CN111132918A

CN111132918A - Yarn winding machine

Info

Publication number: CN111132918A
Application number: CN201880061867.4A
Authority: CN
Inventors: 高安孝治; 花木翔太
Original assignee: Murata Machinery Ltd
Current assignee: Murata Machinery Ltd
Priority date: 2017-09-27
Filing date: 2018-09-03
Publication date: 2020-05-08
Anticipated expiration: 2038-09-03
Also published as: JP2019059601A; WO2019065106A1; EP3689803B1; EP3689803A4; CN111132918B; EP3689803A1

Abstract

A yarn winding unit for winding a yarn around a tapered winding bobbin to form a tapered package, comprising: a cradle that rotatably supports the winding bobbin; a package driving motor mounted on the cradle and rotating the winding bobbin; a traverse device for traversing the yarn; a winding peripheral speed acquisition unit that acquires a peripheral speed of the winding bobbin as a first peripheral speed; a contact roller which is driven to rotate along with the rotation of the winding bobbin; a roller peripheral speed calculating unit for calculating a peripheral speed of the contact roller as a second peripheral speed; and an abutting state determination unit that determines an abutting state of the winding bobbin abutting the touch roller by comparing the first peripheral speed acquired by the winding peripheral speed acquisition unit with the second peripheral speed calculated by the roller peripheral speed calculation unit.

Description

Yarn winding machine

Technical Field

The present invention relates to a yarn winding machine.

Background

For example, patent document 1 describes a yarn winding machine that winds a yarn around a bobbin to form a package. In such a yarn winding machine, an operation of adjusting the shape of the package by pressing the outer peripheral surface of the package against the contact roller is performed.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2014-108844

Disclosure of Invention

Problems to be solved by the invention

Here, for example, in order to adjust the shape of the package, it is necessary to bring the outer peripheral surface of the package into contact with the contact roller in a predetermined contact state. Therefore, in the present technology, it is desirable to determine the contact state of the bobbin or package with the contact roller.

Therefore, the present invention describes a yarn winding machine capable of determining the contact state of a bobbin or package in contact with a touch roller.

Means for solving the problems

The present invention is a yarn winding machine that winds a yarn around a tapered bobbin to form a tapered package, and includes: a cradle which rotatably supports the bobbin by a bobbin holding section which holds the bobbin; a driving part which is installed on the cradle, has a rotating shaft connected with the bobbin holding part in an integrally rotatable manner, and rotates the bobbin by rotating the bobbin holding part; a traverse device that traverses the yarn wound around the bobbin or the package by moving the yarn guide portion on which the yarn is hooked; a package circumferential speed acquisition unit that acquires, as a first circumferential speed, a circumferential speed of the outer circumferential surface of the bobbin or the package at a predetermined position in the rotational axis direction of the bobbin; a contact roller that comes into contact with an outer peripheral surface of the bobbin or the package and is driven to rotate in accordance with rotation of the bobbin or the package; a roller peripheral speed calculating unit for calculating a peripheral speed of the outer peripheral surface of the contact roller as a second peripheral speed; and an abutting state determination unit that determines an abutting state of the bobbin or the package abutting against the touch roller by comparing the first peripheral speed acquired by the package peripheral speed acquisition unit and the second peripheral speed calculated by the roller peripheral speed calculation unit.

Here, when the rotating bobbin or package abuts against the touch roller, the peripheral speed of the touch roller differs between when the outer peripheral surface of the large-diameter-side end of the bobbin or package abuts against the touch roller and when the outer peripheral surface of the small-diameter-side end of the bobbin or package abuts against the touch roller. In this way, even if the rotational speed of the bobbin or the package is constant, the peripheral speed of the touch roller varies depending on the contact portion of the bobbin or the package with the touch roller. Therefore, the contact state determination unit can determine which part of the bobbin or the package is in contact with the contact roller by comparing the first circumferential speed, which is the circumferential speed at a predetermined position on the outer circumferential surface of the bobbin or the package, with the second circumferential speed, which is the circumferential speed of the contact roller. That is, the abutment state determination unit can determine the abutment state of the bobbin or the package. Thus, the yarn winding machine can determine the contact state of the bobbin or package with the contact roller.

The package circumferential speed acquisition unit may calculate the first circumferential speed based on circumferential speed calculation information for calculating the first circumferential speed, which is the circumferential speed of the outer peripheral surface of the bobbin or the package at a predetermined position. In this case, the package circumferential speed acquisition unit can acquire the first circumferential speed, which is the circumferential speed of the outer peripheral surface of the bobbin or the package at a predetermined position, by calculation.

The peripheral speed calculation information may include at least one of a shape of the bobbin, a rotational speed of the bobbin, and a yarn speed of the wound yarn. In this case, the package peripheral speed acquisition unit can accurately calculate the first peripheral speed using these values.

The yarn winding machine may further include: a bobbin information input unit for inputting bobbin information for specifying the shape of a bobbin; and a circumferential velocity information storage unit that stores, for each shape of the bobbin, circumferential velocity information in which the shape of the bobbin corresponds to the circumferential velocity of the outer peripheral surface of the bobbin at a predetermined position, and the winding circumferential velocity acquisition unit acquires, from the circumferential velocity information storage unit, the circumferential velocity corresponding to the shape of the bobbin specified by the bobbin information input to the bobbin information input unit as the first circumferential velocity. In this case, the package peripheral speed acquisition unit can acquire the peripheral speed from the peripheral speed information storage unit without performing calculation.

The yarn winding machine may further include: a report determination unit that determines whether or not the contact state determined by the contact state determination unit is a predetermined contact state to be reported; and a reporting unit configured to report when the contact state of the object to be reported is determined by the reporting determination unit. In this case, the operator of the yarn winding machine can grasp the abutting state of the bobbin or the package based on the report result of the report section. Further, the operator can perform a countermeasure such as adjusting the contact state of the bobbin or the package, or stopping the winding of the yarn.

The yarn winding machine may further include an abutment state input unit that inputs an abutment state of the report target, and the report determination unit may adopt the abutment state of the report target input by the abutment state input unit as a predetermined abutment state of the report target. In this case, the operator of the yarn winding machine can set the contact state of the report target using the contact state input unit. An operator of the yarn winding machine can switch the contact state of the report target according to the type of the wound yarn and the like.

The yarn winding machine may further include a yarn speed detecting section that detects a yarn speed of the yarn wound on the bobbin or the package, and the contact state determining section may determine the contact state based on a temporal change in a difference between the yarn speed detected by the yarn speed detecting section and the second peripheral speed calculated by the peripheral speed calculating section. Here, for example, when the large-diameter side end of the bobbin abuts against the touch roller, the yarn layer (amount of yarn) between the bobbin and the touch roller increases as the yarn is wound. Since the bobbin and the package are tapered and have different peripheral speeds on the large-diameter side and the small-diameter side, the outer peripheral surface of the package and the outer peripheral surface of the contact roller are in contact with each other at one point (contact point). Further, as the number of yarn layers increases, the contact point between the outer peripheral surface of the package and the contact roller moves toward the center position of the outer peripheral surface of the package (the center position in the rotation axis direction). The speed of movement of the abutment point varies according to the speed at which the gap between the bobbin and the contact roller is filled with yarn. That is, for example, a large diameter side end of the bobbin is assumed to be in contact with the contact roller. In this state, when the gap between the bobbin and the contact roller is wide (when the gap between the small-diameter-side end of the bobbin and the outer peripheral surface of the contact roller is wide), the movement of the contact point is slower than when the gap between the bobbin and the contact roller is narrow (when the gap between the small-diameter-side end of the bobbin and the outer peripheral surface of the contact roller is narrow). Further, since the yarn is wound while traversing between the large-diameter side end portion and the small-diameter side end portion of the package, the peripheral speed at the center of the outer peripheral surface of the package is the yarn speed (average traveling speed of the yarn). Therefore, when the contact point moves to the vicinity of the center position of the outer peripheral surface of the package, the peripheral speed of the contact roller is substantially the same as the peripheral speed at the center position of the outer peripheral surface of the package. That is, the peripheral speed of the touch roll is substantially the same as the yarn speed. As the yarn is wound on the bobbin, the peripheral speed of the contact roller converges toward the yarn speed. The speed at which the peripheral speed of the contact roller converges toward the yarn speed varies depending on the size of the gap between the bobbin and the contact roller, that is, the state in which the rotation axis of the bobbin (package) is inclined with respect to the rotation axis of the contact roller. Therefore, the contact state determination unit can determine the state of inclination of the bobbin (package) with respect to the contact roller, that is, the contact state of the package with respect to the contact roller, based on the change with time of the difference between the yarn speed and the second peripheral speed, which is the peripheral speed of the contact roller.

The yarn winding machine may further include a contact state storage unit that stores identification information for identifying the package in association with the contact state determined for the package by the contact state determination unit. In this case, even after the package is formed, the operator of the yarn winding machine or the like can confirm the contact state at the time of winding the yarn by the package based on the information stored in the contact state storage section.

Effects of the invention

According to the present invention, the contact state of the bobbin or package with the contact roller can be determined.

Drawings

Fig. 1 is a front view of an automatic winder including a winder unit according to an embodiment.

Fig. 2 is a schematic diagram and a block diagram showing a schematic structure of the winder unit.

Fig. 3 is a left side view showing an enlarged vicinity of the traverse device of the winder unit.

Fig. 4 (a) is a schematic view showing a state in which the large-diameter side end of the winding bobbin abuts against the contact roller. Fig. 4 (b) is a schematic view showing a state in which the central position of the winding bobbin abuts against the contact roller. Fig. 4 (c) is a schematic view showing a state in which the small-diameter-side end of the winding bobbin abuts against the contact roller.

Fig. 5 (a) is a schematic view showing a state in which the large-diameter side end of the winding bobbin abuts against the contact roller. Fig. 5 (b) is a schematic view showing a state in which the small-diameter-side end of the winding bobbin abuts against the contact roller.

Fig. 6 is a graph showing a change in the peripheral speed of the contact roller with time.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description of the drawings, the same elements are denoted by the same reference numerals, and redundant description is omitted.

An overall configuration of an automatic winder 1 including a winder unit (yarn winding machine) 10 according to the present embodiment will be described with reference to fig. 1. In the present specification, "upstream" and "downstream" mean upstream and downstream in the running direction of the yarn at the time of winding the yarn.

As shown in fig. 1, the automatic winder 1 mainly includes a plurality of winder units 10, an automatic doffing device 80, and a machine body control device 90, which are arranged in parallel. Each winding unit 10 winds the yarn 20 unwound from the yarn supplying bobbin 21 around a winding bobbin 22 (see fig. 2) while traversing the yarn to form a package 30. The traverse means to impart a reciprocating motion to the wound yarn. The package 30 is a cross-wound package.

When the winding unit 10 is full (full bobbin) of the package 30, the automatic doffing device 80 moves to the position of the winding unit 10, discharges the full package 30 from the winding unit 10, and supplies an empty bobbin to the winding unit 10.

The body control device 90 includes a setting unit (bobbin information input unit, contact state input unit) 91, a display unit 92, and a speaker 93. The setting unit 91 can perform setting for each winder unit 10 by an operator inputting a predetermined set value or selecting an appropriate control method. The predetermined set value input to the setting unit 91 by the operator includes bobbin information for specifying the type (shape) of the winding bobbin 22 for winding the yarn 20. The bobbin information is not limited to being determined by the operator directly inputting the type of the winding bobbin 22 to be used. For example, when the type of the winding bobbin 22 to be used is determined according to the type of the yarn 20 to be wound, the bobbin information may be determined according to the type of the yarn 20 input by the operator.

The setting unit 91 receives an input of the contact state of the report target. The contact state of the report target is input by the operator. The setting unit 91 sets the contact state of the report object input by the operator for each winder unit 10. The contact state of the report target will be described later. The display unit 92 is configured to be able to display the winding state of the yarn 20 and the contents of the generated failure in each winder unit 10. The display unit 92 may be formed of a touch panel, and the setting unit 91 may be included in the display unit 92. The speaker 93 gives a report to the operator by outputting a sound based on an instruction from the report instructing unit 55 described later.

Next, the structure of the winder unit 10 will be specifically described with reference to fig. 2. Each winder unit 10 includes, as shown in fig. 2, a winding unit main body 17 and a unit control unit 50 as main components.

The unit control unit 50 is configured to include, for example, a CPU, a RAM, a ROM, an I/O port, and a communication port. The ROM stores programs for controlling the respective configurations of the winding unit main body 17. Each unit (described in detail later) provided in the winding unit main body 17 and the machine body control device 90 are connected to the I/O port and the communication port, and are configured to be able to communicate control information and the like. Thus, the unit control unit 50 can control the operations of the respective units provided in the winding unit main body 17.

The winding unit main body 17 includes, in order from the yarn feeding bobbin 21 side, a yarn unwinding assisting device 12, a tension applying device 13, a splicing device 14, an electro-optical type fixed length device (yarn speed detecting unit) 15, and a yarn monitoring device 16 in a yarn running path between the yarn feeding bobbin 21 and the contact roller 29. A yarn feeder 11 is provided at a lower portion of the winding unit main body 17. The yarn feeding unit 11 is configured to be able to hold a yarn feeding bobbin 21 conveyed by a bobbin conveying system, not shown, at a predetermined position.

The yarn unwinding assisting device 12 assists unwinding of the yarn 20 from the yarn feeding bobbin 21 by lowering the regulating member 40 covering the core tube of the yarn feeding bobbin 21 in conjunction with unwinding of the yarn 20 from the yarn feeding bobbin 21. The regulating member 40 is in contact with the balloon of the yarn 20 formed on the upper portion of the yarn feeding bobbin 21 by the rotation of the yarn 20 unwound from the yarn feeding bobbin 21 and the centrifugal force, and assists the unwinding of the yarn 20 by controlling the balloon of the yarn 20 to an appropriate size. A sensor, not shown, for detecting the tapered surface portion of the yarn feeding bobbin 21 is provided near the regulating member 40. When the sensor detects the lowering of the tapered surface portion, the yarn unwinding assisting device 12 lowers the regulating member 40 by, for example, an air cylinder (not shown) following the lowering of the tapered surface portion.

The tension applying device 13 applies a predetermined tension to the advancing yarn 20. As the tension applying device 13, for example, a fence type device in which movable comb teeth are arranged with respect to fixed comb teeth can be used. The movable comb teeth are rotated by a rotary solenoid to be brought into an engaged state or a released state with respect to the fixed comb teeth. In addition to the aforementioned fence type device, the tension applying device 13 may be a disk type device, for example.

The yarn splicing device 14 splices the lower yarn from the yarn feeding bobbin 21 and the upper yarn from the package 30 when the yarn monitoring device 16 detects a yarn defect and cuts the yarn, or when the yarn is broken during unwinding from the yarn feeding bobbin 21. As such a yarn splicing device for splicing an upper yarn and a lower yarn, a mechanical knotter, a splicer using a fluid such as compressed air, or the like can be used.

The photoelectric type yarn length determining device 15 is a non-contact photoelectric type yarn length determining device, and detects the yarn speed, which is the traveling speed of the yarn 20, so as not to contact the yarn 20. Specifically, the photoelectric type yarn fixing device 15 projects the yarn 20 onto a light receiving element, and detects the yarn speed of the yarn 20 wound around the winding bobbin (bobbin) 22 or the package 30 by processing a change in photocurrent generated when the projected yarn 20 travels using a so-called spatial filter principle.

The yarn monitoring device 16 includes: a head 49 on which a sensor, not shown, for detecting the thickness of the yarn 20 is disposed; and an analyzer 58 that processes the yarn thickness signal from the sensor. The analyzer 58 is provided in the cell control section 50. The yarn monitoring device 16 detects a yarn defect such as a slub yarn by monitoring a yarn thickness signal from the sensor. A cutter 39 for immediately cutting the yarn 20 when the yarn monitor 16 detects a yarn defect is provided near the head 49.

A lower yarn catching member 25 for catching a yarn end of the lower yarn and guiding the yarn end to the piecing device 14 is provided below the piecing device 14. An upper yarn catching member 26 for catching a yarn end of the upper yarn and guiding the yarn end to the piecing device 14 is provided on the upper side of the piecing device 14. The lower yarn catching member 25 includes: a lower yarn bobbin arm 33; and a lower yarn suction port 32 formed at the tip of the lower yarn tubular arm 33. The upper yarn catching member 26 includes: an upper yarn bobbin arm 36; and an upper yarn suction port 35 formed at the front end of the upper yarn bobbin arm 36.

The lower bobbin arm 33 and the upper bobbin arm 36 are configured to be rotatable about a shaft 34 and a shaft 37, respectively. A suitable negative pressure source is connected to the lower yarn duct arm 33 and the upper yarn duct arm 36, respectively. The lower yarn guide arm 33 is configured to generate suction flow at the lower yarn suction port 32, and to be able to suck and catch the yarn end of the lower yarn. The upper yarn guide arm 36 is configured to generate suction flow at the upper yarn suction port 35, and to be able to suck and catch the yarn end of the upper yarn. The lower yarn bobbin arm 33 and the upper yarn bobbin arm 36 are provided with opening and closing portions (not shown) on their base end sides, respectively. Each opening/closing unit opens and closes in response to a signal from the unit control unit 50. This controls the stop and generation of the suction flow from the lower yarn suction port 32 and the upper yarn suction port 35.

The winding unit main body 17 further includes: a cradle 23 that supports the winding bobbin 22 so as to be detachable and rotatable; and a contact roller 29 that is rotatable in contact with the outer peripheral surface of the winding bobbin 22 or the outer peripheral surface of the package 30. The winding bobbin 22 has a tapered (conical) shape with different diameters at both ends. The winding unit main body 17 includes an arm-type traverse device 70 for traversing the yarn 20 in the vicinity of the cradle 23, and winds the yarn 20 around the winding bobbin 22 or the package 30 while traversing the yarn 20 by the traverse device 70. A guide plate 28 is provided slightly upstream of the traverse position. The guide plate 28 guides the yarn 20 on the upstream side to the traverse position. A ceramic traverse supporting point portion 27 is provided on the upstream side of the guide plate 28. The traverse device 70 traverses the yarn 20 in the direction indicated by the arrow in fig. 2 with the traverse supporting point portion 27 as a supporting point.

The winding unit main body 17 winds the yarn 20 around the tapered winding bobbin 22 while traversing the yarn 20 by the traverse device 70, thereby forming the tapered package 30.

Specifically, as shown in fig. 2 and 3, the traverse device 70 includes a traverse drive motor 76, an output shaft 77, and a traverse arm 74. Fig. 3 is a view as viewed in the axial direction of the contact roller 29. The rotation in the winding direction of the package 30 is clockwise in fig. 3, and the rotation in the reverse winding direction of the package 30 is counterclockwise in fig. 3.

The traverse driving motor 76 is a motor that drives the traverse arm 74, and is constituted by a servo motor or the like. The operation of the traverse drive motor 76 is controlled by the unit control section 50. The traverse driving motor 76 may be another motor such as a stepping motor or a voice coil motor. A yarn guide 73 having a hook shape for hooking the yarn 20 is formed at the tip of the traverse arm 74, for example. The traverse arm 74 can guide the yarn 20 by the yarn guide 73. The traverse device 70 can traverse the yarn 20 wound around the package 30 by reciprocating and rotating the traverse arm 74 (moving the yarn guide 73) while the yarn guide 73 guides the yarn 20.

The power of the traverse drive motor 76 is transmitted to the base end of the traverse arm 74 via the output shaft 77. The traverse arm 74 performs reciprocating turning motion in a direction perpendicular to the paper surface of fig. 3 (the left-right direction of fig. 2 (the winding width direction of the package 30)) by the forward and reverse rotation of the rotor of the traverse drive motor 76. In addition, the traverse arm 74 in fig. 3 shows the position at the end of the traverse.

The contact roller 29 abuts on the outer peripheral surface of the winding bobbin 22 or the package 30 and is driven to rotate in accordance with the rotation of the winding bobbin 22 or the package 30. The touch roller 29 has a cylindrical shape with the same diameter at both ends. The outer peripheral surface of the package 30 is pressed against the contact roller 29. The contact roller 29 has a function of adjusting the shape of the package 30. The contact roller 29 has a function of winding the traverse yarn 20 around the package 30 while maintaining the traverse position. The contact roller 29 is provided with a rotation speed sensor 31 that detects the rotation speed of the contact roller 29. The rotation speed sensor 31 transmits a rotation detection signal corresponding to the rotation speed of the contact roller 29 to the unit control portion 50. As the rotation speed sensor 31, various sensors such as a sensor for measuring a change in magnetic force of a magnet attached to the contact roller 29 can be used.

The cradle 23 has: a pair of first and

second rocker arms

23a and 23 b; and a coupling portion 23c that couples the base end portion of the first rocker arm 23a and the base end portion of the second rocker arm 23 b. The cradle 23 is configured to be rotatable about a rotation shaft 48 provided in the connection portion 23 c. The cradle 23 rotates to absorb an increase in the diameter of the package 30 accompanying the winding of the yarn 20 onto the winding bobbin 22.

A first bobbin holding portion (bobbin holding portion) B1 that holds one end of the winding bobbin 22 is provided at the front end of the first rocker arm 23 a. A second bobbin holding portion B2 that holds the other end of the winding bobbin 22 is provided at the tip end of the second rocker arm 23B. A package driving motor (driving unit) 41, which is a servomotor, is attached to the distal end of the first cradle arm 23 a. The package driving motor 41 rotationally drives the winding bobbin 22 held by the first bobbin holding section B1 and the second bobbin holding section B2 to wind the yarn 20 around the winding bobbin 22. The package driving motor 41 can rotationally drive the package 30 by normal rotation for rotating the package 30 (the winding bobbin 22) in the winding direction and reverse rotation for rotating the package 30 in a reverse winding direction, which is a direction opposite to the winding direction. The motor shaft (rotation shaft) of the package drive motor 41 is connected to the first bobbin holding section B1 that holds the winding bobbin 22 so as to be integrally rotatable. The package drive motor 41 rotates the winding bobbin 22 by rotating the first bobbin holding section B1 (so-called direct drive method).

The operation of the package driving motor 41 is controlled by the unit control section 50. The package driving motor 41 is not limited to a servo motor, and various motors such as a stepping motor and an induction motor can be used. The package driving motor 41 is provided with a rotation speed sensor 24 that detects the rotation speed of the motor shaft of the package driving motor 41. The rotation speed sensor 24 transmits a rotation detection signal corresponding to the rotation speed of the motor shaft to the unit control unit 50.

The unit control section 50 includes, in addition to the analyzer 58 described above, a package peripheral speed acquisition section 51, a roller peripheral speed calculation section 52, a contact state determination section 53, a report determination section 54, a report instruction section 55, a storage section (peripheral speed information storage section, contact state storage section) 56, and a package drive control section 57.

The package circumferential speed obtaining section 51 obtains a circumferential speed (first circumferential speed) of the outer circumferential surface of the winding bobbin 22 at a predetermined position in the rotation axis direction of the winding bobbin 22 when the winding of the yarn 20 is started. The start of winding the yarn 20 is: the yarn 20 is not accumulated between the winding bobbin 22 and the contact roller 29, and the outer peripheral surface of the winding bobbin 22 is in contact with the contact roller 29. When the package drive motor 41 is attached to the cradle 23, a slight gap (predetermined gap) may be provided between the outer peripheral surface of the winding bobbin 22 and the outer peripheral surface of the contact roller 29 when the winding of the yarn 20 is started.

The package peripheral speed obtaining section 51 obtains the peripheral speed (first peripheral speed) of the outer peripheral surface of the package 30 at a predetermined position in the rotation axis direction of the package 30 after the start of winding of the yarn 20. Further, the start of winding the yarn 20 means: the yarn 20 is wound around the winding bobbin 22, and the yarn 20 wound around the winding bobbin 22 is in contact with the contact roller 29, that is, the package 30 is in contact with the contact roller 29.

In the present embodiment, the package circumferential speed obtaining section 51 obtains the circumferential speeds of the outer circumferential surfaces of the winding bobbin 22 and the package 30 at the center positions in the rotation axis direction, respectively, as the circumferential speeds at predetermined positions in the rotation axis direction. The package peripheral speed obtaining section 51 can obtain the peripheral speeds of the outer peripheral surfaces at the center positions in the rotation axis direction of the winding bobbin 22 and the package 30, respectively, based on a known method.

For example, the package peripheral speed acquisition unit 51 may derive the peripheral speed by calculation based on peripheral speed calculation information for calculating the peripheral speed of the outer peripheral surface of the winding bobbin 22 or the package 30 at a predetermined position. The circumferential velocity calculation information includes, for example, at least one of the shape of the winding bobbin 22, the rotational velocity of the winding bobbin 22, and the yarn velocity of the wound yarn 20. The shape of the winding bobbin 22 may include, for example, the size of the diameter of the large-diameter end of the winding bobbin 22, the length in the direction of the rotation axis, the angle of inclination of the outer peripheral surface with respect to the rotation axis, and the like. The shape of the winding bobbin 22 may include, for example, the diameter of the winding bobbin 22 at the center in the rotation axis direction. The shape of the winding bobbin 22 is stored in the storage unit 56 in advance for each type of the winding bobbin 22. The winding peripheral speed obtaining section 51 can determine the type of the winding bobbin 22 to be used, based on the bobbin information input to the setting section 91. The winding peripheral speed obtaining section 51 can obtain the shape of the winding bobbin 22 corresponding to the specified type from the storage section 56. As the rotation speed of the winding bobbin 22, the detection result of the rotation speed sensor 24 can be used. As the yarn speed of the wound yarn, the detection result of the photoelectric type fixed length device 15 can be used.

For example, the package circumferential speed acquisition unit 51 can calculate the circumferential speed of the outer circumferential surface at the center position in the rotation axis direction of the winding bobbin 22 based on the shape of the winding bobbin 22 and the rotation speed detected by the rotation speed sensor 24 when the yarn starts to be wound. Specifically, the winding peripheral speed obtaining section 51 can calculate the peripheral speed of the outer peripheral surface of the winding bobbin 22 at the center position in the rotation axis direction based on the diameter of the winding bobbin 22 at the center position in the rotation axis direction obtained from the shape of the winding bobbin 22 and the rotation speed detected by the rotation speed sensor 24.

For example, the package peripheral speed acquisition unit 51 calculates the diameter of the package 30 at the center position in the rotation axis direction based on the yarn speed detected by the photoelectric type yarn fixing device 15 and the rotation speed detected by the rotation speed sensor 24 after the start of winding the yarn. Further, the package peripheral speed obtaining section 51 may calculate the peripheral speed of the outer peripheral surface at the center position of the package 30 based on the calculated diameter of the package 30. As another example, the package peripheral speed acquiring unit 51 may use the yarn speed of the yarn 20 detected by the photoelectric type yarn fixing device 15 as the peripheral speed of the outer peripheral surface at the center position in the rotation axis direction of the package 30 after the start of winding of the yarn. In the present embodiment, the package 30 is tapered, and the photoelectric length-determining device 15 detects the average yarn speed of the yarn 20 traversed by the traverse device 70. Therefore, the yarn speed of the yarn 20 detected by the photoelectric type yarn fixing device 15 is the peripheral speed of the outer peripheral surface at the central position in the rotation axis direction of the package 30.

The winding peripheral speed obtaining section 51 may obtain the peripheral speed of the outer peripheral surface of the winding bobbin 22 at a predetermined position without performing calculation using the peripheral speed calculation information. Here, the storage unit 56 may store, for each shape of the winding bobbin 22, circumferential velocity information in which the shape of the winding bobbin 22 is associated with the circumferential velocity of the outer circumferential surface of the winding bobbin 22 at a predetermined position. In this case, the winding peripheral speed acquisition unit 51 can acquire the peripheral speed corresponding to the shape of the bobbin specified by the bobbin information input to the setting unit 91 from the storage unit 56.

Hereinafter, the peripheral speed of the outer peripheral surface at the center position in the rotation axis direction of the winding bobbin 22 and the peripheral speed of the outer peripheral surface at the center position in the rotation axis direction of the package 30 are collectively referred to as a "package center diameter peripheral speed (first peripheral speed)".

The package drive control unit 57 controls the rotational speed of the package drive motor 41 so that the yarn speed of the yarn 20 wound by the winding bobbin 22 or the package 30 becomes a predetermined yarn speed. For example, the package drive control unit 57 can calculate the rotation speed of the package drive motor 41 for realizing a predetermined yarn speed based on the diameter of the winding bobbin 22 or the package 30 at the center position in the rotation axis direction. The package drive control unit 57 can calculate the diameter of the winding bobbin 22 or the package 30 at the center position in the rotation axis direction based on a known method.

For example, the package drive control unit 57 may calculate the shape of the winding bobbin 22 preset by the package peripheral speed acquisition unit 51 based on specific information as the diameter of the winding bobbin 22 at the center position in the rotation axis direction at the start of winding the yarn 20. For example, the package drive control unit 57 may calculate the diameter of the package 30 based on the yarn speed detected by the photoelectric type yarn fixing device 15 and the rotation speed detected by the rotation speed sensor 24 after the start of winding the yarn 20. When the diameter of the package 30 is calculated using the yarn speed detected by the photoelectric type yarn fixing device 15, the package drive control unit 57 can perform control (i.e., feedback control) for adjusting the rotation speed of the package drive motor 41 based on the actual yarn speed of the yarn 20.

The roller peripheral speed calculating unit 52 calculates a peripheral speed (second peripheral speed) of the outer peripheral surface of the contact roller 29. For example, the roller peripheral speed calculating unit 52 can calculate the peripheral speed of the outer peripheral surface of the roller peripheral speed calculating unit 52 based on the size of the diameter of the contact roller 29 and the rotation speed detected by the rotation speed sensor 31. The diameter of the contact roller 29 is set in advance in the roller peripheral speed calculating section 52. Hereinafter, the peripheral speed of the outer peripheral surface of the contact roller 29 is referred to as "contact roller peripheral speed (second peripheral speed)".

The contact state determination unit 53 determines the contact state of the winding bobbin 22 or the package 30 that is in contact with the contact roller 29 by comparing the package center diameter peripheral speed acquired by the package peripheral speed acquisition unit 51 with the contact roller peripheral speed calculated by the roller peripheral speed calculation unit 52. Here, the contact state determination unit 53 determines: in the contact state, the large-diameter side end portion of the winding bobbin 22 or the package 30 is in contact with the contact roller 29, the small-diameter side end portion is in contact with the contact roller 29, or the center position between the large-diameter side end portion and the small-diameter side end portion is in contact with the contact roller 29.

Here, when the rotating winding bobbin 22 or package 30 abuts against the contact roller 29, the contact roller peripheral speed differs between when the outer peripheral surface of the large-diameter-side end portion of the winding bobbin 22 or package 30 abuts against the contact roller 29 and when the outer peripheral surface of the small-diameter-side end portion of the winding bobbin 22 or package 30 abuts against the contact roller 29. In this way, even if the rotational speed of the winding bobbin 22 or the package 30 is constant, the contact roller peripheral speed varies depending on the contact portion of the winding bobbin 22 or the package 30 with which the contact roller 29 is in contact. Therefore, the contact state determination unit 53 can determine which portion of the winding bobbin 22 or the contact roller 29 is in contact with the contact roller, that is, the contact state of the winding bobbin 22 or the package 30, by comparing the package center diameter peripheral speed with the contact roller peripheral speed.

Specifically, when the touch roller peripheral speed and the package center diameter peripheral speed satisfy the following expression (1) at the start of winding the yarn 20, the contact state determination unit 53 determines that the large diameter side end portion 22a of the winding bobbin 22 is in contact with the touch roller 29 as shown in fig. 4 (a). Similarly, when the contact roller peripheral speed and the package center diameter peripheral speed satisfy the following expression (1) after the start of winding the yarn 20, the contact state determination unit 53 determines that the large diameter side end of the package 30 is in contact with the contact roller 29.

Contact roll peripheral speed/package central diameter peripheral speed > 1 … (1)

When the touch roller peripheral speed and the package center diameter peripheral speed satisfy the following expression (2) at the start of winding the yarn 20, the contact state determination unit 53 determines that the outer peripheral surface at the center position in the rotation axis direction of the winding bobbin 22 is in contact with the touch roller 29, as shown in fig. 4 (b). Similarly, when the contact roller peripheral speed and the package center diameter peripheral speed satisfy the following expression (2) after the start of winding the yarn 20, the contact state determination unit 53 determines that the contact roller 29 is in contact with the outer peripheral surface at the center position in the rotation axis direction of the package 30.

Contact roll peripheral speed/package center diameter peripheral speed 1 … (2)

When the touch roller peripheral speed and the package center diameter peripheral speed satisfy the following expression (3) at the start of winding the yarn 20, the contact state determination unit 53 determines that the small-diameter-side end 22b of the winding bobbin 22 is in contact with the touch roller 29, as shown in fig. 4 (c). Similarly, when the touch roller peripheral speed and the package center diameter peripheral speed satisfy the following expression (3) after the start of winding the yarn 20, the contact state determination unit 53 determines that the end on the smaller-diameter side of the package 30 is in contact with the touch roller 29.

Contact roller peripheral speed/package central diameter peripheral speed < 1 … (3)

The contact state determination unit 53 also determines the contact state based on a change with time of the difference between the yarn speed of the yarn 20 detected by the photoelectric type fixed length device 15 and the contact roller peripheral speed calculated by the roller peripheral speed calculation unit 52. Here, the contact state determination unit 53 determines whether the gap between the small-diameter side end portion and the contact roller 29 is wide or narrow as the contact state in a state where the large-diameter side end portion of the package 30 is in contact with the contact roller 29. Similarly, the contact state determination unit 53 determines whether the gap between the large diameter side end and the contact roller 29 is wide or narrow as the contact state in the state where the small diameter side end of the package 30 is in contact with the contact roller 29.

Here, for example, as shown in fig. 5, when the large diameter side end 22a of the winding bobbin 22 abuts against the touch roller 29, the layer (amount of yarn) of the yarn 20 between the winding bobbin 22 and the touch roller 29 increases as the yarn 20 is wound. Since the winding bobbin 22 and the package 30 are tapered and have different peripheral speeds on the larger diameter side and the smaller diameter side, the outer peripheral surface of the package 30 and the outer peripheral surface of the contact roller 29 contact each other at one point (contact point). Further, as the layer of the yarn 20 increases, the contact point between the outer peripheral surface of the package 30 and the contact roller 29 moves toward the center position of the outer peripheral surface of the package 30 (the center position in the rotation axis direction). The speed of the movement of the contact point varies depending on the speed at which the gap between the winding bobbin 22 and the contact roller 29 is filled with the yarn.

That is, for example, the large-diameter side end 22a of the winding bobbin 22 is assumed to be in contact with the contact roller 29. In this state, when the gap between the winding bobbin 22 and the contact roller 29 is wide (when the gap between the small-diameter-side end 22b of the winding bobbin 22 and the outer peripheral surface of the contact roller 29 is wide), the movement of the contact point is slower than when the gap between the winding bobbin 22 and the contact roller 29 is narrow (when the gap between the small-diameter-side end 22b and the outer peripheral surface of the contact roller 29 is narrow). Specifically, when the gap between the winding bobbin 22 and the contact roller 29 is wide as shown in fig. 5 (a), the speed at which the gap is filled with the yarn 20 is slow, and therefore the movement of the contact point is slow, as compared with the case where the gap between the winding bobbin 22 and the contact roller 29 is narrow as shown in fig. 4 (a).

Similarly, the small-diameter-side end 22b of the winding bobbin 22 is assumed to be in contact with the contact roller 29. In this state, when the gap between the winding bobbin 22 and the contact roller 29 is wide (when the gap between the large-diameter side end 22a of the winding bobbin 22 and the outer peripheral surface of the contact roller 29 is wide), the movement of the contact point is slower than when the gap between the winding bobbin 22 and the contact roller 29 is narrow (when the gap between the large-diameter side end 22a and the outer peripheral surface of the contact roller 29 is narrow). Specifically, when the gap between the winding bobbin 22 and the contact roller 29 is wide as shown in fig. 5 (b), the speed at which the gap is filled with the yarn 20 is slow, and therefore the movement of the contact point is slow, as compared with the case where the gap between the winding bobbin 22 and the contact roller 29 is narrow as shown in fig. 4 (c).

Since the yarn 20 is wound while traversing between the large-diameter side end portion and the small-diameter side end portion of the package 30, the package center diameter peripheral speed becomes the yarn speed of the yarn 20 (the average traveling speed of the yarn 20). Therefore, when the contact point moves to the vicinity of the center position of the outer peripheral surface of the package 30, the contact roller peripheral speed is substantially the same as the package center diameter peripheral speed. That is, the contact roller peripheral speed is substantially the same as the yarn speed of the yarn 20. Further, the contact roller peripheral speed and the package center diameter peripheral speed are strictly different from each other due to occurrence of slip or the like between the package 30 and the contact roller 29.

As the yarn 20 is wound around the winding bobbin 22, the contact roller peripheral speed converges toward the yarn speed of the yarn 20. The speed at which the contact roller peripheral speed converges toward the yarn speed of the yarn 20 varies depending on the size of the gap between the winding bobbin 22 and the contact roller 29, that is, the state in which the rotation axis of the winding bobbin 22 (package 30) is inclined with respect to the rotation axis of the contact roller 29.

Fig. 6 shows changes in the contact roller peripheral speed when the yarn 20 is wound in the state shown in fig. 4 (a), 4 (c), 5 (a), and 5 (b). A curve L1 shown in fig. 6 shows a change in the peripheral speed when the yarn 20 is wound in the state shown in fig. 5 (a). A curve L2 shown in fig. 6 shows a change in the peripheral speed when the yarn 20 is wound in the state shown in fig. 4 (a). A curve S1 shown in fig. 6 shows a change in the peripheral speed when the yarn 20 is wound in the state shown in fig. 5 (b). A curve S2 shown in fig. 6 shows a change in the peripheral speed when the yarn 20 is wound in the state shown in fig. 4 (c).

As described above, for example, even when the large-diameter side end of the package 30 abuts against the touch roller 29, the time required for the touch roller peripheral speed to converge to the yarn speed of the yarn differs depending on the state of inclination of the winding bobbin 22 (package 30) with respect to the touch roller 29, as shown by curves L1 and L2 in fig. 6. Similarly, even if the small-diameter-side end of the package 30 abuts against the touch roller 29, the time required for the touch roller peripheral speed to converge to the yarn speed of the yarn differs depending on the state of inclination of the winding bobbin 22 (package 30) with respect to the touch roller 29, as shown by curves S1 and S2 in fig. 6.

Therefore, the contact state determination unit 53 can determine the contact state, which is the state of the inclination of the winding bobbin 22 (package 30) with respect to the contact roller 29, based on how much the contact roller peripheral speed converges with the yarn speed of the yarn 20 after a predetermined time has elapsed from the start of winding the yarn 20. The contact state determination unit 53 may determine which of the large-diameter side end and the small-diameter side end of the package 30 is in contact with the contact roller 29 based on whether the contact roller peripheral speed after a predetermined time has elapsed since the start of winding of the yarn 20 is faster or slower than the yarn speed of the yarn 20. That is, the contact state determination unit 53 determines that the end of the package 30 at the larger diameter side is in contact when the contact roller peripheral speed is higher than the yarn speed of the yarn 20. The contact state determination unit 53 determines that the end of the package 30 on the smaller-diameter side is in contact when the contact roller peripheral speed is slower than the yarn speed of the yarn 20.

As described above, the contact state determination unit 53 determines which of the large diameter side end, the small diameter side end, and the center position of the winding bobbin 22 or the package 30 is in contact with the contact roller 29 as the contact state by comparing the contact roller peripheral speed with the package center diameter peripheral speed. The contact state determination unit 53 can perform this determination at any of the time when winding of the yarn 20 is started and after the start of winding. The contact state determination unit 53 determines the state of the inclination of the winding bobbin 22 (package 30) with respect to the contact roller 29 as a contact state based on the change with time in the difference between the yarn speed of the yarn 20 and the contact roller peripheral speed. The contact state determination unit 53 can perform this determination after a predetermined time has elapsed from the start of winding of the yarn 20.

The report determination unit 54 determines whether or not the contact state determined by the contact state determination unit 53 is a predetermined report target contact state. The report determination unit 54 adopts the contact state of the report target set by the setting unit 91 as the contact state of the report target set in advance. The contact state of the report target includes: the winding bobbin 22 or the package 30 has at least one of a large-diameter side end, a small-diameter side end, and a central position, which is in contact with the touch roller 29, and a state in which the winding bobbin 22 (package 30) is inclined with respect to the touch roller 29.

In the present embodiment, as examples of the contact state to be reported, a state in which the end on the small diameter side of the winding bobbin 22 or the package 30 is in contact with the contact roller 29, and a state in which the center position of the winding bobbin 22 or the package 30 is in contact with the contact roller 29 are set. Further, as an example of the contact state to be reported, a state is set in which the large-diameter side end portion of the package 30 contacts the contact roller 29 and the inclination of the package 30 is set such that the gap between the small-diameter side end portion of the package 30 and the outer peripheral surface of the contact roller 29 is a predetermined value or more.

The report instructing unit 55 operates the speaker 93 to give a report when the report determining unit 54 determines that the abutment state of the winding bobbin 22 or the package 30 is the abutment state to be reported. In this way, the report instructing unit 55 and the speaker 93 function as a reporting unit that reports when the report judging unit 54 judges that the contact state is the report target.

The storage unit 56 stores identification information for identifying the package 30 in association with the contact state determined for the package 30 by the contact state determination unit 53. The storage unit 56 can use identification information given by a known method, such as identification information given by the unit control unit 50 to manage each package 30, as the identification information of the package 30. As described above, the storage unit 56 stores the shape of the winding bobbin 22 in advance for each type of the winding bobbin 22. As described above, the storage unit 56 may store the circumferential velocity information in which the shape of the winding bobbin 22 is associated with the circumferential velocity of the outer circumferential surface of the winding bobbin 22 at a predetermined position for each shape of the winding bobbin 22.

The unit control section 50 controls the operation of the traverse drive motor 76 in addition to the determination of the contact state and the like described above. The unit control unit 50 controls the catching operation of the lower yarn catching member 25 and the upper yarn catching member 26 (the rotation of the lower yarn bobbin arm 33 and the upper yarn bobbin arm 36). The unit control unit 50 controls opening and closing of the opening and closing units provided in the lower yarn tubular arm 33 and the upper yarn tubular arm 36, and controls stop and generation of the suction flow from the lower yarn suction port 32 and the upper yarn suction port 35.

As described above, in the winder unit 10 according to the present embodiment, the contact state determination unit 53 can determine which portion of the winding bobbin 22 or the package 30 is in contact with the contact roller 29, that is, the contact state of the winding bobbin 22 or the package 30, by comparing the package center diameter peripheral speed with the contact roller peripheral speed. In this way, the winder unit 10 can determine the contact state of the winding bobbin 22 or the package 30 with the contact roller 29.

The package peripheral speed obtaining section 51 can derive the peripheral speed by calculation based on the peripheral speed calculation information for calculating the peripheral speed of the outer peripheral surface of the winding bobbin 22 or the package 30 at a predetermined position. In this case, the package circumferential speed obtaining section 51 can obtain the circumferential speed of the outer circumferential surface of the winding bobbin 22 or the package 30 at a predetermined position by calculation.

The peripheral speed calculation information may include at least one of the shape of the winding bobbin 22, the rotational speed of the winding bobbin 22, and the yarn speed of the wound yarn 20. In this case, the package peripheral speed obtaining unit 51 can calculate the peripheral speed with high accuracy using the above value.

The winding peripheral speed acquisition unit 51 can acquire the peripheral speed corresponding to the shape of the bobbin specified by the bobbin information input to the setting unit 91 from the storage unit 56. In this case, the package peripheral speed acquisition unit 51 can acquire the peripheral speed from the storage unit 56 without performing calculation.

When the report determination unit 54 determines that the contact state is the report target, the report instruction unit 55 outputs a sound from the speaker 93 to perform a report. In this case, the operator of the winder unit 10 can grasp the contact state of the winding bobbin 22 or the package 30 based on the sound output from the speaker 93. Further, the operator can perform a countermeasure such as adjusting the contact state of the winding bobbin 22 or the package 30 or stopping the winding of the yarn 20.

The winder unit 10 includes a setting unit 91 for inputting the contact state of the report target. In this case, the operator of the winder unit 10 can set the contact state of the report target using the setting unit 91. The operator of the winder unit 10 can switch the contact state of the report target according to the type of the yarn 20 to be wound.

The speed of movement of the contact point that moves toward the center position of the outer peripheral surface of the package 30 changes according to the state of the inclination of the winding bobbin 22 with respect to the contact roller 29. That is, the speed at which the contact roller peripheral speed converges toward the yarn speed of the yarn 20 is different. Therefore, the contact state determination unit 53 can determine the state of inclination of the winding bobbin 22 with respect to the contact roller 29, that is, the contact state of the package 30 with respect to the contact roller 29, based on the temporal change in the difference between the yarn speed and the contact roller peripheral speed.

The storage unit 56 stores the identification information of the package 30 in association with the contact state determined by the contact state determination unit 53 for the package 30. In this case, even after the package 30 is formed, the operator or the like of the winder unit 10 can confirm the contact state when the yarn 20 is wound in the package 30 based on the information stored in the storage unit 56.

The embodiments and modifications of the present invention have been described above, but the present invention is not limited to the embodiments and modifications. The present invention can be modified within the scope not changing the gist described in each technical means. The above embodiments and the above modifications may be combined as appropriate.

For example, the central axis defined by the outer peripheral surface of the winding bobbin 22 and the rotation axis of the winding bobbin 22 may be displaced due to deformation of the winding bobbin 22. In this case, the outer peripheral surface of the winding bobbin 22 intermittently contacts the outer peripheral surface of the contact roller 29, and the peripheral speed of the contact roller 29 does not increase. Therefore, the contact state determination unit 53 may determine that the winding bobbin 22 is deformed when the contact circumferential speed is not equal to or higher than the predetermined value even after the predetermined time has elapsed.

The traverse device 70 is not limited to a configuration in which the traverse arm 74 is reciprocated and rotated to traverse the yarn 20. For example, the traverse device 70 may be configured to traverse the yarn 20 by reciprocating the yarn guide 73 by belt driving.

When the report determining unit 54 determines that the contact state is the report target, the package drive control unit 57 may stop winding the yarn 20. The report instruction unit 55 may perform a report by changing the display form of the display unit 92 in addition to the speaker 93 or instead of the speaker 93.

The cradle 23 may include a mechanism for changing the angle of the winding bobbin 22 based on the contact state determined by the contact state determination unit 53 so as to be in a predetermined contact state.

The winder unit 10 does not necessarily have to report the contact state based on the determination result. The winder unit 10 may determine only the contact state or store only the determined contact state in association with the identification information of the package 30. The contact state of the report object used by the report determination unit 54 in the determination may not be changed by the setting unit 91. In this case, the contact state to be reported by the report determination unit 54 may be a preset contact state. The contact state determination unit 53 may not determine the contact state based on a temporal change in the difference between the yarn speed of the yarn 20 and the contact roller peripheral speed. The winder unit 10 may not include the storage unit 56 that stores the identification information of the package 30 in association with the contact state.

The package peripheral speed obtaining section 51 obtains the peripheral speed of the outer peripheral surface at the center position in the rotation axis direction as the peripheral speed at the predetermined position in the rotation axis direction of each of the winding bobbin 22 and the package 30. The winding peripheral speed obtaining section 51 may obtain the peripheral speed (first peripheral speed) of the outer peripheral surface at a predetermined position between the large-diameter side end portion and the small-diameter side end portion as the peripheral speed at a predetermined position in the rotation axis direction of the winding bobbin 22 and the package 30.

Description of the reference numerals

A 10 … winder unit (yarn winder), a 15 … photoelectric type fixed length device (yarn speed detecting section), a 20 … yarn, a 22 … winding bobbin (bobbin), a 29 … touch roller, a 30 … package, a 41 … package drive motor (driving section), a 51 … package peripheral speed acquiring section, a 52 … roller peripheral speed calculating section, a 53 … contact state determining section, a 54 … report determining section, a 55 … report instructing section (reporting section), a 56 … storing section (peripheral speed information storing section, contact state storing section), a 70 … traverse device, a 73 … yarn guiding section, a 91 … setting section (bobbin information input section, contact state input section), a 93 … speaker (reporting section), and a B1 … first bobbin holding section (bobbin holding section).

Claims

1. A yarn winding machine for winding a yarn around a tapered bobbin to form a tapered package, comprising:

a cradle which rotatably supports the bobbin by a bobbin holding section which holds the bobbin;

a driving unit mounted on the cradle, having a rotating shaft connected to the bobbin holding unit so as to be rotatable integrally therewith, and rotating the bobbin by rotating the bobbin holding unit;

a traverse device that traverses the yarn wound around the bobbin or the package by moving a yarn guide portion on which the yarn is hooked;

a package circumferential speed acquisition unit configured to acquire a circumferential speed of the bobbin or an outer circumferential surface of the package at a predetermined position in a rotational axis direction of the bobbin as a first circumferential speed;

a contact roller that is in contact with an outer peripheral surface of the bobbin or the package and that rotates in a driven manner in accordance with rotation of the bobbin or the package;

a roller peripheral speed calculating unit that calculates a peripheral speed of the outer peripheral surface of the contact roller as a second peripheral speed; and

and an abutting state determination unit that determines an abutting state of the bobbin or the package abutting against the touch roller by comparing the first peripheral speed acquired by the package peripheral speed acquisition unit and the second peripheral speed calculated by the roller peripheral speed calculation unit.

2. The yarn winding machine according to claim 1,

the package peripheral speed acquisition unit derives the first peripheral speed by calculation based on peripheral speed calculation information for calculating the first peripheral speed, which is a peripheral speed of the outer peripheral surface of the bobbin or the package at the predetermined position.

3. The yarn winding machine according to claim 2,

the peripheral speed calculation information includes at least one of a shape of the bobbin, a rotational speed of the bobbin, and a yarn speed of the yarn to be wound.

4. The yarn winding machine according to claim 1,

further provided with:

a bobbin information input unit for inputting bobbin information for specifying the shape of the bobbin; and

a circumferential velocity information storage unit that stores circumferential velocity information in which the shape of the bobbin is associated with the circumferential velocity of the outer circumferential surface of the bobbin at the predetermined position for each shape of the bobbin,

the winding peripheral speed obtaining unit obtains, from the peripheral speed information storage unit, the peripheral speed corresponding to the shape of the bobbin specified by the bobbin information input to the bobbin information input unit, as the first peripheral speed.

5. The yarn winding machine according to any one of claims 1 to 4,

further provided with:

a report determination unit configured to determine whether or not the contact state determined by the contact state determination unit is a predetermined contact state to be reported; and

and a reporting unit configured to perform a report when the report determination unit determines that the contact state of the report target is the contact state of the contact object.

6. The yarn winding machine according to claim 5,

further comprises an abutting state input unit for inputting the abutting state of the report object,

the report determination unit may adopt the contact state of the report target input by the contact state input unit as the contact state of the predetermined report target.

7. The yarn winding machine according to any one of claims 1 to 6,

further comprising a yarn speed detecting section for detecting a yarn speed of the yarn wound around the bobbin or the package,

the contact state determination unit further determines the contact state based on a change with time of a difference between the yarn speed detected by the yarn speed detection unit and the second peripheral speed calculated by the peripheral speed calculation unit.

8. The yarn winding machine according to any one of claims 1 to 7,

the apparatus further includes a contact state storage unit that stores identification information for identifying the package in association with the contact state determined for the package by the contact state determination unit.