US2733588A - stagey etal - Google Patents

Description

Feb. 7, 1956 E. w. STACEY ETAL MACHINES FOR OPERATING ON SHOE BOTTOMS OR THE LIKE l5 Sheets-Sheet 1 Filed Dec. 11, 1952 484 I74 I. H

lnverzzzms' Ernest Sta cey Walter ENaug/er Feb. 7, 1956 E. w. STACEY ETAL 2,733,588

MACH..NES FOR OPERATING ON SHOE BOTTOMS OR THE LIKE Filed Dec. 11. 1952 Sheets-Sheet 2 kv f;

a 8 44 I l/L146 4 u I 6 #2 G) 58 i l I 10 m 66 T 752 7/6 7/8 as 52 as o m 68 g 78 754 I 328 44 #2 4s 730 m2 m 5 /2a m #4 #8 In uentom" Ernest W Stacey Wa/terEJ/Vaug/er By ney Feb. 7, 1956 E. w. STACEY ETAL MACHINES FOR OPERATING on SHOE BOT'IOMS OR THE LIKE 15 Sheets-Sheet 3 Filed Dec. 11, 1952 In ventom Ernest W. Stace WaHerEJVaug/er Feb. 7, 1956 E. w. STACEY ETAL 2,733,538

MACHINES FOR OPERATING ON SHOE BOTTOMS OR THE LIKE 15 Sheets-Sheet 5 Filed Dec. 11, 1952 Feb. 7, 1956 E. w. STACEY EI'AL 2,733,533

MACHINES FOR OPERATING 0N SHOE BOTTOMS OR THE LIKE Filed Dec. 11, 1952 15 Sheets-sheet 6 I Q 752 M4 -l a /m f f i i J 7293A i i-i W lnuentvfis j Ernest WStacey m Wa/terE' Naug/er Feb. 7, 1956 E. w. STACEY EI'AL 2,733,533

MACHINES FOR OPERATING ON SHOE BOTTOMS OR THE LIKE 15 Sheets-Sheet 7 Filed Dec. 11, 1952 won ttvr l ey Feb. 7, 1956 E. w. STACEY EI'AL MACHINES FOR OPERATING ON SHOE BOTTOMS OR THE LIKE Filed Dec. 11, 1952 15 Sheets-Shea;

In uenzons Ernest W. Stacey WalterENaug/er Feb. 7, 1956 E. w. STACEY ETAL 2,733,588

MACHINES FOR OPERATING ON SHOE BOTTOMS OR THE LIKE 15 Sheets-Sheet 9 Filed Dec. 11, 1952 In uen 202 5 Ernest W Stacey Wa It e r E. Naugler' mwmmmlr mmm Feb. 7, 1956 E. W. STACEY El AL MACHINES F /R OPERATING ON SHOE BOTTOMS OR THE LIKE Filed Dec. 11, 1952 15 Sheets-Sheet 10 [r1 UEi'ltOPS Ernest WSiacey Waite r E/Vaug/er Feb. 7, 1956 E. w. STACEY ErAL' 2,733,538

MACHINES FOR OPERATING ON SHOE BOTTOMS OR THE LIKE Filad Dec. 11, 1952 15 Sheets-Sheet 11 [HDGIItOPS Ernest'WStacey WalterE.Naug/er y eir 9y Feb. 7, 1956 E. w. STACEY ETAL MACHINES FOR OPERATING ON SHOE BOTTOMS OR THE LIKE Filed Dec. 11, 1952 15 Sheets-Sheet. 12

L l '1' L l M": 4/6 420 i E 4/9 I3 4ZQ v 330 L L,z 424 6 Feb. 7, 1956 E. w. STACEY ETAL 7 2,733,588

MACHINES FOR OPERATING Obi SHOE BOTTOMS OR THE LIKE Filed Dec. 11, 1952 5 Sheets-Sheet x3 In verz to P5 Ernest W. Stacey WaherE/Vaugler By t ey Feb. 7, 1956 E. w. STACEY ETAL MACHINES FOR OPERATING ON SHOE BOTTOMS OR THE LIKE l5 Sheets-Sheet 14 Filed Dec. 11, 1952 U; r wk mm m E r 3 "I T 4 EW Feb. 7, 1956 E. w. STACEY ETAL 2,733,583

MACHINES FOR OPERATING ON SHOE BOT'IOMS OR THE LIKE l5 Sheets-Sheet 15 Filed Dec. 11, 1952 ADVANCE lnuen tom I'rnest W. Stacey Wa/zer ENaug/er United States Patent MACHINES FOR OPERATING ON SHOE BOTTOMS' OR THE LIKE Emes. W. Stacey and Walter E. Naugler, Beverly, Mass,

assignors to United Shoe Machinery Corporation, Flemington, N. 1., a corporation of New Jersey Application December 11, 1952,' Serial No.- 325,284- 14 Claims. (Cl. 69-66) This invention relates to machines for operating on shoe bottoms or the like and is more particularly cor.- cerned with the provision. of-a machine for progressively treating the-overlasted marginal portion of an upper lying on a shoe bottom. By way of illustration, the invention is hereinafter described as embodied in a machine designed automatically to roughen progressively and according to pattern the overlasted margin of an' upper in preparation for the attachment thereto 'of an outsole'by-means of adhesive. It will be understood that, in certain aspects, the

invention is not limitedin use to a roughing operation,.

In preparing a shoe bottom for cement attachment-of a sole, especially where the upper is of leather, the usual practice is to roughen the marginal bottom surface of'the upper by manually presenting it to the action ofarotary. roughing tool such as a wire' brush. The shoe is so heldand manipulated-by hand that successive portionsofits bottom margin are fed into operative engagement with the tool, the path of roughing customarily extending along the margin from one corner of the heel breast area, around the forcpart, and ending atthe other corner of the heel breast area, thus omitting the heel end periphery. In view of the complex curvatures found in shoe bottom patterns and the need for a uniform degree of roughing along .the margins, the operation calls for the exercise of considerable skili. Moreover, the manual process becomesmore diflicult and time-consuming in-the case of high-quality shoes so constructed as to have marginal bottom portions which, in addition to the heel periphery, are not to be roughened. This situation arises, for example, where shoes are of open-toe-style, or have sandal-like straps-that are preattached to an upper and lasted together with the upper. These straps, when of. a material other than leather, might be badly-shredded or otherwise damaged upon contact with the roughing tool. In analogous machines for operating on predetermined peripheral -portions of other types of work with other instrumentalities than an abrading type tool (a coating wheel or an embossing tool, for instance), a similar need for automatic means for guiding and interrupting ,effectivetool contact will be recognized.

An object of this invention therefore is. to provide an improved machine, easily operated and requiring little or no skill, for uniformly and progressively'treating.with a tool the entire margin or selected peripheral portions of a work piece in accordance with a predetermined'pattern. Another object of the invention is to provide such a machine with power means for temporarily nullifying the dictates of the pattern and hence automatically preventing the operating tool from actingefiectivelypn voneor more predetermined portions of the work piece being treated.

A still further object is to control the positionof an oper- 2,733,588 Patented Feb. 7, 1956 piece by grading mechanism automatically actuated by a work support and having reference to a larger and a smaller model patterned after the work piece.

In pursuance of. these objects-and others and as a feature of the invention, the illustrative machine is'provided with a tool in the form of a roughing wheel, means for supporting a shoe, and improved power means for bodily moving the wheel and 'shoe' supporting means relatively to one another to carry the point of operation of the tool progressively about themargin of the shor bottom, regardless of-its shape or size, with substantially constant linear speed whereby an even roughing treatment may be obtained.

The requirediconfiguration of the Operating path of the roughing tool being determined by the particular styles of the shoes to be treated, the illustrated machine is accompanied'by. two sets of patterns for each style, one set comprising the graded letter widths for the smallest size (length of shoe), to be roughened and the other set comprising the correspondingly graded letter widths for the largest size to be roughened. A single pair of these patterns, one large and one small and of the same letter width, serve jointly to control the roughing operation upon shoes ofacomplete range of sizes of a single style and of that letter width. Thus an effective or true path of the tool is automatically determined and controlled for a complete size range of shoes of a given style and known width by a grading device automatically adjusted by a shoe support and coacting with the smallest and largest pattern of that style and corresponding .width, these two patterns being secured-togetheranddetachably mounted in the machine. Viewing this aspect of the invention more broadly, the-illustratedmachine' features grading means which is effective, when any workpiece intermediate in size between the large and small patterns-then mounted in the-machine, and'of l ke style,-is mounted in its support in the machine, to-prescrib'e and control a course of marginal operation of the tool on thework appropriately corresponding to the configuration of the patterns.

In anovel arrangement inz the illustrated machine, ashoe mounted'on itslast and with its bottom facing upward, is supported on a jack by a toe rest and a heel block and held between longitudinally separable toe and heel forks. When so jacked-the shoe itself appropriately adjusts the grading means to fix the operating path of the roughing tool. By use of a conventional type of onerevoiution clutch mechanism, the jack is given a single revolution during operation of the machine to carry the shoe and its pair of patterns in phase, and the jack is so mounted as to partake simultaneously of aswinging movement designed to traverse successive portions of the margin of the shoe bottom past the roughing tool with substantially constant linear speed, the tool itself having only such bodily oscillatory movement as is required to provide sufiicient width to the operating path. Means is provided in the cycle of the illustrated machine for bringing the tool from an out-of-the-way' position to its point of initial sh'oe' bottom contact in the heel breast area whereat the patterns commence their control influence and 'for subse'quently returning the tool to its original removed position at the end of an operating cycle. Also, the construction of the'illustrated machine as herein disclosed includes hydraulic means both for maintaining an even butadju'stable operating pressure between the roughing tool and the shoebottom and also for interrupting and restoring operative engagement'at selected intervals.

The above and other features of the invention, including various'novel combinations of parts and details of construction willnow be described in detail by reference to the accompanying .drawings of an illustrative machine for roughing shoe bottoms.

In the drawings,

Fig. 1 is a view in elevation of the right side .of a machine in which the invention is embodied and in which a shoe is mounted;

Fig. 2 is an enlarged view in elevation of the left side of the driving unit seen in Fig. 1;

Fig. 3 is a plan view of the driving means'shown in Fig. 2. portions being shown in section taken on the line III-III of Fig. 2;

Fig. 3A is a plan view on an enlarged scale of a portion of the clutch operating mechanism seen in Fig. 3;

Fig. 3B is a view in side elevation; partly in section, of parts shown in Fig. 3A;

Fig. 4 is a plan view of certain portions of the machine shown above the main frame seen in Fig. 1, but with patterns removed and indicating means-for controlling the roughing tool;

Fig. 4 is a plan view on an enlarged scale of mechanism shown in Fig. 4 for controlling the roughing tool on corresponding portions of shoe bottoms of different sizes;

Fig. 4 is an elevation of the parts shown in Fig. 4";

Fig. 4 is a detail of parts shown in Fig. 4";

Fig. 4 is a plan of a cam arranged angularly on its holder;

Figs. 4 and 4 are, respectively, arithmetic and geometric insole patterns superimposed and illustrating corresponding peripheral points thereon;

Fig. 5 is a view in right side elevation of means for mounting a shoe and its control patterns;

Fig. 6 is a plan view of mechanism shown in Fig. 5, parts being omitted to reveal construction details;

Fig. 7 is a plan view of the toe fork and toe rest seen in Fig. 1;-

Fig. 8 is a view in enlarged vertical section of the means shown in Fig. 1 for holding the heel end;

Fig. 9 is a section taken on the line IX-IX of Fig. 8;

Fig. 10 is a plan of the heel clamp shown in Fig. 8;

Fig. 11 is an exploded perspective view of a pair of patterns of one width; I

Fig. 12 is a view inside elevation of a portion of the machine above the main frame and showing grading mechanism in action on patterns which have been turned about their vertical axis about 90;

Fig. 13 is a view in left side elevation of a portion of the means for driving and locking heightwise, the roughing tool;

Fig. 14 is a view in rear elevation and on a larger scale of a portion of the machine shown in Fig. 4;

Fig. 15 is a view in rear elevation and partly in section taken on the line XV-XV of Fig. 4 showing mechanism,

connecting with thatshown in Fig. 12, for controlling elevation of the roughing tool;

Fig. 16 is a vertical section of a cylinder shown in Figure 15;

Fig. 17 is a detail in section of hydraulic control mechanism;

Fig. 18 is a plan view of followers operating on the heel end of a pattern;

Fig. 19 is a perspective view of the followers cooperating with the heel ends of patterns;

Fig. 20 is a plan view of the tool or brush elevating control arm and a shoe mounted in the machine;

Fig. 21 is an enlarged plan view, partly in section, of the brush head;

Fig. 21 is a section taken on the line XXV-XXI in Fig. 21;

Fig. 22 is an end elevation of an eccentric yoke bearing as seen when looking in the direction of the arrows XXII-XXII in Fig. 21;

Fig. 23 is a detail, partially in section, indicating a toggle operated locking linkage shown also in Fig. 4',

Fig. 24 is a schematic diagram of the hydraulic system controlling pressure application of the tool; and

Fig. 25 is a perspective view of a master model which .may be mounted in the machine as a part of an alternate.

1 in preparation for the reception of sole attaching cement.

the shoe S is mounted on a rotatable jack generally designated 32 (Fig. 5) and comprising a toe rest 34, a heel rest 36, a toe fork 38 and a heel fork 40. The jack 32 is so moved bodily with respect to the tool as to cause the point of operation of the tool automatically to traverse successive and continuous portions of the margin M, or when the tool is affected by controls hereinafter described, on only selected marginal portions of the shoe bottom. Accordingly the jack 32 (Fig. 5) is secured to an upright spindle 42 rotatable in a vertical bearing 44 formed integral with a plate-like link 46. The function of the latter is to impose on the jack an oscillating movement in a horizontal plane in addition to its rotation about a vertical axis which rotation, as

indicated in Fig. 3 by an arrow, is clockwise as seen from above.

For rotation of the jack 32 the lower end of the spindle 42 carries a gear 48 (Figs. 2 and 3) driven by power transmitted from a motor 50 (Fig. 1), through a suitable one-revolution clutch generally designated 52 (Figs. 2 and 3), and a gear train about to be described. The motor 50, mounted on a crossbar 54 of a table-like machine frame 56, drives, by means of a belt 58 and a pulley 60, a stub shaft 62 having bearings in a gear box 64, bolted to the underside of the top of the frame 56. This stub shaft 62 carries a bevel gear 66 (Fig. 3) in mesh with a bevel gear 68 for continually rotating :1 vertical post 70 (Figs. 2, 3 and 13), while the motor 50 is running, the post 70 being operatively connected to the tool 30 as will be subsequently explained. By a chain 72 and sprockets 74, 76 the stub shaft 62 also drives a cross shaft 78 (Fig. 3) coupled by means of the clutch mechanism 52, hereinafter briefly described, to a driven shaft 80. The driven shaft 80 is rotatably mounted in a bushing carried by a housing 81 and carries a worm gear 82 meshing with a gear 84 mounted on a vertically disposed shaft 86 journaled in the housing 81. The housing 81 is supported by a pair of channel bars 90 mounted on the machine frame. Affixed to an intermediate portion of the shaft 86 is a smaller gear 92 that meshes with a relatively large gear 94. The latter is rotatably mounted on a vertical pivot pin 96 having bearings formed in the top of the frame 56 and a bracket 98 (Fig. 4) secured thereon. The gear 94 is, in turn, in mesh with a gear 10!- afiixed to a vertical shaft 102 received in a sleeve bearing 104 mounted on the machine frame. At the upper end of the shaft 102 a rotary cam folder 106 (Figs. 1 and 4) is mounted for purposes hereinafter explained. It is the pivot pin 96 on which the above-referred-to plate-like arm 46 is mounted for oscillation. An idler gear 108 rotatably mounted on a stub shaft 110 received by and secured to a hub formed on the underside of the arm 46 meshes with both the gears 94 and 48 to rotate the latter and hence the jack 32.

For oscillating the jack 32, the arm 46 is pivotally connected by a pin 112 (Figs. 3 and 4) to one end of a link 114 having its other end pivotally supported by a jam-preventing link 116 (Figs. 2 and 3) pivotally mounted on a bracket 118 secured to the frame 56. A roll 120 rotatably mounted on a pin affixed to the link 114 is arranged to be received by a closed cam track 122 formed in the upper side of a cam plate 124 secured to the upper end of the shaft 86. Accordingly, as the gear 48 is rotated to revolve the shoe-supporting means it also causes the cam track 122 to effect, via the roll 120 and the link 114, a swinging movement of the arm 46 about the axis of the pivot shaft 96. In order that the arm 46 2,739.,saa.

fnaythus oscillate;horizonta1ly the frame 56.issprovided. with.a..slot- 128 affording passageway, for the bearing. 44,1

the. stub. shaft 110, and the pin 112.

Any suitable type of single' revolution clutch may be employed, the conventional. illustrative mechanism 52 being of the axially shiftable pin-and-collar construction and controlled by a latch 130'pivotally supportediat one.

end and connected lat its other end to a starting .plunger 132 extending through the frame 56 'and'having mounted thereon, between the frame and a collar secured on the plunger, a compression spring 134, .The pivotal support of the latch 130 is afforded by nut-."ld-bolt connections with a lever 136 (Figs. 2, 3, 3A and 3B) h'aving,an end fulcrumed-on a vertical pin 138 fast on abracket 140 (Fig. 2) mounted on a channel bar 90'. The lever 136 extends into the path of a pair of 'rolls' 142, 142, respectively, suspended from pins 144'affixcd 180 apart in a disk 146. The latter is adjustably bolted to the hub of the gear 94. Thus, as viewed in Fig. 3, one revolution of the gear 94 will twice cause the lever 136 to be displaced clockwise about the pin 138,- the lever beingyieldingly urged into the path of the rolls 142,-142'.by atension spring 148 connecting it with the housing 81. (Figs. 2, 3;,3A and 3B) pivotally mounted on the pin 138, carries a pin 152 for pivotally supporting a springpressed detent 154 having a shoulder 156 engageable with a shoulder formed on the latch 130. With the starting plunger 132 in normal position, and the shoulder on the latch 130 engaged by the shoulder 156, each clockwise displacement of the lever 136 acts through the latch 130 and the detent 154 to swing the yoke 150 clockwise. A clutch collar 158 (Fig. 3) is provided with a groove for receiving shoes carried by the yoke 150 and the latter is accordingly effective to shift the collar out of .driving engagement with the shaft 78. Compression springs (Fig. 3), mounted in an end face of the shaft 80, normally act to shift the clutch collar 158 axially back into driving relation with the shaft 78 when the starting plunger 132 is retracted, the influence of such. springs b'eingstronger'than the spring backing. the detent 154. It will therefore be seen that, though the motor 50 may run continuously, the illustrated arrangement is such that upon retracting the plunger 132 the gear 94 will be permitted to rotate 180' to drive the jack-carrying spindle 42 one complete revolution, and toward the end of that revolution the second of the rolls 142 will displace the lever 136 to disengage the clutch mechanism and stop rotation of the jack 32.

Means are provided for accommodating different sizes and styles of shoes in bottom-up position on.the jack 32. The jack comprises a horizontal base plate 170, Figs. 5 and 6. afiixed to the flatted upper end of the spindle 42. Secured in bores formed in bosses 172 integral with the plate 170 is a pair of relatively fixed parallel guide rods 174, one at each side of the plate 170, extending lengthwise of the shoe S when jacked. Centrally mounted in the plate 170 is a fixed hub on which a gear 176 and a segment gear 178 integral therewith are rotatably mounted. A toe bracket 180 slidably receives a vertical sleeve 182 in which a toe rest stem 184 is threaded for heightwise adjustment. A threaded collar 186 on the stem locks the toe rest 34 and its stem 184 in adjusted position. An inclined cam 188 affixed to the plate 170 is engaged by the bottom of the sleeve 182, contact being maintained by gravity acting on the latter. The toe bracket 180 is providcd with a pair of forward bearing bosses 190 for receiving the rods 174, respectively, and a rearward boss 192 for receiving one of the rods 174 and carrying a rack 194 (Fig. 6) arranged to mesh with the gear 176. A heel bracket 196 has a longitudinally extending kerf 198 (Figs. 6 and 8) through which a projection 200 of the plate 170 extends upwardly to support, by means of a setscrew 202, a cam block 204 provided with inclined grooves extending'on its opposite sides, respectively. The heel rest 36, slidably mounted on the block 204, is provided with a A. yoke 150' rabbetedpprtion. for cooperation withsaid cam grooves an'd'is' adaptedwith a..V-like portion foraccommodating.

the sides of a last heel cone. The heel bracket 196 has a pair of heelward .bosses 206 for receiving therods 174,

- respectively, and'a toeward boss 208 for receiving one'of ably moved apart lengthwise of a shoe by actuation of a treadle 212 (Fig. 1) fulcrumcd on the frame 56 and yieldably supported by, a spring 214 depending from an upper portion of the frame. Thedower end of a bell crank 216 pivotally mounted on the frame 56 is operatively connected to the treadle by a link 218 and the upper end of the crank 216 is pivotally connected to a link 220. The latter is connected to a rod 222 slidably mounted in alined.bores formed-in a bracket 225 bolted to and projecting upwardly from a rear bracket 225 mounted on the frame 56. I

A shifting rod 226 (Fig. 5), alined endwise with the rod 222 and adapted to receive an adjacent end of'the latter, is movable endwise through a boreformed in'an upright arm 228 integral with the plate and through a bore in the toeward boss 172. On being urged forwardly by depression of the treadle 212, the shifting rod 226 carries forwardly a block 230 affixed thereon and abutting a shoulder 232 of the toe bracket 180. As a consequence, that. bracket is moved forward with its rack.194 which acts through gears 176 and 178 and the rack 210 to move the heel bracket 196 rearwardly to a corresponding extent, thereby permitting insertion of a last with its shoe in the jack 32. Such rearward movemcntof the bracket 196 also serves other functions to be later explained. Lengthwise separation of the two brackets 180, 196 is yieldingly resisted, a tension spring 234 being connected'to a stop collar 236 secured to the shifting rod 226 and a fulcrum pin 238 affixed to the arm 228, and two additional tension springs 240, 240 being respectively connected between opposite bosses. 190 of the toe bracket and opposite extensions 242, 244 of the plate 170.

For abutting the toe end of the shoe to hold it clamped the toe bracket 180 carries an upright toe abutment arm 250' and the latter has a pair of transversely extending pivot pins 252 (Figs. 5 and 7) the opposite ends of which pivotally support parallel links 254 respectively extending upward to support a pair of parallel couplings 256 between which the toe fork 38 is mounted. A tension spring'258extends forwardly from the arm 259 to connect with one of the links 254 to urge the fork into clamping relation with a jacked shoe.

For abutting the heel end of the shoe to hold it clamped in cooperation with the toe fork 38 the heel fork 40 and associated parts are mounted as shown in Figs. 5, 6, 8 and 9. The heel bracket 196 (Fig. 8) supports a pair of transverse pivot pins 260, 262 the opposite ends of which pivotally support parallel links 264 for mounting at their upper ends the heel fork 40. A heel abutment arm 266 secured to the bracket 196 is connected to one end of a tension spring 268 having its other end connected to the rear of the heel fork 40, the spring 268 thus yieldingly urging the heel fork forwardly and thus coacting with the toe fork 38 to centralize a shoe with respect to the axis of the spindle 42. To permit the rest 36, and hence the heel bottoms, to be suitably adjusted heightwise for various shoe sizes, a pin 270 (Figs. 5 and 8) fixed in a transversely extending bore formed in said rest extends through a pair of vertical slots 272 in the bracket.

Means is also provided for automatically clamping the heel end of the jacked shoe against the rest 36. A holddown clamp 274 (Figs. 5 and 7) is secured to an upright arm-276 of a bell-crank lever 278 pivotally supported by the pin 262. A forwardly extending arm 280 (Fig. 9) of the bell crank lever 278 supports a square cam follower 282 adapted to ride in a cam slide 284 formed in the upper end of a lever 286. The lower end of the latter is" pivotally connected to apivot pin 288 mounted in one end of a link 290 (Fig. 5) which is pivotally secured at its other end to the arm 228. The lever 286 is fulcrumed on a pin 292 mounted in one end of a bellcrank lever. 294 which itself is pivotally supported by' the arm 228 and is actuated by a cam roll 296 mounted at the other end of said lever. This roll 296 engages and is moved heightwise by an inclined cam 298 affixed to the shifting rod 226. It will be noted that the parallelogram of linkage, including the link 290 and the lever 286, as controlled by the bell-crank lever 294, appropriately positions the cam slide 284 heightwise, thus adjusting the holddown 274 to operative position for any size shoe which may be jacked. A tension spring 299 conmeeting 'the heel bracket 196 with the lever 278 acts through the follower 282 to hold the roll 296 in contact with the cam 298.

For determining the operating path of the tool 30 in roughing a shoe S having a bottom of a particular size and of a particular letter width, a pair of horizontally disposed heelless bottom patterns 300 and 302 (Figs. 5 and 11), the largest and smallest to be operated on of that width and corresponding style, respectively, is detachably mounted with their faces in spaced relation on a fiat portion of the spindle 42 and beneath the plate 170. The patterns 300, 302 arejoined by a U-shaped web 304 for receiving the fiat portion of the spindle. A base 306 on which the pattern assembly is supported is integral with the spindle and comprises a heel end 308 complementing the lower pattern 300 and having a V-shaped cam groove 310 for a purpose later to be described. A heel-end piece 312, complementing the upper pattern 302, is fixedly secured to the plate 170. A spring-pressed detent 314 (Figs. 4 and 5), mounted in the base 306, normally projects into a hole formed in a projection 316 (Fig. 11) of the pattern assembly to lock the latter in operative. position. From the structure described it will be understood that one pair of such patterns 300, 302 is used when operating on right shoes of a given width and 'another pair of patterns would be substituted if left shoes,

or shoes of a different style and width, were to be treated. It will subsequently be more readily appreciated that without any great alteration of the illustrated machine, arrangement could be made for operating on either rights or lefts by simply inverting the patterns of a single set to convert the machine from right shoe roughing to left shoe roughin and vice versa.

For operation on the bottom of the shoe S (Fig. 20) jacked in the machine, automatically acting grading mechanism cooperating with the shoe-supporting means 32 in general and the patterns 300, 302 in particular is provided to suitably influence the operating path of the tool 30. The patterns 300, 302 are, in effect, rotary cams against the respective peripheries of which rolls 320, 322 (Figs. 5, l2, l8 and 19) are arranged for progressive engagement. A point of contact between the roll 320 and the pattern 300 peripherally corresponds in phase with the point of contact between the roll 322 and the pattern 302, and the two points of contact thus establish a movable gradient. The tool-driving post 70 (Figs. 2, 4, l3 and 18) extends upwardly through a spacer portion 324 of the gear box 64 and a vertical sleeve bearing 326 resting thereon. Rotatably mounted on the bearing 326 is a sleeve 3.28 formed at its upper end, for a purpose later explained, with arms 330, 330. respectively, providing alined bearings for a countershaft 332 carrying a bevel gear 334 that is. in mesh with a bevel gear 336 fast on the upper end of the post 70. Secured to the sleeve 328 is an angular bracket 338 (Figs. 4, l3 and 18) provided with bosses for receiving a vertical pin 340 affording a fulcrum for one end of an arm 342 having at its other end a forked portion for ro atably mounting the roll 322. Also pivotally mounted on the pin 340 is an arm 346 for rotatably carrying the roll 320. As best seen in Figs. 12, 14 and 19, the arm 342 pivotally supports a grading plate 348 having a slot 350 for receiving a pin 352 fixed in the arm 346. Thus'the arrangement is such that when the contact points of the rolls 320, 322 on the patterns 300, 30?. are in exact vertical alinement, the plate 348 is exactly vertical but remains free to assume the same variable inclination as may be imposed by the rolls 320, 322 in traversing the rotating-oscillating peripheries of the patterns 300, 302, respectively. For yieldinglyurgiug operative contact between the roll 322 and the pattern 302 a tension spring 354 (Fig. 4) connects the arm 342 with a bracket affixed to the frame 56, and means later described similarly act on the roll 320 to urge it into contact with the pattern 300. As will hereinafter become apparent, the plate 348 affords no (zero) grading when exactly vertical but, when inclined from the vertical, the degree of grading or displacement to be transmitted to the tool 30 from the plate 348 at any instant is dependent upon both the extent of the plate inclination and the particular point of reference on the plate, considered heightwisc, from which grading is taken. In other words, for any gradient, i. e., considering the plate 348 to have a particular inclination at any given point in the cycle of the machine, the magnification in operating path from the small pattern 302 and/ or the diminution from the large pattern 300 to be transmitted to the tool 30 is proportional to the position heightwise of a point of reference on the plate. Accordingly, means is provided for translating or converting the size of the shoe S into a heightwise measurement on the plate 348. For this purpose the heel bracket 196 (Fig. 5) has in its bottom a transverse cam groove for accommodating a roll 356 mounted on one end of a rack 358. The latter is arranged to extend lengthwise of the shoe S when in its starting position and is slidable in a guideway formed in the bracket 225. A gear 360 in mesh with the rack 358 is fixedly mounted on one end of a shaft 362 rotatably mounted in bearings formed in the bracket 225. Fast on the other end of the shaft 362 is a gear 364 (Figs. 13 and 14) meshing with a vertical rack 366 which is slidably mounted in alined bores formed in the bracket 225. A roll 368 is secured to the rack 366 and is arranged to be received by a horizontal slide 370 concentric with the axis of the post 70 and mounted on a pin 372 (Figs. 4 and 12) for vertical movement thereon. The pin 372 is carried by lugs 374 secured to the sleeve 328. Integral with the slide 370 is a grading arm 376 one end of which is disposed to slide in a vertical guideway 378 (Figs. 4 and 18) formed in the sleeve 328 and the other end of which is forked to support a roll 380 (Figs. 12, l4, l8 and 19) engageable with the grading plate 348. The point of contact between the roll 380 and the plate 348 provides the heightwise "point of reference" above mentioned. A tension spring 382 (Fig.4) connecting a projection of the sleeve 328 with the frame 56 urges the roll 380 yieldingly into contact with the plate 348. It will be noted that the grading is thus a consequence of the arm 376 acting to rotate the tool-carrying sleeve 328 on its bearing 326 an extent dependent on the height of the roll 380 as determined automatically by the shoesupporting means 32 engaging the shoe S.

It will be understood that an alternative grading means, in lieu of the two patterns 300, 302 and the plate 348, might well employ a single master model 570 such as is illustrated in Fig. 25. This model 570 would, in effect, extend to fill the space between the patterns 300, 302 and constitute a model having a conical edge face and comprising the peripheral contours of a graded series of shoe bottoms of the same style and letter width but different sizes. In such an arrangement the roll 380 would progressively contact the conical surface of this master model 570 to determine the "point of reference" and thereby appropriately influence the grading movement of the tool 30 about its vertical axis.

For locking the roll 380 heightwise when positioned as just explained, automatic means are. actuated near. the start of .the machine cycle. One'cndJofabell-crank lever 384 (Fig. 4) carries a roll 385 engageable with the walls of the cam groove 310 when at the starting position. The lever 384 is part of a toggle and is fulcrumed on a stud 388 fixed in the bracket 225, the other end of the lever 384 having a pivot pin connection with an arm 390 (Fig. 23). The arm.390 has a portion bored endwise that is received in the tubular end of an am 392. A compression spring 394 is seatedin the arm 392 and abuts an end of the arm 390. For uniting the arms 395), 392 as, in effect, a single compressive link a screw 396 extends axially through the s ring. 394 and is engaged by a clamping bolt 398 extending through a slot 400 formed longitudinally of the arm 392. The arm 392 is pivotally connected at one end to a pin 402 slidably mounted in a bearing formedin the bracket 225. The pin 402 is arranged, when the toggle is straightened upon interaction of the roll'386 and the groove 310, to engage the rack 366' andthus clamp it against heightwise movement. The effect of the spring 394.is to cushion the the clamping according to the adjustment of the bolt 398 in its slot 400. The grading roll 380 is thereby fixed heightwise, but not laterally-of the patterns 300,302, until the operating cycle is concluded. The shape of the cam groove 310 is such that, upon reentry of the roll 386 at the close. of the cycle, the toggle is brokenand the rack 366is free to be readjusted vertically, if need be, for the next roughing operation. Threaded into opposite sides of a bracket 404 secured to the frame 56'are a pair of stop screws 406, 406' for limiting displacement of the knee of the toggle on either side o dead center.

During the operating cycle the variable grading displacements transmitted by the arm 376'to the sleeve 328 are further transmitted by the countershaft 332'to the tool 30 but, by means now to be explained, an additional motion is imposed on the tool to move its work-engaging contact back and forth horizontally and transverse to its axis of rotation and so provide a-rougL ng path of adequate width that avoids excessive abrasion along a single line on the shoe bottom. Referring to Fig. 21, opposite ends of the countershaft 332 are formed to provide balllike eccentrics 410, 410 having their respective centers equally offset on opposite sides of the axis of the shaft 332. The halves of a bearing block 412 (Fig. 22), in which each of the eccentrics is nested, are secured together by screws 414 and each block 412 is mounted in an end portion of a yoke 416; a tubular portion of which affords a sleeve bearing for a shaft 418. These end portions of the yoke 416 are each formed with a vertical slidewuy 423 and are respectively secured by screws 417 to spacers 419 each of which is adapted to receive a hardened slide block 421 mounted on an end of the countershaft 332. Lateral displacement of the tool 30 is effected by the lateral displacement of the eccentrics 410 acting on the block 412 and the yoke.416. Vertical displacements of the eccentrics 410 merely represent lost motion as each block 412 slides heightwise in its slideway 423 without thus moving the block 412 or the yoke 416. In order to prevent binding, the outer faces of the slide blocks 421 are rounded and their inner faces, together with those of the spacers 419, are normally separated from the outer end faces of the yoke arms 330, 330. A bracket 420 bolted to the yoke- 416 covers drive gears adjacent to the top of the post 70 and provides a bearing for a. double bevel gear 422 (Fig. 13) coaxial with said post. The gear 422 is driven by the gear 334-and transmits rotation to the shaft 418 by means of a gear 424 fixed on one end thereof. The roughing tool 30 is fixedly mounted on the other end of the shaft 418, the tool being held against axial movement in one direction by a collar 426 pinned to the shaft and against movement in the other direction by locknuts 428'threaded on the shaft 418. It should be noted that-throughout'an'opcrating cycle the shaft 418 is disposed so'as-to carry the" tool 30 in a plane. extending;substantially;tattright angles. to.the.

path of successive. marginalportions.to. be roughened. A yoke 429 (Figs. 15, 20 and 21), bolted to the yoke 416, is actuated hydraulically, as later explained, to swingv the tool 30 heightwise about the countershaft 332 as turning axis.

When the jacked shoe is in its starting position, as shown in Fig. l, the tool 30 is in a position removed from the shoe bottom. Upon commencing a cycle. of operation, means'to be described are automatically actuated t'cr swinging the tool over the shoe and forlowering.

the tool into operative engagement with .theheel-breast area of the shoe bottom. These means also act toward.

the end of the cycle, i. e., when the opposite corner of the heel-breast area is reached, to raise the tool 30 and then return it to'the removed position. Bolted to a flange formed on the bearing is a can1430 (Figs. 4,.5 and .12) that is engaged by a roll.432 mountedin-one end-.of a. bell-crank lever 443. This lever is pivotally mounted on a fulcrum pin 436 supported by a bracket 438 that is aifixed to the top of the frame 56. The other end of the bell-crank 434 carries a roll 440 arranged to cooperate with a cam-shaped end 442 of an arm 444 (Fig. 14) bolted to the angularbracket 338. A tension spring 446 (Fig. 4) connected between the bracket 438 and the bellcrank lever 434 maintains the roll 432 in engagement with the cam periphery of the cam 430, the single throw in the latter being effective initially, as best visualized in Fig. 4, to permit the spring 382 to maintain contact between the cam end 442 and the roll 440 as the tool 30 is thusswung clockwise (as viewed from above) over the shoe bottom. At the close of the cycie, the throw of the cam 430 causes the roll 440 to return the tool 30 to inoperative position by moving the cam end 442 against the tension 01' the spring 382.

When over the heel-breast area the tool 30 is automatically lowered intooperative engagement with the shoe bottom by hydraulic pressure mechanism, subsequently, described, which is controlled by a cam follower 450 (Figs. 5, 12, 14 and 18) that is mounted on one end of a bell-crank lever 452. The latter is pivotally mounted in.a-bearing bracket 454 -secured .to the bracket 338 and has a curvedarm that is forked to receive a screw 456 (Fig. 14) mounted in a collar 458 fast on a control rod 460 (Figs. 4, 13, 14, 15 and 24) hereinafter further mentioned. The lever 452 is actuated to move the rod 460 upward:(thereby to lower the tool 30) on lowering ofthe follower 450 by its engagement with a cam surface 462 (Figs. 5 and 18) formed on an arm 464 bolted to the heel bracket 196, as shown in Fig. 12. A cam surface 466 of the arm 464 is arranged to engage the follower 450 to move it upwardly at the close of the operating cycle thereby to lower the control rod 460 and raise the tool 30 from the shoe.

Additional means are provided for automatically controlling the above-referred-to hydraulic mechanism at selected times'in a cycle, thus effecting or interrupting roughing by the tool 30 on predetermined portions of the shoe bottom. Referring to Figs. 4, 4", 4 4 and 4 a horizontal rod470 is slidably mounted in bores formed in the bracket 225 and in a bracket 472. One end of the rod 470 has-teeth'for meshing with .agear 474 fast on the shaft 362 and the other end supports a pair of arms 476 journaled to rotatably support a pin 478. Splined on the pin 478, but rotatably carried by anarm 480 fixed to the rod 470, is a cam wheel 482 (Fig. 4) that is provided with six spaced projections arranged to be engaged, respectively, by a series of similar cams 484 radially and detachably mounted on the rotary holder 106. Each cam 484 may be adjustably clamped to the holder 106 to engage a projection on the wheel 482 after any desired degree of rotation of the holder 106, as will now be discussed.

Asnoted in.Figs. 4 andt4 ,,each cam.484.is hinged and clamped on the holder 106 either-coincident with a true radius thereof or angularly inclinedto a radius,

Images