| 摘要 |
PROBLEM TO BE SOLVED: To simplify structure and make a system small by constituting a hip bottom of connector plates whose both end parts are disposed over the rotary shafts of a back bottom and the rotary shaft of a knee bottom. SOLUTION: Relating to the hip bottom 1, the connector plates 10 consisting of multiple band-shaped metallic plates are juxtaposed and the centers of the respective connector plates 10 in a length direction are integratedly connected by a connecting material 1 such as pipes, etc. The multiple connector plates 10 are used so that the respective connector plates 10 are easily hooked on gaps provided between the rotary shafts 23 and 32 respectively of the back bottom 2 and the knee bottom 3. The respective connector plates 10 are bent to be almost C-shaped in the both end parts and formed so as to be hooked on the rotary shafts 22 and 32 and the respective rotary shafts 22 and 32 are fitted to the connector plates 10 so as to be rotatable. The both end parts 11A are protruded outwards from the left and right connector plates 10 so as to be used as a support for hands when a user sits up. |
