Nishimura Seisakusho Co.

Toshiaki Yamaguchi

Hideo Mukai

Jinichi Shoji

Keizo Narita

Tsuneo Yoshida

A roll slitting and rewinding machine apparatus for exchanging rewound rolls comprises a frame holding a plurality of slitted strip rewinding roll supporting means arranged in two rows and a carrier rotatably supporting said frame so that said frame is movable from a vertically arranged position and a horizontally arranged position. The carrier being movable from a forward position to a retracted position, whereby when said carrier takes said forward position with said frame taking said first position the rewinding rolls are in condition of rewinding operation while when said carrier takes said retracted position with said frame taking said second position the rewinding rolls are removed from their respective support means.

Apparatus for exchanging rewound rolls in a roll slitting and rewinding

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.

Method and apparatus for driving rewinding shafts for slit strips

An apparatus for suppressing the rotational fluctuation of a supply roll includes a drive source and a differential gear. The drive source is operatively connected to the first input shaft of the differential gear and a support shaft for the supply roll is operatively connected to the second input shaft via a variable speed gear. The output shaft is joined to both a hydraulic coupling and a control for the variable speed gear. A high frequency fluctuation of the rotation of the supply roll causes a forward or reverse rotation of the output shaft of the differential gear. The hydraulic coupling acts to retard the output shaft rotation thereby causing a braking or driving force to be applied through the differential gear to the supply roll for eliminating the rotational fluctuation of the supply roll. The variable speed gear functions to keep the second input shaft of the differential gear to rotate at a fixed average speed while the average rotational speed of the supply roll continues to gradually increase as the roll diameter is reduced with the progress of the unrolling operation.

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Kyoto, Japan

Toshiaki Yamaguchi