JP2015178381A - Plastic structure, plastic carton, and method for manufacture thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plastic structure which can be easily folded, a plastic carton, and method for manufacturing them.SOLUTION: A plastic structure is made of a hollow resin sheet material 10 in which a hollow part 10D is formed by interposing a rib 10C between a pair of parallel liner panels 10A, 10B of a synthetic resin, in which a groove is formed by cutting off a part of one liner panel 10A and a part of the rib 10C. The groove has a width equal to or more than a thickness of the hollow resin sheet material and less than or equal to a sum of the thickness of the hollow resin sheet material and 2 mm. One side part of the groove can be folded onto a bottom 15A of the groove.

Description

  The present invention relates to a plastic structure that can be easily bent and a plastic cardboard box using the plastic structure.

  In recent years, a plastic cardboard box made of a hollow resin plate made of synthetic resin such as polypropylene has been used as a storage container. A plastic cardboard box has a feature that, for example, it is superior in durability to a paper cardboard box and can be used repeatedly. Such a plastic corrugated cardboard box is formed by, for example, punching a hollow resin sheet original plate, inserting a fold line, bending it, and then assembling it. It is assembled by bending using (see, for example, Patent Document 1).

JP 2010-36405 A

  However, the hollow resin plate material that is thick and hard has a problem that it is difficult to make a fold line and it cannot be easily folded even if it is creased. In addition, there has been a problem that a special folding work is required for a beautiful folding process. In addition, when a fold line is placed when performing die cutting with a die cutter, there is a problem that a large die is required and a place for the die is necessary.

  The present invention has been made based on such problems, and an object of the present invention is to provide a plastic structure, a plastic cardboard box, and a method for manufacturing them that can be easily folded.

  The plastic structure of the present invention comprises a hollow resin plate material in which a rib is formed between a pair of parallel liner plates made of synthetic resin to form a hollow portion, and a groove formed by cutting one of the liner plates and the rib. The width of the groove is equal to or greater than the thickness of the hollow resin plate material and equal to or smaller than the thickness of the hollow resin plate material plus 2 mm, and one side of the groove is brought into contact with the bottom of the groove. It can be bent.

  The plastic cardboard box of the present invention is made of a hollow resin plate material in which a hollow portion is formed by interposing a rib between a pair of parallel liner plates made of synthetic resin, and cuts one of the liner plate and the rib. And the width of the groove is not less than the thickness of the hollow resin plate and not more than 2 mm plus the thickness of the hollow resin plate, and one side of the groove is formed at the bottom of the groove. It is formed in a box shape by being bent so as to contact.

  The method for producing a plastic structure according to the present invention is a method for producing the plastic structure according to the present invention, in which an original plate of a hollow resin plate material is cut into a predetermined shape and one liner plate at a position corresponding to a bent portion. And a rib is cut out and a groove | channel is formed.

  The method for producing a plastic cardboard box according to the present invention is a method for producing the plastic cardboard box according to the present invention, in which an original plate of a hollow resin plate material is cut into a predetermined shape and at one of the positions corresponding to the bent portion. A liner plate and a rib are cut out to form a groove.

  According to the plastic structure and the plastic cardboard box of the present invention, the groove is formed by cutting out one liner plate and rib, so that one side of the groove is brought into contact with the bottom of the groove. By folding the other liner plate, it can be easily folded.

  According to the plastic structure manufacturing method and the plastic corrugated cardboard box manufacturing method of the present invention, the hollow resin plate material is cut into a predetermined shape and a groove is formed at a position corresponding to the bent portion. The plastic structure and plastic corrugated cardboard box of the present invention can be easily manufactured, and there is an effect that a mold is not required and a storage space such as a mold is not required.

It is a figure showing the structure of the plastic structure which concerns on one embodiment of this invention, and a plastic cardboard box. It is a figure which expands and represents a part of plastic structure shown in FIG. 1 and a plastic cardboard box.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

  FIG. 1 shows the structure of a plastic structure 1 and a plastic cardboard box 2 according to an embodiment of the present invention, (A) is a development view showing the plastic structure 1, and (B) 1 is a perspective view showing a plastic cardboard box 2. FIG. FIG. 2 is an enlarged view of a part of FIG. 1, (A) and (B) show a developed state, (C) shows a state where (A) is bent, and (D) shows The state which bent (B) is represented. (A) and (B) in FIG. 2 show different portions in an enlarged manner by changing the viewing direction by 90 degrees. The plastic structure 1 is, for example, a plastic cardboard box 2 developed, and the plastic cardboard box 2 is, for example, a plastic structure 1 assembled in a box shape.

  The plastic structure 1 and the plastic cardboard box 2 are constituted by a hollow resin plate material 10 in which a hollow portion 11D is formed by interposing a rib 10C between a pair of parallel liner plates 10A and 10B made of synthetic resin. . The plastic structure 1 and the plastic cardboard box 2 are, for example, a so-called caramel box type, and include four body surface parts 11A, 11B, 11C, and 11D that form a cylindrical body part, and a pair of outer flap parts 12A and 12B. And two pairs of inner flap portions 13A, 13B, 13C, 13D, and a joining margin portion 14. Each of the body surface portions 11A, 11B, 11C, 11D, the outer flap portions 12A, 12B, the inner flap portions 13A, 13B, 13C, 13D, and the joining margin portion 14 are integrated with each other via a bent portion 15, for example. Is formed.

  For example, the body surface portions 11A, 11B, 11C, and 11D are continuously provided in one direction via the bent portion 15, and the outer flap portions 12A and 12B are connected to the other body surface 11B with respect to one body surface portion 11B. On both sides in a direction not continuous with the surface portions 11A and 11C, they are respectively provided continuously via the bent portions 15. Further, the inner flap portions 13A, 13B, 13C, 13D are, for example, bent portions 15 on both sides in a direction not continuous with the body surface portion 11B with respect to the body surface portions 11A, 11C located on both sides of the body surface portion 11B. Are provided in succession. The joining margin part 14 joins both ends of each continuously provided body surface part 11A, 11B, 11C, 11D. For example, the body surface part 11C with respect to the body surface part 11D located at one end part. Is provided continuously on the side opposite to the side with the bent portion 15 interposed therebetween.

  The bent portion 15 is constituted by, for example, a groove formed by cutting out one liner plate 10A of the hollow resin plate material 10 and cutting out the rib 10C at the same location. The width of the groove, that is, the width of the bent portion 15 is not less than the thickness of the hollow resin plate 10 and not more than the size of the thickness of the hollow resin plate 10 plus 2 mm, and one side of the groove on the bottom 15A of the groove. 15B can be bent so as to contact. It is more preferable that the width of the groove is, for example, not more than a size obtained by adding 1 mm to the thickness of the hollow resin plate material 10, and more preferably not more than a size obtained by adding 0.5 mm to the thickness of the hollow resin plate material 10. This is because if the width of the groove becomes too wide, the strength of the plastic cardboard box 2 is lowered.

  The plastic structure 1 and the plastic cardboard box 2 can be manufactured as follows, for example. First, an original plate of the hollow resin plate material 10 is prepared and cut into a predetermined shape by, for example, a laser cutter. In addition, you may cut out using not only a laser cutter but other cutting means, such as a thread saw. For example, as described above, the body surface portions 11A, 11B, 11C, 11D and the joining margin portion 14 are continuously provided, and the outer flap portions 12A, 12B and the inner flap portions 13A, 13B, 13C and 13D are cut into the respective shapes.

  Next, for example, by using a mirror cutter (milling machine), one liner plate 10A and rib 10C are cut out at a position corresponding to the bent portion 15 to form a groove. Specifically, for example, each body surface part 11A, 11B, 11C, 11D, each outer flap part 12A, 12B, each inner flap part 13A, 13B, 13C, 13D, and the boundary where the joining margin part 14 continues. In the position, one liner plate 10A and rib 10C are cut out. In addition, you may cut not only using a mirror cutter (milling machine) but using another cutting means. Thereby, the plastic structure 1 in which the groove is formed is obtained.

  In the plastic structure 1, for example, in the bent portion 15, the other liner plate 10B is bent so that one side portion 15B of the groove is brought into contact with the bottom portion 15A of the groove, and the body surface portion 11A facing the joining margin portion 14 is formed. Are assembled into a plastic cardboard box 2.

  As described above, according to the present embodiment, since the groove is formed by cutting out a part of one liner plate 10A and a part of rib 10C, the bent portion 15 is only the other liner plate 10B. By folding the other liner plate so that one side 15B of the groove is brought into contact with the bottom 15A of the groove, it can be easily bent.

  Moreover, since the hollow resin plate is cut into a predetermined shape and a groove is formed at a position corresponding to the bent portion, the plastic structure 1 and the plastic cardboard box 2 according to the present embodiment can be easily formed. Can be manufactured. Furthermore, since it can be formed by using a laser cutter or a mirror cutter (milling machine), there is an effect that a die-cutting or the like is not necessary and a place for die-cutting is not necessary.

  The present invention has been described with reference to the embodiment. However, the present invention is not limited to the above embodiment, and various modifications can be made. For example, in the above-described embodiment, an example of a caramel box type has been specifically described. However, the present invention can be similarly applied to caramel box types having other structures, and the same applies to other shapes. Can be applied to. Furthermore, the present invention is not limited to a plastic cardboard box and is made of a hollow resin plate material, and can be widely applied to a case where a part is bent.

  In addition, FIG. 2 specifically shows the case where a plurality of plate-like ribs 10C extending in one direction are provided side by side between the pair of liner plates 10A and 10B, but the shape of the rib 10C is a pair of liner plates. Any shape may be used as long as the space portion 11D is formed between 10A and 10B. For example, the ribs 10C may be formed in a hollow cylindrical shape or a hollow prism shape, and a plurality of the ribs 10C may be provided side by side between the pair of liner plates 10A and 10B.

  It can be used for plastic cardboard boxes.

  DESCRIPTION OF SYMBOLS 1 ... Plastic structure, 2 ... Plastic cardboard box, 10 ... Hollow resin board material, 10A, 10B ... Liner board, 10C ... Rib, 10D ... Hollow part, 11A, 11B, 11C, 11D ... Body surface part, 12A, 12B ... Outer flap part, 13A, 13B, 13C, 13D ... Inner flap part, 14 ... Joining part, 15 ... Bending part, 15A ... Bottom part, 15B ... Side part

Claims (4)

It consists of a hollow resin plate material in which a hollow portion is formed by interposing a rib between a pair of synthetic resin parallel liner plates,
Having a groove formed by cutting one of the liner plates and the rib;
The width of the groove is not less than the thickness of the hollow resin plate material and not more than the size of 2 mm added to the thickness of the hollow resin plate material,
A plastic structure characterized in that it can be bent so that one side of the groove is brought into contact with the bottom of the groove. A plastic corrugated cardboard box made of a hollow resin plate material in which a hollow portion is formed by interposing a rib between a pair of parallel liner plates made of synthetic resin,
Having a groove formed by cutting one of the liner plates and the rib;
The width of the groove is not less than the thickness of the hollow resin plate material and not more than the size of 2 mm added to the thickness of the hollow resin plate material,
A plastic cardboard box, which is formed in a box shape by being bent so that one side of the groove is brought into contact with the bottom of the groove. A method for producing a plastic structure according to claim 1,
A method for producing a plastic structure, comprising: cutting an original plate of the hollow resin plate material into a predetermined shape, and cutting out one liner plate and a rib at a position corresponding to a bent portion to form a groove. A method for producing a plastic cardboard box according to claim 2,
A method for producing a plastic corrugated cardboard box, comprising: cutting an original plate of the hollow resin plate material into a predetermined shape, and cutting out one liner plate and a rib at a position corresponding to a bent portion to form a groove.

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