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JPS57103909A - Safe operation circuit in work machine using air pressure - Google Patents

Safe operation circuit in work machine using air pressure

Info

Publication number
JPS57103909A
JPS57103909A JP18161480A JP18161480A JPS57103909A JP S57103909 A JPS57103909 A JP S57103909A JP 18161480 A JP18161480 A JP 18161480A JP 18161480 A JP18161480 A JP 18161480A JP S57103909 A JPS57103909 A JP S57103909A
Authority
JP
Japan
Prior art keywords
spool
work machine
air
air pressure
safe operation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP18161480A
Other languages
Japanese (ja)
Other versions
JPS6125925B2 (en
Inventor
Tatsushi Kamimura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honda Motor Co Ltd
Original Assignee
Honda Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Priority to JP18161480A priority Critical patent/JPS57103909A/en
Publication of JPS57103909A publication Critical patent/JPS57103909A/en
Publication of JPS6125925B2 publication Critical patent/JPS6125925B2/ja
Granted legal-status Critical Current

Links

Landscapes

  • Fluid-Pressure Circuits (AREA)

Abstract

PURPOSE: To realize the purpose of a dual starting type safe operation circuit by cylindrical unit equipped with a spool as well as composing so that the work machine may not operate if two air and hand operating valves are not put in operation simultaneously.
CONSTITUTION: When one of the air and hand operating valves 1, 2, e.g. 1 is pushed in a state that a spool 12 of control cylinder 11 is in a neutral site, the right chamber S1 of the cylinder 11 is provided with the air, and the spool 12 goes toward the left against a spring 16 to close outer port 21. When the other valve 2 is pushed, the sectional area of concave part 15b is smaller than the pressed area of edge surface of the spool 12 because a seal member 19 of the spool 12 is closely attached to edge lid 15, so the spool 12 does not go toward the right by the air pressure provided to port 15a, resulting in continuous closing of the outer port 21. Thus work cylinder 8 of the work machine is kept inactive.
COPYRIGHT: (C)1982,JPO&Japio
JP18161480A 1980-12-22 1980-12-22 Safe operation circuit in work machine using air pressure Granted JPS57103909A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18161480A JPS57103909A (en) 1980-12-22 1980-12-22 Safe operation circuit in work machine using air pressure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18161480A JPS57103909A (en) 1980-12-22 1980-12-22 Safe operation circuit in work machine using air pressure

Publications (2)

Publication Number Publication Date
JPS57103909A true JPS57103909A (en) 1982-06-28
JPS6125925B2 JPS6125925B2 (en) 1986-06-18

Family

ID=16103875

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18161480A Granted JPS57103909A (en) 1980-12-22 1980-12-22 Safe operation circuit in work machine using air pressure

Country Status (1)

Country Link
JP (1) JPS57103909A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006004079A1 (en) * 2004-07-06 2006-01-12 Smc Corporation Bimanual control valve
WO2006011627A1 (en) * 2004-07-27 2006-02-02 Toyota Jidosha Kabushiki Kaisha Malfunction prevention device in fluid sequence apparatus
US7481149B2 (en) 2005-07-04 2009-01-27 Smc Corporation Bimanual control valve

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006004079A1 (en) * 2004-07-06 2006-01-12 Smc Corporation Bimanual control valve
WO2006011627A1 (en) * 2004-07-27 2006-02-02 Toyota Jidosha Kabushiki Kaisha Malfunction prevention device in fluid sequence apparatus
US7481149B2 (en) 2005-07-04 2009-01-27 Smc Corporation Bimanual control valve

Also Published As

Publication number Publication date
JPS6125925B2 (en) 1986-06-18

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