US2333700A - Fastening pulling machine - Google Patents

Description

1943- R.. R; CAMPBELL 2,333,760

FASTENING PULLING MACHINE Filed-Apfil 8, 1942 'IIII Patented Nov. 9, 1943 Rouel R. Campbell, Lynn,""Massiassigiier to,

' United Shoe Machinery Corporation; Fleming-'- item-N. Jca corp t W Ji g, Application Annie, 1942, Seri a I 8 Claims. (o1. la- 5, f'

' This invention relates t iaanm pulling ma chines, and is herein illustrated as embodied in a machine for pulling tacks from shoes. Y

In various shoemaking operations tacks ,j are used'to, hold shoe parts upon a;last.; Fore ample, insoles are temporarilyl secured tothe in theformof a claw moving inaniorbital path.

While such machines have been insuccessful coma merciaL use for many years, it has been. found that undersome conditions, such, for; example, as

where the tacks are d riveniso'deeply. into thework; that their heads are embedded in the material of. the insole, difiiculty has --been. experienced inrethe tool in engagement with ,thework just prior moving such tacks withou't damaging the insole;

Moreover, in operating suchmachines without the useof specialguards, notonly has considerable inconvenience been experienced ,due to fiung tacks, but there is a substantialdanger that such flung tacks may injure ,-the operatQIi. Inview of the foregoing, itis an object r the invention to; provide an improved fastening (pulling machine which will be especially adapted forpulling deeply embedded fastening's without injuring the ,mate-.

rial and which, at the same time, is so constructed,

as to eliminate likelihood of injury tothe operator. v To this enda'nd as illustrated, the invention comprises an oscillating tack pulling tool, having wedge-shaped pulling members so constructed as to cause them to engage the underside of the head of a fastening upon movement of the tool in one direction without danger of damaging the work, and a claw arranged to engage the head of the fastening upon movement of the tool in the opposite direction to ensure removal of the fastening in the return movement of the tool. Preferably. each fastening, as it is pulled, is thrown in such a direction as to avoid any possibility of injuring the operator.

These and other features of the invention are 7 disclosed in the following specification, and in the accompanying drawing, and are pointed out in the claims. I i

In the drawing,

Fig. 1 is a view in side elevation, partly in section, of a portion of a fastening pulling machineembodying the invention; i

Fig. 2-is an end view, partly in section, of a portion of the-mechanism, for oscillating the'j fastening pullingltool; I i i 7 Fig.3 isanend view, trating initial engagement of the toolwithrthe w rn; r

t 1 w I i Fig. gis'an endview, partly in section, showing to a-fastening, pulling movement ofv the tool;

:,,.Ei -,-5;is a vertical cross sectionthrough the tool: and-work, taken along line V-V of Fig. .4; and Fig. 6isan end view, partly in section,"showing a position pfthetool during removal of a=;fasten-v ing fromthework. i

, rhe illustrative achine is sack pulling isaQ chine which, as shown in Fig. 1, comprises 1 1a frame illl having'projectin arm I2, in which is,

positioned a shaft l4 carrying at its outer enda tack; pulling tool [6. The shaft I l is oscillated through about .60 by means of a shaft: l8 driven by a pulleyjll and carrying an eccentric block 22; slidablypositioned in a; slot 24 in an arm zfi secured Joya bolt 28 to the inner end of the shaft The. tool, 16,;in the ;construction herein shown, comprisestwo plates 30 mounted upon a stud 32' in the outer endiof the shaft l4, and held in posi-i tion-thereon-by anut 3t anda key 36.. The plates 33 are :cut away at the loweren'ds thereof-to, form a'pas'sage and terminate in a flange 38, end. portions of which are tapered to form a Wedge 40: Theiflanges 38 are spaced apart to form a slot42, Fig. ,1, COI1 S'Gitl1ting a passage extending entirely through thetooland along Whichtacksmay pass as they engage the tool and after they have been. removed from the work. i l

-' The shape of the wedge portions 40 of the flanges 38 is such that, as the tool is moved over pivot 50 near the edge portions of the plates 30.

The claw normally extends across the space between the plates'and rests upon the upper pore tions of thewedges 4|]. When the tool is moved in one direction, the claw is pushed upwardly by the head of the tack, and then drops down into engagement with the upper surfacesof the wedge portions 40. Upon return movement of the tool, the" edge of the claw will engage the may in section; inns;

' newanddesireto securetheUnited States is:

7 2A fastening pulling underside of the head of the tack, as shown in v Fig. 4, and upon continued movement of the tool will pull the tack from the work, as shown in Fig. 6. t

The speed of the tool is about 1200 oscillations per minute. At this speed, the velocity of a tack, alter it has been removed from the work, will be such that, upon the next advance movement of the tool, subsequent to. pulling the tack, the tack will be thrown away from the tool, passing out at the rear end of the slot Q2.

In the operation of the machine, theoperator stands beyond the outer end of the 'sh'aft M and r the tool I6, and advances a sho e,;us uch'as, shoe.--

44, past the tool from right to leftinzli igs.$3, 4,

and 6. The tacks removed will be thrown to the operators left, thus eliminating any likelihood of injury to the operator, due to flying "tacks. Be cause of the wedge shape of the claw members. 38, the removal of deeply embedded fastenings is facilitated,- it only being necessary for the operator to tilt the shoe and force the sam against the tool-until the Wedge members engage the'un derside of the head of the tack-.

Having described my invention, what I claim as 1. In a fastening pulling machine, a pulling tool having a pair of spaced wedges adapted to engage the underside of-the head of a fastening to be pulled;a claw normally in engagement with the wedges, and means pivotally mountingthe claw for movement away from the wedgesiunder action of a fastening initially" engaged by the Wedge g 1; I V

machine comprising an oscillating tool'havinga slot extending from one end thereof to the'other to embrace the head of a tack to be pulled upon movement of-thetoolin on'e direction, and a claw mounteclupon the tool and movable into position back of the head of by ='Letters "Bateht of to the other,-a claw positioned between the plates. and pivotally mounted thereon for movement toward and away from the flanges, and means for oscillating the tool.

5. In a fastening pulling machine, a pulling tool comprising a pair of spaced members having depending portions terminatin in flanges spaced v apart to. form a passage for fastenings, each of the flanges having at anfiend; thereofa wedgeshaped portion adapted to enter between the head of a fastening to be pulled and the work in which it is embedded, a claw pivotally mounted formovement toward and away from the flanges -adjacent to the wedge portions thereof, and

means; fior' oscillating the tool to cause a fastening positioned in the passage to be gripped between the wedge portions of the flanges and the claw and thereafter to remove the fastening from the-.wQrk,--

6. In a fastening pulling machine, a pulling tool comprising a pairof spaced members each having laterally extending flanges spaced apart to form a passage -for fastenings' extending through the tool,- said flanges terminating in w'edge-shapedpcrtions constructed and arranged to engage the underside of the head of a fasten-j I ing to be pulled, a clawnormally extending in engagement with the flanges and pivotally mounted for movement away from the flanges the tack to pull the tack from th workupon w underthe action-of a fastening upon entering the passage, and means for oscillating the tool? '7. Ina fastening pulling machine, a pulling tool comprising a plur'alityof spaced'members terminating in flanges spaced apart to form a: passagefonfastenings, the flanges having their portions constructed and arranged to enter be tween the head of a fastening to bepulled and it the work: in which it isembedded, and a claw pivotally mounted upon' the" members for moved V m'ent away from'the'fianges during movement of thetool in which a fastening ispresented to I the passage and to engagethe'jastening upon movement ofcthe tool the opposite direction. '8. In a fastening pulling machine; an oscillatingfsh'aft; a tool-mounted upon the shaft com? prisingitwo spaced plates havinginturned flanges I forming therebetween a passage for fastenings and each terminating in'wedge-shapedend p'ortio'ns eons-tructed'and ar'rfangedtoengage the un derside 0f the head offafastening to. be pulled; and a claw pivotally mounted upon the toolfland normally extending into' engagement with "the wedge-shaped end-portions of thefianges.

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