Fireproof shaft door for elevators

Details Fireproof shaft door for elevators Fireproof shaft door for elevators

1992-12-23

1994-03-15

Dayoan, D. Glenn

Elevator, industrial lift truck, or stationary lift for vehicle

Stationary lift for roadway vehicle or required component...

Having specific drive means for support

52 30, 49120, B66B 900

Patent

active

052939626

ABSTRACT:
A fireproof shaft door for an elevator installation has an improved heat insulation towards the shaft side in the case of a fire at the floor side of the door. A door is filled with heat insulating spaces and heat insulating mat and is positioned at the floor side of a framework which is carried by a door suspension. The framework is horizontally displaceable on a roller and is guided at a lower edge by a sliding guide engaging a recess in a threshold. Horizontal spars, which are provided with ventilation apertures, are attached to the door box at the shaft side. Heat insulating plates are attached to the spares to cover the shaft side of the framework. A first hollow space is formed between the door box and the heat insulating plates and functions as natural chimney in which fresh air circulates. A vertically extending recess is formed in a closing edge of the door box to form a second hollow space in which fresh air circulates when the door is closed.

REFERENCES:
patent: 3631942 (1972-01-01), Brounn
patent: 4530189 (1985-07-01), Randall
patent: 4700809 (1987-10-01), Lazar
patent: 5156237 (1992-10-01), Hayashi et al.

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