US1999291A - Abrading machine - Google Patents

Description

Apiffifl 363),, 1935. J GQULDEQURN ET AL ABRADING MACHINE Filed Aug. 3, 1932 3 Sheets-Sheet l WE 1935 J. GOULDBOURN mm. 11,999,2W

ABRADING MACHINE Filed Aug. 5, 1932 3 Sheets-Sheet 2 Wl/E/WU/Qi T WW 5% E jg 'yw,

P 1935 J. GOULDBOURN HAL ABRADING MACHINE Filed Aug. 3, 1932 3 Sheets-Sheet 3 U Q- \.H..

Patented Apr. 30, 1935 issazt'i sesam it Q i E. stratum E in when.anesthetiiclay, Leicester, Englandi-iassi nors 11 .ilnited -Shoe lVIachine1-y ,flor'poration, Paterson, N. 3., a i antee New se A staircases August v.3; ministerial in). 827330 lln Great Britain August 25, 1931 and fineabrasives respectively are ordinarily used for this purpose. While the time required for transferring av heel from I the: coarse roll, :to the fine rolLappears to be small; nevertheless-it represents: an tappreciablefractionof the time required to perform the entirescouring operation :andithe total amountof time thus lost in the course :of a day is considerable. l a

2 :Ituisean' object of thetpresentinvention to provideaamachine havingboth ccarse vand fine abrading. members so constructed andarran'ged as to enable: a work-piece to be. transierred from the coarse 'to thesfine 'abrading member with substantially no loss oftime; i ,o b

: The illustrated machine is provided with a plurality act I driven-:abradingf elements of different degreesof coarseness and fineness respectiveily. and a .worlr-lrest so mounted: as to "be yieldable upon pressureto enable it to be shifted from'a positionconvenient. for the presentation of-work to one abrading element to a position convenient iiorthe presentation of the work to another abradingielement; In. accordance with a feature of the invention, the abrading: elements are arranged in side-by -side-relation =upon-a driven roll and the work-rest is guided-for movement in a path which is substantially parallel to the axis of the roll, the'worlr rest beingnormally maintained in a position convenient for lithe presentation of work to a relatively coarse abrading element.-. i. As

.tverticallyt with? the-szrelatively coarse-l abrading ememberaaboveithe relativelyafiner ab1'ading mem ober; w in the fact that it is convenient for the operator An advantagerofithisaarrangement resides first-to subject the work to the upperiabradin memb r Whichis-relatively coarse and then mere- 1y byithe downward pressure of hi -.-1.1a n iql hi the work' tom-the lower abrading member-which is relatively fine. v, i r. aflhese, and ctheri features; of the invention includingicertain details of construction andpornbinations of. parts ,Will be more, fully explainedin the accompanying description to beread connection with the accompanying drawings in U .t,. in. ,-il l; aux-1,1,.

is a front elevation of the illustrated machine;

Fig. ,1

.ml Ii l v Fig 2 is a right-hand side elevation of the :1

machine;

wFignfiis. aplan oi the eliminates the cover removed showing the scouringilcelts 1 and Fig. 4 is.a front elevationiof the mechanism which carriesitheoscouring belts,

said illustrative. machine; comprises a hollowccolumnv itcarrying alheadcasting lnisuitiableibearings tris, journalled a, vertical shaft it. on the lower .end of which are mounted two pulleys fiend; i it: Journalled in suitabletbearings, l2: near the baseoisthecolumnl is. a horizontal shaft 13. Onthe: left handend portion of the. shaftlit are amounted fastiand loose pulleys (l5 and i1. ,Abelt shifter aiflis providedh ilhis .is carriedona bar 2t slidablyi mountedinlthe base :of the columnJ.

;A-handle,23 is .pivoted at 25.to.. the :frontoithe colunh .t and iseoperatively connected to the bar 2L: .-Movement. of the handle 23 causes sliding movement aofgthebar 2i and so .causesldisplacemerit of the beltshifter. =A,belt.f11om-:an external source .of power-serves lto -drive thelshaftltmvhen it passes round the-fastpulleyiit. ,.l Iear.the;mididle ,of r the shaft gltuthere, is mounted on it. a pulley 2 1.; 3A beltiifiihpasses round this pulley and also ,roundione nor the other-oi the pulleys I .97, ll already 'mentionedr .Thehpulleys 9 and.

:arei-l or difierento diameters in order-l that. Iforl a reasonhereinafter 'rtorbe explained thelshaftl I mayibe driven .at different'speeds. Inorder that the belt flil may be maintained ti ghtlnotwithstandingthe difference in diameter' between the pulleys :ii and H, the belt is also led round two pulleys 31,-33 the positions of which may be adjusted. JIhese latterpulleys are mounted as follows: Secured by a bolt-35 tothe column is a bracket 3'! in -which -is an arcua te slot 39..

this-slot is adjustabl-y fixed, by means of--a nut provided with a: lockingv vhandle M, a stud A3011 z-which thelpulleyits is carried Also. mounted "on thezstud .43 isa 1ever45 at the rear: end ot :which is carried the pulley 3i and the front end of which is pivotally connected to one arm 4? of a bell crank lever pivoted at E9 to the column i. Another arm 5! of the bell crank lever is formed as a handle. The paths of movement of the stud 43 in the slot 39 and of the pivotal connection between the lever 45 and the arm Q? are substantially alike in respect to curvature and direction, so as to provide for a substantially parallel movement of the lever Upon loosening the lock ing lever it and manipulating the handle 5! the pulleys 3I and 33 may be shifted from the position shown in Fig. 2, wherein the belt 29 drives the pulley 9, to a position wherein the belt 29 drives the pulley I I, and in a similar manner the pulleys 3| and 33 may be shifted back again to enable the belt 29 to drive the pulley ii, the arrangement being such that the belt 29 will be under tension for either pulley. In order to facilitate shifting the pulleys 3| and 33, the tension of the belt'29 is allowed to slacken. This is accomplished by means of a short slot d6 in the lever 55, which slot enables the lever 35 to move toward the left under the tension of the belt 29 upon loosening of the locking lever it. Before locking the lever $5 in either of its positions of adjustment, it is again moved to the right to tension the belt 29.

Carried on the upper end portion of the shaft I is an abrasive band carrying roll 53.. The main portion of the roll 53 is of wood but the roll is axially bored to receive a metal sleeve 55 through which the roll is mounted on the shaft I. The external surface of the roll 53 is covered by a felt sleeve 5?. A fixed collar 59 is provided on the shaft I upon which the roll 53 rests, the roll being suitably recessed at G! to receive the collar. The upper end of the shaft l is reduced and screw threaded so that the roll 53 may be secured to the shaft by means of a nut 63. The roll is suitably recessed at 65 to receive the nut 63.

Running over the surface of the roll 53 are a rough abrasive band 61 and a fine abrasive band 69, the rough band being above the fine band. The bands 6'! and 69 are endless belts having their respective operating surfaces coated with abrasive material. Upon a vertical shaft I'I (Fig. 4) fixedly mounted in the head casting 3 are mounted two members I3 and which serve re spectively to support pulleys 'I'! and '59 round which pulleys respectively run the bands ti and Separate adjusting means are provided for altering the position or angular aspect of the pulleys Ti and '59 in accordance with variations in the lengths of scouring bands. As this means is similar in the case of both pulleys it need only be described with reference to one. The pulley IQ for example is carried on a short vertical shaft 8! carried by a member 83 pivoted by means of a pin 85 to an arm 8? extending from the member 15. The member 83 is provided with a rearwardly extending arm 89 and located below the end of this arm is a headed stud 9i carried by an arm 93 extending from the member iii. A rod 95 passes through the end portion of the arm 89 and through the head of the stud 9i and is in screw threaded relation with both these parts. The portion of the rod passing through the arm 39 is however screw threaded in the opposite direction to that passing through the stud 9i so that on rotating the rod 95 (which is provided at its top end with a knurled head 8?) the arm 89 is displaced relatively to the stud 9i. This causes the member 81-3 to be turned about the stud 85 and so cause slight variation in the angular aspect of the pulley '59 in relation to the roll 53. It is found that it is convenient to provide such an adjustment as on turning the rod 95 the position of the band 69 on the surface of the roll 53 may be accurately adjusted. By means of this adjustment the abrasive bands 57 and 69 may be brought as close together on the roll 53 as may be desirable, allowing for reasonable clearance, regardless of variations in the width of the abrasive bands. The member 75 has also formed upon it a forwardly projecting lug 99 to which is pivoted one end of a rod IOI. The head casting 3 is provided with an upwardly extending wall I03 which serves to enclose the scouring bands. This wall has an aperture therein through which the rod Iii! passes and has also a lug i235 formed upon it. In this lug is a vertical hole in which is received a short stud Isl, flattened at one side. The stud I9! has a horizontal bore made therein through which the rod IBI passes. At its end the rod IGI has a nut I89 and a lock nut III in threaded relation therewith. The arrangement is obviously such that should the band 69 be too slack the nut 39 can be tightened. This will swing the member 15 anti-clockwise (as seen in Figure 3) about the shaft II and so serve to tighten the band.

The work supporting means with which the machine is provided comprises a table or work rest H3. This table has two downwardly extending lugs I l 5 by which it is pivoted about a horizontal axis to a support Ill. The arrangement is such that the table may be tilted to a desired angular position and then fixed in such position by tightening a lock nut H9 which has an extension handle IZI. The support II! can be moved forwardly or rearwardly in a dovetailed slide I23 in a block I25. A set screw I2! is provided whereby the support II'I may be locked in adjusted positionrelatively to the block I25. The block: I25 is carried on two supporting columns I29, I3I which pass slidably through holes in a bracket member 133 which projects forwardly from the head casting 3. Threaded into the lower end of the column E29 and in axial relation thereto is a screw 935 towhich is pinned a sleeve I3'I. A member I39 is clamped to the column I3! and surrounds the sleeve I3'I. A leather washer MI is arranged between the top surface of the member E39 and the bottom surface of the forwardly projecting portion of the head casting 3 through which the column I23, passes. Two tension springs I43 are arranged between pins I45 and I41 respectively on the bracket member I33 and the member I 39. These springs I 43 normally serve to hold the table I 53 in raised position and it will be'appreciated that the level of this raised posiadjusted by unclamping the member I39 from the column i 3| and by rotating a head I 49 with which the screw I35 is provided, after'which the member E39 may again be clamped securely to the column ISI.

' The machine is furnished with dust collecting means. As already mentioned the head casting 3 has formed on it a vertical wall Hi3 which serves to enclose the scouring bands. At the top of the wall M33 is mounted a detachable cover I5I. As will be mentioned later, it may be desirable when operating 'upon different classes of work to make use of rolls 53 of different diameter. In order that the dust collecting means may be equally effective when rolls of diiferen't diameters are employed a shutter I53 is secured by means of screws 55 to the wall I03 adjacent the left hand side of the roll 53 while the mouth of a swingable duct :5? lies adjacent the right hand side of the Tell. If a roll 53 of for urample smaller'diameter.

be substituted for the one already in place, the screws i535 can be loosened and the shutter moved so that its edge is brought up adjacent to the surface of the new roll while the end of the-duct can be swung up to the surface of the new roll. A clearance is cut in the wall to allow of movement or" the fi t end of the duct ibl, and a slidable shutter i is provided to close up as much as possible of the aperture between the wall and duct. The duct is? is connected by a pipe Edi with a while another duct (the mouth of whichis sho in; igure 3 at 55) leads also to the fan 563 from the chamber which is constituted by the head casting 3, the walls of the casting 3, and the cover-Edi. The fan 583 is driven by means of a belt it? which passes round a pulley its on the shaft it.

The operation of scouring the breast surface of a loose heel by means of the illustrative machine will now be briefly described. In the case of heels of diiferent styles it may be desired to scour their breast surfaces to difierent curvatures and accordingly rolls 53 of diiierent diametemay be provided which are readily mounted upon or taken off from the shaft 5. For example the machine may have three alternative rolls respectively i3, 5 and t inches in diameter. When a large diameter roll is in place on the machine the belt will be a "ranged to pass round the pulley 9 on the shaft l but when the larger roll is replaced by a smaller one it will be desirable to change the belt 29 over to the small pulley ii.

Thus the linear speed of the abrasive bands bl and 59 which pass round the roll may be kept substantially constant despite the employment of rolls of different diameters.

A loose heel to be scoured will usually previously have been breasted (for example by the com mon guillotine knife type of heel breasting machine). The inclination of the general plane of the heel breast to the vertical will vary somewhat with different styles of heels and allowance can be made for this in the illustrative machine by loosening the nut its by means of the extension handle iii and thereafter adjusting the angularity of the table iit. The position of the table will also be adjusted along the slide 523 in accordance with the diameter ofthe particular roll 53 in use. The heel to bescoured is placed upon the table M3 by the operator, with the attaching face of the heel extending downwardly and with its breast towards the scouring bands. As the marginal portion of the attaching face towards the breast of the heel is usually curved, a suitable curved member ili is conveniently attached to the rear portion of the table H3 in order that a heel may be supported more stably upon the table. As has been hereinbefore mentioned the table is normally held in raised position by the action of the springs i it. Whenthe table is in this posi- 'tion the breast surface of a heel positioned as just described upon the table will be on a levelwith the upper (or rough) abrasive band ill. The operator presses the heel, still positioned on the table, against the band iii until he considers that it has been scoured to a sufficient extent by the rough abrasive paper when he will press the heel (and table) downwardly against the action of the springs M3. The breast surface of the heel will thus pass down to the lower (or fine) abrasive band 69 and its scouring will be finished thereby. When the operator removes the heel the table will of course rise automatically to be ready to receive the next heel to be scoured. It will be realized that the arrangement is such that the operator can control the extent to which the breast of the heel is scoured by the two bands and the machine operates to scour a heel breast surface rapidly and to a high degree of smoothness in one substantially continuous scouring operation without removal of the heel from the scouring against the scouring bands and downwardly so that the securing operation is very quickly and easily performed.

In order to prevent any tendency of a heel being scoured being carried oil: the table in the direction of movement of the scouring bands, the table i l 3 has a stop secured thereto by means of a screw H5. The'stop H3 contacts with the side surface of a heel being scoured and prevents the heel being carried on" the table by the action or the moving scouring bands.

Having thus described our invention, what we claim as new and desire to secure by Letters Patent of the United States is:

A machine for scouring shoe parts and similar ar icles comprising a driven roll having a pluty of abrading elements of difierent degrees coarseness and fineness arranged in side-by- ..cn, according to their respective degrees eness and fineness, along the length of the roll, a work rest, for guiding said work movement in a path substantially parallel roll, and means tending to tin work rest in a position convenient for 1 presentation of york to the coarsest of said elements, saii maintaining means being constructed and arranged to yield to enable said wort: rest to be shifted to a position convenient for the presentation of the work to a relatively finer abrading element.

2. A machine for scouring shoe parts and similar articles comprising a plurality of driven abrading elements of d erent degrees of coarseness and fineness respectively, a movably supported wori; rest, a stop for limiting the movement of said work rest in one direction, said stop serving to determine a position of said work rest convenient for the presentation of work to a relatively coarse abrading element, and a spring for urging said work rest to the position determined by stop, said spring being yieldable to enable said work rest to be shifted to a position convenient for the presentation of the work to a relatively finer abrading element.

3. A machine for scouring shoe parts and similar articles comprising rotary scouring means having a substantially vertical axis and having relatively coarse and fine abrading elements disposed at higher and lower levels respectively, a work rest constructed and arranged for substantially vertical movement, and means tending normally to maintain said work rest in a position convenient for the presentation of work to the upper relatively coarse abrading element, said maintaining means being yieldable to enable the work rest tobedepressed to a position convenient for the presentation of the work to a relatively finer abrading element at a lower level.

4. A machine for scouring shoe parts and similar articles, comprising two abrasive belts of different degrees of coarsenessand fineness respectively, a common r011 supporting and backing said belts, a pair of rolls cooperating with said common roll to support said abrasive belts respectively, and supporting means for said pair of rolls constructed and arranged for angular adjustment of the axis of each roll of said pair independently 0-1 the other relief said pair, and relatively to the axis of said common roll, whereby the position of each of said belts on the surface of said common roll may be determined.

5. A machine for scouring shoe parts and similar articles comprising a roll having its axis disposed substantially vertically, an abrasive belt of relatively coarse grit looped about said roll, an abrasive belt of relatively fine grip looped about said'roll below the first mentioned belt, means ient for thepresentation of work to that locality of the upper relatively coarse abrasive belt which is backed by said roll, said maintaining means being yieldable under pressure to enable the work rest to be depressed to a position convenient for the presentation of the work to that locality of the lower relatively fine abrasive belt which is backed by said roll.

JOSEPH GOULDBOURN.

' WILLIAM RODERICK BARCLAY.

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