US1746412A - Shoe-stiffener-assembling press - Google Patents

Description

Feb. 11, 1930. -w. H. BAYNARD SHOE STIFFENER ASSEMBLING PRESS 3 Sheets-Sheet Filed Dec. 3, 1924 Feb. 11, 1930, w. H. BAYNARD SHOE STIFFENER ASSEMBLING PRESS Filed Dec. 3, 1924 3 Sheets-Sheet 2 Feb. 11, 1930. w. H. BAYNARD ,746,

SHOE STIFFENER ASSEMBLING PRESS Filed Dec. 3, 1924 I 3 Sheets-Sheet 5 g E NQ Il/ \\\\\\\\\\\\S\ Patented Feb. 11, 1930 A man;

WILLIAM 1-1. .BAYNARD, OF BRooxLINn, ivrnssaoriusnr rs, AssIenoR T HARRY H.

BEGKWITH, 0F BROOKLINE, MASSACHU$ETTS .SHOE-STIFFENER-ASSEMBIliNG rnnss Application filed December 3, 1924. Serial No. 753,641.

This invention relates to presses for facilitating the fixing of shoe stiffeners in shoe uppers prior to the assembly of the shoes on the lasts in the manner fully described and claimed in my application for patent Serial N 0. 619,555, filed February 17,1923, for methodof assemblingistiffeners in shoe uppers and the article produced thereby. According to this method, a shoe stiffener comprising a fibrous base saturated with thermoplastic material and skived along its rear margin is subjected along the skived portion to heat, as by placingit on a hot plate,so as to cause a local melting and exudation or frying out of the thermoplastic. While this fried out material is still hot and sticky the stiffener is placed in-position on the shoe upper sothat the sticky saturant may partially penetrate the adjacent portion thereof, either the lining, the doubler or the leather, and the parts are pressed firmly together. The exuded thermoplastic material on. being allowed to harden securely fixes the stiffener in position.

The present invention is concerned with a machine for pressing the parts together. To facilitate the assembly of the stiffener and the upper, the machineis provided with a stationary work table having a flat top on which the parts may be placed in assembled condition. Back of this table is an upper jaw member fixed at a heightwhich permits the upper with the stiffener to be moved backwardly thereunder by the operator. A lower jaw then movesupwardly toward the upper jaw so that the upper and stiffener are pressed firmlytogether. The operator may then let go of the parts and proceed to assemble another upper and stiffener on the work table in the same manner. After the pressure has been exerted on the assembled parts for the desired short time, the lower jaw of the press descends and tips to permit the upper with the stiffener fixed thereto'to drop out of the machine, there being,if d'esired, means to positively detach the parts fromthe lower face of the fixed The lower jaw then returns to substantially horizontalposit-ion, whereupon the machine is in position to permit the next upper and stiffener to be placed between the jaws by the operator.

For a more complete understanding of this companying drawings in which 1 Figure l is a side elevation of the machine, the coverfor the gear box being removed. Figure 2 is a topplan of'the machine. Figure 3 is a section through the machine on line 3-3 of Figure 1.

Figures 4, 5'and-6 aredetail sections on lines M, 55 and 6+6, respectively, of Figure 1.

Figure 7 is a frontelevation of the machine. The machine comprises a supporting frame consisting of a gear box '1 having a supporting base 2, one side of the gear box being open 1 but normally closed by means of a cover 3. Journaled in the upper portion of thegear box and extending lengthwise thereof is a shaft 5 having a worm 6 thereon positioned between spaced bearings 7 and 8 which may, if desired, be formed integral with the gear box. This worm 6 meshes with a worm gear 10 journaled on a stub shaft 11 extending through the side wall 12 of the gear box and invention, reference, may be had to the acfixed in position by any suitable means as by i a nut 13 threaded on its eccentrically arranged end which projects through the wall 12. This worm gear extends into the lower portion of the gear box beneath the upper edge of the wall portion 14 with which the cover 3 engages thus to provide an oil pocket within which the gear dips in order that oil may be carried thereby to lubricate the moving parts within the gear box.

The worm gear 10 has a laterally extended hub 15 on which is keyed'a cam 16. Cooperating with this cam cam roller 17 journaled on a stubshaft 18 fixed to a lever arm 19. This arm 19 is fulcrumed at 20, prefer against which the lower face of the jaw normally rests, being pressed into contact therewith by means of a coil spring 32 surrounding the pivot member 27 and having one end fixed in a slot 33 therein and the other end extending into contact with a stiffening rib 34 on the under face of the jaw 30. Above the jaw 30 is a mating jaw mounted in fixed position, this jaw, as shown, being integral at its rear end with the gear box and extending over the lower jaw 30.

Adjacent to the free end of the fixed aw 40 is mounted an assembling or work table 45, as shown this being provided with a flat upper face and a socket portion 46 therebeneath for the reception of a bracket arm 47 fixed to the lower portion of the gear box. As shown this bracket arm is formed as a rod which extends into a perforation in the gear box and is fixed therein by means of a set screw 48. The forward upwardly turned end 47 of this rod extends similarly into the socket portion 46 where it is fixed by set screws 49. The upper face of the assembly or work table is fixed at a level somewhat below that of the lower face of the fixed jaw 40'so that when the movable lower aw 30 is spaced therefrom a convenient distance, the upper with the stiffener thereon which has been locally heated, as hereinbefore described, may be pushed by the operator rearwardly between the two aws whereupon the lower jaw may be pushed upwardly as the cam rotates to press the upper and stifi ener with the desired degree of pressure between the fixed and movable jaws. As soon as the upper and stiffener have been gripped therebetween, the operator may release hold thereon and proceed to assemble another upper and stiffener in the same manner on the table 45. The cam 16 is provided with a dwell 55 so that when the roller 17 rides thereon, the movable jaw is held up in work-clamping position, this dwell being of sufficient length to cause the pressure to be exerted for the desired length of time. As the portion 55 of the cam rides out from beneath the roller 17, the arm 19 is permitted to fall by its own and the weight of the jaw 30, thus permitting the lower jaw to fall away from the upper jaw to release the work. As it continues to drop provision is made for tilting the lower 'aw against the tension of the spring 32 in order that the assembled upper and stiffener may fall clear therefrom and at the same time, if desired, the work may be positively pushed away from the upper fixed jaw so as to drop freely from the machine at the completion of the pressing operation.

The tilting of the lower jaw is accomplished by means of a finger lever which is pivoted on a. post 61 extending forwardly from the gear box beneath the fixed jaw 40. This finger 60 has an upwardly projecting portion 62 against which the movable jaw 30 impinges as it falls away from the fixed jaw, the impingement taking place at one side of the axis of its pivotal connection with the arm portion 26. Continued downward motion of the movable jaw, therefore, causes it to be rocked about its pivot, the arm 60 also turning about its own pivot as the downward motion of the movable jaw continues until the parts reach the position shown in dotted lines in Figure 4. At the same time the work may be freed from the upper clampingjaw by means of stripper pins 70. These stripper pins ride in suitable perforations through the clamping portion of the upper jaw and are normally held raised above the lower face thereof by means such as leaf springs 71, each fixed at one end to the upper face of the platen portion 72 of the fixed jaw 40 and having a slotted end 73 extending under the head 74 at the upper end of the stripper pin. Riding on the heads of these pins is a plunger plate 7 5 positioned within an opening 76 in a web 77 forming part of the fixed jaw. This plate 75 is fixed to the lower end of a rod 80 which is slidable through an opening 81 in the jaw member 40, the upper end of this rod being bent rearwardly and resting in a groove in the upper face of a lug 83 projecting from the upper face of the gear box. This rod 80 has extending thereover a yoke member 84 having downwardly extending legs 85 and 86. The leg 86 is merely guided for vertical movement through a guide opening 87 in the upper face of the gear box while the leg 85 extends into the gear box through a similar opening 88 and its lower end is seated in a depression 89 in the upper face of the arm 19. Surrounding this leg 85 is a coil spring 90 which reacts between the upper wall of the gear box and a collar 92 fixed to the leg 85 by which means the yoke member 84 is urged downwardly as far as is permitted by the engagement of the lower end of the leg 85 on the arm 19. As the arm 19 swings downwardly permitting the movable jaw 30 to move downwardly and causing it to tilt, the yoke 84 is also permitted to move clownwardly, the spring 90 causing it to engage above the rod 80, depressing the same and causing the stripper pins to be projected through the lower face of the fixed aw member 40. By this means the work is detached from the upper jaw member so that it may fall freely from the machine. Adjustable stop screws 95 threaded through the upper portion of the fixed jaw 40 may be used to limit the upward movement of the block 7 5.

The pressed work having thus been removed from the machine, a higher portion 98 of the cam comes beneath the cam roller, causing the arm 19 to be raised sufliciently to permit the lower movable jaw to approach the upper fixed aw and to again resume its horizontal position, the weight of the lever 60 then returning it to the position shown insolid lines in Figure tin which its lower end engages a stop pin 100. As soon as this position has been reached by the lower jawmember another dwell portion 99 of the cam comes into cooperative relation with the camroll, thus permitting this jaw to remain in this position a sufficient length of time for the operator to push the upper and stiffener assembled on the plate between the jaw members. At the end of the dwell the cam acts to raise the cam follower 19 to effect the pressing of the upper and stiffener together as has been heretofore described, the cycle of operations be ing automatically repeated as long as the machine is running. It is intended that the machine should run continuously while in operation, the operator pushing the upper and stiffener previously assembled on the table 15 as shown in dotted lines in Figure 2 between the jaws during the dwell when the movable jaw is positioned spaced from the upper jaw, but.with itsupper face substantially horizontal. As soon as the jaw has been moved upwardly to clamp the parts, the operator pays no more attention to the work but starts the assembling of another upper and stiffener which may be completed by the time the work pressed between the jaws has been pressed and removed and the movable jaw has resumed its position ready for the insertion of the next upper and stiffener. As shown, therefore, the shaft 5 is driven by a belt pulley 105 which may have a fly wheel portion 106 this belt pulley being clutched to the shaft by means of a clutch 107 slidable sired pressure.

axially of the shaft, but keyed thereto by the key 108, this clutch being shifted into and out of clutching position along the shaft by means of a shipper 109 carried by a reciprocatory shaft 110 mounted in bearings 111 extending outwardly from the cover 3. This rod 110 is readily accessible to the operator who may start andstop the machine as desired, though as above stated in the normal operation the machine runs continuously.

By turning the stub shaft 11 and the fulcrum shaft 20, the extent of closing movement of the jaws may be regulated according to the thickness of the material and the de- Having thus described an embodiment of this invention, it should be evident to those skilled in the art that various changes and modifications might be made therein without departingfrom its spirit or scope as defined by the appended claims.

I claim:

1. A machine of the class described comprising a pair of jaws between which work may be clamped, means for moving said jaws relatively toward each other to clamp work therebetween and for then separating said jaws, means for turning one of said jaws during such separation to permit the work to fall therefrom, and means for detaching the workfrom the otherof said jaws.

. 2. A machine of the class described comprising a. pair of jaws between which work may be clamped means for moving saidjaws relatively toward each other to clamp work therebetween and for then separating said jaws, means for turning one of said jaws during such separation to permit the work to fall therefrom, and means acting independently of said other jaw for returning the turned jaw to its former position assaid jaws move relatively toward each other. j p i 3. Amachine'of theclass described comprising a pairof jaws between which work maybe clamped, means for moving said jaws relatively toward each other to clamp work therebetween and forthen separating said jaws, meansfor turning one of said jaws during such separation to permit the work to fall therefrom, means for detaching the work from the other of said jaws, and means for returning said one jaw toits former position as saidjaws move relativelyfoward each other.

machine of the class "described comprising a fixed jaw, a jaw movable toward and fromlsaid fixed jaw, an arm to which said movable jaw is pivoted, means for moving said arm to move said jaw, and means acting positively on themovement of said 'movable jaw from said fixed jaw for tilting said movablejjawon itspivot; j j 5. machineof. the class described com prising a fixed j aw, a j aw movable toward and froinsaid fixed jaw, an arm to which said movable jaw is pivoted, means for moving saidarm to move said movable jaw",ja stop on said arm, means tending to hold said movablejaw in contactwith said stop,and a finger positioned adjacent to the path of movement of said movable jaw and against which said'movablefjaw impinges eccentric,

to its pivotas saidmovable jaw moves from said fixedjawito cause said movable jaw to t1 l t out of contact with said stop. 1

f6. A ma'chin e of the class described comjaw, a jaw movable toward prising a fixed and from said fixed j aw,a lever arm carrying said movable jaw,an adjustable fulcrum for said lever arm, a shaft having an angularly adjustable eccentric bearing portion, a cam rotatable on said bearing portion, a cam follower fixed to said lever arm, and means for rotating said cam.

7. A machine of the'class described comprising a fixed jaw, a movable jaw, pins carried by said fixed jaw and projectable beyond the work-engaging face thereof, means for resiliently holding said pins retracted, means for moving said movable jaw toward and from said fixed jaw, and means actuated by the movement of said movable jaw from said fixed jaw for projecting said pins.

prising a fixed jaw, a-jaw reciprocatory toward and from said fixed j-aw, anv arm: to which said movable jaw is pivoted, means for moving said arm to move said jaw, means 5 acting on the movement of said movable jaw from said fixed jaw for tilting the movable jaw on its pivot, and means acting onthe movement of said arm for stripping the work from said fixed jaw.

w 9. A machine of the class described, comprising an upper jaw, a lower 'aw for receiving work reciprocating into an out oi clamping engagement with the upper jaw, means for tilting the lower jaw to permit the work 15 to fall therefrom while it moves out of clamp ing engagement with said upper jaw, means for restoring. said lower jaw to non-tilting position as it moves into clamping enga ement with said upper jaw, and means or 29 reci rocating said lower jaw acting to cause dwe ls in the motion offsaid jaw when it is in non-tilting, work-receiving position and in work-clam ing position.

10. A machine of the class described, comg prising a fixed upper jaw and a movable ower aw between which the work may be presse mechanism for moving the lower jaw toward and from the u per jaw, means for effecting the automatic. ateral tilting of the an lower j aw, and means operating through the: upper 'aw for automatically disengaging the work t erefrom,

11. A' machine'of the class described, com.- prising a fixed 'aw andamovable,non-yieldan ing lower jaw etween which thegwork may be pressed, mechanism for moving the lower jaw about an'axis toward and from the work, and means for moving said lower jaw about an axis transverse to this first-mentioned axis.

i 12. A machine of the class described, com"- prising, a fixed 'aw and a movable, non-yielding lower jaw etween which. the work. may 'be pressed, mechanism for moving the lower jaw about an axis toward and from the work, and means for varying. the limits ofthe path. of movementof said movable jaw in relation to the fixed jaw, to compensate for work of difierent thicknesses or to vary the pressure thereon. a I m In testimony whereof I have affixed my signature.

WILLIAM H. BAYNARD-

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