US3216279A

US3216279A - Control mechanism for the take-up roll of a winding machine

Info

Publication number: US3216279A
Application number: US247023A
Authority: US
Inventors: Joseph H White
Original assignee: Individual
Current assignee: Individual
Priority date: 1962-12-26
Filing date: 1962-12-26
Publication date: 1965-11-09
Anticipated expiration: 1982-11-09

Description

Nov. 9, 1965 J WHITE 3,216,279

CONTROL MECHANISM FOR THE TAKE-UP ROLL OF A WINDING MACHINE Filed Dec. 26, 1962 2 Sheets-Sheet l I M 42 24 Q. 4/ PUMP 52 /5 /40 pumtgfi 46 2/ /6 a4 6 78 INVENTOR JOSEPH H. WHITE BY flmlow W144,

ATTORNEYS.

2 SheetsSheet 2 J. H. WHITE INVENTOR JOSEPH H. WHITE ATTORNEYS CONTROL MECHANISM FOR THE TAKE-UP ROLL OF A WINDING MACHINE Nov. 9, 1965 Filed Dec.

United States Patent 3,216,279 CONTROL MECHANISM FOR THE TAKE-UP ROLL OF A WINDING MACHINE Joseph H. White, Centredale, R.I. (F arnum Pike, Esmond, R.I.) Filed Dec. 26, 1962, Ser. No. 247,023 Claims. (Cl. 74-675) This invention relates to a machine which will wind web material such as fabric, paper, film, wire or the like from a starting small diameter to a roll or reel of any required diameter or will act in the opposite manner to control the unwinding of such a package.

In the use of machines of this character heretofore, the material to be wound has usually been supplied to the machine or winder at a constant speed, and some complications have ensued in maintaining the tension at the take-up package uniform due to the changing diameter of the package as the material is wound or unwound thereon. A change of revolutions per minute of the take-up package is necessary, and this is usually taken care of by the means of a slipping belt. Also as the takeup package changes in diameter, its weight changes requiring a different amount of horsepower to drive it, which is another variable which must be taken into consideration.

One of the objects of this invention is to provide a mechanical means for automatically holding the tension on the work the same throughout the operation of the take-up roll.

Another object of this invention is to provide frictionless means which will automatically hold the tension the same throughout the entire roll as the reeling occurs.

Another object of the invention is to provide a mechanical means for accomplishing this uniform tension so that the attention of the operator may be reduced to a minimum.

Another object of the invention is to provide a control which will provide a light tension or substantially tensionless web as it is accumulated on a roll up to any diameter.

Another object of the invention is to provide adjustments so that the machine may be set to accommodate the reeling or unreeling of web material of varying thicknesses.

With these and other objects in view, the invention consists of certain novel features of construction as will be more fully described and particularly pointed out in the appended claims.

In the accompanying drawings:

FIG. 1 is a schematic view illustrating diagrammatically the hook-up of the various mechanisms which go into accomplishing the desired result;

FIG. 2 is a top plan view of a fragmental portion of the machine illustrating a part of the control mechanism;

FIG. 3 is an elevation of the portion shown in FIG. 2;

FIG. 4 is an end view of a part of the differential mechanism; and

FIG. 5 is a sectional view on substantially lines 55 of FIG. 4.

In proceeding with this invention, I interpose a differential mechanism between the driving shaft and driven shaft which latter is used for rotating the take-up package. The differential mechanism employs a unit which is interposed between the two shafts and which itself is rotatable relative to both of said shafts. I control this unit by causing it to operate a pressure fluid system which may be throttled so as to vary the load which is applied to the unit and thus control the driven shaft with relation to the driving shaft which may be maintained at a constant speed. This throttle is then controlled from the driven shaft of the differential, which drives the take-up package, by an arrangement which is adjustable so as to reflect the size of the package as it changes in size and to control the throttle accordingly so that the driven shaft will change speed as the size of the package changes so as to maintain a constant tension on the web being wound. Conveniently I may use a lever interposed in the throttle control and apply a constant pressure on this lever at varying locations along the lever in time with the build-up of the package. This pressure on the lever may conveniently be had by a fluid system which may be adjusted to apply a desired selected pressure on the lever.

With reference to the drawings, the take-up roll is designated 10 mounted on a shaft 11. Shaft 11 is driven from the electric motor 12 with a differential mechanism 13 interposed in the line of drive. Drive shaft 14 of this differential mechanism is driven directly from the motor 12 through belts 15 at a constant speed. Driven shaft 16 of this differential mechanism drives jack shaft 17 through belt 18, and this shaft in turn drives the shaft 11 through belt 19.

This differential mechanism 13 as generally shown in FIG. 5 of my Patent 2,599,795 and modified as hereinafter explained includes a unit 86 which is relatively rotatable with reference to both of the

shafts

14 and 16, and this relatively rotatable unit has a sprocket which through chain 84 is connected to a pump 20 through a coupling 21 and shaft 22 so as to drive the pump. This pump draws oil from a reservoir 23 through conduit 24 and drives this liquid through conduit 25 and through the throttling valve 26 back to the reservoir 23 through conduit 27. A relief valve 28 may be connected across the

lines

25 and 27 so as to take care of any excess pressure developed by the pump 20. This valve 28 acts as a safety valve for protection for the mechanism. It is normally maintained closed unless the pressure is excessive. Plunger 30 of the valve 26 moves to open or close the passage 31 to it from the pump so as to throttle the liquid in the system operated by the pump 20 and thus put more load or less load upon the pump 20 and consequently on the rotatable unit of the differential 13. Movement of this plunger 30 is accomplished through a lever 32 fulcrummed as at 33 which engages the piston rod 34 at 35 spaced from the pivot 33.

A second hydraulic circuit having a pump 37 which draws liquid from the reservoir 23 through conduit 38 and discharges this liquid through conduit 39 and through conduit 40 in which there is a throttling valve 41 interposed back to the reservoir 23. This valve 41 may be throttled by means of a handle 42 so as to apply the desired amount of pressure in line 43 and flexible conduit 44 to an actuating cylinder 45. The amount of this pressure will be shown on dial 46. This pressure in the line 44 transferred to the cylinder 45 will apply substantially a constant pressure on the lever arm 32. The point of application of this pressure to the lever arm may be varied by movement of the cylinder 45 by screw means designated generally 47 so as to vary the location of application of pressure to the lever 32. This screw means will be rotated from the driven shaft 16 through some suitable belt connection 48 to an infinitely variable speed device 49 and from this device 49 through belt 59 to drive the threaded mechanism 47.

The threaded mechanism designated generally 47 and cylinder 45 are further illustrated in FIG. 2 and FIG. 3. The cylinder 45 is equipped with a bracket 50 and a second bracket 51 at spaced locations thereon, the bracket 50 having a threaded bore 52 for the accommodation therethrough of the threaded shaft 53, while the bracket 51 has a threaded bore 54 for the accommodation therethrough of the threaded shaft 55. It will be noted that one of theseshafts is above and one of these shafts is below or on opposite sides of the cylinder 45 and serve to provide a very secure and balanced mounting for the cylinder 45, especially as the brackets have a substantial length of bore through which the threaded shafts extend. These shafts are connected together by sprockets 56 on

shaft

53 and 57 on shaft 55 through a sprocket chain 58 so that they will rotate in unison and thus carry the cylinder 45 along these shafts as they rotate. The cylinder 45 is equipped with a pair of rollers 60 and 61 at one end which engage a flat surface 62 of the framework of the machine so as to be supported at this end as the cylinder moves along by means of the operation of the screw shafts. A piston is located in this cylinder 45 which is urged under the pressure in the second hydraulic system through the flexible tube 44 at a constant pressure to force the piston rod 63 outwardly of the cylinder. This piston rod carries a clevis 64 with a roller 65 which engages in a groove track 66 in the lever 32 'pivoted as at 33 in the framework of the mechanism.

There is also shown in this view the end 35 of the connecting rod 34 which operates the throttle valve 30. Thus as the lever 32 moves, this throttle valve 30 will move in accordance with the pressure applied and the location of the application of pressure by the hydraulic cylinder 45.

After a package is completed, it is desirable to return the cylinder 45 to its starting position, and this is accomplished by motor 70 (FIG. 1) connected to shaft 55 through a slipping clutch 105 by a sprocket chain 71 and sprocket gear 72 on the end of shaft 55 so that this hydraulic cylinder 45 may be returned to its starting position during the package change. Energy is supplied to motor 70 from source 75 through line 76 to normally open switch 77 and from thence through line 78 through reversing switch 79 to motor 70 and from thence through line 80 through normally closed switch 81 back to the supply through line 82. The arrangement is such that when the package is removed or when the clutch 106 is disengaged, the switch at 77 will be closed, thus completing the circuit to energize the motor 70 and drive the shafts through the sprocket chain 71 to starting position where the switch 81 will be opened by the cylinder movement and stop the cylinder 45 in its starting position.

The differential mechanism is shown in greater detail in FIGS. 4 and and is designated generally 13, and as here illustrated, there is the driving shaft 14 and the driven shaft 16 heretofore referred to and which are both rotatably mounted in unit 86 which is cross-hatched and which unit is rotatable relative to both of these shafts and carries gear 85 from which shaft 22 is driven through chain 84. Ball bearings 87 mount the shaft 14 in the unit, while ball bearings 88 mount the shaft 16 in the unit. A chain mechanism carried in the unit is utilized for connecting the

shafts

14 and 16 for rotation in opposite directions. Gear 89 on shaft 14 drives gear 90 through a suitable sprocket chain 92 to rotate a shaft 91 supported in the unit. Gear 93 on shaft 91 drives gear 94 through a suitable sprocket chain 96 to rotate shaft 95 supported. on the unit, and gear 97 on shaft 95 serves to drive gear 98 on shaft 16 in the reverse direction by sprocket chain 99 which is trained about gear 100 on shaft 101, gear 102 on shaft 104 and thence about gear 98 as shown in FIG. 4, thus applying a reverse direction to shaft 16. This chain drive provides for a much quieter drive than where bevelled gears are utilized for a differential motion.

In some cases it may be desirable to provide the main driving motor 12 as a variable speed motor and to supply a connection 103 from the control mechanism to this motor so as to vary the speed of the motor as poweris required from the motor, thus providing a means of conserving power which will be especially important where heavy loads are being handled.

In operation of this mechanism, it will be apparent that the motor 12 supplies the power for driving the take-up package 10 through the difierential mechanism 13 by applying power on the driving shaftv 14 which will, in turn, through its driven shaft 16 supply driving torque to the package. The differential unit 86 which is coupled to the first hydraulic circuit will by means of the throttle valve 26 control the desired amount of torque which is given to the driven shaft 16 from the input shaft 14, and that power which is not supplied to the driven shaft 16 will be taken up by the differential unit 86 driving the pump.

For example, if the input shaft 14 is made to turn 300 revolutions per minute and the output shaft is held stationary, the unit 86 will turn rpm. in the same direction as the input shaft 14. Some suitable gear ratio may be provided between this unit 86 and the shaft 22 which is coupled to the pump 20. If the output shaft is allowed to go free, it will turn at the same speed as the input shaft and in the opposite direction with the unit 86 held stationary. When the wound material is attached to the output shaft, it will turn at a speed at which the material will allow it to turn, the tension on the material holding the speed to the required revolutions given at any diameter. As the take-up roll increases in diameter, cylinder 45 moves to the left and moves plunger 30 upwardly toward its closed position thus increasing the pressure in line 25. The pressure at the pump increases in direct proportion to the increase in diameter of the roll if constant tension is to be maintained. This is accomplished by setting the variable speed unit 49 to a setting where the cylinder advances away from the pivot 33 at such a speed that the position of the cylinder 45 is always at the correct point on the lever arm 32. The infinitely variable speed unit 49 will be adjusted in accordance with the thickness of the web material which is being wound so that the advance of the cylinder 45 will be the required amount to vary the throttling to supply the desired tension on the web as it is wound. This increase of pressure puts more lead on the pump in direct proportion to the diameter of the batch roll and continues to whatever size the roll is wound. Thus the turning power supplied goes into the output shaft putting extra torque onto the output shaft. This increased torque keeps the constant, if desired, tension on the web as the roll gets bigger.

It will, of course, be apparent that this same control may be applied to unwinding the web as to winding the web except that the cylinder 45 will operate in the reverse direction.

I claim:

1. A mechanism for connection to a take-up roll comprising a driving shaft, a driven shaft for operating the take-up roll, a differential mechanism connecting said shafts including a unit relatively rotatable with reference to both shafts, a pressure fluid system including a pump driven from said unit and adjustable meansfor throttling the flow through said system to load the pump and load the unit to control the driven shaft, means independent of the work take-up roll and operable from said driven shaft for adjusting said throttling means.

2. A mechanism as in claim 1 wherein the said independent means includes a pressure device and adjustable means for maintaining said device at constant pressure..

3. A mechanism as in claim 1 wherein the said independent means includes a fluid pressure cylinder and a second pressure fluid system and means for maintaining a constant pressure insaid cylinder.

.4. A mechanism as in claim 1 wherein the said in- References Cited by the Examiner depenlmlient means includes a pivoted lever connected to UNITED STATES PATENTS said t rottling means and means to app y a constant pressure at varying locations along said lever. 2,563,660 8/51 Reb ut 242 75'53 5. A mechanism as in claim 1 wherein the said in- 5 2599795 6/52 Whltfl 242 75-53 X dependent means includes a pivoted lever connected to 2538285 5/53 MacQuame et 24275-53 said throttling means and means to apply a constant pres- DON A. W AITE, Primary Examiner sure to said lever at progressively different distances from the pivot of said lever. MERVIN STEIN, Examiner.

Claims

1. A MECHANISM FOR CONNECTION TO A TAKE-UP ROLL COMPRISING A DRIVING SHAFT, A DRIVEN SHAFT FOR OPERATING THE TAKE-UP ROLL, A DIFFERENTIAL MECHANISM CONNECTING SAID SHAFTS INCLUDING A UNIT RELATIVELY ROTATABLE WITH REFERENCE TO BOTH SHAFTS, A PRESSURE FLUID SYSTEM INCLUDING A PUMP DRIVEN FROM SAID UNIT AND ADJUSTABLE MEANS FOR THROTTLING THE FLOW THROUGH SAID SYSTEM TO LOAD THE PUMP AND LOAD THE UNIT TO CONTROL THE DRIVEN SHAFT, MEANS INDEPENDENT OF THE WORK TAKE-UP ROLL AND OPERABLE FROM SAID DRIVEN SHAFT FOR ADJUSTING SAID THROTTLING MEANS.