| 摘要 |
The device possesses a plurality of program control discs (1, 2, 3) which actuate electric switches (8) and are arranged on a control shaft (6) rotated by a roll adjustment motor (9). It also has an extreme-gap control disc (4), which is provided with two cams (46) for controlling the two extreme positions of the roll gap (24). There is also an end-gap control disc (5) which is arranged for limited rotation relative to the program control discs (1, 2, 3) on the control shaft (6), the program control discs (1, 2, 3) are located for limited rotation on the control shaft (6) relative to the extreme-gap control disc (4) and are taken along by the extreme-gap control disc (4) or the control shaft (6) by means of a slip clutch (25) whose holding force is greater than that of the friction clutch (37) taking along the end-gap control disc (5). <IMAGE>
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