To lock and unlock repeatedly in turn by a key used for a lock device, without feeding coins or imitated coins for ispection into a coin slot.
This lock device is provided with a movable piece exposed to the coin passage way at the front end thereof and pushed down by a coin and a release plate P, a side wall plate 80 forming a projection piece fixed or unfixed to the notch of the movable piece, and another side wall plate arranged opposite to the side face plate 80 to form the coin passage way with a distance nearly corresponding to the thickness of a coin. A gap 100 is formed at the rear part of respective side wall plates 80 and a notch is formed at the rear wall of a protection cover 30 to make it possible to insert the release plate P or remove it. And the movable piece can be pushed down by the release plate P.
KISHIMOTO RYOZO
OBARA MASAO
