EP0238420A1 - Überwachungsanlage für die Anwesenheit von Einzelfäden in einem Parallelfadenfell - Google Patents

Überwachungsanlage für die Anwesenheit von Einzelfäden in einem Parallelfadenfell Download PDF

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Publication number
EP0238420A1
EP0238420A1 EP87420039A EP87420039A EP0238420A1 EP 0238420 A1 EP0238420 A1 EP 0238420A1 EP 87420039 A EP87420039 A EP 87420039A EP 87420039 A EP87420039 A EP 87420039A EP 0238420 A1 EP0238420 A1 EP 0238420A1
Authority
EP
European Patent Office
Prior art keywords
teeth
parallel
web
wire
detection device
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
EP87420039A
Other languages
English (en)
French (fr)
Other versions
EP0238420B1 (de
Inventor
G. Pierre Campin
Jean-Pierre Dumas
Michel Gré
Alain Legay
André Langlet
Yvon Madec
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.)
Le Textile Delcer SA
Original Assignee
Le Textile Delcer SA
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 Le Textile Delcer SA filed Critical Le Textile Delcer SA
Priority to AT87420039T priority Critical patent/ATE46926T1/de
Publication of EP0238420A1 publication Critical patent/EP0238420A1/de
Application granted granted Critical
Publication of EP0238420B1 publication Critical patent/EP0238420B1/de
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
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B35/00—Details of, or auxiliary devices incorporated in, knitting machines, not otherwise provided for
    • D04B35/10—Indicating, warning, or safety devices, e.g. stop motions
    • D04B35/14—Indicating, warning, or safety devices, e.g. stop motions responsive to thread breakage
    • D04B35/16—Indicating, warning, or safety devices, e.g. stop motions responsive to thread breakage with detectors associated with a series of threads

Definitions

  • the invention relates to a new type of detector for the presence of an individual thread in a sheet of parallel threads and more particularly in a warp knitting machine; it also relates to trades comprising such detectors.
  • a wire detector sometimes also incorrectly called “wire breaker” is asked: - first of all, not to scratch the thread that runs, or to modify its tension; - then, to have the lowest possible inertia, so that the stop devices of the machine can be actuated quickly, at least before the detected fault reaches the working members (needles, heddles, etc.) ; - Finally, to be compact, sensitive to low voltages, that is to say voltages of the order of a gram, which nevertheless can fluctuate around this value.
  • the invention overcomes these drawbacks. It targets a detector device of the last type in question, which is effective, compact, sensitive, does not scratch the wire, does not modify its tension, has low inertia, or is operational in most positions, which the we did not know how to obtain industrially until then, and finally be economical to build, assemble, operate and finally does not complicate the journey of the wire.
  • This device for detecting the presence of an individual wire in a sheet of parallel wires of the type constituted by: - Means for scrolling the sheet of parallel son; - A means arranged on one side and in the vicinity of this traveling web, capable of detecting the presence of a wire spaced from the web by a blowing means disposed on the other side of said web; a means, actuated by the detection means, for stopping the scrolling means or triggering an alarm system, is characterized : - in that it consists, in a known manner, of a plurality of parallel comb teeth, between which the threads pass in passing; - And in that the blowing means is placed at the base of said teeth and directs the air flow towards the tip of these teeth.
  • the invention consists in using comb teeth which, in known manner, serve to regularly space each wire, but also, and this is new, serve to channel the flow of air blown to the base of the teeth and so to move the wire relaxed or broken towards the detection means and this, with sufficient force, although generated by a low air flow.
  • comb teeth which, in known manner, serve to regularly space each wire, but also, and this is new, serve to channel the flow of air blown to the base of the teeth and so to move the wire relaxed or broken towards the detection means and this, with sufficient force, although generated by a low air flow.
  • the characteristic teeth have a window placed in the area located towards the tip of the tooth and the detection means is directed through this window;
  • the detection means consists of: . either preferably by a light beam, parallel to the plane of the sheet and orthogonal to the moving wires, disposed in the vicinity of the tips of the teeth and which preferably passes through the windows formed therein, .
  • a sensor wire arranged in the same way, but brought to a high electrical potential or traversed by a high frequency current, so that this wire, under the effect of contact with a textile wire to be checked, relaxed or broken, discharged, thereby controlling the shutdown of the loom or the triggering of the alarm system;
  • the light beam passes through windows made in the teeth, then is picked up by a member such as a photo-sensitive receiving lens, either directly or after reflection and through said windows; this receiving member is associated with the means for controlling the stop of the loom or the triggering of the alarm signal;
  • the entry allows just the passage of a knot, in order to minimize the necessary air flow and to properly channel the flow towards the tips of the teeth;
  • the detector device of the invention simultaneously forms a divider comb of a warp knitting loom.
  • the teeth are full and the incident and reflected beams of the detection member or the detector wire are either on the same side of the tooth, or on either side thereof, but in above the tablecloth plane.
  • a warp knitting machine consists of two or more beams (1) from which run sheets of parallel threads (2) passing respectively in order over two stitches (3) and (4) between which a dividing comb (5) is disposed.
  • the tablecloth then passes over a tension bar (6), then arrives from there to the passers (7) of the passettes (8) for knitting. The whole is integral with the building of the trade.
  • the dividing comb (5) comprises a plurality of teeth (10) regularly spaced as a function of the gauge of the dimension of a node and parallel to each other.
  • Each individual wire designated by the reference (11) passes between two successive teeth (10,12,13, 14) (see Figure 3).
  • the teeth position the wires together to prevent them from mixing during movement.
  • the teeth (10,12,13,14) are fixed by their base (15) in a common block (16) with several teeth, forming a comb holder, for example made of plastic or lead.
  • the teeth (10), made of sheet steel or any other metal resistant to abrasion, comprise in known manner at their points (17) a small orifice (18) through which passes a steel wire intended to facilitate placing the wires (11) between the teeth when threading.
  • each comb tooth (10) has: - on the one hand, in the vicinity of the point (17), a window (20); - on the other hand, at the base (15), a nozzle intended to direct a flow of pressurized air towards the point (17) of each of the teeth.
  • the comb holder (16) is mounted on a tubular support (21) supplied with compressed air, at a pressure for example of the order of one to several decimetres of water column.
  • This support (21) is split on its entire length and this slot constitutes with the teeth (12, 13) of the comb the interdental blowing nozzle.
  • this characteristic opening (22) is as small as possible, and channels all the air flow represented by dotted lines towards the point (17) of the teeth (10) and more precisely towards the window (20). It is this flow which moves the broken or relaxed wire (11), and causes it to excite the detector.
  • the detection system comprises a box (23) comprising a diode (or a laser) intended to emit through a projection lens (24) a light beam (25) which thus passes through the tunnel formed by the set of windows (20), successive teeth (10-14) parallel.
  • a light beam (25) which thus passes through the tunnel formed by the set of windows (20), successive teeth (10-14) parallel.
  • this light ray (25) has passed through all of the lights (20), it arrives on a mirror (26), for example of the retro-reflector type, to reflect and cross again these same windows (20) to come onto a another lens (27) associated with a receiver.
  • the system includes a signal amplifier (28) which is itself associated with the control (29) for stopping the loom or the alarm system.
  • the nozzle (22) is not placed exactly under the tooth but in the vicinity swimming immediately and as provided for in the definition at its base. As before, the air flow is directed towards the tip of the tooth. This solution avoids clogging of the nozzle and the gap between two teeth.
  • the light beam (25) is no longer reflected at (26) but is detected directly by a cell similar to (27) arranged in place of the mirror (26).
  • This solution is more suited to large width knitting looms, that is 2.50 m and more wide.
  • the light beam or the detector wire can be placed in the immediate vicinity of the tip of the teeth and slightly outside thereof. This solution then makes it possible to use standard tooth combs.
  • the system for detecting the presence of an individual wire has many advantages compared to the systems marketed to date.
  • these devices can be used successfully, not only in the warp knitting looms, but also in all other devices in which it is necessary to monitor the plies of parallel threads in movement, such as the looms, the beams gluing machines, warping machines.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Knitting Machines (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Looms (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Warping, Beaming, Or Leasing (AREA)
EP87420039A 1986-02-13 1987-02-10 Überwachungsanlage für die Anwesenheit von Einzelfäden in einem Parallelfadenfell Expired EP0238420B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87420039T ATE46926T1 (de) 1986-02-13 1987-02-10 Ueberwachungsanlage fuer die anwesenheit von einzelfaeden in einem parallelfadenfell.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8602118A FR2594147B1 (fr) 1986-02-13 1986-02-13 Detecteur de la presence d'un fil individuel dans une nappe de fils paralleles.
FR8602118 1986-02-13

Publications (2)

Publication Number Publication Date
EP0238420A1 true EP0238420A1 (de) 1987-09-23
EP0238420B1 EP0238420B1 (de) 1989-10-04

Family

ID=9332194

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87420039A Expired EP0238420B1 (de) 1986-02-13 1987-02-10 Überwachungsanlage für die Anwesenheit von Einzelfäden in einem Parallelfadenfell

Country Status (6)

Country Link
US (1) US4727732A (de)
EP (1) EP0238420B1 (de)
JP (1) JPS62276062A (de)
AT (1) ATE46926T1 (de)
DE (1) DE3760679D1 (de)
FR (1) FR2594147B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103397473A (zh) * 2013-08-07 2013-11-20 浙江金世达实业有限公司 一种经编机的断线保护系统

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015110519B3 (de) * 2015-06-30 2016-06-16 Protechna Herbst Gmbh & Co. Kg Überwachungseinrichtung zum Überwachen einer Fadenschar an einer Textilmaschine

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH478050A (de) * 1968-03-29 1969-09-15 Appalachian Electronic Instr Vorrichtung zur Anzeige von Fadenbrüchen in mindestens einer Fadenbahn sowie Verwendung der Vorrichtung
DE1951916A1 (de) * 1969-10-15 1971-04-22 Sick Erwin Fa UEberwachungsvorrichtung fuer Kettfaeden von Kettenwirkmaschinen
DE2034815A1 (en) * 1970-07-14 1972-01-20 Fa. Erwin Sick, 7808 Waldkirch Yarn monitor - using laser beam and series of angled mirrors to give photo-electric yarn break detection

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3575515A (en) * 1969-06-25 1971-04-20 Appalachian Electronic Instr Beam of yarn sheet monitoring apparatus
FR2061848A5 (de) * 1969-06-27 1971-06-25 Fiorucci Georges
US3628030A (en) * 1970-10-15 1971-12-14 Appalachian Electronics Instr Broken end detection system for warpers utilizing novel optical system
US3738124A (en) * 1971-04-08 1973-06-12 Deering Milliken Res Corp Knitting machine stop motion
ES249980Y (es) * 1980-03-25 1981-01-01 Parahilos para telar perfeccionado
DE3200524A1 (de) * 1982-01-11 1983-07-21 Dura Tufting Gmbh, 6400 Fulda Fadenbruchabstelleinrichtung fuer textilmaschinen, insbesondere tuftingmaschinen
DE3335656C2 (de) * 1983-09-30 1986-08-28 Protechna Herbst GmbH & Co KG, 8012 Ottobrunn Vorrichtung zur fotoelektrischen Überwachung einer Kettenwirkmaschine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH478050A (de) * 1968-03-29 1969-09-15 Appalachian Electronic Instr Vorrichtung zur Anzeige von Fadenbrüchen in mindestens einer Fadenbahn sowie Verwendung der Vorrichtung
DE1951916A1 (de) * 1969-10-15 1971-04-22 Sick Erwin Fa UEberwachungsvorrichtung fuer Kettfaeden von Kettenwirkmaschinen
DE2034815A1 (en) * 1970-07-14 1972-01-20 Fa. Erwin Sick, 7808 Waldkirch Yarn monitor - using laser beam and series of angled mirrors to give photo-electric yarn break detection

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103397473A (zh) * 2013-08-07 2013-11-20 浙江金世达实业有限公司 一种经编机的断线保护系统

Also Published As

Publication number Publication date
US4727732A (en) 1988-03-01
JPS62276062A (ja) 1987-11-30
FR2594147B1 (fr) 1988-04-01
DE3760679D1 (en) 1989-11-09
EP0238420B1 (de) 1989-10-04
ATE46926T1 (de) 1989-10-15
FR2594147A1 (fr) 1987-08-14

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