AS/RS lift having vertically-aligned dual carriages

Patent metadata

Field	Value
Publication number	US-11873163-B2
Application number	US-202117524238-A
Country	US
Kind code	B2
Filing date	Nov 11, 2021
Priority date	Jan 25, 2017
Publication date	Jan 16, 2024
Grant date	Jan 16, 2024

Abstract

A material handling system has a vertical lift two vertically aligned carriages that are independently positionable on a vertical support structure by respective drive systems. A processor subsystem selects one of the two carriages to move an article from at least one in-feed conveyor to a selected level of an automated storage and retrieval system (AS/RS). The processor subsystem concurrently positions the other carriage to avoid a collision.

First claim

What is claimed is:

1. A material handling system comprising:
a storage rack having vertically-spaced levels;
a vertical lift having a vertical support structure positioned proximate to the storage rack and having a vertically aligned first carriage and second carriage independently positionable along the vertical support structure;
at least one vertical drive system, wherein the at least one vertical drive system is configured to position at least one of the first carriage and the second carriage at selected levels of the vertical support structure; and
a processor subsystem in communication with the at least one vertical drive system to:
selectively position the first carriage and the second carriage at respective selective levels along the vertical support structure, wherein the at least one vertical drive system comprises a drive belt on a front side of the vertical support structure.

2. The material handling system of claim 1 , further comprising a shuttle vehicle that services a vertically-spaced level of the storage rack.

3. The material handling system of claim 1 , wherein each vertically spaced level defines a plurality of storage locations accessible from an adjacent aisle.

4. The material handling system of claim 1 , further comprising at least one infeed conveyor and at least one out-feed conveyor adjacent to the vertical support structure that are serviced by a selected one of the first carriage or the second carriage.

5. The material handling system of claim 1 , wherein:
a first vertical portion of the vertical support structure comprises an overlapping zone and a first exclusive zone above the overlapping zone; and
a second vertical portion of the vertical support structure comprises the overlapping zone and a second exclusive zone below the overlapping zone.

6. The material handling system of claim 5 , further comprising:
at least one in-feed conveyor and at least one out-feed conveyor adjacent to a level of the first exclusive zone and serviced by the first carriage; and
at least one in-feed conveyor and at least one out-feed conveyor adjacent to a level of the second exclusive zone and serviced by the second carriage.

7. The material handling system of claim 5 , wherein:
the first vertical portion is coextensive with the first exclusive zone and spaced apart from the second vertical portion that is coextensive with the second exclusive zone; and
the processor subsystem is further configured to position the first carriage within the first exclusive zone and selectively position the second carriage within the second exclusive zone to prevent collision.

8. The material handling system of claim 1 , further comprising: a pickup and deposit (P/D) station on a selected level and aisle of the storage rack.

9. A vertical lift comprising:
a vertical support structure;
a first carriage and second carriage received for vertical movement along the vertical support structure, wherein each of the first carriage and the second carriage are independently positionable along a respective first vertical portion and a second vertical portion of the vertical support structure, wherein at least a portion of the first vertical portion and the second vertical portion of the vertical support structure overlap;
a dual vertical drive system configured to position the first carriage at selected levels within the first vertical portion of the vertical support structure and the second carriage at selected levels within the second vertical portion of the vertical support structure; and
a processor subsystem in communication with the dual vertical drive system to:
selectively position the first carriage and the second carriage at respective selective levels along the vertical support structure to avoid collision with each other, wherein the dual vertical drive system comprises drive belts on a front side of the vertical support structure laterally offset with each other.

10. The vertical lift of claim 9 , wherein:
the first vertical portion comprises an overlapping zone and a first exclusive zone above the overlapping zone; and
the second vertical portion comprises the overlapping zone and a second exclusive zone below the overlapping zone.

11. The vertical lift of claim 10 , wherein the first carriage and the second carriage are positionable to service at least one in-feed conveyor and at least one out-feed conveyor that are adjacent to the vertical support structure.

12. The vertical lift of claim 10 , wherein:
the first carriage is positionable to service at least one in-feed conveyor and at least one out-feed conveyor that are adjacent to a level of the first exclusive zone; and
the second carriage is positionable to service at least one in-feed conveyor and at least one out-feed conveyor that are adjacent to a level of the second exclusive zone.

13. The vertical lift of claim 10 , wherein:
the first vertical portion is coextensive with the first exclusive zone and spaced apart from the second vertical portion that is coextensive with the second exclusive zone; and
the processor subsystem is further configured to position the first carriage within the first exclusive zone and selectively position the second carriage within the second exclusive zone to prevent collision.

14. The vertical lift of claim 9 , wherein the first carriage and the second carriage comprise at least motor driven roller (MDR).

15. A method comprising:
selecting a first carriage of a vertical lift to transfer an article, wherein the vertical lift comprises a vertical support structure having a vertically aligned first carriage and a vertically aligned second carriage independently positionable along respective vertical portions of the vertical support structure, wherein at least a portion of the vertical portions of the vertical support structure overlap;
positioning the first carriage at selected levels within the vertical portions of the vertical support structure to position the first carriage to transfer the article; and
positioning the second carriage at selected levels within the vertical portions of the vertical support structure to concurrently position the second carriage out of a path of the first carriage.

16. The method of claim 15 , wherein transferring the article comprises receiving the article on the first carriage from an in-feed conveyor.

17. The method of claim 15 , wherein transferring the article comprises receiving the article on the first carriage from the storage rack.

18. The method of claim 15 , wherein transferring the article comprises depositing the article from the first carriage on an in-feed conveyor.

19. The method of claim 15 , wherein transferring the article comprises depositing in the article from the first carriage to the storage rack.

20. The method of claim 15 , further comprises selecting at least one first carriage or the second carriage to receive the article at a selected level and to deposit the article at an out-feed conveyor.

Assignees

• Intelligrated Headquarters Llc

Inventors

• Schack Douglas K
• Buerkle Ralf
• Cleary Jonathon
• Lingamfelter Charles Christopher

Classifications

• B65G1/06 Primary

  with means for presenting articles for removal at predetermined position or level (B65G1/12 takes precedence) · CPC title

• B65G1/04 Primary

  mechanical · CPC title

• B65G1/0492

  with cars adapted to travel in storage aisles · CPC title

• B65G1/1373

  for fulfilling orders in warehouses · CPC title

• G05B19/41865 Primary

  characterised by job scheduling, process planning, material flow · CPC title