Apparatus for singulating parts

• US 5,230,432 A
• Filed: 10/15/1991
• Issued: 07/27/1993
• Est. Priority Date: 10/15/1991
• Status: Expired due to Fees

• Current Assignee: Freescale Semiconductor, Inc. (NXP Semiconductors NV)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Sugai, Maureen
• Primary Examiner(s): Hajec, Donald T.
• Application Number:
  US07/775,391
• Time in Patent Office: 651 Days
• Field of Search: 209/555, 209/556, 209/558, 209/571, 209/573, 209/698, 209/919, 209/939, 209/655, 209/707, 209/552, 209/912, 209/903, 198/368, 324/158 F
• US Class Current: 209/552
• CPC Class Codes: B07C 5/344 according to electric or electromagnetic properties sorting according to size measured electrically or electronically B07C5/08; material testing by magnetic means G01N24/00, G01N27/00, by electrical means G01N27/00; electrical measuring devices in general G01R; coin testing G07D5/00
• CPC Class Codes: Y10S 209/919 Rotary feed conveyor

Abstract

An apparatus (19) for singulating a series of packages (17). The apparatus (19) includes a vertical wheel (12), a retainer spring (10), a gravity feed track (14), a pass track (15), and a reject track (16). The vertical wheel (12) comprises a plurality of slots (22-29), and rotates in a clockwise direction to deliver the packages (17) to an electrical test fixture (18). Upon completion of testing, the vertical wheel (12) rotates in a clockwise direction and delivers the packages (17) to either the pass track (15) or the reject track (16). A motor driven eccentric (37) actuates the retainer spring (10) to unblock the appropriate slot (22-29), thereby releasing the packages (17) from the appropriate slot (22-29).

Claims

1. An apparatus for singulating a series of individual parts, comprising:

a gravity feed track;

a vertical wheel provided with slots disposed around a periphery of the vertical wheel, wherein the slots accept the individual parts from the gravity feed track and present the individual parts to a test fixture;

a pass track, wherein the pass track accepts the individual parts from the vertical wheel that have been tested by the test fixture and have passed the tests;

a reject track, wherein the reject track accepts the individual parts from the vertical wheel that have been tested by the test fixture and have failed the tests;

a stop spring, the stop spring extending from approximately the gravity feed track to approximately the pass track and positioned adjacent a portion of the vertical wheel with which the test fixture cooperates, wherein movement of the vertical wheel relative to the gravity feed track and stop spring determines which slots are blocked and unblocked by the stop spring; and

a shutter assembly having a retainer spring actuated by a motor driven eccentric, the retainer spring surrounding a portion of the vertical wheel spanning a portion of the circumference of the vertical wheel starting at the pass track and extending to the edge of the reject track wherein the retainer spring leaves at least one slot unblocked when in a first position, and blocks the at least one slot when in a second position.

2. The apparatus for singulating of claim 1 wherein the retainer spring permits an individual part to exit from a predetermined slot.

3. The apparatus for singulating of claim 1 wherein both the stop spring and the retainer spring are made from a resilient material.

4. A method for releasing articles from slots on a test wheel, which comprises:

providing the test wheel having the slots, wherein each of the slots accepts a single article from a track, presents the article to a test fixture and transports the article away from the test fixture upon completion of tests;

providing a pass track adjacent to the test wheel at a first location;

providing a reject track adjacent to the test wheel at a second location; and

actuating a retainer spring, the retainer spring extending along a portion of the circumference of the wheel from the pass track to the reject track and has a notch which cooperates with the test wheel to release the article from the slot through the notch when the retainer spring is moved to one of a first or second position, wherein the retainer spring is actuated by a motor driven eccentric to place the retainer spring in the first position, thereby releasing the article from the slot onto the pass track if the article passes the tests performed by the test fixture, and placing the retainer spring in the second position, thereby releasing the article from the slot onto the reject track if the article fails the tests performed by the test fixture.

5. The method for releasing articles from slots of claim 4 further including forming the retainer spring from a resilient material.

6. An apparatus for singulating articles, which comprises:

a gravity feed track;

a vertical wheel having a plurality of pockets on a periphery, wherein an article may drop into each pocket from the gravity feed track;

an electrical test fixture which test the article housed in each pocket;

a pass track which accepts the tested articles from the plurality of pockets when the tested articles have passed the test;

a reject track which accepts the tested articles from the plurality of pockets when the tested articles have failed the test;

a pocket gating mechanism, the pocket gating mechanism comprising a retainer spring having at least one notch which cooperates with the wheel to release the article from the pocket through the notch when the retainer spring is moved to one of a first or second position;

wherein the retainer spring surrounds a portion of the vertical wheel spanning a portion of the circumference of the vertical wheel from the pass track to the reject track, and the pocket gating mechanism accepts a signal from the electrical test fixture to retainer spring in the first or second position, thereby allowing the articles to selectively exit the pocket into one of the pass or reject track.

7. The apparatus for singulating articles of claim 6 wherein the pocket gating mechanism includes a motor driven eccentric which cooperates with the retainer spring.

8. The apparatus for singulating articles of claim 6 wherein the retainer spring is constructed from a resilient material.

9. The apparatus for singulating articles of claim 6 wherein the vertical wheel rotates about a horizontal axis in a clockwise direction.