Workpiece i.e. sheet plate, gripping and retaining device, has energy generator, and piston slidably supported between rest position and operating position in cylinder, where sensors detect position and presence of workpiece and piston

摘要

#CMT# #/CMT# The device (10) has a cylinder (20) arranged in a housing (16). A piston (22) forms permanent magnets (26), and is pivoted between a rest position and an operating position in the cylinder. The piston lies or lies close to a cylinder base in the operating position. A workpiece (12) is contacted by the base. An energy generator, an energy storage (52) and sensors (38, 40, 42) are provided, where the generator is a solar cell, induction generator, heat or vibration transducer, piezo element or a turbine. The sensors detect position and presence of the workpiece and the piston. #CMT# : #/CMT# The sensors can be selected from the group consisting of a contactless or tactile sensor, switch, temperature sensor, pressure sensor, flow sensor, capacitive sensor or inductive sensor. #CMT#USE : #/CMT# Device for gripping and retaining of a workpiece i.e. sheet plate, by pneumatically movable permanent magnets. #CMT#ADVANTAGE : #/CMT# The sensors determine whether the workpiece is gripped by the device or not in a simple manner. The utilization of the energy generator and the energy storage eliminates the need for an external power supply in the device and reduces wiring cost of the device. #CMT#DESCRIPTION OF DRAWINGS : #/CMT# The drawing shows a longitudinal sectional view of a device for gripping and retaining a workpiece. 10 : Workpiece gripping and retaining device 12 : Workpiece 16 : Housing 20 : Cylinder 22 : Piston 26 : Permanent magnets 38, 40, 42 : Sensors 52 : Energy storage.