JPH01138924A - Cable duct - Google Patents

Abstract

PURPOSE:To lay a cable duct easily in a sewerage and drain conduit by bending inward one side of the opening of a telecommunication cable duct C-shaped in cross section and by providing a hole corresponding to an upper bolt-fitting hole. CONSTITUTION:One side of the opening of a cable duct 7 C-shaped in cross section and opened in the axial direction is bent to form a bending part 9. Holes 10 for passing an anchor bolt 4 are provided at both ends of said duct 7 to engage said anchor bolt 4 driven in the ceiling or upper part of a sewerage and drain conduit. In the position corresponding to said holes 10, holes 11 are provided to facilitate the insertion of a nut and nut-driver 8. In this manner, the laying work of a cable 2 in the sewage and drain conduit 1, where sewage water 6 flows, can be performed easily.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a cable duct for communication cables laid on the wall of a sewer pipe.

(Prior Art) In recent years, the field of communication has made remarkable progress, and as a result, new communication cables are often laid or expanded between distant areas. Among these, a structure in which communication cables are laid using the walls of sewer pipes is an advantageous method in terms of construction time and cost. The conventional general structure was to hold the communication cable on the ceiling side of the sewer pipe using a cable support, insert it into an anchor bolt, and tighten it with a nut. Due to the structure, two or more anchor bolts are required for each cable support location, and one communication cable tends to sag due to its own weight, so in order to reduce the spacing between cable holders, a large number of cable holders were required.

(Problem to be Solved by the Invention) Even if the distance between cable holders used to lay communication cables is narrowed, the cables will loosen due to their own weight and the gap between them and the wall will become larger, causing sewage to fill the sewage pipes. When the cable flows, foreign objects may get caught and obstruct the flow, or cause excessive force to be applied to the cable and cause damage.

In addition, when installing an additional cable, the previous cable may become an obstacle, and when installing a new cable or replacing it, there are many installation points.
The disadvantage was that it required a lot of time to do the work.

The purpose of the present invention is to install a cable duct that eliminates cable slack and foreign objects from getting caught, makes it easy to add or replace communication cables, and prevents installed communication cables from falling out.

[Structure of the invention]

(Means for Solving the Problems) The cable duct of the present invention is continuously fixed inside the sewer pipe.

(Function) When a communication cable is inserted through the opening of a fixed cable duct, it is stably installed at the bottom of the duct, but since there is a ridge on the inside of the opening, it is prevented from jumping out.

(Example) Hereinafter, an example of the cable duct according to the present invention will be described with reference to FIGS. 1 and 2.

Figure 1 shows a cross-section of cables laid in a sewer pipe;
The figure is an external view of the cable duct.

In FIG. 1, an anchor bolt 4 and a driving cable duct 7 are assembled into a sewer pipe passageway 1 and fixed by tightening with a nut 5. The communication cable 2 is inserted through the cable duct opening.

Figure 2 shows details of the cable duct 7, with a stopper hole 10 at the top for passing the anchor bolt 4 through, and a box spanner hole 11 for inserting a box spanner 8 for assembly tightening on the opposite side.
There is. One end of the opening has a bend and is folded inward.

In the case of new installations, the cable duct is more rigid than the communication cable, so the anchor bolts can be spaced widely apart. Furthermore, since only one anchor bolt is required, the total number of anchor bolts to be driven and the mounting interval can be wide, so the assembly work time can be greatly reduced.

During assembly, the hole used as the box spanner hole 11 can be used as a drainage hole when the sewage water temporarily becomes full. It can also be used for pushing out cables when removing them.

The bent portion 9 of the opening has the effect of preventing the cable from jumping out even if it is not fastened. Moreover, the rigidity supporting the weight of the cable can be increased.

The surface that comes into contact with the sewer pipe is rounded, so it can be used even if the pipe diameter of the pipe is different.

Anchor bolts are not limited to the ceiling of sewer pipes,
As shown in Figure 1, it can be towed at any position, making expansion easy.

The cable duct shape has no snagging points, so there is no obstruction of flow due to foreign matter accumulation when the water is full.

The number of cables to be tightened or stopped can be minimized, making it easy to increase or update the number of cables.

Communication cables are often constructed while existing sewage is being formed, and by reducing the amount of work required under adverse conditions, this improves safety and has economic benefits.

〔Effect of the invention〕

According to the present invention, even if a communication cable is easily loosened and damaged, it is sufficient to simply place it in a cable duct, so that it can be maintained as a long-life cable without damage.

[Brief explanation of the drawing]

Fig. 1 shows an embodiment of the present invention at sewer pipe (7) cut 1.
19. FIG. 2 is an exploded perspective view of the cable duct. 1...Sewage pipe cleaning 2...Communication cable 3...Cable support 4...Anchor bolt 6...Sewage 7...Cable duct 9...Bending department agent Patent attorney Noriyuki Chika Yamashita - Figure 1 Figure 2

Claims (1)

[Claims] In a cable duct for communication cables laid inside a sewer pipe, a part of the pipe-shaped cross section has an opening that is continuous in the axial direction, one side of this opening is bent inward, and the upper mounting bolt hole is connected to the cable duct. A cable duct comprising a hole provided on the opposite side.