Patent GB-614342-A (GB)
Title: Improvements relating to machines for inserting and fixing eyelets, rivets or the like
IPC: A43D100/02
Filed: 1946-07-10
Abstract: 614,342. Eyeleting. EVANS CONCINNUM, Ltd., and HUDSON, F. N. A. July 10, 1946, No. 20675. [Class 43] In an eyeleting machine of the type comprising a vertically reciprocatable plunger for receiving the eyelets, a co-operating die, a pivotally mounted eyeletstoring and delivery head, and mechanism which relates the movements of the plunger and head so that when the for mer is operated the delivery part of the head is automatically advanced and with drawn as required the said head turns on an axis either parallel to the line of stroke of the plunger or forming an acute angle therewith, a double-ended head operating lever being provided one end of which causes or per mits turning of the head away from or towards the plunge] when the other enc is respectively engaged by or disengaged from means on a plunger operating lever. An adjustable, pointed die 3 co-operates with a plunger 5, in the upper end of which a punch 6 is removably fixed. The plunger is linked at its lower end to one end of a plunger-operating lever 8 pivoted on the frame and is normally held away from the die 3 by a spring 9. An inclined eyelet-storing and delivery head 10 comprises two guides 12 and a base plate 11 which has a central, vertical boss 13 provided with a hole for the upper end of a pin 14, which is turnable in a bearing 15 formed on a lug bolted to the frame. The lower end of the head 10 is bent approximately at right angles to the axis of the die and punch, and extends beyond that axis when in working position. At the upper end of the head is a storage box 16 having spaced openings through which eyelets, with their flared mouths downwards, are fed to the runway by a rotary impeller mounted upon a shaft 18 which projects below the plate 11 to receive a pinion 19, the latter being in constant engagement with a gear sector 20 fixed on a lug 21 on the machine, so that turning movements of the head 10 cause rotation of the shaft 18. Between its lower end and pin 14, the plate 11 is provided with a lug 22 having a flat inner face for engaging a roller 25 on the upper end of a doubleended head-operating lever 23, which is pivoted between its ends on the frame 1 between the head 10 and lever 8. On the lower end of the head-operating lever 23 is a roller 26 which, when the lever 8 is operated, engages the chamfered inner face 28 of a curved lug 27 provided on the lever 8. Initially the inclined face 28 is clear of the rollar 26 and the lower end of the runway, which communicates with a flared eyelet discharge slot, is over the punch 6 ; a spring-urged plunger normally prevents the entry of an eyelet into the slot. When the plunger-operating lever 8 is depressed the punch 6 engages the lowermost eyelet in the runway, then the inclined face 28 on the lug 27 contacts the roller 26 causing the upper end of the head-operating lever 23 to swing away'from the frame 1, whereupon the roller 25 presses against the flat face of the lug 22 and swings the lower end of the head 10 away from the punch 6, the tip of which together with the eyelet thereon being disengaged through the discharge slot against the pressure of the above-mentioned spring-urged plunger. Further depression of the lever 8 forces the punch 6 and eyelet through the material, and the eyelet is clenched against the die 3. 'When the lever 8 is allowed to return to its inoperative position the inclined face 28 is disengaged from the roller 26 and the head 10 swings back under spring action into its working position. The turning axis of the head is preferably vertical, but it may form an acute angle with the stroke of the plunger 5, the boss 13 being at right angles to the base plate 11, and the pin 14 and bearing 15 being inclined.