| 摘要 |
PURPOSE:To provide an operating mechanism for use in opening/closing device, with which a high deceleration is obtained and which remains at a standstill even though torque is applied from the output shaft side. CONSTITUTION:Pulleys 8a, 8b are installed on a frame 1 rotatably, and a disc 4 which is fitted with an output shaft 3 and provided at the periphery with grooves 4a, 4b is mounted on the frame 1 rotatably. A cylinder 9 provided with slit grooves 10 in straight form is secured to the frame 1, and another pulley 7 is installed rotatably at the bottom of the cylinder 9. An elevating/ sinking body 12 is furnished whose central part is engaged by an input screw rod 14 to be rotated by a motor 11 and is fitted at two ends with rollers 13 which are to be fitted in the slit grooves 10. A cable 16a is laid which is fitted in the groove 4a and whose one end is secured in this groove 4a while other end is fixed to the elevating/sinking body 12 through the pulley 8a. Another cable 16b is laid which is fitted in the other groove 4b in the disc 4 and whose one end is secured in this groove 4b while other end is fixed to the elevating/ sinking body 12 through the pulleys 8b and 7. |
