JPH0436191Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The present invention relates to a cable penetration structure in a partition wall of a building. The present invention relates to an improvement in a cable penetration part in a bulkhead when wiring a cable supported by a wiring rack therein.

[Prior art]

An example of a conventional structure of a cable penetration part of a bulkhead of a building is shown in Japanese Utility Model Publication No. 58-54809. The penetration structure of this conventional example is directly related to the fire spread prevention structure of the cable penetration part in bulkheads such as fire prevention compartments, but the penetration structure basically does not allow cables to pass through the building in the same way as before. The cable installation rack (hereinafter simply referred to as a cable installation rack) was passed through a through hole formed in the partition wall.

That is, as shown in FIG. 2, in general, the conventional penetrating part structure passes the cable 1 through the through hole 4 formed in the partition wall 3 for each installation rack 2, and at this time, the cable 1 is passed through the through hole 4 formed in the partition wall 3 for each installation rack 2. A fireproof material 5 such as rock wool is arranged on the partition wall 3, and fireproof plates 6 made of calcium silicate or the like are covered from both sides of the partition wall 3.
It was to be sealed with a flame-resistant sealing material 7.

[Problem that the invention attempts to solve]

However, in such a conventional cable penetration structure, the penetration hole must be relatively large in order to allow the entire cable installation rack to pass through the penetration hole. There was a problem in that the fire prevention measures needed to be filled with fireproof material, etc., were extremely large. On the other hand, in terms of construction during cable wiring, it is extremely difficult to place the cable installation rack into the through hole in an extremely narrow space, and the workability, including the work such as filling the fireproof material mentioned above, is extremely difficult. It had to get worse.

[Means for solving problems]

The purpose of this invention is to focus on the above-mentioned drawbacks of the conventional technology, and to improve workability when forming cable penetration parts in building bulkheads for cables supported by wiring racks, and to effectively exhibit fire prevention effects in such parts. An object of the present invention is to provide a structure for a cable penetration part of a bulkhead of a building.

In the cable penetration structure of the building bulkhead of the present invention, the cable penetration structure is supported by a wiring rack that is routed through a through hole formed in a building bulkhead. However, its end face is mechanically fixed to the surface of the partition wall around the through hole, and the cable passing through the through hole passes through the through hole with fire prevention measures taken between the walls of the through hole of the partition wall. It is characterized by the fact that

[Effect]

According to the present invention as described above, the cable laying rack is divided into sections for each section of the building, the end surfaces of which are mechanically adhered to the bulkhead, and the bulkhead has a through hole large enough to allow only the cable to pass through. is open. The cable that has been supported by a cable installation rack is passed through this through hole, and the cable exiting to the compartment on the opposite side of the bulkhead is similarly supported by another cable installation rack whose end face is closely attached to the bulkhead and held in place. Wired to.

〔Example〕

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the structure of a cable penetration part of a building bulkhead according to the present invention will be described in more detail with reference to preferred embodiments shown in the accompanying drawings.

FIGS. 1 and 3 show a structure of a cable penetration part of a bulkhead of a building according to an embodiment of the present invention.

In the cable penetration structure of this embodiment, a frame (cable installation rack) 2 for installing a cable 1 in a building is divided by a partition wall 3, and the end of the cable installation rack 2 is connected to an L-shaped fitting 8. The cable 1 is fixed to the surface of the partition wall 3 by the cable 1, and only the cable 1 is passed through the through hole 4 formed in the partition wall 3. A fireproof material 5 such as rock wool is filled around the cable 1 in the through hole 4.

In the above-mentioned embodiment, from the viewpoint of fire prevention, it is preferable to seal the entire end of the cable installation rack 2, including the part where the cable installation rack 2 is fixed to the surface of the partition wall 3, with a flame-resistant sealing material. It is more preferable.

In the above embodiment, the cable installation rack 2
Although the end portion of the L-shaped metal fitting 8 is fixed to the partition wall 3, the present invention is not limited to this, and it may be fixed to a suitable support such as a ceiling. The key is to hold the end of the rack in close contact with the partition surface.

In this way, cable installation racks 2 are individually formed for each section of the building partitioned by partition walls 3,
Since the ends of each rack 2 are brought into close contact with the surface of the bulkhead 3, allowing only the cable 1 to pass through the through hole 4 of the bulkhead, the cable installation racks are shorter than conventional ones, making them extremely difficult to handle. Moreover, since this rack does not pass through a through hole, the work can be done easily even in a small space. moreover,
The through-hole 4 formed in the partition wall 3 only needs to be large enough for the cable to pass through, unlike the conventional case where the entire rack is passed through. Therefore, the opening area is very small (approximately 1/4 compared to the conventional one). ) can,
This means that the amount of refractory material 5 filled around the cable can be reduced to about half, and the work is made easier.

[Effect of idea]

As explained above, according to the structure of the penetrating part of a building bulkhead for a cable supported by a wiring rack of the present invention, a cable laying rack is formed individually for each section in a building, and each rack is connected to the bulkhead. Stick to it,
By allowing only the cable to pass through the through-hole, the fire prevention section (through-hole) is significantly reduced, construction is easier, and construction costs are significantly reduced, which has significant practical effects. be.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a cable penetration part of a building bulkhead according to an embodiment of the present invention, Fig. 2 is a sectional view showing a conventional wiring penetration part, and Fig. 3 is a cable penetration part of Fig. 1. FIG. 1... Cable, 2... Cable installation rack, 3... Partition wall, 4... Through hole, 8... Fixing metal fittings.

Claims (1)

[Scope of utility model registration request] In a cable penetration structure supported by a wiring rack that is wired through a through-hole formed in a building partition wall, the wiring rack that supports the cable has an end surface on the partition wall surface around the through-hole. A cable of a bulkhead of a building, which is mechanically fixed and is characterized in that the cable passing through the through-hole passes through the through-hole with fire prevention measures taken between the walls of the through-hole of the bulkhead. Penetration structure.