JPH06156874A - Changeover taking-up for yarn and device therefor - Google Patents

Abstract

PURPOSE:To provide the method and device for selectively taking up a yarn which eliminates the generation of a faulty article in the selection of yarn and secures the high succession rate in selection. CONSTITUTION:A selective taking-up device for yarns is constituted so that the yarns are successively switched on other bobbin when a package obtains a prescribed taking-up quantity for a yarn through the traverse of yarn on a bobbin installed on one between two bobbin holders. The switch of yarns is carried out by using a bobbin 22 having a yarn holding groove 22a at the edge part of the circumferential surface and a recessed part 22b on the taking-up peripheral surface. At this time, the relative position between two bobbin holders 3 and 4 is shifted in the axial direction, and the traverse movement of the yarn L taken up on the package 23 is suspended, and the thread path for the is positioned in the vicinity of the edge surface on the package, and the yarn taken up on the package is brought into contact with the vacant bobbin circumferential surface between the yarn holding groove of the vacant bobbin and the recessed part on the vacant bobbin peripheral surface, and when the contact angle of the yarn with the bobbin outer peripheral surface becomes equal to a prescribed angle, the yarn is led to the yarn holding groove and held in the yarn holding groove.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention winds a yarn as a package on a bobbin mounted on one bobbin holder, and when the yarn amount of the package reaches a predetermined winding amount, the bobbin on the other bobbin holder is sequentially switched. The present invention relates to a method for switching an automatic yarn winding machine and a device for implementing the method.

[0002]

2. Description of the Related Art In a conventional automatic switching winder, when switching, the relative positions of two bobbin holders in the axial direction are moved to stop the traverse motion of the yarns, and the yarns are moved near the package end surface. When the yarn comes into contact with the outer circumference of the bobbin mounted on the empty bobbin holder, the yarn comes into contact with the outer circumference of the bobbin within the winding width of the package on the empty bobbin, and the yarn makes contact with the outer circumference of the bobbin. After the angle reaches a predetermined angle, the yarn is guided to the yarn holding groove, and the yarn is held in the yarn holding groove.

[0003]

In recent years, there has been an increasing tendency to save resources, and paper bobbins have been reused, that is, bobbins once used for winding have been collected and reused. As described above, when the paper bobbin is reused, a concave portion is formed on the peripheral surface of the paper bobbin due to the winding pressure of the package wound on the bobbin (see FIG. 7).

When the yarns are switched by using such a reusable bobbin, the yarns are caught in the recesses on the peripheral surface of the bobbin made of paper, and the yarns are thus caught in the yarn holding groove formed at the end of the bobbin. There is a problem that the input timing is delayed, which causes frequent switching failures, resulting in a low switching success rate of about 85 to 90%.

In order to protect the yarn quality of the innermost layer when the bobbin comes into contact with the contact roller, a recess is provided on the outer circumference of the paper tube on the inner side in the axial direction in the vicinity of the end of the package wound on the paper tube. It is possible to prevent the yarn from being damaged by being strongly pressed by the contact roller and the bobbin at the start of winding the yarn, but in this case as well, as shown in FIG.
A similar problem occurs due to the depression.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems, to eliminate the occurrence of defective switching, and to provide a yarn winding and winding method and device having a high switching success rate.

[0007]

SUMMARY OF THE INVENTION In the present invention, the bobbin holder having two bobbin holders for the above-mentioned purpose is wound on a bobbin attached to one bobbin holder while traversing a yarn, and the bobbin holder is one of the bobbin holders. When the number of yarns wound on the upper bobbin reaches a predetermined amount, in the yarn switching winder that sequentially switches the yarns to the bobbin on the other bobbin holder,
When the yarns are switched using a bobbin having a yarn gripping groove at the end of the circumferential surface and a recess on the yarn winding peripheral surface as the bobbin, the two bobbin holders are moved relative to each other in the axial direction. The traverse movement of the yarn wound on the package is stopped, the yarn path of the yarn is positioned near the end face on the package, and the yarn holding groove of the empty bobbin and the recess on the peripheral surface of the empty bobbin are formed. The yarn wound on the package is brought into contact with the circumferential surface of the empty bobbin between the two, and when the contact angle of the yarn with the outer peripheral surface of the bobbin reaches a predetermined angle, the yarn is guided into the yarn gripping groove and the yarn gripping is performed. This is achieved by a thread switching winding method characterized by being gripped in a groove.

Further, according to the present invention, the bobbin holder has two bobbin holders as an apparatus for carrying out the above method, and the bobbin attached to one bobbin holder is wound around the bobbin while winding the package, and the one bobbin holder is wound. When the number of yarns wound on the upper bobbin reaches a predetermined amount, the two bobbin holders move their relative positions in the axial direction in a yarn switching winder that sequentially switches the yarns to the bobbin on the other bobbin holder. Means, means for stopping the traverse motion of the yarn wound on the package, and positioning the yarn path of the yarn near the end face on the package, yarn gripping groove at the end of the circumferential surface of the empty bobbin Means for bringing the yarn wound on the package into contact with the circumferential surface of the empty bobbin between the concave portion of the yarn winding peripheral surface, and the yarn when the contact angle of the yarn with the outer peripheral surface of the bobbin reaches a predetermined angle. In the thread grip groove There yarn switching winding device is provided which comprises a means for gripping the thread gripping groove.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a front view of a winder of the present invention, FIG. 2 is a view immediately before a yarn comes into contact with an empty bobbin in the winder shown in FIG. 1, (a) is a front view, and (b) is ( It is a sectional side view of a).

The structure will be described below with reference to the drawings. Figure 2
As shown in (b), the turret table 5 is attached to the machine casing 1.
Is rotatably supported by a bearing 6, and two bobbin holders 3 and 4 are rotatably projected on the turret table 5. The bobbin holder 3 is driven by a motor 24, and the bobbin holder 4 is driven by a motor 25.

A cylindrical cam 7 is coaxially fixed to the machine frame at the outer peripheral position of the turret table 5. Cam followers 8 and 9 are fixed to the root side supporters 3a and 4a of the bobbin holders 3 and 4, respectively, and a groove 7a that engages with the cam followers 8 and 9 is formed in the inner diameter portion of the cam 7. As a result, when the yarn is switched, the cam followers 8 or 9 fixed to the bobbin holders 3 or 4 located on the empty bobbin side by the rotation of the turret table 5 engage with the grooves 7a, and the bobbin holders 3 or 4 are axially moved. It is designed to move.

In this embodiment, the bobbin holders 3 and 4 are moved in the axial direction by the turret table and the cam, but they may be moved by a fluid cylinder or other driving device.

A gear 10 is fixed to the outer circumference of the turret table 5, a stepping motor 11 is fixed to the machine frame 1, and the gear 10 is engaged with a gear 12 fixed to the shaft of the stepping motor 11. When the yarn is switched, the turret table 5 is moved to 180 by the stepping motor 11.
The bobbin holder on the take-up side and the bobbin holder on the reserve side are sequentially replaced by rotating each time. When winding the yarn, the stepping motor 11 is excited to drive the turret table 5
Is fixed at a predetermined winding position.

In FIGS. 1 and 2, two slide bearings (not shown) are fixedly attached to the machine frame 1, and a slide block (not shown) is supported on the slide bearings so as to be vertically movable. , The slide block has a contact roller 13 rotatably supported by a frame 32.
And a traverse device 17 for projecting the yarn in the axial direction of the bobbin holder. The slide block provided with the contact roller 13 and the traverse device 17 protruding therefrom is supported by a cylinder (not shown), and a predetermined pressure contact force is applied between the contact roller 13 and the bobbin mounted on the bobbin holder 3.

In the present embodiment, the traverse device 17 is of a type in which a slider is reciprocally moved by a scroll cam, but it may be of a rotary blade type or any other known type.

A yarn removing guide 19 for removing the yarn from the traverse guide 17a of the traverse device 17 is arranged above the traverse device 17 when the yarn is switched. The yarn removing guide 19 is swung to the contact roller 13 side by the cylinder 2 around the fulcrum 19a.

A bunch guide 20 is arranged on the frame 32 above the contact roller 13. At the time of switching, the bunch guide 20 is formed with a regulation groove 20a for regulating the yarn removed from the traverse guide 17a in the vicinity of the yarn holding groove 22a formed on the bobbin and within the traverse width. . The regulation groove 20a moves in the axial direction of the bobbin holders 3 and 4 after the yarn is grasped by the yarn grasping groove 22a, and is transferred to the bobbin 22 on the transfer tail (pig tail).
To mold.

Next, the operation of this embodiment having the above structure will be described with reference to FIGS. The package 23 is wound on the bobbin 21 mounted on the bobbin holder 3 (FIG. 1). When the package 23 reaches a predetermined amount, the bobbin holder 4 on the reserve side is activated by the motor 25,
When the rotation speed reaches a predetermined value, the stepping motor 11 is activated to rotate the turret table 5.

Next, the package 23 is separated from the contact roller 13 by the rotation of the turret table 5,
The bobbin holder 4 starts moving in the R direction from the state shown in FIGS.

The yarn removing guide 19 swings toward the contact roller 13 side around the fulcrum 19a, and the yarn guide 17 is moved.
Remove the yarn from a, insert the yarn into the regulation groove 20a formed on the bunch guide 20, and regulate the yarn near the yarn holding groove formed on the bobbin and near the end face of the package to determine the outer circumference of the package. The bunch winding 23a is formed.

Next, as shown in FIGS. 2A and 2B, the bobbin holder 4 is slid in the R direction so that the yarn regulated in the regulation groove 20a is recessed 22b in the bobbin 22 mounted on the bobbin holder 4. And the thread grip groove 20a. The position of this thread is between the recess 22b and the thread grip groove 22a, and does not fall into the recess 22b and thread grip groove 22a, preferably at a position corresponding to the end of the package formed with the thread grip groove. It is preferable to set it in the range.

Further, as shown in FIGS. 4 (a) and 4 (b), the turret table 5 rotates, the outer circumference of the bobbin 22 mounted on the bobbin holder 4 contacts the yarn, and the yarn is wound around the outer periphery of the bobbin 4. When wound at a predetermined angle, the bobbin holder 4 starts moving in the R direction again.

When the yarn slides on the surface of the bobbin 22 and reaches the yarn holding groove 20a, the yarn is held in the yarn holding groove 22a,
The yarn is cut with the package 21.

Next, the movement of the bobbin holder 4 in the R direction is temporarily stopped, and a predetermined bunch winding is formed in the vicinity of the thread gripping groove 22a.

Next, as shown in FIG. 5, the bobbin holder 4 moves in the opposite R direction, and a transfer tail (pig tail) is formed on the bobbin 22.

Then, the yarn removing guide 19 is returned to release the yarn from the regulation groove 20a formed in the bunch guide 20, and the yarn guide 17a starts the traverse movement to wind the package onto the bobbin 22.

Next, the bobbin holder 3 is braked, the package 23 is taken out, and the bobbin is mounted. Next, when the number of yarns wound on the bobbin 22 reaches a predetermined amount, the above operation is repeated.

The movement locus of the bobbin holder is shown in FIG.
Other loci may be used as shown in (c) or as long as the yarn can be carried as described above.

[0029]

According to the present invention, when the yarn is switched, the traverse motion of the yarn is stopped, the yarn is positioned near the end face of the package, and the yarn comes into contact with the outer circumference of the bobbin mounted on the empty bobbin holder. In doing so, the thread and the outer circumference of the bobbin are brought into contact between the thread gripping groove formed on the bobbin and the recess of the bobbin, and the contact angle between the thread and the outer circumference of the bobbin becomes a predetermined angle, and the thread is Even in a reusable bobbin or a bobbin provided with a recess for protecting the yarn quality of the innermost layer to guide the thread to the thread grip groove, the thread does not get caught in the recess and the thread smoothly enters the thread grip groove. The success rate of switching is 99.
It improved to 5 to 100%.

[Brief description of drawings]

FIG. 1 is a front view of a winder adopting the present invention.

FIG. 2 is a view immediately before the yarn comes into contact with the empty bobbin,
(A) is a front view, (b) is a side sectional view of (a), (c) is an AA arrow sectional view of (b).

3A and 3B are diagrams illustrating a switching procedure, showing a case where a turret table is rotated and a contact roller and a package are separated from each other, FIG. 3A is a front view, and FIG. 3B is a side view.

FIG. 4 shows a state in which the yarn comes into contact with an empty bobbin and the yarn and the bobbin have a predetermined contact angle, (a) is a front view,
(B) is a side view.

FIG. 5 is a side view showing a state in which a transfer tail (pig tail) is formed on the bobbin and the movement of the bobbin holder in the opposite R direction is completed.

FIG. 6 shows a switching state in the related art, (a)
Is a front view, and (b) is a side view of (a).

FIG. 7 is a front view showing the shape of a reusable bobbin.

FIG. 8 is a diagram showing an axial movement locus of the bobbin holder according to the present invention.

[Explanation of symbols]

 1 Machine frame 3 Bobbin holder 3a Supporter 4 Bobbin holder 4a Supporter 5 Turret table 6 Bearing 7 Cylindrical cam 7a Groove 8 Cam follower 9 Cam follower 10 Gear 11 Stepping motor 12 Gear 13 Contact roller 17 Traverse device 17a Thread traverse guide 19 20 bunch guide 20a regulation groove 22 bobbin 22a thread gripping groove 22b dent 24 motor 25 motor 32 frame

Claims (3)

[Claims] 1. A bobbin having two bobbin holders, the package is wound on a bobbin attached to one bobbin holder while traversing the yarn, and a predetermined amount of the yarn is wound on the bobbin on the one bobbin holder. When the bobbin reaches the bobbin on the other bobbin holder, the yarn switching winding machine sequentially switches the yarns, and the bobbin has a yarn gripping groove at the end of the circumferential surface and a recess on the yarn winding peripheral surface. When the bobbins are used to switch the yarns, the two bobbin holders are moved relative to each other in the axial direction to stop the traverse motion of the yarns wound on the package, and the yarn paths of the yarns are stopped. Is located near the end surface of the package, and the thread wound on the package is brought into contact with the empty bobbin circumferential surface between the thread gripping groove of the empty bobbin and the recess on the empty bobbin circumferential surface, and the bobbin outer circumference of the thread is Predetermined contact angle to the surface When the angle becomes, the yarn is guided into the yarn gripping groove and is gripped in the yarn gripping groove. 2. A yarn located near the end surface of the package is provided between the thread holding groove of the empty bobbin and an empty bobbin peripheral surface position corresponding to the end surface position of the package formed on the empty bobbin. The switching winding method of a yarn according to claim 1, characterized in that the winding is performed. 3. A bobbin having two bobbin holders, the package is wound on a bobbin attached to one of the bobbin holders while traversing the yarn, and a predetermined amount of the yarn is wound on the bobbin on the one bobbin holder. When it reaches, in the yarn switching winder that sequentially switches the yarns to the bobbin on the other bobbin holder, means for moving the relative positions of the two bobbin holders in the axial direction, twill of the yarns wound on the package. Means for stopping the swinging motion to position the yarn path of the yarn near the end face on the package, between the yarn gripping groove at the end of the circumferential surface of the empty bobbin and the recess on the yarn winding peripheral surface. Means for contacting the yarn wound on the package with the circumferential surface of the empty bobbin,
A yarn switching winding device comprising means for guiding a yarn to the yarn gripping groove and causing the yarn to be gripped by the yarn gripping groove when a contact angle of the yarn on the outer peripheral surface of the bobbin reaches a predetermined angle.