Title:
MACHINE SCREW
Document Type and Number:
Japanese Patent JP2017057957
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a machine screw capable of assuring a requisite strength maintenance factor even if a structural plate is deteriorated.SOLUTION: A machine screw of this invention is a machine screw applied for a structural plate, and has a thread part having a thread ridge at its outer periphery. For, a difference of elevation and pitch of the thread ridge show values in a prescribed area in a diagram with the difference of elevation being set at x-axis [mm] and the pitch being set at y-axis [mm], the prescribed area is an area where the difference of elevation is 2.37 mm or more and the pitch is 3.17 mm or more. When it is defined to show [the difference of elevation, the pitch], the prescribed area is an area where the difference of elevation and the pitch become larger in their values than a line connecting (2.37, 3.70) and (2.77, 3.17).SELECTED DRAWING: Figure 2
Inventors:
NOGUCHI KOJI
ARASAKI MITSURU
ARASAKI MITSURU
Application Number:
JP2015184511A
Publication Date:
March 23, 2017
Filing Date:
September 17, 2015
Export Citation:
Assignee:
SOLAR FRONTIER KK
International Classes:
F16B25/04; F16B25/00; F16B25/10
Domestic Patent References:
| JP2005121224A | 2005-05-12 | |||
| JP2014119023A | 2014-06-30 | |||
| JPH03209006A | 1991-09-12 | |||
| JP2004244941A | 2004-09-02 | |||
| JP2000314414A | 2000-11-14 |
Attorney, Agent or Firm:
Tadashige Ito
Tadahiko Ito
Tadahiko Ito
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