Thin-strip coiler comprising a flatness measuring roll

The invention relates to a method and device for measuring and influencing the strip flatness in the coiler shaft of a hot-strip mill, whereby the coiler shaft has, between a driver and a coiler, moving and stationary strip guides as well as a flatness measuring roll ( 13 ). The hot strip ( 1 ) is supplied via the coiler shaft to a coiler, which is provided with a coiler mandrel ( 5 ), pressure rolls ( 6 ) and with deflecting shells ( 7 ), over a roller table ( 2 ) and the driving rolls ( 3, 4 ) of the driver. The flatness measuring roll ( 13 ) is displaced out of a working position, in which the hot strip is guided around the flatness measuring roll ( 13 ) while maintaining an approximately constant contact angle alpha, and into a lowered position. In addition, a strip guide ( 14 ), which can swivel inward and protects the flatness measuring roll ( 13 ), is placed inside the coiler shaft.