JPS6339352Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a lower fire prevention device that prevents flames from leaking out from between the sliding door body and the floor in a sliding fire door.

The structure of conventional sliding doors is that the upper end of the sliding door is slidably suspended on a hanger rail or slide rail, and a certain amount of space is left between the lower end and the floor to allow the sliding door to open and close smoothly. was. Therefore, it was impossible to use this structure as a sliding fire door because flames would leak out from the bottom end.

Therefore, in order to prevent flames from leaking from the bottom end, a groove is formed on the floor surface in the bottom end of the sliding door body, corresponding to the flame shielding plate that protrudes upward along the opening and closing direction of the sliding door main body. Alternatively, a method has been considered in which a recessed groove is formed on the floor surface and a flame shielding plate is provided on the lower end surface of the sliding door body that protrudes into the recessed groove. In order to prevent leakage, the flame shielding plate must protrude to some extent, so in the former case, the shielding plate becomes an obstruction to the passage of stretchers, wheelchairs, etc., and in the latter case, the groove becomes a pool of dust. It was particularly inappropriate for hospitals.

The present invention solves the above-mentioned drawbacks with a simple structure, and provides a lower fire protection device for a sliding fire door in which the flame shielding plate does not protrude significantly above the floor surface and does not form a dust pool. The purpose is to

Hereinafter, the present invention will be explained based on the drawings.

Figure 1 shows a front view of the present invention when used in a sliding fire door, in which 1 is the sliding door body, 11
12 is a door pocket, 13 is a handle, 14 is a middle window, and 15 is a sliding door frame.

The sliding door main body 1 is supported by a sliding door support device (not shown) having an upper end inside a rammer 11 so as to be movable left and right.

In FIG. 2, the lower end surface 16 of the sliding door main body 1 has a space 17 that is open at the bottom and extends over the entire length in the width direction.

2 is a floor rail provided on the floor B side along the opening/closing direction of the sliding door body 1.

The floor rail 2 is embedded in the floor C and has base surfaces 21, 21 that are substantially flush with the floor surface B, and the base surface 2.
1, 21, the upper surface is continuous with the base surface 21,
Recesses 23, 23 located slightly below 21 and having inclined surfaces 22, 22 on the base surfaces 21, 21 side, and continuous to the recesses 23, 23, a lower end surface 16 of the sliding door main body 1 is located in the center. It is formed by a flame shielding part 24 that protrudes into the space 17. Reference numeral 25 designates floor rail rising stop pieces fixed at several locations in the width direction of the lower end surface of the floor rail 2. The present invention is constructed as described above, and the floor rail 2 is connected to the floor surface B and the base surfaces 21, 21.
The sliding door body 1 is embedded in the floor C so that it is almost flush, and the lower end surface 16 is flush with the base surfaces 21, 21.
Alternatively, it is suspended slightly below so as to be positioned within the recesses 23, 23.

In this state, the flame shielding plate 24 is located within the space 17 of the sliding door body 1, and its upper surface only protrudes slightly above the base surfaces 21, 21.

In other words, in the present invention, even if a fire occurs on either side of the sliding door body 1, the lower end surface 16 of the sliding door body 1 is flush with the floor surface or is located below, so the sliding door It is difficult for the flame to advance below the lower end surface 16 of the main body, and even if it does, the flame shielding plate 24 prevents it from leaking to the opposite side.

Moreover, since the recess 23 is only slightly recessed than the base surface 21, it does not become a dust trap, and by providing the recess 23, the lower end surface 16 of the sliding door body 1 is lowered below the floor surface B. Therefore, there is no need for the flame shielding plate 24 to protrude upwards as much as in the conventional case, so that it does not obstruct the passage of wheelchairs or the like.

Further, since the floor rail 2 has a simple structure of simply forming a recessed portion, it can be manufactured at low cost, and is a useful idea suitable for practical use.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and FIG. 1 is a front view of a sliding fire door equipped with the present invention, and FIG. 2 is an enlarged sectional view taken along the line A-A in FIG. 1. DESCRIPTION OF SYMBOLS 1... Sliding door body, 16... Lower end surface, 17... Space part, 2... Floor rail, 21, 21... Base surface, 2
3, 23... recess, 24... flame shielding part.

Claims (1)

[Scope of utility model registration request] A space is formed on the lower end surface of the sliding door main body and is open downwardly over the entire width direction, while a base surface located on the front and rear outer sides of the sliding door main body is substantially flush with the lower end surface in the horizontal direction, or is located slightly above. , a concave portion continuous to the inside of the base surface and having a slight gap with the lower end surface of the sliding door body, and a concave portion continuous between the concave portions, located within the space of the sliding door body and slightly above the base surface. A lower fire protection device for a sliding fire door, characterized in that a floor rail consisting of a flame shielding part protruding from the bottom is provided on the floor side along the opening/closing direction of the sliding door main body.