Patent ID: 9150374
Filing Date: 2015-10-06
Classification: B65H

Abstract:
1. A dancer roller apparatus, comprising: a dancer roller which is arranged with a gap on a conveying path of a long object to convey the long object and is provided between a downstream side conveying unit and an upstream side conveying unit to absorb an amount of slack of the long object between the upstream side conveying unit and the downstream side conveying unit and provide tension to the long object; a drive motor for changing a position of the dancer roller during conveying of the long object and at a time of loading to switch a path length of the long object, the drive motor including a drive axle; and a dancer roller position changing unit which includes a drive transmission gear that is installed at one end of an elevating axle, the drive transmission gear being engaged with a drive gear which is installed at the drive axle of the drive motor which can rotate forward and backward, the dancer roller position changing unit configured to transmit a driving force from the drive motor to change the position of the dancer roller, wherein the dancer roller position changing unit further includes a one way clutch which allows the dancer roller to move in a long object slack direction, and wherein the drive motor is caused to rotate in a direction such that the dancer roller moves the one way clutch in a long object stretching direction during the conveying of the long object.