GB1506398A - Automatic screwdriving and feeding apparatus - Google Patents

Abstract

1506398 Screw driving and feeding apparatus B E VINER 29 Sept 1975 [28 Nov 1974] 51583/74 Heading B3N An automatic screwdriving and feeding apparatus comprises a tubular housing 33 axially movable on the body of gun 8, an inclined feed tube 7, screw holding means in or on the housing and in the form of resilient or spring biased jaws 35, Fig. 6, or resiliently biased balls 44 in recesses 45, Fig. 8, drive means, turbine 42 and screwdriving head 43 and feed means 5 for supplying screws at one at a time through the tube 7 and housing 33 to the holding means. The feed means 5 as shown is supplied with a succession of screws 3 by vibratory bowl feeder 1 and comprises a reciprocable slide block 15 reciprocated by air ram 17 in a housing 14 from a first position, Figs. 3 and 4, where it receives a single screw in a recess 20, the screw head engaging a plug 21 with a bore 22 and the other end being engaged by a groove 25 in an arm 28 of spring biased bell crank lever 28, 31 to a second position, not shown, where the lever is pivoted by a pin 32 on housing 14 to disengage from the screw which is blown out of the recess and down feed tube 7 by air passing through bore 22 which aligns with air inlet tube 12, Fig. 1. The position of block 5 in housing 14 may be adjustable to suit differently sized screws Handle portion 41, projection 40 and drive head 43 of gun 8 are movable relative to forward tubular portion 33 slidable block 37 and trigger 38 which controls the passage of air. Control of the operation is also carried out from box 9.