| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a screw operating device having a function capable of automatically stopping the driving function with a screw in the case of exceeding specific conditions by cooperation work with a driving shaft incorporated into the axial center of the screw by using a screw having a large lead. <P>SOLUTION: The screw operating device has a driving shaft 6 rotated and driven by a speed setting driving machine 4, the screw 7 having a large lead, which is fitted to the driving shaft 6 and is turned and driven by it and supported being able to be moved in the axial direction, two pairs of coil springs 14 imparting a thrust on both sides of the screw 7 under a balanced state so that one ends are fixed and held to the driving shaft 6 and the other ends are abutted on the screw side and a moving body (a door 30) with a plurality of power transmission rollers 25 propelled and moved in contact with the groove 7a section of the screw 7 and a guidance in parallel with the axis of the screw 7. <P>COPYRIGHT: (C)2004,JPO |
