US1720219A - Pulling-over machine - Google Patents

Description

July 9, 1929. E N 1.720.219

PULLING OVER MACHINE Filed Mifich 23, 1928 3 Sheets-Sheet l 9, 1929. B. JOR'GENSEN I 1,720,219

PULLING OVER MACHINE Filed March 23, 1928 3 Sheets-Sheet 2 y 1929- B. JORGENSEN 1.720.219

PULLING OVER MACHINE Filed March 25, 1928 3 Sheets-Sheet 5 Patented July 9, 1929.

UNITED STATES PATENT OFFICE.

BERNHARDT J ORGENSEN, OF BEVERLY, MASSACHUSETTS, ASSIGNOR TO UNITED SHOE MACHINERY CORPORATION, OF PATERSON, NEW JERSEY, A CORPORATION OF NEW JERSEY.

PULLING-OVER MACHINE Application filed March 2a, 1928. Serial No. 204,250.

This invention relates to machines for use in the manufacture of boots and shoes for pulling uppers over lasts, and has more particular reference to the operation and control in such machines of means for laying the margin of the upper inwardly over the bottom of the last and for fastening it in overlaid position.

Pulling-over machines of a well-known type, illustrated in United States Letters Patent No. 1,029,387, granted on June 11, 1912, upon an application of R. F. McFeely, are provided with front and side arms which are movable toward and from the shoe and carry wipers for Wiping the upper inwardly over the bottom of the last and also means for fastening the upper in overwiped position. Associated with each arm is an operating member which acts to move the arm toward the shoe and thereby to wipe the margin of the upper over the sole or insole and to position the fastening means in proper relation to the shoe, and then by further movement while the arm is stationary,

" as permitted by yieldable connections between the member and the arm, serves to actuate the fastening means by releasing a spring-operated driver bar. The present invention provides improved means for controlling such arms, to insure that their overwiping movements will be completed prior to the upper-fastening operation and that they will then be maintained in proper relation to the shoe for the driving of the r fastening or fastenings. For the purpose of such control of the front arm, the machine herein shown has a novel construction and arrangement of operating connections between the arm and its operating member, including at each side of the arm a springcontrolled rotatable element arranged to transmit movement from the operating memher to the arm Without turning until the arm arrives at the limit of its movement toward the shoe and then to turn against the resistance of its controlling spring in response to the further movement of the operating member while holding the arm through the increasing force of the spring in proper position for the upper-fastening operation. As herein illustrated, for a purpose more fully hereinafter explained, each spring is arranged to extend laterally of the arm at the side thereof, and the rotatable element, shown as a gear sector, serves as effective means to transmit substantially the full force of the spring to a rack member connected to the arm and movable in directions at right angles to the direction of the force applied to said element by the spring. While the construction shown, for the sake of greater efiiciency and freedom from strain of the parts, thus comprises duplicate sets of connections at the opposite sides of the front arm, it will be understood that the invention is not limited to such a double arrangement.

For controlling each of the side arms, the

machine herein shown is further provided with a novel construction and arrangementof mechanism including a slide connected to the arm and spring means arranged to bear on the slide and to appl its force thereto in a direction substantial parallel to the direction of movement of the slide, this construction affording direct and effective means for imparting to the arm its inward movement and for holdin it in proper relation to the shoe for the astening operation without undue strain or friction, as more particularly hereinafter explained.

The aboveand other features of theinven- I tion, including various novel details of construction and combinations of parts, will now be more particularly described by reference to the accompanying drawings and pointed out in the claims.

In the drawings,

Fig. 1 is a view in side elevation of a portion of a machine in'which the invention isembodied, showing the front arm and its controlling means;

Fig. 2 is a view approximately in front elevation, showing one of the side arms and its controlling means;

,Fig. 3 is a view approximately in plan,

with parts in section, showing the control-- ling means for the front and side arms; and

Fig. 4 shows a portion of the structure of Fig. 3 with the parts differently positioned.

The invention is illustrated in its application to the well-known type of pulling-over machine shown and described in the abovementioned Letters Patent, and accordingly only such parts of the machine as it is necessary to refer to for an understanding of the invention are shown and will be described in detail. The machine includes a toe gripper 10 (Fig. 1) and opposite side grippers one of. which is shown at 12 in Fig. 2. These grippers are operated by power in the first stage of the cycle of operations of the machine to'grip and to pull an upper "over a' last positioned by a sole rest 14, after which the machine comes to a stop with the upper held under tension to permit inspection of the work The-toe gripper is operated by an updraw lever 16, and this lever. carries well-known mechanism includmg hand lever. 18 atits frontend by the use-of which the. gripper may be-adjustedmanuallyin relation to the-edge of theupper while theumachine is thus ,at rest, ()p-' portunity is afforded also for. other. adjusts ments whichneed not be mentioned in detail. .VVhen the machine is again started,-

oppositevsideclamp arms, one of which is shown at 20' in F 1g.2, are swung inwardly toward thesides of the shoe, each of these arms having thereon a pad22 mounted in a holder 24 and arranged to engage the side of the forepart of the shoe near the edge of the last bottom andanother clam-p member 26z.-for supporting theshoe nearer the top of the forepart. Thereafterthe .toe and side grippers are swung inwardly and tripped to. release the upper and the margin of the. upper is laid inwardly .over the insole andlfastenedatl the end of the toe and the sides of the forepart.

' The overlaying and fasteningdevices for the end of the toe are carried by a front arm 28 mounted forrswin-ging movement lengthwise ofthe shoe and comprise, in the constructionshown, a wiper 30 and a tack earlier application of mine may be utilized.

The overlaying and fastening-devices for the opposite sides of the forepart. are carried by side arms 34, one of which is shown in F1 2, mountedifor swinging movements laterally of the shoe, and comprise on each arm' one or more=wipers 3 6- and a tack driver bar 38. The driver bars'32wand 38 are operated by springs (not shown) andarecontrolled by mechanism hereinafter described which is also utilized .to impartv to? the arms 28 and 34 their swinging'movements. For limiting the inward-movement of the front arm 28 toward the shoe there is mounted on the'arnr anabutment 40 'for'engaging the-end ofthe toe,--a-nd for similarly limiting thejinward movements of the side arms 34 there are provided on these arms. stopmembers 42for engagingthe clamp; pad holders. 24.

The means for swinging the frontand side arms toward and from the :shoe and for controlling the tack. driver bars is in many respects similar to the construction shown Jon the carrier.

inthe above-mentioned Letters Patent No. 1,029,387. Mounted for swinging movement about a shaft 44 (Fig. 3) is a carrier 46 on which is slidingly mounted a bar 48 engaged and operated by gear teeth 50 on the shaft 44. At its front end'the bar 48 is connected to the arm 28 by means hereinafter described, and has thereon projections 52 arranged to extend under a lug 54 fast on the front driver bar 32'and thus to hold the driver bar normally upraised a ainst the resistance of its operating, spring. It will be understood that bycon-tinued rearward movement of the bar 48after the. movement of the arm 28 has been stopped. by engagement of the abutment 40 with the shoe the projections 52 are'withdrawn from under the lug 54 and the driver bar 32 is thus released to the action of its spring. 1 There are also provided mechanisms operated by the bar 48 for imparting swinging movements to the side arms 34 and for controlling the side driver bars 88. For this purpose there are pivotally mounted on the carrier 46 gear sectors 56 which are engaged and operated by rack teeth on the sides of the bar 48 and are also in operative engagement with rack teeth formed on slides 58 These slides are connected to the arms 34 by means hereinafter described, and have projections 59 (Fig. 4) arranged to extend under lugs 60 fast on the driver bars 38 to hold these driver bars in upraised position. It will be understood that the side driver bars 38 are released at substantially the same time as the front driver bar 32 by continued movement of the slides 58 when the inward movements of the side arms are stopped by engagement of the members 42 with the pad holders 24. Thereafter,

. in the return of the. parts of the machine to starting positions, the carrier 46 with the parts mounted thereon is swung downwardly about the shaft 44 by its operating means (fully describedv in Letters Patent No. 1,029,387 hereinbefore mentioned), reverse outward movements are imparted to the bar 48 and the slides 58 to engage the projections 52 and 59- respectively with the front and side arms and thus to swing these arms outwardly from the shoe, and the carrier 46 is swung upwardly again to cause these projections to raise the driver bars against the resistance of their springs.

For connecting the bar. 48 to the front arm 28 there are provided for purposes of the present invention, two casings 62 secured respectively to opposite sides of the bar 48 to move therewith. Slid'ingly mounted in each of these casings in a guideway ertending lengthwise of the bar 48 is a rack bar 64 provided near its front end with a pin 66 swivelcd in a block 68 which is movable along a guideway 70 extending lengthwise of the front arm 28 to maintain an operative connection with the arm in the swinging movements ofthe carrier 46. Pivoted at 72 in each of the casings 62 is a. gear sector 74 which is in engagement with the teeth on the rack bar 64 and is provided with a finger 7 6 engaged by a plunger 7 8 movable laterally of the front arm 28 in the casing 62 and controlled by a spring 80. It will be seen that the tendency of the springs 80, which extend laterally of the arm 28 at the sides thereof and act in directions at right angles to the rack bars 64, is to swing the front arm 28 rearwardly toward the front end of the bar 48, so that when this bar receives its rearward movement the arm 28 is carried with it to force the wiper 30 over theshoe bottom and to position the arm in proper relation to the shoe for the tackdriving operation. When the movement of the arm 28 is stopped by engagement of the member with the shoe, the rack bars 64 become stationary, and as the movement of the bar 48 with its casings 62 continues, these rack bars cause thegear sectors 7 4 to turn against the resistance of the springs 80, as illustrated in Fig. 4. It will be understood thatthe initial force of these springs is such as to cause the arm 28 to be swung by the bar 48 to the limit of movement determined by the member 40 without any turning movement of the gear sectors 74, whatever may be the resistance of the upper materials to the action of the wiper 30, there being provision for adjusting the stress of the springs by the turning of threaded abutments 82 at their outer ends; and it will also be understood that the further compression of the springs resulting from the continued movement of the bar 48 whereby the tack driver bar 32 is released affords increased insurance that the tack-driving means will be maintained in proper relation to the shoe until the upper is fastened. It will be noted that in all positions of the parts the pivoted gear sectors 74 serve as effective means to transmit substantially the full force of the springs to the front arm 28 through the rack bars 64. An advantageous characteristic of the arrangement whereby the springs 80 and the portions of the casings 62 in which they are mounted thus extend in directions laterally of the front arm is that they are not in the way of the operator in making any manual movements of the levers 16 and 18 that may be necessary, as will be evident by reference to Fig. 1.

- For connecting the slides 58 to the side arms 34 there are mounted in guideways in these slides additional slides 84 having balland-socket connections with blocks 86 slidingly mounted in guideways extending lengthwise of the side arms to maintain operative relation between the slides 84 and these arms in the swinging movements of the carrier 46. Fast on each of the slides 58 is a bracket 88 which carries a springcontrolled plunger 90 arranged to bear on the outer end of the slide 84 and to apply its force in a direction substantially parallel to the direction of the movement of this slide. Operating on the plunger 90 is a spring 92 the stress of which may be adjusted by a threaded abutment member 94. It will be seen that the arrangement is such that substantially the entire force of the spring 92 is applied to the slide 84 to move the side arm inwardly when the slide 58 receives its inward movement, and that the spring is further compressed to insure that the side arm will be held in proper relation to the shoe for the driving of the tacks at the time when the slide 58 moves relatively to the arm to release the driver bar 38, as illustrated in Fig. 4. An advantageous characteristic/of the arrangement whereby the plunger 90 bears on the slide 84, as distinguished, for example, from bearing on the side arm 34, is that there is no relative sliding movement with resulting friction between the plunger and the slide at the time when the swinging movements of the carrier 46 take place near the end of the cycle, since the plunger and the slide both move with the carrier. Further to assist in reducing friction, the movement of each plunger 90 is preferably so limited, by engagement of an enlarged head 96 thereon with a shoulder on the bracket 88, that in the upward swinging movement of the carrier 46 with the projection 59 of the slide 58 in engagement with the inner face of the side arm 34 near the end of the cycle, as hereinbefore explained, the end of the plunger will be spaced slightly from the slide84, as shown in Fig. 3, thus rendering the spring 92 inoperative to press the side arm against the projection 59 at that time.

The manner of operation of the mechanism' shown having been fully explained in connection with the description of the structural features, no further explanation is necessary for an understanding of the invention.

Having described the invention, what I claim as new and desire to secure by Letters Patent of the United States is 1. In a machine of the class described, the combination with means for pulling an upper over a last, of an arm movable inwardly toward the last and having thereon means operative in such inward movement to lay the upper over the bottom of the last and also means for thereafter fastening the upper in overlaid position, a member movable to operate said arm and further movable after the arm has arrived at the limit of its inward movement to actuate the fastening means, and connections between said member and the arm comprising a rotatable element arranged to transmit movement from said member 'to the arm without turning until the arm arrives at the limit of its inward movement and then to turn against yielding resistancein response to the further movement of said member while holding the arm in proper relation to the shoe for the fastening operation.

2. In a machine of the class described, the combination with means for pulling an upper over a last, of an arm movable inwardly toward the last and having thereon means operative "insuch inward movement to lay the upper over the bottom of the last and. also means for thereafter fastening the upper in overlaid position, a member movable to ope 'ate said arm and further movable after the arm has arrived at the limit of its inward movement to actuate the fastening means, and connections between said member and the arm comprising a. spring and a rack and gear mechanism cont-rolled by said spring and arranged to transmit movement from said member to the arm until the arm arrives at the limit of its inward movement and then to act with increasing force in response to the further movement of said member to hold the arm in proper relation to the shoe for the fastening operation.

3. In a machine of the class described, the combination with means for pulling an upper over a last, of an arm movable inwardly toward the last and having thereon means operative in such inward movement to lay the upper over thebottom of the last and also means for thereafterfastening the upper in overlaid position, amember movable to operate said arm and further movable afte'rthe' arm has arrived at the limit of its inward movement to actuate the fastening means, and connections between said member and the arm comprising a rack bar movable with the arm and a spring-controlled gear sector engaging said rack bar and movable with said member, said gear sector being toward the last and having thereon means operative in such inward movement to lay the upper over the bottom of the last and also means for thereafter fastening the'upper in overlaid position, a member movable to operate said arm and further movable after the arm has arrived at the limit of its inward movement to actuate the fastening means, an d connections between-said member and the arm comprising a rack bar movable with the arm, a spring carried'by said member and extending laterally of the arm to apply its force in a direction substantially at right angles to the rack bar, and a rotatable gear element also carried by said member for transmitting the force of the spring to the rack bar, said gear element being arranged to act without turning to transmit movement from said member to the arm until the arm arrives at the limit of its inward movement and then to turn against the resistance of the spring in response to the further movement of said member while holding the arm in proper relation to the shoe for the fastening operation.

5. In a machine of the class described, the combination with means for pulling an upper over a last, of an arm movable inwardly toward the last and having thereon means operative in such inward movement to lay the upper over the bottom of the last and also means for thereafter fastening the upper in'overlaid position, a member movable to operate said arm and further movable after the arm has arrived at the limit of its inward movement to actuate the fastening means, and connections between said member and the arm comprising a coil spring extending laterally of the arm at the side thereof and a rotatable element connected to the arm and arranged to turn against the resistance of said spring in response to the turther movement of said member after the arm has arrived at the limit of its inward movement while holding the arm through the force of the spring in proper relation to theshoe for the fastening operation.

6. In a machine of the class described, the combination with means for pulling an upper over a last, of an arm movable inwardly toward the last and having thereon means operative in such inward movement to lay the upper over the bottom of the last and also means for thereafter fastening the upper in overlaid position, a member connected to said arm for moving it inwardly, another member movable to operate said first member and further movable relatively to the latter to actuate the fastening means, and yieldable means carried by said other member for transmitting operative movement to the first member, said yieldable means comprising a spring and a'rotatable element connected to said first member and arranged to turn against the resistance of said spring in response to themovement of said other member relatively to the first member to hold the arm in proper relation to the shoefor the fastening operation.

7. In. a machine of the class described, the combination with means for pulling an upper over a last, of an arm movable inwardly toward the last and having thereon means operative in such inward movement to lay the upper over the bottom of the last and also means for thereafter fastening the upper in overlaid position, a rack bar connected to said arm for moving it mwa-rdly, a member movable to operate said rack bar and further movable relatively to the latter to actuate the fastening means, and connections between said member and the rack bar comprising a gear element carried by said member and engaging the rack bar and a spring cont-rolling said gear element, said gear element being mounted for turning movement against the resistance of its spring in response to the movement of said member relatively to the rack bar to hold the arm with increased force in proper relation to the shoe for the fastening operation.

8. In a machine of the class described, the combination with means for pulling an upper over a last, of an arm movable inwardly toward the last and having thereon means operative in such inward movement to lay the upper over the bottom of the last and also means for thereafter fastening the upper in overlaid position, a pair of rack bars connected to said arm at opposite sides of the latter for moving it inwardly, a member movable to operate said rack bars and further movable relatively to the latter to actu ate the fastening means, coil springs carried by said member and extending laterally of the arm at the opposite sides thereof to apply their force in directions substantially at right angles to the rack bars, and gear elements also carried by said member for transmitting the force of said springs to the rack bars, said gear elements being mounted for turning movements against the resistance of said springs in response to the movement of said member relatively to the rack bars for holding the arm with increased force in proper relation to the shoe at the time of the actuation of the fastening means.

9. In a machine of the class described, the combination with means for pulling an upper over a last, of an arm movable inwardly toward the last and having thereon means operative in such inward movement to lay the upper over the bottom of the last and also means for thereafter fastening the upper in overlaid position, a member connected to said arm for moving it inwardly, another member movable to operate said first-named member and further movable relatively to the latter to actuate the fastening means, and spring means arranged to bear on said first member for transmitting movement thereto from the other member and to be subjected to stress by the relative movement of said members, said spring means being arranged to apply its force to the first member in a direction substantially parallel to the direction of movement of the latter for holding the arm against outward movement at the time of actuation of the fastening means.

10. In a machine of the class described, the combination with means for pulling an upper over a last, of an arm movable inwardly toward the last and having thereon means operative in such inward movement to lay the upper over the bottom of the last and also means for thereafter fastening the upper in overlaid position, a member connected to said arm for moving it inwardly, another member movable to operate said first-named member and further movable relatively to the latter to actuate the fastening means, and a spring plunger carried by said other member for operating the first member, said spring plunger being arranged to bear on said first member and to yield in a direction substantially parallel to the direction of movement of the latter in response to the relative movement of said members for holding the arm against outward movement at the time of actuation of the fastening means.

11. In a machine of the class described, the combination with means for pulling an upper over a last, of an arm movable in wardly toward the last and having thereon means operative in such inward movement to lay the upper over the bottom of the last and also means for thereafter fastening the upper in overlaid position, a slide connected to said arm for moving it inwardly, another slide movable to operate the first-named slide and further movable relatively to the latter to actuate the fastening means, and spring means carried by said other slide and arranged to bear on the outer end of the first slide to operate the latter, said spring means being yieldable in a direction substantially parallel to the direction of movement of the first-named slide for holding the arm against outward movement at the time of actuation of the fastening means.

In testimony whereof I have signed myname to this specification.

BERNHARDT J ORGENSEN.

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