JP5201234B2 - Wrap supply control device and wrap supply control method in comber - Google Patents

Description

  The present invention relates to a lap supply control device and a lap supply control method in a comber.

  The comber has a plurality of combing heads. Each combing head grips the wrap supplied from the lap roll at the position where the nipper device is retracted, and the tip of the wrap is rolled by the combing cylinder to remove short fibers from the wrap. And fleece. The fleece is moved toward the detaching roller by the advance of the nipper device. Corresponding to the advance of the fleece, the detaching roller is reversed, the fleece previously taken (the preceding fleece) is moved backward, and the rear end of the fleece and the tip of the newly beaten fleece (following fleece) are connected. Overlapping. Thereafter, the detaching roller rotates forward to take out the fleece from the nipper device, and while joining the succeeding fleece to the preceding fleece, the rear end of the succeeding fleece is rolled by the top comb. The fleece fed out by receiving the combing action by the combing head is focused and becomes a sliver. After the sliver made by each combing head is bundled into one, it is drafted in a draft section and stored in a can by a coiler device.

  The weight of the supply wrap of the same length changes due to the change in the diameter of the wrap roll until the wrap roll reaches a state where the consumed wrap length is 100% from a full ball (wrap roll with zero consumption wrap length). Therefore, when the comb is operated at a constant lap supply speed, the change in the spinning sliver weight becomes large.

  Conventionally, as a method of equalizing the spinning sliver weight, the lap weight change due to the diameter of the wrap roll is corrected by increasing the wrap supply speed in the process from the full ball to the consumption wrap length of 100%. Thus, a method of making the spinning sliver weight uniform has been proposed (see Patent Document 1). As a method for controlling the lap supply speed, a device for measuring the lap supply weight or spinning sliver weight is provided for the shift control amount of the driving speed of the pair of lap rollers (lap arbor) on which the lap roll is placed, and the measured value A method (feedback control) for determining according to the deviation is proposed. There is also a description that a method (open loop control) in which the supply speed is increased linearly and continuously from the start of the lap supply without measuring the lap supply weight or the spinning sliver weight is also described.

JP-T 6-502894

  In order to determine the shift control amount according to the deviation of the measured value of the lap supply weight or the spinning sliver weight, a device for measuring the lap supply weight or the spinning sliver weight is required. However, an apparatus for measuring the wrap supply weight or the spinning sliver weight is large and expensive. Further, the method of measuring the spinning sliver weight is inaccurate because the spinning sliver weight measurement point is separated from the wrap supply unit and the amount of cotton falling needs to be taken into consideration.

  Patent Document 1 also proposes a method of increasing the supply speed linearly and continuously from the start of lap supply by open loop control. However, since the change in the weight of the spinning sliver does not simply decrease as the wrap roll diameter decreases, this method lacks control precision.

  The object of the present invention is to effectively correct the change in the weight of the spinning sliver due to the diameter of the wrap roll even if the comb is not equipped with a lap weight measuring device or a spinning sliver weight measuring device. An object of the present invention is to provide a lap supply control device and a lap supply control method in a comb that can achieve uniformization or suppression of weight change.

  As a result of examining the relationship between the change in the wrap roll diameter and the change in the spinning sliver weight, the invention of the present application proved that the change in the spinning sliver weight due to the change in the wrap roll diameter was generally reproducible. The change in the weight of the spinning sliver due to the diameter of the wrap roll was based on the fact that it was obtained by manually measuring the rising sliver weight. The “rising sliver weight” means the weight of the spinning sliver manufactured by all the wraps supplied from the wrap rolls of a plurality of combing heads of the comber.

  The invention according to claim 1 is a lap supply control device in a comb having a plurality of combing heads, and the lap supply device of each combing head is driven by a motor that can be driven independently of the combing drive unit. is there. Then, the spinning sliver weight is made uniform or the spinning speed is determined based on the measurement result of the fluctuation amount of the spinning sliver weight with respect to the decrease in the lap roll diameter when the comber is operated without shifting the motor by test spinning. A calculation unit that calculates a shift pattern of the motor for suppressing fluctuation of the sliver weight; and a control unit that controls the motor of the lap supply device based on the shift pattern calculated by the calculation unit. . Here, the “shift pattern” is not limited to directly representing a change in the speed of the motor, but also includes a change representing a change in the gear ratio.

  When the lap supply control device of the present invention is used, first, the comb operation is performed without changing the speed of the motor of the lap supply device by test spinning, and the fluctuation amount of the spinning sliver weight with respect to the decrease of the lap roll diameter is measured. Is performed by the operator. Based on the measurement result, the shift pattern of the motor for equalizing the spinning sliver weight or suppressing the fluctuation of the spinning sliver weight is calculated by the calculation unit in consideration of the change of the lap roll diameter. The motor of the lap supply device is controlled based on the calculated shift pattern. Therefore, even if the comber is not equipped with a lap weight measuring device or a spinning weight measuring device, it effectively corrects the change in the weight of the spinning sliver due to the diameter of the wrap roll and makes the weight of the spinning sliver uniform or changes in weight. Can be suppressed.

  According to a second aspect of the present invention, in the first aspect of the invention, when the calculation unit calculates the speed change pattern, the speed change ratio is set to a speed change ratio = K / spindle diameter when the lap roll diameter is a reference. The ratio is calculated as the ratio of the spinning sliver weight at the lap roll diameter at the time of shifting to the outgoing sliver weight (where K is a proportional constant). Here, “speed ratio” means speed / reference speed at the time of shifting. Therefore, in this invention, the speed is not changed unless the spinning sliver weight changes, and if the spinning sliver weight becomes smaller than the spinning sliver weight at the reference wrap roll diameter, the rotation of the motor Increases speed. Further, if the spinning sliver weight becomes larger than the spinning sliver weight at the reference wrap roll diameter, the rotation speed of the motor becomes small. As a result, the change in the spinning sliver weight is appropriately reflected in the lap supply speed.

  According to a third aspect of the present invention, in the second aspect of the present invention, the proportionality constant K is set to a value predetermined by the raw material. Therefore, in the present invention, the weight of the spinning sliver is made uniform or the change in weight is more effectively suppressed as compared with the case where the proportionality constant K is set to a constant value, for example, 1 regardless of the difference in the raw material of the wrap. be able to.

  According to a fourth aspect of the present invention, in the invention according to any one of the first to third aspects, the calculation unit includes a filter unit, and the filter unit is less than a filter unit spinning sliver length. A process of ignoring the fluctuation of the spinning sliver weight in the range is performed. The change in the weight of the spinning sliver includes a change not caused by a change in the lap roll diameter. In the present invention, when the calculation unit calculates a shift pattern from the measurement result, the change not caused by the change in the lap roll diameter is filtered. Therefore, the weight of the spinning sliver can be made uniform or the change in weight can be suppressed more effectively than in the case where the filter portion is not provided.

  The invention according to claim 5 is the invention according to any one of claims 2 to 4, wherein the speed change pattern is divided into a plurality of blocks, and the speed change ratio for each boundary point of the blocks. Is set, and the gear ratio between adjacent boundary points is set based on the value of the gear ratio at both boundary points. For example, the transmission ratio between adjacent boundary points is calculated by the slope of a straight line connecting both boundary points. Therefore, even if the number of shift point data input required for calculating the shift pattern is small, the shift control of the motor from the start to the end of the lap supply is properly performed.

  The invention described in claim 6 is a lap supply control method in a comb having a plurality of combing heads, and the lap supply device of each combing head is driven by a motor that can be driven independently of the combing drive unit. Then, a spinning sliver weight measuring step in which the comber is operated without a shift of the motor by test spinning, and a spinning sliver weight is measured for each predetermined spinning sliver length, and the spinning sliver weight measuring step From the measurement result of the spinning sliver weight measured in Step 1, a shift pattern of the motor for suppressing the fluctuation of the spinning sliver weight is made uniform or the spinning sliver weight is uniformed in consideration of a change in a wrap roll diameter. A shift pattern calculation step calculated by the calculation unit, and a motor control step in which the control unit controls the motor of the lap supply device based on the shift pattern calculated in the shift pattern calculation step. Here, the calculation unit and the control unit do not necessarily have to be configured as one device, and for example, a configuration in which a shift pattern is calculated by a calculation unit configured as another device may be employed.

  In the lap supply control method for a comber according to the present invention, the comber is operated without changing the motor speed by test spinning, and from the measurement result of the spinning sliver weight measured for each predetermined spinning sliver length, the wrap roll diameter is calculated. In consideration of the change, the calculation unit calculates a gear shift pattern for equalizing the spinning sliver weight or suppressing fluctuations in the spinning sliver weight. The motor of the lap supply device is controlled by the control unit based on the shift pattern calculated by the calculation unit. Therefore, even if the comber is not equipped with a lap weight measuring device or a spinning weight measuring device, it effectively corrects the change in the weight of the spinning sliver due to the diameter of the wrap roll and makes the weight of the spinning sliver uniform or changes in weight. Can be suppressed.

  According to the present invention, even if the comb is not equipped with a lap weight measuring device or a spinning weight measuring device, the weight change of the spinning sliver due to the wrap roll diameter is effectively corrected, and the weight of the spinning sliver is uniform. Or suppression of weight change can be achieved.

The schematic side view of a combing head. The graph which shows the relationship between spinning sliver weight and consumption wrap length. The graph which shows the relationship between a transmission coefficient and consumption lap length.

Hereinafter, an embodiment embodying the present invention will be described with reference to FIGS.
The comber includes a working unit provided with a plurality (eight in this embodiment) of combing heads. As shown in FIG. 1, each combing head 11 includes a pair of lap rollers 12, a nipper device 14 having a feed roller 13, a combing cylinder 15, and two pairs of front and rear detaching rollers 16 and 17. Yes. In FIG. 1, only one combing head 11 is shown, and the other combing heads 11 are not shown.

  The nipper device 14 has a nipper frame 18 that is arranged to be able to swing forward and backward above the combing cylinder 15, and the nipper frame 18 is provided with a bottom nipper 19 at the bottom thereof. A nipper arm 20 is rotatably provided on the nipper frame 18 via a support shaft 18 a, and a top nipper 20 a is fixed to the tip of the nipper arm 20. The top nipper 20a opens and closes at a predetermined timing in synchronization with the forward / backward swing motion of the nipper frame 18, and cooperates with the bottom nipper 19 to hold the lap roll L. A top comb 21 is attached to the nipper frame 18 so as to perform a predetermined motion in synchronization with the nipper frame 18 in front of the bottom nipper 19.

  A nipper shaft 22 is disposed behind the combing cylinder 15 and below the nipper frame 18 so as to be reciprocally rotatable. A first end portion of a nipper frame driving arm 23 is fixed to the nipper shaft 22 so as to be integrally rotatable, and a rear end portion of the nipper frame 18 is rotatably supported by a second end portion via a support shaft 23a. ing. The nipper frame 18 is configured to swing back and forth so that the tip of the bottom nipper 19 approaches and separates from the detaching rollers 16 and 17 by reciprocating rotation (swinging motion) of the nipper shaft 22. . In the combing cylinder 15, the nipper shaft 22, and the detaching rollers 16, 17, the rotation of the drive shaft common to all the combing heads 11 (not shown) driven by the main motor 24 is driven by a power transmission system (drive) such as a gear device or a crank. The nipper device 14 is driven in synchronization with the combing cylinder 15. The main motor 24 and the power transmission system 25 constitute a combing drive unit.

  On the other hand, the lap roller shaft 12a of the lap roller 12 is a lap roller drive shaft (not shown) common to all the combing heads 11 driven by the lap roller motor 26 as a motor that can be driven independently of the combing drive unit. It can be driven independently of the main motor 24 via the belt transmission mechanism 27. The main motor 24 and the lap roller motor 26 are driven via inverter devices 29 and 30 that are controlled based on a command from the control device 28. The lap roller 12, the lap roller shaft 12a, the lap roller motor 26 and the belt transmission mechanism 27 constitute a lap supply device in the comb.

  The control device 28 includes a CPU 31, a memory 32, and an input / display device 33. The input / display device 33 has a touch panel capable of setting data input by pressing a predetermined input area displayed on the display screen, and has a function of the input device and a function of the display device. The CPU 31 operates based on program data stored in the memory 32. The input / display device 33 is used to input spinning conditions such as fiber type (fiber length), spinning sliver weight, nip number, and other data necessary as combing operation conditions.

  Next, a configuration for the control device 28 to function as a lap supply control device in a comber will be described. The input / display device 33 is also used for inputting the measurement result of the spinning sliver weight (raised sliver weight). The memory 32 also functions as a spinning sliver weight measurement result input unit and a storage unit that stores a shift pattern of the lap roller motor 26 calculated by the CPU 31. The CPU 31 calculates a lap based on the shift pattern calculated from the measurement result input to the spinning sliver weight measurement result input unit and the shift pattern of the lap roller motor 26 and stored in the storage unit. It functions as a control unit that controls the roller motor 26.

  The CPU 31 calculates a shift pattern of the lap roller motor 26 from the measurement result of the spinning sliver weight input to the memory 32 and stores the shift pattern in the memory 32. When calculating the shift pattern, the CPU 31 calculates the gear ratio as the gear ratio = 1 / weight ratio. Here, “speed ratio” means speed / reference speed at the time of shifting, and “weight ratio” means (spinner sliver weight at the lap roll diameter at the time of shifting) / (reference lap roll). This means the spinning sliver weight at the time of diameter.

  In the program for the CPU 31 to calculate the shift pattern, when calculating the shift pattern from the measurement result input to the memory 32, a filter operation is performed to calculate by ignoring the change not caused by the lap roll diameter change. ing. That is, the calculation unit includes a filter unit of the input measurement result, and the filter unit varies in the spinning sliver weight within a range of less than the filter unit spinning sliver length (in this embodiment, 9.144 m (10 yards)). The process of ignoring is performed. The filter unit spinning sliver length can be set as appropriate.

Next, the operation of the apparatus configured as described above will be described.
In a state in which the comber is manufactured at the factory, the memory 32 does not store a shift pattern for equalizing the spinning sliver weight or suppressing fluctuations in the spinning sliver weight in consideration of changes in the lap roll diameter. The lap roller motor 26 is driven at a constant speed corresponding to the rotational speed of the combing cylinder 15. Therefore, in order to cause the CPU 31 to calculate a shift pattern for equalizing the spinning sliver weight or suppressing fluctuations in the spinning sliver weight in consideration of changes in the lap roll diameter, first, the lap roller motor 26 is subjected to test spinning. The comber is operated without shifting, and the operator measures the spinning and spinning sliver weight. This step is a spinning sliver weight measurement step. The measurement result is input using the input / display device 33 and stored in the memory 32. This process is the spinning sliver weight measurement result input process.

  Displaying the measurement result in correspondence with the lap roll diameter is difficult because it is difficult to accurately detect a change in the lap roll diameter, so the lap roll diameter is substituted for the consumed wrap length. FIG. 2 shows the relationship between the spinning sliver weight and the consumed wrap length. The vertical axis of the graph in FIG. 2 represents the spinning sliver weight, and the horizontal axis represents the consumption wrap length. A state where the consumption wrap length is zero is a full wrap roll state, and the wrap roll diameter decreases as the consumption wrap length increases. The vertical axis represents the spinning sliver weight when the consumption wrap length is zero without directly displaying the spinning sliver weight. It can be seen from FIG. 2 that the weight of the spinning sliver is not simply proportional to the diameter of the wrap roll but varies in a complicated manner.

  The CPU 31 calculates a shift pattern from the relationship between the spinning sliver weight and the consumption wrap length stored in the memory 32. This step is a shift pattern calculation step. The CPU 31 applies a filter to the spinning sliver weight-consumption wrap length curve shown in FIG. When filtering, if the filter unit spinning sliver length is set to 10 yards or more, the accuracy is deteriorated, and if it is too short, the number of data is increased and time is required.

The CPU 31 calculates a shift coefficient (in% display) when the consumption lap length is x by the following equation.
Speed change coefficient (%)
= 100 × {1 / (spinning sliver weight when consumption wrap length x / spinning sliver weight when consumption wrap length is zero)} = 100 × speed ratio In other words, in this embodiment, the CPU 31 changes the shift pattern. When calculating, the reference lap supply speed when calculating the gear ratio is set as the lap supply speed when the consumption wrap length is 0%.

  The change in the speed change coefficient from the full ball (consumed lap length 0%) to the lap roll replacement (consumed lap length 100%) is, for example, a graph shown in FIG. In the graph of FIG. 3, the vertical axis represents a shift coefficient (% display) with the lap supply speed when the consumed lap length is 0% as a reference speed, and the horizontal axis represents the consumed lap length (% display). Therefore, the curve in FIG. 3 represents a shift pattern corresponding to the consumed lap length.

  The shift pattern is divided into a plurality of blocks (8 blocks in this embodiment) having the consumption lap length input in advance by the input / display device 33 as boundary points, and a shift coefficient is set for each block boundary point. The Boundary point spacing (block length) is not uniform, boundary point spacing is small in the range where the change in spinning sliver weight relative to the consumed wrap length is large, and in the range where the change in spinning sliver weight relative to the consumed wrap length is small The distance between the boundary points is large. The position of the boundary point, that is, the consumption wrap length (%) of the boundary point is set by the operator inputting it with the input / display device 33.

  The CPU 31 calculates a shift coefficient corresponding to the consumption lap length at the boundary point, and stores the relationship between the consumption lap length at each boundary point and the corresponding transmission coefficient in the memory 32 in the state of Table 1, for example. This step is a shift pattern storing step.

ＣＰＵ３１は、表１の変速パターンにおいて、隣り合う境界点間の変速係数の値は両境界点の変速係数の値に基づいて演算する。この実施形態では隣り合う境界点間の変速係数の値は両境界点を結ぶ直線の勾配により演算される。

The CPU 31 calculates the value of the transmission coefficient between adjacent boundary points based on the value of the transmission coefficient at both boundary points in the transmission pattern of Table 1. In this embodiment, the value of the transmission coefficient between adjacent boundary points is calculated by the slope of a straight line connecting both boundary points.

  In FIG. 3, the shift pattern is expressed as a relationship with the shift coefficient corresponding to each consumption lap length up to 100% of the consumption lap length, where the shift coefficient when the consumption lap length is 0% is 100%. The transmission coefficient is the same as the transmission ratio expressed in%. That is, the shift pattern is divided into a plurality of blocks, and a gear ratio is set for each block boundary point, and a gear ratio between adjacent boundary points is set based on the value of the gear ratio at both boundary points. The

  Next, control of the lap roller motor 26 of the lap supply device by the control device 28 will be described. The replacement of the comb lap roll L is performed simultaneously in all the combing heads 11. The exchange between the empty (small) lap roll L and the full lap roll L is detected by the control device 28 by a manual operation or an automatic detection device. When detecting the replacement of the lap roll L, the control device 28 resets the consumed wrap length (%) to zero and enters an initial state.

  Thereafter, in the combing operation, the control device 28 controls the speed of the lap roller motor 26 via the inverter device 30 in accordance with the speed change pattern stored in the memory 32. This process is a motor control process. The CPU 31 obtains the consumed wrap length by time-integrating the motor rotation speed corresponding to the instruction frequency for the lap roller motor 26. The reference speed of the lap roller motor 26 is set in advance, and this is a speed with a speed change coefficient of 100%.

  The speed of the lap roller motor 26 is changed by setting a speed obtained by multiplying the reference speed by the speed change coefficient% in the consumed lap length x% corresponding to the time point of the speed change. The shift points input by the input / display device 33 are only the start point and end point of the shift pattern, and the boundary points of each block. However, the CPU 31 automatically calculates the speed change coefficient between adjacent boundary points with a straight fixed gradient connecting the two boundary points, and uses the speed change coefficient to speed the lap roller motor 26 at each consumed lap length x%. And the inverter 30 is instructed with a frequency corresponding to the speed to control the lap roller motor 26.

  If the spinning condition of the comber is changed from the spinning condition in which the shift pattern is stored in the memory 32, the comber is operated without changing the speed of the lap roller motor 26 by test spinning under the spinning condition. . In the same manner as described above, a shift pattern corresponding to the spinning condition is calculated by the CPU 31 and stored in the memory 32, and the lap roller motor 26 is controlled based on the shift pattern corresponding to the spinning condition.

According to this embodiment, the following effects can be obtained.
(1) A lap supply control device in a comb having a plurality of combing heads 11 and the lap supply device of each combing head 11 being driven by a lap roller motor 26 that can be driven independently of the combing drive unit is a test. A calculation unit (CPU 31) that calculates a shift pattern of the lap roller motor 26 from the measurement result of the spinning sliver weight at the time of spinning, and a control unit that controls the lap roller motor 26 based on the shift pattern calculated by the calculation unit (CPU 31). Therefore, even if the comber is not equipped with a lap weight measuring device or a spinning weight measuring device, it effectively corrects the change in the weight of the spinning sliver due to the diameter of the wrap roll and makes the weight of the spinning sliver uniform or changes in weight. Can be suppressed. In addition, because no measurement means that require adjustment or calibration (calibration) is used, in the case of a factory that has multiple units of combers, there is no difference between the individual units in the control results, and the same operating conditions. Variation in quality of spinning sliver is reduced.

  (2) When calculating the shift pattern of the lap supply speed, the calculation unit (CPU 31) sets the transmission ratio to the transmission ratio = K / weight ratio (when the speed is changed with respect to the spinning sliver weight at the reference lap roll diameter). The ratio of the spinning sliver weight at the lap roll diameter) (where K is a proportional constant) is calculated, and the proportional constant K is set to 1. Therefore, the change in the spinning sliver weight is appropriately reflected in the lap supply speed.

  (3) The calculation unit (CPU 31) includes a filter unit, and the filter unit performs processing for ignoring fluctuations in the spinning sliver weight in a range less than the filter unit spinning sliver length. Therefore, when the shift pattern is calculated from the measurement result input by the calculation unit, the change not caused by the lap roll diameter change is ignored by the filter unit, so that the spinning sliver weight is smaller than when the filter unit is not provided. Uniformity or suppression of weight change can be more effectively performed.

  (4) The shift pattern is divided into a plurality of blocks, and a gear ratio is set for each block boundary point, and a gear ratio between adjacent boundary points is set based on the gear ratio value at both boundary points. Is done. And the gear ratio between adjacent boundary points is calculated by the gradient of the straight line connecting both boundary points by the calculation unit (CPU 31). Therefore, even if the number of shift point data input required for calculating the shift pattern is small, the shift control of the lap roller motor 26 from the start to the end of the lap supply is properly performed.

  (5) The shift pattern is expressed as a change in the value of the transmission coefficient (% display) with respect to the consumption lap length (% display), and the transmission coefficient (% display) is 100 × {1 / (spinning when the consumption lap length x). Outgoing sliver weight / spinning sliver weight when consumption wrap length is zero)}. Therefore, when the shift pattern is illustrated, it is easy to understand the change state of the lap supply speed with respect to the consumed lap length.

  (6) When shifting control of the lap roller motor 26 based on the shift pattern stored in the memory 32, the CPU 31 time-integrates the consumed lap length and the motor rotation speed corresponding to the instruction frequency for the lap roller motor 26. Ask for it. Therefore, the consumed wrap length can be obtained without providing a sensor for measuring the consumed wrap length.

  (7) In the lap supply control method in the comber, the comber is operated without changing the speed of the lap roller motor 26 by test spinning, and from the measurement result of the spinning sliver weight measured for each predetermined spinning sliver length, In consideration of changes in the lap roll diameter, a shifting pattern of the lap roller motor 26 for equalizing the spinning sliver weight or suppressing fluctuations in the spinning sliver weight is calculated by the calculation unit (CPU 31) and calculated by the calculation unit. The lap roller motor 26 is controlled by the controller (CPU 31) based on the shift pattern. Therefore, even if the comber is not equipped with a lap weight measuring device or a spinning weight measuring device, it effectively corrects the change in the weight of the spinning sliver due to the diameter of the wrap roll and makes the weight of the spinning sliver uniform or changes in weight. Can be suppressed.

The embodiment is not limited to the above, and may be embodied as follows, for example.
○ Instead of calculating the shift pattern with the transmission ratio = 1 / weight ratio, the transmission ratio may be calculated with the ratio K / weight ratio. However, K is a proportionality constant, and a value obtained by a test in advance by the raw material (lapping) is stored in the memory 32. In this case, compared with the case where the proportionality constant K is set to a constant value, for example, 1 regardless of the difference in the raw material of the wrap, the weight of the spinning sliver can be made more uniform or the change in weight can be more effectively suppressed. it can.

  ○ The lap supply speed (lap roller speed) at a point other than the consumption lap length of zero may be set as the reference speed. In this case, the speed of the lap roller motor 26 may be shifted in the deceleration direction with respect to the reference speed, unlike the case where the lap supply speed at the time of zero consumption lap length is set as the reference speed.

  A measuring unit that measures the consumed lap length may be provided, and the lap roller motor 26 may be controlled to shift according to the consumed lap length based on the measurement result of the measuring unit. For example, the lap roller shaft 12a is provided with a pulse generator, and the generated pulse is input to the control device 28, whereby the number of rotations of the lap roller 12 is measured and the consumed lap length is directly measured. You may make it follow correctly. Further, the lap roller speed may be feedback controlled. In these cases, more accurate control can be realized.

The shift pattern is not limited to a configuration in which the shift coefficient is changed with respect to the consumed lap length, but may be a configuration that directly indicates a change in speed of the lap roller motor 26 with respect to the consumed lap length.
The shift pattern is not limited to a configuration in which a shift coefficient or a speed change is represented by a relationship with a consumed lap length as a substitute for a lap roll diameter, but may be a configuration represented by a relationship with a lap roll diameter. In this case, a sensor for detecting the wrap roll diameter is required.

  ○ The combing cylinder shaft 15a is provided with a pulse generator, and the generated pulses are input to the control device 28, whereby the speed of the combing cylinder shaft 15a is measured and the lap supply speed is controlled in synchronization therewith. Good. Also in this case, more accurate control can be realized.

  The comb control device 28 does not necessarily have a configuration necessary for calculating a shift pattern for performing the shift control of the lap roller motor 26, and includes a storage unit storing the shift pattern, It suffices to include a control unit that controls the lap roller motor 26 based on the shift pattern stored in the unit. For example, a comb roller is operated without changing the speed of the lap roller motor 26 by test spinning, and the lap roller considering the change in the lap roll diameter from the measurement result of the spinning sliver weight measured for each predetermined spinning sliver length. The shift pattern of the motor 26 may be calculated by a device separate from the comber. In this case, the calculated shift pattern is stored in the storage unit of the control device 28 provided in the comb via a removable medium such as a USB memory or a magneto-optical disk. That is, a device for executing the spinning sliver weight measurement result input step and the shift pattern calculation step may be provided separately from the comb. For example, the shift pattern may be calculated by a personal computer based on the spinning sliver weight measurement result.

○ The number of blocks of the shift pattern is not limited to 8 blocks, but may be less or more than 8 blocks.
○ The interval between the boundary points of the shift pattern block may be equal, but in the case of an equal interval, in order to better reflect the change in the part where the spinning sliver weight is large, increase the number of boundary points. There is a need to.

Instead of storing the shift pattern in the memory 32, the shift coefficient may be sequentially calculated from the measurement result during operation and output to the lap supply control unit.
The following technical idea (invention) can be understood from the embodiment.

  (1) In the inventions according to claims 1 to 6, the shift pattern is represented as a change in value of a gear ratio or a shift coefficient (% display) with respect to a consumption lap length (% display).

  DESCRIPTION OF SYMBOLS 11 ... Combing head, 26 ... Motor for lap rollers as a motor, 31 ... CPU as a calculating part and a control part.

Claims (6)

A lap supply control device in a comb having a plurality of combing heads, wherein the lap supply device of each combing head is driven by a motor that can be driven independently of the combing drive unit,
From the measurement result of the fluctuation amount of the spinning sliver with respect to the decrease in the lap roll diameter when the comber is operated without shifting the motor by the test spinning, the spinning sliver weight is made uniform or the spinning sliver weight is obtained. A calculation unit for calculating a shift pattern of the motor for suppressing fluctuations of the motor;
A lap supply control device in a comb, comprising: a control unit that controls the motor of the lap supply device based on the shift pattern calculated by the calculation unit.   When calculating the shift pattern, the calculation unit sets the transmission ratio to the spinning sliver weight at the time of the lap roll diameter at the time of the shift relative to the spinning sliver weight at the speed ratio = K / reference lap roll diameter. The lap supply control device for a comber according to claim 1, wherein the lap supply control device calculates as a ratio (where K is a proportional constant).   The lap supply control device for a comber according to claim 2, wherein the proportionality constant K is set to a predetermined value depending on a raw material.   The said calculating part is provided with the filter part of the said measurement result, The said filter part performs the process which disregards the fluctuation | variation of the said spinning sliver weight in the range below filter unit spinning sliver length. The wrap supply control apparatus in the comb according to any one of the preceding claims.   The transmission pattern is divided into a plurality of blocks, the transmission ratio is set for each boundary point of the block, and the transmission ratio between adjacent boundary points is based on the value of the transmission ratio at both boundary points. The lap supply control device for a comber according to any one of claims 2 to 4, which is set as described above. A lap supply control method in a comb having a plurality of combing heads and a lap supply device of each combing head driven by a motor that can be driven independently of the combing drive unit,
A spinning sliver weight measuring step in which the comber is operated without shifting the motor by test spinning, and the spinning sliver weight is measured for each predetermined spinning sliver length;
From the measurement result of the spinning sliver weight measured in the spinning sliver weight measurement step, in order to suppress the variation of the spinning sliver weight in consideration of the change in the wrap roll diameter, A shift pattern calculation step of calculating a shift pattern of the motor by a calculation unit;
A lap supply control method in a comb, wherein a control unit includes a motor control step of controlling the motor of the lap supply device based on the shift pattern calculated in the shift pattern calculation step.

Images