JP6938076B2 - Wrap film storage box - Google Patents

Description

The present invention relates to a wrap film storage box in which a wrap film is wound and stored.

Conventionally, in a carton in which a wrap film for wrapping foodstuffs, dishes, etc. is wound and stored, a carton in which a plurality of linear convex portions are provided on the bottom plate of the main body has been known (see, for example, Patent Document 1). According to this carton, by reducing the contact area between the wrap film and the bottom surface of the main body to reduce the frictional resistance, it is possible to prevent the wrap film from adhering to the bottom surface of the main body and prevent pull-out failure due to poor rotation. ..

Japanese Unexamined Patent Publication No. 2004-168379

By the way, in the above-mentioned carton, since a gap is formed between the inner wall and the wrap film winding body, the wrap film winding body may move and collide with the inner wall during transportation or the like, and the wrap film may be damaged. there were.
In particular, when the edge of the wrap film is scratched, there is a problem that the wrap film is torn from the edge when the wrap film is pulled out, and the wrap film cannot be pulled out.

An object of the present invention is to provide a wrap film storage box in which the contained wrap film is not easily damaged.

That is, the wrap film storage box of the present invention
A main body having an opening, a bottom plate, a front plate, a rear surface plate, and a pair of side plates, and accommodating a wound wrap film, and a lid rotatably connected to one side edge of the rear surface plate. A wrap film storage box having a part
At least one of the bottom plate, the front plate, the rear surface plate, or the lid plate constituting the top surface of the lid portion is a step protruding toward the inner surface side in contact with the wrap film when the wrap film is housed. The parts are provided on the rear side and the front side of the wrap film storage box.
The step portion is located at a position that does not overlap with the position of the axial end portion of the wound wrap film, and is the inner surface or the side of the side plate in the axial direction of the wound wrap film. It has a maximum height position at a position of 5 mm or more and 80 mm or less from the inner surface of the auxiliary side plate arranged on the inner surface side of the face plate.
Moreover, the maximum height of the step portion located on the front side is farther from the inner surface of the side plate or the inner surface of the auxiliary side plate than the step portion located on the rear side. It is characterized by having.

This makes it possible to provide a wrap film storage box in which the stored wrap film is not easily damaged. That is, it is possible to prevent the end portion of the wrap roll from coming into contact with the inner surface or the stepped portion of the wrap film storage box, rubbing and tearing. Therefore, it is possible to prevent the wrap film from becoming unable to be pulled out. In addition, the area where the wrap roll comes into direct contact with the inner surface of the wrap film storage box can be reduced. Further, the end portion of the wrap roll can be prevented from contacting the step portion.

Further, the wrap film storage box of the present invention is
The step portion is provided on the inner surface side of two or more of the bottom plate, the front plate, the rear surface plate, or the lid plate.
The position of each step portion is characterized in that it is located at substantially the same position in the axial direction of the wound wrap film.
As a result, it is possible to provide a step at an appropriate position on a plurality of surfaces, and it is possible to effectively prevent scratches on the end portion of the lap roll.

Further, the wrap film storage box of the present invention is
The step portion is formed by embossing.
By forming the stepped portion by embossing in this way, it is possible to prevent the stepped portion from being displaced or peeled off. In the manufacturing process of the wrap film storage box, the step of attaching the step portion can be omitted, and the number of parts can be reduced.

Further, the wrap film storage box of the present invention is
The stepped portion has a shape that gradually increases as the distance from one of the side plate sides increases.
As a result, in the manufacturing process of the wrap film storage box, the wrap roll can be easily inserted into the main body portion without damaging the end portion of the wrap roll.

Further, the wrap film storage box of the present invention is
The maximum height of the stepped portion is 0.05 mm or more and 0.50 mm or less.
As a result, it is possible to secure an appropriate step in which the wrap roll does not come into direct contact with the inner surface of the main body or the lid, and the wrap roll can be accommodated in the main body without damaging the end portion of the wrap roll during insertion. In addition, it is possible to prevent the end portion of the wrap roll from being damaged by vibration during transportation.

Further, the wrap film storage box of the present invention is
The wrap film is characterized by using a polyvinylidene chloride-based resin as a raw material.
This makes it possible to prevent damage to the wrap film made of a polyvinylidene chloride-based resin whose edges are easily torn.

According to the present invention, it is possible to provide a wrap film storage box in which the contained wrap film is not easily damaged.

It is a perspective view which looked at the wrap film storage box of embodiment from above. It is a perspective view which looked at the state which removed the wrap roll from the wrap film storage box of embodiment, as viewed from above. It is a schematic cross-sectional view which shows the maximum height of the step part formed on the inner surface of the wrap film accommodating box of embodiment. It is a figure which shows the position of the wrap roll housed in the wrap film storage box of embodiment. It is a graph which shows the result of the comparative experiment about the degree of damage of the wrap film during transportation performed using the wrap film storage box of an embodiment. It is a graph which shows the result of the comparative experiment about the degree of damage of the wrap film during transportation performed using the wrap film storage box of an embodiment.

Hereinafter, the wrap film storage box according to the embodiment of the present invention will be described with reference to the drawings. In addition, in this specification, "upper" or "lower" is defined in the state of FIG. That is, the lid portion 20 is located above the main body portion 10.

(Wrap film storage box 2)
FIG. 1 is a perspective view showing the wrap film storage box 2. As shown in FIG. 1, the wrap film storage box 2 includes a main body portion 10 that houses the wrap roll 91r, and a lid portion 20 that is rotatably connected to the main body portion 10.

(Main body 10)
The main body 10 is a rectangular parallelepiped box containing a wrap roll 91r, and is formed by processing a paperboard such as coated cardboard or Kent paper having a thickness of about 0.2 mm to 1.3 mm, for example.

Further, the main body 10 includes a front plate 12, a bottom plate 13, a rear plate 14, and a pair of side plates forming the end faces of the rectangular parallelepiped, together with the opening 10h defined in the upper portion. Has 15. Inside the side plate 15, a front auxiliary side plate (not shown) extending from the front plate 12 and a rear auxiliary side plate 16B extending from the rear plate 14 are arranged and adhered to the side plate 15, respectively.

Although the rear auxiliary side plate 16B is arranged on the inner surface side of the front auxiliary side plate (the side in which the lap roll 91r is housed in the main body 10 and in contact with the lap roll 91r when the lid 20 is closed). , The front auxiliary side plate may be arranged on the inner surface side of the rear auxiliary side plate 16B. In the following description, when the front auxiliary side plate or the rear auxiliary side plate 16B arranged on the inner surface side of the side plate 15 is generically referred to, it is referred to as an auxiliary side plate 16.
The bottom plate 13 faces the opening 10h, and the front plate 12 and the rear plate 14 are orthogonal to the opening 10h and the bottom plate 13.

Further, a reinforcing plate (not shown) for reinforcing the front plate 12 is arranged on the inner surface of the front plate 12. The reinforcing plate is folded back at an end edge intersecting with the opening 10h of the front plate 12, and extends downward along the inner surface of the front plate 12. Further, the reinforcing plate is connected to a fixing piece 17 that prevents the lap roll 91r from jumping out by contacting the lap roll 91r from above.

(Cover 20)
The lid portion 20 is a member that opens and closes the opening 10h, which is rotatably connected to the main body portion 10 with the upper edge 18 (one side edge) of the rear surface plate 14 of the main body portion 10 as a rotation axis. The lid portion 20 is formed by processing a paperboard such as coated cardboard or Kent paper having a thickness of, for example, about 0.2 mm to 1.3 mm, similarly to the main body portion 10, and is formed by processing a paperboard such as a coated cardboard or Kent paper. It has 22, a cutting blade 23, and a pair of lid side plates 25 forming an end surface of the lid portion 20. The cutting blade 23 is provided in a V shape along the lid front plate 22 so that the cutting edge protrudes from the tip portion 22t of the lid front plate 22.

(Wrap roll 91r)
The wrap roll 91r is a long thin film wrap film 91f wound around a cylindrical winding core 91a in a roll shape. The wrap film 91f is, for example, a film formed from a polyvinylidene chloride-based resin and having a thickness of 5 to 20 μm.

(Step 30)
FIG. 2 is a perspective view of the wrap film storage box 2 in a state where the wrap roll 91r is removed from the main body 10 as viewed from above. As shown in FIG. 2, a step portion 30 is provided on at least one of the inner surface of the front plate 12, the inner surface of the bottom plate 13, the inner surface of the rear plate 14, or the inner surface of the lid upper plate 21. Here, the inner surface means a surface that comes into contact with the wrap roll 91r when the wrap roll 91r is housed in the wrap film storage box 2. In FIG. 2, the portion of the step portion 30 that cannot be directly visually recognized is indicated by a broken line. By providing the stepped portion 30 on the inner surface of the main body portion 10 and the lid portion 20 in this way, the end portion of the wrap roll 91r comes into direct contact with the inner wall of the wrap film accommodating box 2 during transportation of the wrap film accommodating box 2. It is possible to prevent the end portion of the wrap roll 91r from being scratched.

The stepped portion 30 is formed so as to protrude toward the inner surface side of the wrap film storage box 2 by embossing. By projecting the stepped portion 30 toward the inner surface side in this way, the area in which the wrap roll 91r directly contacts the inner surface of the main body portion 10 can be reduced. Further, the step portion 30 may be embossed so that the inner surface side of the wrap film storage box 2 is depressed to form a step. Further, the stepped portion 30 may be formed by combining a convex embossing protruding toward the inner surface side and a concave embossing with the inner surface side depressed on the same surface (plate). It is more effective to use a combination of convex embossing and concave embossing for the stepped portion 30 because the height of the stepped portion can be secured. Further, the convex embossing and the concave embossing may be combined by forming a convex embossing on one surface (plate) and forming a concave embossing on the other surface (plate).

As described above, by forming the stepped portion 30 by embossing, it is possible to prevent the stepped portion 30 from being displaced or peeled off as in the case where the stepped portion 30 is formed by pasting thick paper.

The maximum height of the stepped portion 30 is preferably 0.05 mm or more and 0.50 mm or less, and more preferably 0.15 mm or more and 0.35 mm or less. As a result, it is possible to secure an appropriate step in which the wrap roll 91r does not come into direct contact with the inner surface of the main body portion 10 or the lid portion 20. Further, in the manufacturing of the wrap film storage box 2, when the wrap roll 91r is inserted from the side surface side, the end portion of the wrap roll 91r can be made hard to be damaged. Further, when the wrap film storage box 2 is transported, the end portion of the wrap roll 91r can be prevented from being damaged by vibration. Further, it is possible to easily form the stepped portion 30 with the paperboard.

Here, the maximum height of the step portion 30 is the inner surface surface in contact with the wrap roll 91r housed in the wrap film storage box 2 in the projecting direction of the step portion 30 as shown in FIGS. 3A and 3B. It refers to the height T to the position farthest from 32 (inner surface of the front plate 12, the inner surface of the bottom plate 13, the inner surface of the rear surface plate 14, or the inner surface of the lid upper surface plate 21).

Thereby, when the wrap roll 91r is housed in the main body 10 without reducing the diameter of the wrap roll 91r, the wrap roll 91r can be prevented from directly contacting the inner surface of the main body 10 and the lid 20. ..

Further, the step portion 30 is provided at a position that does not overlap with the position of the end portion of the lap roll 91r in the axial direction 50 (see FIGS. 1 and 2) of the lap roll 91r. Specifically, as shown in FIGS. 3 and 4, the distance A from the inner surface of the auxiliary side plate 16 to the position of the maximum height of the step portion 30 is provided at a position where the distance A is 5 mm or more and 80 mm or less.

Here, the wrap film storage box 2 is usually stored and transported in a cardboard box on the left side when the front plate 12 is viewed from the front, that is, with the B direction shown in FIG. 4 facing the sky. In this case, since the axial length of the winding core 91a is shorter than the axial length of the wrap film storage box 2, a gap 10j is formed at the end of the wrap film storage box 2 in the sky direction. .. Here, the width C of the gap 10j is about 3 mm, and the length D of the exposed portion of the winding core 91a is about 1 to 6 mm. Therefore, the step portion 30 is provided at an appropriate position within a range in which the maximum height of the step portion 30 (height T shown in FIG. 3) is 5 mm or more and 80 mm or less from the inner surface of the auxiliary side plate 16. In the axial direction 50 of 91r, the position of the end portion of the lap roll 91r does not overlap with the position of the step portion 30. As a result, it is possible to prevent the end portion of the wrap roll 91r from coming into contact with the stepped portion 30 and being rubbed and torn.

Further, as shown in FIG. 2, the stepped portions 30 provided on the inner surface of the front plate 12, the inner surface of the bottom plate 13, the inner surface of the rear surface plate 14, or the inner surface of the lid upper plate 21 are two or more. The lap rolls 91r are arranged so as to be aligned at substantially the same position in the axial direction 50. As a result, when the lap roll 91r is shaken due to vibration during transportation or the like, the lap roll 91r comes into contact with a plurality of stepped portions 30 arranged at substantially the same position, so that the end portion of the lap roll 91r It is possible to prevent the occurrence of scratches more effectively.

Further, the length of the stepped portion 30 in the width direction of the wrap roll 91r is preferably 3 mm or more from the viewpoint of stably forming the stepped portion. Further, due to the relationship between the diameter of the wrap roll 91r and the inner dimensions of the wrap film storage box 2, the stepped portion 30 is formed over a range in which the wrap roll 91r can come into contact when moving in the wrap film storage box 2. Is preferable. Specifically, the length of the stepped portion 30 in the width direction of the lap roll 91r is more preferably 3 mm or more and 15 mm or less.

Further, if the length of the stepped portion 30 in the axial direction 50 of the lap roll 91r is 1 mm or more, it sufficiently functions. However, considering the stability of the step formation and the scratch resistance of the lap roll 91r, it is more effective to increase the contact surface with the lap roll 91r, so that the length of the step portion 30 in the axial direction 50 of the lap roll 91r is long. The longer the width, the better.

According to the wrap film storage box 2 according to this embodiment, the end of the wrap roll 91r is provided by providing the step portion 30 at a position that does not overlap with the position of the end portion of the wrap roll 91r in the axial direction 50 of the wrap roll 91r. It is possible to prevent the portion from being rubbed and torn by the stepped portion 30. As a result, the wrap film 91f can be reliably pulled out. Further, by providing the stepped portion 30, the lap roll 91r does not come into direct contact with the inner surface of the main body portion 10 or the lid portion 20 during transportation, so that it is possible to prevent the wrap roll 91r from being damaged during transportation. ..

In the above-described embodiment, the stepped portion 30 does not necessarily have to be formed by embossing as long as the stepped portion is formed on the inner surface side of the wrap film storage box 2. For example, the step portion 30 may be formed by sticking thick paper or the like on the inner surface side of the wrap film storage box 2. If the stepped portion 30 is formed, the end portion of the wrap roll 91r does not come into direct contact with the inner surface of the main body portion 10 or the lid portion 20, so that the end portion of the wrap roll 91r can be prevented from being damaged. ..

Further, in the above-described embodiment, a case where the stepped portion 30 is provided on all of the inner surface of the front plate 12, the inner surface of the bottom plate 13, the inner surface of the rear plate 14, and the inner surface of the lid upper plate 21 is taken as an example. As described above, the stepped portion 30 may be provided on any one or more of these inner surfaces. However, the stepped portion 30 is preferably provided on two or more surfaces, and more preferably provided on three or four surfaces.

If the stepped portion 30 is provided on two or more surfaces, the surface of the lap roll 91r that comes into direct contact with the inner surface of the main body portion 10 or the lid portion 20 can be reduced, so that the end portion of the lap roll 91r is damaged. It can be prevented more effectively.

Further, in the above-described embodiment, as shown in FIG. 3A, the stepped portion 30 may have a shape that gradually increases as the distance from the inner surface side of either side plate 15 increases. In particular, it is preferable to provide the stepped portion 30 on the inner surface of the bottom plate 13. In the process of manufacturing the wrap film storage box 2, the wrap roll 91r wound around the winding core 91a is inserted into the main body 10 in the axial direction 50. Therefore, the wrap roll 91r can be easily inserted into the main body 10 by forming the stepped portion 30 on the insertion side of the wrap roll 91r so as to gradually increase as the distance from the inner surface side of the side plate 15 increases. Further, it is possible to prevent the end portion of the lap roll 91r from being damaged by the stepped portion 30 during insertion. In this case, it is preferable that the maximum height of the step portion 30 is 0.05 mm or more and 0.50 mm or less, and more preferably 0.15 mm or more and 0.35 mm or less.

Further, in the above-described embodiment, the front auxiliary side plate and the rear auxiliary side plate 16B may not be arranged on the inner surface side of the side plate 15. In this case, the step portion 30 may be provided at an appropriate position within a range in which the maximum height position of the step portion 30 is 5 mm or more and 80 mm or less from the inner surface of the side plate 15.

Further, in the above-described embodiment, the step portion 30 may be provided on the reinforcing plate (not shown) that reinforces the front plate 12.
Further, in the above-described embodiment, the wrap film storage box 2 may be made of a material other than paperboard, such as synthetic resin.

Further, in the above-described embodiment, the cutting blade 23 may have a linear shape or may have another shape.
Further, in the above-described embodiment, the stepped portion 30 may be formed on both sides or either side in the axial direction 50 of the lap roll 91r. When the step portion 30 is formed on either side, if the step portion 30 is formed on the side in the sky direction where the vibration during transportation is severe, the end portion of the wrap roll 91r in the sky direction is the inner surface of the wrap film storage box 2. Alternatively, it is possible to prevent the step portion 30 from coming into contact with the step portion 30 and being rubbed and torn.

Further, the step portion 30 may be formed at the central portion in addition to the end portion in the axial direction 50 of the lap roll 91r. In this case, if the position of the maximum height of the step portion 30 in the axial direction 50 is at a predetermined position, the end portion of the wrap roll 91r comes into contact with the inner surface of the wrap film storage box 2 or the step portion 30 and rubs and tears. Can be prevented. Therefore, it is possible to prevent the wrap film 91f from being unable to be pulled out.

Next, an example of an experiment conducted using the wrap film storage box 2 according to the embodiment will be described. In the experiment, a conventional wrap film storage box having no stepped portion 30 and a wrap film storage box 2 according to the embodiment were prepared and transported in a box, and then scratches formed on the wrap film 91f on the wrap roll 91r. (Hereinafter referred to as scratches in the examples) and the portion of the wrap film 91f in the wrap roll 91r that is damaged due to breakage, tearing, or abrasion (hereinafter referred to as shaving in the examples). We confirmed the number of. In the embodiment, "vertical" means the axial direction 50 of the lap roll 91r, and vertical scratches and vertical shavings mean scratches and shavings extending in the axial direction, respectively. Similarly, "horizontal" means the radial direction of the lap roll 91r, and lateral scratches and lateral shavings refer to scratches and shavings extending in the circumferential direction, respectively.

Further, as the wrap film storage box 2 used in the experiment, a storage box having an internal dimension of the main body 10 having a height of 43.5 mm, a width of 42.5 mm, and a length of 312 mm was prepared. Further, a polyvinylidene chloride wrap film 91f was wound around a winding core 91a having an axial length of 308 mm on a wrap roll 91r housed in the main body 10 (Kureha NEW Kureha Corporation (registered trademark) 30 cm × 50m) I prepared something. At this time, the exposed portion of the winding core 91a was 5 mm.

Here, the step portion 30 is provided at the following position. That is, on the rear side of the wrap film storage box 2 (the side facing the ground during transportation), the bottom plate 13 and the rear surface plate 14 are located 9 mm from the inner surface of the auxiliary side plate 16, and the lid top plate 21 is the lid side plate 25. A step portion 30 is provided at a position 9 mm from the inner surface of the above. Further, on the front side of the wrap film storage box 2 (the side facing the sky during transportation), the bottom plate 13 and the rear surface plate 14 are located 12 mm from the inner surface of the auxiliary side plate 16, and the lid top plate 21 is the lid side plate 25. A step portion 30 is provided at a position 12 mm from the inner surface. These stepped portions 30 have a length of 6 mm in the width direction of the wrap roll 91r and a length of 5 mm in the axial direction 50 of the wrap roll 91r, and are formed by embossing so as to project toward the inner surface side of the wrap film storage box 2. There is.

The stepped portion 30 of the bottom plate 13 is embossed so as to form a gently descending slope toward the lap roll 91r insertion side. Further, the stepped portion 30 formed on the rear surface plate 14 and the lid upper surface plate 21 of the storage box 2 is embossed so that the height becomes constant. Here, the maximum height of each step portion 30 is 0.15 mm, which is 9 mm from the inner surface of the auxiliary side plate 16 on the rear side and 12 mm from the inner surface of the auxiliary side plate 16 on the front side. The step portion 30 is formed so that the position of the maximum height is located. At this time, the positions of the stepped portions 30 provided on the respective surfaces are substantially the same in the axial direction 50 of the lap roll 91r.

[First Example]
The experiment according to the first embodiment was carried out using the wrap film storage box 2 in which the stepped portion 30 was provided on three surfaces of the inner surface of the bottom plate 13, the inner surface of the rear surface plate 14, and the inner surface of the lid upper plate 21. ..
The graph shown in FIG. 5 is a graph showing the experimental results of the first embodiment. In this graph, "the present invention" refers to the wrap film storage box 2 according to the present invention, and "conventional" refers to the conventional wrap film storage box. In the experiment, both the "invention" and the "conventional" were transported with the front side facing the sky. At this time, a gap of about 3 mm was formed at the end of the wrap film storage box 2 in the sky direction. As a result, the lap roll 91r comes into contact with the stepped portion 30 at a position 4 mm closer to the center in the axial direction from the end portion.

Further, in the case of "the present invention (reverse)", the wrap film storage box 2 was transported in the opposite direction. That is, the rear side was directed toward the sky and the front side was directed toward the ground. As a result, the lap roll 91r comes into contact with the stepped portion 30 at a position 1 mm closer to the center in the axial direction from the end portion.

According to the graph shown in FIG. 5, the number of vertical scratches and horizontal scratches in the "present invention" is smaller than that in the "conventional". In particular, the lateral scratches on the front side, which shake greatly during transportation, are greatly reduced compared to the "conventional". Further, the "invention (reverse)" also has less scratches and shavings than the "conventional", and by providing the stepped portion 30, the lap roll 91r is prevented from being damaged.

[Second Example]
In the second embodiment, the stepped portion 30 is provided on only two surfaces, the inner surface of the bottom plate 13 and the inner surface of the rear surface plate 14, that is, the stepped portion 30 is provided on the inner surface of the lid upper surface plate 21. An experiment was carried out under the same conditions as in the first example, using no "invention (revised)". The graph shown in FIG. 6 is a graph showing the experimental results of the second embodiment.

According to this, even in the "invention (revised)" in which the stepped portion 30 is eliminated from the inner surface of the lid upper surface plate 21, scratches are reduced as compared with the "conventional". However, it is possible to reduce scratches on the end portion of the lap roll 91r by providing the stepped portions 30 on as many surfaces as possible on the four surfaces with which the lap roll 91r can come into contact.

According to the present invention, it is possible to provide a wrap film storage box in which the wrap film is not easily damaged.

2 Wrap film storage box 10 Main body 10h Opening 10j Gap 12 Front plate 13 Bottom plate 14 Rear plate 15 Side plate 16 Auxiliary side plate 16B Rear auxiliary side plate 17 Fixed piece 18 Upper edge 20 Lid 21 Lid Top plate 22 Front Face plate 22t Tip part 23 Cutting blade 25 Cover side plate 30 Step part 91a Winding core 91f Wrap film 91r Wrap roll

Claims (6)

A main body having an opening, a bottom plate, a front plate, a rear surface plate, and a pair of side plates, and accommodating a wound wrap film, and a lid rotatably connected to one side edge of the rear surface plate. A wrap film storage box having a part
At least one of the bottom plate, the front plate, the rear surface plate, or the lid plate constituting the top surface of the lid portion is a step protruding toward the inner surface side in contact with the wrap film when the wrap film is housed. The parts are provided on the rear side and the front side of the wrap film storage box.
The step portion is located at a position that does not overlap with the position of the axial end portion of the wound wrap film, and is the inner surface or the side of the side plate in the axial direction of the wound wrap film. It has a maximum height position at a position of 5 mm or more and 80 mm or less from the inner surface of the auxiliary side plate arranged on the inner surface side of the face plate.
Moreover, the maximum height of the step portion located on the front side is farther from the inner surface of the side plate or the inner surface of the auxiliary side plate than the step portion located on the rear side. A wrap film storage box characterized by having. The step portion is provided on the inner surface side of two or more of the bottom plate, the front plate, the rear surface plate, or the lid plate.
The wrap film storage box according to claim 1 , wherein the positions of the stepped portions are substantially the same in the axial direction of the wound wrap film. The wrap film storage box according to claim 1 or 2 , wherein the step portion is formed by embossing. The wrap film storage box according to any one of claims 1 to 3 , wherein the stepped portion has a shape that gradually increases as the distance from one of the side plate sides increases. The wrap film storage box according to any one of claims 1 to 4 , wherein the maximum height of the step portion is 0.05 mm or more and 0.50 mm or less. The wrap film storage box according to any one of claims 1 to 5 , wherein the wrap film is made of a polyvinylidene chloride resin as a raw material.

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