| 摘要 |
PROBLEM TO BE SOLVED: To completely compress a hose having a comparatively large flow pass cross section without damaging the hose by a flow adjuster by constituting so that a pressure means actively crushes the hose from both sides to compression of the hose. SOLUTION: Pins 6 and 7 have an interval mutually uninfluential on a flow pass cross section of an intake air hose 1 in a first tail end position, and when an electric current is supplied to a rotary solenoid 3, a shaft 5 relatively rotates to a magnet casing 4, and an arm 8, that is, the pin 7 rotates toward the pin 6, and the pin 7 presses one side of the hose 1. The rotary solenoid 3 and the shaft 5 are rotatably arranged in a holding part 10, and since the hose 1 is removably fastened to a respirator, the magnet casing 4, that is, the pin 6 rotates toward the pin 7, and the pin 6 presses the other side of the hose 1. Therefore, almost symmetrical compression of the hose 1 can be obtained. |
