JP2012174468A - Wiring harness and manufacturing method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiring harness which can route a wire reliably along a desired route while ensuring high resistance degree and excellent transportability, and to provide a manufacturing method therefor.SOLUTION: The wiring harness includes a flexible tube 12 which internally houses a high voltage wire 10, and a tape 13 which is wound around the outer surface of the flexible tube 12 and can change the form from flexible state to hardened state. The tape 13 is wound in the direction in which the increase in the strength resistance degree of the wiring harness is desired in a form where the tape is hardened in the direction of high strength of the tape.

Description

  The present invention relates to a wire harness and a method of manufacturing a wire harness.

  In a vehicle equipped with a traveling motor, power is supplied from a battery via a wire harness. Since this power supply wire harness includes a plurality of high-voltage electric wires having a large electric wire diameter, the bending rigidity is higher than that of a normal one. Moreover, it is necessary for the wire harness for power supply to reliably protect the high voltage electric wire from the outside. As such a conventional wire harness, the one disclosed in Patent Document 1 has been proposed.

  The wire harness of Patent Document 1 includes a plurality of high-voltage wires and a plurality of metal protection pipes that house the high-voltage wires inside. According to this wire harness, when the metal protection pipe is bent, the high-voltage electric wire having high bending rigidity is also bent in accordance with this, so that it can be routed along a desired route. Moreover, since the metal protective pipe receives a load acting on the wire harness, the strength resistance (strength withstanding the load) is also high.

  By the way, the wire harness is manufactured at a harness manufacturer's factory, transported to an automobile manufacturer's assembly factory, and assembled to a vehicle. That is, the manufacturing location of the wire harness is different from the wiring location of the harness vehicle.

JP 2004-224156 A

  Since the wire harness of the conventional example has a metal protection pipe formed along the routing route, it cannot be transformed into a form suitable for conveyance. Therefore, the transportability is poor. In particular, a wire harness having a long routing route has very poor transportability.

  Accordingly, the present invention has been made to solve the above-described problem, and can wire an electric wire along a desired arrangement route reliably, has high strength, and has excellent transportability. It aims at providing the manufacturing method of a harness and a wire harness.

  The present invention includes a tube that accommodates an electric wire therein, and a tape that is wound around the outer surface of the tube and can change the form from a flexible state to a cured state, and the tape is cured in a direction with high tape strength. It is the wire harness characterized by being wound in the direction which becomes a direction which wants to make strength strength large with a form.

  The tape may be spirally wound around the tube. The tape may be wound at the same position without shifting the winding position in the axial direction of the tube. The tape may be wound around the tube over a plurality of layers. The tape may be wound in a plurality of layers. The tape may be wound in different layers.

  In another aspect of the present invention, a tape that can change the form from a flexible state to a cured state is wound around a tube that accommodates an electric wire inside, and the tape is in a direction in which the direction in which the tape strength is high is hardened and the strength is to be increased. A wire comprising: a tape winding step of winding in a winding method, and a tape curing step of performing a form curing process on a tape wound around a tube and curing the tape in a form along a desired routing route It is a manufacturing method of a harness.

  According to the present invention, at the time of manufacturing the wire harness, the form wound processing is not performed on the tape wound around the tube, the wire harness is transported as a form suitable for transportation, and the tape is obtained by performing the form curing process at the time of vehicle assembly. If it hardens | cures with the form along a routing path | route, a tube and an electric wire can be routed according to the hardening form of this tape, and the form hardening tape receives the load which acts on the tape winding location of a wire harness. As described above, the wires can be reliably routed along the desired route, the strength is high, and the transportability is excellent.

  In addition, since the tape is wound in such a direction that the direction in which the tape strength is high becomes the direction in which the strength is desired to be increased, it is possible to effectively obtain the strength that conforms to the assumed load at each location. Therefore, the minimum amount of tape used is sufficient to obtain the desired strength.

FIG. 2 is a schematic layout diagram of mounted components and the like to which the wire harness is connected according to the embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS Embodiment of this invention is shown, (a) is a front view of the vehicle body arrangement | positioning state of a wire harness, (b) is sectional drawing of a wire harness.

(B) is a perspective view which shows the state which bent the winding location of the tape along the routing path | route, and hardened the tape.
The embodiment of the present invention is shown, (a) is a schematic diagram of a tape knitting structure, (b) is a schematic diagram showing a deformation state when a tensile force is applied in the tape knitting longitudinal direction (tape longitudinal direction), (C) is a schematic diagram showing a deformed state when a tensile force is applied in the transverse direction (tape width direction) of the tape. It is a front view which shows the direction where intensity | strength becomes strong when a tape is wound helically. (A) is a front view which shows the direction where intensity | strength becomes strong when a tape is wound around a wrapping, and (b) is a side view at the time of winding a tape around a wrapping. (A) shows the embodiment of the present invention, a front view showing a tape winding structure around the fixing portion of the wire harness, (b) a front view showing a modification of the tape winding structure around the fixing portion of the wire harness It is. It is a perspective view which shows embodiment of this invention and shows the tape winding structure in the bending part of a wire harness. It is a front view which shows the embodiment of the present invention and shows a state where the tape is wound in two layers in a spiral shape. It is a front view which shows the embodiment of this invention, and shows the state which wound the tape one by one in the mutually different direction. It is a front view which shows the embodiment of the present invention, and shows a state in which each layer is wound by wrapping and spiral winding.

(Embodiment)
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  In FIG. 1, a vehicle 1 includes an engine 2, a motor unit 3, and an inverter unit 4 at the front of the vehicle body, and a battery 5 with a junction block 6 at the rear of the vehicle body. The wire harnesses WH1 and WH2 are electrically connected between the motor unit 3 and the inverter unit 4 and between the inverter unit 4 and the junction block 6 of the battery 5, respectively. The motor unit 3 receives power supply from the battery 5 via the two wire harnesses WH1 and WH2. The wiring harness WH2 has a much longer routing distance than the wire harness WH1, and passes under the vehicle body floor as a routing route. Accordingly, the wire harness WH2 is routed along the bent routing route and is fixed to the vehicle body at a plurality of locations. This will be described below.

  As shown in FIGS. 2A and 2B, the wire harness WH2 includes three high-voltage wires 10, an electromagnetic shield member 11 covering these high-voltage wires 10, and three wires covered by the electromagnetic shield member 11. A flexible tube 12 that is a tube that accommodates the high-voltage electric wire 10 therein, a plurality of shape holding portions 15A and 15B provided on the outer peripheral surface of the flexible tube 12, and both ends of the three high-voltage electric wires 10 And a pair of connectors 14 connected to each other.

  The flexible tube 12 is made of synthetic resin. The flexible tube 12 has a flat oval shape. As a result, the height is reduced as much as possible when arranging under the vehicle floor. The flexible tube 12 has a bellows shape in which the outer peripheral surface repeats irregularities alternately along the axial direction. Thereby, it is easily formed by bending without reducing the rigidity.

  The shape holding portions 15 </ b> A and 15 </ b> B are places where it is desired to increase the strength of the wire harness WH <b> 2, and are configured by winding the tape 13 around the outer periphery of the flexible tube 12.

  First, the configuration of the tape 13 used will be described. As shown in FIG. 3A, the tape 13 is a casting tape in which a knitted structure (knit) based on glass fiber, resin fiber, or carbon fiber is impregnated with a resin that is cured by water, light, heat, or the like. It is. As shown in FIG. 3B, the tape 13 has a small amount of deformation with respect to a tensile load in the longitudinal direction of the knitting (tape longitudinal direction), and the strength in this direction is high. As shown in FIG. 3C, the tape has a large amount of deformation with respect to a tensile load in the knitting lateral direction (tape width direction), and the strength in this direction is small.

  The tape 13 can be elastically deformed by a knitted structure (knit) structure before the resin is cured, and maintains a flexible state. When the tape 13 is subjected to a form curing process for supplying water, light, heat, or the like, the cured resin is cured and the knitted structure (knit) structure cannot be elastically deformed, and the tape 13 is retained and cured. The tape 13 maintains the above-described strength relationship before curing even after curing, and has directionality in strength. Therefore, as shown in FIG. 4, when the tape 13 is spirally wound around the flexible tube 12, the direction along the winding direction is a high strength direction. Further, as shown in FIGS. 5A and 5B, the tape 13 is wrapped around the flexible tube 12 in the tape width direction, that is, wound at the same position without shifting the winding position in the axial direction. In this case, the direction along the axial direction of the flexible tube 12 is the direction S with high strength.

  Next, the tape winding method of each form holding | maintenance part 15A, 15B is demonstrated. The tape 13 is wound in such a direction that the direction in which the tape strength is high is cured and the strength is increased.

  Specifically, as shown in FIG. 6A, the shape holding portion 15A is a peripheral portion on one side of the fixing portion 20 of the wire harness WH2. It is assumed that a load (moment M) using the bolt 21 of the fixed portion 20 as a fulcrum acts on the shape holding portion 15A at this location. Therefore, the tape 13 is wound in a direction in which the direction S in which the tape strength is strong is in the assumed load direction, that is, in a spiral shape.

  As shown in FIG. 6B, the shape holding portion 15A may be a peripheral portion on both sides of the fixing portion 20 of the wire harness WH2. It is assumed that loads (moment M) in directions different from each other on the left and right are applied to the shape holding portion 15A at this location with the bolt 21 of the fixing portion 20 as a fulcrum. For this reason, the tape 13 is wound in a spiral manner in a direction in which the tape strength is strong in each assumed load direction, that is, in the left and right directions. Thereby, the strength strength of the wire harness WH2 on both sides can be increased.

  As shown in FIG. 7, the shape holding portion 15B is a bent portion of the wire harness WH2 in the vehicle body routing state. The shape holding portion 15B at this location is assumed to be a bending return deformation force of the high voltage electric wire 10 and the flexible tube 12. Due to this bending return deformation force, a tensile stress acts on the inner peripheral round portion a of the bent portion, and a compressive stress acts on the outer peripheral round portion b of the bent portion. Therefore, the tape 13 is wound in such a way that the direction in which the tape strength is strong in the direction of the assumed load (in this case, the tensile stress and the compressive stress), that is, the tape 13 is wrapped in the lateral direction of the tape. .

  When the bending return deformation force of the high-voltage electric wire 10 and the flexible tube 12 is strong at the bent portion of the wire harness WH2, it is preferable to perform two-layer winding of the tape 13 described below.

  Next, the operations from the manufacture of the wire harness WH2 to the assembly of the vehicle body will be briefly described focusing on the operations related to the shape holding portions 15A and 15B. The manufacturing location of the wire harness WH2 and the assembly location on the vehicle body are different. In the place where the wire harness WH2 is manufactured, the tape 13 is wound around a plurality of locations of the flexible tube 12 that houses the high-voltage electric wire 10 therein. Here, the tape 13 is wound in a winding method in which the direction in which the tape strength is high is cured and the strength is increased in the direction in which the strength is to be increased (tape winding step).

  The wire harness WH2 does not perform a form hardening process such as supplying water to the tape 13 at the manufacturing site. Since the wire harness WH2 does not have a rigid portion and can be freely changed in shape, the wire harness WH2 is transported to a place where the wire harness WH2 is assembled as a form suitable for transport.

  At the vehicle body assembly location, each tape 13 wound around the flexible tube 12 is subjected to a form hardening process such as water supply, and the portion where the tape 13 of the flexible tube 12 is wound is formed along a desired route. (See FIG. 2A), and the tape 13 is cured in this form (tape curing step). Thereby, form holding | maintenance part 15A, 15B is created in wire harness WH2. The work for forming the tape 13 and the form along the routing route are performed in consideration of the hardening time of the tape 13. Each location where the tape 13 of the wire harness WH2 is wound is held in a hardened tape form.

  As described above, the tape 13 is wound in such a manner that the direction in which the tape strength is high is cured and the direction in which the strength is desired is increased. Therefore, at the time of manufacturing the wire harness WH2, the tape 13 wound around the flexible tube 12 is not subjected to the form hardening process, but the wire harness WH2 is transported as a form suitable for transport, and the form hardening process is performed at the time of vehicle assembly. If the tape 13 is cured in a form along the routing path, the flexible tube 12 and the electric wire 10 can be routed following the cured form of the tape 13 and act on the tape winding portion of the wire harness WH2. The form-cured tape 13 receives the load. As described above, the high-voltage electric wire 10 can be reliably routed along a desired route, has high strength resistance, and is excellent in transportability.

  In addition, since the tape 13 is wound in a manner in which the direction in which the tape strength is high is hardened and the direction in which the strength is desired is increased, the tape 13 can effectively obtain the strength suitable for the assumed load for each part. Can do. Therefore, the minimum amount of tape used is sufficient to obtain the desired strength.

  That is, the strength direction required for the wire harness WH2 is determined by the vehicle vibration, the fixed position, the fixing direction, and the like. Therefore, the strength with respect to each load can be increased by performing a winding method suitable for the assumed load at each location of the wire harness WH2.

  In addition, since conventional wire harnesses have metal protection pipes, changing the wiring harness routing route requires changing the metal protection pipes themselves, re-bending, etc. Can not. However, in the present invention, since the tape 13 before curing can be freely changed into a desired form, it can easily cope with a change in the routing route of the wire harness WH2.

(Two-layer winding pattern of how to wind the tape)
The tape 13 may be wound not by a single layer but by a two-layer winding. For example, the following two-layer winding pattern is conceivable.

  As shown in FIG. 8, the tape 13 is wound around the flexible tube 12 in two layers in the same direction spirally. In this case, the direction along the winding direction becomes the directions S1 and S2 in which the strength is high, so that the strength resistance is double that in the case of one layer. This is effective in a direction where the load acts in one direction and the strength is to be increased.

  As shown in FIG. 9, the tape 13 is wound around the flexible tube 12 in a spiral manner in different directions. In this case, the direction along each winding direction becomes directions S1 and S2 with high intensity. Since the high-strength directions S1 and S2 are slightly different, this is effective when the direction in which the load acts is indefinite (when the load acts from all directions).

  As shown in FIG. 10, the first layer is wound so that the tape 13 is wrapped around the flexible tube in the tape width direction, and the second layer is wound spirally from above. In this case, the direction along the axial direction of the flexible tube 12 and the direction along the spiral winding direction are directions with high strength. Since the direction of high strength differs by 90 degrees, it is more effective when the direction in which the load acts is indefinite (when the load acts from all directions).

  Of course, the tape 13 may be wound in three or more layers.

(Other)
In the said embodiment, although shape holding | maintenance part 15A, 15B is provided in the bending location in the vehicle arrangement | positioning state of wire harness WH2, and the peripheral location of the fixing | fixed part 20, it is not limited to this. If there is a place other than these where it is desired to increase the strength resistance, that place is designated as a shape holding portion.

  In the embodiment, the tape 13 is a direction in which the knitting longitudinal direction is strong and the knitting transverse direction is a weak direction. However, the knitting direction and the strength direction are not limited thereto.

  In the said embodiment, although the high voltage electric wire 10 is used for the wire harness WH2, it is needless to say that it is applicable also to electric wires other than the high voltage electric wire 10. FIG.

10 High-voltage electric wires
12 Flexible tube (tube)
13 Tape WH1, WH2 Wire harness

Claims (7)

A tube containing the electric wire inside, and a tape wound around the outer periphery of the tube and capable of changing the form from a flexible state to a cured state;
The wire harness is characterized in that the tape is wound in a direction in which the direction in which the tape strength is high is hardened and the strength is increased. The wire harness according to claim 1,
A wire harness, wherein the tape is wound around the tube in a spiral shape. The wire harness according to claim 1,
A wire harness, wherein the tape is wound at the same position without shifting the winding position in the axial direction of the tube. The wire harness according to any one of claims 1 to 3,
The wire harness, wherein the tape is wound around the tube over a plurality of layers. The wire harness according to claim 4,
The tape has a plurality of layers wound in the same manner. The wire harness according to claim 1,
The wire harness is characterized in that the tape is wound in a plurality of layers. Tape that can change the form from a flexible state to a hardened state is wrapped around the tube that houses the electric wire inside, and the tape is wound in a way that the direction in which the strength of the tape is hardened is in the direction that you want to increase the strength resistance Winding process;
A method of manufacturing a wire harness, comprising: a tape curing step of performing a form curing process on a tape wound around a tube and curing the tape in a form along a desired route.

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