A new fire escape shaft

The present invention relates to a novel hoistway emergency ladder, comprising ladder, provided at the bottom of the ladder fixed frame, and the safety gear frame is provided at the top of the ladder is fixed to the fixed frame in the inside of the support bar, fixed to the frame of the "protrusion lower end opening "font, said fixing frame comprising a U-shaped frame and the upper portion of the card opposed to said U-shaped frame box is connected, the U-shaped frame and two side beams of the ladder are connected by a flexible shaft, the card setting frame lateral dimension greater than the diameter of the wellhead; end of the support bar and the U-shaped frame be connected by a flexible shaft, the movable end of the through hole of the support bar, the side members of the ladder is provided with through holes corresponding to the positioning holes provided, the said through-hole and the positioning hole is connected by a pin; said safety gear frame connected to the two ends are respectively fixed to side members of the ladder. The present invention is simple in structure, easy to use, can improve the safety and convenience of construction workers during construction of the well shaft.