Skeleton Bucket

Abstract

In a skeleton bucket in which multiple vertical and horizontal members are assembled in a grid pattern, the present invention provides an assembly configuration that reduces the number of fixing points while preventing misalignment of the intersection positions of the vertical and horizontal members. [Solution] The skeleton bucket 4 consists of a first horizontal member 1 that is long enough to span across the left and right side plates 5, and a second horizontal member 2 that is long enough to be sandwiched between the side plates 5 and the vertical members 3 or the vertical members 3 themselves, with protrusions 21 projecting from the left and right end faces. The vertical members 3 have first connecting parts 31 and second connecting parts 32 arranged in the extending direction, and the side plates 5 have first connecting parts 51 and second connecting parts 52 at corresponding positions on the first connecting parts 31 and second connecting parts 32 of the vertical members 3, respectively. The ends of the first horizontal member 1, which penetrates all of the first connecting parts 31 of the multiple vertical members 3, are fixed to the first connecting parts 51 of the left and right side plates 5, and the second horizontal member 2, with its protrusions 21 fitted into the second connecting parts 52 and 32 of the side plates 5 and the vertical members 3, is interposed between the side plates 5 and the vertical members 3 or the vertical members 3 themselves.

Description

Technical Field

[0001] The present invention relates to a skeleton bucket in which a plurality of vertical members arranged between left and right side plates and a plurality of horizontal members intersecting the vertical members are assembled in a lattice pattern.

Background Art

[0002] A skeleton bucket for sorting lumps (stones, disassembled shells, etc.) from scooped earth and sand is configured by assembling a plurality of vertical members arranged between left and right side plates and a plurality of horizontal members intersecting the vertical members in a lattice pattern, as seen in, for example, Patent Document 1. The skeleton bucket disclosed in Patent Document 1 has a configuration in which the horizontal members are inserted into through-holes in the vertical members and side plates (Patent Document 1, [Claim 1]), and the through-holes in the side plates are hidden by pressing plates (Patent Document 1, [Claim 2]), and it is possible to select through-holes into which the horizontal members are inserted to switch to sieve surfaces with different mesh sizes (Patent Document 1,

[0012] ).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the skeleton bucket disclosed in Patent Document 1, for horizontal members other than the horizontal members that select through-holes to be inserted, both ends are fixed (for example, welded) to the side plates, and in addition, they are fixed (for example, welded) to the vertical members at the through-hole portions (Patent Document 1,

[0008] ). The fixing of the side plates or the vertical members and the horizontal members prevents the intersection positions of the vertical members and the horizontal members from shifting. If the intersection positions of the vertical members and the horizontal members shift, the size of the sorted lumps changes, which not only hinders the sorting operation, but in some cases also causes a decrease in the strength of the vertical members or the horizontal members, impairing the function of the skeleton bucket.

[0005] For these reasons, it is preferable to fix the side plates or vertical members to the horizontal members as many times as possible. However, increasing the number of fixations increases the manufacturing cost of the skeleton bucket and makes it difficult to automate the fixing work (e.g., welding) using robots. Therefore, we investigated a structure for a skeleton bucket in which multiple vertical members are arranged between the left and right side plates and multiple horizontal members intersecting the vertical members are assembled in a grid pattern, while reducing the number of fixations and preventing the intersection positions of the vertical and horizontal members from shifting. [Means for solving the problem]

[0006] The resulting design is a skeleton bucket in which multiple vertical members are arranged between the left and right side plates and multiple horizontal members intersecting the vertical members are assembled in a grid pattern. The horizontal members consist of a first horizontal member with a length that spans the left and right side plates, and a second horizontal member with a length that is sandwiched between the side plates and vertical members, and between the vertical members, and has protrusions that protrude from the left and right end faces. The vertical members have a first connecting part that penetrates the first vertical member and a second connecting part that fits the protrusions of the second member, arranged in the direction of the extension of the vertical member, and the side plates are, This skeleton bucket is characterized by having a first connecting portion for joining the ends of the first vertical member at a corresponding position on the first connecting portion of the vertical member, and a second connecting portion for fitting a protrusion of the second member at a corresponding position on the second connecting portion of the vertical member, the first horizontal member passing through all of the first connecting portions of the vertical members and fixing both ends to the first connecting portions of the left and right side plates, and the second horizontal member being interposed between the side plates and the vertical members or between the vertical members by fitting its protrusions into the second connecting portions of the side plates and the vertical members.

[0007] The first horizontal member is passed through the first joint of the vertical member, and both ends are fixed (e.g., welded) to the first joint of the side plate. The first joint of the vertical member is a through hole. The first joint of the side plate may be either a through hole or a recess, but it is preferable that it be a through hole through which the first horizontal member passes, because the end of the vertical member can be fixed (e.g., welded) from the outside of the side plate. The portion of the vertical member through which the first horizontal member passes (through hole) does not require fixing, but may be fixed if necessary.

[0008] The second horizontal member is interposed between the side plate and the vertical member, or between the vertical members themselves, and its protrusions fit into the second connecting portions of the side plate and the vertical member, respectively, thereby maintaining the spacing between the side plate and the vertical member, or between the vertical members themselves. The second connecting portion of the side plate may be either a through hole or a recess, but a recess that does not penetrate the side plate but is deep enough for the protrusions of the second horizontal member to fit into is preferred. The second connecting portion of the vertical member may also be either a through hole or a recess, but a through hole that is longer than or equal to the combined length of the protrusions of the second horizontal members that fit from the left and right is preferred. [Effects of the Invention]

[0009] In the skeleton bucket of the present invention, the second transverse member maintains the spacing between the side plates and vertical members, and between the vertical members themselves, so the first transverse member does not need to be fixed to the vertical members. The first transverse member is fixed only to the left and right side plates, maintaining the spacing between the side plates. Thus, the skeleton bucket of the present invention reduces manufacturing costs by requiring fewer fixings and facilitates the automation of fixing work (e.g., welding) using robots. If the second joint portion of the side plate is a recess that does not penetrate the side plate but is deep enough for the protrusion of the second transverse member to fit into, the protrusion of the second transverse member can be easily hidden from the outside and protected. Also, if the second joint portion of the vertical member is a through hole longer than the sum of the lengths of the protrusions of the second transverse members that fit from the left and right, the second joint portion, which is the part into which the protrusions fit, can be easily machined. [Brief explanation of the drawing]

[0010] [Figure 1] This is a perspective view showing an example of a skeleton bucket to which the present invention is applied. [Figure 2] This is a partially exploded perspective view showing the assembly relationship between the vertical members and the first and second horizontal members in the skeleton bucket of this example. [Figure 3] This is a schematic diagram illustrating the assembly relationship between the vertical members, the first horizontal member, and the second horizontal member in the skeleton bucket of this example. [Figure 4] This is a schematic diagram showing the assembly relationship between the vertical members, the first horizontal member, and the second horizontal member in the skeleton bucket of alternative example 1. [Figure 5]This is a schematic diagram showing the assembly relationship between the vertical members, the first horizontal member, and the second horizontal member in the skeleton bucket of alternative example 2. [Figure 6] This is a schematic diagram showing the assembly relationship between the vertical members, the first horizontal member, and the second horizontal member in the skeleton bucket of alternative example 3. [Modes for carrying out the invention]

[0011] The embodiments for carrying out the present invention will be described below with reference to the figures. The present invention is applied, for example, to the skeleton bucket 4 shown in Figures 1 and 2. The skeleton bucket 4 in this example (see Figure 1), in which a plurality of vertical members 3 arranged between the left and right side plates 5 and a plurality of horizontal members intersecting the vertical members are assembled in a grid pattern, looks almost the same as conventional ones, but is characterized in that the number of weld marks 511 that fix both ends of the first horizontal member 1 to the first joint 51 of the side plate 5 is fewer than in conventional ones.

[0012] In this example, the vertical member 3 is a metal plate bent into a semi-circular arc shape when viewed from the side, and has a first connecting portion 31 that penetrates the first vertical member 1 and a second connecting portion 32 that fits the protrusion 21 of the second member 2, arranged at equal intervals in the extending direction of the vertical member 3. The first connecting portion 31 is a through hole with an inner diameter equal to the outer diameter of the first horizontal member 1 that penetrates it. The second connecting portion 32 is a through hole with an inner diameter equal to the outer diameter of the protrusion 21 of the second horizontal member 2 that it fits. Since the first horizontal member 1 and the second horizontal member 2 have the same outer diameter, the second connecting portion 32, which is a through hole with an inner diameter equal to the outer diameter of the protrusion 21 which is smaller than the outer diameter of the second member 2, has a smaller inner diameter than the through hole of the first connecting portion 31.

[0013] The side plate 5 in this example is a crescent-shaped metal plate in side view, surrounded by an arc-shaped edge and a straight edge that follow the outer peripheral edge of the vertical member 3. It has a first connecting portion 51 through which the first vertical member 1 passes, and a second connecting portion 52 into which the protrusion 21 of the second member 2 is fitted, at positions corresponding to the first connecting portion 31 and the second connecting portion 32 of the vertical member 3, respectively. The first connecting portion 51 is a through hole with an inner diameter equal to the outer diameter of the first horizontal member 1 through which it passes. The second connecting portion 32 is a recess into which the protrusion 21 of the second horizontal member 2 is fitted, and is provided on the inner surface of the side plate 5.

[0014] The horizontal members in this example consist of a first horizontal member 1 that is long enough to span across the left and right side plates 5, and a second horizontal member 2 (see enlarged portion in Figure 2) that is long enough to be sandwiched between the side plates 5 and the vertical members 3, or between the vertical members 3 themselves, with protrusions 21 projecting from the left and right end faces. The first horizontal member 1 in this example is a long metal rod that is slightly shorter than the distance between the outer surfaces of the left and right side plates 5. The first horizontal member 1, which spans across the left and right side plates 5, is slightly too short at both ends to fill the first joint 51, thus creating a gap on the outer surface side of the first joint 51 of the side plate 5. The horizontal member 1 in this example is plug-welded (plug-welded) using the gap in the first joint 51, and is fixed to the side plate 5 without creating any protruding parts from the outer surface of the side plate 5.

[0015] In this example, the second horizontal member 2 is a short metal rod of a length that is sandwiched between the side plate 5 and the vertical members 3, or between the vertical members 3 themselves, with flat cylindrical protrusions 21 projecting from both ends. The second horizontal member 2 and the protrusions 21 are concentric. In this example, the protrusions 21 have a length slightly shorter than half the thickness of the vertical member 3. As a result, even when the protrusions 21 of the two opposing second horizontal members 2, which are sandwiching the vertical member 3, are fitted into the same second joint 32 from the left and right, a gap remains between the protrusions 21, allowing each to be stably fitted into the same second joint 32.

[0016] In this example, the skeleton bucket 4 has nine vertical members 3 arranged at equal intervals between the left and right side plates 5, corresponding to the spacing of the second horizontal members 2. Four first horizontal members 1 perpendicular to all the vertical members 3 and three rows of second horizontal members 2 are assembled in a grid pattern. Ten second horizontal members 2 are arranged in series in each row. The outer diameter of the second horizontal members 2 is equal to that of the first horizontal members 1, and the protrusions 21 are fitted into and hidden by the second connecting parts 52, 32 of the side plates 5 or the vertical members 3, so externally, it looks like a single member, just like the first horizontal members 1.

[0017] The skeleton bucket 4 is composed of a sieve surface formed by assembling the vertical members 3, the first horizontal member 1, and the second horizontal member 2 in a lattice pattern. The rear end sides of the vertical members 3 and the side plates 5 are connected to the connecting end portions 41, and the front end sides are connected to the cutting end portions 42, respectively. The connecting end portion 41 is a sheet metal block with a width that spans the side plate 5 and has connection brackets for the arms and links of construction machinery. The cutting end portion 42 is a metal plate with a width that spans the side plate 5 and is provided with a plurality of cutting claws. The connecting end portion 41 and the cutting end portion 42 function as structural members that integrate the front and rear ends of the side plate 5 and the vertical members 3.

[0018] As shown in Fig. 3, in the skeleton bucket 4 of this example, the first horizontal member 1 is arranged at the front and rear ends closest to the connecting end portion 41 (schematic representation of a rectangle) and the cutting end portion 42 (schematic representation of a rectangle). Four first horizontal members 1 and three rows of second members 2 (emphasized by cross-hatching in Fig. 3) are arranged alternately. The number of points fixed by plug welding (the weld marks 511 are shown in Fig. 3) is only eight points at both ends of the first horizontal member 1 with respect to the side plate 5. However, the side plate 5, the vertical members 3, and the vertical members 3 are maintained at intervals by the intervention of the second horizontal member 2. Thus, the skeleton bucket 4 of this example does not displace the side plate 5 and the vertical members 3 while reducing the number of fixings.

[0019] As shown in Fig. 4, in the skeleton bucket 4 of Another Example 1, similar to this example, while the first horizontal member 1 is arranged at the front and rear ends closest to the connecting end portion 41 (schematic representation of a rectangle) and the cutting end portion 42 (schematic representation of a rectangle), the second horizontal members 2 in two rows are arranged so as to be sandwiched by three first horizontal members 1. The number of points fixed by plug welding (the weld marks 511 are shown in Fig. 4) is only six points at both ends of the first horizontal member 1 with respect to the side plate 5. However, the side plate 5, the vertical members 3, and the vertical members 3 are maintained at intervals by the intervention of the second horizontal member 2. Thus, the skeleton bucket 4 of Another Example 1 further reduces the number of fixings while not displacing the side plate 5 and the vertical members 3.

[0020] As shown in Fig. 5, the skeleton bucket 4 of the second alternative example is different from this example in that the rows of the second horizontal members 2 are arranged at the front and rear ends closest to the connecting end portion 41 (schematic representation of a square) and the cutting end portion 42 (schematic representation of a square), and the three first horizontal members 1 and the four rows of second members 2 (cross-hatched and emphasized in Fig. 3) are arranged alternately. The number of fixings by plug welding (showing the weld marks 511 in Fig. 5) is only six places at both ends of the first horizontal member 1 with respect to the side plate 5. However, the side plate 5, the vertical members 3, and the vertical members 3 are spaced apart by the intervention of the second horizontal member 2. Thus, the skeleton bucket 4 of the second alternative example does not displace the side plate 5 or the vertical members 3 while further reducing the number of fixings.

[0021] As shown in Fig. 6, the skeleton bucket 4 of the third alternative example, similar to this example, while the first horizontal member 1 is arranged at the front and rear ends closest to the connecting end portion 41 (schematic representation of a square) and the cutting end portion 42 (schematic representation of a square), five rows of second horizontal members 2 are arranged between the front and rear first horizontal members 1. The number of fixings by plug welding (showing the weld marks 511 in Fig. 6) is only four places at both ends of the first horizontal member 1 with respect to the side plate 5. However, the side plate 5, the vertical members 3, and the vertical members 3 are spaced apart by the intervention of the second horizontal member 2. Thus, the skeleton bucket 4 of the sixth alternative example does not displace the side plate 5 or the vertical members 3 while further reducing the number of fixings.

Explanation of Signs

[0022] 1 First horizontal member 2 Second horizontal member 21 Protrusion 3 Vertical member 31 First coupling portion 32 Second coupling portion 4 Skeleton bucket 41 Connecting end portion 42 Cutting end portion 5 Side plate 51 First coupling portion 511 Weld mark 52 Second coupling portion

Claims

1. In a skeleton bucket in which multiple vertical members are arranged between the left and right side plates and multiple horizontal members intersecting the vertical members are assembled in a grid pattern, The horizontal members consist of a first horizontal member that is long enough to span across the left and right side panels, and a second horizontal member that is long enough to be sandwiched between the side panels and vertical members, or between vertical members, with protrusions extending from the left and right end faces. The vertical member has a first connecting portion that penetrates the first vertical member and a second connecting portion that fits into the protrusion of the second member, arranged in the direction of extension of the vertical member. The side plate has a first connecting portion for joining the end of the first vertical member at a position corresponding to the first connecting portion of the vertical member, and a second connecting portion for fitting the protrusion of the second member at a position corresponding to the second connecting portion of the vertical member. The first horizontal member is passed through all of the first joints of the vertical members, and both ends are fixed to the first joints of the left and right side plates. The second horizontal member is interposed between the side plate and the vertical member, or between the vertical members themselves, by fitting its protrusions into the second connecting portions of the side plate and the vertical member. A skeleton bucket characterized by the following.

2. The first joint portion of the side plate is a through hole that penetrates the first transverse member. The skeleton bucket according to claim 1.

3. The second joint of the side plate is a recess that does not penetrate the side plate, but is deep enough for the protrusion of the second transverse member to fit into. The skeleton bucket according to claim 1.

4. The second connecting portion of the vertical member is a through-hole that is longer than or equal to the sum of the lengths of the protrusions of the second horizontal member that fits in from the left and right. The skeleton bucket according to claim 1.

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