Winder for synthetic fibers

Abstract

To provide a thread winding bobbin that enables thread switching with a high success rate for winding thread and excellent workability and productivity for a winder for synthetic fibers.SOLUTION: A winder for synthetic fibers comprises a plurality of thread holding portions 16 equipped with a hook portion of a hook-and-loop fastener on the peripheral surface of one end of a thread winding bobbin 15.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a winding device for synthetic fibers that improves the success rate of yarn winding when switching yarns.

Background Art

[0002] A bobbin for winding yarn in a winding device for synthetic fibers is for winding and holding a yarn strand sent out from a spinning process. Generally, many are made of paper, which is commonly called a paper tube, and others include those made of wood, metal, synthetic resin, etc. The winding method is to grip the spun yarn strand with a yarn gripping portion provided on the circumferential surface of the bobbin and wind it starting from there. Until the yarn strand is gripped and wound at this yarn gripping portion, the yarn strand that cannot be wound has to be discarded. Also, if the yarn gripping fails due to low yarn gripping property, yarn breakage occurs, which directly leads to a decrease in productivity. Therefore, it is required not only to eliminate bobbins that cannot be gripped but also to be able to grip them in a short time.

[0003] Furthermore, with the development of synthetic fiber manufacturing technology, it has become possible to spin a variety of yarns, such as core-sheath composite monofilaments and multi-filaments with fine single-filament fineness, at higher speeds according to the application. Therefore, shortening the above-mentioned gripping time and ensuring gripping have become more significant.

[0004] As conventional yarn gripping methods, there are methods of introducing a yarn strand that runs in a yarn gripping groove provided on the circumferential surface of a bobbin for winding yarn to grip the yarn strand, and methods of gripping the yarn strand with claw-like protrusions outside the yarn winding range of the bobbin and winding it onto the bobbin. As conventional examples regarding the yarn gripping portion in such a winding device for synthetic fibers, those described in Patent Document 1, Patent Document 2, Patent Document 3, etc. are known.

[0005] Patent Document 1 proposes a method in which a male fastener is wound around a paper layer near the surface layer in a paper tube parallel to the paper layer, an opening is formed with a narrow width on the outer peripheral surface near the end of the paper tube, and a thread gripping groove is formed linearly or serratedly in the opening and passing through the male fastener, and a thread is gripped in the thread gripping groove.

[0006] Patent Document 2 proposes a method in which a thread running in a thread gripping groove on the circumference of a rotating bobbin for winding is gripped, and the thread is cut by tension due to rotation to start winding.

[0007] Patent Document 3 proposes a method in an automatic switching device of a turret type thread winding machine for winding a high-tension and thick monofilament with a large thread diameter, in which a catch ring having a plurality of claw portions for hanging a thread, the thread hung on the claw portion is sandwiched and gripped by the catch ring and a flange ring, and the thread is cut by a fixed blade at a position close to the flange ring.

Prior Art Documents

Patent Documents

[0008]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0009] However, the yarn gripping method described in Patent Document 1 is a method of inserting and gripping a yarn into a narrower yarn gripping groove engraved in a narrow opening on the outer peripheral surface near the end of a paper tube. Without accurately inserting the yarn into the yarn gripping groove and even to the depth of the bottom of the yarn gripping groove, good yarn winding property cannot be obtained. Also, due to dirt, deformation of the yarn gripping groove, etc., the yarn gripping property deteriorates, and it is necessary to appropriately replace it with a new paper tube or bobbin. As described above, while shortening the gripping time and ensuring the certainty of gripping are required, an increase in the replacement frequency of the paper tube is expected to increase the production cost of a new paper tube or bobbin, deteriorating both productivity and economy.

[0010] Also, in the winding method described in Patent Document 2, as a yarn gripping part of a paper tube or a bobbin, a yarn gripping groove for pressing and inserting a yarn is assumed. Similar to the concerns in Patent Document 1, to obtain high yarn winding property, it is necessary to accurately insert the yarn into the yarn gripping groove, and it is also necessary to appropriately perform replacement due to deterioration of the yarn gripping groove.

[0011] Furthermore, in Patent Document 3, an automatic switching device for a turret type yarn winding machine in which two bobbin holders are rotatably attached to a rotatable turret has been proposed. As a yarn gripping part of the automatic switching device, it includes a catch ring having a plurality of claws for hanging the yarn, and a flange ring for sandwiching and gripping the yarn hung on the claws with the catch ring. However, in order to accurately insert the yarn into the gap between the catch ring and the flange ring and enhance the gripping property, it is necessary to adjust the size of the gap according to the yarn diameter to be wound. Moreover, since the size of the gap fluctuates during repeated use, the time and labor required for maintenance work increase. As described above, in the situation where spinning can be performed under faster conditions, these conventional yarn gripping methods have a narrow gap in the yarn gripping part. To insert and grip the yarn, high-precision yarn path regulation must be carried out to exhibit high yarn winding property. Also, in order to cope with a variety of yarns, it is necessary to appropriately adjust the size of the gap in the yarn gripping part, etc., increasing the time and labor required for maintenance work on the yarn gripping part.

[0012] Especially in the case of holding a monofilament thread, compared with a multifilament where a single thread becomes multiple threads, the friction on the thread surface is small. When the thread enters and is sandwiched in the gap of the thread holding part, there is a high possibility of slipping out without being able to hold it. Therefore, it is necessary to carefully select the shape of the thread holding part. In order to improve the drawbacks of such conventional thread holding methods, develop a thread holding part for a bobbin for winding yarn that is excellent in holding various synthetic fiber threads, and is easy to replace and maintain, thus requiring good workability, productivity, and economy.

[0013] The present invention aims to solve the problems in the above-mentioned prior art, and provides a winding device for synthetic fibers using a bobbin for winding synthetic fibers that enables thread switching with a good thread hanging success rate, is easy to maintain the thread holding part, and is excellent in economy.

Means for Solving the Problem

[0014] To solve the above problems, the synthetic fiber winding device of the present invention has the following configuration. (1) In a synthetic fiber winding device, a plurality of thread holding parts provided on a bobbin for winding yarn are equally arranged on the circumferential surface of one end of the bobbin for winding yarn, and the thread holding part includes a hook part of a hook-and-loop fastener. (2) The size of the thread holding part is characterized by a length of 5.0 to 10.0% with respect to the width on the rotation axis of the bobbin for winding yarn, and a length of 5.0 to 11.0% with respect to the circumferential length of the bobbin for winding yarn. The synthetic fiber winding device according to (1) above. (3) The shear strength of the hook part of the hook-and-loop fastener when a tensile stress is applied in a state of being adhered to the loop part is 4.0 to 8.0 N / cm 2 , and the peel strength is 0.6 to 1.0 N / cm. The synthetic fiber winding device according to (1) or (2) above. (4) The hook part of the hook-and-loop fastener has two types of hook parts with different hook heights. One hook height is 20 to 30 times the yarn diameter of the yarn to be wound, and the other hook height is 10 to 15 times the yarn diameter of the yarn to be wound. The synthetic fiber winding device according to any one of (1) to (3) above. (5) The two types of hook parts of the surface fastener are paired such that the tip parts of the hooks face each other, and a pair adjacent to each other in the front, rear, left, and right directions are equally arranged at an interval of 1.0 to 1.5 mm. The synthetic fiber winding device according to (4) above is characterized in this.

Effect of the Invention

[0015] The present invention aims to solve the problems in the above-described prior art, enables thread switching with a good thread hanging success rate, facilitates maintenance of the thread gripping part, and provides a synthetic fiber winding device using a synthetic fiber bobbin for winding that is excellent in both productivity and economy and has excellent economy.

Brief Explanation of Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Mode for Carrying Out the Invention

[0017] Hereinafter, the synthetic fiber winding device of the present invention will be described with reference to the drawings. FIG. 1 shows a general multi-thread spinning process, for example, an 8-thread spinning process. The running yarns 1 of 8 threads spun from 8 spinnerets (not shown) pass through the spinning duct 2, and then an oiling agent is applied by the oiling device 3 provided for each of them, and after sequentially passing through the respective tension adjusting rollers (4, 5), they are wound by the winding device 6.

[0018] FIG. 2 is a schematic diagram showing the operation when threading the yarn to the winding device 6, and FIG. 3 is a schematic diagram when the yarn 1 enters and is gripped by the yarn gripping portion 16 provided on the bobbin for winding 15 before the start of winding. The running yarn 1 is traversed by the traversing device 10 with the twill vibration fulcrum guide 7 as a fulcrum, and is wound around the bobbin for winding 15 attached to the spindle 12 driven by the surface pressure roller 11. A plurality of yarn gripping portions 16 are equally arranged on the peripheral surface of one end portion of the bobbin outside the twill vibration region of the bobbin for winding 15. After gripping the starting yarn with the yarn gripping portion 16, it is traversed and wound by the traversing device 10. A yarn guiding guide 9 for guiding the starting yarn to the yarn gripping portion 16 is installed at a position corresponding to the yarn gripping portion 16 in a direction substantially perpendicular to the yarn gripping portion between the traversing device 10 and the twill vibration fulcrum guide 7. Further, a yarn guiding plate 14 for removing the yarn from the traversing guide of the traversing device 10 is attached to the downstream side of the traversing device 10. Further, a threading guide 8 is provided near the spindle 12.

[0019] In the above winding device, the running yarn 1 is sucked in by the suction gun 13, passed through the twill vibration fulcrum guide 7, contacts the yarn guiding guide 9 and the yarn guiding plate 14, and waits through the threading guide 8. Next, the threading guide 8 moves from the position of the broken line in FIG. 2 to the position of the solid line by air or electric drive or the like. At that time, the running yarn 1 enters and is gripped by the yarn gripping portion 16 provided on the bobbin for winding 15, and since the spindle 12 is rotating in the direction of the arrow, the yarn is cut on the downstream side due to the yarn tension. At that time, since the yarn guiding guide 9 is at a position where it allows the yarn gripping portion 16 to grip the yarn, it is wound in a rod shape to form a tail bunch. After that, the yarn guiding guide 9 moves in the central direction of the bobbin along the guide 17 toward the central direction of the bobbin for winding 15, thereby forming a tail. When the yarn guiding guide 9 moves, the yarn guiding guide 9 is hidden by the guide 17, and the running yarn 1 is detached from the yarn guiding guide 9. After that, the running yarn 1 moves to the central portion which is the traversing region due to the yarn tension. Further, winding is started from the time when it engages with the traversing guide.

[0020] Next, the thread gripping portion 16 of the present invention will be described in more detail. FIG. 4 is a schematic diagram showing details of the thread gripping portion 16 of the present invention, and FIG. 5 is a schematic diagram showing the surface shape of the thread gripping portion 16. The thread gripping portions 16 of the present invention are arranged in a plurality of equal positions on the circumferential surface of one end portion of the bobbin 15 for winding thread. The equal arrangement means arranging at equal intervals from the rotation center of the bobbin 15 for winding thread. For example, when there are two thread gripping portions 16, they are arranged at 180° intervals, and when there are four, they are arranged at 90° intervals. It is preferable to arrange them equally at 2 to 6 positions based on the ratio of the length of the thread gripping portion to the circumferential length of the bobbin 15 for winding thread.

[0021] By arranging them equally in this way, when the running yarn 1 is pressed against the thread gripping portion 16 provided on the bobbin 15 for winding thread that rotates during thread switching, the opportunity for the running yarn 1 to be gripped is periodically given without bias, resulting in a stable thread hanging operation and good thread hanging performance. On the other hand, if they are not arranged equally, since the time for the running yarn 1 to be pressed against a portion other than the thread gripping portion 16 becomes long, the running yarn 1 is bounced off the rotating bobbin 15 for winding thread, or the running yarn 1 breaks due to friction with the surface of the bobbin for winding thread, causing the thread hanging to fail.

[0022] The thread gripping portion 16 of the present invention uses the hook portion of a hook-and-loop fastener. More specifically, the thread gripping portion 16 has a length of 5.0 to 10.0% with respect to the width on the rotation axis of the bobbin 15 for winding thread. By setting the length within such a range, the end portion of the wound thread does not come into contact with the thread gripping portion 16, and it becomes easy to regulate the thread path when pressing the running yarn 1 within the range of the thread gripping portion 16, improving the thread hanging performance. By setting the length of the thread gripping portion 16 to 5.0% or more with respect to the width on the rotation axis of the bobbin 15 for winding thread, it becomes easy to regulate the thread path when pressing the running yarn 1 within the range of the thread gripping portion 16 during thread switching, improving the thread hanging performance. Also, when the length is large, the end portion of the wound thread comes into contact with the end portion of the thread gripping portion 16, causing an abnormality in the winding form, so it is preferably 10% or less.

[0023] The yarn gripping portion 16 of the present invention has a length of 5.0 to 11.0% with respect to the circumferential length of the bobbin 15 for winding yarn. By setting the length of the yarn gripping portion 16 within such a range, the chance that the running yarn 1 is gripped by the yarn gripping portion 16 during yarn switching increases, thereby improving the yarn hanging property and also making the workability during yarn peeling smooth. By setting the length of the yarn gripping portion 16 to be 5.0% or more with respect to the circumferential length of the bobbin 15 for winding yarn, the chance that the running yarn 1 is gripped by the yarn gripping portion 16 during yarn switching increases, thereby improving the yarn hanging property. Further, by setting the length of the yarn gripping portion 16 to be 11.0% or less with respect to the circumferential length of the bobbin 15 for winding yarn, the workability is good in the process of peeling off the wound yarn.

[0024] Figure 6 is a schematic diagram when the yarn gripping portion 16 of the present invention grips the running yarn 1. The shear strength when a tensile stress is applied to the hook portion of the hook-and-loop fastener provided in the yarn gripping portion 16 of the present invention in a state of being adhered to the loop portion is 4.0 to 8.0 N / cm 2 , and the peel strength is 0.6 to 1.0 N / cm. The shear strength is the difficulty of peeling when the hook portion and the loop portion of the hook-and-loop fastener are adhered and bonded together and pulled horizontally with respect to the bonded surface, and indicates the deformation strength of the hook portion in the horizontal direction. That is, it is an index indicating the difficulty of the hook portion coming out in the horizontal direction when the hook portion grips the yarn. The peel strength is the difficulty of peeling when pulled vertically with respect to the bonded surface, and indicates the deformation strength of the hook portion in the vertical direction. That is, it indicates the difficulty of the hook portion deforming when the running yarn 1 is pressed against the yarn gripping portion 16 during yarn switching.

[0025] By using a hook-and-loop fastener having a shear strength and a peel strength within such a range, when the running yarn 1 is pressed against the yarn gripping portion 16 and the running yarn 1 enters the hook, it deforms without bouncing the running yarn 1, and it is possible to prevent the running yarn 1 from coming out of the hook after being gripped. By setting the shear strength and the peel strength to be 4.0 N / cm 2 or more and 0.6 N / cm or more respectively, the force for the running yarn 1 to come out of the hook after being gripped by the yarn gripping portion 16 can be suppressed, and the yarn hanging property is improved. Further, by setting the shear strength and the peel strength to be 8.0 N / cm 2Hereinafter, by setting it to 1.0 N / cm or less, when the running yarn 1 is pressed against the yarn gripping portion 16, the hook deforms and the running yarn 1 can enter inside the hook, improving the yarn hanging property.

[0026] The hook portion of the hook-and-loop fastener used for the yarn gripping portion 16 of the present invention has two types of hook portions with different hook heights on the base fabric 18, and a pair is arranged such that the tip portions thereof face each other. A pair adjacent to each other in the front, rear, left, and right directions are equally arranged at intervals of 1.0 mm to 1.5 mm. By equally arranging the hook portions at such intervals, a gap is formed through which the running yarn 1 pressed against the yarn gripping portion 16 can smoothly enter inside the hook, and an appropriate number of hooks is obtained, and the running yarn 1 is surely gripped by the yarn gripping portion 16. By setting the interval between the hook portions of the yarn gripping portion 16 to 1.0 mm or more for a pair adjacent to each other in the front, rear, left, and right directions, a gap is formed through which the running yarn 1 can smoothly enter inside the hook, improving the yarn hanging property. Also, by setting the interval between the hook portions of the yarn gripping portion 16 to 1.5 mm or less for a pair adjacent to each other in the front, rear, left, and right directions, the number of hooks on the yarn gripping portion 16 increases, and the chance of the running yarn 1 being gripped by the hook portion increases, improving the yarn hanging property.

[0027] The two types of hook portions with different hook heights on the base fabric 18 of the hook-and-loop fastener are defined as the large hook portion 20 and the small hook portion 21. The large hook portion 20 has a hook height that is 20 to 30 times the yarn diameter of the running yarn 1 to be wound, and the small hook portion 21 has a hook height that is 10 to 15 times the yarn diameter of the running yarn 1 to be wound. By setting the hook portions to such heights, a gap is formed through which the running yarn 1 pressed against the yarn gripping portion 16 can enter inside the hook, and the yarn once gripped is less likely to come off. By setting the hook heights of the large hook portion 20 and the small hook portion 21 to 20 times or more and 10 times or more, respectively, there is sufficient room for the hook to deform sufficiently when the running yarn 1 is pressed, and the running yarn 1 easily enters inside the hook, improving the yarn hanging property. Also, by setting the hook heights of the large hook portion 20 and the small hook portion 21 to 30 times or less and 15 times or less, respectively, the gap inside the hook does not become too large, and the gripped running yarn 1 is less likely to come off the hook, improving the yarn hanging property.

[0028] Since the above-mentioned hook-and-loop fastener is used by applying an adhesive to the back surface of the base fabric 18 and attaching it to the peripheral surface of one side end of the bobbin 15 for winding at equal intervals, even if the hook portion of the yarn gripping portion is damaged and the yarn hanging property is reduced or the adhesive surface is peeled off during repeated use, the yarn hanging property can be improved again by attaching a new hook-and-loop fastener. In addition, unlike a paper tube or a bobbin for winding yarn having a yarn gripping groove, there is no need to replace the entire bobbin with a new one, resulting in good maintainability and economy.

[0029] Furthermore, the secondary effects of using the hook-and-loop fastener for the yarn gripping portion 16 will be described below. As described above, the yarn gripping portion 16 of the present invention has a length of 5.0 to 10.0% with respect to the width on the rotation axis of the bobbin for winding yarn. Conventional yarn gripping grooves of paper tubes or bobbins for winding yarn mainly have an opening for introducing the running yarn into the yarn gripping groove, and the width of the opening gradually narrows from there, and the yarn is gripped by the deepest yarn gripping groove. However, it is conceivable that the width of the yarn gripping groove is narrow and the width of the groove expands during use, resulting in a decrease in yarn gripping performance. On the other hand, since a plurality of hook portions are arranged at equal intervals within the length range of the yarn gripping portion 16 of the present invention, the running yarn 1 can be gripped anywhere within the range of the yarn gripping portion 16. Therefore, it is easy to regulate the yarn path when introducing the yarn, and since the yarn is gripped dispersedly by a plurality of hook portions, the pressing force of the yarn does not concentrate at one point during yarn gripping, and it is possible to suppress a decrease in gripping performance due to repeated use.

[0030] The yarn suitable for the winding device of synthetic fibers of the present invention is not particularly limited as long as it is a synthetic fiber capable of melt spinning such as polyamide fiber or polyester fiber. Such synthetic fibers are allowed to contain, for example, other homopolymers, copolymerized polymers, pigments, dyes, matting agents, antifouling agents, fluorescent brighteners, flame retardants, stabilizers, ultraviolet absorbers, and lubricants.

[0031] In addition, the synthetic fibers produced in the present invention may be fibers obtained by either single-component spinning or composite-component spinning. In the case of fibers obtained by composite-component spinning, examples include fibers such as core-sheath type composite fibers, side-by-side type composite fibers, sea-island type composite fibers, and multi-component simultaneous mixed spinning fibers. Further, the cross-sectional shape of the synthetic fiber is not limited to a round shape, and may also be a triangular or flat irregular shape, or even a hollow shape.

Examples

[0032] Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited to these examples. The measured values in the examples were measured by the following methods.

[0033] (1) Shearing strength Measured according to JIS-L-3416 (2000), and the type of the corresponding fastener was a loop tape.

[0034] (2) Peel strength Measured according to JIS-L-3416 (2000), and the type of the corresponding fastener was a loop tape.

[0035] (3) Yarn winding success rate In an 8-bobbin winding machine, the yarn winding operation was performed 10 times under each condition, and it was confirmed whether all 8 bobbins had shifted to winding after the yarn winding operation. The yarn winding property was evaluated as follows according to the ratio. ◎: Yarn winding success rate 100% 〇: Yarn winding success rate 70 - 99% ×: Yarn winding success rate 0 - 69%.

[0036] (Example 1) In a core-sheath composite monofilament, polyethylene terephthalate was used as the sheath component and a nylon polymer was used as the core component. After melting each at 295°C using an extruder-type extruder, pump metering was performed at a weight ratio of 95:5 so as to obtain 22 dtex, and the mixture was made to flow into a die formed into a single filament of 1 filament. The yarn extruded from the die at a spinning temperature of 290°C was cooled and solidified through a cooling device, and then oiled by an oiling device. Thereafter, the tension was adjusted with first and second godet rollers, and the winding operation was performed 10 times in total with a winding device set at a rotational speed of 1496 m / min during the winding operation. At this time, the width on the rotation axis of the bobbin for winding yarn attached to the spindle of the winding device was 92.5 mm, the circumference was 492 mm, the yarn gripping portions were equally arranged at 4 positions on the circumferential surface of one end of the bobbin for winding yarn, the length with respect to the width on the rotation axis of the bobbin for winding yarn was 9 mm (9.2% with respect to the bobbin for winding yarn), the length with respect to the circumference of the bobbin for winding yarn was 50 mm (10.2% with respect to the bobbin for winding yarn), the two types of hook heights were 1.5 mm (21.4 times the yarn diameter) and 0.7 mm (10 times the yarn diameter) respectively, and a pair in which the tip portions of the respective hook portions faced each other was equally arranged at intervals of 1.0 mm in the front, rear, left, and right directions, and the shear strength was 7.24 N / cm 2 The hook portion of a hook-and-loop fastener with a peel strength of 0.81 N / cm was used.

[0037] The results of the winding operation 10 times in total showed a winding success rate of 100% (N = 10), and both the gripping state of the yarn and the state of the tail bunch after the implementation were good.

[0038] (Example 2) Except that low-viscosity polyethylene terephthalate was used as the sheath component and high-viscosity polyethylene terephthalate was used as the core component, and the weight ratio was changed to 80:20 at 6 dtex, the winding operation was performed 10 times in total in the same manner as in Example 1. The two types of hook heights of the yarn gripping portions were 30 times (1.5 mm) and 14 times (0.7 mm) the yarn diameter respectively. Similar to Example 1, the winding success rate was 100% (N = 10), and both the gripping state of the yarn and the state of the tail bunch after the implementation were good.

[0039] (Comparative Example 1) The yarn hanging operation was performed 10 times in the same manner as in Example 1, except that only one yarn gripping portion was provided on the circumferential surface of one end portion of the bobbin for winding. The yarn hanging success rate was inferior at 30% (N = 10), and no tail bunch serving as the starting point of winding was formed at the yarn gripping portion of the bobbin where the yarn hanging failed.

[0040] (Comparative Example 2) The yarn hanging operation was performed 10 times in the same manner as in Example 1, except that the four yarn gripping portions of the bobbin for winding were arranged unevenly. The yarn hanging success rate was inferior at 40% (N = 10), and no tail bunch serving as the starting point of winding was formed at the yarn gripping portion of the bobbin where the yarn hanging failed.

[0041] (Example 3) The yarn hanging operation was performed 10 times in the same manner as in Example 1, except that the length of the yarn gripping portion with respect to the width on the rotation axis of the bobbin for winding was changed to 3 mm (3.2% with respect to the bobbin for winding). The yarn hanging success rate was 70% (N = 10).

[0042] (Example 4) The yarn hanging operation was performed 10 times in the same manner as in Example 1, except that the length of the yarn gripping portion with respect to the width on the rotation axis of the bobbin for winding was changed to 5 mm (5.4% with respect to the bobbin for winding). The yarn hanging success rate was 100% (N = 10), and both the gripping state of the yarn and the state of the tail bunch after the implementation were good.

[0043] (Example 5) The yarn hanging operation was performed 10 times in the same manner as in Example 1, except that the length of the yarn gripping portion with respect to the width on the rotation axis of the bobbin for winding was changed to 13 mm (14.1% with respect to the bobbin for winding). The yarn hanging success rate was 90% (N = 10).

[0044] (Example 6) The thread hanging operation was carried out 10 times in the same manner as in Example 1, except that the length of the thread gripping portion with respect to the circumference of the bobbin for winding was changed to 15 mm (3.0% with respect to the bobbin for winding). The thread hanging success rate was 80% (N = 10).

[0045] (Example 7) The thread hanging operation was carried out 10 times in the same manner as in Example 1, except that the length of the thread gripping portion with respect to the circumference of the bobbin for winding was changed to 25 mm (5.1% with respect to the bobbin for winding). The thread hanging success rate was 100% (N = 10), and both the gripping state of the thread and the state of the tail bunch after the implementation were good.

[0046] (Example 8) The thread hanging operation was carried out 10 times in the same manner as in Example 1, except that the length of the thread gripping portion with respect to the circumference of the bobbin for winding was changed to 75 mm (15.2% with respect to the bobbin for winding). The thread hanging success rate was 80% (N = 10).

[0047] (Example 9) The hook portion of the surface fastener of the thread gripping portion was changed to one with a shear strength of 2.0 N / cm 2 and a peel strength of 0.3 N / cm, and the thread hanging operation was carried out 10 times in the same manner as in Example 1. The thread hanging success rate was 70% (N = 10).

[0048] (Example 10) The hook portion of the surface fastener of the thread gripping portion was changed to one with a shear strength of 4.0 N / cm 2 and a peel strength of 0.6 N / cm, and the thread hanging operation was carried out 10 times in the same manner as in Example 1. The thread hanging success rate was 100% (N = 10), and both the gripping state of the thread and the state of the tail bunch after the implementation were good.

[0049] (Example 11) The hook portion of the surface fastener of the thread gripping portion was changed to one with a shear strength of 10.0 N / cm 2Except for changing the peeling strength to 1.2 N / cm, the thread-hanging operation was performed 10 times in the same manner as in Example 1. The thread-hanging success rate was 80% (N = 10).

[0050] (Example 12) Except for changing the hook parts of the hook-and-loop fastener of the thread gripping part to those with two types of hook heights of 0.8 mm (11.4 times the thread diameter) and 0.4 mm (5.7 times the thread diameter) respectively, the thread-hanging operation was performed 10 times in the same manner as in Example 1. The thread-hanging success rate was 70% (N = 10).

[0051] (Example 13) Except for changing the hook parts of the hook-and-loop fastener of the thread gripping part to those with two types of hook heights of 2.1 mm (30 times the thread diameter) and 1.0 mm (14.3 times the thread diameter) respectively, the thread-hanging operation was performed 10 times in the same manner as in Example 1. The thread-hanging success rate was 100% (N = 10), and both the gripping state of the thread and the state of the tail bunch after implementation were good.

[0052] (Example 14) Except for changing the hook parts of the hook-and-loop fastener of the thread gripping part to those with two types of hook heights of 2.7 mm (38.6 times the thread diameter) and 1.4 mm (20 times the thread diameter) respectively, the thread-hanging operation was performed 10 times in the same manner as in Example 1. The thread-hanging success rate was 90% (N = 10).

[0053] (Example 15) Except for changing the hook parts of the hook-and-loop fastener of the thread gripping part to those with a hook height of 1.5 mm and equally arranged at intervals of 1.0 mm in the front, back, left, and right directions, the thread-hanging operation was performed 10 times in the same manner as in Example 1. The thread-hanging success rate was 90% (N = 10).

[0054] (Example 16) The thread hanging operation was carried out 10 times in the same manner as in Example 1, except that the hook portion of the hook-and-loop fastener of the thread gripping portion was changed to one in which the hooks were equally spaced at intervals of 0.5 mm in the front-back, left-right directions. The thread hanging success rate was 70% (N = 10).

[0055] (Example 17) The thread hanging operation was carried out 10 times in the same manner as in Example 1, except that the hook portion of the hook-and-loop fastener of the thread gripping portion was changed to one in which the hooks were equally spaced at intervals of 1.5 mm in the front-back, left-right directions. The thread hanging success rate was 100% (N = 10), and both the gripping state of the thread and the state of the tail bunch after the implementation were good.

[0056] (Example 18) The thread hanging operation was carried out 10 times in the same manner as in Example 1, except that the hook portion of the hook-and-loop fastener of the thread gripping portion was changed to one in which the hooks were equally spaced at intervals of 2.0 mm in the front-back, left-right directions. The thread hanging success rate was 80% (N = 10).

[0057]

Table 1

[0058]

Table 2

[0059] From the above results, the thread gripping portion has a length of 5.0 to 10.0% with respect to the width on the rotation axis of the bobbin for winding the thread, and a length of 5.0 to 11.0% with respect to the circumference of the bobbin for winding the thread. The shear strength when a tensile stress is applied in a state where the hook portion of the hook-and-loop fastener of the thread gripping portion is adhered to the loop portion is 4.0 to 8.0 N / cm 2When the peel strength is 0.6 to 1.0 N / cm, it has two types of hooks with different hook heights, where one hook height is 20 to 30 times the yarn diameter of the winding yarn, and the other hook height is 10 to 15 times the yarn diameter of the winding yarn. When a pair is arranged such that the tip portions of the two types of hooks face each other and are equally arranged at intervals of 1.0 to 1.5 mm between adjacent pairs in the front, back, left, and right directions, it is possible to maintain good productivity and workability while maintaining a good yarn hanging success rate. The results are summarized in Tables 1 and 2.

Explanation of Signs

[0060] 1 Traveling yarn 2 Spinning duct 3 Oil supply device 4 First tension adjustment roller 5 Second tension adjustment roller 6 Winding device 7 Twill swing fulcrum guide 8 Yarn hanging guide 9 Yarn guiding guide 10 Traversing device 11 Surface pressure roller 12 Spindle 13 Suction gun 14 Yarn guiding plate 15 Bobbin for yarn winding 16 Yarn gripping part 17 Guide 18 Base fabric 20 Large hook part 21 Small hook part

Claims

1. In a synthetic fiber winding device, a plurality of yarn gripping portions provided on a yarn bobbin are equally arranged on the circumferential surface of one end portion of the yarn bobbin, the synthetic fiber winding device, wherein the yarn gripping portion includes a hook portion of a hook-and-loop fastener.

2. The synthetic fiber winding device according to claim 1, characterized in that the size of the yarn gripping portion is a length of 5.0 to 10.0% with respect to the width on the rotation axis of the yarn bobbin and a length of 5.0 to 11.0% with respect to the circumferential length of the yarn bobbin.

3. The shear strength when a tensile stress is applied to the hook portion of the surface fastener in a state where it is adhered to the loop portion is 4.0 to 8.0 N / cm 2 , and the peeling strength is 0.6 to 1.0 N / cm. The synthetic fiber winding device according to claim 1 or 2, characterized in that.

4. The hook portion of the hook-and-loop fastener has two types of hook portions with different hook heights, the synthetic fiber winding device according to claim 1 or 2, characterized in that one hook height is 20 to 30 times the yarn diameter of the yarn to be wound, and the other hook height is 10 to 15 times the yarn diameter of the yarn to be wound.

5. The synthetic fiber winding device according to claim 4, characterized in that a pair of the two types of hook portions of the hook-and-loop fastener are arranged such that the tip portions of the hooks face each other, and are equally arranged at intervals of 1.0 to 1.5 mm for a pair adjacent to each other in the front, rear, left, and right directions.

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