• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A method of controlling a spinner comprising a pneumatic exhaust device includes: detecting a wire break using wire break sensors arranged correspondingly with spindles; in response to the detection of the yarn break, the operation of a fiber bundle stopping device which is configured to cut a bundle of fibers to be fed to the spindle on which the yarn break occurred. produced, thereby stopping the feeding of the fiber bundle to a drawing device, the section of the bundle of fibers which has been cut by the fiber bundle stopping device downstream in the direction of flow of the fiber bundle relative to the fiber bundle stopping device being the downstream fiber bundle section; increasing the suction force of a suction portion that is configured to aspirate and remove the downstream fiber bundle section in response to the detection of wire breakage. The suction force of the suction portion decreases when the downstream fiber bundle section has been sucked at least partially by the suction portion.
    公开号:CH712037A2
    申请号:CH00086/17
    申请日:2017-01-27
    公开日:2017-08-15
    发明作者:Mizuno Yusuke；Shinozaki Yutaka
    申请人:Toyota Jidoshokki Kk；
    IPC主号:
    专利说明:

    Description
    Background of the Invention [0001] The present invention relates to a method for controlling a spinning machine comprising a pneumatic evacuation device and a spinning machine.
    When a wire break occurs during spinning by a spinning machine, wick or ribbon (hereinafter generically referred to as fiber bundle) may become entangled around a front roll or similar of a drawing device, thereby preventing the thread from being tied back. To solve this problem, the spinning machine comprises a pneumatic exhaust device which sucks and removes a bundle of fibers, using air, from the spindle on which a wire break has occurred (see for example the Japanese Patent Publication Laid-open No. 57-154,423). The pneumatic exhaust device comprises a pneumatic conduit, which extends in the longitudinal direction of the spinning machine. A suction nozzle (a suction part), which extends towards the front roller, is arranged in the pneumatic line. A source of negative pressure produces a negative pressure in the pneumatic line. If a wire break is detected by any of the wire break sensors, which are correspondingly arranged with the pins, the pneumatic exhaust device continuously adjusts the negative pressure of the negative pressure source to increase the force. suction of a suction air flow, which is produced in the suction nozzle, until the hooking of the thread by the operator is performed. The suction airflow draws in and removes the fiber bundle from the spindle on which the wire break occurred. When thread reconnection by the operator is performed, a wire break detection signal from the wire break sensor is interrupted and the negative pressure of the negative pressure source is reduced to the value before the increase.
    In a spinning machine that threads threads from bundles of fibers, multiple pins spin simultaneously. Even if a wire break occurs on any of the pins during spinning, the remaining pins continue to spin. If the spinning machine is adapted to continue feeding a fiber bundle to the pin on which the wire break occurred, and sucks and retrieves the bundle of fibers, which is discharged from a drawing device by using a pneumatic discharge device, the unnecessary feeding of the fiber bundle continues until the hooking of the wire is started on the pin on which the wire break has occurred. To solve this problem, some spinning looms include a fiber bundle power-off device which, upon detection of a wire break by a wire break sensor, cuts the bundle of fibers to be fed to the pin on which the wire break occurred, thereby stopping feeding of the fiber bundle to the drawing device. In this case, in response to the detection of the yarn break by the yarn break sensor, the feeding of the fiber bundle to the drawing device from the spindle on which the yarn break occurred is stopped. by the fiber bundle power off device, and the negative pressure of the negative pressure source is adjusted to increase the suction force of the suction air flow produced in the corresponding suction nozzle. Then, a fiber bundle section on the downstream side of the bundle of fibers that has been cut by the fiber bundle stopping device, which bundle section is located downstream in the fiber bundle flow direction relative to the fiber bundle supply stop device, is fully discharged from the drawing device, then sucked up and removed by the pneumatic exhaust device.
    However, according to the pneumatic exhaust device of Japanese Patent Laid-open Publication No. 57-154,423, even after the downstream fiber bundle section is fully aspirated and removed by the device. pneumatic exhaust, the increased state of the suction force of the suction air flow produced in the suction nozzle is maintained until the operator reaches the pin on which the wire break s is produced and reconnects the wire. This leads to unnecessary consumption of the energy generated by the pneumatic exhaust device. SUMMARY OF THE INVENTION [0005] Accordingly, an object of the present invention is to limit the unnecessary consumption of energy produced by a pneumatic exhaust device.
    To achieve the above objective and according to one aspect of the present invention is provided a method for controlling a spinning machine comprising a pneumatic exhaust device. The method comprises: detecting a wire break using wire break sensors arranged correspondingly with pins; in response to the detection of the yarn break, the operation of a fiber bundle stopping device which is configured to cut a bundle of fibers to be fed to the spindle on which the yarn break occurred. produced, thereby stopping the feeding of the fiber bundle to a drawing device, wherein a section of the bundle of fibers which has been cut by the fiber bundle stopping device downstream in a direction of flow of the fiber bundle relative to the fiber bundle stopping device is a downstream fiber bundle section; increasing a suction force of a suction portion which is configured to suck and remove the downstream fiber bundle section in response to the detection of wire breakage; and decreasing the suction force of the suction portion when the downstream fiber bundle section has been sucked at least partially by the suction portion.
    To achieve the above objective and according to another aspect of the present invention, there is provided a spinning machine which comprises wire break sensors, a fiber bundle power off device, a pneumatic exhaust device, and a control section. The wire break sensors are correspondingly arranged with pins and each is configured to detect a wire break. The fiber bundle stopping device is configured to cut a bundle of fibers to be fed to one of the pins on which the wire break has occurred in order to stop feeding the fiber bundle to a device stretching. The pneumatic exhaust device has a suction portion configured to aspirate and remove a downstream fiber-bundle section of the fiber bundle that has been cut by the fiber bundle power-off device. The downstream fiber bundle section is located downstream in a flow direction of the bundle of fibers with respect to the fiber bundle stopping device. The control section is configured to operate the fiber bundle power off device and increase a suction force of the suction portion in response to the detection of the wire break by the corresponding sensor among the wire break sensors. The control section is configured to decrease the suction force of the suction portion when the downstream fiber bundle section has been sucked at least partially by the suction portion.
    Other aspects and advantages of the present invention will emerge more clearly on reading the description below, made with reference to the accompanying drawings, illustrating by way of example the principles of the invention.
    Brief Description of the Drawing [0009] The invention, as well as the objects and advantages thereof, may best be understood by reference to the following description of the presently preferred embodiments together with the accompanying drawing in which: 0010] FIG. 1 is a diagram showing the complete configuration of a spinning machine according to one embodiment. Detailed Description of the Preferred Embodiments [0011] An embodiment of the present invention will now be described with reference to FIG. 1.
    As shown in FIG. 1, a ring spinning machine 10 comprises a three-roll drawing device 11, which has a front roll 11a, an intermediate roll 11b and a rear roll 11c. SI locks, each of which serves as a bundle of fibers, are each fed to the rear roller 11c from a wick coil suspended from a not shown creel. After being fed to the rear roller 11c, each wick S1 is drawn and made into fleece through the rear roller 11c, the intermediate roller 11b and the front roller 11a. The fleece is then formed into a yarn and the yarn is wound around a corresponding spool of spools 12a, which are correspondingly arranged with spindles 12, via a spiral cable not shown and a slider not shown.
    The ring spinning machine 10 comprises wire breaking sensors 13 correspondingly arranged with the pins 12. The pins 12 of the ring spinning machine 10 spin simultaneously. If a wire break occurs on any of the pins 12 during spinning, the remaining pins 12 continue to spin. Therefore, in the ring spinning machine 10, wick feed stop devices 14 (fiber bundle stop devices) are arranged correspondingly with the pins 12. When a break occurs of wire occurs with any of the wicks SI provided by the drawing device 11, the corresponding stop device among the wick feed stop devices 14 intersects the wick SI to feed to the pin 12 on which the wire break occurred and stops feeding the wick SI to the drawing device 11. The wick feeding stop device 14 is arranged upstream in the direction of flow of the wick SI by relative to the rear roller 11c. In the wick SI which has been cut off by the wick supply stop 14, a section downstream in the direction of flow of the wick SI with respect to the wick feed stop 14 will be designated as downstream wick section S1a (downstream fiber bundle section).
    The ring spinning machine 10 comprises a pneumatic evacuation device 15 which sucks and removes, using air, the wick SI of the spindle 12 on which the wire break has occurred. The pneumatic discharge device 15 has a pneumatic duct 16 which extends in the longitudinal direction (left-right direction as illustrated in Fig. 1) of the ring spinning machine 10 and a filter housing 17, which is connected to one end of the pneumatic conduit 16. The filter housing 17 contains a filtering portion 18, a fan 19 and a motor 20 which controls the fan 19. An aeration hole (not shown) is arranged in the filter housing 17 so that to evacuate the air that has been sucked by the fan 19. The fan 19 is controlled to cause a suction effect so that a negative pressure acts in the pneumatic line 16. The fan 19 thus serves as a source of pressure negative.
    The pneumatic duct 16 has suction nozzles 16a which serve as suction parts and are arranged correspondingly with the pins 12. When the wick S1 corresponding to the pin 12 on which the wire break occurred. produced is cut off by the corresponding wick feeding device 14, a suction air flow produced in the corresponding suction nozzle 16a draws in and removes the downstream wick section S1a from the wick S1.
    The ring spinning machine 10 comprises an inverter 21, which controls the number of revolutions of the motor 20, and an inverter controller 22, which controls the operation of the inverter 21. The inverter controller 22 is formed, for example, by one or more processing circuits operating in accordance with computer programs (software). Each of the processing circuits has a central processing unit and memories (including a ROM and a RAM), which store programs to be executed by the central processing unit. The inverter controller 22 outputs a control signal for controlling the number of revolutions of the motor 20 to the inverter 21. Based on the control signal outputted by the inverter controller 22, the inverter 21 controls the number of revolutions of the motor 20. By controlling the number of revolutions of the motor 20, the suction force of the suction air flow produced in each suction nozzle 16a is adjusted. Specifically, the higher the number of revolutions of the motor 20, the more the suction force of the suction nozzle 16a increases. The lower the number of revolutions of the motor 20, the lower the suction force of the suction nozzle 16a.
    The ring spinning machine 10 comprises a wick supply stop device controller 25. The wick supply stop device controller 25 is formed, for example, by one or more worm feed circuits. treatment operating in accordance with computer programs (software). Each of the processing circuits has a central processing unit and memories (including a ROM and a RAM), which store programs to be executed by the central processing unit. The wick supply stop controller 25 is electrically connected to each of the wire break sensors 13 via a signal line 25a. When any one of the wire break sensors 13 detects a wire break, the wire break sensor 13 delivers a detection signal to the wick supply stop controller 25 via the signal line 25a. On the basis of the detection signal delivered by the wire break sensor 13, the wick supply stop controller 25 identifies the pin on which the wire break occurred, i.e. say a wire breaking pin.
    The wick supply stop controller 25 is also electrically connected to each of the wick supply stop devices 14 via a signal line 25b. After identifying the wire break pin, the wick power off controller 25 outputs a wick power off command to the stop device among the power off devices. wick feed 14 which corresponds to the broken wire pin identified via the signal line 25b.
    In addition, the wick supply stop controller 25 is electrically connected to the inverter controller 22 via a signal line 25c. When, in response to a wire break, the detection signal of the corresponding wire break sensor 13 is delivered to the wick supply stop controller 25 via the signal line 25a, a notification signal is issued from the wick supply stop controller 25 to the inverter controller 22 via the signal line 25c to inform that the wire break has occurred.
    The inverter controller 22 stores, in advance, the suction time necessary to allow the suction of the entire wick section downstream S1a, which has been cut by the power supply stop device wick 14 corresponding to the pin 12 on which the wire break occurred, by the corresponding suction nozzle 16a. The required suction time is determined according to spinning conditions including wick weight S1, draw ratio, roll class of draw roll, spindle speed and yarn twisting count. .
    The inverter controller 22 has a timer 22a. Upon receipt of the notification signal from the wick power-off device controller 25 via the signal line 25c, the inverter controller 22 sets the necessary suction time, which is stored at the same time. in advance, on the timer 22a. The timer 22a measures the time for which an increase in the number of revolutions of the motor 20 is maintained by the inverter controller 22. In the present embodiment, the wick power-off controller 25 and the controller inverter 22 form a control device or a control section.
    The operation of this embodiment will be described hereinafter.
    In response to a wire break, the corresponding one of the wire break sensors 13 delivers a detection signal to the wick supply stop device controller 25 via the signal line 25a. The wick stopping device controller 25 then outputs a notification signal informing that the wire break has occurred to the inverter controller 22 via the signal line 25c. Upon receipt of the notification signal from the wick power-off device controller 25 via the signal line 25c, the inverter controller 22 sets the necessary suction time, which is stored at the same time. in advance, on the timer 22a and output to the inverter 21, a control signal for increasing the number of revolutions of the motor 20 from the time before the wire break. The number of revolutions of the motor 20 is thus increased with respect to the moment before the wire break and the suction force of each suction nozzle 16a is increased with respect to the moment before the wire break. The suction air flow produced in the suction nozzle 16a therefore sucks the downstream wick section S1a, which has been cut off by the wick supply stop 14 corresponding to the pins 12 on which the wire break occurred.
    The timer 22a measures the time for which an increase in the number of revolutions of the motor 20 is maintained by the inverter controller 22. When the time measured by the timer 22a reaches the required suction time, the controller of Inverter 22 outputs to the inverter 21 a control signal for decreasing the number of revolutions of the motor 20 so that the number of revolutions of the motor 20 becomes equal to the value preceding the wire break. This decreases the number of revolutions of the motor 20, thereby reducing the suction force of the suction nozzle 16a. This means that the inverter controller 22 of the present embodiment executes a command to decrease the suction force of each suction nozzle 16a when the downstream wick section S1a, which has been cut off by the device. corresponding wick feed stop 14, is sucked entirely by the corresponding suction nozzle 16a.
    In response to the detection of the wire break in one of the pins 12 by the corresponding sensor among the wire break sensors 13, the downstream side Wick section S1a is cut by the stop device of corresponding wick feed 14 and is sucked by the corresponding suction nozzle 16a. During suction, a wire break can be detected in a different one of the pins 12 by the corresponding sensor among the wire break sensors 13. In this case, the wick supply stop device controller 25 delivers another notification signal, which informs that the wire break has occurred, to the inverter controller 22 via the signal line 25c. The inverter controller 22 then resets the time that has been measured by the timer 22a and again sets the necessary suction time, which is stored in advance, on the timer 22a. When the time measured by the timer 22a reaches the required suction time, the inverter controller 22 outputs to the inverter 21 a control signal for decreasing the number of revolutions of the motor 20 so that the the number of revolutions of the motor 20 becomes equal to the value preceding the breaking of the wire. This decreases the number of revolutions of the motor 20, thereby reducing the suction force of the suction nozzle 16a. That is, while the wick S1 corresponding to one of the pins 12 is being sucked by the corresponding one of the suction nozzles 16a, a wire break in a different pin 12 can be detected by the corresponding sensor among the wire break sensors 13. In this case, when the downstream wick section S1a corresponding to the different pin 12, which has been cut by the corresponding wick feed stop device 14, is sucked entirely by the corresponding suction nozzle 16a, the inverter controller 22 of the present embodiment executes a control for decreasing the suction force of each suction nozzle 16a.
    The embodiment described above has the following advantages.
    [0027] (1) The inverter controller 22 executes a control for decreasing the suction force of each suction nozzle 16a when the downstream wick section S1a is sucked by the corresponding suction nozzle 16a. Therefore, once the downstream wick section S1a is fully aspirated and removed by the suction nozzle 16a, the suction force of the suction nozzle 16a is not maintained in an increased state. This prevents unnecessary consumption of energy generated by the pneumatic exhaust device 15.
    (2) The inverter controller 22 executes a control for decreasing the suction force of each suction nozzle 16a when the downstream wick section S1a is sucked entirely by the corresponding suction nozzle 16a. In this way, the downstream wick section S1a is sucked in completely by the suction nozzle 16a reliably.
    (3) While the downstream wick section S1 a corresponding to one of the pins 12 is being sucked by the corresponding nozzle of the suction nozzles 16a, a wire break in a spindle 12 in this case, when the downstream wick section S1a corresponding to the different pin 12, which has been cut off by the power supply stop device, can be detected by the corresponding sensor among the wire break sensors 13. wick 14, is sucked entirely by the corresponding suction nozzle 16a, the inverter controller 22 executes a control for decreasing the suction force of the suction nozzles 16a. Accordingly, even if a wire break occurs in a different pin 12 while the downstream wick section S1 a corresponding to one of the pins 12 is being sucked, the suction force of the nozzle suction 16a which sucks the wicking section downstream S1 a corresponding to the different pin 12 does not decrease during said suction. This decreases the probability of failure with respect to the suction and removal of the downstream wick section S1 a corresponding to the different pin 12.
    The embodiment as described above can be modified in the following manner.
    The inverter controller 22 may execute a control for decreasing the suction force of each suction nozzle 16a when the downstream wick section S1a, which has been cut off by the power off device. wick 14 corresponding, is partially sucked by the corresponding suction nozzle 16a. This means that the necessary suction time, which is stored in advance, may be shorter than the time required for the suction nozzle 16a to suck the entire downstream wick section S1a. This is because when the downstream wick section S1a is partially introduced into the suction port of the suction nozzle 16a, the downstream wick section S1a can be sucked up and removed even though the suction force decreases. However, to suck up and remove the downstream wick section S1a more reliably, it is desirable that the necessary suction time be defined as the time required for the suction nozzle 16a to suck the entire wick section aside downstream S1a.
    A sensor for detecting whether the downstream wick section S1a has been sucked by the corresponding suction nozzle 16a can be arranged, for example, near the opening of the suction nozzle 16a at the level of a downstream position in the direction of flow of the wick S1 with respect to the front roller 11a. In this case, the timer 22a can be used or not.
    An opening / closing flap, which functions as a restrictor, can be arranged in the pneumatic duct 16 so that, by controlling the degree of opening of the valve, the passage area of the pneumatic duct 16 is adjusted to adjust the suction force of each suction nozzle 16a. In this case, the number of revolutions
    权利要求:
    Claims (4)
    [1]
    the motor 20 can be controlled so as to be constant. Alternatively, the pneumatic conduit 16 may be divided into multiple pipe sections in the longitudinal direction of the spinning machine 10. An opening / closing valve may be arranged in each of the pipe sections so that only the the driving section corresponding to the pin 12 on which a wire break has occurred is open and selectively closed. The wick supply stop controller 25 and the inverter controller 22 may be combined as a single controller. [0035] A flute-type suction part may be used as a suction part. The fiber bundle is not limited to the wick S1 but can be a ribbon. The spinning machine may be, for example, a ring spinning machine that spins a yarn from a ribbon using a stretching device that stretches a bundle of fibers in a draw ratio significantly higher than that a normal three-roll drawing device. The spinning machine is not limited to a ring spinning machine but perhaps, for example, a fascia spinning machine or a friction spinning machine. Therefore, the present examples and embodiments should be considered illustrative and not restrictive, and the invention should not be limited to the details provided herein, but may be modified in the scope and equivalence of appended claims. claims
    A method for controlling a spinning machine comprising a pneumatic exhaust device, the method comprising: detecting a wire break using wire break sensors arranged correspondingly with pins; in response to the detection of the yarn break, the operation of a fiber bundle stopping device which is configured to cut a bundle of fibers to be fed to the spindle on which the yarn break occurred. produced, thereby stopping the feeding of the fiber bundle to a drawing device, wherein a section of the bundle of fibers which has been cut by the fiber bundle stopping device downstream in a direction of flow of the fiber bundle relative to the fiber bundle stopping device is a downstream fiber bundle section; and increasing a suction force of a suction portion that is configured to aspirate and remove the downstream fiber bundle section in response to the detection of wire breakage, the method being characterized by decreasing the suction force of the suction part when the downstream fiber bundle section has been sucked at least partially by the suction part.
    [2]
    The method of claim 1, characterized by decreasing the suction force of the suction portion when the downstream fiber bundle section has been fully drawn by the suction portion.
    [3]
    The method of claim 2, characterized by, while the downstream fiber bundle section is being sucked by the suction portion in response to detecting a wire break in one of the pins by the corresponding sensor among the wire break sensors, if a wire break in a different one of the pins is detected by the corresponding one of the wire break sensors, the decrease of the suction force of the suction part when a downstream side fiber bundle section corresponding to a different one of the pins has been sucked in entirely by the suction part.
    [4]
    A spinning machine comprising: wire break sensors arranged correspondingly with pins and each configured to detect a wire break; a fiber bundle stopping device configured to cut a bundle of fibers to be fed to one of the pins on which the wire break has occurred in order to stop feeding the fiber bundle to a fiber device 'drawing; a pneumatic exhaust device having a suction portion configured to suck and remove a downstream fiber bundle section of the bundle of fibers which has been cut by the fiber bundle supply stop device; a downstream fiber bundle being located downstream in a flow direction of the bundle of fibers with respect to the fiber bundle stopping device; and a control section configured to operate the fiber bundle power-off device and to increase a suction force of the suction portion in response to the detection of the wire break by the corresponding sensor among the wire-breaking sensors, the spinning machine being characterized in that the control section is configured to decrease the suction force of the suction part when the downstream fiber-beam section has been sucked at least partially by the suction part.
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    同族专利:
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    JP2017137605A|2017-08-10|
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP2016020849A|JP6569551B2|2016-02-05|2016-02-05|Control method of pneumatic clearer device in spinning machine|
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