US2406306A - Shoe supporting jack - Google Patents

Description

A.' R. MORRILL SHOE SUPPORTING JACK Aug. 2o, 1946.

Filed Jan. 51, 1945 2 sheets-sheet 2 am 5 ,w n

Patented Aug. 20, A1946 SHOE SUPPORTING JACK Alfred R. Morrill, Beverly, Mass., lassignor to United Shoe Machinery Corporation, Flemington, N. Je., a corporation of New Jersey Application January 31, 1945, Serial No. 575,473

The present invention relates to shoe/ supporting jacks for use in the manufacture of shoes, and more particularly to a novel and improved construction and arrangement of the mechanism for securing the several cooperating parts of the jack in the closed shoe supporting position of the jack preparatory to and during the performance of any manufacturing operation upon the jacked shoe.

The jack herein disclosed as embodying in a preferred form the several features of the present inventionis of the general type illustrated in the Morrill Patent No. 2,331,130, dated October 5, .1.943, for a Shoe supporting jack, and in the Morrill Patent No. 2,323,346, dated, July 6, 1943, for a Machine for use in the manufacture of shoes, comprising a shoe support which is secured to a rotatable jack spindle or frame, a toe rest vertically adjustable on the shoe support, a heel support movable toward and from the toe rest, a last pin and a last pin carrier pivotally mounted in the heel support for tilting movement to engage the toe of the jacked shoe against the toe rest, toe centering grips carried by the shoe support movable toward and from each other and arranged to engage opposite sides of the toe portion of the shoe, a jacking lever, and connections actuated by the jacking lever for tilting theV last pin carrier, for moving the toe centering grips against the shoe, and for advancing the heel support to and securing the shoe firmly in position on the jack. The shoe is initially located on the jack and a corresponding adjustment of the several cooperating jacking elements engaging lthe shoe is obtained by means of a fixed toe gauge against which the shoe is brought prior to the actuation of the-jacking lever. The jacking lever is now moved by the operator to secure the shoe in the jacked position, and acts through an eccentric pawl and ratchet connection having a tightening action to draw together two slide elements, one being the heel support which is forced forwardly,

and the other being an operating ratchet for thev 11 Claims. (Cl. 12-12'7) heretofore employed, for forcing the shoe forwardly against the toe rest and for tightening the several cooperating parts to a like extent one against the other while these parts remain freely movable with relation tothe jackfsupport, has been found to have certain drawbacks. Experience has shown that it is not always possible to seat the toe of the shoe firmly against the fixed toegaug, so that the heel slide occasionally slips or is displaced forwardly during the Vsubsequent operation upon the shoe. As the toe and heel assemblies of the jack are tightened one against the other, the effect of such movement of the heel support is to loosen both the heel and toe assemblies of the jack, so that the shoe is insecurely held and may even become unjacked wthfattendant risk of injury to the shoe and to the shoe operating mechanism to which the shoe is being presented.

It is the object of the present invention to pro-V vide a novel and improved construction andarrangement of the jacking mechanism which will provide for the free adjustment of the several jacking elements with respect to one another, and will thereafter cause the jack tightening and clamping mechanism to be locked securely in the' jacking position with relation to the jack support.

More specifically, it is an object ofthe invention to provide in a construction of this general type, fastening means for the heel slide and lasting pin tilting mechanism which is unaffected by any looseness which may subsequently develop between the shoe and Xed toe gauge or inthe gripping action of the toe centering grips, and will assist to maintain the jacked shoe securely in its clamped position, Y

With these and other objects in view as may hereinafter appear, the several features of the invention consist in the devices. combinations and arrangement of parts hereinafter described and claimed, which together with the advantages to be obtained thereby will be readily understood by one skilled in the art from the following description taken in connectiony with the accompanying drawings, in which Fig. 1 is a view in elevation and partly in section of the shoe supporting portion of the jack with a lasted shoe thereon and the parts in shoe clamping position; Fig. 2 is a sectional plan view taken on the line 2'-2 of Fig. 3, to illustrate particularly the relation of the heel` slide, its guideway and the mechanism controlled by the jacking lever to secure the heel slide against its ways; Fig. 3 is an enlarged sectional, view taken on the line 3-3 of Fig. 2, illustrating particularly the heel assembly of the jack, thev 3. jacking lever and toggle connection with the heel carrier pin; Fig. 4 is a sectional view taken on Vthe line lI-li of Fig. 3, to illustrate particularly the operation of the heel slide clamping device;

Fig. 5 is a sectional View substantially similar to Y; Y Fig. 3, but on a smaller scale and with the jack Vin the open position; and Fig. 6 is a sectional View taken on the line @-LG of Fig. V5, toillustrate particularly the toe grips and their supporting and operating means.

The jack illustrated in the drawings is of theV general type shown in the patent toY Morrill No.

2,331,130 above referred to, and comprisesv generally a jack support I0 which is rigidly secured to a rotatable jack frame'or spindle indicated.

at I2. f

Y The means lfor supporting the shoe on the jack comprise a toe rest I4 and a heel support I6,` the i 48 on the bottom'face of the last pin carrier 4t. A leaf spring 49 secured to the actuating arm 44 vfor engagement against the base of the slotted portion of the last pin carrier 40 tends to rock the last pin carrier counterclockwise away from the Ytoe rest andv to maintain the ratchet teeth thereon engaged against the pawl 46.

In order to actuate the pawl toward and from the ratchet teeth and to move the pawl vin a direction to tilt the last pin and carrier, the pawl @6 is provided with projections 5t, 56 acting against avertically movable wedge 53 and a wedge supporting surface 6G on the heel support slide VIii' respectively. The wedge is connected through `apin and slot .connection with one arm of a lever 62 lon the heel support, the other arm of which is connected by means of an actuating linkV @4 with toe rest'beingr mounted on the jack frame IS' so as to becapable of vertical movement only heightwise VofA theY shoefand the heel support i beingjmovable toward andmfromlthe toe rest to accommodate shoes of diierent sizes. Y To locate the shoe in .a predetermined longitudinal positionon thee-jack.. a Xed toe gauge I 3 is protending upwardly-g from the forward end-'of tl e jack supportl.

The ltoe portion Y,of the shoe--is also located andheldin proper VpositionV on tliegjack by means of 'toejgriprsr or clamps, which toe grips are arranged Y tov move toward andjfromi each other andrto engage opposite sides `of the toe portion of theshoe; Each toe grip consists of a substantially Vvertically arranged plate 2t provided f with a depending stud fitted to rotate `ina blockV 22 Which'in turn is. pivotally mounted tc turn? `25 videdconsisting'of a block secured to and eX# onra horizontally arranged bearing pinze on the l.

jack support Iii. Each plate 2d is actedupon by a light; spring 2 5j whichptends" to rotate the 'rear l end ofthe plate inwardly toward the shoe. The l toe-grips- 2-0 arearrangedto be lmo'ved together.

Y and' are -normallypressed inwardly by spring pressed plunger's 12B-which lengage yieldingly against. ou-twardlygextending abutments on the blockst 22, andf are further lprovided with rack teeth :engaging a pinion shaft 3Q extending hori- Q zontally-acrossthejack supportY IQ. The pinion shaftf-Bisxalso arranged to mesh with a'rackin altoe grip control slide tzmounted'in a. guidewayj- 34 inthe ja'CksuppQrt 16. YA ratchet V3S formed in the under side' of the toe Vgrip controlv slide 32 is-arranged to'be engaged by aV pawl 33 carried on the eccentric hub of the jacking lever 39' mounted onV the .heel support I5. The jacking f lever 39 and pawl 38 form part of the mechanism for tighten-ingrthe jacked shoe in place,Y after more fully to 'be described.

Theheel support I6 comprises a bifurcated slide mounted to move toward and from the toe rest in guideways 4I formed on the nnder side and in rearwardlyv projecting side krails forming part oi' the jack support Ill. Upon the heel support'IS- is herein pin holeA of a shoe last. The lastrpin' carrieri:

siittedintoa vertical Slot formed in the rear end of theV heel support I5, and is mountedfupen a-horizontal pin. i2- so as to be capable ofra tiltl' ing movementA to press the toeY of ashoe down-v wardl-yy against the toe rest.

of the last pin carrier 40 isk slotted to receiveanVA The lower portion actuating arm 44- which is' pivotally supported at its upper -end upon the pin 421i The arm MI- car'- Y ries apawl 46 for engagement with ratchet teeth mounteda last pin carrier IIE) provided with an *Y upwardly projecting last pin to 'enter the last Y.

2m arm 65 0f the jacking lever 39. The actuating` arm M' is urged yieldingly in a coiu'iterclockwisev Y.

direction away from theftoe rest by means of a plunger 66 carried o-n the yheel support I5 and Y spring-pressed upwardly into engagement with a shoulder on the arm 44.

Adjustment of the Yposition of the toe Vrest I4 vertically in accordance with the size of shoe being operated upon is determined automatically bythe position of the heel support. IS by means of a connectingV rod S8, the forward endof which is arranged to slide between suitably shaped surfaces on the jack support and the under side ofv the against the stationary toe gauge IS, this movement. acting to bring Ythe several operatingparts substantially to theircloeed or jacking position. The jacking lever 33 is now moved to its closed position so-Ythat the toggle connection provided by the link 64 and the jacking lever 39 isv rendered operative to raise the wedge d8, to engage the pawl Fwith the ratchet teeth on the last pin carrier d. to forcedownwardly and tc-lock the toe portion of the shoe against the toe rest I4.'- At the same time the pawl 33 carried on the eccentric YYhub of the jacking lever is moved rearwardly with rela- Y tion thereto, thus drawing together .the toe grip control Slide 32 and the heel support I6 to further tighten the toe grips 20 against the sides'of thc ice toe, and at the same time to force the shoe still more iirmly in the forward direction against the toe 'grips EI! and xed toe gauge I3. It will be noted that all of these parts are freely movable withrelation to the jack Ysupport I0, and are moved with relationto one another against the shoe, which in turn is located only with reference to the toefgauge I3. The operation of the jacking lever as` thus Vfar described and in accordance with the illustration of the Morrill patents above referred to, causes theY several operating parts to' be'tightenedonly with relation to one another" against the shoe Y I In accordance with Vthe present invention,v an

added locking or fastening'V means is provided which is rendered operative by'movement of theA I K jacking lever 39'to its closedV orA jacking posi-V tion to secure thelieelV support directly' to theY jack. support IIJ. VFurther in accordance with jacking the shoe, theseveral the invention, the additional locking means referred to, isarranged to be rendered operativeI only after the several cooperating parts, each freely movable with respect to the jack support l0, have been tightened against the shoe. As shown in the drawings, the heel support or slide IB is'formed with two slots 10 which extend along the greater portion of the length of the slide so that the outer edge portions of the slide formed with guide surfaces for engagement with the guideways 4| may be readily sprung outwardly into locking engagement therewith. A portion of the tongue 'l2 formed by thev slots is cut away to provide an aperture 'I4 within which is mounted the jacking lever 39.` A pair of spring plates 16 mounted in the slots '.l are arranged with their ends projecting into the aperture 14, and these ends are bent inwardly to provide spring members which engage with the knuckle provided by the bifurcated end of the hel tilting toggle lever 64 at the point of its pivotal connection with the arm' 65 of the vjacking lever 39 when the jacking lever is moved to the jacking position illustrated in the several gures of the drawings. As best shown in Figs. 3 and 4, the knuckle end portion of the lever 64 is rounded or cammed at 'I8 to facilitate the movement of the knuckle between the spring members 16. As will be evident from an inspection of the drawings, the nal increment of movement of the jacking lever 39 to the jacking position will cause the knuckle formed by the pivotalL connection of the lever 64 and arm 65 of jacking lever 39 to move between the spring plates 16,`forcing Athem outwardly and thus exerting a strong outward pressure upon the two side walls of the heel support or slide i6 which causes the slide to be jammed or locked against movement on the guideways 4|, so that the heel slide is firmly xed with relation to the jack support I0.

With the construction and arrangement of the jack tightening and clamping mechanism Y above described, it will readily beseen that a more secure clamping land holding of the jacked shoe is obtained without any sacrifice in the freedom with which the several parts ofV the heel and toe assemblies of the jack `are permitted to adjust themselves in vclamping relation to the lasted shoe. Any tendency of the heel slide to be displaced forwardly as a result of increased pressure vof the shoe toe against the toe gauge or of any undetected looseness in the position of the toe grips is wholly obviated, and the risk that any appreciable loosening of the heel and toe assemblies of the jack may take place isv correspondingly reduced.

The nature and scopeof the invention having been indicated, and an embodiment of the invention having been speoically described, what is claimed is: i

1. A shoe supporting jack comprising a jack frame, a toe supporting assembly including a toe gauge Vstationary on the frame, toe grips engaging opposite sides of thefshoe toe, and a slide carried onthe frame movable to tighten said grips, a heel supporting and clamping assembly including a guideway on the frame, a heel support slide-bly mounted in the guideway to move in a direction opposite to the direction of movement imparted to the slide to tighten the shoe against the toe gauge and grips, and means including a jacking lever actuable for relatively moving said heel support and slide and thereafter to secure the heel support rigidly.

directly to the jack frame. Y

,2. Aishoe supporting jack comprising a jack frame, a stationary toe gauge on the frame, a heel supporting and clamping assembly including a guideway on the frame, a heel support slidably mounted in the guideway for movement in one direction to engage a shoe toe against the toe gauge, a toe supporting assembly comprising a pair of toe grips and a toe slide movable in a direction opposite from said direction ot Amovementiof the heel slide to tighten the toeV grips, means including a jacking lever movable to tighten said'heel support and slide one against the other relatively in opposite directions to tighten both said heel and toe assemblies, and means rendered operative by the movement of said jacking lever to rigidly secure the heel support directly to the jack frame.

A shoe supporting jack comprising a frame, a toe Vsupporting assembly including a toe gauge mounted on the frame, toe grips arranged for gripping engagement with opposite sides of the shoe toe, a heel supporting and clamping assembly including a heel support carried by the frame movable to engage the yshoe toe against the toe gaugaand control means for tightening the jack to secure a shoe on the jack comprising a ratchet 4and pawl mechanism for tightening the heel support and .shoe against the toe gauge, and a clamping device operative thereafter for rigidly 'Y clamping the heel support in its tightened position directly to the jack frame.

4 A shoe supporting jack comprising a frame, a toe supporting assembly including atoe gauge mounted on the frame, toe grips arranged for gripping engagement with opposite sides of the shoe toe, a heel supporting and clamping assembly. including a heel support carried by the frame movable to engage the shoe toe against the shoe gauge, and control means for tightening the jack to secure the shoe on the jack comprising a jacking levermovable between release and jacking positions, a ratchet and pawl mechanism actuated bymovement of the jacking lever for tightening .the-heel support and shoe against the toe gauge, and a clamping device rendered operative by the continued movement of the jacking lever thereafter `for rigidly clamping ,the heel support in the tightened frame.

5. A shoe supporting jack comprising a frame, a shoe supporting assembly including a toe gauge mounted on the frame, toe grips arranged for gripping engagement with opposite sides of the guideway to tighten the shoev against the toe gauge, and a clamping device actuated by continued movement of the jacking lever to the jacking position for rigidly clamping the heel supporti directly to the guideway.

6. A shoe supporting jack comprising a jack frame, a toe gauge stationary on the frame, a heel supporting and clamping assembly includposition directly to the jack ing a heel support movable on the frame to tighten the shoe against the toe gauge, a toe supporting and clamping assembly including toe grips and a member movable on the frame in a direction opposed to thatV of said heelsupport to tighten saidgrips against the shoe, and tighten- Y Yinfy means operablev when 'actuated to tighten said heel support and member one "against the other independently of saidframe, and thereafe :ter to secure said heel support rigidly'fdirectly to the frame.

7; A shoe supporting jack comprising a iframe, a stationary toe gauge mounted onthe frame, a toe rest, a heel support carried on theiframe rnovablertoivarci and from the toe gauge and toe rest lengthwise of a shoe supported on the jack,

Va last pin, fa last pin carrier mounted to tilt on VtheY heel support, toe centering grips movable to-Y ward and from each other arranged to engage and Y grip opposite sides of the toe portion of a shoe', a

member provided with a ratchet mounted on the frame andconnected to move with the toe grips, a Vjacking lever pivoted on the heel support Vfor movement between release and locking pos1tions,

support in the tightened shoe Vclamping position i rigidly directly to the frame. Y Y Y 8. A shoe supporting jack comprising 'a 'framed a stationary toe ,gauge mounted on the frame, a

Vtoe rest, a heel support carried on the frame movable toward and from lthe toe gauge and the toerrest lengthwise of a shoe supported on the Y jack, alast pin, alast pin carrier mountedv to tilt on the heel support, toe centering grips movable toward and from each other arranged to engage and grip opposite sides of the toe portion of a shoefa member 'carried on the framefand'conj nected to move with the toe grips, said heel sup` port and"memberfbeinggarranged for movement relativelyfor tightening the heel, support and toe gripsrespectiveiy, a jacking lever, means actu? ated by the jacking lever` for tilting the'last, pin

V toio'r'ess, Vthe toe of a lastedshoe placed on the jackagainst the toe rest,tightening means actuated `by the jacking lever for relatively moving," the heel support and member to tighten the same Vone against theL other, ,and means actuated by the jacking lever for securingv the heel'rsupport to the frame in the tightened position.

9. A shoe supporting Vjack comprising afname,-

a toe'supporting assembly includinga toe Vgauge stationary on theV frame, andtoe grips Yarranged for gripping engagement With vopposite Vsides of theV shoe toe, a heel supportingandwclamping Yasi sembly including a Yguidevvayon thev vfrarnefand aheel support slidably mounted in said g'uideway Yfor movement longitudinally of the shoe to engage Y 8" movable between release and jacking' positions', tightening means rendered operative by Ymovement of the lever toward jacking position forV` moving the heel support on thel guideway to tighten the shoe against the toeV gauge, and a clamp'- ing element associated with the jacking lever-Tar-v ranged uponf'movement ofthe jacking lever to the jacking Vposition to move vbetween and ex said slide elements against the guideway.

flo. 1A shoe supporting jack comprising a frame,v Y

a toe supporting assembly including agtoe'gauge stationary' 0n thev frame, and toe grips arranged for gripping' engagement {With opposite sides of the shoe toe, a heel supporting and clamping assembly including'a guideway on the iframev and a neel support slidably mounted in saidguide'- for movement longitudinally of the'shoe to engage the shoe toe againstV the toe gauge, said yheel support being slotted from one' end along:V a substantial portionof its length to'provide a' pair of iiexible' slide elements @for engagement within the guideway and with 'an aperture formed Y therebetween, a pair of spring members supported' with relation 'to said slide elements y Withinsaid aperturaand control means for tighteningztheV jack to Asecure* the shoe on Vthe jack comprising'v a jacking'leve'r mountedon thefheelsupportmov--y able between release and jacking positions, tight-V ening means rendered operative by movement off Y f the lever toward jacking position for moving the heel support on the guidevvay to' tighten the sho'e againstthe toe gauge, and a cla'mpingfelement j actuated by continued movement of theja'cking r lever to the jacking position to engagesaid spring members in said aperture;` to force the flexible slide elements against the-guideway.- f-

Y li. A'Y shoesupportin'gfjacke,comprising a= frame, a stationary `toe gauge jmountedonVV the frame', a toe/rest, a guideway on the frame,fand

a heel support slidable in the'guideway,andfbifure cated'along a substantial portion ofV its length-to provide relativelyl flexible slidek elements for.y en-V gagement with the guidewayj for -movement to-V ward and from the-toe gauge and toe rest length'- vvise of a shoe supported on the jack, a lastpin,

'K a lastrpin carrierfmountedto tiltV Aon they heel slideftoe centering grips movable .tovvardand from'each other arranged to engagefandgrip op-- 'posite'sides of the -toe portion cfa shoe,ia mem-f berrprovided With a ratchet mountedon the frame and connected tomove with the toe grips, a'jackfV ing llever pivotedon said bifrurcated heel support j for movement between release and locking posi- Y tions,-connections including an arm having a piv-g the Yshoe toe against the toe gauge,V said heel'VY support being` slotted -from one end along a substantial portion' of its length Vto providera pair ,Y Y of iiexiblerslide elements'for,engagementvvithin Y theguideway, andY control means for tightening the jack to secure the shoe on the jack compris-fV i ing a jackingVY lever carried on the' heel support otal connectionwith the jacking lever for tilting the last pin to press the Ytoerof the lasted -shoe placed Onrthe ja'ckv against the toel rest, 'a pavvlr cooperating With said ratchet Vandarranged to'be actuated Iby the jacking lever-for relatively-moveing ,the lever and heel support to tighten the grips4 and to VVtightenthe shoe against the toe gauge' and grips, and a locking device comprising a pair of spring armssupported with relation torsaid flexible slide elements and arranged to be actedYV p' upon by said pivotal Vcormection uponmovement of the jaokn'g'leverrto the locking'position to," 'relatively flex said slide elements against thev gudewayY for securingthe heel supportvin thel l tightened shoe clamping'position rigidly Vto the i 7oVV 'Y f Y

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