JP2017077083A - Wiring harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiring harness with a protector capable of preventing occurrence of steep bending of small radius of curvature in a wire near the end of a protector, even if the bend angle of the wire becomes large.SOLUTION: In a wiring harness including a wire 12 with outer sheath, and a cylindrical protector 20 in which an insertion hole for inserting the wire is formed, the opening end of the protector 20 is constituted to include a division wall 26f, and a thin wall coupling part 27f for coupling the division wall 26f with respect to a main cylindrical part 25 so as to enable them to be rotationally displaced. When the wire 12 is bent and the division wall 26f is rotationally displaced radially outward, the corresponding thin wall coupling part 27f bends in that direction and forms a convex shape on the opening end side as well as the rotation angle of the division wall 26f exceeds a predetermined angle θ2, a bent guide 28 capable of abutting against the bending inner side of the wire at multiple places P1, P2 is formed in the vicinity of the thin wall coupling part 27f.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a wire harness, and more particularly to a wire harness with a protector.

  In a wire harness routed in an opening / closing part or other movable part of a vehicle such as an automobile, the covered electric wire passed through the protector may be repeatedly bent on the protector end part side. In that case, it is necessary to suppress wear and scratches on the coating protecting the electric wire against repeated bending.

  Therefore, conventionally, a guide surface that is gently curved while expanding outward from the inner surface of the hook-shaped portion is formed in the interference absorbing portion that is connected to the hook-shaped portion of the protector, and is insulated when the hard-coated wire is vibrated or bent. There is one in which the coating comes into contact with the guide surface of the interference absorbing portion (for example, see Patent Document 1).

  Moreover, what formed the guide surface which the insulation coating of a hard covering electric wire contacts is also known for the harness fixture which fixes a wire harness to the body of a vehicle (for example, refer patent document 2).

JP 2007-174852 A JP 2003-289618 A

  However, in the above-described conventional wire harness, when the electric wire is bent with a large bending angle, the covered electric wire that contacts the substantially entire length of the guide surface of the interference absorbing portion has a small curvature at the edge of the interference absorbing portion. There was a problem of bending at the radius. For example, when a wire harness with a protector is carried in and out of a hard case during transportation of the wire harness or at the setup stage before assembly, etc., when the wire is greatly bent near the end of the protector was there.

  In order to prevent the electric wire from being bent at the edge of the guide surface of the interference absorbing portion even when the bending angle of the electric wire is increased, the size of the protector with the interference absorbing portion is changed in the length direction and diameter of the electric wire. There is a problem that it is necessary to increase in each direction, and it becomes difficult to downsize and flatten the protector.

  The present invention has been made to solve such a conventional unsolved problem, and even when the bending angle of the electric wire with respect to the protector increases, the electric wire is suddenly bent with a small radius of curvature near the end of the protector. It aims at providing the wire harness with a protector which can prevent generating reliably.

  In order to achieve the above object, a wire harness according to the present invention is a wire harness including an electric wire and a cylindrical protector in which an insertion hole through which the electric wire is inserted is formed, wherein the insertion hole is opened. A cylindrical wall portion on the opening end side of the protector is arranged on the opening end side with respect to the main body portion of the protector, and a plurality of divided wall portions adjacent to each other in the circumferential direction of the protector, and radiation of the cylindrical wall portion The plurality of dividing wall portions are coupled to the main body portion of the protector so as to be rotatable and displaceable within a predetermined angle range on the outer side, and both the inner and outer side surfaces are connected to the plurality of dividing wall portions and the main body portion. A thin coupling portion having a groove-like concave shape, and the electric wire is bent with respect to the protector, and any one of the plurality of dividing wall portions is the cylindrical wall portion. Radiation outward The thin coupling portion corresponding to any one of the dividing wall portions is curved in the turning direction and has a convex shape on the opening end side, and any one of the dividing wall portions is the tube. When the angle of rotational displacement to the radially outward side of the wall-like wall exceeds a predetermined angle, the bent inner surface of the electric wire is placed in the vicinity of the thin-walled coupling portion that connects any one of the divided wall portions and the main body portion. A curved guide portion capable of contacting at a plurality of locations is formed.

  Therefore, in the present invention, even if a bending with a large bending angle is applied to the electric wire inserted through the protector, the bending that can contact the bending inner surface of the electric wire at a plurality of locations in the vicinity of the thin joint portion on the opening end side of the protector. By forming the guide portion, the bent inner surface of the electric wire is reliably prevented from being bent at a small radius of curvature at one corner. Moreover, while forming such a curved guide portion, the protector does not become large in each of the electric wire length direction and the electric wire radial direction, and it may be difficult to downsize or flatten the protector. Absent. Therefore, it becomes a wire harness with a protector which can prevent the sudden bending of a small curvature radius near the edge part of a protector even if the bending angle of an electric wire becomes large.

  In the wire harness of the present invention, the depth of the concave portions on the inner and outer surfaces where the thin joint portion forms the groove-like concave shape with respect to the plurality of divided wall portions and the main body portion is the inner surface side of the protector. It can be set as the structure which is large on either one side among outer surface sides, and is small on either other side among the said inner surface side and said outer surface side of the said protector.

  Moreover, it can be set as the structure which has a coupling | bond part which can be mutually couple | bonded by the said opening end side so that the said some dividing wall part may regulate the rotational displacement to the said radiation | emission outward side.

  Furthermore, a pair of opposing dividing wall portions among the plurality of dividing wall portions have a coupling portion that can be coupled to each other so as to restrict the rotational displacement toward the radially outward side. When the pair of divided wall portions are coupled to each other, the rotational displacement of the other divided wall portions other than the pair of divided wall portions toward the radial outward side is caused by the coupling portions of the pair of divided wall portions. It may be regulated.

  According to the present invention, there is provided a wire harness with a protector that can reliably prevent a sudden bending of a small curvature radius from occurring in the electric wire near the end of the protector even when the bending angle of the electric wire with respect to the protector increases. be able to.

It is a principal part external appearance perspective view of the wire harness with a protector which concerns on the 1st Embodiment of this invention. (A) is a principal part disassembled perspective view of the protector with which the wire harness which concerns on the 1st Embodiment of this invention is mounted | worn, (b) is a principal part perspective view of the protector. (A) is the vicinity of the thin-walled joint portion between any one of the plurality of divided wall portions of the protector attached to the wire harness according to the first embodiment of the present invention and the protector main body portion. (B) is a partial enlarged view of the vicinity of the thin-walled coupling portion when any one of the divided wall portions is rotationally displaced by a first bending angle toward the radial outward side of the cylindrical wall portion. It is sectional drawing. (A) is a second example in which any one of the dividing wall portions of the protector attached to the wire harness according to the first embodiment of the present invention is larger than the first bending angle radially outward of the cylindrical wall portion. It is a partial expanded sectional view of the vicinity of a thin coupling | bond part when it is rotationally displaced only by the bending angle of (b), (b) is the 2nd bending to the radiation | emission outward side of the cylindrical wall part of either of those division | segmentation wall parts. It is a partial expanded sectional view of the vicinity of a thin joint part when it is rotationally displaced only by the 3rd bending angle larger than an angle. It is a perspective view which shows the example of a state of the opening edge part at the time of transport of the protector with which the wire harness which concerns on the 1st Embodiment of this invention is mounted | worn. (A) is the vicinity of the thin-walled joint portion between any one of the plurality of divided wall portions of the protector attached to the wire harness according to the second embodiment of the present invention and the protector main body portion. (B) is a partial enlarged view of the vicinity of the thin-walled coupling portion when any one of the divided wall portions is rotationally displaced by a first bending angle toward the radial outward side of the cylindrical wall portion. It is sectional drawing. (A) is a second example in which any one of the dividing wall portions of the protector attached to the wire harness according to the second embodiment of the present invention is larger than the first bending angle radially outward of the cylindrical wall portion. It is a partial expanded sectional view of the vicinity of a thin coupling | bond part when it is rotationally displaced only by the bending angle of (b), (b) is the 2nd bending to the radiation | emission outward side of the cylindrical wall part of either of those division | segmentation wall parts. It is a partial expanded sectional view of the vicinity of a thin joint part when it is rotationally displaced only by the 3rd bending angle larger than an angle. It is a principal part disassembled perspective view of the protector with which the wire harness which concerns on the 3rd Embodiment of this invention is mounted | worn.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

(First embodiment)
The wire harness of 1st Embodiment is comprised as a wire harness with a protector for motor vehicles.

  As shown in FIG. 1, the wire harness 1 of the present embodiment has a connector 13 attached to an end portion of a sheathed wire 12 including a plurality of core wires 11 that are insulated and coated, for example. A protector 20 is attached so as to surround 12.

  That is, a specific length section of the wire harness 1 with the exterior tube 15 is housed in a substantially square cylindrical protector 20, and the specific length section of the wire harness 1 is protected by the protector 20. ing.

  The wire harness 1 is a unit obtained by mounting a plurality of connection terminals (not shown) on a plurality of core electric wires 11 and inserting the core electric wires 11 into terminal insertion holes of a connector 13 (connector housing). . The wire harness 1 is configured so that an electrical device mounted on the vehicle can be connected to a power source, a control device, or the like.

  Although the detailed structure of each of the core electric wires 11 is not illustrated, the plurality of core electric wires 11 have a linear conductor and a cylindrical covering surrounding the conductor. For example, the conductor is formed of a circular stranded wire formed by twisting strands of a plurality of annealed copper wires. Of course, it may be a single core wire instead of a stranded wire, or a plurality of conductor wires may be integrated by compression. The coating is made of a cylindrical insulating material made of a resin (synthetic resin) mainly composed of, for example, polyvinyl chloride or polyethylene.

  An outer tube 15 as a jacket is attached to the jacketed electric wire 12.

  The outer tube 15 is, for example, a sheath made of a vinyl chloride resin, or a flexible bellows tube made of an insulating resin such as polypropylene or nylon resin. The route can be regulated within the separation distance.

  The number of core wires 11 and the types of core wires 11 in the sheathed wire 12 are arbitrary, and the number of connectors 13 is also arbitrary.

  The sheathed electric wire 12 may be one in which a plurality of core electric wires 11 are loosely inserted into the outer tube 15 or may be one tubed wire electric wire or one shielded wire. However, due to the flexibility and elasticity of the outer tube 15, the wire harness 1 having the sheathed electric wire 12 can be bent or twisted.

  As shown in FIG. 2A and FIG. 2B, the protector 20 includes a protector main body 22 that forms a recess 21 in which the sheathed electric wire 12 can be stored, and an opening side of the recess 21 (FIG. 2 ( a) a lid portion 23 that can be opened and closed.

  As shown in FIG. 2 (b), the protector 20 is configured by a protector body 22 and a lid 23 to form a rectangular main tube 25 having a substantially square or rectangular cross section as a whole. Yes. Although the structure which couple | bonds the protector main-body part 22 and the cover part 23 mutually is arbitrary, a lock-type coupling | bonding can be employ | adopted, for example. Of course, the protector main body 22 and the lid 23 may be integrally formed so that the main cylindrical portion 25 is a single component, or the protector main body 22 and the lid 23 may be a pair of bowl-shaped components facing each other. Needless to say.

  The protector body 22 is made of a resin (synthetic resin) having a predetermined length that forms a groove-like recess 21 as a whole, and is formed so that its transverse cross section forms a substantially U-shaped recess. . The resin here is, for example, polypropylene or polyamide resin.

  By closing the open end of the recess 21 of the protector body 22 by the lid 23, the protector 20 is formed with an electric wire insertion hole 24 (insertion hole) corresponding to the recess 21, and the electric wire insertion hole 24. One opening end portion 26 that opens at one end and the other opening end portion that opens the other end of the wire insertion hole 24 that is not shown are formed.

  As shown in FIGS. 2A and 2B, the protector main body 22 is formed by molding the left and right side walls 22a and 22b into a shape that can be deployed on the same plane as the main body bottom wall 22e. It is bent in a direction perpendicular to the wall portion 22e to have a substantially U-shaped cross section. However, the left and right side walls 22a, 22b and the main body bottom wall portion 22e may be formed of separate parts that engage with each other in the vicinity of both end portions of the main body bottom wall portion 22e.

  The lid portion 23 is a resin-made plate body having a predetermined length that can be supported in a closed state by the left and right side walls 22a, 22b of the protector body portion 22, and is substantially the same as the substantially U-shaped protector body portion 22. Same width.

  Hereinafter, the configuration of one end side of the protector 20 having one open end portion 26 will be described in detail, and the description of the other end side having the same or similar configuration will be omitted.

  One open end portion 26 of the protector 20 is connected to one end side of the main cylindrical portion 25, and a short cylindrical wall portion (open end end) whose axial length is shorter than or equal to the diameter of the protector 20. Side cylindrical wall).

  The one opening end portion 26 is divided into a plurality of divided wall portions 26 a, 26 b, 26 e, and 26 f adjacent to the protector 20 in the circumferential direction and one end side of the main cylindrical portion 25 that is a main body portion of the protector 20. And a plurality of thin-walled coupling portions 27a, 27b, 27e, and 27f that couple the wall portions 26a, 26b, 26e, and 26f.

  The plurality of thin-walled coupling portions 27a, 27b, 27e, and 27f have groove-like concave shapes on both the inner and outer surfaces with respect to the main body portions 22M and 23M of the protector main body portion 22 and the lid portion 23 constituting the main cylindrical portion 25. In the axial direction of the main cylindrical part 25, the protector main body part 22 and the main parts 22M of the lid part 23 are arranged on the opening end side.

  The plurality of dividing wall portions 26a, 26b, 26e, and 26f are coupled to one end side of the main cylindrical portion 25 through the corresponding thin-walled coupling portions 27a, 27b, 27e, and 27f, thereby the main cylindrical portion. Each of the main cylindrical portions 25 can be rotated and displaced within a predetermined angle range on the radiation outer side 25.

  Specifically, as shown in FIG. 3A, the dividing wall portion 26f located on one end side of the lid portion 23 is the same as the main portion 23M of the lid portion 23 via the corresponding thin-walled coupling portion 27f. They are coupled so as to be capable of rotational displacement (angular displacement) in the vertical direction in the figure. Similarly, each of the dividing wall portions 26a, 26b, and 26e is rotated inward and outward in the radial direction of the main cylindrical portion 25 with respect to the main portion 22M of the protector main body portion 22 through the corresponding thin-walled connecting portions 27a, 27b, and 27e. It is coupled so that it can be displaced.

  Then, the sheathed electric wire 12 is bent with respect to the protector 20, and any one of the plurality of divided wall portions 26a, 26b, 26e, and 26f, for example, the divided wall portion 26f is the radial outside of the main cylindrical portion 25. When the wall is displaced to the side, the thin coupling portion 27f corresponding to the dividing wall portion 26f is curved in the rotating direction of the dividing wall portion 26f and gradually forms a convex shape toward the opening end side. 4A is larger than a predetermined angle, for example, the first bending angle θ1 in FIG. 3B, by which the dividing wall portion 26f rotates and displaces radially outward of the main cylindrical portion 25. When the second bending angle θ2 is exceeded, in the vicinity of the thin-walled coupling portion 27f corresponding to the divided wall portion 26f, a curved guide portion 28 that can come into contact with the bending inner side surface 12s of the sheathed electric wire 12 at a plurality of locations. It is supposed to be formed.

  In the bending guide portion 28, an external force is applied to the outer sheathed electric wire 12 protruding from one opening end portion 26 in the bending direction of the main tubular portion 25 toward the radial outer side, and the bending angle of the outer sheathed electric wire 12 is increased. Is increased, the contact point of the bending inner side surface 12s, which is a fulcrum of bending of the sheathed electric wire 12, is sequentially increased or moved to the protruding end side (connector 13 side). Further, the curved guide portion 28 holds the curvature radius Rw of the bending inner side surface 12s of the sheathed electric wire 12 at a value larger than the radius R1 equal to the wall thickness T1 of the main cylindrical portion 25, and The function of reducing the bending angle of the sheathed electric wire 12 on the distal end side with respect to the contact portion P1, P2 or P3 closest to the protruding end is exhibited.

  Specifically, for example, when an external force is applied to the outer sheathed electric wire 12 in the bending direction of the main tubular portion 25 toward the radial outward direction, and the bending angle of the outer sheathed electric wire 12 increases, The contact point with the bending inner side surface 12 s serving as a bending fulcrum is that the radius of curvature of the sheathed electric wire 12 is sufficiently large at the first bending angle θ1 shown in FIG. Only P1.

  When the bending angle of the covered wire 12 reaches the second bending angle θ2 shown in FIG. 4A, for example, about 90 degrees, if the radius of curvature of the covered wire 12 is still large, The abutting location that becomes a fulcrum of bending moves from the first abutting location P1 to the second abutting location P2, and the first abutting location becomes smaller when the radius of curvature of the sheathed electric wire 12 becomes smaller. It increases to P1 and 2nd contact location P2. At this time, the radius of curvature Rw of the sheathed electric wire 12 between the first contact point P1 and the second contact point P2 is maintained at a value larger than the radius R1 equal to the wall thickness T1 of the main tubular portion 25. Is done. In addition, the bending angle of the sheathed electric wire 12 on the distal end side from the contact portion P2 closest to the protruding end of the sheathed electric wire 12 is reduced as compared with the case where the contact portion P1 is a bending fulcrum.

  When the bending angle of the covered wire 12 reaches a third bending angle θ3 larger than the second bending angle θ2, for example, an angle close to 180 degrees as shown in FIG. 4B, the curvature of the covered wire 12 If the radius is still large, the abutting location that is a fulcrum of bending of the sheathed electric wire 12 moves from the second abutting location P2 to the third abutting location P3, and the radius of curvature of the sheathed electric wire 12 is increased. If it becomes small, it will increase to the 1st contact location P1, the 2nd contact location P2, and the 3rd contact location P3. At this time, the radius of curvature Rw of the sheathed electric wire 12 between the first contact point P1 and the third contact point P3 is larger than the radius R1 equal to the wall thickness T1 of the main tubular portion 25. Retained. In addition, the bending angle of the sheathed electric wire 12 on the distal end side from the contact portion P2 closest to the protruding end of the sheathed electric wire 12 is reduced as compared with the case where the contact portion P1 is a bending fulcrum.

  The axial length and the bending rigidity of the plurality of thin coupling portions 27a, 27b, 27e, and 27f are set so that the function of the curved guide portion 28 can be obtained.

  Specifically, as shown in FIG. 3A, the thin-walled coupling portions 27a, 27b, 27e, and 27f are groove-shaped with respect to the plurality of dividing wall portions 26a, 26b, 26e, and 26f and the main cylindrical portion 25. The recesses 27c and 27d on both the inner and outer sides forming the concave shape are set such that the widths w1 and w2 in the wire length direction are larger than the wall thickness T1 of the main cylindrical portion 25, for example, twice the wall thickness T1. Yes.

  Further, the recesses 27c and 27d on both the inner and outer surfaces are provided on either the inner wall surface 25a side or the outer wall surface 25b side (the inner surface side or outer surface side of the protector 20) of the main cylindrical portion 25, for example, on the inner wall surface 25a side. The depth d1 of the recess 27c is large, and the depth d2 of the recess 27d on either the inner wall surface 25a side or the outer wall surface 25b side, for example, the outer wall surface 25b side, is small. Of course, the depths d1 and d2 of the recesses on both the inner and outer surfaces may be the same.

  Further, the thickness h of the thin-walled joint portions 27a, 27b, 27e, and 27f is equal to each of the divided wall portions 26a, 26b, 26b, 26e, 26f and the both ends close to the main cylindrical portion 25. 26e, 26f and the main cylindrical portion 25 become larger, and at a center side away from each divided wall portion 26a, 26b, 26e, 26f and the main cylindrical portion 25, a constant width value sufficiently smaller than the wall thickness T1 is obtained. It has become.

  The plurality of divided wall portions 26a, 26b, 26e, and 26f have coupling portions 29 that can be coupled to each other on the open end side so as to mutually restrict the rotational displacement of each of the radially outward sides.

  The coupling portion 29 is attached to, for example, a pair of divided wall portions 26e and 26f facing each other among the plurality of divided wall portions 26a, 26b, 26e, and 26f. The coupling portion 29 includes a pair of lock claws 29a and 29b formed integrally with the split wall portion 26e on the bottom wall side, and a split wall portion on the lid portion 23 side so as to be able to be engaged with the pair of lock claws 29a and 29b. It is composed of a pair of lock receiving portions 29c and 29d formed integrally with 26f. The pair of lock claws 29a and 29b may be hinge-coupled so as to be rotatable with respect to the dividing wall portion 26e on the bottom wall side.

  When the plurality of divided wall portions 26e and 26f are coupled to each other via the pair of lock claws 29a and 29b and the pair of lock receiving portions 29c and 29d, other than the pair of divided wall portion divided wall portions 26e and 26f. The rotational displacement of the other divided wall portions 26a, 26b to the radially outward side is regulated by the coupling portion 29 of the pair of divided wall portions 26e, 26.

  Needless to say, the coupling method of the plurality of divided wall portions 26a, 26b, 26e, and 26f by the coupling portion 29 is not limited to such a locking method.

  Next, the operation will be described.

  In the wire harness 1 of the present embodiment configured as described above, even if a large bending angle is applied to the outer sheathed electric wire 12 with the outer tube 15 inserted through the protector 20, the open end of the protector 20 is open. The bending inner side surface 12s of the sheathed electric wire 12 is guided to a radius of curvature Rw equal to or greater than the thickness T1 of the main tubular portion 25 by the curved guide portion 28 formed on the portion 26 side. Therefore, the electric wire 12 with the jacket of the wire harness 1 is reliably prevented from being bent at a small radius of curvature near the fulcrum of bending.

  In addition, while the curved guide portion 28 is formed at the opening end portion 26 of the protector 20, the protector 20 is different in the electric wire length direction and the electric wire radial direction as compared with the conventional case where the interference absorbing portion having a large curvature radius is extended. It does not become large, and its miniaturization and flattening are facilitated.

  Furthermore, in the present embodiment, the depth d1 of the concave portion 27c on the inner wall surface 25a side of the main cylindrical portion 25 is large on the inner and outer surfaces of the thin joint portions 27a, 27b, 27e, 27f in the curved guide portion 28, and the outer wall surface The depth d2 of the recess 27d on the 25b side is small. Therefore, as shown in FIG. 3A, the interval between the contact points P1 and P2 when the bending angle increases can be increased, and the curvature radius Rw can be increased.

  Further, since the plurality of divided wall portions 26a, 26b, 26e, and 26f have the coupling portions 29 that can be coupled to each other on the opening end side so as to restrict the rotational displacement to the radially outward side, the wire harness As shown in a typical example in FIG. 5, the lock of the coupling portion 29 is set in an unlocked state (released state) during transportation of 1, and the coupling portion 29 is locked in a state of being mounted on a vehicle so that a required protector function is exhibited. be able to.

  Furthermore, in this embodiment, when the rotational displacement of the pair of divided wall portions 26e, 26f to the radially outward side is restricted by the coupling portion 29, the other divided wall portions 26a, 26b toward the radially outward side. Since the rotational displacement is regulated by the coupling portion 29, it is not necessary to provide a lock mechanism or the like on the other divided wall portions 26a, 26b, and the structure of the protector 20 can be simplified.

  As described above, in this embodiment, even when the bending angle of the sheathed electric wire 12 with respect to the protector 20 is increased, the sheathed electric wire 12 is suddenly bent with a small curvature radius in the vicinity of the opening end portion 26 of the protector 20. The wire harness 1 with a protector which can prevent reliably generating can be provided.

(Second Embodiment)
6 and 7 show a wire harness with a protector according to the second embodiment of the present invention. The wire harness of the present embodiment is the same as that of the first embodiment except that the configuration of the bending guide portion of the protector 20 is changed, and hence the following difference from the first embodiment. Only the points to be described will be described in detail.

  As shown in FIGS. 6A and 6B, in the present embodiment, the arrangement of the thin coupling portions 37a, 37b, 37e, and 37f in the curved guide portion 38 of the protector 20 is biased inward in the electric wire radial direction. Therefore, the corresponding arrangement is different from the first embodiment in which the corresponding arrangement is biased to the outside in the electric wire radial direction.

  That is, the depth d3 of the concave portion 37c located on the inner wall surface 25a side of the main cylindrical portion 25 is small on any of the thin-walled joint portions 37a, 37b, 37e, and 37f, for example, both inner and outer surfaces of the thin-walled joint portion 37f, The depth d4 of the recessed part 37d located in the outer wall surface 25b side is large.

  Further, in the recesses 37c and 37d, the widths w3 and w4 in the electric wire length direction are set to be about twice the wall thickness T1 of the main cylindrical portion 25.

  In the curved guide portion 38 having such thin-walled coupling portions 37a, 37b, 37e, and 37f and concave portions 37c and 37d, the outer tubular casing 25 is exposed to the outside of the main tubular portion 25 from the sheathed electric wire 12 protruding from one opening end portion 26. When an external force is applied in the bending direction toward the side and the bending angle of the covered wire 12 increases, the contact point of the bending inner side surface 12s of the covered wire 12 comes into contact from a stage where the bending angle is relatively small. There are two places (plural places) of places P1 and P2. Each thin joint portion 37a, 37b, 37e, and 37f can sufficiently exert the axial force in the length direction of the electric wire when it is bent as shown in FIG. The shape can be elastically deformed in the direction of increasing the radius of curvature.

  Specifically, for example, when an external force is applied to the outer sheathed electric wire 12 in the bending direction of the main tubular portion 25 toward the radial outward side, and the bending angle of the outer sheathed electric wire 12 increases, FIG. At the first bending angle θ1 of less than 90 degrees shown, the radius of curvature of the covered wire 12 is sufficiently large, and the contact location of the bending inner side surface 12s of the covered wire 12 is the first contact location P1. And it becomes two places of the 2nd contact location P2 on the thin connection part 37f.

  When the bending angle of the sheathed electric wire 12 reaches the second bending angle θ2 shown in FIG. 7A, for example, about 90 degrees, if the radius of curvature of the sheathed electric wire 12 is still large, The abutting location serving as a bending fulcrum moves from the first abutting location P1 to the second abutting location P2. At this time, the radius of curvature Rw of the sheathed electric wire 12 between the first contact point P1 and the second contact point P2 is maintained at a value larger than the radius R1 equal to the wall thickness T1 of the main tubular portion 25. Is done. Further, the bending angle of the sheathed electric wire 12 on the tip side of the contact portion P2 or P3 closest to the protruding end of the sheathed electric wire 12 is reduced as compared with the case where the contact portion P1 is a fulcrum of bending. .

  When the bend angle of the sheathed electric wire 12 reaches a third bend angle θ3 larger than the second bend angle θ2, for example, a third bend angle of about 120 degrees as shown in FIG. If the radius of curvature of the jacketed electric wire 12 is still large as indicated by a two-dot chain line, the abutting location that serves as a bending fulcrum of the sheathed electric wire 12 remains the second abutting location P2.

  On the other hand, as shown by the solid line in the figure, when the radius of curvature of the sheathed electric wire 12 is reduced, the dividing wall portion is formed at either end of the curved thin joint portion, for example, the thin joint portion 37f. 26f and the main cylindrical portion 25 are in contact with each other at the corner portions 25r, 26r, the curvature radius of the thin coupling portion 37f is ensured to be equal to or greater than a predetermined value, and the contact portion of the sheathed electric wire 12 is the first. It increases to one contact point P1, second contact point P2, and third contact point P3.

  At this time, the radius of curvature Rw of the sheathed electric wire 12 between the first contact point P1 and the third contact point P3 is larger than the radius R1 equal to the wall thickness T1 of the main tubular portion 25. Retained. Further, the bending angle of the sheathed electric wire 12 on the tip side from the contact portion P3 closest to the protruding end of the sheathed electric wire 12 is reduced as compared with the case where the contact portion P1 is a bending fulcrum.

  Also in this embodiment, even when the bending angle of the sheathed electric wire 12 with respect to the protector 20 is increased, it is ensured that a sudden bending with a small curvature radius occurs in the sheathed electric wire 12 in the vicinity of the opening end portion 26. The wire harness 1 with the protector which can be prevented can be provided.

(Third embodiment)
FIG. 8 shows a main part of a wire harness with a protector according to the third embodiment of the present invention. The wire harness of the present embodiment is the same as that of the first embodiment except that the configuration of the connecting portion of the plurality of divided wall portions in the protector 20 is changed.

  As shown in FIG. 8, in the present embodiment, the open end of the protector 20 has a plurality of dividing wall portions 26 a, 26 b, 26 e, and 26 f so as to mutually restrict the rotational displacement of each of the radially outward sides. A coupling part 39 which can be coupled to each other on the side is mounted.

  The coupling portion 39 is attached to, for example, a pair of divided wall portions 26e and 26f facing each other among the plurality of divided wall portions 26a, 26b, 26e, and 26f.

  Specifically, the coupling portion 39 is formed on the bottom wall side so that it can be engaged with a pair of lock claws 39a and 39b formed integrally with the dividing wall portion 26f on the lid portion 23 side, and the pair of lock claws 39a and 39b. And a pair of lock receiving portions 39c and 39d formed integrally with the divided wall portion 26e. When the plurality of divided wall portions 26e and 26f are coupled to each other via the pair of lock claws 39a and 39b and the pair of lock receiving portions 39c and 39d, other than the pair of divided wall portion divided wall portions 26e and 26f. The rotational displacement of the other divided wall portions 26a, 26b to the radially outward side is regulated by the coupling portion 39 of the pair of divided wall portions 26e, 26f.

  Also in this embodiment, the same effect as that of the first embodiment can be obtained.

  In each of the above-described embodiments, the protector has a rectangular cross section, but the cross section may be a rounded bowl shape instead of a polygon. Moreover, although the opening edge part was made into the edge part of an axial direction, the opening edge part in which the opening part was formed in the middle of the bending shape or the curve shape may be sufficient. The coupling portions 29 and 39 may be configured as bands or other separate parts for binding the plurality of divided wall portions 26a, 26b, 26e, and 26f, and correspond to separate parts for binding on the outer peripheral side of the opening end portion 26. You may have a groove.

  As described above, the present invention provides a wire with a protector that can reliably prevent a sudden bend with a small curvature radius from occurring in the vicinity of the end of the protector even if the bend angle of the wire with respect to the protector increases. The harness can be provided, and is useful for all wire harnesses with a protector.

DESCRIPTION OF SYMBOLS 1 Wire harness 12 Covered electric wire 12s Bending inner surface 20 Protector 24 Electric wire insertion hole 25 Main cylindrical part (main part of a protector)
26 Open end (cylindrical wall on the open end)
26a, 26b, 26e, 26f Dividing wall portions 27a, 27b, 27e, 27f, 37a, 37b, 37e, 37f Thin-walled connecting portions 27c, 27d, 37c, 37d Recessed portions 28, 38 Curved guide portions 29, 39 Connecting portions 29a, 29b , 39a, 39b Lock claw 29c, 29d, 39c, 39d Lock receiving portion d1, d2, d3, d4 Depth of recess P1 First contact point P2 Second contact point P3 Third contact point Rw Bending Inner radius of curvature T1 Wall thickness w1, w2, w3, w4 Recess width θ1, θ2, θ3 Bending angle

Claims (4)

A wire harness comprising an electric wire and a cylindrical protector in which an insertion hole for inserting the electric wire is formed,
A plurality of dividing wall portions adjacent to each other in the circumferential direction of the protector while the cylindrical wall portion on the opening end side of the protector that opens the insertion hole is disposed on the opening end side with respect to the main body portion of the protector, respectively. The plurality of divided wall portions are coupled to the main body portion of the protector so as to be rotatable and displaceable within a predetermined angle range on the radially outward side of the cylindrical wall portion, and the plurality of divided wall portions and the main body portion And a thin-walled coupling portion having a groove-like concave shape on both the inner and outer surfaces, and the electric wire is bent with respect to the protector, and any one of the plurality of dividing walls When the portion is pivotally displaced radially outward of the cylindrical wall portion, the thin coupling portion corresponding to any one of the divided wall portions is curved in the turning direction and has a convex shape on the opening end side. None, any one of the dividing walls When the angle of rotational displacement toward the radially outward side of the cylindrical wall portion exceeds a predetermined angle, the bending of the electric wire is performed in the vicinity of the thin-walled coupling portion connecting any one of the divided wall portions and the main body portion. The wire harness characterized by the curved guide part which can be contact | abutted in multiple places on the inner surface.   The depth of the recesses on both the inner and outer surfaces where the thin-walled coupling portion forms the groove-like concave shape with respect to the plurality of dividing wall portions and the main body portion is either the inner surface side or the outer surface side of the protector. The wire harness according to claim 1, wherein the wire harness is large on one side and small on the other side of the inner surface side and the outer surface side of the protector.   The said some division wall part has the coupling | bond part which can be mutually couple | bonded by the said opening end side so that the rotational displacement to the said radiation outward side may be controlled. The wire harness according to 2.   A pair of opposing partition walls among the plurality of partition walls have a coupling part that can be coupled to each other so as to restrict the rotational displacement toward the radially outward side. When the divided wall portions are coupled to each other, the rotational displacement of the other divided wall portions other than the pair of divided wall portions to the radial outward side is restricted by the coupling portions of the pair of divided wall portions. The wire harness according to claim 3.

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