JP2008130491A - Wire harness for bent portion structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To allow electrical wires to be bent naturally or smoothly, without broken within a limited space, even if each of the electrical wires has a lager diameter, to thereby improve the bend resistance of the electrical wires. <P>SOLUTION: At a bend portion 26<SB>1</SB>of a wire harness 14<SB>1</SB>constituted of a plurality of the electrical wires 25 formed into substantially a circle in section, the plurality of electrical wires are arranged, in a flat manner, flexible plates 27, 28 are arranged at both side of the flatly arranged electrical wires 24, both of the flexible plates are fixed to each other by means of bundling members 29; and the outer bend side flexible plate 27 is fixed to the wire harness by means of the bundling members. A small number of large-diameter electrical wires 36 are joint-connected to both ends of the flat electrical wires 35 composed of a plurality of small-diameter electrical wires 33, and then the flat electrical wires are in the thickness direction. Two of the flat electrical wires 35 are arranged in parallel with each other and are then fixed to each other by bundling members 39. Small-diameter electrical wires 38 are arranged, in a flat manner in between two of the flat electrical wires 35, and then a joint-connection is performed by joint terminals 41. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a bent part structure of a wire harness that is applied to power supply for an automobile door and that smoothly bends the wire harness without being bent as the door is opened and closed.

  FIG. 10 shows one form of an automobile door in which a conventional wire harness is routed (see Patent Document 1).

  This wire harness 80 is a flexible flat wire harness in which a plurality of small-diameter electric wires 81 are arranged in parallel and formed in a flat shape. The wire harness 80 is routed on the back surface of the synthetic resin inner panel 86 of the door 85, and The panel 86 projects from the front end to the vehicle body side, and a substantially U-shaped slack portion 82 is formed at the projecting portion. The slack portion 82 absorbs the opening / closing stroke of the door 83.

  The wire harness 80 has a connector 83 at the front end and a concentrated connector 84 at the rear end. The front end connector 83 is connected to a wire harness (not shown) on the vehicle body side (power supply side) and is connected to the rear end. The central connector 84 is connected to each lead-out wire from an auxiliary device such as a switch unit, a speaker, a door lock unit, a courtesy lamp, or an electrical component.

  The door inner panel 86 is assembled to the metal door outer panel 87 with the wire harness 80 routed, and the rear end side of the slack portion 82 of the wire harness 80 is positioned and supported in the groove 88 of the outer panel 87.

  FIG. 11 shows another form of an automobile door in which a conventional wire harness is routed (see Patent Document 2).

  This type door 62 is swingably supported on the vehicle body 70 by a single substantially rigid L-shaped support arm 71. In addition to the support arm 71, a pair of front and rear link arms 65, 66 are provided in parallel, and the base ends of the link arms 65, 66 are rotatably supported by the vehicle body 70 by a shaft portion 73. The tip of 66 is pivotally supported by a slider 64, and the slider 64 is slidably engaged with a horizontal guide rail 63 on the door side.

  A wire harness 68 is routed from the vehicle body side along the outer surface of the link arm 66 on the front side, fixed to the link arm 66 by a holder 72, and a caterpillar-shaped exterior member 69 following the slider 64 in the guide rail on the door side. Are introduced into the door while being bent into a substantially U-shape or J-shape, and are connected to auxiliary equipment and electrical components in the door. The right side in FIG. 11 is the vehicle front side.

  When the door 62 is fully closed, the support arm 71 and the link arms 65 and 66 rotate and extend forward, the slider 64 moves to the front end side of the guide rail 63, and one end of the wire harness 68 is bent of the exterior member 69. It is accommodated in the accommodation case 67 by operation. The wire harness 68 rotates together with the link arm 66 and bends in the vicinity of the shaft portion 73.

When the door 62 is fully opened, the link arms 65 and 66 maintain the door half-opened state of FIG. 11, the support arm 71 extends rearward, the slider 64 moves to the rear end side of the guide rail 63, and the wire harness 68 is externally mounted. It is pulled out backward together with the member 69.
Japanese Utility Model Publication No. 9-477 (FIG. 1) Japanese Patent Application Laid-Open No. 10-175483 (FIGS. 5 and 9)

  As a conventional wire harness wiring structure (not shown) other than the above, the middle part of the wire harness is raised vertically and the raised part is twisted in the circumferential direction as the door is opened and closed. It has also been proposed to relieve stress on the wire harness. The rising portion needs a sufficient height (length), and when the height is low, a means for relaxing the stress by bending the wire harness is required as in the examples of FIGS.

  However, in the wiring structure of the wire harness shown in FIG. 10, each wire 81 of the wire harness 80 has a small diameter and a thin shape, so that it can be easily bent with a small radius, so that it can be bent or bent. There was concern that it could cause Although it is known to cover the slack portion 82 of the wire harness 80 with a synthetic resin cover or duct, there is a concern that the function as a flexible flat wire harness may be impaired in this case. Moreover, since the diameter of each electric wire 81 is thin, there existed a problem that it was unsuitable for energizing a big electric current.

  In the wiring structure of the wire harness of FIG. 11, when the diameter of each electric wire constituting the wire harness 68 is large, the link arm 66 is rotated when the door 62 is opened and closed so that the wire harness 68 is a shaft portion. When bent in the vicinity of 73, there is a concern that a large bending load is applied to each wire of the wire harness 68, and the bending durability of the wire harness 68 may be lowered.

  In view of the above-mentioned points, the present invention can smoothly bend each electric wire smoothly or without bending in a limited space even when an electric wire having a diameter larger than that of each electric wire of the flexible flat wire harness is used. It is an object of the present invention to provide a bent part structure of a wire harness that can be performed at the same time and can improve the bending durability of an electric wire and thus the reliability of power feeding.

  In order to achieve the above-mentioned object, the bent portion structure of the wire harness according to claim 1 of the present invention uses a wire harness constituted by a plurality of electric wires and having a substantially circular cross section, and the plurality of wires are bent at the bent portion of the wire harness. The wires are arranged in a flat shape, flexible plates are arranged on both sides of the flat-shaped wires, the flexible plates are fixed with a binding member, and the flexible plate on the outer side of the bending is bound to the wire harness. It is characterized by being fixed with.

  With the above configuration, a normal large current can be applied to the wire harness including the bent portion, and the bent portion is flattened, so that each wire is bent with a small force, and the flexible plates on both sides As a result, the bending radius of each electric wire is ensured to be large without causing bending or bending. The flexible plate on the outer side of the bend is fixed to the wire harness (the portion that is not the bent portion), and the flexible plate on the inner side of the bend is not fixed to the wire harness. Performed smoothly. Since the flat arrayed wires are thin even including the flexible plates on both sides, they can be bent in a limited narrow space.

  The bent portion structure of the wire harness according to claim 2 is such that a small number of large-diameter electric wires are joint-connected to both ends of a flat electric wire formed by connecting a plurality of small-diameter electric wires, and the flat electric wires are bent in the plate thickness direction. It is characterized by making it.

  With the above configuration, it is possible to pass a normal large current to the large-diameter wire of the wire harness and each small-diameter wire of the flat wire joint-connected thereto, and the bent portion is flattened by the flat wire, Bending is performed smoothly with a small force. Since the flat electric wire is thin, it can be bent in a limited narrow space. The current flows from one large-diameter wire to the other large-diameter wire through a flat wire.

  The bent portion structure of the wire harness according to claim 3 is the bent portion structure of the wire harness according to claim 2, wherein the cross-sectional areas of the core wire portions of the flat electric wire and the core wire portion of the large-diameter electric wire are set equal to each other. It is characterized by that.

  With the above configuration, the energization allowable current values of the flat electric wire and the large-diameter electric wire are equal, and the energization efficiency is increased (if the cross-sectional areas are different, the allowable current value is matched to the small cross-sectional area, and thus the efficiency is reduced).

  The bent part structure of the wire harness according to claim 4 is the bent part structure of the wire harness according to claim 2 or 3, wherein the two flat electric wires are arranged in parallel, and both the flat electric wires are fixed to each other by a binding member. It is characterized by that.

  With the above-described configuration, the bending rigidity is increased by two parallel flat electric wires as compared with the case of one piece, and the bending radius of each electric wire is ensured to be large without causing bending or bending wrinkles. Since the two flat electric wires are thin, they can be bent in a limited narrow space.

  The bent structure of the wire harness according to claim 5 is characterized in that, in the bent structure of the wire harness according to claim 4, small-sized electric wires are arranged in a flat shape between the two flat electric wires.

  With the above configuration, it is possible to cope with an increase in the number of circuits by two flat electric wires and small electric wires between them. Since each small-diameter wire is arranged in a flat shape in parallel with each flat wire, the bending is smoothly performed with a small force, space is not taken, and the bending radius is specified by each flat wire so that it is not bent. Is prevented.

  The bent part structure of the wire harness according to claim 6 is characterized in that in the bent part structure of the wire harness according to any one of claims 2 to 5, the joint connection is made by a joint terminal.

  By the said structure, each core part of a flat electric wire is connected to a large diameter electric wire via a joint terminal. As the joint terminal, a joint pressure contact terminal is preferable in terms of improving connection workability. The joint terminal is disposed in the width direction of the flat electric wire and acts as a reinforcing member that prevents bending of the flat electric wire in the thickness direction.

  The bent structure of the wire harness according to claim 7 is the bent structure of the wire harness according to any one of claims 1 to 6, wherein the door is connected to the vehicle body via a link arm so as to be opened and closed. The wire harness is routed from the arm to the vehicle body and applied to the bent portion of the wire harness on the vehicle body side when the door is opened and closed.

  With the above configuration, the link arm swings with the opening and closing of the door, the wire harness is bent between the link arm and the vehicle body, and the bent portion is limited on the vehicle body side by the respective bent portion structures. By bending smoothly without bending or bending in the space, the bending durability of the wire harness and thus the reliability of power supply are improved.

  According to invention of Claim 1, while being able to respond | correspond to energization of a big electric current using a larger diameter electric wire than each electric wire of the conventional flat wire harness, even if it is a large diameter electric wire, it arranges in flat shape. Therefore, it can be bent without difficulty in a limited space of a vehicle, etc., and the bending radius of each electric wire can be secured by the flexible plates on both sides, and the occurrence of bending and bending of each electric wire can be prevented. The bending durability of the wire harness can be improved and the reliability of power supply can be increased.

  According to invention of Claim 2, while being able to respond | correspond to energization of a big electric current using a larger diameter electric wire than each electric wire of the conventional flat wire harness, and connecting a flat electric wire to a large diameter electric wire, The wire harness can be reasonably bent in a limited space such as a vehicle, and the bending durability of the wire harness can be improved and the reliability of power feeding can be improved as compared with the case where a large-diameter electric wire is bent.

  According to invention of Claim 3, an equivalent electric current can be reliably sent through a large diameter electric wire and a flat electric wire, and the reliability of electric power feeding improves.

  According to the fourth aspect of the present invention, a large bending radius can be secured by the two flat electric wires, the occurrence of bending and bending of each electric wire can be prevented, the bending durability of the wire harness can be improved, and power supply reliability can be improved. Can increase the sex.

  According to the fifth aspect of the present invention, it is possible to cope with an increase in the number of circuits, and to bend each flat electric wire with a large radius together with the outer flat electric wire to prevent the electric wires from being bent and the like. Reliability can be increased.

  According to the sixth aspect of the invention, it is possible to reliably connect the large-diameter electric wire and the core wire portions of the flat electric wire with a joint terminal with good workability, and to improve the reliability of power feeding.

  According to the seventh aspect of the present invention, it is possible to improve the bending durability of the bent portion in the wire harness that constantly supplies power to the link type door, thereby improving the reliability of the constant power supply.

  FIG. 1 shows an embodiment of a link wiring harness wiring structure to which a bent structure of a wire harness according to the present invention is applied.

  This link type door 1 is swingably supported by a vehicle body 4 by a pair of front and rear parallel link arms 2 and 3, and the pair of link arms 2 and 3 are made of iron, aluminum alloy or the like. The metal material is formed with high strength and rigidity.

  The distal ends of the link arms 2 and 3 are rotatably supported by the door-side link bracket 5 by the shaft portion 7, and the base ends of the link arms 2 and 3 are supported by the vehicle body-side link bracket 6. It is supported so that it can rotate freely. Both link brackets 2 and 3 are arranged in parallel, and a pair of front and rear link arms 2 and 3 and a pair of left and right link brackets 5 and 6 form a parallelogram link mechanism. The link bracket 6 on the vehicle body side is disposed inside the rocker portion 8.

  In FIG. 1, the left side is the vehicle front side and the right side is the vehicle rear side. In FIG. 1, the solid line indicates the fully open state of the door 1, and the chain line indicates the fully closed state of the door 1. When the door 1 is fully opened, the pair of link arms 2 and 3 extend obliquely rearward in an open state, an entrance for getting on and off is formed on the front side of the door 1, and a crossing space 10 is formed between the door 1 and the vehicle body 4. When the door 1 is fully closed, the link arms 2 and 3 are closed to the front side, and the door 1 and the vehicle body 4 are in close contact with each other. When the door 1 is opened and closed, the link arms 2 and 3 are always parallel, and the link brackets 5 and 6 are always parallel and maintain a parallelogram shape.

  A straight portion 14c of a wire harness (a plurality of insulated coated electric wires) 14 is routed horizontally along the outer side surface (front side surface) of the front link arm 2. The straight portion 14c may be accommodated in a harness protector (not shown) made of synthetic resin.

  One portion 14a of the wire harness is led out from the distal end 2a side of the link arm to the door 1 side, and the other portion 14b is arranged so as to be bent along the rocker portion 8 of the vehicle body 4 from the proximal end 2b side of the link arm 2. It has been searched. The bending portion structure of each form of the wire harness described later is applied to the bendable portion 26.

One portion 14 a of the wire harness 14 is raised vertically along the vertical portion 15 of the door-side harness protector 47 (the raised portion is indicated by 14 a ₁ ), and is horizontal along the horizontal portion 16 of the harness protector 47. , While being routed through the horizontal portion 16, led out upward and routed inside the door inner panel 1 a through an elastic waterproof grommet 17 made of synthetic rubber. The harness protector 47 is fixed to the skirt of the door inner panel 1a with a locking clip or the like.

With the opening and closing of the door 1, along with swings back and forth up portion 14a ₁ wire harness 14 is standing in the harness protector 47 side of the door side as a fulcrum, the raised portion 14a ₁ is twisted in the circumferential direction, the link arms Absorbs stresses associated with a few rotations.

  The other portion 14b of the wire harness 14 is routed forward from the base end 2a side of the link arm 2 along the rocker portion 8 of the vehicle body 4 so as to be bent in the horizontal direction with a surplus length. It is routed from the portion 22 into the vehicle body and held in the hole 22 by an elastic waterproof grommet 23 made of synthetic rubber.

  The other portion 14b of the wire harness 14 is gently bent with a large radius from the link arm 2 to the rocker portion 8 when the door 1 is fully opened (indicated by a solid line), and from the link arm 2 to the rocker portion 8 when the door 1 is fully closed. And bent while being folded at a relatively small radius as indicated by a chain line (the bent portion is indicated by reference numeral 26), thereby absorbing the extra harness length.

  2 to 3 show an embodiment of the bent portion structure of the wire harness. 2 is a plan view, and FIG. 3 is a perspective view of the AA cross section of FIG.

  The bent portion structure of this wire harness has a plurality of insulated round electric wires 25 arranged in two rows in a flat shape in the vertical direction to form two rows of flat arranged electric wires 24. Flexible resin plates (flexible plates) 27 and 28 are arranged on both sides, the flat arrayed electric wires 24 are sandwiched between the two resin plates 27 and 28, and two resin tapes (binding members) 29 are attached. The minimum bending radius of each electric wire 25 is regulated by the rigidity of the resin plates 27 and 28 by partially winding the resin plates 27 and 28 around the outer surface side of the resin plates 27 and 28 and fixing them.

  Here, the rigidity of the resin plates 27 and 28 is a property for preventing the bending of each electric wire 25 by causing each electric wire 25 to be bent with a large radius instead of a small radius. The bending radius of each electric wire 25 is an intermediate value between the bending radius of the outer resin plate 27 and the bending radius of the inner resin plate 28.

  In this example, the width (height) of the resin plates 27 and 28 is set to be equal to or higher than the height of the flat arrayed wires 24, and the thickness of the resin plates 27 and 28 is the same as the outer diameter of each wire 25. It is set to be thinner or thinner than that. The thicknesses of the resin plates 27 and 28 are appropriately set according to the type of resin material (degree of rigidity), the diameter and rigidity of the electric wire 25, and the like.

  Each electric wire 25 is independent without being connected, and is composed of a flexible core wire (conductor portion) 25a and an outer flexible insulating coating 25b. Instead of arranging the electric wires 25 in two rows, they can be arranged in one row, or in the case of thin wires, they can be arranged in three rows. The best ease of bending is in one row, but two rows are preferable in order to achieve both the ease of bending and the increase in the number of circuits. Even in a single row, the two resin plates 27 and 28 prevent the electric wires 25 from being bent at a small diameter and bent accordingly.

  Instead of the tape 29, it is also possible to use a band, a rubber band, a locking clip or the like (not shown) as a binding member. These tapes 29 and bands do not need to be in contact with the electric wires 25, and may be any one that holds the flat arrayed electric wires 24 between the two resin plates 27 and 28. The locking clip is provided with a pair of inclined flexible claws at the tip of a support column, and is inserted and locked in a hole (not shown) of a mating resin plate.

  As shown in FIG. 2, a gap 30 may be provided between the flat arrayed electric wires 24 and the resin plates 27 and 28. In this case, the gap 30 is set to be smaller than the wire radius so as not to disturb the flat arrangement of the electric wires 25, and the electric wires 25 (FIG. 3) at the lower end of the flat arrangement electric wires 24 come into contact with the inner surface of the tape 29 to be stable. Supported by

In the example of FIG. 2, the tape 29 to the respective terminals of the package member 31, such longitudinal ends 27a wire harness 14 ₁ made of synthetic resin corrugated tube or protector or synthetic rubber grommets such bending outer resin plate 27 The resin plate 28 on the inner side of the bend is formed shorter than the outer resin plate 27, and both end portions 28 a of the resin plate 28 on the inner side of the bend are not taped by the exterior member 31 but the end portion of the outer resin plate 27. It is fixed in the vicinity (longitudinal intermediate portion). It is also possible to bind the electric wires 25 by tape winding (not shown) without using the exterior member 31.

The outer resin plate 27 is fixed to the exterior member 31 of the wire harness 14 _1, that is fixed to the outside of the resin plate 27 to the inside of the resin plate 28 at a little distance to the harness longitudinal direction from the end of the package member 31 The bending and extension (extension / contraction operation) of the flat arrayed wires 24 are smoothly performed with a small force without being caught.

  The electric wires 25 are arranged in a flat shape between the two exterior members 31, and are arranged in a shape such as a substantially circular shape or a rectangular shape in accordance with the cross-sectional shape of the exterior member 31 in the interior of both the exterior members 31. . That is, the electric wires 25 are arranged in a flat shape at the place where they are exposed (exposed position), are sandwiched between the inner and outer resin plates 27 and 28, and are held flexibly with a large radius without being bent. . Each exterior member 31 of this example has a harness guide portion 31a protruding from the terminal, and each electric wire 25 is expanded in a fan shape along the guide portion 31a and is flattened.

Since the electric wires 24 are arranged in a flat shape instead of a circular cross section in the bent portion 26 ₁ of the wire harness 14 ₁ , the bent portion structure of the wire harness is thinned even if the thickness of the inner and outer resin plates 27 and 28 is added. Then, it is arranged so as to be bent in a limited narrow space such as a vehicle body.

  Corresponding to the exterior member 31 of FIG. 2, in FIG. 1, the wire harness portion 14 c along the link arm 2 and the rocker portion 8 of the vehicle body 4 except the substantially U-shaped bent portion 26. The exterior member 31 is attached to the along wire harness portion 14b. A bent portion 26 of the wire harness 14 is formed in a flat shape in the height direction, and resin plates 27 and 28 are disposed on both sides thereof.

  When the door 1 is closed as shown by a chain line in FIG. 1, the bent portion 26 of the wire harness 14 is bent in a substantially U shape on the vehicle body side as shown in FIG. ) Is arranged flat in a direction (vertical direction) perpendicular to the bending direction (for example, the front-rear direction), each electric wire 25 bends smoothly with a small force, and the harness surplus length is reliably absorbed, In addition, it is bent with a large radius together with the resin plates 27 and 28 on both sides, and it is reliably prevented from being bent and accompanying damage to the electric wire 25 or bending crease, thereby improving the bending durability of the wire harness 14.

  In the above embodiment, the resin plates 27 and 28 are used as the flexible plates. However, it is also possible to use a thin metal plate such as stainless steel instead of the resin plate.

  4 to 9 show other embodiments of the bent portion structure of the wire harness according to the present invention.

  This bent portion structure is also applied to the harness wiring structure of the link type door of FIG. 4 corresponds to the closed state of the door 1 indicated by the chain line in FIG. 1, FIG. 5 corresponds to the BB cross section of FIG. 4, and FIG. 6 corresponds to the open state of the door 1 indicated by the solid line in FIG. .

Bent part structure of the wire harness, as shown in FIGS. 4 to 6, parallel to the upright position two of the flat wire 35 formed by connecting a plurality of small-diameter wire 33 with the insulating band portion 34 at the bent portion 26 ₂ The first feature is that each flat electric wire 35 is joint-connected to one large-diameter (large-diameter) electric wire 36 at the bent terminal portion (before the bent portion) as shown in FIGS. As shown in FIGS. 4 to 6, between the two flat electric wires 35, a flat arrayed electric wire 37 formed by arranging a plurality of independent small-diameter electric wires 38 in parallel in the vertical direction is arranged. This is the second feature.

  As shown in FIGS. 4 to 6, the two flat electric wires 35 are partially wound with a tape (bundling member) 39 and fixed to each other in a state where the small-diameter electric wires 38 are arranged in a flat shape therebetween. Each small-diameter electric wire 38 is sandwiched between both flat electric wires 35 and held flat. A small gap 40 may be provided between the flat electric wire 35 and the small diameter electric wire 38 so as not to disturb the flat arrangement of the small diameter electric wires 38.

  Each electric wire 33 of the flat electric wire 35 is composed of a flexible core wire (conductor portion) 33a and an outer insulating coating 33b. The insulating coating 33b of each electric wire 33 is thin and has a flexible insulating band portion 34 in the radial direction. Are interconnected. The conductor portion 33a of the flat electric wire 35 may have a rectangular cross section (flat shape). However, the flat conductor portion needs to be capable of being pressed against a joint pressure contact terminal described later. The outer diameter of the small-diameter electric wire 38 positioned between the two flat electric wires 35 is approximately the same as the outer diameter of each electric wire 33 of the flat electric wire 35.

In this example, the flat array electric wires 37 formed of the small diameter electric wires 38 are arranged in two rows. The flat arrayed electric wires 37 may be arranged in one row according to the number of circuits, or may be arranged in three rows in the case of an extremely small diameter electric wire. The height of the flat arrayed electric wires 37 is equal to or less than the width of the flat electric wires 35, and each small-diameter electric wire 38 is supported by being engaged with a recess along the insulating band 34 of the flat electric wire 35, or a tape 39. It is supported by the inner surface of the lower end of. The flat arrayed wires 37 are routed along (along with) the large-diameter wires 36 through two parallel large-diameter wires 36. The large-diameter electric wire 36 is routed up to the front of the bent portion 26 ₂ .

  When the small-diameter electric wire 38 is not used, the two flat electric wires 35 are wound and fixed with the tape 39 in a state where they are in contact with or close to each other. Instead of the tape 39, a band, a rubber band, a locking clip, or the like can be used as a binding member. When the number of circuits is small, it is possible to use only one flat wire 35. Also in this case, a large-diameter electric wire 36 is joint-connected to both ends of the flat electric wire 35.

With the wiring harness 14 ₂ as shown in FIG. 4 is bent from the extended state of the wire harness 14 ₂ in FIG. 6 (if that corresponds to the application example of FIG. 1), the flat cable 35 bent inward than the outer flat cable 35 Further, by pushing the inner large-diameter electric wire 36 in the longitudinal direction while bending to a small diameter, the bending difference from the outer flat electric wire 35 is absorbed, and smooth bending becomes possible.

  As shown in FIG. 7, the flat electric wire 35 and the large-diameter electric wire 36 are connected to each other using a joint terminal 41. The joint terminal 41 includes a rectangular (band-like) substrate portion 42 extending in the width direction of the flat electric wire 35, a small pressure contact terminal portion 43 erected on one side of the substrate portion 42, and the other side of the substrate portion 42. A large press contact terminal portion 44 is provided. Each press contact terminal portion 43, 44 is composed of a central slot 45, a pair of press contact pieces 43a, 44a on both sides of the slot, and coated cutting blades 43b, 44b on the inlet side of each press contact piece. The tips of the pressure contact pieces 43a and 44a are preferably as sharp as possible.

The large-diameter electric wire 36 is a round-shaped electric wire composed of a core wire portion (conductor portion) 36a having a large-diameter cross-section and a dielectric coating 36b on the outer side, and can supply a large current. Since the large-diameter electric wire 36 is positioned away from the bent portion 26 ₂ (FIG. 4), it may be difficult to bend.

  As shown in FIG. 8, joint terminals 41 having the same shape are arranged in a rotationally symmetrical manner in common at both ends of the flat electric wire 35, and each of the terminals of the flat electric wire 35 is connected to the small pressure contact terminal portions 43 of the one joint terminal 41. While the electric wire 33 is pressure-contacted, the terminal of one large diameter electric wire 36 is press-contacted to the large press-contact terminal part 44, and each small terminal of the other end of the flat electric wire 35 is connected to each small press-contact terminal part 43 of the other joint terminal 41. While the electric wire 33 is press-contacted, the terminal of the other large diameter electric wire 36 is press-contacted to the large press-contact terminal portion 44.

  The pressure contact piece 43a of the small pressure contact terminal portion 43 passes through the insulating band portion 34 of the flat electric wire 35 and is pressure contacted with the core wire portion 33a. It is also possible to press the electric wire 33 to the press contact terminal portion 43 by cutting away the insulating band portion 34 in advance at the terminal portion of the flat electric wire 35. The board portion 42 of the joint terminal 41 is disposed along the width direction of the flat electric wire 35 and functions as a reinforcing member that prevents the flat electric wire 35 from being bent in the thickness direction.

  In the example of FIG. 8, the same joint terminal 41 is shared and two large-diameter electric wires 36 are arranged vertically and symmetrically. However, the two large-diameter electric wires 36 should be arranged in a straight line above or below. It is also possible to use different joint terminals that are line-symmetric, or to turn over the joint terminal 41 of FIG. It goes without saying that the core wire portions 33a, 36a are pressure-contacted while the coverings 33b, 36b of the electric wires 33, 36 are torn at the respective press-contact terminal portions 43, 44.

  As shown in FIG. 9 (a), a wire harness is conventionally configured using two large-diameter electric wires 36 in parallel, whereas in the present invention, each of two large wires 36 is used as shown in FIG. 9 (b). The core portions of a plurality of (four in this example) small-diameter wires 33 that have the same cross-sectional area as the cross-sectional area of the core portion 36a of one large-diameter wire 36 between the large-diameter wires 36 A flat electric wire 35 having 33a is connected. Since the cross-sectional areas of the core wire portions 33a and 36a are equal, the large-diameter electric wire 36 and the flat electric wire 35 can be energized with an equivalent current value.

  As an example, the cross-sectional area of the large-diameter electric wire 36 is 2 sq, and the cross-sectional area of the small-diameter electric wire 33 of the flat electric wire 35 is 0.5 sq. Each of the two large-diameter electric wires 36 in FIG. 9B is arranged on both sides of an intermediate small-diameter flat array electric wire 37 together with the flat electric wire 35 as shown in FIG. If there is room in the space in the height direction, it is possible to arrange two sets of electric wire connecting bodies 48 composed of the flat electric wires 35 and the large-diameter electric wires 36 in FIG.

  The cross-sectional area of the core wire portion 36a of the large-diameter electric wire 36 and the sum of the cross-sectional areas of the core wire portions 33a of the flat electric wire 35 do not necessarily have to be equal (even if the cross-sectional areas are slightly different, the smaller cross-sectional area Current that is appropriate for the

  In the above embodiment (FIGS. 7 to 8), the electric wires 33 and 36 are connected using the joint pressure contact terminals having the pressure contact portions 43 and 44 as the joint terminals 41. It is also possible to connect the electric wires 33 and 36 by welding or the like without using a crimp terminal (not shown) or using a joint terminal. The joint crimp terminal has a crimp terminal portion, and the crimp terminal portion is crimped (crimped) to the core wire portion. However, it is best to use the joint pressure contact terminal 41 in order to improve the connection workability.

In the above embodiment (FIGS. 4-6), but using a wire harness 14 _second bent portion 26 ₂ on two of the flat cable 35, when a small number of circuits is a piece of flat cable 35 It is also possible to configure a harness bent portion by connecting to a large-diameter electric wire 36 with a joint terminal 41 or the like. In this case, it is assumed that the flat array electric wire 37 composed of the inner small-diameter electric wires 38 is not used.

  Moreover, in the said embodiment (FIGS. 7-8), although the large diameter electric wire 36 was joint-connected one by one to both the ends of the flat electric wire 35, for example, the number of each electric wires 33 of the flat electric wire 35 is double (this number In the case of eight wires in the example, it is possible to jointly connect two large-diameter electric wires 36 to both terminals instead of one. The number of the large-diameter electric wires 36 may be small with respect to the number of the electric wires 33 of the flat electric wire 35.

  Further, in each of the above-described embodiments (FIGS. 2 to 9), the bent structure of the wire harness is applied for constantly supplying power to the link type door 1 in FIG. It is also possible to apply the bent structure of the wire harness for power feeding such as a rotating automobile door or a sliding door (not shown).

  In that case, when the bending direction of the wire harness is not the horizontal direction (front and rear) but the vertical direction (up and down), the electric wires are arranged flat in a direction orthogonal to the bending direction, that is, in the horizontal direction.

It is a perspective view which shows the harness wiring structure of the link type door as one example of application of the bending part structure of the wire harness of this invention. It is a top view which shows one Embodiment of the bending part structure of the wire harness which concerns on this invention. It is a perspective view which shows the AA cross section of FIG. It is a top view which shows other embodiment of the bending part structure of the wire harness which concerns on this invention. It is a perspective view which shows the BB cross section of FIG. It is a top view which shows the state which extended the wire harness similarly. It is a disassembled perspective view which shows one form of the joint terminal which connects the intermediate part (bending part) of a wire harness. It is a perspective view which shows the state which similarly connected the intermediate part of the wire harness with the joint terminal. (A) is a front view which shows the conventional electric wire arrangement | sequence form, (b) is a front view which shows in circuit form one form of the electric wire arrangement | sequence in the bending part of the wire harness of this invention. It is a disassembled perspective view which shows one form of the wiring structure of the wire harness in the conventional motor vehicle door. It is a disassembled perspective view which shows the other form of the wiring structure of the wire harness in the conventional motor vehicle door.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Door 2 Link arm 4 Vehicle body 14 ₁ , 14 ₂ Wire harness 24, 37 Flat arrangement electric wire 25 Electric wire 26 ₁ , 26 ₂ Bending part 27, 28 Resin plate (flexible plate)
29, 39 Tape (Bundling member)
33 Small-diameter wire 33a, 36a Core wire part 35 Flat wire 36 Large-diameter wire 38 Small-diameter wire 41 Joint terminal

Claims (7)

  Using a wire harness composed of a plurality of electric wires having a substantially circular cross section, the plurality of electric wires are arranged in a flat shape at the bent portion of the wire harness, and flexible plates are arranged on both sides of the flat arranged electric wire. A bent structure of a wire harness, characterized in that both flexible plates are fixed by a binding member, and a flexible outer flexible plate is fixed to the wire harness by a binding member.   A bent portion structure of a wire harness, characterized in that a small number of large-diameter wires are joint-connected to both ends of a flat wire formed by connecting a plurality of small-diameter wires, and the flat wires are bent in the thickness direction.   The bending part structure of the wire harness according to claim 2, wherein cross-sectional areas of each core wire part of the flat electric wire and the core wire part of the large-diameter electric wire are set to be equal.   4. The bent structure of a wire harness according to claim 2, wherein the two flat electric wires are arranged in parallel, and the two flat electric wires are fixed to each other by a binding member.   5. The bent structure of a wire harness according to claim 4, wherein small-diameter electric wires are arranged in a flat shape between the two flat electric wires.   The bent structure of a wire harness according to claim 2, wherein the joint connection is performed by a joint terminal.   A door is connected to a vehicle body via a link arm so as to be freely opened and closed, the wire harness is routed from the link arm to the vehicle body, and the bent portion of the wire harness on the vehicle body side when the door is opened and closed The bent structure of the wire harness according to claim 1, wherein the bent portion structure is applied to the wire harness.

Images