| 摘要 |
PROBLEM TO BE SOLVED: To prevent removal of a security lattice door from the outside by arranging a latch lock functioning similarly to that fixed to a window glass pane to the central position in which lattice edge frames of a pair of security lattice doors overlap to each other and arranging a vertical type lock in the end of the lattice edge frame lower position on the left of one side of the security lattice door. SOLUTION: A pair of security lattice doors 1 is fitted in rails 11 arranged in the upper and lower parts of a window frame 6 so as to be installed to a window frame 6 with a window glass pane 7. A latch lock 5 functioning equally to one fixed to the glass pane 7 and rotating for locking/unlocking is arranged in the central position in which lattice edge frames 3 of a pair of security lattice doors 1 overlap mutually, and the lock 5 fixes and maintains the security lattice door 1 when it is closed. In addition, locks 4 moving upward/ downward for locking/unlocking are arranged in the upper and lower parts of the right side lattice edge frame 3 and in the lower part of the left side lattice edge frame 3 in the pair of security lattice doors 1. In this way, the security lattice door can be fixed to the window frame so as not to be removed from the outside.
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