Manufacturing work machine

1. A manufacturing work machine comprising:

a beam member arranged in an X-axis direction of an XY horizontal plane, both ends of the beam member being supported to be movable in a Y-axis direction;

a Y-axis drive device provided on one drive side end section of the beam member, the Y-axis drive device being configured to move the beam member in the Y-axis direction; and

an X-axis drive member configured to move a work head provided on the beam member in the X-axis direction,

wherein

the beam member is a tube with an internal hollow running through in the X-axis direction, and is formed such that a beam width in the Y-axis direction is uniform, and a height direction dimension becomes smaller from the drive side end section to an end section on an other side.

2. The manufacturing work machine according to claim 1 , wherein

a height dimension of the beam member continuously gets smaller from the drive side end section to an intermediate section in the X-axis direction, and the height dimension of the beam member is substantially fixed from the intermediate section to the end section on the other side.

3. The manufacturing work machine according to claim 1 , wherein

the work head is attached to one of a pair of side surfaces of the beam member that are provided upright in the Y-axis direction, and the other of the side surfaces is formed to be thicker than the side surface.

4. The manufacturing work machine according to claim 3 , wherein

the thickness of the other of the side surfaces of the beam member differs at various locations in the X-axis direction.

5. The manufacturing work machine according to claim 1 , wherein the beam member is formed from a casting aluminum alloy.