US2292851A - Strip feeding apparatus - Google Patents

Description

Aug. 11, 1942. TYKAL f STRIP FEEDING APPARATUS Filed April 10, 1940 lA/Vi/VTOI? 1 V BRTY/(AL I erg v Patented Aug. ll, 1942 h I V c 7 v I c Q I j ,STltIP FEEDING APPARATUS 1;; h Bohumil 8.. Trial, Bemn, 111;, assignmto West-,1 a 1 em Electric, Company, Incorporated, New" A I ,York ,cN; Y., a corporation olNew York f 1 H fi ApplicationApril 10, 19d0, Serial'-No;;328,921=, I 7' j lClalm- (01271-24) 1 h This invention relates to strip feeding app'aramechanism adapted toffeed equal amounts. oi tus and more particularly to apparatusior interstock to thepressj for'each" reciprocation or the f mittently 'ieeding a plurality of stripssimu-lta- 'tools in-th'epress';

1 V neously to a material working apparatus. 2 is'a vertical sectional view on an en 1 Considerable difllculty has been experienced larged scale, taken "alongjtheline 22 or Figlfi l? in feeding a plurality ,oi strips to a punch press in the direction of; the-arrows and showing'the designed to term a num r bf'parts simultaneconstruction ofthefieed'rollers, and 'v: ously due to'the fact that thestrip material from 3 is'avertical sectional view taken along which the parts are 'to be made varies in thickthe line 35-! of Fig. Z' inthe directionaofv the ness and, it a single feeding device is provided, arrows; I i I w slippage will'occurbetw'een the thin parts and 7 Referring no'w to'the drawing, 'wherein like the feedingv apparatus andthe proper amountoi reference characters designate the sameparts material will not be fed for thosestrip which throughout: thesverahviws; particular referare slightly under size unless "some means-is proence bein had. at'this time toFig. 1, there is vided for compensating for the variations in lfi-shown a piinchpress mechanism and it cooperthickness of thestrip material." h atingieed mechanism, which include a bed 4 Attempts have been made to feed-strips or mounted upon ia suitablestandard or base 5 and material by using a soft, rubber or synthetic rubcarrying a bolster' plate 6; -Mounted upon the fber roller in association with"a metallic roller bolsterplate i-is'a suitable die block 1 for se driven in synchronism withthe operation or the operation with a reciprocating punch block-1 punch press. Thismethod or feeding strip'stock carryin bunc es 9+9 and a po i pin r has not proved entirely satisfactory due to the guide pin It, as well'as'asuitable cut-oil punch tact thatwhen sufiicientpressure isput on the L .T e P s 9,:P0Sit10ninB Di "I d cut-- rubber roller to cause it to engageall of the of! punch I] are shown purely as nexam w strips of stock being ied'intofithe'working;appah m sf s'w be s a it ratus, the rubber roller would flatten out and not -shou1dbe understood that various other types of teed the same amount to eachfo'tthe operating f ools might be'pr vi d withoutdeparting from mechanisms ioroperating'on the stiips. the present invention, -whichis not directed to a It is an object of thepresent invention to prothe tools-per Se; but rather tothe feedingmechm vide a. simple apparatus for feeding accurately nism for feeding strips or sto'cir ll to the'tools'.

measured amounts of strips" of material simultaf c he Pun h blo k) is mounted upon a suitable neously to material working apparatus. ram i3 and is adapted torbe reciprocated by a V In accordance with one embodiment of the in- I n e ing. rod stile ram: l3 beingiguidedin vention, a pair ot cooperating ieeding rollers are 3 ways "a r s usual n punch'presses er provided, one oithese rollers being a metal teed the type? i11ustrated"herein.- connectingrod m g n conventibnal type Qpemted ffom 1.14 has reciprocating motion imparted theretoby the drive-mechanism of the punch press; Coo'ptheusual type of crank mechanism .not-shownrin erating with this conventional roller for impart-' I detail but positioned h nd the plate 111' and ing intermittentieeding motion to a plurality of v w h li y-whe l l8: The actuatingrmecho a strips of stock is a feeding roller,;springpressed 81115 f r the feeding apparatus, as is u ual-in into engagement with the first-mentioned roller, h h presses of this type,- is actuated byfllink and comprising a drum or cylinder with a series pi l y connected to the p nsof rings of resilient material; such as rubber or i ine p wer from the cr k f e. press preferably synthetic rubber, encircling it and will? i i -pp i e link l9has its having superposed on them a seriesoi metallic lower end pivotallyc n t a v r 0, which rings, one ring being provided for eachfrubber 'is interc'onnected with trunnions 2| by either a ring, and the rings being connected through the pawl and ratchet mechanism, a freewheeling rubber to the drum or cylinder. type of c1utch,' or; similar mechanism, so, that.

Other objects and advantages of the invention upon movement or the lever 20 in a counterwlllbe apparentirom the following detailed de- 9 cl c wis e i n the run ons 2| will be scription of one embodiment thereof, reference driven y the lever but P movement f t being had to the accompanying drawing, wherein lever 20 in a clockwise direction, the lever will Fig, 1 is a front elevational view of a punch not move thetrunnions 2|. Anysuitable mechapress designed to work on a plurality or strips of 2 111 111 kn w t h art may be utilized for 'ac-E metal at a time and having a stock feeding *complishing this function and the form of appa- V happen to be engaging a urged downwardlyby pins 28 pressing against the blocks and being urged downwardly by a coiled spring 23 surrounding a rod 29 and interposed between a washer 30 and a washer 21, a nut 3| being provided for adjusting the position of the washer 30 and the lower endofthe rod 23 being fixed in a top plate 33 secured to the the strip l2 of stock to adjust it for position under the punches 3.

A better understanding of the operation of the device will be had from the following brief description of the operation thereof. After a number of strips of stock I 2 are suitably positionedbetween the cylinder 26 and roll-31, the

punch press may be started and. in its downward stroke from the position shown, it will feed one half the desired length of stock to the tools before the abutment 42 strikes the lever 43. Continned rotation of the fly wheel I! will cause the ram It ,to move downwardly and the guide pin ID will position the stock accurately and shortly side plates 22. The bearing blocks 24 receive trunnions 25, which..extend outwardly froma feeding cylinder 38, which cooperates with a metal feed roll 31 in the feeding of the stripsl2 to the operating mechanism oflthe punch press. Suitable gearing is provided for interconnecting the cylinder 36 and feed roll 31- so that they travel at the same speed in feeding stock, It should be noted. however, that it is not essential to drive both the cylinder 36 and the feed roll 31 since either of them may be used as an idler. The cylinder 36 has a series of groups of pockets "formed therein, there being four pockets 38 ineach group of pockets and there being a group of pockets for each strip l 2 to be fed. The pockthereafter the punches 8 and shear II will punch holes in the stock and shear one part of the stock from the main body thereof. The punching will occur during the period when the link I! is beginning to move downwardly to the right (Fig. 1). Continued rotation of the fly wheel i8 withdraw the punches and guide pint and I0, respectively,

vstrips ofstock l2 between the cylinder 36 and ets 33 receive pins 39, the outer ends of which,

are fixed in steel rings so that whenthe cylinder 36 rotates, the steel rings 40 will be rotated with it. Interposed between the outer surface of the cylinder 38 and the inner surface of the steel rings 40, and suitably secured to the steel rings 4|], are a seriesioi'ecushioning members in the form of synthetic rubber rings 4|, which permit'the steel rings to be forced out of their normal position when a relatively thick strip is engaged by one of the rings, as shown, for exam-- pic, at A and B(Fig.o 2). The rings 40, which engage strips l2, slightly thinner ,than average, are shown at C and D and the-other or average size strips l2 are shown at E and F and will also be engaged by theirrespective rings 40. In this manner. those rings 40 vwhich engage the thin strips' I2, although they are moved into a position eccentric of the cylinder 36, will tightly engage the strips l2 and will feed them exactly the same distance as those rings 40 which engage the thick strips and the average-sized strips due to the fact that, the peripheries of all of the rings being exactly thesame size, the lineal travel of the surfaces of the rings which engage the stock will be the same regardless. of whether the rings relatively thick or relatively thin strip I 2.

As is usual in punch presses of this type, the feed rollers which feed the parts to the press from thestock.v As the ram. It moves the last quarter of the distance in its upward travel, the crank I 3 will havestopped moving downwardly to the right andwill'begin moving upwardly to theleft (Fig.1) and will start to feed the stock, the abutment 42 having moved away from the lever 43 and permitted the springs 23 to force therings 40 into engagement with the stock before 'the'rollers start to rotate. If all of the roll 31 are of'exactly the same thickness, then all of the rings 4Iijwill have an equal amount of eccentricity with respect to the roller 38. 'However,if some of the strips I 2 are thick and some thin. the cushion of synthetic rubber'4l willpermit the rings 40 to adjust themselves so that they willall bear against the strips of stock l2 with substantially the same pressure and since for each cycle of rotation'of the cylinder 38 the peripheral surface, of the rings 40 will move through, exactly the same distance, the amount of stock fed by each ring 40 will be the same as are separated by anv-abutment 42 fixed to the that fedjoy all ofthe other rings.

. Although a specific embodiment of the invention has been described hereinbefore, adaptations thereof may be made without departing, from the scope of the present invention, which is to be limited only by the appended claim.

What is claimed is: In a strip feeding apparatus, a feed roller comprising a cylindrical body member having a series of groups of radially extending pin receiving pockets formed in it, a plurality of non-resilient metallic rings surrounding said body member.

annular cushioning membersof resilient material, surrounding the cylindrical body member and interposed ,betweenrthe body member and the non-resilient rings, said annular cushioning members being individual to said non-resilient vrings and being of a width equal to the width of said non-resilient rings and a group of pins fixed to each of the rings and extending radially inwardly through the cushioning member and into the pockets in the body member.

BOHUMIL R. TYKAL.

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