EP0847951A2 - Doffing system for a texturing machine - Google Patents
Doffing system for a texturing machine Download PDFInfo
- Publication number
- EP0847951A2 EP0847951A2 EP97120877A EP97120877A EP0847951A2 EP 0847951 A2 EP0847951 A2 EP 0847951A2 EP 97120877 A EP97120877 A EP 97120877A EP 97120877 A EP97120877 A EP 97120877A EP 0847951 A2 EP0847951 A2 EP 0847951A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- packages
- doffing
- yarn
- package
- texturing machine
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
Images
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
- B65H63/00—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package
-
- 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 doffing system for a texturing machine that handles packages depending on the quantity (the length) of yarn, and in particular, to a doffing system for a texturing machine that can handle packages made because a yarn has been cut.
- a travelling doffer that performs a sequential doffing operation using a carriage travelling along a chassis has been used as a doffing apparatus for removing packages and for supplying empty paper tubes. More recently, however, individual auto doffers have been used that can be installed more easily than travelling doffers, are more flexible, and can perform doffing for each winding unit.
- the individual auto doffer comprises a doffing mechanism provided for each winding unit, a drive shaft common to the winding units that supply a driving force to the doffing mechanism, a clutch for each winding unit that connects the doffing mechanism to the drive shafts, and a stocker in which packages are stored.
- each section of the doffing mechanism is correlated with the rotational angle of a cam that is rotated by the drive shafts so that the winding unit connected to the drive shafts via the clutch can continue the doffing operation.
- doffed packages are taken out to the stocker provided behind the chassis.
- the amount of length of yarn wound round a package is controlled by a sizing device.
- a sizing device for controlling the winding time and the accumulation of the number of rotations of paper tubes.
- the doffing timer since the yarn is wound at a constant speed, its length is controlled according to the amount of time for which the yarn has been wound.
- the package is determined to be full and doffed.
- doffed packages include full package and those that have been doffed because a yarn has been cut (packages with yarn breakage).
- packages can be managed more easily by removing such packages before passing them to a subsequent inspection or boxing process. If, however, workers are responsible for sorting small packages, determination and sorting are cumbersome and judgement is likely to be subjective, resulting in conflicting evaluations.
- this invention has a detection means for detecting the size of a package, and sorts packages into large and small packages during doffing based on the detected size.
- one group of packages may be taken out while the other group of packages may be held and suspended from winding rollers.
- a reference value with which packages are sorted into large and small packages may be set and changed.
- Figure 1 is a front view of a texturing machine showing one embodiment of this invention.
- Figure 2 is a timing diagram for a doffing mechanism based on the rotational angle of a cam.
- Figure 3 is a flow chart showing the procedure of processing in a continuous operation mode.
- Figure 4 shows the configuration of the overall texturing machine.
- a draw and false twist texturing machine in Figure 4 including a doffing system according to this invention has a chassis 41 on which a large number of winding units are placed on multiple vertical stages and in a single horizontal array and a yarn supplying creel 42 provided behind the chassis 41 to constitute a yarn supplying system.
- a yarn cutter 43 that cuts yarn at an input port for fed yarn Y and a first feed roller 44 are disposed on the chassis 41.
- a primary heater 45 that heats yarn, an exhaust gas duct 46, and a cooling plate 47 that cools the yarn are installed above the first feed roller 44 as a processing system, and a pre-twister guide 48, a nip twister 49 that twists the yarn, a tension adjuster 50 that adjusts the tension of the yarn, a second feed roller 51, a secondary heater 52, a third feed roller 53, a yarn feeler 54 that detects the presence of the yarn are disposed in front of the chassis 41.
- an oiling roller 55, a winder 56 constituting a winding system, and a individual doffing device 57 are installed on the chassis 41.
- a maintenance passage 58 is provided in front of the chassis 41 and a full package collection passage 59 is provided behind the chassis 41.
- a stocker 60 faces the full package collection passage 59.
- the doffing system using the individual doffing device 57 comprises a doffing mechanism 3 installed for each of a large number of winding units 2 constituting a texturing machine, drive shafts 4, 5, 6 common to each winding unit and disposed along the plurality of winding units 2 in order to supply a driving force to the doffing mechanism 3, electromagnetic clutches 7, 8, 9 that connect the doffing mechanism 3 for the winding unit 2 to the drive shafts 4, 5, 6, a detection means for detecting the size of a package 10, and a sorting means for identifying the package 10 as either a large or a small package.
- the sorting means can set as a reference, at a value ranging from of the size of a full package to the size of an empty paper tube, against which the package 10 is identified as either a large or a small package.
- the winding unit 2 comprises a winding roller 12 that rotates a paper tube or the package 10 using frictional contact, a cradle 11 that holds the paper tube or package 10, and a traverse device 13 that traverses yarn to be wounded.
- the winding unit 2 includes a doffing timer (a sizing device) 18 for measuring the length of wound yarn in order to control the length of yarn wound around the package 10. That is, the timer measures in terms of time the length of the wound yarn that is fed at a constant speed in order to detect a full package, causing the electromagnetic clutch to be activated for doffing.
- a doffing timer a sizing device
- the doffing mechanism 3 opens, closes, and elevates, supplies an empty paper tube to, and threads yarn around a paper tube gripped by the cradle 11. These operations are performed based on the rotational angle of the cam.
- the winding unit 2 includes a push button PB that allows the cam, which has been stopped, to resume rotating.
- the sorting means sorts packages into large and small packages for doffing when a yarn has been cut. Large packages are taken out to the stocker as in full packages, while small packages are held and suspended from the winding roller 12.
- the detection means for detecting the size of a package may be a positional or distance sensor that detects the amount of increase in the height of the cradle 11 caused by an increase in the size of the package, or an outer-diameter sensor that measures the outer diameter of the package.
- the doffing timer 18 is used as the detection means.
- a reference value B is provided to use the doffing timer 18 that measures the amount (the length) of yarn, as the size detection means for sorting packages into large and small packages.
- the continuous operation mode is a normal doffing operation mode in which doffing is carried out each time the doffing timer 18 detects a full package, followed by the refilling of an empty paper tube and the subsequent winding of a new package 10.
- a normal doffing operation is performed to take out the package 10 to the stocker 60.
- the cradle 11 is first elevated and then opened at that position to discharge the package, and an empty paper tube is then gripped by the cradle 11.
- the cradle 11 is then lowered to frictionally contact the paper tube with the winding roller 12, and the threading arm 23 is turned to elevate the yarn to the end of the paper tube.
- the winding roller 12 is rotated and the traverse device 13 is traversed to resume winding.
- the yarn feeler 54 detects the yarn breakage and the yarn cutter 43 disposed at the input port for the supplied yarn Y cuts the yarn to prevent the end of the yarn from being entwined with the feed roller 44, while lighting an yarn-breakage indication lamp (not shown in the drawings).
- the count value X of the doffing timer 18 is compared to the reference value B to identify the yarn-breakage package 10 as either a large package that has exceeded the reference value B or a small package that has not reached said value B.
- the cradle 11 is elevated and opened while the cam of the doffing mechanism 3 is stopped, so the package 10 is rolled into the stocker 60. Determining from the yarn-breakage indication lamp that the yarn has been cut, the operator removes waste yarn entwined in a yarn path including a processing system and passes the yarn through the path, allows an air sucker constituting the doffing apparatus to catch and hold the waste yarn, and then presses the push button PB.
- the cradle 11 which has been stopped at the position at which it discharged the package 10, is reactivated, and the refilling of an empty paper tube in the cradle 11 and the threading of yarn around the paper tube are automatically executed to resume winding.
- the doffing timer 18 is reset in response to the resumption of winding.
- a small package doffing operation is performed by elevating the cradle 11 and stopping the cam while the cradle 11 is closed. This small package is held within the cradle 11 while it is suspended from the winding roller 12. This state indicates that the operator should remove the package.
- the operator On viewing the yarn-breakage indication lamp, the operator approaches the apparatus to deal with the yarn breakage, reaches for the package from the maintenance passage 58 side, and presses the push button PB while the operator holds the package in his or her hands from below.
- the push button PB When the push button PB is pressed, the cam is rotated slightly to open the cradle 11. The operator then removes the package while holding it in his or her hands. After a yarn passing operation and when the operator presses the push button PB again as described above, the doffing system threads the yarn into the paper tube.
- the count value always exceeds the reference value B so all yarn-breakage packages are taken out to the stocker.
- the counter value never exceeds the reference value B so only full packages are taken out to the stocker with all yarn-breakage packages held.
- This invention has the following effects.
Landscapes
- Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Spinning Or Twisting Of Yarns (AREA)
- Replacing, Conveying, And Pick-Finding For Filamentary Materials (AREA)
- Filamentary Materials, Packages, And Safety Devices Therefor (AREA)
- Preliminary Treatment Of Fibers (AREA)
Abstract
Description
Claims (6)
- A doffing system for a texturing machine characterized in that the system has a detection means for detecting the size of a package, and sorts packages during doffing based on the detected size.
- A doffing system for a texturing machine according to claim 1 characterized in that packages are handled differently depending on the results of sorting.
- A doffing system for a texturing machine according to claim 1 or 2 characterized in that packages are sorted into two types, large and small packages.
- A doffing system for a texturing machine according to claim 3 characterized in that after sorting, one group of packages are taken out while the other group of packages are held and suspended from winding rollers.
- A doffing system for a texturing machine according to claim 3 characterized in that a reference value with which packages are sorted into large and small packages can be set and changed.
- A doffing system for a texturing machine according to any one of claims 1 to 5 characterized in that a yarn is continuously wound until a package becomes full and at this point of time, a doffing operation is initiated, in that the doffing operation is also performed when the yarn is cut before the package becomes full, and in that packages are sorted depending on their size when at least, the doffing operation is performed because a yarn has been cut.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP333791/96 | 1996-12-13 | ||
JP33379196 | 1996-12-13 | ||
JP8333791A JP3047838B2 (en) | 1996-12-13 | 1996-12-13 | Doffing system for false twisting machine |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0847951A2 true EP0847951A2 (en) | 1998-06-17 |
EP0847951A3 EP0847951A3 (en) | 1999-03-10 |
EP0847951B1 EP0847951B1 (en) | 2002-05-02 |
Family
ID=18270003
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97120877A Expired - Lifetime EP0847951B1 (en) | 1996-12-13 | 1997-11-27 | Doffing method for a texturing machine |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0847951B1 (en) |
JP (1) | JP3047838B2 (en) |
KR (1) | KR100328466B1 (en) |
CN (1) | CN1205103C (en) |
DE (1) | DE69712297T2 (en) |
TW (1) | TW369572B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0875481A2 (en) * | 1997-05-02 | 1998-11-04 | Murata Kikai Kabushiki Kaisha | Automatic system for texturing process |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102899748B (en) * | 2012-10-16 | 2015-12-09 | 新昌县盛大科技有限公司 | Yarn manufacturing equipment runs single ingot control method |
CN102912500A (en) * | 2012-11-16 | 2013-02-06 | 吴江精美峰实业有限公司 | Draw texturing machine |
TWI618670B (en) * | 2014-05-16 | 2018-03-21 | Maschinfabrik Rieter Ag | Drawer holder and ring spinning machine and for supporting the transfer of the bobbin tube Device and method for predetermined working position on a spindle of a ring spinning machine |
JP7489188B2 (en) * | 2019-12-09 | 2024-05-23 | Tmtマシナリー株式会社 | Yarn handling equipment |
CN115626525B (en) * | 2022-09-29 | 2023-10-03 | 浙江康立自控科技有限公司 | Full-drum control system and method for winding device of silk winder |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3741490A (en) * | 1971-11-16 | 1973-06-26 | Logan J | Yarn package doffing apparatus and method |
US3820730A (en) * | 1968-12-24 | 1974-06-28 | T Endo | Automatic doffing apparatus for textile machine having one or more winding units |
EP0291712A1 (en) * | 1987-05-16 | 1988-11-23 | W. SCHLAFHORST AG & CO. | Method for sorting bobbins on an automatic winding machine |
JPH0218264A (en) * | 1988-07-05 | 1990-01-22 | Murata Mach Ltd | Automatic winder |
EP0415702A2 (en) * | 1989-08-30 | 1991-03-06 | Du Pont Canada Inc. | Method of predicting yarn package size |
-
1996
- 1996-12-13 JP JP8333791A patent/JP3047838B2/en not_active Expired - Fee Related
-
1997
- 1997-08-20 TW TW086111938A patent/TW369572B/en active
- 1997-09-18 CN CNB971186499A patent/CN1205103C/en not_active Expired - Fee Related
- 1997-10-20 KR KR1019970053823A patent/KR100328466B1/en not_active IP Right Cessation
- 1997-11-27 EP EP97120877A patent/EP0847951B1/en not_active Expired - Lifetime
- 1997-11-27 DE DE69712297T patent/DE69712297T2/en not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3820730A (en) * | 1968-12-24 | 1974-06-28 | T Endo | Automatic doffing apparatus for textile machine having one or more winding units |
US3741490A (en) * | 1971-11-16 | 1973-06-26 | Logan J | Yarn package doffing apparatus and method |
EP0291712A1 (en) * | 1987-05-16 | 1988-11-23 | W. SCHLAFHORST AG & CO. | Method for sorting bobbins on an automatic winding machine |
JPH0218264A (en) * | 1988-07-05 | 1990-01-22 | Murata Mach Ltd | Automatic winder |
EP0415702A2 (en) * | 1989-08-30 | 1991-03-06 | Du Pont Canada Inc. | Method of predicting yarn package size |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 014, no. 157 (M-0955), 27 March 1990 & JP 02 018264 A (MURATA MACH LTD), 22 January 1990 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0875481A2 (en) * | 1997-05-02 | 1998-11-04 | Murata Kikai Kabushiki Kaisha | Automatic system for texturing process |
EP0875481A3 (en) * | 1997-05-02 | 1999-08-25 | Murata Kikai Kabushiki Kaisha | Automatic system for texturing process |
Also Published As
Publication number | Publication date |
---|---|
CN1184764A (en) | 1998-06-17 |
DE69712297T2 (en) | 2002-12-19 |
EP0847951B1 (en) | 2002-05-02 |
JPH10168683A (en) | 1998-06-23 |
EP0847951A3 (en) | 1999-03-10 |
KR19980063526A (en) | 1998-10-07 |
TW369572B (en) | 1999-09-11 |
JP3047838B2 (en) | 2000-06-05 |
KR100328466B1 (en) | 2002-10-25 |
DE69712297D1 (en) | 2002-06-06 |
CN1205103C (en) | 2005-06-08 |
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