The clamping bracket consists of a steel wire which is bent essentially at right angles and whose one branch (3) is bent back by approximately 180 DEG to the other branch (4) and engages over the latter with its end bent to form a hook (1). The end (5) of the second branch (4) is bent back by 180 DEG and projects from the plane defined by the two branches (3, 4) in the same manner as the hook (1). <IMAGE>