PURPOSE: To detect a door-catch with high degree of accuracy to reopen and reshut automatically a door and to promote safety by providing an encoder, position, speed detection means, reference speed setting section and comparison section, etc., to a door opening and shutting controller operated with a pneumatic cylinder.
CONSTITUTION: A door is opened, shutted and driven with a pneumatic cylinder 15 and, at the same time, a door position and a moving speed are detected with pulse signals of an encoder 16 provided to the cylinder 15 through a position detecting means 17 and a speed detection means 18. A standard speed as a decision basis of door-catch detection is set in correspondence with position signals from the position detection means 17 in a reference speed setting section 19, the reference speed is compared with speed data from the speed detection means 18 by a comparison section 21 to judge on whether or no there is the door-catch, so that opening and shutting signals can be outputted to a door opening and shutting control section 20. A correction means consisting of a decision section, computing store section, correction operating section, etc., is added, and it is so constituted that the reference speed can be set more accurately.
| JP2006257780 | GATE OPENING AND CLOSING DEVICE |
KAWATO KENJI
TSUCHITO SHIGEAKI
MATSUMOTO SHIGENOBU
NIPPON SHARYO SEIZO KK