JPH028011Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention is applicable to reinforced concrete buildings.
The present invention relates to a fireproof drainage hole that allows water leakage from installed equipment to be drained easily and at low cost.

BACKGROUND ART Conventionally, there has been a problem in how to drain water leaking from installed equipment in reinforced concrete buildings.

If this measure were to include full-scale drain piping that penetrates the building frame wall or is buried, it is unclear whether water will leak from the installed equipment because it only occurs in emergencies and does not occur on a regular basis. This method has the disadvantage of high costs because it requires serious measures to be taken.

Therefore, as a result of studies in view of the above-mentioned drawbacks, the present invention has been developed with a fire-resistant drainage hole that can easily and inexpensively drain leakage water in an emergency. A through hole is provided surrounded by a driving frame, and an inner lid receiving plate is provided around the lower end of the through hole that protrudes toward the inside of the through hole. An inner lid body with a certain level of fire resistance is placed as a fireproof compartment made by hardening cotton-like fireproof material such as sprayed asbestos with glue and forming it into a plate shape. By installing a drain plate that also serves as a lid to prevent removal,
Water leaking from equipment installed in a reinforced concrete building flows into the through hole from the drainage plate, and the inner lid, which has fire-resistant properties, gets soaked with water and swells, becoming heavier and losing its shape when opened. Since a drainage hole is formed by covering the lid, a certain level of fire resistance performance as a fireproof compartment is always ensured, while leakage water can be drained easily and at low cost in an emergency.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

FIG. 1 is a partial plan view of a fireproof drainage hole showing an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the same portion, and FIG. 3 is a bottom view of the same portion.

In FIG. 2, reference numeral 1 denotes a through hole, which is provided at a corner of a concrete floor 2 surrounded by a steel casting frame 3. An inner lid receiving plate 4 projecting toward the inside of the through hole 1 is provided around the lower end of the through hole 1 . On the inner cover receiving plate 4, an inner cover body 8 is placed, which is formed by hardening dry-blown asbestos, which is a fireproof material 5, with glue and forming it into a plate shape.

In addition, as shown in the illustrated example, in order to hold the plate-shaped inner lid body 8, a steel mesh core material 6 is provided horizontally in the center of the fireproof material 5, and the end portions of the steel mesh core material 6 are provided horizontally. A support piece 7 having an inverted L-shaped cross section may be provided on which the support piece 7 is placed and held. The thickness of this inner lid body 8 may be as long as it has a predetermined fire resistance.

This inner lid body 8 normally has a certain level of fire resistance as a fireproof compartment, but when it is flooded by water leaking from installed equipment in an emergency, this inner lid body 8 swells and becomes heavy. The glue and asbestos, which is a refractory material, lose their shape and melt due to water leakage and fall, opening the lid and forming a drainage hole.

After the leakage water is drained through this drainage hole, the inner lid body 8 is replaced with a new one.

In addition, in order to prevent direct clogging due to falling refractory material 5, the through holes 1 should not be installed at the same location on the upper and lower floors.

A drainage perforation plate 10 which also serves as a punch-through prevention lid is placed on the upper part of the through hole 1 via a perforation plate holder 9.

As explained above, according to the present invention, by placing the inner lid body made of fireproof material etc. on the inner lid receiving plate and providing fireproof drainage holes in the concrete floor, a certain level of fire resistance performance as a fireproof compartment can be maintained at normal times. However, in the event of an emergency, the inner lid swells due to water leakage, becomes heavier and loses its shape, and the melted glue and refractory material from the inner lid falls and opens to form a drainage hole. , water leakage can be drained easily and at low cost in an emergency without using full-scale drainage equipment.

[Brief explanation of the drawing]

FIG. 1 is a partial plan view of a fireproof drainage hole showing an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the same portion, and FIG. 3 is a bottom view of the same portion. 1...Through hole, 2...Concrete floor, 3...
Steel driving frame, 4... Inner lid receiving plate, 5... Fireproof material, 6... Steel mesh core material, 7... Supporting material, 8...
...Inner lid body, 9...Perforated plate holder, 10...Drainage perforated plate.

Claims (1)

[Scope of utility model registration request] A through hole surrounded by a steel pouring frame is provided at the corner of the concrete floor, and an inner lid receiving plate is provided around the lower end of the through hole that protrudes toward the inside of the through hole. An inner lid body having a certain level of fire resistance, which is formed into a plate shape by hardening cotton-like refractory material such as dry-sprayed asbestos with glue, is placed on the plate, and a perforated plate holder is placed at the top of the through hole. A fire-resistant drainage hole characterized in that a drainage hole which also serves as a stepping-through prevention lid is placed through the hole.