EP0599926B1 - Faden-fournisseur - Google Patents

Faden-fournisseur Download PDF

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Publication number
EP0599926B1
EP0599926B1 EP92917601A EP92917601A EP0599926B1 EP 0599926 B1 EP0599926 B1 EP 0599926B1 EP 92917601 A EP92917601 A EP 92917601A EP 92917601 A EP92917601 A EP 92917601A EP 0599926 B1 EP0599926 B1 EP 0599926B1
Authority
EP
European Patent Office
Prior art keywords
storage body
yarn feeder
feeder according
oscillating
oscillating body
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
EP92917601A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0599926A1 (de
Inventor
Tore Claesson
Morgan Koskelainen
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.)
Iro AB
Original Assignee
Iro AB
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 Iro AB filed Critical Iro AB
Publication of EP0599926A1 publication Critical patent/EP0599926A1/de
Application granted granted Critical
Publication of EP0599926B1 publication Critical patent/EP0599926B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/36—Measuring and cutting the weft
    • D03D47/361—Drum-type weft feeding devices
    • D03D47/362—Drum-type weft feeding devices with yarn retaining devices, e.g. stopping pins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2601/00—Problem to be solved or advantage achieved
    • B65H2601/50—Diminishing, minimizing or reducing
    • B65H2601/52—Diminishing, minimizing or reducing entities relating to handling machine
    • B65H2601/524—Vibration

Definitions

  • the invention relates to a thread feeder of the type specified in the preamble of claim 1.
  • the storage body of a thread feeder Since the storage body of a thread feeder is fed the thread from one side, placed in turns on it and then mostly removed overhead and circumferentially on the other side, the storage body must be rotatably mounted on the drive shaft of a thread take-up device and secured in a contactless manner against rotation.
  • An eccentric weight on the storage body which acts by gravity, can serve, for example, to prevent rotation.
  • CH-A 439 161 it has become established, as is known from CH-A 439 161, to arrange holding magnets which are aligned with one another in the housing and in the storage body and which, thanks to magnetic forces, ensure that the storage body is secured against rotation.
  • the holding magnets have the disadvantage that the rotational securing force of the storage body is smallest in the centered position of the holding magnets and increases progressively with a relative rotation of the storage body.
  • resonance phenomena occur, which result in reciprocating, oscillating movements of the storage body about the axis of the shaft.
  • These oscillating movements are extremely disadvantageous in operation, especially if the amplitude on the outer circumference touched by the thread turns increases to 1.5 mm or more. There is a risk that the turns may no longer be used properly Discharge side are transported that sensors aligned to the windings do not respond properly and that the mass forces result in severe wear and damage.
  • Holding magnets should also be provided in the storage body in order to suppress the torsional vibrations due to very high magnetic forces.
  • extremely small storage bodies lead to problems in the thread run.
  • the holding magnets are also very expensive.
  • the invention has for its object to provide a thread feeder of the type mentioned, in which rotational vibratory movements of the storage body are prevented or at least reduced to a tolerable level.
  • the oscillating body Since the oscillating body is arranged to be movable relative to the storage body and is connected to it via a friction connection, it is excited by the storage body during a rotationally oscillating movement of the latter, but this movement takes place out of phase. From the phase-shifted movement of the vibrating body and the frictional connection to the storage body, there is an energy consumption between the storage body and the vibrating body, which effectively dampens the torsional vibrations of the storage body at least to a tolerable extent, ie an externally perceptible amplitude of approximately 0.5 mm or less leads.
  • the vibrating body dampens the torsional vibrations of the storage body, although like the storage body it is withdrawn from direct mechanical intervention from the outside and does not impair the application, storage and removal of the thread.
  • the vibrating body Thanks to the high specific weight of the vibrating body, it takes up little space for effective damping, which is extremely important in the tight space in a thread feeder.
  • the centered arrangement of the vibrating body avoids undesirable eccentric forces.
  • the position assurance ensures that the vibrating body cannot separate from the storage body.
  • the vibrating body takes advantage of the small and anyway available space to accommodate the holding magnet on the storage body. It is therefore not necessary to fundamentally change the construction concept of already proven thread feeders. Thread feeders that have already been in operation can also be retrofitted by inserting an appropriately adapted oscillating body. Especially for thread feeders without a wobble ring as feed element, but with other feed drives or if necessary even with thread separation, the vibrating body is a simple, inexpensive and optimal solution to the torsional vibration problem.
  • the vibrating body is seated in the space caused by the accommodation of the holding magnet, the holding magnet being positioned in a recess in the vibrating body.
  • the rotary coupling which works with a rotational play, ensures that the vibrating body does not run against the holding magnet and is not robbed of its damping function.
  • the use of the soft iron carrier, which is anyway necessary for holding the holding magnet, to secure the position of the vibrating body is favorable.
  • the rotary coupling forms an elastic anti-rotation device for the vibrating body, on the one hand to suppress sudden contact between the storage body and the vibrating body and on the other hand to ensure the rotational play of the vibrating body necessary for torsional vibration damping.
  • the engagement part which can be designed as a spiral spring, serves, so to speak, as an emergency stop in the event that the vibrating body could move too far from its position desired for vibration damping.
  • the rotary coupling has no direct function for vibration damping.
  • the energy consumption in the vibration damping is achieved by mechanical sliding friction.
  • rolling friction or other types of friction for energy consumption in these areas.
  • the friction occurring during vibration damping is causally responsible for the vibration damping, a desired and / or constant friction can be ensured from the start. If necessary, the friction ratios can also be changed later, in order to adjust the damping effect to the speed range of the thread feeder, where the torsional vibrations are strongest.
  • a particularly effective torsional vibration damping of the storage body results according to claim 9.
  • the damping effect achieved is also due to design features, the radius of inertia of the vibrating body, the weight distribution within the storage body and / or in the vibrating body, and the like. It may also be expedient to choose the mass of the vibrating body smaller or larger than the mass of the storage body or to divide the vibrating body into several individual masses.
  • the oscillating body does not necessarily have to be arranged on one or the other axial side of the storage body, but it can also be positioned in the interior of the storage body.
  • Mixed forms are also conceivable, in which individual vibrating body parts are arranged distributed in the circumferential direction and also in the axial direction.
  • the adhesive layer ensures the positioning and centering of the vibrating body on the storage body. At the same time, due to the internal friction, it absorbs energy when damping vibrations.
  • the adhesive layer is expediently one that is as inelastic as possible in order to eliminate a spring effect as much as possible.
  • the vibrating body is formed here from a filling of heavy grains or spheres or objects of another shape, which can absorb energy by friction when moving relative to the storage body.
  • the vibrating body could also be formed from several weight inserts in cavities of the storage body or a separate carrier body for these weight inserts. These weight inserts can move freely in the cavities be accommodated.
  • the pendulum-shaped vibrating body consumes energy in its vibrating bearing and possibly in frictional contact with the storage body.
  • a displaceable or elastically deformable material can be provided according to claim 16, which opposes the relative movement of the oscillating body with an energy-consuming resistance.
  • the damping can be further improved by the throttle passage, in addition energy is consumed as it passes.
  • a thread feeder F according to FIGS. 1 to 3, in particular a weft measuring feeder for a jet weaving machine for delivering weft thread sections of precisely dimensioned length, has a housing G which contains a drive motor (not shown) and in which a drive shaft 1 is rotatably mounted and can be driven to rotate.
  • a storage body B is rotatably mounted with bearings 7, which has a base body 2 and defines a drum-shaped storage surface 3 for thread windings W.
  • the shown embodiment of the thread feeder F works with thread separation, i.e. the windings W deposited on the storage surface 3 are pushed forward from left to right in FIG. 1 and are spaced apart from one another in the process.
  • only schematically indicated installation inserts 4, 5 are provided in the storage body B, e.g. Oblique and / or eccentric hubs, which are driven, for example, by the drive shaft 1 and set intermediate distances between the windings W indicated by 6.
  • At least one stop device S is connected to the housing G, which is cyclically withdrawn from an actuator M, for example a magnet Contains position in a stop position to the storage area 3 movable stop element P.
  • an actuator M for example a magnet Contains position in a stop position to the storage area 3 movable stop element P.
  • the storage body B rotatably mounted on the drive shaft 1 must be supported against rotation with the drive shaft 1.
  • aligned holding magnets 8, 9 are provided in the housing G and on the base body 2 of the storage body B.
  • the holding magnets 8 are expediently arranged in a row over the entire circumference.
  • only two diametrically opposed holding magnets 9 or two pairs of such holding magnets are required on the base body 2 of the storage body B.
  • the holding magnets 9 are fastened to the base body 2 with soft iron carriers 10 and holding screws 11.
  • the storage body B is e.g. made of plastic.
  • a thread winding element 12 is connected in a rotationally fixed manner, which is incorporated into a funnel-shaped support part 14 and extends outwards between the holding magnets 8 and 9.
  • a thread guide channel 13 leads through the drive shaft 1 and the winding member 12 to the outside.
  • a thread Y which in Fig. 1 comes from the left of a supply spool into the guide channel 13, is deposited by the winding member 12 in successive turns W on the storage surface 3 and then overhead of the storage body B with a circumferential thread withdrawal point from a consumer, not shown , for example a jet weaving machine, if the stop element P is withdrawn. If the stop element P is extended (FIG. 1), then the thread take-off is blocked.
  • a vibrating body K is seated, which has the shape of a plate-like circular disk and has two diametrically opposite recesses 18 in the regions of the holding magnets 9.
  • the vibrating body K is made of heavy material, preferably metal. It is expediently designed as a zinc die-cast molded part or as a steel turned part and adapted to the contour of the string side of the base body 2, designated 16, so that it faces the end face 17 of the winding member 12 without contact.
  • the vibrating body K is arranged so as to be movable relative to the storage body B and is secured in position thereon. It is in a friction connection R with the storage body B, the embodiment shown indicating two friction connections R.
  • the vibrating body K has several friction connections with the storage body B.
  • a securing part 10a is formed on the soft iron carrier 10 and engages over the edge of the recess 18 of the oscillating body K.
  • a friction connection R is provided there, for example.
  • the base body 2 has a bearing seat 21 with which it is fixed on the bearing 7. Adjacent to the bearing holder 21, a circumferential groove 19 is formed in the base body 2, in which the oscillating body K engages with an annular flange 20 which is centered and guided on the bearing holder 21 in a sliding fit.
  • a friction connection R is provided between the ring flange 20 and the bearing receptacle 21. If necessary, there is a friction lining or a in this friction connection R.
  • adjustable friction element E arranged.
  • the vibrating body K is limitedly secured against rotation on the base body 2 by a rotary coupling C which can be seen in FIG. 2.
  • the rotary coupling C is formed by a recess 22 in the oscillating body K and a projection-like engagement part 23 which is formed on the end face 16 of the base body 2 and engages in the recess 22.
  • the engagement part 23 is expediently designed in the manner of a spiral spring which is bendable in the circumferential direction and has a widened head 24 which is opposite the edges of the recess 22 with a rotational play 25 in each case.
  • the rotary coupling C is not required for the torsional vibration damping, but serves to avoid excessive twisting between the vibrating body K and the base body 2, in which the holding magnet 9 or the soft iron carrier 10 could possibly come into undesired contact with the edges of the recesses 18.
  • the vibrating body K represents a damping mass m for the storage body B.
  • the damping mass m expediently corresponds approximately to the mass of the entire storage body B.
  • the drive shaft 1 In operation of the thread feeder F, the drive shaft 1 is driven within a relatively wide speed range, so that the winding member 12 rotates and the thread turns W are deposited on the storage surface 3.
  • the holding magnets 8, 9 secure the rotational position of the storage body B in relation to the housing G. If the storage body B is excited to torsional vibrations during the rotational movement of the drive shaft 1, then the torsional vibrations are caused by the Friction connections R also transferred to the vibrating body K. This takes up phase-shifting torsional vibrations. An energy dissipation takes place via the friction connections, which results in a damping of the torsional vibrations of the storage body B.
  • the principle of effectively damping the torsional vibrations by means of at least one vibrating body K that is structurally integrated in the storage body B can be used for any type of storage body, ie also for storage bodies without thread separation or with a variable diameter or with another feed mechanism for the thread turns. Furthermore, the oscillating body can also be arranged inside the storage body B or on the end face facing away from the winding member 12.
  • the vibrating body K is connected in the intermediate space 15 to the base body 2 of the storage body B by means of an adhesive layer 26.
  • the adhesive layer 26 consists of a material with high internal friction and the least possible spring effect.
  • the vibrating body is vulcanized or glued to the base body 2 with a rubber or elastomer adhesive layer, the adhesive layer 26 possibly extending only over a partial area of the possible radial extent of the contact area between the base body 2 and the vibrating body K.
  • Fig. 5 illustrates a substantially circular vibrating body which can be attached at any point in the storage body B, e.g. 6, in a central region within a recess 27 of the storage body B.
  • FIG. 7 illustrates an end view of the oscillating body K according to FIGS. 1 and 4 with the two diametrically opposite recesses 18 for the holding magnets of the storage body.
  • FIG. 8 illustrates a design variant of a vibrating body K with a widened lower part 28 and a radially narrow upper part 29, which delimits a recess 18 for the holding magnets which is approximately half the circumference.
  • At least one oscillating body K designed as a pendulum is arranged on the storage body B so as to be rotatable about a rotary bearing 30. Stops 31 limit the Pendulum deflection of the vibrating body K around the pivot bearing 30. Either the friction in the pivot bearing 30 is used for damping or further friction connections (not shown) with the storage body B are provided.
  • the oscillating body K consists of a plurality of balls or grains or pellets 33 made of heavy material, which are arranged in a cavity 32 of the storage body B. If necessary, the cavity 32 is additionally filled with a liquid, a paste or another material with high internal friction.
  • a pocket-shaped cavity 34 of the storage body B is arranged in a freely movable manner as an oscillating body K which is designed as a curved piece 39 and which is coupled to the storage body B via friction connections.
  • a plurality of such vibrating bodies K can optionally be distributed over the circumference and also in the axial direction of the storage body B.
  • the vibrating body K is arranged in a container 35 in its cavity 37 and is designed as a ball 39 with a high mass.
  • the cavity 37 is filled, for example, with a liquid, a paste or another deformable medium, also a powder or a granulate.
  • the container 35 can be attached with brackets 36 at a suitable location on the storage body, expediently such that when the storage body begins to vibrate, the vibrating body K is displaced in the longitudinal direction in the cavity 37, possibly on the walls of the Container 35 rubs and / or displaces the filling 38 and thus consumes energy.
  • Throttle passages are provided between the outer circumference of the vibrating body K and the wall of the container 35, through which the filling 38 must pass when the vibrating body K is moving, which leads to additional energy consumption.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Forwarding And Storing Of Filamentary Material (AREA)
  • Vibration Prevention Devices (AREA)
  • Jigging Conveyors (AREA)
  • Looms (AREA)
EP92917601A 1991-08-22 1992-08-21 Faden-fournisseur Expired - Lifetime EP0599926B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4127796A DE4127796A1 (de) 1991-08-22 1991-08-22 Faden-fournisseur
DE4127796 1991-08-22
PCT/EP1992/001926 WO1993003991A1 (de) 1991-08-22 1992-08-21 Faden-fournisseur

Publications (2)

Publication Number Publication Date
EP0599926A1 EP0599926A1 (de) 1994-06-08
EP0599926B1 true EP0599926B1 (de) 1995-12-20

Family

ID=6438845

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92917601A Expired - Lifetime EP0599926B1 (de) 1991-08-22 1992-08-21 Faden-fournisseur

Country Status (7)

Country Link
US (1) US5560556A (cs)
EP (1) EP0599926B1 (cs)
JP (1) JP3341081B2 (cs)
KR (1) KR100246982B1 (cs)
CZ (1) CZ280858B6 (cs)
DE (2) DE4127796A1 (cs)
WO (1) WO1993003991A1 (cs)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19533312A1 (de) * 1995-09-08 1997-05-07 Iro Ab Fadenliefergerät
DE10014623A1 (de) * 2000-03-24 2001-09-27 Iro Patent Ag Baar Verfahren zum Steuern eines Webmaschinen-Fadenliefergeräts
JP5915219B2 (ja) 2012-02-07 2016-05-11 村田機械株式会社 糸巻取装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH439161A (de) * 1965-06-25 1967-06-30 Sulzer Ag Webmaschine mit Schussfadenzwischenspeicher
FR2428641A1 (fr) * 1978-06-12 1980-01-11 Labaz Nouveaux derives d'acides pyrrole-1 et pyrrolidine-1 carboxyliques ainsi que leur procede de preparation
CH669804A5 (cs) * 1986-05-15 1989-04-14 Sulzer Ag
EP0330951B1 (en) * 1988-03-02 1992-01-29 L.G.L. ELECTRONICS S.p.A. Weft feeding device, particularly for looms
DE3938646A1 (de) * 1989-11-03 1991-05-08 Iro Ab Verfahren zum verhindern von drehschwingungen in einer fadenspeicher- und -liefervorrichtung und fadenspeicher- und -liefervorrichtung
JP2880289B2 (ja) * 1989-11-03 1999-04-05 イーロー アーベー 糸貯留供給装置で生じる回転振動を防止する方法と糸貯留供給装置
DE9111875U1 (de) * 1991-09-23 1993-01-28 Sobrevin Société de brevets industriels-Etablissement, Vaduz Fadenspeicher und Liefervorrichtung mit verstellbarer Borstenausrichtung

Also Published As

Publication number Publication date
EP0599926A1 (de) 1994-06-08
JP3341081B2 (ja) 2002-11-05
DE59204780D1 (de) 1996-02-01
WO1993003991A1 (de) 1993-03-04
US5560556A (en) 1996-10-01
JPH07500801A (ja) 1995-01-26
CZ280858B6 (cs) 1996-04-17
KR100246982B1 (ko) 2000-04-01
DE4127796A1 (de) 1993-02-25
CZ40694A3 (en) 1994-06-15

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