Nipping roller gap adjusting device

A nipping-roller gap adjusting device in a rotary press which is provided with nipping rollers including a positioned roller rotatably provided at a prescribed position and a movable roller, the nipping rollers are adapted so that the movable roller is capable of forcing a paper web passing between the nipping rollers onto the positioned roller, the nipping-roller gap adjusting device comprising:

• a pair of supporting arms, a supported end of each of the supporting arms being swingably supported and a supporting end of each of the supporting arms rotatably supporting the movable roller;
• a pressing force imparting means which applies a force working to the supporting arms in such a direction that causes the movable roller to approach the positioned roller, the pressing force imparting means adjusting the magnitude of the force,
• a minimum gap setting means for setting a minimum gap between the positioned roller and the movable roller;
• a gap adjusting means which is supported together with the positioned roller and which adjusts a distance making the movable roller approach the positioned roller;
• and
• a fixed frame member which rotatably supports the positioned roller, the gap adjusting means being mounted on the fixed frame member.