Patent ID: 7617924

Claim:
A tray transportation device comprising: a transfer stage, said transfer stage having a buffer area and an operation area; a loading handler, said loading handler disposed on the buffer area to handle a first tray in the buffer area, wherein said loading handler comprises a first loading pushing end and a second loading pushing end; an operation handler, said operation handler disposed on the operation area to handle a second tray in said operation area; and an unload stage, said unload stage used to carry said tray transferred from the transfer stage; wherein said loading handler and said operation handler move together, when said operation handler pushes a sidewall of said second tray directly for transferring said second tray from said operation area to said unload stage, said loading handler pushes a sidewall of said first tray directly for transferring said first tray from said buffer area to said operation area, said first loading pushing end pushes said first tray first and then said second loading pushing end pushes said first tray so as to push said first tray in said buffer area to said operation area.