JP2014166884A - Folding container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a folding container excellent in workability when assembling into a box shape.SOLUTION: A container 10 of a square box shape composed of a hollow plate material includes: a bottom wall 11; and respective pairs of short side walls 12 and long side walls 13 standing along short side edges and long side edges of the bottom wall 11. The short side walls 12 and the long side walls 13 are foldable inward onto the bottom wall 11, in a way that they are stacked one after another. Portion above a notch 13a on the side edge of the long side wall 13 is attached with side edge frames 40, and on the bottom wall 11, support members 50 supporting the side edge frames 40 are attached. The support members 50 are provided with mount parts 52. The mount parts 52 are provided with suppression parts (mount surfaces 52a) which are formed to project inward of the side edge frames 40 and suppress inward rotation of the long side walls 13.

Description

  The present invention relates to a rectangular box-like folding container made of a synthetic resin hollow plate.

  As disclosed in Patent Document 1, in recent years, a container made of a synthetic resin hollow plate material such as plastic corrugated cardboard is used from the viewpoint of weight reduction and the like. The container of patent document 1 is formed in the square box shape provided with the square-plate-shaped bottom wall and the 1st side wall and the 2nd side wall which are standingly arranged by the periphery of the bottom wall. Then, the first side wall is overlaid on the bottom wall and the second side wall is overlaid on the first side wall, with the folds formed by thermal bending provided on the side walls as pivot axes. Moreover, the engaging member is each attached to each side edge of the 1st side wall of the container of patent document 1, and a 2nd side wall. By engaging the engaging member, the adjacent first side wall and second side wall are connected, and the first side wall and the second side wall are held upright.

JP 2000-118529 A

  When assembling the container of Patent Document 1 from a folded state into a box shape, after rotating the second side wall upward, the first side wall is similarly rotated upward, and the engaging member of the first side wall An operation of engaging the engaging member of the second side wall is performed. Here, during the operation of rotating the first side wall, the operator needs to support the second side wall previously rotated so as not to fall down. However, the first side wall is supported while supporting the two second side walls. The operation of rotating the is a complicated operation. Therefore, the container of Patent Document 1 has a problem that workability at the time of assembly is poor.

  The present invention has been made in view of these conventional situations, and an object of the present invention is to provide a folding container that is excellent in workability when assembled into a box shape in a folding container made of a synthetic resin hollow plate material. It is in.

  A folding container for achieving the above object comprises a hollow plate made of a synthetic resin having a core layer forming a hollow structure therein and skin layers disposed on both sides of the core layer, and has a rectangular plate-like bottom. A rectangular box-like container comprising a wall and a pair of opposing first and second side walls standing on the periphery of the bottom wall, overlapping the first side wall on the bottom wall, and In the folding container configured to be foldable inward by overlapping the second side wall on the first side wall, the second side wall has a cut portion that leaves the inner skin layer on the second side wall. The second side wall is formed along a lower side, and is configured to be folded inward by bending the inner skin layer at the cut portion, and the side edge frame is formed on the side of the second side wall. Said notch at the edge And a support member that supports the side edge frame is attached to at least one of the bottom wall and the lower part from the notch in the side edge of the second side wall, The support member includes a mounting portion on which a lower end surface of the side edge frame is mounted. The supporting portion is formed to protrude inward from the side edge frame, and is inward of the second side wall. A suppressing portion that suppresses the rotation to is provided.

  According to the said structure, when assembling in a box shape, the standing state of the 2nd side wall previously rotated upward can be hold | maintained. That is, by providing the restraining portion that protrudes inwardly on the mounting portion of the support member, when the standing second side wall is about to rotate inward, the side edge frame attached to the second side wall is In contact with the suppression portion, the inward rotation of the second side wall is suppressed. As a result, when the folding container is assembled into a box shape, the standing state of the second side wall can be maintained without the assistance of the operator, and the subsequent operation of rotating the first side wall easily can be performed. Can do. Therefore, workability at the time of assembling into a box shape is improved.

  According to the folding container of this invention, the workability | operativity at the time of assembling in a box shape improves.

The perspective view of the folding container which made the 2nd side wall stand from the folded state. The perspective view of a folding container. (A) is sectional drawing around the notch part of the 1st side wall, (b) is sectional drawing around the notch part of the 2nd side wall. (A), (b) is a perspective view of a side edge frame. (A) is a front view of an engagement frame, (b) is a perspective view of an engagement frame. (A) is a perspective view of a support member, (b) is a top view of a support member. The enlarged view around the corner of the bottom wall. (A) is sectional drawing of the mounting part of the side edge frame and supporting member in the middle of standing up the 2nd side wall, (b) is mounting of the side edge frame and supporting member in the state which stood up the 2nd side wall. (C) is a sectional view taken along line 8-8 in FIG. 2, and (d) is a sectional view of a side edge frame and a locking recess of a supporting member in the middle of standing a second side wall.

Hereinafter, the folding container of this invention is demonstrated based on drawing.
As shown in FIG. 2, a bottomed box-like folding container 10 (hereinafter simply referred to as a container 10) that opens upward includes a long square plate-like bottom wall 11 and a short side of the bottom wall 11 that faces each other. A pair of short side walls 12 (first side walls) erected along the edges and a pair of long side walls 13 (second side walls) erected along the opposing long side edges of the bottom wall 11 are provided. Yes. As shown in FIG. 1, the container 10 is configured to be foldable by folding a pair of short side walls 12 on the bottom wall 11 and then folding the pair of long side walls 13 on the short side wall 12. Has been.

  The bottom wall 11, the short side wall 12, and the long side wall 13 of the container 10 are formed of a synthetic resin hollow plate material having a hollow structure therein. Specifically, the cross-shaped plate material in which the portion serving as the short side wall 12 and the portion serving as the long side wall 13 are integrated with the four side edges of the long square portion serving as the bottom wall 11, respectively, The bottom wall 11, the short side wall 12, and the long side wall 13 are formed by bending in a box shape along the four side edges. As shown in FIG. 3, the hollow plate material includes a core layer 21 that forms a hollow structure therein, and skin layers 22 and 23 that are bonded to both surfaces of the core layer 21.

  As shown in FIGS. 2 and 3A, a cut portion 12 a formed along the lower side of the short side wall 12 is provided in the lower portion of the short side wall 12. The cut portion 12 a is formed from the outer surface side of the short side wall 12, and cuts the skin layer 22 and the core layer 21 located on the outer surface side of the short side wall 12 while leaving the skin layer 23 located on the inner surface side of the short side wall 12. This is a half cut. The short side wall 12 can be folded inward by bending a portion of the inner skin layer 23 remaining in the cut portion 12a to open the cut portion 12a. That is, the inner skin layer 23 portion remaining in the cut portion 12a functions as a hinge.

  As shown in FIGS. 2 and 3B, a similar notch 13 a is also provided at the lower part of the long side wall 13. The long side wall 13 can be folded inward by bending the inner skin layer 23 portion remaining in the cut portion 13a to open the cut portion 13a. However, the cut portion 13 a of the long side wall 13 is formed at a position higher than the cut portion 12 a of the short side wall 12. Specifically, the cut portion 13 a of the long side wall 13 is formed at a position higher than the upper surface of the bottom wall 11 by the thickness of the short side wall 12. Thereby, when the long side wall 13 is folded, a space S that can accommodate the short side wall 12 is secured between the bottom wall 11 and the long side wall 13.

  As shown in FIGS. 1 and 2, the bottom wall 11, the short side wall 12, and the long side wall 13 made of a hollow plate material have the purpose of improving the strength of the container 10 and maintaining the box shape. Various reinforcing members are attached.

  Specifically, support members 50 are attached to the four corners of the bottom wall 11. The engagement frame 30 is attached to a portion above the notch 12a at the side edge of the short side wall 12, and the side edge frame is at a portion above the notch 13a at the side edge of the long side wall 13. 40 is attached. An upper edge frame 60 is attached to each upper edge of the short side wall 12 and the long side wall 13, that is, the opening edge of the container 10. These reinforcing members are members made of synthetic resin that are molded by injection molding, extrusion molding, or the like separately from the bottom wall 11, the short side wall 12, and the long side wall 13.

  As shown in FIGS. 4A and 4B, the side edge frame 40 attached to the long side wall 13 is a plate-like member having an L-shaped cross section that extends in the vertical direction as a whole, and is fixed to the long side wall 13. A fixed wall portion 41 and an engaging wall portion 42 projecting inwardly (from the side of the short side wall 12) from the side edge of the fixed wall portion 41. An insertion recess 43 for inserting a side edge of the long side wall 13 is provided on the inner side end surface of the fixed wall portion 41. A protrusion 44 that engages with the upper edge frame 60 is provided at a position above the insertion recess 43 on the same side end surface. In addition, a pair of locking protrusions 45 having a hook shape are provided on the lower end surface of the fixed wall portion 41.

  The engagement wall portion 42 is a portion that engages with the engagement frame 30 attached to the short side wall 12 in the assembled state, and is formed to extend in the vertical direction along the outer side edge of the fixed wall portion 41. ing. The engagement wall portion 42 is provided with three engagement holes 42 a penetrating vertically through the engagement wall portion 42, and an engagement groove 42 b is recessed in the side end surface of the engagement wall portion 42. ing.

  As shown in FIGS. 5A and 5B, the engagement frame 30 attached to the short side wall 12 is a plate-like member having a substantially pentagonal shape when viewed from the front. An insertion recess 31 for inserting a side edge of the short side wall 12 is provided from the inner side end surface to the lower end surface of the engagement frame 30. A protrusion 32 that engages with the upper edge frame 60 is provided on the upper side of the same end surface.

  On the outer surface side of the engagement frame 30, an engagement recess 33 having a rectangular shape in front view is provided. In the engagement recess 33, three engagement protrusions 34 that protrude in the thickness direction of the engagement frame 30 are arranged side by side. Further, a slot 35 having an opening toward the engagement recess 33 side is provided on the outer surface side of the engagement frame 30, and a lock member 36 is accommodated in the slot 35. In the slot 35, the lock member 36 is configured to be slidable between a protruding position where the tip portion protrudes into the engaging recess 33 and an accommodation position where the tip portion is accommodated in the slot 35. In addition, an operation window 35a is provided on the wall portion of the engagement frame 30 on the outer surface side of the slot 35, and the lock member 36 can be operated via the operation window 35a.

  As shown in FIG. 5A, a hemispherical regulation protrusion 36 a is provided on the inner surface side of the lock member 36. The wall of the engagement frame 30 on the inner surface side of the slot 35 accommodates the restricting protrusion 36a when the lock member 36 is in the protruding position and when it is in the accommodated position, thereby positioning the lock member 36. A first restriction hole 35b and a second restriction hole 35c are provided. A slit 35d is provided between the first restriction hole 35b and the second restriction hole 35c.

  The width of the slit 35d is set to be smaller than the outer diameter of the restricting protrusion 36a. Therefore, the lock member 36 can be slid between the housing position and the protruding position only when a force is applied to the lock member 36 so that the restricting projection 36a passes through the slit 35d.

  As shown in FIGS. 6A and 6B, the support member 50 stands from the lower wall portion 50 a disposed on the bottom wall 11 and the side edge of the lower wall portion 50 a along the outer surface of the short side wall 12. The vertical wall part 50b provided and the horizontal wall part 50c erected from the side edge of the lower wall part 50a along the outer surface of the long side wall 13 are provided. An insertion recess 51 for inserting the edges of the short side wall 12 and the long side wall 13 is provided on the lower surface side of the lower wall portion 50a.

  A placement portion 52 on which the fixed wall portion 41 of the side edge frame 40 is placed is provided on the inner surface side of the lateral wall portion 50c. The upper surface of the mounting portion 52 is a mounting surface 52a for mounting the lower end surface of the fixed wall portion 41, and the width H of the mounting surface 52a (the width in the thickness direction of the long side wall 14) is fixed wall. It is set to be wider than the width of the lower end surface of the portion 41.

  Locking recesses 53 are respectively provided on both sides of the mounting portion 52 on the inner surface side of the horizontal wall portion 50c. The locking recess 53 is a portion into which a tip of a locking projection 45 provided at the lower end of the fixed wall portion 41 of the side edge frame 40 is inserted, and in the folded state, an inner wall that forms the locking recess 53 It is comprised so that the latching protrusion 45 formed in a hook shape may engage (refer FIG.8 (d)).

  FIG. 7 is an enlarged view of the periphery of the corner of the bottom wall 11 with the side edge frame 40 and the support member 50 removed. As shown in FIG. 7, a notch C is provided in the lower side edge portions of the short side wall 12 and the long side wall 13, and the lower portion of the side edge frame 40 and the support member 50 are attached to the notch C. The notch C is formed so as to leave the portions 12b and 13b below the notches 12a and 13a in the short side wall 12 and the long side wall 13, and the remaining portions 12b and 13b are the support members 50. Is inserted into the insertion recess 51.

  As shown in FIG. 2, the upper edge frame 60 is a bar-shaped member having a U-shaped cross section having a groove on the lower surface side thereof, the upper edges of the short side wall 12 and the long side wall 13 in the groove, and the engagement. The projections 32 and 44 of the frame 30 and the side edge frame 40 are inserted to be fixed to the opening edge of the container 10. A gripping member 61 is attached to the short side wall 12.

Next, the effect | action of the container 10 of this embodiment is described.
When the container 10 is not in use, such as during storage, the side walls are folded. Specifically, the short side wall 12 is folded inward so as to overlap the bottom wall 11, and The long side wall 13 is folded inward so as to overlap. And the container 10 is made into the state assembled in the box shape by the operator as needed.

  As shown in FIGS. 8A and 8D, when the container 10 in the folded state is assembled in a box shape, first, the inner skin layer 23 portion remaining in the cut portion 13a of the long side wall 13 is rotated. As the moving shaft, the long side wall 13 is rotated 90 degrees upward, and the fixed wall portion 41 of the side edge frame 40 is placed on the placement portion 52 of the support member 50.

  At this time, as shown in FIG. 8 (d), the fixed wall portion 41 of the side edge frame 40 with respect to the outer wall surface (lateral wall portion 50 c) of the locking recess 53 in the locking recess 53 of the support member 50. The corners of the locking projections 45 provided on the abutment abut. Then, the side edge frame 40 rotates while slightly lifting upward with the contact portion P between the wall surface (lateral wall portion 50c) of the locking recess 53 and the corner portion of the locking projection 45 as a fulcrum. As a result, the lower end surface of the fixed wall portion 41 climbs over the mounting surface 52 a over the corner of the mounting portion 52 of the support member 50. Then, the fixed wall portion 41 is placed on the placement portion 52 of the support member 50, and the long side wall 13 is erected. In addition, illustration of the short side wall 12 is abbreviate | omitted in Fig.8 (a)-(d).

  In the state where the long side wall 13 is erected, the inward rotation of the long side wall 13 is suppressed, and the long side wall 13 can maintain the erected state without the assistance of the operator. As shown in FIGS. 8B and 8C, the width of the placement surface 52 a of the placement portion 52 of the support member 50 is formed wider than the width of the lower end surface of the fixed wall portion 41. Therefore, when the long side wall 13 is erected, the placement surface 52 a is in a state of projecting inward from the fixed wall portion 41.

  As a result, as shown by a two-dot chain line in FIG. 8C, even if the upright long side wall 13 tries to rotate inward, the fixed wall 41 rotates around the notch 13a as a rotation axis. A protruding portion of the mounting surface 52a is located on the trajectory, and the protruding portion and the fixed wall portion 41 come into contact with each other. As a result, further inward rotation of the long side wall 13 is restricted. The long side wall 13 is positioned in the standing state, and maintains the standing state without the assistance of the operator. Therefore, in this embodiment, by providing a portion protruding from the fixed wall portion 41 on the mounting surface 52a of the mounting portion 52, the “suppressing portion” described in the claims is configured.

  After the long side wall 13 is erected, the short side wall 12 is rotated 90 degrees upward with the inner skin layer 23 portion remaining in the cut portion 12a of the short side wall 12 as a rotation axis. At this time, the engagement protrusion 34 of the engagement frame 30 attached to the adjacent short side wall 12 with respect to the engagement hole 42a of the engagement wall portion 42 of the side edge frame 40 attached to the long side wall 13. Is inserted from the inside. Then, the locking member 36 of the engagement frame 30 is slid from the housing position to the protruding position. As a result, the distal end portion of the lock member 36 protrudes from the slot 35, and the protruding portion is inserted into the engagement groove 42 b provided in the engagement wall portion 42 of the side edge frame 40. As a result, the short side wall 12 is in a locked state in which inward rotation is restricted, and the short side wall 12 and the long side wall 13 are connected to each other.

  In addition, when the container 10 in a box-like assembled state is folded, the above operations may be performed in the reverse order. At this time, when the long side wall 13 is folded from an upright state, for example, the long side wall 13 is rotated inward while pulling the upper part slightly upward from the cut portion 13a of the long side wall 13. Can be folded smoothly.

Next, effects in the present embodiment will be described.
(1) A rectangular box-shaped container 10 made of a hollow plate material includes a bottom wall 11 and a pair of short side walls 12 and a long side wall 13 erected along a short side edge and a long side edge of the bottom wall 11. The short side wall 12 and the long side wall 13 are sequentially overlapped on the bottom wall 11 so as to be folded inward. A side edge frame 40 is attached to a portion of the side wall of the long side wall 13 above the notch 13a, and a support member 50 that supports the side edge frame 40 is attached to the bottom wall 11. The support member 50 includes a placement portion 52 on which the lower end surface of the side edge frame 40 is placed. The mounting portion 52 is provided with a suppressing portion (mounting surface 52 a) that protrudes inward from the side edge frame 40 and suppresses the inward rotation of the long side wall 13.

  According to the above configuration, the inward rotation of the standing long side wall 13 is suppressed, and the long side wall 13 is positioned in the standing state. As a result, when assembling the container 10 into a box shape, the standing state of the long side wall 13 can be maintained without the assistance of the operator, and the work of rotating the short side wall 12 upward can be easily performed. Can do. Therefore, workability at the time of assembling into a box shape is improved.

  (2) The long side wall 13 is provided with a cut portion 13a formed so as to leave the inner skin layer 23 along the lower side of the long side wall 13. The long side wall 13 remains in the cut portion 13a. The inner skin layer 23 is bent so that it can be folded inward.

  When the folding configuration of the long side wall 13 based on the above-described cut portion 13a is adopted, a crease along the cut portion 13a is formed in the remaining skin layer 23. Due to the fold of the skin layer 23, a force in the direction of bending the skin layer 23, that is, the direction of folding the long side wall 13 always acts on the long side wall 13, and the standing state of the long side wall 13 becomes unstable. Tend to be. Therefore, when adopting the folding configuration of the long side wall 13 based on the cut portion 13a, it is particularly effective to employ the configuration described in (1) in combination.

(3) The restraining portion is provided by forming the placement surface 52 a of the placement portion 52 larger inward than the lower end surface of the fixed wall portion 41 of the side edge frame 40.
According to the above configuration, the suppressing portion can be provided only by changing the shape of the placement portion 52, specifically, the size of the placement surface 52a. Therefore, complication of the shape of the support member 50 due to the provision of the suppressing portion can be suppressed.

  (4) When the long side wall 13 is erected, the engagement provided in the fixed wall portion 41 of the side edge frame 40 with respect to the outer wall surface of the locking recess 53 in the locking recess 53 of the support member 50. It is comprised so that the corner | angular part of the stop protrusion 45 may contact | abut.

  According to the above configuration, the side edge frame 40 rotates while being lifted upward, so that the lower end surface of the fixed wall portion 41 can easily ride on the placement surface 52a. Therefore, the long side wall 13 can be easily rotated upward even when a restraining portion that protrudes inward is provided.

  In addition, this embodiment can also be changed and embodied as follows. Moreover, it is also possible to change the said embodiment like the structure of the combination of the following modification example mutually.

  The side edge frame 40 having the fixed wall portion 41 is attached to the side wall that is erected first at the time of assembly (the side that is folded later at the time of folding), and the support member 50 is provided below the side edge frame 40. The length of each side wall is not limited as long as it is configured to be attached.

  The configuration of the mounting surface 52a as the suppressing portion is not limited to a configuration in which the entire length of the long side wall 13 protrudes from the fixed wall portion 41, but only a part of the long side wall 13 in the length direction. The structure which protrudes may be sufficient.

  The restraining portion is formed so as to protrude inward with respect to the placement portion 52, and when the long side wall 13 in the standing state tries to rotate inward, the restraining portion of the side edge frame 40 is The specific configuration is not particularly limited as long as it is in contact with the fixed wall portion 41 and suppresses the inward rotation of the long side wall 13. For example, the suppressing portion may be a protruding portion such as a protrusion or a protrusion provided on the inner side surface of the mounting portion 52.

The locking protrusion 45 provided on the fixed wall portion 41 of the side edge frame 40 and the locking recess 53 provided on the support member 50 may be omitted.
The part to which the support member 50 is attached is not limited to the bottom wall 11, and the support member 50 may be attached to a part of the long side wall 13 below the notch 13 a, or It is good also as a structure which attaches the supporting member 50 to both a site | part and the bottom wall 11. FIG.

  The engagement configuration between the engagement frame 30 and the side edge frame 40 is not particularly limited as long as the adjacent side walls are connected to each other when assembled in a box shape. In addition, an engagement member having a configuration for engaging with the engagement frame 30 is omitted from the side edge frame 40, such as the engagement hole 42a and the engagement groove 42b. You may attach to the side edge of the long side wall 13. FIG.

  If the hollow plate material is a hollow plate material having a core layer 21 that forms a hollow structure therein and skin layers 22 and 23 disposed on both sides of the core layer 21, the specific configuration thereof is particularly limited. is not. For example, it may be a hollow plate material in which the core layer 21 and the skin layers 22 and 23 are integrally formed, such as a hollow plate material made of an extruded product having a harmonica cross section. In this case, the flat plate portions positioned on the upper and lower surfaces of the hollow plate material are the skin layers 22 and 23, and the column portion (wall portion) positioned between the flat plate portions is the core layer 21.

The technical idea that can be grasped from the embodiment and the modified examples will be described.
(A) The folding container is formed so that the restraining portion protrudes so as to overlap the rotation trajectory of the side edge frame.

(B) The folding container in which the restraining portion is provided by forming the placement surface of the placement portion larger inward than the lower end surface of the side edge frame.
(C) The folding container, wherein the suppressing portion is a protrusion or a protrusion provided on the inner surface of the mounting portion.

  (D) The folding container in which the side edge frame is integrally formed with an engagement structure for connecting the first side wall and the second side wall.

  DESCRIPTION OF SYMBOLS 10 ... Container, 11 ... Bottom wall, 12 ... Short side wall, 13 ... Long side wall, 12a, 13a ... Notch part, 21 ... Core layer, 22, 23 ... Skin layer, 30 ... Engagement frame, 40 ... Side edge frame , 41 ... fixed wall part, 50 ... support member, 52 ... mounting part, 52a ... mounting surface.

Claims (1)

It consists of a hollow plate material made of synthetic resin that has a core layer that forms a hollow structure inside and a skin layer that is arranged on both sides of the core layer, and is erected on the square plate-like bottom wall and the periphery of the bottom wall A rectangular box-like container having a pair of opposing first and second side walls, wherein the first side wall is overlaid on the bottom wall and the second side wall is overlaid on the first side wall. In the folding container that can be folded inward by
The second side wall is formed with a cut portion that leaves the inner skin layer along the lower side of the second side wall, and the second side wall has the inner skin layer at the cut portion. It can be folded inward by bending,
The side edge frame is attached to the upper part from the notch in the side edge of the second side wall, and the support member that supports the side edge frame is provided on the bottom wall and the side edge of the second side wall. Attached to at least one of the lower sites from the notch
The support member includes a placement portion on which a lower end surface of the side edge frame is placed,
The folding container according to claim 1, wherein the placement portion is provided with a suppressing portion that protrudes inward from the side frame and suppresses the inward rotation of the second side wall.