| 摘要 |
<p>A safety device is shown having a shield (23) shielding a danger region of the machine, said shield activating the machine when it is put in its closed position, whereas the machine is provided with means for opening (27, 26 and 25) the shield, when the machine is at such a point of its working cycle that no danger exists in the danger region. Preferably a yielding one-way clutch (29) is present between a moving part of the machine and the device for restoring the shield in its open position.</p> |
