EP0768410A2 - Schussfadenschmiervorrichtung für Textilmaschinen, insbesondere Webmaschinen und Dergleichen - Google Patents

Schussfadenschmiervorrichtung für Textilmaschinen, insbesondere Webmaschinen und Dergleichen Download PDF

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Publication number
EP0768410A2
EP0768410A2 EP96116160A EP96116160A EP0768410A2 EP 0768410 A2 EP0768410 A2 EP 0768410A2 EP 96116160 A EP96116160 A EP 96116160A EP 96116160 A EP96116160 A EP 96116160A EP 0768410 A2 EP0768410 A2 EP 0768410A2
Authority
EP
European Patent Office
Prior art keywords
oil
lubricators
reservoir
recovery
duct
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.)
Granted
Application number
EP96116160A
Other languages
English (en)
French (fr)
Other versions
EP0768410B1 (de
EP0768410A3 (de
Inventor
Pietro Zenoni
Giovanni Pedrini
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.)
LGL Electronics SpA
Original Assignee
LGL Electronics SpA
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
Priority claimed from ITTO950823 external-priority patent/IT1280966B1/it
Priority claimed from ITTO960370 external-priority patent/IT1285087B1/it
Application filed by LGL Electronics SpA filed Critical LGL Electronics SpA
Publication of EP0768410A2 publication Critical patent/EP0768410A2/de
Publication of EP0768410A3 publication Critical patent/EP0768410A3/de
Application granted granted Critical
Publication of EP0768410B1 publication Critical patent/EP0768410B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03J—AUXILIARY WEAVING APPARATUS; WEAVERS' TOOLS; SHUTTLES
    • D03J1/00—Auxiliary apparatus combined with or associated with looms
    • D03J1/04—Auxiliary apparatus combined with or associated with looms for treating weft

Definitions

  • the present invention relates to a device for lubricating the weft thread that is fed to textile machines and particularly to weaving looms, knitting machines, and the like.
  • the weft thread is unwound, from respective spools supported by a creel, by pre-feeders interposed between each spool and the loom and accumulate a reserve of weft in the form of turns of thread that subsequently unwind from the feeder when requested by said loom.
  • the weft thread is lubricated with low-viscosity vegetable-based oils or mixtures of oils when it is taken from the spool to be woven immediately, and the treatment must be performed in such a manner as to ensure uniform lubrication despite the unwinding speed of the thread, avoiding both excessive and insufficient impregnation.
  • the thread is currently lubricated by individual lubricating devices, which are interposed between each spool and the respective weft pre-feeder; said devices comprise an oil reservoir, in which a strip of felt or the like dips and becomes impregnated with said oil by capillary action.
  • the thread is made to slide in contact with said felt strip, from which it receives the lubricating oil. More particularly, in some conventional devices the felt strip is provided with a hole through which the weft thread passes.
  • Said weft thread by arriving directly from the spool, is subjected, in the space lying in front of said hole, to an unwinding rotation that makes said thread trace a solid of revolution known as a "balloon" and thus termed hereinafter; by virtue of this balloon, the thread repeatedly touches the internal surface of the hole, absorbing oil from the felt.
  • a principal aim of the present invention is to eliminate these and other drawbacks of conventional lubrication devices, and said invention achieves this aim with a device having the specific characteristics described in the appended claims.
  • the invention is based on the inventive concept of adopting a single oil supply reservoir having a high capacity, typically between 10 and 100 liters, and of distributing the oil by means of respective delivery ducts to a plurality of individual lubricators arranged in front of corresponding spools, each lubricator being provided with a felt that is impregnated by the stream of oil that affects it; the felt of each lubricator being provided with a respective central hole, through which the weft thread passes, said thread rotating inside said hole as a consequence of the balloon formed by its unwinding from the corresponding spool.
  • each lubricator is fed by gravity and is provided with a dosage device that allows to make the desired amount of oil reach the felt.
  • the excess oil that is not absorbed by the weft thread is collected by gravity in a discharge duct that ends in a corresponding collecting reservoir, from which it is periodically recycled into the supply reservoir by a pumping means.
  • Level sensing means are provided both on the supply reservoir and on the collecting reservoir; the first means are provided to offer at least a refill signal and the second means are provided to start or stop the recycling pumping means when the oil in the collecting reservoir reaches a preset maximum or, respectively, minimum level.
  • a pressurized supply circuit which includes at least one electric pump capable of feeding pressurized oil to a delivery duct from which branches for feeding the oil to corresponding lubricators extend, and a recovery circuit provided with a corresponding unpressurized recovery duct, in which branches connected to said lubricators merge, said branches collecting the excess oil discharged by said lubricators and conveying it to a centralized collecting reservoir, from which the suction duct of said electric pump draws.
  • An automatic dosage device is installed at the inlet of each lubricator and includes a stem-like shutter contrasted by a spring the rigidity whereof is calculated as a function of the operating pressure of the pressurized supply circuit.
  • the reference numeral 10 generally designates the structure of a creel that supports a plurality of spools 11a-11b...11n of weft thread FT that is unwound from the corresponding spool by means of a respective weft feeder, not shown, that feeds the loom or other textile machine.
  • the thread lubrication device is associated with the creel 10.
  • the device 12 comprises, substantially and in combination, an oil supply reservoir 13 arranged at the upper part of the structure of the creel 10, at a level that is in any case higher than the level of the uppermost horizontal row of spools 11b, and a plurality of lubricators 14a-14b...14n, each arranged adjacent to a corresponding spool 11a-11b...11n and in front of it (relative to the unwinding direction of the thread FT, indicated by the arrows in the figure).
  • the reservoir 13 has a substantial capacity, at least between 10 and 25 liters, and a distributor 15 is associated therewith and receives the oil from said reservoir by gravity, with the interposition of an electric valve 16 that is optionally adapted to interrupt its gravity flow.
  • a plurality of delivery ducts 17a-17b...17n branches out from the distributor 15, and each duct feeds oil, by gravity, to a corresponding lubricator 14a-14b...14n.
  • the ducts 17 are preferably connected to the distributor 15 by virtue of the interposition of respective manually-adjusted dosage devices 18a-18b...18n (only two of which, 18a, 18b, are shown) that will be described hereinafter.
  • Each lubricator 14 is configured as shown in the detail view of figure 2 and comprises a body 19 made of rigid material, preferably metal or metal alloy, that is provided with a front funnel-shaped hole 20 in which the thread FT also passes.
  • the largest cross-section of the hole 20 is directed towards the spool 11 of thread, which is arranged to the rear, and the smallest cross-section is arranged adjacent to an annular seat 21 that contains a corresponding annular felt 22 provided with a central hole 23 in which the thread FT also passes.
  • the oil supply duct 17 ends in the upper part of the seat 21, with the interposition of a corresponding dosage device, also designated by the reference numeral 18; said oil, appropriately metered according to the operating requirements, impregnates the annular felt 22.
  • the dosage devices 18 are preferably of the needle type, and each one comprises a perforated and threaded tang 180 that screws into a corresponding threaded seat 190 of the body 19 (or of the distributor 15) and ends with a conical needle 181 that cooperates with a corresponding frustum-shaped tip cavity 191 of the seat 190; the axial movement of the threaded tang 180, which is produced by rotating said tang by means of a grip ring 182, is adapted to vary the gap L that lies between the needle 181 and the conical cavity 191 in order to throttle or, if necessary, interrupt the oil flow.
  • a ring-shaped lock nut 183 screwed on the threaded tang 180 allows to lock the needle 181 in the selected adjustment position.
  • the weft thread FT in arriving from the spool 11, forms the balloon B, by means of which it rotates inside the holes 20 and 23, touching the internal surface of the latter hole and becoming impregnated with lubricating oil to an extent that is proportional to the degree of impregnation of the felt 22; said impregnation is in turn controlled by the dosage device 18.
  • the excess oil, not absorbed by the weft thread FT, is collected by gravity by a corresponding discharge duct 24 that enters the lower part of the seat 21 and leads into a common collecting reservoir 25, in which all the discharge ducts 24a-24b...24n originating from the various lubricators 14a-14b...14n end.
  • a pump 26 and a duct 26a are provided in order to recycle the oil from the collecting reservoir 25 to the supply reservoir 13, and level sensing means 27-28 are associated with the collecting reservoir 25 in order to activate and deactivate the pump 26 when the level in said reservoir reaches a preset maximum or, respectively, minimum level.
  • Similar sensor means at least of the minimum level sensing type, designated by the reference numeral 29, are provided in the supply reservoir 13 to activate at least one refill indicator 30, for example of the visual and/or acoustic type.
  • each lubricator 14 is completed, on the side where the weft thread FT enters, by a front shield 31 adapted to prevent the thread from becoming entangled in protrusions and the like due to the balloon B, and on the exit side, by a conventional brake 32 with facing disks which is adapted to tension the thread adequately.
  • said lubricators can be cascade-connected to each other, so that the excess oil released by the lubricators 14b arranged at a higher level is fed by gravity to the lubricators 14b arranged at a lower level and is finally conveyed into the collecting reservoir 25.
  • the reference numeral 100 generally designates the modular element of a creel structure SC formed by two side-by-side rear posts 101 and two side-by-side front posts 102, all of which are interconnected by cross-members 103.
  • a creel structure SC can be formed either by vertically overlapping a plurality of modular elements, such as 100'...100'' etcetera, connected by joints 104, or by arranging horizontally and side-by-side identical modular elements that are interconnected by the cross-members 103 that cooperate with the joints 104.
  • the rear posts 101 of each modular element support respective spools of thread 110-110' and the front posts 102 support a front shield 113, typically made of polymeric material, and preferably two lubricators 114-114' that are arranged side by side and downstream of the shield 113 with respect to the advancement direction of the thread FT that unwinds from the spools.
  • a centralized oil reservoir 130 of substantial capacity for example one hundred liters, is arranged adjacent to, and at the base of, a creel structure SC that is formed by a plurality of stacked and/or side-by-side modular elements 100, or said centralized reservoir is associated with a set of "n" creel structures, designated by the reference sign SC1...Scn in figure 7, that are adjacent to or even spaced from one another.
  • a pressurized circuit is associated with the reservoir 130 and is adapted to supply a preset and constant flow-rate of oil to the individual lubricators 114-114' of each modular element 100 that composes each creel structure.
  • the lubricators 114 can thus be arranged even at very different levels without this causing a difference in the flow-rate supplied thereto . Said flow-rate in fact no longer depends, as in the case of figure 1, on the hydraulic head, i.e., on the difference in level between the free surface of the oil in the reservoir 13 and each lubricator 14.
  • Said pressurized circuit comprises at least one electric pump 140 that draws oil from the reservoir 130 and at least one delivery duct 141, from which branches 143-143' extend by means of cross-shaped unions 142, to feed the lubricators 114-114' of each modular element (figure 5), said branches being preferably made of polymeric material.
  • the delivery duct 140 reaches all the modular elements 100-100'-100'' etcetera that compose each creel structure SC; the oil is also fed, by means of optional secondary ducts 141', to the various creel structures that compose a set of structures SC1...SCn as shown in figure 7.
  • the oil supply pressure in the pressurized circuit is between 5 and 25 bar, according to the number of modular elements composing each creel structure and to the number of said structures combined so as to form a system.
  • a recovery circuit cooperates with the above-described pressurized circuit and is provided with a corresponding unpressurized recovery duct 150, into which branches 151-151' merge which are also made of polymeric material, are connected to the corresponding lubricators 114-114', and are adapted to collect the excess oil discharged by said lubricators, and convey it into the duct 150 and into the centralized reservoir 130 by means of said duct.
  • the recovery duct 150 reaches, by means of corresponding cross-shaped unions 152, all the modular elements 100 that compose the creel structure and, by means of secondary ducts 150', any other creel structures that compose the set SC1...SCn (figure 7).
  • each lubricator 114 is provided with a central body, generally designated by the reference numeral 219, that is formed by a first annular portion 220 of metal or metallic alloy that is chromium-plated and is provided with a funnel-shaped central hole 221 through which the thread FT passes; due to the balloon B, said thread rotates inside the hole and remains tangent to its surface.
  • the first portion 220 is hermetically coupled, with the interposition of an O-ring 222, to a second portion 223 of the body 219 that is preferably made of polymeric material and in which a central hole 224 is formed; said hole is surrounded by an annular seat 225 for containing and retaining a felt ring 226.
  • Two diametrically opposite radial ducts 227-228 lead into the seat 225 and end with respective seats for hermetically receiving, respectively, an automatic dosage device 229 that receives the corresponding branch 143 of the delivery duct 140, and a union 230 for connecting the corresponding branch 151 of the recovery duct 150.
  • the automatic dosage device 229 in turn comprises a cylindrical body with a first threaded tang that screws into the respective seat of the portion 223 of the body of the lubricator and a second threaded tang that receives a ring 231 for the hermetic connection of the branch 143.
  • Said hermetic connection is provided, in a per se known manner, with the interposition of a connecting ring 232 that is shaped like a double frustum and cooperates with a spacer ring 233 that has a frustum-shaped seat adapted to hermetically accommodate one end of the connecting ring 232.
  • a cylindrical seat is formed in the body of the dosage device 229, and the stem of a shutter 237 is slideable in said seat with a considerable radial clearance and in contrast with the action of a spring 235 that pushes against a spacer 236; the shutter is provided with a frustum-shaped head 238 that cooperates with a valve seat that is also correspondingly frustum-shaped and is provided in said dosage device body.
  • the radial clearance between the stem of the shutter and the respective containment seat, as well as the rigidity of the spring 235, are chosen so as to allow the passage of a preset flow-rate of oil to appropriately impregnate the felt ring 226; said flow-rate is, for example, between three and eighty drops per minute. Any excess oil that is not absorbed by the thread is released by the felt 226 into the radial duct 228 to be collected by the branch 150 and conveyed into the reservoir 130.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Auxiliary Weaving Apparatuses, Weavers' Tools, And Shuttles (AREA)
EP19960116160 1995-10-13 1996-10-09 Schussfadenschmiervorrichtung für Textilmaschinen, insbesondere Webmaschinen und Dergleichen Expired - Lifetime EP0768410B1 (de)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
ITTO950823 IT1280966B1 (it) 1995-10-13 1995-10-13 Dispositivo di lubrificazione del filato di trama per macchine tessili particolarmente telai di tessitura e simili.
ITTO950823 1995-10-13
ITTO960370 IT1285087B1 (it) 1996-05-07 1996-05-07 Perfezionamento ai dispositivi di lubrificazione del filato di trama per macchine tessili, particolarmente telai di tessitura e simili.
ITTO960370 1996-05-07

Publications (3)

Publication Number Publication Date
EP0768410A2 true EP0768410A2 (de) 1997-04-16
EP0768410A3 EP0768410A3 (de) 1998-04-08
EP0768410B1 EP0768410B1 (de) 2001-05-09

Family

ID=26332300

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19960116160 Expired - Lifetime EP0768410B1 (de) 1995-10-13 1996-10-09 Schussfadenschmiervorrichtung für Textilmaschinen, insbesondere Webmaschinen und Dergleichen

Country Status (2)

Country Link
EP (1) EP0768410B1 (de)
DE (1) DE69612718T2 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105734792A (zh) * 2016-05-04 2016-07-06 苏州普邦纺织科技有限公司 一种纺织用纬线上油装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR785988A (fr) * 1935-02-06 1935-08-23 Naamlooze Vennootschap Drya Dispositif mouilleur de fil pour machines à retordre
EP0445541A2 (de) * 1990-03-08 1991-09-11 Zinser Textilmaschinen GmbH Verfahren und Vorrichtung zum Zuführen von flüssigem Präparationsmittel zu laufenden Fäden an Arbeitsstellen einer Spinnereimaschine
DE4311619A1 (de) * 1993-04-08 1994-10-13 Sobrevin Vorrichtung zum Auftragen einer Flüssigkeit auf einen laufenden Faden
EP0715014A2 (de) * 1994-12-02 1996-06-05 L.G.L. ELECTRONICS S.p.A. Schussfadenschmiervorrichtung für Webmaschinen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR785988A (fr) * 1935-02-06 1935-08-23 Naamlooze Vennootschap Drya Dispositif mouilleur de fil pour machines à retordre
EP0445541A2 (de) * 1990-03-08 1991-09-11 Zinser Textilmaschinen GmbH Verfahren und Vorrichtung zum Zuführen von flüssigem Präparationsmittel zu laufenden Fäden an Arbeitsstellen einer Spinnereimaschine
DE4311619A1 (de) * 1993-04-08 1994-10-13 Sobrevin Vorrichtung zum Auftragen einer Flüssigkeit auf einen laufenden Faden
EP0715014A2 (de) * 1994-12-02 1996-06-05 L.G.L. ELECTRONICS S.p.A. Schussfadenschmiervorrichtung für Webmaschinen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105734792A (zh) * 2016-05-04 2016-07-06 苏州普邦纺织科技有限公司 一种纺织用纬线上油装置

Also Published As

Publication number Publication date
DE69612718D1 (de) 2001-06-13
EP0768410B1 (de) 2001-05-09
EP0768410A3 (de) 1998-04-08
DE69612718T2 (de) 2001-10-31

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