Title:
STRUCTURE FOR AFFIXING DIAPHRAGM TO DRIVE SHAFT, AND ELECTROMAGNETIC CONTROL VALVE
Document Type and Number:
WIPO Patent Application WO/2016/035412
Kind Code:
A1
Abstract:
Provided is an electromagnetic control valve in which force acting on a valve body (31) is cancelled by the use of a diaphragm (4) and by means of differential pressure, wherein the diaphragm (4) has improved durability and improved resistance to pressure. The diaphragm (4) is constituted by base fabric (4A) and a rubber layer (4B), and a drive shaft connection hole (42a) through which a drive shaft (diaphragm fitting section (324)) is passed is provided inside the inner bead section (42) of the diaphragm (4). The diameter φA' of the drive shaft connection hole (42a) is matched to the diameter of the drive shaft (diaphragm fitting section (324)) which is to be mounted in the drive shaft connection hole (42a). A thin-walled disk section (44) is provided inside the inner bead section (42), and an expandable-diameter hole (44a) is formed at the center of the disk section (44). The expandable-diameter hole (44a) and the disk section (44) are pushed and expanded to form a stretched portion (44A)(Fig. 6(C), (D)), and the stretched portion (44A) is received in a receiving groove (324b) in the drive shaft (diaphragm fitting section (324)). The diameter φA of the drive shaft, the diameter φB of the expandable-diameter hole, and the ratio C of elongation of the base fabric (4A) are set so as to satisfy the relationship of 0.7 ≤ A/(B×C) ≤ 3.0.
Inventors:
OKAWARA ICHIRO (JP)
Application Number:
PCT/JP2015/067095
Publication Date:
March 10, 2016
Filing Date:
June 12, 2015
Export Citation:
Assignee:
SAGINOMIYA SEISAKUSHO INC (JP)
International Classes:
F16J3/02; F16J15/52; F16K7/12; F16K7/16; F16K7/17; F16K31/06
Domestic Patent References:
| WO2013157292A1 | 2013-10-24 |
Foreign References:
| JPS5440388U | 1979-03-17 | |||
| JPH10267146A | 1998-10-09 | |||
| JPS62188669U | 1987-12-01 | |||
| JPH05141561A | 1993-06-08 |
Attorney, Agent or Firm:
TAKINO, Hideo et al. (JP)
Hideo Takino (JP)
Hideo Takino (JP)
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