Article transport device

• US 20070034477A1
• Filed: 08/04/2006
• Published: 02/15/2007
• Est. Priority Date: 08/10/2005
• Status: Active Grant

• Current Assignee: Daifuku Company Limited
• Original Assignee: Daifuku Company Limited
• Inventors: Inui, Yoshitaka
• Granted Patent: US 7,648,018 B2
• Time in Patent Office: Days
• US Class Current: 198/370.30
• CPC Class Codes: H01L 21/67715 Changing the direction of the conveying path
• CPC Class Codes: H01L 21/6773 Conveying cassettes, containers or carriers
• CPC Class Codes: H01L 21/67736 Loading to or unloading from a conveyor

Abstract

An article transport device comprises an endless revolving body that is configured to move along a cyclic path in a substantially horizontal direction; a plurality of article supports each of which supports an article, wherein the article supports move together with the endless revolving body with the supports spaced apart from each other in a traveling direction; a support mechanism for supporting the article supports to the endless revolving body such that the article supports can move between a transport position adjacent the endless revolving body and an away position spaced apart from the transport position; and a guide mechanism for causing at least some of the article supports to move from the transport position to the away position and to move from the away position to the transport position, at an article delivering location or an article receiving location along the cyclic path of the endless revolving body.

Claims

1. An article transport device, comprising:

an endless revolving body that is configured to move along a cyclic path in a substantially horizontal direction;

a plurality of article supports each of which supports an article, wherein the article supports move together with the endless revolving body with the supports spaced apart from each other in a traveling direction;

support means for supporting the article supports to the endless revolving body such that the article supports can move between a transport position adjacent the endless revolving body and an away position spaced apart from the transport position; and

guide means for causing at least some of the article supports to move from the transport position to the away position and to move from the away position to the transport position, at an article delivering location or an article receiving location along the cyclic path of the endless revolving body.

2. The article transport device according to claim 1, further comprising:

an article-receiving placing portion, installed at the article delivering location, that receives an article from the article support that is positioned at the away position at the article delivering location;

wherein the support means is configured to vertically movably support the article support with respect to the endless revolving body in order to deliver an article, and

the guide means causes the article support that is positioned at the away position at the article delivering location to vertically move such that an article supported by the article support is delivered to the article-receiving placing portion, by lowering the article from a position above the article-receiving placing portion.

3. The article transport device according to claim 2,

wherein the article-receiving placing portion has article-placing transport means for transporting an article at the article delivering location in a substantially horizontal direction toward an article take-out location, and for placing a plurality of articles between the article delivering location and the article take-out location.

4. The article transport device according to claim 1,

wherein the support means has first means for vertically movably supporting the article support, and second means for supporting the first means in a movable manner with respect to the endless revolving body such that the article support is supported to be movable between the transport position and the away position with respect to the endless revolving body.

5. The article transport device according to claim 3,

wherein the support means has first means for vertically movably supporting the article support, and second means for supporting the first means in a movable manner with respect to the endless revolving body such that the article support is supported to be movable between the transport position and the away position with respect to the endless revolving body.

6. The article transport device according to claim 4,

wherein the guide means has a movement guide member that guides the article support such that the article support is moved between the transport position and the away position, and an elevation guide member that guides the article support such that the article support positioned at the away position at the article delivering location is vertically moved.

7. The article transport device according to claim 1, further comprising:

article delivering means installed at the article receiving location, for delivering an article supported by an article-delivering placing portion to the article support that is positioned at the away position at the article receiving location,

wherein the article delivering means causes the article-delivering placing portion to move in synchronization with movement of the article support that is positioned at the away position at the article receiving location, and the article-delivering placing portion to vertically move such that an article supported by the article-delivering placing portion is delivered to the article support, by lowering the article from a position above the article support that is positioned at the away position at the article receiving location.

8. The article transport device according to claim 4,

wherein the second means has at least one first link arm that is pivotably attached to the endless revolving body, and at least one second link arm that is pivotably attached to the first link arm.

9. The article transport device according to claim 8,

wherein the first means has a base member that is supported by the second link arm, and at least one elevation link arm having one end supported by the base member pivotably in the vertical direction and the other end supported by the article support pivotably in the vertical direction.

10. The article transport device according to claim 6,

wherein the elevation guide member has an elevation rail, and the elevation rail has an upward portion that is inclined upward, a flat middle portion, and a downward portion that is inclined downward in a side view.

11. The article transport device according to claim 1,

wherein the endless revolving body is driven by a linear motor having magnets and coils.

12. The article transport device according to claim 1,

wherein the article support has, on a surface thereof, a positioning member extending in the vertical direction for fixing the position of an article.

13. An article transport device, comprising:

a plurality of vehicles that are configured to move along a closed path;

an article support supported by at least some of the vehicles, for supporting an article;

a link mechanism for supporting the article support with respect to the vehicle such that the article support can move between a transport position adjacent corresponding one of the vehicles and an away position spaced apart from the transport position; and

a guide that causes the article support to move between the away position and the transport position.

14. The article transport device according to claim 13,

wherein the plurality of vehicles are coupled to each other so as to form an endless body.

15. The article transport device according to claim 13, further comprising:

a receiving member that has a support face disposed so as to receive an article supported by the article support when the article support is at the away position.

16. The article transport device according to claim 15,

wherein the receiving member is a roller conveyer having a plurality of rollers, and circumferential faces of the plurality of rollers form the support face.

17. The article transport device according to claim 13, further comprising:

an elevation link that is provided between the link mechanism and the article support, and that allows the article support to be vertically displaced with respect to the link mechanism.

18. The article transport device according to claim 15, further comprising:

an inclined face provided on an area of the receiving member, for raising an upper face of the article support to a position above the support face.

19. The article transport device according to claim 13, further comprising:

a linear motor mechanism having magnets and coils, for driving the vehicles.

20. The article transport device according to claim 13,

wherein the guide is a guide rail that receives a guide roller that is operatively coupled into the article support.