EP1699959A1 - Device for picking up a section of a weft thread - Google Patents
Device for picking up a section of a weft threadInfo
- Publication number
- EP1699959A1 EP1699959A1 EP04803575A EP04803575A EP1699959A1 EP 1699959 A1 EP1699959 A1 EP 1699959A1 EP 04803575 A EP04803575 A EP 04803575A EP 04803575 A EP04803575 A EP 04803575A EP 1699959 A1 EP1699959 A1 EP 1699959A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- thread
- weft
- finger
- deflection element
- weft thread
- 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.)
- Withdrawn
Links
Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
- D03D47/34—Handling the weft between bulk storage and weft-inserting means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
- B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
- B65H59/20—Co-operating surfaces mounted for relative movement
- B65H59/26—Co-operating surfaces mounted for relative movement and arranged to deflect material from straight path
-
- 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 invention relates to a device for receiving a section of a weft thread, which can be attached between a thread supply for the weft thread and a weft insertion system of a weaving machine.
- a device of the type mentioned at the outset can perform one or more of the following functions. It can serve as a thread brake, which brakes the weft thread towards the end of the entry, so that it is not damaged or torn due to an abrupt hold. It can serve to tension the inserted weft thread, so that when the weft thread hits the edge of the goods, is tied in and cut off in the area of a fabric edge, there is essentially always the same tension. Furthermore, the device can serve to pull a weft thread back into the main blowing nozzle after cutting, in order to protect it from damage.
- a device of the type mentioned is known from DE 10210911 A1.
- This device has the advantage that only the tensile force present in a section of the weft thread exerts a torque on the movably held deflection element or its drive.
- a movable deflection element is held by means of a swivel arm, the swivel axis of which coincides with a stationary deflection element. Problems can arise with this solution if a relatively long thread length is to be withdrawn, for example if a very elastic weft thread is to be tensioned and / or withdrawn.
- the invention has for its object to provide a device of the type mentioned, in which the tensile force exerted on a movably held deflection element depends only on a thread section that is located upstream or downstream of the movable deflection element, the device being a can accommodate large thread lengths.
- a third deflecting element is arranged between two deflecting elements and can be moved on a movement path around a thread deposit by means of an electromotive drive.
- the device according to the invention can accommodate a thread length of almost any size, since the deflecting element can move around the thread tray several times and thereby deposit thread.
- the path of movement of the third deflection element lies at least approximately in one point in a connecting line between the two other deflection elements. This makes it possible to deliver the entire length of weft thread accommodated in the device when a weft thread is inserted into a shed.
- the third deflection element can be moved in the opposite direction to its path in which it has deposited the weft thread on the thread deposit. With a weft insertion, this movement of the deflection element is supported by the thread tension.
- the thread deposit is assigned a device by means of which the entire amount of weft thread deposited on the thread deposit can be released at once.
- FIG. 1 shows a perspective view of a device according to the invention during the insertion of a weft thread
- FIG. 2 shows a vertical section through the device according to FIG. 1,
- FIG. 3 is a perspective view corresponding to FIG. 1 during the retraction of a weft thread
- FIG. 4 shows a vertical section through the device according to FIG. 3,
- FIG. 5 shows a vertical section, similar to FIG. 4, in a further position of a deflection element
- FIG. 6 shows a vertical section corresponding to FIG. 5 at the beginning of a weft insertion
- FIG. 7 shows an embodiment similar to the embodiment according to FIG. 2 with a modified motor
- FIG. 8 shows a schematic illustration of a device according to the invention with modified kinematics
- FIG. 9 shows a perspective view of a further embodiment of a device according to the invention
- FIG. 10 shows a vertical section through the device according to FIG. 9, 11 shows a section through a detail of FIG. 9 during the withdrawal of a weft thread and
- FIG. 12 shows a section through the detail of FIG. 9 in a release position for the weft thread.
- weft threads are normally inserted as shown in principle in FIG. 5 of DE 10210911 A1.
- the weft thread is removed from a supply spool and temporarily stored in a prewinder. Before and after the weft insertion, the weft thread is held by means of a thread clamp of the prewinder.
- the weft thread arrives at one or often two main blowing nozzles of a weft insertion system which are connected in series and which insert the weft thread into a weft thread insertion channel of a reed. This weft thread entry is supported in the area of the reed by means of so-called relay nozzles.
- the pre-winding device is followed by a balloon limiter 10, which is shown in FIG. 1.
- a balloon limiter 10 At the outlet of the balloon limiter 10 there is a pneumatic threading nozzle 11, through which a weft thread 12 can be sucked in and transported further.
- the outlet of the balloon limiter 10 serves as a stationary deflection element 13 for the weft thread 12.
- a tube 17 is inserted into the rotor 15, the end of which facing the deflection element 13 serves as the third deflection element 18.
- the drive motor 16 is inclined relative to the straight running direction of the weft thread 12 such that its axis 19 intersects the straight thread running of the weft thread 12 in the deflection element 14.
- a drum-like thread deposit 20 is arranged coaxially to the axis 19 of the drive motor 16 in the region of the deflection elements 13 and 18.
- the drum-like thread tray 20 consists of a plurality of pins 21, which are arranged on a common holder 22 in a circle. Together they form an approximately cylindrical surface which runs coaxially with the axis 19 of the drive motor 16.
- the pins 21 of the thread deposit 20 penetrate a stripper plate 23 in the direction of the deflection element 14.
- the holder 22 can be adjusted with the pins 21 by means of an adjusting device, for example a pneumatic adjusting device 24, in the longitudinal direction of the axis 19 of the drive motor 16 such that the Pins 21 of the thread tray 20 can be pulled out completely or partially from the stripping plate 23.
- the deflection elements 13, 18 and 14 are aligned with one another, ie the device has assumed the position according to FIGS. 1 and 2.
- the weft thread 12 is braked.
- the drive motor 16 is actuated so that the deflection element 18 moves around the thread deposit 20 (FIGS. 3 and 4).
- the thread tensions F- ⁇ , F 2 , F 3 and F 4 shown in FIG. 3 result in the weft thread. Only the thread tension F 4 , ie the thread tension in the thread section between the deflection elements 13 and 18, causes a torque with respect to the electric drive motor 16. All other thread tensions F 1 , F 2 and F 3 generate no torque with respect to the drive motor 16.
- the braking effect is released immediately before the end of the weft insertion.
- the electric drive motor 16 is turned back until the tube 17 and thus the deflection element 18 are again at least approximately in the position according to FIGS. 1 and 2.
- the inserted weft thread is gripped on the side opposite the entry side by means of a thread catcher. It can happen that a weft thread is caught in its stretched, stretched state, while another weft thread has jumped back due to its elasticity and only then is caught. This weft is then kept loose. These differences can be compensated for by actuating the drive motor 16 and pulling back the weft thread 12, so that all weft threads are brought to the same tension before being incorporated into the fabric.
- the device also controls the thread tension during cutting, i.e. if the weft has already been caught by the intersecting warp threads that form a new shed and has not yet been cut.
- a thread clamp is also provided at the entrance of the main blowing nozzle, which holds the weft thread between the individual weft entries.
- the main blowing nozzles moving with the sley cause elongations and shortenings in the thread run to the stationary deflection elements, which are compensated for when the electric drive motor 16 has been set to a constant torque.
- the device when the weft thread is withdrawn, the device can assume the position shown in Figs. the weft thread 12 can be laid around the thread deposit 20 in one or more more or less complete turns.
- the drive motor 16 can be turned back in order to dissolve the windings which are deposited on the thread deposit 20.
- the holder 22 is withdrawn with the pins 21 (FIG. 6), so that the thread rest 20 sheds the weft thread placed on it and releases it immediately.
- the embodiment according to FIG. 7 differs from the embodiments according to FIGS. 1 to 6 only in that a disk motor 25 with a disk-shaped rotor 26 is provided.
- the disk-shaped rotor 26 receives the tube 17, whose end facing away from the deflection element 13 thus forms the second stationary deflection element 14 '.
- FIG. 8 An embodiment of the invention is shown schematically in FIG. 8, in which a drive motor 16 ′ is arranged directly following the exit of a balloon limiter 10.
- the drive motor 16 'oriented at an angle to the thread path receives a tube 17' which is arranged at an angle to its axis of rotation 19 'and the input of which forms a stationary deflection element 13'.
- the end of the tube 17 'facing away from the balloon limiter 10 forms a deflection element 18' which tion of the motor 16 'moves on a circular path around a drum-like thread deposit 20', the axis of which is aligned coaxially with the axis 19 'of the drive motor 16'.
- Another stationary deflection element 14 " is located in the area of the thread rest 20 '.
- the motor 16' also drives the drum-like thread rest 20 'to rotate about the axis 19' so that the withdrawn weft thread does not extend over the circumference
- the thread holder 20 ' is moved back and forth in the direction of the axis 19' by means of a drive.
- a bracket 30 is attached to the outlet of the balloon limiter 10 which forms a stationary deflection element 13 and which forms a further stationary deflection element 31 in a straight line extension to the deflection element 13.
- a deflection element in the form of a finger 32 which is arranged on the shaft of an electric drive motor 33, projects into the thread course.
- the axis 34 of the drive motor 33 runs at an angle to the connecting line between the deflecting elements 13 and 31 and intersects this connecting line in the deflecting element 31.
- a non-rotating drum 36 serving as a thread rest 35.
- a ring 37 is arranged on the side of the finger facing away from the drum 36, which serves as a safeguard against the weft thread 12 being able to move beyond the end of the finger 32 in the radial direction.
- thread tensions Fi, F 2 , F 3 , and F 4 occur in the weft thread 12 when the latter is on a circular track around the drum 36 moving finger 32 is taken. Only the thread tension F in the section between the drum 36 and the finger 32 causes a torque about the axis 34 of the drive motor 33. All other thread tensions F ⁇ F 2 , F 3 do not generate any torque.
- the device according to FIGS. 9 and 10 can perform the functions of braking, thread tensioning and retracting the weft thread 12 in the same way as has been described with reference to the embodiment according to FIGS. 1 to 6.
- the drive motor 33 rotates the finger 32 in the opposite direction.
- the thread rest 35 designed as a drum 36 can be displaced in the radial direction towards the finger 32 together with the ring 37 in such a way that the peripheral surface of the drum 36 projects at least to the radial end of the finger 32, so that the weft thread 12, as shown in FIG. 12, can be drawn off over the end face of the drum 36.
- a pneumatic adjusting device 38 which adjusts the drum 36 and the ring 37.
- the finger 32 can be adjusted in the radial direction relative to the thread deposit 35 and the ring 37 by means of an adjusting device (together with its drive motor 33). Since the drum 36 and the ring 37 can only be adjusted in one direction, in the illustrated embodiment in the horizontal direction, the finger 32 is brought into a corresponding horizontal position when the quick release is to be carried out.
- the finger 32 can be adjusted in the direction of the axis 34 such that it no longer projects beyond the circumference of the drum 36 serving as the thread rest 35, so that the weft thread can be pulled off.
- an axially adjustable sleeve arranged within the drum 36 is provided, which takes the finger 32 with it when it is axially displaced and pivots out of the radial position in the direction of the axis 34.
- the finger 32 can be loaded with a spring, which loads it in the direction of its radial position shown in FIGS. 9 to 12.
- the ring 37 has an inner diameter which is larger than the outer diameter of the drum 36 serving as the thread rest 35, so that the weft thread usually does not touch the ring.
- the inner radius of the ring 37 is smaller than the radial length of the finger.
- the ring 37 serves only as a limiting element, which prevents the weft thread 12 from moving in the radial direction to such an extent that it jumps over the finger 32.
- a funnel-shaped balloon limiter can also be provided, which tapers in the direction of the stationary deflection element 31.
- an interesting device for threading a weft thread into the stationary deflection element 13, which forms the exit of the balloon limiter 10.
- a compressed air connection 39 opens into an annular chamber 40 which is delimited by means of a ring 41 which forms an annular blowing opening directed towards an inlet funnel. Due to the Coanda effect, the blown-out air flow attaches itself to the inlet funnel and can therefore cause a weft thread to be threaded.
- the bracket 30 is designed as an elastic spring element, so that the deflection element 31 is arranged to be movable. This enables an additional clamping function to be obtained.
- the deflection element 31 is mounted on the sley of a weaving machine, or is designed, for example, as the inlet of a main blowing nozzle of an air-jet weaving machine that moves with the sley.
- an arm is provided instead of a tube 17, which holds the third deflection element 18 or 18 'in the positions shown and whose pivot axis coincides with one of the deflection elements 13 or 14.
- the device according to the invention can be used not only in air jet weaving machines but also in other types of weaving machines, for example in rapier weaving machines which have a weft insertion system working with rapiers.
- a prewinder is normally used, in which an annular thread brake is provided between the thread supply and the outlet of the prewinder. This thread brake cannot pinch weft thread, but it can preferably brake continuously with sufficient braking force.
- the device according to the invention is used in rapier weaving machines, for example, when the weft thread is transferred from a rapier rapier to a slave rapier.
- the device has the function of braking the weft before the transfer and pulling the weft back a little during the transfer and influencing the takeover of the weft by means of the taker gripper by the bringer gripper, ie tensioning the thread at the moment before the taker gripper takes the weft.
- the device according to the invention can take over the same braking function or the tensioning function in a rapier weaving machine towards the end of the weft insertion that it takes over in air jet looms.
- the devices shown in the exemplary embodiments need not be used in such a way that they perform the function of a thread brake, a thread tensioner and a means for retracting the weft thread. They can each be used to perform one or more of these functions, in which case they can be combined with a thread brake or a different thread tensioner that works according to a different principle.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2003161244 DE10361244A1 (en) | 2003-12-22 | 2003-12-22 | Device for picking up a section of a weft thread |
PCT/EP2004/013883 WO2005064059A1 (en) | 2003-12-22 | 2004-12-07 | Device for picking up a section of a weft thread |
Publications (1)
Publication Number | Publication Date |
---|---|
EP1699959A1 true EP1699959A1 (en) | 2006-09-13 |
Family
ID=34683886
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04803575A Withdrawn EP1699959A1 (en) | 2003-12-22 | 2004-12-07 | Device for picking up a section of a weft thread |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1699959A1 (en) |
CN (1) | CN1898427B (en) |
DE (1) | DE10361244A1 (en) |
WO (1) | WO2005064059A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107488936B (en) * | 2017-09-29 | 2022-12-23 | 安平县金路丝网机械有限公司 | Full-automatic hydraulic knitting machine and knitting method |
CN108532070B (en) * | 2018-06-01 | 2023-06-20 | 桐乡市建泰纺织有限公司 | Yarn collecting device capable of being used for core spun yarns of different types |
DE102021205865B3 (en) | 2021-06-10 | 2022-03-17 | Lindauer Dornier Gesellschaft Mit Beschränkter Haftung | METHOD FOR INSERTING AND RETRIEVING A WEFT THREAD ON A LOOPPING MACHINE, LOADING DEVICE FOR A LOOPPING MACHINE AND LOOKING MACHINE |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1218965B (en) * | 1959-06-26 | 1966-06-08 | Sulzer Ag | Process for slacking off weft material in weaving machines and device for carrying out the process |
AT247810B (en) * | 1962-10-17 | 1966-06-27 | Carl Zangs Aktien Ges Maschf | Weaving method and loom for its implementation |
CH556929A (en) * | 1972-10-09 | 1974-12-13 | Sulzer Ag | WEB MACHINE. |
CH685712A5 (en) * | 1992-08-25 | 1995-09-15 | Sulzer Ag | Tensioner for retracted laid weft yarn length |
BE1007898A3 (en) * | 1993-12-22 | 1995-11-14 | Picanol Nv | Device for looms. |
JP3295246B2 (en) * | 1994-09-19 | 2002-06-24 | 津田駒工業株式会社 | Horizontal insertion control method |
DE10051635A1 (en) * | 2000-10-18 | 2002-05-02 | Iro Patent Ag Baar | Yarn feed mechanism, to deliver measured weft lengths to a loom, has a static and small diameter storage body where the stopper is moved wholly by the advancing wound yarn coils as far as the stop setting |
EP1258550B1 (en) * | 2001-05-11 | 2006-07-12 | Kabushiki Kaisha Toyota Jidoshokki | Weft insertion control apparatus in jet loom |
DE10210911A1 (en) * | 2002-03-04 | 2003-09-18 | Picanol Nv | Device for detecting and / or adjusting a tensile force in a thread |
-
2003
- 2003-12-22 DE DE2003161244 patent/DE10361244A1/en not_active Withdrawn
-
2004
- 2004-12-07 EP EP04803575A patent/EP1699959A1/en not_active Withdrawn
- 2004-12-07 WO PCT/EP2004/013883 patent/WO2005064059A1/en active Application Filing
- 2004-12-07 CN CN2004800384311A patent/CN1898427B/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2005064059A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE10361244A1 (en) | 2005-07-21 |
WO2005064059A1 (en) | 2005-07-14 |
CN1898427B (en) | 2010-09-01 |
CN1898427A (en) | 2007-01-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
DE69017641T2 (en) | Weft feeder for rapier and projectile weaving machines. | |
CH646117A5 (en) | METHOD AND DEVICE FOR SPLIT WIDNED YARNS ON AN AUTOMATIC WINDING MACHINE. | |
CH646739A5 (en) | WEAVING PROCESS FOR PROTECTIVE WEAVING MACHINES AND SHOT PREPARATION DEVICE FOR IMPLEMENTING THE WEAVING PROCESS. | |
DE3730480A1 (en) | METHOD FOR REMOVING AN INCORRECTLY INSERTED Weft THREAD ON AN AIR WOVEN MACHINE | |
EP0155432A1 (en) | Loom | |
EP0083748A1 (en) | Method and device of removing a broken weft yarn in a jet loom | |
DE10244694A1 (en) | Weft clamping system, at the multi-color weft mixing tube for an air jet loom, has a flexible tube section which can be compressed and released by an external overpressure/underpressure | |
CH649268A5 (en) | DEVICE FOR FORMING THREAD STORAGE UNITS. | |
DE69207202T2 (en) | THREAD DELIVERY DEVICE FOR GRIPPER AND PROJECT WAVING MACHINES | |
WO2005064059A1 (en) | Device for picking up a section of a weft thread | |
DE69014803T2 (en) | Weft delivery device for air weaving machines. | |
DE68903789T2 (en) | METHOD FOR THREADING THE NOZZLES WITH A CORRECT FASTENING LENGTH LENGTH, AND WEAVING MACHINE THAT WORKS BY THIS METHOD. | |
DE4244081C1 (en) | Open=ended spinner splicing - uses an auxiliary suction flow to draw yarn end through static spinning rotor into the fibre feed channel for precise positioning | |
EP0617153B1 (en) | Process to influence the movement of a weft yarn drawn from a storage bobbin to the weft inserting device of a loom and loom to carry out the process | |
DE4000856A1 (en) | THREAD CUTTING THREAD CUTTER DEVICE OF AN AIR WAVING MACHINE | |
DE19943609C1 (en) | Yarn winding store assembly for the weft yarn feed system to a jet loom, has protective disk at a gap from the take-off side of the store drum with the yarn taken off over the disk edge | |
EP0445489A1 (en) | Weft measuring device for a loom | |
DE102021205865B3 (en) | METHOD FOR INSERTING AND RETRIEVING A WEFT THREAD ON A LOOPPING MACHINE, LOADING DEVICE FOR A LOOPPING MACHINE AND LOOKING MACHINE | |
EP0681044A1 (en) | Process and device to draw-off waste selvedge | |
DE3220064C2 (en) | ||
EP0389410A1 (en) | Weft threading system for a loom | |
EP0458736A1 (en) | Weft breakage repair in dummy shuttle looms | |
DE3345627A1 (en) | DEVICE FOR INSERTING A WIDE THREAD IN THE COMPARTMENT OF A WEAVING MACHINE | |
DE1535397B2 (en) | METHOD AND DEVICE FOR INSERTING AND CLAMPING THE WEFT THREAD IN THE ROLLER GUARD OF A ROLLER WEAVING MACHINE | |
DE60008477T2 (en) | Balloon limiter for a weft feeder in weaving machines |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20060601 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU MC NL PL PT RO SE SI SK TR |
|
DAX | Request for extension of the european patent (deleted) | ||
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: PICANOL |
|
17Q | First examination report despatched |
Effective date: 20130107 |
|
RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: PICANOL |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
INTG | Intention to grant announced |
Effective date: 20141001 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 20150212 |