JPH0321150Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a fireproof structure for a cable penetration part in an access floor.

[Conventional technology and its problems]

In recent years, in order to realize fire prevention of building structures, fire prevention zones have been designated for each certain occupied space according to the Building Standards Act. In other words, in order to prevent a fire that occurs in one fire protection compartment from spreading to an adjacent fire protection compartment, it is mandatory to install a fire door or the like at the boundary between fire protection compartments. Therefore, for cables that cross between fire protection compartments, at the boundary part,
Two fireproof partitions separate the cables from adjacent fireproof compartments, and the cables between the fireproof partitions are hermetically covered with a fireproof filler to prevent the spread of fire in the same way as fire doors.

However, in recent years, the use of electronic devices such as computers and word processors has increased, and the amount of cables laid within building structures has rapidly increased. Therefore, in order to safely lay these cables and to facilitate changes in their laying positions, a so-called access floor structure as shown in FIG. 3 has been adopted.
That is, a second floor 3 is provided several tens of centimeters above the normal floor 2 in the room 1, and the space 4 between the conventional floor 2 and the second floor 3 is used as a space exclusively for laying the cable 5. The space is divided into squares so that a desired terminal of the cable 5 can be taken out from any square. Fire prevention within the room 1 above the second floor 2 is achieved by providing a fire door 6 and the like, as in the past. However, regarding fire protection of the cable 5 in the space 4 between the conventional floor 2 and the second floor 3, the second floor 3, which is called an access floor, is located close to the cable 5, and the space 4 is also arranged in a square shape. Since the cables are often partitioned, it has become almost impossible to achieve a fireproof structure by inserting two fireproof partition plates from the longitudinal direction of the cable 5 as in the past.

The present invention has been devised in view of these points, and is a fireproof structure for the cable penetration part in the access floor, which has an extremely simple structure, is easy to construct, and can reliably prevent the spread of fire to the cable. It provides:

[Means for solving problems]

The present invention includes a cable laid in a predetermined pattern in a space formed by a first floor and a second floor installed at a predetermined distance from the first floor, and cables laid on both sides along the length of the cable. A pair of first fixing devices arranged with fitting grooves facing the cable, a pair of second fixing devices arranged in parallel with the first fixing devices at a predetermined interval, and a tunnel section that crosses the cable. having both ends fitted into the fitting groove so as to be freely removable, and the first
A first fireproof partition plate fixed to a fixture and the second fireproof partition plate fixed to a fixture.
a second fireproof partition plate fixed to the fixture;
and a fireproof filler filled between the first and second fireproof partition plates so as to airtightly cover the cable between the second fireproof partition plates. be.

[Effect]

According to the fire protection structure of the cable penetration part in the access floor according to the present invention, the cable laid in the narrow space area between the first floor and the second floor is installed oppositely on both sides along the longitudinal direction at a predetermined part thereof. The first and second fireproof partition plates are fixed by a pair of first and second fixing devices, and these fireproof partition plates can be freely inserted and removed from the vertical direction. In addition, the part of the cable separated between the fireproof partition plates is airtightly covered with fireproof filler, so the structure is simple and easy to install.
It is possible to reliably prevent the spread of fire in the cable.

〔Example〕

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory diagram showing the configuration of the main parts of an embodiment of the present invention as viewed from above, and FIG.
FIG. 2 is an explanatory diagram showing the configuration of main parts of the same embodiment as viewed from the side. In the figure, 10 is a wall that partitions the access floor, and is made of fireproof material. The access floor is formed by a first floor 11 on the lower side and a second floor 12 provided above the first floor 11 with a predetermined distance L between them. 2nd floor 12
can be freely attached and detached from each of a large number of sub-section areas divided into a grid pattern. 1st floor 11
The space area formed between the first floor and the second floor 12 is divided into fire protection sections 13 and 14, which are made up of a plurality of sub-areas. Therefore, these fire prevention sections 13 and 14
A bundle 16 of multiple cables 15 passes through the
has been installed. Partitioning concrete columns 17 are installed at predetermined intervals on the boundary line between the fire protection compartments 13 and 14.
is provided. On both sides of the partition concrete column 17, one of a first fixture 18 and a second fixture 19 each having fitting grooves 18a and 19a is attached. In the central part between the two partitioning concrete columns 17, the remaining first fixture 18' and second fixture 19' each have a fitting groove 18a',
19a' is arranged to face the fitting grooves 18a, 19a. The first fireproof partition plate 20 and the second fireproof partition plate 21 are made movable in and out by fitting both ends into these opposing fitting grooves 18a, 18a', 19a, and 19a', and the first fixture 1
8, 18' and second second fixtures 19, 19', respectively. The first fireproof partition plate 20 and the second fireproof partition plate 21 each have a tunnel portion that crosses the bundle 16 of the cables 15. Fireproof putty 2 is applied to the bundle 16 of the cable 15 that has penetrated the tunnel.
2 is attached. The first fireproof partition plate 20, the second
In the area separated by the fireproof partition plate 21 and the partition concrete pillars 17 provided on both sides thereof, a fireproof filler is placed so as to airtightly cover the bundle 16 of the cables 15 that spans the fireproof partitions 13 and 14. 23 is filled.

According to the fire protection structure of the cable penetration part in the access floor configured in this way, the first fixtures 18 and 1 are attached to the boundary line between the fire protection compartments 13 and 14.
8' and second fixtures 19, 19', and by fitting and fixing the first fireproof partition plate 20 and the second fireproof partition plate 21 from above, the first floor 1 can be easily fixed.
The space area between the first and second floors 12 can be separated into fireproof partitions. Moreover, the cable 1 in the area separated by the first fireproof partition plate 20 and the second fireproof partition plate 21
5 bundle 16 includes fireproof putty 22 and fireproof filler 23
Since it is completely hermetically sealed, the cable 15
It is possible to reliably prevent the spread of fire.

[Effects of the invention] As explained above, the fire protection structure of the cable penetration part in the access floor according to the invention has an extremely simple structure, is easy to construct, and can reliably prevent the spread of fire to the cables. It is.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the configuration of the main parts of an embodiment of the present invention as viewed from above, and FIG. 2 is an explanatory diagram showing the configuration of the main parts of the embodiment as seen from the side. , FIG. 3 is an explanatory diagram showing the arrangement of cables on the access floor. 10...Wall, 11...1st floor, 12...2nd
Floor, 13, 14... Fire protection compartment, 15... Cable, 16... Cable bundle, 17... Partitioning concrete column, 18, 18'... First fixture, 19,
19'...Second fixture, 18a, 18a', 19a,
19a'... Fitting groove, 20... First fireproof partition plate, 2
1... Second fireproof partition plate, 22... Fireproof putty, 23
...Refractory filling material.

Claims (1)

[Scope of utility model registration request] Cables are laid in a predetermined pattern in a space formed by a first floor and a second floor installed at a predetermined distance from the first floor, and cables are installed on both sides along the longitudinal direction of the cables. A pair of first fixing devices arranged with matching grooves facing each other, a pair of second fixing devices arranged in parallel with the first fixing devices at a predetermined interval, and a tunnel portion that crosses the cable. a first fireproof partition plate fixed to the first fixture and a second fireproof partition plate fixed to the second fixture, both ends of which are fitted into the fitting groove so as to be freely removable and removable; and a fireproof filler filled between the first and second fireproof partition plates so as to airtightly cover the cable between the second fireproof partition plates, and a cable passing through the access floor. Department of fire protection structure.