| 摘要 |
A lead-in roller clearance adjustment mechanism (10) includes a pair of lead-in rollers (9A, 9B) for guiding a web (W) with a clearance therebetween and a clearance adjustment mechanism for adjusting an amount of clearance. The lead-in roller clearance adjustment mechanism further includes motors for driving the clearance adjustment mechanism and potentiometers for detecting output positions of these motors, and adjusts the amount of clearance automatically. A clearance adjustment device for the lead-in roller clearance adjustment mechanism includes a control device (30) for an automated paper threading device and for clearance adjustment between the lead-in rollers (9A, 9B), a web thickness of the web (W) being inputted in the control device, the control device controlling the motors in order that the amount of clearance can be set at a predetermined value before threading the web (W) into a lead-in roller unit, and that the amount of clearance can be set at a value corresponding to the inputted web thickness of the web (W) after threading the web (W) into the lead-in roller unit.
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