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Patent Searching and Data


Title:
DOUBLE-SCREW STRUCTURE
Document Type and Number:
WIPO Patent Application WO/2016/194842
Kind Code:
A1
Abstract:
This double-screw structure 1 has a loosening prevention function, has a first screw (S1) and a second screw (S2) formed on a double-screw section and having different leads, and the strength of the screw section is adequate. This screw section is configured from a first screw (S1), which comprises a coarse thread screw having a standard pitch P, and a special second screw (S2). The second screw (S2) is formed continuously on the screw thread of the first screw (S1). A cross section of the screw groove has the same or substantially the same shape and the same screwing direction as that of the first screw (S1), and has a lead (L = n*p) that is a prescribed multiple n of the standard pitch P, and the second screw is a screw that has one or more fewer threads than a multi-threaded screw having a triangular cross-sectional shape.

Inventors:
SHINBUTSU, Toshinaka (2022, Torisawa, Tomihama-machi, Ohtsuki-sh, Yamanashi 02, 〒4090502, JP)
TAKEMASU, Teruie (Nakazawa rent house B, 2556-1 Toyoda, Suwa-sh, Nagano 16, 〒3920016, JP)
AMANO, Shuichi (2022, Torisawa, Tomihama-machi, Ohtsuki-sh, Yamanashi 02, 〒4090502, JP)
Application Number:
JP2016/065793
Publication Date:
December 08, 2016
Filing Date:
May 27, 2016
Export Citation:
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Assignee:
FORM ROLL TECH CO., LTD. (2022, Torisawa Tomihama-machi, Ohtsuki-sh, Yamanashi 02, 〒4090502, JP)
International Classes:
F16B39/30; B21H3/06; B21H3/12; F16B33/02; F16B35/00; F16H25/20; F16H25/24
Foreign References:
JPH07103221A1995-04-18
EP1167781A12002-01-02
Attorney, Agent or Firm:
TOMISAKI Motonari et al. (2nd Floor, Toranomon-yoshiara Bldg. 6-13, Nishishimbashi 1-chome, Minato-k, Tokyo 03, 〒1050003, JP)
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