JP2002114443A - Thread winding device and method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To certainly start punch winding and to prevent entanglement of a thread end in a package at the time of changing the thread package in a fully wound state to an empty bobbin. SOLUTION: A guide member 11 is made free to advance and retreat from below against a thread guide Y1 by mounting it on an oscillating arm 20 and constituted of a fixed guide part 11a and a movable guide part 11b. When the thread package P comes to be in the fully wound state, the guide member 11 is engaged with the thread guide Y1, and the movable guide part 11b is moved by a proper distance roughly in the vertical direction against the thread guide Y1. Consequently, it is possible to guide thread to a punch-winding position of the empty bobbin 9a and possible to certainly start punch-winding. As movement of the thread in the left and right directions is constrained by a cutout 12b of the movable guide part 11b, it is possible to restrain deflection of a thread and formed at the time of cutting in the cross direction, and consequently, it is possible to prevent entanglement of the tread end in the package by certainly forming the punch-winding at the punch-winding position at the time of the punch-winding.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for winding a yarn into a bobbin to form a package. About technology.

[0002]

FIG. 9 is a schematic diagram showing an example of a yarn winding device 7 such as a take-up winder for manufacturing a yarn Y from a spinning material and winding the yarn Y into a yarn package. As shown in the figure, the yarn Y spun by a spinning machine (not shown) is
It is fed to the yarn winding device 7 via the godet rollers 5 and 6. The yarn winding device 7 forms the yarn package P by winding the yarn Y around the bobbin 9 by the rotational driving force applied by the contact roller 8.

When the yarn package P is fully wound, it is necessary to change the winding target to the empty bobbin 9a. For this reason, in the conventional yarn winding device, two bobbins 9, 9a are mounted on a turret 10 which can be driven to rotate, and when one bobbin 9 is fully wound, the turret 10 is rotated as shown in FIG. , The yarn winding process is continued on the other empty bobbin 9a, and the full package P
Is configured to discharge.

[0004]

When the winding of the yarn is switched from the fully wound yarn package P to the empty bobbin 9a,
The yarn must be securely wound around the bunch winding position of the empty bobbin 9a. Therefore, conventionally, on the upstream side and the downstream side of the empty bobbin 9a, there are arranged yarn pulling guides 1 and 2 which can move in the axial direction of the empty bobbin 9a having engagement portions with the yarn, and these guides 1 and 2 are engaged with the yarn. Means have been proposed for combining and moving to the cut position formed at the bunch winding position at the end of the empty bobbin 9a. Reference numeral 3 in the figure denotes a holding guide for preventing the yarn from falling from the yarn layer of the full package P.

In the above-mentioned conventional apparatus, after the yarn is bunch-wound around the empty bobbin 9a to cut the yarn between the full package and the yarn end, the behavior of the yarn end is not stable, and the yarn end is immediately after the start of winding. There was a problem that it was caught inside. The yarn winding device 7 shown in FIG. 10 is a device that winds a multifilament yarn such as a polyester yarn at a high speed. In the case of a yarn winding device that winds an elastic yarn such as a urethane rubber yarn, a bunch winding position, a yarn layer position, and the like. , The problem of thread entanglement frequently occurs. It is extremely important that the yarn end is protruded outside the package when piecing with another package in the next process, and when the yarn end is entangled in the package, the next piecing is performed. Work becomes very difficult.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned conventional problems, a feature of a yarn winding device adopted by the present invention is that means for switching an object to be brought into contact with a contact roller from a full package to an empty bobbin. And a guide member that can advance and retreat with respect to the yarn path between the empty bobbin and the full package when the yarn reaches the full package via the empty bobbin, and the guide member includes A bunch winding guide for winding a yarn at a bunch winding position of an empty bobbin. The bunch winding guide has a restraining portion that engages the yarn from both sides in the axial direction of the empty bobbin to restrain the yarn from moving in the axial direction of the empty bobbin. That you are doing. The guide member in the yarn winding device is configured to restrain the movement of the yarn in the axial direction of the bobbin by the restraining portion, and thus restrains the deflection of the yarn in the axial direction of the bobbin while the yarn is bunched around the empty bobbin. Therefore, when the yarn is cut between the full bobbin package and the bunch winding is performed on the empty bobbin, the yarn end can be prevented from swaying right and left, so that the yarn end at the beginning of the bunch winding can be reliably secured. To prevent it from getting caught in the package.

In the yarn winding device, the guide member is configured to be able to advance to a position where the yarn between the empty bobbin and the full package is bent at an angle of 45 ° or more and less than 180 °. Is desirable.

In the yarn winding device, when the guide member is engaged with the yarn between the empty bobbin and the full package, the guide member is simultaneously engaged with the yarn between the contact roller and the empty bobbin. It is also possible to set as follows.
According to this configuration, one guide member can be engaged with the yarn on both the upstream side and the downstream side of the empty bobbin, and the yarn can be guided. Therefore, by moving the guide member, the yarn can be surely moved. Can be wound around the bunch winding position.

Further, when the yarn reaches the full package via the empty bobbin, the yarn can advance and retreat with respect to the yarn path between the contact roller and the empty bobbin, and cooperate with the guide member. It is also possible to provide a sub-guide member which operates to wind the yarn around the bunch winding position of the empty bobbin. By employing such a configuration, it is possible to more reliably wind the yarn around the bunch winding position.

Note that the guide member and the sub guide member are
It may be configured integrally with a yarn winding guide for winding the yarn around the empty bobbin. According to this configuration, the yarn winding guide ensures the yarn transfer from the full package to the empty bobbin. Since the bunch winding guide member and the auxiliary guide member are provided integrally with the yarn winding guide, the structure is simplified.

The present invention also provides a yarn winding method capable of solving the above-mentioned conventional problems, and is characterized in that, when switching the yarn winding target from a full package to an empty bobbin, The yarn forms a yarn path leading to the full package via the empty bobbin, and guides the yarn between the empty bobbin and the full package to the bunch winding position of the empty bobbin. Is restrained by a guide member so as to prevent the movement of the empty bobbin in the axial direction. Thereafter, the yarn between the empty bobbin and the full package is cut to form a bunch winding at the bunch winding position of the empty bobbin. Is to do. According to such a method, the yarn is moved to the bunch winding position of the empty bobbin, and the movement of the yarn in the axial direction of the empty bobbin is restrained by the guide member, so that the deflection of the yarn end when the yarn is cut and the bunch winding is started is reduced. This can prevent the end of the bunch from being entangled in the package where the new winding is started.

In the yarn winding method, the bending angle of the yarn when the restraining portion of the guide member is engaged with the yarn is 45 °.
It is desirable to set the angle to be equal to or more than (preferably 90 ° or more) and less than 180 °. The bending angle is an angle formed by the extension of the yarn path from the empty bobbin to the engagement point of the guide member and the yarn path from the engagement point of the guide member to the full package. Can be adjusted. When the bending angle is less than 45 °, the yarn tension becomes low, and the force for restraining the behavior of the yarn becomes weak. Therefore, it may be difficult to prevent the yarn end from swaying right and left at the start of bunch winding after yarn cutting. Further, if the bending angle is 180 ° or more, the yarn is folded back so as to overlap at the engagement point of the guide member, so that it is practically impossible to set.

Further, in the above-mentioned yarn winding method, before cutting the yarn, the yarn between the contact roller and the empty bobbin may be set to be guided to the bunch winding position of the empty bobbin by the guide member.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] FIG. 1 relates to a yarn winding machine for an elastic yarn which is an embodiment of a yarn winding device W according to the present invention, and only a main part is schematically shown. It is shown in This figure shows a situation when the winding target of the elastic yarn Y such as a urethane rubber thread is switched from the fully wound yarn package P to the empty bobbin 9a, and FIG. (B) is a front view as viewed from obliquely above, and (C) is a side view. In the drawing, reference numeral 8 denotes a contact roller for applying a contact pressure to the package P during winding of the yarn, 9 denotes a bobbin of the yarn package P in a fully wound state, 9a denotes an empty bobbin, and 10 denotes two bobbins 9, 9a. Is a rotatable turret that supports the bobbin holders BH ₁ and BH _{2 on} which is mounted, and 11 is a guide member having an engagement portion with the thread Y.
Note Each bobbin holder BH _1, BH ₂ respectively, a plurality of bobbin 9,9a is mounted.

The yarn winding device W of the present embodiment includes a guide member 11
And by attaching the swing arm 20 relative to the yarn path Y ₁ extending from the empty bobbin 9a yarn package P of fully wound state it is then movably configured from below. Further, the guide member 11 is formed by a fixed guide portion 11a and a movable guide portion 11b.
And the guide member 11 is engaged with the yarn Y from both sides in the axial direction of the empty bobbin 9a.
Is provided for restraining the movement of. Based on such a configuration, the yarn winding device W of the present embodiment reliably performs bunch winding on the empty bobbin 9a when switching the winding of the yarn from the full yarn package P to the empty bobbin 9a in the manner described below. Further, it is possible to prevent the yarn end of the bunch winding from being caught in the yarn layer of the package.

As shown in FIG. 2A, during the winding process, the contact roller 8 is brought into contact to apply a contact pressure and a rotational driving force to the yarn package P, and the yarn is traversed by the traverse device T while being traversed. Take up Y. When the yarn package P becomes full, each bobbin holder BH ₁ , BH
₂ to drive the empty bobbin 9a and the yarn package P.
, And the turret 10 is rotated by 180 ° to bring the empty bobbin 9a into contact with the yarn Y as shown in FIG. 3B, and then the turret 10 is further rotated by 90 ° to the position shown in FIG. by, forming the yarn path Y ₂ between the contact roller 8 and the empty bobbin 9a. Next, the swing arm 20 is driven to rotate the guide member 11, and the yarn path Y ₁ shown by a two-dot chain line between the empty bobbin 9a and the yarn package P.
To after the guide member 11 is engaged from below, by further advancing upwardly, as indicated by the solid line in FIG. (C), between the contact roller 8 and an empty bobbin 9a of the yarn path Y ₂ to a position just before contact with the yarn portion moves the yarn portion of the yarn path Y _1. The tip of this time the guide member 11, so that also engage the yarn portion of the yarn path Y _2. Thus, the yarn Y is in a state wound up the entire circumference near the empty bobbin 9a, the yarn path Y ₁ is in a state of being folded by the guide member 11. The movable guide portion 11b of the guide member 11 also functions as a yarn winding guide that winds the yarn Y around the empty bobbin 9a to increase the contact length between the yarn Y and the empty bobbin 9a.

As described above, the guide member 11 is connected to the yarn path Y.
Once engaged with the thread portion of the _1, Y _2, as shown in FIG. 3 (B), the movable guide portion 11b of the guide member 11, is moved by suitable distance in the axial direction X of the empty bobbin 9a. As a result, the yarn in contact with the empty bobbin 9a is
The bunch can be guided to the bunch winding position a, and the bunch winding can be started reliably. That is, FIG.
From the state of (B), the rotational speed of the yarn package P by rapidly decelerating slack the yarn portion of the yarn path Y _1. Thus, the thread portion of the yarn path Y ₁ is in contact with the yarn portion of the yarn path Y _2,
Results yarn portion of the yarn path Y ₁ is drawn into the yarn portion of the yarn path Y _2, the yarn Y comes to bunch winding is started wrapped around the bunch winding position of the empty bobbin 9a.

Shortly after bunch winding is started on the empty bobbin 9a, the yarn path Y ₁ between the empty bobbin 9a and the full package P is started.
Is cut in the middle of the process. In this example, the movable guide portion 11
The b notch 12b as substantially V-shaped, by engaging the thread portions of the yarn path Y ₁ in the bottom portion of the V-shaped notches 12b,
Since the movement of the yarn Y in the left-right direction is restrained, the yarn end formed at the time of cutting can be prevented from swaying left and right. Therefore, when the bunch is wound, the yarn end is caught in the package. Can be prevented.

By the way the thread portion of the yarn path Y ₂ between the contact roller 8 and the empty bobbin 9a, as shown in FIG. 3 (C), the edge and the inlet side of the V-shaped notch 12b in the movable guide part 11b (figures (Upper side). Movable guide part 1
Site to be engaged with the thread portion of the yarn path Y ₂ side of the notch 12b of 1b is a yarn portion of the yarn path Y ₂ is moved to the bunch winding position of the empty bobbin 9a, yarn path Y ₁ in the guide member 11 during bunch winding The yarn Y is guided to the bunch winding position of the empty bobbin 9a in cooperation with a portion engaged with the yarn portion on the side. Since the thread portion of the yarn path Y ₂ side is not cut, a portion to engage the yarn portion of the yarn path Y ₂ in the movable guide section 11b need not have a function of suppressing the yarn Y is deflected to the left and right. Therefore, it is necessary to have a structure that can be securely engaged with the yarn even if the position of the yarn is slightly shifted. For this reason, the yarn path Y ₂ in the notch 12b of the movable guide portion 11b
The portion that engages with the yarn portion on the side is formed so as to contact only one axial side of the empty bobbin 9a with the yarn. In this example,
The left edge of the notch 12b of the movable guide portion 11b (the area above the vertical portion b) corresponds to this. Notch 12
The right edge of b is formed to be inclined as shown in the figure, and is located at a sufficient distance from the engagement position with the thread at the left edge.

[0020] By contrast, a portion to engage the yarn portion of the yarn path Y ₁ side of the guide member 11, the yarn during yarn path Y ₁ side of the yarn portion is moved to a bunch winding position of the empty bobbin 9a bunch winding In addition to the function of guiding the yarn to the bunch winding position, a function of restricting the behavior of the yarn in the axial direction of the empty bobbin 9a at the time of yarn cutting is required. Therefore, portions to be engaged with the thread portion of the yarn path Y ₁ in the guide member 11 is formed so as to sandwich from both sides (left and right direction in FIG. 3) axially empty bobbin 9a to the yarn.
In this example, the left and right edges of the bottom region in the notch 12b of the movable guide portion 11b correspond to this. When the yarn portion of the yarn path Y ₁ side is inserted to the bottom of the notches 12b, in contact with the edge of the left and right lateral sides of the yarn portion at the bottom region of the notch 12b, for restraining the yarn in the lateral direction. Notch 12b
Distance between the right and left edges of the portions to be engaged with the thread portion of the yarn path Y ₁ side is appropriately set to a dimension that can restrain the yarn in the axial direction of the empty bobbin 9a in.

[0021] As described above, the guide portion to be engaged with the thread portion of the yarn path Y ₁ side of the member 11, when the yarn Y is in a state leading to the full package P through the empty bobbin 9a ( in FIG. 2 (C) see), it becomes retractable relative to the yarn path Y ₁ between the empty bobbin 9a and full package P, and, engage from both sides of the empty bobbin axis with respect to the thread And has a restraining portion for restraining the movement of the yarn in the axial direction of the empty bobbin, and serves as a downstream bunch winding guide for winding the yarn around the bunch winding position of the empty bobbin 9a. On the other hand, the portion to be engaged with the thread portion of the yarn path Y ₂ side of the guide member 11, at the time when the yarn Y is in a state leading to the full package P through the empty bobbin 9a, the contact roller 8 and the empty bobbin together they have become retractable relative to the yarn path Y ₂ between 9a, the downstream side of the engaging portion of the guide member 11 has a bunch winding guide in cooperation with the yarn empty bobbin 9a This is a bunch winding guide on the upstream side wound around the bunch winding position.

Further, for the yarn package P in the fully-wound state,
Since the fixed guide portion 11a for preventing the introduced yarn from deviating from the yarn layer forming position of the package P is provided, the movable guide portion 11b folds the yarn away from the bobbin yarn layer forming position. Even if the yarn is moved to the position, the yarn can be reliably wound around the yarn layer of the yarn package P. Accordingly, it is possible to eliminate a yarn passing error caused by the yarn coming off the yarn layer of the yarn package P. Further, in this example, the notch 12a of the fixed guide portion 11a
A vertical portion f facing the moving direction X of the movable guide portion 11b, while the notch 12b of the movable guide portion 11b is formed.
Also, a vertical portion g facing the moving direction X is formed.
By providing these vertical portions f and g, it is possible to make it difficult for the yarn to drop off from the guide member 11.

The guide member 11 (movable guide portion 11)
The b) when engaged with the yarn path Y _1, it is desirable to satisfy the following conditions. That is, as shown in FIG. 4, to engage the guide member 11 to yarn path Y _1, formed by bending angle α of 45 ° 180 ° or more than the range at the time of the state immediately before the yarn is cut, preferably 90 ° or more and 180 °
Less than the range. Here, the bending angle α is that when engaged the guide member 11 to yarn path Y _1, and the extension line m of yarn path l, from the empty bobbin 9a to engagement point k, engagement points k
From the thread path n to the fully wound yarn package P. When the bending angle α is less than 45 °,
Since the tension acting on the yarn at the time of yarn cutting becomes insufficient, the behavior of the yarn end may become unstable. The bending angle α is 1
When the angle is set to 80 ° or more, the yarn is folded at the engagement point k, which is difficult to set in practice. On the other hand, when the bending angle α is set in the range of 45 to 180 °, an appropriate tension can be applied to the yarn, so that the behavior of the yarn end is stabilized when the yarn is cut after the start of the bunch winding. It is effective for

In this embodiment, the yarn Y shown in FIG.
FIG. 2C shows the state in which
As shown in (2), an operation of switching the yarn winding target from the full package P to the empty bobbin 9a in a state where the turret 10 is turned approximately 270 ° in the same direction as the rotation direction of the bobbins 9 and 9a (yarn transfer operation). However, since the contact length between the yarn Y and the empty bobbin 9a is increased, the yarn Y is easily wound around the empty bobbin 9a, and the success rate of yarn switching is improved. In this example also, at this time, to form a yarn path Y ₂ therebetween apart the contact roller 8 and an empty bobbin 9a, the yarn portion of the yarn path Y ₂ upstream bunch winding guide (in this example the movable The empty bobbin 9a is moved to the bunch winding position by the guide portion 11b). As in the conventional example shown in FIG. 10, the yarn pulling guide 1 is provided on the upstream side of the contact roller 8, and the yarn pulling guide 1 moves the yarn portion on the upstream side to the bunch winding position of the empty bobbin 9a. In this case, it is necessary to temporarily remove the yarn Y from the traverse device. On the other hand, by moving the yarn portion between the contact roller 8 and the empty bobbin 9a as in the present example, there is an advantage that the yarn transfer operation can be performed without removing the yarn Y from the traverse device. Can be

[Second Embodiment] FIG. 5 relates to a different embodiment of the present invention, and shows a case where a yarn winding device W to which the present invention is applied is a yarn winding machine for elastic yarn. Things. Differs from the above embodiment of the present embodiment, the middle of the yarn path Y ₂ extending from the contact roller 8 to the empty bobbin 9a,
A retractable relative to the yarn path Y _2, and, there is to provided an auxiliary guide member 13 was made to be movable in the axial direction of the empty bobbin 9a. In this example, the movable guide portion 11b is a downstream bunch winding guide, and the separate auxiliary guide member 13 is an upstream bunch winding guide. Auxiliary guide member 1
3, the contact roller 8 at the time of non-operation from the yarn path Y ₂
It is configured to retreat to the side. Note that the auxiliary guide member 13 can be installed on the upstream side of the contact roller 8.

[Third Embodiment] As shown in FIG. 6, it is also possible to omit the fixed guide portion in the guide member 14 and to provide only the movable guide portion. This example is for bunch-winding the yarn end portion at the end of winding in the full package P, that is, for forming a winding end bunch in the full package P. If a winding end bunch is formed on the yarn package P, the end of the yarn can be easily removed from the yarn package P.

When the yarn Y is moved to the bunch winding position by the guide member 14, since the fixed guide portion is not provided in this embodiment,
The yarn wound on the yarn layer of the full package P separates from the yarn layer and falls onto the bobbin 9 of the full package P. At this time, there is a possibility to fail yarn transfer in the yarn rapidly loosened, in advance prior to moving the yarn Y, by increasing the rotational speed of the full package P, increase the yarn tension of the yarn path Y ₁ part Like that.

Further, in this example, at the time of the yarn transfer operation, the yarn end portion at the beginning of winding on the empty bobbin 9a is bunch-wound, that is, the bunch is formed on the empty bobbin 9a and the winding is completed on the full package P. Since the bunch is formed, both the winding start bunch and the winding end bunch are ultimately formed in the full package P. However, in this example, the winding start bunch and the winding end bunch are formed at substantially the same position. Therefore, when it is desired to form both bunches at different positions, that is, when the winding start bunch is formed at one end of the bobbin and the winding end bunch is formed at the other end of the bobbin, for example, the fixed guide portion shown in FIG. A second movable guide formed in the same shape as 11a may be provided so as to be movable in the bobbin axis direction, and the second movable guide may be moved in a direction opposite to the first movable guide. .

[Fourth Embodiment] FIG.
The configuration of the portion that engages with the thread in the fifth 5
It is what it was. In the above-described embodiment, the shape of the engagement portion with the thread is a V-shaped notch. However, a similar function can be exerted by using the slit 15 as in this example. That is, after the guide member 15 is lifted from the lower side and the yarn path Y1 on the downstream side of the empty bobbin 9a is engaged with the slit 15a, the slit member ₁ is further advanced, so that the slit 1
Also engage the yarn path Y ₂ on the upstream side of the empty bobbin 9a in 5a. Thereafter, the guide member 15 can be moved in the axial direction of the empty bobbin 9a to guide the yarn to the bunch winding position of the empty bobbin 9a.

FIG. 8 shows a case in which a plurality of yarn packages P are wound and formed in the elastic yarn spinning winder W of the first embodiment. 2 shows an entire configuration of the guide member 11. The guide member 11 is composed of a fixed guide portion 11a and a movable guide portion 11b, and each of the guide portions 11a and 11b has a notch 12 at a predetermined interval corresponding to the interval at which the package P is formed.
a, 12b are formed. A suitable driving means 30 such as an air cylinder, a hydraulic cylinder, an electromagnetic actuator or the like is attached to the fixed guide portion 11a, and the drive shaft of the driving means 30 and the movable guide portion 11b are connected by a suitable connecting member 31. The movable guide 11b is fixed to the fixed guide 1.
It is configured to be able to move a predetermined distance in the lateral direction (axial direction of the bobbin) with respect to 1a.

[0031]

As described above, according to the present invention,
In the yarn winding process, when switching the yarn winding target from the fully wound yarn package to the empty bobbin, the empty bobbin can reliably start bunch winding,
It is possible to prevent the yarn end generated by cutting from being caught in the yarn package that has newly started winding. Therefore,
Since the yarn package obtained according to the present invention exhibits good quality and the yarn end is drawn outward,
The piecing operation in the next step can be performed simply and reliably.

[Brief description of the drawings]

FIG. 1 shows a schematic configuration of a main part of a yarn winding device for an elastic yarn according to a first embodiment of the present invention, and FIG. 1A shows a state in which a guide member is engaged with the yarn. FIG. 2B is a front view of the same state as viewed obliquely from above, and FIG. 2C is a side view showing a state before the guide member is engaged with the yarn.

FIG. 2 is a side view showing a schematic configuration of a main part of the yarn winding device according to the first embodiment of the present invention, wherein FIG. 2A is a state in which a yarn winding process is being performed, and FIG. A state in the middle of switching between the fully wound yarn package and the empty bobbin, and FIG. (C) shows a state in which the empty bobbin starts bunch winding.

FIG. 3 is a drawing showing a main part of a guide member of the yarn winding device according to the first embodiment of the present invention, and FIG. 3A is a plan view showing a state where the guide member is engaged with the yarn; FIG. 2B is a plan view showing a state in which the movable guide section is moved to start bunch winding, and FIG. 2C is a plan view showing a cutout portion of the movable guide section in FIG.

FIG. 4 is a side view showing a main part of the yarn winding device according to the first embodiment of the present invention, illustrating a bending angle formed when the guide member is engaged with the yarn. .

FIG. 5 shows a schematic configuration of a main part of a yarn winding device according to a second embodiment of the present invention, and FIG. 5 (A) is a perspective view showing a state where a guide member is engaged with a yarn; FIG. 2B is a front view of the state in which the movable guide portion of the guide member is moved, as viewed obliquely from above.

FIG. 6 shows a schematic configuration of a main part of a yarn winding device according to a third embodiment of the present invention, and FIG. 6 (A) is a perspective view showing a state where a guide member is engaged with a yarn; FIG. 7B is a front view of the state in which the guide member is moved, as viewed obliquely from above.

FIG. 7 shows a schematic configuration of a main part of a yarn winding device according to a fourth embodiment of the present invention, and FIG. 7 (A) is a perspective view showing a state where a guide member is engaged with a yarn; FIG. 7B is a front view of the state in which the guide member is moved, as viewed obliquely from above.

FIG. 8 is a plan view schematically showing the entire configuration of the yarn winding device according to the first embodiment of the present invention, wherein FIG. 8A is a state in which a guide member is engaged with a yarn, and FIG. Shows a situation in which the movable guide section is moved to start bunch winding.

FIG. 9 is a schematic view showing an example of a conventional yarn winding device.

FIG. 10 is a schematic view showing a main part of a conventional yarn winding device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Turret 11 ... Guide member 11a ... Fixed guide part 11b ... Movable guide part 12a ... Notch (fixed side) 12b ... Notch (movable side) 13 ... Auxiliary guide member 14 ... Guide member 14a ... Slit 15 ... Guide member 15a ... Notch 20: swing arm BH ₁ ... bobbin holder BH ₂ ... bobbin holder P ... thread package W ... thread winding device T ... traverse device Y ... thread Y ₁
Vertical portion k ... engagement point l cutouts of ... vertical portion g ... movable guide portion of the notch of the upstream side of the yarn path alpha ... bending angle f ... fixed guide portion of the downstream side of the yarn path Y ₂ ... empty bobbin empty bobbin
... Yarn path from empty bobbin to engagement point m ... Extension line of yarn path l n ... Yarn path from engagement point to yarn package X ... Movement direction of movable guide section

Claims (7)

[Claims] 1. An apparatus for winding a yarn on a bobbin to form a package, comprising: means for switching an object to be brought into contact with a contact roller from a full package to an empty bobbin; A guide member that can advance and retreat with respect to a yarn path between the empty bobbin and the full package when the state reaches the wound package, and the guide member winds the yarn around the bunch winding position of the empty bobbin. Bunch winding guide having a restraining portion that engages with the yarn from both sides in the axial direction of the empty bobbin and restrains the movement of the yarn in the axial direction of the empty bobbin. . 2. The yarn winding device according to claim 1, wherein the guide member is capable of advancing to a position where the yarn between the empty bobbin and the full package is bent at an angle of 45 ° or more and less than 180 °. . 3. The yarn path between the contact roller and the empty bobbin when the yarn reaches the full package via the empty bobbin, and is cooperable with the guide member. The yarn winding device according to claim 1, further comprising a sub-guide member that operates to wind the yarn around a bunch winding position of the empty bobbin. 4. The yarn winding device according to claim 1, wherein the guide member and the auxiliary guide member are integrally formed with a yarn winding guide for winding a yarn around an empty bobbin. 5. A method for winding a yarn on a bobbin to form a package, wherein when the yarn winding target is switched from a full package to an empty bobbin, the yarn passes through an empty bobbin to form a full package. The yarn between the empty bobbin and the full package is guided to the bunch winding position of the empty bobbin, and the yarn between the empty bobbin and the full package is guided by the guide member in the axial direction of the empty bobbin. A yarn winding method, wherein the yarn is constrained to prevent movement, and thereafter, the yarn between the empty bobbin and the full package is cut to form a bunch winding at the bunch winding position of the empty bobbin. 6. The yarn winding method according to claim 5, wherein the yarn between the empty bobbin and the full package is bent by 45 ° or more and less than 180 ° by a guide member before the yarn is cut. 7. The yarn winding method according to claim 5, wherein the yarn between the contact roller and the empty bobbin is guided to the bunch winding position of the empty bobbin by the guide member before the yarn is cut.