JP2012100460A - Wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure capable of firmly fixing a base end part of a branch wire to a protector, while suppressing complication of a shape of the protector.SOLUTION: A base end part of a branch wire 12 is inserted into a slit 31 of a rubber member 30. The rubber member 30 is fixed by being fitted into a branch wire storage part 212 of a protector 20. Thus, the base end part of the branch wire 12 can be easily and firmly fixed to the protector 20 without making the branch wire 12 take a detour. Additionally, the protector 20 does not have to be provided with a shape for making the branch wire 12 take the detour or a shape for winding a tape or a binding band. This suppresses the complication of the shape of the protector 20.

Description

  The present invention relates to a wire harness mounted on an automobile.

  There is known a wire harness that electrically connects electronic components and electrical components arranged in each part of an automobile. The wire harness has a branch structure in which a plurality of branch lines extend from the main line. Some wire harnesses have a protector for protecting the electric wires from surrounding members and improving the assemblability to the vehicle body. In the case where the branch line extends from the trunk line inside the protector, the base end portion of the branch line is fixed to the protector in order to guarantee the dimension of the branch line.

  Regarding the fixing of the branch line to the protector, Patent Document 1 describes that the round tube through the branch line is fixed to the fixing piece of the protector by tape winding. Patent Document 2 describes that an electric wire with an outer tube is fastened and fixed with a binding band at the exit of the protector. Patent Document 2 also describes a structure in which an electric wire with an outer tube is fixed by winding the electric wire with an outer tube around the tip of an inner wall provided in the protector.

Japanese Patent Laid-Open No. 11-162262 JP 2007-330005 A

  However, when a tape or a binding band is used, it is necessary to provide a portion around which the tape or the binding band is wound on the protector side. In addition, it is necessary to secure a work space for winding the tape and the binding band around the fixed portion of the protector. These elements are factors that complicate the shape of the protector.

  On the other hand, when the branch line is drawn out through the inner wall in the protector, the shape of the protector is complicated by providing the inner wall. In addition, it is considered that fixing the branch line may be insufficient by simply turning the branch line around the tip of the inner wall.

  Then, an object of this invention is to provide the structure which can fix the base end part of a branch line to a protector firmly, suppressing complication of the shape of a protector.

  1st invention of this application is a wire harness mounted in a motor vehicle, Comprising: The electric wire bundle which has a trunk line and the branch line branched from the said trunk line, and the protected part of the said trunk line, and branched from the said protected part A protector that accommodates the base end portion of the branch line, and a rubber member that fixes the base end portion of the branch line to the protector, and the rubber member includes a holding portion that pressurizes and holds the branch line. And is fixed to the protector.

  2nd invention of this application is a wire harness of 1st invention, Comprising: The said rubber member has the slit cut | disconnected along the branch line direction as the said holding | maintenance part, The said branch line in the said slit The individual electric wires constituting the are sandwiched.

  3rd invention of this application is a wire harness of 1st invention or 2nd invention, Comprising: The said protector has the accommodating part which accommodates the said rubber member, The said rubber member is a direction orthogonal to the said branch line at least. And having a dimension larger than the inner dimension of the receiving part.

  4th invention of this application is a wire harness in any one of 1st invention from 3rd invention, Comprising: The said rubber member is the rubber | gum side convex part which protruded toward the direction orthogonal to the said branch line, or the said branch line The protector has a protector-side recess that fits with the rubber-side protrusion or a protector-side protrusion that fits with the rubber-side recess.

  5th invention of this application is the wire harness of 4th invention, Comprising: The said rubber side convex part or the said rubber side recessed part is provided over the perimeter of the said rubber member.

  6th invention of this application is a wire harness in any one of 1st invention from 5th invention, Comprising: Between the said rubber member and the connector provided in the front-end | tip of the said branch wire, the said branch wire is coat | covered A tube is further provided, and both ends of the tube are in contact with the connector and the rubber member.

  7th invention of this application is a wire harness of 6th invention, Comprising: The said rubber member has a projection part inserted in the edge part by the side of the said rubber member of the said tube, The said projection part and the said protector In the middle, the end of the tube on the rubber member side is held.

  According to the first to seventh inventions of the present application, the base end portion of the branch line can be firmly fixed to the protector while suppressing the complexity of the shape of the protector.

  In particular, according to the second invention of the present application, the individual electric wires constituting the branch line are more reliably held.

  In particular, according to the third invention of the present application, the rubber member accommodated in the accommodating portion is more compressed. For this reason, the base end part of a branch line is hold | maintained more firmly.

  In particular, according to the fourth invention of the present application, it is possible to more reliably prevent the displacement of the rubber member in the branch line direction with respect to the protector.

  In particular, according to the fifth aspect of the present invention, partial deformation in the branch line direction of the rubber member can be suppressed.

  In particular, according to the sixth aspect of the present invention, it is possible to suppress a deviation in the branch direction of the tube between the connector and the rubber member.

  In particular, according to the seventh invention of the present application, the tube can be more firmly fixed to the protector.

It is a perspective view of a wire harness. It is a disassembled perspective view of a wire harness. It is a perspective view of a rubber member and a branch line. It is the side view which showed the mode when attaching a rubber member to a branch line. It is the side view which showed the mode when attaching a rubber member to a branch line. It is a perspective view of the rubber member and branch line concerning a modification. It is a partial top view of the protector with which the rubber member of FIG. 6 was attached. It is a perspective view of the rubber member and branch line concerning a modification.

  Embodiments of the present invention will be described below with reference to the drawings. In addition, below, the shape and positional relationship of each part are demonstrated, defining the up-down direction which makes the cover part 22 side up with respect to the lower box part 21 of the protector 20. FIG. However, this does not limit the installation posture when using the wire harness according to the present invention.

<1. Wire harness according to one embodiment>
1 and 2 are a perspective view and an exploded perspective view of a wire harness 1 according to an embodiment of the present invention. The wire harness 1 is mounted on an automobile and is used to electrically connect electronic components and electrical components arranged in each part of the automobile. As shown in FIGS. 1 and 2, the wire harness 1 of the present embodiment includes an electric wire bundle 10, a protector 20, a rubber member 30, and a tube 40.

  The electric wire bundle 10 is obtained by binding a plurality of electric wires for supplying power and communicating signals. The wire bundle 10 includes a trunk line 11 and a branch line 12 branched from the trunk line 11. In the present embodiment, the three electric wires 121 to 123 drawn out from the trunk line 11 constitute the branch line 12. A connector 13 connected to an electronic device is provided at the tip of the branch line 12.

  The protector 20 is a housing that accommodates the protected portion of the trunk line 11 and the proximal end portion of the branch line 12 and protects these portions from the peripheral members. The protector 20 includes a lower box portion 21 that accommodates the trunk line 11 and the branch line 12, and a lid portion 22 that closes the upper portion of the lower box portion 21. In the present embodiment, the lower box portion 21 and the lid portion 22 are integrally configured by resin molding. However, the lower box portion 21 and the lid portion 22 may be formed of separate members.

  The lower box portion 21 of the protector 20 includes a bowl-shaped trunk line accommodating part 211 and a bowl-shaped branch line accommodating part 212 extending in the other direction from the middle of the trunk line accommodating part 211. A substantially T-shaped accommodation space is formed inside the lower box portion 21 by the trunk line accommodation portion 211 and the branch line accommodation portion 212. The protected portion of the trunk line 11 is accommodated in the trunk line accommodating portion 211. Further, the branch line accommodating portion 212 accommodates the proximal end portion of the branch line 12 together with the rubber member 30 described later.

  On the outer side surface of the branch line accommodating portion 212, a latch receiving portion 23 that is latched with the claw portion 24 provided on the lid portion 22 is provided. When the lid portion 22 is closed, the lower box portion 21 and the lid portion 22 are fixed in a closed state by the locking of the claw portion 24 and the locking receiving portion 23.

  The rubber member 30 is a member for fixing the proximal end portion of the branch line 12 to the branch line accommodating portion 212 of the protector 20. The rubber member 30 can be made of, for example, ethylene propylene diene rubber (EPDM), acrylonitrile butadiene rubber (NBR), or silicone rubber. If these materials are used, elasticity and surface friction suitable for holding the branch line 12 can be obtained.

  FIG. 3 is a perspective view of the branch line 12 and the rubber member 30. As shown in FIG. 3, a slit 31 is formed in the rubber member 30. The slit 31 is formed by cutting the rubber member 30 from the upper surface to a predetermined depth along a plane defined by the branch line direction and the vertical direction. A proximal end portion of the branch line 12 is inserted into the slit 31 and held by the rubber member 30.

  The three electric wires 121 to 123 constituting the proximal end portion of the branch wire 12 are each sandwiched while being pressed by a pair of surfaces inside the slit 31. Thereby, a static friction acts between each electric wire 121-123 and a rubber member, and the position shift of each electric wire with respect to the rubber member 30 is suppressed. That is, in this embodiment, the slit 31 constitutes a holding portion that pressurizes and holds the proximal end portion of the branch line 12.

  In addition, grooves 32 that are recessed toward the inside of the rubber member 30 are provided on the upper surface, the lower surface, and the pair of side surfaces that extend in parallel with the branch line 12. The groove 32 is provided in an annular shape over the entire circumference of the rubber member 30. On the other hand, as shown in FIG. 2, the first rib 25 and the second rib 26 corresponding to the groove 32 of the rubber member 30 are provided in the branch line accommodating portion 212 and the lid portion 22 of the protector 20.

  When the rubber member 30 is fixed to the protector 20, the first rib 25 and the second rib 26 are fitted into the groove 32 of the rubber member 30. Thereby, the shift | offset | difference of the branch line direction of the rubber member 30 is prevented. In particular, in the present embodiment, the first rib 25 or the second rib 26 is fitted to almost all the portions of the groove 32 provided in an annular shape over the entire circumference of the rubber member 30. For this reason, partial deformation of the rubber member 30 in the branch line direction is also suppressed.

  In the present embodiment, the width dimension w1 of the rubber member 30 (the dimension in the horizontal direction perpendicular to the branch line 12) and the height dimension h1 are the width dimension w2 of the space secured inside the branch line accommodating portion 212 and Both are set slightly larger than the height dimension h2. For this reason, if the rubber member 30 is accommodated in the branch line accommodating part 212 and the cover part 22 is closed, the rubber member 30 will be in the state compressed in the width direction and the up-down direction. As a result, the base end portion of the branch line 12 is more firmly held in the slit 31 of the rubber member 30. Further, the displacement of the rubber member 30 itself with respect to the protector 20 is less likely to occur.

  As described above, in this embodiment, the rubber member 30 that pressurizes and holds the proximal end portion of the branch line 12 is fitted into the branch line accommodating portion 212 of the protector 20 and fixed. For this reason, the base end portion of the branch line 12 can be easily and firmly fixed to the protector 20 without detouring the branch line 12. Further, it is not necessary to provide the protector 20 with a shape for bypassing the branch line 12 or a shape for winding a tape or a binding band. Therefore, complication of the shape of the protector 20 is suppressed.

  The tube 40 is a substantially cylindrical exterior member that covers the branch line 12 between the rubber member 30 and the connector 13. For example, polyvinyl chloride is used as the material of the tube 40. As described above, the base end portion of the branch line 12 is held by the rubber member 30. Therefore, the length of the branch line 12 between the rubber member 30 and the connector 13 is fixed. Further, both end portions of the tube 40 are in contact with the rubber member 30 and the connector 13, respectively. Thereby, the shift | offset | difference of the branch line direction of the tube 40 is controlled.

  That is, the rubber member 30 of the present embodiment functions as a means for fixing the proximal end portion of the branch line 12 to the protector, and also as a means for fixing the position in the branch line direction of the tube 40 between the connector 13 and It is functioning.

  4 and 5 are side views showing a state when the rubber member 30 is attached to the branch line 12. FIG. When attaching a rubber member to the branch line 12, first, the proximal end portion of the branch line 12 is inserted into the slit 31 of the rubber member 30 (state of FIG. 4). Subsequently, the rubber member 30 is slid toward the tube 40 while maintaining the state where the branch line 12 is sandwiched between the slits 31. Thereby, the rubber member 30 and the connector 13 are brought into contact with both end portions of the tube 40, respectively (state shown in FIG. 5). The tube 40 is held while being sandwiched between the rubber member 30 and the connector 13.

<2. Modification>
Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment.

  FIG. 6 is a perspective view of a rubber member 30A according to a modification. The rubber member 30A in FIG. 6 includes a substantially rectangular parallelepiped main body 33A and a substantially cylindrical protrusion 34A that protrudes from the main body 33A toward the distal end side of the branch line 12A. A slit 31A for holding the branch line 12A is provided over both the main body 33A and the protrusion 34A.

  FIG. 7 is a partial top view of the protector 20A to which the rubber member 30A of FIG. 6 is attached. In this example, the protrusion 34A of the rubber member 30A is covered with the end of the tube 40A on the rubber member 30A side. And the edge part by the side of the rubber member 30A of the tube 40A is clamped between the 3rd rib 27A provided in the branch line accommodating part 212A of the protector 20A, and the projection part 34A of the rubber member 30A. If it does in this way, tube 40A can be fixed more firmly to protector 20A and rubber member 30A.

  In the above embodiment, the branch line 12 is configured by the three electric wires 121 to 123. However, the number of electric wires constituting the branch line may be one or two or four or more. In order to increase the number of electric wires that can be held, the slits of the rubber member may be cut into a cross shape or a T shape in a sectional view.

  Further, as shown in FIG. 8, a cylindrical cavity 35B extending in the branch line direction is provided inside the rubber member 30B, and a plurality of electric wires constituting the branch line 12B are held in the cavity 35B. Good. Even in such a form, if the diameter of the cavity 35B is designed to be slightly smaller than the bundle of electric wires, the bundle of electric wires can be pressed and held in the cavity 35B.

  However, if the branch line 12 is hold | maintained in the slit 31 like said embodiment, each electric wire 121-123 can be clamped between a pair of rubber | gum surfaces. For this reason, it is preferable at the point which can prevent the shift | offset | difference of each electric wire more reliably.

  In the above embodiment, the width dimension w1 and the height dimension h1 of the rubber member 30 are set to be larger than the inner diameter of the branch line accommodating portion 212. However, such a dimensional relationship is not necessarily required. Even if the size of the rubber member 30 is equal to or slightly smaller than the inner diameter of the branch wire accommodating portion 212, the rubber member 30 is deformed by inserting the branch wire 12 into the slit 31, and the reaction force causes the individual electric wires 121 to 123. May be held under pressure.

  Moreover, in said embodiment, the groove | channel 32 provided in the rubber member 30 side and the ribs 25 and 26 provided in the protector 20 side were fitted. However, a groove may be provided on the protector side, and a rib may be provided on the rubber member side to fit the two together.

  That is, the rubber member has a rubber-side convex portion protruding toward the direction orthogonal to the branch line or a rubber-side concave portion recessed toward the direction orthogonal to the branch line, and the protector is fitted to the rubber-side convex portion. What is necessary is just to have the protector side convex part fitted to the protector side recessed part or rubber | gum side recessed part. If these elements are provided, it is possible to prevent misalignment of the rubber member in the branch line direction with respect to the protector with high reliability.

  However, grooves and ribs are not necessarily provided on the surface of the rubber member. For example, the entire rubber member may be fitted between a pair of ribs provided on the protector side.

  The shape of the protector is not limited to the above example. The shape of the protector may be appropriately changed according to the shape of the wire bundle to be protected and the space in the vehicle.

  Moreover, the electric wire bundle may be composed of only a plurality of electric wires or may include an optical fiber.

  Moreover, you may combine suitably each element which appeared in said embodiment and modification in the range which does not produce inconsistency.

DESCRIPTION OF SYMBOLS 1 Wire harness 10 Wire bundle 11 Trunk line 12, 12A, 12B Branch line 121-123 Electric wire 13 Connector 20, 20A Protector 21 Lower box part 22 Lid part 23 Locking receiving part 24 Claw part 25 1st rib 26 2nd rib 27A 1st 3 ribs 30, 30A, 30B Rubber member 31, 31A Slit 32 Groove 33A Main body 34A Projection 35B Cavity 40, 40A Tube 211 Trunk housing 212, 212A Branch housing

Claims (7)

A wire harness mounted on an automobile,
An electric wire bundle having a main line and a branch line branched from the main line;
A protector for accommodating a protected portion of the trunk line and a proximal end portion of the branch line branched from the protected portion;
A rubber member for fixing the base end portion of the branch line to the protector;
With
The rubber member has a holding portion that pressurizes and holds the branch wire, and is a wire harness fixed to the protector. The wire harness according to claim 1,
The rubber member has a slit cut along the branch line direction as the holding portion,
A wire harness in which individual electric wires constituting the branch wire are sandwiched in the slit. The wire harness according to claim 1 or 2,
The protector has an accommodating portion for accommodating the rubber member,
The said rubber member is a wire harness which has a dimension larger than the internal dimension of the said accommodating part regarding the direction orthogonal to the said branch line at least. A wire harness according to any one of claims 1 to 3, wherein
The rubber member has a rubber-side convex portion projecting in a direction orthogonal to the branch line or a rubber-side concave portion recessed in a direction orthogonal to the branch line,
The protector is a wire harness having a protector side concave portion that fits with the rubber side convex portion, or a protector side convex portion that fits with the rubber side concave portion. The wire harness according to claim 4,
The rubber-side convex portion or the rubber-side concave portion is a wire harness provided over the entire circumference of the rubber member. A wire harness according to any one of claims 1 to 5, wherein
Between the rubber member and the connector provided at the tip of the branch line, further comprising a tube covering the branch line,
A wire harness in which both end portions of the tube are in contact with the connector and the rubber member. The wire harness according to claim 6,
The rubber member has a protrusion inserted into the end of the tube on the rubber member side,
A wire harness in which an end of the tube on the rubber member side is held between the protrusion and the protector.

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