Abstract: A thin motor-driven centrifugal blowing fan apparatus draws in air in a rotation-axis direction and discharges the air in a radial direction. In this fan apparatus, blades are fitted on a peripheral face of a rotor, and each section of the blades in the vicinity of the peripheral face is implanted at an acute angle to the rotation direction so as to form an axial blade section. A section extending from the axial blade section is arranged perpendicular to the rotation direction so as to form a centrifugal blade section.

Abstract: A stud welding apparatus has a welding jig, guide frames and a cartesian coordinate type robot. This robot has a travelling frame, a robot main body, an elevating arm and a stud welding gun. Power supply passages are provided on the travelling frame, the robot main body and the elevating arm, respectively, such that electric power can be supplied from a welding power source to the stud welding gun via these power supply passages. The power supply passage provided on the travelling frame is formed in a first power supply bar which is fixed to the travelling frame and is elongated in a horizontal direction. A pressure type first power supply joint is provided on the robot main body and urges a contact member to be connected to the power supply passage provided on the robot main body into contact and away from the first power supply bar by means of a cylinder.