JP2015090812A - Wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make thick wire hard to bend easy to bend.SOLUTION: In a thick wire coated by an insulation coating layer with a core wire of cross section area of 8 mmor more with thickness of 0.9 mm or more, and having bend radius of 30 mm or more, an easy bent part is arranged by cutting the insulation covering layer from an outer periphery on a part in a length direction to have bend radius of the easy bend part of 15 mm or less.

Description

  The present invention relates to an electric wire, and in particular, a large-diameter electric wire (so-called thick electric wire) arranged in a vehicle can be bent with a small bending radius so that the electric wire can be attached with high accuracy along an installation path having a bending region. At the same time, it is intended to reduce the space during transportation and storage.

Wire harnesses that are routed in vehicles are configured by concentrating many types of electric wires, and the most widely used electric wires are circular cross-sections in which a core wire made of conductive metal is covered with an insulating coating made of insulating resin. It consists of a covered electric wire. The sizes of these covered electric wires are classified into small-diameter thin wires, medium-diameter medium wires, and large-diameter thick wires, and thick wires usually have a core wire cross-sectional area of 8 mm ² (so-called 8 sq) or more. It refers to an electric wire, and the core wire cross-sectional area reaches about 100 mm ^{2 for} a very thick electric wire. In the case of a covered electric wire, when the core wire cross-sectional area is increased, the thickness of the insulation coating is also increased. When the minimum core wire cross-sectional area is 8 mm ^{2 in} the section of the thick wire, the thickness of the annular insulating cover layer is 0.9 mm. It becomes.

Among the thick wires, even the smallest wire with a core cross-sectional area of 8 mm ² has a large bending radius and a large bending reaction force. Therefore, as shown in FIG. Is big. Therefore, if a thick wire in the wire group constituting the wire harness is included, it is not easy to bend and wire the wire harness along the route by the thick wire, There is a problem that the assemblability deteriorates.
Further, as shown in FIG. 5B, the wire harness 105 is stored and transported by being housed in a resin storage and transport case 110 (so-called luggage basket) having a required size. At that time, the wire harness 100 includes the thick wire 100 together with the thin wire 101 and the medium wire 102, the length of the thick wire 100 is larger than the length of the case 110 for storage and conveyance, and the wire harness 100 is bent. If it cannot be performed easily, the wire harness will not fit in the case 110 for storage and conveyance, and will protrude. Therefore, there is a problem that the storage and transport cases 110 containing the wire harnesses cannot be stacked and stored and transported.

  In addition, regarding the case where a thick wire is mixed in the wire group constituting the wire harness, Japanese Patent Application Laid-Open No. 2001-298932 provides an invention relating to a holding structure of a thick wire and a thin wire, and Japanese Patent Application Laid-Open No. 2003-32823. In the publication, an invention relating to a method for peeling an insulation coating of a thick wire is provided. However, no invention has been provided in which the bendability of thick electric wires is a problem and the thick electric wires can be easily bent.

JP 2001-298932 A JP 2003-32823 A

  As described above, since a thick electric wire cannot be bent easily, there is also a problem that a space is taken for transport and storage of the wire harness including the thick electric wire. In addition, not only the wire harness but also a thick electric wire is stored and transported, there is a problem that it takes up space because the bendability is poor.

  An object of the present invention is to solve the above-described problem, and it is an object of the present invention to make it easy to bend a thick electric wire that is difficult to bend and accommodate it in a case that is used as a luggage basket during storage and transportation. .

In order to solve the above problems, the present invention provides a thick wire in which a core wire having a cross-sectional area of 8 mm ² or more is covered with an insulating coating layer having a thickness of 0.9 mm or more and a bending radius is set to 30 mm or more. Provided is an electric wire characterized in that an easy-bending part obtained by cutting the insulating coating layer from the outer periphery is provided in a part of the direction, and the bending radius of the easy-bending part is 15 mm or less.

  As described above, in order to solve the problem that the thick electric wire of the present invention is difficult to bend, at least a part of the thick electric wire in a short range in the length direction, an easily bent portion where all of the insulating coating layer is peeled, or An easy-bending portion that is thinned by cutting the insulating coating layer from the outer periphery to the middle position in the thickness direction in the entire circumferential direction is provided. In this way, the thick insulating coating layer, which is one of the factors of difficulty in bending, is eliminated or thinned to provide an easy-bending portion, and it is easy to fold at the easy-bending portion and further to bend 180 degrees. I can do it.

  The core wire of the thick electric wire is made of twisted strands of copper-based metal, aluminum-based metal or the like, but may be a single-core wire made of a conductive metal.

When the insulating coating layer is peeled off and cut off at the easy-bending part, an annular cut is made in the entire circumference by a cutter at both ends in the length direction to be the easy-bending part, and both-end cutting parts are provided. The entire length in the longitudinal direction is cut with a cutter, and the portion between the lengthwise cut portions is sandwiched between the cut portions at both ends, and the portion is cut out so as to peel off the insulating coating layer from the core wire.
When the insulating coating layer is cut from the outer periphery to the middle position in the thickness direction, the required thickness can be cut using a grinder (rotary grindstone) or the like.

  Specifically, the thick wire is an electric wire for a vehicle, and the easy-bend portion is exposed to a core wire by peeling the entire insulating coating layer in a length range of 50 mm to 150 mm at a required position in the length direction. The corrugated tube is bridged between the insulating coating layers on both sides sandwiching the core wire exposed portion, and both ends of the corrugated tube are wound and fixed to the insulating coating layer with an adhesive tape. It is preferable to use a structure covered with a tube.

As described above, when the insulation coating layer of the thick wire is peeled off within the required range, the skinning operation can be performed more easily than the part of the insulation coating layer in the thickness direction is cut, and the bending portion of the easy-bend portion is further bent. It can be made easier.
Moreover, since the core wire exposed portion exposed by peeling off the insulating coating layer is covered with the corrugated tube, the core wire can be protected and covered with the corrugated tube rich in flexibility and stretchability, so that the ease of bending is not reduced.

  In addition, instead of covering the core wire exposed portion, which is an easily bent portion, with a corrugated tube, it may be covered with a resin sheet such as a urethane sheet having good flexibility and waterproofness.

The easy-bending portion provided in the length direction of the thick electric wire may be provided in a portion that becomes a bent portion in a state of being routed to a vehicle and / or a portion that is bent to a length that can be accommodated in a case for transport and storage. preferable.
That is, if the length of the case for transporting and storing is 1 m, the easy-bending parts are provided with an interval of 1 m, the thick electric wires are bent at each easy-bending part, folded into two, three, etc. It can be accommodated in the case. Also, instead of providing the 1 m interval, if the distance between the bending positions is less than the length of the case (less than 1 m) in the state of being routed to the automobile, an easy-bending portion is provided at the bending position during routing. ing. Thereby, the thick electric wire which is hard to bend can be accurately bent at a bending angle along the routing path.

Furthermore, the present invention provides a wire harness routed in a vehicle including a thick electric wire having the easily bendable portion.
The wire harness may include a thin wire and / or a thin wire together with the thick wire.
In wire for automobiles, the fine product wire core cross-sectional area 0.1～1.25Mm ² or less, midsole wire core cross-sectional area is distinguished in less than 8 mm ² beyond the 1.25 mm ^2.

  As described above, the wire harness composed of a plurality of electric wires including the thick electric wire is provided with the easy-bending portion in the thick electric wire. Even if there is a bent part, if the easy-bending part of the thick wire is positioned at the bent part, the worker can perform a sharp bend along the bending path accurately and improve the workability of assembling the wire harness. be able to. Also, when housed in a cart for transportation and storage in the state of a wire harness, it is possible to fold thick wires so that they can fit inside the cage, and it is possible to store the baskets one above the other. There is an advantage not to take.

As described above, the electric wire according to the present invention is an easily bent portion in which all of the insulating coating layer is peeled off in the short range of at least part of the length of the thick electric wire, or the thickness direction of the insulating coating layer from the outer periphery. An easy-bending portion that is thinned by cutting up to an intermediate position in the entire circumferential direction is provided. In this way, the thick insulating coating layer, which is one of the causes of bending difficulty, is eliminated or thinned to provide an easy-bending part, which is bent at the easy-bending part, and further bent by 180 degrees, so that it can be easily folded. To be able to.
In particular, if the core wire exposed part exposed by peeling off the insulating coating layer is covered with a corrugated tube, the core wire can be protected, and it is covered with a corrugated tube rich in flexibility and stretchability, so the bendability is not reduced. There are advantages.

(A) is a schematic top view which shows the wire harness containing the thick electric wire of 1st Embodiment of this invention, (B) is a partial front view of the wiring state to the motor vehicle of the said wire harness, (C) is the said It is a perspective view of the state where a wire harness was stored in a cart for transportation and storage. The thick electric wire is shown, (A) is a perspective view, (B) is a perspective view in a state where a corrugated tube is removed. It is drawing which shows the process sequence of the said thick wire. It is a perspective view which shows 2nd Embodiment. (A) and (B) are drawings showing conventional problems.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 3 show a thick wire 1 according to a first embodiment of the present invention.
The thick wire 1 constitutes a part of a plurality of wires 11 constituting a wire harness 10 routed in an automobile. There are a thin wire 12 and a medium wire 13 as other wires constituting the wire harness. Each of these electric wires 11 is a covered electric wire having a circular cross section in which a core wire 2 twisted with a copper-based metal element wire is covered with an insulating coating layer 3 made of an insulating resin. The core wire 2 of the electric wire 11 may be an aluminum electric wire instead of a copper electric wire.

The thick wire 1 has a core 2 having a cross-sectional area of 8 mm ² or more. Although an upper limit is not limited, the maximum core wire size of the thick electric wire currently used is about 100 mm < ² >. The thickness t of the insulating coating layer 3 covering the outer periphery of the core wire 3 having a cross-sectional area of 8 mm ² is about 0.9 mm. The bending radius of the thick wire 1 is 30 mm or more, and the operator cannot easily fold it in half by 180 degrees manually, and even if it is folded in two, the bending back is large and it cannot be held in a folded state.
Incidentally, the fine material wire 12 is wire cross-sectional area 0.1～1.25Mm ² or less, midsole wire 13 is distinguished as less than 8 mm ² core cross-sectional area beyond the 1.25 mm ^2.

  As shown in FIG. 2 (B), the thick wire 1 is provided with an easily bent portion 5 having a length dimension L of 50 to 150 mm. In addition, the easy-bending portion 5 is spaced by a distance L3 in the length direction (about 1 m in this embodiment) so that it can be accommodated in the case 20 having a length L1 made of resin for conveyance and storage shown in FIG. Is provided. In addition, when the wire harness is routed to the automobile as shown in FIG. 1B and the abrupt bending position Z is less than the length L3, the easy-bend portion 5 is placed at a position less than the length L3. Provided.

  As described above, the easily bendable portion 5 has a length L (50 mm to 150 mm), and as shown in FIGS. 2 and 3, the insulating coating layer 3 is peeled over the entire circumference to expose the core wire 2, and the core wire An exposed portion 2r is provided. The corrugated tube 6 is bridged between the insulating coating layers 3a and 3b on both sides of the core wire exposed portion 2r, and both ends of the corrugated tube 6 are wound and fixed to the insulating coating layers 3a and 3b with adhesive tapes 7 and 7. Yes. Thereby, the easy-bending part 5 which provided the space | gap and covered the corrugated tube 6 in the outer periphery of the core wire exposed part 2r is provided.

  The core wire exposed portion 2r is made by the same method as the intermediate peeling performed when a conventional intermediate splice is provided. That is, both ends in the length direction of the portion to be easily bent portion 5 are provided with a circular cut on the entire circumference with a cutter to provide a cut on both ends, and the entire length in the length direction between the cut ends is cut with a cutter. The part of the insulating coating layer 3 is cut off from the core wire 2 by being sandwiched between the cut portions in the length direction and the cut portions at both ends.

  The corrugated tube 6 is a general-purpose resin molded product, annular crests 6a and troughs 6b are alternately arranged in the length direction, and a slit 6s is provided in the entire length in the length direction. The slit 6s is opened and covered from the lateral direction to the core wire exposed portion 2r, and both ends thereof are externally fitted to the outer periphery of the insulating coating layers 3a and 3b, and the adhesive tapes 7 and 7 are wound and fixed as described above. .

  Since the corrugated tube 6 is flexible and stretchable, it does not hinder the ease of bending of the easily bent portion 5. Thus, the easy-bending part 5 is made easy to bend by stripping the insulating coating layer 3 and covering the core wire exposed part 2r with the corrugated tube 6. The easy-bend portion 5 has a bending radius of 15 mm or less, can be easily folded by being bent by 180 degrees, and hardly bends back, thereby giving the thick wire 1 flexibility.

  Thus, since the easy bending part 5 is provided in the thick electric wire 1, as shown in FIG.1 (B), in the state wired to the motor vehicle, it is thick in the rapid bending part Z along the wiring path | route. If the easy bending part 5 of the electric wire 1 is located, it can route along the rapid bending part Z of a wiring path | route correctly. As a result, since the thick wire 1 is difficult to bend, it is not necessary to wire the wire harness 10 with a large curve.

  Further, the wire harness 10 assembled in the wire harness assembly line is accommodated in the case 20 in order to transport and store it to the automobile assembly line. At that time, the wire harness 10 can be accommodated without protruding from the case 20 by folding the thick electric wire 1 into the folded state at the easily bendable portion 5. As a result, the case 20 can be transported and stored in a stacked manner, and there is an advantage that it does not take up space.

FIG. 4 shows a thick wire of the second embodiment.
The bendable portion 50 provided on the thick wire 1 cuts the insulating coating layer 3 from the outer periphery to the middle position in the thickness direction, leaving the inner peripheral side of the insulating coating layer 3, and increasing the thickness of the insulating coating layer 3 to 1. / 2 to 1/3. The outer peripheral side of the insulating coating layer 3 can be cut using a grinder (rotary grindstone) or the like. The length L of the easily bent portion 50 is the same as that of the first embodiment, but may be shorter than that of the first embodiment.

Since the easily bent portion 50 leaves the insulating coating layer 3, it is not covered with a corrugated tube. If the entire wire harness 10 including the thick electric wire 1 provided with the easy-bending part 50 is externally protected with a corrugated tube, the same function as when the easy-bending part 50 is protected with a corrugated tube can be obtained. Thereby, the easy-bending part 50 which made the insulation coating layer 3 of the thick wire 1 thin is protected by the corrugated tube, does not come into contact with the external interference material, and is not damaged.
Since other configurations and operations are the same as those of the first embodiment, description thereof is omitted.

DESCRIPTION OF SYMBOLS 1 Thick electric wire 2 Core wire 2r Core wire exposure part 3 Insulation coating layer 5 Easy bending part 6 Corrugated tube

Claims (4)

In a thick electric wire in which a core wire having a cross-sectional area of 8 mm ² or more is covered with an insulating coating layer having a thickness of 0.9 mm or more and a bending radius is set to 30 mm or more, the insulating coating layer is arranged on a part of the length direction. An electric wire characterized in that it is provided with an easy-bending portion excised from the wire, and the bending radius of the easy-bending portion is 15 mm or less.   The thick wire is an electric wire for a vehicle, and the easy-bend portion is provided with a core wire exposed portion by peeling the entire insulating coating layer in a length range of 50 mm to 150 mm at a required position in the length direction, A structure in which a corrugated tube is bridged between insulating coating layers on both sides sandwiching the core wire exposed portion, both ends of the corrugated tube are wound and fixed to the insulating coating layer with an adhesive tape, and the core wire exposed portion is covered with the corrugated tube. The electric wire according to claim 1.   The easy-bending portion provided in the length direction of the thick wire is provided in a portion that becomes a bent portion in a state of being routed to a vehicle and / or a portion that is bent to a length that can be accommodated in a case for transport and storage. The electric wire according to claim 1 or claim 2.   The wire harness routed in the vehicle containing the thick electric wire provided with the said bendable part of Claim 1 thru | or 3.

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