PROBLEM TO BE SOLVED: To return a back floor section and a first leg floor section raised at an optional angle to an initial state by simple control.SOLUTION: The device includes a controller which controls a first drive source for driving up and down the back floor section by operation of a remote controller and a second drive source for driving up and down the leg floor section up. The controller has a basic pattern for operating up and down the back floor section and leg floor section in interlocking with each other at a predetermined ratio, a first pattern for raising the back floor section to a rising limit angle from a state where the back floor section and leg floor section are raised at a middle angle, and a second pattern for lowering the leg floor section to a lowering limit angle from a state where the back floor section and leg floor section are raised. In the first pattern and the second pattern, the back floor section and leg floor section are driven in such a manner that the back floor section and leg floor section being shifted from the basic pattern are raised in interlocking with each other based on the predetermined ratio of the basic pattern, and the back floor section and leg floor section not being returned to the initial state of the basic pattern are then returned to the initial state.COPYRIGHT: (C)2013,JPO&INPIT【課題】任意の角度で起上した背床部と第1の脚床部を容易な制御で初期状態に戻すことができるようにしたこと。【解決手段】リモートコントローラの操作によって背床部を起伏駆動する第1の駆動源と脚床部を起伏駆動する第2の駆動源を制御する制御装置を具備し、制御装置は、背床部と脚床部とを所定の割合で連動させて起伏動作させる基本パターンと、背床部と脚床部とが途中の角度に起上した状態から上記背床部を上昇限の角度まで起上させる第1のパターンと、背床部と脚床部とが起上した状態から背床部を下降限の角度まで倒伏させる第2のパターンを有し、第1のパターンと第2のパターンは、基本パターンからずれた状態にある背床部と脚床部とを、基本パターンの所定の割合に基いて連動させて起伏動作させた後、基本パターンの初期状態に戻っていない背床部と脚床部を初期状態に戻すよう駆動するようになっている。【選択図】 図5
