WO2019225138A1

WO2019225138A1 - Yarn winding machine

Info

Publication number: WO2019225138A1
Application number: PCT/JP2019/012201
Authority: WO
Inventors: 竹弘岡田; 欣三橋本; 志郎播戸; 坂本　憲一
Original assignee: Ｔｍｔマシナリー株式会社
Priority date: 2018-05-21
Filing date: 2019-03-22
Publication date: 2019-11-28
Also published as: TWI790374B; JPWO2019225138A1; TW202003364A; EP3798166B1; CN115649975A; EP4339145A3; EP3798166A4; EP4339145A2; EP3798166A1; CN112004766A; CN112004766B; JP6967667B2

Abstract

In order to achieve both smooth movement of a support arm and suppression of package vibration, a rewinder 1 in the present invention is provided with: a cradle device 21 which has a cradle arm 31 that rotatably supports a bobbin B and which is capable of moving the cradle arm 31 in a predetermined direction crossing the axial direction of the bobbin B; a vibration suppression lever 41 that is pressed against the cradle arm 31 and thereby suppresses the vibration of the cradle arm 31; and a pressing mechanism 61 that pushes the vibration suppression lever 41 against the cradle arm 31. The pressing mechanism 61 is capable of changing the magnitude of the pressing force during the winding operation of a yarn Y.

Description

Yarn winding machine

The present invention relates to a yarn winding machine that forms a package by winding a yarn around a bobbin.

Patent Document 1 discloses a yarn winding machine that forms a winding package by winding a yarn supplied from a yarn feeding package around a bobbin. Specifically, the yarn winding machine includes a swingable bobbin gripping member (support arm) that grips the bobbin rotatably, a friction roller that contacts the winding package and rotates the winding package, and a friction roller. And a motor for rotationally driving the motor. When the friction roller is driven to rotate, the winding package is driven to rotate and the yarn is wound around the winding package (winding operation). The support arm swings as the diameter of the winding package increases.

In the above-described yarn winding machine, the winding package may vibrate due to deformation of the winding package (slight deviation from the ideal shape) or the like. Such vibration may cause further deformation of the rotating winding package, and may cause the shape of the winding package to collapse. Therefore, it is conceivable to provide a vibration suppressing mechanism as described in Patent Document 2, for example, in the above-described yarn winding machine. The vibration suppression mechanism includes a brake piece attached to the support arm, a brake body pressed against the brake piece, and a spring that biases the brake body. Thereby, the vibration of the support arm is suppressed by the frictional force acting between the brake piece and the brake body, and the vibration of the package is suppressed.

JP 2004-107007 A Japanese Utility Model Publication No. 60-6048

In the vibration suppression mechanism described in Patent Document 2, the strength of the urging force of the spring is not actively changed during the winding operation. For this reason, when the biasing force of the spring is set in advance in order to surely suppress the vibration, the above-described frictional force may be too strong. If the frictional force is too strong, the support arm may not be smoothly swung with an increase in the diameter of the winding package. On the contrary, if the biasing force of the spring is set to be weak in advance so that the support arm swings smoothly, the frictional force may be too weak. If the frictional force is too weak, the suppression of the vibration of the winding package may be insufficient. Furthermore, for example, when the urging force required to sufficiently suppress the vibration of the winding package is significantly stronger than the urging force that causes the support arm to swing smoothly, the support arm smoothly swings. And the suppression of the vibration of the winding package may be impossible.

An object of the present invention is to achieve both smooth movement of the support arm and suppression of package vibration.

A yarn winding machine according to a first aspect of the present invention is a yarn winding machine that forms a package by winding a yarn around a bobbin, and has a support arm that rotatably supports the bobbin, and the support arm is attached to a shaft of the bobbin. A cradle device that can be moved in a predetermined direction that intersects the direction, a vibration suppression member that suppresses vibration of the support arm by being pressed against the support arm, and a pressing that presses the vibration suppression member against the support arm And the pressing mechanism can change the strength of the pressing force during the winding operation of the yarn.

In the present invention, when the vibration suppressing member is pressed against the support arm by the pressing mechanism, a frictional force acts between the vibration suppressing member and the support arm. Thereby, the vibration of the support arm is suppressed and the vibration of the package is suppressed. Furthermore, the pressing mechanism can change the strength of the pressing force during the winding operation. That is, the frictional force can be changed during the winding operation. For this reason, when it is desired to move the support arm in a predetermined direction, the support arm can be reliably and smoothly moved by reducing the frictional force. Further, when it is desired to suppress the vibration of the package, the vibration of the support arm can be reliably suppressed by increasing the frictional force. Therefore, both smooth movement of the support arm and suppression of package vibration can be achieved.

A yarn winding machine according to a second invention is characterized in that, in the first invention, the pressing mechanism has a fluid pressure cylinder in which the strength of the pressing force changes according to the pressure of the supplied fluid. Is.

As the pressing mechanism, for example, a general ball screw mechanism or an electric actuator may be used. However, the mechanism as described above is originally intended to change the position of the object rather than the strength of the pressing force itself. For this reason, it may be difficult to accurately control the strength of the pressing force. In addition, the above mechanism is generally difficult to absorb vibration. In other words, for example, when the support arm vibrates slightly and the vibration propagates to the vibration suppressing member, repulsion by the pressing mechanism is likely to occur against the vibration. As a result, the pressing force may become unstable. In the present invention, the strength of the pressing force itself can be changed by changing the supply pressure of the fluid. Further, since the fluid pressure cylinder generally has a cushioning property, even if the vibration suppressing member vibrates, it can absorb the vibration and suppress the fluctuation of the pressing force. Therefore, destabilization of the pressing force can be suppressed.

A yarn winding machine according to a third aspect of the present invention is the first or second aspect of the invention, further comprising a contact pressure applying roller that applies a contact pressure to the rotating package, and the contact pressure applying roller is provided on the package. It is possible to move with a change in diameter.

In a configuration in which the package rotates while being in contact with the contact pressure applying roller, the package rotates so that its surface follows the surface of the contact pressure applying roller. For this reason, depending on the hardness (density) of the package, even if the package is slightly deformed from the ideal shape, a large vibration may occur. In such a configuration, the strength of the pressing force can be changed as in the present invention, and it is effective that both the smooth movement of the support arm and the suppression of the vibration of the package can be achieved.

Further, in a configuration in which both the support arm and the contact pressure applying roller are movable, the movement of the support arm and the contact pressure applying roller may be unstable, and the package may be easily vibrated. In the present invention, since the strength of the pressing force can be changed during the winding operation, even if the movement of the support arm or the contact pressure applying roller becomes unstable, the vibration of the package is surely increased by increasing the pressing force. Can be suppressed.

A yarn winding machine according to a fourth aspect of the invention is characterized in that, in the third aspect of the invention, the yarn winding machine further includes an urging mechanism for urging the contact pressure applying roller toward the package.

For example, in a configuration in which contact pressure is applied to the package by urging the support arm toward the contact pressure applying roller, depending on the positional relationship between the package and the contact pressure applying roller, gravity acting on the package in addition to the urging force is applied. Can also affect the strength of contact pressure. In this case, it may be necessary to take into account the change in the weight of the package during the winding operation, which may make it difficult to control the contact pressure. In the present invention, since the contact pressure applying roller is urged toward the package, the strength of the contact pressure can be maintained constant by maintaining the urging force constant regardless of the weight of the package. That is, it is possible to eliminate the need to take into account changes in the weight of the package. Therefore, the contact pressure can be easily controlled.

A yarn winding machine according to a fifth invention is the above-described third or fourth invention, wherein a tension is applied to the yarn wound around the package, and the tension applying mechanism capable of changing the strength of the tension; And a contact pressure changing mechanism capable of changing the strength of the contact pressure.

Generally, the higher the tension of the wound yarn and the higher the contact pressure, the higher the density (hardness) of the package. For this reason, in the configuration in which the strength of tension and the strength of contact pressure can be changed as in the present invention, the yarn can be wound at a desired density. Here, the package rotates so that its surface follows the surface of the contact pressure applying roller. For example, when the density (hardness) of the package is increased, a large vibration is generated even if the package is slightly deformed from the ideal shape. There is a risk. In such a configuration, it is particularly effective that the strength of the pressing force can be changed during the winding operation and both the smooth movement of the support arm and the suppression of the vibration of the package can be achieved as in the present invention.

In the yarn winding machine according to a sixth aspect of the present invention, in any one of the first to fifth aspects, the contact surface of the vibration suppressing member that contacts the support arm extends along the predetermined direction. It is characterized by.

If the contact surface is inclined with respect to a predetermined direction (the movement direction of the support arm), the support arm is also pressed in the predetermined direction by the vibration suppressing member, and the support arm may move unintentionally in the predetermined direction. . In the present invention, since the contact surface is along the predetermined direction, the support arm can be prevented from being pressed in the predetermined direction by pressing the vibration suppressing member in a direction perpendicular to the contact surface, for example. Therefore, it can suppress that a support arm unintentionally moves to a predetermined direction.

In a yarn winding machine according to a seventh invention, in any one of the first to sixth inventions, the vibration suppressing member is rotatable about a rotation fulcrum fixed at a predetermined position. It is what.

In the present invention, the vibration suppressing member can be pressed strongly and stably against the support arm by utilizing the principle of the lever.

An eighth aspect of the present invention is the yarn winding machine according to any one of the first to seventh aspects, wherein the cradle device includes an arm driving unit that moves the support arm in the predetermined direction. is there.

In the present invention, when the support arm is moved by the arm drive unit, the support arm can be smoothly moved by weakening the pressing force (that is, weakening the frictional force). Further, when the support arm is not moved, there is no problem even if the pressing force is increased (that is, the frictional force is increased), so that the vibration of the support arm can be reliably suppressed by increasing the pressing force. Thus, by changing the strength of the pressing force in accordance with the operation of the arm drive unit, it is possible to effectively achieve both smooth movement of the support arm and suppression of package vibration.

In a yarn winding machine according to a ninth aspect based on any one of the first to eighth aspects, the support arm is in contact with the arm main body and the vibration suppressing member rotatably supported by the arm main body. And a contacted roller.

For example, in a configuration in which the portion of the support arm that contacts the vibration suppressing member is fixed to the arm body, the frictional force becomes too strong, and the support arm may not be smoothly moved. In the present invention, the support arm can be easily moved smoothly by the rotatable contacted roller.

A yarn winding machine according to a tenth invention is characterized in that, in any one of the first to ninth inventions, the support arm is capable of swinging about a swing fulcrum fixed at a predetermined position. To do.

For example, in the configuration in which the support arm is translated in a predetermined direction, it is necessary to secure a space for the translation, and the apparatus may be increased in size. In the present invention, the movement range of the support arm in the vicinity of the swing fulcrum can be reduced as compared with the configuration in which the support arm is moved in parallel. Therefore, an increase in the size of the apparatus can be suppressed.

A yarn winding machine according to an eleventh aspect of the present invention includes the control unit according to any one of the first to tenth aspects, wherein the control unit includes a first pressing force and the first pressing force during the winding operation. The strength of the pressing force is changed between the second pressing force weaker than the force.

In the present invention, by pressing the vibration suppressing member against the support arm with a relatively strong first pressing force, the frictional force can be kept strong and the vibration of the package can be suppressed. In addition, for example, by weakening the pressing force to the second pressing force at a predetermined cycle, it is possible to temporarily weaken the frictional force and reliably move the support arm in a predetermined direction. Therefore, the vibration of the package can be surely suppressed during normal times, and the support arm can be reliably and smoothly moved when the support arm is moved.

According to a twelfth aspect of the present invention, the yarn winding machine according to the eleventh aspect of the invention includes an arm driving unit that moves the support arm in the predetermined direction, and the control unit does not operate the arm driving unit. The strength of the pressing force is the first pressing force, and the strength of the pressing force is the second pressing force when the arm driving unit is operated.

In the present invention, when the support arm is not moved, there is no problem even if the pressing force is increased. Therefore, the vibration of the support arm can be reliably suppressed by the strong first pressing force. Further, when the support arm is moved, the strength of the pressing force is weakened by the second pressing force, so that the support arm can be reliably and smoothly moved. Therefore, the smooth movement of the support arm and the suppression of the vibration of the package can be effectively made compatible.

In a twelfth aspect of the present invention, a yarn winding machine according to a thirteenth aspect includes a package diameter detection unit that detects a change in the diameter of the package, and the control unit is based on a detection result by the package diameter detection unit, The operation of the arm drive unit is controlled.

In the present invention, the support arm can be appropriately moved according to the change in the diameter of the package.

According to a fourteenth aspect of the present invention, in the eleventh or twelfth aspect of the present invention, the yarn winding machine includes a storage unit that stores in advance a pattern related to a temporal change in the pressing force, and the control unit is configured to start the winding operation before starting. The above-mentioned pattern is read.

In the present invention, the smooth movement of the support arm and the suppression of the vibration of the package can both be achieved by a simple control of causing the control unit to read the pattern before the start of the winding operation.

According to a fifteenth aspect of the present invention, the yarn winding machine according to any one of the first to fourteenth aspects, further comprising: a vibration detection unit that detects vibration of the package; and a control unit, wherein the control unit is configured to detect the vibration. When the magnitude of the vibration of the package detected by the part is larger than a predetermined threshold, the pressing force is strengthened compared to when the magnitude of the vibration is smaller than the threshold. is there.

In the present invention, when the vibration of the package is equal to or less than a predetermined value, the pressing force is relatively weak (that is, the frictional force is relatively weak), so that the support arm can be easily moved smoothly. Further, when the vibration of the package is equal to or greater than a predetermined value, the pressing force is relatively strong (that is, the frictional force is relatively strong), so that the vibration of the package can be easily suppressed.

It is the schematic diagram which looked at the rewinder concerning this embodiment from the side. It is a figure which shows a winding part and its periphery structure. It is a figure which shows the electrical structure of a rewinder. (A)-(c) is explanatory drawing which shows a motion of the cradle arm and contact roller during winding operation | movement. It is a graph which shows the time change of operation | movement of the arm drive motor during winding operation | movement, the supply pressure of compressed air, and the angle of a cradle arm. It is a side view of the rewinder which concerns on a modification. It is a graph which shows the time change of operation | movement of the arm drive motor during winding operation | movement, the supply pressure of compressed air, and the angle of a cradle arm. It is a graph which shows the time change of the supply pressure of the compressed air which concerns on another modification. It is a side view of the yarn winding device according to yet another modification. It is a graph which shows the time change of the supply pressure of compressed air.

Next, an embodiment of the present invention will be described with reference to FIGS. The up-down direction and the front-rear direction shown in FIG. 1 are the up-down direction and the front-rear direction of the rewinder 1, respectively. A direction (vertical direction in FIG. 1) perpendicular to both the vertical direction and the front-rear direction is defined as the axial direction of the bobbin B. The direction in which the yarn Y travels is defined as the yarn traveling direction.

(Composition of rewinder)
First, the configuration of the rewinder 1 (the yarn winding machine of the present invention) according to the present embodiment will be described with reference to FIG. FIG. 1 is a schematic view of the rewinder 1 as viewed from the side. As shown in FIG. 1, the rewinder 1 includes a yarn supplying unit 11, a winding unit 12, a control device 13 (a control unit of the present invention), and the like. The rewinder 1 is used to form the winding package Pw (the package of the present invention) by winding the yarn Y wound around the yarn supplying package Ps supported by the yarn supplying unit 11 back onto the bobbin B by the winding unit 12. It is. More specifically, the rewinder 1 is for, for example, rewinding the yarn Y wound around the yarn supply package Ps more neatly or forming the winding package Pw having a desired density (for details, see FIG. Will be described later).

The yarn supplying section 11 is attached to, for example, the front surface of the lower portion of the upright machine base 14. The yarn supplying section 11 is configured to be able to support the yarn supplying package Ps around which the yarn Y is wound. Thereby, the yarn supplying section 11 can supply the yarn Y.

The winding unit 12 is for winding the yarn Y around the bobbin B to form the winding package Pw. The winding unit 12 is provided in the upper part of the machine base 14. The winding unit 12 includes a cradle device 21 and a contact roller 22 (contact pressure applying roller of the present invention).

The cradle device 21 is for rotatably supporting the bobbin B. The cradle device 21 has a cradle arm 31 (support arm of the present invention) that is supported by the machine base 14 so as to be swingable and supports the bobbin B so as to be rotatable. A bobbin holder (not shown) that holds the bobbin B is rotatably attached to the tip of the cradle arm 31. The bobbin holder is rotationally driven by a winding motor 32. The winding motor 32 is, for example, a general AC motor, and is configured to be able to change the rotation speed. Thereby, the winding motor 32 can change the rotation speed of the bobbin B. The winding motor 32 is electrically connected to the control device 13 (see FIG. 3).

The contact roller 22 is for adjusting the shape of the winding package Pw by applying contact pressure to the surface of the winding package Pw. The contact roller 22 is rotatably supported by a swing rod 23 with the axial direction of the bobbin B as the rotational axis direction. The swing rod 23 is swingably attached to the machine base 14 with the axial direction of the bobbin B as the swing axis direction. The contact roller 22 contacts the take-up package Pw and rotates following the rotation of the take-up package Pw.

A traverse guide 24 is arranged in the vicinity of the contact roller 22 (immediately upstream of the winding package Pw in the yarn traveling direction). The traverse guide 24 is reciprocated in the axial direction of the bobbin B by a drive device (not shown), and traverses the yarn Y.

In the yarn traveling direction, a guide roller 15 and a tension sensor 16 are arranged between the yarn supplying unit 11 and the winding unit 12 in order from the upstream side. The guide roller 15 is for guiding the yarn Y unwound from the yarn supply package Ps to the downstream side in the yarn traveling direction. The guide roller 15 is disposed on the front surface of the machine base 14 and above the yarn supplying section 11. The guide roller 15 is rotationally driven by, for example, a roller drive motor 17. The roller drive motor 17 is, for example, a general AC motor, and is configured to be able to change the rotation speed. Thereby, the roller drive motor 17 can change the rotational speed of the guide roller 15. The roller drive motor 17 is electrically connected to the control device 13 (see FIG. 3).

The yarn Y traveling between the winding package Pw and the guide roller 15 in the yarn traveling direction gives a circumferential speed difference between the winding package Pw and the guide roller 15 (the winding package Pw rotates faster than the guide roller 15). A predetermined tension is applied. The tension changes in accordance with the peripheral speed difference between the winding package Pw that is rotationally driven by the winding motor 32 and the guide roller 15 that is rotationally driven by the roller driving motor 17 (the larger the peripheral speed difference, the more tension is applied). Becomes stronger). In this way, the tension applied to the yarn Y can be changed. The winding motor 32 and the roller drive motor 17 correspond to the tension applying mechanism of the present invention.

The tension sensor 16 is disposed between the winding package Pw and the guide roller 15 in the yarn traveling direction, and detects the tension applied to the yarn Y. The tension sensor 16 is electrically connected to the control device 13 (see FIG. 3), and sends a tension detection result to the control device 13.

The control device 13 includes a CPU, a ROM, a RAM (storage unit 18), and the like. The storage unit 18 stores, for example, parameters such as the winding amount and winding speed of the yarn Y, and the strength of the tension applied to the yarn Y. The control device 13 controls each unit by the CPU in accordance with a program stored in the ROM based on parameters and the like stored in the RAM (storage unit 18).

(Configuration of winding part)
Next, a more detailed configuration of the winding unit 12 will be described with reference to FIG. FIG. 2 is a diagram illustrating the winding unit 12 and its peripheral configuration. As described above, the winding unit 12 includes the cradle device 21 and the contact roller 22. The cradle arm 31 of the cradle device 21 supports, for example, the bobbin B so as to be rotatable from both sides in the axial direction. Alternatively, the cradle arm 31 may support the bobbin B from one side in the axial direction. The cradle arm 31 includes an arm main body 33 and a contacted roller 34.

The arm body 33 is a member extending in a direction orthogonal to the axial direction of the bobbin B. The arm main body 33 is supported so as to be swingable around a swinging fulcrum 35 attached to a predetermined position of the machine base 14 (position is fixed with respect to the machine base 14). The swing axis direction of the arm body 33 is substantially parallel to the axial direction of the bobbin B, for example. The arm body 33 is driven to swing in a predetermined direction (moving direction shown in FIG. 2) perpendicular to the axial direction of the bobbin B by an arm driving motor 37 (arm driving unit of the present invention) via an endless belt 36, for example. The That is, when the arm body 33 is viewed from the axial direction, the angle θ can be changed by the arm drive motor 37 when the angle formed between the vertical line and the center line of the arm body 33 is the angle θ. The arm drive motor 37 is electrically connected to the control device 13 (see FIG. 3). Note that the movement direction of the arm main body 33 does not necessarily have to be orthogonal to the axial direction of the bobbin B, as long as it intersects the axial direction of the bobbin B.

The contact roller 34 is a roller member that is rotatably attached to an intermediate portion in the extending direction of the arm body 33. The rotational axis direction of the contact roller 34 is substantially parallel to the axial direction of the bobbin B. A vibration suppression lever 41 (a vibration suppression member of the present invention) is in contact with the contacted roller 34.

The vibration suppression lever 41 is for suppressing the vibration of the winding package Pw by suppressing the vibration of the cradle arm 31. The vibration of the winding package Pw is caused by, for example, vibration of the cradle arm 31 caused by the operation of the winding motor 32 or the like, slight deformation of the winding package Pw (deviation from an ideal circular shape), or the like. Occur. When the winding package Pw vibrates, the winding package Pw may be further deformed, and the shape of the winding package Pw may be broken. Therefore, a vibration suppression lever 41 is provided to suppress the vibration of the winding package Pw. The vibration suppression lever 41 is a long member that is curved in an arc. The vibration suppression lever 41 is supported so as to be rotatable about a rotation fulcrum 42 attached to a predetermined position of the machine base 14 (position is fixed with respect to the machine base 14). The rotation axis direction of the vibration suppression lever 41 is substantially parallel to the axial direction of the bobbin B, for example. A contact surface 43 (see a thick line) that contacts the cradle arm 31 of the vibration suppression lever 41 extends in an arc shape around the rotation fulcrum 42 when viewed from the axial direction of the bobbin B. In other words, the contact surface 43 extends along a predetermined direction (the moving direction of the cradle arm 31).

The vibration suppression lever 41 is pressed against the contacted roller 34 by a pressing mechanism 61 described later. Thereby, a frictional force acts between the vibration suppression lever 41 and the contacted roller 34. Due to this frictional force, vibration of the cradle arm 31 is suppressed, and vibration of the winding package Pw is suppressed. The direction in which the vibration suppression lever 41 is pressed against the contacted roller 34 (pressing direction) is perpendicular to the contact surface 43 (see arrow 101 in FIG. 2). Thereby, it is avoided that the cradle arm 31 is pressed in a predetermined direction. Accordingly, unintentional movement of the cradle arm 31 in a predetermined direction is suppressed. Further, the lever principle is used in which the rotation fulcrum 42 is a fulcrum, the connection portion of the vibration suppression lever 41 with the piston rod 64 is a force point, and the portion of the vibration suppression lever 41 that is in contact with the contacted roller 34 is the application point. As a result, the vibration suppression lever 41 is strongly and stably pressed against the contacted roller 34.

The contact roller 22 is rotatably supported by the swing rod 23 as described above. The swing rod 23 is supported by the machine base 14 so as to be swingable (see arrow 102 in FIG. 2). The contact roller 22 can swing according to a change in the diameter of the winding package Pw. Specifically, the contact roller 22 has an axial center of the bobbin B in the radial direction of the winding package Pw in response to an increase in the diameter (winding) of the winding package Pw due to the yarn Y being wound around the bobbin B. Swing in the direction away from. The swing rod 23 is urged toward the winding package Pw by the urging mechanism 51 (that is, in a direction in which the contact roller 22 is pressed against the winding package Pw).

The urging mechanism 51 includes, for example, an air cylinder 52 and an electropneumatic regulator 53 (contact pressure changing mechanism of the present invention). The urging mechanism 51 can change the contact pressure according to the pressure of the compressed air supplied to the air cylinder 52. The air cylinder 52 is, for example, a general extrusion type cylinder. The piston rod 54 of the air cylinder 52 is connected to the swing rod 23. The air cylinder 52 is connected to a supply port (not shown) connected to a compressed air supply source and an exhaust port (not shown) through which air is discharged via a pipe. The electropneumatic regulator 53 is provided between the supply port and the discharge port and the air cylinder 52. The electropneumatic regulator 53 includes, for example, a plurality of solenoid valves, a pressure gauge, and a control device, and is configured to be able to adjust the pressure of the compressed air supplied to the air cylinder 52. The electropneumatic regulator 53 is electrically connected to the control device 13 (see FIG. 3). The compressed air whose pressure is adjusted by the electropneumatic regulator 53 is supplied to the air cylinder 52 through the supply pipe 55. As a result, the swing rod 23 is pushed by the piston rod 54 (see arrow 103 in FIG. 2), and the contact roller 22 is urged toward the winding package Pw. In this way, contact pressure is applied to the winding package Pw.

In the vicinity of the contact roller 22, a proximity sensor 56 (package diameter detection unit of the present invention) for detecting the approach of the contact roller 22 is disposed. The proximity sensor 56 is, for example, a capacitive non-contact sensor, but is not limited to this. The proximity sensor 56 is disposed outside the swing range of the contact roller 22 (in FIG. 2, behind the contact roller 22). The proximity sensor 56 is electrically connected to the control device 13 (see FIG. 3). When the distance between the proximity sensor 56 and the contact roller 22 becomes a predetermined distance or less, the proximity sensor 56 detects the approach of the contact roller 22 and sends a detection signal to the control device 13.

(Winding operation)
The winding operation of the yarn Y in the rewinder 1 having the above configuration will be described with reference to FIGS. 4 (a) to 4 (c). 4A to 4C are explanatory views showing the movement of the cradle arm 31 and the contact roller 22 during the winding operation.

First, in a state where the yarn Y is connected between the yarn supply package Ps and the winding package Pw (see FIG. 1), the control device 13 (see FIG. 3) controls the winding motor 32 and the roller drive motor 17. The bobbin B and the guide roller 15 are rotated by control. As a result, the yarn Y is wound around the bobbin B (see FIG. 4A). The control device 13 operates the winding motor 32 and the roller driving motor 17 so that the circumferential speed of the winding package Pw is faster than the circumferential speed of the guide roller 15. The tension of the yarn Y increases as the difference in peripheral speed between the winding package Pw and the guide roller 15 increases. Further, the control device 13 controls the electropneumatic regulator 53 to keep the pressure of the compressed air supplied to the air cylinder 52 at a predetermined level. As a result, the contact roller 22 is biased with a predetermined force against the winding package Pw, and a contact pressure is applied to the surface of the winding package Pw by the contact roller 22. Generally, the higher the tension of the yarn Y and the stronger the contact pressure, the higher the density (hardness) of the winding package Pw.

As the yarn Y is wound around the bobbin B and the diameter of the winding package Pw increases (the winding package Pw becomes thicker), the contact roller 22 is pushed by the surface of the winding package Pw, and the winding package Pw It moves radially outward (see arrow 105 in FIG. 4B). When the distance between the contact roller 22 and the proximity sensor 56 becomes a predetermined distance or less, the proximity sensor 56 detects the approach of the contact roller 22 and sends a detection signal to the control device 13. In other words, the proximity sensor 56 detects a change in the diameter of the winding package Pw. When receiving the detection signal from the proximity sensor 56, the control device 13 controls the arm drive motor 37 to swing the cradle arm 31 by a predetermined angle. Thereby, the axial center of the bobbin B moves away from the axial center of the contact roller 22 in the radial direction of the winding package Pw (see the arrow 106 in FIG. 4C). Then, the swing rod 23 swings following the movement of the winding package Pw, and the contact roller 22 moves away from the proximity sensor 56 (see arrow 107 in FIG. 4C). When the winding package Pw is further thickened, the contact roller 22 approaches the proximity sensor 56 again. Thus, the contact roller 22 reciprocates. By repeating the above operation, the angle θ (see FIG. 2) increases as the winding package Pw becomes thicker.

During the winding operation, the vibration suppression lever 41 is pressed against the contacted roller 34 by the pressing mechanism 61, so that a frictional force acts between the vibration suppression lever 41 and the contacted roller 34. Thereby, the vibration of the cradle arm 31 is suppressed and the vibration of the winding package Pw is suppressed. Here, conventionally, the vibration suppressing lever 41 is urged by a spring, and the urging force has not been positively changed during the winding operation. For this reason, when the biasing force of the spring is set to be strong in order to reliably suppress the vibration, the frictional force becomes too strong, and there is a possibility that the above-described swinging of the cradle arm 31 is difficult to be performed smoothly. On the contrary, when the biasing force of the spring is set to be weak so that the cradle arm 31 swings smoothly, the frictional force becomes too weak and the suppression of the vibration of the winding package Pw may be insufficient. there were. In particular, when the density (hardness) of the winding package Pw is increased, there is a problem that vibration is likely to occur remarkably, and the pressing force by the pressing mechanism 61 is required to be increased. However, in this case, the pressing force required to sufficiently suppress the vibration of the winding package Pw may be significantly stronger than the pressing force that allows the cradle arm 31 to swing smoothly. In such a situation, there is a possibility that it is impossible to achieve both the smooth swing of the cradle arm 31 and the suppression of the vibration of the winding package Pw. Therefore, in the present embodiment, the pressing mechanism 61 has the following configuration in order to achieve both smooth swinging of the cradle arm 31 and suppression of vibration of the winding package Pw.

(Configuration of pressing mechanism)
Returning to FIG. 2, the configuration of the pressing mechanism 61 will be described. The pressing mechanism 61 includes, for example, an air cylinder 62 (fluid pressure cylinder of the present invention) and an electropneumatic regulator 63. The air cylinder 62 is, for example, a general retractable cylinder. The air cylinder 62 is attached to the machine base 14. The tip of the piston rod 64 of the air cylinder 62 is connected to the end of the vibration suppression lever 41. In the present embodiment, the connection portion of the vibration suppression lever 41 with the piston rod 64 is disposed on the opposite side of the portion where the contact surface 43 is formed with the rotation fulcrum 42 interposed therebetween, but the present invention is not limited to this. is not. The air cylinder 62 is connected to a supply port (not shown) connected to a compressed air supply source and an exhaust port (not shown) through which air is discharged via a pipe. Since the air cylinder 62 generally has a cushioning property, even if the vibration suppressing lever 41 vibrates, the vibration is absorbed and the fluctuation of the pressing force is suppressed.

The electropneumatic regulator 63 is provided between the supply port and the discharge port and the air cylinder 62. The electropneumatic regulator 63 includes, for example, a plurality of solenoid valves, a pressure gauge, and a control device, and is configured to be able to adjust the pressure of the compressed air supplied to the air cylinder 62. The electropneumatic regulator 63 is electrically connected to the control device 13 (see FIG. 3). The compressed air whose pressure is adjusted by the electropneumatic regulator 63 is supplied to the air cylinder 62 through the supply pipe 65. Thereby, the vibration suppression lever 41 is pulled by the piston rod 64 (see the arrow 104 in FIG. 2), and the contact surface 43 is pressed against the contacted roller 34. The strength of the pressing force changes according to the pressure of the compressed air supplied to the air cylinder 62. That is, the higher the pressure of the supplied compressed air, the stronger the pressing force. Thus, the pressing mechanism 61 can change the strength of the pressing force during the winding operation of the yarn Y.

(Control of pressing force during winding operation)
Next, the control of the pressing force during the winding operation will be described with reference to FIGS. 4 (a) to 4 (c) and FIG. FIG. 5 is a graph showing the time change of the operation of the arm drive motor 37 during the winding operation, the pressure of the compressed air supplied to the air cylinder 62, and the angle of the cradle arm 31.

As an initial state, a winding operation is performed in which the control device 13 rotates the winding motor 32 to wind the yarn Y around the bobbin B. Further, time t = t0 (see FIGS. 4A and 5). At this time, the arm drive motor 37 stops operating (see “OFF” in FIG. 5), and the cradle arm 31 stops at a predetermined position. That is, the above-described angle θ is kept constant (θ = θ1, see FIGS. 4A and 5). The pressure of the compressed air supplied to the air cylinder 62 is a predetermined value (P1) (see FIG. 5), and the vibration suppression lever 41 is pressed against the contacted roller 34 with a predetermined first pressing force. ing.

From this state, as described above, the yarn Y is wound around the bobbin B, the diameter of the winding package Pw increases, and the contact roller 22 swings. When the proximity sensor 56 detects the approach of the contact roller 22, a detection signal is sent to the control device 13. The time at this time is t = t1 (see FIG. 4B and FIG. 5). The control device 13 operates the arm drive motor 37 based on the detection result by the proximity sensor 56 (see “ON” in FIG. 5), and swings the cradle arm 31. At the same time, the control device 13 controls the electropneumatic regulator 63 (see FIG. 2) to lower the pressure of the compressed air supplied to the air cylinder 62 from P1 to P2 (<P1) (see FIG. 5). Thereby, the strength of the pressing force changes to a second pressing force that is weaker than the first pressing force. Thus, during the winding operation of the yarn Y, the strength of the pressing force by the pressing mechanism 61 is changed. As a result, the frictional force acting between the vibration suppression lever 41 and the contacted roller 34 is temporarily weakened, and the cradle arm 31 swings smoothly.

Thereafter, when the angle θ of the cradle arm 31 becomes θ = θ2 (> θ1), the control device 13 stops the operation of the arm drive motor 37 (see FIG. 4C and FIG. 5). Time is t = t2.) At the same time, the control device 13 controls the electropneumatic regulator 63 to return the pressure of the compressed air supplied to the air cylinder 62 from P2 to P1. Thereby, the strength of the pressing force returns from the second pressing force to the first pressing force, and the vibration of the cradle arm 31 is suppressed again by a strong frictional force. Thus, the control device 13 controls the pressing mechanism 61 to change the strength of the pressing force between the first pressing force and the second pressing force. By repeating the above operation, both the smooth swing of the cradle arm 31 and the suppression of the vibration of the winding package Pw due to the suppression of the vibration of the cradle arm 31 can be achieved during the winding operation of the yarn Y.

As described above, when the vibration suppression lever 41 is pressed against the cradle arm 31 by the pressing mechanism 61, a frictional force acts between the vibration suppression lever 41 and the cradle arm 31. Thereby, the vibration of the cradle arm 31 is suppressed and the vibration of the winding package Pw is suppressed. Furthermore, the pressing mechanism 61 can change the strength of the pressing force during the winding operation. That is, the frictional force can be changed during the winding operation. For this reason, when it is desired to move the cradle arm 31 in a predetermined direction, the cradle arm 31 can be reliably moved smoothly by reducing the frictional force. Further, when it is desired to suppress the vibration of the winding package Pw, the vibration of the cradle arm 31 can be reliably suppressed by increasing the frictional force. Therefore, both the smooth movement of the cradle arm 31 and the suppression of the vibration of the winding package Pw can be achieved.

Further, since the pressing mechanism 61 has the air cylinder 62, the strength of the pressing force itself can be changed by changing the supply pressure of the compressed air. Further, since the air cylinder 62 generally has a cushioning property, even if the vibration suppression lever 41 vibrates, it can absorb the vibration and suppress the fluctuation of the pressing force. Therefore, destabilization of the pressing force can be suppressed.

Further, in the configuration in which the winding package Pw rotates while being in contact with the contact roller 22, the winding package Pw rotates so that the surface thereof is along the surface of the contact roller 22. For this reason, depending on the hardness (density) of the winding package Pw, a large vibration may occur even if the winding package Pw is slightly deformed from the ideal shape. In such a configuration, the strength of the pressing force can be changed, and it is effective to achieve both the smooth movement of the cradle arm 31 and the suppression of the vibration of the winding package Pw.

Further, in a configuration in which both the cradle arm 31 and the contact roller 22 are movable, the movement of the cradle arm 31 and the contact roller 22 may become unstable, and the winding package Pw may easily vibrate. In the present invention, since the strength of the pressing force can be changed during the winding operation, even if the movement of the cradle arm 31 or the contact roller 22 becomes unstable, the pressing package is made stronger by increasing the pressing force. Vibration can be reliably suppressed.

Further, since the contact roller 22 is biased toward the winding package Pw, the strength of the contact pressure can be maintained constant by maintaining the biasing force constant regardless of the weight of the winding package Pw. That is, it is possible to eliminate the need to take into account the weight change of the winding package Pw. Therefore, the contact pressure can be easily controlled.

Further, in a configuration in which the strength of tension and the strength of contact pressure can be changed, the yarn Y can be wound at a desired density. Here, for example, when the density (hardness) of the winding package Pw is increased, a large vibration may occur even if the winding package Pw is slightly deformed from the ideal shape. In such a configuration, it is particularly effective that the strength of the pressing force can be changed during the winding operation and both the smooth movement of the cradle arm 31 and the suppression of the vibration of the winding package Pw can be achieved.

Further, since the contact surface 43 of the vibration suppression lever 41 is along the predetermined direction, for example, by pressing the vibration suppression lever 41 in a direction perpendicular to the contact surface 43, the cradle arm 31 is pressed in the predetermined direction. Can be avoided. Therefore, the cradle arm 31 can be prevented from moving in a predetermined direction unintentionally.

Further, the vibration suppression lever 41 can be rotated around the rotation fulcrum 42. Thereby, the vibration suppression lever 41 can be strongly and stably pressed against the cradle arm 31 by utilizing the lever principle.

Further, when the cradle arm 31 is moved by the arm drive motor 37, the cradle arm 31 can be smoothly moved by weakening the pressing force (that is, reducing the frictional force). Further, when the cradle arm 31 is not moved, there is no problem even if the pressing force is increased (that is, the frictional force is increased), so that the vibration of the cradle arm 31 is reliably suppressed by increasing the pressing force. it can. Thus, by changing the strength of the pressing force in accordance with the operation of the arm drive motor 37, it is possible to effectively achieve both the smooth movement of the cradle arm 31 and the suppression of the vibration of the winding package Pw.

Also, the cradle arm 31 can be easily moved smoothly by the rotatable contact roller 34.

In addition, the cradle arm 31 can swing around the swing fulcrum 35. For this reason, the movement range of the vicinity of the swing fulcrum of the cradle arm 31 can be reduced. Therefore, compared with the configuration in which the cradle arm 31 is moved in parallel, an increase in the size of the apparatus can be suppressed.

Also, the control device 13 changes the strength of the pressing force between the first pressing force and the second pressing force during the winding operation. That is, when the cradle arm 31 is not rocked, the frictional force is kept strong by pressing the vibration suppression lever 41 against the cradle arm 31 with a relatively strong first pressing force, and the vibration of the winding package Pw can be suppressed. Further, when the cradle arm 31 is swung, by temporarily weakening the pressing force to the second pressing force, the frictional force can be temporarily weakened and the cradle arm 31 can be swung reliably in a predetermined direction. Therefore, it is possible to reliably suppress the vibration of the winding package Pw at the normal time and to move the cradle arm 31 smoothly and smoothly when the cradle arm 31 swings. In this way, smooth movement of the cradle arm 31 and suppression of vibration of the winding package Pw can be effectively made compatible.

Further, the control device 13 controls the operation of the arm drive motor 37 based on the detection result of the proximity sensor 56. For this reason, the cradle arm 31 can be appropriately swung according to a change in the diameter of the winding package Pw.

Next, a modified example in which the above embodiment is modified will be described. However, components having the same configuration as in the above embodiment are given the same reference numerals and description thereof is omitted as appropriate.

(1) In addition to the configuration of the above-described embodiment, for example, as shown in FIG. 6, in the winding unit 12 a of the rewinder 1 a, even if the cradle device 21 a includes the vibration sensor 71 (vibration detection unit of the present invention). good. An example of the vibration sensor 71 includes a capacitance type acceleration sensor attached to the cradle arm 31, but is not limited thereto. The vibration sensor 71 is electrically connected to the control device 13 and, for example, sends a detection signal corresponding to the magnitude of vibration to the control device 13.

Control performed by the control device 13 in the rewinder 1a having the above configuration will be described with reference to the graph of FIG. As shown in FIG. 7, when the magnitude of vibration detected by the vibration sensor 71 is smaller than a predetermined threshold, the control device 13 controls the pressure of the compressed air supplied to the air cylinder 62 as in the above embodiment. Is changed between P1 and P2. On the other hand, when the magnitude of the vibration is larger than the threshold value, the control device 13 controls the electropneumatic regulator 63 to set the pressure of the compressed air supplied to the air cylinder 62 to P3 larger than P1. That is, when the magnitude of vibration is larger than the threshold value, the pressing force described above becomes stronger than when the magnitude of vibration is smaller than the threshold value. When the magnitude of the vibration becomes smaller than the threshold value again, the control device 13 reduces the pressure of the compressed air again. Thereby, when the vibration of the winding package Pw is small, the frictional force is relatively weak, so that the cradle arm 31 can be easily moved smoothly. Further, when the vibration of the winding package Pw becomes large, the frictional force is relatively strong, so that the vibration of the winding package Pw can be easily suppressed.

(2) In the modified example of (1), the supply pressure of compressed air is changed both when the arm drive motor 37 operates and when the magnitude of vibration exceeds a predetermined threshold. However, it is not limited to this. As shown in the graph of FIG. 8, for example, when the magnitude of vibration is smaller than the threshold value, the pressure of the compressed air supplied to the air cylinder 62 is maintained at P1a (for example, lower than P1 described above), and the cradle The arm 31 may be easily swung smoothly. Also, the vibration of the winding package Pw may be easily suppressed by setting the supply pressure of the compressed air to P2a higher than P1a only when the magnitude of vibration becomes larger than the threshold value.

(3) In the embodiments described above, the cradle arm 31 is driven to swing by the arm drive motor 37 and the contact roller 22 is configured to be driven and swingable. Absent. For example, as shown in FIG. 9, the position of the contact roller 81 with respect to the machine base 14 is fixed in the winding part 12b of the rewinder 1b, and the cradle arm 31 is configured to be able to swing freely in the cradle device 21b. May be. Specifically, the contact roller 81 may be rotatably supported by a support member 82 fixed to the machine base 14. Further, the contact roller 81 may be rotationally driven by a motor 83. In other words, the winding package Pw may be configured to rotate following the rotation of the contact roller 22.

In the rewinder 1b having the above configuration, the control device 13 may perform the following control. For example, the storage unit 18 may store in advance a pattern (see FIG. 10) relating to the temporal change in the pressure of the compressed air supplied to the air cylinder 62. More specifically, this pattern is a pattern related to the time change of the pressure from the start to the end of winding of the winding package Pw. And the control apparatus 13 may read the said pattern from the memory | storage part 18 before the start of winding operation | movement, and may change pressing force by this by time. In this way, it is possible to achieve both smooth movement of the cradle arm 31 and suppression of vibration of the winding package Pw by simple control.

(4) In the above embodiments, the cradle arm 31 and the like are configured to be swingable. However, the present invention is not limited to this. For example, the cradle arm 31 may be configured to be movable in parallel. Specifically, the cradle arm 31 may be translated using a general ball screw mechanism, a rack and pinion mechanism, or the like.

(5) In the embodiments described above, the vibration suppressing lever 41 is configured to be rotatable. However, the present invention is not limited to this. For example, a configuration in which a vibration suppressing member (not shown) having an arcuate contact surface is simply pressed against the cradle arm 31 by an air cylinder or the like may be used.

(6) In the above-described embodiments, the vibration suppression lever 41 is pressed against the contact roller 34 of the cradle arm 31. However, the present invention is not limited to this. For example, the cradle arm 31 may have a convex portion (not shown) protruding in the axial direction from the arm body 33, and the vibration suppression lever 41 may be pressed against the convex portion.

(7) In the above-described embodiments, the pressure of the compressed air supplied to the air cylinder 62 is adjusted by the electropneumatic regulator 63. However, the present invention is not limited to this. Instead of the electropneumatic regulator 63, the pressure of the compressed air may be adjusted using, for example, a general control valve (not shown) such as a globe valve and a pressure controller (not shown). That is, it is only necessary that the pressing mechanism 61 is configured to change the pressing force.

(8) In the embodiments described above, the vibration suppression lever 41 is pressed against the cradle arm 31 by the air cylinder 62, but the present invention is not limited to this. For example, a gas such as nitrogen may be supplied to the air cylinder 62 instead of compressed air. Further, a hydraulic cylinder or the like may be used instead of the air cylinder. That is, you may apply the fluid pressure cylinder from which the strength of pressing force changes according to the pressure of a fluid. Alternatively, the vibration suppressing lever 41 may be pressed against the cradle arm 31 by an electric mechanism or device such as a general ball screw mechanism or a linear actuator instead of the fluid pressure cylinder.

(9) In the above-described embodiments, the proximity sensor 56 detects the increase (winding thickness) of the winding package Pw. However, the present invention is not limited to this. For example, an image of the winding package Pw may be captured by a photographing unit (not shown), and the control device 13 may perform image analysis to calculate the diameter of the winding package Pw. That is, any configuration may be used as long as a change in the diameter of the winding package Pw can be detected.

(10) The guide roller 15 is not necessarily rotated by the roller drive motor 17. As an example, a so-called torque limiter may be incorporated in the guide roller 15 so that the guide roller 15 can be driven and rotated, and the magnitude of torque necessary for the driven rotation can be adjusted. In this case, the winding motor 32 and the guide roller 15 correspond to the tension applying mechanism of the present invention.

(11) The present invention is also applicable to a yarn winding machine other than a rewinder. That is, the present invention may be applied to various yarn winding machines that wind a yarn around a bobbin to form a package. As an example, the present invention may be applied to a winding device of a false twisting machine described in Japanese Patent Application Laid-Open No. 2016-2223034. In this case, the winding device corresponds to the yarn winding machine of the present invention.

1 Rewinder (yarn winding machine)
13 Control device (control unit)
17 Roller drive motor (tensioning mechanism)
18 Storage Unit 21 Cradle Device 22 Contact Roller (Contact Pressure Applying Roller)
31 Cradle arm (support arm)
32 Winding motor (tensioning mechanism)
33 Arm body 34 Contacted roller 35 Oscillating fulcrum 37 Arm drive motor (arm drive unit)
41 Vibration suppression lever (vibration suppression member)
42 Rotating fulcrum 43 Contact surface 51 Biasing mechanism 53 Electropneumatic regulator (contact pressure changing mechanism)
56 Proximity sensor (package diameter detector)
61 Pressing mechanism 62 Air cylinder (fluid pressure cylinder)
71 Vibration sensor (vibration detector)
B Bobbin Pw Winding package (package)
Y thread

Claims

A yarn winding machine that winds a thread around a bobbin to form a package,
A cradle device having a support arm that rotatably supports the bobbin, and capable of moving the support arm in a predetermined direction intersecting an axial direction of the bobbin;
A vibration suppressing member that suppresses vibration of the support arm by being pressed against the support arm;
A pressing mechanism for pressing the vibration suppression member against the support arm,
The yarn winding machine, wherein the pressing mechanism can change the strength of the pressing force during the yarn winding operation.
The yarn winding machine according to claim 1, wherein the pressing mechanism has a fluid pressure cylinder in which the strength of the pressing force changes according to the pressure of the fluid supplied.
A contact pressure applying roller that applies a contact pressure to the rotating package;
The yarn winding machine according to claim 1 or 2, wherein the contact pressure applying roller is movable with a change in the diameter of the package.
The yarn winding machine according to claim 3, further comprising a biasing mechanism that biases the contact pressure applying roller toward the package.
A tension applying mechanism that applies tension to the yarn wound around the package and can change the strength of the tension;
The yarn winding machine according to claim 3 or 4, further comprising a contact pressure changing mechanism capable of changing the strength of the contact pressure.
The yarn winding machine according to any one of claims 1 to 5, wherein a contact surface of the vibration suppressing member that contacts the support arm extends along the predetermined direction.
The yarn winding machine according to any one of claims 1 to 6, wherein the vibration suppressing member is rotatable about a rotation fulcrum fixed at a predetermined position.
The yarn winding machine according to any one of claims 1 to 7, wherein the cradle device includes an arm driving unit that moves the support arm in the predetermined direction.
The support arm is
The arm body,
The yarn winding machine according to any one of claims 1 to 8, further comprising a contacted roller rotatably supported by the arm main body and in contact with the vibration suppressing member.
The yarn winding machine according to any one of claims 1 to 9, wherein the support arm is swingable about a swing support point fixed at a predetermined position.
With a control unit,
The said control part changes the strength of the said pressing force between the 1st pressing force and the 2nd pressing force weaker than the said 1st pressing force during the said winding operation | movement. Item 11. A yarn winding machine according to any one of Items 1 to 10.
An arm drive unit that moves the support arm in the predetermined direction,
The controller is
When the arm driving unit is not operated, the strength of the pressing force is the first pressing force,
The yarn winding machine according to claim 11, wherein when the arm driving unit is operated, the strength of the pressing force is set to the second pressing force.
A package diameter detector for detecting a change in the diameter of the package;
The yarn winding machine according to claim 12, wherein the control unit controls the operation of the arm driving unit based on a detection result by the package diameter detection unit.
A storage unit that stores in advance a pattern related to the temporal change of the pressing force;
The yarn winding machine according to claim 11 or 12, wherein the control unit reads the pattern before starting the winding operation.
A vibration detector for detecting vibration of the package;
A control unit,
The controller is
When the magnitude of the vibration of the package detected by the vibration detector is larger than a predetermined threshold, the pressing force is strengthened compared to when the magnitude of the vibration is smaller than the threshold. The yarn winding machine according to any one of claims 1 to 14.