thread winding machine

Abstract

To cool the motor while minimizing unnecessary power consumption. [Solution] The system comprises a contact roller motor 32 for rotating the contact roller, an inverter 32a for adjusting the rotational speed of the contact roller motor 32, a fan for supplying cooling air to the contact roller motor 32, a fan motor 33 for rotating the fan, an inverter 33a for adjusting the rotational speed of the fan motor 33, an input unit 27 configured to accept input for the winding speed of the yarn Y, and a control unit 29. The control unit 29 controls the rotational speed of the contact roller by controlling the inverter 32a based on the winding speed of the yarn Y input to the input unit 27 when the yarn Y is being wound, and controls the rotational speed of the fan by controlling the inverter 33a based on the winding speed of the yarn Y input to the input unit 27.

Description

Technical Field

[0005]

[0001] The present invention relates to a thread winding machine that winds a thread onto a bobbin.

Background Art

[0002] Patent Document 1 discloses a thread winding machine that winds a plurality of threads onto a plurality of bobbins attached to bobbin holders to form a plurality of packages. Such a thread winding machine includes a contact roller that can contact a plurality of packages, and a contact roller motor that rotationally drives the contact roller. The contact roller rotates while applying contact pressure to the outer peripheral surface of the package to adjust the shape of the package.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In a thread winding machine as described above, it is difficult to employ a large motor for the contact roller motor due to space constraints. Therefore, in order to prevent the load on the contact roller motor from increasing, the contact roller employs a roller with a relatively small diameter to reduce its weight. However, since the diameter of the contact roller is small, it is necessary to increase the rotational speed (number of rotations) of the contact roller, and the load on the contact roller motor remains large. Thus, the contact roller motor has a large amount of heat generation due to such a large load, and problems such as internal components such as couplings being damaged earlier by heat occur. [[ID=|37]]

[0005] Therefore, the inventors of this invention considered providing a fan to cool the contact roller motor. The amount of heat generated by the contact roller motor varies depending on the rotation speed of the contact roller. In other words, the airflow required from the fan to cool the contact roller motor also varies depending on the rotation speed of the contact roller. If the fan airflow is excessive, unnecessary power consumption occurs, and if the fan airflow is insufficient, the contact roller motor cannot be adequately cooled.

[0006] The objective of the present invention is to provide a thread winding machine that can suitably cool the contact roller motor while suppressing unnecessary power consumption. [Means for solving the problem]

[0007] The first invention relates to a yarn winding machine that winds yarn onto a bobbin to form a package, and comprises a bobbin holder on which the bobbin is mounted, a contact roller that applies contact pressure to the outer surface of the package, a contact roller motor that rotates the contact roller, a first rotational speed adjustment device that adjusts the rotational speed of the contact roller motor, a fan that sends cooling air to the contact roller motor, a fan motor that rotates the fan, a second rotational speed adjustment device that adjusts the rotational speed of the fan motor, an input unit configured to accept input for the yarn winding speed, and a control unit, wherein the control unit performs a first process of controlling the rotational speed of the contact roller by controlling the first rotational speed adjustment device based on the yarn winding speed input to the input unit when winding the yarn, and a second process of controlling the rotational speed of the fan by controlling the second rotational speed adjustment device based on the yarn winding speed input to the input unit.

[0008] In this invention, the control unit controls the rotation speed of the contact roller based on the yarn winding speed input at the input unit during yarn winding. That is, the rotation speed of the contact roller depends on the yarn winding speed, and the amount of heat generated by the contact roller motor changes according to the yarn winding speed. The control unit also controls the rotation speed of the fan based on the yarn winding speed input at the input unit. Therefore, the rotation speed (airflow) of the fan can be controlled to an appropriate size considering the yarn winding speed, which is related to the amount of heat generated by the contact roller motor. Thus, the contact roller motor can be cooled effectively while suppressing unnecessary power consumption.

[0009] In the thread winding machine according to the second invention, in the first invention, the control unit determines the timing for starting the rotation of the fan based on the timing at which the contact roller motor starts rotating the contact roller.

[0010] In this invention, compared to a case where the fan rotates before the contact roller starts rotating, regardless of the start of the contact roller's rotation, unnecessary power consumption can be reduced.

[0011] In the thread winding machine according to the third invention, in the first or second invention, the control unit determines the timing for starting the second process based on the timing for starting the first process.

[0012] This invention makes it possible to reliably suppress the heat generated by the contact roller motor when winding the thread.

[0013] In the thread winding machine according to the fourth invention, in any of the first to third inventions, the control unit determines the timing for stopping the rotation of the fan based on the timing for stopping the rotation of the contact roller by the contact roller motor.

[0014] In this invention, compared to a case where the fan continues to rotate even after the contact roller stops rotating, regardless of the contact roller's rotation, unnecessary power consumption can be reduced.

[0015] In the yarn winding machine according to the fifth invention, in any of the first to fourth inventions, the control unit controls the rotation speed of the fan to increase as the yarn winding speed increases during the second process.

[0016] The faster the thread winding speed, the greater the need to increase the rotation speed of the contact roller. A higher contact roller rotation speed tends to increase the heat generated by the contact roller motor. Furthermore, as the fan rotation speed increases, the airflow increases, improving its cooling capacity. In this invention, the fan's cooling capacity can be increased as the heat generated by the contact roller motor increases. Therefore, the contact roller motor can be effectively cooled while reliably suppressing unnecessary power consumption.

[0017] The thread winding machine according to the sixth invention is provided with a cover that covers at least a part of the contact roller motor in any of the first to fifth inventions, and the fan is attached to the cover.

[0018] In this invention, a fan is placed near the contact roller motor to effectively cool the contact roller motor. [Brief explanation of the drawing]

[0019] [Figure 1] This is a side view of a thread winding device having a thread winding machine according to this embodiment. [Figure 2] This is a front view of a thread winding machine. [Figure 3] This is a block diagram showing the electrical configuration of a thread winding machine. [Figure 4] This graph shows an example of the relationship between the thread winding speed and the output (rotational speed) of the fan motor. [Figure 5]It is a graph showing the relationship between the winding speed of the yarn and the temperature of the contact roller motor. [Figure 6] It is a flowchart showing an example of the processing performed by the control unit when producing the yarn.

Embodiment for Carrying out the Invention

[0020] (Schematic Configuration of the Take-up Device) First, the take-up device 1 having the yarn winder 4 according to the present embodiment will be described with reference to FIG. 1. FIG. 1 is a side view of the take-up device 1. Hereinafter, the horizontal direction in the drawing of FIG. 1 is defined as the front-rear direction, and the vertical direction perpendicular to the drawing is defined as the left-right direction. The direction perpendicular to both the front-rear direction and the left-right direction is defined as the up-down direction (vertical direction) in which gravity acts. The front-rear direction and the left-right direction are directions substantially parallel to the horizontal direction.

[0021] The take-up device 1 is configured to take up a plurality of yarns Y spun from the spinning device 3 and wind them around a plurality of bobbins B respectively to form a plurality of packages P. The spinning device 3 discharges, for example, a molten polymer which is the material of the yarn Y. The material of the yarn Y is, for example, a polyester-based material such as PET, but is not limited thereto. The yarn Y is, for example, a monofilament yarn composed of one filament, but is not limited thereto. The take-up device 1 mainly includes a first godet roller 11, a second godet roller 12, and a yarn winder 4.

[0022] The first godet roller 11 is a roller whose axial direction is substantially parallel to the left-right direction. The first godet roller 11 is disposed, for example, below the spinning device 3. The first godet roller 11 is disposed above the front end portion of the yarn winder 4. A plurality of yarns Y are wound around the first godet roller 11 side by side in the left-right direction. The first godet roller 11 is rotationally driven by a motor (not shown). Thereby, the first godet roller 11 sends a plurality of yarns Y to the downstream side in the yarn running direction. <​​The second godet roller 12 is a roller whose axial direction is approximately parallel to the left-right direction. The second godet roller 12 is positioned downstream of the first godet roller 11 in the yarn travel direction. The second godet roller 12 is positioned above and behind the first godet roller 11. The second godet roller 12 is rotationally driven by a motor (not shown). As a result, the second godet roller 12 feeds the yarn Y downstream in the yarn travel direction.

[0024] The yarn winding machine 4 winds multiple threads Y onto multiple bobbins B to form multiple packages P. The yarn winding machine 4 is located downstream of the second godet roller 12 in the thread travel direction. The yarn winding machine 4 is located below the second godet roller 12.

[0025] (Thread winding machine) Next, the thread winding machine 4 will be explained with further reference to Figures 2 and 3. Figure 2 is a front view of the thread winding machine 4. Note that the front cover 26, which will be described later, is omitted from Figure 2. Figure 3 is a block diagram showing the electrical configuration of the thread winding machine 4.

[0026] As shown in Figures 1 and 2, the thread winding machine 4 mainly comprises a machine base 20, a plurality of pivot guides 21, a plurality of traverse guides 22, a turret 23, two bobbin holders 24, a contact roller 25, a contact roller motor 32, a fan 34, a front cover 26, and a control unit 29.

[0027] As shown in Figure 1, the machine base 20 has a machine base body 20a located at the rear end of the thread winding machine 4, and a support 20b fixed to the upper part of the machine base body 20a and extending forward. The machine base body 20a supports the turret 23, etc. The support 20b supports the contact roller 25 and a plurality of traverse guides 22.

[0028] Multiple pivot guides 21 are individually provided for each of the multiple threads Y and are arranged in the front-to-back direction. The multiple pivot guides 21 are attached to a guide support member 28 supported by a support body 20b. Each of the multiple pivot guides 21 is hung on a different thread Y, and each of the multiple threads Y becomes a pivot point when the threads Y are spun.

[0029] Multiple traverse guides 22 are individually provided for multiple threads Y and are arranged in the front-to-back direction. The multiple traverse guides 22 are driven by a traverse motor (not shown) and move back and forth in the front-to-back direction. As a result, the threads Y that are placed on the traverse guides 22 are traversed around the pivot guide 21 as a pivot point.

[0030] The turret 23 is a disc-shaped member whose axial direction is approximately parallel to the front-rear direction. The turret 23 is rotatably supported on the machine base body 20a. The turret 23 cantilever-supports two bobbin holders 24. The turret 23 is rotationally driven by a turret motor (not shown). The turret 23 moves the two bobbin holders 24 by rotating around a pivot axis approximately parallel to the front-rear direction. This makes it possible to swap the positions of the two bobbin holders 24 in the thread winding machine 4. While thread Y is being wound onto bobbin B mounted on one bobbin holder 24, it is possible to replace bobbin B on the other bobbin holder 24.

[0031] The two bobbin holders 24 are each designed to hold multiple bobbins B. Both bobbin holders 24 extend forward from the turret 23. Each of the two bobbin holders 24 is rotatably supported at the upper and lower ends of the turret 23, which is supported by the machine base body 20a. In other words, the two bobbin holders 24 are cantilevered by the machine base body 20a located at the rear. The axial directions of the two bobbin holders 24 are approximately parallel to the front-to-back direction. The tip side (front end) of the bobbin holder 24 is generally the work side where operations such as attaching bobbins B to the bobbin holder 24 are performed.

[0032] Each bobbin holder 24 is equipped with multiple bobbins B, each individually provided for multiple threads Y, arranged in a front-to-back direction. For example, one bobbin holder 24 can hold 16 bobbins B. Furthermore, each of the two bobbin holders 24 is rotated by an individual winding motor 31 (see Figure 3).

[0033] The contact roller 25 is a roller whose axial direction is substantially parallel to the front-rear direction. The contact roller 25 is positioned directly above the upper bobbin holder 24. The contact roller 25 is rotatably supported by the support body 20b. The contact roller 25 is rotationally driven by the contact roller motor 32. When the yarn Y is wound, the contact roller 25 rotates while contacting the outer circumferential surfaces of the multiple packages P supported by the upper bobbin holder 24. In this way, the contact roller 25 applies contact pressure to the outer circumferential surfaces of the packages P during winding, thereby shaping the packages P.

[0034] The contact roller motor 32 transmits power to the contact roller 25 via a coupling (not shown), thereby rotating the contact roller 25. As shown in Figure 1, the contact roller motor 32 is attached to the front end of the contact roller 25.

[0035] The fan 34 is positioned in front of the contact roller motor 32. The fan 34 blows cooling air onto the contact roller motor 32. The fan 34 is rotationally driven by the fan motor 33 (see Figure 3). The fan 34 may be integrated with the motor.

[0036] As shown in Figure 1, the front cover 26 is provided at the front end of the support 20b. The front cover 26 is provided with an input unit 27 (see Figure 3) for the operator to input instructions to the yarn winding machine 4. The input unit 27 consists of, for example, operation buttons or a touch panel. The front cover 26 is, for example, a member that covers at least a part of the components of the yarn winding machine 4 from the front. In this embodiment, the front cover 26 covers at least a part of the contact roller motor 32 and the circuit board (not shown) electrically connected to the input unit 27, and protects them. The front cover 26 supports the fan 34.

[0037] The control unit 29 includes a CPU, ROM, RAM, etc. (not shown). The control unit 29 controls each part of the yarn winder 4 using the CPU according to a program stored in the ROM. As shown in Figure 3, the winding motor 31, contact roller motor 32, and fan motor 33 are electrically connected to the control unit 29. The winding motor 31 is connected to the control unit 29 via an inverter 31a. The inverter 31a can adjust the rotation speed of the winding motor 31. The contact roller motor 32 is connected to the control unit 29 via an inverter 32a (first rotation speed adjustment device of the present invention). The inverter 32a can adjust the rotation speed of the contact roller motor 32. The fan motor 33 is connected to the control unit 29 via an inverter 33a (second rotation speed adjustment device of the present invention). The inverter 33a can adjust the rotation speed of the fan motor 33.

[0038] In the yarn winding machine 4 having the above configuration, when the upper bobbin holder 24 is rotated, the yarn Y spun by the traverse guide 22 is wound onto the bobbin B to form a package P. While the package P is being formed, the contact roller 25, which is rotated by the contact roller motor 32, contacts the outer surface of the package P and applies contact pressure, thereby shaping the package P. When the package P is fully wound, the turret 23 is rotated, causing the upper and lower positions of the two bobbin holders 24 to be swapped. As a result, the bobbin holder 24 that was located on the lower side moves to the upper side, and the yarn Y can be wound onto the bobbin B attached to this bobbin holder 24 to form another package P. The bobbin holder 24 with the fully wound package P attached moves to the lower side. The fully wound package P is collected by, for example, a package recovery device (not shown).

[0039] (Control Unit) Next, the control unit 29 will be described in more detail. The control unit 29 can control the rotation speed of the bobbin holder 24 by adjusting the rotation speed of the winding motor 31 that rotates the bobbin holder 24 using an inverter 31a. The control unit 29 can control the rotation speed of the contact roller 25 by adjusting the rotation speed of the contact roller motor 32 that rotates the contact roller 25 using an inverter 32a. The control unit 29 can control the rotation speed of the fan 34 by adjusting the rotation speed of the fan motor 33 that rotates the fan 34 using an inverter 33a.

[0040] Furthermore, the control unit 29 has a storage unit 30, as shown in Figure 3. The storage unit 30 stores related information relating the rotational speed of the fan 34 suitable for cooling the contact roller motor 32 to the winding speed of the thread Y. The storage unit 30 includes, for example, RAM or a hard disk. Here, an example of related information is shown in Figure 4. Figure 4 is a graph showing the relationship between the magnitude of the output of the fan motor 33 (rotational speed of the fan 34) and the winding speed of the thread Y. In the example shown in Figure 4, the output of the fan motor 33 increases in proportion to the winding speed of the thread Y. In other words, in this embodiment, the related information is information that the rotational speed of the fan 34 increases as the winding speed of the thread Y increases. The related information stored in the control unit 29 may be a function or a table.

[0041] The rotational speed of the contact roller 25 depends on the winding speed of the yarn Y; the faster the winding speed of the yarn Y, the greater the need to increase the rotational speed of the contact roller 25. The higher the rotational speed of the contact roller 25, the greater the heat generated by the contact roller motor 32 that rotates the contact roller 25. Also, the airflow of the fan 34 increases as the rotational speed increases, thus improving its cooling capacity. Therefore, according to the relevant information, by increasing the rotational speed of the fan 34 as the winding speed of the yarn Y increases, it is possible to keep the temperature of the contact roller motor 32 at an ideal temperature T almost constant, even when the winding speed of the yarn Y increases, as shown in Figure 5.

[0042] The relationship between the winding speed of the thread Y and the magnitude of the output of the fan motor 33 (rotation speed of the fan 34) does not have to be proportional. The control unit 29 may, for example, control the fan 34 to increase as the winding speed of the thread Y increases, but only when the winding speed of the thread Y is within a predetermined range. That is, the control unit 29 may, for example, control the fan 34 to increase as the winding speed of the thread Y increases when the winding speed of the thread Y is greater than or equal to a first predetermined value. Alternatively, for example, when the winding speed of the thread Y is less than or equal to a second predetermined value, control the fan 34 to increase as the winding speed of the thread Y increases.

[0043] When winding the yarn Y, the control unit 29 controls the rotation speed of the bobbin holder 24, the rotation speed of the contact roller 25, and the rotation speed of the fan 34 according to the winding speed of the yarn Y. The winding speed of the yarn Y varies depending on the type of yarn Y being wound. The winding speed of the yarn Y is set by the operator. The operator inputs the winding speed of the yarn Y by operating, for example, the input unit 27 provided on the front cover 26. The input of the winding speed of the yarn Y may also be done by a device such as a PC or tablet terminal connected to the yarn winder 4 by wire or wireless.

[0044] The control unit 29 controls the rotational speed of the bobbin holder 24, for example, so that the peripheral speed of the package P supported by the bobbin holder 24 matches the winding speed of the yarn Y input by the input unit 27. The control unit 29 also controls the rotational speed of the contact roller 25, for example so that the peripheral speed of the contact roller 25 matches the winding speed of the yarn Y input by the input unit 27 (first process). In addition, the control unit 29 may control the rotational speed of the contact roller 25 to a preset speed for threading when threading is performed before winding of the yarn Y begins. The rotational speed of the contact roller 25 during threading is lower than that during winding of the yarn Y.

[0045] Furthermore, the control unit 29 controls the rotation speed of the fan 34 based on the winding speed of the yarn Y input at the input unit 27 and the related information stored in the storage unit 30 (second process). That is, the control unit 29 controls the rotation speed of the fan 34 to correspond to the winding speed of the yarn Y input at the input unit 27 in the related information shown in Figure 4. In other words, in this embodiment, the control unit 29 controls the rotation speed of the fan 34 to increase as the winding speed of the yarn Y increases.

[0046] Furthermore, the control unit 29 determines the timing for starting the rotation of the fan 34 based on the timing at which the contact roller motor 32 starts rotating the contact roller 25. In this embodiment, the control unit 29 starts the rotation of the fan 34 at the same time as the rotation of the contact roller 25. The control unit 29 may, for example, start the rotation of the fan 34 after a predetermined time has elapsed since the rotation of the contact roller 25.

[0047] Furthermore, the control unit 29 determines the timing for starting the second process related to the rotation speed of the fan 34 based on the timing for starting the first process related to the rotation speed of the contact roller 25. In this embodiment, the control unit 29 starts the second process simultaneously with the start of the first process. The control unit 29 may, for example, start the second process after a predetermined time has elapsed since the start of the first process.

[0048] Furthermore, if the rotation of the contact roller 25 is started when winding of the yarn Y begins, the timing of starting the rotation of the contact roller 25 and the timing of starting the first process will be simultaneous. Also, if the contact roller 25 is rotated when threading the yarn before winding of the yarn Y begins, the timing of starting the first process will be later than the timing of starting the rotation of the contact roller 25.

[0049] Furthermore, the control unit 29 determines the timing for stopping the rotation of the fan 34 based on the timing for stopping the rotation of the contact roller 25 by the contact roller motor 32. In this embodiment, the control unit 29 stops the rotation of the fan 34 at the same time as stopping the rotation of the contact roller 25. The control unit 29 may, for example, stop the rotation of the fan 34 after a predetermined time has elapsed since stopping the rotation of the contact roller 25. Alternatively, the control unit 29 may stop the rotation of the fan 34 a predetermined time before the timing for stopping the rotation of the contact roller 25.

[0050] Next, with reference to Figure 6, an example of the processing performed by the control unit 29 when producing yarn Y in the yarn winding machine 4 will be described. Here, we will describe the case where the contact roller 25 starts rotating when the winding of yarn Y begins (it does not rotate when the yarn is threaded).

[0051] First, the control unit 29 determines whether the operator has input the winding speed of the thread Y (S1). The determination in S1 is repeated until it is determined that the winding speed of the thread Y has been input. If it is determined that the winding speed of the thread Y has been input (S1: YES), the control unit 29 determines the rotation speed of the contact roller 25 and the fan 34 based on the input winding speed of the thread Y (S2). At this time, the control unit 29 determines the rotation speed of the contact roller 25, for example, so that the peripheral speed of the contact roller 25 matches the winding speed of the thread Y. The control unit 29 also determines the rotation speed of the fan 34 based on the relevant information stored in the memory unit 30.

[0052] Next, the control unit 29 determines whether or not an instruction to start production of yarn Y has been input by the operator (S3). The production start instruction is input, for example, by the input unit 27. The determination in S3 is repeated until it is determined that an instruction to start production of yarn Y has been input. If it is determined that an instruction to start production of yarn Y has been input (S3: YES), the control unit 29 starts the rotation of the bobbin holder 24, performs the yarn threading operation on the bobbin B, and starts the rotation of the contact roller 25 at an appropriate timing (S4). Also, the control unit 29 starts the rotation of the fan 34 at the same time as the rotation of the contact roller 25 starts (S5). At this time, the control unit 29 controls the rotation speed of the contact roller 25 and the fan 34 so that they become the rotation speed determined in S2. After that, when production of yarn Y is finished, the control unit 29 stops the rotation of the contact roller 25 (S6). Also, the control unit 29 stops the rotation of the fan 34 at the same time as the rotation of the contact roller 25 stops (S7).

[0053] (Features of the embodiment) As described above, the yarn winding machine 4 of this embodiment is a yarn winding machine 4 that winds yarn Y onto a bobbin B to form a package P, and includes a bobbin holder 24 on which the bobbin B is mounted, a contact roller 25 that applies contact pressure to the outer surface of the package P, a contact roller motor 32 that rotates the contact roller 25, an inverter 32a that adjusts the rotational speed of the contact roller motor 32, a fan 34 that sends cooling air to the contact roller motor 32, a fan motor 33 that rotates the fan 34, an inverter 33a that adjusts the rotational speed of the fan motor 33, an input unit 27 configured to accept input for the winding speed of yarn Y, and a control unit 29. The control unit 29 controls the rotational speed of the contact roller 25 by controlling the inverter 32a based on the winding speed of yarn Y input to the input unit 27 when winding yarn Y (first process), and controls the rotational speed of the fan 34 by controlling the inverter 33a based on the winding speed of yarn Y input to the input unit 27 (second process).

[0054] In this configuration, the control unit 29 controls the rotation speed of the contact roller 25 based on the winding speed of the yarn Y input at the input unit 27 when the yarn Y is being wound. That is, the rotation speed of the contact roller 25 depends on the winding speed of the yarn Y, and the amount of heat generated by the contact roller motor 32 changes according to the winding speed of the yarn Y. The control unit 29 also controls the rotation speed of the fan 34 based on the winding speed of the yarn Y input at the input unit 27. Therefore, the rotation speed (airflow) of the fan 34 can be controlled to an appropriate size considering the winding speed of the yarn Y, which is related to the amount of heat generated by the contact roller motor 32. Thus, the contact roller motor 32 can be cooled effectively while suppressing unnecessary power consumption. Note that the rotation speed of the fan 34 for cooling the contact roller motor 32 is not directly related to the quality of the yarn Y. Therefore, conventionally, the rotation speed of the fan 34 has not been controlled according to the winding speed of the yarn Y.

[0055] Furthermore, in the thread winding machine 4 of this embodiment, the control unit 29 determines the timing for starting the rotation of the fan 34 based on the timing at which the contact roller motor 32 starts rotating the contact roller 25. Therefore, compared to the case where the fan 34 rotates before the contact roller 25 starts rotating, regardless of the start of rotation of the contact roller 25, unnecessary power consumption can be reduced.

[0056] In addition, in the yarn winding machine 4 of this embodiment, the control unit 29 determines the timing to start the second processing related to the rotation speed of the fan 34 based on the timing to start the first processing related to the rotation speed of the contact roller 25. Therefore, heat generation of the contact roller motor 32 when winding the yarn Y can be reliably suppressed.

[0057] Furthermore, in the thread winding machine 4 of this embodiment, the control unit 29 determines the timing for stopping the rotation of the fan 34 based on the timing for stopping the rotation of the contact roller 25 by the contact roller motor 32. Therefore, compared to the case where the fan 34 continues to rotate even after the rotation of the contact roller 25 has stopped, regardless of when the rotation of the contact roller 25 stops, unnecessary power consumption can be reduced.

[0058] In addition, in the yarn winding machine 4 of this embodiment, the control unit 29 controls the rotation speed of the fan 34 to increase as the winding speed of the yarn Y increases. As the winding speed of the yarn Y increases, it is necessary to increase the rotation speed of the contact roller 25. The higher the rotation speed of the contact roller 25, the greater the amount of heat generated by the contact roller motor 32 that rotates the contact roller 25. Also, as the rotation speed of the fan 34 increases, the airflow increases and the cooling capacity increases. Therefore, in this configuration, the greater the amount of heat generated by the contact roller motor 32, the higher the cooling capacity of the fan 34 can be. Thus, the contact roller motor 32 can be effectively cooled while reliably suppressing unnecessary power consumption.

[0059] Furthermore, the thread winding machine 4 of this embodiment is equipped with a front cover 26 that covers at least a portion of the contact roller motor 32, and the fan 34 is attached to the front cover 26. Therefore, the fan 34 can be positioned near the contact roller motor 32, allowing for optimal cooling of the contact roller motor 32.

[0060] Although embodiments of the present invention have been described above with reference to the drawings, it should be understood that the specific configurations are not limited to these embodiments. The scope of the present invention is indicated by the claims rather than the above description of embodiments, and all modifications within the meaning and scope equivalent to the claims are included.

[0061] In the above-described embodiment, the control unit 29 determines the timing for starting the rotation of the fan 34 based on the timing at which the contact roller motor 32 starts rotating the contact roller 25, but the invention is not limited to this. The control unit 29 may start rotating the fan 34 before the contact roller 25 starts rotating, regardless of the timing of the contact roller 25's rotation.

[0062] Furthermore, in the above-described embodiment, the control unit 29 determined the timing for starting the second processing related to the rotation speed of the fan 34 based on the timing for starting the first processing related to the rotation speed of the contact roller 25, but this is not limited to this. For example, when the contact roller 25 rotates at the speed for threading before the start of winding the thread Y, the second processing may be started at the timing when the contact roller 25 starts rotating at the speed for threading.

[0063] Furthermore, although the above-described embodiment described a case in which the control unit 29 determines the timing for stopping the rotation of the fan 34 based on the timing for stopping the rotation of the contact roller 25 by the contact roller motor 32, the invention is not limited to this. The control unit 29 may continue to rotate the fan 34 even after the rotation of the contact roller 25 has stopped, regardless of whether the rotation of the contact roller 25 has stopped.

[0064] Furthermore, although the above-described embodiment described a case in which the control unit 29 controls the fan 34 to increase in rotational speed as the winding speed of the yarn Y increases, it is not limited to this. For example, the control unit 29 may control the fan 34 to decrease in rotational speed as the winding speed of the yarn Y increases.

[0065] In addition, although the above-described embodiment described the case in which inverters 32a and 33a are used as devices for adjusting the rotational speed of the contact roller motor 32 and the fan motor 33, the invention is not limited to this. For example, a speed controller or the like may be used as a device for adjusting the rotational speed of the contact roller motor 32 and the fan motor 33.

[0066] Furthermore, although the above-described embodiment described a case where the fan 34 is attached to the front cover 26, the mounting location of the fan 34 is not limited to this.

[0067] Furthermore, although the above-described embodiment described a case in which the thread winding machine 4 is equipped with two bobbin holders 24, the number of bobbin holders 24 is not limited to two. In addition, although the case in which multiple packages P are supported by the bobbin holder 24 was described, the invention is not limited to this. The bobbin holder 24 may support one package P, and the contact roller 25 may apply contact pressure to one package P.

[0068] Furthermore, although the above embodiment described a case in which the control unit 29 provided in the thread winding machine 4 controls the inverters 32a and 33a, it is not limited to this. For example, the control unit that controls the entire take-up device 1 may control the inverters 32a and 33a. [Explanation of Symbols]

[0069] 4. Thread winding machine 24 Bobbin Holder 25 Contact rollers 26 Front cover (cover) 27 Input section 29 Control Unit 32 Contact roller motor 32A Inverter (First rotational speed adjustment device) 33 Fan motor 33a Inverter (Second rotational speed adjustment device) 34 Fans B Bobbin P Package Y thread

Claims

1. A thread winding machine that winds thread onto a bobbin to form a package, A bobbin holder on which the bobbin is mounted, A contact roller that applies contact pressure to the outer surface of the package, A contact roller motor that rotates the contact roller, A first rotational speed adjustment device for adjusting the rotational speed of the contact roller motor, A fan that sends cooling air to the contact roller motor, A fan motor that rotates the aforementioned fan, A second rotational speed adjustment device for adjusting the rotational speed of the aforementioned fan motor, An input unit configured to allow input of the winding speed of the thread, It includes a control unit, The control unit, During the winding of the thread, a first process is performed to control the rotational speed of the contact roller by controlling the first rotational speed adjustment device based on the winding speed of the thread input to the input unit, A yarn winding machine that performs a second process of controlling the rotation speed of the fan by controlling the second rotation speed adjustment device based on the yarn winding speed input at the input unit.

2. The thread winding machine according to claim 1, wherein the control unit determines the timing for starting the rotation of the fan based on the timing for starting the rotation of the contact roller by the contact roller motor.

3. The thread winding machine according to claim 1 or 2, wherein the control unit determines the timing for starting the second process based on the timing for starting the first process.

4. The thread winding machine according to any one of claims 1 to 3, wherein the control unit determines the timing for stopping the rotation of the fan based on the timing for stopping the rotation of the contact roller by the contact roller motor.

5. The yarn winding machine according to any one of claims 1 to 4, wherein the control unit controls the rotation speed of the fan to increase as the yarn winding speed increases in the second process.

6. It is equipped with a cover that covers at least a part of the contact roller motor, The winding machine according to any one of claims 1 to 5, wherein the fan is attached to the cover.

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