CN106927311B - Yarn winding device - Google Patents

Abstract

The invention provides a yarn winding device. The yarn winding device comprises: a yarn supply unit on which a yarn supply bobbin on which a yarn is wound is supported; a winding unit that winds the yarn drawn out from the yarn supplying bobbin supported by the yarn supplying unit; a yarn end blowing section that feeds a yarn end of the yarn supplying bobbin to the winding section side by a blown air flow; and a yarn catching section that catches the yarn end conveyed by the yarn end blowing section. The yarn catching part is provided with: a main body portion; and a suction portion formed of a cylindrical member, in which a suction port for sucking the yarn is formed. The suction portion is provided so as to be linearly movable in the main body portion in a reciprocating manner in the axial direction of the tubular member, and generates a suction force at the suction port at a first position close to a yarn path of the yarn moving from the yarn feeding portion to the winding portion, and does not generate a suction force at the suction port at a second position retracted from the yarn path.

Description

yarn winding device

Technical Field

The present invention relates to a yarn winding device.

Background

Conventionally, a yarn catching section is known which is attached to a yarn winding device and catches a yarn when the yarn is broken or the like. For example, japanese patent application laid-open No. 2012-20852 discloses a yarn winding device including: a yarn end blowing section for conveying the yarn end of the yarn supplying bobbin to the winding section side by an air flow; and a yarn catching section that catches the yarn end conveyed by the yarn end blowing section.

The conventional yarn catching section generates a suction force all the time when the yarn winding device is in operation. That is, the conventional yarn catching section generates an attractive force even when it is not necessary to catch the yarn. As described above, in the conventional art, power is always consumed in the negative pressure source generating the suction force, and therefore, it is not efficient.

Disclosure of Invention

The invention aims to provide a yarn winding device capable of realizing efficient operation.

The yarn winding device according to the present invention includes: a yarn supply unit on which a yarn supply bobbin on which a yarn is wound is supported; a winding unit that winds the yarn drawn out from the yarn supplying bobbin supported by the yarn supplying unit; a yarn end blowing section that feeds a yarn end of the yarn supplying bobbin to the winding section side by a blown air flow; and a yarn catching section that catches the yarn end conveyed by the yarn end blowing section, the yarn catching section including: a main body portion; and a suction unit formed of a tubular member, in which a suction port for sucking the yarn is formed, the suction unit being provided so as to be linearly movable in the main body unit in a reciprocating manner in the axial direction of the tubular member, the suction unit generating a suction force at the suction port at a first position close to a yarn path of the yarn moving from the yarn feeding unit to the winding unit, and the suction unit not generating a suction force at the suction port at a second position retracted from the yarn path.

In this yarn winding device, the suction portion of the yarn catching portion generates a suction force at the suction port at a first position close to a yarn path of the yarn moving from the yarn feeding portion to the winding portion, and does not generate a suction force at the suction port at a second position retreated from the yarn path. In this configuration, when the yarn end is not sucked, the suction port can be made not to generate a suction force by setting the suction portion to the second position. Therefore, when the yarn end is not caught, the consumption of the electric power of the negative pressure source can be suppressed. As a result, the yarn winding device can be operated efficiently.

In one embodiment, the yarn catching portion may include a driving portion that reciprocates the suction portion, and the driving portion may move the suction portion to the first position and the second position. In this configuration, when the yarn end is not sucked, the driving unit moves the suction unit to the second position, thereby more reliably suppressing the power consumption of the negative pressure source.

In one embodiment, the main body portion may have a hollow portion that defines a space in which the suction portion is located and that is made negative by a negative pressure source, the suction portion may have a suction port at one end in the axial direction and a closed end at the other end, an opening portion that communicates with the inside may be provided between the one end and the other end, and the driving portion may move the suction portion to a first position where the opening portion communicates with the hollow portion and a second position where the opening portion is closed by the main body portion. In this configuration, the opening communicating with the inside of the suction portion is closed by moving the suction portion to the second position. Therefore, at the second position, no suction force is generated at the suction portion. Therefore, the power consumption of the negative pressure source can be reliably suppressed.

In one embodiment, the yarn supplying device may further include a yarn splicing device that connects the yarn of the yarn supplying bobbin captured by the yarn capturing unit and the yarn wound around the winding unit, the driving unit may be configured to move the suction unit to a third position where a part of the opening communicates with the hollow portion and a suction force weaker than the first position is generated at the suction port, in addition to the first position and the second position, and the driving unit may be configured to move the suction unit to the third position when the yarn splicing device connects the yarn. When the yarn is connected to the yarn splicing device, the suction of the yarn end by the suction section is maintained. At this time, if the suction force of the suction portion to the yarn end is large, yarn breakage may occur. Therefore, the suction force can be reduced by positioning the suction portion at the third position where a part of the opening communicates with the hollow portion. Therefore, yarn breakage at the time of piecing can be suppressed.

In one embodiment, the present invention may be configured to include: a cutter that cuts the yarn; and a yarn monitoring device that monitors a state of the yarn, wherein the yarn splicing device is disposed between the yarn feeding unit and the winding unit, splices the yarn cut between the yarn feeding unit and the winding unit, and the yarn catching unit, the cutter, and the yarn monitoring device are disposed in this order downstream of the yarn splicing device. According to such a configuration, when the yarn monitoring device detects, for example, a yarn defect and cuts the yarn by the cutter, the yarn catching section can reliably catch the cut yarn and guide the caught yarn to the yarn splicing device.

In one embodiment, the present invention may be configured to include: a cutter that cuts the yarn; a yarn monitoring device that monitors a state of the yarn; and a yarn accumulating device for drawing out and accumulating the yarn from the yarn feeding section, wherein the yarn splicing device is disposed between the yarn feeding section and the yarn accumulating device, splices the yarn cut between the yarn feeding section and the yarn accumulating device, and the yarn catching section, the cutter, the yarn monitoring device, and the yarn accumulating device are disposed in this order downstream of the yarn splicing device. According to such a configuration, when the yarn monitoring device detects, for example, a yarn defect and cuts the yarn by the cutter, the yarn catching section can reliably catch the cut yarn and guide the caught yarn to the yarn splicing device.

in one embodiment, the yarn catching portion may include a detection portion that detects the yarn end sucked by the suction port. This makes it possible to detect whether or not the yarn end is sucked by the suction unit.

In one embodiment, the yarn catching portion may include a shutter that opens or closes the suction port in accordance with movement of the suction portion. In this structure, the attraction force varies depending on the position of the movement. Therefore, when the yarn is not sucked, the suction portion is moved to a position where the suction port is closed by the shutter, and thus the consumption of the electric power of the negative pressure source can be more reliably suppressed.

In one embodiment, the yarn catching portion may include a driving portion that reciprocates the suction portion, and the driving portion may move the suction portion to a first position at which the shutter is opened to open the suction port and a second position at which the suction port is closed by the shutter. In this configuration, the suction port is closed by the shutter by moving the suction portion to the second position. Therefore, at the second position, no suction force is generated at the suction portion. Therefore, the power consumption of the negative pressure source can be reliably suppressed.

According to the present invention, efficient operation can be achieved.

drawings

fig. 1 is a schematic front view showing an overall configuration of an automatic winder according to an embodiment.

fig. 2 is a schematic side view showing a winder unit according to an embodiment.

Fig. 3 is a perspective view illustrating the first trap part.

fig. 4 is a perspective view illustrating the first trap part.

Fig. 5 is a diagram illustrating an operation of the first capturing unit.

Fig. 6 is a diagram illustrating an operation of the first capturing unit.

Fig. 7 is a perspective view illustrating a first capturing unit according to another embodiment.

Fig. 8 is a perspective view illustrating a first capturing unit according to another embodiment.

Detailed Description

hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or corresponding elements are denoted by the same reference numerals, and redundant description thereof is omitted. "upstream" and "downstream" refer to upstream and downstream, respectively, in the direction of travel of the yarn during spinning.

As shown in fig. 1, an automatic winder 1 includes a plurality of winder units (yarn winding devices) 2 arranged in an array, a body control device 3, a yarn supplying bobbin supplying device 4, a doffing device 5, and a blower box (not shown).

the body control device 3 is configured to be able to communicate with each winder unit 2. An operator of the automatic winder 1 can collectively manage the plurality of winder units 2 by appropriately operating the body control device 3. The body control device 3 controls the operations of the yarn supplying bobbin supplying device 4 and the doffing device 5.

The yarn supplying bobbin supplying device 4 places the yarn supplying bobbins 21 one by one on the conveying tray 26 by a mechanism not shown. The yarn supplying bobbin supplying device 4 supplies the yarn supplying bobbins 21 placed on the transport tray 26 to the plurality of winder units 2, respectively.

when the winder unit 2 is fully wound with the package 30 (a state where the predetermined amount of the yarn 20 is wound), the doffer 5 moves to the position of the winder unit 2 and takes off the fully wound package 30. The doffer 5 places the empty (in a state where the yarn is not wound) winding bobbin 22 on the winder unit 2 from which the package 30 is removed.

Next, the structure of the winder unit 2 will be explained. As shown in fig. 2, the winder unit 2 includes a yarn supplying section 6, a yarn accumulating device 18, and a package forming section 8.

in the winder unit 2, the yarn 20 of the yarn supplying bobbin 21 of the yarn supplying section 6 is unwound, the unwound yarn 20 is temporarily stored in the yarn storage device 18, and then wound on the winding bobbin 22 to form a package 30.

the yarn supplying section 6 supports the yarn supplying bobbin 21 placed on the transport tray 26 at a predetermined position, and unwinds and supplies the yarn 20 from the yarn supplying bobbin 21. When all the yarns 20 are unwound from the yarn supplying bobbin 21, the yarn supplying section 6 discharges the empty yarn supplying bobbin 21 and receives supply of a new yarn supplying bobbin 21 from the yarn supplying bobbin supplying device 4.

The yarn accumulating device 18 is disposed between the yarn supplying section 6 and the package forming section 8. The yarn accumulating device 18 is provided at a position upstream of the package forming section 8 in the traveling direction of the yarn 20. The yarn accumulating device 18 temporarily accumulates the yarn 20 supplied from the yarn supplying section 6. The yarn accumulating device 18 is configured to allow the package forming section 8 to draw out the accumulated yarn 20.

The yarn accumulating device 18 includes: a yarn accumulating roller 32 capable of winding the yarn 20; and a roller driving motor 33 for driving the yarn accumulating roller 32. The roller drive motor 33 rotates the yarn accumulating roller 32 in a direction to wind the yarn 20 supplied from the yarn supplying section 6. The roller driving motor 33 may rotate the yarn accumulating roller 32 in a direction opposite to the winding direction.

the package forming section 8 includes: a cradle 23 configured to be able to mount the winding bobbin 22; and a traverse roller 24 that drives the winding bobbin 22 while traversing the yarn 20. The package forming section 8 constitutes a winding section. The cradle 23 rotatably supports the winding bobbin 22 (or the package 30). The cradle 23 supports the outer peripheral surface of the package 30 so as to be able to contact with or separate from the outer peripheral surface of the traverse drum 24.

The traverse drum 24 is rotationally driven by a drive source (an electric motor or the like), not shown, and rotates while being in contact with the outer peripheral surface of the winding bobbin 22 or the package 30, thereby rotating the winding bobbin 22. Thus, the yarn 20 stored in the yarn storage device 18 can be unwound and drawn out via the drawing guide 37 and wound on the winding bobbin 22. A traverse groove (not shown) is formed in the outer peripheral surface of the traverse drum 24, and the yarn 20 can be traversed (moved laterally) by a predetermined width using the traverse groove. With the above configuration, the yarn 20 can be wound around the winding bobbin 22 while being traversed, and a package 30 having a predetermined shape can be formed in a predetermined length.

The winder unit 2 includes various devices in a yarn running path from the yarn supplying section 6 to the package forming section 8 via the yarn accumulating device 18. Specifically, in the yarn passage of the yarn 20, the unwinding assisting device 10, the first blowing section (yarn end blowing section) 11, the second catching section 12, the splicing device 13, the first catching section (yarn catching section) 14, the tension applying device 15, the cutter 16, the yarn monitoring device 17, and the second blowing section 48 are arranged in this order from the upstream yarn feeding section 6 side toward the downstream yarn accumulating device 18 side.

The unwinding assisting device 10 assists the unwinding of the yarn 20 by bringing the movable member 27 into contact with the balloon formed on the upper portion of the yarn supplying bobbin 21 by waving the yarn 20 unwound from the yarn supplying bobbin 21 and appropriately controlling the size of the balloon.

The first blowing unit 11 is a suction device disposed at a position close to the unwinding assisting device 10 on the downstream side of the unwinding assisting device 10. The first blowing section 11 forms an air flow for blowing the yarn 20 to the first catching section 14 by blowing compressed air. Therefore, for example, when a yarn break occurs, the first blowing section 11 operates to blow the yarn end on the yarn supplying bobbin 21 side toward the yarn splicing device 13 side.

Immediately after the new yarn supplying bobbin 21 is supplied to the yarn supplying section 6, the yarn 20 is not sufficiently drawn out from the yarn supplying bobbin 21, and therefore it may be difficult to blow the yarn end to the yarn splicing device 13 side by the first blowing section 11. In consideration of this, an auxiliary blowing section 28 is provided at the yarn feeding section 6 of the winder unit 2.

the auxiliary blowing section 28 blows compressed air into the hollow conveyance tray 26 and the yarn supplying bobbin 21, thereby forming an air flow for blowing the yarn 20 of the yarn supplying bobbin 21 toward the first blowing section 11 at the tip end of the yarn supplying bobbin 21. When the newly supplied yarn supplying bobbin 21 is supported by the yarn supplying section 6, the auxiliary blowing section 28 and the first blowing section 11 are operated in conjunction with each other, and thus the yarn end on the yarn supplying bobbin 21 side can be reliably conveyed toward the yarn splicing device 13 side.

The second capturing portion 12 is disposed at a position close to the joint device 13 on the upstream side of the joint device 13. The second catching part 12 is connected to a suction air flow generating source, not shown, and generates a suction air flow at the time of piecing, thereby sucking and catching the yarn 20 on the yarn accumulating device 18 side.

the piecing device 13 performs piecing of the broken yarn 20. When the yarn 20 is disconnected between the yarn supplying bobbin 21 and the yarn accumulating device 18, such as when the yarn monitoring device 17 detects a yarn defect and cuts the yarn 20 by the cutter 16, when the yarn 20 is disconnected from the yarn supplying bobbin 21 during unwinding, or when the yarn supplying bobbin 21 is replaced, the yarn splicing device 13 splices the yarn 20 on the yarn supplying bobbin 21 side and the yarn 20 on the yarn accumulating device 18 side. The yarn splicing device 13 is disposed at a position slightly retreating from the yarn path. The yarn splicing device 13 can connect the ends of the introduced yarns to each other to make the yarns 20 continuous. As the joint device 13, a device using a fluid such as compressed air or a mechanical device can be used.

The first trap part 14 is disposed at a position on the downstream side of the joint device 13 and close to the joint device 13. The first catching part 14 generates a suction airflow at its tip end side in a state of being close to the yarn path, thereby sucking and catching the yarn end from the yarn supplying bobbin 21 blown by the first blowing part 11. The detailed structure of the first trap part 14 will be described later.

The tension applying device 15 applies a predetermined tension to the running yarn 20. The tension applying device 15 is configured in a shed type by arranging movable comb teeth with respect to fixed comb teeth, and applies a predetermined resistance by causing the yarn 20 to travel between the comb teeth. The movable comb teeth are configured to be movable by a solenoid, for example, so that the comb teeth are engaged with each other or disengaged from each other. Thereby, the tension applying device 15 can adjust the tension applied to the yarn 20. The structure of the tension applying device 15 is not particularly limited, and may be a disk-type tension applying device, for example.

the yarn monitoring device 17 monitors the thickness of the yarn 20 and the like with an appropriate sensor to detect a yarn defect such as a heavy end or a foreign matter. A cutter 16 is disposed at a position close to the yarn monitoring device 17 on the upstream side of the yarn monitoring device 17. The cutter 16 immediately cuts the yarn 20 when the yarn monitoring device 17 detects a yarn defect.

The cutter 16 and the yarn monitoring device 17 are housed in a common case 19. The housing 19 that houses the yarn monitoring device 17 is disposed on the downstream side of the tension applying device 15 in the vicinity of the tension applying device 15. According to this configuration, since the vicinity of the portion where the traveling yarn 20 is held (guided) by the tension applying device 15 is monitored by the yarn monitoring device 17, the yarn 20 in the monitored portion is less likely to wobble, and the accuracy with which the yarn monitoring device 17 detects a defect in the yarn 20 can be further improved.

The second blowing section 48 is an air suction device disposed at a position close to the yarn accumulating device 18 on the upstream side of the yarn accumulating device 18. The second blowing section 48 forms an air flow for blowing off the yarn end on the yarn accumulating device 18 side by blowing out the compressed air and sending the yarn end to the second catching section 12. Specifically, the second blowing section 48 includes a thin cylindrical guide member through which the yarn 20 can pass. An outlet for the yarn 20 is formed at one end of the guide member.

the yarn guide member 60 is provided close to the air outlet of the second blowing section 48. Openings are formed at both ends of the yarn guide member 60 in the longitudinal direction. The yarn guide member 60 is disposed in a state in which the opening on one end side faces the outlet of the second blowing section 48 and the opening on the other end side faces the second catching section 12. A guide path is formed inside the yarn guide member 60. The guide path connects the openings at both ends of the yarn guide member 60 to each other so as to bypass the yarn monitoring device 17, the tension applying device 15, the yarn splicing device 13, and the like. The second blowing section 48, the yarn guide 60, and the second catching section 12 constitute a storage-side yarn end catching device 50.

When the yarn 20 is in the disconnected state between the yarn supplying bobbin 21 and the yarn accumulating device 18, the second blowing section 48 catches the yarn 20 on the side of the yarn accumulating device 18 and blows the yarn to the guide path of the yarn guide member 60, and pulls out the yarn 20 along the guide path to catch the yarn by the second catching section 12. Since the yarn guide member 60 is provided with a slit, not shown, over the entire length thereof, the yarn 20 can be pulled out from the inside of the yarn guide member 60 in a state where the second catching portion 12 catches the yarn 20. According to the above, the yarn 20 on the yarn accumulating device 18 side can be blown by the second blowing section 48 and guided toward the yarn splicing device 13 side.

Each winder unit 2 includes a control unit 25. The control unit 25 includes hardware such as a CPU, ROM, and RAM, which are not shown. The RAM stores software such as a control program. The control unit 25 controls each configuration of the winder unit 2 by cooperation of hardware and software. The control unit 25 is configured to be able to communicate with the body control device 3. This enables the body control device 3 to collectively manage the operations of the plurality of winder units 2 included in the automatic winder 1.

next, the first capturing unit 14 will be described in detail. As shown in fig. 3 and 4, the first capturing section 14 includes a base 70, a main body section 72, a suction section 74, a driving section 76, and a yarn detecting section 78. In the following description, the right side in fig. 5 and 6 is defined as "front", and the left side is defined as "rear".

The base 70 is formed of, for example, a plate-shaped metal member. The base 70 is L-shaped, for example. The base 70 has a support portion 70a and a fixing portion 70 b. The support portion 70a supports the suction portion 74, the drive portion 76, and the yarn detection portion 78. The fixing portion 70b is fixed to the frame of the winder unit 2.

The body portion 72 is attached to the lower surface of the support portion 70a of the base 70. The main body portion 72 supports the suction portion 74 so as to be capable of reciprocating (slidable). As shown in fig. 5 and 6, the main body 72 is provided with insertion holes 72a and 72b through which the suction portion 74 is inserted. The insertion holes 72a and 72b have the same shape as the outer shape (circular shape) of the suction portion 74. The diameters of the insertion holes 72a and 72b are substantially the same as the outer diameter of the suction portion 74. The insertion hole 72a and the insertion hole 72b are coaxially arranged.

The body portion 72 has a hollow portion 72 c. The hollow portion 72c partitions and forms a space in which the suction portion 74 is located. The hollow portion 72c is disposed between the insertion hole 72a and the insertion hole 72 b. The main body 72 has a connection portion 73 to which a negative pressure source, not shown, is connected. The connection portion 73 has a flow path 73a communicating with the hollow portion 72 c. Thereby, the hollow portion 72c of the body portion 72 becomes negative pressure by the negative pressure source connected to the connection portion 73. The air tightness of the hollow portion 72c is ensured. Specifically, sealing members (e.g., O-rings), not shown, are disposed in the insertion holes 72a and 72 b. This can suppress air leakage from between the suction portion 74 and the insertion holes 72a and 72b, and ensure airtightness of the hollow portion 72 c.

The suction portion 74 is formed of a cylindrical member. The suction portion 74 reciprocates in the main body portion 72 in the axial direction (longitudinal direction) of the suction portion 74. A suction port 74a is provided at one end (tip end, front end) of the suction portion 74 in the axial direction. The suction port 74a takes the yarn 20 into the interior. The other end (rear end) of the suction portion 74 in the axial direction is closed by, for example, a seal portion 74 b. The suction portion 74 is provided in the body portion 72 so as to extend through the insertion hole 72a, the hollow portion 72c, and the insertion hole 72 b.

The suction portion 74 has an opening 75 between one end and the other end. The opening 75 is disposed, for example, substantially at the center in the axial direction of the suction portion 74. The opening 75 is formed through a side surface of the suction portion 74 so as to communicate with the inside (flow path) of the suction portion 74. The suction force of the suction portion 74 varies depending on the position of the opening 75. Specifically, as shown in fig. 5(b), when the suction portion 74 is located at the first position where the opening 75 communicates with the hollow portion 72c, the first suction force is generated. As shown in fig. 5(a), when the suction portion 74 is located at the second position where the opening 75 is closed by the insertion hole 72b of the body portion 72, no suction force is generated.

As shown in fig. 6(a), when the suction portion 74 is located at the third position where a part of the opening 75 communicates with the hollow portion 72c, a second suction force weaker than the first suction force is generated. Specifically, in the third position, the opening area of the opening 75 is smaller than that in the first position, and therefore the suction force of the suction portion 74 is weakened.

The suction portion 74 is provided with a restriction portion 74 c. The restricting portion 74c is a member that restricts the movement of the suction portion 74. The restricting portion 74c is disposed on the outer periphery of the suction portion 74 on the front side.

The restricting portion 74c abuts the insertion hole 72a of the body portion 72 to restrict the rearward movement of the suction portion 74.

The driving section 76 reciprocates (advances and retreats) the suction section 74. The driving unit 76 includes a motor 80 and a driving force transmission mechanism 81. In the present embodiment, the motor 80 is a stepping motor. The motor 80 is fixed to the upper surface of the support portion 70a of the base 70. The motor 80 has a rotating shaft. The operation of the motor 80 is controlled by the control unit 25. Specifically, the motor 80 is driven by a pulse signal output from the control unit 25.

the driving force transmission mechanism 81 transmits the driving force of the motor 80 to the suction portion 74. The driving force transmission mechanism 81 changes the rotation of the rotary shaft of the motor 80 to a linear motion that reciprocates the suction portion 74.

The driving force transmission mechanism 81 has a first movable portion 82 and a second movable portion 83. The first movable portion 82 has one end connected to the rotation shaft and the other end connected to a connecting portion 84 provided at the other end of the suction portion 74. The second movable portion 83 has one end integrally connected to the first movable portion 82 and the other end provided with a detection portion for detecting the position of the driving force transmission mechanism 81 by a sensor portion 85 provided on the support portion 70a of the base 70. The driving unit 76 reciprocates the suction unit 74 by driving of the motor 80, and linearly reciprocates the suction unit 74 at the first position, the second position, and the third position.

the yarn detecting section 78 detects the yarn 20. The yarn detecting portion 78 is attached to the main body portion 72. Specifically, the yarn detecting section 78 is attached to the main body section 72 by an attachment member 79. The yarn detecting section 78 is disposed on the suction port 74a side of the suction section 74. Thereby, the yarn detecting section 78 detects the yarn 20 sucked by the suction section 74.

The first catching part 14 having the above-described configuration sucks and catches the yarn end of the cut yarn 20 on the yarn supplying bobbin 21 side when the yarn 20 is cut by the cutter 16. The first catching part 14 may be configured to suck and remove the fly waste or the like adhering to the running yarn 20 by generating a suction airflow at the suction port 74a of the suction part 74.

Next, the operation of the first capturing unit 14 will be described. As shown in fig. 5(a), the suction unit 74 is located at the second position in the standby state of the first trap unit 14. At the second position, the suction portion 74 is located on the rear side (at a position where the suction port 74a is away from the yarn passage). At this time, the opening 75 is closed by the insertion hole 72 b. Thus, since the opening 75 is not communicated with the hollow portion 72c, the suction portion 74 does not apply a negative pressure therein, and does not generate a suction force.

For example, when the yarn monitor 17 detects a yarn defect and the cutter 16 cuts the yarn 20, the first blowing unit 11 blows the yarn 20 on the yarn feeding unit 6 side (the yarn feeding bobbin 21 side) upward.

when the yarn 20 is cut in the first catching part 14, the driving part 76 moves the suction part 74 to the first position as shown in fig. 5 (b). At the first position, the suction portion 74 is located on the front side (at a position where the suction port 74a approaches the yarn passage). At this time, the opening 75 communicates with the hollow portion 72c (flow path 73 a). As a result, negative pressure acts on the inside of the suction portion 74, and a first suction force is generated. The first suction force is set to a suction force capable of sucking the end of the yarn. Further, when the yarn supplying bobbin 21 is newly supplied to the yarn supplying section 6, the auxiliary blowing section 28 operates almost simultaneously to assist the blowing of the yarn end portion of the first blowing section 11. The yarn 20 blown up by the first blowing section 11 is sucked and caught by the first catching section 14.

in the first catching part 14, when the suction part 74 catches the yarn end of the yarn 20 blown by the first blowing part 11, the driving part 76 moves the suction part 74 to the third position as shown in fig. 6 (a). In the third position, one end of the suction portion 74 is located in the vicinity of the yarn detecting portion 78. Thereby, the yarn 20 captured by the suction portion 74 is detected by the yarn detecting portion 78. When the yarn 20 is not detected by the yarn detecting section 78, the first catching section 14 moves the suction section 74 again to the first position to perform the catching operation of the yarn 20 again. When the suction portion 74 is located at the third position, a part of the opening 75 communicates with the hollow portion 72 c. As a result, negative pressure acts on the inside of the suction portion 74, and a second suction force weaker than the first suction force is generated. In this state, the yarn splicing device 13 is operated to connect the yarn 20 on the yarn supplying bobbin 21 side captured by the first capturing unit 14 and the yarn 20 on the yarn accumulating device 18 side captured by the second capturing unit 12.

When the joint operation by the joint device 13 is completed in the first catching portion 14, the driving portion 76 moves the suction portion 74 to the second position as shown in fig. 6 (b). At this time, the opening 75 is closed by the insertion hole 72 b. Thus, since the opening 75 is not communicated with the hollow portion 72c, the suction portion 74 does not apply a negative pressure therein, and the generation of the suction force is stopped, thereby releasing the catching of the yarn end.

As described above, in the first catch section 14 of the winder unit 2 according to the present embodiment, the suction section 74 generates the suction force at the suction port 74a at the first position close to the yarn path of the yarn 20, and does not generate the suction force at the suction port 74a at the second position retracted from the yarn path. In this configuration, when the yarn end is not sucked, the suction port 74a can be prevented from generating a suction force by setting the suction portion 74 to the second position. The negative pressure source consumes power when the suction airflow is generated at the suction port 74a of the suction unit 74, and suppresses power consumption when the suction airflow is not generated at the suction port 74a of the suction unit 74. Therefore, in the first catching part 14 in which the suction airflow is not generated when the yarn end is not caught, the consumption of the electric power of the negative pressure source can be suppressed. As a result, the winder unit 2 can operate efficiently.

In the present embodiment, the first capturing unit 14 includes a driving unit 76 that reciprocates the suction unit 74. The driving unit 76 moves the suction unit 74 to a first position where the suction force is generated at the suction port 74a and a second position where the suction force is not generated at the suction port 74 a. In this configuration, when the yarn end is not sucked, the suction portion 74 is moved to the second position by the driving portion 76, whereby the consumption of the electric power of the negative pressure source can be more reliably suppressed.

in the present embodiment, the body portion 72 has a hollow portion 72c, and the hollow portion 72c defines and forms a space in which the suction portion 74 is located, and is set to a negative pressure by the negative pressure source. The suction portion 74 has a suction port 74a at one end in the axial direction, and has an opening 75 between the one end and the other end, the opening communicating with the inside. The driving section 76 moves the suction section 74 to a first position where the opening section 75 communicates with the hollow section 72c and a second position where the opening section 75 is closed by the body section 72. In this configuration, the opening 75 communicating with the inside of the suction portion 74 is closed by moving the suction portion 74 to the second position. Therefore, at the second position, no suction force is generated at the suction portion 74. Therefore, the power consumption of the negative pressure source can be reliably suppressed.

In the present embodiment, the driving unit 76 is configured to be able to move the suction unit 74 to the first position and the second position, and also to be able to move the suction unit 74 to the third position where a part of the opening 75 communicates with the hollow portion 72c and a suction force weaker than the first position is generated at the suction port 74 a. When the yarn 20 is connected to the yarn splicing device 13, the driving unit 76 moves the suction unit 74 to the third position. When the yarn 20 is connected to the yarn splicing device 13, the suction of the yarn end of the suction portion 74 is maintained. At this time, if the suction force of the suction portion 74 to the yarn end is large, yarn breakage may occur. Therefore, the suction force can be reduced by positioning the suction portion 74 at the third position where a part of the opening portion 75 communicates with the hollow portion 72 c. Therefore, yarn breakage at the time of piecing can be suppressed.

In the present embodiment, the present invention includes: a cutter 16 that cuts the yarn 20; a yarn monitoring device 17 for monitoring the state of the yarn 20; and a yarn accumulating device 18 for drawing out and accumulating the yarn 20 from the yarn feeding section 6. The yarn splicing device 13 is disposed between the yarn feeding section 6 and the yarn accumulating device 18, and splices the yarn 20 cut between the yarn feeding section 6 and the yarn accumulating device 18. A first catching section 14, a cutter 16, a yarn monitoring device 17, and a yarn accumulating device 18 are arranged in this order downstream of the piecing device 13. According to such a configuration, when the yarn monitoring device 17 detects a yarn defect and cuts the yarn 20 by the cutter 16, the first catching part 14 can reliably catch the cut yarn 20 and guide the caught yarn to the yarn splicing device 13.

In the present embodiment, the first catching part 14 includes the yarn detecting part 78, and the yarn detecting part 78 detects the yarn end sucked by the suction port 74 a. This makes it possible to detect whether or not the yarn end is sucked by the suction unit 74.

The embodiments of the present invention have been described above, but the present invention is not limited to the above embodiments.

As shown in fig. 7, the first capturing unit 90 according to another embodiment includes a base 92, a main body 94, a suction unit 96, a shutter (shutter)98, and a yarn detecting unit 100. The first capturing unit 90 includes a driving unit, not shown. The driving unit has the same configuration as that of the first embodiment, and reciprocates (advances and retreats) the suction unit 96. As the driving section, an air type cylinder may be used.

The body portion 94 is attached to the lower surface of the base 92. The main body 94 supports the suction portion 96 to be capable of reciprocating (slidable).

The suction portion 96 is formed of a cylindrical member. The suction portion 96 reciprocates in the main body portion 94 in the axial direction (longitudinal direction) of the suction portion 96. A suction port 96a is provided at one axial end of the suction portion 96. The suction port 96a takes the yarn 20 into the inside. A negative pressure source is connected to the other axial end of the suction portion 96.

the driving unit moves the suction unit 96 between a first position at which the shutter 98 is opened to open the suction port 96a as shown in fig. 7 and a second position at which the suction port 96a is closed by the shutter 98 as shown in fig. 8. The suction portion 96 generates a suction force when it is located at the first position. The suction portion 96 does not generate a suction force when it is located at the second position.

The shutter 98 opens or closes the suction port 96a in accordance with the movement of the suction portion 96. The shutter 98 is disposed on one end side of the suction portion 96. The shutter 98 is fixed to the base 92 by a mounting member 99. The shutter 98 is swingably provided to the mounting member 99. The shutter 98 swings in accordance with the reciprocation of the suction portion 96. The shutter 98 is biased counterclockwise by a biasing member not shown. The shutter 98 swings clockwise as it is pressed by the suction portion 96. The shutter 98 cooperates with the suction portion 96 to clamp the yarn 20.

the yarn detecting section 100 detects the yarn 20. The yarn detecting portion 100 is attached to the main body portion 94. Specifically, the yarn detecting unit 100 is attached to the main body 94 via an attachment member 99. The yarn detecting section 100 is disposed on the suction port 96a side of the suction section 96. Thereby, the yarn detecting section 100 detects the yarn 20 sucked by the suction section 96.

next, the operation of the first capturing unit 90 will be described. As shown in fig. 8, in a state where the first trap part 90 is on standby, the suction part 96 is located at the second position. In the second position, the suction portion 96 is located on the rear side (at a position where the suction port 96a is away from the yarn passage). At this time, the suction port 96a of the suction portion 96 is closed by the shutter 98.

Thus, no suction force is generated at the suction port 96a of the suction portion 96.

for example, when the yarn monitor 17 detects a yarn defect and the cutter 16 cuts the yarn 20, the first blowing unit 11 blows the yarn 20 on the yarn feeding unit 6 side (the yarn feeding bobbin 21 side) upward.

When the yarn 20 is cut in the first catching part 14, the suction part 96 is moved to the first position by the driving part as shown in fig. 7. In the first position, the suction portion 96 is located on the front side (at a position where the suction port 96a is close to the yarn passage). At this time, the shutter 98 is pressed and opened by the suction portion 96. This causes negative pressure to act on the inside of the suction portion 96, thereby generating suction force.

In the first catching part 90, when the suction part 96 catches the yarn end of the yarn 20 blown by the first blowing part 11, the driving part moves the suction part 96 to the second position. In the second position, one end of the suction portion 96 is located in the vicinity of the yarn detecting portion 100. Thereby, the yarn 20 captured by the suction portion 96 is detected by the yarn detecting portion 100. When the yarn 20 is not detected by the detection unit 100, the suction unit 96 is moved again to the first position in the first catching unit 90, and the yarn 20 is caught again. At the second position, the shutter 98 closes the suction port 96a of the suction portion 96. Thereby, the yarn 20 captured by the suction portion 96 is nipped by the cooperation of the suction portion 96 and the shutter 98. In this state, the yarn splicing device 13 is operated to connect the yarn 20 on the yarn supplying bobbin 21 side captured by the first capturing unit 90 and the yarn 20 on the yarn accumulating device 18 side captured by the second capturing unit 12.

In the first catching part 90, when the joint operation by the joint device 13 is finished, the driving part moves the suction part 96 forward. Thereby, the yarn 20 is released from being pinched (the yarn 20 is caught) by the suction portion 96 and the shutter 98.

In the first catching part 90, the suction part 96 generates a suction force at the suction port 96a at a first position close to the yarn path of the yarn 20, and does not generate a suction force at the suction port 96a at a second position retracted from the yarn path. In this configuration, when the yarn end is not sucked, the suction port 96a can be prevented from generating a suction force by setting the suction portion 96 to the second position. The negative pressure source consumes power when the suction port 96a of the suction unit 96 generates a suction airflow, and suppresses power consumption when the suction port 96a of the suction unit 96 does not generate a suction airflow. Therefore, in the first catching part 90 in which the suction airflow is not generated when the yarn end is not caught, the consumption of the electric power of the negative pressure source can be suppressed. As a result, the winder unit 2 can operate efficiently.

In the above embodiment, the description has been given taking as an example the case where the driving section 76 includes the motor 80 and the driving force transmission mechanism 81. However, the driving unit may be configured to reciprocate the suction units 74 and 96.

for example, a cylinder or the like may be used as the driving unit.

in the above embodiment, the yarn accumulating device 18 may be omitted, and the yarn 20 of the yarn supplying section 6 may be directly wound by the package forming section 8, or the yarn 20 may be caught by the package forming section 8 and introduced into the yarn splicing device 13 when the yarn 20 is broken.

In the above embodiment, the yarn feeding unit 6 is not limited to the tray conveyance type, and may be configured to receive a new supply of the yarn feeding bobbin 21 from the magazine type bobbin supply device. In this configuration, when the bobbin supplying device supplies a new yarn supplying bobbin 21 to the yarn supplying section 6, the bobbin supplying device can also pull out the yarn end from the yarn supplying bobbin 21 and deliver the yarn end to the first blowing section 11. In this case, the auxiliary blowing section 28 can be omitted.

in the above embodiment, the traverse of the yarn 20 by the traverse roller 24 is shown as an example of the package forming section 8, but the present invention is not limited to this. As a method of traversing the yarn 20, an arm-type or belt-type traversing mechanism may be employed. In the above embodiment, the torsion coil spring (not shown) is used, but various elastic members may be used. In the above embodiment, the parallel-shaped package 30 may be wound, or the tapered package 30 may be wound. The material and shape of each structure are not limited to those described above, and various materials and shapes can be used.

Claims (6)

1. a yarn winding device is characterized in that,

The yarn winding device comprises:

A yarn feeding unit on which a yarn feeding bobbin around which a yarn is wound is supported;

A winding unit that winds the yarn drawn out from the yarn supplying bobbin supported by the yarn supplying unit;

A yarn end blowing section that feeds the yarn end of the yarn supplying bobbin to the winding section side by a blown air flow; and

A yarn catching section that catches the yarn end conveyed by the yarn end blowing section,

the yarn catching section includes:

a main body portion; and

a suction part composed of a cylindrical member, a suction port for sucking the yarn being formed in the suction part,

The suction portion is provided so as to be linearly movable in the main body portion in a reciprocating manner in an axial direction of the tubular member, generates a suction force at the suction port at a first position close to a yarn path of the yarn moving from the yarn feeding portion to the winding portion, and does not generate a suction force at the suction port at a second position retracted from the yarn path,

The yarn catching section includes a shutter that opens or closes the suction port in accordance with movement of the suction section,

The yarn catching part is provided with a driving part for reciprocating the suction part,

The driving section moves the suction section to the first position and the second position,

The main body part has a hollow part which divides and forms a space where the suction part is located and which is made negative in pressure by a negative pressure source,

The suction part is provided with the suction port at one end in the axial direction, the other end is closed, an opening part communicated with the inside is arranged between the one end and the other end,

The driving unit moves the suction unit to the first position where the opening communicates with the hollow portion and the second position where the opening is closed by the body.

2. The yarn takeup device according to claim 1,

The yarn winding device includes a yarn splicing device for connecting the yarn of the yarn supplying bobbin captured by the yarn capturing section to the yarn wound on the winding section,

The driving unit is configured to be capable of moving the suction unit to the first position and the second position, and also capable of moving the suction unit to a third position where a part of the opening communicates with the hollow portion to generate a suction force weaker than the first position at the suction port,

The driving portion moves the suction portion to the third position when the yarn is connected by the yarn connecting device.

3. Yarn winding device according to claim 2,

The yarn winding device comprises:

a cutter that cuts the yarn; and

a yarn monitoring device that monitors a state of the yarn,

the yarn splicing device is disposed between the yarn feeding unit and the winding unit, splices the yarn cut between the yarn feeding unit and the winding unit,

The yarn catching section, the cutter, and the yarn monitoring device are arranged in this order downstream of the yarn splicing device.

4. Yarn winding device according to claim 2,

the yarn winding device comprises:

A cutter that cuts the yarn;

A yarn monitoring device that monitors a state of the yarn; and

A yarn accumulating device for drawing out the yarn from the yarn feeding section and accumulating the yarn,

the yarn splicing device is disposed between the yarn feeding section and the yarn accumulating device, and splices the yarn cut between the yarn feeding section and the yarn accumulating device,

The yarn catching section, the cutter, the yarn monitoring device, and the yarn accumulating device are arranged in this order downstream of the yarn splicing device.

5. the yarn take-up device according to any one of claims 1 to 4,

The yarn catching portion includes a detection portion that detects the yarn end portion sucked by the suction port.

6. A yarn winding device is characterized in that,

The yarn winding device comprises:

a yarn feeding unit on which a yarn feeding bobbin around which a yarn is wound is supported;

A winding unit that winds the yarn drawn out from the yarn supplying bobbin supported by the yarn supplying unit;

A yarn end blowing section that feeds the yarn end of the yarn supplying bobbin to the winding section side by a blown air flow; and

A yarn catching section that catches the yarn end conveyed by the yarn end blowing section,

The yarn catching section includes:

a main body portion; and

A suction part composed of a cylindrical member, a suction port for sucking the yarn being formed in the suction part,

The suction portion is provided so as to be linearly movable in the main body portion in a reciprocating manner in an axial direction of the tubular member, generates a suction force at the suction port at a first position close to a yarn path of the yarn moving from the yarn feeding portion to the winding portion, and does not generate a suction force at the suction port at a second position retracted from the yarn path,

The yarn catching section includes a shutter that opens or closes the suction port in accordance with movement of the suction section,

The yarn catching part is provided with a driving part for reciprocating the suction part,

The driving unit moves the suction unit to a first position where the shutter is opened to open the suction port and a second position where the suction port is closed by the shutter.