Patent ID: 7029392

Claim:
A device for adjusting the width of a sieve mesh on a combine harvester for at least one sieve arranged in a cleaning unit of the harvester, where the sieve is fixed in a sieve box of the cleaning unit so that the sieve can be released and removed from the sieve box, louvers of the sieve are attached to twistable louver wires, in kinks of which said louver wires an adjusting rail is suspended, the adjusting rail being connected with an adjusting mechanism via a transverse shaft, the device comprising: the transverse shaft and the adjusting mechanism being arranged at a fixed position on the sieve box; and an upwards directed driver attached to an end of the transverse shaft such that the driver cannot twist relative to said transverse shaft, the end of the transverse shaft being carried in a region of a longitudinal central plane of the sieve box in a bearing plate, and an opposite end of the transverse shaft being carried in a region of a longitudinal spar of the sieve box, where the transverse shaft is coupled with the adjusting mechanism, the transverse shaft being located beneath the sieve, the driver being further connected with the adjusting rail via an engagement which is released by an upwards movement of the sieve, and wherein an upper part of the bearing plate is formed as a rectangle, which engages with a downwards opening notch in a longitudinal rib of the sieve, a gap being provided between the upper part of the bearing plate and a portion of the rib defining an upper end of the notch.