JP2002249112A - Packaging method of wound bundles of electric wire by heat shrinking film - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packaging method of a wound bundle of electric wire by heat shrinking film wherein direct adhesion of dirt, dust, oil, water and the like to the bundle of electric wire can be prevented, an end of the film does not stingingly touch skin even if the bundle of electric wire are handled by bare hands, the electric wires can be easily taken out after binding bands are removed, any extra electric wires remained unused can be contained without scattering, bundle's form is not deformed and carrying and handling qualities can be improved. SOLUTION: The packaging method comprises a process of coating a biaxially oriented heat shrinking film 11 in a cylindrical shape on an outer circumferential face 10A of a ring of the bundle of electric wires 10 wound in a ring form, a process of fusing by heat and forming in the cylindrical shape an overlapping portion 16 of the biaxially oriented heat shrinking film 11, a process of wrapping the circumferential face 10A of the ring of the bundle of electric wire 10 and a side circumferential face 10B of the ring by heat shrinking, and a process of folding both ends of the cylindrical portion of the cylindrical biaxially oriented heat shrinking film 11 into a hole 12 of the bundle of electric wires 10 to heat-shrink again to package total circumferential face of the bundle of electric wires 10.

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 heat-shrinkable film of a bundled wire, in which a wire bundle obtained by winding and bundling wires in a ring shape is wrapped with a heat-shrinkable film.

[0002]

2. Description of the Related Art Wiring for homes, buildings, factories, etc.
Although electric wires and VVF electric wires are used, these electric wires are generally used in the form of bundled electric wires which are generally wound in a ring shape and bundled for ease of storage, transportation and handling during use. I have. Most of the bundled electric wire wound in a ring shape is wrapped in order to protect the electric wire during storage and transport and prevent collapse, and as a means for wrapping, a donut-shaped electric wire bundle is used. It is common that kraft paper is wrapped around and wound and packaged.

However, in the case of the above-mentioned wrapping by kraft paper, the amount of use as a wrapping material is increased, and it takes time to unwrap the kraft wrapping when using an electric cable. There is a problem that the contents are exposed because the kraft paper is displaced or torn. Therefore, in recent years, a wire bundle wound in a ring shape is made of polyethylene terephthalate as a raw material, and a heat-shrinkable film formed of a uniaxially stretched heat-shrinkable plastic sheet that heat-shrinks only in the outer circumferential direction of the wire bundle is used to form a hole in the wire bundle. There has been proposed a heat-shrinkable film package bundle-wound electric wire which is covered and wrapped with an opening communicating with the opening (JP-A-9-20).
No. 2372).

[0004] However, such a heat-shrinkable film-wrapped bundled electric wire is covered and packaged with an opening communicating with a hole of the electric wire bundle, so that the bundled electric wire and cable are not covered with a wire. Dust, oil, water, etc.
If stored for a long time, the appearance of the product may be affected,
When the product is handled with bare hands, there is a problem that the end of the heat-shrinkable film covering the bundled electric wire is sharply contacted with the skin and the workability is deteriorated.

Therefore, a heat-shrinkable film of a bundle wound wire covering the entire peripheral surface of a wire bundle wound in a ring by a heat-shrinkable film composed of a uniaxially stretched heat-shrinkable film which heat-shrinks only in the outer circumferential direction of the wire bundle. (Japanese Patent Publication No. 7-55692). As shown in FIGS. 6 and 7, the bundled electric wire 1 wrapped with the heat-shrinkable film by this packaging method is composed of a ring-shaped electric wire bundle 2,
A heat-shrinkable film 3 made of polyethylene terephthalate as a raw material and made of a uniaxially stretched heat-shrinkable film that heat-shrinks only in the outer circumferential direction of the wire bundle is folded and covered in the hole 4 of the wire bundle 2.

[0006]

As described above, FIGS.
The heat-shrinkable film-wrapped bundled electric wire 1 shown in FIG. 1 is manufactured by wrapping the heat-shrinkable film 3 in a bundled electric wire as follows. That is, the heat-shrinkable film-wrapped bundled wire 1 is made of polyethylene terephthalate as a raw material, and is a uniaxially stretched heat-shrinkable film 3 that is heat-shrinked only in the outer circumferential direction of the wire bundle.
Thus, the outer circumference of the wire bundle 1 is surrounded so that the contraction direction matches the outer diameter circumferential direction of the wire bundle 1, and the overlapping portion 5 of the heat shrinkable film 3 is thermally fused. Thereafter, the heat-shrinkable film 3 is heated to shrink the heat-shrinkable film 3 to form an intermediate package having sleeve openings smaller than the inner diameter of the wire bundle 2 at both ends of the wire bundle 2. Pressing the hole 4 of the package from both sides along the hole 4 of the wire bundle 2, the upper and lower portions of the heat shrink film 3 are folded. Then, the upper and lower portions of the heat-shrinkable film 3 folded into the holes 4 are joined, and the heat-sealed portion 6 is formed by heat-sealing in a ring shape at the joined portion. Further, the portion inside the ring-shaped heat-sealed portion 6 is cut and removed, and the entire peripheral surface of the wire bundle 2 is covered and packaged.

As described above, in the conventional heat-shrinkable film-wrapped bundled wire 1 for covering and surrounding the entire peripheral surface of the wire bundle 2,
Since the upper and lower portions of the heat-shrinkable film 3 are joined together, the joined portion is heat-sealed in a ring shape to form a heat-sealed portion 6, and the heat-shrinkable film 3 covers and surrounds the entire peripheral surface of the wire bundle 2. In addition, it is not easy to unwrap the heat-shrinkable film 3 to unwind the electric wire from the electric wire bundle 2.

In the conventional heat-shrinkable film-wrapped bundled wire 1 for covering and surrounding the entire peripheral surface of the wire bundle 2, the upper and lower portions of the heat-shrinkable film 3 are joined together, and the heat-fused film 3 is joined in a ring shape at the joining portion. Since the wire bundle 2 is covered and covered with the heat-shrinkable film 3, a tool such as a knife is required to unwrap the heat-shrinkable film 3 in order to unwind the wires from the wire bundle 2. There is a problem that.

[0009] An object of the present invention is to directly dispose dust, dust, or the like on an electric wire bundle.
Oil, water, etc. can be prevented from adhering, even if the bundled wire is handled with bare hands, the film edge does not hit the skin sharply, the wire can be easily taken out after releasing the binding band, and after use It is an object of the present invention to provide a method for packaging a heat-shrinkable film of a bundled electric wire, which can store the surplus electric wires without disturbing them, does not collapse the bundle shape, and can improve the portability and handleability.

[0010]

According to a first aspect of the present invention, there is provided a method for packaging a heat-shrinkable film of a bundle of electric wires, the method comprising: The biaxially-stretched heat-shrinkable film is coated, and the joining portion of the biaxially-stretched heat-shrinkable film is heat-fused to form a tubular shape, and then heat-shrinked to package the outer peripheral surface and the outer peripheral surface of the ring of the wire bundle. Then, after holding both ends of the tubular biaxially stretched heat-shrinkable film in a heat-shrinked state, the both ends of the tubular biaxially stretched heat-shrinkable film are folded into the holes of the wire bundle again. The entire circumference of the wire bundle is wrapped by heat shrinkage. With this configuration, according to the first aspect of the invention, it is possible to prevent dust, oil, water, and the like from directly adhering to the wire bundle,
Even if you handle the bundled wire with bare hands, the film edge does not hit the skin sharply, you can easily take out the wire after unraveling the binding band, you can store the used wire without dislodging it, It is possible to obtain a bundled electric wire in which the entire peripheral surface of the electric wire bundle is wrapped with a heat-shrinkable film capable of improving the carrying shape and the handling property without breaking the bundle shape.

According to a second aspect of the present invention, there is provided a method for packaging a heat-shrinkable film of a bundle of electric wires, comprising the steps of: And heat-fusing the mating portion of the biaxially stretched heat-shrinkable film to form a tube, and then forming the heat-shrinkable film into a tube having substantially the same diameter as the ring-shaped hole of the wire bundle. A jig is attached to the hole of the wire bundle, and the biaxially stretched heat-shrinkable film is heat-shrinked to form a product intermediate of the heat-shrinkable film packaged bundle wound wire. The jig is removed from the hole of the wire bundle, and both ends of the tubular biaxially stretched heat-shrinkable film are folded into the hole of the wire bundle and heat-shrinked again to package the entire peripheral surface of the wire bundle. It is like that. With this configuration, according to the second aspect of the present invention, dust, dust, oil, water, etc. can be prevented from directly adhering to the wire bundle, and even if the bundled wire is handled with bare hands, The ends do not hit the skin sharply, the wires can be easily taken out after releasing the binding band, and the used wires can be stored without dislodging, and the bundle shape will not collapse, carry and handle It is possible to obtain a bundled wire in which the entire peripheral surface of the wire bundle is wrapped with a heat-shrinkable film capable of improving the properties.

According to a third aspect of the present invention, there is provided a method for packaging a heat-shrinkable film of a bundled wire, wherein the intermediate product is tightly packaged on a ring outer peripheral surface and a ring side peripheral surface of the electric wire bundle. The heat-shrinkable biaxially stretched film is formed in a state where both ends of the tube are thermally shrunk in a tubular shape along a jig for molding a heat-shrinkable film. With this configuration,
According to the third aspect of the present invention, the outer peripheral surface and both side surfaces of the wire bundle are wrapped, and both ends of the cylindrical biaxially stretched heat-shrinkable film can be held in a state where the both ends are thermally shrunk into a cylindrical shape. Both ends of the cylinder of the biaxially stretched heat-shrinkable film can be easily folded into the inner peripheral surface of the hole of the wire bundle.

According to a fourth aspect of the present invention, there is provided a method for packaging a heat-shrinkable film of a bundled electric wire, wherein the inner periphery of a ring of a hole of a wire bundle at both ends of the cylindrical biaxially stretched heat-shrinkable film. The folding into the surface is performed while heating. With this configuration, according to the invention as set forth in claim 4, the both ends of the cylindrical biaxially stretched heat-shrinkable film can be securely adhered to the inner peripheral surface of the hole portion of the wire bundle for packaging. it can.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the method for packaging a heat-shrinkable film of a bundled wire according to the present invention will be described below.

FIG. 1 shows a heat-shrinkable film-wrapped bundled electric wire manufactured according to the method for packaging a heat-shrinkable film of a bundled electric wire according to the present invention.

In FIG. 1, reference numeral 10 denotes an IV electric wire or VVF.
An electric wire bundle in which electric wires and the like are wound in a ring shape and bound, 11 is a ring that forms a ring outer peripheral surface 10A of the electric wire bundle 10, upper and lower ring side peripheral surfaces 10B, and a hole 12 of the electric wire bundle 10. This is a biaxially stretched heat-shrinkable film that covers and packages the entire surface of the wire bundle 10 on the inner peripheral surface 10C. This biaxially stretched heat-shrinkable film 11 is made of polyethylene terephthalate (PE).
T), polyethylene (PE), polypropylene (PP)
It is a biaxially stretched heat-shrinkable film that is made of a high-molecular transparent resin (or translucent resin) and heat-shrinks in the outer circumferential direction of the wire bundle and in the width direction of the wire bundle. The biaxially stretched heat-shrinkable film 11 may be made of these materials in a laminated structure.

In general, when a polymer film is stretched by uniaxial stretching or biaxial stretching, molecules are oriented in a tensile direction (stretching direction). When the polymer film stretched in this way is heated, the stress caused by the molecular orientation oriented by stretching is increased. Is relaxed and shrinks to return to the state of the polymer film before stretching. A heat-shrinkable film for packaging electric wire bundles utilizes this property. By stretching the thermoplastic film (polymer film) at an appropriate temperature and cooling in that state, the molecular chains are oriented in the stretching direction and the shape is fixed (the film in this state is a shrinkable film or stretched film). Film), which has the property of returning to its original size when reheated, and is used for shrink wrapping.

The biaxially stretched heat-shrinkable film 11 in the present embodiment has, for example, an outer diameter of 360 mm and an inner diameter of 240 m.
The wire bundle 10 wound in a ring shape having a height of 120 mm and a height of 120 mm is covered and packaged. This biaxially stretched heat shrinkable film 11
For example, it is formed in a roll shape having a width of 220 mm and a length of 1200 mm, and is made of a PET film stretched in the width direction and the length direction so that the thickness becomes 100 μm after stretching. The biaxially stretched heat-shrinkable film 11 is, specifically, produced as a raw material having a width of about 2 m at a manufacturing plant, stretched biaxially in the width direction and the length direction, and has a normal thickness after stretching. It is formed so as to have a thickness of 50 to 200 μm and then cut again to a width of about 300 mm.

The biaxially stretched heat-shrinkable film 11 in which the wire bundle 10 is wrapped has a gap 13 so that the ends of the film in the width direction of the biaxially stretched heat-shrinkable film 11 wrapping the surface of the ring inner peripheral surface 10C do not overlap. Is formed. By forming the gap 13 so that the film ends do not overlap, the width direction film end of the biaxially stretched heat-shrinkable film 11 that wraps the surface of the ring inner peripheral surface 10C of the wire bundle 10 is uniformly heat-shrinked. Can be done.

As described above, the biaxially stretched heat-shrinkable film 11 is connected to the ring outer peripheral surface 10A of the wire bundle 10 and the ring side peripheral surface 10A.
B and the entire inner surface 10C of the ring are covered and packaged to form a heat-shrinkable film-wrapped bundled electric wire 14. In the drawing, reference numeral 15 denotes a binding band for holding the wound wire in a ring shape when packing the wire, and holding the wire wound in a ring shape with the binding band 15. 10 are formed.

FIGS. 2 to 5 show a method for packaging a heat-shrinkable film of a bundled wire in which the biaxially stretched heat-shrinkable film 11 of the heat-shrinkable film-wrapped bundled wire 14 shown in FIG. Have been.

A biaxially stretched heat-shrinkable film 11 is
First, as shown in FIG. 2, a biaxially stretched heat-shrinkable film 11 is coated in a cylindrical shape on a ring outer peripheral surface 10A of a wire bundle 10 wound in a ring shape, and biaxially stretched by heat cutting or the like. The joining portion 16 of the heat-shrinkable film 11 is heat-fused to form a tube, and the wire bundle 10 is covered from the outside.

Thereafter, as shown in FIG. 3, a jig 17 for molding a heat-shrinkable film is attached to the ring-shaped hole 12 of the wire bundle 10. The jig 17 for forming a heat-shrinkable film is constituted by a cylindrical body formed into a cylindrical shape having an outer diameter substantially the same as the hole 12 or a rod-shaped body formed into a rod shape (in the present embodiment). Is a cylindrical body).

Next, in this state, heat is applied to the entire biaxially stretched heat-shrinkable film 11 to perform heat-shrink processing. When heat is applied to the entire biaxially stretched heat-shrinkable film 11, the electric wire bundle 10
As shown in FIG. 4, the portion of the outer peripheral surface 10A of the wire bundle coated with the biaxially stretched heat-shrinkable film 11 tightly covers the outer peripheral surface 10A of the wire bundle 10 with the outer peripheral surface 10B on the ring side. On the other hand, both ends of the cylinder of the biaxially stretched heat-shrinkable film 11 are subjected to heat and shrink by heat, so as to cover the outer peripheral surface of the jig 17 for forming a heat-shrinkable film, as shown in FIG.

In this state, when the jig 17 for forming a heat-shrinkable film attached to the ring-shaped hole 12 of the wire bundle 10 is removed from the hole 12 of the wire bundle 10, FIG.
As shown in FIG. 7, a product intermediate 18 is formed in which both ends of the biaxially stretched heat-shrinkable film 11 are formed in a cylindrical shape having the same diameter as the outer diameter of the jig 17 for forming a heat-shrinkable film. When the product intermediate 18 is formed, both ends of the cylinder of the biaxially stretched heat-shrinkable film 11 of the product intermediate 18 are heated while applying heat to both ends of the cylinder. 12 and heat shrink again. By doing so, the heat-shrinkable film-wrapped bundled electric wire 14 shown in FIG. 1 can be obtained.

In the heat-shrinkable film-wrapped bundled wire 14 shown in FIG. 1, the gap 13 is formed so that the ends of the biaxially stretched heat-shrinkable film 11 wrapping the surface of the ring inner peripheral surface 10C are not overlapped. This is because the length of both ends of the cylinder of the biaxially stretched heat-shrinkable film 11 is reduced by folding both ends of the cylinder of the biaxially stretched heat-shrinkable film 11 into the hole 12 of the electric wire bundle 10 and thermally shrinking. In this case, both ends of the cylinder of the biaxially stretched heat-shrinkable film 11 are set so as not to overlap each other.

After heat-shrinking the biaxially stretched heat-shrinkable film 11, the ring-shaped hole 12 of the wire bundle 10 is formed.
The jig 17 for forming the heat shrinkable film which is mounted on the intermediate product 18 is removed to form a product intermediate 18 as shown in FIG. 5, and heat is applied to both ends of the cylinder of the biaxially stretched heat shrinkable film 11 of the product intermediate 18. Both ends of the cylinder of the biaxially stretched heat-shrinkable film 11 are folded into the holes 12 of the electric wire bundle 10, and the widthwise ends of the folded biaxially stretched heat-shrinkable film 11 are overlapped with each other to form an overlapped portion 19. Then, when heat shrinking is again performed, a heat-shrinkable film-wrapped bundled wire 20 as shown in FIG. 6 can be obtained. The heat-shrinkable film-wrapped bundled wire 20 is different from the heat-shrinkable film-wrapped bundled wire 14 shown in FIG. They are formed without gaps so as to overlap each other.
Moreover, the ends of the superposed biaxially stretched heat-shrinkable films 11 in the width direction are not fused but merely stretched by heat shrinkage.

As described above, according to the heat-shrinkable film-wrapped bundled wire 20 shown in FIG.
The ends of the film in the width direction are overlapped with each other so that a gap is not formed and heat shrinkage is performed so that the surface of the ring inner peripheral surface 10C of the wire bundle 10 is not exposed to the outside. Adhesion of dust, oil, water, and the like can be prevented, and even when the bundled electric wire 10 is handled with bare hands, the film end of the biaxially stretched heat-shrinkable film 11 does not sharply hit the skin.

Further, according to the heat-shrinkable film-wrapped bundled electric wire 20 shown in FIG. 6, the heat-shrinkage of the biaxially stretched heat-shrinkable film 11 is performed only by overlapping the film ends in the width direction so that no gap is formed. Since the heat-sealed part is not formed, the wires can be easily taken out after the binding band is unwound, and the used wires can be stored without dislodging. In addition, the handleability can be improved.

[0030]

The present invention is configured as described above, and has the following effects.

According to the method for packaging a heat-shrinkable film of a bundled wire according to the first aspect, it is possible to prevent dust, dust, oil, water and the like from directly adhering to the wire bundle, and to handle the bundled wire with bare hands. Even when handled, the film edge does not hit the skin sharply, the wires can be easily taken out after unwrapping the binding band, the used wires can be stored without dislodging, and the bundle shape does not collapse It is possible to obtain a wound wire in which the entire peripheral surface of the wire bundle is wrapped with a heat-shrinkable film that can be easily carried and handled.

According to the heat-shrinkable film packaging method for a bundled wire according to the second aspect, dust, dust, oil, water, etc. can be prevented from directly adhering to the wire bundle, and the bundled wire can be handled with bare hands. Even when handled, the film edge does not hit the skin sharply, the wires can be easily taken out after unwrapping the binding band, the used wires can be stored without dislodging, and the bundle shape does not collapse It is possible to obtain a wound wire in which the entire peripheral surface of the wire bundle is wrapped with a heat-shrinkable film that can be easily carried and handled.

According to the method for packaging a heat-shrinkable film of a bundle of electric wires according to the third aspect, the outer peripheral surface and both side surfaces of the electric wire bundle are wrapped, and both ends of the cylindrical biaxially stretched heat-shrinkable film are heated in a cylindrical shape. It can be held in a contracted state, and both ends of the tubular biaxially stretched heat-shrinkable film can be easily folded into the inner peripheral surface of the hole of the wire bundle.

According to the heat-shrinkable film packaging method for a bundled wire according to the fourth aspect, both ends of the cylindrical biaxially stretched heat-shrinkable film are securely adhered to the inner peripheral surface of the hole portion of the wire bundle. Can be packaged.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a heat-shrinkable film-wrapped bundled electric wire manufactured by the method of packaging a heat-shrinkable film of a bundled electric wire according to the present invention.

FIG. 2 shows a method of wrapping the heat-shrinkable film of the heat-shrinkable film-wrapped wire bundle shown in FIG. 1 in a state where a biaxially stretched heat-shrinkable film is coated on the outer peripheral surface of a ring of the wire bundle. FIG.

FIG. 3 is a view showing a state in which a jig for forming a heat-shrinkable film is attached to a hole of a wire bundle coated with the biaxially stretched heat-shrinkable film shown in FIG.

FIG. 4 is a view showing a state in which the biaxially stretched heat-shrinkable film shown in FIG. 3 is thermally shrunk.

5 is a perspective view showing a product intermediate in a state where a jig for forming a heat-shrinkable film is pulled out from a hole of a wire bundle obtained by heat-shrinking the biaxially stretched heat-shrinkable film shown in FIG.

FIG. 6 is an overall perspective view of a heat-shrinkable film-wrapped bundled electric wire showing another embodiment manufactured by the method for packaging a heat-shrinkable film of a bundled electric wire according to the present invention.

FIG. 7 is a plan view of a conventional heat-shrinkable film-wrapped bundled electric wire.

FIG. 8 is a sectional view taken along line AA of FIG. 7;

[Explanation of symbols]

 10 Wire bundle 10A Ring outer surface 10B Ring side peripheral surface 10C Ring inner peripheral surface 11 Biaxial stretching heat shrinkage Film 12 ...... Hole 13 ...... Gap 14 ...... Heat-shrinkable film-wrapped bundled wire 16 ... ...... Joining part 17 ... Heat-shrink Film molding jig 18 Product intermediate 19 Overlapping part 20 Heat-shrinkable film-wrapped bundled wire

Claims (4)

[Claims] 1. A biaxially stretched heat-shrinkable film is coated on the outer peripheral surface of a ring of a wire bundle wound in a ring shape in a cylindrical shape, and a joining portion of the biaxially stretched heat-shrinkable film is heat-fused into a cylindrical shape. After forming and heat shrinking, the outer peripheral surface of the ring and the outer peripheral surface of the ring side of the wire bundle are wrapped, and both ends of the tubular biaxially stretched heat-shrinkable film are held in a tubular shape while being thermally shrunk. The heat-shrinkage of a bundled wire is characterized in that both ends of the tube of the biaxially stretched heat-shrinkable film are folded into the holes of the wire bundle and heat-shrinked again to wrap the entire peripheral surface of the wire bundle. Film packaging method. 2. A biaxially-stretched heat-shrinkable film is coated on the outer peripheral surface of a ring of a wire bundle wound in a ring shape in a cylindrical shape, and a joining portion of the biaxially-stretched heat-shrinkable film is heat-fused into a cylindrical shape. After forming, a jig for molding a heat-shrinkable film which is formed into a cylindrical shape having substantially the same diameter as the ring-shaped hole of the wire bundle is attached to the hole of the wire bundle, and the biaxially stretched heat-shrinkable film is heated. Shrink to form a product intermediate of the heat-shrinkable film-wrapped bundled wire, and then remove the jig for forming the heat-shrinkable film from the hole of the wire bundle, and form a tube of the tubular biaxially stretched heat-shrinkable film. A method for packaging a heat-shrinkable film of a bundled wire, wherein both end portions are folded into holes of the wire bundle and heat-shrinked again to package the entire peripheral surface of the wire bundle. 3. The heat-shrinkable film forming jig, wherein the intermediate product is tightly packaged on a ring outer circumferential surface and a ring-side circumferential surface of the wire bundle, and both end portions of the cylindrical biaxially stretched heat-shrinkable film are formed. The heat-shrinkable film packaging method for a bundled wire according to claim 2, wherein the heat-shrinkable film is formed into a tubular shape along a line. 4. The method according to claim 1, wherein the folding of the hole of the wire bundle into the inner peripheral surface of the ring at both ends of the tubular biaxially stretched heat-shrinkable film is performed while heating. The method for packaging a heat-shrinkable film of a bundled wire according to the above.