Method to control at least one movement of an industrial truck

• US 20040031628A1
• Filed: 06/11/2003
• Published: 02/19/2004
• Est. Priority Date: 06/14/2002
• Status: Abandoned Application

• Current Assignee: Still Wagner GmbH & Company KG
• Original Assignee: Still Wagner GmbH & Company KG
• Inventors: Meinhardt, Michael, Schiebel, Hans-Jorg, Mebert, Ralf
• Application Number:
  US10/459,404
• Publication Number:
  US 20040031628A1
• Time in Patent Office: Days
• US Class Current: 177/146
• CPC Class Codes: B66F 17/003 for fork-lift trucks

Abstract

A method is provided to control at least one movement of an industrial truck. The method includes determining the lifting height of load holding means (5), determining the weight of a lifted load, calculatiing of the position of the overall center of gravity (S) of the industrial truck, calculating a variable which is a function of the stability of the industrial truck in at least one direction, and determining the allowable scope of the movement of the industrial truck. The overall center of gravity (S) and/or the stability of the industrial truck can be calculated taking into consideration a potential elastic deformation of a lifting platform (6) of the industrial truck.

Claims

1. A method to control at least one movement of an industrial truck, comprising:

determining a lifting height of a load holding means;

determining a weight of a lifted load;

calculating a position of an overall center of gravity of the industrial truck;

calculating a variable which is a function of the stability of the industrial truck in at least one direction; and

determining an allowable scope of at least one movement of the industrial truck.

2. The method as claimed in claim 1, wherein at least one of the stability and the position of the overall center of gravity of the industrial truck is calculated taking into consideration a potential elastic deformation of at least one component of the industrial truck.

3. The method as claimed in claim 1, wherein at least one of the stability and the position of the overall center of gravity of the industrial truck is calculated taking into consideration a potential elastic deformation of a lifting platform of the industrial truck.

4. The method as claimed in claim 1, wherein the at least one movement includes the lifting movement of the load holding means.

5. The method as claimed in claim 4, wherein elevation of the load holding means is prevented if the calculated stability in at least one direction is less than a required stability in the same direction.

6. The method as claimed in claim 1, wherein the at least one movement includes the speed of travel of the industrial truck in a forward and/or reverse direction.

7. The method as claimed in claim 6, wherein an allowable speed of travel in the forward and/or reverse direction is determined as a function of a physically possible braking acceleration of the industrial truck in the corresponding direction.

8. The method as claimed in claim 6, wherein an allowable speed of travel in the forward and/or reverse direction is determined as a function of an allowable braking acceleration of the industrial truck in the corresponding direction.

9. The method as claimed in claim 6, wherein the allowable braking acceleration of the industrial truck is determined as a function of the position of the stability of the industrial truck.

10. The method as claimed in claim 6, wherein the allowable speed of travel in the forward and/or reverse direction is determined as a function of a current steering angle of a steered wheel of the industrial truck.

11. The method as claimed in claim 1, wherein the at least one movement includes a movement of the load holding means relative to a lifting platform of the industrial truck.

12. An industrial truck including a control device for the performance of the method as claimed in claim 1.

13. The industrial truck as claimed in claim 12, wherein the industrial truck is configured so that it can travel with a raised load.

14. The industrial truck as claimed in claim 12, wherein the industrial truck is a high shelf stacker or a high shelf order picker.

15. The method as claimed in claim 2, wherein at least one of the stability and the position of the overall center of gravity of the industrial truck is calculated taking into consideration a potential elastic deformation of a lifting platform of the industrial truck.

16. The method as claimed in claim 7, wherein an allowable speed of travel in the forward and/or reverse direction is determined as a function of an allowable braking acceleration of the industrial truck in the corresponding direction.

17. The method as claimed in claim 7, wherein the allowable braking acceleration of the industrial truck is determined as a function of the position of the stability of the industrial truck.

18. The method as claimed in claim 7, wherein the allowable speed of travel in the forward and/or reverse direction is determined as a function of a current steering angle of a steered wheel of the industrial truck.