| 摘要 |
A gate opening and closing apparatus for shifting a gate hingedly mounted on one of its sides so that an opposite side thereof can be moved to a closed position with respect to a stationary structure or to an open position with respect to this stationary structure. The apparatus comprises a shiftable member as for example, a plate which is mounted on the gate and is shiftable with respect to the side being hinged and the side thereof being located proximate the stationary member when in the closed position. A rod mechanism which is preferably comprised of a plurality of rods is operatively connected to a source of power, as for example, an electric motor, and this rod mechanism is also connected to the shiftable plate. When the motor is energized, the rod mechanism causes the gate to shift, either from an open position to a closed position, or otherwise, from a closed position to an open position. When the rod mechanism shifts the gate to the closed position a locking rod which is operatively connected to the shiftable plate is movable toward the stationary structure and engages a cooperating element so as to lock the gate when in the closed position. The locking rod is moved to the retracted or unlocked position just before the gate starts to move from the closed position to the open position.
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