JPH09117035A - Round protective tube for wire harness - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure a fixing part to the outer circumference of a wire harness in the inserting attitude while wrapping thereon by forming the fixing part in a U-shape and taping the fixing part of a flexible tube directly. SOLUTION: The wire bundle of a wire harness 4 is inserted into the hollow part of a round tube made of flexible resin having a required length. Upper half of the tube is cut off to obtain a U-shaped fixing part 2. When a tape 3 is applied, the U-shaped fixing part 2 is constricted easily and wrapped around the wire harness 4. Consequently, a protective tube 1 can be applied easily and accurately to a predetermined position of the wire harness and secured in place by simply taping the fixing part 2 directly.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire harness which is used to protect a wire of a wire harness by inserting the wire harness into a hollow portion and winding and fixing the wire harness at a key portion of the wire harness. It is related to a circular protection tube.

[0002]

2. Description of the Related Art Round protective tube 1 for wire harness
(Hereinafter, simply referred to as protection tube 1) (see FIG. 3),
A flexible resin tube of a required length with both ends cut in the diameter direction is inserted into the hollow portion of the wire of the wire harness 4 and attached to the wire harness 4 at a desired position. Apply and tighten the wire harness 4
It is designed to be attached and fixed to.

The above-mentioned conventional protection tube 1 is easily attached to the intermediate portion of the wire harness 4 of the long wire bundle.
Since it has a tube shape having an inner diameter considerably larger than the outer diameter of the wire harness 4 and the mounting portion 2 also has a circular tube body, it becomes difficult to fix the wire harness 4 to the wire harness 4 as it is. Therefore, a large diameter portion 8 formed by winding tape is formed in advance at the attachment point of the wire harness 4 to which the attachment portion 2 should be set, and the large diameter portion 8 is attached to the attachment portion 2
A method of mounting and fixing the wire harness 4 in the wire harness 4 by re-tapping it on the mounting portion 2 is adopted.

[0004]

The above-mentioned set for mounting the conventional protection tube 1 on the wire harness 4 is such that the primary tape winding wound under the wire harness 4 for the purpose of increasing the diameter and the mounting portion 2 are wound. On the secondary tape winding to press down,
This is a continuous operation using the common tape roll 6, and when winding the secondary tape, the tape 7 forming the large diameter portion 8 and extending is pressed in the direction of arrow B in the figure at the end of the protective tube 1. Since it is necessary to cover the attachment portion 2 with the large-diameter portion 8, it becomes a difficult and inefficient work.

The above-described work of mounting and fixing the wire harness 4 on the wire harness 4 is performed on the mass-production molding line of the wire harness 4 having a fast line tact, which is one factor that delays the line tact due to its difficult workability. There is a quality defect that sometimes occurs when the protection tube 1 does not have a fixed set.

The present invention provides a protection tube that overcomes the above-mentioned drawbacks of the prior art.

[0007]

SUMMARY OF THE INVENTION The protective tube of the present invention for solving the above technical problem is "a flexible tube in which a wire harness is inserted into a hollow portion, and an attaching portion at an end of the tube is taped and fixed to the wire harness. A round protective tube for a body wire harness having a U-shaped groove mounting portion structure having a structure in which the mounting portion is formed in a U-shaped groove shape,

Similarly, the round protective tube for a wire harness is characterized in that the mounting portion structure with a slit is "a structure in which at least one tube wall dividing slit extending from the tube end in the tube longitudinal direction is provided in the mounting portion". . The U-shaped groove mounting portion includes a semi-circular or substantially semi-circular tube body and a dish-shaped portion formed by part of the arc of the tube body.

[0009]

In the protective tube of the present invention described above, the mounting portion at the end of the tube for tape winding and fixing to the wire harness has a U-shaped groove or a slit for dividing the wall of the tube, and the protective tube itself is a flexible tube body. Therefore, the mounting portion can be attached and fixed to the outer circumference of the wire harness in the inserted posture by directly winding the tape around the mounting portion and tightening the tape. Therefore, the conventional measures for increasing the diameter of the wire harness are unnecessary.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The protection tube of the present invention is implemented as follows.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, referring to FIG. 1 showing an embodiment of a U-shaped groove mounting portion structure, a wire tube of a wire harness 4 is made of a round tube made of a flexible resin having a required length. Through the cable, and the tape winding 3 is applied to the mounting portion 2 at the end of the tube, and the wire harness 4 is fixedly mounted on the wire harness 4.
In the round protective tube 1 for a wire harness that protects the wire harness, the mounting portion 2 of this embodiment has a U-shaped groove shape of a semicircular tube in which the upper half portion of the tube body is cut off and only the lower half portion is left. Then, the tape winding 3 is applied from above the U-shaped groove type mounting portion 2 to wind and fix the inserted wire harness 4 and the mounting portion 2.

When the protective tube 1 of this embodiment shown in FIG. 1 is used, since the mounting portion 2 has a semicircular tube shape, it is extremely easily reduced in diameter and deformed by the external tightening force of the tape to adhere to the outer periphery of the wire harness 4. Wire harness 4
It is not necessary to wind the tape around the outer periphery of the protective tape to increase the diameter.
Can be accurately and easily attached and fixed to a predetermined position of the wire harness 4.

Next, an embodiment of a mounting portion structure with a slit will be described with reference to FIG. That is, in a round protective tube 1 for a wire harness similar to that of the embodiment of FIG. 1, the attachment portion 2 of this embodiment is provided with a single slit of the tube wall 5 extending from the end of the tube in the longitudinal direction of the tube. The protective tube 1 is attached and fixed to a predetermined position of the wire harness 4 in the insertion posture by winding and fastening the mounting portion 2 with the tube wall dividing slit 5 with a tape.

The mounting portion 2 of the protective tube 1 of this FIG. 2 embodiment is extremely easily deformed by the external force directed toward the center of the tube body due to the presence of the tube wall dividing slit 5, so that the mounting portion 2 of FIG. Has the same effect as
The measure for increasing the diameter of the wire harness 4 becomes unnecessary.

The mounting portion 2 of the protective tube 1 of the present invention is as follows.
Is not limited to the above embodiment, the U-shaped groove mounting portion 2 or the tube wall dividing slits 5 may be provided at both ends of the protective tube 1, or the tube wall dividing slits 5 may be doubled. Then, in the case of the attachment portion 2 with the slit, the tape formed by forming the large diameter portion 8 and drawn out is passed through the tube wall dividing slit 5 to cover the attachment portion 2 with the large diameter portion 8. After that, the tape winding 3 may be applied to the mounting portion 2 in some cases.

[0016]

As described above, the round protective tube for a wire harness according to the present invention is very easily and accurately mounted and fixed on the wire harness, and the complicated measures for increasing the diameter of the wire harness are unnecessary. As a result, the workability of attaching to the wire harness is improved, the productivity of the wire harness mass production molding line is prevented from being delayed, and the productivity is improved. It is possible to prevent defective products due to improper fixing. There are the above effects.

[Brief description of the drawings]

FIG. 1 is a perspective view showing the structure and usage of a round protective tube for a wire harness according to an embodiment of the present invention.

FIG. 2 is a perspective view showing the structure and usage of a round protective tube for a wire harness according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram of a conventional round-shaped protective tube for a wire harness.

[Explanation of symbols]

 1 Circular protection tube for wire harness 2 Mounting part 3 Tape winding 4 Wire harness 5 Tube partitioning slit

Claims (2)

[Claims] 1. A round protective tube for a wire harness having a flexible tube body in which a wire harness is inserted into a hollow portion and an attachment portion at the end of the tube is fixed to a wire harness with a tape, and the attachment portion is U-shaped. Round protective tube for wire harness, characterized by a groove-shaped structure. 2. A round protective tube for a wire harness having a flexible tube body in which a wire harness is inserted through a hollow portion and an attachment portion of the tube end is fixed to the wire harness by tape winding, and the attachment portion is attached to the tube end. A round protective tube for a wire harness, characterized by a structure with at least one tube wall dividing slit extending in the longitudinal direction from the tube.