US 8,011,874 B2Granted

Transfer apparatus

AssigneeDAIHEN Corporation

InventorsTakafumi Uratani, Daisuke Sado, Hideki Matsuo

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Abstract

A transfer apparatus includes a stationary base, a lift base, a lifting mechanism for vertically moving the lift 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 work hand supported by the linear moving mechanism. The lifting mechanism includes a slide guide mechanism for vertical movement of the lift base, and first and second screw-feeding mechanisms. Each screw-feeding mechanism 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 are spaced from each other, with the rotation axis of the rotary base being located between the first and the second screw-feeding mechanisms.

Claims7

Dependent claims

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.

9 more elements

Dependencies are inferred from the claim text.