EP0052155A1 - 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
EP0052155A1
EP0052155A1 EP80107079A EP80107079A EP0052155A1 EP 0052155 A1 EP0052155 A1 EP 0052155A1 EP 80107079 A EP80107079 A EP 80107079A EP 80107079 A EP80107079 A EP 80107079A EP 0052155 A1 EP0052155 A1 EP 0052155A1
Authority
EP
European Patent Office
Prior art keywords
switch
control circuit
heald frame
counter
heald
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
Application number
EP80107079A
Other languages
German (de)
English (en)
Other versions
EP0052155B1 (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 breaks in looms 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 Contacting pulse counter with preselection in conjunction with an erasable memory error display circuit that controls a shutdown circuit of the loom.
  • registration organs are required with which it is determined whether a shaft is in its upper compartment position or in its lower compartment position, because in the upper compartment 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 allows a certain "jumping" of the healds 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 determining warp thread breaks, which allows a safe and optional determination 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 non-torn Preventing 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 into the control circuit that can be used to switch off the weaving machine delivers.
  • the invention thus allows, in the sub-position of the individual heald frames which is exclusively 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 which occur there.
  • the best thing here is a screen device on which the false breaking signals that occur as a result of 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 visible. In this way it can be achieved with the device designed according to the invention in 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 unbroken 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 an upper compartment position and a lower compartment 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 several 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.
  • the metallic cores 20 or 21 are only exposed at the ridge point of the heddle support rail, 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 rest 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 heddle support rail 16.
  • the core 20 of the left mounting rail half 161 and 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 jacket 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 schematically with the switch 31 actuated by the shaft in the low position, which to the core of the right-hand support half of the heald frame leading cable 25 and the cable 24 leading to the core of the left half of the mounting rail, each leading to a symbolically drawn switch 37 and 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 sends an output pulse 44 which determines the polling time of the device via an output line 43 to the display device 32 and to the inputs b of one of the right heald frames assigned first mixing stage 45 and a mixing stage 46 assigned to the left half of the 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 with an indicator lamp 28r or 281 and with Reed relays 51 and 50 connected.
  • 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.
  • the contact between the switches 37 and 38 is on the upper one Curve 60 can be seen, which is shown on the same time scale as the heald frame movement curve 57.
  • the contact curve 60 shows that with the downward movement of the heald frame in the direction of the lower shed position, the previous one Permanent contact of the healds 18 ceases because the above-mentioned "jumping" of the healds on the mounting rails begins, which manifests itself in individual tension peaks 61 and which also occurs when the movement curve 57 of the heald frame has already reached the standstill area 58.
  • 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 shown in sections on the screen of the viewing device 32, so that an operator can determine the time delay t 1 after the stopping of the heald frame in the Lower position or the closing of the switch 31 by the heald frame in the lower position of the tension-free section 62 of the contact curve 60 begins and the "jumping" of the healds 18 which causes the 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.
  • the counter 39 begins a counting sequence. Between its counting stages three and five, the interrogation pulse 44 occurs at 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 respective mixing stage 45 or 46 delivers 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 or 281 to light up. At the same time, they deliver when an output pulse occurs at the outputs c their assigned mixer 45 or 46 an output signal to the reed relays 50 and 51.
  • the preselection counter 34 is switched d a-by one step by actuating the switch 55 shown in FIG the delete inputs 52 and 53 of the memories 48 and 49, whereby these memories are deleted again. With further output pulses during the interrogation time, this switching on 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 out, 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.
  • the preselection counter 34 is also still within the polling time selected by means of the counter 39 and the decade switches 35 and 36, a safeguard against a response of the device to short-term voltage peaks caused by jumping healds is made.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Treatment Of Fiber Materials (AREA)
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 true EP0052155A1 (fr) 1982-05-26
EP0052155B1 EP0052155B1 (fr) 1984-07-25

Family

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

Country Status (3)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2196567A1 (fr) * 2008-12-10 2010-06-16 Kabushiki Kaisha Toyoda Jidoshokki Appareil pour détecter une cassure du fil de chaîne dans un métier à tisser

Citations (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
DE2746276A1 (de) * 1976-10-16 1978-04-20 Nissan Motor Vorrichtung zum feststellen des spannungsverlustes eines kettfadens in einem webstuhl
DE2921963A1 (de) * 1979-05-30 1980-12-18 Egelhaaf C C Fa Einrichtung zur feststellung von kettfadenbruechen in webmaschinen

Patent Citations (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
DE2746276A1 (de) * 1976-10-16 1978-04-20 Nissan Motor Vorrichtung zum feststellen des spannungsverlustes eines kettfadens in einem webstuhl
DE2921963A1 (de) * 1979-05-30 1980-12-18 Egelhaaf C C Fa Einrichtung zur feststellung von kettfadenbruechen in webmaschinen

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2196567A1 (fr) * 2008-12-10 2010-06-16 Kabushiki Kaisha Toyoda Jidoshokki Appareil pour détecter une cassure du fil de chaîne dans un métier à tisser
CN101787609B (zh) * 2008-12-10 2012-01-04 株式会社丰田自动织机 织机中检测经纱断头的设备
US8352063B2 (en) 2008-12-10 2013-01-08 Kabushiki Kaisha Toyota Jidoshokki Apparatus for detecting break in warp yarn in loom

Also Published As

Publication number Publication date
DE3068723D1 (en) 1984-08-30
ATE8672T1 (de) 1984-08-15
EP0052155B1 (fr) 1984-07-25

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