JP6428284B2 - Wire harness wiring structure - Google Patents

Description

  The present invention relates to a wire harness routing structure in which an annular member is disposed between a corrugated tube and a wire harness.

  Patent Document 1 discloses a corrugated tube composed of two layers of an uneven outer layer and a cylindrical inner layer. The inner layer of the corrugated tube is formed flat and joined to the inwardly protruding portion of the outer layer. In patent document 1, fluid resistance, such as an organic solvent, is suppressed by providing an inner layer in a corrugated tube.

  Patent Literature 2 discloses a harness exterior protection member including a bellows tube portion and a straight tube portion. The inner peripheral surface of the bellows tube portion is formed with irregularities, and the inner peripheral surface of the straight tube portion is formed flat. The straight pipe portion can increase the bending rigidity by flattening the inner peripheral surface.

  Patent Document 3 discloses that a wire harness is fixed by applying an adhesive or an adhesive to the inner peripheral surface of a corrugated tube.

JP 2004-351678 A JP 2013-176211 A JP 2006-246655 A

  The corrugated tube is formed in a bellows shape that can be expanded and contracted or bent so as to route the wire harness, and has an unevenness on the inner peripheral surface. If all the inner peripheral surfaces of the corrugated tube are flattened as disclosed in Patent Documents 1 and 2, the corrugated tube is difficult to expand and contract or bend.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a wire harness routing structure that suppresses the corrugated tube from being easily deformed while suppressing the contact between the corrugated tube and the wire harness. There is to do.

In order to solve the above problems, a wire harness routing structure according to an aspect of the present invention includes a wire harness, a corrugated tube having a slit for inserting the wire harness, and an inner side of the corrugated tube and an outer side of the wire harness. An annular member. Annular member has an annular body portion, and the inner peripheral surface of the smoothly formed the main body portion, and the projection projecting from the outer peripheral surface of the body portion in a radial direction, the main body portion is located in the projection It extends more in the axial direction, and the protrusion engages with the peak of the corrugated tube.

  According to this aspect, the contact between the corrugated tube and the wire harness can be suppressed by the annular member. Moreover, it can suppress that a corrugated tube becomes difficult to deform | transform by arrange | positioning an annular member partially with respect to a corrugated tube.

  ADVANTAGE OF THE INVENTION According to this invention, the wire harness wiring structure which suppressed that it becomes difficult to deform | transform a corrugated tube, suppressing the contact with a corrugated tube and a wire harness can be provided.

It is a figure for demonstrating the wire harness wiring structure which attached the annular member to the corrugated tube. It is a figure for demonstrating the state which attached the wire harness to the corrugated tube, without using an annular member. FIG. 3A is a perspective view of the annular member of the embodiment, and FIG. 3B is a perspective view of the annular member of the modified example.

  FIG. 1 is a view for explaining a wire harness wiring structure 1 in which an annular member 10 is attached to a corrugated tube 30. FIG. 1 is a cross-sectional perspective view of the corrugated tube 30 and the annular member 10 and shows a holding state of the internal wire harness 40. For example, the wire harness 40 is an electric wire covered with a coating. Since the resin corrugated tube 30 has a bellows shape, peaks 32 and valleys 34 are alternately formed on the inner peripheral surface. In addition, the peak part 32 is convex shape seen from the outer side of the corrugated tube 30, and the trough part 34 is concave shape.

  A slit is formed in the corrugated tube 30 along the axial direction. By expanding the edge of the slit of the corrugated tube 30, the annular member 10 and the wire harness 40 can be inserted inside the corrugated tube 30. That is, the corrugated tube 30 is formed so as to be openable and closable by the slit in order to insert the annular member 10 and the wire harness 40.

  The annular member 10 is located between the corrugated tube 30 and the wire harness 40, and is located inside the corrugated tube 30 and outside the wire harness 40. By arranging the annular member 10 inside the corrugated tube 30 and surrounding the wire harness 40 of the vehicle, the contact between the corrugated tube 30 and the wire harness 40 can be suppressed. Here, the case where the annular member 10 is not attached to the corrugated tube 30 will be described as a comparative example.

  FIG. 2 is a view for explaining a state in which the wire harness 40 is attached to the corrugated tube 30 without using the annular member. The wire harness 40 shown in FIG. 2 contacts the corrugated tube 30 and directly contacts the valley 34. The trough 34 has a shorter axial length than the annular member 10 shown in FIG.

  Returning to FIG. In the wiring routing structure 1 of the embodiment, the wire harness 40 does not contact the valley portion 34 of the corrugated tube 30 but contacts the inner peripheral surface of the annular member 10. Since the inner circumferential surface 12 of the annular member 10 is longer in the axial direction than the trough 34, the contact area with the wire harness 40 can be increased and the annular member 10 can be attached rather than contacting the wire harness 40 with the trough 34. The load per unit area on the wire harness 40 at the raised portion can be reduced. The shape of the annular member 10 will be specifically described with reference to a new drawing.

  FIG. 3A is a perspective view of the annular member 10 of the embodiment. The annular member 10 includes an annular main body 11 and a protrusion 16 that protrudes radially outward from the outer peripheral surface 14 of the main body 11. The main body 11 is formed in a cylindrical shape from a resin material. The inner peripheral surface 12 of the main body 11 is smoothly formed without unevenness.

  The protrusion 16 is formed in an annular shape over the circumferential direction of the outer peripheral surface 14. A plurality of protrusions 16 are formed so as to be aligned in the axial direction according to the interval between the peaks 32 of the corrugated tube 30. The protrusion 16 is formed in a tapered shape so that the cross section tapers toward the tip. The annular member 10 is integrally formed, for example, by die-cutting and formed as one part.

  By making the annular member 10 separate from the corrugated tube 30, the annular member 10 can be freely arranged with respect to the corrugated tube 30. For example, the annular member 10 can be arranged at intervals of 10 centimeters in the corrugated tube 30 at a place where the vibration of the vehicle is large, and the annular member 10 can be freely arranged at a place where the vibration is small. By disposing the annular member 10 in the corrugated tube 30 so as to be spaced apart from each other, the crest portion 32 of the corrugated tube 30 that does not engage with the annular member 10 remains with the annular member 10 interposed therebetween. It can suppress that a bending deformation is prevented.

  Moreover, since the contact with the corrugated tube 30 and the wire harness 40 can be suppressed without modifying the corrugated tube 30 conventionally used by attaching the annular member 10 to the corrugated tube 30, the cost can be suppressed.

  In the embodiment, the two protrusions 16 are provided so as to be accommodated in the adjacent peak portions 32. The number of the protrusions 16 is not limited to two, and may be one or three or more, and the annular member 10 is set so as not to inhibit expansion and contraction and bending deformation of the corrugated tube 30. Thereby, the annular member 10 can be disposed at a necessary portion of the corrugated tube 30.

  In the attached state of the annular member 10, as shown in FIG. 1, the plurality of protrusions 16 are respectively engaged and engaged with the peak portions 32 of the corrugated tube 30. Thereby, the relative movement of the annular member 10 and the corrugated tube 30 in the axial direction is restricted, and the annular member 10 is displaced in the axial direction when the plurality of annular members 10 are arranged inside the corrugated tube 30 at a predetermined interval. It can be suppressed.

  FIG. 3B is a perspective view of an annular member 100 according to a modification. The annular member 100 of the modified example shown in FIG. 3B is provided by a pair of halves 120. The annular member 10 in FIG. 3A cannot divide the main body 11, whereas the annular member 100 in FIG. 3B can insert the wire harness 40 from the crack 118.

  The annular member 100 has the same shape as the annular member 10 of FIG. 3A by combining the pair of halves 120. The annular member 100 includes a main body 111, a smooth inner peripheral surface 112 without unevenness, a protrusion 116 formed on the outer peripheral surface 114, and a hinge 122 that couples the pair of halves 120. The hinge 122 is formed integrally with the half body 120 and is formed thinner than the main body 111 so as to be easily bent. In another modified example, the annular member 100 is not provided with a hinge, and the pair of halves 120 may be separated.

  The present invention is not limited to the above-described embodiments and modifications, and various modifications such as design changes can be added based on the knowledge of those skilled in the art. The configuration shown in each drawing is for explaining an example, and can be appropriately changed as long as the configuration can achieve the same function.

  DESCRIPTION OF SYMBOLS 1 Wire harness wiring structure, 10 annular member, 11 main-body part, 12 inner peripheral surface, 14 outer peripheral surface, 16 protrusion, 30 corrugated tube, 32 trough part, 34 peak part, 40 wire harness, 100 annular member, 111 main body Part, 112 inner peripheral surface, 114 outer peripheral surface, 116 protrusion, 118 crack, 120 halves, 122 hinge.

Claims (1)

A wire harness,
A corrugated tube having a slit for inserting the wire harness;
An annular member disposed inside the corrugated tube and outside the wire harness,
The annular member is
An annular body,
An inner peripheral surface of the main body formed smoothly;
A protrusion protruding radially from the outer peripheral surface of the main body ,
The main body extends in the axial direction from the position of the protrusion,
The wire harness routing structure, wherein the protrusion is engaged with a peak portion of the corrugated tube.

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