EP1038061B1 - Storage device - Google Patents

Storage device Download PDF

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Publication number
EP1038061B1
EP1038061B1 EP98966299A EP98966299A EP1038061B1 EP 1038061 B1 EP1038061 B1 EP 1038061B1 EP 98966299 A EP98966299 A EP 98966299A EP 98966299 A EP98966299 A EP 98966299A EP 1038061 B1 EP1038061 B1 EP 1038061B1
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EP
European Patent Office
Prior art keywords
thread
storage device
adjustable
diverting
elements
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98966299A
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German (de)
French (fr)
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EP1038061A1 (en
Inventor
Pär JOSEFSSON
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Iropa AG
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Iropa AG
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    • DTEXTILES; PAPER
    • D03WEAVING
    • D03DWOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34Handling the weft between bulk storage and weft-inserting means
    • D03D47/36Measuring and cutting the weft
    • D03D47/361Drum-type weft feeding devices
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B65H59/36Floating elements compensating for irregularities in supply or take-up of material
    • DTEXTILES; PAPER
    • D03WEAVING
    • D03DWOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34Handling the weft between bulk storage and weft-inserting means
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00Handled material; Storage means
    • B65H2701/30Handled filamentary material
    • B65H2701/31Textiles threads or artificial strands of filaments

Definitions

  • the invention relates to a storage device in the preamble of the claim 1 specified Art.
  • a storage device for a rapier weaving machine has a series of scissors-like pivotable in opposite directions relative to each other Levers that are pivoted via a cam drive depending on the web cycle. Two such alternately working storage devices are provided, each of which during the entry from the other storage device temporarily saves the weft thread for the next entry with a zigzag-shaped thread course.
  • the drive connection between each swivel lever and the Cam drive is rigid. When entering, the swivel levers are removed from the storage position successively and starting with the one closest to the entry device Swivel lever in the entry position, however, also for temporary storage successively and starting with the one closest to the entry device Swivel lever adjusted to the storage position.
  • the against entries due to the momentary stopping of the weft thread on the upstream thread brake Stretching strands occurring in the thread can lead to undesirably high mechanical loads of the weft thread (risk of thread breakage).
  • each adjustable thread deflection element is already before the start of the entry returned to its entry position while the thread holder still holds the thread Intermediate store with the zigzag thread course.
  • the Thread holder starting with the thread holder closest to the insertion device, successively opened.
  • the path of movement of each adjustable thread deflecting element is either rectilinear or curved.
  • the thread holder can also be in one spatial, polygonal configuration to be arranged when caching position the thread zigzag in polygonal turns.
  • the invention has for its object to provide a storage device that in principle corresponds to the aforementioned, known storage devices and the Take advantage of the low take-off tension, and at the risk of thread breakage is reduced or eliminated towards the end of the entry.
  • the damping is carried out by applying a elastic damping force on the adjustable thread deflecting element against the insertion end remains in contact with the thread and until the entry position is reached Consumes energy from the thread.
  • the damping force is expediently smaller than the thread force, i.e. the force of the thread due to the thread tension or the increase in thread tension on the adjustable thread deflecting element, so that this reliably reaches the entry position and the removal of the entire stored length is not affected.
  • the adjustable thread deflecting element forcibly reset with a steaming delay towards the entry position, by means of its drive, so that towards the end of the entry a positive Thread delivery takes place at which the speed of the adjustment movement of the Thread deflection element determines the entry speed of the thread and thus energy is being consumed.
  • the damping delay is generated so that the Resistance of the thread deflecting element is greater than the thread force, so that not the thread returns the thread deflecting element to the entry position, but the drive remains responsible for this. Thanks to the energy consumption, the feared remains Stretching or whip effect.
  • a component required for the storage function is the Storage device, namely at least one adjustable thread deflecting element with The additional function of energy consumption is used when this component is no longer required for the storage function anyway.
  • a further embodiment is expediently at least the first adjustable thread deflection element in the thread insertion direction, or preferably a plurality of thread deflecting elements initially provided in the thread insertion direction used for steaming. This is useful because of the stretch stroke or whip effect only occurs towards or at the end of the entry when the others adjustable thread deflecting elements of the storage device already in or have reached their entry positions.
  • the storage device can be started simply adjust the respective entry conditions.
  • the storage device can pull the thread directly from a thread supply spool. However, because of the winding course on the supply reel and / or due to noticeable changes in thread tension due to the decrease in diameter of the winding result, it is appropriate (claim 7), the storage device to provide a thread delivery device so that the storage device the thread can pull off with a constant thread tension, possibly even a measuring delivery device, that of the storage device is exactly the predetermined one Thread length can be deducted.
  • the measuring delivery device is advantageous in two ways because it is largely constant tension ratios when deducted by the storage device guaranteed, and the thread length to be stored measured exactly. Because the measurement delivery device it is a largely rigid system in terms of thread length, it is recommended itself in the storage device from an elastic component to provide the thread tension damper in order to avoid undesired Exclude loads on the thread,
  • Expedient (claim 8) in the storage device are fixed and relative to the fixed adjustable thread deflecting elements provided together define the zigzag thread course during the saving process, or mutually adjustable Fadenumlenkemia or in addition to thread deflection elements that can be adjusted in opposite directions fixed thread deflection elements. This allows a large storage capacity with a reduced space requirement for the storage device achieve.
  • the storage device has stationary, controlled detachable thread holders that are zig-zag or winding-like Define the course of the thread, while the adjustable thread deflection elements at Store only as a thread feeder, and at least one of them as a damping element, act.
  • the thread deflecting element is a swivel lever which is adjusted by means of a suitable drive.
  • the drive can Adjust the swivel lever in both directions, or, e.g. against a return spring, only in one direction.
  • the pivot lever forms at the same time several thread deflecting elements that are synchronously adjustable and a common one Can have drive.
  • the adjustable thread deflection elements moved linearly by means of linear drives. This is a drive principle that has already proven itself in weaving machines for other purposes and high Adjustment speeds can be achieved with high adjustment precision.
  • the elastic damping force is control engineering simply generated via the electric drive, which can be adjusted with can control a higher adjustment current, hung for damping with a lower one Brake current is applied and then acts as an integrated spring.
  • a weft processing system in Fig. 1 is a weaving machine L with a Shed S indicated.
  • a weft thread is inserted into the shed S from a storage device E, while the other storage device E for the other weft W2 for caching another or the next entry with a predetermined length.
  • each storage device E Upstream and downstream of each storage device E is a controlled thread clamp 3 or 4 provided. If necessary, there is an additional one downstream of the thread clamp 4 controlled thread brake 5 arranged.
  • each storage device E a plurality of stationary thread deflecting elements 6 1 to 6 5 are arranged one behind the other in the direction of entry of each weft thread W1, W2.
  • a plurality of thread deflecting elements A to D adjustable transversely to the longitudinal direction of the thread are provided.
  • the thread deflecting elements are in the entry position II, in which they define an essentially stretched thread course.
  • the thread clamp 3 is closed.
  • the thread clamp 4 is open.
  • the entry device M has just entered the weft W1 into the shed S.
  • the controlled thread brake 5 (if present) has braked during the insertion process in order to bring about a predetermined braking effect which may vary via the insertion process.
  • the lower storage device E in FIG. 1 has brought the other weft thread W2 by moving the adjustable deflecting elements A to D into the storage position I in a zigzag-shaped thread course in order to store the thread length required for an entry.
  • the thread clamp 4 is closed and the thread clamp 3 is opened in order to pull off the weft thread W2 from the thread supply 2.
  • the adjustable thread deflecting elements A to E are expediently shifted from the entry position II into the storage position I, starting with the thread deflecting element D or C and D.
  • Each adjustable thread deflecting element A to D has its own drive 7 A , 7 B, or a common drive 7 C, D is provided for several adjustable thread deflecting element, as for the two thread deflecting elements C, D.
  • a thread tension damper Z is incorporated into each storage device E, which in the embodiment shown in FIG. 1 consists of the adjustable thread deflection element A, the stationary thread deflection element 6 2 , and a pretensioning element 8, here for example a tension spring (or the drive 7 A ) consists.
  • a tension spring or the drive 7 A
  • an elastic damping force R directed towards its storage position I is effective on the thread deflecting element A which is freely adjustable in the direction of its entry position II.
  • the adjustable thread deflection element A is a mechanical damping element N, which can be reset in the embodiment of FIG. 1 by the respective weft thread W1, W2 in a damping manner into the entry position II.
  • the thread clamp 3 is first closed and the thread clamp 4 opened. Then the adjustable thread deflecting elements A to D are successively and starting with the thread deflecting element D or C and D jointly adjusted from the storage position I to the entry position II, by means of their drives 7 A to 7 C, D , the insertion device M being the weft thread W2 begins to enter in the shed S. Assuming that the pretensioning element 8 generates the damping force R in FIG. 1, the drive 7 A releases the thread deflecting element A as soon as a predominant part of the stored thread length of the weft thread W2 has been entered.
  • the thread tension exerts a thread force F on the thread deflection element A, which acts in the direction of its insertion position II and overcomes the damping force R and adjusts the thread deflection element A to the insertion position II.
  • Energy is thereby consumed so that the expected stretching or whip effect in the thread at the end of the entry, caused by the momentary stopping of the weft thread W2 defined in the thread clamp 2 and pulled off by the weaving machine, is largely mitigated or eliminated.
  • the thread deflecting element A which is finally adjusted to the entry position II is held in position in the weft thread by the tensile force which is effective until the thread clamp 4 closes.
  • the drive 7 A then generates a holding force for the thread deflecting element A, although this is not absolutely necessary in these types of weaving machine.
  • a jet weaving machine F it is advantageous to prevent the thread deflecting element, which has been adjusted into the entry position II against the damping force R, at the end of the entry against a reversal of movement under the damping force R, in order not to retract the weft thread.
  • a mechanical safety device (not shown) or the drive 7 A can be used for this.
  • the damping force R is less than the thread force exerted by the thread on the thread deflecting element A. If the damping force R is generated by the drive 7 A , it is also lower than the thread force, so that the thread is able to force the thread deflecting element A under the damping effect to adjust to entry position II.
  • Damping delay means that the thread deflecting element A is forced into the entry position more slowly than it corresponds to the undamped thread insertion speed towards the end of the entry, so that the weft thread finally reaches the stretched thread course with a delay and is stopped at the closed thread clamp 3 and until then at least part of it the kinetic energy contained in the weft thread on the thread deflecting elements A and 6 2 has been consumed. In this way, a positive thread delivery takes place against the end of the input, under the action of the forcibly delayed return movement of the thread deflecting element A.
  • the adjustable thread deflecting element B is a pivot lever 9 which is attached to a drive shaft 10 of the drive 7B.
  • the drive 7B is a rotary drive G, for example a stepper motor, a rotary magnet or an electric motor.
  • the drive 7 B is able, for example, to generate torques + T B and -T B in both adjustment directions.
  • the length of the swivel lever 9 double arrow 12
  • the height position of the drive 7B can be changed and / or the swivel angle of the swivel lever 9 between the entry position II and the storage position I or I '.
  • the pivot lever 9 expediently carries a thread eyelet 11.
  • the pivot lever 9 could be designed as a straight rod. If the thread deflection element B is used as a component of the thread tension damper Z, then the pretensioning element 8 could act on the swivel lever 9. The drive 7B may then only need to generate the torque + T B , but not the torque -T B. If the thread deflection element B is not part of the thread tension damper Z, then the drive 7 B could only work in one direction of adjustment and against a return spring (not shown), which is responsible for the adjustment in the non-driven direction.
  • the adjustable thread deflecting element B in FIG. 2 is assigned the two stationary thread deflecting elements 6 2 and 6 3 , expediently thread eyelets in each case.
  • the stationary thread deflecting elements 6 2 and 6 3 could additionally be provided between two mutually adjustable thread deflecting elements B, C (FIG. 2).
  • the adjustable thread deflecting elements A to C are linearly movable rods 9 ", expediently equipped with thread eyelets which are adjusted by their drives 7 A to 7 C designed as linear drives H, either in both adjustment directions or only in the adjustment direction for the storage position 3, thread-deflecting elements B, C which can be adjusted in the same direction could each be provided with an intermediate stationary thread-deflecting element 6 3 , or only thread-deflecting elements A, B, which can be adjusted in pairs in opposite directions, or even adjustable in opposite directions into their storage positions Thread deflecting elements A and B, each with an intermediate stationary thread deflecting element 6 2.
  • the oppositely adjustable thread deflecting elements could also only serve as thread feeders to thread holders, for example according to FIG.
  • FIG. 4 shows a detail of a further embodiment of a memory device.
  • the course of the thread in the storage position is defined by stationary thread holders 13, each of which is assigned a thread deflection element B, which is adjustable for storage, as a thread feeder.
  • Transversely displaced stationary thread deflection elements could be assigned to the thread holders 13, analogously to the thread deflection elements 6 1 to 6 5 in FIG. 1.
  • the thread holders 13 could be lined up offset from one another together with adjustable thread deflecting elements working in opposite directions as thread feeders.
  • each thread holder 13 has an adjustable thread catcher 14, if necessary in the direction of a catch position acted upon by a spring 15, and abutment 17 and a trigger drive 16.
  • the adjustable thread deflection element B is moved laterally past the thread holder 13 so that the weft thread brought along W1 enters the abutment 17, slides under the thread catcher 14, and at Moving back the adjustable thread deflection element B held there.
  • the Catch hook 14 adjusted against the force of the spring 15 so that it is on the abutment 17th strips off the caught weft W and this is released for entry.
  • the thread tension damper (not shown) adjustable thread deflecting element, e.g. B, at abutment 17 ready to release Pick up the weft thread and dampen it until the entry position.
  • the storage device E in which the thread tension damper Z is the two contains first, adjustable thread deflecting elements A and B in the entry direction, upstream of the thread clamp 3, a thread delivery device 18, which carries the weft W1 withdraws from the thread supply 1 and on a storage body 20 for withdrawal provides substantially constant thread tension.
  • the thread delivery device 18 is of conventional design and has a winding element which can be driven in rotation 19 for winding the thread on the storage body 20 and optionally one Trigger brake 21.
  • the storage device E in Fig. 6 for the weft W1 is upstream of the thread clamp 3 also a thread delivery device 18 'in front of the thread from the thread supply 1 subtracts and on a storage body 20 'in adjacent turns ready for deduction with a substantially constant voltage level.
  • the Thread delivery device 18 ' is a so-called measuring delivery device with a stop device 22, which precisely measures the thread length to be subtracted.
  • the storage device C is the first adjustable thread deflection element A in the direction of entry, which by the elastic pretensioning force is applied, part of the thread tension damper Z.
  • the two adjustable thread deflecting elements C, D are formed by a common pivot lever 9 ', which is designed with two legs and is attached to the shaft 10 of the drive 7 C, D.
  • a stationary thread deflecting element 6 3 , 6 4 , and 6 5 is provided on each side of the pivot lever 9 'and between its legs.
  • the drive 7 C, D which can be a stepper motor, an electric motor or a rotating magnet G, is assigned an electrical or electronic control device P, via which the adjusting movements of the pivot lever 9 'can be controlled.
  • the drive 7 C, D expediently performs adjustment movements in both adjustment directions (torques T C, D and -T C, D ). However, it would also be conceivable to use the drive 7 C, D only to perform the actuating movement to the storage position II against a return spring, not shown.
  • the aforementioned embodiment could also be part of the thread tension damper Z, analogous to FIG. 5, used for the adjustable thread deflecting elements A, B. become.
  • the control device P would operate as indicated in FIG. 7A.
  • the admission current V or the adjustment path S of the swivel lever 9 'between the entry position II and the storage position I is plotted.
  • the horizontal axis is, for example, a time axis or represents the angle of rotation of the main shaft of the weaving machine.
  • the solid curve 23 represents the current applied to the drive during a storage process and a subsequent entry process.
  • the dashed curve 24 represents the actuating movement via a storage process and the subsequent entry process. According to curve 23, the current application is first controlled up to a maximum value V T in order to adjust the thread deflection elements A, B according to curve 24 into the storage position I.
  • a cylinder 26 is formed in a housing 25 and can be pressurized with compressed air via an inlet 27.
  • the inlet 27 is preceded by a control valve, not shown, which either connects the cylinder 26 to a pressure source or unloads directly or throttled.
  • a piston 28 can be moved in a sealed manner and has a longitudinal slot or groove 30 for an engagement element 29, which limits the stroke of the cylinder 28 and is responsible for securing it against rotation.
  • the piston 28 is extended by a rod 9 "which carries a fork 32.
  • a return spring 31 counteracts the pressurization of the piston 28 in the cylinder 26.
  • the stationary thread deflection elements 6 3 , 6 4 , 6 5 can also be arranged on the housing 25, which are assigned to the adjustable thread deflection elements C, D in order to define a total of five deflection points for the thread.
  • the control valve Connects the control valve, not shown, to relieve the cylinder 26 via a Throttle point e.g. with the outside atmosphere, then through the throttled outflow the compressed air from the cylinder 26 already produces the elastic damping force R, if the adjustable thread deflection elements, here C, D, part of the thread tension damper Z are.
  • the damping can be achieved through the interaction between the return spring 31 and a forced actuating movement for the entry position produce.
  • the function of the memory device E from FIG. 1 is explained with reference to FIG. 9.
  • the adjustment paths of the adjustable thread deflection elements A to D between the entry position and the storage position and vice versa are plotted on the vertical axis.
  • the horizontal axis is a time axis or represents the angle of rotation of the main shaft of the weaving machine.
  • the adjustable thread deflecting elements are successively adjusted to their storage positions I, starting with the thread deflecting element D.
  • the drive torques T D to T A become approximately analog to Fig. 2 generated.
  • the weft thread is stored with a zigzag thread course.
  • the entry begins at time X, the thread deflecting element D being adjusted first by the adjusting force -T D in the direction of the entry position II, and successively also the further adjustable thread deflecting elements C, B, and expediently with a temporal overlap ,
  • the thread deflection element A belonging to the thread tension damper Z is finally adjusted against the end of the insertion by the thread force F to the insertion position II because the damping force R is effective at least over a considerable part of the travel.
  • the thread deflecting element A has reached its entry position II (stretched thread course). It is then prevented either by the thread force F or by a holding force -T A from the drive 7 A from reversing the movement under the damping force R which still acts.
  • By delaying the movement of the thread deflecting element A kinetic energy is consumed in the thread, so that a stretching stroke or whip effect to be feared at the end of the insertion is weakened or no longer has an effect.
  • the adjustable thread deflecting element A of the thread tension damper Z is forcibly moved from the storage position I to the entry position II with a delay, a speed curve similar to that indicated in FIG. 9 on the far right results.
  • the thread deflecting element A is then adjusted at least over the largest part of its travel range by the driving force -T A , so that the thread entered has to follow the speed profile exactly and thereby emits energy.
  • FIG. 10 schematically illustrates the thread force or thread tension via an entry.
  • the thread tension increases sharply in accordance with curve 33 up to a maximum value and then remains approximately constant until it ends at the entry Y grows again extremely, namely in area K due to the stretching impact or whip effect when stopping the thread.
  • the curve area K is alleviated or completely eliminated.
  • Dashed lines indicate at Q, such as in a rapier weaving machine due to the transfer from the bringer gripper to the slave gripper the thread tension temporarily drops and rises again. In this case too, the harmful extreme voltage rise K becomes against the entry mitigated or largely eliminated.
  • both thread clamps 3, 4 can be opened, so that thread is drawn directly from the supply 1, 2 or their delivery device 18 can. Then it can be advantageous to use the controlled or passive one at the end of the entry To use thread brake 5 for thread control.

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

Abstract

A storage device (E) for the weft yarn (W1,W2) of a power loom (L), wherein several yarn deflector elements (A-D, 61-65) are arranged along the path of the yarn leading from the yarn reserve to a feeder device (M) and at least one of said elements can move in relation to at least one other element in perpendicular manner with respect to the longitudinal direction of the yarn between a feed position (wherein the yarn runs in a substantially drawn position) and a storage position (1) in which the yarn runs in the form of a zigzag . One regulating device with at least one drive mechanism (71-7B) is provided and connected to each moveable yarn deflector element. A yarn tension damper is integrated into the storage device (E), having at least one first yarn deflector element (A) which can move in the direction in which the yarn is fed as an elastically readjusting damping element (N) moving towards the end of the feed when the yarn is tensioned.

Description

Die Erfindung betrifft eine Speichervorrichtung der im Oberbegriff des Patentanspruchs 1 angegebenen Art.The invention relates to a storage device in the preamble of the claim 1 specified Art.

Eine Speichervorrichtung gemäß DE 15 356 25 für eine Greiferschützenwebmaschine weist eine Reihe von jeweils scherenartig gegensinnig relativ zueinander verschwenkbaren Hebeln auf, die über einen Nockenantrieb webtaktabhängig verschwenkt werden. Es sind zwei solche wechselweise arbeitende Speichervorrichtungen vorgesehen, deren jede während des Eintrags aus der jeweils anderen Speichervorrichtung den Schußfaden für den nächsten Eintrag mit zick-zack-förmigem Fadenverlauf zwischenspeichert. Die Antriebsverbindung zwischen jedem Schwenkhebel und dem Nockenantrieb ist starr. Beim Eintrag werden die Schwenkhebel aus der Speicherstellung sukzessive und beginnend mit dem der Eintragvorrichtung nächstliegenden Schwenkhebel in die Eintragstellung, hingegen zum Zwischenspeichern ebenfalls sukzessive und beginnend mit dem der Eintragvorrichtung nächstliegenden Schwenkhebel in die Speicherstellung verstellt. Der gegen Eintragende aufgrund des momentanen Abstoppens des Schußfadens an der stromaufliegenden Fadenbremse im Faden entstehende Streckschlag kann zu unerwünscht hohen mechanischen Belastungen des Schußfadens führen (Fadenbruchgefahr).A storage device according to DE 15 356 25 for a rapier weaving machine has a series of scissors-like pivotable in opposite directions relative to each other Levers that are pivoted via a cam drive depending on the web cycle. Two such alternately working storage devices are provided, each of which during the entry from the other storage device temporarily saves the weft thread for the next entry with a zigzag-shaped thread course. The drive connection between each swivel lever and the Cam drive is rigid. When entering, the swivel levers are removed from the storage position successively and starting with the one closest to the entry device Swivel lever in the entry position, however, also for temporary storage successively and starting with the one closest to the entry device Swivel lever adjusted to the storage position. The against entries due to the momentary stopping of the weft thread on the upstream thread brake Stretching strands occurring in the thread can lead to undesirably high mechanical loads of the weft thread (risk of thread breakage).

Bei einer aus DE 15 35 644 bekannten Speichervorrichtung für eine Greiferschützenwebmaschine ist zusätzlich zu den jeweils paarweise gegensinnig und scherenartig verschwenkbaren Hebeln als verstellbare Fadenumlenkelemente, ein Längsträger vorgesehen, der zusätzliche stationäre Umlenkelemente bildet, um durch einen räumlichen zick-zack-förmigen Fadenverlauf eine noch größere Schußfadenlänge auf engem Raum zu speichern. Als Antrieb für die verstellbaren Fadenumlenkelemente sind Zahnstangen und Ritzel vorgesehen, so daß die Speichervorrichtung keinerlei federnde Komponenten enthält. Gegen Eintragende kann der gefürchtete Streckschlag im Faden zu unerwünscht hohen Belastungen (Fadenbruchgefahr) führen. Diese bekannten Speichervorrichtungen sind für moderne Webmaschinen kaum brauchbar, obwohl sie mit wünschenswert niedriger Abzugsspannung im Schußfaden arbeiten, weil z.B. in einer Düsenwebmaschine der Schußfaden am Eintragende beim schlagartigen Abstoppen einen ausgeprägten Streckschlag (Peitscheneffekt) erfährt und leicht brechen kann.In a storage device known from DE 15 35 644 for a rapier weaving machine is in addition to the pairs in opposite directions and scissors-like swiveling levers as adjustable thread deflection elements, one side member provided, which forms additional stationary deflecting elements to by a spatial zigzag-shaped thread course an even greater weft thread length on tight Save space. As a drive for the adjustable thread deflection elements Racks and pinions are provided so that the storage device has no resilient Contains components. The dreaded stroke can be made against entries lead to undesirably high loads in the thread (risk of thread breakage). These well-known Storage devices are hardly usable for modern weaving machines, although they work with a desirably low draw tension in the weft, because e.g. in a jet weaving machine the weft thread at the end of the entry during the sudden Stopping experiences a pronounced stretch stroke (whip effect) and can easily break.

Bei einer aus DE-A-32 02 229 bekannten Speichervorrichtung dieser Art dienen die verstellbaren Fadenumlenkelemente nur als Fadenzubringer zu gesteuert lösbaren Fadenhaltern. Jedes verstellbaren Fadenumlenkelement ist bereits vor Eintragbeginn wieder in seine Eintragstellung rückgestellt, während die Fadenhalter den Faden noch mit dem zick-zack-förmigen Fadenverlauf zwischenspeichern. Zum Eintrag werden die Fadenhalter, beginnend mit dem der Eintragvorrichtung nächstliegenden Fadenhalter, sukzessive geöffnet. Die Bewegungsbahn jedes verstellbaren Fadenumlenkelementes ist entweder geradlinig oder bogenförmig. Die Fadenhalter können auch in einer räumlichen, polygonalen Konfiguration angeordnet sein, um beim Zwischenspeichern der Speicherstellung den Faden zick-zack-förmig in polygonalen Windungen zu positionieren. Da der Faden beim Eintrag nach Lösen jedes Fadenhalters frei abziehbar ist, tritt gegen Eintragende beim Abstoppen des abgezogenen Fadens an der stromaufliegenden geschlossenen Fadenbremse im Faden ein Streckschlag bzw. Peitscheneffekt auf, der in einer momentanen Spannungspitze resultiert, die leicht zu einem fadenbruch führt.In a storage device of this type known from DE-A-32 02 229, the serve adjustable thread deflection elements only as thread feeder to controlled releasable Thread holders. Each adjustable thread deflection element is already before the start of the entry returned to its entry position while the thread holder still holds the thread Intermediate store with the zigzag thread course. The Thread holder, starting with the thread holder closest to the insertion device, successively opened. The path of movement of each adjustable thread deflecting element is either rectilinear or curved. The thread holder can also be in one spatial, polygonal configuration to be arranged when caching position the thread zigzag in polygonal turns. Because the thread can be pulled off freely when each thread holder is loosened is against the entry end when stopping the withdrawn thread on the upstream closed thread brake in the thread a stretching blow or whip effect which results in an instantaneous voltage spike that easily becomes one thread breakage leads.

Der Erfindung liegt die Aufgabe zugrunde, eine Speichervorrichtung zu schaffen, die prinzipiell den vorerwähnten, bekannten Speichervorrichtungen entspricht und den Vorteil der geringen Abzugsspannung nutzen läßt, und bei der die Gefahr eines Fadenbruches gegen Eintragende vermindert oder eliminiert ist.The invention has for its object to provide a storage device that in principle corresponds to the aforementioned, known storage devices and the Take advantage of the low take-off tension, and at the risk of thread breakage is reduced or eliminated towards the end of the entry.

Die gestellte Aufgabe wird erfindungsgemäß mit den Merkmalen des Patentanspruchs 1 gelöst.The object is achieved according to the invention with the features of the patent claim 1 solved.

Da in die Speichervorrichtung ein Fadenspannungsdämpfer eingegliedert ist, der gegen Eintragende die kinetische Energie des unvermeidbaren Streckschlages bzw. Peitscheneffekts zumindest weitgehend dämpfend aufzehrt, ist die Gefahr eines Fadenbruches spürbar verringert. Das dem Fadenspannungsdämpfer angehörende, verstellbare Fadenumlenkelement läßt nämlich am Eintragende den Faden nicht mehr frei abziehen, sondern so gedämpft, daß zwar die gespeicherte Fadenlänge eingetragen wird, jedoch über den letzten Teil des Eintragvorganges ein Teil der im Faden enthaltenen kinetischen Energie abgebaut bzw. aufgezehrt wird, um den Faden zu schonen. Auf diese Weise wird der wichtige Vorteil der geringen Abzugsspannung einer solchen Schlaufen-Speichervorrichtung im Vergleich zu Trommelspeichern mit signifikant hohen Ballonkräften im Faden genutzt, während der Nachteil des systembedingten Streckschlags bzw. Peitscheneffekts spürbar gemildert oder eliminiert wird.Since a thread tension damper is incorporated into the storage device, the against Entering the kinetic energy of the inevitable stretch impact or Whip up the whip effect at least largely, is the danger of a thread break noticeably reduced. The thread tension damper belonging to adjustable thread deflecting element namely does not leave the thread at the end of the entry subtract freely, but damped so that the stored thread length is entered becomes, however, over the last part of the entry process part of the thread contained kinetic energy is broken down or consumed to close the thread conserve. In this way, the important advantage of low pull-off voltage becomes one such loop storage device compared to drum storage with significant high balloon forces used in the thread, while the disadvantage of the system-related Stretching or whip effect is noticeably mitigated or eliminated.

Bei einer Ausführungsform (Anspruch 2) erfolgt die Dämpfung durch Aufbringen einer elastischen Dämpfkraft auf das verstellbare Fadenumlenkelement, das gegen Eintragende in Kontakt mit dem Faden bleibt und bis zum Erreichen der Eintragstellung Energie aus dem Faden aufzehrt. Die Dämpfkraft ist dabei zweckmäßigerweise kleiner als die Fadenkraft, d.h. die Kraft, die der Faden aufgrund der Fadenspannung oder des Fadenspannungsanstiegs auf das verstellbare Fadenumlenkelement ausübt, damit dieses zuverlässig die Eintragstellung erreicht und das Abziehen der gesamten gespeicherten Länge nicht beeinträchtigt. Bei der Rückstellung des Fadenumlenkelementes zur Eintragstellung wird dieses vom Faden angetrieben, wodurch die wünschenswerte Energieaufzehrung stattfindet.In one embodiment (claim 2), the damping is carried out by applying a elastic damping force on the adjustable thread deflecting element against the insertion end remains in contact with the thread and until the entry position is reached Consumes energy from the thread. The damping force is expediently smaller than the thread force, i.e. the force of the thread due to the thread tension or the increase in thread tension on the adjustable thread deflecting element, so that this reliably reaches the entry position and the removal of the entire stored length is not affected. When resetting the thread deflecting element for entry this is driven by the thread, whereby the desirable energy consumption takes place.

Bei einer Ausführungsform (Anspruch 3) wird das verstellbare Fadenumlenkelement zwangsweise mit einer Dämpfverzögerung in Richtung zur Eintragstellung zurückgestellt, und zwar mittels seines Antriebes, so daß gegen Ende des Eintrags eine positive Fadenlieferung stattfindet, bei der die Geschwindigkeit der Verstellbewegung des Fadenumlenkelementes die Eintraggeschwindigkeit des Fadens bestimmt und somit eine Energieaufzehrung stattfindet. Die Dämpfverzögerung wird so erzeugt, daß der Widerstand des Fadenumlenkelementes größer ist als die Fadenkraft, so daß nicht der Faden das Fadenumlenkelement in die Eintragstellung rückstellt, sondern der Antrieb hierfür verantwortlich bleibt. Dank der Energieaufzehrung, bleibt der gefürchtete Streckschlag bzw. Peitscheneffekt aus. In one embodiment (claim 3), the adjustable thread deflecting element forcibly reset with a steaming delay towards the entry position, by means of its drive, so that towards the end of the entry a positive Thread delivery takes place at which the speed of the adjustment movement of the Thread deflection element determines the entry speed of the thread and thus energy is being consumed. The damping delay is generated so that the Resistance of the thread deflecting element is greater than the thread force, so that not the thread returns the thread deflecting element to the entry position, but the drive remains responsible for this. Thanks to the energy consumption, the feared remains Stretching or whip effect.

Bei beiden Alternativen wird eine für die Speicherfunktion benötigte Komponente der Speichervorrichtung, nämlich zumindest ein verstellbares Fadenumlenkelement, mit der zusätzlichen Funktion der Energieaufzehrung dann eingesetzt, wenn diese Komponente ohnedies nicht mehr für die Speicherfunktion benötigt wird.In both alternatives, a component required for the storage function is the Storage device, namely at least one adjustable thread deflecting element with The additional function of energy consumption is used when this component is no longer required for the storage function anyway.

Bei einer weiteren Ausführungsform (Anspruch 4) wird zweckmäßigerweise zumindest das in Fadeneintragrichtung erste verstellbare Fadenumlenkelement, oder werden vorzugsweise mehrere in Fadeneintragrichtung anfänglich vorgesehene Fadenumlenkelemente zum Abdämpfen verwendet. Dies ist zweckmäßig, weil der Streckschlag bzw. Peitscheneffekt erst gegen oder am Ende des Eintrags auftritt, wenn die weiteren verstellbaren Fadenumlenkelemente der Speichervorrichtung ohnedies bereits in oder bei ihren Eintragstellungen angelangt sind.In a further embodiment (claim 4) is expediently at least the first adjustable thread deflection element in the thread insertion direction, or preferably a plurality of thread deflecting elements initially provided in the thread insertion direction used for steaming. This is useful because of the stretch stroke or whip effect only occurs towards or at the end of the entry when the others adjustable thread deflecting elements of the storage device already in or have reached their entry positions.

Bei einer weiteren Ausführungsform (Anspruch 5) läßt sich die Speichervorrichtung an die jeweiligen Eintragbedingungen einfach anpassen.In a further embodiment (claim 5), the storage device can be started simply adjust the respective entry conditions.

Bei Greiferschützen- oder Projektilwebmaschinen zieht die Webmaschine selbsttätig die jeweils benötigte Fadenlänge aus der Speichervorrichtung ab. Die elastische Dämpfkraft des Spannungsdämpfers zehrt Energie auf, aber beeinträchtigt das Abziehen der gespeicherten Fadenlänge nicht. Eine Düsenwebmaschine ist gegebenenfalls nicht in der Lage, selbsttätig die eingetragene Fadenlänge zu halten, falls am Eintragende die elastische Dämpfkraft noch wirkt. Zweckmäßig (Anspruch 6) wird deshalb das mit der elastischen Dämpfkraft belastete Fadenumlenkelement des Fadenspannungsdämpfers gegen eine Bewegungsumkehr in Richtung zur Speicherstellung gesperrt, damit der Fadenspannungsdämpfer den Schußfaden nicht aus dem Fach der Düsenwebmaschine zurückzieht.With rapier or projectile weaving machines, the weaving machine pulls automatically the thread length required in each case from the storage device. The elastic The damping force of the tension damper consumes energy, but impairs the pulling off the stored thread length is not. A jet loom is optional unable to hold the entered thread length automatically if on The elastic damping force still acts. Expedient (claim 6) therefore the thread deflection element of the thread tension damper loaded with the elastic damping force against a reversal of movement towards the storage position locked so that the thread tension damper does not remove the weft from the The loom loom retracts.

Die Speichervorrichtung kann den Faden direkt von einer Fadenvorratsspule abziehen. Da sich jedoch aufgrund des Wickelverlaufes auf der Vorratsspule und/oder aufgrund der Durchmesserabnahme der Wicklung beim Verbrauch spürbare Fadenspannungsänderungen ergeben, ist es zweckmäßig (Anspruch 7), der Speichervorrichtung ein Fadenliefergerät vorzusetzen, damit die Speichervorrichtung den Faden mit konstanter Fadenspannung abziehen kann, ggfs. sogar ein Meßliefergerät, das der Speichervorrichtung jeweils exakt die vorbestimmte Fadenlänge abziehen läßt. Das Meßliefergerät ist zweifach vorteilhaft, weil es weitgehend konstante Spannungsverhältnisse beim Abzug durch die Speichervorrichtung gewährleistet, und die zu speichernde Fadenlänge exakt bemißt. Da das Meßliefergerät bezüglich der Fadenlänge ein weitgehend starres System darstellt, empfiehlt es sich, in der Speichervorrichtung abeine elastische Komponente den Fadenspannungsdämpfer vorzusehen, um unerwünschte Belastungen für den Faden auszuschließen,The storage device can pull the thread directly from a thread supply spool. However, because of the winding course on the supply reel and / or due to noticeable changes in thread tension due to the decrease in diameter of the winding result, it is appropriate (claim 7), the storage device to provide a thread delivery device so that the storage device the thread can pull off with a constant thread tension, possibly even a measuring delivery device, that of the storage device is exactly the predetermined one Thread length can be deducted. The measuring delivery device is advantageous in two ways because it is largely constant tension ratios when deducted by the storage device guaranteed, and the thread length to be stored measured exactly. Because the measurement delivery device it is a largely rigid system in terms of thread length, it is recommended itself in the storage device from an elastic component to provide the thread tension damper in order to avoid undesired Exclude loads on the thread,

Zweckmäßig (Anspruch 8) sind in der Speichervorrichtung feststehende und relativ zu den feststehenden verstellbare Fadenumlenkelemente vorgesehen, die gemeinsam den zick-zack-förmigen Fadenverlauf beim Speichervorgang definieren, oder zueinander gegensinnig verstellbare Fadenumlenkelemente oder zusätzlich zu gegensinnig verstellbaren Faden-Umlenkelementen feststehende Fadenumlenkelemente. Dadurch läßt sich bei verringertem Platzbedarf für die Speichervorrichtung eine große Speicherkapazität erzielen.Expedient (claim 8) in the storage device are fixed and relative to the fixed adjustable thread deflecting elements provided together define the zigzag thread course during the saving process, or mutually adjustable Fadenumlenkelemente or in addition to thread deflection elements that can be adjusted in opposite directions fixed thread deflection elements. This allows a large storage capacity with a reduced space requirement for the storage device achieve.

Bei einer Ausführungsform (Anspruch 9) weist die Speichervorrichtung stationäre, gesteuert lösbare Fadenhalter auf, die den zick-zack-förmigen oder windungsähnlichen Fadenverlauf definieren, während die verstellbaren Fadenumlenkelemente beim Speichern nur als Fadenzubringer, und wenigstens eines davon als Dämpfelement, fungieren.In one embodiment (claim 9), the storage device has stationary, controlled detachable thread holders that are zig-zag or winding-like Define the course of the thread, while the adjustable thread deflection elements at Store only as a thread feeder, and at least one of them as a damping element, act.

Bei einer Ausführungsform (Anspruch 10) werden im Fadenspannungsdämpfer insgesamt fünf Reibungsstellen für die Abdämpffunktion eingesetzt. Die Energieaufzehrung wird auf die Reibungsstellen verteilt, so daß die spezifische Belastung des Fadens gering bleibt.In one embodiment (claim 10) in the thread tension damper as a whole five friction points used for the damping function. The energy consumption is distributed over the friction points so that the specific load on the thread remains low.

Baulich einfach ist (Anspruch 11) das Fadenumlenkelement ein Schwenkhebel, der mittels eines jeweils passenden Antriebs verstellt wird. Der Antrieb kann den Schwenkhebel in beiden Stellrichtungen verstellen, oder, z.B. gegen eine Rückstellfeder, nur in einer Stellrichtung.Structurally simple (claim 11), the thread deflecting element is a swivel lever which is adjusted by means of a suitable drive. The drive can Adjust the swivel lever in both directions, or, e.g. against a return spring, only in one direction.

Bei einer anderen Ausführungsform (Anspruch 12) bildet der Schwenkhebel gleichzeitig mehrere Fadenumlenkelemente, die synchron verstellbar sind und einen gemeinsamen Antrieb haben können.In another embodiment (claim 12), the pivot lever forms at the same time several thread deflecting elements that are synchronously adjustable and a common one Can have drive.

Bei einer Ausführungsform (Anspruch 13) werden die verstellbaren Fadenumlenkelemente linear bewegt, und zwar mittels Linearantrieben. Dies ist ein Antriebsprinzip, das sich bei Webmaschinen für andere Zwecke bereits bewähren konnte und hohe Verstellgeschwindigkeiten bei hoher Verstellpräzision erzielen läßt. In one embodiment (claim 13), the adjustable thread deflection elements moved linearly by means of linear drives. This is a drive principle that has already proven itself in weaving machines for other purposes and high Adjustment speeds can be achieved with high adjustment precision.

Bei einer Ausführungsform (Anspruch 14) wird die elastische Dämpfkraft steuerungstechnisch einfach über den elektrischen Antrieb erzeugt, der sich zum Verstellen mit einem höheren Verstellstrom steuern läßt, zum Dämpfen hingen mit einem niedrigeren Bremsstrom beaufschlagt wird und dann wie eine integrierte Feder wirkt.In one embodiment (claim 14), the elastic damping force is control engineering simply generated via the electric drive, which can be adjusted with can control a higher adjustment current, hung for damping with a lower one Brake current is applied and then acts as an integrated spring.

Im Kern zielen alle vorerwähnten Merkmale auf eine in die Speichervorrichtung integrierte Dämpffunktion, für die eine ohnedies systembedingt vorhandene Komponente der Speichervorrichtung dann benutzt wird, wenn sie für die Speicherfunktion nicht mehr erforderlich ist. Damit wird diese modifizierte Speichervorrichtunng hervorragend geeignet für moderne Webmaschinen (Düsen-, Greifer- oder Projektil-Webmaschinen) mit den heute üblichen hohen Eintragfrequenzen und Eintraggeschwindigkeiten, bei denen der gefürchtete Streckschlag bzw. Peitscheneffekt zum Ende des Eintrags auftritt. Zweckmäßigerweise ist die Speichervorrichtung jedoch nicht dafür bestimmt, den Schußfaden für zwei unmittelbar aufeinanderfolgende Einträge zu liefern, sondem höchstens für jeden zweiten Eintrag, um für den Speichervorgang mindestens die Zeitspanne eines Eintrages nutzen zu können.In essence, all of the aforementioned features are aimed at one integrated into the storage device Damping function for which a component that is already present due to the system the storage device is used when it is not for the storage function more is needed. This modified storage device is thus outstanding suitable for modern weaving machines (jet, rapier or projectile weaving machines) with today's high entry frequencies and entry speeds, where the dreaded stroke or whip effect at the end of the entry occurs. The storage device is, however, expediently not intended to to supply the weft thread for two immediately consecutive entries at most for every second entry, in order for the storage process at least to be able to use the time span of an entry.

Anhand der Zeichnung werden Ausführungsformen des Erfindungsgegenstandes erläutert. Es zeigen:

Fig. 1
eine schematische Ansicht eines Schußfaden-Verarbeitungssystems,
Fig. 2
eine perspektivische Detailansicht zu mehreren Varianten einer Speichervorrichtung, wie sie in Fig. 1 angedeutet ist,
Fig. 3
eine weitere, perspektivische Detailansicht zu mehreren Ausführungsvarianten einer Speichervorrichtung,
Fig. 4
zwei Schemadarstellungen einer weiteren Ausführungsform,
Fig. 5
schematisch einen Teil einer anderen Ausführungsform eines Schußfadenverarbeitungssystems,
Fig. 6
schematisch einen Teil einer weiteren Ausführungsform eines Schußfadenverarbeitungssystems,
Fig. 7
zwei einander zugeordnete Ansichten eines Details einer Speichervorrichtung,
Fig. 7A
ein Diagramm zur Verdeutlichung der Funktion der Ausführungsform von Fig. 7,
Fig. 8
zwei einander zugeordnete Schnittansichten eine weiteren Detailaus-führung,
Fig. 9
ein Diagramm zur Verdeutlichung der Funktion der Speichervorrichtung, und
Fig. 10
ein Diagramm zur Verdeutlichung der Wirkung des Fadenspannungsdämpfers.
Embodiments of the subject matter of the invention are explained with the aid of the drawing. Show it:
Fig. 1
1 shows a schematic view of a weft processing system,
Fig. 2
2 shows a perspective detailed view of several variants of a storage device, as indicated in FIG. 1,
Fig. 3
5 shows a further, perspective detailed view of several design variants of a storage device,
Fig. 4
two schematic representations of a further embodiment,
Fig. 5
schematically shows a part of another embodiment of a weft processing system,
Fig. 6
schematically shows a part of a further embodiment of a weft processing system,
Fig. 7
two mutually associated views of a detail of a storage device,
Figure 7A
7 shows a diagram to illustrate the function of the embodiment from FIG. 7,
Fig. 8
two mutually assigned sectional views a further detailed version,
Fig. 9
a diagram illustrating the function of the memory device, and
Fig. 10
a diagram to illustrate the effect of the thread tension damper.

In einem Schußfaden-Verarbeitungssystem in Fig. 1 ist eine Webmaschine L mit einem Webfach S angedeutet. An einer Seite der Webmaschine L ist eine Eintragvorrichtung bzw. Schußfadenwechselvorrichtung M angeordnet, vor der sich in Eintragrichtung (in Fig. 1 von links nach rechts) zwei nebeneinanderliegende Speichervorrichtungen E befinden, die jeweils einen Schußfaden W1 bzw. W2 von Fadenvorräten 1, 2 (Fadenspulen) abziehen. In dem Schußfaden-Verarbeitungsystem wird jeweils aus einer Speichervorrichtung E ein Schußfaden in das Webfach S eingetragen, während die jeweils andere Speichervorrichtung E den anderen Schußfaden W2 für einen weiteren oder den nächsten Eintrag mit vorbestimmter Länge zwischenspeichert. In a weft processing system in Fig. 1 is a weaving machine L with a Shed S indicated. On one side of the weaving machine L there is an insertion device or weft changing device M arranged in front of the entry direction (from left to right in Fig. 1) two adjacent storage devices E are located, each a weft W1 or W2 of thread stores Pull off 1, 2 (thread spools). In the weft processing system, respectively a weft thread is inserted into the shed S from a storage device E, while the other storage device E for the other weft W2 for caching another or the next entry with a predetermined length.

Stromauf und stromab jeder Speichervorrichtung E ist eine gesteuerte Fadenklemme 3 bzw. 4 vorgesehen. Gegebenenfalls ist zusätzlich stromab der Fadenklemme 4 eine gesteuerte Fadenbremse 5 angeordnet.Upstream and downstream of each storage device E is a controlled thread clamp 3 or 4 provided. If necessary, there is an additional one downstream of the thread clamp 4 controlled thread brake 5 arranged.

In jeder Speichervorrichtung E sind in Eintragrichtung jedes Schußfadens W1, W2 mehrere stationäre Fadenumlenkelemente 61 bis 65 mit Zwischenabständen hintereinander angeordnet. An der den stationären Fadenumlenkelementen 61 bis 65 gegenüberliegenden Seite des Schußfadens W1 bzw. W2 sind mehrere quer zur Fadenlängsrichtung verstellbare Fadenumlenkelemente A bis D vorgesehen. Bei der in Fig. 1 oberen Speichervorrichtung E sind die Fadenumlenkelemente in der Eintragstellung II, in der sie einen im wesentlichen gestreckten Fadenverlauf definieren. Die Fadenklemme 3 ist geschlossen. Die Fadenklemme 4 ist geöffnet. Die Eintragvorrichtung M hat den Schußfaden W1 soeben in das Webfach S eingetragen. Die gesteuerte Fadenbremse 5 (falls vorhanden) hat während des Eintragvorganges gebremst, um einen vorbestimmten, gegebenenfalls über den Eintragvorgang variierenden Bremseffekt zu bewirken. Die in Fig. 1 untere Speichervorrichtung E hat hingegen den anderen Schußfaden W2 durch Verstellen der verstellbaren Umlenkelemente A bis D in die Speicherstellung I in einen zick-zack-förmigen Fadenverlauf gebracht, um die für einen Eintrag benötigte Fadenlänge zu speichern. Dabei ist die Fadenklemme 4 geschlossen und die Fadenklemme 3 geöffnet, um den Schußfaden W2 vom Fadenvorrat 2 abzuziehen. Zweckmäßigerweise sind die verstellbaren Fadenumlenk-elemente A bis E sukzessive und beginnend mit dem Fadenumlenkelement D bzw. C und D aus der Eintragstellung II in die Speicherstellung I verstellt worden.In each storage device E, a plurality of stationary thread deflecting elements 6 1 to 6 5 are arranged one behind the other in the direction of entry of each weft thread W1, W2. On the side of the weft thread W1 or W2 opposite the stationary thread deflecting elements 6 1 to 6 5 , a plurality of thread deflecting elements A to D adjustable transversely to the longitudinal direction of the thread are provided. In the upper storage device E in FIG. 1, the thread deflecting elements are in the entry position II, in which they define an essentially stretched thread course. The thread clamp 3 is closed. The thread clamp 4 is open. The entry device M has just entered the weft W1 into the shed S. The controlled thread brake 5 (if present) has braked during the insertion process in order to bring about a predetermined braking effect which may vary via the insertion process. The lower storage device E in FIG. 1, on the other hand, has brought the other weft thread W2 by moving the adjustable deflecting elements A to D into the storage position I in a zigzag-shaped thread course in order to store the thread length required for an entry. The thread clamp 4 is closed and the thread clamp 3 is opened in order to pull off the weft thread W2 from the thread supply 2. The adjustable thread deflecting elements A to E are expediently shifted from the entry position II into the storage position I, starting with the thread deflecting element D or C and D.

Jedes verstellbare Fadenumlenkelement A bis D besitzt einen eigenen Antrieb 7A, 7B oder es ist für mehrere verstellbare Fadenumlenkelement ein gemeinsamer Antrieb 7C,D, wie für die beiden Fadenumlenkelemente C, D, vorgesehen.Each adjustable thread deflecting element A to D has its own drive 7 A , 7 B, or a common drive 7 C, D is provided for several adjustable thread deflecting element, as for the two thread deflecting elements C, D.

Zusätzlich ist erfindungsgemäß in jede Speichervorrichtung E ein Fadenspannungsdämpfer Z eingegliedert, der bei der in Fig. 1 gezeigten Ausführungsform aus dem verstellbaren Fadenumlenkelement A, dem stationären Fadenumlenkelement 62, und einem Vorspannelement 8, hier z.B. einer Zugfeder (bzw. dem Antrieb 7A) besteht. Mit dem Vorspannelement 8 bzw. dem Antrieb 7A ist am an sich frei in Richtung auf seine Eintragstellung II verstellbaren Fadenumlenkelement A eine zu seiner Speicherstellung I gerichtete elastische Dämpfkraft R wirksam. In dem Fadenspannungsdämpfer Z ist das verstellbare Fadenumlenkelement A ein mechanisches Dämpfelement N, das sich in der Ausführungsform von Fig. 1 vom jeweiligen Schußfaden W1, W2 dämpfend in die Eintragstellung II rückstellen läßt.In addition, according to the invention, a thread tension damper Z is incorporated into each storage device E, which in the embodiment shown in FIG. 1 consists of the adjustable thread deflection element A, the stationary thread deflection element 6 2 , and a pretensioning element 8, here for example a tension spring (or the drive 7 A ) consists. With the biasing element 8 or the drive 7 A , an elastic damping force R directed towards its storage position I is effective on the thread deflecting element A which is freely adjustable in the direction of its entry position II. In the thread tension damper Z, the adjustable thread deflection element A is a mechanical damping element N, which can be reset in the embodiment of FIG. 1 by the respective weft thread W1, W2 in a damping manner into the entry position II.

Zum Eintragen des in der unteren Speichervorrichtung E gespeicherten Schußfadens W2 in das Webfach S wird zunächst die Fadenklemme 3 geschlossen und die Fadenklemme 4 geöffnet. Dann werden die verstellbaren Fadenumlenkelemente A bis D sukzessive und beginnend mit dem Fadenumlenkelement D bzw. C und D gemeinsam aus der Speicherstellung I in die Eintragstellung II verstellt, und zwar mittels ihrer Antriebe 7A bis 7C, D, wobei die Eintragvorrichtung M den Schußfaden W2 in das Webfach S einzutragen beginnt. In der Annahme, daß in Fig. 1 das Vorspannelement 8 die Dämpfkraft R erzeugt, gibt der Antrieb 7A das Fadenumlenkelement A frei, sobald ein überwiegender Teil der gespeicherten Fadenlänge des Schußfadens W2 eingetragen ist. Wenn das Eintragende naht, übt die Fadenspannung eine Fadenkraft F auf das Fadenumlenkelement A aus, die in Richtung zu dessen Eintragstellung II wirkt und die Dämpfkraft R überwindet und das Fadenumlenkelement A zur Eintragstellung II verstellt. Dabei wird Energie aufgezehrt, so daß der an sich zu erwartende Streckschlag oder Peitscheneffekt im Faden am Eintragende, verursacht durch das momentane Abstoppen des in der Fadenklemme 2 festgelegten, von der Webmaschine abgezogenen Schußfadens W2, weitgehend gemildert oder eliminiert wird. Bei einer Projektil- oder Greiferwebmaschine L wird das schließlich in die Eintragstellung II verstellte Fadenumlenkelement A durch die bis zum Schließen der Fadenklemme 4 wirksame Zugkraft im Schußfaden positioniert gehalten. Gegebenenfalls erzeugt dann der Antrieb 7A eine Haltekraft für das Fadenumlenkelement A, obwohl dies bei diesen Webmaschinentypen nicht unbedingt erforderlich ist. Bei einer Düsenwebmaschine F ist es hingegen vorteilhaft, das gegen die Dämpfkraft R in die Eintragstellung II verstellte Fadenumlenkelement am Eintragende gegen eine Bewegungsumkehr unter der Dämpfkraft R zu hindern, um den eingetragenen Schußfaden nicht zurückzuziehen. Dafür kann eine mechanische Fangvorrichtung (nicht gezeigt) oder der Antrieb 7A dienen.To insert the weft thread W2 stored in the lower storage device E into the shed S, the thread clamp 3 is first closed and the thread clamp 4 opened. Then the adjustable thread deflecting elements A to D are successively and starting with the thread deflecting element D or C and D jointly adjusted from the storage position I to the entry position II, by means of their drives 7 A to 7 C, D , the insertion device M being the weft thread W2 begins to enter in the shed S. Assuming that the pretensioning element 8 generates the damping force R in FIG. 1, the drive 7 A releases the thread deflecting element A as soon as a predominant part of the stored thread length of the weft thread W2 has been entered. When the insertion end approaches, the thread tension exerts a thread force F on the thread deflection element A, which acts in the direction of its insertion position II and overcomes the damping force R and adjusts the thread deflection element A to the insertion position II. Energy is thereby consumed so that the expected stretching or whip effect in the thread at the end of the entry, caused by the momentary stopping of the weft thread W2 defined in the thread clamp 2 and pulled off by the weaving machine, is largely mitigated or eliminated. In the case of a projectile or rapier weaving machine L, the thread deflecting element A which is finally adjusted to the entry position II is held in position in the weft thread by the tensile force which is effective until the thread clamp 4 closes. If necessary, the drive 7 A then generates a holding force for the thread deflecting element A, although this is not absolutely necessary in these types of weaving machine. In the case of a jet weaving machine F, on the other hand, it is advantageous to prevent the thread deflecting element, which has been adjusted into the entry position II against the damping force R, at the end of the entry against a reversal of movement under the damping force R, in order not to retract the weft thread. A mechanical safety device (not shown) or the drive 7 A can be used for this.

Die Dämpfkraft R ist kleiner als die vom Faden ausgeübte Fadenkraft am Fadenumlenkelement A. Wird die Dämpfkraft R durch den Antrieb 7A erzeugt, dann ist sie ebenfalls niedriger als die Fadenkraft, so daß der Faden in der Lage ist, das Fadenumlenkelement A unter der Dämpfwirkung in die Eintragstellung II zu verstellen.The damping force R is less than the thread force exerted by the thread on the thread deflecting element A. If the damping force R is generated by the drive 7 A , it is also lower than the thread force, so that the thread is able to force the thread deflecting element A under the damping effect to adjust to entry position II.

Alternativ ist es möglich, nicht eine elastische Dämpfkraft R an dem das Dämpfelement N bildenden, verstellbaren Fadenumlenkelement A zu erzeugen, sondern das Fadenumlenkelement A durch den Antrieb 7A zwangsweise mit einer Dämpfverzögerung unter Anlage des Schußfadens in die Eintragstellung II zu verstellen. Dämpfverzögerung bedeutet, daß das Fadenumlenkelement A langsamer zwangsweise in die Eintragstellung verstellt wird, als es der ungedämpften Fadeneintraggeschwindigkeit gegen Eintragende entspricht, so daß der Schußfaden mit einer Verzögerung schließlich den gestreckten Fadenverlauf erreicht und an der geschlossenen Fadenklemme 3 gestoppt wird und bis dahin zumindest ein Teil der im Schußfaden enthaltenen kinetischen Energie an den Fadenumlenkelementen A und 62 aufgezehrt worden ist. Es erfolgt auf diese Weise gegen Eintragende eine positive Fadenlieferung unter Einwirkung der zwangsweise verzögerten Rückstellbewegung des Fadenumlenkelementes A.Alternatively, it is possible not to generate an elastic damping force R on the adjustable thread deflecting element A forming the damping element N, but rather to forcefully adjust the thread deflecting element A by the drive 7 A with a damping delay by engaging the weft thread in the insertion position II. Damping delay means that the thread deflecting element A is forced into the entry position more slowly than it corresponds to the undamped thread insertion speed towards the end of the entry, so that the weft thread finally reaches the stretched thread course with a delay and is stopped at the closed thread clamp 3 and until then at least part of it the kinetic energy contained in the weft thread on the thread deflecting elements A and 6 2 has been consumed. In this way, a positive thread delivery takes place against the end of the input, under the action of the forcibly delayed return movement of the thread deflecting element A.

Während des Eintragvorgangs des Schußfadens W2 ist in der in Fig. 1 oberen Speichervorrichtung E bei mittlerweile geschlossener Fadenklemme 4 und geöffneter Fadenklemme 3 wieder ein Speichervorgang durchgeführt worden, bei dem die Fadenumlenkelemente A bis D, d.h. auch das Fadenumlenkelement A, von ihren Antrieben in die Speicherstellung I verstellt worden sind. During the insertion process of the weft thread W2 is in the upper storage device in FIG. 1 E with thread clamp 4 now closed and thread clamp open 3 again a storage process was carried out in which the thread deflecting elements A to D, i.e. also the thread deflecting element A, from their drives have been adjusted to storage position I.

In Fig. 2 ist das verstellbare Fadenumlenkelement B ein Schwenkhebel 9, der an einer Antriebswelle 10 des Antriebes 7B angebracht ist. Der Antrieb 7B ist ein Drehantrieb G, z.B. ein Schrittmotor, ein Drehmagnet oder ein Elektromotor. Der Antrieb 7B ist z.B. in der Lage, Drehmomente +TB und -TB in beiden Verstellrichtungen zu erzeugen. Um die in der Speichervorrichtung zu speichernde Fadenlänge einzustellen, kann die Länge des Schwenkhebels 9 (Doppelpfeil 12) und damit die Höhenposition des Antriebes 7B verändert werden und/oder der Schwenkwinkel des Schwenkhebels 9 zwischen der Eintragstellung II und der Speicherstellung I bzw. I'. Zum Angriff am Faden trägt der Schwenkhebel 9 zweckmäßigerweise eine Fadenöse 11. Alternativ könnte der Schwenkhebel 9 als gerader Stab ausgebildet sind. Wird das Fadenumlenkelement B als Komponente des Fadenspannungsdämpfers Z verwendet, dann könnte das Vorspannelement 8 am Schwenkhebel 9 angreifen. Der Antrieb 7B bräuchte dann ggfs. nur das Drehmoment +TB zu erzeugen, hingegen nicht das Drehmoment -TB. Ist das Fadenumlenkelement B nicht Teil des Fadenspannungsdämpfers Z, dann könnte der Antrieb 7B nur in einer Verstellrichtung und gegen eine Rückstellfeder (nicht gezeigt) arbeiten, die für die Verstellung in der nicht angetriebenen Richtung verantwortlich ist.2, the adjustable thread deflecting element B is a pivot lever 9 which is attached to a drive shaft 10 of the drive 7B. The drive 7B is a rotary drive G, for example a stepper motor, a rotary magnet or an electric motor. The drive 7 B is able, for example, to generate torques + T B and -T B in both adjustment directions. In order to set the thread length to be stored in the storage device, the length of the swivel lever 9 (double arrow 12) and thus the height position of the drive 7B can be changed and / or the swivel angle of the swivel lever 9 between the entry position II and the storage position I or I '. To engage the thread, the pivot lever 9 expediently carries a thread eyelet 11. Alternatively, the pivot lever 9 could be designed as a straight rod. If the thread deflection element B is used as a component of the thread tension damper Z, then the pretensioning element 8 could act on the swivel lever 9. The drive 7B may then only need to generate the torque + T B , but not the torque -T B. If the thread deflection element B is not part of the thread tension damper Z, then the drive 7 B could only work in one direction of adjustment and against a return spring (not shown), which is responsible for the adjustment in the non-driven direction.

Entsprechend der Ausführungsform in Fig. 1 sind dem verstellbaren Fadenumlenkelement B in Fig. 2 die beiden stationären Fadenumlenkelemente 62 und 63, zweckmäßigerweise jeweils Fadenösen, zugeordnet. Es wäre jedoch auch denkbar, die stationären Fadenumlenkelemente 62 und 63 wegzulassen und das nächstfolgende verstellbare Fadenumlenkelement C aus der gezeigten Eintragstellung II gegensinnig (gestrichelter Pfeil) zum Fadenumlenkelement B zu verstellen, um den zick-zack-förmigen Fadenverlauf zu bilden. Weiterhin könnten, um die Speicherkapazität der Speichervorrichtung zu steigern, zwischen jeweils zwei gegensinnig verstellbaren Fadenumlenkelementen B, C (Fig. 2) zusätzlich die stationären Fadenumlenkelemente 62 und 63 vorgesehen sein.According to the embodiment in FIG. 1, the adjustable thread deflecting element B in FIG. 2 is assigned the two stationary thread deflecting elements 6 2 and 6 3 , expediently thread eyelets in each case. However, it would also be conceivable to omit the stationary thread deflecting elements 6 2 and 6 3 and to adjust the next following adjustable thread deflecting element C from the shown entry position II in the opposite direction (dashed arrow) to the thread deflecting element B in order to form the zigzag-shaped thread course. Furthermore, in order to increase the storage capacity of the storage device, the stationary thread deflecting elements 6 2 and 6 3 could additionally be provided between two mutually adjustable thread deflecting elements B, C (FIG. 2).

In Fig. 3 sind die verstellbaren Fadenumlenkelemente A bis C linear bewegliche Stäbe 9", zweckmäßigerweise ausgestattet mit Fadenösen, die durch ihre als Linearantriebe H ausgebildeten Antriebe 7A bis 7C verstellt werden, und zwar entweder in beiden Verstellrichtungen oder nur in Stellrichtung zur Speicherstellung entgegengesetzt zu einer nicht gezeigten Rückstellfeder. Bei der Ausführungsform in Fig. 3 könnten gleichsinnig verstellbare Fadenumlenkelemente B, C jeweils mit einem dazwischenliegenden stationären Fadenumlenkelement 63 vorgesehen sein, oder nur jeweils paarweise gegensinnig verstellbare Fadenumlenkelemente A, B, oder sogar gegensinnig in ihre Speicherstellungen verstellbare Fadenumlenkelemente A und B mit je einem dazwischenliegenden stationären Fadenumlenkelement 62. Die gegensinnig verstellbaren Fadenumlenkelemente könnten auch nur als Fadenzubringer zu Fadenhaltern dienen, bespielsweise gemäß Fig. 4.In Fig. 3, the adjustable thread deflecting elements A to C are linearly movable rods 9 ", expediently equipped with thread eyelets which are adjusted by their drives 7 A to 7 C designed as linear drives H, either in both adjustment directions or only in the adjustment direction for the storage position 3, thread-deflecting elements B, C which can be adjusted in the same direction could each be provided with an intermediate stationary thread-deflecting element 6 3 , or only thread-deflecting elements A, B, which can be adjusted in pairs in opposite directions, or even adjustable in opposite directions into their storage positions Thread deflecting elements A and B, each with an intermediate stationary thread deflecting element 6 2. The oppositely adjustable thread deflecting elements could also only serve as thread feeders to thread holders, for example according to FIG.

In Fig. 4 ist ein Detail einer weiteren Ausführungsform einer Speichervorrichtung gezeigt. Der Fadenverlauf in der Speicherstellung wird durch stationäre Fadenhalter 13 definiert, denen jeweils ein zum Speichern verstellbares Fadenumlenkelement B als Fadenzuführer zugeordnet ist. Den Fadenhaltern 13 könnten querversetzte stationäre Fadenumlenkelemente, analog zu den Fadenumlenkelementen 61 bis 65 in Fig. 1, zugeordnet sein. Alternativ könnten die Fadenhalter 13 zueinander versetzt aufgereiht werden zusammen mit gegensinnig arbeitenden verstellbaren Fadenumlenkelementen als Fadenzubringer.4 shows a detail of a further embodiment of a memory device. The course of the thread in the storage position is defined by stationary thread holders 13, each of which is assigned a thread deflection element B, which is adjustable for storage, as a thread feeder. Transversely displaced stationary thread deflection elements could be assigned to the thread holders 13, analogously to the thread deflection elements 6 1 to 6 5 in FIG. 1. Alternatively, the thread holders 13 could be lined up offset from one another together with adjustable thread deflecting elements working in opposite directions as thread feeders.

In Fig. 4 weist jeder Fadenhalter 13 einen verstellbaren Fadenfänger 14, gegebenenfalls in Richtung auf eine Fangstellung beaufschlagt durch eine Feder 15, und Widerlager 17 sowie einen Auslöseantrieb 16 auf. Das verstellbare Fadenumlenkelement B wird seitlich am Fadenhalter 13 vorbeibewegt, so daß der mitgebrachte Schußfaden W1 in das Widerlager 17 eintritt, unter dem Fadenfänger 14 durchgleitet, und beim Zurückbewegen des verstellbaren Fadenumlenkelementes B festgehalten beibt. Zum Eintrag wird zum gegebenen Zeitpunkt der Auslöseantrieb 16 angesteuert, der den Fanghaken 14 gegen die Kraft der Feder 15 verstellt, so daß dieser am Widerlager 17 den gefangenen Schußfaden W abstreift und dieser zum Eintrag frei kommt. Bei der Speichervorrichtung in Fig. 4 steht im Fadenspannungsdämpfer (nicht gezeigt) das verstellbare Fadenumlenkelement, z.B. B, beim Widerlager 17 bereit, um den freikommenden Schußfaden aufzunehmen und diesen bis zur Eintragstellung abdämpfen.In Fig. 4, each thread holder 13 has an adjustable thread catcher 14, if necessary in the direction of a catch position acted upon by a spring 15, and abutment 17 and a trigger drive 16. The adjustable thread deflection element B is moved laterally past the thread holder 13 so that the weft thread brought along W1 enters the abutment 17, slides under the thread catcher 14, and at Moving back the adjustable thread deflection element B held there. To the Entry is triggered at the given time the trigger drive 16, the Catch hook 14 adjusted against the force of the spring 15 so that it is on the abutment 17th strips off the caught weft W and this is released for entry. In the 4 is in the thread tension damper (not shown) adjustable thread deflecting element, e.g. B, at abutment 17 ready to release Pick up the weft thread and dampen it until the entry position.

In Fig. 5 ist der Speichervorrichtung E, in der der Fadenspannungsdämpfer Z die beiden in Eintragrichtung ersten, verstellbaren Fadenumlenkelemente A und B enthält, stromauf der Fadenklemme 3 ein Fadenliefergerät 18 vorgesetzt, das den Schußfaden W1 vom Fadenvorrat 1 abzieht und auf einem Speicherkörper 20 zum Abzug mit im wesentlichen gleichbleibender Fadenspannung bereithält. Das Fadenliefergerät 18 ist von konventioneller Bauweise und besitzt ein drehantreibbares Aufwickelelement 19 zum Aufwickeln des Fadens auf den Speicherkörper 20 sowie gegebenenfalls eine Abzugsbremse 21.5, the storage device E in which the thread tension damper Z is the two contains first, adjustable thread deflecting elements A and B in the entry direction, upstream of the thread clamp 3, a thread delivery device 18, which carries the weft W1 withdraws from the thread supply 1 and on a storage body 20 for withdrawal provides substantially constant thread tension. The thread delivery device 18 is of conventional design and has a winding element which can be driven in rotation 19 for winding the thread on the storage body 20 and optionally one Trigger brake 21.

Der Speichervorrichtung E in Fig. 6 für den Schußfaden W1 ist stromauf der Fadenklemme 3 ebenfalls ein Fadenliefergerät 18' vorgesetzt, das den Faden vom Fadenvorrat 1 abzieht und auf einem Speicherkörper 20' in nebeneinanderliegenden Windungen zum Abzug mit im wesentlichen konstantem Spannungsniveau bereithält. Das Fadenliefergerät 18' ist ein sogenanntes Meßliefergerät mit einer Stopvorrichtung 22, die die jeweils abzuziehende Fadenlänge genau bemißt. In der Speichereinrichtung C ist das in Eintragrichtung erste verstellbare Fadenumlenkelement A, das durch die elastische Vorspannkraft beaufschlagt ist, Teil des Fadenspannungsdämpfers Z.The storage device E in Fig. 6 for the weft W1 is upstream of the thread clamp 3 also a thread delivery device 18 'in front of the thread from the thread supply 1 subtracts and on a storage body 20 'in adjacent turns ready for deduction with a substantially constant voltage level. The Thread delivery device 18 'is a so-called measuring delivery device with a stop device 22, which precisely measures the thread length to be subtracted. In the storage device C is the first adjustable thread deflection element A in the direction of entry, which by the elastic pretensioning force is applied, part of the thread tension damper Z.

In Fig. 7 werden die beiden verstellbaren Fadenumlenkelemente C, D von einem gemeinsamen Schwenkhebel 9' gebildet, der zweischenkelig ausgebildet und an der Welle 10 des Antriebs 7C, D angebracht ist. Beiderseits des Schwenkhebels 9' sowie zwischen seinen Schenkeln ist je ein stationäres Fadenumlenkelement 63, 64, und 65 vorgesehen. Dem Antrieb 7C, D, der ein Schrittmotor, ein Elektromotor oder ein Drehmagnet G sein kann, ist eine elektrische bzw. elektronische Steuervorrichtung P zugeordnet, über die die Stellbewegungen des Schwenkhebels 9' steuerbar sind. Zweckmäßigerweise führt der Antrieb 7C, D Stellbwegungen in beiden Stellrichtungen (Drehmomente TC, D und -TC, D) aus. Es wäre aber auch denkbar, mit dem Antrieb 7 C, D nur die Stellbewegung zur Speicherstellung II gegen eine nicht gezeigte Rückstellfeder auszuführen.In Fig. 7, the two adjustable thread deflecting elements C, D are formed by a common pivot lever 9 ', which is designed with two legs and is attached to the shaft 10 of the drive 7 C, D. A stationary thread deflecting element 6 3 , 6 4 , and 6 5 is provided on each side of the pivot lever 9 'and between its legs. The drive 7 C, D , which can be a stepper motor, an electric motor or a rotating magnet G, is assigned an electrical or electronic control device P, via which the adjusting movements of the pivot lever 9 'can be controlled. The drive 7 C, D expediently performs adjustment movements in both adjustment directions (torques T C, D and -T C, D ). However, it would also be conceivable to use the drive 7 C, D only to perform the actuating movement to the storage position II against a return spring, not shown.

Die vorerwähnte Ausführungsform könnte auch als Teil des Fadenspannungsdämpfers Z, analog zur Fig. 5, für die verstellbaren Fadenumlenkelemente A, B verwendet werden. In diesem Fall würde die Steuervorrichtung P wie in Fig. 7A angedeutet, arbeiten.The aforementioned embodiment could also be part of the thread tension damper Z, analogous to FIG. 5, used for the adjustable thread deflecting elements A, B. become. In this case, the control device P would operate as indicated in FIG. 7A.

Auf der vertikalen Achse in Fig. 7A ist der Beaufschlagungsstrom V bzw. der Stellweg S des Schwenkhebels 9' zwischen der Eintragstellung II und der Speicherstellung I aufgetragen. Die horizontale Achse ist beispielsweise eine Zeitachse oder repräsentiert den Drehwinkel der Hauptwelle der Webmaschine. Die ausgezogene Kurve 23 repräsentiert die Strombeaufschlagung des Antriebs während eines Speichervorganges und eines anschließenden Eintragvorganges. Die gestrichelte Kurve 24 repräsentiert die Stellbewegung über einen Speichervorgang und den anschließenden Eintragvorgang. Entsprechend der Kurve 23 wird die Strombeaufschlagung zunächst bis auf einen Maximalwert VT eingesteuert, um die Fadenumlenkelemente A, B entsprechend der Kurve 24 in die Speicherstellung I zu verstellen. Sobald der Eintragvorgang abläuft, wird vor dem Eintrabende die Strombeaufschlagung reduziert auf einen im wesentlichen konstanten Haltestrom VR zum Erzeugen der Dämpfkraft R. Unter der Fadenkraft werden die Fadenumlenkelemente A, B, gegen die Dämpfkraft R dämpfend bis in die Eintragstellung II verstellt.On the vertical axis in FIG. 7A, the admission current V or the adjustment path S of the swivel lever 9 'between the entry position II and the storage position I is plotted. The horizontal axis is, for example, a time axis or represents the angle of rotation of the main shaft of the weaving machine. The solid curve 23 represents the current applied to the drive during a storage process and a subsequent entry process. The dashed curve 24 represents the actuating movement via a storage process and the subsequent entry process. According to curve 23, the current application is first controlled up to a maximum value V T in order to adjust the thread deflection elements A, B according to curve 24 into the storage position I. As soon as the insertion process takes place, the current application is reduced to an essentially constant holding current V R to generate the damping force R before the end of the entry. Under the thread force, the thread deflection elements A, B, are damped against the damping force R until the insertion position II.

In Fig. 8 ist eine pneumatische Ausführungsform eines Linearantriebes H für die verstellbaren Fadenumlenkelemente C, D in zwei Ansichten gezeigt. In einem Gehäuse 25 ist ein Zylinder 26 geformt, der über einen Einlaß 27 mit Druckluft beaufschlagbar ist. Dem Einlaß 27 ist ein nicht gezeigtes Steuerventil vorgesetzt, das entweder den Zylinder 26 mit einer Druckquelle verbindet oder direkt bzw. gedrosselt entlastet. Im Zylinder 26 ist ein Kolben 28 abgedichtet verschieblich, der einen Längsschlitz bzw. eine Längsnut 30 für ein Eingriffselement 29 besitzt, das den Hubweg des Zylinders 28 begrenzt und für seine Drehsicherung verantwortlich ist. Der Kolben 28 ist durch einen Stab 9" verlängert, der eine Gabel 32 trägt. Eine Rückstellfeder 31 wirkt entgegen der Druckbeaufschlagung des Kolbens 28 im Zylinder 26. Am Gehäuse 25 können ferner die stationären Fadenumlenkelemente 63, 64, 65 angeordnet sein, die den verstellbaren Fadenumlenkelemente C, D zugeordnet sind, um insgesamt fünf Umlenkstellen für den Faden zu definieren.8 shows a pneumatic embodiment of a linear drive H for the adjustable thread deflecting elements C, D in two views. A cylinder 26 is formed in a housing 25 and can be pressurized with compressed air via an inlet 27. The inlet 27 is preceded by a control valve, not shown, which either connects the cylinder 26 to a pressure source or unloads directly or throttled. In the cylinder 26, a piston 28 can be moved in a sealed manner and has a longitudinal slot or groove 30 for an engagement element 29, which limits the stroke of the cylinder 28 and is responsible for securing it against rotation. The piston 28 is extended by a rod 9 "which carries a fork 32. A return spring 31 counteracts the pressurization of the piston 28 in the cylinder 26. The stationary thread deflection elements 6 3 , 6 4 , 6 5 can also be arranged on the housing 25, which are assigned to the adjustable thread deflection elements C, D in order to define a total of five deflection points for the thread.

Verbindet das nicht dargestellte Steuerventil zur Entlastung den Zylinder 26 über eine Drosselstelle z.B. mit der Außenatmosphäre, dann wird durch das gedrosselte Abströmen der Druckluft aus dem Zylinder 26 bereits die elastische Dämpfkraft R erzeugt, falls die verstellbaren Fadenumlenkelemente, hier C, D, Teil des Fadenspannungsdämpfers Z sind. Alternativ läßt sich die Dämpfung durch das Zusammenspiel zwischen der Rückstellfeder 31 und einer zwangsweisen Stellbewegung zur-Eintragstellung erzeugen.Connects the control valve, not shown, to relieve the cylinder 26 via a Throttle point e.g. with the outside atmosphere, then through the throttled outflow the compressed air from the cylinder 26 already produces the elastic damping force R, if the adjustable thread deflection elements, here C, D, part of the thread tension damper Z are. Alternatively, the damping can be achieved through the interaction between the return spring 31 and a forced actuating movement for the entry position produce.

Anhand Fig. 9 wird die Funktion der Speichervorrichtung E von Fig. 1 erläutert. Auf der vertikalen Achse sind die Stellwege der verstellbaren Fadenumlenkelemente A bis D zwischen der Eintragstellung und der Speicherstellung und umgekehrt aufgetragen. Die horizontale Achse ist eine Zeitachse oder repräsentiert den Drehwinkel der Hauptwelle der Webmaschine, Ausgehend von der Eintragstellung I werden sukzessive die verstellbaren Fadenumlenkelemente in ihre Speicherstellungen I verstellt, und zwar beginnend mit dem Fadenumlenkelement D. Dazu werden die Antriebsdrehmomente TD bis TA etwa analog zu Fig. 2 erzeugt. Sobald die Fadenumlenkelemente D bis A ihre Speicherstellungen I erreicht haben, ist der Schußfaden mit zick-zack-förmigem Fadenverlauf gespeichert. Zum Zeitpunkt X beginnt der Eintrag, wobei, gegebenenfalls geringfügig voreilend, das Fadenumlenkelement D durch die Verstelikraft -TD in Richtung zur Eintragstellung II als erstes verstellt wird, und sukzessive auch die weiteren verstellbaren Fadenumlenkelemente C, B, und zwar zweckmäßigerweise mit einer zeitlichen Überlappung. Das dem Fadenspannungsdämpfer Z angehörende Fadenumlenkelement A wird schließlich gegen Eintragende durch die Fadenkraft F dämpfend bis in die Eintragstellung II verstellt, weil zumindest über einen beträchtlichen Teil des Stellweges die Dämpfkraft R wirksam ist. Am Eintragende Y hat das Fadenumlenkelement A seine Eintragstellung II erreicht (gestreckter Fadenverlauf). Es wird dann entweder durch die Fadenkraft F oder durch eine Haltekraft -TA vom Antrieb 7A an einer Bewegungsumkehr unter der nach wie vor wirkenden Dämpfkraft R gehindert. Durch die Verzögerung der Bewegung des Fadenumlenkelementes A wird im Faden kinetische Energie aufgezehrt, so daß sich ein am Eintragende zu befürchtender Streckschlag bzw. Peitscheneffekt abgeschwächt oder nicht mehr auswirkt.The function of the memory device E from FIG. 1 is explained with reference to FIG. 9. The adjustment paths of the adjustable thread deflection elements A to D between the entry position and the storage position and vice versa are plotted on the vertical axis. The horizontal axis is a time axis or represents the angle of rotation of the main shaft of the weaving machine. Starting from the entry position I, the adjustable thread deflecting elements are successively adjusted to their storage positions I, starting with the thread deflecting element D. For this purpose, the drive torques T D to T A become approximately analog to Fig. 2 generated. As soon as the thread deflecting elements D to A have reached their storage positions I, the weft thread is stored with a zigzag thread course. The entry begins at time X, the thread deflecting element D being adjusted first by the adjusting force -T D in the direction of the entry position II, and successively also the further adjustable thread deflecting elements C, B, and expediently with a temporal overlap , The thread deflection element A belonging to the thread tension damper Z is finally adjusted against the end of the insertion by the thread force F to the insertion position II because the damping force R is effective at least over a considerable part of the travel. At the entry end Y, the thread deflecting element A has reached its entry position II (stretched thread course). It is then prevented either by the thread force F or by a holding force -T A from the drive 7 A from reversing the movement under the damping force R which still acts. By delaying the movement of the thread deflecting element A, kinetic energy is consumed in the thread, so that a stretching stroke or whip effect to be feared at the end of the insertion is weakened or no longer has an effect.

Bei einer Ausführungsform, bei der das verstellbare Fadenumlenkelement A des Fadenspannungsdämpfers Z mit einer Verzögerung zwangsweise aus der Speicherstellung I in die Eintragstellung II verstellt wird, ergibt sich ein ähnlicher Geschwindigkeitsverlauf wie in Fig. 9 ganz rechts angedeutet. Das Fadenumlenkelement A wird dann zumindest über den größten Teil seines Stellweges durch die Antriebskraft -TA verstellt, so daß der eingetragene Faden exakt dem Geschwindigkeitsprofil zu folgen hat und dadurch Energie abgibt.In an embodiment in which the adjustable thread deflecting element A of the thread tension damper Z is forcibly moved from the storage position I to the entry position II with a delay, a speed curve similar to that indicated in FIG. 9 on the far right results. The thread deflecting element A is then adjusted at least over the largest part of its travel range by the driving force -T A , so that the thread entered has to follow the speed profile exactly and thereby emits energy.

Fig. 10 verdeutlicht schematisch die Fadenkraft bzw. Fadenspannung über einen Eintrag. Am Eintragbeginn X steigt die Fadenspannung entsprechend der Kurve 33 stark bis auf einen Maximalwert an und verbleibt dann in etwa konstant, bis sie beim Eintragende Y nochmals extrem anwächst, und zwar im Bereich K aufgrund des Streckschlages bzw. Peitscheneffekts beim Abstoppen des Fadens. Durch die Einwirkung des Fadenspannungsdämpfers Z wird jedoch der Kurvenbereich K gemildert oder gänzlich beseitigt. Gestrichelt ist bei Q angedeutet, wie beispielsweise bei einer Greiferschützenwebmaschine aufgrund der Übergabe vom Bringergreifer zum Nehmergreifer die Fadenspannung zwischzeitlich vorübergehend abfällt und wieder ansteigt. Auch in diesem Fall wird der schädliche extreme Spannungsanstieg K gegen Eintragende gemildert oder weitgehend beseitigt.10 schematically illustrates the thread force or thread tension via an entry. At the start of entry X, the thread tension increases sharply in accordance with curve 33 up to a maximum value and then remains approximately constant until it ends at the entry Y grows again extremely, namely in area K due to the stretching impact or whip effect when stopping the thread. By the action of the thread tension damper Z, however, the curve area K is alleviated or completely eliminated. Dashed lines indicate at Q, such as in a rapier weaving machine due to the transfer from the bringer gripper to the slave gripper the thread tension temporarily drops and rises again. In this case too, the harmful extreme voltage rise K becomes against the entry mitigated or largely eliminated.

Wenn eine nach dem Eintrag in eine Projektil-Webmaschine, z.B. wegen des Streckschlags, benötigte zusätzliche Fadenlänge trotz des üblicherweise vorgesehenen Aufnehmerarms zu groß sein sollte, können beide Fadenklemmen 3, 4 geöffnet werden, damit Faden direkt vom Vorrat 1, 2 oder deren Liefergerät 18 nachgezogen werden kann. Dann kann es von Vorteil sein, am Eintragende die gesteuerte oder passive Fadenbremse 5 zur Fadenkontrolle zu nutzen.If one after the entry in a projectile weaving machine, e.g. because of the stretch stroke, required additional thread length despite the usually provided Should be too large, both thread clamps 3, 4 can be opened, so that thread is drawn directly from the supply 1, 2 or their delivery device 18 can. Then it can be advantageous to use the controlled or passive one at the end of the entry To use thread brake 5 for thread control.

Claims (14)

  1. A storage device (E) for the weft thread (W1, W2) of a weaving machine (L), particularly a jet-weaving, gripper-weaving or projectile-weaving machine, having a plurality of thread diverting elements (A to D, 61 to 65), which are arranged along the thread path from a thread supply (1, 2) to a picking device (M) of the weaving machine and between thread brakes (3, 4, 5) located up and downstream, and of which at least one thread diverting element (A to D) may be adjusted transversely to the longitudinal thread direction relative to at least one further thread diverting element (61 to 65; D to A) between a picking position (II) with a substantially extended thread course and a storage position (I) with a substantially zigzagging thread course, and having a regulating device which has at least one drive (7A to 7D) and is in driving communication with the adjustable thread diverting element, characterised in that, in the storage device (E), at least one adjustable thread diverting element (A, B) is constructed as a mechanical damping element (N) of a thread tension damper (Z) for the weft thread (W1, W2), which mechanical damping element may be reset in the direction of its picking position (II) in damped manner.
  2. A storage device according to Claim 1, characterised in that, upon being reset to the picking position (II), the adjustable thread diverting element (A, B) is acted upon by a resilient damping force (R), e.g. of a spring, in opposition to the thread force (F) resulting from the thread tension.
  3. A storage device according to Claim 1, characterised in that the adjustable thread diverting element (A, B) may be compulsorily reset by means of the drive (7A, 7B) with a predetermined damping delay in the direction of the picking position (II), preferably by means of the drive (7A, 7B).
  4. A storage device according to Claim 1, characterised in that the thread tension damper (Z) comprises the first thread diverting element (A, B), as seen in the thread picking direction, or a plurality of thread diverting elements (A, B) initially provided in the thread picking direction.
  5. A storage device according to Claim 2 or 3, characterised in that the extent and/or the course of the damping force (R) or the damping delay may be adjusted or altered by way of the regulating path of the thread diverting element (A, B).
  6. A storage device according to Claim 2, characterised in that the thread diverting element (A, B) may be at least temporarily locked approximately in the picking position (II) to prevent a reverse movement in the direction of the storage position (I), preferably at the end of the picking procedure and mechanically, pneumatically, electrically or electromagnetically.
  7. A storage device according to Claim 1, characterised in that the thread supply is arranged on a storage body (20, 20') of a thread delivery device (18, 18') which automatically maintains a predetermined supply quantity, preferably on a measuring delivery device having a stop device (22) for releasing a particular length of thread in each case.
  8. A storage device according to Claim 1, characterised in that a plurality of fixed thread diverting elements (61 to 65) and a plurality of thread diverting elements (A to D) which may be adjusted in the same direction relative to the fixed thread diverting elements, or thread diverting elements (A, B; C, D) which may only be adjusted in pairs in opposite directions relative to one another, or thread diverting elements (A, B, C) which may only be adjusted in pairs in opposite directions relative to one another and have in each case a third fixed thread diverting element (63) between two adjustable thread diverting elements are provided.
  9. A storage device according to Claim 1, characterised in that stationary thread holders (13), which may be detached in controlled manner and cooperate with at least one adjustable thread diverting element (B) as a thread feeder, are provided for the storage position (I).
  10. A storage device according to at least one of Claims 1 to 9, characterised in that the thread tension damper (Z) has the first thread diverting elements (A, B), as seen in the thread picking direction, which may be adjusted as a pair, and three stationary thread diverting elements (61 to 63).
  11. A storage device according to at least one of the preceding claims, characterised in that the adjustable thread diverting element (A to D) is a pivot lever (9, 9') coupled to a rotary drive (G) such as a stepping motor, a rotary magnet or an actuator.
  12. A storage device according to Claim 11, characterised in that the pivot lever (9') is a multi-limb U-shaped element, whereof the limbs define the thread diverting elements (C, D).
  13. A storage device according to at least one of the preceding claims, characterised in that the adjustable thread diverting element (A to D) is a linearly movable rod (9") and is connected to a linear drive (H) such as a linear magnet, a linear motor, a linear actuator or a pneumatic cylinder piston unit.
  14. A storage device according to at least one of the preceding claims, characterised in that, in an electromotive or electromagnetic drive (G, H), the resilient damping force (R) may be generated by way of an associated control device (P) as a result of applying a brake current.
EP98966299A 1997-12-11 1998-12-11 Storage device Expired - Lifetime EP1038061B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19755160 1997-12-11
DE19755160A DE19755160A1 (en) 1997-12-11 1997-12-11 Storage device
PCT/EP1998/008093 WO1999029945A1 (en) 1997-12-11 1998-12-11 Storage device

Publications (2)

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EP1038061A1 EP1038061A1 (en) 2000-09-27
EP1038061B1 true EP1038061B1 (en) 2003-03-19

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DE (2) DE19755160A1 (en)
WO (1) WO1999029945A1 (en)

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CN103738792A (en) * 2014-01-21 2014-04-23 北京亨通斯博通讯科技有限公司 Small-sized cable coiling tension control device
CN103738793A (en) * 2014-01-21 2014-04-23 北京亨通斯博通讯科技有限公司 Small-sized cable coiling method

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SE516603C2 (en) * 2001-02-16 2002-02-05 Texo Ab Method and apparatus for length measuring and storing thread in weaving or textile machines
DE102005010534A1 (en) * 2005-03-04 2006-09-07 Ontec Elektro- Und Steuerungstechnik Gmbh Weft feeder for weaving machines, in particular rapier weaving machines
WO2017081711A1 (en) * 2015-11-11 2017-05-18 P.T.M.T. S.R.L Controlled system for supplying weft yarn in a loom
ITUB20155496A1 (en) * 2015-11-11 2017-05-11 Pezzoli Miria CONTROLLED PLOT WIRE FEED SYSTEM IN A FRAME
CN106087208B (en) * 2016-08-31 2018-02-06 江苏恒神股份有限公司 Carbon fiber weaving, which is used to have, opens up fine function circumferentially unwinding weft accumulator
CN107541830B (en) * 2017-08-15 2019-03-08 张家港思淇科技有限公司 A kind of yarn and yarn-forming mechanism and protective textiles and weaving method and equipment
CN109626118B (en) * 2019-03-03 2020-10-20 常山航翔纺织有限公司 Textile production winding machine convenient for tension adjustment and use method

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CH407904A (en) * 1964-01-23 1966-02-15 Sulzer Ag Rapier shuttle loom with weft thread storage device
AT264408B (en) * 1965-10-05 1968-08-26 Sulzer Ag Weft storage device
DE3202229A1 (en) * 1981-06-25 1983-01-13 Bernd Dipl.-Ing. 8000 München Scheffel Process and device for weft supply on looms
FR2681613A1 (en) * 1991-09-20 1993-03-26 Belmont Ateliers THREAD TENSIONER FOR TEXTILE MACHINES SUCH AS LOADERS.
DE4131652A1 (en) * 1991-09-23 1993-04-01 Iro Ab WEAVING MACHINE AND ENTRY BRAKE FOR WEAVING MACHINES

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103738792A (en) * 2014-01-21 2014-04-23 北京亨通斯博通讯科技有限公司 Small-sized cable coiling tension control device
CN103738793A (en) * 2014-01-21 2014-04-23 北京亨通斯博通讯科技有限公司 Small-sized cable coiling method
CN103738792B (en) * 2014-01-21 2016-04-13 北京亨通斯博通讯科技有限公司 Small dimension cable one-tenth dish tension control apparatus
CN103738793B (en) * 2014-01-21 2016-09-21 北京亨通斯博通讯科技有限公司 Small dimension cable becomes dish method

Also Published As

Publication number Publication date
DE59807587D1 (en) 2003-04-24
DE19755160A1 (en) 1999-06-17
EP1038061A1 (en) 2000-09-27
WO1999029945A1 (en) 1999-06-17

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