JP3634529B2 - Automatic switching type winder - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an automatic switching type yarn winding machine that alternately switches two bobbin holders to continuously wind the yarn, and more specifically, using a bobbin provided with a slit at the end, when switching the bobbin, The present invention relates to an automatic switching type yarn winding machine in which a yarn is captured in the slit to form a bunch winding and a pigtail.
[0002]
[Prior art]
In recent years, in the production process of synthetic fiber yarns, production methods for continuously winding bobbins automatically and continuously winding yarns that are continuously produced using an automatic switching type yarn winding machine have been actively performed. It has become. This automatic switching type yarn winding machine includes two bobbin holders for forming a yarn package on a known turret table, and a bobbin in which an empty bobbin and a yarn package are formed by rotating the turret table And turret type yarn winding machines are used frequently, in which the yarns are automatically and alternately switched to continuously wind the yarn.
[0003]
This turret type yarn winding machine is provided with a bunch winding forming mechanism as disclosed in Japanese Patent Application Laid-Open No. 57-85764, etc., in order to achieve the automatic switching which is a feature of the turret type yarn winding machine, and forms a pigtail as follows. Like to do. That is, a bobbin having a slit is mounted on a bobbin holder, and when the package on the bobbin on the winding side is completely wound, the turret is started, and then the yarn removing guide provided upstream from the traverse guide is used for the yarn. Then, the bunch guide slides forward to guide the yarn to the slit position on the empty bobbin side, and the slit of the empty bobbin that has been raised and the yarn are brought into contact with each other, and the thread is captured by the slit of the empty bobbin. After a bunch winding is formed on it for a certain time set by the timer that starts at the start of the turret, the bunch guide moves backward to the original steady winding position while forming a pigtail, and the yarn is handed over to the traverse guide. The bunch winding and the pigtail are formed so as to start the steady winding on the bobbin.
[0004]
In such a turret operation, when the yarn is switched, the traveling direction of the yarn and the peripheral speed direction of the empty bobbin are reversed, so that momentary tension relaxation occurs on the yarn when the yarn is captured in the slit. In some cases, the single yarn of the yarn is scattered, and the influence extends to the pigtail used as a product, and the package is downgraded. For this reason, a method may be employed in which the amount of bunch windings removed in the selection step is increased to increase tension during formation of the bunch windings to prevent the single tail yarn from being separated in the pigtail portion.
[0005]
On the other hand, in recent years, the removal of bunch winding in the sorting process and the stripping process of the tension fluctuation part of the package surface layer have been automated due to the rationalization of production, but the amount of bunch winding of the package is too much at this automatic processing. In particular, in the case of thick denier yarns, the bunch winding may have fallen from the bobbin, which is taken up by the suction of the automatic sorter, and the phenomenon that the pig bunch and pigtail are peeled off also occurs.
[0006]
As mentioned above, the amount of bunch winding affects the product rating, but the time from the start of the turret to the time when the yarn contacts the empty bobbin is different when switching the small volume and when switching the complete volume. On the other hand, the bunch winding timer has a fixed time from the start of the turret to the end of the bunch winding. It was difficult to solve the conflicting problems.
[0007]
[Problems to be solved by the invention]
An object of the present invention is to solve the pig defect problem by forming a constant bunch amount regardless of the winding diameter of the yarn package at the time of switching.
[0008]
[Means for Solving the Problems]
That is, according to the present invention, two bobbin holders that are alternately switched between the winding side and the standby side are equipped with a bobbin provided with a slit for capturing the yarn at the end, and the switching is performed. , In automatic switching type yarn winding machine that captures yarn in empty bobbin slit to form bunch winding and pigtail, it starts at a certain timing after switching starts and bunch winding end signal at set time And a bunch winding time setting means for automatically setting a bunch winding time according to the winding diameter of the yarn package at the time of switching so that the bunch winding amount becomes a predetermined amount during the set time of the timer It is an automatic change-type yarn winding machine characterized by comprising.
[0009]
As described above, the bunch winding time setting means of the present invention is configured to set the bunch winding time according to the winding diameter of the yarn package, so that the automatic switching type yarn winding machine of the present invention can be used to set the yarn. Regardless of the winding diameter of the strip package, a certain amount of bunch winding can always be formed stably, the occurrence of package downgraded products due to the bunch winding amount can be prevented, and the above problem can be solved.
[0010]
In the present invention, the bunch winding time setting means obtains the winding diameter of the yarn package from the winding time from the start of winding, obtains the bunch winding time based on the winding diameter, and sets this time. This is preferable in that all processing can be performed by the above-described arithmetic unit and it is not necessary to provide a new detector.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, details of the present invention will be described based on embodiments with reference to the drawings. FIG. 1 is a schematic perspective view of a spindle drive type turret type yarn winding machine according to an embodiment. FIG. 2 is an explanatory diagram of timer values of the bunch winding time setting means of the embodiment. FIG. 3 is an explanatory diagram of the turret operation of the embodiment.
[0012]
1 and 3, reference numerals 1 and 2 denote bobbin holders, which are supported by the turret table 3 in the horizontal direction. The center of the turret table 3 is rotatably supported by a support shaft (not shown). The turret table 3 is rotated around the support shaft by a turret motor 10 to move the bobbin holders 1 and 2 to a standby position and a winding position. It is made to switch alternately. The bobbin holders 1 and 2 are individually driven by spindle motors 4 and 5 provided on the back side of the turret table 3. In this example, as shown in the figure, four bobbins are simultaneously mounted on each of the bobbin holders 1 and 2, and the four yarns can be wound up simultaneously.
[0013]
A contact roller 6 is provided above the bobbin holders 1 and 2 at the winding position. The contact roller 6 contacts and presses the surface of the yarn package formed on the bobbin holders 1 and 2 at a predetermined contact pressure at the time of winding the yarn, and simultaneously rotates with the yarn package to detect the winding speed. Also plays a role.
[0014]
The contact roller 6 has a thread removal mechanism having the same configuration as that of the yarn shifting mechanism for guiding the yarn to the slit of the bobbin for bunch winding disclosed in the above-mentioned Japanese Patent Application Laid-Open No. 57-85764. A yarn feeding mechanism including a guide 9 and a yarn guide 11 is provided. 7 is a traverse box that traverses the traveling yarn to be wound, and a traverse guide (not shown) that reciprocates between a predetermined width and traverses the yarn. A traverse cam roller 8 provided with a cam groove to be driven is housed. A yarn removal guide plate 9 is provided in the vicinity of the upper portion of the traverse guide to push the yarn from the traverse guide provided so as to swing toward the contact roller 6 toward the contact roller 6 and to remove it. A yarn shifting guide plate 11 for moving the yarn to the slit position of the bobbin 12 is installed on the front surface in the pushing direction, and the traveling yarn removed from the traverse guide by the yarn removing guide plate 9 is used as the yarn shifting guide. Is guided to the slit of each bobbin 12 in the formation of the bunch winding.
[0015]
Switching of the bobbin of this turret type yarn winding machine is performed as follows. As shown in FIG. 3, the yarn Y which is melt-spun and continuously supplied at a constant speed is wound around a bobbin 12 mounted on the bobbin holder 1 shown in the figure while traversing with a traverse guide (not shown). The yarn package P is formed. The contact roller 6 controls the contact pressure application and the winding speed during winding.
[0016]
When the preset predetermined amount of winding is completed, the bobbin switching is started. First, the peripheral speed control by the contact roller 6 is interrupted, and the bobbin holder 1 on the complete winding side is accelerated within a few seconds to a predetermined speed. On the other hand, prior to the speed increase of the bobbin holder 1 on the complete winding side, the bobbin holder 2 shown in the figure on the empty bobbin side is started to drive and is stably rotated at the winding speed at the start of switching.
[0017]
Further, after the ascending speed of the bobbin holder 2 on the empty bobbin side is completed, the turret table 3 is unfixed and starts to rotate. As shown in FIG. 3, the yarn package P formed on the bobbin holder 1 by this rotation is separated from the contact roller 6, and the bobbin holder 2 with an empty bobbin (not shown in FIG. 3) is wound up. As the position approaches, the positions of the two bobbin holders 1 and 2 are gradually switched.
[0018]
At this time, the yarn Y is guided to the slit position of the empty bobbin as follows until the yarn Y contacts the empty bobbin of the illustrated bobbin holder 2. That is, the yarn removal guide plate 9 removes the yarn Y from the traverse guide (not shown) by the fluid pressure cylinder (not shown) of the driving means and delivers it to the yarn guide 11. The yarn guide 11 is driven by sliding the yarn Y to the slit position of each empty bobbin by a fluid pressure cylinder (not shown) of the driving means and holding it at the slit position.
[0019]
Therefore, when the turret is rotated to a position where the empty bobbin of the bobbin holder 2 comes into contact with the traveling yarn Y, the yarn Y comes into contact with and catches the slit of the empty bobbin and is located at or near the slit. Bunch winding starts. And the conventional setting means of this bunch winding amount is comprised as follows. That is, a certain timing after the start of switching, specifically, a limit switch (not shown) attached to the machine base so that the turret table 3 operates at a position rotated by a predetermined angle from the winding position, and this triggers It is composed of a sequence timer (hereinafter referred to as a bunch timer) that sets the bunch winding time, and when the timer setting value preset in the bunch timer is reached, a bunch winding end signal is output from the bunch timer. Thus, the yarn gathering guide 11 and then the yarn removing guide 9 are moved back to their original positions, the yarn Y is handed over to the traverse guide to complete the formation of the bunch winding and the pigtail, and the normal traverse range on the empty bobbin is reached. Steady winding is started. Therefore, the bunch winding amount formed by this is the winding amount from the time when the yarn Y is captured in the slit of the empty bobbin to the time-up of the bunch timer. There is no problem if the setting value of the bunch timer is constant. However, the timing at which the yarn Y comes into contact with the slit of the empty bobbin and is captured is as shown in FIG. 3 when the yarn is formed on the winding-side bobbin holder 1 that descends as the turret table 3 rotates. Specifically, depending on the amount of winding of the strip package P, the yarn guide of the yarn Y is different as shown in the complete winding P1 and the small winding P2 in the figure and changes greatly. Therefore, since the actual bunch winding time and the bunch winding amount vary depending on the diameter of the yarn package P on the winding side at the time of switching, if the bunch timer value is constant, the small winding switching and complete winding switching As a result, the amount of bunch winding was different, and the above-mentioned problem occurred.
[0020]
On the other hand, in this example, the other configurations are the same as those in the conventional example, and the bunch timer is replaced with the conventional example, and the following timer and bunch winding time setting means are used. That is, by using a control computer (not shown) of the winder, a soft bunch timer that can automatically set a set time by software instead of a conventional bunch timer in the control computer, and a set time of the soft bunch timer The bunch winding time setting means for obtaining the bunch winding time corresponding to the winding diameter of the yarn package, that is, the outer diameter by the following calculation and automatically setting this is provided, and a bunch winding end signal from the soft bunch timer is provided. As in the conventional example, the bunch winding is finished, and a transition is made to steady winding.
[0021]
The winding time T is measured by a winding time measuring counter of software provided in the control computer from the start of steady winding after switching. Then, when the turret is started, the winding diameter D (mm) is obtained from the winding time T (min) by the following formula.
[0022]
[Expression 2]
D = {(4000 · q · T) / (π · d · s) + Do ² } ^1/2
[0023]
In the above equation, q is the discharge amount (g / min), d is the winding density (g / cm ³ ), s is the winding width (mm), and Do is the outer diameter (mm) of the bobbin. The discharge amount q, the winding density d, and the winding width s are stored in advance in the storage device of the control computer as files for each brand.
Based on the obtained winding diameter D, a set value V (second) of the bunch timer is obtained by the following equation.
[0024]
[Equation 3]
V = Ts− (D−Do) × (Ts−Tm) / (Dm−Do)
[0025]
In the above equation, Ts is a timer setting value (second) at the minimum winding diameter, Tm is a timer setting value (second) at the maximum winding diameter, and Dm is a maximum winding diameter (mm). The maximum winding diameter Dm uses the design value of the winder, and the timer setting values Ts and Tm at the minimum winding diameter are registered in advance and stored in the file for each brand together with the various quantities.
[0026]
The obtained set value V is set in a soft bunch timer provided in the control computer. The soft bunch timer is activated by operating the limit switch, and outputs a bunch winding end signal when a set time elapses. With this signal, the yarn guide 11 and the yarn removal guide plate 9 are sequentially operated in the same manner as in the conventional example, so that the formation of the bunch winding and the pigtail is completed, and the regular winding is started.
[0027]
Therefore, when the complete winding is switched quickly when the yarn Y contacts the empty bobbin early and the bunch formation starts quickly, the timer setting time is reduced, and the yarn Y contacts the empty bobbin late so that the bunch formation starts. Since the timer setting time can be increased at the time of slow small winding switching, a stable predetermined bunch amount can be formed regardless of the winding amount of the yarn package P on the winding side, and the bunch amount is small. This makes it possible to avoid problems with pigs that occur due to too much, and troubles in the post-process that occur because the amount of bunches is too large.
[0028]
【The invention's effect】
According to the present invention, since a stable bunch amount can be formed regardless of the winding amount of the package on the winding side, the single yarn looseness caused by the drop in tension generated in the switching operation because the bunch amount is too small. The effect of damage cannot be absorbed by the pig bunch part, and the package is prevented from being downgraded to the pig tail part used as a product, and the bunch winding thread falls from the end surface of the bobbin because the bunch amount is too large. The automatic yarn end processing device in the sorting process step in the subsequent process after winding can prevent the trouble that the suction is mistakenly sucked and peeled off to the pigtail. As described above, the present invention greatly contributes to stabilization of production in the fiber production process and further to improvement of productivity.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view of an automatic switching type yarn winding machine according to an embodiment of the present invention.
FIG. 2 is an explanatory diagram of a timer value of a bunch winding time setting unit according to the embodiment.
FIG. 3 is an explanatory diagram of a turret operation according to the embodiment.
[Explanation of symbols]
1, 2 Bobbin holder 3 Turret table 6 Contact roller 9 Thread removal guide plate 11 Thread guide

Claims (2)

A bobbin with a slit at the end is attached to two bobbin holders that are switched alternately between the winding side and the standby side. In the automatic switching type yarn winding machine that captures the yarn to form a bunch winding and a pigtail, a timer that is started at a certain timing after the start of switching and outputs a bunch winding end signal at a set time, Bunch winding time setting means for automatically setting the bunch winding time according to the winding diameter of the yarn package at the time of switching so that the bunch winding amount becomes a predetermined fixed amount during the set time of the timer is provided. Automatic switching type winder. The automatic switching type yarn winding machine according to claim 1, wherein the bunch winding time V is obtained by the following equation.

(In the above equation, Ts is the timer setting value at the minimum winding diameter (seconds), Tm is the timer setting value at the maximum winding diameter (seconds), Do is the bobbin outer diameter (mm), D is the yarn at the time of switching (The package winding diameter (mm), Dm is the maximum winding diameter (mm).)

Images