any location of the stand 13 the operation of this embodiment will be described hereinafter at first a case to wash the first position is described when a user pushes the first switch 44 water is supplied into the opening 1 resulting in that the first nozzle 7 extends to the first nozzle advanced position by the resulting water under pressure against the spring pressure at the same time the motor 33 moves the stand 13 ahead so the interrupting plate 35 goes through the sensor 34 and interrupts infrared rays radiated from the emitting part 34a the sensor 34 detects that the interrupting plate 35 is in the first nozzle advanced position and provides a signal to a control means not shown to stop the motor 33 thus the first nozzle 7 is placed at the first washing position the water supplied to the opening 1 flows into the nozzle supporter 2 a gate 5 and the water way 6 in the nozzle and at last splashes from the splashing opening 10 toward the first washing position at this time the nozzle 7 is extended to a position 34 a 34 after a stroke of l1 l2 34 l1 34 shows a stroke of the first nozzle 7 and 34 l2 34 shows a stroke of the nozzle supporter 2 when the user wants to wash in front of the position a the user can select 34 front switch 34 which makes the motor 33 to drive to the left in fig3 and the nozzle 7 moves to 34 b 34.