US2561146A - Mill roll stand - Google Patents

Description

K., SIEG MILL ROLL STAND July 179 1951 '7 Sheets-Sheet 1 Filed June 10, 1947 INVENTOR ATTORNEYS K. SIEG MILL ROLL STAND July E7, 1951 '7 Sheets-Sheet 2 Filed June l0, 1947 BY @uw I lll July 17, 1951 K. SIE@ 2,561,146

MILL ROLL STAND Filed June l0, 1947 '7 Sheets-Sheet :5

INVENTOR Kam? ATToRNEYs I July l?"s 195i K, 51E@ 256km@ MILL ROLL STAND Filed June lO, 1947 7 Sheets-Sheet 4 ATTORNEYS Y July 17, 1951 K. SIEG MILL ROLL STAND '7 Sheets-Sheet 5 Filed June 10, 1947 I Il... Il.

Il III.

INVENTOR ATTORNEYS BY QW 74W July B7, 1951 Filed June 10, 1947 Ei-till.

K. slEG 2,561,146

MILL ROLL STAND '7 Sheets-Sheet 6 i @l J l NVENTOR Kar/f Szy BY 7, mi LM ATTORNEYS 1 l I K. SlEG MILL ROLL STAND July 17, 1951 Filed June l0, 194'? '7 Sheets-Sheet '7 ATTORNEY Patented July 17, 1951 MILL ROLL STAND liar! Sieg, Philadelphia, Pa., assigner to Samuel M. Langston Co., Camden, N. J., a corporation of New Jersey Application .i une 10, 1947, Serial No. '753,689

14 Claims. 1

This invention relates to mill roll stands for the same general purpose as that shown in the Behrens Patent 2,405,637, issued August 13, 1946, and in which a heavy roll of sheet material is supported at the ends of a pair of pivotally mounted arms which may be moved toward and from each other along a cross-shaft to engage rolls of different lengths, and may swing in vertical planes to raise and lower the roll. This roll is rotatably supported at the ends of the arms so that the sheet material may be unwound and delivered to a machine which may perform any of a variety of operations thereon.

In many machines of this general type the pair of arms are mounted on the rotatable crossshaft, and the power for effecting the raising and lowering of the heavy roll is usually applied to the shaft through gearing. The movement of the arms toward and from each other to engage the roll, and the simultaneous movement of the arms in the same direction to shift the roll axially, is effected by sliding the arms along splines or keys on the shaft.

Where the roll is of very large diameter and great length, it is necessary to make the crossshaft also of large diameter. As the keys and keyways are subjected to great pressure in resisting relative angular movement ofthe arms and shaft, it is difficult to slide the arms along the shaft in adjusting the roll endwise to the proper position after it has been lifted. Furthermore, if gears be employed for rotating the shaft to lift the roll, the gear teeth must be large and strong to resist the very great stress exerted both during the lifting operation and while holding the roll in raised position.

One of the main objects of the present invention is to provide an improved construction of roll lifting, supporting and adjusting means, whereby it is not necessary to use either keys or keyways on the shaft, or any gear on the shaft for effecting the raising movement.

As one important feature of my invention the pivoted roll supporting arms are mounted on carriages slidable along the main frame, and are raised and lowered by the action of jack screws also mounted on the carriages, rather than by the rotation of a shaft supporting the arms.

As a further important feature, threaded means are provided. for simultaneously moving the carriages, together with the roll supporting arms and their lifting jacks, toward and from each other, to engage or disengage the ends of the roll. This means preferably includes a shaft having right and left hand threads.

As a further important feature, means are provided for simultaneously moving the carriages, together with their arms and lifting jacks, in the same direction, to properly line up the sheet with the machine to which it is to be delivered, and this means preferably acts to move endwise the aforementioned shaft.

As a further important feature the roll supporting, lifting and adjusting mechanisms are provided in duplicate on opposite sides of the main frame. so that one rool on one side of the frame may be lifted and held in proper sheet delivery position while a sheet is being unwound from a roll on the other side of the frame; or so that sheets of the same or different widths may be simultaneously unwound from two rolls and delivered in slightly overlapping relationship, to produce a product of greater width than that of the sheet of any roll which may be in stock at the time.

As a further important feature, means are provided whereby one arm may be raised or lowered in respect to the other to slightly tilt a roll in case it be wound more tightly at one end than at the other, and to prevent tearing of the sheet.

As a further feature, there are provided a plurality of electric motors mounted on the machine so that the various movements of the arms may be easily and quickly effected.

Various other important features as well as advantages will be pointed out hereinafter, or will be apparent from a consideration of the apparatus illustrated, and the following description.

In the accompanying drawing showing certain embodiments of a machine embodying my invention:

Fig. 1 is a perspective view of one side of the machine.

Fig. 2 is a sectional detail of a clutch used when raising or lowering one arm in respect to the other.

Fig. 3 is a plan View, partly in section, showing one arm.

Fig. 4 is a sectional detail at right angles to a part of Fig. 3.

Fig. 5 is a side View, partly in section, of the arm.

Fig. 6 is a side View, partly in section, of the outer end of an arm.

Fig. 7 is a vertical section through a part of the frame, and showing .the carriage and roll lifting mechanism.

Fig. 8 is a perspective view, partly in section, of the arm lifting means.

Fig. 9 is a perspectve view of the drive end of the machine, similar to the left hand end of Fig. 1, but showing all three adjusting motors at the same end.

Fig. 1 0 is a sectional detail of the clutch shown in Fig. 9.

Fig. ll is a perspective View of a portion of the drive end showing the means for moving the arms simultaneously in the same direction.

Fig. l2 is a somewhat diagrammatic planview showing arms positioned for supporting two rolls with the sheets in slightly'overlappingv relation ship, and

Fig. i3 is a diagrammatic end View showing the simultaneous delivery of twp sheets. Y

IThe main frame, as shown particularly in Figs. 1 and 7, includes apair of end frame elements, preferably in the form of parallel vertical plates 2dv and 2da, which maybe secured inselected fixed positions by -means of base flanges 2i. Bef

tween these twov end .frames is -a transversely extending frame element constituting a cross frame, and preferably in the form of a plate 22 disposed in a verticalfplane and secured to and supported by t.-e plates Eil and-26a. As shown;

particularly in Fig. '7,' the plate 22 h-as top and bottom plates 2S and 2a disposed in horizontal planes. The roll supports are carried bythese plates 23 and 2li, and are adjustable along the length thereof and angularly in vertical planes atright angles to the' plane of the vertical plate.

The top and bottom plates 23 and 213 are each provided on their under and upper surfaces, respectively, with two pairs of rails 25, one pair sing lon each side of the vertical central plate d'2.' The plates'2f,`23 and 2t in effect form an I beam.

' which are connected by a back plate'l and have at their outer edges the bearings 28 for the sleeve 2da. As shown in Fig. '7, the carriage at its upper end is vprovided with a roller 3l fitting between the two parallel depending rai1s25 of the top plate 23 and a roller 32 for engaging the under surface. of one of the rails. `Likewise, at the lower end of the carriage there are similar rollers 3i and 32' engaging'the rails25 of the lower plate 2li. Thus the carriages carrying the arms may move transversely of the frame, and are prevented from tilting.

For moving the arms toward andxfrom, each other to engage. or :release a roll of paper, the shaft 21 has one endportion provided with right hand screw threads and the otherendiportion' provided with 'left hand threads which engage nuts 3d, as shown in Figs. 3 and 4, and-which are `normally locked against rotation by a spring pressed pin 35 engaging afrecess in the nuts, as shown in'Fig. 4. Thisrecessiis'preferably in a flange on the nut, and the ange is-held between ball bearings on the side plate of theacarriage. Normally, any rotation'` of the shaft 21 will move the arms toward or from each other, but upon pulling out the pin 35 of one arm against the action of the spring 39, and'Y rotating the shaft, that arrn will remain stationary because the nut can freely-rotatabut the 'other arm will move in the direction and to the extent desired.

The shaft 21 is driven by a reversible motor 3e which, as shown in Fig. 9, has a pinion 31 connectedL through a train of speed reducing gears 31 and 31" to a gear 38 keyed on the shaft 21.

To grip a roll between the arms, the motor 36 isA started in the proper direction to bring the two arms toward each other and. engage the chucks, hereinafter described, into the ends of the core of the roll. To prevent stalling of the ,10, motor when the chucks are in the desired positions in the roll, there is provided a slip friction clutch inthe driving connection between the moktor-36 and the shaft. This is shown as a clutch member 4B secured to the gear 31 and a cone ,15 il keyed, on the shaft of the motor and held in by a spring, as shown in Fig. 1-0.

For moving the arms simultaneously in the same direction properly to align the sheet with 4,the-iworlror the-,sheet :receiving machine, there 2o is provided means for moving the shaft 2,1,end-

",wisewithout rotating it, and t0 thereby carry ,fbotharrns tothe proper position.A `One means VVVfor'f'accomplish-ing thisresult is shown. particularlyin Fig. 11.

One end of the shaft 21 is mounted in .bearings in asocket i2 which is slidable in a tubular casing d3. rlhe bearingsareof a `thrust type, s0 that any endwise Ymovement of thesceket 42 results in a correspondingendwise movement of the shaft 21, but -the shaft lmay freely rotate in =the socket. The socketl'li.- is soheldinthe casing i3 that rotation of thesocket is,y prevented. This may be eifected'by any suitable means, such Yas a key fit. The socket 4,2 is Vprovided with an .35 nextension d5 which is threaded inanutflv mountf ed in thrust bearings for `rotation in theecasing f t3. The outer end of the nut is securedto a gear Y wheel l1 whichfmeshes with a.pinion,.4 8 on the same shaft lilas is a large gear,` 50,- and this last Lldimentioned-gear meshes with al pinion 5l of a reversible motor 52. Thus, by means ofthis motor the nut d@ may be rotated tomovethethreadedV member l5 endwise in either direction, and Jthus pull or pushthe shaft 21 withthe roll sup porting arms axially tothe desired position. The ff; motor may bemounted in anyfsuitable position. In Fig. ll it is shownnext to ,the `n'xotor, but ,-inFig. 9 it is indicatedas beingbelowthe motor Biiand in front ofrthe threadedextension 45. -As previously noted, the arms 26 are, movable along the shaft 2l, and are held through sleeve 25min bearings 2S on the sideplates 29. of the carriage For swinging the arms `vertically to raisev or lower a roll; there isprovided a screw jack including a jack shaft 54 extending trans- ;Versely of the machine parallel to the shaft 21 and supported inbearingslllig. 2). On this shaft there are a pair,,of-wormsaeachimeshing with a correspond-ingworm wheel-'5l' disposed in afhorizontal plane lbelov,f..t1f1e read-end, of its ,-g corresponding .2@ snd1-held`v against rotation 1; in; respect to -thelfj ach-shaft.` by a lgeydilldir Thus, as the arms 2t adjusted toward van ifrorn each 'other aleng'theshaft it byrrotationof the shaft 21, the bearings ,wi-llmove-thewormsd along ,the -sh-aft and lceepthein insmesh withgtfheir respective worm wheels 51. This worrnpwheel is .xfniounted on agrcllerbearing-QSS and; is rigidly connectedto asoclzet-membergd whichvhas a spherical surfacerengaging a1 ball,member.vr 6I) on an upright screw 6 l `The lower' end 0f .this screw 1 lshaft is seated on athrust bearing-62fhaving a ball headI concentric with thesurfacegofzthe ball member tt. rThe ./balll t member uw; is Aprovided with a pair of stub shafts 53 provided with bearhing blocks B4 slidable in vertical slots in a ring 'the shaft 54. The upper end of the screw shaft 6l is threaded in a nut `E31 which is journaled on pins 69 mounted in the two side branches or forks 26 of the arm 2t which is disposed between and held against lateral movement by the side members 29 of the carriage.

The shaft 54 -at one end is connected by gearing 11a to a reversible motor 1I. In Fig. 1 this motor is shown at the opposite end of the machine from the motors 35 and 52, but in Fig. 9 all of the motors are shown at the same end. Thus, by energizing the motor the shaft 54 may be rotated in either direction and the power transmitted through the gearing 56, 51, and the swivel joints 63, 64, to rotate the screw shaft 6l. As this shaft rotates, the arms 29 are swung in vertical planes to raise or lower the roll. As the arms are pivoted, the nut 51 travels in an arcuate path, and the screw shaft 6l swings about the thrust bearing 62, but power is properly transmitted to the screw shaft regardless of the angular tilt of the latter,

In some cases it is desirable to raise or lower one arm in respect to the other so as to draw paper more effectively if the roll be tighter at one end than at the other. To permit this, one of the arms has its gear 56 lkeyed on or integral with a sleeve 59 normally locked against rotation in respect to the shaft. As shown in Fig. 2, there is provided a sleeve 10 keyed to the shaft and having lugs 12a normally engaging sockets 12 in the end of the sleeve 59 lso that the parts must rotate together. The sleeve 10 is held in locked position by a spring 13, and may be pulled out against the spring by a handle M. Normally the parts are in the position shown in Fig. 2, but by pulling the sleeve 1U out against the spring, the sleeve S9 is released from the shaft so that by rotating the shaft 54 the other arm may be raised or lowered without changing the position of the released arm, because it is held by the selflocking gearing 56, 51. Various other means may be employed to adjust one arm vertically without adjusting the other, and normally all of the motors and gears are enclosed in a protecting casing, as shown at 15 in Figs. 12 and 13.

'Ihe roll may be supported by and between the two arms 26 in any suitable manner. As shown particularly in Figs. 3, and 6, each arm at its outer end has a transverse pin 83 J'ournaled in suitable bearings, and the pin at one end has a conical chuck 8d which may be forced into the end of the roll by the movement of the arms tow-ard each other through the rotation of the shaft 21. Each pin 83 at the outer end has a brake drum `85, and pivotally mounted on the side of the arm are a pair of brake shoes 86 which may be applied with the desired pressure against the brake drum by means of a clamping screw 91. 'Thus the tension on the sheet while it is being unwound may be -varied as desired.

A modified form of expanding chuck is shown in Fig. 6. Here the chuck 84 has a number of longitudinal grooves 90 arranged around a conical surface, and with the inner sides of each groove inclined to the axis. A shoe 9| slides in this groove and is pushed endwise by a, spring 92 engaging the collar 93. The chuck is inserted in the end of the roll, and as it is forced into the roll the collar 93 forces the shoe along the 6 inclined grooves, the shoe is forced outwardly, and as it slides back the roll is tightly clamped on the chuck. The spring re-positions the collar and shoes when the chucks lare drawn out of the roll.

As one important advantage of applicants novel construction, and as one important feature of it, the apparatus which is shown at the left of the main vertical frame plate 22 may be duplicated upon the opposite side, and each lifting mechanism provided with its own actuating motors and driving connections. While a roll of material supported on one pair of arms is being delivered, a second roll may be brought into place and mounted between the arms on the other side of the frame, and adjusted to the proper position. Thus, as soon as one roll is exhausted, the sheet from the other roll may be immediately delivered without stopping the machine. In some cases it is desired to employ a sheet of greater width than that of any rolls in stock, as shown in Fig. 12. In that case, the arms on one side of the frame are so adjusted in respect to the position of the arms on the other side that two sheets, A and B, may be delivered at the same time, in slightly overlapping position. Such a sheet may be the liner sheet or the inner corrugated sheet in the manufacture of corrugated board, or may be for any other purpose for which the sheet receiving machine is designed or intended.

The arms are of such length that when in raised positions rolls may be moved axially beneath the arms to proper positions directly beneath the ends of the arms, so that they may be readily engaged by the chuck when the arms are lowered, and whereby when the rolls are lifted by the arms, this web on one side of the cross frame may pass freely over the latter and be delivered in the desired overlapping relationship to the web delivered from the other roll.

Having thus described my invention, what I clatim as new and desire to secure by Letters Paten 1s:

1. A mill roll stand having a stationary cross frame, a pair of carriages supported thereby, a pair of arms, one pivoted on each carriage for supporting a roll therebetween, a shaft with right and left hand threaded parts for moving said carriage toward and from each other, said arms being pivoted about the center of said shaft and having nuts engaging said threaded portions and held against endwise movement in respect to said arms, and means for rotating said shaft.

2. A mill roll stand having a stationary cross frame, a pair of carriages supported thereby, a pair of pivoted arms, one mounted on each carriage for supporting a roll therebetween, a shaft, means operatively connecting said shaft to said arms, means for rotating said shaft to move said arms toward and from each other along said frame, means for moving said shaft endwise to move said arms along with and in the same direction as the shaft, and means forv swinging said arms about said shaft as a center.

3. A mill roll stand having a stationary cross frame, a pair of carriages supported thereby, a pair of shafts supported by said frame, a pair of arms, one mounted on each carriage, and both pivoted about the center of one of said shafts, and means connecting said arms to the other shaft for swinging said arms about their pivotal center.

4. A mill roll stand including a stationary cross frame, a pair of carriages slidable therealong, a,

averses l pair'f parallel arms, one pivoted onpeach ,ofA lsaid oa'rragsf'or supportingl aroll, a pair of upright screw jacks "dn said carriages each engaging 'acorrespnding one of said arms' forfswingingjthem in vertical planes, and means for operatingY said screw jacks simultaneously.

5; A mill roll stand including apair of carria'g''s movable toward and from each other, arms pivt'ed intermediate of their ends on said id arriages, a pair'of parallel shafts, means atene end ofeach 'of saidarms for supporting a roll; mean's at the opposite endl of each of said ,arms andQperatively connected to one of said shatsior 'swingingsaid Varms in vertical planes, i,and means operatively connected to the other shaftfor movingsa'id armsV toward and from each other.`

f6. 'A mill roll'stand including a frame, apair of carriages thereon and movable towardfalld fromeaoh other, apair of arms `pivoted,intermediate 'cf theirends onsaid'carriages means L at'one end'of each or said arms forsupporting a roll, a pair of substantially verticallyvl disposed screw shafts one at the other end of veachjof Asaid arms, and means for rotating said screw Vshafts and' thereby swinging said arms in vertical planes.

7. A mill roll stand having a frame ,aipair of carriages supported'therebyand movabletherealong, a pair of horizontal shafts, apair 'of arms pivotally mounted to swing about the center of 'one of said shafts, means for moving saidlast mentioned shait endwise to impart corresponding'movement to saidarms, means for rotating saidlast'mentioned shaft and lthereloy moving 'said arms toward and from each other, and means forrotating theother shaft andther'ebyswinging the arms about the first mentioned shaft ,as an axis.

8; A mill roll stand including a frame, a .pair of carriages mounted thereon and movable `toward and 'from each other, a pair of arms, one piVoted arms and fcarriagestoward and from each/other upon rotating said shaft, and means for'noving 'said shaft end wise to sirnultaneouslyumove said arms and carriageshin the same ;dire cton. v,n

12. A mill roll stand having a/stationaryframe,

,a pair oi carriages rmovable along said frame., a pai'r of arms onepivotally melllted on each carriag'ega pair of 'upright screws oneven eaehfearriage' and operativeiy connected to thev correspon'ding arm, a transverse shaft, and geringon r`each carriage operatively connecting said transverse shaft to its corresponding screw and slidable 'along said rs't mentioned shaft as said carriages are moved along said frame. l, 13.- A construction as ldefined in claim v 12, in which the screws arepivotally connected to said gearmg...

14;' A mill rollj stand having a frame, a pair of carriages movable along saidrame, a pair of roll lifting arms each; pivotally mounted on a ,sepa- .rate one of said carriages, ashaft on said frame on each carriage; an upwardly extending jack shaft pivotally mounted on each carriage and having threaded engagement with its corresponding arm, and means engaging each jack shaitadjacent to its pivotal center for simultaneously rotating said. jack shafts to swing said arms.,

9. A mill roll stand includingaV pair of. ,car riages, a pair of shafts each journaled in ,both

carriages, a pair of arms, one pivotally supported on each carriage, means for swinging said arms upon rotation of one of said shafts, means 'for moving said carriages toward and fromeach other upon rotating the other shaft,l and means for moving said arms simultaneously inthe same direction and lengthwise of the stand upon endwise movement of said last mentioned shaft.

10. A mill roll stand including'la cross frame, f,

two parallel shafts journaled therein, a pair of and having yright and left hand threaded connections ,to said carriages respectively, whereby upon rotating said shaft said carriages are moved toward and from each other, and means formov- .ing said shaft endwise to bodily move said carriages in'thesame direction. l ,y

KARL SIEG.

RENCS orrED The following references are of' recordin' the illof this patent: j Y Y UNITED v sTA'rris Ars Number.

Name Date 527,879 Potter oct. 23.1894 1,93o.o74 Bentley oct. 10,1933 1,957,122 wood May i, 1,934 2,066,377 waan et ai ,Jan 5, 1937 2;14o.92s 'raient et ai Dec. 20, 1938 2,177,577 Mikaeison' oct. 24,1939 2,195,141 woes et a1 Mar. aeg-'i940 2,405963'7y Behrens Aug. 13,1946 2,490g685 Greene Dec. s, 1949

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