JPH0716522U - Corrugated tube for wire harness - Google Patents

Abstract

(57) [Abstract] [Purpose] In a corrugated tube for wire harness having a slit opening 4 formed by continuously connecting a ridge ring portion 1 having a U-shaped cross section open to the inside of the tube, from the slit opening 4 No special waterproofing measures are required to prevent the infiltration of water, and the cost is reduced and the workability of installation on the vehicle body is improved. [Structure] At the center of the mountain portion 2 of the ridge ring portion 1 in the width direction,
The structure is characterized in that a group of drain holes 6 arranged with a required pitch in the circumferential direction is provided, and the water from the slit port 4 is drained by gravity from the drain holes 6 located below.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a corrugated tube for a wire harness used to house and protect a wire group of a wire harness and dispose the wire group on a vehicle body or the like.

[0002]

[Prior art]

 The conventional corrugated tube for wire harness has a ridge ring with a U-shaped cross section whose concentric circle with the outer circumference and the opening faces the inside of the tube in order to fulfill the flexibility of wiring harness arrangement and the function of protecting the stored wires. The part has a structure in which a tube body is continuously arranged at a required pitch, and a bundle of electric wires is put in and stored from a slit opening cut in the longitudinal direction of the tube body for use. To prevent the rainwater and car wash water from infiltrating into the tube from its slit after it has been mounted on the vehicle body, and causing an obstacle to the wire bundle, tape around the outer circumference of the corrugated tube in the wire bundle storage state. Waterproofing measures such as wrapping and closing the slit part are performed, or the slit part is restricted to the lower side when mounted on the vehicle body to prevent water infiltration. Has been.

[0003]

[Problems to be solved by the device]

 The former type of waterproofing measures for the conventional corrugated tube for wire harness, such as tape wrapping, is a manual work of storing the bundle of wires and winding the tape wrapping around a long and heavy corrugated tube. Since it is necessary, it requires a lot of troubles and is inefficient, and the cost is high, which is a problem against the high productivity of mass production of wire harness in recent years. Further, the latter waterproof measure for restricting the slit opening downward regulates the slit portion downward when arranging the wire harness in a curved bending three-dimensional posture in a narrow allowable space. This makes the work of arranging the wire harness on the vehicle body extremely difficult and causes the workability of arranging it to be significantly reduced. The present invention provides a corrugated tube for a wire harness that solves the above-mentioned problems of the prior art.

[0004]

[Means for Solving the Problems]

 The corrugated tube for a wire harness of the present invention that solves the above technical problem is a tube body in which a ridge ring portion having a U-shaped cross-section that opens into the tube is connected to the outer periphery at the required pitch in the tube longitudinal direction. None, in a corrugated tube for wire harness that accommodates electric wire groups from a slit opening cut in the longitudinal direction of the tube, arrange on the tube wall of the peak or valley of the ridge ring with a required pitch in the circumferential direction. It has a structure with a group of drain holes, and the water in the tube from the slit is drained by gravity from the drain hole located on the lower side in the installation position on the vehicle body.

[0005]

[Action]

 Since the corrugated tube for a wire harness of the present invention having the above-described configuration has the above-mentioned drainage hole group, even if water in the tube from the slit mouth occurs in any of the drainage hole groups in the mounting posture on the vehicle body. Since some of them are always present below the installation posture, the water in the tube is effectively drained. Further, because of its drainage effect, the slits may be arranged in any direction on the vehicle body, and the conventional slit position regulation and waterproof measures such as tape winding become unnecessary.

[0006]

【Example】

 Hereinafter, a detailed description will be given based on examples. First, referring to FIG. 1 showing a first embodiment of the present invention, ridge ring portions 1 having a U-shaped cross section which are opened in a tube of a circular tubular body are continuously arranged at a fine pitch in the axial direction, The ridges 2 and valleys 3 of the ridge ring portion 1 are alternately continuous and have a slit opening 4 which is cut through in the longitudinal direction of the tube. From this slit opening 4, the wire bundle of the wire harness is provided. In the corrugated tube for a wire harness that accommodates and stores 5, the ridge annulus 1 is located at the center of the crest 2 in the width direction and is required in the circumferential direction of the ridge annulus 1. The drainage holes 6 are arranged in a scattered manner with a pitch, and in this embodiment, the drainage holes 6 are arranged in a group of 15 drainage holes 6A including the drainage holes 6A positioned symmetrically with the slit port 4. Has become.

This embodiment of FIG. 1 has a structure in which, when it is mounted on a vehicle body and disposed, as shown in FIG. 1 (C), the slit opening 4 is set at any position including the upper side of the tube. Since some of the groups of holes 6 are present below the corrugated tube in that position, the water in the tube from the slit port 4 is effectively drained outside the tube. The group of drainage holes 6 exists in the center of the mountain portion 2 of the ridge ring portion 1, the wire bundle 5 housed in the tube is supported by the inner wall 3A of the valley portion 3, and the space 7 exists below. Therefore, even if the water inside the corrugated tube is not immediately drained from the drain hole 6 but temporarily collects, the accumulated water will be collected in the space 7 of the ridge ring portion 1, so the influence of the water bundle 5 on the water will be affected. However, the waterproof effect of the electric wire bundle 5 becomes more effective.

Next, an arrangement mode of the drain holes 6 according to another embodiment of the present invention will be described with reference to FIG. That is, in the corrugated tube having the drainage holes 6, the one of FIG. 2A has the drainage holes 6 at both corners of the valley portion 3 of the ridge ring portion 1, and the one of FIG. The holes 6 are formed at both corners of the mountain portion 2 of the ridge ring portion 1, and in the case of FIG. 2C, the drainage hole 6 is formed at the center of the valley portion 3 of the ridge ring portion 1, respectively. Many are arranged with a fine pitch. The wire harness corrugated tube of the embodiment shown in FIGS. 1 and 2 is mounted on the vehicle body as it is after accommodating the wire bundle 5 from the slit opening 4, and the slitting is performed by prioritizing the workability of disposing on the vehicle body. The mouth 4 is arranged in any direction.

[0009]

[Effect of device]

 As described above, the corrugated tube for wire harnesses of the present invention effectively protects the corrugated tube from the trouble of the stored electric wire bundle due to the fact that the water inside the tube is effectively drained. In addition to good stability, the conventional complicated waterproofing process is not required, and the regulation of the slit mouth setting at the time of installation is also unnecessary, so the work of storing the wire bundle in the corrugated tube is simplified and streamlined. In addition to satisfying the high productivity of wire harness mass production, there are various effects that reduce the cost of corrugated tubes and improve the workability of arranging them on the vehicle body.

[Brief description of drawings]

FIG. 1 shows a corrugated tube for a wire harness according to a first embodiment of the present invention, in which (A) is a perspective view thereof, (B) is an enlarged cross-sectional view of an essential part thereof, and (C) is shown. ) Is a cross-sectional view of its usage

FIG. 2 is a perspective view of a corrugated tube for a wire harness according to another embodiment of the present invention, in which (A), (B) and (C) are shown.

[Explanation of symbols]

 1 Ridge ring part 2 Mountain part 3 Valley part 4 Slit mouth 5 Wire bundle 6 Drain hole 7 Space

Claims (1)

[Scope of utility model registration request] 1. A tube body in which a ridge ring portion having a U-shaped cross section that opens into a tube is continuously provided on the outer periphery in the tube longitudinal direction at a required pitch, and a wire group is formed from a slit opening cut in the tube longitudinal direction. In a corrugated tube for a wire harness for accommodating a wire harness, a wire harness having a structure in which a tube wall of a mountain portion or a valley portion of the ridge ring portion is provided with drainage hole groups arranged with a required pitch in a circumferential direction. Corrugated tube for.