Abstract: A workpiece transfer device includes an elongated hollow housing, a plurality of push mechanisms, a plurality of coupling devices, a plurality of lever mechanisms, and an elongated swing member. The push mechanisms have a plurality of spindles disposed inside and spaced longitudinally of the housing. Each of the coupling devices has a cylindrical sleeve member sleeved rotatably on a corresponding one of the spindles, and at least one cantilever extending radially from the sleeve member for turning about the corresponding one of the spindles. Each of the cantilevers has a distal end distal from the corresponding one of the spindles. Each of the lever mechanisms has a lever connected pivotally to a corresponding one of the cantilevers. Each of the levers has a first end portion engaging the corresponding one of the spindles, and a second end portion adjacent to the distal end of the corresponding one of the cantilevers.

Abstract: A reciprocating mechanism includes a seat body, a longitudinal first slide member, and a second slide member. The seat body has therein a longitudinal first guiding groove, a second guiding groove intersecting the first guiding groove, and a crossing space at the intersection of the first and second guiding grooves. The first slide member is disposed slidably and reciprocatingly in the first guiding groove across the crossing space, and has a longitudinal cam member extending longitudinally of the first slide member. The second slide member is mounted slidably on the seat body along the direction of the second guiding groove, and incorporates a cam follower which extends into the crossing space to contact the cam member. The cam follower is movable to-and-fro along the second guiding groove when the cam member reciprocates along the first guiding groove, thereby moving reciprocatingly the second slide member along the second guiding groove.

Abstract: A punch press includes a driving crankshaft and a plurality of independent punch pressing units. The crankshaft has a plurality of angularly spaced eccentric sections. Each of the punch pressing units includes a slide, a coupler interconnecting the slide and one of the eccentric sections of the crankshaft, a punch carried on the slide, a die set, and a workpiece gripping unit.