KR20080057249A - Loom with pneumatic weft insert - Google Patents

Abstract

The weaving machine includes a pneumatic insert. The insert is fitted into the weave body 12, and the guide mechanism 42 is interlocked with the weft guide passage 40. The guide passage 10 comprising the woven body 12 is rotatable in the insertion position and in the stop position for the weft 10. A fixed weft insert 8 comprising at least two blowing nozzles is interlockable with the guide passage 40 in the insertion position. A fixed shear 46 is used to cut the weft 10. The blow nozzle 22 is rotatably mounted in the transverse direction opposite the shear 46 to improve the weaving machine, and to the motor drive 28 to position the blow nozzle opposite the shear 46. Is connected by.

Description

Weaving machine with pneumatic weft inserts {WEAVING MACHINE COMPRISING PNEUMATIC WEFT INSERTION}

The present invention relates to a loom with a pneumatic weft insert according to the preamble of claim 1.

Looms with pneumatic weft inserts of the type described above are known, for example, from WO 97/13901. The loom includes a body provided with a guide mechanism having a guide passage for the weft yarn. The guide passage is rotatable with the body between the insertion position and the beating-up position of the weft. In addition, the guide passage is provided in a fixed weft inserting device having a blowing nozzle in the insertion position, which is independent of the body, while not affecting the movement of the body, nor is it affected by the movement of the body. Shearers are provided for cutting the inserted wefts. The blowing nozzle is rotatably arranged in the vertical direction and is driven by the jacquard and the return spring. When using a jacquard machine, in each case where two blowing nozzles are located in pairs in the guide passage, only one blowing nozzle is used. Since the shear cuts the inserted weft at the insertion point of the blow nozzle, the inserted weft must be supported by the clamping device as far as the beating-up edge. The clamping device is provided on the body and moves with the body. The clamping device, however, is relatively complex and likely to malfunction. In addition, the height adjustment of the blowing nozzle by the jacquard machine is also relatively complicated and there is a limitation in flexibility and accuracy.

WO 00/63464 A1 discloses a weaving machine with a pneumatic weft insert, in which a plurality of blowing nozzles of the weft insert are rotatably provided in a vertical direction by a drive device for selectively aligning the weft insert with a guide passage. The advantage of this weaving machine is that the weft insertion device of the body and the actuator for the nozzle are fixedly arranged. This configuration not only creates a complex drive but also increases the force exerted by the body's back and forth movement with the weft insertion device, which reduces the frequency of beat-ups. Acceleration and deceleration forces associated with motion also adversely affect the stability of the weft insertion device. To cut the inserted weft, the entire weft of the insertion device moves up with respect to the cutting device together with the body. It is not possible to rotate the blowing nozzle across the vertical direction.

DE 30 14 776 A1 discloses a weaving machine with a pneumatic weft insert in which a plurality of blowing nozzles of the weft inserting device are arranged to be rotatable in the vertical and horizontal directions, in order to have a blowing nozzle selectable as a guide passage on the body. The weft insertion device is disposed on the body, having the advantages as described above. Regarding the actual drive of the blow nozzle, there was no detailed description as well as interaction with any cutting device.

It is an object of the present invention to improve a weaving machine comprising a pneumatic weft insert of the type described above. In this case, on the one hand, the clamping solution is unnecessary, as in WO 97/13901, and on the other hand, the disadvantages of the overload of the movable body as in WO 00/63464 are not taken into account.

The above object is achieved by the features of claim 1. In order to move the selected blow nozzle precisely toward the shear, the inserted weft thread is actually cut only when it enters the shear, since the blow nozzle is mounted so as to be transversely rotatable towards the shear and connected to a particular motor drive. Thus, since it is possible to move the cutting of the inserted weft into the beating-up area of the weft, the clamping device is no longer needed. This not only simplifies the structure of the loom but also increases the weft insertion accuracy.

The advantages of the loom are described in detail in claims 2 to 9.

As with the advantages described in claim 2, the cutting of the inserted weft is carried out in the region of the biting-up edge of the cloth. In this case, even after cutting, the weft is reliably and securely positioned so that the positional movement of the weft is no longer possible.

As described in claim 3, the accuracy and operational reliability of the loom are improved when the drive device is designed such that the blow nozzles used in each case are located at least about the same axis relative to the guide passage in the transverse direction.

In particular, when using blowing nozzles arranged on top of each other in the vertical direction, as with the advantages described in claim 4, the blowing nozzles can be rotatably mounted and also driven in the vertical direction across the transverse direction. This driver is implemented in a manner known by the jacquard. However, as with the advantages described in claim 5, in order to align at least approximately one of the blow nozzles with the guide passage in the vertical direction, the blow nozzles are connected to separate motor drive devices for the vertical direction. As in the advantages described in claim 6, the weft inserting device comprises a plurality of blowing nozzles arranged in the transverse and vertical directions. For example, according to claim 7, a servomotor, a direct current motor, or especially an AC motor is suitable for the moto drive.

According to claim 8, the loom has a control device for pattern control connected to each motor drive device for pattern control. Thus, wefts of different color or quality may be used as a function of the patterned fibers to be produced.

According to claim 9, when the thread strand breaks, the control device prevents the weft thread from moving to the shear so as to release the broken weft and position a new portion of the weft.

Embodiments of the loom are described in more detail with reference to the accompanying drawings.

1 shows the weaving area of the weaving machine in the weft insertion device during weft insertion;

2 shows a cross section of a loom cut in the vertical direction;

3 shows the loom of FIG. 1 during the beating-up of the weft and during the cutting of the weft;

4 shows the loom of FIG. 3 from above.

<Explanation of symbols for the main parts of the drawings>

H: vertical direction

Q: landscape orientation

2: warp

4: seeding device

6: sed

8: weft inserting device

10: weft

12: body

14: beating-up edge

16: cloth net

20: nozzle block

22: blowing nozzle

24: vertical axis

26: horizontal axis

28: first driving device

30: motor

32: level mechanism

34: second drive unit

36: motor

38: lever mechanism

40: guide passage

42: guide mechanism

44: staggered nozzle

46: shearing machine

50: control unit

1 to 4 show only the important parts of the weft insertion region of the weaving machine, other characteristics of the weaving machine as in the prior art.

1 to 3 show the weaving area of the weaving machine, where the warp yarn 2 is an opening through which the weft 10 is inserted by the weft inserting device 8 using a seeding device 4, for example a jacquard machine. Move to the sed (6). By the body 12 weft 10 is beated up at the beat-up edge 14 to obtain a cloth net 16.

The weft insertion device 8 is designed pneumatically and in an embodiment has a nozzle block 20 with eight blowing nozzles 22, where the nozzle block 20 is shown in FIG. It is arranged in pairs in the transverse direction Q, and as shown in Fig. 2, four pairs of these blowing nozzles are arranged on top of each other in the vertical direction H. The nozzle block 20 is arranged to be rotatable through the vertical axis 26 in the horizontal direction Q, and is mounted to be rotatable about the horizontal axis 26 in the vertical direction H. The first drive device 28 includes a motor 30 that is connected to the blow nozzle 22 via a lever mechanism 32. The second drive device 34 for rotating the blow nozzle 22 in the vertical direction H is arranged in a similar manner. This second drive device includes a motor 36 connected to the blowing nozzle 22 via a lever mechanism 38. The first drive device 28 and the second drive device 34 select one of the blowing nozzles 22 to align with the same axis as the guide passage 40 of the guide mechanism 42 connected to the body 12. Initially provided, and provided to guide the inserted weft 10. The staggered nozzle 44 is provided for moving forward the weft inserted along the guide passage 40.

The first drive device 28 acts only as the shearer 46 actually works when the inserted weft 10 is actually beated up at the beat-up edge 14, as shown in FIGS. 3 and 4. In such a manner, it is provided to move the blow nozzle 22 toward a fixed shear 46 disposed in the region of the biting-up edge 14 of the cloth 16.

The control device 50 connected to the first and second drive devices 28, 34 is a loom for selecting the blowing nozzles 22 which are required for the pattern to be produced and which position the weft 10 for the pattern. And thereby control of the pattern of the first driving device 28 and the second driving device 34. In addition, a control device is provided for controlling the drive devices 28, 34 so that the weft yarn is accurately positioned at the shear 46.

Various modifications and variations are possible without departing from the spirit and scope of the invention. The above embodiments are intended to present the invention of the ball, but the present invention is not limited to these embodiments. The scope of the present invention is set forth by the appended claims rather than the embodiments, and various modifications made within the scope of the claims and the same meaning are all considered to be within the scope of the present invention.

Claims (9)

A body 12 and a guide mechanism 42 with a guide passage 40 for the weft 10, the guide passage 10 between the insertion position and the beating-up position for the weft 10; 12, the guide passage 10 is provided in a fixed weft inserting device 8 equipped with at least two blowing nozzles 22, which is rotatable with the insertion position, to cut the inserted weft 10 A loom with a pneumatic weft insert with a fixed shear for In order to move the blow nozzle 22 toward the shear 46, the blow nozzle 22 is rotatably mounted in the transverse direction Q toward the shear 46, and the motor drive device 28 Loom with a pneumatic weft insert, characterized in that connected to). The method of claim 1, The drive device (28) is a weaving machine with a pneumatic weft insert, characterized in that the cutting of the inserted weft (10) takes place in the region of the beating-up edge (14) of the cloth (16). The method according to claim 1 or 2, The drive device (28) is a weaving machine with a pneumatic weft insert, characterized in that the blowing nozzles (22) are designed to be aligned on the same axis in the transverse direction (Q) with respect to the guide passage (40). The method according to any one of claims 1 to 3, The blower nozzle (22) is rotatably mounted and is also driven in a vertical direction (H) across the transverse direction (Q). The method of claim 4, wherein The blowing nozzle 22 is also connected to a motor driving device 34 for the vertical direction H, in order to align the guide passage 40 with one of the blowing nozzles 22 in the vertical direction H. Loom with a pneumatic weft insert, characterized in that. The method according to any one of claims 1 to 5, The weft inserting device (8) is a weaving machine with a pneumatic weft insert, characterized in that it comprises a plurality of blowing nozzles 22 arranged in the transverse direction (Q) and the vertical direction (H). The method according to any one of claims 1 to 6, Loom loom with a pneumatic weft insert, characterized in that the motor drive (28, 34) comprises a servo motor, a direct current motor or an AC motor. The method according to any one of claims 1 to 7, Loom with a pneumatic weft insert, characterized in that it comprises a control device (50) for pattern control, connected to each motor drive device (28,34) to control each motor drive device (28, 34). The method according to any one of claims 1 to 8, The control device (50) is a weaving machine having a pneumatic weft insert, characterized in that the weft yarn (10) is designed in such a way that can not move to the shear (46) when the thread strands are broken.

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