JPH10118208A - Fireproof structure of automatic door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To establish a fireproof performance of an automated door by accommodating an engine box for operating the door in a crosswise frame of an auto-door unit, injecting a fireproof gel-form foaming agent which foams at a high tamp. to make expansion in the volume, to the inside surfaces of the engine box, and enclosing its internal components with the foaming agent. SOLUTION: Among the inside circumferential surface of an engine box 2 to be accommodated in a crosswise frame 1 of an auto-door unit, a gel-form foaming agent 3 is injected to the surface on the side where a controller 5 is in contact with the external air. In case the controller 5 is fixed to the base 21, the foaming agent 3 is injected to the inside surface of a cover 22 in such a way as enclosing the controller 5. The foaming agent 3 should preferably consist of a graphite series material having a nature to expand only across the thickness at the time of heating. Thereby the foaming agent is expanded to approx. 7-8 times at a high temp. with a fire occurrence, and the agent 3 attached to the cover 22 is allowed to foam so as to fill the voids in the engine box 2, and the controller 5 is put out of contact from the external air to establish the intended fireproof performance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire protection structure for an automatic door, which imparts fire protection performance to the automatic door.

[0002]

Many automatic door units installed at the opening of a building are required to have fire protection performance in accordance with the Building Standards Law. Since the engine parts and the wiring for the operation of the vehicle are often made of a highly flammable material such as a resin part, the conventional automatic door unit cannot be said to have substantially the fire protection performance.

[0003] The engine parts are stored in the engine box in the horizontal frame. According to a fire prevention test for the automatic door unit, even in the engine box, the flammable resin parts melt and drip, or the flammable resin parts fall. Because of the generation of gas, engine components are a weak point in fire protection.

[0004] Further, from the opening formed for opening and closing the door, hot air enters the horizontal frame during a fire prevention test and deforms the horizontal frame by heat, thereby affecting the fixed state of the engine box. The opening also becomes a weak point in fire prevention.

In view of the above background, the present invention proposes a fire protection structure for an automatic door that hides a fire prevention function during normal use and exhibits a self-fire prevention performance depending on the surrounding heating temperature during a fire.

[0006]

According to the first aspect of the present invention, a fire-resistant gel-like foaming agent which expands and expands in volume at a high temperature is injected into the inner peripheral surface of the engine box, or a sheet-like foaming agent is injected into the engine box. Attaching and covering parts in the engine box with a foaming agent prevents fire spread to engine parts in case of fire,
Adds fire protection to automatic doors.

The foaming agent foams in the engine box when the temperature around the engine box becomes high due to the occurrence of a fire,
By sealing the space around the engine parts, the supply of oxygen into the engine box is shut off, and the combustion of the engine parts including the wiring is prevented.

According to a second aspect of the present invention, a molded fire-resistant foaming agent is installed at both sides of the opening of the horizontal frame in the direction of the door, thereby closing the opening of the horizontal frame in the event of a fire and preventing deformation of the horizontal frame due to heat. To prevent.

The foaming agent installed in the opening fills the gap between the opening and the door by foaming in the event of a fire, prevents hot air from entering the horizontal frame from the opening, and protects the inside of the horizontal frame from hot air. . Since the inside of the horizontal frame is protected from hot air, the horizontal frame itself is stable against deformation, so that the engine box also maintains stability in the horizontal frame. In this case, the engine parts are double protected inside and outside the engine box.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, a part of an engine box 2 housed in a lateral frame 1 of an automatic door unit is protected from fire by a fire-resistant foaming agent 3 as shown in FIG. Protected.

A horizontal frame 1 is an upper frame or blind, and an engine box 2 surrounds a controller 5 which controls the opening and closing of a door 4 and includes a number of engine parts as shown in FIGS. It is fixed in the frame 1.

In FIG. 1 and FIG. 2, the engine box 2 comprises a flat base 21 to which the controller 5 is fixed, and a cover 22 having a groove-shaped cross section in which end plates 23, 23 are integrated at both ends. The base 21 is held on the rail 7, on which the door roller 6 of the door 4 runs, fixed inside the base 1, and the base 21 is covered with a cover.
By connecting 22, the engine box 2 is fixed to the horizontal frame 1.

The foaming agent 3 is provided on the inner peripheral surface of the engine box 2.
The controller 5 is injected in a gel state on the surface on the side in contact with the outside air, or is adhered in a sheet state.
In the case of the drawing in which the controller 5 is fixed to the base 21, the controller 5 is injected or affixed to the inner peripheral surface of the cover 22 so as to cover the controller 5 from the cover 22 side, and adheres to the inner peripheral surface of the cover 22. The foaming agent 3 is injected or attached over the entire circumference of the cover 22. In the case of the drawing, the controller 5
The surface of the base 21 is in contact with the outside air because it is in contact with the base 21, but when the surface of the base 21 is placed in contact with the outside air, the foaming agent is also applied to the inner peripheral surface of the base 21. 3 is injected or affixed.

The foaming agent 3 is a graphite-based foaming agent having the property of expanding only in the thickness direction when heated when injected or affixed to the inner peripheral surface of the engine box 2 (for example, Chems Linz Co., Ltd. MEX (registered trademark)) is used.

[0015] The graphite-based foaming agent is specifically 150 ° C.
And expands at a foaming ratio of about 10 times the normal temperature, and expands about 7 to 8 times in the engine box 2 under the high temperature at the time of fire, thereby sealing the gap between the controller 5 and the cover 22. In the case of the drawing, the foaming agent 3 attached to the cover 22 foams so as to fill the gaps left in the engine box 2 and cuts off the contact between the controller 5 and the outside air.

The invention according to claim 2 is an engine box 2
The inside of the horizontal frame 1 is protected from hot air by installing a molded foaming agent 9 in the opening 8 portion of the horizontal frame 1 in addition to the internal foaming agent 3.

As the foaming agent 9, the above-described graphite-based foaming agent having a property of expanding only in the thickness direction when heated in a plate-like state is used.

The opening 8 is formed on the lower side or upper side of the horizontal frame 1 where the door 4 is arranged. The door 4 is connected to the door wheel 6 by the bracket 10 through the opening 8.

Pockets 11 and 11 for installing a foaming agent 9 are formed on both sides of the horizontal frame 1 in the expected direction of the door 4, and the foaming agent 9 is laid in the pockets 11 and 11. In FIG. 1, a pocket 11 for the foaming agent 9 and a pocket 11 for laying an airtight material 12 such as mohair for securing airtightness between the door 4 and the horizontal frame 1 are formed in parallel in the height direction. . Since the pocket 11 is originally formed for laying an airtight material on the horizontal frame 1, the foaming agent 9 can also be attached to the horizontal frame 1 of the existing automatic door.

The foaming agent 9 is continuously laid in the longitudinal direction of the horizontal frame 1 as shown in FIG. 2, and the surface on the side of the opening 8 is placed in a state where it is exposed to the outside air. It foams in the expected direction 1 and closes the gap between the door 4.

[0021]

According to the first aspect of the present invention, a fire-resistant gel which expands and expands in volume at a high temperature on the inner peripheral surface of the engine box.
Alternatively, by injecting or affixing a sheet-like foaming agent, the components inside the engine box are covered, so that the combustion of the engine components at the time of fire can be prevented, and the automatic door can be provided with fire protection performance.

According to the second aspect, between the opening of the horizontal frame and the door,
By installing a molded fire-resistant foaming agent, hot air can be prevented from entering the horizontal frame from the opening, so that deformation of the horizontal frame due to heat can be prevented and stability in the horizontal frame of the engine box is also improved. Can be maintained.

Further, since the engine parts are double protected inside and outside the engine box, the fire prevention performance of the automatic door is improved.

[Brief description of the drawings]

FIG. 1 shows an injection state of a foaming agent into an engine box,
It is a longitudinal section of the automatic door unit which showed the installation state of the foaming agent formed in the opening part.

FIG. 2 is a front view showing the inside of a horizontal frame.

[Explanation of symbols]

1 ... horizontal frame, 2 ... engine box, 21 ... base,
22 ... cover, 23 ... end plate, 3 ... foaming agent, 4 ... door, 5 ... controller, 6 ... door roller, 7 ... rail,
8 ... opening, 9 ... foaming agent, 10 ... bracket, 11 ...
Pockets, 12 ... airtight.

Claims (2)

[Claims] 1. A fire prevention structure for protecting parts in an engine box housed in a horizontal frame of an automatic door unit from fire, wherein the foam expands on the inner peripheral surface of the engine box at a high temperature and expands in volume. An automatic door fire protection structure in which a foaming agent in the form of a gel or sheet is injected or affixed, and the inside of the engine box is covered with the foaming agent. 2. A molded fire-resistant foaming agent which foams under high temperature and expands in volume at both sides of an opening formed on the side of the horizontal frame where the door is arranged, in the expected direction of the door. The fire prevention structure for an automatic door according to claim 1, which is installed.