US2508361A - Feeding mechanism for sole rounding machines - Google Patents

Description

May 23, 1950 c. w. BAKER FEEDING MECHANISM FOR SOLE ROUNDING MACHINES 6 Sheets-Sheet 1 Original Filed Dec. 29, 1945 Inven zor Corn/17, MBaker fiy/ms/lttome May 23, 1950 c. w. BAKER 2,508,361

FEEDING MECHANISM FOR SOLE ROUNDING MACHINES Original Filed Dec. 29, 1945 6 Sheets-Sheet 2 In men for CON/1.11.71 WBM/ 53 his 4 i orngy May 23, 1950 c. w. BAKER FEEDING MECHANISM FOR SOLE ROUNDING MACHINES Original Filed Dec. 29, 1.945

6 Sheets-Sheet 4 [@Mr Com/z'n M Baker May 23, 1950 Original Filed D80. 29, 1945 .c. W. BAKER FEEDING MECHANISM FOR SOLE ROUNDING MACHINES 6 Sheets-Sheet 5 veniar Com/[n M fiaker y 1950 c. w. BAKER 2,508,361

NG MA [72 van for Com/Zn M fiaier Patented May 23, 1950 FEEDING MECHANISM FOR SOLE ROUNDING MACHINES Corwin W. Baker, Beverly, Mass, assignor to United Shoe Machinery Corporation, Flemington, N. .L, a corporation of New Jersey Original application December 29, 1945, Serial 638.285. Divided and this application August 6, 1948, Serial No. 42,908

Claims.

This invention relates to machines for rounding soles of shoes to the desired peripheral contour and, more particularly, is concerned with the rough rounding of shoes of the stitchdown type in which the upper material is flanged outwardly from the side of the shoe, and is stitched to the margin of the outsole.

The usual type of machine for performing this operation has a guide for positioning the shoe with respect to a rounding knife or other trimming member, the guide being arranged to engage the outwardly flanged upper material and to be seated in the crease between the shoe upper and the sole edge. It is evident that any irregularities in the flanged upper material are likely to impede the advance of the shoe past the guide as well as to affect the positioning action of the guide upon the shoe.

In my copending application for United States Letters Patent Serial No. 638,285, filed December 29, 1945, there is disclosed a machine of the above type having a rotatable pressure member arranged to impart a smoothing action upon the flanged upper material just before it is engaged by the guide so as to eliminate any projection which otherwise might interfere with the feeding movement of the shoe, or disturb its position with respect to the rounding knife. Hence steady and regular feeding of the work is assured, so far as the action of the above-mentioned guide upon it is concerned.

This object is furthered in the same machine by the provision of improved feeding means which is claimed in this application, a division of my above-mentioned application.

An object of the present invention is to so engage the work by opposite movable feed members that none of their advancing action will be .lost, and the sole, if yieldable, will not be deformed. To this end, one of the two members is caused to move'more rapidly than the other in the direction of work-advance, and, by making the work-engaging surfaces converge, there is caused a wedging effect upon the work, so it will be firmly grasped during its feed. Moreover, with a feed member engaging the upper margin of the shoe-bottom and a rest engaging a tread-surface, the movement of the rest is made rectilinear rather than with a component acting toward the bottom-edge, so there is avoided the tendency to force yieldable sole-material outwardly where it would be positioned improperly for trimming. The bottom-rest may have a convexly curved work-engaging surface, it being preferably in the form of an outwardly curved strip pivoted at one 2 end upon a slide and with the other end forced yieldably toward the companion feeding member. It is shown as adjustable as to the vertical angle of its work-engaging surface, its pivotal connection being to a carrier which is variable in position upon the slide.

A further object of the invention is to decrease the length of time in a work-feeding cycle in which the advance is delayed or interfered with. With opposed members movable in directions in which they first feed the work a step and then return to their initial positions for another step, the time during which the work is being grasped, in preparation for advance, is customarily taken from this advance, and the interval during which the work is released at the termination of a feeding step delays the time of return movement, particularly since the separation must be suflicient to avoid rearward displacement of the freed work. I have materially reduced these periods inefiective for work-advance, by the inclusion, in the means by which the feed members are carried relatively toward and from each other, of two members which are movable simultaneously in opposite directions for the production of an accelerated relative movement. In the present instance, these members are provided with cooperating cam-portions which are engaged and disengaged by the opposite movement, thereby alternately causing the feed members to approach rapidly and then permitting them similarly to separate.

In the accompanying drawings illustrating one of the several possible embodiments of the invention:

Fig. 1 shows the more essential portions of my improved rounding machine in front elevation;

Fig. 2 is a side elevation, looking from the left in Fig. 1;

Fig. 3, an elevation of the opposite side of the machine;

Fig. 4, a perspective view of the elements more closely associated with the work;

Fig. 5, a broken top-plan-view of the bottomrest and the cooperating feed-arm;

Fig. 6, a detail, in elevation, of the mounting for the bottom rest, viewed from the right of the machine; and

Figs. '7, 8, 9 and lilare, respectively, enlarged sections on the lines VIIVII, VIII-VIII, IX-- IX and X-X, Fig. '7 showing the means for oscillating the feed-arm, Figs. 8 and 9, the means for producing-the work-engaging movement of the, feed-arm, and Fig; 10, the means for recipro eating the bottom-rest.

A considerable number of the elements of the present machine are substantially the same as in the Well-known Goodyear Universal Rounding and Channeling Machine, Model E as disclosed Letters- Patent of theiUnited States" No. 1,039,696, granted June 25; 1912, upon an application filed in the name of Frederick H. Perry. Referring first to parts of the present machine which may readily be identified in the {Perry ipatent afiverth cal column 28 carries at its upper extremityiahead 22 upon which the various work-engaging and operating members are supported. Acreaseguide 24 of generally U-formy-toreceive the-crease of a shoe being operated on, is adjustably secured to the upper forward portlonzof thahead byslot and-screw connections 2.6 1111115173301 of? be -;:arranged for vertical oscillation, as in the-:previously mentioned machine, In the upper portion of the head 22 is journaled a horizontalshaft'28,

oscillated as will be later described, and havin fixed toits forward extremity afeed-arm as "lying between the Opposite arms 'of' the crease- ---guide. 'Withthe'crease' of a'shoe applied to the crease-guide; as appears in Fig. 4-, the usualfeedpoint-"fixed to thefeed-arm receives contact of the flange of a stitchdown-shoe or the welt ap- ---'plied-"thereto. *Reciprocable in horizontal ways air-32in the head is a'slide 34, in which is fixed arounding knife 36 cutting against ananvil set -in the feedpoint. 'The construction of the knifeoperating means is the same in'the present machine as in the above-mentioned'Perr machine.

Now, to describe the novel features of thisin- -vention-and the changes-which have-been made "inthe original 'lnachine to adapt it to'its present use, itmay first be said that the mechanisms more directly connected with the channeling of the shoe and for 'varying'the extension of its rounded edge are omitted. 'Projecting from the lower portion of the head at'the front is a'stat-tionary'sleeve 38; upon the-forward end of which is a Vertical extension 40 having in its front face w a: horizontal guideway '42 '(Fig. 5). In' the guideway a slide A l is movablefit being reoiprocated througha forwardly projecting'stud -43 lying in a s1ot"'4i3 formed longitudinally of an arm 5 fast upon a'shaft 52 arranged to oscillate the sleeve -38 and in bearing inthe head'22. "The shaft is-oscillatedby an arm" 54'-fast upon it (Fig; 10),

r a toggle 55, pivoted to the arm andto the head,

and an eccentric-rod SB joined to the center of the toggle, the strap of which rod surrounds an eocentric dtlsecured' to a:shaft- 52- journal'ed in the': head paralleltothe'sh'aft'52. The-shaft 52 carries a pulley 64 through which it is rotated from some'source' of power.

4 A rearwardly ofis'etportion atte ofthe slide 5144 has; at its" front;- avertically- --curved surface 68 (Fig. 6) against which rests the complemental -.=:=surface"IB-of a carrier member?! adjustabl se-i,

cured to the slide by a slot-and-screw connec- -2"-=tion. 14. Joined tothe-carrier'by a vertical pivotscrew it is anoutwardly-curved horizontal-strip 78-; the central portion of which lies opposite the feed-arm 39; furnishing a rest for the bottom on.

: rtread-surface of a'sole atta'chedto a'shoe. The

endof the restlB-oppo'siteits pivot has" fixed in it an eye 80 engaged by a hook B-Zproviding a universal' connection-to ahorizontal rod 84 passing through an opening in arearwardlyextendingthe spring toward the feed-arm; to an extent perforked its upper end to receive the rod as and attached toaspi-nd-le 98 (Fig. 2) guided to move horizontally in the head 22, Fixed to the spindle is a collar is'lii, with which contacts an arm I02 -rising from a shaft 5M journaled in the head transverselyof the spindle.

To the end of the shaftiil i opposite the arm 592 is fixed an arm I 08 =(Fig,-.,3),,,the,upper end of which is engaged by "the" depending arm of a bell-crank -lever 5G8 fulcrumedsupon the.

" -bell-cranl-: is determined by astop-screw I I 2 contasting withthe headv Depressionoi the'trea'dle and rod. Iii), acting through the-chain of elements just indicated, shifts-thearm' 96- rearwe rdly against a collar H4 fast upon the rod fid.

"This draws the bottom-rest rearwardly from the feed-arm. compressing'the'spring: 82, The feedr arnr'fii i is osc'iliated -inthe correct time relation to 'the reciprocation of the bottom-restto advance a'shoe during an operation upon'it, through 'an arm i513 havingits hub secured to. theshaft iliilFigi 7), a tog .sie' IIS, pivoted to the arm and 1 to the headfli, and an eccentric-rod 125* actu- %ated by an eccentric fast upon the sh aft/52. Duringthe oscillation ofthe feed-armtil and 5' the reciprocation 'ofi-the bottom-rest 18, they are separated at the .end of the forward stroke; freeing the work after a step in its advance, then closing againupon the work at the term'nation -this purpose, a movement of reciprocation fore and aft of the machine is imparted. to the feed- =-arm. This arm isurgecl =yieldably away from w-the bottom-rest .hy -'.2Lll' expansion-spring i124 2) contained in an axial bore in the shaft 28 and abutting at its-outer end against. a plate i-Zfi attached to the head '22. f Arranged to turn "loosely'upon the'shaft 28 are armsrIL-ill and132.

The arm 139 *(FignQ is oscillated by its connection to an eccentric-rod I34-;' thestrap of which encircles an eccentric i 33 fast uponthez shaft The arm i'SZ'TFig; 8) -is oscillated oppositely to the 'arm I3!) throughan eccentric-rod E38 actuated by an eccentric] 45! upon the'shaft {52. On

E-l';1'l inner'face of the hub of the arm'l3ll is a camzdepression "H52; and cooperating with'this, upon 'the hub of the arm 132; is a oam-proiection I44.

--At the*-time the fed-arm iiflis to :be carried in to'clamp the'work against the back-rest "lllfthe ;---,cam-depression M2 is turning 'contraclockwise, :a-as viewedf-rom the front of the machine, while ,the cam-projection I l iis turning clockwise. As

- theinclined end walls of the depression and pro- 'rjectio-nengage and pass each other, as a result of their'opposite movement, sincethe' hub of "the .arm :IZiEi bears at its outer side against the adjacent surface of the head' 22,- the projection 0 l ltrides out of the depression I42 onto the end -'oithe hub of the arm ififl. The arm lIBis fixed tothe shaft 23 and is backed by a collar I46, also *ofastupon the shaft and-spaced from the adjacent -surface of the head. 'f The reed-arm 30 is there- -fore abruptly shifted rearwardlytoward; the bot- -tom-rest I8 to-gripthe sole-margin, which is thereafter as quickly freed when the projection and depression again mesh, because of the reverse oscillation of the arms I30 and I32 and the expansion of the spring I24. By the prompt engagement of the feeding members, there is utilized the maximum time in an operating cycle of the machine during which the work may be advanced, and by their prompt disengagement, there is minimized the time during which the work might back-feed.

To outline the manner in which the feed-arm 30 and the bottom-rest I8 cooperate to advance the work for the rounding of the sole s of a shoe S by the chopping knife 35, the operator, by drawing down the rod IIIl through the treadle, retracts the bottom-rest from the feed-arm and inserts the sole-margin between them, then releasing the treadle. Engagement of the crease with the guide 24 (Fig. 4) determines the path through which the work will move and the width of the sole-extension produced by successive cuts which the knife makes against its anvil. At the beginning of a work-advancing cycle, and viewing the elements from the operator's position at the front of the machine, both the feed-arm and the bottom-rest are at the extreme right, with the bottom-rest having moved farther in that direction than the feed-arm. They are spaced from each other transversely to such an extent that a sole which has been between them will have been released. First, the feed-arm is carried rapidly in by the cams I42 and I44, so it acts upon the upper margin of the shoe-bottom to clamp the tread-surface against the bottom rest.

Starting at substantially the same time, the two feeding members are moved to the left through their full strokes by the respective eccentrics 60 and I22, the bottom-rest traveling more rapidly than the feed-arm. As a result of this different rate of movement, and the fact that, as may be seen in Fig. 5 of the drawings, the work-engaging surfaces of the members converge in the direction of travel, a wedging action is produced, the bottom-rest forcing the sole-margin outwardly against the feed-arm. Thus, without the danger of mar-ring the tread-surface of the sole, which would exist with the use of a roughened member, the work is firmly gripped, even if the sole presents a polished or smooth surface. Having made the forward and fully effective feedstep, the feed-arm is quickly withdrawn by the spring I24 as permitted by cams I42 and HM to release the work, and the bottom-rest I8 is retracted to its initial position by the eccentric $0, the feed-arrn remaining in its advanced position while the rounding knife 36 comes forward and makes its out against the anvil on the feed-point. This is followed by retraction of the feed-arm under the influence of the eccentric I22 so both members are restored to normal, ready for the succeeding operating cycle. It is to be noted that the work-feeding movement of the bottom rest I8 is rectilinear and not oscillatory, in the old machine. If the bottom-rest were to swing upwardly as well as forwardly in the advance of the work having soles of rubber or other readily compressible material, its upward pressure would cause the sole-edge to bulge outwardly and to be held in this condition while the rounding knife makes its out. When released, the edge would spring back so an objectionable inward bevel would be formed instead of the desired vertical edge.

In the rounding of stitchdown shoes, in which a flange f of the upper material extends over the upper margin of the soles s (Fig. 4) irregularities occur in the surface of the flange which contacts with the crease-guide 24. These may be the result of cutting away or pinking the flange to facilitate carrying the upper about the more shanply curved peripheral portions of the shoe at the crease c, or, in absence of such pinking, the flange may be puckered or gathered at the curved portions. In the first instance, as the work is fed forward, the spaced fingers of the flange produced by the pinking may engage or be deflected outwardly by the edge of the guide. This will so position them that they will not be trimmed by the knife 36. The projections of the unpinked flange, by striking against the edge of the crease-guide, tend to interfere with the advance of the work. To guard against these difliculties, I attach to the top of the head 22, at the front, a bracket I SI! through which is a horizontal bore. Secured in the bore by a set-screw IE2 is the shank I54 of a block I66. In a bore in the block, extending transversely of the shank I64 is the shank I68 of a bearing member IIII fixed in position by a set-screw I'I2. Rotatable in the bearing member is a spindle I'M, the location of which longitudinally of its axis may be determined by collars I16, I16 adjustably secured to the spindle by set-screws I18. The lower collar is normally spaced from the adjacent end of the bearing. The lower extremity of the spindle is roughened, it being herein shown as toothed by forming in its conical end I19 peripheral grooves ISD and longitudinal grooves I82. The capacity for variation in the position of the shanks I64 and I63 both longitudinally and angularly, and for change in the longitudinal position of the spindle, renders the end of said spindle universally adjustable, so it may be located in any chosen relation to the edge of the guide 24 toward which the upper margin of the shoe-bottom advances. This i preferably with the conical end in close proximity to the guide, the axis of the spindle being upwardly and rearwardly inclined and the apex of the end preferably lying at or just below the crease-entering end of the guide 24 and the side which engages the upper-flange f situated approximately in the plane of the flange-contacting face of the guide. The spindle I14 is rotated in a contraclockwise direction, as viewed from above, by a pulley I as fast upon it, and driven by a belt m6 operating over the guide-pulleys I88 rotatable upon a bracket i9!) secured to the top of the head 522, and over a pulley I92 fixed to the shaft 62.

As the surface of the flange f of the shoe S approaches the conical spindle-end IIEI, it enters a converging throat formed between the uppermargin of the sole 5 and the curved surface of the spindle. The roughened surface of the spindle presses against the surface of the flange and smooths out any divided portions, unfailingly insuring that they will pass at the inner side of the guide 26 and will not contact with its edge. Uneven portions of the flange-surface are compressed and smoothed by the combined pressure and rotation of the spindle, so they lie at the inner side of the guide, where they do not interfere with the feed of the work by engagement with the guide-edge. Because of the direction of rotation of the spindle-end, it offers no frictional resistance to the advance of the work. Since the spindle is capable of rising to a limited extent in its bearing, it floats in the crease c and. is displaceable upwardly as the work is turned at curved portions. Consequently, it does not affect the poir-sit-ioning -of' the time by; the guide. ,1 .The angular adiustment of the bottom-rest. through change :cintheiposition of itsnarriers'l 2; disposes the treadengaging surfacecorrectly :for; differently curved shoe-bottoms. Since the centerof curvature of the surfacesfiB-ahdzlfl preferably lies atthe upper wedgeoithe rest; the adjustment does not disturb the desired vertical relation of said rest to the rcooperating.portionsaof the icreasea-guide 26 and feeds-arm 3U.

iflaving rthusadescribedc my invention; what I --1.claim as new and desire-to secure by LettersyPat- "ent of the :United; States is:

" ulna aim-roundin machin ted .andzarrangedzato -fof Elk ling-"strokes: thr n hthe-ymargin of a .shoeesole, iopposi-t :mem movable in alternation: with said -trimm means ;to:- advance the work: betweensuccessi trimmingistrokesito re- --ceive ;theaction of the rimming means; and "meansfor =movingbneg; pf; the: members in the direction of advance more rapidly than theother member.

21 In. ai-iroufidingv machine;:.;triinming --mean.s constructedzzand arranged to. make a succession oftrimming cutsthrough the margin of a shoesole,*opposite-membersmovable-after each cut -toadvancefithe-work: toi-ireceiye, the succeeding cut*from said trimrning means; the work-engag- ---ing=surfaces of thezmernbersconverging in the direction of-advance,=rand.:means for moving one of the membersinithe' direction of advance more rapidly than the otheizrjtherebywedging the work 4 between-the converging surfaces.

3E-ln a sole-rounding machine, amovahle feed member for engagement with ,;the upper margin of a shoe-bottom; a'xroun-ding knife cooperating "with-:theieed'amembereto"trim the shoe-sole, a 'movable resttforengagement: with the treadsurface: of' thersole; ;andirneans for moving the rest in a-rec'tilinearxpath in cooperation with the I feed member to advance-the, work to receive the action: of. the roundingiknife.

4:'-Ina soleeroundingumachine; a movable feed trimming means member for engagement with the-upper margin;

of afshoe-bottome.a-rounding knife cooperating with 'the': feed memberrgtoiitrim theshoe-sole,-.a movable rest forrcngagernent with-thetread-sur- 'face of the sole, the work-engaging surface being wourvedu-convexlyrtoward': the feed--member,- and;

r. coop. tion-with?th feed-member to advance the-work to-reoeive the action ofthe rounding knife.

In a -rounding--machine, a, movable teed memberi-for engagemenvwithl :the ,uppermargin of a 'shoe-bottoni,'.v a aroundingii knife cooperating :"with the feedwmember; jtogrtrim the -1shoe+sole,v a movable arest forriengagemcntv with? the-"tread- 1 surface of the sole andc-aneansf for moving the rest in arectilinearpath-incooperation with the feedmembenand more-rapidly than said feed "member to advanceftheiworktoreceive the-action of the rounding knife.

.Grl'n a.-lrounding: machine,- a p movable feed -member for engagement:with the upper, margin P of a shoeebottoin, a'iroundingiknife cooperating :with Qthen-feed membergto ;;trimi the shoe-sole; a -guide member provided; with ways, aislide movable in'the ways; :an outwardlyeurved strip pivaka a. succession;

8 ot,ed-;to the slide. and furnishing.oppositethe .teed; member a rest for the tread-surface ofthe 5.5016, means for forcing, the strip yieldably toward the ed. member, and means for reciprocating thepnide ,tocause the strip toact with the 'feed -membe'- and advance the work to. receive the action of the knife.

-,7.gIn1 a rounding machine, a movable :feed :v member for engagement with the upper margin of a shoe-bottom, a rounding knife cooperating 'With the feed member to trim the shoe-sole, a i guide member provided with ways, a slide mov- :able; in. the ways, a carrier variable in-position ,;upon,the slide, an outwardly curved member piviotedtupon the carrier and furnishing opposite :thefeed member a-rest for the tread-surface of the sole, and means for reciprocating the .slide to; cause. the rest to act with the feed member and advancethework to receive the action of the, knife.

8.; Inga rounding machine, a movable-deed 1; member for engagement withthe upper margin of a shoe-bottom, a rounding knife cooperating witlr'the is member to trim the shoe-sole,- =a guidemember provided with ways, a slide movable in theways, a carrier variable in position upon'the slide, a strip pivoted tothe carrier, and ffurnishing opposite the feed member a-rest for ,thS tread-surface of-the sole, the slide and carrier having complemental contacting surfaces curved about a center lying, substantially at the upper edge of the strip" and permitting the carrier to be moved upon-the slide, and means for securing the carrier different positions resulting from such movement.

9. In a rounding machine, a trimming member, members-arranged for engagement with opposite sides of ashoe-bottom, means for advancing vancing and retracting the arm and rest to pro- 1 duce successive feeding steps presenting the work to the rounding knife, two rotatable members :having cooperating cam-portions, means for turning the members in opposite directions-to cause the engagement and disengagement of'the cam-portions and thereby alternately cause the separation and permitthe approach of the two members, and-means for communicatingv such movements of the members to the feed-arm.

CORWIN'W. BAKER.

REFERENCES CETED The following references are of record-in the file of this patent:

UNITED STATES PATENTS Number Name Date (2,373,107 Dufiy r Apr. 10,-1945

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