EP0854946A1 - Mechanical loom with pneumatic weft thread insertion - Google Patents

Mechanical loom with pneumatic weft thread insertion

Info

Publication number
EP0854946A1
EP0854946A1 EP95932606A EP95932606A EP0854946A1 EP 0854946 A1 EP0854946 A1 EP 0854946A1 EP 95932606 A EP95932606 A EP 95932606A EP 95932606 A EP95932606 A EP 95932606A EP 0854946 A1 EP0854946 A1 EP 0854946A1
Authority
EP
European Patent Office
Prior art keywords
weft
thread
reed
clamp
scissors
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
EP95932606A
Other languages
German (de)
French (fr)
Other versions
EP0854946B1 (en
Inventor
Francisco Speich
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.)
Textilma AG
Original Assignee
Textilma 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 Textilma AG filed Critical Textilma AG
Publication of EP0854946A1 publication Critical patent/EP0854946A1/en
Application granted granted Critical
Publication of EP0854946B1 publication Critical patent/EP0854946B1/en
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
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3006—Construction of the nozzles
    • D03D47/302—Auxiliary nozzles
    • 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
    • D03D47/125—Weft holding devices
    • 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
    • D03D47/27—Drive or guide mechanisms for weft inserting
    • D03D47/277—Guide mechanisms
    • D03D47/278—Guide mechanisms for pneumatic looms
    • 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
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3006—Construction of the nozzles
    • D03D47/3013—Main nozzles
    • 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
    • D03D47/28—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed
    • D03D47/30—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein the weft itself is projected into the shed by gas jet
    • D03D47/3026—Air supply systems
    • D03D47/3033—Controlling the air supply
    • D03D47/3046—Weft yarn selection
    • 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
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/70—Devices for cutting weft threads

Definitions

  • the invention relates to a loom with pneumatic weft insertion.
  • Weft insertion is carried out either by means of a pivotable insertion device mounted on the reed or by means of a stationary entry device mounted on the machine frame.
  • the looms with swiveling insertion device have disadvantages.
  • the weft thread entered in each case is clamped and cut in the area of the reed stop, so that the setting of the blow nozzles in the entry position can only take place while the reed is being reset, which in particular restricts the number of blow nozzles and also requires special control.
  • the reciprocating movement of the reed provided with the insertion device generates relatively high inertial forces, which lead to undesirable vibrations of the moving system, and the weft threads are brought into uncontrolled vibrations as they are fed from the thread feeder into the blow nozzles, so that they cross and impose each other.
  • the invention has for its object to improve a weaving machine with pneumatic weft insertion so that the disadvantages mentioned do not occur.
  • FIG. 1 shows an embodiment of a weaving machine according to the invention with air intake in a schematic representation
  • FIG. 2 shows a sectional side view of the weft insertion area of the weaving machine
  • 3 shows a section along the line III-III in FIG. 2
  • FIG. 8 shows an embodiment of a control device for the blowing nozzles
  • FIG. 10 shows the section according to FIG. 9, which represents the situation when the weft thread is clamped
  • FIG. 11 shows the section according to FIG. 9, which represents the situation when the weft thread is cut and
  • FIG. 12 shows the section according to FIG. 9, which represents the situation with the blade stop.
  • the weaving machine in question contains a machine frame 1, a warp beam 2 from which warp threads 3, 4 are let down, a match beam 5, a shedding device 6, an arrangement 7 for inserting weft threads, a reed 8, a goods take-off 9 and a goods tree 10
  • the shedding device 6 forms An upper and lower compartment 11, 12 with warp threads 3, 4 via healds.
  • the arrangement 7 contains a pneumatic weft insertion device 14 and a pair of scissors 15, a thread clamp 16 and a blowing aid 17, which are arranged in the thread running direction between the insertion device 14 and the reed 8.
  • the entry device 14 is mounted on the machine frame 1.
  • the scissors 15 and the thread clamp 16 are coupled to the reed 8.
  • the blowing aid 17 is connected to the reed 8.
  • the insertion device 14 contains a support part 21, eight blow nozzles 22, a nozzle block 23, a holder 24 and an actuating device 25.
  • the support part 21 is fastened to the machine frame 1 by means of screws 26.
  • the blowing nozzles 22 are arranged in pairs and are operatively connected to a compressed air source and a weft thread store.
  • the blowing nozzles 22 are detachably mounted on one side in the nozzle block 23.
  • the holder 24 for the nozzle block is connected to the support part 21.
  • Actuating device 25 is connected to the shedding device 6 via a kinematic element 27 in order to place the blowing nozzles 22 in the firing position.
  • the nozzle block 23 and the holder 24 are designed in such a way that the mouth of the blowing nozzles can be pivoted about directions running at right angles to one another.
  • a spring 28 is provided which holds the kinematic organ 27 under tension.
  • a drive arrangement can be provided, which is controlled via a control device known per se, in order to set the blow nozzles in the entry position.
  • the reed 8 is mounted on a leaf bar 31.
  • a thread guide device 32 is attached to the sheet bar.
  • the guide device 32 contains an air supply part 33, which is mounted on the sheet bar, a plurality of lamellae 34, which are arranged in the manner of a comb and each have a recess 35, in order to determine a guide channel 36 and relay nozzles 37 to promote the registered weft thread 38 through the guide channel.
  • a so-called tunnel weave with relay nozzles can be used.
  • the blowing aid 17 is used with advantage in the weaving machine in question here.
  • the blowing aid is a plate-shaped body 41 with a conical penetration 42 and with an outlet slot 43.
  • the body 41 is fastened to the air guide part 33.
  • the thread clamp 16 has a clamping finger 45 and a clamping jaw 46, each of which is provided with a plate 47 for holding the weft thread.
  • the clamping finger is articulated on an axis 48 which is arranged on the machine frame 1.
  • the clamping jaw 46 is connected directly to the reed 7 and / or the sley.
  • a return spring 49 is provided for the clamping finger, which rests on the one hand on the machine frame 1 and on the other hand on the clamping finger.
  • a stop part 50 is mounted on the machine frame 1 in order to fix the position of the clamping finger (FIG. 5).
  • the scissors 15 have a stationary and a movable scissor blade 51, 52.
  • the stationary scissor blade 51 is on Machine frame 1 attached.
  • the movable scissor blade 52 is mounted on the reed 8 (Fig. 6).
  • FIG. 7 shows the assignment of the blow nozzles to the guide channel 36 determined by the lamellae 34.
  • An essential feature of the weaving machine is that the respective pair of blow nozzles is aligned essentially parallel to the center line of the guide channel 36 when the guide channel assumes the entry position .
  • the blowing nozzles 22 are adjusted by the actuating device 25 and the kinematic organ 27.
  • the blowing nozzle 12 can be arranged in a bundle shape.
  • the shedding device 6 comprises e.g. a jacquard device or a dobby, a color control device 56, a summing gear 57 and a one-armed lever 58 which is articulated on the machine frame 1.
  • a jacquard device or a dobby e.g. a jacquard device or a dobby
  • a color control device 56 e.g. a color control device 56
  • a summing gear 57 e.g. a summing gear 57
  • a one-armed lever 58 which is articulated on the machine frame 1.
  • Such summation gears and their function are known, so that a description thereof is omitted.
  • the kinematic element 27, which is connected to the actuating device 25, is fastened to the lever 58.
  • FIG 9 shows the situation during the insertion of a weft thread 38.
  • the blowing nozzle 22 is set in the insertion position.
  • the reed 8 is in the retracted position, the scissors 15 and the thread clamp 16 are in the open position and the weft thread is injected into the guide channel 36 of the thread guide device 32 by the blowing aid 17.
  • the reed 8 is pivoted in the direction of the stop position in accordance with the machine cycle and the inserted weft 38 is advanced through the reed 8. Because the clamping jaw 46 of the thread clamp 16 is connected to the reed 8, the clamping jaw 46 is pivoted against the clamping finger 45 and the weft thread 38 is clamped between the plates 47. The clamping finger 45 is subsequently pivoted by the clamping jaws 46 against the force of the spring 49, the weft thread 38 being held (FIG. 10).
  • the weft 38 is cut because the scissor blade 52 connected to the reed 8 is moved against the stationary scissor blade 51. This provides a new weft thread for entry. After cutting, the weft 38 is moved synchronously with the reed 8 by the thread clamp 16 (FIG. 11).
  • the reed 8 is then pivoted into the retracted position. With this pivoting movement, the clamping jaws 46 are pivoted with the reed. The clamping finger 45 follows the clamping jaw 46 due to the force of the spring 49 until it abuts the stop part 50. The clamping jaws 46 are moved further with the reed 8 and thus the thread clamp is opened for the subsequent weft insertion (FIG. 5).
  • the weft 38 is thus inserted into the guide channel 36 by the stationary weft insertion device 14 and held, cut and beaten during the pivoting of the reed 8.
  • This has a number of advantages. Due to the stationary insertion device, the supply of the weft from a weft feeder is safer and the period for adjusting the blowing nozzle in the insertion position is substantially extended, so that up to sixteen weft threads of different colors and types can be inserted.
  • the holding and the synchronous movement of the inserted weft thread with the reed up to the stop ensures that the weft thread is struck correctly, the protruding weft end sections being short and little waste occurring.

Landscapes

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

Abstract

The invention concerns a mechanical loom comprising a weaving reed (8) and a weft thread guide device (32) which are interconnected so as to pivot between an insertion position and a stop position. In order to insert the weft, there are provided a stationary weft-insertion device (14) with at least one blower nozzle (22) for inserting a weft thread (38) into the guide duct (36), as well as a thread clamp (16) and scissors (15). The thread clamp (16) is coupled with the weaving reed in order to clamp an inserted weft thread (38) and convey it synchronously with the guide duct (36) from the insertion position to the stop position. The scissors (15) are arranged downstream of the thread clamp (16) in the stop direction in order to cut off the weft thread immediately after it has been clamped. Since the insertion device is stationary and the thread clamp and scissors are operatively associated with the weaving reed, control of the loom is simplified such that up to sixteen different weft threads can be inserted.

Description

Webmaschine mit pneumatischer SchussfadeneintraσunσWeaving machine with pneumatic weft insertion
Die Erfindung betrifft eine Webmaschine mit pneumatischer Schussfadeneintragung.The invention relates to a loom with pneumatic weft insertion.
Aus dem Stand der Technik sind Webmaschinen mit pneumatischer Schusseintragung bekannt, wobei dieWeaving machines with pneumatic weft insertion are known from the prior art, the
Schusseintragung entweder mittels einer schwenkbaren, am Webblatt montierten Eintragvorrichtung oder mittels einer ortsfesten, am Maschinengestell montierten Eintragvorrichtung durchgeführt wird.Weft insertion is carried out either by means of a pivotable insertion device mounted on the reed or by means of a stationary entry device mounted on the machine frame.
Die Webmaschinen mit schwenkbarer Eintragvorrichtung weisen Nachteile auf. Der jeweils eingetragene Schussfaden wird im Bereich des Webblattanschlages geklemmt und geschnitten, so dass die Einstellung der Blasdüsen in die Eintragstellung nur während der Rückstellung des Webblattes erfolgen kann, was insbesondere die Anzahl von Blasdüsen einschränkt und zudem eine besondere Steuerung erforderlich macht. Durch die Hin- und Herbewegung des mit der Eintragvorrichtung versehenen Webblattes werden relativ hohe Massenkräfte erzeugt, welche zu unerwünschten Schwingungen des bewegten Systems führen und werden die Schussfäden beim Zuführen ab Fadenspeiser in die Blasdüsen in unkontrollierte Schwingungen versetzt, so dass sie verkreuzen und gegeneinander verhängen. Die Luftleitungen und die Betätigungsvorrichtung sind einer zu hohen mechanischen Belastung unterworfen, was insbesondere für die Betätigungsvorrichtung eine aufwendige Steuerung erforderlich macht. Aus diesen Nachteilen folgt aufgrund einer höheren Störanfälligkeit geringere Drehzahlen der Webmaschinen, was mit einem Produktivitätsverlust verbunden ist. Ferner erweist es sich als nachteilig, dass die Fadenklemme als auch die Schere am Maschinengestell montiert und über separate Antriebsmittel betätigt werden, was einen grosseren apparativen Aufwand zu Folge hat.The looms with swiveling insertion device have disadvantages. The weft thread entered in each case is clamped and cut in the area of the reed stop, so that the setting of the blow nozzles in the entry position can only take place while the reed is being reset, which in particular restricts the number of blow nozzles and also requires special control. The reciprocating movement of the reed provided with the insertion device generates relatively high inertial forces, which lead to undesirable vibrations of the moving system, and the weft threads are brought into uncontrolled vibrations as they are fed from the thread feeder into the blow nozzles, so that they cross and impose each other. The air lines and the actuator are too high subjected to mechanical stress, which requires a complex control, in particular for the actuating device. These disadvantages result in lower speeds of the weaving machines due to a higher susceptibility to faults, which is associated with a loss of productivity. Furthermore, it proves to be disadvantageous that the thread clamp as well as the scissors are mounted on the machine frame and actuated via separate drive means, which results in a greater outlay on equipment.
Der Erfindung liegt die Aufgabe zugrunde eine Webmaschine mit pneumatischer Schusseintragung so zu verbessern, dass die genannten Nachteile nicht auftreten.The invention has for its object to improve a weaving machine with pneumatic weft insertion so that the disadvantages mentioned do not occur.
Diese Aufgabe wird erfindungsgemäss mit einer Webmaschine gelöst, wie sie in den Ansprüchen gekennzeichnet ist.According to the invention, this object is achieved with a weaving machine as characterized in the claims.
Der mit der Erfindung erzielbare Vorteil ist im wesentlichen darin zu sehen, dass bis zu sechzehn Schussfäden unterschiedlicher Art sowie Farbe angewendet werden können.The advantage that can be achieved with the invention can essentially be seen in the fact that up to sixteen weft threads of different types and colors can be used.
Nachfolgend wird die Erfindung anhand der beiliegenden Zeichnungen erläutert.The invention is explained below with reference to the accompanying drawings.
Es zeigen:Show it:
Fig.l eine Ausführungsform einer erfindungsgemässen Webmaschine mit Lufteintrag in schematischer Darstellung,1 shows an embodiment of a weaving machine according to the invention with air intake in a schematic representation,
Fig.2 eine im Schnitt dargestellte Seitenansicht des Schusseintragbereiches der Webmaschine, Fig.3 einen Schnitt entlang der Linie III-III in Fig.2,2 shows a sectional side view of the weft insertion area of the weaving machine, 3 shows a section along the line III-III in FIG. 2,
Fig.4 einen Schnitt entlang der Linie IV-IV in Fig.2,4 shows a section along the line IV-IV in FIG. 2,
Fig.5 einen Schnitt entlang der Linie V-V in Fig.2,5 shows a section along the line V-V in Figure 2,
Fig.6 einen Schnitt entlang der Linie VI-VI in Fig.2,6 shows a section along the line VI-VI in FIG. 2,
Fig.7 einen Schnitt entlang der Linie VII-VII in Fig.2,7 shows a section along the line VII-VII in FIG. 2,
Fig.8 eine Ausführungsform einer Steuervorrichtung für die Blasdüsen,8 shows an embodiment of a control device for the blowing nozzles,
Fig.9 einen Schnitt entlang der Linie X-X in Fig.2, welcher die Situation beim Schussfadeneintrag darstellt,9 shows a section along the line X-X in FIG. 2, which represents the situation when the weft thread is inserted,
Fig.10 den Schnitt nach Fig.9, welcher die Situation bei der Klemmung des Schussfadens darstellt,10 shows the section according to FIG. 9, which represents the situation when the weft thread is clamped,
Fig.11 den Schnitt nach Fig.9, welcher die Situation beim Schnitt des Schussfadens darstellt und11 shows the section according to FIG. 9, which represents the situation when the weft thread is cut and
Fig.12 den Schnitt nach Fig 9, welcher die Situation beim Blattanschlag darstellt.12 shows the section according to FIG. 9, which represents the situation with the blade stop.
Die hier in Rede stehende Webmaschine enthält ein Maschinengestell 1, einen Kettbaum 2 von dem Kettfäden 3,4 abgelassen werden, einen Streichbaum 5, eine Fachbildevorrichtung 6, eine Anordnung 7 zum Eintragen von Schussfäden, ein Webblatt 8, einen Warenabzug 9 und einen Warenbaum 10. Die Fachbildevorrichtung 6 bildet über Weblitzen ein Ober- und Unterfach 11, 12 mit den Kettfäden 3,4.The weaving machine in question contains a machine frame 1, a warp beam 2 from which warp threads 3, 4 are let down, a match beam 5, a shedding device 6, an arrangement 7 for inserting weft threads, a reed 8, a goods take-off 9 and a goods tree 10 The shedding device 6 forms An upper and lower compartment 11, 12 with warp threads 3, 4 via healds.
Wie die Fig.2 zeigt enthält die Anordnung 7 eine pneumatische Schusseintragvorrichtung 14 sowie eine Schere 15, eine Fadenklemme 16 und eine Einblashilfe 17, die in Fadenlaufrichtung zwischen der Eintragvorrichtung 14 und dem Webblatt 8 angeordnet sind. Die Eintragvorrichtung 14 ist am Maschinengestell 1 montiert. Die Schere 15 und die Fadenklemme 16 sind mit dem Webblatt 8 gekoppelt. Die Einblashilfe 17 ist mit dem Webblatt 8 verbunden.As shown in FIG. 2, the arrangement 7 contains a pneumatic weft insertion device 14 and a pair of scissors 15, a thread clamp 16 and a blowing aid 17, which are arranged in the thread running direction between the insertion device 14 and the reed 8. The entry device 14 is mounted on the machine frame 1. The scissors 15 and the thread clamp 16 are coupled to the reed 8. The blowing aid 17 is connected to the reed 8.
Die Eintragvorrichtung 14 enthält einen Tragteil 21, acht Blasdüsen 22, einen Düsenblock 23, einen Halter 24 und eine Betätigungseinrichtung 25. Der Tragteil 21 ist mittels Schrauben 26 am Maschinengestell 1 befestigt. Die Blasdüsen 22 sind paarweise angeordnet und stehen mit einer Druckluftquelle und einem Schussfadenspeicher in Wirkverbindung. Die Blasdüsen 22 sind im Düsenblock 23 einseitig lösbar montiert. Der Halter 24 für den Düsenblock ist mit dem Tragteil 21 verbunden. DieThe insertion device 14 contains a support part 21, eight blow nozzles 22, a nozzle block 23, a holder 24 and an actuating device 25. The support part 21 is fastened to the machine frame 1 by means of screws 26. The blowing nozzles 22 are arranged in pairs and are operatively connected to a compressed air source and a weft thread store. The blowing nozzles 22 are detachably mounted on one side in the nozzle block 23. The holder 24 for the nozzle block is connected to the support part 21. The
Betätigungseinrichtung 25 ist über ein kinematisches Organ 27 mit der Fachbildevorrichtung 6 verbunden, um die Blasdüsen 22 in die Einschussstellung zu stellen. Hierzu der Düsenblock 23 und der Halter 24 so ausgestaltet, dass die Mündung der Blasdüsen um rechtwinklig zueinander verlaufende Richtungen schwenkbar sind. Es ist eine Feder 28 vorgesehen, welche das kinematische Organ 27 unter Spannung hält. Es wird darauf hingewiesen, dass anstelle der Betätigungseinrichtung 25 eine Antriebsanordnung vorgesehen werden kann, die über eine an sich bekannte Steuervorrichtung angesteuert wird, um die Blasdüsen in die Eintragstellung zu stellen. Wie die Fig.3 zeigt, ist das Webblatt 8 an einer Blattleiste 31 montiert. An der Blattleiste ist eine Fadenführungsvorrichtung 32 befestigt. Es ist von Vorteil, wenn die Führungsvorrichtung 32 einen Luftzuführungsteil 33, der an der Blattleiste montiert ist, eine Mehrzahl von Lamellen 34, die kammartig angeordnet und jeweils mit einer Ausnehmung 35 versehen sind, um einen Führungskanal 36 zu bestimmen und Stafettendüsen 37 enthält, um den eingetragenen Schussfadens 38 durch den Führungskanal zu fördern. Anstelle der Fadenführungsvorrichtung 32 kann ein sogenanntes Tunnelwebblatt mit Stafettendüsen angewendet werden.Actuating device 25 is connected to the shedding device 6 via a kinematic element 27 in order to place the blowing nozzles 22 in the firing position. For this purpose, the nozzle block 23 and the holder 24 are designed in such a way that the mouth of the blowing nozzles can be pivoted about directions running at right angles to one another. A spring 28 is provided which holds the kinematic organ 27 under tension. It is pointed out that instead of the actuating device 25, a drive arrangement can be provided, which is controlled via a control device known per se, in order to set the blow nozzles in the entry position. As FIG. 3 shows, the reed 8 is mounted on a leaf bar 31. A thread guide device 32 is attached to the sheet bar. It is advantageous if the guide device 32 contains an air supply part 33, which is mounted on the sheet bar, a plurality of lamellae 34, which are arranged in the manner of a comb and each have a recess 35, in order to determine a guide channel 36 and relay nozzles 37 to promote the registered weft thread 38 through the guide channel. Instead of the thread guiding device 32, a so-called tunnel weave with relay nozzles can be used.
Bei der hier in Rede stehenden Webmaschine wird die Einblashilfe 17 mit Vorteil angewendet. Die Einblashilfe ist ein plattenförmiger Körper 41 mit einer konischen Durchdringung 42 und mit einem Auslassschlitz 43. Der Körper 41 ist an dem Luftführungsteil 33 befestigt. Es ist aber möglich die erste Lamelle 34 als Einblashilfe auszubilden (Fig.4).The blowing aid 17 is used with advantage in the weaving machine in question here. The blowing aid is a plate-shaped body 41 with a conical penetration 42 and with an outlet slot 43. The body 41 is fastened to the air guide part 33. However, it is possible to design the first lamella 34 as a blowing aid (FIG. 4).
Die Fadenklemme 16 weist einen Klemmfinger 45 und einen Klemmbacken 46 auf, die jeweils mit einer Platte 47 zum Halten des Schussfadens versehen sind. Der Klemmfinger ist an einer Achse 48 angelenkt, die am Maschinengestell 1 angeordnet ist. Der Klemmbacken 46 ist direkt mit dem Webblatt 7 und/oder der Weblade verbunden. Ferner ist eine Rückstellfeder 49 für den Klemmfinger vorgesehen, die einerseits an dem Maschinengestell 1 und andererseits am Klemmfinger anliegt. Am Maschinengestell 1 ist ein Anschlagteil 50 montiert, um die Position des Klemmfingers festzulegen (Fig.5).The thread clamp 16 has a clamping finger 45 and a clamping jaw 46, each of which is provided with a plate 47 for holding the weft thread. The clamping finger is articulated on an axis 48 which is arranged on the machine frame 1. The clamping jaw 46 is connected directly to the reed 7 and / or the sley. Furthermore, a return spring 49 is provided for the clamping finger, which rests on the one hand on the machine frame 1 and on the other hand on the clamping finger. A stop part 50 is mounted on the machine frame 1 in order to fix the position of the clamping finger (FIG. 5).
Die Schere 15 hat ein ortsfestes und ein bewegliches Scherenblatt 51,52. Das ortsfeste Scherenblatt 51 ist am Maschinengestell 1 befestigt. Das bewegliche Scherenblatt 52 ist am Webblatt 8 montiert (Fig.6).The scissors 15 have a stationary and a movable scissor blade 51, 52. The stationary scissor blade 51 is on Machine frame 1 attached. The movable scissor blade 52 is mounted on the reed 8 (Fig. 6).
Die Fig.7 zeigt die Zuordnung der Blasdüsen zu dem durch die Lamellen 34 bestimmten Führungskanal 36. Ein wesentliches Merkmal der Webmaschine besteht darin, dass das jeweilige Paar von Blasdüsen im wesentlichen parallel zur Mittellinie des Führungskanals 36 ausgerichtet ist, wenn der Führungskanal die Eintragstellung einnimmt. Die Einstellung der Blasdüsen 22 erfolgt durch die Betätigungseinrichtung 25 und das kinematische Organ 27. Alternativ dazu können die Blasdüse 12 bündeiförmig angeordnet werden.7 shows the assignment of the blow nozzles to the guide channel 36 determined by the lamellae 34. An essential feature of the weaving machine is that the respective pair of blow nozzles is aligned essentially parallel to the center line of the guide channel 36 when the guide channel assumes the entry position . The blowing nozzles 22 are adjusted by the actuating device 25 and the kinematic organ 27. Alternatively, the blowing nozzle 12 can be arranged in a bundle shape.
Wie die Fig.8 zeigt umfasst die Fachbildevorrichtung 6, z.B. eine Jaquardvorrichtung oder Schaftmaschine, eine Farbsteuervorrichtung 56, ein Summiergetriebe 57 und einen einarmigen Hebel 58, der am Maschinengestell 1 angelenkt ist. Derartige Summiergetriebe und ihre Funktion sind bekannt, so dass auf eine Beschreibung derselben verzichtet wird. An dem Hebel 58 ist das kinematische Organ 27 befestigt, das mit der Betätigungεeinrichtung 25 verbunden ist.As FIG. 8 shows, the shedding device 6 comprises e.g. a jacquard device or a dobby, a color control device 56, a summing gear 57 and a one-armed lever 58 which is articulated on the machine frame 1. Such summation gears and their function are known, so that a description thereof is omitted. The kinematic element 27, which is connected to the actuating device 25, is fastened to the lever 58.
Nachfolgend wird der Eintragvorgang anhand der Fig. 9 bis 12 beschrieben. Bei Webmaschinen wird pro Umdrehung der Hauptantriebswelle der Webmaschine ein Schussfaden eingetragen und angeschlagen. Aus diesem Maschinentakt wird die Steuerung der einzelnen Elemente der Webmaschine abgeleitet. Bei der vorstehend beschriebenen Webmaschine wird generell der Antrieb des Webblattes 8 und bezogen auf den Schusseintrag lediglich die Einstellung der Blasdüse 22 auf die Einschussstellung und die Eintragung des Schussfadens 38 in Abhängigkeit des Drehwinkels der Hauptwelle angesteuert, während der Zeitpunkt der Klemmung und Abtrennung des Schussfadens 38 durch die ausführungs- bzw. funktionsmässige Zuordnung der Schere und der Fadenklemme zum Webblatt 8 bestimmt wird. Dies hat insbesondere den Vorteil, dass die Steuerung vereinfacht wird.The entry process is described below with reference to FIGS. 9 to 12. In the case of weaving machines, one weft thread is inserted and cast on each revolution of the main drive shaft of the weaving machine. The control of the individual elements of the weaving machine is derived from this machine cycle. In the loom described above, the drive of the reed 8 and, in relation to the weft insertion, only the setting of the blowing nozzle 22 to the weft position and the insertion of the weft thread 38 are controlled as a function of the angle of rotation of the main shaft, while the moment of clamping and separation of the weft thread 38 through the design or functional assignment of the scissors and the thread clamp to the reed 8 is determined. This has the particular advantage that the control is simplified.
Die Fig.9 zeigt die Situation während der Eintragung eines Schussfadens 38. Die Blasdüse 22 ist in die Eintragstellung gestellt. Das Webblatt 8 steht in der zurückgezogenen Stellung, die Schere 15 und die Fadenklemme 16 sind in der geöffneten Stellung und der Schussfaden ist durch die Einblashilfe 17 in den Führungskanal 36 der Fadenführungsvorrichtung 32 eingeschossen.9 shows the situation during the insertion of a weft thread 38. The blowing nozzle 22 is set in the insertion position. The reed 8 is in the retracted position, the scissors 15 and the thread clamp 16 are in the open position and the weft thread is injected into the guide channel 36 of the thread guide device 32 by the blowing aid 17.
Nach dem der Schussfaden 38 in den Führungskanal 36 eingetragen ist, wird gemäss dem Maschinentakt das Webblatt 8 in Richtung zur Anschlagstellung geschwenkt und der eingetragene Schussfaden 38 durch das Webblatt 8 vorgeschoben. Weil der Klemmbacken 46 der Fadenklemme 16 mit dem Webblatt 8 verbunden ist, wird der Klemmbacken 46 gegen den Klemmfinger 45 geschwenkt und der Schussfaden 38 zwischen den Platten 47 eingeklemmt. Der Klemmfinger 45 wird in der Folge durch den Klemmbacken 46 gegen die Kraft der Feder 49 verschwenkt, wobei der Schussfaden 38 gehalten wird (Fig. 10) .After the weft 38 has been inserted into the guide channel 36, the reed 8 is pivoted in the direction of the stop position in accordance with the machine cycle and the inserted weft 38 is advanced through the reed 8. Because the clamping jaw 46 of the thread clamp 16 is connected to the reed 8, the clamping jaw 46 is pivoted against the clamping finger 45 and the weft thread 38 is clamped between the plates 47. The clamping finger 45 is subsequently pivoted by the clamping jaws 46 against the force of the spring 49, the weft thread 38 being held (FIG. 10).
Nach der Klemmung wird der Schussfaden 38 geschnitten, weil das mit dem Webblatt 8 verbundene Scherenblatt 52 gegen das ortsfeste Scherenblatt 51 bewegt wird. Dadurch wird ein neuer Schussfaden zum Eintragen bereitgestellt. Nach dem Schneiden wird der Schussfaden 38 durch die Fadenklemme 16 synchron mit dem Webblatt 8 bewegt (Fig.11).After clamping, the weft 38 is cut because the scissor blade 52 connected to the reed 8 is moved against the stationary scissor blade 51. This provides a new weft thread for entry. After cutting, the weft 38 is moved synchronously with the reed 8 by the thread clamp 16 (FIG. 11).
Danach erreicht das Weblatt 8 die Anschlagstellung, wobei der Schussfaden 38 durch das Webblatt 8 an den vorgängig angeschlagenen und bereits durch den Wechsel der Kettfäden abgebundenen Schussfaden angeschlagen und unmittelbar danach aus der Fadenklemme 16 herausgezogen wird (Fig.12) .Thereafter, the reed 8 reaches the stop position, with the weft 38 going through the reed 8 to the previous one The weft thread that has been knocked on and already tied off by changing the warp threads is pulled out and immediately pulled out of the thread clamp 16 (FIG. 12).
Anschliessend wird das Webblatt 8 in die zurückgezogene Stellung geschwenkt. Mit dieser Schwenkbewegung wird der Klemmbacken 46 mit dem Webblatt verschwenkt. Der Klemmfinger 45 folgt dem Klemmbacken 46 aufgrund der Kraftwirkung der Feder 49 bis dieser an den Anschlagteil 50 anliegt. Der Klemmbacken 46 wird mit dem Webblatt 8 weiterbewegt und somit die Fadenklemme für den nachfolgenden Schussfadeneintrag geöffnet (Fig.5) .The reed 8 is then pivoted into the retracted position. With this pivoting movement, the clamping jaws 46 are pivoted with the reed. The clamping finger 45 follows the clamping jaw 46 due to the force of the spring 49 until it abuts the stop part 50. The clamping jaws 46 are moved further with the reed 8 and thus the thread clamp is opened for the subsequent weft insertion (FIG. 5).
Bei der vorstehend beschriebenen Webmaschine wird also der Schussfaden 38 durch die ortsfeste Schusseintragvorrichtung 14 in den Führungskanal 36 eingetragen und während der Schwenkung des Webblattes 8 gehalten, geschnitten und angeschlagen. Daraus ergeben sich eine Reihe von Vorteilen. Durch die ortsfeste Eintragvorrichtung wird die Zufuhr des Schussfadens aus einem Schussfadenspeiser sicherer und der Zeitraum zur Einstellung der Blasdüse in die Eintragstellung wesentlich erstreckt, so dass bis zu sechzehn Schussfäden unterschiedlicher Farbe sowie Art eingetragen werden. Durch das Halten und die synchrone Bewegung des eingetragenen Schussfadens mit dem Webblatt bis zum Anschlag wird ein einwandfreies Anschlagen des Schussfadens gewährleistet, wobei die überstehenden Schussfadenendabschnitte kurz sind und wenig Abfall anfällt. In the loom described above, the weft 38 is thus inserted into the guide channel 36 by the stationary weft insertion device 14 and held, cut and beaten during the pivoting of the reed 8. This has a number of advantages. Due to the stationary insertion device, the supply of the weft from a weft feeder is safer and the period for adjusting the blowing nozzle in the insertion position is substantially extended, so that up to sixteen weft threads of different colors and types can be inserted. The holding and the synchronous movement of the inserted weft thread with the reed up to the stop ensures that the weft thread is struck correctly, the protruding weft end sections being short and little waste occurring.

Claims

Patentansprüche claims
1. Webmaschine mit pneumatischer Schusseintragung, wobei die Webmaschine ein Webblatt (8) und eine Schussfadenführungseinrichtung (32) , die miteinander verbunden zwischen einer Eintragstellung und einer Anschlagstellung schwenkbar sind sowie eine ortsfest angeordnete Schusseintragvorrichtung (14) mit mindestens einer Blasdüse (22) zum Eintragen eines Sσhussfadens (38) in den Führungskanal (36) . eine1. Weaving machine with pneumatic weft insertion, the loom comprising a reed (8) and a weft thread guiding device (32) which can be pivoted together between an insertion position and a stop position, and a stationary weft insertion device (14) with at least one blowing nozzle (22) for insertion a weft thread (38) in the guide channel (36). a
Fadenklemme (16) und eine Schere (15) aufweist, wobei die Fadenklemme mit dem Webblatt gekoppelt ist, um einen eingetragenen Schussfaden (38) zu klemmen und synchron mit dem Führungskanal (36) von der Eintragstelle bis zur Anschlagstelle zu fördern und wobei die Schere (15) in Anschlagrichtung des Webblattes der Fadenklemme (16) nachgeordnet ist, um den Schussfaden nach der Klemmung abzuschneiden.Thread clamp (16) and a pair of scissors (15), the thread clamp being coupled to the reed in order to clamp an inserted weft thread (38) and to convey it synchronously with the guide channel (36) from the entry point to the stop point, and wherein the scissors (15) downstream of the thread clamp (16) in the stop direction of the reed in order to cut off the weft thread after clamping.
2. Webmaschine nach Anspruch 1 wobei auf der Schusseite zwischen der Mündung der Blasdüse (22) und dem2. Loom according to claim 1, wherein on the weft side between the mouth of the blowing nozzle (22) and the
Führungskanal (36) die Schere (15) , die Fadenklemme (16) und ein Einblasführungsteil (17) in Fadenlaufrichtung hintereinanderliegend angeordnet sind.Guide channel (36), the scissors (15), the thread clamp (16) and an injection guide part (17) are arranged one behind the other in the thread running direction.
3. Webmaschine nach einem der Ansprüche 1 oder 2, wobei die Eintragvorrichtung (14) am Maschinengestell (1) montiert ist.3. Loom according to one of claims 1 or 2, wherein the entry device (14) is mounted on the machine frame (1).
4. Webmaschine nach einem der Ansprüche 1 bis 3, wobei eine Betätigungseinrichtung (25) vorgesehen ist, um die Blasdüse (22) gemäss einem Webmusterprogramm in die Einschussposition zu stellen. 4. Weaving machine according to one of claims 1 to 3, wherein an actuating device (25) is provided in order to position the blowing nozzle (22) according to a weaving pattern program in the weft position.
5. Webmaschine nach einem der Ansprüche 1 bis 4, wobei die Eintragvorrichtung (14) eine Mehrzahl von Blasdüsen (22) aufweist.5. Loom according to one of claims 1 to 4, wherein the insertion device (14) has a plurality of blowing nozzles (22).
6. Webmaschine nach Anspruch 5, wobei die Blasdüsen (22) auf und ab bewegbar und/oder um rechtwinklig kreuzende Achsen schwenkbar sind.6. Weaving machine according to claim 5, wherein the blowing nozzles (22) are movable up and down and / or can be pivoted about axes crossing at right angles.
7. Webmaschine nach Anspruch 5 oder 6, wobei die Blasdüse (22) paarweise und übereinanderliegend oder bündeiförmig angeordnet sind.7. Loom according to claim 5 or 6, wherein the blowing nozzle (22) are arranged in pairs and one above the other or bundle-shaped.
8. Webmaschine nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Fadenklemme (16) einen Klemmfinger (45) , der schwenkbar ist und einen Klemmbacken (46) aufweist, der mit dem Webblatt (8) verbunden ist.8. Loom according to one of claims 1 or 2, characterized in that the thread clamp (16) has a clamping finger (45) which is pivotable and has a clamping jaw (46) which is connected to the reed (8).
9. Webmaschine nach Anspruch 8, dadurch gekennzeichnet, dass der Klemmfinger (45) ein um eine ortsfeste Achse (48) schwenkbarer Körper oder ein um eine Biegeachse schwenkbares Element ist9. Loom according to claim 8, characterized in that the clamping finger (45) is a body which can be pivoted about a fixed axis (48) or an element which can be pivoted about a bending axis
10. Webmaschine nach Anspruch 8, gekennzeichnet durch eine Stellfeder (49) , um den Klemmfinger in die Schusseintragstellung zu stellen und um die Haltekraft für den Schussfaden bei der Schwenkung zu erzeugen und durch einen Anschlagteil (50) , um den Klemmfinger in der Schusseintragstellung zu halten.10. Loom according to claim 8, characterized by an adjusting spring (49) to put the clamping finger in the weft insertion position and to generate the holding force for the weft thread when pivoting and by a stop member (50) to the clamping finger in the weft insertion position hold.
11. Webmaschine nach einem der Ansprüche 1 oder 2, wobei die Schere (15) eine ortsfest angeordnete Klinge (51) und eine bewegliche Klinge (52) aufweist und wobei die bewegliche Klinge mit dem Webblatt oder einer Antriebseinrichtung gekoppelt ist. 11. Loom according to one of claims 1 or 2, wherein the scissors (15) has a fixedly arranged blade (51) and a movable blade (52) and wherein the movable blade is coupled to the reed or a drive device.
12. Webmaschine nach Anspruch 2, wobei der Einblasführungsteil (17) ortsfest angeordnet oder mit dem Webblatt (8) verbunden ist.12. Weaving machine according to claim 2, wherein the blow-in guide part (17) is arranged in a fixed position or is connected to the reed (8).
13. Webmaschine nach Anspruch 12, wobei der Einblasführungsteil (17) eine konische Durchdringung (42) , die mit der grössten Weite der Mündung der Blasdüse (22) zugewandt ist und einen Auslassschlitz (43) für den Schussfaden 38) aufweist. 13. Weaving machine according to claim 12, wherein the blow-in guide part (17) has a conical penetration (42) which faces the greatest width of the mouth of the blow nozzle (22) and has an outlet slot (43) for the weft thread 38).
EP95932606A 1995-10-10 1995-10-10 Mechanical loom with pneumatic weft thread insertion Expired - Lifetime EP0854946B1 (en)

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PCT/CH1995/000230 WO1997013901A1 (en) 1995-10-10 1995-10-10 Mechanical loom with pneumatic weft thread insertion

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JP (1) JPH11513445A (en)
KR (1) KR100405631B1 (en)
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DE59509248D1 (en) 2001-06-13
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JPH11513445A (en) 1999-11-16
TW299369B (en) 1997-03-01
CZ287374B6 (en) 2000-11-15
KR19990064131A (en) 1999-07-26
CA2234464C (en) 2004-09-14
US6014992A (en) 2000-01-18
KR100405631B1 (en) 2004-03-20
ES2157343T3 (en) 2001-08-16
CA2234464A1 (en) 1997-04-17
EP0854946B1 (en) 2001-05-09
BR9510658A (en) 1999-01-05
WO1997013901A1 (en) 1997-04-17

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