Title:
PNEUMATIC PRESSURE CONTROL DEVICE AND PNEUMATIC PRESSURE CONTROL METHOD FOR AUTOMATIC DOOR
Document Type and Number:
WIPO Patent Application WO/2018/169229
Kind Code:
A1
Abstract:
A pneumatic pressure control device for an automatic door comprises: a first direction control valve for controlling the direction of compressed air supplied to a door cylinder for opening and closing a door; a door opening/closing detection sensor for detecting whether the door is opened or closed; first and second discharge paths respectively connected to first and second discharge ports of the first direction control valve; and second direction control valves which are respectively provided at the first and second discharge paths, can be operated according to an emergency stop signal so as to respectively discharge the compressed air discharged from the first and second discharge ports, and can be switched so as to reduce the discharge speed of the compressed air if the door is not completely opened or closed when an operation signal is generated after the emergency stop signal.
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Inventors:
CHO YOUNG-JEON (KR)
Application Number:
PCT/KR2018/002331
Publication Date:
September 20, 2018
Filing Date:
February 26, 2018
Export Citation:
Assignee:
DOOSAN MACHINE TOOLS CO LTD (KR)
International Classes:
E05F15/72; B23Q11/08; E05F5/10; E05F15/56
Foreign References:
| KR20130085684A | 2013-07-30 | |||
| JPH11138384A | 1999-05-25 | |||
| KR101245982B1 | 2013-03-20 | |||
| KR0135071Y1 | 1999-03-30 | |||
| KR20150102772A | 2015-09-08 |
Other References:
See also references of EP 3597849A4
Attorney, Agent or Firm:
PARK, Pil-jin et al. (KR)
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