JPH07329959A - Wrapping film storage box - Google Patents

Abstract

PURPOSE:To prevent a film from slipping at the start of cutting while preventing an unwinding phenomenon after the film is cut. CONSTITUTION:In a wrapping film storage box in which an extending piece 6 is provided on a lid part 5 of a box body 1, a smooth layer 8 for preventing an unwinding phenomenon of a film F is provided on a front surface of a front plate part 2 to be overlapped on the extending piece 6, and a cutting blade 7 is provided on the rear surface of the top part of the extending piece 6, high- adhesion surfaces B, B having an adhesive power to the film F higher than the other part are formed on both end parts of the cutting blade 7 in the longitudinal direction of the box, that serve as a start point of cutting the film.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wrap film storage box used for packaging and coating foods.

[0002]

2. Description of the Related Art A storage box of this type forms a box body with a front plate portion, a bottom plate portion, a rear plate portion, and a lid portion having an extending piece that overlaps the front surface of the front plate portion. A tin cutting blade with a serrated cutting edge is provided on the back surface of the tip of the extension piece in this box body, and the wrap film wound in a roll shape and stored in the box body is pulled out to the desired length and cut. It is designed to be cut with a blade.

In such a storage box, a so-called reversal phenomenon occurs in which the edge of the film after cutting returns to the inside of the box, which causes a problem that the films come into close contact with each other and the next drawing is difficult. there were.

Therefore, conventionally, by forming a coating film of varnish on the front center portion of the front plate portion of the box main body, or almost the entire width, or by sticking a plastic film, the front plate portion can be made to have a greater thickness than other portions of the front plate portion. A technique has been proposed in which a smooth layer (reverse stopper) having a high adhesion to the film is provided, and the cut end of the wrap film is closely captured on the smooth layer to prevent the reverse movement (Japanese Patent Laid-Open No. 63-55043). JP-A-6
No. 3-248646 and JP-A No. 64-9151).

However, as described above, in the structure in which a cutting blade is provided on the back surface of the tip of the extending piece of the lid and the film is sandwiched between the side surface of the cutting blade and the front plate to cut the film. In some cases, the edge of the film is in close contact with the side surface of the cutting blade, so that the anti-return effect was still uncertain.

Therefore, as a countermeasure against this point, a technique has been proposed in which the entire surface of the cutting blade is matt-finished to form a fine rough surface, and the adhesion of the film to the surface of the cutting blade is weakened.

[0007]

However, in this way, at the beginning of cutting, the film slips at the contact portion with the side surface of the cutting blade, and the sharpness deteriorates, and at the cutting portion, the film becomes wrinkled and the cutting edge becomes wrinkled. However, it was not pierced, but it was forcibly torn and the cut ends were wrinkled or stuck together.

In view of the above circumstances, the present invention provides a wrapping film storage box capable of preventing slipping of the film at the beginning of cutting while ensuring the function of preventing backward movement.

[0009]

According to a first aspect of the invention, a front plate portion, a bottom plate portion, a rear plate portion, and a lid portion form a box body for storing a wrap film wound in a roll shape. Then
In the lid portion, with the extension piece provided on the front surface of the front plate portion in a state where the lid portion is closed, the tip end back surface of the extension piece, a cutting blade for cutting the drawn wrap film, In the storage box of the wrap film provided in a state in which the blade tip is projected to the tip side of the extending piece, the surface of the box length direction end portion which is the film cutting start point in the cutting blade, than the surface of the other blade portion High adhesion with the wrap film While forming a high adhesion surface, the front of the front plate part of the box body that overlaps the extension piece has a higher adhesion with the wrap film than other parts of the front plate It is provided with a smooth layer.

According to a second aspect of the present invention, in the structure of the first aspect, the high adhesion surface of the cutting blade is formed so as to have a lower adhesion to the film than the smooth layer.

According to a third aspect of the present invention, in the structure of the first or second aspect, only the surface of the metal cutting blade at the end portion in the length direction of the box is subjected to a polishing process to finish the surface smoothly, thereby providing a high adhesion surface. It was formed.

According to a fourth aspect of the invention, in the structure of the third aspect, the surface of the end portion in the box length direction of the tin cutting blade is subjected to a tin melting operation as a polishing process.

According to a fifth aspect of the present invention, in the structure of the first or second aspect, a coating film made of a material having a high adhesion to the wrap film is provided on the surface of the end of the cutting blade in the box length direction to provide a high adhesion surface. Is formed.

According to a sixth aspect of the present invention, in the structure according to the first or second aspect, a plastic film having a high adhesion to the wrap film is attached to the surface of the end of the cutting blade in the box length direction to provide a high adhesion surface. Is formed.

[0015]

According to the above construction, at the beginning of film cutting, the wrap film pressed against the side surface of the cutting start side end of the cutting blade comes into close contact with the high-adhesion surface of the end, so the film slips at this part. Is prevented.

Therefore, there is no risk that the film will be wrinkled or torn due to this slip,
The film is cut smoothly and reliably along the cutting blade.

Moreover, since the portion other than the high-adhesion surface has a low adhesion to the film, it is possible to reliably prevent the film from returning to the inside of the box while being stuck to the cutting blade after cutting.

According to the second aspect of the invention, the smooth layer has a higher adhesion to the film than the high adhesion surface of the cutting blade.

Further, according to the third and fourth aspects of the invention, since the high adhesion surface can be formed at the stage of finishing the original plate of the cutting blade, the processing cost is low.

On the other hand, according to the fifth and sixth aspects, it is possible to select the material of the coating film or the plastic film according to the material of the wrap film and appropriately set the adhesion of the high adhesion surface.

[0021]

Embodiments of the present invention will be described with reference to the drawings.

This storage box is composed of a box body 1 formed in an elongated rectangular parallelepiped shape and a cutting blade 7 made of tin.

The box body 1 is formed by punching thick paper.
The front plate part 2, the bottom plate part 3, the rear plate part 4, the lid part 5, and the end plates 2a, 3a, 4 extending at both ends in the longitudinal direction of these parts.
a, 5a and the folded-back portion 2b of the front plate portion 2 are integrally connected, folded inside inward along the folding line A shown by the broken line in FIG. 1, and then glued at the overlapping portions. As shown in FIG. 2, the wrap film F, which is assembled and wound in a roll shape, is housed inside.

In the lid portion 5, an extension piece 6 which overlaps the front surface of the front plate portion 2 in the assembled state and both end plates 6a, 6a thereof are integrally connected, and a box is provided on the rear surface of the tip portion of the extension piece 6. The cutting blade 7 is attached by caulking or the like over the entire length in the length direction.

The extension piece 6 is integrally provided with an edge plate portion 6b as shown in FIG. 1, and when the box is used, the edge plate portion 6b is cut along the cutting blade 7 to form a serrated edge 7a.
To project outside.

On the other hand, on the front surface of the front plate portion 2 which overlaps the extension piece 6, a smoothing layer 8 which is smoother than the other portions of the front plate portion 2 and has a high adhesion to the film F is provided over almost the entire width. There is.

The smooth layer 8 can be formed, for example, by applying a crosslinkable curing varnish and crosslinking (curing) it.

In the cutting blade 7, only the surfaces B and B of both ends (shown by hatching in FIGS. 1 to 3) of the mat-finished blade in the lengthwise direction are subjected to a polishing process and the other portion C is provided. By making the surface smoother than that, a high adhesion surface having a high adhesion with the wrap film F is formed (hereinafter, for comparison, the surface C of the other portion is referred to as a low adhesion surface).

As a polishing method for forming the high adhesion surfaces B, B, (a) after tin-plating a dull-finished original plate, only both ends are subjected to heat treatment by direct fire, hot air, etc. Can be smoothed to give luster, or (b) after tin-plating a bright-finished original plate, and then performing a tin-melting operation only on both ends.

Incidentally, such processing can be carried out for each cutting blade, but can also be carried out at the stage of finishing the original plate of the cutting blade 7. This will reduce the processing cost. Alternatively, this processing can be incorporated in the step of attaching (blading) the cutting blade 7 to the box body 1.

The high-adhesion surface B may be provided only on the end of the wrap film F on the cutting start side, but the box for drawing and cutting the film may be selected depending on whether the user is right-handed or left-handed. Since it may be in different directions, it is desirable to provide it at both ends.

The high adhesion surfaces B and B are the film F.
The smoothness is set so that the adhesive force with respect to is lower than that of the smooth layer 8.

In this structure, when the wrap film F is cut, the wrap film F is pulled out to a desired length as shown in FIG.
The entire box is rotated while being pressed between the side surface of the cutting blade 7 and the front plate 2, or the film F is pulled along the cutting blade 7.

In this way, the end portion of the film F which is pulled out adheres to the smoothing layer 8 by self-adhesion, while the end portion of the film F on the side of the start of cutting becomes the high adhesion surface B at the beginning of cutting. In close contact.

As a result, the end portion of the film F on the cutting start side is fixed to the side surface of the cutting blade 7, so that the occurrence of slip between them is prevented, and the blade edge 7a is reliably pierced into the film F. The cutting action is smooth.

That is, the sharpness is improved and the film F is
There is no risk of forcible tearing and wrinkling or sticking of the cut ends.

The portion other than the high adhesion surface B (low adhesion surface C) is the film F.
The film F does not adhere to this low adhesion surface C, and most of the film F adheres to the smooth layer 8. This smooth layer 8 is the high adhesion surface B of the cutting blade 7. By setting the adhesive force with the film F higher than that, it is possible to reliably prevent the phenomenon that the film F returns to the inside of the box while being stuck to the cutting blade 7 after cutting.

The adhesion of the high adhesion surface B to the film F is within a range in which slippage with the film F can be prevented, and the rebound phenomenon of the film F does not occur, that is, the thumb is released from the extension piece 6 after cutting. At this time, the wrapping film F has a size such that the high adhesion surface B naturally separates from the film F due to the restoring force of the extending piece 6 in the direction away from the front plate portion 2, and such adhesion is obtained. The smoothness and area of the high adhesion surface B may be selected according to the material (degree of self-adhesion).

By the way, in the above-mentioned embodiment, the surface of the cutting blade 8 is polished to form the high adhesion surface B, but as another means, a film F is formed on the surface of the cutting blade 7 as shown in FIG. The high-adhesion surfaces B and B may be formed by providing a coating film made of a material having high adhesiveness or by adhering a plastic film.

In the case of the former coating means, for example, polyvinylidene chloride film, polyethylene film wrap film, vinylidene chloride resin, vinyl chloride resin, phenol resin, epoxy resin, vinyl acetate resin, polyester resin, Cellulose acetate, methyl cellulose, polyvinyl alcohol resin, acrylic resin, various polyolefin resins, or various synthetic rubber paraffin waxes such as natural rubber, styrene rubber, and butadiene rubber are effective.

According to the coating method or the plastic film sticking method, the material of the coating film or the plastic film can be selected according to the material of the wrap film F, and the adhesion of the high adhesion surface can be properly set.

On the other hand, in the above embodiment, the case where the tin cutting blade was used was described, but the present invention can be applied to the case where the aluminum cutting blade is used and the case where the plastic cutting blade is used. it can.

The smooth layer 8 may be provided only on the front surface of the central portion of the portion of the front plate portion 2 which overlaps the extending piece 6.

[0044]

As described above, according to the present invention, a cutting blade is provided in a wrap film storage box in which an extending piece is provided on the lid portion of the box body and a cutting blade is provided on the rear surface of the tip of the extending piece. At the end of the box length direction, which is the starting point for film cutting in
Since a high-adhesion surface with higher adhesion to the wrap film than other parts is formed, the wrap film pressed against the side of the cutting start side end of the cutting blade at the beginning of film cutting has high adhesion at the same end. It is in close contact with the surface, which can prevent the film from slipping at the start of cutting.

Therefore, the sharpness is improved, there is no possibility that the film will be wrinkled or torn by slip, and the film can be cut smoothly and surely along the cutting blade.

Moreover, since the portion other than the high-adhesion surface has a low adhesion to the film, it is possible to reliably prevent the film from returning to the inside of the box while being stuck to the cutting blade.

In particular, according to the invention of claim 2, the smooth layer has a higher adhesion to the film than the high adhesion surface of the cutting blade.

Further, according to the third and fourth aspects of the present invention, since the high adhesion surface can be formed in the finishing stage of the original plate of the cutting blade, the processing cost is low.

On the other hand, according to the fifth and sixth aspects of the invention, the material of the coating film or the plastic film can be selected according to the material of the wrap film, and the adhesion of the high adhesion surface can be properly set.

[Brief description of drawings]

FIG. 1 is a development view of a storage box according to an embodiment of the present invention before assembly.

FIG. 2 is a perspective view of the assembly.

FIG. 3 is a partially enlarged view of a cutting blade of the storage box.

FIG. 4 is a cross-sectional view when a film is cut.

FIG. 5 is a perspective view of a cutting blade according to another embodiment of the present invention.

[Explanation of symbols]

 1 Box main body 2 Front plate part 3 Bottom plate part 4 Rear plate part 5 Lid part 6 Extending piece 7 Cutting blade B High adhesion surface C of cutting blade C, C Surface other than high adhesion surface 8 Smooth layer

Claims (6)

[Claims] 1. A front plate portion, a bottom plate portion, a rear plate portion, and a lid portion constitute a box main body for storing a roll-wrapped wrap film, and the lid portion is provided with the lid portion. In addition to providing an extending piece that overlaps the front surface of the front plate portion in the closed state,
On the back surface of the tip of the extension piece, a cutting blade for cutting the drawn wrap film, in the storage box of the wrap film provided with the blade tip protruding toward the tip side of the extension piece,
The surface of the box length direction end portion to be the film cutting start point in the cutting blade, while making a high adhesion surface having a high adhesion with the wrap film than the surface of the other blade portion, the above in the front plate portion of the box body A storage box for a wrap film, characterized in that a smoothing layer having a higher adhesion to the wrap film than the other part of the front plate portion is provided on the front surface of the portion overlapping the extending piece. 2. The wrapping film storage box according to claim 1, wherein the high-adhesion surface of the cutting blade is formed so that the adhesion to the film is lower than that of the smooth layer. 3. A high-adhesion surface is formed by smoothing only the surface of the metal cutting blade at the end portion in the box length direction to give a smooth finish.
Alternatively, the wrap film storage box described in 2. 4. The wrapping film storage box according to claim 3, wherein the surface of the end portion of the tin cutting blade in the box length direction is subjected to a tin melting operation as a polishing process. 5. The high-adhesion surface is formed by providing a coating film made of a material having high adhesion with a wrap film on the surface of the end of the cutting blade in the box length direction to form a high-adhesion surface. Wrap film storage box. 6. The high-adhesion surface is formed by sticking a plastic film having a high adhesion to a wrap film on the surface of the end of the cutting blade in the box length direction to form a high-adhesion surface. Wrap film storage box.