JPS5922754Y2 - electric wire support - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electric wire support for supporting electric wires installed in underground manholes, tunnels, etc.

Utility model registration No. 892013 for conventional devices of this kind
There is a steel pipe electric wire support (No. 44-16851), but when this electric wire support is erected between the bottom surface a and the ceiling surface in tunnel A as shown in Figure 3, the length when installed is Since this does not change, there is a risk that the bottom surface a and the ceiling surface may change during long-term use, or that the product may collapse if a large horizontal force is applied during an earthquake or the like.

The present invention was devised to improve these shortcomings, and provides a wire support that does not have the risk of falling even if the support surface of the support in the tunnel changes or if a horizontal force is applied to the support due to an earthquake. It is intended to do.

Embodiments of the present invention will be described below with reference to the drawings.

In the figure, 1 is a steel pipe of a predetermined length that becomes the main body of the support, and 2 is a scale marked on the surface of the pipe.

In the present invention, a base plate 3 having a diameter larger than the pipe diameter is fixed to the lower end of the pipe 1 by welding 4.

3a is a drain hole provided in the center of this base plate 3.

Further, a cylindrical body 5 having a female thread 5a on its inner circumference and a hollow 5b formed on its outer circumference is fitted onto the upper end of the tube 1, fixed by welding 6, and screwed into the female thread 5a. 7a is provided on the outer periphery of the lower half of J□w on the inside of the upper part of the inner tube 7.
A seat plate 8 that supports the screws and has a bolt insertion hole 8a in the center is inserted and fixed by welding 9, and a through hole 7b for rotational drive is formed in the tube wall between this seat plate 8 and the screw 7a. The inner upper surface 10a of the disk 10, which has a larger diameter than the inner tube 7, is recessed to provide a bolt insertion hole 10b in the center, and the upper surface 10C of the outer circumferential portion of the disk 10 is formed with anti-slip irregularities. A cylindrical skirt 11 for enclosing the inner tube 7 is protruded from the lower surface of the disk 10 to form a saucer 12, and a coil spring 13 is fitted onto the seat plate 8 of the inner tube 7. , place the saucer 12 on top of the coil spring 13, insert the bolt 14 through the bolt insertion holes 10b and 8a of the saucer 12 and the seat plate 8, and insert the nut 1 into the protruding threaded portion 14a.
5 are screwed together, and the screw a of this inner cylinder 7 is screwed into the female thread 5a of the cylinder body 5.

Note that 16 in FIG. 1 is a lowering limit display scale of the saucer 12 attached to the outer surface of the cylindrical body 7.

The electric wire support pole of the present invention configured as described above can be used, for example, in the third
As shown in the figure, a large number of cables are installed vertically between the bottom surface a and the ceiling in the tunnel A.

In other words, in order to install this electric wire support, hold the support vertically, which is slightly shorter than the length between the bottom surface a and the ceiling surface, and connect the support using the pipe 1 as the main material through oak 5b. In addition to preventing the main body from rotating, insert a rod (not shown) into the hole 7b.
is inserted through the inner tube 7, and by rotating the inner tube 7, the female thread a is pulled out from the female thread 5a.

In this way, as the inner tube 7 extends upward, the saucer 12 is gradually and firmly pressed against the ceiling surface via the coil spring 13.

That is, as the amount of deflection of the coil spring 13 increases, the saucer 12 is more strongly pressed against the ceiling surface, and the base plate 3 is also strongly pressed against the bottom surface a due to the reaction force.

In FIG. 3, reference numeral 17 indicates an arm extending from the tube 1, and reference numeral 18 indicates an electric wire (cable) placed on each arm 17.

As mentioned above, the wire support of the present invention can be fixed more firmly than the conventional one.

In addition, since the column of the present invention is tensioned with the coil spring 13 in a compressed state, it can sufficiently follow changes in the bottom surface a and the ceiling surface, for example, and can also prevent horizontal forces from acting due to earthquakes, etc. There is no danger of it falling over.

Furthermore, since the column of the present invention is provided with the nut 5b, there is an effect that the rotation of the column body can be reliably prevented.

Further, the saucer 12 of the present invention is connected to the inner tube 7 via the coil spring 13.
Even if the saucer 12 is slightly tilted, it can be sufficiently absorbed.

Furthermore, since the skirt 11 of the saucer 12 of the present invention encloses the upper end of the inner tube 7, it has the effect of preventing water droplets etc. from entering the interior of the support.

Furthermore, since the outer diameter of the base plate 3 and saucer 12 of the prop of the present invention is larger than that of the conventional one, the present invention has many effects, such as a greater ability to prevent the prop from falling.

[Brief explanation of drawings]

Figure 1a is a top view of the column of the present invention, and the figure is an elevational view thereof.
Figure C is a bottom view of the same, Figure 2 is a partially vertical elevational view of the column of the present invention, and Figure 3 is a view of the column of the present invention in use when erected in a tunnel. 1...Pipe forming the support main body, 2...
Scale, 3...Base plate, 5...
Cylindrical body, 7... Inner tube, 8... Seat plate, 10
... Disc, 11 ... Skirt, 12.
...Saucer, 13...Coil spring, 14.
...Bolt, 15...Natsuto.

Claims (1)

[Scope of utility model registration request] A base plate 3 with a diameter larger than the pipe diameter is fixed to the lower end of a pipe 1 of a predetermined length, and a female thread 5a is attached to the upper end of the pipe 1 on the inner circumference.
A cylindrical body 5 having a nut 5b formed on the outer periphery is fixed, and a spring 13 is supported inside the upper part of the inner tube 7, which has a groove 7a in the lower half to be screwed with the female thread 5a. A seat plate 8 having a bolt insertion hole 8a is provided in the tube wall between the seat plate 8 and the threaded portion 7a, and a hole 7b for rotational driving is provided in the pipe wall between the seat plate 8 and the threaded portion 7a.
An upper inner surface 10 of a disk 10 having a larger diameter than the inner tube 7 is provided.
A is recessed and a bolt insertion hole 10b is provided in the center thereof, and cylindrical scars 1 to 11 for enclosing the inner tube 7 are protruded from the lower surface of this disk 10 to form a receiving tray 12, and the inner tube 7 is
A coil spring 13 is fitted onto the seat plate 8 of the coil spring 13, and the saucer 12 is placed on top of the coil spring 13.
2 and the bolt insertion holes 10b and 8a of the seat plate 8, and insert the nut 1 into the protruding threaded portion 14a.
5 are screwed together, and the threaded portion 7a of the inner tube 7 is screwed into the female threaded portion 5a of the cylindrical body 5.