EP0224464A2 - Method for controlling shot-wise the yarn-feed when weaving pile fabrics on a Jacquard loom - Google Patents
Method for controlling shot-wise the yarn-feed when weaving pile fabrics on a Jacquard loom Download PDFInfo
- Publication number
- EP0224464A2 EP0224464A2 EP86870170A EP86870170A EP0224464A2 EP 0224464 A2 EP0224464 A2 EP 0224464A2 EP 86870170 A EP86870170 A EP 86870170A EP 86870170 A EP86870170 A EP 86870170A EP 0224464 A2 EP0224464 A2 EP 0224464A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- yarn
- weaving
- pile
- processor
- information
- 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- Withdrawn
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Classifications
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D39/00—Pile-fabric looms
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
- D03C3/00—Jacquards
- D03C3/24—Features common to jacquards of different types
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions
- D03D51/18—Automatic stop motions
- D03D51/20—Warp stop motions
Definitions
- This invention relates to a method for controlling shot-wise the yarn-feed when weaving pile fabrics on a Jacquard loom.
- the invention has for object to obviate said drawbacks and to design a device which provides with original and technically-reliable means, a solution which makes it possible to stop the loom whenever any one of the following conditions is sensed:
- the method according to the invention is based on the following steps:
- the invention further pertains to a device for controlling the yarn-feed when weaving pile fabrics of the above-defined kind.
- the invention particularly pertains to an original device which makes it possible to provide a reliable information regarding the yarn-feed, whereby there may be deduced from such an information whether the yarn-feed lies below or above the programmed value. This may mean that the yarn is broken or the yarn-feed is so limited that this must necessarily lead to breaking.
- the device comprises first of all, an apparatus which reads with a photocell the Jacquard patterns and records the information thereof (weaving-in, respectively pile weaving), as well as an apparatus wherewith feeding a yarn length to be woven is measured, which apparatus comprises a running wheel whereover the yarn to be woven is lead, and a disk rotating in synchronism with said running wheel, which acts together with a photocell as a pulse counter, and means to couple the information provided by said pulse counter, by means of a clock for every yarn to be controlled, to an electronic memory.
- the device according to the invention is based on synchroneously reading two data which are to be controlled and read shot-wise.
- the command to form or not pile from a yarn is recorded.
- Said apparatus comprises a light source 2 and a set photo-electric cells (one for each pile yarn) which are mounted in the part 3.
- a Jacquard card 4 is lead through apparatus 1.
- the information (weaving-in, respectively pile weaving) is recorded.
- a drive drum 5 insures the shot wise displacement of the cards present in a magazine 6.
- the Jacquard mechanism is shown with reference 7.
- the length of the yarn being conveyed should also be measured with an apparatus which has been originally designed thereof.
- the apparatus as shown in figure 1 which measures the conveyed yarn length comprises notably the following components: a bobbin 8 the yarn 9 is unwound from, a conventional tension generator 10, two yarn guides 11, a pulley 12 which is fast to a shaft whereon a disk 13 is also secured. Said disk 13 is provided with a series slits 14 which let the light beams originating from a light source, through to a photocell 15. The pulley 12 is thus rotated due to the engagement thereof with yarn 9, over an angle which is a direct function of the conveyed yarn length. The light pulses the disk 13 lets through per time unit are counted by means of said photocell 15.
- Too high or too low a tension is deduced from the recorded pulse number. Said number is compared with reference values which may correspond with a minimum/maximum value or with a nominal value with tolerance.
- the photocell for reading the Jacquard cards is shown with reference numeral 15.
- a photocell is connected for each yarn and the information which causes the command "weaving-in” or "pile weaving” for a yarn is conveyed through a switch 17 controlled by a clock 16, to a memory 18 where the information is stored. From memory 18, the information is coupled through a step switch 19 to a processor 20.
- the pulses counted with disk 13 are coupled to a counter 22 driven by a clock 21.
- One counter is provided for each yarn.
- the information reaches memories 23.
- Said memories 23 contain information regarding the ascertained yarn length, which information reaches processor 20 through a step switch 24.
- Said step switches 19 and 24 have to operate synchroneously in such a way that information from one specific memory 18 and from one specific memory 23 always pertain to one and the same pile yarn.
- Processor 20 further comprises a connection member 25 which insures connection to a comparator 26 or 26 ⁇ . Both comparators 26 and 26 ⁇ compare the input information with the information from the pre-set units 27 and 28, which contain the reference values (weaving-in, respectively pile weaving).
- Said connection member 25 is so driven by the information contained in said memories 18, that with pile-weaving or respectively weaving-in, the data from said memories 23 are fed to comparator 26 ⁇ or respectively 26.
- the processor technology should be such that a comparison can be made stepwise (that is yarn by yarn) with the programmed value (yarn length) and this as a function of the Jacquard data. When under such conditions, a pile-weaving-in yarn lies outside the determined reference values, an alarm signal will be generated in 29.
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Looms (AREA)
Abstract
Description
- This invention relates to a method for controlling shot-wise the yarn-feed when weaving pile fabrics on a Jacquard loom.
- When controlling the accurate feeding of the pile-forming yarns, various mechanical systems are presently used, which are based on measuring the yarn tension. When too high a tension is noticed, a small contact arm is then generally raised, while with a yarn break a small control arm falls down, which may be noticed in both cases due to the alarm signal derived therefrom.
- Due to the dust-full surroundings and the high variations in the generated tensions, the systems being used up to now are effective but in a limited way.
- The invention has for object to obviate said drawbacks and to design a device which provides with original and technically-reliable means, a solution which makes it possible to stop the loom whenever any one of the following conditions is sensed:
- 1. Insufficient yarn feed or no yarn feed;
- 2. Too high a tension, which would lead to the yarn breaking.
- To obtain the above according to the invention, the method according to the invention is based on the following steps:
- 1. Both conveying lengths per shot (weaving-in, respectively pile weaving) from a pile yarn to be woven are determined and said yarn lengths are fed as minimum and maximum values, or nominal values, together with tolerances, by way of reference values to a processor;
- 2. When weaving a shot, the recorded conveyed yarn length is compared to the one said reference values;
- 3. With the comparison as defined in 2, the processor provides an information as a function of a signal which originates in the Jacquard mechanism and wherefrom there appears whether a yarn should or should not form pile;
- 4. An alarm signal is generated should a yarn length be conveyed which falls outside said determined reference values.
- The invention further pertains to a device for controlling the yarn-feed when weaving pile fabrics of the above-defined kind.
- The invention particularly pertains to an original device which makes it possible to provide a reliable information regarding the yarn-feed, whereby there may be deduced from such an information whether the yarn-feed lies below or above the programmed value. This may mean that the yarn is broken or the yarn-feed is so limited that this must necessarily lead to breaking.
- To make this possible according to the invention, the device comprises first of all, an apparatus which reads with a photocell the Jacquard patterns and records the information thereof (weaving-in, respectively pile weaving), as well as an apparatus wherewith feeding a yarn length to be woven is measured, which apparatus comprises a running wheel whereover the yarn to be woven is lead, and a disk rotating in synchronism with said running wheel, which acts together with a photocell as a pulse counter, and means to couple the information provided by said pulse counter, by means of a clock for every yarn to be controlled, to an electronic memory.
- Other details and advantages of the invention will stand out from the following description, given by way of non limitative example and with reference to the accompanying drawings, in which:
- Figure 1 is a diagrammatic showing of that apparatus from the device, which is responsible for measuring the yarn length being conveyed.
- Figure 2 is a diagram of the device according to the invention.
- Figure 3 is a diagrammatic showing of that apparatus from the device according to the invention, which is responsible for recording the Jacquard data (weaving-in, respectively pile weaving).
- The device according to the invention is based on synchroneously reading two data which are to be controlled and read shot-wise.
- First of all, the command to form or not pile from a yarn is recorded. This occurs by means of the apparatus 1 (figure 3). Said apparatus comprises a
light source 2 and a set photo-electric cells (one for each pile yarn) which are mounted in the part 3. For each shot, a Jacquard card 4 is lead throughapparatus 1. Thereby, through the pertaining photo-electric cell, the information (weaving-in, respectively pile weaving) is recorded. In the usual way, adrive drum 5 insures the shot wise displacement of the cards present in amagazine 6. The Jacquard mechanism is shown with reference 7. - Secondly, the length of the yarn being conveyed should also be measured with an apparatus which has been originally designed thereof.
- The apparatus as shown in figure 1 which measures the conveyed yarn length, comprises notably the following components: a
bobbin 8 the yarn 9 is unwound from, aconventional tension generator 10, twoyarn guides 11, apulley 12 which is fast to a shaft whereon adisk 13 is also secured. Saiddisk 13 is provided with aseries slits 14 which let the light beams originating from a light source, through to aphotocell 15. Thepulley 12 is thus rotated due to the engagement thereof with yarn 9, over an angle which is a direct function of the conveyed yarn length. The light pulses thedisk 13 lets through per time unit are counted by means of saidphotocell 15. - When too many pulses are being counted, this means that the tension in yarn 9 is too low.
- Conversely, when too few pulses are being counted per time unit, this means that the tension is becoming too high. Such tension will increase with each shot and lead to the yarn breaking.
- Too high or too low a tension (no tension means break) is deduced from the recorded pulse number. Said number is compared with reference values which may correspond with a minimum/maximum value or with a nominal value with tolerance.
- Together with the recorded information pertaining to the conveyed yarn length, there is also collected from the conventional Jacqard cards, the required information which determines whether a yarn should form or not pile.
- The synchroneous processing of both informations is made clear with reference to figure 2.
- In the diagrammatic showing from figure 2, the photocell for reading the Jacquard cards is shown with
reference numeral 15. A photocell is connected for each yarn and the information which causes the command "weaving-in" or "pile weaving" for a yarn is conveyed through aswitch 17 controlled by aclock 16, to amemory 18 where the information is stored. Frommemory 18, the information is coupled through astep switch 19 to aprocessor 20. - Similarly, the pulses counted with
disk 13 are coupled to a counter 22 driven by aclock 21. One counter is provided for each yarn. From the counters 22, the information reachesmemories 23. Saidmemories 23 contain information regarding the ascertained yarn length, which information reachesprocessor 20 through astep switch 24. Saidstep switches specific memory 18 and from onespecific memory 23 always pertain to one and the same pile yarn.Processor 20 further comprises a connection member 25 which insures connection to acomparator 26 or 26ʹ. Bothcomparators 26 and 26ʹ compare the input information with the information from thepre-set units memories 18, that with pile-weaving or respectively weaving-in, the data from saidmemories 23 are fed to comparator 26ʹ or respectively 26. - The processor technology should be such that a comparison can be made stepwise (that is yarn by yarn) with the programmed value (yarn length) and this as a function of the Jacquard data. When under such conditions, a pile-weaving-in yarn lies outside the determined reference values, an alarm signal will be generated in 29.
- It must be understood that the invention is in no way limited to the above embodiments and that many changes may be brought therein without departing from the scope of the invention as defined by the appended claims.
- For instance, it is clear that the method and the device used thereby may also be applied when instead of in-woven yarns, floating yarns are present.
Claims (9)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE215925 | 1985-11-28 | ||
BE0/215925A BE903733A (en) | 1985-11-28 | 1985-11-28 | Shot by shot yarn monitoring on Jacquard loom - measuring shot length and reading pile or no pile from Jacquard card per shot, then comparing to stop loom if outside set values |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0224464A2 true EP0224464A2 (en) | 1987-06-03 |
EP0224464A3 EP0224464A3 (en) | 1988-07-13 |
Family
ID=3843944
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP86870170A Withdrawn EP0224464A3 (en) | 1985-11-28 | 1986-11-24 | Method for controlling shot-wise the yarn-feed when weaving pile fabrics on a jacquard loom |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP0224464A3 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE1009386A3 (en) * | 1995-05-11 | 1997-03-04 | Michel Van De Wiele N V | COMBINED CONTROL AND DONOR POOL POOL POOL LOOMS FOR CHAIN TREE indulgence. |
WO2020255056A1 (en) * | 2019-06-20 | 2020-12-24 | Vandewiele Nv | Weaving machine with device and method for detecting variations in pile-forming |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2941551A (en) * | 1958-01-09 | 1960-06-21 | Lees & Sons Co James | Semi-oriental jacquard and method |
FR2084577A5 (en) * | 1970-03-13 | 1971-12-17 | Mondellini Ambrogio | Stop-motion for jacquard machine |
DE2653633A1 (en) * | 1975-11-25 | 1977-06-08 | Nissan Motor | METHOD AND DEVICE FOR MONITORING THE WEFT INSERTION PROCESS IN LOOMS |
DE2712698A1 (en) * | 1976-03-29 | 1977-10-13 | Picanol Nv | PROCEDURE AND DEVICE FOR INCLUSION CONTROL IN WEB MACHINERY |
DE2609173B2 (en) * | 1975-03-06 | 1980-10-30 | Nissan Motor Co., Ltd., Yokohama, Kanagawa (Japan) | Method and device for generating a stop signal for stopping a loom in the event of incomplete insertion of a weft thread into a shed |
US4256149A (en) * | 1979-04-09 | 1981-03-17 | M. Lowenstein & Sons, Inc. | Electromechanical filling indicator for pattern-controlled weaving loom |
-
1986
- 1986-11-24 EP EP86870170A patent/EP0224464A3/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2941551A (en) * | 1958-01-09 | 1960-06-21 | Lees & Sons Co James | Semi-oriental jacquard and method |
FR2084577A5 (en) * | 1970-03-13 | 1971-12-17 | Mondellini Ambrogio | Stop-motion for jacquard machine |
DE2609173B2 (en) * | 1975-03-06 | 1980-10-30 | Nissan Motor Co., Ltd., Yokohama, Kanagawa (Japan) | Method and device for generating a stop signal for stopping a loom in the event of incomplete insertion of a weft thread into a shed |
DE2653633A1 (en) * | 1975-11-25 | 1977-06-08 | Nissan Motor | METHOD AND DEVICE FOR MONITORING THE WEFT INSERTION PROCESS IN LOOMS |
DE2712698A1 (en) * | 1976-03-29 | 1977-10-13 | Picanol Nv | PROCEDURE AND DEVICE FOR INCLUSION CONTROL IN WEB MACHINERY |
US4256149A (en) * | 1979-04-09 | 1981-03-17 | M. Lowenstein & Sons, Inc. | Electromechanical filling indicator for pattern-controlled weaving loom |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE1009386A3 (en) * | 1995-05-11 | 1997-03-04 | Michel Van De Wiele N V | COMBINED CONTROL AND DONOR POOL POOL POOL LOOMS FOR CHAIN TREE indulgence. |
US5699837A (en) * | 1995-05-11 | 1997-12-23 | N.V. Michel Van De Wiele | Combined pile feeder control system and pile warp let-off motion for pile weaving machine |
WO2020255056A1 (en) * | 2019-06-20 | 2020-12-24 | Vandewiele Nv | Weaving machine with device and method for detecting variations in pile-forming |
BE1027383B1 (en) * | 2019-06-20 | 2021-01-28 | Vandewiele Nv | DEVICE AND METHOD FOR DETECTING DEVIATIONS IN POLAR FORMATION IN A LIFE |
CN113874571A (en) * | 2019-06-20 | 2021-12-31 | 范德威尔公司 | Loom with device and method for detecting pile change |
US11840777B2 (en) | 2019-06-20 | 2023-12-12 | Vandewiele Nv | Weaving machine with device and method for detecting variations in pile-forming |
CN113874571B (en) * | 2019-06-20 | 2024-03-12 | 范德威尔公司 | Loom with device and method for detecting pile formation change |
Also Published As
Publication number | Publication date |
---|---|
EP0224464A3 (en) | 1988-07-13 |
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