JP2007166770A - Wiring pipe material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wiring pipe material that grounds a metal switch box 1 easily. <P>SOLUTION: This wiring pipe material A, the wall 1 of which is formed in a corrugated shape by making crest portions 2 and trough ones 3 continue alternately, protects cables including electric wires or optical fibers passed through the pipe. A passage 5, through which at least a grounding wire 4 consisting of bare wires or coated wires is passed, is formed integrally with the pipe wall 1 in a pipe line. Also, the passage 5 is formed so as to be opened to outside at the trough portions 3 and to expose a part of the circumferential surface of the grounding wire 4 from the openings. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pipe for wiring, and more particularly to a pipe for wiring that can easily ground a metal switch box.

Conventionally, wiring pipe materials for inserting and protecting cables such as electric wires and optical fibers are made of resin with a tube wall in the direction of the tube axis to form a corrugated wave shape, and can withstand external pressure. An improvement has been proposed (for example, Patent Document 1). This wiring tube material has a tube wall formed in an uneven wave shape, the top of the convex corrugated portion is a substantially flat surface, and the width of the convex corrugation is wider than the width of the bottom of the concave corrugated portion. When inserting into a large-diameter pipe, the flat surfaces of the convex waveform will always be in contact with each other, so that the concave and convex portions of the wiring pipe material will not mesh with each other and the insertion will not be hindered or the insertion will not be possible. It is a thing.
JP 11-41772 A

  The problem to be solved by the present invention is that when the above-mentioned wiring pipe material is connected to a metal switch box and this switch box is grounded, the wire passing through the wiring pipe material is one ground wire. Using a three-core electric wire consisting of two power lines, stripping the ground wire in the switch box and screwing the bare ground wire to the screw makes the work complicated. there were.

  This invention solves the said problem and makes it a subject to provide the piping material for wiring which can perform grounding of metal switch boxes easily.

  In order to solve the above-described problems, a wiring pipe according to the present invention is a wiring pipe that protects a cable such as an electric wire or an optical fiber in which a pipe wall is formed in a wave shape by alternately forming a crest and a trough. In addition, the pipe passage is formed integrally with the pipe wall so as to pass at least one ground wire made of a bare wire or a covered wire, and the passage is formed to open to the outside at the valley portion. In addition, a part of the peripheral surface of the ground wire is exposed from the opening.

  In addition, it is preferable to provide an inner wall on the inner side of the tube wall of the pipe for wiring, and to form the outer inner wall with a resin having slidability so that the cable can be easily passed.

  According to the first aspect of the present invention, since the ground wire is exposed at the valley portion of the wiring pipe material, the grounding conductor is brought into contact with the ground wire, and the ground conductor is connected to the switch box. There is no need to pass a cable provided with a grounding wire to the cable passing therethrough, and the switch box can be easily grounded.

  According to the second aspect of the present invention, the cable can be easily routed by forming the inner wall with the resin having slidability on the inner side of the wiring pipe.

  1A and 1B show a front view and a side view of a wiring tube A according to the present invention, and FIG. 2 shows a bottom view. This pipe A for wiring is used for passing a cable such as an electric wire or an optical fiber into the pipe and protecting the cable.

  In this pipe A for wiring, the pipe wall 1 is formed into a wave shape by alternately forming the crests 2 and the troughs 3 by extrusion molding, and a passage 5 through which a ground wire 4 is passed through a part of the pipe wall. As shown in FIG. 3A, the passage 5 is formed with a passage 5 in the direction of the tube axis on the outer wall side in the trough portion 3, and a ground wire 4 made of a bare wire passing through the passage 5. The outside of the passage 5 is opened so that a part of the channel 5 is exposed.

  On the other hand, as shown in FIG. 3 (b), in the mountain portion 2, a passage 5 is formed integrally with a support plate 6 bulging inward on the inner wall side. Is inserted.

  As shown in FIG. 4, the wiring tube having the above configuration is attached so that the ground wire 4 is positioned on the side surface when attached to the switch box B via the connector 10. Thereafter, the substantially U-shaped cutout portion 14 formed in the metal ground conductor 11 is fitted so as to come into contact with the ground wire 4 exposed at the valley portion 3 of the wiring tube A as shown in FIG. If the mounting piece 12 located inside the switch box B is fixed with the screw 13, the switch box B can be grounded, and it is necessary to separately connect a ground wire to the cable connected to the wiring pipe. In addition, grounding work can be performed without the need for a cable having a ground wire.

  6 (a) and 6 (b) show that the ground wire 4 'in which the conductor 4'a is covered with the coating 4'b is disposed in the passage 5, and the covering 4 of the portion with which the above-mentioned ground conductor 11 is engaged. If 'b is peeled off, the grounding conductor 11 can be brought into contact with the conductor 4'a, so that the ground wire made of the bare wire exposed from the opening of the passage for the wiring tube does not corrode depending on the installation environment. A pipe for wiring can be provided.

  Further, as shown in FIGS. 7A and 7B, the inner wall 7 may be formed of a resin having slidability inside the tube wall of the wiring tube material. As a result, it is possible to reduce the contact resistance between the tube wall and the cable when the cable is inserted, and it is possible to realize a wiring tube material that can facilitate the wiring operation.

(A) and (b) are a front view and a side view of a pipe for wiring according to the present invention. Bottom view of the above wiring tubing (A) and (b) are the XX 'line sectional drawing of the XX', YY 'part of FIG. Plan view explaining the state of grounding the switch box Sectional view explaining the relationship between wiring tubing and grounding conductor (A) and (b) are a front view and a side sectional view for explaining another example of the wiring pipe material. (A) (b) is the front view and side sectional drawing explaining another example of the said piping material for wiring

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Pipe wall 2 Mountain part 3 Valley part 4 Ground wire 5 Passage A Pipe material for wiring

Claims (2)

  A pipe material for wiring that protects a cable such as an electric wire or an optical fiber, which is formed in a wave shape by alternately forming a crest and a trough on a pipe wall, and the pipe has at least one of a bare wire or a covered wire. A passage through which the earth wire passes is formed integrally with the pipe wall, and the passage is formed to open to the outside at the valley portion, and a part of the peripheral surface of the ground wire is formed from the opening portion. A wiring tube characterized by being exposed.   The wiring pipe according to claim 1, wherein an inner wall is provided inside a pipe wall of the wiring pipe, and the inner wall is formed of a resin having slidability.

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