EP0052155B1 - Dispositif pour la détection des cassures de fils de chaîne dans un métier à tisser - Google Patents

Dispositif pour la détection des cassures de fils de chaîne dans un métier à tisser Download PDF

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Publication number
EP0052155B1
EP0052155B1 EP80107079A EP80107079A EP0052155B1 EP 0052155 B1 EP0052155 B1 EP 0052155B1 EP 80107079 A EP80107079 A EP 80107079A EP 80107079 A EP80107079 A EP 80107079A EP 0052155 B1 EP0052155 B1 EP 0052155B1
Authority
EP
European Patent Office
Prior art keywords
switch
control circuit
contact
counter
shaft
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
Application number
EP80107079A
Other languages
German (de)
English (en)
Other versions
EP0052155A1 (fr
Inventor
Theodor Wagner
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.)
C C Egelhaaf GmbH and Co Maschinenfabrik KG
Original Assignee
C C Egelhaaf GmbH and Co Maschinenfabrik KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by C C Egelhaaf GmbH and Co Maschinenfabrik KG filed Critical C C Egelhaaf GmbH and Co Maschinenfabrik KG
Priority to EP80107079A priority Critical patent/EP0052155B1/fr
Priority to AT80107079T priority patent/ATE8672T1/de
Priority to DE8080107079T priority patent/DE3068723D1/de
Publication of EP0052155A1 publication Critical patent/EP0052155A1/fr
Application granted granted Critical
Publication of EP0052155B1 publication Critical patent/EP0052155B1/fr
Expired legal-status Critical Current

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Classifications

    • 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
    • D03D51/28—Warp stop motions electrical
    • D03D51/32—Detector healds
    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D49/00—Details or constructional features not specially adapted for looms of a particular type
    • D03D49/04—Control of the tension in warp or cloth
    • D03D49/18—Devices for indicating warp tension

Definitions

  • the invention relates to a device for determining warp thread bridges in weaving machines with at least two heald frames and electrically conductive and mutually insulated support rails having areas that can be bridged by the metallic healds, the contact point of each heald of a heald frame with a support rail forming a switch in a control circuit, which forms one Has contactgage pulse counter with preselection in conjunction with an erasable memory error display circuit that controls a shutdown circuit of the weaving machine.
  • registration organs are required to determine whether a shaft is in its flat position or in its lower position, because in the upper position the healds inevitably rest on their mounting rail and thus give contact; an error message in the upper position of a heald frame cannot be received.
  • a problem that is difficult to overcome for devices for determining warp thread breaks is that the rapid movement of the heald frames makes it possible for the healds to jump to a certain degree in the lower shed position of the heald frame, especially when working with low warp thread tension and a correspondingly loose thread guide. Short-term contacts can then be made in the control circuit, even if no warp thread is broken.
  • the healds of one heald can briefly come into contact with the healds of the adjacent heald frame.
  • the invention has for its object to provide a device for the detection of warp thread breaks, which allows a safe and optional selection of the query times in the sub-position of the individual heald frames and thus creates the prerequisite that an unwanted shutdown of the loom by a «jumping of unthreaded threads leading healds is prevented.
  • control circuit for each heald frame has a control circuit which leads via a switch operated by the heald frame in its sub-position
  • the control circuit is an adjustable device for limiting the by Actuation time of the switch given maximum polling time both with respect to the beginning of the polling time and the end of the polling time.
  • the device for limiting the query time can advantageously consist of a counter of a predetermined number of stages, which can be triggered by the sub-compartment switch and, over a certain range of its counting sequence, the start and end of which can be set by means of a selector switch, an output signal which can be used to switch off the weaving machine into the control circuit delivers.
  • the invention thus allows, in the sub-position of the individual heald frames which is only suitable for the query, to place the query time in a section of the total time in which the heald frame is at rest in the sub-position, in which this depends on various factors, in particular the warp thread tension and the type of warp thread used, dependent «jumping of the healds has subsided and has not yet started again.
  • the device can therefore be adapted to any weaving machine setting.
  • the device can expediently have in its control circuit a display device which is connected to the first input and the output of each assigned mixing stage and displays the signals occurring there.
  • the best thing here is a screen device on which the false breaking signals that occur due to the “jumping” of the healds are shown and the area in which the healds have calmed down and therefore no jumping contact is made is recognizable.
  • the device designed according to the invention it can be achieved with all weaving machine settings that the machine is actually only switched off in the event of warp thread breaks and is not triggered by a simple “jumping” of the unbraided healds.
  • FIG. 1 schematically shows a heald frame 10 which can be moved up and down in the machine frame 11 in the direction of the double arrow 12 between a flat position and a lower position.
  • the drive takes place via rods 13 and a lever linkage which is of no interest here.
  • the heald frame 10 is one of a plurality of heald frames which are arranged closely behind one another in a parallel position.
  • Each heald frame has an upper shaft rod 14, a lower shaft rod 15 and heald support rails 16 and 17 running parallel thereto.
  • Metallic healds 18 are pushed onto the heald support rails, each of which guides a warp thread, not shown.
  • Fig. 3 the upper part of a heald 18 is shown.
  • the upper strand support rail 16 is designed as a contact rail. As shown in FIG. 2, it is divided into a left rail half 161 and a right rail half 16r, which are electrically insulated from one another. Both rail halves have an electrically conductive core 20 and 21 and an electrically conductive outer jacket 19, which is separated from the cores 20/21 by an insulation layer. Only at the ridge point of the heddle support rail are the metallic cores 20 or 21 exposed, so that there is contact between the cores 20/21 and the outer jacket 19 of the heddle support rail 16 via the healds 18 when the healds 18 lie on the heddle support rail 16.
  • Fig. 3 shows the heald 18 in the raised state, in which no contact is made.
  • a heald 18 only makes contact when the inclined contact surface 22 in the head of the heald comes to rest against the non-insulated ridge surface 23 of the heald support rail 16, namely the left or right carrier rail half 161 or 16r.
  • the inclined contact surface 22 ensures that the heald moves forward and thus also comes to rest on the outer casing 19 and forms the desired contact bridge which leads from the core 20 or 21 to the outer casing 19 of the upper heald support rail 16.
  • the core 20 of the left mounting rail half 161 and the core 21 of the right mounting rail half 16r are each connected via separate flexible cables 24 and 25 to the control circuit 30 arranged on the stationary part of the machine, the construction of which is explained below with reference to FIGS. 4 and 5.
  • Another flexible cable 26 connects the outer sheath 19 of the mounting rail 16 to the control circuit 30.
  • Another control line 29 leads from the control circuit 30 via a switch 31 which can be closed by the heald frame 10 in its lower compartment position shown in FIG. 1.
  • control circuit 30 shows only the display side of the circuit housing.
  • FIG. 4 symbolically shows on the left-hand side of the picture the current-carrying parts of assumed four heald frames I-IV which are to be monitored for warp thread breaks.
  • the individual parts of the device for determining the warp thread breaks are shown in the block diagram of FIG. 4, however, only in connection with the heald frame I.
  • From the heald frame I are the switching line 29 with the switch 31 actuated by the shaft in the low position, the cable 25 leading to the core of the right mounting rail half of the heald frame and the cable 24 leading to the core of the left mounting rail half, each of which leads to a symbolically drawn switch 37 or 38, which are formed by the healds with their mounting rail and close when the thread breaks, shown.
  • the cable 26 leading to the outer jacket 19 (FIG. 1) of the mounting rail 16 (FIG. 1) and connected to a voltage source is also shown symbolically.
  • a counter 39 with, for example, nine stages is arranged in the interior of the housing of the control circuit, to the input of which the switching line 29 leads via the shaft-operated switch 31.
  • the two decade counters 35 and 36, each having nine switch positions, are connected to the nine stages of this counter 39.
  • the main contact of both decade switches 35 and 36 is connected via a line 41 and 42, respectively, to a pulse shaper stage 40, which is the query Output pulse 44 determining the device via an output line 43 once to the display device 32 and on the other hand to the inputs b of a first mixing stage 45 assigned to the right heald frame and a mixing stage 46 assigned to the left heald frame.
  • the inputs a of the two mixing stages 45 and 46 which each act like AND gates, are connected to the cables 25 and 24 via the switching bridges symbolically indicated by the switches 38 and 37 and formed by the healds.
  • the outputs c of the two mixing stages 45 and 46 are connected on the one hand via one-way diodes 47 to a further input of the display device 32 and on the other hand in each case to an input of a memory 48 or 49.
  • Outputs of the two memories 48 and 49 are each connected to a display lamp 28r or 281 and to reed relays 51 and 50.
  • the reed relays 50 and 51 switch an input of the previously mentioned preset counter 34, as symbolically indicated by a switch 55.
  • the preselection counter 34 is connected via an erase line 54 to erase inputs 52 and 53 of the two memories 48 and 49. Via an output line 56, the preselection counter 34 influences a switch-off circuit (not shown) for the drive part of the weaving machine to be monitored.
  • the curve 57 of the movement of a heald frame is shown in the lower part with a curve 57. Every heald frame is moved from a sub-position to an upper position and vice versa. Both in the lower shed position and in the upper shed position there is a standstill of the heald frames indicated by horizontal sections 58 and 59 of curve 57. 3, the warp threads guiding healds 18 according to FIG. 3 must be lifted off the holding rail 16 when the associated warp thread is not broken. In contrast, in the upper compartment standstill region, ie the curve section 59, the healds 18 lie on the mounting rail 16 (FIG. 3) and bring about contact with the switches 37 and 38. In FIG.
  • Curve 60 shows that when the heald frame moves down towards the sub-position, the previous permanent contact of the healds 18 ceases because the healds of the healds on the mounting rails mentioned at the beginning begin, which manifests itself in individual tension peaks 61 and which also occurs.
  • the healds 18 only come after a certain settling time t 1 , the duration of which depends on the type of thread used, the warp thread tension set and also whether it is the first, second, third or fourth etc.
  • the contact curve 60 is depicted in sections on the screen of the viewing device 32, so that an operator can determine after what time delay t 1 after the heald frame has stopped in the sub-compartment position or the switch 31 has been closed by the heald frame in the sub-compartment position of the tension-free section 62 of the Contact curve 60 begins and the "jumping of healds 18 causing tension peaks 61 stops.
  • the counter 39 begins with its counting sequence, which is represented by nine rectangular pulses 1-9 of the counting signal curve 66 shown.
  • the counter starts at level zero, counts up to level nine and then goes back to its zero position.
  • the counting stage is selected based on the contact curve 60 appearing on the display device 32, upon reaching which the contact curve 60 has reached its voltage-free section 62. In the illustrated embodiment, this is counting level three.
  • the first decade switch 35 thus determines the start of the polling time of the device and places it in the voltage-free area 62 of the contact curve 60.
  • the end of the query time is determined and also set so that it also falls within the voltage-free area 62 of the contact curve 60.
  • the second decade switch 36 is set to the counter level five.
  • the output signal curve 67 of the pulse shaping stage 40 which is entered in FIG. 1, has the drawn-in course with the rectangular pulse 44 determining the query time.
  • the counter 39 begins a counting sequence each time the switch 31 is closed by the monitored heald frame which has reached its sub-position.
  • the interrogation pulse 44 occurs between its counting stages three and five the inputs b of the two mixing stages 45 and 46. If, during this time, one of the healds 18 of the right or left half of the shaft forms a contact bridge on the heald frame due to a thread break and thus closes the switch 37 or 38 symbolically shown in FIG. 4, one or the other mixing stage 45 and 46 also occurs at the inputs a a voltage, which is represented by the section 65 of the contact curve 60 in FIG. Then the output c of the mixer stage 45 or 46 in question supplies an output signal to the associated memory 48 or 49.
  • the memories have the form of a flip-flop and cause the indicator lamps 28r to light up or, at the same time, they deliver an output pulse at the outputs c of their associated outputs Mixing stage 45 or 46 sends an output signal to the reed relays 50 and 51.
  • the preselection counter 34 is thereby switched by one step by actuating the switch 55 shown in FIG. 4 and thereby delivers an erasing pulse to the extinguishing line 24 and the extinguishing inputs 52 or 53 of the memories 48 and 49, as a result of which these memories are erased again.
  • this advancement of the preselection counter 34 is repeated with subsequent deletion of the memories 48 and 49 up to the switching number of the preselection counter 34 specified at the switch 33 (FIG. 1) sent, the memories 48 and 49 no longer erased, so that the indicator lamps 28r and 281 continue to light up.
  • the weaving machine is switched off via line 56.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Treatment Of Fiber Materials (AREA)

Claims (6)

1. Dispositif pour détecter des cassures de fils de chaîne dans un métier à tisser ayant au moins deux lames et des tringles-supports (16) conductrices électriques et isolées les unes des autres, présentant des zones shuntables par des lisses métalliques (18), l'endroit de contact de chaque lisse (18) d'une lame avec une tringle-support (16) formant un interrupteur dans des moyens de commande qui comprennent un compteur d'impulsions représentatives de contacts avec présélection en liaison avec un circuit d'indication de défauts comprenant une mémoire effaçable et commandant un circuit de déconnexion du métier à tisser, caractérisé en ce que les moyens de commande comprennent pour chaque lame (I-IV) un circuit de commande qui est excité à travers un interrupteur (31) activité par la lame en position basse, et en ce que les moyens de commande comprennent un dispositif réglable (compteur 39) pour limiter la durée maximale de réponse déterminée par la durée d'activation de l'interrupteur (31) aussi bien relativement au début de la durée de réponse qu'également à la fin de la durée de réponse.
2. Dispositif selon la revendication 1, caractérisé en ce que le dispositif pour limiter la durée de réponse consiste en un compteur (39) ayant un nombre prédéterminé d'étages qui est déclenché par l'interrupteur de position basse (31) et qui délivre dans les moyens de commande un signal de sortie (44) destiné à déconnecter le métier à tisser pendant une durée déterminée de son opération de comptage dont le début et la fin sont réglables par des commutateurs sélectifs (35, 36).
3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que la sortie du compteur (39) commandée par les commutateurs sélectifs (35, 36) est reliée à une première entrée (b) d'un étage mélangeur (45, 46) à deux entrées (a, b) à la seconde entrée (a) duquel sont reliés les endroits de contact (37, 38) des lisses (18) avec la lame associée (tringle-support 16), et en ce qu'une sortie (c) de l'étage mélangeur (45, 46) active par excitation simultanée des deux entrées (a + b) est reliée à une mémoire effaçable (48, 49), d'un circuit d'indication de défauts des moyens de commande.
4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que chaque lame (I-IV) est partagée d'une manière connue en au moins deux circuits de mesure, l'un à gauche et l'autre à droite, et à chaque circuit de mesure (câble de liaison 24, 25) sont associés un étage mélangeur (45, 46) des moyens de commande et une mémoire (48, 49) du circuit d'indication de défauts.
5. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que les moyens de commande comprennent un appareil de visualisation (32) qui est relié à la première entrée (b) et la sortie (c) de chaque étage mélangeur associé (45, 46) et qui indique des signaux correspondants (44, 60).
6. Dispositif selon la revendication 5, caractérisé en ce que l'appareil de visualisation (32) est un appareil à écran pour image.
EP80107079A 1980-11-15 1980-11-15 Dispositif pour la détection des cassures de fils de chaîne dans un métier à tisser Expired EP0052155B1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP80107079A EP0052155B1 (fr) 1980-11-15 1980-11-15 Dispositif pour la détection des cassures de fils de chaîne dans un métier à tisser
AT80107079T ATE8672T1 (de) 1980-11-15 1980-11-15 Einrichtung zur feststellung von kettfadenbruechen in webmaschinen.
DE8080107079T DE3068723D1 (en) 1980-11-15 1980-11-15 Apparatus for the detection of broken warps in looms

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP80107079A EP0052155B1 (fr) 1980-11-15 1980-11-15 Dispositif pour la détection des cassures de fils de chaîne dans un métier à tisser

Publications (2)

Publication Number Publication Date
EP0052155A1 EP0052155A1 (fr) 1982-05-26
EP0052155B1 true EP0052155B1 (fr) 1984-07-25

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ID=8186894

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80107079A Expired EP0052155B1 (fr) 1980-11-15 1980-11-15 Dispositif pour la détection des cassures de fils de chaîne dans un métier à tisser

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EP (1) EP0052155B1 (fr)
AT (1) ATE8672T1 (fr)
DE (1) DE3068723D1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5217992B2 (ja) 2008-12-10 2013-06-19 株式会社豊田自動織機 織機における経糸切断検出装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB377568A (en) * 1931-01-21 1932-07-28 Otto Held Improvements in electrical warp controlled stopping mechanism for looms
CH171002A (de) * 1933-05-12 1934-08-15 Jacob Kaufmann John Webschaft mit elektrischer Kettenfadenwächtereinrichtung.
DE2308699A1 (de) * 1973-02-22 1974-09-05 Curt Wagner Elektrischer geschirrkettfadenwaechter
US4135554A (en) * 1976-10-16 1979-01-23 Miyuki Gotoh Device for detecting the loss of tension of a warp yarn in a weaving loom
DE2921963C2 (de) * 1979-05-30 1983-10-20 Fa. C.C. Egelhaaf, 7410 Reutlingen Einrichtung zur Feststellung von Kettfadenbrüchen in Webmaschinen

Also Published As

Publication number Publication date
DE3068723D1 (en) 1984-08-30
EP0052155A1 (fr) 1982-05-26
ATE8672T1 (de) 1984-08-15

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