JPH09111597A - Controller for pile warp for manufacturing towel woven fabric by loom - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a control unit designed not to cause warp superposition and also not to cause knotting and warp breakage. SOLUTION: A correction shaft 8 is supported eccentrically and energized with spring load by a turning lever 48, and the force of the spring 46 is balanced with the tensile force of a warp 4. The spring 46 compensates the length of the warp at the time of shedding. The piston rod 52a of a working cylinder 52 is in action on the turning lever 48. Energization of the working cylinder 52 revolves the correction shaft 8 around an eccentrically placed shaft 14, resulting in preparation of an enough amount 54 of a pile warp to be provided without running the pile warp 4 afloat off the correction shaft 8. The working cylinder 52 is energized on one side due to weft picking, otherwise, on both sides due to edging weave.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to controlling the pulling force of pile warp yarns (polkettfaden) and loop formation in the production of towel fabrics on a loom according to the preamble of claim 1. The present invention relates to a control device for preparing a pile warp yarn provision portion for performing. DE-A 43 10 840 C1 discloses a method and a device for controlling the pulling force in a pile warp yarn group during the production of towel fabrics on a loom.

In controlling the tension of pile warp threads, the tension beam, also called the correction axis (Tanzerwelle), and its control play a very important role. The correction shaft device has the following problems in manufacturing a towel cloth. a) Prepare the rate of pile warp yarn length (Rate) for so-called product control. b) Compensating for warp length when forming the opening. c) Reserve pile pile warp yarns to form a row of loops for each striking of a group of reed threads. d) The current position of the correction shaft, which is oscillatably movable, with respect to the position of the stationary guide roller arranged in the pile warp yarn path between the pile warp winding and the correction shaft, is determined by the warp yarn tension measuring device. Used to determine the tension.

The compensating shaft device limits the dynamic movement of the loom with respect to a further increase in the output of the loom, ie with respect to an increase in the rotational speed.

Here, inter alia, mutual control in the path of movement of the pile warp thread behind the pile warp thread winding is carried out, such as the formation of guide rollers, the arrangement of the correction shaft and the synchronous control of the warp thread delivery device and its friction device. Dimensions of components,
Placement and synergy are important.

The limit of the dynamic movement is manifested in particular by the fact that the pile warp thread guided through the compensation shaft is unloaded in such a way that the pile warp thread is lifted off the surface of the compensation shaft during the time of weft thread striking. It In this case, the twist existing in this state and the warp threads crosses each other. Since humps are generated in the warp threads, the formation of fluff (Flor) is prevented, and the warp thread breakage is not eliminated. The warp delivery of the warp delivery device causes the pile warp material to oscillate between the pile warp winding and the staking edge of the fabric, which likewise adversely affects the regular guidance of the pile warp.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a control device for controlling the pulling force of pile warp yarns when preparing a towel fabric on a loom and for preparing a pile warp yarn supply portion. In order to further increase, the integration function of the correction axis is separated from it and made to be attached to the individual device. Another object of the invention is to sufficiently eliminate the vibration of the warp material during the delivery of the warp thread, and in particular during the striking of the weft thread group between the guide roller and the compensation shaft on the one hand and the guide roller and the pile on the other hand. It is to maintain a constant warp tension between the bobbin and the bobbin.

[0007]

According to the invention, the object is to have a support element rotatably arranged in a bearing on the side wall of the rear loom, each support element being vertically spaced from its axis of rotation. And a tensioning force-correcting shaft is supported, at least one friction drive known per se for moving the fabric is operatively connected to at least one supporting element, whereby the movement of the friction drive and the correction shaft Is achieved by the first control device such that there is a synchronous course of motion between the two.

A second aspect of the present invention resides in that the correction shaft is eccentrically supported by the support element, so that the shaft can be turned with respect to the rotation axis of the support element. Such a deflection is caused by the biasing of a deflection lever which is rigidly connected to the compensation shaft, whereby the compensation shaft encloses the compensation shaft by a predetermined amount of the pile warp thread, i.e. the so-called pile warp yarn donation, by which the pile warp thread is wound. It is ensured that the pile warp thread swings freely in the direction of fabric formation without relieving its thread tension so that it rises above the outer circumference of the compensation shaft.

A further feature of the present invention is that the free ends of the compensating shaft are interlocked with a spring tensioning mechanism which allows the tension of the warp to be adjusted so that the compensating shaft and thus the pile warp yarn is given a tension which is in balance with its necessary basic tension. Being connected.

The spring tensioning mechanism ensures that the pile warp length compensation is performed during opening formation by an action independent of the friction drive.

A further feature of the invention is that each spring tensioning mechanism is acted upon by a control actuation unit, in particular an air piston cylinder. This piston / cylinder has a pile warp thread at a predetermined time point in the weaving process, that is, immediately before weft thread group striking, with the pile warp thread tension being maintained around a rotation axis that is eccentrically arranged with respect to the correction axis. It functions to oscillate so that a predetermined pile warp yarn provision amount is made available while the weft yarn group is being struck. Even if the necessary pile warp yarns are provided, the correction shaft does not float up in the direction of the fabric by the pile warp yarns when it is partially unloaded due to spring retraction, and it simply swings around its rotation axis. At the same time, the advantageous effect is obtained that the required tension of the pile warp yarn is maintained.

A further subject matter of the invention is that the spring tensioning mechanism is at least one deflection lever rigidly connected to the correction shaft. One end of at least one spring is hinged to the free end portion of the deflection lever and the other end of the spring is connected to a tension bolt which is connected to a support element. The tension bolt is further connected to a threaded spindle which is carried by the support element and which is used to adjust the spring tension. The threaded spindle is connected to suitable drive means, for example an electric drive, in order to adjust the required spring tension.

A warp tension measuring device arranged in the area of the pile warp between the correction shaft and the guide roller detects the warp tension to be maintained between the guide roller and the correction shaft. The warp thread tension value is recognized via a suitable optical indicator, in some cases the tension is manually adjusted via a threaded spindle, or within the loom controller within the framework of the target / actual value comparison. The setpoint value is fed as an analog signal to a tensioning motor connected to a threaded spindle.

Further, the gist of the present invention is to guide the pile warp thread continuously prepared by feeding out the warp thread of the pile warp thread to the weaving process while maintaining a constant pile warp thread tension between the guide roller and the correction shaft. For this reason, the guide roller is connected to the motor drive. What is important here is that the drive of the guide rollers is likewise controlled in relation to the tension values determined by the tension measuring device.

The motor-controlled guide roller has the advantageous effect that it influences the warp tension in the pile warp section between the pile warp winding and the guide roller and in the pile warp section between the guide roller and the correction shaft. To do. This action suppresses the vibration of the pile warp yarn in the pile warp yarn portion.

[0016]

DETAILED DESCRIPTION OF THE INVENTION The present invention will be described in detail below with reference to the embodiments shown in the drawings.

In FIG. 1, a pile warp bobbin 2 is placed at a high position of the loom 1 and is supported by a support 3 so as to be rotatable about an axis which is not visible in the figure. A pile warp yarn (Polkett faden) 4 from the pile warp yarn winding 2 using a known warp yarn feeding device (not shown) in a known manner.
Is guided to a guide roller 5 driven by a motor through a tension roller 7 which is supported by the support 3 and whose displacement can be adjusted in the direction of a double arrow 6.

The pile warp thread 4 is then fitted with a correction axis (Tanzerwel
le) Reach 8. The correction shaft 8 is supported on a support element 9, which is rotatably supported on a bearing 11 on the rear side wall 10 by means of a shaft pin 12 connected thereto. The support element 9 is formed in the form of a rectangular lever having vertical legs 9a and horizontal legs 9b. The shaft pin 12 is firmly connected to the range of the free ends of the legs 9a. Each leg 9a has a bearing 13 at a distance from the central axis 12a of the shaft pin 12 (see also FIG. 2). A shaft 14 that is rigidly coupled to the correction shaft 8 and is eccentrically arranged with respect to the center axis 8a of the correction shaft 8 is rotatably supported by the bearing 13. Bearing 13
One end of the connecting rod 16 is supported by the hinge 15 existing on the upper side of, and the other end of the connecting rod 16 is connected to a friction drive device 17 known per se. Here, the hinge 15 is a long hole 9c.
(See also FIG. 3). The friction drive is used to control the oscillatory movement of the fabric 18 relative to the fixedly located wetting point 19. The score point 19
A group of weft threads (not shown) is struck by a reed 21 that is swingably supported about a rotary shaft 20.

The known friction drive 17 comprises a friction shaft 23, on which at least one eccentric wheel 24 is provided.
Are fixedly arranged, and the contact roller 26a supported by the control lever 26 is in contact with the cam track of the outer peripheral surface thereof. A first connecting rod 27 is hingedly connected to the control lever 26, and the connecting rod 27 is connected to a second connecting rod 29 via a connecting member 28. The connecting rod 29 is hinged to a lever 31, which connects the fabric 18 with the double arrow 3.
It is connected to a feed roller 32 which oscillates in the direction of 0, the connecting member of which is not shown.

A base warp winder 41 is rotatably supported on the rear side wall 10 of the loom 1 to provide the base warp yarn 40. The basic warp thread 40 is guided from the basic warp thread winding 41 to the opening forming mechanism via the guide roller 42 and the backrest 43. This aperture-forming mechanism is shown here implicitly by a jacquard device 39 with a Harnischschnuren 38 and a return tension spring 37. The backrest 43 is here provided with a spring 47a in order to carry out a basic friction movement based on the so-called friction drive 17.
It is supported at one end of a double lever 47 that is loaded by. The double lever 47 is supported by the rotation point 47b.
The rotation point 47b exists on the single-armed lever 45 that can swing about a shaft 45a fixed to the machine. A connecting rod 44 is hinged to the free end of the lever 45, which connecting rod 44 is operatively connected to the control lever 26 of the friction drive 17.

FIG. 2 shows another feature according to the present invention.

A support element 9 consisting of a horizontal leg 9b and a vertical leg 9a is rotatably supported by a shaft pin 12 on the left and right side walls 10 at bearings 11. The connecting rod 16 connecting the support element 9 to the friction drive 17 has a vertical leg 9a.
Is supported by a hinge 15. As a result, the frictional movement is transmitted to the support element 9 in synchronization with the rotational drive of the eccentric wheel 24 via the contact roller 26a connected to the control lever 26. Bearings 13 are provided on the support element 9 at intervals in the direction perpendicular to the central axis of the shaft pin 12. A shaft 14 rigidly coupled to the correction shaft 8 is supported by the bearing 13 so as to be eccentric with respect to the center axis 8a of the correction shaft 8 and rotatable about the center axis 14a. This shaft 14 extends on both sides of the correction shaft 8 in the form of a tube into it by the required length dimension. A turning lever 48 formed in a U-shape on the outer periphery is fixedly arranged in the free end range on both sides of the correction shaft 8. The deflection lever 48 is acted on by one end of at least one tension spring or tension lap spring 46.
The other end of the spring 46 is hinged to a spring tensioning mechanism 51 present on the horizontal leg 9b of the support element 9. The spring tensioning mechanism 51 is supported on the horizontal legs 9b of the support element 9.
As a result, the friction drive device 17 via the connecting rod 16
Although the transmission of the control movement of the pile causes the turning of the support element 9 in the direction of unloading the pile warp thread, the correction shaft 8 for tensioning the pile warp thread 4 only makes it possible for the pile thread to hit the pile warp thread immediately before the pile strike. It is achieved to control and prepare the pile warp yarn supply while maintaining the tension of the warp yarn.

FIG. 3 shows the deflection position of the compensation shaft 8 and the deflection position of the support element 9 during the driving of the weft thread by means of the reed 22 shown in FIG. Friction drive 17
Here swings the support element 9 via the connecting rod 16 about the shaft pin 12 in the bearing 11 in the direction of the arrow 55. At the same time, by actuating an actuating unit 52, for example a double-acting pneumatic piston cylinder, which is hinged to a fixed point 53 of the loom in the direction of arrow 49, a deflection lever 48, which is rigidly connected to the correction shaft 8 by a piston rod 52a, is provided. A pushing movement occurs in the connecting element 50. In that case, the correction axis 8 is the central axis 1 of the axis 14 which is rigidly connected to it.
Swing about 4a to free the pile warp yarn provision 54. Due to the eccentric support of the correction shaft 8 and the correction shaft 8 whose spring load is partly reduced by the piston-cylinder unit 52, the pile warp thread 4 does not disadvantageously float above the outer peripheral surface of the correction shaft 8. Similar to FIG. 1, in FIG. 3, a pile warp / tension measuring device 56 is integrally provided in the pile warp yarn range between the guide roller 5 and the correction shaft 8. This measuring device 56 is formed here, for example, as an absolute sensor and is connected in signal communication with an electronic control unit (not shown) of the loom.

By comparing the target value and the actual value of the warp thread tension in the control device, the delivery of the pile warp thread is controlled, whereby the pile warp thread tension is adjusted in a known manner. Further, when the warp thread tension deviates from the target value, the spring tension mechanism 51 adjusts and adjusts the tension of the spring 46. For this purpose each horizontal leg 9b of the support element 9 is
There is a connecting link guide 57 in which a pull bolt 59 connected to a threaded spindle 58 is guided. The tension bolt 59 has a side guide element 60 in surface contact with the outer side surface of the leg 9b. The free end of the threaded spindle 58 is equipped with a motorized adjustment device 61 as shown in FIG.

FIG. 4 shows a mechanism 51 for tensioning the spring 46 connected to each support element 9. The threaded spindle 58 is, for example, rigidly connected to the support element 9 and supported on a receptacle 62, only part of which is shown. The threaded spindle 58 is threadedly coupled to a threaded portion (not shown) having, for example, an internal thread. This threaded part is a structural part of the tension bolt 59 under the action of the spring 46. The free end of the threaded spindle 58 is here connected to a controllable motorized adjustment device 61. By adjusting the threaded spindle 58 electrically or manually, the tension of the spring 46 hinged to the connecting element 50 of the turning lever 48 and the tension bolt 59 and thus to the pile warp thread 4 surrounding the compensation shaft 8 is applied. The tension of the correction shaft 8 can be adjusted.

FIG. 5 shows the action of the actuating unit 52 on the compensation shaft 8 to prepare the pile warp yarn provision 54 before the reed 22 shown in FIG. 1 strikes the weft yarn group. The actuating unit 52 is formed as a double-acting air piston cylinder. The piston rod side cylinder chamber 52b and the piston side cylinder chamber 52c are connected to high speed exhaust valves 63 and 64, respectively, which are controlled. Inlet pipe or outlet pipe 6 leading to each valve 63, 64
5, 66 communicate with pressure sources (not shown) via controllable valves 67, 68 and tubing 69. By supplying to the cylinder chamber 52c on the piston side, the spring 46 is passed through the turning lever 48 connected to the piston rod 52a.
The correction shaft 8 is turned while partially unloading the tension of the pile warp, and the pile warp yarn supply portion 54 is freed to form a loop row in the process of striking the weft yarn group. The formation of weft yarn groups is not carried out as is known in the art for weaving. Therefore, it is not necessary to prepare the pile warp yarn supply portion 54. In order to form the trim, the cylinder chamber 52b on the piston rod side is continuously supplied with pressure during the trimming weave, or at least the movement of the piston rod 52a is restricted.

[Brief description of the drawings]

FIG. 1 is a schematic side view of a loom including a control device.

FIG. 2 is a perspective view of a warp winding side portion of a loom including a control device.

FIG. 3 is a partial side view corresponding to FIG. 1 in a state where a pile warp yarn provision portion is prepared.

FIG. 4 is a view of a spring tension mechanism including an electric drive device for adjusting a spring restoring force.

FIG. 5 is a view of a pneumatically controlled actuation unit connected to a spring tensioning mechanism.

[Explanation of symbols]

 1 Loom 2 Pile warp winding 3 Holder 4 Pile warp 5 Guide roller 8 Correction axis 8a Center axis 9 Support element 9a Vertical leg 9b Horizontal leg 9c Longitudinal guide or slot 11 Bearing 12 Shaft pin 12a Center axis 13 Bearing 14 Shaft 14a Central axis 16 Connecting rod 17 Friction drive device 18 Textile 19 Hitting point 22 Reed 39 Jacquard device 40 Basic warp thread 41 Basic warp thread winding 42 Guide roller 43 Backrest 44 Connecting rod 46 Tension spring 48 Turning lever 50 Connecting element 52 Actuation Unit 54 Pile warp yarn supply 56 Pile warp tension measuring device 58 Spindle with screw

Front Page Continuation (72) Inventor Adnan, Harkhort Lindau-Germany, Germany Bodeltz, Weyerweg, 6 (72) Inventor Peter, Chula Wangen, Lange, Gasse, 25 (72) Inventor Hans- Dieter, Skoller Lindau, Bayerstraße, Germany, 19 (72) Inventor Josef, Here, Herbrands, Austria, Bakkenloiter, Strasse, 25 (72) Inventor Werner, Birner Lindau-Bodolz, Doctor-Emile -Hazel-Gitling, 30

Claims (14)

[Claims] 1. A pile warp thread (4) is continuously fed from a pile warp winding (2) through at least one guide roller (5) and a correction shaft (8) while maintaining tension of the pile warp thread. , Before striking the weft threads with the reeds (22) and with the striking edges (1) of the fabric (8).
9) the pile warp thread provision (5) before the weft thread group is driven in the direction of the driving position of the sacks (22).
In a control device for controlling the pulling force of the pile warp yarn (4) and for preparing the pile warp yarn supply portion when manufacturing a towel fabric on a loom such as that of (4), the guide roller (5) is controlled. A guide roller (5) has a roller surface which provides a frictional force to the pile warp thread (4) surrounding it, which is interlocked with a possible electric drive and has its central axis ( 8a) is eccentric to the shafts (14) so that they are rigidly connected and these shafts (14)
Are respectively rotatably supported on the support element (9),
Each support element (9) has a shaft pin (12) which is rotatably supported on a mechanically fixed bearing (11) at a distance from the bearing (13) of the shaft (14), and a compensation shaft (8). At its free ends, at least one deflection lever (48) is actuated by at least one spring (46), which spring (46) on the one hand connects the coupling element (5) of the deflection lever (48).
0) on the other hand, hinged to tension bolts (59), which are adjustably formed on the support elements (9), each support element (9) being movably hinged to these support elements (9). At least one actuating unit (52), which is operatively connected to a friction drive (17) known per se via at least one connecting rod (16) and which oscillates a spring-loaded deflection lever (48); In order to control the pulling force of the pile warp yarn (4) and to provide the pile warp yarn in the production of a towel weave by a loom characterized by being controllably arranged on each turning lever (48). Control device for preparing. 2. A deflection lever (48) is attached to a spring (46) and a support element (9) on a threaded spindle (58) which is received in a link guide (57) and is supported on the support element (9). Pull bolts (59) interlockingly connected
2. A control device according to claim 1, characterized in that a spring tensioning mechanism (51) is formed together therewith. 3. Control device according to claim 2, characterized in that each threaded spindle (58) is connected to an electric adjustment device (61). 4. Controller according to claim 2, characterized in that the threaded spindle (58) comprises means for manual operation. 5. An electronic control unit of the loom (1) is an adjusting device (6).
4. Control device according to claim 3, characterized in that 1) is controlled synchronously and the threaded spindle (58) is driven synchronously. 6. A pile warp thread (4) runs through a warp thread tension measuring device (56) between a guide roller (5) and a compensation shaft (8) and is known in relation to the measured tension value. The warp thread delivery control device is controlled in this way, and in addition the control device (61) of the spring tensioning mechanism (51) or the control device of the electrically driven guide roller (5) is controlled. The control device according to item 1. 7. Control device according to claim 1, characterized in that an electrically driven guide roller (5) is signal-transmitted to the electronic control unit of the loom (1) and controlled in relation to the warp tension. . 8. Single-acting or double-acting actuating unit (52) hingedly connected on the one hand to a suitable mechanical fixing point (53) and on the other hand to a connecting element (50) of a turning lever (48). 2. The control device according to claim 1, wherein the control device is a pneumatic piston / cylinder. 9. The control device according to claim 1, wherein the electric drive device for the guide roller (5) is a constant rotation type DC motor integrated with the guide roller (5). 10. Control device according to claim 1, characterized in that the support element (9) is formed by a vertical leg (9a) and a leg (9b) arranged horizontally thereto. 11. Hinge points on the connecting rod (16) support elements (9) for adjusting the basic friction movement of the compensation shaft (8).
2. Control device according to claim 1, characterized in that it can be adjusted in the slot (9c). 12. Control device according to claim 11, characterized in that the adjustment of the hinge points (15) is carried out manually or automatically via a threaded spindle connected to the connecting rod. 13. Control according to claim 1 or 8, characterized in that the actuating unit (52) is biased on the piston side in synchronism with the frictional movement of the friction drive (17) in order to produce a towel fabric. apparatus. 14. A friction drive (1) only on the piston rod side so that the actuating unit (52) produces a smooth fabric.
9. The control device according to claim 1, wherein the control device is biased in synchronization with the frictional movement of 7).