Title:
【考案の名称】デユアルバルブの故障検出装置
Document Type and Number:
Japanese Patent JPS5842699
Kind Code:
Y2
Abstract:
A failure detecting apparatus for a dual valve provided in a pneumatic circuit for a slide of a press machine, which comprises an air tank containing compressed air therein, a clutch and brake mechanism for the slide selectively connectible with the air tank, a pair of solenoid valves connected in parallel with the air tank and the clutch and brake mechanism, each of the solenoid valves having two positions wherein the clutch and brake mechanism is connected to atmosphere when the solenoid valve is at first position and is connected to the air tank when the solenoid valve is at second position, and a pressure operated switch interposed between the solenoid valves and the clutch and brake mechanism wherein the pressure operated switch is adapted to be turned on and off for each cycle of the slide when both solenoid valves are in good working order.
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Inventors:
Shujiro Matsushima
Yoshioka Akio
Akihiko Nakano
Yoshioka Akio
Akihiko Nakano
Application Number:
JP14997577U
Publication Date:
September 27, 1983
Filing Date:
November 10, 1977
Export Citation:
Assignee:
KOMATSU LTD.
International Classes:
F16K37/00; B30B15/14; B30B15/28; F15B20/00; F16D67/02; (IPC1-7): F16K37/00
Attorney, Agent or Firm:
Yonehara Masaaki