Method and apparatus for automatically loading and unloading piece goods

• US 6,588,574 B2
• Filed: 04/12/2001
• Issued: 07/08/2003
• Est. Priority Date: 04/13/2000
• Status: Expired due to Term

• Current Assignee: Grenzebach Maschinenbau GmbH (Rudolf Grenzebach,)
• Original Assignee: ABB Patent GmbH (ABB Limited)
• Inventors: Nagel, Günther, Koini, Martin
• Primary Examiner(s): Bidwell, James R.
• Application Number:
  US09/833,350
• Publication Number:
  US 20010050213A1
• Time in Patent Office: 817 Days
• Field of Search: 198/339.1, 198/341.01, 198/341.02, 198/341.03, 901/7, 901/47
• US Class Current: 198/341.01
• CPC Class Codes: B25J 15/00 Gripping heads and other end effectors grippers used in machine tools B23Q7/04; gripping members fitted on cranes B66C1/42, B66C1/44; gripping means used in the manufacture of semiconductors H01L21/68707; gripping means used for mounting electrical components H05K13/04
• CPC Class Codes: B65D 88/546 Devices for loading or unloading and forming part of the container, e.g. rollers, conveyors loading or unloading vehicles B65G67/20
• CPC Class Codes: B65G 17/345 the surfaces being equipped with a conveyor

Abstract

A method and an apparatus for automatically loading and unloading piece goods of different shapes, consistencies and masses in a permanently installed conveying system. The relevant piece goods are picked up automatically by a remote controlled apparatus, by the piece goods being gripped by friction by the apparatus and moved onto a pick-up platform belonging to the apparatus. Moreover, the piece goods, after being picked up on the pick-up platform, are secured by force and/or shape against slipping off or falling down until they are unloaded, and the loaded goods being put down automatically by the apparatus at the intended location.

Claims

1. A method for automatically loading and unloading piece goods of different shapes, consistencies and masses to/from a permanently installed conveying system, which comprises the steps of:

providing a-remote-controlled conveyed-goods pick-up device for automatically picking up the piece goods, the remote-controlled conveyed-goods pick-up device having a pick-up platform with a conveyor belt and side walls;

positioning the remote-controlled conveyed-goods pick-up device in a conveying path of the conveying system by a robot;

moving the piece goods from the conveying system onto a pick-up platform of the remote-controlled conveyed-goods pick-up device by friction;

securing the piece goods, after being picked up on the pick-up platform, by at least one of force and shape against slipping off and falling down until unloading the piece goods; and

putting down automatically the piece goods by the remote-controlled conveyed-goods pick-up device at an intended location.

2. The method according to claim 1, which comprises securing the pieces goods loaded on the pick-up platform to the pick-up platform by associated lateral bounding devices.

3. The method according to claim 1, which comprises securing the piece goods loaded on the pickup platform to the pick-up platform by an adjustable lateral bounding device.

4. An apparatus for automatically loading and unloading piece goods of different shapes, consistencies and masses to/from a permanently installed conveying system, comprising:

a robot having a carrying arm to be moved along several axes and being formed from at least two parts and having a free end; and

a remote-controlled conveyed-goods pick-up device disposed at said free end of said carrying arm for automatically picking up the piece goods, said remote controlled conveyed-goods pick-up device having a pick-up platform with a conveyor belt and side walls, said conveyor belt enclosed by said side walls on at least two sides running transversely with respect to a conveying direction of said conveyor belt.

5. The apparatus according to claim 4, wherein said conveyor belt is driven bidirectionally.

6. The apparatus according to claim 4, wherein said conveyor belt has a surface with profiling running transversely with respect to the conveying direction of said conveyor belt.

7. The apparatus according to claim 4, wherein said pick-up platform has deflection rollers deflecting said conveyor belt and said deflection rollers having a diameter between 8% and 15% of a width of said conveyor belt.

8. The apparatus according to claim 7, wherein said diameter of said deflection rollers is 10% of said width of said conveyor belt.

9. The apparatus according to claim 4, wherein said conveyor belt has one of a limit switch and an end stop in each direction.

10. The apparatus according to claim 6, wherein said conveyor belt has a thickness of at least 1 mm and said profiling has a profile height extending above said thickness of said conveyor belt.

11. The apparatus according to claim 4, wherein said conveyor belt has a width and a length of at least 1.3 times said width.

12. The apparatus according to claim 4, wherein said side walls enclosing said pick-up platform are disposed such that said side walls can be moved.

13. The apparatus according to claim 12, wherein a distance between said side walls enclosing said pick-up platform is adapted to a dimension of relevant conveyed goods.

14. The apparatus according to claim 4, including proximity sensors and a control device connected to said proximity sensors, said proximity sensors are associated with and monitor said pick-up platform.

15. The apparatus according to claim 14, including a video monitoring system for monitoring an operating sequence of said conveyed-goods pick-up and is connected to said control device.

16. The apparatus according to claim 4, wherein said conveyor belt is an endless belt.

17. The apparatus according to claim 4, wherein said conveyed-goods pick-up and said robot are to be disposed in an automatic conveying system for the piece goods, said conveyed-goods pickup performs an automatic loading and unloading of conveyed goods of different shapes, consistencies and masses into and from baggage trolleys which are disposed beside the automatic conveying system.

18. The apparatus according to claim 10, wherein said length is 450 mm.