JP2005075588A - Bundled electric wire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bundled electric wire enabling the secure cutting of an electric wire bundle packaging member without using a cutter knife. <P>SOLUTION: This bundled electric wire 11 comprises a cylindrically wound electric wire bundle 12 and the electric wire bundle packaging member 13 for packaging the electric wire bundle 12. A breakage part 17 for exposing the electric wire bundle 12 is formed in the electric wire bundle packaging member 13. The breakage part 17 is disposed and formed near a joining portion 16 where the end parts of the electric wire bundle packaging member 13 are overlappingly joined to each other. The breakage part 17 is disposed and formed within 10 mm on either of both sides of the joining portion 16. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a bundled electric wire provided with a cylindrical electric wire bundle and an electric wire bundle packaging member having a fracture portion.

  IV wires and VVF wires are used for wiring in homes, buildings, factories, and the like. These electric wires are generally used as bundled electric wires that are wound in a cylindrical shape and bundled for ease of storage, transportation, and handling during use.

  As shown in FIG. 2, the conventional bundled electric wire 1 has a wire bundle 3 formed by winding the wires 2 in a cylindrical shape and bundling them, and prevents protection and breakage of the wire bundle 3 during storage and transportation. In order to do so, it is provided with a heat shrink film (wire bundle wrapping member) 4 for covering and packaging the wire bundle 3 (see, for example, Patent Document 1).

  Except for the cylindrical inner peripheral surface of the wire bundle 3, it is covered with a heat shrink film 4. In such a heat-shrinkable film 4, four break lines (break portions) that are radial from the center point of the wire bundle 3 are formed at equal intervals.

The break line 5 is formed to expose the wire bundle 3. That is, if the heat-shrinkable film 4 is broken to a desired position along the breaking line 5, the wire bundle 3 can be easily exposed. The break line 5 is formed in order to break the heat shrink film 4 to a desired position without using a cutter knife or the like that leads to damage to the wire bundle 3.
JP 2001-199489 A (page 3, FIG. 1)

  By the way, in the above prior art, when a force is applied to the film end where the break line 5 is located, the force is dispersed due to the material of the heat shrink film 4, and the heat shrink film 4 is broken. There was a case where it was not possible to break along 5. For this reason, the heat shrink film 4 has to be broken using a cutter knife or the like even though the break line 5 is present.

  This invention is made | formed in view of the situation mentioned above, and makes it a subject to provide the bundled electric wire which can fracture | rupture an electric wire bundle packaging member reliably, without using a cutter knife etc.

  The bundled electric wire of the present invention according to claim 1, which has been made to solve the above problems, comprises an electric wire bundle wound in a cylindrical shape and an electric wire bundle packaging member for wrapping the electric wire bundle, and the electric wire bundle A bundled electric wire in which a rupture portion for exposing the electric wire bundle is formed on the wrapping member, and the rupture portion is disposed and formed in the vicinity of a joining portion where the ends of the electric wire bundle wrapping member are overlapped and joined. It is characterized by that. According to the present invention having such a feature, the force for breaking the wire bundle packaging member is easily concentrated on the broken portion. That is, by disposing and forming the rupture portion in the vicinity of the joint portion, the force for rupture becomes difficult to be dispersed. According to the present invention, the wire bundle packaging member can be reliably broken without using a cutter knife or the like and without paying attention to the breaking direction. In addition, since it is not necessary to use a cutter knife etc., damage to an electric wire bundle is prevented.

  The bundled electric wire according to a second aspect of the present invention is characterized in that, in the bundled electric wire according to the first aspect, the fracture portion is disposed and formed on either side within 10 mm on both sides of the joint portion. According to the present invention having such a feature, the force for breaking the wire bundle packaging member is surely concentrated on the broken portion.

  According to the present invention described in claim 1, there is an effect that the wire bundle packaging member can be reliably broken without using a cutter knife or the like.

  According to the second aspect of the present invention, there is an effect that the wire bundle packaging member can be more reliably broken.

  Hereinafter, description will be given with reference to the drawings. FIG. 1 is a perspective view showing an embodiment of a bundled electric wire according to the present invention.

  In FIG. 1, reference numeral 11 denotes a bundled electric wire of the present invention. The bundled electric wire 11 includes an electric wire bundle 12 and an electric wire bundle packaging member 13. Hereinafter, each component will be described in detail.

  The wire bundle 12 is formed by, for example, winding a wire 14 such as a VVF wire in a cylindrical shape and bundling it. More specifically, the electric wire bundle 12 is formed by winding an electric wire 14 having a predetermined length (for example, 100 m) into a donut shape in plan view. Is formed.

  The wire bundle 12 is wound around the inner peripheral surface of the cylinder facing the hollow portion 15 so that the inner end (not shown) of the wire 14 comes. Further, the outer end (not shown) of the electric wire 14 is wound around the cylindrical outer peripheral surface side of the electric wire bundle 12. The wire bundle 12 can draw the wire 14 from the hollow portion 15.

  The wire bundle packaging member 13 is a member that covers and wraps the wire bundle 12 except for the inner circumferential surface of the cylinder. In this embodiment, a shrink film (heat shrink film) is used. In general, when a polymer film is uniaxially stretched or biaxially stretched, the molecules are oriented in the direction of stretching (stretching direction). When the polymer film is stretched in this way, the molecular orientation is oriented by stretching. The stress is relaxed and shrinks to return to the state of the polymer film before stretching. The above shrink film utilizes this property.

  The above shrink film is obtained by stretching a thermoplastic film (polymer film) made of a polymer resin such as PET, PE, PP, etc. at an appropriate temperature and cooling in that state, so that the molecular chain is in the stretching direction. It is oriented and fixed in shape, and then returns to its original dimensions when reheated.

  The shrink film which is the wire bundle packaging member 13 of this embodiment is a uniaxial contraction type, shrinks only in the outer circumferential direction of the wire bundle 12 and covers the cylindrical outer peripheral surface and the upper and lower surfaces of the wire bundle 12. It has become. Reference numeral 16 indicates a joined portion in which the ends of the wire bundle packaging member 13 are overlapped and joined together (here, heat fusion, thermocompression bonding, or adhesion by an adhesive may be used).

  In the vicinity of the joint portion 16 of the wire bundle packaging member 13, for example, a perforated fracture portion 17 is formed along the joint portion 16. Although two broken portions 17 are shown in the figure, they are arranged and formed on either side within 10 mm on both sides of the joint portion 16 (two are not excluded. Within 10 mm is a preferred range. To do).

  The breaking portion 17 is formed to expose the wire bundle 12. That is, the electric wire bundle 12 can be easily exposed by breaking the electric wire bundle packaging member 13 to a desired position along the breaking portion 17. The breaking portion 17 is arranged and formed in the vicinity of the joining portion 16 in order to reliably break the wire bundle packaging member 13 to a desired position without using a cutter knife or the like that leads to damage to the wire bundle 12.

  In the above configuration, when a force is applied so that the film end of the wire bundle wrapping member 13, that is, the end of the joint portion 16, and a break is formed in the break portion 17, the force concentrates on the break portion 17 without being dispersed. As a result, the electric wire bundle packaging member 13 is reliably broken along the joint portion 16.

  According to the present invention in which one breaking portion 17 is arranged in the vicinity of the joint portion 16 where the concentrated force is most easily applied, the wire bundle packaging member 13 can be reliably broken to a desired position.

  In the present invention, the wire bundle packaging member 13 can be reliably broken to a desired position without using a cutter knife or the like. In addition to such effects, the wire bundle 12 can be prevented from being damaged. In addition, work efficiency can be improved because there is no need to pay particular attention to the breaking direction.

  In addition, it goes without saying that the present invention can be variously modified without departing from the spirit of the present invention. In the above description, a known binding band is not included in the configuration, but it is not limited to this.

It is a perspective view showing one embodiment of a bundled electric wire according to the present invention. It is a perspective view of the bundled electric wire of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Bundled electric wire 12 Electric wire bundle 13 Electric wire bundle packaging member 14 Electric wire 15 Hollow part 16 Joining part 17 Breaking part

Claims (2)

A bundled electric wire comprising an electric wire bundle wound in a cylindrical shape and an electric wire bundle wrapping member for wrapping the electric wire bundle, wherein the electric wire bundle wrapping member is formed with a broken portion for exposing the electric wire bundle. There,
A bundled electric wire characterized in that the rupture portion is arranged and formed in the vicinity of a joining portion where the ends of the wire bundle packaging member are overlapped and joined. In the bundled electric wire according to claim 1,
A bundled electric wire characterized in that the fracture portion is disposed and formed on either side within 10 mm on both sides of the joint portion.

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