JP2020011761A - Workpiece conveyance tool - Google Patents

Abstract

To provide a workpiece conveyance tool in which a sheet covering a workpiece is difficult to break.SOLUTION: A workpiece conveyance tool 10 includes a fitting part 30 fitted from above a workpiece 90 extending substantially horizontally, and a sheet 80 is laid on the fitting part 30 and pushed by the workpiece 90. The fitting part 30 includes: a first positioning part 46 facing end surfaces 91T and 92T of the workpiece 90; and first and second end positioning parts 31 and 32 for positioning an end of the workpiece 90 from three sides by a pair of second positioning parts 42 and 42 sandwiching the end of the workpiece 90 from a side. Then, a part of the first and second end positioning parts 31 and 32 facing the end surfaces 91T and 92T of the workpiece 90 is partially depressed, and the first and second relief grooves 43 and 47 for partially receiving the sheet 80 are formed.SELECTED DRAWING: Figure 10

Description

  The present disclosure relates to a work carrier having a fitting portion into which a work is fitted from above.

  2. Description of the Related Art Conventionally, as this type of work carrier, there is known one in which a sheet is laid on a fitting portion and pushed into the fitting portion by a work (for example, see Patent Document 1).

JP-A-2018-12527 (FIGS. 4 and 5)

  However, in the above-described conventional work transfer device, the load from the work may concentrate on a part of the sheet and the sheet may be broken, and there is a need for the development of a work transfer device that does not easily break the sheet.

  The invention according to claim 1, which has been made to solve the above-mentioned problem, is a work carrier provided with a fitting portion that extends substantially horizontally and is fitted from above with a work covered with a sheet from below. An end portion for positioning the end portion of the work from three directions by a first positioning portion facing the end surface of the work and a pair of second positioning portions sandwiching the end portion of the work from the side. A work transporting tool provided with a positioning part, wherein a first relief part for partially receiving the sheet is formed by depressing or removing a part of the first positioning part.

  According to a second aspect of the present invention, an edge portion of the second positioning portion on the side of the first positioning portion is depressed or removed to form a second relief portion for partially receiving the sheet. The work transfer tool according to claim 1.

  According to a third aspect of the present invention, the bottom surface of the end positioning portion is curved downward or partially depressed to form a third relief portion for partially receiving the sheet. 2. The work carrier according to item 2.

  According to a fourth aspect of the present invention, there is provided the work carrier according to any one of the first to third aspects, wherein an upper end of the first relief portion is opened on an upper surface of the fitting portion.

  The invention according to claim 5 is such that a plurality of partition areas in which a plurality of the fitting portions are arranged side by side at a constant pitch are provided vertically and a plurality, and a bank portion is formed along a boundary line between the adjacent partition areas. A plurality of first through-grooves penetrating in the bank portion in the longitudinally-arranged direction and having one end narrowed stepwise from the other end, and the other end narrowed stepwise from one end. And a plurality of second through-grooves are alternately arranged at a half pitch of the constant pitch, and the first and second through-grooves have a stepped portion between a wide portion and a narrow portion. A first positioning portion is formed, a pair of second positioning portions is formed by a pair of opposed portions in the wide portion, and the first relief portion is formed between the narrow portions. A work carrier according to any one of claims 1 to 4.

  According to a sixth aspect of the present invention, the entire work carrier has a box-shaped container structure having an open top surface, has a side wall at an outer edge, and a groove is provided at a side projection protruding from an inner surface of the side wall. The pair of second positioning portions are formed by the pair of opposed portions, and the first relief portion is formed by depressing an inner surface of the side wall at one end of the groove portion. A work carrier according to claim 5.

  In the work carrier according to the first aspect, the first positioning portion faces the end surface of the work that extends substantially horizontally, and the pair of second positioning portions sandwiches the end portion of the work from the side, so that the workpiece can be moved. The ends are positioned from three sides. Then, a part of the first positioning part is depressed or removed to form a first relief part, in which a part of the sheet is loosely received. It is easier to move between. Thereby, the load of the sheet pressed by the corner of the end face of the work is reduced, and the sheet is hardly broken.

  According to the second aspect of the present invention, a part of the sheet is loosely received by the second relief portion formed at the edge of the second positioning portion on the side of the first positioning portion. It becomes easy to move between the work and the inner surface of the fitting portion, the load on the sheet is reduced, and the sheet is less likely to break.

  According to the third aspect of the present invention, since a part of the sheet is loosely received by the third relief portion below the work, the load applied to the sheet is suppressed, and the sheet is not easily broken. In addition, since the first relief portion and the third relief portion communicate with each other, the sheet easily moves between them, and the load on the sheet is reduced.

  Since the upper end of the first relief portion of the work carrier according to the fourth aspect is open at the upper surface of the fitting portion, the sheet can be pulled out upward from the opening and can be freely handled, thereby reducing the load on the sheet. Be relaxed.

  In the work carrier according to the fifth aspect, the edge positioning portions of the divided areas are alternately formed on the bank partitioning between the adjacent divided areas, so that the work carrier can be made compact.

  In the work carrier according to the sixth aspect, the whole has a box-shaped container structure, and the end positioning portion is integrally formed on the side wall of the box-shaped container structure. can do.

Top side perspective view of the work carrier of the first embodiment Lower side perspective view of the work carrier Work perspective view Top view of work carrier Perspective view of the work carrier in the stacking state Perspective view of the work carrier in the nesting state Side sectional view of the work carrier in the stacking state Perspective view of a work carrier that accommodates a work with a sheet laid Partially enlarged plan view of the first end positioning unit Partially enlarged perspective view of a first end positioning unit. Partially enlarged plan view of the second end positioning unit Partially enlarged perspective view of the second end positioning unit. Partly enlarged plan view of the bank Partly enlarged perspective view of the bank Partial sectional side view of the work carrier Partial sectional side view of the work carrier Perspective view of a work carrier according to a second embodiment. Top view of work carrier Partial enlarged perspective view of the end positioning unit Lower side perspective view of the work carrier in the stacking state

[First Embodiment]
Hereinafter, a first embodiment of the work carrier 10 shown in FIGS. 1 to 16 will be described. As shown in FIG. 1, the entire work carrier 10 has a box-shaped structure having an open upper surface, and a pair of side walls 11, 11 opposed in the first horizontal direction H1, and opposed in a second horizontal direction H2 orthogonal thereto. And a pair of side walls 12, 12. The planar shape of the work carrier 10 is a rectangle in which the first horizontal direction H1 is longer than the second horizontal direction H2.

  A flange 13 projects laterally from the entire upper edges of the side walls 11 and 12. An arrow-shaped mark 13M for confirming the direction of the work carrier 10 is provided on the upper surface of a portion of the flange 13 projecting from the long side wall 12. In addition, chamfered surfaces 13C are formed at both corners of the flange 13 on the opposite side to the side of the mark 13M pointed by the arrow. In the flange 13 which protrudes from the side wall 11 on the shorter side, a cutout 13A is formed by cutting off the outer edge of the central portion thereof.

  In the following description, the side walls 11 will be referred to as "short side walls 11" and the side walls 12 will be referred to as "long side walls 12" in order to easily distinguish the side walls 11 and 12. When distinguishing one end side and the other end side in the first horizontal direction H1, the side indicated by the arrow of the mark 13M is “the front side in the first horizontal direction H1”, and the opposite side is “the first horizontal direction H1”. Behind direction H1 ".

  The inside of the work carrier 10 is divided into a first section area R1 on the front side of the bank section 20 and a second section area R2 on the rear side by the bank section 20 provided at the center position in the first horizontal direction H1. The bank portion 20 protrudes from the bottom wall 14 of the work carrier 10 and extends in the second horizontal direction H2 to communicate between the pair of long side walls 12. In addition, first and second support bank portions 21 and 22 lower than the bank portion 20 are provided at a front position and a rear position in the first horizontal direction H1 of the first and second partition areas R1 and R2. It is provided and extends in parallel with the bank portion 20. Further, the first and second support bank portions 21 and 22 are formed with first and second intermediate support portions 34 and 35 in an arc groove shape at a constant pitch in the second horizontal direction H2. Then, as shown in FIG. 4, a plurality of works 90 extending in the first horizontal direction H1 are arranged on the first and second intermediate support portions 34 and 35 of the first and second partition areas R1 and R2. Is done.

  As shown in FIG. 3, the workpiece 90 is, for example, a metal part having a circular cross section, and has a first end 91 having the smallest outer diameter at one end, and an outer diameter at the other end which is smaller than the first end 91. It has a large second end 92. Further, a flange 93 projects laterally from the axially intermediate portion of the work 90, and has a first intermediate shaft portion 94 having a larger outer diameter than the second end portion 92 on the first end 91 side of the flange 93, On the opposite side, a second intermediate shaft portion 95 having a larger outer diameter than the first intermediate shaft portion 94 is provided.

  As shown in FIG. 4, the first and second partition areas R1 and R2 are provided with a plurality of fitting portions 30 that receive and position a plurality of works 90. Each fitting portion 30 includes a pair of the first and second intermediate support portions 34 and 35 arranged in the first horizontal direction H <b> 1 and a first and second intermediate support portion in the short side wall 11 and the bank portion 20. A first end positioning unit 31 and a second end positioning unit 32 are provided on an extension line connecting the pair of 34 and 35. Then, the first end 91 of the work 90 fits into the first end positioning part 31, while the second end 92 fits into the second end positioning part 32, and the first intermediate shaft part 94. Are supported by the first intermediate support portion 34 from below, and the second intermediate shaft portion 95 is supported by the second intermediate support portion 35 from below.

  In each of the fitting portions 30 of the first and second partition areas R1 and R2, the first end 91 of the work 90 is arranged on the front side in the first horizontal direction H1, and the second end 92 is arranged on the rear side. Position. For this purpose, a plurality of first end positioning portions 31 are formed at a constant pitch on the front short side wall 11 in the first horizontal direction H1, while a plurality of first end positioning portions 31 are formed on the rear short side wall 11 in the first horizontal direction H1. The plurality of second end positioning portions 32 are formed at a constant pitch. Then, on the bank portion 20, the first end positioning portions 31 of the second division area R2 and the second end positioning portions 32 of the first division area R1 are alternately formed at a half pitch of a fixed pitch. Have been. The structures of the first and second end positioning portions 31 and 32 will be described later in detail.

  As shown in FIG. 5, the work carrier 10 of the present embodiment, when stacking, depends on whether or not the upper work carrier 10 is turned 180 degrees with respect to the lower work carrier 10, as shown in FIG. 5. A stacking state in which the upper work carrier 10 is not received by the lower work carrier 10 and a nesting in which the upper work carrier 10 is received by the lower work carrier 10 as shown in FIG. State and can be changed to. Such a box-shaped work carrier that can be changed between the stacking state and the nesting state is generally called an S / N container. Hereinafter, a configuration in which the work carrier 10 can be changed between the stacking state and the nesting state will be briefly described.

  As shown in FIG. 1, the pair of long side walls 12, 12 are provided with side surface irregularities 18 </ b> F at both ends and a central part thereof. The side surface unevenness portion 18F has the inner side surface concave portion 18 and the inner side surface protrusion portion 19 adjacent to each other, and the inner side surface concave portion 18 is located on the front side of the inner side surface protrusion portion 19 in the first horizontal direction H1. In addition, the inner surface concave portion 18 is formed by depressing the inner surface of the long side wall 12 into a square groove shape, and extends over the entire vertical direction of the long side wall 12. On the other hand, the inner side projection 19 protrudes stepwise from the inner side surface of the long side wall 12 and has a pedestal structure extending from a lower end of the long side wall 12 to a position closer to the upper end. Then, while the width of the inner surface concave portion 18 gradually decreases as going downward, the width of the inner surface projecting portion 19 gradually narrows as going upward. In addition, an upper surface protrusion 19 </ b> T protrudes from the inner edge of the upper surface of the inner surface protrusion 19.

  As shown in FIG. 2, on the outer surface of the long side wall 12, the back side of the inner side recess 18 forms an outer side protrusion 17 that protrudes laterally, while the back side of the inner side surface protrusion 19 is formed by the long side wall. The outer surface 12 has an outer surface recess 16 which is depressed from the outer surface. In addition, a lower end cylindrical portion 17 </ b> A having a rectangular cylindrical shape protrudes from the lower surface of the outer side projection 17. Further, a contact rib 16 </ b> T is formed so as to connect between the upper portion of the inner surface of the outer surface recess 16 and the lower surface of the flange 13.

  As shown in FIG. 1, side projections 40 of first and second end positioning portions 31 and 32, which will be described in detail later, project from the inner surfaces of the pair of short side walls 11 and 11 in a stepped manner. I have. The side protruding portion 40 is formed from the lower end of the short side wall 11 to a position near the upper end, and the side protruding portion 40 is divided at a plurality of portions in the second horizontal direction H2 to form the inner side recess 18 described above. A part of the side projection 40 projects further toward the bank 20 at a plurality of locations in the second horizontal direction H2 to form the above-described inner side projection 19. Then, the inner surface concave portion 18 of the one short side wall 11 and the inner surface protrusion 19 of the other short side wall 11 face the first horizontal direction H1, and the inner surface protrusion 19 of the one short side wall 11 and the other short side. The inner surface concave portion 18 of the side wall 11 is disposed so as to face the first horizontal direction H1. The plurality of inner side protrusions 19 of the short side wall 11 include those having the upper surface protrusion 19T and those not having the upper surface protrusion 19T.

  As shown in FIG. 2, the outer side protrusion 17 and the outer side recess 16 are also formed on the short side wall 11 behind the inner side recess 18 and the inner side protrusion 19. In the short side wall 11, the contact rib 16 </ b> T is disposed at a position shifted from the outer side recess 16.

  With the above configuration, as shown in FIG. 5, when the upper work transfer tool 10 is turned 180 degrees and stacked on the lower work transfer tool 10, the inner surface protrusion of the lower work transfer tool 10 is formed. The outer surface projecting portion 17 of the upper work carrier 10 is placed on the upper surface 19, and the stacking state is established. At this time, the lower end cylindrical portion 17A of the outer surface projecting portion 17 and the upper surface projecting portion 19T of the inner surface projecting portion 19 are engaged with each other, thereby preventing the upper and lower workpiece carriers 10, 10 from laterally shifting.

  On the other hand, as shown in FIG. 6, when the upper and lower work carriers 10 are stacked in the same direction, the outer surface of the upper work carrier 10 is inserted into the inner surface recess 18 of the lower work carrier 10. The protrusion 17 is received, and the inner surface protrusion 19 (see FIG. 2) of the lower work carrier 10 is received in the outer surface concave portion 16 (see FIG. 1) of the upper work carrier 10, and furthermore, The lower edge of the contact rib 16T of the upper work carrier 10 comes into contact with the flange 13 of the lower work carrier 10 to enter the nesting state.

  The back side of the above-described bank portion 20 and the first and second support bank portions 21 and 22 (see FIG. 1) are hollow portions 20S, 21S and 22S (see FIG. 2). The bank portion 20 and the like of the lower work carrier 10 are received in the cavity 20S and the like of the upper work carrier 10. A flange interference avoiding groove 14A (see FIG. 2) extending in the first horizontal direction H1 is formed in the lower surface of the work carrier 10 between the first and second support banks 21, 22. . The flange interference avoiding groove 14A is formed by bulging a part of the bottom wall 14 of the work carrier 10 upward in a barrel shape. Then, as shown in FIG. 7, when the work carriers 10 containing the work 90 are stacked in a stacking state, the upper part of the flange 93 of the work 90 of the lower work carrier 10 is moved to the upper side. Is received in the flange interference avoiding groove 14A of the work carrier 10 of FIG.

  As shown in FIG. 8, the work carrier 10 of this embodiment is used in such a manner that a sheet 80 is laid on the entire upper surface and a plurality of works 90 are received by the fitting portion 30 from above. Sometimes. On the other hand, the first and second end positioning portions 31 and 32 of the fitting portion 30 have a structure suitable for such a usage. Hereinafter, the first and second end positioning portions 31 and 32 will be described in detail.

  As shown in FIGS. 9 and 10A, the first end positioning portion 31 of the short side wall 11 includes the above-described side projection 40 and a groove 49 penetrating the side projection 40 in the first horizontal direction H1. And a groove end surface 45 that is a part of the inner surface of the short side wall 11 that closes one end of the groove 49. Then, the first end 91 of the work 90 is received in the groove 49, and the end surface 91 </ b> T of the first end 91 faces the groove end surface 45. At the center in the width direction of the groove end surface 45, a first escape groove 47 extending in the vertical direction is formed to be depressed, and portions of the groove end surface 45 left on both sides of the first escape groove 47 are first positioned. Parts 46, 46.

  Further, the first relief groove 47 extends vertically from the upper end of the flange 13 to the groove bottom surface 48 of the groove portion 49, and its groove width is slightly smaller than the pair of opposing surfaces 41, 41. It gradually narrows down. Further, the cross section of the first relief groove 47 has an arc shape, and corners between both side edges of the first relief groove 47 and the first positioning portion 46 are chamfered in an arc shape.

  The pair of opposing surfaces 41 in the groove portion 49 are inclined so as to approach each other downward. A second escape groove 43 is formed in each of the opposing surfaces 41 by recessing the edge on the inner surface side of the short side wall 11 in a stepped manner, and a portion of the opposing surface 41 other than the second escape groove 43 is the second escape groove 43. It is a positioning unit 42. The second relief groove 43 gradually narrows downward, while the second positioning portion 42 gradually narrows upward. Further, the second positioning portions 42 are slightly inclined so as to approach each other toward the groove end surface 45 side. The lower end of the second escape groove 43 is open, and the inner surface of the second escape groove 43 is connected to the groove bottom 48 of the groove 49. The groove bottom surface 48 is gently rounded and concave.

  In the present embodiment, the first relief groove 47 corresponds to the “first relief portion” described in the claims, and the second relief groove 43 corresponds to the “second relief portion” described in the claims. Escape part ". Further, the entire groove bottom surface 48 is a “third relief portion” described in the claims.

  The plurality of first end positioning portions 31 of the short side wall 11 receive the first ends 91 of the work 90 in the first partitioned area R1. When the first end portions 91 are received by the first end position determining portions 31, the second positioning portions 42, 42 come into contact with or are adjacent to the side surfaces of the first end portion 91 from both sides in the second horizontal direction H <b> 2. Then, from one side in the first horizontal direction H1, the first positioning portions 46, 46 are in contact with or adjacent to the end surface 91T of the first end portion 91, and the first end portion 91 is positioned from three directions. In this state, a space is formed between the end surface 91T of the first end portion 91 and the inner surface of the first relief groove 47, and between the side surface of the first end portion 91 and the inner surface of the second relief groove 43. A space is formed. Further, the work 90 has the first and second intermediate shaft portions 94 and 95 supported from below by the first and second intermediate support portions 34 and 35, and as shown on the right side of FIG. The end portion 91 is held in a state of floating from the groove bottom surface 48 of the first end portion positioning portion 31. Accordingly, a space is also formed between the groove bottom surface 48 and the side surface of the first end portion 91, and the space formed by the first escape groove 47 and the second escape groove 43 communicates with the space. Then, as shown in FIG. 10B, when the sheet 80 is pushed into the first end positioning portion 31 of the short side wall 11 by the first end 91, a part of the sheet 80 (reference numeral in FIG. 81) is loosely accommodated in the space formed between the first escape groove 47, the second escape groove 43, and the first end 91 by the groove bottom surface 48.

  FIG. 11 and FIG. 12 show details of the second end positioning portion 32 of the short side wall 11. The second end positioning portion 32 of the short side wall 11 has a groove width of the groove portion 49 wider than that of the first end positioning portion 31 of the short side wall 11, but has the same basic structure. Therefore, parts having the same structure as that of the first end position determining unit 31 are denoted by the same reference numerals, and redundant description will be omitted. The plurality of second end positioning portions 32 of the short side wall 11 receive the second end 92 of the work 90 in the second section area R2.

  As shown on the left side of FIG. 16, in the second end position determining portion 32, the groove bottom surface 48 comes into contact with the second end portion 92. Otherwise, similarly to the positioning of the first end 91 by the first end positioning unit 31, the second end positioning unit 32 positions the second end 92. Then, as shown in FIG. 12B, when the sheet 80 is pushed into the second end positioning section 32 of the short side wall 11 by the second end 92, the first end of the second end positioning section 32. A part (see reference numeral 81) of the sheet 80 is loosely accommodated in a space formed between the escape groove 47 and the second escape groove 43 and the second end 92.

  FIGS. 13 and 14A show the detailed structure of the first and second end positioning portions 31 and 32 of the bank portion 20. FIG. As shown in the figure, on the bank portion 20, first work receiving grooves 51 and second work receiving grooves 52 penetrating in the first horizontal direction H1 are alternately arranged in the second horizontal direction H2. The first and second work receiving grooves 51 and 52 have a step in the middle in the first horizontal direction H1, and the groove width is different at one end and the other end from the step. The wide portion of the first work receiving groove 51 is located on the second partition area R2 side, while the wide portion of the second work receiving groove 52 is located on the first partition area R1 side.

  Further, the groove width of the entire second work receiving groove 52 is wider than the groove width of the entire first work receiving groove 51. The portion of the bank portion 20 where the first work receiving groove 51 is formed forms the first end positioning portion 31 of the second section area R2, while the portion where the second work receiving groove 52 is formed is the first end positioning portion 31. The second end position determining unit 32 of the one section area R1 is formed. That is, the inside surface of each of the wide portions of the first and second work receiving grooves 51 and 52 is formed with the opposing surface 41 including the above-described second positioning portion 42 and the second escape groove 43 and the groove bottom surface 48. Have been. Further, the step surface between the narrow portion and the wide portion of the first and second work receiving grooves 51 and 52 is formed by the first end positioning portion 31 and the second end positioning portion of the short side wall 11 described above. The inside of narrow portions of the first and second work receiving grooves 51 and 52 forms the above-described first relief groove 47 and opens at the center of the step surface. Then, both side portions of the first relief groove 47 on the step surface serve as first positioning portions 46, 46.

  The second end portion locating portion 32 of the bank portion 20 receives the second end portion 92 of the work 90 in the first partitioned area R1, while the first end portion locating portion 31 of the bank portion 20 has The first end 91 of the work 90 in the second section area R2 is received. Then, the first end 91 and the second end 92 are positioned similarly to the first and second end positioning portions 31 and 32 of the short side wall 11 and a part 81 of the sheet 80 (FIG. 14 ( B) is formed between the first end 91 and the second end 92.

  This concludes the description of the configuration of the work carrier 10 of the present embodiment. Next, the operation and effect of the work carrier 10 will be described. As shown in FIG. 8, a sheet 80 is laid on the entire upper surface of the work carrier 10 of the present embodiment, and one end side to the other end side of the first and second partition areas R1 and R2 in the second horizontal direction H2. When the work 90 is fitted into the fitting portion 30 in order toward the sheet, the sheet 80 is partially pushed into the fitting portion 30. At this time, in the first and second end position determining sections 31 and 32, the sheet 80 extends along a corner where the side surface of the work 90 intersects the end faces 91T and 92T (hereinafter, referred to as “end face corner”). Is folded, for example, a part of the sheet 80 overlaps to form a fold. When the work 90 is pushed further downward while the folds and thickened portions are held between the upper portions of the first and second end positioning portions 31 and 32 and the work 90, the sheet 80 Of these, the load may concentrate on the portion pressed by the corner of the end face of the work 90 and break.

  On the other hand, in the work transporting device 10 of the present embodiment, the first escape groove 47 is formed in the central portion in the lateral direction of the first positioning portion 46, and a part of the sheet 80 is loosely received therein. The holding force on the sheet 80 by the upper portions of the first and second end positioning portions 31 and 32 and the work 90 is reduced. Further, a part of the sheet 80 is loosely received in the second escape groove 43 formed on the edge of the second positioning portion 42 on the side of the first positioning portion 46, and the holding force on the sheet 80 is further increased. The load is reduced to reduce the load. Further, a space is formed between the entire groove bottom surface 48 of the first end positioning portion 31 and the work 90, and a part of the sheet 80 is loosely received there, so that the holding force on the sheet 80 is further increased. The load is reduced to reduce the load. In addition, since the space between the groove bottom surface 48 and the work 90 communicates with the spaces in the second escape groove 43 and the first escape groove 47, a part of the sheet 80 can easily move between them. it can. Thus, the load when the sheet 80 is pushed by the corner of the end face of the work 90 is reduced, and the sheet 80 is hardly broken. Further, since the first and second escape grooves 43, 47 are opened on the upper surfaces of the first and second end positioning portions 31, 32, the first and second escape grooves 43, 47 are formed in the first and second escape grooves 43, 47. A part of the received sheet 80 can be pulled out upward from the upper surface openings of the first and second relief grooves 43 and 47 and freely circulated, for example, to easily overlap the sheet 80 on the work 90. it can.

  Further, the work carrier 10 of the present embodiment has a box-shaped container structure which is entirely open on the upper surface, and has first and second end portions formed on side protruding portions 40 protruding from inner surfaces of the short side wall 11 and the long side wall 12 thereof. Since the positioning parts 31 and 32 are formed, the work carrier 10 having a box-shaped container structure can be made compact. Further, the first and second end positioning portions 31 and 32 of the partition areas R1 and R2 are alternately arranged on the bank portion 20 separating the first and second partition areas R1 and R2. The work carrier 10 can also be made compact in this respect.

[Second embodiment]
Hereinafter, an embodiment of the work carrier 10V illustrated in FIGS. 17 to 20 will be described. Although the inside of the work carrier 10 of the first embodiment is partitioned into first and second partition areas R1 and R2 by the bank portion 20, as shown in FIG. 10V does not correspond to the bank portion 20, and a plurality of fitting portions 30V are arranged side by side between a pair of short side walls 11, 11, and the end positions of both ends of each fitting portion 30V are determined. The portions 31V, 31V are formed integrally with the pair of long side walls 12, 12.

  Although not shown, the work to be fitted to each fitting portion 30V has a columnar or cylindrical shape having the same outer diameter at both ends. Correspondingly, as shown in FIG. 18, the end positioning portions 31V, 31V at both ends of the fitting portion 30V have the groove portions 49 having the same shape. As shown in FIG. 19, the groove bottom surface 48 of the groove portion 49 is formed in an arc shape, and the work is held in a state of being floated from the bottom wall 14 of the work carrier 10V with both ends supported by the groove bottom surface 48. You. Then, the work is sandwiched from both sides by a pair of second positioning portions 42, 42 rising obliquely upward from both sides of the groove bottom surface 48, and the end face of the work faces the inner side surface of the long side wall 12. ing. A first relief groove 47 and a first positioning portion 46 are provided in the long side wall 12 at a position facing the end face of the work. Further, the entire edge of the inner surface of the long side wall 12 of the inner surface of the groove 49 is depressed to form the second relief groove 43.

  The work carrier 10V of the present embodiment also has an inner surface concave portion 18, an inner surface projecting portion 19, an outer surface projecting portion 17, and the like, as shown in FIGS. Can be stacked in any state.

  [Other embodiments]

  (1) The end of the work 90 of the first embodiment has a circular cross section, but may have an elliptical cross section or a polygonal cross section. The end of the work may have a solid structure or a hollow structure. The work may be bent in a crank shape and extend substantially horizontally.

  (2) In the fitting portion 30 of the first embodiment, the first relief groove 47 is formed in the center of the groove end surface 45, and the first positioning portions 46 are arranged on both sides of the groove. The first positioning portion 46 and the first escape groove 47 may be arranged separately on one of the left and right sides and the other side of the groove end surface 45.

  (3) The fitting portions 30 and 30V of the first and second embodiments have a structure in which the work 90 is accommodated inside by forming a container structure. A part or all of the structure described in the first or second embodiment may be applied. Further, a part or the whole of the structure described in the first or second embodiment may be applied to a work carrier that holds a work while being housed inside a box.

10, 10V Work carrier 11, 12 Side wall 14 Bottom wall 20 Embankment part 30, 30V Fitting part 31 First end positioning part 31V End positioning part 32 Second end positioning part 40 Side projection 42 First 2 positioning part 43 2nd relief groove (2nd relief part)
46 1st positioning part 47 1st relief groove (1st relief part)
48 Groove bottom 49 Groove 80 Sheet 90 Work 91T, 92T End surface R1 First section area R2 Second section area

Claims (6)

In a work carrier having a fitting portion that extends substantially horizontally and a work covered with a sheet from below is fitted from above,
The fitting portion includes a first positioning portion facing an end surface of the work, and a pair of second positioning portions sandwiching the end of the work from the side, and the end portion of the work from three sides. An end positioning part for positioning is provided,
A work transport device in which a first relief portion for partially receiving the sheet is formed by depressing or removing a part of the first positioning portion.   2. The second relief portion according to claim 1, wherein an edge of the second positioning portion on the side of the first positioning portion is depressed or removed to form a second relief portion that partially receives the sheet. 3. Work carrier.   3. The work carrier according to claim 1, wherein a third relief portion for partially receiving the sheet is formed by curving or partially depressing a bottom surface of the end positioning portion. 4. .   4. The work carrier according to claim 1, wherein an upper end of the first relief portion is opened on an upper surface of the fitting portion. 5. A plurality of partition areas in which a plurality of the fitting portions are arranged side by side at a constant pitch are provided in a row and a plurality, and a bank portion is formed along a boundary line between the adjacent partition areas,
The bank portion has a plurality of first through grooves penetrating in the vertical arrangement direction and having one end narrowed stepwise from the other end, and the other end narrowed stepwise from the one end. And a plurality of second through-grooves are alternately arranged at a half pitch of the constant pitch,
The first positioning portion is constituted by a step portion between the wide portion and the narrow portion of the first and second through grooves, and the pair of second portions is formed by a pair of opposing portions in the wide portion. The work carrier according to any one of claims 1 to 4, wherein a positioning portion is configured, and the space between the narrow portions forms the first relief portion. The entire work carrier has a box-shaped container structure with an open top and a side wall at the outer edge,
A groove is provided in a side projection protruding from the inner surface of the side wall,
The pair of second positioning portions are formed by a pair of opposed portions in the groove, and the first relief portion is formed by depressing an inner surface of the side wall at one end of the groove. The work carrier according to any one of claims 1 to 5.

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