EP1143052B1 - Method and device for splitting the warp on a warping machine - Google Patents

Description

The invention relates to a method and a device for thread pitch on a warper according to the preamble of claim 1 and of claim 11. Such a method or apparatus is used to separate individual groups of warp threads during winding on the warping drum to a clean To achieve thread order. The method is suitable for the automatic insertion of crosshairs and sizing elements.

The original manual insertion of a partial cord has already been carried out automatically for some time. In this case, different methods and devices have become known.

The EP A 368 801 describes a method in which two parallel individual sections are introduced via a partial dressing in the tensioned thread bandage. Subsequently, the sections are connected to each other on both sides of the thread subassembly. The simultaneous introduction of the individual sections is effected by two spaced-apart rod-like holding elements. The finished separating element or the two individual sections are preferably formed by a plastic band, which is welded and does not have to be knotted. Such separators are not suitable for all applications.

The DE A 44 43 627 describes a method in which a sub-string is fed automatically using a Schnurzugstabs. To capture the sub-string this is sucked through a suction pipe. But with this device can not be in one single operation put a partial cord loop around a thread bandage.

The JP B 62-2055 describes a device consisting of two parallel thread tubes, which can be moved into an open compartment. In the fully retracted position, the two pipe ends are connected by a semicircular and open on the inside connecting bow. The sub-string is introduced by means of air flow in the one thread tube, deflected at the connecting bow and returned in the adjacent thread tube again. The connecting bow is fixed and because it is open on the inside, the sub-string can slide out when returning the two parallel thread tubes. A disadvantage, however, is that the open connection bow causes a large pressure drop in the pneumatic conveying of the sub-string. In addition, the two thread tubes and the connecting bow to each other must always be aligned exactly to ensure a smooth line deflection.

Due to the close spacing of the two thread tubes, the crosshairs must be divided at a very steep angle. As a result, a clear division of the upper and lower thread layer is not guaranteed safe.

When replacing the band loops inserted in the tree by two continuous strings is due to the close lying string loops, the clean thread pitch in certain materials (hairiness) hardly possible.

Another disadvantage is that the string loops are always the same length regardless of the bandwidth. As a result, the cord loop is designed for the maximum bandwidth. at In smaller bandwidths, the cord loop is much too long and will be overwrapped by the next band. This has the result that the string loops get stuck and thread breakages can occur when trees.

It is therefore an object of the invention to provide a method of the type mentioned in the introduction, with the help of a sub-string can be placed in the simplest way as a loop around a thread sub-group. The method should be largely automated with low susceptibility to failure. The device should be easy to use and it should possibly be suitable for retrofitting existing water treatment plants. In addition, sub-string loops with always the same excess length should be inserted or assembled at different bandwidths.

This object is achieved according to the invention by a method having the features of claim 1. In terms of the device, the object is achieved by a device having the features of claim 11.

The merging of the free ends of the two guide arms after the lateral insertion has the advantage that the sub-string can be passed without additional aids directly from one guide arm to the other guide arm. After insertion of the sub-string, the free ends are again opened so far that retraction of the insertion is possible. In this case, a string loop is placed around the thread sub-bandage with further subtraction of part string. The two guide arms are completely autonomous and precise alignment with other components is not required.

The guide arms are advantageously tubes which are connected when merging the free ends to a continuous flow channel, wherein the sub-string is withdrawn by means of an air flow in the flow channel. Since the free pipe ends are brought together directly, no pressure loss occurs at the point of inflection of the sub-string. The compressed air consumption can therefore be kept relatively low. The air flow can be generated for example by applying a negative pressure at, based on the flow direction, output of the second guide arm. In certain cases, the promotion of the sub-string could also be purely mechanical. With sufficient rigidity, it would be conceivable, for example, to advance the sub-string by means of clamping rollers.

Since in a sharpening usually numerous cord loops must be inserted, the process works particularly efficiently when an inserted cord loop of the insertion is separated from the still lying in the guide arms sections of the sub-string and if at the next insertion process, lying in the second guide arm part cord section together is discharged with the return of a new sub-string. Evidently, the sub-ropes do not have to be removed manually in this way. That part of the string section which remains in the first guide arm is already the beginning of the following part of the string which is pneumatically transported into the second guide arm in the next following operation. The insertion element is advantageously moved on a linear feed path. Thus, you can always dive to the appropriate bandwidth without making an adjustment of the pipe lengths.

After retraction of the insertion element a Knotgerät is pushed for knotting the cord loop in the region of the feed path, which is withdrawn after knotting and severing the cord loop again. In this way, the knotting does not have to be done manually and the Knotgerät can be placed exactly in the right area, without obstructing the insertion. For this purpose, it is particularly advantageous if the Knotgerät is moved to a flexible thrust element from a rest position on a curved path in a Knotlage. As a result, the Knotgerät can be arranged to save space under the feed level of the insertion.

Further advantages can be achieved if the knotted cord loop is aligned by means of a positioning and tensioning device such that the cord loop rests on at least one side of the thread partial bandage or on the warp band. This prevents a laterally protruding cord loop from being overwrapped by the next warp band. Thus, it is prevented when trees that the cord loops get stuck and thread breaks occur. The alignment of the cord loop is advantageously carried out without contact by means of a suction device or by means of a blowing device. However, such a positioning and clamping process could also be used advantageously in manual warping machines for positioning and tensioning the cord loop.

It is also advantageous if the cord loop is applied to the thread subassembly such that in the subsequent Bäumprozess the cord loop is on the outside, i. above, which greatly facilitates accessibility.

In the device according to the invention, the two guide arms are movably mounted such that their free ends can be brought together in a preferably pincer-like movement. It is advantageous if at least one of the two guide arms is pivotally mounted and when it is movable away with a pressure medium cylinder on the adjacent guide arm to or from this. For this purpose, a simple hinge, with only a relatively small swing angle must be covered to merge the free ends. Alternatively, however, the guide arms could also be brought together or opened in parallel.

The two guide arms are preferably formed as tubes whose free ends form a closed pipe bend after merging. This creates a U-shaped flow channel, in which unhindered a sub-string can be advanced. The feed takes place with an air conveyor (Air Mover) which is in operative connection with the pipes for generating an air flow. The first guide arm can be connected at the entrance with a Schurvorratsbehälter and at the output of the second guide arm may be arranged an air conveyor for generating a negative pressure in the tubes. Since the tubes together with the string storage container form a closed channel system, the sub-string can be removed in a simple manner and with low energy consumption.

The insertion element is advantageously mounted on a carriage and inserted along a linear feed path in the thread assembly. In the region of the feed path, a knotter is preferably displaceable by means of a flexible push element and along a curved path between a rest position and a knot position.

Figur 1

eine Schäranlage in Seitenansicht schematisch stark vereinfacht,

Figur 2

ein geteiltes Fadenfeld in Seitenansicht,

Figur 3

eine Teilvorrichtung mit Einführelement und Knotvorrichtung in perspektivischer Darstellung,

Figur 4

das Einführelement gemäss Figur 3 nach dem Einfahren in den Fadenverband mit geöffneten Führungsarmen,

Figur 5

das Einführelement nach dem Schliessen der Führungsarme zum Einziehen der Teilschnur,

Figur 6

das Einführelement nach dem Wiederöffnen der Führungsarme mit eingezogener Teilschnur,

Figur 7

das Einführelement nach dem Zurückziehen aus dem Fadenverband mit Schnurschlaufe,

Figur 8

das Einführelement mit Knotvorrichtung in der Knotstellung zum Verknoten der Schnurschlaufe,

Figur 9

eine Ansicht in Fadenlaufrichtung auf die Schärtrommel mit geknoteter und danach durch Saugen ausgerichteter Schnurschlaufe,

Figur 10

eine Seitenansicht der Figur 9, und

Figur 11

Eine Ansicht in Fadenlaufrichtung auf die Schärtrommel mit geknoteter und danach durch Ansaugen ausgerichteter Schnurschlaufe.

Further individual features and advantages of the invention will become apparent from the embodiments described below and from the drawings. Show it:

FIG. 1

a sewage treatment plant in side view schematically simplified,

FIG. 2

a split thread field in side view,

FIG. 3

a sub-device with insertion and knotting device in perspective view,

FIG. 4

the insertion according to FIG. 3 after entering the thread assembly with open guide arms,

FIG. 5

the insertion element after closing the guide arms for retraction of the sub-string,

FIG. 6

the insertion element after reopening the guide arms with retracted part cord,

FIG. 7

the insertion element after retraction from the thread bandage with cord loop,

FIG. 8

the insertion element with Knotvorrichtung in Knotstellung for knotting the cord loop,

FIG. 9

a view in the direction of yarn travel on the warping drum with knotted and then aligned by suction cord loop,

FIG. 10

a side view of FIG. 9 , and

FIG. 11

A view in the thread running direction on the warping drum with knotted and then aligned by suction line loop.

As in FIG. 1 shown, there is a wastewater treatment plant 1 essentially from the warper and from the creel 3. On the creel a plurality of coils 4 are plugged, the threads 5 each pass a thread tensioner 6, which generates the desired yarn tension. Subsequently, each thread 5 passes a thread monitor 7, on which the existence control of the thread is made.

From the creel 3, the threads are freely stretched to a gap 8 with the two leaves 8a, in which the threads 5 a certain thread order, i. Location and order received. Subsequently, the threads are passed through the warper sheet 9, in which the threads are brought together to the desired Schärbandbreite to be wound up as a thread assembly 10 via a guide roller 11 in a known manner to a winding 56 on the warping drum 12.

For shedding the thread assembly by means of the horizontal rods 18 is moved together, as based on FIG. 2 will be explained. Both the warper blade 9, as well as the actual sub-device 20 are arranged on a shear table 19.

The warping drum rotates in the direction of arrow a, so that the warp strip is wound around the guide roller down. Below the guide roller a pressure roller 17 is arranged, which presses the warp strip with the required pressing force against the winding.

FIG. 1 also shows the warp beam 16, on which after the archipelago, the entirety of all Schärbänder is wound up. The warping drum moves to the trees in the direction of arrow b, the chain is possibly still guided over one or more guide rollers 49.

To the Fachbildung become according to FIG. 2 First all coming from the creel 3 threads 5 merged by moving the two rods 18 on a horizontal plane. Subsequently, the two read sheets 8a are moved in the direction of arrow c and c '. The one leaflet is moved down in the direction of arrow c and the other in the direction of arrow c 'up. The appropriate arrangement of the solder joints 50 creates a clean symmetrical compartment with an upper thread subassembly 25a and a lower thread subassembly 25b.

In this way, a compartment 51 is opened, in which a sub-string can be fed.

Since the retracted part cord can not pass the warper blade 9, the sub-string retraction must be done in the direction of thread travel after the warp sheet. For this purpose, the blade is moved from its normal operating position in the direction of care d against the flush leaves 8a. Now, the symbolically illustrated sub-device 20 can be activated to introduce the sub-string in the open tray or to delimit the lower thread subassembly 25b with a cord loop.

FIG. 3 shows the entirety designated 20 sub-device whose essential working element consists of the insertion element 28 and the knotting device 43. The insertion element is arranged on a carriage 40 which is linearly displaceable in the direction of arrow e on a rail 42. The drive is made by a positionable drive system 41, so that always submerged by the appropriate bandwidth and the sub-string can be tailored to the exact bandwidth. Preferably, the drive system consists of a linear unit with drive motor can but also be done by a pneumatic linear unit or by other drive systems.

The insertion element has a first upper guide arm 26 and a second lower guide arm 27 in the form of tubes, the free ends 29 and 31 are bent in a circular arc by 90 °.

Further details of the insertion are from FIG. 4 seen. The first upper guide arm 26 is mounted on a hinge 33, so that it can be pivoted from an opening position parallel to the second lower guide arm 27 into an open position. The opening movement is carried out by means of a pneumatic cylinder 34. Preferably, the first upper guide arm 26 is biased by a spring in the closed position, so that you can work with a pressure medium cylinder can be acted upon on one side.

At the inlet 30 of the first upper guide arm 26, a flexible connecting hose 52 is connected, which leads to a coil chamber 38. In the coil chamber, a part cord coil 21 is held on a coil holder 36, from which a partial cord 22 (FIG. FIG. 5 ) can be deducted. In the area of the coil holder 36, a photosensor 37 is arranged, which monitors the sub-string stock. Separately separated, a chamber 39 is arranged under the coil chamber 38, which chamber receives the partial cord rests from the second lower guide arm 27.

For the promotion of the sub-string, an air conveyor 35 is arranged at the outlet 32 of the second lower guide arm 27, which generates a negative pressure in the pipeline, which is sufficient to promote the sub-string.

Out FIG. 3 It can also be seen that under the rail 42, a curved guide channel 47 is arranged, which extends approximately at right angles to the level of the rail. In this guide channel, a flexible thrust element 45 can be moved by means of a drive 46, for example in the form of a pressure medium cylinder. On the flexible thrust element a knot device 43 known per se is fastened with a cutting device 44. The Knotgerät can in this way from a rest position R below the plane of movement of the insertion element 28 (FIG. FIG. 5 ) in a Knotstellung K on the feed level of the insertion ( FIG. 3 ) are moved.

To insert a partial cord loop plays out from the open compartment according FIG. 2 the following procedure:

First, the partial device moves in the direction of the reading leaves 8a and then introduces a partial bar (not shown here) into the compartment 51 in the area of the largest possible compartment opening. To ensure that the thread subassemblies 25a and 25b are cleanly separated from each other, the sub-device then moves towards the warping drum in the actual working position. There, the insertion element 28 according to FIG. 4 introduced into the thread assembly, so that the first upper guide arm 26 is located in the open compartment between the thread subassemblies 25a and 25b. In the case of easily dividing materials, it would be possible to dispense with the additional parting process by means of a partial rod after the shed formation.

After reaching this position, the first upper guide arm 26 is pressed against the free end 31 of the second lower guide arm 27. How out FIG. 5 it can be seen, the two guide arms are parallel to each other. In this position, the air conveyor 35 is actuated, wherein the Part cord 22 withdrawn and passed through the first upper and second lower guide arm. Shortly after the actuation of the air conveyor 35, the first upper guide arm 26 must be opened so that the Schnurfang and the whisker can be sucked into the second lower guide arm 27. A previously left in the second lower guide arm 27 Schnurrest is simultaneously transported into the chamber 39.

After opening the first upper guide arm 26, the sub-string 22 is stretched between the two free ends 29 and 31. This situation is in FIG. 6 shown. In order to place a partial cord loop 23 around the lower partial thread bandage 25b, the insertion element 28 must now move according to FIG FIG. 7 be withdrawn in the direction of arrow f. In this retraction movement again some sub-string is unwound from the spool. Subsequently, the sub-string loop 23 can be knotted. For this purpose, according to FIG. 8 pushed the Knotgerät 43 in the Knotstellung K. The knotted loop loop is thereby separated simultaneously with the cutting device, so that in each case a part cord section 24a and 24b remains in the two guide arms. The section 24a forms the beginning of the next sub-string insert, while the section 24b is removed together with the next line retraction.

Of course, can be placed in the same exact way around the upper thread part 25a a cord loop. The two guide arms 26, 27 need not necessarily be arranged on a vertical plane. In certain cases, it would even be conceivable to simultaneously draw a cord on both sides of a crosshair point, with the two guide arms having to lie on a horizontal plane. Preferably, however, the cord loop is applied to that partial thread assembly which, when being wound up, faces away from the drum Side is. As a result, the loop is more accessible when trees and thread breakage during mining can be avoided. In the exemplary embodiment, this is the lower thread subassembly 25b. The device according to the invention can be used both on fully automatic warping machines and on manual machines.

FIGS. 9 and 10 still show an auxiliary device that can also be used in the processing of conventional cord loops. The warping drum 12 has a cylindrical part 13 and a conical part 14. The warp strip 15 is wound up along the cone slope in order to achieve optimal winding stability. Immediately after the formation of the part cord loop, this encloses the warp band as a loose part cord loop 231 such that the loop projects beyond the warp band on both sides. This would mean that the projecting loop section would be overwrapped by the next following warp strip and could lead to thread breaks during the removal. The sub-string loop must therefore be arranged as a positioned and tensioned sub-string loop 23g, that the loose loop end is located entirely within the width of the warp strip.

For this purpose, a suction device (ejector) 48 is arranged on a boom 53, which serves as a positioning and tensioning device. The boom is located as close as possible to the warping drum before the take-up point. The initially loose part cord loop 231 is sucked by the Ejector with a suction nozzle 54, just before the overwinding by the warp band, wherein the loose loop portion is positioned by the edge zones in the middle of the warp strip. With the position 55, a pressure medium cylinder is shown, with which the pressure roller 17 can be pressed against the winding 56. The suction nozzle 54 is relative to their relative angular position, immersion depth in the gusset between the winding and warp strip, and adjustable distance to the guide roller. The entire arm 53 is preferably swingable approximately 90 ° ( Fig. 9 ) to facilitate access to the warp band. The ejector is supplied via a line, not shown here with compressed air (to generate a suction effect). The determination on the boom 53 can be made via a locking screw 57.

An alternative embodiment of a positioning and tensioning device is in FIG. 11 shown. An influence on the loose cord loop 231 is obviously not only possible by suction, but also by blowing. For this purpose, the cord loop is blown by an adjustable tuyere 58 from the side on which the subsequent warp strip is to be wound. The cord loop 23g stretches in the direction of the cone part 14, whereby it rests in the figure at least on the right side of the warp strip 15.

The tuyere 58 is also mounted on a boom 59 and is supplied via a suitable supply of compressed air.

Claims (20)

1. Method for splitting the warp threads on a warping machine (2), in which between the threads (5), which are opened for shed formation, of a warp bundle (10) a lease cord (22) is inserted for delimiting a split warp bundle (25a, 25b), an introduction element (28) consisting of a first and a second guide arm (26, 27) first being introduced laterally into the warp bundle, a lease cord subsequently being drawn off from a lease cord supply and inserted by way of the introduction element as a cord loop (23) looped around the split warp bundle in such a way that the lease cord is introduced along the first guide arm (26), turned and led back along the second guide arm (27), and lastly the introduction element being retracted from the warp bundle and the cord loop knotted, characterised in that after being introduced laterally the free ends (29, 31) of the two guide arms (26, 27) are brought together in a preferably pincer-like movement, the lease cord being directly transferred at the ends from the first guide arm to the second guide arm, and in that the free ends for retracting the introduction element (28) are again opened.
2. Method according to claim 1, characterised in that the guide arms (26, 27) are tubes which, when they bring together the free ends, are connected to form a continuous flow channel, and in that the lease cord (22) is drawn off by way of an airflow in the flow channel.
3. Method according to claim 2, characterised in that the airflow is produced by applying a vacuum at the second guide arm (27).
4. Method according to either claim 2 or claim 3, characterised in that once the introduction element (28) has been retracted the inserted cord loop (23) is separated from the portions (24a, 24b) of the lease cord still arranged in the guide arms, and in that when the next subsequent insertion procedure takes place the lease cord portion (24b) arranged in the second guide arm (27) is led away together with a new lease cord being led back.
5. Method according to any one of claims 1 to 4, characterised in that the introduction element (28) is moved on a preferably linear feed path, and in that once the introduction element has been retracted a knotting device (43) for knotting the cord loop (23) is pushed into the region of the feed path and, after knotting and separating off the cord loop, is again retracted.
6. Method according to claim 5, characterised in that the knotting device (43) is displaced on a flexible push element (45) from a rest position on a curved path into a knotting position.
7. Method according to any one of claims 1 to 6, characterised in that the knotted cord loop (23) is positioned and tensioned by way of a positioning and tensioning device (48) in such a way that the cord loop, at least on one side, abuts the split warp bundle which has been looped around or the band of warp threads (15).
8. Method according to claim 7, characterised in that the cord loop (23) is suctioned with a suction device and is positioned and tensioned in this manner.
9. Method according to claim 7, characterised in that the cord loop (23) is blown with a blowing device (58) and is positioned and tensioned in this manner.
10. Method according to any one of claims 1 to 9, characterised in that the cord loop (23) is applied to the split warp bundle (25b) in such a way that during the subsequent beaming process the cord loop lies on the outer side.
11. Device for splitting the warp threads on a warping machine (2), in particular for carrying out the method according to claim 1, comprising an introduction element (28) consisting of a first and a second guide arm (26, 27), which element can be introduced laterally into the threads (5), which are opened for shed formation, of a warp bundle (10), it being possible by way of a feed device (35) to introduce along the first guide arm (26), turn and lead back along the second guide arm (27) a lease cord (22) in such a way that a cord loop (23) looped around a split warp bundle (25b) is formed, characterised in that the two guide arms (26, 27) are movably mounted in such a way that their free ends (29, 31) may be brought together in a preferably pincer-like movement.
12. Device according to claim 11, characterised in that at least one of the two guide arms (26) is pivotably mounted, and in that it is movable with a pressure means cylinder (34) both onto the neighbouring guide arm (27) and away therefrom.
13. Device according to either claim 11 or claim 12, characterised in that the two guide arms (26, 27) are configured as tubes, of which the free ends (29, 31) form a closed tube bend when brought together.
14. Device according to any one of claims 11 to 13, characterised in that the feed device is an air conveying device (35) which is actively connected to the tubes so as to provide an airflow.
15. Device according to claim 14, characterised in that the first guide arm (26) is connected at the entrance (30) to a cord supply container (38), and in that an air conveying device (35) for producing a vacuum in the tubes is arranged on the second guide arm (27).
16. Device according to any one of claims 11 to 15, characterised in that the introduction element (28) is mounted on a carriage (40) and can be introduced along a preferably linear feed path (42) into the warp bundle, and in that in the region of the feed path a knotting device (43) is displaceably mounted in such a way that it is movable from a rest position, in which the introduction element has been introduced, into a knotting position in which the introduction element has been retracted.
17. Device according to claim 16, characterised in that the knotting device (43) is fastened on a flexible push element (45) and is movable along a curved path (47) between the rest position and the knotting position.
18. Device according to any one of claims 11 to 17, characterised in that the lease cord may be drawn-off from a cord bobbin holder (36) which is arranged in the active region of a photo-sensor (37) for monitoring the cord supply.
19. Device according to any one of claims 11 to 18, characterised in that in the region where the warp bundle is wound onto the warping drum, a positioning and tensioning device (48) is arranged, with which a knotted cord loop (23) can be positioned and tensioned.
20. Device according to claim 19, characterised in that the positioning and tensioning device (48) comprises a suction device or a blowing device.

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