Patent ID: 8747049

Claim:
A transferring apparatus comprising: a revolving link configured to revolve about a predetermined revolution axis; two hand mechanisms, each of which is configured to hold a wafer and both of which are attached to the revolving link so as to be rotatable about two rotating axes, respectively, the rotating axes being parallel to the revolution axis; and two hand drive mechanisms configured to rotate the hand mechanisms, respectively, wherein: each of the hand mechanisms includes an arm attached to the revolving link so as to be rotatable about the rotating axis and configured to be rotated by the hand drive mechanism; a hand provided at the arm so as to be rotatable about a hand axis parallel to the rotating axis and configured to hold the wafer; and an interlock mechanism configured to rotate the hand in conjunction with rotation of the arm, the interlock mechanism includes a rotating axis pulley fixed to the revolving link so as to be rotatable about the rotating axis; a hand axis pulley provided at the arm so as to be rotatable about the hand axis; and a hand belt hanging between the hand axis pulley and the rotating axis pulley, the interlock mechanism is configured such that a reduction ratio of rotation of the hand to rotation of the arm is not lower than 1.35 and not higher than 1.65, and the hand is fixed to the hand axis pulley.