| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a muffler structure exhibiting a sufficient sliding effect when a shutter curtain slides in a guide rail, and preventing wind noise from being generated between the guide rail and the shutter curtain when the shutter curtain flaps due to wind or the like.SOLUTION: A muffler structure of a shutter curtain 2 is configured in such a manner that a holding plate 5 is in a slide groove of a guide rail 1 and disposed at a position located between the guide rail 1 and the shutter curtain 2, a bearing bar 7 penetrating through the guide rail 1 is mounted to the holding plate 5, a magnet 8 is fixed at a tip of the bearing bar 7, and magnets 13, 14 of the same and different polarity fixed to a drive shaft 12 provided on the outside of the guide rail 1 move to a position opposite to the magnet 8. The holding plate 5 presses and opens the shutter curtain 2 between it and the guide rail 1 by a repulsive force of the magnets when the magnet 13 having the same polarity as that of the magnet 8 mounted to the holding plate 5 comes to the opposite position, and by an attraction force of the magnets when the magnet 14 having different polarity comes to the opposite position.</p> |
