To elevate and lower a partition interlocking with the opening and closing of the rotary door of a housing part housing a dental treatment unit.
A partition elevating/lowering means comprises a pantograph type linking mechanism for which the almost center parts of two links respectively are connected so as to be freely turned through a pin. In the pantograph type linking mechanism, the lower end of one (a) of the two links (a) and b is connected to the lower end of a door frame 10 so as to be freely turned, and the other end is engaged with a horizontally long hole 8 formed at the lower end of the partition 5 freely slidably through a slide pin 9. Also, the upper end of the other link b is connected to the lower end of the partition 5 so as to be freely turned, and the other end is connected to a female screw 13 screwed to a screw shaft 12 rotated interlocking with the rotation of a guide wheel 11 so as to be freely turned. One end of the link b is moved forward and backward by the female screw 13 moved in the horizontal direction by rotating the screw shaft 12 by the rotation of the guide wheel 11, and the partition 5 is elevated and lowered at the other end of the links (a) and b.
KIKUCHI MASAAKI
SAITO TAKAO
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