Browse Prior Art Database

Screw Feeder

IP.com Disclosure Number: IPCOM000090486D
Original Publication Date: 1969-Apr-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 2 page(s) / 82K

Publishing Venue

IBM

Related People

Austin, WL: AUTHOR

Abstract

The device feeds short Allen or Bristol socket head screws 2, whose diameters are approximate to their lengths, to mechanical screwdriver 4 which drives the screws into position in a workpiece. A supply of screws 2 is contained in open-sided hollow drum 6 which is rotated by motor 8. Ribs 10 in drum 6 lift screws 2 from its bottom and drop them on vibrating tray 12. This is resiliently mounted on chute 14 and projects through the open side of drum 6. Tray 12 is vibrated by resilient arm 16 attached to it whose free end engages toothed wheel 18 rotatable with drum 6.

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Screw Feeder

The device feeds short Allen or Bristol socket head screws 2, whose diameters are approximate to their lengths, to mechanical screwdriver 4 which drives the screws into position in a workpiece. A supply of screws 2 is contained in open-sided hollow drum 6 which is rotated by motor 8. Ribs 10 in drum 6 lift screws 2 from its bottom and drop them on vibrating tray 12. This is resiliently mounted on chute 14 and projects through the open side of drum 6. Tray 12 is vibrated by resilient arm 16 attached to it whose free end engages toothed wheel 18 rotatable with drum 6.

The vibrations of tray 12 tend to orient screws 2 in a socket uppermost position on such tray and to feed the screws to the upper end of chute 14. Chute 14 has a track only slightly wider than the diameter of screws 2. Arm 20 carrying tooth 22 is reciprocated by eccentric 24 and is formed with cam surface 26 cooperating with pin 28 to procure movement of tooth 22 through a closed path. Tooth 22 moves downward and engages in the socket of a correctly oriented screw 2 at the head of chute 14. Tooth 22 then moves horizontally to the right in the drawing to feed such screw past spring-loaded block 30 which projects somewhat into the track of chute 14. In the case of a misoriented screw 2, tooth 22 engages the threads or some other part to feed the screw forwards, but cannot positively engage in the socket since this is not uppermost.

When a misoriented screw 2 is fed past block 30, the latter...