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1. (WO2017150210) CAULKING BOLT

Pub. No.:    WO/2017/150210    International Application No.:    PCT/JP2017/005846
Publication Date: Sat Sep 09 01:59:59 CEST 2017 International Filing Date: Sat Feb 18 00:59:59 CET 2017
IPC: F16B 37/06
Applicants: AOYAMA SEISAKUSHO CO., LTD.
Inventors: HOSHINO Naoki
OHTA Toshiya
YOSHIDA Mitsuki
FUKUCHI Tomoyuki
MATSUNAMI Shigeki
FUJIMOTO Yukinori
OMURA Jun
Title: CAULKING BOLT
Abstract:
There is provided a caulking bolt which can be fastened by a general nut even when used to fix thin plates to each other, and which can also provide fitting strength similar to that of conventional products. The caulking bolt includes a head part 11 and a shaft part 12, and has a non-circular, flat, rotation preventive protrusion 14 formed on a seat surface 13 of the head part. Also, the upper end of a normal complete thread part 17 formed in the shaft part 12 is brought close to the seat surface 13 of the head part with a distance of 3 pitches or less, and an incomplete thread part 18 formed at the portion of 3 pitches or less is used as a stopper part into which a metal flows when the caulking bolt is driven into a metal plate.