EP0018320A1 - Dispositif d'insertion de trame pour métiers à tisser sans navette - Google Patents

Dispositif d'insertion de trame pour métiers à tisser sans navette Download PDF

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Publication number
EP0018320A1
EP0018320A1 EP80810099A EP80810099A EP0018320A1 EP 0018320 A1 EP0018320 A1 EP 0018320A1 EP 80810099 A EP80810099 A EP 80810099A EP 80810099 A EP80810099 A EP 80810099A EP 0018320 A1 EP0018320 A1 EP 0018320A1
Authority
EP
European Patent Office
Prior art keywords
receiving slot
weft
loom according
clamping device
clamping
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
EP80810099A
Other languages
German (de)
English (en)
Other versions
EP0018320B1 (fr
Inventor
Jakob Müller
Ferdinand Diesner
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.)
Textilma AG
Original Assignee
Textilma AG
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 Textilma AG filed Critical Textilma AG
Publication of EP0018320A1 publication Critical patent/EP0018320A1/fr
Application granted granted Critical
Publication of EP0018320B1 publication Critical patent/EP0018320B1/fr
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
    • D03D47/12—Looms in which bulk supply of weft does not pass through shed, e.g. shuttleless looms, gripper shuttle looms, dummy shuttle looms wherein single picks of weft thread are inserted, i.e. with shedding between each pick
    • D03D47/20—Constructional features of the thread-engaging device on the inserters
    • D03D47/23—Thread grippers

Definitions

  • the invention relates to a defenseless weaving machine according to the preamble of claim 1.
  • the weft insertion member has a relatively large cross-sectional dimension, so that the compartment has to be opened relatively wide in order to be able to carry out the weft insertion member. This leads to large, heavy and therefore slow drives, and thus to poor performance of the weaving machine.
  • the weft insertion member is otherwise very complicated. Long downtimes during maintenance and repair work mean that the entire weft insertion element has to be replaced.
  • the object of the invention is to design a defenseless weaving machine of the type mentioned at the outset in such a way that the weft insertion element is extraordinarily simple, easily replaceable and, moreover, small in order to make do with a small opening of the warp compartment.
  • the housing By arranging the clamping device and part of the receiving slot in a replaceable one Set body, which is inserted into a tubular housing of the weft insertion member, the housing still forming part of the slot, results in a maintenance and repair-friendly weft insertion member, since the insert body can be replaced extremely quickly and the weaving machine therefore has practically no downtimes in this regard. Since the insert body contains the clamping device and the housing is the supporting part, the clamping device and thus the insert body can be made very simple and small, so that the weft insertion member has only a small cross-sectional dimension and thus only requires a small opening of the chain compartment. In this way, the drive of the weaving machine can also be kept small, so that it has only low inertial forces and can run correspondingly faster, which leads to higher performance of the weaving machine.
  • the receiving slot of the weft insertion element can have a uniform width over its entire depth.
  • a particularly advantageous embodiment according to claim 2 since the wider input part enables a more secure detection of the weft yarn, while the * ensures an improved guidance and retention of the weft thread inwardly tapered portion.
  • a particularly simple embodiment of the clamping device is defined in claim 3.
  • the spring coils open to one side and allow a weft thread to engage.
  • the weft thread is guided to the side of the adjacent turns and clamped by the pull during the entry movement.
  • the coil spring can be arranged in the direction of the weft insertion member.
  • an embodiment according to claim 4 is more advantageous.
  • An embodiment of the clamping device according to claims 5 to 7 enables on the one hand a stronger clamping of the weft thread to be inserted in the insertion direction and nevertheless an easier release when the weft thread insertion member is moved in the opposite direction.
  • the cutting device can be designed according to claim 8, wherein the scissor-like design ensures a more secure cutting of the weft thread.
  • the scissor arms can be biased into a partially open position of the scissors by means of spring force, whereby an increase in the tension of the weft thread as the weft thread insertion element progresses can further actuate the scissors against the spring force of the pretensioning and cuts the weft thread.
  • a simpler design of the cutting device describes claim 9.
  • an increase in the tension of the weft thread causes it to be cut at the knife edge.
  • a particularly simple embodiment of the cutting device describes claim 10.
  • the knife edge cannot be replaced with the insert body, but the edge of the housing slot serving as knife edge must be reground.
  • FIG. 1 shows in the diagram the production of a fabric 2, for example a tape fabric, from warp threads 4 that are open to a compartment 6 and a weft thread 8, which is entered in the chain compartment 6.
  • the weft thread 8 is drawn off from a yarn spool 12 by means of the weft thread insertion element 10 and inserted into the warp compartment 6 from the fabric side edge 14 and struck with the reed 18.
  • the weft thread insertion member 10 has a receiving slot 20 which points counter to the insertion direction and is used for receiving and carrying the weft thread 8.
  • the weft insertion element 10 contains a tubular housing 22, at the end of which an insert body 24 is inserted.
  • the receiving slot 20 consists of an insert body slot 26 in the insert body 24 and a housing slot 28 of the housing 22.
  • the insert body slot 26 and the housing slot 28 essentially correspond to one another and interact.
  • the insert body 24 has a cutting device 30 for the weft thread 8.
  • the weft insertion member contains a clamping device 32 for receiving and holding the weft thread 8 to be inserted.
  • the insert body 24 is tapered at its tip.
  • the clamping device 32 contains a helical spring 36 arranged at the base 34 of the receiving slot 20, which is arranged in an opening 38 in the insert body 24.
  • This arrangement is such that the helical spring is arranged coaxially with an axis 40 which is bent transversely to the receiving slot 20 and against it.
  • the turns 42 of the helical spring 36 open against the receiving slot 20 and permit the engagement of a weft thread 8. Since the turns 42 taper on the side facing away from the receiving slot 20, they can clamp a weft thread in this direction, as shown in FIG. 3 emerges.
  • the cutting device 30 consists of a knife edge 44, which in the present case is arranged on the insert body 2h on the side of the weft insertion element 10 facing away from the reed 18.
  • the knife edge protrudes into the receiving slot 20 of the weft insertion element 10.
  • Screws 46 (not shown in more detail) enable the knife edge to be replaced.
  • the knife edge can also be arranged on the outside of the housing. It is also possible to sharpen the housing slot 28 and use it as a knife edge.
  • FIG. 5 shows a further exemplary embodiment of an insert body 48 with a modified clamping device 50.
  • the latter has a chamber 54 which adjoins the base of the receiving slot 52 and in which a clamping body 56 is arranged, which is biased against the receiving slot 52 by means of a spring 58.
  • the clamping body 56 is designed as a rotating body, preferably as a ball.
  • a lint discharge channel 62, 64 opens into the chamber 60 for receiving the spring 58 and into the chamber 54 of the clamping body 56, in order to be able to remove the lint that is produced during weaving.
  • a weft thread passes through the receiving slot 52 into the chamber 54 and displaces the clamping body 56 with increasing tension, whereby it sticks in the gap between the clamping body 56 and the chamber wall. The stronger the pull of the weft thread, the tighter it jams in the clamping device. In the opposite direction of movement of the weft insertion element, the weft is released from the clamping body 56.
  • Fig. 6 shows a further embodiment of an insert body 66, which is designed analogously to that of FIG. 5, but now the clamping device 68 has a slightly larger chamber 70, in which two clamping bodies 72 are arranged, which by means of a spring 74 against the Receiving slot 76 are biased.
  • the clamping bodies 72 expediently again consist of rotating bodies, for example cylinders or balls, the weft thread to be inserted being able to clamp between the clamping bodies 72.
  • the clamping bodies 72 roll against each other both when clamping and when later loosening.
  • the function of the defenseless weaving machine is as follows.
  • the weft insertion element 10 reaches from the left side of the fabric in FIG. 1 through the open chain compartment 6 and detects the weft 8 on the right side of the fabric 14 by snapping it into the receiving slot 20.
  • the weft insertion element is then moved to the left, on the one hand pulling the weft 8 from the yarn spool 12 and on the other hand pulling the already woven-in weft.
  • a weft thread loop is first formed and pressed into the clamping device 32 by the increasing tension of the weft thread. As soon as the part of the weft thread facing the fabric has reached a certain tension with the progressive movement of the weft thread insertion member 10, the weft thread is cut off on the side facing away from the reed 18 by means of the cutting device 30.
  • the separated leg of the weft loop remains in the chain compartment.
  • the other leg of the weft thread 8 remains in the clamping device 32 of the weft insertion element 10 is clamped and is pulled through the chain compartment 6 onto the left side of the fabric by means of the weft insertion element 10.
  • the chain compartment 6 now changes and the reed 18 beats the inserted weft 8.
  • the weft insertion element then moves from left to right again and enters the remaining part of the previous weft thread in the new chain compartment. As a result, the remaining part is stretched and the thread tension thus achieved pulls the remaining part of the weft thread out of the clamping device 32, so that it comes to rest in the warp compartment.
  • the weft insertion element 10 continues to move to the right side and can grasp a new weft 8, whereupon the insertion process described above is repeated.
  • the weft insertion member can be a weft rod, but it is also possible to design the weft insertion member as a flexible band or as a missile, the active end of which is designed in the manner according to the invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Looms (AREA)
EP80810099A 1979-03-29 1980-03-24 Dispositif d'insertion de trame pour métiers à tisser sans navette Expired EP0018320B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2947/79 1979-03-29
CH294779A CH634614A5 (de) 1979-03-29 1979-03-29 Schuetzenlose webmaschine.

Publications (2)

Publication Number Publication Date
EP0018320A1 true EP0018320A1 (fr) 1980-10-29
EP0018320B1 EP0018320B1 (fr) 1983-02-16

Family

ID=4245212

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80810099A Expired EP0018320B1 (fr) 1979-03-29 1980-03-24 Dispositif d'insertion de trame pour métiers à tisser sans navette

Country Status (6)

Country Link
US (1) US4350184A (fr)
EP (1) EP0018320B1 (fr)
CH (1) CH634614A5 (fr)
CS (1) CS226012B2 (fr)
DE (1) DE2925694C2 (fr)
ES (1) ES8101665A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE20105091U1 (de) * 2001-03-23 2002-09-05 Wangner Finckh GmbH & Co. KG, 72760 Reutlingen Spannzange für Nahtwebmaschinen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB187084A (en) * 1921-08-26 1922-10-19 Brintons Ltd Improvements in needle looms for weaving carpets or the like
FR1122422A (fr) * 1955-02-24 1956-09-06 Perfectionnements apportés aux dispositifs passe-trame des métiers à tisser
FR1425542A (fr) * 1964-12-10 1966-01-24 Métier à tisser sans navettes
FR1456409A (fr) * 1964-12-09 1966-10-21 Dispositif à pince de pression pour l'insertion de fils de trame dans les métiers à tisser
US3578031A (en) * 1968-09-27 1971-05-11 Firm Of Jean Gusken The Hook-shaped gripper point

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2072161A (en) * 1933-06-02 1937-03-02 Dewas Raymond Thread carrying apparatus for weaving looms and the like
DE659180C (de) * 1934-06-02 1938-04-27 Dewas Raymond Schussfadeneintragvorrichtung
CH508075A (de) * 1970-06-04 1971-05-31 Saurer Ag Adolph Garnhalteeinrichtung an einem Schussfadeneintragsorgan einer Webmaschine
JPS5336498B2 (fr) * 1971-08-20 1978-10-03

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB187084A (en) * 1921-08-26 1922-10-19 Brintons Ltd Improvements in needle looms for weaving carpets or the like
FR1122422A (fr) * 1955-02-24 1956-09-06 Perfectionnements apportés aux dispositifs passe-trame des métiers à tisser
FR1456409A (fr) * 1964-12-09 1966-10-21 Dispositif à pince de pression pour l'insertion de fils de trame dans les métiers à tisser
FR1425542A (fr) * 1964-12-10 1966-01-24 Métier à tisser sans navettes
US3578031A (en) * 1968-09-27 1971-05-11 Firm Of Jean Gusken The Hook-shaped gripper point

Also Published As

Publication number Publication date
CS226012B2 (en) 1984-03-19
US4350184A (en) 1982-09-21
CH634614A5 (de) 1983-02-15
ES490077A0 (es) 1980-12-16
DE2925694A1 (de) 1980-10-02
ES8101665A1 (es) 1980-12-16
DE2925694C2 (de) 1983-04-28
EP0018320B1 (fr) 1983-02-16

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