TW202014369A - Yarn winding device and yarn winding method - Google Patents

Abstract

The present invention suppresses fluctuations in winding ratio and prevents the surface shape of a package from being disturbed, even if creeping is performed during the execution of precision winding. The yarn winding machine comprises a guide driving unit that reciprocatingly drives a traverse guide and that can change the reversal position of the traverse guide during a yarn winding operation, and a control device. The control device can perform: a first reversing control wherein the traverse guide, which is traveling outward at a predetermined speed in the traversal direction, is decelerated, then reversed so as to travel inward at a first reversal position, and then re-accelerated to a predetermined speed; and a second reversing control wherein, the traverse guide, which is traveling outward at a predetermined speed in the traversal direction, is decelerated, then reversed so as to travel inward at a second reversal position further inward than the first reversal position, and then re-accelerated to a predetermined speed. The control device makes second reverse time (Trb) in the second reversing control longer than first reverse time (Tra) in the first reversing control during the execution of the precision winding.

Description

Silk winding machine and silk winding method

The present invention relates to a wire winding machine and a wire winding method.

Patent Document 1 discloses a wire winding machine that forms a package by winding a bobbin while traversing a wire by a traverse guide. The wire winding machine includes a bobbin driving motor that rotationally drives the bobbin, a guide driving mechanism that reciprocates the traverse guide by the guide driving motor, and a motor and guide for controlling the bobbin driving The control unit of the motor for driving. One of the winding methods of the yarn in such a yarn winding machine is to control the ratio of the rotation speed of the bobbin to the number of traverse times per unit time (winding ratio) to be constant so-called "precision winding" Winding method. In precision winding, the winding ratio is generally set to a value that is slightly different from the integer, so that the ribbon overlap winding does not occur (so that the yarn is not repeatedly wound on the same path on the package surface ). By setting in this way, in the precision winding, it is possible to avoid the overlapping winding of the ribbon, and the winding path of the filament on the package surface can be shifted little by little at a time, while the filament is parallel and regular Winding. Thereby, the unwinding properties (unwinding properties) of the yarn from the formed package can be improved, and the package density can be easily controlled according to the application of the package.

Unlike this, Patent Document 2 discloses a traverse device that can implement creeping to suppress protrusions on both sides of the package. The so-called bulge on both sides is caused by the sudden reversal (direction change) action of the traverse guidance that is generally considered to be more difficult, so that the amount of yarn wound on the axial end of the package surface is more than that of the other part. The amount of silk is still large. The protrusions on both sides may cause the deterioration of the package shape and/or the unevenness of the package density. Creep refers to temporarily narrowing the width of the reciprocating movement area (traverse width) of the traverse guide during package formation. In this way, compared with the case where creep is not performed, the amount of wire wound around the axial end of the package can be reduced, and the protrusions on both sides can be relaxed. [Prior Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 3-115060 [Patent Document 2] Japanese Unexamined Patent Publication No. 57-13058

[Problems to be solved by the invention]

In the wire winding machine described in Patent Document 1, when creeping during precision winding, the following problems may occur (in addition, for a more detailed description, it will be described in an embodiment described later). First, for example, if the traverse width is simply narrowed during creep compared to the normal traverse (hereinafter, simply referred to as "ordinary time"), the traverse period changes and the winding ratio cannot be kept constant. Therefore, on the package surface, the position where the yarn is actually wound will deviate from the position where the yarn is to be wound, causing the shape of the package surface to be disordered. Therefore, in order to prevent this loss, it is necessary to perform creep without changing the traverse cycle. However, for example, if the winding ratio is stabilized simply by differentiating the moving speed of the traverse guide between normal and creep, the angle between the wire and the package surface (winding) (Cross angle) There is mutual deviation between normal and creep. Therefore, the shape of the package surface will still be disturbed.

The object of the present invention is to suppress the fluctuation of the winding ratio and suppress the disturbance of the shape of the package surface even when creep is performed during the execution of precision winding. [Means to solve the problem]

The yarn winding machine of the first invention is capable of being wound around a rotating bobbin while traversing the moving yarn by traversing guidance, and performs precise winding while being used as the bobbin. The winding ratio of the rotation speed of the traverse guide to the number of reciprocating movements per unit time of the traverse guide is kept constant, and the yarn winding machine, which can form a package on one side, is characterized by including: a guide A driving unit and a control unit. The guide driving unit is used to reciprocate the traverse guide in a specific traverse direction, and can change the inverse of the traverse guide during the winding operation of the yarn. Turn position The control unit can perform a first reverse control and a second reverse control; the first reverse control is to control the guide drive unit to move outward at a specific speed in the traverse direction The traverse guide decelerates and reverses inward at a specific first reversal position, and then accelerates to the specific speed; the second reverse control is to control the guide drive unit for the traverse In the direction, decelerate the traverse guide that is moving outward at a specific speed and reverse inward at a second reverse position that is more inward than the first reverse position, and then accelerate to the specific Up to speed In the execution of the precision winding, the second reversal time, which is the time from the start of deceleration of the traverse guidance to the completion of reacceleration in the second reverse control, is set to be higher than that of the first In the reverse control, the first reverse time, which is the time from the deceleration of the traverse guidance to the completion of the reacceleration, is longer.

As a method for creeping on one side and performing precise winding normally on the other hand, when the traverse guide is reversed at the first reverse position (hereinafter, referred to as normal) and at the second reverse position In the case of reverse rotation (hereinafter referred to as creep), the winding ratio must be equalized. In order to make the winding ratio equal, for example, when the rotation speed of the bobbin is set to be constant, the movement period of the traverse guide must be made even when the width of the movement area of the traverse guide is narrower than usual. Same as usual.

In the present invention, the second inversion time is longer than the first inversion time. In this way, by actively increasing the reversal time during creep, the movement period of the traverse guidance during creep can be increased. In this way, the movement period of the traverse guide during normal time and creep can be made equal. Therefore, the fluctuation of the winding ratio can be prevented.

In addition, because of this, the traverse period during creep can be adjusted by the adjustment of the second reversal time. Therefore, at times other than the reversal time, the moving speed of the traverse guide can be adjusted between normal and creep. Equal time varying. Therefore, the angle of the filament wound on the package surface can be aligned. Therefore, it is possible to suppress the disorder of the shape of the package surface.

As described above, even if creep is performed during the execution of precision winding, the variation in the winding ratio can be suppressed, and the shape of the package surface can be prevented from being disturbed.

According to a second invention, in the first invention, the control unit is configured such that the longer the distance between the first reverse position and the second reverse position in the traverse direction, In the second reversal control, the width of the area where the traverse guide is moved in the traverse direction during the second reversal time is wider as the characteristic.

In order to suppress the fluctuation of the winding ratio and suppress the shape disorder of the package surface, the longer the distance between the first reverse position and the second reverse position (that is, the narrower the traverse width during creep), The second reversal time must be increased. Here, when the width of the region (hereinafter referred to as the reversal region) of the traverse guide moving in the traverse direction is constant during the second reversal time, if the second reversal time is lengthened, the horizontal The dynamic guidance becomes a region that is continuously located near the second reverse position for a long time during the second reverse control. In this way, the filament will be easily concentrated around the narrow area of the package surface. As a result, a step difference is likely to be formed on the package surface, and there may be a phenomenon such as a skipping phenomenon in which the yarn overlaps and collapses, which may adversely affect the shape of the package.

In the present invention, the longer the distance between the first reverse position and the second reverse position, the wider the width of the reverse area. That is, in the case where the second reversal time becomes longer by narrowing the traverse width at the time of creep, in the second reverse control, the area where the traverse guide can move becomes wider. Therefore, it is possible to prevent the traverse guide from continuing to stay in the narrow area in the traverse direction for a long time. Therefore, it is possible to suppress the concentrated winding of the yarn in the narrow area of the package surface.

According to a third aspect of the invention, in the first or second invention, the control unit is the second reversal control, and after the deceleration of the traverse guide is started, the first 2 As half of the reversal time, the traverse guide controls the guide drive unit such that it is positioned at the second reversal position in the traverse direction, as a characteristic feature.

In the second reverse control, for example, the traverse guide may be abruptly decelerated to reach the second reverse position, and then slowly accelerated again. However, in this case, the shape of the reverse portion of the filament wound on the package surface may be significantly different between the deceleration of the traverse guide and the reacceleration. Therefore, the shape of the filament on the package surface at the reversal portion becomes asymmetric, and there is a possibility that the reversal portion may not be formed neatly and beautifully. In the present invention, the time from the start of deceleration of the traverse guide until the traverse guide reaches the second reverse position, and the time from the traverse guide away from the second reverse position to the completion of reacceleration Set equal. With this, the shape of the yarn at the inversion portion can be implemented into a symmetrical shape with the central axis of the package as the center line (that is, the inversion portion can be formed neatly and beautifully). Therefore, it is possible to suppress the shape disorder of the reversal portion of the package surface.

The yarn winding machine of the fourth invention is in any one of the first to third inventions, and includes a bobbin driving section that rotationally drives the bobbin; the control section includes a memory section to memorize Information about the relationship between the rotation angle of the bobbin and the position of the traverse guide in the traverse direction; controlling the bobbin drive unit and the guide drive unit based on the information stored in the memory unit, As its characteristic.

In the present invention, by controlling the information based on the relationship between the rotation angle of the bobbin and the position of the traverse guide, for example, compared to the case where the control is performed using a complicated mechanical structure, the winding ratio can be continued Maintain it at a constant level while creeping at the same time to make such complex movements easier. In addition, by overwriting the information, the position and/or speed of the traverse guide during the second reverse control can be easily adjusted.

According to a fifth aspect of the invention, in the yarn winding machine according to any one of the first to fourth inventions, the guide driving unit includes a driving source configured to be driven forward and reverse, and is characterized by the above.

For example, in a general cam type traverse device, a motor rotating in one direction is used as a driving source, and the structure for creeping becomes a complicated mechanical structure. Therefore, in the cam-type traverse device, it is difficult to perform fine control of creep. In the present invention, the forward and backward driving of the driving source can reciprocate the traverse guide. Therefore, the position and timing of the reversal of the traverse guidance can be finely controlled by the control unit. Therefore, fine control of creep can be easily performed.

According to a sixth invention, in the fifth invention, the guide drive unit includes a belt member to which the traverse guide is attached and is reciprocally driven by the drive source as its Characteristic.

For example, in a configuration in which the traverse guide is attached to the front end portion of a swingable arm and the arm is driven to rock, the traverse guide reciprocates by drawing an arc. Therefore, even if precise winding is performed, there is a fear that it is difficult to wind the yarn regularly and neatly on the package surface. In the present invention, the reciprocating drive is performed by stretching the portion of the belt member to which the traverse guide is attached to a linear shape, so that the traverse guide can be easily reciprocated linearly. Therefore, the yarn can be easily wound on the package surface regularly.

The yarn winding method of the seventh invention is to guide the traversing yarn while traversing it and wind it on the rotating bobbin while performing precise winding while using it as the bobbin. The winding ratio of the rotation speed to the number of reciprocating movements per unit time of the traverse guide is maintained constant, and the yarn winding method capable of forming a package on one side is characterized by performing the first reversal process and the first 2 Reverse process; The first reverse process is to decelerate the above traverse guide moving outward at a specific speed in a specific traverse direction, reverse inward at a specific first reverse position, and then accelerate Up to the specific speed; the second reverse process is to decelerate the traverse guide that is moving outward at the specific speed in the traverse direction, and is located at a position higher than the first reverse direction In addition, the second reversal position on the inner side should be reversed toward the inner side, and then accelerated to the specific speed mentioned above; In the execution of the above-mentioned precision winding, the second reversal time, which is the time from the deceleration of the traverse guidance to the completion of the reacceleration in the second reversal process, is set to be higher than the first reversal time. In the reverse process, the first reverse time, which is the time from the start of deceleration of the traverse guide to the completion of reacceleration, is longer.

In the present invention, as in the first invention, even if creep is performed during the execution of the precision winding, the fluctuation of the winding ratio can be suppressed, and the shape of the package surface can be suppressed from being disturbed.

Next, the embodiment of the present invention will be described with reference to FIGS. 1 to 9. The up-down direction and the left-right direction shown in FIG. 1 are referred to as the up-down direction and the left-right direction of the rewinder 1, respectively. The direction orthogonal to both the up-down direction and the left-right direction (the direction perpendicular to the paper surface in FIG. 1) is taken as the front-back direction. Let the moving direction of the wire Y be the moving direction of the wire.

(Structure of Rewinding Machine) First, using FIG. 1, the structure of the rewinder 1 (the yarn winding machine of this invention) in this embodiment is demonstrated. Fig. 1 is a schematic view of the rewinding machine 1 viewed from the front. As shown in FIG. 1, the rewinder 1 includes a yarn feeding unit 11, a winding unit 12, a control device 13 (control unit of the present invention), and the like. The rewinding machine 1 unwinds the yarn Y from the yarn feeding package Ps supported by the yarn feeding section 11, and then unwinds the winding bobbin Bw (bobbin of the present invention) by the winding section 12 to Those who form a winding package Pw (a package of the present invention). More specifically, the rewinding machine 1 is, for example, used to rewind the yarn Y wound on the yarn feeding package Ps more neatly, or to form a winding package Pw having a desired density.

The wire feeding section 11 is, for example, installed in front of the lower part of the stand 14 which is erected. The wire feeding portion 11 is configured to support the wire feeding package Ps, which is formed around the wire Y around the wire feeding bobbin Bs. As a result, the yarn feeder 11 can supply the yarn Y.

The winding section 12 is for winding the yarn Y around the winding bobbin Bw to form a winding package Pw. The winding unit 12 is provided on the upper part of the machine table 14. The winding section 12 includes a cradle arm 21, a winding motor 22 (bobbin driving section of the present invention), a traverse device 23, a contact pressure roller 24, and the like.

The cradle arm 21 is supported, for example, by the machine table 14 in a swingable manner. The cradle arm 21 rotatably supports the winding bobbin Bw with the left-right direction as the axial direction of the winding bobbin Bw, for example. A bobbin holder (not shown) for holding the winding bobbin Bw is rotatably attached to the front end portion of the cradle arm 21. The winding motor 22 is used to rotate and drive the bobbin holder. The winding motor 22 is, for example, a general AC motor, and can be configured to change the rotation speed. As a result, the winding motor 22 can change the rotation speed of the winding bobbin Bw. The winding motor 22 is electrically connected to the control device 13 (refer to FIG. 2).

The traverse device 23 is a device that traverses the yarn Y in the axial direction of the winding bobbin Bw (in this embodiment, the left-right direction). The traverse device 23 is arranged on the upstream side immediately in the moving direction of the filament of the winding package Pw. The traverse device 23 includes a traverse motor 31 (a guide drive unit of the present invention), an endless belt 32 (a belt member of the present invention), and a traverse guide 33.

The traverse motor 31 is, for example, a general AC motor. The traverse motor 31 is configured to be capable of forward drive and reverse drive, and is a drive source capable of changing the rotation speed. The traverse motor 31 is electrically connected to the control device 13 (please refer to FIG. 2). The endless belt 32 is a belt member to which the traverse guide 33 is attached. The endless belt 32 is wound around a pulley 34 and a pulley 35 arranged to be separated from each other in the left-right direction, and a driving pulley 36 connected to the rotating shaft of the traverse motor 31, and is stretched into a substantially triangular shape. The endless belt 32 is reciprocally driven by the traverse motor 31. The traverse guide 33 is attached to the endless belt 32, and is arranged between the pulley 34 and the pulley 35 in the left-right direction. In the traverse guide 33, the endless belt 32 is reciprocally driven by the traverse motor 31, thereby linearly reciprocating in the left-right direction (refer to the arrow in FIG. 1). Thereby, the traverse guide 33 traverses the yarn Y in the left-right direction. In the following, the left-right direction is also referred to as the traverse direction. In the traverse device 23 having the above-described configuration, by controlling the timing of switching the direction of rotation of the rotary shaft of the traverse motor 31, etc., the moving area of the traverse guide 33 can be changed during the winding operation of the yarn Y The width (traverse width).

The contact pressure roller 24 applies contact pressure to the surface of the winding package Pw to adjust the shape of the winding package Pw. The contact pressure roller 24 comes into contact with the winding package Pw and rotates following the rotation of the winding package Pw.

In the yarn moving direction, between the yarn feeding portion 11 and the winding portion 12, the yarn guide 15, the guide roller 16, and the tension sensor 17 are arranged in this order from the upstream side. The wire guide 15 is, for example, arranged on an extension of the central axis of the wire feeding bobbin Bs, and guides the unwound yarn Y from the wire feeding package Ps toward the downstream side in the yarn moving direction. The guide roller 16 is used to guide the yarn Y guided by the yarn guide 15 further toward the downstream side in the yarn moving direction. The guide roller 16 is arranged in front of the machine table 14 and above the wire guide 15. The guide roller 16 is rotatably driven by a roller drive motor 18, for example. The roller drive motor 18 is, for example, a general AC motor, and can be configured by changing the rotation speed. As a result, the roller drive motor 18 can change the rotation speed of the guide roller 16. The roller drive motor 18 is electrically connected to the control device 13 (please refer to FIG. 2). In the present embodiment, the tension of the yarn Y is given by the difference between the peripheral speed of the guide roller 16 and the peripheral speed of the winding package Pw.

The tension sensor 17 is arranged between the winding package Pw and the guide roller 16 in the yarn moving direction to detect the tension applied to the yarn Y. The tension sensor 17 is electrically connected to the control device 13 (please refer to FIG. 2), and transmits the tension detection result to the control device 13.

The control device 13 includes a CPU, ROM, RAM (memory unit 19), and the like. The memory unit 19 stores, for example, parameters such as the winding amount and winding speed of the yarn Y, and the tensile strength imparted to the yarn Y. The control device 13 is based on the parameters stored in the RAM (memory unit 19) and the like, and follows the program stored in the ROM, and the CPU controls each unit.

In the rewinding machine 1 as described above, the yarn Y unwound from the yarn feeding package Ps moves toward the downstream side in the moving direction. The moving yarn Y is traversed in the left-right direction (traverse direction) by the traverse guide 33 while being wound by the winding bobbin Bw in rotation (winding operation of the yarn).

(Movement control of traverse guidance) Next, the basic movement control of the traverse guide 33 by the control device 13 will be described using FIG. 3. Fig. 3 (a) is a graph showing the relationship between the position of the traverse guide 33 in the traverse direction and time. Fig. 3(b) is a graph showing the relationship between the speed of the traverse guide 33 in the traverse direction and time.

The memory portion 19 of the control device 13 (please refer to FIG. 2) stores information about the width of the traverse. The control device 13 controls the traverse motor 31 according to the information stored in the memory unit 19. Thereby, the endless belt 32 is driven reciprocally, and the traverse guide 33 reciprocates in the traverse direction.

In the graph shown in FIG. 3(a), the horizontal axis indicates the time, and the vertical axis indicates the position of the traverse guide 33 in the traverse direction. Considering the convenience of the explanation, in the left-right direction, the traverse guide 33 is positioned to the left of the center of the area where the reciprocating movement (traverse area) is performed as the positive direction of the vertical axis of the graph. In addition, the right side of the center of the traverse area is taken as the negative direction of the vertical axis of the graph.

As an example, when the traverse width is W, as shown in FIG. 3(a), the traverse guide 33 reciprocates in the area of -W/2 to W/2 in the traverse direction . More specifically, for example, at a specific time (the left end of the graph in FIG. 3(a)), the traverse guide 33 is located at the right end (-W/2 position). After a certain time (set to T), the traverse guide 33 moves to the left end (W/2 position). After that, the traverse guide 33 is reversed to the right and reaches the right end again. By repeating this action, the traverse guide 33 reciprocates.

As shown in the graph shown in FIG. 3(b), the horizontal axis represents time, and the vertical axis represents the speed of the traverse guide 33 in the traverse direction. Hereinafter, specific examples will be described. When the traverse guide 33 is located at the right end (-W/2 position), the speed of the traverse guide 33 is 0. The control device 13 controls the traverse motor 31 to accelerate the traverse guide 33 to a specific speed (set to V). Then, the control device 13 maintains the speed of the traverse guide 33 constant until the traverse guide 33 reaches near the left end (the position of W/2). When the traverse guide 33 reaches near the left end, the control device 13 controls the traverse motor 31 to perform reverse control as follows. That is, the control device 13 decelerates the traverse guide 33 moving to the left (outside in the traverse direction), and reverses it to the right (inside in the traverse direction) at the position of W/2 . Then, the control device 13 accelerates the traverse guide 33 again to a specific speed (refer to -V in FIG. 3 (b)). In the present embodiment, the time from the start of deceleration of the traverse guide 33 to the completion of reacceleration in reverse control is referred to as the reverse time (shown in (a) and (b) of FIG. 3 Tr).

(Precision winding and creep) Next, precision winding and creep will be described using Figs. 4 (a) to (c). Figures 4 (a) and (b) are explanatory diagrams of the precision winding and the drawing after the winding package Pw is unfolded in the direction of the rotation angle. For convenience of explanation, as shown in FIGS. 4 (a) and (b), the rotation angle of the winding package Pw at the upper end of the paper surface is regarded as 0 degrees, and the rotation angle at the lower end of the paper surface is regarded as 360 degrees. Fig. 4(c) is an explanatory diagram of creep.

First, the precision winding will be described. The so-called precision winding is a method of maintaining a constant winding ratio of the rotation speed of the winding bobbin Bw to the number of reciprocating movements per unit time of the traverse guide 33 (winding ratio). Thereby, regardless of the winding diameter of the winding package Pw, the relationship between the rotation angle of the winding bobbin Bw and the position of the traverse guide 33 in the traverse direction can be controlled.

In the memory section 19 of the control device 13 (please refer to FIG. 2), for example, information about the relationship between the rotation angle of the winding bobbin Bw and the position of the traverse guide 33 in the traverse direction (table and calculation) formula). As a specific example, the memory 19 stores information about the rotation angle of the winding bobbin Bw, the acceleration/deceleration start position and the reverse rotation position of the traverse guide 33 in the traverse direction. In addition, a calculation formula is stored in the memory section 19, and the calculation formula is used to calculate the speed of the traverse guide 33 and the related information of the position of the traverse guide 33 based on the rotation angle of the winding bobbin Bw /Or acceleration. The control device 13 controls the winding motor 22 and the traverse motor 31 according to the information stored in the memory unit 19. In the present embodiment, the control device 13 controls the winding motor 22 so as to maintain the rotation speed of the winding bobbin Bw at a constant level. As an initial example, as shown in FIG. 4(a), when the winding ratio is set to 5, the traverse guide 33 reciprocates once, and the winding bobbin Bw rotates five times. That is, as shown in FIG. 4(a), each time the traverse guide 33 performs one reciprocation, the winding package Pw rotates the winding yarn Y five times.

In addition, in the case where the winding ratio is an integer as described above, on the surface of the winding package Pw, there is a problem that the yarn Y is repeatedly wound on the same path (so-called overlapping overlapping winding occurs). To avoid this problem, in practice, as shown in FIG. 4(b), the winding ratio is set to a value slightly different from an integer (for example, 5+α). By setting in this way, in the precision winding, it is possible to avoid ribbon-like overlapping winding, and it is possible to wind the yarn Y while shifting the winding path of the yarn Y on the surface of the winding package Pw little by little at a time Parallel and regular winding. Thereby, the unwinding property (unwinding property) of the yarn Y from the winding package Pw in the post-process can be improved, and the package density can be easily controlled according to the application of the winding package Pw.

Next, the creep will be described. The creep is for the purpose of suppressing protrusions on both sides of the winding package Pw, and temporarily changes the traverse width during the winding operation of the yarn Y. The so-called bulge on both sides is caused by the sudden reversal of the traverse guide 33, which is generally considered to be difficult, etc., so that the amount of yarn wound on the axial end of the surface of the winding package Pw is higher than that of the yarn wound on other parts. The amount is still large. As a result, it becomes easy to form a step difference on the surface of the winding package Pw, and there is a fear that a yarn skipping phenomenon in which the yarn Y overlaps and collapses may occur. In addition, it may cause the deterioration of the shape of the winding package Pw and/or the unevenness of the density of the winding package Pw.

As described above, the traverse device 23 is configured by the traverse motor 31 reciprocatingly driving the endless belt 32 to which the traverse guide 33 is attached. Therefore, by controlling the traverse motor 31 with the control device 13, the reverse position of the traverse guide 33 can be arbitrarily changed. As an example, as shown in FIG. 4(c), the control device 13 can switch the traversing width between the specific first width (Wa) and the second width (Wb) smaller than the first width ( That is, it can be configured to creep. In the following, when the traversing width is the first width, it is regarded as the ordinary time, and when the traversing width is the second width, it is regarded as the creep time. The distance between the reverse position of the traverse guide 33 at ordinary times and the reverse position of the traverse guide 33 at creep is ΔW (=(Wa-Wb)/2). Hereinafter, this distance is also referred to as creep. The control device 13 can change the creep amount by controlling the traverse motor 31. Creep variable is generally about 5mm ~ 20mm, but it is not limited to this. In addition, the control device 13 can perform creep at any timing. As an example thereof, as shown in FIG. 4(c), the control device 13 may perform creep once every three reciprocations of the traverse guide 33. By performing creep, the amount of wire wound at the axial end of the winding package Pw can be reduced compared to the case where creep is not performed, and the protrusion on both sides can be relaxed.

Here, if creep is to be performed during the precision winding process, the following problems will occur. Specifically, it will be described using FIGS. 5 (a) and (b) and FIGS. 6 (a) and (b). Figure 5(a) shows the relationship between the speed of the traverse guide 33 and time when the traverse width is simply narrowed during creep (details will be described later), and is related to Figure 3(b ) Is a graph with the same coordinate axis. Fig. 5(b) is an explanatory diagram showing the path of the yarn Y wound on the surface of the package Pw when the traverse width is simply reduced during creep, and is the left end of the package Pw Zoom in. Figure 6(a) shows the relationship between the speed of the traverse guide 33 and the time when the traverse speed is simply slowed down during creep (details will be described later), and is related to Figure 3(b ) Is a graph with the same coordinate axis. Fig. 6(b) is an explanatory diagram showing the path of the yarn Y wound on the surface of the package Pw when the traverse speed is simply slowed down during creep, and is the left end of the package Pw Enlarged image. In addition, in the graphs shown in FIGS. 5(a) and 6(a), the solid line indicates the normal traverse speed, and the broken line indicates the traverse speed during creep.

First, a description will be given of a case where the traversing width is simply narrowed compared to the usual during creep. By simply narrowing the traverse width, as shown in FIG. 5(a), it means that the traverse speed (V) is not changed except during the above-mentioned reversal time (Tr) and reverse control, but only Only change the timing of execution of the reverse control. In this case, during creep, the traverse guide 33 is reversed only earlier than usual to narrow the traverse width. In this way, during creep, the traverse period becomes shorter than usual. Therefore, the precision winding is not performed normally, and the path of winding the yarn Y on the surface of the package Pw becomes as shown in FIG. 5(b). That is, the yarns Y1 and Y2 that are normally wound around the winding package Pw as a part of the yarn Y are reversed at points 101 and 102 on the end surface Pw1 of the winding package Pw, respectively. In addition, the yarn Y3 which is a part of the yarn Y wound around the winding package Pw during creep is reversed at a point 103 which is a distance ΔW more inside than the points 101 and 102 in the traverse direction. . Point 103 is a reversal position (point 104) that assumes that the traversing width of the yarn Y3 when wound is the same as usual (point 104), and is located in the non-reaching position in the rotation angle direction that has not yet reached the point 104. That is, the yarn Y3 is wound in a state where the yarn Y deviates greatly from the winding path 105 compared to the case where creep is not performed. Therefore, the shape of the surface of the winding package Pw may cause disturbance.

Next, a description will be given of a case in which the traverse speed is simply slowed down compared to the usual during creep. The so-called simply slowing down the traverse speed, as shown in Fig. 6(a), means that the reversal time (Tr) and the execution timing of the reversal control will not be changed. The traverse speed slows down. For example, when the normal traversing speed is Va and the creep traversing speed is Vb, Vb<Va. In this case, since the traverse cycle is the same as in normal creep, the winding ratio is also kept constant. In this case, as shown in FIG. 6(b), the yarn Y3 wound during creep is reversed at point 106. Point 106 is located at the same angle as point 104 in the rotation angle direction. However, in this case, due to the change in the traverse speed, the included angle (winding cross angle) of the yarn Y and the winding package Pw will deviate from each other at ordinary times and creep. That is, the yarns Y1 and Y2 that are wound as part of the yarn Y in the winding package Pw in normal times and the yarn Y3 that is part of the yarn Y in the winding package Pw during creep will become Not parallel to each other. Therefore, the shape of the surface of the winding package Pw will still cause disturbance. Here, in the present embodiment, during the execution of precision winding, the change in the winding ratio can be suppressed even if creep is performed, and in order to suppress the shape disorder of the surface of the winding package Pw, the control device 13 performs The following control.

(Detailed description of wire winding method using reverse control) For details of the yarn winding method using the above-described inversion control performed by the control device 13, FIGS. 7(a), (b), 8(a), (b), and 9th are used. Figures (a) and (b) illustrate this. Fig. 7(a) is a graph showing the relationship between the position of the traverse guide 33 in the traverse direction and time. FIG. 7(b) is a graph showing the relationship between the speed of the traverse guide 33 in the traverse direction and time. Fig. 8(a) is a graph of the relationship between the acceleration of the traverse guide 33 in the traverse direction and time. Fig. 8(b) is a graph showing the relationship between the width of the inversion area and the creep amount described later. Fig. 9 (a) and Fig. 9 (b) are paths showing the yarn Y on the surface of the winding package Pw, and Fig. 5 (b) and Fig. 6 (b) are explanatory diagrams with the same coordinate axis. In the following description, the rotation speed of the winding package Pw is set to be constant.

First, the control device 13 performs the following control as a normal inversion control (first inversion control). In the first reverse control, the control device 13 reverses the traverse guide 33 at the first reverse position in the traverse direction (Wa/2 of FIG. 7(a)) (first reverse) Process). In the first reverse control, the time from the start of deceleration of the traverse guide 33 to the completion of reacceleration is taken as the first reverse time (Tra). In addition, the control device 13 performs the following control as an inversion control during creep (second inversion control). The control device 13 is to reverse the traverse guide 33 (second reverse) at the second reverse position in the traverse direction (Wb/2 in FIG. 7(a)) in the second reverse control Process). In the second reverse control, the time from the start of deceleration of the traverse guide 33 to the completion of reacceleration is taken as the second reverse time (Trb). In addition, the traverse guide 33 uses a region moving in the traverse direction as a reversal region during the period from the start of deceleration to the completion of reacceleration. The width of the inversion area in the second inversion control is, for example, Wt (please refer to FIG. 7(a)).

As shown in FIG. 7(a), the control device 13 extends the second inversion time to be longer than the first inversion time (Trb>Tra). To explain from another point of view, the control device 13 causes the traverse guide 33 to slowly accelerate and decelerate during the second reverse control compared to the first reverse control. More specifically, compared with the maximum value of the acceleration during the first reversal time during the first reversal control (set as Aa), it is reduced during the second reversal control during the second reversal time. The maximum value of acceleration (set to Ab) (please refer to figure 8(a)). In other words, compared to the time average value of the acceleration during the first reversal time during the first reverse control, it is the time average value of the acceleration during the second reverse time during the second reverse control.

With this, even if the traverse width is different from the normal time and the creep time, the traverse period can be made equal (refer to FIG. 7(a)). That is, the fluctuation of the winding ratio can be suppressed. In addition, the control device 13 is to make the traverse speeds other than the reverse rotation control equal to the creep during normal times (refer to FIG. 7(b)). Furthermore, the control device 13 uses the traverse guide when the deceleration of the traverse guide 33 is started until half of the second reverse time (Trb/2) has passed in the second reverse control. The traverse motor 31 is controlled so that 33 is in the second reverse position.

By performing the above-mentioned control, the yarn Y is wound on the winding package Pw as shown in FIG. 9(a). That is, the portion of the yarn Y wound around the winding package Pw during the creep (filament Y3) is reversed in the traverse direction at the point 107. Point 107 is at the same position as point 104 described above in the rotation angle direction. Also, during the second reverse control (that is, when the traverse guide 33 is moving in the reverse area described above), the yarn Y3 is wound around the winding package Pw in an arc-shaped manner (please refer to page 9). The hatched area 201 in Fig. (a)). In addition, since the traverse speed other than the reverse rotation control is equal to that during normal creep and creep, the winding angle other than the reverse rotation control is equal to both normal and creep. As a result, the yarn Y3 is wound along the above-mentioned path 105 on the inner side in the traverse direction than the region 201. That is, in the present embodiment, the precise winding is normally performed, and the shape of the surface of the winding package Pw can be suppressed from being disturbed.

Also, as described above, when the deceleration of the traverse guide 33 is started until half of the second reverse time (Trb/2) has passed, the traverse guide 33 is located at the second reverse position. Therefore, the inverted portion of the yarn Y3 has a symmetrical shape with the center axis of the winding package Pw as the center line. That is, the inverted portion of the wire Y3 can be formed neatly and beautifully.

In addition, the control device 13 is such that the larger the creep amount, the wider the width of the reversal region in the traverse direction (refer to FIG. 8(b)). For example, when the creep amount is ΔW1 greater than ΔW, the control device 13 sets the width of the inversion region to Wt1 wider than Wt (see (a) and (b) of FIG. 9). That is, when the second reversal time is lengthened by narrowing the traverse width during creep, the traverse guide 33 can be expanded in the traverse direction during the second reversal control. area. Therefore, it is possible to suppress the traverse guide 33 from staying in a narrow area in the traverse direction for a long time. In this case, the arc drawn when the yarn Y3 is wound around the winding package Pw is increased (refer to the area 202 in FIG. 9(b)).

As described above, the second inversion time is longer than the first inversion time. In this way, by actively lengthening the reversal time during creep, the movement period of the traverse guide 33 during creep can be increased. Thereby, the movement period of the traverse guide 33 can be made equal to the creep time at ordinary times. Therefore, the fluctuation of the winding ratio can be prevented.

Furthermore, in this way, by adjusting the second reversal time, the traverse period during creep can be adjusted. Therefore, in the time other than the reversal, the moving speed of the traverse guide 33 can be adjusted to the creep at ordinary times. Time is equal. Therefore, the angle of the filament Y wound on the surface of the winding package Pw can be aligned. Therefore, the shape of the surface of the winding package Pw can be suppressed from being disturbed.

Also, the larger the creep, the wider the reversal area. That is, when the second reversal time is made longer by narrowing the traverse width at the time of creep, the area where the traverse guide 33 can move in the second reverse control becomes wider. Therefore, it is possible to suppress the traverse guide 33 from staying in a narrow area in the traverse direction for a long time. Therefore, it is possible to suppress the yarn Y from being concentratedly wound around the narrow region on the surface of the winding package Pw.

In addition, the time from the start of deceleration of the traverse guide 33 to the time when the traverse guide 33 reaches the second reverse position can be equal to the time from the time the traverse guide 33 leaves the second reverse position to the completion of reacceleration. Thereby, the shape of the inverted portion of the yarn Y can be set to a symmetrical shape with the central axis of the winding package Pw as the center line (that is, the inverted portion can be formed neatly and beautifully). Therefore, it is possible to suppress the shape disorder of the reverse portion of the surface of the winding package Pw.

In addition, the control device 13 controls based on the information about the relationship between the rotation angle of the winding bobbin Bw and the position of the traverse guide 33. By this, compared with, for example, a case where a complicated mechanical structure is used for control, it is possible to maintain the winding ratio at a constant level while also performing creep to facilitate complicated operations. In addition, by overwriting this information, the position and speed of the traverse guide 33 at the time of the second reverse control can be easily adjusted.

In addition, the traverse motor 31 is configured to be capable of forward and reverse driving. Thereby, the traverse guide 33 can reciprocate by forward and reverse driving of the traverse motor 31. Therefore, the control unit can precisely control the reverse position and time of the traverse guide 33. Therefore, fine control of creep can be easily performed.

In addition, by stretching the portion of the endless belt 32 to which the traverse guide 33 is attached to a linear shape and reciprocatingly driving, the traverse guide 33 can be easily reciprocated linearly. Therefore, the yarn Y can be easily wound regularly on the surface of the winding package Pw.

Next, a modified example in which changes are added to the above embodiment will be described. However, for those having the same configuration as the above-mentioned embodiment, the same symbols are denoted and the description thereof is omitted as appropriate.

(1) In the above-mentioned embodiment, the control device 13 is set to cause the traverse guide 33 to slowly accelerate and decelerate in the second reverse control compared to the first reverse control, but does not Not limited by this. For example, as shown in FIGS. 10 (a), (b), and 11, the control device 13 may also set the maximum value of the acceleration during the second reversal time during the second reversal control to It is equal to the maximum value of the acceleration in the first reversal time during the first reversal control. In addition, the control device 13 may stop the traverse guide 33 at the second reverse position in the traverse direction for a predetermined time and then accelerate it. In this way, the second inversion time may be set to be longer than the first inversion time. When the second reversal control in the above embodiment is referred to as A control, and the second reversal control in the above-described modification (FIG. 10 (a), (b), and FIG. 11) is referred to as B control, the control The device 13 can also perform the following control. That is, the control device 13 may perform only A control as the second reversal control during the winding operation, or only perform B control. Alternatively, the control device 13 may be combined with A control and B control during the winding operation. More specifically, the control device 13 may be used as the second inversion control by repeatedly performing the A control and the B control in a specific pattern. As an example of the above-mentioned repetition, the control device 13 may interactively perform A control and B control.

(2) In the embodiments up to the above, the larger the creep value, the larger the width of the reversal region of the traverse guide 33 in the traverse direction, but it is not limited thereto. The width of the reversal area may be kept constant regardless of creep.

(3) In the embodiments up to the above, the control device 13 is set in the second reverse control when the deceleration of the traverse guide 33 is started until half of the second reverse time has passed, The traverse motor 31 is controlled so that the traverse guide 33 is located at the second reverse position. But it is not limited by this. For example, in the second reverse control, the control device 13 may perform control such as first decelerating the traverse guide 33 abruptly and then slowly accelerating again. Alternatively, the control device 13 may perform control such as first decelerating the traverse guide 33 slowly and then rapidly accelerating it in the second reverse control.

(4) In the embodiments up to the above, the memory unit 19 of the control device 13 stores both the table and the calculation formula as the rotation angle and traverse guidance regarding the winding bobbin Bw 33. Information on the relationship of the position in the traverse direction, but not limited to this. For example, in the memory section 19, only the calculation formula for calculating the position and/or speed of the traverse guide 33 according to the rotation angle of the winding bobbin Bw may be stored. That is, the control device 13 may constantly calculate the position and/or speed of the traverse guide 33 based on the rotation angle and calculation formula of the winding bobbin Bw during the winding operation. Or, in the memory section 19, only a table may be stored as information about the relationship between the rotation angle of the winding bobbin Bw and the position, speed, and acceleration of the traverse guide 33.

(5) In the embodiments up to the above, the traverse guide 33 is set to be attached to the endless belt 32, but it is not limited thereto. For example, the traverse guide 33 may be attached to the front end of the swing drive arm (refer to Japanese Patent Application Laid-Open No. 2007-153554, etc.). Or, the traverse guide 33 may be driven reciprocally by a linear motor or the like.

(6) In the embodiments up to the above, the traverse guide 33 is driven by a driving source that can be driven forward and backward, but it is not limited thereto. For example, the rewinding machine 1 may be a cam-type traverse device including a motor that rotates and drives in a single direction as a drive source.

(7) In the embodiments up to the above, the rotation speed of the winding bobbin Bw is set to be constant, but it is not limited thereto. That is, the control device 13 only needs to control the winding motor 22 and the traverse motor 31 to maintain a constant winding ratio in order to perform precise winding, so the winding drum can also be changed during the winding operation The rotation speed of the tube Bw.

(8) The present invention is not limited to the rewinder 1, but can also be applied to various yarn winding machines.

1: Rewinding machine (wire winding machine) 11: Silk feeding department 12: Winding section 13: Control device (control section) 14: Machine 15: Wire guide 16: Guide roller 17: Tension sensor 18: roller drive motor 19: Memory Department 21: Cradle arm 22: Winding motor (bobbin drive section) 24: contact pressure roller 31: Traverse motor (guide drive unit) 32: endless belt (belt member) 33: Traverse guidance 34: Pulley 35: Pulley 36: Drive pulley 101～104、106、107: (reverse) point 105: winding path 201, 202: shaded diagonal area Aa: the maximum value of acceleration in the first reversal time Ab: the maximum value of acceleration in the second reversal time Bs: wire feeding bobbin Bw: winding bobbin (bobbin) Ps: wire feeding package Pw: winding package (package) Pw1: the end face of the winding package (Pw) T: Time when the traverse guide (33) moves from the right end to the left end Tr: Reverse time Tra: 1st reversal time Trb: 2nd reversal time V: Specific speed of traverse guide (33) Va: the traverse speed of the traverse guide (33) at ordinary times Vb: Traverse speed of the traverse guide (33) during creep W: traverse width of traverse guide (33) Wa: 1st width Wb: 2nd width Wt, Wt1: the width of the inversion area in the second inversion control ΔW, ΔW1: the distance between the reverse position of the traverse guide (33) at ordinary times and the reverse position at the time of creep Y(Y1～Y3): silk

Fig. 1 is a schematic view of the rewinding machine of this embodiment viewed from the front. Figure 2 is a diagram showing the electrical configuration of the rewinder. Figure 3 (a) is a graph showing the relationship between the position of the traverse guide and time; (b) is a graph showing the relationship between the speed of the traverse guide and time. Figure 4 (a) and (b) are explanatory diagrams of precision winding; (c) are explanatory diagrams of creep. Figure 5 (a) is a graph showing the relationship between the speed of traverse guidance and time; (b) is an explanatory diagram showing the path of the filament on the surface of the winding package. Figure 6 (a) is a graph showing the relationship between the speed of traverse guidance and time; (b) is an explanatory diagram showing the path of the filament on the surface of the winding package. Figure 7 (a) is a graph showing the relationship between the position of the traverse guide and time; (b) is a graph showing the relationship between the speed of the traverse guide and time. Figure 8 (a) is a graph showing the relationship between the acceleration of the traverse guide and time; (b) is a graph showing the relationship between the width of the reversal area and the creep. Figure 9 (a) and (b) are explanatory diagrams showing the path of the filament on the package surface. Fig. 10 (a) is a graph showing the relationship between the position of the traverse guide and time in the modification; (b) is a graph showing the relationship between the speed of the traverse guide and time. FIG. 11 is a graph showing the relationship between the acceleration of traverse guidance and time in the modification shown in FIG. 10.

Tra: 1st reversal time

Trb: 2nd reversal time

Va: the traverse speed of the traverse guide (33) at ordinary times

Vb: Traverse speed of the traverse guide (33) during creep

Wa: 1st width

Wb: 2nd width

Wt: the width of the inversion area in the second inversion control

Claims (7)

A wire winding machine is capable of winding a moving bobbin while being traversed by a traverse guide, and can be wound on a rotating bobbin, and performs precision winding while using it as the rotation speed of the bobbin The winding ratio of the ratio of the number of reciprocating movements per unit time of the traverse guide to the above-mentioned traverse guide is maintained constant, and the package can be formed while forming a package. And the control department; The guide driving part is used to reciprocate the traverse guide in a specific traverse direction, and can change the reverse position of the traverse guide during the winding operation of the wire; The above control unit can execute the first inversion control and the second inversion control; The first reverse control is to control the guide drive unit to decelerate the traverse guide while moving outward at a specific speed in the traverse direction and inward at a specific first reverse position Reverse, and then accelerate to the specified speed above; The second reverse control is to control the guide drive unit to decelerate the traverse guide while moving outward at a specific speed in the traverse direction and to be located inside more than the first reverse position At the second reversal position to reverse inward, and then accelerate to the specific speed above; In the execution of the precision winding, the second reversal time, which is the time from the start of deceleration of the traverse guidance to the completion of reacceleration in the second reverse control, is set to be higher than that of the first In the reverse control, the first reverse time, which is the time from the deceleration of the traverse guidance to the completion of the reacceleration, is longer. The yarn winding machine according to item 1 of the patent application scope, wherein, The control unit is configured such that the longer the distance between the first reversal position and the second reversal position in the traverse direction, the greater the expansion. In the second reversal control, the traverse guide The width of the area moving in the traverse direction within the second reversal time. The yarn winding machine according to item 1 or 2 of the patent application scope, wherein, The control unit is configured to position the traverse guide so as to be positioned in the traverse when half of the second reversal time elapses after the deceleration of the traverse guide is started in the second reverse control The guide driving unit is controlled by the second reverse position in the direction. The yarn winding machine according to any one of the items 1 to 3 of the patent application scope, wherein, Equipped with a bobbin drive unit that rotationally drives the bobbin; The control part has a memory part for storing information about the relationship between the rotation angle of the bobbin and the position of the traverse guide in the traverse direction; The bobbin drive unit and the guide drive unit are controlled based on the information stored in the memory unit. The wire winding machine according to any one of the items 1 to 4 of the patent application scope, wherein, The guide drive unit has a drive source that can be configured to be driven forward and reverse. The yarn winding machine according to item 5 of the patent application scope, wherein, The guide drive unit includes a belt member to which the traverse guide is mounted and is reciprocally driven by the drive source. A wire winding method is to guide the traversing wire while traversing the moving wire and winding it on the rotating bobbin, and perform precision winding while using the rotating speed of the bobbin as described above. The winding ratio of the ratio of the number of reciprocating movements per unit time of the traverse guide is maintained constant, and the yarn winding method capable of forming a package on one side is characterized by performing the first reverse process and the second reverse Transfer process The first reverse process is to decelerate the above traverse guide moving outward at a specific speed in a specific traverse direction, reverse inward at a specific first reverse position, and then accelerate Up to the specific speed mentioned above; The second reverse process is to decelerate the traverse guide that is moving outward at the specific speed in the traverse direction, and the second reverse process is located inside the first reverse position. Turn around at the turn position and then accelerate to the specified speed above; In the execution of the above-mentioned precision winding, the second reversal time, which is the time from the deceleration of the traverse guidance to the completion of the reacceleration in the second reversal process, is set to be higher than the first reversal time. In the reverse process, the first reverse time, which is the time from the start of deceleration of the traverse guide to the completion of reacceleration, is longer.

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