US2508360A - Rounding machine - Google Patents

Description

C. W. BAKER ROUNDING MACHINE May 23, 1950 Filed Dec.

6 Sheets-Sheet l 0 w? 0 f a l M. d 2 6 W fnvenzor Can Vin MBaker May 23, 1950 c. w. BAKER 2,508,360

' ROUNDING MACHINE Filed Dec. 29, 1945 e Sheets-Sheet 2 [nqen tor Com/Zn Mfiai er .May 23, 1950 c. w. BAKER 2,508,360

ROUNDING MACHINE Filgd Dec. 29, 1945 6 Sheets-Sheet 4 [wear Corwzn M Baker y 195w c. W. BAKER 2,508,360

ROUNDING MACHINE Filed Dec. 29, 1945 6 Sheets-Sheet 5 23, 195G c. w. BAKER ROUNDING MACHINE GSheets-Sheet 6 Filed Dec. 29, 1945 [22 P822 W Com/m M fiaer Patented May 23, 1950 UNITED STATES, {PATENT OFFICE Gorwin W. Baker, Stoneham, Mass, assignor to United Shjoe Machinery Corporation, Flemington, J.', "a corporation of .New Jersey" Application December 29, 19.45, Serial No. 38,285

12 Claims.

This invention relates to machines for rounding the soles of shoesto the desired peripheral contour through the action of a trimming knife. It is especially concerned with shoes of the stitch;- down type, in which the external shoe-bottom includes {not only an outsole, but also a flange of the upper-material which is stitched to the outsol'e at the crease. In shoes of the above-mentioned character, the bottom-flange subject to irregularities which interfere with the proper advance and trimming of the bottom-edge. An object of my invention is to so act 'upon these irregularities that such difficulties will be avoided. For this purpose, I combine with a rounding knife or other trimming member and a guide member which determines the relation of the work to thetrimming member, a pressure member situand at the edge of the guide member toward which the work advancesand'presenting to the upper "margin of the flange a work engaging surface inclined forwardly and inwardly; Any .projectiOnS from the margin are received by the tapered throat, formed between this inclined surface and the outsole, .and forced inwardly, so the upper -surface of the flange is correctly presented 'at'itheinner side of the guide member, to be cut by the trimming member. Preferably the pressure member rotatable, and is so arranged that its work-engaging surface t'rave ls approximately inthe direction of the advance of theworlk. 'This a fa s ine fiect up n t e flang a a s avoids .frictional drag fupon the work. By providing for "the pressure member a capacity to move transversely of the flange, interference with the guidance of the work is avoided. More specifically, theie associated with a trimming "knife, acrease-guide and work-advancing means, a rotatable spindle contacting the flange of the shoe-bottom at the edge of the guide toward which the work advances and displaceable longitudinally of its axis by the shoe. As herein disclosed, the \flange engajging portion of the spindle is conical. The supporting means,

in which the spindle is rotatable, is best so fir- .ranged fthatgthe spindle-end is universally adjustable and may thus :be located exactly in the s dva ta eous Pos t o Further novel features of the illustrated machine relate to improved work .feeding mechab 'reduced to a .These latter features are not claimed herein, but form the subject-matter of, and are claimed in, my United States patent application Serial No. 42,968, a division of this application, and filed on August-6,1948. 4

In the accompanying drawings illustrating one of the several possible embodiments of the in- -vention:

Fig. '1 shows the more essential portions of my improved rounding machine in front elevation;

Fig. 2 is a side elevation, looking from the left in Fig. 1;

"Fig. 3 an elevation of the opposite side of the ma in Fig. 51, 2. perspective view of the elements more closely associated with the work;

Fig. :5, a broken top-plan -view of the bottomrestfand the cooperating feed-arm;

Fig. 6., a detail, in elevation, of the mounting for the bottom-rest, viewed from the right of the machine; and '3 Figs. '7, 8,9 and 10 are, respectively, enlarged sections on the lines VII-VII, 'VIIL- -VIH, 'I X IX and XX, Fig. '7 showing the means "for oscillating the 'feedgarm, Figs; -8 and -9 the means for producing the work-engaging movement of the feed-arm, and Fig. 10 the means for reciprocating the bottom-rest.

' Acons'iderable number of the elements of the present machine are substantially the same as in the well {known Goodyear Universal Rounding IandChanneling Machine, Model E as disclosed in Letters Patent of "the United 'States No.

$330,606, granted June '25, 1'91 2,upon an applicationfiled in the name of Frederick H. Perry. Referring first to parts of the present machine which ay read y be de fied i e P y patent, a vertical column 20 carries at its upper extremity a head 22 upon which the various .w r rs i i e' e d ra i m mb are sup- ;ported. A crease-guide 2A of generally U form, to e eive he crease o a s being o erate "on, is :adjusta'bly secured to the upper forward j'port'ion of the head by sl'ot-andgscrew connecftions {226, instead of being arranged .for jveiti 1-1 o c l o as n t e pr v ou y me on ;chine. In "the upper portion ,of the head 223s 'journa-lecl 'a horizontal shaft 2%, oscillated as will be later "described, and haying 'iiked to as forward extremity a 'feed-armejdlly-ing between the opposite arms of the crease-guide. With the crease ;of a shoe applied to the crease-guide, as appears in Fig; 4, the usual *feed -point fixed to the reed-arm receives contact'of the flange of; a

.44. ..tremity of the bracket and a collar 88 secured stitchdown-shoe or the welt applied thereto. Reciprocable in horizontal ways at 32 in the head is a slide 34, in which is fixed a rounding knife 36 cutting against an anvil set in the feed-point. The construction of the knife-operating means is the same in the present machine as in the abovementioned Perry machine.

Now, to describe the novel features of this invention and the changes which have been made in the original machine to adapt it to its present use, it may first be said that the mechanisms more directly connected with the channeling of the shoe and for varying the extension of its rounded edge are omitted. Projecting from the lower portion of the head at the front is a stationary sleeve 38, upon the forward end of which is a vertical extension 40 having in its front face a horizontal guideway 42 (Fig. In the guideway a slide 44 is movable, it being reciprocated through a forwardly projecting stud 46 1ying in a slot 48 formed longitudinally of an arm 50 fast upon a shaft 52 arranged to oscillate in the sleeve 38 and in a bearing in the head 22. The shaft is oscillated by an arm 54 fast upon it (Fig. a toggle 56, pivoted to the arm and to the head, and an eccentric-rod 58 joined to the center of. the toggle, the strap of which rod surrounds an eccentric 60 secured to a shaft 62 journaled in the head parallel to the shaft 52.

.The shaft 62 carries a pulley 64 through which it is rotated from some source of power.

I A rearwardly offset portion at 66 of the slide 44 has, at its front, a vertically curved surface 68 (Fig. 6) against which rests the complemental surface I0 of a carrier member I2 adjustably secured to the slide by a slot-and-screw connection 74. Joined to the carrier by a vertical pivot-screw I6 is an outwardly curved horizontal strip T8, the central portion of which lies opposite the feed-arm 30, furnishing a rest for the bottom or tread-surface of a sole attached to a shoe. The end of the rest 18 opposite its pivot has fixed in it an eye 80 engaged by a hook 32 providing a universal connection to a horizontal rod 84 passing through an opening in a rearwardly extending bracket 86 attached to the slide Interposed between the angular rear exto' the rod by a screw 90 is a helical spring 92. .The rest I8 is urged by the spring toward the feed-arm, to an extent permitted by a collar 94 secured to the rod for engagement with the end of the bracket, to hold the margin of the shoe- ;bottom gripped yieldably between the opposed members. The applied force may be altered by changing the position of the collar 88 upon the rod. The bottom-rest may be withdrawn from the feed-arm by an arm 96 forked at its upper end to receive the rod 84 and attached to a spindle 98 (Fig. 2) guided to move horizontally in the head 22. Fixed to the spindle is a collar I00, with which contacts an arm I02 rising from a shaft I04 journaled in the head transversely of the spindle. To the end of the shaft I04 opposite the arm I02 is fixed an arm I06 (Fig. 3), the upper end of which is engaged by the depending arm of a bell-crank-lever I08 fulcrumed upon the head. To a horizontal arm of the bell-crank is pivoted a rod IIO leading to an unillustrated treadle, which is held raised by the customary spring. The normal position of the bell-crank is determined by a stop-screw II2 contacting with the head. Depression of the treadle and rod IIO, acting through the chain of elements just indicated, shifts the arm 96 rearwardly '4 against a collar H4 fast upon the rod 84. This draws the bottom-rest rearwardly from the feedarm, compressing the spring 92. The feed-arm 30 is oscillated in the correct time relation to the reciprocation of the bottom-rest to advance a shoe during an operation upon it, through an arm II6 having its hub secured to the shaft 28 (Fig. 7), a toggle H8, pivoted to the arm and to the head 22, and an eccentric-rod I20 actuated by an eccentric I22 fast upon the shaft 62.

During the oscillation of the feed-arm 30 and the reciprocation of the bottom-rest 18, they are separated at the end of the forward stroke, freeing the work after a step in its advance, then closing again upon the work at the termination of their idle reverse movement in preparation for the production of the succeeding step. For this purpose, a movement of reciprocation fore and aft of the machine is imparted to the feedarm. This arm is urged yieldably away from the bottom-rest by an expansion-spring I24 (Fig. 2) contained in an axial bore in the shaft 28 and abutting at its outer end against a plate I26 attached to the head 22. Arranged to turn loosely upon the shaft 28 are arms I30 and I32. The arm I30 (Fig. 9) is oscillated by its connection to an eccentric-rod I34, the strap of which encircles an eccentric I36 fast upon the shaft 62. The arm I32 (Fig. 8) is oscillated oppositely to the arm I30 through an eccentric-rod I38 actuated by an eccentric I40 upon the shaft 62. On the inner face of the hub of the arm I30 is a cam-depression I42, and cooperating with this, upon the hub of the arm I32, is a cam-projection I44. At the time the feed-arm so is to be carried in to clamp the work against the back-rest 78, the cam depression I42 is turning contraclockwise, as viewed from the front of the machine, while the cam-projection I44 is turning clockwise. As the inclined end Walls of the depression and'projection engage .and'pass each other, as a result of their opposite movement, since the hub of the arm I30 bears at its outer side against the adjacent surface of the'head 22, the projection I44 rides out of the depression I42 onto the end of the hub of the arm I30. The arm H6 is fixed to the shaft 28 and is backed by a collar I46, also fast upon the shaft and spaced from the adjacent surface of the head. The feed-arm 30 is therefore abruptly shifted rearwardly toward the bottom-rest i8 to'grip the sole-margin, which is thereafter as quickly freed when the projection and depression again mesh, because of the reverse oscillation of the arms I30 and I32 and the expansion of the spring I24. By the prompt engagement of' the feeding members, there is utilized the maximum time in an operating cycle of the machine during which the Work may be advanced, and by their prompt disengagement, there is minimized the time during which the work might back-feed.

To outline the manner in which thefeed-arm 30 and the bottom-rest I8 cooperate to advance the work for the rounding of the sole s of a shoe S by the chopping knife 36, the operator, by drawing down the rod IIO through the treadle, retracts the bottom-rest from the feed-arm and inserts the sole-margin between them, then releasing the treadle. Engagement of the crease With the guide 24 (Fig. 4) determines the path through which the work will move and the width of the sole-extension produced by successive cuts which the knife makes against its anvil. At the beginning of a work-advancing cycle, an d viewing the elements from the operators position at ame the front of the machine, :both the feed-arm and thejbottom-rest are at the extreme right, with the bottom-rest having moved farther in that'direction than the feed-arm. They are spaced from each other transversely to such an extent that a sole which has been between them will have been released; First, the feed-arm is carried rapidly in by the cams I42 and I 44, so it acts upon the upper margin of theshoe-bottom toclamp the tread surface against the bottom-rest. Starting at substantially the same time, the two feeding members are moved to the left through their full strokes by the respective eccentrics 60 and I22, the bottom-rest traveling more rapidly than the feed-arm. As a result of this different rate of movement, and the fact that, as may be seen in Fig. of the drawings, the work-engaging surfaces'of themembers converge in the direction of travel, "a wedging action is produced, the bottomrest forcing the sole-margin outwardly against the feed-arm. Thus, without the danger of 'marring the tread-surface of the sole, which would exist with the use of a roughened member, the work is firmly gripped, even if the sole presents a polished or smooth surface. Having made the forward and fully effective feed-step, the feedarm is quickly withdrawn by the spring I24 as permitted by cams I42 and I44 to release the work, and the bottom-rest 18 is retracted to its initial position by the eccentric 60, the feed-arm remaining in its advanced position while the rounding knife .36 comes forward and makes its out against the anvil on the feed-point. This is followedby retraction of the feed-arm under the influence of theeccentric I22 so both members are restored to normal, ready for the succeeding operating cycle. It is .to be notedthat the work-feeding movement of the bottom-rest 18 is rectilinear and. not oscillatory, as in the old machine. If the bottom-rest were to swing upwardly as well as forwardly in the advance of the work having soles of rubber or other readily compressible material, its upward pressure would cause the sole-edge to bulge outwardly and to be held in this condition while the rounding knife makes its out. When released, the edge springs. back so an objectionable inward bevel would be formed instead of'the desired vertical edge.

In the rounding of stitchdown shoes, in which a flange of the upper material extends over the upper margin of the sole .9 (Fig. 4) irregularities occur in the surface of the flange which contacts with the crease-guide 24. These may be the result of cutting away or pinking the flange to facilitate carrying the upper about the more sharply curved peripheral portions of the shoe at the crease c, or; in absence of such pinking, the flange may be puckered or gathered at the curved portions. In the first instance, as the work is fed forward, the spaced fingers of the flange produced by the pinking may engage or be deflected outwardly by the edge of the guide. This will so position them that they will not be trimmed by the knife 36. The projectionsof the unpinked flange, by's'triking against the, edge of thecreaseguide, tend to interfere with the advance of the work; "Toguard against these. difliculties, I attach to the t'o-p' of'the head 22, at the front, a bracket I60 through which'is. a horizontal bore. Secured in the bore by av SBtHSCI'BW I62 is the shank I64 of a block [66. In a bore in the block, extending transversely of the shank I64 is the shank I68 of a bearing member I fixed in position by a set-screw I12. Rotatable in the bearing member is a spindle I14, the location of which longitudinally of its axis may be determined by collars I16, I 16 ad'iustably secured to the spindle by setscrews I118- The lower collar is normally spaced from the-adjacent end of the bearing. v The lower extremity of the spindle is roughened, it being herein shownas toothed 'by forming in its conical end I19 peripheral grooves I and longitudinal grooves. I82. The capacity for variation in the position of the shanks I64 and I68 both longitudinally and angularly, and for change in thie'longitudinal position of the spindle, renders the end of said spindle universally adjustable, .so it may be located in any chosen relation to the edge of theguide 24 toward which the upper margin of the shoe-bottom advances. This is pref erably with the conical end in close proximity to the guide, the axis of the spindle being upwardly and rearwardly inclined and the apex of the end preferably lying at or just below the crease-entering end of the guide 24 and the side which engages the upper flange f .situated approximately in the plane of the flange-contacting face of the guide. The spindle I14 is rotated in a contraclockwise direction, as viewed from above, by a :pulley I84 fast upon it, and driven .by a belt I 86 operating over the guide-pulleys I88 rotatable upon a bracket I90 secured to the top of the head I22, and over a pulley I92 flx-ed to the shaft 62.

As the surface of the flange f of the shoe 1S approaches the conical spindle-end I19, it enters a converging throat formed between the upper margin of the sole s and the curved surface of the spindle. The roughened surface of the spindle presses against the surface .of the flange and smooths out any divided portions, unfailingly insuring that they will pass at the inner side of the guide 24 and will not contact with its edge. Uneven portions of the flange-surface are compressed and smoothed by the combined pressure and rotation of the spindle, so they lie at the inner side of the guide, where they do not interfere with the feed of the work by engagement with the guide-edge. Because of the direction of rotation of the spindle-end, it olfers no frictional resistance to the advance of the work. Since the spindle is capable of rising to a limited extent in its hearing, it floats in the crease c and is displaceable upwardly as the work is turned at curved portions. Consequently, it does not affect the positioning of the shoe by the guide. The angular adjustment of the bottom-rest 18 through change in the position of its carrier 12, disposes the thread-engaging surface correctly for differently curved shoe-bottoms. Since the center of curvature of the surfaces 68 and 10 preferably lies at the upper edge of the rest, the adjustment does not disturb the desired vertical relation of said rest to the cooperating portions of the crease-guide 24 and feed-arm 30 Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States is:

1. In a rounding machine, trimmingmeans, a member by which the work is guided toreceive the action of the trimming means, and a pressure member situated at the edge of the guide member toward which the Work advances and presenting to the upper margin of 'a shoe-bottom a work-engaging surface inclined forwardly and inwardly.

.. 2. In a rounding machine, trimming means, a member by which the work is guided to receive the action of the trimming means, and a pres- 75 sure member situated at the edge of the guide member toward which the work advances. and presenting to the upper margin of a shoe-bottom a work-engaging surface inclined forwardly and inwardly, said pressure member being free to move transversely of the margin.

3. In a rounding machine, trimming means, a member by which the work is guided to receive the action of the trimming means, and a rotatable pressure member situated at the edge of the guide member toward which the work advances and engaging the portion of the upper margin of a shoe-bottom which is about to be engaged by said guide member.

4. In a rounding machine, trimming means, a member by which the work is guided to receive the action of the trimming means, and a rotatable pressure member situated at the edge of the guide member toward which the work advances and engaging the upper margin of a shoe-bottom, said pressure member being displaceable, by the work longitudinally of the axis of rotation.

5. In a rounding machine, trimming means, a member by which the work is guided to receive the action of the trimming means, and a rotatable pressure member situated at the edge of the guide member toward which the work advances, said pressure member engaging the portion of the upper margin of a shoe-bottom about to be engaged by the guide member and presenting to the said upper margin a surface inclined forwardly and inwardly.

6. In a rounding machine, sole-trimming means, a member by which the work is guided to receive the action of the trimming means, a rotatable pressure member situated at the edge of the guide member toward which the work advances, said pressure member engaging the portion of the margin of :a shoe-bottom about to be engaged by the guide member and presenting thereto a surface inclined forwardly and inwardly, and means for rotating the pressure member.

7. In a rounding machine, sole-trimming means, a member by which the work is guided to receive the action of the trimming means, a pressure member situated at the edge of the guide member toward which the work advances and presenting to the upper margin of a shoe-bottom a work-engaging surface inclined forwardly and inwardly, a support for the pressure member, and means arranged to vary the position of the support and pressure member to provide for the universal adjustment of said member.

8. In a machine for rounding the soles of shoes in which a flange of upper-material extends over the upper margin of the sole, a guide receiving the crease of the shoe and with the inner face of which guide the flange contacts, a sole-rounding knife, work-feeding members engaging the sole and flange to advance the work to receive the action of the knife, and a rotatable spindle contacting with the flange at the edge of the guide toward which the work advances.

9. In a machine for rounding the soles of shoes in which a flange of upper-material extends over the upper margin of the sole, a guide receiving the crease of the shoe and with the inner face of which guide the flange contacts, a sole-rounding knife, work-feeding members engaging the sole and flange to advance the work to receive the action of the knife, a rotatable spindle provided with a conical end contacting with the flange at the edge of the guide toward which the work advances, and means for rotating the spindle to cause the flange-engaging surface of the conical end to turn in the direction of workadvance.

10. In a machine for rounding the soles of shoes in which a flange of upper-material extends over the upper margin of the sole, a guide receiving the crease of the shoe and with the inner face of which guide the flange contacts, a sole-rounding knife, work-feeding members engaging the sole and flange to advance the work to receive the action of the knife, a rotatable spindle provided with a conical end contacting with the flange at the edge of the guide toward which the work advances, said spindle being displaceable longitudinally of its axis by the shoe, and means for rotating the spindle to cause the flange-engaging surface of the conical end to turn in the direction of work-advance.

11. In a machine for rounding the soles of shoes in which a, flange of upper-material extends over the upper margin of the sole, a guide receiving the crease of the shoe and with the inner face of which guide the flange contacts, a reciprocable sole-rounding knife, work-feeding members engaging the sole and flange to advance the work to receive the action of the knife, a rotatable spindle contacting at one end with the flange, a support in which the spindle is rotatable, means arranged to fix the support in different positions to locate the spindle-end differently in the direction of advance of the work and toward and from said work, and means arranged to determine the longitudinal position of the spindle.

12. In a machine for rounding the soles of shoes in which a flange 0f upper-material extends over the upper margin of the sole, a frame, a guide-carried by the frame and receiving the crease of the sole and with the inner face of which guide the flange contacts, a sole-rounding knife reciprocable in the frame, work-feeding members movable upon the frame and engaging the sole and flange to advance the work to receive the action of the knife, a supporting member mounted for adjustment upon the frame transversely of the path of the work and angularly in the direction of work-advance, a second supporting member mounted for adjustment upon the first supporting member angularly toward and from the path of the work and in the general direction of work-advance, means for fixing the supporting members in different positions, and a spindle rotatable in the second supporting member for contact with the flange.

CORWIN W. BAKER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 2,319,296 Brostrom May 18, 1943

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