Adjustment portal, shrinking device with adjustable shaft walls and method for adjusting shaft walls

摘要

The portal (1) has a contraction tunnel for adjusting shaft walls, which are adjustable relative to each other in a relative position. The shaft walls of the contraction tunnel are arranged at a setting device (40). An adjusting device is variably positioned along an adjusting track. The adjusting device is selectively associated to the setting device and brought into active connection with the setting device. The setting device is newly positioned during active connection with an adjusting unit of the adjusting device. Independent claims are also included for the following: (1) a contraction device (2) a method for adjusting two shaft walls of a contraction tunnel of a contraction device.