CN112079201A - Yarn processing method and yarn processing device - Google Patents
Yarn processing method and yarn processing device Download PDFInfo
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- CN112079201A CN112079201A CN202010447581.9A CN202010447581A CN112079201A CN 112079201 A CN112079201 A CN 112079201A CN 202010447581 A CN202010447581 A CN 202010447581A CN 112079201 A CN112079201 A CN 112079201A
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- yarn
- unit
- suction
- feeding bobbin
- bobbin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
- B65H67/08—Automatic end-finding and material-interconnecting arrangements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H65/00—Securing material to cores or formers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H67/00—Replacing or removing cores, receptacles, or completed packages at paying-out, winding, or depositing stations
- B65H67/04—Arrangements for removing completed take-up packages and or replacing by cores, formers, or empty receptacles at winding or depositing stations; Transferring material between adjacent full and empty take-up elements
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/30—Handled filamentary material
- B65H2701/31—Textiles threads or artificial strands of filaments
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- Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
- Knitting Machines (AREA)
Abstract
The invention provides a yarn processing method and a yarn processing apparatus. A yarn processing method implemented in a yarn processing device (70) provided with a first suction device (73), a cutting device (75), an upper pressure lever (79A) and a second suction device (87), comprising the steps of: a step of switching a cutting device (75) and starting the suction of the yarn (Y) of the yarn feeding tube (11A) by a first suction device (73); and a step of starting the operation of the upper pressure lever (79A) and bringing the upper pressure lever (79A) into contact with the yarn feeding bobbin (11A) when a predetermined time has elapsed after the first suction device (73) starts suction.
Description
Technical Field
The present invention relates to a yarn processing method and a yarn processing apparatus.
Background
In a spinning machine or the like, a yarn supply bobbin formed by winding a yarn around a bobbin is wound into a package in a yarn winder of an automatic winder. In general, a yarn end treatment is performed on a yarn end of a yarn feeding bobbin supplied to a yarn winding machine so that the yarn winding machine can perform a treatment for winding the yarn of the yarn feeding bobbin as a package so as to be in a predetermined state.
As such a yarn end processing method, for example, japanese patent application laid-open No. 2017-193435 discloses a technique of processing a yarn end by winding the yarn end an arbitrary number of times on an upper portion of a yarn supplying tube and then inserting the yarn end into the inside of the tube.
In a conventional yarn processing method, when a yarn is drawn by sucking a yarn feeding bobbin and a predetermined amount of yarn is drawn by a sensor, an operation of pressing the yarn against a lever of the yarn feeding bobbin is started so as not to draw more yarn from the yarn feeding bobbin. Therefore, in the conventional yarn processing method, the yarn is continuously drawn out from the yarn feeding bobbin from the time when the sensor detects the yarn end to the time when the lever presses the yarn against the yarn feeding bobbin. In the continuously drawn yarn, a portion of a predetermined length or more is cut to become a yarn end.
Disclosure of Invention
An object of one aspect of the present invention is to provide a yarn processing method and a yarn processing apparatus capable of reducing the amount of yarn ends generated.
A yarn processing method according to an aspect of the present invention includes: a first suction unit which is provided above the yarn feeding bobbin and sucks the yarn of the yarn feeding bobbin; a switching unit that switches on/off of air conduction of the yarn feeding bobbin by the first suction unit; a cutting unit that cuts the yarn sucked by the first suction unit; a holding section that moves close to and away from the yarn feeding bobbin and presses a part of the yarn sucked by the first suction section against the yarn feeding bobbin by contacting the yarn feeding bobbin; a second suction part which is connected with the lower part or the lower part of the reelpipe of the yarn supply pipe and penetrates the yarn into the reelpipe from the upper end of the reelpipe; and a control unit that controls a yarn processing method performed in the yarn processing device of the first suction unit, the switching unit, the cutting unit, the holding unit, and the second suction unit, the control unit including: a switching unit for starting the suction of the yarn on the yarn feeding bobbin by the first suction unit; and starting the operation of the holding section and bringing the holding section into contact with the yarn feeding bobbin when it is determined that the predetermined time has elapsed after the first suction section starts suction.
In the yarn processing method according to one aspect of the present invention, when it is determined that the predetermined time has elapsed after the first suction unit starts suction, the operation of the holding unit is started and the holding unit is brought into contact with the yarn feeding bobbin. In this way, in the yarn processing method, after the yarn starts to be drawn out from the yarn feeding bobbin, the holding portion is operated after the predetermined time has elapsed to bring the holding portion into contact with the yarn feeding bobbin, and the yarn can be stopped from being drawn out from the yarn feeding bobbin at an appropriate timing when the predetermined length is secured. Thus, in the yarn processing method, the length of the yarn sucked by the first suction portion can be shortened as compared with a case where the operation of the holding portion is started after the yarn is detected. Therefore, in the yarn processing method, the length of the yarn cut by the cutting portion and discarded can be shortened. Therefore, the yarn processing method can reduce the amount of yarn ends generated.
In one embodiment, the yarn processing apparatus may further include: the detection unit that detects the yarn sucked by the first suction unit may include a step of switching the operation of the cutting unit based on a detection result of the detection unit after the start of the operation of the holding unit. In this method, since the yarn can be cut by the cutting unit when the yarn is detected by the detection unit, a predetermined length of yarn that can be inserted into the winding pipe of the yarn feeding bobbin can be reliably secured.
In one embodiment, the control unit may set the predetermined time based on a detection result of the detection unit, or the holding unit may be operated based on the predetermined time set by the control unit. In this method, since the predetermined time is set based on the detection result, it is possible to reliably secure a predetermined length of yarn that can be inserted into the interior of the winding pipe of the yarn feeding bobbin.
In one embodiment, the method may further include the step of acquiring a predetermined time that has been input to the input unit, and the holding unit may be operated based on the acquired predetermined time. In this method, the predetermined time can be set appropriately by an operator or the like.
A yarn processing device according to one aspect of the present invention includes: a first suction unit which is provided above the yarn feeding bobbin and sucks the yarn of the yarn feeding bobbin; a switching unit that switches on/off of air conduction of the yarn feeding bobbin by the first suction unit; a cutting unit that cuts the yarn sucked by the first suction unit; a holding section that moves close to and away from the yarn feeding bobbin and presses a part of the yarn sucked by the first suction section against the yarn feeding bobbin by contacting the yarn feeding bobbin; a second suction part which is connected with the lower part or the lower part of the reelpipe of the yarn supply pipe and penetrates the yarn into the reelpipe from the upper end of the reelpipe; and a control unit that controls the first suction unit, the switching unit, the cutting unit, the holding unit, and the second suction unit, wherein the control unit switches the switching unit such that the first suction unit starts suction of the yarn from the yarn feeding bobbin, and when it is determined that a predetermined time has elapsed after the first suction unit starts suction, the control unit starts operation of the holding unit and brings the holding unit into contact with the yarn feeding bobbin.
In the yarn processing device according to one aspect of the present invention, when it is determined that the predetermined time has elapsed after the first suction unit starts suction, the operation of the holding unit is started and the holding unit is brought into contact with the yarn feeding bobbin. In this way, in the yarn processing device, after the yarn starts to be drawn out from the yarn feeding bobbin, the holding portion is operated to contact the yarn feeding bobbin after a predetermined time has elapsed, and the yarn can be stopped from being drawn out from the yarn feeding bobbin at an appropriate timing when a predetermined length is secured. Thus, in the yarn processing device, the length of the yarn sucked by the first suction portion can be shortened as compared with a case where the operation of the holding portion is started after the yarn is detected. Therefore, in the yarn processing device, the length of the yarn cut by the cutting portion and discarded can be shortened. Therefore, the yarn processing device can reduce the amount of yarn ends generated.
According to an aspect of the present invention, the amount of thread ends generated can be reduced.
Drawings
Fig. 1 is a plan view of a yarn winding system including a yarn processing device according to an embodiment.
Fig. 2 is a schematic view of an automatic winder included in the yarn winding system of fig. 1.
Fig. 3 is a side view of a winder unit included in the automatic winder of fig. 2.
Fig. 4A is a perspective view of a conveyance tray conveyed in the automatic winder of fig. 1.
Fig. 4B is a perspective view of the roller tube attached to the conveying tray.
Fig. 4C is a perspective view of the yarn feeding bobbin attached to the transport tray.
Fig. 4D is a perspective view of the yarn feeding bobbin mounted on the conveyance tray and ready for use.
Fig. 5 is a perspective view of a yarn processing apparatus according to an embodiment.
Fig. 6 is a side view of the yarn processing apparatus according to the embodiment as viewed from the upstream side in the conveyance direction of the yarn feeding bobbin.
Fig. 7 is a functional block diagram showing a functional configuration of the yarn winding system.
Fig. 8 is a view showing a flow chart of yarn processing in the yarn processing device.
Fig. 9A is a view showing a yarn process in the yarn processing apparatus.
Fig. 9B is a view showing a yarn process in the yarn processing apparatus.
Fig. 9C is a view showing a yarn process in the yarn processing apparatus.
Fig. 9D is a view showing a yarn process in the yarn processing apparatus.
Fig. 10 is a perspective view showing an upper presser bar of a yarn processing apparatus according to another embodiment.
Fig. 11A is a view showing a state where the upper presser bar is in contact with the yarn feeding bobbin.
Fig. 11B is a view showing a state where the upper presser bar is in contact with the yarn feeding bobbin.
Detailed Description
Preferred embodiments of the present invention will be described below 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.
As shown in fig. 1, the yarn winding system 1 includes: an automatic winder 3, a bobbin transfer device 5, a bobbin supply device 51, a yarn end processing device 53, and a bobbin drawing device 55.
The automatic winder 3 is a device that extracts the yarn Y from a prepared yarn supply bobbin 11B (see fig. 4 (d)) having disposed the yarn end Y1 inside the roller tube 12c of the roller tube 12 and winds the yarn Y as a package P. As shown in fig. 1 and 2, the automatic winder 3 includes an end frame 20, a plurality of (e.g., 24) winder units (yarn winders) 30, and a doffing carriage 45. The end frame 20 includes a display unit 21 such as a display, an operation unit (input unit) 22 such as an input key, and a base control unit 23 that controls the operation of the automatic winder 3. The display unit 21 displays the operating status of each winder unit 30. The operator sets the operating conditions of the winder units 30 and the yarn processing conditions of the yarn processing device 70 through the operation unit 22.
The base control Unit (control Unit of the present invention) 23 is composed of a CPU (Central Processing Unit), a ROM (Read Only Memory), a RAM (Random Access Memory), and the like. The base control unit 23 executes various control processes in the automatic winder 3 and the yarn processing device 70. A program stored in the ROM, for example, is loaded onto the RAM and executed by the CPU to perform such various control processes. In the present embodiment, the base control unit 23 has a feature in controlling the yarn processing of the yarn processing device 70.
As shown in fig. 7, the base control section 23 controls the bobbin detection sensor 89, the yarn detection sensor (detection section) 73F, the movable flapper driving section 75D, the cylinder driving section 77D, the rod driving section 79D, the rod driving section 81B, the nozzle driving section 85B, and the suction flapper driving section 87D. The base control unit 23 can receive the reverse rotation amount of the yarn feeding bobbin 11B prepared in the yarn processing control via the operation unit 22. The base control portion 23 can execute the separation processing of the upper presser bar 79A based on the reverse rotation amount input from the operation portion 22.
As shown in fig. 1 and 2, the winder units 30 are arranged in a single direction, and unwind the yarn Y from the prepared yarn supply bobbin 11B shown in fig. 4D to form a package P. As shown in fig. 3, the winder unit 30 includes: a winding device 31, a tension applying device 32, a yarn monitoring device 33, an upper yarn catching device 34, a lower yarn catching device 35, a yarn splicing device 36, and a unit control section 40 (see fig. 2).
The winding device 31 includes a cradle 31a and a winding drum 31 b. The cradle 31a supports the package P. The winding drum 31b rotates the package P while traversing the yarn Y. Thereby, the yarn Y is wound from the prepared yarn feeding bobbin 11B mounted at the predetermined position to form the package P. The tension applying device 32 applies a predetermined tension to the yarn Y travelling from the yarn feeding bobbin 11B having completed the preparation to the package P.
The yarn monitoring device 33 monitors the running yarn Y in order to detect a yarn defect (e.g., an abnormal thickness of the yarn Y, a foreign substance mixed into the yarn Y, etc.). When a yarn defect is detected, the yarn Y is cut by a cutter provided separately. When the yarn Y is cut, the upper yarn catching device 34 catches the yarn end of the yarn Y on the package P side and guides the yarn end to the yarn splicing device 36. When the yarn Y is cut, the lower yarn catching device 35 catches the yarn end of the yarn Y on the yarn feeding bobbin 11B side that has been prepared, and guides the yarn end to the yarn joining device 36. The yarn joining device 36 connects the yarn ends guided by the upper yarn catching device 34 and the lower yarn catching device 35 to each other.
The unit control section 40 shown in fig. 2 is constituted by a CPU, ROM, RAM, and the like. The unit control section 40 executes various control processes in the winder unit 30. A program stored in the ROM, for example, is loaded onto the RAM and executed by the CPU to perform the various control processes described above.
The doffing carriage 45 is movable in the arrangement direction (one direction) of the winder unit 30, and performs a package removing operation of removing the package P that becomes full in the winder unit 30, and a yarn winding operation of mounting a reel pipe for winding the yarn Y and sandwiching the yarn Y of the yarn supply bobbin 11B that has been prepared between the reel pipe and the cradle 31a (the yarn of the yarn supply bobbin is disposed on the reel pipe).
The bobbin transfer device 5 is configured to transfer the bobbin supply bobbin 11A (see fig. 4C) in a state in which the yarn Y is wound around the winding pipe 12 supplied from the spinning machine or the like in the upstream process, the yarn supply bobbin 11B (see fig. 4D) in which the preparation is completed, and the use end bobbin 13 (see fig. 4B) in which a part or all of the yarn Y is drawn out from the yarn supply bobbin 11B in which the preparation is completed by the winder unit 30, while being attached to the transport tray 9. Fig. 4B shows the end-of-use bobbin 13 in a state where all the yarn Y is drawn out from the yarn feeding bobbin 11B that has completed the preparation.
As shown in fig. 4A, the conveyance tray 9 includes: a disk-shaped base portion 91, a projecting portion 92 projecting upward from the base portion 91, and a pin 93 projecting further upward from the projecting portion 92. By inserting the pin 93 into the lower portion 12a of the roller pipe 12, the yarn feeding pipe 11A, the prepared yarn feeding pipe 11B, and the end-of-use bobbin 13 are mounted on the transport tray 9 with one end of the roller pipe 12 facing upward. In other words, the transport tray 9 is configured to be able to place the yarn feeding bobbin 11A, the prepared yarn feeding bobbin 11B, and the use end bobbin 13 in an upright state in which the axial directions of the yarn feeding bobbin 11A, the prepared yarn feeding bobbin 11B, and the use end bobbin 13 are vertical.
As shown in fig. 1, the bobbin transfer device 5 includes: a first conveying section 61 as a conveying path of the yarn feeding bobbin 11B which has been prepared, a plurality of second conveying sections 62 branched from the first conveying section 61, a third conveying section 63 as a conveying path of the end-of-use bobbin 13 provided on the downstream side of the plurality of second conveying sections 62, a fourth conveying section 64 which connects the first conveying section 61 and the third conveying section 63 to form a circulating path, and a fifth conveying section 65 branched from the downstream side of a yarn end processing device 53 described later of the fourth conveying section 64 and merged on the upstream side of the bobbin drawer device 55.
The first conveying section 61, the second conveying section 62, and the third conveying section 63 are constituted by a conveyor for transferring the conveying tray 9 along the conveying path, a conveyor driving device, a path defining plate, and the like. The fourth conveying section 64 and the fifth conveying section 65 are configured by a circular belt, a belt driving device, a pulley, a path defining plate, and the like for conveying the conveying tray 9 along these conveying paths.
The bobbin supplying device 51 is disposed to face the conveyance path of the fourth conveyance section 64. The bobbin supplying device 51 supplies the yarn feeding bobbin 11A formed in a previous step such as a spinning machine to the conveyance path of the bobbin transfer device 5. That is, the bobbin supplying device 51 mounts the yarn feeding bobbin 11A on the transport tray 9 transported by the fourth transporting section 64.
The yarn end processing device 53 is disposed to face the conveyance path of the fourth conveyance section 64. The yarn end processing device 53 includes: a rotary cutter 53A for forming a yarn end Y1 in the yarn feeding bobbin 11A, a yarn end peeling device 53B for peeling off the yarn end Y1 from the surface of the yarn layer of the yarn feeding bobbin 11A, and a yarn processing device 70, wherein the yarn processing device 70 unwinds a part of the yarn end Y1 to form a ready yarn feeding bobbin 11B for disposing the yarn end Y1 in the roller tube inner part 12 c. The rotary cutter 53A, the yarn end peeling device 53B, and the yarn processing device 70 are arranged in this order from the upstream side along the conveyance path of the fourth conveyance section 64.
The bobbin drawing device 55 collects the used bobbin 13 conveyed by the bobbin transfer device 5. That is, the bobbin extracting device 55 extracts the used bobbin 13, which is conveyed by the fourth conveying unit 64 in a state of being attached to the conveying tray 9, from the conveying tray 9. Further, a discrimination device 55A for discriminating whether or not the yarn Y is wound around the roller tube 12, that is, whether or not the roller tube 12 attached to the conveyance tray 9 is the used-end bobbin 13 is disposed on the upstream side of the bobbin extracting device 55. Here, the used bobbin 13 discharged from the winder unit 30 and the yarn feeding bobbin 11A conveyed via the fifth conveying unit 65 after the yarn end processing in the yarn end processing device 53 has failed are conveyed to the bobbin drawer device 55. The bobbin extracting device 55 extracts the used bobbin 13 from the transport tray 9 only when the discrimination result of the discrimination device 55A is the used bobbin 13.
As shown in fig. 1, the yarn processing device 70 is disposed to face a predetermined position P1 of the fourth conveying section 64. As shown in fig. 5 and 6, the yarn processing device 70 includes: a housing 71, a first suction device (first suction unit) 73, a cutter-equipped flapper (switching unit) 75, a lifting device 77, a holding device 79, a bobbin supporting device 81, a blowing device 85, a second suction device (second suction unit) 87, and a bobbin detection sensor 89.
The first suction device 73 sucks the yarn end Y1 of the yarn feeding bobbin 11A upward. The first suction device 73 has: a cylindrical body 73A disposed above the yarn feeding bobbin 11A stopped at a predetermined position P1 of the fourth conveying section 64, a bellows tube 73B connected to an upper portion of the cylindrical body 73A so as to be capable of expanding and contracting, and a suction pipe 73C connected to an upper portion of the bellows tube 73B via a knife-equipped flapper 75 described later. The suction pipe 73C is connected to an airflow generation source 73D that generates a suction airflow (suction force) for sucking the yarn end Y1. The airflow generation source 73D is a blower that generates a suction airflow in the winder unit 30 provided in the end frame 20. The first suction device 73 and the winder unit 30 use a common blower. Of course, a blower dedicated to the first suction device 73 may be additionally provided. The opening/closing (presence/absence of suction) of the air conduction of the yarn Y in the cylinder 73A is switched depending on the position of the movable flapper 75C described later.
A guide 73E for guiding the sucked yarn end Y1 to a predetermined position is disposed on the inner corner side of the bent portion of the suction pipe 73C. The guide 73E stabilizes the yarn passage of the yarn end Y1. A yarn detection sensor 73F for detecting the presence or absence of the yarn Y is disposed inside the suction pipe 73C. The signal output from the yarn detection sensor 73F is output to the base control unit 23.
The knife flapper 75 is a device that is disposed between the bellows tube 73B and the suction tube 73C, cuts the yarn Y sucked by the first suction device 73 in the middle, and switches the opening and closing of the air conduction in the cylinder 73A. The knife guard 75 includes an upper plate 75A, a lower plate 75B, and a movable guard 75C. A cutting portion 76 for cutting the yarn Y is provided around the movable flapper 75C. The upper plate 75A and the lower plate 75B are disposed between the bellows tube 73B and the suction pipe 73C. The upper plate 75A and the lower plate 75B are provided with communication holes for communicating the bellows tube 73B and the suction pipe 73C. The movable flapper 75C can cut the yarn Y passing through the communication hole by the cutting portion 76 and can block the air flow in a state where the yarn Y is cut. The movable flapper 75C is operated by a movable flapper driving unit 75D such as an actuator. The movable flapper driving portion 75D is controlled by the base control portion 23. The base control section 23 controls the movable flapper driving section 75D so that the cutting section 76 of the movable flapper 75C cuts the yarn Y.
The lifting device 77 is a device capable of moving the lower end of the cylinder 73A. The lifting device 77 includes an arm 77A, a guide 77B, and a cylinder 77C. One end of the arm 77A is connected to the cylinder 73A, and the other end is fixed to the rod of the cylinder 77C. The arm 77A is formed with a through hole through which the guide 77B is inserted via a slide bearing or the like. The guide 77B is a column extending in the vertical direction, and is inserted into a through hole formed in the arm 77A. The air cylinder 77C is a mechanism for moving the arm 77A in the vertical direction along the guide 77B, and the arm 77A is connected to the tip of an extendable rod. The cylinder 77C is operated by a cylinder driving unit 77D such as an electromagnetic valve. The cylinder driving unit 77D is controlled by the base control unit 23. The base control unit 23 drives the air cylinder driving unit 77D so that the air cylinder 77C operates based on a signal output from the yarn detection sensor 73F, for example.
The holding device 79 is a device that holds the yarn Y sucked by the first suction device 73. The holder 79 has an upper press bar 79A. The upper presser bar 79A holds the yarn Y unwound from the yarn layer of the yarn feeding bobbin 11A and sucked by the suction pipe 73C, on the side of the bobbin upper portion 12b of the yarn feeding bobbin 11A. The upper presser bar 79A has a holding portion 79Aa that contacts the roller tube upper portion 12b to hold the yarn Y. The holding portion 79Aa is formed integrally with the upper presser bar 79A, and a part of the upper presser bar 79A is bent to form the holding portion 79 Aa.
The upper presser bar 79A is rotatably supported by a support portion 71A fixed to the housing 71, and brings the holding portion 79Aa into contact with or away from the side of the roller tube upper portion 12b in the yarn feeding tube 11A. The upper press lever 79A is operated by a lever driving portion 79D such as an actuator. The lever driving portion 79D is controlled by the base control portion 23. For example, the base control portion 23 drives the lever drive portion 79D so as to move the upper presser bar 79A closer to each other based on a signal output from the yarn detecting sensor 73F and to move the upper presser bar 79A away from each other at the time when the prepared yarn feeding bobbin 11B is reversed.
The bobbin supporting device 81 is a device that presses a portion of the yarn Y not wound around the lower portion of the yarn feeding bobbin 11A in order to prevent the yarn feeding bobbin 11A from being pulled out from the transport tray 9 when the yarn feeding bobbin 11A is subjected to yarn processing (particularly, when the yarn Y of the yarn feeding bobbin 11A is unwound by the cylinder 73A). The bobbin supporting device 81 has a lower presser bar 81A. The lower presser bar 81A is rotatably supported and contacts the lower portion of the yarn feeding bobbin 11A, thereby holding the yarn feeding bobbin 11A. The lower presser bar 81A is operated by a lever driving section 81B such as an actuator. The lever driving section 81B is controlled by the base control section 23. The base control unit 23 controls the lever driving unit 81B so as to hold the yarn feeding bobbin 11A at the time when the bobbin detection sensor 89 detects the yarn feeding bobbin 11A and to release the holding of the yarn feeding bobbin 11A at the time when the upper pressing lever 79A finishes the separating operation, for example.
The blowing device 85 has blowing nozzles 85A disposed at positions on both sides of the yarn feeding bobbin 11A held and stopped at the predetermined position P1. Each of the blowing nozzles 85A jets compressed air obliquely upward and obliquely downward toward the yarn feeding bobbin 11A. The blowing air blown from the blowing nozzle 85A blows up, for example, the yarn Y hanging down from the yarn layer of the yarn feeding bobbin 11A. The nozzle driving unit 85B switches whether or not the compressed air is discharged from the blow nozzle 85A. The nozzle driving unit 85B is controlled by the base control unit 23. The base control unit 23 controls the nozzle driving unit 85B to discharge the compressed air from the blowing nozzle 85A, for example, at the timing when the bobbin detection sensor 89 detects the yarn feeding bobbin 11A.
The second suction device 87 is a device for threading the yarn end Y1 of the cut yarn Y into the bobbin inside 12C of the yarn feeding bobbin 11A when the yarn Y is cut by the cutting portion 76 of the movable flapper 75C. The second suction device 87 includes a suction tube 87A and a suction baffle 87B. The suction pipe 87A is connected to an air flow generation source 87C such as a blower that generates an air flow for sucking the yarn Y. The upper end opening of the suction tube 87A faces the center of the lower surface of the conveyance tray 9 on which the yarn feeding tube 11A stopped at the predetermined position P1 is placed. The suction flap 87B is operated by a suction flap driving unit 87D such as an actuator. The suction barrier driving unit 87D is controlled by the base control unit 23. The base control unit 23 controls the suction flap driving unit 87D so that the yarn Y can be sucked at the timing when the cutter flap 75 is operated to cut the yarn Y by the cutting unit 76, for example.
The bobbin detection sensor 89 detects the presence or absence of the yarn feeding bobbin 11A (conveyance tray 9) stopped at the predetermined position P1 of the fourth conveying section 64. The signal output from the bobbin detection sensor 89 is output to the base control section 23.
Next, the operation (yarn processing method) of the yarn processing device 70 will be described with reference to fig. 8 and fig. 9A to 9D. When the yarn feeding bobbin 11A is conveyed to the predetermined position P1 with respect to the yarn processing device 70, the conveyance tray 9 is held by a stopper not shown. As shown in fig. 8, the base control unit 23 determines whether or not the bobbin supply tube 11A is detected by the bobbin detection sensor 89 (step S01). When the base control unit 23 determines that the bobbin detection sensor 89 has not detected the yarn feeding bobbin 11A (no in step S01), the process is terminated.
When the base control unit 23 determines that the bobbin supply tube 11A is detected by the bobbin detection sensor 89 (yes in step S01), the lower presser bar 81A is operated (step S02). Specifically, the base control section 23 controls the lever driving section 81B so that the lower presser bar 81A contacts the lower portion of the yarn feeding bobbin 11A. Thereby, the lower portion of the yarn feeding bobbin 11A is held by the lower presser bar 81A.
Next, the base controller 23 operates the blowing device 85 (step S03). Specifically, the base controller 23 controls the nozzle driver 85B so that the compressed air is discharged from the blowing nozzle 85A. Thereby, as shown in fig. 9A, the blowing nozzle 85A starts the discharge of the compressed air, and blows the yarn Y toward the upper side of the yarn feeding bobbin 11A.
When the base controller 23 conveys the yarn feeding bobbin 11A to the predetermined position P1 with respect to the yarn processing device 70, the movable flag 75C is operated (step S04). Specifically, the base control unit 23 controls the movable flapper driving unit 75D so that the movable flapper 75C moves to the passage open position. Thus, as shown in fig. 9A, the suction pipe 73C and the cylindrical body 73A communicate with each other via the knife-equipped shutter 75 and the bellows tube 73B, and the suction airflow acts on the cylindrical body 73A. Thereby, an upward suction airflow acts on the peripheral surface of the yarn feeding bobbin 11A, and the yarn end Y1 blown upward by the blowing nozzle 85A is sucked toward the suction pipe 73C.
Next, the base control unit 23 determines whether or not a predetermined time has elapsed from when the movable flapper 75C starts operating (step S05). The start of the operation of the movable flapper 75C is, for example, when a signal indicating that the movable flapper 75C is moving to the passage open position is output from the base control unit 23 to the movable flapper driving unit 75D. The predetermined time is set to, for example, 10msec to 200 msec. The predetermined time is a time when the movable flapper 75C is opened and the sucked yarn end Y1 can reach the position detected by the yarn detection sensor 73F after the suction airflow is applied to the yarn Y. The predetermined time is appropriately set based on the type (count) of the yarn Y and the like. The predetermined time is preferably set to a time at which the yarn end Y1 is detected by the yarn detection sensor 73F and the length of the yarn end Y1 cut by the cutting section 76 of the movable flapper 75C is shortest. The predetermined time may be set by an operator, or the stage control unit 23 may automatically set (change, adjust).
When the predetermined time is set by the operator, the operator performs the test by appropriately changing the predetermined time, and sets the appropriate predetermined time. The operator inputs the set predetermined time to the base control unit 23 through the operation unit 22 (see fig. 1). The base control unit 23 acquires a predetermined time inputted to the operation unit 22. When the base control unit 23 automatically sets the predetermined time, the predetermined time is set to be long (for example, 200msec) at first, for example, and the predetermined time is shortened in stages. The base control unit 23 sets a predetermined time period based on the detection result of the yarn detection sensor 73F. Specifically, the base control unit 23 sets the predetermined time based on whether or not the yarn detection sensor 73F detects (failure rate) the predetermined time.
When the base control unit 23 determines that the predetermined time has elapsed (yes in step S05), it operates the upper pressing lever 79A (step S06). Specifically, the base control unit 23 controls the lever driving unit 79C such that the upper pressure lever 79A contacts the yarn feeding bobbin 11A and the bobbin upper part 12b (performs a proximity operation). As a result, as shown in fig. 9B, the upper presser bar 79A contacts the roller pipe upper part 12B of the yarn feeding pipe 11A, and the yarn Y is pressed against the roller pipe upper part 12B by the upper presser bar 79A. Therefore, the yarn Y is not drawn out from the yarn supplying bobbin 11A. If the base control unit 23 does not determine that the predetermined time has elapsed (no in step S05), the process of step S05 is repeated.
After the upper presser bar 79A is operated, the base control unit 23 determines whether or not the yarn end Y1 is detected based on the detection result of the yarn detection sensor 73F (step S07). When the base control unit 23 determines that the yarn end Y1 is detected by the yarn detection sensor 73F (yes in step S07), the suction flaps 87B are operated (step S08). Specifically, the base control unit 23 controls the suction flap driving unit 87D so that the suction flap 87B is opened. This causes a downward suction airflow to act on the coil pipe inner portion 12 c. When the base controller 23 does not determine that the yarn end Y1 is detected by the yarn detecting sensor 73F (no in step S07), the upper presser bar 79A is separated, and the process is repeated again from step S04. At this time, the raising and lowering device 77 moves the cylinder 73A up and down to increase the success rate of the yarn end Y1.
The base control unit 23 operates the movable flapper 75C simultaneously with the operation of the suction flapper 87B (step S09). Specifically, the base control unit 23 controls the movable flapper driving unit 75D to move the movable flapper 75C to the passage closing position. Thereby, as shown in fig. 9C, the yarn Y is cut by the cutting portion 76 of the movable flapper 75C. At the same time, the lower end of the suction pipe 73C is blocked by the movable flapper 75C, and the suction airflow in the cylinder 73A is blocked. As shown in fig. 9D, the yarn end Y1 of the yarn Y cut by the cutting section 76 is sucked into the tube interior 12c of the yarn feeding tube 11A by the suction airflow of the suction tube 87A.
Next, the base control unit 23 operates the suction flap 87B (step S10). Specifically, the base control unit 23 controls the suction flap driving unit 87D to close the suction flap 87B. Thereby, the suction airflow in the suction tube 87A is blocked. Next, the base control portion 23 operates the upper pressing lever 79A (step S11). Specifically, the base control unit 23 controls the lever driving unit 79C so that the upper pressure lever 79A is separated from the bobbin upper part 12b of the yarn feeding bobbin 11A (separated operation). Thereby, the upper presser bar 79A is returned to the standby position away from the yarn feeding bobbin 11A.
Further, the base control unit 23 operates the lower pressing lever 81A (step S12). Specifically, the base control unit 23 controls the lever driving unit 81B so that the lower presser lever 81A is spaced apart from the yarn feeding bobbin 11A. Thereby, the lower presser bar 81A releases the holding of the yarn feeding bobbin 11A. Further, the stopper holding the conveyance tray 9 stopped is moved to the standby position. Thereby, the transport tray 9 stopped at the predetermined position P1 starts moving. That is, the prepared yarn supplying bobbin 11B is supplied to the winder unit 30.
Here, in the processing of step S07, when the yarn end Y1 is not detected by the yarn detection sensor 73F for a predetermined time or longer, the following processing is performed. Specifically, the base control portion 23 controls the lever driving portion 79C so as to move the upper pressing lever 79A away from each other. Thereby, the upper presser bar 79A is returned to the standby position away from the yarn feeding bobbin 11A. Next, the base control unit 23 operates the air cylinder 77C. Thereby, the cylinder 73A is lowered via the arm 77A moving downward. As the cylinder 73A descends, an upward suction airflow acts on the circumferential surface of the yarn feeding bobbin 11A.
Next, when the yarn detection sensor 73F detects that the yarn Y is sucked into the suction pipe 73C, the base control unit 23 operates the suction flapper 87B. Further, the base control unit 23 operates the air cylinder 77C to move the cylinder 73A to the standby position. When the cylinder 73A returns to the standby position, the base control portion 23 operates the upper pressing lever 79A. Thereby, the upper presser bar 79A contacts the roller pipe upper part 12b of the yarn feeding pipe 11A, and the yarn Y is held by the roller pipe upper part 12b by the upper presser bar 79A.
Next, the base control unit 23 operates the movable flapper 75C. Specifically, the base control unit 23 controls the movable flapper driving unit 75D so as to move the movable flapper 75C to the passage closing position. Thereby, the yarn Y is cut by the cutting portion 76 of the movable flapper 75C. At the same time, the lower end of the suction pipe 73C is blocked by the movable flapper 75C, and the suction airflow in the cylinder 73A is blocked. The yarn end Y1 of the yarn Y cut by the cutting section 76 is sucked into the bobbin interior 12c of the yarn feeding bobbin 11A by the suction air of the suction tube 87A.
Subsequently, the base controller 23 operates the suction flapper 87B. Specifically, the base control unit 23 controls the suction flap driving unit 87D so as to close the suction flap 87B. Thereby, the suction airflow in the suction tube 87A is blocked. Next, the base control portion 23 operates the upper presser bar 79A. Specifically, the base control unit 23 controls the lever driving unit 79C so that the upper pressure lever 79A is separated from the bobbin upper part 12b of the yarn feeding bobbin 11A (separated operation). Thereby, the upper presser bar 79A is returned to the standby position away from the yarn feeding bobbin 11A.
Further, the base control portion 23 operates the lower presser bar 81A. Specifically, the base control unit 23 controls the lever driving unit 81B so that the lower presser lever 81A is spaced apart from the yarn feeding bobbin 11A. Thereby, the lower presser bar 81A releases the holding of the yarn feeding bobbin 11A. Further, the stopper holding the conveyance tray 9 stopped is moved to the standby position. Thereby, the transport tray 9 stopped at the predetermined position P1 starts moving. That is, the prepared yarn supplying bobbin 11B is supplied to the winder unit 30.
As described above, in the yarn processing method of the yarn processing device 70 according to the present embodiment, when it is determined that the predetermined time has elapsed after the movable flapper 75C is opened and suction is started in the first suction device 73, the upper presser bar 79A is operated to bring the upper presser bar 79A into contact with the yarn feeding bobbin 11A. In this way, in the yarn processing method, after the yarn Y starts to be drawn out from the yarn feeding bobbin 11A, the upper presser bar 79A is operated to bring the upper presser bar 79A into contact with the yarn feeding bobbin 11A after the elapse of the predetermined time, and the yarn drawing from the yarn feeding bobbin 11A can be stopped at an appropriate timing at which the predetermined length is secured. Thus, in the yarn processing method, the length of the yarn Y sucked by the first suction device 73 can be shortened as compared with a case where the operation of the upper presser bar 79A is started after the yarn Y is detected. Therefore, in the yarn processing method, the length of the yarn Y cut by the cutting portion 76 of the movable flapper 75C and discarded can be shortened. Therefore, the yarn processing method can reduce the amount of yarn ends generated.
The yarn processing device 70 of the present embodiment includes a yarn detection sensor 73F that detects a yarn end Y1 of the yarn Y sucked by the first suction device 73. In the yarn processing method, after the operation of the upper presser bar 79A is started, the operation of the movable flapper 75C is switched based on the detection result of the yarn detection sensor 73F. In this method, when the yarn Y is detected by the yarn detection sensor 73F, the yarn can be cut by the cutting portion 76 of the movable flapper 75C, so that a predetermined length of the yarn Y that can be inserted into the roller tube interior 12C of the yarn feeding bobbin 11A can be reliably secured.
In the yarn processing method of the yarn processing device 70 according to the present embodiment, the base control portion 23 sets a predetermined time based on the detection result of the yarn detection sensor 73F, and operates the upper presser bar 79A based on the predetermined time set by the base control portion 23. In this method, since the predetermined time is set based on the detection result of the yarn detection sensor 73F, the yarn end Y1 of the predetermined length that can be inserted into the roller tube inner portion 12c of the yarn feeding bobbin 11A can be reliably secured.
In the yarn processing method of the yarn processing device 70 of the present embodiment, the predetermined time that has been input to the operation portion 22 may be acquired, and the upper presser bar 79A may be operated based on the acquired predetermined time. In this method, the predetermined time can be set appropriately by an operator or the like.
In the yarn processing device 70 of the present embodiment, the yarn detection sensor 73F is disposed on the downstream side of the suction airflow with respect to the movable flapper 75C in the suction pipe 73C. In the prepared yarn supplying bobbin 11B, in order to reliably catch the yarn end Y1 in the winder unit 30, it is necessary to secure the length of the yarn end Y1 to be equal to or greater than a predetermined length. In order to secure the length of the yarn end Y1 in the yarn feeding bobbin 11B thus prepared, it is necessary to draw the yarn Y of a predetermined length or more from the yarn feeding bobbin 11A in the suction pipe 73C. Therefore, the yarn detection sensor 73F needs to be disposed at a position capable of detecting the yarn end Y1 from which the yarn Y of a predetermined length or more is drawn out. In such a configuration, the stubs are also created from each other. Therefore, the yarn processing method according to the present embodiment is particularly effective in the yarn processing device 70 having such a configuration.
While the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the scope of the invention.
In the above embodiment, as shown in fig. 5, a configuration in which the upper pressure lever 79A has the holding portion 79Aa is described as an example. However, the structure of the upper pressing rod is not limited thereto. For example, the structure shown in fig. 10 may be provided. As shown in fig. 10, the upper pressure lever 100 has a body portion 102 and a hood portion 104. The main body 102 has a holding portion 102 a. Cover 104 has a recess 104 a.
As shown in fig. 11A, when holding portion 79Aa contacts roller tube upper portion 12b of roller tube 12, upper pressure lever 79A opens the opening of roller tube 12. As shown in fig. 11B, when the holding portion 102a of the body 102 is in contact with the roller pipe upper portion 12B of the roller pipe 12, the upper pressure lever 100 covers a part of the opening portion of the roller pipe 12 with the recess 104a of the cover 104. This reduces the area of the opening of the roller pipe 12, and therefore, the suction airflow acting on the opening can be increased. Therefore, the yarn end Y1 can be reliably sucked into the roller tube inner part 12 c.
In the above embodiment, the yarn processing control of the yarn processing device 70 is performed by the base control unit 23. However, the yarn processing device 70 may have a configuration including a separate control unit, and the yarn processing control may be executed by a device connected by wire or wireless.
In addition to the above-described embodiments, when the yarn Y remains in the roll pipe 12 discharged from the winder unit 30, a yarn removing device may be provided to remove the yarn Y and form a roll pipe 12 without the yarn Y.
Claims (5)
1. A yarn processing method implemented in a yarn processing device, the yarn processing device including:
a first suction unit which is provided above the yarn feeding bobbin and sucks the yarn of the yarn feeding bobbin;
a switching unit that switches opening and closing of air conduction of the yarn feeding bobbin by the first suction unit;
a cutting unit that cuts the yarn sucked by the first suction unit;
a holding section that moves close to and away from the yarn feeding bobbin and presses a part of the yarn sucked by the first suction section against the yarn feeding bobbin by coming into contact with the yarn feeding bobbin;
a second suction unit connected to a lower portion or a lower portion of a winding pipe of the yarn supply bobbin, the second suction unit penetrating the yarn from an upper end of the winding pipe into the winding pipe; and
a control unit for controlling the first suction unit, the switching unit, the cutting unit, the holding unit, and the second suction unit,
the yarn processing method is characterized by comprising the following steps:
switching the switching part to start the suction of the yarn by the yarn feeding bobbin by the first suction part; and
and starting the operation of the holding section and bringing the holding section into contact with the yarn feeding bobbin when it is determined that a predetermined time has elapsed after the first suction section starts suction.
2. The yarn processing method according to claim 1,
the yarn processing device includes: a detection unit for detecting the yarn sucked by the first suction unit,
the method includes the step of switching the operation of the cutting unit based on the detection result of the detection unit after the operation of the holding unit is started.
3. The yarn processing method according to claim 2,
comprises a step in which the control unit sets the predetermined time period based on the detection result of the detection unit,
the holding unit is operated based on the predetermined time set by the control unit.
4. The yarn processing method according to claim 1 or 2,
includes a step of acquiring the predetermined time inputted to the input unit,
and operating the holding unit based on the acquired predetermined time.
5. A yarn processing device is characterized by comprising:
a first suction unit which is provided above the yarn feeding bobbin and sucks the yarn of the yarn feeding bobbin;
a switching unit that switches opening and closing of air conduction of the yarn feeding bobbin by the first suction unit;
a cutting unit that cuts the yarn sucked by the first suction unit;
a holding section that moves close to and away from the yarn feeding bobbin and presses a part of the yarn sucked by the first suction section against the yarn feeding bobbin by coming into contact with the yarn feeding bobbin;
a second suction unit connected to a lower portion or a lower portion of a winding pipe of the yarn supply bobbin, the second suction unit penetrating the yarn from an upper end of the winding pipe into the winding pipe; and
a control unit for controlling the first suction unit, the switching unit, the cutting unit, the holding unit, and the second suction unit,
the control part
Switching the switching part to start the suction of the yarn by the yarn feeding bobbin by the first suction part,
when it is determined that a predetermined time has elapsed after the first suction unit starts suction, the operation of the holding unit is started and the holding unit is brought into contact with the yarn feeding bobbin.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2019109735A JP2020200170A (en) | 2019-06-12 | 2019-06-12 | Yarn processing method and yarn processing device |
| JP2019-109735 | 2019-06-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112079201A true CN112079201A (en) | 2020-12-15 |
| CN112079201B CN112079201B (en) | 2023-07-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010447581.9A Active CN112079201B (en) | 2019-06-12 | 2020-05-25 | Yarn processing method and yarn processing device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2020200170A (en) |
| CN (1) | CN112079201B (en) |
| TR (1) | TR202008262A2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113023483A (en) * | 2021-03-03 | 2021-06-25 | 福建泳力泰针织机械有限公司 | Digital cotton rib knitting machine |
| CN113023484A (en) * | 2021-03-03 | 2021-06-25 | 福建泳力泰针织机械有限公司 | Improved yarn feeding mechanism of circular knitting machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113023483A (en) * | 2021-03-03 | 2021-06-25 | 福建泳力泰针织机械有限公司 | Digital cotton rib knitting machine |
| CN113023484A (en) * | 2021-03-03 | 2021-06-25 | 福建泳力泰针织机械有限公司 | Improved yarn feeding mechanism of circular knitting machine |
| CN113023483B (en) * | 2021-03-03 | 2022-10-04 | 福建泳力泰针织机械有限公司 | Digital cotton rib knitting machine |
Also Published As
| Publication number | Publication date |
|---|---|
| TR202008262A2 (en) | 2021-06-21 |
| JP2020200170A (en) | 2020-12-17 |
| CN112079201B (en) | 2023-07-18 |
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