JPH05330549A - Wrapping film container - Google Patents

Abstract

PURPOSE:To make the cut edge of a film straight and prevent a failure in positioning the mounting location by a method wherein a virtual line that connects the points of sawtooth-shaped teeth which protrude outside along the edge of a cover flap is nearly horizontally straight except for the middle part where the teeth have a height not more than two times the height of the teeth at the other parts. CONSTITUTION:Sawtooth-shaped teeth 7 protrude outside along the front edge of a cover flap 5. A virtual line X-X which connects the points of the teeth 7 is almost horizontally straight except for the lengthwise middle part where the height of the teeth is a little higher than that at the other parts. The higher the height of the teeth arranged in the middle part, the more advantageous in a middle part cutting method, however, that results in lack of the durability of the teeth and involves apparent danger and such a default that the line of the cut edge of a film F is not straight. Therefore, the height of line teeth at the middle part is designed within a range from one to two times the height of the teeth at the other parts (in case of one time, the pitch of the teeth is increased). The protrusion measure of the teeth is defined as a distance between the virtual line X-X and the points of the teeth at the middle part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates mainly to improvement of a cutting tool for a wrap film storage box which is widely used in general households, restaurants and the like, and is particularly applied to diversification of cutting methods.

[0002]

2. Description of the Related Art As shown in FIGS. 5A and 5B, when the opening piece 6 is removed, the front plate 1, the bottom plate 2, the rear plate 3, the cover plate 4, the side plate 8 and the cover plate 4 are removed from the front plate 1. A rectangular box body having a cover lid piece 5 extending in the covering direction as a main part is formed in a state in which a saw-tooth-shaped tooth crest 7 is exposed along the tip edge of the cover lid piece 5 which is substantially horizontal and straight. The storage box for the wrap film to be processed is, for example, No. 2 and No. 3 of Japanese Utility Model Laid-Open No. 59-28022.
It is known as disclosed in the drawings and FIGS. 1 and 3 of Japanese Utility Model Publication No. Sho 61-22823. Further, this type of storage box is, for example, a trademark name: Ssran Wrap [Dow Chemical Co., Ltd.
Is manufactured by the United States and is well known. The characteristic feature of this storage box is that a metal saw blade is attached to the back surface of the tip of the covering lid piece 5 having a substantially horizontal straight shape so that a tooth edge 9 of a saw blade protrudes along the tip edge. When the film is used as a wound film storage box, one end of the required film length pulled out is held between the front plate 1 and the cover lid piece 5, and the film comes into contact with the tooth tips and bends at an acute angle. The other end of the film by hand, guide the film and box diagonally up and down to oppose each other, and press the film from one end of the film to the other end of the film one by one. Can bite into a sharp tooth tip and reliably cut from one end to the other end (this cutting method will be referred to as a conventional cutting method hereinafter), and is widely used and popular with consumers along with the cutting method. ing.

On the other hand, Japanese Patent Publication No. 4-19092 discloses a box of the same type. However, the content of the proposal of this Japanese Patent Publication is such that a virtual line connecting the tooth tips of the saw tooth teeth exposed from the leading edge forms a V-shaped, U-shaped and trapezoidal cutting tool (made of metal. A saw blade) is attached to the tip of the cover lid piece 5 of the box. The storage box with a cutting tool of this proposal is such that the tip of the cutting tool is tensioned and guided in a state where the tooth tips of the cutting tool are in contact with the film surface at a right angle, and the central portion of the film held horizontally is cut by the cutting tool. A different cutting method (hereinafter referred to as central cutting method), which is impossible with conventional products, that the film cuts from the central part toward both ends when the box is rotated in the direction that the tooth tips in the central part penetrate There is a feature that makes it possible. This central cutting method has attracted attention because it has an advantage that the cut film is less likely to have a wrinkle as compared with the conventional cutting method.

[0004]

However, the above-mentioned Japanese Patent Publication proposes that the overall shape of the cutting tool is V-shaped and U-shaped.
Since it has either a letter shape or a trapezoidal shape, the directionality of the teeth is more diversified than the straight shape, so it is difficult to align the cutting tool during manufacturing and mounting, and therefore there are many defective cutting tool mounting positions. The problem that occurs, the problem that the cutting edge of the one end of the film in the conventional cutting method is poor due to the fact that both sides of the cutting tool are lowered, resulting in a decrease in sharpness in the conventional cutting method, and the cutting of the film There is a problem that the shapes of the ends are curved and are not aligned in a straight line. Therefore, the purpose of the invention is
The mounting position of the cutting tool can return the generation of defective products to the original state, and both the conventional cutting method and the central cutting method can be adopted with sharpness that is comparable to the cutting tool.
It is an object of the present invention to provide a wrapping film storage box with a cutting tool that satisfies all requirements that the cut edges of the film are aligned in a straight line.

[0005]

The object of the present invention is to employ the present invention, that is, when the opening piece 6 is removed, the front plate 1, the bottom plate 2, the rear plate 3, the lid plate 4, the side plate 8 are provided. And a rectangular box body having as a main part a cover lid piece 5 extending from the cover plate 4 in a direction to cover the front plate 1, is a saw blade shape along the leading edge of the cover lid piece 5 which is substantially horizontal and straight. In the storage box of the wrap film that will be formed with the tooth flank 9 of
The first aspect of the present invention is that "a virtual line connecting the tooth tips of the saw-toothed tooth peaks exposed along the tip edge of the covering lid piece 5 is such that the tooth peak at the longitudinal central portion is at the height of the tooth peaks at other portions. The second invention is "a saw blade shape that is exposed along the leading edge of the cover lid piece 5 described above. An imaginary line connecting the tips of tooth flanks is a shape that is drawn as a substantially horizontal straight line over the entire length, and the tooth flanks located at the central portion in the longitudinal direction are as wide as 2.5 times or less the pitch of the tooth lobes of other portions. According to the third aspect of the invention, "the virtual line connecting the tooth tips of the saw-toothed tooth peaks exposed along the tip edge of the covering lid piece 5 has The protrusion is at a height less than twice the height of the tooth crest of the other part, but the other part has a shape drawn by a substantially horizontal straight line, and the protruding crest is a tooth of the other part. Storage box and can be easily solved by adopting each of 2.5 times or less of wide are pitch with arranged "treatment of the wrap film of the pitch.

The greatest feature of the present invention is that while adopting a saw blade cutting tool having a straight shape as the cutting tool,
It succeeded in enabling "a central cutting method that was previously considered impossible to achieve with a straight saw blade". Therefore, the advantage that the straight saw blade cutting tool has in the past can be inherited as it is. The contents of the present invention will be described below with reference to the drawings.

1 to 4 are enlarged schematic plan views of a cutting tool used in the storage box of the present invention, FIG. 5 is a perspective conceptual view of the wrap film storage box of the present invention, and A) shows an opening piece 6. FIG. 6B is a diagram showing a state in which the box is completely opened by removing the unsealing piece 6 in the stage in which the box is to be opened by cutting and removing.
In FIG. 5A) B), the storage box of the present invention removes the unsealing piece 6 by cutting off the unsealing piece 6 with the cutting line 10 while peeling off the local joint portion 9 bonding the front surface of the front plate 1 and the back surface of the unsealing piece 6. Then the box is opened. At that time, front plate 1, bottom plate 2, rear plate 3,
A rectangular box body having a lid plate 4, a side plate 8 and a covering lid piece 5 extending from the lid plate 4 in a direction covering the front plate 1 as a main part is
The sawtooth-shaped tooth crests 7 are formed along the leading edge of the covering lid piece 5 which is substantially horizontal and straight.
In the case of FIG. 5, the side cover lid piece 11 and the fixing portion 12 of the cutting tool are described, and the film F is drawn slightly from the wound film R housed in the box. This description part is common to the conventional product, and there is no particular description. However, also in the present invention, the cutting tool is used as the covering piece 5.
Arranging the saw-tooth-like tooth flanks 9 to be exposed along the leading edge of the is an important requirement for enabling the "central cutting method". In the present invention, the shape of the saw blade adopted here is important, and the contents are enlarged and illustrated in FIGS. 1 to 4.

FIGS. 1 and 2 show an example of the shape of a cutting tool according to the first aspect of the present invention, in which the tooth tips of the saw-toothed tooth crests 7 to be exposed along the tip edge of the covering lid piece 5 are shown. Virtual line connecting XX
Shows that the tooth crests at the longitudinal central portion project slightly higher than the heights of the crests of other portions, but the other portions have a shape drawn by a substantially horizontal straight line. The difference between FIG. 1 and FIG. 2 is that the virtual line X-X connecting the tooth tips of the tooth crests protruding at the central longitudinal portion is the difference between FIG. 1 in which it is horizontal and FIG. 2 in which it is curved. Shows. FIG. 3 exemplifies the shape of a cutting tool of the second invention of the present invention, and an imaginary line X-X connecting the tooth tips of the serrated tooth crests 7 to be exposed along the tip edge of the covering piece 5. Shows that the entire length is drawn by a substantially horizontal straight line, but it shows that the tooth crests located at the central longitudinal part are arranged with a pitch slightly wider than the pitch of the crests of other parts. There is. 4 shows an example of the shape of the cutting tool of the third invention of the present invention, which is an imaginary line X- connecting the tooth tips of the serrated tooth crests 7 to be exposed along the tip edge of the covering piece 5. In X, the tooth crest at the longitudinal central portion is slightly higher than the height of the tooth crest of the other portion, but the other portion is a shape drawn by a substantially horizontal straight line, and the protruding tooth crest is It is shown that they are arranged with a pitch that is slightly wider than the pitch of the tooth crests of the part. The technical idea common to the first invention (FIG. 1) to the third invention (FIG. 4) is that even if there is a protruding tooth peak in the longitudinal center,
Since the height of the protrusion and the portion of the protrusion are slight and only local, the shape of the saw blade cutting tool as a whole is
It can be said that it is equivalent to a horizontal straight saw blade cutting tool,
Even when the cutting tool is manufactured and attached, it is possible to easily obtain it with the same high accuracy as a conventional horizontal straight saw blade. Nevertheless, both of them have the common effect that both the conventional cutting method and the central cutting method can be adopted with comparable sharpness.

The term "longitudinal central portion" as used herein refers to a dimension occupied by the longitudinal central portion of the cutting tool, which is usually in the range of 20 mm to 0.5 mm. The reason for this is that the longer the local dimension, the more difficult the central cutting method becomes, and the height of the tooth peak adopted in the present invention is limited to 20 mm. On the contrary, the direction of shortening the local dimension is advantageous for stress concentration when performing the central cutting method, but there is a problem of the durability of the tooth crests to withstand the stress and the risk of the tooth crests being apparent. The problem will come. Therefore, the minimum local size that can be adopted in the present invention is because the limit is 0.5 mm. In order to solve and harmonize with the above-mentioned problems, the size occupied by the central portion in the longitudinal direction is preferably in the range of 15 mm to 2 mm, and most preferably in the range of the longitudinal size occupied by 5 to 2 teeth. Next, the higher the height of the protrusion of the tooth crest located in the central region, the more advantageous it is to perform the central cutting method, but on the other hand, the problem of lack of durability of the tooth crest and the risk of the tooth crest are large. There are problems that become apparent and problems that the cut edges of the film are not aligned in a straight line. On the contrary, the central cutting method is not possible with the same horizontal straight type as the conventional one. Therefore, the height of the protrusion of the tooth crest which can be adopted in the present invention is usually in the range of 1 time (however, in this case, the pitch is widened) to 2 times the height of the tooth crest in other portions. However, from the viewpoint of facilitating the central cutting method and mitigating the risk of the tooth crests, and further, the height of the tooth crest projections from the viewpoint of aligning the cut ends of the film in a straight line, it is desirable that the tooth crests of other parts be The height is 1.1 to 1.7 times, and most preferably 1.2 to 1.5 times (projection size is 0.2 to 0.6 mm). The pitch of the tooth crests arranged in the central local area is for facilitating the stress concentration on the tooth crests of the central local area with the height of the projection of the tooth crest of the central local area being as low as possible. However, even if the pitch of the tooth flanks is widened to more than 2.5 times the pitch of the tooth flanks of other parts, the disadvantage that the cut edges of the film are not aligned in a straight line is more conspicuous than the effect of facilitating stress concentration. become. From the viewpoint of achieving harmony between the two, the pitch of the tooth crests arranged in the central part is preferably 2.3 to 1.2 times, and most preferably 2 to 1.5 times the tooth pitch of the other part. You will have to choose from a range. In addition, the projection size of the tooth crests referred to here is a distance between the tooth crests of the central portion from an imaginary line XX connecting the tooth crests of the tooth crests of other portions, and the tooth crest pitch is the minimum distance between the tooth crests. Say the dimensions. As a means for widening the pitch without raising the tooth crests too much, for example, it is conceivable to make the inclination angle of the tooth crests gentle or to provide a flat interval between the tooth crests. The method of deepening the valley between the teeth is desirable because it has the advantage that the sharpness is not deteriorated.

As described above, the shape of the cutting tool used in the present invention exhibits sharpness comparable to both the conventional cutting method and the central cutting method, and reduces the risk (cut) of the cutting tool. It was created in pursuit of the harmony of these three factors, that is, that the cut edges of the film are aligned in a straight line. When the present invention is intentionally evaluated for its excellent overall effect, the first invention (FIG. 1) is superior to the second invention (FIG. 3), and the first invention (FIG. 1) is superior. The three inventions (FIG. 4) are superior. Forming the protrusions of the tooth crests, although slight, is easy to continue in the direction of increasing the risk (cuts) of the blade. To address these concerns,
It is effective and more desirable to employ a tooth profile in which the virtual line connecting the blade edges of the protrusions shows a curved line as shown in FIG.

Generally, in the central cutting method, the stress that pushes and bends the tooth crests in the direction of the thickness of the base material is strongly applied to the cutting tool, and the stress in the direction of pulling out the longitudinal central part of the lid lid is strongly applied to the box lid lid. This tends to occur. In that sense, it is desirable that the base material of the cutting tool has high rigidity and is robust such as metal, plastic, and ceramic. However, when flammability is required for the cutting tool, vulcanized hardened paper, compression hardened paper, resin-impregnated hardened paper, water-gas-impregnated hardened paper, or the like having high hardness and rigidity can be used. However, the tooth flank portion is reinforced by applying a hardening resin mixed with abrasive grains or other fine particles of organic or inorganic solids to at least one surface of the tooth flank of the saw blade based on the above-mentioned hardened paper. It is more desirable to use one. For the reinforcement of the cover lid, it is desirable to employ a box structure in which two to three box-shaped paperboards are overlapped and bonded to the portion of the cover lid.

FIG. 6 is an enlarged perspective conceptual view showing one of the measures for further improving the cutting performance of the cutting tool adopted in the present invention. In FIG. 6, a part of the serrated tooth flank 7 is enlarged and shown to the extent that the front and back surfaces of the tooth flank (cutting tool) can be discriminated. In the figure, the idea here is that the saw-tooth cutting tool used in the present invention has a series of minute ridges 13 (portions drawn with thick lines) protruding to the back surface side along the ridge line on the back surface side of the tooth crest 7. To be formed intermittently or intermittently. It is sufficient that the minute ridges 13 are present at least at three positions in the longitudinal direction of the cutting tool and at the central portion over 2 to 5 cm each, and it is more preferable if they are present in all of the tooth peaks of the cutting tool. The minute ridges 13 are extremely small in the range of 0.01 to 0.1 mm in the projecting direction and about 0.008 to 0.02 mm in the cross-sectional dimension of the ridges. However, when the cutting tool having the minute ridges 13 is arranged on the covering piece 5 in the direction in which the protruding portions of the minute ridges 13 face the front plate 1, the sharpness is further enhanced by both the conventional cutting method and the central cutting method. It is desirable because it produces an effect. For example, when the saw blade is formed by punching, the minute protrusions 13 can be easily formed by adjusting the dimensional accuracy of the mold and utilizing the retromodification of the material of the cutting tool. In this case, if the size of the minute ridge 13 in the protruding direction is increased to exceed 0.1 mm, the film end after cutting is caught in the protruding portion to deteriorate the next drawing operation, or to contact the protruding portion. Since the surface of the front plate 1 is greatly scratched or damaged, the dimension in the protruding direction is 0.
Ideally, the range is from 02 to 0.07 mm.

Another device for further improving the cutting performance of the cutting tool used in the present invention is to make the surface of the cutting tool contacting the film at the central portion and both end portions in the longitudinal direction of the cutting tool each 2 to 5 cm in the longitudinal direction. It is to make it a smooth surface. That is, for example, in the case of a metal cutting tool, the part is mirror-finished, or in the case of a paperboard cutting tool, for example, an ultraviolet-crosslinking-curable resin coating is applied and cured to make a smooth surface. This means chemical processing. This action suppresses the movement of the film, which is caused by the stress applied to the film during the cutting operation, to shift to the center of the width of the film and try to escape, by the adhesive force between the smooth surface and the contacting film. And to prevent this escape movement. Keeping this film in close contact makes it easy to make scratches at the beginning of the initial cut in the film by both the conventional cutting method and the central cutting method, and is also effective in aligning the cut edges of the film in a straight line. Act on. In this case, the reason why the installation position of the smooth surface is not the entire area in the longitudinal direction of the cutting tool is that the degree of close contact of the film edge after cutting to the cutting tool is adjusted to limit the obstacles that occur on the other side. .. That is, this obstacle means that if the film edge after cutting adheres too closely to the cutting tool, the film edge after cutting rises together with the cutting tool (cover) when the lid is raised and the next film is to be pulled out. This causes a problem that the film is rewound by the momentum to the wound film side and the film end cannot be pulled out. Therefore, the smooth surface is appropriately arranged according to the adhesion performance of the smooth surface to be employed so that the effect of improving the cutting performance by maintaining the adhesion of the film can be exerted within the range where the obstacle called rewinding of the film edge does not occur. Means to adjust to.

The wrap film referred to in the present invention is a film made of synthetic resin represented by vinylidene chloride resin film, polyethylene resin film, polyester resin film, metal foil such as aluminum foil, glassing paper, wax paper. Such as long papers and laminated products of these, collectively referred to as the one that is used by pulling out the wound one. Therefore, the saw-tooth cutting tool used for this generally has a tooth height of 0.5 to 1.5 mm, preferably 0.6 to 1.2.
mm range, pitch is 0.8 to 2 mm, preferably 0.
It is selected from the range of 9 to 1.5 mm.

The shrink box of the present invention is usually 0.2 to 1.5 mm.
It is made of thick cardboard. Thick ones are generally strong, but have a poor folding processability, so a thickness of about 0.2 to 0.
It is desirable to use a relatively thin one in the range of 5 mm (weighing 180 to 550 g / m ² ).

[0016]

[Examples] Table 1 shows a comparative example (commercial item: Experiment No. 1), a target reference example (commercial item: Experiment No. 2), and an example (invention item: Experiment Nos. 3 to 6). It is a summary of the results of comparative evaluation of cutting performance. The characteristic specifications of the wrap film storage box used in the experiment are as follows.

Experiment No. 1 [commercially available Japanese Utility Model Publication No. 61-22823, a commercially available storage box corresponding to that shown in FIG. 1 (trade name:
Saran Wrap, manufactured by Dow Chemical Co., Ltd.] Cutting tool = horizontal straight tin saw blade (tooth height about 1 mm,
Pitch about 1.2 mm). Experiment No. 2 [Commercial product (trade name: NEW Clelap) manufactured by Kureha Chemical Co., Ltd. of a storage box corresponding to that shown in FIG. 1 of Japanese Patent Publication No. 4-19092] Cutting tool = V-shaped tin saw blade (tooth ridge) Height of about 0.9mm, pitch about 1.2mm).

Experiment No. 3: A straight tin saw blade of the shape shown in FIG. 1 (having a tooth height of about 1 mm, a pitch of about 1.2 mm, and a thickness of about 0.17 mm; Thickness of about 0.3 mm).
4 mm (weighing: 350 g / m ² ) attached to a storage box of the form shown in FIG. 5 obtained by using cardboard, except that the lid piece has a reinforcing structure of two cardboard.

Experiment No. 4: Experiment No. Only the cutting tool of No. 3 has a saw blade made of straight tin plate with the shape of Fig. 3 (the height of the tooth peak is about 1 m).
m, pitch of about 1.2 mm, thickness of 0.17 mm saw tooth pitch only about the longitudinal center of about 5 mm, the tooth pitch is changed to about 2 mm). Experiment No. 5: Experiment No. Only the cutting tool of No. 3 is used for the straight tin saw blade of the shape shown in FIG. 4 (the height of the tooth peak is about 1 mm, the pitch is about 1.2 mm, the thickness of the saw blade is 0.17 mm, the longitudinal center is about 5 m).
The pitch of the tooth crests is about 2 mm and the protrusion of the tooth crests is about 0.
3mm) changed.

Experiment No. 6: Experiment No. Only the cutting tool of No. 5 is made of vulcanized hardened paper [thickness: about 0.35 m
m, RK-76, manufactured by Toyo Fiber Co., Ltd., and UV-crosslinking curable adhesive resin [manufactured by Cashew, # EC-] with abrasive grains [46 alumina particles according to JIS R6001] on the back surface of all tooth crests. 12-0] changed to a fixed one.

The storage films were all unified into a 50 m roll film of Saran Wrap (trade name: Asahi Kasei). (Evaluation method) 1. Cutting suitability For both the conventional cutting method described in the text and the central cutting method, a cutting test was repeated for a film with a winding length of 50 m at a drawing interval of about 25 cm, and the practicality as a storage box with a cutting tool was evaluated by the following scale. did.

[0022] 2. Condition of film edge after cutting Observe and record the condition of film edge during the above cutting test.

[0023]

[Table 1]

[0024]

The present invention has the above-mentioned structure,
Both the central cutting method and the conventional cutting method can be performed with a cutting performance equal to or higher than that of the V-shaped cutting tool. This advantage is advantageous because it is effective in satisfying the quality demands of the recent market in which it is desired to freely select the cutting method according to the advantage of the consumer. Since the cutting tool used in the present invention is almost the same in shape as the conventional horizontal straight saw blade (the state in which the protrusion of the tooth peak at the central portion is extremely small), there is a risk of the protrusion of the tooth. The advantage is that the shapes of the cut ends of the film are aligned in a straight line, and the generation of defective cutting tool attachment positions can be returned to the original state. As described above, the fact that the central cutting method can be performed with a saw blade that is almost the same in shape as the conventional horizontal straight saw blade is surprising to the present inventors since it was completely unexpected. Therefore, the present invention is an excellent invention that plays a major role in the industrial world.

[Brief description of drawings]

FIG. 1 is an enlarged plan conceptual view illustrating the shape of a cutting tool attached to a storage box of the present invention.

FIG. 2 is an enlarged plan conceptual view illustrating the shape of a cutting tool attached to the storage box of the present invention.

FIG. 3 is an enlarged plan conceptual view illustrating the shape of a cutting tool attached to the storage box of the present invention.

FIG. 4 is an enlarged plan conceptual view illustrating the shape of a cutting tool attached to the storage box of the present invention.

FIG. 5 is a perspective conceptual view illustrating a wrap film storage box of the present invention (common to the related art).

FIG. 6 is an enlarged perspective conceptual view illustrating a cutting tool used in the present invention.

[Explanation of symbols]

 1 Front Plate 2 Bottom Plate 3 Rear Plate 4 Lid Plate 5 Cover Lid 6 Opening Piece 7 Saw-toothed Edges 8 Sideboard 9 Local Joint 10 Cutoff Line 11 Side Cover Lid 12 Cutting Tool Attachment 13 Micro Rise XX Teeth Virtual line connecting the ends R Rolled film

Claims (3)

[Claims] 1. When the unsealing piece 6 is removed, a cover plate 5 extending from the front plate 1, the bottom plate 2, the rear plate 3, the cover plate 4, the side plate 8 and the cover plate 4 in the direction to cover the front plate 1 is provided. A box for storing a wrap film, in which a rectangular box having a main part is formed with the saw-tooth tooth crests 7 exposed along the leading edge of the covering lid piece 5 which is substantially horizontal and straight. In the above, the imaginary line connecting the tooth tips of the sawtooth-shaped incisal tooth peaks 7 exposed along the tip edge of the covering lid piece 5 is such that the tooth crests at the longitudinal central portion are the heights of the tooth crests of other portions. A wrap film storage box characterized in that it is projected at a height of 2 times or less, but the other part has a shape drawn by a substantially horizontal straight line. 2. When the unsealing piece 6 is removed, the cover plate 5 extending from the front plate 1, the bottom plate 2, the rear plate 3, the cover plate 4, the side plate 8 and the cover plate 4 in the direction to cover the front plate 1 is removed. A box for storing a wrap film, in which a rectangular box having a main part is formed with the saw-tooth tooth crests 7 exposed along the leading edge of the covering lid piece 5 which is substantially horizontal and straight. In, in, the imaginary line connecting the tooth tips of the saw tooth teeth 7 exposed along the tip edge of the cover piece 5 has a shape drawn as a substantially horizontal straight line over the entire length, and is located at the central longitudinal portion. The wrapping film storage box is characterized in that the tooth gaps are arranged with a wide pitch that is 2.5 times or less than the pitch of the tooth ridges of other parts 3. When the unsealing piece 6 is removed, the cover plate 5 extending from the front plate 1, the bottom plate 2, the rear plate 3, the cover plate 4, the side plate 8 and the cover plate 4 in the direction to cover the front plate 1 is removed. A box for storing a wrap film, in which a rectangular box having a main part is formed with the saw-tooth tooth crests 7 exposed along the leading edge of the covering lid piece 5 which is substantially horizontal and straight. In, the imaginary line connecting the cutting edges of the saw-toothed tooth peaks exposed along the tip edge of the covering lid piece 5 is such that the tooth crest at the longitudinal central portion is twice the height of the tooth crests of other parts or less. Although it is protruding at the height of the other part, the other part has a shape drawn with a substantially horizontal straight line, and the protruding tooth crest has a wide pitch of 2.5 times or less the pitch of the tooth crest of the other part. Storage box for wrap film characterized by being arranged