JPH0261585B2 - - Google Patents

Description

[Detailed Description of the Invention] In recent years, with the remarkable development of information and communication technology, wiring and piping for automation system equipment can no longer be handled simply within the floor slab, and have to be installed on the floor of the office. The number of cases is also increasing. As one solution to this problem, a free access floor has been developed in which floor units are placed at intervals on the floor base, and electric wires and piping are placed directly on the floor base.

However, in the existing access floor, electric wires and cables made by bundling multiple electric wires and covering them are exposed, so overcurrent etc.
If a flame ignites for some reason, there is a danger that the flame will spread rapidly. Furthermore, even if there is no flame ignition, there is a risk that the smoke may cause abnormalities in the various contacts of the equipment, or that the equipment itself may become unusable.

The present invention has been proposed in order to solve these problems, and it supports floor units at intervals on the floor base of a building, and also arranges electric wires and cables directly on the base. In the floor structure consisting of the above-mentioned floor unit and the floor base on which the above-mentioned electric wires and cables are arranged,
A flexible heat-resistant noncombustible material that follows and contacts the shape of the outer peripheral surface of the cable is arranged, and the electric wire cable is sandwiched between the lower surface of the heat-resistant noncombustible material and the floor base, and the heat-resistant noncombustible material The present invention relates to a floor structure of a building, characterized in that a plurality of closed spaces are defined in the space between the floor base and the floor unit.

In the present invention, as described above, the above-mentioned electric wires and cables are placed in the space formed between the floor base on which electric wires and cables are directly disposed, and the floor units disposed at intervals on the base. A flexible heat-resistant, non-combustible material is placed on the outer surface of the electric wires and cables so as to follow their shape and come into contact with them, and the heat-resistant, non-combustible material prevents multiple blockages in the space between the base and the floor unit. Since the spaces have been defined, these closed spaces constitute a fireproof compartment. Therefore, if the electric wire or cable burns for some reason, the closed space defined by the heat-resistant non-combustible material prevents the combustion from spreading, and the flexible heat-resistant non-combustible material It comes into contact with the outer surface of the cable and blocks the passage of flame and smoke into the closed space, suppressing the spread of fire and preventing smoke leakage.

As described above, according to the present invention, a floor structure of a building with high disaster prevention performance that prevents flames and smoke leakage is constructed. This method is particularly effective on low OA floors with a floor height of 100 mm, as it is difficult to install fluorocarbon gas piping due to space constraints.

The present invention will be described below with reference to the illustrated embodiments.

1 is a floor base of a building, 2 is a floor unit with vertical and horizontal dimensions a and b, respectively, which is arranged on the base 1 via a support 3 with a height adjustment device, maintaining a predetermined interval, Electric wires and cables 4 are placed directly on the base 1.

A heat-resistant, noncombustible material 5 having flexibility that extends between the floor unit 2 and the floor base 1 and follows the shape of the outer peripheral surface of the electric wires and cables 4 and comes into contact with them.
The electric wires and cables 4 are arranged so as to be sandwiched between the lower surface of the heat-resistant and non-combustible material 5 and the floor base 1, and the heat-resistant and non-combustible material 5 connects the floor base 1 and the floor unit 2. A plurality of sealed spaces are defined in the
The heat-resistant noncombustible material 5 constitutes a flameproof partition material.

As the heat-resistant and noncombustible material 5, for example, a noncombustible inorganic sponge (trade name: RITFLEX, manufactured by Nippon Asbestos Co., Ltd.) is used.

The inorganic sponge has a small unit volume weight.
It is a fluffy matte-like substance weighing 0.02g/ ^cm3 .
Heat-resistant and noncombustible materials easily deform and conform to the shape of their surroundings when pressed lightly;
This will seal the gap between the wire or cable and the heat-resistant, non-combustible material.

Since the illustrated embodiment is configured as described above, even if the wiring or cable 4 burns out due to some reason, the spread of the flame is prevented by the heat-resistant noncombustible material 5 that constitutes the flameproof section. At the same time, the supply of oxygen to the fireproof compartment is cut off, preventing smoke leakage.

The size of the fireproof compartment made of the heat-resistant, noncombustible material 5 is determined by the height of the floor unit 2, the material and quantity of the electric wires and cables 4, the degree of risk of ignition, and the like.

The fireproof compartment is also applicable to a multi-layered floor structure, and the contact points of the fireproof compartment can be either a butt type or a lap type depending on the content of the floor structure.
Further, although the heat-resistant and noncombustible material 5 is usually attached to the floor base material in advance, it is also possible to install it separately.

[Brief explanation of the drawing]

1 and 2 are plan views showing examples of the floor structure of a building according to the present invention, and FIGS. 3 and 4 are a longitudinal sectional view and a longitudinal sectional side view, respectively. 1... Floor base, 2... Floor unit, 4... Electric wire,
Cable, 5...Heat-resistant non-combustible material.

Claims (1)

[Claims] 1. In a floor structure in which a floor unit is supported at intervals on a floor base of a building, and electric wires and cables are placed directly on the base, the floor unit and the electric wire cable are installed. A flexible heat-resistant, noncombustible material that follows the shape of the outer peripheral surface of the electric wires and cables and comes into contact with the floor base is disposed between the lower surface of the heat-resistant and noncombustible material and the floor base. A floor structure for a building, characterized in that the electric wires and cables are sandwiched and a plurality of closed spaces are defined in the space between the floor base and the floor unit by the heat-resistant and noncombustible material.