ELEVATOR LANDING DOOR SYSTEM HAVING FIRE PROTECTION DEVICE

ELEVATOR LANDING DOOR SYSTEM HAVING FIRE PROTECTION DEVICE

The present invention pertains to an elevator landing door system having a fire prevention device that prevents flame or smoke from penetrating into a shaft from a landing and being spread throughout the entire building by blocking the gap between door panels when a fire breaks out in a building. The elevator landing door system having a fire prevention device consists of door panels that are opened and closed; a fire prevention plate that extends alongside the opening and closing edge surface (b) of one door panel on the side facing the elevator, equipped with a downward slot inclined toward the opening and closing edge of the door panel, and fixed to the door panel by a fastening means penetrating through the slot; and fixtures made of a fusible material that are tightly attached together with the door panel and the fire prevention plate by the fastening means. The fixtures are arranged between the door panel and the fire prevention plate or between the fire prevention plate and the fastening means and are made of plastic or lead.

An elevator landing door system having a fire prevention device, characterized in that it consists of two door panels that are opened and closed; a fire prevention plate extends alongside an opening and closing edge surface (lib) of one door panel on the side facing the elevator, said plate including a downward slot inclined toward the opening and closing edge of the door panel, and fixed to the door panel by a fastening means penetrating through the slot; and fixtures made of a fusible material, said fixtures tightly attached together with the door panel and the fire prevention plate by the fastening means.

Description:ELEVATOR LANDING DOOR SYSTEM HAVING FIRE PROTECTION DEVICE TECHNICAL FIELD OF THE INVENTION The present invention pertains to an elevator landing door. More specifically, the present invention pertains to an elevator landing door having a device that prevents the flame or smoke from penetrating into a shaft through the gap between landing door panels.

In general, a landing door is an entrance to an elevator car that is installed at an elevator landing on each floor in a building. The landing door is usually closed, and blocks the opening between the landing side and the shaft side where the elevator car ascends and descends, and is opened and closed by interlocking with a car door when the elevator car arrives.

Figures and are a rear view and a vertical section showing a conventional elevator landing door, and Figure is a horizontal section showing a state in which the conventional elevator landing door has been deformed by heat. In Figure , the left side of landing door is a landing , and the right side is a shaft .

A pocket is formed in an upper wall of the landing entrance, and a rail is installed in the pocket .

A hanger is installed at the top of a pair of door panels , that are symmetrically arranged on the left and right, and a hanger roller that is guided by the rail is mounted on the hanger . While the hanger roller . rolls along the rail , the door panels , slide to the left and right sides and open and close.

A sill is installed in floor of the landing and a guide shoe sliding along a guide groove provided in the sill is mounted at the bottom of the door panels , .

However, if the conventional elevator landing door is heated by a fire in a building, the door panels , may begin to deform, and eventually a gap may open between the door panels , as shown in Figure . Flame or smoke penetrates through the gap from the landing into the shaft , and the shaft may then act as a chimney so that the flame or smoke spreads to other floors of the building, thereby further increasing damage from the fire. http://www.oss-elevator-parts.com/