Nishimura Seisakusho Co.

Jinichi Shoji

Toshiaki Yamaguchi

An apparatus for independently and simultaneously rewinding a plurality of slit strips into rolls is provided for a slitting and rewinding machine. The apparatus includes a single elongated contact roller and a plurality of rewinding cores. The rewinding cores are arranged side by side in at least one row parallel to the axis of the contact roller. Each rewinding core is independently supported for rotation by at least one vertically extending support arm. The support arms for the rewinding cores are in turn pivotally connected to a common support base which is adapted to be positively retracted horizontally away from the contact roller. During rewinding operation, as the diameter of strip rolls wound onto the rewinding core increases, the core support arms are moved angularly from their vertical position. The angular displacement of at least one core support arm is detected to automatically control the retractive movement of the support base in relation to the increasing roll diameter such that the core support arms are kept substantially in their vertical position while maintaining the wound rolls on the cores in constant engagement with the contact roller throughout a rewinding cycle regardless of a change in the diameter of each wound roll.

Apparatus for independently rewinding slit strips in a web slitting and

A method and apparatus for driving a plurality of strip rewinding shafts or cores are provided. The apparatus includes a plurality of hydraulic motors for separately driving a plurality of strip rewinding shafts or cores. The hydraulic motors are connected parallel with a common hydraulic pump to be independently and simultaneously driven by the pump. The hydraulic pump is in turn connected to a DC electric motor, the operation of which is controlled by a torque control to provide an output rotation of a desired torque characteristic. Also connected to the input of the torque control are means for setting the rotational speed of the DC motor, means for detecting the diameter of at least one strip roll being wound and means for detecting the output rotation of the DC motor. In response to output signals from these means, the torque control functions to control the operation of the DC motor for providing the output rotation of a desired torque characteristic which controllably drives the rewinding shaft simultaneously and independently through the hydraulic pump and its associated hydraulic motors.

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Kyoto, Japan

Jinichi Shoji