JPH0736424Y2 - Exterior tube for wire harness - Google Patents

Description

[Technical field] The present invention relates to an improvement of an outer tube that is put on an outer side of a wire harness in order to protect the wire harness.

[Prior art and its problems]

A wire harness in which a large number of electric wires are bundled is used for in-car wiring of automobiles.If this wire harness may come into contact with the vehicle body or equipment and be damaged, a plastic outer pipe is provided on the outer periphery of the wire harness. Covered. This outer tube is bellows-shaped and has one slit in the longitudinal direction, and the slit is opened to accommodate the wire harness (Actually, Sho 50-13166).

However, if the wire harness is covered with an outer tube, the outer diameter becomes large, and since the outer tube has a bellows-like structure and is hard to be crushed, it may not be possible to push-wire into a narrow place. For this reason, conventionally, a protector having a different shape is covered only at a portion where the outer tube does not enter, but this is extremely troublesome and has a drawback of high cost.

[Means for solving problems and their effects]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention provides an outer tube for a wire harness which is bellows-shaped and has a single slit for storing the wire harness in the longitudinal direction. 1. A fold groove is formed parallel to the split at a position opposed to the split, and one fold groove is formed on each side of the split between the fold groove and the split. Is.

When the folding groove is formed as described above, the tube wall is bent along each folding groove by applying a crushing force to the outer tube, so that the outer tube can be deformed into a flat shape.

〔Example〕

FIG. 1 shows an embodiment of the present invention. This wire harness exterior tube 1 has a bellows shape and has one split 2 in the longitudinal direction. The wire harness is stored in the pipe by opening the split 2.

In this embodiment, in such an exterior tube, three folding grooves 3a, 3b, 3c are formed in parallel with the split 2. One fold groove 3a is located at the opposite position of the split 2, and the other two fold grooves 3b are
3c are formed on both sides of the split 2 between the splits 2 and the facing positions thereof.

Since the exterior tube 1 has the above-mentioned configuration, when a strong crushing force is applied, the tube wall is bent along the fold grooves 3a, 3b, 3c, so that it should be deformed into a flat shape as shown in FIG. Is possible. Therefore, if the wire harness 4 is housed in such a deformed state, it can be pushed into the narrow wiring space 7 between the devices 5 and 6.

Although the folding groove is formed on the inner surface of the tube in the above embodiment, it may be formed on the outer surface of the tube. Further, when the flat groove is flattened, the folding groove is formed on the outer surface of the tube at a portion that is bent outwardly and is formed on the inner surface of the tube at a portion that is bent inwardly. Of course, it is also possible to form it on both inner and outer surfaces at the same location.

Further, in the above-mentioned embodiment, the folding groove is formed so as to be continuous in the longitudinal direction, but as shown in FIG. 3, the folding groove 3 has a shape in which a ridge is formed on the inner surface and the outer surface of the corrugated pipe wall. It is also possible to form intermittently. Further, as shown in FIG. 4, the folding groove 3 can also be formed by making a deep notch to the extent that there is a hole in the mountain portion on the inner surface (or the mountain portion on the outer surface) of the tube wall.

Further, the folding groove may be formed over the entire length of the outer tube, or may be formed only at a part of a necessary portion in the longitudinal direction.

[Effect of device]

As described above, the wire harness exterior tube of the present invention is formed with a single fold groove at a position facing the split of the pipe wall, and one ridge is provided between the fold groove and the split, one on each side of the split. Since the fold groove is formed, it can be easily flattened by crushing, which has an advantage that push wiring can be performed in a wiring space narrower than the outer diameter.

[Brief description of drawings]

FIG. 1 (a) is a vertical cross-sectional view of an outer tube for a wire harness according to an embodiment of the present invention, and (b) and (c) are cross-sectional views taken along the line Aa and BB of (a), respectively. Is a cross-sectional view showing a state of use of the outer tube, FIGS. 3 (a) and 3 (b) are longitudinal cross-sectional views and cross-sectional views of a main part showing another embodiment of the present invention, and FIG. 4 (a) and (B) is a longitudinal sectional view and a lateral sectional view of a main part showing still another embodiment of the present invention. 1 ~ Exterior tube for wire harness, split into 2/3, 3a / 3b
・ 3c ~ folding groove.

Claims (3)

[Scope of utility model registration request] 1. An outer tube for a wire harness, which is bellows-shaped and has a single split (2) for storing a wire harness in a longitudinal direction, wherein the split (2) of the pipe wall is provided.
Split into a position opposite to (1) and in parallel with (2)
a) is formed, and one fold groove (3b) (3b) is provided on each side of the split (2) in the middle of the fold groove (3a) and the split (2).
An outer tube for a wire harness, characterized in that c) is formed. 2. The exterior pipe according to claim 1 of the utility model registration, wherein the folding groove is formed over the entire length. 3. The exterior tube according to claim 1 of the utility model registration, wherein the folding groove is formed in a part of the longitudinal direction.