US2589412A - Lasting machine - Google Patents

Description

March 18, 1952 s. MACDONALD LASTING MACHINE 3 Sheets-Sheet 1 Filed Oct. 5, 1949 llll'l Il nvwliliiailnlu lalll vgr In 1) e r2250? Leszfr 6. Macaonald Match 18, 1952 L. S..MACDON'ALD LASTING MACHINE 3 Sheets-Sheet 2 Filed Oct. 5, 1949 v 5 hm m W n w 1 MW Z March 18, 1 52 L. s. MACDONALD LASTING MACHINE 5 Sheets-Sheet 3 Filed Oct. 5, 1949 .[nventar Lester S. Macdonald Patented Mar. 18, 1952 UNITED STATES PATENT OFFICE LAST'IN'G MACHINE Lester S. Madonna; Beverly, Mass;- assign'or to United". Shoe. Machinery Corporation; Flemington, N. J a corporation of: New Jersey Application October 5, 1949;,seria1Na11a59i TCIaims.

This invention relates tolasting machines, and more particularly to means for operating wipers to last end portions of shoes in such machines. The invention is herein shown as embodied in a modification of a toe-lasting machine constructed as disclosed in an earlier application of mine; Serial No. 11,912, filed on February 28, 1948, but it will be understood that it is not limited to this illustrative embodiment.

The machine shown in the above-mentioned application is provided with toe-embracing wipers which are advanced lengthwise of the last and are closed widthwise of the last around the toe preparatory to the wiping of the" upper heightwise of the last and are thereafter further advanced and closed to wipe the marginal portion of the upper inwardly over an insole on the last. After the wiping of the upper over the insole,

tackers which are moved independently of the- Wipers to positions over the shoe are'operated to drive tacks through openings" the wipers to secure the upper in lasted position. To" advance the wipers as above described a wiper carrier on which they are supported is moved lengthwise of the last by a cam-operated lever connected'to the carrier by special meanson'thelever where by the limit of the movement of thewipers lengthwise of the'last prior tothe wiping of" the upper heightwise of the last may be varied with"- out affecting the limit of their movement thereafter over the insole.

The construction above described has been found to operate satisfactorily under mostc'onditions. In operating, however, on very heavy upper materials the resistance of" the upper to theadvance of the wipers in wiping its marginal portion inwardly over'the insole may cause the mechanism for operating the wiper carrier; by reason of its construction, to'spring slightlyand thereby to prevent the wipers'from' arriving at the intended limit of their'movement lengthwise of the last. In the organization shownthismay undesirably affect the alinement of the tackers with the openings in the wipers' through' which the tacks are driven. The present inventionac cordingly provides, in addition to means'fornormally advancing the wipers lengthwise" of the last to a predetermined limit ofmmrement" in the wiping operation, means. for insuringcorn pletion of the movement of the-wipersto' the limit thus determined regardless of the-resist"- ance of the upper materials. In the construction shown-this additional means comprises a pair'of cams'arrangedto act positively'onthe wiper car-*- rier independently of the above-mentioned lever near; the end of the wiper-advancing movement of the lever to complete the movement of the carrier if conditions are such that it is notmoved to the required limit by the lever.

The novel 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 drawingsand thereafter pointed out in the claims.

In the drawings;

Fig. 1' is a view in right-hand'side elevation of the upper portion of the machine in which the invention is shown as embodied;

Fig. 2' is*aview partly in right-hand side elevation andpartly in vertical section, showing the wiper operating' mechanism;

Fig: 3'" is mainly a plan'view showing the wipers and'ap'ortion of their operating mechanism;

Fig. 4 is a detail view in right-handside elevation' ofa portion of thestructure shown in Fig. 2;

Fig. 5 is'a view also-in'right-hand side elevation of' another portion of the structure shown irrFig; 2; with the parts in different positions; and" I Fig; 6 is'a vertical sectional view illustrating how'the-tacksare driven through openings in thE'WiDtfQIS:

In view of the disclosure in the above-mentionedapplicationonly as much of the machine as-it is necessary to refer to'for an understanding of thepresent invention will be herein described in detail; For wiping the upper around the-toe'end of the last heightwise-of the last and for thereafter wiping its marginal portion inwardl'y over aninsole on the last the machine is provided with a pair of toe-embracing wipers 2' detachablymountedon wiper holders 4 which are supported on a wiper carrier ii under a cover plate 8 onthecarrier and are each provided with a downwardlyextending curved rib l0 (Fig. 2) l'y-ihginacorrespondingly curved guideway l2 (Fig. 3) in the carrier to guide the wipers for closingmovementwidthwise of the shoe; the shoe being supported" and controlled by means fully disclosed in'- the above-mentioned application. Thew-ipercarrierfids supportednear its front end for'mov'ementsf to advance and retract the wipers-Bodilylengthwise ofthe last and shoe on apa'lrof'link's [4 (Figs. 1 and 2) which are spaced apart widthwiseof the shoe and are pivotally connectedat their upper ends to lugs on the carrier; thelowerends of the links being supported bymeans hereinafter described. Near its rear end the wiper carrier is further supported by a 3 lever it through which it is moved in directions lengthwise of the shoe, this lever being mounted to swing about a shaft l8 supported on the frame of the machine. At its lower end the lever It carries a roll 20 engaged by a groove cam 22 on a cam shaft 24. The upper end of the lever I is not connected directly to the wiper carrier 6, but is connected indirectly thereto through means which will now be described. Pivotally mounted on a stud 26 on the upper end of the lever is a bell-crank lever 28 having a rearwardly extending arm 30 pivotally connected to the upper end of a rod 32 which extends downward 4 upper inwardly over the insole is completed the roll 5'5, whatever may be the adjustment of the cam, arrives in a position where it is engaged by a portion 1) of the cam which is concentric with the axis of the shaft l8. Accordingly, the limit of the forward movement of the wipers over the insole is invariable regardless of the adjustment of the cam. Normally the spring 49 does not yield, and accordingly the bell-crank lever 28 case, however, the wipers in their forward moveloosely through a bore 34 formed in a projection 36 on the lever [6. Between this projection: and

a head 38 on the upper end of the rod is a comend of the rod are nuts 42 which hold the spring normally under compression. Pivotallymounted on a stud 44 on an upwardly extending arm" 46 of the bell-crank lever 23 isanother bellcrank lever 48 having an upwardly extending arm 56 pivotally connected by a rod 52 to the rearend portion of the wiper carrier 6 and supporting this portion of thecarrier. A- rearwardly extending'arm 54 of the bell-crank lever 43 has thereon a roll 56 engaged by'agroove cam 58 formed by two plates 60 and 62 (Fig. 4) secured on an arm 64. This arm is fast at its lowerend on the shaft I8 which is mounted to turn in bearings in the frame. Through a rod 65 and other mechanism not herein shown but fully disclosed in the earlierapplication the arm 64 is movable to adjust the cam 58 in directions lengthwise of the shoe but'is held stationary during the operation of the machine on the shoe.

When the lever I6 is operated by its cam 22 to advance the wiper carrier and the wipers lengthwise of the shoe, it carries the two bell-crank levers 28 and 48 bodily with it and in this mantheposition'of the bell-crank lever 48 with respect to turning movement about the stud 44 being determined by the stationary camv 58. When the wipers-are advanced and-closed about ner imparts the movement to the wiper carrier, r

the toe prior to the wiping of the upper heightthe cam 58 engages the roll 56 and'thereby swings the bell-crank lever 48 in a counterclockwise direction with reference to Fig. 2 about the stud 44, thus imparting to the wiper carrier and the wipers additional forward movement-the extent of which is determined by the adjustment of the cam' 58. ,That is,-adjustment of the cam in a rearward direction serves to increase the amount of forward movement imparted to the wipers, since more of the inclined portion a of the cam is effective to swing the bell-crank lever 48 about the stud 44 before the lever [6 comes to a stop, and conversely adjustment of the cam in a forward'direction reduces the amount of swinging movement imparted to the bell-crank lever. This construction permits the positionsof the wipers lengthwise of the last at the time when they wipe the upper heightwise of the last to be readily varied in accordance with the character of the-upper materials. When the lever- [6 is further operated by its cam',.after the wiping of the upper heightwise of the last, to cause the wipers to wipe the marginal portion of the upper at the end of the toe inwardly over the insole, the bell-crank lever 48 may or may not be further swung about the stud 44 by the inclined portion a of the cam 58, depending upon the adjustment-of the cam. Before the wiping of the ment encounter abnormal resistance, the spring may yield to permit the wipers to stop While the lever it continues its movement, thus avoiding any-dangerof damage to the machine or to the shoe.

The previously mentioned links M which support the wiper carrier 6 near its front end are pivotally connected at their lower ends to short arms 88, one of which is shown. in Fig. 1 and the other in Fig. 2, these arms-being fast on a rockshaft is on which is also secured an arm 12 provided with a roll 14 engaged by a groove cam I6 a fragment of which is shown'in dotted lines in Fig. '2. It will be understood that by this mechanism the wiper carrier is swung upwardly about the axis ofthe rod 52 to cause the wipers to wipe the upper heightwise of the last and is'later swung downwardly to increase the pressure of the wipers on themarginal portion of the upper over the insole. a

. For imparting to the wipers closing movements widthwise of the shoe the wiper holders 4 are connected through links 18, more fully shown and described in the earlier application, to a slide (Fig. 2) guided for movements lengthwise of the shoe on the wiper carrier'fi. Secured to the slide 80 is a rearwardly extending rod 32, and confined by a nut 84 on the rear end of this rod is a member 86. Between this member and the slide 80-is a spacing sleeve 88 on the rod 82. Pivotally connected to opposite sides of the member 86, as more fully shown in the earlier application, are forwardly extending links one of which is shown in dotted lines at 90 in Fig. 2, the front ends of these links being pivotally connected to the bifurcated upper end of an arm 92 of a bell-crank lever 94 pivotally mountedat 96 on lugs extending downwardly from the wiper carrier 6. A rearwardly extending arm 98 of this bell-crank lever is connected by an adjustable link N10 to an arm I02 fast on a rockshaft !04. Also fast on this rockshaft is an arm I08 provided at its lowerend with a roll I08 engaged by a groove cam H0 on the cam shaft 24. It will thus be seen that by the action of the cam M0 the bell-crank lever 94 is operated to impart wiper-closing movement to the slide 80 in proper timerelation to the advancing movements of the wipers lengthwise of the shoe. As explained in the earlier application, the limits of the closing movements of thewipers are positivelydetermined. EAfter the marginalportion of the'upper has been wiped inwardly over the insole by the wipers and while it is held by the wipers it is secured to the insole by the driving of tacks through 0penings H2 in the wipers, as-illustratedin Fig; 6. For this purpose there are provided two tackers I I4, one for each wiper, and means whereby they are operated to drive the tacks successively in tracted positions forwardly and downwardly to positions where they will aline properlywiththe openings H2 in the wipers by a tacker support H6 (Fig. 1) which is pivotally mounted at it"srear end for swingin movement heightwise 'of; the shoe on members II-8, one of which is shown in Fig. 1, these members being slidingly movable lengthwise of the shoe on the top of the frame. The tacker support H6 is thus movable bodily lengthwise of the shoe in addition to being mounted to swing heightwise ofthe shoe. Both thebodily movement and the swinging movement are imparted to the tacker support by a pair of crank arms I20 fast on a shaft I22 mounted to turn in bearings on a top frame plate I23; the crank arms being pivotally connected to thelower ends of members I24- which extend upwardly-into openings in the support and on which the front end portion of the support rests. Fast on the shaft I22 is a pinion I26 engaged by another pinion I28 which is engaged by the teeth ofa gear sector I30 fast on the upper end of a lever I32. This lever is mounted to swing about a rod I34 on the frame and has on its lower end a roll I 36 engaged by a groove cam I38 on the cam shaft 24. By this cam the lever is swung in a counterclockwise direction with reference to Fig. 1 at the time in the cycle of operations of the machine when the wipers wipe the upper inwardly over the insole to move the tackers into positions to begin the tack-driving operations.

As thus far described the machine herein shown is of the same construction as disclosed in the earlier application, and this construction has been found to operate satisfactorily under most conditions. In view, however, of the character of the means provided for imparting the wiperadvancing movement to the wiper carrier 6, comprising the lever I6 and the two bell-crank levers 28 and 40 arranged in series; it may happen that in operating on very heavy upper materials the resistance of the upper to the advancing movement of the wipers in wiping its marginal portion inwardly over the insole will cause the mechanism for operating the wiper carrier to spring slightly and thereby prevent the wipers from arriving at the normal limit of their movement lengthwise of the last. This may prevent the upper from being wiped as far inwardly as desired and may also undesirably affect the alinement of the tackers II4 with the openings H2 in the wipers. To insure against such undesirable results the construction herein shown includes two bell-crank levers I40 fast on a rockshaft I42 mounted to turn in a bracket I44 secured to the top frame plate I23 underneath the plate. A downwardly extending arm I46 of each of these levers is connected by a link I48 to the rod 52 which, as hereinbefore explained, connects the arm 50 of the bell-crank lever 48 to the wiper carrier 6. Mounted on a forwardly extending arm I50 of each bell-crank lever I40 is a roll I52 arranged to be engaged by a cam I54 fast on the shaft I22. When the wiper carrier is moved forwardly lengthwise of the last by the lever I6 and the parts connecting it to the rod 52 on the carrier, this rod acts through the links I48 to swing the bell-crank levers I40 idly in clockwise directions with reference to Fig. 2 and thereby to swing upwardly the forwardly extending arms I50 of these levers. When the Wiper carrier is at the normal limit of its forward movement the arms I50 are in engagement with stop faces I56 on the front ends of plates I58 secured on the top frame plate I23, as illustrated in Fig. 5. If

conditions are such that because of the resistance ofthe uppermaterials the movement of the wiper carrier to its normal; limit isnot quite completed by. the action of the lever I6, the cams I 54, after moving into engagement with the rolls I52, act on the arms- I50 near the end of the tacker-positioning movement of the shaft I22 to complete positively the movement of the carrier. Insurtime is thus afforded that regardless of the. resistance of the upper the wipers will be movedlengthwise of the last to the required positions.

Having described the invention, what claim as new. and desire to secure by LettersPatent-of the United States is:

1. In a lasting machine, wipers for, wiping the marginalportion of an upper around anend of; a last inwardly over an insole on the last,

power-operated means for normally advancing said wipers lengthwise of; the last to a predetermined limit of; movement in the wiping operaie member ep a o said rs an arranged to be moved idly by said power op eratedf means, and additional positively acting new r-oper e e ns n s a m mb r mavab e. nto, em nt w Said fi st-named member for insuring the completion of themovement of the wipers to said predetermined limit regardless of resistance of the upper materials to the action of said first-named means.

2. In a lasting machine, wipers for wiping the marginal portion of an upper around an end of a last inwardly over an insole on the last, a wiper carrier mounted for movement to carry said wipers lengthwise of the last, power-operated means for normally advancing said wiper carrier lengthwise of the last to a predetermined limit of movement in the wiping operation, a member arranged to be swung idly by said poweroperated means, and additional power-operated means constructed and arranged to act positively on the wiper carrier through said member independently of said first-named means to insure the completion of the movement of the carrier to said predetermined limit regardless of resistance of the upper materials to the action of said first-named means.

3. In a lasting machine, wipers for wiping the marginal portion of an upper around an end of a last inwardly over an insole on the last, a wiper carrier mounted for movement to carry said wipers lengthwise of the last, a power-operated lever for normally advancing said wiper carrier lengthwise of the last to a predetermined limit of movement in the wiping operation, a member movable idly by said lever, and additional power-operated means including a cam movable into engagement with said member to insure the completion of the movement of the carrier to said predetermined limit regardless of resistance of the upper materials to the action of said lever.

4. In a lasting machine, wipers for wiping the marginal portion of an upper around an end of a last inwardly over an insole on the last, a wiper carrier mounted for movement to carry said wipers lengthwise of the last, a lever, a cam for operating said lever to advance the wiper carrier normally lengthwise of the last to a predetermined limit of movement in the wiping operation, another lever movable idly by said first-named lever, and additional positively acting cam means for operating said other lever to insure completion of the movement of the wiper carrier to said predetermined limit re gardless of resistance of the upper materials to the action of said first-named lever.

5. In a lasting machine, wipers for wiping the marginal portion of an upper around an end of a last inwardly over an insole on the last,'a wiper carrier mounted for movement to carry said wipers lengthwise of the last, a lever connected to said wiper carrier, means for operating said lever to advance the wiper carrier normally lengthwise of the last to a predetermined limit of movement in the wiping operation, a pair of bell-crank levers also connected to the wiper carrier, and cams for operating said bell-crank levers to insure the completion of the movement of the Wiper carrier to said predetermined limit the action of said first-named lever.

6. In a lasting machine, wipers for wiping the marginal portion of an upper around an end of a last inwardly over an insole on the last, a Wiper carrier mounted for movement to carry said wipers lengthwise of the last, a power-operated lever for advancing the wiper carrier normally lengthwise of the last to a predetermined limit regardless of resistance of the upper materials to complete the movement of the carrier if its movement to said predetermined limit is not completed by said first-named lever. V

7. In a lasting machine, wipers for wiping the marginal portion of an upper around an end of a last inwardly over an insole on the last,- a wiper carrier mounted for movement to carry said wipers lengthwise of the last, a power-operated lever for advancing the wiper carrier normally lengthwise of the last to a predetermined limit of movement in the wiping operation, other leversconnected to the Wiper carrier to be swung by the movement of the carrier, and poweroperated cams arranged to act on said other levers after such swinging movements thereof to complete the movement of the carrierif its movement-to said predetermined limit is not completed by said first-named lever.

- LESTER S. MACDONALD.

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

UNITED STATES PATENTS Number Name Date 1,130,142 Cavanagh Mar. 2, 1915 1,980,435 Pym et a1 Nov. 13, 1934

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