JP2006306483A - Folding-type synthetic resin-made box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a synthetic resin-made box, in which operation efficiency is improved and the loss of an inside material is prevented, by making the insertion and removal of the inside material unnecessary. <P>SOLUTION: A vertical center folding-up line part 8 is formed at the center part in the horizontal direction of the side face 3 of the synthetic-resin made box 1 to make folding along the folding-up line part 8 possible. A side-fold up line 9 is formed in the vertical directions, close to both end parts in the horizontal direction on the left face 31L and the right face constituting the side face 3 and the dimensions between the side-fold up line 9 and both end parts of the left face 31L and the right face 31R are set coping with the thickness of the inside plate 10 inserted in the box 1. Furthermore, the side-fold up line 9 is formed so as to have a V-shape cross section with the apex angle of 90-degree angle and also a reinforcing frame 13 with substantially identical height to a front face 32F and a back face 32B of the side face 3 is fixed detachably. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a foldable synthetic resin box, and more particularly to a foldable synthetic resin box which is folded when not in use so as not to be bulky.

  Conventionally, this type of synthetic resin box has a rectangular bottom plate, a rectangular cylindrical side surface disposed upright on the corner peripheral edge of the bottom plate, and a lid that is detachably attached to the upper opening of the side surface portion. It is known that a folding line portion is formed in the vertical direction at the center portion in the horizontal direction of the pair of wall plates facing each other on the rectangular tubular side surface portion.

  The box is configured so that when not in use, the box can be deformed into a flat plate as a whole by folding the pair of wall plates inward along the fold line portion at the center of the pair of wall plates. (For example, Patent Document 1).

  When the box is actually used, for example, after the contents are placed on the bottom plate, the beam is assembled on the column while the column is fitted into the concave portion of the bottom plate and brought upright. After that, the side surface is shaped into a hollow cylinder and covered from above the column and the beam, and finally the lid is attached to the upper opening of the side surface.

Further, when the box is not used, the pair of wall plates are folded inward at the fold line portion so that the box is folded into a flat plate shape and stored or transported. In this folded state, since it is deformed into a flat plate shape that is not bulky, the installation space for the box is reduced.
JP-A-9-77061

  In the conventional synthetic resin box, when the contents are stored, an inner material having a heat insulating performance or a buffer performance may be inserted inside the box. For example, if the contents are fresh food such as fresh fish, a heat insulating material for keeping the fresh food at a low temperature or a buffer material for protecting the fresh food from impact is used as the inner material.

  However, when the inner material is assembled into a usable three-dimensional shape and the contents are stored, the inner material must be loaded inside the box each time. On the other hand, when the box is not used, when the box is folded into a flat plate shape, it is necessary to take out the inner material, separate it from the box, and transport or store both separately.

  For this reason, when the synthetic resin box is not used or used, it is necessary to carry out the operation of removing the inner material every time. For this reason, many man-hours are required when folding or assembling the box and setting the inner material. In particular, the work of putting in and out the inner material is very troublesome and the work efficiency is lowered.

  In addition, since the synthetic resin box and the inner material are each a single item, the inner material may be lost when the box is assembled or when the box is folded and stored.

  Therefore, there is a technical problem to be solved in order to improve work efficiency by eliminating the need to put in and out the inner material from the foldable synthetic resin box and to prevent the loss of the inner material. The present invention aims to solve this problem.

  The present invention has been proposed to achieve the above object, and the invention according to claim 1 includes a rectangular bottom plate, a rectangular cylindrical side portion disposed upright on the peripheral edge of the bottom plate, A center fold line portion extending in the vertical direction is formed at the horizontal central portion of each of the pair of left and right wall plates constituting the rectangular cylindrical side surface portion. In the foldable synthetic resin box, a side fold line portion for folding the wall plate inside the box is formed in the vertical direction near the horizontal end of the pair of left and right wall plates, The distance from the fold line portion to the horizontal end of the wall plate corresponds to the thickness of the inner material composed of a heat insulating material, a cushioning material, etc. inserted inside the rectangular cylindrical side surface portion, and the inner material So that the wallboard can be folded along the side fold line To provide a form was folding plastic box.

  According to this configuration, a side fold line portion for folding the wall plate inward is formed near the horizontal end portion of the wall plate, and the side fold line portion to the horizontal end portion of the wall plate is formed. Since the distance corresponds to the thickness of the inner member, the wall plate can be folded and assembled while the inner member is still inserted in the box.

  That is, when folded (not used), the box can be folded into a flat plate while being inserted inside the box, while at the time of assembly (use), the inner material is charged inside the box. The box can be assembled into a cylindrical solid shape.

  According to a second aspect of the present invention, the side fold line portion is formed in a V-shaped cross section, and the wall plate is configured to be bent 90 degrees toward the inner material side. Provide a plastic box.

  According to this configuration, since the side fold line portion is formed in a V-shaped cross section, the wall plate is bent 90 degrees toward the inner material side along the side fold line portion so that a wall is formed on the surface of the inner material. Fold the plate tightly so that there is no gap.

  According to a third aspect of the present invention, a reinforcing frame having a height substantially equal to the height of the side surface portion is detachably attached to the rectangular cylindrical side surface portion corresponding to the inner material. The foldable synthetic resin box according to claim 1 or 2, further comprising a sandwiching surface portion for sandwiching the side surface portion from both sides.

  According to this configuration, the reinforcing frame having substantially the same height as the side surface portion is attached while sandwiching the side surface portion, and thus the rigidity strength of the side surface portion in the height direction is increased by the reinforcing frame.

  The invention described in claim 1 does not require the inside material to be taken in and out of the box when the box is not used and used, and can greatly reduce the man-hours required for transporting or storing the box, thereby improving work efficiency. Can do.

  In addition, when the box is assembled and used, or when the box is folded and stored, there is no need to separate the inner material from the box, so there is a specific effect that the loss of the inner material can be surely prevented. .

  In the invention according to claim 2, when the box is not used, the wall plate can be folded 90 degrees toward the inner material side so that there is no gap. Therefore, in addition to the effect of claim 1, the box can be folded compactly It can be made not bulky.

  In the invention described in claim 3, since the rigidity strength in the height direction of the side surface portion is increased by the reinforcing frame, in addition to the effect of claim 1 or 2, for example, without increasing the thickness of the side surface portion, Even when heavy contents are put in a plurality of boxes, the boxes can be stacked in a plurality of stages while protecting the inner material.

  In particular, in the case of a full open type in which a part of the side surface portion is vertically divided, the strength can be improved in a state where the divided portion is sandwiched and joined by a reinforcing frame. Boxes can be stacked in multiple stages.

  In the present invention, a side fold line portion for folding the wall plate inside the box is formed in the vertical direction in the vicinity of the horizontal end portion of the pair of left and right wall plates, and the horizontal end of the wall plate from the side fold line portion. The distance to the part corresponds to the thickness of the inner material inserted inside the side surface part, and the wall plate can be folded along the side fold line part while the inner material is inserted, and the side fold line part Is formed in a V-shaped cross section with an apex angle of 90 degrees, and the inner material is formed of a heat insulating material, and the side surface portion corresponding to the inner material has substantially the same height as the side surface portion. The reinforcing frame is detachably attached, and the reinforcing frame has a sandwiching surface portion that sandwiches both sides of the side surface portion, so that it is not necessary to take out the inner material from the box every time the contents are put in and out of the box, The purpose of facilitating the transportation or storage of boxes is achieved. .

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing a foldable synthetic resin box 1 according to the present embodiment. The box 1 includes a rectangular bottom plate 2, a rectangular cylindrical side surface portion 3 that is arranged upright at the peripheral edges of four sides of the bottom plate 2, and a rectangular top cover that covers an upper opening of the side surface portion 3. It consists of four.

  As shown in FIG. 2, the side portion of the box 1 can be molded using a hollow structure plate having a hollow portion 5, and the hollow structure plate is formed by extruding a thermoplastic resin such as a polypropylene resin or a polyethylene resin. Can be manufactured. The box 1 is not limited to a hollow synthetic resin sheet or synthetic resin corrugated cardboard, but may be formed of a solid synthetic resin sheet.

  The side surface portion 3 is formed by joining both end portions of a pair of left and right vertical side wall plates 31 and both end portions of a pair of front and rear side wall plates 32 perpendicular thereto. In this case, the vertical side wall plate 31 and the horizontal side wall plate 32 are joined together by heat welding.

  Specifically, as shown in FIG. 1, the vertical side wall plate 31 includes a left surface portion 31 </ b> L and a right surface portion 31 </ b> R that face each other in the lateral direction W as constituent elements. Further, the lateral side wall plate 32 includes a front surface portion 32F and a rear surface portion 32B that face each other in the vertical direction T as constituent elements. The front end portions of the left surface portion 31L and the right surface portion 31R are joined to the left end portion and the right end portion of the front surface portion 32F, respectively, and the rear end portions of the left surface portion 31L and the right surface portion 31R are respectively the left end portion of the rear surface portion 32B, It is joined to the right end.

  The lower end portions of the left surface portion 31L and the right surface portion 31R of the vertical side wall plate 31 are arranged upright on the upper surfaces of the left vertical edge portion 21L and the right vertical edge portion 21R of the bottom plate 2. Further, the front surface portion 32F and the rear surface portion 32B of the lateral side wall plate 32 are arranged upright on the upper surfaces of the front lateral edge portion 22F and the rear lateral edge portion 22B of the bottom plate 2.

  In the horizontal direction perpendicular to the thickness direction in the assembled state of the vertical side wall plate 31, that is, in the horizontal direction (vertical direction T in FIG. 1) in the front view S of the left surface portion 31L and the right surface portion 31R, in the vertical direction V An extending center fold line portion 8 is formed. Further, the vertical side wall plate 31 is configured to be bendable toward the inner surface side of the vertical side wall plate 31 along the center fold line portion 8. Furthermore, the cross-sectional shape of the center fold line portion 8 is formed in a V shape.

  In use, the box 1 is assembled into a rectangular tube-shaped state in which the side surface portion 3 is developed by separating the front surface portion 32F and the rear surface portion 32B of the lateral side wall plate 32 from each other in the vertical direction T. As shown in FIGS. 2 and 3, at least two inner materials 10 having a little thickness are inserted and arranged inside. The inner member 10 is formed in a square having a size corresponding to the front surface portion 32F and the rear surface portion 32B of the lateral side wall plate 32. The inner member 10 functions as a heat insulating member or a buffer member in the box 1.

  More specifically, the two inner members 10 are loaded and set so that the outer surfaces thereof are in close contact with the front surface portion 32F and the rear surface portion 32B of the lateral wall plate 32. In addition, the number of the inner members 10 is further used, and when these two inner members 10 are assembled and used, the inner wall 10 is in close contact with the left side 31L and the right side 31R of the vertical side wall plate 31. In this case, the inner member 10 is inserted and arranged on the four inner surfaces of the side surface 3.

  In the illustrated example, a plurality of concave grooves 11 extending vertically are provided at predetermined intervals on the inner surface of each inner member 10, and the inner member of the inner groove 10 and the rear surface portion 32B of the inner member 10 on the front surface portion 32F side. The ten concave grooves 11 are arranged opposite to each other, and a partition plate 12 is detachably mounted between the opposing concave grooves 11. The partition plate 12 defines the internal space of the box 1 into a plurality of storage chambers.

  Side fold line portions 9 for folding the left surface portion 31L and the right surface portion 31R to the inside of the box 1 are formed in the vicinity of both ends in the longitudinal direction T of the left surface portion 31L and the right surface portion 31R of the vertical side wall plate 31. The line portion 9 extends in the vertical direction V in parallel with the center fold line portion 8.

  The side fold line portion 9 is provided at a position corresponding to the inner surface of the inner member 10, and both ends of the left fold line portion 9 in the left surface portion 31L and the right surface portion 31R, that is, the thickness portion of the inner member 10 The opposing part is a non-bent part 14.

  Accordingly, the left surface portion 31L and the right surface portion 31R of the vertical side wall plate 31 move so as to be foldable toward the inner surface side of the vertical side wall plate 31 along the side fold line portion 9, but the unfolded portion 14 does not move. Further, the cross-sectional shape of the side fold line portion 9 is formed in a V shape having, for example, an apex angle θ of 90 degrees, whereby the left surface portion 31L and the right surface portion 31R of the vertical side wall plate 31 are It can be bent 90 degrees inward.

  Furthermore, the distance dimension from the side fold line portion 9 to the front surface portion 32F or the rear surface portion 32B of the side wall plate 32 is set to a length substantially the same as the thickness of the inner member 10 as illustrated in FIG. ing. Thus, in a state where the inner member 10 is inserted and set inside the box 1, the inner member 10 remains in contact with the front surface portion 32 </ b> F or the rear surface portion 32 </ b> B of the side wall plate 32 and the left side of the vertical side wall plate 31. The surface portion 31L and the right surface portion 31R can be bent 90 degrees inward along the side fold line portion 9.

  As described above, according to the present invention, the end portion of the vertical side wall plate 31 which is the folding surface portion of the synthetic resin box 1 is provided with the non-bent portion (the inner core portion for the inner material charging set) 14 corresponding to the thickness of the inner material 10. The inner member 10 as a heat insulating member or a buffer member can be set in the non-bent portion 14.

  The folding line portions 8 and 9 can be formed by vertically forming a bending long groove having a V-shaped cross section in the vertical side wall plate 31. In this case, the long side groove is usually recessed by pressing the heat bar against the vertical side wall plate 31, but in addition to this, the method of forming the folding line portions 8 and 9 using a V-shaped pressing blade, or A method of forming the fold line portions 8 and 9 by cutting a cut groove with a cutting blade can be adopted as appropriate, and the fold line portions 8 and 9 can also be formed by a hinge.

  The synthetic resin box 1 having the above-described configuration can be obtained by separating the front surface portion 32F and the rear surface portion 32B of the side wall plate 32 from each other while keeping the inner material 10 inside the box 1 during use. 3 is developed and assembled into a usable box shape.

  In actual use, after the contents P are placed on the bottom plate 2, the side surface 3 is erected on the bottom plate 2, and finally the upper lid 4 is applied. In this case, it is possible to increase the strength by incorporating a post or a rib (not shown) at an appropriate location inside the box 1 if necessary. In this case, reinforcing ribs can be integrally formed at appropriate positions of the bottom plate 2, the side surface portion 3, and the upper lid 4.

  Moreover, as shown in FIG.2 and FIG.3, the metal reinforcement frame 13 of the substantially same height as the side surface part 3 is attached to the side surface part 3 corresponding to the inner material 10 so that attachment or detachment is possible. Can do. The shape of the reinforcing frame 13 has two sandwiching surface portions that sandwich the side surface portion 3 from both sides, and the upper end portion of the reinforcing frame 13 is an H shape in plan view that connects the upper end portions of the two sandwiching surface portions. Is formed. In this case, the reinforcing frame 13 is attached to a total of four locations in the vicinity of the corners on both sides of the front surface portion 32F and the rear surface portion 32B of the side wall plate 32.

  According to the present embodiment, the side fold line portion 9 is provided at a position corresponding to the inner surface of the inner member 10, and the vertical side wall plate 31 can be bent inward along the side fold line portion 9. In this case, even when the side surface portion 3 is folded, the inner member 10 is fixedly held by the unfolded portions 14 that are L-shaped portions on both ends of the front surface portion 32F and the rear surface portion 32B.

  Therefore, it is not necessary to take out the inner material 10 from the side surface portion 3 each time the box 1 is folded. That is, unlike the prior art, when the box 1 is used or not used, each time the contents P are taken in and out, the trouble of taking in and out the inner material 10 from the box 1 can be saved. Thus, when the box 1 is transported or stored, the man-hours for putting in and out the inner material 10 can be reduced, the transport or storage work can be easily and quickly performed, and the productivity can be improved.

  Further, even when the box 1 is assembled or when the box 1 is folded and stored, the inner member 10 is loaded and set stably in the box 1. Therefore, since the inner material 10 is not separated from the box 1, there is no possibility of losing the inner material 10 as in the prior art.

  In this embodiment, since the reinforcing frames 13 are attached to a total of four locations in the vicinity of both end portions of the front surface portion 32F and the rear surface portion 32B of the lateral side wall plate 32, the thickness of the side surface portion 3 of the box 1 does not have to be increased. The strength of the side surface portion 3 in the height direction increases. Therefore, for example, in a state where the contents P are accommodated in a plurality of boxes 1, the boxes 1 can be sequentially stacked in multiple stages, and the storage space for the boxes 1 can be reduced.

  Here, the inner material 10 is formed of a buffer protective material having a required heat insulation performance, for example, polystyrene foam. For this reason, since the internal temperature of the box 1 is interrupted from the external temperature by the inner material 10, it is always kept at a substantially constant value. For example, if special ice is put in the box 1, the box 1 functions as a freezing container. In particular, if the box 1 is a hollow structure, the box 1 and the inner material 10 are synergistically insulated. By exhibiting the effect, frozen foods such as fish and vegetables can be transported or stored at a low temperature for a long time, and usability is remarkably improved.

  Further, since the side fold line portion 9 is formed, for example, in a V-shaped cross section having an apex angle of 90 degrees, the left surface portion 31L and the right surface portion 31R of the vertical side wall plate 31 are formed along the side fold line portion 9. It can be bent 90 degrees to the material 10 side and folded. Therefore, when the box 1 is folded, as shown in FIG. 4, the left surface portion 31L and the right surface portion 31R are in close contact with the surface of the inner member 10 and folded in a state without a gap. Can be stored.

  Although the said Example demonstrated what was applied to the non-open type synthetic resin box 1, this invention is applicable also to a synthetic resin box of a half open type or a full open type. In the half-open type synthetic resin box 1, as illustrated in FIG. 5, a rectangular small plate surface portion 15 is opened and closed on one or both upper portions of the front surface portion 32 </ b> F and the rear surface portion 32 </ b> B of the side wall plate 32. It is provided as possible.

  Further, in the full-open type synthetic resin box 1, as illustrated in FIG. 6, one or both of the front surface portion 32F and the rear surface portion 32B of the side wall plate 32 is inserted and removed through appropriate attachment means. It has a rectangular flat plate surface portion 17 which can be attached.

  In this case, the flat plate surface portion 17 is attached between the side edge portions 19 and 19 provided on both sides in the width direction W. The side edge portions 19 and 19 and the flat plate surface portion 17 are connected to the reinforcing frame ( By holding and fixing with reference to the reference numeral 13 in FIG.

  That is, when the front surface portion 32F or the rear surface portion 32B is a divided type in the vertical direction V, the overall strength of the box 1 can be increased by sandwiching and connecting the divided portions with the reinforcing frame 13. Therefore, even if it is the box 1 of a side surface division type | mold structure, the box 1 in the state in which the content was accommodated at the time of use can be piled up in multiple stages one by one.

  As described above, according to the present invention, the non-bending portion (inner material setting wing roller portion) 14 corresponding to the thickness of the inner member 10 is provided at the end portion of the vertical side wall plate 31 that is the folding surface portion of the box 1, and is not bent. The inner member 10 which is a heat insulating member or a buffer member can be set in the portion 14. Thus, the width dimension in the longitudinal direction T of the non-folded portion 14 can change the position of the side fold line portion 9 formed by a heat bar or a hinge in accordance with the thickness width of the inner member 10, The width dimension of the bent portion 14 can be appropriately set to an arbitrary dimension, and can be easily adapted according to various uses and contents P of the box 1.

  In short, according to the present invention, the side part 3 can be folded with one touch while the inner member 10 is stored inside the side part 3, and the setting of the inner member 10 becomes unnecessary compared to the conventional case. There is no risk of losing.

  Moreover, the pressure-resistant intensity | strength of the synthetic resin box 1 which is a container body can also be increased by shape | molding each corner part of the side part 3 by heat welding.

  It should be noted that the present invention can be variously modified without departing from the spirit of the present invention, and the present invention naturally extends to the modified ones.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view of the whole synthetic resin box which shows one embodiment of this invention. The principal part top view which shows the side fold line part of the synthetic resin boxes which concern on one embodiment. The perspective view which shows a state when an inner material is put into the inner side of the synthetic resin box of FIG. The perspective view which shows a state when the synthetic resin box of FIG. 3 is folded. The perspective view which shows the half open type synthetic resin box which can apply this invention. The perspective view which shows the full-open type synthetic resin box which can apply this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Synthetic resin box 2 Bottom plate 2A Vertical edge part 2B Horizontal edge part 3 Side part 31 Vertical side wall board 31L Left side part 31R Right side part 32 Horizontal side wall board 32F Front part 32B Rear surface part 4 Upper cover 5 Hollow part 8 Center folding line part 9 Side fold line part 10 Inner material 11 Groove 12 Partition plate 13 Reinforcement frame 14 Non-bending part 17 Flat surface part 19 Side edge part W Horizontal direction T Vertical direction V Vertical direction (Up-down direction)
P Contents

Claims (3)

  A rectangular bottom plate, a rectangular cylindrical side surface disposed upright on the peripheral edge of the bottom plate, and an upper lid covered by an upper opening of the side surface portion, the rectangular cylindrical side surface portion is configured. In the foldable synthetic resin box formed by forming a center fold line portion extending in the vertical direction at the horizontal center of each of the pair of left and right wall plates, in the vicinity of the horizontal ends of the pair of left and right wall plates, A side fold line portion for folding the wall plate inside the box is formed in the vertical direction, and the distance from the side fold line portion to the horizontal end of the wall plate is the inside of the rectangular cylindrical side surface portion. It corresponds to the thickness of the inner material composed of a heat insulating material, a cushioning material, etc., and the wall plate is configured to be folded along the side fold line portion while the inner material is charged. Foldable synthetic resin box.   2. The foldable synthetic resin box according to claim 1, wherein the side fold line portion is formed in a V-shaped cross section and is configured such that the wall plate is bent 90 degrees toward the inner material side. . A reinforcing frame having a height substantially equal to the height of the side surface portion is detachably attached to the rectangular cylindrical side surface portion corresponding to the inner material, and the reinforcing frame sandwiches the side surface portion from both sides. The foldable synthetic resin box according to claim 1 or 2, further comprising a surface portion.

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