US2692998A - Machine for effecting relative movement between shoes and lasts - Google Patents

Description

Nov. 2, 1954 A. s. DOROSZ ETAL MACHINE FOR EFFECTING RELATIVE MOVEMENT BETWEEN SHOES AND LASTS 2 Sheets-5heet l Adolph SDomsz Willa/"d L Bake/ Nov. 2, 1954 A. s. DOROSZ ETAL 2,692,998

MACHINE FOR EFFECTING RELATIVE MOVEMENT BETWEEN SHOES AND LASTS Filed Dec. 5, 1951 2 Sheets-*Sheet 2 Inventors Adolph S Dorosz a' minimum of 'efifort United States Patent C) M MACHINE FOR EFFECTING RELATIVE MOVE- MENT BETWEEN SHOES AND LASTS Adolph S. Dorosz, Beverly, and Willard L. Baker, Ipswich, Mass., assignors to United Shoe Machinery Corporation, Flemington, N. J., a corporation of New Jersey Application December 5, 1951, Serial No. 259,996 11 Claims. (CI. 12-15) This invention relates to machines for effecting relative movement between shoes and lasts, and is herein disclosed as embodied in a force lasting machine of the type illustrated and described in United States Letters Patent Nos. 2,427,356 and 2,427,357, both granted Septemper 16, 1947, upon applications of Norwood H; Knowlton, wherein the force operable upon the shoe is derived from a driven friction roll. In the machines disclosed in said Knowlton patents the shoe is pressed, not directly against the friction roll, but against an intermediate member in the form of a friction belt interposed between the shoe and the roll. In the machine herein illustrated, an intermediate member is provided in the form of a fiat friction pad somewhat like the pad of a last pulling machine disclosed in United States Letters Patent No. 2,435,656, granted February 10, 1948, upon the application of Fred Ricks and Reginald B. Woodcock. It will be observed that in the machines disclosed in said prior patents, the entire force exerted upon the shoe is applied to a single locality of the shoe; for example, in the Knowlton machines it is applied only to the shoe bottom. In the machine herein illustrated such force is applied not only to the shoe bottom but also to the shoe upper.

It is an object of the present invention to provide a force lasting machine capable of performing its operation without unduly straining the shoe or fatiguing the operator. In accordance with this object a feature of the invention resides in the provision, in addition, to the friction pad which operates against the shoe bottom, of a rotatable friction member operable upon the upper of the shoe. These two friction members cooperate to urge the shoe upon the last by the application of'forces to those localities at which the forces will be most effective to move the shoe without unduly straining it. As illustrated herein the rotatable friction member operable upon the shoe upper is so connected to the friction pad which operates against the shoe bottom as to be driven thereby. The shoe bottom engageable friction pad derives its motion from the driven" friction roll, already mentioned, the contacting surfaces of the pad andthe roll having interengaging wedge-shaped grooves and ridges which cooperate to insure adequate traction with on the part of theoperator to hold them in driving engagement. In accordance. with a further feature, means are provided for guiding the shoe bottom engageable pad away from the driven roll as the pad completes its operative movement, to avoid needless wear upon the roll and possible jamming of the pad against the roll.

These and other features of the invention, including certain details of construction and combinations of parts, will be set forth in connection with an illustrative machine and will be pointed out in the appended claims.

Referring now to the accompanying drawings,

Fig. 1 is a side elevation showing the positions of the various parts of an illustrative machine after the treadle has been depressed far enough to bring the friction members into position to begin their operation;

Fig. 2 is a front elevation of a portion of the machine looking in the direction of the arrow II in Fig. 1;

Fig. 3 is a sectional view taken on the line II'I-III of Fig. 1; and

Fig. 4 is a side elevation of a portion of the machine at the completion of the operation.

The work engaging instrumentalities of. the illustrated machine comprise a friction pad operable vupon 2,692,998 Patented Nov. 2, 195,4

the bottom of the forepart'of a shoe S loosely mounted upon a last L, and a rotatable rubber1friction member or pad 1-2 operable upon the upper of the shoe, andalso a last pin 14'upon which the last is mounted. A stationary last pin 15' is provided for the convenience of the op erator'to facilitate the initial placing of the shoe on the lastby hand. The friction-pad 10 and the rotatable friction' member 12 are driven, by means presently to be described, in a direction to urge the shoe S further on the last L.

The last pin 14, as shown in Fig. I, fits loosely within the thimble hole of the last and is curved to permit the last depending from it to be rocked toward the pad). When-the last is thus supported, the forepart of the upper of the shoe on it rests against the rotatable friction member 12. The last pin 14 is secured in a block 16 which is rigidly fixed by screws 18 to a slide 20, this slide being guided for heightwise movement in a sleeve 22 having a slot 24 through which the block 16 extends. The slide 20'can be adjusted heightwise in the sleeve 22 and also maintained in its adjustedposition by a knurled wheel 26 which operates through a rack and pinion mechanism similar to that shown in Fig. 3 of United States Letters Patent No. 1,820,952, granted September 1', l931,uponthe application of John M. Whelton and Arthur F. Pym. The sleeve 22 constitutes a portion of an integral bracket having a pair of depending spaced parallel sector-shaped plates 28- (Fig. 2) and 30. mounted for pivotal adjust ment upon coaxial shoulder studs 32 secured in a bracket 34 comprising a pair of spaced parallel plates 36 and 38. The plate. 28 slidably engages the outer face pf the plate 3.6 andthe plate 30 slidably engages the outer face of the plate 38. Formed in each. of the plates 28 and 30 is an arcuate'slot 40' coaxial with the studs 32 and, extending through the slots 40 and through holes in the plates 36 and 38, is abinding pin 42; Securely fixed upon the right hand end of this binding pin- 42 is an elongated head 44 from which extends a pin 46 engaging the right-hand slot 40 to prevent turning of the pin 42. The left-hand end of the pin 42 threadedly engages a hub' 48. of a" hand' wheel 50 which can be turned toloosen the binding pin 42when an angular adjustment of the sleeve-22 isto be made and which can then be tightened; to maintain the adjustment. A spacing sleeve 52 surrounding the pin 42 bridges the space between the plates 36 and 38 toprevent them from yielding toward each other when clamping pressure is applied'by the wheel 50'. The upper portions of the plates 36 and-38' are" connected by a bridge 53, and the lower end portions are connected by a bridge 54. to which is secured a, depending stem 56 slidable heightwise in a guideway formed in a lever58; The stem 56 can be clamped in a-desired position of heightwise' adjustment in the lever 58 by a pair of clamping screws 60 which tighten. an upper split-portionof the guideway. Undesiredturning ofthe bracket 34 is prevented'by apin 59 secured in the lever 58 and having a squared-01f end which en-. gages a groove 61 in the stem 56. The lever 58 has a forked lower end portion by which it is fulcrumed upon apair of trunnion; pins 62 (only one is shown) extending diametrically from a' sleeve 64 mounted for forward and rearward adjustment upon a pin 66. The sleeve 64 is held in adjusted position on the pin 66 by a clamping bolt 68 similar to the part 64.of the machines disclosed in the patentto Whelton and Pym above men.-

tioned. The pin 66 is rigidly secured in a portionof a housing 70'whichconstitutes theframe ofthe machine.

Thelever 58 can be swung about the trunnions 62. by mechanism comprising atreadle 72- connected" by a rod 74-t'o a lever 76. Thislever 76 is fulcrumed upon a pin 78 mounted on a lug extending from the housing 70, and when thetreadle 72 is depressedthe lever 76 exerts a downward thrust through a rod 80 to a pin 82extend ing rearwardly from an arm 84 on the lever'58: Thetreadle 72 is normally held in an upward position by a spring 8.6 against a portion. of the as an'upper stop for the treadle. A pin. 88 extending rearwardly from the lever 58- engages a, vertical slot 90 formed in a plate secured to the the lever. 58 for swinging. movement about the trunnions 62 and .to hold the lever against lateral movement. Thepad 10. (F i'g, 3.) comprises. a metal backing .plate housing 7 0 which serves housing 70,- to, guide.

92 covered with a cushion of rubber 94 and secured to a metal plate 96 which bridges and is carried by a pair of parallel bars 98 and 100. The lower end of the bar 98 is pivotally connected by a pin 102 to a lever 104 fulcrumed upon one of the trunnions 62. The lower end of the bar 100 is pivotally connected by a pin (not shown) coaxial with the pin 102 to an arm 106 pivotally mounted upon the other trunnion 62. The bars 98 and 100 are supported in an initial position by a pair of coaxial pins 108 extending laterally from the bars and engaging diagonal slots 110 formed in a pair of parallel cam members 112 (only one of which is shown). For convenience of construction, the pins 108 are actually the end portions of a single rod extending through both the bars 98 and 100. The cam members 112 are both pivotally mounted upon a transverse pin 114 secured on the housing 70. When the bars 98 and 100 are in their initial positions the pins 108 rest in the bottoms of the slots 110 and each cam 112 is held against counterclockwise rotation by a stop screw 116 the head of which bears against the front wall of the housing 70. A pair of tension springs 120 (only one is shown) having their lower ends hooked to the trunnions 62 and their upper ends hooked to the bars 98 and 100 respectively serve to hold the bars down in their initial positions. Each cam 112 carries also a second stop screw 118 for a purpose later to be explained, these screws being engageable with surfaces 119 on the housing 70.

The metal plate 96 of the pad has formed on it a plurality of ridges 122 and corresponding grooves, the common walls of which are inclined. These ridges and grooves can enter into wedging engagement with cooperating grooves and ridges 124 formed in a rubber roll 126 mounted upon a core 128 which is secured upon a driven shaft 130, the direction of rotation of the roll being indicated by an arrow on Fig. 1. The shaft 130 is mounted in suitable bearings secured in the housing 70.

The rotatable rubber shoe upper engaging pad 12 is sector-shaped and is mounted upon a suitable core secured to a transverse shaft 132 journaled in the upper portion of the bracket 34. Secured on the shaft 132 is a crank arm 134 to the outer end of which is pivotally connected the upper end of a rod 136 having its lower end pivotally conected by a pin 138 to a forwardly extending portion of the lever 104. The rod 136 consists of an upper section and a lower section, each of the sections being adjustably clamped in a block 140 to enable the effective length of the rod to be adjusted. It is evident that when the bars 98 and 100 are raised the rod .136 will swing the crank arm 134 down and rotate the shoe upper engageable pad 12 in a counterclockwise direction as indicated by an arrow on Fig. 1. The lever 104 has formed in it a plurality of holes 142 at various distances from the trunnions 62, and the pivot pin 138 can be engaged with any selected hole to insure a desired speed and range of movement of the upper engaging pad 12.

The effective length of the rod 74 is adjusted by an arrangement (not shown) similar to that already deslcgrbed for adjusting the effective length of the rod The operation of the machine will now be explained. First the shoe S is loosely mounted by hand on the last L, which may be either of the non-collapsible or the hinged type, and the last is hung on the last pin 14 toe end down. When the machine is in its initial position the pins 108 will be at the bottom of the inclined slots 110, with the plate 96 thus cammed out of contact with the driven roll 126. The toe end of the shoe will now extend down between the rotatable rubber pad 12 and the pad 10, with the upper of the shoe lightly resting against the leading edge of the sector-shaped pad 12 and with the bottom of the forepart of the shoe spaced with convenient clearance from the pad 10.

The following adjustments, if desirable, can be made at this time. The knurled wheel 26 can be turned to raise or lower'the last pin 14 in accordance with the ,length of the last and thereby bring a desired locality of the forepart of the upper of the shoe into the most suitable heightwise position for engagement with the leading edge of the sector-shaped rotatable pad 12. The plates 28 and 30 can be angularly adjusted about the axis of the studs 32 to accommodate the shape of the last; for

lasts intended for high heeled shoes the sleeve 22 should 'occupy a more forward or outward position than for 4 lasts intended for low heeled shoes; and in either case the adjustment should be suchas to bring the shoe bottom substantially flat against the rubber cushion 94 when the treadle is depressed. The pivot pin 138 should be positioned in whichever hole 142 has been found most desirable for the particular nature of the work. Once these adjustments have been made for any one size and type of shoe, they can usually be left unchanged until shoes of a different size or type are to be operated upon. The adjustment of the effective length of the rod 136 accurately positions the point of application of the leading edge of the sector-shaped pad 12 upon the shoe and advances or retards the leading edge in relation to the movement of the pad 10; it is useful in taking up wear of the leading edge of the pad 12. The heightwise adjustment of the stem 56 and the forward and rearward adjustment of the sleeve 64 are setting up adjustments and are seldom changed. The initial or forward position of the lever 58 about the trunnions 62 can be changed by varying the effective length of the rod 74.

After the machine has thus been adjusted and a last has been mounted on the last pin 14, the treadle 72 will be depressed to swing the lever 58 inwardly, causing the pad 12 to press the bottom of the shoe against the cushion 94 and to push against the latter until the grooved metal plate 96 moves into driving engagement with the driven roll 126. Fig. 1 shows the parts of the machine at this stage of the operation. As soon as driving engagement has been efiected between the driven roll 126 and the metal plate 96, the pad 10 will rise and exert upon the shoe bottom a frictional force to urge the shoe further on the last. As the pad 10 and with it the bars 98 and rise, the lever 104 will swing in a counterclockwise direction and exert through the rod 136 a downward pull upon the lever 134 which rotates the pad 12 in a counterclockwise direction (indicated by an arrow on Fig. 1), thereby assisting the pad 10 in urging the shoe upon the last. The last pin 14 holds the last against the upward thrust exerted upon it by the shoe. Since the forces exerted by the pad 10 and the pad 12 are applied to oppositely disposed portions of the shoe, any tendency of the shoe to bind against the last, and any danger of straining the shoe, which might result from the application of force against any one localized area are avoided. While the shoe is thus being forced upwardly upon the last, the operator can swing the last by hand a little to one side or the other about the axis of the last pin 14 in accordance with the swing of the last to insure an even application of frictional force on the right and left hand sides of the median line of the shoe bottom. The interengaging grooves and ridges of the plate 96 and the driven roll 126 insure the development of adequate traction between the plate and the roll without requiring excessive pressure on the treadle. As soon as the pad 10 begins its upward movement the pins 108 exert an upward thrust against the upper edges of the slots and begin to swing the cams 112 into an upper position determined by the engagement of the stop screws 118 against the surfaces 119. When the cams are moved into this position the inclination of the slots 110 becomes reversed, as shown in Fig. 4, and the upper edges of the slots will react against the pins 108 to cam the bars 98 and 100 outwardly until the driving friction between the plate 96 and the driven roll 126 has been relieved. Even if the operator should inadvertently continue holding the treadle down after the shoe has been forced as far as desirable upon the last, the driving friction between the grooved plate 96 and the rubber roll 126 will cease and needless wear of the rubber roll will be avoided. Such stopping of the upward movement of the pad 10 is desirable for the further reason that, if it were allowed to continue indefinitely, the arcuate movement of the pins 102, when 'well above the horizontal center line of the trunnions 62, might jam the grooved plate 96 against the rubber roll 126. The design of the cams 112 and the adjustment of the stop screws 118, and also the adjustment of the sleeve 64 on the pin 66, are such as to insure an upward travel of the pad 10 of about twice the distance traveled been found desirable for some types of shoes. The operator Udll, UL OUUI'DU, l'ulfittor; LAM; LICctuIG 21:. any [1111i 11$ desires to terminate LZLC ULJJIZILLUU, or L llldtsd a iresn start.

naving thus described our invention, what we claim as new and desire to secure by Letters ratent or the united States is:

1. in a machine for effecting relative movement between lasts and shoes, a support tor a last wun a shoe thereon, a pair or IIlCLlOIl members one or which is rotatable, means for causing the snoe and last to be pressed between said friction members, and means for rotating the rotatable member and ror moving the other fricuon member to cause the shoe to be moved relatively to the last.

2. In a machine for effecting relative movement between lasts and shoes, a support for a last with a shoe thereon, a friction pad engageable with the shoe bottom, a rotatable friction member engageable with the shoe upper, means for causing pressure to be exerted between the shoe bottom and the friction pad and also between the shoe upper and the rotatable member, means for moving the friction pad longitudinally of the shoe to move the shoe relatively to the last, and means for rotating the rotatable member to assist the friction pad in moving the shoe.

3. In a machine for effecting relative movement between lasts and shoes, a support for a last with a shoe thereon, a driven roll, a normally stationary friction pad interposed between the shoe bottom and the driven roll, means for causing the shoe bottom to press against the friction pad and to press the friction pad against the driven roll whereby the friction pad is moved by the roll in a direction to move the shoe relatively to the last, a rotatable friction member engageable with the shoe upper, and drive transmitting connections between the friction pad and the rotatable friction member for rotating the latter in a direction to assist in the moving of the shoe.

4. In a force lasting machine, a support for a last having a shoe loosely mounted thereon, a friction pad engageable with the forepart of the shoe bottom, a rotatable sector-shaped friction pad having its leading edge engageable with the forepart of the shoe upper, means for causing the shoe and last to be pressed be tween said friction pads, means for moving the bottom engageable pad in a direction to urge the shoe further on the last, and means for rotating the sectorshaped pad in a direction to cause its leading edge to exert a frictional force upon the shoe upper in a direction to assist the bottom engageable pad in urging the shoe further on the last.

5. In a force lasting machine, a last pin for supporting a last with a shoe loosely mounted thereon, a friction pad engageable with the forepart of the shoe upper, a common support for said last pin and said pad, a friction pad engageable with the shoe bottom, means for moving the common support to cause the upper engageable pad to press against the shoe and thereby press the shoe bottom against the bottom engageable pad, and means for moving both pads to cause them to urge the shoe further on the last.

6. In a force lasting machine, a support for a last with a shoe loosely mounted thereon, a driven roll a normally stationary friction pad, means for supporting the friction pad in a position between the shoe bottom and the roll and out of contact with the roll, means for causing the shoe bottom to press the friction pad 1n to frictional engagement with the roll whereby the friction pad is operatively moved by the roll in a direction to urge the shoe further on the last, a rotatable fr ction member engageable with the shoe upp er, and dIlV- ing connections through which the pad 1n its operative movement rotates the rotatable friction member in a direction to assist in urging the shoe further upon the last.

7. In a machine for effecting relative movement between lasts and shoes, a normally stationary friction member adapted to be engaged by a shoe on a last, a driven member, means for supporting the friction member for movement from a normal position wherein the friction member is out of contact with the driven member into an operating position of frictional engagement WILfl the unveil uieniuer', means 101" pressing the shoe 0L1 LDC ldSL 'agdlllb'l. L115 Ll'lULlUll .LUSJUUCJI,- LU Cotctllllbll 11.10" [101141 cugctgcnicnt tucrcwitu and also 1.0 press L 1110-- IlOn meuiuci' 1u|.0 saiu Operating pusltton wnciem L116 fnutlon member is Inuveu by the uriven member and 18 thereby caused to move the snoe relatively LO the last, and means ror causing the Inc-non member to move away rrom the driven member as me friction member completes its operanve movement.

8. in a Iorce lasting machine, a normally stationary friction pad adapted to be engaged rricuonany by a shoe loosely mounted on a last, a driven Il'lCIlOIl roll, means for supporting the pad for movement rrom a normal position of nonengagement with the roll into an operating position of frictional engagement with the roll, means for pressing the shoe on the last against the pad to establish frictional engagement therewith and also to press the pad into said operating position wherein the pad is moved by the roll and is thereby caused to urge the shoe further on the last, and a cam for guiding the pad away from the roll as the pad completes its operative movement.

9. In a force lasting machine, a normally stationary friction pad adapted to be engaged frictionally by the bottom of a shoe loosely mounted on a last, a driven friction roll, a support whereby the last is mounted for movement toward the roll, a support whereby the pad is mounted for movement from a normal position of nonengagement with the roll into an operating position of frictional engagement with the roll and for a further operative movement longitudinally of the shoe, means for moving the last support to cause the shoe bottom to press frictionally against the pad and also to press the pad against the roll, whereupon the pad is operatively moved by the roll longitudinally of the shoe to urge the shoe further on the last, and a cam for guiding the pad away from the roll as the pad completes its operative movement.

10. In a force lasting machine, a normally stationary friction pad, a driven friction roll, said pad being engageable with the bottom of a shoe loosely mounted on a last and being movable under pressure of the shoe to engage the friction roll and to be operatively driven thereby to urge the shoe further on the last, and means comprising a reversible cam for normally holding the pad yieldingly out of driving engagement with the roll and for camming the pad out of driving engagement with the roll as the pad completes its operative movement.

11. In a force lasting machine, a normally stationary friction pad adapted to be engaged frictionally by the bottom of a shoe loosely mounted on a last, a driven friction roll, a support for said pad comprising a cam having a closed slot, a pin rigid with the friction pad and normally resting in the lower end of the slot to support the friction pad, said slot being inclined to hold the friction pad away from the driven roll when the pad is in its normal down position, a pivotal mounting about which the cam can swing up during an upward operative movement of the friction pad which results from a shoe bottom pressing the friction pad against the driven roll, said inclined cam slot having its inclination reversed by the upward swinging movement of the cam, the cam slot with its inclination thus reversed acting upon the pin to cam the friction pad out of driving engagement with the driven roll as the friction pad completes its operative movement, and stops for limiting the swinging movement of the cam in both directions.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,188,972 Bazzoni Feb. 6, 1940 2,427,357 Knowlton Sept. 16, 1947 2,435,656 Ricks et a1 Feb. 10, 1948 2,472,513 Bergquist June 7, 1949 FOREIGN PATENTS Number Country Date 370,381 Italy Apr. 14, 1939

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