WO2015010879A1

WO2015010879A1 - Weaving machine having a device for forming a leno selvedge

Info

Publication number: WO2015010879A1
Application number: PCT/EP2014/064396
Authority: WO
Inventors: Peter Czura; Gerhard BÖGL; Harald Arnold
Original assignee: Lindauer Dornier Gesellschaft Mit Beschränkter Haftung
Priority date: 2013-07-25
Filing date: 2014-07-07
Publication date: 2015-01-29
Also published as: CN105408537A; RU2016105515A; DE102013214598A1; JP2016527416A; RU2636308C2; EP3024967A1; KR20160029828A; KR101857891B1; JP6313853B2

Abstract

The invention relates to a weaving machine having a device for forming a leno selvedge (1), comprising a first guiding apparatus (12.1), which is designed as a linear guide, for guiding a first leno needle (11.1) and comprising a first needle drive (13.1). The device also comprises a second guiding apparatus (12.2), which is designed as a linear guide, for guiding a second leno needle (11.2) and comprises a second needle drive (13.2). The two guiding apparatuses (12.1, 12.2) and the two needle drives (13.1, 13.2) are fastened to a carrier (14) that can be driven in a longitudinal direction of the leno needles (11). The leno needles (11) can be driven in two planes (15.1, 15.2) that are parallel to each other by means of the carrier (14) and by means of the needle drives (13). The two planes (15.1, 15.2) extend in a weft direction (5) of the weaving machine and in the longitudinal direction of the leno needles (11). In addition, a thread-guiding element (16) is present, which has two guiding contours (17.1, 17.2) that extend parallel to the longitudinal direction of the leno needles (11). The thread-guiding element (16) is arranged in a region between the shedding elements (8) and the two planes (15.1, 15.2) of the leno needles (11).

Description

Weaving machine with a device for forming a leno selvedge

Technical area

The present invention relates to a weaving machine with a device for forming a leno selvedge

State of the art

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. By means of a leno selvedge, 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.

In DE 1814269, 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. By the drive devices of the rotary needles different types of leno bindings can be generated.

Frequently, several 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

Herbewegung the respective rotary needles in the weft direction needed.

Such mechanisms are complex and difficult and have therefore not proven in practice.

From 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. However, 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

The object is achieved by a weaving machine with a device for forming a leno selvedge according to the independent claim. At the loom according to the invention, 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. In addition, on the device a second

Guide means for guiding a second rotary needle present and a second needle drive for driving the second 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

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.

Furthermore, a thread guide element is present on the device. 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. With the help of a loom

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.

By the arrangement according to the invention, it is possible, 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. By driving the carrier in the longitudinal direction of the rotary needles - usually vertical - both rotary needles or both leno threads are alternately placed above or below the plane in which the weft threads are entered. In this case, 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.

By the described movement of the ground thread and the respectively registered weft thread can be wrapped simultaneously by both leno threads. This results in a particularly strong binding of the leno selvedge.

Furthermore, there are advantages in that the thread guide element is arranged in a region between the rotary needles and the healds of a shed forming element of the loom. Thus, a formation of the alley between warp threads and ground thread is achieved without any risk of collision between a reed of the loom and the thread guide element.

In order to achieve that the rotary needles pass between the ground yarn and the warp thread in a region in which the existing lane is widest, it is advantageous if 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.

It is advantageous if the first and the second needle drive each as

Linear actuators are formed. The needle drives can be pneumatic, electromotive or electromagnetic linear drives.

For example, an arrangement is advantageous in the case of the first and second

Guide means and first and second needle drives are mounted on the front of a shaft frame. In this way, 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. In the event that a leno edge is desired, in which the leno threads are to be at successive weft entries always above or always below the weft threads, 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.

With a corresponding programming of the needle drives for the rotary needles and the drive for the carrier of the leno device, different variants of leno bindings can be produced in the fabric edge. Optionally, several embodiments of the weaving machine according to the invention result from the different mounting possibilities of the weaving machine

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.

In this case, 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.

In further advantageous embodiments, the thread guide element is attached to a shed element of the loom or to a fixed component of the loom.

When attached to a compartmentalized picture element, a movement takes place perpendicular to the warp and weft threads in the longitudinal direction of the thread guide element together with this.

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.

So that when changing subjects no threads at a free end of the

Thread guide stuck or wrong with the

Cross the thread guide element.

As a rule, 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

Guide device to attach. 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. In the area of the right or the left fabric edge, the leno weave of one each A pair of rotary needles formed, wherein the one rotary needle of this pair belongs to the group of first rotary needles, while the other rotary needle of the pair belongs to the group of second rotary needles. 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.

It is also conceivable, of course, every standing thread on each side by one

To let thread guide element lead. In this case, 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.

For the formation of leno edges at the middle separation point of a two-lane tissue, it is useful to the groups of first and second rotary needles for the outer two edges also add rotary needles for the two fabric edges in the middle.

This results in one group of first and one group of second

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.

In the middle, in the case of the two-lane tissue, at least three

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.

Accordingly, 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. In multi-web fabrics with multiple separation points between the individual fabric webs, 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. As already explained in the case of two-web fabrics, in the case of fabrics with more than two webs, in each case two pairs of first and second rotary needle are assigned a group of three thread guide elements.

In another, particularly advantageous for multi-lane tissue

Embodiment of the invention, 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 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

Shedding elements must be pulled forward.

The formation of leno edges on a weaving machine according to the invention with a leno device as described above has particular advantages in weaving multi-web fabrics at high speed. Those used in the prior art

Turner strands are namely elements that can no longer be used economically at higher engine speeds due to heavy wear. Incidentally, in the case of leno devices with motor drives for the formation of leno edges, a separate drive is required for each fabric edge; That increases the costs. For higher engine speeds are motorized

Used leno devices in which the leno threads are passed through the eyelets of a leno disc. However, such 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.

Brief Description of the Drawings Figure 1 Schematic, not to scale representation of a

Embodiment of the weaving machine according to the invention in a partial view from above

Figure 2 Schematic, not to scale sectional view of

Embodiment according to Figure 1 with a view in the weft direction

Figure 3 Schematic, not to scale representation of another

Embodiment of the weaving machine according to the invention, front view according to section A-A (see FIG.

Figure 4 Schematic, not to scale representation of

Embodiment of the weaving machine according to the invention according to Figure 3 in a partial view from above. Advantageous embodiments of the invention

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.

In the present embodiment, 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

Standing thread 7 formed. 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

Weaving machine to the warp threads 2 and to the ground thread 7 point.

At the guide contours 17 of the ground wire 7 and the adjacent warp thread 2 are guided so that a distance is maintained between the two, even if the warp thread 2 and / or the ground wire 7 for shedding in the longitudinal direction of the rotary needles 1 1 are moved. 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. Also, the ground thread 7 is subtracted from a thread supply, not shown, behind the loom. In the illustrated embodiment, 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. On the drive rails in each case the needle holder for individual rotary needles 1 1 or for groups of rotary needles 1 1 are attached. The

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.

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.

To form the leno selvedge 1, 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.

Figure 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. However, 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. reference numeral

1 leno selector

2 warp thread

3 warp direction

4 weft

5 weft direction

6.1, 6.2 first leno thread, second leno thread

7 standing thread

8 shed elements

9 compartment imaging machine

10 reed

1 1, 1 1.1, rotary needles, first rotary needle, second rotary needle 1 1.2

12, 12.1, guide means, first guide means, second 12.2 guide means

13, 13.1, needle drive, first needle drive, second needle drive 13.2

14 carriers

15.1, 15.2 levels of rotary needles

16 thread guide element

17, 17.1, guide contours

17.2

18 thread store for leno threads

Claims

claims

1 . Weaving machine with shedding elements (8) and with a device for forming a leno selvedge (1), the device having a first guide device (12.1) for guiding a first turning needle (1.1.1) and a first

Needle drive (13.1) for driving the first rotary needle (1 1 .1) and a second guide means (12.2) for guiding a second rotary needle (1 1 .2) and a second needle drive (13.2) for driving the second rotary needle (1 1 .2 ), wherein the guide means (12) and the needle drives (13) on a support (14) are driven by a drive in a longitudinal direction of the rotary needles (1 1), further comprising a thread guide element (16) that two parallel to the longitudinal direction of the rotary needles (1 1) extending guide contours (17.1, 17.2), which on two opposite sides of the

Thread guide element (16) are arranged, characterized in that the guide means (12) are each formed as linear guides such that the rotary needles (1 1) in a weft direction (5) of the loom are driven and that the two guide means (12.1, 12.2) and the two needle drives (13.1, 13.2) are fastened to the carrier (14) in such a way that the first rotary needle (1.1.1) can be driven in a first plane (15.1) and that the second rotary needle (11.2) in a second Level (15.2) is driven, these two levels (15.1, 15.2) are parallel to each other and that the

Thread guide element (16) in a region between the shedding elements (8) and the two planes (15.1, 15.2) of the rotary needles (1 1) is arranged.

2. The loom according to claim 1, wherein the thread guide member (16) is fixed to the carrier (14).

3. The weaving machine according to claim 1, wherein the thread guide element (16) is attached to one of the shed forming elements (8) of the loom.

4. loom according to claim 1, wherein the thread guide element (16) is fixed to a fixed component of the loom.

5. The weaving machine according to one of claims 1 to 4, wherein the first guide device (12.1) a group of first rotary needles (1 1 .1) is attached and in which at the second guide means (12.2) a group of second rotary needles ( 1 1.2) is fastened, wherein the groups of first and second rotary needles (1 1.1, 1 1 .2) in each case by the first and second needle drives (13.1, 13.2) are drivable.

6. The loom according to claim 5, wherein a plurality of thread guide elements (16) are provided, wherein the thread guide elements (16) and the rotary needles (1 1) are arranged such that in each case a pair of first and second rotary needle (1 1 .1, 1 1 .2) is assigned a group of two thread guide elements (16).

7. The weaving machine according to claim 5, wherein a plurality of thread guide elements (16) are present, wherein the thread guide elements (16) and the rotary needles

(1 1) are arranged such that in each case two pairs of first and second rotary needle (1 1 .1, 1 1 .2) is assigned a group of three thread guide elements (16).

8. The weaving machine according to claim 5, in which thread stores (18) are present for leno threads (6), wherein the thread stores (18) for leno threads (6) are arranged above a weft insertion area of the weaving machine.