JPH07238443A - Method for weaving pattern woven fabric and apparatus for easing for weaving pattern woven fabric - Google Patents

Abstract

PURPOSE:To provide a method for weaving by which warp yarn breakage due to sagging or slacking of pattern warp yarns or defective flying of weft yarns due to defective shedding can be prevented from occurring by using a machine of a specification of using usual one warp yarn beam as a base. CONSTITUTION:The characteristic of this method for weaving pattern woven fabric comprises operating an easing motion for pattern warp yarns in the direction opposite to that of an easing motion for ground warp yarns in weaving pattern woven fabric having a weaving pattern in the warp yarn direction. Furthermore, the characteristic of this apparatus for easing for weaving the pattern woven fabric comprises an easing roller 3 for the ground warp yarns, a subeasing roller 4 for the pattern warp yarns and further a means for driving the easing roller and the subeasing roller so as to operate the easing motion for the ground warp yarns 1 and the easing motion for the pattern warp yarns 2 in the opposite direction in an apparatus for easing in a loom for weaving the pattern woven fabric.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is to arrange warp yarns of different materials or the same material having different thicknesses, partially changing the weaving structure of the same material, and further combining them to form a woven pattern. The present invention relates to a method for weaving a patterned fabric to be formed and an easing device for weaving a patterned fabric.

[0002]

2. Description of the Related Art When arranging different materials for warp or the same material having different thicknesses, partially changing the woven structure of the same material, and further forming a woven pattern by a combination thereof, Also in the same fabric, since different thicknesses and parts having different weaving structures are coexistently arranged in the same woven fabric, each warp causes a difference in bending structure during weaving,
The crimp of the warp, that is, the shrinkage in the warp direction, is different. As a result, a tension difference occurs between the warps. Usually, a warp group with a small weft shrinkage in the warp direction has a small tension, a sagging phenomenon occurs during weaving, and warp defects and warp breakage occur frequently.
This may result in poor fabric quality and poor weavability due to obstacles during weft insertion.

Conventionally, as a means for solving this problem, a plurality of warp feed-out feeders (warp yarn beams) are separated, and the tension is adjusted by setting and controlling the feed amount according to the difference in weft shrinkage of each warp. The method of homogenizing is uniformed and put into practical use.

[0004]

However, this type of device is equipped with a special device for forming a plurality of warp beams,
Since it requires an individual feeding control device for a plurality of warp beams and is extremely complicated, there are problems such as inconvenience in terms of operability and high cost for implementing these devices.

The present invention solves these problems all at once, without using such an extremely complicated and large-scale device, and on the basis of a machine with a normal one warp yarn beam specification, the above-mentioned handle. The present invention provides an epoch-making method for solving the problem that occurs during weaving of a woven fabric, and also has an advantage that it is superior to the conventional device in terms of high speed.

[0006]

In order to achieve the above object, the present invention is characterized by having the following constitution.
That is, when weaving a patterned fabric having a woven pattern in the warp direction, the weaving method of the patterned fabric is performed by operating the easing motion of the pattern warp yarn in the opposite direction to the easing motion of the ground warp yarn. Is.

Further, in an easing device in a loom for weaving a patterned fabric, an easing roller for the ground warp and a sub-easing roller for the pattern warp are provided, and the easing motion of the ground warp and the easing motion of the pattern warp are in opposite directions. An easing device for weaving a patterned fabric, comprising means for moving the easing roller and the sub-easing roller so as to operate.

Hereinafter, the present invention will be described in detail with reference to the drawings.

1 and 2 are explanatory views for explaining the method of the present invention.

FIG. 1 shows how the easing roll 3 of the ground warp moves rearward with respect to the weaving yarn together with the closing of the warp. Further, FIG. 2 shows a state in which the easing roll 3 of the ground warp moves forward with respect to the weaving yarn as the warp opens.

In the present invention, when weaving a patterned fabric, weaving is performed by providing an easing roller 3 for the ground warp and a sub-easing roller 4 for the pattern warp.

In FIG. 1, as the heddle 7 is closed, the easing roller 3 for the ground warp works in the direction of pulling the ground warp 1 (the direction of the arrow), while the sub-easing roller 4 for the pattern warp The handle warp yarns 2 are operated in a direction of loosening (the direction of the arrow).

In FIG. 2, as the heddle 7 opens, the easing roller 3 for the ground warp works in a direction to loosen the ground warp 1, while the sub-easing roller 4 for the pattern warp pulls the pattern warp 2. Actuate in the direction.

That is, the easing motion of the ground warp and the easing motion of the handle warp are operated in opposite directions.

As a result, the pattern warp (which has a smaller weaving shrinkage than the ground warp) loosens because the tension of the warp is too low especially when the warp is opened. Since it acts in the direction of pulling, the tension of the ground warp and the handle warp can be made uniform. In other words, when the warp is opened, it is possible to properly tension the pattern warp from the start of the weft flight to the completion of the flight so that it does not hinder the weft insertion, and especially the pattern warp and the ground warp are the same. It is possible to prevent the "sagging and sagging phenomenon" that occurs when wound around the yarn beam.

Further, since a flat design is usually adopted as the ground thread and a twill design or satin design is adopted as the handle, the normal pattern warp has a smaller weaving shrinkage than the ground warp. If the weft shrinkage of the ground warp is smaller, the easing motion having the opposite relationship to the above may be performed.

Incidentally, FIG. 5 shows an explanatory view for explaining an example of the patterned fabric. In FIG. 5, the ground yarn part (white part) has a flat design, and the handle part (hatched part) has a 3/1 or 4/1 twill structure or a satin design, and the warp float number is continuous in the warp direction. Indicates.

Next, the apparatus of the present invention will be described in detail with reference to the drawings.

3 and 4 are schematic views showing an example of the apparatus according to the present invention.

FIG. 3 shows the state of each part when the heddle 7 is closed. FIG. 4 shows a state of each part when the heddle 7 is opened.

In FIG. 3, a substantially cross-shaped connecting lever 11 for connecting the core of the easing roll 3 for the ground warp and the core of the sub-easing roll 4 for the handle warp is swingable around a fulcrum 12. An easing / motion operating indicator 14 and an easing rod 15 are connected to one end of another arm, which is below the fulcrum 12 of the connecting lever 11 and faces the fulcrum 12 having a substantially cross shape, through an elongated hole portion 13.

As shown in FIG. 3, the position of the crank pin 16 of the operating indicator 14 is set to the rearmost position with respect to the weaving yarn when the warp yarn is minimum closed. on the other hand,
As shown in FIG. 4, the crank pin 16 of the operating indicator 14 is set to be the frontmost with respect to the weaving yarn when the warp yarn is at the maximum opening.

Therefore, when the warp is closed, the easing roll 3 for the ground warp is located at the rearmost position with respect to the weaving yarn, so that the ground warp is pulled, while the sub-easing roll 4 for the pattern warp is located at the lowermost end. Operates in the direction to loosen the warp. On the contrary, when the warp yarn is opened, the easing roll 3 for the ground warp is located at the frontmost position with respect to the weaving yarn, and thus acts in a direction of loosening the ground warp yarn, while the sub-easing roller 4 for the pattern warp yarn is located at the uppermost end. The handle warp yarn to be loosened can be forcibly pulled to give tension.

The easing amount is set by the bolt position of the slot 13.

3 and 4 show an example of the present invention, and the present invention is not limited to this as long as the easing motion of the ground warp and the easing motion of the handle warp can be controlled as described above. . In short, it is sufficient to provide a mechanism capable of operating the easing motions of the ground warp and the pattern warp in the opposite directions, and acting so as not to loosen the warp with the smaller weaving shrinkage.

In the present invention, easing of ground warp yarns
It is more desirable to link the motion with the easing motion of the pattern warp from the viewpoint of simplification of the device and cost, and especially from the viewpoint of high speed correspondence such as jet loom.

[0027]

EXAMPLES The present invention will be described in more detail below with reference to examples.

[Example 1, Comparative Example 1] A warp yarn and a weft yarn were made of 45% spun yarn of 65% polyester and 35% cotton. The warp yarn was wound on the same yarn beam and the ground warp structure was 1/1 flat. As a woven fabric, a patterned woven fabric having a pattern warp structure of 5 sheets satin and a flat structure of 2/2 was woven.

The loom was AJL type T500 manufactured by Toyota, and the loom rotational speed was 545 rpm. Table 1 shows weaving conditions and weaving results (Example 1) when weaving with the easing device of the present invention as shown in FIGS. 3 and 4, in comparison with the conventional method (Comparative Example 1).

The textile standards are as follows.

Raw machine width (in) × length (yds) 47.5 × 123 Raw machine density Vertical (books / in) × horizontal (books / in) 124 × 72 Organization chart and number of warp yarn arrays Organization chart is shown in FIG. Indicated.

Flat 2/2 1 = 202 threads Satin 4/1 2,3,4,5,6 = 816 threads Flat 1/1 7,8,9,10 = 4856 threads Total number of warp threads 5874 threads

[Table 1] In the case of the conventional method (Comparative Example 1) in which the ground warp and the pattern warp are fed from the same easing motion, the flat design 1 /
1 against the warp tension of the ground warp, which is 1 / the flat design of the handle warp part 2 /
2 and satin 4/1 handle warp has small weaving shrinkage,
At the time of opening, the tension of the handle warp is low and sagging occurs, resulting in many warp breakages at 3.11 times / hour. In addition, there is also a weft cause stop such as catching of the weft due to delay in opening of the handle warp 6.5 times / hour. It often happened to be a stand. Therefore, the weaving function rate was extremely low at 64.1% and the C reaction rate was 4.0%, which was poor.

On the other hand, as in the present invention, the ground warp is supplied in the normal easing motion and the pattern warp is supplied in another easing motion, and the easing motion is applied in the direction opposite to the easing motion of the ground warp at the time of opening. By operating, the warp tension of the ground warp and the warp tension of the handle warp portion were made uniform, and sag and delay of opening of the handle warp were eliminated. As a result, the warp breakage was reduced to 0.33 times / hour / stand and the weft cause stop was also reduced to 2.09 times / hour / stand. The weaving function rate was also improved to 85.8%, and the C reaction rate was also significantly reduced to 0.2%.

[Example 2 and Comparative Example 2] 45-count spun yarn of 65% polyester and 35% of cotton was used as the ground warp and weft, and a polyester filament yarn of 150 denier was used as the pattern warp and a spun yarn of the same kind as the above-mentioned warp. Was wound on the same yarn beam, and a pattern woven fabric having a plain weave having a ground warp design of 1/1 and a filament yarn of the pattern warp and a spun yarn having a woven design of 3/1 was woven. The loom was AJL type T500 manufactured by Toyota, and the loom rotational speed was 545 rpm.

The same easing device as in Example 1 was used. Table 2 shows weaving conditions and weaving results at that time.

The textile standards were as follows.

Raw machine width (in) × length (yds) 47.5 × 123 Raw machine density Vertical (books / in) × horizontal (books / in) 106 × 72 Organization chart and number of warp yarns Organization chart is shown in FIG. Indicated.

Filament 3/1 1,2,3,4 = 426, span 3/1 5,6 = 350, span 1/1 7,8,9,10,11,12 = 4284, total warp number 5060

[Table 2] In the case of the pattern woven fabric according to the present example in which the filament yarn and the spun yarn are mixed in the pattern warp and the design is the woven design of 3/1, the difference in tension from the ground warp is more remarkable, and the ground warp and the pattern warp are In the conventional method (comparative example 2) in which the same easing motion is sent out, even if the total warp tension is set to a high value of 220 kg, the "sagging phenomenon" of the pattern warp and the opening delay are severe, and the warp breakage and the weft cause are caused. Weaving was frequent and weavability was extremely poor. However, in the case of the present invention (Example 2) in which only the pattern warp and another sub-easing motion are used,
Even if the total warp tension was lowered to 180 kg, the tensions of the ground warp and the pattern warp were made uniform, and the warp breakage could be reduced to about 1/10 and the weft breakage to about 1/4. Therefore, the weaving function rate was also improved to 91.7%, and the C reaction rate was 0%, which was extremely good.

[0039]

According to the present invention, it is possible to prevent warp breakage due to sagging of the pattern warp of the pattern fabric and poor weft flying due to poor opening.

Further, in the past, in order to reduce the opening failure due to the sagging phenomenon of the warp, the overall warp tension is increased,
Although there are many cases in which the opening amount is increased, the appropriate warp tension and the limit tension are exceeded, leading to poor weavability and poor quality, whereas the present invention makes the warp tension of the ground warp and the pattern warp uniform. The warp tension can be optimized and reduced easily, and the load on the warp can be significantly reduced.

Further, by connecting and interlocking the ground warp easing motion and the pattern warp sub-easing motion, the easing operation is simplified and high speed can be supported. Since the total warp tension can be lowered, the consumption of the dobby machine body and accessories can be reduced.

[Brief description of drawings]

FIG. 1 is an explanatory diagram illustrating a method of the present invention.

FIG. 2 is an explanatory diagram illustrating a method of the present invention.

FIG. 3 is a schematic view showing an example of an apparatus according to the present invention.

FIG. 4 is a schematic view showing an example of an apparatus according to the present invention.

FIG. 5 is an explanatory view showing an example of a patterned fabric.

FIG. 6 is a structural diagram of the patterned fabric of Example 1.

FIG. 7 is a structural diagram of a patterned fabric of Example 2.

[Explanation of symbols]

 1: Ground warp 2: Handle warp 3: Easing roller 4: Sub-easing roller 5: Guide roller 6: Yarn beam 7: Heald 8: Reed 9: Winding roller 10: Cross beam 11: Connection lever 12: Connection lever fulcrum 13 : Connection lever slot 14: Actuation indicator 15: Easing rod 16: Crank pin

Claims (6)

[Claims] 1. When weaving a patterned fabric having a woven pattern in the warp direction, the woven motion is performed by operating the easing motion of the pattern warp yarn in the direction opposite to the easing motion of the ground warp yarn. Weaving method. 2. The method for weaving a patterned fabric according to claim 1, wherein the patterned warp yarn and the ground warp yarn are wound on the same yarn beam. 3. An easing motion of a warp that causes tension in the warp when the warp is closed, and an easing motion of the warp that loosens the warp when the warp is opened. 3. The method for weaving a patterned woven fabric according to claim 1, wherein the woven fabric is an easing motion for loosening the ground warp while the easing motion is for the patterned warp to be tense. 4. An easing device in a loom for weaving a patterned fabric, comprising an easing roller for a ground warp and a sub easing roller for a pattern warp, and the easing motion of the ground warp and the easing motion of the pattern warp are in opposite directions. An easing device for weaving a patterned fabric, comprising means for moving the easing roller and the sub-easing roller so as to operate. 5. A connecting lever, which has a substantially cross shape and is swingable around a fulcrum located at one end of one arm of the substantially cross shape, and below and above the fulcrum of the connecting lever. A ground warp easing roller attached to one end of another substantially cross-shaped arm, and another arm below the fulcrum of the connecting lever and facing the substantially cross-shaped ground warp easing roller A sub-easing roller for handle warp to be attached to one end of the arm, and an elongated hole portion at one end of another arm below the fulcrum of the connecting lever and facing the fulcrum of the substantially cross shape, The pattern fabric weaving easing device according to claim 4, wherein a member for transmitting a crank motion for rocking the connecting lever is connected to the hole portion. 6. An easing roller for a ground warp and a handle so that an easing motion of the ground warp causes tension of the ground warp when the warp is closed, while an easing motion of the handle warp causes loosening of the handle warp. When the sub-easing roller for warp operates, the easing motion of the ground warp is such that the ground warp loosens when the warp is opened, while the easing motion of the pattern warp is such that the pattern warp is tense The easing device for weaving a patterned fabric according to claim 4, wherein the easing roller and the sub-easing roller for the pattern warp operate.