Document Type and Number:
Japanese Patent JPH0365984
Kind Code:
B2
Abstract:
PURPOSE:To prevent the inconvenience of the plugging, sag, etc., of a belt from occurring by calculating the quantity of a belt wound out by an upper roller and a lower roller and position-controlling an inserting plate during motor suitably by the moving position of the inserting plate. CONSTITUTION:The seat part of a patient travelling grate device is composed of a slidable inserting plate 6 in a horizontal direction and a belt 7 hung on the plate 6 while both edges are wound to rollers 8 and 9 in the upper and lower directions separately, and inserted between a patient 10 and a head 11. Then, a lower roller 9 only pays out the belt 7, the correlation of a patient 10 and the belt 7 does not change, the friction between the inserting plate 6 and the bed can be decreased and the smooth insertion can be executed. The action of the inserting plate 6 is executed by an ordinary PI speed control means 25 and for the belt roller, a position control means 26 of PD and PID is used. Thus, the positional relation of the inserting plate and the belt roller can be always suitably kept.
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Application Number:
JP2278488A
Publication Date:
October 15, 1991
Filing Date:
February 04, 1988
Export Citation:
International Classes:
A61G1/00; A61G7/08
Next Patent: INSTRUMENT AND METHOD FOR INSPECTING WIRING BOARD