Automated assembly line

• US 6,654,663 B1
• Filed: 10/30/2000
• Issued: 11/25/2003
• Est. Priority Date: 03/09/1998
• Status: Expired due to Fees

• Current Assignee: Pmj Automec Oyj
• Original Assignee: Pmj Automec Oyj
• Inventors: Jokela, Markku
• Primary Examiner(s): Walsh, Donald P.
• Assistant Examiner(s): Butler, Michael E
• Application Number:
  US09/623,586
• Time in Patent Office: 1,121 Days
• Field of Search: 700/230, 700/217, 700/218, 700/229, 700/228, 198/358
• US Class Current: 700/230
• CPC Class Codes: B23P 19/001 Article feeders for assembling machines screws or nuts being carried by a disposable strip or disc B25B23/045
• CPC Class Codes: B23P 21/004 the units passing two or more work-stations whilst being composed
• CPC Class Codes: B65G 37/02 Flow-sheets for conveyor combinations in warehouses, magazines or workshops

Abstract

An assembly line comprising a number of pallets (1) carrying electronic components for assembly, provided with individual RF-tags (2) containing stored product information, a main conveyor (3) in the shape of an endless loop, conveying pallets (1); assembly stations (4) spaced along the main conveyor. Each station is equipped with a reading device (6) for reading the RF-tags and a data processing apparatus controlling the work station operations, depending on the data read off the RF-tag; an automatic storage system (7) placed in the vicinity of workstations (4) comprising a number of storage devices (8), as well as transfer means (9) feeding pre-selected components from a pre-selected storage device to the assembly stations.

Claims

1. Assembly line for electronics industry, said assembly line comprising a number of pallets (1) fitted to receive components of a product to be assembled, each pallet being provided with an RF-tag (2) containing stored information about the product being assembled;

a main conveyor (3) constructed in the shape of an endless loop and fitted to convey the pallets (1);

assembly work stations (4;

4¹,4², 4³ . . . ) disposed along the main conveyor for receiving pallets from the main conveyor and carrying out assembly work operations on the product on the pallet in the framework of the working area (5) of the work station, each one of said assembly work stations being provided with a reading device (6) for reading the contents of the RF-tag before execution of the operation and a data processing apparatus for controlling the assembly work station on the basis of the data read from the RF-tag so as to cause the work station to execute a number of predetermined assembly operations, such as placing a component on at least one of the product or the pallet, wherein the assembly line comprises an automatic storage system (7) disposed in a vicinity of an assembly work station (4), said automatic storage system comprising a number of storage devices (8), and transfer means (9) disposed between the storage devices and the assembly work station for supplying a predetermined component from a predetermined storage device to the working area of the work station on the basis of the data read from the RF-tag, the transfer means (9) including a component conveyor (11) extending from a vicinity of the storage device (8) to the working area (5) of the assembly work station (4).

2. Assembly line as defined in claim 1, wherein the storage device (8) comprises a number of pallets (10) placed over each other, each carrying a number of components, and a manipulation arm (13) or the like provided with a gripping device (12) for gripping a component on a pallet and moving it onto the component conveyor (11).

3. Assembly line as defined in claim 1, further comprising a component conveyor including a carriage (14) fitted to receive and support the component;

and a guide (15) for forming a track for the carriage.

4. Assembly line as defined in claims 1, wherein the assembly work station (4¹) is a manual work station for a worker, designed for the execution of manual assembly operations on a component on a pallet (1).

5. Assembly line as defined in claim 3, wherein the work station (4³) is an assembly robot cell fitted to perform an automatic assembly operation of a product wherein the product is on a pallet (1).

6. Assembly line as defined in claim 1, wherein the assembly line comprises a side conveyor (16) disposed in the area of the assembly work station (4) and branching out from the main conveyor (3), designed to receive a pallet (1) from the main conveyor and convey it to the working area (5) of the work station for an assembly operation and to deliver the pallet back to the main conveyor.

7. Assembly line as defined in claim 5, wherein the assembly robot cell (4³) comprises a robot (18) provided with a gripping device (17) for gripping a component on the carriage (14) in the working area (5) and moving it to the product being assembled on the pallet (1).

8. Assembly line as defined in claims 2, wherein the storage device (8) comprises a shelf means (19) provided with supporters (20) on which the pallets (10) are arranged one over the other;

and an elevating gear (21) for successively moving the supporters in a vertical direction so that the pallets are moved upwards, and for moving the supporters for successive lower (10¹) and upper (10²) pallets placed over each other with respect to each other when facing the manipulation arm (13) so as to form an interspace (22) between the lower and upper pallets into which the manipulation (13) arm together with the gripping device (12) can be inserted in order to pick up a component from the lower pallet (10¹).

9. Assembly line as defined in claim 2, wherein the assembly work station (4) has been arranged to do assembly work consisting of mounting a component having several variants on a product;

and that the automatic storage system comprises a storage device (8) for each variant, so that the pallets (10) of each different storage device carry the several variants.