To solve problems of an opening/closing device wherein the circuit structure is complicated because a hydraulic pressure control circuit of a hydraulic cylinder to control the lifting of a delivery table and reclining of a backrest, etc. and a motor control circuit for shutting off the power distribution to a motor by the leg force of a patient are necessary, and wherein the manufacturing cost is high because the mechanism for the opening/closing motions based on the motor control is complicated.
The leg supporter opening/closing device for the obstetric delivery table includes: a pair of rotary links 12 with one ends journaled to a delivery table body side and the other ends to which leg supporters 11 are attached; double-action hydraulic cylinders 13 for the leg supporters set between the rotary link and the delivery table body side; sensors 12a for detecting the amount of rotation of the rotary links; a branched oil pipe for connecting the hydraulic cylinders for the leg supporters with a hydraulic pump OP; one solenoid valve EV attached between the hydraulic pump and the branched point in the oil pipe; and a control circuit OR for shutting off the power distribution to the solenoid valve with the output from the sensors.
IRISAWA HARUMI
KOTO TOMOHIRO
Shinichi Fukuda
Kyosuke Kato
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