EP0309012A1 - Pneumatische Fadenklemme und Vorrichtung zum Lösen eines Schussfadens aus der Anschlagkante an Webmaschinen mit solcher Klemme - Google Patents

Pneumatische Fadenklemme und Vorrichtung zum Lösen eines Schussfadens aus der Anschlagkante an Webmaschinen mit solcher Klemme Download PDF

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Publication number
EP0309012A1
EP0309012A1 EP88201571A EP88201571A EP0309012A1 EP 0309012 A1 EP0309012 A1 EP 0309012A1 EP 88201571 A EP88201571 A EP 88201571A EP 88201571 A EP88201571 A EP 88201571A EP 0309012 A1 EP0309012 A1 EP 0309012A1
Authority
EP
European Patent Office
Prior art keywords
suction
pneumatic
wire clamp
wire
clamp
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
EP88201571A
Other languages
English (en)
French (fr)
Other versions
EP0309012B1 (de
Inventor
Henry Shaw
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.)
Picanol NV
Original Assignee
Picanol NV
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 Picanol NV filed Critical Picanol NV
Publication of EP0309012A1 publication Critical patent/EP0309012A1/de
Application granted granted Critical
Publication of EP0309012B1 publication Critical patent/EP0309012B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • D03D51/06—Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping
    • D03D51/08—Driving, starting, or stopping arrangements; Automatic stop motions using particular methods of stopping stopping at definite point in weaving cycle, or moving to such point after stopping
    • D03D51/085—Extraction of defective weft
    • 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
    • B65H63/08—Warning or safety devices, e.g. automatic fault detectors, stop-motions ; Quality control of the package responsive to delivery of a measured length of material, completion of winding of a package, or filling of a receptacle
    • B65H63/088—Clamping device
    • 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 present invention relates to a pneumatic wire gripper.
  • the present invention relates to a device intended for detaching, on a weaving machine, a weft thread from the threshing line using such a pneumatic clamp.
  • the present invention relates to a pneumatic wire clamp whose application systematically excludes the drawbacks which have just been mentioned.
  • the wire clamp according to the invention essentially consists of a suction element provided with at least one suction orifice which can interact with a weaving thread, as well as a thread guide device arranged around the suction port.
  • the wire clamp consists of a tubular suction element, one of the axial ends of which is closed and the other end of which is connected to a suction system; on this suction element, the wire guide device is constituted by a V-shaped cutout arranged in the side wall of the tubular element, the suction orifice being placed in the bottom of the V-shaped cutout
  • the pneumatic wire gripper 1 mainly consists of a suction element 2 provided, on the one hand, with at least one suction orifice 3 which can interact with a and a single wire 4 and, on the other hand, a wire guide device 5 adjoining the suction orifice 3.
  • the suction element 2 is formed by a simple tubular element closed at its lower end 6, the wire guide devices 5 being formed of a V-shaped cutout and the suction orifice 3 being located in the bottom 7 of the V-shaped cutout.
  • FIG. 1 The use of this device is clearly shown in Figures 1 and 2.
  • the device itself consists essentially of a pneumatic clamp for wire 1 which is moved towards a wire 4; the wire guide device 5 automatically feeds the wire to the bottom 7 of the V-shaped cutout, where the wire is retained by the suction opening 3.
  • FIG. 2 it is clear that the opening 3 will be completely or almost completely blocked by the presence of the wire 4, which has the advantage that the clamp will never take more than one wire at a time.
  • FIG. 3 uses a suction element 2 composed of an air intake channel 8, an air evacuation channel 9 and a mechanism 10, placed in the air evacuation channel and making it possible to create a depression at the level of the suction orifice 3.
  • the air supply channel 8 communicates from below with the air evacuation channel 9.
  • the mechanism 10 creates a local tightening 11, for example by means of a bulge in the wall 12 opposite the suction orifice 3.
  • the air supply channel 8 can receive a compressed air connection 13.
  • the operation of the clamp essentially rests on the fact that the air flow 14 expelled by the compressed air connection 13 creates, at the level of the constriction 11, a depression such that it generates a secondary air flow 15 causing a suction effect through port 3.
  • FIG. 4 represents an alternative embodiment in which the mechanism 10 is formed by a spherical or piriform body 16 mounted in the air evacuation channel 9 and which, driven by a screw device 17 controlled from the end 6 of the pneumatic clamp 1, can move in the channel 9, so that the vacuum, that is to say the suction force at the orifice 3, is adjustable.
  • this alternative embodiment also provides for the mounting, near the suction orifice 3, of a detection element 18, for example an opto-electric sensor, in order to detect the presence of a wire 4 in the clamp.
  • a detection element 18 for example an opto-electric sensor
  • this device essentially consists of a pin 20 which can slide in front of the V-shaped cutout 5. It is clear that the movement of the pin 20 can be controlled in any way, for example by electromagnetic or pneumatic means.
  • the clamp can be provided with either a detection element 18, or a locking device 19, or both.
  • FIG. 5 represents a device 21 allowing, on a weaving machine, to detach from the threshing line 22 of the fabric 23, a weft thread 4 already beaten but having created, for example a false pick.
  • this device 21 consists of a movement mechanism 24 to which the wire clamp 1 is fixed, the assembly being constructed in such a way that the suction orifice 3 of the clamp can be presented to the threshing line 22.
  • the pneumatic pliers for thread 1 is brought close to the threshing line 22 in a plane parallel to the warp threads 25 forming the shed 26 of the weaving machine .
  • the pneumatic clamp for wire 1 and in particular the suction element 2, consists of a tubular structure of great finesse and that the end 6 is pointed so that the clamp 1 can be introduced without difficulty between the warp threads 25.
  • the movement mechanism can be executed in a similar manner to the movement mechanism for mechanical elements as described in the Dutch patent application 8602827.
  • FIGS. 6 to 8 illustrate a method according to which a beaten weft thread 4 can be detached from the threshing line or the tightening line of pick 22 using the wire clamp 1.
  • the clamp is first introduced into the shed 26 according to the movement indicated by the arrow 27 to be presented to the weft thread 4 concerned.
  • the clamp is then pneumatically actuated to suck up the weft thread 4 concerned, which will be detached from the fabric 23 during the return movement of the clamp for thread 1, as shown in FIG. 8.
  • Figures 9 and 10 give a schematic view of some other applications.
  • FIG. 9 represents a fabric 23 whose ends of picks 29, called ends, are retained, with a separation, by threads called selvedge threads 28.
  • the thread clamp 1 is presented in the interval between ordinary warp threads 25 and the selvedge threads 28 and can, as shown in FIG. 9, be used to detach the weft thread 4 at the height of the end 29, after which the weft thread 4 can be handled according to a known method, for example that described in the Dutch patent application 8602827 of the applicant.
  • a weft thread 4 is completely detached from the threshing line 22 by a step-by-step movement of the thread clamp 1, which performs, during each of its stops, a cycle of work as shown in FIGS. 6 to 8.
  • the step-by-step movement can, for example, be carried out according to the method described in the Dutch patent application 8602827, with the difference, however, that in this application, the detachment of the wire is carried out by mechanical means.
  • the present invention is in no way limited to the embodiments described by way of example and shown in the accompanying drawings; on the contrary, the pneumatic clamp for thread according to the invention, as well as the device intended for detaching, on weaving machines, a weft thread from the threshing line using such a clamp for thread, can be made in any shape without departing from the scope of the invention.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Quality & Reliability (AREA)
  • Looms (AREA)
EP19880201571 1987-07-28 1988-07-20 Pneumatische Fadenklemme und Vorrichtung zum Lösen eines Schussfadens aus der Anschlagkante an Webmaschinen mit solcher Klemme Expired - Lifetime EP0309012B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE8700834A BE1000791A4 (nl) 1987-07-28 1987-07-28 Pneumatische draadklem en inrichting voor het bij weefmachines van de aanslaglijn losmaken van een inslagdraad die zulke draadklem toepast.
BE8700834 1987-07-28

Publications (2)

Publication Number Publication Date
EP0309012A1 true EP0309012A1 (de) 1989-03-29
EP0309012B1 EP0309012B1 (de) 1991-11-27

Family

ID=3882788

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880201571 Expired - Lifetime EP0309012B1 (de) 1987-07-28 1988-07-20 Pneumatische Fadenklemme und Vorrichtung zum Lösen eines Schussfadens aus der Anschlagkante an Webmaschinen mit solcher Klemme

Country Status (3)

Country Link
EP (1) EP0309012B1 (de)
BE (1) BE1000791A4 (de)
DE (1) DE3866492D1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0336388A2 (de) * 1988-04-06 1989-10-11 Tsudakoma Corporation Vorrichtung zum Entfernen von Schussfäden
EP0458736A1 (de) * 1990-05-21 1991-11-27 Gebrüder Sulzer Aktiengesellschaft Schussbruchbehebung bei Projektilwebmaschinen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE954490C (de) * 1951-09-07 1956-12-20 Reiners Walter Dr Ing Saugrohr mit einer Verschlussklappe zum Erfassen und Festhalten von Fadenenden an Spulmaschinen, insbesondere selbsttaetigen Spulmaschinen
DE3517117A1 (de) * 1985-05-11 1986-11-13 Georg Sahm GmbH & Co KG, 3440 Eschwege Absaugpistole fuer monofilamente, baendchen und andere faeden

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE954490C (de) * 1951-09-07 1956-12-20 Reiners Walter Dr Ing Saugrohr mit einer Verschlussklappe zum Erfassen und Festhalten von Fadenenden an Spulmaschinen, insbesondere selbsttaetigen Spulmaschinen
DE3517117A1 (de) * 1985-05-11 1986-11-13 Georg Sahm GmbH & Co KG, 3440 Eschwege Absaugpistole fuer monofilamente, baendchen und andere faeden

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0336388A2 (de) * 1988-04-06 1989-10-11 Tsudakoma Corporation Vorrichtung zum Entfernen von Schussfäden
EP0336388A3 (de) * 1988-04-06 1991-11-27 Tsudakoma Corporation Vorrichtung zum Entfernen von Schussfäden
EP0458736A1 (de) * 1990-05-21 1991-11-27 Gebrüder Sulzer Aktiengesellschaft Schussbruchbehebung bei Projektilwebmaschinen
US5158120A (en) * 1990-05-21 1992-10-27 Sulzer Brothers Limited Clearing a weft yarn break in a loom

Also Published As

Publication number Publication date
DE3866492D1 (de) 1992-01-09
EP0309012B1 (de) 1991-11-27
BE1000791A4 (nl) 1989-04-04

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