JPH0727229U - Corrugated tube for wire harness - Google Patents

Abstract

(57) [Summary] [Purpose] To make it possible to easily pass a wire harness through a corrugated tube without using a special jig. [Structure] A slit-shaped slit 2 is cut along the entire length of the main body of the corrugated tube C. Further, the ends of the slits 2 are widened toward the end to form guide edges 3 in contact with the side surface of the wire harness W at the opening edges. As a result, the wire harness W can be partly taken into the corrugated tube C from the initial stage of introduction, and when the wire harness W is pushed in as it is, the slit 2 can be automatically expanded.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to a corrugated tube for a wire harness.

[0002]

[Prior art]

 Conventionally, wire harnesses used for wiring of automobiles and the like have been partially protected by being passed through a bellows-shaped tube called a corrugated tube. Since the corrugated tube is wound around the middle of the wire harness, slits are provided as split grooves along the length direction, and it is necessary to open it forcibly to take the wire harness inside. I was able to do it. However, since the corrugated tube itself has the required rigidity, it requires a considerable amount of force to expand the slit, and it is not easy to accommodate the wire harness while expanding it.

Therefore, various dedicated jigs for expanding slits have been developed, and various devices have been devised so that such a threading operation can be performed easily. An example thereof is that disclosed in Japanese Utility Model Publication No. 3-113915.

[0004]

[Problems to be solved by the device]

 However, although such a jig can be smoothly moved after being set in the corrugated tube, the end of the slit must be forcibly opened when setting it in the jig as a preparatory work. In addition, the end of the slit is simply notched, and no special measures have been taken to guide the setting operation, which makes work difficult. Furthermore, since a dedicated jig is used, it may not always be possible to expect improvement in work efficiency for workers who are not familiar with it. In addition, there is room for cost reduction due to the use of jigs.

The present invention has been developed and devised in view of these problems in the past, and the purpose thereof is to facilitate the work of threading the corrugated tube without using a jig. It is to provide a corrugated tube that can achieve a reduction in working cost.

[0006]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the structure of the present invention is a corrugate in which a slit is formed over the entire length of the main body with both ends open, and the wire harness can be inserted inside by forcibly expanding the slit. In the tube, a guide edge that widens toward the opening surface of the main body is formed at the end of the slit.

[0007]

[Action]

 According to the above configuration, when the wire harness is covered with the corrugated tube, first, the guide edge portion that is widened is pressed against the wire harness while gripping the main body. With this pressing operation, the guide edge portion is guided to the expanding operation, and the initial introduction operation of the wire harness is smoothly performed. Therefore, if the corrugated tube is directly pushed and fitted along the length direction of the wire harness, the wire harness can be continuously accommodated.

[0008]

[Effect of device]

 The effects of the present invention are as follows. Since the corrugated tube can be passed through without using a jig, it does not require skill and can be performed efficiently. In addition, the cost can be reduced because no jig is used.

[0009]

【Example】

 Embodiments embodying the present invention will be described below in detail with reference to the drawings. FIG. 1 shows the entire corrugated tube C, and the tube body 1 is formed of a resin material as in the conventional case. Further, the main body 1 has a bellows tubular shape with both ends open, and is provided with good flexibility. Further, the inner diameter of the main body 1 is set so that the wire harness W accommodated therein can be loosely inserted, and the tube length is set so as to cover the length range in which the protection of the wire harness W is required. .

Furthermore, a slit 2 as a split groove is cut along the entire length of the main body 1, and the wire harness W is taken into the main body 1 by forcibly expanding the slit 2. You can Further, the main body 1 is cut off at both ends of the slit 2 so as to form a wedge shape, and more specifically, the main body 1 expands from the cut line formed by the slit 2 in both left and right directions at substantially equal opening angles. Has been cut off. This cut-off edge will function as a guide edge 3 for expanding and deforming the slit 2 thereafter (this point will be described next).

In order to pass the wire harness W through the corrugated tube C of the present example configured as described above, first, the cut-off portion on the one end side of the main body 1 is made to face the wire harness W and applied. Then, as shown in FIG. 3 (A), the top of the wire harness W 1 is partially taken into the main body 1. That is, since both guide edges 3 are in contact with the side surface of the main body 1, if the main body 1 is pushed toward the wire harness W side as it is, the slit 2 will be automatically expanded, and as shown in FIG. As shown, the entire circumference of the wire harness W 1 is housed in the main body 1. Therefore, thereafter, if the press-fitting work is continued along the length direction of the main body 1, the covering work of the entire corrugated tube C is completed.

As described above, according to the corrugated tube C of this example, the operation of expanding the slit 2 is smooth, and thus the workability is excellent. Moreover, since the through-work can be performed without using a dedicated jig, the cost can be expected to be reduced by eliminating the jig.

By the way, although the guide edge 3 in the above-mentioned example is shown in the case where the opening side is formed at an acute angle, it may be chamfered 4 in an arc shape as shown in FIG. With this configuration, the wire harness W is not caught and the introduction work can be performed more smoothly.

Further, the guide edge 3 is not limited to one that is widened from the slit 2 in both directions, and may be one that is widened only on one side as shown in FIG.

The present invention can be modified in various ways. For example, the guide edges 3 need not be provided at both ends of the main body 1, but can be provided only on one side. It should be included in the gist of the invention.

[Brief description of drawings]

FIG. 1 is a perspective view of a corrugated tube.

FIG. 2 is a side view showing a threading operation through a wire harness.

FIG. 3 is a side view showing a threading operation through a wire harness.

FIG. 4 is an enlarged view of a main part showing a modified example of a slit.

FIG. 5 is an enlarged view of an essential part showing a further modification of the slit.

[Explanation of symbols]

 1 ... Main body 2 ... Slit 3 ... Guide edge C ... Corrugated tube W ... Wire harness

Claims (1)

[Scope of utility model registration request] 1. A corrugated tube in which a slit is formed over the entire length of a main body with both ends open, and a wire harness can be inserted therein by forcibly expanding the slit. A corrugated tube for a wire harness, characterized in that a guide edge is formed which expands toward an opening surface of the main body.