Abstract: A gripper device for thin, plate-like parts, especially sheet-metal parts, is provided with a plurality of suction cups (26,28,30,32) disposed on the underside of a carrier frame. The suction cups (26,28,30,32) are fixed to the outer ends of four gear racks (18,20,22,24) which are disposed as a cross and can be displaced longitudinally along two superimposed planes. In the center of the cross formed by the racks, mounted in a vertical axis, there is a toothed gear (46) which extends over both superimposed planes. The gear racks (18,20,22,24) engage with the toothed gear (46) in pairs from diametrically opposed sides. A control rod (72) with a gear rack profile engages with the toothed gear (46) on a third plane and has an engaging device (76) at one radially external end by means of which an adjusting force can be exerted on the control rod in order to displace it in the longitudinal direction.

Abstract: A centering device for material (76,78) conveyed on conveyor systems comprises pusher elements (48,50) disposed on both sides of the conveyor system such that they can be moved to and fro in the direction of the center line of the conveyor system. The pusher elements (48,50) each comprise at least two stoppers (48,50) which can be moved along parallel guide components (22,24) oriented towards center line (18), said stoppers being connected with one and the same endless traction element (30) such that they are driven in the same direction, with said traction element being threaded to and fro around guide components (22,24).

Abstract: A trolley for track systems with essentially right-angled intersections is equipped with raisable and lowerable rollers which can be lowered to engage with, and raised to disengage with, one of the pairs of tracks. A common actuator (76,78) simultaneously lowers, in relation to the trolley, the rollers associated with one pair of tracks and raises the rollers associated with the intersecting pair of tracks.

Abstract: A trolley for track systems with essentially right-angled intersections is equipped with raisable and lowerable rollers which can be lowered to engage with, and raised to disengage with, one of the pairs of tracks. A common actuator (76,78) simultaneously lowers, in relation to the trolley, the rollers associated with one pair of tracks and raises the rollers associated with the intersecting pair of tracks.

Abstract: A gripper device for thin, plate-like parts, especially sheet-metal parts, is provided with a plurality of suction cups (26, 28, 30, 32) disposed on the underside of a carrier frame. The suction cups (26, 28, 30, 32) are fixed to the outer ends of four gear racks (18, 20, 22, 24) which are disposed as a cross and can be displaced longitudinally along two superimposed planes. In the center of the cross formed by the racks, mounted in a vertical axis, there is a toothed gear (46) which extends over both superimposed planes. The gear racks (18, 20, 22, 24) engage with the toothed gear (46) in pairs from diametrically opposed sides. A control rod (72) with a gear rack profile engages with the toothed gear (46) on a third plane and has an engaging device (76) at one radially external end by means of which an adjusting force can be exerted on the control rod in order to displace it in the longitudinal direction.