JP2017071882A - Spinning machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spinning machine which can improve yarn quality.SOLUTION: A spinning machine 1 comprises: a yarn formation unit forming yarn Y from spinning materials while regulating the tensile force of the spinning materials; a winding device 13 winding up the yarn Y formed in the yarn formation unit; a tensile force detecting element 10 detecting the tensile force of the yarn Y in upstream of the winding device 13 in a running direction of the yarn Y; and a control unit 15 controlling the yarn formation unit and the winding device 13 to wind the yarn Y while adjusting the tensile force given by the yarn formation unit on the basis of the detection results of the tensile force detecting element 10.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a spinning machine.

  As a conventional spinning machine, for example, the one disclosed in Patent Document 1 is known. The spinning machine described in Patent Document 1 includes a spinning device that generates a yarn, a winding device that winds the yarn generated by the spinning device into a package, and a yarn that travels between the spinning device and the winding device. And a detector for detecting tension.

JP 2013-049932 A

  Yarn quality also depends on the tension of the running yarn. By properly maintaining the tension of the yarn wound around the package by the winding device, the yarn quality can be improved.

  An object of the present invention is to provide a spinning machine capable of improving yarn quality.

  The spinning machine according to the present invention includes a yarn forming unit that forms a yarn from the spinning material while adjusting the tension of the spinning material, a winding device that winds the yarn formed by the yarn forming unit, and a traveling direction of the yarn A tension detection unit that detects the tension of the yarn on the upstream side of the winding device, and a yarn that is wound while adjusting the tension applied by the yarn forming unit based on the detection result of the tension detection unit. A control unit that controls the forming unit and the winding device.

  By performing feedback control of the device based on the yarn tension detected by the tension detector, the yarn tension can be maintained within a predetermined range. Therefore, the spinning machine can improve the yarn quality.

  In one embodiment, the yarn forming portion includes a support portion that supports the core yarn package around which the core yarn is wound, and a tension applying portion that applies tension to the core yarn unwound from the core yarn package. A core yarn supplying device may be provided, the control unit may control the operation of the yarn forming unit based on the detection result of the tension detecting unit, and the winding device may wind up the yarn containing the core yarn. Thereby, the yarn including the core yarn can be wound while being formed in a high quality state.

  In one embodiment, the control unit may control the tension applying unit based on the detection result of the tension detecting unit so that the yarn tension detected by the tension detecting unit is within a predetermined range. Thereby, the yarn quality of the yarn wound by the winding device can be improved.

  In one embodiment, the yarn forming section includes a draft device that drafts a fiber bundle that is a spinning material, and the draft device includes a plurality of rollers including a pair of front rollers disposed on the most downstream side in the draft direction of the fiber bundle. The controller may have a pair, and the controller may control the peripheral speed of the front roller pair based on the detection result of the tension detector. The feed ratio of the fiber bundle changes due to the change in the peripheral speed of the front roller pair of the draft device. Thereby, the tension of the fiber bundle (yarn) on the downstream side of the front roller pair can be changed. Therefore, in the spinning machine, the tension of the yarn can be effectively controlled by controlling the peripheral speed of the pair of front rollers based on the detection result of the tension detector.

  In one embodiment, when the tension of the yarn is lower than a predetermined range in the detection result, the control unit decreases the current peripheral speed of the front roller pair until the tension of the yarn falls within the predetermined range. When the yarn tension is higher than a predetermined range in the detection result, the current peripheral speed of the front roller pair may be increased until the yarn tension falls within the predetermined range. When the peripheral speed of the front roller pair is increased, the tension of the yarn can be lowered, and when the peripheral speed of the front roller pair is decreased, the tension of the thread can be increased. Therefore, the tension of the yarn can be maintained within a predetermined range by controlling the peripheral speed of the pair of front rollers based on the detection result.

  In one embodiment, the yarn forming unit is disposed on the upstream side of the winding device in the traveling direction of the yarn, includes a yarn storage roller that stores the yarn, and the control unit detects the tension of the yarn detected by the tension detection unit. The rotational speed per unit time of the yarn accumulating roller may be controlled based on the detection result of the tension detecting unit so that is within a predetermined range. The feed ratio of the yarn changes due to the change in the number of rotations per unit time of the yarn accumulating roller. Thereby, the tension of the yarn stored in the yarn storage roller can be changed. Therefore, in the spinning machine, the tension of the yarn can be effectively controlled by controlling the number of rotations of the yarn accumulating roller based on the detection result of the tension detecting unit.

  In one embodiment, when the tension of the yarn is lower than a predetermined range in the detection result, the control unit controls to increase the current rotation speed of the yarn accumulating roller until the yarn tension falls within the predetermined range. However, when the yarn tension is higher than the predetermined range in the detection result, the current rotational speed of the yarn accumulating roller may be controlled to decrease until the yarn tension falls within the predetermined range. Increasing the rotation speed of the yarn storage roller can increase the tension of the yarn, and decreasing the rotation speed of the yarn storage roller can decrease the tension of the yarn. Therefore, the control unit controls the rotation speed of the yarn accumulating roller based on the detection result, so that the yarn tension can be maintained within a predetermined range.

  In one embodiment, the spinning machine includes an air spinning device that generates a yarn by causing a swirling air flow to act on the fiber bundle, and the yarn storage roller stores the yarn generated by the air spinning device while drawing out the yarn. Good. Thereby, the tension of the yarn generated in the pneumatic spinning device can be controlled by the yarn accumulating roller. Therefore, since the yarn is generated with the optimum tension in the pneumatic spinning device, the yarn quality can be improved.

  According to the present invention, the yarn quality can be improved.

It is a front view which shows the spinning machine which concerns on one Embodiment. It is a side view of the spinning unit of the spinning machine of FIG. It is a block diagram which shows the structure of a part of spinning unit. It is a perspective view of the core yarn supply apparatus in the spinning unit shown in FIG. It is a side view of the tension | tensile_strength provision mechanism in the core yarn supply apparatus shown in FIG. It is a block diagram which shows the structure of a part of spinning unit of the spinning machine which concerns on other embodiment.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or equivalent elements will be denoted by the same reference numerals, and redundant description will be omitted.

  As shown in FIG. 1, the spinning machine 1 includes a plurality of spinning units 2, a yarn splicing cart 3, a doffing cart (not shown), a first end frame 4, and a second end frame 5. I have. The plurality of spinning units 2 are arranged in a line. Each spinning unit 2 generates the yarn Y and winds it on the package P. When the yarn Y is cut by a certain spinning unit 2 or the yarn Y is cut for some reason, the yarn joining cart 3 performs a yarn joining operation with the spinning unit 2. The doffing cart doffs the package P and supplies a new bobbin B to the spinning unit 2 when the package P is full in a spinning unit 2.

  The first end frame 4 accommodates a collection device for collecting fiber waste and yarn waste generated in the spinning unit 2. The second end frame 5 is configured to adjust the air pressure of the compressed air (air) supplied to the spinning machine 1 to supply air to each part of the spinning machine 1 and to supply power to each part of the spinning unit 2. A drive motor or the like is stored. The second end frame 5 is provided with a machine control device 100, a display screen 102, and input keys 104. The machine control device 100 centrally manages and controls each part of the spinning machine 1. The display screen 102 can display information related to the setting contents and / or status of the spinning unit 2. When the operator performs an appropriate operation using the input keys 104, the setting operation of the spinning unit 2 can be performed.

  As shown in FIGS. 1 and 2, each spinning unit 2 includes a draft device 6, a core yarn supply device 7, an air spinning device 8, a yarn monitoring device 9, in order from the upstream side in the traveling direction of the yarn Y. , A tension sensor (tension detection unit) 10, a yarn accumulating device 11, a waxing device 12, and a winding device 13. In the present embodiment, the yarn storage roller 11a (described later) of the draft device 6, the core yarn supply device 7, and the yarn storage device 11 includes a yarn forming unit that forms the yarn Y from the spinning material while adjusting the tension of the spinning material. It is composed. A unit controller (control unit) 15 is provided for each predetermined number of spinning units 2 and controls the operation of the spinning units 2. In the spinning unit 2, the draft device 6, the core yarn supply device 7, and the yarn storage device 11 are devices that act on the tension of the yarn Y.

  The draft device 6 drafts a sliver (fiber bundle, spinning material) S. The draft device 6 includes a back roller pair 16, a third roller pair 17, a middle roller pair 18, and a front roller pair 19 in order from the upstream side in the traveling direction of the sliver S. The front roller pair 19 is disposed on the most downstream side in the draft direction. Each roller pair 16, 17, 18 and 19 has a bottom roller and a top roller. The bottom roller is rotationally driven by a drive motor provided on the second end frame 5. An apron belt 18 a is provided for the top roller of the middle roller pair 18. An apron belt 18 b is provided for the bottom roller of the middle roller pair 18.

  The core yarn supply device 7 unwinds the core yarn (spun material) C from the core yarn package CP and supplies the core yarn C to the draft device 6. Specifically, the core yarn supply device 7 supplies the core yarn C on the travel path of the fiber bundle F from between the middle roller pair 18 and the front roller pair 19. Thereby, the core yarn C is supplied to the pneumatic spinning device 8 together with the fiber bundle F.

  The pneumatic spinning device 8 generates a yarn Y by twisting the fiber bundle F drafted by the draft device 6 by a swirling air flow. More specifically (however, illustration is omitted), the pneumatic spinning device 8 includes a spinning chamber, a fiber guide portion, a swirling air flow generating nozzle, and a hollow guide shaft body. The fiber guide unit guides the fiber bundle F supplied from the upstream draft device 6 into the spinning chamber. The swirling airflow generation nozzle is disposed around the path along which the fiber bundle F travels. When air is injected from the swirling air flow generating nozzle, a swirling air flow is generated in the spinning chamber. By this swirling air flow, the fiber ends of the plurality of fibers constituting the fiber bundle F are reversed and swirled. The hollow guide shaft body guides the yarn Y from the spinning chamber to the outside of the pneumatic spinning device 8.

  The yarn monitoring device 9 monitors the information on the traveling yarn Y between the pneumatic spinning device 8 and the yarn storage device 11, and detects the presence or absence of a yarn defect based on the monitored information. When the yarn monitoring device 9 detects a yarn defect, the yarn monitoring device 9 transmits a yarn defect detection signal to the unit controller 15. The yarn monitoring device 9 detects, for example, an abnormal thickness of the yarn Y and / or foreign matter contained in the yarn Y as the yarn defect. The yarn monitoring device 9 also detects yarn breakage and the like.

  The tension sensor 10 measures the tension of the traveling yarn Y between the pneumatic spinning device 8 and the yarn storage device 11 and transmits a tension measurement signal (detection result) to the unit controller 15. When the unit controller 15 determines that there is an abnormality based on the detection result of the yarn monitoring device 9 and / or the tension sensor 10, the yarn Y is cut in the spinning unit 2. Specifically, the supply of air to the pneumatic spinning device 8 is stopped and the generation of the yarn Y is interrupted, whereby the yarn Y is cut. Alternatively, the yarn Y may be cut by a cutter provided separately.

  The waxing device 12 applies wax to the yarn Y between the yarn storage device 11 and the winding device 13.

  The yarn accumulating device 11 takes the slack of the yarn Y between the pneumatic spinning device 8 and the winding device 13. The yarn storage device 11 has a function of stably pulling out the yarn Y from the pneumatic spinning device 8, and the yarn Y sent out from the pneumatic spinning device 8 is retained during the yarn joining operation by the yarn joining cart 3, and the yarn Y is slackened. And a function of preventing the fluctuation in the tension of the yarn Y on the downstream side of the yarn accumulating device 11 from being transmitted to the pneumatic spinning device 8.

  The yarn storage device 11 includes a yarn storage roller 11a, a yarn hooking member 11b, and a motor 11c. When the yarn Y is wound around the outer peripheral surface of the yarn storage roller 11a, the yarn storage roller 11a stores the yarn Y. The yarn hooking member 11b is provided at the downstream end of the yarn accumulating roller 11a. The yarn hooking member 11b hooks the yarn Y at the start of storage of the yarn Y and winds it around the yarn storage roller 11a. During winding of the package P, the yarn hooking member 11b applies tension to the yarn Y unwound from the yarn accumulating roller 11a. The motor 11c rotates the yarn accumulating roller 11a. As shown in FIG. 3, the motor 11c is controlled by a motor driver 11d. The motor driver 11d controls driving of the motor 11c based on a signal output from the unit controller 15.

  The winding device 13 forms the package P by winding the yarn Y around the bobbin B. The winding device 13 includes a cradle arm 21, a winding drum 22, and a traverse guide 23. The cradle arm 21 supports the bobbin B so as to be rotatable. The cradle arm 21 is swingably supported by a support shaft 24 and brings the surface of the bobbin B or the surface of the package P into contact with the surface of the winding drum 22 with an appropriate pressure. A drive motor (not shown) provided on the second end frame 5 drives the winding drums 22 of the plurality of spinning units 2 all at once. Thereby, in each spinning unit 2, the bobbin B or the package P is rotated in the winding direction. The traverse guide 23 of each spinning unit 2 is provided on a shaft 25 shared by a plurality of spinning units 2. When the drive motor of the second end frame 5 reciprocates the shaft 25 in the direction of the rotation axis of the winding drum 22, the traverse guide 23 traverses the yarn Y with a predetermined width with respect to the rotating bobbin B or package P.

  When the yarn Y is cut in a certain spinning unit 2 or the yarn Y is cut for some reason, the yarn joining cart 3 travels to the spinning unit 2 and performs a yarn joining operation. The yarn joining cart 3 has a yarn joining device 26, a suction pipe 27, and a suction mouth 28. The suction pipe 27 is rotatably supported by the support shaft 31, captures the yarn Y from the pneumatic spinning device 8, and guides it to the yarn joining device 26. The suction mouse 28 is rotatably supported by the support shaft 32, captures the yarn Y from the winding device 13, and guides it to the yarn joining device 26. The yarn joining device 26 performs yarn joining between the guided yarns Y. The yarn joining device 26 is a splicer that uses compressed air or a knotter that mechanically joins the yarn Y.

  When the yarn joining cart 3 performs the yarn joining operation, the package P is rotated (reversely rotated) in the anti-winding direction. At this time, the cradle arm 21 is moved by an air cylinder (not shown) so that the package P is separated from the winding drum 22, and the package P is moved by a reverse rotation roller (not shown) provided on the yarn splicing carriage 3. It is rotated backward.

  Next, the core yarn supply device 7 will be described in detail. As shown in FIG. 2, the core yarn supply device 7 includes a package support portion (support portion) 50, a core yarn supply unit 51, and a core yarn guide portion 52.

  The package support unit 50 supports the core yarn package CP in a state where the center line of the core yarn package CP extends horizontally and in the front-rear direction. The core yarn package CP is formed by winding the core yarn C around the core yarn bobbin CB. In this embodiment, the core yarn C is, for example, a multifilament yarn. A multifilament yarn is a yarn formed by bundling a plurality of filament single yarns. The core yarn C is unwound from the core yarn package CP and supplied to the core yarn supply unit 51 via a guide roller 53 that guides the core yarn C. The core yarn C may be other types of yarn such as monofilament yarn and spun yarn.

  The core yarn supply unit 51 has a function of applying tension to the supplied core yarn C, a function of applying slackness to the core yarn C, and a function of sending out the core yarn C (the yarn end of the core yarn C). Have. The core yarn guide 52 is a cylindrical member that guides the core yarn C to the draft device 6.

  As shown in FIG. 4, the core yarn supply unit 51 includes a unit base 60, a tension applying mechanism 70, a slack applying mechanism 80, a core yarn monitoring device 82, and a core yarn sending mechanism 84. . In the following description, in the traveling path of the core yarn C in the core yarn supply unit 51, the core yarn package CP side is referred to as an upstream side, and the core yarn guide portion 52 side is referred to as a downstream side.

  The unit base 60 supports a tension applying mechanism 70, a slack applying mechanism 80, a core yarn monitoring device 82, and a core yarn sending mechanism 84 in order from the upstream side in the supply direction of the core yarn C. A core yarn guide 61 for guiding the core yarn C is provided on the most upstream side of the unit base 60.

  The tension applying mechanism 70 applies tension to the core yarn C on the downstream side of the core yarn guide 61. As shown in FIG. 5, the tension applying mechanism 70 includes a tension applying unit 71 and a holding unit 72.

  The tension applying unit 71 includes a fixed piece 73 and a movable piece 74. By alternately applying the core yarn C to the fixed pieces 73 and the movable pieces 74, the core yarn C is bent a plurality of times in the tension applying portion 71. The number of times the core yarn C is bent is, for example, 20 times or less (preferably 2 times or more and 10 times or less).

  The fixed piece 73 is fixed to the unit base 60. The movable piece 74 is supported by a support shaft (not shown) provided on the fixed piece 73 and can be opened and closed (rotated) with respect to the fixed piece 73. The movable piece 74 is urged in the opening direction with respect to the fixed piece 73 by a spring (not shown) provided on the fixed piece 73.

  The fixed piece 73 is provided with a plurality of shafts 73a at predetermined intervals in the core yarn C supply direction. The movable piece 74 is provided with a plurality of protrusions 74 a that protrude toward the fixed piece 73. When the movable piece 74 is closed with respect to the fixed piece 73 (the state shown in FIG. 5B), the protrusions 74a are alternately positioned with the shafts 73a in the supply direction of the core yarn C. A hole 74b through which the core yarn C is passed is formed at the tip of each projection 74a. The core yarn C is alternately hung on each shaft 73a and each hole 74b.

  As shown in FIG. 5A, when the movable piece 74 opens with respect to the fixed piece 73, the core yarn C is bent a plurality of times. Thereby, tension is applied to the core yarn C. The greater the opening angle of the movable piece 74 with respect to the fixed piece 73, the higher the tension applied to the core yarn C. The state of the tension applying unit 71 at this time is referred to as a tension applying state. As shown in FIG. 5B, when the movable piece 74 is closed with respect to the fixed piece 73, the core yarn C becomes substantially linear. As a result, no tension is applied to the core yarn C (or a lower tension is applied to the core yarn C than in the tension applied state). The state of the tension applying unit 71 at this time is referred to as a tension non-applying state.

  The holding part 72 opens and closes the movable piece 74 with respect to the fixed piece 73. As shown in FIGS. 5A and 5B, the holding portion 72 has a holding member 75 and an actuator 76. As shown in FIG. 3, the drive of the actuator 76 is controlled by the unit controller 15.

  The holding member 75 is brought into contact with and separated from the movable piece 74 by the actuator 76. More specifically, the holding member 75 is provided with a distal end portion 75 a that contacts the movable piece 74 from the opposite side of the fixed piece 73, and the position of the distal end portion 75 a is moved by the actuator 76.

  When the distal end portion 75 a moves downward, the movable piece 74 is pressed by the distal end portion 75 a and is closed with respect to the fixed piece 73. For this reason, the tension | tensile_strength provision part 71 will be in a tension | tensile_strength non-application state. When the distal end portion 75a moves upward, the movable piece 74 opens with respect to the fixed piece 73 by the biasing force of the spring. For this reason, the tension | tensile_strength provision part 71 will be in a tension | tensile_strength provision state.

  The slack imparting mechanism 80 imparts slack to the core yarn C on the downstream side of the tension imparting mechanism 70. Specifically, before the core yarn delivery mechanism 84 starts delivering the core yarn C, the position of the tip guide portion of the slack imparting mechanism 80 starts from a position including the travel path of the core yarn C (solid line in FIG. 4). By moving to a position away from the travel path of the core yarn C (a position indicated by a two-dot chain line in FIG. 4), the core yarn C is slackened. The core yarn monitoring device 82 detects the presence or absence of the core yarn C between the core yarn guide 61 and the core yarn delivery mechanism 84. In FIG. 4, the core yarn monitoring device 82 is arranged downstream of the slack imparting mechanism 80 in the supply direction of the core yarn C. The core yarn monitoring device 82 may be disposed upstream of the tension applying mechanism 70. The core yarn sending mechanism 84 sends the core yarn C (the yarn end of the core yarn C) to the draft device 6 at the start of the spinning operation on the downstream side of the core yarn monitoring device 82.

  Next, a method for controlling the tension of the yarn Y by the yarn storage device 11 will be described.

  When the spinning operation is started in the spinning unit 2 of the spinning machine 1, the tension sensor 10 measures the tension of the traveling yarn Y and transmits a tension measurement signal to the unit controller 15. The unit controller 15 rotates the yarn accumulating roller 11a at the initial rotational speed set for each lot. The initial rotational speed is set in advance so that the tension of the yarn Y detected by the tension sensor 10 is within a predetermined range. The “predetermined range” may be a range having a width or a numerical value having no width.

  When the unit controller 15 receives the tension measurement signal, the unit controller 15 determines whether or not the tension of the yarn Y indicated by the tension measurement signal is within a predetermined range. For example, the tension range of the yarn Y is input and set by the input key 104 of the machine control device 100. Alternatively, the tension range of the yarn Y may be automatically set according to the set lot.

  When the unit controller 15 determines that the tension of the yarn Y is not within the predetermined range, the unit controller 15 controls the number of rotations per unit time (hereinafter simply referred to as “number of rotations”) of the yarn accumulating roller 11a. In the present embodiment, the rotation speed of the yarn accumulating roller 11a is controlled to increase and decrease, and the draft speed of the draft device 6 (for example, the peripheral speed of the front roller pair 19) is not changed. During the period in which the control is performed, the draft operation by the draft device 6, the spinning operation by the pneumatic spinning device 8, and the winding operation by the winding device 13 are continued.

  Specifically, when the tension of the yarn Y is lower than a predetermined range, the unit controller 15 increases the rotation speed (rpm) of the yarn storage roller 11a from the initial rotation speed. More specifically, the unit controller 15 outputs a signal to the motor driver 11d to increase the rotation speed of the motor 11c. Thereby, the feed ratio of the yarn Y set by the rotational speed of the yarn accumulating roller 11a and the peripheral speed of the front roller pair 19 (the yarn Y feeding speed by the yarn accumulating roller 11a and the yarn Y feeding speed by the front roller pair 19). Change). Specifically, the feed speed of the yarn Y drawn from the pneumatic spinning device 8 by the yarn accumulating roller 11a is faster than the feed speed of the yarn Y sent from the front roller pair 19 to the pneumatic spinning device 8. This increases the tension of the yarn Y after the feed ratio is changed. When the tension of the yarn Y falls within a predetermined range based on the tension measurement signal, the unit controller 15 ends the control to increase the rotation speed of the yarn accumulating roller 11a, and the tension of the yarn Y falls within the predetermined range. The rotation speed of the yarn accumulating roller 11a is controlled so as to be maintained.

  When the tension of the yarn Y is higher than the predetermined range, the unit controller 15 reduces the rotation speed of the yarn storage roller 11a below the initial rotation speed. Thereby, the feed speed of the yarn Y drawn out from the pneumatic spinning device 8 by the yarn storage roller 11a becomes slower than the feed speed of the yarn Y sent out from the front roller pair 19 to the pneumatic spinning device 8, whereby the yarn Y The feed ratio changes. As a result, the tension of the yarn Y is lowered after the feed ratio is changed. When the tension of the yarn Y falls within a predetermined range based on the tension measurement signal, the unit controller 15 finishes the control for decreasing the rotation speed of the yarn accumulating roller 11a, and the tension of the yarn Y falls within the predetermined range. The rotation speed of the yarn accumulating roller 11a is controlled so as to be maintained.

  When the unit controller 15 determines that the tension of the yarn Y is not within a predetermined range, the unit controller 15 determines that the tension of the yarn Y is abnormal in the yarn Y (for example, the tension is too low and the yarn Y is weak). When the yarn portion is formed), the spinning operation is interrupted without controlling the rotation speed of the yarn accumulating roller 11a.

  Next, a method for controlling the tension of the yarn Y by the core yarn supply device 7 will be described.

  When the spinning operation is started in the spinning unit 2 of the spinning machine 1, the tension sensor 10 measures the tension of the traveling yarn Y and transmits a tension measurement signal to the unit controller 15. The unit controller 15 controls the actuator 76 so that the initial tension is applied to the core yarn C by the tension applying mechanism 70. The initial tension is set in advance so that the tension of the yarn Y detected by the tension sensor 10 is within a predetermined range. The unit controller 15 controls the actuator 76 and positions the tip end portion 75a at the initial position. Thereby, initial tension is applied to the core yarn C.

  When the unit controller 15 receives the tension measurement signal, the unit controller 15 determines whether or not the tension of the yarn Y indicated by the tension measurement signal is within a predetermined range. When the unit controller 15 determines that the tension of the yarn Y is not within the predetermined range, the unit controller 15 controls the tension applied to the core yarn C by the tension applying mechanism 70. Specifically, when the tension of the yarn Y is lower than a predetermined range, the unit controller 15 moves the actuator so that the tip 75a moves upward from the initial position and the movable piece 74 opens with respect to the fixed piece 73. 76 is controlled. Thereby, the tension | tensile_strength provided to the core yarn C becomes high after the movement of the front-end | tip part 75a. When the tension of the yarn Y falls within a predetermined range based on the tension measurement signal, the unit controller 15 ends the control for increasing the tension applied by the tension applying mechanism 70, and the tension of the yarn Y is determined to be the predetermined value. The tension applying mechanism 70 is controlled so as to be maintained within the range.

  When the tension of the yarn Y is higher than the predetermined range, the unit controller 15 controls the actuator 76 so that the tip end portion 75a moves below the initial position and the movable piece 74 is closed with respect to the fixed piece 73. . Thereby, the tension | tensile_strength provided to the core yarn C becomes low after the movement of the front-end | tip part 75a. When the tension of the yarn Y falls within a predetermined range based on the tension measurement signal, the unit controller 15 ends the control for reducing the tension applied by the tension applying mechanism 70, and the tension of the yarn Y is determined to be the predetermined tension. The tension applying mechanism 70 is controlled so as to be maintained within the range.

  When the unit controller 15 determines that the tension of the yarn Y is not within the predetermined range and the tension of the yarn Y is a value that determines that the yarn Y is abnormal, the control of the tension applying mechanism 70 is performed. First, the spinning operation is interrupted.

  The tension of the yarn Y may be controlled by controlling at least one of the yarn accumulating device 11 and the core yarn supplying device 7. That is, the tension of the yarn Y may be controlled by controlling the number of rotations of the yarn accumulating roller 11a, or may be controlled by controlling the application of tension to the core yarn C by the tension applying mechanism 70. The tension of the yarn Y may be controlled by controlling both the yarn accumulating roller 11a and the tension applying mechanism 70 of the core yarn supplying device 7. During the period in which the above control is performed, the draft operation by the draft device 6, the spinning operation by the pneumatic spinning device 8, and the winding operation by the winding device 13 are continued.

  As described above, in the spinning machine 1 according to the present embodiment, the device that acts on the tension of the yarn Y is controlled based on the detection result of the tension sensor 10 so that the tension of the yarn Y is within a predetermined range. Is done. Thus, in the spinning machine 1, since the apparatus is feedback-controlled based on the tension of the yarn Y detected by the tension sensor 10, the tension of the yarn Y can be maintained within a predetermined range. Therefore, the spinning machine 1 can improve the yarn quality.

  In the present embodiment, the unit controller 15 rotates the yarn accumulating roller 11a based on the tension measurement signal transmitted from the tension sensor 10 so that the tension of the yarn Y detected by the tension sensor 10 falls within a predetermined range. Control the number. The feed ratio changes due to a change in the number of rotations per unit time of the yarn accumulating roller 11a. Thereby, the tension of the yarn Y stored by the yarn storage roller 11a can be changed. Therefore, in the spinning machine 1, the tension of the yarn Y can be effectively controlled by controlling the rotation speed of the yarn accumulating roller 11 a based on the tension measurement signal transmitted from the tension sensor 10.

  Specifically, when the tension of the yarn Y is lower than a predetermined range in the tension measurement signal, the unit controller 15 sets the rotation speed per unit time of the yarn accumulating roller 11a so that the tension of the yarn Y is within the predetermined range. Raise until When the tension of the yarn Y is higher than the predetermined range in the tension measurement signal, the unit controller 15 reduces the rotation speed of the yarn accumulating roller 11a until the tension of the yarn Y falls within the predetermined range. Increasing the rotation speed of the yarn storage roller 11a can increase the tension of the yarn Y, and decreasing the rotation speed of the yarn storage roller 11a can decrease the tension of the yarn Y. Therefore, the unit controller 15 controls the number of rotations of the yarn accumulating roller 11a based on the tension measurement signal, so that the tension of the yarn Y can be maintained within a predetermined range.

  In the present embodiment, the yarn storage roller 11a stores the yarn Y generated by the pneumatic spinning device 8 while drawing it out. In other words, a delivery roller and a nip roller that draw the yarn Y from the air spinning device 8 are not disposed between the air spinning device 8 and the yarn accumulating roller 11a. Thereby, the tension of the yarn Y generated in the pneumatic spinning device 8 can be controlled by the yarn accumulating roller 11a. Therefore, since the yarn Y is generated with the optimum spinning tension in the pneumatic spinning device 8, the yarn quality can be improved.

  In the present embodiment, the spinning machine 1 includes a package support 50 that supports the core yarn package CP around which the core yarn C is wound, and a tension application that applies tension to the core yarn C that has been unwound from the core yarn package CP. And a core yarn supply device 7 having a mechanism 70. The unit controller 15 controls the tension applying mechanism 70 based on the tension measurement signal transmitted from the tension sensor 10 so that the tension of the yarn Y detected by the tension applying mechanism 70 falls within a predetermined range. Thereby, the yarn quality of the yarn Y wound up by the winding device 13 can be improved.

  Subsequently, another embodiment will be described. In the spinning machine 1 according to another embodiment, the bottom roller of the front roller pair 19 (hereinafter sometimes referred to as “front bottom roller”) is provided with a drive provided in each spinning unit 2 as shown in FIG. The motor 20 is rotationally driven. The drive motor 20 is controlled by a motor driver 20a. The motor driver 20 a controls driving of the drive motor 20 based on a signal output from the unit controller 15. The bottom rollers of the back roller pair 16, the third roller pair 17, and the middle roller pair 18 may be rotationally driven by a drive motor provided in each spinning unit 2, or by a drive motor provided in the second end frame 5. It may be rotationally driven.

  A method for controlling the tension of the yarn Y by the front roller pair 19 will be described.

  When the spinning operation is started in the spinning unit 2 of the spinning machine 1, the tension sensor 10 measures the tension of the traveling yarn Y and transmits a tension measurement signal to the unit controller 15. The unit controller 15 rotates the front roller pair 19 of the draft device 6 at an initial speed set for each lot. The initial speed is set in advance so that the tension of the yarn Y detected by the tension sensor 10 is within a predetermined range.

  When the unit controller 15 receives the tension measurement signal, the unit controller 15 determines whether or not the tension of the yarn Y indicated by the tension measurement signal is within a predetermined range. When the unit controller 15 determines that the tension of the yarn Y is not within the predetermined range, the unit controller 15 controls the peripheral speed of the front roller pair 19 (front bottom roller). In this embodiment, the peripheral speed of the front bottom roller is controlled to increase and decrease, and the rotation speed of the yarn accumulating roller 11a is not changed for controlling the tension of the yarn Y. During the period in which the control is performed, the draft operation by the draft device 6, the spinning operation by the pneumatic spinning device 8, and the winding operation by the winding device 13 are continued.

  Specifically, when the tension of the yarn Y is lower than a predetermined range, the unit controller 15 makes the peripheral speed of the front roller pair 19 slower than the initial speed. More specifically, the unit controller 15 outputs a signal to the motor driver 20 a of the drive motor 20 to reduce the rotation speed (rpm) of the drive motor 20.

  Thereby, the feed ratio of the yarn Y set by the rotational speed of the yarn accumulating roller 11a and the peripheral speed of the front roller pair 19 changes. Specifically, the speed of the yarn Y sent out from the front roller pair 19 to the pneumatic spinning device 8 is slower than the speed of the yarn Y drawn out from the pneumatic spinning device 8 by the yarn storage roller 11a. This increases the tension of the yarn Y after the feed ratio is changed. When the tension of the yarn Y falls within a predetermined range based on the tension measurement signal, the unit controller 15 finishes the control for reducing the peripheral speed of the front bottom roller, and maintains the tension of the yarn Y within the predetermined range. To control the peripheral speed of the front bottom roller.

  When the tension of the yarn Y is higher than the predetermined range, the unit controller 15 makes the peripheral speed of the front roller pair 19 faster than the initial speed. As a result, the speed of the yarn Y sent out from the front roller pair 19 to the pneumatic spinning device 8 becomes higher than the speed of the yarn Y drawn out from the pneumatic spinning device 8 by the yarn storage roller 11a. The ratio changes. As a result, the tension of the yarn Y is lowered after the feed ratio is changed. When the tension of the yarn Y falls within a predetermined range based on the tension measurement signal, the unit controller 15 finishes the control for increasing the peripheral speed of the front bottom roller, and the tension of the yarn Y falls within the predetermined range. The peripheral speed of the front bottom roller is controlled so as to be maintained.

  In the case where the bottom roller of at least one of the back roller pair 16, the third roller pair 17 and the middle roller pair 18 is rotationally driven by the drive motor provided in each spinning unit 2, the peripheral speed of the front roller pair 19 is In addition to the control, the peripheral speed of at least one of the back roller pair 16, the third roller pair 17, and the middle roller pair 18 may be controlled.

  In the present embodiment, the unit controller 15 controls the peripheral speed of the front roller pair 19 based on the tension measurement signal transmitted from the tension sensor 10. The feed ratio is changed by the change in the peripheral speed of the front roller pair 19 of the draft device 6. Thereby, the tension of the fiber bundle F (yarn Y) can be changed on the downstream side of the front roller pair 19. Therefore, the spinning machine 1 can effectively control the tension of the yarn Y by controlling the peripheral speed of the front roller pair 19 based on the tension measurement signal transmitted from the tension sensor 10.

  Specifically, when the tension of the yarn is lower than a predetermined range in the tension measurement signal, the unit controller 15 sets the peripheral speed of the front roller pair 19 until the tension of the yarn Y falls within the predetermined range. Make it slower. When the tension of the yarn Y is higher than the predetermined range in the tension measurement signal, the unit controller 15 increases the peripheral speed of the front roller pair 19 higher than the initial speed until the tension of the yarn Y falls within the predetermined range. . By increasing the peripheral speed of the front roller pair 19, the tension of the yarn Y can be lowered. By reducing the peripheral speed of the front roller pair 19, the tension of the yarn Y can be increased. Therefore, the unit controller 15 controls the peripheral speed of the front roller pair 19 based on the tension measurement signal, whereby the tension of the yarn Y can be maintained within a predetermined range.

  The tension of the yarn Y may be controlled by at least one of the draft device 6, the core yarn supply device 7, and the yarn storage device 11. The tension of the yarn Y may be controlled by controlling both the front roller pair 19 of the draft device 6 and the yarn storage device 11. Alternatively, the tension of the yarn Y may be controlled by controlling both the front roller pair 19 of the draft device 6 and the tension applying mechanism 70 of the core yarn supplying device 7. Alternatively, the tension of the yarn Y is controlled by controlling three devices: the front roller pair 19 of the draft device 6, the tension applying mechanism 70 of the core yarn supply device 7, and the yarn storage roller 11 a of the yarn storage device 11. May be.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment.

  In the above embodiment, the feedback control based on the detection result of the tension sensor 10 is performed while the winding operation of the package P is continued. However, for example, if the tension of the yarn Y detected by the tension sensor 10 does not fall within a predetermined range even after feedback control is performed for a predetermined period, the spinning operation and the winding operation in the spinning unit 2 may be stopped. . Further, at least one of the draft device 6, the yarn accumulating device 11, and the tension applying mechanism 70 is controlled by feedback control (for example, the number of rotations of the front roller pair 19 and / or the yarn accumulating roller 11a, and the tension applying mechanism 70). A limit range may be provided for the tension application amount. In this case, when the control amount is out of the limit range, the spinning operation and the winding operation in the spinning unit 2 may be stopped. When the spinning operation and the winding operation are stopped for any of the above reasons, the display screen 102 and / or an unillustrated display section provided in each spinning unit 2 displays that an error has occurred. Also good.

  In the embodiment described above, an example in which the spinning unit 2 of the spinning machine 1 includes the core yarn supply device 7 has been described. However, the core yarn supply device 7 may not be provided in the spinning unit 2.

  In the above embodiment, the tension applying unit 71 of the tension applying mechanism 70 of the core yarn supplying device 7 has been described as an example in which the tension is applied to the yarn Y by bending the core yarn C a plurality of times. However, in the tension applying mechanism 70, instead of controlling the actuator 76, the tension applying portion 71 is made to be the core yarn by electrically adjusting the degree of opening and closing of the movable piece 74 with respect to the fixed piece 73 by the winding angle of a spring (not shown). The tension applied to C may be adjusted. Further, the mechanism for applying tension to the core yarn C is not limited to this. The mechanism for tensioning the core yarn C may be, for example, a form in which the yarn path of the core yarn C is bent with a disk. The position where tension is applied to the core yarn C may be other positions as long as it is upstream of the core yarn guide portion 52.

  In the embodiment described above, an example in which the tension sensor 10 measures the tension of the traveling yarn Y between the pneumatic spinning device 8 and the yarn storage device 11 has been described. However, the position of the tension sensor 10 is not limited to this position. The tension sensor 10 may measure the tension of the yarn Y at any position between the pneumatic spinning device 8 and the winding device 13.

  In the above embodiment, the control unit that controls the yarn forming unit and the winding device 13 so as to wind the yarn Y while adjusting the tension applied by the yarn forming unit based on the detection result of the tension sensor 10. In the above description, the unit controller 15 is taken as an example. However, the control unit may be the machine base control device 100.

  The air spinning device 8 may further include a needle that is held by the fiber guide and arranged to protrude into the spinning chamber in order to prevent the twist of the fiber bundle from being transmitted to the upstream side of the air spinning device. Good. In addition, the pneumatic spinning device may prevent the twist of the fiber bundle from being transmitted to the upstream side of the pneumatic spinning device by using the downstream end portion of the fiber guide portion instead of such a needle. Further, the pneumatic spinning device may include a pair of air jet nozzles that twists the fiber bundle in opposite directions instead of the above configuration. The spinning machine may be an open-end spinning machine.

  In the spinning unit 2, the yarn storage device 11 has a function of drawing the yarn Y from the pneumatic spinning device 8. However, the yarn Y may be drawn from the pneumatic spinning device 8 by a delivery roller and a nip roller. In this case, the yarn storage device 11 may be omitted. Alternatively, in this case, a slack tube or a mechanical compensator that absorbs the slack of the yarn Y by a suction air flow may be provided instead of the yarn accumulating device 11. In the configuration including the delivery roller, the unit controller 15 controls the peripheral speed of the delivery roller when determining that the tension of the yarn Y is not within the predetermined range. The feed ratio of the yarn Y changes due to the change in the peripheral speed of the delivery roller. Thereby, the tension of the yarn Y drawn by the delivery roller can be changed. Therefore, in the spinning machine, the tension of the yarn Y can be effectively controlled by controlling the peripheral speed of the delivery roller based on the detection result of the tension sensor 10.

  In the spinning machine 1, in the height direction, each device is arranged so that the yarn Y supplied on the upper side is wound on the lower side. However, each device may be arranged so that the yarn supplied on the lower side is wound up on the upper side. In this configuration, it is preferable that the first air pipe and the first distribution pipe are arranged below the air spinning device 8 in the height direction of the spinning unit 2. It is preferable that the first distribution pipe is disposed so that the connection portion with the pneumatic spinning device is at the highest position.

  In the spinning machine 1, the traverse guide 23 is driven by the power from the second end frame 5 (that is, common to the plurality of spinning units 2). However, each part of the spinning unit 2 (for example, an air spinning device, a winding device, etc.) may be driven independently for each spinning unit 2.

  In the traveling direction of the yarn Y, the tension sensor 10 may be disposed on the upstream side of the yarn monitoring device 9. The unit controller 15 may be provided for each spinning unit 2. In the spinning unit 2, the yarn monitoring device 9 and the waxing device 12 may be omitted.

  In FIG. 1, the spinning machine 1 is illustrated so as to wind up the cheese-shaped package P, but it is also possible to wind up the cone-shaped package. In the case of a cone-shaped package, yarn slack is generated by traverse of the yarn, but the slack can be absorbed by the yarn storage device 11. The material and shape of each component are not limited to the materials and shapes described above, and various materials and shapes can be employed. The spinning machine may be other than the spinning machine 1 having the air spinning device 8, and may be a ring spinning machine, for example. The ring spinning machine is a spinning machine that forms a yarn from a fiber bundle (spun material) and winds the yarn around a spinning bobbin. The yarn forming unit in the ring spinning machine is a front roller pair of a draft device and / or a tension applying unit of a core yarn supplying device. When the spinning machine is a ring spinning machine, the ring spinning machine may include a core yarn supply device or may not include a core yarn supply device. When the core yarn supply device is provided, the spinning material is a fiber bundle and / or a core yarn.

  DESCRIPTION OF SYMBOLS 1 ... Spinning machine, 6 ... Draft device (yarn forming unit), 7 ... Core yarn supplying device (yarn forming unit), 8 ... Pneumatic spinning device, 10 ... Tension sensor (tension detecting unit), 11a ... Yarn storage roller (yarn) Forming unit), 15 ... unit controller (control unit), 19 ... front roller pair, 50 ... package support unit (support unit), 70 ... tension applying mechanism (tension applying unit), Y ... thread.

Claims (8)

While adjusting the tension of the spinning material, a yarn forming part for forming a yarn from the spinning material;
A winding device for winding the yarn formed in the yarn forming section;
A tension detector that detects the tension of the yarn on the upstream side of the winding device in the traveling direction of the yarn;
A control unit that controls the yarn forming unit and the winding device so as to wind the yarn while adjusting the tension applied by the yarn forming unit based on the detection result of the tension detecting unit; Spinning machine equipped with. The yarn forming unit includes a support unit that supports a core yarn package around which the core yarn is wound, and a tension applying unit that applies tension to the core yarn unwound from the core yarn package. Equipped with equipment,
The control unit controls the operation of the yarn forming unit based on the detection result of the tension detection unit,
The spinning machine according to claim 1, wherein the winding device winds the yarn including the core yarn.   The said control part controls the said tension | tensile_strength provision part based on the said detection result of the said tension | tensile_strength detection part so that the tension | tensile_strength of the said thread | yarn detected in the said tension | tensile_strength detection part may be in a predetermined range. The spinning machine described. The yarn forming section includes a draft device for drafting a fiber bundle that is the spinning material,
The draft device has a plurality of roller pairs including a front roller pair arranged on the most downstream side in the draft direction of the fiber bundle,
The spinning machine according to any one of claims 1 to 3, wherein the control unit controls a peripheral speed of the pair of front rollers based on the detection result of the tension detection unit. The controller is
When the tension of the yarn is lower than a predetermined range in the detection result, control is performed so that the current peripheral speed of the front roller pair is decreased until the tension of the yarn falls within the predetermined range.
When the tension of the yarn is higher than the predetermined range in the detection result, control is performed to increase the current peripheral speed of the front roller pair until the tension of the yarn falls within the predetermined range. The spinning machine according to claim 4. The yarn forming unit includes a yarn storage roller that is disposed upstream of the winding device in the traveling direction of the yarn and stores the yarn.
The controller controls the number of rotations per unit time of the yarn accumulating roller based on the detection result of the tension detector so that the yarn tension detected by the tension detector falls within a predetermined range. The spinning machine according to any one of claims 1 to 5, which is controlled. The controller is
If the yarn tension is lower than the predetermined range in the detection result, control is performed to increase the current rotation speed of the yarn accumulating roller until the yarn tension falls within the predetermined range;
When the yarn tension is higher than the predetermined range in the detection result, control is performed so as to reduce the current rotation speed of the yarn accumulating roller until the yarn tension falls within the predetermined range. Item 7. The spinning machine according to item 6. An air spinning device for generating the yarn by causing a swirling air flow to act on the fiber bundle;
The spinning machine according to claim 6 or 7, wherein the yarn storage roller stores the yarn generated by the pneumatic spinning device while pulling out the yarn.

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