| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a door drive device for an automatic ticket gate, always keeping a opening/closing position of a door in a prescribed position, and not requiring frequent adjustment. <P>SOLUTION: In Figure (a), drive force of a motor 32 is transmitted to a door shaft 24 by use of a first belt 44, and a rotation angle of the door 24 shaft is transmitted to a sensor shaft 26 by use of a second belt 47. Because a drive system (the first belt 44) and a signal system (the second belt 47) are made to be independent of each other, trouble such as tooth skipping or elongation of the first belt 44 does not run to the sensor shaft 26 even if the trouble occurs in the first belt 44, and sensors 51-53 can always accurately detect the opening/closing position of the door 12 to always keep the opening/closing position of the door in the prescribed position. Because a direction of the second belt 47 can be freely selected, a position of the sensor shaft 26 can freely determined to drastically improve flexibility of a design. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
