| 摘要 |
The device comprises for each frame (1) a holding member (5) fixed at the front cover (2), which holding member has an aperture that is defined by clamping surfaces of a supporting plate (8) to be fixed at the front cover (2) and a pressure plate (6) connected therewith by means of a clamping screw (7), and whose width can be adjusted by the clamping screw (7) bridging the same, in which aperture the end of the frame (1) can be inserted by means of a lead-in slit (16) for the clamping screw extending therefrom. The lead-in slit (16) of the frame (1) constitutes a connecting link guide for an adapter (14) comprising the female thread for the clamping screw (7) and protruding from the pressure plate (6), and the end of the adapter (14) protrudes into the correspondingly increased lead-in aperture (12) for the clamping screw in the supporting plate (8), where the clamping screw (7) is supported with its head or a washer (18) on the supporting plate (8) outside the edge of the aperture.
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