| 摘要 |
PROBLEM TO BE SOLVED: To propose a hook lock not hindering operation of a hook piece by freezing of water even in a cold district, as a waterproof structure for surely preventing flooding of a storage part of the hook piece.SOLUTION: A dead bolt 31 retractable from a lock surface 34 of a door is provided with a bottom surface-opened storage part 42 formed of a ceiling surface 42a and left-right side surfaces 42b and 42c. The ceiling surface 42a of the storage part 42 is formed with a first window hole 42d provided in its tip side part and a second window hole 42e provided in its rear end side part. A hook piece 41 is pivotally supported by a device case 33, and its hook-shaped projection part 41a is freely projected from the first window hole 42d, its driving arm part 41b is freely projected from the second window hole 42e, respectively, and its projection part 41a is rotated to a locking position from an unlocked position by driving the driving arm part 41b of the hook piece 41 by interlocking with the movement to a locking position of the dead bolt 31. |
