JPS6122451Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a cable line laid in a tunnel.

Cables installed in tunnels, especially OF cables, are installed in flame-retardant FRP troughs to prevent the fire from spreading into the tunnel in the unlikely event that a fire occurs due to a cable accident. Cables may be laid. Therefore, in the past, fire-retardant materials were installed on the arms attached to the vertical supports in the tunnel.
An FRP trough is placed on the trough, and cables and water-cooled pipes are installed on this trough.

However, in such a system, the width of the trough is limited to the width that can be placed on one arm, so the space inside the trough is inevitably narrowed, and the cable is The width of the snake shape applied to the cable cannot be made sufficiently large, and the safety of the cable line cannot be fully ensured due to excessive strain occurring in the cable sheath.

The cable line installed in a tunnel according to the present invention has a configuration that can eliminate the above-mentioned disadvantages, and the split-type trough bodies are joined by a split-type joint consisting of an upper piece, a lower piece, and both side pieces. One side piece of the split type joint is supported on the outside by a bolt to a vertical support, and the bolt is used to support an arm on the inside of the same side, and the cable forming a vertical snake is supported by the arm. This is a characteristic configuration.

The present invention will be explained below with reference to the drawings.

FIG. 1A is a partial side (portion A) vertical sectional view showing the cable line according to the present invention, and FIG. 1B is a bb--b sectional view in FIG. 1A.

In FIGS. 1A and 1B, 1, . . . are vertical supports supported within the tunnel. T is a cable trough, which is composed of a split-type trough body M and a split-type joint N. 2, . . . are arms to which sleepers 21 are attached.

As shown in FIG. 2, the joint N is supported by a bolt and nut 3 on one side of the vertical support 1, and one end of the arm 2 is supported by the bolt and nut 3.

W, ... is a cable (OF cable),
It is supported on the armrest 2 and forms a vertical snake. This vertical snake can be made with sufficient vertical dimension by utilizing the space between the upper and lower arms.

5,・5′・ is a water-cooled pipe for cable cooling,
The water cooling pipes 5, 5 disposed above are suspended from the arm 2 by a hanger 51, and the water cooling pipes 5', 5' disposed below are supported on the arm 2. In addition, 2a in the figure is a groove formed on the arm 2 for locking the hanger 51.

In the above, the trough T is the FRP shown in Figure 3.
FRP joint split pieces (upper piece B ₁ , lower piece B ₂ , and both side pieces A ₁ , A ₂ ) and FRP trough split pieces (upper piece C ₁ , lower piece C ₂ , and both side pieces D ，
It is assembled from D′).

The procedure for assembling the above-mentioned trough as well as the procedure for constructing the cable line laid in the tunnel shown in FIGS. 1A and 1B will be explained below.

First, one side piece A ₁ of the joint shown in Fig. 3
As shown in _FIG .
It is supported by a nut 3, and one end of the arm 2 is supported on the vertical support 1 by this bolt/nut 3.

Next _{, the} trough _side piece D in FIG _. Part D is composed of two members, but these two members can also be integrally molded), and then the cable W, ... (already drawn into the tunnel) is placed on the arm 2, .... be carried on board). This cable has slack to form a vertical snake. On the other hand, some of the water cooling pipes 5, . . . are suspended from the arm 2 by hangers 51, .

Cables W,... and water cooling pipes 5,..., 5'...
After laying the trough upper piece C ₁ and the trough lower piece C ₂ at the ears d, fit into the groove a 1 on the upper end side and the groove _{a 3 on} the lower end side of the joint side piece A ₁ , respectively. do.

After these are fitted, connect the forked claw of the upper joint piece B ₁ to the fork adapter a ₄ at the upper end of the side piece A ₁ of the joint one side.
b ₁ and _the two-pronged claw b 2 of the lower joint piece B 2 into the two-pronged adapter a ₅ at the lower end of the side piece _{A 1} of the above joint.

In this case, the edge of the upper joint piece _B1 is overlapped with the end of the upper trough piece _C1 , and the edge of the lower joint piece _B2 is overlapped with the end of the lower trough piece _C2 .

After that, the trough other side side piece D' is placed between the above trough upper piece _C1 and the trough lower piece _C2 (this trough other side side piece D' is the same as the above trough side side piece D'). It is the same as D, and as mentioned above, the upper and lower members can be integrally molded). In this case, there is no overlap between the trough other side piece D' and the joint upper piece B, _b''1 , the joint lower piece _B2 , _{b2 '} ' (the joint upper piece B1 and the joint lower piece _B2) . , because there are notches 7, 7).

After arranging the trough side piece D′ as described above, fit the upper end of the joint side piece A ₂ into the protrusion b ₁ ′ of the joint upper piece B ₁ at its notch a ₁ ′. , insert the tongue piece b ₁ ″ of the joint upper piece B ₁ into its screw hole h
At this point, the joint and other side pieces A ₂ are fastened to the screw holes h at the upper end of the joint with screws, and on the other hand, the joint and other side pieces A ₂
At its notch a ₃ ′, fit the lower end of the joint into the convex portion b ₂ ′ of the lower joint piece B ₂ , and the tongue piece _{b 2 ″} of the lower joint piece B 2
At the screw hole h, connect the joint to the screw hole h at the lower end of the side part _A2 with a screw. In this case, the ear part d′ of the trough upper piece C ₁ and the other side part of the trough
The ear part d″ of D′ is the groove at the upper end of the side part A ₂ of the joint.
In a ₁₁ , the ears d″, d″ of the trough other side side piece D′ are connected to the groove a ₁₂ in the middle of the joint other side piece A ₂ , and the ears d″ of the trough other side side piece D′. The ears d of the trough lower piece _C2 are fitted into the grooves _a13 at the lower end of the joint side piece _A2 .

In the above, the ears of each piece of the trough are joined by a U-shaped jointer J via a packing P, as shown in FIG. In Figure 1A, J,...
...indicates a U-shaped jointer. Also, the joint N assembled from the various parts of the joint as described above
Packings are also attached to the fitting parts of the trough main body M assembled from the trough parts, but illustration of these packings is omitted.

The cable installed in a tunnel according to the present invention has the configuration as described above, and as shown in _FIG . The arm 2 is supported on the inner surface of the same side piece _A1 ,
Therefore, a split type joint formed by fitting the upper piece, the lower piece, and both side pieces into each other is supported by the vertical support at the side piece _A1 , and this split type joint connects the trough body. Because of this, the trough can be made into an airtight structure and has a good disaster prevention function. Also,
Since the trough itself is joined with a joint, and this joint is supported by the vertical support as described above, even a large trough can be stably supported, and it is therefore possible to store cables in several levels above and below, as shown in Figure 1A. This makes it possible to use a large trough as large as possible, and the vertical snake width of the cable vertical snake can be increased.

[Brief explanation of the drawing]

FIG. 1A is a partial side vertical sectional view showing a cable line according to the present invention, and FIG. 1B is b in FIG. 1A.
-b sectional view, Fig. 2 is an explanatory diagram showing the support structure of the trough and armrest in the present invention, Fig. 3 is a perspective view showing the trough assembly member pieces used in the present invention, and Fig. 4 is used in the present invention. FIG. 3 is an explanatory diagram showing a joining structure of the trough member pieces. In the figure, T is the trough, 2, 2... are the arms,
W, W... are cables.

Claims (1)

[Scope of utility model registration request] The split-type trough bodies are joined by a split-type joint consisting of an upper piece, a lower piece, and both side pieces, and one side piece of the split-type joint is supported on the outer surface by a bolt to a vertical support. A cable line installed in a tunnel, characterized in that an arm is supported by bolts on the inner surface of the same side piece, and a cable forming a vertical snake is supported by the arm.