| 摘要 |
<p>PURPOSE:To obtain a device by which an attitude and the position in the front and rear direction can be easily recognized, and with high accuracy, by providing a limit switch whose operating part is protruded at the upper surface of a bottom, and providing a light emitting diode and a pair of optical sensors at the side plane of a bottom facing with a mis-insertion preventing guide groove at the bottom plane of a cassette. CONSTITUTION:An optical sensor 9 is provided at the inside of the opposite side plane of a bottom 1, and receives light from a light emitting diode 8. The position of the optical path is set so that it passes within a mis-insertion preventing groove 10 provided at a cassette 6, when the cassette 6 is loaded at the bottom 1. By structuring the device in such way, it is detected that the cassette 6 is not in a floating state by depressing a limit switch 7 by the cassette 6 when the cassette 6 is loaded at the bottom 1, and the position in the front and rear direction can be recognized by receiving the light beams of the light emitting diode 8 with the optical sensor 9.</p> |
