| 摘要 |
<P>PROBLEM TO BE SOLVED: To enable a large and heavy shutter to be smoothly opened/closed by a small force. <P>SOLUTION: This shutter mechanism includes a shutter supply/storage mechanism for delivering the shutter toward an opening part and pulling it out of the opening part. It further includes a lifting body supported in a liftable manner by a shutter guide mechanism and linked with the front end of the shutter, and a balancing mechanism for energizing the lifting body in the rising direction. The balancing mechanism consists of a pair of vertical springs vertically disposed on both sides of the opening part to be located in front of and behind the moving passage of the front end of the shutter, and having lower ends formed of tensile type coil springs held on the floor surface part sides, movable pulleys mounted on the upper end sides of the vertical springs, fixed pulleys located above the vertical springs and mounted on the exclosure structure sides, and string members each having one end connected to one string member mounting part of the lifting body, an intermediate applied onto the corresponding fixed pulley and movable pulley, and the other end mounted on the enclosure structure side above the corresponding movable pulley. <P>COPYRIGHT: (C)2012,JPO&INPIT |
