US1688556A - Pulling-over machine - Google Patents

Description

Oct. 23, 1928.

l. RI'ESZ PULLING-OVER MACHINE FledNOv. 5. 1920 '7 Sheets-Sheet l Ingenar fran Y Oct. 23, 1928.

l.' RlEsz PULLING OVER MACHINE Filed Nov. 5, 1920 '7 Sheets-Sheet 2 fr@ iej y' l. RIESZ PULLNG-OVER MACHINE Filed Nov. 5, 1920 '7 Sheets-Sheet 5 Oct. 23, 1928.

I. RIESZ PULLING-OVER MACHINE Filed Nov. 5. 1920 '7 Sheets-Sheet 4 Oct. 23, 192s.

l. RIESZ PULLING-OVER MACHINE Filed Nov. 5. 1920v 7 Sheets-Sheet 6 Oct. 23, 1928.

Fig-8.

" ot a cont-i nuously rotating shaft.

Patented Oct. 23, 1928.

PATEhVl` GFFlQE.

IVAN RIESZ, 0F WEISSENFELS, GERMANY.

PULLING-OVER FACHINE.

(GRANTED UNDER THE PROVISIONS 0F THE ACT 0F MARCH 3, 1921, 41 STAT. L., 1313.)

Application led November 5, 1920, Serial No. 422,045, and in Germany December 23, 1918.

The present invention relates to an improved pulling-over machine, for pulling an upper over an upright last.

rlhe pincers and their actuating mechanism are enclosed in a box-like frame the front and rear wall of which are partly removed and the table-plate of which can be lifted so that all parts are readily accessible.

The stretching of the upper and the pulling of the upper away from the sole of the last are completely independent of the other operations of the machine. The pulling movement of the pincers is effected by treadles through the medium of a brake band applied to a drum The reverse mori lent of the pincers against the sole of the last to lay the margin of the stretched upper over the insole is derived from a shaft put during' each cycle, into operation for one revolution only.v Though the stretching` movement of the pincers is independent of the other operations, the machine is so constructed that the amount of the reverse movement of the pincers remains in a suitable relation- .ship to the amount of the variable stretching moren'ient.

The pincers are combined with the nailingmeans and come in their upward movement into contact with the sole of the shoe which is held onto its support by means of a holddown hereinafter' described. The machine is put into operation by a handlever which before clutching the machine lowers the hold-down onto the last. The hold-down is thereupon positively pressed onto the last by the machine shaft. r.the last support is provided with a linger which holds the toe stiifener inserted into the upper materials and prevents it from being drawn out of place while the upper is stretched. v p p lu the accompanying drawings 1 is a side elevation of the complete machine. Fig. 2 is a similar view with the table-plate lifted.

3 shown in section. Fig. Il is a detail view of the pincer mechanism in side elevation. 5 shows a plan View of the actuating mechanism of the pincers. F ig. G is an elevation of is a side elevation with some partsV a part of this mechanism with some parts shown in section. Figs. 7 and 8 illustrate the hold-down in position of rest and in working position respectively. Figs. 9 and l0 show the finger for supporting the toe-stitlener in an elevation and in a front view respectively. Fig. 11 illustrates a front view of the presser foot of the holddown.

The main shaft 1 (Fig. 1) is connected by meshing' gears and a clutch -ineclianism Ywith the shaft 2. The shaft 1 rotates continuously while the shaft 2 maires one revolution only when it is clutched by the handle 3 as hereinafter described. Ou the shaft 1 there are mounted the brake drums et and 6 (Figs. 8 and for the toe pincers 5 and side pincers .7 r sjjiectirely. The brake bands S are attached or. one end by means of the bars 9, 10, to the treadles 11, 12 and on the other end to the links 13, 14, 1 and 8. The treadles 11,12, are lifted by springs al, g/ so that the b alie hands do not normally contact with the brake drinne. By depressing the treadles the contact is effected and the drums carry with them the hands and pull down the links 13, 14. `'lhe vliulrs 1.3, lll are pivoted to the two-armed levers 16, 1l' respectively, rotatable about the lined shaft l-and which are attached by the connecting-rods 18. 19 respectively to the toeand .side-pincers so that by depressing` the treadles and pulling` down the linls 1 3, 14 the pincers are closed and pulled down.

The pincer mechanism of the side pincers l.is illustrated in Fi et. 'lhe pincers are vertieallylmovable in the carrier 2O supported in the machine frame by means of the "pins 21. The body 22 of the fixed aw guides in a rearward groove the bar 23 for closing` the pincers. The bar 3 isconnected by the link 24 with the lever 25 pivoted at one end to the rod 19 mentioned above and at the other end at 26 to the carrier 20. The curved movable jaw 2S of thc pincers projectswith its spherical end 27 into a slot at the upper end of the bar 28 and is itself pivoted at 29 on the pineer body 22. A spring 3() arranged in the carrier 2O tends to raise the pine-cr body 22, the throw of which is limited by therollers 31 on the sides CII ot' the pincer body 22 acting against the upper' walls 82 of the cavity 33 ot the pincer carrier 20. At the lower end of the bar 23 there is pivotally arranged on the bolt 84 of the link 24 a prism 35 which slides in the guides 36 oit the carrier 20. h/lforeover, the pincer body 22 is connected at 37 with the link 38, the other pivot oi which may be for the present assumed as being a lixed one. The toe pincers are ot an identical construction.

On the shaft 2 (Fig. 6) there is 'fastened by means of a conical pin a. ring 39. On the ring 39 there is rotatably mounted a second ring 4() with two arms 4l, 42. 'l'he ring 39 is partly cut away to 'torni a race for the ball 99. Against the ball 99 bears the plunger S3 slidable in the ring 40. A leaf spring 84 secured at one end to thel ring 40 pushes 'with its free end the plunger S3 against the ball 99. The ring 40 has therefore the tendency to rest with the roller ot' its arm on the circumference of the cam 44 while the arm 4l carries two pawls 45, (F ig. 5) which engage with the. ratchets 47, 48. These ratchet wheels are integral with the toothed wheels 49, respectively with which 'the toothed rear ends 51, 52 of the levers 16, 17 mesh. At the torward ends of these levers there are pivoted the connecting rods 16 ol the toe-pinocrs and by means oi" the evcner 53 the connecting rods 19 o't the side piucers.

By depressingy the treadles ill, l2 the pincers are closed and pulled down thereby grasping and stretching the upper. TWhile the treadles are moved downward the levers 16, 17 swing clockwise as seen in Fig. and the toothed and ratchet wheels 49, 50 and 47. 48 swing in the reverse direction. The pawls 45, 46 engaging the ratchet wheels keep the pince-rs in their lowered posit-ion against the action of the stretched upper and ot the springs 30 (Fig. 4). To release partially or wholly the toe or side pincers the pa-wls 45, 46 are removed from engagement with the ratchet wheels 47, 48 by means ot two levers 54 (Fig. 6). rlhe hand levers project with rollers on their lower ends underneath the pawls 457 46. By swinging the levers 54 the operator may at will remove the pawls from engagement with they ratchet wheels7 whereupon the pincers return into their upper position owing to the action oit the springs 30 and to the strain oit upper-leather. By this means the pulling operation on the leather may` be repeated until the desired straino3 the upper is obtained.

This being donel the margin of the upper is tobe laid upon the insole. F or this purpose the shaft 2isclutched by means ol the ha ndlever 3 for one revolution only. The hand lever 3 is fastened to the shaft 57 (Fig. 7l p-.ivoted in the machine traine. To the shait 57 is also attached the arm 58 which Carr-ies the clutching bar 59 surrounding with the frame 6() the main shaft l. The motion is transferred by means ol toothed wheels Yfrom the shalit l to the sha'lft 2. ledges provided on the trame 6() act in moving upwards to couple the clutch arranged on the shaft l. The har 59 has a rack (32 meshing with the sector G5 oi the knee lever (34 pivoted at 63 and resting with the roller 66 at the end olf its other arm upon the periphery ot the disc 67 on the shatt 2. This disc 67 has a notch which the roller 66 o'l" the linee lever en gages owing to the action ot the spring 69, whereby the clutch is uncoupled. As long as the roller runs on the periphery the disc the machine remains coupled.

The cooperation of the roller 66 and the disc 67 to keep the clutch coupled or uncoupled is illustrated in Figs. 7 and 8.

Fastened on the shailt 2 is the cam disc G9, (Figs. 3 and 6), with a cam groove (not shown) with which enga-ges the roller '70 ol the. arm 7l swinging on the pivot l5. The arm 7l. is connected by the. link 72 with the lever 74 pivoted at '73 and connected by the link 75 with the elbow lever 77 pivoted at 76. The other end o'f the elbow lever 77 is connected by the draw bar 7S and the spring butler 79 with the bell crank 80 attached 'to the above mentioned link 38 (F 4). The butler cons sts ol' an external sleeve pivoted to the draw bar 78 and o'li a spring enclosed in the slee-ve. The upper end ot the spring lies against a plugl screwed into the sleeve while the` lower end rests upon a pin passing through the Yforked end olf the lever 80 and through elongated slots of the sleeve. lVhen the bar 78 is drawn downward the levers 80, 38 are. straightened and the pincers swung inward. ln order to lay the margin ot the upper onto the insole the pincers must also be raised against the latter. But this raising movement oif the pincers is hindered izo longI as the arm 42 rests with its roller 4&3 upon the cam 44 and so longI as the toothed wheels 49, 50 owing to the engagement 0" the pawh'I 45, 46 with the ratchet wheels l'. 48 cannot move clockwise. rlhe extension 91 of the cai'n'44 connected by the link S2 with the swinging lever 74 so that the inward niovcment ot the pinccrs is acrompanied by a swinging ot the cam 44 on its axis by which the roller is released. tio long as the roller 43 is not released the ring 49 with its arms 4l, 42 remains stationary although the shaft 2 is turning. lflereby the ring 39 fixed on the sha'lt 2 pushes back oy mranso'lf the ball 99 the plunger S3 arranged and guided in the. ring 4() against the action ot the spring 84. is soon as the roller 423 is released b v the cam 44 the ring 40 with its arms 4l, 42 and the wheels 49, 5() turn together with the sha'lt 2 and the levers 16, i7 swing owing to the tension ol1 the springs il() and ol the strain ot' the upper in anti-clockwise direction (Fig. 3) and raise the pincers against the sole of the last, which is held upon the support 86, 87 by the last presser 85. The'pincers come in contact with the insole and are caused to open by the springs 30. The two- armed levers 16, 17 and the ratchet wheels come thereupon to rest while the shaft 2 is yet rotating, because these levers 16 and 17, being connected by rods 18 and 19 to the pincers, necessarily come to rest when the rising pincers are stopped by Contact with the sole `of the shoe. The. roller 43 leaving the periphery of the cam 44 allows the ring 40 with its arms 41, 42 to be brought back into its normal position upon the shaft 2 by the .spring 84. The ring 40 then rotates with the shaft 2 until the roller 43 comes again to lie upon the cam 44.

The shaft 2 is clutched every time for one revolution only. The ring 39 is fixed to the shaft 2, and the ring 4() is rotatably mounted on ring 39. As the shaft'2 rotates, the ring 39 forces the ball 99 against the plunger 83, which, as shown in Fig. 6, is slidably mounted in the ring 40. The end of plunger 83 slides along and tends to straighten out the bowed spring 84, fastened at one end to the ring 40, and would cause revolution of ring 40 if the lat-ter were not held' against rotation by engagement of the arm 42 with the cam 44. As soon as cam 44 clears thearm 42, the spring 84, partly straightened out by engagement with the end of plunger 83, rotates the ring 40 on the ring 39 until the spring 84 returns to its normal bowed position when the ring 40 rotates along with ring 39 on the shaft 2.

Vhile the ring 40 is rotating the springs 30 are allowed to carry the pincers against the sole of the shoe and the levers 16, 17 swing in anti-clockwise direction. As the pincers come into contact with the shoe-sole their upward movement and the oscillation of the levers 16, 17 are stopped by the said sole. Consequently the toothed wheels 49, 50 and the ring 40 come also to rest, we may assume, after a rotation of about 27 OO. Of course, the shaft 2 and its ring 39 continue tokrotate until the full revolution is finished'. Again the. ring 39, pushes, by means of the ball 99. the plunger 83 out of the stopped ring-40 and'tensions the spring 84. Owing to this spring no breakage of parts is possible. Vhen the shoe is linished and is taken out of the machine the pincers are additionally carried upwards by the springs 30, the levers swing likewise additionally in an anti-clockwise Vdirection and rotate the toothed wheels 49, 50 and the ring 40`fo'r say about 90J so that the roller 43 of the lever 42 comes again to rest upon the cam 44.

The upward and return movement of the pincers depends as seen upon the pawls 45, 46 and wheels 47 48, 49, 50 swinging on the tively held on its support 86,

shaft 2. If these swinging pawls and wheels were not provided the pincers would remain in their lowest position and it would be necessary to lay the margin of the upper upon the insole and tack it thereto byy means of wipers moving in the plane of the insole. The opened pincers are additionally pushed inward by the springs of the butllers 79 until the s erews88 of the elbow-levers 80 are arrested by the dogs 89 of the pincer-carriers 20, Fig. 4. During this additional inward movement the margin of the upper leaves the pincers the upper faces of which wipe the leather' over the insole and press it against the latter' during the tacking operation. As the pincers owing to the differentcurvatures of the last bottom and the different ldegrees oftension at the toe and the sides of the last do not simultaneously open, the driving parts 45, 47, 49, 51, 16, for the return movement of the toe-pincers are quite separate from the corresponding parts 46, 48, 50, 52, 17 of the side pincers. The side-pincers too are independent from each other by the provision of the evener 53. All pincers are raised by separate springs 30. The margin of the wiped-over upper is tacked to the insole in any known manner by the tack-drivers 90.

During the laying-'down and wiping-over and especially during the tacking of the margin ofthe upper the shoe must be held upon v its support 86, 87, 91 against sideward movement and against the blows of the 'taekdrivers. ThisA is obtained by the downhold 85. In the new machine the downhold is brought to bear on the last by the operator and is then positively pressed down by the machine itself. Preferably the downhold is lowered and the machine thrown into gear successively by the same lever 3, see Figs. 7, 8.

The downhold is carried by the curved lever 92 fastened to the shaft 93 and connected by the link 94 to the swinging arm 95. To the shaft 93 is also fastened the cranklever 96 connected by the bar 97 to the extension 98 of the handdever 3. The 'arm swinging about the pivot l5 lies with a rollery on the periphery of the cam 190 arranged on the shaft 2. The springs 68, 101 tend to keep the parts in the position illustrated in Fig. 7. By depressing the handlever 3 the downhold 85 is at first lowered to bear upon the shoe and also the shaft 2'is coupled. 'The revolving cam- discs 67, 100

keep the machine coupledand the last is posi illustrates the different parts just at the beginning of the rotation of the shaft'2. As the roller 66 of the bell-lever 64 snaps into the notch of the disc 67 all their original positions.

The downhold itself may be adjusted to suit different heights of lasts without altering the force with which it counteractsA the parts return in blow of the tack drivers. The presser-foot 102, see Fig. 11, is suspended in the eye of the bolt 103 screwed into the plunger 104 and adjustable in the latter by the nut 105. The plunger 104 hts with its lower part into the casing 106 the upper part of which is recessed for reception of the spring 107 as indicated by dotted lines. The spring 107 rests with one end on the plunger and with the other end on the upper wall of the casing. By turning the nut 108 the compression of the spring 107 and the power with which the last is held down is regulated. For adjusting the presser-foot the nut 105 is released and the bolt 103 screwed to the desired height and the nut again fastened. It is 'evident that by turning the nut 105 the tension of the spring is not influenced which would be the case ii" the ad justment of the height of the presser-.foot 102 were effected by turning the nut 108. Moreover turning the nut 105 is a much easier matter than that of the nut 108.

To prevent the toe-still'ener from being drawn out of place by the moving pincers there is provided apart from the ball and toesupport 86, 87 a separate support 109 for the toe-stilfener 129, Fig. 9. The support 109 is held in its outward position by a spring 110 and is pushed back by the toe-pincers swingine` inwardly. The support of the stili'ener itwhile moving inward swings about its pivot 112 away from the supported insole so that the position of the latter remains unaltered by the movement of the support 109. The supports 86, 87, 109 for the ball, the toe and the stiffener are arranged on the same carrier 111. The outward position of the stiffener support 109 is limited by the stop 118. The toe-support 87 is slotted to allow of the movement of the stilfener-support, see Fig. 10. The pivot 112 of the stilfener-support is arranged beneath the end of the toe of the last and the stiifener-support itself is lower than the support 87 to allow for the thickness of the stiffener.

The shoe being pulled-over the combined pincer and tacking apparatus return to their outward position to receive fresh tacks. It happens very often that the introduction of the tacks is prevented by chips of leather or dressings adhering to the pincers and tacking means. To remove these impediments there are provided brushes acting while the pincers swing outwardly to be loaded with fresh tacks and remaining out of contact with the pincers while the latter loaded with fresh tacks swing inward to act upon the upper.

The aforesaid tack-drivers 90 Fig. 4, move in the bores 114 into which the tacks are fed from tubes 115. The pincers are cleaned from the dirt while moving outwardly by the brushes 116 arranged in the carriers 118 pivoted at 11'(- to the pincer-car1iers 20. Springs 119 keep the .brush-carriers in their shaft into operation, a holddown for lower position. Cams 120 are pivoted to the bodies 22 and are kept by small springs in contact with the pins 128. Then the pincers swing outwardly the cams 120 meet the faces 124 of the wedges 121 and yield. lVhen on the other hand the pincers fed with tacks return into the inner position the cams 120 raise the carriers 118 with the brushes, so that the brushes cannot sweep out the fresh fed tacks from the bores 114.

The machine is very compact. The working parts are enclosed in the machine frame and are partly fixed between the side-walls 125 of the latter and partly suspended on the table 126 see Figs. 1, 2. The front and rear walls are partly removed so that all parts are easily accessible. For the same purpose the table 126 is hinged at 127 and can therefore be lifted and turned back, its upper position being limited by the stop 128. rlhe parts suspended on the table are connected to the parts fastened in the frame by readily removable pivots.

The pivots connecting the bars 18, 19, 78 with the lever 16, the evener 53 and the elbow lever 77 respectively as well as the pivot-s connecting the parts 94, 95 and the parts 58, 59 being removed, the table may be turned back.

Having described my invention, what l claim as new and desire to secure by Letters Patent of the United States is 1. In a pulling-over machine of the class described, pincers for stretching an upper and for laying its margin upon an insole, a ratchet mechanism for holding the pincers in stretching position, means for adjusting the ratchet mechanism operable during the stretching movement of the pincers, and means allowing the ratchet mechanism to move in a reverse direction while the pincers lay the margin of the upper upon the insole.

2. In a pulling-over machine of the class described, pincers for stretching au upper, and for laying its margin upon an insole, a rotatable shaft, and means for holding the pincers in position freely turnable on the shaft while moving to stretch the upper, but turning with the shaft while the pincers move to lay the margin of the upper upon the insole.

3. In a pulling-over machine of the class described, means for stretching an upper and laying its margin upon an insole, an intermittently revolving shaft for operating` the means for overlaying the edge of the stretched upper, a handle for putting this the shoe brought into contact with the shoe when the handle is moved and means coacting with the said revolving shaft for additionally pressing down the holddown.

4. In a pulling-over machine of the class described, toe pincers for stretching an upper and for laying its margin upon aninsolc,

furcation of the last-support while the toe pineers swing inwardly.

6. ln a pulling-over machine of the Class described, pinoers 'for stretching an upper and for laying its margin upon an insole, a constantly running shaft for operating the pincers during,y the stretching of the upper and an intermittently running shaft for operating the pincers during the overlayingl of the upper-margin.

IVAN RIESZ.

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