EP2126172B1 - Device for controlling the transverse movement of the warp threads of a textile weaving machine - Google Patents

Abstract

In order to solve the problem of not having enough space available for a large number of components and keeping the deflection of the electric motor small in a device for controlling the transverse movement of the warp threads of a textile weaving machine, particularly a textile weaving machine with single strand movements, the invention proposes to operatively connect the strands via power transmission elements having different lengths in a staggered or register-like way to an electric motor and to provide the electric motors with a ratio in relation to the strands such that the movement of the electric motors brings about a greater movement of the strands.

Description

Technical area

The invention relates to a device for controlling the transverse movement of the warp threads of a textile loom, in particular a textile loom with Einzellitzenbewegung, according to the preamble of claim 1.

State of the art

Devices for controlling the transverse movement of the warp threads of textile looms, in particular looms with single leash movement are basically known from numerous documents. In many of these publications, attempts are made to make appropriate proposals in order to be able to dispense with the problematic weaving of a shedding device jacquard machine.

From the EP 0 353 005 A1 a drive arrangement for the control of the transverse movement of the warp threads is known, in which with a linear motor guided over four revolving rollers, closed drive cable for the healds is proposed. The execution of in the EP 0 353 005 A1 However, disclosed invention encounters difficulties that are partly due to the fact that with a larger number of adjacent warp threads for a large number of linear motors, but also for the pulleys no sufficient space could be provided and on the other hand, that the deflection of there proposed linear motors with acceptable design was too small for the necessary transverse movement of the warp threads.

From the WO-A-98/24955 It is known to clamp the driving part of a weaving machine - in this case a strand or a shaft frame - between two spring parts and provide an electric drive which raises or lowers the driving part with the warp threads for shedding. From this invention, the proposal is also known, the arrangement described above as a cantilever in such a way that a large part of the kinetic energy from the elastic Spring force is applied, while the electric drive is provided rather as compensation for the energy losses and the control of the corresponding device. The execution with the two springs in the WO-A-98/24955 but also claimed a relatively large space, as can be seen from the drawings there. Furthermore, it seems difficult in the in the WO-A-98/24955 proposed arrangement to keep the electric motor on the one hand structurally small but on the other hand so powerful and powerful form that he will meet the requirements when a large number of adjacent warp threads of the shedding should be subjected.

Other publications, such as the WO 95/11327 or the WO 2006/114199 also deal with a cantilever arrangement, but without being able to solve the above problems.

From the EP 1 063 326 A1 are Seilantriebe-for the hurdles of a textile loom with Einzellitzenbewegung known, where it is proposed to wind the ropes on one side on electric motor driven pulleys and to keep curious on the other side by a coil spring mounted on the loom. The already known from the above-cited document principles of a cantilever with the device of the EP 1 063 326 A1 but not realized.

From the WO-A-2006/063584 Finally, a shedding device with monofilament control is known, in which - in principle known - a Hubfederrahmen or a stationary spring frame is proposed with a locking element for the individual strands. However, this type of shedding has proved to be prone to errors, since the said locking elements are prone to failure.

From the EP 0 347 626 A2 and the DE 198 49 728 A1 Electromotive drives for the shedding of weaving machines are known, which have a coil and a flat permanent magnet, with a rotational movement for the Training is proposed. In the EP 0 347 626 A2 In this case, a leverage (translation) is provided.

Presentation of the invention

The object of the invention is to improve a device for controlling the transverse movement of the warp threads of a textile loom, in particular a particular textile weaving machine with Einzellitzenbewegung.

The object is achieved by a device according to claim 1. The measures of the invention initially have a very small footprint at high weaving speed result. By the register-like fanning of the Litzenantriebe and by the spring support, it is possible to keep the electric drive motors small. The lever-like reinforcement also makes it possible for the drive path of these motors to be kept small.

Advantageous embodiments of the device are described in claims 2 to 13.

It is advantageous (claim 2), if an at least double translation is provided, that is, that a movement of the electric motors causes at least twice as large movement of the strands.

An embodiment with pull and push rods as power transmission elements for driving the drive elements, which may be conventional strands, but in particular cases also guide eyelets, which are attached directly to the pull and push rods offers - according to claim 3 - a simple embodiment of Invention.

An advantageous embodiment is proposed with a drive of the strands by cables as power transmission elements, which are connected to the electric motors, wherein the fan or register-like arrangement by means of pulleys (according to claim 4), or in a further advantageous embodiment by means of reversing levers with Hubübersetzung according to claim 5 is enabled. The pulleys or levers steer the ropes preferably by 60 ° to 120 °, most preferably by 75 ° to 105 °, in order to create as much space for the register-like fanning (claim 6). If two springs are used, one of the springs, for example, can be arranged on the side of the strands opposite the deflection rollers or levers and designed as conventional tension springs.

The kinetic energy of the strands can be provided mainly by springs. The springs are arranged so that they provide a large potential energy as a force at a first end position and at a second end position, which drives the strands in the direction of the other end position. In one position, the spring force disappears in a solution with a compression spring. In a solution with a compression and a tension spring or a solution with two opposite tension springs, the potential energies of the two springs cancel each other. During a movement, the strands have a maximum speed in a position which is advantageously the middle position. The strands are then moved further into the respective other end position, wherein the springs are then able to absorb the kinetic energy of the strands in the form of potential energy. In order to allow a controlled movement and an optional staying at the first or the second end position, respectively holding means are provided for the first end position and for the second end position, which stop the movement and hold the respective strand in the assumed end position. In order to enable a controlled movement, an optional switchable, electric motor is additionally provided. He overcomes together with the spring force, the holding force of the holding means and can thus free the strand from its holding position. Basically, the motor is therefore intended to release the holding means and initiate the movement process. Furthermore, the motor is used to compensate for energy losses and adapt the device to changing operating conditions. The control of the device is done by the control of the motor.

It is advantageous if at least 75% of the kinetic energy is taken from the spring or the springs and the electric motor at most 25% of the kinetic energy raises (claim 9). It is also advantageous if the holding means are formed uncontrolled as permanent magnets, which cooperate with Magnetgegenhaltern, being used as a magnetic counter-holder, the ends of the transmission lever (claim 10 and 11). Advantageously, no force is exerted on the strands in a third shed position between the high shed and the low shed position (claim 12). In a symmetrical arrangement, this will be a middle shed position (claim 13).

The above-mentioned as well as the claimed and described in the following embodiments, according to the invention to be used elements are subject to their size, shape design, material usage and their technical conception no special conditions of exception, so that the well-known in the respective field of application selection criteria can apply without restriction.

In particular, the invention is not limited to a textile loom with Einzellitzenbewegung. Rather, the invention can also be applied to a weaving machine, in which strands - e.g. through shafts etc. - are summarized.

Brief description of the drawings

Fig. 1

einen Litzenantrieb gemäss einem ersten Ausführungsbeispiel der Erfindung mit Zug- und Schubstangen, Speicherfeder und Drehmo- tor;

Fig. 2

eine Detaildarstellung des Drehmotors gemäss Fig.1;

Fig, 3

ein Kraftdiagramm für die Bewegungsabläufe der Kettfäden;

Fig. 4

einen Litzenantrieb gemäss einem zweiten Ausführungsbeispiel der Erfindung mit Zugfeder, Biegefeder, Seilelementen und Drehmotor;

Fig. 5

eine Detaildarstellung des Drehmotors gemäss Fig.4;

Fig. 6

einen Litzenantrieb gemäss einem dritten Ausführungsbeispiel der Erfindung mit Zugfedern, Seilelementen und Linearmotor; und

Fig. 7

eine Detaildarstellung des Linearmotors zu Fig.6.

Embodiments of a device for textile machines, in particular a textile loom with Einzellitzenbewegung are described below with reference to the drawings, in which:

Fig. 1

a strand drive according to a first embodiment of the invention with pull and push rods, memory spring and torque;

Fig. 2

a detailed representation of the rotary motor according to Fig.1 ;

Fig. 3

a force diagram for the movements of the warp threads;

Fig. 4

a strand drive according to a second embodiment of the invention with tension spring, spiral spring, rope elements and rotary motor;

Fig. 5

a detailed representation of the rotary motor according to Figure 4 ;

Fig. 6

a strand drive according to a third embodiment of the invention with tension springs, rope elements and linear motor; and

Fig. 7

a detailed view of the linear motor to Figure 6 ,

Ways to carry out the invention

A first embodiment for carrying out the present invention is shown in FIGS FIGS. 1 and 2 shown.

The FIG. 1 shows a device for driving the trained as entrainment parts of the warp threads 2 strands 4 a textile loom with Einzellitzenbewegung in side view. The warp threads 2 are moved by means of the thread eyes 3 having strands 4 so that they are - as shown in the exemplary embodiment - either in a high-skilled position or in a lower shed position. The strands 4 are arranged by means of couplings 36 on push and pull rods 30, each having a - to the neighboring rod - different lengths. As a result, the drive elements for the strands 4 can be arranged in a graduated or register manner. The graduated or register-like arrangement is provided here in a double manner such that the left half of the strands 4 is assigned to a left register of electric motors 32 and their associated elements, while the right half of the strands 4 a right register of electric motors 32 - quasi in mirror-symmetrical arrangement - and associated with these associated elements. The ends of the push and pull rods 30 are each attached to a knuckle 28, which is operatively connected to a designed as a swing motor electric motor 32. Each electric motor 32 has a coil 6 which is fastened to a coil carrier 20 pivotable about an axis 19. The bobbin is in turn arranged between two base plates 18. Each electric motor 32 further includes a permanent magnet plate 16. As a result of the polarity of a current flowing through the respective coil, the coils therefore assume one of two end positions, which are entered in the drawing are. These two positions correspond to the two positions "Hochfach" or Tieffach "the strands 4 and thus the shedding of the warp threads. 2

However, the position of the aforementioned elements is not free, but biased by a tension and compression spring 8, that at the two end positions "Hochfach" and Tieffach "directed away from the attacks spring force acts, while at a middle position of the coil 6 no spring force Two stop magnets 26 are arranged so that they form holding means for the two end positions "high-bay" and low-bay ".

Diagram 3 shows the force relationships of the elements described above. In this case, the spring force diagram 100 shows that the spring force of the tension and compression spring 8 around the central position in which it disappears is symmetrical and linear around. During a lifting or lowering movement of the strands 4, the largest proportion of energy is applied by the spring drive of the tension and compression spring 8. The movement is initiated by the electric motor 32.
As long as the electric motor 32 is not in operation, the corresponding strand 4 by the upper or by the lower stop magnet 26 in the upper or in the lower end position - which correspond to the Hochfachstellung or the lower shed position of the warp threads of a shed - held. This is achieved in that the stop magnets designed as permanent magnets 26 have a greater holding force 102 than the restoring force of the tension and compression spring 8 in the deflection at the end positions. It should be pointed out that the holding force of the stop magnets 26 is short-range and therefore only relevant at all in the vicinity of the lever 28 and thus only in or near the respective end position.

In order to set the strands 4 in motion, ie to initiate a movement from the upper to the lower end position or from the lower to the upper end position, the corresponding coils 6 are supplied with voltage and so the electric motor 32 is put into operation. The sum of the effective forces 104 of the electric motor and the spring force 100 of the tension and compression spring 8 in the deflected Condition, ie in one of the end positions, is greater than the holding force 102 of the corresponding stop magnets 26.

Now, if the holding force of the stop magnets 26 is overcome, the movement of the wire via the corresponding push and pull rod 30 is mainly caused by the spring force of the tension and compression spring 8, the electric motor 32 moves with this movement, without contributing significantly. When the other end position is reached, e.g. the lever 28 reaches the effective range of the lower stop magnet 26, then the new end position is reached and the tension and compression spring 8 remains deflected because the force of the permanent magnet 26 in this position is greater than the restoring force of the tension and compression spring 8 and Electric motor 32 latter not supported.

In the embodiment shown here, the tension and compression spring 8 is operated in the linear range, so that the spring force diagram 100 can be represented with a straight line. The spring force is only insignificantly supported by the warp thread 106 so that the warp thread 106 does not matter here. The striking magnet diagram 102 clearly shows the short range of the magnetic forces, which only act when the levers 28 are in close proximity to the stop magnets 26 and an end position is taken. The coil force diagram 104 of the electric motor 32 has a constant force in the operating mode described here, which can point in one direction or the other depending on the polarity.

In the embodiments described here, the electric motor 32 is designed so that in addition to the upper position and the lower position, a middle position of the strand 4 are taken and the strand 4 can be moved from this middle position to the upper position or to the lower position. This mode of operation has the purpose that a rest position can be taken in which the tension and compression spring 8 exerts no force on the push and pull rod 30 and the corresponding strand 4. The control of the strand 4 is carried out exclusively by means of the electric motor 32, which is connected thereto in a manner not shown with a control unit of a loom.

In FIG. 4 and in FIG. 5 a device for driving the strands of a textile loom with Einzellitzenbewegung is shown in side view according to a second embodiment.

In this embodiment, wire ropes 24 serve as tension elements. The wire ropes 24 are connected to the strands 4 in a conventional manner - for example by means of couplings - and each have a - to the neighboring rope - different length. As a result, the drive elements can in turn be arranged in a graduated or register manner. The staffel or register-like arrangement is also provided here in a double manner such that the left half of the wires 2 4 is associated with an upper register of a likewise designed as a swivel motor electric motors 32 and their associated elements, while the right half of the wire ropes 24 a associated lower register of electric motors 32 and the associated elements. The ends of the wire ropes 24 are also attached to an active lever 28 which is operatively connected to an electric motor 32. The electric motor is basically the same structure as in the first embodiment.

In this embodiment, the strands 4 are biased on the side facing away from the electric motor by a respective tension spring 12 in the lower shed position. The spring force against the tension spring 12 is effected in this embodiment by bending springs 10, which are arranged on the electric motor 32. In this case, the forces of the tension spring 12 and the bending spring 10 cancel each other in a middle position of the coils 6. Two stop magnets 26 are in turn arranged so that they form holding means for the two end positions "Hochfach" and " Tieffach". Otherwise, the conditions are the same or according to the first embodiment.

In FIG. 6 and in FIG. 7 is a device for driving the strands of a textile loom with Einzellitzenbewegung in side view according to a third embodiment shown.

In this embodiment, the wire ropes 24 also serve as tension members for the strands. The wire ropes 24 in turn each have a different length to the neighboring rope. As a result, the drive elements can in turn be arranged in a graduated or register manner. The staffel or register-like arrangement is provided here but in a simple way.

The ends of the wire ropes 24 are fixed about an axis on a pivotable active lever 22, which is operatively connected to an electric motor 34.

The difference from the second embodiment is here in particular that the cable deflection is not formed by deflection rollers, but by a pivotable about the axis active lever 22 which is coupled to the electric motor 34. The electric motor 34 is designed here as a linear motor. In this embodiment, the wire ropes 24 are biased by two tension springs 12 so that in both end positions "Hochfach" or " Tieffach" each spring force of a tension spring 12 acts. In this case, the forces of the tension springs 12 cancel in a middle position of the coils 6 of the electric motor 34. In turn, two abutment magnets 26 are arranged in such a way that they form holding means for the two end positions "high shed" and "shallow shed." Otherwise, the conditions are the same or corresponding to the first exemplary embodiment.

It should be emphasized for clarity that in the description of the invention and in particular in the description of the preferred embodiments, a distinction has been made between the strands 4 and the power transmission elements 24 and 30, respectively. The thrust and push rods 30 may also be continuous and thus form the strands with. Furthermore, the ropes 24 can have eyelets for passing through the warp threads and thus at the same time form the strands.

LIST OF REFERENCE NUMBERS

2

warp

3

thread eye

4

Strands with thread eye

6

Kitchen sink

8th

Tension and compression spring

10

Pressure spiral spring

12

mainspring

14

idler pulley

16

Permanent magnetic plate

18

baseplate

19

axis

20

coil carrier

22

Rope deflection with reduction to linear drive

24

Wire rope, tension element

26

stop magnets

28

lever

30

Push and pull rods

32

Electric motor, rotary motor

34

Electric motor, linear motor

36

clutch

100

Spring force diagram

102

Stop magnet graph

104

Coil force diagram

106

Kettfadendiagramm

Claims (13)

1. A device for controlling the transverse movement of the warp threads of a textile weaving machine, in particular of a textile weaving machine having individual heddle movement, with a multiplicity of driving parts (4) for warp threads, which serve for driving the warp threads and which in each case comprise a spring drive (8; 10, 12) having spring means and holding means, the holding force of the holding means (26) being opposite to the drive force of the spring drive (8; 10, 12) and being capable of holding the driving parts (4) in an upper shed position and in a lower shed position counter to the spring force, the driving parts (4), further, being operatively connected via force transmission elements (24, 30) in each case to an electric motor (32, 34), as a result of the activation of which a shed control by the driving parts (4) can be initiated, and the action of the holding means (26) being capable of being overcome by the sum of the forces of the spring drive (8; 10, 12) and of the electric motor (32, 34), characterized in that the driving parts (4) are operatively connected in each case to an electric motor (32, 34) in a staggered or register-like manner via force transmission elements (24, 30) of different length, and in that the electric motors (32, 34) have, as compared with the driving parts (4), a step-up such that a movement of the electric motors (32, 34) causes a greater movement in the driving parts (4).
2. The device as claimed in claim 1, characterized in that a movement of the electric motors (32, 34) causes an at least twice as great a movement of the driving parts (4).
3. The device as claimed in claim 1 or 2, characterized in that the driving parts (4) are operatively connected as heddles with pull and push rods (30) to an electric motor (32) by means of a step-up lever (28) arranged on the latter.
4. The device as claimed in claim 1 or 2, characterized in that the driving parts (4) are operatively connected to an electric motor (32) via drive cords (24), and in each case deflecting rollers (14) are arranged between the driving parts and the electric motors (32) together with spring elements of the spring drive (10, 12).
5. The device as claimed in claim 1 or 2, characterized in that the driving parts (4) are operatively connected to an electric motor (34) via drive cords (24), and in each case deflecting levers (22) with a stroke step-up are arranged between the driving parts (4) and the electric motors (34) together with spring elements of the spring drive (10, 12).
6. The device as claimed in claim 4 or 5, characterized in that the deflecting rollers (14) or the deflecting levers (22) with stroke step-up deflect the drive cords (24) through 60° to 120°, preferably through 75° to 105°.
7. The device as claimed in one of claims 4 to 6, characterized in that the driving parts (4) for the warp threads (2) are arranged on one side on fixedly arranged spring means (12) of the spring drives, which are opposite to the electric motors (32, 34) and the deflecting rollers (14) or the deflecting levers (22) with stroke step-up.
8. The device as claimed in one of claims 1 to 7, characterized in that the spring drives (8; 10, 12) are designed such that, when the driving parts (4) are operating at the characteristic frequency of the spring drive (8; 10, 12), the greater part of the kinetic energy can be obtained from the spring drive (8; 10, 12).
9. The device as claimed in claim 8, characterized in that the spring drives (8; 10, 12) are designed such that, when the driving parts (4) are operating at the characteristic frequency of the spring drive (8; 10, 12), at least 75% of the kinetic energy can be obtained from the spring drive (8; 10, 12).
10. The device as claimed in one of claims 1 to 9, characterized in that the holding means are designed as uncontrolled holding means with stop magnets, the stop magnets (26) being designed as permanent magnets.
11. The device as claimed in claim 10, characterized in that the lever ends for the step-up comprise magnetic stays for the holding means.
12. The device as claimed in one of claims 1 to 11, characterized in that, in a third shed position of the driving parts (4) between the upper shed position and the lower shed position, no force is exerted on the driving parts (4).
13. The device as claimed in claim 12, characterized in that the third shed position forms a middle shed position of the driving parts (4).

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