Roller bolt for door closure with closure plate fits insert in plate opening to form trough framed by sloping edges bearing on plate to hold incoming bolt when door closes.

摘要

An insert (5) in the closure plate (1) opening (4) forms a trough (10) to support the roller bolt (6), the trough being concave-based or forming a vee-shape. The trough rim bearing on the plate (1) slopes down (K) towards the plate front face (9). Thus the concave base (B) forms an edge leg (S) with the wedge part (K). The trough (10) forms part of a cylinder with axis (A) being parallel to the bolt (6) axis (RA) and with cylinder diameter (D) at least equal to the bolt (6) diameter (D1). Edge (8) preferably runs right round the trough area similar to a frame.