JP5649124B2 - Folding container - Google Patents

Description

  In the present invention, a pair of first side walls disposed on a pair of opposite sides of the bottom wall and a pair of second side walls disposed on the remaining pair of opposite sides rotate around a lower end portion. In this regard, the present invention relates to a folding container that is stacked on the bottom wall in the order of the first and second side walls, is in a folded state, and can be loaded and unloaded from the side.

  As a conventional folding container, a side wall support protruding wall is erected from the entire outer edge portion of the bottom wall, and the first and second side walls are rotatably supported by the side wall support protruding wall. (For example, refer to Patent Document 1). In such a folding container, in order to enable loading / unloading of the luggage from the side, if the structure is simply provided with a side wall opening for loading / unloading the luggage on the first side wall, the side wall supporting the first side wall The support wall becomes an obstacle, and the luggage cannot be easily removed from the side. In order to solve this problem, the folding container that pivotally connects the side wall support projecting wall that supports the first side wall to the bottom wall, and allows the side wall support projecting wall to fall outward together with the first side wall so that the entire side surface can be opened. Is known (see, for example, Patent Document 2).

JP 2005-350108 A (FIGS. 1 to 4) JP 2006-51966 A (FIGS. 1, 15, and 16)

  However, in the above-described conventional folding container, when the first side wall and the side wall support projecting wall are tilted outward, the supporting strength of the pair of second side walls supported by them decreases, and the second side wall For example, a situation may occur in which deformation occurs due to a load received from a luggage or the like.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a folding container that can easily take in and out a load from the side and has higher strength than conventional ones.

In order to achieve the above object, a folding container according to the invention of claim 1 includes a pair of first side walls disposed on a pair of opposite sides of a bottom wall having a quadrangular shape, and a remaining pair of pairs. In a folding container in which a pair of second side walls arranged on opposite sides rotate around a lower end and are overlapped on the bottom wall in the order of the first and second side walls and in a folded state , Provided on the outer edge portion of the bottom wall where the second side wall is disposed, projecting upward from the upper surface of the bottom wall and rotatably supporting the second side wall, and from the lower end of the first side wall A hinge side wall protrusion projecting inward and an outer edge of the bottom wall on which the first side wall is disposed, and a part of the upper surface of the bottom wall is depressed or a part of the bottom wall is cut off. A hinge bottom wall recess that receives the lower end of the first side wall including the hinge side wall protrusion, and a tip and bottom wall of the hinge side wall protrusion. A first side wall rotation coupling mechanism that is pivotably connected, a side wall opening that is formed through the first side wall so as to allow loading and unloading of a luggage container, and a side door that opens and closes the side wall opening. It is characterized by the provision.

  According to a second aspect of the present invention, in the folding container according to the first aspect, a door hinge side wall recess is formed in the lower end portion of the first side wall and is opened to the outer surface and the lower end inner surface of the side wall opening. A pivot relay member having a lower end received in the side wall recess and an upper end projecting upward from the door hinge sidewall recess is rotatably connected to the first sidewall. On the other hand, the rotation relay member is characterized in that the upper end of the rotation relay member is rotatably connected to the lower end of the side door.

  According to a third aspect of the present invention, in the folding container according to the first aspect, a side wall recessed portion for a door hinge that is open to an outer surface of the first side wall and an inner surface of the lower end of the side wall opening is formed at the lower end of the first side wall. It is characterized in that the lower end portion is received in the door hinge side wall recess and is pivotally connected to the first side wall.

  According to a fourth aspect of the present invention, in the folding container according to any one of the first to third aspects, the upper surface of the hinge side wall protrusion, the lower end inner surface of the side wall opening, and the hinge bottom wall recess are excluded. It is characterized in that the top surface of the bottom wall main body is disposed substantially flush.

[Invention of Claim 1]
In the folding container according to claim 1, the hinge side wall protrusion protruding inward from the lower end of the first side wall is received in the hinge bottom wall recess of the bottom wall, and the tip of the hinge side wall protrusion is formed on the bottom wall. Since the first side wall is turned inside the folding container, the lower end of the first side wall other than the hinge side wall protrusion is detached from the hinge bottom wall recess, One entire side wall is superimposed on the bottom wall. That is, according to the configuration of claim 1, the conventional side wall supporting protrusion for the first side wall can be eliminated from the folding container, and when loading and unloading the luggage from the side through the side wall opening of the first side wall, The side wall support protruding wall will not become an obstacle. Moreover, the lower end inner surface of the side wall opening can be arranged at a position that is flush with or slightly different from the upper surface of the bottom wall body excluding the bottom wall recess for hinges, It is also possible to easily take in and out the luggage while dragging the luggage across the upper surface of the bottom wall body. Moreover, in the folding container according to the present invention, the luggage can be taken in and out from the side while keeping the first side wall in an upright state, so that the luggage can be taken in and out from the side unless the first side wall is tilted outward. Strength is higher than conventional folding containers that cannot. That is, according to the present invention, it is possible to provide a folding container that can easily take in and out a load from the side and has higher strength than the conventional one.

  The side door that opens and closes the side wall opening may be connected to the first side wall so as to be pivotable, may be slidably connected, and may be detachably attached. . In addition, when the side door can be rotated, the side door may be connected to any one of the upper end portion, the side portion, and the lower end portion of the side wall opening so as to be rotatable.

[Invention of claim 2]
In the folding container according to the second aspect, the side door can be rotated and opened together with the rotation relay member to a substantially horizontal position around the lower end portion of the rotation relay member. At this time, the rotation relay member protrudes outward from the door hinge side wall recess opened to the outer surface of the lower end portion of the first side wall and the lower end inner surface of the side wall opening. Then, by rotating the side door downward with respect to the rotation relay member in a substantially horizontal posture, the side door is suspended from the portion of the rotation relay member that protrudes outside the first side wall. Can do. As a result, when a plurality of folding containers are stacked, the side doors of the upper folding container can be suspended vertically downward without interfering with the lower folding container, and the side doors do not get in the way. In addition, it is possible to easily take in and out luggage from the side.

[Invention of claim 3]
In the folding container according to the third aspect, the side door can be rotated and opened about the lower end portion thereof to a position where the side door is in a substantially horizontal posture. At this time, the side door protrudes outward from the door hinge side wall recess opened to the outer surface of the lower end portion of the first side wall and the lower end inner surface of the side wall opening, and the side door protrudes from the lower end inner surface of the side wall opening. Can be suppressed. Thereby, it becomes possible to easily take in and out the luggage from the side in the folding container.

[Invention of claim 4]
In the folding container according to claim 4, the upper surface of the hinge side wall protrusion, the inner surface of the lower end of the side wall opening of the first side wall, and the upper surface of the bottom wall main body are arranged flush with each other. It is also possible to easily take in and out the luggage while dragging the luggage across a plurality of surfaces.

The perspective view of the folding container which concerns on 1st Embodiment of this invention. The perspective view of the folding container of the state which folded the 1st side wall of one side Perspective view of the folded container in the folded state Bottom perspective view of folding container Perspective view of the bottom base Perspective view of one end of the lower end base Perspective view of second side wall Perspective view of top door Perspective view of folding container with side door open The perspective view of the component of the 1st side wall The perspective view of the component of the 1st side wall, and the one end part of a lower end base The perspective view of the connection part of the 1st side wall and bottom wall of a folding state The perspective view of the connection part of the 1st side wall and the bottom wall of the state which the side door closed The perspective view of the connection part of the 1st side wall and the bottom wall of the state which the side door opened horizontally The perspective view of the connection part of the 1st side wall and the bottom wall of the state which the side door suspended below Rear side perspective view of first side wall and side door Partially broken perspective view of a fitting portion between the first side wall and the side door Partially broken perspective view of a fitting portion between the first side wall and the side door Perspective view of the rear side of the rotation relay member and slide regulating member (A) Rear side perspective view of assembled state of rotation relay member and slide restricting member, (B) Front perspective view of assembled state of rotation relay member and slide restricting member The perspective view of the folding container from which the rotation relay member and the slide regulating member are removed Perspective view of the folding container with the slide regulating member removed Perspective view of folding container with side door half open Perspective view of the folding container with the side door open horizontally Perspective view of folding container with side door hanging The perspective view of the 1st side wall and lower end base of a folded state Perspective view of multiple folded containers The perspective view of the engaging part of the stacked folding containers The perspective view of the 1st side wall main body and the side door in the folding container of 2nd Embodiment. The perspective view of the connection part of the side door of a closed state, and the 1st side wall The perspective view of the connection part of the 1st side wall and the bottom wall of the state which the side door opened horizontally

[First Embodiment]
Hereinafter, an embodiment of the present invention will be described with reference to FIGS. The folding container 10 of the present embodiment shown in FIG. 1 has a rectangular parallelepiped shape in plan view, and a pair of first side walls 30 and 30 according to the present invention are arranged on a pair of short sides of the rectangle. On the other hand, a pair of second side walls 70, 70 according to the present invention are disposed on the pair of long side portions. Further, the lower end portions of the first and second side walls 30 and 70 are rotatably connected to the lower end base 11 constituting the bottom portion of the folding container 10. Further, upper doors 80 and 80 are rotatably connected to upper ends of the pair of second side walls 70 and 70. Then, as shown in FIG. 2, the lower end base 11 has the pair of first side walls 30, 30 inward with the top doors 80, 80 opened so as to overlap the outer surface of the second side wall 70. After overlapping on the bottom wall 15, the entire folding container 10 is folded by overlapping a pair of second side walls 70, 70 on the pair of first side walls 30, 30, as shown in FIG. Can be in a state. Further, the folding container 10 can be put into an assembled state by rotating the first and second side walls 30 and 70 in the reverse order of the folding operation described above.

  Hereinafter, the detailed structure of each part, such as the said lower end base 11 and the 1st side wall 30 which comprise the folding container 10, is described. First, the lower end base 11 will be described. As shown in FIG. 5, the lower end base 11 has a rectangular groove structure in which a pair of side wall support projecting walls 12, 12 project upward from a pair of long side portions at the outer edge of the rectangular bottom wall 15. .

  Each side wall support protruding wall 12 is provided with a plurality of arm receiving portions 14 arranged in the longitudinal direction. As shown in an enlarged view in FIG. 6, each arm receiving portion 14 opens in the upper surface and the inner side surface of the side wall support projecting wall 12 and extends in the vertical direction, and includes a step surface 14 </ b> D near the upper end. ing. The lower side of the step surface 14D of the arm receiving portion 14 is a receiving main body portion 14S that is narrower than the upper side. In the receiving main body portion 14S, the inside of the arm receiving portion 14 is the side surface of the arm receiving portion 14. It is wider than the opening 14 </ b> B (opening on the inner side surface of the side wall supporting protruding wall 12). Further, at the upper end portion in the receiving main body portion 14S, retaining projections 14T and 14T are formed to protrude from both side opening edges of the side surface opening 14B. These retaining protrusions 14T have a substantially triangular shape in which the protruding amount from the opening edge of the side surface opening 14B increases as it goes downward.

  As shown in FIG. 4, a lattice-like lower surface rib 15 </ b> L is formed on the entire bottom surface of the bottom wall 15. Further, first lower surface recesses 15 </ b> D and 15 </ b> D are formed in a pair of long side portions on the lower surface outer edge portion of the bottom wall 15. Each of the first lower surface recesses 15 </ b> D is formed to be depressed in the whole except for both ends of the long side portion at the outer edge of the lower surface of the bottom wall 15, and is open to the lower surface and the side surface of the bottom wall 15. Then, as shown in FIG. 27, when the folding containers 10 and 10 are stacked, the door support 74 group described later of the lower folding container 10 is a first lower surface recess 15D in the upper folding container 10. Fits in 15D. In addition, a pair of second lower surface recesses 15 </ b> C and 15 </ b> C are provided in a pair of short side portions at the lower surface outer edge portion of the bottom wall 15. Each of the second lower surface recesses 15 </ b> C is recessed at two locations on the lower surface outer edge portion on the short side of the bottom wall 15, and is open to the lower surface and the side surface of the bottom wall 15. As shown in FIG. 27, when the folding containers 10 and 10 are stacked, a door penetration protrusion 30 </ b> T (described later) of the lower folding container 10 is formed in the second lower surface recess 15 </ b> C in the upper folding container 10. It will fit.

  As shown in FIG. 5, hinge bottom wall recesses 20, 20 are recessed at both ends of the bottom wall 15 in the longitudinal direction. Further, the upper surface 15S of the bottom wall body 15H excluding the hinge bottom wall recess 20 in the bottom wall 15 (hereinafter, simply referred to as “the upper surface 15S of the bottom wall 15” as appropriate) is a flat surface as a whole.

  As shown in FIG. 6, from the step surface 20D between the hinge bottom wall recess 20 and the bottom wall main body 15H, the center step protrusion 21 and the side step protrusions 22 and 22 are directed toward the hinge bottom wall recess 20. It protrudes. The side step protrusions 22 are arranged at both ends in the lateral direction of the step surface 20D (only one side step protrusion 22 is shown in FIG. 6), and is integrated with the inner surface of the side wall support protrusion wall 12. The upper surfaces of the side step protrusions 22 and 22 are flush with the upper surface 15S of the bottom wall 15.

  The central step protrusion 21 is disposed at the center in the lateral direction of the step surface 20D, and has a rectangular parallelepiped shape that extends in the lateral direction of the step surface 20D. The upper surface of the central step protrusion 21 is the upper surface 15S of the bottom wall 15. It has become the same. At both ends in the longitudinal direction of the central step projection 21, projection receiving grooves 21 </ b> A are formed so as to open to the longitudinal end face and the upper surface of the central step projection 21. Then, the rotation engaging portion 23 is formed on the step surface 20D side from the protrusion receiving groove 21A at both ends of the central step protrusion 21 while the movement restricting wall 21B is on the side farther from the step surface 20D than the protrusion receiving groove 21A. Is formed. Further, a rotation engaging portion 23 having the same shape as the rotation engaging portion 23 of the central step protrusion 21 is also formed adjacent to each side step protrusion 22.

  As shown in FIG. 11, the rotation engagement portion 23 has a structure in which a locking projection 23 </ b> A and a reinforcement projection 23 </ b> B protruding from the step surface 20 </ b> D of the hinge bottom wall recess 20 are arranged vertically. The locking projection 23A protrudes from the step surface 20D larger than the reinforcing projection 23B, and the lower surface of the locking projection 23A is a flat surface orthogonal to the step surface 20D. Further, the upper end corner portion on the side away from the step surface 20D in the locking projection 23A is chamfered and inclined. On the other hand, the reinforcing protrusion 23B has a flat surface extending from the lower surface of the locking protrusion 23A to the bottom surface of the hinge bottom wall recess 20, and the flat surface gradually approaches the step surface 20D as it goes downward. So as to be inclined. Further, the movement restricting wall 21 </ b> B has a prismatic shape standing from the bottom surface of the hinge bottom wall recess 20.

  As shown in FIG. 6, a pair of bottom hoods 24 and 24 bulge upward from two positions at the end of the bottom surface of the hinge bottom wall recess 20 on the side away from the step surface 20D. The lower side of the bottom hood 24 is the above-described second lower surface recess 15 </ b> C, and the upper surface of the bottom hood 24 is lower than the upper surface 15 </ b> S of the bottom wall 15.

  Next, the second side wall 70 will be described. As shown in FIG. 7, the second side wall 70 has a horizontally long rectangle as a whole and includes lattice-shaped reinforcing ribs 70 </ b> L on the outer surface. Hereinafter, unless otherwise specified, the vertical direction, the upper end, the lower end, and the like of the second side wall 70 indicate the vertical direction, the upper end, the lower end, and the like of the second side wall 70 when the second side wall 70 is in the standing posture. And The same applies to the first side wall 30 and the side door 40 described later.

  From the lower end portion of the second side wall 70, a plurality of hinge arms 71 corresponding to the arm receiving portion 14 (see FIG. 5) extend vertically downward. Further, the hinge arm 71 has a stepped shape on the lower side from the upper end position corresponding to the shape of the arm receiving portion 14 described above, and has a narrow width. The narrow portion 71A of the hinge arm 71 has substantially the same width as the receiving main body portion 14S of the arm receiving portion 14, and the rotation center protrusions 71T and 71T are formed on both sides from both side surfaces of the lower end portion of the narrow portion 71A. Protruding. As shown in FIG. 2, the narrow portion 71A of the hinge arm 71 is received by the receiving body portion 14S of the arm receiving portion 14, and the rotation center protrusions 71T, 71T are the retaining protrusions 14T, 14T (FIG. 6). (See below). Thereby, the second side wall 70 rotates with respect to the lower end base 11 around the lower end portion of the hinge arm 71.

  As shown in FIG. 2, the second side wall 70 is provided with rotation restricting protrusions 72 and 72 at the upper end portions at both end edges in the longitudinal direction. The rotation restricting projecting piece 72 protrudes perpendicularly from the inner surface of the second side wall 70 and has a vertically long rectangle. Further, an inner engagement recess 72B is formed on the inner surface of the rotation restricting protrusion 72 by recessing the central portion in the vertical direction in a stepped shape. Furthermore, rectangular engagement holes 72A and 72A are formed through both ends of the rotation restricting protrusion 72 in the vertical direction.

  Elastic engagement pieces 73 and 73 are provided at positions close to both ends in the longitudinal direction of the second side wall 70 at the same height as the above-described inner engagement recess 72B. The elastic engagement piece 73 is formed by forming a “U” -shaped slit in the second side wall 70 and separating a part of the second side wall 70 into a cantilever shape extending in the horizontal direction. Further, an engaging protrusion 73T protrudes from the tip of the elastic engaging piece 73 toward the inside of the folding container 10. The engaging protrusion 73 </ b> T gradually protrudes from the inner surface of the second side wall 70 toward the rotation restricting protrusion 72 and has a triangular shape with a flat surface facing the rotation restricting protrusion 72.

  As shown in FIG. 7, a plurality of door support portions 74 protrude from the upper end portion of the second side wall 70. A vertically long shaft receiving groove 74J is formed on the facing surface between the adjacent door support portions 74, 74.

  Next, the upper surface door 80 will be described. As shown in FIG. 8, a plurality of hinge engaging protrusions 81 are provided on one outer edge portion of the upper surface door 80 corresponding to the door support portion 74 group of the second side wall 70. In addition, hinge shafts 81 </ b> J protrude from both side surfaces of each hinge engaging protrusion 81. As shown in FIG. 1, the hinge engaging protrusion 81 of the upper surface door 80 is disposed between the adjacent door support portions 74, 74, and the hinge shaft 81 </ b> J of each hinge engaging protrusion 81 is a door. The upper surface door 80 is received by the shaft receiving groove 74 </ b> J of the support portion 74, so that the upper surface door 80 is rotatably connected to the upper end portions of the second side walls 70.

  The entire length of the upper surface door 80 in the direction of the rotation center axis is substantially the same as the entire length of the second side wall 70. When the upper surface door 80 is closed as shown in FIG. Overlaid on the upper surfaces of the first side walls 30, 30. A pair of door through-holes 82 and 82 are formed through both ends of the upper surface door 80. A door penetration protrusion 30T, which will be described later, protrudes from the upper surface of the first side wall 30 so as to penetrate each door penetration hole 82.

  As shown in FIG. 8, a plurality of door tip protrusions 83 and door tip recesses 84 are alternately arranged at the distal end portion of the upper surface door 80 away from the rotation center. Further, a back side support wall 85 is provided on the back side of the middle part in the depth direction of each door front end recess 84. Each of these back-side support walls 85 is disposed at a position recessed from the outer surface of the door tip protrusion 83. As shown in FIG. 1, when the pair of upper surface doors 80, 80 are closed, the door front end protrusion 83 of the other upper surface door 80 is accommodated in the door front end recessed portion 84 of the one upper surface door 80, and one upper surface On the back support wall 85 of the door 80, the door tip protrusion 83 of the other upper surface door 80 is overlapped.

  Next, the first side wall 30 will be described. As shown in FIG. 9, the first side wall 30 includes a side wall opening 30 </ b> W for taking in and out the luggage from the folding container 10, and the side wall opening 30 </ b> W is opened and closed by the side door 40. Here, with respect to the components of the first side wall 30 described below (the first side wall main body 30H, the side door 40, etc.), the direction passing through the side wall opening 30W is referred to as the “front-rear direction”. The side toward the inner side of the tatami container 10 is referred to as “rear side”, and the opposite side, that is, the side toward the outer side of the foldable container 10 is referred to as “front side”.

  As shown in FIG. 10, the first side wall 30 includes a frame-shaped first side wall main body 30 </ b> H whose inside is the side wall opening 30 </ b> W described above. Of the parts constituting the four sides of the frame of the first side wall body 30H, the bottom side constituting wall 38 constituting the bottom side is wider in the front-rear direction of the first side wall body 30H than the parts constituting the other sides. Yes. And the rear-end part of the base side structure wall 38 protrudes back from the rear surface of the 1st side wall main body 30H whole. Further, a central recess 35A is formed from the center in the front-rear direction to the rear end at the center in the longitudinal direction of the bottom side constituting wall 38, and the center step protrusion 21 (FIG. 6) of the lower end base 11 is fitted into the center recess 35A. It is like that. And the part which protruded back from the rear surface of the 1st side wall main body 30H in the both sides of the center recessed part 35A among the base side structure walls 38 is the side wall protrusions 35 and 35 for hinges based on this invention. Further, at both ends in the longitudinal direction of the bottom side wall 38, the side surfaces 35B of the hinge side wall projections 35 are arranged to be shifted toward the central recess 35A side with respect to both outer side surfaces of the first side wall body 30H. The side step protrusion 22 (FIG. 6) of the lower end base 11 is fitted to the step portion between the side surface 35B of the side wall protrusion 35 and the outer surface of the first side wall body 30H.

  As shown in FIG. 16, hinge locking protrusions 36 corresponding to the locking protrusions 23A (see FIG. 6) of the lower end base 11 protrude from both side surfaces 35B and 35B of the hinge side wall protrusions 35, respectively. Has been. As shown in FIG. 11, the hinge locking protrusion 36 is disposed at a position near the tip of the hinge side wall protrusion 35 in the side surface 35 </ b> B of the hinge side wall protrusion 35. The hinge locking projection 36 has an L-shaped cross section having two sides extending along the lower edge of the side surface 35B and the leading edge of the side surface 35B (the rear side edge portion of the first side wall 30 in the front-rear direction). Thus, the side wall projection 35 for the hinge projects laterally from the side surface 35B. Moreover, the horizontal side of the L-shaped cross section of the hinge locking projection 36 is larger than the vertical side. Then, as shown in FIG. 12, the first side wall 30 is laid horizontally, and the hinge locking protrusions 36 on the side of the central recesses 35 </ b> A of the respective side wall protrusions 35 for hinges are When inserted into the protrusion receiving groove 21A, a part of the hinge locking protrusions 36 on both side surfaces 35B of each hinge side wall protrusion 35 is disposed below each locking protrusion 23A. When the first side wall main body 30H is rotated from this state so as to be raised, a part of the hinge locking projection 36 comes into sliding contact with the movement restricting wall 21B, and each hinge locking projection 36 is directed to the reinforcing projection 23B. Moving. As shown in FIG. 13, when the first side wall main body 30H is in an upright state, the upper surface of the hinge locking projection 36 is in contact with or adjacent to the lower surface of the locking projection 23A.

  Thus, in this embodiment, the 1st side wall main body 30H is rotatably connected with the lower end base 11 by the hinge latching protrusion 36 and the latching protrusion 23A. In other words, in the present embodiment, the “first side wall rotation connecting mechanism” according to the present invention is configured by the hinge locking protrusion 36 and the locking protrusion 23A. Further, as shown in FIG. 14, when the first side wall main body 30 </ b> H is in an upright state, the entire upper surface of the bottom side constituting wall 38 including the hinge side wall protrusion 35 is flush with the upper surface 15 </ b> S of the bottom wall 15. It is configured.

  As shown in FIG. 10, lower surface recesses 38 </ b> C and 38 </ b> C are formed on the lower surface of both ends in the longitudinal direction of the bottom side constituting wall 38. Each lower surface recess 38C is open to the lower side and the front side of the bottom side constituting wall 38, and when the first side wall 30 is in an upright state as shown in FIG. It fits in the recess 38C.

  As shown in FIG. 10, a door hinge side wall recess 37 is formed at a front edge of the base side constituting wall 38 at a portion sandwiched between a pair of lower surface recesses 38 </ b> C and 38 </ b> C. The door hinge side wall recess 37 is open above and in front of the bottom side wall 38. A portion of the upper surface of the bottom side wall 38 where the door hinge side wall recess 37 is opened is located inside the side wall opening 30W. That is, the door hinge side wall recess 37 of the present embodiment is open to the inner surface of the lower end of the side wall opening 30W. Also, as shown in FIG. 11, frame side side boundary walls 37B and 37B provided at the boundary between the door hinge side wall recess 37 and the lower surface recesses 38C and 38C on both sides thereof (FIG. 11 shows one frame side side A rotation support hole 37A is formed through the lower corners of each of the frame-side side boundary walls 37B (only the boundary wall 37B is shown).

  As shown in FIG. 10, the side portion constituting walls 39, 39 constituting both side portions of the first side wall 30 are made to protrude the entire upper portion from the central portion in the vertical direction toward the side wall opening 30 </ b> W inward. Frame side inner protrusions 39A and 39A are formed. In addition, inclined surfaces 39B and 39B are provided at the lower ends of the frame side inner protrusions 39A and 39A so as to be gradually inclined outward toward the lower side. Furthermore, inclined surfaces 39C and 39C are provided at the lower end portions of the side side constituting walls 39 and 39 so as to communicate with the bottom side constituting wall 38 constituting the lower side portion of the first side wall body 30H.

  A stopper wall 33 protrudes into the side wall opening 30W from the inner surface of each frame side inner protrusion 39A that extends in the vertical direction inside the side wall opening 30W. The stopper wall 33 extends vertically along the rear edge of the inner surface of the frame side inner protrusion 39A.

  A hook 34 is provided near the upper end of the front surface of the stopper wall 33. The hook 34 has a shape protruding horizontally from the front surface of the stopper wall 33 and bent downward at a right angle in the middle, and one side of the hook 34 is integrated with the inner surface of the frame side inner protrusion 39A.

  In each side wall 39, a part of the upper end portion of the side wall 39 is depressed from the front side so as to correspond to the rotation restricting protrusion 72 (see FIG. 7) of the second side wall 70 described above. A side depression 39D is formed. In addition, a first side wall connecting protrusion 31, a second side wall connecting protrusion 32, and a first side wall connecting protrusion 31 are arranged in this order from the top on the back surface of each side depression 39D. As shown in FIG. 17, the rotation restricting protrusion 72 of the second side wall 70 is received in the side depression 39 </ b> D, and the first side wall connecting protrusion is inserted into the engagement holes 72 </ b> A and 72 </ b> A of the rotation restricting protrusion 72. 31 and 31 are fitted, and the second side wall connecting projection 32 is fitted into the inner engagement recess 72B (see FIG. 2) of the rotation restricting projection 72.

  As shown in FIG. 10, door penetration protrusions 30T and 30T protrude from positions closer to both ends on the upper surface of the first side wall body 30H. The door penetrating protrusion 30T has a structure in which a rectangular protrusion standing from the first side wall body 30H is reinforced with a rib.

  Next, the side door 40 will be described. As shown in FIG. 10, the side door 40 has a shape that is just fitted inside the side wall opening 30 </ b> W of the first side wall body 30 </ b> H. That is, the side door 40 is narrower on the upper side than the lower middle position than the lower side, and is provided with inclined surfaces 40B and 40B at the middle positions in the vertical direction on both sides of the side door 40. Inclined surfaces 40 </ b> C and 40 </ b> C are also provided at both lower corners of the door 40. Further, the side door 40 includes a reinforcing rib 40L on the front surface side, and a part of the reinforcing rib 40L is disposed along the entire outer edge of the side door 40, and the inclined surfaces 40B and 40C described above are side surfaces. The reinforcing rib 40 </ b> L is formed on the outer edge portion of the door 40. As shown in FIG. 17, when the side door 40 is fitted into the side wall opening 30W, the front end surface of the reinforcing rib 40L in the side door 40 is flush with the front surface of the first side wall body 30H. Further, as shown in FIG. 16, rear recesses 40 </ b> D and 40 </ b> D are formed to be recessed at the upper ends of both side edges on the rear surface of the side door 40. Then, as shown in FIG. 18, the stopper walls 33 and 33 are accommodated in the rear recesses 40D and 40D.

  As shown in FIG. 10, a door hinge lower end recess 41 is formed at the lower end portion of the side door 40 by bending a part of the reinforcing rib 40 </ b> L upward in a crank shape. The door lower end recessed portion 41 for door hinges opens to the lower side and the front side of the side door 40, and the rear side of the door lower end recessed portion 41 for door hinges is closed (see FIG. 13). The total length and depth in the front-rear direction of the door hinge door lower-end recess 41 are the same as the total length and depth of the door hinge side wall recess 37. Further, as shown in FIG. 10, the frame side side boundary walls 41B and 41B corresponding to the both frame side side boundary walls 37B and 37B of the door hinge side wall concave portion 37 of the door hinge door lower end concave portion 41 are rotated. Support holes 41A and 41A are formed through.

  As shown in FIG. 13, a rotation relay member 50 and a slide restricting member 53 are accommodated in a space formed by communication between the door hinge door lower-end recess 41 and the door hinge side wall recess 37. As shown in FIG. 10, the rotation relay member 50 includes first and second rotation shafts 51 </ b> A and 51 </ b> B extending in parallel in the lateral direction of the first side wall 30, and the first and second The rotation shafts 51A and 51B are connected to each other through the connecting plate portion 52 except for both ends in the longitudinal direction. The connecting plate portion 52 has a strip shape extending in the lateral direction of the first side wall 30 similarly to the first and second rotating shafts 51 </ b> A, 51 </ b> B, and is first on both side edges in the width direction of the connecting plate portion 52. The rotating shaft 51A and the second rotating shaft 51B are fixed. In addition, as shown in FIG. 19, square through holes 52B and 52B are formed at positions closer to both ends of the connecting plate portion 52, and the end portion side edge of the connecting plate portion 52 of each through hole 52B is formed. A bulging protrusion 52A is formed by bulging forward.

  On the other hand, the slide restricting member 53 has a shape in which end blocks 53T and 53T are provided at both ends of a strip-like main plate portion 53S extending in the lateral direction of the first side wall 30. The end block 53T is narrower than the main plate portion 53S and thicker than the main plate portion 53S, and protrudes toward the rear surface side of the main plate portion 53S. Further, rectangular through holes 53A and 53A are formed at positions near both ends of the main plate portion 53S. Further, on the rear surface of the main plate portion 53S, a locking claw 54 is provided at an edge of each through hole 53A on the side away from the end of the main plate portion 53S, and the tip of each locking claw 54 is on the through hole 53A side. Overhangs.

  The rotation relay member 50 and the slide regulating member 53 are assembled to the side door 40 and the first side wall body 30H as follows. That is, as shown in FIG. 21, the side door 40 is fitted in the side wall opening 30W of the first side wall body 30H, and the first and second protruding from the connecting plate portion 52 at one end of the rotation relay member 50. The rotation shafts 51A and 51B are inserted into the pair of rotation support holes 41A and 37A. Then, the connecting plate portion 52 is overlapped with the inner surface of the door hinge side wall recess 37 and the door hinge door lower end recess 41 to slide the rotation relay member 50 to the other end side, as shown in FIG. Both ends of the first rotation shaft 51A are inserted into the rotation support holes 41A and 41A at both ends of the door lower end recess 41 for the door hinge, and both ends of the second rotation shaft 51B are the door hinge side wall recess 37. Are inserted into the rotation support holes 37A and 37A at both ends. In this state, the rotation relay member 50 can freely move in the longitudinal direction. Therefore, the slide restriction member 53 is attached to the rotation relay member 50 in order to restrict it. For this purpose, the slide regulating member 53 is curved so that the longitudinal center of the slide regulating member 53 is separated from the rotation relay member 50 to the front side, and the end blocks 53T and 53T at both ends of the slide regulating member 53 are arranged at both ends of the rotation relay member 50. It arrange | positions between the 1st and 2nd rotation shaft 51A, 51B of a part, and makes the slide control member 53 elastically restore. Then, as shown in FIG. 20 (B), the bulging protrusions 52A and 52A of the rotation relay member 50 are accommodated in the through holes 53A and 53A of the slide restricting member 53, and as shown in FIG. The locking claws 54, 54 of the slide regulating member 53 are locked from the through holes 52B, 52B side of the rotation relay member 50 to the rear surface side of the bulging protrusions 52A, 52A. Then, the rotation relay member 50 and the slide regulating member 53 are fixed integrally, and the end blocks 53T and 53T of the slide regulating member 53 are attached to the frame side side boundary walls 37B and 37B and the frame side side boundary walls 41B and 41B. It will be in a state of being faced. Then, the rotation relay member 50 cannot move freely in the longitudinal direction, and both end portions of the first and second rotation shafts 51A and 51B are held in a state of being inserted into the rotation support holes 41A and 37A. .

  As a result, the side door 40 is rotatably connected to the first side wall body 30H, and as shown in FIGS. 23 and 24, the second rotation shaft 51B until the side door 40 changes from the standing posture to the horizontal posture. Rotate around the center. When the side door 40 is in a horizontal posture, the rear surface of the side door 40 is the upper surface 15S of the bottom wall 15 and the lower end inner surface of the side wall opening 30W in the first side wall body 30H (that is, the bottom side constituting wall 38 in the first side wall body 30H. It is almost flush with the top surface. At this time, the first rotation shaft 51 </ b> A is disposed at a position away from the front surface of the first side wall 30. Then, the side door 40 can be pivoted downward about the first pivot shaft 51A so that the side door 40 is vertically lowered as shown in FIG. In addition, when the side door 40 is rotated to the position where the side door 40 abuts on the floor surface of the folding container 10 of the present embodiment while the horizontal container is placed on the floor surface or the like, the side door 40 is rotated. Is inclined so as to fall slightly as it moves away from the center of rotation.

  As shown in FIG. 10, an engagement operation member 42 is attached to the upper front end portion of the side door 40. The engagement operation member 42 includes a mechanism portion (not shown) on the rear surface side of the horizontally long rectangular front plate 42F, is accommodated in a rectangular area surrounded by the reinforcing ribs 40L, and can move up and down with respect to the side door 40. Is engaged. Further, the engagement operation member 42 is urged to the upper end position of the movable range by the elastic member provided in the mechanism portion, and moves downward by placing the finger on the finger hook portion 42A provided in the center of the front plate 42F and pushing it down. Can be done.

  In addition, vertically long through holes 40A and 40A are formed in the group of reinforcing ribs 40L located on both sides of the engaging operation member 42. The band plate engaging pieces 43, 43 projecting from the engaging operation member 42 on both sides extend through the through holes 40 </ b> A to both outer side surfaces of the side door 40. As shown in FIG. 16, rear through holes 40 </ b> R are formed on the rear surface of the side door 40 so as to communicate with the through holes 40 </ b> A of the reinforcing ribs 40 </ b> L located on both outer side surfaces of the side door 40. Then, when the side door 40 is closed in a state where the engaging operation member 42 is pushed down to the lower end position of the movable range, the hooks 34 and 34 enter the rear through holes 40R and 40R. When the engaging operation member 42 is returned to the upper end position of the movable range, the strip plate engaging piece 43 is engaged with the hook 34 and the side door 40 is held in a closed state.

  The description regarding the structure of the folding container 10 of this embodiment is above. Next, the effect of this folding container 10 is demonstrated. When folding the folding container 10, as shown in FIG. 2, the upper doors 80, 80 are opened and overlapped with the outer surfaces of the second side walls 70, 70, and the upper end of the first side wall 30 is placed on the folding container. Strike towards the inside of the 10. Then, due to the impact, the engagement between the engaging protrusion 73T and the first side wall 30 is released, and the first side wall 30 falls inward. Here, in the folding container 10 of this embodiment, the hinge side wall protrusion 35 protruding inward from the lower end of the first side wall 30 is received in the hinge bottom wall recess 20 of the bottom wall 15, and the hinge side wall protrusion Since the tip of the portion 35 is pivotally connected to the bottom wall 15, when the folding container 10 is pivoted inward on the first side wall 30, as shown in FIG. 26, the hinge side wall protrusion 35. The lower end portion of the first side wall 30 other than the first side wall 30 is detached from the hinge bottom wall recess 20, and the entire first side wall 30 is overlaid on the bottom wall 15. In other words, according to the configuration of the present embodiment, the first side wall 30 can be formed without providing the side wall support projecting wall similar to the side wall support projecting wall 12 for the second side wall 70 for the first side wall 30 as in the prior art. The bottom wall 15 can be folded over the top surface 15S. And as shown in FIG. 3, the 2nd side walls 70 and 70 can be folded on the 1st side walls 30 and 30, and the folding container 10 whole can be made into a folding state.

  In order to put the folded container 10 in the folded state into an assembled state, as shown in FIG. 2, the first side walls 30, 30 are raised after the second side walls 70, 70 are raised. Then, each first side wall 30 elastically deforms the elastic engagement pieces 73 and 73 and passes through the engagement protrusions 73T and 73T. And each 1st side wall 30 is hold | maintained in the standing state by the rotation to an inner side being controlled by engagement with the engaging protrusions 73T and 73T. In addition, since the first side walls 30 are sandwiched between both end portions of the second side walls 70, 70, the second side walls 70 are restricted from turning inward and are held in an upright state. Further, when the upper doors 80 and 80 are closed, the door penetrating protrusions 30T and 30T of the first side wall 30 are engaged with the door through holes 82 and 82 of the upper doors 80 and 80, respectively. The side wall 30 is restrained from turning inward and held in an upright state.

  With respect to the folded container 10 in the assembled state, for example, the upper surface doors 80 and 80 can be opened to accommodate luggage from the upper surface side of the folded container 10. In addition, when a plurality of folding containers 10 are stacked as shown in FIG. 27, the first and second lower surface recesses 15D and 15C of the upper folding container 10 have door support portions for the lower folding container 10. 74 and the door penetration protrusion 30T engage, and the upper and lower folding containers 10 and 10 are positioned. Then, by opening the side door 40 of the folding container 10, it is possible to take out the luggage from any folding container 10 while maintaining the stacked state of the folding containers 10 and 10.

  Specifically, in order to open the side door 40, the engaging operation member 42 is pushed down to release the engagement between the strip plate engaging piece 43 and the hook 34, and the side door 40 is pulled forward. As a result, the side door 40 is rotated together with the rotation relay member 50 to a position where it is in a substantially horizontal posture with the lower end portion of the rotation relay member 50 as a center (see FIG. 14). At this time, the rotation relay member 50 protrudes outward from the door hinge side wall recess 37 of the first side wall body 30H. Then, by rotating the side door 40 downward with respect to the rotation relay member 50, as shown in FIG. 15, the side surface from the portion of the rotation relay member 50 protruding outside the first side wall body 30H. The door 40 can be made to hang down. Thereby, the side door 40 of the upper folding container 10 can be suspended vertically downward without interfering with the lower folding container 10, and the side door 40 does not get in the way and can be folded freely. The package can be easily taken out from the container 10.

  In the state where the side door 40 hangs vertically downward from the rotation relay member 50, as shown in FIG. 15, the upper surface of the bottom side wall 38 (the inner surface of the lower end of the side wall opening 30W and the upper surface of the hinge side wall projection 35). And the upper surface 15S of the bottom wall 15 and the end surface 40F on the rotation center side of the side door 40 are flush with each other. Then, it is possible to easily take out the luggage from the folding container 10 while dragging the luggage across a plurality of the same surfaces.

  As described above, according to the configuration of the present embodiment, since the conventional side wall supporting protrusion for the first side wall 30 can be eliminated from the folding container 10, when loading and unloading the luggage from the side through the side wall opening 30W, The side wall support protruding wall will not become an obstacle. Further, by eliminating the conventional side wall support protrusion for the first side wall 30, the upper surface 15S of the bottom wall 15 to the lower end inner surface of the side wall opening 30W can be arranged flush with each other, and it is easy to drag a load. It can be put into and out of the folding container 10. Moreover, in the folding container 10 of the present embodiment, since the luggage can be taken in and out from the side while maintaining the first side wall 30 in the standing state, the luggage can be loaded from the side unless the first side wall is tilted outward. The strength is higher than that of a conventional folding container that cannot be put in and out. In the case of a conventional folding container in which a plurality of folding containers 10 are stacked and a load is applied to the first side wall 30 from above, both the first side wall and the side wall support protrusion wall fall outward. Although there was a risk of buckling between the support projecting walls, in the folding container 10 of the present embodiment, the load from the upper side on the first side wall 30 is the rotational connection between the side door 40 and the first side wall body 30H. Since this portion does not cover the rotational connection portion between the first side wall body 30H and the bottom wall 15, there is no risk of buckling as in the prior art, and the rotational connection portion is not damaged.

[Second Embodiment]
This embodiment is shown in FIGS. 29 to 31 and differs from the first embodiment only in the shape of the lower end portion of the side door 40V. That is, as shown in FIG. 29, the lower end protrusion 49 protrudes from the lower end surface of the side door 40V of the present embodiment toward the door hinge side wall recess 37 of the first side wall body 30H. A rotating shaft 48 having a circular cross section is integrally formed at the lower edge portion of the lower end protrusion piece 49. Further, both end portions of the rotating shaft 48 protrude laterally from both end surfaces of the lower end protrusion piece 49. Further, guide slopes 48G are formed at both ends of the rotating shaft 48 by obliquely cutting the lower part from the center thereof. Then, as shown in FIG. 30, the guide slopes 48G and 48G are pressed against the frame-side side boundary walls 37B and 37B of the door hinge side wall recess 37 so that the lower end protrusion 49 is pushed into the door hinge side wall recess 37. Further, both end portions of the rotation shaft 48 are held in a state of being inserted into the rotation support holes 37A and 37A.

  According to the configuration of the present embodiment, the side door 40V can be rotated and opened with its lower end portion as the center, as shown in FIG. At this time, the side door 40V protrudes outward from the hinge side wall recess 37 of the first side wall 30, and the rear surface of the side door 40V, the lower end inner surface of the side wall opening 30W, and the upper surface 15S of the bottom wall 15 It becomes almost the same. As a result, it is possible to easily take in and out the folding container 10 from the side while dragging the luggage.

[Other Embodiments]
The present invention is not limited to the above-described embodiment. For example, the embodiments described below are also included in the technical scope of the present invention, and various other than the following can be made without departing from the scope of the invention. It can be changed and implemented.

  (1) In the folding container 10 of the embodiment, the first side wall 30 is detachably connected to the lower end base 11. For example, the first side wall 30 is connected to the lower end base 11 with a metal pin. And may be connected so as not to be removable.

  (2) In the folding container 10 of the embodiment, the side doors 40 are provided on both of the pair of first side walls 30, 30, but the side door 40 is provided only on the first side wall 30. It is good.

  (3) In the folding container 10 of the above embodiment, the upper surface of the bottom constituting wall 38 and the upper surface 15S of the bottom wall 15 in the first side wall body 30H are flush with each other. It may be arranged at a position lower than the upper surface 15S of the wall 15, or by placing the upper surface of the bottom side constituting wall 38 at a position slightly higher than the upper surface 15S of the bottom wall 15, the load is slightly caught on the step. The folding container 10 may be prevented from slipping off.

  (4) In the folding container 10 of the above-described embodiment, the bottom wall recess 20 for hinges is recessed and formed on the bottom wall 15. For example, both end portions of the bottom wall 15 in the folding container 10 of the first embodiment are described. May be cut out so as to be shorter than the side wall support projecting walls 12 and 12 to form a hinge bottom wall recess according to the present invention, and the lower end of the first side wall may be received in the hinge bottom wall recess.

DESCRIPTION OF SYMBOLS 10 Folding container 15 Bottom wall 15H Bottom wall main body 15S Upper surface 20 Bottom wall recessed part for hinges 23A Locking protrusion (1st side wall rotation connection mechanism)
30 First side wall 30W Side wall opening 35 Hinge side wall projection 36 Hinge locking projection (first side wall rotation connecting mechanism)
37 Side wall recess for door hinge 40, 40V Side door 42 Engagement operation member 48 Rotating shaft 49 Lower end protrusion 50 Rotation relay member 70 Second side wall

Claims (4)

A pair of first side walls arranged on a pair of opposite sides of a bottom wall having a quadrangular shape and a pair of second side walls arranged on the other pair of opposite sides rotate around a lower end portion. Then, in the folding container that is overlaid on the bottom wall in the order of the first and second side walls and is in a folded state,
A side wall support projecting wall provided on an outer edge portion of the bottom wall where the second side wall is disposed, protruding upward from an upper surface of the bottom wall, and rotatably supporting the second side wall;
A hinge side wall protrusion protruding inward from a lower end of the first side wall;
The hinge side wall protrusion is formed at an outer edge of the bottom wall where the first side wall is disposed, and a part of an upper surface of the bottom wall is depressed or a part of the bottom wall is cut away. A bottom wall recess for a hinge that receives a lower end portion of the first side wall including:
A first side wall rotation connecting mechanism that rotatably connects the tip of the side wall protrusion for the hinge and the bottom wall;
A side wall opening that is formed through the first side wall to allow loading and unloading of the folding container;
A folding container comprising a side door for opening and closing the side wall opening. A door hinge side wall recess is formed at the lower end of the first side wall and is open to the outer surface of the first side wall and the lower end inner surface of the side wall opening, and the lower end is received in the door hinge side wall recess, while the upper end is A rotation relay member protruding upward from the side wall recess for the door hinge is provided,
The lower end portion of the rotation relay member is rotatably connected to the first side wall, and the upper end portion of the rotation relay member is rotatably connected to the lower end portion of the side door. Item 2. A folding container according to item 1.   A door hinge side wall recess is formed at the lower end of the first side wall on the outer surface and the lower end inner surface of the side wall opening, and the lower end of the side door is received in the door hinge side wall recess to receive the first The folding container according to claim 1, wherein the folding container is rotatably connected to one side wall.   4. The upper surface of the hinge side wall protrusion, the inner surface of the lower end of the side wall opening, and the upper surface of the bottom wall body excluding the hinge bottom wall recess are arranged substantially flush with each other. The folding container according to claim 1.

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