JPH0932433A - Glass support structure of fire door - Google Patents

Abstract

(57) [Abstract] [Purpose] In a glass support structure for fire doors, suppressing the rise of temperature around the glass plate and maintaining the hardness of the periphery to prevent deformation of the glass plate and prevent it from coming out of the window frame. Prevent the glass plate from coming off. [Structure] A glass plate 2 is fitted into a window frame 1 via a heat insulating plate 8 and the heat insulating plate intervenes to greatly reduce the amount of heat transfer from the window frame to the glass plate, thereby softening by heating around the window frame. This prevents the glass plate from being pulled out of the window frame.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fire door, which is provided to prevent the spread of fire during a fire, and more particularly to a glass support structure for a fire door having a glass window.

[0002]

2. Description of the Related Art In order to prevent the spread of fire in the event of fire, passages and the like are blocked by fire doors, but some fire doors are provided with glass.

A conventional glass support structure for a fire door will be described with reference to FIG.

In the figure, reference numeral 1 is a window frame provided in the fire door,
A caulking groove 3 into which a glass plate 2 is fitted in the window frame 1,
A caulking groove 4 is formed. The caulking groove 4 on the lower side is formed by further attaching an auxiliary frame 5 to the window frame 1 so that when the glass plate 2 is fitted, the auxiliary frame 5 is removed.

When mounting the glass plate 2, a backup material 6 made of non-combustible material such as glass wool is first fitted into the caulking groove 3 and the caulking groove 4, and the glass plate 2 is fitted into the caulking groove 3 and the caulking groove 4. Then, the caulking material 7 was filled in the gaps between the caulking groove 3, the caulking groove 4 and the glass plate 2, and the glass plate 2 was held by the caulking material 7.

[0006]

When a fire occurs, the glass plate 2 is heated directly or through the window frame 1. When the glass plate 2 becomes hot, it softens and cannot maintain its shape.
When the glass plate 2 is pulled out from the caulking groove 3 due to the softening and deformation of the glass plate 2, the flame penetrates the glass window and the spread of fire cannot be prevented.

The present inventor notices that the shape maintaining ability of the glass plate is improved by suppressing the rise of the temperature around the glass plate and maintaining the hardness of the periphery, and the heat transfer from the caulking groove to the glass plate is performed. To prevent the glass plate from being deformed and pulled out in the event of a fire.

[0008]

SUMMARY OF THE INVENTION The present invention relates to a glass support structure for a fire door, characterized in that a glass plate is fitted into a window frame via a heat insulating plate, and the heat insulating plate is interposed. This greatly reduces the amount of heat transferred from the window frame to the glass plate, prevents softening due to heating around the window frame, prevents the glass plate from collapsing due to softening, and removes the glass plate from the window frame. To be prevented.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, the same parts as those shown in FIG. 2 are designated by the same reference numerals.

The window frame 1 has an upper caulking groove 3 into which the glass plate 2 is fitted and a lower caulking groove 4 formed therein. The caulking groove 4 on the lower side is further formed with an auxiliary frame 5 detachably provided on the window frame 1. By removing the auxiliary frame 5, the height of the bank on one side of the lower caulking groove 4 is lowered, and the caulking groove 3 of the glass plate 2 is
Fitting into the caulking groove 4 is possible.

When the glass plate 2 is attached, the auxiliary frame 5 is removed, and a heat insulating plate 8 having a U-shaped cross section is fitted into the bottoms of the caulking grooves 3 and 4 and then glass wool or the like. The non-combustible backup material 6 is laid. The glass plate 2 is fitted into the caulking groove 3 and the caulking groove 4 via the heat insulating plate 8, and the caulking material 7 is filled in the gap between the caulking groove 3 and the caulking groove 4 and the caulking material. The glass plate 2 is held by the material 7.

By interposing the heat insulating plate 8, the thermal resistance in heat conduction is increased and the effect of blocking radiant heat is produced. Further, by making the surface of the heat insulating plate 8 a mirror surface, it becomes more effective in blocking radiant heat. As the material of the heat insulating plate 8, a material having a low thermal conductivity or a material that maintains a mirror surface state, such as a stainless steel plate, is selected. Further, another example of the heat insulating plate 8 may be formed of ceramics or the like.

In the present embodiment, when the window frame 1 is heated during a fire, heat is transferred to the caulking material 7 via the heat insulating plate 8 and the backup material 6, and further to the glass plate via the caulking material 7. 2 is transmitted. Since the heat transfer is blocked by the heat insulating plate 8, the window plate 1 and the glass plate 2
The amount of heat transferred to the glass plate 2 due to heat is greatly reduced.
The softening of the periphery of the glass plate 2 is suppressed, and the glass plate 2 is prevented from being deformed.

Thus, the glass plate 2 is prevented from coming off the window frame 1.

The glass to be fitted into the window frame 1 is preferably meshed glass.

[0017]

As described above, according to the present invention, the heat insulation around the glass plate can be prevented by interposing the heat insulating plate between the glass plate and the window frame, and the glass plate is deformed by softening due to heat. Therefore, it is possible to prevent the shape of the glass plate from collapsing and prevent the glass plate from being pulled out from the window frame.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is a sectional view showing a conventional example.

[Explanation of symbols]

 1 Window Frame 2 Glass Plate 3 Caulking Groove 4 Caulking Groove 5 Auxiliary Frame 6 Backup Material 7 Caulking Material 8 Insulation Board

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Koichi Shibata 3-26-4 Shimura, Itabashi-ku, Tokyo Inside Bunka Shutter Co., Ltd.

Claims (1)

[Claims] 1. A glass support structure for a fire door, wherein a glass plate is fitted into a window frame via a heat insulating plate.