Suction gripper apparatus

1. A suction gripper apparatus with a suction head which is mounted with at least one elastic mounting member on a working head of an actuation device, the suction head having an elastic suction cup which possesses a suction body and a suction lip forming an open edge portion of the suction body and running in a suction plane, characterised in that the suction head possesses a retaining plate connected to the suction cup and surrounding it like a ring and having a flat contact surface running in a contact plane parallel to the suction plane.

2. The suction gripper apparatus as claimed in claim 1 , characterised in that the suction plane and the contact plane run perpendicularly to a suction direction of the suction head, which is aligned along a longitudinal axis of the suction head.

3. The suction gripper apparatus as claimed in claim 1 , characterised in that in a non-pressurised rest state of the suction cup, the suction lip lies in the contact plane or projects above it opposite the suction direction.

4. The suction gripper apparatus as claimed in claim 1 , characterised in that the suction lip is circular or oval and the retaining plate has a circular or oval opening, the diameter or size of which is the same as or greater than an outer diameter of the suction lip.

5. The suction gripper apparatus as claimed in claim 1 , characterised in that the suction body is attached at an end opposite the suction lip to a connector part which is fixed to the retaining plate.

6. The suction gripper apparatus as claimed in claim 1 , characterised in that in the region of the contact surface, the retaining plate consists of a material or is coated in that region with a material that has a high coefficient of friction, especially rubber.

7. The suction gripper apparatus as claimed in claim 1 , characterised in that the suction head is mounted on the working head of the actuation device with a plurality of elastic mounting members, with a first end of each mounting member being connected to the suction head and a second end of each mounting member being connected to the working head.

8. The suction gripper apparatus as claimed in claim 7 , characterised in that the mounting members are coil springs.

9. The suction gripper apparatus as claimed in claim 8 , characterised in that three mounting members in the form of coil springs are provided, the first ends of which are located at points of an equilateral triangle at the retaining plate .

10. The suction gripper apparatus as claimed in claim 9 , characterised in that the first ends of the coil springs diverge away from the retaining plate , and that the second ends of the coil springs diverge away from the working head.

11. The suction gripper apparatus as claimed in claim 8 , characterised in that second ends of the coil springs are located at corners of an equilateral triangle at the working head.

12. The suction gripper apparatus as claimed in claim 1 , characterised in that the suction head is connected to the working head by a non-expandable tension member.

13. The suction gripper apparatus as claimed in claim 1 , characterised in that the suction body of the suction cup has alternately converging and diverging frustoconical portions.

14. The suction gripper apparatus as claimed in claim 1 , characterised in that a suction head or a number of adjacent suction heads are attached to one or a common actuation device.

15. The suction gripper apparatus as claimed in claim 14 , characterised in that the actuation device comprises a pneumatically operated piston/cylinder unit, to which a constant pressure, which can be limited to a predetermined value, is applied independently of any extension position.

16. The suction gripper apparatus as claimed in claim 1 , characterised in that one or more adjacent further suction gripper apparatuses with respective suction heads and actuation means are provided, wherein all the actuation means are disposed on a common gripper frame.

17. The suction gripper apparatus as claimed in claim 1 , characterised in that the suction cup is configured to act passively or can be connected in a controlled manner to a vacuum source.