JP2585466B2 - Elevator landing doorway device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an elevator landing doorway device, and in particular,
The present invention relates to a safe entrance / exit device that does not fall off or generate an opening when a fire occurs on the landing side.

[Conventional technology]

As described in Japanese Patent Publication No. 54-75834, the conventional apparatus is configured such that the upper hanging wheel does not come off the door rail when the door is deformed, and that the shoe at the lower end of the door does not come off from the guide groove (deformation and deformation). (A means for preventing the shoe from coming off the guide groove by the action of shortening the door by water discharge during digestion).

Further, as described in Japanese Patent Publication No. 60-16557, when the door is in a closed state, a hook portion overlapping and facing in the thickness direction of the door is formed between adjacent door ends, and between the vertical frame and the door end. A means is provided between them for restraining fire and deformation during water discharge.

Further, as disclosed in JP-A-1-252485, an emergency guide member is projected from the lower end of the door toward the inside of the threshold groove by sensing the temperature to prevent the door from coming off from the threshold groove. As described in Japanese Patent No. 252486, it is also considered that a connecting tool made of a shape memory alloy is attached to the lower end of the door, and the connecting tool is fixed in the sill groove by a rise in temperature to prevent the door from coming off the sill groove. I have.

[Problems to be solved by the invention]

Among the above prior arts, the technology described in Japanese Patent Publication No. 54-75834, Japanese Patent Publication No. 60-16557, and Japanese Patent Application Laid-Open No. HEI 1-2252485 discloses a door stop due to a lateral deformation of a door due to heat during a fire. Is not considered about the expansion of the gap,
According to the technology described in Japanese Patent Application Laid-Open No. 1-252486, the influence of heat at the time of fire is first received from the upper part of the door and gradually reaches the lower part of the door. The deformation operation becomes sharp, and there is a problem that the door is laterally deformed before the connecting member is fixed in the threshold groove.

If the door is deformed laterally due to heat in a fire and a gap is created at the door stop, fire or smoke enters the hoistway, and the hoistway, which is the vertical space of the building, becomes a chimney state. There was a risk of fire spreading.

An object of the present invention is to provide an elevator hall entrance apparatus capable of preventing lateral deformation of a door even in a fire.

[Means for solving the problem]

In order to achieve this object, the present invention fixes a downwardly projecting pin to the lower end of the landing door at the door stop side,
In the closed state of the landing door, an engaging hole of a size that the pin can engage with is provided at a groove bottom of the sill facing the pin, and a gap between the lower end of the pin and the groove bottom of the sill is formed with the lower end of the landing door. It was set smaller than the gap with the upper surface of the threshold.

[Action]

According to the above configuration, when a fire occurs in a building or the like at the landing side of the elevator landing doorway, the landing door is exposed to high heat on the front side, the back side is exposed to the air of the hoistway, is in an air-cooled state, and is made of metal. The door rapidly expands and deforms to the front side at the same time as the door rapidly expands (because the temperature difference between the front and back surfaces and the upper and lower sides are stopped by each device, the door deforms convexly). This convex deformation increases with time. With this convex deformation, the door stop of the door causes a movement that spreads in the left-right direction, the door pocket direction, and expands the opening. According to the present invention, the pin engages with the engagement hole at an initial stage of heating, and the door moves left and right. Because of the restraint, the expansion of the opening is limited. A door interlock device, which is legally required, functions at the upper end of the door, and movement in the left-right direction is restricted. Therefore, the door of the present invention is restricted from moving up and down and from side to side, so that a large opening does not occur at the door stop. Further, since the pin is provided with a slope at the tip, it can be easily engaged with the engaging hole at the stage of initial elongation.

〔Example〕

Hereinafter, the present invention will be described in detail with reference to an embodiment of the present invention. FIG. 1 is an elevator hall entrance / exit device showing an example of a two-door, center-opening door system.
The figure is a longitudinal sectional view, and FIG. 3 is a plan sectional view. In the figure, reference numerals 1 and 2 denote left and right doors of the landing, each having a lower end guided by a door shoe 3 sliding on the premises of a sill 4 fixed to a building floor 21 of the landing by a bracket 5 or the like, and an upper end being a wall of the landing. The header 9 fixed to the bracket 22 by a bracket 15 is suspended by a hanger 6 that rolls and runs on a door rail 8 and opens and closes left and right in the figure. The left and right doors 1 and 2 are in a closed state, and 7 is a door interlock hook fixed to the left and right doors 1 and 2, which is engaged with a header 9 or a lock fitting 10 fixed to a door rail 8 to lock the door. I have. (Since the interlock device is not directly related to the present invention, it is shown in a simplified diagram, but the left and right doors 1 and 2 are mechanically and electrically locked in this state. FIG. 4 is a detailed view showing an example of the lower end portion of the door according to the present invention, FIG. 5 is a plan view showing a sill portion, and FIG. It is a longitudinal cross-sectional view. In the drawing, reference numeral 13 denotes a hanging hole that penetrates the sill 4 and the bracket 5 in the vertical direction, and 11 denotes a pin that is fixed to the lower end of the left and right doors 1 and 2 by protruding downward and is inserted into the hanging hole 13. It has a size that engages, and its lower end is inclined. The pin 12 is normally located in the guide groove of the sill 4 and the gap g between the pin 12 and the groove bottom is larger than the gap between the lower ends of the doors 1 and 2 and the upper surface of the sill 4 as shown in FIG. It is desirable to be installed small and minimal. When the left and right doors 1 and 2 are fired near the landing entrance and exit and are heated, they rapidly deform to the front side as shown in FIGS. 2 and 3 (they bulge and deform to the arrow side). This is because the front side is heated and the back side on the hoistway side is air-cooled, so that it is convexly deformed to the front side due to the temperature difference.
Expands due to thermal expansion. However, since the left and right doors 1 and 2 are restrained by the hanger 6 at the upper part and the shoe 3 by the guide groove of the sill 4 at the lower part,
Next, the convex deformation is advanced. Therefore, the left and right doors 1 and 2 protrude toward the landing as shown by the two-dot chain line in FIG. The left and right doors 1 and 2 have hooks 7 at the upper end of the door interlock device.
Is hooked on the lock fitting 10, and the movement in the door opening direction is restricted, but if the lower part is not restricted, FIG.
As shown by the two-dot chain line in FIG. 2, the left and right doors 1 and 2 are deformed and advanced to the convex side of the surface, and move to the lower side or in the left and right direction, and a door stop gap G is generated and expands with time. I will do it. However, at this time, according to the present embodiment, the left and right doors 1, 2
At the time of the initial extension, as shown by the two-dot chain line in FIGS. 4 to 6, the pin 11 moves downward, enters the engaging hole, and stops the left and right doors 1 and 2 from moving in the left and right directions. Prevent the door stop opening from widening.

〔The invention's effect〕

ADVANTAGE OF THE INVENTION According to this invention, since the lateral deformation of the door by heating at the time of fire can be suppressed, the safe elevator hall entrance / exit apparatus which does not have a large door opening can be provided.

[Brief description of the drawings]

FIG. 1 is a rear elevational view of an elevator hall entrance / exit device showing one embodiment of the present invention, FIG. 2 is a longitudinal sectional view of FIG.
The figure is a plan sectional view of the same. FIG. 4 is a partial side view showing an example of the lower end of the door, FIG. 5 is a sectional view showing the sill, and FIG. 6 is a longitudinal sectional view of the same. 1,2 ... Left and right doors, 4 ... Sill, 11 ... Pin, 13 ... Hanging hole.

Claims (2)

(57) [Claims] 1. An elevator landing doorway device having a landing door whose upper part is suspended by a door rail and whose lower part is horizontally opened and closed with a door shoe guided in a groove of a sill, wherein a door stop side of the landing door. A downwardly projecting pin is fixed to the lower end, and a locking hole large enough to engage the pin is provided at a groove bottom of the sill opposite to the pin when the landing door is closed, and An elevator hall entrance / exit device, wherein a gap between a floor of a sill and a groove is set smaller than a gap between a lower end of the hall door and an upper surface of the sill. 2. An elevator hall entrance / exit device according to claim 1, wherein said pin is provided with a slope on a tip end side thereof.