JP2016043938A - Folding container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a folding container which can improve intensity of a bottom wall part, and improve a transport efficiency using a roller conveyor.SOLUTION: A folding container comprises: long side wall parts which are rotatably disposed corresponding to respective long side parts of a bottom wall constitution part 2 which is a substantially rectangular plate shape; and short side wall parts which are rotatably disposed corresponding to respective short side parts of the bottom wall constitution part. In a folded state of the folding container in which, all side wall parts are at a laid position, the long side wall parts are overlapped to the upper sides of the short side wall parts. A support rib projecting downward from a bottom wall part 3 and supporting the folding container, has a rib storage part 113 for storing a reinforcement rib which is projecting to an outside surface side of the long side wall part of the folding container on a lower side when the folding containers in the folded state are stacked. In addition, a guide projection part 118 which projects downward from a lower surface of the bottom wall part 3, and extends from the vicinity of one side part of the bottom wall part 3 in the longitudinal direction to the vicinity of the other side part, is provided.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a folding container used for transporting articles.

  Conventionally, a bottom wall constituting part having a substantially rectangular plate shape and a base part protruding upward along each side part of the bottom wall part, and rotating with respect to each base part, respectively. 2. Description of the Related Art A folding container is known that includes a side wall portion that can be connected to each other and can be assembled into a box shape that opens upward, and can fold each side wall portion above a bottom wall portion. Moreover, in order to improve the efficiency at the time of transport and storage of the folding containers themselves that do not contain articles, the folding containers in the folded state can be stably stacked up and down (stacked). Some are provided (see, for example, Patent Document 1).

  More specifically, the folding container of Patent Document 1 is folded inward in such a manner that a pair of opposing long side walls are opposed to each other, and maintained at the same height position (bottom). And the other pair of short side wall portions are folded inward with the upper side portions facing each other above the previously folded long side wall portions and are the same as each other. It is maintained at the height position (supported by the long side wall portion folded first). Further, on the outer surface side of each short side wall portion, there are provided square frame-like frame ribs projecting outward along the outer peripheral edge portion, and the folding container is supported on the lower surface side of the bottom wall portion. Support ribs are provided. And when folding containers in a folded state are stacked, the support ribs of the upper folding container are configured to be inserted inside the frame ribs on the short side wall portion of the lower folding container. . In this case, the horizontal displacement of the folded containers stacked in the folded state can be prevented, and the height of the stacked folded containers can be suppressed.

Japanese Patent No. 3750795

  By the way, in patent document 1, in order to comprise so that the support rib of a bottom wall structure part may be inserted in each frame rib of a pair of short side wall part which opposes, a support rib is a pair of opposing short side wall. It is formed in a stepped shape so as to straddle the portion corresponding to the upper side portion of the frame rib of the portion. That is, the trough portion having a short protrusion length from the bottom wall portion of the support rib extends in the short direction of the bottom wall portion at an intermediate position in the longitudinal direction of the folding container (bottom wall portion). Is formed. For this reason, for example, when a pair of short side wall portions are grasped and a folding container containing an article is lifted, a portion of the bottom wall portion corresponding to a trough portion of the support rib is deformed. Is concerned.

  Moreover, when conveying a folding container using a roller conveyor, generally, a folding container will be mounted on a roller conveyor so that the longitudinal direction of a folding container and the conveyance direction of a folding container may correspond. However, when the folding container is transported by the roller conveyor, there is a concern that the roller of the roller conveyor fits into the valley portion of the support rib, and the transport of the folding container is delayed.

  The present invention has been made to solve the above-described problems and the like, and its purpose is to improve the strength of the bottom wall and to improve the conveyance efficiency using a roller conveyor. An object of the present invention is to provide a collapsible container.

  In the following, each means suitable for solving the above-mentioned purpose will be described in terms of items. In addition, the effect etc. peculiar to the means to respond | correspond as needed are added.

Means 1. A bottom wall constituting part comprising a bottom wall part having a substantially rectangular plate shape, and a base part projecting upward along each side part of the bottom wall part,
A side wall portion pivotably connected between a standing position standing above the base portion and a laying position folded above the bottom wall portion with respect to each base portion. In the folding container,
The base part includes a long side base part provided along each long side part of the bottom wall part, and a short side base part provided along each short side part of the bottom wall part,
The side wall portions are a pair of opposed long side wall portions connected to the long side base portion, and a pair of opposed short side wall portions connected to the short side base portion. With
The long side base portion is configured to have a longer protruding length from the bottom wall portion than the short side base portion, and is folded so that the short side wall portion overlaps the bottom wall portion. In a state, the long side wall portion is configured to be foldable so as to overlap above the folded short side wall portion,
On the lower surface side of the bottom wall constituting portion, a support rib is provided that protrudes downward from the lower surface of the range between the pair of long side base portions of the bottom wall portion,
On the outer surface side of the long side wall portion, there is provided a reinforcing rib having a horizontal rib extending in the width direction of the long side wall portion and a vertical rib extending in the height direction of the long side wall portion. ,
In the support rib, when the folding containers in the folded state in which all the side wall portions are in the laying position are stacked up and down (in the same direction), the long side side wall portion of the lower folding container A rib accommodating portion for accommodating the reinforcing rib is provided;
On the lower surface side of the bottom wall constituting portion, it projects downward from the lower surface of the bottom wall portion, and from the one side portion in the longitudinal direction of the bottom wall portion or in the vicinity thereof, the other side in the longitudinal direction of the bottom wall portion A folding container characterized by being provided with a guide projection that extends to the portion or the vicinity thereof.

  When forming a rib accommodating portion (vertical rib accommodating portion) for accommodating the vertical rib of the long side wall portion with respect to the support rib, the vertical rib accommodating portion is in the longitudinal direction of the bottom wall portion. It extends along the crossing direction (short direction). Therefore, there is no support rib between the vertical rib housing portions of the pair of long side wall portions (between the vertical rib housing portions of the pair of long side wall portions along the upper side of the long side wall portion. In the case where only the upper side rib accommodating portion for accommodating the extending lateral rib is present), there is a concern that the strength of the bottom wall constituting portion may be reduced when both longitudinal ends of the bottom wall constituting portion are supported. The

  In this respect, according to the means 1, since the guide protrusion extending from one side in the longitudinal direction of the bottom wall portion to the other side portion is provided on the lower surface side of the bottom wall constituting portion, in the longitudinal direction of the bottom wall portion. It becomes the appearance that a core with high strength passes, and the strength of the bottom wall constituting portion when the both longitudinal ends of the bottom wall constituting portion are supported can be increased. Therefore, for example, when a pair of short side wall portions are grasped and a folding container containing articles is lifted, a situation in which a portion of the bottom wall portion corresponding to the vertical rib accommodating portion is deformed is prevented. be able to.

  In addition, when the folding container is placed on the roller conveyor so that the longitudinal direction of the folding container coincides with the conveying direction of the folding container in order to transport the folding container using the roller conveyor, the guide protrusion Thus, it is possible to prevent the rollers of the roller conveyor from being fitted into the vertical rib accommodating portion. Accordingly, it is possible to improve the conveyance efficiency of the folding container using the roller conveyor.

  In addition, the protrusion length from the bottom wall part lower surface of a guide protrusion is below the protrusion length from the bottom wall part lower surface of a support rib.

Mean 2. The lateral rib of the long side wall portion includes an upper rib extending along the upper side portion of the long side wall portion,
The rib accommodating portion accommodates the upper side rib accommodating the upper side rib of the long side wall portion of the lower folding container when the folded containers in the folded state are stacked vertically (in the same direction). Part
The pair of long side wall portions set in the laying position are folded inward so that the upper side portions thereof are opposed to each other above the short side wall portion that has been folded first. Maintained in position,
A gap is formed between the upper sides of the pair of long-side side walls that are in the laying position, and the guide protrusions of the folding containers that are overlaid with respect to the gap are accommodated. The folding container according to means 1 described above.

  According to the means 2, when folding folding containers in the folded state, the reinforcing ribs on the long side wall of the lower folding container are not obstructed by the guide projections, and the ribs of the upper folding container are used. It can be suitably stacked so as to be inserted into the accommodating portion. Therefore, by shortening the protrusion length of the guide protrusion, while avoiding the situation where the effect of improving the strength of the bottom wall of the means 1 and improving the conveyance efficiency of the roller conveyor is reduced, in the folded state The height of the stacked folding containers can be suppressed.

Means 3. The guide protrusion includes a pair of longitudinal ribs extending in parallel with each other in the longitudinal direction of the guide protrusion, and a connecting rib that extends in a direction intersecting the extending direction of the longitudinal rib and connects the longitudinal ribs. And with
The folding container according to claim 1 or 2, wherein the protruding length of the guide protrusion from the bottom wall is the same as the protruding length of the support rib from the bottom wall.

  According to the means 3, the strength of the guide protrusion itself can be increased, and the situation where the guide protrusion itself is deformed can be suppressed. Further, the lateral width of the guide protrusion in the short direction of the bottom wall portion is widened, and it is possible to improve the stability when being conveyed by the roller conveyor. Furthermore, since the guide protrusions are grounded together with the support ribs and support the folding container, it is possible to more reliably prevent the deformation of the bottom wall part.

It is a perspective view of the folding container in an assembly state. It is a perspective view of the folding container in a folded state. It is a perspective view which shows the upper surface side of a bottom wall structure part. It is a partial expansion perspective view which shows the J section of FIG. It is a perspective view which shows the lower surface side of a bottom wall structure part. It is a perspective view which shows the outer surface side of a long side wall part. It is a perspective view containing the partial cross section of a long side wall part. It is a perspective view which shows the outer surface side of a short side wall part. It is a perspective view which shows the inner surface side of a short side wall part. It is a perspective view containing the partial cross section of a short side wall part. It is a perspective view containing the partial cross section of a short side wall part. It is a perspective view containing the partial cross section of the folding container in an assembly state. It is a perspective view which shows the folding container stacked in the folding state. It is a perspective view including the partial cross section of the folding container stacked in the folded state. It is sectional drawing at the time of cut | disconnecting the folding container stacked in the folded state along the transversal direction of a bottom wall part. It is a perspective view of the folding container stacked including the cross section of FIG. It is sectional drawing at the time of cut | disconnecting the folding container stacked in the folded state along the longitudinal direction of a bottom wall part. It is a perspective view of the folding container stacked including the cross section of FIG.

  Hereinafter, an embodiment will be described with reference to the drawings. As shown in FIGS. 1, 3, etc., the folding container 1 protrudes upward from the bottom wall portion 3 along the bottom wall portion 3 having a substantially rectangular plate shape and the long side portions of the bottom wall portion 3. A bottom wall constituting part 2 comprising a long side base part 4, a short side base part 5 protruding upward from the bottom wall part 3 along each short side part of the bottom wall part 3, and each long side A long side wall 6 provided to be rotatable with respect to the side base 4 and a short side wall 7 provided to be rotatable with respect to each short side 5 are provided. ing. In the present embodiment, the bottom wall constituting part 2, the long side wall part 6, and the short side wall part 7 are made of polypropylene.

  The long side wall portion 6 and the short side wall portion 7 are respectively provided in a standing position (see FIG. 1) standing above the long side base portion 4 and the short side base portion 5, and the bottom wall portion 3. It is configured to be able to rotate and displace between a laying position (see FIG. 2) that is folded upward and extends in parallel with the bottom wall portion 3. Moreover, in this embodiment, the protrusion length from the bottom wall part 3 of the long side base part 4 is longer than the protrusion length from the bottom wall part 3 of the short side base part 5, and it mentions later in detail. The formation position of the long side bearing portion 43 for rotatably supporting the long side wall portion 6 is also the formation position of the short side bearing portion 52 for rotatably supporting the short side wall portion 7. It is located above. Furthermore, each short side base part 5 is provided so that the inner surfaces of a pair of opposing long side base part 4 may be connected. For this reason, in this embodiment, unless the short side wall part 7 is folded first, the long side wall part 6 cannot be folded. Then, as shown in FIG. 2, in the folded state of the folding container 1 in which all the long side wall portions 6 and the short side wall portions 7 are in the sleeping position, the short side wall portions 7 are formed on the bottom wall portion 3. The long side wall 6 is folded so as to overlap (facing) the upper surface, and is folded so as to overlap the upper side of the short side wall 7 that has already been folded (FIG. 18). reference).

  In addition, in this embodiment, the height of the laying position of the pair of short side wall portions 7 is aligned, and the height of the laying position of the pair of long side wall portions 6 is aligned. Thereby, the height of the folding container 1 in a folded state can be lowered, and improvement in transportation efficiency and storage efficiency can be achieved. Moreover, the protrusion length from the bottom wall part 3 of the short side base part 5 is substantially the same as the thickness of the short side wall part 7, and the upper edge of the short side wall part 7 in the laying position and the short side The upper edge of the side base part 5 is substantially the same height. Furthermore, the protrusion length from the bottom wall part 3 of the long side base part 4 is substantially the same as the sum of the thickness of the long side wall part 6 and the short side wall part 7, and is the length at the laying position. The upper edge of the side wall portion 6 and the upper surface of the long side base portion 4 have substantially the same height.

  As shown in FIG. 1, FIG. 6, FIG. 7, etc., each long side wall portion 6 has substantially the same width as the length in the longitudinal direction of the long side base portion 4, and the folding container 1 is assembled in a box shape. In the assembled state, a substantially flat long-side base plate 11 constituting the inner surface of the long-side side wall 6 and a long-side upper-side rib extending outward from the upper side of the long-side base plate 11 12, a long side lower rib 13 extending outward from the lower side of the long side base plate 11, and a long side hinge 14 protruding downward from the lower surface of the long side lower rib 13. Yes. The long side hinge portion 14 includes a substantially rod-shaped connecting portion 15 that extends vertically downward from the lower surface of the long side lower rib 13 and a long side wall portion from both side surfaces of the distal end portion of the connecting portion 15. 6 and a pair of shaft portions 16 projecting along the lateral width direction, and has a substantially T-shape as a whole.

  In addition, as shown in FIG. 6 and the like, the long side base plate 11 has an inner surface of the long side base plate 11 at the upper part on both sides (the inner side of the bottom wall portion 3 is faced in the upright position and in the laid position). A locking wall 17 projecting from the lower surface is provided. Each locking wall 17 is formed with an insertion hole 18 penetrating in the lateral width direction of the long side wall portion 6.

  As shown in FIG. 1, FIG. 8, FIG. 9, etc., each short side wall 7 has a width substantially the same as the length of the short side base 5 in the longitudinal direction, and the folding container 1 is assembled in a box shape. In the assembled state, a substantially flat short-side base plate 21 constituting the inner surface of the short-side side wall 7 and a short-side upper rib extending outward from the upper side of the short-side base plate 21. 22, a short side lower side rib 23 extending outward from the lower side part of the short side base plate 21, and a short side hinge part 24 protruding downward from the lower surface of the short side lower side rib 23. Yes. Similar to the long side hinge part 14, the short side hinge part 24 of the short side wall part 7 includes a connecting part 25 and a shaft part 26 and has a substantially T shape.

  In addition, the short side base plate 21 is provided with insertion protrusions 27 that protrude from the outer surface of the short side base plate 21 at upper portions of both sides. The insertion protrusion 27 is provided corresponding to the insertion hole 18 formed in the locking wall 17 of the long side wall portion 6. Then, after the long side wall portion 6 is erected, the short side wall portion 7 is erected, whereby the insertion protrusion 27 is inserted into the insertion hole 18 and the insertion protrusion 27 of the short side base plate 21 is The peripheral part is supported by the locking wall 17 (see FIG. 1).

  Further, as shown in FIGS. 1 and 8 and the like, on the outer surface side of the short side wall 7, the inner wall of the short side wall 7 is prevented from falling down below the short side upper rib 22. A lock mechanism installation portion 29 in which the lock mechanism 28 is installed is provided. As shown in FIG. 1, the lock mechanism 28 slides along the width direction of the short side wall 7 on both sides of the operation unit 30 provided at the center in the width direction of the lock mechanism installation portion 29. The left and right sides of the short side base plate 21 that can be projected and retracted with respect to the rear region of the portion that is supported by contacting the locking wall 17 of the long side wall 6 in the assembled state of the folding container 1. A pair of slide pieces 31 is provided.

  On the other hand, the long side wall 6 is provided with a locking projection (not shown) that locks with the inner surface of the tip of the slide piece 31 protruding into the rear region in the assembled state of the folding container 1. It has been. Further, by operating the operation unit 30, the pair of slide pieces 31 are interlocked so that the locked state between the slide piece 31 and the locking convex portion can be released. In addition, about the slide piece 31 and the operation part 30, it is urged | biased by the side by which the latching state of the slide piece 31 and a latching convex part is maintained by the elastic piece which is not shown in figure.

  Further, as shown in FIGS. 8 and 10, on the outer surface side of the short side wall portion 7, outward from the outer surface of the short side base plate 21 below the lock mechanism installation portion 29, the short side side Intermediate lateral ribs 32 extending from the left and right side portions of the short side base plate 21 to the other side portions are provided so as to be substantially parallel to the upper side ribs 22. In addition, the short-side base plate 21 includes a portion below the intermediate lateral rib 32 (in the height direction intermediate position of the short-side base plate 21) and including a central portion in the horizontal width direction of the short-side base plate 21. A handle opening 33 is formed that penetrates in the thickness direction of the short-side base plate 21 and allows the operator to insert a hand and lift the folding container 1 when carrying the assembled folding container 1. .

  Further, as shown in FIG. 9, on the inner surface side of the short side base plate 21, a handle cover 34 (FIG. 1) that closes the handle opening 33 at a portion below the handle opening 33. A cover latching portion 35 for latching is provided. The handle cover 34 is made of a flexible material (for example, low density polyethylene) and is pressed by the operator's hand inserted into the handle opening 33 so that the handle cover 34 is opened. It is displaced and deformed following the opening. Further, on the inner surface side of the short side base plate 21, a cover mounting portion formed such that the inner surface is recessed outwardly by the thickness of the handle cover 34 in a range where the handle cover 34 is mounted. 36 is provided. Furthermore, there is substantially no gap between the inner peripheral surface of the cover mounting portion 36 and the handle cover 34 mounted on the cover mounting portion 36. For this reason, the inner surface of the handle cover 34 attached to the cover attachment portion 36 and the inner surface of the short side base plate 21 are flush with each other (continuous surface). The cover locking portion 35 is formed in the cover mounting portion 36 so as not to protrude inward from the inner surface of the short side base plate 21.

  As shown in FIG. 1, FIG. 3, FIG. 4, etc., the long side base 4 constitutes the inner surface of the folding container 1 in the assembled state, and extends along the long side of the bottom wall 3. An inner wall portion 41 projecting upward from the upper surface of the inner wall portion 41, and an upper wall portion 42 extending outward from the upper edge portion of the inner wall portion 41. Each long side base portion 4 is formed with a long side bearing portion 43 that pivotally supports the shaft portion 16 of the long side hinge portion 14 of the long side wall portion 6. The long side bearing portion 43 cuts out the upper wall portion 42 so that the tip of the long side hinge portion 14 can be inserted from above on the outer surface side of the inner wall portion 41 and opens the long side base portion 4 upward. At the same time, the inner wall portion 41 is notched to form an opening so as to allow the rotational displacement of the connecting portion 15 of the long side hinge portion 14, and outward from the upper edge of the inner wall portion 41 on both sides of the opening. It is configured by providing a protruding hook portion 44. The shaft portion 16 is hooked on the lower surface side of the hook portion 44 of the long side bearing portion 43 and pivotally supported, so that the long side wall portion 6 is rotatably supported by the long side base portion 4. Yes.

  As shown in FIG. 1, FIG. 3, FIG. 4, etc., the short side base 5 constitutes the inner surface of the folding container 1 in the assembled state, and extends along the short side of the bottom wall 3. An inner wall portion 51 that protrudes upward from the upper surface of the first side wall portion, and a short side bearing portion 52 that pivotally supports the shaft portion 26 of the short side hinge portion 24 of the short side wall portion 7. The short side bearing portion 52 is basically configured in the same manner as the long side bearing portion 43, and the shaft portion 26 of the short side hinge portion 24 is pivotally supported by the hook portion 53 of the short side bearing portion 52. It has come to be. In addition, the short side base portion 5 opens upward and outward, and when the long side wall portion 6 is in the laying position, the locking wall 17 of the long side wall portion 6 and the locking convex portion Is formed with a retaining wall accommodating recess 54 (see FIG. 18 and the like). Thus, when the long side wall 6 is displaced to the laying position, the locking wall 17 and the like are prevented from interfering with the short side base 5 and the long side that is set to the laying position. When a force is applied to the side wall portion 6 in the horizontal direction, the long side side wall portion 6 is prevented from being displaced without imposing a burden on the long side side hinge portion 14 of the long side side wall portion 6. Can do.

  As shown in FIGS. 8, 10, 11, and the like, the short side wall 7 of the present embodiment is the outer surface of the short side base plate 21 on both lateral sides of the short side base plate 21. The side reinforcing plate 61 extending along the height direction of the short side wall 7 and the side of the short side base plate 21 on the side of the central portion in the width direction of each side reinforcing plate 61. A connecting plate portion 62 that connects the side portion and the outer surface of the short side base plate 21 is provided. The upper side of the side reinforcing plate 61 is connected to the lower surface of the intermediate lateral rib 32, and the lower side of the side reinforcing plate 61 is connected to the upper surface of the short side lower rib 23. Note that the reinforcing portion inner space 63 surrounded by the short side base plate 21, the side reinforcing plate portion 61, and the connecting plate portion 62 opens toward the side of the short side base plate 21. In addition, the reinforcing portion inner space 63 (a wall portion or the like constituting the reinforcing portion space) is formed by a slide mold that is slidable in the lateral width direction of the short side base plate 21.

  Further, in the reinforcing portion inner space 63, an inner space reinforcing rib 64 that connects the short side base plate 21, the side reinforcing plate portion 61, and the connecting plate portion 62 is provided. The in-space reinforcing rib 64 extends in a direction orthogonal to the height direction of the short side wall 7. Further, a plurality of in-space reinforcing ribs 64 are provided at a predetermined distance from each other in the height direction of the short side wall 7.

  In addition, as shown in FIG. 10, the short side wall portion 7 is provided on the short side wall portion 7 on both sides of the handle opening 33 while facing the outer surface of the short side base plate 21. A horizontal reinforcing plate portion 65 extending along the horizontal width direction is provided. In the present embodiment, each horizontal reinforcing plate portion 65 has an upper side portion connected to the lower surface of the intermediate horizontal rib 32, and an end portion on the side side portion of the short side base plate 21 has a side reinforcing portion. It is connected to the upper end of the side edge of the plate part 61. Further, among the horizontal reinforcing plate portions 65, the short portion of the short side base plate 21 on the side in the horizontal width direction is along the left and right side edges of the handle opening 33, respectively. It is connected with the handle vertical edge rib 66 which protruded outward. In addition, a space surrounded by the horizontal reinforcing plate portion 65, the short side base plate 21 and the intermediate horizontal rib 32 is opened downward, and is slidable in the height direction of the short side wall portion 7. Molded with a mold.

  Further, as shown in FIGS. 8 and 10, the short side wall 7 has a handle bottom projecting outward from the short side base plate 21 along the lower edge of the handle opening 33. Intermediate reinforcing plate portions 68 extending from the left and right end portions of the front end edge of the edge rib 67 toward the lower side (short side lower rib 23 side) while facing the outer surface of the short side base plate 21 are provided. ing. Each intermediate reinforcing plate portion 68 is provided with an intermediate first connecting portion in which the side portions on both sides in the width direction of the short side base plate 21 are provided so as to extend the respective handle vertical edge ribs 66 downward. The plate part 69 is connected. In addition, an intermediate second connecting plate portion 70 that connects the side portion of the intermediate side reinforcing plate portion 68 in the lateral direction of the short side wall portion 7 and the short side base plate 21 is provided. .

  Further, in the present embodiment, the middle reinforcing space 71 (which is surrounded by the intermediate reinforcing plate portion 68, the short side base plate 21, the intermediate first connecting plate portion 69, and the intermediate second connecting plate portion 70) is formed. A wall portion or the like) is formed by three molds. More specifically, as shown in FIG. 9, the short side base plate 21 is formed with an intermediate first opening 72 at a portion facing the upper portion of the intermediate reinforcing plate portion 68, so that a middle reinforcing space is formed. The upper part of 71 is formed by a mold for forming the inner surface side of the short side wall 7. In the present embodiment, the intermediate first opening 72 is formed in the cover attachment portion 36 to which the handle cover 34 is attached, and the intermediate first opening 72 is held by the attachment of the handle cover 34. The hand cover 34 is closed.

  Further, as shown in FIG. 8 and the like, the intermediate reinforcing plate portion 68 is formed with an intermediate second opening 73 at a position below the intermediate first opening 72, and the intermediate portion of the middle reinforcing space 71 is short. It is molded by a mold for molding the outer surface side of the side wall portion 7. In addition, an intermediate third opening 74 for opening the middle reinforcing space 71 downward is formed in the short side lower rib 23, and a lower portion of the middle reinforcing space 71 is formed on the short side wall 7. Molded by a mold for molding the lower surface side.

  Further, the intermediate reinforcing plate portion 68 extends so as to extend upward, and the upper side portion of the intermediate reinforcing plate portion 68 and the side portion on the lateral side central portion side of the short side wall portion 7 of the horizontal reinforcing plate portion 65. A connecting wall 75 is provided to connect the two. The connecting wall 75 of the present embodiment has a substantially triangular shape so as to close the lower portions on both sides of the opening 33 for the handle.

  Furthermore, the distance from the outer surface of the short side base plate 21 to the intermediate reinforcing plate portion 68, the distance from the outer surface of the short side base plate 21 to the outer surface of the horizontal reinforcing plate portion 65, and the short side base plate 21 The distances from the outer surface to the outer surfaces of the side reinforcing plate portion 61 and the connecting wall 75 are the same. In this embodiment, as shown in FIG. 1, the left side reinforcing plate portion 61, the left intermediate reinforcing plate portion 68, the connecting wall 75 extending upward from the intermediate reinforcing plate portion 68, and the connection A substantially sheet-like card insert 76 capable of inserting and supporting the lower portion of the card is attached to these outer surfaces so as to straddle the horizontal reinforcing plate portion 65 continuous with the wall 75.

  Further, as shown in FIG. 5 and the like, a base formation in which a long side base portion 4 and a short side base portion 5 are formed on the upper surface side of the bottom wall portion 3 on the lower surface side of the bottom wall constituting portion 2. A support rib 82 that protrudes downward from the lower surface of the inner peripheral side of the range 81 and a bottom reinforcing portion 83 that protrudes downward from the lower surface of the bottom wall portion 3 in the base formation range 81 are provided. The protruding length of the support rib 82 from the bottom wall portion 3 and the protruding length of the bottom reinforcing portion 83 from the bottom wall portion 3 are the same length, and the bottom reinforcing portion 83 supports the folding container 1 together with the supporting rib 82. It is the composition to do.

  In the present embodiment, four bottom reinforcing portions 83 (hereinafter, also referred to as “long side bottom reinforcing portions 84”) are provided in portions corresponding to the long side base portions 4 in the base forming range 81, respectively. Two bottom reinforcing portions 83 (hereinafter also referred to as “short side bottom reinforcing portions 87”) are provided at portions corresponding to the short side base portions 5, respectively. The long side side bottom portion reinforcing portion 84 has a substantially U-shaped cross section that opens to the center side in the short width direction of the bottom wall portion 3 and is reinforced by vertical ribs provided on the inside thereof. Moreover, the short side bottom portion reinforcing portion 87 has a cylindrical shape that opens downward.

  On the other hand, as shown in FIG. 2 etc., the upper side of the folding container 1 in the folded state is opened upward in the folded state of the folding container 1, and the folding containers 1 in the folded state are vertically moved in the same direction. An accommodation recess 88 is provided in which the bottom reinforcing portion 83 of the folding container 1 stacked on the upper side is accommodated when stacked on top of each other.

  More specifically, of the four long side bottom reinforcing portions 84 provided along the long side portions of the bottom wall portion 3, the two long portions located on both sides in the longitudinal width direction of the bottom wall portion 3. An accommodation recess 88 (hereinafter also referred to as “first long side accommodation recess 89”) for accommodating the side bottom reinforcement 84 (hereinafter also referred to as “first long side bottom reinforcement 85”) is illustrated in FIG. 2, 15, 16, etc., the long side of the long side bearing part 43 formed on the long side base part 4, the long side side formed on both ends in the longitudinal direction of the long side base part 4 It is comprised by the long side hinge part 14 of the long side side wall part 6 pivotally supported by the bearing part 43 and the said long side side bearing part 43 concerned.

  In other words, the first long side bottom reinforcing portion 85 has a size that can be inserted into the long side bearing 43 at a position corresponding to the long side bearing 43 that forms the first long side receiving recess 89. In the long side hinge part 14 that has a shape and constitutes the first long side accommodating recess 89, in order to allow insertion of the first long side side bottom reinforcing part 85 into the long side bearing part 43, A notch 91 (see FIGS. 7, 16, etc.) is formed at the tip. In the present embodiment, the long-side hinge portion 14 (and the short-side hinge portion 24) and the long-side bearing portion 43 (and the short-side bearing portion 52) constitute a hinge means, and the first long The side housing recess 89 constitutes a hinge accommodating housing recess.

  Moreover, as shown in FIG. 6 etc., the long side hinge part 14 of this embodiment is the sum total in the horizontal width direction center part of the long side wall part 6, the both ends vicinity part, and each of those intermediate parts. Five are provided. Among them, the long-side hinge part 14 other than the central long-side hinge part 14 is formed with an attachment hole 92 penetrating in the thickness direction of the long-side side wall part 6 in the connecting part 15.

  On the other hand, as shown in FIGS. 15 and 16, the mounting hole 92 has a rectangular plate shape corresponding to the opening formed in the inner wall portion 41 in order to form the long side bearing portion 43. A gap cover 93 including a plate 94 and a locking piece 96 protruding from the back surface of the closing plate 94 and having a claw portion 95 at the tip is attached. As shown in FIGS. 1 and 12, when the folding container 1 is in an assembled state, the long side hinge portion 14 and the long side bearing portion 43 are provided by the gap cover 93 attached to the attachment hole 92. Is prevented from being exposed to the inside of the folding container 1. In the present embodiment, the long-side hinge portion 14 and the gap cover 93 attached to the long-side hinge portion 14 constitute a hinge-compatible partition wall portion.

  Further, the long side hinge portion 14 in which the attachment hole 92 is not formed is configured such that the surface facing inward in the assembled state of the folding container 1 is flush with the inner surface of the long side base plate 11. Yes. On the other hand, the long side hinge portion 14 in which the attachment hole 92 is formed is provided at a position shifted outward from the inner surface of the long side base plate 11 by the thickness of the closing plate 94 of the gap cover 93. ing. Thereby, it is comprised so that the surface of the clearance cover 93 and the inner surface of the long side base board 11, and by extension, the inner surface of the long side base part 4 (inner wall part 41) may become flush.

  Each short side wall portion 7 is also provided with five short side hinges 24 and mounting holes 92 are formed in the short side hinges 24 other than the central short side hinge 24. In addition, a gap cover 93 is attached.

  Moreover, as shown in FIG.2, FIG.13, FIG.14, on the upper surface of the long side base part 4, apart from the long side bearing part 43, it opens upwards and the folding containers 1 in the folding state are mutually connected. When stacked, the long side bottom reinforcing portions 84 (hereinafter also referred to as “second long side bottom reinforcing portions 86”) other than the first long side bottom reinforcing portions 85 of the folding containers 1 stacked on the upper side. ) Are respectively formed (hereinafter also referred to as “second long-side storage recesses 90”).

  Furthermore, as shown in FIGS. 4 and 14, the upper surface of the long-side base portion 4 is formed on the center side in the short width direction of the bottom wall portion 3 with respect to the second long-side housing recess 90. A base-supporting partition wall 97 is provided to prevent the second long side accommodation recess 90 from being exposed to the inside of the folding container 1 when the folding container 1 is in the assembled state. In the present embodiment, the portion on the inner wall portion 41 side of the upper surface (upper wall portion 42) of the long side base portion 4 is left as it is. By forming the second long side accommodating recess 90 that opens to the side of the bottom wall 3 in the short width direction, a base is formed on the inside (the center side of the bottom wall 3 in the short width direction). A corresponding partition wall 97 is formed. For this reason, the upper side part of the base corresponding | compatible partition wall part 97 is flush | planar with the upper surface of the long side base part 4 (upper wall part 42).

  The second long side bottom reinforcing part 86 is located on the side of the bottom wall part 3 in the lateral width direction with respect to the first long side bottom reinforcing part 85. In the present embodiment, the second long-side accommodation recess 90 constitutes a base-compatible accommodation recess.

  In addition, as shown in FIGS. 6 and 12, the long side wall portion 6 is provided with a gap prevention convex portion 98 that protrudes downward from the lower side portion of the long side base plate 11. In this embodiment, the gap prevention convex part 98 is a range (between the pair of short side wall parts 7) that does not overlap the short side wall part 7 in the assembled state of the folding container 1 in the long side wall part 6. Range).

  On the other hand, as shown in FIG. 4, the boundary portion between the upper wall portion 42 and the inner wall portion 41 of the long side base portion 4 is set in an upright position along the longitudinal direction of the long side base portion 4. A gap preventing recess 99 for accommodating the gap preventing projection 98 of the long side wall 6 is formed. With this configuration, it is possible to improve the design and prevent misalignment of the abutting portion between the long-side side wall portion 6 and the long-side base portion 4 that are in the standing position. In addition, the depth (distance from the upper wall portion 42 to the bottom surface) of the second long side accommodation recess 90 is configured to be deeper than the depth of the gap prevention recess 99. In addition, as shown in FIG. 8, with respect to the short side wall portion 7, a gap prevention convex portion 98 protruding downward from the lower side portion of the short side base plate 21 is provided, and as shown in FIG. 4, The short side base portion 5 is formed with a gap prevention concave portion 99 into which the gap prevention convex portion 98 is inserted in the assembled state of the folding container 1.

  In addition, as shown in FIGS. 2, 17, and 18, the folding container 1 that is in a folded state on both sides is provided on the outer surface side of the long side wall 6 that is exposed upward in the folded state of the folding container 1. The short side accommodation recessed part 100 as the crossing side corresponding | compatible accommodation recessed part in which the short side bottom part reinforcement part 87 of the folding container 1 piled up on the upper side is accommodated is provided. In addition, about the short side accommodation recessed part 100, when stacking the outer surface of the long side base board 11, and the folding containers 1 in a folded state, insertion of the short side bottom part reinforcement part 87 is permitted, and The bottom wall 3 is constituted by a reinforcing rib 101 erected on the outer surface of the long side base plate 11 so as to substantially contact the short side bottom reinforcing part 87 in the longitudinal width direction.

  In the present embodiment, the folding containers 1 in an assembled state are stacked in the long side upper rib 12 of the long side wall 6 and the short side upper rib 22 of the short side wall 7. In such a case, an assembling recess 102 is formed in which the bottom reinforcing portion 83 of the folding container 1 stacked on the upper side is accommodated. When the folding containers 1 in an assembled state are stacked, the support ribs 82 of the upper folding container 1 are the inner circumferences of the long side wall 6 and the short side wall 7 of the lower folding container 1. The bottom reinforcing part 83 of the upper folding container 1 is accommodated in the assembling accommodating recess 102 of the lower folding container 1 and the bottom wall part 3 (base formation range 81 of the upper folding container 1 is inserted. ) Is in contact with and supported by the long side upper rib 12 and the short side upper rib 22 of the lower folding container 1.

  As shown in FIGS. 2, 6, etc., the reinforcing rib 101 provided on the outer surface side of the long side wall 6 is not only the long side upper rib 12 and the long side lower rib 13, but also a long rib. A longitudinal rib 111 extending along the height direction of the long side wall 6 is provided so as to connect the side upper rib 12 and the long side lower rib 13. Further, in the present embodiment, in order to further strengthen the vicinity of the upper side of the long side wall 6, a parallel rib extending in parallel with the long side upper rib 12 at a predetermined distance from the long side upper rib 12. Two 112 are provided. In this embodiment, the long side upper rib 12, the parallel rib 112, the vertical rib 111, and a part of the long side lower rib 13 (the connecting portion with the long side hinge 14 and both sides in the longitudinal direction). The outer side portion (the leading edge in the protruding direction from the long side base plate 11) is configured to have substantially the same height as the upper surface of the long side base portion 4 in the folded state of the folding container 1. In the present embodiment, the long side upper rib 12, the long side lower rib 13, and the parallel rib 112 constitute a horizontal rib.

  Now, as shown in FIGS. 5 and 15 to 18, when the folding containers 1 in a folded state are stacked on the support rib 82, the long side wall 6 of the lower folding container 1 is stacked. A rib housing portion 113 in which the reinforcing rib 101 is housed (inserted) is provided. More specifically, the rib accommodating portion 113 includes an upper side rib accommodating portion 114 that collectively accommodates the long side upper rib 12 of each long side wall portion 6 and two parallel ribs 112, and each vertical rib 111. And a lower rib receiving portion 116 for receiving the long side lower rib 13. By providing the rib accommodating portion 113, when the folding containers 1 in a folded state are stacked, the reinforcing rib 101 of the long side wall 6 of the lower folding container 1 and the support rib 82 of the upper folding container 1 are provided. Interference with can be avoided. Accordingly, it is possible to perform stacking such that the folding containers 1 are prevented from shifting in the horizontal direction while suppressing the height of the folding containers 1 stacked up and down. Furthermore, as described above, the bottom reinforcing portion 83 of the upper folding container 1 can be reliably accommodated in the accommodating recess 88 of the lower folding container 1.

  Further, as shown in FIG. 5, in the present embodiment, on the lower surface side of the bottom wall constituting portion 2, it protrudes downward from the lower surface of the bottom wall portion 3, and passes through the central portion in the short width direction of the bottom wall portion 3. Thus, a guide protrusion 118 extending along the longitudinal direction of the bottom wall 3 is provided. In this embodiment, in the range on the inner peripheral side of the base formation range 81 in the bottom wall portion 3, from the vicinity of one side portion in the longitudinal direction of the bottom wall portion 3 to the vicinity of the other side portion (a pair of short side base portions) (In the corresponding part between 5) extending continuously.

  In addition, the guide protrusion 118 extends in a direction intersecting the extending direction of the longitudinal rib 119 and a pair of longitudinal ribs 119 extending parallel to each other in the longitudinal direction of the guide protrusion 118, and between the longitudinal ribs 119. And a connecting rib 120 for connecting the two. Further, the protruding length of the guide protrusion 118 from the bottom wall 3 is the same as the protruding length of the support rib 82 from the bottom wall 3.

  Further, as shown in FIGS. 2 and 16, in the present embodiment, the distance between the pair of long side base portions 4 is configured to be longer than twice the height of the long side base plate 11. In the folded state of the folding container 1, a gap 117 is formed between the upper side portions (long side side upper ribs 12) of the pair of long side side wall portions 6 in the laying position. That is, in the present embodiment, as shown in FIG. 5 and the like, the guide protrusion 118 is a pair of upper side rib accommodating portions 114 for accommodating the respective long side upper side ribs 12 and the like of the pair of long side side wall portions 6. Between the two. And when the folding containers 1 in the folded state are stacked, as shown in FIGS. 15 and 16, the above-mentioned formed between the upper sides of the pair of long side wall portions 6 of the lower folding container 1. The guide protrusion 118 of the upper folding container 1 is accommodated in the gap 117.

  As described above in detail, according to the present embodiment, when the folding containers 1 in a folded state are stacked on the support rib 82 provided on the lower surface side of the bottom wall constituting portion 2, the lower folding container is provided. A rib accommodating portion 113 that accommodates (allows for insertion) the reinforcing rib 101 formed on the outer surface side of the pair of long side wall portions 1 is provided. As a result, in the folded state of the folding container 1, the outer surface of the long side wall portion 6 facing upward (the outer side portion of the reinforcing rib 101) and the upper surface of the long side base portion 4 are at the same height. Even when the folded folding containers 1 are stacked, interference between the support ribs 82 of the upper folding container 1 and the reinforcing ribs 101 of the long side wall 6 of the lower folding container 1 is caused. Can be avoided. Therefore, the folding container 1 can be overlapped by inserting the support rib 82 from above into the inside of the long side wall portion 6 of the folding container 1 in the folded state, and the horizontal direction can be reduced while suppressing the height. It is possible to reliably stack the folding containers 1 in the folded state in which misalignment is prevented.

  By the way, when forming the vertical rib accommodating part 115 for accommodating the vertical rib 111 of the long side wall part 6 with respect to the support rib 82, the said vertical rib accommodating part 115 is the length of the bottom wall part 3. It will extend along the direction (short direction) orthogonal to a direction. Therefore, there is no support rib 82 between the vertical rib housing portions 115 of the pair of long side wall portions 6 (the long side upper ribs between the vertical rib housing portions 115 of the pair of long side wall portions 6). In the case where only the upper rib accommodating portion 114 for accommodating 12 is present), there is a concern that the strength of the bottom wall constituting portion 2 may be lowered when both longitudinal ends of the bottom wall constituting portion 2 are supported. Is done.

  In this regard, according to the present embodiment, since the guide protrusion 118 extending from the vicinity of one side in the longitudinal direction of the bottom wall 3 to the vicinity of the other side is provided on the lower surface side of the bottom wall component 2, the bottom It becomes like a core having high strength in the longitudinal direction of the wall portion 3, and the strength of the bottom wall constituting portion 2 when the both ends in the longitudinal direction of the bottom wall constituting portion 2 are supported can be increased. Therefore, when the user inserts his / her hand into the opening 33 for the handle formed in the pair of short side wall portions 7, grasps the upper portion thereof, and lifts the folding container 1 containing the article, the bottom wall portion 3. It is possible to prevent a situation in which a portion corresponding to the vertical rib accommodating portion 115 is deformed.

  Further, when the folding container 1 is placed on the roller conveyor so that the longitudinal direction of the folding container 1 and the transporting direction of the folding container 1 coincide with each other in order to transport the folding container 1 using a roller conveyor. The guide protrusion 118 can prevent the roller of the roller conveyor from being fitted into the vertical rib accommodating portion 115. Accordingly, it is possible to improve the conveyance efficiency of the folding container 1 using a roller conveyor.

  Further, when the folding container 1 is in the folded state, a gap 117 is formed between the upper sides of the pair of long side wall portions 6 that are in the laying position, and the folded folding containers 1 are stacked. In this case, the guide protrusion 118 of the folding container 1 stacked on the upper side with respect to the gap 117 is accommodated. For this reason, when stacking the folded folding containers 1, the reinforcing ribs 101 of the long side wall 6 of the lower folding container 1 are not obstructed by the guide protrusion 118, and the upper folding container is used. It is possible to suitably stack them so as to be inserted into one rib housing portion 113. Therefore, by shortening the protrusion length of the guide protrusion 118, in the folded state, while avoiding the situation where the above-described effects such as improvement of the strength of the bottom wall portion 3 and improvement of the conveyance efficiency of the roller conveyor are diminished, The height of the stacked folding containers 1 can be suppressed.

  In addition, the guide protrusion 118 extends in a direction intersecting the extending direction of the longitudinal rib 119 and a pair of longitudinal ribs 119 extending parallel to each other in the longitudinal direction of the guide protrusion 118, and between the longitudinal ribs 119. And a connecting rib 120 for connecting the two. For this reason, the intensity | strength of guide protrusion 118 itself can be raised, and the situation that guide protrusion 118 itself deform | transforms can be suppressed. Further, the lateral width of the guide projection 118 in the width direction of the bottom wall 3 is widened, so that it is possible to improve the stability when conveyed by the roller conveyor. Further, the protruding length of the guide protrusion 118 from the bottom wall 3 is the same as the protruding length of the support rib 82 from the bottom wall 3. Thereby, since the guide protrusion 118 is grounded together with the support rib 82 and supports the folding container 1, the deformation and the like of the bottom wall portion 3 can be more reliably prevented.

  Further, the bottom wall constituting portion 2 of the present embodiment is located on the inner peripheral side of the base formation range 81 where the long side base portion 4 and the short side base portion 5 are formed on the upper surface side of the bottom wall portion 3. A support rib 82 protruding downward from the lower surface of the part is provided. As a result, when the folding containers 1 in an assembled state are stacked, the support ribs 82 of the upper folding container 1 are connected to the long side wall 6 and the short side wall 7 of the lower folding container 1. While inserting (substantially fitting) to the inner peripheral side, the lower side wall portion 6 and the short side wall of the lower folding container 1 are used as the lower surface of the bottom wall part 3 of the upper folding container 1 in the base formation range 81. The upper part of the part 7 can be brought into contact with and supported.

  Further, the bottom wall constituting portion 2 includes a bottom reinforcing portion 83 that protrudes downward from the lower surface of the bottom wall portion 3 in the base formation range 81. Thereby, it is an outer peripheral part of the bottom wall part 3, and suppresses the deformation | transformation of the base formation range 81 which will support each long side wall part 6 and the short side wall part 7 in the assembly state of the folding container 1. Can do. In particular, in the present embodiment, the protruding length of the bottom reinforcing portion 83 from the bottom wall portion 3 is the same as the protruding length of the supporting rib 82, and the bottom reinforcing portion 83 is configured to support the folding container 1 together with the supporting rib 82. Therefore, the effect of suppressing the deformation of the base formation range 81 of the bottom wall portion 3 is further exhibited.

  Moreover, the folding containers 1 in an assembled state are arranged on the upper side portion (long side upper rib 12) of the long side wall portion 6 and the upper side portion (short side upper rib 22) of the short side wall portion 7. In the case of stacking, the assembling recess 102 for receiving the bottom reinforcing portion 83 of the upper folding container 1 is provided. Thereby, when the folding containers 1 in an assembled state are stacked, the bottom reinforcing part 83 of the upper folding container 1 interferes with the upper side part of the long side wall part 6 and the short side wall part 7, The situation where it becomes impossible to insert the support rib 82 in the inner peripheral side of the long side wall part 6 and the short side wall part 7 can be avoided.

  In addition, on the upper surface side of the folding container 1 in the folded state, when the folded containers 1 in the folded state are stacked, an accommodation recess 88 for accommodating the bottom reinforcing portion 83 of the upper folding container 1 is provided. Yes.

  More specifically, among the long side bottom reinforcement portions 84 provided along the long sides of the bottom wall 3, positions in the vicinity of both ends in the longitudinal direction of the bottom wall 3 (near the corner of the bottom wall 3) The first long-side housing recess 89 for housing the first long-side bottom reinforcing portion 85 provided at the position) is a long-side bearing portion 43 formed on the long-side base 4 and It is comprised by the long side hinge part 14 pivotally supported. For this reason, both the long side bearing portion 43 (long side hinge portion 14) and the bottom reinforcing portion 83 (first long side bottom reinforcing portion 85) are brought as close as possible to the corner portion of the bottom wall constituting portion 2. Can be provided. Therefore, for example, as in the case where the bottom reinforcing portion 83 (the first long side bottom reinforcing portion 85) is formed at a position relatively far from the corner portion of the bottom wall constituting portion 2, the bottom reinforcing portion 83 and the first reinforcing portion 83 are formed. 1 It is impossible to support the vicinity of both side portions of the long side wall portion 6 connected to the long side base portion 4 by the long side bottom portion reinforcing portion 85, and comparison is made at both side portions of the long side wall portion 6. It is possible to avoid a situation in which a large rattling occurs. Further, for example, the corner portion of the bottom wall portion 3 can be supported by the bottom portion reinforcing portion 83 as in the case where the bottom portion reinforcing portion 83 is formed at a position relatively far from the corner portion of the bottom wall constituting portion 2. Therefore, it is possible to avoid a situation in which the corner portion of the bottom wall portion 3 is relatively easily deformed. As a result, it is possible to prevent the corner portion of the bottom wall portion 3 from being deformed and improve the stability of the rotation operation of the long side wall portion 6.

  Further, separately from the long side bearing portion 43, the long side base portion 4 is formed so as to open upward on the upper surface of the long side base portion 4, and folding containers in a folded state are stacked. In this case, a second long side accommodating recess 90 is provided in which the second long side bottom reinforcing part 86 of the folding container 1 stacked on the upper side is accommodated. In this way, the second long side housing recess 90 that can accommodate the bottom reinforcing portion 83 (second long side bottom reinforcing portion 86) is not related to the long side bearing portion 43 (the bottom reinforcing portion 83 is accommodated). By forming (for the purpose of doing only), the shape of the second long side accommodating recess 90 is made more like the bottom reinforcing portion 83 (second long side bottom reinforcing portion 86) (without worrying about the function of the hinge or the like). ). Therefore, in a state where the folding containers 1 in the folded state are stacked, the inner side surface of the second long side accommodating recess 90 of the lower folding container 1 and the bottom of the second long side side of the upper folding container 1 are reinforced. The outer peripheral surface of the part 86 can be substantially brought into contact with each other, and the horizontal displacement between the stacked folding containers 1 can be more reliably prevented. Moreover, since the 2nd long side accommodation recess 90 is formed in the long side base part 4, the outer peripheral surface of the bottom part reinforcement part 83 on the inner surface of the accommodation recessed part 88 formed in the long side side wall part 6, for example As compared with the case where the shift of the bottom reinforcing portion 83 in the horizontal direction is restricted and the horizontal movement of the bottom reinforcing portion 83 is restricted, the effect of preventing the displacement is high, and the stacked state can be stabilized.

  Further, the folding container 1 is in an assembled state in the long-side base portion 4 so as to be adjacent to the second long-side accommodation recess 90 on the center side in the short width direction of the bottom wall portion 3. In this case, a base-compatible partition wall 97 that prevents the second long-side accommodation recess 90 from being exposed to the inside of the folding container 1 is provided. For this reason, when the folding container 1 is in the assembled state, the second long side accommodation recess 90 is exposed inside the folding container 1, and the bottom wall constituting part 2 (long side side base part 4) and the long side A situation in which a gap is formed between the side wall portion 6 and the side wall portion 6 can be prevented. Therefore, when an article is taken in and out of the folding container 1, it is possible to prevent such a situation that the article is caught in a gap (step) formed on the inner surface of the folding container 1.

  In addition, in the present embodiment, the folding container 1 is in an assembled state with respect to the first long side accommodation recess 89 configured by the long side bearing portion 43 and the long side hinge portion 14 (mainly the notch portion 91). In this case, it is exposed to the inside of the folding container 1 by the long-side hinge portion 14 constituting the first long-side housing recess 89 and the gap cover 93 attached to the long-side hinge portion 14. This has been prevented. Thereby, when the folding container 1 is in the assembled state, the first long side accommodation recess 89 is exposed inside the folding container 1, and the bottom wall constituting part 2 (long side base part 4) and the long side A situation in which a gap is formed between the side wall portion 6 and the side wall portion 6 can be prevented.

  In particular, the attachment hole 92 is intentionally formed in the long side hinge part 14, and the gap cover 93 is attached to the attachment hole 92, so that the gap between the long side hinge part 14 and the long side bearing part 43 is between. It is possible to close the gap more accurately. Therefore, when an article is taken in and out of the folding container 1, it is possible to more reliably prevent such a situation that the article is caught in a gap (step) formed on the inner surface of the folding container 1. Further, by attaching the gap cover 93 to the long side hinge portion 14, the strength of the long side hinge portion 14 can be improved.

  Further, on the outer surface side of the long side wall 6, when the folded containers 1 in a folded state are stacked on both sides, a short side bottom reinforcing portion 87 of the folded container 1 stacked on the upper side is provided. A short side housing recess 100 is provided for housing. For this reason, in the base formation range 81 of the bottom wall part 3, the bottom part is not only on the back side of the long side base part 4 exposed upward in the folded state of the folding container 1 but also on the back side of the short side base part 5. The reinforcement part 83 (short side bottom part reinforcement part 87) can be provided. Therefore, the effect of suppressing the deformation of the base formation range 81 of the bottom wall 3 is further exhibited.

  In addition, the short side wall portion 7 of the present embodiment has a height of the short side wall portion 7 while facing the outer surface of the short side base plate 21 on both lateral sides of the short side base plate 21. A side reinforcing plate portion 61 extending along the direction, a side portion of the side reinforcing plate portion 61 on the side in the lateral direction center portion of the short side base plate 21, and an outer surface of the short side base plate 21. And a connecting plate portion 62 for connecting the two. For this reason, since both sides of the short side wall portion 7 have a double wall structure of the short side base plate 21 and the side reinforcing plate portion 61, the compressive strength of the side wall portion is dramatically increased. Can do. Further, the reinforcing portion inner space 63 surrounded by the short side base plate 21, the side reinforcing plate portion 61, and the connecting plate portion 62 opens toward the side of the short side base plate 21. The reinforcing portion inner space 63 (the surface constituting it) can be formed by a slide mold. Therefore, for example, productivity (formability) is improved and manufacturing cost is suppressed as compared with a case where both sides of the short side wall 7 are formed into a double wall structure by gas forming the reinforcing portion inner space 63. Can be achieved. Further, for example, as compared with a case where a slide mold for forming the reinforcing portion inner space 63 is cut in the height direction of the short side wall portion 7 (longitudinal direction of the side reinforcing plate portion 61), such a slide die is used. While improving the intensity | strength of a type | mold, the improvement of die cutting workability | operativity can be aimed at.

  In addition, in the reinforcing portion inner space 63, an inner space reinforcing rib 64 that connects the short side base plate 21, the side reinforcing plate portion 61, and the connecting plate portion 62 is provided. For this reason, deformation of the side reinforcing plate portion 61 and the connecting plate portion 62 and relative displacement with respect to the short side base plate 21 can be prevented more reliably, and the strength at both side portions of the short side wall portion 7 can be further increased. It can be further enhanced.

  Furthermore, the short side wall portion 7 extends in the transverse direction intersecting the longitudinal direction of the side reinforcing plate portion 61 while facing the outer surface of the short side base plate 21, and one end portion in the longitudinal direction is the side portion. The horizontal reinforcing plate portion 65 connected to the reinforcing plate portion 61 and the lateral side central portion side of the short side base plate 21 from the side reinforcing plate portions 61 are opposed to the outer surface of the short side base plate 21. However, an intermediate reinforcing plate 68 extending in the vertical direction intersecting the longitudinal direction of the horizontal reinforcing plate 65 is provided. As described above, the provision of the horizontal reinforcing plate portion 65 and the intermediate reinforcing plate portion 68 increases the double wall structure of the short side wall 7 and improves the strength of the short side wall 7. Can be achieved.

  Further, since the horizontal reinforcing plate portion 65 is connected to the side reinforcing plate portion 61 and the horizontal reinforcing plate portion 65 is also connected to the intermediate reinforcing plate portion 68 via the connecting wall 75, they are mutually connected. It can support and the further strength improvement of the short side wall part 7 can be aimed at. Furthermore, the distance from the outer surface of the short side base plate 21 to the outer surface of the side reinforcing plate portion 61, the distance from the outer surface of the short side base plate 21 to the outer surface of the horizontal reinforcing plate portion 65, and the short side base The distance from the outer surface of the plate 21 to the intermediate reinforcing plate portion 68 is the same, and the outer surface of the side reinforcing plate portion 61, the outer surface of the horizontal reinforcing plate portion 65, the outer surface of the intermediate reinforcing plate portion 68, and the connecting wall The outer surface of 75 is flush. Thus, a comparatively large card slot 76 is compared across the outer surface of the side reinforcing plate portion 61, the outer surface of the horizontal reinforcing plate portion 65, the outer surface of the intermediate reinforcing plate portion 68, and the outer surface of the connecting wall 75. It can be applied neatly and firmly.

  In addition, by applying the above-described configuration of the double wall structure to the pair of short side wall portions 7, a force from above is applied to the long side wall portion 6 of the folding container 1 in the assembled state. Even in this case, both sides of the long side wall 6 can be firmly supported by the pair of short side walls 7 locked to both sides of the long side wall 6. For this reason, buckling of the long side wall 6 can be reliably suppressed.

  In addition, in the present embodiment, an intermediate first opening 72 is formed with respect to the short side base plate 21 in order to mold the upper inner surface of the intermediate reinforcing plate 68. Thereby, the improvement of the moldability of the said part can be aimed at. Further, since the intermediate first opening 72 is formed in the cover mounting portion 36 to which the handle cover 34 is mounted, the intermediate first opening 72 together with the handle opening 33 is formed by the handle cover 34. 72 is also blocked. Therefore, when an article is taken in and out of the folding container 1, it is possible to avoid such a situation that the article is caught in the handle opening 33 or the intermediate first opening 72.

  In addition, it is not limited to the description content of the said embodiment, For example, you may implement as follows. Of course, other application examples and modification examples not illustrated below are also possible.

  (A) In the folded state of the folding container 1, when the gap 117 is formed between the pair of long side wall portions 6 at the laying position and the folding containers 1 in the folded state are stacked, the upper folding container The one guide protrusion 118 is configured to be accommodated in the gap 117 of the lower folding container 1, but the gap 117 is not formed so that the guide protrusion 118 is accommodated. Also good. However, when the gap 117 is not (sufficiently) formed, the protruding length of the guide protrusion 118 is shortened or the folded folding container 1 of the reinforcing rib 101 is folded in order to stack the folding containers 1 in the folded state. It is necessary to shorten the projecting length of the portion corresponding to the guide protrusion 118 (for example, the long side upper rib 12 or the parallel rib 112 of the long side wall 6). Since there is a concern that the height of the folded folding container 1 may increase, it is preferable to form the gap 117.

  In addition, in the above-described embodiment, the rib accommodating portion 113 is configured such that no rib protruding from the lower surface of the bottom wall portion 3 is formed. For example, the support ribs 82 are connected so as to connect the support ribs 82. It is good also as providing the rib whose projection length is shorter than.

  (B) In the above embodiment, the bottom reinforcing portion 83 provided in the base forming range 81 of the bottom wall portion 3 includes the long side bearing portion 43 and the long side hinge portion 14 (notch portion 91). The first long side bottom reinforcing portion 85 housed in the first long side housing recess 89 and the second long side housing recess 90 formed separately from the long side bearing portion 43 in the long side base 4 A second long side bottom reinforcing part 86 to be accommodated and a short side bottom reinforcing part 87 to be accommodated in the short side accommodating recess 100 formed on the outer surface side of the long side wall part 6 are provided. However, it is not particularly limited to such a configuration. However, in the case where the folding containers 1 in the folded state are stacked, the support rib 82 of the upper folding container 1 is inserted into the long side wall portion 6 of the lower folding container 1 in the first configuration. By providing the long side bottom reinforcing part 85, both the first long side bottom reinforcing part 85, the corresponding long side bearing 43, and the long side hinge part 14 are connected to the bottom wall as much as possible. It can be provided close to the corner portion of the component 2, and by providing the second long side bottom reinforcing portion 86, it is possible to stabilize the stacked state of the folding container 1 in the folded state, Furthermore, by providing the short-side-side bottom reinforcing portion 87, it is possible to prevent deformation at the short-side portion of the bottom wall portion 3, etc., so that various types of bottom-side reinforcing portions 83 are applied in combination as much as possible. Is desirable.

  In addition, when adopting a configuration in which the short-side-side bottom portion reinforcing portion 87 is omitted, the support rib 82 is provided in the entire region in the longitudinal width direction of the bottom wall portion 3 in the range between the pair of long-side base portions 4. You may comprise. However, as in the above-described embodiment, the support rib 82 is not formed in the base formation range 81 without changing the height of the upper side portion of the long side wall portion 6 and the short side wall portion 7. It is also possible to stack the folding containers 1 in an assembled state.

  Moreover, in the said embodiment, the 1st long side bottom part reinforcement part 85 is formed by forming the notch part 91 in a front-end | tip part with respect to the long side hinge part 14 which comprises the 1st long side accommodation recessed part 89. FIG. For example, the folding container 1 is in a folded state in the long side hinge part 14 constituting the first long side accommodating recess 89. In some cases, a recess may be formed as an accommodation recess that opens upward, and the first long side bottom reinforcing portion 85 may be inserted (accommodated) into the recess.

  (C) In the above embodiment, the protruding length of the bottom reinforcing portion 83 from the bottom wall portion 3 is the same as the protruding length of the support rib 82 from the bottom wall portion 3, and both support the folding container 1. However, the protruding length of the bottom reinforcing portion 83 from the bottom wall portion 3 may be configured to be shorter than the protruding length of the support rib 82 from the bottom wall portion 3. In this case, the bottom reinforcing portion 83 is not directly configured to contact the installation surface and support the bottom wall portion 3, but by providing the bottom reinforcing portion 83, the strength of the bottom wall portion 3 is improved. Therefore, the effect of suppressing the deformation | transformation of the base formation range 81 of the bottom wall part 3 is still show | played. However, when adopting a configuration in which the bottom reinforcing portion 83 is directly grounded to the installation surface, the effect of suppressing the deformation of the base formation range 81 of the bottom wall portion 3 is more remarkably exhibited.

  (D) In the above embodiment, the attachment holes 92 are formed in the long side hinge part 14 and the short side hinge part 24 and the gap cover 93 is attached to the attachment hole 92. 92 and the gap cover 93 are omitted, and in the assembled state of the folding container 1, the long-side bearing portion 43 and the short-side side are provided by the long-side hinge portion 14 and the short-side hinge portion 24 (particularly the connecting portions 15 and 25). You may comprise so that the bearing part 52 may be prevented from being exposed inside the folding container 1.

  Moreover, in the said embodiment, the lock mechanism 28 is abbreviate | omitted, and the elasticity which supports the long side wall part 6 in contact with the inner surface side of the short side wall part 7 in the assembly state of the folding container 1 instead. A locking piece may be provided.

  (E) In the above embodiment, the side reinforcing plate portion 61, the horizontal reinforcing plate portion 65, and the intermediate reinforcing plate portion 68 are provided on the short side wall portion 7. It is not limited, The site | part, range, etc. which are set as a double wall structure can be suitably set according to the shape of the short side wall part 7, etc. However, by providing the side reinforcing plate portions 61 on both sides in the width direction of each short side wall 7, the compressive strength in the height direction of the short side wall 7 can be effectively increased, and both sides The deformation of the long side wall portion 6 connected to the short side wall portion 7 can be effectively suppressed by the short side wall portion 7 with the increased strength of the portion. Furthermore, when the handle opening 33 or the like is formed, it is possible to more reliably prevent such a portion from being deformed by making the peripheral edge portion a double wall structure. It should be noted that a double wall structure may be applied to the long side wall 6 instead of or in addition to the short side wall 7 having a double wall structure.

  (F) In the above embodiment, the handle opening 33 is formed in the short side wall 7, but instead of or in addition to this, the handle opening in the long side wall 6. 33 may be formed. However, the opening 33 for the handle is provided in the pair of short side wall portions 7 (having a double wall structure) including the side reinforcing plate portion 61, the horizontal reinforcing plate portion 65, and the intermediate reinforcing plate portion 68. By forming, the strength reduction of the short side wall 7 due to the formation of the opening 33 for the handle can be sufficiently compensated. The handle opening 33 may be omitted. When such a configuration is adopted, the handle cover 34 is not attached, so that it is desirable not to form an opening such as the middle first opening 72 in the short side base plate 21. Further, when the handle opening 33 is not formed on the short side wall 7, the intermediate reinforcing plate 68 is extended upward to the intermediate lateral rib 32 and connected to the horizontal reinforcing plate 65. You may comprise.

  (G) In the said embodiment, although the folding container 1 is comprised by the polypropylene, it is good also as comprising by other resin materials, such as polyethylene, PET, and polyamide.

  DESCRIPTION OF SYMBOLS 1 ... Folding container, 2 ... Bottom wall structure part, 3 ... Bottom wall part, 4 ... Long side side base part, 5 ... Short side side base part, 6 ... Long side side wall part, 7 ... Short side wall part, DESCRIPTION OF SYMBOLS 12 ... Long side side upper side rib, 14 ... Long side side hinge part, 24 ... Short side side hinge part, 43 ... Long side side bearing part, 52 ... Short side side bearing part, 81 ... Base formation range, 82 ... Supporting rib DESCRIPTION OF SYMBOLS 101 ... Reinforcement rib, 111 ... Vertical rib, 112 ... Parallel rib, 113 ... Rib accommodating part, 114 ... Upper side rib accommodating part, 115 ... Vertical rib accommodating part, 117 ... Gap, 119 ... Longitudinal rib, 120 ... Connection rib.

Claims (3)

A bottom wall constituting part comprising a bottom wall part having a substantially rectangular plate shape, and a base part projecting upward along each side part of the bottom wall part,
A side wall portion pivotably connected between a standing position standing above the base portion and a laying position folded above the bottom wall portion with respect to each base portion. In the folding container,
The base part includes a long side base part provided along each long side part of the bottom wall part, and a short side base part provided along each short side part of the bottom wall part,
The side wall portions are a pair of opposed long side wall portions connected to the long side base portion, and a pair of opposed short side wall portions connected to the short side base portion. With
The long side base portion is configured to have a longer protruding length from the bottom wall portion than the short side base portion, and is folded so that the short side wall portion overlaps the bottom wall portion. In a state, the long side wall portion is configured to be foldable so as to overlap above the folded short side wall portion,
On the lower surface side of the bottom wall constituting portion, a support rib is provided that protrudes downward from the lower surface of the range between the pair of long side base portions of the bottom wall portion,
On the outer surface side of the long side wall portion, there is provided a reinforcing rib having a horizontal rib extending in the width direction of the long side wall portion and a vertical rib extending in the height direction of the long side wall portion. ,
When the folding containers in the folded state in which all the side wall portions are in the laying position are stacked up and down, the supporting ribs accommodate the reinforcing ribs on the long side wall portions of the lower folding container. A rib receiving portion is provided,
On the lower surface side of the bottom wall constituting portion, it projects downward from the lower surface of the bottom wall portion, and from the one side portion in the longitudinal direction of the bottom wall portion or in the vicinity thereof, the other side in the longitudinal direction of the bottom wall portion A folding container characterized by being provided with a guide projection that extends to the portion or the vicinity thereof. The lateral rib of the long side wall portion includes an upper rib extending along the upper side portion of the long side wall portion,
The rib accommodating portion includes an upper rib accommodating portion that accommodates the upper rib of the long side wall portion of the lower folding container when the folding containers in the folded state are stacked up and down.
The pair of long side wall portions set in the laying position are folded inward so that the upper side portions thereof are opposed to each other above the short side wall portion that has been folded first. Maintained in position,
A gap is formed between the upper sides of the pair of long-side side walls that are in the laying position, and the guide protrusions of the folding containers that are overlaid with respect to the gap are accommodated. The folding container according to claim 1. The guide protrusion includes a pair of longitudinal ribs extending in parallel with each other in the longitudinal direction of the guide protrusion, and a connecting rib that extends in a direction intersecting the extending direction of the longitudinal rib and connects the longitudinal ribs. And with
The folding container according to claim 1, wherein a protruding length of the guide protrusion from the bottom wall is the same as a protruding length of the support rib from the bottom wall.

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