Browse Prior Art Database

Flat Gear Pickup Fingers

IP.com Disclosure Number: IPCOM000047763D
Original Publication Date: 1983-Dec-01
Included in the Prior Art Database: 2005-Feb-08
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Bergacs, J: AUTHOR [+3]

Abstract

This article relates generally to automated assembly lines and more particularly to a robot hand having fingers specifically adapted for picking up flat gears used in the assembly of inked ribbon cartridges. The ribbon cartridge during assembly utilizes a drive gear set which incorporates a flat gear with a .250" hole through the center. The pickup device of this article is utilized to both pick up the gear and sense whether or not the gear is present. Pickup 1 consists of a body 2 which is mounted fixedly to the turret of a robot arm (not shown) by a boss 3. Body 2 is milled out to accept a fixed finger 4 which is held in place by a screw 5. A moveable finger 6 is held in place by a screw 5. A moveable finger 6 is similarly held in a moveable holder 7.

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Flat Gear Pickup Fingers

This article relates generally to automated assembly lines and more particularly to a robot hand having fingers specifically adapted for picking up flat gears used in the assembly of inked ribbon cartridges. The ribbon cartridge during assembly utilizes a drive gear set which incorporates a flat gear with a .250" hole through the center. The pickup device of this article is utilized to both pick up the gear and sense whether or not the gear is present. Pickup 1 consists of a body 2 which is mounted fixedly to the turret of a robot arm (not shown) by a boss 3. Body 2 is milled out to accept a fixed finger 4 which is held in place by a screw 5. A moveable finger 6 is held in place by a screw 5. A moveable finger 6 is similarly held in a moveable holder 7. Moveable holder 7 is attached to a shoulder screw 8 which slides in body 2. Moveable holder 7 is spring-loaded by means of a spring in the open position and held to the desired spacing by the shoulder screw 8. Moveable holder 7 is guided by two pins 10 which maintain alignment. In the open position, dimension A is approximately 0.200" and Dimension B is approximately 0.300". When closed, Dimension B is just under the low limit of the hole tolerance in the flat gear to be picked up. In operation, the robot inserts the fixture fingers 4, 6 into the hole of a gear. The taper between A and B allows fingers 4, 6 to close. The spring tension holds the gear by friction. The position of the screw...