| 摘要 |
A respective support is arranged at each side at the underside of an escalator step, wherein a first fastening is provided at the upper support end for a transport chain and a second fastening (6) is provided at the lower support end for a guide roller. The second fastening (6) consists of a cantilever arm (7) and a bearing pin (8) with a bore (9), which are integrated components of the escalator step, wherein escalator step, cantilever arm (7), bearing pin (8) and bore (9) are produced in one casting. Neither the bearing pin (8) nor the bore (9) has to be subsequently processed. The bearing (11) can be pushed onto the bearing pin (8). In order to save the working process of thread-cutting, a countersunk self-tapping screw (13) is used for fixing the bearing (11). The countersunk self-tapping screw (13) plastically forms an exact internal thread in the bore (9). On tightening of the screw (13), a washer (14) lying under the screw (13) presses on an inner ring (12) of the bearing (11), whereby the bearing (11) is exactly positioned against a shoulder (10) and held by the washer (14). |
