CN108298369B

CN108298369B - Winding device, yarn winding unit, and yarn winding machine

Info

Publication number: CN108298369B
Application number: CN201810000779.5A
Authority: CN
Inventors: 桂知纳
Original assignee: Murata Machinery Ltd
Current assignee: Murata Machinery Ltd
Priority date: 2017-01-11
Filing date: 2018-01-02
Publication date: 2021-07-06
Anticipated expiration: 2038-01-02
Also published as: CN108298369A; JP2018111565A

Abstract

The winding device of the present invention winds a supplied yarn onto a package while traversing the yarn, and includes: the yarn guide device comprises a traverse mechanism (110) which is arranged on the winding drum (22) side with respect to a yarn path through which a yarn (Y) wound into a package (P) passes and reciprocates a traverse guide (112) engaged with the yarn (Y), and a guide cover (103) which faces the traverse guide (112) with the yarn path of the yarn (Y) therebetween and covers the traverse guide (112) which reciprocates from the yarn path side of the yarn (Y). A slit (103c) having a width (W1) of less than 20mm is provided in the yarn guide cover (103).

Description

Winding device, yarn winding unit, and yarn winding machine

Technical Field

The invention relates to a winding device, a yarn winding unit and a yarn winding machine.

Background

There is a winding device that winds a yarn into a package by traversing the yarn and pressing the surface of the package against a winding drum. Such a winding apparatus is described in, for example, japanese patent application laid-open No. 2013-253353. In such a winding device, in order to temporarily decelerate or stop winding of the yarn, lifting is performed in which the rotation of the package is decelerated or stopped by separating the package from the winding drum. When the package is lifted, the yarn wound into the package moves in a direction away from the traverse mechanism in accordance with the movement of the package. In order to restrict this movement, a yarn guide cover for restricting the movement of the yarn is provided in the take-up device.

For example, when a yarn break occurs, the package is moved farther from the winding drum than when it is lifted, and the yarn end on the package side and the yarn end on the device side for supplying the yarn are spliced together. After the yarn splicing, the package is pushed again onto the take-up drum. In this case, a slit is provided in the yarn guide cover so that the yarn connected to the package can be moved from the yarn supplying device to the traverse mechanism side through the yarn guide cover.

Since the yarn guide cover is provided with the slit, it is considered that the yarn is separated from the yarn guide cover by the yarn passing through the slit when the yarn is lifted.

Disclosure of Invention

Therefore, the present invention provides a winding device, a yarn winding unit, and a yarn winding machine that can suppress the yarn from being separated from a carrier cover when the package is lifted.

The winding device of the present invention winds a supplied yarn onto a package while traversing the yarn, and includes: a winding drum that presses the package against a surface and rotates the pressed package, a traverse mechanism that includes a traverse guide that is disposed on a side of the winding drum with respect to a yarn path through which a yarn wound into the package passes and that engages with the yarn, and a driving section that reciprocates the traverse guide in a direction of a rotation axis of the winding drum, and a guide cover that extends across a movement range of the traverse guide in a direction in which the traverse guide reciprocates across the yarn path and the traverse guide in a direction in which the traverse guide reciprocates across the yarn path, the guide cover covering the traverse guide that reciprocates from the side of the yarn path; the yarn guide cover has a slit extending in a direction intersecting with a reciprocating direction of the traverse guide when viewed from the yarn guide cover toward the traverse guide; the slit penetrates the yarn guide cover in the direction from the yarn guide cover to the traverse guide; the size of the slit in the direction in which the traverse guide reciprocates, that is, the width, is less than 20 mm.

In this winding device, since the width of the slit provided in the carrier cover is smaller than 20mm, the yarn is less likely to pass through the slit when the package is lifted, as compared with the case where the width of the slit is 20mm or more. This can prevent the yarn from being separated from the yarn carrier cover that restricts the movement of the yarn when the package is lifted.

The width of the slit may be 13mm or less. In this case, it is more difficult for the yarn to pass through the slit when the package is lifted. This can further prevent the yarn from coming off the yarn carrier cover that restricts the movement of the yarn when the yarn carrier is lifted. The width of the slit may be 5mm or more.

The winding device further comprises a traverse cover which is arranged on the winding roller side of the yarn path, extends along the reciprocating direction of the traverse guide, and covers the traverse mechanism from the upper part; the traverse mechanism cover is provided with an upper side cover part covering the upper part of the traverse mechanism and a yarn path side cover part extending downwards from the end part of the yarn path side of the upper side cover part and covering the yarn path side of the traverse mechanism; the yarn channel side cover part is a plate-shaped component; when viewed along a perpendicular direction orthogonal to a surface of the yarn path side cover portion on the yarn path side, the position of the upper end of the yarn carrier cover coincides with the position of the lower end of the yarn path side cover portion, or the upper end of the yarn carrier cover overlaps with the lower end of the yarn path side cover portion; the shortest distance between the upper end of the yarn guide cover and the yarn path side surface of the yarn path side cover part is less than 6 mm. In this case, even when a foreign object such as a screw falls, it is possible to prevent the foreign object from entering the traverse mechanism side from between the upper end of the yarn guide cover and the yarn path side cover.

The winding device further comprises a range limiting part which is fixed on the traverse cover, extends from the traverse cover to one side of the yarn path, then extends to the lower side, and limits the moving range of the yarn in the reciprocating direction of the traverse guide; the yarn carrier cover is connected to the tip portion of the range limiting portion on the lower side. In this case, the range regulating section also serves as a mechanism for attaching the yarn carrier cover, and therefore, the structure of the winding device is simplified.

Of the end edges of the yarn guide cover, the downstream end edge in the moving direction of the yarn wound into the package is inclined toward the upstream side in the moving direction of the yarn as the distance from the slit increases. For example, when the package is pressed against the winding drum again after the yarn is cut and pieced, the yarn comes into contact with the end edge of the yarn guide cover on the downstream side in the yarn moving direction. The yarn is easily slid into the slit by the inclination of the end edge against which the yarn abuts. Thus, the winding device can easily move the yarn to the traverse mechanism side through the slit of the yarn guide cover.

The winding device includes a package support portion capable of supporting the package, and a moving mechanism for moving the package support portion between a contact position where the package contacts the winding drum, a lifted position where the package is separated from the winding drum, and a retracted position where the package is farther from the winding drum than the lifted position.

The yarn winding unit of the present invention includes a yarn supplying section for supplying a yarn and the winding device. Thus, even in the yarn winding unit including the yarn feeding section and the winding device, the yarn can be prevented from being separated from the carrier cover when the package is lifted.

The yarn winding machine of the present invention includes a plurality of the yarn winding units. Thus, even in a yarn winding machine including a plurality of yarn winding units, the yarn can be prevented from being separated from the carrier cover when the package is lifted.

The yarn winding machine may be a spinning machine including: the yarn supply section includes a draft device that drafts the fiber bundle and an air-jet spinning device that twists the fiber bundle drafted by the draft device by a twist airflow to generate a yarn; the yarn accumulating device is arranged between the air spinning device and the winding device and used for accumulating the yarn, and the yarn is supplied to the winding device from the yarn accumulating device; the driving section is a traverse shaft extending in the arrangement direction of the plurality of yarn winding units and on which traverse guides provided in the plurality of yarn winding units are mounted; the traverse guides of the plurality of yarn winding units are driven to reciprocate in the direction of the rotation axis of the winding drum by a traverse shaft, and reciprocate together.

The invention has the following effects: according to the present invention, the yarn can be prevented from being separated from the yarn carrier cover when the package is lifted.

Drawings

Fig. 1 is a front view of a spinning machine according to an embodiment;

figure 2 is a perspective view of the end face drop prevention yarn guide;

FIG. 3 is a front view of the take-up device;

FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 3;

fig. 5 is a cross-sectional view showing a state where the package is lifted;

FIG. 6 is a cross-sectional view showing a state where the package is again pressed against the winding drum after the splicing;

fig. 7 is an enlarged view of the periphery of the slit of fig. 3, showing the positional relationship between the right-side groove and the slit;

fig. 8 is a further enlarged view of the periphery of the slit in fig. 3, showing the positional relationship between the right-side groove and the reference position.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals, and redundant description thereof will be omitted.

As shown in fig. 1, a spinning machine (yarn winding machine) 1 includes: a plurality of spinning units (yarn winding units) 2, a yarn splicing cart 3, a doffing cart (not shown), a 1 st end frame 4, and a 2 nd end frame 5. The plurality of spinning units 2 are arranged in a row. Each spinning unit 2 generates a yarn Y and winds it into a package P. When the yarn Y of a certain spinning unit 2 is cut or the yarn Y is broken for some reason, the yarn splicing cart 3 performs yarn splicing operation in the spinning unit 2. When the package P of a certain spinning unit 2 is fully wound, the doffing cart doffs the package P and supplies a new bobbin (core tube) B to the spinning unit 2.

A recovery device for recovering waste fibers, broken yarns, and the like generated in the spinning unit 2 is housed in the 1 st end frame 4. The 2 nd end frame 5 accommodates an air supply unit for adjusting the pressure of compressed air (air) supplied to the spinning machine 1 and supplying the air to each unit of the spinning machine 1, a drive motor for powering each unit of the spinning unit 2, and the like. The 2 nd end frame 5 is provided with a body control device 51, a display screen 52, and input keys 53. The body control device 51 centrally manages and controls each part of the spinning machine 1. The display screen 52 can display information on the setting content and/or the state of the spinning unit 2. The operator can perform the setting operation of the spinning unit 2 by performing an appropriate operation using the input key 53.

Each spinning unit 2 includes, in order from the upstream side in the traveling direction of the yarn Y, a draft device (yarn feeding section) 6, an air-jet spinning device (yarn feeding section) 7, a yarn monitoring device 8, a tension sensor 9, a yarn accumulating device 11, a waxing device 12, and a winding device 13. The unit controller 10 is provided for every predetermined number of the spinning units 2, and controls the operation of the spinning units 2.

The draft device 6 drafts the sliver (fiber bundle) S. The air-jet spinning machine 7 twists the fiber bundle F drafted by the draft device 6 with a twist air flow to produce a yarn Y. The yarn accumulating device 11 is provided between the rotor spinning machine 7 and the winding device 13, and can accumulate the yarn Y. The yarn accumulating device 11 eliminates slack of the yarn Y between the rotor spinning machine 7 and the winding device 13. The waxing device 12 applies wax to the yarn Y between the yarn accumulating device 11 and the winding device 13. The winding device 13 winds the yarn Y supplied from the yarn accumulating device 11 onto the bobbin B while traversing the yarn to form a package P.

The yarn monitoring device 8 monitors information on the running yarn Y between the air-jet spinning machine 7 and the yarn accumulating device 11, and detects the presence or absence of a yarn defect based on the monitored information. When a yarn defect is detected, the yarn monitoring device 8 transmits a yarn defect detection signal to the unit controller 10. The tension sensor 9 measures the tension of the running yarn Y between the rotor spinning machine 7 and the yarn accumulating device 11, and sends a tension measurement signal to the unit controller 10. The unit controller 10 cuts the yarn Y in the spinning unit 2 when it is determined that there is an abnormality based on the detection result of the yarn monitoring device 8 and/or the tension sensor 9.

The details of the winding device 13 will be described below. In the present embodiment, the direction will be described with the upstream side in the moving direction of the yarn Y as "up" and the downstream side as "down". As shown in fig. 1 to 4, the winding device 13 includes a cradle arm 21 (package support portion, see fig. 1), a winding drum 22, a traverse cover 23, an end face drop prevention guide 100, and a traverse mechanism 110. In fig. 1, for convenience of illustration, a part of the components around the winding device 13 is omitted. The cradle arm 21 rotatably supports the bobbin B, i.e., the package P. The swing arm 21 is swingably supported so that the surface of the bobbin B or the surface of the package P contacts the surface of the winding drum 22 with an appropriate pressure. A moving mechanism (not shown) is connected to the rocker arm 21. The moving mechanism is configured to be capable of swinging the cradle arm 21 to a contact position where the package P contacts the winding drum 22, a lifted position where the package P is separated from the winding drum 22, and a retracted position where the package P is further away from the winding drum 22 than the lifted position. The moving mechanism is, for example, a cylinder.

The surface of the winding drum 22 is pressed by the package P, and the pressed package P is rotated. A driving motor (not shown) provided in the 2 nd end frame 5 simultaneously drives the take-up drums 22 of the plurality of spinning units 2. Thereby, in each spinning unit 2, the bobbin B or the package P rotates in the winding direction.

The traverse mechanism 110 is disposed on the winding drum 22 side with respect to a yarn path through which the yarn Y wound into the package P passes. The traverse mechanism 110 includes a traverse shaft (driving section) 111 and a traverse guide 112. The traverse shaft 111 is shared by the plurality of spinning units 2. The traverse shaft 111 extends in the arrangement direction of the plurality of spinning units 2. The traverse shaft 111 is reciprocally driven in the direction of the rotation axis K of the take-up drum 22 by the drive motor of the 2 nd end frame 5. The traverse guide 112 is attached to the traverse shaft 111 and extends downward from the traverse shaft 111. A guide portion 112a that engages the yarn Y is provided at a lower tip portion of the traverse guide 112. The traverse shaft 111 is driven to reciprocate in the direction of the rotation shaft K of the winding drum 22 by the drive motor of the 2 nd end frame 5, and the plurality of traverse guides 112 reciprocate together in the direction of the rotation shaft K of the winding drum 22, that is, in the direction indicated by the arrow T (see fig. 3 and 7). Thus, the guide portion 112a of the traverse guide 112 traverses the yarn Y with respect to the rotating bobbin B or package P within a predetermined width.

In addition, in order to make it easy to visually recognize the traverse guide 112 in the background of the winding drum 22, the traverse guide 112 is preferably different in color from the winding drum 22. For example, when the outer peripheral surface of the winding drum 22 is black, the traverse guide 112 may be white. This makes it easy for an operator or the like to visually recognize the traverse guide 112 that reciprocates.

The traverse cover 23 is disposed on the winding drum 22 side with respect to a yarn path through which the yarn Y wound into the package P passes. The traverse cover 23 extends in the reciprocating direction (the direction indicated by the arrow T) of the traverse guide 112, and covers the traverse mechanism 110 from above. The traverse cover 23 is provided across the plurality of spinning units 2 and is shared by the plurality of spinning units 2. The traverse cover 23 prevents foreign matter such as wax falling from above from adhering to the traverse mechanism 110.

The traverse cover 23 has at least an upper side cover portion 23a and a yarn path side cover portion 23 b. The upper cover 23a is a plate-like member covering the upper part of the traverse mechanism 110. The yarn path side cover 23b extends downward from the yarn path side end of the yarn Y of the upper cover 23 a. The yarn path side cover 23b is a plate-like member that covers the upper side portion of the traverse mechanism 110 from the yarn path side of the yarn Y. In the present embodiment, the yarn path side cover portion 23b covers a portion of the traverse mechanism 110 where the traverse shaft 111 is provided from the yarn path side of the yarn Y.

The end face drop prevention carrier 100 includes a fixed portion 101, a pair of range restricting portions 102, and a carrier cover 103. The fixing portion 101 is overlapped on the upper surface of the upper lid portion 23a and fixed to the traverse cover 23 by a screw 23 c. The fixing portion 101 is provided with a screw hole 101a through which the screw 23c passes.

The threaded hole 101a is a long hole extending in the reciprocating direction of the traverse guide 112. This allows adjustment of the fixing position of the fixing portion 101 to the upper cover portion 23 a. The width of the screw hole 101a (the width of the elongated hole in the direction perpendicular to the longitudinal direction) is slightly larger than the diameter of the screw portion of the screw 23 c. Therefore, the fine adjustment of the fixing position of the fixing portion 101 in the width direction of the screw hole 101a can be performed by the clearance between the screw portion of the screw 23c and the screw hole 101 a.

The pair of range regulating sections 102 are arranged so as to sandwich the traverse range of the yarn Y when traversed by the traverse mechanism 110, and regulate the movement range of the yarn Y in the traverse direction. The range regulating section 102 prevents the yarn Y from moving beyond the end of the package P and from dropping off from the end of the package P. The range regulating portion 102 extends from the end of the fixing portion 101 toward the yarn path side of the yarn Y and then extends downward. That is, the range regulating section 102 is fixed to the traverse cover 23 via the fixing section 101, extends from the traverse cover 23 to the yarn path side of the yarn Y, and then extends to the lower side.

The guide cover 103 is a plate-like member extending across the entire movement range of the traverse guide 112 in the reciprocating direction (the direction indicated by the arrow T) of the traverse guide 112. The guide cover 103 faces the traverse guide 112, and covers the traverse guide 112 from the yarn path side of the yarn Y. The carrier cover 103 is provided on the side of the yarn path of the yarn Y during winding in the moving direction of the package P when lifted (hereinafter referred to as the lift direction). Both end portions of the carrier cover 103 are connected to lower end portions of the pair of range regulating portions 102, respectively.

The carrier cover 103 is provided with a slit 103c extending in the vertical direction. That is, when viewed in the direction from the yarn guide cover 103 toward the traverse guide 112, the slit 103c extends in a direction intersecting (orthogonal to) the direction in which the traverse guide 112 reciprocates. The slit 103c penetrates the yarn guide cover 103 in a direction from the yarn guide cover 103 to traverse the yarn guide 112. The direction from the yarn carrier cover 103 to traverse the yarn carrier 112 corresponds to the direction opposite to the lifting direction. The slit 103c becomes a passage when the yarn Y passes through the carrier cover 103. The yarn Y can linearly move from the front side (the side opposite to the side facing the traverse guide 112) to the back side (the side facing the traverse guide 112) of the guide cover 103 through the slit 103 c. The yarn Y can also move linearly from the back side to the front side of the carrier cover 103 through the slit 103 c.

In the carrier cover 103, an upper end is referred to as an upper end 103a, and a lower end is referred to as a lower end 103 b. An upstream end edge of the upper end portion 103a on the upstream side in the moving direction of the yarn Y wound into the package P is referred to as an upstream end edge 103 ae. Similarly, the downstream end edge of the lower end portion 103b in the moving direction of the yarn Y wound into the package P is referred to as a downstream end edge 103 be. That is, in the present embodiment, the upstream end edge 103ae is an upper end edge (upper end) of the carrier cover 103, and the downstream end edge 103be is a lower end edge (lower end) of the carrier cover 103.

The slit 103c is provided across from the upstream-side end edge 103ae to the downstream-side end edge 103 be. In order to prevent the yarn Y from being caught, a corner portion between the upstream-side end edge 103ae of the carrier cover 103 and the wall portion of the slit 103c is rounded. Also, a corner portion between the downstream-side end edge 103be of the yarn carrier cover 103 and the wall portion of the slit 103c is rounded.

The width W1 (see fig. 3) of the slit 103c is less than 20 mm. The width W1 of the slit 103c is preferably 13mm or less, more preferably 11mm or less, and in the present embodiment 11 mm. In the present embodiment, the slit 103c is provided at the center of the traverse range of the yarn Y traversed by the traverse guide 112 in the reciprocating direction of the traverse guide 112. The width W1 of the slit 103c is the dimension in the reciprocating direction of the traverse guide 112.

As shown in fig. 4, when viewed along a perpendicular line L perpendicular to the surface of the yarn Y on the yarn path side in the yarn path side cover portion 23b, the upper end portion 103a of the yarn guide cover 103 overlaps the lower end portion 23d of the yarn path side cover portion 23 b. The shortest distance W2 between the upstream-side end edge 103ae of the carrier cover 103 and the yarn-path-side surface of the yarn Y in the yarn-path-side cover portion 23b is 6mm or less.

In a state where the yarn Y is wound around the package P, the yarn Y traverses in the direction of the perpendicular line L between the yarn guide cover 103 and the yarn path side cover portion 23 b. That is, in a state where the yarn Y is normally wound around the package P, the yarn Y does not contact with either the carrier cover 103 or the yarn path side cover 23 b.

As shown in fig. 3, the downstream end edge 103be of the yarn carrier cover 103 is inclined toward the upstream side (upper side) in the moving direction of the yarn Y as it approaches the slit 103 c.

Next, the state of the yarn Y when the package P is lifted will be described. As shown in fig. 5, in order to cut off the transmission of the driving force from the winding drum 22, the package P is slightly separated from the winding drum 22, and the package P is lifted. The yarn Y moves to a side away from the traverse guide 112 in accordance with the movement of the package P. At this time, since the carrier cover 103 is provided in the raising direction, the upstream end edge 103ae of the carrier cover 103 abuts on the yarn Y, and the movement of the yarn Y to the side away from the traverse guide 112 is restricted. Since the movement of the yarn Y is restricted by the upstream-side end edge 103ae, the state in which the yarn Y is engaged with the guide portion 112a is maintained. Alternatively, even if the yarn Y is separated from the guide section 112a, the yarn Y is caught by the guide section 112a because the traverse guide 112 reciprocates. Therefore, after the package P is lifted, the traverse of the yarn Y by the traverse mechanism 110 is continued while the yarn Y slides on the upstream-side end edge 103 ae.

Next, a structure in which the yarn Y moves to the traverse mechanism 110 side through the slit 103c of the guide cover 103 will be described. For example, when a yarn break occurs, the package P is moved farther from the winding drum 22 than when lifted, and the yarn end on the package P side and the yarn end on the upstream side are spliced by the splicing cart 3. After the yarn Y is spliced, the package P is pressed against the winding drum 22 again. At this time, as shown in fig. 6, the yarn Y connected to the package P is pushed from the yarn accumulating device 11 to the downstream end edge 103be of the yarn guide cover 103. Since the downstream end edge 103be is inclined toward the slit 103c, the yarn Y pressed against the downstream end edge 103be moves toward the slit 103c due to the inclination of the downstream end edge 103 be. The yarn having passed through the slit 103c is traversed by being engaged with the guide portion 112a of the traverse guide 112.

Further, the lower end portion 103b of the guide cover 103 is bent to a side away from the traverse guide 112. Therefore, as shown in fig. 6, the yarn Y can be actively brought into contact with the downstream end edge 103be of the carrier cover 103.

Details of the width W1 of the slit 103c will be described with reference to fig. 7. In the description of the width W1 of the slit 103c, the positional relationship will be described with the right side and the left side of the winding drum 22 as "right" and "left" respectively, when the winding drum 22 is viewed from the side of the package P, with the traverse cover 23 side of the winding drum 22 being "up". In the carrier cover 103, a portion on the left side of the slit 103c is a left carrier cover portion (1 st carrier cover portion) 103L, and a portion on the right side of the slit 103c is a right carrier cover portion (2 nd carrier cover portion) 103R. The tip end of the left yarn guide cover 103L on the side of the slit 103c is referred to as a left tip end Ls, and the tip end of the right yarn guide cover 103R on the side of the slit 103c is referred to as a right tip end Rs. The guide cover 103 has 2 portions (a left-side guide cover 103L and a right-side guide cover 103R) separated from each other in the reciprocating direction of the traverse guide 112 with a slit 103c therebetween.

In the present embodiment, a drum rubber 22b is wound around a part of the drum body 22a of the take-up drum 22. The roller rubber 22b is embedded in a groove provided on the surface of the roller body portion 22 a. The roller body 22a is made of resin, and the roller rubber 22b is made of rubber having a higher friction coefficient than the roller body 22 a. The height of the surface of the roller rubber 22b is higher than the height of the surface of the roller body 22 a. The roller rubber 22b is provided on the left side of the center position in the left-right direction of the roller body 22 a. By providing the drum rubber 22b in a part of the drum body 22a that rotates the package P in this way, the rotational force can be efficiently transmitted to the package P. Therefore, the rotation speed of the package P can be increased immediately after the splicing by the splicing cart 3.

A left groove ML can be generated between the left end of the drum rubber 22b and the drum main body 22 a. Similarly, a right groove MR can be generated between the right end of the roller rubber 22b and the roller body 22 a. The left-side groove ML and the right-side groove MR are gaps that can be generated at the joints of different members, and are narrow-width grooves. The left-side groove ML and the right-side groove MR extend in the circumferential direction of the drum main body portion 22 a.

In the present embodiment, the right groove MR out of the left groove ML and the right groove MR is close to the center position YC of the yarn path of the yarn Y. The center position YC of the yarn path of the yarn Y is a position of a straight line passing through the position of the yarn carrier of the yarn Y located closest to the upstream side of the winding device 13 and orthogonal to the rotation axis K of the winding drum 22 when the winding drum 22 is viewed from the package P side. In the present embodiment, the center position YC of the yarn path of the yarn Y is located at the center of the slit 103c in the width direction (the direction of the width W1). However, the center position YC of the yarn path of the yarn Y is not limited to being located at the center of the slit 103c, and the center position YC may be displaced from the center position of the slit 103c or may be located outside the slit 103 c. Further, the center position of the drum body 22a in the left-right direction (hereinafter referred to as the drum center) may be located in the gap 103 c. In this case, the roller center is preferably shifted from the center of the slit 103 c. However, the roller center may be aligned with the center of the slit 103c, or the roller center may be located outside the slit 103 c.

When the package P is pressed against the winding drum 22 after the splicing or the like is performed (the state shown in fig. 6), the yarn Y is wound around the package P and naturally moves toward the slit 103c due to the inclination of the downstream end edge 103 be. At this time, although the groove widths of the left-side groove ML and the right-side groove MR are very narrow, since the yarn Y is not traversed by the traverse mechanism 110, it can be considered that the yarn Y is caught in the left-side groove ML or the right-side groove MR. For example, when the yarn Y is caught in the left groove ML or the right groove MR, the yarn Y is continuously wound at the same position where the package P is wound in the left-right direction, and is wound only in the thick (band winding) state at that position.

However, in the present embodiment, the left side groove ML is farther from the center position YC of the yarn path of the yarn Y than the right side groove MR. That is, when the yarn Y moves toward the slit 103c due to the inclination of the downstream end edge 103be of the left yarn guide cover 103L, the yarn Y passes through the left groove ML in a state where the yarn path of the yarn Y is inclined with respect to the left groove ML at the contact portion between the package P and the winding drum 22. Therefore, the yarn Y does not catch in the left groove ML even in a state of not being traversed by the traverse mechanism 110.

On the other hand, when the winding drum 22 is viewed from the package P side, the right groove MR near the center position YC of the yarn path of the yarn Y extends in the same direction as the right groove MR. Therefore, for example, in a state where the yarn Y is not traversed by the traverse mechanism 110, the yarn Y cannot pass through the left groove ML and be caught by the left groove ML at a portion where the package P contacts the winding drum 22. Therefore, in the present embodiment, the width W1 of the slit 103c and the positions of the slit 103c (the positions of the left tip end portion Ls and the right tip end portion Rs) are set in accordance with the right groove MR.

As described above, in a state where the yarn Y is not traversed by the traverse mechanism 110, the yarn Y cannot pass through the right-side groove MR. That is, the yarn Y cannot pass through the right groove MR in a state where the yarn Y slides on the downstream side end edge 103be of the left side carrier cover 103L or the downstream side end edge 103be of the right side carrier cover 103R and moves to the slit 103 c. In a state where the yarn Y is traversed by the traverse mechanism 110, the yarn Y passes through the right groove MR in a state where the yarn Y enters the guide portion 112a, and therefore the yarn Y does not catch on the right groove MR. Therefore, the slit 103c is provided specifically as follows: when the winding roller 22 is viewed from the side of the package P, the right groove MR is positioned in the slit 103 c. Therefore, the yarn Y does not pass through the right groove MR in a state of sliding on the downstream side end edge 103be of the left side carrier cover 103L or the downstream side end edge 103be of the right side carrier cover 103R. The yarn Y is in a state of being traversed by the traverse mechanism 110 while passing through the right groove MR.

That is, the position of the left-side tip portion Ls of the left yarn guide cover 103L and the position of the right-side tip portion Rs of the right yarn guide cover 103R are set so that the left yarn guide cover 103L and the right yarn guide cover 103R do not overlap the right groove MR.

The yarn splicing cart 3 of the present embodiment includes a yarn guide 31 (see fig. 8) that restricts the position of the yarn Y in the left-right direction when splicing the yarn Y drawn from the package P. The yarn guide bar 31 restricts the position of the yarn Y in the left-right direction by sandwiching the yarn Y from the left-right direction. As shown in fig. 8, a position of a straight line passing through a position where the yarn Y is sandwiched between the yarn guides 31 when the winding drum 22 is viewed from the package P side and orthogonal to the rotation axis K of the winding drum 22 is set as the reference position YT of the yarn path of the yarn Y sandwiched between the yarn guides 31. The reference position YT may also be offset from the drum center.

After the yarn splicing, the yarn guide bar 31 releases the nipping of the yarn Y while the package P is in contact with the winding drum 22. Thus, the yarn guide bar 31 defines the path of the yarn Y when the package P contacts the winding drum 22. Thus, after the yarn splicing is performed, the package P is brought into contact with the winding drum 22 in a state where the yarn Y is nipped by the yarn guide 31, and at the same time, the yarn Y is nipped by the yarn guide 31 and winding of the yarn Y (rotation of the package P) is restarted.

When the yarn Y is released from being gripped by the yarn guide 31, the yarn Y may be caught in the right groove MR depending on the position (position in the left-right direction) at which the yarn Y is wound onto the package P. In this case, too large a band-like winding occurs in the right groove MR as described above. Therefore, in order to prevent the yarn Y from hooking into the right groove MR when the yarn Y is released from being held by the yarn guide 31, the distance W3 in the left-right direction between the reference position YT of the yarn path of the yarn Y held by the yarn guide 31 and the right groove MR is secured to be 5mm or more. By separating the reference position YT from the right groove MR by 5mm or more, when the package P is brought into contact with the winding drum 22 and the yarn Y is released from the grip of the yarn guide 31, a small amount (allowable size) of tape winding is formed at a position separated from the right groove MR. Therefore, the yarn Y does not hook in the right groove MR, and an excessive band winding is not formed in the right groove MR.

In the example shown in fig. 8, the reference position YT is set to the right side of the right groove MR, but the reference position YT may be set to the left side of the right groove MR as long as the right groove MR is separated from the reference position YT by 5mm or more.

In addition, the position of the left-side distal end portion Ls of the left-side carrier cover portion 103L and the position of the right-side distal end portion Rs of the right-side carrier cover portion 103R are set so that neither of the left-side carrier cover portion 103L and the right-side carrier cover portion 103R overlaps the reference position YT of the yarn path of the yarn Y held by the yarn guide bar 31. Thus, when the package P contacts the winding drum 22, the yarn Y can pass through the slit 103c satisfactorily (a satisfactory yarn entering performance can be ensured).

As described above, the conditions for determining the width W1 of the slit 103c and the position of the slit 103c need to satisfy the following conditions (1) to (3). (1) Either one of the left and right carrier covers 103L and 103R does not overlap the right groove MR. (2) The reference position YT is 5mm or more away from the right groove MR. (3) Neither the left side carrier cover part 103L nor the right side carrier cover part 103R overlaps the reference position YT.

A description will be given of a position of the slit 103c and a minimum value of the width W1 of the slit 103c in a case where the reference position YT of the yarn path of the yarn Y held by the yarn guide 31 is set on the right side of the right groove MR (the state of fig. 8). When the width W1 of the slit 103c is minimized, the left side tip portion Ls of the left side yarn guide cover 103L coincides with the right side groove MR in the left-right direction, the reference position YT is set at a position 5mm away from the right side of the right side groove MR, and the right side tip portion Rs of the right side yarn guide cover 103R coincides with the reference position YT. That is, the minimum value of the width W1 of the slit 103c is 5 mm. In the present embodiment, the width W1 of the slit 103c is set to 11mm in consideration of assembly variation of the respective parts. Also, the width W1 as the slit 103c may be less than 20mm due to assembly variation or the like.

On the other hand, the position of the slit 103c and the minimum value of the width W1 of the slit 103c when the reference position YT of the yarn path of the yarn Y held by the yarn guide 31 is set to the left side of the right groove MR will be described. Similarly to the above, when the width W1 of the slit 103c is the minimum, the right side tip portion Rs of the right side yarn guide cover portion 103R coincides with the right side groove MR in the left-right direction, the reference position YT is set at a position 5mm away from the left side of the right side groove MR, and the left side tip portion Ls of the left side yarn guide cover portion 103L coincides with the reference position YT. That is, the minimum value of the width W1 of the slit 103c is 5 mm. In the present embodiment, the width W1 of the slit 103c is set to 11mm in consideration of assembly variation of the respective parts. Also, the width W1 as the slit 103c may be less than 20mm due to assembly variation or the like.

In the present embodiment, the width W1 of the slit 103c provided in the carrier cover 103 in the winding device 13 is less than 20 mm. Therefore, the yarn Y is less likely to pass through the slit 103c when the package P is lifted, as compared with the case where the width W1 of the slit 103c is 20mm or more. This can prevent the yarn from being separated from the carrier cover 103 that restricts the movement of the yarn Y when the package P is lifted.

When the width W1 of the slit 103c is set to 13mm or less, the yarn Y is less likely to pass through the slit 103c when the package P is lifted. This can further suppress the yarn from being separated from the carrier cover 103 when the package P is lifted. The width of the slit 103c is 5mm or more.

When the package P is pulled away from the winding drum 22 due to yarn breakage, the yarn Y is separated from the traverse guide 112 and is separated from the guide cover 103 through the slit 103 c. Even if the package P is pulled away from the winding drum 22, the package P continues to rotate for a while by inertia, and thus the yarn Y is completely wound up to the yarn end. Therefore, the yarn end is stuck to the surface of the package P. The yarn Y is wound around the package P at a position where the yarn Y is separated from the carrier cover 103 in the axial direction of the package P. The yarn end stuck to the surface of the package P is caught by the yarn splicing cart 3, and the yarn splicing is performed.

In this case, by setting the width W1 of the slit 103c to be smaller than 20mm, the position of the yarn Y when completely wound into the package P is easily stabilized, as compared with the case where the width W1 is 20mm or more. In particular, when the width W1 of the slit 103c is set to 13mm or less, the position of the yarn Y when completely wound on the package P can be easily stabilized. Since the position of the yarn end in the package P is stable in this manner, the yarn end can be easily caught by the yarn splicing cart 3 from the package P.

In the winding device 13, the shortest distance between the upstream-side end edge 103ae of the yarn guide cover 103 and the surface of the yarn path side cover portion 23b of the traverse cover 23 is 6mm or less. Therefore, even when foreign matter such as a screw falls, it is possible to prevent the foreign matter from entering the traverse mechanism 110 side from between the upstream end edge 103ae of the yarn guide cover 103 and the yarn path side cover portion 23 b. Also, the width W1 of the slit 103c of the yarn guide cover 103 is less than 20 mm. Therefore, the foreign matter can be prevented from entering the traverse mechanism 110 side through the slit 103c of the yarn guide cover 103. When the width W1 of the slit 103c is set to 13mm or less, it is possible to further suppress foreign matter from entering the traverse mechanism 110 side through the slit 103 c.

The carrier cover 103 is connected to a lower end portion of the range limiting portion 102. In this case, since the range regulating portion 102 also serves as a mechanism for attaching the carrier cover 103, a mechanism for fixing the carrier cover 103 does not need to be separately provided, and the structure of the winding device 13 is simplified.

The downstream side end edge 103be of the yarn carrier cover 103 is inclined upward toward the slit 103 c. For example, when the package P is pressed against the winding drum 22 again after the yarn is cut and the yarn is pieced, the yarn Y abuts against the downstream end edge 103be of the carrier cover 103. The downstream end edge 103be with which the yarn Y abuts is inclined, so that the yarn Y slides more easily toward the slit 103 c. Thus, the winding device 13 can easily move the yarn Y to the traverse mechanism 110 side through the slit 103c of the carrier cover 103.

The spinning unit 2 includes a draft device 6 for supplying a yarn, a rotor spinning machine 7, and a winding device 13. The spinning machine 1 includes a plurality of spinning units 2. In this way, the yarn Y can be prevented from being separated from the carrier cover 103 when the package P is lifted in the spinning unit 2 and the spinning machine 1.

By setting the width W1 of the slit 103c and the position of the slit 103c so as to satisfy the above conditions (1) to (3), it is possible to suppress the increase in the band winding of the package P and to pass the yarn Y through the slit 103c of the carrier cover 103 well when the package P is brought into contact with the winding drum 22.

Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. For example, as shown in fig. 4, the case where the upper end portion 103a of the yarn carrier cover 103 overlaps the lower end portion 23d of the yarn path side cover portion 23b when viewed along the direction of the perpendicular line L has been described as an example, but the present invention is not limited thereto. For example, the position of the upstream-side end edge 103ae of the carrier cover 103 may be matched with the position of the lower-end edge (lower end) 23be of the yarn path side cover portion 23b when viewed in the direction of the perpendicular line L.

In the embodiment, the drum rubber 22b is provided at a position shifted to the left side from the center position in the left-right direction of the drum body 22a, but may be provided at a position shifted to the right side. Thus, when the left groove ML between the left end of the drum rubber 22b and the drum body 22a is in a state close to the center position YC of the yarn path of the yarn Y, each part may be set so that the above conditions (1) to (3) are satisfied for the left groove ML instead of the right groove MR.

Further, the left side groove ML and the right side groove MR may not be generated between the end portion of the roller rubber 22b and the roller body portion 22 a. In this case, the yarn Y is hooked in the stepped portion of the drum rubber 22b and the drum body 22a instead of the left-side groove ML and the right-side groove MR. The height of the surface of the roller rubber 22b may be the same as the height of the surface of the roller body 22a (the same plane). In this case, the yarn Y is caught in the left groove ML or the right groove MR which can be generated between the end of the drum rubber 22b and the drum body 22 a.

The traverse mechanism 110 is not limited to a configuration in which the traverse guide 112 is reciprocated by the traverse shaft 111. As long as the traverse mechanism 110 is configured to reciprocate the traverse guide 112, a driving section other than the traverse shaft 111 may be used.

In the spinning unit 2, the devices are arranged such that the yarn Y supplied from the upper side is wound on the lower side in the body height direction, but the devices may be arranged such that the yarn Y supplied from the lower side is wound on the upper side. In fig. 1, the spinning machine 1 is illustrated as winding a cylindrical package P, but a conical package P may be wound.

In the spinning unit 2, the yarn accumulating device 11 has a function of drawing the yarn Y from the rotor spinning machine 7, but the yarn Y may be drawn from the rotor spinning machine 7 by a feed roller and a pinch roller. When the yarn Y is drawn out from the rotor spinning machine 7 by the delivery roller and the pinch roller, a slack eliminating tube or a mechanical compensating device for absorbing slack of the yarn Y by the suction airflow may be provided instead of the yarn accumulating device 11.

The tension sensor 9 may be disposed upstream of the yarn monitoring device 8 in the traveling direction of the yarn Y. The unit controller 10 may be provided for each spinning unit 2. In the spinning unit 2, the waxing device 12, the tension sensor 9, and the yarn monitoring device 8 may be omitted.

The present invention is not limited to the spinning machine 1, and can be applied to a free end spinning machine, an automatic winder, and other yarn winding machines.

Claims

1. A winding device for winding a supplied yarn onto a package while traversing the yarn, comprising:

a winding roller that presses the package against a surface and rotates the pressed package,

a traverse mechanism including a traverse guide arranged on the winding drum side with respect to a yarn path through which the yarn wound into the package passes and engaged with the yarn, and a driving section for reciprocating the traverse guide in a direction of a rotation axis of the winding drum, and

a traverse guide cover that faces the traverse guide across the yarn path, extends across the entire range of movement of the traverse guide in the direction of reciprocation of the traverse guide, and covers the traverse guide that reciprocates from the yarn path side;

the yarn guide cover has a slit extending in a direction intersecting with a reciprocating direction of the traverse guide when viewed from the yarn guide cover toward the traverse guide;

the slit penetrates the yarn guide cover in a direction from the yarn guide cover to the traverse guide;

the size of the slit in the direction in which the traverse guide reciprocates, that is, the width thereof is less than 20 mm.

2. The winding apparatus according to claim 1, wherein the width of the slit is 13mm or less.

3. The winding apparatus according to claim 1, wherein the width of the slit is 5mm or more.

4. The winding apparatus according to claim 2, wherein the width of the slit is 5mm or more.

5. The winding apparatus according to claim 1, further comprising a traverse cover disposed on the winding drum side of the yarn path, extending in the traverse direction of the traverse guide, and covering the traverse mechanism from above;

the traverse cover has an upper side cover part covering the upper part of the traverse mechanism and a yarn path side cover part extending downwards from the end part of the upper side cover part on the yarn path side and covering the yarn path side of the traverse mechanism;

the yarn channel side cover part is a plate-shaped component;

a position of an upper end of the yarn carrier cover coincides with a position of a lower end of the yarn path side cover or an upper end of the yarn carrier cover overlaps with a lower end of the yarn path side cover when viewed along a perpendicular direction orthogonal to a surface of the yarn path side cover on the yarn path side;

the shortest distance between the upper end of the yarn guide cover and the surface of the yarn path side cover part on the yarn path side is less than or equal to 6 mm.

6. The winding apparatus according to claim 2, further comprising a traverse cover disposed on the winding drum side of the yarn path, extending in the traverse direction of the traverse guide, and covering the traverse mechanism from above;

the yarn channel side cover part is a plate-shaped component;

7. The winding apparatus according to claim 3, further comprising a traverse cover disposed on the winding drum side of the yarn path, extending in the traverse direction of the traverse guide, and covering the traverse mechanism from above;

the yarn channel side cover part is a plate-shaped component;

8. The winding apparatus according to claim 4, further comprising a traverse cover disposed on the winding drum side of the yarn path, extending in the traverse direction of the traverse guide, and covering the traverse mechanism from above;

the yarn channel side cover part is a plate-shaped component;

9. The winding device according to claim 5, further comprising a range regulating section fixed to the traverse cover, extending from the traverse cover to the yarn path side, and then extending to a lower side, and regulating a moving range of the yarn in a reciprocating direction of the traverse guide;

the yarn carrier cover is connected to a tip portion of the yarn carrier cover on a lower side of the range limiting portion.

10. The winding device according to claim 6, further comprising a range regulating section fixed to the traverse cover, extending from the traverse cover to the yarn path side, and then extending to a lower side, and regulating a moving range of the yarn in a reciprocating direction of the traverse guide;

11. The winding device according to claim 7, further comprising a range regulating section fixed to the traverse cover, extending from the traverse cover to the yarn path side, and then extending to a lower side, and regulating a moving range of the yarn in a reciprocating direction of the traverse guide;

12. The winding device according to claim 8, further comprising a range regulating section fixed to the traverse cover, extending from the traverse cover to the yarn path side, and then extending to a lower side, and regulating a moving range of the yarn in a reciprocating direction of the traverse guide;

13. The winding-up device according to any one of claims 1 to 12, wherein an end edge on a downstream side in a moving direction of the yarn wound up to the package, of end edges of the yarn guide cover, is inclined toward an upstream side in the moving direction of the yarn as it approaches the slit.

14. The winding apparatus according to any one of claims 1 to 12, further comprising:

a package support portion for supporting the package, and

and a moving mechanism that moves the package support portion between a contact position where the package contacts the winding drum, a lifted position where the package is separated from the winding drum, and a retracted position where the package is farther from the winding drum than the lifted position.

15. The winding apparatus according to claim 13, further comprising:

a package support portion for supporting the package, and

16. A yarn winding unit is provided with:

a yarn supply part for supplying a yarn, and

a take-up device as claimed in any one of claims 1 to 15.

17. A yarn winding machine comprising a plurality of yarn winding units according to claim 16.

18. The yarn winding machine according to claim 17, wherein the yarn supplying section includes a draft device that drafts the fiber bundle and an air-jet spinning device that twists the fiber bundle drafted by the draft device by a whirling air flow to generate the yarn;

a yarn accumulating device provided between the air-jet spinning device and the winding device and accumulating the yarn, the yarn accumulating device supplying the yarn to the winding device;

the driving section is a traverse shaft extending in the arrangement direction of the plurality of yarn winding units and mounting the traverse guides of the plurality of yarn winding units;

the traverse guides of the yarn winding units are driven to reciprocate in the direction of the rotation axis of the winding drum by the traverse shaft, and reciprocate together.