Method and apparatus for picking up work piece and mounting machine

A pickup apparatus for detaching a work piece attached on an adhesive sheet from said adhesive sheet and transferring it, comprising:

• a suction member disposed below said adhesive sheet for sucking and holding said adhesive sheet, said suction member being movable up and down;
• push-up means for peeling said work piece partially from said adhesive sheet by pressing said work piece through said adhesive sheet without piercing through the adhesive sheet, the push-up means being movable up and down independently from said suction member and being received in said suction member, the push-up means having a linear portion defined by two planar sides joined at an apex and configured to press a linear area of said work piece;
• and
• a suction collet having a plurality of suction holes and disposed above said work piece for sucking and holding said work piece, said suction collet being movable up and down,
• wherein under states where said suction member sucks to hold a lower surface of the adhesive sheet, where said work piece is pressed and partially peeled from said adhesive sheet by said push-up means, where said work piece is supported through the adhesive sheet by said push-up means without piercing through the adhesive sheet, where a line connecting the plurality of suction holes of said suction collet is aligned with and opposed to the linear portion of said push-up means in a suction direction, and where said suction collet and said work piece are spaced from each other, vacuum force is applied to said work piece to completely detach said work piece from said adhesive sheet only by vacuum force without sandwiching said work piece by said suction collet and said push-up means.

A work piece pickup method for sucking and holding a work piece attached on an adhesive sheet by means of a suction collet, having a plurality of suction holes, that is disposed above said work piece attached on said adhesive sheet in such a way as to be movable up and down for sucking and holding said work piece, a suction member movable up and down for sucking and holding said adhesive sheet and disposed below said adhesive sheet, and push-up means movable up and down independently from said suction member and having a linear portion defined by two planar sides joined at an apex and configured to press a linear area of said work piece, so as to detach and transfer said work piece, comprising:

• a sheet suction process for sucking and holding a lower surface of said adhesive sheet corresponding to said work piece by said suction member;
• a process of pressing and partially peeling said work piece by said push-up means from said adhesive sheet held by said suction member without piercing through the adhesive sheet;
• a supporting process for supporting the partially peeled work piece through the adhesive sheet by said push-up means without piercing through the adhesive sheet, the push-up means being disposed in a manner such that a line connecting the plurality of suction holes of said suction collet is aligned with and opposed to the linear portion of said push-up means in a suction direction;
• and
• while maintaining said supporting process, a work piece suction process for sucking and holding said work piece by applying vacuum force from said suction collet to said work piece in a positional relation that said suction collet and said work piece which is partially peeled from said adhesive sheet are spaced from each other to completely detach said work piece from said adhesive sheet only by vacuum force and without sandwiching said work piece by said suction collet and said push-up means.