Movable step for a materials handling vehicle

• US 7,740,259 B2
• Filed: 11/03/2006
• Issued: 06/22/2010
• Est. Priority Date: 02/03/2006
• Status: Active Grant

• Current Assignee: Crown Equipment Corporation
• Original Assignee: Crown Equipment Corporation
• Inventors: Graf, Markus, Pollack, Jay G., Kraimer, James V.
• Primary Examiner(s): Dickson; Paul N
• Assistant Examiner(s): Evans; Bryan A
• Application Number:
  US11/556,318
• Publication Number:
  US 20070182121A1
• Time in Patent Office: 1,327 Days
• Field of Search: 280/166, 280/169, 280/163, 280/164.1, 280/748, 280/751, 280/43.12, 296/190.01, 296/190.03, 296/190.08, 296/190.11, 180/271, 180/286, 180/287
• US Class Current: 280/166
• CPC Class Codes: B66F 9/07545 Overhead guards

Abstract

A materials handling vehicle is provided comprising a frame including an operator compartment having at least one entrance and a floorboard. The vehicle further comprises at least one step capable of being positioned across the entrance a spaced distance from the floorboard such that an operator may stand on the step when the step is positioned across the entrance to gain access to an elevated storage location.

Claims

1. A materials handling vehicle comprising:

a frame comprising an operator compartment having at least one entrance and a floorboard; and

at least one step capable of being positioned across said entrance a spaced distance from said floorboard such that an operator may stand on said step when said step is positioned across said entrance to gain access to an elevated storage location, wherein said step is movable between a deployed position where said step is positioned across said entrance and a stowed position where said step is positioned in a location so as not to block said entrance into and exit from said operator compartment, said step being in a down position when deployed and an up position when stowed;

a biasing element for assisting an operator in moving said step from the down position to the up position;

at least one hinge mechanism coupled to said at least one step to allow said step to pivot between the deployed and stowed positions; and

wherein said operator compartment further comprises first and second substantially vertical and opposing walls, and further comprising a stop coupled to said first wall, said step being pivotably coupled at a first end to said second wall, and a second end of said step engaging said stop when said step is moved to the down position.

3. The materials handling vehicle as set forth in claim 1, further comprising a locking mechanism associated with said second wall for releasably locking said step when said step has been moved to the up position.

4. The materials handling vehicle as set forth in claim 1, further comprising:

a drive wheel coupled to said frame;

a motor coupled to said drive wheel for effecting rotation of said drive wheel;

a controller for controlling the operation of said drive motor; and

at least one sensor associated with said step, said sensor generating a signal to said controller when said step is in a travel state, said controller providing a drive signal to said motor only when a travel state signal is being generated by said sensor.

5. The materials handling vehicle as set forth in claim 1, wherein said step is positioned above said floorboard a distance of from about 250 mm to about 450 mm.

6. The materials handling vehicle as set forth in claim 1, wherein said operator compartment comprises a walk-through operator compartment having first and second entrances, and said at least one step comprises first and second steps, said first step being adapted to be positioned across said first entrance a spaced distance from said floorboard and said second step being adapted to be positioned across said second entrance a spaced distance from said floorboard, wherein an operator may stand on one of said first and second steps when said one step is positioned across a corresponding one of said first and second entrances to gain access to the elevated storage location.

7. The materials handling vehicle as set forth in claim 6, wherein said first step is movable between a deployed position where said first step is positioned across said first entrance and a stowed position where said first step is positioned in a location so as not to block said first entrance into said operator compartment, and said second step is movable between a deployed position where said second step is positioned across said second entrance and a stowed position where said second step is positioned in a location so as not to block said second entrance into said operator compartment.

17. The materials handling vehicle as set out in claim 1, wherein said step extends across the entire extent of said entrance when in a deployed position.

2. A materials handling vehicle comprising:

a frame comprising an operator compartment having at least one entrance and a floorboard; and

at least one step capable of being positioned across said entrance a spaced distance from said floorboard such that an operator may stand on said step when said step is positioned across said entrance to gain access to an elevated storage location, wherein said step is movable between a deployed position where said step is positioned across said entrance and a stowed position where said step is positioned in a location so as not to block said entrance into and exit from said operator compartment and said step slides between the deployed and stowed positions.

8. A materials handling vehicle comprising:

a frame comprising an operator compartment having at least one entrance and a floorboard;

a drive wheel coupled to said frame;

a motor coupled to said drive wheel for effecting rotation of said drive wheel;

a controller for controlling the operation of said motor;

at least one step associated with said frame capable of being moved between a deployed position to allow an operator to stand on said step and gain access to an elevated storage location and a stowed position where said step is stored in an out-of-the-way location; and

at least one sensor associated with said step, said sensor generating a signal to said controller when said step is in a travel state, said controller providing a drive signal to said motor only when a travel state signal is being generated by said sensor, wherein said step is in said travel state when said step is in said stowed position.

9. The materials handling vehicle as set forth in claim 8, wherein said step slides between the deployed and stowed positions.

10. The materials handling vehicle as set forth in claim 8, further comprising at least one hinge mechanism coupled to said at least one step to allow said step to pivot between the deployed and stowed positions.

11. The materials handling vehicle as set forth in claim 10, wherein said step is in a down position when deployed and an up position when stowed and further comprising a biasing element for assisting an operator in moving said step from the down position to the up position.

12. The materials handling vehicle as set forth in claim 11, wherein said operator compartment further comprises first and second substantially vertical and opposing walls, and further comprising a stop coupled to said first wall, said step being pivotably coupled at a first end to said second wall, and a second end of said step engaging said stop when said step is moved to the down position.

13. The materials handling vehicle as set forth in claim 12, further comprising a locking mechanism associated with said second wall for releasably locking said step when said step has been moved to the up position.

14. The materials handling vehicle as set forth in claim 8, wherein said step comprises a camming surface and said at least one sensor comprises a microswitch which is actuated by said camming surface.

15. The materials handling vehicle as set forth in claim 8, wherein said at least one step comprises first and second steps, said first step being adapted to be moved between a deployed position to allow an operator to stand on said first step and gain access to an elevated storage location and a stowed position where said first step is stored in an out-of-the-way location, and said second step being adapted to be moved between a deployed position to allow an operator to stand on said second step and gain access to an elevated storage location and a stowed position where said second step is stored in an out-of-the-way location.

16. The materials handling vehicle as set forth in claim 8, wherein said step comprises a flag and said at least one sensor comprises a proximity sensor which is actuated by said flag.

18. A materials handling vehicle comprising:

a frame comprising an operator compartment having at least one entrance and a floorboard;

a drive wheel coupled to said frame;

a motor coupled to said drive wheel for effecting rotation of said drive wheel;

a controller for controlling the operation of said motor;

at least one step associated with said frame capable of being moved between a deployed position to allow an operator to stand on said step and gain access to an elevated storage location and a stowed position where said step is stored in an out-of-the-way location; and

at least one sensor associated with said step, said sensor generating a signal to said controller when said step is in a travel state, said controller providing a drive signal to said motor only when a travel state signal is being generated by said sensor, wherein said step is in said travel state when said step is in said deployed position and not in use by an operator applying a predefined force and said step is not in said travel state when said step is in said deployed position and is in use by an operator applying a predefined force.