| 摘要 |
PROBLEM TO BE SOLVED: To provide a wall-mounting screw fitting easily mounted and firmly fixable to a gypsum board without leaving a large opening after removed. SOLUTION: A hook part 15 is held to screw a screw coil part 13 with a metal bar body bent in spiral shape, into the gypsum board B. When the screw coil part 13 is completely screwed into the gypsum board B, a washer 16 is pressed to the surface of the gypsum board B by a collar part 14. The washer 16 is deformed into flat shape being pressed by the collar part 14 to generate spring force of pushing the gypsum board B. The screw coil part 13 is thereby fixed to apply force to the gypsum board B and prevented from falling from the gypsum board or getting loose. Only a hole approximately equivalent to the diameter of the metal bar body 12 is bored in the gypsum board B, and when removing the wall-mounting screw fitting 11 from the gypsum board B afterwards, only a small hole is left, and a removal mark is not conspicuous. COPYRIGHT: (C)2007,JPO&INPIT
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