| 摘要 |
PROBLEM TO BE SOLVED: To secure latching of a latch lock for a free door, at a closed position. SOLUTION: A reversing latch, a locking piece to be engaged/disengaged from the reversing latch, a press means for the locking piece for always urging the tip end portion of the locking piece in the direction to be engaged with the rear end portion of the reversing latch, a trigger member equipped with a movable locking means for restricting the press means from moving in the disengaging direction, and an engaging action constituent member to be worked with the operation force of an operation member for operating the locking piece in the disengaging direction, respectively provided in a key box. When the operation member is operated during the movement of the door from an opened state to a closed state, the locking piece is slightly worked in the disengaging direction via the engaging action structural member. However, the pressing piece of the press means remains held between the tip end portion side of the locking piece and the movable locking means, allowing the locking piece to maintain the engagement state with the reversing latch. COPYRIGHT: (C)2009,JPO&INPIT
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