| 摘要 |
PROBLEM TO BE SOLVED: To perform sound fastening without causing failure fastening, while improving fastening torque, by realizing a fastening structure press-fitted to a reentrant part forming surface by pushing a lower end edge part of a tip plate thickness surface of a dished lip in a lower reentrant part of a root surface between upper-lower male threads of a screw. SOLUTION: This screw fastening structure in a thin metal plate has a structure press-fitted to the reentrant part forming surface by pushing the lower end edge part 21" of the tip plate thickness surface 21' in the reentrant part 17' formed of the root surface 18 between the upper-lower male threads 14 and an upper side surface 16 of the lower male thread 14, when screwing the screw 10 in a prepared hole 19, by forming the tip plate thickness surface 21' as an inclined face having a biting angle toward the lower edge part 21" of a parallel surface or the plate thickness surface 21' to the axis X of the prepared hole 19, while capturing the tip plate thickness part between the upper-lower male threads 14 of the screw 10, by screwing the screw 10 in the prepared hole 19 defined by the tip plate thickness surface 21' of the dished lip 21 formed on the thin metal plate 20. COPYRIGHT: (C)2007,JPO&INPIT
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