PURPOSE: To control the speed and degree of closing a blade by turning a second blade to a first blade by a fluid driving device, controlling a servo mechanism by the second blade and a turning handle, controlling the operation of the fluid driving device and turning the second blade to the first blade matched with the movement of the turning handle.

CONSTITUTION: First and second members 24 and 22 operated corresponding to relative movement from a first position to a second position and a frame 62 for supporting the members 24 and 22 so as to perform the relative movement are equipped. A second handle 66 is supported so as to be moved regardless of the members 24 and 22, the second handle 22 is extended in a direction opposite to the second member 22 and a first handle 64 is extended in the direction opposite to the first member 24. Then, the fluid driving device 88 for moving the first member 24 and the servo mechanism 82 for controlling the fluid driving device 88 by being controlled by the second member 22 and the second handle 66 and operating the second member 22 to the first member 24 matched with the movement of the second handle 66 are equipped.