Moving staircase with a curved conveyor passage

B - Operations – Transporting – 66 – B

Patent

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198/2

B66B 21/02 (2006.01) B66B 23/14 (2006.01)

Patent

CA 1203193

ABSTRACT OF THE DISCLOSURE A moving staircase having an arcuate conveyor passage in plan view is disclosed in which the tread boards articulated in an endless fashion along the arcuate conveyor passage are each rotatably provided with a tread board axle in the widthwise direction, the tread board axle rotatably mounting outer and inner drive rollers near its outer and inner ends, respectively, and these outer and inner drive rollers are adapted to be supported on and guided by the outer and inner rails, respectively, secured to the main frame. The outer and/or inner drive rollers are prevented from derailing from the outer and/or inner drive rails by presser rails secured to the main frame, and side rollers mounted to the tread board axles to resist the radially inward force applied to the tread boards in operation are adapted to abut against the side surfaces of the outer and/or inner drive rails and the presser rails. The side rollers are also prevented from derailing from the corresponding rail surfaces due to the prevention of the derailing of the drive rollers by the presser rails.

463392

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