Fireproof shaft door for elevators

A fireproof shaft door for an elevator installation, the shaft door being positioned at a floor in a shaft door opening in a wall of the shaft, the shaft door being suspended by a door suspension attached to a roller guided in a roller guide attached to the shaft wall, the shaft door being horizontally displaceable by movement of the roller along the roller guide, a lower edge of the shaft door being attached to and guided by a sliding guide in a threshold of the shaft door opening, comprising:

• a framework having a floor side and a shaft side;
• a door box positioned at said floor side of said framework and having an interior with a plurality of heat insulating spaces and heat insulating mats therein;
• a plurality of spars attached to said door box at said shaft side of said framework;
• a plurality of heat insulating plates attached to said spars at said shaft side of said framework whereby said heat insulating plates are spaced from and cooperate with said door box to form a first hollow space therebetween in which fresh air can circulate;
• and
• wherein said door box has a vertically extending closing edge and including a vertically extending recess formed in said closing edge to form a second hollow space for circulating fresh air when the fireproof shaft door is in a closed position in the shaft door opening.

A fireproof shaft door for an elevator installation, the shaft door being positioned at a floor in a shaft door opening in a wall of the shaft, the shaft door being suspended by a door suspension attached to a roller guide attached to the shaft wall, the shaft door being horizontally displaceable by movement of the roller along the roller guide, a lower edge of the shaft door being attached to and guided by a sliding guide in a threshold of the shaft door opening, comprising:

• a framework having a floor side and a shaft side;
• a door box positioned at said floor side of said frame work and having an interior filled with a first heat insulating space, a first heat insulating mat, a second heat insulating space and a second heat insulating mat in a layer sequence beginning at said floor side of said framework;
• a plurality of spars attached to said door box at said shaft side framework;
• a plurality of heat insulating plates attached to said spars at said shaft side of said framework whereby said heat insulating plates are spaced from and cooperate with said door box to form a first hollow space therebetween in which fresh air can circulate;
• and
• wherein said door box has a vertically extending closing edge and including a vertically extending recess formed in said closing edge to form a second hollow space for circulating fresh air when the fireproof shaft door is in a closed position in the shaft door opening.