US1400695A - Heel-building machine - Google Patents

Description

J. H. POPE.

- HEEL BUILDING MACHINE.

APPLICATION FILED MAY IB, 1918.

Patented Dec. 2o, 1921.

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@Athi JOSEPH H. POPE, 0F HAMILTON, MASSACHUSETTS, ASSIGNOR T0 UNITED SHOE 'MACHINERY CORPORATION, 0F PATERSON, NEW JERSEY, A CORORATION OF NEW JERSEY.

HEEL-BUILDING- MACHINE.

Specication'of Letters Patent. Pgitfgmijed D943, 20, 1921,

Application filed May 16, 1918. SerialvNo. 235,000.

To @ZZ whom t may con/cern:

Be it known that I, Josnrrr H. Porn, a citizen of the United States, residing at Hamilton, in the county ofEsseX and State of Massachusetts, have invented certain 1fmprovements in HeelBuilding Machines, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the drawings indicating like parts in the several figures.

This invention relates to heel building machines and has particular reference to means for controlling the alinement of the lifts of a heel blank, the application of pressure to the blank while a heel building nail is being driven, and the provision of means for insuring the safety of the operative during the operation of the machine upon the blank.

in machines of the general type to which this invention is applicable, a `contractile heel form is provided. Thile the form is expanded a series of lifts sufficient for a heel blank is piled into the form, which is then contracted to engage the lateral surface of the heel, aline the lifts properly and maintain them in alinement while the blank is subjected to pressure and a nail driven through it to secure the lifts together. A typical example of this style of heel building machine is illustrated and described in Patent No. 1,056,720, granted March 18, 1913, Tripp.

In machines of the type referred to the mechanism foi` contracting the form jaws upon the lateral surface of the heel is operated by a foot treadle independently of the pressure and nailing mechanism, and it has been possible to apply pressure to the pile of lifts and to drive one or more nails through them while the form jaws were open or out of engagement with the heel. This often resulted in causing the lifts to slide one upon another with the consequent distortion of the heel and was particularly troublesome when building heels with one or more pieced lifts where the pieces were likely to become separated. 1n the machine of the above-mentioned patent,V also, the starting of the power mechanism is e'ected by drawing forward the arm carrying the presser foot and, the machine having been started, it has been possible at times for the arm to fall backward sutliciently before the presser foot engaged the heel so that one or more of the heel building nails would not engage and clench upon the presser foot. As a further incident of the operation of these machines, it has been possible to cause the depression of the presser foot upon the heel before the operative had removed her fingers from the mold, with the consequent possibility of personal injury.y

The object of the present invention is to overcome the diiiiculties above outlined, and to this end a feature of the invention consists in the provision in a heel building machine having a contractile heel form and mechanism for performing an operation upon the heel, of automatic means for con-` tracting the form upon the lateral surface of the heel, preferably yieldingly, prior to the application ofy the vertical pressure which forces the lifts into intimate contact with each other, in combination with separatemeans for opening, or expanding the form. This automatic means may conveniently take the form ofa spring or equiva* lent yielding device operating to close the jaws of the heel form and controlled by a cam or other element of the power mechanism ofthe machine'in such a way that the heel form is maintained in expanded or open condition while the lifts are being introduced into it and' is automatically closed upon the heel to aline the lifts after lthe machine is started and prior to the engagement of the presser foot with the topmost lift. By reason of the yielding contraction of the form, it operates to aline the lifts with certainty and accuracy,regardless of` variations in their sizes.

A further feature of the invention consists in the provision of means for preventing movement of the presser foot away from over the path of the heel building nail or nails after' the machine is started and before the nail or nails have Vbeen driven and clenched.' 1n a practical form of the invention this' feature may be embodied ina latch constructed and, arranged' to permit the presser foot to be drawn forward into operative position over the heel andthen to lock and retain it in that position until it has descended to exert pressure on the heel while the nails are driven, whereupon the operative position; and

backto inoperative position.

A still Vfurther 'feature of the invention consists in lasafety device comprising a presser.Y foot or platen laterally movable over andV away from the receptacle containing the heel and so constructed and arranged that in its movement into operative position over the heel it will engage and push away the fingers of the operative in case they have notbeen removed in time, thus avoiding any danger of her fingers being caught and injured.

These and other` featuresof the invention Vwill best be appreciated and understood from the following detailed description of one embodiment thereof when read in connection with the accompanying drawings, in which, j

Figure 1 is aperspective view of the invention appliedto a well-known form. of heel building machine; f

Fig.; 2 isa side elevation partly in section ofthe mechanism shown in Fig. l;

Fig. V8 is a view of a detail of the mechanismfor locking the pressure foot arm in Fig. 4 is a'sectional view of the Ysafety mechanismof the presser foot.

The invention will'be described as embodied in a machine constructed like that shown in Patent No. 1,056,720, above re- Vferred to, Vand reference may be had to that patent for a full disclosure of the details of construction of those features of a heel building machine Vwhich are not novel, per

Vwith the present inventor. I Y

eferring, now yto the drawings, 10 indicatesV the frameand 12 the table of aheel building machine. Mounted upon the table 12 is a dieand formholder 14v insuitably formed guiding grooves in which is secured a nailing die 16 having the usual driver andV nail guiding holes 18 and, upon the upper surface Yof which is supported a con tractile heel receptacle or form comprising a breast member 20 and side jaws 22, 24. `The jaws 22, 24 are carried by the ends of armsv 26,28 pivoted, respectively at 30, 32

to themember 14. The varm 26y is provided Vwithanextension 33 and a spring 34 ccnf Iiect'edjat'one' end tothe arm 83' and at'the Vother end to a stationary bracket 36 bolted tothe Ymachine frame tendsV normally to swing the jaws which are interconnected by a pin-and slot as lshown in Patent No. 1,148,716, granted August 3, 1915 upon the application of J.. H. Richardson, in a direction to.` close the jaws upon the'lateral surface of the heel to aline the lifts preparatory tothe driving ofthe heel building nail.

s VV"'.he'iouter end of theeXtension 83' is conV fnected by an adjustable link 42 to a cam 1 Vlever 44 which inovegiabout astationary pivot 46 and is actuated to expand or open the forming jaws in opposition to the spring 84'to facilitate the introduction of the lifts by a Vcam 48 mounted upon the main driving shaft 49 of the. heel building machine.

A beam or arm` 50 corresponding to the beam 122 of Patent No. 1,056,7 20, previously mentioned, carries a presser foot or platen 52 forengaging the upper face of the heel and `pressing the lifts together. As in the said patent, the act of swinging the presser foot over the heel in the form automatically releases the starting clutch and causes the presser foot to be lowered by power and the heel building nail or nails to be driven. The

mechanism for performing these operations l is fully'shown and described in theY said patent and a detailed description thereof need not be repeated here.

Cam 48 is so disposed upon the shaft 49 that when the machine stops the cam is in engagement with the cam arm 44 and the form jaws 22, 24 are held open to permit the easy and rapid introduction of lifts into the form. l/Vhen the requisite number of liftsV driving mechanism. In the continued operation of the machine the presser foot 52 carried by the arm 50 descends to apply pres sure to the blank and then the heel building nail or nails are driven, their points, if they Vprotrude through the upper surface of the blank, being clenched upon the pressure foot. v

Ideretofore, in machinesof this type it has sometimes occurred that the'operative would draw the arm 50 forward quickly and immediately release it. If the arm were drawn forward somewhat violently it would sometimes rebound rearwardly and although the power mechanism of the machine was started, theV presser foot would have moved sufliciently rearwardly by the time it had engaged the heel so that one Vor more of the heel building nails would escape engagement Y with it and would not be properly clenched.

scribed.

VA pin 54 the machine..V A spring 58 heldunder tension by screw 60, presses against the pin 54,V

holding it yieldingly inwardly Vwith its end in the path of a slide'62, mounted for movefment in a vertical: grcover64 formed in the is slidably mounted in'a boss 56V secured to, or forming part of, the frame of :To overcome this possibility, I have pro-V vided Vmechanism which will Vnowbe dearm 50. A spring 66 attached to the slide 62 and to a pin 68 inserted in the arm 50 tends to draw the slide 62 upwardly until the lower end ot. a slot 70 formed in the slide engages a screw 72 which is likewise inserted in the arm 50. A beveled tace 74 is formed upon the slide in proper position to engage the yielding pin 54 in the forward movement of the arm 50. The relation of the parts, however, is such that when the arm 50 has reached the limit ot its forward movement, the pin 54- snaps in behind the slide 62, thus holding or locking the arm 50 positively against falling backward and maintaining the presser foot 52 in alinement with the nail drivers.

As the arm 50 descends during the operation ci the machine a forwardly extending hook 76 upon the lower end ot the slide 62 engages and passes bythe hook upon. the upper end oi a dog 78 pivoted at 80 to the machine trame and yieldingly drawn rearwardly by a spring 82. Pin 84:, which serves as a means for connecting the spring'82 to the dog 78, also engages a surface 86 formed upon the frame oi' the machine which acts as a stop to limit the rearward movement or the dog. In the operation or' the machine the arm 50 descends sun'iciently to cause the hook 76 to pass by the hook on the dog 78, which then snaps in over the hook 76, as shown in Fig. 3. its the arm 50 again rises, the dog 78 prevents the slide 62 from rising, l'iolding it in such a position that its upper surface may move backward beneath the end oit the pin 511, as the arm 50 swings backward. By the time the arm has reached Yits position of rest, asshown in Fig. 1, the slide 62 has been released from the hook on the dog 78, the rearward movement of which is limited by the pin 84 and the surface 86, and the upper end oft' the slide has passed :trom beneath the pin 54:, permitting the spring 66 to restore the slide to its initial position ready for the next operation. lt will be apparent that no matter how suddenly or violently the arm 50 is drawn forward, it will be impossible for the presser 'foot 52 to move backwardly out of alinement with the nail drivers until after the nails have been driven and the operation of the machine upon the heel blank has been completed.

Referring now to Fig. at, the presser ioot 52 has an upwardly projecting stem 90 arranged to slide vertically in a guiding hole formed in the lower end of the plunger 92, which is mounted in the head 94 at the upper end ot the arm 50. A screw 96 is threaded into the plunger 92 and has a reduced end portion 98 which projects into a slot 100 in the stem 90. A screw 102, threaded into the upper end of the stem 90 and maintained in adjusted position by a check nut 104, is arranged. to engage the end 98 of the screw 96 and to limit adjustably the downward.

movement of the presser foot relatively to' the plunger 92. The spring 106 serves to maintain Vthe screw 102 yieldingly in engagement with the element 98, while a sleeve 108 projecting upwardly from the presser foot incloses the space between the presser ifoot and the lower end of the plunger 92, excluding dirt and Vpreventing anything 'from becoming caught between the opposing surfaces. A slot 110 in the sleeve permits the introduction of a screw driver to remove the screw 96 when it is desired, to dismount the presser root from the plunger. The plunger isadjusted vertically by means ot a hand wheel 112 to such a position that the path of movement oli' the lower face of the presser toot is as indicated by the dotted line 114, in F ig. 2, that is to say, the presser foot in its forward movement will barely clear the jaws of the heel form and the upper surface of the heel blank. In the event that the operative has not removed her iingers from the form, the presser toot in its forward movement will push them away to a position of safety, there being insulticient space tor her tingers between the presser foot and the heel.

rlhe adjustment oi the screw 102 is such that the space between the lower end of the plunger 92 and the upper face oi the presser foot is so related to the downward movement oi the arm 50 in applying pressure to the heel that the plunger will engage the presser foot and, through the presser foot, the requisite pressure will be applied to the lifts to force them together and hold them irmly while the nail or nails are being driven. Alfter the presser foot 52 has engaged the heel, the spring 106 yields during the downward movement of the plunger 92, permitting the pressure to be applied positively upon engagement of the plunger with the presser foot, and when the plunger againv rises the spring acts to restore the parts to their initial safety7 position as illustrated in F ig. 4.

While the particular embodiment of the invention selected for disclosure herein has been specifically described as included in the organization of the machine of the Tripp patent previously identified, it should be understood that the invention is equally applicable to heel building machines of other specific 'forms of construction, and it is contemplated that it shall be so used.

Having described my invention, what is claimed as new and desired to be secured by Letters Patent of the United States is:

1. n a heel building machine, thev combination of a contractile heel form, mechanism for applying pressure to the heel in a direction normal to the planes of the lifts, automatic means for contracting the form upon the lateral surface of the heel to aline the lifts, and interdependent nailing mechanism automatic means for contracting the formV upon the lateral surface of the heel to aline the lifts, and interdependent nailing mechanism and positive means for uninterruptedly maintaining the form in expanded condition until the operation of the pressure applying mechanism is started.

3. In a heel building machine, the combination ,of a contractile heel form, mechanism for applying pressure to the heel in a direction normal to the planes of the lifts, yielding means for contractingthe form upon the lateral surface of the heel to aline the lifts, and interdependent nailing mechanism and means for uninterruptedly maintaining the form in expanded condition until the operation ofthe pressure applying mechanism is started. Y

l. Ina heel building machine, the combination of a contractile heel form, mechanism vfor applying pressure to the heel in a direction normal to they planes of the lifts, yielding 'means for contracting Vthe form Y uponthe lateral surface of the heel to aline the lifts, and interdependent nailing mechanism and positive means for uninterruptedly maintaining the form in expanded condition until the operation of the pressure applying mechanism is started.

In a gheel building machine, the combi- Y Ynation'of a Vcontractile heel form, mechanism fory applying pressure to the heel in a direction normal to the planes of the lifts, mechanism for nailing the .lifts together,

' automatic spring means for contracting the Y form upon the lateral surface of the heel Vto alinethe-lifts, and separate means for maintaining Vthe form expanded except 'when the pressure mechanism is operated.

l6. In a heel building machine, the combination-of a contractile heel form, mechanism for applying .pressure to the heel in a'direction' normal to the planes ofthe lifts, mechanism for nailing the lifts together, automatic.meansl for contracting theV form fupon the lateral surface of the heel to aline th@ lifts, and-separate automatic means, al-

ways operative whenV they pressure mecha.-V

nism is quiescent, to expand the fornito permitthe introduction of lifts.

' i 'Z'.InV a Vheel building machine, the com- :bination of a contractile Vheel form, power nailing mechanism, yielding means for contracting the form upon the lateral surface of ythe Vheel V'to aline the lifts, and separate `means, controlled by an elementV of ,said

.powerf nailing mechanism, for keeping the form expanded to permit the introduction vof lifts when the nailing mechanism is inspringI means tending to contract the forni,V

and a cam, operated by said power mechanism, for keeping the formexpanded against the tension of the spring when said power mechanism is Ynot in operation.

10. In a heel building machine, the coinbination of la heel form, mechanism for driving `a nail through a heel in the form, a presser movable Vover and away from the form, and means permitting the presser to be moved over the form but preventing its retraction until Vthe nail has been-driven.

l1. In a heel building machine, the combination of a heel form, mechanism for driving` nail through a heel in the form, a presser movable into and out of alinement with the nailing mechanism, and means for preventing movement of the presser out of alineinentwith the nailing mechanism prior to the operation of said mechanism.

12. In a heel building machine, the combination of a heel form, mechanism for driving` a nail through ya heel in the form, a presser movable into and out of alinement with the nailing mechanism, and means under the control of said mechanism constructed and arranged to permit the presser to be drawn forward into operative position in alinement with the nailing mechanism and then to lock and retain itin that position until afterV the operation of said mechanism.

13. .In a heel building machine, thev combination of a heelform, mechanism for driving a nail thro-ugh a heelin the form, a

presser movable into and Vout of alinement Ywith the nailing mechanism, and a latch under the Vcontrol of said mechanismVY constructed and arranged to permit the presser to be drawn forward into operative position in aliiieinent with the nailing mechanism c and Vthen to lock and retain itin thatposition until after the operation of said mechav nismfV Y 'V 14;. In a heelbuilding machine, the combination of a heel form, a presser movable laterally.V relatively to the form and vertically relatively to a heel in the form, and means'for insuring that the lateral and vertical movements of the presser shall succeed each other alternately.

15. In a heel building machine, the combination ol' meanfs for supporting a heel blank, and a presser laterally movable over and away from the blank in a path sutliciently close to the face of the blank to insure against the presence of an operatives fingers between the presser and the blank.

16. In a heel building machine, the combination of means for supporting a heel blank, a presser laterally movable over and away from the blank, said presser being so constructed and arranged that in its movement into operative position over the blank it will engage and push away the lingers of an operative in case they have not been previously removed, and means for actuating' the presser to apply pressure to the blank.

17. In a heel building machine, the combination of a heel form, a presser carrying member movable into and out of alinement with the blank in the form, and a blank engaging presser mounted upon said member for movement over the blank in a path suiiiciently close to the blank to insure against the presence of an operatives fingers between the presser and the blank.

1S. In a heel building machine, the combination of a heel form, a presser carrying member movable into and out of alinement with the form, and a heel engaging presser mounted for positively limited yielding movement upon. said member during the pressure applying operation.

19. A heel building machine comprising an upwardly facing lift receptacle, a platen adapted to cooperate with said receptacle and including a power actuated inner head, and a loose outer head normally separated from the inner head when the platen is mov ing toward the receptacle, said outer head constituting a safety device.

20. A heel building" machine comprising an upwardly facing lift receptacle, a platen adapted to cooperate with said receptacle and including a power actuated inner head, and a loose outer head normally separated from the inner headwhen the platen is moving toward the receptacle, said outer head constituting a safety device and being pro-Y vided with a face arranged to press Vupon a lift in the receptacle.

In testimony whereof I have signed my name to this specification.

JOSEPH H. POPE.

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