US3253316A - Warping machine with a plurality of brakes for braking a warp beam, contact roller and measuring roller - Google Patents

Warping machine with a plurality of brakes for braking a warp beam, contact roller and measuring roller Download PDF

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Publication number
US3253316A
US3253316A US344324A US34432464A US3253316A US 3253316 A US3253316 A US 3253316A US 344324 A US344324 A US 344324A US 34432464 A US34432464 A US 34432464A US 3253316 A US3253316 A US 3253316A
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United States
Prior art keywords
warp beam
roller
braking
pressure
brake
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Expired - Lifetime
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US344324A
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English (en)
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Stock Rolf
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Benninger AG
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Benninger AG
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    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/04—Control of the tension in warp or cloth
    • D03D49/06—Warp let-off mechanisms
    • D03D49/08—Warp beam brakes
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02H—WARPING, BEAMING OR LEASING
    • D02H13/00—Details of machines of the preceding groups

Definitions

  • the present invention relates to an improved apparatus for braking a warp beam, contact roller and measuring roller including means for automatically adjusting the braking force applied to the contact roller and measuring roller such that the braking distance for warp beam, contact roller and measuring roller is the same or Substantially the same, irrespective of the point of time during a yarn winding operation when the warp beam is braked.
  • the maximum permissible brake moment or couple is determined by the sliding or anti-friction characteristics of the yarn material wound upon the warp beam.
  • Previous known prior art braking apparatus which serve the purpose of providing an equal braking path for warp beam, measuring roller and contact roller exhibit the disadvantages that, on the one hand, the braking moment at the warp beam does not remain constant during the winding operation, therefore the maximum permissible braking moment cannot be completely made use of, and, on the other hand, for distributing the braking force to individual components of the full-width warping machine elements are provided which possess a considerable mass and which must be moved during a braking operation, thus delaying response of the brakes.
  • Another important object of the present invention is the provision of an improved apparatus for automatically adjusting the braking force applied to at least a first operable element in dependence upon the changing mass of a second operable element, whereby the braking path for said first and second elements remains equal or substantially equal.
  • Still a further important object of this invention is to provide improved means for automatically adjusting the braking force applied to a contact roller and measuring roller of a warping machine such that the braking distance of the warp beam upon which the warp threads are wound, the contact roller and measuring roller is the same or substantially the same, irrespective of the point of time during the winding operation when the warp beam is braked.
  • a further important object of the present invention is the provision of an improved automatic control means for maintaining equal or substantially equal the braking path of a warp beam, contact roller and measuring roller of a warping machine, such control means permitting accommodation to the characteristics of the particular yarn being wound.
  • a warping machine incorporating a number of brakes for braking a warp beam, contact roller and measuring roller, is provided with adjustment means which effect that a constant relationship of the braking forces is maintained during every magnitude of the brake force in spite of the fact that during a Warping operation the working load changes at the warp beam.
  • Characteristic of the invention is that pressure regulator means are provided and operably associated with the brakes of the contact roller and measuring roller, as well as there also being provided adjustment means controlled by the momentary diameter of the yarn package at the warp beam, wherein said adjustment means continually adjust the pressure appearing at the pressure regulator means relative to the pressure elfective at the brakes of the warp beam such that the braking path of warp beam, measuring roller and contact roller is equal or substantially equal.
  • FIGURE 1 schematically illustrates an embodiment of warping machine constructed in accordance with the teachings of the present invention.
  • FIGURE 2 is a fragmentary view showing details of a somewhat modified system with respect to that of FIG- URE l.
  • FIG- URE l the Warping machine schematically depicted in FIG- URE l, of which only enough structure has been illustrated to enable comprehension of the inventive concepts, incorporates a warp beam 1 and a measuring roller 2 cooperating with this warp beam 1 in order to measure the length of the yarn material wound onto the latter.
  • Any standard measuring roller can be employed which will serve such purpose.
  • the measuring roller 2 contacts the rim of the warp beam 1, and since there is a definite correlation between the rotation of the warp beam 1 and that of the measuring roller 2 it is easily possible to ascertain the exact amount of yarn wound onto such warp beam 1.
  • a modified construction could be employed where the measuring roller 2 is directly in contact with the Wound yarn package 1" at the warp beam 1.
  • the warp beam 1 and measuring roller 2 are rotatably mounted in suitable manner in the machine frame (not shown).
  • a contact or pressure roller 3 is pivotally mounted by means of a lever arm 4 at its sleeve or bushing 4a to rock about a pivot shaft 5 in such a manner as to evade the increasing diameter of the yarn package 1" opposite to the contact pressure.
  • the warp beam 1 as well as the measuring roller 2 and contact roller 3 are each provided with a suitable braking means 1', 2 and 3 respectively. Since the braking system or means 1, 2' and 3 is similar in construction for each of the aforementioned beam or roller components, only the brake means 1 of the warp beam 1 will be considered, with at least certain of the corresponding elements being designated with the same reference numerals for the brakemeans 2' and 3' of the measuring roller 2 and contact roller 3 respectively.
  • such brake means 1' is constructed similar to the conventional automobile brake system for example, and accordingly is comprised of brake shoes 21 provided with suitable brake linings 22, with such brake shoes being pivotably mounted at pivot shaft 23. Additionally, the brake means 1', 2 and 3' are each provided with a brake cylinder 1", 2" and 3" respectively, for actuating in known manner the associated brake shoes 21, whereby warp beam 1, measuring roller 2 and contact roller 3 can be braked.
  • each of the brake cylinders 1", 2" and 3" can be supplied, as required, with pressure medium, pressurized oil for example, delivered from a suitable storage means 7 or from another appropriate pressure oil or pressure gas source.
  • the selective feed of pressure oil from the storage means 7 to the brake cylinder 1 as well as to the brake cylinders 2" and 3", is controlled by means of a slide means or slide valve 6 possessing a response time which is as quick as possible.
  • the slide means 6 can be controlled, for example, by means of an electromagnet 6a.
  • means 6 shown in the drawing the pressurized medium is prevented from reaching the brake cylinders 1", 2 and 3", wherefore no braking force is exerted upon the warp beam 1, measuring roller 2 and control roller 3.
  • conduit 27 is provided with a flexible hose portion 28 leading to the brake cylinder 3" in order to accommodate for the aforementioned movements carried out by the control roller 3.
  • each pressure regulator 8 and 8' is provided with a central compartment 30 and 30' respectively, in which there is slidably disposed a respective oil pressure control piston 9 and 9.
  • Each control piston 9 and 9' is adapted to seat on a valve seat 31 and 31' respectively, in order to cut-off flow of pressure medium to the associated brake cylinders 1", 2" and 3" when the pressure acting upon such brake cylinder reaches a preset value, as will be explained shortly.
  • each control piston 9 and 9' includes a respective further piston 32 and 32' adapted to bear against a respective spring 10 and 10' accommodated internally of each pressure regulator 8 and 8' respectively.
  • the spring 10 of the pressure regulator 8 bears against a support plate 13a carried by threaded spindle means 13.
  • the spindle means 13 can be rotated by operating knob 13b in order to vary the stress of the spring 10, to thereby regulate the pressure appearing at the brake cylinder 1".
  • the pressure medium will flow from the pressure supply source 7 to the brake cylinder 1" via the branch line 24 and central compartment 30 and conduit 25, since the control piston 9 is held by such spring 10 away from its valve seat 31.
  • the control piston 9 is forced downwardly to seat upon the valve seat 31, whereby the flow of pressure medium to the brake cylinder 1 is cut-01f.
  • pressure regulator 3 serves to cut-olf the flow of pressure oil to the brake cylinder 1" in accordance with the stress applied to the spring 10, and as adjusted by the springstress regulating mechanism 13, 13a, 13b.
  • the regu- In the closed position of the slide lating mechanism 13, 13a, 13b is used to control and vary the cut-off pressure for the brake cylinder 1" in dependence upon the properties and characteristics of the particular yarn or thread material being wound at the relevant time upon the warp beam 1. 4
  • the pressure regulator 8' functions in corresponding manner with regard to the brake cylinders 2" and 3" of the measuring roller 2 and contact roller 3 respectively.
  • the stress applied to the spring 10 and thereby the oil pressure effective at brake cylinders 2 and 3 is automatically adjusted as a function of the movement of the contact roller 3 displaced during yarn winding by means of an automatic adjustment means operably associated with the support bolt or pin 13' for spring 10. The details of this automatic adjustment means will be considered shortly.
  • throttling locations 11 and 11 which continually permit a small quantity of oil to flow out of the brake lines or conduits 25, 27 and 28 into the oil tanks or reservoir 12. Also, a pressure loss appearing in the brake cylinders 1, 2" and 3" is automatically equalized by opening the control pistons 9 and 9' under the action of the force of the springs 10 and 10'.
  • the braking moment which is effective at the warp beam 1 can be adjusted by means of the threaded spindle 13, rotation of which enables varying the effective spring force of the spring 10.
  • the braking moment of the brake 2' of the measuring roller 2 as well as the brake 3' for the contact roller 3 is automatically adjusted in accordance with the changing mass of the warp beam 1 during yarn winding by means of the automatic adjustment means, here shown by way of example as comprising linkage system 14, 15 and 16.
  • the lever 14 can be integral with or operatively connected to the lever arm 4 to partake in pivotable movements experienced by this lever arm 4 as the size of the yarn package 1' changes during winding.
  • the lever 14 is connected with a rod 15 articulated to a further lever 16 pivotably mounted at fulcrum 16a and operably bearing against the pin or bolt 13'.
  • the automatic adjustment means incorporating lever 14, rod 15 and lever 16 can be replaced by other suitable means, as for example cams which will carry out substantially the same function to achieve the same result. It will be appreciated that as the diameter of the yarn package 1 increases the contact roller 3 is displaced to the right of the drawing, levers 4 and 14 are pivoted counterclockwise, the rod 15 being moved upwardly, thereby rocking the lever 16 so that the free end 16b moves downwardly to thereby decrease the stress of the spring 10'.
  • the sealing or control piston 9 can be closed by a correspondingly smaller oil pressure appearing in the conduit or lines 27, 28 which, in effect means that, a smaller oil pressure appears at the brake cylinder 2" and 3" so that a longer braking path is provided for the measuring roller 2 and contact roller 3.
  • this longer braking path of the measuring roller 2 and contact roller 3 has been adjusted in accordance with the increased braking path of the warp beam 1, the mass of which has increased to the extent of the wound yarn package 1, and such that the braking path of warp beam 1, measuring .roller 2 and contact roller 3 is the same or substantially the same, ir-
  • the lever system 14, 15, 16 or other equivalent transmission means of the automatic adjustment mechanism exhibits such a characteristic that it always regulates the pressure for the measuring roller brake 2" and the contact roller brake 3" such that the braking path or distance for the warp beam 1, measuring roller 2 and contact roller 3 is always the same or substantially the same.
  • the control of the pressure regulator 8' for the brake 2' and 3' of the measuring roller 2 and contact roller 3 respectively can be adjusted by regulating the point of articulation or pivot point of the rod 15 at the lever 16 by means of the spaced holes 16, 16" and 16" providing a stepwise finer adjustment.
  • the adjustment of the spindle 13 and the point of articulation of the rod 15 at holes 16', 16" and 16 etc. can also be combined with suitable means such that the same can be carried out from a single operating element.
  • suitable means such that the same can be carried out from a single operating element.
  • Such a possibility is provided with the modified arrangement of FIGURE 2 wherein the lever 16 is provided with an elongated slot 160 for slidably receiving the end 15a of the rod 15.
  • the operating knob 13b is connected to one end of a lever or connecting rod 40 operatively secured at its other end with the rod 15.
  • a warping machine comprising a warp beam, contact roller and measuring roller, brake means for braking said warp beam, contact roller and measuring roller, pressure regulator means operably connected with said brake means of said contact roller and said measuring roller, adjustment means responsive to the momentary diameter of a yarn package wound onto said warp beam for continually automatically regulating the pressure at said pressure regulating means with respect to the pressure effective upon said brake means for said warp beam such that the braking path for warp beam, measuring roller and contact roller is substantially equal, adjusting means for adjusting the braking force acting on the warp beam to a predetermined value, and pressure regulating means operatively connected with the brake means of the warp beam and acting on said adjusting means to maintain a constant braking force acting on the warp beam with increasing weight of the beam during a winding operation.
  • a warping machine including a pressure regulator for regulating braking moment effective at said warp beam in accordance with the yarn material handled by said warp beam, said automatic adjustment means for said pressure regulating means for said contact roller and said measuring roller including means accommodating said adjustment means to the regulated braking moment effective at said warp beam.
  • a warping machine wherein said pressure regulator for said warp beam is operatively connected with said automatic adjustment means such that setting of said pressure regulator automatically is effective upon said accommodating means for said adjustment means, and a single operating member for setting said pressure regulator for said warp beam.
  • a warping machine including means connecting said pressure regulator for said warp beam with said adjustment means for said pressure regulator means of said contact roller and said measuring roller, and a common operating member for controlling said pressure regulator and simultaneously effective upon said means accommodating said adjustment means to the regulated braking moment effective at the warp beam.
  • a warping machine comprising a warp beam, at least one roller member cooperating with said warp beam, brake means for selectively braking said warp beam and said roller member, pressure regulator means for controlling the pressure eifective at said brake means for said warp beam, pressure regulator means for controlling the pressure effective at said brake means for said roller member, and means responsive to changing brake path of the warp beam during operation thereof for adjusting the pressure regulator means of said roller member such that the brake path of the warp beam and roller member are substantially the same.
  • a warping machine according to claim 5 wherein said pressure regulator means for said warp beam includes a regulating mechanism for setting the cut-off pressure in accordance with material handled by said warping machine.
  • a warping machine according to claim 6 wherein said means for adjusting the pressure regulator means of said roller member comprises a linkage system.
  • said linkage system includes means for varying the operating characteristics of said linkage system in accordance with the setting of said regulating mechanism.
  • a warping machine according to claim 5 wherein said one roller member is mounted for pivotable movement and operably connected with said means for adjusting the pressure regulator means of said roller member.
  • a warping machine including a source of pressurized medium for said brake means communicating with the respective pressure regulator means for said warp beam and said one roller member.
  • a warping machine comprising a warp beam, at least one roller member cooperating with said warp beam, brake means for selectively braking said warp beam and said roller member, pressure regulator means for controlling the pressure effective at said brake means for said warp beam, pressure regulating means for controlling the pressure effective at said brake means for said roller member, and means responsive to increasing mass of the warp beam during operation thereof for adjusting the pressure regulator means of said roller member such that the braking path of the Warp beam and roller member are substantially the same.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Warping, Beaming, Or Leasing (AREA)
US344324A 1963-02-18 1964-02-12 Warping machine with a plurality of brakes for braking a warp beam, contact roller and measuring roller Expired - Lifetime US3253316A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH202463A CH400934A (de) 1963-02-18 1963-02-18 Zettelmaschine mit mehreren Bremsen zum Abbremsen von Zettelbaum, Anpresswalze und Messwalze

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US3253316A true US3253316A (en) 1966-05-31

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US344324A Expired - Lifetime US3253316A (en) 1963-02-18 1964-02-12 Warping machine with a plurality of brakes for braking a warp beam, contact roller and measuring roller

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CH (1) CH400934A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3604471A (en) * 1969-06-27 1971-09-14 North American Rockwell Letoff release mechanism

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2181049A (en) * 1939-01-19 1939-11-21 Oilgear Co Hydraulic drive
US2357821A (en) * 1940-01-20 1944-09-12 Vickers Inc Hydraulic winding machine
US2382760A (en) * 1940-01-25 1945-08-14 Wiggermann Georg Warping machine
US2677870A (en) * 1951-02-06 1954-05-11 Reiners Walter Beam warping apparatus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2181049A (en) * 1939-01-19 1939-11-21 Oilgear Co Hydraulic drive
US2357821A (en) * 1940-01-20 1944-09-12 Vickers Inc Hydraulic winding machine
US2382760A (en) * 1940-01-25 1945-08-14 Wiggermann Georg Warping machine
US2677870A (en) * 1951-02-06 1954-05-11 Reiners Walter Beam warping apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3604471A (en) * 1969-06-27 1971-09-14 North American Rockwell Letoff release mechanism

Also Published As

Publication number Publication date
CH400934A (de) 1965-10-15

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