JPH06293312A - Method for wrapping hollow object - Google Patents

Abstract

PURPOSE:To reduce a production cost and also easily and quickly wrap a hollow object with little breakage of a film due to interference of both ends of the film during transportation, etc., by applying both ends of the film along an inner periphery of the object. CONSTITUTION:After a heat-shrinkable film 3 which is a cylinder longer than an object 1 having a hollow part 2 is fitted to outside of the object 1, the heat- shrinkable film 3 is heated to reduce diameters of both ends 5a, 5b protruding from the object 1, and both ends 5a, 5b of the film 3 which is flexible immediately after heating are pushed into the hollow part 2 by a pusher 10 to apply the ends along an inner periphery 1a of the object 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for packaging a hollow article formed by winding a long body such as a metal filament and a cord wire into 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. At present, it is transported and stored, and the article is packaged by winding a band-shaped tape 50 from the outer peripheral surface of the article 51 to the inner peripheral surface of the hollow portion 52 as shown in FIG. (Conventional example 1).

Further, as another packaging means, there is a case where the article is covered with a film or a wrapping paper as a packaging material, and the end portion of the packaging material is folded into the hollow portion of the article for packaging (conventional example 2). .

[0004]

The packing means of the prior art example 1 has a drawback that it takes time for the packing work since the tape is wound, the work efficiency is poor and the production cost is high. 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, in the conventional example 2, as in the case of the conventional example 1, the work of folding both end portions of the packaging material into the hollow portion of the article is performed only by hand, and the both end portions of the film are wrapped around the inner circumference of the article. Can't fit along the surface, which is why
For example, when the article is suspended and carried by a hook or the like, both end portions may be caught by the hook and the film may be broken.

The present invention has been made in view of the above-mentioned problems of the prior art, and both end portions of a film for packaging a hollow article are arranged along the inner peripheral surface of the article so that both end portions can be transported or the like. It is an object of the present invention to provide a method for packaging a hollow article which hardly obstructs the film and breaks the film, reduces the production cost, and can be packaged easily and quickly.

[0007]

The present invention has been made in order to solve the above-mentioned problems, and the feature of the first means is that an article 1 having a hollow portion 2 has a cylindrical shape longer than the article 1. After the heat-shrinkable film 3 is externally fitted, the heat-shrinkable film 3 is heated so as to reduce the diameters of both ends 5a, 5b protruding from the article 1, and both ends 5a of the flexible film 3 immediately after being heated by the pushing device 10. , 5b are pushed into the hollow portion 2 so as to be along the inner peripheral surface 1a thereof.

The feature of the second means is that the hollow portion 2
After the tubular heat-shrinkable film 3 longer than the article 1 is externally fitted to the article 1 having, the both ends 5a, 5b of the heat-shrinkable film 3 protruding from the article 1 are reduced by heating, and The both ends 5a and 5b of the film 3 which has been made flexible by heating are pushed into the hollow portion 2 by the pushing device 10 and are made to follow the inner peripheral surface 1a thereof.

[0009]

In the method for packaging a hollow article according to the present invention, the article 1
When the packaging film 3 covering the
5a and 5b contract, and the diameter of the article 1 decreases toward both end surfaces 1a. When both end portions 5a, 5b of the film 3 immediately after the heating are in a flexible state before being cooled to room temperature, both end portions 5a, 5b of the film 3 are pushed into the hollow portion 2 by the pushing device 10. 5a and 5b can be easily formed along the inner peripheral surface 2a of the hollow portion 2 so that both end portions 5a and 5b do not become an obstacle during transportation.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In FIG. 2 (c), reference numeral 1 denotes a packaged article having a hollow portion 2 in the center, which is formed by winding, for example, a metal filament in a coil shape. The article 1 is a heat-shrinkable film for packaging (hereinafter referred to as a film). 3) and the inner peripheral film 24, and the entire surface is tightly covered with a packaging material 5.

Next, the pushing device 10 for the film end used when the article 1 is wrapped with the film 3 will be described. In FIG. 3, FIG. 4 (a) and FIG.
The pushing device 10 is for pushing both end portions 5a, 5b of the film 3 against the inner peripheral surface 1a of the article 1, and a supporting shaft 11 which can be retracted and retracted by a cylinder (not shown) relatively slides on a slide body 12. It is freely inserted. Rear ends 14a of a plurality of pressing plates 14 curvedly formed so as to follow the shape of the inner peripheral surface 1a of the article 1 are pivotally supported on the slide body 12 through pins 15 so as to be swingable.

The tip of the support shaft 11 and each pressing plate 14
A link 17 is pivotally connected to the distal end portion 14b of the pin via pins 18 and 19. Therefore, the tip end side of the pressing plate 14 can be expanded and contracted by sliding the pivot shaft 15 through a cylinder mechanism (not shown). The outer diameter on the rear end side of the pressing plate 14 is set to be substantially equal to or larger than the diameter of the inner peripheral surface 1a so that both end portions 5a and 5b of the film 3 can be pressed against the inner surface 1a of the article 1. It is preferable to set. Further, it is possible to give an elastic force to the pivoting portion of each pressing plate 14 and the slide body 12 in the expansion / contraction direction of the pressing plate 14.

Further, the pushing devices 10 are arranged on both sides of the film 3, and the pushing devices 10 are movably provided in the front-rear direction so that they can be inserted into the inner peripheral surface 1a of the article 1.

Next, a method of packaging the article 1 using the pushing device 10 will be described. First, a tubular film 3 having a heat shrinkability longer than the width L of the article 1 is externally fitted to the article 1 (see FIG. 1A). Further, when the entire heat shrinkable film 5 is heated and shrunk by the heating device 20, both end portions 5a and 5b shrink and deform into an L-shaped cross section having a small diameter portion 21 as shown in FIG.

Further, in a flexible state before the film 3 is cooled to room temperature immediately after the film 3 is heated,
The pushing device 10 is approached from both sides of the film 3 (see FIG. 3). The pressing plate 14 of each pushing device 10 is in a reduced diameter state, and while pushing the L-shaped both ends 5a and 5b into the hollow portion 2 of the article 1 by the pressing plate 14, the pushing device 10 is pushed into the hollow portion 2.
Insert inside. Further, by expanding the diameter of each pressing plate 14 of the pushing device 10, both end portions 5a, 5b of the film 3 are moved to the inner peripheral surface 1a of the article 1 by the pressing plate 14 as shown in FIGS. Press.

Since both ends 5a, 5b are pushed into the hollow portion 2 while the film 5 immediately after heat shrinking is in a flexible state, the bent portions of both ends 5a, 5b can be easily extended flat. Both end portions 5a and 5b can be closely attached along the inner peripheral surface 1a (see FIG. 1C and FIG. 4A).

Next, as shown in FIG. 2 (a), the cylindrical inner peripheral film 24 is inserted into the hollow portion 2 and the film 3 is formed.
After applying the hot-melt adhesive 44 over the entire circumferences of the both ends 5a, 5b of the inner circumference, the inner circumference film 24 is expanded and pressed against the both ends 5a, 5b of the film 3 as shown in FIG. . The inner peripheral film 24 is adhered to both ends 5a and 5b of the film 3 in a close contact manner, whereby the outer peripheral film 3 and the inner peripheral film 24 package the object 1 in a hermetically sealed manner.

In the packaging method having the above-mentioned structure, the film 3 and the inner peripheral film 24 can easily and quickly seal and package an article, and foreign matters such as dust and dust can be contained in the film 3 and the inner peripheral film 24. Is not likely to enter,
In particular, even if the article is a metal filament, it is possible to suitably prevent the intrusion of water droplets, and there is an advantage that the article can be prevented from corroding.

The packaging method of the present invention is not limited to the above embodiment, and when the width L of the article 1 is small as shown in FIG. 6, it can be packaged by the single film 3. is there. That is, after heating the film 3, first, one of the both end portions 5a and 5b is pushed by the pushing device 10, and the other is pushed so as to be superposed on one.

In the embodiment shown in FIG. 6, since the number of the packaging film 3 is one, the number of parts can be reduced, and moreover, since there is only one adhesive portion, a better sealing property can be obtained. can get. It is preferable that at least the surface of the pressing plate 14 of the pushing device 10 is made of a material that does not easily take the heat of the film 3 and is slippery, and when the temperature of the film 3 is lowered, after reheating with the heating device 20, Even if the both end portions 5a and 5b are pushed in, both end portions of the film 3 are heated while the pushing device 10 is provided with a heating device and is heated by the pressing plate 14.
You may push in 5a and 5b.

Further, the article 1 is not limited to the metal linear body,
It may be a bundle of strings or the like, and is not particularly limited. Further, the type of adhesive can be set arbitrarily other than hot melt, and further, the film 3 and the inner peripheral film 24 are made of a heat-bondable material, and both ends 5a and 5b of the heat shrinkable film 5 are formed. It is also possible to directly heat-bond the inner peripheral film 24 and the inner peripheral film 24. Further, in the case of the embodiment shown in FIG. 6, both end portions 5a and 5b of the film 3 are the articles 1
If the state along the inner peripheral surface 1a can be maintained, it is not always necessary to use an adhesive.

[0022]

In the method for packaging a hollow article of the present invention, when both end portions of the film are pushed into the hollow portion of the article 1, the both end portions are pushed in a flexible state, so that the both end portions of the film are hollow. It is possible to surely adhere to the inner peripheral surface of the portion.

Therefore, even if the article is hung by a hook or the like during transportation, the both end portions of the film are hardly disturbed and the film is not broken, and moreover, compared with the conventional manual packaging work. However, an automatic wrapping operation can be performed by using the pushing device, the articles can be easily and quickly wrapped, and the cost can be reduced and the work efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a sectional front view showing a packaging process according to an embodiment of the present invention.

2A and 2B are sectional front views showing a packaging process, and FIG. 2C is an overall perspective view including a partially broken state of an article wrapped with a film.

FIG. 3 is a cross-sectional front view of a main part before the both end portions of the film are pushed into the hollow portion of the article by the pushing device.

FIG. 4A is a cross-sectional front view of an essential part of the state where both end portions of the film are pushed into the hollow portion of the article by the pushing device,
(B) is a cross-sectional front view of the main parts of the article and film.

FIG. 5 is a sectional side view showing a state where the pushing device is pushed into the hollow portion of the article.

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

FIG. 7 is a perspective view showing a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Article, 1a ... Inner peripheral surface, 2 ... Hollow part, 3 ... Heat shrink film, 5a, 5b ... Both ends, 10 ... Pushing device

Claims (2)

[Claims] 1. Both ends of the article (1) having a hollow portion (2) protruding from the article (1) after a tubular heat-shrinkable film (3) longer than the article (1) is fitted on the article (1). (5a),
The heat-shrinkable film (3) is heated to reduce the diameter of (5b), and both ends (5a) and (5b) of the flexible film (3) immediately after being heated by the pushing device (10) are placed in the hollow part (2). A method for packaging a hollow article, characterized in that the hollow article is pushed along the inner peripheral surface (1a) thereof. 2. A heat shrinkage projecting from an article (1) having a hollow part (2) after a tubular heat shrinkable film (3) longer than the article (1) is externally fitted to the article (1). After both ends (5a) and (5b) of the film (3) have been reduced in diameter by heating, both ends (5a) and (5b) of the film (3) which have become flexible by further heating, Pushing device (1
0) push it into the hollow part (2) and
A method for packaging hollow articles, characterized by conforming to a).