EP0009840B1 - Schussfadenwechsel-system für Webstühle - Google Patents

Schussfadenwechsel-system für Webstühle Download PDF

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Publication number
EP0009840B1
EP0009840B1 EP19790200536 EP79200536A EP0009840B1 EP 0009840 B1 EP0009840 B1 EP 0009840B1 EP 19790200536 EP19790200536 EP 19790200536 EP 79200536 A EP79200536 A EP 79200536A EP 0009840 B1 EP0009840 B1 EP 0009840B1
Authority
EP
European Patent Office
Prior art keywords
weft
lever
colour
arm
selection system
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
EP19790200536
Other languages
English (en)
French (fr)
Other versions
EP0009840A1 (de
Inventor
Roger R. Lampaert
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.)
Weefautomaten Picanol NV
Original Assignee
Weefautomaten 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 Weefautomaten Picanol NV filed Critical Weefautomaten Picanol NV
Publication of EP0009840A1 publication Critical patent/EP0009840A1/de
Application granted granted Critical
Publication of EP0009840B1 publication Critical patent/EP0009840B1/de
Expired legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
    • D03D47/00—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms
    • D03D47/34—Handling the weft between bulk storage and weft-inserting means
    • D03D47/38—Weft pattern mechanisms

Definitions

  • the present invention relates to a weft selection system for looms.
  • the looms therein contemplated are shuttleless multi-colour looms equipped with Jacquard or dobby mechanisms.
  • the object of the present invention is to prevent such drawbacks by providing a new weft selection system which has not the above- mentioned shortcomings.
  • FIG. 1 gives a general view of the device according to an embodiment of the invention.
  • the nature of the weaving pattern and the sequence of the various colours in the fabric are ordered by a Jacquard or a dobby mechanism M.
  • These data are sent to a device consisting of a series of pulling hooks or levers, each lever relating either to the weaving pattern proper or to the colour of the weft thread being presented.
  • the levers relating to the selection of the colour of the weft thread only are considered.
  • the device in which said levers are disposed in called a colour selector A which additionally comprises also the same number of contactless switches cooperating with the said levers.
  • the signals emitted by said switches are synchronized in a device C with periodical signals produced by a damping disc D mounted on the driving shaft of the loom or of the dobby or Jacquard mechanism, and a contactless switch S, whereby the synchronization device C transmits signals to a device B which then presents the thread to the gripper and which is called for brevity the "weft presenter".
  • FIG. 2 shows a cross-section of a colour selector A in rest position, that is to say in a position in which the concerned colour is not selected.
  • This colour selector A comprises substantially a casing 1 in which are mounted a series of levers 2 and the same number of contactless switches 3. Each lever 2 is actuated by the previously mentioned Jacquard or dobby mechanism M according to the colour selected by the said mechanism for the next following weft.
  • Each lever 2 comprises substantially two individual arms 4 and 5 which are so mounted on a common axis or spindle 6 that a small friction plate 9 made of metal or synthetic material is mounted between their ends 7 and 8 receiving the common axis 6, the said ends 7 and 8 clamping the said small friction plate 9 with a defined force under the influence of a spring 10 mounted on the axis 6.
  • the arm 5 of the lever 2 has a transverse plate-shaped end 11, whereas the end 12 of the arm 4 is provided to cooperate with the Jacquard or dobby mechanism M.
  • the casing 1 has a groove- shaped opening 13 in which the arm 4 of the lever 2 may be freely shifted upwardly and downwardly according to the control of the mechanism M.
  • a stop 14 preventing the small plate 11 of the arm 5 from being spaced too far from the contactless switch 3 when the arm 4 is moved upwardly.
  • the contactless switch 3 will be energized by the small plate 11, which provides a substantial saving of time since it is not necessary to wait until the arm 4 is situated in its lowest position for energizing the switch 3.
  • the maximum distance on which the small plate 11 may be moved corresponds to the angle a and is determined by the localization of the stop 14, on one hand, and of a stationary stop 15 on the other hand.
  • the contactless switch 3 must be so adjusted that, in the highest position of the small plate 11, a free space is always kept between the said plate 11 and the lowermost portion of the contactless switch 3.
  • the distance which the small plate 11 must be shifted in order to re-energize the switch 3, corresponds to the angle f3 and is characteristic for the used contactless switch.
  • the signal for a colour selection may be produced in two ways.
  • the first way relies on the application of a simple system whereby for each individual colour, there is provided only one double lever and, accordingly, also only one contactless switch. Owing to the fact that this method requires only one lever per colour, some difficulties may be experienced, more particularly when manufacturing multicoloured fabrics which have also an intricate structure pattern since the total number of available levers is anyhow limited.
  • this system is advantageous in that, in case of rupture of a lever, no colour is presented and, consequently, after the weft control, the loom is immediately stopped since no weft is presented.
  • the second way of producing a signal for colour selection comprises using a binary system, whereby n switches are sufficient for selecting 2" different colours.
  • This method relies on the undamping of the contactless switches according to the binary system, in other words the selection of a colour is, in the present case, depending on the fact that a small number of various switches are energized or not.
  • the colour selector will continuously produce signals corresponding with the colour selected at any moment by the mechanism M.
  • care must be taken so that the pulses produced in the colour selector are introduced perfectly at the exact moment in the weft presenter B. It is the reason why each of the said pulses is firstly stored in a synchronization device C until the said synchronization device receives a pulse coming from the contactless switch S which is periodically damped and de-energized by a damping disc D mounted on a shaft 16 of the loom or the dobby or Jacquard mechanism.
  • the damping disc D passes periodically before the contactless switch S, thereby producing every time a pulse.
  • the localization of the disc D relative to the zero position of the rotating axis of the loom is very critical with respect to the obtaining of a perfect synchronization for presenting the thread to the gripper.
  • Figure 6 shows a diagram representing the shed opening, in ordinate, as a function of the rotation, in abscissa, of the axis of the loom.
  • This diagram shows the second half portion of a period P o , a full period P and the first half portion of the following period P 2 .
  • the points 18-19 show respectively the beginning and the end point of the full period P l'
  • the shed begins to close again and the arm 4 of the lever 2 is in its lowest position when the colour corresponding to said lever 2 has not been selected for the weft corresponding to the preceding period P o .
  • said colour is now selected for the following period P 2
  • the arm 4 of the lever 2 will be shifted upwardly and the arm 5 will follow this movement in the opposite direction.
  • the contactless switch 3 is de-energized, thereby producing the signal for the colour selection. This occurs when the axis of the loom is rotated in the period P o through an angle corresponding with the point 21 in the diagram of Figure 6.
  • the arm 5 When the arm 4 moves further upwardly, the arm 5 will be further shifted downwardly until this movement is blocked by the stop 14.
  • the maximum distance which the arm 5 may be moved downwardly is determined by the angle ⁇ .
  • the arm 4 may then continue moving upwardly, but the arm 5 is kept in rest position against the stop 14. This is possible owing to the already described double construction of the lever 2.
  • the signal for the colour selection of a weft corresponding to a period P 2 is already produced during the second half portion of the preceding period P l .
  • a pulse must be also produced by means of the already mentioned damping disc D and the contactless switch S which are situated outside the colour selector A, whereby the frequency with which the switch S is energized and de-energized, is directly influenced by the angular speed of the axis of the loom.
  • the damping disc D is preferably displaced by about 270° relative to the zero point of the rotating axis of the loom.
  • the so produced pulse is periodically repeated and it coincides at the soonest with the pulse of the colour selector (indicated at the point 21), and essentially a long time before the moment at which the gripper penetrates the shed of the following period P Z .
  • the moment at which this pulse is generally produced is indicated by way of example in the diagram by the point 22.
  • the signals coming from the colour selector are then also transmitted to the weft presenter B ( Figure 5).
  • the weft presenter B comprises substantially a casing 23 in which an electromagnet 24, a hinged armature 25, a cam 26, an intermediate lever 27 and a lever 28 are mounted for each individual colour.
  • a colour is selected by the mechanism M and via the colour selector A, the pulse produced therein is transmitted at the suitable time, through the synchronisation device C, to the weft presenter B, thereby energizing the electromagnet 24 and pulling downwardly the hinged armature 25.
  • a cam 26 imparts a swinging movement to the intermediate lever 27.
  • the intermediate lever 27 will be able to move freely round the axis 30 since it is not retained by the hinged armature 26 and the thread of the concerned colour will not be presented to the gripper.
  • the hinged armature 25 is then attracted by the electromagnet 24 and its end 31 will prevent the swinging movement of the intermediate lever 27 round the axis 30.
  • the intermediate lever 27 will be periodically tilted against the end 31 of the hinged armature 25 so that the axis 30 is laterally reciprocated through the small wheel 29 and the guide 32, thereby also driving an intermediate bar 34 connecting the end 35 of the intermediate lever 27 with the lever 28 which is rotatably mounted relative to an axis 36.
  • the arm 37 fixedly secured on the lever 28 will present periodically the thread of the desired colour to the gripper. It is apparent that a similar device must be provided for each different colour.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)

Claims (4)

1. Schussfadenwähler für mit einem Jacquard- bzw. Schachtmechanismus ausgestattete Webmaschinen, wobei ein oder mehrere Schussfäden durch diesen Jacquard- bzw. Schacht-mechanismus gewählt werden und der jeweils gewählte Schussfaden durch eine Schussfadenübertragungsvorrichtung auf den Einschussmechanismus übertragen wird, dadurch gekennzeichnet, dass er aus den folgenden Teilen besteht:
- ein eigentlicher, aus mehreren auf einer gemeinschaftlichen Welle (6) angeordneten Schwenkhebeln bestehender Schussfadenwähler, wobei jeder Schwenkhebel aus zwei gesonderten Hebelarmen (4, 5) besteht, welche durch Reibungskupplung auf der vorgenannten Welle (6) mittels eines geeigneten Reibungssystems miteinander verbunden sind, einer dieser beiden Arme (4) mit dem Jacquard- bzw. Schachtmechanismus verbunden ist, die Schwenkung des zweiten Armes (5) derart durch zwei Anschläge (14, 15) beschränkt wird, dass der Höchstschwenkungswinkel konstant, unabhängig vom erstgenannten Arm (4) ist, und jeder zweite Arm (5) einen Schalter (3) zwecks Aussendung von Zeichen betreffs des jedesmal gewählten Schussfadens betätigt;
- ein Zeitschalter (S, D), bestehend aus einem kontaktlosen Schalter (S), dessen Betätigung durch die Rotation der Hauptwelle der Webmaschine zwecks Aussendung von sich in Phasengleichheit mit ihr befindlichen Zeitzeichen stattfindet;
- ein Synchronisiergerät (C), dass die vorgenannten Zeichen betreffs des jedesmal gewählten Schussfadens, sowie die vorgenannten Zeitzeichen empfängt, wobei die erstgenannten Zeichen in einem Gedächtnis gespeichert werden bis zum Eintreffen der Zeitzeichen und sodann;
- auf einen Schussfadenüberträger (B) übertragen werden, dessen Aufgabe es ist jedesmal den betreffenden Schussfaden dem Einschussmechanismus zu überreichen.
2. Schussfadenwähler gemäss dem Anspruch 1, dadurch gekennzeichnet, dass die vorgenannte Reibungskupplung aus einem geeigneten Material, wie z.B. einem geeigneten Metall oder Kunststoff, hergestellten Reibungsplättchen (9) besteht, das zwischen den beiden vorgenannten Hebelarmen (4, 5) durch eine auf der vorgenannten Welle angeordnete Druckfeder (10) eingeklemmt wird.
3. Schussfadenwähler gemäss dem Anspruch 1, dadurch gekennzeichnet, dass die Farbwahl gemäss eniem Binärverfahren stattfindet, das die Wahl von 2" verschiedenen Farben mittels n Doppelhebel (4, 5) und einer entsprechenden Anzahl kontaktloser Schalter (3) ermöglicht.
4. Schussfadenwähler gemäss dem Anspruch 1, dadurch gekennzeichnet, dass der vorgenannte Schussfadenüberträger (B) im wesentlichen, aus einem Gehäuse (23) besteht, das für jede Farde einen Elektromagneten (24), eine gelenkig aufgehängte Armatur (25), einen Nocken (26), einen Zwischenhebel (27) und einen Hebel (28) enthält, wobei beim Eintreffen eines Farbauswahlzeichens der entsprechende Elektromagnet (24) erregt wird und die gelenkig aufgehängte Armatur (25) nach unten zieht, demzufolge unter dem Einfluss der ununterbrochenen Rotation des vorgenannten Nockens (26), dem vorgenannten Zwischenhebel (29) eine Pendelbewegung um das eine Ende der Armatur (25) erteilt wird, welche Bewegung mittels eines Stabs (31) auf einen Hebel (28) übertragen wird, der mit einem Arm (37) für das überreichen des betreffenden Schussfadens an eine Fadenklemme versehen ist.
EP19790200536 1978-10-03 1979-09-25 Schussfadenwechsel-system für Webstühle Expired EP0009840B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL7809969 1978-10-03
NL7809969A NL174376C (nl) 1978-10-03 1978-10-03 Inrichting voor het kiezen van inslagdraden.

Publications (2)

Publication Number Publication Date
EP0009840A1 EP0009840A1 (de) 1980-04-16
EP0009840B1 true EP0009840B1 (de) 1984-01-18

Family

ID=19831644

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19790200536 Expired EP0009840B1 (de) 1978-10-03 1979-09-25 Schussfadenwechsel-system für Webstühle

Country Status (6)

Country Link
EP (1) EP0009840B1 (de)
JP (1) JPS5551849A (de)
DE (3) DE7926892U1 (de)
ES (1) ES484648A1 (de)
NL (1) NL174376C (de)
YU (1) YU223179A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3716124C1 (de) * 1987-05-14 1988-07-21 Picanol Nv Schussfadenwechselvorrichtung an Webmaschinen zum wahlweisen Bewegen von Vorlagefingern

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE889254A (nl) * 1981-06-17 1981-12-17 Picanol Nv Inrichting voor het besturen van spuitkoppen en andere onderdelen van een luchtgetouw
BE1002764A6 (nl) * 1989-01-23 1991-05-28 Wiele Michel Van De Nv Stuurmechanisme voor het selecteren van inslagdraden bij grijperweefmachines.
US5074340A (en) * 1989-07-05 1991-12-24 Sulzer Brothers Limited Yarn selector unit for a weft feeder

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2814315A (en) * 1956-05-08 1957-11-26 Lyle Charles Needle loom

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3716124C1 (de) * 1987-05-14 1988-07-21 Picanol Nv Schussfadenwechselvorrichtung an Webmaschinen zum wahlweisen Bewegen von Vorlagefingern

Also Published As

Publication number Publication date
NL174376B (nl) 1984-01-02
NL7809969A (nl) 1980-04-09
DE2966557D1 (en) 1984-02-23
EP0009840A1 (de) 1980-04-16
ES484648A1 (es) 1980-06-16
NL174376C (nl) 1984-06-01
DE9840T1 (de) 1983-01-20
JPS5551849A (en) 1980-04-15
DE7926892U1 (de) 1980-02-14
YU223179A (en) 1982-10-31

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