Jaw cylinder in jaw folder

摘要

A jaw cylinder in a jaw folder is provided, which can correctly adjust a gap between a stationary member and a swing member in a jaw mechanism in accordance with a thickness of a print to be processed. A first base (1) includes a stationary member (11) in a jaw mechanism. A second base (2) includes a swing member (21) having a jaw portion accessible to the jaw portion of the stationary member (11). A third base (3) has end axes (31a, 31b) at both ends and is rotatably supported by the end axes (31a, 31b) on a pair of opposite frames (Fa, Fb). The first (1) and second (2) bases are rotatably located on the third base (3) about the rotational centerline of the third base (3) relative to the third base (3). The first (1), second (2) and third (3) bases synchronously rotate to move the swing member (21) close to and apart from the stationary member(11)togripaprinttherebetween.Ajawclearanceadjusting mechanism (4) turns the first (1) and second (2) bases about the rotational centerline of the third base (3) in opposite directions to adjust a gap between the jaw portions of the stationary (11) and swing (21) members in the jaw mechanism. A first force exerting mechanism (8) always exerts a force on the first base (1) in the direction parallel with the tangent to a rotational trail of the first base (1). A second force exerting mechanism (9) always exerts a force on the second base (2) in the direction parallel with the tangent to a rotational trail of the second base (2).