Abstract: A transfer feeder which comprises: a pair of lifting beams (9) which are so disposed as being parallel to each other and extending in a workpiece conveying direction; a lifting mechanism (10) for driving the said pair of the lifting beams in upward and downward directions; a plurality of pairs of cross bar carriers (15) which are so arranged on the said pair of the lifting beams as to be spaced apart from, and connected with, one another and be displaceable in the said workpiece conveying direction; a cross bar (16) that is transversely bridged across a said pair of those cross bar carriers as afore-said which are juxtaposed with each other, and that has a workpiece attracting means (19) attached thereto; and a feed mechanism (22) for driving the said cross bar carriers in a feed direction, the said transfer feeder being characterized in that at least the said lifting mechanism is provided with its drive source that is constituted by a servo-motor (11).

Abstract: In a transfer feeder in which transfer bars are driven in a feeding direction by swinging a feed lever (4) through a cam-follower (5) by a feed cam (2) mounted to a camshaft (1) rotated by power taken out of a transfer press, a control circuit controls air pressure of a rear cushion cylinder (6) pushing the feed lever to the feed cam to an optimum value in response to a production speed of the press.