Door closer or rotary leaf drive's closer spring clamping device, has support section and counter bearing effectively connected with output shaft so that rotation of shaft causes movements of section and bearing to or away from spring

摘要

The device has a support section (102a) and a counter bearing (104), which are provided to support a closer spring (103) with two ends, respectively, where one of the end is opposite to the other end. The section and the bearing are effectively connected with an output shaft (13) of a door closer or a rotary leaf drive (1) in such a manner that the rotation of the shaft causes movement of the section and the bearing on the closer spring to or away from the closer spring. A traction mechanism (106) has an end that is fixed to the support section and another end that is fixed to a hub.