| 摘要 |
PROBLEM TO BE SOLVED: To improve workability in installing a plurality of parts of different thickness using screws of the same length by equalizing biting length of the screws to the respective parts. SOLUTION: Bosses 14 and 15 are provided in a single mounting base for screwing of tapping screws 13, and prepared holes 16 and 17 are respectively formed in the bosses 14 and 15. In screwing parts 11 and 12 of different thickness to the bosses 14 and 15 using the tapping screws 13 of the same length, a large diameter part 18 of the similar or larger diameter to the ridge diameter of the tapping screw 13 is formed on the opening part side of the prepared hole 16 in the boss 14, and its length A is set shorter when the part 11 to be installed on the boss 14 is thicker, and longer when it is thinner. The length of the large diameter part 18 is set at 0 for the boss 15 to which the thickest part 12 is installed. COPYRIGHT: (C)2005,JPO&NCIPI
|
