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Accurate Positioning of Material Handler

IP.com Disclosure Number: IPCOM000038926D
Original Publication Date: 1987-Mar-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Hardcastle, B: AUTHOR [+2]

Abstract

Accurate final positioning of a material handler for removing and inserting materials from and into rack storage bins is achieved by using an individual upright as a target for a pair of optical proximity sensors to position the handler alongside a selected bin and using the same upright as a target for another pair of optical proximity sensors to position a handling part extended into the selected bin. The material handler 1 comprises a carriage 2, movable linearly along rails (not shown) alongside a matrix of storage bins formed of uprights 3 and 4 and horizontals 5. On the carriage 2 is a vertical post 6 up and down which is movable an arm support 7. Fork arms 8 are extendable from arm support 7 into a storage bin.

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Accurate Positioning of Material Handler

Accurate final positioning of a material handler for removing and inserting materials from and into rack storage bins is achieved by using an individual upright as a target for a pair of optical proximity sensors to position the handler alongside a selected bin and using the same upright as a target for another pair of optical proximity sensors to position a handling part extended into the selected bin. The material handler 1 comprises a carriage 2, movable linearly along rails (not shown) alongside a matrix of storage bins formed of uprights 3 and 4 and horizontals 5. On the carriage 2 is a vertical post 6 up and down which is movable an arm support 7. Fork arms 8 are extendable from arm support 7 into a storage bin. The carriage 2 carries a pair of optical proximity sensors 9 and 10, whose beams are parallel, normal to the axis of movement of the carriage and separated by the width of a bin upright 3. One of the fork arms 8 carries another pair of optical proximity sensors 11 and 12 at the end nearest the post 6. The beams of these sensors are parallel, normal to the axis of extension of the fork arms and separated by the width of a bin upright 3. The bin uprights are of a constant square cross-section and aligned parallel with the post 6. In operation, a movement controller directs the carriage 2 to a position close to that of the bins into which the fork arms are to be inserted. Final movement is continued slowly until...