Method and apparatus for controlling the shuttle of a storage and retrieval machine
US5091685A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1989 |
| Grant date | Feb 25, 1992 |
| Priority date | — |
| Expiry date | Oct 19, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66F9/0755
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A shuttle control for a storage and retrieval machine has a supervisory control mounted on the base of the storage and retrieval machine and a shuttle control mounted on the carriage of the storage and retrieval machine. The supervisory control receives shuttle operating commands and information signals and provides operating instruction signals for the shuttle to the shuttle control. The shuttle control receives the operating instruction signals from the supervisory control, produces operating information signals to the supervisory control, and controls the operation of a shuttle motor drive. A circuit having sliding contactors moving with the carriage on vertical slide bars mounted on the mast transmits operating instruction signals and information signals between the supervisory control and the shuttle control at a maximum transmission rate limited by the problems of transmitting the signals through the sliding contactors. Sensors mounted on the carriage of the storage and retrieval machine produce shuttle operating condition indicating signals to the shuttle control at a transmission rate faster that the maximum transmission rate of the circuit. The indicating signals are used …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.