JP3862923B2 - Method for manufacturing cylindrical article package and package obtained thereby - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a package that contains a plurality of cylindrical articles such as batteries.
[0002]
[Prior art]
Conventionally, various packaging bodies for cylindrical articles have been devised and put into practical use. In particular, perforations, cuts, etc. are provided on the packaging film so that the operation when taking out the cylindrical article is easy and it is possible to determine that the cylindrical article is unused (virginity). Is formed.
For example, in a conventional package formed by covering a plurality of articles to be packaged with a heat-shrinkable film and heat-shrinking the heat-shrinkable film, the above-mentioned located in the space between the article to be packaged and the heat-shrinkable film The film portion is provided with perforations (opening means) that are broken when pressed so that the packaged article can be easily taken out.
However, in such a conventional method for producing a package, a perforation is formed in advance in a heat-shrinkable film before packaging a cylindrical article, and a film after packaging and heat-shrinking In some cases, perforations are formed. In the former case, it is relatively difficult to align the perforation with respect to the cylindrical article after packaging and heat shrinkage, and the perforation is deformed by heat, resulting in a decrease or variation in the strength of the package. there were. On the other hand, in the latter case, there is a problem that the cylindrical article is damaged.
[0003]
[Problems to be solved by the invention]
In view of the problems of the prior art as described above, the present invention can be applied to the boundary between adjacent cylindrical articles without damaging the cylindrical articles, and to the upper and lower end faces of the resulting package. Another object of the present invention is to provide a method for producing a package of a cylindrical article in which a cut portion can be easily formed.
[0004]
[Means for Solving the Problems]
The present invention relates to a method for producing a cylindrical article packaging body in which a plurality of cylindrical articles assembled in parallel are covered with a heat-shrinkable film, and the article is fixed and held by heating to shrink the film. A cutting jig composed of a V-shaped or U-shaped blade whose blade edge is a double blade is moved up and down with respect to the heat-shrinkable film positioned on the upper end surface and the lower end surface of the package, and the adjacent cylinder The present invention relates to a method for producing a package of a cylindrical article including a step (a) of forming a cut portion in a heat-shrinkable film located on the upper end surface and the lower end surface at a boundary portion of the shaped article.
The method preferably includes a step (b) of forming a perforation in a heat-shrinkable film located on a side surface of the package body at a boundary portion between adjacent cylindrical articles.
Further, the method includes a step (c) of forming a perforation in a heat-shrinkable film located at the outermost part of the upper end surface and the lower end surface of the package body at a boundary portion between the adjacent cylindrical articles. preferable.
In particular, it is effective to perform the step (a) of forming the cut portion after the step (b) of forming the perforation.
Moreover, in the said method, it is also effective to perform a process (b) and a process (c) simultaneously.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
In order to solve the above-mentioned problems, the present invention covers a plurality of cylindrical articles assembled in parallel with a heat-shrinkable film, and heats and shrinks the film to fix and hold the article. A method for manufacturing a package of a cylindrical article, comprising: a cutting tool comprising a V-shaped or U-shaped blade whose cutting edges are double-edged with respect to the heat-shrinkable film positioned on the upper end surface and the lower end surface of the package. A method of manufacturing a cylindrical article package comprising the step (a) of moving a tool up and down and forming a cut portion in a heat-shrinkable film located on the upper end surface and the lower end surface at a boundary portion between adjacent cylindrical articles I will provide a.
That is, the present invention provides a film after packaging from the viewpoint of easy alignment and stable formation of perforations having a uniform length as a method for forming perforations in a method for producing a package of cylindrical articles. As a method of adopting a method of forming perforations and forming cut portions on the upper end surface and the lower end surface of the package without damaging the cylindrical article, the greatest feature is that a blade having a specific shape is used. Have.
Below, while explaining the manufacturing method concerning this invention in order of a process, the blade which has this specific shape is also demonstrated.
[0006]
First, as a premise, in the present invention, a package of a cylindrical article that is not provided with perforations or cuts in advance is obtained. The method for obtaining this package is not particularly limited. For example, a plurality of cylindrical articles assembled in parallel are covered with a heat-shrinkable film such as polyethylene terephthalate (PET) and heated to heat the film. By shrinking, a package body of a cylindrical article formed by fixing and holding the article is obtained.
[0007]
Next, in the manufacturing method of the package according to the present invention, as shown in FIG. 1, the cylindrical articles 2 and 3 adjacent to the heat-shrinkable film located on the upper end surface and the lower end surface of the package 1 are arranged. The cutting jig 5 is moved up and down along the boundary part 4. FIG. 1 is a schematic diagram for explaining a cut portion forming process of the present invention.
And as shown in FIG. 2, the cut | notch part 6 is formed in the heat-shrinkable film located in the said upper end surface and a lower end surface. FIG. 2 is a top view of the packaging body 1 provided with the cut portions 6.
[0008]
Here, the V-shaped or U-shaped cutting jig 5 whose cutting edges according to the present invention are double-edged will be described.
FIG. 3 is a schematic perspective view of a V-shaped cutting jig 5 whose cutting edges are double-edged, and FIG. 4 is a front view of the cutting jig 5 shown in FIG. As shown in FIG. 4, the cutting jig 5 of the present invention has a V-shape, and as shown in FIG. 3, the blade 5 a is sharpened and has an acute angle on both sides. In other words, the blade 5a is V-shaped toward the inside, and the left and right blade portions are double-edged blades.
If such a V-shaped cutting jig 5 having sharpened both sides of the cutting edge is used, when the cutting jig 5 is moved up and down on the upper end surface of the package as shown in FIG. The blade 5a cuts into the film surface from the top to the bottom, and once the film is pierced by the V-shaped sharp part, the cut part 6 is formed from the outside toward the center part.
[0009]
That is, since the cutting jig 5 having the shape as described above has good sharpness, the film can be easily cut. In addition, since the blade edge is slid from the outside toward the center along the outer diameter curve (arc) of the cylindrical article on the upper end surface or lower end surface of the package, the outer periphery of the cylindrical article (for example, In the case of a battery, it becomes easy to form the cut portion 6 without damaging the label.
Moreover, the shape of the notch | incision part can be stabilized by making the part of the blade 5a into the sharpened both blades. That is, in the formation of the cut portion, the cutting jig 5 is moved up and down with respect to the film to cut the film. When the blade 5a is inserted into the film, both side portions of the blade 5a are on the left side of the cut portion and A straight notch is formed in order to push and spread evenly on the right side. On the other hand, in the case of a single-edged blade, the balance of the force that spreads the left and right sides of the cut portion is lost, and the cut portion may be formed obliquely.
[0010]
Further, in relation to the strength of the package, the length of the cut portion in the center direction of the upper end surface and the lower end surface can be arbitrarily determined by appropriately controlling the position of the cutting jig 5 that moves up and down with respect to the package. Can be changed.
Furthermore, by making the part of the blade 5a sharpened, the surface of the blade 5a of the cutting jig 5 is easy to move along the tangential direction of the outer diameter curve (arc) of the cylindrical article. There is an effect that it is difficult to bite into the outer periphery of the article. In particular, even if the cutting jig 5 is too close to the upper end surface at the boundary between adjacent cylindrical articles, the V-shaped blade 5a moves to the center while expanding the adjacent left and right cylindrical articles. Therefore, it is difficult to damage the outer periphery of the cylindrical article. Further, on the upper end surface and the lower end surface, the cut portion can be formed up to the contact point of the adjacent cylindrical article without damaging the cylindrical article.
[0011]
This is shown in FIG. FIG. 5 is a schematic view conceptually showing a state in which the cutting jig 5 approaches between the cylindrical articles 2 and 3 adjacent to each other, and the cutting according to the present invention has the blade 5a which is a sharpened double blade. The state which made the jig | tool 5 approach is shown. On the other hand, FIG. 6 is a schematic diagram conceptually showing a state in which a cutting jig 5 that is a single blade that is not sharpened is brought close.
As can be seen by comparing the schematic diagrams shown in FIG. 5 and FIG. 6, when the cutting jig 5 of the present invention shown in FIG. 5 is used, both sides of the sharpened blade 5 a are formed by the cylindrical articles 2 and 3. Since it moves in the tangential direction along the outer diameter curved surface, it moves so as to enter between the cylindrical articles 2 and 3 without damaging the cylindrical articles 2 and 3. On the other hand, as shown in FIG. 6, when the single-edged cutting jig 5 is used, the cylindrical article 2 is easily damaged at the tip portion.
[0012]
3 and 4, the shape of the cutting jig 5 is V-shaped. However, in the present invention, it may be U-shaped. FIG. 7 is a schematic perspective view of a U-shaped cutting jig 5 whose blade edge is a double-edged blade, and FIG. 8 is a front view of the cutting jig 5 shown in FIG.
Even the cutting jig 5 having such a U-shape can exhibit the same effects as those of the above-described cutting jig 5 having a V-shape.
The dimensions of the cutting jig 5 may be appropriately selected according to the dimensions of the cylindrical article included in the package (for example, the size of the dry battery).
In the U-shaped cutting jig, the blade 5 may face outward as shown in FIG. FIG. 9 is a front view of another U-shaped cutting jig.
[0013]
Next, the manufacturing method of the packaging body of the present invention includes a step (b) of forming perforations in the heat-shrinkable film located on the side surface of the packaging body at the boundary portion between the adjacent cylindrical articles. Is preferred.
The greatest feature of the present invention is the above-described method for forming the cut portion. However, in order to take out the cylindrical article from the package, it is better to provide a perforation at the boundary between adjacent cylindrical articles on the side of the package. This is because the take-out operation is easier, the direction of film cutting is stabilized, and the unused discrimination film can be left on the individual cylindrical articles constituting the package after cutting.
A method for forming the perforation is not particularly limited, and a conventionally known method can be adopted. However, since the cutting jig 5 is used for forming the cut portion as described above, for example, a method described later is used. It is preferable to use a comb-like perforation forming jig as shown in the embodiment and provide perforations by the same operation as the cutting jig 5. Here, the perforation forming jig has a comb shape, and in the case of a saw blade shape composed of a plurality of mountain-shaped blades, if the film has a curved portion or a slack portion, a uniform perforation may be formed. This is because, as a result, good cutability of the package tends not to be ensured.
Moreover, you may form perforation in the heat-shrinkable film located in the outermost part of the upper end surface of the said package, and a lower end surface in the boundary part of the said adjacent cylindrical article (process (c)).
[0014]
Although the details will be described in the embodiments described later, according to such a method, after the step (b) of forming the perforation, the step (a) of forming the cut portion can be performed, In addition, the manufacturing method of the package according to the present invention will be specifically described below with reference to examples, in which steps (b) and (c) can be performed simultaneously to shorten the manufacturing process. However, the present invention is not limited to these.
[0015]
【Example】
Example 1
Two single-cell dry batteries were wrapped in a heat-shrinkable film made of polyethylene terephthalate, and heat-shrinked by heating to obtain a package containing two dry batteries.
Next, it was subjected to a perforation and cut portion forming step as shown in FIG. FIG. 10 is a schematic diagram for explaining a process of forming perforations and cuts in the method for manufacturing a package according to the present invention.
First, as shown in (1) of FIG. 10, the first perforation forming jigs 7 and 7 ′ are brought close to the side surface of the packaging body 1 including two dry batteries, and the boundary portion between adjacent dry batteries in the packaging body 1. Perforations 9 were formed. The perforation forming jigs 7 and 7 ′ have comb-like teeth 7 a and form the perforations 9 on the heat-shrinkable film on the side surface of the package 1. The size and pitch of the teeth were determined in such a range that when the resulting package was dropped, it was broken and individual cylindrical articles were not separated.
[0016]
At the same time, as shown in FIG. 10 (1), the second perforation forming jigs 8 and 8 ′ are connected to the upper end surface and the lower end surface of the package 1 at the boundary between the adjacent dry cells 2 and 3. The heat-shrinkable film located on the outermost part of the upper end surface and the lower end surface was also perforated.
The perforation forming jigs 8 and 8 ′ used here have comb-like teeth 8a, and can form perforations on the outermost part of the boundary part of the adjacent dry batteries on the upper end surface and the lower end surface of the package. It has a shape. In particular, in order to avoid damaging the dry cell by teeth, comb-like teeth are provided only at both ends of the perforation forming jigs 8 and 8 ′ so that the teeth do not reach the vicinity of the portion where the dry cell contacts. It was.
[0017]
Next, as shown in (2) of FIG. 10, with respect to the heat-shrinkable film located on the upper end surface and the lower end surface of the packaging body, the V-shaped blade edge is a double-edged blade at the adjacent boundary portion of the dry cell. The cutting jig 5 composed of the blades was moved up and down to form the cut portions 10 in the heat-shrinkable film located on the upper end surface and the lower end surface.
The cutting jig 5 used at this time is a double-edged blade with sharp edges shown in FIGS. 3 and 4 and has a V-shaped shape. In the vicinity, the cut portion 10 could be provided without damaging the outer diameter curve portion (see (3) in FIG. 10).
[0018]
Example 2
In this example, four AA batteries were first packaged in parallel with a heat-shrinkable film and then shrunk by heating to obtain a package containing four batteries.
Next, it was subjected to a perforation and cut portion forming step as shown in FIG. FIG. 11 is a schematic diagram for explaining a process of forming perforations and cuts in the method for manufacturing a package according to the present invention.
First, as shown in FIG. 11 (1), the first perforation forming jigs 7 and 7 ′ are brought close to the side surface of the package 1 including four dry batteries, and as shown in FIG. 11 (2). The perforation 9 was formed in the boundary part of the adjacent dry battery in the package 1. Here, since there are four dry batteries, and there are three boundary portions, three perforation forming jigs 7 and 7 'are arranged on each side surface. The perforation forming jigs 7 and 7 ′ have comb-like teeth 7 a and form the perforations 9 on the heat-shrinkable film on the side surface of the package 1. In addition, about the magnitude | size and pitch of a tooth | gear, when the packaging body obtained was dropped, it determined in the range which fractures | ruptures and does not isolate | separate each cylindrical article.
[0019]
Next, as shown in (2) of FIG. 11, the V-shaped blade edge is a double-edged blade at the border of the dry cell adjacent to the heat-shrinkable film located on the upper and lower end surfaces of the package. The cutting jig 5 composed of the blades was moved up and down, and as shown in (3) of FIG. 11, cut portions were formed in the heat-shrinkable film located on the upper end surface and the lower end surface. Here, three cutting jigs 5 were used.
Since the cutting jig 5 used at this time is a double-edged blade with a sharp edge and has a V-shape, the portion (boundary portion) at which the four dry batteries at both ends are in contact with each other. In the vicinity, the cut portion 10 could be provided without damaging the outer diameter curve portion (see (3) in FIG. 11).
[0020]
【The invention's effect】
According to the method for manufacturing a cylindrical article packaging body according to the present invention, a cylindrical article packaging in which perforations are easily formed at an appropriate position of the packaging body without damaging the cylindrical article such as a battery. You can get a body.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a schematic diagram for explaining a notch forming process of the present invention.
FIG. 2 is a top view of a package provided with a cut portion in FIG.
FIG. 3 is a schematic perspective view of a V-shaped cutting jig in which the cutting edge of the present invention is a double-edged blade.
4 is a front view of the cutting jig shown in FIG. 3. FIG.
FIG. 5 is a schematic diagram showing how the cutting jig of the present invention approaches between adjacent cylindrical articles.
FIG. 6 is a schematic view showing a state in which a cutting jig that is a single blade is brought close to each other between adjacent cylindrical articles.
FIG. 7 is a schematic perspective view of a U-shaped cutting jig in which the cutting edge of the present invention is a double-edged blade.
8 is a front view of the cutting jig shown in FIG. 7. FIG.
FIG. 9 is a front view of another U-shaped cutting jig in which the cutting edge of the present invention is a double-edged blade.
FIG. 10 is a schematic diagram for explaining a process of forming perforations and cuts in the method for manufacturing a package according to the present invention.
FIG. 11 is another schematic diagram for explaining a process of forming perforations and cuts in the method for manufacturing a package according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Package 2, 3 Cylindrical article 4 Boundary part 5 Cutting jig 5a Blade 6 Notch part 7, 7 'Perforation forming jig 8, 8' Perforation forming jig 9 Perforation 10 Notch part

Claims (6)

A method for producing a cylindrical article package comprising covering a plurality of cylindrical articles assembled in parallel with a heat-shrinkable film, and heating and shrinking the film to fix and hold the article,
With respect to the heat-shrinkable film located on the upper end surface and the lower end surface of the package, a V-shaped or U-shaped cutting jig whose blade edge is a double blade is moved up and down, and at the boundary part of the adjacent cylindrical article, The manufacturing method of the package of the cylindrical article including the process (a) which forms a notch in the heat-shrinkable film located in the said upper end surface and a lower end surface. The method for producing a package for a cylindrical article according to claim 1, further comprising a step (b) of forming a perforation in a heat-shrinkable film located on a side surface of the package at a boundary portion between adjacent cylindrical articles. The method according to claim 1, further comprising a step (c) of forming a perforation in the heat-shrinkable film located at the outermost part of the upper end surface and the lower end surface of the package body along a boundary portion between the adjacent cylindrical articles. Of manufacturing a cylindrical article packaging body. The manufacturing method of the package of the cylindrical article of Claim 2 or 3 which performs the process (a) which forms the said notch | incision part after performing the process (b) which forms the said perforation. The manufacturing method of the package of the cylindrical article of Claim 3 or 4 which performs a process (b) and a process (c) simultaneously. A package for a cylindrical article manufactured by the method for manufacturing a package for a cylindrical article according to any one of claims 1 to 5.

Images