US2000936A - Method of and machine for performing operations upon shoe parts - Google Patents

Description

May 14, 1935. R. E. DUPLESSlS METHOD OF AND MACHINE FOR PERFORMING OPERATIONS UPON SHOE PARTS 5 Sheets-Sheet 1 Filed Sept. 8, 1933 y 1935. R. E. DUPLESSIS 2,000,936 METHOD OF AND MACHINE FOR PERFORMING OPERATIONS UPON SHOE PARTS Filed Sept. 8, 1955 5 Sheets-Sheet 2 mmw 32 v y 4, 1935. R. E. DUPLIESSOIS 2,000,936

METHOD OF AND MACHINE FOR PERFORMING OPERATIONS UPON SHOE PARTS Filed Sept. 8, 1953 3-Sheets$heet 3 Q VENTUR Patented .May 14, 1935 UNITED ST S P N METHOD OF AND MACHINE FOR PERFORM- ING ()PEBATIONS UPON SHOE VPARTS Rene E. 'Duplessis, Beverly, Mass., assignor to e United Shoe Machinery Corporation; Paterson, i Q 7 N. J'., a corporation of'New Jersey Application September 8,1933, Serial No. 688,644.

21 Claims.

This invention relates to methods of and machines for performing operations upon shoe parts and-like articles, and is herein described and illustrated as embodiedin a machine for skiving and buffing boxtoes and counters. It is customary to skive such articles to a. feather edge and the skiving operation sometimes leaves the surface of the article in such condition that buffing may be desirable. In; suchcases the bufiing has hitherto been carriedohtas a. subsequent operation, requiring the use of a separate machine. I

It is an object of the present invention to provide a method of skiving and buffing a work piece in a single operation. 'In accordance with a feature of the invention, a work piece is pressed into a matrix and then skived to a-form determined by the matrix, and .While the work piece is still in the matrix the exposed surface ofthe work piece is buffed. Conveniently and in accordance with a feature of the invention, the matrix with the work piece pressed into it is first moved past a skiving tool and then past a bufling tool .to cause the exposed surface of the work piece to be bufied.

A further object of the invention is to provide a machinefor skiving and buffing work pieces such as counters and boxptoes. In accordance with this object, afeature of the invention consists of a machine organization comprising a feed member, a skiving tool for operating one. work piece as the work piece is advanced by the feed member, and a buffing tool constructedand arranged to. operate upon- ,the; skived surface of the work piece during the continued advance of the work pieceby thefeed member. .In the illustrated machine, the skiving means consists of a knife andthe bufiingmeans consists of an abrasive covered roll. In order to determine the form to which the work pieceis to be skived, a matrix is provided which,- in the illustrated machine, consists of;a driven roll having a depression into which the work piece may be pressed. The shape of the matrix is usually such as to cause the skiving knife tov leave the central portion of the work piece more or less fiat while beveling the edge portions. ,The matrix rollof the illustrated machine not only performs the function ofv a matrix but serves also as ameans for feeding the workpiece past the skiving knife and past vthe buifing roll. There is a very important advantage in the above-described pro-. vision for buffing the workpiece while the work piece is still pressed into the matrix in that it enables the,buffin foll to operate upon both the (Cl. 12-'6 1)' g v beveled and the unbeveled portions of the ex.-

posed surface of the work piece without increased pressure upon the locality at which these two portions merge into each'other. .A further advantage resides in the fact that such an arrangement enables the skiving and buffing of the work piece to be carried out in a single operation and by a single machine, saving a considerable amount of time in requiring less handling of'the work piece and also saving the space which would beoccupied by anadditional machine.

These and other features of the invention will appear from an inspection of the accompanying drawings, which illustrate a preferred embodi mer t of the invention, I and from the following' detailed description oftheconstruction and op}- eration of the machine illustrated therein.

In the drawings, 5 a V Fig. l is a view in side elevation of the improved machine; T p

Fig. 2 is a sectional View in side elevation of the skiving and buffing members together with portions of thefeed mechanism; 7 i i r Fig. 3' is a view inside elevati'onof portions of the interior mechanism; and 7 Fig. 4 is afragm'entary view'in front elevation (looking down at a slight inclination) or the parts shown in Fig.3.v

The supporting structure of chine consists of a frame III in whichis jourthe illustrated manaled a main shaft 12 :which is driven by any convenient source of power. Also journaled in the frame "-HJ is a shaft J8 upon which ismounted a matrix roll 20 having formed in it a pair of depressions 22and 24. In liig. 2 awork'piece W is shown as embedded in-the depression 24.

The shaft I8 is driven bysuitablegearingfrom the main shaft l2.'

- Secured upon the upper portion of theframe i0 is a magazine (Fig; 1) for a vertical stack of work pieces. The lowermostwork *piece of the stack rests upon a work table 32 (Fig-'2) and it is advanced in timed relation to' the matrix roll 20 in such a way as to cause it to register with one or another. of the matrix depressions 22 or 24. Secured in the upper portion of the frame lllisablock 34 upon theup.

per face of which is mounted a skiving knife 36 having'its cutting edge extending close tothe undepressed portion of the periphery of the matrix, roll 21!. As the lowermost workpiece-of the stack is advanced into one of the depressions, it is carried by the rotation of the roll past the skiving knife 36' and the work piece-is thus s'kived to the form determined by the 'matrix;

In Fig. 2 is shown a work piece W in the act of entering the depression 22. The machine as described up to this point is substantially the same in construction, arrangement and mode of operation of' its various parts as the machine described in U. S. Letters Patent No. 969,987, granted September 13, 1910, upon the application of -J. R. Scott.

For the purpose of assisting the matrix roll 20 in feeding the work piece, there is provided a plurality of toothed disks 38 (Fig. 2) which are mounted upon a sleeve 40' secured upon a shaft 42. The shaft 42 is journaled in the upper portion of the frame IE) and is driven by suitable gearing from the shaft I8. For pressing the work piece down into the matrix depressions there are provided a plurality of spring fingers 48 .(Fig. 2). The toothed disks 38 are spaced from each other, and the fingers 48 extend into the spaces between the disks. The construction of the present machine, so far as the toothed disks 38 and the springflngers 4'8 are concerned, is similar to that of the machine disclosed in U. S. Letters Patent No. 1,173,359, granted February 29, 1916, upon the application of E. E. Lane.

The work pieces are fed from the magazine 30 by a mechanism which will not be illustrated or described here in detail, inasmuch as this mechanism is fully disclosed in U. S. Letters Patent No. 1,260,553, granted March 26, 1918, upon the application of E. E. Lane. This mechanism consists substantially of a feed slide 49 carrying a thin member ,(not shown) which engages the lowermost work piece of the stack and advances it to the matrix. This feed slide is reciprocated by a lever 50 which in turn isreciprocated by a lever 53 driven by a. cam (not shown) on the main drive shaft I2. The lever 55? is provided with aslot whereby it enters into driving engagement with a pin 52 secured upon the feed slide. A link' 54 serves toraise and lower the lever 50to Jeifect engagement and disengagement respectively of the feed slide through the driving mechanism. Such raising and lowering of the lever 50 is controlled through a treadle 56 subject, however, to a mechanism indicated generally by the, reference character 58 which serves automatically to insure that the driving connection of the feed slide be made at such times and under suchconditions as to insure proper registration of the work piece W with the matrix roll-Z0. As above stated, this mechanism is fully disclosed in Letters Patent No. 1,260,553 and no further description of it need be made here. The machine as so far described operates only to skive the work pieces.

In order to provide for buffing work pieces, there is provided a buffing roll 68 having a sheet of emerycloth 5?, secured upon its periphery.

The-buffing rollBU is mounted upon a shaft 64,

which is journaled in a pair of 1 bearings 55 formed upon the ends of a yoke Bil. The yoke 68 constitutes one arm of a bell crank which is fulorumed upon a pin It carried in the upper end of a lever II. Integral with the yoke 58 and constituting the other arm of the bell crank is a lever 12. Threaded into the lower end of the lever "I2 is a pin I4 having a knob 36 formed upon itsouter end. Between the threaded end portion and the knob I6 the pin is is reduced in diameter and left unthreaded. This unthreaded portion of the pin 'M'passes through a cylindrical block I8, the; pin M being freely rotatable relatively to :the block I8 but the block I8 being held between .the enlarged threaded end portion and the knob I6 to prevent relative longitudinal movement of the block I8. Extending axially from each end of the block I8 is a pin 85. The pins 86 engage a pair of slots 82 respectively which are formed in a pair of lugs 84 formed on the upper portion of the lever II. It is evident that turning of the knob 16 in one direction or the other will move the lever i2 toward the right or left, as shown in Fig. 1, thereby rotating the bell crank comprising the yoke 58 and the lever I2 about the pin I8 and raising or lowering the buffing roll 5i to effect the desired adjustment of the buffing roll toward or from the matrix roll 20. A clamping bolt 85 extending through the lugs 84 passes through an arcuate slot 88 formed in the lever I2 and, when tightened, serves to clamp the lever I2 mas adjusted position. The lower end of the lever 'II is fulcrumed upon a pin secured in the lower portion of the frame IE! and coaxial with a shaft I58 shown in Fig. l. Formed in the lever ii is a slot 94 through which passes a bolt 55' which is threaded into the frame I9. Between the head of the bolt 95 and the lever 'II is an elongated washer 58 which, when turned crosswise to the slot 94, serves to hold the lever II in its operating position. When it is desired to replace an abrasive cover upon bufing roll, the Washer '38 is turned to an angle of degrees enabling it to slip through the slot 3 The lever it may then be swrmg outwardly to render the buffing roll accessible. A suitable opening formed in the upper portion of the rear wall of the frame I9 enables the buffing roll tc pass to and from its operating position. The bufllng roll 56 is driven by a belt I02 passing around a pulley E55 mounted upon the shaft 54 and also around a pulley I55 secured upon the shaft 58 which is journaled in the lower portion of the frame it. The outer end of the shaft 88 carries a pulley I i 0 around which passes a belt H2 which is driven by a pulley secured upon the main shaft I 2.

The shaft I 58, as above indicated, is substantially concentric with the fulcrum of the lever II, so that movement of the lever iI toward and from its operating position will notafife ct the tension of the belt I 62.

In order to retain a work piece within one of the matrix depressions 22 or 24 after the work piece has passed the skiving knife 35, there are provided three rolls H5, H8 and I26 respectively.

, These rolls are mounted in substantially tangential relation to the undepressed portion of the periphery of the matrix roll 25. Secured to each end portion of the knife support 34 is a bearing block I22 within which the ends of the rolls H6, H8 and I20 rotate. These end portions I24 are reduced in diameter, as indicated in Figs. 2 and 3. Secured upon each of the rolls H5, H8 and iii] are gears I26. Each of the gears I 25 meshes with a gear I23 carried upon the matrix roll shaft I8 so thatth'e three rolls H6, 'I I8 and i'20,'rotating in a direction opposite to that of the matrix roll, will assist the latter in feeding the work piece while holding the work piece positively in the matrix depression. The peripheral speed of the rolls H6, H8 and I23 is substantially equal to that of the matrix roll 25. A sheet metal guard I33 (Figs. 2 and 3) is curved about the matrix roll 20 and extends from the lower surface of the knife 35 almost/to the periphery of the abrading roll 60. This guard is secured to the bearing blocks I22 by screws I32. The guard 139 is slotted to provide clearance for each of the rolls I I6, I I8 and I20. The guard I39 serves to prevent the leading end of the Work piece from springing out of thematrix depressionand guides the lead ing end into engagement with the three feed rolls.

. In order to prevent the work piece from adhering to the abrading roll 60 and to keep it in the matrix depression, there is provided a stripper 'to the undepressed portion 'of the 'matrix roll 20. Secured upon the roll I46 is a gear I 48 which meshes with the gear I28, thereby driving the roll I46 in a direction opposite to that ofthe matrix roll and causing the roll 146 to assist inthe feedof the work piece. The directions of rotation of all of the various rolls respectively are indicated by arrows on Fig. 2. Depending from the cross piece I33 and curved about the forward lower portion of the abrading roll 60 is a sheet metal guard I50which protects the operator from contact with the abrading roll. The lower end of the guard I50 is supported by a rod I52 extending between the .side walls of theframe I0. A downwardly inclined web I 54 serves asa delivery chute for the work pieces as they leave the roll I46 and the matrix rollZB. a

In the operation of the machine, the work pieces W are fed by the automatic mechanism from the stack within the magazine 30 being advanced in timed relation to the matrix roll 20 sothat each Work piece registers with a depression on, the matrix roll; The work pieces are first carried past the knife 36 which skives them to a form determined by the depressions in the matrix roll. 'As the matrix roll continues to rotate, the work pieces are retained within the depressions by the rolls H6, H8 and I20, which rolls also assist in the feed of the workpiece. Continued rotation of the matrix r011 brings the work piece into engagement with the'bufling roll which finishes the entire exposedsurface or the 'work piece. Aiterpassing the bufiing roll, the work piece continues past the beveled edge of the stripper I35 and past the roll I45 whereupon it dropsiout' of the depression in the matrix roll into the chute I54 from which it may fall into'a receptacle.

Having described the invention, what I claim 1. Amethod of making shoeparts and the like which consists in pressing a work piece into a.

matrix, skiving the work piece to a form determined by the matrix, and bufling the exposed surface of the work piece while'the work piece is still in the matrix.

2. A method of making shoe parts and the like which consists in pressing a workpiece into a matrix, moving the matrix past a skiving tool to cause the workpiece to be skived. to a 7 form determined by the matrix, and in further moving the matrix with the work piece pressed therein past a bufling tool to cause the exposed surface of the work piece to be bufied. I

3. A machine for operating upon shoe parts and like articles comprising a feedm'embenaskiving tool for operating upon a work piece as the work piece is advanced by said feed member, and

a bufiing tool constructed and arranged to operateupon the smveesumce oithe work; piece, I r

by. said feed member; v LA machineforfoperating upon shoe parts during the continuedadvanoe of the workpiece andlikearticles comprising a. feed roll, a rela- I":

tively stationary skiving'knife positionedto operate upon a workpiece which isbeing advanced by work piece during the continued advance of the work piece by saidfeed rol1,and means for holding thework piece against said feed roll.

and like articles, comprising a cutting tool, a

buffing. tool, a matrix, andineans for causing opera-tive engagement first between a workpiece in said matrix and said cutting tool andthen between the work piece and said bumngtool.

6. A machine for operating upon'shoe parts v and like articles, comprising a knife, abufiing tool, a matrix, and means for moving said matrix to cause a work piece in the matrix to come into' then with said bufiing'tool. g 17. A machine for operating upon shoeparts operative engagement. first with saidkniie and skiving tool and then to said bufiing tool. j

8. A machine for operating upon shoe parts and said feed roll, abuffing roll constructed and a-r ranged tooperate upon the skived surface of the A machine for operating upon shoe parts 25: and likea'rticles, comprising. a skiving tool'fa like articles, comprisinga skiving tooLa bufiing tool, a matrix'means for causing operative engagement'first between a work piece in said thework piece and said bufling to0l,and means for retaining the work piece in the'matrixbetw'een said'skiving and bufiing operations.

9. A machine for operating upon' shoe parts and like articles, comprising a skiving tool, a

binfing tool, a driven matrix roll constructed and. arranged to present a work piece first to saidskiving tool and then to said-buffing tool, andmeans positioned between said skiving tool and said bufiing toolfor retaining the work piecein the matrix. I 10. A machine'for operating upon. shoe parts and like articles, comprisinga skiving tool, a builing tool, a driven roll-having a matrix depression.

and constructed an d'arranged to present a work piece in said depression first to said skiviiigntool and then to saidbufiingtool, said bufiing tool being driven in a direction to oppose the feedof the, j

1 work piece, and driven means engageable withthe exposed surface ofthe workpiece .in said matrix depression for assisting the matrix roll in feeding the work piecepas't said bufiing roll.

"ll-. A- machinefor operating'upon shoe; parts and like articles, comprising a skiving tool, a buning tool, a driven roll having a matrix depression and constructed and arranged to present a work piece in said depression first to said skiving tool and then to' said bu fing tool, said buffing tool being driven in a direction to oppose thefeed of the work piece,;and'driven means 'engageable and like articles, comprising a skiving tool, a bufi ing tool, a drivenroll having a matrix depression and constructed and arranged to presenta work piece in said depression first to said skiving tool andthen to said bufling tool, and a plurality of rolls substantially tangential to the undepressed portion of said matrix roll for retaining the work piece in said matrix depression between said skiving tool and said buffing tool. 7 r

13. A machine for operating upon shoe parts and like articles, comprising a skiving tool, a buff ing tool, a driven roll having a matrix depression and constructed'and arranged to present a work piece in said depression first to said skiving tool and then to said bufiing tool, a plurality of rolls substantially tangential to the undepressed portion of said matrix roll for retaining the work piece in said matrix depression between said skiving tool and said bufiing tool, and means for driving said retaining rolls to assist said matrix roll in feeding the work piece.

14. A machine for operating upon shoe parts and like articles, comprising a skiving tool, a bufiing tool, a driven roll having a matrix depression and constructed and arranged to present a work piece in said depression first to said skiving tool and then to said bufiing tool, and a guide member close to said matrix roll and having a work guiding surface curved about said matrix roll between said skiving tool and said bufiing tool to retain the'work'piece in said matrix depression.

15. A machine for operating upon shoe parts and like articles, comprising a skiving tool, a bulfing tool, a driven roll having a matrix depression and constructed and arranged to present a work piece in said depression first to said skiving tool and then to said bufiing tool, a plurality of'rolls substantially tangential to the undepressed portion of, said matrix roll for retaining the work piece in said matrix depression between said skiving tool and said bufiing tool, and a guide member close to said matrix roll for assisting said retaining rolls in retaining the work piece in the matrix depression, said guide member having a work guiding surface which is curved about said matrix roll between said skiving tool and said bufiing tool and which is recessed to accommodate said retaining rolls. a

16. A machine for operating upon shoe parts and like articles, comprising a skiving tool, a-

buifing tool, a matrix, means for causing operative engagement first between a work piece in said matrix and then between the work piece and said bufiing tool, and means for preventing the work piece from adhering to said bufling tool.

1'7. A machine for operating upon shoe parts and like articles, comprising a skiving tool, a buffing tool, a driven roll having a matrix depression and constructed and arranged to present a work piece in said depression first to said skiving tool and. then tosaid buffing tool, and means engageable with the leading endof the work piece as the work piece passes said bufiing tool to strip the work piece from the buffing tool.

18. A machine for operating upon shoe parts and like articles, comprising a skiving tool, a bufiing tool, ,a driven roll havinga matrix depression and constructed and arranged to present a work piece in said depression first to said skiving tool and then to said bufiing tool, said bufiing tool being driven in a direction to oppose the feed of the work piece, and a feed roll positioned beyond said buffing tool and engageable with the exposed surface of the work piece in the matrix depression, said feed roll being driven in a direction to assist the matrix roll in feeding the work piece past the bufiing tool.

19. A machine for operating upon shoe parts and like articles, comprising a rotary bufiing tool, a driven roll constructed and arranged to present a Work piece to said bufiing tool, a carrier for said buffing tool, a pivoted support for said carrier to enable said buifing tool to be moved away from said roll when it is desired to replace the abrasive element of said bufiing tool, a driven shaft substantially coaxial with said pivotal support, and a driving connection between said driven shaft and said bufiing tool.

20. A machine for operating upon shoe parts and like articles, comprising a. driven rotary buffing tool, means for presenting a work piece to said buffing tool, a carrier for said buffing tool, means for supporting said carrier for movement of said bulfing tool from an, operating position relatively close to said work presenting means to a position relatively remote from said work presenting means when it is desired to replace the abrasive element of said bufling tooLand a support for said buffing tool adjustably secured upon said carrier to enable the buffing roll, when in operating position, to be, adjusted toward and from said work presenting means.

21. A machine for operating upon'shoe parts and like articles, comprising a driven rotary buffing tool, means for presenting a work piece to said buffing tool, a carrier for said buffing tool, a pivotal support for said carrier to enable said bufilng tool to be moved from an operating position relatively close to said work presenting means to a position relatively remote from said work presenting means when it is desired to replace the abrasive element of said buffing tool, a support for said bufiing tool pivotally mounted upon said carrier, and means for adjusting said buffing roll support relatively to said carrier'to vary the distance between said bufling tool and said work presenting means when the carrier is in operating position. q

' i RENE E. DUPLESSIS.

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