Manufacturing apparatus for robot arm

1. A manufacturing apparatus for a robot arm including an arm main body with a long tubular or columnar shape having a uniform lateral cross-section, and attachment interface parts that are fixed to both sides of the arm main body and are attached to another member, the manufacturing apparatus comprising:

a pair of fixing parts supporting at least a part of each of the attachment interface parts and each end of the arm main body in a positioned state and each including a space at least near a joint part between each of the attachment interface parts and the arm main body;

a slide mechanism capable of adjusting a distance between the two fixing parts along a longitudinal axis of the arm main body by moving at least one of the fixing parts; and

a material injection part that injects a molten material into at least a part of the space so as to integrally joint each of the attachment interface parts to each end of the arm main body,

wherein a material filling space, which is filled with the molten material, of the space has:

at least part of a first end proximate the arm main body, the first end having a cross sectional shape conforming to a cross sectional shape of the arm main body; and

at least a part of a second end proximate one of the attachment interface parts, the second end having a shape conforming to an outer peripheral surface of one of the attachment interface parts, and

wherein the material filling space has a hollow between at least the part of the first end and at least the part of the second end.

2. A manufacturing apparatus for a robot arm including an arm main body with a long tubular or columnar shape having a uniform lateral cross-section, and attachment interface parts that are fixed to both sides of the arm main body and are attached to another member, the manufacturing apparatus comprising:

a pair of fixing parts each including a space for molding each of the attachment interface parts and capable of supporting each end of the arm main body in a positioned state at a position of blocking the space;

a slide mechanism capable of adjusting a distance between the two fixing parts by moving at least one of the fixing parts; and

a material injection part that injects a molten material into at least a part of the space so as to mold each of the attachment interface parts and integrally joint each end of the arm main body to each of the molded attachment interface parts,

wherein a material filling space, which is filled with the molten material, of the space has:

at least part of a first end proximate the arm main body, the first end having a cross sectional shape conforming to a cross sectional shape of the arm main body; and

at least a part of a second end proximate one of the attachment interface parts, the second end having a shape conforming to an outer peripherical surface of one of the attachment interface parts, and

wherein the material filling space has a hollow between at least the part of the first end and at least the part of the second end.

3. The manufacturing apparatus for a robot arm according to claim 1 , wherein

the arm main body and the attachment interface parts each have an outer surface at least a part of which is formed of resin, and

the molten material is resin.

4. The manufacturing apparatus for a robot arm according to claim 1 , wherein the molten material is metal.

5. The manufacturing apparatus for a robot arm according to claim 4 , wherein the arm main body and the attachment interface parts are formed of metal.