JPH0789513A - Device and method for packaging hollow article - Google Patents

Abstract

PURPOSE:To make easy and quick packaging possible for a hollow article, and to make the package tight in sealing with dust prevented from coming into packaging film. CONSTITUTION:An article 1 with a hollow 3 is covered with a heat-shrinkable tube that is longer than the article 1, and the heat-shrinkable tube 5 is heated for shrinkage so that both ends thereof protruding beyond the hollow article 1 can be smaller in diameter. Then, the shrunk ends are bent into the hollow 3 and after an inner tube 24 is inserted into the hollow 3, the inner tube 24 is stuck to both ends of the external tube 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hollow article wrapping apparatus and a wrapping method for wrapping a long body such as a metal filament and a cord wire in a coil.

[0002]

2. Description of the Related Art Conventionally, for example, long articles such as metal filaments and cords have been wound in a coil for convenient handling and then packaged in a packaging material. Currently, they are transported and stored. As a means for wrapping this article with a wrapping material, the article is covered with a film or wrapping paper as a wrapping material, and the end portion of the wrapping material is folded into the hollow portion of the article (conventional example 1).

As another wrapping means, as shown in FIG. 9, a band-shaped tape 50 may be wrapped by winding it from the outer peripheral surface to the inner peripheral surface of an article 51 (conventional example 2).

[0004]

In the packaging means of the prior art example 1, since both end portions of the packaging material are simply folded into the hollow portion of the article, the hollow portion side of the article is exposed,
There was a risk that foreign matter such as dust and dirt would enter the packaging material.

Further, the conventional example 2 has a drawback in that since the tape is wound, it takes a lot of time for the packaging work, resulting in poor work efficiency and high production cost. In particular, when the article is large, such as a metal wire wound, the work of winding the tape becomes very complicated, and the above problem is remarkable. Further, both of the above-mentioned conventional examples 1 and 2 have a poor hermetically sealed state, so that the moisture-proof effect is low, and there is a drawback that they are easily rusted particularly when the article is a metal.

The present invention has been made in view of the above-mentioned problems of the prior art, and allows a hollow article to be packaged in a hermetically sealed manner so that dust and dirt can be prevented from entering the inside of the film, and is easy. An object of the present invention is to provide a packaging device and a packaging method for a hollow article that can be packaged quickly.

[0007]

The present invention has been made to solve the above problems, and is characterized in that a method for packaging a hollow article is characterized in that an article 1 having a hollow portion 3 has a longer tube than the article 1. -Shaped outer heat-shrinkable film 5 is externally fitted, and the outer heat-shrinkable film 5 is heat-shrinked so that both end portions 5a and 5b protruding from the hollow article 1 are heat-shrinked, and the both end portions are shrunk.
After bending 5a and 5b into the hollow portion 3 and inserting the tubular inner peripheral film 24 into the hollow portion 3, the inner peripheral film 24 is attached to both ends 5a of the outer heat shrinkable film 5. It is to adhere to 5b.

Further, a feature of the hollow article packaging apparatus is that the article 1 having the hollow portion 3 is externally fitted and attached, and is heat-shrinked and both ends 5a and 5b are bent inside the hollow portion 3. Heat-shrinkable film 5, adhesive units 33a and 33b for applying an adhesive 44 on the surfaces of both ends 5a and 5b of the outer heat-shrinkable film 5, and a tubular inner peripheral film 24. And a mandrel (14) which is fitted and inserted into the hollow part (3), the mandrel (14) having an inner peripheral film (24) on both ends (5a, 5b) of the outer heat shrinkable film (5) coated with an adhesive. It is arranged to be expandable and contractible so as to be pressed.

A feature of the method for packaging a hollow article is that a hollow article 1 having a hollow portion 3 is provided with a cylindrical heat-shrinkable film 39 longer than the hollow article 1, one of which is longer than the other. After heat-shrinking the heat-shrinkable film 39 in a state where the bar 40 is inserted into the hollow part 3 by fitting it outside, the other short end 39a of the heat-shrinkable film 39 is bent into the hollow part 3 and The long end portion 39b of the above is inserted into the hollow portion 3 and adhered to the other end portion 39a.

[0010]

In the apparatus for packaging a hollow article and the method for packaging the same according to the present invention, both ends of the inner peripheral film are adhered to the surfaces of both ends of the outer heat-shrinkable film fitted on the article with an adhesive. Alternatively, by bonding both ends of the heat-shrinkable film, it is possible to seal the outer peripheral surface of the article and the peripheral surface of the hollow portion with the film. Therefore, foreign matter such as dust and dust does not enter the heat-shrinkable film for the outside and the film for the inner circumference. Moreover, since it has excellent moisture resistance, it is most suitable for packaging metal objects.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 3, 1 is a hollow portion 3 in the center
This article 1 is a product in which, for example, a metal filament is wound in a coil shape. Reference numeral 5 denotes a tubular heat-shrinkable film which is externally fitted and attached to the article 1. The film 5 is provided longer than the width L of the article 1, and both ends 5a and 5b of the film 5 are hollow after being heat-shrinked. It is folded into the part 3.

Reference numeral 7 is a mounting table for holding the article 1. The mounting table 7 is provided in parallel with a pair of rotating rollers 3a on which the article 1 is mounted.
Can be rotated by a drive motor or the like (not shown). Reference numeral 9 denotes a machine base arranged on one side of the mount base 7, and a movable base 10 is arranged along a pair of rails 8 laid in parallel with the mount base 9 in a direction in which the movable base 10 comes in contact with and separates from the mount base 7. Can be moved. A roller 11 is provided at the lower end of the machine base 9 and rolls on the rail 8.

Reference numeral 13 denotes a support body made of a pipe, the base end side of which is fixed horizontally to the upper end of the movable mount 10.
A mandrel 14 concentric with the support 13 is provided at a portion of the support 13 projecting from the movable base 10 so as to be expandable and contractable in the radial direction. That is, the mandrel 14 is composed of four curved pressing plates 15, and each of the pressing plates 15 has the supporting member at each end.
The rod 17a of the cylinder device 17 as expansion / contraction means fixed to 13 is connected, and therefore, by operating each cylinder device 17, each pressing plate 15 can be moved to expand / contract the diameter of the mandrel 14.

When each mandrel 14 is reduced in diameter, a gap 19 is formed between the upper pressing plate 15 and the lower pressing plate 15.

Reference numeral 22 is a film holder provided so as to project from the support 13 to the left and right so as to correspond to the gap 19 of the pressing plate 15, and the mandrels 14 are provided at the tips of both film holders 22.
A V-shaped notch 23 is formed along the support body 13 into which the tubular inner peripheral film 24 externally fitted and attached is pushed. Reference numeral 26 denotes a conical guide body for inserting a film, which is provided on the tip end side of the support body 13. The tip end of the support body 13 further projects from the guide body 26, and the projecting portion 27 of the guide body 26 is the mounting table 7. On the other hand, it is adapted to be inserted and supported in a support hole 31 of the machine base 30 arranged at a position opposite to the machine base 9 so as to be freely inserted and removed.

Reference numerals 33a and 33b denote a pair of adhesive units for applying a hot melt adhesive 44 to the surfaces of both ends 5a and 5b of the heat-shrinkable film 5 for the outside, and their nozzles.
Hot melt adhesive 44 can be discharged from 36.
One of the adhesive units 33a is fixed to the cylinder device 34 fixed to the movable frame 10, and the other adhesive unit 33b.
Is fixed to a cylinder device 35 fixed to the machine base 30, and these adhesive units 33a and 33b are connected to the cylinder devices 34 and 35.
The adhesive units 33a and 33b can be stopped and positioned when they come into contact with both ends of the article 1 and can be moved toward and away from the article 1.

Further, both of the cylinder devices 34 and 35 can be vertically moved and adjusted with respect to the movable mount 10 and the machine base 30,
The hollow portion 3 can be adapted to several kinds of articles 1 having different diameters.

An embodiment of the packaging apparatus of the present invention has the above-mentioned structure. Next, a method of packaging the article 1 using the apparatus will be described. First, the heat-shrinkable film 5 for the outside, which is formed in a tubular shape, is externally fitted and attached to the article 1 (see FIG. 4A).
By heat-shrinking the heat-shrinkable film 5, both ends 5a and 5b thereof are formed in a small diameter as shown in FIG. Next, the both end portions 5a and 5b formed in the small diameter shape are bent into the hollow portion 3 of the article 1 (see FIG. 4C). The bending of the film 5 is preferably performed in a flexible state of the film 5 immediately after heat shrinkage. Then, the article 1 is placed on the rotating roller 3 a of the placing table 7.

On the other hand, in the state in which the movable gantry 10 is retracted, the mandrel 14 in the reduced diameter state is fitted with the inner peripheral film 24 having substantially the same length as the article 1. Film for the inner circumference
As shown in FIG. 2, 24 is a plate member 37 and a gap 19 between the pressing plates 15.
It is pushed into the notch 23 of the film holder 22 via.

Next, the movable frame 10 is advanced together with the inner peripheral film 24, and the inner peripheral film 24 is inserted into the hollow portion 3 together with the mandrel 14, which is the inner peripheral film.
Since the inner peripheral film 24 is pushed into the film holder 22 when the inner peripheral film 24 is inserted, the inner peripheral film 24 does not interfere and do not hinder the insertion.

Next, by the operation of both the cylinder devices 34 and 35, the respective adhesive units 33a and 33b are moved forward,
It stops when it contacts both ends of the article 1. Each adhesive unit
When the positioning of the 33a and 33b is completed, the hot melt adhesive 44 is discharged from the nozzle 36 thereof, and the rotating roller 3a of the mounting table 7 rotates the article 1 so that both ends 5a of the heat shrinkable film 5 for outside, The hot melt adhesive 44 is applied over the entire circumference of the surface of 5b.

Next, the expansion / contraction cylinder device 17 is actuated to move the pressing plates 15 radially outward, thereby expanding the diameter of the mandrel 14. As the diameter of the mandrel 14 is increased, the film 24 for the inner circumference is notched 23 in the film holder 22.
And is pressed against the peripheral surface 3 of the hollow portion 3 of the article 1 via the both ends 5a, 5b of the outer heat-shrinkable film 5, and the inner film 24 is attached to the both ends 5a, 5b of the outer heat-shrinkable film 5. Are adhered in close contact with each other, so that the article 1 is packaged with the heat-shrinkable film 5 for the outside and the film 24 for the inner circumference (see FIG. 5C).

In the above embodiment, the article 1 was rotated when the hot melt adhesive 44 was applied to the both ends 5a and 5b of the heat shrinkable film 5 for the outside, but the article 1 was fixed. The adhesive units 33a and 33b may be rotated in the circumferential direction of the article 1. Further, the materials of the heat shrinkable film 5 for the outside and the film 24 for the inner circumference can be arbitrarily set.

Further, the packaging method of the present invention is not limited to the above-mentioned embodiment, and it is also possible to wrap from another heat shrink film 39 as shown in FIGS. 6 and 7 in another embodiment. Is. That is, the heat-shrinkable film 39 is externally fitted and attached to the article 1 so that one side of the heat-shrinkable film 39 is elongated (see FIG. 6A), and the heat-shrinkable film 39 is heat-shrinked with the bar 40 inserted in the hollow portion 3 of the article 1. Yes (see Figure B).

Further, after removing the bar 40 from the hollow portion 3,
Bend the other shortened short end 39a into the hollow portion 3,
A hot melt adhesive 44 is applied to the surface, and then one long end 39b is attached to the cylindrical body as shown in FIG.
By inserting the tubular body 42 into the hollow portion 3 in this state, the end portion 39 b is positioned in the hollow portion 3 and the end portion 39 b is inserted.
The tip of b is bonded to the end 39a (Fig. 7B).

In the embodiment shown in FIGS. 7 and 8, since there is only one heat-shrinkable film 39 for packaging,
The number of parts can be reduced, and moreover, since there is only one adhesive portion, sealing performance can be further obtained.

The present invention is not limited to the above-mentioned embodiments, and the article 1 is not limited to a metal filament, but may be a bundle of strings or the like, and is not particularly limited. Not something. Further, the type of adhesive can be set arbitrarily other than hot melt. Further, as shown in FIG. 8, the heat shrinkable film 5 for the outside and the film 24 for the inner circumference are made of a material capable of being heat-bonded, and both ends 5a and 5b of the heat shrinkable film 5 and the film 24 for the inner circumference are formed. It is also possible to directly heat-bond the heat roller 47 by pressing and rotating it in the circumferential direction.
Further, the single heat-shrinkable film shown in FIGS. 6 and 7 above.
Also in 39, it may be made of a heat-bondable material.

[0028]

INDUSTRIAL APPLICABILITY In the method for packaging a hollow article according to the present invention, a tubular heat-shrinking film for the outside, which is longer than the article, is fitted onto an article having a hollow portion, and the heat-shrinkable film is heated. , A heat-shrinkable film for the outside is heated and shrunk so that both ends protruding from the hollow article are reduced in diameter, the shrunk end parts are bent into the hollow part, and an adhesive is applied to the surfaces of the bent end parts. After that, by inserting the tubular film for the inner circumference into the hollow portion, and by expanding the diameter of the tubular film for the inner circumference, it is adhered to both ends of the heat shrinkable film, so that the heat shrinkable film for the outside and the inner With the peripheral film, the article can be easily and quickly hermetically packaged, and there is no risk of foreign matter such as dust or dust entering the outer heat-shrinkable film and the inner peripheral film. Penetration of water droplets even in the streak Will be able to suitably prevented,
There is an advantage that the article can be prevented from corroding.

Further, since the heat-shrinkable film for the outside and the film for the inner circumference are separate bodies, there is an advantage that a cheap film can be used for the inner circumference.

In the apparatus for packaging hollow articles, a series of articles can be automatically packaged, and the work efficiency can be improved.

[Brief description of drawings]

FIG. 1 is an overall sectional view showing an embodiment of the present invention.

FIG. 2 is a cross-sectional view of the mandrel when its diameter is reduced.

3A and 3B show an embodiment of the present invention, in which FIG. 3A is a sectional view of the mandrel when the diameter of the mandrel is expanded, and FIG.

FIG. 4 shows an embodiment of the present invention, and (A) to (C) are cross-sectional views showing the packaging process of the present invention.

5A and 5B show one embodiment of the present invention, (A) and (B) are cross-sectional views showing a packaging process, and (C) is a perspective view of an article.

FIG. 6 is a cross-sectional view showing another embodiment of the present invention, in which (A) to (C) show a packaging process.

FIG. 7 shows another embodiment of the present invention, including (a) and (b).
FIG. 6 is a cross-sectional view showing a packaging process.

FIG. 8 is a sectional view showing another embodiment of the present invention.

FIG. 9 is a perspective view showing a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Article, 3 ... Hollow part, 5a ... Heat shrink film for outside, 5a, 5b ... Both ends, 24 ... Film for inner circumference, 14 ... Mandrel, 44 ... Adhesive, 33a, 33b ... Adhesive unit, 39 ... Heat shrink film

Claims (3)

[Claims] 1. Both ends of an article 1 having a hollow portion 3 to which a tubular heat-shrink film 5 for the outside longer than the article 1 is fitted, and the heat-shrink film 5 for the outside projects from the hollow article 1. After the parts 5a and 5b are heated and shrunk to reduce the diameter, the contracted both ends 5a and 5b are bent into the hollow part 3, and after the tubular inner peripheral film 24 is inserted into the hollow part 3. The inner peripheral film 24 is provided with both ends 5a and 5b of the outer heat shrinkable film 5.
A method for packaging a hollow article, which comprises adhering to a hollow article. 2. The article 1 having a hollow portion 3 is fitted onto the article 1 and is heat-shrinked, and both end portions 5a and 5b have the hollow portion 3.
An outer heat-shrinkable film 5 that is bent inward, and an adhesive agent on the surfaces of both ends 5a, 5b of the outer heat-shrinkable film 5.
Adhesive units 33a and 33b for applying 44, and a mandrel 14 to which the tubular inner peripheral film 24 is externally fitted and inserted into the hollow portion 3 are provided, and the mandrel 14 is
Adhesive for heat shrink film 5 for outer film 24 for inner circumference
A packaging device for hollow articles, which is provided so as to be expandable and contractible so as to be pressed against both end portions 5a, 5b coated with 44. 3. A hollow article 1 having a hollow portion 3 is fitted with a tubular heat-shrinkable film 39 longer than the hollow article 1 so that one of the heat shrinkable films 39 is longer than the other, and the hollow portion 3 has a bar.
After heat-shrinking the heat-shrinkable film 39 with 40 inserted, the other short end 39a of the heat-shrinkable film 39 is bent into the hollow portion 3, and one long end 39b is left in the hollow portion 3.
A method for packaging a hollow article, characterized in that the hollow article is inserted into the other end 39a and adhered to the other end 39a.