Patent ID: 8011874
Filing Date: 2011-09-06
Classification: B25J,H01L,Y10T

Abstract:
1. A transfer apparatus comprising: a stationary base; a lift base; a lifting mechanism for vertically moving the lift base relative to the stationary base; a rotary base mounted to the lift base; a rotating mechanism for rotating the rotary base about a vertical rotation axis; a linear moving mechanism supported by the rotary base; and a hand for holding a work, the hand being supported by the linear moving mechanism; wherein the lifting mechanism includes a slide guide mechanism for guiding vertical movement of the lift base, a first screw-feeding mechanism, and a second screw-feeding mechanism, wherein each of the first and the second screw-feeding mechanisms includes a rotatable vertical screw shaft, and a nut member provided on the lift base and screwed onto the screw shaft, the first and the second screw-feeding mechanisms being spaced from each other with the rotation axis being located between the first and the second screw-feeding mechanisms, wherein the slide guide mechanism comprises a first vertical guide rail and a first pair of guide members fixed to the lift base and held in sliding engagement with the first vertical guide rail, the first pair of guide members being spaced vertically from each other along the first vertical guide rail, and wherein the pair of guide members includes an upper guide member located higher than the nut member and a lower guide member located lower than the nut member.