US1074469A - Shoe-heel-nailing machine. - Google Patents

Description

J. P. SALABA.

SHOE HEEL NAILING MACHINE.

APPLICATION FILED JAN. 27, 1913.

" 1,074,469. Patented Sept. 30,1913.

I E m o 1 /6 I I I I I FIGJ'.

32" Ms .arromma- CZ- ym Z Y coumliq PLANOQRAPM co.. WASHINGTON. D. c.

'ZIOfiN F. SAL' ABA, OF ST. PAUL, M-INNESOTA.

snoE-HEnL-nArLrne MACHINE.

Specification of Letters Patent.

Patented Sept. 30,1913.

Application filed J'anuary27,1913. senainofimasss.

To all whom, it may concern:

Be it known that 1, JOHN F. SALABA, a? citizenof the United States, residing at St: Paul, in the county of Ramsey and State of Minnesota, have invented anew and useful Shoe-HeLNailing Machine, of which the following is'a specification.

My invention relates to improvements in shoe heel nailing machines, and the object is to provide a shoe heel nailing machine with guarding means by which the chutes holding the nails in position to be driven into the heel are prevented from accidentally receiving a second charge of nails before: each preceding charge has been driven into theshoe heel.

Another object is to make such guarding means easily applicable as an attachment to heel nailing machines already manufac turedor 1n use. a

In the accompanying drawing, Figure 1 is a front elevation ofthe upper and middle portion of a shoe heel nailing machine embodying my invention, only the parts of the machine deemed necessary to an understanding of my invention are shown. Fig. 2 is a sectional top view about as on the line a-a in Fig. 1. Fig. Sisa front elevation of the punch-carrying head or block of the machine with my attachment removed, exceptthe screws by which the attachment has been held. Fig. 4 is an enlarged side elevation of the attachment with the guard arm lowered. Fig.- 5 is about the same as Fig. 4' except that the "guard arm is raised and the spring of the attachment is modified. Fig. 6 is anenlarged itop view of the nail carrier of the machine with a portion of its top plate broken away. Fig. 7 is an enlarged top view of the middle portion of what may be termed the chute bar or chute block of the machine, because it holds or contains all the chutes in which the nails are contained just before they are driven into the heel.

Referring to the drawing by reference numerals, 1 designates a stationary frame of a heel nailing machine, whose lower portion is broken away. Insaid frame slides vertically a yoke composed of two vertical rods 2, a crosshead'g adjustably secured on the upper ends of the rods, and a 'crosshead or bar 4 uniting the lower ends of the rods. Of the many different means by which the yoke may be actuated up and down I have shown a shaft 5 journaled in the main frame and having an eccentric 6 fixed thereon so as to rotate within a yoke or strap 7, which is pivoted at 8 to the lower bar 4 of the yoke. Said shaft is rotated by a pulley 9 and a belt (not shown); and in order to start the shaft. quickly and stop it after each revolution, a foot or hand lever and a I clutch mechanism controlled thereby is eni- .ployed; but as such mechanism iscommon in such machines it is deemed unnecessary to here show or further describe the same. The crosshead 3 is at its middle provided with a series of nail driving punches 10,

(best shown in Fig. 3) and directly below said punches the top bar 1 of the frame is provided with nail chutes 12, of which only a 'few are shown in Figs. 1 and 2,but many of them are shown inFig. 7. In Fig. 1, 13 indicates a horizontal vertically slidable block, in which is dovetailed a horizontally slidable support 14, on which is mounted a heel supporting prop l5 and a crutch-shaped prop 16 for supporting the toe or upper of a shoe (not shown) when the heel is operated on after it is fixed on the shoe; but often itis only. the heel that is operated on so as to nail'its several layers of leather together; in which case the heel is placed asshownat 17 in Fig. 1. In said view 18 are automatically adjusted guides to hold heels of different sizes centrally below the .punch holderiand the'chutes. 15

and 16 1areadjustment nuts on the props '15 and 16, respectively, for adjusting their heights. ,7

The nail carrier is composed of a fiat arm 18 swinging in a horizontal plane on an upward sleeve 19 of the mainframe; on said sleeve is fixed a cam 20. The nail carrier arm is providedwith a series of nail apertures 21 (see Fig. 6'), below which is a-solid slidable :plate 22, provided with a stud 23,

moving in aslot 24: of the arm; said plate 22 is attached to a spring 25, which is so arranged that it becomes stretched when the nail carrier isswung away from the nail chutes 12, and will therefore pull the plate 22 away from under the nails and thus permit them to drop into the chutes, just as soon as the plate is released by automatically operated means (not shown) from an automatic catch (not shown) which holds the plate normallyin the nail-supporting position shown. When the nail carrier 1s swung back again from over the chutes, the

pin23 riding on the cam 20 restores the plate 22 to its normal position where it is again engaged by the catch (not shown), so it must support the nails placed in the carrier until the carrier is fully placed over the chutes again. The number of nails in each charge placed in the carrier is determined by the number of holes 26 in a plate 27,

which plate is removably held in place by a few dowel pins 28.

In the operation of this kind of machine the main operator places the heels as 17 upon the prop 15 and by stepping on a pedal (not shown) a mechanism (not shown) raises the block 14 and thereby the prop 15 so that the heel becomes firmly pressed and the plate 22 is set free to be retracted by the spring 25.; and as soon as the assistant has swung the nail carrier back again over the shelf 30, the operator may start the shaft 5, and as the latter makes one revolution the punches 10 will drive home all the nails in nails are many, as in some operations they sired upon any machine,

the chutes 12; the heel is then removed and replaced by anotherheel in need of nails. During such operation it frequently happens that the assistant mistakes the same one heel for a second heel, and therefore deposits a second charge of nails into the chutes before the previous charge has been driven down; the result of such blunder is that when the main operator, after attending for a few moments to the arrangement of the unfinished or the finished heels in the stock, returns to the machine and starts it, the punches will drive two nails in each chute down only far enough to wedge them so tightly in the chutes that it takes a long time to drill them out, especially when the are. Now to avoid such wasting of time for the machine and the operators, and also to avoid possible injury to the punches and the chutes when the latter are clogged by nails, I provide a guarding device, which, if built at the time the machine is built, may be mounted directly upon the punch carrying head of the machine, but if made and secured upon a finished machine, or if so de- I provide a plate 34 and secure it by screws 33 upon the front side of the cross-head 3; and on said plate I pivot at 35 a guard lever 36, having its free end bent sufficiently inward to touch upon the top bar 1 of the frame when the cross-head 3 descends to drive thenails'.

Fulcrumed at 37 in lugs 37 of said plate is a lever 38, whose lower end is normally'held forwardly by a spring 39, which may be arranged as in Fig. 1, may stand vertical as in Fig. 4, or it may be a partly compressed coilspring'as 39 in Fig. 5. In each case the spring tends to throw the upper end of the lever normally into a supporting position under the guard lever 36 whenever the lat-' the lugs 37 of the plate 34; in which posi-j tion the lower end of the guard lever resists either the usual short arm '18 or some other part of the nail carrier, and thus prevents the latter from reaching a position in which it can deposit nails into the chutes, and thus the assistant operator can not accidentally deposit two charges of nails into the chutes, l

but will be warned of the presence of nails already in the chutes. The moment the nails in the chutes are driven down, the guard lever will by its contact with the top of the chute bar 1 be raised and caught upon the top end of the lever 38, and will thus'remain raiseduntil the next charge of nails is put into the chutes, when the lug 41 will press on the lever 38 and cause the guard lever to drop into guarding position.

The inclined end portion 36 of the guard lever is partly to enable said lever to more readily engage the nail carrier, andgpartly to prevent the guard lever from catching in the groove or slot 24 of the nail carrier arm when the latter is swung outward from over the chutes and thus passes in contact with the end of the guard lever just after it is dropped to its lower position. Said end portion or member 36 by being inclined, as shown in Fig. 4, enables the member 18 of the nail carrier arm to raise itslightly and" pass forwardly beyond it. V

In Fig. 6 it is shown that the lug 41 may be secured by a screw 41, so that the screws 33 and 41 enable the device to be easily applied as an attachment to any shoe nailing machine. The device may'of course'be made to fit a nail carrier at either s1de of the machine, or one carrier at each side thereof.

What I claim is:

1. In a shoe heel nailing machine, the

combination with a chute block having a series of nail chutes arranged to hold nails in readiness to be driven, of a reciprocating punch carrier, having punches arranged to enter the chutes and drive the nails; there through into a shoe heel below the chutes, a movable nail. carrier arranged and adapted 'to receive a charge of'nails and deposit the same into the. chutes when moved in over them; a guard mounted on the punch'carrier and adapted to occupy alternately a higher and a lower position thereon, and

when in its lowered position to intercept the nail carrier on its way to the chutes; a trip mechanism mounted on the punch carrier and adapted to automatically engage and support the guard in its upper position, means carried by the mail carrier and arranged to act on the trip mechanism whereby the guard is dropped to its lower position each time the nail carrier deposits a charge of nails into the chutes, and'means intercepting the guard to raise it to its upper position every time the punch-holder descends.

2. In a shoe nailing mac hine,the combination with a chute block having a series of nail chutes arranged to hold nails in readiness to be driven into a shoe heel, of a reciprocating punch carrier having punches arranged to enter the chutes and drive the nails therethrough into a shoe heel below the chutes, a movable nail carrier arranged and adapted to receive a charge of nails and deposit the same into the chutes when moved in over them; a plate detachably secured to the punch carrier, a guard mounted on the plate and adapted to occupy a higher and a lower position alternately thereon, and when in its lower position to intercept the nail carrier on its way to the chutes; an automatically engaging trip mechanism mounton the plate and adapted to support the guard in its upper position; detachable means carried by the nail carrier and arranged to act on the trip mechanism, whereby the guard is dropped to its lower position each time the nail carrier deposits nails into the chutes, and means intercepting the guard to raise it to its upper position each time the punch carrier descends.

In testimony whereof I atfix my signature, in presence of two witnesses.

JOHN F. SALABA. Witnesses:

EDWARD K. BRENNAY, WILLIAM E. ADAMS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. G.

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