Classifications

• • D—TEXTILES; PAPER
  • D03—WEAVING
  • D03C—SHEDDING MECHANISMS; PATTERN CARDS OR CHAINS; PUNCHING OF CARDS; DESIGNING PATTERNS
  • D03C7/00—Leno or similar shedding mechanisms
  • D03C7/06—Mechanisms having eyed needles for moving warp threads from side to side of other warp threads
• • 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
  • D03D47/40—Forming selvedges

Definitions

• the present invention relates to a weaving machine with a device for forming a leno selvedge
• a weaving machine with a device for forming a leno selvedge is known, for example, from DE 1814269.
• the leno selvedge is formed by leno threads and ground threads.
• a fabric edge is fixed so far that warp threads in the edge region of the fabric can no longer be released from the fabric in the weft direction.
• the leno threads are moved back and forth with respect to the ground threads by means of electromagnetic drive devices via gear elements and fork-shaped rotary needle pairs.
• the leno threads are moved in the weft direction.
• the drive devices of the rotary needles different types of leno bindings can be generated.
• leno edges are needed on the loom. These can be arranged on the right and left on the respective fabric or, in the case of multi-web fabrics, also in the middle between fabric webs. According to DE 1814269 a separate drive device for the back and forth for each such leno selvedge
• WO 201 1095262 A1 a device is known in which a plurality of needles, the effect threads lead can be driven by a common drive in the weft direction.
• WO 201 1095262 A1 does not disclose the formation of leno edges on the fabric edge or between multiple fabric webs.
• Object of the present invention is to provide a loom with a simply constructed device for forming one or more leno edges. Description of the invention
• a weaving machine with a device for forming a leno selvedge according to the independent claim.
• a device for forming a leno selvedge is provided, which has a first guide device for guiding a first rotary needle, and a first needle drive for driving the first rotary needle.
• a second guide device for guiding a first rotary needle
• a first needle drive for driving the first rotary needle.
• a second needle drive for driving the first rotary needle.
• the rotary needles are usually elongated, thin elements with a thread eyelet through which the associated leno thread is guided.
• the guide means and the needle drives are fixed to a carrier which is driven by a drive
• the longitudinal direction of the rotary needles is driven.
• the longitudinal direction of the rotary needles is usually perpendicular to warp and weft threads in the loom; in most weaving machines, this is essentially in the vertical direction.
• the thread guide element is an elongated element whose longitudinal axis generally points in the same direction as the longitudinal axis of the rotary needles.
• the thread guide element has two longitudinally extending guide contours. The two guide contours are arranged on two opposite sides of the thread guide element. These are usually the two sides or boundary surfaces of the thread guide element, which point in the weaving machine to the warp threads.
• the weaving machine further comprises shed forming elements with which a shed can be formed.
• Shedding elements on the weaving machine are, for example, healds or harness cords.
• attached shedding machine can be heddles or Harnischkordeln move with the associated healds between top and bottom position. By warp threads that are guided in the heddles, the shed is formed in this professional movement.
• the loom with the device for forming a leno selvedge according to the present invention is characterized in that the first and the second guide means are designed as linear guides such that the Rotary needles in a weft direction of the weaving machine can be guided or driven. Furthermore, both guide devices and the two needle drives are secured to the carrier in such a way that the first rotary needle can be driven in a first plane and that the second rotary needle can be driven in a second plane, these two planes running parallel to one another.
• the distance between the two levels can be, for example, by
• Spacers can be achieved in the region of the guide means, which are suitably mounted on the carrier.
• the thread guide element according to the invention is arranged in an area between the shed forming elements of the loom and the two planes in which the rotary needles are driven.
• the first and the second rotary needle with the respective first and second leno thread in the weft direction opposite to each other alternately to bring the right and the left side of a warp thread running in the warp direction.
• both rotary needles or both leno threads are alternately placed above or below the plane in which the weft threads are entered.
• an alley for the passage of the respective rotary needle between the stationary thread and the adjacent warp thread is formed by the thread guiding element.
• the thread guide element is arranged in a region between the rotary needles and the healds of a shed forming element of the loom.
• the passage point is close to the thread guide element. For this it may be useful to turn the rotary needles in the direction of the Thread guide element - that is in the warp direction to the rear - to bend or to arrange starting from the guide means obliquely.
• the first and second rotary needle can be driven by the respectively associated first and second needle drive independently of the respective other rotary needle in the weft direction of the weaving machine.
• Linear actuators are formed.
• the needle drives can be pneumatic, electromotive or electromagnetic linear drives.
• first and second needle drives are mounted on the front of a shaft frame.
• standard elements - namely commercial shaft frame with the associated shaft guides can be used as a carrier for the leno device.
• a technically advantageous solution is the drive of the carrier or the shaft frame by the shedding machine of the loom. Because of the typical motion sequences of the shedding machines, this usually leads to the leno threads being alternately above and below the weft thread in successive weft insertion.
• the carrier can also be driven by a drive between two weft entries a complete downward and upward movement of the wearer causes. This may be, for example, a drive derived from the reed drive of the loom.
• Thread guiding element A first simple construction results when the yarn guide element is fastened to the same drivable support as the guide devices for the rotary needles.
• the yarn guide member is driven synchronously with the rotary needles in its longitudinal direction and in the longitudinal direction of the rotary needles. So that during this movement the thread guide element in the area of the warp threads and the ground thread always keeps its alley-forming function, the thread guide element with its guide contours must be made sufficiently long so that no crossing of the thread guide element with the ground thread or with adjacent warp threads can take place. For example, it may be expedient if the guide contours of the thread guide element extend over a length which corresponds approximately to the distance between the upper shed position and the lower shed position on the loom.
• the thread guide element is attached to a shed element of the loom or to a fixed component of the loom.
• the thread guide element When attached to a fixed component of the loom-for example, a crossbeam of the machine frame - the thread guide element must also have a length which corresponds approximately to the distance between the upper shed position and the lower shed position on the loom.
• a fabric is bounded on both sides by a leno selvedge. Therefore, it is useful to have a first group of two first rotary needles and a second group of two second rotary needles at the first and second, respectively
• the two belonging to a group of rotary needles are arranged in this case in the weft direction at a distance from each other, which corresponds approximately to the fabric width in the reed.
• Each of these pairs of first and second rotary needle is associated with at least one thread guide element, which provides on one side of the ground thread for the alley between the ground thread and the respective adjacent warp thread.
• each pair of first and second rotary needle associated with a pair of two thread guide elements This leads to a greater process reliability, since a lateral deflection of the ground thread is prevented.
• Rotary needles each consisting of four needles. All four needles of a group are connected to the same guide device which is driven by a needle drive. For each of the four fabric edges in each case a pair of first and second rotary needle is used to form each of two leno threads and a stationary thread a leno selvedge.
• Thread guide elements used. Depending on a thread guide element for the two streets between the two ground threads and the respective adjacent warp thread and another thread guide element to form an alley between the two middle Steherfäden.
• a further embodiment of the loom according to the invention provides that groups of first and second rotary needles are present and a plurality of thread guide elements, wherein the thread guide elements and the rotary needles are arranged such that two pairs of first and second rotary needle is associated with a group of three thread guide elements.
• the number of first and second rotary needles in each of the two groups of needles is correspondingly increased to the extent that at each outer and middle edge of the fabric in each case a pair of first and second rotary needle is present.
• two pairs of first and second rotary needle are assigned a group of three thread guide elements.
• the leno threads are deducted from the thread bobbins of a thread store, which is located above the weft insertion zone of the loom. This allows easier accessibility to the thread bobbins of a thread store, which is located above the weft insertion zone of the loom. This allows easier accessibility to the thread bobbins of a thread store, which is located above the weft insertion zone of the loom. This allows easier accessibility to the thread bobbins of a thread store, which is located above the weft insertion zone of the loom. This allows easier accessibility to the
• Thread bobbins of the thread store for the leno threads from the front of the loom This results in advantages for the operator, as in a thread break no leno threads from the area behind the thread
• Shedding elements must be pulled forward.
• Turner strands are namely elements that can no longer be used economically at higher engine speeds due to heavy wear.
• a separate drive is required for each fabric edge; That increases the costs.
• For higher engine speeds are motorized
• leno devices used leno devices in which the leno threads are passed through the eyelets of a leno disc.
• leno discs cause an undesirably wide lane between the middle leno edges of a multi-lane tissue.
• the present invention allows the weaving of multi-web fabrics with
• Lathe edges with only two needle drives In addition, very narrow lanes can be realized at the middle separation points between the fabric webs.
• the lane width is only dependent on the thickness of the rotary needles and the thread determined guide elements. In this way, multi-lane fabrics with leno edges can be produced in a particularly cost-effective and high-speed manner.
• Embodiment of the weaving machine according to the invention front view according to section A-A (see FIG.
• Figure 1 shows a partial view of a loom according to the invention with warp threads 2, which extend on the loom in the warp direction 3, and with weft threads 4, which extend in the weft direction 5.
• the compartment picture elements 8 are frame-like healds with healds, through which the warp threads 2 are guided or moved in a known manner.
• the leno selvedge 1 is using the two leno threads 6.1, 6.2 and a
• the ground thread 7 runs at the edge of the fabric parallel to the warp threads 2. He may or may not be involved in the shedding.
• the first leno thread 6.1 is guided by a first rotary needle 11 .1 in the first plane 15.1.
• the second leno thread 6.2 is replaced by a second
• Rotary needle 1 1.2 out in the second level 15.2.
• the two planes 15.1, 15.2 of the rotary needles 1 1.1, 1 1 .2 run parallel to each other in the weft direction 5 and in the longitudinal direction of the rotary needles 1 1.
• Each of the two rotary needles 1 1 .1, 1 1.2 can be positioned alternately right and left of the ground wire 7. It is a
• Thread guide element 16 is present, which has on two opposite sides guide contours 17.1, 17.2, which extend parallel to each other in the longitudinal direction of the rotary needles 1 1.
• the guide contours 17 form on
• Thread guide element 16 contact surfaces or lines of contact in the
• the cross section of the thread guide element is chosen so large that between the ground wire 7 and warp 2, an alley is formed, in which the rotary needles 1 1 can dive without hanging on one of the two adjacent threads.
• the leno threads 6 and the associated ground wire 7 are pulled together by a Rietlücke the reed 10 on the loom.
• FIG. 2 shows the loom according to FIG. 1 in a partial view looking in the weft direction 5.
• the warp threads 2 are of a not shown
• Kettbaum subtracted behind the loom.
• the ground thread 7 is subtracted from a thread supply, not shown, behind the loom.
• the leno threads 6 are withdrawn from the thread bobbins of a thread store 18, which is located above the weft insertion zone of the loom.
• the first rotary needle 1 1 .1 is attached to a first guide device 12.1 and the second rotary needle 1 1.2 is attached to a second guide device 12.2.
• the two rotary needles 1 1.1, 1 1 .2 are bent in the present example in the warp direction 3 backwards to the thread guide element 16 out.
• the guide means 12 consist in the present example of guide rails which are bolted to the shaft frame. On the guide rails slide 5 more spacers in the weft direction, through which the distance between the two planes 15.1, 15.2 of the rotary needles 1 1.1, 1 1 .2 is determined.
• Drive rails are fastened to the spacer elements, each of which having its outer end with a needle drive (13) designed as a linear motor drive. are connected.
• the needle holder for individual rotary needles 1 1 or for groups of rotary needles 1 1 are attached.
• Guide rails extend in the weft direction 5 on the front side of a carrier 14, which is driven by the shed forming machine 9, through which the drive of the shed elements 8 takes place on the loom.
• FIG. 3 shows the arrangement of the needle drives 13.1, 13.2 on the shaft frame of the loom.
• Both needle drives 13.1, 13.2 are fastened together with the associated guide devices 12.1, 12.2 on the front side of the shaft frame or of the carrier 14 and are driven by the shedding machine 9 in the longitudinal direction of the rotary needles 11.
• Each of the two needle drives 13.1, 13.2 can be driven by an electronic control device, not shown, independently of the respective other needle drive 13.
• each of the two rotary needles 1 1.1, 1 1 .2 is alternately brought to the right or to the left side of the ground thread 7. Then, a drive of the carrier 14 in the longitudinal direction of the rotary needles 1 1, that is perpendicular to warp threads 2, ground thread 7 and weft threads 4. In the two end positions of the carrier 14 can each be a weft insertion, so when changing again the position of the rotary needles 1 1 the leno threads 6 alternately above and below the weft threads 4 and come to rest alternately right and left of the associated ground thread 7. As a result, a dreifädige leno selvedge 1 is formed.
• FIG. 3 shows the arrangement of the guide means 12 and the needle drives 13 on the carrier 14, which is the same for all embodiments described herein.
• FIG. 3 also shows details of a further embodiment of the weaving machine according to the invention. This is an embodiment in which a plurality of groups of first and second rotary needles 1 1.1, 1 1 .2 are each assigned to a group of thread guide elements 16.
• FIG. 4 shows further details of this embodiment for multi-web fabrics. In each case, two pairs of first and second rotary needle 1 1.1, 11.2 are assigned a group of three thread guiding elements 16.
• the two outer thread guide elements 16 form an alley between the respective stationary thread 7 and the adjacent warp thread 2 of the fabric web.
• the middle thread guide element 16 forms an alley between the two ground threads of the adjacent fabric webs.

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

Priority Applications (5)

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Publications (1)

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Citations (7)

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• 2013
  • 2013-07-25 DE DE102013214598.5A patent/DE102013214598A1/de not_active Ceased
• 2014
  • 2014-07-07 EP EP14737208.0A patent/EP3024967A1/de not_active Withdrawn
  • 2014-07-07 RU RU2016105515A patent/RU2636308C2/ru not_active IP Right Cessation
  • 2014-07-07 JP JP2016528394A patent/JP6313853B2/ja active Active
  • 2014-07-07 WO PCT/EP2014/064396 patent/WO2015010879A1/de active Application Filing
  • 2014-07-07 CN CN201480042039.8A patent/CN105408537A/zh active Pending
  • 2014-07-07 KR KR1020167002977A patent/KR101857891B1/ko active IP Right Grant

Patent Citations (7)

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