US3921926A - Winding shaft with variable torque - Google Patents

Winding shaft with variable torque Download PDF

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Publication number
US3921926A
US3921926A US352965A US35296573A US3921926A US 3921926 A US3921926 A US 3921926A US 352965 A US352965 A US 352965A US 35296573 A US35296573 A US 35296573A US 3921926 A US3921926 A US 3921926A
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US
United States
Prior art keywords
sleeve
shaft
friction
friction disc
winding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US352965A
Other languages
English (en)
Inventor
Willi Jores
Helmut Lehmann
Franz Hoffacker
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Agfa Gevaert AG
Original Assignee
Agfa Gevaert AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Agfa Gevaert AG filed Critical Agfa Gevaert AG
Publication of USB352965I5 publication Critical patent/USB352965I5/en
Application granted granted Critical
Publication of US3921926A publication Critical patent/US3921926A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H18/00—Winding webs
    • B65H18/08—Web-winding mechanisms
    • B65H18/10—Mechanisms in which power is applied to web-roll spindle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/41—Winding, unwinding
    • B65H2301/414—Winding
    • B65H2301/4148—Winding slitting

Definitions

  • An apparatus for winding bands on to cylindrical supports comprises a rotatable shaft having a plurality of winding sleeves each being adapted to carry a support and cause it to rotate with the sleeve, each sleeve being independently rotatable 0n the shaft Associated With each sleeve is a friction drive from the shaft and means for adjusting the torque applied to the sleeve.
  • This invention relates to a winding shaft for winding bands. comprising a plurality of winding sleeves arranged along the shaft. which sleeves are individually driven by friction drives. Winding shafts of this kind are used. for example. for winding bands which have been cut on a roll cutting machine on to winding sleeves or cores. for example in commonly assigned U.S. Pat. application Ser. No. 318.2l I. filed Dec. 26. I972. The finished packages should be of uniform diameter and wound at a constant tension.
  • Winding shafts have been described for this purpose in which the torque of the shaft is increased with iricreasing diameter of the roll by electrical means (direct current motor).
  • electrical means direct current motor
  • all the bands are wound at the same speed of rotation. in other words the rolls are not driven individually by friction.
  • winding shafts which are driven at a regulated speed of rotation and in which the torque is adapted to the increasing diameter of the rolls by individual friction drives.
  • This type of winding shaft has the disadvantage that the contact pressure force of the individual friction drives is transmitted from one end of the shaft to the other through all the friction and sleeve clamping elements so that a considerably proportion of the driving force is lost in friction. Consequently, differing frictional forces are produced which adversely affect the winding characteristic.
  • winding shafts it is therefore not sufficient to drive the winding shafts at a regulated speed of rotation as is the case in known winding shafts which are driven by a direct current motor. Instead. all the rolls of the winding shaft must be provided with separate friction means. The winding shaft must therefore have a certain forward slip to compensate for the different tensions of the bands. If the final diameter of the wound roll is a multiple of its initial diameter. then the individual friction drives which are calculated according to the torque are no longer sufficient because the tension with which they wind the bands decreases with increasing diameter of the rolls so that the required winding characteristic is not fulfilled. The winding shafts previously used are therefore not suitable for winding bands with different tensions.
  • the object of this invention is the construction of a winding shaft for such bands with differing tensions.
  • the invention solves this problem by means of the fact that the flow of force of the friction drives and hence the torque which can be transmitted to the winding sleeves is adjustable from outside. To ensure a constant ten sion. therefore. the torque of the individual friction drives is continuously increased in accordance with the 2 increasing diameter of the rolls during operation of the machine.
  • the winding sleeves carry friction discs at their end faces. These friction discs are pressed against the adjacent discs of the friction heads which are fixed on the shaft. and the contact pressure is adjustable by means of a pull exerted on the friction heads in the axial direction.
  • the friction heads are connected to an axial ball bearing by rails or wires extending in grooves along the shaft.
  • This axial ball bearing is displaccable in the axial direction to adjust the required contact pressure.
  • the shaft is advantageously mounted in a fork head which is displaceable in the axial direction and which transmits the force required to adjust the contact pressure directly to the fixed part of the radial ball bearing.
  • the movement of this fork head is initiated by control elements of known construction.
  • each friction head is composed of a friction disc. :1 pressure spring and a moveable and a fixed cover plate. and the bias tension of the pressure spring is adjustable by means of setting screws so that the friction heads are elastic in the axial direction with variable bias tensions.
  • This special construction of the friction heads enables the friction pressures to be adjusted individually.
  • the friction heads also serve to compensate for stretching in the wires or rails used for transmission of the force.
  • At least two pivotal rocker arms are provided for each winding sleeve. These rocker arms have a wedge shaped surface and therefore yield resiliently when the winding sleeves are pushed over them. When the winding sleeves have passed over the rocker arms. the arms are deflected completely outwards by the spring force and form an unshiftable abutment for the winding sleeves.
  • the rocker arms can also be swung back by actuating a pushrod with coneshaped element mounted inside the winding shaft and they can be sunk into recesses in the winding shaft. The winding sleeves are then released. These abutments which can be swung in or out considerably facilitate mounting of the winding sleeves on the shaft.
  • FIG. I is a cross sectional longitudinal view of on em bodiment of this invention taken through FIG. 2A-B and in FIG. 2C-D along the lines l1
  • FIG. ZA-B is a cross sectional view taken through FIG. I along the line ZA-ZB; and
  • FIG. 2C-D is a cross sectional view taken through FIG. 1 along the line 2C-2D.
  • winding shaft according to FIG. I consists of a hollow cylinder 1 with winding sleeves 2 and friction heads 3. Inside the hollow cylinder is a pushrod 4 for actuating the rocker arms 5.
  • the rocker arms 5 serve as abutments for the winding sleeves 2 which are arranged at regular intervals along the winding shaft.
  • the winding sleeves 2 are mounted on so-called sleeve holders 2a. These sleeve holders 2a are mounted to be rotatable b, means of ball bearings 6 and carry friction discs 7 at one end.
  • the winding sleeve 2 with counterplate 8 rigidly connected to it is pressed between these friction discs 7 in cooperation with inner counterplate 80 secured to hollow shaft 1 by pin 8b.
  • the friction head is a spring element.
  • lt essentially comprises the spring 9.
  • the outer cover plate ll carries setting screws I 10 for varying the bias tension of spring 9.
  • the pressure springs 9 determine the initial torque of the sleeve holders so that small rolls can also be wound without readjustment of the torque.
  • Drawing wires 12 are arranged parallel to the axis on the cover plate 11 of the winding heads 3. They lie in grooves along the shaft and are connected to the axial ball bearing 13. Axial displacement of the axial ball bearing 13 changes the tension transmitted to the friction heads by the drawing wires and hence also the friction pressure and the torque. At least two drawing wires must be provided for symmetry.
  • the drawing wires are mounted in a displaceable fork head 14.
  • this fork head is transmitted directly to the fixed part of the axial ball bearing 13 and can be adjusted according to the increasing diameter of the rolls by means of a governor circuit.
  • the torque transmitted from the friction heads 3 to the winding sleeves therefore increases with increasing diameter of the rolls.
  • the torque transmitted is zero. Owing to the ball bearing 6, the sleeve holders are at rest while the friction heads 3 and drawing wires 12 rotate.
  • the adjustable friction heads have the further advan tage that the friction properties can be adjusted individually for each winding sleeve and that stretching of the drawing wires can be compensated.
  • the rocker arms 5 which serve as abutments for the winding sleeves are controlled by the movement of the pushrod 4.
  • the pushing movement is initiated by a compressed air driven piston (not shown) by way of an entrained coupling ring 15 and the coupling fork l6.
  • the pushrod 4 has a cone shaped element 17 in the position of each rocker arm for transmitting the movement to the rocker arm.
  • the spring 18 exerts an opposing force on the rocker arm 5.
  • the rocker arm 5 is rotatably mounted about the pivot 19 and when swung inwards it disappears into the recess 20 of the winding shaft.
  • the rocker arm 5 has a chamfered surface 21 at its outer end.
  • Apparatus for winding bands on to cylindrical tu bular supports comprising a rotatable shaft having a plurality of winding sleeves each having a cylindrical surface adapted to carry a cylindrical tubular support and cause it to rotate with the sleeve. each sleeve being independently rotatable on the shaft and. associated with each sleeve. a friction drive from the shaft and means for adjusting the torque applied to the sleeve by the friction drive.
  • each sleeve carries a first friction disc which reacts in the direction of a second friction disc.
  • the second friction disc not being capable of rotation with respect to the shaft but being moveable along the axis of the shaft so that the contact pressure between the first and second friction discs can be varied to adjust the torque applied to the sleeve. and means for moving the second friction disc along the axis of the shaft.
  • the means for moving the second friction disc comprises axial elements connecting the friction disc to a ring bearing also mounted on the shaft, the ring bearing receiving a forked control head which can be moved in an axial direction to vary the contact pressure between the friction discs.
  • each sleeve has associated therewith retaining means which allow the supports to be mounted on the sleeve by sliding them in a first direction and then retains the supports on the sleeve and prevents them from sliding off in an opposite direction and means for releasing the retaining means.
  • a yieldable catch maintains the sleeve longitudinally positioned on the shaft whereby the axial movement of the sleeve by the ring bearing moving towards it and the first friction disc causes the counterplate to compress the second friction disc against the inner counterplate attached to the shaft.

Landscapes

  • Winding Of Webs (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
US352965A 1972-04-25 1973-04-20 Winding shaft with variable torque Expired - Lifetime US3921926A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2220159A DE2220159C3 (de) 1972-04-25 1972-04-25 Wickelwelle zum Aufwickeln von Bändern

Publications (2)

Publication Number Publication Date
USB352965I5 USB352965I5 (enrdf_load_stackoverflow) 1975-01-28
US3921926A true US3921926A (en) 1975-11-25

Family

ID=5843162

Family Applications (1)

Application Number Title Priority Date Filing Date
US352965A Expired - Lifetime US3921926A (en) 1972-04-25 1973-04-20 Winding shaft with variable torque

Country Status (8)

Country Link
US (1) US3921926A (enrdf_load_stackoverflow)
JP (1) JPS4941767A (enrdf_load_stackoverflow)
BE (1) BE798256A (enrdf_load_stackoverflow)
CH (1) CH553722A (enrdf_load_stackoverflow)
DE (1) DE2220159C3 (enrdf_load_stackoverflow)
FR (1) FR2182523A5 (enrdf_load_stackoverflow)
GB (1) GB1383626A (enrdf_load_stackoverflow)
IT (1) IT980309B (enrdf_load_stackoverflow)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4140287A (en) * 1976-12-17 1979-02-20 Hutzenlaub Armin S P Simultaneously releasable shaft-mounted reels
US4447016A (en) * 1982-06-01 1984-05-08 Perfecto, Inc. Rewind apparatus for metal strips
US5137224A (en) * 1990-01-15 1992-08-11 Windmoller & Holscher Winding spindle
US5941475A (en) * 1998-01-26 1999-08-24 Gentry, Jr.; William J. Automatic winding post
US6161791A (en) * 1998-12-22 2000-12-19 Gentry, Jr.; William J. Horizontally and vertically adjustable winding post

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5297738U (enrdf_load_stackoverflow) * 1976-01-21 1977-07-22

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2431130A (en) * 1946-03-28 1947-11-18 Andrew J Luchansky Device for winding up webbing from looms
US3322361A (en) * 1965-09-03 1967-05-30 John Dusenbery Company Inc Low tension core adapter
US3622096A (en) * 1969-05-20 1971-11-23 Dusenbery Co John Ball bearing core adapter
US3669369A (en) * 1968-07-27 1972-06-13 Goebel Gmbh Maschf Winding shaft
US3702687A (en) * 1970-07-02 1972-11-14 Johnson & Johnson Winding device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1737667U (de) * 1956-08-20 1957-01-10 Kampf Maschf Erwin Vorrichtung zum aufwickeln von papierbahnen, folien und anderen materialien.
DE1201650B (de) * 1960-03-11 1965-09-23 Kampf Maschf Erwin Wickelwelle mit mehreren unabhaengig von-einander friktionierbaren Tragkoerpern fuer Wickelhuelsen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2431130A (en) * 1946-03-28 1947-11-18 Andrew J Luchansky Device for winding up webbing from looms
US3322361A (en) * 1965-09-03 1967-05-30 John Dusenbery Company Inc Low tension core adapter
US3669369A (en) * 1968-07-27 1972-06-13 Goebel Gmbh Maschf Winding shaft
US3622096A (en) * 1969-05-20 1971-11-23 Dusenbery Co John Ball bearing core adapter
US3702687A (en) * 1970-07-02 1972-11-14 Johnson & Johnson Winding device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4140287A (en) * 1976-12-17 1979-02-20 Hutzenlaub Armin S P Simultaneously releasable shaft-mounted reels
US4447016A (en) * 1982-06-01 1984-05-08 Perfecto, Inc. Rewind apparatus for metal strips
US5137224A (en) * 1990-01-15 1992-08-11 Windmoller & Holscher Winding spindle
US5941475A (en) * 1998-01-26 1999-08-24 Gentry, Jr.; William J. Automatic winding post
US6161791A (en) * 1998-12-22 2000-12-19 Gentry, Jr.; William J. Horizontally and vertically adjustable winding post

Also Published As

Publication number Publication date
BE798256A (nl) 1973-10-16
DE2220159C3 (de) 1981-07-02
FR2182523A5 (enrdf_load_stackoverflow) 1973-12-07
JPS4941767A (enrdf_load_stackoverflow) 1974-04-19
IT980309B (it) 1974-09-30
USB352965I5 (enrdf_load_stackoverflow) 1975-01-28
CH553722A (de) 1974-09-13
DE2220159B2 (de) 1980-10-23
GB1383626A (en) 1974-02-12
DE2220159A1 (de) 1973-10-31

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