EP0382998B1 - Push control device for weaving needles in a jacquard machine - Google Patents

Push control device for weaving needles in a jacquard machine Download PDF

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Publication number
EP0382998B1
EP0382998B1 EP19890810550 EP89810550A EP0382998B1 EP 0382998 B1 EP0382998 B1 EP 0382998B1 EP 19890810550 EP19890810550 EP 19890810550 EP 89810550 A EP89810550 A EP 89810550A EP 0382998 B1 EP0382998 B1 EP 0382998B1
Authority
EP
European Patent Office
Prior art keywords
wire
voltage
control device
solenoids
push control
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 - Lifetime
Application number
EP19890810550
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0382998A2 (en
EP0382998A3 (en
Inventor
Kunihiro Takemura
Masaru Aokawa
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.)
Takemura Seisakusho KK
Original Assignee
Takemura Seisakusho KK
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Filing date
Publication date
Application filed by Takemura Seisakusho KK filed Critical Takemura Seisakusho KK
Publication of EP0382998A2 publication Critical patent/EP0382998A2/en
Publication of EP0382998A3 publication Critical patent/EP0382998A3/en
Application granted granted Critical
Publication of EP0382998B1 publication Critical patent/EP0382998B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • D—TEXTILES; PAPER
    • D03—WEAVING
    • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
    • D03C3/00—Jacquards
    • D03C3/20—Electrically-operated jacquards

Definitions

  • This invention relates to a push control device for weaving needles in a jacquard machine and, more particularly, to an improved push control device for weaving needles in a jacquard machine which permits satisfactory back-and-forth movement of a movable core for pushing weaving needles in a jacquard machine through solenoid excitation.
  • a needle-push control device of this sort such as one previously developed by the present applicant, has been known.
  • the known push control device is such that, as Figs. 5(a) and 5(b) show, latch-type solenoids 3a ... of one layer construction are connected to wire rows 17a ... and wire columns 18a ... arranged in a matrix fashion; and for example, a voltage different from that applied to wire columns 18a ... is applied to wire rows 17a ... and by changing the polarity of the voltage applied to the wire columns 18a ... the solenoids 3a are selectively excited for individual rows or columns thereby to move the movable cores 10a ... back and forth.
  • the device by applying a given voltage to the wire rows 17a ... and wire columns 18a ... arranged in a matrix fashion, a plurality of solenoids 3a ... can be excited; and therefore, the device provides advantages that the electric capacity requirement can be reduced and that the control circuit can be simplified and thus the device can be of a compact arrangement.
  • Another difficulty is that in order to change the directions of current in the wire rows 17a ... and wire columns 18a ..., two transistors 26, 26 each must be connected to the wire rows 17a ... and wire columns 18a ....
  • the prior-art device involves a fatal problem that when voltages of different polarities are applied to the wire columns 18a ... arranged in a matrix fashion, as Fig. 5(b) shows, a so-called internal reflux current in the direction of arrow B flows through solenoids 3a ... to adjacent wire columns 18b to which a voltage of a different polarity is applied and, therefore, the solenoids 3a ... cannot properly operate.
  • This invention is directed to overcoming the foregoing problems with the prior art, and accordingly it is an object of the invention to provide a push control device for weaving needles in a jacquard machine which simplifies the construction of the device while maintaining the above stated advantage of the prior-art arrangement, and which assures speedy and accurate operation.
  • a push control device for weaving needles in a jacquard machine wherein voltage is applied to wire rows 17 and wire columns 18 arranged in a matrix fashion in order to excite latch-type solenoids 3, whereby movable cores 10 for pushing the needles can be moved back and forth, said device being characterised in that the solenoids 3 are of a two layer construction comprsing a suction coil 4 and a release coil 5, and in that either the wire rows 17 or the wire columns 18 are each comprised of two wires.
  • each wire column is comprised of two wires
  • a given voltage is applied to one of the column wires 18 ... and a voltage of a different value from that applied to the one column wire 18 is applied to the wire rows 17 ...
  • a magnetic field is developed through the solenoid 3 so that each of the movable cores 10 ... moves forward and the movable core 10 is sucked onto the latch-type solenoid 3.
  • solenoids of a two-layer construction having a suction coil and a release coil are connected to a wiring arrangement of a matrix fashion in which either the wire rows or the wire columns are each comprised of two wires, and this provides the following advantages:
  • numeral 1 designates a needle-push control device mounted to a jacquard machine having laterally projecting needles 2 ... arranged therein, the push control device being back and forth movable in a direction toward the jacquard machine (direction of arrow A) by the action of shifting means (not shown).
  • each solenoid is of a two layer construction consisting of a suction coil 4 and a release coil 5 wound in a direction opposite to the suction coil 4 and placed inner side thereof.
  • One end of the suction coil 4 is connected to a terminal pin 6 and the other end thereof is connected, together with one end of the release coil 5, to a terminal pin 7.
  • the other end of the release coil 5 is connected to a terminal pin 8.
  • a permanent magnet 9 is attached to the front end of each solenoid 3.
  • Numeral 10 designates a generally rod shaped movable core which is back and forth movably inserted in each solenoid 3 through a coil spring 11, the movable core being formed at its upper end with a push portion 12 through a collar portion 20.
  • numeral 13 designates a fixing member for fixing the solenoid 3 in position within the push control device 1, which has a passage hole 14 bored for access of the corresponding needle 2 thereto and a hole 15 bored for access thereto of the push portion 12 of the movable core 10 inserted in the solenoid 3, the holes crossing each other.
  • numeral 16 designates a voltage supply circuit for supply of voltage to the solenoids 3 ... which comprises wire rows 17 ... and pairs of wire columns 18, 19 arranged in a matrix fashion. Terminal pins 7 secured to the solenoids 3 are individually connected to the wire rows 17, and terminal pins 6 are each connected to one wire column 18, and terminal pins 8 each to the other wire column 19, through lead wires and diodes 25, 25.
  • any wire columns 18 ... to which suction coils 4 are connected at one end through terminal pins 6 ... are grounded through NPN type transistors 22, and then a voltage of + 24V is applied from a power supply unit 23 to wire rows 17 ... through PNP type transistors 21 ....
  • a magnetic field is formed across the suction coils 4, so that the movable cores 10 ... moves forward against the biasing force of a coil spring 11 and the collar portion 20 at the front end of each movable core 10 is sucked onto the permanent magnet 9.
  • application of the voltage is stopped.
  • the condition of the collar portion 20 of each movable core 10 being sucked onto the permanent magnet 9 is maintained at each solenoid 3, which fact enables the reduction of the electric capacity requirement.
  • the push control device 1 is moved by the shifting means in the direction of arrow A, whereupon while needles 2 ... are pushed by the projecting cores 10 ..., needles 2 ... corresponding to the movable cores 10... being sucked onto the permanent magnets 9 of solenoids 3 are allowed to enter the corresponding holes 14 without being pushed.
  • each solenoid 3 consists of two layers of a suction coil 4 and a release coil 5, and wire columns are formed in pairs. Therefore, when a voltage is applied to pairs of wire columns 18, 19, that is, a voltage of + 24V is applied to wire rows 17 ..., it is possible to move the movable cores 10 back and forth by selectively grounding the wire columns 18, 19 .... Thus, solenoids 3 can be satisfactorily excited to move the movable cores 10 ... back and forth without internal reflux current being produced across the wire columns 18 ....
  • wire columns 18, 19 ... only require application of a voltage of same potential or being grounded and, therefore, it is only necessary that one transistor be connected to the wire row 17, which fact provides an advantage of simplified circuit arrangement.
  • each wire column is comprised of two wires 18, 19, but alternatively each wire row 17 may be comprised of two wires. It is only required that either each wire row or wire column be comprised of two wires.
  • wire columns 18, 19 are grounded and wire rows 17 ... are subjected to application of a voltage of + 24V; but the wire columns 18, 19 should not necessarily be grounded. It is only required that different voltages be applied to the wire rows and columns to provide a voltage difference, no particular value being specified for the voltage to be applied.
  • the push control device of the invention is not limited to the use for lateral needle push control as in the above described embodiment; needless to say, it can be used for push control of any other type of weaving needles.
  • lateral needle 2 is pushed directly by movable core 10; but alternatively it is possible, for example, to arrange that, as Fig. 4 shows, the lateral needle 2 is pushed indirectly by the movable core 10, with a push rod 24 interposed between the needle and the core.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
  • Knitting Machines (AREA)
  • Electromagnets (AREA)
EP19890810550 1989-02-14 1989-07-20 Push control device for weaving needles in a jacquard machine Expired - Lifetime EP0382998B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP15852/89 1989-02-14
JP1585289U JPH0647020Y2 (ja) 1989-02-14 1989-02-14 ジャガード機の製織用針の押動制御装置

Publications (3)

Publication Number Publication Date
EP0382998A2 EP0382998A2 (en) 1990-08-22
EP0382998A3 EP0382998A3 (en) 1991-03-13
EP0382998B1 true EP0382998B1 (en) 1993-06-02

Family

ID=11900344

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890810550 Expired - Lifetime EP0382998B1 (en) 1989-02-14 1989-07-20 Push control device for weaving needles in a jacquard machine

Country Status (3)

Country Link
EP (1) EP0382998B1 (enrdf_load_stackoverflow)
JP (1) JPH0647020Y2 (enrdf_load_stackoverflow)
DE (1) DE68906878T2 (enrdf_load_stackoverflow)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0724032B1 (en) * 1995-01-25 1999-07-21 Kayaba Kogyo Kabushiki Kaisha Thread selecting device for weaving machine
GB2305444A (en) * 1995-09-26 1997-04-09 Brian Beech Heald control mechanism for a loom
FR2746422B1 (fr) * 1996-03-22 1998-06-12 Dentelles Darquer Sa Dispositif electromagnetique pour l'actionnement automatise des aiguilles d'une mecanique jacquard
GB9617451D0 (en) * 1996-08-22 1996-10-02 Bonas Machine Co Control mechanism
CN105019094B (zh) * 2014-04-15 2018-10-02 王铁钢 花枕选针电磁阀

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1163916A (fr) * 1955-10-28 1958-10-02 Grosse Webereimaschinen Gmbh Dispositif pour commander les lisses des métiers à tisser ou les outils de poinçonnage des machines pour piquer les cartons
DE2235225C3 (de) * 1972-07-18 1978-11-30 Grosse Webereimaschinen Gmbh, 7910 Neu-Ulm Vorrichtung zum Einlesen einer Anzahl von Einleseelementen von Jacquardbzw. Kartenschlagmaschinen
AT367923B (de) * 1979-09-27 1982-08-10 Saurer Ag Adolph Gleichstrom-haftmagnetvorrichtung

Also Published As

Publication number Publication date
JPH02106476U (enrdf_load_stackoverflow) 1990-08-23
EP0382998A2 (en) 1990-08-22
DE68906878T2 (de) 1993-09-09
DE68906878D1 (de) 1993-07-08
EP0382998A3 (en) 1991-03-13
JPH0647020Y2 (ja) 1994-11-30

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