US2442490A - Shoe platform beveling machine - Google Patents

Description

June, 1948. A, J, GERMAIN 2,442,490

SHOE PLATFORM BEVELING MACHINE June 1, 194s.

A. J. GERMAIN SHOE PLATFORM BEVELING MACHINE Filed July 51, 194e 5 Sheets-Sheet 2 June l, 1948 A. J. GERMAIN 2,442,490

SHOE PLATFORM BEVELING MACHINE Filed July 31. 1945 :s sheets-'sheet s yf l W Patented June 1, 1948 attrarre`v snor: marrow BEVEIJNQ MAQHINE..

a erroratien OfMaSSaehufsefte Application J uit'Y 31, 1946, Seriallo: @847,395

12 Claims.

This invention pertains to the manufacture of slio'esffA the 'so-called? "platform or California t e,"`an"d inore'particularlvtoa machine for'bev eli'n'g' the 'rear en'd of a forpart'platform preparatory to its incorporation inthe shoe, the present invention relatii`g` to improvements in the apparatus 'disclosed' inv the' depending application Aof Hubert a." emitir-'serial No; 668.540, nieu May 19,1946;v

vThe platform, mid-sole or cushion member of a platform' shoe' customarily terniinatesat the shankoi' adjacent tothe' heel breast' li'rie When the shoe is to'have ahigh heel, Vthe forepart` platform being made from stock of substantially uniform thickness While' the heel usually var'ies'in height 'and may be considerably thicker than the forepart cr`platforniproper. `Where the platformV meets the heel it is'desirable'. to'provi'de an overlap offthese 'parts 'and to this end the platformis customarily beveled. to fit. the forward ed'ge of. the heel Whichis complementally beveled. The platform may be of ,substantialthicknesa for instance, upito threerquart'ersio tan inchv or` more, and is usuallymade offwo'od, sheet. cork, felt or the like. I-Ie'retofore` the. bevelingi of: the, rearA end off the platform has ,been done by hand, andsince the 'material of. the platform` is `resistant to cutting, by reason. of; its hardness or resilientnaturje, this hand operation. is slowlandflaborious andcan n-ot be depended upon to produce uniformlesults,

The principal object. of theinvention iste provideimproved work-holding means for positioning the platform and holding it, securely at the properangle for presentation toa beveling cutter orlknife. A further object, isto provide workholding. meansfor, use in a, power .driven machine and. operative securely te` grip andto hold the Work evenv though, the material. be of a nature which isdiicult. to out. A, further object is to provide Work-holding means i. Simplified. C011- structionk and which is easy to actuate both in securing thework, in position and in releasing it. otherandfurther objects and advantages 'ef the invention will; be pointed 'Out in GhafOllOWing more detailed descriptionl and byreference tothe accompanying crawugSilvllelerl Eig. l.V is a frontL elevation` of. a povver driven machine equipped with the Work-holding means ofthepresent-inveeiien;

Eig- 2 is a Plan View effthe meme@ Of. Fie 1 with parts broken ayvay;

Fig. 3 is a fragmentary elevation showing the lefi'i-hand` side of the improved Work-holding means of the present. invention with the parts in 'the position which they. occupy While the 22 work-holding means is being engaged with the vfork-'. ucv. v

Fig. 4 is a fragmentary elevation, to larger scale'than Eig. 3,' vsho'wirng'the rightrhandrside of the' holding' device; thewdrkesup' orting plate being broken away in part;

V4Fig.' `5 is" anfelevati'on showing the leftrhand sidsf'of' the `pin'cariyrig:'s1'idesof the Workiiol'ding'device arid showingthe actuating cam inra'die'ilsection;m

`Fig s asection substantially on the line 6 6 ofFiAi;

Figf'l'is a 'section substantially on the line l-- of Fig; 2; sh'ovvin'g'a 'platform heldin'pcsition in readiness t'obe beveled.

Referring to the drawings, the numerall (Fig. 1). designates thebase ofthe. machine, Which may be a4` castingand which has integral. upstandin'g p'ost's Ziand Bnea'rts right-hand edge. The base also has anupstanding supporting column i (Figs. 1.an`d 2) substantiallymidway,between its front and rear edges andvvhlch is horizontally elongate' transverselyof. the b ase and which is provided. atits .upperpartrwitha horizontal bearing for the; saw. shaft hereinafter-described..

The posts` Zjand 3v have vertical axial bores which; receive the: vertically adjustable lees,Y and respectively. Theselees. maybe held inv adr usted position by, any Suitable meausffer exam;- ple, set screvvs, 'Iheupper endsof these legs 5 6, are4 hired. in socketsinb-osses 'l projecting downwardly fromy the underside eff the table 9- This table hase substauellya, and horizontal upper surface 1.0 and isrrevidedwith a dQYetal slot Ihl extending :fromV its rear, edge l2 `to its forward', edge 1.2%, The table. has a, Substantially vertical and siaeethli"finished, reetiluearlefthand edge l@ exteudnafrom the, fear, edge l2 to the point i3, thisedge being clos/ely adjacent t'o the plane of action'of4 the cutter blade. Forvvardly 'of'the point [3 the table is widened to provide the' extension' I5 which supports the work-clamping device.

L"This Work-'clamping device'comprises a hori- '1 aprende; ,'wien'pa'raim eiong'ate rece Shanks. which e; tension le the` tabl Semitism/ing; threaded tei-thy@ eedopeiiiegs in' deeg;

The' member" |15', ie-tbls i 0f. *2litaill and may be nxedin adjusted positiv g The 'clamping device also comprises thefwcrl; pressing plate; le which is hinged to the nieiber I6` at 2!) to' turn about a horizontal agis. The plate l isv of spinerigidr maaar @aaneaaa are @da e its upper edge with a handle 2|, by means of which it may be swung about the hinge axis.

The work-supporting carriage comprises a rigid bottom plate 25 designed to rest on and to slide longitudinally of the table 9. This bottom plate 25 is provided with a downwardly directed key member 29 (Fig. 1) which ts and slides in the dove-tail slot of the table. A work-supporting plate 29 is hinged to the bottom plate 25 at 21 to swing about a horizontal axis extending longitudinally of the table. The axes about which the plates i9 and 29 swing are relatively adjusted so that they are spaced apart a distance approximately equal to the thickness of the workpiece and are located at opposite sides of the plane of action of the cutter. The plate 29 is of rigid material, for example metal, and has a smooth flat upper or left-hand surface for engagement with the work. In order that the shoe platforms may be beveled to any of the angles required by the industry, the supporting plate 29 is desirably arranged, as here shown. to swing from a vertical position, where it is parallel to the plane of the cutting blade, through an arc of the order of 45 or more.

A screw 39 (Fig. 1) passes through an elongate slot 3| in a lever 32 pivoted at 33 to a bracket 34 mounted on the carriage 25. The screw 36 has threaded engagement with an opening in a bracket 35 xed to the rear edge of the rear plate 29 near the top of the latter. By means of this screw 36, the plate 29 may be xed at any desired angle of inclination to the plane of the table top.

The plate 29 has four rigid guides 35, 36; 31,36 (Fig. 6) projecting from its under or right-hand side (Fig. 1) and arranged in the same vertical plane substantially mid-way between the front and rear edges of the plate 29. The guides 35, 39 are parallel and spaced apart and slope upwardly and to the right, as viewed in Fig. 6. The guides 31, 38 are parallel and spaced apart and slope downwardly and to the right as viewed in Fig. 6.

Two vertically slidable pin-carrying plates 39 and 49 are arranged at the right-hand or underside of the work-supporting plate 29. These plates have inclined bores 4|, 42; 43, 44 (Fig. 5) for the reception of the guides 35, 36; and 31, 33. Interposed between the adjacent ends of the plates 39 and 49 is an axially elongate actuating cam 45 (Fig. 6). This cam is mounted to turn on a stub shaft 46a carried by the plate 29 and has an actuating handle 46 by means of which it may be turned. When this cam is turned a quarter turn from the position shown in Fig. 5, the plates 39 and 49 are thereby pushed apart to the maximum extent. In thus moving apart, the plates are constrained by the guides 35, 36; 31, 38 to move to the right, as viewed in Fig. 6. from the inactive, broken line position to the full line position where the plates 39 and 46 are in substantial contact with the underside of the plate 29.

The plates 39 and 40 are provided with vertical rows of sharp ,pointed pins or claw-s, the pins carried by the plate 39 being designated by the numeral 41, and those carried by the plate 49 by the numeral 48. As shown in Fig. 6, the pins 41 are straight and sloped upwardly and to the right, being parallel to the guides 35, 39, while the pins 48 are likewise straight and slope downwardly and to the right, being parallel to the guides 31, 38.

The plate 29 is provided with guide bores for the several pins 41 and 48. These bores are properly 'sloped to permit the pins to slide (as the plates 39 and 40 move toward or from the plate 29). Preferably the guide bores for the pins 41 and 48 are of such dimensions as to receive the pins with a, free sliding fit. However, it is contemplated that instead of individual bores for the several pins the plate 29 may have a vertical slot corresponding to each row of pins and which receives all of the pins of a given row.

The pins 41 and 48 are of such length and so arranged that when the plates 39 and 40 occupy the broken line positions shown in Fig. 6 the points of the pins are retracted within the substance of the plate 29, but when the plates 39 and 49 are positioned against the plate 29, the points of the pins project beyond the upper or work contacting surface of the latter.

Springs 49 and 5D urge the plates 39 and 40 toward each other and thus keep them in contact with the cam45. The work-supporting plate 29 is preferably provided with a handle 5| (Fig. 2) projecting from its upper edge for convenience in adjusting it to the desired inclination and also to facilitate the operation of the clamping plate i9 as hereinafter described.

The bearing in the upper part of the support Il of the base is designed to receive a rotary saw shaft 59 having the drive pulley 51 at its lefthand end and which is designed to receive a power driven belt. The opposite end of the shaft is provided with means for attaching thereto a disk cutter, here shown as a circular saw blade E8. The parts are so arranged that the plane of this disk cutter is disposed very close to but out of contact with the finished vertical edge I4 of the table 9, the cutting edge being disposed rearwardly of the extension I5 of the table.

A shoe platform as above described is customarily made from stock of substantially uniform thickness; for instance, soft wood, felt, sheet cork or the like. 'I'he platform is died out from this material by a suitably shaped die so as to give it the desired peripheral contour, the rear edge of this blank, embryo platform, or workpiece thus produced usually being substantially straight. The rear edge portion of this workpiece or blank is of the same thickness as the remainder of the blank, and the purpose oi?l the present apparatus is to form a, bevel at the rear edge of this workpiece or blank.

Preparatory to the operation of the machine, the work-supporting member 29 is adjusted to an angle relatively to the plane of the upper surface I6 of the table 9 which is the complement of the desired angle of bevel, this adjustment being accomplished by loosening the nut 30 and swinging the plate 29 by means of the handle 5| to the desired position and then again tightening the screw 30. Assuming that the carriage is at the front of the machine and that the Worksupport 29 has been adjusted to the proper angle, the operator swings the handle 2| so as to turn the clamping member |'9 outwardly to the left, away from the member 29 to some such position as shown in Fig. 1. He then places the workpiece P (Fig. '7) against the upper or left-hand surface of the member 29 with its lower edge approximately in the plane of the table top |0. The clamping member |9 does not move with the carriage. The lower edges of the parts I9 and 29 are spaced and so located that when the workpiece is operatively positioned its lower edge is in the plane of the cutting blade. The operator swings the handle 2| to the right, as viewed in Fig. l, thus pressing the workpiece firmly against the left-hand or upper face of the support 29.

When `the clampingplate-l 9;has,.thusbeen;posif tioned, the operator.=mayrgripboth1of the handles 21 .and `:5i inhis .left hand-rat the. Sametime, and bytexertngea squeezingfongripping: pressureeupon these handles he may .very firmlypress thework: piece y between .ther plates:` l 9;;and 3295 Wl'iiia thus holding. the. handles 2| ,and'l with `his left hand; the.- operator swings the handle. ll3\vith-.his right hand; thus :turning the cam .45 so as .to .moveithe plates 29and Sittin oppositedirections- The/:pins t1 and .48- Y arefthus L projected :through the guide openingsin thel plate. 29.1and into the. substance of 'the workpiece .Pg which -is iirmlyssupportedffin opposition to thethrust'oftne pinstbytherigid plate I9 overlyingl it.. Sineeithespinsl carried.; by theplates 39 Land-4i);L respectively, slope-.in opp site-directions theylthave ya clawfaction, exerting a. talon-like.Y grip upon the vworkpiece when pro-l jected into thelatter, thus` firmly holding the workpiece tothe-support29 Ifheoperator now releases the clamping-plate, I9 andA preferably swings it to the left and-away fromtheplate 29; thus fully exposing the upper surface of the .workpiece so that the operator hask a clean view-oi theworkpiece during the cuttingoperation lThe operator now pushes the carriagegZS rearwardly, While leaving thehandle 4Sf1inthe-position to which it has-beenmoved,` and as` the -carriag-eis moved rearwardly theblade 53 passesthrough--the entire .width of the workpiece P, thus' s licingcff atriangularblock atV the low-er corner ofJ the workpiece. and providingthe desiredbevel. The carriage isnow Vreturnedtothe frontci' thenaachine and the handlee'lis restored to its initial position, thus retracting the pins from the workpieceA and freeing' the latter' for removal;A from the supporting plate 29; If preferred, the workpiece maybe releasedfrom the plate 2S before the carriage is returned to the front of the machine. y to other angles, the angle of the bevel will be correspondingly changed, It is thus. possible to bevel the platform to correspondtto, any typa of heel and to obtain substantiallyuniform results without requiring any particular skill or care on the part of the operator.

By reason of the firm talon-like grip-orV claw action which theV pins provideythe workpiece is very rmlyheldto the support 28 without requiring any effort on the part of the operator to hold it in place during the actual cutting operation; thus it is not nece-ssary for the operator to lean over the saw during the beveling operation, nor is there any danger that the workpiece will slip during the operation by reason of any failure of the operator to exert the necessary pressure or force to keep the workpiece in place.

Moreover, by reason of this novel means of attaching the workpiece to the support, it is possible to operate upon workpieces of any desired shape or material which may be employed for making a shoe platform with the assurance that the workpiece will be properly held at the desired position and angle for the beveling operation.

While one desirable embodiment of the invention has been illustrated by way of example, it is to be understood that the invention is broadly inclusive of any and all modifications falling Within the scope of the appended claims.

I claim:

l. Apparatus for use in beveling the rear edge of a shoe platform, said apparatus comprising a rotary disk cutter, a carriage movable in a path parallel to the plane of the cutter, an adjustable Obviously by adjusting, the support Z9 uorkfsuprprtlfmountedfoptthe;Carragetolswaa aboutlan-.aXS;paral1lt0-tl1erathof the Carriage, work-attaching elements carried by the work support. andcain means. operativa to engage Seid elements with the, workpiece.

2.: Apparatus for use. in .beveline the rear edge uffa-,shoe platform, said apparatus comprising arotary diskutter, a carriageY movable ina path narallclztctnefpane cf theA cutter, a support mounted mi the carriage, means operative tem,- porarily. to. clamp a, workrziecev .to the support-l work@attachingv elements carried by the. support, andfmeans for. operatively engaging saidattaching. elements with theworkpiece Vwhile the latter is temporarily clamped to the support.

3; Apparatusfor. use in beveling the rear. edge ofe'a shoeplatform, saidapparatus comprising a cutter, a carriage movable in apath parallel totheplane of action of the cutter, a, work support mountedzon the carriage, a: clamping., plate operative, to hold a workpiece temporarily in firm engagementY with the support, work-penetrating attaching elements having points normally housedwithinthe substance of the support,- and means for. projecting said pointsiinto a workpiece heldgbetween the clamping plate. and the support.

4. Apparatus for use in beveling the. rearedge of a shoe platform, said. apparatusA comprising a cutter,r a carriage movable in a path parallel to the planeof action, of. the cutter, a Work support mounted on the carriage, the support having aplurality of guide bores therein, worklattaching claws.slidabiain-saidvbores, andl means operative simultaneously to, advanceA said claw-s into holdingrelation to a workpiece on theA support.

5l Apparatusrforuse in bev-cling the rear edge of shoe` platform, said apparatus comprising rotary. disk cutter; a carriage movable in a path parallel'to the planeof the cutter, `a work support mounted on thecarriage, the support having aplurality of guide bores therein, two sets ot attachingy pins disposed to slide in said bores. one set ofv pins beinginclined oppositely to those. ofthe other set, and means operative toadvance all of4 said into a workpiece mann-tedV on the support;

6: Apparatus for use in bevelingthe rear edge ef' a Se@ mathrm, Said: artefatti-S. @Surprising aV cutter,4 a carriage movable in a path parallel to the pla-ne oiaction of the cutter, a work support mounted on the carriage, the support having a plurality of apertures therein, inclined guides iixed to the support, pin-carrying plates slidable parallel to said support, said plates having bores which receive said guides, said plates carrying attaching pins which extend through the apertures in the support, and means operative to move the plates in opposite directions, to cause them to move toward the support and thereby protrude the attaching pins into a workpiece mounted on the support.

'7. Apparatus for use in beveling the rear edge of a shoe platform, said apparatus comprising a rotary disk cutter, a carriage movable in a path parallel to the plane of the cutter, a work support mounted on the carriage, the support having two sets of guide apertures therein, a set of work-attaching pins disposed in each respective set of apertures, two plates parallel to the support, each plate carrying one of said sets of pins, respectively, means so guiding the plates that force applied to the plates in a direction parallel to the support causes them to move bodily toward and from the support, a cam operative to apply such force to the plates thereby to separate them, and springs urging the plates toward each other.

8. Apparatus for use in beveling shoe platforms comprising a stationary table, a rotary disk cutter, a carriage supported by the table, means guiding the carriage to move in a path parallel to the plane of the cutter, a work support hinged to the carriage to swing about an axis parallel to the path of the carriage, work-attaching claws carried by the support, means for projecting the claws into a workpiece resting upon the support, and means operative to hold the workpiece against the support while the claws are being engaged with the workpiece.

9. Apparatus for use in beveling shoe platforms comprising a stationary table, a cutter, a carriage supported by the table, means guiding the carriage to move in a path parallel to the plane of action of the cutter, a work support mounted on the carriage, two series of oppositely inclined attaching pins arranged to slide in corresponding bores in the support, means operative simultaneously to project the pins of the two sets into a workpiece resting on the support, and means operative to hold the workpiece in iirm engagement with the support while the pins are being engaged with the workpiece.

10. Apparatus for use in beveling shoe platforms comprising a stationary table, a rotary disk cutter, a carriage supported by the table, means guiding the carriage to move in a path parallel to the plane of the cutter, an adjustable work support hinged to the :carriage to swing about an axis parallel to the path of the carriage, a work-clamping member arranged to swing about an axis parallel to that about which the support swings, said axes being disposed, respectively, at opposite sides of the plane of the cutter blade and being spaced apart a distance approximating the thickness ofthe workpiece, the clamping means and support having handles which are juxtaposed when the vclamping means is in operative position so that they may both be grasped by the operators hand and urged toward each other, work-attaching means carried by the support, and means for operatively engaging sai-d attaching means with a workpiece held between the clamping member and support.

11. Apparatus for use in beveling shoe platforms comprising a stationary table, a rotary disk cutter, a carriage supported by the table, means guiding the carriage to move in a path parallel to the plane of the cutter, an adjustable work support hinged to the carriage to swing about an axis parallel to the path of the carriage, a workclamping member arranged to swing about an axis parallel to that about which the support swings, said axes being disposed, respectively, at opposite sides of the plane of the cutter blade, means whereby the clamping member may be urged toward the support by the use of one hand, and means actuable by the other hand for attaching the workpiece to the support.

12. Apparatus for use in beveling shoe platforms comprising a stationary table, a rotary disk cutter, a carriage supported by the table, means guiding the carriage to move in a path parallel to the plane of the cutter, an adjustable work supyport hinged to the carriage to swing about an axis parallel to the path of the carriage, a workclamping member arranged to swing about an axis parallel to that about which the support swings, said axes being disposed, respectively, at opposite sides of the plane of the cutter blade, handles projecting from the upper parts of the clamping member and support, respectively, said handles being so relatively disposed, when the clamping member is in operative position, that they may be grasped in one hand and urged toward each other` by the grip of the hand, thereby iirmly holding a workpiece interposed between the clamping member and support, work-attaching claws arranged to project through openings in the support and into the workpiece, a cam for projecting the claws, and a handle actuable by the other hand of the operator for operating the cam.

ALBERT J. GERMAIN.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,272,934 Fow et al July 16, 1918 1,400,698 Stiles Dec. 20, 1921 2,004,602 Folk June 11, 1935

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