US2120781A - Side-lasting machine - Google Patents

Description

June 14, 1938. w; F. GREEN 2,120,731

SIDE LASTING MACHINE Filed Sept. 9, 1935 2 Shets-Sheet 1 lwva/vroz N: I W/ ///'am 6 6 TOE/V5 Y Juhg14,1938. W.F. GREEN 2,120,781 SIDE LASTING MACHINE Filed Sept. 9, 1935 2 Sheets-Sheet 2 I/v VENTOE 4 Wf/h'am Ff Green.

Patented June 14, 1938 UNITED STATES PATET OFFECE SIDE-LASTING MACHINE poration of Missouri Application September 9, 1935, Serial No. 39,695

Claims.

This invention relates generally to shoe-manufacturing machinery and, more particularly, to a certain new and useful improvement in shoemachinery of the type commonly known as side- 5 lasting machines.

Side-lasting, as is well known, comprises that step in the bottoming of shoes especially of the glued or cemented type, wherein the upper at its lower margin is concurrently pulled over and temporarily tacked or nailed to the inner sole for retaining or securing the upper in its pulled or stretched condition during the setting or hardening of the glue, cement, or other adhesive.

For perfection in side-lasting and in the resuiting fit of the shoe, it is essential, as I have discovered, that the pulling, on the respective sides of the shoe, be started adjacent the toe and continued progressively step by-step toward the heel, with the direction of the pull at all 0 times diagonally from the heel toward the toe, and that the pull on the upper on both sides of the shoe be substantially uniform and equal.

Now, in side-lasting machines for the production of cemented shoes as today generally constructed, so far as I am aware, the pulling over device or lasting gripper is so located for operation adjacent the nailing device that two operators are required to complete the lasting of a single shoe, one operator lasting one side of the shoe and the operation of lasting being then interrupted for delivery of the shoe to the second operator for lasting of the other side thereof. No two operators working exactly or precisely alike, it results that the pull on the upper is non-uniform or unequal, the fit and appearance of the finished shoe being consequently impaired and the cost and time of production being to such extent increased.

My present invention has hence for its primary object the provision in a side-lasting machine of a pulling over device which is selectively and at the will of the operator shiftable for operation on either side of the nailing device, whereby the shoe may with ease, convenience, and facility 4 be completely lasted by the same operator, the

lasting operation continuing to completion without interruption and a uniformly lasted and substantially perfectly fitting shoe resulting with a corresponding reduction in time and cost of pro- 50 duction.

And with the above and other objects in view, my invention resides in the novel features of form, construction, arrangement, and combination of parts all as presently described and pointed 55 out in the claims.

In the accompanying drawings (two sheets) Figure l is a broken or iragmental view of a side-lasting machine embodying a shiftable pulling over device of my invention, merely such parts of the machine being shown as are op- 5 eratively associated therewith and other parts of the machine being omitted;

Figure 2 is a diagrammatic fragmentary perspective view of the pulling over device as disposed on one side of the nailing device; 10

Figure 3 is a view, similar to Figure 2, showing the pulling over device disposed on the other side of the nailing device;

Figure 4 is a fragmentary perspective view of a shoe being worked on one of its sides by the i5 side-lasting machine, merely fragmentary rep resentation of associated parts of the machine being shown and other parts omitted;

Figure 5 is a fragmentary perspective view, similar to Figure 4, showing the shoe being 20 worked on its other side; and

Figure 6 is a fragmentary plan view taken approximately along the line 6ii, Figure 1.

Referring now more in detail and by reference characters to the drawings, which illustrate a 25 preferred embodiment of my invention in connection with a standard or commercial type of side-lasting machine here only fragmentally shown to such extent as is necessary to an un derstanding of the present invention, and of '30 such machine A is the so-called nailing device, which, in turn, includes a stationary lifter-foot or rest I over which, in the operation of the machine, the marginal portion 2 of the upper 3 is shifted for lifting the same from the inner sole 35 4, and 5 is a reciprocatory presser-foot, which during the nailing operation, firmly folds the upper marginal-portion 2 over the marginal portion of the sole t, as will be well understood.

Similarly, ii is the naildriving plunger, and 40 I the nails ortacks which are driven through the upper-margin 2 into the sole 4.

The pulling-over means or lasting gripper B includes a bracket or arm M in fixed position in the machine, and mounted at an end in the bracket M by means of a ball and socket joint, such as that shown at 6 3, for both oscillatory and axially rotative movement is a sleeve ll. Fixed, in turn, on the lower end of the sleeve II is a pincer'head 8 equipped preferably with a stationary or fixed jaw 9.

Pivoted on the head 8 for co-operation with the jaw 9, is a movable jaw it adapted for actuation by means of a shaft or rod l2 disposed within the head a and sleeve I! for lengthwise reciprocation under the influence in one direction by a rocker-arm 53 and yieldingly in the other direction by a spring 56 coiled on the sleeve intermediate an abutment or guide l5 on a presently described member C of the machine and a pin 65 fixed to the shaft I2 and working in a slot longitudinally provided in the sleeve H, all as best seen in Figure 1, the uppermargin 2 of the shoe being worked being slipped over the jaw 9 when the upper-margin is lifted for such purpose by the foot I and the jaw H), during the operation of the machine, being advanced toward and retracted from the jaw 5 for successively gripping and then releasing the so lifted upper-margin 2.

C designates a carriage through whose boss or abutment E5 the sleeve II is guidingly passed, and whose body-portion l6 has engagement for sliding movement in bearings it on the respective legs of a reciprocatory bifurcated member or yoke l9. During the operation of the machine, it may be stated that the yoke i9 is, by suitable mechanism, not here shown, reciprocatorily shifted at suitable moments for advancing the pulling over device or lasting gripper B for gripping the upper-margin 2, and then biasing the device B in the opposite direction for pulling or stretching the gripped upper-margin 2 over and upon the inner-sole 4, in the manner and for the purpose well known to those skilled in the art.

Having thus briefly described such several parts of the side lasting machine which are operatively associated with my present. invention, I will now proceed to a more particular description of my present invention.

It may first be stated that the yoke I5 is symmetrically disposed with respect to the nailing device A, and that the carriage C has its bodyportion I5 extended at its opposite ends, as at IT, IT, for shiftable movement transversely of the yoke IQ for the purpose of swingably disposing the pulling over device B to one side or the other of the nailing device A.

A plate 20 is mounted on and between the bearings l8 and at its respective opposite ends is equipped with upstanding horns or stops 2| adapted for impingement by the respective opposite, ends or shoes H of the carriage C for strictly limiting the transverse motion of the carriage C for disposing the pulling over device B, when in the respective opposite ends of its stroke, in predetermined relationship with respect to, and on corresponding opposite sides of, the nailing device A.

22 designates a goose-necked shaped rod or shifter-bar provided at one end with an eye 23, through which and into the guide or boss l5 of carriage C is passed a cap-screw 23 for pivotally mounting the bar 22 on the carriage C.

At its free end, the bar 22 is slidably and loosely embraced by an eye 24 on the one or forward end of an arm 25, which extends rearwardly in the machine, the eye 24 being engaged between the opposing ends of a pair of coil or buifer springs 25, 26', adjustably positioned on the bar 22 by respective sets of jam-nuts 27, as best seen in Figure 1.

At its other or rear end, the arm 25 passes into an aperture 28 provided in the free end of a crank 29, to which latter, the arm 25 is suitably connected, as by a pin 30, the crank 29 being, in turn, mounted, on a shaft 3| suitably disposed vertically for rotation in the machine.

A second crank 32, also fixed at an end on the shaft 3|, is pivotally connected at its free end,

to one extremity of a link 33, whose other end is shaped to form a head 34 provided with a longitudinal slot 35 through which projects vertical cam-shaft 35 likewise suitably mounted for rotation in the machine.

The head 34 is equipped with a pair of spaced follower-rollers 31, which have rolling contact with the respective diametrically opposite peripheral faces of a three lobe cam 38 mounted on the shaft 36, each lobe a of the cam 38 being diametrically opposed by a valley b, whereby, on partial or step-by-step one-sixth rotation of the cam 38, the carriage C is caused to take its respective oppositely shifted positions relatively to the yoke l9.

Mounted also on the shaft 36, is a ratchet or toothed wheel 39- having preferably six equally spaced teeth, as best seen in Figure 6. On diametrically opposite sides of the ratchet 39, are disposed respective pawls 40, 4|, and connecting the pawls 4|], 4| for biasing the same on the periphery of the ratchet 39, is a spring 42.

The pawl 40 is pivoted, as at 43, to a suitable portioncof the frame 44 of the machine. The pawl 4| is pivoted, as at 45, to the upper leg of a C-shaped yoke 46, best seen in Figure 1, which embraces abracket 41 projecting from the frameportion 44 and serving as a bearing for the shaft 36. At its lower leg, the yoke 46 is rigidly secured to a quill or sleeve 48 journaled on that portion of the shaft 36 which depends below the bearing 41.

The sleeve 48 is provided with a longitudinal slot 49, in which is engaged or works a pin 50 laterally projecting from a standard 5| upstanding from a bell crank 52 pivotally mounted on the shaft 36 for motion in a horizontal plane.

One arm of the bell-crank 52 is equipped with a tensional member in the form of a spring 53, which bears against a frame-portion 54 for biasing the crank 52 for normally drawing the pawl 4| backwardly over the teeth of the'ratchet-wheel- To the other arm of the bell-crank 52, is pivotally connected one end of a link 55, which extends toward the front of the machine and at its other end is provided with a knee-cup 56, as best seen in Figure 1. Intermediate its ends, the link 55 is provided with a longitudinal slot 51, which works over a pin 58 depending from a machine-member 59, whereby, when the operator of the machine presents his knee, as 60, into the cup 56 and presses thereagainst, the link 55 is guided for longitudinal movement inwardly of the machine and rotatably actuates the bell-crank 52 against the bias of the spring 53. Such rotative movement of the crank 52 is, by means of the pin 5|) on the standard 5|, communicated to the sleeve 48 and thus to the yoke 46 for moving the pawl 4| against a tooth on the ratchet-wheel 39.

Normally, the relationship between the pawls 40, 4|, and the ratchet 39 is such that the pawl 4i) is engaged with a tooth c of the ratchet 39, while the pawl 4| is riding on the periphery of a diametrically opposite tooth d.

It will be observed that the movement of the sleeve 48 is effected bythe motion of the knee transmitted to it through the link 55 and the bellcrank 52. In the case of machines designed for heavy work, it may be desirable to actuate the three lobed cam38 by power driven means. This may be accomplished, as shown in Figure 6, by providing a plunger 6| which could be reciprocally mounted in a slide 52. The plunger 6| is con,-

nected by a conventional train of mechanism (not shown) to any suitable source of reciprocating power in the lasting machine. Lasting machines generally include a number of direct power driven reciprocating parts of conventional design which may be utilized as a source of reciprocating power for the plunger 6| in a conventional manner; therefore this is not shown. The slide 62 is substantially wider than the plunger 6|, which latter is spring-pressed against that wall of" the slide 62 which is adjacent to the ratchet wheel 39. The plunger BI is so arranged that it will reciprocate freely past the tooth e of the ratchet 35!, maintaining a sliding contact with the outer peripheral surface thereof, as shown in Figure 3. When the cup 56 is actuated under pressure of the operators knee, the sleeve 48 is rotatively actuated, and, in turn, the ratchet 39 is rotated under engagement of the pawl 4| with the tooth c, whereupon the ratchet tooth e will press upwardly against the plunger 6| and shift the same away from the adjacent wall of the slide 62 toward the opposite wall, thus permitting the ratchet 39 to freely rotate under the impulse of the pawl 4|. Meanwhile the plunger 6| is continuously reciprocating. and the plunger 6| returns into the slide from its most extended position, it will pass over the tooth e, and as it clears the tooth e on its reciprocation, it will be moved sidewise into position against the adjacent wall of the slide 52, so that upon its next forward movement, the leading edge of the plunger Bl will operatively engage the tooth e in a pawllike action and produce continued rotation of the ratchet 39. It will be seen that, in this modification, the ratchet 39 and its associated sleeve 48 act in cooperation with the link 55 to condition the ratchet plunger mechanism for mutual co-operation to advance the pawl and correspondingly move the threelobed cam 38 one step.

Whether the ratchet 39 is operated completely by the action of the operators knee or partly by the plunger arrangement above described, the ratchet 39 is preferably so arranged that one complete movement thereof will produce a rotation of GO-degrees in the cam 38, whereby the link is shifted for, in turn, swinging the crank 29 and thus causing the arm 25 to compress one of the springs, as 26, on the shifter-bar 22 for biasing the carriage C in a direction for causing the same to move from its previous position to its opposite position for swinging the pulling over device B from one side to the other of the nailing station A.

In use and operation, the pulling operation, as has been said, is started at the toe and progressively worked, step by step, down one side of the shoe toward the heel, the direction of the pull being diagonally from the heel toward the toe, which is efiected by the mechanism of the machine, which rotatably shifts the pulling over device B in its vertical axis, as well known to those skilled in the art.

It will be understood that, the margins of the upper 53 and sole 4 having previously had the cement or other adhesive suitably applied thereto, in so traveling down, as it may be said, a side of the shoe, the pulling over device B is, in the manner described, disposed in advance, that is to say, on the heel-ward side, of the nailing device A, in order that the successive nails 1 may be driven through the stretched or pulled upper-margin 2 and into the sole 4 as shown in Figure 4, for temporarily securing the same together in lasted relation during the setting of the cement.

When that particular side of the shoe has been pulled-over and nailed, the operator turns the shoe end forend, and, while doing so, also shifts the pulling-over device B to the opposite side of the nailing station A, for, in turn, again disposing the pu11ing-=over device B in advance, or on the heelward side, of the nailing device A for similarly lasting the other side of the shoe, as shown in Figure 5, the direction of the pull on the upper sing likewise diagonally from the heel toward the toe.

Thus, in a simple and highly facile manner, my invention provides for and enables the complete lasting of a shoe by the same operator in substantially a continuous, uninterrupted operation, resulting not only in a reduction in cost and time of production, but also in a graceful, neatly and snugly fitting, and uniformly lasted shoe.

It will. be understood that changes and modiflcations in the form, construction, arrangement,

combination of the several parts of the machine and pull-over may be made and substituted for those herein shown and described without departing from the nature and principle of my invention.

Having thus described my invention, what I claim and desire to secure by Letters Patent is,-

1. In a side-lasting machine, in combination, nailing-means, a pulling over means suspended for swinging movement, a yoke, a carriage having engagement with the pulling over means and shiftable in the yoke for swinging the pulling over means from one side to the other of the nailing-station for locating the pulling over means' for lasting on either side of the nailing means, and means for effecting shifting movement of the carriage relatively to the yoke, said means including a cam shiftable to respective operative positions and a ratchet and pawl mechanism for actuating the cam.

2. In a side-lasting machine, in combination, nailing means, a pulling over means suspended for swinging movement, a yoke, a carriage having engagement with the pulling over means and shiftable in the yoke for swinging the pulling over means from one side to the other of the nailing means for locating the pulling over means for lasting on either side of the nailing means, and means for efiecting shifting movement of the carriage relatively to the yoke, said means including a cam shiftable to respective operative positions, a ratchet and pawl for actuating the cam, mechanism for shifting the pawl for actuating the ratchet for moving the cam from one operative position to another, and a reciprocatory member in the machine for then engaging the ratchet for completing the movement of the cam to the other position.

3. In a side-lasting machine, in combination, nailing means, pulling-over means suspended for swinging movement, a yoke, a carriage having engagement with the pulling-over means and shiftable in the yoke for swinging the pulling-over means from one side to the other of the nailing means for locating the pulling-over means for lasting on either side of the nailing means, a carriage arm mounted on the carriage, a link operably connected to the arm, a rock-arm connected to the link for moving the link, the carria ge and the associated carriage arm sidewise to a selected position, a three lobed cam actuatingly connected to the rock-arm, driving means for producing stepwise rotation of the cam, and means for selectively connecting the cam to the drlvi-ng meanstolproduce'a single stepwise movement thereof-.

4. In a side-lasting machine, in combination, nailing :means, pulling-over means suspended for swinging movement, a yoke, a carriage having engagement with the pulling-over means and shiftabIe in=the yoke for swinging the pullingover means from one side to the other of the nailing means for locating the pulling-over means 101 for lasting on either side of the nailing means, a

engaging thexratchet for-completing the movement of the camrtothe'other position.

5; In a side-lasting machine, in combination, nailing means; pulling-over means suspended for swinging movement; a yoke, a carriage having' engagementwith'the pulling-over means and shiftable'in the yoke for swinging the pullingover means from one side to the other of the nailing means for locating the pulling-over means for lasting operation'on either side of the nailing means;.aniarm connected to and extending outwardly from the carriage, a link connected to the arm forv limited resilient movement whereby thecarriage: and arm-may move through short distances with respect to the link in accordance with the normal reciprocatory and vibrationary movements of the machine without affecting the carriage: position, and means for efiective carriage shifting movementof the link relative to the'yoke; said means including a cam shiftable to respective operative'positions, and a ratchet and pawl mechanism for'actuating the cam.

WILLIAM F. GREEN.

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