US2327392A - Machine for shaping uppers over lasts - Google Patents

Machine for shaping uppers over lasts Download PDF

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Publication number
US2327392A
US2327392A US444445A US44444542A US2327392A US 2327392 A US2327392 A US 2327392A US 444445 A US444445 A US 444445A US 44444542 A US44444542 A US 44444542A US 2327392 A US2327392 A US 2327392A
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pincer
shoe
machine
last
insole
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US444445A
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Corwin W Baker
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United Shoe Machinery Corp
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United Shoe Machinery Corp
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    • AHUMAN NECESSITIES
    • A43FOOTWEAR
    • A43DMACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
    • A43D25/00Devices for gluing shoe parts
    • A43D25/047Devices for lasting with adhesives or for gluing together insoles and uppers
    • A43D25/053Devices for lasting with adhesives or for gluing together insoles and uppers with rotating gripping means

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  • This invention relates to machines for shaping shoe uppers over lasts and is herein illustrated as embodied in a lasting machine in the use of which successive portions of an upper are progressively tensioned and worked into lasted position on the insole of a shoe.
  • the object of the invention is to provide an improved machine, simple in construction and operation, for lasting in a quick and effective manner shoes in Which cement is used to secure the overlasted margin of the upper to the insole.
  • a feature of the invention resides in the combination with means operating intermittently to grip and pull successive portions of an upper over a last, of means acting substantially continuously on the previously cemented margin of the upper, adjacent to the pulling means, to wipe the margin inward over an insole on the last while imparting to it a plurality of pressure impulses, heightwise of the last.
  • the margin laying means consists of a continuously driven rotary wiper having upon its periphery spaced projections so that it not only wipes the margin of the upper overthe insole but continuously pounds or subjects said margin to a rapid series of pressure impulses.
  • This wiper mechanism as shown, is similar to that disclosed in my prior application for Letters Patent of the United States, Serial No. 403,737, filed July 23, 1941.
  • the upper gripping and tensioning means consists of a pincer which operates intermittently to grip and pull the upper, in contrast to the gripper rolls in the machine disclosed in my said prior application, which rolls operate continuously.
  • Invention is also to be recognized in a mounting for such a pincer constructed and arranged to permit the pincer jaws to oscillate about an axis parallel to the bottom face of the insole of a shoe being operated upon and transverse to the shoe, to cause the upper to be simultaneously tensioned heightwise of the last and the shoe to be fed progressively through the machine.
  • a further feature of the invention resides in such an oscillatable pincer constructed and arranged also to permit movement of its jaws radially of their normal arcuate path of movement as may be needed to increase the tensioning effect upon the shoe upper.
  • manual means is provided for varying the extent of the radial movement of the jaws so that the tensioning efiect of the pincer upon the shoe upper may be varied at will by the operator, even while the machine is in operation.
  • the invention also provides, in combination with the lasting instrumentalities of a lasting machine, a tack pulling tool and means for operating the lasting instrumentalities and the tack pulling tool simultaneously.
  • the machine is provided with an oscillatory table upon which both the lasting pincer and the, tack pulling tool are carried and with which they oscillate in different arcuate paths, the tack puller normally moving in a path remote from the shoe and being ineffective but being arranged to be projected at the will of the operator into operative relation to the shoe.
  • a shoe bottom rest movable between effective and ineffective positions, is provided, together with means for moving it to effective shoe gaging position during each pause in the intermittent feeding movement of the shoe and retracting it to ineffective position during each increment of said movement.
  • a still further feature of the invention resides in the provision of means for pressing the mar ginal portion of an insole against the bottom of the last and wiping it out smoothly toward the edge of the last.
  • This wiping means preferably operates in advance of the rotary Wiper which lays the margin of the upper inward over the insole and greatly facilitates the production of a smooth shoe bottom when thin or soft insoles are used, they frequently having a tendency to become bunched up at spots, preventing the accomplishment of a perfect lasting operation.
  • FIG. 1 is a view of the machine in front elevation
  • Fig. 2 is a plan view
  • Fig. 3 is a view in elevation with portions broken away, looking from the right-hand side of the machine;
  • Fig. 4 is a perspective view of the pincer operating mechanism
  • Fig. 5 is a plan view showing a detail of the pincer
  • Fig. 6 is a plan view of a detail of the mechanism for opening and closing the pincer jaws
  • Figs. 7 and 8 are perspective views of mechanisms for operating the insole smoothing finger and the shoe bottom rest.
  • Figs. 9, 10, 11 and 12 show views of details of the mechanism shown in Fig. '1.
  • I indicates a supporting column upon which is mounted a frame or casing I2 containing the operating mechanism of the machine. Power is supplied to the machine by a driving belt I4 which engages a pulley I6 upon a main shaft I8 running in bearings 20 formed in the stationary frame I2.
  • a gear 22 (Fig. 1) afflxed to the shaft I8 meshes with, and drives, a similar gear 24 secured to a countershaft 26 upon which is an eccentric 20 (Figs. 3 and 4).
  • the eccentric 28 is connected by an eccentric rod 30 through a ball and socket joint 32 to the outer end of a swinging arm 34 having a split hub 36 which is secured by a clamping bolt 38 upon the lower end of an upright sleeve 40.
  • the pincer comprises a stationary upper Jaw 48 and a movable lower jaw 50'.
  • the lower Jaw 60 is mounted for pivotal movement about a horizontal stud 52 (Fig. and the rear end of the jaw member carries a, laterally projecting pin 54 to which is pivotally connected a vertical rod 56 passing downward through the sleeve 40.
  • the lower end of the rod 56 rests in a socket member 58 (Figs. 1, 3 and 6) adjustably threaded through an ear 60 which is a part of an arm 62.
  • the arm 62 is bifurcated and mounted to swing vertically about a horizontal pivot pin 64 mounted in a stationary bracket 66 which is bolted down to the machine frame.
  • a stiff compression spring 68 surrounds the rod 56 and bears upon a washer I0 supported by a nut I2 threaded upon the lower end of the rod. By adjustment of this nut the tension of the spring can be varied. The spring 68 tends to close the pincer 44 and to hold the lower end of the rod 56 down in engagement with the socket member 58.
  • a rod 74 the, lower end of which passes loosely through a hole in an ear it formed on the arm 62 and has a nut i8 screwed upon its lower end.
  • the upper end of the rod I4 is pivoted at 80 to a rocker arm 82 mounted upon a rockshaft 84 to which is secured a lever 86 having its outer end connected by a treadle rod 08 to a treadle (not shown).
  • a lever 00 pivoted upon the pin 64 between the arms of the bifurcated portion of the arm 62, is arranged to engage the under side of the said arm and the rear end of the lever carries a cam roll 02 (Figs. 3 and 6) which engages a cam 94 upon the shaft 26, the roll being held against the cam by a spring pressed plunger 96 housed in the lever 90 and bearing upon the base of the bracket 86.
  • the cam 0415 so timed relatively to the eccentric 28 that it will cause the pincer to be opened at the end of its horizontal swinging movement in one direction and held open while it is returned to its starting position, whereupon it will be closed to secure a new grip on the margin of the shoe upper, it being understood that the horizontal oscillatory movement of the pincer in an arcuate path is for the purpose of feeding the shoe progressively past the tools which operate upon it as well as to tension the upper.
  • a reciprocatory slide 98 connected by a link I00 to a pivot IOI on a block I02 which is slidable in an arcuate guideway I04 in a rocker member I06 aflixed to the upper end of an upright rockshaft I08.
  • a clamping bolt IIO passing through a split hub II2 (Fig.
  • slidable block I02 is a swinging arm II4 which is connected by a link II6 to an arm II8 integral with the swinging arm 34 but extending in the opposite direcgim therefrom relative to the axis of the sleeve
  • the reason for the slidable block I02 is to provide for adjustment of the eccentricity of the pivot IOI relative to the axis of the shaft I08 and to this end the block is connected by a link I20 to a lever I22 movable about a stationary pivot I24 and connected, in turn, by a link I26 to an upright arm I20 of a bell crank lever movable about a stationary horizontal pivot pin I80.
  • the second arm I32 of the bell crank lever is connected by a treadle rod I34 to a treadle (not shown) by the actuation of which the block I02 may be 50 adjusted lengthwise in the guide I04 that the pivot IOI is either concentric with the axis of the shaft or eccentric thereto by any desired amount.
  • the shifting of the pivot IOI may be effected at any time and to any desired extent, regardless of whether the machine is running or not, and when the pivot is offset from the axis of the shaft I08 the rocking movement of the said shaft, derived from the arm H8 and transmitted by the link II6, will cause the slide 98 and the pincer carried thereby to be reciprocated in proper time relation to the movement of the other elements of the mechanism, to exert additional pull or tension upon the shoe upper in the grip of the pincer during each increment of the work feeding movement, the length of the pincer stroke being determined by the distance iaaggween the pivot WI and the axis of the shaft
  • a box-lik guide member I38 in which is a longitudinally movable slide bar H8.
  • the tack pulling tool 46 is secured to the front end portion of the bar I38 by a screw I40 and a compression spring I42 housed in a bore in the bar tends at all times to move the bar rearward to the retracted position shown in Figs. 2 and 4 in which position the tack puller is ineffective.
  • a roll I43 upon the rear end portion of the bar is arranged to be engaged by a cam face I44 formed upon an arm I46, one end of which is movable about a stationary pivot I48 and the other end of which is connected by a link I60 to an arm I52 of a bell crank lever movable about a stationary pivot I54 and having its other arm I56 connected by a link I58to an arm N0 of another bell crank lever pivotally mounted upon the pin I30.
  • the second arm I62 of the last-named bell crank lever is connected by a,
  • treadle rod i to a third treadle (not shown) by actuation of which, through the connections just described, the arm M6 may be swung forward about the pivot lit to cause the cam face Mi t to enga e the roll lit and project the bar tilt and the tack pulling tool tit forward to operative position where it can operate to pull out any pulling over tacks that may project from the bottom oi the shoe.
  • the bell crank lever is a cam roll id l which is held in engagement with the cam so by a spring iliii (Fig. 3) enclosed in a stationary housing its and bearing upon a boss tilt formed upon the arm Hill.
  • the stroke of the bottom rest ltd is short and the purpose in keeping it continually recip rocating is to facilitate the movement of the shoe as it progresses during the lasting operation.
  • the timing is such that the bottom rest will be projected forward to effective position in contact with the shoe bottom in the period when the pincer jaws are open, between successive movements of the shoe, and will be retracted a short distance to ineilective position while the jaws are closed and the shoe is being fed along.
  • a wiper finger use (Figs. 1 and 7) designed to engage and wipe the marginal portion of the in" sole, pressing it against the bottom of the last and smoothing it out toward the edge thereof.
  • This wiper finger is mounted in a rocker member II 92 which is journaled upon a pivot shaft i it secured in a cradle Idi'i.
  • the cradle tilt is journaled on the forward portion of a hollow sleeve its so as to be capable of oscillatory movement relatively to the sleeve, about the axis of the sleeve.
  • An arm 2% extending rearward from the rocker member W2, and integral therewith, contains a compression spring 282 the lower end of which bears upon the cradle I96 and tends at all times to swing the rocker member relatively to the cradle in a counterclockwise direction, as viewed from the right hand side in Figs. 1 and '7.
  • the sleeve I98 is journaled for oscillatory movement in a bearing in the frame i2 and has amxed to its rear end portion a rocker arm 204 which is pivotally connected by a ball and socket Joint 2% I a. crank member 2 from the rear face 01' which projects 9. lug 2IB. Figs. 9 and 11.
  • This lug is disposed in a radial slot 2m formed in the cred die iiit, the slot being substantially wider than the lug and the lug being normally held against one side oi the slot by a compression spring are contained in a housing ltd forming part oi the cradle.
  • the sleeve lid when the sleeve lid is oscillated it will, through the crank member tit and the lug dill, cause the cradle let to oscillate with the sleeve, about the axis of the latter.
  • the oscillation of the cradle may be stopped at any time by swinging it a short distance in a clockwise direction as seen from the front of the machine.
  • a connecting rod 232 Extending through the bore of the sleeve 095i is a connecting rod 232 the front end of which has a socket surrounding the ball end 236 of a pin 2% which passes through a supporting. arm
  • the structure just described permits the rocker member W2 and the finger tilt to be oscillated about the axis of the shaft i941 by reciprocation of the connecting rod 232, provision for yielding when the finger Hid encounters resistance being made by the ability of the pin 236 and the sleeve Zliii to leave the hook wi l, these parts being normally held in contact by the spring 202,
  • the rear end of the connecting rod 232 is pivotally connected by a ball and socket joint to an upright arm 2% (Fig. 7) pivoted on a pin 2513 supported in a stationary bracket 2E2 bolted to the machine frame.
  • a horizontal arm 2% Integral with the arm 2 th is a horizontal arm 2% carrying a cam roll 2% which engages a cam 253 afilxecl to the left hand end portion of the countershaft 26 (see Figs. 1, 2 and 7).
  • a compression spring 260, Fig. 3, contained in a stationary housing 262 bears on the enlarged rear end portion 264 of the cam roll arm 25%, holding the cam roll in engagement with the cam.
  • the cam 258 is so timed relatively to the eccentric 28 that the wiper finger I90 will be simultaneously rocked, about the pivot shaft I94, into engagement with the insole of the shoe and, about the axis of the sleevel98, toward the edge of the last, while the pincer M is moving toward the left, as viewed in Fig. 1, during which time the pincer is pulling the upper over the last and feeding the shoe leftward.
  • the finger I90 thus wipes out the marginal portion of the insole smoothly against the bottom of the last in ad- Vance of the engagement of the margin of the shoe upper by the upper margin laying means 214 presently to be described.
  • An edge gage roll 266 for determining the position of the shoe vertically in relation to the pincer 44 is carried by a rod 268 supported by a bar 210 mounted in a bracket 212 bolted to the machine frame.
  • a rotary wiper 214 similar in structure and operation to that disclosed in my aforesaid prior application for Letters Patent of the United States Serial No. 403,737, filed July 23, 1941, is rotatively mounted upon a stud 216 secured in an angle plate 218 adjustable along an arcuate slot 280111 a stationary upright bracket 282.
  • a pulley 284 fast to the rotary wiper 214 receives power from a belt 286 driven by a pulley 288 affixed to a countershaft 280 which is continuously driven from the shaft I8 through a belt 282.
  • the plane of the wiper can be adjusted to any desired inclination to the vertical and slots 284 in the base of the bracket 282, through which pass the bolts which secure the bracket to the machine frame, permit adjustment of the entire wiper supporting structure horizontally, to vary the distance between the wiper and the pincer 44.
  • the shaft I8 is driven continuously.
  • the treadle rod 88 is depressed to open the pincer jaws and stop the wiping action of the insole wiper finger I80, permitting the marginal portion of the shoe upper to be inserted between the pincer jaws with the shoe positioned against the edge gage 268 and in the range of operation of the bottom rest finger I66.
  • the treadle to which the rod 88 is connected is then released, whereupon the pincer jaws 48, 50 seize the margin of the shoe upper and simultaneously feed the shoe in the direction indicated by the arrow upon the shoe in Fig. 2 and tension the upper over the last with more or less force depending upon the position of the slidable block I02, which may be shifted at will during the operation of the machine bygreater or less depression of the treadle connected to the rod I34.
  • the operator depresses the treadle connected to the rod I84 at the appropriate time, thus projecting the tack pulling tool I40 into operative position where it will engage and pull the tacks.
  • the pincer jaws open, release the shoe upper, move toward the right and again close upon the margin of the upper, seizing the latter at a new place thereon, ready to begin another leftward feeding stroke.
  • the action of the pincer upon the work is thu intermittently progressive and as the margin of the upper leaves the pincer it comes into the path of the rapidly rotating wiper 214 which lays the margin down upon the insole and, by a combined wiping action and a rapid series of pressure impulses, forces the upper into permanent adherence to the insole, it being assumed that both the upper and the insole have been previously coated with cement.
  • the insole wiper finger I80 swings forward into engagement with the insole, pressing the latter against the last, and then, while the pincer is swinging toward the left, the finger also swings toward the left and in addition moves upward toward the edge of the last, this composite movement being in an arc of a circle about the fixed axis of the sleeve I88 as a center.
  • the cam 288 causes the finger I80 to move rearward out of engagement with the insole and holds it thus retracted while the connecting rod 208 swings it back to its right hand position, simultaneously with the movement of the open pincer jaws toward their right hand position preparatory to taking a fresh grip on the upper.
  • the finger I80 can yield rearward at any time and will never bear against the work with any more force than that provided by said spring.
  • the treadle rod I34 may be depressed causing the pivot IOI to be displaced further from the axis of the shaft I08, with the result that a longer tensioning stroke is imparted to the pincer.
  • the tensioning effect is thus increased to the desired extent until a portion of the shoe is reached where less tension is required, whereupon the treadle .48 is released.
  • the lasting operation proceeds continuously regardless of these changes in the tensioning force applied to the shoe upper.
  • the plane of rotation of the wiper 214 is so inclined with respect to the edge of the last that the margin of the upper is wiped both inward and longitudinally of the last, away from the pincer in the direction in which the shoe is moving.
  • the large number of pressure and wiping impulses imparted by the projections upon the wiper cause the upper material to be distributed evenly substantially continuously and laid smoothly on the bottom face of the insole especially when working around curves, as at the toe of a shoe, where the tendency is to produce a large number of narrow pleats or folds evenly distributed along the curve.
  • a pair of power operated pincer jaws arranged t4 grip the margin of an upper upon a last and to effect feeding movement thereof, said jaws being movable in an arcuate path about an axis parallel to the last bottom and so disposed with respect to the path of feeding movement as to tension the upper over the last, and means for moving said jaws radially of their arcuate path of movement to increase the tensioning effect upon the upper.
  • a pair of power operated pincer Jaws arranged to feed the margin of an upper and to tension the upper over a last, and means for wiping the margin of the upper inward and imparting to it a rapidseries of pressure impulses to secure it to the margin of an insole upon the last adjacent to the location where the upper is tensioned.
  • lasting machine the combination of lasting instrumentalities movable in a predetermined path, a tack pulling tool normally movable in a path remote from a shoe which is in operative relation to the lasting instrumentalities, and means for projecting the tack pulling tool into operative relation. to said shoe.
  • a lasting machine the combination of a continually oscillating lasting pincer, a continually oscillating tack puller, and means for shifting the tack puller into and out of operative relation to a shoe which is in position to be operated upon by the lasting pincer.
  • a lasting pincer upon said table a tack pulling tool upon said table, and means ior shifting the position of the tool relatively to the table while the table is oscillating.
  • a power operated pincer arranged to grip the margin of an upper upon a last and to effect an intermittent feeding movement thereof, a shoe bottom rest movable between effective and ineffective positions, and means for moving said rest into effective position during each pause in the intermittent feeding movement and retracting it to ineffective position during each increment of said movement.
  • a power operated, oscillating pincer means for opening and closing the jaws of the pincer in timed relation to its oscillation, a shoe bottom rest reciprocable between eflective shoe gaging and ineffective positions, and means for reciprocating said rest in such timed relation to the opening and closing of the pincer jaws that the rest is in shoe gaging position when the jaws are open and in ineflective position when they are closed.
  • a reciprocable pincer movable in a direction to tension the upper 01 a shoe over a last, a shoe bottom rest reciprocable between efiective shoe gaging and ineffective positions, and means for reciprocating said rest in such timed relation to the reciprocation of the pincer that the rest is retracted to ineflective position during the upper tensioning stroke oi! the pincer.
  • the combination oi means tor laying successive portions of the margin 01' an upper inwardly over an insole on a last, and means, operating in advance of said laying means, tor pressing the marginal portion 01' the insole against the bottom of the last.
  • the combination or means for laying successive portions of the margin of an upper inwardly over an insole on a last and means, operating in advance of said laying means, for wiping and smoothing out the marginal portion of the insole against the bottom oi the last.
  • a lasting machine the combination of a power operated pincer arranged to grip the margin of an upper upon a last and effect feeding movement thereof, and a power op'erated wiper arranged yieldingly to engage and wipe the marginal portion 01 an insole upon the last smoothly outward toward the edge or the last.

Description

Aug. 24, 1943. c. w. BAKER MACHINE FOR SHAPING UPPERS OVER LASTS Filed May 25, 1942 5 Sheets-Sheet 1 v //v VE/V TU/L Aug. 24, 1943. c. w. BAKER 2,327,392
MACHINE FOR SHAPING UPiERS OVER LASTS Filed May 25, 1942 5 Sheets-Sheet 2 I 40 g I Fig. 2..
//vv/vm/ COMM; u, vL -M Aug. 24, 1943. c. w. BAKER MACHINE FOR SHAPING UPPERS OVER LASTS 5 Sheets-Sheet, 3
Filed May 25, 1942 Aug. 24, 1943. c. w. BAKER 2,327,392
MACHINE FOR SHAPING UPPERS OVER LASTS Filed May 25, 1942 5 Sheets-Sheet 4 Au 24, 1943. c. w. BAKER 2,327,392
MACHINE FOR SHAPING UPPERS OVER LASTS Filed May 25, 1942 5 Sheets-Sheet 5 Patented Aug. 24, 1943 MACHINE FOR SHAPHNG UPPERS OVER LASTS Corwin W. Baker, Stoneharn, Mass assignor to United Shoe Machinery Corporation, Flemington, N. 3., a corporation of New Jersey Application May 25, 1942, Serial No. Mans 19 Glaims.
This invention relates to machines for shaping shoe uppers over lasts and is herein illustrated as embodied in a lasting machine in the use of which successive portions of an upper are progressively tensioned and worked into lasted position on the insole of a shoe.
The object of the invention is to provide an improved machine, simple in construction and operation, for lasting in a quick and effective manner shoes in Which cement is used to secure the overlasted margin of the upper to the insole.
With this object in view, a feature of the invention resides in the combination with means operating intermittently to grip and pull successive portions of an upper over a last, of means acting substantially continuously on the previously cemented margin of the upper, adjacent to the pulling means, to wipe the margin inward over an insole on the last while imparting to it a plurality of pressure impulses, heightwise of the last. In the illustrated machine, the margin laying means consists of a continuously driven rotary wiper having upon its periphery spaced projections so that it not only wipes the margin of the upper overthe insole but continuously pounds or subjects said margin to a rapid series of pressure impulses. This wiper mechanism, as shown, is similar to that disclosed in my prior application for Letters Patent of the United States, Serial No. 403,737, filed July 23, 1941.
According to the present invention, however, the upper gripping and tensioning means consists of a pincer which operates intermittently to grip and pull the upper, in contrast to the gripper rolls in the machine disclosed in my said prior application, which rolls operate continuously.
Invention is also to be recognized in a mounting for such a pincer constructed and arranged to permit the pincer jaws to oscillate about an axis parallel to the bottom face of the insole of a shoe being operated upon and transverse to the shoe, to cause the upper to be simultaneously tensioned heightwise of the last and the shoe to be fed progressively through the machine.
A further feature of the invention resides in such an oscillatable pincer constructed and arranged also to permit movement of its jaws radially of their normal arcuate path of movement as may be needed to increase the tensioning effect upon the shoe upper. In the machine shown in the accompanying drawings, manual means is provided for varying the extent of the radial movement of the jaws so that the tensioning efiect of the pincer upon the shoe upper may be varied at will by the operator, even while the machine is in operation.
In another aspect, the invention also provides, in combination with the lasting instrumentalities of a lasting machine, a tack pulling tool and means for operating the lasting instrumentalities and the tack pulling tool simultaneously. As disclosed herein, the machine is provided with an oscillatory table upon which both the lasting pincer and the, tack pulling tool are carried and with which they oscillate in different arcuate paths, the tack puller normally moving in a path remote from the shoe and being ineffective but being arranged to be projected at the will of the operator into operative relation to the shoe.
According to another feature of the invention, a shoe bottom rest, movable between effective and ineffective positions, is provided, together with means for moving it to effective shoe gaging position during each pause in the intermittent feeding movement of the shoe and retracting it to ineffective position during each increment of said movement.
A still further feature of the invention resides in the provision of means for pressing the mar ginal portion of an insole against the bottom of the last and wiping it out smoothly toward the edge of the last. This wiping means preferably operates in advance of the rotary Wiper which lays the margin of the upper inward over the insole and greatly facilitates the production of a smooth shoe bottom when thin or soft insoles are used, they frequently having a tendency to become bunched up at spots, preventing the accomplishment of a perfect lasting operation.
The above and other features of the invention and benefits to be derived from its use will appear more clearly in the following detailed description of one embodiment thereof when read in connection with the accompanying drawings, in which Fig. 1 is a view of the machine in front elevation;
Fig. 2 is a plan view;
Fig. 3 is a view in elevation with portions broken away, looking from the right-hand side of the machine;
Fig. 4 is a perspective view of the pincer operating mechanism;
Fig. 5 is a plan view showing a detail of the pincer;
Fig. 6 is a plan view of a detail of the mechanism for opening and closing the pincer jaws;
Figs. 7 and 8 are perspective views of mechanisms for operating the insole smoothing finger and the shoe bottom rest; and
Figs. 9, 10, 11 and 12 show views of details of the mechanism shown in Fig. '1.
Referring now to the drawings, I indicates a supporting column upon which is mounted a frame or casing I2 containing the operating mechanism of the machine. Power is supplied to the machine by a driving belt I4 which engages a pulley I6 upon a main shaft I8 running in bearings 20 formed in the stationary frame I2.
A gear 22 (Fig. 1) afflxed to the shaft I8 meshes with, and drives, a similar gear 24 secured to a countershaft 26 upon which is an eccentric 20 (Figs. 3 and 4). The eccentric 28 is connected by an eccentric rod 30 through a ball and socket joint 32 to the outer end of a swinging arm 34 having a split hub 36 which is secured by a clamping bolt 38 upon the lower end of an upright sleeve 40.
Mounted upon the upper end of the sleeve 40 is a table 42 which supports and imparts swinging movement to a pincer 44 and a tack pulling tool 46 when the sleeve 40 is oscillated about its vertical axis. The pincer comprises a stationary upper Jaw 48 and a movable lower jaw 50'. The lower Jaw 60 is mounted for pivotal movement about a horizontal stud 52 (Fig. and the rear end of the jaw member carries a, laterally projecting pin 54 to which is pivotally connected a vertical rod 56 passing downward through the sleeve 40. The lower end of the rod 56 rests in a socket member 58 (Figs. 1, 3 and 6) adjustably threaded through an ear 60 which is a part of an arm 62. The arm 62 is bifurcated and mounted to swing vertically about a horizontal pivot pin 64 mounted in a stationary bracket 66 which is bolted down to the machine frame.
A stiff compression spring 68 surrounds the rod 56 and bears upon a washer I0 supported by a nut I2 threaded upon the lower end of the rod. By adjustment of this nut the tension of the spring can be varied. The spring 68 tends to close the pincer 44 and to hold the lower end of the rod 56 down in engagement with the socket member 58.
In order to provide for opening the pincer when it is desired to insert therein the margin of a shoe upper, as the shoe is presented in the position shown in Figs. 2 and 3 with the bottom face of the insole parallel to the axis of the sleeve 40 and the shoe disposed transversely to said axis, there is provided a rod 74 the, lower end of which passes loosely through a hole in an ear it formed on the arm 62 and has a nut i8 screwed upon its lower end. The upper end of the rod I4 is pivoted at 80 to a rocker arm 82 mounted upon a rockshaft 84 to which is secured a lever 86 having its outer end connected by a treadle rod 08 to a treadle (not shown). When the treadle rod 88 is lowered by depressing the treadle the rod I4 will be raised and the arm 62 will be lifted, thereby lifting the pincer rod 06 and opening the pincer against the tension of the spring 68.
In order to open and close the pincer intermittently during the operation ofthe machine, the front end of a lever 00, pivoted upon the pin 64 between the arms of the bifurcated portion of the arm 62, is arranged to engage the under side of the said arm and the rear end of the lever carries a cam roll 02 (Figs. 3 and 6) which engages a cam 94 upon the shaft 26, the roll being held against the cam by a spring pressed plunger 96 housed in the lever 90 and bearing upon the base of the bracket 86. The cam 0415 so timed relatively to the eccentric 28 that it will cause the pincer to be opened at the end of its horizontal swinging movement in one direction and held open while it is returned to its starting position, whereupon it will be closed to secure a new grip on the margin of the shoe upper, it being understood that the horizontal oscillatory movement of the pincer in an arcuate path is for the purpose of feeding the shoe progressively past the tools which operate upon it as well as to tension the upper.
For the purpose of further tensioning the shoe upper about the last the pincer is carried by a reciprocatory slide 98 connected by a link I00 to a pivot IOI on a block I02 which is slidable in an arcuate guideway I04 in a rocker member I06 aflixed to the upper end of an upright rockshaft I08. Secured to the shaft I08 by a clamping bolt IIO passing through a split hub II2 (Fig. 4) is a swinging arm II4 which is connected by a link II6 to an arm II8 integral with the swinging arm 34 but extending in the opposite direcgim therefrom relative to the axis of the sleeve The reason for the slidable block I02 is to provide for adjustment of the eccentricity of the pivot IOI relative to the axis of the shaft I08 and to this end the block is connected by a link I20 to a lever I22 movable about a stationary pivot I24 and connected, in turn, by a link I26 to an upright arm I20 of a bell crank lever movable about a stationary horizontal pivot pin I80. The second arm I32 of the bell crank lever is connected by a treadle rod I34 to a treadle (not shown) by the actuation of which the block I02 may be 50 adjusted lengthwise in the guide I04 that the pivot IOI is either concentric with the axis of the shaft or eccentric thereto by any desired amount. The shifting of the pivot IOI may be effected at any time and to any desired extent, regardless of whether the machine is running or not, and when the pivot is offset from the axis of the shaft I08 the rocking movement of the said shaft, derived from the arm H8 and transmitted by the link II6, will cause the slide 98 and the pincer carried thereby to be reciprocated in proper time relation to the movement of the other elements of the mechanism, to exert additional pull or tension upon the shoe upper in the grip of the pincer during each increment of the work feeding movement, the length of the pincer stroke being determined by the distance iaaggween the pivot WI and the axis of the shaft In addition to the slide 98 there is mounted upon the table 42 a box-lik guide member I38 in which is a longitudinally movable slide bar H8. The tack pulling tool 46 is secured to the front end portion of the bar I38 by a screw I40 and a compression spring I42 housed in a bore in the bar tends at all times to move the bar rearward to the retracted position shown in Figs. 2 and 4 in which position the tack puller is ineffective. A roll I43 upon the rear end portion of the bar is arranged to be engaged by a cam face I44 formed upon an arm I46, one end of which is movable about a stationary pivot I48 and the other end of which is connected by a link I60 to an arm I52 of a bell crank lever movable about a stationary pivot I54 and having its other arm I56 connected by a link I58to an arm N0 of another bell crank lever pivotally mounted upon the pin I30. The second arm I62 of the last-named bell crank lever is connected by a,
treadle rod i to a third treadle (not shown) by actuation of which, through the connections just described, the arm M6 may be swung forward about the pivot lit to cause the cam face Mi t to enga e the roll lit and project the bar tilt and the tack pulling tool tit forward to operative position where it can operate to pull out any pulling over tacks that may project from the bottom oi the shoe.
it bottom rest Iii-lb by which the position oi shoe relatively to the pincer it is gaged is mounted upon the front end of a slide Elba, guided tor rectilinear movement fore and aft of the machine in a stationary box-like guide ilii (Figs. 1 and 8) bolted down upon the machine frame by bolts ilft. ihe rearend of the glide tilt is connected by a link lid to the upright arm ilii of a bell crank lever which. is movable about horizontal pivot il't carried by a stationary bracket itilll which is also bolted to the machine frame. At the rear end or the second arm i832 oi the bell crank lever is a cam roll id l which is held in engagement with the cam so by a spring iliii (Fig. 3) enclosed in a stationary housing its and bearing upon a boss tilt formed upon the arm Hill.
The stroke of the bottom rest ltd is short and the purpose in keeping it continually recip rocating is to facilitate the movement of the shoe as it progresses during the lasting operation. The timing is such that the bottom rest will be projected forward to effective position in contact with the shoe bottom in the period when the pincer jaws are open, between successive movements of the shoe, and will be retracted a short distance to ineilective position while the jaws are closed and the shoe is being fed along.
When thin and soft insoles are used they freauently have a tendency to become bunched up at spots, preventing the accomplishment of a perfect lasting operation, and for the purpose of overcoming this trouble I have provided a wiper finger use (Figs. 1 and 7) designed to engage and wipe the marginal portion of the in" sole, pressing it against the bottom of the last and smoothing it out toward the edge thereof. This wiper finger is mounted in a rocker member II 92 which is journaled upon a pivot shaft i it secured in a cradle Idi'i.
The cradle tilt is journaled on the forward portion of a hollow sleeve its so as to be capable of oscillatory movement relatively to the sleeve, about the axis of the sleeve. An arm 2% extending rearward from the rocker member W2, and integral therewith, contains a compression spring 282 the lower end of which bears upon the cradle I96 and tends at all times to swing the rocker member relatively to the cradle in a counterclockwise direction, as viewed from the right hand side in Figs. 1 and '7. The sleeve I98 is journaled for oscillatory movement in a bearing in the frame i2 and has amxed to its rear end portion a rocker arm 204 which is pivotally connected by a ball and socket Joint 2% I a. crank member 2 from the rear face 01' which projects 9. lug 2IB. Figs. 9 and 11. This lug is disposed in a radial slot 2m formed in the cred die iiit, the slot being substantially wider than the lug and the lug being normally held against one side oi the slot by a compression spring are contained in a housing ltd forming part oi the cradle. Thus when the sleeve lid is oscillated it will, through the crank member tit and the lug dill, cause the cradle let to oscillate with the sleeve, about the axis of the latter. By reason of the yielding connection between the crank member 2% and the crank its, afforded by the lug tit and the spring 2%. the oscillation of the cradle may be stopped at any time by swinging it a short distance in a clockwise direction as seen from the front of the machine. For this purpose the cradle is provided with a downwardly ex= tending abutment 22d arranged to be engaged by a bar 226 which is pivotally connected at to an arm 2% extending downward from the l ver Elli. When the treadle rod 88 is depressed; therefore, not only will the pincer it be opened but oscillation of the cradle tilt and th wiper finger ltd will also be stopped. I
Extending through the bore of the sleeve 095i is a connecting rod 232 the front end of which has a socket surrounding the ball end 236 of a pin 2% which passes through a supporting. arm
35? journaled upon the pivot shaft ld l. A sleeve 2% surrounding the pin is forced against the ide of the arm 238 by a nut till threaded upon the end of the pin. The sleeve t lt is arranged to be engaged by the hooked end'Z l i of an arm 2%, which is integral with the rocker member tar, as best shown in Figs. 1, 7 and 12.
The structure just described permits the rocker member W2 and the finger tilt to be oscillated about the axis of the shaft i941 by reciprocation of the connecting rod 232, provision for yielding when the finger Hid encounters resistance being made by the ability of the pin 236 and the sleeve Zliii to leave the hook wi l, these parts being normally held in contact by the spring 202,
The rear end of the connecting rod 232 is pivotally connected by a ball and socket joint to an upright arm 2% (Fig. 7) pivoted on a pin 2513 supported in a stationary bracket 2E2 bolted to the machine frame. Integral with the arm 2 th is a horizontal arm 2% carrying a cam roll 2% which engages a cam 253 afilxecl to the left hand end portion of the countershaft 26 (see Figs. 1, 2 and 7). A compression spring 260, Fig. 3, contained in a stationary housing 262 bears on the enlarged rear end portion 264 of the cam roll arm 25%, holding the cam roll in engagement with the cam.
The cam 258 is so timed relatively to the eccentric 28 that the wiper finger I90 will be simultaneously rocked, about the pivot shaft I94, into engagement with the insole of the shoe and, about the axis of the sleevel98, toward the edge of the last, while the pincer M is moving toward the left, as viewed in Fig. 1, during which time the pincer is pulling the upper over the last and feeding the shoe leftward. The finger I90 thus wipes out the marginal portion of the insole smoothly against the bottom of the last in ad- Vance of the engagement of the margin of the shoe upper by the upper margin laying means 214 presently to be described.
An edge gage roll 266 for determining the position of the shoe vertically in relation to the pincer 44 is carried by a rod 268 supported by a bar 210 mounted in a bracket 212 bolted to the machine frame.
A rotary wiper 214, similar in structure and operation to that disclosed in my aforesaid prior application for Letters Patent of the United States Serial No. 403,737, filed July 23, 1941, is rotatively mounted upon a stud 216 secured in an angle plate 218 adjustable along an arcuate slot 280111 a stationary upright bracket 282. A pulley 284 fast to the rotary wiper 214 receives power from a belt 286 driven by a pulley 288 affixed to a countershaft 280 which is continuously driven from the shaft I8 through a belt 282. By adjustment of the angle plate 218 along the arcuate slot 280 the plane of the wiper can be adjusted to any desired inclination to the vertical and slots 284 in the base of the bracket 282, through which pass the bolts which secure the bracket to the machine frame, permit adjustment of the entire wiper supporting structure horizontally, to vary the distance between the wiper and the pincer 44.
In the normal operation of the machine the shaft I8 is driven continuously. The treadle rod 88 is depressed to open the pincer jaws and stop the wiping action of the insole wiper finger I80, permitting the marginal portion of the shoe upper to be inserted between the pincer jaws with the shoe positioned against the edge gage 268 and in the range of operation of the bottom rest finger I66. The treadle to which the rod 88 is connected is then released, whereupon the pincer jaws 48, 50 seize the margin of the shoe upper and simultaneously feed the shoe in the direction indicated by the arrow upon the shoe in Fig. 2 and tension the upper over the last with more or less force depending upon the position of the slidable block I02, which may be shifted at will during the operation of the machine bygreater or less depression of the treadle connected to the rod I34.-
If there are any projecting pulling over tacks which need to be pulled, the operator depresses the treadle connected to the rod I84 at the appropriate time, thus projecting the tack pulling tool I40 into operative position where it will engage and pull the tacks.
At the end of the feeding stroke of the pincer 44, toward the left hand side of the machine, the pincer jaws open, release the shoe upper, move toward the right and again close upon the margin of the upper, seizing the latter at a new place thereon, ready to begin another leftward feeding stroke. The action of the pincer upon the work is thu intermittently progressive and as the margin of the upper leaves the pincer it comes into the path of the rapidly rotating wiper 214 which lays the margin down upon the insole and, by a combined wiping action and a rapid series of pressure impulses, forces the upper into permanent adherence to the insole, it being assumed that both the upper and the insole have been previously coated with cement.
During each step of the feeding operation, that is during each leftward stroke of the pincer, the insole wiper finger I80 swings forward into engagement with the insole, pressing the latter against the last, and then, while the pincer is swinging toward the left, the finger also swings toward the left and in addition moves upward toward the edge of the last, this composite movement being in an arc of a circle about the fixed axis of the sleeve I88 as a center. At about the time when the pincer jaws open, the cam 288 causes the finger I80 to move rearward out of engagement with the insole and holds it thus retracted while the connecting rod 208 swings it back to its right hand position, simultaneously with the movement of the open pincer jaws toward their right hand position preparatory to taking a fresh grip on the upper. By reason of the spring 202 the finger I80 can yield rearward at any time and will never bear against the work with any more force than that provided by said spring.
As the operation proceeds to a portion of the shoe where a stronger pull upon the upper is needed to tension it properly over the last the treadle rod I34 may be depressed causing the pivot IOI to be displaced further from the axis of the shaft I08, with the result that a longer tensioning stroke is imparted to the pincer. The tensioning effect is thus increased to the desired extent until a portion of the shoe is reached where less tension is required, whereupon the treadle .48 is released. The lasting operation proceeds continuously regardless of these changes in the tensioning force applied to the shoe upper.
As is apparent from Figs. 1, 2 and 3, the plane of rotation of the wiper 214 is so inclined with respect to the edge of the last that the margin of the upper is wiped both inward and longitudinally of the last, away from the pincer in the direction in which the shoe is moving. The large number of pressure and wiping impulses imparted by the projections upon the wiper cause the upper material to be distributed evenly substantially continuously and laid smoothly on the bottom face of the insole especially when working around curves, as at the toe of a shoe, where the tendency is to produce a large number of narrow pleats or folds evenly distributed along the curve.
Having described the invention, what is claimed as new and desired to be secured by Letters Patent of the United States is 1. In a machine for shaping uppers over lasts, the combination of means operating intermittently to grip and pull successive portions of an upper over a last, and means arranged to act substantially continuously on themargin of the upper in a location adjacent to said first-named means to wipe the margin inward over an insole on the last while imparting to it a plurality of pressure impulses heightwise of the last during each operation of the gripping means.
2. In a machine for shaping uppers over lasts, the combination with means for laying the marginal portion of an upper inward over an insole on a last, of a pair of power operated pincer jaws arranged to grip the marginal portion of the upper and to feed the shoe past the overlaying means, said jaws being oscillatable about an axis parallel to the bottom face of the insole and transverse to the shoe, to cause the upper to be tensioned heightwise of the last during the feeding operation.
3. In a machine for shaping uppers over lasts a pair of power operated pincer jaws arranged t4: grip the margin of an upper upon a last and to effect feeding movement thereof, said jaws being movable in an arcuate path about an axis parallel to the last bottom and so disposed with respect to the path of feeding movement as to tension the upper over the last, and means for moving said jaws radially of their arcuate path of movement to increase the tensioning effect upon the upper.
4. In a machine for shaping uppers over lasts,
to grip the marginal portion of an upper mount-' -a rocker member having a shiftable pivot thereon, a connection between said pivot and said silde, and means for shifting said pivot relatively to the axis 01 the rocker member at the will of the operator.
6. In a machine for shaping uppers over lasts, a pair of power operated pincer Jaws arranged to feed the margin of an upper and to tension the upper over a last, and means for wiping the margin of the upper inward and imparting to it a rapidseries of pressure impulses to secure it to the margin of an insole upon the last adjacent to the location where the upper is tensioned.
7. In a lasting machine, the combination of lasting instrumentalities, a movable tack pulling tool, and means for operating said instrumentalities and tool simultaneously.
8. Inc, lasting machine, the combination of lasting instrumentalities movable in a predetermined path, a tack pulling tool normally movable in a path remote from a shoe which is in operative relation to the lasting instrumentalities, and means for projecting the tack pulling tool into operative relation. to said shoe.
9. In a lasting machine, the combination of lasting instrumentalities movable in an arcuate path, a tack pulling tool movable in a diflerent arcuate path, means for moving said instrumentalities simultaneously in their respective paths, and means, operative during the movement of the tool, for shifting its path oi! movement.
10. In a lasting machine, the combination of a continually oscillating lasting pincer, a continually oscillating tack puller, and means for shifting the tack puller into and out of operative relation to a shoe which is in position to be operated upon by the lasting pincer.
11. In a lasting machine, an oscillatory table,
a lasting pincer upon said table, a tack pulling tool upon said table, and means ior shifting the position of the tool relatively to the table while the table is oscillating.
12. In a lasting machine, a power operated pincer arranged to grip the margin of an upper upon a last and to effect an intermittent feeding movement thereof, a shoe bottom rest movable between effective and ineffective positions, and means for moving said rest into effective position during each pause in the intermittent feeding movement and retracting it to ineffective position during each increment of said movement.
13. In a lasting machine, a power operated, oscillating pincer, means for opening and closing the jaws of the pincer in timed relation to its oscillation, a shoe bottom rest reciprocable between eflective shoe gaging and ineffective positions, and means for reciprocating said rest in such timed relation to the opening and closing of the pincer jaws that the rest is in shoe gaging position when the jaws are open and in ineflective position when they are closed.
14. In a lasting machine, a reciprocable pincer movable in a direction to tension the upper 01 a shoe over a last, a shoe bottom rest reciprocable between efiective shoe gaging and ineffective positions, and means for reciprocating said rest in such timed relation to the reciprocation of the pincer that the rest is retracted to ineflective position during the upper tensioning stroke oi! the pincer.
15. In a lasting machine, the combination oi means tor laying successive portions of the margin 01' an upper inwardly over an insole on a last, and means, operating in advance of said laying means, tor pressing the marginal portion 01' the insole against the bottom of the last.
16. In a lasting machine, the combination or means for laying successive portions of the margin of an upper inwardly over an insole on a last, and means, operating in advance of said laying means, for wiping and smoothing out the marginal portion of the insole against the bottom oi the last.
17. In a lasting machine, the combination of means for laying successive portions of the margin oi. an upper inwardly over an insole on a last, and wiping means, operating in advance of said laying means and operating outwardly toward the edge of the last, for smoothing out the marginal portion of the insole against the bottom 0! the last.
18. In a lasting machine, the combination of means for gripping and pulling successive portions of an upper over a last, of means for simultaneously wiping the marginal portion of an insole upon the last smoothly outward toward the edge of the last.
19. In a lasting machine, the combination of a power operated pincer arranged to grip the margin of an upper upon a last and effect feeding movement thereof, and a power op'erated wiper arranged yieldingly to engage and wipe the marginal portion 01 an insole upon the last smoothly outward toward the edge or the last.
CORWIN' W. BAKER.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2429333A (en) * 1945-11-19 1947-10-21 Compo Shoe Machinery Corp Lasting machine
US2663035A (en) * 1949-12-31 1953-12-22 United Shoe Machinery Corp Lasting machine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2429333A (en) * 1945-11-19 1947-10-21 Compo Shoe Machinery Corp Lasting machine
US2663035A (en) * 1949-12-31 1953-12-22 United Shoe Machinery Corp Lasting machine

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