Sheet cutting machine

A sheet cutting machine for cutting a first sheet into second sheets and margins, the machine comprising:

• a first conveying part arranged to convey the first sheet along a conveying path;
• a cutting part arranged downstream of and apart from the first conveying part to cut the first sheet in a direction perpendicular to a conveying direction;
• a sorting unit arranged to remove the margins from the conveying path, the margins being cut off from the first sheet by the cutting part;
• and
• a control unit configured to control the first conveying part, the cutting part and the sorting unit based on. cutting information about cutting of the first sheet,
• the sorting unit including:
• a second conveying part arranged downstream of and apart from the cutting part to receive the first sheet from the first conveying part and to convey the second sheets cut off from the first sheet by the cutting part;
• a retracting mechanism arranged to upwardly retract the second conveying part from the conveying path;
• and
• a deflecting plate for deflecting the first sheet away from the conveying path while the first sheet is conveyed by the first conveying part, the deflecting plate being moved together with the second conveying part by the retracting mechanism, wherein
• when a first length in the conveying, direction of the margin to be cut off is shorter than a predetermined distance between the cutting part and the second conveying part, the first sheet is fed to the cutting part by the first conveying part while the second conveying part is kept positioned at the conveying path, and the margin is cut off from the first sheet by the cutting part, and
• when a second length is equal to or longer than. the predetermined distance, the first sheet is fed to the cutting part by the first conveying, part after the second conveying part is retracted from the conveying path by the retracting mechanism, and the margin is cut off from the first sheet by the cutting part, and wherein
• the deflecting plate is apart from the conveying path when the second conveying part stays at the conveying path, and
• the deflecting plate stays at the conveying path when the second conveying part is apart from the conveying path.