|Publication number||US2658693 A|
|Publication date||Nov 10, 1953|
|Filing date||Feb 28, 1950|
|Priority date||Feb 28, 1950|
|Publication number||US 2658693 A, US 2658693A, US-A-2658693, US2658693 A, US2658693A|
|Inventors||Wolf Lloyd J|
|Original Assignee||Twin Disc Clutch Co|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (12), Referenced by (6), Classifications (11)|
|External Links: USPTO, USPTO Assignment, Espacenet|
Nov. l0, 1953 l.. J. wouwINnING MECHANISM 2 sheets-sheet 1 Filed Feb. 28, 1950 Nov. 10,` 1953 L. J. WOLF WINDING MECHANISM 2 Sheets-Sheet 2l:
Filed Feb. 28. 1950 a ,/Z// fag. I
Patented Nov. 10, 1953 Lloyd J. 'Wolf, Racine, Wis., assigner to Twin .Disc ClutchfCnm-pany, Racine, Wis., a corporation of Wisconsin Application February 28, 1950, Serial N o. 146,663
4 claims. l
My invention relates to a winding vmechanism for handling `web `or lstrip `maiwrrialunder constant tension while the web is periodically moved 'inopposite directions through coating, dyeing or other conditioning material.
In `-rnechanisms as new employed, the web is alternately wound on one roll while being unwound from another rol-l and, between the rolls, the web is passed through `one or more bathscontaining `the'liqu-id tope applied. After each traverse of the web through the baths, the direction of movement of the web is reversed and these reversalscontinue until the desired `conditioning or treatment of the web has been completed. `A
serious problem with such mechanisms :is the maintenance of'Y a substantially' `constant tension on the web during both directions. of movement between theroils. I
It is therefore one object of -my invention `to devise a winding mechanism in which a web material is periodically moved 1in opposite directions between a pair of rolls which alternately act as winding and unwind'ing rollsland in `which provision isl made `for maintaining constant tension on the web.
A further object is to providev a mechanism. `of the character indicated in which the `rolls are individually connected to independent power sources `through power transmissions., that transmission which is` connected to the winding roll being arranged vto automatically `and `instantaneously adjust its outputispeed and'torque to meet varying load conditions while `the other transmission functions asva brake, both .transmissions cooperating `to maintain alsubstantially constant `tension onthe web.
These and furtherobjects of the invention will be set forth in vthe following specification, refer- `ence being had to` the accompanying drawings andthe novel means by which said objects are eifectuated will be-denitely pointed out in the claims.
In the drawings:
Fig. 1` is a sectional elevation cfa power transmission forming part `ofthe winding mechanism.
Fig. 2 is a diagrammatic elevation of a'windi'ng mechanism `which incorporates the transmission shown in Fig. 1.
Fig. 3 is a plan view ofthe mechanism shown Referring` to Fig. l,` the numeral Nl designates Aan input shaftyhaving keyed thereto apulley II and whose delivery end is connectedto one end of. anannular housing `I2 formingpart oran hydraulic couplingfIS. The housinglz includes .2 spaced, `transverse walls which `are respectively provided internally `of the housing with a plurality of radial blades f4 and I5 to thereby form `the spaced, facing and connected impellers I6 and IT, respectively, of the coupling and which cooperate in the usual manner with twin runners or turbines presently described.
Bolted to the other'end ofthe housing I2 is an internal ring gear I8 forming part of a `planetary gear train I9. The ring gear I8 meshes with `a plurality of planet pinions 20, each of `which Vis journaled on a stub shaft 2I mounted in acari-ier 22 that includes a sleeve 23 keyed `or splinedly connected `to a shaft 24 coaxial with the impellers. The left end of this shaft, as viewed in Fig. 1, is piloted in a, bearing 25 whose outer race is .mounted in a sleeve 26 having a flange portion gripped between the flanged end of the shaft 'I0 andthe adjacent, transverse wall ofthe housing I2. The opposite-end of the shaft 24 is journaled by means presently described.
Oppositely facing, bladed runnersl 21 and 28 are symmetrically positioned `between the impellers I6 and I'I in working `relation thereto, respectively, and their linner portions `are secured to :a `hub 29 which `is keyed or splined `to theshaft 24. Accordingly, the rotating speed ofthe planet pinion `car- Iier 22 .is always equal to that of `the runners. Leakage of liquid from the coupling at the `right `end is prevented by a bellows seal -generally indicated by the numeral 30 and at the opposite end bythe 'inner end ofthe shaft I 0.
`'The planet pinions 20 also mesh with a sun `gear 32 which i's journaled on a sleeve 33 that fits ronthe shaft 24. The sun gear 32 isprovided with an `extension 34 that is keyed to an output 4member, denoted by the pulley 35, which includes `a sleeve 36 .journaled in a bearing 31 that is mounted in a supporting frame38.
The winding mechanism which includes the above transmission is schematicallyillustrated in Figs'. 2' and 3 to which reference will now be made, parts which are identical with those .shown in Fig. l 1 being designated by the same numerals. It includesa rst winding roll 33 having fast :to oneend thereof a pulley 4I) which is connected to the output pulley 354of a power transmission, 'inciuding the coupling I3 andgear train I9' as shown in;Fig. l. The input pulley I"I of the 'transmission connects with a motor 42 which runs at constant speed in `a clockwise direction as shown in Fig. 2. A second winding roll 43, spaced a convenientdistance from the roll38, has fast on one end there- `of a pulley '44 which is; connected to the output pulley 35er a Apower transmission, identical with V tion may be provided between the rolls 41 and `48, such as gears (not shown), and that the surfaces of these rolls are related so that they exert a gripping or pinching action on the web 5I passed therebetween and move the web at a substantially constant linear speed. The drivingY and gripping relations of rolls of this type are well known in the art.
Baths 52 and 53 for holding the treating or conditioning liquid are located between the gripY ping rolls and the winding rolls 39 and 43 and idler rolls 54 and 55 are mounted in the baths 52 and 53, all respectively. The web 5l extends between andV has its opposite ends apadjust to this varying load condition. The available horsepower therefore remains substantially constant and the motor 46 operates under optimum conditions. Further, the relative slip of the runners 21 and 28 in the transmission connected to the roll 43 are controlled by the gear ratio of the gear train so that heating of the coupling never exceeds that which can be adequately -cooled.
It will fbe understood that at the beginning of the operation, i. e., when the roll 43 is emptyror propriately secured to the winding rolls 39 and 43 and between the latter rolls, it extends partially around the idler rolls 54 and 55 in the respective baths and also between the gripping l rolls 41 and 48 whose engagement with the web is sufficient to move the same in the directionV determined by the rotation of the latter rolls. The baths 52 and 53 are'merely intended to illustrate a typical use of the mechanism and do ,not form any part of the invention. Y
In the operative condition as shown in Fig. 2,
the web 5l is moving from right to'left, i. e., it' is being unwound from the roll 39 and wound on Y the roll 43. Accordingly, the motor 59 is rotating counterclockwise and since the motor 46 is `rotating inthe same direction, the latters drive of the winding roll' 43 also moves the web in the same direction and maintains a vsubstantially constant tension on the web between the nearly empty, its rotational speed is considerably greater than when the roll is fullror nearly full. In otherV words, this roll speed varies from a Ymaximum to a minimum during the winding operation, with the web 5I being fed to the roll 43 at a substantially constant linear speed. The mechanism automatically compensates for these rotational speed changes through the rotational slippage provided by the planetary gear and coupling and at the same time constantly increasesV itsV torque delivery so as to maintain a substantially constant pull on the web as the combined Ydiameter Yof Vthe roll 43 andthe wound web increases. On the other side of the gripping rolls 41 and 48, the web 5l Yis drawn thereby at sub- Y stantially constant linear speed from the then roll 43 and the gripping rolls 41 and 48.l At the same time, the 1notor'42 is rotating in a clockwise direction which means that the impellers I6 and Hof the connectedtransmission are rotating in the same direction, but the pull of the gripping rolls 41 and 48 rotates the roll 39 in an unwinding or counterclockwise direction and this rotational movement is imparted through the planetary gear of the latter transmission to the runners 21 and 28 thereof which accordingly rotateV oppositely to the cooperating impellers. Hence, the hydraulic coupling I3 that is connected to vthe roll 39 acts as a hydrodynamic brake on the web movement in the direction shown in Fig. 2 and serves to maintain a substantially constant tension on the web between the roll 39 andthe gripping rolls 41 and 48. Y Y The'rotational speed of the output pulley 35 of the transmission that is connected to the roll 43 is controlled by the load imposed thereon and the interaction between the component parts of the planetary gear train arising from the coloperative action of the mechanical and hydraulic unwinding roll 39 and the coaction between the Y Y gripping rolls and the roll 39 also maintains a. substantially constant tension on the portion of the web therebetween. y
When the roll 39 has been unwound sufficiently, the motor 59 is reversed in an appropriate manner, but the motors 42 and 46v continue to rotate in the directions indicated in Fig. 2. The
roll 39 then becomes the winding roll and the rollV 43 the unwinding roll so that the web 5| moves from left to right` Under these conditions, the transmission connected to the roll 39 functionsY in the same manner as described for Y `the transmission connected to the roll 431When Ythis was being wound, and the latter transmission then 'acts as a brake, all to maintain the'web tension substantially constant. The web move ment is periodically reversed in the above manner until the desired conditioning has been accomplished.
. I claim: Y
1. Winding mechanism for web materialcomprising a pair of rolls, reversible gripping means between which the web ispassed for alternately movingV the web in opposite directions between drives of the latter transmission. They load on the output pulley 'of the' transmission 45 is represented by the winding roll 43 for the'web Vdirectim shown andl its increasing weight as Ythe web is wound therearound. Due to the flexible j characteristics of the last/named transmission 4arising from the ability of ,its coupling and planetary gear train components to respectively rotate relative to each other, the output speed 'and torque automatically Vand instantaneouslyr the rolls to direct the web towards one roll orf winding thereon whilev unwinding from the other 1roll, and transmitting means for each roll'including an hydraulic coupling having an impeller driven at constant speed in a direction to wind the associatedroil, a runner cooperably related to the impeller, and planetary gear means interposed between the runner and the associated roll including `a plurality of gear elements,
one of the elements being connected to the im peller, VanotherV element being connected to,V the runner and another Yelement being connected toY the associated roll, one coupling serving to transmit power to one ofA the rolls for winding and to arssistthe movement -o the Vweb and the other coupling acting as a hydrodynamicV brake on the unwinding ofzthe other roll whereby asubstantially constant tension is maintained on the web in each direction,v and. each planetary gear l V means automatically adjusting .tol the changing torque requirements as the weight of 'the' asso.- ciated roll changes.l f Y l j abvvindifngrneenanism Vfojr'web materialV 'cmprising a pair of rolls, reversible gripping means between which the web is passed for alternately moving the web in opposite directions between the rolls to direct the web towards one roll for winding thereon while unwinding from the other roll, and transmitting means for each roll including an hydraulic coupling having an impeller driven at constant speed in a direction to wind the associated roll, a runner cooperably related to the impeller, and planetary gear means interposed between the runner and the associated roll including a ring gear, a sun gear and a carrier supporting a plurality of planet pinions in mesh with the gears, the ring gear being connected to the impeller, the sun gear being connected to the associated roll and the carrier being connected to the runner, one coupling serving to transmit power to one of the rolls for winding and to assist the movement of the web and the other coupling acting as a hydrodynamic brake on the unwinding of the other roll whereby a substantially constant tension is maintained on the web in each direction, and each planetary gear means automatically adjusting to the changing torque requirements as the weight of the associated roll changes.
3. Winding mechanism for web material cornprising a pair of rolls, a pair of gripping rollers between which the web is passed to move the same towards one roll for winding while unwinding the other roll, a power transmitting means for the winding roll including an hydraulic coupling having an impeller driven at constant speed in the direction of the winding roll, a runner cooperably related to the impeller and planetary gear means interposed between the runner and the winding roll including a plurality of gear elements, one of the elements being connected to the impeller, another element being connected to the runner and another element being connected to the winding roll, and a transmitting means for the unwinding roll including an hydraulic coupling having an impeller driven at constant speed in a direction opposite to that of the unwinding roll, a runner oooperably related to the last named impeller and planetary gear means interposed between the last named runner and the unwinding roll including a plurality of gear elements, one of the last named elements being connected to the last named impeller, another last named element being connected to the last named runner and another last named element being connected to the unwinding roll, the last named coupling acting as a hydrodynamic brake on the unwinding roll to assist in maintaining a constant tension on the web and each planetary gear means automatically adjusting to the changing torque requirements as the Weight of the associated roll changes.
4. Winding mechanism for web material comprising a pair of rolls, a pair of gripping rollers between which the web is passed to move the same towards one roll for winding while unwinding the other roll, a power transmitting means for the winding roll including an hydraulic coupling having an impeller driven at constant speed in the direction of the winding roll, a runner cooperably related to the impeller and planetary gear means interposed between the runner and the winding roll including a ring gear, a sun gear and a carrier supporting a plurality of planet pinions in mesh with the gears, the ring gear being connected to the impeller, the sun gear being connected to the winding roll and the carrier being connected to the runner, and a transmitting means for the unwinding roll including an hydraulic coupling having an impeller driven at constant speed in a direction opposite to that of the unwinding roll, a runner cooperably related to the last named impeller and planetary gear means interposed between the last named runner and the unwinding roll including a ring gear, a sun gear and a carrier supporting a plurality of planet pinions in mesh with the gears, the last named ring gear being connected to the last named impeller, the last named sun gear being connected to the unwinding roll and the last named carrier being connected to the last named runner, the last named coupling acting as a hydrodynamic brake on the unwinding roll to assist in maintaining a constant tension on the web and each planetary gear means automatically adjusting to the: changing torque requirements as the weight of the associated roll changes.
LLOYD J. WOLF.
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|U.S. Classification||242/412.1, 242/535, 242/538, 242/415.1, 242/545.1, 242/415, 242/422.2|
|International Classification||D06B3/32, D06B3/00|