| 摘要 |
PURPOSE:To make setting of pins securely by sensing the luminous difference produced at the pin detainee part, retainer's oversurface and in a long hole provided in the retainer. CONSTITUTION:A long hole provided in the retainer 10 is projected on a screen 26 darker than other parts, and the whole screen 26 is rotated so that a sensor 32 can sense this dark spot with long hole. A pin 7 is set in the retainer 10, and the detainee part 15 for the pin comes over this long hole. Then a motor M is driven until the reflected beam by this detainee part 15 projected on the screen 26 reaches the position of the sensor 31, and rotation is made by putting the cogs formed on the pin 7 in meshing with the cogs 18 formed on the assembly body 19. The sensor 31 is so set as to react when the detainee part 15 of the pin comes in position perpendicular to the long hole in retainer 10, so that setting of pins is made securely. |
