EP0521819A1 - Dispositif de stockage de fil de trame pour un métier à tisser - Google Patents

Dispositif de stockage de fil de trame pour un métier à tisser Download PDF

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Publication number
EP0521819A1
EP0521819A1 EP92810388A EP92810388A EP0521819A1 EP 0521819 A1 EP0521819 A1 EP 0521819A1 EP 92810388 A EP92810388 A EP 92810388A EP 92810388 A EP92810388 A EP 92810388A EP 0521819 A1 EP0521819 A1 EP 0521819A1
Authority
EP
European Patent Office
Prior art keywords
weft thread
weft
impeller
compressed air
winding 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.)
Withdrawn
Application number
EP92810388A
Other languages
German (de)
English (en)
Inventor
Antonius Josephus Maria Hamer
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.)
Sulzer AG
Original Assignee
Sulzer AG
Gebrueder Sulzer AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sulzer AG, Gebrueder Sulzer AG filed Critical Sulzer AG
Publication of EP0521819A1 publication Critical patent/EP0521819A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • D03D47/363—Construction or control of the yarn retaining devices

Definitions

  • the invention relates to a weft thread store for a weaving machine, with a fixedly arranged, drum-like winding body, which has a number of circumferential elements that run essentially parallel to its longitudinal axis for receiving a weft thread that can be wound onto it via a rotating winder and can be pulled off in the axial direction, and with an adjusting device, which is controllable as a function of control signals of a control device which detects the length of the weft thread to be stored, for a rotatable adjusting element which is arranged within the winding body and by means of which the peripheral elements can be adjusted radially outward or inward in accordance with the respective direction of rotation of the adjusting element.
  • the invention further relates to a method for operating a weft thread store of the type mentioned.
  • the adjusting device contains a remote-controlled electric motor which is arranged within the winding body and which, for example, has a a dynamo coupled to the rotatable shaft and an accumulator arranged inside the winding body or, according to another embodiment, by magnetic induction, via transformers with primary windings arranged outside the winding former with iron core and secondary windings arranged inside the winding former with iron core, are supplied with current.
  • a remote-controlled electric motor which is arranged within the winding body and which, for example, has a a dynamo coupled to the rotatable shaft and an accumulator arranged inside the winding body or, according to another embodiment, by magnetic induction, via transformers with primary windings arranged outside the winding former with iron core and secondary windings arranged inside the winding former with iron core, are supplied with current.
  • the adjusting device can also be driven via electromagnets which are arranged outside the winding body and which interact with magnets arranged inside the winding body.
  • the supply of the drive energy and the control of the actuator require a relatively complex, multi-part construction of the winding body, which is generally to be as compact as possible.
  • the object of the invention is to create a weft thread storage device that is improved in this respect in particular, with an adjustment device that is simplified and can be controlled with little effort in a robust, compact design.
  • the adjusting device contains an impeller which is coupled to the adjusting element and can be acted upon by compressed air and at least one compressed air supply line, which can be adjusted via at least one control member, which in each case is adjustable between a flow position and a blocking position via the control device is connected to a compressed air source and via which the impeller can be driven either in one or in the other direction of rotation.
  • the impeller which can be acted upon in both directions of rotation, provides a drive for the adjusting device which can be controlled in a simple manner and which guarantees an operationally reliable, automatic readjustment of the peripheral elements with little maintenance.
  • a weaving machine 1 that are essential for the explanation of the invention are shown with a fabric 4 formed by warp threads 2 and weft threads 3.
  • the weaving machine 1 contains a number of stationary weft supply bobbins 5, only one of which is shown and of which one weft 3a is fed through a thread eyelet 6 to a stationary weft storage 7.
  • the weft store 7 contains a fixedly arranged, drum-like winding body 8 and a winder 11 which can be rotated about its longitudinal axis 10, through which the weft 3a is drawn off from the supply spool 5 and to form a weft supply required for one weft insertion - or for several, e.g.
  • weft thread 3a is guided from the winding body 8 through a further guide eye 12 into a weft insertion nozzle (main nozzle) 13 of the weaving machine 1.
  • a weft insertion nozzle 13 the weft thread 3a is withdrawn from the winding body 8 in the axial direction overhead and, optionally supported by additional relay nozzles, not shown, distributed over the weaving width, into a shed formed between the warp threads 2 during a time period provided for a weft insertion registered.
  • the inserted weft thread 3a is gripped near the lateral edges of the fabric 3 by holding means (not shown), cut off by a cutting device 14 arranged on the entry side of the shed, struck on the fabric 4 by a reed (not shown) and then bound in by a subsequent change of subject. From a weft thread supply which has meanwhile been added to the bobbin 10 or from another, e.g. With a different colored weft wound bobbin, another weft can then be pulled off and inserted into the new shed.
  • the winder 11 can be operated in any manner, as shown via a belt drive, e.g. a toothed belt 16, coupled to the drive shaft of a motor 17, the speed of which can be set approximately at the beginning of the weaving operation to a value corresponding to the speed of a main shaft of the weaving machine 1 and the width of the fabric 4 to be produced.
  • the motor 17 can be connected to a not shown, e.g. from the aforementioned EP patent application 290 380 known control device can be connected, by which, depending on a sensor, for example, which detects the number of thread turns on the winding body 8, the motor 17 is switched off when a predetermined number of turns is reached and when falling below a predetermined number of turns is turned on.
  • a number of thread turns corresponding to the length of the weft thread 3a to be entered is drawn off from the winding body 8, the end of the weft insertion being initiated by actuation of a thread stopper 18 associated with the end of the winding body 8 on the withdrawal side, which stops at a predetermined turn counter, not shown monitored number of withdrawn thread turns by means of a locking pin 20 moved against the circumference of the winding body 8 prevents the weft thread 3a from further running out.
  • a corresponding thread stopper is known, for example, from EP patent application 0 344 100 (T.753).
  • an adjusting device 21 which can be influenced via a control device 22 is provided, by means of which the diameter of the winding body 8, and thus the length of the individual thread turns, can be changed in a manner to be described.
  • the tip of the weft thread 3a which protrudes from the insertion nozzle 13 against the cutting device 14 before the weft insertion, reaches the area of two thread sensors 23 and 24 arranged on the exit side of the shed, the distances from the cutting device 14 of which are each a minimum length Determine L1 or a maximum length L2 of the inserted weft thread 3a.
  • a further thread sensor can be arranged on the exit side of the shed, which triggers a signal to switch off the loom in the event of a weft break.
  • the tip of the inserted weft thread 3a should lie in the area between the thread sensors 23 and 24, a corresponding control signal being transmitted to the control device 22 via the thread sensor 23 and no control signal being emitted by the thread sensor 24; accordingly, the diameter of the winding body 8 is maintained. If the length of the weft thread entered is less than the predetermined minimum length L1 and the corresponding signal from the thread sensor 23 is thus absent, an increase in the diameter of the winding body 8 is initiated via the control device 22.
  • the weft threads 3a In air jet weaving machines, in which the weft thread entered at the exit side of the shed is in each case gripped by a stretching nozzle (not shown) and kept stretched to the sheet stop, the weft threads 3a must each be inserted with an excess length, which is cut off as waste after the sheet stop and therefore should be kept as low as possible.
  • different excess lengths When processing different yarns of different properties to be entered next to each other through the weft system, different excess lengths must generally be selected, since, for example, thin, smooth yarns or yarns with low tensile strength require a greater stretch length than thick, rough yarns which have greater tensile strength.
  • each of the weft thread stores 7 can be assigned its own sensor group, by means of which the setting of the diameter of the winding body 8 in question corresponding to the predetermined stretching length of the associated weft thread 3a can be influenced.
  • the operating conditions of the individual weft store 7 can be changed predetermined, possibly different weft lengths are kept substantially constant.
  • a thread sensor arranged on the weaving reed is provided, by means of which, when the reed leaves fall after the leaf stop, a control signal corresponding to the respective excess length of the weft thread 3a and related to the rotational angle position of the main shaft of the weaving machine to the Control device 22 is transmitted, the determined excess length being compared with a predetermined desired value, and a signal corresponding to the deviation from the desired value being generated for corrective adjustment of the diameter of the winding body 8.
  • the adjusting device 21 contains an impeller 25 which is arranged in the winding body 8 and which can optionally be pressurized with compressed air via two compressed air lines 30 and 31 and can be driven accordingly in one or the other direction of rotation.
  • the compressed air lines 30 and 31 can each be connected via a control valve 28 or 29 and a feed line 27 to a compressed air source, not shown.
  • the control valves 28 and 29 are - according to the control signals of the thread sensors 23 and 24 - adjustable via the control device 22 between a flow position and a blocking position.
  • the compressed air lines 30 and 31 can also be connected to a common switching element 32, for example a 3/2-way valve, which can be adjusted between two flow positions and a blocking position via the control device 22.
  • the control device 22 can also be connected to an input device 33 which can be programmed in accordance with the tissue to be manufactured in each case.
  • other control signals for example generated in the area of the thread stopper 18, which detect the number of thread windings drawn off, can also be transmitted to the control device 22 and used to control the compressed air supply to the impeller 25.
  • the weft thread store 7 contains a housing 36 which can be attached to the weaving machine 1 and in which a winder shaft 37 is rotatably mounted by means of roller bearings 38 (not shown).
  • the winder shaft 37 can be driven via a belt pulley 40 which is wrapped by the toothed belt 16 and is designed with an axial bore 41 to which an angled guide channel connecting the winder 11 connects.
  • the winder 41 is essentially tubular and is attached to the winder shaft 37, to which a rod 43 diametrically opposite the winder 11 is also attached as a mass balance.
  • the winding body 8 of the weft thread store 7 is rotatably mounted on the end of the winder shaft 37 via a roller bearing 44 and is secured against rotation by two magnets 45, 36 arranged on the housing and two magnets 46 which cooperate with the housing and are fastened to the winding body 8.
  • the winding body 8 has a holder 47 and a number, as shown eight, essentially parallel to the longitudinal axis 10, circumferentially offset circumferential elements 48, 48a, 48b, 48c, each of which is formed in the radially extending guide grooves 50 formed on the end of the holder 47 are held adjustable in the radial direction.
  • Circumferential elements 48 are provided with an adjusting disk 51 which is rotatably arranged in the holder 47 and which, according to the illustration, are designed with eight guide tracks 52 which each run from inside to outside in a spiral shape.
  • the peripheral elements 48, 48a, 48b, 48c are each provided with a guide rail 54 which can be inserted into one of the guide grooves 50 and on which a guide pin 53 which can be inserted into one of the guide tracks 52 is formed.
  • the circumferential elements 48, 48a, 48b, 48c are adjusted radially outward when the adjusting disk 51 is rotated in one direction of rotation, and radially inwardly when the adjusting disk 51 is rotated in the other direction of rotation.
  • the guideways 52 are arranged in overlapping segments of the adjusting disk 51, each of which extends over an arbitrary angle ⁇ , which, for example, can be approximately 150 ° as shown.
  • the peripheral elements 48, 48a, 48b, 48c are each adjustable between the outermost position shown in full lines in FIGS. 2 and 3 and an innermost position 48 ′ shown in FIG. 3 with dash-dotted lines.
  • the guide rails 54 are held in the guide grooves 50 by a pot-shaped, central housing section 55, the bottom of which is fastened to the holder 47 by means of screws 56.
  • the housing section 55 is designed with an opening located at the end of the winding body 8 on the take-off side, in which the impeller 25 of the adjusting device 21 is arranged.
  • the impeller 25 is designed in a design that is open toward the trigger side, with a curved wall 59 converging in the trigger direction and with radial blades 57, and is fastened on the fly on a drive shaft 58.
  • the drive shaft 58 is via needle bearings 60 in a in the housing section 55,
  • the housing 61 is fastened to the bottom and connected via a reduction gear provided in the housing 61, not shown, to an output shaft 62 which is coaxial with the winder shaft 37 and which is rotatably mounted in the housing 61.
  • the output shaft 62 can be connected at its free end in any manner, according to FIG. 4, to the adjusting disk 51 in a rotationally fixed manner via a driving sleeve 63 which can be inserted into a central elongated hole of the adjusting disk 51.
  • a thread stopper 18 and a holder 67 for the compressed air lines 30 and 31 are fastened by means of screws 65 and 66 to an extension 36a of the housing 36 projecting against the end of the winding body 8 on the take-off side.
  • the holder 67 can be attached to the housing of the thread stopper 18.
  • the thread stopper 18 can e.g. from EP patent application 0 344 100, already mentioned, containing an electromagnet, by means of which the locking pin 20 can be adjusted between an inoperative operating position located at a distance from the adjacent peripheral element 48 and a locking position, in which the locking pin 20 is in an on the relevant peripheral element 48 provided bore 68 protrudes and thus prevents the weft thread 3a from being pulled off.
  • the compressed air lines 30 and 31 are set on the holder 67 in such a way that, in the outermost position of the adjacent peripheral elements 48a, 48b and 48c, they are held by them in a radial permitting the thread take-off and against two passage channels 70 and 71 provided on the housing part 55 are directed, which are substantially tangential to two diametrically opposite circumferential portions of the impeller 25.
  • the passage channels 70 and 71 can be separated by two at the end of the wall on the exhaust side Housing part 55 provided groove-like incisions may be formed.
  • the peripheral elements 48, 48a, 48b, 48c are each designed with a width such that they form an essentially closed polygonal peripheral surface of the winding body 8 in their inner positions 48 '.
  • the circumferential elements 48a, 48c and 48b adjacent to the compressed air lines 30 and 31 are each provided with a recess 72 or two recesses 72 at their free ends, which flow freely in each radial position of these circumferential elements allow the passage channels 70 and 71 with the compressed air supplied to act on the impeller 25.
  • the circumferential elements 48, 48a, 48b, 48c can be operated by manual actuation of the control valve 28 or 29 or the switching element 32 or - when the weaving machine is at a standstill - by manually adjusting the adjusting disk 51 in a predetermined basic setting, for example to a maximum effective diameter of the winding body 8 can be adjusted.
  • the desired length of the inserted weft thread 3a can be set or corrected semi-automatically by manual actuation of the control valves 28, 29 or the switching element 32 and, if necessary, by adjusting the thread stopper 18 and / or the thread sensors 23, 24.
  • one of the compressed air lines 30 and 31 is optionally connected to the compressed air supply in the manner already described, when the minimum weft length L1 is undershot or the maximum weft length L2 is exceeded, via the correspondingly influenced control device 22, the impeller 25 being connected via the Passage channel 70 and 71 acted upon and is rotated clockwise or counterclockwise and the compressed air flows out of the impeller 25 essentially in the axial direction.
  • the adjusting disk 51 is rotated via the gear arranged in the housing 61, so that the peripheral elements 48, 48a, 48b, 48c are adjusted radially inwards or outwards until the diameter of the winding body 8 corresponding to the predetermined length of the weft thread 3a to be inserted is reached , whereupon the supply of compressed air to the impeller 25 is interrupted by the corresponding combination of the control signals from the sensors 23 and 24 via the control device 22 and the peripheral elements 48, 48a, 48b, 48c remain in the corresponding radial positions.
  • the gear arranged in the housing 61 is designed for a relatively large reduction ratio, which can be, for example, greater than 500: 1. In the embodiment shown, the ratio between the drive shaft 58 and the output shaft 62 can be approximately 1000: 1.
  • the compressed air lines 30 and 31 can also be arranged in a line and, opposite to each other, directed against the passage channels 70 and 71, which are accordingly also arranged in a line on the housing part 55.
  • the compressed air line 30 can be attached directly to the housing of the thread stopper 18, while the compressed air line 31 is attached to a bracket 36b of the housing 36 opposite the thread stopper 18.
  • the compressed air lines 30 and 31 are each arranged at a radial distance from the circumferential elements 48a and 48c, which also allows the weft thread 3a to be pulled off undisturbed in the outermost position of the circumferential elements 48, 48a, 48c.
  • a single compressed air line 30 is provided, which on the holder 67 via, for example, electromagnetic actuating means, not shown, between the illustrated position assigned to the passage 70 and a position Passage channel 71 assigned position is adjustable, which corresponds to the position of the compressed air line 31 in Fig. 3.
  • the compressed air lines 30 and 31 are arranged on a fixed ring 75 which engages around the end of the winding body 8 and forms an annular gap therewith for braking the thread turns running off the winding body 8.
  • the ring 75 can be fastened to a carrier 76 on which the thread stopper 18 is adjustably attached radially to the longitudinal axis 10 of the bobbin 8 by means of a movable holder 77.
  • the holder 77 contains a cap-like guide part 78 which is connected to the thread stopper 18 and which is displaceably guided on the carrier 76 and is held by a compression spring 80 against one of the four circumferential elements 48 as shown.
  • magnets 81 and 82 are arranged with poles of the same name facing each other, so that a magnetic force counteracting the compression spring 80 is exerted on the guide part 78 carrying the thread stopper 18 .
  • the magnets 81, 82 and the compression spring 80 are dimensioned such that the thread stopper 18 is held at a distance from the circumferential element 48 and, following its radial adjustment movements, is adjustable between the inner position shown in full lines and an outer position 18 ′′ shown in broken lines Accordingly, a substantially constant distance can be maintained between the circumferential element 48 and the thread stopper 18 in each operating position, which allows the weft thread to be pulled off when the locking pin 20 is retracted and which at the same time enables the locking pin 20 to be securely inserted into a circumferential element 48 Allows slot 83 that itself as shown extends over part of the width of the peripheral element 48. Through the corresponding slot 83 of the circumferential element 48 adjacent to the compressed air lines 30 and 31, the passage openings 70 and 71 provided in the housing part 55 are accessible for the compressed air supply to the impeller 25.
  • the impeller can be designed in any other design than that shown and in any installation area of the housing section 15, e.g. near the holder 47, arranged and coupled to means provided in a known manner on the take-off end of the winding body for radial adjustment of the peripheral elements.
  • the weft thread store according to the invention is primarily intended for use on air jet weaving machines; use of a correspondingly designed weft thread store on looms of a different type, e.g. on projectile weaving machines or rapier weaving machines, however, nothing stands in the way.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP92810388A 1991-07-05 1992-05-22 Dispositif de stockage de fil de trame pour un métier à tisser Withdrawn EP0521819A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2005/91 1991-07-05
CH200591 1991-07-05

Publications (1)

Publication Number Publication Date
EP0521819A1 true EP0521819A1 (fr) 1993-01-07

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP92810388A Withdrawn EP0521819A1 (fr) 1991-07-05 1992-05-22 Dispositif de stockage de fil de trame pour un métier à tisser

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EP (1) EP0521819A1 (fr)
JP (1) JPH05186934A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106460262A (zh) * 2014-05-09 2017-02-22 必佳乐公司 输纬器装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0181985A1 (fr) * 1984-11-13 1986-05-28 GebràœDer Sulzer Aktiengesellschaft Dispositif de stockage de fil de trame pour métiers à tisser
EP0274987A2 (fr) * 1986-12-17 1988-07-20 GebràœDer Sulzer Aktiengesellschaft Tambour mesureur à fil réglable
EP0290380A1 (fr) * 1987-04-24 1988-11-09 GebràœDer Sulzer Aktiengesellschaft Dispositif de stockage de fil de trame avec mesureur de fil automatique pour métier à tisser
EP0344100A1 (fr) * 1988-05-20 1989-11-29 GebràœDer Sulzer Aktiengesellschaft Dispositif électromagnétique pour métiers à tisser

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0181985A1 (fr) * 1984-11-13 1986-05-28 GebràœDer Sulzer Aktiengesellschaft Dispositif de stockage de fil de trame pour métiers à tisser
EP0274987A2 (fr) * 1986-12-17 1988-07-20 GebràœDer Sulzer Aktiengesellschaft Tambour mesureur à fil réglable
EP0290380A1 (fr) * 1987-04-24 1988-11-09 GebràœDer Sulzer Aktiengesellschaft Dispositif de stockage de fil de trame avec mesureur de fil automatique pour métier à tisser
EP0344100A1 (fr) * 1988-05-20 1989-11-29 GebràœDer Sulzer Aktiengesellschaft Dispositif électromagnétique pour métiers à tisser

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106460262A (zh) * 2014-05-09 2017-02-22 必佳乐公司 输纬器装置
CN106460262B (zh) * 2014-05-09 2018-11-13 必佳乐公司 输纬器装置

Also Published As

Publication number Publication date
JPH05186934A (ja) 1993-07-27

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