| 摘要 |
<p>PURPOSE: To make it possible to automatically wash the back, by a method wherein as a user sitting on a seat applies or releases pressure on an elastic body through his back, a plurality of switching valves are switched, and a contact body and a washing control part are contacted or separated to let the elastic body go up and down. CONSTITUTION: When using the washer, if an opening and closing controller 16 of a fourth switching valve 10 is set to the opening position and a switching controller 13 of a first switching valve 7 is set to the washing position, air is supplied to a washing circuit 39. Then, if a contact body 31 is pressing a washing controller 33, the air flows into the head side of a vertical cylinder 2 from a third switching valve 9 through the fourth switching valve 10, and the air of the rod side flows out of the third switching valve 9, so that an elastic body 4 is raised by a vertical piston rod 3. If a user presses the elastic body 4 with his back to incline the vertical cylinder 2 rearward, the contact body 31 releases the pressure of the washing controller 33, so that the third switching valve 9 is switched, and the air flows into the rod side of the vertical cylinder 2 to lower the elastic body 4.</p> |
