spinning machine

Abstract

A spinning machine (1) is provided with: an air spinning device (7); a winding device (14); a yarn storage device (11); a traversing device (13); a drive motor (23) that rotates one package (P) in the winding device (14); a winding speed acquisition section that acquires a winding speed of a yarn (Y) wound to the package (P); and a unit controller (10) that controls the traversing device (13) and the drive motor (23) based on a number of revolutions of the package (P) and the winding speed to control a winding number and a twill angle of the package (P).

Description

TECHNICAL FIELD

[0001] The present application relates to a spinning machine. BACKGROUND

[0002] A spinning machine is provided with: an air spinning device that generates a yarn using an air flow; a winding device that winds the yarn generated by the air spinning device to form a package; a yarn accumulation device that is arranged between the air spinning device and the winding device, temporarily accumulates the yarn delivered from the air spinning device, and delivers it to the winding device; and a driving section that rotates the package in the winding device (for example, refer to Japanese Patent Application Publication No. 2019-104596).

[0003] As one index of the quality of the package formed by the spinning machine, there is the unwinding property of the yarn in the post-process. The post-process refers to a process performed on the package after it is formed by the spinning machine, using a machine other than the spinning machine. As a main cause of the reduction in the unwinding property of the yarn, there are the laps (overlapping windings) in which the yarn is wound in the same trajectory on the peripheral surface of the package, the latching in which excess tension is applied to the yarn due to the entanglement of the pile, and the like. By forming the package in a winding form of a specific number of winds, laps and slippage due to the laps can be avoided. In addition, as a main cause of the reduction in the unwinding property of the yarn, there is the unwinding tension (average unwinding tension). If the unwinding tension is different in one package, a yarn breakage can occur when the yarn is unwound. Thus, even if laps and latching can be avoided, the quality of the package is reduced because the unwinding property is reduced if the unwinding tension is different in one package. SUMMARY

[0004] An object of one aspect of the present application is to provide a spinning machine capable of improving the quality of a package.

[0005] A spinning machine of one aspect of the present application is provided with: a spinning device that generates a yarn; a winding device that winds the yarn generated by the spinning device to form a package; a yarn accumulation device that is arranged between the spinning device and the winding device, temporarily accumulates the yarn continuously delivered from the spinning device, and delivers it to the winding device; a traversing device that is arranged between the yarn accumulation device and the winding device, traverses the yarn wound to one package; a driving section that rotates one package in the winding device; a winding speed acquisition section that acquires the winding speed of the yarn wound to the package; and a control section that controls the winding number and the twill angle of the package by controlling the traversing device and the driving section based on the number of revolutions per unit time of the package and the winding speed.

[0006] In the spinning machine of one aspect of the present application, since the winding number is controlled, generation of laps and entanglements can be avoided. The angle of twist contributes to the take-off tension of the yarn when the yarn is unwound from the package in a subsequent process. The take-off tension in the package depends on the package diameter, the length of the unwinding, the angle of twist, and the like, and therefore, it is desirable to control the angle of twist in the spinning machine. The angle of twist is the ratio of the winding speed to the traversing speed, and if this ratio is made constant, the angle of twist is constant. Therefore, in the spinning machine, by acquiring the actual winding speed of the yarn and controlling the driving section and the traversing device based on the winding speed, the angle of twist can be made constant, that is, at least the variation in the take-off tension caused by the angle of twist can be alleviated. Thus, in the spinning machine, by controlling both the winding number and the angle of twist, generation of undesirable conditions (laps, entanglements, and the like) in the package can be avoided, and the take-off tension can be stabilized.

[0007] Furthermore, in the spinning machine of one aspect of the present application, a yarn reservoir device is provided between the spinning device and the winding device. Thus, even if a tension variation is generated in the yarn due to the control of the driving section and the traversing device in order to control the winding number and the angle of twist, this tension variation is absorbed by the yarn reservoir device. That is, the tension variation is not transmitted to the spinning device. As a result, spinning by the spinning device is not affected by the control of the winding number and the angle of twist, and therefore, in the spinning machine, the yarn can be stably generated by the spinning device. Thus, in the spinning machine, improvement in the quality of the package can be sought. In addition, the traversing device is provided for one package, and therefore, the traversing return (reversal) at a high speed can be performed at the end of the package, and generation of yarn drop can also be alleviated.

[0008] In one embodiment, the winding device can also have a winding drum that rotates in contact with the package, and the control section controls the driving section in a state in which the package is in contact with the winding drum. Thus, it is not necessary to separate the package from the winding drum in order to control the winding speed, and therefore, the yarn can be stably wound into the package.

[0009] In one embodiment, the control section can control the amount of the yarn stored in the yarn reservoir device by controlling at least the number of revolutions per unit time of the package while the package is being wound, and control the winding number and the angle of twist while controlling the amount of the yarn stored. Thus, generation of undesirable conditions in the package can be avoided, and the take-off tension of the package in a subsequent process can be stabilized.

[0010] In one embodiment, it can also be that the spinning device continuously spins the yarn at a constant speed at the time of winding of the package. In the case where the yarn is spun at a constant speed (the same speed), the spinning speed of the yarn cannot be changed in order to control the amount of accumulation of the yarn in the yarn accumulation device. Thus, in order to control the amount of accumulation of the yarn, the winding speed can easily be changed. Therefore, the structure of acquiring the winding speed to control the winding number and the twill angle of the package is particularly effective in the structure having the spinning device that continuously spins the yarn at a constant speed.

[0011] In one embodiment, it can also be that the control section controls the driving section and the traversing device so as to synchronize the period of acceleration and deceleration of the rotation speed of the driving section with the period of acceleration and deceleration of the traversing speed in the traversing device to control the twill angle. In this structure, by synchronizing the period of acceleration and deceleration of the rotation speed of the driving section with the period of acceleration and deceleration of the traversing speed, it is possible to make the ratio of the rotation speed of the package to the traversing speed constant, and thus, it is possible to make the twill angle constant. Thus, it is possible to make the unwinding tension of the package in the subsequent process constant, and thus, it is possible to seek improvement in the quality of the package.

[0012] In one embodiment, it can also be that the control section stepwise controls the rotation speed of the driving section. In this structure, it is possible to appropriately synchronize the period of acceleration and deceleration of the rotation speed with the period of acceleration and deceleration of the traversing speed.

[0013] In one embodiment, it can also be that the control section controls the driving section in such a manner that, in a constant period including the period during which the acceleration and deceleration of the rotation speed is performed in the driving section and the period during which the rotation speed is set to a constant speed, the period during which the acceleration and deceleration is performed is 25% or less of the constant period. In this structure, it is possible to extend the time (period) during which the rotation speed is constant with respect to the time (period) during which the rotation speed varies. Thereby, the time (period) during which the rotation speed is constant is synchronized with the time (period) during which the traversing speed is constant, and thus, it is possible to keep the ratio of the rotation speed of the package to the traversing speed constant.

[0014] In one embodiment, it can also be that the control section controls the rotation speed of the driving section based on a reference speed corresponding to the set spinning speed, and corrects the reference speed based on the difference between the winding speed and the reference speed. In this structure, it is possible to correct the deviation between the winding speed and the reference speed. Thus, it is possible to more accurately control the twill angle.

[0015] In one embodiment, the spinning machine can also include a storage state detection unit that detects the amount of yarn stored and / or the presence or absence of the yarn as the state of the yarn stored in the yarn storage device, and the winding speed acquisition unit can acquire the winding speed based on the state of the yarn detected by the storage state detection unit. In this configuration, the winding speed is acquired based on the state of the yarn (the amount of yarn stored and / or the presence or absence of the yarn) stored in the yarn storage device, and thus the winding speed can be acquired with a simple configuration. That is, there is no need to additionally provide a sensor for acquiring the winding speed, and thus the configuration of the entire spinning machine can be simplified.

[0016] In one embodiment, the spinning machine can also include a speed detection unit that detects the speed of the yarn traveling, and the winding speed acquisition unit can acquire the winding speed based on the speed of the yarn detected by the speed detection unit. In this configuration, the speed of the yarn actually wound around the package is detected, and thus an accurate winding speed can be acquired.

[0017] In one embodiment, the yarn storage device can include a yarn storage roller that stores the yarn by winding the yarn around the outer circumferential surface, and a yarn hooking member that winds the yarn around the outer circumferential surface of the yarn storage roller, and the control unit can control the driving unit such that the distance between the point at which the yarn is unwound from the outer circumferential surface of the yarn storage roller and the point at which the yarn is engaged in the yarn hooking member is 10 cm or less. In this configuration, the yarn is stably fed (unwound) from the yarn storage device. Thus, the generation of a pattern disorder in the package can be avoided, and thus the control of the twill angle can be stably performed.

[0018] In one embodiment, the spinning machine can include a rotation detection unit that detects the number of rotations of the package. In this configuration, the number of rotations of the package can be accurately detected, and thus the control based on the number of rotations of the package can be appropriately performed.

[0019] In one embodiment, the spinning machine can include a setting unit that sets the twill angle and the winding number including a value below the decimal point. In this configuration, the winding number and the twill angle can be arbitrarily set in the setting unit. In the conventional spinning machine, the setting of the winding number is not performed. Generally, in the spinning machine, attention is mainly paid to improving the quality of the yarn generated and improving the operation efficiency of the spinning machine itself. Thus, in the conventional spinning machine, the improvement of the quality of the package by improving the winding method of the yarn is not required in the market.

[0020] In one embodiment, the control unit can control the driving unit and the traversing device such that the package is formed in a stepwise precision winding. In this configuration, the generation of the laps and the drops can be avoided. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1is a front view of a spinning machine according to an embodiment.

[0022] Figure 2 is Figure 1 is a side view of a spinning unit of the spinning machine.

[0023] Figure 3 is a side view showing a yarn storage device.

[0024] Figure 4 is a view showing a traversing device.

[0025] Figure 5 is a view schematically showing a bobbin speed and a traverse speed.

[0026] Figure 6A , Figure 6B and Figure 6C is a view showing a relationship between a diameter of a package and a winding speed. DETAILED DESCRIPTION

[0027] Hereinafter, a preferred embodiment of the present application will be explained in detail with reference to the drawings. Further, in the explanation of the drawings, the same or equivalent elements are denoted by the same reference numerals, and overlapping explanation will be omitted.

[0028] As shown in Figure 1 , the spinning machine 1 is provided with a plurality of spinning units 2, a yarn joining carriage 3, a doffing carriage (omitted from the drawing), a first end stand 4, and a second end stand 5. The plurality of spinning units 2 are arranged in a row. Each spinning unit 2 generates a yarn Y and winds it into a package P. In a case where the yarn Y is cut or the yarn Y is broken for some reason in a certain spinning unit 2, the yarn joining carriage 3 performs a yarn joining operation in the spinning unit 2. In a case where the package P becomes full in a certain spinning unit 2, the doffing carriage performs doffing on the package P and supplies a new winding bobbin B to the spinning unit 2. In the first end stand 4, a recovery device or the like that recovers fiber dust and thread ends or the like generated in the spinning unit 2 is housed.

[0029] In the second end stand 5, an air supply portion that adjusts the air pressure of compressed air (air) supplied to each portion of the spinning machine 1 and supplies air to each portion, and a driving motor or the like that supplies power to each portion of the spinning unit 2 are housed. In the second end stand 5, a machine base control device 100 (setting portion), a touch panel screen 102, and an input key 104 are provided. The machine base control device 100 centrally manages and controls each portion of the spinning machine 1. The touch panel screen 102 can display information or the like related to the setting contents and / or the state of the spinning unit 2. By appropriately operating the buttons or the input key 104 or the like displayed in the touch panel screen 102, an operator can perform a setting operation of the spinning unit 2.

[0030] As shown in Figure 1 andFigure 2 As shown, each spinning unit 2 is provided with, in the traveling direction of the yarn Y, in order from the upstream side, a draft device 6, an air spinning device 7, a yarn monitoring device 8, a tension sensor 9, a yarn storage device 11, a waxing device 12, a traversing device 13, and a winding device 14. A unit controller 10 (winding speed acquisition section, control section) is provided for every prescribed number of spinning units 2, and controls the operation of the spinning units 2.

[0031] The draft device 6 drafts the fiber bundle (sliver) S. The draft device 6 has, in the traveling direction of the fiber bundle S, in order from the upstream side, a back roller pair 15, a third roller pair 16, an intermediate roller pair 17, and a front roller pair 18.

[0032] The back roller pair 15 includes a back lower roller 15a on the drive side and a back upper roller 15b on the driven side. The back lower roller 15a and the back upper roller 15b face each other across a traveling path through which the fiber bundle S travels. The third roller pair 16 includes a third lower roller 16a on the drive side and a third upper roller 16b on the driven side. The third lower roller 16a and the third upper roller 16b face each other across the traveling path through which the fiber bundle S travels. The intermediate roller pair 17 includes an intermediate lower roller 17a on the drive side and an intermediate upper roller 17b on the driven side. The intermediate lower roller 17a and the intermediate upper roller 17b face each other across the traveling path through which the fiber bundle S travels. The front roller pair 18 includes a front lower roller 18a on the drive side and a front upper roller 18b on the driven side. The front lower roller 18a and the front upper roller 18b face each other across the traveling path through which the fiber bundle S travels.

[0033] The back lower roller 15a, the third lower roller 16a, the intermediate lower roller 17a, and the front lower roller 18a are rotated at mutually different rotational speeds by drive motors provided to the spinning unit 2 in such a manner that the further downstream the roller, the faster the rotational speed. A godet 19a is provided to the intermediate lower roller 17a. A godet 19b is provided to the intermediate upper roller 17b. The front lower roller 18a can also be driven by a drive motor provided within the second end frame 5 in common to a plurality of spinning units 2.

[0034] The back upper roller 15b, the third upper roller 16b, the intermediate upper roller 17b, and the front upper roller 18b are rotatably supported to a draft cradle (not shown). The back upper roller 15b, the third upper roller 16b, the intermediate upper roller 17b, and the front upper roller 18b each contact and are driven to rotate by the back lower roller 15a, the third lower roller 16a, the intermediate lower roller 17a, and the front lower roller 18a, respectively, at a prescribed pressure.

[0035] The air spinning apparatus 7 uses a rotating airflow to twist the fiber bundle S, which has been drafted by the drafting device 6, thereby generating yarn Y. The air spinning apparatus 7 continuously spins the yarn Y at a constant speed. Although detailed descriptions and illustrations are omitted, the air spinning apparatus 7 includes a fiber guiding section, a swirling airflow generating nozzle, and a hollow guide shaft. The fiber guiding section guides the fiber bundle S from the drafting device 6 into a spinning chamber formed inside the air spinning apparatus 7. The swirling airflow generating nozzle is positioned around the path of the fiber bundle S, generating a swirling airflow within the spinning chamber. Due to this swirling airflow, the fiber ends of the fiber bundle S within the spinning chamber flip and swirl. The hollow guide shaft guides the spun yarn Y from the spinning chamber to the outside of the air spinning apparatus 7.

[0036] The yarn monitoring device 8 monitors the information of the traveling yarn Y between the air spinning device 7 and the yarn holding device 11, and detects the presence of yarn defects based on the monitored information. If a yarn defect is detected, the yarn monitoring device 8 sends a yarn defect detection signal to the unit controller 10. For example, the yarn monitoring device 8 detects abnormalities in the thickness of the yarn Y and / or foreign matter contained in the yarn Y as yarn defects. The yarn monitoring device 8 also detects yarn breaks, etc.

[0037] Tension sensor 9 measures the tension of the traveling yarn Y between the air spinning device 7 and the yarn storage device 11, and sends the tension measurement signal to the unit controller 10. If the unit controller 10 determines an abnormality based on the detection results of the yarn monitoring device 8 and / or tension sensor 9, it cuts the yarn Y in the spinning unit 2. Specifically, it stops supplying air to the air spinning device 7 and interrupts the generation of yarn Y, thereby cutting the yarn Y. Alternatively, the yarn Y can be cut using a separately provided cutter.

[0038] The yarn retention device 11 retains yarn Y between the air spinning device 7 and the winding device 14. The yarn retention device 11 has the following functions: to apply a predetermined tension to the yarn Y and draw it out from the air spinning device 7; to retain the yarn Y delivered from the air spinning device 7 during yarn splicing by the splicing device 26 to prevent the yarn Y from slackening; and to adjust the tension so that tension changes on the winding device 14 side are not transmitted to the air spinning device 7 side.

[0039] like Figure 3 As shown, the yarn retention device 11 includes a yarn retention roller 30, a yarn hook component 31, an upstream guide 32, a downstream guide 33, a yarn retention amount sensor (retention status detection unit) 34, and an electric motor 35.

[0040] The yarn storage roller 30 winds and stores the yarn Y on the outer peripheral surface thereof. The yarn storage roller 30 is rotationally driven by an electric motor 35. The operation of the electric motor 35 is controlled by the unit controller 10. By the rotation of the yarn storage roller 30, the yarn Y wound on the outer peripheral surface of the yarn storage roller 30 is tightly wound at the yarn storage roller 30, and pulls the yarn Y on the upstream side of the yarn storage device 11. That is, by rotating the yarn storage roller 30 in the state where the yarn Y is wound on the outer peripheral surface thereof at a predetermined rotational speed, the yarn storage device 11 gives a predetermined tension to the yarn Y, and draws the yarn Y from the air spinning device 7 at a predetermined speed, and feeds the yarn Y to the downstream side at a predetermined speed.

[0041] The yarn hooking member 31 is configured so as to be engageable (hookable) with the yarn Y. The yarn hooking member 31 winds the yarn Y on the outer peripheral surface of the yarn storage roller 30 by rotating integrally with the yarn storage roller 30 in the state of engagement with the yarn Y. The yarn hooking member 31 is provided at the downstream end of the yarn storage roller 30, and is relatively rotatable with respect to the yarn storage roller 30. The yarn hooking member 31 is acted on by a magnetic force that counteracts the relative rotation with respect to the yarn storage roller 30. Thus, in the state where a tension of not more than a predetermined tension is not generated in the yarn Y, the yarn hooking member 31 rotates integrally with the yarn storage roller 30, and the yarn Y is wound (stored) on the yarn storage roller 30. In the state where a tension greater than the predetermined tension is generated in the yarn Y, the yarn hooking member 31 relatively rotates with respect to the yarn storage roller 30, and the yarn Y is unwound from the yarn storage roller 30.

[0042] The upstream guide 32 is disposed on the upstream side of the yarn storage roller 30. The upstream guide 32 is a guide member that properly guides the yarn Y with respect to the outer peripheral surface of the yarn storage roller 30, and also has a twist stopping function of preventing the twist of the yarn Y transmitted from the air spinning device 7 from being transmitted to a position on the downstream side of the upstream guide 32.

[0043] The downstream guide 33 is disposed on the downstream side of the yarn storage roller 30. The downstream guide 33 guides (limits) the yarn path of the yarn Y unwound from the yarn storage roller 30. The yarn path of the yarn Y from the yarn storage roller 30 to the winding device 14 is stabilized by the downstream guide 33.

[0044] The yarn accumulation amount sensor 34 detects the accumulation amount (state) of the yarn Y accumulated on the yarn accumulation roller 30 in a non-contact manner. In the present embodiment, the yarn accumulation amount sensor 34 detects the accumulation amount of the yarn Y in a part of the region of the yarn accumulation roller 30. The yarn accumulation amount sensor 34 outputs a 2-value (signal) of ON / OFF. The yarn accumulation amount sensor 34 outputs an ON signal when the yarn Y is detected on the yarn accumulation roller 30, and outputs an OFF signal when the yarn Y is not detected. The yarn accumulation amount sensor 34 transmits the detection result to the unit controller 10 (refer to Figure 1 ).

[0045] In the yarn accumulation device 11, the yarn Y is accumulated in a manner that the distance D between the point of withdrawal of the yarn Y from the yarn accumulation roller 30 (the point at which the yarn Y departs from the outer surface of the yarn accumulation roller 30) and the point of engagement of the yarn Y in the yarn hooking member 31 (the point of contact of the yarn Y) is 10 cm or less. The distance D is set in accordance with the accumulation amount of the yarn Y. The unit controller 10 controls the driving motor 23, which will be discussed later, so that the distance D becomes 10 cm or less.

[0046] As shown in Figs. 1 and 2, the waxing device 12 waxes the yarn Y between the yarn accumulation device 11 and the winding device 14. Figure 1 Figure 2 As shown in Figs. 1 and 2, the waxing device 12 waxes the yarn Y between the yarn accumulation device 11 and the winding device 14.

[0047] As shown in Figs. 1 and 2, the waxing device 12 waxes the yarn Y between the yarn accumulation device 11 and the winding device 14. Figure 4 The traversing device 13 traverses the yarn Y with respect to the rotating winding bobbin B or package P by a prescribed width. The traversing device 13 traverses the yarn Y wound to one package P. In other words, one traversing device 13 is provided in one spinning unit 2. The traversing device 13 is provided with a traversing motor 13a, a driving pulley 13b, driven pulleys 13c, 13d, a driving belt 13e, and a traversing guide 13f.

[0048] The traversing motor 13a is, for example, a stepping motor or a servo motor. The traversing motor 13a rotationally drives the driving pulley 13b. The operation of the traversing motor 13a is controlled by the unit controller 10. The driving pulley 13b is rotationally driven in forward and reverse by the traversing motor 13a. The driven pulleys 13c, 13d are provided on both sides of the traversing range. The driving belt 13e is stretched between the driving pulley 13b and the driven pulleys 13c, 13d. The traversing guide 13f, which can guide the yarn Y, is fixed to the driving belt 13e. The traversing guide 13f traverses the yarn Y in accordance with the movement of the driving belt 13e.

[0049] A position detection sensor that detects the position of at least either the traversing motor 13a or the traversing guide 13f can also be provided. Thereby, accurate position control of the traversing guide 13f can be performed. ​

[0050] In the traverse device 13, the drive pulley 13b is rotated in forward and reverse directions by driving of the traverse motor 13a, whereby the traverse guide 13f fixed to the drive belt 13e is driven to reciprocate in the axial direction of the winding drum 22. The traverse guide 13f thereby traverses the yarn Y with respect to the rotating winding tube B or package P by a prescribed width. In the traverse device 13, the traverse speed (the moving speed of the traverse guide 13f) is varied by varying the rotational speed of the traverse motor 13a.

[0051] As shown in Figure 1 and Figure 2 , the winding device 14 winds the yarn Y on the winding tube B to form the package P. The winding device 14 has a cradle arm 21 and a winding drum 22. The cradle arm 21 rotatably supports the winding tube B. The cradle arm 21 is swingably supported by a support shaft 24, and brings the surface of the winding tube B or the surface of the package P into contact with the surface of the winding drum 22 with an appropriate pressure. For this purpose, a cylinder or the like is provided in the cradle arm 21.

[0052] The winding drum 22 is rotationally driven by a drive motor (drive section) 23 (see Figure 4 ). The drive motor 23 is, for example, a brushless motor. The drive motor 23 drives one winding drum 22. That is, the drive motor 23 rotates one package P. Further in other words, one winding drum 22 and one drive motor 23 are provided in one spinning unit 2. The winding tube B or the package P is thereby independently rotated in the winding direction in each spinning unit 2. The operation of the drive motor 23 is controlled by the unit controller 10. In each spinning unit 2, the drive motor 23 is provided separately, and thus the rotational drive of the winding drum 22 can be controlled in accordance with the spinning unit 2.

[0053] As shown in Figure 4 , the spinning unit 2 is provided with a rotation sensor (rotation detecting section) 25 that detects the number of revolutions per unit time of the drive motor 23 (hereinafter simply referred to as "number of revolutions"), that is, the number of revolutions per unit time of the winding drum 22 (package P) (hereinafter simply referred to as "number of revolutions"). The rotation sensor 25 transmits the detection result to the unit controller 10 (see Figure 1 ).

[0054] As shown in Figure 1 and Figure 2In the case where the yarn Y is cut or the yarn Y is broken for some reason in a certain spinning unit 2, the yarn receiving carriage 3 travels to the spinning unit 2 and performs a yarn receiving operation. The yarn receiving carriage 3 has a yarn receiving device 26, a suction pipe 27, and a suction nozzle 28. The suction pipe 27 is rotatably supported by a support shaft 27a, captures the yarn Y from the air spinning device 7, and guides it to the yarn receiving device 26. The suction nozzle 28 is rotatably supported by a support shaft 27b, captures the yarn Y from the winding device 14, and guides it to the yarn receiving device 26. The yarn receiving device 26 receives the guided yarn Ys to each other. The yarn receiving device 26 is a twister using compressed air or a knotter mechanically connecting the yarn Ys.

[0055] Next, the control performed by the unit controller 10 will be described in detail.

[0056] The unit controller 10 controls the driving motor 23 and the traversing device 13 based on the number of revolutions of the package P and the winding speed of the yarn Y, thereby controlling the winding number of the package P and the twill angle. The winding number is the number of times the package P rotates during the period of one reciprocation of the yarn Y in the width direction of the package P (axial direction of the winding bobbin B). The twill angle is the angle of the yarn Y wound into the package P with respect to a direction orthogonal to the axial direction of the winding bobbin B. The twill angle is determined by the rotation speed (winding speed) of the package P and the traversing speed of the traversing guide 13f of the traversing device 13. The twill angle is the ratio of the rotation speed to the traversing speed. In order to make the twill angle constant, the ratio of the rotation speed to the traversing speed is made constant.

[0057] The winding number and the twill angle are set in the machine control device 100. The operator sets the winding number and the twill angle in a prescribed setting screen of the touch panel screen 102.

[0058] As the winding number, a numerical value including at least a value after the decimal point can be set. The winding number can be input by the operator, can be selected from a plurality of values (safe winding numbers) set in advance in the machine control device 100, or can be selected from a plurality of items (for example, setting 1, setting 2, and the like).

[0059] The twill angle can be input by the operator, can be selected from a plurality of values set in advance in the machine control device 100, or can be selected from a plurality of items. The twill angle can also be a value including a prescribed range (for example, a° or more and β° or less, and the like).

[0060] The unit controller 10 controls the driving motor 23 and the traversing device 13 in such a manner that the winding number and the twill angle set in the machine control device 100 are obtained.

[0061] The unit controller 10 obtains the number of revolutions of the winding drum 22, i.e., the number of revolutions of the package P, based on the detection results of the rotation sensor 25. Furthermore, the unit controller 10 calculates the drum speed, which is the rotational speed of the winding drum 22, based on the detection results of the rotation sensor 25. The drum speed can also be referred to as the rotational speed of the package P.

[0062] Based on the detection results of the yarn retention sensor 34, the unit controller 10 obtains the actual average winding speed (hereinafter referred to as "winding speed") of the yarn Y wound onto the package P. The method for obtaining the winding speed by the unit controller 10 is described below.

[0063] The unit controller 10 controls the drive motor 23 based on the detection results from the yarn retention sensor 34, thereby controlling (changing) the drum speed. (See reference...) Figure 5 This control is described. Figure 5 In the "cylinder speed" parameter, the solid line represents the actual cylinder speed, and the dashed line represents the reference speed.

[0064] If spinning begins in spinning unit 2, unit controller 10 controls drive motor 23 to rotate winding drum 22 so that the drum speed becomes a reference speed obtained based on the spinning speed set according to the batch, number of windings, and twill angle of package P. Unit controller 10 accelerates or decelerates the drum speed in a stepwise manner based on the detection results of yarn retention sensor 34.

[0065] like Figure 5 As shown, in this embodiment, the unit controller 10 performs two-speed control on the drum speed. Specifically, the unit controller 10 linearly decelerates or accelerates the drum speed between a first speed (constant speed) and a second speed (constant speed). The unit controller 10 accelerates or decelerates the drum speed in a manner that does not produce slippage between the winding drum 22 and the package P. During a constant period that includes the period (time) during which the drum speed is set to a constant speed and the period (time) during which the drum speed is accelerated or decelerated, the unit controller 10 sets the period (time) during which the drum speed is accelerated or decelerated to 25% or less, preferably 10% or less, of the constant period. In other words, the unit controller 10 sets the period (time) during which the drum speed is set to a constant speed to more than 75% of the aforementioned constant period.

[0066] If yarn Y is fed out from the yarn storing roller 30 of the yarn storing device 11 and the yarn storing amount sensor 34 outputs an OFF signal, then the unit controller 10 controls the drive motor 23 to reduce the drum speed from the first speed to the second speed. Figure 5(The portion enclosed by the dotted line in the image). If the drum speed is set to the second speed and the winding drum 22 rotates, the yarn Y stored in the yarn storage roller 30 increases. If the yarn Y stored in the yarn storage roller 30 increases and the yarn storage sensor 34 outputs an ON signal, the unit controller 10 controls the drive motor 23 to accelerate the drum speed from the second speed to the first speed (…). Figure 5 (The part enclosed by the dotted line in the diagram). If the drum speed is set to the first speed and the winding drum 22 is rotated, the amount of yarn Y retained by the yarn retention roller 30 will decrease.

[0067] The unit controller 10 controls the drive motor 23 such that the first speed is 0.5% to 10% of the current reference speed, and the second speed is -10% to -0.5% of the current reference speed. The unit controller 10 repeatedly accelerates and decelerates the bobbin speed based on the detection results of the yarn accumulation sensor 34. In this embodiment, the acceleration and deceleration of the package P are achieved by controlling the rotation of the drive motor 23 while maintaining contact between the package P and the winding bobbin 22.

[0068] The unit controller 10 calculates the winding speed based on the detection results (ON / OFF) of the yarn retention sensor 34. The unit controller 10 calculates the cycle times t1 and t2 based on the continuous ON period of the ON signal and the continuous OFF period of the OFF signal.

[0069] exist Figure 5 In this diagram, cycle time t1 is the duration of the ON signal, and cycle time t2 is the duration of the OFF signal. The unit controller 10 calculates the winding speed based on cycle times t1 and t2. In actual control, the winding speed is calculated based on multiple cycle times. Figure 5 The diagram illustrates a configuration where cycle times t1 and t2 have the same length. However, the winding device 14 can also be controlled such that the winding of the roll P after the joint operation continues as long as possible, and the length of each cycle time is longer.

[0070] The unit controller 10 corrects the reference speed based on the calculated winding speed. The unit controller 10 corrects (changes, adjusts) the reference speed to make the reference speed the same as the winding speed. That is, when the winding speed deviates from the reference speed, the unit controller 10 corrects the reference speed in a way that makes the reference speed consistent with the winding speed.

[0071] exist Figure 5 In the example shown, unit controller 10 performs a correction to decelerate the reference speed. Unit controller 10 can change the reference speed either instantly, linearly, curvilinearly, or stepwise. Figure 5In the example of FIG. 6, even if the reference speed changes, the speed difference between the reference speed and the first speed is the same, and the speed difference between the reference speed and the second speed is the same. However, it is also possible to control the drive motor 23 in such a manner that the speed difference decreases in accordance with the progress of the winding of the package P.

[0072] In a case where the yarn Y starts to be wound into the package P (the bobbin B), that is, in a case where the diameter of the package P is relatively small, the variation in the winding speed is large. Therefore, the unit controller 10 performs the correction of the reference speed at a short cycle. If the diameter of the package P is relatively large, the unit controller 10 performs the correction of the reference speed at a long cycle. The unit controller 10 controls the drive motor 23 (controls the bobbin speed) on the basis of the corrected reference speed after the correction of the reference speed is performed.

[0073] The unit controller 10 controls the winding number of the package P on the basis of the number of revolutions of the package P and the traverse speed. The unit controller 10 controls the drive motor 23 and the traverse motor 13a on the basis of the number of revolutions of the winding bobbin 22 and the reference speed to form the package P by step-precision winding.

[0074] The step-precision winding is a winding form in which the ratio of the number of revolutions of the package P to the number of traverses per unit time by the traverse device 13, that is, the winding ratio, is switched in a stepwise manner. In the step-precision winding, the yarn Y is wound into the package P while the twill angle is maintained within a constant range close to a prescribed angle (target twill angle) by switching the winding number in a stepwise manner. In the step-precision winding, in a case where the current winding number approaches a dangerous winding number at which a lap is generated, the following series of controls is repeatedly performed. That is, the series of controls is control in which, after the winding number is changed in such a manner that the twill angle is abruptly changed (traverse is abruptly changed) so that the winding number does not become the dangerous winding number from a state in which the winding number is constant, the state in which the winding number is constant is restored. According to the step-precision winding, a lap region is not generated at all, and it is possible to wind the yarn Y while the twill pattern of the package P is neat (the adjacent twill patterns are set at equal intervals).

[0075] The unit controller 10 controls the twill angle of the package P by controlling the drive motor 23 and the traverse device 13 on the basis of the bobbin speed. The unit controller 10 synchronizes the cycle of the acceleration and deceleration of the bobbin speed with the cycle of the acceleration and deceleration of the traverse speed. In the present embodiment, the unit controller 10 synchronizes the cycle of the acceleration and deceleration of the traverse speed with the cycle of the acceleration and deceleration of the bobbin speed. More specifically, the unit controller 10 synchronizes the cycle of the acceleration of the traverse speed with the cycle of the acceleration of the bobbin speed, and synchronizes the cycle of the deceleration of the traverse speed with the cycle of the deceleration of the bobbin speed. Thereby, the ratio of the bobbin speed to the traverse speed is constant, and the twill angle is constant.

[0076] The unit controller 10 can also control the traversing device 13 so that the diagonal angle increases near the traverse turn of the package P (both ends of the package P). Specifically, the unit controller 10 divides the movement region of the traversing guide 13f in the traverse direction into a central portion and an end portion other than the central portion. The unit controller 10 makes the traverse speed at the end portion faster than the traverse speed at the central portion while keeping the drum speed constant. Thus, it is possible to increase the diagonal angle near the traverse turn of the package P. In Figure 5 The change in the traverse speed accompanying this control is omitted.

[0077] In addition, the unit controller 10 can also change the movement region (predetermined width) of the traversing guide 13f in the traverse direction in inverse proportion to the free length (distance between the peripheral surface of the package P and the traversing guide 13f) that varies according to the change in the diameter of the package P.

[0078] The unit controller 10 starts the control of the winding number and the diagonal angle based on the reference speed immediately before the break of the yarn Y occurs after the break of the yarn Y has occurred in the spinning unit 2 and the joint operation has been performed. The amount of the yarn Y stored in the yarn storage roller 30 increases immediately after the joint operation has been performed. In this case, the unit controller 10 accelerates the drum speed in order to reduce the amount of the yarn Y stored in the yarn storage roller 30. In this case, the unit controller 10 also synchronizes the period of acceleration and deceleration of the drum speed with the period of acceleration and deceleration of the traverse speed. Thus, it is possible to perform the control of the winding number and the diagonal angle even when the winding of the package P is restarted.

[0079] The machine control device 100 can also monitor the reference speeds of the respective spinning units 2. The machine control device 100 can also notify when there is a spinning unit 2 whose reference speed is different (has a difference of more than a threshold value) from the reference speeds of other spinning units 2 among the plurality of spinning units 2. The machine control device 100 can also notify when there is a spinning unit 2 whose reference speed exceeds the predetermined speed. The notification can be made by display to the touch panel screen 102, display to the display portion of each spinning unit 2, and / or buzzing of a buzzer or the like.

[0080] As explained above, in the spinning machine 1 of the present embodiment, the winding number is controlled, and thus, the generation of laps and entanglements can be avoided. The twill angle contributes to the unwinding tension at the time of unwinding the yarn Y from the package P in the subsequent process. If the twill angle is made constant in the package P, the unwinding tension is also constant. The twill angle is the ratio of the rotational speed of the package P to the traversing speed, and if the ratio is made constant, the twill angle is constant. Therefore, in the spinning machine 1, the actual winding speed of the yarn Y is acquired, and the driving motor 23 and the traversing device 13 (specifically, the traversing motor 13a) are controlled based on the winding speed, and thus, the ratio of the rotational speed (can speed) of the package P to the traversing speed can be made constant. Thereby, the twill angle can be made constant. That is, the unwinding tension can be made constant. In this way, in the spinning machine 1, by controlling both the winding number and the twill angle, the generation of the defects (laps, entanglements, and the like) in the package P can be avoided, and the unwinding tension can be stabilized.

[0081] Furthermore, in the spinning machine 1, the yarn storage device 11 is provided between the air spinning device 7 and the winding device 14. Thus, even if the tension variation is generated in the yarn Y due to the control of the driving motor 23 and the traversing device 13 for controlling the winding number and the twill angle, the tension variation is absorbed by the yarn storage device 11. That is, the tension variation is not transmitted to the air spinning device 7. As a result, the spinning by the air spinning device 7 is not affected by the control of the winding number and the twill angle, and thus, in the spinning machine 1, the yarn Y can be stably generated by the air spinning device 7. Thus, in the spinning machine 1, the improvement of the quality of the package P can be sought. In addition, since one traversing device 13 is provided for one package P, the traversing return (reversal) at the end portion of the package P can be performed at high speed, and the generation of the yarn drop can also be reduced.

[0082] In the spinning machine 1 of the present embodiment, the winding device 14 has the winding drum 22 that rotates in a state of contacting the package P. The unit controller 10 controls the driving motor 23 in a state where the package P contacts the winding drum 22. Thereby, it is not necessary to separate the package P from the winding drum 22 for controlling the winding speed, and thus, the yarn Y can be stably wound into the package P.

[0083] In the spinning machine 1 of the present embodiment, the unit controller 10 controls the take-up of the yarn Y accumulated in the yarn accumulation device 11 by controlling at least the number of revolutions per unit time of the package P at the time of winding of the package P, and controls the winding number and the twill angle while controlling the take-up. Thus, it is possible to avoid the occurrence of a defective package P and to stabilize the unwinding tension of the package P in a subsequent process. If the take-up of the yarn Y becomes excessive and the yarn Y overflows from the yarn accumulation device 11, it is not possible to continue the winding of the package P or the quality of the yarn Y drawn from the air spinning device 7 deteriorates. Even if the take-up of the yarn Y becomes insufficient, the quality of the yarn Y drawn from the air spinning device 7 becomes unstable.

[0084] In the spinning machine 1 of the present embodiment, the air spinning device 7 continuously spins the yarn Y at a constant speed (the same speed) at the time of winding of the package P. That is, the structure of the spinning machine 1 is greatly different from that of a machine such as an automatic winder which passively supplies the yarn Y. In the case where the yarn Y is spun at a constant speed, it is not possible to stop the spinning of the yarn Y or to change the spinning speed in order to control the take-up of the yarn Y in the yarn accumulation device 11. Thus, in order to control the take-up of the yarn Y, the winding speed can easily be changed. Therefore, a structure which acquires the winding speed and controls the winding number and the twill angle of the package P is particularly effective in a structure which is provided with an air spinning device 7 which continuously spins the yarn Y at a constant speed.

[0085] In the spinning machine 1 of the present embodiment, the unit controller 10 controls the driving motor 23 and the traversing device 13 so as to synchronize the period of acceleration and deceleration of the rotational speed of the driving motor 23 with the period of acceleration and deceleration of the traversing speed in the traversing device 13 and control the twill angle. In this structure, by synchronizing the period of acceleration and deceleration of the rotational speed with the period of acceleration and deceleration of the traversing speed, it is possible to make the ratio of the rotational speed to the traversing speed of the package P constant, and thus it is possible to make the twill angle constant. Thus, it is possible to make the unwinding tension of the package P in a subsequent process constant, and thus it is possible to seek an improvement in the quality of the package P.

[0086] In the spinning machine 1 of the present embodiment, the unit controller 10 stepwise controls the rotational speed of the driving motor 23. In this structure, it is possible to appropriately synchronize the period of acceleration and deceleration of the rotational speed with the period of acceleration and deceleration of the traversing speed.

[0087] In the spinning machine 1 of the present embodiment, the unit controller 10 controls the driving motor 23 in such a manner that, in a constant period including a period (time) during which the rotational speed is accelerated or decelerated in the driving motor 23 and a period (time) during which the rotational speed is set to a constant speed, the period (time) during which the acceleration or deceleration is performed is 25% or less of the constant period. In this configuration, the time during which the rotational speed is constant is lengthened with respect to the time during which the rotational speed is varied. Thus, the time during which the rotational speed is constant is synchronized with the time during which the traverse speed is constant, and therefore, the ratio of the rotational speed to the traverse speed can be easily kept constant.

[0088] In the spinning machine 1 of the present embodiment, the unit controller 10 controls the rotational speed of the driving motor 23 based on a reference speed, and corrects the reference speed based on the difference between the winding speed and the reference speed. In this configuration, the deviation between the winding speed and the reference speed can be corrected. Thus, the twill angle can be controlled more accurately.

[0089] The spinning machine 1 of the present embodiment is provided with a yarn accumulation amount sensor 34 that detects the state of the yarn accumulated in the yarn accumulation device 11. The unit controller 10 acquires the winding speed based on the state of the yarn Y detected by the yarn accumulation amount sensor 34. In this configuration, since the winding speed is acquired based on the state (accumulation amount, presence or absence of the yarn) of the yarn Y accumulated in the yarn accumulation device 11, the winding speed can be acquired with a simple configuration.

[0090] In the spinning machine 1 of the present embodiment, the yarn accumulation device 11 has a yarn accumulation roller 30 that accumulates the yarn Y and a yarn hooking member 31 that winds the yarn Y around the outer peripheral surface of the yarn accumulation roller 30. The unit controller 10 controls the driving motor 23 in such a manner that the distance between the point at which the yarn Y is unwound in the yarn accumulation roller 30 and the point at which the yarn Y is engaged in the yarn hooking member 31 is 10 cm or less. In this configuration, the delivery (unwinding) of the yarn Y from the yarn accumulation device 11 is stable. Thus, it is possible to avoid the occurrence of a pattern disorder in the package P, and therefore, the control of the twill angle can be stably performed.

[0091] The spinning machine 1 of the present embodiment is provided with a rotation sensor 25 that detects the number of revolutions per unit time of the driving motor 23, i.e., the number of revolutions per unit time of the winding drum 22 (the package P). In this configuration, the number of revolutions of the package P can be detected with high accuracy, and therefore, the control based on the number of revolutions of the package P can be appropriately performed.

[0092] The spinning machine 1 of the present embodiment is provided with a machine control device 100 that sets the twill angle and the winding number including at least a value after the decimal point. In this configuration, in the machine control device 100, the winding number and the twill angle can be arbitrarily set.

[0093] In the spinning machine 1 of the present embodiment, the unit controller 10 controls the driving motor 23 and the traversing device 13 in such a manner that the package P is formed in a stepwise precision winding. In this configuration, it is possible to avoid the generation of laps and entanglements.

[0094] In the spinning machine 1 of the present embodiment, the unit controller 10 corrects the reference speed based on the winding speed. Therefore, it is possible to automatically correct the take-up ratio (the ratio of the peripheral speed of the package P to the peripheral speed of the yarn reservoir roller 30), and therefore, the operator does not need to set the take-up ratio. Therefore, it is possible to seek the simplification of the operation.

[0095] The above describes the embodiments of the present application, but the present application is not necessarily limited to the above-described embodiments, and various changes can be made within the scope of the gist thereof.

[0096] In the above-described embodiments, each device is configured in such a manner that the yarn Y supplied on the upper side is wound on the lower side in the machine bed height direction. However, each device can also be configured in such a manner that the yarn supplied on the lower side is wound on the upper side. Instead of the configuration in which the yarn Y is drawn from the air spinning device 7 by the yarn reservoir roller 30, a pair of drawing rollers can be provided at a position upstream of the yarn reservoir roller 30, and the yarn can be drawn from the air spinning device 7 by the pair of drawing rollers.

[0097] In the above-described embodiments, the configuration in which the drafting device 6 is provided with the back roller pair 15, the third roller pair 16, the intermediate roller pair 17, and the front roller pair 18 is described as an example. However, one or more roller pairs can be provided at a position upstream of the back roller pair 15. In addition, the front roller pair (the roller pair disposed at the position closest to the air spinning device 7 in the conveyance path of the fiber bundle S) can also be configured as a part of another device. For example, the spinning unit 2 can be provided with a supply device that supplies the fiber bundle S after drafting by the drafting device 6 to the air spinning device 7, and the front roller pair 18 can be included as a part of the supply device. The front roller pair 18 can be included in the drafting device 6 that drafts the fiber bundle S or the supply device that supplies the fiber bundle S to the air spinning device 7, or can be provided separately from the other devices.

[0098] In the above-described embodiments, the configuration in which the lower roller of the drafting device 6 is driven by the power from the second end frame 5 (i.e., the plurality of spinning units 2 are commonly driven) is described as an example. However, the drafting device can also be driven independently for each spinning unit 2.

[0099] In the above-described embodiments, the configuration in which the air spinning device 7 continuously spins the yarn Y at a constant speed is described as an example. However, the speed at which the air spinning device 7 continuously spins the yarn Y can not be constant.

[0100] In the above embodiment, the case where the two yarn ends are connected by the joining device 26 is described as an example. However, instead of the structure where the yarn ends are connected by the joining device 26, the yarn Y from the package P can be inserted into the air spinning device 7 and the drafting action of the drafting device 6 and the spinning action of the air spinning device 7 can be started, thereby connecting (piecing) the yarn Y from the air spinning device 7 and the yarn Y of the package P. In either case, the piecing trolley can be omitted and each spinning unit 2 is provided with the device necessary for piecing.

[0101] In the above embodiment, the case where the tension sensor 9 is disposed on the downstream side of the yarn monitoring device 8 in the traveling direction of the yarn Y is described as an example. However, the tension sensor 9 can also be disposed on the upstream side of the yarn monitoring device 8.

[0102] The unit controller 10 can also be provided for each spinning unit 2.

[0103] In the spinning unit 2, the waxing device 12, the tension sensor 9, and the yarn monitoring device 8 can also be omitted. In the case where the yarn Y is not waxed, the waxing device 12 can also not be omitted but only the wax can be taken off from the waxing device 12.

[0104] In the above embodiment, the case where the magnetic force acts on the yarn hooking member 31 of the yarn storage device 11 in opposition to the relative rotation with respect to the yarn storage roller 30 is described as an example. However, the yarn hooking member 31 can also be a structure that is independently driven from the yarn storage roller 30 by a driving portion (motor). In addition, the yarn storage device 11 can be provided with a magnetic field forming member composed of an electromagnet, and the magnetic field formed by the magnetic field forming member can act on the yarn hooking member 31 to generate a rotational torque between the yarn storage roller 30 and the yarn hooking member 31.

[0105] In the above embodiment, the case where the yarn storage amount sensor 34 of the yarn storage device 11 detects the storage amount of the yarn Y in a part of the region of the yarn storage roller 30 is described as an example. However, the yarn storage amount sensor 34 can also be a linear sensor. In this structure, the yarn Y stored in the yarn storage roller 30 can be detected over a wide range. Therefore, the unit controller 10 can more finely perform the control of the acceleration and deceleration of the bobbin speed.

[0106] In the above embodiment, the case where the unit controller 10 is configured to control the air spinning device 7 and the drafting device 6 of the spinning unit 2 as one example is described. However, the unit controller 10 can also be configured to control the air spinning device 7 and the drafting device 6 of the spinning unit 2 and the joining device 26 of the joining device 2. Figure 5The case where the bobbin speed is controlled in two steps is described as an example. However, the unit controller 10 can control the bobbin speed in three steps, for example, in three steps of the first speed, the second speed, and the third speed. In the case where the unit controller 10 controls the bobbin speed in three steps of the first speed, the second speed, and the third speed, the unit controller 10 linearly accelerates or decelerates the bobbin speed during the transition between the first speed and the second speed, and linearly accelerates or decelerates the bobbin speed during the transition between the second speed and the third speed.

[0107] In the above embodiment, the case where the unit controller 10 calculates the winding speed based on the ON period during which the ON signal is continued and the OFF period during which the OFF signal is continued in the yarn accumulation amount sensor 34, and calculates the winding speed based on the cycle time tl and the cycle time t2 is described as an example. However, the unit controller 10 can calculate the winding speed based on the duty ratio of the sensor gain of the yarn accumulation amount sensor 34.

[0108] In the above embodiment, the case where the unit controller 10 calculates the winding speed based on the detection result of the yarn accumulation amount sensor 34 is described as an example. However, the winding speed can be detected by a yarn speed detection device (speed detection unit) that detects the speed of the traveling yarn Y. The yarn speed detection device can be provided independently or can be built in the yarn monitoring device 8. In either case, the yarn speed detection device is provided, for example, between the yarn accumulation device 11 and the winding device 14.

[0109] The winding speed can be calculated based on the detection result of the tension sensor 9. Specifically, the winding speed is calculated from the relationship (S-S curve) between the tension of the yarn Y measured by the tension sensor 9 and the elongation of the yarn Y. These structures enable more accurate acquisition of the winding speed in the yarn speed detection device. Thus, the reference speed can be more appropriately corrected, and therefore, the control of the winding number and the twill angle can be more appropriately performed.

[0110] In the above embodiment, the case where the number of revolutions of the package P is detected by the rotation sensor 25 is described as an example. However, the number of revolutions of the package P can be calculated based on the detection result of a sensor that detects the inclination of the creel arm 21 and a sensor that detects the number of revolutions of the winding bobbin 22 provided in the spinning unit 2. Alternatively, the number of revolutions of the winding bobbin 22 can be calculated based on the elapsed time (length of time) from the start of winding of the yarn Y to the empty winding bobbin B.

[0111] In the above embodiment, the case where the number of revolutions of the package P is detected by the rotation sensor 25 is described as an example. However, the number of revolutions of the package P can be calculated based on the detection result of a sensor that detects the inclination of the creel arm 21 and a sensor that detects the number of revolutions of the winding bobbin 22 provided in the spinning unit 2. Alternatively, the number of revolutions of the winding bobbin 22 can be calculated based on the elapsed time (length of time) from the start of winding of the yarn Y to the empty winding bobbin B. Figure 1 and Figure 4The middle drawing illustrates that the package P is wound in a cylindrical shape by the spinning machine 1, but it is also possible to wind the package in a conical shape. In the case of the conical shape, the diameter of the package P differs in the axial direction of the yarn pipe B, and therefore, the change in winding speed can become significant. In the conical shape, if the diameter of the package becomes large, the winding speed changes due to the slip generated between the package and the winding drum 22, the change in the driving point of the package in the winding drum 22, and the like.

[0112] Figure 6A Figure 6B Figure 6C is a graph showing the relationship between the diameter of the package and the winding speed. Figure 6A indicates the case where the driving point is located at the center of the package. Figure 6B indicates the case where the driving point is located at the large-diameter side of the package. Figure 6C indicates the case where the driving point is located at the small-diameter side of the package. As shown in Figure 6A Figure 6B Figure 6C In the conical shape, the winding speed changes according to the change in the diameter of the package, as shown in Figure 6B For example, as shown in Figure 6C , if the diameter of the package becomes large, the winding speed becomes significantly fast. In addition, as shown in , if the diameter of the package becomes large, the winding speed becomes significantly slow. Therefore, in the case of forming the conical shape, the structure of acquiring the winding speed to correct the reference speed and controlling the winding number and the twill angle of the package P based on the reference speed is particularly effective.

[0113] In the case of the conical shape, it is possible to provide a rubber belt at the center of the winding drum 22. Thereby, it is possible to set the driving point at the center of the package (the position of the rubber belt). In this case, compared with the case where the driving point is located at the large-diameter side or the small-diameter side of the package, it is possible to reduce the variation in the winding speed. In addition, since the reference speed is corrected by acquiring the winding speed, it is also possible not to use the rubber belt.

[0114] In addition, in the case of the conical shape, the driving point is set at the center in correspondence with the use of the rubber belt, and therefore, there is a case where the winding density of the yarn at the center in the width direction of the package is increased to make the center of the package hard. In this case, the winding density of both end portions of the package becomes sparse, and the size of the package becomes large. In the structure of acquiring the winding speed to correct the reference speed and controlling the winding number and the twill angle of the package based on the reference speed, it is not necessary to make the center of the package hard, and therefore, it is possible to avoid the size of the package from becoming large.

[0115] The material and the shape of each structure are not limited to the above-described material and shape, and various materials and shapes can be employed.​​​

Claims

1. Spinning machine, characterized in that, Possessing: a spinning device that generates a yarn; a winding device that winds the yarn generated by the spinning device to form a package; a yarn storage device that is disposed between the spinning device and the winding device, temporarily stores the yarn continuously fed from the spinning device, and feeds to the winding device; a traverse device that is disposed between the yarn storage device and the winding device, and makes the yarn wound to one of the packages traverse; a driving section that rotates one of the packages in the winding device; a winding speed acquisition section that acquires a winding speed of the yarn wound to the package; and a control section that controls the driving section and the traverse device based on the number of revolutions per unit time of the package and the winding speed, thereby controls the number of windings and the twill angle of the package, the control section, at the time of winding of the package, controls the amount of storage of the yarn stored in the yarn storage device by controlling at least the number of revolutions per unit time of the package, and controls the number of windings and the twill angle while controlling the amount of storage.

2. The spinning machine according to claim 1, wherein the winding device has a winding drum that rotates in a state of contact with the package, the control section controls the driving section in a state where the package is in contact with the winding drum.

3. The spinning machine according to claim 1, wherein the spinning device continuously spins the yarn at a constant speed at the time of winding of the package.

4. The spinning machine according to claim 2, wherein the spinning device continuously spins the yarn at a constant speed at the time of winding of the package.

5. The spinning machine according to any one of claims 1 to 4, wherein the control section controls the driving section and the traverse device so that the period of acceleration and deceleration of the rotation speed of the driving section is synchronized with the period of acceleration and deceleration of the traverse speed in the traverse device, thereby controls the twill angle.

6. The spinning machine according to claim 5, wherein the control section controls the rotation speed of the driving section stepwise.

7. The spinning machine according to claim 5, wherein the control section controls the driving section in such a manner that, in a constant period including a period during which the acceleration and deceleration of the rotation speed is performed in the driving section and a period during which the rotation speed is set to a constant speed, the period during which the acceleration and deceleration is performed is 25% or less of the constant period.

8. The spinning machine according to claim 6, wherein the control section controls the driving section in such a manner that, in a constant period including a period during which the acceleration and deceleration of the rotation speed is performed in the driving section and a period during which the rotation speed is set to a constant speed, the period during which the acceleration and deceleration is performed is 25% or less of the constant period.

9. The spinning machine according to claim 6, wherein the control section controls the rotation speed of the driving section based on a reference speed corresponding to a set spinning speed, The control section corrects the reference speed based on a difference between the winding speed and the reference speed.

10. The spinning machine according to claim 7, wherein The control section controls the rotational speed of the driving section based on a reference speed corresponding to a set spinning speed, The control section corrects the reference speed based on a difference between the winding speed and the reference speed.

11. The spinning machine according to claim 8, wherein The control section controls the rotational speed of the driving section based on a reference speed corresponding to a set spinning speed, The control section corrects the reference speed based on a difference between the winding speed and the reference speed.

12. The spinning machine according to any one of claims 1 to 4, 6 to 11, wherein There is provided a storage state detection section that detects a storage amount of the yarn and / or presence / absence of the yarn as a state of the yarn stored in the yarn storage device, The winding speed acquisition section acquires the winding speed based on the state of the yarn detected by the storage state detection section.

13. The spinning machine according to claim 5, wherein There is provided a storage state detection section that detects a storage amount of the yarn and / or presence / absence of the yarn as a state of the yarn stored in the yarn storage device, The winding speed acquisition section acquires the winding speed based on the state of the yarn detected by the storage state detection section.

14. The spinning machine according to any one of claims 1 to 4, 6 to 11, wherein There is provided a speed detection section that detects a speed of the traveling yarn, The winding speed acquisition section acquires the winding speed based on the speed of the yarn detected by the speed detection section.

15. The spinning machine according to claim 5, wherein There is provided a speed detection section that detects a speed of the traveling yarn, The winding speed acquisition section acquires the winding speed based on the speed of the yarn detected by the speed detection section.

16. The spinning machine according to any one of claims 1 to 4, 6 to 11, 13, 15, wherein The yarn storage device has: a yarn storage roller that stores the yarn by winding the yarn around an outer peripheral surface; and a yarn hooking member that winds the yarn around the outer peripheral surface of the yarn storage roller, The control section controls the driving section so that a distance between a point at which the yarn is unwound from the outer peripheral surface of the yarn storage roller and a point at which the yarn is engaged in the yarn hooking member becomes 10 cm or less.

17. The spinning machine according to claim 5, wherein The yarn storage device has: a yarn storage roller that stores the yarn by winding the yarn around an outer peripheral surface; and a yarn hooking member that winds the yarn around the outer peripheral surface of the yarn storage roller, The control section controls the drive section in such a manner that the distance between the point at which the yarn is unwound from the outer peripheral surface of the yarn storage roller and the point at which the yarn is engaged in the yarn hooking member becomes 10 cm or less.

18. The spinning machine according to claim 12, wherein The yarn storage device has: a yarn storage roller that stores the yarn by winding the yarn around an outer peripheral surface; and a yarn hooking member that winds the yarn around the outer peripheral surface of the yarn storage roller, the control section controls the drive section in such a manner that the distance between the point at which the yarn is unwound from the outer peripheral surface of the yarn storage roller and the point at which the yarn is engaged in the yarn hooking member becomes 10 cm or less.

19. The spinning machine according to claim 14, wherein The yarn storage device has: a yarn storage roller that stores the yarn by winding the yarn around an outer peripheral surface; and a yarn hooking member that winds the yarn around the outer peripheral surface of the yarn storage roller, the control section controls the drive section in such a manner that the distance between the point at which the yarn is unwound from the outer peripheral surface of the yarn storage roller and the point at which the yarn is engaged in the yarn hooking member becomes 10 cm or less.

20. The spinning machine according to any one of claims 1 to 4, 6 to 11, 13, 15, 17 to 19, wherein a rotation detection section that detects the number of rotations of the package is provided.

21. The spinning machine according to claim 5, wherein a rotation detection section that detects the number of rotations of the package is provided.

22. The spinning machine according to claim 12, wherein a rotation detection section that detects the number of rotations of the package is provided.

23. The spinning machine according to claim 14, wherein a rotation detection section that detects the number of rotations of the package is provided.

24. The spinning machine according to claim 16, wherein a rotation detection section that detects the number of rotations of the package is provided.

25. The spinning machine according to any one of claims 1 to 4, 6 to 11, 13, 15, 17 to 19, 21 to 24, wherein a setting section that sets the twill angle and the number of windings including a value after a decimal point is provided.

26. The spinning machine according to claim 5, wherein a setting section that sets the twill angle and the number of windings including a value after a decimal point is provided.

27. The spinning machine according to claim 12, wherein a setting section that sets the twill angle and the number of windings including a value after a decimal point is provided.

28. The spinning machine according to claim 14, wherein a setting section that sets the twill angle and the number of windings including a value after a decimal point is provided.

29. The spinning machine according to claim 16, wherein a setting section that sets the twill angle and the number of windings including a value after a decimal point is provided.

30. The spinning machine according to claim 20, characterized by a setting unit that sets the twill angle and the winding number including a value after a decimal point.

31. The spinning machine according to any one of claims 1 to 4, 6 to 11, 13, 15, 17 to 19, 21 to 24, 26 to 30, characterized by the control unit controls the driving unit and the traversing device in a manner that the package is formed by stepwise precision winding.

32. The spinning machine according to claim 5, characterized by the control unit controls the driving unit and the traversing device in a manner that the package is formed by stepwise precision winding.

33. The spinning machine according to claim 12, characterized by the control unit controls the driving unit and the traversing device in a manner that the package is formed by stepwise precision winding.

34. The spinning machine according to claim 14, characterized by the control unit controls the driving unit and the traversing device in a manner that the package is formed by stepwise precision winding.

35. The spinning machine according to claim 16, characterized by the control unit controls the driving unit and the traversing device in a manner that the package is formed by stepwise precision winding.

36. The spinning machine according to claim 20, characterized by the control unit controls the driving unit and the traversing device in a manner that the package is formed by stepwise precision winding.

37. The spinning machine according to claim 25, characterized by the control unit controls the driving unit and the traversing device in a manner that the package is formed by stepwise precision winding.

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