JP5717194B2 - Rotating side wall engagement mechanism for folding containers - Google Patents

Description

  The present invention includes a pair of jumping side walls and a pair of bent side walls between a bottom base and an upper frame that are vertically opposed to each other, and a pair of the jumping side walls with their upper ends as the center. Among the folding containers that can be folded inward after turning inward, the turning side wall and the upper frame are turned upside down. The present invention relates to a side wall engaging mechanism.

  As a folding container of this type, a part of which is shown in FIG. 21, in addition to a hinge mechanism that rotatably connects the rotating side wall 2 and the upper frame 1, the rotating side wall 2 and the upper frame 1. And a rotating side wall engaging mechanism for resisting a load that pulls up and down. The rotating side wall engaging mechanism includes an engaging protrusion 4 that protrudes laterally from the vertical rib 3 of the upper frame 1 and extends along the rotation center of the hinge mechanism, and an outer edge portion on the upper surface of the rotating side wall 2. And a curved wall 5 whose upper end is curved. The engaging projection 4 is arranged on the inner side of the curved wall 5 as shown in FIG. 1).

Japanese Patent Laying-Open No. 2008-290752 (see FIGS. 7 and 9)

  However, the conventional folding side wall engaging mechanism of the folding container described above has the curved wall 5 engaged with the upper surface of the engaging projection 4 when the rotating side wall 2 is in the standing posture (see FIG. 22A). In combination, the load in the vertical direction can be countered, but as shown in FIG. 22 (B), when the rotating side wall 2 is in the folded position, the engagement of the curved wall 5 with the upper surface of the engaging protrusion 4 is released. Therefore, there is a problem that the connection strength between the rotating side wall 2 and the upper frame 1 is lowered.

  The present invention has been made in view of the above circumstances, and is a folding side wall engaging mechanism for a folding container that can increase the connection strength between the rotating side wall and the upper frame in the folding posture. For the purpose of provision.

  The folding side wall engaging mechanism of the folding container according to the invention of claim 1 made to achieve the above object has a rectangular parallelepiped box shape as a whole, and a bottom base constituting the bottom and an upper part constituting the top. A pair of jumping side walls and a pair of bent side walls are arranged opposite to each other between the frames, and the jumping side walls are connected to the upper frame so that only the upper end portion is pivotable. However, the upper and lower ends are pivotably connected to the upper frame and the bottom base, and the pair of jumping side walls are turned upward, and then the pair of bent side walls are folded inward. In the rotating side wall engaging mechanism of the upper side frame and the rotating side wall which is a jumping side wall or a bent side wall among the folding containers capable of being lifted, it rises from the upper surface of the rotating side wall and enters the inner side of the rotating side wall from the middle It is possible to have a curved wall and a movable side locking projection bent downward from the tip of the curved wall. A side-facing hook is provided, and a shaft-facing wall facing the pivot center axis of the pivoting side wall of the upper frame from the inside of the upper frame, and a fixed side bent from the lower end of the shaft-facing wall to the outside of the upper frame A fixed side hook composed of a locking projection is provided, and the tip end surface of the movable side locking projection is locked to the upper surface of the fixed side locking projection in the standing posture of the rotating side wall. In the posture, the inward surface of the movable side locking projection is configured to be locked to the upper surface of the fixed side locking projection.

  According to a second aspect of the present invention, in the rotating side wall engaging mechanism of the folding container according to the first aspect, the movable side hook and the fixed side hook are opposed to each other in the axial direction of the rotating central axis of the rotating side wall. 1 and a second side reinforcing wall are provided, and the first side reinforcing wall is integrally formed on one side portion of the movable side hook, while the second side reinforcing wall is integrally formed on one side portion of the fixed side hook. It has the characteristics where it was done.

The rotating side wall engaging mechanism of the folding container according to the invention of claim 3 has a rectangular parallelepiped box shape as a whole, and a pair of a bottom base constituting the bottom and a pair of upper frames constituting the top. The jumping side wall and the pair of bent side walls are arranged to face each other, and the jumping side wall is rotatably connected to the upper frame only at the upper end portion, while the bent side walls are connected to the upper and lower ends at the upper frame. Of the folding container that is pivotably connected to the base and the bottom base, and is capable of rotating the pair of jumping side walls upward and then folding the pair of folding side walls in two. In the rotating side wall engaging mechanism of the rotating side wall and the upper frame that is the upper side wall or the bent side wall, the shaft facing wall that is opposed to the rotating central axis of the rotating side wall of the upper frame from the inside of the upper frame; A fixed-side hook comprising a fixed-side locking protrusion bent from the lower end of the shaft-facing wall to the outside of the upper frame, and a rotating side Provided with an engaging rib projecting upward space of the fixed side retaining projection from the upper surface protrusion facing the fixed-side hook in the axial direction of the rotational axis of the rotating side wall of, the engaging rib times A first locking surface that locks to the upper surface of the fixed-side locking projection in the standing posture of the moving side wall, and a second locking surface that locks to the upper surface of the fixed-side locking projection in the folded posture of the rotating side wall And features.

[Invention of Claim 1]
In the rotating side wall engaging mechanism of the folding container according to claim 1, the front end surface of the movable side locking projection on the rotating side wall is on the upper surface of the fixed side locking projection on the upper frame in the standing posture of the rotating side wall. The inward surface of the movable side locking projection is locked to the upper surface of the fixed side locking projection in the folded posture of the rotating side wall. That is, not only when the rotating side wall is in the standing posture, but also when the rotating side wall is in the folded posture, the fixed side locking protrusion of the upper frame and the movable side locking protrusion of the rotating side wall are locked. As compared with the above, the connection strength between the rotating side wall and the upper frame in the folded posture is increased.

[Invention of claim 2]
According to the rotating side wall engaging mechanism of the folding container according to claim 2, the movable side hook is reinforced by the first side reinforcing wall, and the fixed side hook is reinforced by the second side reinforcing wall. Locking between the locking protrusion and the fixed-side locking protrusion is stable.

[Invention of claim 3]
In the folding side wall engaging mechanism of the folding container according to claim 3, the first locking surface of the engaging rib on the rotating side wall is engaged with the upper surface of the fixed side locking projection in the upper frame in the standing posture of the rotating side wall. The second locking surface of the engaging rib is locked to the upper surface of the fixed-side locking protrusion in the folded posture of the rotating side wall. That is, not only when the rotating side wall is in the standing posture, but also when the rotating side wall is in the folded posture, the fixed side locking projection of the upper frame and the engaging rib of the rotating side wall are locked, Compared with the prior art, the connection strength between the rotating side wall in the folded position and the upper frame is increased.

The perspective view of the folding container which concerns on one Embodiment of this invention (A) Top side perspective view of upper frame, (B) Bottom side perspective view of upper frame Lower side perspective view of long side rotation support part in upper frame Enlarged perspective view of fixed hook Lower side perspective view of short side rotation support part in upper frame (A) Top side perspective view of bottom base, (B) Bottom side perspective view of bottom base (A) Outer side perspective view of jumping side wall, (B) Inner side perspective view of jumping side wall Perspective view of the upper end of the jumping side wall External perspective view of bent side wall Inside perspective view of bent side wall (A) The perspective view of the upper end connection part seen from the inner surface side of the upper side bent side wall, (B) The perspective view of the upper end connection part seen from the outer side of the upper side bent side wall Perspective view of movable hook A perspective view of a connecting portion between the upper frame and the upper bent side wall The perspective view of the connection part of an upper frame and a jumping side wall The perspective view of the connection part of an upper frame, an upper side bending side wall, and a jumping side wall Perspective view of a folding container with the top lid fully open Perspective view of the folded container in the folded state Cross section of a folded container Sectional view of the fixed hook and the movable hook in the folded container in the assembled state Sectional view of the fixed hook and the movable hook in the folded container in the folded state The perspective view of the connection part of the upper frame and upper side folding side wall of the conventional folding container (A) Sectional view of the upper frame and the upper folded side wall in the assembled state of the conventional folding container, (B) Sectional view of the upper frame and the upper folded side wall in the folded state of the folded container

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the folding container 10 of the present embodiment is a resin molded product having a rectangular parallelepiped box shape as a whole, and includes a bottom base 11 constituting the bottom and an upper frame 20 constituting the top. A pair of bent side walls 30, 30 and jumping side walls 40, 40 are assembled, and a pair of upper surface lids 50, 50 are assembled on the upper surface of the upper frame 20. Yes. The “folding container engaging side wall engaging mechanism” according to the present invention is provided between the upper bent side wall 31 and the upper frame 20 of each bent side wall 30.

As shown in FIG. 2A, the upper frame 20 has a rectangular frame shape, and lid rotation support portions 20E and 20E are formed on the upper surfaces of a pair of long side portions of the upper frame 20. The upper lid 50 (see FIGS. 1 and 16) is rotatably connected to each lid rotation support portion 20E. On the upper surface in the short side portions of the pair of upper frame 20, a total of four frame top projection 22 by respectively one pair is formed to protrude, they frame top projection 22 as shown in FIG. 1, top lid 50 passes through the engagement hole 51 penetratingly formed in 50, and protrudes above the upper surface lid 50. Further, as shown in FIG. 2A, a closing hole 24 is formed in the center in the longitudinal direction on the inner surface of the pair of short sides of the upper frame 20, and the locking is assembled to each upper surface lid 50. By sliding the slider 60 (see FIG. 1) and engaging with the closing hole 24, the upper surface lid 50 can be held in the closed state.

  Each upper surface lid 50 is an integrally molded product of an opaque resin frame member 50H that constitutes the entire outer edge portion thereof, and a colorless and transparent resin window plate member 50G that closes the inner opening of the frame member 50H. It has become.

  As shown in FIG. 2 (B), both the long side portion and the short side portion of the upper frame 20 have a groove structure in which the cross-sectional shape is opened downward. The outer frame side wall 20A and the inner frame side wall 20B that are opposed to each other with the groove opening sandwiched in the groove shape structure are such that the outer frame side wall 20A extends longer than the inner frame side wall 20B and the inner frame side wall in the short side portion of the upper frame 20 The lower end of 20B is located above the lower end of the inner frame side wall 20B in the long side portion. The long side rotation support portions 20D and 20D are formed on the inner surface of the lower end portion of the outer frame side wall 20A in the long side portion of the upper frame 20, while the outer frame side wall 20A in the pair of short side portions of the upper frame 20 is formed. The short-side rotation support portions 20C and 20C are formed on the inner surface of the, and the short-side rotation support portion 20C is disposed above the long-side rotation support portion 20D.

  The inner frame side wall 20B in the long side portion of the upper frame 20 is connected in a state orthogonal to the outer frame side wall 20A of the short side portion, and the end portion in the longitudinal direction of the inner frame side wall 20B in the long side portion of the upper frame 20 The inner frame side wall 20B of the short side portion of the upper frame 20 is connected to the offset position. Further, as shown in FIG. 2A, the outer frame side wall 20A is cut off at both ends in the longitudinal direction of the long side portion of the upper frame 20, and is projected outward from the position near the lower end of the inner frame side wall 20B. A hood wall 20W curved downward is provided. As shown in FIG. 19, the lower end portion of the hood wall 20W is parallel to the vertical direction, and the lower end surface of the hood wall 20W is flush with the lower end surface of the outer frame side wall 20A.

  As shown in FIG. 3, the long side rotation support portion 20 </ b> D of the upper frame 20 has a symmetrical structure with respect to the longitudinal center of the long side portion of the upper frame 20. Specifically, vertical ribs communicating between the outer frame side wall 20A and the inner frame side wall 20B and between the inner frame side wall 20B and the hood wall 20W are provided at a plurality of positions in the longitudinal direction in the long side portion of the upper frame 20. Are provided, and the lower end portions of these vertical ribs project inward from the inner surface of the lower end portion of the outer frame side wall 20 </ b> A to form support ribs 98. A hinge hole 92A is formed through the support rib 98 closest to the center of the long side portion of the upper frame 20, a fixed-side subhook 93A is formed on one side surface of the adjacent support rib 98, and the adjacent support rib 98A is further supported. A hinge shaft body 94A is formed to protrude from one side surface of the rib 98. And the fixed side hook 25 which concerns on this invention is formed in the side surface which faced the center side among the support ribs 98 farthest from the center of the long side part of the upper frame 20.

  The hinge hole 92 </ b> A and the hinge shaft body 94 </ b> A are coaxially disposed, and the upper bent side wall 31 is rotated around the upper frame 20 by engaging with a hinge protrusion 92 and a shaft support portion 94 described later of the upper bent side wall 31. A hinge mechanism is configured to be movably connected. Therefore, the central axis of the hinge hole 92A and the hinge shaft body 94A is the rotation central axis J1 (see FIGS. 19 and 20) of the bent side wall 30. Further, the fixed side sub hook 93 </ b> A and the fixed side hook 25 are engaged with the locking curved wall 93 and the movable side hook 37 in the upper bent side wall 31, thereby pulling the upper frame 20 and the upper bent side wall 31 up and down. The present invention is applied to a rotating side wall engaging mechanism that constitutes a rotating side wall engaging mechanism for resisting a load, and in which a fixed side hook 25 and a movable side hook 37 are engaged. The detailed shape of the fixed side hook 25 is as follows.

  That is, as shown in FIG. 4, the fixed-side hook 25 bends the lower end portion of the vertical wall 25A (corresponding to the “shaft-facing wall” of the present invention) that extends vertically downward from the inner frame side wall 20B outward. Thus, the fixed side locking projection 25B is formed. As shown in FIG. 19, the upper surface 25D of the fixed-side locking projection 25B is horizontal and is positioned below the rotation center axis J1 of the upper bent side wall 31, and vertically below the rotation center axis J1. A reference line (not shown) hanging from the upper frame 20 is configured so as to be located in the middle of the upper surface of the fixed-side locking projection 25B in the inner and outer directions of the upper frame 20. Moreover, the front end surface 25E of the fixed side locking projection 25B is vertical, and the lower surface of the fixed side locking projection 25B is an inclined surface 25F that is inclined upward toward the tip. Moreover, it covers with the hood wall 20W from the outer side of the fixed side hook 25, and the opposing protrusion 26 protrudes and forms in the lower side part from the opposing position with the fixed side hook 25 among the inner surfaces of the hood wall 20W. The opposing protrusion 26 has a trapezoidal shape with inclined surfaces at both ends in the vertical direction and a flat surface at the center in the vertical direction. The fixed side sub-hook 93 </ b> A (see FIG. 3) has the same structure as the fixed side hook 25.

  As shown in FIG. 5, the short-side rotation support portion 20 </ b> C of the upper frame 20 has a bilaterally symmetric structure and includes a plurality of support ribs 108 like the long-side rotation support portion 20 </ b> D. A hinge hole 101A is formed through the support rib 108 close to the center of the short side portion of the upper frame 20, and a hinge shaft body 102A is formed so as to protrude from one side surface of the adjacent support rib 108. Further, a support groove 20K is formed at an end portion of the inner frame side wall 20B in the long side portion of the upper frame 20 that faces the support rib 108. The support groove 20K has a shape extending in the vertical direction and having a lower end opened. The hinge hole 101A, the hinge shaft body 102A, and the upper end portion of the support groove 20K are arranged coaxially.

  As shown in FIG. 6A, the bottom base 11 has the same rectangular shape as that of the upper frame 20, and the bottom surface surrounding wall 11S protrudes from the entire outer edge of the upper surface to form a tray shape. Rotating support portions 11D and 11D are provided inside the pair of long side portions of the bottom surface surrounding wall 11S. On the other hand, inside the pair of short side portions in the bottom surface surrounding wall 11S, central engaging protrusions 11R and 11R are provided at the center thereof. The center engaging protrusion 11R has a part of the bottom surface of the bottom base 11 raised in a horizontally long rectangular parallelepiped shape, and a rotation restricting hole 14 is formed through the center of the center engaging protrusion 11R in the longitudinal direction. ing. In addition, locking protrusions 11K and 11K protrude laterally from both longitudinal end faces of the central engagement protrusion 11R. Further, a locking projection (not shown) is formed on the bottom surface of the distal end of the locking projection 11K. A pair of rectangular protrusions 11M and 11M protrude from the bottom surface of the bottom base 11 on both sides of the center engaging protrusion 11R.

  As shown in FIG. 6B, the bottom surface of the bottom base 11 is formed with a grid rib 11L protruding from the entire surface excluding the outer edge. Further, at the outer edge corner portion of the bottom base 11 where the lower surface and the side surface intersect with each other, the belt locking recesses 13 are respectively provided at two positions near both ends of each long side portion and at the center position of each short side portion. Is formed. When a plurality of folding containers 10 are stacked, the belt locking recess 13 can also be used as a finger insertion part for inserting a finger between the upper and lower folding containers 10, 10.

  As shown in FIG. 7A, the jumping side wall 40 has a structure in which, for example, a rib plate is provided on a main plate portion 49 that is substantially square as a whole and is reinforced. Specifically, a pair of first bulging protrusions 41 and 41 are formed on the jumping side wall 40 by bulging both side edge portions of the main plate portion 49 outward from the lower end portion toward the upper end position. Next to the first bulging protrusions 41, 41, a part of the main plate portion 49 is bulged in the same manner as the first bulging protrusion 41, and the first bulging protrusions 41, 41 are formed. Second bulging protrusions 42, 42 are formed that extend in the vertical direction with the same length. In addition, corner connecting portions 45 and 45 are formed at two positions in the vertical direction of the first bulging protrusions 41 and 41, respectively. Each corner connecting portion 45 dents part of the first bulging protrusion 41 that is on both sides of the jumping side wall 40 from the outside, and protrudes the connecting piece 45T from the back surface of the recessed portion. The structure is

  At a position near the lower end of the outer surface of the jumping side wall 40, the first lower end lateral rib 40D extends over the entire left and right direction of the jumping side wall 40. At the center in the longitudinal direction of the first lower end lateral rib 40D, a rotation restricting hole 46 is formed penetrating in the vertical direction. Moreover, the part which cross | intersects the 1st and 2nd bulging protrusion parts 41 and 42 among the 1st lower end horizontal rib 40D is the 1st and 2nd in the inner surface of the jumping side wall 40, as shown in FIG.7 (B). The groove-like depressions on the back side of the bulging protrusions 41 and 42 are crossed. Furthermore, a plurality of in-groove ribs 40 </ b> P crossing the groove-like depressions on the back side of the first bulging protrusion 41 are provided on the upper side of the first lower end lateral rib 40 </ b> D.

  As shown in FIG. 7A, the lower end portion of the jumping side wall 40 is provided with a second lower end lateral rib 40E extending in parallel with the first lower end lateral rib 40D, and the longitudinal length of the second lower end lateral rib 40E. A central engaging recess 40R is formed by cutting out the central portion in the direction. Further, a part of the second lower end lateral rib 40E is bent upward in a crank shape at both side portions of the center engaging recess 40R in the lower end portion of the jumping side wall 40, and a pair of protrusion engaging recesses 40N, 40N is formed, and the vertical rib 40L which connects the 1st and 2nd lower end horizontal ribs 40D and 40E is provided in each two places on both sides of each protrusion engaging recessed part 40N. Between the pair of protrusion engaging recesses 40N and 40N and the central engaging recess 40R, the vertical rib 40L, the first and second lower end horizontal ribs 40D and 40E, and the main plate portion 49 are vertically A pair of projecting piece engaging recesses 40M, 40M are provided that are surrounded by one side and the rear and communicate with the central engaging recess 40R. In addition, a locking protrusion 40U protrudes from the lower surface in each protrusion engaging recess 40M.

  The band-like region adjacent to the first lower end lateral rib 40D between the second bulging protrusions 42, 42 in the main plate portion 49 bulges outward smaller than the second bulging protrusion 42 and is stepped bulging. Part 40S. Then, holder fixing protrusions 43 and 43 are formed to protrude outward from two positions above the protrusion engaging recesses 40N and 40N in the stepped bulging portion 40S, and the holder fixing protrusions 43 and 43 and the first lower end are formed. The horizontal ribs 40D are opposed to each other with a gap in the vertical direction. A card holder (not shown) is attached to the holder fixing projections 43, 43, and the card can be held between the card holder and the outer surface of the jumping side wall 40.

  As shown in FIG. 7 (A), a first upper end lateral rib 40F extending across the entire left and right direction of the jumping side wall 40 is provided at a position near the upper end of the outer surface of the jumping side wall 40. The upper portion of the rib 40F is an upper end connection portion 47 that connects the jumping side wall 40 to the short side rotation support portion 20C of the upper frame 20, and the upper end connection portion 47 is also the short side rotation support portion 20C. As with, it has a symmetrical structure. Specifically, in the upper end connecting portion 47, the upper surface of the first upper end lateral rib 40F and the outer surface of the main plate portion 49 are connected by a plurality of upper end protrusions 40K. Further, side shaft portions 48, 48 protrude laterally from upper end protrusions 40 K, 40 K at both ends in the left-right direction of the jumping side wall 40, and a disc is provided at the tip of each side shaft portion 48. Furthermore, the upper end protrusions 40 </ b> K group and the upper end portions of the main plate portion 49 are curved in an arc shape centering on the axis of the side shaft portions 48, 48. A plurality of engaging recesses 108Z are formed by cutting out the main plate portion 49 between the upper end protrusions 40K, 40K at a plurality of positions in the left-right direction of the jumping side wall 40.

  As shown in FIG. 8, a hinge protrusion 101 is formed to protrude on one inner side surface of the engagement recess 108 </ b> Z disposed near the center in the lateral direction of the jumping side wall 40, and on the other inner side surface, A support rib pressing protrusion 104 is formed to protrude at a position shifted upward with respect to the hinge protrusion 101. In addition, a groove-like shaft support portion 102 that is open to the inner surface side of the jumping side wall 40 is integrally formed on one inner side surface in the engaging recess 108Z disposed near both ends in the lateral direction of the jumping side wall 40, On the other inner surface, a support rib pressing protrusion 105 is formed so as to protrude at a position shifted upward with respect to the center of the shaft support section 102. Then, the upper side connecting portion 47 is pressed against the short side rotation support portion 20C of the upper frame 20 with the jumping side wall 40 in a horizontal posture, and as shown in FIG. The support rib 108 in the short side rotation support portion 20C of the upper frame 20 is received inside. Then, the hinge protrusion 101 (see FIG. 8) is rotatably fitted in the hinge hole 101A (see FIG. 5), and the hinge shaft body 102A is pushed into the shaft support portion 102 as shown in FIG. The hinge mechanism is configured to be fitted so as to be rotatable, and further, the side shaft portion 48 is pushed into the upper portion from the lower side of the support groove 20K to connect the jumping side wall 40 to the upper frame 20 so as to be rotatable.

  As with the top cover 50, the flip-up side wall 40 is also made of an opaque resin frame member 40H constituting the entire outer edge portion, and a colorless and transparent resin window plate member closing the inner opening of the frame member 40H. 40G is integrally molded. Further, a finger hook portion 44 is provided above the window plate member 40G in the outer surface of the jumping side wall 40. The finger hook portion 44 is configured by an annular rib protruding from an outer edge portion of a region where the entire horizontally long rectangle is bent downward.

  As shown in FIG. 1, the bent side wall 30 is divided into an upper bent side wall 31 and a lower bent side wall 32 by a central intermediate hinge portion 33 so that it can be folded in two. As shown in FIG. 9, the upper bent side wall 31 has a structure in which, for example, a flat main plate 39 having a horizontally long rectangle is provided with ribs or the like to be reinforced. Specifically, the upper bent side wall 31 is formed with a pair of side edge bulging projections 31C and 31C extending in the vertical direction by bulging both side edges of the main plate 39 outward. . Further, the lower end lateral rib 31B protrudes from the position near the lower end of the main plate portion 39, and communicates between the positions near the lower end of the side edge bulging protrusions 31C and 31C. Furthermore, the upper end lateral rib 31A protrudes from the upper end portion of the main plate portion 39, and communicates between the upper end portions of the side edge bulging protrusions 31C and 31C.

  An upper portion of the upper bent side wall 31 above the upper end lateral rib 31A is an upper end connecting portion 31F connected to the long side rotation support portion 20D of the upper frame 20, and the upper end connecting portion 31F is also connected to the long side side rotation. Similar to the moving support portion 20D, the structure is symmetrical. Specifically, in the upper end connection portion 31F, the upper surface of the upper end lateral rib 31A and the outer surface of the main plate portion 39 are connected by a plurality of upper end protrusions 31E, and the upper end protrusions 31E and the upper ends of the main plate portions 39 are connected. The part is curved in an arc shape. Further, as shown in FIG. 11, at a plurality of positions in the left-right direction of the upper bent side wall 31, a plurality of engagement recesses 98Z are formed by cutting out the main plate portion 39 between the upper end protrusions 31E, 31E. .

  A hinge protrusion 92 is formed on one inner surface of the first engagement recess 98Z from the center in the lateral direction of the upper bent side wall 31 among the plurality of engagement recesses 98Z, and on the other inner surface. The support rib pressing protrusion 91 is formed so as to protrude at a position shifted upward with respect to the hinge protrusion 92. A locking curved wall 93 is formed on one inner side surface in the second engagement recess 98 </ b> Z from the center of the upper bent side wall 31. As shown in FIGS. 11A and 11B, the locking curved wall 93 is on the outer surface side of the upper bent side wall 31 in the bottom surface of the engaging recess 98Z (that is, the upper surface of the upper bent side wall 31). The upper end side is curved upward toward the inner surface side of the upper bent side wall 31. On one inner side surface in the third engaging recess 98Z from the center of the upper bent side wall 31, a groove-shaped shaft support portion 94 opened to the inner side of the upper bent side wall 31 is formed. A support rib pressing projection 96 projects from the fourth engagement recess 98Z from the center of the upper side, that is, one inner surface of the engagement recess 98Z on the most end side in the lateral direction of the upper bent side wall 31. ing.

  As shown in FIG. 11B, upper end protrusions 31E and 31E disposed at both ends in the lateral direction of the upper bent side wall 31 (FIG. 11B shows only the upper end protrusion 31E at one end. ) Protrudes upward from the other upper end protrusions 31E, and movable side hooks 37, 37 according to the present invention are formed on the side surfaces of the upper end protrusions 31E, 31E at both ends, respectively. . As shown in FIG. 12, the movable hook 37 extends vertically upward from an edge on the outer surface side of the upper bent side wall 31 in the upper surface of the upper bent side wall 31 and then extends vertically upward. It consists of a curved wall 37A that is bent and extends inward and horizontally, and a movable side locking projection 37B that is bent vertically downward from the tip of the curved wall 37A. Further, a rear projection 37D protrudes from the tip of the curved wall 37A on the side opposite to the movable side locking projection 37B. Furthermore, a rib 37E that communicates between the rear projection 37D and the outer surface of the curved wall 37A is provided at the edge of the outer surface of the curved wall 37A that is away from the upper end projection 31E.

  As shown in FIG. 13, the upper bent side wall 31 is placed in a horizontal posture, and the upper end connecting portion 31 </ b> F is pressed against the long side rotation support portion 20 </ b> D of the upper frame 20. The support rib 98 in the long side rotation support portion 20D of the upper frame 20 is received in 98Z. Then, the hinge protrusion 92 (see FIG. 11) is rotatably fitted in the hinge hole 92A (see FIG. 3), and the hinge shaft body 94A is pushed into the shaft support portion 94 as shown in FIG. The above-described hinge mechanism is configured to be movably fitted and to pivotally connect the upper bent side wall 31 to the upper frame 20.

  Further, when the upper bent side wall 31 is set in a horizontal posture and the upper end coupling portion 31F is pressed against the long side rotation support portion 20D of the upper frame 20, the movable side locking projection 37B of the movable side hook 37 shown in FIG. Is in sliding contact with the inclined surface 25F of the fixed side locking projection 25B of the fixed side hook 25, and the back surface projection 37D is slidably in contact with the inner surface of the hood wall 20W to push between the fixed side hook 25 and the hood wall 20W. The fixed side hook 25 and the hood wall 20W are elastically deformed so as to be spread. Then, the movable side locking projection 37B and the back surface projection 37D are accommodated in the space above the fixed side locking projection 25B, and the fixed side hook 25 and the hood wall 20W are elastically restored, and the movable side locking projection 37B. The inwardly facing surface 37Y of the fixed side locking projection 25B is opposed to the upper surface 25D in the vertical direction and can be locked.

  Further, at this time, the bent end portion of the locking curved wall 93 (see FIG. 11A) having a shape in which the movable side locking protrusion 37B and the back surface protrusion 37D are excluded from the movable side hook 37 is shown in FIG. The fixed side sub-hook 93A is disposed in front of the fixed side locking projection 93T. When the upper bent side wall 31 is stood up, the bent end of the locking curved wall 93 shown in FIG. 11 (A) becomes the upper surface of the fixed side locking projection 93T in the fixed side subhook 93A shown in FIG. It will be in the state which can be opposed and locked to the up-down direction. Further, when the upper bent side wall 31 is raised, as shown in FIG. 19, the tip surface 37X of the movable side locking projection 37B is opposed to the upper surface 25D of the fixed side locking projection 25B in the vertical direction. It can be locked.

  At this time, the outer surface of the curved wall 37 </ b> A of the movable side hook 37 contacts the opposing protrusion 26, and the movable side locking protrusion 37 </ b> B and the rear surface protrusion 37 </ b> D contact the vertical wall 25 </ b> A of the fixed side hook 25. . Thereby, the positions of the movable side locking projection 37B and the fixed side locking projection 25B in the inner and outer directions of the upper frame 20 are stabilized, and the movable side locking projection 37B and the fixed side locking projection 25B are moved. Locking at the time of contact is also stable. In the present embodiment, one side portion of the movable hook 37 is reinforced and fixed by an upper end protrusion 31E (see FIG. 11A) corresponding to the “first side reinforcing wall” of the present invention. Since one side portion of the side hook 25 is reinforced by the support rib 98 (see FIG. 4) corresponding to the “second side reinforcing wall” of the present invention, the movable side locking projection 37B also in this respect. And the fixed side locking projection 25B are in a stable locking state.

  As shown in FIG. 9, intermediate hinge components 31 </ b> K are provided at a plurality of positions in the left-right direction of the upper bent side wall 31 at a portion below the lower end lateral rib 31 </ b> B in the outer surface of the main plate portion 39 in the upper bent side wall 31. Is provided. The intermediate hinge constituting part 31K is formed by connecting a pair of opposed pieces 31N, 31N protruding from the main plate part 39 by a hinge shaft 31M. Further, side shaft portions 31P and 31P protrude from the lower ends of the opposing surfaces of the side edge bulging protrusions 31C and 31C on the same axis as the hinge shaft 31M.

  As shown in FIG. 10, the back surface side of the side edge bulging protrusion 31C of the upper bent side wall 31 is recessed in a groove shape, and an in-groove rib 31L is provided that crosses the grooved recess in the width direction. ing. Further, side hooks 34 are provided at intermediate positions in the vertical direction of the side edge bulging protrusions 31C. The side hook 34 extends a part of the wall portion on both side surfaces of the upper bent side wall 31 in the side edge bulging protrusion 31 </ b> C to the inner surface side of the upper bent side wall 31, and then the left and right sides of the upper bent side wall 31. It is bent at right angles to the center of the direction.

  As shown in FIG. 9, the lower bent side wall 32 has a structure in which a rib plate or the like is provided on a flat main plate portion 38 having a horizontally long rectangular shape that is substantially the same size as the upper bent side wall 31. It has become. Specifically, the lower bent side wall 32 includes side edge bulging protrusions 32C and 32C that bulge outside the main plate portion 38 at both side edge portions, and a lower end lateral rib 32B at the lower end portion. Yes. Further, an upper edge bulging protrusion 32 </ b> A bulging from the main plate 38 is provided at the upper end of the lower bent side wall 32. Further, as shown in FIG. 10, the lower bent side wall 32 is provided with an in-groove rib 32 </ b> L on the back side of each side edge bulging protrusion 32 </ b> C and side hooks 34 on both sides, as with the upper bent side wall 31. , 34 are provided.

  As shown in FIG. 9, on the outer surface of the lower bent side wall 32, holder fixing protrusions 35 and 35 protrude from two positions near the upper side of the lower end lateral rib 32B. Similarly to the jumping side wall 40, the card holder can be held between the holder fixing protrusions 35 and 35 and the lower end lateral rib 32 </ b> B also on the lower bent side wall 32.

  As shown in FIG. 9, a plurality of intermediate hinge components 32 </ b> K corresponding to the intermediate hinge components 31 </ b> K of the upper bent sidewall 31 are formed on the upper surface of the upper edge bulging protrusion 32 </ b> A of the lower bent sidewall 32. Is provided. The lower bent side wall 32 is formed by forming a round groove 32M opened on the outer surface side of the lower bent side wall 32 in a protruding wall 32N protruding upward from the upper surface of the upper edge bulging protrusion 32A. Further, on both sides of each intermediate hinge constituting portion 32K, an upper end protruding portion 32R formed by extending a part of the upper edge bulging protruding portion 32A upward is formed. Furthermore, a pair of cylindrical portions 32P and 32P are provided coaxially with the round groove 32M at both ends in the longitudinal direction on the upper surface of the upper edge bulging protrusion 32A. Then, the protruding wall 32N of each intermediate hinge component 32K is received between the opposing pieces 31N, 31N of the intermediate hinge component 31K, the hinge shaft 31M engages with the round groove 32M, and the side shaft portion 31P is the cylindrical portion. By engaging with 32P, the upper bent side wall 31 and the lower bent side wall 32 are rotatably connected to each other, and the intermediate hinge portion 33 (see FIG. 1) is provided between the upper and lower bent side walls 31, 32. Reference) is configured.

  A lower side portion of the lower bent side wall 32 from the lower end lateral rib 32B is a lower end connecting portion 32F. The lower end connecting portion 32F is connected to the lower surface of the lower end connecting portion 32F and the outer surface of the main plate portion 38 by a plurality of lower end protruding portions 32E, and the lower end protruding portions 32E group and the lower end portions of the main plate portions 38 are formed in an arc shape. It is curved. Further, at a plurality of positions in the left-right direction of the lower bent side wall 32, the main plate portion 38 is notched between the lower end protrusions 32E and 32E, and the hinge shaft 32D is provided between the predetermined lower end protrusions 32E and 32E. Has been handed over. The hinge shaft 32D of the lower end connection portion 32F is rotatably supported by the rotation support portion 11D of the bottom base 11, and the lower end portion of the lower bent side wall 32 is rotatably connected to the bottom base 11. A hinge mechanism is configured.

  The upper bent side wall 31 and the lower bent side wall 32 are also made of opaque resin frame members 31H and 32H constituting the entire outer edge portion, and the frame members 31H, like the jumping side wall 40 and the upper surface lid 50. , 32H is formed by integrally molding window plates 31G and 32G made of colorless and transparent resin with the inner openings closed.

  The description regarding the structure of the folding container 10 of this embodiment is above. Next, the effect of the folding container 10 is demonstrated. The folding container 10 can be changed between the assembled state shown in FIG. 1 and the folded state shown in FIGS. 17 and 18. As shown in FIG. 1, when the folding container 10 is in the assembled state, the group of side hooks 34 of the bent side wall 30 engages with the connecting piece 45 </ b> T of the jumping side wall 40, Are integrally formed, and the central engagement protrusions of the bottom base 11 are respectively provided in the central engagement recess 40R, the protrusion engagement recess 40M, and the protrusion engagement recess 40N (see FIG. 7A) of the jumping side wall 40. 11R and the locking protrusions 11K and 11M (see FIG. 6A) are engaged, and the jumping side wall 40 and the bottom base 11 are integrated. Further, a locking projection (not shown) provided on the lower surface of the front end of the locking projection 11K is engaged with a locking projection 40U (see FIG. 7A) provided on the lower surface of the projection engaging recess 40M. Thus, the jumping side wall 40 is held in the standing posture. Further, the rising wall 40 is disposed between the pair of bent side walls 30 and 30 to hold the bent side walls 30 and 30 in an upright posture, whereby the entire folding container 10 is assembled. Retained.

  When the luggage is accommodated in the folded container 10 in the assembled state and a finger is placed on the finger hooks 44, 44 or a hand is placed on the lower surface of the upper frame 20, the upper frame 20 and the upper bent side wall 31 are moved. A load is applied so that it is pulled up and down. However, in the folding container 10 of the present embodiment, in addition to a hinge mechanism that pivotally connects the upper folding side wall 31 to the upper frame 20, a fixed side sub hook 93A (see FIG. 3) and a locking curved wall 93 ( The movable side hook 37 and the fixed side hook 25 shown in FIG. 11 (A) and FIG. 19 are engaged with each other in the vertical direction, so that the upper frame 20 and the upper bent side wall 31 are vertically separated. Can be prevented.

  In order to place the folding container 10 in the folded state, the jumping side walls 40, 40 are turned inwardly about their upper ends to be in a folded posture. Then, the jumping side walls 40, 40 are disengaged upward from between the bent side walls 30, 30, and the bent side walls 30, 30 can be folded. Therefore, when the folded side walls 30, 30 are also folded after the jumping side walls 40, 40, the lower surface of the upper frame 20 overlaps the upper surface of the bottom surface surrounding wall 11S of the bottom base 11, and the entire folding container 10 is shown in FIGS. The folded state shown in FIG.

  Now, to assemble the folded folded container 10, the upper frame 20 is lifted upward. At this time, for example, if a foreign object has entered the folding container 10 and the jumping side wall 40 and the upper folding side wall 31 are caught, or the upper and lower folded side walls 31 and 32 are caught, When the frame 20 is pulled up, a load is applied so that the upper frame 20 and the upper bent side wall 31 are pulled up and down. However, in the folding container 10 of the present embodiment, the movable side hook 37 and the fixed side hook 25 are locked in the vertical direction even in the folded state as shown in FIG. And can be prevented from separating vertically.

  As described above, in the rotating side wall engaging mechanism of the folding container 10 of the present embodiment, the front end surface 37X of the movable side locking projection 37B on the upper bent side wall 31 is in the standing posture of the upper bent side wall 31. In the upper frame 20, the inner side surface 37 </ b> Y of the movable side locking projection 37 </ b> B is fixed to the upper surface 25 </ b> D of the fixed side locking projection 25 </ b> B. To the upper surface 25D. That is, not only when the upper bent side wall 31 is in the standing posture, but also when the upper bent side wall 31 is in the folded posture, the fixed side locking protrusion 25B of the upper frame 20 and the movable side locking protrusion 37B of the upper bent side wall 31 Therefore, the connection strength between the upper folding side wall 31 and the upper frame 20 in the folding posture is higher than in the conventional case.

[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 above embodiment, the “folding side wall engaging mechanism of the folding container” according to the present invention is applied between the upper folding side wall 31 and the upper frame 20. You may apply the "rotating side wall engaging mechanism of a folding container" which concerns on this invention between the upper side wall 40 and the upper frame 20. FIG.

(2) For example, the curved wall 37A is excluded from the movable side hook 37 in the folding container 10 of the above-described embodiment, and the movable side locking projection 37B is replaced with the upper end projection 31E (the “upper surface projection” according to the present invention). The “engagement rib” according to the present invention may be configured to be able to be locked to the fixed-side hook 25. In the embodiment, the movable side locking projection 37B corresponds to the “engagement rib” according to the present invention, and the distal end surface 37X of the movable side hook 37 is the “first locking surface” according to the present invention. In addition, the inward surface 37Y of the movable hook 37 corresponds to the “second locking surface” according to the present invention.

(3) Although the upper surface 25D of the fixed side locking projection 25B of the above embodiment is horizontal, the upper surface 25D of the fixed side locking projection 25B rises toward the tip of the fixed side locking projection 25B. It may be inclined like this. With such a configuration, when receiving a load that separates the upper frame 20 and the upper bent side wall 31 in the vertical direction, the movable side locking projection 37B is guided to the base end side of the fixed side locking projection 25B. The lock is deepened and stabilized.

10 Folding container 11 Bottom base 20 Upper frame 25 Fixed side hook 25A Vertical wall (axial facing wall)
25B Fixed side locking projection 25D Upper surface 25E Tip surface 25F Inclined surface 30 Bent side wall 31 Upper bent side wall (rotating side wall)
31E Upper end protrusion (first side reinforcing wall)
32 Lower bent side wall 37 Movable side hook 37A Curved wall 37B Movable side locking projection 37X Tip end surface 37Y Inward surface 40 Jump upper side wall (rotating side wall)
98 Support rib (second side reinforcement wall)
J1 rotation center axis

Claims (3)

The whole has a rectangular parallelepiped box shape, and a pair of jumping side walls and a pair of bent side walls are arranged opposite to each other between the bottom base constituting the bottom and the upper frame constituting the upper part,
The jumping side wall is rotatably connected to the upper frame only at the upper end, while the bent side wall is rotatably connected to the upper frame and the bottom base at both upper and lower ends. Among the folding containers capable of folding the pair of bent side walls upward and then folding the pair of bent side walls inward, the upper side walls or the bent side walls. In the rotating side wall engaging mechanism of the rotating side wall and the upper frame,
A movable-side hook comprising a curved wall that rises from the upper surface of the pivoting side wall and curves from the middle to the inner surface side of the pivoting side wall, and a movable side locking projection that is bent downward from the distal end of the curved wall. A shaft-facing wall that faces the pivot center axis of the pivoting side wall from the inside of the upper frame, and a fixed portion that is bent from the lower end of the shaft-facing wall to the outside of the upper frame. Provide a fixed side hook consisting of side locking projections
In the standing posture of the rotating side wall, the distal end surface of the movable side locking projection is locked to the upper surface of the fixed side locking projection, and in the folded posture of the rotating side wall, the movable side locking projection A rotating side wall engaging mechanism for a folding container, wherein an inward surface of the portion is configured to be engaged with an upper surface of the fixed side engaging projection.   First and second side reinforcing walls are provided opposite to each other with the movable side hook and the fixed side hook interposed in the axial direction of the rotational central axis of the rotational side wall, and the first side reinforcing wall is movable. 2. The folding container according to claim 1, wherein the second side reinforcing wall is formed integrally with one side of the fixed hook while being integrally formed with one side of the side hook. A moving side wall engaging mechanism. The whole has a rectangular parallelepiped box shape, and a pair of jumping side walls and a pair of bent side walls are arranged opposite to each other between the bottom base constituting the bottom and the upper frame constituting the upper part,
The jumping side wall is rotatably connected to the upper frame only at the upper end, while the bent side wall is rotatably connected to the upper frame and the bottom base at both upper and lower ends. Among the folding containers capable of folding the pair of bent side walls upward and then folding the pair of bent side walls inward, the upper side walls or the bent side walls. In the rotating side wall engaging mechanism of the rotating side wall and the upper frame,
A shaft-facing wall facing the pivot center axis of the pivoting side wall of the upper frame from the inside of the upper frame, and a fixed-side locking projection bent from the lower end of the shaft-facing wall to the outside of the upper frame. A fixed-side hook composed of a portion and an upper surface protrusion of the rotating side wall facing the fixed-side hook in the axial direction of the rotation center axis of the rotating side wall to an upper space of the fixed-side locking protrusion. Providing a protruding engagement rib,
A first locking surface that locks on the upper surface of the fixed-side locking projection in the standing posture of the rotating side wall, and the fixed-side locking projection in the folded position of the rotating side wall. And a second locking surface for locking to the upper surface of the folding container.