US1997386A - Edge grinding apparatus - Google Patents

Description

April 9, 1935. R. .1. LouvlAUx EDGE GRINDING APPARATUSv 4 Sheets-Sheet 1 Filed Oct. 50, 1951 Inventor Paou/ el. Low/faux.

' g Cttorn April 9, 1935. R. J, LOUV|AUX 1,997,386

EDGE GRINDING APPARATUS FiledOct. 30, 1931 4 Sheets-Sheet 2 I mentor P000/ 0/. ouv/00x.

April 9, 1935 R. J. LouvlAux 1,997,386

EDGE GRINDING APPARATUS Filed Oct. 30, 1931 4 Sheets-Sheet .3

nvenfor l Cttorneg P0011/ d Low/foul.

Plil 9, 1935- R. J. LouvlAUx 1,991,386

EDGE GRINDINGV APPARATUS Filed Oct. 30, 1951 4 Sheets-Sheet 4 Bnventor Y F000/ el. OUV/00X.

Gttorncg Patented `Apr. 9, 1935 anni:` GmNniNG APPARATUS Raoul J; Louviaux, Toledo, Ohio, assignor toLibbey-Owens-Ford Glass Company, Toledo, Ohio,"

a corporation of Ohio Application october a0, 1931,'` serial No.A 571,996

i claims. `(o1. 51 33 The present inventionrelates broadly to improvements in grinding machines and more particularly to a machine or apparatusV for grinding the corners of sheets oi glass and the like.`

` f An important object of this invention is the `provision of a grinding machine of the character abovev described which Wi1l.operateznotonly to round.A the' corners of the glass sheet but which will at the` same time bevel or nishthe vsaid corners whereby uniformlyrounded corners with Well iinished surfaces are secured. Y

Another objectloi the invention is the/provision of such a grinding machine ofsimple, in-

expensive construction, which will "round the corners `of the glass sheetszrapidly, accurately and economically and with` a `minimum effort and :attention on the'part ofthe operator.`

Y A` further object of the invention is the provision :of suchv agrinding .machine operable for rounding the `corners of glass sheets, the edges gle orV an angle either greater or. less than al 90 angle. i 'Stillanother object ofthe invention is the `provision of such a grinding/machine including an" abrading. element, togetherfwith meansi for adjustingsaid element` to f compensate forfthe Wear thereupon. Y'

Other objects and advantages of the invention will become more apparent during the course of the following description when taken in connection With'the-accompanying drawings. f

Same,

' Fig. l` is asideelevation of a grinding machiney constructed in accordance vwith the present invention, i. *11"* Fig. 2 is a plan view. thereof,

Y. Fig. Bis anelevation'of` the the abrading element;`

. Figs. 4, `5 and dare diagrammatic views showing the swinging movement `of 'the abrading ele'- .rnent, andf4 s i i Figs. 7 andS are viewssomewhat similar `to vl'iigsl to 6 but showing the grinding of `glass sheets,.the edges of which are `disposed to form an angle eithergreater or less than a 90o angle. Y VReferring now to, the drawings, and particularly `with reference rst tollgs. -lto 3, the

`driving means lfor supporting framework vdesignatedi in its `entirety by the numeral I and whichmay be constructed ofvsuitable` structural elements including 'the 7within which the iront vertical ally therethrough. grinding `machine herein provided comprises a i four vertically disposed corner supportsforlegs V I I, I2', I3 and 'I4 connected together `at one or 'aplurality `of points throughout their vertical extent `by the horizontal cross pieces l5, I6I11 and I8; The cross pieces I6 project beyond leg I2 and secured` at their outer ends `to a vertical leg I9..` Disposed opposite legIi is 1a vertical leg 20 connected thereto by one.` or more cross pieces 2 I `and also connected with leg I9` by one or more cross pieces 22. i f Y Supported by the legs Iii -and tgiof the framework ;IB is a substantially I -shaped bracket 23` comprising a horizontal bottom portion 24. providedalong its outer longitudinal edge with an `upstandingvertical portion 25. `Carried by the I L-shaped bracket 23 are a plurality oi horizontally aligned `rollers 26 whichare adapted to constitute a supporting `runway for the glass sheets 21, the'corners of which are adapted to be roundj ed. Each of the rollers V26 is provided with a plurality of grooves` 28 within which the lower edges 1 of theglass sheets are received when the saidy sheets are stood in a vertical position, EachrollerA 2E is` also freely mounted upon a transverse pin 29 which extends through'a vertically disposed slot Sligformediin the upstandingfside portion 25 of bracket 23and' has threaded there-` upon outwardly thereof a nut 3i.` With such a i [Also carried by the leg` 26 above the `L-shaped bracket 23-is aforwardly projecting horizontal bar 32r upon which is slidably `mountedthesheet` retaining member 33, said member being adapted to engage-the forward vertical edges of the glass sheets 2'I so as to maintain the said sheets in a Vertical position during` the grinding foperation. In order to more effectively retain the sheets ina o vertical position, the member`33 vis preferably,

formed with` a plurality ofgrooves or the 1ike34 sheets are received.v i Y Secureclto the legsi I and 2i) oi the supporting framework I0 are the horizontally aligned bearing brackets 35 and i365 respectively within which is rotatably` mounted y, a horizontal, shaft 31.

Keyed to this shaft 3l between the bearing brackets 35- and 36 is a swinging carriage 38 provided Withga rectangular `opening. 39 extending` later- Carriedby the carriage 38 and arranged trans-f versely thereof is a relatively long bearing sleeve 40, said; sleeve being receivedthrough the lateral opening V39 and being formed intermediate its edges of the glass able within thesaid opening. Journaled within the sleeve 4E? is a shaft 42, said shaft projecting at opposite ends beyond the said sleeve and carrying at one endrthe abrading element 43 here shown as being in the form of a disk or Wheel pro Vvided with a plurality of grooves 44 in the periphery thereof and which grooves are adapted to be inalignment with the groove 23 in the sheet supporting rollers 26.

Supported upon a horizontal platform 45 carried by frameworki 5 is an electric -motor it driv ing through suitable reduction gearing located in casing 41, a shaft 43. lFixed to the outer end of shaft 48 is a crank 49 carrying at its outer end a crank pin 5i) upon which is pivoted one end of a crank arm 5|, the opposite end thereof being pivotally' connected with the swinging carriage 38 as at 52. Inasmuch as the shaft 31 is rotatablymounted within bearing brackets 35 and 35, and the carriage 38 is keyed to shaft 3i, it will be readily understood that, upon operation of motor 46 to drive shaft 48,*the crank 49 will be rotated so as to reciprocate the crank arm 5i,l

and thereby cause the carriage 38Yand consequently the abrading Wheel 43 to be swung back Y and forth through a vertical arc about the axis of shaft 31. is voscillated through an arc in a plane parallel In other words, the abrading wheel `swinging movement thereof if desired by means of a counter-weight 53 slidably received lupon a rod 54 secured to said carriage at 54'.

' In accordance with the presentinvention, the

Vabrading wheel 43 is adapted to be simultaneousyly rotated during vertical swinging movement thereof. To this end, there is mounted upon the f horizontal platform 55 carried by supporting framework i'ra secondv electric motor 55, the shaft 51 of which carries a sheave or pulley 58 `about which may be trained -one or a plurality of endless belts 5S also trained about a similar sheave Si! loosely mounted upon the adjacent end of shaft 31 which` extends beyond bearing bracket 35. Fixed to the shaft 31 inwardly of sheave S5 is a relatively short arm 6l formed Vat its Vouter end with a horizontal bearing portion 62 within which is journaled a shaft 63.v

Mounted upon this shaft 63 is 'a sheave 64 about which is trained a plurality of endless belts 65 also trained about a second sheave 55 loosely received uponv shaft 31 outwardlyrof sheave 6U but secured thereto. Also carried by shaft 63 isa secondsheave 51 about which is trained a plurality of endless belts 63 also trained about a sheave 69 keyed to shaft Upon operation of the motor `56, rotation will -be imparted from the motor shaft 51 to the shaft 42 and consequently to the abrading wheel 43 through the belt and sheave arrangement just described. More specifically, the sheaves 50 and 56 are driven from sheave 58,V while sheaves 64 and 61 are driven from sheave 65, the sheave 65,

being driven from sheave 61.- Due to the par ticular construction and arrangement herein provided, the abrading wheel 43 can be rotated independently of and simultaneously with its vertical swinging movement.

The bearing sleeve 4l] is normally maintained in a fixed position relative to the carriage 38 by means of the oppositely disposed machine bolts or the like 1li and 1l which pass through slots 12 in the carriageY and engage the square central portion 4i of sleeve 45. In order to vary the position of the abrading wheel relative to the carriage, however, such as when it is desired to compensate for the wear thereof, there is provided an adjusting screw 13r which passes through lthe end plate 14 of carriage 38 and also engages the square portion 4l of sleeve 45. When it is desired to move the abrading wheel either inwardly or outwardly relative to the carriage, it is simply necessary to rst loosen the bolts 'i0 and 1i and then rotate adjusting screw 13 in the proper direction, after which the said bolts 15 and 1i can again be tightened. Of course, upon any movement of the bearing sleeve 4!) either inwardly or,

outwardly with respect to the carriage, it is also necessary to adjust the arm l6l rotatively upon shaft 31 so as to maintain the endless belts V68 taut. To this end, the arm 6| is shown as being secured to shaft 31 by fastening elements15 and, uponloosening of these fastening'elements, the

arm 6i may be turned upon shaft 31 to either loosen or tighten the belts 68 depending upon whetherthe bearing sleeve. is movedlinwardly or Y outwardly. Y

In rounding and finishing the corners of glass sheets or plates with the Vmachine above described, the said sheets 21 are rst stoodk on edge in a, vertical position upon the rollers 26, the

'motor 56 is also operated to effect a simultaneous rotation of the abrading wheel. During the oscillating movement of the abrading wheel, Ythe corners of the sheets to be rounded Will be'received within the grooves 44, and this swinging movement oftheV abrading wheel, coupled with the simultaneous rotation thereof, will effect the vrounding and finishing of the corners of the glass sheets.

The particular swinging movement of the abrading wheel relativeto the cornerl to be rounded is, it is believed, clearlyV illustrated in Figs; 45 and 6. Y

Although there has been -described hereinabove rand illustrated in Figs. 1 to'6, the rounding of corof which `are disposed to'form either an obtuse.

angle or an acute angle. Briefly stated, this' may be accomplished by shortening or lengthening the arc through which the abrading wheel is swung. For instance, there is shown in Fig. 7 the roundingv of the corner of a sheet of glass the edges' A and B of which are disposed to formV an lacute angle, while in Fig. 8V is shown the rounding of the corner of a sheet of glass the edges C and ,D of which are disposed to form The motor 45 is then placed in operation ratus illustrated in Figs. 'l and 8 may be provided. Thus, the crankcarried bygshaft 48 is here designated by the numeral 16, and the crank arm 51a (corresponding to crank arm-5l in Fig. 1) is formed of two separate parts 11 and 18, connected together end to ,end by a turnbuckle 19 so that, upon rotation of the turn-buckle, the parts 11 and 18 may be drawn either inwardly toward one another to shorten the over-all;

length of the crank arm or moved further apart to increasethe length thereof. 'Ihe crank arm Sluis pivotally connected to the crank 16 `by ymeans of a bolt `8l! which passes through a slot 8| inthe said `crank so that the throw of the Vcrank as well as the length of the crank arm may be varied. When rounding the corners of glass sheets, the edges of which are -disposed to form an obtuse angle as in Fig. 8, the throw of the crank should be shortened as Well as thev length of the crank arm 51a.

It is to be understood that lthe form of the invention herewith `shown and described is to be taken as the preferred embodiment of the same, and that various changes in the shape, size and arrangement of parts may be resorted to without departing from the spirit of the invention or the scope of the subjoined claims.

I claim:

l. In a machine for `grinding the corners of,Y

glass sheets, a movable abrading element, means for supporting thesheet to be ground on edge in a fixed substantially vertical position, means for swinging the abrading element vertically back and forth through an arc and inl engagement with the corner of the sheet to effect the grinding thereof and while the said sheet is maintained in such fixed position, and means for counterbalancing said abrading element. v v

V2. In a machine for grinding the corners of glass sheets, an abrading wheel, a pivotally mounted bracket for supporting said wheel, meansV for supporting the sheet to be ground on edge in a fixed substantially vertical position, means for swinging said bracket about its pivot to move the abrading wheel back "and forth through a y Y3 substantially vertical arc and in Yengagement with the corner of the. sheet to effect the grinding .thereof and while the said sheet is mainmeans including a rotatable crank, and a crank tained in such xed position, said last mentioned 1 arm pivotally connectedat one end to .said crank and at itsopposite end to said bracket, means for rotating the abrading wheel during swinging y movement thereof, and means carried by the vbracket for counter-balancing said abrading wheel.

3. In a machine for grinding the corners` of i glass sheets, asupporting framework, a substantially; horizontal supporting runway carried by.V f

saidframework and adapted Vto Vsupport a plu- "rality of sheets to be ground on edge in xed sub,-

stantially vertical position, said runway having a plurality `of spaced grooves for receiving the lower edges of the said sheets therein, horizontally spaced bearing brackets carried by the framework, a horizontal shaft journaled in said bearing brackets, a swingable carriage keyed to said shaft, an abrading wheel carried by the carl riage and having a plurality of peripheralgrooves in substantial alignment with'the grooves in said runway, means for swinging said Ycarriage to` move the abrading Wheel bodily vertically through anarc in a plane parallel with the plane of thei-V sheets andl in engagement with lthe corners thereof, and means forv rotating the abrading wheel. Y

4. In a machine for grindingl the corners of `glass sheets, a supporting framework, a'series of substantially horizontally aligned rolls carried by'said framework andadaptedl to support a plurality of sheets to be ground on edge inxed substantially vertical position, said rolls having a Aplurality of spaced grooves for receivinguthe.

lower edges of the said sheets therein, means` rengaging the sheets for maintainingthem in proper vertical position, horizontally spaced bearing brackets carried by the framework, a

horizontal shaftjournaled in said bearing brackets, a swingable carriage keyed tosaid shaft, an

abrading wheel carried by the carriage and having a plurality of peripheral grooves in substantial valignment with the grooves in said rolls,

means forswinging said carrage` to move the` abrading wheel bodily vertically through van arc in a :plane parallel with the `plane of the sheets and in engagement with the corners thereof,

means for rotating ther abrading Wheel, and .means for counterbalancing said swingable carriage. l

RAOUL J... LOUVIAUX.

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