SCREW FASTENING STRUCTURE

WIPO Patent Application WO/2021/065024

A1

[Problem] To provide a screw fastening structure for preventing, even in a heat environment, loosening of a fastening body or a fastened body that are formed of a thermoplastic resin, the screw fastening structure also enabling reduction in weight. [Solution] A screw fastening structure comprises: a fastening body (20) with a bottomed hole (21) drilled therein; a fastened body (30) with a through-hole (31) drilled therein; and a tapping screw (10) comprising a head portion (11) and a screw shaft portion (12), the screw shaft portion (12) of the tapping screw (10) being inserted through the bottomed hole (21) in the fastening body (20) and the through-hole (31) in the fastened body (30) and being screwed in both the bottomed hole (21) and the through-hole (31) so as to fix the fastened body (30) to the fastening body (20), in which an overall length (T1) of a small-diameter screw portion (13) is larger than a thickness (t2) of the fastened body, and an overall length (T2) of a large-diameter screw portion (14) is smaller than the thickness (t2) of the fastened body.

JP2003042121	WOOD SCREW
JP5770399	Self-tap screw and its manufacturing method
JPH0861343	SCREW, FITTING THEREOF SUCH AS SASH AND DOOR, AND FITTING FRAME FOR THIS FITTING

TORII SHINGO (JP)
MIYATA KEIICHI (JP)

PCT/JP2019/051375

April 08, 2021

December 27, 2019

Click for automatic bibliography generation  

NITTO SEIKO KK (JP)

F16B25/04; F16B5/02

JP2018112292A	2018-07-19
JPH10311317A	1998-11-24
JPH0719604U	1995-04-07
JP2019113111A	2019-07-11

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