JP2010100986A - Apparatus at draw frame having drawing mechanism having means for adjusting and for doubling and drafting of fiber slivers - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an apparatus at a draw frame that allows a considerable reduction in the work and time required for adjustment of the extent(s) of the drawing zone(s). <P>SOLUTION: In the apparatus at a draw frame having a drawing mechanism for the doubling and drafting of fiber slivers, at least one pulley wheel (40, 41, 42, 43, 44, 45, 46) and a tensioned drive element 47 are used for adjusting a mounting device (33a, 34a, 35a, 36a), wherein a moving force applied to the pulley wheel or to the drive element 47 can be converted into the adjusting movement for the mounting device (33a, 34a, 35a, 36a). <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention has a stripping mechanism frame for accommodating a stripping mechanism frame having at least two pairs of rollers each including an upper roller and a lower roller, and at least one lower roller is spaced from another lower roller. Means for adjusting and in each case a mounting device for receiving the lower roller, the lower roller being driven by at least one drive element that rotates endlessly around the pulley wheel, The present invention relates to an apparatus in a drawing machine having a drawing mechanism for fiber sliver doubling and drafting.

  In a known device (DE-OS 20 44 996), the inlet lower roller and intermediate lower roller mounts move on the machine frame so that the length of the kneading section can be adapted to a specific fiber staple. Is possible. The tension pulley wheel, which can be moved in the machine frame slide groove, is subject to the length of the toothed belt according to the change in the distance between the axis of the intermediate roller and the axis of the guide pulley wheel caused by the movement of the inlet roller. Can be changed. The intermediate roller is driven by another toothed belt. This latter toothed roller is held in tension by a tension pulley wheel that is fixed to the machine frame and that can pivot about a single axis. As a result of this, this toothed belt can also be adapted to changes in the spacing between the inlet roller axis and the intermediate roller axis. A moving device for moving the entrance and intermediate rollers and an additional pulling device for re-tensioning the toothed rollers after the movement of these rollers is necessary and therefore high The disadvantage is the need for manufacturing costs. Furthermore, it is disadvantageous that several working steps are required for such a transfer operation and a subsequent re-tensioning operation. The belt tension is lost by this moving operation. When the roller is moved manually, a spacer is inserted between the mounting base and the mounting base is pressed against the spacer. In this case as well, the amount of setup work is considerably large. Finally, such movement and re-tensioning operations result in a doubling of potential error sources when setting the spacing and belt tension.

DE-OS 2044996

  The problem underlying the present invention is therefore to avoid the above-mentioned drawbacks, to have a very simple structure and to adjust the length of one or more sliders and thus of one or more strip sections. It is to provide a device of the kind described at the beginning which makes it possible to greatly reduce the work and time required to do so.

  According to the present invention, there is provided a drawing mechanism frame for receiving a drawing mechanism frame having at least two pairs of rollers each including an upper roller and a lower roller, and the distance between at least one lower roller with respect to another lower roller is set. Means for adjusting and in each case a mounting device for receiving the lower roller, the lower roller being driven by at least one drive element that rotates endlessly around the pulley wheel, A device in a drawing machine having a drawing mechanism for fiber sliver doubling and drafting, wherein at least one pulley wheel and a tensioned drive element are used to adjust the mounting device, and the pulley wheel Alternatively, a device is provided, characterized in that the moving force applied to the drive element can be converted into an adjustment movement for the mounting device.

  The measure according to the invention makes it possible to adjust the mounting base and thus the length of the strip section (nip line spacing) in a short time by simple means. In order to adjust the length of the drawing section, existing structural elements that must be included in the drawing machine, namely the pulley wheel and the drive belt, are used cleverly. A separate device for adjustment is not necessary. Since the drive belt is in tension before, during and after adjustment, there is no need for a separate device to return the drive belt to tension after adjustment, thus making the structure extremely simple By such means, it becomes possible to change the length of the drawing section of the drawing machine within a short time.

  Claims 2 to 58 include advantageous advances provided by the present invention.

  In the following, the invention will be described in more detail with reference to exemplary embodiments shown in the drawings.

FIG. 2 is a schematic side view of an auto-leveler drawing machine for a device according to the invention with a schematic circuit diagram. It is a perspective view which shows the movable attachment of an entrance lower roller and an intermediate | middle lower roller. FIG. 2 is a side view showing a driving device for an inlet lower roller and an intermediate lower roller for the drawing machine according to FIG. 1. FIG. 2 is a plan view showing a driving device for an inlet lower roller and an intermediate lower roller for the drawing machine according to FIG. 1. It is sectional drawing of a toothed belt. 2 is a schematic diagram illustrating a first stage of a continuous procedure for shortening a preliminary draft section and a main draft section. 4 is a schematic diagram illustrating a second stage of a continuous procedure for shortening a preliminary draft section and a main draft section. Fig. 4 is a schematic diagram illustrating a third stage of a continuous procedure for shortening a preliminary draft section and a main draft section. FIG. 6 is a schematic diagram illustrating a fourth stage of a continuous procedure for shortening a preliminary draft section and a main draft section. It is the schematic which shows the entrance lower roller and intermediate | middle lower roller before a movement. 6 is a schematic diagram showing an inlet lower roller and an intermediate lower roller after movement. 1 schematically shows an electromagnetic braking device for a toothed belt wheel. 1 schematically shows an electromagnetic braking device for a toothed belt wheel. 1 is a schematic diagram showing an anchoring device for a slider. 1 is a schematic diagram showing a coupling element (bridge) coupling two sliders. 1 is a schematic diagram showing an embodiment comprising a drawing mechanism having a combination of three rollers, each roller having its own drive motor. 1 is a schematic diagram showing an input device for manual input of adjustment values for changing the nip line spacing in the drawing mechanism and / or input using a storage device. 1 is a schematic diagram showing an upper roller being lifted and separated from a lower roller.

  In FIG. 1, a drawing machine 1 such as a Trutzschler HSR drawing machine has a drawing mechanism 2, and an inlet 3 for the drawing mechanism is provided upstream of the drawing mechanism 2. An outlet 4 from the drawing mechanism is provided downstream of the drawing mechanism 2. A fiber sliver 5 fed from a can (not shown) enters the sliver guide 6 and is moved in such a way that it is extracted by extraction rollers 7, 8 and is passed through a measuring element 9. The drawing mechanism 2 is designed as a 4/3 wire type drawing mechanism, that is, this drawing mechanism has three lower rollers I, II and III (roller I is a lower delivery roller, roller II). Is an intermediate lower roller, and roller III is an inlet lower roller) and four upper rollers 11, 12, 13, and 14. A draft of a fiber sliver combination 5 ′ from a plurality of fiber slivers 5 is performed in the drawing mechanism 2. The draft is composed of a preliminary draft and a main draft. Roller pair 14 / III and roller pair 13 / II form a preliminary draft section, and roller pair 13 / II, roller 11 and roller pair 12 / I form a main draft section.

  A plurality of thinned fiber slivers 5 reach the web guide 10 in the exit 4 from the drawing mechanism, and are further drawn out by a draw roller 15, 16 through a sliver funnel 17 and the sliver funnel A plurality of fiber slivers are combined therein to form one fiber sliver 18 and then placed in a can. A reference symbol A indicates the direction of machining.

  For example, the take-out rollers 7, 8 and the entrance lower roller III and the intermediate lower roller II, which are mechanically coupled to each other by means of a toothed belt, are driven by a control motor 19 so that a desired value is specified during processing. Is possible. (The associated upper rollers 14, 13 are each rotated by the movement of the lower roller). The lower delivery roller I and the extraction rollers 15 and 16 are driven by the main motor 20. Each of the control motor 19 and the main motor 20 has its own control device 21, 22 respectively. Control (rotational speed control) is performed in each case by a closed control loop, the tachometer generator 23 is associated with the control motor 19 and the tachometer generator 24 is associated with the main motor 20. At the inlet 3 of the drawing mechanism, a variable proportional to the mass of the fiber sliver 5 fed in, for example the cross-sectional area of the fiber sliver, is measured by an inlet measuring element 9 known from DE-A-44 04 326, for example. . At the outlet 4 from the drawing mechanism, the cross-sectional area of the delivered fiber sliver 18 is confirmed by an outlet measuring element 25 associated with the sliver funnel 17 known from DE-A-195 37 983. A central computer unit 26 (control and regulation device), for example a microcomputer with a microprocessor, sends settings to the control device 21 for the desired values for the control motor 19. The measured values of these two measuring elements 9, 25 are sent to the central computer unit 26 during drawing. The desired value for the control motor 19 is determined in the central computer unit 26 from the measured value of the inlet measuring element 9 and the desired value for the cross-sectional area of the delivered fiber sliver 18. The measured value of the outlet measuring element 25 is used for monitoring the delivered fiber sliver 18 (delivery sliver monitoring). By appropriately adjusting the drawing process using this control system, it is possible to correct the variation in the cross-sectional area of the fiber sliver 5 to be fed, and the fiber sliver can be made more uniform. . Reference number 27 indicates a display monitor, reference number 28 indicates an interface, reference number 29 indicates an input device, reference number 30 indicates a pressure bar, and reference number 31 indicates a storage device.

  In FIG. 2, the trunnions Ia, IIa, IIIa (see FIG. 3b) of the lower rollers I, II, III are mounted so as to be able to rotate in the mounting bases 32a, 33a, 34a. (32b, 33b, 34b are located on the opposite side of the drawing mechanism and are not shown in this figure). The mounting bases 33a and 34a are respectively bolted onto sliders 35a and 36a that are movable in the directions of arrows C and D and arrows E and F along the rod 37a. Both ends of the rod 37a are fixed in a mounting block 38 '(38 "is not shown) attached to the frame 39 of the machine.

  The sliders 35a and 35b and the sliders 36a and 36b are moved in the directions indicated by the arrows C and D and the arrows E and F respectively at the same time in the mounting bases 33a, 33b and the mounting bases 34a, 34b. To be moved to. The associated upper rollers 13, 14 are moved in a corresponding manner (not shown in the figure) in directions C, D and E, F, respectively. Thus, the nip line spacing between the roller combinations is changed and set.

  The sliders 35a and 35b and the sliders 36a and 36b are fixed by a catch device, a stop device, or the like (see FIG. 7).

  In FIG. 3a, the lower rollers II, III are viewed from the right side of the drawing machine when viewed in the material flow direction A by a common loop mechanism in the form of toothed belt wheels 40, 41 and toothed belt 47. Driven. Different rotational speeds of the lower rollers II, III are obtained by the drive gears of the drive trunnions IIa, IIIa with different numbers of teeth. The toothed belt 47 travels in the direction B (ie, the direction opposite to the machining direction) on a control drive which is in the form of a servo motor 19. The lower roller I is driven from the left side of the drawing machine by a loop mechanism in the form of a toothed belt wheel and a toothed belt 47 '. For this purpose, the toothed belt 47 ′ passes on the left side in the direction G from the toothed belt disk 40 in the lower roller I onto the servomotor 20.

  During operation, ie when the fiber sliver is moving in direction A, the toothed belt 47 moves in direction G. Starting from a toothed belt wheel 47 arranged on the drive motor 19, the toothed belt wheel 47 comprises a toothed belt wheel 45, a smooth guide pulley wheel 46 and a toothed belt wheel 40 (for the lower roller III). The roller driving pulley wheel), the toothed belt wheel 41 (the roller driving pulley wheel for the lower roller II), the smooth guide pulley wheel 42, and the toothed belt wheel 43 are continuously passed. The toothed belt 47 is securely engaged with the toothed belt wheels 40, 41, 43, 44, 45 by the teeth. The smooth side surface (back side) opposite to the toothed side surface of the toothed belt 47 is in contact with and engaged with the smooth guide pulley wheels 46 and 42. The toothed belt 47 is hung around all of the pulley wheels 40-46. During operation (when the fiber sliver is passing in the direction A during the draft), the toothed belt wheels 40, 41, 43, 44, 45 rotate clockwise and the guide pulley wheels 42, 46 rotate counterclockwise. Rotate to.

  The toothed belt wheels 40 and 41 are associated with the mounting bases 34a and 33a, respectively, while the guide pulley wheels 42 and 46 are rotatably mounted on the sliders 35a and 36a, respectively. By means of a rigid connection (for example, by bolts) between the mounting base 34a and the slider 36a and between the mounting base 33a and the slider 35a, the toothed belt wheels 40 and 41 are respectively connected to the lower rollers II and III. One of the pulley pulleys 46 and 42 is associated with each other. The toothed belt 47 on the one hand passes around the pulley wheels 40, 46 and on the other hand passes around the pulley wheels 41, 42 in the form of a mirror image (see FIG. 3b).

  A section between the roller pair 13 / II and the roller pair 14 / III is represented as VV (preliminary draft), and a section between the roller pair 12 / I and the roller pair 13 / II is represented as HV (main draft) ( See Figure 4a). In FIG. 3a, if the nip line spacing between roller pair 14 / III and roller pair 13 / II must be increased, at least one roller pair must be pulled away from each other roller pair. For this purpose, the slider 35a may be moved in the right direction, and this movement can be performed by the following two methods. (A) The sticking of the slider 35a is released. A pulley wheel, for example, a toothed belt wheel 47 is stopped so that it cannot rotate. This stop can be realized, for example, by mechanical means or electromagnetic means. As a result of this, the toothed belt 47 is stationary and cannot be moved. Next, the toothed belt wheel 41 is manually rotated counterclockwise using, for example, a crank or the like, and at this time, the guide pulley wheel 42 is necessarily rotated clockwise. In this process, the rotational movement of the toothed belt wheel 41 is converted into the longitudinal movement of the slider 35a in the direction C, so that the toothed belt wheel 41 and the guide pulley wheel 42 are in contact with each other. Wrapping along the opposite surface will cause the toothed belt 47 to be “shortened” in one pulley wheel and the toothed belt 47 “lengthened” in the other pulley wheel. The belt length required for this “wrapping” in the toothed belt wheel 41 is provided in the guide pulley wheel 42. Thereby, the lower roller II is moved in the direction C by the slider 35a and the mounting base 33a. (B) The sticking of the slider 35a is released. The toothed belt 41 is stopped so that it cannot rotate. As a result, the guide pulley wheel 42 is necessarily stopped. Next, clockwise rotation is caused by the drive motor 19. The toothed belt 47 advances in the direction G. In this case as well, the belt 47 is “shortened” in one pulley wheel, and the belt 47 is “lengthened” in the other pulley wheel. The belt length actually required between the toothed belt wheel 40 and the toothed belt wheel 41 is provided between the toothed belt wheel 43 and the pulley wheel 42. Thereby, the rotational movement of the toothed belt wheel 44 and the movement of the toothed belt 47 are converted into a vertical movement in the direction C of the slider 35a. As a result, the lower roller II mounted in the mounting base 33a (rigidly coupled to the slider 35a) is also moved in the direction C.

  As shown in FIGS. 4a to 4d, in practice, the preliminary draft section VV is first changed, and then the main draft section HV is often changed. When shortening the draft sections VV and HV, the slider 36a is moved in the direction of arrow E from the position shown in FIG. 4a to the position shown in FIG. 4b. As a result, the nip line interval in the preliminary draft section VV is shortened from “a” to “a ′”. Next, as shown in FIG. 4 c, the sliders 36 a and 35 a are rigidly connected to each other by the bridge 50. Finally, as shown in FIG. 4d, the sliders 36a and 35a, which are rigidly connected to each other, move from the position shown in FIG. 4c to the position shown in FIG. It is moved in the direction. As a result, the nip line interval of the main draft section HV is shortened from “b” to “b ′”. The same procedure is used to lengthen the preliminary draft section and the main draft section, that is, the sliders 35a and 36a coupled to each other are moved in the directions of arrows F and D (see FIG. 2). As a result, the main draft section HV becomes longer. Next, the sliders 35 a and 36 a are separated from the bridge 50. Finally, the slider 36a is moved in the direction of arrow F (see FIG. 2), resulting in a lengthening of the preliminary draft section VV.

Regarding the fiber sliver 5 in the drawing mechanism 2, when the draft sections VV and HV are shortened, the fiber sliver 5 ^IV is slightly in the direction B upstream of the roller pair 14 / III as shown in FIGS. 4a and 4b. However, due to the length of the distance between the transport rollers 7, 8 and the roller pair 14 / III (about 1.5m), this extension is It has no significant meaning. In the case of shortening, no slacking ring occurs in the pre-draft section VV, which means that the drive for both of these roller pairs in the case of movement with respect to roller pair 14 / III and roller pair 13 / II. This is because one or both roller pairs are rotatable because they are connected to each other by the toothed belt 47. In contrast, when the main draft section HV is shortened, a slack ring is formed in the fiber sliver 5 ″, and the slack ring is formed by the main motor 20 so that the roller pair 12 / I is moved in the processing direction A. When the draft sections VV and HV are lengthened, the roller pair 12 / I is rotated in the reverse direction in the direction B in the first stage, and this is stretched by rotation. Sometimes a slack ring is intentionally created in the fiber sliver 5 ″. Thereafter, when the main draft section HV is lengthened by moving the sliders 35a, 36a coupled to each other in the direction D and the direction F, the intentionally formed wheel is stretched again in this process, ie , Again stretched linearly. Finally, after separating the bridge 50, the slider 36a is moved in the direction F. By connecting the drive device to the inlet lower roller pair and the intermediate lower roller pair by the toothed belt 47 as described above, the length of the fiber sliver 5 'in the preliminary draft section VV remains unaffected. is there. The slight compression that can occur in the fiber sliver 5 ^IV upstream of the roller pair 14 / III has no significant meaning with respect to the draft and structure of the fiber sliver 5 ^IV .

  5a and 5b show a structure that causes movement of the sliders 36a, 35a. The nip line interval in the preliminary draft section VV is extended from “a” (FIG. 5a) to “a ″” (FIG. 5b). The sliders 36a and 35a are sequentially moved according to arrows E and C, respectively. This movement is carried out by stopping the toothed belt wheel 40 or by immobilizing the toothed belt wheel 40 by means of a speed-reducing brake or the like and then starting the drive motor 19, As a result, the toothed belt 47 moves. By continuing this, the sliders 36a and 35a are moved as shown in FIGS. 4a and 4b, and then moved as shown in FIGS. 4c and 4d.

  In FIG. 6 a, an electromagnetic deceleration brake is provided, and this electromagnetic deceleration brake has a rod-shaped iron core 53 surrounded by a plunger coil 54. For example, a brake shoe 55 made of a plastic material or the like is attached on the surface of one end face of the iron core 53. The iron core 53 is movable in the directions of arrows M and N. When current flows through the plunger coil 54, the iron core 53 is moved in the direction M as shown in FIG. 6b, so that the brake piece 55 is pressed against the smooth cylindrical surface of the shaft 44a of the toothed belt wheel 44. As a result, as long as a voltage is applied to the plunger coil 54, the toothed belt wheel 44 is fixed (stopped) so as not to rotate.

  In FIG. 7, a pneumatic cylinder 60 having a piston rod 61 is attached to the slider 36a. When pressure is received from the pneumatic cylinder 60, the piston rod 61 is moved in the direction of the arrow P and is pressed against the machine frame 61 with a large contact pressure. As long as compressed air is applied to the pneumatic cylinder 60, the slider 36a is fixed (stopped) so that it cannot be moved relative to the rod 37a.

  In FIG. 8, a flat metal piece (plate) is provided as a bridge 50 between the slider 35a and the slider 36a. The metal piece is, for example, using a bolt, and one end 50a of the metal piece. Is fixed to the slider 36a. This flat metal piece has an elongated hole 50c in a region 50b facing the slider 35a, through which the bolt 62 engages in a threaded hole (not shown) in the slider 35a. Is possible. With this bridge 50, the slider 35a and the slider 36a can be rigidly coupled to each other at various intervals.

  In FIG. 9, in contrast to FIG. 1, each of the lower rollers I, II, III is respectively driven by its own drive motor 20, 52, 19 as disclosed in DE-OS 38 01 880, for example. Driven by. The motor 20 drives the toothed belt wheel 55 of the lower roller I by the toothed belt 56, the motor 52 drives the toothed belt wheel 41 of the lower roller II by the toothed belt 57, and the motor 19 is toothed. The belt 47 drives the toothed belt wheel 40 of the lower roller III. In addition to the smooth guide pulley wheel 46, another smooth guide pulley wheel 51 is attached to the slider 36a. The endless toothed belt 47 passes continuously around the pulley wheels 44, 46, 40, 51, 43. The toothed belt wheels 44, 40, 43 are engaged with the teeth of the toothed belt 47, while the smooth guide pulley wheels 46, 51 are engaged with the smooth back surface of the toothed belt 47. The sliders 35a and 36a are rigidly coupled to each other by a bridge 50 so as to be freely released. The sliders 35a and 36a can move independently of each other when they are not coupled by the bridge 50, and can move together when they are coupled by the bridge 50.

  In FIG. 10, the drive motor 19 for the lower rollers II, III is in communication with the electronic control and adjustment device 26. Adjustment values for changing the draft sections VV, HV (i.e. the length of the drawing section) can also be entered manually by the input device 29 from the storage device 31 for individual categories of fiber material. It is also possible.

  With the fiber sliver 5 inserted, the nip line interval in the preliminary draft section VV and / or the main draft section HV can be adjusted.

  The movement can be performed even when the upper roller 11-14 is mounted. 1 and 10 show the fiber sliver 5 inserted and the upper rollers 11-14 installed. With the fiber sliver 5 inserted and the upper rollers 11-14 loaded, the mounting base of at least one of the sliders 35a, 36a or the lower rollers II, III is released, and these The slider or mount is set to the desired nip line spacing a, a 'and nip line spacing b, b' by the moving device, for example as shown in FIGS. 3a, 3b and FIGS. 5a, 5b, after which The sliders 35a, 36a or the mounting base are fixed again (for example, as shown in FIG. 7).

  The movement can be performed even when the upper rollers 11-14 are lifted and separated. The upper rollers 11-14 can be lifted and completely separated from the lower rollers I, II, III in the manner shown in DE-OS 197 04 815. Around the portal 58. However, in order to allow the fiber sliver 5 to slide through the nip of the roller without being adversely affected during the movement of the draft sections VV, HV and without being adversely affected by the roller pair, It may be sufficient to unload 11-14 and lift these upper rollers slightly from the lower rollers I-III.

  The invention has been described using as an example the adjustment of the nip line spacing of the drawing mechanism of the drawing machine. The present invention also includes within its scope adjustments to the kneading mechanism of other machines such as, for example, carding machines, carding machines, roving machines, and ring spinning machines.

DESCRIPTION OF SYMBOLS 1 Drawing machine 2 Drawing mechanism 3 Inlet 4 Outlet 5 Fiber sliver 6 Sliver guide 7, 8 Extraction roller 9 Measuring element 11, 12, 13, 14 Upper roller 19 Control motor 20 Main motor 21, 22 Control device 23, 24 Octopus Generator 26 Central computer unit I, II, III Lower roller

Claims (58)

  A stripping mechanism frame for accommodating a stripping mechanism having at least two pairs of rollers, each comprising an upper roller and a lower roller, and adjusting the spacing of at least one lower roller relative to another lower roller; Means and in each case a mounting device for accommodating the lower roller, the lower roller being driven by at least one drive element rotating endlessly around the pulley wheel, In an apparatus in a drawing machine having a drawing mechanism for fiber sliver doubling and drafting, at least one pulley wheel (40, 41, 42, 43, 44, 45, 46, 51) and the tension are applied. The drive element (47) used to adjust the mounting device (33a, 33b, 34a, 34b, 35a, 35b, 36a, 36b). The moving force applied to the pulley wheel (40, 41, 42, 43, 44, 45, 46, 51) or the driving element (47) is applied to the mounting device (33a, 33b, 34a, 34b, 35a). , 35b, 36a, 36b), which can be converted into a form of adjustment movement.   2. Device according to claim 1, characterized in that the drive element (47) is stationary and the pulley wheel (40, 41, 42, 43, 44, 45, 46, 51) is rotated. .   3. The pulley wheel (40, 41, 42, 43, 44, 45, 46, 51) is stationary and the drive element (47) is moved. Equipment.   4. The device according to claim 1, wherein the rotation of the pulley wheel or the movement of the driving element is converted into a form of adjustment movement of the slider.   At least one guide pulley wheel is mounted on each slider (mounting base), and one or more of the roller drive pulley wheels, ie the guide pulley wheels, in each case sequentially, the tensioned drive element 5. The device according to claim 1, wherein the device acts on both sides.   6. The device according to claim 1, wherein the pulley wheel or the drive element is moved manually.   The apparatus according to claim 1, wherein the slider is linearly movable.   8. A device according to claim 1, wherein the drive element is a toothed belt.   9. A device according to claim 1, wherein an endless flexible toothed belt is present.   10. The device according to claim 1, wherein the pulley wheel comprises a toothed belt wheel.   11. The apparatus according to claim 1, wherein the pulley wheel comprises a guide pulley wheel.   12. The device according to claim 1, wherein at least one drive pulley wheel is provided.   13. A device according to any one of the preceding claims, wherein there is a driven pulley wheel.   14. The device according to claim 1, wherein the driving element is wound around the pulley wheel in a loop.   15. A device as claimed in any one of the preceding claims, wherein the drive element and the pulley wheel are engaged with each other.   The apparatus according to any one of claims 1 to 15, wherein the pulley wheel for adjusting the slider is the driving pulley wheel (roller driving pulley wheel) of the lower roller.   17. A device according to any one of the preceding claims, wherein the slider is movable during adjustment.   18. Apparatus according to any one of the preceding claims, wherein the slider is adapted to be stopped.   The apparatus according to any one of claims 1 to 18, wherein the stop mechanism is freely released.   20. A device according to any one of the preceding claims, wherein there is a display device relating to the position of the slider.   21. The device according to claim 1, wherein a drive motor is used for rotation of the pulley wheel.   Device according to any one of the preceding claims, wherein the drive motor is used for the operation of the drive element.   23. The apparatus according to any one of claims 1 to 22, wherein the drive motor is used for the lower roller.   24. A device according to any one of claims 1 to 23, wherein a separate drive motor is used.   25. A device according to any one of the preceding claims, characterized in that belt shortening or belt stretching is automatically equalized during adjustment.   26. The device according to claim 1, wherein the belt equalization is effected in the slider by two guide pulley wheels.   27. The apparatus according to any one of claims 1 to 26, wherein the lower rollers are independently adjusted independently of each other.   A roller drive pulley wheel and a guide pulley wheel are attached to the slider of the inlet roller, and a roller drive pulley wheel and a guide pulley wheel are attached to the slider of the intermediate roller. Item 28. The apparatus according to any one of Items 1 to 27.   The drive element passes around the pulley wheel at the slider of the inlet roller and passes around the pulley wheel at the slider of the intermediate roller in the form of a mirror image. The device according to any one of 1 to 28.   30. A device according to any one of the preceding claims, wherein the drive element is in tension before the movement, during the movement and after the movement.   31. A device according to any one of the preceding claims, wherein the drive motor is in communication with an electronic control and adjustment device.   32. A device according to any one of the preceding claims, wherein a measuring element is connected to the control and regulation device.   33. Apparatus according to any one of claims 1 to 32, wherein the measurement element is capable of recording measurement variables associated with fibers and / or measurement variables associated with mechanical devices.   34. The apparatus according to any one of claims 1 to 33, wherein the adjustment of the slider is performed when the drawing machine is in operation.   35. The apparatus according to any one of claims 1 to 34, wherein the adjustment of the slider is performed when the drawing machine is at rest.   36. The apparatus according to any one of claims 1 to 35, wherein the adjustment of the slider is performed during a can change.   37. The apparatus according to any one of claims 1 to 36, wherein the drawing machine is self-regulating.   The apparatus according to any one of claims 1 to 37, wherein the adjustment of the slider is performed by inputting an adjustment variable.   The apparatus according to any one of claims 1 to 38, wherein the adjustment variable can be input manually.   40. A device according to any one of the preceding claims, wherein a storage device for the adjustment variable is connected to the control and adjustment device.   41. The apparatus according to claim 1, wherein the slider for the entrance roller and the slider for the intermediate roller are coupled by a rigid coupling element.   42. Apparatus according to any one of claims 1 to 41, wherein the coupling element is releasably coupled.   43. Apparatus according to any one of claims 1 to 42, wherein the spacing between the roller pairs can be adjusted without fiber material.   44. Apparatus according to any one of claims 1 to 43, wherein the spacing between the roller pairs can be adjusted with fiber material.   45. Apparatus according to any one of claims 1 to 44, wherein the length of the preliminary draft section is adjustable.   46. Apparatus according to any one of claims 1 to 45, wherein the length of the main draft section is adjustable.   47. Apparatus according to any one of claims 1 to 46, wherein the length of the preliminary draft section and the length of the main draft section are adjustable.   48. Apparatus according to any preceding claim, wherein each of the lower rollers has its own associated drive motor.   49. The apparatus according to any one of claims 1 to 48, wherein the entrance lower roller and the intermediate lower roller are driven by one drive motor.   50. A device according to any one of the preceding claims, wherein a brake, a stop device or the like is associated with the stationary pulley wheel.   51. The device according to claim 1, wherein a mechanical brake, a stop device or the like is present.   52. The device according to any one of claims 1 to 51, wherein an electric brake, a stop device or the like is present.   53. The apparatus according to any one of claims 1 to 52, wherein the drive motor is a self-braking motor.   54. The device according to any one of claims 1 to 53, wherein an electromagnetic brake, a stop device or the like is present.   55. The apparatus according to any one of claims 1 to 54, wherein the drive motor drives a further drive mechanism train having a freewheel mechanism or the like.   The device according to any one of claims 1 to 55, characterized in that the mounting device comprises the mounting base (33a, 33b, 34a, 34b) and the slider (35a, 35b, 36a, 36b). .   57. The mounting base (33a, 33b, 34a, 34b) and the slider (35a, 35b, 36a, 36b) are fixed to each other by, for example, bolts. The device described in 1.   58. Apparatus according to any one of claims 1 to 57, characterized in that the mounting base (33a, 33b, 34a, 34b) and the slider (35a, 35b, 36a, 36b) are in one piece structure. .

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