| 摘要 |
PROBLEM TO BE SOLVED: To provide a hook structure superior in strength, while holding an advantage of a resin hook. SOLUTION: This hook structure is installed in an end part of a shutter curtain 4 formed by continuously arranging a plurality of slats 40 in the vertical direction. A resin hook 6 is installed in the end part of the shutter curtain 4 every other predetermined sheet. A crime preventive hook 7 having strength larger than the resin hook 6, is installed in an end part of at least a partial slat of the slats unattached with the resin hook 6. The resin hook 6 and the crime preventive hook 7 are formed in a shape and a dimension so that the resin hook 6 contacts with a locking object part 14 inside of a guide rail before the crime preventive hook. COPYRIGHT: (C)2006,JPO&NCIPI
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