JP2006168774A - Bundled wire - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bundled wire which is hardly affected by dust or the like during carriage and storage, and can be easily taken out even if the winding amount of the wire bundle is reduced. <P>SOLUTION: In the bundled wire 11, the outer surface of a wire bundle 13 with a wire 12 wound therearound except the inner circumferential surface 14 of the wire bundle is covered with a heat-shrinkable film 15, the inner circumferential edge 16 of the heat-shrinkable film 15 is brought close to the axis of the wire bundle 13, and the diameter of the inner circumferential edge 16 is set to be smaller than the diameter of the inner circumferential surface 14. Concentric perforations 22 are formed in the heat-shrinkable film 15 from an axis to form a removable part 19 capable of removing the inner side of the perforations 22. In addition, regarding the position of the perforations 22, when the wire 12 is drawn out with the winding amount of the wire bundle 13 reduced and the removable part 19 removed, the wire 12 is located at the position so as not to be hooked by the inner circumferential edge after the removal of the removable part 19. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a bundled electric wire such as a VVF electric wire and an IV electric wire, and more particularly to a bundled electric wire in which the electric wire bundle is wrapped with a heat-shrinkable film.

  In order to prevent contamination and the like during transportation and storage of an electric wire bundle formed by winding an electric wire, a bundled electric wire in which the electric wire bundle is covered and wrapped with a heat-shrinkable film is used. As the bundled electric wire, one disclosed in Patent Document 1 below is known.

In FIG. 2, a bundled electric wire 1 disclosed in Patent Document 1 below is manufactured by covering and packaging the outer surface of the electric wire bundle 2 except for the inner peripheral surface 3 with a heat-shrinkable plastic sheet 4. More specifically, after covering the outer circumference of the wire bundle 2 with a heat-shrinkable plastic sheet 4 wider than the thickness of the wire bundle 2, the overlapping portion of the ends of the heat-shrinkable plastic sheet 4 is covered. When the sheet connecting portion 5 is formed by heat fusion and finally the heat-shrinkable plastic sheet 4 is heated to cause heat shrinkage, the production of the bundled electric wire 1 as shown in FIG. 2 is completed. It is supposed to be.
Japanese Patent No. 2903460 (Page 2, Fig. 2)

  By the way, in the said prior art, it has the problem that the electric wire 6 pulled out from the bundled electric wire 1 will be hooked in the inner peripheral part 7 of the heat-shrinkable plastic sheet 4 in the case of construction in a field. Yes. This is because, in particular, when the winding amount of the electric wire bundle 2 is reduced, the sheet connecting portion 5 is cut by pulling out the electric wire 6, and the electric wire 6 is caught in this portion. Of course, if the electric wire 6 is caught, it becomes difficult to perform the construction.

  The present invention has been made in view of the above-described circumstances, makes it difficult to be affected by dust and the like during transportation and storage, and allows the wire to be easily taken out even if the winding amount of the wire bundle decreases. It is an object to provide a bundled electric wire.

  The bundled electric wire of the present invention according to claim 1, which is made to solve the above-described problem, covers the outer surface of the electric wire bundle formed by winding the electric wire except for the inner peripheral surface with a heat-shrinkable film, and the heat shrinkage. The inner peripheral edge of the conductive film is brought closer to the central axis of the wire bundle, the diameter of the inner peripheral edge is made smaller than the diameter of the inner peripheral surface, and the heat shrinkable film is concentrically shaped from the central axis. A perforation is provided so that the inside of the perforation can be removed. Further, with respect to the position of the perforation, the wire in a state where the winding amount of the wire bundle is reduced and the removal portion is removed. When the wire is pulled out, the electric wire is positioned so as not to be caught on the inner peripheral edge portion after the removal portion is removed.

  According to the present invention having such a feature, even when the winding amount of the wire bundle is reduced by drawing out the wire, it is possible to prevent the wire from being caught by removing the removing portion. The removal portion is formed in the minimum necessary range, and is therefore less susceptible to dust and the like. An example of the removal portion is a range from the inner peripheral edge portion to at least the wire bundle.

  The bundled electric wire according to a second aspect of the present invention is the bundled electric wire according to the first aspect, wherein the ratio of the cut length at the perforation to the length without cut is set to 30 mm: 30 mm to 30 mm: 35 mm. It is a feature.

  According to the present invention having such a feature, there is a perforation for the removal portion, but if the ratio of the notch length to the non-notch length in the perforation is 30 mm: 30 mm to 30 mm: 35 mm, it is transported. Even if friction is sometimes generated between the heat-shrinkable film and the pallet or the like, it is possible to prevent the heat-shrinkable film from tearing from the perforation. Moreover, it becomes possible to avoid the case where it becomes difficult to remove the removal portion.

  According to the first aspect of the present invention, it is difficult to be affected by dust and the like during transportation and storage, and the electric wire can be easily taken out even if the winding amount of the electric wire bundle is reduced. Play.

  According to the second aspect of the present invention, there is an effect that the heat-shrinkable film can be prevented from being damaged during transportation. Moreover, there exists an effect that a removal part can be removed easily.

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

  In FIG. 1, a bundled electric wire 11 of the present invention is manufactured by covering the outer surface of a wire bundle 13 formed by winding an electric wire 12 with a heat-shrinkable film 15 in a substantially donut shape. . The diameter of the inner peripheral edge 16 of the heat shrinkable film 15 is set to be smaller than the diameter of the inner peripheral surface 14 of the wire bundle 13. That is, the inner peripheral edge 16 of the heat-shrinkable film 15 is set closer to the central axis of the electric wire bundle 13 than the inner peripheral surface 14 of the electric wire bundle 13. Since the heat-shrinkable film 15 is disposed so that the inner peripheral edge portion 16 is close to the central axis, the bundled electric wire 11 has a structure in which dust or the like is not easily attached thereto.

  The heat-shrinkable film 15 is a so-called shrink film made of polyethylene, polypropylene, polyethylene terephthalate or the like, and has a predetermined thickness and has the characteristics shown in Table 1 below. The heat-shrinkable film 15 is wider than the thickness of the wire bundle 13, and after covering the outer circumferential portion 17 of the wire bundle 13, the overlapping portion of the ends of the heat-shrinkable film 15 is covered. The film joining portion 18 is formed by integration by heat fusion, and finally, the wire bundle 13 is covered and packaged by heating to cause heat shrinkage.

  Such a heat-shrinkable film 15 is provided with a removing portion 19. The remover 19 is provided in a portion that covers the upper surface 20 and the lower surface 21 of the wire bundle 13. Specifically, a concentric perforation 22 is provided on the heat-shrinkable film 15 from the center point, and the inside of the perforation 22 is used as the removal portion 19. The removal part 19 is formed so that it can be removed from the perforation 22 as necessary.

  Here, the position of the perforation 22 will be described. The perforation 22 is a wire even when the wire 12 is pulled out in a state in which the winding amount of the wire bundle 13 is reduced and the removal portion 19 is removed. 12 is set so as not to be caught on the inner peripheral edge after removal of the removal portion 19. More specifically, a perforation 22 is provided at a position about 4 cm to 5 cm from the inner peripheral edge portion 16 of the heat-shrinkable film 15 (a place where it reaches at least the wire bundle 13 from the inner peripheral edge portion 16) (this embodiment). The thickness of the bundled electric wire 11 is, for example, 7 cm).

  As shown in FIG. 1 (c), the perforation 22 is a broken line-like cut (slit-like cut), and the ratio between the cut length L1 and the non-cut length L2 at the perforation 22, L1: L2. Is in the range of 30 mm: 30 mm to 30 mm: 35 mm. The ratio between the cut length L1 and the non-cut length L2 is obtained from the experimental results shown in Table 2.

  According to the experimental results shown in Table 2, the ratio of the cut length L1 to the length L2 without cut, the result of “removal ×” when L1: L2 is 20 mm: 30 mm, 30 mm: 20 mm, and 30 mm: 25 mm. Is out. This is because the removal part 19 is difficult to remove or the remaining film is deformed. From the experimental results, it has been found that if the cut length L1 is short, or if the length L2 without cut is short, the above-mentioned problem is caused.

  On the other hand, when the ratios L1: L2 are 30 mm: 40 mm and 40 mm: 20 mm, the result of “film break” is obtained. This is because friction occurs between the heat-shrinkable film 15 and the pallet or the like during transportation, causing a problem that the heat-shrinkable film 15 is torn from the perforation 22. It was found from experimental results that a long cut length L1 causes such a problem.

  The good ratio L1: L2 is the case of 30 mm: 30 mm and 30 mm: 35 mm, and it is difficult to remove the removing portion 19 or the remaining film is deformed, or the heat shrinkable film 15 due to friction. There was no problem with tearing. Therefore, when the ratio L1: L2 is in the range of 30 mm: 30 mm to 30 mm: 35 mm, the occurrence of the above various problems can be prevented.

  As described above, the bundled electric wire 11 of the present invention is less susceptible to dust and the like during transportation and storage, and can easily take out the electric wire 12 even if the winding amount of the electric wire bundle 13 decreases. Can do. Moreover, the bundled electric wire 11 of this invention can prevent the damage of the heat-shrinkable film 15 at the time of conveyance. Furthermore, the bundled wire 11 of the present invention can easily remove the removal portion 19.

  In addition, it goes without saying that the present invention can be variously modified without departing from the spirit of the present invention.

(A) is a perspective view which shows one Embodiment of the bundled electric wire of this invention, (b) is sectional drawing of a bundled electric wire, (c) is explanatory drawing to which the perforation was expanded. (A) is a perspective view of the bundled electric wire of a prior art example, (b) is sectional drawing of the bundled electric wire of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Bundled electric wire 12 Electric wire 13 Electric wire bundle 14 Inner peripheral surface 15 Heat-shrinkable film 16 Inner peripheral edge portion 17 Outer circumferential portion 18 Joint portion 19 Removal portion 20 Upper surface 21 Lower surface 22 Perforation L1 Cut length L2 Cut length

Claims (2)

The outer surface excluding the inner peripheral surface of the wire bundle formed by winding the electric wire is covered with a heat-shrinkable film, and the inner peripheral edge of the heat-shrinkable film is brought close to the central axis of the electric wire bundle, The diameter is smaller than the diameter of the inner peripheral surface, and a concentric perforation is provided on the heat-shrinkable film from the central axis to provide a removal portion capable of removing the inside of the perforation, Further, regarding the position of the perforation, when the wire is pulled out in a state where the winding amount of the wire bundle is reduced and the removal portion is removed, the wire is not caught on the inner peripheral edge portion after the removal portion is removed. A bundled electric wire characterized by its position. In the bundled electric wire according to claim 1,
A bundled electric wire characterized in that a ratio of a cut length and a length without cut at the perforation is 30 mm: 30 mm to 30 mm: 35 mm.

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