Screen printing machine having a screen position adjusting device

A screen printing machine configured to print solder cream on a circuit substrate through a through hole of a mask, the screen printing machine comprising:

• a main body frame;
• a mask frame configured to hold the mask;
• a mask frame receiver held by the main body frame and configured to move relative to the main body frame in a parallel direction that is parallel to the mask, the mask frame receiver being configured to receive the mask frame;
• a squeegee moving device configured to move together with the mask frame receiver while the mask frame receiver is moving relative to the main body frame in the parallel direction, the squeegee moving device being configured to move a squeegee;
• a substrate support device configured to support the circuit substrate, the substrate support device being unmovable relative to the main body frame at least in the parallel direction that is parallel to the mask;
• and
• a position adjusting device configured to adjust a position of the mask frame receiver relative to the main body frame in the parallel direction, the position adjusting device being provided between the mask frame receiver and the main body frame,
• wherein:
• the position adjusting device is configured to adjust a first position and a second position of the mask frame receiver respectively in a first direction and a second direction which intersect each other in an adjustment plane parallel to the parallel direction, the position adjusting device being configured to adjust a rotational position of the mask frame receiver about a rotation axis perpendicular to the adjustment plane, and
• the position adjusting device includes:
• two first slides provided at respective two positions spaced apart from each other in the first direction such that positions of the first two slides in the second direction are adjustable,
• two second slides held by the two first slides, respectively, so as to be movable relative to the respective first slides in the first direction,
• two first rotational members fixed to the mask frame receiver and held by the two second slides, respectively, such that each of two first rotational members is rotatable relative to a corresponding one of the two second slides about a rotation axis perpendicular to the adjustment plane,
• a third slide provided at a position spaced apart from the two first slides in the second direction such that a position of the third slide in the first direction is adjustable,
• a fourth slide held by the third slide so as to be movable relative to the third slide in the second direction, and
• a second rotational member fixed to the mask frame receiver and held by the fourth slide so as to be rotatable relative to the fourth slide and about a rotation axis perpendicular to the adjustment plane.