JP2000350330A - Wiring duct - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wiring duct capable of reducing manufacturing cost, high efficiency without causing repeated wastefulness, shortening the time for wiring by discharging the, bits and chips of an electric wire drawing hole easily from a duct body to the outside even if a cover body is integrally formed on the duct body. SOLUTION: This duct body 1 is formed by the extrusion of a synthetic resin so that a slit hole 3 formed among a cover body 2 formed by folding the upper end parts of both sidewalls 1a of a duct body 1 having a U-shaped strip body inward in a longitudinal direction is enlarged with the bottom plate 1b of the duct body 1 bent inward, an electric wire drawing hole 4 is formed on both sidewalls 1a of the duct body 1 by punching. A scrap is discharged from the slit hole 3, and the bottom plate 1b of the duct body 1 is flattened, thereby narrowing the slit hole 3 and roughly closing the duct body 1 by the cover body 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wiring duct for accommodating wiring wires such as a switchboard and a control panel.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 5, for example, this type of wiring duct has a duct main body 11 for collectively wiring electric wires for wiring such as a switchboard and a control panel, and an upper portion of the duct main body 11 is closed. The lid 12 is provided for the purpose. The duct main body 11 is formed as a long body having a substantially U-shaped cross section by extrusion molding of a synthetic resin, and a plurality of electric wires are drawn out at equal intervals in the longitudinal direction of both side walls 11b integrally raised from both sides of the bottom plate 11a. The holes 13 are formed. The lid 12 is formed as a substantially flat elongated body by extrusion molding of a synthetic resin.
The fitting portion 14 is fitted into a fitting groove 15 formed at the upper end of both side walls 11b of the duct main body 11, so that the upper part of the duct main body 11 can be closed.

In this type of wiring duct, an upper portion of the duct body 11 is closed by a lid 12 after wires are wired to the duct body 11, but the upper portion of the duct body 11 is integrally formed. If it is closed from the beginning by the closed lid 12, it becomes very difficult to wire electric wires to the duct main body 11, and the wire outlet holes 13 are formed in both side walls 11 b of the duct main body 11.
When the wire drawing hole 13 is punched in the case of providing the
This is because the waste is no longer discharged from the duct 1 and the scraps accumulate in the duct body 11.

Therefore, in the conventional wiring duct configured as described above, in a state where the upper part of the duct body 11 is not closed by the lid body 12, the wire drawing hole 13 is punched, and the wire body is inserted into the duct body 11. And a part of these electric wires is drawn out of the duct main body 11 from the electric wire lead-out hole 13 as necessary, and the upper part of the duct main body 11 is closed by the lid 12.

[0005]

However, in the conventional wiring duct, as described above, the duct body 11
Since the lid 12 is provided separately from the main body, the lid 12 must be manufactured in a process different from that of the duct body 11 by extruding the lid 12 or the like. Had.

Further, in the conventional wiring duct, after the operation of wiring the wires to the duct body 11 is completed, the cover 12 is fitted into the duct body 11 to perform the work of closing the duct body 11. There is a problem that the work becomes inefficient due to the work being performed twice, and it takes much time for these works.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problems, and it is possible to easily discharge the scum of an electric wire lead-out hole from the duct body to the outside even if the lid body is provided integrally with the duct body. Another object of the present invention is to provide a wiring duct in which the manufacturing cost can be reduced and the work can be performed efficiently without the need for double work, and the wiring work does not take much time.

[0008]

Therefore, a wiring duct according to the present invention has a cover formed by bending the upper ends of both side walls 1a of a duct body 1 formed as a long body having a substantially U-shaped cross section inward in the longitudinal direction. Slit hole 3 formed between bodies 2
The duct body 1 is formed by extruding a synthetic resin into a greatly expanded state by making the bottom plate 1b of the duct body 1 curved inward, and is punched into both side walls 1a of the duct body 1. After forming the wire drawing hole 4 and discharging the scrap from the slit hole 3, the bottom plate 1 b of the duct body 1 is flattened to narrow the slit hole 3 so that the duct body 1 is covered. It is configured to be substantially closed by the body 2.

In the wiring duct according to the present invention, a separation slit 5 may be formed from the wire outlet hole 4 to the edge of the cover body 2 on the slit hole 3 side.

Further, the wiring duct of the present invention may be formed such that an engaging portion 2b which is bent into a flange shape is formed at the edge of the cover body 2 on the side of the slit hole 3.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a wiring duct according to an embodiment of the present invention.

FIGS. 1 and 2 show an embodiment of the wiring duct of the present invention, and FIGS. 3 and 4 show another embodiment of the wiring duct of the present invention.

In any of the embodiments, the wiring duct of the present invention is a cover body formed by bending the upper ends of both side walls 1a of a duct body 1 formed as a long body having a substantially U-shaped cross section inward in the longitudinal direction. Slit hole 3 formed between 2
The duct body 1 was formed by extruding a synthetic resin into a state in which the bottom plate 1b of the duct body 1 was curved inward so as to be greatly expanded as shown by the solid line in FIGS. It is assumed.

The side walls 1a are integrally raised from both sides of the bottom plate 1b of the duct main body 1.
A plurality of wire drawing holes 4 are formed at regular intervals in the longitudinal direction by punching. Further, as in the embodiment shown in FIGS. 1 and 2, if the separation slits 5 are formed from the electric wire drawing hole 4 to the edge on the slit hole 3 side of the cover body 2, the separation slits 5 The side wall 1a is partially cut off with a cutting tool such as a nipper to widen the wire outlet hole 4 so that the wire to be wired to the duct body 1 can be easily drawn out.

According to the present invention, the scum of the wire drawing hole 4 formed by the punching process is discharged from the slit hole 3. In this case,
Although the slit hole 3 needs to be directed downward, the duct main body 1 is repeatedly turned as shown by a solid line in FIGS. With the bottom plate 1b facing upward and the slit holes 3 facing downward, or after the duct body 1 is formed by extrusion molding of a synthetic resin, the duct body 1 is repeatedly turned, and the bottom plate 1b of the duct body 1 is placed upward. The slit hole 3 can be directed downward.

Thereafter, according to the present invention, the bottom plate 1b of the duct main body 1 is flattened to narrow the slit hole 3 as shown by the imaginary line in FIGS.
Are substantially closed by the cover body 2. In order to flatten the bottom plate 1b of the duct main body 1, it is convenient and preferable to use hot air or a heating roll.

At the edge of the cover body 2 on the slit hole 3 side,
1 and 2, a thick portion 2a is formed to reinforce this portion. In FIGS. 3 and 4, the engaging portion 2b bent into a flange shape is used. Is formed, and after the electric wires are wired to the duct body 1, the engaging portions 2 b are engaged with each other to reinforce this portion, and the duct body 1 is completely closed by the cover body 2. I have to.

In the wiring duct of the present invention configured as described above, as shown in FIGS. 1 and 2, an electric wire can be inserted from the slit hole 3 and wired to the duct main body 1.
Even if the wire to be wired is thicker than the slit hole 3, it can be wired to the duct body 1 by forcibly pressing. And the electric wire wired to the duct main body 1 can be drawn out of the duct main body 1 from the electric wire drawing hole 4 as needed. Further, when it is difficult to pull out the electric wire from the electric wire outlet hole 4, if the electric wire outlet hole 4 is widened by partially cutting off the side wall 1a between the separation slits 5, the electric wire wired to the duct main body 1 can be easily drawn out. In addition, in the case of this embodiment, the slit hole 1 cannot be closed,
Although the duct main body 1 is not completely closed by the cover body 2, the electric wires wired to the duct main body 1 do not fall out of the slit holes 3 and there is no problem in practicality.

Further, the wiring duct of the present invention is shown in FIG.
4 can also be inserted into the duct body 1 by inserting an electric wire through the slit hole 3. Even if the wire to be wired is thicker than the slit hole 3, it can be wired to the duct body 1 by forcibly pressing. And
The electric wire wired to the duct main body 1 can be drawn out of the duct main body 1 from the wire drawing hole 4 as needed.
Note that, in the case of this embodiment, the slit hole 1 is
Is closed by engaging the engaging portions 2b of the end edges of each other, the duct main body 1 is completely closed by the cover body 2, and the electric wires wired to the duct main body 1 do not fall off.

[0020]

Since the wiring duct of the present invention is constructed as described above, even if the lid is integrally provided on the duct main body, the scraps of the electric wire draw-out holes can be easily discharged from the duct main body to the outside. Since the discharge can be performed, the manufacturing cost is reduced, and the work can be efficiently performed without the need for the work twice, and the wiring work does not take much time.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a wiring duct of the present invention.

FIG. 2 is an explanatory view showing a shape of one end face in a manufacturing process of the wiring duct of the present invention shown in FIG.

FIG. 3 is a perspective view showing another embodiment of the wiring duct of the present invention.

FIG. 4 is an explanatory view showing a shape of one end face in a manufacturing process of the wiring duct of the present invention shown in FIG. 3;

FIG. 5 is a perspective view partially showing a conventional wiring duct.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Duct main body 1a Side wall 1b Bottom plate 2 Cover body 2b Engagement part 3 Slit hole 4 Wire lead-out hole 5 Separation slit

Claims (3)

[Claims] 1. A cover body (2) formed by bending upper ends of both side walls (1a) of a duct body (1) formed as an elongated body having a substantially U-shaped cross section inward in the longitudinal direction. The slit hole (3) into the bottom plate (1b) of the duct body (1).
The duct body (1) is formed by extruding a synthetic resin in such a state that the duct body is greatly expanded by being curved inward, and the electric wire is formed by punching both side walls (1a) of the duct body (1). After forming the drawing hole (4) and discharging the scrap from the slit hole (3), the bottom plate (1b) of the duct body (1) is flattened to narrow the slit hole (3). A wiring duct wherein the duct body (1) is substantially closed by the cover body (2). 2. The wiring according to claim 1, wherein a separation slit (5) is formed from the wire drawing hole (4) toward an edge of the cover body (2) on the side of the slit hole (3). duct. 3. A slit (3) in said cover (2).
An engaging portion (2b) bent into a flange shape on the side edge
The wiring duct according to claim 1, wherein the wiring duct is formed.