| 摘要 |
PROBLEM TO BE SOLVED: To provide a belt driving device having a control means of simple structure capable of correcting meandering of a belt with a simple method. SOLUTION: This belt driving device comprises a belt edge position detecting means 21 for detecting the quantity of meandering of a turning endless belt 1, and settles the quantity of meandering of the turning endless belt 11 between two standard positions preset by the belt edge position detecting means 21. This means has a belt meandering preventing method for tilting a driving roller 4 and a driven roller 3, or the driving roller 4 or the driven roller 3, in the vertical direction or in the back and forth direction by operating roller tilting means 53, 54, 63 and 64 based on a control signal generated from the two standard positions when the turning endless belt 1 exceeds a range of the preset two standard positions, and for settling meandering of the endless belt 1 within the range of the preset two standard positions. COPYRIGHT: (C)2008,JPO&INPIT
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