WO2022230558A1 - 糸長計測装置及び編糸のバッファ装置 - Google Patents

糸長計測装置及び編糸のバッファ装置 Download PDF

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Publication number
WO2022230558A1
WO2022230558A1 PCT/JP2022/015484 JP2022015484W WO2022230558A1 WO 2022230558 A1 WO2022230558 A1 WO 2022230558A1 JP 2022015484 W JP2022015484 W JP 2022015484W WO 2022230558 A1 WO2022230558 A1 WO 2022230558A1
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WO
WIPO (PCT)
Prior art keywords
yarn
rotating member
knitting
rotation
bobbin
Prior art date
Application number
PCT/JP2022/015484
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
淳 森
Original Assignee
株式会社島精機製作所
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 株式会社島精機製作所 filed Critical 株式会社島精機製作所
Priority to JP2023517191A priority Critical patent/JP7515707B2/ja
Priority to EP22795474.0A priority patent/EP4332036A1/en
Priority to KR1020237040730A priority patent/KR20240004637A/ko
Priority to CN202280031376.1A priority patent/CN117242027A/zh
Publication of WO2022230558A1 publication Critical patent/WO2022230558A1/ja

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H51/00—Forwarding filamentary material
    • B65H51/20—Devices for temporarily storing filamentary material during forwarding, e.g. for buffer storage
    • B65H51/22—Reels or cages, e.g. cylindrical, with storing and forwarding surfaces provided by rollers or bars
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H61/00—Applications of devices for metering predetermined lengths of running material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
    • B65H63/08—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to delivery of a measured length of material, completion of winding of a package, or filling of a receptacle
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/48—Thread-feeding devices
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
    • D04B15/38—Devices for supplying, feeding, or guiding threads to needles
    • D04B15/48—Thread-feeding devices
    • D04B15/482—Thread-feeding devices comprising a rotatable or stationary intermediate storage drum from which the thread is axially and intermittently pulled off; Devices which can be switched between positive feed and intermittent feed
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • D04B35/10—Indicating, warning, or safety devices, e.g. stop motions
    • 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

Definitions

  • the present invention relates to a technology of a yarn length measuring device capable of measuring the yarn length of a knitting yarn drawn out from a buffer device and a knitting yarn buffer device.
  • Patent Document 1 discloses a technique capable of measuring the amount of yarn that is pulled out when the yarn accumulated on the rotating drum is pulled out.
  • the present invention has been made in view of the above circumstances, and an object to be solved by the present invention is to provide a yarn length measuring device and a knitting yarn buffer device capable of realizing highly accurate yarn length measurement. is.
  • the yarn length measuring device includes a rotating member that is rotatably provided with respect to a predetermined mounting member, and a rotating member that is provided at a position off the rotation axis of the rotating member and is released from the upstream side in the yarn feeding direction.
  • an introducing portion for introducing the swept knitting yarn downstream in the yarn feeding direction; a lead-out portion for guiding the knitting yarn introduced from the introducing portion to a yarn feeding path on the downstream side in the yarn feeding direction; and a rotation amount detection unit for detecting the rotation amount.
  • the lead-out portion may be provided on the rotation axis of the rotating member.
  • the introduction portion may be formed at a position where the shortest distance to the rotation axis is shorter than 20 mm.
  • the rotation amount detection unit has a detection target part that rotates integrally with the rotating member, and detects the rotation amount by detecting a change in the surface of the detection target part that accompanies the rotation of the detection target part. You may make it By configuring in this way, more highly accurate yarn length measurement can be realized.
  • a buffer device includes a yarn length measuring device according to the present invention, and a bobbin on which a knitting yarn is wound and stored and arranged upstream of the yarn length measuring device in the yarn feeding direction. It is prepared. By configuring in this way, highly accurate yarn length measurement can be realized.
  • FIG. 1 is a front view showing the overall configuration of a flat knitting machine equipped with a yarn length measuring device and a buffer device according to a first embodiment of the present invention
  • FIG. FIG. 2 is a block diagram showing a configuration related to control of the flat knitting machine
  • FIG. 2 is a front view showing a yarn feeding device including a yarn length measuring device and a buffer device; The front view which showed the yarn length measuring device. The front view which showed the rotating member.
  • (a) A front view showing how the yarn length of knitting yarn is measured by the yarn length measuring device.
  • (b) The perspective view which showed the rotation member which concerns on 3rd embodiment.
  • (a) The front view which showed the rotating member which concerns on 5th embodiment.
  • (b) The front view which showed the rotating member which concerns on 6th embodiment.
  • the flat knitting machine 1 mainly includes a needle bed 10, a carriage 20, a yarn guide rail 30, a servomotor 40, a yarn stand 50, a controller 60 and a yarn feeder 100.
  • the needle beds 10 shown in FIG. 1 are arranged so as to face each other in the front and rear with a needle bed (not shown) interposed therebetween.
  • the front and rear needle beds 10 are arranged, for example, in an inverted V shape in a side view so as to incline upward toward the front and rear central sides (the sides facing each other).
  • Each needle bed 10 is provided with a large number of knitting needles 11 arranged along the longitudinal direction (horizontal direction) of the needle bed 10 .
  • the front and rear needle beds 10 can relatively move left and right when transferring (transferring) the stitches to each other.
  • a pair of front and rear carriages 20 are arranged so as to face the front and rear needle beds 10 from above.
  • the front and rear carriages 20 are connected by a bridge 20a arranged to straddle the plurality of yarn guide rails 30.
  • the carriage 20 can be reciprocated along the longitudinal direction of the needle bed 10 by a servomotor 40 (see FIG. 2).
  • the carriage 20 is provided with a needle selection mechanism (not shown) for selectively operating the knitting needles 11 of the needle bed 10 and a cam mechanism 21 (see FIG. 2).
  • a plurality of thread guide rails 30 shown in FIG. 1 are arranged above the needle bed so as to extend along the longitudinal direction of the needle bed 10 .
  • a yarn carrier 31 that feeds the knitting yarn Y is movably supported on the yarn guide rail 30 .
  • a yarn cone 51 around which the knitting yarn Y is wound is provided on the yarn stand 50 shown in FIG.
  • the knitting yarn Y from the yarn cone 51 is fed to the yarn carrier 31 through the yarn feeding route A.
  • the yarn feeding route A is a route along which the knitting yarn Y from the yarn cone 51 to the yarn carrier 31 is fed.
  • a top spring 52 is provided above the thread cone 51 .
  • the top spring 52 applies tension to the knitting yarn Y pulled out from the yarn cone 51 and fed downstream in the yarn feeding direction (toward the yarn carrier 31).
  • the top spring 52 is positioned on the yarn feeding path A.
  • the control section 60 shown in FIG. 2 is for controlling the operation of the flat knitting machine 1 .
  • the control unit 60 includes an arithmetic processing unit such as a CPU, a storage unit such as a RAM and a ROM, and the like. Various information, programs, etc. used for controlling the flat knitting machine 1 are stored in the storage section of the control section 60 .
  • the control unit 60 is provided at an appropriate location of the flat knitting machine 1 (for example, inside the main body of the flat knitting machine 1 (below the needle bed 10 on the rear side)).
  • the control unit 60 is connected to the servomotor 40 and can control the operation of the servomotor 40 .
  • the control unit 60 can arbitrarily move the carriage 20 by controlling the operation of the servomotor 40 .
  • the controller 60 can also detect the position of the carriage 20 based on the number of rotations of the servomotor 40 .
  • the control unit 60 is also connected to the carriage 20 (more specifically, the cam mechanism 21 ) and can control the operation of the carriage 20 .
  • the control unit 60 controls each unit of the flat knitting machine 1 based on a knitting program created in advance. Specifically, the control unit 60 can reciprocate the carriage 20 along the longitudinal direction of the needle bed 10 by controlling the operation of the servomotor 40 . At this time, the cam mechanism 21 or the like mounted on the carriage 20 advances and retreats the knitting needle 11 with respect to the needle bed, thereby performing knitting operations such as knitting, tucking, miss, etc., and transferring the stitches between the front and rear needle beds 10. It can be performed.
  • the knitted fabric K is knitted by repeating such reciprocating movement of the carriage 20 .
  • the yarn supplying device 100 stores the knitting yarn Y from the yarn cone 51 and supplies the stored knitting yarn Y to the yarn carrier 31 at substantially constant tension.
  • the yarn feeding device 100 is arranged on the side of the flat knitting machine 1 (on the left side in the example shown).
  • the yarn feeding device 100 is positioned on the yarn feeding path A.
  • a plurality of yarn feeding devices 100 (for example, the number corresponding to the number of yarn carriers 31) can be installed as required.
  • the yarn feeding device 100 mainly includes a support section 110 , a buffer device 120 , a resistance applying section 130 , a yarn length measuring device 200 and a control section 300 .
  • the support portion 110 shown in FIG. 3 supports a buffer device 120, a yarn length measuring device 200, etc., which will be described later.
  • the support portion 110 is formed, for example, by combining a plurality of plate-shaped members.
  • the support portion 110 is installed on an appropriate installation target.
  • the support part 110 includes an upper guide part 111 and a lower guide part 112 .
  • the upper guide part 111 is a part into which the knitting yarn Y from the top spring 52 is introduced.
  • the upper guide portion 111 has a hole through which the knitting yarn Y passes vertically.
  • the upper guide portion 111 is supported via an appropriate arm projecting rightward from the right surface of the support portion 110 .
  • the lower guide part 112 is a part through which the knitting yarn Y is led out from the buffer device 120, which will be described later.
  • the lower guide part 112 has a hole through which the knitting yarn Y passes vertically.
  • the lower guide portion 112 is supported below the upper guide portion 111 via an appropriate arm projecting rightward from the right surface of the support portion 110 .
  • the buffer device 120 shown in FIG. 3 draws out the knitting yarn Y from the yarn cone 51 and stores the knitting yarn Y.
  • the knitting yarn Y stored in the buffer device 120 is pulled out (unrolled) downstream in the yarn feeding direction as needed.
  • the buffer device 120 is provided on the support portion 110 so as to be positioned between the upper guide portion 111 and the lower guide portion 112 .
  • the buffer device 120 comprises a housing 121 , a drive section 122 , a winding section 123 and a bobbin 124 .
  • the housing 121 accommodates therein a drive section 122, which will be described later.
  • the housing 121 is fixed to the right surface of the support portion 110 .
  • the drive section 122 shown in FIGS. 2 and 3 drives a winding section 123, which will be described later.
  • the drive unit 122 is provided inside the housing 121 .
  • the drive unit 122 has an appropriate drive source (for example, a motor or the like).
  • the winding section 123 shown in FIG. 3 winds the knitting yarn Y from the upper guide section 111 around the bobbin 124 which will be described later.
  • the winding portion 123 is positioned below the housing 121 and is provided rotatably with respect to the housing 121 .
  • the winding portion 123 rotates around the vertical rotation axis by the driving force of the driving portion 122 .
  • the winding portion 123 rotates clockwise in plan view.
  • the bobbin 124 shown in FIGS. 3 and 4 is capable of storing the knitting yarn Y.
  • the bobbin 124 is formed in a substantially columnar shape with the axial direction directed vertically.
  • the bobbin 124 is provided on the housing 121 so as to be positioned below the winding portion 123 .
  • the bobbin 124 stores the knitting yarn Y by winding the knitting yarn Y around its outer peripheral surface.
  • the knitting yarn Y is wound around the bobbin 124 by the winding unit 123 in a fixed winding manner (so that the yarn length per round is approximately the same).
  • the knitting yarn Y stored in the bobbin 124 is pulled out (unwound) with the knitting operation of the flat knitting machine 1 (carriage 20, yarn carrier 31, etc.) and fed downstream in the yarn feeding direction.
  • the position of the knitting yarn Y unwound from the bobbin 124 changes along the outer peripheral surface of the bobbin 124 so as to rotate clockwise in plan view.
  • the resistance imparting portion 130 shown in FIGS. 3 and 4 imparts frictional resistance to the knitting yarn Y pulled out from the bobbin 124 .
  • the resistance applying section 130 is arranged below the bobbin 124 .
  • the resistance imparting portion 130 is formed in a shape that is open in the vertical direction so that the knitting yarn Y can pass through.
  • the resistance applying portion 130 includes a contact portion 131 , a receiving portion 132 and a biasing portion 133 . 3 and 4, the resistance applying section 130 is illustrated as a cross-sectional view.
  • the contact portion 131 is a portion that contacts the lower end portion of the bobbin 124 .
  • the abutting portion 131 has a substantially truncated conical shape that is turned upside down, and is formed in a cylindrical shape that is open vertically.
  • the contact portion 131 has a surface that contacts the bobbin 124 and has an inclined surface whose diameter increases upward in a cross-sectional view. In this embodiment, the angle of the inclined surface with respect to the horizontal direction is approximately 25 degrees.
  • the contact portion 131 is formed of, for example, a film.
  • the receiving portion 132 is a portion that receives the biasing force of the biasing portion 133, which will be described later.
  • the receiving portion 132 is formed to extend downward from the lower end portion of the contact portion 131 .
  • the receiving portion 132 is formed in a substantially cylindrical shape that opens vertically.
  • the inner diameter of the opening formed in the upper portion of the receiving portion 132 is smaller than the inner diameter of the opening formed in the lower portion.
  • the biasing portion 133 biases the receiving portion 132 upward.
  • a compression coil spring for example, can be used as the biasing portion 133 .
  • the upper end portion of the biasing portion 133 abuts on the upper portion of the receiving portion 132 (portion around the opening).
  • a lower end portion of the biasing portion 133 is supported by the support portion 110 via an appropriate member (rotational support portion 220 described later in this embodiment).
  • the biasing portion 133 biases the contact portion 131 against the lower end portion of the bobbin 124 via the receiving portion 132 .
  • the contact portion 131 of the resistance applying portion 130 as described above is pressed against the lower end portion of the bobbin 124, so that frictional resistance can be applied to the knitting yarn Y between the contact portion 131 and the bobbin 124. .
  • a certain amount of tension can be applied to the knitting yarn Y passing between the contact portion 131 and the bobbin 124 when the knitting yarn Y is drawn downstream in the yarn feeding direction.
  • the knitting yarn Y pulled out from the bobbin 124 can be prevented from coming out too much due to inertia.
  • the resistance imparting portion 130 (the contact portion 131, the receiving portion 132, and the biasing portion 133) as a whole is formed with an opening through which the knitting yarn Y pulled out from the bobbin 124 passes.
  • the knitting yarn Y to which tension is applied by the contact portion 131 passes through the opening and is fed to the lower guide portion 112 side.
  • the yarn length measuring device 200 shown in FIGS. 4 to 6 is capable of measuring the yarn length of the knitting yarn Y pulled out from the bobbin 124.
  • the yarn length measuring device 200 is arranged below the bobbin 124 (on the downstream side in the yarn feeding direction).
  • the yarn length measuring device 200 includes a rotating member 210 , a rotation support section 220 and a rotation amount detection section 230 .
  • the rotary member 210 shown in FIGS. 4 and 5 is provided rotatably with respect to the bobbin 124. As shown in FIG.
  • the rotating member 210 is formed in a substantially cylindrical shape with its axial direction directed vertically. That is, the rotating member 210 has an internal space penetrating vertically.
  • the vertical length of the rotating member 210 is relatively small (for example, smaller than the outer diameter of a disk portion 231 described later) from the viewpoint of suppressing vibration during rotation.
  • the vertical length of the rotating member 210 can be, for example, 50 mm to 100 mm.
  • the rotating member 210 is formed in a shape in which the upper portion is larger in diameter than the lower portion.
  • the radius of the upper portion of the rotary member 210 is formed smaller than the radius of the portion of the bobbin 124 around which the knitting yarn Y is wound.
  • the rotating member 210 is rotatably supported by a rotation support portion 220, which will be described later, about a rotation axis B extending in the vertical direction.
  • the rotation axis B is positioned at the center of the rotating member 210 in plan view (see FIG. 6B).
  • the rotating member 210 is provided below the bobbin 124 .
  • the rotating member 210 is arranged such that the substantially upper half portion thereof is positioned within the opening of the resistance applying portion 130 (the contact portion 131, the receiving portion 132, and the biasing portion 133). Further, the rotating member 210 is arranged such that the rotation axis B substantially coincides with the center of the bobbin 124 in plan view.
  • the rotating member 210 has an introduction portion 211 and an extraction portion 212 .
  • the introduction part 211 introduces the knitting yarn Y from the bobbin 124 to the downstream side in the yarn feeding direction.
  • the introduction part 211 is formed so as to open in the horizontal direction at the upper part of the rotating member 210 .
  • the introduction part 211 is formed so as to communicate between the outer peripheral surface of the upper portion of the rotating member 210 and the internal space of the rotating member 210 .
  • the introduction part 211 is provided at a position off the rotation axis B. More specifically, the introduction portion 211 is positioned radially outward of the rotation axis B. As shown in FIG. In this embodiment, the shortest distance L (distance in the radial direction) from the introduction portion 211 to the rotation axis B is formed to be shorter than 20 mm.
  • the shortest distance L is the distance from the introduction portion 211 , which is located on the outermost side with respect to the rotation axis B (the outer peripheral surface of the upper portion of the rotating member 210 ) to the rotation axis B. As shown in FIG. In this embodiment, the shortest distance L is the radius of the top of the rotating member 210 .
  • the lead-out portion 212 guides the knitting yarn Y introduced from the lead-in portion 211 to the yarn feeding path A on the downstream side in the yarn feeding direction.
  • Lead-out portion 212 is formed to open downward at the lower end portion of rotating member 210 .
  • the lead-out portion 212 communicates with the internal space of the rotating member 210 and is provided on the rotation axis B. As shown in FIG.
  • the rotation support part 220 shown in Figs. 4 and 6(a) supports the rotation member 210 so as to be rotatable around the rotation axis B.
  • the rotation support part 220 has a through hole penetrating vertically, and the lower part of the rotation member 210 is inserted through the through hole.
  • the rotation support part 220 has appropriate bearings (not shown) for smoothly rotating the rotation member 210 .
  • the rotation support part 220 is fixed to the right surface of the support part 110 so as to be positioned below the resistance applying part 130 .
  • a concave portion capable of holding the lower end portion of the biasing portion 133 is formed in the upper surface of the rotation support portion 220 .
  • a rotation amount detection unit 230 shown in FIGS. 4 and 6 is capable of detecting the rotation amount of the rotating member 210 .
  • the rotation amount detection section 230 is housed inside the rotation support section 220 .
  • the rotation amount detection section 230 includes a disk section 231 and a sensor section 232 .
  • the disk part 231 rotates integrally with the rotating member 210 .
  • the disc portion 231 is formed in a substantially disc shape with the thickness direction directed vertically.
  • the disk portion 231 is fixed to the rotating member 210 in a state in which the rotating member 210 is inserted through the opening at the center in plan view.
  • appropriate slits 231a are formed on the surface of the disk portion 231.
  • the slit 231a is shown in part of the surface of the disk portion 231 in FIG.
  • the sensor section 232 can detect changes in the surface of the disk section 231 as the disk section 231 rotates.
  • the sensor unit 232 constitutes an optical encoder. Specifically, the sensor unit 232 detects the passage of light (for example, infrared rays) through the slits 231a of the disc portion 231 and the blocking of light by portions other than the slits 231a, thereby detecting changes in the surface of the disc portion 231. is an optical sensor that can detect By using the detection result of the sensor section 232, the amount of rotation of the disk section 231 (rotating member 210) can be detected.
  • light for example, infrared rays
  • the sensor unit 232 is not limited to detecting changes in the surface of the disc portion 231 by detecting the passage or blocking of light, but by detecting the reflection of light irradiated on the surface of the disc portion 231.
  • a device that detects changes in the surface of the portion 231 can be employed.
  • the sensor unit 232 is not limited to an optical encoder, and may be an encoder of another type such as a magnetic encoder.
  • the sensor section 232 is not limited to an optical sensor, and various sensors capable of detecting changes in the surface of the disk section 231 such as a magnetic sensor can be employed.
  • the sensor section 232 is not limited to an encoder, and may constitute another detection device capable of detecting changes in the surface of the disk section 231 .
  • the sensor section 232 does not necessarily have to detect changes in the surface of the disk section 231 as long as it can detect the amount of rotation of the disk section 231 .
  • the control section 300 shown in FIG. 2 is for controlling the operation of the yarn feeding device 100 .
  • the control unit 300 includes an arithmetic processing unit such as a CPU, a storage unit such as a RAM and a ROM, and the like.
  • the storage section of the control section 300 stores various information, programs, etc. used for controlling the yarn feeding device 100 .
  • the control unit 300 is connected to the driving unit 122 of the buffer device 120 and can control the operation of the driving unit 122 .
  • the control unit 300 is connected to the rotation amount detection unit 230 (sensor unit 232 ), and can acquire the detection result of the sensor unit 232 .
  • the control unit 300 is communicably connected to the control unit 60 and can exchange information with the control unit 60 . In this embodiment, an example in which the control unit 300 and the control unit 60 are separately provided is shown, but instead of such a configuration, the control unit 300 and the control unit 60 may be integrated.
  • the yarn feeding by the yarn feeding device 100 will be described below.
  • the control section 300 stores the knitting yarn Y in the buffer device 120 .
  • the control unit 300 drives the drive unit 122 (winding unit 123) to pull out the knitting yarn Y from the yarn cone 51, wind it around the bobbin 124, and store it.
  • the control unit 300 controls the operation of the winding unit 123 based on the yarn length per round of the knitting yarn Y wound around the bobbin 124, the driving amount of the driving unit 122, and the like. of the knitting yarn Y can be wound around the bobbin 124 .
  • An appropriate value may be input to the control unit 300 as the length of the knitting yarn Y per round. may be calculated.
  • the knitting yarn Y stored in the bobbin 124 is pulled out from the bobbin 124 as the weft knitting machine 1 performs the knitting operation.
  • the yarn length of the knitting yarn Y pulled out from the bobbin 124 is measured by the yarn length measuring device 200 .
  • the yarn length measurement by the yarn length measuring device 200 will be described later.
  • the control unit 300 acquires the measurement result of the yarn length of the knitting yarn Y pulled out from the bobbin 124, and drives the driving unit 122 (winding unit 123) based on the measurement result of the yarn length. Y is pulled out and wound around the bobbin 124 . In this way, a certain amount of knitting yarn Y can be stored on the bobbin 124 by winding the knitting yarn Y of the length that has been pulled out around the bobbin 124 .
  • the yarn length measurement by the yarn length measuring device 200 will be described below with reference to FIG.
  • the rotation member 210 rotates clockwise in plan view in accordance with the operation of the knitting yarn Y. More specifically, when the knitting yarn Y wound around the bobbin 124 is pulled out, the position of the knitting yarn Y unwound from the bobbin 124 rotates clockwise along the outer peripheral surface of the bobbin 124 in plan view. change to Along with such movement of the knitting yarn Y, the introduction portion 211 of the rotating member 210 provided at a position off the rotation axis B is pressed against the knitting yarn Y (see FIG. 6A). As a result, the rotating member 210 rotates around the rotation axis B clockwise in a plan view.
  • the rotation amount detection unit 230 detects changes in the surface of the disc portion 231 that rotates integrally with the rotating member 210 .
  • the control unit 300 acquires the detection result of the rotation amount detection unit 230 and measures the yarn length pulled out from the bobbin 124 based on the detection result.
  • the control unit 300 uses, for example, the amount of rotation of the rotating member 210 (the number of turns of the knitting yarn Y drawn from the bobbin 124) and the length of the knitting yarn Y wound around the bobbin 124 per turn. By performing the calculation, the yarn length pulled out from the bobbin 124 can be measured.
  • the control unit 300 can store the measured yarn length. Further, the control unit 300 can measure the yarn length consumed for each knitting operation (for example, per loop length) based on information regarding the number of rotations of the servomotor 40 and the operation of the carriage 20 obtained from the control unit 60 .
  • the yarn feeding device 100 configured as described above can realize highly accurate yarn length measurement. That is, for example, in a yarn feeding device in which optical sensors are arranged at four locations around the bobbin 124 at equal intervals in the circumferential direction, each optical sensor detects the interruption of light by the knitting yarn Y to be pulled out, thereby detecting the knitting. The amount of yarn Y pulled out can be measured. However, even if the optical sensors are arranged at four locations, the yarn passing between the optical sensors cannot be detected with such a device, so there is room for improvement in the accuracy of yarn length measurement. Also, it is conceivable to increase the number of optical sensors for the purpose of improving the accuracy of yarn length measurement, but in this case, it is conceivable that the cost will increase.
  • the rotation of the rotating member 210 is caused by the operation of the knitting yarn Y led out to the yarn supplying path A on the downstream side in the yarn supplying direction.
  • highly accurate yarn length measurement can be achieved.
  • the above configuration can realize highly accurate yarn length measurement with a simpler configuration than, for example, a configuration in which the number of optical sensors for detecting the knitting yarn Y is increased. As a result, it is possible to improve the accuracy of yarn length measurement while suppressing an increase in cost.
  • the radial dimension of the rotation amount detection unit 230 can be made smaller than when an optical sensor is provided around the bobbin 124, and the size of the device can be reduced. can.
  • the lead-out portion 212 of the rotating member 210 is provided on the rotation axis B. Thereby, the load on the knitting yarn Y passing through the inner space of the rotating member 210 can be reduced.
  • the introduction portion 211 of the rotating member 210 is formed at a position where the shortest distance L to the rotation axis B is relatively short (shorter than 20 mm).
  • the yarn length can be measured with higher accuracy. can be realized.
  • the disk portion 231 according to this embodiment is an embodiment of the detected portion according to the present invention. Further, the rotation support portion 220 according to this embodiment is an embodiment of the predetermined mounting member according to the present invention.
  • the introduction portion 211 of the rotating member 210 is formed at a position where the shortest distance L to the rotation axis B is shorter than 20 mm, but the present invention is not limited to this. do not have. That is, the shortest distance L may be 20 mm or more.
  • the contact portion 131 of the resistance applying portion 130 is formed at an angle of approximately 25 degrees with respect to the horizontal direction of the inclined surface in cross-sectional view has been shown, but the present invention is limited to this. is not.
  • the angle of the inclined surface with respect to the horizontal direction may be formed at a larger angle (for example, about 45 degrees).
  • the angle of the inclined surface with respect to the horizontal direction may be formed to be smaller than 25 degrees.
  • the contact portion 131 of the resistance applying portion 130 is formed in a substantially truncated conical shape upside down
  • the present invention is not limited to this.
  • the contact portion 131 may be formed in a substantially disk shape.
  • the upper surface of the disc is brought into contact with the lower end surface of the bobbin 124 .
  • an opening through which the knitting yarn Y from the bobbin 124 can pass is formed in the center of the disk.
  • a rotating member 210A according to the second embodiment shown in FIG. 7(a) differs from the rotating member 210 according to the first embodiment in the configuration of an introduction portion 211. As shown in FIG. Further, the rotating member 210A is formed to have a larger dimension in the vertical direction than the rotating member 210 according to the first embodiment.
  • the rotary member 210A is formed such that the introduction portion 211 opens obliquely upward.
  • the rotating member 210A has a part of the outer peripheral surface of the upper portion that is notched so as to face obliquely upward, and the introducing portion 211 is formed on the surface facing upward.
  • the lead-out portion 212 of the rotating member 210A is positioned on the rotation axis B of the rotating member 210B, and the lead-in portion 211 is positioned radially outward of the rotation axis B. According to the configuration of the rotating member 210A according to the second embodiment, for example, even when the distance between the bobbin 124 and the rotating member 210A is large, the knitting yarn Y can be easily introduced into the introduction portion 211. .
  • a rotating member 210B according to the third embodiment shown in FIG. 7(b) is formed in a substantially columnar shape with the axial direction directed vertically.
  • the rotating member 210B has an introduction portion 211 formed on its upper surface so as to open upward, and a lead-out portion 212 formed on its lower surface so as to open downward.
  • the lead-out portion 212 is positioned on the rotation axis B of the rotary member 210B, and the introduction portion 211 is positioned radially outward of the rotation axis B.
  • the rotary member 210B is formed with a path that is inclined with respect to the vertical direction so that the introduction portion 211 and the lead-out portion 212 are communicated with each other.
  • a rotating member 210C according to the fourth embodiment shown in FIG. 7(c) is formed of a plate-like member bent into a substantially L shape.
  • the rotary member 210C has an introduction portion 211 formed so as to pass through the plate surface facing the horizontal direction, and a lead-out portion 212 formed so as to pass through the plate surface facing the vertical direction.
  • the lead-out portion 212 is positioned on the rotation axis B of the rotating member 210C, and the introduction portion 211 is positioned radially outward of the rotation axis B.
  • the rotary member 210C can be formed relatively easily by making a hole in the plate-like member.
  • a rotating member 210D according to the fifth embodiment shown in FIG. 8A includes a rotating body 213 provided rotatably about a rotation axis B with respect to the bobbin 124, an arm 214 horizontally extending from the rotating body 213, It has The rotating body 213 is rotatably supported by an appropriate member (for example, the rotation support portion 220).
  • the introduction portion 211 of the rotating member 210 ⁇ /b>D is formed in a cylindrical shape that opens vertically and is provided at the tip of the arm 214 .
  • the lead-out portion 212 of the rotating member 210D is formed in a cylindrical shape that opens vertically, and is provided on the rotation axis B below the rotating body 213 . Although the figure schematically shows the lead-out portion 212, the lead-out portion 212 is integrally formed with the rotating member 210D.
  • the rotating member 210D according to the fifth embodiment can use the rotation amount detection unit 230 (encoder) similar to that of the first embodiment.
  • a rotating member 210E according to the sixth embodiment shown in FIG. 8(b) differs from the rotating member 210D according to the fifth embodiment in the configuration of the introduction portion 211.
  • the rotating member 210E has an introduction portion 211 formed in a hook shape on which the knitting yarn Y can be hooked. According to the above configuration, the knitting yarn Y can be easily introduced into the introduction portion 211 .
  • the buffer device 120 and the yarn length measuring device 200 are formed separately, but the present invention is not limited to this. That is, the buffer device 120 and the yarn length measuring device 200 may be integrally formed. In this case, for example, a configuration in which the yarn length measuring device 200 is provided on the bobbin 124 can be adopted. Further, when the yarn length measuring device 200 is provided on the bobbin 124, for example, the lead-out portion 212 of the rotating member 210D according to the fifth embodiment and the rotating member 210E according to the sixth embodiment shown in FIG. It is possible to adopt a configuration in which it is formed as a separate member. In this case, the lead-out portion 212 may be rotatably or non-rotatably supported by an appropriate member.
  • the lead-out portion 212 of the rotating member 210 is provided on the rotation axis B, but the present invention is not limited to this. That is, the lead-out portion 212 may be provided at a position off the rotation axis B. However, from the viewpoint of reducing the load on the knitting yarn Y, it is desirable to provide the lead-out portion 212 at a position close to the rotation axis B.
  • the flat knitting machine 1 is shown as an example of a knitting machine, but the present invention is not limited to this, and can be applied to various other knitting machines (for example, circular knitting machines, warp knitting machines, etc.). It is also possible to apply That is, the yarn feeding device 100 according to the present embodiment can be arranged on the yarn feeding path A of various knitting machines.
  • the present invention is not limited to this. That is, part or all of the functions of the control section 300 can be executed by a control section (for example, a personal computer or the like) provided separately from the yarn supplying device 100 .
  • the yarn length can be measured by a PC arranged outside the flat knitting machine 1 or by the controller 60 .
  • the present invention can be applied to a yarn length measuring device capable of measuring the yarn length of a knitting yarn let out from a buffer device and a knitting yarn buffer device.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Quality & Reliability (AREA)
  • Knitting Machines (AREA)
PCT/JP2022/015484 2021-04-28 2022-03-29 糸長計測装置及び編糸のバッファ装置 WO2022230558A1 (ja)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2023517191A JP7515707B2 (ja) 2021-04-28 2022-03-29 糸長計測装置及び編糸のバッファ装置
EP22795474.0A EP4332036A1 (en) 2021-04-28 2022-03-29 Yarn length measurement device and knitting yarn buffer device
KR1020237040730A KR20240004637A (ko) 2021-04-28 2022-03-29 실길이 계측장치 및 편사의 버퍼장치
CN202280031376.1A CN117242027A (zh) 2021-04-28 2022-03-29 纱线长度测量装置及编织纱的缓冲装置

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021-075968 2021-04-28
JP2021075968 2021-04-28

Publications (1)

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WO2022230558A1 true WO2022230558A1 (ja) 2022-11-03

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EP (1) EP4332036A1 (ko)
KR (1) KR20240004637A (ko)
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5482465A (en) * 1977-12-08 1979-06-30 Toray Industries Yarn storing and supplying apparatus
JPS59138563A (ja) * 1982-10-16 1984-08-09 シユ−ベルト，ウント，ザルツエル，マシ−ネンフアブリ−ク，アクチエンゲゼルシヤフト 糸貯蔵装置
JP2010047407A (ja) * 2008-08-25 2010-03-04 Murata Machinery Ltd 糸巻取装置及びそれを備える自動ワインダ
JP6250274B2 (ja) 2011-11-11 2017-12-20 ビティエッセエッレ インターナショナル ソチエタ ペル アチオーニ 改良型糸貯蔵供給装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5482465A (en) * 1977-12-08 1979-06-30 Toray Industries Yarn storing and supplying apparatus
JPS59138563A (ja) * 1982-10-16 1984-08-09 シユ−ベルト，ウント，ザルツエル，マシ−ネンフアブリ−ク，アクチエンゲゼルシヤフト 糸貯蔵装置
JP2010047407A (ja) * 2008-08-25 2010-03-04 Murata Machinery Ltd 糸巻取装置及びそれを備える自動ワインダ
JP6250274B2 (ja) 2011-11-11 2017-12-20 ビティエッセエッレ インターナショナル ソチエタ ペル アチオーニ 改良型糸貯蔵供給装置

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EP4332036A1 (en) 2024-03-06
KR20240004637A (ko) 2024-01-11
JPWO2022230558A1 (ko) 2022-11-03
CN117242027A (zh) 2023-12-15

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