| 摘要 |
<P>PROBLEM TO BE SOLVED: To facilitate screwing work of a screw by easily position the screw on a fastening hole with a simple and compact structure. <P>SOLUTION: In a guiding portion 20 of a main mounting tool 10, a guiding groove portion 15 is formed at a lateral direction center of a bottom surface 12. Width B between side walls becomes narrower toward a downstream side. Ceiling height Hex is decreased toward the downstream side, and becomes the minimum ceiling height Hex2 at an outlet position. Width Bin 1 between the side walls is sufficiently larger than the full length nL of a screw 24, and width Bex2 between the side walls is smaller than the full length nL and larger than the maximum external shape hD of a head portion 25 of the screw 24. Ceiling height Hex2 is smaller than the maximum external shape hD and larger than the thickness hL of the head portion 25. The groove width mB of the guiding groove portion 15 is smaller than the maximum external shape hD, and larger than the maximum external shape nD of a shaft portion 26 of the screw 24. The depth dp of the guiding groove portion 15 is deeper than length Ls under its head portion of the screw 24. <P>COPYRIGHT: (C)2009,JPO&INPIT |
