JP2014040316A - Yarn winding unit and yarn winder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a yarn winding unit preventing yarn breakage by contact of a traverse device and yarn by controlling a traverse speed when winding of the yarn is started.SOLUTION: A yarn winding unit comprises a winding unit and a control unit. The winding unit winds yarn around a winding pipe and forms a package. The control unit controls the winding unit. The winding unit comprises a winding pipe leg, a contact roller and a traverse device. The winding pipe leg supports the winding pipe. The contact roller contacts with the winding pipe or the package to rotate. The traverse device is installed independently from the contact roller and traverses the yarn wound around the winding pipe. The control unit controls the winding unit so that a traverse speed of the traverse device at the time when winding of the yarn is started becomes not more than a required speed.

Description

  The present invention mainly relates to a yarn winding unit that winds a yarn while traversing to form a package.

  2. Description of the Related Art Conventionally, a yarn winding machine is known in which a winding tube is rotatably supported by a cradle, and a yarn is wound around the outer peripheral surface of the winding tube while being wound to form a package. This type of yarn winding machine includes, for example, a traverse guide that engages with a yarn and traverses the yarn, and a traverse drive unit that drives the traverse guide as a configuration for traversing the yarn.

  Patent Document 1 describes that a traverse drive unit is controlled to change a traverse width of a traverse device. Specifically, the yarn winding machine narrows the traverse width when accelerating the rotational speed (winding speed) of the package, and widens the traverse width when the predetermined winding speed is reached (the traverse width is set to a steady value). To do).

  With this configuration, it is possible to suppress the occurrence of annual rings and / or twill. As control of the traverse width when accelerating the winding speed, a pattern in which a constant traverse width is set and a pattern in which the traverse width is gradually increased according to the winding speed are disclosed.

JP 2009-227212 A

  When yarn breakage or the like occurs during winding of the yarn, the yarn is spliced and then the traverse device captures the yarn. Then, the rotational speed of the package is increased while traversing the yarn. Also, when the package is full and a new take-up tube is supplied to the cradle, a bunch winding is formed on the take-up tube, and then the traverse device captures the yarn and increases the rotational speed of the package. To go. When the traverse device tries to catch the yarn while the traverse speed of the traverse device is high, yarn breakage may occur due to contact between the traverse device and the yarn.

  This type of yarn breakage is particularly likely to occur in a yarn winding machine in which a doffing device or the like forms a bunch winding. Hereinafter, a description will be given with reference to FIG. The traverse speed becomes zero at the end of the traverse width and becomes the highest speed at the center of the traverse width or in the vicinity thereof (central region), but FIG. 10 does not show such a fine change. In the yarn winding machine, since the traverse speed is generally synchronized with the rotational speed of the package, both speeds are basically indicated by the same line.

FIG. 10A shows the transition of the rotational speed (that is, the traverse speed) of the package after piecing. Since the package is not rotated during yarn splicing, the initial rotational speed of the package is zero. Further, the yarn is captured by the traverse device at _a predetermined timing (after elapse of time ta) after the rotation of the package is started. Traverse speed at this time is v _a.

FIG. 10B shows the transition of the rotational speed (that is, the traverse speed) of the package after the bunch winding is performed by the doffing device or the like. Since the bunch winding with a doffing device or the like is performed while rotating the package, the initial rotational speed of the package is not zero. Further, the rotational speed of the package is accelerated at the same acceleration as after piecing, and the timing at which the traverse device captures the yarn after starting the winding of the yarn is the same as the timing after piecing. Accordingly, by the amount corresponding to the initial speed of the rotation speed of the package, the traverse speed during the capture of the yarn is increased (specifically, v _b -v _a). Therefore, yarn breakage due to contact between the traverse device and the yarn is likely to occur.

  The present invention has been made in view of the above circumstances, and its main purpose is to control the traverse speed when starting the winding of the yarn to prevent yarn breakage due to contact between the traverse device and the yarn. It is to provide a yarn winding unit.

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 the first aspect of the present invention, the yarn winding unit includes a winding unit and a control unit. The winding unit winds a thread around a winding tube to form a package. The control unit controls the winding unit. The winding unit includes a winding tube support unit, a contact roller, and a traverse device. The winding tube support part supports the winding tube. The contact roller rotates in contact with the winding tube or the package. The traverse device is provided independently of the contact roller, and traverses the yarn wound around the winding tube. The control unit controls the winding unit such that a traverse speed of the traverse device when starting the winding of the yarn becomes a predetermined speed or less.

  As a result, the traverse speed of the traverse device when capturing the yarn can be reduced to a predetermined speed or less, so that the traverse device can be prevented from coming into contact with the yarn at high speed and breaking the yarn.

  The yarn winding unit includes a storage unit that stores at least a first acceleration and a second acceleration whose acceleration is smaller than the first acceleration. The control unit controls the winding unit to accelerate the traverse speed of the traverse device at the first acceleration when starting the winding of the yarn from when the winding tube or the package is stopped. Then, the winding unit is controlled so that the traverse speed of the traverse device when starting the winding of the yarn from the time when the winding tube or the package is rotating is accelerated by the second acceleration.

  Thereby, the thread breakage due to the contact between the traverse device and the thread can be prevented by a simple process of properly using the two accelerations.

  In the yarn winding unit, the control unit is configured to control a traverse speed of the traverse device so as to correspond to a rotation speed of the winding tube or the package.

  As described above, when the traverse speed of the traverse device is made to correspond to the rotational speed of the winding tube or the package, when the winding tube or the like is rotating before driving the traverse device (after the bunch winding, etc.) Following the rotational speed of the tube or package, the traverse speed of the traverse device is greatly increased. However, when the yarn is captured by adjusting the acceleration of the traverse speed of the traverse device (that is, the acceleration of the rotational speed of the winding tube, etc.) based on the rotational speed of the winding tube or package as described above. Yarn breakage can be prevented by suppressing the traverse speed of the traverse device.

  In the yarn winding unit, the traverse device includes a traverse guide that engages with the yarn to traverse the yarn, and a first drive unit that reciprocally drives the traverse guide. The yarn winding unit includes a second drive unit that is provided independently of the first drive unit and that rotationally drives the winding tube or the package.

  Thus, for example, even when the winding tube or the package is rotating at a high speed, the traverse device is controlled so that the traverse speed is low, and the traverse device is brought into contact with the yarn. Thread breakage can be prevented.

  According to a second aspect of the present invention, a yarn winding machine includes a plurality of the yarn winding units.

  Thereby, a yarn winding machine capable of preventing yarn breakage due to contact between the traverse device and the yarn can be realized.

  The yarn winding machine includes a setting unit that sets an acceleration of the traverse speed of the traverse device when starting the winding of the yarn.

  As a result, for example, when the yarn is thin, it is possible to reliably prevent yarn breakage due to contact between the traverse device and the yarn by reducing the acceleration of the traverse speed or by increasing the timing at which the traverse device captures the yarn. it can.

  The yarn winding machine includes a winding tube supply device that supplies the winding tube to at least one of the winding units of the plurality of yarn winding units.

  Thereby, it is possible to prevent yarn breakage due to contact between the traverse device and the yarn after the take-up tube is supplied by the take-up tube supply device.

  The yarn winding machine includes a bunch winding device, a yarn joining device, and a guide member. The bunch winding device forms a bunch winding on the winding tube supplied to the winding unit by the winding tube supply device. The yarn splicing device splics the guided yarn. The guide member guides at least the yarn end on the package side to the yarn joining device. The controller drives the traverse speed of the traverse device at a second acceleration after the bunch winding is formed by the bunch winding device, and sets the traverse speed of the traverse device to the second acceleration after the yarn splicing by the yarn splicing device. The winding unit is controlled so as to be driven at a first acceleration that is smaller than the first acceleration.

  As a result, the package rotation speed is faster after forming the bunch winding than after splicing. By performing the above control, the traverse speed of the traverse device when capturing the yarn is suppressed to prevent yarn breakage. it can.

The front view of the automatic winder which concerns on one Embodiment of this invention. The front view and block diagram of a yarn winding unit. The side view of a yarn winding unit. FIG. 3 is a side view of a yarn winding unit showing a state in which an upper yarn and a lower yarn are guided to a yarn joining device. The side view of the yarn winding unit showing the state of the first half of the doffing operation. The side view of the yarn winding unit showing the state of the latter half of the doffing operation. The graph which shows the change of the package rotational speed (traverse speed) after yarn splicing and bunch winding. The graph which shows the other example which adjusts the package rotational speed (traverse speed) at the time of thread | yarn capture | acquisition. The perspective view which shows a mode that bunch winding is performed manually. The graph which shows the change of the package rotational speed (traverse speed) after the yarn splicing and bunch winding of the conventional yarn winding machine.

  Next, embodiments of the present invention will be described with reference to the drawings. In the present specification, “upstream” and “downstream” mean upstream and downstream in the traveling direction of the yarn when winding the yarn.

  As shown in FIG. 1, an automatic winder (yarn winding machine) 1 includes a plurality of yarn winding units 10 arranged side by side, a doffing device (winding tube supply device, bunch winding device) 60, and a machine base control device. 90.

  Each of the yarn winding units 10 winds the yarn 20 unwound from the yarn supplying bobbin 21 while traversing the yarn 20 around a winding tube 22 supported by a cradle (winding tube support portion) 23, and the package. 30 is formed.

  The doffing device 60 travels to the position of the yarn winding unit 10 when the package 30 becomes full in each yarn winding unit 10, collects the fully wound package 30 and is not wound with the yarn 20. A winding tube 22 (empty bobbin) is supplied.

  As shown in FIG. 1, the doffing device 60 includes a carriage unit 61, a thread drawing arm 62, a cradle release arm 63, and a gripping unit 64. The carriage unit 61 can travel along a rail (not shown) disposed above the yarn winding unit 10 along the direction in which the yarn winding units 10 are arranged.

  The yarn pull-out arm 62 includes an air cylinder (cylinder) disposed substantially in the vertical direction. The tip (lower end) of the cylinder rod of the air cylinder can catch the yarn 20. The yarn drawing arm 62 can capture the yarn 20 and draw it to the vicinity of the cradle 23.

  The cradle release arm 63 can be operated to open the cradle 23 to remove the full package 30 from the cradle 23.

  The gripping portion 64 can attach the winding tube 22 to the cradle 23 by gripping the winding tube 22 stored in a bobbin stocker 38 (FIG. 3) described later and rotating around the shaft 65.

  The machine base control device 90 includes a machine base setting unit (setting unit) 91 and a machine base display unit 92. The machine base setting unit 91 can perform setting for each yarn winding unit 10 by an operator inputting a predetermined setting value or selecting an appropriate control method. The machine base display unit 92 can display the winding status of the yarn 20 of each yarn winding unit 10 and the content of the trouble that has occurred.

  Next, the configuration of the yarn winding unit 10 will be specifically described with reference to FIGS. 2 and 3.

  Each yarn winding unit 10 includes a winding unit main body 16 and a control unit 50, as shown in FIG.

  The control unit 50 includes a unit control unit 51, a package drive control unit 42, and a traverse drive control unit 78. The unit control unit 51 includes, for example, a CPU, a RAM, a ROM, an I / O port, and a communication port. In this ROM, a program for controlling each part of the winding unit main body 16 is recorded. The I / O port and the communication port are connected to each unit included in the winding unit main body 16 and the machine base control device 90, and can communicate control information and the like. Thereby, the unit control part 51 can control operation | movement of each part with which the winding unit main body 16 is provided. The package drive control unit 42 controls the drive of the package 30 (specifically, the package drive motor 41). The traverse drive control unit 78 controls the drive of the traverse device 70 (specifically, the traverse drive motor 76).

  The winding unit body 16 includes, in order from the yarn feeding bobbin 21 side, the yarn unwinding assisting device 12, the tension applying device 13, and the yarn joining in the yarn traveling path between the yarn feeding bobbin 21 and the contact roller 29. The apparatus 14, the clearer 15, and the winding part 18 are arrange | positioned.

  The yarn unwinding assisting device 12 lowers the regulating member 40 covering the core pipe of the yarn supplying bobbin 21 in conjunction with the unwinding of the yarn 20 from the yarn supplying bobbin 21, so that the yarn 20 from the yarn supplying bobbin 21 is lowered. Assist with unraveling. The regulating member 40 comes into contact with the balloon formed on the upper portion of the yarn feeding bobbin 21 by the rotation and centrifugal force of the yarn 20 unwound from the yarn feeding bobbin 21, and the yarn is controlled by controlling the balloon to an appropriate size. Assists 20 unraveling. A sensor (not shown) for detecting the chase portion of the yarn feeding bobbin 21 is provided in the vicinity of the regulating member 40. When this sensor detects the descent of the chase portion, the regulating member 40 is lowered by, for example, an air cylinder (not shown).

  The tension applying device 13 applies a predetermined tension to the traveling yarn 20. As the tension applying device 13, for example, a gate type in which movable comb teeth are arranged with respect to fixed comb teeth can be used. The movable comb teeth can be rotated by a rotary solenoid so that the comb teeth are in a meshed state or a released state. In addition to the gate type, for example, a disk type can be adopted as the tension applying device 13.

  The yarn joining device 14 includes a lower yarn on the yarn feeding bobbin 21 side and a package 30 side when the clearer 15 detects a yarn defect and performs yarn cutting or when the yarn breakage occurs during unwinding from the yarn feeding bobbin 21. The upper thread is spliced. As the yarn joining device 14, a mechanical type or a configuration using a fluid such as compressed air can be employed.

  The clearer 15 includes a clearer head 49 in which a sensor (not shown) for detecting the thickness of the yarn 20 is disposed, and an analyzer 52 that processes a yarn thickness signal from the sensor. The clearer 15 detects a yarn defect such as a slab by monitoring a yarn thickness signal from the sensor. In the vicinity of the clearer head 49, a cutter 39 for cutting the yarn 20 immediately when the clearer 15 detects a yarn defect is provided.

  On the lower side and the upper side of the yarn joining device 14, the lower yarn catching member 25 that catches the yarn end on the yarn feeding bobbin 21 side and guides it to the yarn joining device 14, and the yarn end on the package 30 side is caught. An upper thread catching member (guide member) 26 that guides the apparatus 14 is provided. The lower thread catching member 25 includes a lower thread pipe arm 33 and a lower thread suction port 32 formed at the tip of the lower thread pipe arm 33. The upper thread catching member 26 includes an upper thread pipe arm 36 and an upper thread suction port 35 formed at the tip of the upper thread pipe arm 36.

  The lower thread pipe arm 33 and the upper thread pipe arm 36 are rotatable about shafts 34 and 37, respectively. Appropriate negative pressure sources (not shown) are connected to the lower thread pipe arm 33 and the upper thread pipe arm 36, respectively. Accordingly, a suction flow is generated at the lower thread suction port 32 and the upper thread suction port 35, and the lower thread pipe arm 33 and the upper thread pipe arm 36 can suck and capture the thread ends of the upper thread and the lower thread.

  The winding unit 18 includes a cradle 23 that removably supports the winding tube 22, a contact roller 29 that can rotate in contact with the outer peripheral surface of the winding tube 22 or the outer peripheral surface of the package 30, a traverse device 70, It has.

  The cradle 23 can be rotated around a rotation shaft 48. The increase in the yarn layer diameter accompanying the winding of the yarn 20 around the winding tube 22 can be absorbed by the rotation of the cradle 23. As shown in FIG. 3, a bobbin stocker 38 for storing the winding tube 22 is provided above the cradle 23.

  A package drive motor (second drive unit) 41 is attached to the cradle 23. The winding tube 22 is rotationally driven by the package drive motor 41 to wind the yarn 20 around the winding tube 22. When the winding tube 22 is supported by the cradle 23, the motor shaft of the package drive motor 41 is connected to the winding tube 22 so as not to be relatively rotatable (so-called direct drive system). The operation of the package drive motor 41 is controlled by the package drive control unit 42. The package drive control unit 42 adjusts the rotational speed (or acceleration thereof) of the package drive motor 41 in response to an instruction from the unit control unit 51.

  The traverse device 70 includes a traverse guide 74 and a traverse drive motor (first drive unit) 76. The traverse guide 74 engages with the yarn 20 and traverses the yarn 20. The traverse guide 74 is driven by a traverse drive motor 76. The traverse drive motor 76 is provided independently of the package drive motor 41. The operation of the traverse drive motor 76 is controlled by a traverse drive control unit 78. For example, a hook-shaped thread guide portion is formed at the distal end portion of the traverse guide 74. When the yarn 20 is held (guided) by the yarn guide portion, the traverse device 70 performs a reciprocating swivel motion, whereby the yarn 20 can be traversed. A guide plate 28 is provided slightly upstream of the traverse portion. The guide plate 28 guides the upstream yarn 20 to the traverse location.

  In the present embodiment, the traverse speed of the traverse device 70 (speed at which the traverse guide 74 reciprocates) is controlled so as to be synchronized with (corresponding to) the rotational speed of the package 30. That is, the unit control unit 51 instructs the package drive control unit 42 about the determined rotation speed (or acceleration) of the package 30 and also instructs the traverse drive control unit 78 to synchronize with the determined rotation speed. I do. Further, the unit control unit 51 includes a storage unit 54. In the storage unit 54, the acceleration of the rotational speed of the package 30 when the winding of the yarn 20 is started (that is, the acceleration of the traverse speed of the traverse device 70). Candidates are stored. Note that “when starting to wind the yarn 20” is a concept including not only when starting winding the yarn 20 around the winding tube 22 for the first time but also when starting winding the yarn 20 again after the winding is interrupted. is there. The operator can instruct which of the accelerations stored in the storage unit 54 is to be used by operating the setting unit 55 or the machine base setting unit 91 provided in the winding unit main body 16 (details will be described later).

  Thus, in the automatic winder 1, the yarn 20 unwound from the yarn supplying bobbin 21 travels substantially upward and is wound around the package 30.

  Next, the flow of yarn splicing will be described with reference to FIGS.

  When the yarn 20 is cut between the yarn feeding bobbin 21 and the package 30 due to yarn cutting performed by the clearer 15 by detecting a yarn defect, or yarn breakage during unwinding from the yarn feeding bobbin 21 or the like. The package drive control unit 42 stops the rotation of the package 30, and the traverse drive control unit 78 stops driving the traverse guide 74.

  The lower yarn catching member 25 sucks and catches the yarn end of the lower yarn above the yarn unwinding assisting device 12 or the like. Thereafter, the lower thread catching member 25 rotates upward about the shaft 34 to introduce the lower thread into the yarn joining device 14 as shown in FIG. At substantially the same time, the upper thread catching member 26 rotates upward from the position shown in FIG. 3 about the shaft 37, and sucks and catches the thread end of the upper thread existing on the surface of the package 30. Subsequently, the upper thread catching member 26 rotates downward about the shaft 37 to introduce the upper thread into the yarn joining device 14 as shown in FIG.

  Then, when the upper yarn and the lower yarn are introduced into the yarn joining device 14 as shown in FIG. 4, the upper yarn and the lower yarn are joined by driving the yarn joining device 14, and the yarn feeding bobbin 21 The yarn 20 is in a continuous state with the package 30. Thereafter, the package drive control unit 42 starts rotating the package 30, and the traverse drive control unit 78 starts driving the traverse guide 74. When the traverse guide 74 captures the yarn 20 and performs traverse, the winding of the yarn 20 around the package 30 can be started (resumed).

  Next, a flow when the fully packaged package 30 is doffed and the yarn 20 is wound around the new winding tube 22 will be described with reference to FIGS. 5 and 6.

  When the yarn 20 is wound around the package 30 and the winding length reaches a predetermined length and becomes full, the unit controller 51 sends a signal to the clearer 15 to operate the cutter 39 and cut the yarn 20. . Thereby, the yarn 20 on the downstream side from the cut portion is wound around the package 30.

  At the same time, the unit controller 51 rotates the lower thread catching member 25 downward to suck the lower thread end into the lower thread suction port 32. A solid line in FIG. 5 shows a state in which the lower thread capturing member 25 captures the thread 20. The unit control unit 51 also instructs the package drive control unit 42 to stop the rotation of the package 30 and instructs the traverse drive control unit 78 to stop driving the traverse guide 74.

  Next, the unit control unit 51 transmits a doffing request signal to the machine base control device 90. The machine control device 90 that has received the doffing request signal sends a signal to the doffing device 60, and the doffing device 60 responds to this signal and immediately above the yarn winding unit 10 in which the package 30 is full. Drive to the position and stop. Then, the doffing device 60 operates the cradle 23 with the cradle release arm 63 to remove the full package 30 from the cradle 23. The removed package 30 moves to a conveyor (not shown) arranged behind the yarn winding unit 10 and is sent to the next process.

  Next, the unit controller 51 rotates the lower thread catching member 25 upward as indicated by the thick arrow in FIG. 5, and the lower thread catching member 25 is stopped at the position (delivery position) indicated by the chain line in FIG. Let

  Next, the doffing device 60 operates to extend the air cylinder of the yarn drawing arm 62, and lowers the tip of the yarn drawing arm 62 to the vicinity of the tip of the lower yarn catching member 25 at the delivery position (FIG. 6). See). The yarn drawing arm 62 catches the yarn 20 in the vicinity of the lower yarn catching member 25. When the yarn 20 is transferred from the lower yarn catching member 25 to the yarn withdrawal arm 62 in this way, the doffing device 60 operates to retract the air cylinder of the yarn withdrawal arm 62, thereby further pulling the yarn 20 upward. .

  Here, the gripping portion 64 grips the take-up tube 22 stored in the bobbin stocker 38 and supplies it to the cradle 23. At this time, the position of the yarn 20 captured by the yarn drawing arm 62 is adjusted so as to be sandwiched between the end of the winding tube 22 and the cradle 23. Thereafter, the doffing device 60 instructs the yarn winding unit 10 to rotate the package 30 at a low speed to form a bunch winding. Thereafter, the package drive control unit 42 further accelerates the rotation of the package 30, and the traverse drive control unit 78 starts driving the traverse guide 74. When the traverse guide 74 captures the yarn 20 and performs traverse, the winding of the yarn 20 around the package 30 can be started.

  Next, the control of the rotational speed of the package 30 after the yarn splicing described above and after the bunch winding by the doffing device 60 will be described with reference to FIG. The traverse speed becomes zero at the end of the traverse width and becomes the highest speed at the center of the traverse width or in the vicinity thereof (central region). The graphs of FIG. 7 and FIG. Is not shown.

  As pointed out as a problem in the prior art, conventionally, there is a possibility that the yarn breakage may occur because the traverse speed when capturing the yarn 20 may be high. On the other hand, in this embodiment, the traverse speed when capturing the yarn 20 is set to a predetermined speed by properly using two accelerations (first acceleration and second acceleration, first acceleration> second acceleration) depending on the situation. (For example, a speed at which yarn breakage does not occur) or less. This will be specifically described below.

  As described above, the control unit 50 (package drive control unit 42) does not rotate the package 30 during yarn splicing. Then, after the piecing, the package 30 and the traverse device 70 are started to be driven substantially simultaneously (that is, the winding of the yarn 20 is started when the package 30 is stopped).

In this case, the control unit 50 performs control so that the rotational speed of the package 30 (that is, the traverse speed of the traverse device 70) is accelerated by the first acceleration. Although the first acceleration is relatively large, the package 30 is accelerated from a stopped state, the traverse speed of the traverse device 70 in the yarn catching timing (after the time t _a) is not too fast. Thereafter, when the package 30 reaches a predetermined rotation speed, the control unit 50 rotates the package 30 at a constant speed.

  Further, the control unit 50 (package drive control unit 42) rotates the package 30 at a low speed during the bunch winding, and further accelerates the rotation speed of the package 30 after the bunch winding is completed. That is, after the bunch winding, the winding of the yarn 20 is started when the package 30 is in the rotating state.

In this case, the control unit 50 performs control so that the rotational speed of the package 30 (that is, the traverse speed of the traverse device 70) is accelerated by the second acceleration. Since the second acceleration is relatively small, even if the package 30 is accelerated from the rotation state, the traverse speed of the traverse device 70 in the yarn catching timing (after the time t _a) is not too fast. Thereafter, when the package 30 reaches a predetermined rotation speed, the control unit 50 rotates the package 30 at a constant speed. In addition, in order to make the package 30 reach a predetermined rotational speed quickly, the acceleration of the rotational speed of the package 30 can be increased after the yarn catching timing has elapsed.

  By performing the above control, the traverse speed when the yarn 20 is captured can be suppressed. Therefore, the yarn breakage due to the contact between the traverse device 70 (specifically, the yarn guide portion of the traverse guide 74) and the yarn 20 is ensured. Can be prevented.

  Note that the unit control unit 51 can arbitrarily determine the method after yarn joining and after bunch winding. For example, since the unit control unit 51 knows that the yarn splicing or bunch winding (doffing) has been performed, it can be determined using the information. Alternatively, the determination may be made based on the rotational speed of the package 30 at the start of winding of the yarn 20 (or immediately before driving the traverse device 70).

  In addition, as described above, the operator operates the setting unit 55 or the machine base setting unit 91 to perform the package 30 after yarn joining (when the winding of the yarn 20 is started after the package 30 is stopped). (That is, the acceleration set in the traverse device 70) and the acceleration set in the package 30 (that is, the traverse device 70) after the bunch winding (when the winding of the yarn 20 is started from the time when the package 30 is rotated). Can be directed. For example, when the yarn 20 is thin, the yarn breakage can be reliably prevented by setting a relatively low acceleration.

  Next, a modification of the above embodiment will be described with reference to FIG. FIGS. 8A and 8B show changes in the rotational speed of the package 30 after the bunch winding by the doffing device 60 and the traverse speed of the traverse device 70.

  In the example shown in FIG. 8A, the controller 50 rotates the package 30 at a relatively large acceleration (the first acceleration) (that is, the traverse device 70) even after the bunch winding by the doffing device 60. (Traverse speed) is accelerated. Instead, the control unit 50 suppresses the traverse speed when capturing the yarn 20 by advancing the yarn capturing timing. Thereby, yarn breakage due to contact between the traverse device 70 and the yarn 20 can be prevented. The adjustment of the yarn catching timing and the adjustment of the acceleration of the traverse speed of the traverse device 70 can be performed simultaneously.

  In the example illustrated in FIG. 8B, the control unit 50 does not synchronize the rotational speed of the package 30 and the traverse speed until at least the traverse device 70 captures the yarn 20. That is, the acceleration is set (adjusted) so that the traverse speed of the traverse device 70 does not follow the rotational speed of the package 30. Thereby, since it is possible to prevent the traverse speed of the traverse device 70 from accelerating rapidly, the traverse speed when the yarn 20 is captured can be suppressed.

  As described above, the yarn winding unit 10 of this embodiment includes the winding unit 18 and the control unit 50. The winding unit 18 winds the yarn 20 around the winding tube 22 to form a package 30. The control unit 50 controls the winding unit 18. The winding unit 18 includes a cradle 23, a contact roller 29, and a traverse device 70. The cradle 23 supports the winding tube 22. The contact roller 29 rotates in contact with the winding tube 22 or the package 30. The traverse device 70 is provided independently of the contact roller 29 and traverses the yarn 20 wound around the winding tube 22. The control unit 50 controls the winding unit 18 so that the traverse speed of the traverse device 70 when starting the winding of the yarn 20 is equal to or lower than a predetermined speed.

  As a result, the traverse speed of the traverse device 70 when capturing the yarn 20 can be reduced to a predetermined speed or less, so that the traverse device 70 (specifically, the traverse guide 74) contacts the yarn 20 at a high speed and breaks the yarn. Can be prevented.

  Further, the yarn winding unit 10 of the present embodiment includes a storage unit 54 that stores at least the first acceleration and the second acceleration that is smaller than the first acceleration. The control unit 50 controls the traverse speed of the traverse device 70 when starting the winding of the yarn 20 from the time when the package 30 is stopped to be accelerated at the first acceleration, and the yarn from when the package 30 is in the rotating state. The traverse speed of the traverse device 70 when starting the winding of 20 is controlled to be accelerated at the second acceleration.

  Thereby, yarn breakage due to contact between the traverse device 70 (specifically, the traverse guide 74) and the yarn 20 can be prevented by a simple process of using two accelerations properly.

  The automatic winder 1 according to the present embodiment includes a doffing device 60, a yarn joining device 14, and an upper yarn catching member 26. The doffing device 60 forms a bunch winding around the winding tube 22 supplied to the winding unit 18. The yarn joining device 14 joins the guided yarn 20. The upper yarn catching member 26 guides the yarn end on the package 30 side to the yarn joining device 14. The controller 50 drives the traverse speed of the traverse device 70 at the second acceleration after the bunch winding is formed by the doffing device 60, and sets the traverse speed of the traverse device 70 at the first acceleration after the yarn splicing by the yarn joining device 14. Control to drive.

  Accordingly, the rotational speed of the package 30 is faster after the formation of the bunch winding than after the splicing. Therefore, by performing the above-described control, the traverse speed of the traverse device 70 when the yarn 20 is captured can be suppressed and the yarn can be controlled. Cutting can be prevented.

  The preferred embodiments and modifications of the present invention have been described above, but the above configuration can be modified as follows, for example.

  In the above-described embodiment, the traverse speed of the traverse device 70 is different between after the yarn splicing and after the bunch winding by the doffing device 60, but the traverse device 70 when starting winding of the yarn 20 is started. Any configuration that controls the winding unit 18 so that the traverse speed is equal to or lower than a predetermined speed falls within the scope of the present invention. For example, as shown in FIG. 9, when the bunch winding is manually formed, the winding of the package 30 is started at a relatively large acceleration (for example, the first acceleration) because the winding is usually started after the package 30 is stopped. Even if the rotational speed is accelerated, the occurrence of yarn breakage can be prevented.

  The change mode of the acceleration (speed) of the rotation speed of the package 30 (the traverse speed of the traverse device 70) is arbitrary. For example, the speed can be changed in a curve or the acceleration can be switched in stages.

  If the configuration is such that the acceleration of the traverse speed of the traverse device 70 is substantially adjusted, the traverse speed of the traverse device 70 is directly controlled without always synchronizing the traverse speed of the traverse device 70 with the rotational speed of the package 30. It may be a configuration.

  The motor used for the package drive motor 41 is arbitrary, and for example, a servo motor or a step motor can be used. Further, the contact roller 29 may be driven by an appropriate driving device so that the package 30 is driven to rotate. Further, the motor used for the traverse drive motor 76 is arbitrary, and a voice coil motor can be used in addition to the above-described motor.

  In the above-described embodiment, the traverse device 70 reciprocates in a substantially horizontal plane with respect to the installation surface of the yarn winding unit 10, but instead, for example, as in Patent Document 1 (Japanese Patent Application Laid-Open No. 2009-227412), A configuration in which the longitudinal direction of the traverse device is substantially perpendicular to the installation surface of the yarn winding unit may be employed.

  Further, instead of the arm-type traverse device 70, a configuration in which a belt-type or rod-type traverse device is adopted may be employed.

  In the above embodiment, the doffing device 60 performs the doffing, the supply of the take-up tube 22 and the bunch winding. However, the respective operations may be performed by separate devices.

  In the above-described embodiment, a cheese-shaped package has been described as an example. However, the present invention can be applied to, for example, a package having a tapered end surface or a cone-shaped package.

  The present invention can be applied not only to an automatic winder but also to other yarn winding machines such as a winding machine and a spinning machine (for example, an air spinning machine and an open-end spinning machine).

1 Automatic winder (yarn winding machine)
10 Thread winding unit 18 Winding unit 22 Winding tube 23 Cradle (winding tube support unit)
29 Contact roller 30 Package 41 Package drive motor (second drive unit)
42 package drive control unit 50 control unit 51 unit control unit 60 doffing device (winding tube supply device, bunch winding device)
70 Traverse Device 74 Traverse Guide 76 Traverse Drive Motor (First Drive Unit)
78 Traverse drive controller

Claims (8)

A winding unit for winding a thread around a winding tube to form a package;
A control unit for controlling the winding unit;
With
The winding unit is
A take-up tube support part for supporting the take-up tube;
A contact roller that rotates in contact with the winding tube or the package;
A traverse device that is provided independently of the contact roller and that traverses the yarn wound around the winding tube;
With
The yarn winding unit, wherein the control unit controls the winding unit so that a traverse speed of the traverse device when starting the winding of the yarn becomes a predetermined speed or less. The yarn winding unit according to claim 1,
A storage unit that stores at least the first acceleration and the second acceleration that is smaller than the first acceleration;
The control unit controls the winding unit to accelerate the traverse speed of the traverse device at the first acceleration when starting the winding of the yarn from when the winding tube or the package is stopped. And controlling the winding unit so as to accelerate the traverse speed of the traverse device when starting the winding of the yarn from the time when the winding tube or the package is in a rotating state with the second acceleration. Characteristic yarn winding unit. The yarn winding unit according to claim 1 or 2,
The yarn winding unit, wherein the control unit is configured to control a traverse speed of the traverse device so as to correspond to a rotation speed of the winding tube or the package. A yarn winding unit according to any one of claims 1 to 3,
The traverse device includes a traverse guide that engages with a yarn and traverses the yarn, and a first drive unit that reciprocates the traverse guide,
A yarn winding unit comprising a second driving unit provided independently of the first driving unit to rotationally drive the winding tube or the package.   A yarn winding machine comprising a plurality of the yarn winding units according to any one of claims 1 to 4. A yarn winding machine according to claim 5,
A yarn winding machine, comprising: a setting unit that sets an acceleration of a traverse speed of the traverse device when starting the winding of the yarn. The yarn winding machine according to claim 5 or 6,
A yarn winding machine comprising a winding tube supply device that supplies the winding tube to at least one of the winding units of the plurality of yarn winding units. The yarn winding machine according to claim 7,
A bunch winding device for forming a bunch winding on the winding tube supplied to the winding unit by the winding tube supply device;
A yarn splicing device for splicing the guided yarn;
A guide member for guiding at least the yarn end on the package side to the yarn joining device;
With
The controller drives the traverse speed of the traverse device at a second acceleration after the bunch winding is formed by the bunch winding device, and sets the traverse speed of the traverse device to the second acceleration after the yarn splicing by the yarn splicing device. A yarn winding machine, wherein the winding unit is controlled so as to be driven at a first acceleration having a lower acceleration than the first winding.

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