| 摘要 |
PURPOSE:To constitute a device so that a moving member takes the same locus in case of centering of an adjusting screw, by putting pressure with a press pin, and forming a part supported by two adjusting screws, by a place which has been notched by a prescribed angle. CONSTITUTION:A centering frame 2' being a moving member is placed in a body 1 which is provided with guide holes 1a-1c for centering screws crossing at 120 degree angle, respectively, in the center O, and it is supported by 3 points with a press pin 5 which has been energized with a spring, and centering screws 3, 4 being two adjusting screws. A part which is supported by the centering screws 3, 4 is notched at an angle which has been inclined by a prescribed angle theta, so that the centering screws 3, 4 and the press pin 5 are inclined by gap portions 3a, 4a and 5a between the respective guide holes as shown in the figure, and stand still. Therefore, the centering screws 3, 4 are always in a state that they have been pressed against one side of the body 1, and even when they are pushed or drawn, the locus of the centering frame 2' remains unchanged. |
