(57) Roll-up door comprising two door-leaves (4) arranged to be wound onto and off a common
roll-up roller (14). The door-leaves (4) are kept spaced apart by a roller (16) and
a rigid profile member (6) at the lower ends of the doorleaves where the latter are
interconnected.
The rigid member (6) is guided by carriages (8) which are rotatably mounted atthe
member ends and travel in U-beams (10). Belts (22) are secured to the carriages (8)
and are carried about a number of pulleys (24,26,28,30,34) and are wound onto and
off discs (36) which are mounted on the same shaft (38) asthe roller (14) onto which
the door-leaves (4) are wound on and off, whereby the door-leaves (4) will be maintained
tensioned and their weight balanced.
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