JP2004346479A - Sectional warper for patterned warp yarn - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems of a sectional warper for patterned warp yarn for feeding adjusted yarns to a warping drum, wherein the construction is very complicated. <P>SOLUTION: The sectional warper for patterned warp yarn comprises a controlling device (17) connected to angle detecting devices (30-31) detecting angular position (α) of a support (16), wherein the controlling device (17) is set to control a driving device for axial direction (15) depending to the angular position (α) of the support (16). Thus the movement control of a thread guide element (13) is simplified. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The invention relates to a warping drum, a support arranged in the front area of the warping drum and having a rotary drive, and displaceable in the axial direction of the warping drum by an axial drive arranged on this support And at least one yarn guide element.

  In order to manufacture the warp for the pattern, the warping drum is first stopped against relative rotation and the thread guide element is moved around the circumference of the warping drum, and subsequently conforms in its entirety to the required warp length for the pattern The yarn must be fed on the circumference of the warping drum with as many winding layers as will be done. Generally, transport belts that can move in the axial direction are arranged on the peripheral surface of the warping drum, and these transport belts convey and remove a winding layer group formed by the yarn from the yarn guide element. Space can be prepared for a new thread. In addition to using only one yarn guide element, it is of course possible to simultaneously move a plurality of yarn guide elements around the peripheral surface of the warping drum and supply a plurality of yarns simultaneously.

  Further, in order to prevent the yarn from slipping off from the front of the yarn layer formed on the peripheral surface of the warping drum, the front of the yarn layer is made to have a conical shape. For this reason, the yarn is shifted by a small section for each winding layer by a yarn guide element from the front face where the support is arranged, to a direction away from the front. This small section should be at least three times the thread thickness in order to achieve as shallow a cone angle as possible, and therefore the thread guide element is essentially a spiral hoop around the circumference of the warping drum. I draw a winding. However, the spiral helix need not have a continuous pitch. In other words, the spiral helical winding can also be formed by a series of circular motion trajectories, in which the yarn guide element jumps from one circular trajectory to a subsequent circular trajectory at a predetermined angular position or quickly. Moved to. When the required number of windings has been applied, the thread guide element must again return to the initial position (home position) of the conical front and start the next winding.

  An object of the present invention is to provide a partial warping machine for a handle warp, which can simplify the motion control of the yarn guide element.

  This problem is solved in a partial warp for a warp of the type pointed out at the beginning, wherein an angle detecting device for detecting an angular position of a support is connected to a control device, and the control device is connected to the angular position of the support. The problem is solved by controlling the axial drive in dependence.

  With this configuration, it is possible to control the movement of the yarn guide element regardless of the rotation speed at which the support rotates. In this case, the thread guide element can occupy an appropriate position depending on the angular position of the support. Also, when the support rotates slowly, the thread guide element is moved correspondingly slowly, and when the support rotates rapidly, the thread guide element is moved correspondingly quickly. In short, this is also preferred for all movements of the yarn guide element, ie, in the case of generating spiral helical movements and in the case of jump-back movements. As long as another movement is carried out on the thread guide element, that movement is also controlled as a function of the speed. This arrangement has the advantage that the movement of the thread guide element can be monitored by the operator by slowly rotating the support. According to the programming of the warping process or other inputs, during low-speed rotation of the support, for example in the creep mode, the movement of the thread guide element is adjusted to meet the operator's requirements, so that the operator has a corresponding movement. Can be convinced similarly when the support is rotating at high speed. In other words, the control operates as if it were a mechanical transmission, but in its function far exceeds the possibilities of a mechanical transmission. In other words, moving the thread guide element on virtually any trajectory is much easier than with a mechanical transmission. Nevertheless, the correspondence between the angular position of the support and the axial position of the thread guide element is maintained.

  The axial driving device is constituted by a stepping motor, and the control device assigns a configurable number of steps of the stepping motor to each increment of the rotation angle of the support. With this configuration, when the rotation speed increases and the increment of the angle is quickly passed, the number of steps assigned to the angle increment also occurs in a shorter time. On the other hand, if the support only rotates at low speed, a long time corresponding to the same number of steps is required. This is a relatively simple embodiment for creating a correspondence between the angular position of the support and the axial position of the thread guide element.

  In this case, the stepping motor is preferably configured as a rotary motor, the axis of which is arranged parallel or substantially parallel to the radial direction of the warping drum, and the control device is adapted to perform the stepping depending on the actual rotation position of the stepping motor. Is to assign a number. With this configuration, the yarn guide element is arranged on the lever, and swings around the axis of the rotary motor together with the lever. This axis need not, of course, be mathematically strictly parallel to the radial direction of the warping drum, but is well tolerated even if it has a constant tilt angle. Also, during this oscillating movement, a different axial movement of the thread guide element can occur at each angular step of the stepping motor, depending on the actual angular position of the lever. For example, if the lever is substantially parallel to the axial direction of the warping drum, swinging by a predetermined angle will result in a much smaller axial displacement of the thread guide element than when the lever is at 70 ° to said position. cause. The displacement of the yarn guide element in the axial direction depends on the angular position of the rotary stepping motor in a relation of a cosine function. The choice of this function or of another corresponding correction function can be determined by the control unit.

  Preferably, a plurality of yarn guide elements are provided, and the control device controls the yarn guide elements to respective positions in different axial directions. When a plurality of yarn guide elements are provided, a plurality of yarns are supplied simultaneously. In other words, it is possible to guide around the peripheral surface of the warping drum and to considerably reduce the time for manufacturing the warp for the handle. If the yarn guide elements are guided around the warping drum at different axial positions, the individual yarns are fed side by side rather than superposed. That is, the result known when guiding with a reed in a cone type partial warping machine is achieved. When the yarns are properly juxtaposed, the rewinding becomes even easier. The yarn wound endlessly around the warping drum is cut at the beginning and end of the warp length for rewinding. After the anti-rotation device of the warping drum has been released, in this case the yarn is drawn out side by side from the rotating warping drum.

  In this case, undesired crossing of the yarns can be avoided, preferably by arranging the yarn guide elements that follow one another in the rotational direction on the adjacent rotational trajectories in the axial direction.

  Preferably, a yarn thickness measuring device is provided, which measures the thickness of each yarn at least once during each rotation of the yarn guide element and transfers it to the control device, which controls the axis depending on the yarn thickness. Activate the directional drive. This has advantages, inter alia, in view of the configuration of the cone. On the one hand, it is sought to achieve a cone angle that is as shallow as possible, ie less than 20 °, or even less than 15 °. On the other hand, we do not want the cone angle to be too shallow. By the way, when the yarn thickness is detected continuously, the axial movement of the yarn guide element is controlled depending on the yarn thickness so that the yarn guide element advances at least three times the yarn thickness during each rotation. Can be. Thus, the cone angle is about 18.5 °. The formation of this cone takes place automatically in this case. That is, it is not always necessary to separately input the thread thickness when creating a warping instruction.

  Preferably, the control device has a speed calculating device, which calculates the rotational angular velocity of the support, and the control device starts the movement of the thread guide element depending on the rotational angular speed of the support at different angular positions. To generate a drive signal. The drive of the thread guide element responds to the drive signal with a certain delay time. This delay time is indeed relatively short, in the range of a few milliseconds, for example 4-6 ms. However, during this time, the thread guide element advances to different angular positions, depending on the rotational speed of the support. By the way, if the rotation speed of the support is taken into account when the drive signal is generated, the yarn guide element can always be moved at the same angular position regardless of the rotation speed of the support. That is, "early occurrence (early start)" is used, in which the support starts to move at an earlier angular position than during the low-speed rotation when the support rotates at a high speed. With the dependence of the speed of movement of the thread guide element on the speed of rotation of the support, a precisely reproducible movement of the thread guide element is achieved irrespective of the speed of rotation of the support.

  Hereinafter, the present invention will be described in detail based on preferred embodiments with reference to the drawings.

  The partial warping machine for a warp shown in FIG. 1 has a warping drum 1, and a conveying belt 2 is arranged on a peripheral surface of the warping drum 1 in parallel with an axis. It is configured to be movable. The dividing rods 4, 5, 6 arranged parallel to the axis of the warping drum 1 can also be referred to as Leeds rods or cutting rods depending on their functions. Further, another dividing rod can be arranged on the opposite side of the warping drum 1 that is not visible in FIG.

  The rotary creel 7 has a rotating body 8, which carries a number of bobbins 9 and is driven by a motor 10.

  A thread guide 11 is provided at a front end of the warping drum 1, and a thread 12 drawn from the bobbin 9 is guided around the peripheral surface of the warping drum 1 by using the thread guide 11. It is configured to be possible. For this reason, the yarn guide 11 has a yarn guide element 13, and this yarn guide element 13 can be configured as, for example, an eyelet (eyelet) through which the yarn 12 passes. These thread guide elements 13 are arranged at the tip of a lever 14 (FIGS. 2 and 3), and the lever 14 is rotatable with respect to a support 16 by a stepping motor 15. The stepping motor 15 is controlled by the control device 17 so that the position of the yarn guide element 13 can be changed in the direction indicated by the double-headed arrow 18. By the swing of the lever 14, the position of the thread guide element 13 in the axial direction changes relatively to the warping drum 1.

  A plurality of supports 16 are provided, each configured as a radial arm. These supports 16 are driven by a rotating body 8 via a shaft 19. That is, the yarn guide 11 rotates in synchronization with the rotating body 8.

  A yarn thickness measuring device 20 is arranged in the movement path of the yarn 12. The yarn thickness measuring device 20 has a measuring unit 21 by which the yarn 12 is guided on a circular orbit. At that time, the yarn 12 shadows the detector 22 depending on its thickness. That is, the yarn thickness measuring device 20 measures the thickness once each time the yarn 12 rotates in the direction indicated by the arrow 23, and notifies the control device 17 of this thickness.

  Sorting fingers 24, 25, 26 are arranged at the ends of the dividing rods 4, 5, 6, and further, facing the rotary creel 7. The sorting fingers 24 to 26 are arranged such that, with respect to the warping drum 1, respectively, the yarn 12 comes either radially outside the dividing rods 4, 5, 6 or radially inside the dividing rods 4, 5, 6. The yarn 12 is guided. Kreuz can be formed using the sorting fingers 24-26. The twill is needed at the beginning and end of the warp in order to be able to separate the yarn on the one hand (partial twill) and on the other hand to cut the yarn (cut twill). FIG. 1 shows three dividing rods 4 to 6. However, more, for example four dividing rods can be provided. That is, other dividing rods 4, 5, and 6 not shown in FIG. 1 may be arranged on the back side of the partial warper.

  As shown in FIGS. 1 and 2, the yarn guide 11 is guided around the warping drum 1 by the rotational movement of the support 16 for producing the warp for the handle. At that time, the yarn guide 11 supplies the yarn drawn from the rotary creel 7 onto the conveyor belt 2. Each yarn 12 is guided around the warping drum 1 with a number of windings that will result in the required warp length when fed over the circumference of the warping drum 1. For example, if the required warp length is 700 m and the circumference of the warping drum 1 is 7 m, each yarn 12 is guided around the warping drum 1 in 100 winding layers.

  To ensure that the individual winding layers remain in their fed order and that the individual winding positions do not shift in front of the yarn layers formed on the warping drum, each winding layer is It is offset by a small distance in the direction indicated by arrow 3 relative to the preceding winding layer. This small distance is preferably at least three times the yarn thickness. This produces a cone angle in front of the winding layer. This cone angle is less than 20 °. By continuously measuring the thread thickness with the thread thickness measuring device 20, continuous control of the configuration of the cone is possible.

  Then, as shown in FIG. 3, the stepping motor 15 is configured to swing the lever 14 in order to generate a displacement of each winding layer. If the length of the lever 14 is, for example, about 100 mm, a correspondingly long cone can be produced, which is suitable for having a maximum warp length.

  That is, the yarn guide element 13 is guided around the peripheral surface of the warping drum 1 in a spiral helical shape. The spiral helical winding can have a continuous pitch in the direction indicated by the arrow 3 or can be synthesized by a series of circular motions. A jump from the orbit to the next circular orbit is performed.

  When the required number of winding layers is wound on the warping drum 1, the next yarn can be wound again at the initial position of the cone previously formed on the peripheral surface of the warping drum 1. The arm 14 is again configured to swing back to its starting point relatively quickly.

  In order to encourage these movements, the stepping motor 15 is configured to be appropriately controlled. This control will be described below based on the schematic diagram of FIG. Identical elements are again provided with the same reference numbers.

  As shown in FIG. 4, an angle transducer 30 adjacent to the axis 19 (see FIG. 2) cooperates with an angle sensor 31 which continuously determines the angle α of the support 16. Cooperates with the detection device 32. Thus, the position of the remaining support 16 is automatically known. This is because the remaining support has a predetermined angular position with respect to the support 16 shown in FIG.

  The required movement trajectory of the yarn guide element 13 depending on the rotation of the support 16 is stored in the program storage device 33. The program stored in the program storage device 33 includes, for example, moving the yarn guide element 13 around the circumference of the warping drum 50 times, and moving the yarn guide element 13 in the direction indicated by the arrow 3 (see FIG. 1) at each rotation. It can be made to move by 1.2 mm. At the end of the 50th rotation, the yarn guide element 13 is returned again by 60 mm in the direction opposite to the arrow 3.

  By the way, the program storage device 33 transfers information on the required exercise progress to the motor control device 34. The motor controller 34 generates a predetermined number of step pulses for driving the stepping motor 15, which is an axial driving device, at a predetermined angle increment in which the support 16 advances. In other words, the lever 14 is moved depending on the movement of the support 16. Therefore, when the support 16 rotates quickly, the lever 14 also swings quickly. Also, when the support 16 rotates slowly, the lever 14 has more time to swing because the movement is dependent on the support 16. That is, the step pulse for the stepping motor 15 is generated at a lower speed, that is, at a longer time interval.

  Since the lever 14 swings around an axis extending substantially parallel to the radial direction of the warping drum 1, the same axial feed of the yarn guide element 13 is assigned to each step of the stepping motor 15. Not. Therefore, the angle position of the lever 14 is detected by the additional angle sensor 35, and this angle position is notified to the correction device 36. The correction device 36 calculates a correction value, and the motor control device 34 determines the correction value.

  Angle sensor 35 is only shown here for ease of explanation. Generally, the stepping motor 15 feeds back its angular position to the controller 17, so that this information already exists in the controller 17. This information can be determined in the correction device 36.

  The angle detection device 32 is connected to a rotation speed calculation device 37, and the rotation speed calculation device 37 calculates the rotation angular speed ω by temporally differentiating the rotation angle α. Then, the rotational angular velocity ω can be calculated by another method.

  Here, the rotation speed calculation device 37 is connected to the motor control device 34 for the following purpose. Certain movements of the lever 14 are subject to a corresponding drive of the stepper motor 15, which responds to the drive signal only with a certain delay. This delay is in the range of a few milliseconds, for example 4-6 ms.

  If it is desired to cause a certain movement of the thread guide element 13 at a particular position of the thread guide element 13 in the direction of rotation, for example the jump-back movement, the drive signal must always be generated early. The delay time is substantially constant. However, since the support 16 travels a different angular distance within this fixed time depending on the rotational angular velocity ω, the motor control device 34 considers the rotational angular velocity of the support 16 when generating the drive signal for the stepping motor 15. There must be. For example, when a certain movement of the yarn guide element 13 is performed at 300 °, when the yarn guide element is guided around the peripheral surface of the warping drum 1 at a speed of 100 m / min, the drive signal has a rotation angle of 299. When the yarn guide element 13 is generated at a position of 5 ° and is guided around the warping drum 1 at 1200 m / min, the drive signal is generated at a position of a rotation angle of 294 °.

  When a plurality of yarn guide elements 13 are provided on a corresponding number of supports 16 as shown in FIG. 2, the motor control device 34 controls the yarn guide elements 13 to move the yarn guided by the yarn guide elements 13 in the axial direction. The yarns are controlled so as to be fed side by side on the warping drum 1. Thus, the configuration of the yarn layers is substantially consistent with what would be produced with a conventional cone type partial warper.

  It should be noted here that the stepping motors 15 of the support 16 can be individually driven as needed. This is particularly advantageous when the dividing rods 4, 5, 6 are located on the front and rear sides of the warping drum 1. In that case, the yarn guide element 13 can feed the yarns 12 individually above or below the dividing rods 4, 5, 6. That is, the thread guide element 13 runs along any “meandering line” (a curved shape that alternates one or both in the axial direction with respect to the spiral or circular line) without being restricted by the angular position of the support 16. be able to. This offers significant advantages when controlling the movement of the yarn 12.

  The figure shows one embodiment of the present invention, and another embodiment may be used. For example, it is shown that the thread guide elements 13 are arranged on a bar-shaped support 16, but the individual supports 16 can also be replaced by disks or plates, in which case the thread guide elements are provided on their peripheral surfaces. 13 may be arranged. Doing so improves stability, especially when the operating speed is increased.

  The present invention can be used when a yarn is supplied to a warping drum of a partial warper.

1 is a schematic overall view of a partial warping machine for a handle warp having a rotary creel. FIG. 2 is an overall view of a yarn guide and a rotary creel of the partial warping machine shown in FIG. 1. It is the elements on larger scale which showed the thread guide of embodiment of this invention. It is an explanatory view showing movement control of a thread guide element.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Warping drum 2 Conveyor belt 8 Rotating body 11 Thread guide 12 Thread 13 Thread guide element 14 Lever 15 Stepping motor 16 Support 17 Control device 20 Measuring device 37 Speed calculating device α Angle position ω Rotation angular speed

Claims (7)

A warping drum, a support disposed in a front area of the warping drum and having a rotary drive, and at least one displaceable in the support in the support and disposed in an axial direction of the warping drum by an axial drive. In a partial warping machine for a pattern warp having a yarn guide element,
An angle detector (30-31) for detecting an angular position (α) of the support (16) is connected to a controller (17);
A partial warping machine for a handle warp, wherein the control device controls the axial driving device (15) depending on an angular position (α) of the support (16). An axial driving device is constituted by a stepping motor (15);
2. The handle for warp according to claim 1, wherein the control device assigns a settable number of steps of the stepping motor to each increment of the rotation angle of the support. Partial warping machine. The stepping motor (15) has the form of a rotary motor,
The rotation axis of the stepping motor (15) is arranged parallel or almost parallel to the radial direction of the warping drum (1),
3. The warper according to claim 2, wherein the control device (17) assigns the number of steps depending on the actual rotational position of the stepping motor (15).   A plurality of thread guide elements (13) are provided, and said control device (17) controls these thread guide elements (13) to different axial positions. The partial warping machine for a pattern warp according to the above item.   5. A warping machine according to claim 4, wherein the yarn guide elements (13) which follow one another in the rotational direction are arranged on adjacent rotational tracks in the axial direction.   A yarn thickness measuring device (20) is provided, which measures the thickness of each yarn (12) at least once during each rotation of the yarn guide element (13) and transfers it to the control device (17). 6. The warper according to claim 1, wherein the control device activates the axial drive device depending on the yarn thickness. The control device (17) has a speed calculation device (37);
The speed calculating device calculates a rotational angular speed (ω) of the support (16),
2. The control device according to claim 1, wherein the control device generates a drive signal for initiating the movement of the thread guide element depending on the rotational angular velocity of the support at different angular positions. The partial warping machine for a pattern warp according to any one of the items 6 to 6.

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