EP0697477B1 - Fadenwahlvorrichtung für eine Webmaschine - Google Patents

Fadenwahlvorrichtung für eine Webmaschine Download PDF

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Publication number
EP0697477B1
EP0697477B1 EP19950101303 EP95101303A EP0697477B1 EP 0697477 B1 EP0697477 B1 EP 0697477B1 EP 19950101303 EP19950101303 EP 19950101303 EP 95101303 A EP95101303 A EP 95101303A EP 0697477 B1 EP0697477 B1 EP 0697477B1
Authority
EP
European Patent Office
Prior art keywords
signal
detecting
thread
needle
outputting
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.)
Expired - Lifetime
Application number
EP19950101303
Other languages
English (en)
French (fr)
Other versions
EP0697477A2 (de
EP0697477A3 (de
Inventor
Shigeyuki C/O Kayaba Kogyo K.K. Mutou
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
KYB Corp
Original Assignee
Kayaba Industry Co Ltd
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Filing date
Publication date
Application filed by Kayaba Industry Co Ltd filed Critical Kayaba Industry Co Ltd
Publication of EP0697477A2 publication Critical patent/EP0697477A2/de
Publication of EP0697477A3 publication Critical patent/EP0697477A3/de
Application granted granted Critical
Publication of EP0697477B1 publication Critical patent/EP0697477B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/20—Electrically-operated jacquards
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D51/00—Driving, starting, or stopping arrangements; Automatic stop motions

Definitions

  • This invention relates to a thread selecting device whereby a weaving machine selects a vertical thread according to a design or pattern.
  • a thread selecting device such as for example a jacquard is used to select a vertical thread according to the pattern.
  • Tokkai Hei 3-90646 published by the Japanese Patent Office in 1991 for example discloses a device that uses an actuator of an electromagnetic solenoid driven by an electrical signal to select a thread.
  • This thread selecting device is installed above the weaving machine, and comprises a knife which ascends and descends in synchronism with the operating cycles of the weaving machine. It further comprises a plurality of thread selecting units provided with a needle driven upwards by the knife, a hook that supports the needle in its raised position, and an electromagnetic solenoid that oscillates the hook between a position wherein the needle is supported and a position wherein the needle is released.
  • the needle is connected to vertical threads via a number of mechanisms, a thread being selected when it is supported in its raised position by the hook, and deselected when it is released and descends.
  • the knife ascends on each operating cycle of the weaving machine, and lifts the needle.
  • the solenoid When the solenoid is energized in the raised position of the needle, the hook engages with the needle, and the needle remains supported by the hook after the knife descends.
  • a required vertical thread may be selected from among a large number of candidate vertical threads.
  • the controller that energizes the solenoids is programmed to shut off current to the solenoids at the time when operation of the weaving machine is stopped, thereby preventing the solenoids from overheating.
  • this invention provides a thread selecting device for use with a weaving machine, comprising a needle for selecting a thread used in the machine according to a displacement of the needle, a mechanism for displacing the needle in synchronism with an operation of the weaving machine, an electromagnetic actuator for maintaining the needle in a predetermined position, and a mechanism for supplying energizing current to the electromagnetic actuator in conjunction with the machine operation.
  • the device further comprises a mechanism for detecting an interruption of the machine operation, and a mechanism for oscillating the energizing current when the interruption is detected.
  • the interruption detecting mechanism comprises a mechanism for detecting a rotation period of a shaft which rotates in synchronism with the machine operation and a mechanism for comparing the rotation period with a predetermined value.
  • the rotation period detecting mechanism comprises for example a mechanism for generating a pulse at an interval proportional to the rotation period and a mechanism for detecting this interval
  • the comparing mechanism comprises for example a mechanism for comparing the interval with a predetermined value.
  • the supplying mechanism comprises a mechanism for detecting a rotation position of the shaft which rotates in synchronism with the machine operation and a mechanism for outputting a signal for permitting the energizing current supply only when the position is within a predetermined range.
  • the interruption detecting mechanism preferably comprises a mechanism for determining if the permitting signal has continued for longer than a predetermined time.
  • the interruption determining mechanism may comprises a mechanism for generating a pulse having a constant frequency, a mechanism for counting pulses emitted while the energizing permission continues and a mechanism for determining if the counted number of pulses has exceeded a predetermined value.
  • the oscillating mechanism preferably comprises a mechanism for outputting an oscillating signal having a predetermined frequency when the machine operation has been interrupted and outputting a signal having a constant level at other times, a mechanism for outputting a signal being a logical product of the permitting signal and the signal output by the oscillating mechanism, and a mechanism for oscillating the energizing current based on the signal output by the outputting mechanism.
  • a thread selecting device 2 is installed above a weaving machine 3. It is driven by the weaving machine 3 via a main shaft 30 and shaft 34 connected to the main shaft 30.
  • the shaft 34 is connected to knives 7A, 7B via a reflection sleeve 31, arm 32 and link mechanism 33 as shown in Fig. 2, these knives 7A, 7B ascending and descending alternately in synchronism with the weaving cycles of the weaving machine 3.
  • a hook 6A is supported free to pivot on a hinge 43 above the knife 7A.
  • a hook 6B is supported free to pivot on the hinge 43 alongside the hook 6A above the knife 7B.
  • the hooks 6A, 6B can pivot independently of each other.
  • a solenoid 5 is installed at an upper location in order to drive the hooks 6A, 6B.
  • the hooks 6A, 6B are driven by the solenoid 5 via a mechanism shown in Fig. 4.
  • the upper end of the hook 6A (6B) pushed by a spring 12 is in contact with the armature 9. Due to the attraction of the armature to the yoke 10, the hook 6A (6B) pivots against the force of the spring 12 so that a claw 60 at the bottom end is displaced to a forward position. On the other hand, when current to the solenoid 5 is stopped, the hook 6A (6B) is pivoted by the spring 12 as it pushes the armature 9 backward, and the claw 60 is displaced to a backward position.
  • the thread 8 is raised via the pulley 41 when the other needle has ascended so that the thread 8 is selected. Further, when the hooks 6A, 6B are in their backward positions, one of the needles 4A, 4B descends when the other needle has ascended, hence the thread 8 is not pulled up and is deselected.
  • One of the solenoids 5 is therefore sufficient for both of the hooks 6A, 6B, however separate solenoids may be provided for each hook.
  • the supply and interruption of energizing current to each of the solenoids 5 is controlled by a controller 1 shown in Fig. 1.
  • the controller 1 comprises a timer 13, comparison means 14, oscillating means 15, energizing permitting means 16, data transfer control means 17, signal processing means 18, storage device 19, AND gates 20, 21 and amplifying means 22, as shown in Fig. 5.
  • the signal processing means 18, AND gate 21 and amplifying means 22 are provided for each solenoid 5.
  • Thread selecting data i.e. data regarding which vertical thread is selected at which time, is stored in the storage means 19.
  • the signal processing means 18 outputs a thread selecting signal Ds to the AND gate 20 based on this data according to a request signal Dt from the data transfer control means 17.
  • a rotary encoder 11 that generates a pulse P at an interval proportional to a rotation period is attached to the main shaft 30 which rotates in synchronism with the operation of the weaving machine 3.
  • This pulse P is input to the timer 13 of the controller 1 which measures its interval t .
  • the timer 13 is reset at every pulse input. If this input does not occur, the interval t become larger and finally exceeds a predetermined value t 1 .
  • the comparison means 14 compares the interval t with the predetermined value t 1 . If the interval t is greater than the predetermined value t 1 , it is determined that the main shaft 30 has stopped, and a stop signal St is output to the oscillating means 15.
  • the oscillating means 15 If the stop signal St is ON, the oscillating means 15 generates an output signal Ap having a predetermined frequency. On the other hand, if the stop signal St is OFF, a voltage signal (ON signal) having a predetermined level is output as the signal Ap .
  • the pulse P is also input to the energizing permitting means 16. From the pulse P , the energizing permitting means 16 determines whether or not the needles 4A, 4B are raised so that they are able to engage with the claws 60 of the hooks 6A, 6B.
  • the raised and lowered positions of the needles 4A, 4B correspond to predetermined rotation angles of the main shaft 30 as shown in Fig. 7.
  • the means 16 can detect the raised and lowered positions of the needles 4A, 4B by counting the pulses P, and determines whether or not they are within limits where they can engage with the claws 60. When it is determined that they are in an engaging position, the energizing permitting means 16 outputs a drive permission signal Ao .
  • the AND gate 20 When the signal Ap from the oscillating means 15 and the drive permission signal Ao from the energizing permitting means 16 are both ON, the AND gate 20 outputs an energizing signal As to the AND gate 21. Therefore, the energizing signal As is output when the signal Ap is generated and the signal Ao is ON.
  • the AND gate 21 When the thread selecting signal Ds and the signal As from the AND gate 20 are both ON, the AND gate 21 outputs a drive signal So to the amplifying means 22. In this case, when the energizing signal As is output and the thread selecting signal Ds is ON, the drive signal So is also generated.
  • the amplifying means 22 outputs the drive signal So to the solenoid 5 as an oscillating current amplified to a suitable level for energizing the solenoid 5.
  • the pulse P from the rotary encoder 11 is output with a predetermined period corresponding to the rotation of the main shaft 30. Also, when the rotation angle of the main shaft 30 is such that the needle can engage with the hook 6A (6B), the drive permission signal Ao has the high level (ON) shown in the figure.
  • the signal Ap from the oscillating means 15 always has the high level shown in the figure, so the output signal As from the AND gate 20 also has a high level.
  • the thread selecting signal Ds is output from the signal processing means 18, the drive signal output from the AND gate 21 is ON, i.e. it has a high level.
  • the solenoid 5 is then energized by the drive signal So amplified by the amplifying means 22, and the hook 6A (6B) engages with the needle 4A (4B) as shown in Figs. 3, 4.
  • the hook 6A engages with the needle 4A as shown in Fig. 3(a)
  • the thread 8 is pulled up via the pulley 41 when the needle 4B ascends as shown in Fig. 3(b), and the thread 8 is thereby selected.
  • the energizing permitting means 16 switches the drive permission signal Ao to OFF.
  • the outputs from the AND gates 20, 21 then both drop to low level (OFF), the drive signal So drops to low level, and the energizing of the solenoid 5 is stopped.
  • the thread selecting signal Ds is OFF, the drive signal So is permanently OFF regardless of the drive permission signal Ao , so the thread 8 is not selected. During operation of the weaving machine 3, therefore, the thread 8 is selected according to the thread selecting signal Ds .
  • the signals output by the AND gates 20 and 21 also oscillate.
  • the solenoid 5 therefore switches alternately ON and OFF with a predetermined frequency, and is intermittently energized.
  • the oscillating means 15 If operation of the weaving machine 3 stops at a time Td when the drive permission signal Ao is OFF, the oscillating means 15 generates the signal Ap from a time Te when the interval t exceeds the set time t 1 . In this case, however, as the drive permission signal Ao is OFF, the signals As , So output by the AND gates 20, 21 are both OFF, and the solenoid 5 is not energized.
  • a rotation sensor for detecting the rotation speed of the shaft 34, and an angle sensor for detecting the rotation angle of the shaft 34 corresponding to the energizing permission range shown in Fig. 7, may be provided instead of the rotary encoder 11 as rotation detection means.
  • Fig. 8 shows another embodiment of this invention concerning the structure of the controller.
  • the controller 1 comprises a pulse generator 23, counter 24 and comparison means 25 instead of the timer 13 and comparison means 14.
  • the pulse generator 23 generates a pulse at an interval proportional to the rotation period of the shaft 30.
  • the counter 24 counts the pulses after the drive permission signal Ao from the energizing permitting means 16 is ON so as to obtain a count number N , and resets the count number N when the energizing permission signal Ao is OFF.
  • the comparison means 25 outputs a stop signal St when the count number N exceeds a set value N 1 .
  • the counter 24 When the weaving machine 3 stops at a time Tc when the drive permission signal Ao and thread selecting signal Ds are both ON and the solenoid 5 is energized, the counter 24 has counted the pulses from when the drive permission signal Ao is ON. At a time Td when the count number N exceeds the set value N 1 , the comparison means 25 switches the stop signal St to ON, and the oscillating means 15 generates the signal Ap with a predetermined frequency.
  • the signals As and So output by the AND gates 20, 21 are both oscillated, and the solenoid 5 is intermittently energized at a predetermined frequency. Overheating due to energizing current is therefore prevented while the solenoid 5 supports the needle 4A or 4B.
  • the shaft 34 resumes rotation, the drive permission signal Ao switches OFF and the count number N of the counter 24 is reset.
  • the oscillating means 15 therefore stops the oscillation of the signal Ap , the signal Ap thereafter being maintained at a high level.
  • the weaving machine 3 is determined to have stopped operation by counting the pulses from the time when the drive permission signal Ao changes. This makes it unnecessary to directly detect the rotation speed or period of the main shaft 30 or shaft 34, so the construction of the device is simpler than that of the aforesaid first embodiment.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Sewing Machines And Sewing (AREA)

Claims (6)

  1. Fadenwählvorrichtung (2) zum Einsatz mit einer Webmaschine (3), die eine Nadel (4A, 4B) zum Auswählen eines Fadens (8), der in der Maschine (3) eingesetzt wird, entsprechend einer Verschiebung der Nadel (4A, 4B), eine Einrichtung (7A, 7B) zum Verschieben der Nadel (4A, 4B) synchron zu einem Betrieb der Maschine (3), ein elektromagnetisches Betätigungselement (5), das die Nadel an einer vorgegebenen Position hält, sowie eine Einrichtung (11, 16, 17, 18, 19, 22) zur Zufuhr von Erregungsstrom zu dem elektromagnetischen Betätigungselement (5) zusammen mit dem Betrieb der Maschine umfaßt, dadurch gekennzeichnet, daß die Vorrichtung (2) weiterhin umfaßt:
    eine Einrichtung (11, 13, 14, 23, 24, 25), die eine Unterbrechung des Betriebs der Maschine erfaßt, und
    eine Einrichtung (15, 20, 21), die den Erregungsstrom in Schwingung versetzt, wenn die Unterbrechung erfaßt wird.
  2. Fadenwählvorrichtung (2) nach Anspruch 1, wobei die Erfassungseinrichtung (11, 13, 14, 23, 24, 25) eine Einrichtung (11, 13) umfaßt, die eine Drehperiode einer Welle (30, 34) erfaßt, die sich synchron zu dem Betrieb der Maschine dreht, sowie eine Einrichtung (14), die die Drehperiode mit einem vorgegebenen Wert vergleicht.
  3. Fadenwählvorrichtung (2) nach Anspruch 2, wobei die Drehperioden-Erfassungseinrichtung (11, 13) eine Einrichtung (11) umfaßt, die einen Impuls in einem Intervall proportional zu der Drehperiode erzeugt, sowie eine Einrichtung (13), die das Intervall erfaßt, und wobei die Vergleichseinrichtung (14) eine Einrichtung umfaßt, die das Intervall mit einem vorgegebenen Wert vergleicht.
  4. Fadenwählvorrichtung (2) nach Anspruch 1, wobei die Zuführeinrichtung (11, 16, 17, 18, 19, 22) eine Einrichtung (11) umfaßt, die eine Drehposition einer Welle (30, 34) erfaßt, die sich synchron zu dem Betrieb der Maschine dreht, sowie eine Einrichtung (16), die ein Signal zum Zulassen der Erregungsstrom-Zufuhr nur dann ausgibt, wenn die Position in einem vorgegebenen Bereich liegt, und wobei die Unterbrechungs-Erfassungseinrichtung (11, 13, 14, 23, 24, 25) eine Einrichtung (14) umfaßt, die feststellt, ob das Zulaßsignal länger als eine vorgegebene Zeit vorhanden ist.
  5. Fadenwählvorrichtung (2) nach Anspruch 1, wobei die Zuführeinrichtung (11, 16, 17, 18, 19, 22) eine Einrichtung (11) umfaßt, die eine Drehposition einer Welle (30, 34) umfaßt, die sich synchron zum Betrieb der Maschine dreht, sowie eine Einrichtung (16), die ein Signal zum Zulassen der Erregungsstromzufuhr nur dann ausgibt, wenn die erfaßte Position in einem vorgegebenen Bereich liegt, und wobei die Unterbrechungs-Feststelleinnrichtung (11, 13, 14, 23, 24, 25) eine Einrichtung (23) umfaßt, die einen Impuls mit einer konstanten Frequenz erzeugt, eine Einrichtung (24), die Impulse zählt, die bei anhaltender Erregungszulassung ausgegeben werden, sowie eine Einrichtung (25), die feststellt, ob die gezählte Anzahl von Impulsen einen vorgegebenen Wert übersteigt.
  6. Fadenwählvorrichtung (2) nach Anspruch 1, wobei die Zuführeinrichtung eine Einrichtung (11) umfaßt, die eine Drehposition einer Welle (30, 34) erfaßt, die sich synchron zum Betrieb der Maschine dreht, sowie eine Einrichtung (16), die ein Signal ausgibt, das die Erregungsstromzufuhr nur dann zuläßt, wenn die Position in einem vorgegebenen Bereich liegt, und wobei die Schwingeinrichtung (15, 20, 21) eine Einrichtung (15) umfaßt, die ein Schwingsignal mit einer vorgegebenen Frequenz ausgibt, wenn der Betrieb der Maschine unterbrochen worden ist, und ansonsten ein Signal mit konstantem Pegel ausgibt, eine Einrichtung (20), die ein Signal ausgibt, das ein logisches Produkt aus dem Zulassungssignal und dem von der Schwingeinrichtung (15) ausgegebenen Signal ist, sowie eine Einrichtung (21), die den Erregungsstrom auf der Grundlage des von der Ausgabeeinrichtung (20) ausgegebenen Signals schwingen läßt.
EP19950101303 1994-08-18 1995-01-31 Fadenwahlvorrichtung für eine Webmaschine Expired - Lifetime EP0697477B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP194297/94 1994-08-18
JP19429794A JP3373665B2 (ja) 1994-08-18 1994-08-18 織機の経糸選択装置
JP19429794 1994-08-18

Publications (3)

Publication Number Publication Date
EP0697477A2 EP0697477A2 (de) 1996-02-21
EP0697477A3 EP0697477A3 (de) 1997-09-03
EP0697477B1 true EP0697477B1 (de) 2000-05-24

Family

ID=16322258

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19950101303 Expired - Lifetime EP0697477B1 (de) 1994-08-18 1995-01-31 Fadenwahlvorrichtung für eine Webmaschine

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EP (1) EP0697477B1 (de)
JP (1) JP3373665B2 (de)
DE (1) DE69517104T2 (de)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09176936A (ja) * 1995-12-26 1997-07-08 Kayaba Ind Co Ltd 織機の経糸選択装置
BE1010133A3 (nl) * 1996-04-10 1998-01-06 Wiele Michel Van De Nv Gaapvormingsinrichting voor een textielmachine.
BE1010134A3 (nl) * 1996-04-10 1998-01-06 Wiele Michel Van De Nv Gaapvormingsinrichting voor een textielmachine.
DE19651190C1 (de) * 1996-12-10 1998-06-10 Mayer Textilmaschf Elektromagnetisch arbeitende Jacquard-Steuervorrichtung
DE10149969A1 (de) 2001-10-10 2003-05-08 Dornier Gmbh Lindauer Verfahren zur drehwinkelabhängigen Ansteuerung von Betätigungseinrichtungen einer mit einer Webmaschine kombinierten Jacquardvorrichtung
DE10149970A1 (de) * 2001-10-10 2003-05-08 Dornier Gmbh Lindauer Verfahren zur Ansteuerung von Betätigungseinrichtungen einer mit einer Webmaschine kombinierten Jacquardvorrichtung
KR100976929B1 (ko) * 2008-04-16 2010-08-18 소진수 실공급방법, 경사공급방법, 실공급장치 및 직조방법

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2587045B1 (fr) * 1985-09-06 1987-10-23 Staubli Verdol Dispositif pour la formation de la foule d'un metier a tisser comportant un crochet de retenue basculant
DD285519A7 (de) * 1988-01-05 1990-12-19 Veb Webstuhlbau Karl-Marx-Stadt -Kombinat Textima-,Dd Jaquardmaschine mit elektronischer platinenauswahlsteuerung, insbesondere fuer eine webmaschine
DE3833480A1 (de) * 1988-02-23 1989-08-31 Textima Veb K Elektromagnetische platinenauswahlsteuerung fuer die jacquardmaschine einer webmaschine
IT1238334B (it) * 1990-01-23 1993-07-12 Dispositivo elettromagnetico a struttura modulare, attuabile tramite elaboratore, per la selezione programmata e la relativa alzata dei fili di ordito nella produzione di tessuti operati
US5095952A (en) * 1991-01-03 1992-03-17 Yu Hsiu Hsia Cheng Electromagnetic heald rod retention system for a jacquard system

Also Published As

Publication number Publication date
EP0697477A2 (de) 1996-02-21
EP0697477A3 (de) 1997-09-03
DE69517104T2 (de) 2000-09-21
JPH0860481A (ja) 1996-03-05
DE69517104D1 (de) 2000-06-29
JP3373665B2 (ja) 2003-02-04

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