| 摘要 |
<p>PURPOSE:To enable the operation of the side fence of a bed with light labor even by a user on the floor part of the bed or the like by turnably supporting an electric-motor driven screw shaft in the width direction of a floor-part supporting frame, and by constituting a relatively movable driving mechanism between either of supporting arms and a nut movably screwed on the screw shaft. CONSTITUTION:A screw shaft 10 being driven by an electric motor 9 is turnably supported in the width direction of a floor-part supporting frame 1 so as to correspond to one side in the longitudinal direction of the floor-part supporting frame 1, and onto the screw shaft 10, a nut 11 is screwed in. On both sides in the lateral direction of this nut 11, rollers 12 are provided, and also a guide frame 13 for movably supporting the rollers 12 is provided to supporting arms 6a which have been made up so as to correspond to both sides of the nut 11, and the rollers 12 and the guide frame 13 constitute a driving mechanism 14. Further, the screw shaft 10 and the nut 11 not only constitute an ordinary screw mechanism, but also constitute a ball-screw constituent element.</p> |
