Control device for loading and unloading mechanism
US4520443A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Mar 31, 1982 |
| Grant date | May 28, 1985 |
| Priority date | — |
| Expiry date | Mar 31, 2002 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66F9/24
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A control device for loading and unloading mechanism adapted to be incorporated in a fork lift truck comprises a sensor unit 100 including a lifting height sensor 102, a tilting angle sensor 104, and a load sensor 106, a control unit 200 comprising a control command producing circuit 240 constituted by a microcomputer 230 producing a control command on the basis of comparing calculation between the output of the sensor unit 100 and the concerned data stored in the microcomputer 230. The control device further comprises actuators 322, 324 including servomotor driving circuit therein responsive to the control command fed from the control unit 200, and a hydraulic pressure driving circuit 340 for hydraulically controlling a lift cylinder 346 and a tilt cylinder 348 in accordance with the corresponding output of each actuator, respectively. The control device is capable of effecting a automatic running attitude control due to the data stored in the microcomputer 230. The control device further makes it possible to automatically effect a series of sequential loading and unloading work including a lifting height operation and a tilting angle control. Preferably, the control device compri…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.