JP4763729B2 - Drilling bucket - Google Patents

Description

  The present invention relates to an excavation bucket that is installed in a construction machine such as a hydraulic excavator and is preferably used for excavation work of earth and sand.

  In general, a hydraulic excavator as a representative example of a construction machine is a self-propelled lower traveling body, an upper revolving body that is swingably mounted on the lower traveling body, and can be raised and raised on the front side of the upper revolving body. And a working device provided. The excavator working device includes a boom, an arm, a digging bucket, and the like, and performs excavation work such as earth and sand by rotating the digging bucket on the tip side of the arm.

  Here, the excavating bucket of the hydraulic excavator includes a bottom plate, left and right side plates that are provided on both the left and right sides of the bottom plate and together with the bottom plate to form a sand-and-sand holding portion, and a side edge that is provided on the opening side of each side plate. And a cutting edge provided between the side edges and provided on the front end side of the bottom plate. Usually, a plurality of excavation claws project from the cutting edge.

  In this case, the excavation bucket excavates the earth and sand with the cutting edge and the side edge in a state where the ground is crushed by the excavation claw, and the excavated earth and sand is formed in the earth and sand container formed by the bottom plate and the left and right side plates. After being accommodated in the container, it is discharged to a desired earthing location.

  By the way, for example, when excavating highly viscous sediment containing a large amount of moisture, the sediment adheres to the inner surface of the bottom plate and the inner surfaces of the left and right side plates that form the sediment receiving portion of the excavation bucket. It will remain. In this case, since the capacity of the earth and sand accommodating portion of the excavation bucket is reduced by the amount of adhering earth and sand, there is a problem that the work efficiency of the actual excavation work is lowered.

  To solve such a problem, a chain formed by arranging a plurality of chained objects in parallel is movably attached to the bottom plate of the excavation bucket, and when the earth and sand scooped up in the excavation bucket is discharged to the outside, the chain There has been proposed an excavation bucket that can suppress adhesion of earth and sand to a bottom plate or the like by pressing the earth and sand away from the bottom plate by a body (see, for example, Patent Document 1).

JP-A-7-286337

  However, in the above-described prior art, since the chain attached in the excavation bucket is composed of a plurality of chain objects, the volume of the chain occupied in the excavation bucket is increased, and accordingly, the earth and sand of the excavation bucket is increased. There is a problem that the capacity of earth and sand that can be accommodated in the accommodating portion is reduced.

  In addition, since the chain is movably attached to the excavation bucket, the chain collides with the bottom plate, left and right side plates, etc. of the excavation bucket as the excavation bucket moves. There is a problem that noise is generated.

  The present invention has been made in view of the above-described problems of the prior art, and provides an excavation bucket capable of suppressing the adhesion of earth and sand to the inner surface of the earth and sand container and ensuring a large capacity in the earth and sand container. The purpose is to do.

In order to solve the above-described problems, the present invention provides a concavely curved bottom plate, left and right side plates that are provided on both the left and right sides of the bottom plate and together with the bottom plate form a sediment containing portion, and an opening side of each side plate. An inner surface of the bottom plate forming the earth and sand containing portion, and a left and right side edge provided on the cutting plate and a cutting edge located between the side edges and provided on a tip side of the bottom plate. In addition , the present invention is applied to a drilling bucket in which an embossed plate having a large number of protrusions is provided on the inner surface of the left and right side plates .

The feature of the configuration invention of claim 1 is employed, the protrusions of the front disappeared Nbosu plate is formed into an elliptical shape having a width direction and a longitudinal direction, the embossing plate, length of each protrusion The direction is arranged in parallel to the flow direction of the earth and sand discharged from the earth and sand container to the outside .

According to a second aspect of the present invention, the embossed plate is attached to the inner surface of the bottom plate and / or the inner surface of the left and right side plates using any one of bolts, rivets, and welding. It is in.

The invention of claim 3 is that the embossed plate is formed using any one material of stainless steel, steel, and water-repellent resin.

  According to the invention of claim 1, when the earth and sand are excavated by the excavation bucket by providing the embossed plate having a large number of protrusions on the inner side surface of the bottom plate and / or the inner side surface of the left and right side plates, The earth and sand accommodated in the accommodating portion come into contact with the embossed plate with a large contact area. For this reason, the moisture contained in the earth and sand is discharged so as to ooze out, and the moisture discharged from the earth and sand is a layer of moisture between the bottom plate and / or the embossed plate fixed to the inner surface of each side plate and the earth and sand. By forming the (film), the adhesion of earth and sand to the excavation bucket can be reduced.

  As a result, even when excavating highly viscous soil containing a large amount of water, for example, it is possible to prevent the sediment from adhering to and remaining in the sediment storage part. A large amount can be secured, and workability when excavating earth and sand can be improved.

In addition , by arranging the longitudinal direction of each protrusion of the embossed plate in parallel with the flow direction of the earth and sand discharged from the earth and sand container, when the earth and sand contained in the earth and sand container is discharged, the earth and sand are removed. It can be moved along the arrangement of the protrusions of the embossed plate and discharged smoothly.

According to the invention of claim 2 , the emboss plate is detachably attached to the bottom plate and / or each side plate using a bolt, and the emboss plate is detachably attached to the bottom plate and / or each side plate using a rivet. Thus, for example, workability when replacing a worn embossed plate with a new embossed plate can be improved. On the other hand, when the embossed plate is attached to the bottom plate and / or each side plate by welding, it is not necessary to place the fixture for attaching the embossed plate in the earth and sand container, so that it is discharged from the earth and sand container. The flow of earth and sand is not obstructed by the fixture, and the earth and sand can be discharged quickly.

According to the invention of claim 3 , the embossed plate is formed using any one material of stainless steel, steel, and water repellent resin material, thereby excavating highly viscous earth and sand containing a large amount of moisture. Even in this case, it is possible to suppress the earth and sand from adhering to the earth and sand container.

  Hereinafter, an embodiment of the excavation bucket according to the present invention will be described in detail with reference to the accompanying drawings, taking an excavation bucket equipped in a hydraulic excavator as an example.

  In the figure, 1 is a hydraulic excavator, and the hydraulic excavator 1 is roughly constituted by a crawler-type lower traveling body 2 that can be self-propelled and an upper revolving body 3 that is pivotably mounted on the lower traveling body 2. The working device 4 is provided on the front side of the upper swing body 3 so as to move up and down.

  Here, the working device 4 includes a boom 5 attached to the front side of the upper swing body 3 so as to be able to move up and down, an arm 6 attached to the tip side of the boom 5 so as to be able to move up and down, A bucket link 7 rotatably attached to the distal end side, an excavation bucket 11 described later rotatably attached to the distal end side of the arm 6 and the bucket link 7, a boom cylinder 8, an arm cylinder 9, and a bucket cylinder 10 And is roughly composed. And the working device 4 performs the excavation work of earth and sand etc. by rotating the excavation bucket 11 on the front end side of the arm 6 while raising and lowering the boom 5 and the arm 6.

  An excavation bucket 11 is rotatably attached to the distal end side of the arm 6. The excavation bucket 11 excavates the ground or the like, scoops up the earth and sand, and discharges it to a desired earth discharge location. Here, as shown in FIGS. 2 to 5, the excavation bucket 11 includes a bottom plate 12, left and right side plates 13 and 14, left and right side edges 16 and 17, a cutting edge 19, and a bottom plate embossing plate, which will be described later. 22 and an embossing plate 26 for side plates.

  Reference numeral 12 denotes a concave curved bottom plate that forms the bottom of the excavation bucket 11, and the bottom plate 12 forms an earth and sand container 15 together with left and right side plates 13 and 14 described later. Here, the bottom plate 12 has a concave curved portion 12A that is curved in an arc shape by, for example, bending a steel plate material, and is configured by a plate body having a substantially U-shaped cross-sectional shape as a whole. Yes. Further, a plurality of bolt holes (female screw holes) 12B, 12B,... Are screwed on both sides of the bottom plate 12 in the upper and lower directions and on the left and right sides.

  A bracket 21 described later is fixed to one end side (base end side) in the upper and lower directions of the bottom plate 12, and a cutting edge described later is connected to the other end side (front end side) in the upper and lower directions of the bottom plate 12. 19 is fixed. Further, a bottom plate emboss plate 22 to be described later is disposed on the inner side surface 12 </ b> C located on the earth and sand container 15 side of the bottom plate 12.

  13 and 14 are left and right side plates provided on both the left and right sides of the bottom plate 12, and the left and right side plates 14, 14 and the bottom plate 12 form an earth and sand accommodating portion 15 for accommodating excavated earth and sand. Yes. Here, the left and right side plates 13 and 14 are formed in a substantially semicircular flat plate shape using, for example, a steel plate material, and face the bottom plate 12 with a certain interval in the left and right directions with the bottom plate 12 therebetween. The left and right ends of 12 are fixed by means such as welding. In addition, a plurality of bolt holes (female screw holes) 13A and 14A are screwed to the peripheral portions of the left and right side plates 13 and 14, respectively.

  And the left and right side edges 16 and 17 which are mentioned later are provided in the site | part used as the opening side of the earth and sand accommodating part 15 among the left and right side plates 13 and 14, respectively. Further, a side plate embossing plate 26 to be described later is arranged on the inner side surface 13B of the left side plate 13 on the side of the earth and sand accommodating portion 15 and the inner side surface 14B of the right side plate 14 on the side of the earth and sand containing portion 15 respectively. It is a configuration to be installed.

  16 is a left side edge provided on a portion of the left side plate 13 that is on the opening side of the earth and sand accommodating portion 15, and 17 is a right side edge that is provided on a portion of the right side plate 14 that is on the opening side of the earth and sand accommodating portion 15. Show. Here, the left and right side edges 16 and 17 are formed in a rectangular flat plate shape using, for example, a steel plate material thicker than the side plates 13 and 14, and are welded to the opening sides of the side plates 13 and 14, respectively. It extends upward and downward. The upper ends of the left and right side edges 16 and 17 are connected by a cylindrical reinforcing member 18, and a bracket 21 described later is fixed to the reinforcing member 18 and the base end side of the bottom plate 12.

  A cutting edge 19 is located between the left and right side edges 16 and 17 and is provided on the tip side of the bottom plate 12. The cutting edge 19 excavates the ground and the like together with the left and right side edges 16 and 17. Is. Here, the cutting edge 19 is formed in a rectangular flat plate shape using, for example, a steel plate material thicker than the bottom plate 12 and is welded to the front end portion of the bottom plate 12 and extends left and right. The left and right ends of the cutting edge 19 are welded to the lower ends of the left and right side edges 16 and 17, respectively. In addition, a plurality of excavation claws 20, 20,...

  21 and 21 are a pair of left and right brackets fixed to the left and right central portions of the reinforcing member 18 and the base end side of the bottom plate 12. These brackets 21 are respectively connected to the distal end side of the arm 6 and the bucket link 7. It is pin-coupled to the front end side. Thereby, the excavation bucket 11 is connected to the arm 6 and the bucket link 7, and rotates upward and downward on the distal end side of the arm 6 according to the expansion and contraction of the bucket cylinder 10.

  The excavation bucket 11 excavates the earth and sand with the cutting edge 19 and the left and right side edges 16 and 17 while excavating the ground by the excavating claws 20 protruding from the cutting edge 19. It is configured to scoop up and store the earth and sand in the earth and sand container 15.

  Reference numeral 22 denotes an uneven plate or an embossed plate (hereinafter referred to as an embossed plate for the bottom plate) provided on the inner side surface 12C of the bottom plate 12 and having a large number of protrusions 22A formed on the surface. As shown in FIGS. 3 to 8, the bottom plate embossing plate 22 is formed by continuously embossing a plate material made of, for example, a stainless steel material (SUS material), so that a large number of protrusions are formed at regular intervals. .. And a flat plate 22B located between the projections 22A. In this case, as shown in FIGS. 6 to 8, each protrusion 22A is formed in an elliptical shape having a dimension B in the longitudinal direction larger than the dimension A in the width direction, and is formed in the front, rear, left, and right directions. They are aligned so as to be parallel to each other at a constant interval.

  Further, the upper and lower intermediate portions of the bottom plate emboss plate 22 are concave curved portions 22C corresponding to the concave curved portion 12A of the bottom plate 12, and both the upper and lower ends of the bottom plate emboss plate 22 and the left and right sides. Bolt insertion holes 22D, 22D,... Corresponding to the respective bolt holes 12B of the bottom plate 12 are formed at both ends in the direction.

  Then, the bottom plate emboss plate 22 is attached to and detached from the inner side surface 12C of the bottom plate 12 by screwing the bolts 23 inserted into the respective bolt insertion holes 22D of the bottom plate emboss plate 22 into the respective bolt holes 12B formed in the bottom plate 12. The inner surface 12 </ b> C of the bottom plate 12 is covered by the bottom plate emboss plate 22 over almost the entire region.

  Thus, by attaching the embossing plate 22 for the bottom plate having a large number of protrusions 22A to the inner side surface 12C of the bottom plate 12, when the earth and sand containing a large amount of moisture is excavated, the moisture contained in the earth and sand is removed. Utilizing the structure, the adhesion of earth and sand to the excavation bucket 11 can be reduced.

  That is, for example, as shown in FIG. 9, when the amount of earth and sand 25 accommodated in the excavation bucket 11 is small in the initial stage of excavating earth and sand 25 containing a large amount of moisture 24, A small amount of earth and sand 25 holding a large amount of moisture 24 is deposited on the upper surfaces of the protrusions 22A and the flat portions 22B.

  In this state, when the earth and sand 25 is further stored in the excavation bucket 11 and the earth and sand 25 accumulates thickly on the upper surface of the embossing plate 22 for the bottom plate as shown in FIG. A compressive load is applied by force. In this case, since the bottom plate emboss plate 22 is provided with a large number of projections 22A, the contact area between the bottom plate emboss plate 22 and the earth and sand 25 is large, and the earth and sand 25 is in a compacted state. For this reason, the water | moisture content 24 contained in the earth and sand 25 oozes out gradually, and is eventually discharged | emitted by the plane part 22B of the embossing board 22 for bottom boards. As a result, the discharged moisture 24 forms a moisture layer (film) between the bottom plate embossing plate 22 and the earth and sand 25, thereby reducing the adhesion of the earth and sand to the excavation bucket 11. .

  On the other hand, when the earth and sand accommodated in the earth and sand accommodating part 15 of the excavation bucket 11 are discharged | emitted outside, this earth and sand will flow in the arrow F direction in FIG.5 and FIG.6. On the other hand, the bottom plate embossing plate 22 is arranged such that the longitudinal direction of each of the elliptical projections 22A is parallel to the flow direction F of earth and sand discharged to the outside. Accordingly, when the earth and sand in the earth and sand container 15 is discharged, the earth and sand are smoothly moved along the arrangement of the protrusions 22A of the embossing plate 22 for the bottom plate and quickly discharged to the outside of the earth and sand container 15. It is the structure which can do.

  26 and 26 are provided on the inner side surface 13B of the left side plate 13 and the inner side surface 14B of the right side plate 14, and are uneven or embossed plates for side plates (hereinafter referred to as embossed plates for side plates) having a large number of projections 26A formed on the surface. It is shown). These left and right side plate embossed plates 26 are formed in a continuous manner at regular intervals by embossing a plate material made of, for example, stainless steel (SUS material), like the bottom plate embossed plate 22. Are formed as a plate body (see FIG. 3). The projections 26A, 26A,...

  Each projection 26A provided on the side plate embossing plate 26 is also formed in an elliptical shape having a dimension in the longitudinal direction larger than the dimension in the width direction, like each projection 22A of the embossing plate 22 for the bottom plate. , The rear side, the left side, and the right side are arranged in parallel with each other at a constant pitch. Each of the side plate emboss plates 26 is formed in a substantially semicircular plate shape corresponding to the left and right side plates 13 and 14, and the left and right side plates 13 are disposed at the peripheral edge of each side plate emboss plate 26. A plurality of bolt insertion holes 26C, 26C,... Corresponding to the respective bolt holes 13A, 14A are formed.

  Then, the side plate embossing plate 26 is attached to and detached from the inner side surface 13B of the left side plate 13 by screwing the bolts 27 inserted into the respective bolt insertion holes 26C of the side plate embossing plate 26 into the respective bolt holes 13A of the left side plate 13. Fixed as possible. Further, the side plate embossing plate 26 is attached to and detached from the inner side surface 14B of the right side plate 14 by screwing the bolts 27 inserted into the respective bolt insertion holes 26C of the side plate embossing plate 26 into the respective bolt holes 14A of the right side plate 14. Fixed as possible. As a result, the inner side surfaces 13B, 14B of the left and right side plates 13, 14 are covered by the side plate emboss plates 26 over almost the entire area.

  Therefore, like the above-described embossed plate 22 for the bottom plate, the contact area between the earth and sand accommodated in the excavation bucket 11 and the left and right side plate embossed plates 26 is increased, and moisture is easily discharged from the earth and sand. The discharged moisture forms a moisture layer between the side plate emboss plates 26 and the earth and sand, thereby reducing the adhesion of the earth and sand to the excavation bucket 11.

  Further, when the flow direction of earth and sand discharged from the earth and sand container 15 of the excavation bucket 11 is an arrow F direction in FIG. 5 and FIG. 6, each side plate emboss plate 26 has a length of each protrusion 26A. It arrange | positions so that a direction may become parallel to the flow direction F of the earth and sand discharged | emitted from the earth and sand accommodating part 15 outside. Thereby, when the earth and sand in the earth and sand accommodating part 15 is discharged | emitted, earth and sand can be smoothly moved along the arrangement | sequence of each projection part 26A provided in the left and right side board embossing board 26, and earth and sand accommodation It becomes the structure which can discharge | emit quickly from the part 15. FIG.

  The bottom plate emboss plate 22 and the left and right side plate emboss plates 26 are not limited to stainless steel (SUS material), and are formed using a steel material such as a general structural rolled steel material (SS material). It may also be formed using a water-repellent resin material such as polytetrafluoroethylene (PTFE).

  The excavation bucket 11 according to the present embodiment has the above-described configuration. When excavation work such as earth and sand is performed using the excavator 1 provided with the excavation bucket 11, the boom 5 and the arm 6 are moved up and down. By doing so, for example, the excavation bucket 11 is lowered with each excavation claw 20 facing the ground.

  Thereby, the excavation bucket 11 excavates the earth and sand with the cutting edge 19 and the left and right side edges 16 and 17 in a state where the ground or the like is crushed by each excavation claw 20, and the excavated earth and sand are collected into the earth and sand container 15. Crawling up and housed inside. Then, the excavator 1 rotates the excavating bucket 11 while rotating the boom 5 and the arm 6 in a state where, for example, the upper revolving body 3 is swung and turned to a desired soil removal location, thereby excavating the bucket 11. The earth and sand accommodated in the earth and sand accommodating part 15 is discharged to an earth discharging place.

  In this case, as shown in FIG. 9, when the amount of earth and sand 25 accommodated in the excavation bucket 11 is small in the initial stage of excavation of earth and sand 25 containing a large amount of moisture 24, A small amount of earth and sand 25 holding a large amount of moisture 24 is deposited on the upper surfaces of the protrusions 22A and the flat portions 22B.

  Further, by accommodating the earth and sand 25 in the excavation bucket 11, as shown in FIG. 10, the earth and sand 25 is deposited thickly on the upper surface of the embossing plate 22 for the bottom plate, and the excavation force of the working device 4 applies to the earth and sand 25. A compressive load is applied. In this case, since the bottom plate embossing plate 22 is provided with a large number of protrusions 22A, the contact area between the bottom plate embossing plate 22 and the earth and sand 25 is increased, and the earth and sand 25 is brought into a compacted state. As a result, the water 24 gradually oozes from the earth and sand 25 and is discharged to the flat portion 22B of the embossing plate 22 for the bottom plate, and this water 24 spreads between the embossing plate 22 for the bottom plate and the earth and sand 25 to form a moisture layer. Form.

  In this way, the earth and sand accommodated in the earth and sand accommodating part 15 of the excavation bucket 11 is easily separated from the surface of the bottom plate emboss plate 22 and the surfaces of the left and right side plate emboss plates 26 and 26. The adhesion of earth and sand to the bucket 11 can be reduced, and the earth and sand can be reliably discharged to the outside of the earth and sand container 15. Therefore, even when excavating soil containing a large amount of moisture, it is possible to prevent the sediment from adhering to and remaining in the sediment containing portion 15 of the excavating bucket 11 and to always ensure a large capacity in the sediment containing portion 15. Therefore, the workability of excavation work using the excavation bucket 11 can be improved.

  Moreover, the embossing plate 22 for the bottom plate is arranged so that the longitudinal direction of each protrusion 22A is parallel to the flow direction F of the earth and sand discharged from the earth and sand container 15 to the outside, and the left and right side board embossing plates 26 and 26 are arranged so that the longitudinal direction of each protrusion 26A is parallel to the flow direction F of earth and sand discharged from the earth and sand container 15 to the outside.

  As a result, the earth and sand discharged from the earth and sand container 15 along the protrusions 22A provided on the bottom plate embossing plate 22 and the protrusions 26A provided on the left and right side plate embossing plates 26. It can move smoothly. As a result, the excavated earth and sand can be quickly discharged from the earth and sand container 15, and the workability of excavation work using the excavation bucket 11 can be further enhanced.

  Further, the bottom plate emboss plate 22 is detachably attached to the bottom plate 12 using bolts 23, and each side plate emboss plate 26 is detachably attached to the left and right side plates 13 and 14 using bolts 27. Yes. Therefore, when the bottom plate embossing plate 22 and the side plate embossing plate 26 are worn, a new bottom plate embossing plate 22 and side plate embossing plate 26 are used instead of the worn bottom plate embossing plate 22 and side plate embossing plate 26. Can be easily attached to the bottom plate 12 and the left and right side plates 13 and 14. As described above, since the worn embossing plate 22 for the bottom plate and the embossing plate 26 for the side plate can be easily replaced, the effect of suppressing the adhesion of earth and sand to the excavation bucket 11 can be maintained for a long period of time. it can.

  In the above-described embodiment, the case where the bottom plate embossing plate 22 is attached to the bottom plate 12 using the bolts 23 and the side plate embossing plate 26 is attached to the left and right side plates 13 and 14 using the bolts 27 is illustrated. is doing. However, the present invention is not limited to this. For example, as in the first modification shown in FIG. 11, welding is performed by performing all-around welding between the outer peripheral edge portion of the bottom plate emboss plate 22 and the bottom plate 12. The welded portion 28 (only the left side plate 13 side is shown) may be formed by forming the portion 28 and performing full circumference welding between the side plate embossed plate 26 and the left and right side plates 13 and 14.

  In this case, since it is not necessary to arrange a fixing tool such as a bolt in the earth and sand container 15, the flow of earth and sand discharged from the earth and sand container 15 is not hindered by the fixing tool, and the earth and sand can be more quickly removed. Can be discharged.

  Moreover, in embodiment mentioned above, the case where the embossing board 22 for bottom boards is attached to the bottom board 12 so that attachment or detachment is possible using the volt | bolt 23 is illustrated. However, the present invention is not limited to this, and the bottom plate embossing plate 22 may be detachably attached to the bottom plate 12 using a rivet 29 as in the second modification shown in FIG. The same applies to the side plate embossed plate 26.

  Moreover, in embodiment mentioned above, while providing the baseplate embossing board 22 in the baseplate 12 which forms the earth and sand accommodating part 15 of the excavation bucket 11, the side board embossing board 26 was provided in the left and right side boards 13 and 14, respectively. The case is illustrated. However, the present invention is not limited to this. For example, the bottom plate emboss plate 22 may be provided only on the bottom plate 12, and the side plate emboss plate 26 may be provided only on the left and right side plates 13 and 14. .

It is a front view which shows the hydraulic shovel provided with the excavation bucket by embodiment of this invention. It is a perspective view which shows a digging bucket alone. It is a disassembled perspective view which shows the state which isolate | separated the embossing board for bottom boards and the embossing board for side boards from the excavation bucket. It is the enlarged view which looked at the excavation bucket from the opening side. It is sectional drawing which looked at the embossing board for side boards, etc. from the arrow VV direction in FIG. It is sectional drawing which looked at the embossing board for bottom boards etc. from the arrow VI-VI direction in FIG. It is the expanded sectional view which looked at the projection part of the embossing board for bottom boards from the arrow VII-VII direction in FIG. It is the expanded sectional view which looked at the projection part of the embossing board for bottom boards from the arrow VIII-VIII direction in FIG. It is sectional drawing which shows the state in which earth and sand accumulated thinly on the embossing board for bottom boards. It is sectional drawing which shows the state from which the water | moisture content was discharged | emitted from the earth and sand deposited on the embossing board for bottom boards. It is a perspective view which shows the 1st modification which attached the embossing board for bottom boards, and the embossing board for side boards to the excavation bucket by welding. It is sectional drawing which shows the 2nd modification which attached the embossing board for bottom boards with the rivet.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Excavation bucket 12 Bottom plate 12C, 13B, 14B Inner side surface 13 Left side plate 14 Right side plate 15 Sediment receiving part 16 Left side edge 17 Right side edge 19 Cutting edge 22 Embossed plate for bottom plate (embossed plate)
22A, 26A Projection 23, 27 Bolt 26 Embossed plate for side plate (embossed plate)
28 Welds 29 Rivet F Flow direction of earth and sand

Claims (3)

A concavely curved bottom plate, left and right side plates that are provided on both the left and right sides of the bottom plate to form a sand-and-sand container with the bottom plate, and left and right side edges that are provided on the opening side of the side plates; An inner surface of the bottom plate and / or an inner surface of the left and right side plates that form the earth and sand accommodating portion, and a cutting edge provided between the side edges and provided on the front end side of the bottom plate. In the excavation bucket provided with an embossed plate having a large number of protrusions ,
The protrusions of the front disappeared Nbosu plate is formed into an elliptical shape having a width direction and a longitudinal direction,
The embossing plate, bucket, characterized in that it has a configuration wherein you parallel to the flow direction of the sediment in the longitudinal direction is discharged to the outside from the sediment containing portion of the protrusions. The excavation bucket according to claim 1, wherein the embossing plate is attached to an inner surface of the bottom plate and / or an inner surface of the left and right side plates using any one of bolts, rivets, and welding. . The excavation bucket according to claim 1 or 2 , wherein the emboss plate is formed using any one of stainless steel, steel, and water-repellent resin material.

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