EP0741808A1 - Frein de fil, systeme d'alimentation en fil et metier a tisser a navettes a pince ou a projectile - Google Patents

Frein de fil, systeme d'alimentation en fil et metier a tisser a navettes a pince ou a projectile

Info

Publication number
EP0741808A1
EP0741808A1 EP95907619A EP95907619A EP0741808A1 EP 0741808 A1 EP0741808 A1 EP 0741808A1 EP 95907619 A EP95907619 A EP 95907619A EP 95907619 A EP95907619 A EP 95907619A EP 0741808 A1 EP0741808 A1 EP 0741808A1
Authority
EP
European Patent Office
Prior art keywords
thread
brake
delivery device
support ring
holding member
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
EP95907619A
Other languages
German (de)
English (en)
Other versions
EP0741808B1 (fr
Inventor
Lars Helge Gottfrid Tholander
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 EP0741808A1 publication Critical patent/EP0741808A1/fr
Application granted granted Critical
Publication of EP0741808B1 publication Critical patent/EP0741808B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
    • D03D47/24—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick by gripper or dummy shuttle
    • 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
    • D03D47/364—Yarn braking means acting on the drum
    • D03D47/366—Conical
    • 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
    • D03D47/364—Yarn braking means acting on the drum
    • D03D47/365—Brushes

Definitions

  • the invention relates to a controllable outlet brake according to the preamble of claim 1, a thread delivery device according to the preamble of independent claim 2, a projectile weaving machine according to the preamble of claim 18 and a rapier weaving machine according to the preamble of claim 19.
  • a controlled thread brake device (run-out brake) on the storage drum is known for projectile or rapier weaving machines in order to limit the balloon on entry and to enable thread control.
  • the controlled thread braking device on the storage drum at the beginning of the entry should put as little strain on the thread as possible, especially with regard to the feared stretching stroke and in the case of sensitive thread qualities, possibly with low quality, and only increase the thread tension during the entry.
  • Such requirements have been unsatisfactory for more than 20 years known thread brake devices on the storage drum at the thread speeds common in modern weaving machines of this type.
  • a plurality of outwardly standing guide members are provided on the support ring, which engage in oblique slots of the crescent-shaped holding member.
  • the adjustment device has a cam drive for rotating the support ring back and forth about the drum axis and relative to the holding member. During this rotary movement, depending on the direction of rotation, the support ring is turned forwards or backwards via the oblique slots in order to change the braking effect during operation. Relatively large, quickly too moving masses, energy-consuming movement deflections and unstable end positions of the support ring are some reasons why this well-known principle is not used in modern weaving machines.
  • a rigid ball limiter cone in the stationary holding member can be moved axially back and forth between a light braking position and an open gap position.
  • An annular armature of a magnetic drive is attached to the cone in order to pull the cone against the force of a return spring from the gap position when the coil is energized into the braking position.
  • Large moving masses, a relatively rough braking action and a sluggish response are some reasons why this thread braking device is not suitable for the high thread speeds of modern weaving machines of this type.
  • the invention is based on the object of structurally designing a controllable outlet brake, a thread delivery device and a projecting or rapier weaving machine in such a way that an exact weft thread control is provided even at high thread speeds, or to ensure that the weft thread is the controllable outlet brake equipped thread delivery device enables the use of the high thread speeds possible in modern weaving machines of these types even with sensitive thread qualities.
  • the supporting ring is expediently displaced linearly and parallel to the axis of the storage drum by a sliding drive in each case, in order to quickly and exactly get into the new position in which brakes the thread braking element with the previously set basic thread tension or causes one or almost no braking effect.
  • the central section of the thread brake element is axially deformed by means of the sliding drives. This is favorable from an assembly point of view because the thread braking element can be easily replaced in the usual way.
  • the exact positioning of the thread braking element cooperating with the braking surface is carried out by means of the ring element, which works quickly thanks to the pneumatic actuation and, in the release position, allows the thread to be drawn off largely unhindered. In the passive position, the ring element does not affect the braking function.
  • a piston actuated by the pneumatic drive control is reliable even over long service lives.
  • oppositely acting pistons with different action surfaces can act, which simplifies the control.
  • An embodiment is structurally simple in which the support ring itself forms the piston which is acted upon pneumatically in one or in the two directions of movement and is guided in the holding member.
  • piston-like extensions on the support ring can also be used in order to keep the number of parts as low as possible.
  • the support ring is quickly returned in an appealing manner, since the compressed air acting in the opposite direction is suddenly released via the pneumatic drive control.
  • the return spring saves compressed air energy.
  • the at least one sliding drive body can be moved out of the removal path of the thread brake element in order to replace it quickly and easily when worn and / or when required.
  • the removal side of the holding member expediently points to the front end of the storage drum, where unimpeded access is possible.
  • the return spring is accommodated in the at least one sliding drive body, then it is particularly expedient to arrange a supporting surface in the holding member such that when the sliding drive body is pivoted into the removal position, the prestressed return spring is automatically intercepted in the prestressed state. After inserting a new thread braking element and swiveling the sliding drive body back, the return spring automatically returns to its active position on the ring.
  • the sliding drive body is locked in a self-locking manner when it is replaced by the return spring supported on the support surface.
  • several sliding drive pairs are distributed in the circumferential direction on the holding member.
  • the pneumatically actuated sliding drives can be connected to a common compressed air supply. However, it is also conceivable to provide a separate compressed air supply with a separate control valve for each sliding drive in order to be able to quickly provide or relax a relatively large amount of compressed air for each sliding drive.
  • the controlled outlet brake with an annular membrane arranged in the support ring with an uninterrupted counter-braking surface is particularly expedient.
  • the membrane forms a built-in radially and axially elastic spring in the thread braking element, which leads to a desirable self-compensation effect of the outlet outlet, ie the thread tension increases only slightly or not at all as the thread speed increases and therefore a relatively high basic thread tension can be set
  • this has the important advantage that the multi-disc brakes for increasing the thread tension, which were often provided downstream of the thread delivery device, can be dispensed with, the influence of which is undesirably strong during the drawing stroke.
  • the relatively high basic thread tension is, however, reduced or eliminated thanks to the pneumatically operated sliding drives if no significant thread tension is required during an entry.
  • the thread braking element can also be a so-called brush, tooth or plate ring with individual or group-wise resiliently deformable braking elements and a discontinuous circumferential braking surface, whose thread tension increases with increasing thread speed or increases the braking effect by means of then pneumatically operated sliding drives is eliminated or significantly weakened if this is not desirable in a particular entry phase.
  • Fig. 1 is a side view, partly in section "a Fa ⁇ denuntervorraum for a projectile or gripper weaving machine, in an operating position,
  • FIG. 2 shows a detail section of FIG. 1, in another operating position
  • FIG. 6 shows a partial sectional view of a further embodiment in an operating position
  • Fig. 11 is an operational diagram of Fig. 9, and
  • FIG. 12 shows an operating diagram for FIG. 10.
  • a thread delivery device F of a type known per se has a stationary storage drum 1 on which a plurality of thread turns 2a - 2n to form an intermediate supply or a reserve of a thread
  • the thread Y coming from a supply spool (not shown) is fed to the thread delivery device by a hollow drive shaft which can be driven by means of an electric motor (not shown) in a motor housing 3 and by means of a hollow arm (not shown) which can be driven by the drive shaft for rotation. brought to the storage drum 1.
  • the yarn delivery device F is arranged between the supply spool, not shown, from which the yarn Y is unwound by the yarn delivery device, and a textile machine (not shown). The textile machine is consuming the thread
  • the thread delivery device F is used to deliver a weft thread for a weaving machine in order to draw off a quantity of thread turns 2a - 2n corresponding to a plurality of thread turns 2a - 2n by means of insertion of the weaving machine with each insertion cycle (weft), then the thread Y is removed from the Thread reserve deducted.
  • the yarn Y is drawn off from the storage drum 1 in the axial direction by means of the entry means of the weaving machine via a pull-off edge 4 of the storage drum, which is preferably slightly rounded, and runs downstream through a pull-off eyelet 5 arranged axially to the storage drum 1.
  • the thread Y can be guided through a free-standing, controlled or alternatively non-controlled thread brake (not shown) and / or through a thread take-up device (take-up device).
  • a thread delivery device F is used to deliver thread Y to a projectile weaving machine, in which the weft thread is transported through the shed with each weft by means of a projectile-like gripping member.
  • a slide is axially displaceably arranged in the thread delivery device F and carries a ring-shaped holding member 7 for a run-out brake OYB.
  • the ring-shaped holding member 7 carries a thread braking element 8, which was recently launched on the market under the name "Flexbrake” and essentially comprises a frustoconical circular ring or a frustoconical band made of elastic material, preferably rubber, having. Due to the design and arrangement, the circular ring of the thread braking element 8 forms an uninterrupted or continuous contact line or contact surface in the circumferential direction for contact against the rounded trigger edge 4 of the storage drum 1. The trigger edge 4 also forms a rotationally symmetrical braking surface 4 'for the counter surface or Anti-braking line defining contact line of circular ring 8.
  • the circular ring of the thread brake element 8 is provided on its inner, "brake-active" inner region 8a with a thin covering made of a material resistant to thread friction, for example made of a metal or a metal alloy, expediently a stainless steel or a beryllium Copper alloy.
  • the brake-active inner area or the lining of the thread brake element 8 is characterized by a considerable axial rigidity and a remarkable flexibility or elasticity in the radial direction and by preferably low inertia (mass).
  • the circular ring of the thread braking element 8 is formed in its area facing the annular holding member 7 with or in a central section 8b with one or more circumferential "corrugations" in order to increase the elasticity of the central section 8b.
  • the central region 8b of the thread brake element 8 is mounted inside in a support ring 9, which in turn is encompassed by the annular holding member 7.
  • an operator can predetermine the force with which the thread braking element 8 rests on the pull-off edge 4 (or the braking surface 4 ') of the feeder drum 1.
  • the operator can thereby set a "basic tension" which the thread Y receives when it passes through the storage drum 1 between the braking-passive inner region 8a of the thread braking element 8 and the rounded take-off edge 4 when it is pulled off.
  • the new type of run-out brake has proven very advantageous and positive properties in particular for providing favorable thread tension conditions during each entry process in a weaving machine.
  • This outlet brake has a self-compensation effect insofar as the tension 'in the thread downstream of the outlet brake does not increase appreciably with increasing thread speed.
  • the thread brake element 8 is arranged in FIGS. 1 and 2 in such a way that it can be displaced in a controlled manner in the axial direction, such that its brake-active inner region has a number of, expediently two, positions in relation can take to the rounded trigger edge 4.
  • the thread brake element is arranged in such a way that it assumes a first axial position (corresponding to FIG. 1) in which its brake-active inner area is "normal” with a certain, preselected force against the trigger edge 4 (or the braking surface 4 1 ) is applied. This force is predetermined by the axial position of the carriage (not shown). This force results in a specific, preselected tension in the thread.
  • the thread braking element is arranged in such a way that it is able to assume a second axial position (according to FIG. 2), in which the brake-active inner region 8a of the thread braking element 8 is "released" from the trigger edge 4, ie is no longer in contact with the trigger edge 4 .
  • the thread tension falls to a low or in any case considerably lower level than is the case with the thread braking element 8 in its first axial position.
  • the controlled axial displacement of the thread brake element 8 can be realized in several ways.
  • the support ring 9 is arranged such that it can move axially within the holding member 7, for example by selecting its extent in the axial direction.
  • a first pneumatic cylinder 10 with a piston 10a is provided in order to cooperate with the rear end face or the rear edge of the support ring 9.
  • a second pneumatic cylinder 11 with a piston 11a is provided in order to cooperate with the front end face or the front edge of the support ring 9 and a base part 8c of the thread braking element 8.
  • the first cylinder 10 is connected directly to a compressed air source CAS, whereas the second cylinder 11 can be connected to the same pressure source via a three-way solenoid valve 12 of a known design.
  • a control unit (not shown) is electrically connected to the valve 12 and expediently designed so that it controls the valve 12 synchronously with the textile machine, which is supplied by the thread delivery device F. This means that in the case of a weaving machine, the control takes place synchronously with the weaving cycle, preferably in accordance with a desired, appropriate thread tension during the respective phases of the weft insertion cycle, such as the acceleration phase, the "flight phase", the deceleration phase, etc.
  • the functional description of the exemplary embodiment shown begins in the operating position of FIG. 1.
  • the control unit keeps the solenoid valve 12 in its inactive state, as a result of which the piston 11a in the second cylinder 11 remains in its left end position. Since the first cylinder 10 is directly connected to the compressed air source CAS ', the piston 10a always strives towards its right end position. However, in this starting position, the force on the support ring 9 and consequently also on the thread brake element 8 as a whole, which is exerted by the piston 11a, is greater than the force of the piston 10a, due to the fact that the piston 11a has a larger cross-sectional area ⁇ che than the piston 10a.
  • the stroke of the axial displacement movement of the thread braking element 8 with its support ring 9 expediently does not have to be more than a few millimeters in order to achieve the desired function or the result.
  • the time for the "switching" or moving the thread braking element between its working positions can be approximately 10-15 milliseconds in the exemplary embodiment described.
  • the axial displacement of the thread braking element 8 could be effected in various ways, e.g. by means of electromagnets or solenoids which act directly on the carrier ring 9, or alternatively by means of displacement devices which are controlled with piezo crystal elements (since the necessary switching movement is so small), or with other known types of linear adjusting devices.
  • pneumatic displacement unit cylinders 10 and 11
  • the number of such units should expediently be at least three, and that these units are distributed uniformly around the circumference of the thread braking element in order to ensure sufficient homogeneity and speed when moving the thread braking element.
  • FIGS. 3, 4 and 5 another embodiment of a pneumatically actuated outlet brake OYB is provided in the holding member 7 on the extension arm 6 of the thread delivery device.
  • the basic axial setting of the shark The link 7 and thus the basic setting of the thread tension when the outlet brake is engaged is selected by a slide 22 connected to the holding link 7 in guides 24.
  • the carriage can be moved by means of an adjusting member 23; however, it is stationary during operation.
  • the holding member 7 is open to the removal side E (to the front end of the storage drum 1) and has receptacles 16 for sliding drive bodies 14 which are distributed over the circumference and which are either together or individually between a holding position (in solid lines) drawn) and a removal position (indicated by dashed lines in FIG.
  • each sliding drive body 14 engages behind the support ring 9 of the thread braking element 8, which is shown in FIGS. 3 - 5 is a so-called bristle ring with flexible bristles or tufts of bristles, which preferably extend obliquely inclined from the support ring 9 inwards and define an elastically deformable central section 8b 'and an inner ' braking-active inner area 8a 1 which acts as a counter-braking surface cooperates with the braking surface 4 'at the trigger edge 4.
  • Two oppositely acting slide drives 10 ', 11' are arranged in the holding member 7.
  • the sliding drive 10 ' contains the piston 10a' in a sliding guide or chamber 12 ', which is guided in a sliding sleeve 13 for better sealing and clean guidance and can be pressurized with compressed air from the pneumatic drive control 12 (see FIG. 1) or can be relieved.
  • a radial surface forms a first ring contact region 20, which is opposed in the axial direction by a contact region 21 on the slide drive bodies 14.
  • the distance between the contact areas 20 and 21 is, for example by 2 to 4 mm, larger than the axial width of the ring 9 of the thread braking element 8 '.
  • the piston 10a ' can be extended via the first contact area 20.
  • each sliding drive body 14 an axially arranged return spring 19 is recovered in a recess, which preferably acts on the support ring 9 via a piston-like sleeve 18. strikes.
  • the return spring 19 is preloaded and can be extended via the second contact area 21.
  • the receptacle 16 for the slide drive body 14 is dimensioned so large that the slide drive body 14 is moved out of the removal path of the support ring 9 after rotation about the retaining screw 15.
  • the thread braking element 8 * can be lifted out to the removal side E and replaced by a new or a different thread braking element (for example the thread braking element 8 according to FIG. 1).
  • thread brake elements that can be used for this purpose are so-called toothed rings, which have elastic teeth made of plastic or another material (similar to an annular comb) that protrude inwards in the support ring 9, or a multi-disc brake ring that has a metal plate that projects inwards in the support ring 9 or Plastic slats carries.
  • the thread braking elements mentioned above have approximately the same outside diameter of the support rings 9, they can optionally be replaced with one another.
  • a support surface 17 for the return spring 19 is provided in the receptacle 16, in such a way that it lies approximately at the height of the rear end face of the support ring 9 when it is pressed against the first contact area 20. It is thereby achieved that when each sliding drive body 14 is rotated, the prestressed return spring 19 or the sleeve 18 slides onto the support surface 17 for the purpose of removing the respective thread braking element, without the return spring 19 being able to relax. Due to the force of the return spring 19 on the support surface 17, the sliding drive body 14 is automatically secured in position in the removal position.
  • the return spring 19 which is still biased and pushed back, is moved back onto the support ring 9 when the sliding drive body 14 is turned back. As soon as it is released from the support surface 17, the sliding drive 11 'is again functional. 3, the piston 10a 'is not acted upon pneumatically.
  • the return spring 19 holds the support ring in contact with the first contact area 20.
  • the outlet brake OYB works with the contact pressure set by the position of the slide 22.
  • each piston 10a 'from the pneumatic drive control 12 is pressurized, the support ring 9 is suddenly moved axially against the force of the return spring 19 onto the second contact area 21, the braking-active inner area 8a 1 expediently only braking surface 4' more weak or not touched at all.
  • This operating position is indicated in FIG. 4.
  • Each sliding drive body 14 is expediently secured in the holding position by tightening the holding screw 15.
  • the yarn feeding device F serve the shift actuators 10 'and 11' for axially Ver ⁇ push a to the axis of the storage drum 1 concentric annular element 27, the elastically ⁇ deformable with a sliding end 28 Middle section 8b 'of the thread braking element 8' (here a bristle ring) is acted upon directly radially within the support ring 9.
  • the support ring 9 is fixed in place in the holding member 7, for example by means of an easily removable securing ring 26.
  • the two slide drives 10 "and 11" are combined with one another, ie the Piston 10a "in the sliding guide 12 'engages the ring element 27 by means of a piston rod 29, which can be coupled at 30 to the ring element 27, while the return spring 19' is arranged on the piston rod 29 and against a stop at the end of the sliding guide 12 '.
  • the piston 10a " By means of the piston 10a ", the ring element 27 in FIG.
  • the return spring 19 Resets the ring body 27 until the braking-active inner region 8a' bears against the braking surface 4 'with the force preselected by the position of the carriage 22.
  • the return spring 19 'could also be arranged on the right side of the ring element 27, so that the piston 10a "acts directly on the ring element 27. Pistons which can be acted upon pneumatically could also be used for both directions of movement, as in FIG. 1 reverse installation of the piston 10a "and the return spring 19 'would also be possible.
  • a Flexbrake brake element 8 according to FIGS. 1 and 2 or a toothed ring or a disk ring could be used.
  • the support ring 9 in the holding member 7 simultaneously forms one Piston K of the pneumatic sliding drive 10 '.
  • the return spring 19 is either accommodated in a sliding drive body 14 of the sliding drive 11 'for the other direction of movement, as in FIGS. 3 to 6, or - as shown - in a recess in the support ring 9, so that a tab-like projection 33 which is pivotable about an axis 34 in the holding member 7 to the side, can be used.
  • the support ring 9 is acted upon directly by the pneumatic drive control 12 with compressed air, possibly over several distributed inlets.
  • the first contact area is located in the interior of an annular chamber 32 of the holding member 7.
  • the annular chamber 32 forms inner and outer sealing areas 35 with the support ring 9.
  • a type of piston ring seal is provided, which also applies to the pistons 10a, 11a or 10a "and 10a 7 could be provided in order to keep the compressed air leakage low and to ensure a consistently low displacement resistance of the respective piston.
  • a bristle brake ring is again shown as the thread brake element 8 'in Fig. 7. The individual bristles are identified by Q, which with their inner sides define the brake-active inner region and thus a counter-braking surface L.
  • a Flexbrake thread brake element 8 or a toothed ring or a disk ring could also be used for the same purpose.
  • a plurality of cylindrical projections distributed over the circumference are attached to the support ring 9 as pistons 10a " 1 , preferably molded in one piece, which are inserted into sliding guides 12 'of the holding member 7 and pressurized with compressed air therein. They form the Sliding drives 10 'responsible for one direction of movement, which are distributed at uniform intervals over the circumference of the holding member 7.
  • the sliding drives 11' responsible for the other direction of movement are designed, for example, as in FIGS. 3 to 5 and are provided with return springs 19 , so that a detailed explanation is unnecessary.
  • the thread brake element 8 is a Flexbrake thread brake 1 and 2 with an annular or truncated cone-shaped membrane M made of rubber or an elastic elastomer, which contains at least one circumferential corrugation W, which increases its elasticity and suspension properties in the radial and axial directions.
  • a circumferential brake lining H with a truncated cone shape is attached, for example glued, on the inside of the central section 8b of the membrane M lying within the corrugation W, which defines the counter-braking surface L for the braking surface 4 ′ of the trigger edge 4.
  • the brake pad H consists of a material which is resistant to thread friction, for example stainless steel or a copper-beryllium alloy, and is relatively stiff in the axial direction, but remarkably elastic in the radial direction.
  • a different thread braking element could be used instead of the thread braking element 8.
  • a projectile weaving machine MP is indicated schematically and with only one thread delivery device F.
  • the Faden ⁇ delivery device F is aligned with the shed S and fixed stationary at a distance from it.
  • the thread Y comes from a supply spool (not shown) and is temporarily stored in sufficient quantity on the storage drum of the thread delivery device and drawn off by the controlled outlet brake OYB in the holding member 7.
  • a stationary thread eyelet, behind which a controlled thread brake B is located, can be provided in the thread path from the thread delivery device into the shed S.
  • a pick-up device T which is controlled in dependence on the weaving cycle and has at least one arm which can be moved up and down relative to fixed thread guide points and grips the thread Y.
  • a catch device G for the projectile is provided at the other end of the shed S.
  • the controlled thread brake B is controlled and loaded by a control unit CP of the projectile weaving machine MP depending on the weaving cycle.
  • a separate control unit C which controls a drive D, may be located.
  • the control unit CP and / or the control C is connected via a line 40 to the pneumatic drive control 12 of the outlet brake OYB in such a way that the outlet brake OYB is opened or closed approximately synchronously with the controlled thread brake.
  • the pneumatic drive control 12 (the solenoid valve of the drive control 12) can be connected via its own control line 39 to a sensor 38, which is aligned with a sensor 37 that can be rotated with the main shaft 36 of the projectile weaving machine MP in order to, depending on the angle of rotation of the main shaft 36 Control commands for releasing or engaging and also tapping the times by which the coasting brake OYB should be released or engaged.
  • the thread Y held ready in the drive device A is first transferred to a projectile P and then shot through the shed S by means of the projectile P before the projectile P with the thread Y associated therewith is caught in the catching device G. .
  • the controlled thread brake B is released and also the controlled outlet brake OYB on the thread delivery device F.
  • the controlled thread brake B is engaged and, approximately synchronously, the controlled outlet brake OYB.
  • the controlled thread brake OYB is expediently engaged somewhat prematurely in order to prevent relaxation or sagging of the thread Y between the controlled thread brake and the thread delivery device F or to suppress balloon formation. It is important that the controlled run-out brake OYB is applied quickly so that on the one hand it works correctly for thread control but on the other hand it prevents a delay in projectile flight.
  • FIG. 11 illustrates the procedure for an entry.
  • the angle of rotation for one Rotation of the main shaft 36 of the projectile weaving machine MP is carried out, while the vertical axis represents the thread tension (cN) or the switching tension (V) for the solenoid valve.
  • the curve 42 symbolizes the course of the thread tension, while the curve 46 represents the loosening and engagement and the sections of the angle of rotation via which the outlet brake is engaged or disengaged.
  • the weft insertion begins at a rotation angle of, for example, 110 °.
  • the thread tension increases to a certain extent as soon as the projectile P accelerates and then runs approximately uniformly until the thread tension level initially rises in a curve region 43 due to the controlled thread brake B and then drops when the projectile P comes to a standstill and is returned .
  • a dreaded stretching stroke occurs, which is represented by the tension peak 44 indicated by the broken line.
  • the stretching stroke 44 can be largely minimized or avoid completely, so that a harmonic curve is created in the area 45.
  • the controlled run-out brake OYB remains released until near the end of the entry and is only engaged (indicated at 48) shortly before the controlled thread brake B is applied. It then remains indented beyond the end of the entry in order to control the thread between the thread delivery device and the controlled thread brake in a precisely predetermined manner. Regardless of whether the OYB outlet brake is engaged or released, it permanently performs a balloon limiter or balloon breaker function.
  • a rapier weaving machine MR with only one thread delivery device F is shown schematically in FIG.
  • a feeder gripper BG and a slave gripper NG which are motion-controlled via a drive device 41 and a central control unit CP, serve as the input device in such a way that they insert the thread Y from one side of the shed S to the other side of the shed.
  • the bringer gripper BG transfers the thread in a transfer area Ü to the slave gripper NG, which completely transports the thread through the shed S.
  • the control unit CP is expediently connected to the pneumatic drive control 12 of the controllable outlet brake OYB in the holding member 7 of the thread delivery device in order to release or engage the controlled outlet brake OYB several times during each entry.
  • the rotary movement of the main shaft of the rapier weaving machine MR from 0 ° to 360 ° is plotted on the horizontal axis.
  • the vertical axis represents the thread tension (cN) or the switching voltage (V) for the solenoid valve of the pneumatic drive control 12.
  • An approximately heart-shaped curve 49 results for the course of the thread tension via a weft insertion.
  • the thread tension increases due to the acceleration of the grippers.
  • the curve part 50 with a low thread tension level is formed in the transfer area.
  • An uncontrolled thread brake and, if appropriate, even at least one multi-disc brake with a fixed setting downstream of the thread supply device are usually provided on the thread supply device.
  • the stretching stroke 44 can be considerably minimized or eliminate completely.
  • the outlet brake OYB may only be solved immediately before the start of the entry so that the thread Y is not left to itself beforehand or to let it relax. In the transfer area Ü from the gripper to the slave gripper, it is necessary for a perfect thread transfer to build up a certain tension.
  • the controlled coasting brake OYB is applied during the transfer phase and after the transfer phase (represented by 55) it is quickly disengaged before it (repr ⁇ sent by 56) is indented again.
  • the rapier weaving machine MR "comes without downstream the thread delivery device F arranged permanently acting brakes which would have a negative effect on the course of the tension (stretching impact and high peak areas 51).
  • the solenoid valve of the pneumatic drive control 12 is accommodated inside the motor housing 3 in a protected manner and the supply lines are concealed.
  • the solenoid valve allows the compressed air fed to act on the pistons to flow out directly when switching over, expediently inside the motor housing in order to prevent the ingress of impurities and lint by an overpressure effect or a dynamic flow. It is even possible to direct compressed air in order to keep critical areas (the electronic components) in the motor housing or the sensor devices normally provided clean or to clean them, or to cool them in general.
  • a solenoid valve supplying or relieving all pneumatically operated slide drives is normally sufficient.
  • the piston, the holding member 7 and any sliding guides of the sliding drives can be made of metal.
  • the support ring 9 of the thread braking element is expediently a plastic part which is shaped in such a way that it is dimensionally stable with the lowest mass.
  • the braking surface 4 1 is arranged either in the region of the trigger edge 4 of the storage drum, or also on the so-called front cone or nose part of the storage drum. In the first case, the braking surface and the counter-braking surface work together on a diameter of the storage drum that is slightly smaller than the diameter on which the thread turns 2a-2n lie.
  • the diameter on which the braking surface cooperates with the counter braking surface is smaller than in the first case.
  • the control in the controllable outlet brake OYB depending on the course of the entry is preferred.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Prostheses (AREA)

Abstract

L'invention concerne un frein de fil commandé pour un système d'alimentation en fil, qui comprend des éléments d'actionnement (10, 11) connectés à un élément de commande (12) et destinés à assurer un déplacement régulé de l'élément de freinage de fil (8), qui utilisent le jeu axial de la bague porteuse (9) dans son support dans un élément de retenue (7) pour réguler la tension du fil (Y). Dans ce type de système d'alimentation en fil (F), un mécanisme d'entraînement par glissement (10, 11, 10', 11', 10", 11") relié à l'élément de retenue (7) est prévu pour chacun des sens de déplacement de l'élément de freinage (8, 8'). Pour au moins un sens de déplacement, ce mécanisme d'entraînement par glissement est pneumatique et est raccordé à une commande d'entraînement (12) pneumatique. Dans un métier à projectile, le frein de fil commandé est désenclenché et enclenché de manière approximativement synchrone avec un autre frein de fil commandé, l'enclenchement du premier frein de fil commandé s'effectuant de préférence avant celui du second frein de fil commandé. Dans un métier à navettes à pince, le tendeur commandé est désenclenché et réenclenché à plusieurs reprises pendant chaque formation de trame.
EP95907619A 1994-01-26 1995-01-26 Frein de fil, systeme d'alimentation en fil et metier a tisser a navettes a pince ou a projectile Expired - Lifetime EP0741808B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9400248A SE9400248D0 (sv) 1994-01-26 1994-01-26 Styrbar utgångsbroms för garnmatningsanordning till textilmaskiner, i synnerhet vävmaskiner av projektil eller gripar-typ
SE9400248 1994-07-15
PCT/EP1995/000284 WO1995020700A2 (fr) 1994-01-26 1995-01-26 Frein de fil, systeme d'alimentation en fil et metier a tisser a navettes a pince ou a projectile

Publications (2)

Publication Number Publication Date
EP0741808A1 true EP0741808A1 (fr) 1996-11-13
EP0741808B1 EP0741808B1 (fr) 2000-07-12

Family

ID=20392702

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95907619A Expired - Lifetime EP0741808B1 (fr) 1994-01-26 1995-01-26 Frein de fil, systeme d'alimentation en fil et metier a tisser a navettes a pince ou a projectile

Country Status (11)

Country Link
US (1) US5778943A (fr)
EP (1) EP0741808B1 (fr)
JP (1) JPH09508182A (fr)
KR (1) KR100371989B1 (fr)
CN (1) CN1040676C (fr)
CZ (1) CZ288320B6 (fr)
DE (1) DE59508564D1 (fr)
ES (1) ES2149967T3 (fr)
RU (1) RU2135657C1 (fr)
SE (1) SE9400248D0 (fr)
WO (1) WO1995020700A2 (fr)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19533310A1 (de) * 1995-07-24 1997-01-30 Iro Ab Fadenliefergerät
WO1997003908A1 (fr) * 1995-07-24 1997-02-06 Iro Ab Dispositif d'amenee du fil
DE19542045A1 (de) * 1995-11-10 1997-05-15 Iro Ab Fadenliefergerät
DE19609871A1 (de) * 1996-03-13 1997-09-18 Iro Ab Fadenliefergerät
DE19612720A1 (de) * 1996-03-29 1997-10-02 Iro Ab Fadenliefergerät
SE9700666D0 (sv) * 1997-02-24 1997-02-24 Iro Ab Fadenliefergerät und fadenbremse
DE19919122A1 (de) * 1999-04-27 2000-11-02 Iro Patent Ag Baar Aktuator und Fadenbremse mit einem Aktuator
NL1018600C2 (nl) * 2001-07-20 2003-01-21 Te Strake Bv Weefmachine.
ITTO20010737A1 (it) * 2001-07-25 2003-01-25 Lgl Electronics Spa Metodo e sistema perfezionati di controllo dei dispositivi frenatramaelettrocomandati per la regolazione automatica della tensione meccanic
DE10153326A1 (de) * 2001-10-29 2003-05-08 Iropa Ag Fadenverarbeitendes System
DE102005007842A1 (de) * 2004-11-05 2006-05-11 Iro Ab Fadenbremsvorrichtung
EP1811068B1 (fr) * 2006-01-24 2009-06-17 Sultex AG Frein de trame avec commande
JP4955325B2 (ja) * 2006-07-11 2012-06-20 津田駒工業株式会社 織機のロールの支持装置
EP2058423A1 (fr) 2007-10-10 2009-05-13 Iro Ab Machine à tisser, passe-fil et procédé d'insertion d'un passe-fil
EP2169099A1 (fr) * 2008-09-25 2010-03-31 L.G.L. Electronics S.p.A. Dispositif d'alimentation négative de fils avec un dispositif de freinage de trame
DE202009017125U1 (de) * 2009-12-18 2010-04-15 Flexi-Bogdahn Technik Gmbh & Co. Kg Bremseinrichtung für eine Seilrolle einer mechanisch auf- und abrollbaren Leine zum Führen von Tieren
JP5804306B2 (ja) * 2011-02-07 2015-11-04 村田機械株式会社 糸貯留装置及び糸巻取機
ITTO20111218A1 (it) * 2011-12-28 2013-06-29 Lgl Electronics Spa Alimentatore di filato a tamburo fisso con dispositivo frena-trama controllato
ITTO20111217A1 (it) 2011-12-28 2013-06-29 Lgl Electronics Spa Dispositivo frena-trama per alimentatori di filato a tamburo fisso
CN105951280B (zh) * 2016-07-07 2018-04-13 安徽省兰飞化纤织造有限公司 一种织造筛网的片梭织机
CN106435962B (zh) * 2016-11-18 2018-01-16 浙江三禾智能科技有限公司 一种储纬器恒力式的快速调节装置
DE102018115604A1 (de) * 2018-06-28 2020-01-02 Memminger-Iro Gmbh Fadenliefergerät

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH523196A (de) * 1970-05-14 1972-05-31 Sulzer Ag Speichereinrichtung für fadenartiges Material
CH669804A5 (fr) * 1986-05-15 1989-04-14 Sulzer Ag
EP0855358B1 (fr) * 1990-03-12 2001-10-17 Iro Ab Fournisseur de fil
IT1251209B (it) * 1991-09-20 1995-05-04 Lgl Electronics Spa Dispositivo di frenatura autoregolante del filato per apparecchi alimentatori di trama.
US5316051A (en) * 1991-09-20 1994-05-31 L.G.L. Electronics S.P.A. Self-adjusting thread braking device for weft feeder units
IT1259551B (it) * 1992-04-22 1996-03-20 Lgl Electronics Spa Dispositivo elettropneumatico per l'infilaggio automatico di apparecchi alimentatori di trama a macchine tessili ed apparecchio alimentatore di trama incorporante detto dispositivo
DE4219306A1 (de) * 1992-06-12 1993-12-16 Iro Ab Verfahren und Vorrichtung zum Liefern von Schußfäden
IT1268111B1 (it) * 1994-10-10 1997-02-20 Lgl Electronics Spa Dispositivo di frenatura modulata positiva del filato, per apparecchi alimentatori di trama
US5546994A (en) * 1994-10-14 1996-08-20 Sobrevin Societe De Brevets Industriels-Etablissement Thread storage drum with frustoconical brake strip

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9520700A2 *

Also Published As

Publication number Publication date
US5778943A (en) 1998-07-14
CN1139963A (zh) 1997-01-08
KR970700794A (ko) 1997-02-12
WO1995020700A3 (fr) 1995-09-14
CN1040676C (zh) 1998-11-11
RU2135657C1 (ru) 1999-08-27
DE59508564D1 (de) 2000-08-17
WO1995020700A2 (fr) 1995-08-03
CZ288320B6 (en) 2001-05-16
CZ218396A3 (en) 1997-01-15
SE9400248D0 (sv) 1994-01-26
JPH09508182A (ja) 1997-08-19
EP0741808B1 (fr) 2000-07-12
ES2149967T3 (es) 2000-11-16
KR100371989B1 (ko) 2003-03-19

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