EP0621359A1 - Dispositif pour l'enfilage automatique d'un fil de trame dans un oeillet - Google Patents

Dispositif pour l'enfilage automatique d'un fil de trame dans un oeillet Download PDF

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Publication number
EP0621359A1
EP0621359A1 EP93810279A EP93810279A EP0621359A1 EP 0621359 A1 EP0621359 A1 EP 0621359A1 EP 93810279 A EP93810279 A EP 93810279A EP 93810279 A EP93810279 A EP 93810279A EP 0621359 A1 EP0621359 A1 EP 0621359A1
Authority
EP
European Patent Office
Prior art keywords
thread
guide channel
weft
eyelet
thread guide
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Withdrawn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
EP93810279A
Other languages
German (de)
English (en)
Inventor
Tonny Raaijmakers
Werner Degen
Hanspeter Bolt
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
Priority to EP93810279A priority Critical patent/EP0621359A1/fr
Publication of EP0621359A1 publication Critical patent/EP0621359A1/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Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to a device for automatically threading a weft thread into an eyelet according to the preamble of claim 1.
  • the invention further relates to a method for operating a device according to the invention.
  • the invention further relates to projectile and rapier weaving machines with a device according to the invention.
  • a guide channel composed of tubular pieces has at least one point at which the tubular pieces are spaced apart from one another in the direction of thread travel. This transverse to the guide channel gap allows functional organs - such as.
  • the length of the guide channel has a continuous slot, such that a weft thread threaded into the eyelet is pulled through the slot of the guide channel during a pivoting movement of the thread tensioner and thus comes to lie completely outside the guide channel.
  • the eyelet of the thread tensioner must be pivoted into the guide channel by hand. As soon as the eyelet An air valve is actuated and a weft thread is blown through the guide channel and the eyelet provided.
  • a disadvantage of this known device is that the eyelet has to be precisely positioned by hand in the guide channel in order to then automatically pull in the weft thread by actuating fluid nozzles and thread it into the eyelet.
  • Another disadvantage is that the position of the guide channel is fixed and unchangeable. This limits both the freedom of movement of the thread deflecting element and of the weft thread.
  • Another disadvantage is that an associated guide channel is required for each weft thread.
  • the object of the invention is to remedy these disadvantages.
  • this object is achieved according to the characterizing features of claim 1.
  • the subclaims relate to further advantageous embodiments of the device according to the invention.
  • the object is further achieved with a method according to the characterizing features of claim 11.
  • An advantage of the invention is that the guide channel is brought into a threading position by a drive device and is removed again after threading, so that the guide channel does not restrict the freedom of movement of a thread deflecting element during weaving. It is also advantageous that the mutual position between the guide channel and an eyelet is adapted so that a weft thread can be threaded into the eyelet safely and without manual assistance. It is also advantageous that a single guide channel is sufficient to thread a plurality of eyelets.
  • a thread guide and support device 2 which consists of a thread guide channel 2a and an alignment area 2c.
  • the thread guide channel 2a has an inlet opening 2k, an outlet opening 2e and a slot 2d running in the running direction 2g of the weft thread 3a.
  • a thread deflecting element 4a with an eyelet 5a lies against the stop surface 2f of the alignment area 2c.
  • the eyelet 5a thus presented in a threading position is flowed through by the fluid flowing out of the thread guide channel 2a, so that the thread tip of a weft thread 3a conveyed through the thread guide channel 2a is carried through the eyelet 5a and the weft thread 3a is thus threaded into the thread deflection element 4a.
  • a fluid nozzle 13b feeds the thread guide channel 2a with a fluid.
  • the outflowing fluid from a further fluid nozzle 13c guides the weft 3a after threading in a certain direction.
  • the fluid nozzles 13b, 13c can be fastened to the thread guide and support device 2, for example.
  • a so-called color selector 26 of a rapier weaving machine is shown in FIG. 1b.
  • the color selector 26 has the task of transferring the weft thread 3a, 3b, 3c, 3d to be inserted into the gripper 12 via the thread deflection elements 4a, 4b, 4c, 4d.
  • the color selector 26 also consists of a drive device 15 and force transmission means 16a, 17a for driving the thread deflecting elements 4a-4d.
  • the thread deflecting element 4a is shown in a basic position 4a ', in a threading position 4a''' and in a thread transfer position 4a ''.
  • the feed element 7 of the thread guide and support device 2 is brought from a basic position 7b into a threading position 7a.
  • a drive device acts on the feed element 7 via force transmission means 14.
  • the thread guide and support device 2, which is connected to the feed element 7 via spring means 6, is thus brought into a threading position.
  • the thread deflecting element 4a is then brought from its basic position 4a 'into the threading position 4a''', so that the thread deflecting element 4a comes to rest on the stop surface 2f and exerts a force on it, so that the mutual position of the thread deflecting element 4a and thread guiding device 2 mutually is adjusted because the Thread guide device 2 and possibly also the thread deflecting element 4a are resiliently mounted.
  • the eyelet 5a comes to lie in a defined position with respect to the outlet opening 2e of the thread guide channel 2a.
  • the fabric 11c and the shed 11 with the upper shed 11b and the lower shed 11a are shown, which is shown in front of the color selector 26.
  • the thread deflection element 4a can usually be positioned in any position between the two extreme positions basic position 4a 'and thread transfer position 4a' ', e.g. in the threading position 4a '' 'shown.
  • the respective threading position 4a '' 'must therefore lie between the operational reversal positions of the thread deflecting element 4a. It proves to be advantageous to choose the threading position 4a '' 'in the vicinity of the thread transfer position 4a' ', since all thread deflecting elements 4a to 4d with eyes 5a to 5d in the thread transfer position 4a' 'are oriented very similarly.
  • the individual thread deflection elements 4a to 4d can be aligned differently with eyelets 5a - 5d.
  • FIG. 1c shows the threading process shown in FIG. 1b from a top view.
  • the feed element 7 with thread guide and support device 2 and the thread deflection element 4a are brought into the threading position.
  • Two fluid nozzles 13b, 13c are attached to the thread guide and support device 2 in order to convey the weft thread 3a in the corresponding direction during the threading process.
  • a fluid nozzle 13a, 13d, 13e, 13f is firmly anchored on a base support, each fluid nozzle pointing in the direction of the inlet opening 2k of the thread guide channel 2a.
  • the direction of the inlet opening 2k refers to the thread guide and Support device 2 in threading position.
  • the weft thread 3a to be threaded is thus initially conveyed by the fluid nozzle 13a in the direction of the inlet opening 2k, then by the fluid nozzle 13b into the inlet opening 2k, through the thread guide channel 2a and the provided eyelet 5a of the thread deflecting element 4a, and then in one with the fluid nozzle 13c Funnel 23 promoted. From the funnel 23, the weft thread 3a reaches a thread clamping or thread cutting device 19, where the thread is held. After the weft thread 3a has been threaded in, the thread guide and support device 2 is initially moved back into the basic position 7b by the feed member 7.
  • the weft thread 3a held by the eyelet 5a is pulled through the slot 2d of the thread guide channel 2a moving transversely to the running direction 2g.
  • the thread deflecting element 4a can, for example, bring it into a basic position 4a 'or into a threading position 4a'''.
  • the slot 2d is arranged such that the weft thread 3a is conveyed out of the thread guide channel 2a by a movement of the thread guide and support device 2.
  • the slot 2d could be arranged in the thread guide and support device 2 in such a way that in the thread guide and loader device 2 which is initially at rest, the thread deflecting element 4a is moved away, and the weft thread 3a, following the movement of the eyelet 5a, through the slot 2d is pulled out of the thread guide channel 2a.
  • a weft thread 3a held in the thread clamping or thread cutting device 19 is presented by the thread deflecting element 4a to the gripper 12 entering, the weft thread 3a is cut by the thread cutting device 18 and inserted by the gripper 12 into the open shed 11. The piece of thread remaining in the funnel 23 is then suctioned off.
  • thread deflection elements 4a to 4d can be threaded in succession with eyelets 5a to 5d. 1c, the positions are shown in dashed lines which the thread deflection elements 4b, 4e, 4d would assume in the threading position with respect to the alignment area 2c.
  • FIG. 2a shows a further exemplary embodiment of a device for automatically threading a weft thread 3a into an eyelet 5a.
  • Four weft threads 3a-3d are fed via thread guide channels 20a-20d to the thread deflection elements 4a-4d with eyelets 5a-5d, and lead further into the thread guide channels 21a-21d.
  • the arrangement shown serves, for example, as a thread tensioner in projectile weaving machines.
  • a thread deflection element 4a is raised in such a way that no thread deflection occurs between opposite thread guide channels 20a and 21a.
  • the inserted weft 3a is stretched by the thread deflecting element 4a moving downward into the position shown in dashed lines and thereby exerting a tensile force on the weft 3a.
  • the thread deflecting elements 4a-4d are articulated on an axis of rotation 9 and, as shown on the thread deflecting element 4d, can be held under prestress with a spring element 6 which is fastened to a frame.
  • the position of the individual thread deflection elements 4a-4d is determined by eccentric cam disks 10 which are fastened on a drive axis and are driven by a drive device 8.
  • a feedable thread guide channel 2a, 2b is used to thread the weft thread 3a into the eyelet 5a.
  • the thread guide channel consists of two V-shaped thread guide channels 2a, 2b, such that between the two Thread guide channels 2a, 2b there is a gap between which the eyelet 5a of the thread deflecting element 4a can be inserted.
  • the thread guiding channel 2a, 2b held via a feed element 7 is in a basic position 7b.
  • the thread guide channel 2a, 2b In order to thread a weft thread 3a-3d into an eyelet 5a-5d, for example after a weft thread breakage, the thread guide channel 2a, 2b is moved in the direction of movement 7c by the drive device 8 and brought into a threading position 7a in accordance with the thread 3a-3d to be threaded. In the threading position 7a, the thread guide channel 2a, 2b connects two opposite pairs of thread guide channels, such as 20a with 21a or 20b with 21b.
  • the thread guide channel 2a, 2b and the eyelet 5a are positioned in a threading position such that the eyelet 5a comes to lie in the fluid flow of the thread guide channel 2a, 2b.
  • the weft thread 3a is then fed with a fluid through the thread guide channel 20a.
  • the tip of the weft thread 3a is conveyed via the thread guide channel 2a, through the eyelet 5a and the thread guide channel 2b to the thread guide channel 21a and further fed to the weft insertion member.
  • the thread guide channel 2a, 2b is then conveyed back into the basic position 7b by the drive device 8 in the direction of movement 7c, the weft thread 3a emerging from the thread guide channel 2a, 2b through the slots 2d running in the longitudinal direction of the thread guide channel 2a, 2b.
  • a weft thread 3a which runs through the eyelet 5a and otherwise runs freely between the guide channel 20a and the guide channel 21a, can of course also be brought back into the thread guide channel.
  • the eyelet 5a is brought into the threading position and then the thread guide channel 2a, 2b is moved from the basic position 7b into the threading position 7a by the drive device 8 in the direction of movement 7c.
  • the slots 2d approach the weft thread 3a; the thread guide channel 2a, 2b is pushed further over the weft thread 3a, so that the weft thread 3a comes to lie within the thread guide channel 2a, 2b, passing through the slots 2d.
  • the advantage that the weft thread 3a comes to rest again in the thread guide channel 2a, 2b can be seen in the fact that the weft thread 3a can be conveyed better in the weft insertion direction, in particular if the thread guide channel 2a, 2b still has auxiliary nozzles 24a, 24b.
  • FIG. 2b the thread run is schematically shown with a threading device 39 according to the invention on a projectile weaving machine.
  • a threading device 39 By means of an injector 31 at the entrance to a weft thread store 32, which has a compressed air connection 33, the weft thread 3a is brought through a winding tube 34 into the winding area of a storage drum 35. From there, the weft 3a can be fed through a curved guide tube 34a to a further injector nozzle 36, from which the weft 3a is sucked in when a fluid is supplied through a line 37.
  • the weft thread 3a reaches the threading device 39 via a thread brake.
  • a fluid is supplied to the injector nozzle 41 via the line 40.
  • the weft thread 2a follows the thread guide channel 2a, is carried by the provided eyelet 5a and continues to follow the thread guide channel 2b to the next injector nozzle 42 with fluid line 43 Weft 3a the shed 11 and thus guided in the vicinity of the projectile 45.
  • the device which feeds the weft thread 3a to the projectile 45 and fastens it is not shown.
  • the threading device 39 according to the invention thus makes it possible to pull the weft thread 3a fully automatically into a projectile weaving machine.
  • FIG. 2c shows a detail for the mutual positioning of guide channel 2a and eyelet 5a of a threading device 39.
  • the guide channel 2a is fed from its withdrawn basic position 7b in the direction of movement 7c to the thread deflection element 4a.
  • the outlet opening 2e of the thread guide channel 2a must be aligned with the eyelet 5a, so that the weft thread to be inserted passes the eyelet 5a unhindered.
  • a distance sensor 22 is attached to the feed element 7 and detects the distance to the thread deflecting element 4a.
  • the thread guide channel 2a, 2b and the thread deflection elements 4a-4d can be spring-mounted.
  • 2d shows a thread deflection element 4a which is too high with respect to the outlet opening 2e of the thread guide channel 2a. As shown in FIG. 2a, this is achieved by a corresponding position of the cam 10.
  • the thread deflecting element 4a can be deflected downward, the tension spring 6 generating a corresponding counterforce.
  • Attached to the thread guide channel 2a is an alignment element 2c which moves in the direction of movement 7c over the thread deflecting element 4a and, from a certain position, comes into contact with the thread deflecting element 4a via the support area 2h and presses it downward.
  • the alignment element 2c thus ensures that the eyelet 5a and the outlet opening 2e of the Thread guide channel 2a are positioned mutually.
  • 2e shows a further exemplary embodiment for the mutual positioning of the eyelet 5a with the outlet opening 2e of the thread guide channel 2a.
  • the eyelet 5a is placed too deep, the thread deflecting element 4a having a downward spring force F, so that the eyelet 5a is raised in the direction of movement 7c over the support area 2h during the retraction of the thread guide channel 2a and thus in an advantageous position of the outlet opening 2e is presented.
  • FIG. 2f shows a further exemplary embodiment of a thread guiding and aligning device 2.
  • An alignment element 2c is arranged between the two thread guide channels 2a, 2b, which is firmly connected to the thread guide channels 2a, 2b and forms the thread guide and support device 2 together with the thread guide channels 2a, 2b.
  • the thread guide and support device 2 is connected to the feed element 7 and can be positioned in a threading position 7a in the direction of movement 7c via the feed element 7 and the drive device 8.
  • the thread deflecting element 4a can already be in an approximate threading position beforehand.
  • the aligning element 2c and the thread deflecting element 4a touch and the aligning element 2c slides in the area of the eyelet 5a over the thread deflecting element 4a.
  • the thread deflecting element 4a is resiliently supported and is pressed down by the retracting aligning element 2c, a reaction force F acting against the aligning element 2c being generated by the spring 6.
  • the eyelet 5a thus comes to lie in a precisely defined position in the thread guide channel 2a, 2b.
  • the thread guide and support device 2 can also be previously in a threading position are brought in and the thread deflecting element 4a is pivoted in subsequently, the thread deflecting element 4a exerting a spring force in the threading position on the aligning element 2c.
  • a fluid nozzle 24a with a feed line 25a is attached towards the end of the rising thread guide channel 2b, which causes a fluid flow directed approximately in the direction of a thread guide channel 21a-21d, around the weft thread 3a into and through a thread guide channel To promote 21a to 21d.
  • Further fluid nozzles for conveying the weft thread 3a can be fitted in the thread guide channel 2a, 2b, e.g. the fluid nozzle 24b with feed line 25b attached in the thread guide channel 2a.
  • the fluid nozzle 24b supports the necessary change in direction of the entering tip of the weft thread 3a in the region of the outlet opening of the thread guide channel 2a. This supports the threading of the weft thread 3a into the eyelet 5a.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP93810279A 1993-04-16 1993-04-16 Dispositif pour l'enfilage automatique d'un fil de trame dans un oeillet Withdrawn EP0621359A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP93810279A EP0621359A1 (fr) 1993-04-16 1993-04-16 Dispositif pour l'enfilage automatique d'un fil de trame dans un oeillet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP93810279A EP0621359A1 (fr) 1993-04-16 1993-04-16 Dispositif pour l'enfilage automatique d'un fil de trame dans un oeillet

Publications (1)

Publication Number Publication Date
EP0621359A1 true EP0621359A1 (fr) 1994-10-26

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2515609A1 (de) * 1975-04-10 1976-10-14 Dornier Gmbh Lindauer Verfahren und einrichtung zum auswaehlen und vorlegen von schussfaeden und zur verminderung des abfalls an schuetzenlosen webmaschinen
US4197882A (en) * 1977-08-18 1980-04-15 Nissan Motor Company, Limited Fluid jet shuttleless loom with resistance providing means for weft yarn
FR2538008A1 (fr) * 1982-12-17 1984-06-22 Alsacienne Constr Mat Tex Dispositif pour l'insertion d'un fil de trame dans la foule d'un metier a tisser
WO1990011397A1 (fr) * 1989-03-17 1990-10-04 Gebrüder Sulzer Aktiengesellschaft Dispositif pour passer un fil de trame dans un metier automatique
FR2680802A1 (fr) * 1991-09-03 1993-03-05 Nissan Motor Systeme d'amenee de fil pour une machine a tisser.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2515609A1 (de) * 1975-04-10 1976-10-14 Dornier Gmbh Lindauer Verfahren und einrichtung zum auswaehlen und vorlegen von schussfaeden und zur verminderung des abfalls an schuetzenlosen webmaschinen
US4197882A (en) * 1977-08-18 1980-04-15 Nissan Motor Company, Limited Fluid jet shuttleless loom with resistance providing means for weft yarn
FR2538008A1 (fr) * 1982-12-17 1984-06-22 Alsacienne Constr Mat Tex Dispositif pour l'insertion d'un fil de trame dans la foule d'un metier a tisser
WO1990011397A1 (fr) * 1989-03-17 1990-10-04 Gebrüder Sulzer Aktiengesellschaft Dispositif pour passer un fil de trame dans un metier automatique
FR2680802A1 (fr) * 1991-09-03 1993-03-05 Nissan Motor Systeme d'amenee de fil pour une machine a tisser.

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