Opening/closing direction restriction mechanism for manual shutter device and opening/closing direction restriction mechanism for suspended sliding door

An opening/closing direction restriction mechanism for a suspended sliding device in which a suspended door suspended on a suspending rail substantially horizontally disposed and a liner which can run on the suspending rail is disposed on the suspended door, comprising:

• a base member fixed to an upper end of the sliding door, a two-way clutch is disposed on an opposing surface of the base member facing the suspending rail,
• a rack formed on the suspending rail and a pinion for the two-way clutch disposed on an input shaft of the two-way clutch are engageably disposed, wherein,
• the two-way clutch is disposed such that an opening inhibited state in which the pinion for the two-way clutch is allowed to be rotated depending on sliding of the suspended sliding door in a closing direction to prevent the pinion for the two-way clutch from being rotated depending on sliding of the suspended sliding door in an opening direction and a closing inhibited state in which the pinion for the two-way clutch is inhibited from being rotated depending on sliding of the suspended sliding door in the closing direction to allow the pinion for the two-way clutch to be rotated depending on sliding of the suspended sliding door in the opening direction can be switched.