US2774086A - Heel rest mechanisms - Google Patents

Description

Dec. 18, 1956 P. E.- BURBY HEEL REST MECHANISMS 5 Sheets-Sheet 1 Filed July 13. 1953 Inventor Dec. 18, 1956 P. E. BURBY HEEL REST MECHANISMS 5 sheets-sheet 2 Filed Ju1y l5, 1953 II ll I IIII 1 In v e n tor P/ZZZQUEBU/y QQN P. E. BURBY HEEL REST MECHANISMS Dec. 18,1956

Filed July 13, 1953 5 Sheets-Sheet 3 5 Sheets-Sheet 4 July 15. 1953 Filed t n 6 M Dec. 18, 1956 P. E. BURBY HEEL REST MECHANISMS 5 Sheets-Sheet 5 Filed July 13, 1953 In ven to r Pin/1p Bunby 55/ his/Tit I EEEL REST MECHANISMS Philip E. Barby, Beverly, Mass, assignor to United Shoe Machinery Corporation, Fiemingten, N. 1 a corporation of New Jersey Application July 13, 1953, Serial No. 357,381

6 Claims. (Cl. 12-124) This invention relates to a novel and improved heel rest mechanism for use in lasting machines, and is herein illustrated as embodied in a lasting machine of the type disclosed in United States Letters Patent No. 2,160,846, issued on June 6, 1939, in the names of Fred C. Eastman and Arthur F. Pym. It will be understood, however, that the heel rest mechanism of this invention is not limited to use in a machine of this particular type or to the exact mechanical construction herein illustrated.

In lasting machines of the type disclosed in the aforementioned patent the toe end of the shoe being lasted is clamped against a toe plate by means of a vertically movable toe rest, the toe plate also serving to position the toe end of the shoe relatively to end embracing wipers which are provided in the machine for working the upper materials into lasted position at the toe end of the shoe. In addition, the machine of the aforementioned patent has a heel rest, or heel band, which is moved into engagement with the heel end of the shoe in order to hold it firmly against rearward movement by forces exerted on its toe end during the operation of the wipers.

A principal object of this invention is to provide a novel and improved heel rest construction for use in machines of the type here under consideration which is not only effective to hold the shoe being lasted firmly against rearward movement but at the same time is adapted to provide for relatively free movement of the heel end of the shoe in a plane extending transversely of the shoe thereby to permit the toe end of the shoe readily to adjust itself to the action of the toe-embracing wipers. With these purposes in View, the herein illustrated heel rest comprises a shoe-engaging member which is movable into engagement with the heel end of the shoe and thereafter is held against movement in a direction lengthwise of the shoe, away from the wipers, and which is mounted for universal floating movement in a plane extending transversely of the shoe. More particularly, the heel rest includes a plate-like shoe-engaging member, a support which is movable to cause the plate-like member to engage the heel end of the shoe and thereafter is held against moveent in a direction lengthwise of the shoe away from the wipers and which is provided with a substantially flat surface lying in a plane extending transversely of the shoe, and a plurality of anti-friction means interposed between the plate-like member and the fiat surface on the support. Preferably, the shoe-engaging member is faced with a resilient heel-engaging portion to avoid marking or otherwise damaging the upper at the heel end of the shoe. As herein illustrated, the heel rest support is mounted for movement on a guide member which is offset laterally on one side of a shoe in the machine so that, when the heel rest is withdrawn from engagement with the heel end of the shoe and the shoe is released, as a result of movement of the toe rest away from the toe plate, the shoe is unobstructed to fall into a suitable receptacle provided for this purpose. Preferably, the means for movably mounting the heel rest support includes a carriage provided with anti-friction rollers which ride on guide surfaces on the aforementioned guide member and this carriage is operated by mechanism associated with the lasting machine and which, as herein illustrated, is similar to that disclosed in the above-mentioned patent.

The above and other objects and features of the invention will appear in the following detailed description of the embodiments thereof illustrated in the accompanying drawings and will be pointed out in the claims.

In the drawings,

Fig. 1 is a plan view of a portion of a lasting machine provided with a heel rest embodying the features of this invention;

Fig. 2 is a view in side elevation of the machine shown in Fig. 1;

Fig. 3 is a view on an enlarged scale and in vertical section substantially on line III-III of Fig. 1 and looking in the direction of the arrows;

Fig. 4 is a view in vertical section substantially on line IV-lV of Fig. 3, and looking in the direction of the arrows;

Fig. 5 is a plan view of a modified heel rest construction; and

Fig. 6 is a view in side elevation with certain parts shown in vertical section substantially on line VI-VI of Fig. 5, and looking in the direction of the arrows.

Referring first to Figs. 1 and 2, the improved heel rest is shown as applied to a lasting machine of the type disclosed in the patent to Eastman et al., mentioned above, which is provided with end embracing wipers 20, 20, for working the upper materials of a shoe into lasted position at the toe end of the shoe and for wiping the lasting margin of the upper materials inwardly over the toe end and against the rib of the insole of the shoe. These wipers are associated with a wiper carrier 22, which is mounted'on a frame construction 24 for movements in directions extending lengthwise and heightwise of the shoe being lasted by means of mechanism contained within the frame and connected to the carrier, all as clearly disclosed in the aforementioned patent. During the operation of the machine, the toe end of the shoe being lasted is clamped against a toe plate 26 by means of a toe rest 28 which is mounted on the upper end of a vertically movable post 36 For holding the shoe against heelward movement in response to the forces applied to its toe end by the wipers 20, 20, the herein illustrated machine is provided with a heel rest of improved construction which in the drawings is indicated generally by the reference character 32.

The heel rest 32 comprises a facing member or strip 34 of rubber, or like material, which is secured to a metallic backing plate 36, Fig. 4. Fastened to this backing plate are four rearwardly extending ears 38, 38 which are in allnement with similar cars 40, 40 secured to a support 42, and extending between these sets of cars are coil springs 44, 44. interposed between the backing plate 36 and a flat front surface 46, formed on the support-42, are two antifrr- ction bearings 48, 48 each comprising a ring 50 contaming a series of balls 52, 52, Figs. 3 and 4. These two antifriction bearings are yieldingly held in the positions shown by means of a connecting link 54 and two coil springs 56, 56, which permit limited but universal movement of the bearings and hence of the heel rest 32 in a plane parallel to :the surface 46 and to the extent determined by the ears 38, 38 and similar cars 58, 58, Fig.1, formed on the backing plate 36.

The support 42 has a downwardly extending flange 60, Fig. 4, to which there is secured, by means of a nut 62, a rectangularly shaped stud 64. This stud is slidably fitted in an elongated slot 66 formed in the upwardly extending portion 68 of a carriage 70, Figs. 3 and 4. A reduced end portion 72 of this stud extends beyond the portion68 and is threaded to receive a clamp nut 74. Secured to one side of the upwardly extending portion 68 of the carriage 70 is a plate 76, provided with a slot 78 of similar size and shape as the slot 66, and having a series of V-notches 80 therein, Fig. 1. Interposed between the clamp nut 74 and the plate 76. is a thrust washer 82 which is provided on one of its surfaces with a diametrically extending V-shaped rib 84, Fig. l. A coil spring 86, Fig. 3, is arranged to urge the washer 82 away from the plate 76 when the nut 74 is loosened, thereby permitting adjustment of the support 42 relatively to the carriage 70. When the desired adjustment has been made, the nut 74 is again tightened to force the washer 82 into engagement with the plate 76 with its rib 84 received in one or the other notches 80 on the plate 76. As will be apparent, when the nut 62 is loosened, the heel rest support 42 can be adjusted angularly relatively to the rectan-gularly shaped stud 64.

Secured to the frame 24, in offset lateral relation to a shoe in the machine, by means of bolts 90, 90, is a guide member 92 which is channel shape in cross section, as seen in Fig. 3. This guide member has two integrally formed angularly disposed guide surfaces 94, 94, and a third guide surface 96 is provided by one side of a rectangularly shaped gib 98 which is received within an elongated groove 100 in the guide member. The gib 98 is backed up by means of a plurality of adjusting screws 102 each provided with a lock nut 104, Fig. 2. Journaled on the carriage 70 are four anti-friction rollers 106, 106, which are angularly disposed in a manner to ride on the guide surfaces 94,. 94 and two antifriction rollers 108, 108 adapted to ride on the guide surface 96, each of these antifricti'on rollers being closed within a protective housing 110. Thus, the carriage 70, heel rest support 42 and the heel rest 32 are mounted for movement toward and away from the operating instrumentalities of the lasting machine, i. e., the wipers 20, 20.

For imparting movement to the heel rest during the operation of the machine, mechanism generally similar to that disclosed in the above-mentioned Eastman patent is provided. Connected to the carriage 70 is a rod 120 which extends into the frame 24 and is slidable in a bearing bore 122 formed in the frame, Fig. 1 (this rod corresponding to the rod 128 which appears in the lower portion of Fig. 21 of the Eastman patent). Pinned to this rod, within the frame, is one side of a yoke member 124 the opposite side of which is slidable on a rod 126 which is fixed to the frame. At its inner end the rod 120 is connected, by means of a link 128,.-to an arm 130 (corresponding to the arm 702 of the Eastman patent). This arm is loosely mounted on a rockshaft 132 and is adapted to be swung in a direction to impart rearward movement to the rod 120 by means of a pin 134 and in the opposite direction, to move the rod forwardly, by means of a coil spring 136, Fig. l. The rockshaft is turned in a direction to effect rearward movement of the rod 120 by means of a coil spring 138 (corresponding to Eastmans spring 712) which is connected .to an arm 140 secured to one end of the shaft 132, Figs. 1 and 2.

For turning the shaft in a direction to move the rod 120 forwardly thus to return the heel rest to the idle position in which it is shown, the arm 140 is connected, by means of a link 142, to one arm of a bell crank lever 144 the other arm of which is provided with a slot 146 in which there is received a pin 148, Fig. 2. This pin is carried by one arm of a lever 150, pivotally mounted on the frame 24, which is operatively connected by means of a link 152 to mechanism, not shown, for controlling upper tensioning grippers, one of which appears in Fig. 2, and is identified by the reference character154. Shortly after the beginning of each operating cycle of the machine and prior to the operation of the wipers 20, 20, this link is moved upwardly by the lever 150, which corresponds to the lever 476 of Eastman and is acted on by a spring 156 under the control of a cam 158. When this occurs, the spring 138 is rendered effective, through arm 140, shaft 132, pin 134, arm 130, link 128, and rod 120 to move the heel rest 32 to the right, Fig. 1, and yieldin'gly into engagement with the heel end of a shoe S, previously placed in the machine and clamped between the toe plate 26 and the toe rest 28. Near the end of the operating cycle, the link 152 is moved downwardly and, as a result of such movement of this link, the pin 148 engages the end of the slot 146 and the bell crank lever 144 is rotated in a counterclockwise direction, Fig. 2, thus moving the heel rest forwardly and away from the shoe to its idle position, such movement of the heel rest being effected yieldingly through the action of the coil spring 136.

In order to hold the heel rest firmly against the shoe during the lasting operation and when the wipers 20,

are exerting forces on the toe end of the shoe tending to move it to the left, Fig. 2, an arrangement similar to that disclosed in the mentioned Eastman patent is provided. Thus, the machine has a pawl 160 (corresponding to the pawl 728 of Eastman) which is adapted to engage ratchet teeth 162 associated with the yoke 124. This pawl is pivotally mounted on a pawl carrier 164 which is rotatably supported on a shaft 166, Fig. 2. A coil spring 168 tends to swing the pawl toward engagement with the teeth 162 but swinging movement of the pawl to this extent is prevented by cooperating surfaceson' the pawl and the pawl carrier when the latter is in the position shown in Fig. 2. Connected to the pawl carrier is a link 170in one end of which there is a slot 172 through which a pin 174 projects. This pin is carried by one arm of a bell crank lever 176 which corresponds to the lever 186 of Eastman and is associated with mechanism for imparting heightwise movement to the wiper carrier 22. Thus, when the bell crank lever 176 is rotated in a clockwise direction, during elevation of the wiper carrier, this pin moves along in the slot and releases the pawl carrier to the action of a relatively heavy coil spring 180, which not only rotates the pawl carrier in a counterclockwise direction to a position in which the pawl 160 engages the ratchet teeth 162 but also causes this pawl to hold the heel carrier firmly against the movement to the left, Fig. 2. 'Near the end of the operating cycle of the machine, the lever 176 is rotated in a counterclockwise direction thus causing the pawl to release the heel rest which is returned to its idle position as a result of the subsequent downward movement of the link 152, as already explained.

In operating the machine, the operator presents the shoe S to the machine from the left, i. e., from the side opposite to the guide member 92 which is offsetof the shoe in a lengthwise and widthwise direction and to place the forepart center line in alinem'ent with a vertical plane passing through the intersection of the wipers 20, 20 and by engagement with the bottom of the insole to level the forepart of the shoe relatively to the Wipers. rises and clamps the toe end of the shoe against the plate 26 and shortly thereafter the heel rest 32 is moved rearwardly and into yielding engagement with the heel end of the shoe through the action of the spring 138. During the operation of the wipers, the heel rest is firmly held against movement forwardly, i. e., away from the shoe, by the action of the pawl 160 and the heavy spring 180 so that the shoe cannot be moved forwardly in response to pressure exerted on its toe end by the Wipers. However, due to the novel construction and mounting of the heel rest 32 'the heel end of the shoe is quite free to move in a plane parallel to the surface 46 on the support 42. Hence, the shoe can readily accommodate itself to the action of the wipers on its toe-end by slight angular rocking movements about a lengthwise axis or by slight swinging movements either about a vertical or a transverse axis, as permitted by movement of the heel rest 32 relatively to the support 42. Atthe conclusion When the machine is started, the toe rest 28- of the operating cycle of the machine, the toe rest is returned to the idle position shown in Fig. 2 and the heel rest is moved to its idle position thus releasing the shoe which, due to the ofiset location of the guide member 92, is unobstructed and free to fall out of the machine. In order to relieve the operator of the necessity of being ready to catch the shoe as it is thus released, a suitable receptacle, indicated generally by the reference character 190, is secured to the frame of the machine directly below the shoe, see Fig. l. Preferably, this repectacle is large enough to contain several shoes so that a number of shoes can be lasted in succession before the operator is required to take the lasted shoes out of the receptacle and return them to the rack.

The laterally offset guide member arrangement for supporting the heel rest may be utilized for supporting a chain type heel band of the kind disclosed, for example, in the aforementioned Eastman patent. Referring to Figs. 5 and 6 of the drawings, the chain type heel band 200 is connected at its opposite ends to pins 202, 202 which are mounted in the upper ends of two arms 204, 204. These arms are each formed of two relatively adjustable portions 205, 207 in the manner described in the Eastman patent, clamp nuts 206, 206 being provided for holding the arm portions in adjusted positions. At their lower ends, each of the arms is provided with a hub 208 and the hub of the arm 204 which appears on the right in Fig. 5 is rotatably and slidably mounted on an extension 210 of an operating rod 212, which corresponds to the rod 120 previously described. This extension passes through a bore 214 formed in an upstanding portion 216 of a carriage 218 which has a laterally extending yoke part 220. A headed screw 222, threaded into the carriage 218 cooperates with a flange on the hub 208 to hold the parts in the positions shown in Fig. 6. The hub portion 208 of the other arm 204- is rotatably mounted on a headed stud 224 which is secured to the yoke part 22% by means of a nut 225. Associated with each of the hubs 208 of the arms 204 is mechanism similar to that disclosed in United States Letters Patent No. 2,245,580, issued on June 17, 1941, in the name of F. C. Eastman, which tends to hold the heel hand in the extended position in which it is shown in Fig. 5, while permitting the arms 204, 204 to swing toward each other and laterally to accommodate itself to the position of the heel end of the shoe, when the heel band is initially moved into engagement with the shoe, and thereafter to lock the arms against swinging movement when substantial pressure is applied to the shoe through the heel band.

The carriage 218, which corresponds to the carriage 70, described above, is mounted for movement on an offset guide member 230, secured to the frame 24 by bolts 228, by means including six antifriction rollers 232, 232, which are closed in housings 234, 234. The extension 210 of the rod 212 is provided with a series of holes 240, 240 and threaded into the upstanding portion 216 of the carriage 218 is a screw 242 having a reduced end portion 244. When the reduced end of this screw is withdrawn from a hole 240, the carriage 220 together with the heel band 200 may be adjusted relatively to the extension 210 to accommodate shoes of diiferent sizes, in a manner which should be apparent.

Having described my invention, what I claim as new and desire to secure by Letters Patent of the United States 1. In a machine for lasting shoes having end-embracing wipers for working the upper materials of a shoe into lasted position at the toe end of the shoe, a toe plate and a toe rest for clamping the toe end of the shoe, and a heel rest movable into engagement with the heel end of the shoe to prevent displacement of the shoe in a lengthwise direction during the operation of said wipers, said heel rest comprising a substantially flat shoe-engaging member supported against movement in a direction lengthwise of the shoe away from said wipers and mounted for universal floating movement in a plane extending transversely of the shoe.

2. In a machine for lasting shoes having end-embracing Wipers for working the upper materials of a shoe into lasted position at the toe end of the shoe, a toe plate and a toe rest for clamping the toe end of the shoe, and a heel rest movable into engagement with the heel end of the shoe to prevent displacement of the shoe in a lengthwise direction during the operation of said wipers, said heel rest comprising a heel-engaging member, a support held against movement in a direction lengthwise of the shoe away from said wipers and provided with a substantially flat surface lying in a plane extending transversely of the shoe, and anti-friction means interposed between said heelengaging member and the flat surface on said support.

3. In a machine for lasting shoes having a frame structure, end-embracing wipers associated with the frame structure for working the upper materials of a shoe into lasted position at the toe end of the shoe, a toe plate and a toe rest for clamping the toe end of the shoe against said plate, a heel rest for engaging the heel end of the shoe, said heel rest comprising a heel-engaging member, a support held against movement in a direction lengthwise of the shoe away from said wipers and provided with a substantially flat surface lying in a plane extending transversely of the shoe, and antifriction means interposed between said heel-engaging member and the fiat surface on said support, a guide member rigidly secured to the frame structure in otfset lateral relation to a shoe in the machine, and means for movably mounting said support on the guide member.

4. In a machine for lasting shoes having a frame structure, end-embracing wipers associated with the frame structure for working the upper materials of a shoe into lasted position at the toe end of the shoe, a toe plate and a toe rest for clamping the toe end of the shoe against said plate, a heel rest for engaging the heel end of the shoe, said heel rest comprising a heel-engaging member, a support held against movement in a direction lengthwise of the shoe away from said wipers and provided with a substantially flat surface lying in a plane extending transversely of the shoe, and antifriction means interposed between said heel-engaging member and the fiat surface on said support, a guide member rigidly secured to the frame structure in offset lateral relation to a shoe in the machine, and antifriction means for movably mounting said support on the guide member.

5 In a machine for lasting shoes having a frame structure, end embracing wipers associated with said frame structure for working the upper materials of a shoe into lasted position at the toe end of the shoe, a toe plate and a toe rest for clamping the toe end of the shoe against the toe plate, and a heel rest for engaging the heel end of the shoe, means for supporting the heel rest for movement toward and away from the heel end of the shoe comprising a guide member rigidly secured to the frame structure in laterally offset relation to a shoe in the machine, a carriage on which the heel rest is mounted, guide surfaces on said guide member, and means associated with the carriage for movably supporting the carriage and the heel rest on the offset guide member.

6. In a machine for lasting shoes having a frame structure, end embracing wipers associated with said frame structure for working the upper materials of a shoe into lasted position at the toe end of the shoe, a toe plate and a toe rest for clamping the toe end of the shoe against the toe plate, and a heel rest for engaging the heel end of the shoe, means for supporting the heel rest for movement toward and away from the heel end of the shoe comprising a guide member rigidly secured to the frame structure in offset lateral relation to a shoe in the machine, a carriage on which the heel rest is mounted, guide surfaces on said guide member, and anti-friction rollers associated with the carriage for movably supporting the carriage and the heel rest on the offset guide member.

(References on following page) References Cited in the file of this patent UNITED STATES PATENTS Crisp et a1. Oct. 27, 1885 Copeland et a1 June28, 1887 'LaJChap'elle Ian. 11, 1916 Brock Apr. 5, 1921 m. g p5,... Maw

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