JP2009242972A - Spinning apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a spinning apparatus that collectively manages pressures in a plurality of air spinning units. <P>SOLUTION: A spinning machine 1 includes a plurality of spinning units 2, and a unit controller 32 and a frame control device 42 which serve as a pressure collective management device. Each of the air spinning units includes a whirling flow generating chamber and a pressure sensor 63. The whirling flow generating chamber internally generates a whirling air flow to twist fibers. The pressure sensor detects pressure inside the whirling flow generating chamber. The unit controller 32 includes a receiving section 28 and a pressure abnormality determining section 37. The receiving section 28 can receive a pressure value signal from each of the pressure sensors 63. The pressure abnormality determining section 37 compares the pressure value with a predetermined threshold value to determine whether or not the pressure in each of the air spinning units 2 is abnormal. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a spinning device including a plurality of pneumatic spinning units.

  In Patent Document 1, in a spinning device (spinning machine) that twists fibers by a swirling air flow generated by an air spinning nozzle, a pressure sensor detects the pressure of an air exhaust space communicating with a hollow chamber for spinning. The configuration is disclosed. When the detected pressure value exceeds a threshold value preset in the pressure sensor, the spinning device of Patent Document 1 determines that the fiber is in an accumulated state and stops the spinning operation. It is assumed that a state in which a defect is likely to occur in the spun yarn can be easily detected by this configuration.

The spinning device of Patent Document 1 includes a large number of pneumatic spinning units, and the pressure sensor is provided in each pneumatic spinning unit. And said threshold value is preset to each pressure sensor, and each pressure sensor performs the detection of the fiber accumulation state by the comparison with a pressure detection value and a threshold value separately.
JP 2006-132035 A

  However, in the above configuration, the threshold value must be set for each pressure sensor, which is cumbersome. For this reason, it has been difficult to improve the quality of the product by changing the threshold value for a plurality of spinning units at once or by appropriately setting the threshold value in consideration of individual differences among the units. Further, in the configuration of Patent Document 1, it is impossible to collectively manage the entire apparatus including the history of changes in the detection value of the pressure sensor and the grasp of the state. Furthermore, since the configuration for setting the threshold value and detecting the fiber accumulation state is required for each pressure sensor (for each spinning unit), the number of parts in the entire apparatus is large and the cost is high.

  The present invention has been made in view of the above circumstances, and a main object thereof is to provide a spinning device that collectively manages the pressures of a plurality of pneumatic spinning units provided in the spinning device.

Means and effects for solving the problems

  The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

  According to an aspect of the present invention, a spinning device having the following configuration is provided. That is, the spinning device includes a plurality of pneumatic spinning units and a pressure collective management device. Each of the pneumatic spinning units includes a hollow chamber that generates a swirling air flow inside and twists the fiber, and a pressure sensor that detects the pressure in the hollow chamber. The pressure collective management device includes a pressure detection value receiving unit and a pressure abnormality determination unit. The pressure detection value receiving unit can receive a pressure value signal from each of the pressure sensors. The pressure abnormality determination unit determines whether or not there is an abnormality in the pressure of each of the pneumatic spinning units by comparing the pressure value with a predetermined threshold value.

  With this configuration, occurrence of pressure abnormalities in a plurality of pneumatic spinning units can be collectively detected, and management of each pneumatic spinning unit is facilitated. In addition, since it is not necessary to provide a configuration for determining an abnormality in each pneumatic spinning unit, the configuration of the apparatus is simplified and the cost can be reduced.

  The spinning device preferably has the following configuration. That is, the pressure collective management apparatus includes a storage unit and a threshold setting unit. The storage unit can store the threshold value for each of the pneumatic spinning units. The threshold setting unit determines the threshold based on the pressure value detected by the pressure sensor, and stores the threshold in the storage unit.

  With this configuration, it is possible to set an appropriate threshold according to the individual difference between each pneumatic spinning unit and the pressure sensor, so that accurate abnormality detection can be performed. Moreover, the pressure batch management device collectively performs the setting of the threshold value and the storage of the threshold value, thereby making it easier to manage each pneumatic spinning unit.

  In the spinning apparatus, it is preferable that the threshold setting unit sets the threshold of each pneumatic spinning unit using a pressure value when at least one pneumatic spinning unit is idling.

  With this configuration, the threshold value can be set in consideration of the pressure tendency between the pneumatic spinning units. Therefore, a more favorable threshold value can be set as compared with the case where a uniform threshold value is used for all the pneumatic spinning units.

  In the spinning apparatus, the threshold value setting unit sets, as the threshold value of the pneumatic spinning unit, a value obtained by multiplying a spinning pressure value at a predetermined time of each pneumatic spinning unit by a predetermined coefficient. It is preferable.

  With this configuration, it is possible to set a suitable threshold value for each pneumatic spinning unit in consideration of variations due to individual differences between pneumatic spinning units while performing unified management. As a result, it is possible to detect defective yarn with higher accuracy and prevent erroneous detection.

  In the spinning apparatus, the threshold value setting unit sets the threshold value of each pneumatic spinning unit using a pressure value when the pneumatic spinning unit is idled at least one of the pneumatic spinning units, and It is preferable that the second mode in which a value obtained by multiplying a pressure value at the time of spinning of the pneumatic spinning unit by a predetermined coefficient is set as the threshold value of the pneumatic spinning unit can be switched.

  With this configuration, since the operator can change the setting as appropriate, an optimum threshold value can be set according to the situation. As a result, it is possible to detect defective yarn with higher accuracy and prevent erroneous detection.

  In the spinning device, it is preferable that the pressure collective management device includes a calibration execution unit capable of calibrating the pressure sensors of the plurality of pneumatic spinning units.

  With this configuration, the pressure sensors of a plurality of pneumatic spinning units can be calibrated together. Therefore, management of each pneumatic spinning unit becomes easier, and the accuracy of the pressure detection value can always be kept constant.

  The spinning device preferably includes an information display unit capable of displaying information related to the pressure sensor or a detected value thereof.

  With this configuration, it becomes easy to display information related to the pressures of a plurality of pneumatic spinning units collectively or in an aggregated manner, so that the operator can easily grasp the overall situation.

  Preferred embodiments of the present invention will be described below with reference to the drawings.

  A spinning machine 1 as a spinning device shown in FIG. 1 includes a large number of spinning units (air spinning units) 2 arranged side by side. In the present embodiment, a spinning unit group 2G is provided with four spinning units 2 as a set. Each spinning unit group 2G is provided with one unit controller 32 described later. The spinning machine 1 includes a yarn splicing cart 3, a blower box 4, and a prime mover box 5. The yarn splicing cart 3 is configured to be able to travel in the direction in which the spinning units 2 are arranged.

  The prime mover box 5 includes a machine base control device 42. The machine control device 42 includes a control panel (information display unit) 38. The control panel 38 has a color liquid crystal monitor 48, and displays information on the operating status and yarn quality of each spinning unit 2 using characters, numerical values, tables, graphs, and the like by appropriate operations of the operator. be able to. An input unit 47 is provided in the vicinity of the color liquid crystal monitor 48. The input unit 47 includes a plurality of input keys, and is used by an operator to select information to be displayed on the color liquid crystal monitor 48. In addition, an appropriate instruction is transmitted to each spinning unit 2 and various conditions are set. It is configured to be able to.

  As shown in FIG. 1, each spinning unit 2 includes a draft device 7, a spinning unit 9, a yarn feeding device 11, and a winding device 12 as main components. The draft device 7 is provided in the upper part of the casing 6 of the spinning machine 1 and is configured such that the fiber bundle 8 sent from the draft device 7 is spun by the spinning unit 9. The spun yarn 10 discharged from the spinning unit 9 is fed by the yarn feeding device 11 and then wound by the winding device 12 to form a package 45.

  The draft device 7 is for drawing the sliver 13 into the fiber bundle 8. As shown in FIG. 2, the draft device 7 includes four rollers: a back roller 14, a third roller 15, a middle roller 17 on which an apron belt 16 is mounted, and a front roller 18.

  A draft motor 31 composed of an electric motor is installed at an appropriate position of the housing 6, and the back roller 14 and the third roller 15 are connected to the draft motor 31 via a belt. The driving and stopping of the draft motor 31 is controlled by the control unit 72 of the unit controller 32. In the spinning machine 1 of the present embodiment, an electric motor for driving the middle roller 17 and the front roller 18 is also provided in the housing 6, but illustration thereof is omitted here.

  The yarn feeder 11 includes a delivery roller 39 supported by the casing 6 of the spinning machine 1 and a nip roller 40 disposed so as to contact the delivery roller 39. With this configuration, the spun yarn 10 discharged from the spinning unit 9 is sandwiched between the delivery roller 39 and the nip roller 40, and the delivery roller 39 is rotated by an electric motor (not shown), whereby the spun yarn 10 is moved to the winding device 12 side. To send.

  A notification lamp (notification means) 71 is installed in front of the housing 6 so that the operator can be notified of the presence or absence of an abnormality in the spinning unit 9. The notification lamp 71 is connected to the unit controller 32.

  As shown in FIGS. 1 and 2, the yarn joining cart 3 includes a splicer (yarn joining device) 43, a suction pipe 44, and a suction mouth 46. As shown in FIG. 1, the yarn splicing carriage 3 is provided so as to run on a rail 41 provided on the housing 6 of the spinning machine 1 main body. When yarn breakage or yarn cut occurs in a spinning unit 2, the yarn splicing carriage 3 travels to the spinning unit 2 and stops. The suction pipe 44 sucks and captures the yarn end discharged from the spinning unit 9 and guides it to the splicer 43 while rotating in the vertical direction about the axis. The suction mouse 46 sucks and captures the yarn end from the package 45 rotatably supported by the winding device 12 while rotating in the vertical direction around the shaft, and guides it to the splicer 43. The splicer 43 is configured to perform splicing between guided yarn ends.

  As illustrated in FIGS. 2 and 3, the spinning unit 9 includes blocks divided into two, that is, a first block 91 and a second block 92. In the traveling direction of the fiber bundle 8, the second block 92 is provided on the downstream side of the first block 91. As shown in FIG. 3, the air spinning nozzle 19 is provided in the first block 91, and the hollow guide shaft body 20 is provided in the second block 92. The air spinning nozzle 19 is configured to cause a swirling flow to act on the fiber bundle 8 while inserting the fiber bundle 8 sent from the front roller 18. The hollow guide shaft body 20 is disposed so that the tip end portion thereof is inserted into the pneumatic spinning nozzle 19 with the axis line being coincident.

  The pneumatic spinning nozzle 19 includes a needle holder 23 and a nozzle block 34. The first block 91 includes a nozzle portion casing 53, and the nozzle block 34 is supported by the nozzle portion casing 53. A guide hole 21 is formed in the needle holder 23, and the fiber bundle 8 drafted by the upstream draft device 7 is introduced into the guide hole 21. The needle holder 23 holds a needle 22 disposed on the flow path of the fiber bundle 8 discharged from the guide hole 21.

  A tapered hole 54 is formed in the nozzle block 34 at a position downstream of the needle holder 23. And the front-end | tip part 24 of the said hollow guide shaft body 20 is inserted in this taper hole 54, making an axis line correspond. The tip portion 24 is formed in a taper shape, and the taper angle thereof is substantially equal to the taper angle of the taper hole 54. A circular spinning chamber 26 is formed between the tip surface of the hollow guide shaft 20 and the needle holder 23, and the tip of the needle 22 protrudes into the spinning chamber 26. The tip of the needle 22 is disposed so as to face the tip surface of the hollow guide shaft body 20.

  The distal end portion 24 of the hollow guide shaft body 20 is disposed so as to form a predetermined gap with the tapered hole 54. Thus, a swirl flow generation chamber (hollow chamber) 25 is formed, and the swirl flow generation chamber 25 communicates with the spinning chamber 26. An air discharge space 55 is formed in the nozzle casing 53, and the air discharge space 55 communicates with the swirl flow generation chamber 25. An unillustrated negative pressure source (suction means) disposed in the blower box 4 is connected to the air discharge space 55 through a pipe 60.

  The nozzle block 34 is formed with a plurality of swirl flow generating nozzles 27 whose outlet ends are opened to the spinning chamber 26. These swirl flow generating nozzles 27 are formed by elongated holes formed in the nozzle block 34. The holes are formed in the tangential direction of the spinning chamber 26, and the longitudinal direction is slightly inclined to the downstream side of the yarn feed. ing. The swirl flow generating nozzle 27 injects compressed air supplied from a compressed air source (not shown) into the spinning chamber 26 to generate, for example, a swirl flow counterclockwise in plan view (see FIG. 6) in the spinning chamber 26. The swirling flow spirally flows downstream along the swirling flow generating chamber 25 and is then discharged from an air discharge space 55 formed in the nozzle casing 53.

  The hollow guide shaft body 20 includes a cylindrical body 56, and the tapered distal end portion 24 is formed at one end of the cylindrical body 56. A yarn passage 29 is formed in the axial center portion of the hollow guide shaft body 20, and after passing the yarn through the yarn passage 29, the spun yarn 10 is discharged through an outlet hole (not shown) on the downstream side. ing.

  The cylindrical body 56 is formed with a large-diameter portion 58 having an enlarged diameter downstream from the distal end portion 24, and the large-diameter portion 58 is exposed to the air discharge space 55. The second block 92 includes a shaft body holding member 59, and is fixed to the shaft body holding member 59 in a state where the large diameter portion 58 is inserted.

  The shaft body holding member 59 is connected to a pneumatic cylinder 80. By driving the pneumatic cylinder 80, the second block 92 is moved away from the first block 91 as shown by an arrow in FIG. be able to. This is because when the spinning chamber 26 and the swirling flow generating chamber 25 are clogged with fibers or accumulated in the air discharge space 55 and cannot be removed by suction by the negative pressure source, the shaft body holding member 59 is used. Is easily separated from the nozzle casing 53 (that is, the second block 92 is separated from the first block 91), and the air discharge space 55, the swirl flow generating chamber 25, and the spinning chamber 26 are opened. This is so that it can be removed. The pneumatic cylinder 80 is controlled by the unit controller 32 and can be operated by an appropriate drive signal.

  A penetrating pressure detection hole 61 is formed in the nozzle casing 53. The pressure detection hole 61 is connected to a pressure sensor 63 via a tube 62. The pressure sensor 63 detects a pressure value inside the air discharge space 55 and the swirl flow generating chamber 25 communicating with the air discharge space 55. The pressure sensor 63 is configured to transmit a pressure detection value to the unit controller 32. The unit controller 32 detects the accumulation of fibers in the air discharge space 55 and the swirl flow generation chamber 25 by monitoring the detected value of the pressure (note that the accumulation of fibers will be described later). ).

  Further, the spinning machine 1 of the present embodiment includes an appropriate compressed air source 64, and the compressed air source 64 is connected to a cleaning line 66 through a compressed air tube 65. The cleaning line 66 is a line for cleaning the pneumatic spinning nozzle 19 by, for example, jetting compressed air around the guide hole 21. An electromagnetic valve 67 is installed in the compressed air tube 65, and its opening / closing control is performed by an operation signal from the unit controller 32. The cleaning line 66 and the tube 62 are connected through a joint 68 and a relay pipe 69. An orifice 70 is installed in the middle of the relay pipe 69.

  Next, the configuration of the pressure collective management apparatus of the present embodiment will be described with reference to the block diagram of FIG. As shown in FIG. 4, in the present embodiment, one unit controller 32 is provided for one spinning unit group 2 </ b> G composed of four spinning units 2. Each unit controller 32 mainly includes a reception unit 28, a calibration execution unit 30, an offset value storage unit 33, a threshold setting unit 35, a storage unit 36, and a pressure abnormality determination unit 37. Further, the machine control device 42 mainly includes the control panel 38. The unit controller 32 is configured to be able to send and receive information to and from the machine base control device 42. In FIG. 4, only one spinning unit group 2G and one unit controller 32 are shown. However, the actual spinning machine 1 includes a plurality of spinning unit groups 2G, and the unit controller 32 includes the spinning unit group 2G. The number corresponding to is provided. Each unit controller 32 is configured to be able to transmit and receive information to and from the machine control device 42.

  The receiving unit 28 can receive analog pressure value signals from the plurality of pressure sensors 63, and can A / D convert each pressure value signal and transmit it to the pressure abnormality determining unit 37 and the like.

  The calibration execution unit 30 calibrates the pressure sensor 63 included in each spinning unit 2 at an appropriate timing or according to an instruction input from the control panel 38 by the operator. The unit controller 32 includes an offset value storage unit 33 that stores the offset value determined at the time of the calibration. The offset value storage unit 33 is constituted by a RAM, for example. Details of the calibration and the offset value will be described later.

  The threshold setting unit 35 sets a threshold when the pressure abnormality determination unit 37 determines that the pressure value of the pressure sensor 63 is abnormal. The unit controller 32 also has a storage unit 36 for storing this threshold value. The storage unit 36 is constituted by a RAM, for example. The abnormal pressure determination and threshold setting will be described later.

  The control panel 38 includes the color liquid crystal monitor 48 as described above, and the unit controller 32 provides the color liquid crystal monitor 48 with, for example, the pressure value, average pressure value, offset value, threshold value, and abnormality notification of each pressure sensor 63. Can be displayed visually.

  In the present embodiment, as described above, the unit controller 32 and the machine control device 42 cooperate to manage the pressure sensor 63 (calibration, threshold setting, information display, etc.) of each spinning unit 2. It is configured. Accordingly, it can be said that the unit controller 32 and the machine base control device 42 function as a pressure collective management device of the spinning machine 1.

  Next, calibration of the pressure sensor 63 will be described. First, the operator operates the input unit 47 to designate the spinning unit 2 that executes calibration. At this time, the operator can specify all of the plurality of spinning units 2 or only a part of them. When designated by the operator, a predetermined signal is transmitted to the calibration execution unit 30. The calibration execution unit 30 executes the calibration of the pressure sensor 63 of the designated spinning unit 2 according to the signal.

  Specifically, the unit controller 32 operates the pneumatic cylinder 80 and retracts the second block 92 from the first block 91, so that, as shown in FIG. The spinning chamber 26 is opened. As a result, the pressure detection hole 61 is opened to atmospheric pressure, and the pressure sensor 63 detects the pressure value at atmospheric pressure. The pressure value signal at this time becomes the offset value of each pressure sensor 63.

  The receiving unit 28 receives a pressure value signal at atmospheric pressure from each pressure sensor 63, performs A / D conversion, and transmits the pressure value to the calibration execution unit 30. The calibration execution unit 30 stores the pressure value as an offset value of each pressure sensor 63 in a storage area corresponding to each pressure sensor 63 of the offset value storage unit 33.

  When the acquired offset value is far from the normally detected atmospheric pressure detection value, the calibration execution unit 30 determines that the pressure sensor 63 is abnormal (failure). The unit controller 32 notifies the operator of abnormality (failure) of the pressure sensor 63 by turning on the notification lamp 71 of the spinning unit 2 having the pressure sensor 63. Further, the calibration execution unit 30 sends a signal to the control panel 38 and displays a sensor abnormality notification on the color liquid crystal monitor 48. Thus, by using the pressure detection values when the air discharge space 55, the swirl flow generation chamber 25, and the spinning chamber 26 are opened for calibration of each pressure sensor 63, the state of other parts (for example, the negative pressure source) The abnormality of the pressure sensor 63 can be reliably detected without being affected by the failure.

  On the other hand, when the package 45 is doffed or when a yarn clearer (not shown) detects a yarn defect, the spinning unit 9 is temporarily stopped to perform a doffing operation or a yarn joining operation. Thus, since the spinning chamber 26 can be opened when the spinning unit 9 is stopped, the above-described calibration and abnormality detection are possible.

  Therefore, the calibration execution unit 30 according to the present embodiment performs the calibration of the pressure sensor 63 collectively according to an instruction from the operator, and also when the timing at which each spinning unit 2 can open the spinning chamber 26 has arrived. The calibration and abnormality detection of each pressure sensor 63 are automatically performed. Thus, by automatically executing the calibration at the respective timings of the spinning units 2, the pressure sensors 63 can always be kept in an appropriate state.

  The calibration work and operation check work of the pressure sensor 63 are thus completed, and then the unit controller 32 operates the pneumatic cylinder 80. As a result, the shaft body holding member 59 advances to the nozzle casing 53 side, and the spinning chamber 26, the swirl flow generating chamber 25, and the air discharge space 55 are closed again as shown in FIG.

  Next, the operation during spinning of the spinning machine 1 of the present embodiment will be described. First, at the start of spinning, the unit controller 32 opens the electromagnetic valve 67 for a predetermined time and supplies compressed air to the cleaning line 66 to clean the periphery of the guide hole 21 of the air spinning nozzle 19.

  At this time, the compressed air from the compressed air source 64 is supplied to the pressure detection hole 61 through the relay pipe 69 and is ejected from the pressure detection hole 61 to the air discharge space 55. As a result, even if fibers (details will be described later) are clogged in the pressure detection hole 61, it can be blown off from the pressure detection hole 61, and the pressure sensor 63 accurately measures the pressure at the opening of the pressure detection hole 61. It can be done. Note that the supply amount of the compressed air is adjusted by the orifice 70 so that the pressure in the pressure detection hole 61 does not greatly increase and falls outside the allowable measurement range of the pressure sensor 63.

  After that, spinning by the spinning unit 9 is started. During spinning, the fiber bundle 8 or the spun yarn 10 continues from the front roller 18 to the yarn feeding device 11 through the guide hole 21, the spinning chamber 26, and the yarn passage 29. Thus, the yarn feeding device 11 applies a feeding force to the downstream side, whereby tension is applied to the yarn.

  The fiber bundle 8 discharged from the front roller 18 of the draft device 7 enters the spinning chamber 26 through the guide hole 21 as shown in FIG. As a result, one end of the remaining short fibers is separated from the long fibers that are the core fibers of the fiber bundle 8 and opened, and the short fibers are swung in the swirling flow generating chamber 25 and twisted. Although this twist tends to propagate to the front roller 18 side, the propagation is blocked by the needle 22, so that the fiber bundle 8 sent out from the front roller 18 is not twisted by the twist. Thus, the needle 22 forms a twist propagation preventing means. The fibers twisted as described above are successively produced into actual twisted yarns, most of which are wound fibers, pass through the yarn passage 29, and are discharged from an outlet hole (not shown). The spun yarn 10 is wound around the winding device 12 via the yarn feeding device 11 shown in FIG.

  The fibers that have not been twisted into the spun yarn 10 due to, for example, breaking during the opening and twisting of the above short fibers are used for discharging air from the swirling flow generating chamber 25 by the swirling flow generated by the swirling flow generating nozzle 27. It is sent to the space 55 and discharged through the pipe 60 by suction of the negative pressure source.

  On the other hand, the fibers to be discharged via the pipe 60 as described above may form a loop around the large diameter portion 58 and be accumulated in the air discharge space 55 as indicated by reference numeral 90 in FIG. is there. The cause of this is, for example, that the fiber is caught by some member inside the air discharge space 55 and is not discharged even by the suction flow from the negative pressure source, and the other fibers are gradually entangled with each other as spinning is performed. It is conceivable that it grows to a loop-shaped fiber 90 that exceeds the outer peripheral length of the large-diameter portion 58 and circulates outside the large-diameter portion 58. Alternatively, in this embodiment, the shaft body holding member 59 is configured to be separated from the nozzle portion casing 53 for the convenience of maintenance work and calibration of the pressure sensor 63, but the shaft body holding member after the maintenance or calibration is completed. When attaching 59 at a predetermined position as shown in the drawing close to the nozzle casing 53, the fibers are caught in the joint portion, and the fibers are not discharged but entangled with other fibers to grow and become a loop-shaped fiber 90. It is possible to become.

  Thus, when the fibers 90 grow to some extent in the air discharge space 55 and become fluffy, the flow of air from the swirl flow generation chamber 25 to the air discharge space 55 is obstructed. Is disturbed and causes weak yarn. Further, when the short fibers opened at the time of spinning are swung in the swirling flow generating chamber 25, they come into contact with the fibers accumulated around the large diameter portion 58 and the twisting is hindered. It will cause thread.

  The pressure in the swirling flow generating chamber 25 and the air discharge space 55 is normally maintained at a moderate negative pressure by the suction flow from the negative pressure source, but the fibers 90 are accumulated around the hollow guide shaft body 20. When it comes, the suction flow is inhibited by the accumulated fibers 90, so that the pressure gradually increases and approaches atmospheric pressure. Therefore, in this embodiment, the pressure sensor 63 monitors the pressure of the opening portion of the pressure detection hole 61 (pressure of the air discharge space 55 communicating with the swirl flow generation chamber 25), thereby the above-described fiber 90. Has detected the accumulation of.

  Specifically, it is as follows. That is, during the spinning operation, the pressure abnormality determination unit 37 monitors the change in the detection value of each pressure sensor 63 received by the reception unit 28. When the detected value exceeds a preset threshold value, the pressure abnormality determination unit 37 determines that the weak yarn is likely to occur, and automatically transmits an operation stop signal to the spinning unit 2.

  As a result, the driving of the draft motor 31 and the supply of the fiber bundle 8 to the spinning unit 9 are immediately stopped, and the supply of compressed air to the pneumatic spinning nozzle 19 is stopped to stop the spinning operation. Then, the notification lamp 71 is turned on to notify the operator that the fibers 90 have accumulated in the air discharge space 55. Further, the pressure abnormality determination unit 37 sends a signal to the control panel 38 so that a fiber accumulation notification can be displayed on the color liquid crystal monitor 48.

  As a result, it is possible to quickly notify the operator that the fibers 90 have accumulated in the air discharge space 55, prompting the removal of the fibers 90 in the air discharge space 55, and making the spinning unit 2 ready for spinning. It can be recovered early.

  Further, although the pressure sensor 63 is configured to output a pressure value within a predetermined pressure detection range, in the present embodiment, only the narrow central portion of the pressure detection range is the portion of the pressure detection hole 61. The pressure sensor 63 that can sufficiently measure the pressure fluctuation is used. Therefore, when the detection value of the pressure sensor 63 indicates the lower limit value or the upper limit value in the pressure detection range, it means that the pressure sensor 63 itself is out of order. Using this, the pressure abnormality determination unit 37 of the present embodiment monitors whether the detection value of the pressure sensor 63 is the lower limit value or the upper limit value of the pressure detection range, thereby detecting the abnormality of the pressure sensor 63. Judging the presence or absence of. When the pressure abnormality determination unit 37 detects a failure of the pressure sensor 63, the unit controller 32 notifies the operator by the notification lamp 71. Further, the pressure abnormality determination unit 37 sends a signal to the control panel 38 to display a sensor failure notification on the color liquid crystal monitor 48.

  As described above, the control panel (information display unit) 38 of the machine base control device 42 displays the information regarding the fiber accumulation status of each spinning unit 2 and the failure of the pressure sensor 63 in a lump or individually. Is possible. In particular, by displaying various pieces of information of the plurality of spinning units 2 at a time, the operator can easily grasp the status of the entire apparatus, and can perform maintenance and management accurately.

  Next, the setting of the threshold will be described. As a method for setting the threshold value, for example, a predetermined value can be uniformly set for all the spinning units 2. However, since there is an individual difference between each pressure sensor 63 and the spinning unit 9, it is advantageous in terms of determination accuracy to vary the threshold values that should be determined as abnormal.

  Therefore, the threshold value setting unit 35 of the present embodiment can set the threshold value individually for each spinning unit 2. Further, the threshold setting unit 35 of the present embodiment can set the threshold by any one of the first threshold setting method and the second threshold setting method described below.

  First, the first threshold setting method will be described. This method is a method of setting a threshold value based on the pressure value of each spinning unit 2 during idling. Here, the idle operation means that the draft device 7 is stopped and the supply of the fiber bundle 8 is stopped, and the supply of compressed air from the compressed air source to the swirl flow generating nozzle 27 is stopped, and the spinning unit 9 performs spinning. It means the state that is not done. Even during this idling operation, suction by the negative pressure source connected to the pipe 60 is performed, and therefore the inside of the swirling flow generation chamber 25 is kept at a negative pressure.

  FIG. 7 shows a graph measured for a spinning machine having 80 spinning units as an example of the pressure value of each spinning unit 2 during idling. As shown in FIG. 1, the spinning units 2 are arranged in a horizontal row between the prime mover box 5 and the blower box 4, and each spinning unit 2 is referred to as 1, 2,... From the prime mover box 5 side. The numbers assigned in this way are the spinning unit numbers on the horizontal axis in FIG. As shown in FIG. 7, during the idling operation, the pressure value of the pressure sensor 63 of each spinning unit 2 shows a certain tendency that the pressure value increases as the distance from the blower box 4 increases (the number decreases). This is because the negative pressure source is disposed in the blower box 4 and a pressure loss having a magnitude corresponding to the distance from the blower box 4 occurs.

  As described above, since the pressure values of the spinning units 2 during the idling operation are different from each other, accurate weak yarn detection and abnormal pressure detection can be performed by setting the threshold value in consideration of this difference. For example, a value obtained by multiplying the pressure value of each spinning unit 2 during idling by a predetermined coefficient (for example, 0.5), or a certain amount of the pressure value (a value that takes into account pressure fluctuation during spinning, for example, +1. 0 kPa) The offset value is set as the threshold value of each spinning unit 2.

  By the way, as shown in the graph of FIG. 7, there is a certain tendency in the pressure value during the idle operation between the spinning units 2. Therefore, for example, if all the spinning units 2 are idly operated when the apparatus is installed, and a value corresponding to the inclination of the graph of FIG. 7 is stored in the pressure value storage unit 73 included in the machine base control device 42, one spinning Based on the pressure value during the idle operation of the unit 2, the pressure value during the idle operation of the other spinning unit 2 can be calculated.

  Therefore, in the spinning machine 1 of the present embodiment, when setting a threshold value for each spinning unit 2, instead of detecting all of the spinning units 2 idly and detecting pressure values, the 80th closest to the negative pressure source is set. Only the pressure value of the number spinning unit 2 is detected. The spinning unit 2 for detecting the pressure value can be selected arbitrarily. For example, the pressure value when the spinning unit 2 (the first spinning unit 2) farthest from the negative pressure source is idled. May be detected and stored.

  In order to set the threshold value for each spinning unit by the first threshold value setting method, specifically, the following is performed. First, for example, the operator measures the pressure value during idling of the 80th spinning unit 2, and multiplies the pressure value by a coefficient or offsets a certain amount to obtain a value obtained by multiplying the pressure value by the 80th spinning unit. A threshold value of 2 is input to the control panel 38 of the machine base control device 42.

  The machine control device 42 sets the abnormality determination correction value based on the threshold value input by the operator and the inclination of the graph of the pressure value at the time of idle operation of each spinning unit 2 set in advance to the unit controller 32. To the threshold setting unit 35. The threshold setting unit 35 newly calculates a threshold for each spinning unit 2 based on the received threshold and the abnormality determination correction value, and stores the calculated threshold in the storage unit 36.

  As a result, the threshold value is set in consideration of the pressure tendency between the respective spinning units 2, so that a more reliable threshold value can be set as compared with the case where the same threshold value is set for all the spinning units 2. it can. Further, since the pressure value at the time of idling is used as a reference, it is difficult to be influenced by noise, and a stable value can be set as the threshold value every time.

  Instead of the method of setting the threshold value of the 80th spinning unit 2 by the operator as described above, the threshold value of each spinning unit 2 may be calculated as follows, for example. That is, first, based on the pressure value during idling of the 80th spinning unit 2 and the slope of the graph, the pressure value during idling of each spinning unit 2 is calculated. Then, the threshold value of each spinning unit 2 is calculated by multiplying each calculated value of each spinning unit 2 by a coefficient or offset by a certain amount. Also by this method, the threshold value can be set in consideration of the pressure tendency between the spinning units 2 as in the above case.

  Next, a second threshold setting method will be described. This method is a method in which a value obtained by multiplying a pressure value at the time of spinning of each of the pneumatic spinning units 2 by a predetermined coefficient is set as the threshold value of the pneumatic spinning unit 2.

  FIG. 8 is a graph plotting the pressure value of each spinning unit 2 during operation of the spinning machine having 24 spinning units 2. As shown in FIG. 8, when the apparatus is in operation, there is no clear tendency as in the idling operation. This is considered to be because not only the distance from the negative pressure source but also the individual differences of the spinning section 9 such as the difference in the direction of the swirl flow generating nozzle 27 greatly affect. By setting the threshold value in consideration of the individual difference of each spinning unit 2 that appears when the apparatus is operating, more accurate abnormality determination is possible.

  However, when the threshold value is determined based on the pressure value during operation of the apparatus as described above, the normal state (specifically, the state in which the fibers 90 are not accumulated and the pressure sensor 63 is not broken) The appropriate threshold value cannot be determined based on the pressure of). Further, since there is no constant tendency between the spinning units 2 as in the idling operation, it is necessary to determine the threshold value after detecting the pressure value for each spinning unit 2.

  Therefore, the threshold setting unit 35 of the present embodiment detects the pressure value of each spinning unit 2 at a predetermined timing such as the start of spinning, for example, and multiplies the value by a predetermined coefficient (for example, 0.5 to 0.6). , And stored in a storage area corresponding to each spinning unit 2 of the storage unit 36.

  Accordingly, a suitable threshold value can be set for each spinning unit 2 by a simple process of multiplying a constant coefficient while eliminating individual differences between the pressure sensor 63 and the spinning unit 9. Further, if the coefficient is common to all spinning units, collective management becomes easier. Thereby, it is possible to prevent defective yarn detection and erroneous detection that are easy to manage with high accuracy.

  In addition, the threshold setting unit 35 of the present embodiment is configured to be able to switch between a first threshold setting method and a second threshold setting method according to an operator instruction. Specifically, the operator causes the color liquid crystal monitor 48 of the control panel 38 to display a threshold setting method switching setting screen. Then, by appropriately operating the input unit 47, the threshold setting method is switched with respect to the threshold setting unit 35. Thereby, any suitable one can be selected according to the type of spun yarn, the operating condition of the apparatus, and the like.

  As described above, the spinning machine 1 of the present embodiment includes the plurality of spinning units 2, and the machine base control device 42 and the unit controller 32 as a pressure collective management device. Each of the pneumatic spinning units includes a swirling flow generation chamber 25 that generates a swirling air flow inside and twists the fiber, and a pressure sensor 63 that detects the pressure inside the swirling flow generation chamber 25. The unit controller 32 includes a receiving unit 28 and a pressure abnormality determining unit 37. The receiving unit 28 can receive the pressure value signal from each pressure sensor 63. The pressure abnormality determination unit 37 determines whether or not there is an abnormality in the pressure of each spinning unit 2 by comparing the pressure value with a predetermined threshold value.

  With this configuration, the occurrence of pressure abnormality in the plurality of spinning units 2 can be detected in a lump, so that the management of each spinning unit 2 is easy. In addition, since it is not necessary to individually provide an abnormality determination configuration for each spinning unit 2, the configuration of the apparatus is simplified and the cost can be reduced.

  Further, the unit controller 32 of the present embodiment determines the threshold value based on the pressure value detected by the storage unit 36 capable of storing the threshold value for each spinning unit 2 and the pressure sensor 63, and stores the threshold value. A threshold setting unit 35 to be stored in the unit 36.

  With this configuration, it is possible to set an appropriate threshold according to the individual difference between each spinning unit 2 and the pressure sensor 63, so that accurate abnormality detection can be performed. Further, the setting of the threshold value and the storage of the threshold value are collectively performed in cooperation with the unit controller 32 and the machine base control device 42, so that the management of each spinning unit 2 is easier.

  Further, the threshold value setting unit 35 of the present embodiment can set the threshold value of each spinning unit 2 by using a pressure value when at least one spinning unit 2 is idling (first operation). Threshold setting method).

  With this configuration, a threshold value can be set taking into account the tendency of pressure between the spinning units 2, so that a more suitable threshold value is set for the spinning unit 2 than when a uniform threshold value is used for all spinning units 2. can do.

  Further, the threshold value setting unit 35 of the present embodiment can set, as the threshold value of the spinning unit 2, a value obtained by multiplying a spinning pressure value at a predetermined time of each spinning unit 2 by a predetermined coefficient ( Second threshold setting method).

  With this configuration, it is possible to set a more suitable threshold value for each spinning unit 2 in consideration of variations due to individual differences between the spinning units 2 while realizing unified management. As a result, it is possible to detect defective yarn with higher accuracy and prevent erroneous detection.

  Further, the threshold setting unit 35 of the present embodiment can switch between a mode in which a threshold is set by the first threshold setting method and a mode in which a threshold is set by the second threshold setting method.

  With this configuration, the threshold setting method can be appropriately changed by the operator, so that an optimum threshold can be set according to the situation. As a result, it is possible to detect defective yarn with higher accuracy and prevent erroneous detection.

  Further, the unit controller 32 of the present embodiment includes a calibration execution unit 30 that can calibrate the pressure sensors 63 of the plurality of spinning units 2.

  With this configuration, the pressure sensors 63 of the plurality of spinning units 2 can be calibrated together. It is also possible to individually calibrate the pressure sensor 63 of each spinning unit 2 at an appropriate timing. Therefore, management of each spinning unit 2 becomes easier, and the accuracy of the pressure detection value can always be kept constant.

  In addition, the spinning machine 1 of the present embodiment includes a control panel (information display unit) 38 that can display information related to the pressure sensor 63 or a detected value thereof.

  With this configuration, it becomes easy to display information related to the pressures of the plurality of spinning units 2 collectively or in an aggregated manner, so that the operator can easily grasp the overall situation of the spinning machine 1.

  Although the preferred embodiment of the present invention has been described above, the above configuration can be changed as follows, for example.

  The offset value of the pressure sensor 63 may be a single detected value, but when the swirl flow generating chamber 25 is opened, the receiving unit 28 samples the pressure value of the pressure sensor 63 a predetermined number of times to perform calibration. The execution unit 30 may calculate an average value of the pressure values and store the average value as an offset value. In this case, since a highly reliable value can be used by using the average value, more accurate calibration becomes possible. It should be noted that an arbitrary numerical value can be appropriately set for the sampling period and the number of times when the operator operates the input unit 47.

  In the first threshold value setting method, the pressure value during idling is sampled a plurality of times, the threshold value setting unit 35 obtains the average value, and the threshold value is set based on this average value. it can. Thereby, an appropriate threshold value can be set without being influenced by noise during measurement. In the second threshold value setting method, the same effect can be obtained by setting the threshold value based on the average value of the pressure values during operation of the apparatus. Since the fluctuation of the pressure value is larger during operation of the apparatus than during idle operation, it is particularly preferable to use an average value for the second threshold setting method.

  The pressure abnormality determination unit 37 may use an average value of pressure values for a predetermined number of times of sampling (for example, a moving average value) as the pressure value of each spinning unit 2 to be compared with the threshold value. This makes it possible to accurately determine an abnormality without being affected by noise.

  The method of displaying information by the control panel 38 is not limited to a color liquid crystal monitor, and can be displayed by an appropriate means such as a monochrome liquid crystal or an LED display.

  Instead of the configuration in which the threshold value is automatically set by the threshold value setting unit 35, the operator can change the configuration so that the threshold value can be individually specified for each spinning unit 2. In this case, for example, the operator causes the color liquid crystal monitor 48 of the control panel 38 to display a threshold setting method switching setting screen. Then, a desired threshold value is stored in a predetermined storage area of the storage unit 36 by appropriately operating the input unit 47 and inputting a numerical value. As a result, for example, only a specific spinning unit 2 can be operated under different conditions.

  Further, the machine base control device 42 can be changed to a configuration realized by a PC and software externally connected to the spinning machine 1, for example, instead of the configuration provided in the prime mover box 5.

  The control panel 38 can be changed to be used for browsing and setting various information related to the spinning machine 1 in addition to the above. For example, it is possible to have a configuration in which information such as yarn quality information of each spinning unit 2, past pressure value history, and sampling period of the pressure sensor 63 can be accessed. In this configuration, for example, when the operator confirms the history information, the fibers 90 are likely to be accumulated in the specific spinning unit 2, so that the maintenance of the specific spinning unit 2 is easily required. Can be recognized.

  The position of the pressure detection hole 61 is arbitrary as long as it opens to the wall surface of the swirl flow generation chamber 25 or the air discharge space 55. For example, the pressure detection hole 61 can be provided in the shaft body holding member 59.

  As a condition for determining that fibers have accumulated in the air discharge space 55 (in other words, a condition for determining the pressure increase in the air discharge space 55), the detection value by the pressure sensor 63 exceeds the threshold value even for a moment. The determination condition may be set, or the determination time may be that the time exceeding the threshold exceeds a predetermined time, and various methods are conceivable.

  The disposition position of the notification lamp 71 and the manner of turning off and turning on are arbitrary, and control may be performed such that the notification lamp 71 is turned on during normal times and turned off when it is determined that fibers have accumulated in the air discharge space 55. In addition to the notification lamp 71, various modes such as a buzzer are conceivable as the notification means. In short, any device that can notify the operator of five senses such as visual sense and auditory sense can be used.

  The pressure sensor 63 and the pressure detection hole 61 are not limited to the spinning unit 9 using the hollow guide shaft body 20, and can be applied to spinning units having other configurations.

  The configuration for separating and contacting the first block 91 and the second block 92 can be changed to be performed by, for example, a combination of a cam and an electric motor or a solenoid instead of the pneumatic cylinder 80.

  Any suitable formula can be used as the calculation formula for the average value of the pressure measurement values. For example, it can be calculated using a simple moving average, a weighted moving average, an exponential weighted moving average, or the like.

  The pneumatic cylinder 80 is provided so as to separate and contact the second block 92 with respect to the first block 91. However, the pneumatic cylinder 80 is provided on the first block 91 side, and the first block 91 is provided as the second block 92. You may comprise so that it may space apart and contact.

  Further, noise may be removed by attaching a mechanical damper or the like to the tube 62 between the joint 68 and the pressure sensor 63 or between the pressure detection hole 61 and the joint 68.

  In the above embodiment, one spinning unit group 2G is composed of four spinning units 2. However, the number of spinning units 2 provided in each spinning unit group 2G may be one, or any other arbitrary number. Multiple units may be used.

  In the above embodiment, the pressure collective management device is a machine controller that mainly includes the calibration controller 30, the threshold setting unit 35, and the pressure abnormality determination unit 37, and the control panel 38. 42. That is, in the pressure collective management device, the functions are shared so that the unit controller 32 has a control function and the machine control device 42 has a monitor function and a setting function. However, as a configuration of the pressure collective management device, for example, the machine control device 42 may include the configuration of the unit controller 32 of the above embodiment without sharing the function.

The front view of the spinning machine which concerns on one Embodiment of this invention. Similarly vertical side view. The longitudinal front view of a spinning part. The apparatus block diagram of a pressure collective management apparatus. The longitudinal front view at the time of opening of a spinning part. The figure which shows the mode of the spinning part at the time of spinning. The graph which shows the pressure value when each spinning unit of the spinning device which concerns on one Embodiment of this invention is performing idling. The graph which shows the pressure value when each spinning unit of the spinning apparatus which concerns on another embodiment of this invention is spinning.

Explanation of symbols

2 Spinning unit 28 Receiving unit 30 Calibration execution unit 32 Unit controller 33 Offset value storage unit 35 Threshold setting unit 36 Storage unit 37 Pressure abnormality determination unit 38 Control panel (information display unit)
42 pressure management device 63 pressure sensor

Claims (7)

A plurality of pneumatic spinning units and a pressure collective management device;
Each of the pneumatic spinning units is
A hollow chamber that generates a swirling air flow inside and twists the fiber;
A pressure sensor for detecting the pressure in the hollow chamber;
With
The pressure collective management device is:
A pressure detection value receiving unit capable of receiving a pressure value signal from each of the pressure sensors;
A pressure abnormality determination unit that determines the presence or absence of an abnormality in the pressure of each pneumatic spinning unit by comparing the pressure value with a predetermined threshold;
A spinning apparatus comprising: The spinning device according to claim 1,
The pressure collective management device is:
A storage unit capable of storing the threshold value for each of the pneumatic spinning units;
A threshold value setting unit that determines the threshold value based on a pressure value detected by the pressure sensor, and stores the threshold value in the storage unit;
A spinning apparatus comprising: The spinning device according to claim 2,
The spinning device according to claim 1, wherein the threshold value setting unit sets the threshold value of each pneumatic spinning unit by using a pressure value when at least one pneumatic spinning unit is idling. The spinning device according to claim 2,
The threshold value setting unit sets, as the threshold value of the pneumatic spinning unit, a value obtained by multiplying a pressure value at the time of spinning of each pneumatic spinning unit at a predetermined time by a predetermined coefficient. . The spinning device according to claim 2,
The threshold setting unit includes:
A first mode in which the threshold value of each pneumatic spinning unit is set using a pressure value when at least one of the pneumatic spinning units is idling;
A second mode in which a value obtained by multiplying a pressure value at the time of spinning of each of the pneumatic spinning units by a predetermined coefficient is set as the threshold value of the pneumatic spinning unit;
Can be switched. The spinning device according to any one of claims 1 to 5,
The pressure collective management apparatus includes a calibration execution unit capable of calibrating each of the pressure sensors. The spinning device according to any one of claims 1 to 6,
A spinning apparatus comprising an information display unit capable of displaying information related to the pressure sensor or a detected value thereof.

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