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Mechanical Gripper With Automatic Release

IP.com Disclosure Number: IPCOM000043104D
Original Publication Date: 1984-Jul-01
Included in the Prior Art Database: 2005-Feb-04
Document File: 2 page(s) / 32K

Publishing Venue

IBM

Related People

Smith, GM: AUTHOR

Abstract

A mechanical gripper for pick-up and release of a part with an upwardly extending thin side or edge portion has a U-shaped body for lowering over the side or edge and a spring mechanism which automatically clips under the part so as to retain it in place when the edge is fully inserted in the U-shaped body. On placement of the part at a receiving station, a pin at the station contacts the spring mechanism as the gripper is lowered and moves the mechanism out of engagement with the part. During withdrawal of the gripper, the pin prevents the spring mechanism from re-engaging the part so that it is left behind at the release station. Fig. 1 shows a gripper with such a U-shaped body 1 after it has been lowered onto the thin edge 2 of a typical part 3 located on a fixture base 4 at a pick-up station.

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Mechanical Gripper With Automatic Release

A mechanical gripper for pick-up and release of a part with an upwardly extending thin side or edge portion has a U-shaped body for lowering over the side or edge and a spring mechanism which automatically clips under the part so as to retain it in place when the edge is fully inserted in the U-shaped body. On placement of the part at a receiving station, a pin at the station contacts the spring mechanism as the gripper is lowered and moves the mechanism out of engagement with the part. During withdrawal of the gripper, the pin prevents the spring mechanism from re-engaging the part so that it is left behind at the release station. Fig. 1 shows a gripper with such a U-shaped body 1 after it has been lowered onto the thin edge 2 of a typical part 3 located on a fixture base 4 at a pick-up station. The spring mechanism 5 is attached to the side of the body and is designed to clip under flange 6 of the part when its side has been fully inserted into the U-shaped body. A recess 7 is provided in the fixture base at the pick-up station to accommodate the free end of the spring mechanism which, in this example, extends below the lower surface of the part. In order to prevent inadvertent sliding of the part in the gripper as it is moved, compliant friction pads 8 (one shown) are provided within the body, as shown. Fig. 2 shows the gripper after it has lowered the part onto the fixture base at a release station. A vertical pin 9 i...