(2) Since the bucket shell is provided with a flat plate portion and a triangular plate-like side plate portion, when inserted into a narrow space portion sandwiched between parallel plates, the position of the lower end portion of the flat plate portion and the position of the narrow insertion portion Alignment is easy and it can be gripped more reliably. Further, since the side plate portions are provided on both sides of the flat plate portion, the flat plate portion and the side plate portion can be formed from a single plate-like member, which facilitates manufacture.
(3) By forming a claw portion that can mesh with each other at the lower end portion of the flat plate portion to close the gap, it can be scraped off while cutting the roots of plants stuck to the bottom portion in the space portion, Can be scraped off while breaking down the solidified layer.
(4) When the support frame is attached to the tip of the arm of the work vehicle and the bucket shell is opened and closed by a hydraulic cylinder capable of moving the rod back and forth toward the opening of the bucket shell, the movement can be performed quickly. At the same time, even heavy objects can be securely gripped. Moreover, since the advancing / retreating direction of the hydraulic cylinder is directed to the opening portion of the bucket shell, the width of the support frame can be set narrow, and work in a narrow space portion can be handled.
(5) If a buffer layer is provided on the outer periphery of the support frame and the outer surface of the bucket shell, it is possible to prevent the channel block from being chipped or cracked when it collides with a concrete member such as a channel block. it can.
[Brief description of the drawings]
FIG. 1 is a side cross-sectional view of a grab bucket of the present invention.
2A is a front sectional view of the grab bucket, and FIG. 2B is an explanatory view of a claw portion of the grab bucket.
FIG. 3 is a perspective view showing a usage state of the grab bucket.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Grab bucket 2 Support frame 3, 4 Claw part 5, 6 Bucket shell 7-10 Square rod-shaped member 11, 12 Parallel shaft 13, 14 Side plate part 15 Connection member 16, 17 Flat plate part 18, 19 Side plate part 20 Holding frame 21 Attachment Member 22 hydraulic cylinder 23 rod 24, 25 connecting member 26 connecting hole 27 water channel block 28 connecting block 29 arm 30 rib

Claims (4)

In the grab bucket provided with a pair of bucket shells that can be opened and closed on the support frame and can abut the lower ends of each other,
The bucket shell is provided so as to be rotatable on parallel shafts provided at both ends of the support frame,
The intermediate portion of the bucket shell is located inside the lower end when the lower end is horizontally outside the parallel axis of the support frame ,
The support frame is attached to a tip portion of an arm of a work vehicle, and the bucket shell is opened and closed by a hydraulic cylinder attached to the support frame and capable of moving a rod back and forth toward an opening of the bucket shell. And grab bucket. The bucket shell includes a flat plate portion having an upper end pivotably provided on the parallel shaft, and triangular plate-like side plate portions provided on both sides of the flat plate portion, and the pair of bucket shells in a closed state. The grab bucket according to claim 1, wherein the grab bucket is provided so that a lower end portion of the flat plate portion and an end portion of the side plate portion are brought into contact with each other. The grab bucket according to claim 2 , wherein a claw portion that can mesh with each other and close a gap is formed at a lower end portion of the flat plate portion. Wherein the outer surface of the outer peripheral and the bucket shell of the support frame, grab bucket according to any one of claims 1 3 buffer layer is characterized that you have provided to prevent damage due to collision.

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