JP5924860B2 - Control method and control device for drafting device in pre-spinning process - Google Patents

Description

  The present invention relates to a control method and a control device for a drafting apparatus in a pre-spinning process, and more specifically, a process of drafting a plurality of slivers, such as a drawing machine or a comb, and then bundling them into one sliver, or a card The present invention relates to a control method and a control device for a drafting device in a pre-spinning process including a step of sliver a wide fiber bundle (web) drafted by a drafting device.

  In the pre-spinning process such as a drawing machine and a comber, a plurality of slivers are drafted at the same time by a drafting device, sent out as a belt-like fleece from a front roller, then converged by a gatherer and bundled into a single sliver. It is housed in Kens with a coiler device. If the belt-like fleece fed into the gatherer is not gathered by the gatherer so that both ends in the width direction are wrapped inside, the sliver contained in the cans becomes fluffy and the sliver quality is lowered. In addition, the fleece of the belt-like fleece fed into the gatherer at high speed may interfere with each other to cause fiber fluffing. A gatherer for the purpose of solving such a problem has been proposed (see, for example, Patent Document 1).

  In preparation for the operation of the comber, it is necessary to first perform a squeeze operation in which a belt-like fleece fed from the front roller of the draft device is passed through the gatherer. At this time, the fleece is clogged with the gatherer and the fleece is easily cut. For this reason, it is common to repeat the mouth-out operation several times.

JP 2010-150713 A

  When the number of times of repeating the extraction work at the time of operation preparation at the comber is large, it takes time until the operation is started, and the productivity of the machine base decreases. In addition to combs, a plurality of slivers supplied from a plurality of cans are simultaneously drafted by a draft device, sent out as a band-like fleece from a front roller, and then converged by a gatherer to be integrated into a single sliver. There are similar problems with the binding machines. Although the improvement of the gatherer of the prior art contributes to preventing the deterioration of the sliver quality, no consideration has been given to reducing the number of repetitions of the mouthing work by suppressing the fleece breakage during the mouthing work.

  The present invention has been made in view of the above-described problems, and the object of the present invention is to provide a drafting device for a pre-spinning process in which a band-like fiber bundle fed from a drafting device can be easily passed through a gatherer at the time of opening work. A control method and a control apparatus are provided.

In order to achieve the above object, the invention described in claim 1 is a control method of a drafting device in a pre-spinning process including a drafting device in which a front bottom roller and a back bottom roller are independently driven by a motor. Then, the draft device is controlled so that the draft ratio becomes larger than the draft ratio in the steady operation during the squeezing operation in which the wide fiber bundle fed from the draft device is inserted into the gatherer and converged on the sliver . Here, the “leading operation” means an operation of inserting a wide fiber bundle (for example, a fleece or a web) fed from the front roller of the draft device into the gatherer. Hereinafter, the same meaning is used.

  In this invention, since the draft device is controlled so that the draft ratio is larger than the draft ratio during steady operation, that is, the draft magnification is increased, the wide fiber fed from the front roller of the draft device. The bundle thickness is reduced and the amount of fibers per unit length is reduced. And the resistance at the time of a fiber bundle passing a gatherer becomes small, and it becomes easy to pass a gatherer, and the success rate of an extraction work becomes high.

  According to a second aspect of the present invention, the draft device is controlled so that the rotational speed of the front bottom roller is higher than that during steady operation, and the back bottom roller is at a speed during steady operation.

According to the present invention, the control of the entire comb is simplified as compared with the case where the brake bottom ratio is increased by reducing the speed of the back bottom roller instead of increasing the speed of the front bottom roller.
The invention according to claim 3 is a control device for a drafting device in a pre-spinning process, which is provided with a draft device in which the front bottom roller and the back bottom roller are independently driven by a motor, and is sent from the draft device. And a draft ratio changing means for controlling the motor so that the draft ratio becomes larger than the draft ratio in the steady operation during the lead-out operation of inserting a wide fiber bundle into the gatherer and converging to the sliver .

  In the present invention, the draft ratio changing means controls the motor that drives the front bottom roller and the motor that drives the back roller so that the draft ratio is larger than the draft ratio during steady operation during the lead-out operation. Therefore, the control method according to the first aspect of the present invention is carried out, and the thickness of the wide fiber bundle sent out from the front roller of the draft device is reduced, and the amount of fibers per unit length is reduced. And the resistance at the time of a fiber bundle passing a gatherer becomes small, and it becomes easy to pass a gatherer, and the success rate of an extraction work becomes high.

  According to a fourth aspect of the present invention, in the third aspect of the present invention, the draft ratio changing means controls the motor so that the draft ratio is in the large state while the outlet switch is in an on state. In the present invention, the draft ratio is larger than the draft ratio during steady operation while the operator is turning on the mouth switch during the mouth work. Therefore, the operator can perform the mouthing work more appropriately by performing the inching operation of the mouthpiece switch while observing the state where the fiber bundle passes through the gatherer.

  According to a fifth aspect of the present invention, in the third or fourth aspect of the invention, the draft ratio changing means gradually shifts the draft ratio increased at the time of the opening operation to the draft ratio at the time of steady operation. . If the draft ratio increased during the delivery operation is suddenly changed to the draft ratio during steady operation, clogging to the gatherer may be likely to occur depending on the spinning conditions. However, in the present invention, occurrence of such a problem is suppressed.

  ADVANTAGE OF THE INVENTION According to this invention, the strip | belt-shaped fiber bundle sent out from a draft apparatus at the time of a lead-out operation | work can make it easy to pass a gatherer.

The draft | combination apparatus of the comb which shows one Embodiment, and the schematic side view of the downstream. The schematic diagram which shows the structure of the drive part of a bottom roller. The schematic side view which shows the draft apparatus and coiler apparatus of a drawing machine which show another embodiment. The schematic diagram which shows the structure of the drive part of the bottom roller in another embodiment.

Hereinafter, an embodiment in which the present invention is embodied in a comb as a pre-spinning process will be described with reference to FIGS. 1 and 2.
As shown in FIG. 1, the draft device 11 is provided on the downstream side of a focusing table 12 that guides a plurality of slivers that are focused after being fed from a plurality of combing heads (not shown). The draft device 11 has a three-wire configuration including a front bottom roller 13, a middle bottom roller 14, and a back bottom roller 15. Each of the bottom rollers 13, 14, and 15 is supported by a roller stand (not shown). A front top roller 16, a middle top roller 17, and a back top roller 18 are disposed at positions corresponding to the front bottom roller 13, the middle bottom roller 14, and the back bottom roller 15. The bottom rollers 13 to 15 and the top rollers 16 to 18 are arranged such that the sliver S moves upward from the upstream side toward the downstream side.

  A guide roller 19 that changes the traveling direction of the sliver S obliquely downward is disposed on the upper front side of the front bottom roller 13. In front of the front bottom roller 13, a gatherer 20, a draw trumpet 21, a belt conveyor 22 and a coiler device 23 are arranged in this order from the front bottom roller 13 side. The belt conveyor 22 passes through the gatherer 20, is bundled into one, advances obliquely downward, and changes the traveling direction of the sliver S after passing through the draw trumpet 21 again to convey the portion 22a. And a portion 22b for conveying in the horizontal direction on the upper side. In FIG. 1, the sliver S is illustrated in a state where it does not come into contact with each roller and the belt conveyor 22, but in actuality, the sliver S moves while being in contact with each roller and the belt conveyor 22.

  The coiler device 23 includes a coiler trumpet 24, a pair of coiler calendar rollers 25, and a tube wheel 26. Then, the sliver S that travels downward from the front end of the belt conveyor 22 and is compressed again by the coiler calender roller 25 is stored in the can 27 using the tube wheel 26.

Next, the configuration of the drive unit of the bottom roller of the draft device 11 will be described. As shown in FIG.
The front bottom roller 13 is driven by a front roller drive motor 28 from one end side (left side in FIG. 2). A gear train 29 is provided between the output shaft of the front roller drive motor 28 and one end of the front bottom roller 13.

  The middle bottom roller 14 is driven by a middle roller drive motor 30 from one end side (right side in FIG. 2). A gear train 31 is provided between the output shaft of the middle roller drive motor 30 and one end of the middle bottom roller 14.

  The back bottom roller 15 is driven by a back roller drive motor 32 from one end side (right side in FIG. 2). A gear train 33 is provided between the output shaft of the back roller drive motor 32 and one end of the back bottom roller 15.

  Servo motors are used for the respective drive motors 28, 30, 32. Each drive motor 28, 30, 32 is provided with a rotary encoder (not shown). Each drive motor 28, 30, 32 is electrically connected to a servo driver (servo amplifier) 34, 35, 36, and is controlled by a control device 37 via the servo drivers 34, 35, 36.

  The control device 37 includes a CPU (central processing unit) 38, a memory 39, and an input device (not shown). The CPU 38 is electrically connected to the rotary encoders of the drive motors 28, 30, and 32 via an input interface. The CPU 38 is electrically connected to the servo drivers 34, 35 and 36 via an output interface and a motor drive circuit, respectively. The CPU 38 is electrically connected to the outlet switch 40. As the outlet switch 40, a switch configured to be in an ON state only while being pressed, that is, an automatic return type switch is used.

  The memory 39 stores program data for controlling the servo drivers 34, 35 and 36 and various data necessary for the execution. The various data includes data corresponding to spinning conditions such as various fiber raw materials and spinning sliver thickness, and rotational speeds of the drive motors 28, 30, and 32 corresponding to draft ratios during steady operation. .

  Further, the memory 39 stores a control program at the time of mouth opening for controlling the front roller driving motor 28, the middle roller driving motor 30 and the back roller driving motor 32 so that the draft ratio becomes larger than the draft ratio at the time of steady operation at the time of mouth opening work. Is remembered. The CPU 38 and the outlet control program change the draft ratio for controlling the front roller drive motor 28, the middle roller drive motor 30 and the back roller drive motor 32 so that the draft ratio is larger than the draft ratio during steady operation during the opening operation. Configure the means. In this embodiment, the outlet control program is configured to change both the main draft ratio (draft ratio between the front roller and the middle roller) and the brake draft ratio (draft ratio between the middle roller and the back roller). Has been.

  The CPU 38 rotationally drives the front bottom roller 13, the middle bottom roller 14, and the back bottom roller 15 so that a draft ratio set in advance corresponding to the spinning conditions input by the input device during steady operation is obtained. The drive motors 28, 30, 32 are controlled. Further, the CPU 38 sets the main draft ratio and the brake draft ratio to be larger than the draft ratio at the time of steady operation while the outlet switch 40 is on, and the back roller drive motor 32 has a speed at the time of steady operation. The drive motors 28, 30, 32 are controlled. The draft ratio at the time of delivery is, for example, a draft ratio (preferably about twice the draft ratio at the time of steady operation) such that the thickness of the fleece F delivered from the draft device 11 at the time of delivery is half that of the steady operation. Is set.

  When increasing the draft ratio, the CPU 38 controls the drive motors 28, 30, and 32 so that the draft ratio reaches the target draft ratio as soon as possible. The CPU 38 controls the drive motors 28, 30, and 32 so as to gradually shift the draft ratio increased during the extraction operation to the draft ratio during the steady operation after the completion of the extraction operation.

  Next, the operation of the apparatus configured as described above will be described. Prior to the operation of the comber, spinning conditions such as the fiber raw material and the spinning count are input to the control device 37 by the input device. At the time of steady operation after the delivery operation is completed, each of the drive motors 28, 30, 32 is set in advance according to the spinning conditions based on the command from the control device 37 via the servo drivers 34, 35, 36. It is controlled to rotate at a rotation speed that is a ratio. Then, the fleece F drafted to a predetermined magnification by the draft device 11 passes through the gatherer 20 and the draw trumpet 21, is focused on one sliver S, and is conveyed to the coiler device 23 by the belt conveyor 22. The sliver S is compressed again by the coiler calendar roller 25 of the coiler device 23 and then accommodated in the can 27 via the tube wheel 26.

  On the other hand, at the time of the extraction work in preparation for the operation of the comber, the operator performs the extraction operation by inching the extraction switch 40. The CPU 38 controls the drive motors 28, 30, and 32 via the servo drivers 34, 35, and 36 so that the draft ratio is larger than the draft ratio during steady operation, that is, the draft magnification is increased during the extraction operation. To do. In this embodiment, each of the drive motors 28, 30, and 32 is such that the rotational speed difference between the front bottom roller 13 and the middle bottom roller 14 and the rotational speed difference between the middle bottom roller 14 and the back bottom roller 15 are both greater than those during steady operation. To control. In the present embodiment, the rotational speeds of the front bottom roller 13 and the middle bottom roller 14 are made larger than those during steady operation. Further, the back roller drive motor 32 is controlled so that the rotation speed of the back bottom roller 15 is the same as the rotation speed during steady operation. As a result, the thickness of the wide fiber bundle (fleece F) fed from the front rollers (front bottom roller 13 and front top roller 16) of the draft device 11 is reduced, and the amount of fibers per unit length is reduced. And the resistance at the time of the fleece F passing the gatherer 20 becomes small, and it will become easy to pass the gatherer 20, and the extraction work will become easy.

  In this embodiment, the CPU 38 controls the drive motors 28, 30, and 32 so that the draft ratio is larger than the draft ratio during steady operation while the outlet switch 40 is in the on state. Then, the operator performs an extraction operation by adjusting the ON state of the extraction switch 40 by inching the extraction switch 40 while observing the passage state of the fleece F gatherer 20 sent from the front roller.

  When the extraction operation is completed, the CPU 38 gradually shifts the draft ratio increased during the extraction operation to the draft ratio during steady operation. Then, steady operation is performed at a draft ratio set corresponding to the spinning conditions.

  Note that even when fleece breakage occurs between the draft device 11 and the gatherer 20, the operation of the comber is temporarily stopped and the opening operation is performed. Further, the sliver S spun at a draft ratio different from that during steady operation at the time of dispensing is not a product but is removed and collected.

According to this embodiment, the following effects can be obtained.
(1) Since the draft device 11 is controlled so that the draft ratio is larger than the draft ratio in the steady operation during the lead-out operation, the draft device 11 is controlled to have a wide width sent from the front roller of the draft device 11. The thickness of the fiber bundle (fleece F) is reduced and the amount of fibers per unit length is reduced. And the resistance at the time of a fiber bundle passing the gatherer 20 becomes small, and it becomes easy to pass the gatherer 20, and the success rate of an extraction work becomes high. As a result, the number of repetitions of the extraction work until the extraction operation is successful is reduced compared to the conventional case, and the steady operation can be started in a short time.

  (2) The control device 37 changes the draft ratio for controlling the front roller drive motor 28, the middle roller drive motor 30 and the back roller drive motor 32 so that the draft ratio becomes larger than the draft ratio at the time of steady operation during the opening operation. Means (CPU 38) are provided. Therefore, the control method (1) can be implemented, and the same effect as (1) can be obtained.

  (3) The draft ratio changing means (CPU 38) includes the front roller drive motor 28, the middle roller drive motor 30 and the back so that the draft ratio is larger than the draft ratio during steady operation while the outlet switch 40 is on. The roller drive motor 32 is controlled. Therefore, the operator can perform the mouthing work more appropriately by performing the inching operation of the mouthpiece switch 40 while observing the state where the fiber bundle (fleece F) passes through the gatherer 20.

  (4) The draft ratio changing means (CPU 38) gradually shifts the draft ratio increased during the extraction work to the draft ratio during steady operation. If the draft ratio increased during the delivery operation is suddenly changed to the draft ratio during steady operation, clogging of the gatherer 20 may easily occur depending on the spinning conditions. However, the occurrence of such a problem can be suppressed by gradually shifting the draft ratio increased during the extraction operation to the draft ratio during steady operation.

  (5) As the lead-out switch 40, a switch having a configuration that is turned on only while being pressed is used. Therefore, the inching operation of the extraction switch 40 by the operator is facilitated.

  (6) Both the main draft ratio and the brake draft ratio are changed so that the draft ratio becomes larger than the draft ratio during steady operation during the lead-out operation. It is possible to make the draft ratio larger than the draft ratio during steady operation by changing only one of the main draft ratio and the brake draft ratio, but only the front roller drive motor 28 is stationary. When driving at a higher speed than during operation, a large load is applied to the front roller drive motor 28 in order to spin the fleece F having a desired thickness. However, if both the main draft ratio and the brake draft ratio are changed, the occurrence of such a problem can be avoided.

  (7) The CPU 38 determines that the front bottom roller 13 and the middle bottom roller 14 and the middle bottom roller 14 and the middle bottom roller 14 and the back bottom roller 15 both have a larger rotational speed difference than the normal operation. The rotational speed of the bottom roller 14 is made larger than that during steady operation, and the back roller drive motor 32 controls the drive motors 28, 30, and 32 at the speed during steady operation. Therefore, the main draft ratio is increased by lowering the middle bottom roller 14 instead of increasing the speed of the front bottom roller 13, and the brake draft ratio is increased by lowering the back bottom roller 15 instead of increasing the speed of the middle bottom roller 14. Compared with the case, the control of the entire comb becomes easier. This is because if the middle bottom roller 14 and the back bottom roller 15 are made slower than in the steady operation and the main draft ratio and the brake draft ratio are increased, the speed of the sliver S sent from each combing head is made slower than in the steady operation. This is because not only the draft device 11 but also the control of the combing head needs to be changed from that in the steady operation.

The embodiment is not limited to the above, and may be embodied as follows, for example.
○ The present invention may be applied to a drafting machine for a drawing machine as a pre-spinning process. When applied to a drawing machine, as shown in FIG. 3, there is no belt conveyor 22 between the draft device 11 and the coiler device 23, and the draft device 11 has a plurality of slivers S that move horizontally. Arranged. The gatherer 20 is arranged so that the sliver S that has passed through the gatherer 20 advances straight downward toward the entrance of the coiler trumpet 24. In this embodiment, the same effect as that of the above embodiment can be obtained.

  In the comber, the draft device 11 is arranged above the coiler device 23 so that the sliver S that has passed through the gatherer 20 proceeds straight downward toward the inlet of the coiler trumpet 24 of the coiler device 23 like a drawing machine. It is good also as a structure.

  The middle bottom roller 14 and the back bottom roller 15 may be driven by a common servo motor. For example, as shown in FIG. 4, the middle roller drive motor 30 is omitted, and one end of the middle bottom roller 14 is connected to the gear train 41. And the gear train 43 which transmits rotation to the gear train 41 via the connection shaft 42 with respect to the gear train 33 is added. During the lead-out operation, the drive motors 28 and 32 are controlled so that the difference in rotational speed between the front bottom roller 13 and the middle bottom roller 14 is greater than that during steady operation. In this embodiment, the middle bottom roller 14 and the back bottom roller 15 are driven by a common back roller drive motor 32. Therefore, the number of motors can be reduced and the manufacturing cost can be reduced as compared with the configuration in which the front bottom roller 13, the middle bottom roller 14, and the back bottom roller 15 are driven by separate motors.

  ○ Instead of using servo motors controlled via servo drivers 34, 35, 36 as front roller drive motor 28, middle roller drive motor 30 and back roller drive motor 32, use motors controlled by inverters. Also good.

As the outlet switch 40, a switch other than the automatic return type switch, for example, a switch for selecting ON / OFF by switching the position of the lever may be used.
The CPU 38 controls the front roller drive motor 28, the middle roller drive motor 30 and the back roller so that the draft ratio becomes larger than that during the steady operation during the ON state of the outlet switch 40 and for a certain time after the outlet switch 40 is turned off. At least one of the drive motors 32 may be driven.

  The CPU 38 sets the draft ratio to be larger than the draft ratio during the steady operation for a predetermined time after the delivery switch 40 is turned on once, regardless of the on / off state of the delivery switch 40. The motor of the draft device may be controlled.

○ The draft ratio at the time of the extraction work may be configured so that the operator can select from a plurality of candidates.
O The draft ratio at the time of the extraction work may be configured such that the draft ratio changing means (CPU 38) selects from a plurality of values prepared in advance based on the spinning conditions.

  The draft device 11 is not limited to a three-wire draft device, and may be a four-wire or five-wire draft device. Further, a two-line draft device including a front roller and a back roller may be used. Then, the motor is controlled so that the draft ratio is larger than the draft ratio during steady operation during the extraction operation.

The guide roller 19 disposed on the front side of the draft device 11 may be omitted.
The pre-spinning process is not limited to a drawing machine and a comber, but may be applied to a spinning machine including a process of drafting a plurality of slivers and then binding them to one sliver, for example, a sliver wrap machine or a ribbon wrap machine.

  ○ The pre-spinning process is not limited to a spinning machine having a process of drafting a plurality of slivers and then bundling them into one sliver, and a process of making a wide fiber bundle (web) drafted by a draft device like a card into a sliver A spinning machine equipped with

The following technical idea (invention) can be understood from the embodiment.
(1) In the invention according to claim 3, the draft ratio changing means sets the draft ratio for a certain period of time after the outlet switch is turned off so that the draft ratio is the same as that during the ON state of the outlet switch. Control the motor.

  DESCRIPTION OF SYMBOLS 11 ... Draft apparatus, 13 ... Front bottom roller, 15 ... Back bottom roller, 37 ... Control apparatus, 38 ... CPU as draft ratio change means, 40 ... Feeding switch.

Claims (5)

A control method for a drafting device in a pre-spinning process including a drafting device in which a front bottom roller and a backbottom roller are independently driven by a motor, and a wide fiber bundle fed from the drafting device is inserted into a gatherer A draft device control method in a pre-spinning process, characterized in that the draft device is controlled so that the draft ratio becomes larger than the draft ratio during steady operation during the lead-out operation that converges to the sliver .   The drafting device for the pre-spinning process according to claim 1, wherein the drafting device is controlled so that the rotational speed of the front bottom roller is larger than that during steady operation, and the back bottom roller is at a steady running speed. Control method. A control device for a drafting device in a pre-spinning process having a draft device in which the front bottom roller and the back bottom roller are independently driven by a motor, and a wide fiber bundle fed from the draft device is inserted into the gatherer And a draft ratio changing means for controlling the motor so that the draft ratio becomes larger than the draft ratio during steady operation during the lead-out operation that converges to the sliver. Control device.   4. The control device for a drafting device in a pre-spinning process according to claim 3, wherein the draft ratio changing means controls the motor so that the draft ratio is in the large state while the outlet switch is in an ON state.   5. The control device for a drafting device in a pre-spinning process according to claim 3 or 4, wherein the draft ratio changing means gradually shifts the draft ratio increased during the opening operation to the draft ratio during steady operation.

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