Transport equipment

Abstract

To provide a transport device having higher strength than before.SOLUTION: In a transport device 10A of the present disclosure, engagement protrusions 60A and 60B are hung down not only from a first side wall 31 that stands on a first outer edge portion and having a lateral width substantially the same as a total length of the first outer edge portion of a base member 11 of side wall members 30 assembled to the base member 11, but also from a second side wall 32 that is bent at a right angle from the first side wall 31 and stands only on a part of a second outer edge portion of the base member 11, and the engaging protrusions 60A and 60B are engaged with engaging recesses 50A and 50B of the base member 11.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present disclosure relates to a delivery device having a side wall attached to the outer edge of an upper surface of a base member having a rectangular shape in a plan view. [Background technology]

[0002] Conventionally, a conveying device of this type is known that comprises a base member that is rectangular in plan view, to which is attached a pair of side wall members that are roughly U-shaped in plan view and that form part of the rectangle, and that allows luggage to be loaded and unloaded through a side wall opening between the pair of side wall members (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2009-262994 A (Fig. 2) Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the conventional conveying devices described above, luggage could come into contact with the portions of a pair of side wall members located on either side of the side wall opening, causing the side wall members to deform, so there is a demand for the development of conveying devices that are stronger than conventional ones. [Means for solving the problem]

[0005] In order to solve the above problems, First aspect of the inventiona pair of sidewall members each having a substantially U-shape or L-shape in plan view attached to a base member having a rectangular shape in plan view, each of the sidewall members having a first side wall standing on the first outer edge portion and having a width substantially the same as the overall length of a pair of opposing first outer edge portions in the plan view of the base member, and a second side wall standing on the second outer edge portion and having a width less than 1 / 2 the overall length of a remaining pair of second outer edge portions in the plan view of the base member, the transport device having a sidewall opening between the second sidewalls on the same second outer edge portion, the transport device comprising a plurality of engaging protrusions depending from the first side wall and the second side wall, and a plurality of engaging recesses formed in the base member into which the engaging protrusions are inserted from above and engage with each other.

[0006] Second aspect of the invention a pair of first bank portions protruding upward from the upper surface of the base member and having the engagement recess are provided on the pair of first outer edge portions, and a pair of second bank portions protruding upward from the upper surface of the base member higher than the first bank portions and having the engagement recess are provided on the pair of second outer edge portions, the first side wall stands up on the first bank portions, and the second side wall has a lower surface located above the lower surfaces of the first side walls and stands up on the second bank portions. First aspect 2 is a delivery device according to the present invention.

[0007] Third aspect of the invention an insertion amount of the engaging protrusion of the second side wall into the engaging recess is greater than an insertion amount of the engaging protrusion of the first side wall into the engaging recess. Second aspect 2 is a delivery device according to the present invention.

[0008] Fourth aspect of the inventionThe engagement recess is provided with an upper surface opening and an inner surface opening that open to the upper surface and inner surface of the first bank portion or the second bank portion, a pair of opening protrusion walls that are located on both sides of the inner surface opening to narrow the width of the inner surface opening to be smaller than the width of the upper surface opening and the inside of the engagement recess, and a pair of locking protrusions that protrude from either the pair of opening protrusion walls or the inner surface of the engagement recess that faces them, and the pair of side wall members and a folding side wall set are selectively assembled to the base member, and the folding side wall set has an engagement leg having a width that fits just inside the inner surface opening and a front protrusion that protrudes from both side surfaces of the engagement leg. a pair of first folding side walls having a hinge engaging portion on an underside thereof, the hinge engaging portion having a structure in which a pair of hinge pins protrude and engage with undersides of the pair of locking projections, the hinge engaging portion being rotatably engaged with the engagement recess of the first bank portion to change between an assembled state in which the first bank portion stands up and a folded state in which the second bank portion stands down on the base member; and a pair of second folding side walls having the hinge engaging portion on an underside thereof, the hinge engaging portion being rotatably engaged with the engagement recess of the second bank portion to change between an assembled state in which the second bank portion stands up and a folded state in which the second bank portion stands down on the base member. Second aspect or Third aspect 2 is a delivery device according to the present invention.

[0009] Fifth aspect of the invention The engaging protrusion includes an engaging protrusion body having a width that fits just inside the inner surface opening and that fits into the lateral middle portion of the engaging recess including the inner surface opening, a pair of side protruding walls that fit between the pair of opening protruding walls and the inner surface of the engaging recess facing the pair of opening protruding walls, and a retaining portion that engages with a part of the inside of the engaging recess so as to prevent the engaging protrusion from slipping out of the engaging recess. Fourth aspect 2 is a delivery device according to the present invention.

[0010] Sixth aspect of the invention A connecting rib is provided at an inner corner between the first side wall and the second side wall of the pair of side wall members, connecting the inner surface of the first side wall and the inner surface of the second side wall. First aspect from Fifth aspect Any one of Aspects 2 is a delivery device according to the present invention. Effect of the Invention

[0011] First aspect of the invention In the carrier, among the sidewall members assembled to the base member, engaging protrusions hang down not only from a first sidewall that has a width substantially equal to the entire length of a first outer edge of the base member and stands on the first outer edge, but also from a second sidewall that is bent at a right angle from the first sidewall and stands only on a part of the second outer edge of the base member, and these engaging protrusions engage with engaging recesses of the base member. This improves the strength of the carrier compared to conventional carriers, and the carrier is not easily deformed even if the luggage abuts against the second sidewall when loading or unloading the luggage through the sidewall opening between the pair of second sidewalls.

[0012] Second aspect of the invention In this conveying device, a first bank portion and a second bank portion protrude from the outer edge of the upper surface so as to surround the upper surface of the base member, and a first side wall and a second side wall stand up above them. Therefore, if a load shifts sideways on the base member, the lower part of the load is received by the first bank portion or the second bank portion, thereby reducing the load on the first side wall and the second side wall.

[0013] Third aspect of the invention In the delivery device, the amount by which the engaging protrusion of the second side wall is inserted into the engaging recess is greater than the amount by which the engaging protrusion of the first side wall is inserted into the engaging recess, so that the upright posture of the second side wall is stable.

[0014] Fourth aspect of the invention According to this configuration, the base member is a common part between a conveying device having a folding side wall set assembled to a base member and a conveying device having a pair of side wall members assembled to a base member, thereby reducing the manufacturing costs of the base member.

[0015] Fifth aspect of the invention According to this conveying device, the engaging recesses can be effectively utilized. Also, by simply inserting the engaging protrusions of the first side wall into the engaging recesses, the engaging protrusions are prevented from coming off the engaging recesses.

[0016] Sixth aspect of the invention According to this configuration, the first side wall and the second side wall are connected and reinforced by the connecting rib, increasing the strength of the side wall member. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a perspective view of a delivery device according to an embodiment of the present disclosure. [Diagram 2] A perspective view of the upper surface side of the base member [Diagram 3] A perspective view of the lower surface side of the base member [Figure 4] A perspective view of a corner portion of the base member [Diagram 5] 1 is a perspective view of the lower surface side of the leg of the base member; [Figure 6] FIG. 1 is a perspective view of an inner surface of a side wall member; [Figure 7] FIG. 3 is a perspective view of the outer surface side of the side wall member; [Figure 8] FIG. 11 is a perspective view of an engagement protrusion of a first side wall; [Figure 9] FIG. 4 is a perspective view of an engagement protrusion of the second side wall; [Figure 10] FIG. 13 is a perspective view of a state in which the engagement protrusion of the first side wall is engaged with the engagement recess; [Figure 11] FIG. 13 is a perspective view of a state in which the engagement protrusion of the second side wall is engaged with the engagement recess; [Figure 12] FIG. 1 is a perspective view of the upper surface side of a corner portion of a side wall member; [Figure 13] FIG. 1 is a perspective view of the transport device stacked in layers; [Figure 14] FIG. 13 is an enlarged perspective view of abutting portions of stacked conveying devices; [Figure 15] FIG. 1 is a perspective view of a collapsible carrier; [Figure 16] FIG. 1 is a perspective view of the inner surface side of a first side wall; [Figure 17] FIG. 1 is a perspective view of the outer surface side of the second side wall [Figure 18] 1 is a cross-sectional view of an engagement portion between a first side wall and a second side wall; [Figure 19] 1 is a cross-sectional view of an engagement portion between a first side wall and a second side wall; [Figure 20] FIG. 4 is a perspective view of a state in which only one of the second side walls is folded; [Figure 21] FIG. 2 is a perspective view of the carrier in a folded state; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] A conveying device 10A according to an embodiment of the present disclosure will be described below with reference to Figs. 1 to 21. The conveying device 10A shown in its entirety in Fig. 1 is formed by assembling a base member 11, which is, for example, a resin injection-molded product, and a pair of side wall members 30. Fig. 2 shows the base member 11 in a standalone state. As shown in the figure, the base member 11 has a structure in which, for example, legs 15 hang down from the four corners of the lower surface of a bottom wall 12 having a rectangular planar shape, and a pair of first banks 13 and a pair of second banks 14 protrude upward from the outer edge of the upper surface.

[0019] Hereinafter, the direction parallel to the long side of the rectangular planar shape of the bottom wall 12 will be referred to as a first horizontal direction H1, and the direction parallel to the short side will be referred to as a second horizontal direction H2.

[0020] The bottom wall 12 has a lattice structure as a whole, with a plurality of squares that penetrate vertically. The pair of first banks 13 are disposed at a pair of first outer edges parallel to a first horizontal direction H1 among the outer edges of the upper surface of the bottom wall 12, and protrude upward from the upper surface of the bottom wall 12. Meanwhile, the pair of second banks 14 are disposed at a pair of second outer edges parallel to a second horizontal direction H2 among the outer edges of the upper surface of the bottom wall 12, and protrude upward from the upper surface of the bottom wall 12, and the height of the second banks 14 is 3 to 5 times the height of the first banks 13.

[0021] 4, the first bank portion 13 and the second bank portion 14 each include main walls 13A, 14A that rise from a position on the upper surface of the bottom wall 12 that is shifted inward from the outer surface of the bottom wall 12 (see FIG. 2), and have a structure in which reinforcing ribs protrude from the outer surfaces of the main walls 13A, 14A (see FIG. 2), with the tips of the ribs being disposed approximately flush with the outer surface of the bottom wall 12. Furthermore, the approximately horizontal upper surfaces of the first bank portion 13 and the second bank portion 14 are formed by upper surface ribs 13B, 14B that protrude outward from the upper edges of the main walls 13A, 14A among the ribs.

[0022] 2, both lateral ends of the first bank portion 13 are provided with bank protrusions 13Z that are stepped higher than the entire upper surface of the bottom wall 12 and are perpendicular to the second bank portion 14. In addition, above the bank protrusions 13Z, there are provided upper bank protrusions 13X that are bent at a right angle from the upper part of the second bank portion 14.

[0023] 4, the bank-top protrusion 13X protrudes less from the second bank portion 14 than the bank protrusion 13Z, and its tip surface is parallel to the inner surface of the second bank portion 14. The upper surface of the bank-top protrusion 13X is flush with the upper surface of the second bank portion 14, and an inclined surface 13S is formed at the corner between the upper surface and the tip surface of the bank-top protrusion 13X. An angular groove 13Y is formed between the bank-top protrusion 13X and the bank protrusion 13Z.

[0024] As shown in Fig. 2, the first bank portion 13 has engagement recesses 50A at a plurality of positions evenly distributed in the longitudinal direction. As shown in Fig. 4, each engagement recess 50A has an upper surface opening 55 that opens on the upper surface of the first bank portion 13 and an inner surface opening 54 that opens on the inner surface of the first bank portion 13. A pair of vertical grooves 52 extending in the up-down direction is formed on both inner surfaces in the lateral direction (first horizontal direction H1) of the engagement recess 50A. In other words, if the engagement recess 50A is considered to include the pair of vertical grooves 52, it can be said that the engagement recess 50A has a structure in which the bottom surfaces of the pair of vertical grooves 52 form a pair of inner surfaces facing each other in the lateral direction of the engagement recess 50A, and a vertical groove 51 having the same width as the inner surface opening 54 is formed on the remaining inner surface between them. In addition, a pair of opening protrusion walls 54T are provided on both sides of the inner surface opening 54 of the engagement recess 50A, protruding from a pair of inner surfaces of the engagement recess 50A, and these opening protrusion walls 54T give the engagement recess 50A a structure in which the width of its interior and upper surface opening 55 is wider than that of the inner surface opening 54. Furthermore, a locking protrusion 53 is formed in the engagement recess 50A at a vertical midpoint of a portion facing the pair of opening protrusion walls 54T. The locking protrusion 53 is in the shape of a substantially right-angled triangle when viewed from the side of the engagement recess 50A, and has a horizontal lower surface and a slope inclined relative to the lower surface.

[0025] 2, an auxiliary engagement recess 59A is formed between the engagement recesses 50A at the upper end of the first bank portion 13. As shown in Fig. 4, the auxiliary engagement recess 59A is formed by depressing the inner edge of the upper surface of the first bank portion 13 in a stepped shape, and has a horizontal bottom surface and an inner side surface parallel to the inner side surface of the first bank portion 13.

[0026] As shown in Fig. 2, a pair of engagement recesses 50B are formed at both ends in the longitudinal direction of the second bank portion 14. The engagement recesses 50B of the second bank portion 14 have the same basic structure as the engagement recesses 50A of the first bank portion 13, but the engagement recesses 50B of the second bank portion 14 are larger in width and length in the vertical direction than the engagement recesses 50A of the first bank portion 13. In addition, a pair of through holes 50X shown in Fig. 3 are formed in the recess-forming wall 50Z constituting the bottom of the vertical groove 51 of the engagement recess 50B. The pair of through holes 50X are arranged vertically side by side at positions closer to the side of the vertical groove 51 (see Fig. 4) that are farther from the first bank portion 13.

[0027] As shown in Fig. 2, a pair of auxiliary engagement recesses 59B are formed by recessing the inner edge of the upper surface of the second bank portion 14 in a stepped shape between the engagement recesses 50B at the upper end of the second bank portion 14, and one auxiliary engagement recess 59D is formed by recessing the outer edge of the upper surface of the second bank portion 14 in a stepped shape. In addition, corner recesses 59C are formed between both lateral ends of the upper end of the second bank portion 14 and the respective engagement recesses 50B in the vicinity thereof. As shown in Fig. 4, the corner recess 59C is in the form of a groove penetrating the second bank portion 14 from the inside to the outside, and its cross-sectional shape is the same trapezoidal shape as the lower surface protrusion 21X provided on the lower surface of the leg portion 15 described below.

[0028] 3, legs 15 have a rectangular cross section and hang down from the four corners of bottom wall 12, with the two outer surfaces of each leg 15 being flush with the two outer surfaces of bottom wall 12. Hereinafter, the structure of legs 15 will be described in detail, with the corner between the two outer surfaces of leg 15 that are flush with the two outer surfaces of bottom wall 12 referred to as the outer corner, the diagonal corner referred to as the inner corner, the corner located directly below first bank portion 13 referred to as the long side corner, and the remaining corners referred to as the short side corners.

[0029] As shown in Fig. 5, the lower surface of the leg 15 is provided with a bulky protrusion 20 and bottom protrusions 21X, 21Y. The bulky protrusion 20 has a rectangular shape in plan view that is smaller than the leg 15, and the two outer surfaces of the bulky protrusion 20 are flush with the outer surfaces on both sides of the inner corners of the leg 15. The bulky protrusion 20 provides the lower surface of the leg 15 with a lowermost step surface 15K, which is also the lower surface of the bulky protrusion 20, and an L-shaped upper step surface 15J that is stepped upward from the lowermost step surface 15K and has an L-shape in plan view. The bottom protrusions 21X, 21Y protrude from the L-shaped upper step surface 15J.

[0030] The lower protrusion 21X is disposed at the midpoint of one side of the L of the L-shaped upper surface 15J, and the lower protrusion 21Y is disposed at the end of the long side corner of the other side of the L. The lower protrusions 21X, 21Y are trapezoidal when viewed from behind the raised protrusion 20, and the lower end surfaces 21A of the lower protrusions 21X, 21Y are located in a common horizontal plane and slightly above the lower surface 15K. The front surfaces of the lower protrusions 21X, 21Y when viewed from behind the raised protrusion 20 are flush with the outer surfaces of the legs 15 and the two outer surfaces of the bottom wall 12. Furthermore, the first side surface 21C of the lower protrusions 21X, 21Y, which is away from the leg 15 and the outer corner, forms a slope with a small inclination angle with respect to the vertical direction, and the second side surface 21B on the opposite side forms a slope with a large inclination angle with respect to the vertical direction.

[0031] When the base members 11 are stacked in a single unit state, the lower surface protrusion 21X of the upper base member 11 fits into the corner recess 59C (see FIG. 4) of the lower base member 11, and the L-shaped upper surface 15J of the leg 15 abuts against the upper surface of the second bank portion 14 and the bank upper protrusion 13X. Also, the second side surface 21B of the lower surface protrusion 21Y of the upper base member 11 is adjacent to the inclined surface 13S (see FIG. 4) of the bank upper protrusion 13X of the lower base member 11.

[0032] 6 and 7, the sidewall member 30 has a structure in which a pair of second sidewalls 32 are bent at right angles from both sides of a first sidewall 31, and is substantially U-shaped in plan view. The width of the first sidewall 31 is substantially the same as the size of the base member 11 in the first horizontal direction H1, and the width of the second sidewall 32 is smaller than 1 / 2 (more specifically, 1 / 3 or less) the size of the base member 11 in the second horizontal direction H2. Furthermore, the lower surfaces of the second sidewalls 32 are located above the lower surface of the first sidewall 31, and the lower surface of the first sidewall 31 is provided with a plurality of engaging protrusions 60A and a plurality of auxiliary engaging protrusions 69A, and the lower surface of each second sidewall 32 is provided with one engaging protrusion 60B and one corner protrusion 69C. As shown in FIG. 1, the pair of side wall members 30 are assembled to the base member 11 by engaging the engagement protrusions 60A, 60B, auxiliary engagement protrusions 69A, and corner protrusions 69C with the engagement recesses 50A, 50B, auxiliary engagement recesses 59A, and corner recesses 59C of the base member 11, so that each first side wall 31 stands up on a pair of first bank portions 13 of the base member 11 and each second side wall 32 stands up on the second bank portions 14 of the base member 11.

[0033] 8, the engaging protrusion 60A of the first side wall 31 has a structure including a pair of side protruding walls 62 on both sides of the engaging protrusion main body 61. The engaging protrusion main body 61 has a structure in which the lower ends of three vertical ribs 61A extending on the extension line of the lattice-shaped rib 31L of the first side wall 31 are connected by a horizontal rib 61B, and a reinforcing plate 61P is stretched in the portion surrounded by the vertical ribs 61A, the horizontal ribs 61B, and the lower surface of the first side wall 31. The engaging protrusion main body 61 is fitted across the inner surface opening 54 of the engaging recess 50A and the vertical groove 51 (see FIG. 4), and with one surface in the thickness direction of the engaging protrusion main body 61 overlapping the inner surface of the vertical groove 51, the other surface in the thickness direction of the engaging protrusion main body 61 is disposed flush with the inner surface of the first bank portion 13.

[0034] The side protruding walls 62 protrude laterally from a position near the upper end of the center in the width direction of the side surface of the engaging protruding portion main body 61, and have a structure in which a reinforcing plate 62P is stretched on the inside of an L-shaped rib 62L that is bent upward at a right angle and connected to the underside of the first side wall 31. The pair of side protruding walls 62 fit into the portions of the pair of vertical grooves 52 of the engaging recess 50A that are above the locking protrusions 53.

[0035] Some of the engaging protrusions 60A of the first side wall 31 have a retaining portion 63 hanging down from one of the side projecting walls 62. The retaining portion 63 extends downward from the vertical side of the L-shaped rib 62L of the side projecting wall 62, and has a right-angled triangular retaining projection 63T at its lower end. The retaining portion 63 is narrower in width than the L-shaped rib 62L of the side projecting wall 62.

[0036] Then, as shown in FIG. 10, when the engaging protrusion 60A engages with the engaging recess 50A, the anti-slip portion 63 passes through the gap between the locking protrusion 53 and the opening protrusion wall 54T, so that the anti-slip protrusion 63T is positioned below the locking protrusion 53, and the anti-slip protrusion 63T engages from below with an internal rib 13L having an underside flush with the underside of the locking protrusion 53 within the first bank portion 13, thereby preventing the engaging protrusion 60A from slipping out of the engaging recess 50A.

[0037] The retaining structure may be, for example, a structure in which the retaining projection 63T of the retaining portion 63 is engaged with the lower surface of the locking projection 53 to prevent the engaging projection 60A from falling off from the engaging recess 50A. Alternatively, a part of the wall in the engaging recess 50A may be cut off in a cantilever shape to provide a locking projection at its tip, and the locking projection may be engaged with the side protruding wall 62 or the upward surface of the engaging projection main body 61 from above to prevent the engaging projection 60A from falling off from the engaging recess 50A.

[0038] Also, as shown in FIG. 8, the auxiliary engagement protrusion 69A of the first side wall 31 is composed of a rib and a reinforcing plate, similar to the engagement protrusion main body 61, and protrudes from the inner edge portion of the lower surface of the first side wall 31, and fits exactly into the auxiliary engagement recess 59A of the first bank portion 13, as shown in FIG. 10.

[0039] As shown in FIG. 9, the corner protrusion 69C of the second side wall 32 has the same shape as the lower surface protrusion 21X (see FIG. 5) described above, and fits exactly into the corner recess 59C of the second bank portion 14 as shown in FIG.

[0040] The engaging protrusion 60B of the second side wall 32 is composed of a rib and a reinforcing plate, similar to the engaging protrusion main body 61, and has a vertically long rectangle as a whole. In detail, the engaging protrusion 60B has, for example, two vertical rows of three squares 64M divided by the rib 64L. The reinforcing plate 64P is disposed on the outer side of the engaging protrusion 60B only for the two lower squares 64M in the row far from the first side wall 31, and is disposed on the inner side of the engaging protrusion 60B for the remaining squares 64M. Furthermore, the reinforcing plate 64P (hereinafter referred to as the outer reinforcing plate 64P1) of the two squares disposed on the outer side of the engaging protrusion 60B has one through hole 60M formed for each square 64M. Furthermore, the two squares do not have a vertical rib on the side far from the first side wall 31, and are open to the side in the width direction.

[0041] The engaging protrusion 60B of the second side wall 32 is fitted across the inner surface opening 54 of the engaging recess 50B and the vertical groove 51 (see FIG. 4), and as shown in FIG. 11, one surface in the thickness direction of the engaging protrusion 60B including the outer surface of the outer reinforcing plate 64P1 overlaps with the inner surface of the vertical groove 51 which is also the inner surface of the through hole 50X of the engaging recess 50B, and the other surface in the thickness direction of the engaging protrusion 60B is disposed flush with the inner surface of the second bank portion 14. Also, a pair of through holes 60M of the engaging protrusion 60B overlap with a pair of through holes 50X of the engaging recess 50B.

[0042] A bolt B is passed through the overlapping through hole 60M and through hole 50X and screwed into a nut N. More specifically, a washer W1 is passed through the bolt B, and the bolt B is passed through the through hole 50X and through hole 60M so that the head portion of the bolt B is disposed outside the second bank portion 14. A spring washer W2 is passed through the bolt B from the inside of the engaging protrusion 60B, and the nut N is screwed into the bolt B. The bolt B and the nut N are fitted into the squares 64M of the engaging protrusion 60B so as not to protrude from the inner surface of the engaging protrusion 60B.

[0043] 12, upper surface recesses 41X, 41Y corresponding to the lower surface protrusions 21X, 21Y of the leg portion 15 are formed on the upper surface of the corner portion between the first side wall 31 and the second side wall 32. That is, the upper surface recesses 41X, 41Y are formed on both sides of the corner portion between the first side wall 31 and the second side wall 32, and each of them is a groove-like shape penetrating the side wall member 30 from the inside to the outside. The cross-sectional shape of the upper surface recesses 41X, 41Y is a trapezoid that is approximately the same as the trapezoid that is the cross-sectional shape of the lower surface protrusions 21X, 21Y, and has a first side surface 41B and a second side surface 41C that are inclined in the up-down direction on both sides of a horizontal bottom surface 41A.

[0044] Then, when the conveying devices 10A are stacked as shown in FIG. 13, the lower surface protrusions 21X, 21Y of the legs 15 of the upper conveying device 10A are received in the upper surface recesses 41X, 41Y of the lower conveying device 10A, and the L-shaped upper surface 15J of the legs 15 on the upper side abuts against the upper surface of the sidewall member 30 on the lower side, as shown in FIG. 14.

[0045] 12, an upper surface protrusion 42 facing the side surface of the leg 15 is provided next to the upper surface recess 41Y on the upper surface of the first side wall 31, and an upper surface protrusion 43 facing the side surface of the leg 15 is also provided on the end of the upper surface of the second side wall 32 away from the upper surface recess 41X. The upper surface protrusion 42 has an upper surface 42A that is horizontal above the upper surface of the entire side wall member 30, and shares a second side surface 41C on the upper surface recess 41Y side with the upper surface recess 41Y. That is, the second side surface 41C is a flat surface that continues from the bottom surface 41A of the upper surface recess 41Y to the upper surface 42A of the upper surface protrusion 42. The opposite side of the second side surface 41C of the upper surface protrusion 42 is an inclined surface 42B that gradually descends as it moves away from the upper surface recess 41Y.

[0046] On the other hand, the upper surface protrusion 43 has an upper surface 43A that is in the same horizontal plane as the upper surface 42A of the upper surface protrusion 42, a first side surface 43C that hangs down approximately vertically from the end of the upper surface 43A on the upper surface recess 41X side, and an inclined surface 43B that extends diagonally downward from the end of the upper surface 43A opposite the upper surface recess 41X.

[0047] 11, a plurality of connecting ribs 46, each of which has a generally triangular shape in plan view, are provided at the corner portion between the first side wall 31 and the second side wall 32. The first side wall 31 and the second side wall 32 are connected to each other by these connecting ribs 46 and reinforce each other, increasing the strength of the side wall member 30 itself.

[0048] The above is the description of the configuration of the conveying device 10A of this embodiment. As described above, in the conveying device 10A of this embodiment, the engaging protrusions 60A, 60B hang down not only from the first side wall 31, which has a width substantially equal to the entire length of the first outer edge of the base member 11 among the side wall members 30 assembled to the base member 11 and stands on the first outer edge, but also from the second side wall 32, which is bent at a right angle from the first side wall 31 and stands only on a part of the second outer edge of the base member 11, and these engaging protrusions 60A, 60B engage with the engaging recesses 50A, 50B of the base member 11. This improves the strength of the conveying device 10A compared to the conventional conveying device 10A, and when a baggage is put in or taken out from the side wall opening 10K (see FIG. 1) between a pair of second side walls 32, the conveying device 10A does not easily deform even if the baggage abuts against the second side wall 32.

[0049] In addition, since the insertion amount of the engaging protrusion 60B of the second side wall 32 into the engaging recess 50B is greater than the insertion amount of the engaging protrusion 60A of the first side wall 31 into the engaging recess 50A, and the support force is also higher, the number of engaging protrusions 60B of the second side wall 32 can be made less than the number of engaging protrusions 60A of the first side wall 31.

[0050] In addition, the first bank portion 13 and the second bank portion 14 protrude from the outer edge of the upper surface of the base member 11 so as to surround the upper surface of the base member 11, and the first side wall 31 and the second side wall 32 stand up on them, so that when an item is shifted sideways on the base member 11, the lower part of the item is received by the first bank portion 13 or the second bank portion 14, and the load on the first side wall 31 and the second side wall 32 can be suppressed. Moreover, the second bank portion 14 protrudes higher from the base member 11 than the first bank portion 13 and receives the item over a wider range in the vertical direction than the first bank portion 13, so that the load on the second side wall 32 standing up on the second bank portion 14 can be effectively suppressed. Furthermore, the conveying device 10A of this embodiment shares the base member 11 with the conveying device 10B formed by assembling a folding side wall set described later to the base member 11 instead of a pair of side wall members 30, so that the manufacturing cost of the base member 11 can be suppressed.

[0051] Hereinafter, a description will be given of a transportation device 10B that shares a base member 11 with the transportation device 10A with reference to Fig. 15 to Fig. 21. This transportation device 10B is a so-called folding container, and as shown in Fig. 21, a pair of first folding side walls 80 and a pair of second folding side walls 70 can be folded onto the base member 11.

[0052] Specifically, as shown in FIG. 16, the second folded side wall 70 is a rectangle having a width substantially equal to that of the second bank portion 14, and a pedestal portion 74D is provided on both sides of the inner surface thereof, which extends in the vertical direction and protrudes in a stepped manner from the entire inner surface of the second folded side wall 70. Each pedestal portion 74D is provided with a vertical row of side edge protrusions 74 having the same width as the pedestal portion 74D and a rectangular cross section extending in the vertical direction, and a connecting protrusion 75 protrudes from the edge of the upper surface of each side edge protrusion 74 on the side away from the pedestal portion 74D. In addition, a pair of side wall engagement holes 74K are provided in a row vertically, penetrating the lower end portion of the lower edge portion 74 in the horizontal direction. Furthermore, a lock recess 74R is formed in each of the uppermost and lowermost side edge protrusions 74, which recess in the thickness direction of the second folded side wall 70.

[0053] The lower surface of the second folded side wall 70 is provided with a pair of engagement legs 71 that rotatably engage with a pair of engagement recesses 50B of each second bank portion 14 of the base member 11. The engagement legs 71 are structured such that a pair of hinge pins 72 protrude to both sides from both side surfaces of the lower end of a protrusion having substantially the same width, length, and thickness as the engagement protrusion 60B (see FIG. 6) of the side wall member 30 described above. The pair of hinge pins 72 of each engagement leg 71 of the second folded side wall 70 engage with the lower part of the locking protrusion 53 of the pair of vertical grooves 52 of each engagement recess 50B of the second bank portion 14, and the second folded side wall 70 rotates about the hinge pins 72 as a rotation axis between a state in which it stands on the second bank portion 14 and a state in which it is tilted inward from that state.

[0054] On the lower surface of the second folded side wall 70, on each side of each engaging leg 71, a lower surface protrusion 73A having substantially the same shape as the corner protrusion 69C (see FIG. 6) of the side wall member 30 is provided, and between the pair of engaging legs 71 on the lower surface of the second folded side wall 70, a lower surface protrusion 73C is provided in the center and a pair of lower surface protrusions 73B are provided on both sides. When the second folded side wall 70 is in an upright position on the second bank portion 14, the lower surface protrusion 73A is received in the corner recess 59C (see FIG. 2) of the second bank portion 14, and the lower surface protrusions 73B, 73C are received in the auxiliary engaging recesses 59B, 59D provided between the pair of engaging recesses 50B of the second bank portion 14. In addition, the side edge protrusions 74 on both sides of the second folded side wall 70 are overlapped on the pair of bank upper protrusions 13X of the base member 11.

[0055] 17, the first folding side wall 80 has a structure in which an upper end of a lower divided side wall 81 and a lower end of an upper divided side wall 82 are connected by multiple connecting members 83, and the entire structure has a rectangular shape with approximately the same width as the first bank portion 13. The multiple connecting members 83 have a structure in which hinge pins protrude to both sides from the upper and lower ends of both side surfaces of a vertically extending band plate, and these hinge pins engage with the upper end of the lower divided side wall 81 and the lower end of the upper divided side wall 82 so as to be rotatable and vertically slidable.

[0056] The lower surface of the lower divided side wall 81 is provided with a plurality of engaging legs 90 which rotatably engage with the plurality of engaging recesses 50A of each first bank portion 13 of the base member 11. The engaging legs 90 are structured such that a pair of hinge pins 91 protrude to both sides from both side surfaces of the lower end of a protrusion having substantially the same width, length and thickness as the engaging protrusion body 61 (see FIG. 8) of the engaging protrusion 60A of the side wall member 30 described above. The pair of hinge pins 91 of each engaging leg 90 of the lower divided side wall 81 engage with the lower part of the locking protrusion 53 of the pair of vertical grooves 52 of each engaging recess 50A of the first bank portion 13, and the lower divided side wall 81 rotates about the hinge pins 91 as a rotation axis so as to change between a state in which it stands on the first bank portion 13 and a state in which it is tilted inward from that state. In addition, a lower surface protrusion 92 of approximately the same shape as the auxiliary engagement protrusion 69A of the side wall member 30 is provided between the engagement legs 90 on the underside of the lower divided side wall 81, and when the lower divided side wall 81 is standing upright on the first bank portion 13, the lower surface protrusion 92 is received in the auxiliary engagement recess 59A of the first bank portion 13.

[0057] Each side of the lower divided side wall 81 is provided with a pair of side wall connecting protrusions 86 and one engagement protrusion 87, and when the lower divided side wall 81 stands up on the first bank portion 13, the engagement protrusions 87 engage with the angular groove 13Y of the base member 11, and the pair of side wall connecting protrusions 86 engage with a pair of side wall engagement holes 74K of the second folding side wall 70.

[0058] A plurality of side projections 84 are arranged in a row on both side surfaces of the upper divided side wall 82, and a connecting projection 85 hangs down from the lower edge of the side projections 84 that is far from the side surface of the upper divided side wall 82. A connecting rib 84A is provided between the inner edge of the side surface of the upper divided side wall 82 and the connecting projection 85. Furthermore, locking members 81R, 82R are provided on both sides of the lower divided side wall 81 and the upper divided side wall 82 so as to be slidable laterally. When the locking members 81R, 82R are slid laterally in a state in which the entire first folding side wall 80 stands up and the upper surface of the lower divided side wall 81 is in contact with the lower surface of the upper divided side wall 82, they engage with the locking recess 74R of the second folding side wall 70 in a concave-convex manner. In this state, as shown in FIG. 18, the connecting projection 85 of the upper divided side wall 82 engages with the inside of the connecting projection 75 of the second folding side wall 70, and the connecting rib 84A faces the connecting projection 75 from the inside.

[0059] Furthermore, when the locking member 82R of the upper divided side wall 82 is released and the upper divided side wall 82 is slid upward away from the lower divided side wall 81, the connecting protrusion 75 and the connecting rib 84A no longer face each other as shown in Fig. 19, and the upper divided side wall 82 can be rotated outward to fold the first folding side wall 80 as shown in Fig. 20. Furthermore, the locking member 81R of the lower divided side wall 81 can be released to fold both first folding side walls 80 onto the base member 11, and both second folding side walls 70 can be placed on top of them to bring the entire conveyance device 10B into a folded state as shown in Fig. 21.

[0060] [Other embodiments] (1) In the above embodiment, the pair of side wall members 30 assembled to the base member 11 had a generally U-shape in plan view. However, one of the pair of second side walls 32 provided on the above-mentioned side wall members 30 may be removed to have a generally L-shape in plan view.

[0061] (2) In the conveying device 10A of the above embodiment, the engaging protrusion 60B of the second side wall 32 was fixed to the engaging recess 50B of the base member 11 by the bolt B. However, without being fixed by the bolt B, the engaging protrusion 60B may simply be inserted into the engaging recess 50B.

[0062] (3) Similarly to the engaging protrusion 60A of the first side wall 31, the engaging protrusion 60B of the second side wall 32 may also have a side protruding wall 62 on the side thereof or a structure having a retaining portion 63.

[0063] In addition, although this specification and drawings disclose specific examples of the technology included in the scope of the claims, the technology described in the claims is not limited to these specific examples, but includes various modifications and variations of the specific examples, as well as parts of the specific examples taken alone. [Explanation of symbols]

[0064] 10A, 10B Transport equipment 10K side opening 11 Base material 13 First bank 14 Second bank 30 Side wall member 31 First side wall 32 Second side wall 46 Connecting Rib 50A, 50B Engagement recess 53 Locking protrusion 54 Inner side opening 54T opening projecting wall 55 Top opening 60A,60B Engagement protrusion 61 Engagement protrusion body 62 Side wall 63 Stopper 70 2nd folding side wall (folding side wall set) 71,90 Engagement leg (hinge engagement part) 72,91 Hinge pin (hinge engagement part) 80 1st folding side wall (folding side wall set)

Claims

1. A pair of side wall members each having a substantially U-shape or a substantially L-shape in plan view are attached to a base member having a rectangular shape in plan view, Each of the sidewall members has a first sidewall that stands on a pair of opposing first outer edge portions in a plan view of the base member and has a width that is approximately the same as the overall length of the first outer edge portions, and a second sidewall that stands on the second outer edge portions and has a width that is less than 1 / 2 the overall length of the remaining pair of second outer edge portions in a plan view of the base member, and a sidewall opening is provided between the second sidewalls on the same second outer edge portions, a plurality of engagement protrusions depending from the first side wall and the second side wall; a plurality of engagement recesses formed in the base member into which the plurality of engagement protrusions are inserted from above to engage with each other; The pair of first outer edge portions are provided with a pair of first bank portions that protrude upward from an upper surface of the base member and have the engagement recesses, a pair of second bank portions are provided on the pair of second outer edge portions, the second bank portions protruding upward from the upper surface of the base member higher than the first bank portions and having the engagement recesses; the first side wall stands on the first bank portion, The second side wall has a lower surface located above the lower surface of the first side wall and stands on the second bank portion.

2. The delivery device of claim 1 , wherein an insertion amount of the engagement protrusion of the second side wall into the engagement recess is greater than an insertion amount of the engagement protrusion of the first side wall into the engagement recess.

3. the engagement recess includes an upper surface opening and an inner surface opening that open to the upper surface and inner surface of the first bank portion or the second bank portion, a pair of opening protrusion walls that are located on both sides of the inner surface opening and narrow the width of the inner surface opening compared to the width of the upper surface opening and the interior of the engagement recess, and a pair of locking protrusions that protrude from either the pair of opening protrusion walls or the inner surface of the engagement recess that faces them, The pair of side wall members and the folding side wall set are selectively assembled to the base member, The folding side wall set includes: a pair of first folding side walls each having a hinge engaging portion on its underside, the hinge engaging portion having a structure in which a pair of hinge pins extend from both side surfaces of an engaging leg portion having a width that fits just inside the inner surface opening and engage with the undersides of the pair of locking projections, the hinge engaging portion being rotatably engaged with the engaging recess of the first bank portion to be changeable between an assembled state in which the hinge engaging portion stands on the first bank portion and a folded state in which the hinge engaging portion is laid on the base member; a pair of second folding side walls each having a hinge engaging portion on a lower surface thereof, the hinge engaging portion being rotatably engaged with the engaging recess of the second bank portion to be changeable between an assembled state in which the hinge engaging portion stands on the second bank portion and a folded state in which the side walls are laid on the base member; 3. The delivery device of claim 1 or 2, comprising:

4. The engaging protrusion has an engaging protrusion main body that has a width that fits just inside the inner surface opening and fits into a lateral middle portion of the engaging recess including the inner surface opening; a pair of side protruding walls that fit between the pair of opening protruding walls and inner surfaces of the engagement recesses that face the pair of opening protruding walls; The delivery device according to claim 3 , further comprising a retaining portion that engages with a part of the inside of the engagement recess so as to prevent the engagement protrusion from slipping out of the engagement recess.

5. A conveying device as described in any one of claims 1 to 4, wherein an inner corner between the first side wall and the second side wall of the pair of side wall members is provided with a connecting rib connecting the inner surface of the first side wall and the inner surface of the second side wall.

Images