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Title:
POSITIONING ACTUATOR
Document Type and Number:
Japanese Patent JPH0771406
Kind Code:
A
Abstract:

PURPOSE: To maintain compatibility between a flexible motion without any shock and high positional accuracy, and provide a positioning actuator pertinent for a manufacturing facility by allowing an intermediate stop position to be accurately determined while maintaining a space-saving characteristic and crawling drive stability as an advantage pertaining to a flexible actuator.

CONSTITUTION: A positioning actuator 1 gives a flexible movement via the expansion and contraction of a telescopic tube 2, and a positioning sensor 10 is housed within the tube 2, thereby making a device compact. Furthermore, a movable holder 4 can be stopped at an arbitrary intermediate position without generating any dust by controlling a pressure feed valve 8 and a pressure releasing valve 9 for the open/close operation thereof. In addition, high positional accuracy can be provided by performing the control operation via a PWM modulation process. Also, the telescopic movement of the tube 2 does not employ the principle of frictional slide and a sticking phenomenon does not appear, thereby allowing stable crawling drive and smooth stopping behavior. Furthermore, when the valves 8 and 9 are closed, the inside of the tube 2 becomes airtight and the tube 2 is free from dislocation, even if left in place for a long time.


Inventors:
UCHIDA KOJI
TARUSAWA TETSUNOBU
Application Number:
JP24200293A
Publication Date:
March 17, 1995
Filing Date:
September 01, 1993
Export Citation:
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Assignee:
CKD CORP
International Classes:
F15B9/09; F15B15/10; F15B15/14; F15B15/28; (IPC1-7): F15B9/09; F15B15/10; F15B15/14; F15B15/28
Domestic Patent References:
JPS6226982A1987-02-04
JPS62184202A1987-08-12
JPS61157804A1986-07-17
Attorney, Agent or Firm:
Takashi Tomizawa (2 outside)



 
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