JP7323446B2 - Dust-proof cap for corrugated tube - Google Patents

Description

TECHNICAL FIELD The present invention relates to a corrugated tube dustproof cap that closes a gap between an end of an electric wire and an end of a corrugated tube.

As this type of corrugated tube dustproof cap, there is an exterior end cap described in Patent Document 1. This armored end cap comprises a split member that clamps the end of the corrugated tube that is armored to the two individual braided wires and the respective ends of the two individual braided wires to close the gap between the respective ends. I have it.

JP 2018-93656 A

The exterior end cap described in Patent Document 1 closes the gap between the ends of the two braided wires and the end of the corrugated tube. There is a demand for the development of a dustproof cap that can handle a plurality of electric wires such as a bundled braided electric wire and a single wire (electric wire).

The present invention has been made in view of the problems of the prior art. An object of the present invention is to close the gap between each end of a plurality of wires of a pair of wires and at least one wire covered by a braid of a collectively braided wire and the end of a corrugated tube. To provide a dustproof cap for a corrugated tube capable of preventing entry of dust or the like.

A dustproof cap for a corrugated tube according to an aspect of the present invention comprises: a collectively braided electric wire covering a plurality of electric wires with a braid; an end portion of the corrugated tube sheathing at least one electric wire; the collectively braided electric wire; a cap body that closes the gap between the end portions of the wires of the collectively braided wire, and the cap body includes a plurality of housing portions for housing the end portions of the pair of wires and the at least one wire of the collectively braided wire and a fitting portion that is fitted into the end of the corrugated tube.

It is preferable that the cap main body is divided into a main body and a cover, and the plurality of accommodating portions and the fitting portions are formed in halves at positions where the main body and the cover face each other.

It is preferable that the main body and the cover are integrally formed with a hinge for connecting the main body and the cover so that they can be opened and closed.

A braid covering the pair of wires is pressed against the outer peripheral surfaces of the pair of wires between a plurality of housing portions for housing the ends of the pair of wires of the collectively braided wire. It is preferable that a convex portion is formed to fill each gap between the wire and the at least one wire.

It is preferable that the cap main body is integrally formed on each end side of the collectively braided wire and the at least one wire by insert molding of synthetic resin.

According to the present invention, a gap between each end of a pair of electric wires and at least one electric wire covered with a braid of a collectively braided electric wire and a plurality of electric wires and an end of a corrugated tube is closed to remove dust and the like. It is possible to provide a dust-proof cap for corrugated tubes that can prevent the intrusion of dust.

BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows an example of the dustproof cap for corrugated tubes which concerns on 1st Embodiment of this invention. FIG. 4 is a side view of the dustproof cap; FIG. 2 is a cross-sectional view taken along line III-III in FIG. 1; It is a perspective view which shows the state before each electric wire is accommodated in the said dustproof cap. Fig. 3 is a perspective view showing a state before the dustproof cap housing the electric wires is attached to the corrugated tube. FIG. 10 is a perspective view showing an example of a dustproof cap for a corrugated tube according to a second embodiment of the present invention before being attached. It is a perspective view of the dustproof cap of the said 2nd Embodiment. FIG. 8 is a cross-sectional view taken along line VIII-VIII in FIG. 7;

Hereinafter, dustproof caps for corrugated tubes according to embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a perspective view showing an example of a corrugated tube dustproof cap according to a first embodiment of the present invention. FIG. 2 is a side view of the dustproof cap. FIG. 3 is a cross-sectional view taken along line III--III in FIG. FIG. 4 is a perspective view showing a state before each wire is accommodated in the dustproof cap. FIG. 5 is a perspective view showing a state before attaching the dustproof cap housing each electric wire to the corrugated tube.

As shown in FIG. 1, the corrugated tube dustproof cap 1 includes an end portion 40a of the corrugated tube 40 that is sheathed in a collectively braided electric wire 20 and a single wire (electrical wire) 30, and end portions 20a and 30a of the collectively braided electric wire 20 and the single wire 30. A cap body 10 made of synthetic resin is provided to close the gap between them. This bundled braided electric wire 20 has a pair of electric wires 21 and 21 covered with a braid 24 .

As shown in FIG. 4, the cap body 10 is divided into a body 11 and a cover 14 . The main body 11 and the cover 14 are integrally formed with a hinge 17 for connecting the main body 11 and the cover 14 so that the main body 11 and the cover 14 can be opened and closed. At the positions where the main body 11 and the cover 14 face each other when closed, there are three accommodating portions 12 and 15 each having a semicircular cross section and fitting portions 13 and 16 each having a semicylindrical shape. integrally formed.

As shown in FIG. 3, when the main body 11 and the cover 14 are closed, three housing spaces are formed between the three housing portions 12 of the main body 11 and the three housing portions 15 of the cover 14. . The ends 21a of the pair of electric wires 21, 21 of the bundled braided electric wire 20 and the end 30a of the single wire 30 are accommodated in these three accommodating spaces. Further, as shown in FIGS. 3 and 4, a pair of electric wires 21 of the bundled braided electric wire 20 are provided between the three adjacent storage portions 12 of the main body 11 and between the three adjacent storage portions 15 of the cover 14. , 21 and between the electric wire 21 and the single wire 30 without gaps. That is, as shown in FIG. 3, the braid 24 covering the periphery of the pair of electric wires 21, 21 of the collectively braided electric wire 20 with the projections 12a, 15a of the main body 11 and the cover 14 is positioned on the outer peripheral surface 23a side of each electric wire 21. The gaps between the electric wires 21 are filled by being pressed so as to be bitten into.

Furthermore, as shown in FIG. 4, the positions of the housing portions 12 of the main body 11 near the semi-cylindrical fitting portion 13 and the positions of the housing portions 15 of the cover 14 near the semi-cylindrical fitting portion 16 are: , diameter-reduced recesses 12b, 15b in which a pair of electric wires 21, 21 and a single wire 30 are accommodated in a three-layered manner are formed.

As shown in FIG. 5, each of the semi-cylindrical fitting portions 13 and 16 fitted into the end portion 40a of the corrugated tube 40 of the main body 11 and the cover 14 has an end portion 40a of the corrugated tube 40 on the outer side of the tip thereof. Semi-conical tapered surfaces 13a, 16a for press-fitting inside are formed. Further, semi-cylindrical fitting portions 13 and 16 of the main body 11 and the cover 14 are provided with semi-annular convex tube stop portions 13b and 16b at the proximal ends thereof to stop the end portion 40a of the corrugated tube 40. It is A pair of electric wires 21 and 21 and a single wire 30 are accommodated in a three-layered manner in each of the closed semi-cylindrical fitting portions 13 and 16 .

As shown in FIGS. 1 and 4, the bundled braided electric wire 20 includes a pair of electric wires 21, 21 and a braid (shielding member) 24 that covers the pair of electric wires 21, 21 and exerts a shielding function. I have it. Each electric wire 21 has a core wire 22 made of a conductive metal and an insulating coating 23 that covers the outer periphery of the core wire 22 .

Further, as shown in FIGS. 1 and 4 , the single wire 30 includes a core wire 31 made of a conductive metal and an insulating coating 32 covering the outer periphery of the core wire 31 . Further, the corrugated tube 40 has annular ridges 41 and troughs 42 alternately provided in the longitudinal direction to protect the bundled braided electric wire 20 and the single wire 30 inserted therein. That is, as shown in FIG. 5, after the cap body 10 is attached to each end 20a, 30a of the collectively braided electric wire 20 and the single wire 30, as shown in FIG. 13 and 16 are press-fitted into the end portion 40a of the corrugated tube 40. As shown in FIG. By press-fitting the cylindrical fitting portions 13 and 16 into the end portion 40a of the corrugated tube 40, dust and the like do not enter the corrugated tube 40. A single wire 30 is protected.

As shown in FIG. 3, when the main body 11 and the cover 14 are closed via the hinge 17, the locking protrusion (locking portion) 18 provided on the cover 14 engages the engaging recess (engaging portion) provided on the main body 11. 19, the closed state is locked.

As described above, according to the first embodiment, the gap between the ends 21a, 30a of the pair of electric wires 21, 21 of the collectively braided electric wire 20 and the three electric wires of the single wire 30 and the end 40a of the corrugated tube 40 is corrugated. By closing with the tube dustproof cap 1, the intrusion of dust or the like can be reliably prevented.

Further, when vibration occurs in a vehicle on which the corrugated tube 40 is mounted, the braid 24 of the bundled braided electric wire 20 inserted through the corrugated tube 40, the pair of electric wires 21, 21 and the single wire 30 are not damaged by the vibration. can be prevented by the corrugated tube dustproof cap 1.

FIG. 6 is a perspective view showing an example before installation of the corrugated tube dustproof cap according to the second embodiment of the present invention. FIG. 7 is a perspective view of the dustproof cap. FIG. 8 is a cross-sectional view taken along line VIII--VIII in FIG.

The corrugated tube dustproof cap 1A of the second embodiment is different from the first embodiment in that the cap body 10 is formed integrally with the ends 20a and 30a of the collectively braided electric wire 20 and the single wire 30 by insert molding of synthetic resin. different from that of form. Since the rest of the configuration is the same as that of the first embodiment, the same components are denoted by the same reference numerals, and detailed description thereof will be omitted.

In the corrugated tube dustproof cap 1A of the second embodiment, the cap main body 10 is formed integrally with the ends 20a and 30a of the collectively braided electric wire 20 and the single wire 30 by insert molding of synthetic resin. It has the same functions and effects as the form.

In particular, in the corrugated tube dustproof cap 1A, the cap body 10 is integrally formed by insert molding of synthetic resin, so that dust and the like can be easily and reliably prevented from entering through the gap between the pair of wires 21, 21 of the collectively braided wire 20. can be prevented. That is, when performing insert molding, if a gap is formed in the mesh of the braid 24 covering the pair of electric wires 21, 21, the molten resin is reliably filled between the outer peripheral surfaces 23a of the pair of electric wires 21, 21. This is because the gap between each electric wire 21 and the single wire 30 can be completely eliminated.

Although the present embodiment has been described above, the present embodiment is not limited to these, and various modifications are possible within the scope of the gist of the present embodiment.

That is, according to the first embodiment, the cover is provided with the engaging protrusion (engaging portion) and the main body is provided with the engaging recess (engaging portion), but the cover is provided with the engaging recess (engaging portion). Alternatively, a locking projection (locking portion) may be provided on the main body.

Reference Signs List 1, 1A dustproof cap for corrugated tube 10 cap main body 11 main body 12 three accommodating portions 12a convex portion 13 fitting portion 14 cover 15 three accommodating portions 15a convex portion 16 fitting portion 17 hinge 20 bundled braided electric wire 20a end portion 21, 21 pair of wires 21a end 23a outer peripheral surface 24 braid 30 single wire (at least one wire)
30a end 40 corrugated tube 40a end

Claims (5)

Closing gaps between ends of a braided electric wire covering a plurality of electric wires and a corrugated tube sheathing at least one electric wire and each end of the collectively braided electric wire and the at least one electric wire Equipped with a cap body,
The cap body is
a plurality of housing portions housing respective end sides of the pair of electric wires of the collectively braided electric wire and the at least one electric wire;
a fitting portion fitted into the end of the corrugated tube;
dust cap for corrugated tubes with The cap main body is divided into a main body and a cover,
2. The dustproof cap for a corrugated tube according to claim 1, wherein said housing portions and said fitting portions are formed in half at positions where said main body and said cover face each other. 3. The dustproof cap for a corrugated tube according to claim 2, wherein the main body and the cover are integrally formed with a hinge for connecting the main body and the cover so that they can be opened and closed. A braid covering the pair of wires is pressed against the outer peripheral surfaces of the pair of wires between a plurality of housing portions for housing the ends of the pair of wires of the collectively braided wire. 2. The corrugated tube dustproof cap according to claim 1, wherein a convex portion is formed to fill each gap between said at least one electric wire and said at least one electric wire. 2. The dustproof cap for a corrugated tube according to claim 1, wherein said cap body is integrally formed on each end side of said collectively braided electric wire and said at least one electric wire by insert molding of synthetic resin.

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