JPH0240160Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention relates to an overhead wire holder that also serves as a grout plug, and is designed to allow a segment backfill grout inlet plug used mainly in the shield construction method to also be used as an overhead wire holder. This invention relates to an overhead wire holder that also serves as a grout plug.

(Prior Art) In recent years, the shield method has been widely used for tunnel excavation work for subways, underground passages, and other tunnels. In this construction method, backfill grout is injected into the segments from backfill grout injection holes provided at predetermined intervals in order to fill the small gaps created between the segments attached by the excavator and the ground. The rest is blocked by a plug. Conventionally, this plug has been used only for the purpose of closing the injection port. On the other hand, at tunnel excavation construction sites, it is often necessary to make telephone calls from one construction site to another, requiring temporary installation of telephone lines, and also temporary installation of electric light lines due to the need for lighting. Needed. Conventionally, it was necessary to use these lines and cords as they are on the ground, or to temporarily install temporary bases for these cords inside the tunnel. In the former case, the cords may be stepped on by workers or transportation equipment, etc., resulting in damage, or workers may trip over the cords, which is dangerous. In addition to requiring extra work and expense, there were other problems such as the temporary base occupying a certain space in the workshop and being a nuisance.

(Purpose of the invention) In view of the above-mentioned conventional problems, the present invention does not require the use of a temporary base, and allows cords to be placed freely at a height that does not get in the way and in any direction. It is an object of the present invention to provide an overhead wire holder that can be used as a grout stopper and also allows for the permanent installation of cords within a tunnel. It is something.

(Structure of the invention) Therefore, the present invention is configured as a catenary wire holder that also serves as a grout plug, and has a closing plate at the lower end of the insertion part having a male thread, and has an overhead wire holding part approximately in the center of the lower surface of the closing plate. This is what I wanted to achieve.

(Example) Next, an example of implementation of the present invention will be described with reference to the drawings. In the figure, A is a grout plug-cum-overhead wire holder according to the present invention, which is equipped with a closing plate 2 at the lower end of a cylindrical insertion part 1, and has an overhead wire holding part 3 approximately at the center of the outer surface of the closing plate 2. However, holes 4 and 5 are provided in the trunk of the overhead wire holding section 3. A male screw 6 for screw fitting is formed surrounding the outer surface of the fitting portion 1, and the overhead wire holding portion 3 is formed in a substantially square horizontal section as shown in FIG. Holes 4, 4 are formed facing each other on one side facing each other, and holes 5, 5 are formed facing each other on the other side facing each other. In addition, 20 is a packing, and the grout plug-closing overhead wire holder A according to the present invention is the packing 20.
All other parts are integrally molded from plastic.

FIG. 3 shows an example of the use of the overhead wire holder A that also serves as a grout plug according to the present invention, in which a socket 9 is fitted and fixed into a hole 8 provided in a concrete segment 7, and a female thread is installed on the inner surface of the socket 9. 90 is provided. A check valve 10 for backfilling grout is screwed into the socket 9. The check valve 10 for backfill grout has a male thread 1 for screwing on the outer surface.
A flange 13 is provided on the inner peripheral edge of the lower end of the cylindrical body 12 having 1, and a part of the upper surface of the flange 13 has a
A valve plate 15 having a linear thin section 14 is fixed with screws 16. In addition, 17 is valve plate 1
5 Reinforcing ribs. The overhead wire holder A, which also serves as a grout plug according to the present invention, is screwed into the socket 9 from the inside of the tunnel, and cords such as telephone wires and electric light wires are directly inserted into the holes 4, 4, 5, 5, or the holes 4, 4 or 5, 5, and attach the cords to the hook to connect the cords to the overhead line. When inserting directly into the holes 4, 4, 5, 5, separate cords are inserted into the holes 4, 4 and 5, 5, respectively, so that the grout plug and overhead wire holder A according to the present invention can be inserted. The cords can be made to intersect at right angles, and the cords can also be bent at right angles by, for example, inserting the cords through the hole 4 and pulling them out from the hole 5. However,
Since the holes 4, 4 and the holes 5, 5 are provided at positions where the line connecting the holes 4, 4 and the line connecting the holes 5, 5 are perpendicular to each other, it is necessary to select either the holes 4, 4 or the holes 5, 5. By selecting the correct type, you can easily wire the cords. If a hook is used, only one of the holes 4, 4 or the holes 5, 5 may be provided. When a hook is used, the overhead wire can be attached in any direction by rotating the hook, and unlike the case where the wire is inserted directly into the holes 4, 4, 5, and 5, regardless of the size, shape, etc. of the hole. In addition, any kind of cord, thickness, etc. can be used for overhead lines. Fig. 4 shows another example of the overhead wire holding part 3, in which holes 4, 4, 5, and 5 are provided in a thick, substantially hemispherical body. As long as it can be hung or a cord can be directly inserted, its shape, size, etc. can be determined arbitrarily, and it can be formed separately from the insertion part 1, the closing plate 2, etc. using a different material, and the closing Board 2
It may also be fixed to. Furthermore, the fitting part 1 may be in the form of a filled cylinder instead of a hollow cylinder, and the closing plate 2 is not limited to a circular shape, but may be in a rectangular shape or the like so that it is easy to apply force when opening and closing. The material is not limited to plastic, and may be made of metal or the like. In addition, it can be used not only for temporary installation of telephone lines, electric light lines, etc. during tunnel excavation work, but also for closing back-filling grout inlets with the overhead line holder A that also serves as a grout plug according to the present invention, and the overhead line holding section 3 thereof. The concrete segment 7 may be coated with a decorative coating while the cords are attached to the overhead line, and used as a permanent overhead line.

(Effects of the invention) Since the present invention has the above-mentioned configuration, cords such as telephone lines, electric light lines, etc. can be crossed in all directions using plugs that block the backfilling grout inlets of concrete segments, and can also be used in any direction. Remarkable effects such as making it possible to install overhead wires in the tunnel, making it possible to install overhead wires extremely easily and inexpensively since no separate base for overhead wires is required, and preventing danger during tunnel excavation work. has.

[Brief explanation of the drawing]

1 to 3 represent an embodiment of the present invention,
Fig. 1 is a longitudinal section, Fig. 2 is a sectional view taken along line M-M in Fig. 1, Fig. 3 is a longitudinal sectional view for explaining an example of use, and Fig. 4 is a partial cutaway of another embodiment. FIG. 1... Inset part, 2... Closure plate, 3... Catenary wire holding part, 4, 5... Hole.

Claims (1)

[Scope of utility model registration request] A closing plate is provided at the lower end of the insertion part having a male thread,
An overhead wire holder that also serves as a grout plug and has an overhead wire holder at approximately the center of the lower surface of the closing plate.