GB2038892A - Winding Wefts - Google Patents
Winding Wefts Download PDFInfo
- Publication number
- GB2038892A GB2038892A GB7941625A GB7941625A GB2038892A GB 2038892 A GB2038892 A GB 2038892A GB 7941625 A GB7941625 A GB 7941625A GB 7941625 A GB7941625 A GB 7941625A GB 2038892 A GB2038892 A GB 2038892A
- Authority
- GB
- United Kingdom
- Prior art keywords
- plate
- output
- winding head
- electromagnet
- scaler
- 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
- 238000004804 winding Methods 0.000 title claims abstract description 28
- 230000037431 insertion Effects 0.000 claims abstract description 10
- 238000003780 insertion Methods 0.000 claims abstract description 10
- 239000003302 ferromagnetic material Substances 0.000 claims description 2
- 238000009941 weaving Methods 0.000 description 7
- 239000002759 woven fabric Substances 0.000 description 5
- 230000005291 magnetic effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000005672 electromagnetic field Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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
- D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
- D03D47/26—Travelling-wave-shed looms
- D03D47/261—Preparation of weft
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
- Filamentary Materials, Packages, And Safety Devices Therefor (AREA)
Abstract
A weft yarn winding head for driving a weft insertion bobbin includes an electromagnetic clutch 1, arranged to drive and brake a take-up plate 9 for driving the bobbin, the angular position of the plate being sensed by a sensor 11 and the clutch being actuated by a trigger circuit 16 and a preselection circuit 13 so as to stop at a preselected position. The number of turns wound on the bobbin and hence the weft length is determined by counting the pulses from sensor 11 and comparing this with a pre-set valve. <IMAGE>
Description
SPECIFICATION
Weft Yarn Winding Head
This invention relates to a weft yarn winding head for a weft insertion device, especially for a multi-shed weaving machine with multiple weft insertion in the warp.
Multi-shed weaving machines with multiple weft insertion in the warp are provided with a weft insertion device having bobbins onto which are wound precisely metered individual weft lengths, and which are unwound from the bobbin as the weft insertion device passes the warp. The bobbin being empty after the passage of the insertion device through the warp, a new weft has to be wound onto the bobbin. Therefore, these multi-shed weaving machines are provided with a weft yarn winding head, the function of which is to wind onto the bobbin of the weft insertion device a weft yarn length corresponding to the woven fabric width, in such a way that it is possible if required to easily change the weft length, in the case when the woven fabric width has to be changed.An important feature of the winding head is that the wound weft yarn length corresponds as precisely as possible to the woven fabric width since otherwise a waste of textile material or faults in the woven fabric would or could occur.
Weft yarn winding heads used at present are usually provided with a take-up plate driven by gears in such a way that the plate carries, during winding, the insertion device bobbin onto which the weft yarn is wound.
A disadvantage of these known winding heads consists in controlling the length of the wound weft yarn of more than one turn only by changing the drive ratio of the gear of the winding head take-up plate, i.e. by changing the gear wheels.
Since there is a relatively large number of winding heads on the weaving machine this gear wheel change is time-consuming and laborious increasing the machine down-time and reassembly time.
A further disadvantage of the known winding heads is the increased storage requirement for the large number, there may be several hundreds, of gear change wheels necessary for one machine for different working widths.
A disadvantage of the known winding heads is also their considerable weight affecting unfavourably their life due to the motion of the same.
An object of the invention is to eliminate or reduce the above disadvantages. A weft yarn winding head according to the invention, comprises a plate arranged on one end of the take-up plate shaft, above said take-up plate shaft a shaft position sensor is placed, the output of which is connected to the scaler input; to the input of the scaler preselection the output of the preselection circuit is connected; the scaler output is connected to the input of the first switch when the trigger circuit output is connected to the input of the second switch and to the scaler resetting input; the switch output is connected to the stationary electromagnet coil and the second switch output to the coil of the magnetic clutch rotary electromagnet.
An advantage of the weft yarn winding head according to the invention is that it is relatively easy to produce and to assemble and it reduces at the same time the range of materials used.
A further advantage is its considerably lower weight compared to known types being in some cases up to 60 per cent.
The winding head according to the invention also contributes considerably to the control of the wound weft yarn length of more than one turn, being performed up to now by changing gear wheels, numerically so that storing of numerous gear wheel sets is unnecessary.
The winding head according to the invention also reduces weaving machine down-time occurring at woven fabric width change, i.e. when changing the metered weft length.
An embodiment of the weft yarn winding head according to the invention is shown diagrammatically in the drawing.
The winding head of the embodiment of the invention includes an electromagnetic clutch 1 containing a stationary electromagnet 2 and a rotary electromagnet 3, the latter being connected to a drive shaft 4 driven by a suitable means (not shown). Each electromagnet 2, 3 is provided with a coil 5. The electromagnetic clutch 1 has a disc 6 made of a ferromagnetic material, e.g. of iron, which is arranged between both electromagnets 2, 3 and which may be engaged with one or the other. The winding head also has a take-up plate shaft 7 which is provided on one end 8 with a take-up plate 9. The disc 6 is arranged on the other and upper end 10 of the shaft 7. A sensor 11 for sensing the position of the shaft 7 is mounted adjacent the shaft and is preferably a contactless one. The output of the position sensor 11 is connected to the input of a scaler 12.A preselection input of scaler 12 is conneted to the output of preselection circuit 13 and the output of scaler 12 is connected to the input of the first switch 14. The output of a trigger circuit 1 6 is connected to the input of a second switch 1 5 as well as to the resetting input of scaler 12. The output of the first switch 14 is connected to coil 5 of the stationary electromagnet 2 and the output of the second switch is connected to coil 5 of the rotary electromagnet 3 of the magnetic clutch 1.
The trigger circuit 1 6 is synchronised with circuits (not shown) of the weaving machine and when pulses are present on its output, a pulse resets scaler 12 and actuates simultaneously switch 1 5 so that a current flows to coil 5 of the rotary electromagnet 3 of the magnetic clutch 1.
By the action of the electromagnetic field of the coil of magnet 3, disc 6 is moved into engagement with the rotary electromagnet 3 so that the disc is rotated by the shaft 4. By this means shaft 7 of the take-up plate as well as the take-up plate begin to rotate. The angular position of shaft 7 is sensed by the position sensor 11 on the output of which pulses are present when shaft 7 rotates. These pulses are counted by scaler 1 2 on the output of which a pulse is present when counting the pulse number preselected by the preselection circuit 1 3. By this pulse, the first switch 14 is actuated connecting coil 5 of the stationary electromagnet 2 to a feed current. The electromagnetic field caused by this current moves disc 6 into engagement with the stationary electromagnet 2 whereby disc 6 as well as shaft 7 of the take-up plate and said plate 9 are stopped.
When a change of the metered length of the wound weft is required, i.e. of the angular adjustment of the take-up plate 9 during winding, the new metered length is preselected by a
means (not shown) in the preselection circuit 13, for example, by means of a change-over switch.
The winding head according to the invention can be used as a metering device also for weft
length metering on single-shed weaving
machines.
Claims (5)
1. A weft yarn winding head including a
rotatable winding head for driving an insertion
device bobbin onto which weft yarn is wound, the take-up plate being arranged to be driven by a
rotatable electromagnet, Whernin the angular
position of the take-up plate is arranged to be
sensed and the plate is arranged to be braked at a preselected angular position.
2. A winding head as claimed in Claim 1 wherein the plate is arranged to be braked by a stationary electromagnet.
3. A winding head as claimed in Claim 2 wherein each electromagnet is provided with a coil, a disc is drivingly connected to the plate the disc being made of a ferromagnetic material and arranged between both electromagnets so as may be engaged by one or other electromagnet, a sensor for sensing said angular position being provided, the output of the sensor being connected to an input of a scaler and the output of a preselection circuit also being connected to the scaler; the output of scaler being connected to the input of a first switch, when the output of a trigger circuit is connected to the input of a second switch and to the reset input of the scaler; and wherein the output of the first switch is connected to the coil of the stationary electromagnet and the output of the second switch to the coil of the rotary electromagnet of the electromagnetic clutch.
4. A winding head as claimed in any one of
Claims 1 to 3 wherein said angular position is sensed by a sensor arranged to act on a shaft connected to the plate.
5. A weft yarn winding head substantially as described with reference to the accompanying drawing.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CS787967A CS199194B1 (en) | 1978-12-04 | 1978-12-04 | Weft thread winding head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB2038892A true GB2038892A (en) | 1980-07-30 |
| GB2038892B GB2038892B (en) | 1982-11-10 |
Family
ID=5429695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7941625A Expired GB2038892B (en) | 1978-12-04 | 1979-12-03 | Winding wefts |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS55101559A (en) |
| CH (1) | CH641739A5 (en) |
| CS (1) | CS199194B1 (en) |
| DE (1) | DE2947221C2 (en) |
| ES (1) | ES487004A1 (en) |
| FR (1) | FR2443522A1 (en) |
| GB (1) | GB2038892B (en) |
| IT (1) | IT1125879B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4538650A (en) * | 1982-12-09 | 1985-09-03 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Method for preparing weft supply to be picked upon starting the operation of a weaving loom, and an apparatus for effecting the same |
| US4651786A (en) * | 1983-10-15 | 1987-03-24 | Sulzer Brothers Limited | Yarn metering device |
| US4850399A (en) * | 1987-06-27 | 1989-07-25 | Lindauer Dorner Gesellschaft M.B.H. | Weaving loom with pneumatic weft thread injection |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2557095Y2 (en) * | 1992-01-13 | 1997-12-08 | 株式会社ゼクセル | Centrifugal governor |
| CN115258822B (en) * | 2022-07-26 | 2023-08-11 | 青岛宏大纺织机械有限责任公司 | Single spindle winding length counting method of winder and automatic winder |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU589303A1 (en) * | 1975-09-23 | 1978-01-25 | Центральный научно-исследовательский институт хлопчато-бумажной промышленности | Device for loading weft inserters with weft thread in wave-type shedding looms |
-
1978
- 1978-12-04 CS CS787967A patent/CS199194B1/en unknown
-
1979
- 1979-11-23 DE DE2947221A patent/DE2947221C2/en not_active Expired
- 1979-12-03 CH CH1072079A patent/CH641739A5/en not_active IP Right Cessation
- 1979-12-03 GB GB7941625A patent/GB2038892B/en not_active Expired
- 1979-12-03 IT IT27803/79A patent/IT1125879B/en active
- 1979-12-04 ES ES487004A patent/ES487004A1/en not_active Expired
- 1979-12-04 FR FR7929768A patent/FR2443522A1/en active Granted
- 1979-12-04 JP JP15642979A patent/JPS55101559A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4538650A (en) * | 1982-12-09 | 1985-09-03 | Kabushiki Kaisha Toyoda Jidoshokki Seisakusho | Method for preparing weft supply to be picked upon starting the operation of a weaving loom, and an apparatus for effecting the same |
| US4651786A (en) * | 1983-10-15 | 1987-03-24 | Sulzer Brothers Limited | Yarn metering device |
| US4850399A (en) * | 1987-06-27 | 1989-07-25 | Lindauer Dorner Gesellschaft M.B.H. | Weaving loom with pneumatic weft thread injection |
Also Published As
| Publication number | Publication date |
|---|---|
| IT1125879B (en) | 1986-05-14 |
| JPS55101559A (en) | 1980-08-02 |
| FR2443522B3 (en) | 1981-10-02 |
| DE2947221A1 (en) | 1980-07-03 |
| GB2038892B (en) | 1982-11-10 |
| CS199194B1 (en) | 1980-07-31 |
| IT7927803A0 (en) | 1979-12-03 |
| CH641739A5 (en) | 1984-03-15 |
| ES487004A1 (en) | 1980-06-16 |
| FR2443522A1 (en) | 1980-07-04 |
| DE2947221C2 (en) | 1985-05-09 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |