CN213706219U - Storage box - Google Patents

Abstract

The utility model discloses when improving the assemblability, realize the space-saving of bundle package form. In a frame (20) of a storage box (10), a frame (30) is integrally formed with a front pillar (50) and a rear pillar (60). Therefore, the assembling performance of the storage box (10) can be improved. In addition, on both sides of the frame (30) in the width direction, a hollow part (33) is formed which is recessed inward in the width direction than the outermost shape of the frame (30) in the width direction. When the framework frames (20) are nested, the front pillars (50) of the lower framework frame (20) are disposed in the hollow parts (33) of the upper framework frame (20). Thus, even in the framework frame (20) in which the rear pillar (60) and the front pillar (50) are integrally formed with the frame (30), the framework frames (20) can be nested in a vertically stacked state.

Description

Storage box

Technical Field

The utility model relates to a containing box.

Background

The storage box described in patent document 1 includes racks stacked in multiple stages and a drawer (box) slidably housed in each rack. The frame includes an outer frame and 4 support columns protruding upward from the corners of 4 corners of the outer frame, and the outer frame is formed integrally with the support columns.

Therefore, when assembling the storage box, the outer frame and the support column do not need to be installed, and therefore, the assembling performance of the storage box can be improved.

Documents of the prior art

Patent document

Patent document 1: utility new case registration No. 3028537

SUMMERY OF THE UTILITY MODEL

(problem to be solved by the utility model)

However, in the storage box, the racks are not configured to be nestable in such a manner that the racks are stacked one on top of another in the disassembled state of the storage box. This increases the size of the bundle pack of the storage box, for example. Therefore, the storage box has room for improvement in terms of improving the conveying efficiency of the storage box.

In view of the above, an object of the present invention is to provide a storage box that can achieve a space saving of a bundle package shape while improving assemblability.

(means for solving the problems)

The utility model discloses a 1 or more embodiments are containing box, possess: a framework frame; and a box body formed in a box shape opened to an upper side and housed in the frame in a manner of being slidable in a front-rear direction, the frame including: a bottom frame for placing the box body; a pair of rear stays integrally formed with the bottom chassis and protruding upward from both widthwise ends of a rear end of the bottom chassis; and a pair of front pillars formed integrally with the bottom frame and protruding upward from both width-direction end portions of a front end-side portion of the bottom frame, wherein a pair of cutouts recessed inward in the width direction from an outermost shape in the width direction of the bottom frame are formed between the front pillars and the rear pillars on both width-direction side portions of the bottom frame, and the front pillars of the lower frame are disposed inside the cutouts in the upper frame when the frame frames are nested.

The utility model discloses a 1 or more embodiments are on the basis of above-mentioned containing box, the portion of digging out covers in the width direction of bottom frame both sides portion the front prop with whole position between the rear prop extends along the fore-and-aft direction, the bottom surface of portion of digging out overlook constitute to the curved surface of the outside side of width direction of bottom frame, during the nestification of skeleton frame, the downside the front prop of skeleton frame dispose in the upside in the inside of the front end portion of digging out, and the upside the skeleton frame the curved surface with the downside in the skeleton frame the bight butt of the rear side of front prop.

The utility model discloses a 1 or more embodiments are on above-mentioned containing box, the bottom frame forms to the rectangular frame form the outer peripheral part of bottom frame is formed with to downside buckling and constitutes the outer peripheral rib of excavation portion the outer peripheral part of the width direction both sides of bottom frame is formed with a pair of first rib that extends along the fore-and-aft direction, first rib form to the upside uplift of bottom frame and the open slot-like of downside.

The utility model discloses a 1 or more embodiments are on the basis of above-mentioned containing box, the preceding tip of first rib more toward the front side the width direction outside slope of skeleton frame and with preceding column connection, the rear end of first rib to the width direction outside bucking of skeleton frame and with back column connection.

In the present invention, in addition to the storage box described above, 1 or more embodiments of the present invention are provided with reinforcing ribs that connect the first reinforcing portion and the outer circumferential rib that constitutes the hollow portion, inside the first reinforcing portion.

In the storage box of the present invention, in the bottom frame, a second reinforcing portion extending in the front-rear direction is formed on the inner side in the width direction of the frame with respect to the first reinforcing portion, and the second reinforcing portion is formed in a groove shape protruding toward the lower side of the bottom frame and opening toward the upper side, and is formed continuously with the first reinforcing portion.

In the storage box of the present invention, in the one or more embodiments, a pair of third reinforcing portions extending in the left-right direction and connecting the rear pillars are formed at the outer peripheral portion of the rear side of the bottom frame, the third reinforcing portions are formed in a groove shape protruding toward the upper side of the bottom frame and opening toward the lower side, and a connecting rib connecting the first reinforcing portion and the third reinforcing portion is formed at the frame.

The utility model discloses a 1 or more embodiments are on the basis of above-mentioned containing box the upper end of front pillar and the upper end of back pillar installs the roof, the position of the upper and lower direction of the opening terminal surface of box and dispose in the upside of this box the position of the upper and lower direction of the lower terminal surface of roof is unanimous.

The utility model discloses a 1 or more embodiments are on the basis of above-mentioned containing box, and are a plurality of the frame is installed to the state of piling up from top to bottom, the position of the upper and lower direction of the opening terminal surface of box and dispose in the upside of this box the position of the upper and lower direction of the lower terminal surface of frame is unanimous.

(effects of utility model)

According to one or more embodiments of the present invention, space saving in the form of bundles can be achieved while improving the assemblability.

Drawings

Fig. 1 is a perspective view of the storage box according to the present embodiment, viewed from obliquely right and above, showing a nested state of the frame racks.

Fig. 2 is a perspective view of the storage box according to the present embodiment as viewed from obliquely right above.

Fig. 3 is a plan view of the skeletal frame shown in fig. 2, as viewed from the upper side thereof.

Fig. 4 is a perspective view of the skeletal frame shown in fig. 3, viewed from obliquely above the right.

Fig. 5 is a perspective view of the skeletal frame shown in fig. 3, viewed obliquely from the lower left.

Fig. 6 (a) is a plan view as viewed from the upper side of the case shown in fig. 2, and (B) is a side sectional view as viewed from the right side of the case of (a) (a sectional view taken along line 6B-6B of fig. 6 (a)).

Fig. 7 (a) is a perspective view of the casing shown in fig. 6 (a) viewed from the upper right side, and (B) is a perspective view of the casing (a) viewed from the lower left side.

Fig. 8 is a perspective view of the top plate shown in fig. 2 viewed obliquely from the lower right.

Fig. 9A is a sectional view (sectional view taken along line 9A-9A in fig. 2) as viewed from the front side showing a coupled state of the front pillars and the ceiling plate of the framework frame shown in fig. 2, and (B) is a sectional view (sectional view taken along line 9B-9B in fig. 2) as viewed from the front side showing a coupled state of the front pillars of the framework frame shown in fig. 2.

Fig. 10 is a perspective view showing a right side portion of the storage box shown in fig. 2 in a partially broken state.

Fig. 11 is a plan view of the skeletal frame shown in fig. 1 viewed from above, showing a nested state.

Fig. 12 (a) is a side view showing a bundle form of the storage box shown in fig. 2, and (B) is a side view showing a bundle form of a 4-layer storage box.

Fig. 13 (a) is a side view showing a bundle form of 5-tier storage boxes, and (B) is a side view showing a bundle form of 6-tier storage boxes.

(description of reference numerals)

10 storage box

20 framework frame

30 frame rack (bottom rack)

31 outer circumferential rib

33 hollowed part

Curved surface of 33A

34 first reinforcement part

35 second reinforcement part

36 reinforcing rib

37 third reinforcement part

38 connecting rib

50 front pillar

Corner 50C

60 rear support

70 case body

80 top plate

Detailed Description

The storage box 10 according to the present embodiment will be described below with reference to the drawings. Note that arrows UP, FR, and RH shown as appropriate in the drawings respectively show the upper side, front side, and right side (one side in the width direction) of the storage box 10. In the following description, when the vertical, front-back, and left-right directions are described, the vertical, front-back, and left-right directions of the storage box 10 are described unless otherwise specified.

(regarding the integral structure of the storage box)

As shown in fig. 2, the storage box 10 is formed in a substantially rectangular parallelepiped shape as a whole. The storage box 10 includes: a plurality of (3 in the present embodiment) frame racks 20 constituting the frames of the storage box 10; a plurality of (3 in the present embodiment) cases 70; and a top plate 80 constituting an upper end portion of the storage box 10.

In the storage box 10, the plurality of framework frames 20 are mounted in a stacked state in the vertical direction, and the box body 70 is housed in the interior of each framework frame 20 so as to be slidable in the front-rear direction. The top plate 80 is attached to the uppermost framework frame 20 and covers the box 70 disposed on the uppermost layer from above.

In the present embodiment, the storage box 10 has a structure in which the frame racks 20 are stacked in 3 tiers, but depending on the usage situation, the frame racks 20 may be stacked in 2 tiers or more, or the frame racks 20 may be configured in 1 tier. Hereinafter, each configuration of the storage box 10 will be described.

(frame)

As shown in fig. 3 to 5, the frame chassis 20 is made of a resin material (polypropylene (PP) in the present embodiment). In addition, although details will be described later, in a state before the container box 10 is assembled (disassembled state), the frame racks 20 are configured to be nestable such that the frame racks 20 are stacked one on top of another. The framework chassis 20 includes: a frame chassis 30 as a "bottom chassis" which constitutes the bottom of the skeleton chassis 20; and a pair of left and right front stays 50 and a pair of left and right rear stays 60 extending upward from the frame 30.

The frame 30 is formed in a plate shape having a plate thickness direction in the vertical direction, and is formed in a substantially rectangular frame shape having a longitudinal direction in the horizontal direction in a plan view from the upper side. Thus, the frame chassis 30 includes: a front frame part 30F extending in the left-right direction and constituting a front end part of the frame 30; a rear frame portion 30R extending in the left-right direction and constituting a rear end portion of the frame 30; and a pair of right and left side frame portions 30S extending in the front-rear direction and connecting both end portions in the longitudinal direction of front frame portion 30F and rear frame portion 30R, and a hole portion 30A is formed inside frame 30. Further, an outer circumferential rib 31 curved downward is formed on the outer circumferential edge of the frame 30, and an inner circumferential rib 32 curved downward is formed on the inner circumferential edge of the frame 30. The outer circumferential rib 31 and the inner circumferential rib 32 extend in the circumferential direction of the frame chassis 30. Also, the lower end of the outer circumferential rib 31 in the up-down direction coincides with the position of the lower end of the inner circumferential rib 32.

Here, before the details of the frame chassis 30 are explained, the front pillar 50 and the rear pillar 60 are explained. The front pillar 50 is formed in a substantially bottomed rectangular tube shape that is open downward with the vertical direction being the axial direction, and extends upward from both end portions in the width direction (left-right direction) of the front end side portion of the frame 30. Thus, the front pillars 50 form a part of the outermost shape on both sides in the width direction of the framework frame 20. Further, a pillar-side inclined surface 50A is formed at one corner portion (specifically, a corner portion disposed on the inner side in the width direction of the frame chassis 30) of the front pillar 50 among the corner portions on the front side. The pillar-side inclined surface 50A is inclined rearward as it goes inward in the width direction of the frame 30 in plan view.

A front fitting portion 51 is formed at the upper end of the front pillar 50. The front fitting portion 51 has a fitting cylinder portion 52, and the fitting cylinder portion 52 is formed in a substantially rectangular cylindrical shape having an axial direction in the vertical direction and protrudes upward from the top wall of the front pillar 50. The outer shape of the fitting tube portion 52 in plan view is set smaller than the outer shape of the front pillar 50, and the interior of the fitting tube portion 52 communicates with the interior of the front pillar 50.

A notch 52A is formed in one of the left and right side walls of the fitting cylinder portion 52 (specifically, the side wall disposed on the inner side in the width direction of the frame 30), and the notch 52A is formed in a substantially semicircular shape that is open upward when viewed from the left-right direction. Further, a hook 52B is formed on the front side of the notch 52A on one of the left and right side walls of the fitting cylinder portion 52, and the hook 52B protrudes inward in the width direction of the frame chassis 30 from this side wall.

Further, a pair of right and left fitting ribs 53 are formed on the front side and the rear side of the fitting cylinder portion 52, respectively. That is, the front fitting portion 51 is formed with 4 fitting ribs 53. The fitting rib 53 protrudes upward from the top wall of the front pillar 50 with the left-right direction as the plate thickness direction, and is connected to the fitting cylinder portion 52. Further, a front surface of one fitting rib 53 (specifically, the fitting rib 53 disposed on the inner side in the width direction of the frame 30) of the pair of fitting ribs 53 disposed on the front side of the fitting cylinder portion 52 is inclined in correspondence to the pillar-side inclined surface 50A of the front pillar 50. Further, a rib inclined surface 53A is formed at an upper end portion of the fitting rib 53, and the rib inclined surface 53A is inclined toward the fitting cylinder portion 52 side as going upward.

A rectangular engagement hole 50B (see fig. 5) is formed through one of the left and right side walls at the lower end portion of the front pillar 50 (specifically, the side wall disposed on the inner side in the width direction of the frame chassis 30). When the frame frames 20 are mounted in a stacked state, the following structure is provided: the front fitting portion 51 of the lower side frame 20 is fitted into the lower end portion of the front pillar 50 of the upper side frame 20, and the lower end of the front pillar 50 of the upper side frame 20 is placed on the ceiling wall of the front pillar 50 of the lower side frame 20. At this time, the hook 52B of the lower chassis 20 is inserted into the engagement hole 50B of the upper chassis 20, and the upper and lower chassis 20 are engaged in the vertical direction (see fig. 9B).

The rear pillar 60 is formed in a substantially bottomed rectangular tube shape that is open downward with the vertical direction being the axial direction, and extends upward from both corners on the rear side of the frame 30. Thus, the rear pillars 60 and the front pillars 50 together form a part of the outermost shape on both sides in the width direction of the framework frame 20. The rear pillars 60 are configured in the same manner as the front pillars 50, except for the pillar-side inclined surfaces 50A of the front pillars 50. That is, the outer shape of the rear pillar 60 is formed in a substantially rectangular shape, and the front pillar 50 and the rear pillar 60 have the same dimensions in the front-rear direction and the left-right direction (thickness direction). The positions of the rear pillars 60 and the front pillars 50 aligned in the front-rear direction in the left-right direction are aligned.

A rear fitting portion 61 is formed at the upper end of the rear pillar 60, and the rear fitting portion 61 is configured similarly to the front fitting portion 51. That is, the rear fitting portion 61 has a fitting tube portion 62 of a substantially rectangular tubular shape protruding upward from the top wall of the rear pillar 60. Further, a substantially semicircular notch 62A that opens upward is formed in one of the left and right side walls of the fitting cylinder 62. Further, a hook 62B protruding inward in the width direction of the frame 30 is formed on one of the left and right side walls of the fitting cylinder portion 62 on the front side of the notch portion 62A. Further, a pair of right and left fitting ribs 63 are formed on the front side and the rear side of the fitting cylinder portion 62, respectively, and a rib inclined surface 63A is formed on the upper end portion of the fitting rib 63.

Further, as in the case of the front pillar 50, one of the left and right side walls at the lower end portion of the rear pillar 60 is formed with a rectangular engagement hole 60B (see fig. 5) therethrough. When the frame frames 20 are mounted in a stacked state, the following structure is provided: the rear fitting portion 61 of the lower frame 20 is fitted into the lower end portion of the rear pillar 60 of the upper frame 20, and the lower end of the rear pillar 60 of the upper frame 20 is placed on the top wall of the rear pillar 60 of the lower frame 20. At this time, the hook 62B of the lower frame 20 is inserted into the engaging hole 60B of the upper frame 20, and the upper and lower frame 20 are engaged in the vertical direction.

Returning to the description of the frame 30, the hollowed-out portions 33 are formed at the side portions on both sides in the width direction of the frame 30 (i.e., the outer circumferential ribs 31 of the side frame portions 30S) at positions between the front pillars 50 and the rear pillars 60. The hollow portion 33 is formed in a concave shape that opens to the outer side in the width direction of the frame chassis 30 and extends in the front-rear direction, and is recessed (recessed) inward in the width direction than the outermost shape in the width direction of the frame chassis 30. That is, the outer circumferential rib 31 constituting the hollow portion 33 is formed in a curved shape so as to be opened to the outside in the width direction of the frame 30. The front opening end of the hollow 33 is connected to the rear surface of the front pillar 50, and the rear opening end of the hollow 33 is connected to the front surface of the rear pillar 60. Thus, the hollow portion 33 extends in the front-rear direction over the entire portion between the front pillar 50 and the rear pillar 60 on both sides in the width direction of the frame 30.

The bottom surface of the hollow portion 33 (i.e., the surface constituting the side surface on both sides in the width direction of the frame 30) is formed as a curved surface 33A, and the curved surface 33A is curved in an arc shape that gently protrudes outward in the width direction of the frame 30 in plan view. Specifically, the curved surface 33A is gently curved so that the front-rear direction center portion of the curved surface 33A becomes the top portion of the curved surface 33A. The front inclined surface 33B and the rear inclined surface 33C, which will be described later, are connected to respective ends of the curved surface 33A in the front-rear direction, but when the ends of the curved surface 33A not including the front inclined surface 33B and the rear inclined surface 33C are taken as references, the top of the curved surface 33A is curved outward in a range of 1mm to 5mm, preferably 1.5mm to 2 mm. The curved surface 33A is disposed at a position shifted inward in the width direction of the frame 30 by substantially the same amount as the thickness dimensions of the front pillar 50 and the rear pillar 60 with respect to the outermost shape on both sides in the width direction of the frame 20. In other words, the front support column 50 and the rear support column 60 are offset outward in the width direction of the frame 30 with respect to the curved surface 33A by an amount substantially equal to the thickness dimension of the front support column 50 and the rear support column 60.

As will be described in detail later, in a state where the frame frames 20 are nested, the lower end side portion of the front pillar 50 of the lower frame 20 is disposed in the front end portion of the hollow portion 33 of the upper frame 20, and is disposed adjacent to the curved surface 33A on the outer side in the width direction of the frame 20 (see fig. 1 and 11). Further, in this state, a rear corner 50C of the front pillar 50 in the lower side frame 20 (specifically, a rear corner disposed on the inner side in the width direction of the frame 30) is configured to abut against the curved surface 33A of the upper side frame 20 (see fig. 11). That is, the top of the curved surface 33A of the upper frame 20 is disposed rearward of the front pillar 50 of the lower frame 20.

The front end side surface of the hollow portion 33 is configured as a front inclined surface 33B, and the front inclined surface 33B extends from the front end of the curved surface 33A to the front side and is connected to the rear surface of the front pillar 50. The front inclined surface 33B is inclined outward in the width direction of the frame 30 toward the front side in plan view. Further, the inclination angle of the front side inclined surface 33B with respect to the left-right direction is set to coincide with the inclination angle of the pillar side inclined surface 50A of the front pillar 50 with respect to the left-right direction. When the frame frames 20 are fitted to each other, the pillar-side inclined surface 50A of the front pillar 50 of the lower frame 20 abuts against the front-side inclined surface 33B of the hollow portion 33 of the upper frame 20 (see fig. 11).

The rear end side surface of the hollow portion 33 is configured as a rear inclined surface 33C, and the rear inclined surface 33C extends rearward from the rear end of the curved surface 33A and is connected to the front surface of the rear pillar 60. The rear inclined surface 33C is inclined outward in the width direction of the frame 20 toward the rear side in plan view.

As shown in fig. 10, the side frame portion 30S of the frame 30 has a first reinforcing portion 34 formed on the outer peripheral portion thereof and extending in the front-rear direction. The first reinforcing portion 34 is raised upward with respect to the frame 30, and is formed in a substantially inverted U-shaped groove shape that opens downward when viewed in the longitudinal direction of the first reinforcing portion 34. The first reinforcing portion 34 is formed continuously with the outer circumferential rib 31 constituting the hollow portion 33. Specifically, the first reinforcing portion 34 includes: an outer reinforcing wall 34A extending upward from an upper end of the outer circumferential rib 31 constituting the hollow portion 33; a top wall 34B extending inward in the width direction of the frame chassis 30 from an upper end portion of the outer reinforcing wall 34A; and an inner reinforcing wall 34C extending downward from a widthwise inner end of the frame chassis 30 in the top wall 34B.

The outer reinforcing wall 34A of the first reinforcing portion 34 is slightly inclined inward in the width direction of the frame chassis 30 toward the upper side. Further, the outer reinforcing wall 34A is formed in a concave shape that opens outward in the width direction of the frame 30 in plan view, corresponding to the shape of the hollow portion 33. That is, the front end portion and the rear end portion of the outer reinforcing wall 34A are inclined in correspondence to the front inclined surface 33B and the rear inclined surface 33C of the hollow portion 33.

The front end of the first reinforcement portion 34 is inclined outward in the width direction of the frame 30 toward the front side in plan view, and is connected to the rear end of the front pillar 50. The rear end portion of the first reinforcing portion 34 is bent outward in the width direction of the frame 20 in a plan view, and is connected to the front end portion of the rear pillar 60.

The side frame part 30S has a second reinforcing part 35 formed at a position adjacent to the inner side in the width direction of the frame 30 with respect to the first reinforcing part 34 and extending in the front-rear direction. The second reinforcing portion 35 is raised downward with respect to the frame 30, and is formed in a substantially U-shaped groove shape that is open upward when viewed in the longitudinal direction of the second reinforcing portion 35. In a cross-sectional view taken from the front-rear direction, the second reinforcing portion 35 is formed continuously with (the inner reinforcing wall 34C of) the first reinforcing portion 34 so that the outer peripheral portion of the side chassis portion 30S is formed in an uneven shape.

The front end of the second reinforcing portion 35 is inclined outward in the width direction of the frame 30 toward the front side in plan view, and is connected to the lower end of the front pillar 50. Further, the position in the front-rear direction in the rear end portion of the second reinforcing portion 35 is set to coincide with the position in the front-rear direction in the rear end portion of the first reinforcing portion 34.

Further, a plurality of (6 positions in the present embodiment) reinforcing ribs 36 are formed in the pair of first reinforcing portions 34 on the back surface of the frame 30. The reinforcing ribs 36 are formed in a substantially triangular plate shape with the plate thickness direction in the front-rear direction, and are arranged at predetermined intervals in the front-rear direction. The reinforcing rib 36 extends downward from the top wall 34B of the first reinforcing portion 34, and connects the top wall 34B, the outer reinforcing wall 34A of the first reinforcing portion 34, and the outer circumferential rib 31 constituting the curved surface 33A (see fig. 10).

A third reinforcing portion 37 extending in the left-right direction is formed on the outer peripheral portion of the rear frame portion 30R of the frame 30. The third reinforcing portion 37 is raised upward with respect to the frame 30, and is formed in a substantially inverted U-shaped groove shape that opens downward when viewed in the longitudinal direction of the third reinforcing portion 37. The outer circumferential rib 31 on the rear side of the frame 30 extends upward to form a rear wall of the third reinforcing portion 37. Both ends in the longitudinal direction of the third reinforcing portion 37 are connected to rear end portions of the pair of left and right rear pillars 60, and the pair of left and right rear pillars 60 are connected by the third reinforcing portion 37.

Further, a pair of right and left coupling ribs 38 extending in the front-rear direction are formed on the upper surface of the frame chassis 30 at positions between the first reinforcing portion 34 and the third reinforcing portion 37. The connecting rib 38 is formed in a substantially rectangular plate shape whose plate thickness direction is the left-right direction, and extends rearward from the rear end portion of the inner reinforcing wall 34C of the first reinforcing portion 34. The rear end of the first reinforcing portion 34 (inner reinforcing wall 34C) and the longitudinal ends of the third reinforcing portion 37 are coupled by coupling ribs 38. Thus, the reinforcing ribs formed by the first reinforcing portion 34 (inner reinforcing wall 34C) and the coupling ribs 38 are formed linearly in the front-rear direction on both sides in the width direction of the frame 30, and are connected to the third reinforcing portion 37.

Further, a pair of left and right side ribs 39R (see fig. 5) extending from the lower end of the rear pillar 60 to the inside in the width direction of the frame 30 are formed on the rear surface of the frame 30. The side rib 39R is formed in a substantially rectangular plate shape whose plate thickness direction is the front-rear direction, and a tip end portion of the side rib 39R is connected to the rear inner circumferential rib 32 of the frame 30. Thus, a reinforcing rib formed of the side rib 39R and the rear inner circumferential rib 32 is formed linearly in the left-right direction at the rear end portion of the frame 30, and couples the pair of left and right rear stays 60.

A plurality of (3 positions in the present embodiment) first sliding projections 40 are formed on the upper surface of the front frame portion 30F of the frame 30 in front of the hole portion 30A, and the first sliding projections 40 are arranged at predetermined intervals in the left-right direction. The first slide protrusion 40 is formed in a substantially triangular shape as viewed from the left-right direction, and extends in the left-right direction. Further, the top of the first slide protrusion 40 is curved in a substantially arc shape protruding upward.

A pair of right and left second slide protrusions 41 may be formed on the upper surface of the side frame portion 30S of the frame 30 at the outer side in the width direction of the frame 30 with respect to the first slide protrusion 40. In the case where the second slide projection 41 is provided, it is formed in a substantially semicircular shape as viewed in the left-right direction and extends in the left-right direction.

(about the case)

As shown in fig. 2, 6, and 7, the case 70 is made of a resin material (polypropylene (PP) in the present embodiment). The case 70 is formed in a substantially rectangular box shape having an upper side opened. Specifically, the case 70 includes: a substantially rectangular plate-shaped bottom wall 70A whose vertical direction is a plate thickness direction and whose horizontal direction is a longitudinal direction; a pair of left and right side walls 70B extending upward from both ends in the width direction (left and right direction) of the bottom wall 70A; a rear wall 70C extending upward from a rear end of the bottom wall 70A; and a front wall 70D extending upward from the front end of the bottom wall 70A.

Further, a pair of left and right projecting portions 71 projecting outward in the width direction of the case 70 are formed at the front end portion of the side wall 70B. That is, a first projecting wall portion 71A that is curved outward in the width direction of the case 70 and a second projecting wall portion 71B that extends forward from the tip end portion of the first projecting wall portion 71A and is connected to both end portions in the width direction of the front wall 70D are formed at the tip end portion of the side wall 70B. The dimension of the case 70 in the left-right direction other than the extension portion 71 is set to be slightly smaller than the distance between the pair of first reinforcing portions 34 of the frame 20 in the left-right direction. The box 70 is housed in the frame 20 so as to be slidable in the front-rear direction. Specifically, the housing 70 is slidable between a housing position (a position shown by a solid line in fig. 2) in which it is housed in the frame chassis 20 and a pulled-out position (a position shown by a two-dot chain line in the lowermost housing 70 in fig. 2) in which it is pulled out to the front side from the housing position.

Further, at the housing position of the housing 70, the extension portion 71 of the housing 70 is disposed adjacent to the front side of the front pillar 50 of the frame chassis 20, and the movement of the housing 70 toward the rear side at the housing position is restricted. In addition, at the housing position of the case 70, the first reinforcing portion 34 of the skeleton frame 20 is disposed adjacent to the widthwise outer side of the lower end portion of the side wall 70B in the case 70. Thus, when the case 70 slides between the housing position and the pulled-out position, the first reinforcing portion 34 guides the case 70.

In the accommodated state of the case 70 in the skeletal frame 20, the height of the case 70 is set so that the open end surface (upper end surface) of the case 70 coincides with the vertical position of the lower end surface of (the outer circumferential rib 31 of) the skeletal frame 20 disposed above the case 70 (see fig. 10).

Further, in the disassembled state of the storage box 10, the boxes 70 are configured to be nestable so that the boxes 70 are stacked one on top of another. That is, the side wall 70B, the rear wall 70C, and the front wall 70D of the case 70 are inclined downward toward the inside of the case 70. The inclination angle of the side wall 70B with respect to the vertical direction is set larger than the inclination angle of the second projecting wall portion 71B with respect to the vertical direction. Therefore, in a state where the case 70 is housed in the frame chassis 20, the side surface of the case 70 (the side surface of the second projecting wall portion 71B) is arranged substantially in the vertical direction as viewed from the front. The inclination angle of the front wall 70D with respect to the vertical direction is set smaller than the inclination angle of the rear wall 70C with respect to the vertical direction. This structure is configured as follows: the nesting of the cases 70 can be performed, and the design of the storage box 10 in a front view in a state where the cases 70 are stored in the frame chassis 20 can be improved.

The bottom wall 70A of the case 70 is formed with a narrowed portion 72 that bulges upward, and the narrowed portion 72 is formed in a substantially rectangular shape whose longitudinal direction is the left-right direction in plan view. A plurality of (3 in the present embodiment) first sliding ribs 73 are formed on the lower surface of the bottom wall 70A at the locations where the narrowed portions 72 are formed. The first slide rib 73 extends in the front-rear direction and is disposed at a position corresponding to the first slide protrusion 40 of the frame chassis 20. The lower end of the first slide rib 73 protrudes slightly below the lower surface of the bottom wall 70A. When the box body 70 slides in the front-rear direction, the lower end portion of the first slide rib 73 slides on the first slide protrusion 40 of the frame 20.

Further, a pair of right and left second slide ribs 74 are formed on the lower surface of the bottom wall 70A on the outer side in the width direction of the case 70 with respect to the narrowed portion 72. The second slide rib 74 extends in the front-rear direction and is disposed at a position corresponding to the second slide projection 41 of the frame 20. The rear end portion of the second slide rib 74 protrudes slightly downward from the other portion of the second slide rib 74, and the lower end portion of the rear end portion of the second slide rib 74 is formed in a substantially arc shape that protrudes downward when viewed from the left-right direction. Further, at the housing position of the box body 70, the front end portion of the second slide rib 74 is placed on the second slide projection 41 of the frame chassis 20, and the rear end portion of the second slide rib 74 is placed on the upper surface of the frame chassis 30 (side chassis portion 30S) in the frame chassis 20. When the box 70 slides in the front-rear direction, the lower end of the second slide rib 74 slides on the second slide protrusion 41 of the frame 20.

A pair of left and right stoppers 75 are formed at the rear end of the bottom wall 70A of the case 70. The stopper 75 protrudes downward from the bottom wall 70A and is disposed in the hole 30A of the frame chassis 20. The stopper 75 is formed in a substantially U-shaped plate shape that is open to the rear side in a bottom view when viewed from the lower side. When the box body 70 is pulled out to the pulled-out position, the front surface of the stopper 75 abuts against the front inner circumferential rib 32 in the hole portion 30A of the frame chassis 20. This restricts the movement of the case 70 to the front side at the pulled-out position.

A pair of left and right leg pieces 76 are formed at both ends in the width direction at the upper end portion of the rear wall 70C of the case 70. The leg pieces 76 are formed in a substantially rectangular plate shape extending in the vertical direction with the lateral direction being the plate thickness direction, and project rearward from the rear wall 70C. In a state where the cases 70 are nested with each other, the lower end of the leg piece 76 of the upper case 70 is placed on the opening end face of the lower case 70.

A base portion 77 is formed at a lower end portion of the first projecting wall portion 71A in the side wall 70B of the case 70. The base portion 77 extends upward from the bottom wall 70A, and is formed in a concave shape open to the rear side and the lower side. A base rib 77A is formed inside the base portion 77, and the base rib 77A is formed in a plate shape having a plate thickness direction in the left-right direction and extends in the up-down direction. In a state where the cases 70 are nested with each other, the lower end of the base portion 77 (base rib 77A) of the upper case 70 is placed on the upper end surface of the base portion 77.

In the front wall 70D of the case 70, a recess 78 bulging rearward is formed in a portion other than both end portions in the width direction of the front wall 70D, and the recess 78 is open to the front side and the lower side. Further, a handle piece 79 protruding downward is formed on the front wall 70D on the front side of the upper end portion of the recess 78. The handle piece 79 is formed in a substantially elongated plate shape extending in the left-right direction with the front-rear direction being the plate thickness direction, and is disposed apart from the upper end portion of the recess 78 on the front side. Thereby, a space is formed between the handle piece 79 and the upper end portion of the recess 78. Further, the structure is: the user grips the grip piece 79 to slide the case 70 back and forth.

(related to the roof)

As shown in fig. 2 and 8, the top plate 80 is formed in a substantially rectangular plate shape whose vertical direction is a plate thickness direction and whose horizontal direction is a longitudinal direction. Further, an outer peripheral wall 81 that is curved downward is formed on the outer peripheral edge of the top plate 80, and the outer peripheral wall 81 is formed over the entire circumference of the top plate 80. A pair of left and right first ribs 82 extending in the front-rear direction are formed on the lower surface of the top plate 80 at both ends in the width direction (left-right direction). The first rib 82 is formed in a long plate shape with the thickness direction being the left-right direction, and both ends in the longitudinal direction of the first rib 82 are connected to the outer peripheral wall 81. In addition, 3 second ribs 83 extending in the left-right direction are formed on the lower surface of the top plate 80. The second rib 83 is formed in a long plate shape with the plate thickness direction in the front-rear direction, and both longitudinal end portions of the second rib 83 are connected to the outer peripheral wall 81.

The second rib 83 is disposed at the rear end of the top plate 80 at position 1. Thus, a rear-side fitting portion 84 including the outer peripheral wall 81, the first rib 82, and the second rib 83 is formed at a rear-side corner of the top plate 80, and the rear-side fitting portion 84 is formed in a substantially rectangular cylindrical shape. The rear-side fitting portion 84 is formed corresponding to the rear fitting portion 61 of the frame 20, and the rear fitting portion 61 is fitted into the rear-side fitting portion 84, whereby the top plate 80 is attached to the uppermost frame 20. Further, an engagement hole 85 into which the hook 52B of the frame chassis 20 is inserted is formed through the first rib 82 in the rear-side fitting portion 84.

In addition, the second ribs 83 are arranged at 2 positions apart in the front-rear direction at the portion on the front end side of the top plate 80. Thus, front fitting portions 86 each including the outer peripheral wall 81, the first rib 82, and the 2 nd second rib 83 are formed at both ends in the width direction in the front end portion of the top plate 80, and the front fitting portions 86 are formed in a substantially rectangular cylindrical shape. The front-side fitting portion 86 is formed corresponding to the front fitting portion 51 of the frame 20, and the front fitting portion 51 is fitted into the front-side fitting portion 86, whereby the top plate 80 is attached to the uppermost frame 20 (see fig. 9 a). Further, an engagement hole 87 into which the hook 52B of the frame chassis 20 is inserted is formed through the first rib 82 of the front side fitting portion 86.

In addition, in a state where the top plate 80 is attached to the uppermost frame 20, the extension lengths of the outer peripheral wall 81, the first rib 82, and the second rib 83 from the top plate 80 are set so that the lower end surface of the top plate 80 (the lower end surface of the outer peripheral wall 81, the first rib 82, and the second rib 83) and the upper and lower positions of the opening end surface (the upper end surface) of the box 70 disposed on the uppermost layer coincide with each other. That is, the lower end surface of the outer peripheral wall 81 of the top plate 80 is disposed flush with the opening end surface of the casing 70 disposed on the uppermost layer (see fig. 10).

(Effect)

Next, the operation and effect of the present embodiment will be described while describing the process of nesting the skeleton frames 20 and the bundle package form of the storage box 10 in the disassembled state of the storage box 10.

(nesting of frame)

When a plurality of the framework racks 20 are nested, another framework rack 20 is disposed on the upper side of one framework rack 20. At this time, the upper frame 20 is disposed so as to be shifted to the front side by the dimension in the front-rear direction of the front pillar 50 (rear pillar 60) with respect to the lower frame 20. Thus, the front pillar 50 of the lower framework chassis 20 is disposed so as to overlap the front end portion of the hollow portion 33 of the upper framework chassis 20 in a plan view. In this state, the upper frame 20 is moved downward, and the upper end of the front pillar 50 of the lower frame 20 is inserted into the front end of the hollow portion 33 of the upper frame 20. Then, the upper frame 20 is further moved downward, and the lower end of the hollow portion 33 (outer circumferential rib 31) of the upper frame 20 is placed on the top wall 34B of the first reinforcing portion 34 of the lower frame 20. Thus, as shown in fig. 1 and 11, the nesting of the skeleton frames 20 is completed.

In the state where the frame frames 20 are nested, the front pillars 50 of the upper frame 20 are disposed adjacent to the front sides of the front pillars 50 of the lower frame 20. Further, in this state, the curved surface 33A of the upper frame 20 abuts against the corner portion 50C on the rear side of the front pillar 50 of the lower frame 20 (specifically, the boundary portion between the side surface of the front pillar 50 and the corner portion 50C).

(bundle package shape of storage case)

Next, a bundle form of the storage box 10 at the time of conveyance or the like will be described. In the present embodiment, the storage box 10 is configured by stacking the skeleton frames 20 into 3 layers, but the description will be given of the bundle package configuration of the storage box 10 configured by stacking the skeleton frames 20 into 4 layers, 5 layers, and 6 layers.

As shown in fig. 12 (a), in a bundle state of the 3- tier storage box 10, 3 framework frames 20 are nested one above another in the aforementioned procedure. In addition, 3 cases 70 are nested one above the other. Then, the 3-layered nested cases 70 are housed in the uppermost frame 20 after nesting. Further, a top plate 80 is placed on the opening end surface of the uppermost case 70 after the nesting. As described above, the bundle formation of the 3-tier storage box 10 is the form shown in fig. 12 (a).

As shown in fig. 12 (B), in the bundle state of the 4-tier storage box 10, the 2 framework frames 20 are nested one above the other in the aforementioned procedure. In addition, 4 cases 70 are nested one above the other. Then, the box 70 nested in 4 layers is housed in the uppermost frame 20 after nesting.

In this state, 1 of the remaining skeleton frames 20 is turned up and down and placed on the uppermost box 70. Specifically, the top wall 34B of the first reinforcing portion 34 of the skeletal frame 20 is placed on the opening end face of the uppermost case 70 while the nested cases 70 are inserted into the skeletal frame 20. In this state, the framework frame 20 is placed on the box body 70 such that the front pillar 50 of the framework frame 20 placed on the box body 70 is disposed at a position close to the rear side with respect to the front pillar 50 of the framework frame 20 disposed at the lowermost layer.

Then, the remaining framework frames 20 are turned up and down and are nested into the framework frames 20 placed on the box 70. Specifically, the remaining framework frames 20 are nested with respect to the framework frames 20 placed on the box body 70 while being shifted rearward by the dimension of the front pillar 50 in the front-rear direction. Further, the top plate 80 is placed on the uppermost skeletal frame 20 after the nesting. As described above, the bundle formation of the 4-layered storage box 10 is the form shown in fig. 12 (B).

That is, in the bundle state of the 4-tier storage box 10, the skeleton frame 20 nested by 2 tiers, the box body 70 nested by 4 tiers, the skeleton frame 20 nested by 2 tiers in a state of being turned upside down, and the top plate 80 are stacked in this order from below.

As shown in fig. 13 (a), in the bundle state of the 5-tier storage boxes 10, the same procedure as in the bundle state of the 4-tier storage boxes 10 is performed, but the number of nested layers of the lower side skeleton frame 20 for placing the 5-tier nested boxes 70 is 3. That is, in the case of a bundle of 5-tier containers 10, the skeleton frame 20 nested in 3 tiers, the box body 70 nested in 5 tiers, the skeleton frame 20 nested in 2 tiers in a vertically inverted state, and the top plate 80 are stacked in this order from below.

As shown in fig. 13 (B), in the bundle state of the 6-tier storage boxes 10, the same procedure as in the bundle state of the 5-tier storage boxes 10 is performed, but the number of nested layers of the skeletal frames 20 placed on the upper side of the 6-tier nested box body 70 is 3. That is, in the bundle state of the 6-tier storage box 10, the skeleton frame 20 nested by 3 tiers, the box body 70 nested by 6 tiers, the skeleton frame 20 nested by 3 tiers in a state of being turned upside down, and the top plate 80 are stacked in this order from below.

As described above, the storage box 10 is configured such that the frame racks 20 are divided into 2 groups in a bundle state of 4 or more layers, and the nested box bodies 70 are sandwiched from above and below by the frame racks 20 in the divided nested state. Therefore, compared to a bundle configuration in a nested state in which the skeleton frame 20 is not divided into 2 groups, the increase in the bundle space in the front-rear direction in the storage box 10 can be suppressed.

Here, with respect to the frame chassis 20 of the container box 10, the frame chassis 30 constituting the bottom of the frame chassis 20 is integrally formed with the front pillar 50 and the rear pillar 60. Therefore, the frame 30, the front pillar 50, and the rear pillar 60 need not be attached to the container box 10 during assembly. Thus, the frame 20 can be assembled more easily than when the frame 30 is formed separately from the front pillar 50 and the rear pillar 60.

Further, on both sides in the width direction of the frame chassis 30, hollows 33 are formed which are recessed inward in the width direction than the outermost shape in the width direction of the frame chassis 30, and the hollows 33 are formed in a concave shape which is open outward in the width direction of the frame chassis 30. When the frame frames 20 are nested, the front pillars 50 of the lower frame 20 are disposed inside the hollow portions 33 of the upper frame 20. Thus, even in the frame chassis 20 in which the rear pillars 60 and the front pillars 50 are integrally formed with the frame chassis 30, the frame chassis 20 can be nested in a state of being stacked up and down. Therefore, the space saving of the package form of the storage box 10 can be achieved, and the conveying efficiency of the storage box 10 can be improved.

Further, the hollow portion 33 extends in the front-rear direction over the entire portion between the front pillar 50 and the rear pillar 60 in both side portions in the width direction of the frame 30. Further, the bottom surface of the hollow portion 33 is formed as a curved surface 33A, and the curved surface 33A is curved in an arc shape that gently protrudes outward in the width direction of the frame 30 in plan view. In the nested state of the frame frames 20, the front pillar 50 of the lower frame 20 is disposed inside the front end portion of the hollow portion 33 of the upper frame 20, and the curved surface 33A of the upper frame 20 abuts against the rear corner portion 50C of the front pillar 50 of the lower frame 20. This can improve the design of the storage box 10 and suppress the upper frame 20 from shifting forward relative to the lower frame 20 in the nested state.

That is, from the viewpoint of suppressing the upper frame 20 from shifting forward relative to the lower frame 20 in the nested state, for example, a configuration may be considered in which the dimension in the front-rear direction of the hollow portion 33 of the frame 20 is slightly larger than the dimension in the front-rear direction of the front pillar 50 (hereinafter, this configuration is referred to as "comparative example 1"). In this case, the front pillar 50 of the lower frame 20 is fitted into the hollow portion 33 of the upper frame 20, and the front pillar 50 engages with the hollow portion 33 along the front-rear direction. This can suppress the upper frame 20 from shifting forward relative to the lower frame 20. However, in the configuration of comparative example 1, the hollow portions 33 that are open to the outside in the width direction of the frame 20 are partially formed on both sides in the width direction of the frame 20. Therefore, in comparative example 1, the design of the frame 20 and, in turn, the design of the storage box 10 may be degraded.

On the other hand, for example, in a configuration in which the bottom surface of the hollow portion 33 is formed linearly in the front-rear direction in a plan view (hereinafter, this configuration is referred to as "comparative example 2"), the hollow portion 33 of the upper side frame 20 does not abut on the corner portion 50C of the front pillar 50 of the lower side frame 20 in the nested state of the frame frames 20. Therefore, in the nested state of the frame frames 20, the upper frame 20 is not restricted from moving forward. This makes it easy for the upper frame 20 to be displaced from the lower frame 20, and the bundle state of the storage box 10 may be broken.

In contrast, in the framework frame 20 of the present embodiment, the hollow portion 33 extends in the front-rear direction over the entire portion between the front pillar 50 and the rear pillar 60 at both sides in the width direction of the framework frame 30. Therefore, the formation of the hollow portions 33 that are open to the outside in the width direction of the framework frame 20 can be suppressed in part at both sides in the width direction of the framework frame 20. As a result, not only the design of the frame 20 but also the design of the storage box 10 can be improved as compared with the configuration of comparative example 1.

Further, the bottom surface of the hollow portion 33 is formed as a curved surface 33A, and the curved surface 33A is curved in an arc shape protruding outward in the width direction of the frame 30 in a plan view. In the nested state of the frame frames 20, the curved surface 33A of the upper frame 20 abuts against the corner 50C of the front pillar 50 of the lower frame 20. Thus, in the curved surface 33A of the upper frame 20, a portion between a portion in contact with the front pillar 50 (the corner portion 50C) and a top portion (a front-rear direction center portion) of the curved surface 33A is disposed further outward in the width direction than the corner portion 50C of the front pillar 50 in the lower frame 20. Therefore, when the upper frame 20 is intended to move forward relative to the lower frame 20, the curved surface 33A of the upper frame 20 bites into the corner 50C of the lower front pillar 50. This can suppress the movement of the upper frame 20 to the front side, as compared with the configuration of comparative example 2. As described above, according to the frame 20 of the present embodiment, it is possible to improve the design of the container box 10 and to suppress the upper frame 20 from shifting forward relative to the lower frame 20 in the nested state. Therefore, for example, the bundle state of the storage box 10 can be maintained well.

In addition, the frame chassis 30 is formed in a rectangular frame shape. Thus, the frame 30 can be reduced in weight compared to a configuration in which the hole 30A is not omitted. Further, a first reinforcing portion 34 extending in the front-rear direction is formed in the outer peripheral portion of the side frame portion 30S of the frame 30, and the first reinforcing portion 34 is formed in a groove shape protruding upward of the frame 30 and opening downward. This can improve the bending rigidity of the frame 20 (particularly, the side frame portion 30S) formed in a rectangular frame shape. Therefore, the bending rigidity of the frame 20 can be improved while achieving the weight reduction of the frame 20.

In the accommodated state of the box body 70 in the framework chassis 20, the first reinforcing portion 34 of the framework chassis 20 is disposed adjacent to the lower end portion of the side wall 70B of the box body 70 on the outer side in the width direction of the framework chassis 20. This makes it possible to guide the case 70 during sliding of the case 70 by flexibly applying the first reinforcing portion 34 for improving the bending rigidity of the frame 20.

The front end of the first reinforcing portion 34 is connected to the front pillar 50 so as to be inclined outward in the width direction of the frame 20 toward the front side. Further, the rear end portion of the first reinforcing portion 34 is bent outward in the width direction of the frame 20 and connected to the rear pillar 60. Therefore, the lower end of the rear pillar 60 and the lower end of the front pillar 50 are coupled by the first reinforcement portion 34. Thus, the lower end portions (root portions) of the rear pillars 60 and the front pillars 50 can be reinforced by the first reinforcing portions 34. As a result, for example, the falling down of the rear pillars 60 and the front pillars 50 can be suppressed.

Further, a reinforcing rib 36 is formed inside the first reinforcing portion 34, and the reinforcing rib 36 connects the top wall 34B of the first reinforcing portion 34, the outer reinforcing wall 34A of the first reinforcing portion 34, and the outer circumferential rib 31 constituting the curved surface 33A of the hollow portion 33. Therefore, the outer circumferential rib 31 constituting the curved surface 33A can be reinforced by the reinforcing rib 36. As a result, the outer circumferential rib 31 can be suppressed from being deformed inward in the width direction of the frame 20. This can effectively suppress the upper frame 20 from shifting forward relative to the lower frame 20 in the nested state of the frame 20.

The side frame portion 30S of the frame 30 is formed with a second reinforcing portion 35 extending in the front-rear direction, and the second reinforcing portion 35 is formed in a groove shape protruding toward the lower side of the frame 30 and opening toward the upper side. The second reinforcing portion 35 is disposed adjacent to the first reinforcing portion 34 on the inner side in the width direction of the frame 20, and is formed continuously with the first reinforcing portion 34. Therefore, the outer peripheral portion of the frame 30 (side frame portion 30S) is formed in a concave-convex shape. This can further improve the bending rigidity of the side frame portion 30S of the frame 30.

Further, a third reinforcing portion 37 extending in the left-right direction is formed in the outer peripheral portion of the rear side of the frame chassis 30, and the third reinforcing portion 37 is formed in a groove shape bulging toward the upper side of the frame chassis 30 and opening toward the lower side. Therefore, the bending rigidity of rear frame portion 30R of frame 30 can be improved.

The third reinforcing portion 37 connects lower end portions of the pair of left and right rear pillars 60. Therefore, the lower end portion (root portion) of the rear pillar 60 can be reinforced by the third reinforcement portion 37. This can suppress, for example, the falling of the rear pillars 60.

Further, a coupling rib 38 extending in the front-rear direction is formed on the upper surface of the frame 30, and the coupling rib 38 couples the first reinforcing portion 34 and the third reinforcing portion 37. Specifically, the coupling rib 38 extends rearward from the rear end portion of the inner reinforcing wall 34C of the first reinforcing portion 34, and is connected to the third reinforcing portion 37. Therefore, a reinforcing portion composed of the first reinforcing portion 34, the connecting rib 38, and the third reinforcing portion 37 is continuously formed on the outer peripheral portion of the frame 30, and the reinforcing portion is formed in a substantially U-shape open to the front side in a plan view. Therefore, the bending rigidity of the entire frame 30 can be effectively improved.

Further, a side rib 39R extending from the rear pillar 60 to the inside in the width direction of the frame chassis 30 is formed on the rear surface of the frame chassis 30, and the tip end portion of the side rib 39R is connected to the rear inner circumferential rib 32. Therefore, at the rear end portion of the frame 30, the reinforcing rib formed by the inner circumferential rib 32 and the side rib 39R linearly extends in the left-right direction, and couples the pair of left and right rear pillars 60. Therefore, the bending rigidity of the rear end portion of the frame chassis 30 can be effectively improved, and the falling of the rear pillar 60 can be effectively suppressed.

In the storage box 10, the opening end surface of the box 70 disposed on the uppermost layer and the lower end surface of the top plate 80 are aligned in the vertical position. This can prevent foreign matter from entering the inside of the case 70.

In the storage box 10, the opening end surface of the lower box 70 and the lower end surface of the upper frame 20 are aligned in vertical position. This can prevent foreign matter from entering the inside of the case 70.

In the present embodiment, the hollow portion 33 of the framework frame 20 extends in the front-rear direction over the entire portion between the front pillar 50 and the rear pillar 60, but the hollow portion 33 may be formed locally between the front pillar 50 and the rear pillar 60. For example, the front-rear direction dimension of the hollow portion 33 may be set to be slightly larger than the front-rear direction dimension of the front pillar 50, and the hollow portion 33 may be disposed adjacent to the rear side of the front pillar 50. In this case, in the nested state of the frame frames 20, the front pillar 50 of the lower frame 20 is fitted into the hollow portion 33 of the upper frame 20, and therefore, the upper frame 20 can be prevented from being shifted forward.

In the present embodiment, the frame 30 of the frame 20 is formed in a rectangular frame shape, but the hole 30A and the inner circumferential rib 32 may be omitted from the frame 30, and the frame 30 may be formed in a rectangular plate shape. In this case, a groove-shaped hole into which the stopper 75 of the case 70 is inserted may be formed in the frame chassis 30.

In the present embodiment, the reinforcing rib 36 is configured to connect the ceiling wall 34B of the first reinforcing portion 34, the outer reinforcing wall 34A of the first reinforcing portion 34, and the hollow portion 33 (the outer circumferential rib 31), but the configuration of the reinforcing rib 36 is not limited to this. For example, the inner reinforcing wall 34C, the ceiling wall 34B, the outer reinforcing wall 34A, and the hollow portion 33 (the outer circumferential rib 31) of the first reinforcing portion 34 may be connected by the reinforcing rib 36. This can suppress the outer circumferential rib 31 constituting the curved surface 33A from being deformed inward in the width direction of the frame 20.

In the present embodiment, the front-rear position of the reinforcing rib 36 is not particularly limited, but the front-rear position of the reinforcing rib 36 may be set as follows. That is, the front and rear positions of the reinforcing rib 36 may be set to: when the frame 20 is fitted, one of the reinforcing ribs 36 is disposed at a position corresponding to a portion of the curved surface 33A with which the corner portion 50C of the front pillar 50 abuts. This can further effectively suppress the outer circumferential rib 31 constituting the curved surface 33A from being deformed inward in the width direction of the frame 20 when the frame 20 is fitted.

In the present embodiment, the curved surface 33A of the frame 20 is configured as a surface without irregularities, but a regulating rib or the like extending in the vertical direction may be formed on the curved surface 33A. Specifically, the curved surface 33A may form a restricting rib that abuts against the corner 50C of the front pillar 50 of the lower frame chassis 20 when the frame chassis 20 is nested. This can further suppress the upper frame 20 from shifting forward relative to the lower frame 20 when the frame 20 is nested. When the curved surface 33A is formed as a restricting rib, the bottom surface of the hollow portion 33 may be configured as a surface that is linear in the front-rear direction in a plan view.

Claims (9)

1. A storage box is characterized by comprising:

a framework frame; and

a box body which is formed into a box shape with an upper side opened and is accommodated in the framework frame in a manner of sliding in the front-back direction,

the framework is constructed to include:

a bottom frame for placing the box body;

a pair of rear stays integrally formed with the bottom chassis and protruding upward from both widthwise ends of a rear end of the bottom chassis; and

a pair of front pillars integrally formed with the bottom chassis and protruding upward from both ends in a width direction of a front end side portion of the bottom chassis,

a pair of hollows recessed inward in the width direction from the outermost shape in the width direction of the bottom frame are formed between the front pillar and the rear pillar on both sides in the width direction of the bottom frame,

when the frame frames are nested, the front pillars of the lower frame are disposed inside the hollow portions of the upper frame.

2. The storage case of claim 1,

the hollow portion extends in the front-rear direction over the entire portion between the front pillar and the rear pillar in both side portions in the width direction of the bottom frame,

the bottom surface of the hollow portion is configured as a curved surface protruding outward in the width direction of the bottom frame in a plan view,

when the frame frames are nested, the front pillar of the lower frame is disposed inside the front end portion of the hollow portion of the upper frame, and the curved surface of the upper frame abuts against the rear corner portion of the front pillar of the lower frame.

3. The storage box according to claim 1 or 2,

the bottom frame is formed into a rectangular frame shape,

an outer circumferential rib which is bent downward and forms the hollow portion is formed on the outer circumferential edge of the bottom frame,

a pair of first reinforcing portions extending in the front-rear direction are formed in the outer peripheral portions of both sides of the bottom chassis in the width direction, and the first reinforcing portions are formed in a groove shape that is raised toward the upper side of the bottom chassis and is open toward the lower side.

4. The storage case of claim 3,

the front end portion of the first reinforcement portion is inclined outward in the width direction of the framework frame toward the front side and is connected to the front pillar,

the rear end part of the first reinforcing part bends towards the outer side of the width direction of the framework frame and is connected with the rear support.

5. The storage case of claim 3,

a reinforcing rib that connects the first reinforcing portion and the outer circumferential rib constituting the hollow portion is formed inside the first reinforcing portion.

6. The storage case of claim 3,

a second reinforcing portion extending in the front-rear direction is formed on the bottom frame on the inner side in the width direction of the frame with respect to the first reinforcing portion,

the second reinforcing portion is formed in a groove shape that is raised toward a lower side of the bottom chassis and is open toward an upper side, and is formed continuously with the first reinforcing portion.

7. The storage case of claim 3,

a third reinforcing portion extending in the left-right direction and connecting the pair of rear pillars is formed in an outer peripheral portion of the rear side of the bottom chassis, the third reinforcing portion being formed in a groove shape bulging toward the upper side of the bottom chassis and opening toward the lower side,

a connection rib that connects the first reinforcement portion and the third reinforcement portion is formed in the frame.

8. The storage box according to claim 1 or 2,

a top plate is mounted on the upper end of the front pillar and the upper end of the rear pillar,

the position of the opening end surface of the box body in the vertical direction is consistent with the position of the lower end surface of the top plate arranged on the upper side of the box body in the vertical direction.

9. The storage box according to claim 1 or 2,

a plurality of the framework frames are arranged in a vertically stacked state,

the vertical position of the opening end surface of the box body is consistent with the vertical position of the lower end surface of the framework frame arranged on the upper side of the box body.

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