Title:
FIXTURE AND VALVE ACTUATOR EQUIPPED WITH THE FIXTURE
Document Type and Number:
Japanese Patent JP2018112215
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a fixture suppressing the generation of a crack or breakage near a head portion of a bolt, and a valve actuator equipped with the fixture.SOLUTION: A fixture includes: a nut 11; a bolt 14 which has a straight portion 12 installed with the nut 11, and a head portion 13 coupled to the straight portion 12; and a washer 16 which is formed with a through-hole 15 inserted by the straight portion 12 at a center, and has an inclined surface 20 inclining downward at a fixed ratio from an outer edge side toward the through-hole 15 on one side. The inclined surface 20 is provided on the whole circumference of the through-hole 15. A diameter contracting area 19 is formed on the straight portion 12 side of the head portion 13, which decreases a diameter at a fixed ratio toward the straight portion 12, and surface-contacts with the inclined surface 20.SELECTED DRAWING: Figure 1
Inventors:
YAMANE TATSUO
KITAJIMA CHIKARA
KITAJIMA CHIKARA
Application Number:
JP2017001696A
Publication Date:
July 19, 2018
Filing Date:
January 10, 2017
Export Citation:
Assignee:
SEIBU ELECTRIC & MACHINERY CO
International Classes:
F16B35/00; F16B43/00; F16K31/53
Domestic Patent References:
| JP2014114942A | 2014-06-26 | |||
| JP2011208743A | 2011-10-20 | |||
| JP2015055318A | 2015-03-23 | |||
| JP2003269434A | 2003-09-25 | |||
| JPS5049541A | 1975-05-02 | |||
| JPS61126164U | 1986-08-08 |
Attorney, Agent or Firm:
Fujio Nakamae
Yohei Kiyoi
Yoshihiro Kurita
Yohei Kiyoi
Yoshihiro Kurita