Sheet cutting machine

A sheet cutting machine comprising:

• a frame (1);
• a table (2) attached to said frame (1), a sheet bundle (3) being placed on said table (2);
• a cutting blade (4) arranged above said table (2) and opposite to said table (2) so as to cut four sides of said sheet bundle (3);
• a blade receiving plate (5) arranged on said table (2) and opposite to said cutting blade (4);
• a blade drive mechanism attached to said frame (1) and supporting said cutting blade (4) in such a manner that said cutting blade (4) makes a reciprocal vertical movement between a standby position at which said cutting blade (4) is spaced apart upward from said sheet bundle (3), and a cutting position at which said cutting blade (4) comes into contact with said blade receiving plate (5) to cut said sheet bundle (3);
• a positioning block (6) arranged on said table (2) parallel to said blade receiving plate (5) for slide movement in directions toward and away from said blade receiving plate (5), a reference side of said sheet bundle (3) being abutted on said positioning block (6), whereby said sheet bundle (3) is positioned with respect to said cutting blade (4);
• a positioning block drive mechanism attached to said frame (1) and moving said positioning block (6);
• an operation data storage section (15) storing data of a order of cutting of each side of said sheet bundle (3), data of a distance between a cutting line of said positioning block (6) and said sheet bundle (3) for each cutting operation accordance with said order of cutting, and data of both a direction and an angle of rotation of said sheet bundle (3) for each said cutting operation;
• a control section (14) controlling said positioning block drive mechanism based on the data of the distance between the cutting line of said positioning block (6) and said sheet bundle (3) for each said cutting operation recorded in said operation data storage section (15) in such a manner that said positioning block (6) is located at a predetermined position for each said cutting operation;
• and
• an indication section (16) indicating said order of cutting,
• said indication section (16) comprising:
• a display (11);
• an image data storage section (17) recording image data of said sheet bundle (3) and image data of said positioning block;
• an image synthesis section (18) reading the image data of said sheet bundle (3) and the image data of said positioning block (6) from said image data storage section (17), processing the two image data based on the data of both the direction and the angle of rotation of said sheet bundle (3) of said cutting operation read out of said operation data storage section (15), and generating data of a composite image of said cutting operation each time said cutting operation is carried out;
• and
• an image display section (19) reading from said operation data storage section (15) the data of the distance between the cutting line of said positioning block (6) and said sheet bundle (3) of said cutting operation, and displaying said distance on said display (11) together with the order of said cutting operation and said composite image each time said cutting operation is carried out.