| 摘要 |
PROBLEM TO BE SOLVED: To provide a crime preventive device capable of fixing a closed sliding door of a sash window, a sash door, or the like unopenable from the outside and easily releasing the fixture in a single operation without needing complicated operation and moreover usable almost invisible from the outside. SOLUTION: Two sash doors are simultaneously fixed by a plate-like prop 10 having a protrusion 11. Either door is set unopenable from the outside only by fitting the prop 10 in a rail groove of the sash door, and can be released only by pulling out the prop 10. Since the prop 10 is invisible from the outside except one side face of the protrusion 11, it is extremely hard to notice its presence. COPYRIGHT: (C)2006,JPO&NCIPI
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