Replaceable edge body, replaceable edge body set, and work machine bucket

Abstract

To provide a replaceable edge body, a replaceable edge body set, and a work machine bucket that allow edge blades to be easily replaced.SOLUTION: Replaceable edge bodies 30d to 30f that can be attached and detached to a flat bottom plate 22 of a work machine bucket 10 comprise a main body plate portion 31 that is detachably fixed to an underside of the bottom plate 22 at a rear side opposite the front side that is an opening side of the work machine bucket 10, and an edge blade portion 32b that is formed at a rear side of the main body plate portion 31, protrudes rearward beyond a rear end of the bottom plate 22, and comes into contact with soil and sand that is a work object when working with the work machine bucket 10.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a replaceable edge body, a replaceable edge body set, and a work machine bucket. [Background technology]

[0002] For example, the work bucket described in Patent Document 1 has a replaceable blade support part welded to the bucket body, a replaceable blade-type excavation blade attached to this replaceable blade support part with a bolt as the blade on the front end side of the bottom of the bucket, and the blade on the rear end side of the bottom of the bucket is formed integrally with the bottom plate of the bucket body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Registered Utility Model No. 3106275 Summary of the Invention [Problem to be solved by the invention]

[0004] In the configuration described in Patent Document 1, the blade on the rear end side of the bottom of the bucket is integrally formed with the bottom plate of the bucket body, and when the blade on the rear end side wears out, the entire bottom plate of the bucket body needs to be replaced, which is time-consuming.

[0005] The present invention has been made in consideration of the above-mentioned circumstances, and aims to provide a replaceable edge body, a replaceable edge body set, and a work machine bucket that allow edge blades to be easily replaced. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the replaceable edge body according to a first aspect of the present invention is a replaceable edge body that can be attached and detached to the flat bottom plate of a work machine bucket, and is equipped with a first main body plate portion that is detachably fixed to the underside of the bottom plate on the rear side opposite the front side which is the opening side of the work machine bucket, and a first edge cutting portion that is formed on the rear side of the first main body plate portion, protrudes rearward beyond the rear end of the bottom plate, and comes into contact with a work object when working with the work machine bucket.

[0007] In order to achieve the above-mentioned object, the replaceable edge body set according to a second aspect of the present invention is a replaceable edge body set comprising a rear edge body and a front edge body, which are replaceable edge bodies, wherein the front edge body comprises a second main body plate portion that is removably fixed to the front side of the underside of the bottom plate, and a second edge cutting portion that is formed on the front side of the second main body plate portion, protrudes forward beyond the front end of the bottom plate, and comes into contact with the work object when working with the work machine bucket, and the rear edge body and the front edge body each have the same shape and are configured to be interchangeable with each other.

[0008] In order to achieve the above object, a work machine bucket according to a third aspect of the present invention is a work machine bucket comprising the replaceable edge body and a bucket body having the bottom plate to which the replaceable edge body is detachably fixed, wherein the bucket body is an integrally formed casting and is formed from a material that is softer and more elastic than the replaceable edge body. [Effects of the Invention]

[0009] According to the present invention, the edge blade can be easily replaced. [Brief explanation of the drawings]

[0010] [Figure 1] 1 is a perspective view of a work machine bucket according to one embodiment of the present invention; FIG. [Figure 2] 1 is an exploded perspective view of a work machine bucket according to an embodiment of the present invention. FIG. [Figure 3]FIG. 2 is a bottom view of a work machine bucket according to one embodiment of the present invention. [Figure 4] 1(a) and 1(b) are perspective views of a replaceable edge body according to one embodiment of the present invention. [Figure 5] FIG. 10 is a schematic diagram showing the degree of wear at the corner of the edge cutting edge according to one embodiment of the present invention. [Figure 6] 10(a) to 10(c) are plan views of a replaceable edge body according to a modified example of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0011] The replaceable edge body, replaceable edge body set, and work machine bucket according to one embodiment of the present invention will be described with reference to the drawings. The work machine bucket is an attachment that is attached to the arm of a work machine such as a backhoe, and is used, for example, exclusively for slope shaping or for both slope shaping and excavation.

[0012] As shown in FIGS. 1 and 2, the work machine bucket 10 includes a bucket body 20, a plurality of replaceable edge bodies 30a to 30f, and a plurality of fasteners 50. In the following description, the direction in which the storage recess 20a that stores the soil scooped up by the bucket body 20 opens is defined as the front direction, and the direction opposite to this front direction is defined as the rear direction. Furthermore, the up-down direction and the left-right direction are defined by the directions as seen by the operator when the storage recess 20a of the bucket body 20 faces the operator in the operator's seat.

[0013] The bucket body 20 is a casting that is integrally formed by casting. The bucket body 20 is made of a metal material (cast iron or cast steel) that is softer and more elastic than the replaceable edge bodies 30a to 30f. As shown in FIG. 1, the bucket body 20 includes side walls 21L and 21R, a bottom plate 22, a rear wall 25, and an inner wall portion .

[0014] The bottom plate 22 is formed on a flat plate, and specifically, has a rectangular plate shape that is long in the left-right direction and short in the front-rear direction. As shown in FIG. 2, the underside of the bottom plate 22 includes edge mounting surfaces 22b and 22f and a central surface 22c. The central surface 22c is located at the center of the underside of the bottom plate 22 in the front-to-rear direction, between the edge mounting surfaces 22b and 22f. The replaceable edge units 30a-30f are located on the edge mounting surfaces 22b and 22f, and are recessed from the central surface 22c by the thickness of the replaceable edge units 30a-30f. In other words, the edge mounting surfaces 22b and 22f are formed so that the underside of the bottom plate 22 is flush with the replaceable edge units 30a-30f when attached. The edge mounting surface 22f is formed forward of the central surface 22c of the bottom plate 22 and extends across the entire left-to-right area of ​​the underside of the bottom plate 22, extending to the front end of the underside of the bottom plate 22. The edge mounting surface 22b is formed on the rear side of the central surface 22c of the bottom plate 22, and is formed across the entire left-right area of ​​the lower surface of the bottom plate 22, extending to the rear end of the lower surface of the bottom plate 22. A plurality of holes 22h aligned in the left-right direction are formed in the bottom plate 22 within the edge mounting surfaces 22b, 22f. The holes 22h penetrate the bottom plate 22 in the thickness direction, and allow the screw shanks 50J of the fastener 50 to be inserted therethrough.

[0015] 1, the side walls 21L, 21R face each other, are located at both left and right end portions of the upper surface of the bottom plate 22, and are plate-shaped, extending along the front-rear and up-down directions and standing on the bottom plate 22. The side walls 21L, 21R are shaped so that their width in the front-rear direction decreases toward the upper side. The rear wall 25 is located at the rear end of the upper surface of the bottom plate 22, and is a plate-like member that is long in the left-right and up-down directions and stands upright on the bottom plate 22. The two inner wall portions 23 are located between the side walls 21L, 21R within the accommodation recess 20a, and are formed in a range that extends from the rear side of the bottom plate 22 to the rear wall 25 so as to be parallel to the side walls 21L, 21R.

[0016] 2 and 3, the edge bodies 30a to 30f are detachably fixed to both front and rear ends of the lower surface of the bottom plate 22. The edge bodies 30a to 30f have the same shape. The edge bodies 30a to 30f are formed in a rectangular plate shape (oblong plate shape) from a metal material that is harder than the bucket body 20. The edge bodies 30a to 30f are formed with high hardness by quenching.

[0017] As shown in FIGS. 4(a) and 4(b), the edge bodies 30a to 30f each include a main body plate portion 31 and edge blade portions 32a and 32b. The main body plate 31 has a rectangular plate shape. A plurality of recesses 31a are formed on one surface of the main body plate 31. The six recesses 31a are arranged such that three are aligned in the longitudinal direction of the main body plate 31 and two are aligned in the lateral direction of the main body plate 31. Of the three longitudinally aligned recesses 31a, the central recess 31a is longer in the longitudinal direction than the other recesses 31a. A plurality of (two) holes 31h are formed in the main body plate 31, penetrating the main body plate 31 in the thickness direction. The two holes 31h are aligned longitudinally between the recesses 31a. The holes 31h are in the positive direction when viewed from the thickness direction of the main body plate 31. Around the holes 31h on the other surface, the back surface of the main body plate 31, recesses 31i are formed, into which the heads of the screws of the fasteners 50 fit. The recesses 31i prevent the heads of the screws from protruding from the back surface of the main body plate 31, thereby preventing them from affecting the slope shaping. The surface of the main body plate portion 31 is in surface contact with the edge mounting surfaces 22b and 22f.

[0018] The edge cutting portions 32a, 32b are the portions that come into contact with earth and sand during slope shaping and excavation work. The edge cutting portions 32a, 32b are formed over the entire area of ​​both ends in the short direction of the main plate portion 31. The edge cutting portions 32a, 32b are formed so that their thickness decreases with increasing distance from the main plate portion 31 in the short direction. The back surfaces of the edge cutting portions 32a, 32b (see FIG. 4(b)) are flush with the back surface of the main plate portion 31, and the front surfaces of the edge cutting portions 32a, 32b (see FIG. 4(a)) are inclined so as to approach the back surface side as they increase in distance from the main plate portion 31 in the short direction.

[0019] The edge bodies 30a to 30f are formed symmetrically with respect to a plane of symmetry S (see FIG. 4(b)), which is a plane perpendicular to the short side direction of the edge bodies 30a to 30f. The widthwise length of the edge bodies 30a to 30f is longer than the front-rear length of the edge installation surfaces 22b, 22f by the widthwise length of the edge cutting portion 32a or 32b. As a result, as shown in Fig. 1, one of the two edge cutting portions 32a, 32b of each edge body 30a to 30f protrudes in the front-rear direction from the underside of the bottom plate 22.

[0020] As shown in FIG. 3, the front edge bodies 30a-30c are arranged side by side in the left-right direction on the edge installation surface 22f. The side surface 35a1 extending in the front-rear direction (short side direction) of the edge body 30a faces, with a gap, a first side surface 35b1 extending in the front-rear direction of the edge body 30b, but does not engage with it. The second side surface 35b2 extending in the front-rear direction of the edge body 30b faces, with a gap, a side surface 35c1 extending in the front-rear direction of the edge body 30c, but does not engage with it. The edge cutting portions 32a of the edge bodies 30a-30c are aligned in a row in the left-right direction from the front end of the underside of the bottom plate 22. The front edge cutting portions 32a are primarily used for shaping slopes and excavation.

[0021] The rear edge bodies 30d-30f are arranged adjacent to each other in the left-right direction on the edge installation surface 22b. The side surface 35d1 extending in the front-rear direction of the edge body 30d faces the first side surface 35e1 extending in the front-rear direction of the edge body 30e with a gap therebetween, but does not engage with it. The second side surface 35e2 extending in the front-rear direction of the edge body 30e faces the side surface 35f1 extending in the front-rear direction of the edge body 30f with a gap therebetween, but does not engage with it. The edge cutting portions 32b of the edge bodies 30d-30f are aligned in a row in the left-right direction from the rear end of the underside of the bottom plate 22. The rear edge cutting portions 32b are primarily used for shaping slopes.

[0022] The multiple fasteners 50 are used to fix the edge bodies 30a to 30f to the lower surface of the bottom plate 22, and are made up of screws and nuts. Here, a method for fixing the edge bodies 30a to 30f to the lower surface of the bottom plate 22 with the fasteners 50 will be described. First, as shown in FIG. 2, the edge bodies 30a-30f are placed on the edge mounting surfaces 22b, 22f on the underside of the bottom plate 22. This places the holes 31h of the edge bodies 30a-30f in communication with the holes 22h of the bottom plate 22 in the vertical direction, and the shank 50J of the screw is passed through this communicating hole from the underside of the bottom plate 22. Then, as shown in FIG. 1, the head 50H of the screw is rotated with a tool so that the tip of the shank 50J exposed on the upper surface of the bottom plate 22 threads into the nut 50N. This secures the edge bodies 30a-30f to the bottom plate 22. To remove the edge bodies 30a-30f from the bottom plate 22, simply rotate the head 50H in the opposite direction. In other words, the edge bodies 30a-30f are detachable from the bottom plate 22, and the positions of the edge bodies 30a-30f can be interchanged.

[0023] Next, a method of using the work machine bucket 10 will be described. When work is performed using the front and rear cutting edges 32a, 32b protruding from the bottom plate 22, the four left and right corners C1 to C4 (see FIG. 3) are worn down before the tip surfaces of the other cutting edges 32a, 32b. Of the four corners C1 to C4, the front corners C1, C2 generally wear down more than the rear corners C3, C4. This is because excavation must be performed at the front and is frequently used. Furthermore, even among the front corners C1, C2, the left front corner C2 wears down more. The left front corner C2 is the corner closest to the operator and is the reference position for first contacting the target (excavated material), so it is prone to wear. As described above, the amount of wear varies depending on the position of the cutting edges 32a, 32b. Even in this case, in this embodiment, the frequency of replacing the edge bodies with new ones can be reduced by rotating the edge bodies 30a-30f by changing their positions and by changing the orientation of the edge bodies 30a-30f. As for the above rotation, for example, if corner C2 is worn, edge body 30c may be replaced with one of rear edge bodies 30d to 30f which are less worn, or it may be replaced with front edge body 30a or 30b which are relatively less worn. When changing the orientation of the edge body 30c, the edge body 30c is first removed from the bottom plate 22. Then, the edge body 30c is turned over so that the positional relationship between the edge blade portions 32a and 32b of the edge body 30a is reversed, and the edge body 30c is fixed to the bottom plate 22 again. The rotation and the change of orientation may be performed simultaneously. As a result, work can be done efficiently without the corners being worn down.

[0024] Incidentally, a work machine may have the function of acquiring the reference position (zero position) when the front end of the edge body 30a to 30c of the work machine bucket 10 comes into contact with the excavation reference surface, and automatically excavating using the acquired zero position as a reference. Here, as shown in Figure 5, assume that the corner C2 of the cutting edge portion 32a of the edge body 30c is worn by a predetermined amount ΔL more than the cutting edge portions 32a of the other front edge bodies 30a, 30b. In this case, the excavation amount will be less than if the corner C2 were not worn. However, in the above function, even though the corner C2 is worn, the center cutting edge portion 32a in the left-right direction contacts the excavation reference plane K. This position becomes the zero position, and the wear of the corner C2 is not taken into account, making it difficult to perform highly accurate excavation. In this regard, in this embodiment, the rotation and change of orientation described above make it easier to achieve a state in which the corner C2 is less worn, and a work machine having the above functions can perform work with high precision.

[0025] (effect) According to the embodiment described above, the following effects are achieved. (1) The replaceable edge bodies 30d to 30f that can be attached and detached to the flat bottom plate 22 of the work machine bucket 10 include a main body plate portion 31, which is an example of a first main body plate portion, that is detachably fixed to the underside of the bottom plate 22 on the rear side opposite the front side, which is the opening side of the work machine bucket 10, and edge blade portions 32a, 32b, which are an example of a first edge blade portion, that are formed on the rear side of the main body plate portion 31, protrude rearward beyond the rear end of the bottom plate 22, and come into contact with the soil or sand that is the work object when working with the work machine bucket 10. According to this configuration, when the replaceable edge bodies 30d-30f on the rear end side of the bottom plate 22 of the work machine bucket 10 become worn, it is sufficient to replace the replaceable edge bodies 30d-30f. Therefore, it is not necessary to replace the entire bottom plate 22, and it is possible to easily replace the edge cutting portions 32a, 32b on the rear end side of the bottom plate 22. In this way, because it is only necessary to replace the replaceable edge bodies 30d-30f, it is possible to reduce the time and cost required to replace the entire bottom plate 22.

[0026] (2) The replaceable edge body set includes replaceable edge bodies 30d-30f, which are an example of a rear edge body, and replaceable edge bodies 30a-30c, which are an example of a front edge body. Each of the replaceable edge bodies 30a-30c includes a main body plate portion 31, which is an example of a second main body plate portion, that is detachably fixed to the front side of the underside of the bottom plate 22, and edge cutting portions 32a, 32b, which are an example of a second edge cutting portion, that are formed on the front side of the main body plate portion 31, protrude forward beyond the front end of the bottom plate 22, and come into contact with the earth and sand that is the work object when working with the work machine bucket 10. The replaceable edge bodies 30d-30f and the replaceable edge bodies 30a-30c each have the same shape and are configured to be interchangeable with each other. This configuration allows for the replacement of one of the replaceable edge bodies 30a-30c with a relatively less worn replaceable edge body 30d-30f, thereby preventing significant wear of the cutting edges 32a, 32b. In other words, the rear replaceable edge bodies 30d-30f function not only for shaping slopes but also as spares in case the front replaceable edge bodies 30a-30c wear. This reduces the frequency of replacement and reduces costs.

[0027] (3) The multiple replaceable edge bodies 30d-30f each have the same shape and are lined up along the rear end of the bottom plate 22 with their side surfaces 35d1, 35e1, 35e2, and 35f1 extending in the front-to-rear direction (short side direction) facing each other without fitting together. The multiple replaceable edge bodies 30a-30c each have the same shape and are lined up along the front end of the bottom plate 22 with their side surfaces 35a1, 35b1, 35b2, and 35c1 extending in the front-to-rear direction facing each other without fitting together. According to this configuration, by replacing the edge body having the corners C1 to C4 with the most wear among the replaceable edge bodies 30a to 30c with other edge bodies, it is possible to avoid a state in which some of the edge cutting portions 32a, 32b are heavily worn without having to replace them with new replaceable edge bodies.

[0028] (4) The edge cutting portions 32a, 32b of the replaceable edge bodies 30d-30f and the replaceable edge bodies 30a-30c are formed on both the front and rear sides of the main body plate portion 31. By inverting the replaceable edge bodies 30a-30f in the front-to-rear direction, either one of the edge cutting portions 32a, 32b on both sides can be selectively configured to protrude from the bottom plate 22. According to this configuration, the edge cutting portions 32a, 32b are formed on both the front and rear sides of each replaceable edge body 30d to 30f. Therefore, for example, if the edge cutting portion 32a becomes worn, the edge cutting portion 32b can be used by changing the front-to-back orientation of the replaceable edge body 30d to 30f.

[0029] (5) The work machine bucket 10 includes replaceable edge bodies 30a-30f and a bucket body 20 having a bottom plate 22 to which the replaceable edge bodies 30a-30f are removably fixed. The bucket body 20 is an integrally formed casting, and is made of a material that is softer and more elastic than the replaceable edge bodies 30a-30f. With this configuration, the bucket body 20 is easily deformed and not easily damaged when force is applied. On the other hand, the replaceable edge bodies 30a-30f are hard and therefore have high workability, and even if the replaceable edge bodies 30a-30f are damaged, they can be replaced, so repairs require less effort than if the bucket body 20 were damaged. Furthermore, the bucket body 20 is manufactured by casting, and does not involve welding or cutting, so it can be manufactured easily. If the bucket body 20 is made of a casting, there is no weld bead, so that stress concentration on the weld bead can be avoided.

[0030] (6) The underside of the bottom plate 22 includes a central surface 22c located in the center in the front-to-rear direction, an edge mounting surface 22f formed in front of the central surface 22c, and an edge mounting surface 22b formed behind the central surface 22c. The edge mounting surfaces 22b and 22f are recessed from the central surface 22c by the thickness of the replaceable edge units 30a-30f. As a result, the back surfaces of the replaceable edge units 30a-30f are formed flush with the central surface 22c. With this configuration, the lower surface of the bottom plate 22 becomes flush with the replaceable edge bodies 30a to 30f attached, and a smooth slope can be formed when the ground is compacted (rolled) during slope shaping.

[0031] (7) The replaceable edge bodies 30a to 30f are removably fixed to the bottom plate 22 by fasteners 50, which are screw fasteners that can be attached and detached with a tool. According to this configuration, the fastener 50 allows the replaceable edge body to be smoothly replaced (including rotation, position change, and orientation change) without the need for welding or cutting work.

[0032] The present invention is not limited to the above-described embodiments and drawings, and modifications (including the omission of components) can be made as appropriate within the scope of the present invention.

[0033] (Variation) In the above embodiment, the shapes of the edge blades 32a and 32b can be changed as appropriate. For example, as shown in FIG. 6(a), the replaceable edge body 130 may have an edge cutting portion 132a whose tip end surface is formed in a rectangular wave shape. Furthermore, for example, as shown in FIG. 6(b), the replaceable edge body 230 may have an edge cutting portion 232a formed with a fork-shaped tip surface. Furthermore, for example, as shown in FIG. 6(c), the replaceable edge body 330 may have an edge cutting portion 332a having a sawtooth-shaped tip surface. Furthermore, the replaceable edge body may have edge cutting portions with different shapes at its front and rear ends.

[0034] In the above embodiment, the inner wall portion 23 may be omitted. In the above embodiment, the front and back surfaces of the edge bodies 30a to 30f are asymmetrical, but the front and back surfaces may also be formed symmetrically. In the above embodiment, either one of the edge blade portions 32a and 32b may be omitted. In the above embodiment, the edge bodies 30a to 30c and the edge bodies 30d to 30f are arranged in threes in the left-right direction, but the number of edge bodies arranged in the left-right direction may be one, two, or four or more. In the above embodiment, the edge mounting surfaces 22b and 22f may be omitted, and the lower surface of the bottom plate 22 may be formed as a flat surface. In the above embodiment, the front edge bodies 30a to 30c of the edge bodies 30a to 30f may be omitted. In the above embodiment, the rear edge bodies 30d to 30f among the edge bodies 30a to 30f may be omitted. In the above embodiment, the edge bodies 30a to 30f aligned in the left-right direction may be fitted together. In the above embodiment, the bucket body 20 may be formed by a can manufacturing process involving welding or cutting.

[0035] The above-described embodiment discloses, for example, the technical ideas described in the following Supplementary Notes 1 and 2. Note that Supplementary Notes 1 and 2 should not be construed as limiting the present invention in any way. (Appendix 1) A replaceable edge body set including a plurality of replaceable front edge bodies that are detachable from a flat bottom plate of a work machine bucket, The replaceable leading edge body is a main body plate portion detachably fixed to a front side, which is an opening side of the work machine bucket, on a lower surface of the bottom plate; an edge cutting portion formed on the front side of the main body plate portion, protruding forward beyond the front end of the bottom plate, and coming into contact with a work object when working with the work machine bucket, The plurality of front edge bodies each have the same shape, are arranged along the front end of the bottom plate, and are configured to be interchangeable with each other. Interchangeable edge body set. The configuration described in Patent Document 1 requires replacement with a new blade, but according to Supplementary Note 1, it is only necessary to change the positions of the multiple edge bodies attached to the work machine bucket.

[0036] (Appendix 2) A replaceable edge body that can be attached to and detached from a flat bottom plate of a work machine bucket, a main body plate portion detachably fixed to the lower surface of the bottom plate; two edge blades formed on both the front and rear sides of the main body plate portion, When the replaceable edge body is inverted in the front-to-rear direction, one of the two edge cutting portions selectively protrudes from the bottom plate in the front-to-rear direction and comes into contact with a work object during work with the work machine bucket. Interchangeable edge body. In the configuration described in Patent Document 1, it is necessary to replace the blade with a new one, but according to Supplementary Note 2, it is sufficient to simply change the orientation of the edge body. [Explanation of symbols]

[0037] 10...work machine bucket, 20...bucket body, 20a...accommodation recess, 21L, 21R...side wall, 22...bottom plate, 22b, 22f...edge installation surface, 22c...center surface, 22h, 31h...hole, 23...inner wall portion, 25...rear wall, 30a to 30f, 130, 230, 330...replaceable edge body, 31...main body plate portion, 31a, 31i...recess, 32a, 32b, 132a, 232a, 332a...edge cutting portion, 35a1, 35b1, 35b2, 35c1, 35d1, 35e1, 35e2, 35f1...side surface, 50...fastener, 50H...head portion, 50J...shank portion, 50N...nut, C1 to C4...corner portion, K...excavation reference surface

Claims

1. A replaceable edge body that can be attached to and detached from a flat bottom plate of a work machine bucket, a first main body plate portion detachably fixed to a rear side of the lower surface of the bottom plate opposite to a front side which is an opening side of the work machine bucket; a first edge cutting portion formed on the rear side of the first main body plate portion, protruding rearward beyond the rear end of the bottom plate, and coming into contact with a work object when working with the work machine bucket, Interchangeable edge body.

2. A replaceable edge body set comprising a rear edge body that is the replaceable edge body of claim 1 and a front edge body, The front edge body is a second main body plate portion detachably fixed to a front side of a lower surface of the bottom plate; a second edge cutting portion formed on the front side of the second main body plate portion, protruding forward beyond the front end of the bottom plate, and coming into contact with a work object during work with the work machine bucket, The rear edge body and the front edge body have the same shape and are configured so that their positions can be interchanged with each other. Interchangeable edge body set.

3. the rear edge bodies each have the same shape and are arranged along the rear end of the bottom plate with their side surfaces extending in the front-rear direction facing each other without being fitted together; The plurality of front edge bodies each have the same shape and are arranged along the front end of the bottom plate with their side surfaces extending in the front-rear direction facing each other without being fitted together. The replaceable edge body set according to claim 2.

4. The first edge blade portion of the rear edge body is formed on both the front and rear sides of the first main body plate portion, The rear edge body is configured to be inverted in the front-rear direction, so that either one of the front and rear first edge blade portions selectively protrudes rearward from the bottom plate, The second edge blade portion of the front edge body is formed on both the front side and the rear side of the second main body plate portion, The front edge body is configured to be inverted in the front-rear direction, so that either one of the front and rear second edge blade portions selectively protrudes forward from the bottom plate. The replaceable edge body set according to claim 2.

5. A work machine bucket comprising: the replaceable edge body according to claim 1; and a bucket body having the bottom plate to which the replaceable edge body is detachably fixed, The bucket body is an integrally formed casting, and is formed of a material that is softer and more elastic than the replaceable edge body. Work machine bucket.

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