US2461587A - Sole stitching machine - Google Patents

Description

Feb. 15, 1949. C, CARUNQ 'SOLE STITCHING MACHINE Filed JulyJ '18, 1945 3 Sheets-Sheet l 3mm/bo@ armeZoCa/rlvno,

Feb. 15, 1949. c, CARLlNQ 2.461,587

- SOLE STITGHING MACHINE Filed July 418, 1945 s sheets-sheet 2 rmelo C'arlno,

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Feb. 15, Q CARLINO soLE STITGHING MACHINE Filed July 18, 1945 3 Sheets-Sheet 3 Patented Feb. 15, 1949 SOLE STITCHING MACHINE Carmelo Carlino, Buenos Aires, Argentina Application July 18, 1945, Serial No. 605,784

In Argentina June 14, 1945 s claims. (01.1'12-2) This invention relates to an improved machine for the lateral sewing of the soles of alpargatas or canvas shoes, by means of which several important advantages are secured which will hereinafter more fully be described.

One of the principal advantages attained by the improved machine in accordance with this invention, consists in entirely avoiding any danger of the needle or punch cutting or otherwise damaging the welt, a drawback generally inherent to the known machines actually in use and which is a cause of serious losses amounting to about 14 to 16 per cent of the production manufactured,

Another advantage of the improvements in accordance with this invention consists in that by the use of the same a saving of about 5.76 meters of thread per dozen of canvas shoes is obtained, which multiplied by the number of dozens manufactured per day means quite a valuable amount.

Finally, as a further advantage worthy of consideration it should be noted that by the use of the system of perforating the sole of the canvas shoes performed by the machine in accordance with this invention, av saving of about 50 per cent of the power actually required by the machine operating according to the actual methods is obtained.

The novel machine of this invention also offers several minor convenient features of structure and use which will be referred to in the course of this specification.

VAll of the several advantages and featuresV above set forth are secured by the particular construction and arrangement of the improved ma- -chine of which a preferred embodiment will now be described, by way of example, with reference to the accompanying illustrative drawings, wherein:

Figure 1 shows a side elevation of my improved machine for the lateral sewing of the sole of Figure 5 is a view similar to that of Figure 2,'

in which may be seen the position of the needle 2 and the punch at the moment of starting the feeding movement, after performing a stitching operation. v f

Figure 6 is a fragmentary front View of the machine, showing the arrangement of the transsuccessive molds,

Figure 9 is an elevational view showing the relation of the respective cams and levers actuated thereby.

Figure l0 is a view partly in cross section of the front part of the machine showing how the molds are supported. The same numbers of reference have been used to indicate like or corresponding parts in all the several views.

The elements shown by way of example tend to attain, as already statedbefore,"the three basic advantages above` referred to.

vWhen observing Figures 2 to-5, it will be noted that, as distinguished from the methods actually lin use. the needle I is arranged with an additional punch 2, in accordance with the improvements which form the object of this invention, on the same line with and opposite to a punch` 3, mounted on the lateral support opposite to a guide member hereinafter to be described.

In a similar way and also as distinguished from the machines actually in use,A the operation performed when passing from one mold to the other, does not consist in the present case in interrupting the stitching operation, but by the pressure of the mold, a double linear displacement of the feeder device or rack driving the same is performed.

Referring to the drawings and ilrsty with particular reference to Figure 1, there is shown in a frame l', a driving means for the needle l and the additional' punch 2 mounted in a chuck or carrier 8, and for the punch 3 oppositely aligned with theneedle i mounted in a chuck or carrier s". The chuck or carrier s' for the punch 3 is` mountedion the machine opposite the needle car rier'.v The, above `referred vto driving means comprises a needleY operatingcam disc 4 keyed to`ar shaft 4' journalled in bearings 'la and 1b mounted in the standards or uprights of the frame 1.

The cam 4 is rotated with the shaft 4' by suitable power means, such as an electric motor A and a belt and pulley drive B. Transverse the lower portion of the frame is a bar 'lc and pivoted to this bar is an end 6 of a curved lever arm 5. The lever carries a small roller 5a, rotatably mounted on, a'pin extending from the side of the leverl 5 adjacent the cam 4 so that the peripheral rims of the rollers 5a and the cam 4 are in frictional engagement. Thus as the cam 4 is rotated its engagement with the, roller 5a causes the free end of the lever arm 5' to angularly rock back and forth according to the con tours of the cam disc 4.

The free end of the lever 5 is formed into a forked member 5b. The forked member 5b engages a pin 5c extending from the side of they needle carrier 8, in which is secured the needle l and the respective additional punch 2. The. forked member 5bisA thus adapted to convertv the angular rocking motion of the lever 5. into. a` linear motion, with the needle carrier 84 and the needle l and punch 2,

lIheAY punch 3 mounted in carrier 8 opposite to. needle l isoperated in a; synchronous manner with, respect to the needle carrierv 8 from cam e by a lever arm 9 pivoted at one end on a pin l!) mounted infr-aine: 1. The lever arm 9 is connected4 aboyefitspivnt, pinA L8; by a. link l I. to lever arm I2 piyotedat its lower endon a pin I:2a in frame 'I,r while its upper opposite end mounts a roller 12h. for frictionalengagement with the periphery of the cam 4 on the opposite. sidev fromV the frictionv` roller, 5d, ofi lever arm 5. The free upper. end of the lever. arm Seis connected by a forked member 9a around a pin 9b in. a similarv manner to. the formerlever 5; to the slidable clincka, which mounts and carriesthepunch. s.

From the foregoing description itI will be1 seen. that one Qi the. improvements introduced.. into the. machines. for the lateral stitching. of alpargata soles consists, as already stated, inthe alignL nient of` the needle I. and. the corresponding punch 3. ci? the opposite support,I and in the use of an additional punch. 2,A adapted. to simultaneously operate. with the. needle.`

With particular reference to, Figure. 9, therevis mounted. on. the end, of shatt 4f extended from the exterior of trameA 1 abeyel pinion. L3! which meshes with., a similar pinion IB; mounted. on the @ridd O er shaft Ma mounted in suitable bracketsL notv shown., oni each side.y of. theframe. 1.. The shaft, Mu. is. rotatabley from the. same power source A and' B, by transmission of the power throughthe said pinions.. and this shat I4a has keyedi thereto a, cam` I4, which. rotates asv shown in Figure 6j. As the cam I4L rotates its periphery is positioned s o as to frictionally engage with. the peripheryof'a small roller I E, fixed or rotatably mounted' on a pin orshaft I6, which pin extends from the-side of'a pivoted'lever II;

The lever II is pivoted to an extension on the lower end ot tlieframa'lv on a pin I'Ia, whileV its opposite end is. connected' by means of a small connecting link. I8. toJ an alternately forwardly and rearwardly slidablefeedracki I9; The lever I 'I. isi consta,ritl-I urged: in. the direction oi the cam I4 by mea-ns. of a spring 20 anchored at'v one end. to, the arm betweeri-y the roller I5 and the link lfand. at the other endto the frameY 1:.

Below the,k rack.` arelease mechanism is pro.- videdconsisting. of a pivoted swing bar 2l, pro-v vided, on its twoJ ends with studs` or; contact mem.-

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4 bers 22, 22', projecting towards the rack, and on this latter is provided a small projection or stop 23 which during a certain period of the transportation or feeding movement is in engagement with the stud 22.

To the extension of the swing bar carrying the studV 22, one end of a spring 24 is connected which operates to permanently pull the said extension, in a downward direction.

Each ol the sole carrying molds 24" is provided with a rotatable pawl 25 ln engagement with the teeth of the rack I9, for causing the displacenien-t of said molds in continuous succession.

For the better understanding of how at the required moment is performed the double linear displacement. of .the carrier or feeder rack I9, it shouldbe noted that between the centre of the cam I4 and the points of maximum and minimum distance to the periphery of the same, a clifference equivalent to two steps of the rack exists. With: reference to the' functional' aspect. ofi the device shown in; Figures 6. to *7,` it will readily be seen that the rotation of the cam 4; will. cause the rotation of the meshing bevel pinions t3: and

3. The former pinion, by means of its shaft- 4', Willi` rotate the camv I4; which, in turn will movel the feed` rack, i-n the man-ner now' to be described..

When the point of the cam i4 most distant. from its centre. I4 is in engagement. withv the' roller I5 the assembly will be. in. the position. shown with dottedlines in Figurer 6 andv in con-A sequence-the-arm. I? will pull therack I9- through its connecting rod: t8 and thus cause the mold 2d" to advance the distance of one tooth. During this time,` the swing arm 2i will. occupy the position indicated in said Figure 6'. While: thecam disc, I4 conti-nues. its rotationl the. arm H will, beretracted to its former position byy the. action. of the springZ.

WhenI said. roller t5 Will occupy the point et minimumv distance with regard tof the centre of thecam t4.; the distance which will existbetween said cam and,v said rollery will be equivalent te one.-` step.- of the.J eect rack. condition is owingto the. fact. that, noti-vithstanding` the pull. exertedV by the spring 28, the arm I'I and in consequence the: rack I9,v have been unable ilo-complete their displacement. being prevented from doingA so. by' the element'ZZf which. engages withthe-stopV 23e When the sole will have reached` the position shown in Figure, 1 which isA the. step directly following: the condition shown. in Figure: 8, the projection 22 will Vhave: been released and. in consequencel theswing armtl. will oscillate aboutv its pivot. and thus releasek the stopf 23;

At this moment,I the. arm. I,'I will.. extend over the entire distance existing between the rollen I5. and. the point` of minimum, distance of the cam. I4, which, as has been stated before, is equivalent to two; steps` of: the rack and incon.-` sequence as the-cam t4. rotates through 180, the carrier or feeder wil'lfV perfor-ln` a. motionequivalent to the double. of` that described. and shown: for the positionirepresentedin.Eigurei To make the operation of..A the feeder4 andstop mechanism. entirelyclearity will. bef stated that the molds are ordinarily movedathedistance ofy one rack tooth by the cam. I4. because the; arm i?.` normally engages the rear edge: of thestop member 2.3v preyentingA the retraction of. thefra-ckr., Thusthe cam. I4 normallyengages` the: roller l5- only during its cycle of greatest` throwi. Howhr ever.,` when the` arm- 22. reaches, the space between the moulds, the lever 2|, rotates under the; action of the spring withdrawing the arm '22 from the path of the stop 23, permitting the rack to move rearwardly under the action of the spring 20 the distance of two rack teeth.

From .the foregoing it will be understood that in the period of time elapsed, the repetitionof the double displacement just referred to, will depend in all cases of the length of the two molds 24'.

With regard to the particular arrangement of the needle l and thev punch Sand the addition of a further punch 2, the operation of the device, in accordance with Figures 2 to 5, may be described as follows.

Considering Figure 2 to represent the initial position of the parts, the first movement will correspond with the entrance of the punch 3 which, by passing through the sole, will form the hole by which will penetrate the needle l. After the punch 3 having completed its stroke in the direction shown, it will commence to recede while simultaneously the needle l will advance through said hole, and the additional punch 2 will form an initial orifice.

The needle l and the additional punch 2 having performed their entire stroke, both of said members will be retracted, while the punch 3 will remain stationary until the related parts that is, the needle punch 2 and punch 3 will have reached the position shown in Figure 5.

Under these conditions, the feeding of the mold will take place by the distance of one step, as before described and it will be noted that the punch 2 will have performed a small preliminary perforation in the sole, which at the following repetition of the cycle, will be completed by the punch 3.

From the foregoing description it will be seen that owing to the particular arrangement shown, the needle will not perform any perforation, but will only be inserted in a hole already formed. On the other hand, the operation of the punches 2 and 3 will not take place simultaneously, but in an alternate manner and in consequence, the effort to be exerted by the machine, will be reduced to a minimum.

At the same time, the initial perforation performed by the auxiliary punch 2 and afterwards completed by the punch 3, prevents the sole of the alpargata or canvas shoe from becoming fretted, a condition which generally occurs, when using one single punch, at the orifice of issue of the same.

'Ihe advantage of the saving of thread, referred to at the commencement of this description, is a consequence of the double stroke of the feeder rack, inasmuch as between the passage of one carrier mould to the other, no stitches are lost and the thread is left with a sufficient degree of tension to allow of the same being conveniently severed by any suitable device provided for that purpose in the machine.

With regard to the percentage of failure, or tear of the welt at the end of the shoe by the action of the punch or the needle, it will be clearly seen when observing Figure 8, that the punch will never perforate the ends of the sole.

Having thus clearly shown the advantages obtained by the use of the improvements above described, it shouldbe understood that several modications might be introduced in the arrangement shown and described, without departing from the scope of the invention as set forth in the following claims.

Having now particularly described and ascertained the nature of my said invention and in what manner the same isrto be performed, I declare that what I claim and desire to vsecure by Letters Patent, is: v

1. A machine for stitching the soles of canvas shoes or the like comprising a frame, guide means supported on the top of the frame, molds movably mounted in the guide, feeder means for moving said molds step-by-step from one end of the frame to the other, said molds being formed to hold the uppers and soles of a canvas shoe in proper position for stitching, a needle carrier mounted on the said frame transverse the said mold guide, a needle mounted in said carrier having associated integrally therewith an auxiliary punch, a second punch, a punch carrier oppositely positioned across said guide from said needle carrier, power means for said machine, a drive shaft connected to said powermeans, a driven shaft, a gear transmission operatively connecting said` shafts for rotation, a cam disc carried by the driven shaft, a lever actuated by said cam for driving said mold feeder means, and means actuated by the pressure. of one of the molds for causing a double alternate linear dis.- placement of the feeder movable into the, guide passageY between molds, whereby an alternate punching and sewing operation is provided.

2. A machine for the stitching of soles of canvas shoes or the like comprising a frame, guide means supported on the top of the frame, molds movably mounted in the guide, feeder means for moving said molds step-by-step from one end of the frame to the other, said molds being formed to hold the uppers and soles of a canvas shoe in proper position for stitching, a needle K carrier mounted on the said frame transverse the said mold guide, a needle mounted in said carrier having associated integrally therewith an auxiliary punch, a second punch, a punch carrier oppositely positioned across said guide from said needle carrier, power lmeans for said machine, a drive shaft connected to said power means, a driven shaft, a bevel gear secured to an end of said drive shaft, a similar bevel gear secured to an end of said driven shaft, said gears being in mesh, a cam mounted on said drive shaft, a second cam mounted on said drive shaft, said first cam being adapted to actuate said needle carrier and said punch carrier with an alternate punching and sewing operation, said second cam being adapted to actuate said feeder means, said feeder comprising a mold feed rack, said rack being driven by said cam so as to feed said molds forward step-by-step along said guide, and a swing arm having upwardly projecting ends laterally with respect to said rack through the bottom of said guide means, to thereby limit the movements of said rack and the movement of said molds according to the alternate actuation of said needle and punch carriers.

3. A machine for the stitching of soles of can-4 vas shoes or the like comprising a frame, guide means supported on the top of the frame, molds movably mounted in the guide, feeder means for moving said molds step-by-step from one end of the frame to the other, said molds being formed to hold the uppers and soles of a canvas shoe in proper position for stitching, a needle carrier mounted on the said frame transverse the said mold guide, a needle mounted in said carrier having associated integrally therewith an auxiliary punch, a second punch, a punch carrier oppositely positioned across said'guide from'said Y :7 anecdle `car-111er, fpower means. forsad machine, -a .drive shaft connected :to said .power imeans, .a zdrivenrshaft, 1a bevel ggear secured to `arr-.end .of said drive shaft, a similar bevel `:gear .secured 7to amend vof said .driven shaft, r:said gea-rs `Vbeing in mesh, `a cam 4mounted .on said l'drive shaft, .a second cam mountedo'n `said driven shaft, said Xfirst cam :being adapted .to vactuate said meedle .carrier and said punch Fcarrier .with -an alternate v-punohinga-nd sewing operation, y:said second cam fbeingra'dapted to actuatesaid feeder means, said 1feeder comprising a .mold deed rack, said .rack abeingfdriven by saidcam so fas ito `feed said=-mo1ds lforward `:step-by-step along .said .guide, a swing arm 'having upwardly projecting ends "laterally with respect to `said .rack .through ythe .bottom :of .saidguide means, .to .thereby limit .the move- 4ments .of v:said track zand Vthe movement of :said :molds according to `.tl-le alternate actuation Vof said needleiand .punch carriers,a stop extending -fltoma side of said rack, 'said sewing arm being .centrally pivoted intermediate its ends to :said aframefbelow said guide, one of its projecting ends :serving .as a stop .for the feeding motion of said rackzwhen moved .upwardinto the guide -bypressure of Vone of lthe molds on the other of v.said v.and -.a spring .adapted to normally urge REFERENCES CITED IAhe following .references :are o'f :record in the fiile of this .,patent:

Number AName :Date 'izo '2,302,454 Martinez N ov. "17, 1942 FOREIGN PATENTS Num-ber -Country Date 445,443 France Sept. -3, 1,912 11"'14 Great Britain Janfl, 1914 814,416 -France Mar. v15,'1937

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