CN115611089A - Yarn winding unit and yarn winding method - Google Patents

Abstract

The present invention relates to a yarn winding unit and a yarn winding method. A control unit (90) of the winder unit (10) controls the rotation of the yarn poking guide (80) so that the yarn poking guide (80) is positioned at a standby position (P1), a avoiding position (P2) at which the lower yarn (20 a) is guided into the passage path of the lower yarn (20 a) while avoiding the passage path of the shielding part (50) of the lower yarn guide tube (25), and a carrying position (P3) at which the lower yarn (20 a) is present on the passage path.

Description

Yarn winding unit and yarn winding method

Technical Field

The present invention relates to a yarn winding unit and a yarn winding method.

Background

As a yarn feeding device in a textile machine, for example, a device provided with a yarn nipping tube for feeding a yarn end portion of lower yarns to be spliced by using intake air is known as described in japanese patent application laid-open No. 8-040640.

The device has a feed hook (take-off mechanism) which traverses the tension path of the other yarn as it rotates, takes off the yarn, and positions it at the splicing device in a terminal position. The yarn feeding hook is arranged on the front plate of the shielding piece, and the shielding piece is arranged at the end part of the yarn clamping pipe. Further, a yarn guide device for catching the lower yarn is provided between the yarn feeding hook and the rotary shaft of the shutter on the front plate.

In the above-described conventional apparatus, the lower yarn is fed to the splicing device by rotation of the yarn nipping tube. However, in this device, the structure for taking off the lower yarn has to be complicated.

Disclosure of Invention

The invention aims to provide a yarn winding unit and a yarn winding method which can lift a lower yarn as a first yarn without complicating the structure of a device.

A yarn winding unit according to an aspect of the present invention includes: a yarn supplying bobbin holding section for holding a yarn supplying bobbin; a magazine type storage device having a bobbin storage device for storing the yarn feeding bobbin, and configured to drop the yarn feeding bobbin from the bobbin storage device and supply the yarn feeding bobbin to the yarn feeding bobbin holding section; a winding device that winds the yarn unwound from the yarn supply bobbin to form a package; a yarn splicing device for splicing a first yarn on the yarn feeding bobbin side and a second yarn on the package side; a first yarn guide pipe which is vertically rotatable around a first rotation axis above the yarn feeding bobbin holding section; a yarn pulling guide which is arranged at a height between the first rotating shaft and the yarn feeding bobbin holding section, and which hooks and moves the first yarn stretched between the yarn feeding bobbin held by the yarn feeding bobbin holding section and the bobbin storage device by rotating about the second rotating shaft; and a control unit that controls the rotation of the yarn poking guide so that the yarn poking guide is positioned at a standby position where the yarn feeding bobbin is on standby until the yarn feeding bobbin is fed to the yarn feeding bobbin holding unit, at an avoidance position where the first yarn is guided into the first yarn while avoiding the passage of the tip end of the first yarn guide pipe, and at a carrying position where the first yarn is present on the passage.

According to this yarn winding unit, the control unit controls the rotation of the yarn pushing guide so that the yarn pushing guide is positioned at the standby position, the avoiding position, and the carrying-away position. At the avoidance position, the first yarn is introduced so as to avoid the passage of the leading end of the first yarn guide pipe. Therefore, when the first yarn guide pipe is rotated downward, a positional relationship in which the tip end portion of the first yarn guide pipe passes laterally of the first yarn is established. At the carrying-away position, the first yarn is present on a passage path of the tip portion of the first yarn guide pipe, and therefore, when the first yarn guide pipe is rotated upward, the first yarn is engaged with the tip portion and carried away. In the conventional apparatus, the yarn pull guide is a member that can be provided to catch the first yarn and cut by the cutter. With this conventional member, the position of the first yarn is controlled, and the first yarn can be lifted up by the first yarn guide pipe. Unlike the conventional device described above, the device structure is not complicated. The first yarn can be more stably guided to the yarn splicing device than in the case of catching the first yarn cut by the cutter.

In the yarn winding unit, the first rotating shaft of the first yarn guide pipe may be provided in the main body portion of the yarn winding unit, and the second rotating shaft of the yarn poking guide may be located closer to the main body portion than the center axis of the bobbin storage device. According to this structure, both the first turning shaft and the second turning shaft are located on the main body portion side, and therefore the space on the side opposite to the main body portion is not occupied by these devices. This is advantageous in terms of the layout (or space utilization) of the entire cell.

In the yarn winding unit, the bobbin storage device may include a cylindrical storage section that stores the yarn supplying bobbin, and the first yarn hooked on the yarn hooking guide may be located in the storage section while the yarn hooking guide is located at the avoiding position or the carrying away position. According to this configuration, the first yarn is positioned in the slit formed in the bobbin storage device while the rotation of the yarn poking guide is controlled, and therefore the posture of the first yarn is stabilized.

In the yarn winding unit, the rotation angle from the standby position around the second rotation axis to the avoidance position may be less than 120 °. According to this structure, it is sufficient that the rotation range of the thread pulling guide is only slightly enlarged from the conventional rotation range (in the case where the cutter is used). A small change in control is sufficient and, in addition, little modification is required in the construction of the device.

The control unit controls the rotation of the yarn poking guide so that the yarn poking guide is positioned at a start end as a standby position, a terminal end as an avoidance position, and an intermediate position as a carrying-away position between the start end and the terminal end.

A yarn winding method according to another aspect of the present invention is a yarn winding method in a yarn winding unit that winds a yarn unwound from a yarn supplying bobbin holding section that holds a yarn supplying bobbin to form a package, the yarn winding unit including: a magazine type storage device having a bobbin storage device for storing a yarn feeding bobbin; a yarn splicing device for splicing the first yarn on the yarn feeding bobbin side and the second yarn on the package side; a first yarn guide pipe capable of rotating up and down around a first rotating shaft above the yarn feeding bobbin holding part; and a yarn hooking guide arranged at a height between the first rotating shaft and the yarn feeding bobbin holding section and configured to hook the first yarn by rotating about the second rotating shaft, the yarn winding method including: a bobbin supplying step of dropping the yarn feeding bobbin from the bobbin storage device by using the magazine type storage device and supplying the yarn feeding bobbin to the yarn feeding bobbin holding section; and a yarn poking step of hooking the first yarn stretched between the yarn feeding bobbin held by the yarn feeding bobbin holding section and the bobbin storage device by a yarn poking guide, wherein in the yarn poking step, the yarn poking guide is rotated from a standby position at which the yarn feeding bobbin is standby until the yarn feeding bobbin is supplied to the yarn feeding bobbin holding section to an avoidance position at which the first yarn is introduced into the first yarn while avoiding a passage path of the tip end portion of the first yarn guide pipe, the first yarn guide pipe is rotated downward while the tip end portion of the first yarn guide pipe passes by the side of the first yarn, and the yarn poking guide is rotated from the avoidance position to a carrying-away position at which the first yarn exists on the passage path.

This yarn winding method also provides the same operation and effect as those of the yarn winding unit.

According to the present invention, the first yarn can be lifted without complicating the device configuration.

Drawings

Fig. 1 is a side view of a yarn winding unit according to an embodiment of the present invention.

Fig. 2 is a side sectional view showing the yarn feeding bobbin holding section, the bobbin storage device, the first yarn guide pipe, and the yarn poking guide.

Fig. 3 is a perspective view showing the bobbin storage device, the first yarn guide pipe, and the yarn poking guide.

Fig. 4 is a side view showing a rotation range of the first yarn guide pipe.

Fig. 5 is a plan view showing a rotation range of the yarn poking guide.

Fig. 6 is a diagram showing the operation of the embodiment and the operation of the comparative example in relation to the operation of raising the first yarn.

Fig. 7 is a perspective view showing one configuration example of the tip end portion of the first yarn guide pipe.

Fig. 8 (a) is a diagram showing a state in which the yarn poking guide is located at the standby position.

Fig. 8 (b) is a diagram showing a state where the yarn pushing guide is located at the avoiding position.

Fig. 9 (a) is a diagram showing a state in which the yarn poking guide is removably present.

Fig. 9 (b) is a diagram showing a state in which the first yarn is lifted by the yarn poking guide.

Detailed Description

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

As shown in fig. 1 and 2, an automatic winder (yarn winding machine) 1 includes a plurality of winder units (yarn winding units) 10 arranged in a row. The winder unit 10 winds the spun yarn 20 unwound from the yarn supplying bobbin 21 around the winding bobbin 22 while traversing, and forms a package 30 having a predetermined shape. Each winder unit 10 includes a winding unit body 16. The winding unit main body 16 includes a main body portion 17, a magazine type storage device 60, a yarn poking guide 80, a winding device 31, and a yarn feeding bobbin holding portion 71. The yarn poking guide 80, the winding device 31, and the yarn feeding bobbin holding section 71 are attached to, for example, the main body section 17 of the winder unit 10.

As shown in fig. 1 to 3, the magazine type storage device 60 includes a magazine holding part 61 extending from a lower portion of the main body part 17 in the machine height direction to extend obliquely upward of the front surface of the winder unit 10, and a bobbin storage device 62 attached to a tip end of the magazine holding part 61. The bobbin storage device 62 includes a magazine pot (magazine can) 63, and the magazine pot 63 has an inclined central axis L3. The magazine pot 63 is provided with a plurality of cylindrical storage sections 64 in which the yarn feeding bobbin 70 can be placed. The plurality of storage parts 64 are arranged at equal intervals in the circumferential direction of the central axis L3 of the magazine pot 63, and each storage part 64 stores the yarn feeding bobbin 70.

As shown in fig. 2, the magazine type storage device 60 has a circular plate-shaped support plate 65 fixed to the magazine holding part 61. A notch 65a having a size corresponding to the size of one housing portion 64 is formed at one circumferential position on the support plate 65. The driving motor 60a is controlled by the control part 90, whereby the magazine pot 63 is intermittently rotationally driven. Since the magazine tank 63 is rotationally driven, the position of the notch 65a relatively moves with respect to the magazine tank 63, and the yarn feeding bobbin 70 coming to the position of the notch 65a among the yarn feeding bobbins 70 received in the magazine tank 63 falls down along the slide 67. The control section 90 intermittently rotates the magazine pot 63, and drops the yarn feeding bobbin 70 one by one from the magazine type storage device 60 to be supplied to the yarn feeding bobbin holding section 71.

Further, the magazine type storage device 60 has a thrum holding port 66, and the thrum holding port 66 is an upper end of a suction space formed along the central axis L3 inside the magazine can 63. A suction air flow is generated in the yarn end holding port 66 by a negative pressure source (not shown) connected to the magazine pot 63. When a new yarn supplying bobbin 70 is set in the storage section 64, the operator sucks the yarn end of the yarn supplying bobbin 70 to the yarn end holding opening 66. Thus, the lower yarn (first yarn) 20a can be caught by the lower yarn guide pipe (first yarn guide pipe) 25 described later by holding the yarn end in the yarn end holding port 66 in advance. The yarn supplying bobbin holding part 71 is located at the lower end of the slide 67. The yarn supplying bobbin 70 sliding down the slide 67 is held by the yarn supplying bobbin holding portion 71.

The winding device 31 winds the spun yarn 20 unwound from the yarn supplying bobbin 21 around the winding bobbin 22 to form a package 30. Specifically, the winding device 31 includes a cradle 23 that grips the winding tube 22, and a spool 24 that traverses the spun yarn 20 and drives the winding tube 22. The cradle 23 swings in a direction approaching or separating with respect to the drum 24. Thereby, the package 30 is contacted or separated with respect to the drum 24. The winding drum 24 disposed opposite to the winding bobbin 22 is rotationally driven, and the winding bobbin 22 is rotationally driven. The spun yarn 20 is wound around the rotating winding tube 22 while being traversed on the outer peripheral surface of the drum 24 by a helical traverse groove (not shown).

In the yarn running path between the yarn supplying bobbin 21 and the winding drum 24 in the winding unit main body 16, an unwinding assisting device 12, a tension applying device 13, a yarn splicing device 14, and a yarn clearer head 49 of the yarn monitoring device 15 are provided in this order from the yarn supplying bobbin 21 side.

The unwinding assisting device 12 assists the unwinding of the spun yarn 20 from the yarn supplying bobbin 21 by moving down the regulating member 40 covering the core tube of the yarn supplying bobbin 21 in conjunction with the unwinding of the spun yarn 20 from the yarn supplying bobbin 21. The regulating member 40 swings the spun yarn 20 unwound from the yarn supplying bobbin 21 to contact with a balloon formed on an upper portion of the yarn supplying bobbin 21, and applies an appropriate tension to the balloon to assist unwinding of the spun yarn 20.

The tension applying device 13 applies a predetermined tension to the running spun yarn 20. By applying a constant tension to the spun yarn 20 by the tension applying device 13, the quality of the package 30 can be improved.

The yarn monitoring device 15 detects a defect of the spun yarn 20 by detecting yarn unevenness (thickness unevenness) which is the quality of the spun yarn 20 with a sensor. The yarn clearer head 49 is provided with a first yarn unevenness detecting sensor 43 and a second yarn unevenness detecting sensor 44. The yarn defects such as slubs are detected using signals from the first yarn unevenness detecting sensor 43 and the second yarn unevenness detecting sensor 44. A cutter (not shown) for cutting the spun yarn 20 immediately when the yarn monitor 15 detects a yarn defect is attached near the yarn clearer head 49. The yarn monitoring device 15 can also function as a sensor for acquiring the traveling speed of the spun yarn 20.

The yarn splicing device 14 splices the lower yarn 20a on the yarn supply bobbin 21 side and the upper yarn (second yarn, not shown) on the package 30 side when the yarn monitoring device 15 detects a yarn defect and cuts the yarn or when the yarn is broken during unwinding from the yarn supply bobbin 21. The yarn splicing device 14 splices the lower yarn 20a stretched between the yarn feeding bobbin 21 held by the yarn feeding bobbin holding section 71 and the yarn end holding port 66 of the magazine pot 63 and the upper yarn on the package 30 side when a new yarn feeding bobbin 70 is supplied (bobbin replacement). At this time, the lower yarn 20a is engaged with the shielding portion 50 of the lower yarn guide pipe 25 and lifted in an uncut state. As the joint device 14, a mechanical device, a device using a fluid such as compressed air, or the like can be used.

A lower yarn guide pipe 25 that captures and guides the lower yarn on the yarn supplying bobbin 21 side and an upper yarn guide pipe 26 that captures and guides the upper yarn on the package 30 side are provided on the lower side and the upper side in the machine base height direction of the winder unit 10 with respect to the yarn splicing device 14. A suction port 32 is provided in a shielding portion (tip end portion) 50 of the lower yarn guide pipe 25. A suction nozzle 34 is provided at the tip of the upper yarn guide pipe 26. A suitable negative pressure source (not shown) is connected to each of the lower yarn guide pipe 25 and the upper yarn guide pipe 26, and a suction airflow can be applied to the suction port 32 and the suction nozzle 34. The negative pressure source used in the bobbin storage device 62 and the negative pressure source used in the lower yarn guide pipe 25 and the upper yarn guide pipe 26 may be shared or may be independent of each other.

When the yarn is broken or cut, the lower yarn guide pipe 25 is rotated downward to move to the catching standby position H3 (see fig. 4), and the shielding portion 50 that normally closes the suction port 32 is urged by the spring to open. The shielding portion 50 is rotatable about a rotation axis 53 (see fig. 7). Thereby, the suction port 32 is exposed, and the suction port 32 catches the lower yarn. At substantially the same time, the upper yarn guide pipe 26 rotates upward from the position shown in the figure around the rotation shaft 35, and the upper yarn unwound from the package 30 is caught by the suction nozzle 34. Next, the upper yarn guide pipe 26 is turned downward around the turning shaft 35, thereby guiding the upper yarn to the yarn splicing device 14. Thereafter, the lower yarn guide pipe 25 is rotated upward about a rotation shaft (first rotation shaft) 33, thereby guiding the lower yarn to the yarn splicing device 14. The piecing device 14 splices the guided lower yarn and the upper yarn. The catching of the lower yarn 20a when the yarn supplying bobbin 70 is supplied is different from the above description, and therefore, the following description will be made.

Next, the catching of the lower yarn 20a, which is stretched between the yarn supplying bobbin 21 held by the yarn supplying bobbin holding section 71 and the yarn end holding port 66 of the bobbin storage device 62, by the lower yarn guide pipe 25 will be described with reference to fig. 2 and 3.

As shown in fig. 2 and 3, the lower yarn guide pipe 25 is vertically rotatable around the rotation shaft 33 above the yarn supplying bobbin holding portion 71. The rotation axis L1 of the rotation shaft 33 extends, for example, in the horizontal direction (left-right direction). The axis of rotation L1 may also extend at some angle to the horizontal. The shade 50 of the lower yarn guide pipe 25 draws an arc-shaped trajectory (passage path) as it rotates (see also fig. 4). The yarn path of the spun yarn 20 unwound from the yarn supplying bobbin 21 and passing through the clearer head 49 is located on the same plane as the locus of the shielding portion 50. The plane may also be a vertical plane, but may also be a plane having some angle with respect to the vertical plane.

In the magazine pot 63 arranged obliquely, the position of the storage section 64 (i.e., the position of the notch 65 a) for storing the yarn feeding bobbin 70 supplied to the yarn feeding bobbin holding section 71 is a position facing the yarn path and including the plane. As shown in fig. 2 and 3, a slit 68 extending in the vertical direction is formed in the wall surface 64a formed in each housing portion 64. The direction in which the slit 68 extends is parallel to the central axis L3. The slit 68 penetrates the housing portion 64 in the vertical direction (direction parallel to the central axis L3). The slit 68 is arranged along the plane at the storage section 64 when the yarn supplying bobbin 70 is supplied from the storage section 64 to the yarn supplying bobbin holding section 71.

As shown in fig. 3, a chamfered portion 69 is formed by cutting out a part of the wall surface 64a in a triangular shape so as to widen the width of the slit 68 at the lower end of the slit 68. The chamfered portion 69 increases the width of the slit 68 as it goes downward. This makes it easy to maintain the lower yarn 20a in the housing portion 64 when the lower yarn 20a is lifted as described later.

The winder unit 10 further includes a yarn poking guide 80, and the yarn poking guide 80 is disposed at a height between the rotational shaft 33 of the lower yarn guide pipe 25 and the yarn feeding bobbin holding portion 71, and rotates about a rotational shaft (second rotational shaft) 83. As shown in fig. 2, the thread take-up guide 80 includes a drive motor 82 that rotationally drives the rotary shaft 83 under the control of the control unit 90, and a guide body 84 fixed to the distal end of the rotary shaft 83. As shown in fig. 3, a rotation axis L2 of the rotation shaft 83 extends, for example, in the vertical direction (vertical direction). The axis of rotation L2 may also extend at some angle to the vertical. As the drive motor 82, for example, a stepping motor is used. The flat plate-like guide body 84 extending substantially horizontally rotates within a predetermined rotation range (see fig. 5) along a horizontal plane, for example.

As shown in fig. 5, the guide body 84 includes a base portion 85 having a base end fixed to the rotation shaft 83, and a distal end portion 86 connected to a distal end of the base portion 85. The base part 85 is crescent-shaped and curved so as to bulge toward the yarn path of the spun yarn 20. The distal end portion 86 extends straight while being bent from the distal end of the base portion 85. A valley portion 87 depressed with respect to the yarn path of the spun yarn 20 is formed between the base portion 85 and the tip portion 86. The guide body 84 rotates about the rotation shaft 83, and the yarn hooking guide 80 hooks the lower yarn 20a stretched between the yarn supplying bobbin 21 held by the yarn supplying bobbin holding section 71 and the yarn end holding port 66 of the magazine pot 63 to the valley 87, thereby controlling the position of the lower yarn 20a.

As the guide body 84 (the yarn poking guide 80), the following structure is conventionally known: two guide bodies are provided at a predetermined interval from the top to the bottom, and the cutter penetrates between these guide bodies to cut the lower yarn 20a. In the present embodiment, the lower guide body of the two guide bodies is omitted, and only one guide body 84 is formed. Thereby, compared with the existing yarn poking guide, the structure is simplified. Of course, the cutter provided in the vicinity of the position when the lower yarn guide pipe 25 is rotated downward is also eliminated.

In the winder unit 10, the rotary shaft 33 of the lower yarn guide pipe 25 is provided to the main body portion 17, and the arm forming the main body of the lower yarn guide pipe 25 extends in a U shape open to the main body portion 17 (one end of the U shape is the rotary shaft 33, and the other end is the shielding portion 50). The rotating shaft 83 of the yarn dialing guide 80 is located closer to the main body 17 (the back side in fig. 3) than the center axis L3 of the bobbin storage device 62. As described above, in the lower yarn guide pipe 25 and the dial guide 80 provided as a structure for lifting the lower yarn 20a, there are no members or devices arranged on the side (the side opposite to the left-right direction) farther from the main body portion 17 in the direction of the rotation axis L1 than the lower yarn guide pipe 25. That is, the arm portion corresponding to the bottom side of the U-shape of the lower yarn guide pipe 25 is unique and projects away from the main body portion 17.

The winder unit 10 includes a control section 90 (see fig. 2) that controls the rotation of the lower yarn guide pipe 25, the rotation of the guide body 84 in the yarn poking guide 80, and the rotation of the magazine pot 63. The control Unit 90 is constituted by a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The control section 90 controls the drive motor (not shown) of the lower yarn guide pipe 25, the drive motor 82 of the yarn poking guide 80, and the drive motor 60a of the magazine tank 63. These controls are performed, for example, by loading a program stored in the ROM on the RAM and executing it with the CPU.

Fig. 4 is a side view showing a rotation range of the lower yarn guide pipe 25. Fig. 5 is a plan view showing a rotation range of the thread poking guide 80. The control section 90 controls to rotate the lower yarn guide pipe 25 and the guide body 84 of the yarn poking guide 80 to the ranges and positions shown in fig. 4 and 5. In the vertical rotational range of the lower yarn guide pipe 25, the standby position H1 is indicated by a solid line, and various positions other than the standby position H1 are indicated by virtual lines. In the horizontal rotation range of the guide main body 84, the standby position P1 is shown by a solid line, and various positions other than the standby position P1 are shown by a virtual line.

As shown in fig. 4, the control unit 90 controls the rotation of the lower yarn guide pipe 25 so that the shielding portion 50 of the lower yarn guide pipe 25 is positioned at the standby position H1, the yarn avoiding position H2 which is above the standby position H1 and at which the lower yarn guide pipe 25 is substantially horizontal, the yarn catching preparation position H3 which is slightly below the standby position H1, and the yarn catching position H4 which is slightly above the standby position H1. The standby position H1 is, for example, above the height of the guide body 84. The capture preparation position H3 is, for example, a position where the shielding portion 50 and the guide main body 84 are close to each other to such an extent that they do not abut against each other. Further, an origin position serving as a reference of the motion is provided further below the capture preparation position H3.

As shown in fig. 5, the control unit 90 controls the rotation of the guide body 84 so that the guide body 84 of the yarn poking guide 80 is positioned at the standby position P1, the avoiding position P2 rotated by a first rotation angle θ 1 in the direction toward the back side of the yarn path from the standby position P1, and the carrying position P3 rotated by a second rotation angle θ 2 in the opposite forward direction from the avoiding position P2. The standby position P1 is located at a position that is located at a position closer to the front than the lower yarn 20a stretched between the yarn feeding bobbin 21 held by the yarn feeding bobbin holding section 71 and the yarn end holding port 66 of the magazine tank 63, and is not engaged with the lower yarn 20a. The guide body 84 stands by at the standby position P1 until the yarn supplying bobbin 70 is supplied to the yarn supplying bobbin holding portion 71. The avoidance position P2 is a position at which the lower yarn 20a is introduced so as to avoid the trajectory (passage) of the shield portion 50 of the lower yarn guide pipe 25. The avoidance position P2 is located at the innermost side in the rotational range of the guide main body 84. The carrying position P3 is a position at which the lower yarn 20a is present on the trajectory (passage) of the shielding portion 50 of the lower yarn guide pipe 25.

The standby position P1 is the start of the rotational range of the yarn poking guide 80. The avoiding position P2 is the terminal end in the rotational range of the thread take-up guide 80. In addition, the carrying position P3 is an intermediate position between the start end and the end in the rotational range of the thread take-up guide 80. The intermediate position in the present embodiment is located near the end (near the end) of the start end. The control section 90 controls the rotation of the thread-plucking guide 80 so that the thread-plucking guide 80 is positioned at the start end, the end, and an intermediate position between the start end and the end, respectively.

The first rotation angle θ 1 may be less than 120 °, for example, with respect to the rotation range (angle) of the yarn poking guide 80 controlled by the control section 90. The second rotation angle θ 2 may be less than 20 °.

As shown in fig. 7, a lift assisting portion 56 is attached to the shield portion 50 of the lower yarn guide pipe 25 to facilitate engagement of the lower yarn 20a on the upper surface 51a (back surface) of the shield main body 51. The width of the lift assistance portion 56 is smaller than the width of the shielding portion 50. The lift assisting portion 56 includes a back surface portion 56a provided on the upper surface 51a of the shielding portion 50, and an end surface portion 56c provided on the distal end surface 52 of the shielding portion 50. A slope 57 rising from the upper surface 51a and having a reversed V-shape is formed between the rear surface portion 56a and the end surface portion 56c. The slope portion 57 guides the lower yarn 20a to the lower end (bottom) of the slope portion 57. In addition, the above structure is one structural example. The specific shape and structure of the shielding portion 50 are not limited to the shielding portion 50 shown in fig. 7.

Next, a flow of the control process (yarn winding method) performed by the control unit 90 will be described. Fig. 6 is a diagram showing the operation of the embodiment and the operation of the comparative example in relation to the operation of lifting the lower yarn 20a. In fig. 6, in the operation of the embodiment, a portion different from the operation of the comparative example is underlined. As shown in fig. 6, first, the control unit 90 controls the lower yarn guide pipe 25 so that the lower yarn guide pipe 25 is positioned at the standby position H1. The controller 90 controls the drive motor 82 to position the guide body 84 at the standby position P1. Next, the lower yarn 20a is detected.

Fig. 8 (a) is a diagram showing a state in which the thread-plucking guide 80 is located at the standby position P1. Fig. 8 (a), 8 (b), and 9 (a) are views each viewed from the direction a of fig. 5 and 6, and show that the lower yarn 20a extending from the yarn end holding port 66 of the bobbin storage device 62 to the yarn supplying bobbin 21 extends straight in the vertical direction. The lower yarn 20a passing through the slit 68 of the magazine pot 63 is located closer to the front than the shielding part 50 in fig. 8 (a). The lower yarn 20a is inclined so as to extend to the back side as it goes downward. When the lower yarn 20a is detected, the control unit 90 controls the lower yarn guide pipe 25 to position the lower yarn guide pipe 25 at the yarn avoiding position H2. Next, when the yarn supplying bobbin 70 falls and is held by the yarn supplying bobbin holding section 71 (bobbin supplying step), the control section 90 controls the drive motor 82 to position the guide body 84 at the avoiding position P2 (see fig. 8 (b) and 5) (yarn pulling step). The control unit 90 controls the lower yarn guide pipe 25 to position the lower yarn guide pipe 25 at the catching preparation position H3. At this time, the shield portion 50 moves downward, but the lower yarn 20a is avoided by the guide main body 84 (slightly to the right in fig. 8 (b)), so the shield portion 50 moves downward of the lower yarn 20a without contacting the lower yarn 20a.

Next, the control unit 90 controls the drive motor 82 to position the guide body 84 at the carrying position P3 (see fig. 9 a and 5). Thereby, the lower yarn 20a projects to the left of the avoiding position P2. The lower yarn 20a is located above the shielding portion 50, more specifically, above the inclined surface portion 57 of the lift assisting portion 56. Next, the control section 90 controls the lower yarn guide pipe 25 to move the lower yarn guide pipe 25 upward to be positioned at the yarn splicing position of the yarn splicing device 14. In the middle, the inclined surface portion 57 of the shielding portion 50 catches the lower yarn 20a at the yarn catching position H4, and takes the lower yarn 20a upward. As shown in fig. 9 (b), the lower yarn 20a is not cut, but is lifted by the back surface of the shielding portion 50. After that, the joint action is performed at the joint device 14.

The cut portion (the portion on the bobbin storage device 62 side) of the lower yarn 20a is sucked into the yarn end holding port 66 and removed.

As described above, in the series of operations, in the yarn pulling step, the guide main body 84 is rotated from the standby position P1 at which it is standby until the yarn supplying bobbin 70 is supplied to the yarn supplying bobbin holding portion 71 to the avoiding position P2 at which the lower yarn 20a is guided to avoid the passage of the lower yarn 20a through the shielding portion 50 of the lower yarn guide pipe 25. Next, the lower yarn guide pipe 25 is rotated downward so that the shielding portion 50 of the lower yarn guide pipe 25 passes by the side of the lower yarn 20a. Then, the guide body 84 is rotated from the avoiding position P2 to a carrying position P3 where the lower yarn 20a is carried along the passage of the shielding part 50. As shown in fig. 8 (b) and 9 (a), while the thread-dialing guide 80 is located at the avoidance position P2 and the carry-away position P3, the lower thread 20a hooked on the thread-dialing guide 80 passes through the housing 64 (located inside the housing 64) of the magazine can 63. When the lower yarn 20a is lifted, the lower yarn 20a passes through the slit 68 and is separated from the housing portion 64.

According to the winder unit 10, the rotation of the yarn poking guide 80 is controlled by the control unit 90 so that the yarn poking guide 80 is positioned at the standby position P1, the avoiding position P2, and the carrying position P3. At the avoidance position P2, the lower yarn 20a is introduced, and the lower yarn 20a avoids the passage of the shield portion 50 of the lower yarn guide pipe 25. Therefore, when the lower yarn guide pipe 25 is rotated downward, a positional relationship is established in which the shielding portion 50 of the lower yarn guide pipe 25 passes laterally of the lower yarn 20a (see fig. 8 (b)). At the carrying position P3, since the lower yarn is present on the passage of the shield portion 50 of the lower yarn guide pipe 25 (see fig. 9 a), when the lower yarn guide pipe 25 is rotated upward, the lower yarn 20a engages with the shield portion 50 and is carried away (see fig. 9 b). The yarn poking guide is a member that can be provided in a conventional device to hook a lower yarn and cut by a cutter. The position control of the lower yarn 20a described above is performed using this conventional member, and the lower yarn 20a can be lifted by the lower yarn guide pipe 25. Unlike the conventional apparatus described above, the apparatus structure is not complicated. The lower yarn 20a can be more stably guided to the yarn splicing device 14 than in the case of catching the lower yarn cut by the cutter. In addition, compared to the conventional device, the lower yarn cutting step by the cutter is omitted, and the lower yarn is lifted by the lower yarn guide pipe 25 and cut upward, which is also advantageous in view of the cycle time.

The above operation may be performed during standby for the doffing operation of the doffing device. During the standby of the doffing operation, the doffing device cannot catch the lower yarn 20a. Therefore, the yarn lowering guide pipe 25 is returned to the catching preparation position H3 once the above-described bobbin replacing operation is performed, and therefore, the normal doffing operation is performed on standby.

The drive motor 82 of the yarn dialing guide 80 is located closer to the main body portion 17 side than the center axis L3 of the bobbin storage device 62. Both the turning shaft 33 and the turning shaft 83 are located on the side of the main body 17, and the space on the opposite side of the main body 17 is not occupied by these devices. This is advantageous from the viewpoint of layout (or space utilization) of the entire cell.

While the yarn poking guide 80 is being rotationally controlled, the lower yarn 20a is positioned within the housing section 64 formed in the bobbin housing device 62, and therefore the posture of the lower yarn 20a is stabilized.

The rotation range of the guide body 84 is less than 120 °, and it is sufficient if the rotation range is slightly enlarged from the conventional rotation range (when a cutter is used). It is sufficient that no change in control is made, and in the structure of the apparatus, there is little modification.

The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments. For example, the yarn pulling guide 80 may be provided on the opposite side of the main body 17. The rotation angle of the guide body 84 is not limited to less than 120 °, and may be set to an appropriate rotation angle exceeding 120 °.

Claims (6)

1. A yarn winding unit is provided with:

a yarn feeding bobbin holding section for holding a yarn feeding bobbin;

a magazine type storage device having a bobbin storage device that stores the yarn supplying bobbin, and configured to drop the yarn supplying bobbin from the bobbin storage device and supply the yarn supplying bobbin to the yarn supplying bobbin holding unit;

a winding device that winds the yarn unwound from the yarn supply bobbin to form a package;

a yarn splicing device for splicing the first yarn on the yarn feeding bobbin side and the second yarn on the package side;

a first yarn guide pipe that is vertically rotatable around a first rotation axis above the yarn supplying bobbin holding section;

a yarn pulling guide that is arranged at a height between the first rotating shaft and the yarn supplying bobbin holding section, and that hooks and moves the first yarn tensioned between the yarn supplying bobbin held by the yarn supplying bobbin holding section and the bobbin storage device by rotating about a second rotating shaft;

and a control unit that controls rotation of the yarn poking guide so that the yarn poking guide is positioned at a standby position where the yarn feeding bobbin is on standby until the yarn feeding bobbin is fed to the yarn feeding bobbin holding unit, at an avoidance position where the first yarn is guided into the first yarn so as to avoid a passage path of the tip end of the first yarn guide pipe, and at a carrying position where the first yarn is carried along the passage path.

2. The yarn winding unit of claim 1,

the first rotation shaft of the first yarn guide pipe is provided to a body portion of the yarn winding unit, and the second rotation shaft of the yarn poking guide is located closer to the body portion than a center axis of the bobbin storage device.

3. The yarn winding unit of claim 1 or 2,

the bobbin storage device includes a cylindrical storage section that stores the yarn supplying bobbin, and the first yarn hooked on the yarn dialing guide is located in the storage section while the yarn dialing guide is located at the avoidance position or the carrying away position.

4. The yarn winding unit according to any one of claims 1 to 3,

a rotation angle from the standby position to the avoidance position around the second rotation axis is less than 120 °.

5. The yarn winding unit according to any one of claims 1 to 4,

the control unit controls the rotation of the yarn poking guide so that the yarn poking guide is located at a start end of the standby position, a terminal end of the avoidance position, and an intermediate position between the start end and the terminal end as the carrying-away position.

6. A yarn winding method of a yarn winding unit for winding a yarn unwound from a yarn supplying bobbin holding section holding a yarn supplying bobbin to form a package, wherein,

the yarn winding unit includes: a magazine type storage device having a bobbin storage device for storing the yarn feeding bobbin; a yarn splicing device for splicing the first yarn on the yarn feeding bobbin side and the second yarn on the package side; a first yarn guide pipe vertically rotatable around a first rotation axis above the yarn feeding bobbin holding section; and a yarn hooking guide disposed at a height between the first rotating shaft and the yarn supplying bobbin holding section and configured to hook the first yarn by rotating about a second rotating shaft,

the yarn winding method comprises the following steps: a bobbin supplying step of dropping the yarn feeding bobbin from the bobbin storage device by the magazine type storage device and supplying the yarn feeding bobbin to the yarn feeding bobbin holding section; and a yarn pulling step of hooking the first yarn stretched between the yarn supplying bobbin held by the yarn supplying bobbin holding section and the bobbin storage device by the yarn pulling guide,

in the yarn poking step, the yarn poking guide is rotated from a standby position at which the yarn feeding bobbin is standby until the yarn feeding bobbin is supplied to the yarn feeding bobbin holding portion, to an avoidance position at which the first yarn is introduced into the first yarn while avoiding a passage path of a tip end portion of the first yarn guide pipe, and the yarn poking guide is rotated from the avoidance position to a carrying-away position at which the first yarn exists on the passage path by rotating the first yarn guide pipe downward while allowing the tip end portion of the first yarn guide pipe to pass to the side of the first yarn.

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