JPH0620270U - Heat shrinkable sleeve body - Google Patents

Abstract

(57) [Summary] [Purpose] To improve the adhesion to articles and to effectively prevent the content liquid from leaking. A heat-shrinkable sleeve body which is formed into a tubular shape by connecting both edge portions 4 and 5 of the heat-shrinkable film 3 and which can be externally fitted and attached to an article 2 is provided at both ends of the film 3. Both edges so that the edges are in contact with each other.
Connection sheets 7a and 7b are adhered to the inner and outer surfaces of 4, 5 and at least the inner connection sheet 7b is made thinner than the film 3.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a heat-shrinkable sleeve body used in, for example, a dry battery.

[0002]

[Prior art]

 Generally, a dry battery is internally provided with a heat-shrinkable sleeve body for the purpose of insulation, prevention of leakage of the content liquid, etc. In the past, this sleeve body was used as a film 50 as shown in FIGS. There is a cylindrical shape formed by superposing and fixing both edge portions 51a and 51b of the sleeve body 53. The sleeve body 53 is formed by, for example, adsorbing and opening a pair of adsorbents 55a and 55b which can be separated from each other. It is fitted onto the dry battery main body 56, and then shrinks by heating and is attached to the dry battery main body 56 in a close contact manner.

[0003]

[Problems to be solved by the device]

 However, when the sleeve body 53 is mounted on the dry battery main body 56 by heat-shrinking, a gap is formed between the dry battery main body 56 in the polymerized portion 50a of the film due to the step 57 in the thickness of the film. Therefore, when the liquid content leaks from the inside of the dry cell body 56, the liquid content easily leaks to the outside through the gap 57.

The present invention has been made in view of the above conventional problems, and provides a heat-shrinkable sleeve body capable of effectively adhering to an article and effectively preventing leakage of a content liquid. The challenge is to provide.

[0005]

[Means for Solving the Problems]

 The technical means taken by the present invention to solve the above-mentioned problems are formed in a tubular shape by connecting both edge portions 4 and 5 of the heat-shrinkable film 3 and fitted onto the article 2. In the heat-shrinkable sleeve body that can be mounted, the connection sheets 7a and 7b are attached to the inner and outer surfaces of the both edge portions 4 and 5 so that both end edges of the film 3 are abutted, and at least the inner side The connecting sheet 7b is formed to be thinner than the film 3.

Moreover, the total thickness of the connecting sheets 7a and 7b is substantially equal to the thickness t3 of the film 3, and the inner connecting sheet 7b is thinner than the outer connecting sheet 7a. Preferably, it is formed.

Further, in a heat-shrinkable sleeve body which is formed into a tubular shape by superposing and fixing both edge portions 4,5 of the heat-shrinkable film 3 and which can be externally fitted to the article 2, The connection sheet 7c, which is thinner than the film 3, is attached to the inner side surfaces of both edge portions 4 and 5 of the film 3.

[0008]

[Action]

 In the sleeve body of the present invention, when the sleeve body 1 fitted on the article 2 is thermally shrunk, the sleeve body 1 shrinks and comes into close contact with the surface of the article 2. At this time, in the connecting portion of the sleeve body 1, since the film 3 is adhered through the connecting sheet 7b which is thinner than the film 3, the step due to the connecting sheet 7b is extremely small. , There is almost no gap between the film 3 and the article 2. Therefore, the adhesiveness of the connection portion of the film 3 is improved.

[0009]

【Example】

 Hereinafter, a sleeve body for a dry battery interior will be described as an embodiment of the present invention with reference to the drawings. 1 and 2 show a first embodiment of the present invention. First, in FIG. 2 (b), reference numeral 1 denotes a cylindrical sleeve body composed of a film 3 having heat shrinkability. A metal jacket 15 is externally fitted and mounted on the dry battery main body 2, and a metal jacket 15 is provided on the outside of the sleeve body 1.

The sleeve body 1 has a good heat shrinkability as shown in FIGS. 1A and 2A. For example, the heat shrinkage rate at 100 ° C. is 50 in the circumferential direction of the sleeve body 1. %, And 15% or more in the other direction. A film 3 made of polystyrene or a styrene copolymer is formed into a tubular shape by connecting both edges 4, 5 of the film 3.

That is, for example, heat-shrinkable band-shaped tapes 7a and 7b as connecting sheets are provided on the inner and outer surfaces of the both edge portions 4 and 5 so that both end edges of the film 3 are in a butted state. The edges 4 and 5 are attached over their entire lengths. The wall thickness t2 of the inner connecting sheet 7b is smaller than the wall thickness t1 of the outer connecting sheet 7a, and the total wall thickness of both connecting sheets 7a and 7b is substantially equal to the wall thickness t3 of the film 3. Is configured to be.

The tapes 7a and 7b may be made of the same material as the film 3, or may be made of different materials, and may be non-heat-shrinkable. Moreover, the thicknesses t1 and t2 of the two connecting sheets 7a and 7b may be equal, and the total thickness of the two connecting sheets 7a and 7b may be appropriately set to the thickness t3 or less of the film 3. It is also possible that the inner connecting sheet 7b is thinner than the film 3.

The sleeve body 1 of the first embodiment is configured as described above. Next, a case where the sleeve 1 is externally fitted and attached to the dry battery main body 2 will be described. First, the sleeve body 1 has a long shape and is wound in a roll state in a flat state. At this time, the connecting sheets 7a and 7b connecting the both edge portions 4 and 5 are located at the center from the both folding positions 1a and 1a of the sleeve body 1.

Next, the sleeve body 1 is appropriately cut into a predetermined length by a cutting means such as a cutter, and the cut sleeve body 1 is separated by a pair of adsorbents 10 and 11 which can be separated from each other in a flat state. It is pinched from both sides.

Further, when the two suction bodies 10 and 11 are separated from each other while the sleeve body 1 is suctioned, the sleeve body 1 is opened (see FIG. 1B). At this time, the abutting portion 3a of the film 3 has a waist strength (bending force) substantially equal to that of the film 3 because the connecting sheets 7a and 7b are attached to both surfaces of the both edge portions 4 and 5. Since it has no local bending and the sleeve body 1 is expanded into a substantially circular shape, the sleeve body 1 can be easily fitted onto the dry battery main body 2 from above.

The dry battery main body 2 to which the sleeve body 1 is fitted is conveyed to a shrink device by a conveyor device and heat-shrinked. The sleeve body 1 attached to the dry battery main body 2 is in close contact with the surface of the dry battery main body 2, but both edges 4, 5 of the film 3 are in close contact with the dry battery main body 2 via the thin tape 7b. Therefore, the step 20 of the film 3 becomes small, and there is almost no gap between the film 3 and the dry battery main body 2 (see FIG. 2A).

Next, a metal jacket 15 is put on the outside of the sleeve body 1 mounted on the dry battery body 2 (see FIG. 2B). In the above structure, even if the content liquid leaks from the inside of the dry battery main body 2, there is almost no gap between the film 3 and the dry battery main body 2, so that the content liquid is preferably prevented from leaking to the outside of the film 3. It will be possible.

FIG. 3 and FIG. 4 show a second embodiment of the present invention, in which both edge portions 4 and 5 of the film 3 are polymerized and fixed by a means such as dissolution bonding with a solvent. The overlap margin L of the overlapped portions of the both edge portions 4 and 5 is set to approximately 0.5 to 2 mm. Reference numeral 7c is a tape as a connecting sheet, which is attached to the inner surfaces of both edge portions 4 and 5 to reinforce the adhesion of the film 3, and its width can be set arbitrarily, but 5 to 10 mm is preferable. The thickness t4 of the film 3 is smaller than the thickness t3 of the film 3.

Therefore, when the sleeve body 1 having the above-mentioned structure is fitted onto the dry battery main body 2, the pair of adsorbents 10 and 11 are separated from each other as in the first embodiment. Since the connecting sheet 7c is attached to the inner side surfaces of the both edges 4 and 5 of the film 3 to minimize the polymerization margin L of the film 3, the film 3 can have a predetermined connecting force. As compared with the case where only the film 3 is polymerized and fixed, the waist strength of the polymerized portion can be made substantially equal to that of the other portions. Therefore, the sleeve body 1 can be opened in a substantially circular shape to facilitate easy attachment to the dry battery main body 2. It can be fitted on the outside.

Further, when the sleeve body 1 is heat-shrinked, the film 3 adheres to the dry battery main body 2 through the thin tape 7c, so that the step 20 of the film 3 due to the tape 7c is extremely small. As a result, it is possible to effectively prevent the leakage of the content liquid in the dry battery main body 2. The means for fixing the both edges 4 and 5 of the film 3 may be heat sealing or joining with an adhesive, but joining with a solvent is preferable because the polymerized portion has no hardness and the heat shrinkability does not deteriorate. .

It should be noted that the present invention is not limited to the above-mentioned embodiment, but in the above-mentioned embodiment, the sleeve body 1 is composed of the film 3 made of polystyrene or styrene copolymer, but other synthetic resin materials are used. The film may be any film, and the material is not limited. Moreover, the connecting sheets 7a, 7b, 7c are not limited to the above tapes. Furthermore, although the sleeve body for a dry battery is illustrated in the above-mentioned embodiment, it goes without saying that the sleeve body is not limited to the one for a dry battery.

[0022]

[Effect of device]

 As described above, since the connecting sheet for the sleeve body of the present invention is thinner than the film, the gap between the film and the article at the film connecting portion when the sleeve body is heat-shrinked and mounted on the article. Can be almost eliminated, and it is possible to improve the sealing property of the film to the product. Therefore, in particular, when the sleeve body is attached to an article containing a liquid such as a dry battery main body, there is an advantage that the content liquid can be preferably prevented from leaking from the article to the outside.

Moreover, both edges of the heat-shrinkable film are polymerized and fixed, and a connection sheet thinner than the film is attached to the inner surface of both edges of the film. By doing so, compared with the case where only the film is polymerized and fixed, the sleeve body can be opened into a substantially circular shape and can be easily fitted onto the article, and the series of mounting operations can be automated.

[Brief description of drawings]

FIG. 1 shows a first embodiment of the present invention, (a) is a cross-sectional view of a film, and (b) is a plan view with a sleeve body opened.

FIG. 2 shows a first embodiment of the present invention, in which (a) is a sectional view of a main part in a state where a sleeve body is attached to a dry battery main body, and (b) is an overall sectional view.

FIG. 3 shows a second embodiment of the present invention, (a) is a cross-sectional view of the film, and (b) is a plan view with the sleeve body opened.

FIG. 4 is a cross-sectional view of essential parts in a state where the sleeve body is attached to a dry battery body.

FIG. 5 shows a conventional example, (a) is a plan view with a sleeve body opened, (b) is a cross-sectional view of a main part with the sleeve body attached to a dry battery body, and (c) is a cross-sectional perspective view. .

[Explanation of symbols]

2 ... Dry battery main body (article), 3 ... Film, 4,5 ... Edge portion,
7a, 7b, 7c ... Connection sheet

Claims (3)

[Scope of utility model registration request] 1. Both edges 4 of a film 3 having heat shrinkability,
It is formed into a tubular shape by connecting 5 and the article 2
In the heat-shrinkable sleeve body that can be externally fitted and attached, connecting sheets 7a and 7b are attached to the inner and outer surfaces of the both edge portions 4 and 5 so that both end edges of the film 3 are in a butted state, and The heat-shrinkable sleeve body, wherein the inner connecting sheet 7b is made thinner than the film 3. 2. The total thickness of the connecting sheets 7a and 7b is substantially equal to the thickness t3 of the film 3, and the inner connecting sheet 7b is thinner than the outer connecting sheet 7a. The heat shrinkable sleeve body according to claim 1. 3. Both edges 4 of the film 3 having heat shrinkability,
It is formed into a tubular shape by polymerizing and fixing 5 and
In a heat-shrinkable sleeve body that can be externally fitted to the article 2,
A heat-shrinkable sleeve body, characterized in that a connection sheet 7c thinner than the film 3 is attached to the inner side surfaces of both edge portions 4, 5 of the film 3.