Importance

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Abstract

A paper roll mounting device, configured to enable a paper roll to be supported by a paper roll supporting means provided to each arm of pairs of arms by rotary-driving a female screw member to individually move each arm in a direction parallel to a rotating shaft, is provided with: a female screw rotation amount signal output means provided to output a rotation amount signal corresponding to a rotation amount of the respective female screw member, individually on a female screw member basis, in response to rotation of the female screw member; and an arm stop position control unit configured to enable setting of a reference position for each of the arms, and, when changing a position of each of the arms in an axis direction of the rotating shaft, to enable input designation of a stop position of each of the arms, and to detect a current position of the arms with respect to the reference position by calculating a movement amount of the arms based on the rotation amount signal, and thereby move each of the arms to the designated stop position and cause each of the arms to stop at the designated stop position. This makes each of the arms stoppable at a desired position in the direction parallel to the rotating shaft.

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First Claim