EP0418780A1 - Device for guarding the yarn motion - Google Patents
Device for guarding the yarn motion Download PDFInfo
- Publication number
- EP0418780A1 EP0418780A1 EP90117857A EP90117857A EP0418780A1 EP 0418780 A1 EP0418780 A1 EP 0418780A1 EP 90117857 A EP90117857 A EP 90117857A EP 90117857 A EP90117857 A EP 90117857A EP 0418780 A1 EP0418780 A1 EP 0418780A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- yarn
- guiding eye
- transistor
- phototransistor
- sensor
- 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- Withdrawn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
- 230000033001 locomotion Effects 0.000 title claims abstract description 15
- 239000004753 textile Substances 0.000 claims abstract description 5
- 239000011521 glass Substances 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 238000009940 knitting Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
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
- B65H63/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material
- B65H63/024—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials
- B65H63/028—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element
- B65H63/032—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element electrical or pneumatic
- B65H63/0321—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element electrical or pneumatic using electronic actuators
- B65H63/0324—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element electrical or pneumatic using electronic actuators using photo-electric sensing means, i.e. the defect signal is a variation of light energy
-
- 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
- B65H63/02—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material
- B65H63/024—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials
- B65H63/028—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element
- B65H63/032—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element electrical or pneumatic
- B65H63/0321—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element electrical or pneumatic using electronic actuators
- B65H63/0327—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to reduction in material tension, failure of supply, or breakage, of material responsive to breakage of materials characterised by the detecting or sensing element electrical or pneumatic using electronic actuators using piezoelectric sensing 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
- B65H2513/00—Dynamic entities; Timing aspects
- B65H2513/10—Speed
- B65H2513/11—Speed angular
-
- 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 guarding the yarn motion in a textile machine during unwinding from a bobbin through a guiding eye around the internal diameter of which the yarn rotates.
- stop motions which detect the condition of yarns in textile machines.
- the Author's Certificate No. 249,827 describes a stop motion system containing a fix piecoelectric member connected to the control micro-computer of the machine. Said piecoelectric member responds to the yarn motion and the signal is transmitted and processed in the micro-computer with regard to the program of the yarn feed or withdrawal of the yarn by the machine.
- the micro-computer gives then a command for eventual stopping of the machine.
- Said guarding device operates reasonably reliably, but the circuits processing the signal from the piecoelectric member must be able to evaluate also the interferences.
- the object of the invention is to eliminate the above-mentioned disadvantage, what is principally achieved so that the sensor of the device is provided with a guiding eye for detecting a rotary yarn motion.
- the important advantage of the invention is that during withdrawing of the yarn by the knitting feed, the yarn always rotates in the eye, said rotation is safely detected by the sensor and therefore the effect of the machine vibration can be entirely eliminated.
- a single-cylinder, small-diameter, circular knitting machine for the production of socks goods is provided with a stand 1 of bobbins 2.
- Each bobbin 2 is arranged on a horizontal carrier 21 and above the bobbin 2 in the axis of the bobbin there is a guiding eye 3 fixed in a holder 4.
- Above the guiding eye 3 there is another guiding eye 5 fixed in a holder 6 positioned also in the axis of the bobbin 2.
- Photoelectric sensor 7 is disposed on the guiding eye 3 above the bobbin 2 from outside. Said sensor 7 contains a light emitting diode 71 and by 180° opposite to it there is a stationarily arranged phototransistor 72. Guiding eye 3 does not obstruct the passage of the light from the emitting diode 21.
- the connection of said diode 71 and phototransistor 72 is shown in Fig. 4.
- the phototransistor 72 is in Darlington's connection with a transistor 8 for current amplification connected to terminals 9 and 10 of the source.
- the working point of the Darlington's connection is adjusted by a resistor 11.
- a condenser 12 is connected to the inputs of the phototransistor 72 and the transistor 8 to separate direct current component of the signal and further a transistor 13 by its base.
- the working point of the transistor 13 is adjusted by resistors 14, 15 being connected to its base.
- a resistor 16 connected in the collector of transistor 13 is a working loading resistor.
- a condenser 17 connected to the output of transistor 13 creates together with the resistor 16 a timing circuit.
- the output of the transistor 13 is connected with the base of a transistor 19 through a resistor 18.
- a resistor 21 and a light emitting diode 22 creating a working load of the transistor 19.
- the output of the transistor 19 is connected through a diode 20 to an output 23.
- a switch 24 is parallelly connected between the resistor 18 and the transistor 19. Said output 23 is connected to further electronic circuits of the machine.
- a complete stop motion device is controlled by the switch 24 which when closed connects the base of the transistor 19 with the potential of the terminal 9.
- the output on the terminal 23 has thus no influence on the micro-computer of the machine.
- the internal wall of the eye 3 is a glass ring 34 (Fig. 2) and the outer wall is a metal ring 25.
- the ring 25 there are two coaxial openings 251 and 252 bored perpendicularly to the surface of the ring 25.
- the light emitting diode 71 and the phototransistor 72 are assigned from outside. This arrangement ensures that the light beam is not diffused and that it is narrow directional. The phototransistor 72 cannot be influenced by other source of light.
- the senor of the device can be created as mechanical.
- Into internal space of guiding eye 3 (Fig. 3) reaches an arm 261 of a lever 26, the other arm 262 of which reaches into the space between a not shown phototransistor and a light emitting diode.
- lever 26 a piezoelectric member can be installed, the signal from said piezoelectric member is processed by the circuits of the micro-computer.
- the device can be used to guard the yarn motion during unwinding from the bobbin in any textile machine.
Landscapes
- Engineering & Computer Science (AREA)
- Quality & Reliability (AREA)
- Knitting Machines (AREA)
- Spinning Or Twisting Of Yarns (AREA)
- Guides For Winding Or Rewinding, Or Guides For Filamentary Materials (AREA)
Abstract
The invention relates to a device for guarding the yarn motion in a textile machine during unwinding the yarn (P) from the bobbin (1). A sensor (7) of the device is assigned to a yarn guiding eye (3) for detecting the rotary motion of the yarn which unwinds from the bobbin in a balloon. Light emitting diode (71) and a phototransistor (72) can be used as a sensor.
Description
- The invention relates to a device for guarding the yarn motion in a textile machine during unwinding from a bobbin through a guiding eye around the internal diameter of which the yarn rotates.
- Various types of stop motions are known, which detect the condition of yarns in textile machines. To guard the yarn motion in high-speed, small diameter knitting machines for the production of stockings or socks goods yarn stop motions are used. The Author's Certificate No. 249,827 describes a stop motion system containing a fix piecoelectric member connected to the control micro-computer of the machine. Said piecoelectric member responds to the yarn motion and the signal is transmitted and processed in the micro-computer with regard to the program of the yarn feed or withdrawal of the yarn by the machine. The micro-computer gives then a command for eventual stopping of the machine. Said guarding device operates reasonably reliably, but the circuits processing the signal from the piecoelectric member must be able to evaluate also the interferences.
- The object of the invention is to eliminate the above-mentioned disadvantage, what is principally achieved so that the sensor of the device is provided with a guiding eye for detecting a rotary yarn motion.
- The important advantage of the invention is that during withdrawing of the yarn by the knitting feed, the yarn always rotates in the eye, said rotation is safely detected by the sensor and therefore the effect of the machine vibration can be entirely eliminated.
- Further advantages and particularities of the invention are realized in the embodiments illustrated in the drawings.
- Fig. 1 schematically shows the guiding of the yarn from the bobbin through the eye with the use of a photoelectric sensor;
- Fig. 2 schematically shows a guiding eye for photoelectric sensor;
- Fig. 3 schematically illustrates another embodiment of the sensor, and
- Fig. 4 the electric connection of the stop motion with the photoelectric sensor.
- A single-cylinder, small-diameter, circular knitting machine for the production of socks goods is provided with a
stand 1 ofbobbins 2. Eachbobbin 2 is arranged on ahorizontal carrier 21 and above thebobbin 2 in the axis of the bobbin there is a guidingeye 3 fixed in a holder 4. Above the guidingeye 3 there is another guiding eye 5 fixed in a holder 6 positioned also in the axis of thebobbin 2. Photoelectric sensor 7 is disposed on the guidingeye 3 above thebobbin 2 from outside. Said sensor 7 contains alight emitting diode 71 and by 180° opposite to it there is a stationarily arrangedphototransistor 72. Guidingeye 3 does not obstruct the passage of the light from theemitting diode 21. - The connection of said
diode 71 andphototransistor 72 is shown in Fig. 4. Thephototransistor 72 is in Darlington's connection with a transistor 8 for current amplification connected toterminals 9 and 10 of the source. The working point of the Darlington's connection is adjusted by a resistor 11. Acondenser 12 is connected to the inputs of thephototransistor 72 and the transistor 8 to separate direct current component of the signal and further atransistor 13 by its base. The working point of thetransistor 13 is adjusted byresistors resistor 16 connected in the collector oftransistor 13 is a working loading resistor. A condenser 17 connected to the output oftransistor 13 creates together with the resistor 16 a timing circuit. The output of thetransistor 13 is connected with the base of atransistor 19 through aresistor 18. In the collector of thetransistor 19 is connected aresistor 21 and alight emitting diode 22 creating a working load of thetransistor 19. The output of thetransistor 19 is connected through adiode 20 to anoutput 23. Aswitch 24 is parallelly connected between theresistor 18 and thetransistor 19. Saidoutput 23 is connected to further electronic circuits of the machine. - The operation of the above described device is as follows. During unwinding of yarn P from
bobbin 2, yarn P rotates around thebobbin 2 axis and due to centrifugal force it creates a balloon. Consequently, yarn P continuously follows the internal circumference of guidingeye 3 and presses onto its wall. The rotating yarn P interrupts the light beam emitted bydiode 71, so thatphototransistor 72 closes and opens in dependence on the semi-axis of the yarn P. Alternating signal of the voltage on the collector of the transistor 8 is supplied through thecondenser 12 on the base oftransistor 13 which opens and discharges the condenser 17. Within the duration of the time constant influenced mainly by the magnitude of theresistor 16 and the rate of capacity of the condenser 17 thetransistor 19 closes, the light-emitting diode 22 extinguishes and theoutput terminal 23 is disconnected from the potential of negative voltage terminal 9. This ensures voltage level corresponding to logic "1". Voltage condition on thisterminal 23 is further evaluated in the circuits of the control micro-computer of the machine, which in this case leaves the machine in operation. - If yarn P is not withdrawn due to breakage, there is no alternate signal, the circuit is in basic condition, i.e. voltage level on
terminal 23 corresponds to logic "0" and the control micro-computer stops the machine drive. - A complete stop motion device is controlled by the
switch 24 which when closed connects the base of thetransistor 19 with the potential of the terminal 9. The output on theterminal 23 has thus no influence on the micro-computer of the machine. - To improve yarn detection, it is possible to make the yarn guiding eye from several parts, what is within the scope of the invention. The internal wall of the
eye 3 is a glass ring 34 (Fig. 2) and the outer wall is ametal ring 25. In thering 25 there are twocoaxial openings 251 and 252 bored perpendicularly to the surface of thering 25. Thelight emitting diode 71 and thephototransistor 72 are assigned from outside. This arrangement ensures that the light beam is not diffused and that it is narrow directional. Thephototransistor 72 cannot be influenced by other source of light. - Further within the scope of the invention the sensor of the device can be created as mechanical. Into internal space of guiding eye 3 (Fig. 3) reaches an
arm 261 of alever 26, theother arm 262 of which reaches into the space between a not shown phototransistor and a light emitting diode. Or instead of lever 26 a piezoelectric member can be installed, the signal from said piezoelectric member is processed by the circuits of the micro-computer. - The device can be used to guard the yarn motion during unwinding from the bobbin in any textile machine.
Claims (5)
1. Device for guarding the yarn motion in a textile machine during unwinding from a bobbin,
characterized by
a guiding eye (3) in which the yarn (P) rotates around its internal diameter and by a sensor (7) disposed on the guiding eye (3) for detecting the rotary motion of yarn (P).
characterized by
a guiding eye (3) in which the yarn (P) rotates around its internal diameter and by a sensor (7) disposed on the guiding eye (3) for detecting the rotary motion of yarn (P).
2. Device according to claim 1, characterized in that a light emitting diode (71) and opposite to it by 180° a phototransistor (72) are assigned to the circumference of the guiding eye (3) from outside.
3. Device according to claim 2, characterized in that the phototransistor (72) is connected in Darlington's connection with a transistor (8) to a source of voltage, a condenser (12) is connected to it and a transistor (13) by its base, on the input of which is parallelly connected another condenser (17) and the base of another transistor (19), the input of which is connected to the control micro-computer of the machine via a diode (20).
4. Device according to claim 1, characterized in that into the internal space of the guiding eye (3) reaches a mechanical sensor, for example an arm (261) of a lever (26), the other arm (262) of which reaches between a light-emitting diode and a phototransistor.
5. Device according to claims 1 and 2, characterized in that the guiding eye (3) is composed of internal glass ring (34) and outer metal ring (25) in which there are coaxial openings (251, 252) created perpendicularly to its surface.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CS5348/89 | 1989-09-19 | ||
CS895348A CS276353B6 (en) | 1989-09-19 | 1989-09-19 | Device for watching thread motion |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0418780A1 true EP0418780A1 (en) | 1991-03-27 |
Family
ID=5398213
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90117857A Withdrawn EP0418780A1 (en) | 1989-09-19 | 1990-09-17 | Device for guarding the yarn motion |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0418780A1 (en) |
JP (1) | JPH03174033A (en) |
CS (1) | CS276353B6 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2358644A (en) * | 2000-01-28 | 2001-08-01 | Truetzschler Gmbh & Co Kg | Apparatus for monitoring a textile fibre sliver |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110552094B (en) * | 2019-08-02 | 2021-08-27 | 宜昌经纬纺机有限公司 | Device and method for detecting distance from air ring to ingot tank |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1283528A (en) * | 1968-12-18 | 1972-07-26 | Crabtree Engineering Group Col | An improved method and apparatus for detecting yarns |
US3840869A (en) * | 1972-06-20 | 1974-10-08 | Burlington Industries Inc | Yarn balloon detector for cone over cone lazy twist |
FR2267399A1 (en) * | 1974-04-13 | 1975-11-07 | Palitex Project Co Gmbh | |
FR2316172A1 (en) * | 1975-07-03 | 1977-01-28 | Rieter Ag Maschf | OPTICAL WIRE BREAKER |
US4160360A (en) * | 1978-07-27 | 1979-07-10 | Owens-Corning Fiberglas Corporation | Optical strand sensor for detecting a filament being wound and twisted on a spool |
WO1980000576A1 (en) * | 1978-09-07 | 1980-04-03 | Owens Corning Fiberglass Corp | Electro-optical control to detect filament passing through a guide-eye |
US4275297A (en) * | 1979-08-02 | 1981-06-23 | Owens-Corning Fiberglas Corporation | Electro-optical strand detector |
GB2103357A (en) * | 1981-07-16 | 1983-02-16 | Textima Veb K | An apparatus for monitoring a thread in a textile machine |
WO1987004418A1 (en) * | 1986-01-27 | 1987-07-30 | Iro, Aktiebolaget | Yarn storing device |
-
1989
- 1989-09-19 CS CS895348A patent/CS276353B6/en unknown
-
1990
- 1990-09-17 EP EP90117857A patent/EP0418780A1/en not_active Withdrawn
- 1990-09-18 JP JP2246378A patent/JPH03174033A/en active Pending
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1283528A (en) * | 1968-12-18 | 1972-07-26 | Crabtree Engineering Group Col | An improved method and apparatus for detecting yarns |
US3840869A (en) * | 1972-06-20 | 1974-10-08 | Burlington Industries Inc | Yarn balloon detector for cone over cone lazy twist |
FR2267399A1 (en) * | 1974-04-13 | 1975-11-07 | Palitex Project Co Gmbh | |
FR2316172A1 (en) * | 1975-07-03 | 1977-01-28 | Rieter Ag Maschf | OPTICAL WIRE BREAKER |
US4160360A (en) * | 1978-07-27 | 1979-07-10 | Owens-Corning Fiberglas Corporation | Optical strand sensor for detecting a filament being wound and twisted on a spool |
WO1980000576A1 (en) * | 1978-09-07 | 1980-04-03 | Owens Corning Fiberglass Corp | Electro-optical control to detect filament passing through a guide-eye |
US4275297A (en) * | 1979-08-02 | 1981-06-23 | Owens-Corning Fiberglas Corporation | Electro-optical strand detector |
GB2103357A (en) * | 1981-07-16 | 1983-02-16 | Textima Veb K | An apparatus for monitoring a thread in a textile machine |
WO1987004418A1 (en) * | 1986-01-27 | 1987-07-30 | Iro, Aktiebolaget | Yarn storing device |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2358644A (en) * | 2000-01-28 | 2001-08-01 | Truetzschler Gmbh & Co Kg | Apparatus for monitoring a textile fibre sliver |
FR2804445A1 (en) * | 2000-01-28 | 2001-08-03 | Truetzschler & Co | DEVICE FOR DETECTING THE MOVEMENT AND / OR THE PRESENCE OF A STRIP FORMED OF TEXTILE FIBERS CONSTITUTED BY COTTON AND / OR CHEMICAL FIBERS, PARTICULARLY IN A DRAWING SECTION |
US6543093B2 (en) | 2000-01-28 | 2003-04-08 | TRüTZSCHLER GMBH & CO. KG | Apparatus for detecting displacements and/or presence of sliver in a fiber processing machine |
GB2358644B (en) * | 2000-01-28 | 2004-03-10 | Truetzschler Gmbh & Co Kg | Apparatus for monitoring a textile fibre sliver |
Also Published As
Publication number | Publication date |
---|---|
CS276353B6 (en) | 1992-05-13 |
JPH03174033A (en) | 1991-07-29 |
CS8905348A2 (en) | 1991-04-11 |
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Legal Events
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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 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): DE FR GB IT |
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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 |
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18D | Application deemed to be withdrawn |
Effective date: 19910928 |