| 摘要 |
PROBLEM TO BE SOLVED: To certainly and temporally perform opening/closing movement and positioning even by the use of a rotary drive source for the opening/closing movement of an opening/closing member, and to rapidly restore a position of the opening/closing member to a proper position even if an abnormal opening/closing movement occurs.SOLUTION: A blade member motor 272 performs opening/closing movement based on an opening instruction signal or a closing instruction signal on game specifications. A slit sensor 320 is invalidated from an opening instruction to a closing instruction based on the game specifications, validated in a time except that, and monitors a closing state in a normal game state. When a blade member 120 is opened by an external force or the like, a rotary shaft 120A rotates, and the position of a second cutout 316 of a positioning plate 310 is displaced so that drive in a direction to close the blade member 120 is instructed, and a closing position can be maintained. The maintenance of an opening position can be achieved by continuing the drive as shown in a dashed line. As shown in a slant line region of Fig.11, the opening position can be maintained by performing intermittent drive. |
