JP2006036288A - Folding returnable box for packing film roll - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a folding returnable box for packing a film roll, which is free from contamination of a packaged object by generated paper dust or degradation in strength due to wetting, is light-weighted but excellent in strength, and can be repetitively used for packaging and carrying a shrink film for food or the like. <P>SOLUTION: The folding returnable box for packing a film roll consists of a folding box body made of an antistatic synthetic resin plate having a maximum flexural strength of 3-15 MPa including a parallelopiped body which can be folded flat, a lid plate connected with the upper end of the side face of the parallelepiped body via a crease, and a bottom plate connected with the lower end of the side face via a crease, a specific upper surface inner lid, and a lower surface inner lid. Handles of such a structure that the inside and the outside of the box body do not communicate are provided at a position shifted fore-and-aft from the center line in a plan view on the opposite side surfaces of the box body, and loop-and-hook fasteners are provided on the lid plate and the bottom plate. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a foldable return box for packing film rolls, and more particularly to a foldable return box for film roll packing made of a synthetic resin plate that can be used repeatedly for storing and transporting film rolls.

  Conventionally, paper cardboard folding boxes have been used to wrap and transport film rolls such as food shrink films. An example of such a paper cardboard folding box is disclosed in Japanese Patent Laid-Open No. 2001-80689 (Patent Document 1).

  The paper cardboard folding box has been widely used because it is light and inexpensive, but it has a problem of contamination of the package due to the generation of paper dust and a drawback of being easily broken when wet. In addition, although it is inexpensive, there is a drawback that it is difficult to use repeatedly because of a large decrease in strength after one use, or because it cannot be cleaned even if dirt is attached.

  Therefore, the above problems and drawbacks can be solved, and development of a returnable box that can be used repeatedly for packaging and transporting film rolls is expected.

JP 2001-80689 A JP 2002-68166 A JP 10-45163 A JP 2000-142616 A

  The present invention improves the contamination of the article to be packaged due to the generation of paper dust, does not decrease the strength due to wetness with water, is excellent in strength even when lightweight, and can be used repeatedly for packaging and transporting food shrink films. An object of the present invention is to provide a foldable return box for film roll packaging.

According to the present invention, the following folding roll-through box for film roll packaging is provided.
[1] A rectangular tubular body having openings at the top and bottom and foldable into a plate shape;
A lid plate connected to the upper end of the side surface of the cylindrical body via a crease;
It consists of a bottom plate connected to the lower end of the side surface via a crease,
A foldable box body made of a synthetic resin plate having an antistatic function having a maximum bending strength of 3 to 15 MPa in the vertical and / or horizontal direction;
The inside of the box body is composed of an upper surface inner lid and a lower surface inner lid provided with a hole into which a film roll support member is inserted,
A grip portion having a structure in which the inside of the box body and the outside of the box body do not communicate with each other at a position shifted in the front-rear direction from the center line in a plan view is provided on the opposite side surfaces of the box body.
The cover plate and the bottom plate are provided with hook and loop fasteners.
[2] The folding roll-out box for film roll packaging according to [1], wherein a cutout portion and / or a hole portion are formed in the upper surface inner lid and the lower surface inner lid.
[3] Folding type returnable box for film roll packaging according to [1] or [2], wherein a label attaching part having an uneven surface is provided on a side surface or a cover plate of the box body .
[4] The film roll packaging according to any one of [1] to [3], wherein an anti-slip material is provided on at least one of a side surface, a cover plate, and / or a bottom plate of the box body. Foldable returnable box.
[5] The folding roll-up box for film roll packaging according to any one of [1] to [4], wherein the synthetic resin plate is a polyolefin resin foam plate.

According to the invention relating to claim 1 of the present invention, a rectangular tubular body, a foldable box body constituted by a cover plate and a bottom plate connected to the tubular body, and a film roll support member It is made up of a specific upper surface lid and a lower surface inner lid, and a specific gripping part and hook-and-loop fastener are provided, so that the film roll can be firmly fixed inside the box body, and dust and dirt There is provided a folding roll-up box for packing a film roll, which can improve adhesion of contaminants such as the film roll to the film roll and has excellent portability. In addition, since the box body is made of a specific synthetic resin plate, there is provided a foldable returnable box that is not damaged even when it gets wet with water, has excellent strength, and can withstand use for several tens of times.
According to the invention according to claim 2 of the present invention, the notch and / or the hole is formed in the upper and lower inner lids so that the upper and lower inner lids can be easily attached and detached. A tatami-style return box is provided.
According to the invention according to claim 3 of the present invention, since the label attaching portion having the uneven surface is provided at the specific location, the label that has been attached so far is easily peeled off and a new label is attached. Can be attached.
According to the invention relating to claim 4 of the present invention, since the anti-slip material is provided at a specific place, the slipperiness of the synthetic resin plate pass-through box is lowered and the load collapse prevention performance is excellent.
According to the invention according to claim 5 of the present invention, since the synthetic resin plate is made of a polyolefin resin foam plate, the folding type through which is excellent in durability, mechanical strength, workability, washability, and safety during handling. A box is provided.

Hereinafter, the folding roll-back box for film roll packaging of the present invention will be described in detail with reference to the drawings.
The folding roll-back box for film roll packaging of the present invention (hereinafter also simply referred to as a “pass-through box”) includes a folding box body made of a synthetic resin plate, an upper surface inner lid, and a lower surface inner lid. The box body houses a film roll and functions to protect the film roll from contaminants such as dust and dust, and the upper and lower inner lids function to fix the film roll and to the contaminant box body. The function to prevent the invasion of the material can also be expected. In addition, it is preferable that the upper surface inner lid and the lower surface inner lid are made of a synthetic resin like the box body.

  An example of the box body constituting the folding return box of the present invention is shown in FIGS. FIG. 1 is a perspective view showing an example of the box body of the present invention, and FIG. 2 is a developed plan view showing an example of the box body. However, the present invention is not limited to these drawings.

The box body 1 has an opening 2 at the top and bottom and is connected to the upper end of a side surface 4 of the cylindrical body through a crease 5 and a rectangular tubular body 3 that can be folded into a plate shape. And a bottom plate 7 connected to the lower end of the side surface 4 via a crease 5. Since the cylindrical body 3 constituting the box main body can be folded into a plate shape, after the film roll has been transported, it can be easily carried by folding it into a plate shape, so that it can be easily handled as a returnable box. .
In addition, since the horizontal cross section of a film roll is circular, the horizontal cross section of the cylindrical body 3 is preferably square, but in the present invention, a case where a plurality of film rolls are packed is also assumed, so that the rectangular shape may be used. Good.

  In order to configure the cylindrical body 3 to be foldable into a plate shape, as shown in FIG. 2, a fold 5 may be formed between the adjacent side surfaces of the cylindrical body. In addition, in order to configure the side surfaces 4a, 4b, 4c, and 4d of the four cylindrical bodies as a rectangular cylindrical body, for example, binding is performed via a crease 5 on the side end on the outer side of the side surface 4d of the cylindrical body. A margin 8 may be provided, and the position of the binding margin 8 and the corresponding position on the back side of the side surface 4a of the cylindrical body may be joined by thermal bonding or an adhesive. In this way, the side surfaces 4a to 4d of the four cylindrical bodies and the binding margin 8 are folded for each fold 5, and the side 4a and the side 4d are connected via the fold 5 at the binding margin 8. A foldable rectangular tube-shaped tubular body 3 can be formed. Further, as shown in FIG. 2, a binding margin 8 is provided on the outer side edge of the side surface 4d of the cylindrical body via a crease 5, a surface fastener 9a is provided on the front side of the binding margin 8, and the surface fastener 9a is attached. You may provide the hook_and_loop | surface fastener 9b in the position of the back side of the side surface 4a of a cylindrical body corresponding to the provided position.

A lid plate 6 is provided at the upper end of the side surface 4 of the cylindrical body via a fold 5, and a bottom plate 7 is provided at the lower end of the side surface 4 via the fold 5. Specifically, for example, as shown in FIG. 2, lid plates 6 a, 6 b, 6 c, 6 d having the same shape are provided on the side surfaces 4 a, 4 b, 4 c, 4 d of the four cylindrical bodies via folds 5. Preferably, the upper surface of the cylindrical body is covered when the lid plate 6a and the lid plate 6c are tilted, and the upper surface of the cylindrical body is overlapped and covered when the lid plate 6b and the lid plate 6d are tilted. It is preferable to be configured. The same applies to the bottom plates 7a, 7b, 7c and 7d.
However, the present invention is not limited to FIG. 2, and a cover plate must be provided on each of the side surfaces of the four cylindrical bodies as long as the upper and lower surfaces of the cylindrical bodies can be closed. It does not have to be, and the shape of each cover plate may be different.

  The crease formed in the box body of the present invention is provided by a well-known method such as melting with a hot blade, cutting with a cutting blade, or press forming with a pressing blade to form a concave groove such as a V-shape or U-shape. be able to. Further, when the synthetic resin plate material is made of a foamed plate in particular, as a preferred embodiment of the crease forming method, for example, a rubber elastic body disposed in close contact with the pressing blade on both sides of the fold forming pressing blade is used. By using it, a crease having a good finish is formed by suppressing the entrainment of the surrounding foam plate accompanying the formation of the crease. In addition, when the crease is composed of a plurality of lines, if a rubber elastic body is disposed in close contact with the pressing blade on both outer sides of the outermost fold forming pressing blade, a rubber elastic body is provided between the pressing blades. There is no problem even if it is not arranged. In addition, for example, when the fold is composed of three grooves, it is preferable that the middle groove is deepest. By forming in such a manner, it is possible to fold straight with the central concave groove as the center, and it becomes easy to bend with good finish. The depth of the crease is determined by the relationship with the thickness of the synthetic resin plate to be used. In general, the deeper the depth, the easier the folding, while the crease tear strength decreases, and the crease remains. If the thickness is less than 0.7 mm, the tear strength of the crease groove may be greatly reduced. The folds are formed at a connecting portion between the side surfaces of the cylindrical body, a connecting portion between the cover plate and the side surface, and a connecting portion between the bottom plate and the side surface. Such a fold can be formed at a predetermined position by punching the box body from the synthetic resin plate and at the same time by pressing using a pressing blade. The crease may be a single groove, but depending on the size of the box body, the thickness of the synthetic resin plate used, etc., it is composed of a plurality of adjacent grooves, generally two to five. It is preferable that it is easy to fold, and since it is difficult for distortion to occur at the fold, the durability of the groove can be improved.

Each of the lid plate 6 and the bottom plate 7 is provided with a hook-and-loop fastener 10, and the lid plates 6 and the bottom plates 7 are overlapped with each other so that the hook-and-loop fasteners 10 are pressed and fixed to each other to fix the tubular body 3. Each of the upper and lower surfaces can be closed.
Specifically, for example, as shown in FIG. 2, a surface fastener 10a is provided on the front side of the cover plate 6b, and the cover plate 6a and the cover plate 6c are arranged so as to correspond to the positions where the surface fastener 10a is provided on the cover plate 6b. A hook-and-loop fastener 10b is provided on the back side, and a hook-and-loop fastener 10c is provided on the front side of the lid plate 6d. It is preferable to provide the fastener 10d. Similarly, it is preferable to provide hook-and-loop fasteners 10a, 10b, 10c and 10d for the bottom plates 7a, 7b, 7c and 7d.
However, the present invention is not limited to the method of attaching the hook-and-loop fastener in FIG. 2, and the hook-and-loop fastener is provided in any manner as long as the hook plate 6 and the bottom plate 7 can be closed to fix the hook-and-loop fasteners together. Also good.

  As shown in FIG. 1, gripping portions 11 having a structure in which the inside of the box body and the outside of the box body do not communicate with each other are provided on the opposite side surface 4 b and side surface 4 d of the box body 3 of the present invention. Is provided at a position shifted in the front-rear direction from the center line LL in plan view. When the gripping portion is provided, when the film roll is packed, in the pair of gripping portions provided on the opposite side surfaces, one gripping portion is located rearward of the center line LL, and the other This is convenient for carrying the box body because the grip portion is positioned forward of the center line LL. Further, since the gripping portion is provided at a position shifted in the front-rear direction from the center line, the inner surface of the gripping portion does not come into strong contact with the film roll, and there is no possibility of damaging the film roll. In addition, the grip portion 11 has a structure in which the inside of the box body does not communicate with the outside of the box body, that is, since the grip portion does not have a through hole for inserting a finger, contaminants such as dust and dust pass through the grip portion 11 and the box. There is no intrusion inside the body.

As a preferred example of the gripping part, as shown in FIG. 2, an attachment hole 12 of an appropriate size is opened in the upper part of the side face 4b and the side face 4d, and the outer part 13a of the gripping tool 13 as shown in FIG. For example, the outer portion 13a and the inner portion 13b of the gripping tool 13 may be bent from the bent portion 14 so that the fitting portion 15a and the fitting portion 15b are fitted together.
However, the gripping part of the present invention is not limited to the gripping tool 13 shown in FIG. 3 as long as the inside of the box body and the outside of the box body do not communicate with each other.

It is preferable that a label attaching portion 21 having an uneven surface is provided on the side surface 4 or the cover plate 6 of the box body 3. When such a labeling part is provided, the label that has been pasted up to that point is easily peeled off, and a label that describes the product number, standard, date of manufacture, etc. of the film roll to be newly stored is pasted be able to. As the label attaching portion, an embossed thermoplastic resin sheet such as a polypropylene resin or a polyester resin can be used. Moreover, the surface of a synthetic resin board can be directly made into an uneven | corrugated surface by pressing the synthetic resin board which comprises a return box, and a label attaching part can also be provided.
In the example shown in FIGS. 1 and 2, the label attaching portion is provided at the upper left portion of the side surface 4 c, but the present invention is not limited to this, and the lid plate 6 is closed. As long as the display of the label can be confirmed, it is only necessary to be provided at any position on the side surface 4 or the cover plate 6 in an appropriate size.

  It is preferable that an anti-slip material 22 is provided on at least one of the side surface 4, the cover plate 6 and / or the bottom plate 7 of the box body 3. If the anti-slip material 22 is provided, when folding folding boxes are stacked, the upper folding folding box can be prevented from slipping down, and the load collapse prevention performance is enhanced. The anti-slip material can be provided by a method of spotting an elastic material such as rubber or synthetic resin at a predetermined position or a method of coating at a predetermined position. A foam made of an elastic material can also be used as the anti-slip material.

  The box body used in the present invention is made of a synthetic resin plate having a maximum bending strength of 3 to 15 MPa in the vertical direction and / or the horizontal direction. Examples of the synthetic resin plate include a synthetic resin cardboard and a synthetic resin foam plate. When the maximum bending strength is less than 3 MPa, the mechanical strength is insufficient, so that there is a possibility that it cannot be used as a returnable box for a film roll. On the other hand, in the case of more than 15 MPa, the amount of resin constituting the synthetic resin foam board and the corrugated cardboard increases, so there is a risk that the lightness may be insufficient. It is preferable that the strength is 3 to 15 MPa and the other maximum bending strength does not exceed 15 MPa, or that the maximum bending strength in the longitudinal and lateral directions is 3 to 15 MPa. From this viewpoint, the maximum bending strength in the vertical direction and / or the horizontal direction of the synthetic resin plate is preferably 3 to 13 MPa, and more preferably 3 to 10 MPa.

  In this specification, the maximum bending strength means that the test piece dimensions are 100 mm in length, 25 mm in width, the thickness is the total thickness of the synthetic resin plate, the distance between fulcrums is 50 mm, the test speed is 10 mm / min, the pressure wedge radius and the support The maximum bending strength is calculated based on the maximum load according to the bending test method for hard plastics of JIS K7203 (1982) except that the base radius is 5 mm.

  As a synthetic resin board which comprises a box main body, the synthetic resin foam board obtained by the conventionally well-known synthetic resin corrugated cardboard and the extrusion foaming method is mentioned. Further, the synthetic resin plate is not limited to a single layer, and includes those in which a resin layer made of a synthetic resin is laminated on both sides or one side of a synthetic resin corrugated cardboard or a synthetic resin foam plate. Synthetic resin plates are more cleanable, more uniform in the vertical and horizontal bending strengths, and fingertips at the end of the lid plate when opening and closing the cover plate A synthetic resin foam plate that is superior in terms of cut prevention and the like is more preferable.

  Moreover, the resin layer provided as needed on both surfaces or one surface of the said synthetic resin board can be laminated | stacked and integrated by a conventionally well-known method. Specifically, the resin layer can be laminated by a method of laminating a resin layer using heat fusion or an adhesive, or a coextrusion method. Although various synthetic resins can be used as the resin constituting the resin layer, it is preferable to use a resin having the same quality as the resin constituting the synthetic resin plate. For example, when the box body is made of a polypropylene resin, the resin layer is also preferably made of a polypropylene resin.

In the present invention, the synthetic resin plate is used in the longitudinal direction and / or in order to ensure basic performance for packing heavy film rolls and to ensure multiple use, preferably 10 or more reuse performance. The maximum lateral bending strength must be between 3 and 15 MPa. The upper limit of the number of times of use is preferably as many as possible, but is approximately 30 times.
The maximum bending strength of the synthetic resin plate can be adjusted by selecting the base resin of the synthetic resin plate. If the synthetic resin plate is a synthetic resin corrugated cardboard, the rib shape, thickness, and the synthetic resin surface constituting the corrugated cardboard The thickness of the material, the lamination thickness of the resin layer, and, when the synthetic resin plate is a synthetic resin foam plate, can be adjusted by the expansion ratio, the thickness, the cell diameter, the lamination thickness of the resin layer, and the like.

The base resin constituting the synthetic resin plate may be any resin as long as the object and effects of the present invention can be achieved, but polypropylene resin, polyethylene resin, polystyrene resin, and polyester resin are processed. From the viewpoint of properties and the like.
In particular, since it has excellent durability, mechanical strength, and processability, it is a propylene homopolymer, propylene copolymer, high density polyethylene, low density polyethylene, low density polyethylene and high density polyethylene, and / or linear low density polyethylene. Particularly preferred are polyolefin resins such as a mixture thereof. The propylene copolymer is a copolymer with other olefins copolymerizable with propylene. Examples of such olefins include ethylene, 1-butene, isobutylene, 1-pentene, and 3-methyl. Examples are olefins having 2 to 10 carbon atoms such as -1-butene, 1-hexene, 3,4-dimethyl-1-butene, and 3-methyl-1-hexene. Further, these copolymers may be random copolymers or block copolymers, and may be not only binary copolymers but also ternary copolymers. These polymers can be used alone or as a mixture of two or more.

Moreover, brittleness can be improved by mixing an elastomer with the base resin constituting the synthetic resin plate. Examples of the elastomer include styrene-butadiene-styrene block copolymer rubber, styrene-isoprene-styrene block copolymer rubber, hydrogenated styrene-butadiene-styrene block copolymer rubber, styrene-ethylene-propylene copolymer rubber, styrene- Styrene elastomers such as ethylene-propylene-styrene copolymer rubber, ethylene-propylene random copolymer rubber, ethylene-butylene block copolymer rubber, ethylene-octene random copolymer rubber, and other copolymer rubbers of ethylene and other olefins, etc. Olefin-based elastomers. Of these elastomers, olefin-based elastomers are preferable from the viewpoint of folding resistance and low-temperature impact resistance. The content of the elastomer is preferably 1 to 30% by weight.

In addition, inorganic fillers such as talc and silica, antioxidants, lubricants, ultraviolet inhibitors, flame retardants, antibacterial agents and the like can be added to the base resin constituting the synthetic resin plate.
In the case where the inner lid is made of a synthetic resin, the same base resin as that constituting the synthetic resin plate can be used.

The thickness of the synthetic resin plate constituting the box body is usually 2 to 10 mm, and considering the fold hinge characteristics, the mechanical strength of the box body, etc., 3 to 8 mm is preferable, and 3 to 6 mm is preferable. More preferred.
The basis weight of the synthetic resin plate, light weight, considering mechanical strength, preferably 400~2000g / ^{m 2,} more preferably ^{500~1800g / m 2, 700~1500g / m} 2 is more particularly preferred. In particular, when the synthetic resin plate is a foamed plate, the apparent density is usually 0.07 to 0.60 g / cm ³ , preferably 0.09 to 0.45 g / cm ³ .

The box body used in the present invention has an antistatic function in order to prevent adhesion of contaminants such as dust and dirt. Examples of a method for imparting an antistatic function include a method of applying an antistatic agent to a synthetic resin plate, a method of kneading an antistatic agent into a base resin constituting the synthetic resin plate, and the like. In addition, a method of laminating a resin layer containing an antistatic agent is particularly preferable because it can be expected to simultaneously improve the mechanical strength of the synthetic resin plate, and improve the hinge characteristics such as the crease resistance and foldability. In addition, since the folding return box of the present invention is assumed to be washed and reused, and it is not preferable to contaminate the packaged goods by bleed-out of the antistatic agent, the type of antistatic agent It is preferable to use a polymer type antistatic agent called a permanent antistatic agent. The polymer-type antistatic agent is preferably an ionomer resin containing an alkali metal selected from the group consisting of potassium, rubidium and cesium as a metal ion, a hydrophilic resin mainly composed of polyetheresteramide or polyether, and the like. Illustrated. The antistatic function means that the surface specific resistivity of the synthetic resin plate measured by JIS K6911 (1995) is 1.0 × 10 ¹³ (Ω / □) or less, preferably 1. It means to show a value of 0 × 10 ^{9 to} 8.0 × 10 ¹² (Ω / □). Specifically, the surface resistivity is determined by leaving a test piece cut out from a synthetic resin plate (length 100 mm, width 100 mm, thickness: thickness of the synthetic resin plate) in an atmosphere of 23 ° C. and 50% humidity for 24 hours. The value measured as the surface resistivity after one minute after voltage application is started under the condition of applied voltage of 500V using “TR8601 HIGH MEGOHM METER” manufactured by Takeda Riken Kogyo Co., Ltd. It is.

The folding type returnable box of the present invention has the above-described box body, an upper surface inner lid provided with a hole into which the film roll support member is inserted, and the film roll support member. And a bottom inner lid provided with a hole. It is preferable that the upper surface inner lid and the lower surface inner lid have the same shape in consideration of easy manufacture. However, it may have a different shape. Preferred examples of the upper surface inner lid and the lower surface inner lid are shown in FIGS.
4 and 5 are plan views of the upper surface inner lid (lower surface inner lid). In FIG. 3, 31 is an upper surface inner lid, 32 is a lower surface inner lid, and 33 is a hole provided in the central portion. Each is shown.

  Since the upper and lower inner lids have the function of fixing the film roll together with the support member, they have the same shape as the cross-section of the cylindrical body constituting the box body and are fitted to fit into the cylindrical body. A shape that can be formed is preferable. The upper and lower inner lids are preferably made of synthetic resin, more preferably the same synthetic resin plate as the box body described above, but they may be made of different materials.

  4 and 5, a hole 33 is provided in the center of the upper surface inner lid 31 (lower surface inner lid 32), and a film roll support member 35 (hereinafter also simply referred to as a support member) is provided in the hole 33. Further, the support member 35 is inserted into the hole of the core of the film roll. The shape of the support member 35 is not particularly limited as long as it can be inserted into the hole of the core of the film roll, but it is preferable that a collar portion 36 is provided as shown in FIG. The support member 35 provided with the collar portion 36 can easily fix the upper surface inner lid 31 (lower surface inner lid 32) to the film roll.

As shown in FIG. 4, the upper surface inner lid 31 (lower surface inner lid 32) is preferably provided with a notch 37, and as shown in FIG. 5, a hole 38 is provided. Is preferred. When the notch 37 and / or the hole 38 are provided, the upper surface inner lid 31 (lower surface inner lid 32) can be easily fitted when the film roll is stored in the box body, and the film roll When taking out from the box body, the upper surface inner lid 31 (lower surface inner lid 32) can be easily removed. In particular, when the hole 38 is provided, the inner lid can be stored with the hook on the hook, so that workability at the time of packing and unpacking can be improved.
When packing one film roll in the box body, it is preferable that a hole is provided in the center of the upper and lower inner lids as shown in FIGS. 4 and 5. When packing in the box body, it is necessary to adjust the positions of the holes provided in the upper and lower inner lids in consideration of storage efficiency, stability and safety.

  Next, an example of a method for packaging a film roll using the folding return box of the present invention will be described with reference to FIG. FIG. 7 is a longitudinal sectional view showing an example in which the film roll 40 is packaged by using the box body 3, the upper middle lid 31, the lower middle lid 32, the film roll support member 35, and the packaging bag 39.

The film roll 40 is covered with a packaging bag 39 made of polyethylene, and is protected from contaminants such as dust and dirt. The lower surface inner lid 32 is directed to the lower surface of the film roll 40 so that the center of the hole 33 in the lower surface inner lid substantially coincides with the center of the film roll 3, and from below the support member 35 is a hole in the lower surface inner lid. 33 and inserted into a hole 41 in the core of the film roll 40. Thus, the lower portion of the film roll 40 is fixed by the support member 35 and the lower surface inner lid 32, and the lower portion of the box body 3 is closed by closing the bottom plate 7.
The upper surface inner lid 31 is directed to the upper surface of the film roll 37 so that the center of the hole 33 of the upper surface inner lid substantially coincides with the center of the film roll 3, and from above the support member 35 is a hole of the upper inner lid. 33 and inserted into a hole 41 in the core of the film roll 40. Thus, the upper portion of the film roll 40 is fixed by the support member 35 and the upper surface inner lid 31, and the upper portion of the box body 3 is closed by closing the lid plate 6.

  According to the folding type returnable box of the present invention, as described above, it is possible to prevent the contaminants from adhering to the film roll, and further by using the upper surface inner lid, the lower surface inner lid, and the holding member firmly. Can be fixed. In addition, since the box body is made of a strong synthetic resin plate and is not easily damaged, it can be used as a returnable box multiple times.

It is a perspective view which shows an example of the box main body of this invention. It is an expansion | deployment top view which shows an example of a box main body. (A) It is the perspective view which looked at the holding | gripping tool from the inner side. (B) It is the perspective view which looked at the holding | gripping tool from the outer side. It is a top view which shows the preferable example of an upper surface inner cover (lower surface inner cover). It is a top view which shows the other preferable example of an upper surface inner cover (lower surface inner cover). It is a perspective view which shows a preferable example of a supporting member. It is a longitudinal cross-sectional view which shows an example in which the film roll was packaged with the folding type returnable box of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Box main body 2 Opening part 3 Cylindrical body 4 Side surface 4a, 4b, 4c, 4d Each side surface 5 Crease 6 Cover plate 6a, 6b, 6c, 6d Each cover plate 7 Bottom plate 7a, 7b, 7c, 7d Each bottom plate 8 Binding margin 9a, 9b Surface fastener 10 Surface fastener 10a, 10b, 10c, 10d Each surface fastener 11 Holding part 12 Mounting hole 13 Holding tool 13a Outer part of holding tool 13b Inner part of holding tool 14 Bending part 15a, 15b Fitting Matching portion 21 Label attaching portion 22 Non-slip material 31 Upper surface inner lid 32 Lower surface inner lid 33 Hole provided in center portion 35 Film roll support member 36 Brim portion 37 Notch portion 38 Hole portion 39 Packaging bag 40 Film roll 41 Film Roll core hole

Claims (5)

A rectangular tubular body having openings at the top and bottom and foldable into a plate shape;
A lid plate connected to the upper end of the side surface of the cylindrical body via a crease;
It consists of a bottom plate connected to the lower end of the side surface via a crease,
A foldable box body made of a synthetic resin plate having an antistatic function having a maximum bending strength of 3 to 15 MPa in the vertical and / or horizontal direction;
The inside of the box body is composed of an upper surface inner lid and a lower surface inner lid provided with a hole into which a film roll support member is inserted,
A grip portion having a structure in which the inside of the box body and the outside of the box body do not communicate with each other at a position shifted in the front-rear direction from the center line in a plan view is provided on the opposite side surfaces of the box body.
The cover plate and the bottom plate are provided with hook and loop fasteners. The folding roll-back box for film roll packaging according to claim 1, wherein a cutout portion and / or a hole portion are formed in the upper and lower inner lids. The folding rollover box for film roll packaging according to claim 1 or 2, wherein a label attaching portion having an uneven surface is provided on a side surface or a cover plate of the box body. The folding roll-through box for film roll packaging according to any one of claims 1 to 3, wherein an anti-slip material is provided on at least one of a side surface, a cover plate, and / or a bottom plate of the box body. The folding rollover box for film roll packaging according to any one of claims 1 to 4, wherein the synthetic resin plate is a polyolefin resin foam plate.

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