JP7154701B2 - Covering structure of wire harness - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a covering structure for wire harnesses routed in vehicles such as automobiles.

Conventionally, wire harnesses used for connecting electrical components inside the vehicle body of a vehicle such as an automobile are required to have a certain degree of flexibility in order to be routed in a curved or bent manner at a desired position of the vehicle body. A structure in which a single or a plurality of cables are inserted through a corrugated tube as an exterior is used.

The corrugated tube is a thin-walled cylindrical member made of synthetic resin, in which annular grooves and ridges formed along the side surface of the circumference are alternately arranged along the extending direction. have a configuration.

Further, the side wall of the corrugated tube is provided with slits penetrating through the inner peripheral surface and the outer peripheral surface and communicating with the openings at both ends of the corrugated tube. The slits are normally in a closed state due to the elasticity of the tube, and by deforming the surface of the tube, the intervals between the slits are widened so that the cable can be passed through the side of the corrugated tube.

A wire harness having such a corrugated tube has a certain degree of flexibility, but depending on the wiring layout, bending or twisting that deforms the side shape may occur, and it may not be possible to wire the vehicle body in a desired manner. It is likely to disappear. As a technique for preventing such a risk, Patent Literature 1 discloses a technique in which a fixing member is provided to rotatably indicate the opening end of the corrugated tube in the circumferential direction.

According to this, even if a twisting force is applied to the corrugated tube when wiring the wire harness, the corrugated tube rotates in the circumferential direction with respect to the fixture, thereby causing deformation and twisting. etc. can be prevented.

JP-A-2002-199558

However, the conventional techniques described above have the following problems. That is, in the above-described conventional technology, the fixture is required to have different dimensions according to the outer diameter of the corrugated tube to be wired, and it is necessary to prepare the number of points according to the wiring position and layout. This will increase the cost of the harness and complicate the configuration for wiring.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a wire harness covering structure capable of suppressing twisting of the wire harness with a simple and low-cost configuration.

In order to achieve the above object, the first aspect of the present invention provides a first tube having a plurality of cables inserted therein for connection with on-vehicle electrical equipment, and a cable around the outer circumference of the first tube. A coaxially formed second tube and an insulating coating coaxially formed on the outer circumference of the second tube are provided, and the first tube is a member formed in a cylindrical shape, the circumference of which is Annular recessed grooves and ridges formed along the side surfaces are arranged alternately along the extending direction, and penetrate the inner and outer peripheral surfaces of the side walls and communicate with the openings at both ends of the side walls. The second tube has a slit used for insertion of a cable, and the second tube is a member configured as a wound structure of a sheet member, the sheet member slidably contacting the surface of the first tube. The first tube is wound in such a manner that it is not fixed to the first tube, and the overlapping portion from the winding start end to the winding end is arranged at a position overlapping the slit of the first tube. The insulating coating is a wire harness coating structure covering the first tube as a cylindrical sleeve integrally wound around the surface of the second tube .
Further, according to the second aspect of the present invention, the cable exposed from the end of the first tube is connected to a connector for connecting with an electrical component mounted on the vehicle, and the connector is also fixed to the first tube. 1 is a covering structure for a wire harness according to the first aspect of the present invention, which is fixed in a fixed manner.

As another aspect of the present invention, the sleeve is wound in a direction orthogonal to the extending direction of the tube and is not in close contact with the surface of the tube; A coaxially laminated body may be used which is closely attached from the outside.

ADVANTAGE OF THE INVENTION The present invention as described above has the effect of making it possible to suppress the occurrence of twisting of the wire harness with a simple and low-cost configuration.

BRIEF DESCRIPTION OF THE DRAWINGS The perspective view which shows the structure of the covering structure of the wire harness which concerns on embodiment of this invention. Cross-sectional view along line A-A in FIG. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram for explaining the effects of the wiring harness covering structure according to the embodiment of the present invention; 1 is a perspective view showing an internal configuration of a vehicle including a wiring harness covering structure according to an embodiment of the present invention; BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram for explaining the effects of the wiring harness covering structure according to the embodiment of the present invention;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing the configuration of a wire harness having a wire harness covering structure according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along line AA in FIG.

As shown in each figure, the wire harness 10 according to the present embodiment includes a corrugated tube 12 in which a plurality of cables 11 are inserted for connection with an on-vehicle electrical component, and a cable around the corrugated tube 12. The main components are a twisted tube 13 coaxially formed and an insulating coating 14 coaxially formed around the outer circumference of the twisted tube 13 .

As in the conventional example, the corrugated tube 12 is a thin cylindrical member made of synthetic resin. It has a configuration alternately arranged along the . Further, the side wall of the corrugated tube 12 is provided with slits 12x through which the cable 11 is inserted, which penetrate through the inner and outer peripheral surfaces of the corrugated tube 12 and communicate with openings at both ends of the corrugated tube 12 .

The twisted tube 13 is composed of a sheet member 13s which is a sheet member wound in a direction perpendicular to the extending direction of the corrugated tube 12. As shown in FIG . The member is wound so as to form a sheet wrap portion 13L in which the member is doubled from the end portion 13a to the winding end portion 13b.

The sheet member 13s is made of an insulating material such as a woven fabric, is slidably brought into contact with the surface of the corrugated tube 12, and is wound in a non-fixed manner. Further, the sheet wrap portion 13L is arranged at a position overlapping the slit 12x of the corrugated tube 12. As shown in FIG.

The insulating coating 14 is composed of a belt-shaped member of an insulating material, such as vinyl tape, and is spirally wound around the surface of the twist tube 13 to integrally constitute a cylindrical coating. Also, the surface of the insulating coating 14 facing the twisted tube 13 is wound as an adhesive layer or adhesive layer in such a manner as to adhere to the surface of the twisted tube 13 . Thereby, the twisted tube 13 and the insulating coating 14 cover the corrugated tube 12 as an integrated sleeve.

Furthermore, the cable 11 exposed from the end of the corrugated tube 12 is connected to a connector 15 for connecting with electrical equipment mounted on the vehicle. The connector 15 is also fixed to the corrugated tube 12 in a fixed manner. In FIG. 1, the wiring harness 10 is shown in a state in which the insulating coating 14 and the twist tube 13 are partly removed and the inside is seen through for the purpose of explanation. 2, the respective thicknesses of the corrugated tube 12, the twisted tube 13, and the insulating coating 14, and the intervals between the slits 12 of the corrugated tube 12 are exaggerated for explanation. are omitted.

In the above configuration, the corrugated tube 12 corresponds to the tube of the present invention, and the combination of the twisted tube 13 and the insulating coating 14 corresponds to the covering structure of the sleeve and harness of the present invention, respectively.

In the wire harness 10 having the wire harness covering structure of the embodiment of the present invention having such a configuration, the twisted tube 13 covering the corrugated tube 12 having the slit 12x slides on the surface of the corrugated tube 12. By providing the configuration in which the wire is wound in a manner in which it is freely contacted and is not fixed, the following effects are produced. That is, as shown in FIG. 3, when the wire harness 10 is subjected to a force in the twisting direction indicated by the arrow R in the drawing with the extension direction as the central axis, the slit 12x of the corrugated tube 12 inside is subjected to twisting stress. The corrugated tube 12, which is the core material of the wire harness 10, absorbs the torsional stress by causing deformation such as the expansion of both ends of the slit and the like. To suppress deformation due to torsion.

As a result, even when a wiring layout that involves twisting the wire harness 10 in the vehicle body is required, the twisting of the corrugated tube 12 is suppressed, and the wire harness 10 is routed in a desired manner. becomes possible.

Furthermore, in the wiring harness covering structure of the present embodiment, the twisted tube 13 and the insulating covering 14 that cover the corrugated tube 12 follow the outer diameter of the corrugated tube as a natural covering of the wiring harness 10, and the wire harness 10, it is configured without depending on the mode of layout in the car.

Therefore, it is possible to suppress the occurrence of twisting of the wire harness with a simple and low-cost configuration.

Next, with reference to FIG. 4, an example of wiring of the wire harness 10 having the wire harness covering structure of the present embodiment to a vehicle will be described.

As shown in FIG. 4, in the floor panel 20 of the vehicle body, the wire harness 10 having the connector 15 to be assembled with the electrical components in the driver's seat 30 positioned above the floor 21 is positioned on the driver's seat 30 side. It is arranged on the floor 21 where the seat frame of the driver's seat is arranged, and while maintaining the extra length to move in the longitudinal direction according to the seat slide of the driver's seat 30, the driver's seat 30 Depending on the position of the seat slide, it is required to deform in such a manner that it does not interfere with the seat, seat rails, or floor panel 20 and is not exposed from the bottom surface of the seat into the vehicle interior. The longitudinal axis, the vertical axis, and the lateral axis are orthogonal to each other as indicated by the orthogonal coordinates shown in FIG. are defined to correspond to the vehicle length direction, vehicle height direction, and vehicle width direction, respectively. The following description will also be made with reference to the coordinates in the drawing as appropriate.

When the connector 15 is assembled at the correct position, as shown in FIG. 5, the wire harness 10 changes the position of the connector 15 from position 15a to position 15b when the driver's seat 30 is at a predetermined position forward. When this occurs, the contour 14a is deformed from the contour 14b so that the outer shape maintains a planar U-shape along the main surface of the floor panel 20. As shown in FIG.

On the other hand, when the wire harness 10 is twisted due to an incorrect assembly or the like when the connector 15 is assembled, when the position of the connector 15 changes from position 15a to position 15b, the corrugated tube 12 inside the wire harness 10 is twisted and deformed. do. As a result, the wiring harness 10 is distorted upward, downward, or laterally from the main surface of the floor panel 20 as illustrated by the contour 14c and interferes with the seat, the seat rails, or the floor panel 20, or the lower surface of the seat. There is a risk of being exposed from

On the other hand, according to the wiring harness covering structure of the present embodiment, even if twisting occurs when the connector 15 is assembled, the slits 12x are deformed inside the corrugated tube 12 so as to absorb the twisting. As a result, the occurrence of distortion in the shape of the corrugated tube 12 as a whole is suppressed, and the wiring layout of the wire harness 10 after the connector 15 is assembled is changed from the contour 14a to the contour 14b as described above, such as a planar U-shape. In addition, it is possible to maintain the desired state.

Furthermore, according to the present embodiment, the sheet wrap portion 13L in which the sheet members 13s of the twist tube 13 are doubly overlapped is arranged at a position overlapping the slit 12x of the corrugated tube 12. The reliability of the wire harness 10 can be improved by protecting the twisted tube 13 from contact with the edge of the slit 12x caused by deformation of the surface shape of the corrugated tube 12 at .

As described above, according to the wire harness covering structure of the embodiment of the present invention, it is possible to suppress the occurrence of twisting of the wire harness with a simple and low-cost configuration.

However, the invention is not limited to the above embodiments. In the above description, the sleeve, which is the covering structure of the wire harness of the present invention, is a combination of the twisted tube 13 as the wound body covering the corrugated tube 12 and the insulating coating 14 as the tight body. The sleeve of the invention may be composed of a single coating provided that it is in a manner to slidably contact and cover the surface of the corrugated tube 12 in a non-adhering manner.

Further, the twisted tube 13 is composed of a sheet member 13s which is a sheet-shaped member wound in a direction perpendicular to the extending direction of the corrugated tube 12, and the insulating coating 14 is composed of a band-shaped member of an insulating material. and wound spirally on the surface of the twist tube 13. However, the sleeve of the present invention is not limited by any other specific configuration, as long as it covers the tube in a manner that is not bonded to at least the surface including the slit of the tube. may be implemented in any manner. However, the use of the twisted tube 13 and the insulating coating 14 having the above configurations makes it possible to easily and selectively form the wire harness of the present invention at a desired location in the wire harness 10, improve workability, and It is possible to suppress the occurrence of twisting of the wire harness at low cost, which is more preferable.

Furthermore, in the above description, the twisted tube 13 is slidably contacted with the surface of the corrugated tube 12 and wound in a non-fixed manner. It is sufficient that deformation of the entire tube outer shape can be suppressed by deforming the vicinity of the slit by twisting because the tube is not bonded to the surface including the slit.

Therefore, the twist tube 13 may be a part of the corrugated tube 12 that is not affected by twisting and may be joined to the surface of the slit.

Furthermore, in the above description, the slits 12x of the corrugated tube 12 communicate with the openings at both ends of the corrugated tube 12. However, the slits of the tube of the present invention are formed by deforming the vicinity of the slits by twisting. It suffices if the deformation of the outer shape of the coil can be suppressed. Therefore, slits may not be provided at locations that are not affected by torsion.

Furthermore, in the above description, the tube of the present invention is the corrugated tube 12 in which the annular grooves 12a and the ridges 12b formed along the circumferential side surface are alternately arranged along the extending direction. However, the tube of the present invention can be implemented in a tube having any shape and aspect as long as the slits penetrating the outer peripheral surface and the inner peripheral surface are formed along the extending direction. You may

INDUSTRIAL APPLICABILITY As described above, the present invention provides a covering structure for a wire harness, which includes a first tube having a plurality of cables inserted therein for connection to electrical components to be mounted on a vehicle, and a cable around the first tube . A coaxially formed second tube and an insulating coating coaxially formed on the outer circumference of the second tube are provided, and the first tube is a member formed in a cylindrical shape, the circumference of which is Annular recessed grooves and ridges formed along the side surfaces are arranged alternately along the direction of extension, and penetrate the inner and outer peripheral surfaces of the side walls and communicate with the openings at both ends of the side walls. The second tube has a slit used for insertion of a cable, and the second tube is a member configured as a wound structure of a sheet member, the sheet member slidably contacting the surface of the first tube. The first tube is wound in such a manner that it is not fixed, and the overlapping portion from the winding start end to the winding end is arranged at a position overlapping the slit of the first tube. , The insulating coating may cover the first tube as a tubular sleeve integrated by spirally winding the surface of the second tube. , applications, and configurations.

Therefore, the present invention may be practiced by adding various modifications to the above-described embodiment, including those described above, without departing from the gist of the present invention.

INDUSTRIAL APPLICABILITY The present invention as described above makes it possible to suppress twisting of wire harnesses with a simple and low-cost configuration, and is useful in application to wire harnesses in vehicles such as automobiles.

10 wire harness 11 cable 11a position 12 corrugated tube 12a concave groove 12b ridge 12x slit 13 twisted tube 13L sheet wrap portions 13a, 13b end portion 13s sheet member 14 insulation coatings 14a, 14b, 14c outline 15 connector 20 floor panel 21 floor portion 30 Driver's seat

Claims (2)

a first tube having a plurality of cables inserted therein for connection with electrical equipment to be mounted on the vehicle ;
a second tube coaxially formed around the outer circumference of the first tube;
and an insulating coating coaxially formed on the outer circumference of the second tube ,
The first tube is a member formed in a cylindrical shape, and annular grooves and ridges formed along the side surface forming the circumference are alternately arranged along the extending direction, and has a slit used for inserting the cable that penetrates the inner and outer peripheral surfaces and communicates with the openings at both ends,
The second tube is a member configured as a wound structure of a sheet member,
The sheet member is slidably brought into contact with the surface of the first tube, is wound in a manner that is not fixed to the first tube, and is between the winding start end and the winding end end. The overlapping portion is arranged at a position overlapping the slit of the first tube,
The insulating coating covers the first tube as a cylindrical sleeve integrally wound around the surface of the second tube in a spiral shape.
Wire harness covering structure. The cable exposed from the end of the first tube is connected to a connector for connecting with an electrical component mounted on the vehicle,
The connector is also secured in a fixed manner to the first tube.
The covering structure of the wire harness according to claim 1.

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