| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide the rocking structure of a floor part under a bed capable of making a body in a posture nearly similar to a posture of sitting on a chair in a stable state without breakage, or the like. SOLUTION: This rocking structure is provided with a floor part 3 formed of at least three floors on the upper surface side of a supporting frame provided with a driver for a rear floor for derrick-rock-operating a rear floor 3A positioned on a front side among the floors constituting the part 3 around a horizontal shaft center on a rear side, and provided with a driver for a knee floor 3C which is positioned on a rear side among the floors constituting the part 3 and pivotally supports and connects the front end part of a leg floor 3D positioned behind the knee floor 3C to the rear end part of the floor 3C positioned on the side of the floor 3A to operate the knee floor 3C around the horizontal shaft center on a front side in the state of being freely derrickable and rockable. Then, a supporting member 51 with a pair of supporting parts 50, 50 in a front/rear direction, which abuttingly support both lower surfaces of the floor 3C and the floor 3D is provided on the upper surface of the supporting frame in the state of being freely rockable around the shaft center in a right/left direction and the floor 3C is rockably operated to a standing-up side, thereby the floor 3D is supported by the supporting member 51 in a tilting posture of positioning its rear end at a lower side.</p> |
