JP2007230708A - Yarn winder and yarn winding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a constitution capable of making both compatible, preventing the lug height of a formed package and preventing collapse of a package shape, in a yarn winder. <P>SOLUTION: The yarn winder is constituted so that a winding bobbin can be set for winding yarn, and is constituted for reciprocatably driving a traverse guide for traversing its yarn when winding the yarn on the winding bobbin, and performs control for changing creeping control for pulsatively changing a traverse width of the traverse guide according to progress of yarn winding in response to a winding progress degree of the yarn to the winding bobbin. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a yarn winding device and a yarn winding method for winding a yarn on a bobbin while traversing the yarn with a traverse guide.

An example of this type of yarn winding method is disclosed in Patent Document 1. In the yarn winding method of Patent Document 1, it is disclosed that creeping control is performed in which the traverse width is changed in a pulsating manner as the yarn winding progresses from the beginning to the end of winding.
JP 2004-196458 A

  However, in the creeping control as described above, there is a possibility that the quality of the package is deteriorated depending on the application and winding conditions. Specifically, when the above control is applied to wind up highly elastic yarn or the like in a cone shape with an automatic winder, the creeping operation has an adverse effect, and when the winding diameter increases, There was a case where the quality of the package was deteriorated due to the occurrence of Kikumaki.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a yarn winding device and a yarn winding method that do not deteriorate the quality of a package while performing creeping control.

Means and effects for solving the problems

  The problems to be solved by the present invention are as described above. Next, means for solving the problems and the effects thereof will be described.

  According to a first aspect of the present invention, a yarn winding device having the following configuration is provided. That is, a winding bobbin for winding the yarn is configured to be set, and the traverse guide is reciprocally driven so that the yarn is traversed when winding the yarn around the winding bobbin. Creeping control means for performing creeping control for changing the traverse width of the traverse guide in a pulsating manner according to yarn winding progress, and by the creeping control means according to the degree of yarn winding on the winding bobbin. And creeping control changing means that makes it possible to change creeping control.

  With this configuration, the optimum creeping control can be selected according to the winding condition.

  The yarn winding device is preferably configured as follows. That is, the creeping control changing means is configured to prohibit creeping control from the start of winding to a specific diameter and start creeping control from the specific diameter. Further, setting means for setting the specific diameter is provided.

  With this configuration, it is possible to easily prevent chrysanthemum winding or the like simply by setting and inputting a creeping start diameter (the specific diameter) according to the winding condition.

  According to the second aspect of the present invention, the following yarn winding method is provided. That is, the yarn is wound around the winding bobbin for winding the yarn while traversing with the traverse guide. Creeping that changes the traverse width of the traverse guide in a pulsating manner according to the yarn winding progress is prohibited from the start of winding to the specific diameter, and starts from the specific diameter.

  By this method, the yarn can be appropriately wound around the winding bobbin while preventing chrysanthemum winding or the like.

  Next, embodiments of the invention will be described. FIG. 1 is a schematic front view and a block diagram showing a yarn winding unit of an automatic winder according to an embodiment of the present invention, and FIG. 2 is a graph showing a control example of the position of a traverse guide by creeping control means of a traverse control unit. is there.

  First, the yarn winding unit (yarn winding device) 2 of the automatic winder 1 will be described with reference to FIG. The yarn winding unit 2 forms a yarn layer by winding a yarn 4 of a yarn supplying bobbin 3 around a winding tube 6 while traversing it with a traverse device 5 to form a predetermined cone-shaped package 7 having a predetermined length. It is. Although only one yarn winding unit 2 is shown in FIG. 1, an automatic winder 1 is configured by arranging a large number of such yarn winding units 2 on a machine base (not shown).

  In this specification, the winding tube 6 and the package 7 are collectively referred to as a winding bobbin. That is, the winding bobbin in which the yarn layer is not formed is the winding tube 6, and the winding bobbin in which the yarn layer is formed is the package 7.

  The yarn winding unit 2 includes a cradle 8 that detachably supports the winding tube 6, and a contact roller 9 that can be driven and rotated on the circumferential surface of the winding tube 6 or on the circumferential surface of the package 7. I have. The cradle 8 is configured such that it can be rotatably supported by sandwiching both ends of the take-up tube 6. Further, the cradle 8 is configured to be tiltable about the swing shaft 10, and the cradle 8 increases the winding thickness (increase in the diameter of the yarn layer) accompanying the winding of the yarn 4 around the winding bobbins 6 and 7. Can be absorbed by swinging.

  A package drive motor (winding bobbin rotation driving device) 41 is attached to a portion of the cradle 8 that sandwiches the winding tube 6. The package driving motor 41 actively drives the winding tube 6 to rotate. The yarn 4 is configured to be wound up. The motor shaft of the package drive motor 41 is connected to the winding tube 6 so as not to rotate relative to the winding tube 6 when the winding tube 6 is gripped by the cradle 8 (so-called direct drive system). The operation of the package drive motor 41 is controlled by a package drive control unit 42, and the package drive control unit 42 is configured to control the operation / stop of the package drive motor 41 in response to a signal from the unit control unit 50. ing.

  A package rotation speed sensor 43 is attached to the cradle 8, and the package rotation speed sensor 43 is formed at the rotation speed of the take-up bobbins 6 and 7 attached to the cradle 8 (formed on the take-up tube 6. The rotational speed of the yarn layer 7) is detected. The rotation speed detection signals of the winding bobbins 6 and 7 are transmitted from the package rotation speed sensor 43 to the package drive control unit 42 and the unit control unit 50. Further, the rotational speed detection signal is also input to a traverse control unit 46 described later.

  Further, a package diameter sensor (diameter sensor) 44 composed of a rotary encoder or the like is attached to the cradle 8, and the package diameter sensor 44 winds the yarn 4 around the take-up tube 6 attached to the cradle 8. The diameter of the formed yarn layer (package 7) can be detected by detecting the swing angle of the cradle 8. The diameter of the yarn layer 7 acquired by the package diameter sensor 44 is transmitted to the unit controller 50 and transferred from the unit controller 50 to the package drive controller 42.

  The unit controller 50 is provided for each yarn winding unit 2, and a host controller 51 is connected to the unit controller 50. The host controller 51 controls the plurality of yarn winding units 2... Arranged in the automatic winder 1 in an integrated manner. The host controller 51 includes a setting device (setting means) 52. By using the setting device 52, for example, the start diameter (specific diameter) of creeping control, the frequency of creeping, and the creeping width can be set. Details of these parameters will be described later.

  The traverse device 5 is provided in the vicinity of the contact roller 9, and the traverse device 5 allows the yarn 4 to be wound around the package 7 while traversing. The traverse device 5 includes a traverse guide (yarn guide) 11 provided so as to be reciprocally movable in the traverse direction, and a traverse guide drive motor 45 that reciprocally drives the traverse guide 11.

  The traverse device 5 is provided with the traverse guide 11 in a hook shape at the tip of an elongated arm member 13 configured to be rotatable around a support shaft, and the arm member 13 is connected to the traverse guide drive motor 45 in FIG. It is configured to be driven to reciprocate as indicated by an arrow. In the present embodiment, the traverse guide drive motor 45 is a voice coil motor.

  The operation of the traverse guide drive motor 45 is controlled by a microcomputer-type traverse control unit 46. The traverse control unit 46 receives a signal from the unit control unit 50 and controls operation / stop of the traverse guide drive motor 45. It is configured to do. The traverse device 5 includes a traverse guide position sensor 47 formed of a rotary encoder or the like, detects the turning position of the arm member 13 (and consequently the position of the traverse guide 11), and sends a position signal to the traverse control unit 46. It is configured to be able to send.

  In this embodiment, as shown in FIG. 1, the package drive motor 41 that drives the take-up tube 6 and the traverse guide drive motor 45 that drives the traverse guide 11 are provided separately, and the take-up bobbin 6 and 7 and the traverse guide 11 are configured to be driven (controlled) separately and independently. Thereby, when winding the yarn 4 around the winding tube 6, various winding methods such as precision winding, step precision winding, random winding and the like can be realized.

  FIG. 2 shows a control example of the traverse guide 11 by the traverse control unit 46 as a graph in which the horizontal axis indicates the position of the traverse guide 11 and the vertical axis indicates time. As shown in FIG. 2, the traverse control unit 46 normally controls the traverse guide 11 to reciprocate so that the maximum traverse width (set traverse stroke) is obtained. The maximum traverse width substantially corresponds to the winding width of the package 7. Further, the inclination angle θ shown in FIG. 2 corresponds to the traverse speed.

  Then, the traverse control unit 46 (creeping control means 71 described later) controls the traverse guide drive motor 45 so as to narrow the traverse stroke of the traverse guide 11 in a pulsating manner every predetermined time period (creeping period). As described above, in the yarn winding unit 2 of the automatic winder 1 according to the present embodiment, so-called creeping control is performed in which the traverse width is changed in a pulsating manner as the yarn winding progresses. And a package 7 having a good shape can be obtained.

  However, the creeping control during the traverse is not always performed in the present embodiment, and the creeping control is performed only when a predetermined condition is satisfied. Details of this control will be described later.

  Next, the yarn joining device 14 and the yarn clearer 15 will be described. That is, the yarn winding unit 2 arranges the yarn joining device 14 and the yarn clearer (yarn monitor) 15 in order from the yarn feeding bobbin 3 side in the yarn traveling path between the yarn feeding bobbin 3 and the contact roller 9. It has a configuration.

  The yarn joining device 14 includes a lower yarn on the yarn feeding bobbin 3 side and an upper yarn on the package 7 side when the yarn clearer 15 detects a yarn defect and performs yarn cutting or when the yarn from the yarn feeding bobbin 3 is broken. And are configured to join the yarns.

  Further, the yarn clearer 15 is for detecting a thickness defect of the yarn 4, and the thickness of the yarn 4 passing through the detecting portion of the yarn clearer 15 is detected by an appropriate sensor, By analyzing the signal with the analyzer 23, a yarn defect such as a slab is detected. The yarn clearer 15 is provided with a cutter 16 for cutting the yarn 4 immediately when a yarn defect is detected.

  On the lower side and the upper side of the yarn joining device 14, a lower yarn catching guide means 17 for sucking and catching and guiding the lower yarn on the yarn feeding bobbin 3 side, and an upper yarn for sucking and catching and guiding the upper yarn on the package 7 side. A capture guide means 20 is provided. The upper thread catching and guiding means 20 is configured in a pipe shape, and is provided so as to be rotatable up and down around a shaft 21, and a mouse 22 is provided on the tip side thereof. Similarly, the lower thread catching and guiding means 17 is also configured in a pipe shape, and is provided so as to be rotatable up and down around a shaft 18, and a suction port 19 is provided at the tip side thereof. An appropriate negative pressure source is connected to the upper thread catching and guiding means 20 and the lower thread catching and guiding means 17 so as to cause the mouse 22 and the suction port 19 at the tip to generate a suction action.

  As described above, the automatic winder 1 according to the present embodiment is configured. In this configuration, the control device 63 includes at least the host controller 51 (setting device 52), the unit controller 50, and the traverse controller 46. It is configured.

  Next, the control of the unit controller 50 and the traverse controller 46 in the automatic winder 1 will be described with reference to FIG. FIG. 3 is a flowchart showing creeping control.

  In the present embodiment, the traverse control unit 46 shown in FIG. 1 is configured as a microcomputer, and includes a CPU as a calculation means (not shown), a ROM, a RAM, etc. as storage means. Similarly, the unit controller 50 includes a CPU, a ROM, a RAM, etc. (not shown).

  The ROM of the traverse control unit 46 stores control software for operating hardware such as a CPU included in the traverse control unit 46 as the creeping control means 71.

  The ROM of the unit control unit 50 stores control software for operating hardware such as a CPU included in the unit control unit 50 as the creeping control change unit 54.

  Here, the setting device 52 provided in the host controller 51 is configured so that the frequency of creeping operation when the yarn 4 is wound, the creeping width, the creeping start diameter, and the like can be set. The unit controller 50 of each yarn winding unit 2 receives the setting information from the host controller 51.

  Hereinafter, the flow of FIG. 3 will be described. First, the unit control unit 50 sets a new empty winding tube 6 in the cradle 8 by a doffing device (not shown), and transfers the yarn 4 from the yarn feeding bobbin 3 to the winding tube. 6 starts winding (S101).

  After starting winding, the unit controller 50 acquires the current package diameter (current diameter) from the package diameter sensor 44 (S102). In step S103, the current package diameter is compared with a preset creeping start diameter (specific diameter).

  In S103, when the current package diameter is smaller than the preset creeping start diameter (specific diameter), the unit controller 50 sends a signal to the traverse controller 46. The creeping control means 71 of the traverse control unit 46 that has received this signal controls to perform traverse without creeping control. At the same time, the package drive control unit 42 continues the winding (S105). On the other hand, if the acquired current diameter is greater than or equal to the specific diameter, the unit control unit 50 sends a signal to the traverse control unit 46 to perform creeping control that pulsatically narrows the traverse stroke by a predetermined width. The winding is continued (S105) while performing the process according to 71 (S104).

  Thereafter, the unit controller 50 determines whether or not the current diameter acquired from the package diameter sensor 44 has reached a predetermined full winding diameter, that is, whether or not the end of winding has been reached (S106). When the package 7 becomes full, the doffing operation, that is, the operation of removing the full package from the cradle 8 is performed by a doffing device (not shown) (S107). Thereafter, the process returns to S101, and a new empty winding tube 6 is attached to the cradle 8, and winding is resumed.

  If it is determined in S106 that the winding end has not yet been reached, the process returns to S102. That is, the processing of S102 to S106 is continuously repeated in the control device 63 from the start of winding of the yarn 4 to the end of winding.

  The creeping control changing means 54 is realized by the flow of FIG. By the control of the creeping control changing means 54, the yarn 4 is wound without performing creeping control at the initial stage when the yarn 4 is wound around the winding bobbins 6 and 7, and the advancement degree of the winding is determined in advance. When the degree is reached (when the current diameter reaches the specific diameter), the yarn 4 is wound up while performing creeping control based on the parameters of the creeping frequency and creeping width. That is, at the beginning of winding, the yarn layer 7 is formed so that the end portion has a high yarn density without using creeping, and after the specific diameter is reached, the package 7 becomes an ear-high shape. Creeping control is performed to prevent this.

  By performing this control, the quality of the package 7 can be kept good. That is, for example, in the case of winding a highly stretchable yarn in a cone shape, if creeping control is performed from the beginning of winding the yarn 4 onto the empty winding tube 6, the tension during winding or the package Due to the contact pressure of the contact roller 9 with respect to 7 and the change in winding density due to the twill angle, there is a risk that the end of the small diameter side of the yarn layer 7 will collapse into a chrysanthemum shape due to the above density change when winding has progressed to some extent. is there. In this regard, according to the control of the present embodiment, the creeping control is started after the winding has progressed to some extent and reaches a specific diameter, so that the density of the yarn layer 7 can be increased at the beginning of winding, and the winding can be performed firmly. It is possible to avoid the above-described problem of package deformation.

  As described above, the yarn winding unit 2 of the automatic winder 1 according to this embodiment is configured so that the winding tube 6 for winding the yarn 4 can be set, and winding the yarn around the winding tube 6. At this time, the traverse guide 11 is driven to reciprocate so that the yarn 4 is traversed. The yarn winding unit 2 includes creeping control means 71 for performing creeping control for changing the traverse width of the traverse guide 11 in a pulsating manner as the yarn winding proceeds, and winding the yarn 4 on the winding bobbins 6 and 7. Creeping control changing means 54 that enables the creeping control by the creeping control means 71 to be changed in accordance with the degree of advancement.

  Therefore, the optimal creeping control is performed according to the winding conditions from the beginning of winding to the end of winding of the shape of the package 7 (especially cone-shaped package) wound around the winding bobbins 6 and 7 and the density of the yarn layer. Can be selected and controlled. Therefore, it is possible to prevent deterioration of the package quality such as generation of chrysanthemum while sufficiently preventing the ear height.

  Further, the creeping control changing means 54 is configured to prohibit creeping control from the start of winding to a specific diameter, and start creeping control from the specific diameter. And the setting device 52 which sets the said specific diameter is provided. Therefore, by just setting and inputting the creeping start diameter (said specific diameter) from the setting device 52 in accordance with the winding conditions, it is possible to easily prevent a chrysanthemum winding.

  Further, in the yarn winding unit 2 of the present embodiment, creeping that changes the traverse width of the traverse guide 11 in a pulsating manner according to the yarn winding progress is prohibited from the winding start to the specific diameter, and is started from the specific diameter. The yarn is being wound on. Thereby, the thread | yarn 4 can be appropriately wound around the winding bobbins 6 and 7, preventing a chrysanthemum winding etc.

Instead of simply switching the presence / absence of creeping based on the comparison result with a single specific diameter as in S103 and S104 of the flow of FIG. 3, control as shown in FIG. 4 can be performed. it can. That is, creeping is not performed at the beginning of winding (when the current diameter is less than the first specific diameter r ₁ ), and creeping is performed when the current diameter exceeds the first specific diameter r ₁ and is equal to or less than the second specific diameter r _2. Creeping is performed at a rate x ₁ and a creeping width w ₁ , and creeping is performed at a creeping rate x ₂ and a creeping width w ₂ when the current diameter is greater than the second specific diameter r ₂ and below the third specific diameter r _3. It is possible to control so that creeping is performed with the creeping rate x ₃ and the creeping width w ₃ from the current diameter exceeding the third specific diameter r ₃ to the end of the winding.

  These control parameters can be set in advance by the setting device 52, and stored in the RAM of the unit controller 50 in a table format as shown in FIG. 4, for example, based on a signal from the host controller 51. . Note that the creeping rate is defined as t1 / when the traverse guide 11 is driven with a stroke width narrower than usual (creeping time) in FIG. 2 and t1 is the creeping cycle. This is the value of t2. This creeping rate is substantially synonymous with the frequency of creeping. Further, the creeping width means how much the traverse guide 11 can be narrowed from the normal traverse stroke at the maximum during the creeping operation.

  In this modification, as shown in FIG. 4, control is performed to change the degree of creeping (creeping rate, creeping width) in accordance with the progress of winding of the yarn around the bobbin. . Therefore, the package shape and the density of the yarn layer 7 can be controlled with higher accuracy than in the case where the presence or absence of the creeping operation is simply switched as shown in FIG.

  Further, the change of the creeping degree is performed by changing the creeping frequency (creeping rate) and the creeping width. Therefore, the package shape and the density of the yarn layer 7 can be controlled with a simple configuration.

In the above modification, a plurality of creeping control levels can be set according to the progress of winding the yarn 4 onto the winding bobbins 6 and 7 (in FIG. 4, the first specific diameter r is set). ₁ third three specific diameter r ₃ ~). Therefore, it is possible to control the fine package shape and the yarn layer density in accordance with the yarn type, winding condition, etc. at each of a plurality of stages, thereby contributing to further improvement of the package quality.

  The configuration disclosed above is an example, and can be changed as follows, for example.

In FIG. 4, the control for changing the presence / absence of the creeping operation and the control for changing the degree of creeping are combined and controlled. However, only the degree of creeping may be changed. For example, the winding start to the first particular diameter r ₁ is smaller creeping rate and creeping width increases the creeping rate and creeping width if the first particular diameter r ₁ or more, continues it until the winding end Like.

  In FIG. 4, the change of the creeping degree is realized by changing both the creeping rate and the creeping width. However, only the creeping rate or only the creeping width may be changed. .

  For example, instead of acquiring the package diameter from the package diameter sensor 44, the accumulated winding length from the start of winding of the yarn 4, It is possible to obtain from the elapsed time.

  The creeping start diameter, the frequency of creeping, the creeping width, etc., instead of being set by the setting device 52 provided in the host controller 51, for example, each thread winding unit 2, 2,. Etc. may be provided as setting means, and the creeping start diameter and the degree of creeping may be set by operating the setting means.

  The traverse device 5 is configured so that the arm member 13 is reciprocally driven by a traverse guide drive motor 45 configured as a voice coil motor, as shown in a yarn winding unit 2 ′ of a modified example of FIG. An endless timing belt 31 is disposed in the vicinity, a traverse guide 11 'is attached to the timing belt 31, and the timing belt 31 is reciprocated by, for example, a traverse guide drive motor 45' as a pulse motor. be able to. In addition, it is possible to change to a traverse device having another configuration, such as a configuration in which a cam groove is provided obliquely on the outer peripheral surface of the drum-shaped traverse cam and a traverse guide is engaged with the cam groove.

  The diameter signal detected by the package diameter sensor 44 can be changed to a configuration that is directly input to the traverse control unit 46 instead of the configuration that is transferred to the traverse control unit 46 via the unit control unit 50.

  The control shown in S103 to S105 of FIG. 3 can be configured to be performed by the traverse control unit 46, for example, instead of being performed by the unit control unit 50.

  The control device 63 includes a package diameter sensor 44 that detects the diameter of the yarn layer 7 formed by winding the yarn around the winding tube 6. The advancement degree of winding of the yarn 4 around the take-up tube 6 is recognized. However, the present invention is not limited to this. For example, the winding progress may be recognized by measuring the winding time from the start of winding.

  In this embodiment, the case where the yarn 4 is wound around the cone-shaped winding tube 6 to form the cone-shaped package 7 is shown, but the yarn winding unit 2 is of a type in which the yarn is wound around the cheese-shaped winding tube. Can be changed. However, the control by the creeping control changing means 54 of the present embodiment is particularly suitable when manufacturing a cone-shaped package.

The schematic front view and block diagram which show the thread winding unit of the automatic winder which concerns on one Embodiment of this invention. The graph figure which shows the example of control of the position of the traverse guide by the creeping control means of a traverse control part. The flowchart figure which shows creeping control. The figure which shows the control table used in the other example of creeping control. The schematic front view and block diagram which show the modification of a traverse apparatus.

Explanation of symbols

1 Automatic winder 2 Yarn winding unit (yarn winding device)
3 Yarn feeding bobbin 4 Yarn 6 Winding tube (empty winding bobbin)
7 Package (winding bobbin with thread layer)
DESCRIPTION OF SYMBOLS 11 Traverse guide 14 Yarn splicing device 41 Package drive motor 42 Package drive control part 44 Package diameter sensor (diameter sensor)
45 Traverse drive motor 46 Traverse controller 50 Unit controller 51 Host controller 52 Setter (setting means)
54 Creeping control change means 63 Control device 71 Creeping control means

Claims (3)

In a yarn winding device configured to enable setting of a winding bobbin for winding a yarn and reciprocally driving a traverse guide so that the yarn is traversed when winding the yarn around the winding bobbin,
Creeping control means for performing creeping control to change the traverse width of the traverse guide in a pulsating manner according to yarn winding progress;
A creeping control changing means that makes it possible to change the creeping control by the creeping control means in accordance with the degree of progress of winding the yarn onto the winding bobbin;
A yarn winding device comprising: The yarn winding device according to claim 1,
The creeping control changing means is configured to prohibit creeping control from the start of winding to a specific diameter and start creeping control from the specific diameter,
A yarn winding device comprising setting means for setting the specific diameter. In a yarn winding method for winding a yarn while traversing it with a traverse guide to a winding bobbin for winding the yarn,
A yarn winding method characterized in that creeping that changes the traverse width of the traverse guide in a pulsating manner as the yarn winding progresses is prohibited from the start of winding to a specific diameter and is started from the specific diameter.

Images