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OUTPUT CRANE STATION

IP.com Disclosure Number: IPCOM000040047D
Original Publication Date: 1987-Sep-01
Included in the Prior Art Database: 2005-Feb-01
Document File: 4 page(s) / 60K

Publishing Venue

IBM

Related People

Caraballo, JF: AUTHOR [+5]

Abstract

This article describes a technique for providing an efficient and fast automatic delivery of pallets to the kitting lanes in an automatic crane system. The output crane controls and monitors the output side of the flowrack system. Based on the information available in the common database and the photo-eye information collected by the programmable controller station, the crane station delivers pallets of the specified part type to the kitting lanes. The output crane control program may also elect to return a pallet of parts to the input side of the dense storage area for various reasons. These parts are returned using the return flow lane. A Parts Return message will be sent to the input crane control program for each pallet placed in the return flow lane.

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OUTPUT CRANE STATION

This article describes a technique for providing an efficient and fast automatic delivery of pallets to the kitting lanes in an automatic crane system. The output crane controls and monitors the output side of the flowrack system. Based on the information available in the common database and the photo-eye information collected by the programmable controller station, the crane station delivers pallets of the specified part type to the kitting lanes. The output crane control program may also elect to return a pallet of parts to the input side of the dense storage area for various reasons. These parts are returned using the return flow lane. A Parts Return message will be sent to the input crane control program for each pallet placed in the return flow lane. The input crane control program will then retrieve the pallet(s) and return the parts to the proper flowrack area. The output crane will automatically reject pallets and deposit them in the reject lane where a forklift truck will disperse them to a reject area.

(Image Omitted)

The output crane is primarily driven by the following kitting lane events: a.Kitting lane pallet eject This event occurs whenever a kitting lane pallet has been emptied and the operator ejects the empty pallet. b. Small parts picking-rack empty This event occurs whenever a small parts picking-rack pallet has been emptied. The above conditions (and other conditions) are detected by changes in the photo-eye status of kitting lanes and operator intervention for the small parts racks. Whenever the output crane control program detects a kitting lane pallet eject event, the following operations are performed: a. The kitting lane location record is found, and the oldest pallet record is removed from the location record pallet list. The pal

let number is then released to the pool of free pallets.

(Image Omitted)

b. Using the

part index contained in the location record, a

replacement pallet of parts is located as follows:

The location list contained in the part record is

scanned, beginning with the oldest location record in

order, to find the oldest pallet of parts which is

currently located on the output face of the flow lanes

or in the output static rack area. If a pallet cannot

be located, a part request message will be sent to the

input crane control program over the local area network

(LAN), requesting that a pallet containing the

specified part be sent via one of the express flow

lanes. Whenever the output crane control program detects a small

1

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parts picking-rack empty event, the following operations are performed: a.The output crane will remove the empty pallet from the small parts picking-rack and deposit it into one of the aisle access lanes

for manual pick-up by the fork-lift operator. b.The associated location record is found, and the oldest pallet record is removed from the location record pallet list. The

pallet number is then released to the pool of free pallets.
c.Usi...