JP2011116438A - Folding box - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a folding box which is easy to assemble while capable of eliminating gaps at respective corners of a box-like body. <P>SOLUTION: Disclosed is a folding box 10 in which a square-shaped bottom plate 25 is provided with end plates 30, 35 and side plates 40, 45 rising therefrom so as for a box-like body 20 to be assembled, the end plates and side plates being continuously connected via folds 21, 22, 23, 24, while at the respective corners 11, 12, 13, 14, the respective neighboring end plates and side plates are integrally connected at the time when the respective end plates and side plates have been erected, and in addition, thin plates 50 are formed that are overlapped on the end plates, whereas at the side plates, grooves 60 shaped by notching from end sides 41, 46 near the positions where the respective thin plates are folded are held, with both the ends of the end sides 31, 36 of the respective end plates having engagement sections 70 formed thereon which are foldable into the inside surface side of the end plate via folds 32, 37 and which, upon folding, sandwich side plates together with the thin plates folded to be overlapped on the side plates and whose tip ends are engaged with the grooves. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a folded box that is assembled with an end plate portion and a side plate portion that are connected to a rectangular bottom plate portion.

  As a box-shaped container for storing various articles, for example, it has an end plate part and a side plate part integrally connected to each side part of a rectangular bottom plate part via a bent part such as a V-groove. There is known a folded box in which each end plate portion and each side plate portion are erected through a bent portion and a box-shaped main body is assembled (see, for example, Patent Document 1).

  In this folding box, when storing the article when it is not stored, each plate portion can be expanded into a single plate-like body to save space, and from the expanded state It is possible to easily assemble each plate part upright. Moreover, by using each plate portion as a material such as a synthetic resin foam, a folded box that is lightweight and has protection and heat retention can be easily formed.

  Such folding boxes are generally used for transporting raw items such as fish that need to be stored at a low temperature and items such as frozen foods. At that time, a cooling agent such as ice is appropriately stored together with the article. However, in the above conventional folding box, since each end plate part and each side plate part are erected and assembled, it is difficult to completely contact each corner of the box-shaped main body. Gaps occur. Further, when the article is stored for a long period of time, it is inevitable that water is generated due to condensation or ice melting in the folded box, so that there is a risk of liquid leakage from the gaps at the corners. Moreover, there existed a problem that the heat retention effect of a folding box fell, for example, external air penetrate | invaded inside by the said clearance gap.

Japanese Utility Model Publication No. 6-47126

  The present invention has been made in view of the above points, and provides a folded box that is easy to assemble and that can eliminate gaps at the corners of the box-shaped main body.

  That is, the invention according to claim 1 is a quadrangular bottom plate portion composed of parallel vertical side portions (a, b) and horizontal side portions (c, d), and a bent portion at each vertical side portion of the bottom plate portion. End plate portions that are continuously provided via the side plates, and side plate portions that are continuously provided on the respective lateral sides of the bottom plate portion via bent portions, and each of the end plate portions and the side plate portions are respectively connected to each other. A folding box that is erected through a bent portion to assemble a box-shaped main body, and each end plate portion and each of the corner portions connecting the end plate portions and the side plate portions. When the side plate portion is erected, a thin plate portion that integrally connects the end plate portion and the side plate portion adjacent to each other and is folded on the side plate portion is formed, and the side plate portion is folded on each of the thin plate portions. It has a groove formed by cutting out from the end side in the vicinity of the position, and can be bent to the inner side of the end plate part via a bent part at both ends of the end side part of each end plate part. Ri at the time of bending according to Oribako, characterized in that the engagement portion clipping vital tip the side plate portion with the thin portion that is folded over the side plate portion is engaged with the groove is formed.

  According to a second aspect of the present invention, the engaging portion is connected to the flat plate-like main body, the sandwiching pieces erected on both sides of the main body, and the sandwiching pieces on the both sides on the distal end side of the main body. The engaging recess is formed by an upright engaging piece, and at the time of bending, the engaging piece is inserted into and engaged with the groove, and the side plate and the end of the folded thin plate portion 2. The folding box according to claim 1, wherein a side portion side is housed in the housing recess and is sandwiched by the sandwiching pieces.

  According to a third aspect of the present invention, a claw that is integrally formed with a lateral groove formed toward the center side of the side plate at the lower part of the groove, and is engaged with the lateral groove at the end of the engaging portion. It concerns on the folding box of Claim 1 or 2 in which the part is formed.

  Invention of Claim 4 concerns the folding box of any one of Claim 1 thru | or 3 in which the thin part which accommodates the said thin plate part in the said side plate part is formed.

  The invention according to claim 5 relates to the folded box according to any one of claims 1 to 4, wherein the thin plate portion is folded on the outer surface of the side plate portion.

  In the invention of claim 6, an end frame part that can be bent to the inner surface side of the end plate part via the bent part is formed integrally with the engaging part on the end side part of each end plate part. 6. The folding box according to claim 1, wherein a side frame portion protruding toward an inner surface side of the side plate portion is formed at the end side portion between the groove portions of the side plate portions.

  The invention according to claim 7 relates to the folded box according to any one of claims 1 to 6, wherein the bottom plate portion, the end plate portion, and the side plate portion have a thickness of 1.5 to 6 mm.

  The invention according to claim 8 relates to the folded box according to any one of claims 1 to 7, wherein the thin plate portion has a thickness of 0.1 to 1.5 mm.

  The invention according to claim 9 relates to the folded box according to any one of claims 1 to 8, wherein each of the plate portions is made of a synthetic resin foam.

  A tenth aspect of the present invention relates to the folded box according to the ninth aspect, wherein a laminate sheet is adhered to one side or both sides of each plate portion made of the synthetic resin foam.

  The folding box according to the first aspect of the present invention includes a quadrangular bottom plate portion formed of parallel vertical side portions (a, b) and horizontal side portions (c, d), and a bent portion at each vertical side portion of the bottom plate portion. Each of the end plate portions and the side plate portions are connected to each side portion of the bottom plate portion via a bent portion. Is a folding box that is erected through the bent portion of the box body to assemble each end plate portion and each side plate portion, and each end plate portion and the above-mentioned end plate portion. When each side plate portion is erected, a thin plate portion that connects the end plate portion and the side plate portion that are adjacent to each other and is folded on the side plate portion is formed. It has a groove formed by cutting out from the end side part in the vicinity of the overlapping position, and can be bent to the inner side of the end plate part through a bent part at both ends of the end side part of each end plate part. A box-shaped main body with an extremely simple configuration is formed because the thin plate portion folded on the side plate portion at the time of bending is formed with an engaging portion that sandwiches the side plate portion and engages the tip with the groove portion. It is possible to close the gaps at the respective corners, and it is easy to assemble the box-shaped main body.

  According to a second aspect of the present invention, in the first aspect, the engaging portion includes a flat plate-like main body, sandwiching pieces erected on both sides of the main body, and a sandwiched portion of the both sides on the distal end side of the main body. A receiving recess is formed by an engaging piece that is erected and connected to the wearing piece, and at the time of bending, the engaging piece is inserted into the groove and engaged, and the side plate and the folded piece are folded. Since the edge part side of the thin plate part is accommodated in the accommodation recess and is sandwiched by the sandwiching pieces, the side plate part and the edge part of the folded thin plate part 50 are prevented from being exposed, and the appearance is deteriorated. And the folded state of the thin plate portion can be easily and reliably maintained.

  A third aspect of the present invention is the method according to the first or second aspect, wherein a lateral groove portion formed toward the center side of the side plate portion is integrally formed at a lower portion of the groove portion, and the lateral groove is formed at a tip of the engaging portion at the time of the bending. Since the nail | claw part engaged with a part is formed, an engaging part can be reliably fixed with respect to a side wall part, and it can prevent that engagement is released suddenly.

  According to a fourth aspect of the present invention, in the first to third aspects, since the thin portion that accommodates the thin plate portion is formed in the side plate portion, the thin plate portion is prevented from excessively protruding from the inner surface or the outer surface of the side plate portion. can do.

  According to a fifth aspect of the present invention, in the first to fourth aspects, since the thin plate portion is folded on the outer surface of the side plate portion, it is possible to assemble the box-shaped main body with the article to be stored placed on the bottom plate portion in advance. Yes, work efficiency is improved.

  According to a sixth aspect of the present invention, in the first to fifth aspects, an end frame portion that can be bent toward the inner surface side of the end plate portion via the bent portion is engaged with the end side portion of each end plate portion. Since the side frame portion that protrudes toward the inner surface side of the side plate portion is formed at the end side portion between the groove portions of the side plate portions, the strength of the assembled box-shaped main body is increased. It can be easily increased.

  The invention of claim 7 is the invention according to claims 1 to 6, wherein the bottom plate portion, the end plate portion, and the side plate portion have a thickness of 1.5 to 6 mm, so that sufficient strength and a heat retaining effect can be obtained. It is excellent in convenience such as being easy to store and assemble without being bulky more than necessary.

  An eighth aspect of the present invention is that, in the first to seventh aspects, since the thickness of the thin plate portion is 0.1 to 1.5 mm, it is easy to be folded and sufficient strength can be secured.

  A ninth aspect of the present invention can provide a folded box that is lightweight and excellent in protective properties and heat retaining properties, because the plate portions are made of a synthetic resin foam in the first to eighth aspects.

  The invention of claim 10 is that, in claim 9, since the laminate sheet is adhered to one or both sides of each plate portion made of the synthetic resin foam, the outer surface of the folded box can be easily decorated. In addition, each bent portion can be reinforced.

It is a perspective view of the folding box which concerns on the 1st Example of this invention. It is an expanded view of the folding box of FIG. It is AA sectional drawing of FIG. It is principal part sectional drawing which represented the folding example of the thin-plate part typically. It is a perspective view of an engaging part. It is a perspective view of the thin plate part folding position vicinity of the side plate part at the time of an assembly of a box-shaped main body. It is principal part sectional drawing which represented the bending process of the engaging part typically. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG.

  As shown in FIGS. 1 and 2, the folding box 10 of the present invention includes a rectangular bottom plate portion 25 composed of parallel vertical side portions a and b and horizontal side portions c and d, and each vertical side of the bottom plate portion 25. The end plate portions 30 and 35 connected to the portions a and b through the bent portions 21 and 22 and the lateral side portions c and d of the bottom plate portion 25 are connected to each other through the bent portions 23 and 24. Each of the end plate portions 30 and 35 and each of the side plate portions 40 and 45 is erected via the respective bent portions 21, 22, 23 and 24. 20 is assembled. In this folding box 10, each folding part 21, 22, 23, 24 can be formed in an appropriate shape such as a V-shaped groove or a concave groove, and is a V-shaped groove in the embodiment.

  In the folded box 10, the thicknesses of the bottom plate portion 25, the end plate portions 30 and 35, and the side plate portions 40 and 45 are appropriately set according to the type, size, application, and the like of the articles to be stored. In particular, from the viewpoint of convenience, strength, heat retention, etc., the thickness of each of the plate portions 25, 30, 35, 40, 45 is 1.5 to 6 mm. If the thickness is less than 1.5 mm, sufficient strength and heat retention effect cannot be obtained, and if the thickness is more than 6 mm, it is bulky more than necessary, resulting in inconvenience of storage and difficulty in assembly. There is a fear. The thickness of each plate part 25, 30, 35, 40, 45 of an Example is 3 mm.

  In this folding box 10, thin plate portions 50, 50, 50, 50 are formed at the respective corner portions 11, 12, 13, 14 connecting the end plate portions 30, 35 and the side plate portions 40, 45, and the respective side plate portions. 40 and 45 are formed with groove portions 60 (60A, 60B, 60C and 60D), and engaging portions 70 (70A, 70B, 70C and 70D) are formed at both ends 31 and 36 of the end plate portions 30 and 35. Has been.

  As shown in FIG. 2, the thin plate portion 50 is formed at each corner portion 11, 12, 13, 14 connecting the end plate portions 30, 35 and the side plate portions 40, 45. As shown in FIGS. 1, 4, and 6, when the end plate portions 30 and 35 and the side plate portions 40 and 45 are erected, the adjacent end plate portions 30 and 35 and the side plate portions 40 and 45 are integrated. And is configured to be folded on the side plate portions 40 and 45.

  In the thin plate portion 50, when the end plate portions 30, 35 and the side plate portions 40, 45 are erected, the adjacent end plate portions 30, 35 and the side plate portions 40, 45 are integrally connected. Therefore, the gap between the adjacent end plate portions 30 and 35 and the side plate portions 40 and 45 is blocked, and water leaks from the spaces between the corner portions 11, 12, 13 and 14 when assembled as the box-shaped main body 20. Etc. can be effectively prevented. In addition, as long as the thin plate portion 50 can prevent the water leakage and the like, the positions, shapes, and the like formed at the corner portions 11, 12, 13, and 14 are not particularly limited. In particular, if the outer surface of the thin plate portion 50 is formed flush with the outer surfaces 30B, 35B, 40B, and 45B of the end plate portions 30 and 35 and the side plate portions 40 and 45, the thin plate portion 50 can be easily formed, and the box-shaped body For example, it is convenient to stack 20 when the 20 is stacked and stored.

  Furthermore, as shown in the development view of FIG. 2, the thin plate portion 50 is preferably formed with an easily folding portion 51 in an oblique direction from the corners 11, 12, 13, 14 side of the bottom plate portion 25. As shown in FIG. 3, the easy-folding portion 51 is formed with appropriate cuts, grooves, or the like on the surface in the folding direction, so that the thin plate portion 50 can be easily folded at a specific position, improving workability and folding. A time shift or the like can be prevented.

  In the thin plate portion 50 of the embodiment, as shown in FIG. 4, the side plate portion 40 (45) is folded to the outer surface side 40B (45B) side. When the thin plate portion 50 is folded on the outer surface 40B (45B) side of the side plate portion 40 (45) as described above, it is possible to assemble the box-shaped main body 20 with the articles to be stored placed on the bottom plate portion 25 in advance. , Work efficiency is improved. Although not shown, it is also possible to fold the thin plate portion 50 on the inner surface 40A, 45A side of the side plate portions 40, 45. When the thin plate portion 50 is folded on the inner surface 40A, 45A side of the side plate portions 40, 45, the thin plate portion 50 can be prevented from being exposed to the outside when the box-shaped main body 20 is assembled.

  In the thin plate portion 50, the thickness is set to 0.1 to 1.5 mm from the viewpoint of easy folding and strength. When the thickness of the thin plate portion 50 is less than 0.1 mm, there is a problem that it is difficult to obtain sufficient strength and is easily damaged. When the thickness is thicker than 1.5 mm, the thin plate portion 50 at the time of folding becomes too thick, making folding difficult and the folded part unnaturally thick, impairing the appearance and preventing the storage of the article, etc. Problem arises. The thickness of the thin plate portion 50 of the embodiment is 1 mm.

  Moreover, as shown in FIGS. 1, 3, 4, and 6, it is preferable to form thin portions 42 and 47 for accommodating the thin plate portion 50 at the folding positions of the side plate portions 40 and 45, respectively. The thin portions 42 and 47 are concave portions formed thinner than the thickness of the side plate portions 40 and 45, and the folding side surface of the thin plate portion 50 (in the case where the thin plate portion 50 is folded on the inner surfaces 40A and 45A side, the inner surface 40A). 45A and the outer surfaces 40B and 45B are provided on the outer surfaces 40B and 45B). In the embodiment, thin portions 42 and 47 are formed on the outer surfaces 40B and 45B.

  The shape of the thin portions 42 and 47 is not particularly limited as long as the folded thin plate portion 50 can be stored. The thin portions 42 and 47 are formed so that the folded thin plate portion 50 can be accommodated and is thinner than the side plate portions 40 and 45 and thicker than the thin plate portion 50. 5 mm. When the thickness of the thin portions 42 and 47 is greater than 1.5 mm, it is difficult to ensure a sufficient space for accommodating the thin plate portion 50, and when the thickness is less than 0.5 mm, there is a problem in strength. As shown in FIGS. 1, 6, and 7, the thin portions 42 and 47 of the embodiment are substantially triangular shapes formed adjacent to the thin plate portion 50, and each has a thickness of 1 mm.

  By accommodating the thin plate portion 50 folded on the thin portions 42 and 47, the thin plate portion 50 is prevented from excessively protruding from the inner surfaces 40A and 45A or the outer surfaces 40B and 45B of the side plate portions 40 and 45. Can do. When the thin plate portion 50 is folded on the inner surface 40A, 45A side, the storage of the article is not hindered and the functionality is not impaired. When the thin plate portion 50 is folded on the outer surfaces 40B and 45B side, the appearance is not impaired because the thin plate portion 50 is substantially flush with the outer surfaces 40B and 45B.

  As shown in FIGS. 2, 6, and 7, the groove portion 60 is formed by cutting away from the end side portions 41 and 46 in the vicinity of the folding position of the thin plate portions 50 of the side plate portions 40 and 45. In the embodiment, the thin plate portion 50 is formed at a position adjacent to the position of the vertex 52 when the thin plate portion 50 is folded on the side plate portions 40 and 45 and not overlapping the thin plate portion 50. 2A is a groove formed near the folding position of the side plate 40 on the end plate 30 side, and 60B is a groove formed near the folding position of the side plate 40 on the end plate 35 side. 60C is a groove formed in the vicinity of the folding position of the side plate 45 on the end plate 30 side, and 60D is a groove formed in the vicinity of the folding position of the side plate 45 on the side of the end plate 35.

  Moreover, each groove part 60 has the horizontal groove part 65 formed in the lower part toward the center side of the side-plate parts 40 and 45, and is formed in a substantially L shape by the side view. In the embodiment, the lateral groove portion 65A of the groove portion 60A of the side plate portion 40 is formed toward the center side of the side plate portion 40, that is, the opposite side of the end plate portion 30, and the lateral groove portion 65B of the groove portion 60B is the center side of the side plate portion 40, that is, the end plate portion. The groove part 60 </ b> A and the groove part 60 </ b> B are symmetrically arranged on the side plate part 40. Similarly, the lateral groove portion 65C of the groove portion 60C of the side plate portion 45 is formed toward the opposite side of the end plate portion 30, and the lateral groove portion 65D of the groove portion 60D is formed toward the opposite side of the end plate portion 35. The groove portion 60 </ b> D is symmetrically disposed on the side plate portion 45.

  As shown in FIGS. 1 and 2, the engaging portion 70 is provided at both ends of the end side portions 31 and 36 of the end plate portions 30 and 35 via the bent portions 32 and 37, and the inner surfaces 30A and 35A of the end plate portions 30 and 35. The side plate portions 30, 35 are sandwiched together with the thin plate portion 50 folded on the side plate portions 30, 35, and the tips are engaged with the groove portions 60. In the embodiment, an engagement portion 70A engaged with the groove portion 60A is formed on the side plate portion 40 side of the end plate portion 30, and an engagement portion 70C engaged with the groove portion 60C is formed on the side plate portion 45 side. An engagement portion 70B that is engaged with the groove portion 60B is formed on the side plate portion 40 side of 33, and an engagement portion 70D that is engaged with the groove portion 60D is formed on the side plate portion 45 side.

  As shown in FIGS. 5 and 6, the engaging portion 70 includes a flat plate-like main body 71, sandwiching pieces 72 and 73 erected on both sides of the main body 71, and both sides of the tip end of the main body 71. An accommodating recess 75 is formed by the engaging piece 74 erected and connected to the sandwiching pieces 72 and 73. At the time of bending, as shown in FIGS. 6 to 9, the engaging piece 74 is inserted into and engaged with the groove portion 60, and the side plate portion 40 (45) and the end portion of the folded thin plate portion 50. 41 (46), 53 side is housed in the housing recess 75 and sandwiched by the sandwiching pieces 72, 73. Accordingly, the side plate portion 40 (45) and the end side portions 41 (46) and 53 of the folded thin plate portion 50 can be prevented from being exposed, and deterioration of the appearance can be suppressed, and the thin plate portion 50 can be folded. The overlapping state can be easily and reliably maintained. In the embodiment, the sandwiching pieces 72 and 73 are formed so as to be inclined from the bent portion 32 (37) side toward the tip side.

  Further, the engaging portion 70 is preferably formed with a claw portion 76 that is engaged with the lateral groove portion 65 when bent at the tip thereof. In the embodiment, a claw portion 76 projects from the engagement piece 74 and is formed in a substantially L shape in side view as shown in FIG. As a result, the engaging piece 74 and the claw portion 76 integrally formed in a substantially L shape in side view are engaged with the groove portion and the lateral groove portion 65 integrally formed in a substantially L shape in side view, respectively. The engaging part 70 can be reliably fixed to the parts 40 and 45, and the engagement can be easily prevented from being released unexpectedly. In FIG. 2, reference numerals 76A, 76B, 76C, and 76D denote the claw portions of the corresponding engaging portions 70A, 70B, 70C, and 70D, respectively.

  Further, in this folding box 10, as shown in FIGS. 1 and 2, the end side portions 31 and 36 of the end plate portions 30 and 35 are bent to the side of the end plate portion inner surfaces 30A and 35A via the bent portions 32 and 37, respectively. Possible end frame portions 80 (80A, 80B) are integrally formed with the engaging portions 70 (70A, 70B, 70C, 70D), and are formed on the end sides 41, 46 between the groove portions 60 of the side plate portions 40, 45. Are formed with side frame portions 85 (85A, 85B) projecting toward the side plate portion inner surfaces 40A, 45A. By forming the frame portions 80 and 85, the strength of the assembled box-shaped main body 20 can be easily increased.

  In this folding box 10, as the material constituting each of the plate portions 25, 30, 35, 40, 45 and the engaging portion 70, a lightweight, shape-retaining synthetic resin foam, corrugated cardboard, laminated paper, etc. Material can be used. In particular, it is preferable that each plate part 25, 30, 35, 40, 45 and the engaging part 70 are made of a synthetic resin foam from the viewpoint of protection and heat retention. Synthetic resins to be used are polystyrene, polypropylene, polyethylene, polyvinyl chloride, and the like, and are made of these foam molded products. In addition, when each plate part 25, 30, 35, 40, 45 and the engaging part 70 are made of a synthetic resin foam, each bent part 21, 22, 23, 24, 32, 37, thin plate part 50, thin wall The parts 42, 47 and the like can be easily formed by using known heat compression or the like.

  Moreover, in this folded box 10, you may affix a laminate sheet on the single side | surface or both surfaces of each plate part 25,30,35,40,45 and the engaging part 70 which consist of a synthetic resin foam. As the laminate sheet, a known synthetic resin film such as polyethylene, polystyrene, or polypropylene is preferably used. According to this laminate sheet, the outer surface of the folded box 10 can be easily decorated by printing appropriate characters, patterns, patterns, and the like. In particular, when the end frame portions 80 are formed on the end plate portions 30 and 35 and the side frame portions 85 are formed on the side plate portions 40 and 45, respectively, the exposure of the end side portions 31, 36, 41, and 46 is prevented. And deterioration in appearance can be suppressed. Furthermore, each bending part 21,22,23,24,32,37 can also be reinforced by sticking a laminate sheet. In addition, in this folding box 10, it is also possible to adhere to each plate portion 25, 30, 35, 40, 45 and the engaging portion 70 so that the thin plate portion 50 is formed by this laminate sheet.

  Although not shown, the folding box 10 can be configured to be openable and closable by providing an appropriate lid on the upper opening 20A of the box-shaped main body 20 as necessary. As a cover part, a plate-shaped member can be integrally provided so that it can be bend | folded at any one (one opening) or both (double opening) of each side plate part 40 and 45, for example. Thus, by providing the lid part integrally, the upper opening part of the box-shaped main body can be opened and closed with an easy and extremely simple configuration, and the protection and heat retention can be improved.

  Further, the lid may be configured to be detachable from the box-shaped main body 20. If the lid part is detachable, the use of the lid part or the non-use of the same folding box 10 can be appropriately selected according to the use, and the versatility of the folding box 10 is improved. Even when a detachable lid is used, it goes without saying that the protection and heat retention can be improved as in the case of the integrally provided lid.

  Furthermore, it is good also considering a cover part as a transparent synthetic resin film. As the synthetic resin film, known synthetic resin films such as polyethylene, polystyrene, polypropylene, and PET resin are suitably used. If a transparent synthetic resin film is used as a lid in this way, the contents can be seen from the outside even when the upper opening 20A of the box-shaped main body 20 is closed, and displayed as it is in the store as it is. can do. Thereby, it becomes possible to suitably use the folded box 10 for a cold chain or the like.

  Next, how to assemble the folded box 10 of the present invention will be described. In this folding box 10, first, the end plate portions 30, 35 and the side plate portions 40, 45 are erected approximately 90 ° via the bent portions 21, 22, 23, 24. At that time, as shown in FIG. 4A, the thin plate portions 50 connecting the end plate portions 30 and 35 and the side plate portions 40 and 45 are bent through the easy-folding portion 51, and FIG. As shown to b), it is folded up so that it may be accommodated in the thin parts 42 and 47 by the outer surface 40B and 45B side of the side-plate parts 40 and 45. FIG.

  After the respective thin plate portions 50 are folded on the respective side plate portions 40 and 45, subsequently, as shown in FIG. 6 and FIG. The plate portions 30 and 35 are bent toward the inner surfaces 30A and 35A. Here, in the bent engagement portion 70, as shown in FIG. 7B, the claw portion 76 formed at the tip is elastically bent and inserted into the groove portion 60 together with the engagement piece 74. As shown in (c), the claw portion 76 bent when reaching the lateral groove portion 65 is restored, and the groove portion and the lateral groove portion 65 integrally formed in a substantially L shape in side view are substantially L-shaped in side view. The engagement piece 74 and the claw portion 76 that are integrally formed in a shape are engaged with each other.

  By engaging the engaging portion 70 with the groove portion 60, as shown in FIGS. 7C and 8, the side plate portions 40, 45 and the end sides 41, 46, 53 of the folded thin plate portion 50 are provided. The side is accommodated in the accommodating recess 75 of the engaging portion 70. In addition, as shown in FIGS. 8 and 9, the side plate portions 40, 45 and the end sides 41, 46, 53 side of the folded thin plate portion 50 are sandwiched by sandwiching pieces 72, 73 of the engaging portion 70. The assembly of the box-shaped main body 20 is completed.

  As described above, in the folded box 10 of the present invention, when the end plate portions 30 and 35 and the side plate portions 40 and 45 are erected, the adjacent end plate portions 30 and 35 and the side plate portions 40 and 45 are adjacent to each other. And the side plate portions 40, 45 can be closed with a very simple configuration, and the corner portions 11, 12, 13 can be closed. , 14 can be effectively prevented from reducing the heat retention effect due to water leakage from the gaps 14 and the intrusion of outside air. At the same time, the engaging portion 70 is engaged with the groove portion 60 of the side plate portions 40, 45 and sandwiches the side plate portions 40, 45 together with the thin plate portion 50 folded over the side plate portions 40, 45. The box-shaped main body 20 can be assembled by a simple procedure.

  In particular, when the engaging portion 70 is bent and the engaging piece 74 is engaged with the groove portion 60, the side plate portions 40, 45 and the end side portions 41, 46, 53 side of the folded thin plate portion 50 become the receiving recess 75. By being accommodated and sandwiched by the sandwiching pieces 72 and 73, the side plate portion 40 (45) and the end portions 41 (46) and 53 of the folded thin plate portion 50 are prevented from being exposed, and the appearance is improved. While being able to suppress a fall, the folded state of the thin-plate part 50 can be hold | maintained easily and reliably.

  Moreover, if each board part 25,30,35,40,45 and the engaging part 70 are comprised with a synthetic resin foam, the folding box 10 which is lightweight and excellent in protective property and heat retention property can be provided. The folding box 10 can be suitably used for storing and transporting fresh food such as fruits, vegetables, raw meat, and fresh fish, frozen food, ice confectionery, and the like. Furthermore, this folding box 10 is suitable for the case where foods such as side dishes, lunch boxes, sushi, cakes, etc. are boxed and sold at stores.

  The folding box of the present invention is not limited to the above-described embodiments, and can be implemented by appropriately changing a part of the configuration without departing from the spirit of the invention. For example, an auxiliary fixing member such as a stapler or a string may be used in order to more securely fix the thin plate portion folded on the side plate portion. At this time, if the fixing position by the auxiliary fixing member is set to a position that can be accommodated in the accommodating recess of the engaging portion, the auxiliary fixing member is not exposed to the outside, and there is no possibility that the appearance is deteriorated.

10 Folding box 11, 12, 13, 14 Corner part 20 Box-shaped main body 21, 22, 23, 24 Bending part 25 Bottom plate part 30, 35 End plate part 40, 45 Side plate part 42, 47 Thin part 50 Thin part 60 Groove part 70 Engagement portion 80 End frame portion 85 Side frame portion a, b Vertical side portion c, d Horizontal side portion

Claims (10)

A rectangular bottom plate portion composed of parallel vertical side portions (a, b) and horizontal side portions (c, d), and an end plate connected to each vertical side portion of the bottom plate portion via a bent portion. And side plate portions connected to each lateral side portion of the bottom plate portion via bent portions, and the end plate portions and the side plate portions are erected via the respective bent portions. A folding box that assembles a box-shaped body,
In each corner connecting the end plate and the side plate, the end plate and the side plate adjacent to each other when the end plate and the side plate are erected, are integrally connected. And a thin plate portion that is folded on the side plate portion is formed,
The side plate portion has a groove portion formed by cutting out from the end portion in the vicinity of the folding position of each thin plate portion,
The side plate portions can be bent at both ends of the end side portions of the end plate portions through the bent portions to the inner surface side of the end plate portions, and the side plate portions are sandwiched together with the thin plate portions folded on the side plate portions at the time of bending. And a folding box having an engaging portion whose tip is engaged with the groove.   The engaging portion includes a flat plate-like main body, a sandwich piece standing on both sides of the body, and an engagement standing on the front end side of the main body so as to be connected to the sandwich piece on both sides. A receiving recess is formed by the piece, and at the time of the bending, the engaging piece is inserted into the groove and engaged, and the side plate and the end side of the folded thin plate are formed in the receiving recess. The folding box according to claim 1, wherein the folded box is accommodated and sandwiched by the sandwiching pieces.   A lateral groove portion formed toward the center side of the side plate portion is integrally formed at a lower portion of the groove portion, and a claw portion that is engaged with the lateral groove portion when bent is formed at a tip of the engagement portion. Item 3. The folding box according to item 1 or 2.   The folding box of any one of Claim 1 thru | or 3 in which the thin part which accommodates the said thin plate part in the said side plate part is formed.   The folding box according to any one of claims 1 to 4, wherein the thin plate portion is folded on the outer surface of the side plate portion.   An end frame portion that can be bent to the inner surface side of the end plate portion via the bent portion is formed integrally with the engaging portion on the end side portion of each end plate portion, and each of the side plate portions The folding box according to any one of claims 1 to 5, wherein a side frame portion protruding toward an inner surface side of the side plate portion is formed at the end side portion between the groove portions.   The folding box according to any one of claims 1 to 6, wherein the bottom plate portion, the end plate portion, and the side plate portion have a thickness of 1.5 to 6 mm.   The folding box according to any one of claims 1 to 7, wherein the thin plate portion has a thickness of 0.1 to 1.5 mm.   The folding box according to any one of claims 1 to 8, wherein each of the plate portions is made of a synthetic resin foam.   The folding box according to claim 9, wherein a laminate sheet is adhered to one or both sides of each plate portion made of the synthetic resin foam.

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