US2651063A

US2651063A - Lasting machine

Info

Publication number: US2651063A
Application number: US152876A
Authority: US
Inventors: Roscoe L Hill; Robert W Ireland
Original assignee: United Shoe Machinery Corp
Current assignee: United Shoe Machinery Corp
Priority date: 1950-03-30
Filing date: 1950-03-30
Publication date: 1953-09-08
Anticipated expiration: 1970-09-08

Description

Sept. 8, 1953 R. 1.. HILL in AL 2,651,063

LASTING MACHINE Filed March so, 1950' 4 Sheets-Sheet 1 In vemom R. L. HILL ET AL LASTING MACHINE Sept. 8, ,1953

4 Sheets-Sheet 2 Filed March 30, 1950 2 37 mfw 1% n /a mi 2 Sept. s, 1953 R. HILL ET AL 2,651,063 I LASTING MACHINE Filed March 50, 1950 4 Sheets-Sheet 5 {'9 Invenzors Roscoe LHL'ZZ Pobert l l/freland B if) Afi' 5 car Qrng Sept. 8, 1953 R. HILL El AL 2,651,063

' LASTING MACHINE .Fild March so, 1950 4 Sheets-Sheet 4 Patented Sept. 8, 1953 UNITED STATES PATENT OFFICE LASTIN G MACHINE Application March 30, 1950, Serial No. 152.876

9 Claims. (CI. 17.5-12.4)

This invention relates to lasting machines and more particularly, in some aspects, to machines for lasting the toe ends of shoes. The invention is herein shown as embodied in a machine the construction of which is in many respects such as found in bed-lasting machines of a well-known type exemplified by the disclosure of United States Letters Patent No. 1,018,477, granted on February 27, 1912, on an application of Matthias Brock, but it will be understood that it is not lim ited to this illustrative embodiment.

In the use of a machine of the above-mentioned type toe-embracing wipers are moved upwardly to wipe the toe-end portion of the upper heightwise of the last by movement of a doubleacting treadle in one direction while they are held by the operator in effective wiping engagement with the upper through a hand lever, and thereafter by this hand lever they are further advanced and closed to wipe the marginal portion of the' upper inwardly over an insole on the last. Each of the above operation may be repeated one or more times until conditions are satisfactory to the operator. After the wipers have thus wiped the upper inwardly over the insole they are forced down on the shoe bottom to apply compacting pressure to the overwiped marginal portion of the upper by reverse movement of the double-acting treadle. It has been found advantageous for the operator thus to have full control of the wipers in wiping it heightwise of the last and inwardly over the insole, so that he may observe the results as the lasting operation progresses'and may subject the upper to such special treatment as may be required. After the inward wipe, however, the application of increased pressure to the upper is not a critical operation, but requires only the use of substantial force. The present invention accordingly provides novel means whereby the Wipers are operated by power to apply their compacting pressure to the overwiped marginal portion of the upper, but are nevertheless under such full control of the operator as he has exercised heretofore in the wiping of the upper heightwise of the last and inwardly over the insole. For the purpose in view, the construction herein shown includes a fluid-operated piston which is rendered effective thus to force the wipers down on the shoe bottom by fluid pressure in response to reverse movement of the above-mentioned double-acting treadle after the wipers have been moved upwardly by the treadle and have been operated to wipe the upper inwardly. Preparatory to this action of the piston it is moved upwardly with the wipers 2 as the wipers are raised by the treadle to wipe the upper heightwise of the last. To relieve the operator, however, of the necessity of thus raising the piston by the treadle against resistance of the operating fluid, which would require the application of considerably greater force to the treadle and would render it difiicult to control the wipers as desired, provision is afforded for raising the piston instead by fluid-pressure but under such control that its upward movement is an idle movement without any effect on the Wipers. More particularly, the construction shown includes a valve mounted in the piston for upward movement by the treadle to initiate the upward movement of the piston by the fluid and further movable upwardly thereafter with the piston to cause the piston to continue its upward movement and means affording provision for lost motion between the piston and the wipers to permit limited upward movement of the piston relatively to the valve, the piston having means arranged to cooperate with the valve to interrupt the flow of the operating fluid acting thereon within the range of such lost motion and thus to prevent any effective action of the piston on the wipers. 1

The above and other features of the invention, including various novel details of construction and combinations of parts, will now be more particularly described with reference to the accompanying drawings and thereafter pointed out in the claims.

In the drawings,

Fi 1 is a view in front elevation of the machine in which the invention is herein shown as embodied, parts being broken away;

Fig. 2 shows a portion of the machine in lefthand-side elevation;

Fig. 3 is a plan view of a portion of the machine, showing the toe wipers in positions'over the shoe bottom;

the, upward movement of the toe wipers; and

Fig. 8 is a view similar to Fig. 7 with the parts in the relation assumed when the wipers are to be forced downwardly on the shoe bottom.

The machine includes a frame '2 on which is without any heel-lasting means, and it will he understood that, similarly to the disclosureaof the above-mentioned Letters Patent, it is swung rearwardly to an adjustably predeterminedepo sition when the machine is -to operate ona right shoe and forwardly to"the appropriate position when the machine is to operate on a left shoe.

Secured on the casting 6 in fixed relation thereto is another casting 8 which, through" means hereinafter described, supports a heel hand I0 for-"embracing and clamping th'e shoe' about its heel ends- The shoe is sopportedsat' itsheel end on a rjack 'lz inclsuding 'a ui-shap member 13 one-orthe armsoi which' has a-'hori zontal extension I 4 -"guided" for-movement's in: directions lengthwise 1 ofthe :shoe m the wasting- 6. This extension I has on-its upper 'fabe rack teeth 16 engaged "bya-piniori' l 8 which': is rotaF- table on thecastingt and is-tu-rne'd' by'aha-nd' lever 20 'to-efiect a-preliminary adjustihent of the jack relatively to 'the heel band I01 A spring-pressed pin zzziomtnehenuuever is ar-- ranged to enter anyone ofa plurality of holes-- Z l'in the casting-8 to'retain the jack iri-adjusted' position. The adjustment:.. 1 preferably, SUCH that when the'shoe -is first mounted on the jack there is substantial clearance =betvl een 'its heel" end face and'the intermediate portion of the open band I as illustratedi1i*1 *ig.=42 'Ilile left mounted therein an upwardly-*extending' post- 2 G' which, similarly to the "post w showm inLett'ers Patent-=No;' 373,482, granted-ion -April 5, 19.22 on an application -of Matth-ias Bfbcki can-tip yieldingly in directions 'wi'dthwise of i the shoe against the resistance of opposed leaf springs' 'on the member"! 3, one of -thesesprings being shown at 28. Pivotally mounted on a' pin 3lf in thepost 2E to tip directilz ns wicitliwise of tlieshbe relatively to the'postdsablock 32 h is. -yie1CI- ingly controlled at: its lower end ya spring pressed pin (not shown) acting similarly-tonne member i9 shown in Letters Patent NOZAIJZS-ZSGS, granted on February 16; 19-151 on' an application of J. Fausse: In the 'construction herein 'showrr there is pivotally' mount'ed fon'i the -block -fl to: swing about a .pin 34 extendingewidthwisapi the shoe a block 35 provided with an upwardly ex tendinglast pin"38 arranged'to eriter the usual spindle .hole': in? .the- -=heeli end of t th'e lasti spring 4!! connected to the post 25 and the*b1ock 36 tends to swing th'e b1ockan d the last pin '38 in a clockwise "direction as vie wed in Fig: 1 "and holds them initially'in "positions-determined by V a stop screw 42 Whichis threaded"in"th block 35 and is arranged to bear against the upper end of the post 26.

The intermediate portibnpfthe'heehband I 0 is secured to a-h0lder"44- (Fig; 4)""havinga-stein 46 held by a setscrew Ml in' a yoke-'shaped-mem her 50." This member is secured "murmur to J a plate 52 (Figs5) guided for movements-in directions lengthwiseoathe shoe-in the'casting 8; Secured by screws 54' tothe' plate" 52 tc'rmove ingly mounted a rod 58. Pivotally mounted on a stud 60 on the left-hand end of the rod 58 is a crossbar 62 the opposite ends of which are con nected by links 64 to slide bars 66. These slide bars are guided in recesses in the opposite ends of the yoke member 50 and at their left-hand ends are 'pivotallyfconnectedby pins .-s's':?to levers 'lfi in 'locationsbetween the -'ends of the levers. The inner ends of the levers are pivotally connected by pins 12 to blocks 14 fast on the oppo- SitB-SidGS-Of the heel band In and their outer ends areco'nnected to springs 16 which tend to swing the'ini inneie. ends-: inzzdirections toward the toe end efi thaslioe. Formed on the slide bars 66 arecam faces'l ranged to be engaged by abutmerit feices 'au on the yoke member 50 to close the=heel1ebandeinwardly against the sides of the shoe in response to lengthwise movements of the slide bars relatively to the yoke member, in which operation the levers 10 are swung about the :pinafi 8 against therzresistance of the ssprir'igs 163:: Such: lengthwise :movementsof': the:- slide: barsffare-zefieeted byymoviiigg the" rod 58' toward: the deft relatively: .to .the block :56- and the plate 52.:to .whichnthesyolre member" 50 is. secured; Priors-to ;this -operation, however," the heel band" is: moved bodily. lengthwise of the shoe to seat it firmlyr'against the fhe'el-endtface of= the. shoeby movingthe block56-':with the rod 58. For this" purpose ztherec-is'.:mounted 'onthe rod; between the block 56 and amember- 82 fast on the right handnend-of the rod; arr-compression-springs-84. Themember- 82 acts' through the spring 84 thus to move the block 56 untilfurtherbodilyi move mentor: the 'heelband is prevented by the shoe, 1 after? whiclrthe spring yields and :furthermove-"- ment' of :the member 82 serves to move the rod 58 relativelyt-"to the block: 56" to close :the heel band;:. To operate the-member 82 it has extend ing througlr itra;rod-85-:(Figs. 1 aud t) onwhic-h is mounted acompression spring 88 located .be k tweenrthe: member" 82- andaa :plate 90- confined: onithez'right hand end 'of the rod by a nut 92;: l A head 94-formed .on-the left-han'd I end of' thetrod engages the memberr82* to limit: expansion :of the spring-r Portions: of: thH'TOd-x and the springzare I broken awayimFigsa: lands. The head-94 cm? the rodaisiconnected by a :lihk 96 :to athe' upper.

end offa lever BS-Whichis pivotally mounted on the-casting hand has azsdownwardly extending 1 arm Hill-engaged "by oneaend ofla' push :rod 102;

The othera'end of: this-push?rod=is engaged and operated-abyzauleyer I04 pivotallymounted ion: a i pin I06 on the casting 6. This-lever is a poweroperated lever; :but the mechanism, including a cam, for .operatingit; '.is' not herein shown, since it: i-is-tof': the same construction as mechanism provided :heretofore in machines of'the type showniin Letters Patent No. 1,018,47Tfor closing ,the heel band, as disclosed especially in Letters Patent No. r 1,417,493, 1 granted on May so; 1922, on 'an application of Matthias Brock. The lever i 0'4corresponds to the lever'122 in'the last-mentionecl "Letters Patent; It will be understood thitt-thespring 88 is stronger than the spring 84 and'mayyield only in'response to "resistanceof the shoe to the closing of the heel band. The 1e'ver"98 is' operated against the resistance of a returnspring H38" whichassists in returning parts operated by the lever to their initial positions; are returnedby the head 94' of the rod'BB, and

the block '56 -'is" returned by engagement'ofthe crossbar 62 therewith;

The toeend of the-shoe is-supp-ortedon' a 'toe That is; the member 82 and the rod 58 rest I I mounted on the upper end of a vertically movable rod II2, this rod being supported at its lower end on a member II 4 corresponding to the member 22' shown in Letters Patent No. 1,018,477. By means of a power-operated cam (not shown), which corresponds to the cam 180 shown in Letters Patent No. 1,417,493, the memher 4 is moved upwardly to elevate the toe rest a predetermined distance in time relation to the operation of the heel band I 0. In this manner the toe rest cooperates with the heel band in jacking the shoe and in positioning the toe end of the shoe heightwise in proper relation to the toe-lasting means. It will be understood that as the parts are shown in Fig.- l the jacking of the shoe and the operation of the heel band have not as yet taken place.

When the heel band I0 is moved bodily as hereinbefore described to seat it against the'heelend face of the shoe it imparts a short lengthwise movement to the shoe to cramp the heel pin 38 in the spindle hole in the last, the heel pin swinging about the pin 34. This oauses'the heel pin to'assist in holding the shoe firmly against any upward movement of its toe end in the toelasting operation. To afford additional insurance against any displacement of the shoe lengthwise in a heelward direction in the toelasting' operation, mechanism is provided for positively locking-the heel band against retractive movement. For this purpose a pair of pawls II6 (Figs. 4 and arranged in staggered relation are pivotally mounted on a pin I I8 supported on a block I20 which is secured to a top' plate I22 on the'casting 8. A spring I24 tends to swing the pawls downwardly, and forthe purpose in view they are arranged to engage teeth I26 formed on a plate I28 which is secured by the.

screws 54 to the plate 52. Each pawl is provided with a roll I30 arranged to rest on the top face of a horizontal bar I32 slidingly movable in a guideway in the block I20 and secured at its right hand end to the previously mentioned plate 90 which is carried by the rod 86. By engagement of the top face of the bar I32 with the rolls I30 the pawls are held initially upraised, as shown in Fig. 5, but as the bar is moved toward the left in the operation of applying the heel band to the shoe inclined faces I34 on the bar arrive in positions under the rolls I30 and permit the pawls to be moved downwardly into engagement .withthe teeth I26. It will be understood that inthe return of the parts to starting positions the pawls are disengaged from the teeth by the inclined faces I34 to release the block 56.

The toe-lasting mechanism includes toe-em bracing wipers I36 (Fig. 3) which are advanced and closed about the toe by a hand lever I38 in the same manner as in prior machines of the type shown in Letters Patent No. 1,018,477.

Means provided for adjusting these wipers in various ways are also generally the same as heretofore in such well-known prior machines and need not be described in detail. The wipersand their adjusting means are supported by a bed plate 140 formed on the upper end of a slide I42 vertically movable in a guideway in the frame. Downward movement of theslide I42 is limited by engagement of the bed plate I40 with a stop plate I43 secured to the frame. For moving the wipers upwardly to wipe the toe end of the upper heightwise of the last the slide I42 is raised by for the convenience of the-operator, .it' is. so

by an electric motor I95.

of the machine instead of parallel to the front of the machine. The treadle is fast on a rockshaft I46 which carries a small lever I48 connected by a link I50 to another lever I52, this lever being connected to an upwardly extending link I54. Since the treadle-operated means for moving thewipers upwardly is associated, in the machine herein shown, with fluid-operated means hereinafter described for forcing them downwardly when they are over the shoe bottom, the link I54 is pivotally connected at its upper end to across-rod I56 (Fig. 2) the opposite ends of which lie in vertical slots I58 formed in the lower ends ofa pair of links I60. At their upper ends these links are connected to 'a cross-rod I62 mounted in ears I64 formed on the lower-end of the slide I42. Springs I 66 connected to the crossrod I56 hold it normally at the upper ends of the slots I58. Accordingly, depression of that arm of the treadle on which the operator rests the forepart of his foot serves to raise the slide I42 through the link I54,the cross-rod I56, the pair of links I60 and the cross-rod I62.

:Secured to a bracket I 68 on the frame is a vertical cylinder I10 in which is a piston I12 (Figs. 7. and 8) provided with a diametrically reduced portion I14 extending upwardly through a bore in a cylinder head I16 and having at its upper end a vertical slot I18 through which extends the cross-rod I62 (Fig. 2). Extending downwardly through the piston I12 from near the upper endof its reduced portion I14 is a bore I in which is slidingly mounted a tubular valve I82 extending downwardly through'a lower cylinder'head I84. Threaded on the lower end of the valve is a coupling I86 (Fig. 2) and threaded in this coupling isa stem I88 by which the valve is connected to the cross-rod I56. Communicating with a port I90 in the cylinder head I16 is a tube I92 which leads from a pump I94driven The pump receives fluid, preferably light oil, from a reservoir or sump I98 and delivers it through the tube I92 to anannular chamber 200 in the cylinder I10 above the larger portion of the piston I12, the fluid in this chamber being thus maintained under pressure at all times. It will be understood that the excess fluid delivered by the pump returns to the sump past a spring-controlled relief valve (not shown). Initially the piston I12 is in its lowest position (Fig. 7) with a hollow cap 202 secured to its lower end in engagement with the cylinder head I84.

Formed in' the larger portion of the piston I12 are four inclined ports 204 (Figs. 6 and 7) communicating at their lower ends with horizontal ports 206 in the piston, and these horizontal ports are at all times in communication with an annular chamber 208 in the valve I82.

Four other horizontal ports 2I0 in the piston below the piston. The valve I82 has therein a bore 2I4 extending downwardly through it from'near its upper end and communicatin through ports 2I6 and 2I8 with an annular chamber 220 around the valve. At its lower end the bore 2I4 in the valve is in communication through the coupling I86 with a flexible tube 222' (Fig. 2) leading to the sump I98. To permit the escape of fluid which may leak-pastthe valve I82 into the portion of'ithe bore I80 above 3' 9 to by the operatona fluid-operated member for moving the wipers reversely heightwise of the last by fluid pressure to increase their pressure on the upper-after they have wiped it-inwardly over the bottom of the last, said fluid-operated member being mounted to move heightwise of the last with the wipers when the wipers are moved -to move said wipers, a fluid-:operated member 'for m net e w pe s. r ve e y he i f the 'last by fluid pres ure to increa e their pre sure -onv the upper atter they have :wiped it inwardly over the -bottom of the l ast, said fluid-operated "memberbeing mounted to move heightwise of the last with the wipers when the wipers are moved by the operatorjnthat direction, a valve for applying pressure to said fluid-operated membertomove it heightwiseof the last as the vw p rs re ump esi he Operator, n means providing for lost motion between said fluid-operated member and the wipers to permit limited movement of that member heightwise of the last relatively to the wipers, said valve being constructed and arranged to interrupt the flow of fluid acting on said fluid-operated member in response to such movement of that member relatively to the wipers and thereby to prevent the fluid-operated member from acting on the wipers in the wiping of the upper heightwise of the last.

3. In a lasting machine, wipers for wiping the marginal portion of an upper about the toe end of a last inwardly over the bottom of the last, said wipers being mounted for movement heightwise of the last to wipe the upper first in that direction, a treadle movable by the operator thus to move said wipers, a fluid-operated member for moving the wipers reversely heightwise of the last by fluid pressure to increase their pressure on the upper after they have wiped it inwardly over the bottom of the last, said fluid-operated member being mounted to move heightwise of the last with the wipers when the wipers are thus moved by the treadle, and valve means controlled by the treadle for applying to said fluid-operated member only such fluid under pressure as to move it idly heightwise of the last as the-wipers are moved in that direction by the treadle.

4. In a lasting machine, wipers for wiping the marginal portion of an upper about the toe end of a last inwardly over the bottom of the last, said wipers being mounted for movement heightwise of the last to wipe the upper first in that direction, a member movable by the operator thus to move said wipers, a fluid-operated piston for moving the wipers reversely heightwise of the last by fluid pressure to increase their pressure on the upper after they have wiped it inwardly over the bottom of the last, said piston being mounted to move heightwise of the last with the wipers when the wipers are thus moved by said member, a valve movable by said member for applying fluid pressure to said piston thus to move it heightwise of the last as the wipers are moved in that direction by said member, and

on 1th'e1upper after they have 'overthebottom of the last, said piston being mounted to move heightwise of gwipers when'the wipers are thus moved by the treadle, a valve movable initially by said treadle for -applying fluid pressure to said piston to move itheightwise of the'last as the wipers are moved means vproviding tor lost motion between said piston and the wipers to permit limited movement of the piston heightwise 'of the last relatively to the wipers, the piston being formed to cooperate with said valve to interrupt the flow of fluid for operatingthe piston within the range'of such lost motion and thereby to render the piston ineffective on the wipers inthe wiping of the upper heightwise of the l'asti v '5. alasting'jmachine, wipers for wiping the 'mar'ginal'portion or an upper about the toe end of a last] inwardlyoverthe bottom of the last,

lsaid wipers beingmounted for movement heightwise or the last to wipe the upper first in that direction, a treadlemovable by the operator thus to move'jsaid pwipers, afluid-operated piston for Imo g 'the pwipers f reversely heightwise of the last jbyiflu d pressure to increase their pressure wiped it inwardly the last with the in that direction by the treadleand further movable by the treadle heightwise of the last with pistontqma'intainsuch pressure on the piston, ;and=-m ea ns providing for lost -piston' and'the'wiper s to permit limited movemotion' between said ment of the piston heightwise of the last relatively to the wipers, the piston being formed to cooperate with said valve to interrupt the flow or fluid for operating the piston within the range or such lost motion and thereby to render the piston ineffective on the wipers in the wiping of the upper heightwise of the last.

6. in a, lasting machine, wipers for wiping the marginal portion or" an upper about the toe end of a last inwardly over the bottom of the last, sa d wipers being mounted for movement heightw se of the last to wipe the upper first in that direction, a treadle movable by the operator thus to move said wipers, a fluid-operated piston for moving the wipers reversely heightwise of the mounted to move heightwise of the last with the wipers when the wipers are thus moved by-the treadle, a valve in said piston movable by the treadle for applying nuid pressure to the piston thus to move it heightwise of the last as the wipers are moved in that direction by the treadle, an means providing for lost motion between said piston and the wipers to permit limited movement of the piston heightwise oi the last relatively to the wipers, the piston having therein one or more passageways to be closed by said valve for interrupting the flow of fluid I'or operating the piston within the range of such lost 1611332211 and tflor thereby rendering the piston iniveon ewi ersint heightwise of the last. he Wlpmg OI me upper 7. In a lasting machine, wipers for i marginal portion of an upper about tlYe ti i e e r i of a last inwardly over the bottom of the last said wipers being mounted for movement height wise of the last to wipe the upper first in that direction, a member movable in one direction by the operator thus to move said wipers, a fluidoperated member for moving the wipers reversely heightwise oi the last by fluid pressure to increase their pressure on the upper after they have wiped it inwardly over the bottom of the last, and a