Conveyors: power-driven – Conveyor system for moving a specific load as a separate unit – System includes an oscillating or reciprocating load...
Patent
1997-11-21
1999-11-23
Bidwell, James R.
Conveyors: power-driven
Conveyor system for moving a specific load as a separate unit
System includes an oscillating or reciprocating load...
B65G 4700
Patent
active
059883537
ABSTRACT:
A circuit-component transferring apparatus including a sucker which holds a circuit component by applying a negative pressure thereto; a sucker moving device which supports the sucker such that the sucker is movable upward and downward relative thereto and which moves the sucker in a direction intersecting a direction of the upward and downward movements of the sucker; an elevating and lowering device which includes a drive member and which moves the sucker upward and downward by elevating and lowering the drive member; a pressure switching valve which is supported by the sucker moving device and which includes a movable switch member; and a valve control device which is actuated by the elevating and lowering device and which is selectively placed in one of a component-sucking control state in which, when the elevating and lowering device moves the sucker downward by lowering the drive member, the valve control device moves the switch member to a negative-pressure supplying position at which the switch valve permits a negative pressure to be supplied to the sucker and a component-releasing control state in which, when the elevating and lowering device moves the sucker downward by lowering the drive member, the valve control device moves the switch member to a negative-pressure removing position at which the switch valve permits a pressure not lower than an atmospheric pressure to be supplied to the sucker.
REFERENCES:
patent: 3677419 (1972-07-01), Giffen
patent: 4509555 (1985-04-01), Stirbis
patent: 4509891 (1985-04-01), Lipscomb
patent: 5457874 (1995-10-01), Yonezawa et al.
Asai Koichi
Suhara Shinsuke
Bidwell James R.
Fuji Machine Mfg. Co. Ltd.
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