Swivel Seat System - Access Flow2A Manual

15
The chair
3.2

Swivel seat system

The stairlift can be fitted with a fixed chair, a manual swivel seat or a powered swivel seat.
Fixed chair
With a fixed chair the chair is attached to the drive unit. To make it easier to step on and off, it is convenient if the
seat is turned at the bottom and the top. In that case a manual swivel seat can be fitted. If the user also wants to
turn to a comfortable position while moving, or a small stairwell makes it necessary, a powered swivel seat must be
fitted.
Figure 3-4: Fixed chair Figure 3-5: Manual swivel seat system
Manual swivel seat
With the manual swivel seat mechanism the chair frame is connected to the drive unit via an arm. The chair frame
can pivot 70⁰ around the arm by lifting one of levers on either side of the chair frame. At the end positions the chair
can be locked in place by lowering the lever again.
The direction of rotation is dependent on the position at which the chair must rotate. This cannot be changed.
The manually operated swivel seat is fitted at the top as standard to make stepping on and off easier. In this case at
the bottom the chair may only turn the "wrong" way (towards the stairs).
If the swivel has to be fitted at the bottom, a runout must be positioned at the top to avoid the need to run the chair
over the stairwell at the top. At the bottom the rail may not be steeper than 60⁰ because otherwise the chair frame
will strike the rail while turning.
Powered swivel seat
When a stairlift is fitted with a powered swivel seat mechanism, an electric motor (Figure 3-6) drives the vertical
support of the chair mounting through a planetary gear system.
Figure 3-6: Swivel motor