EP0403430B1 - Warping machine with lease formation, vertically adjustable comb, procedure and function - Google Patents

Description

The invention relates to a warping machine with a cross reed which is adjustable in height for the formation of cross hairs according to the preamble of claim 1. The invention further relates to a method for operating such a machine.

For the formation of crosshairs, it has long been known to hold the coulter essentially in a common plane with the aid of the guide rods in the area of the cross reed. By moving the cross reed upwards or downwards, individual threads can be deflected from this plane, forming a compartment for inserting a dividing element. Such a device is described for example in DE-C-25 44 445 and DE-A-3 205 218. Even in the event of a thread break, it is expedient if the thread coulter is brought together on a common level, because the break point is not only more quickly recognizable, but is also more accessible for the necessary repair work. This position for the new drawing of broken threads is shown for example in CH-A-370 363.

In the known devices, the creation of a crosshair was carried out manually in individual steps by the operator. Not only is this very time-consuming, but it also requires a high degree of concentration, since the same device can be used to form a wide variety of crosshairs in different orders. Incorrect manipulations can therefore easily occur, which can cause considerable problems later when creating the warp. Recently, the insertion of a dividing element for cross hair formation is automated, which the The risk of incorrect manipulation is increased if the operator has to manually operate the cross reed and / or the guide rods.

It is therefore an object of the invention to provide a warping machine of the type mentioned at the outset which enables a high degree of automation and in which a plurality of work positions which are necessary in the course of a work process can be approached automatically. The operator should be relieved in that a certain sequence of movements is motor-controlled without manual intervention, so that incorrect manipulations are largely avoided.

This object is achieved according to the invention with a warping machine which has the features in claim 1. The independent motorization of the machine elements to be moved enables programmed control for each required work step, whereby the operator can limit himself to monitoring functions and to triggering individual, automated work steps.

The two guide rods can preferably be moved synchronously with respect to one another or away from one another via a gear mechanism. This ensures that the thread field is constricted evenly from both sides.

The cross reed can be displaced via a gear from a central position relative to the guide rods at least into a lower and an upper crosshair position. Of course, intermediate positions are also conceivable if these are required in individual cases. The motor control takes place in a particularly simple manner if limit switches are arranged on the transmission, by means of which the drive motor can be controlled for moving to the three working positions.

Further advantages can be achieved if in the direction of flow the threads in front of the guide rods, a sub-device for dividing the thread sheet into individual groups is arranged, which can be moved against the cross reed or away from the cross reed by an independent and separately controllable drive motor. The part device known per se normally has the task of grouping the family of threads according to the number of floors on the creel. The sub-device can consist, for example, of horizontal sub-bars which are attached to a sub-bar holder. Instead of the partial rods, an eyelet board, in which each individual thread is guided, would also be conceivable. Particularly in the event of a thread break, it is important for free access that the part device is moved away from the cross reed. But it can also be useful to pull the threads away. The separate drive of the sub-device in turn enables it to be moved in different ways depending on other work steps.

The dividing device can e.g. be displaceable via a gearbox which has a stationary, rotatable threaded spindle which engages in a threaded bushing to which the dividing device is attached. But also other types of gear such as Racks, cables, etc. would be conceivable.

Damage to the threads in the cross reed can be avoided by arranging the cross reed and the drive motor assigned to it on a frame which can be set into an oscillating movement independently of the working position of the cross reed by an independent and separately controllable drive motor. The cross reed can thus be moved into a cross hair position during the back and forth movement. On the other hand, the oscillating movement can only be triggered when the cross reed is in the normal running position and when the warping drum is running at normal speed. The back and forth movement can, for example, with a rotary drive via an eccentric gear respectively. However, gearless, electromagnetic vibration generation would also be conceivable.

To reduce the risk of accidents, all drive motors can be provided with load-dependent slip clutches or with other securing elements which stop the drive motors or which limit the transmissible forces.

A variety of operating options result if at least the drive motors for the cross reed and for the guide rods can be controlled via a common, programmable control device. However, all of the drive motors mentioned above can preferably be controlled via the common control device, which enables an optimum of programming options and various switching functions. Said control device is preferably also operatively connected to a main control device for controlling the warping machine. The important functions of the warping machine such as Winding speed, tension, side feed, etc. are already controlled by a central computer today. Linking the control functions for cross reeds and guide rods with those of the central computer therefore represents a further step in the fully automatic warping process. Depending on the type of machine, the control device for the various drive motors is expediently integrated directly into the main control device.

The invention also relates to a method for operating the warping machine mentioned at the beginning. This is characterized in that when the cross reed is returned from a crosshair position to a neutral running position, the warping drum is rotated in such a way that the threads remain tensioned. On the other hand, the return speed of the cross reed can also be selected such that the threads remain tensioned during the entire return movement when the warping drum has a predetermined creep speed.

When the cross reed is extended into a crosshair position, the thread path of individual threads between the thread spool on the creel and the warping drum is obviously enlarged. This additional thread length is unwound on the creel. When the cross reed moves back into the neutral running position, there is thus an excess length which would lead to a sag of the threads. The sag according to the invention between the winding speed of the warping drum and the return movement of the cross reed can be avoided.

Figur 1

eine Schäranlage in Seitenansicht in stark vereinfachter Darstellungsweise,

Figur 2

die Fadenkreuzvorrichtung mit ihren Antriebselementen in Seitenansicht,

Figur 3a

die Fadenkreuzvorrichtung gemäss Figur 2 in Laufstellung,

Figur 3b

die Fadenkreuzvorrichtung gemäss Figur 2 in Reparaturstellung beim Beheben eines Fadenbruches,

Figur 4a

die Fadenkreuzvorrichtung gemäss Figur 2 in einer unteren Fadenkreuzstellung,

Figur 4b

die Fadenkreuzvorrichtung gemäss Figur 2 in einer oberen Fadenkreuzstellung,

Figur 5

den Aufbau eines Fadenkreuzes,

Figur 6a

eine Webkette mit einem Anfangs- und mit einem Endkreuz,

Figur 6b

eine Webkette mit zwei zusätzlichen Mittelkreuzen,

Figur 6c

eine Webkette mit einem zusätzlichen Dreifachmittelkreuz, und

Figur 7

das Bedienungsfeld für eine Steuereinrichtung.

Further advantages and individual features of the invention result from the following description of an exemplary embodiment and from the associated drawings. Show it:

Figure 1

a warping plant in side view in a greatly simplified representation,

Figure 2

the crosshair device with its drive elements in side view,

Figure 3a

the crosshair device according to Figure 2 in the running position,

Figure 3b

2 the crosshair device according to FIG. 2 in the repair position when removing a thread break,

Figure 4a

the crosshair device according to Figure 2 in a lower crosshair position,

Figure 4b

the crosshair device according to Figure 2 in an upper crosshair position,

Figure 5

building a crosshair,

Figure 6a

a warp with a beginning and an end cross,

Figure 6b

a warp with two additional center crosses,

Figure 6c

a warp with an additional triple center cross, and

Figure 7

the control panel for a control device.

Figure 1 shows a warping system 1 in side view, consisting of the creel 2 and the warping machine 3. In a known manner, the threads 5 are drawn off the attached spools 4 and fed to the warping machine 3 via thread tensioner 6 and thread monitor 7. The threads first pass through the crosshair device 8 before they receive the required bandwidth of the thread to be wound up through the warping device 9 and are thus wound as a thread assembly 11 via the deflecting roller 12 onto the warping drum 13.

In a likewise known manner, a plurality of ribbons 10 result in the weaving chain 14, with all ribbons 10 then being rolled up or tied together onto the warp beam 15. The warp beam is presented to the weaving machine for the manufacture of the fabric.

In order for the specified thread sequence of a repeat in the weaving chain to be maintained until it is used on the weaving machine, it is known that it is necessary to create the so-called crosshairs specifically at the beginning and at the end of each band 10. Crosshairs are also required in connection with size treatment, which is then referred to as the size division. These crosshairs are created in the crosshair device 8, the essential components of which are shown in more detail in FIG.

As is known per se, the cross-hair device essentially consists of the height-adjustable cross reed 16 and the guide rods 28 and 29 arranged in front of it. In front of the guide rods, which can be moved against one another, a plurality of parallel partial rods 35 are arranged one above the other, which are held laterally by a pair of partial rod holders 34 will.

The cross reed 16 is connected to a rack 24, which meshes with the gear 23 of a lifting motor 22. The lifting motor is fastened to a frame 19 and, depending on the driving direction of the lifting motor, the cross reed can be moved up or down in the direction of arrow 20. The lifting motor 22 receives switching impulses through limit switches 26 which are arranged in the transmission area. To actuate the limit switch 26, a cam 27 is arranged on the rack 24. The limit switches 26o and 26u each define an upper and a lower crosshair position of the cross reed, while the limit switch 26m defines a middle position.

The frame 19 is displaceably mounted in the plane of the cross reed 16 and can be continuously set in an oscillating motion in the direction of the arrow 20 by means of a traversing motor via an eccentric 18. In this way it is avoided that the teeth 21 of the cross reed 16 cut into the threads 5. Obviously, the frame 25 of the cross reed can be moved independently of the actuation of the traversing motor 17.

A lower and an upper guide rod 28 and 29 are arranged in front of the cross reed 16, each being connected to a rack 30 and 31, respectively. The teeth of these racks are directed towards each other and are slidable in parallel. Both racks mesh with the toothed wheel 32 of a thread field motor 33, so that the guide rods 28 and 29 can be moved in a synchronous movement with respect to one another or away from one another are. To define the two end positions for the guide rods 28, 29, limit switches could also be arranged on the racks.

The partial rod holder 34 with the horizontal partial rods 35 is arranged in front of the guide rods 28 and 29. These usually divide the thread field coming from the creel according to the number of floors before it is fed to the cross reed 16. The partial rod holder is fastened to a threaded bushing 36 which is seated on a stationary threaded spindle. The threaded spindle 37 is driven by a partial rod motor 38, so that the threaded bushing 36 and thus the partial rod holder 34 can be moved against the cross reed or away from it.

All drive motors 17, 22, 33 and 38 and their gear elements are elegantly covered by a housing 39, dust-proof and accident-proof and arranged below the crosshair device 8. This motor separation of the individual elements shown in FIG. 2 now allows a multitude of control options, which are explained in more detail below. The individual drive motors can be controlled via a common control device 56, not shown in detail.

FIG. 3a shows the relative position of the individual machine elements of the crosshair device 8 in the normal running position, in which the warping drum 13 winds up the belt 10 already mentioned via the deflection roller 12. The cross reed 16 is located in a central position relative to the guide rods 28, 29 and is continuously moved up and down by the traversing motor 17, without however affecting the thread field 5 in any way. The two guide rods 28 and 29 are fully open and do not touch the thread field 5 either.

The partial rod holder 34 with the partial rods 35 has moved close to the cross reed or to the guide rods and divides the thread field in the manner already described.

If, for example, one of the thread monitors 7 detects a thread break on any level, the warping machine 3 stops in a known manner, but at the same time the elements of the cross hair device automatically assume the position shown in FIG. 3b. The partial rod holder 34 is moved away from the cross reed 16 by actuating the partial rod motor 38 in the direction of arrow 40. At the same time, the thread field motor 33 is activated so that the guide rods 28 and 29 are moved against each other until they are approximately on the same level. Obviously, this leads to a flat thread assembly 41 being formed between the guide rods 28/29 and the deflection roller 12. This flat thread assembly 41 now allows the operator to immediately identify the position of a thread break and to correct it correctly in terms of position. The cross reed 16 remains in the neutral central position, although the traversing motor 17 can also be shut down during the machine stop.

The crosshair formation is explained below with reference to Figures 4a and 4b. For the formation of the first crosshairs, the guide rods 28 and 29 are again moved together in a manner similar to that in the repair position according to FIG. 3b. However, the partial rod holder 34 remains in the approached position, which it also assumes in the running position according to FIG. 3a. The cross reed 16 is then lowered into the lower crosshair position by the lifting motor 22. For example, each odd thread is deflected out of the horizontal thread assembly 41 by the soldered connection 42, while the even threads remain unaffected. The lowering of the cross reed obviously opens a compartment 43 into which a first cross cord 44 can be drawn. In order to be able to make full use of the compartment height, preference is given to this the Schärriet 9 automatically moved against the Kreuzriet before retracting the cross cord and then reset again, as indicated by the horizontal arrow 71. The insertion of the cross cord or other dividing means can also be done by a machine, not shown here, which engages in the compartment 43 from the side.

In order to insert the second cross cord 47, the warping machine 3 or the warping drum 13 is first moved a certain distance. The cross reed 16 is then brought into the upper crosshair position according to FIG. 4b, while the guide rods 28 and 29 maintain their retracted position. In this position, the odd threads are deflected upwards by the lower soldered connections 45 on the cross reed, while the straight threads in turn remain unaffected in the horizontal position. In the same way, the second cross cord 47 can now be inserted into the compartment 46 thus formed.

Obviously, depending on the machine operation, different combinations of crosshairs can be generated, as can be seen from FIGS. 5 and 6a to 6c. The process explained with reference to FIGS. 4a and 4b leads to a simple crosshair, as shown in FIG. 5. FIG. 6a shows a warp chain 14 which has an initial cross hair 50 consisting of two cross cords 44 and 47 and an end cross hair 51, also consisting of two cross cords 44 and 47. If necessary, additional crosshairs 52 and 53 can also be placed within the warp chain 14, as can be seen in FIG. 6b. The initial crosses 50 and the end crosses 51 generally always remain the same, while different variants are conceivable in between. For example, FIG. 6c shows a triple cross 54 consisting of three cross strings 55 instead of normal intermediate crosses. The deflected threads according to the FIGS. 4a and 4b obviously cover a greater distance than those threads which remain in the horizontal thread structure 41. When the cross reed 16 moves back into the middle position or when changing from one crosshair position to the other, the warping drum 13 is tensioned so that no sagging of the threads can occur. Since the insertion of the crosshairs is also possible in the creeper of the warping machine 3, the displacement speed of the warping 16 is preferably adapted to the creeper speed so that sagging of individual threads is not possible at any time.

The control device 56 shown in FIG. 1 for the various drive motors is preferably operatively connected to a computer 72 which serves as the main control device for the entire system. The warping data can be entered into this computer via an input station 73, and the necessary crosshairs can also be preprogrammed at the same time. A screen 74 facilitates communication between man and machine and is also used for operator guidance in that the operator 70 receives instructions via the screen 74. The computer 72 is also in operative connection with the thread monitors 7 on the creel 2 and with a machine 76, not shown, for the automatic insertion of the cross cords through the connecting line 75.

The control device 56 can have a control panel, which is shown for example in FIG. 7. Various switching devices are arranged on the control panel with which control processes can be triggered. A key switch 57 secures the control device and enables the preselection of different operating modes. The programming switches 58 to 61 and possibly other programming switches also allow various functions to be triggered. For example, the button 58 can be used to press the upper button and 59 the button lower crosshair position of the cross reed. The cross lay can thus be started either with a deflection downwards or upwards, as shown in FIGS. 4a and 4b. By pressing the button 60, a program runs for inserting two cross cords and by pressing the key 61, one for inserting three cross cords.

The programming switches 58 to 61 are formed as illuminated buttons and the selected functions flash during the course of the entered program. The lamp 62 signals the beginning and the duration of the cross lay sequence. The illuminated key 63 signals the automatic cross lay sequence. With the stop button 64, the automatic cross lay sequence can be interrupted at any time. By pressing the illuminated button 65, the system leaves an automatic control sequence and it is in turn possible to operate the partial rod holder, the cross reed and the guide rods individually using the keys 66, 67, 68 and 69, in any order.

The separately controllable motors of the crosshair device result in many different possible combinations in free manual operation with any sequence of movements or in automatic mode with a dependent sequence of movements. A sensible dependency would be, for example, that the cross-reed functions are blocked at normal production speeds.

The various programming options for the dividing device, the guide rods and the cross reed are shown in the table below. The traversing motor 17, which is expediently only activated in the running position according to FIG. 3a, could also easily be included. The displacement of the Schärriets 9 in the direction of arrow 71 with its own drive motor, not shown here, could also be integrated into the automatic movement sequence.

Claims (14)

1. Sectional warping machine (3) with a height adjustable cross reed (16) for the formation of yarn crossings, and with two guide rods (28, 29) arranged, with reference to the direction of the yarns (5) running through, in front of the cross reed, which are arranged on each side of the yarn warp and which are able to be moved towards one another in one plane for bringing together the yarn warp, characterized in that drive motors (22, 23), which are independent from one another, are allocated to the cross reed (16) on the one hand and both the guide rods (28, 29) on the other hand, said drive motors being able to be separately controlled, both the guide rods (28, 29) being able to be moved synchronously towards one another respectively away from one another by means of a transmission (30, 31, 32), and the cross reed (16) being able to be displaced by means of a transmission (23, 24) from a middle position at least into an upper and into a lower yarn crossing position in relation to the guide rods (28, 29).
2. Sectional warping machine according to claim 1, characterized in that limit switches (26, 27) are arranged on the transmission (23, 24) for the cross reed, by means of which the drive motor (22) is able to be controlled for travel to the three working positions.
3. Sectional warping machine according to one of the claims 1 or 2, characterized in that a leasing device (34, 35) for division of the yarn warp into individual groups is arranged, with reference to the direction of the yarns running through, in front of the guide rods (28, 29), said leasing device being able to be displaced by means of an independent and separately controllable drive motor (38) towards the cross reed (16) respectively away from the cross reed.
4. Sectional warping machine according to claim 3, characterized in that the leasing device (34, 35) is able to be displaced by means of a transmission which possesses a rotatable threaded spindle which is mounted on a fixed position bearing and which engages in a threaded sleeve (36) on which the leasing device is mounted.
5. Sectional warping machine according to one of the claims 1 to 4, characterized in that the cross reed (16), and the drive motor (22) allocated to it, are arranged on a frame (19) which, independent from the working position of the cross reed, is able to be set into an oscillating motion by means of an independent and separately controllable drive motor (17).
6. Sectional warping machine according to claim 5, characterized in that the frame (19) is mounted on a bearing to be able to be displaced in the plane of the cross reed (16), and that it is connected via an eccentric transmission (18) with the drive motor (17).
7. Sectional warping machine according to one of the claims 1 to 6, characterized in that all drive motors (17, 22, 33, 38) are provided with load controlled friction clutches.
8. Sectional warping machine according to one of the claims 1 to 7, characterized in that at least the drive motors (22, 33) for the cross reed (16) and for the guide rods (28, 29) are able to be controlled by means of a common, programmable control device (56).
9. Sectional warping machine according to claim 8, characterized in that the control device (56) is coordinated with a main control device (72) for control of the sectional warping machine, respectively is integrated into such a main control device.
10. Sectional warping machine according to claims 8 or 9, characterized in that the control device (56) is coordinated with yarn monitors (7) which are allocated to each yarn (5).
11. Sectional warping machine according to one of the claims 8 to 10, characterized in that the control device (56) possesses switch elements, through the activation of which predeterminable working positions of the cross reed (16) and the guide rods (28, 29) are able to be adjusted.
12. Sectional warping machine according to one of the claims 8 to 11, characterized in that the control device (56) is coordinated with a screen (74), or with an optical display means, on which information concerning the working position of the cross reed (16) and the guide rods (28, 29) is able to be displayed.
13. Method of operating a sectional warping machine (3) with a height adjustable cross reed (16) for the formation of a yarn crossing and with two guide rods (28, 29) arranged, with reference to the direction of the yarns (5) running through, in front of the cross reed, which are arranged on both sides of the yarn warp and which are able to be moved towards one another in one plane for bringing together the yarn warp, according to claim 1, characterized in that, when returning the cross reed (16) from a yarn crossing position into a neutral running position, the warping drum (13) is rotated in such a way that the yarns (5) remain under tension.
14. Method according to claim 13, characterized in that the return speed of the cross reed (16) is selected in such a way that, with a preselected creep speed of the warping drum (13), the yarns (5) remain under tension during the entire return movement.

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