JP2944766B2 - Seamless tubular fabric - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seamless tubular woven fabric useful as a base fabric for applications such as a seamless ink ribbon and a seamless belt.

[0002]

2. Description of the Related Art Seamless ink ribbons are used in impact-printing printers for devices such as computers and word processors. Seamless belts without seams are also used as power transmission or conveyance belts. The base fabric of the seamless ink ribbon and the seamless belt is obtained by radially cutting the seamless tubular woven fabric obtained by the bag weaving method.

[0003] A seamless tubular fabric typically arranges the warp yarns in a double-sided manner and hangs them on members belonging to separate motion systems, while appropriately controlling the movement of the two systems. It is obtained by performing a weft insertion motion with one weft, and weaving so that the warps on the front and back are joined by the weft only at the ends of both ears. ("Product Knowledge Series, Practical Knowledge of Fiber, 6th Edition, Published by Toyo Keizai Shimpo, Showa 61
(See pages 143 to 145 of the 9th printing on October 20, 2008)

Usually, a warp is coated with a sizing agent during weaving, and after weaving, scouring is performed to remove the sizing agent. After the scoured tubular fabric is inserted into a suitable support, the shape is adjusted by performing heat setting such as calendaring as appropriate,
Radial cutting is performed by fusing or other means.

Although it has no direct relation to the present invention,
JP-A-61-254377 discloses that a hot-melt fiber yarn is intermittently supplied as a weft yarn for forming a border line in a multicolor ribbon. In the gazette, in order to reinforce the strength of the base fabric for the ink ribbon, one to several yarns harder than the yarns constituting the ground texture portion are woven in the longitudinal direction of the fabric at arbitrary intervals of the yarns of the ground texture portion. It has been shown.

[0006]

When the seamless tubular fabric is cut as described above to obtain a base fabric for a seamless ink ribbon or a seamless belt, the cutting is performed in a state where the tubular fabric is inserted into the support. However, in this case, it is possible to precisely align the warp directions, but it is extremely difficult to accurately align all the wefts in the radial direction.

[0007] Therefore, when cutting is performed in the radial direction, cutting cannot be performed in parallel to the weft, and a cut portion of the weft occurs on the cut surface. In this case, the uniformity of the base cloth is impaired.For example, when the base cloth is used as an ink ribbon and stored in a cassette, the ribbon undulates in a "wakame" shape near the head, and the print becomes unclear or the paper becomes dirty. May be. This "wakame" waving becomes inconspicuous if tension is applied to the ribbon, but increasing the tension means that the power must be increased, which is disadvantageous in terms of energy. The market demand is to minimize power as much as possible, and it is urgent to meet this demand. Also, the occurrence of a cut portion of the weft on the cut surface may cause disadvantages such as loosening from the cut surface, reduction in strength, meandering during running, and the like.

If the state of the weft can be grasped when cutting the seamless tubular fabric, the cutting can be performed in parallel with the weft direction. An object of the present invention is to provide a seamless tubular woven fabric from which it is possible to grasp the presence or absence of a warp or the state of the warp.

[0009]

Seamless tubular fabrics of the present invention, in order to solve the problem] is the tubular fabric obtained by the bag weave method, 1
The main weft (2a) area is intermittently dyed
Dyed weft that has formed a weft (2b) area
(2) is inserted by one weft , so that it can be distinguished from the main weft (2a) in the structure of the weft (2) in the ground structure composed of the warp (1) and the weft (2). Weft yarn for confirming the thread line (2
b) is characterized by intermittent weft insertion.

Hereinafter, the present invention will be described in detail.

[0011] The seamless tubular woven fabric is obtained by a bag weaving method. That is, when performing the weft insertion movement of the weft with respect to the front warp, the back warp is made to stand by at a position not participating in the weft insertion movement, and when the weft turns back and performs the weft insertion movement, the back warp is raised. Then, the warp in the front is arranged at the standby position while the weft insertion motion is performed. This operation is repeated by properly controlling the vertical movement. At this time, the binding of the front warp and the back warp by the weft is performed only at the both ear ends.

The warp (1) and the weft (2) include synthetic fibers (including high-strength fibers and heat-resistant fibers), semi-synthetic fibers, recycled fibers, natural fibers, carbon fibers, glass fibers, ceramic fibers, and metal fibers. Available on the market made from fibers such as
Multi-filament yarn or multi-filament yarn
Any thread such as a thread is used. Of particular interest for ink ribbons are nylon multifilament yarns and polyester multifilament yarns.

In the present invention, the weft (2a) of the ground structure composed of the warp (1) and the weft (2) has a weft for confirming a thread line that can be distinguished from the main weft (2a). (2b) is intermittently inserted. One reciprocation or several reciprocations of the weft (2b) for checking the thread line per unit is sufficient.

Further, in the present invention, the above weft insertion is
One weft (2) is dyed intermittently and the main weft (2a)
Dyeing weaving that formed the area and the weft (2b) area for yarn streak confirmation
This is performed by wefting the yarn (2) one by one. The dyeing may be performed, for example, by intermittently dyeing the yarn wound around the cheese or the cone while feeding the yarn, passing the yarn through a drying oven, and then winding the yarn around the bobbin.

It is to be noted that the main weft (2a) and the weft (2b) for confirming the thread line are separately used, and it is also considered that these are inserted into two wefts.
However, when the yarn is switched, the yarn is cut at the end of the tubular fabric.
This is not an appropriate method because it will cause a stump.
No.

In order to distinguish the weft (2b) for confirming the streak from the main weft (2a), it is only necessary to change the color or the color tone so that it can be visually recognized, but under certain conditions (for example, under black light irradiation). ) May be visually distinguishable, or may be identifiable by other optical means, electrical means, magnetic means, or the like. In any case, the part of the weft (2b) for checking the thread line is also a part of the product fabric, so the main weft (2b)
In the case of a), it is more advantageous not to change the fiber material, the fiber thickness per fiber, or the number of fibers.

The seamless tubular fabric of the present invention is particularly useful as a base fabric used for applications such as a seamless ink ribbon and a seamless belt.

[0018]

The radial cutting of the seamless tubular fabric of the present invention is performed in a state where the tubular fabric is externally fitted to a roll or a plate.
This is achieved by performing fusing or mechanical cutting using the weft (2b) as a guide. This cut is a weft thread
It may be performed while observing (2b) with the naked eye, or automatically by detecting the weft (2b) for checking the streak with a sensor. This makes it possible to cut parallel to the weft (2).

[0019]

The present invention will be further described with reference to the following examples.

Embodiment 1 FIG. 1 is a perspective view showing an example of the seamless tubular fabric of the present invention. FIG. 2 is an explanatory diagram showing an example of a weaving (2) dyeing process. FIG. 3 is a perspective view showing a state where the seamless tubular fabric is cut in the radial direction.

According to FIG. 2, a weft yarn (2) dyed and separated using a 40d / 34f nylon multifilament yarn was produced. That is, the yarn was dyed intermittently by the dyeing means (6) while feeding out the colorless yarn wound on the cheese (5). The dyed area had a length of two reciprocations during weft insertion. Then, it was passed through a drying oven (7) and wound up while being traversed on a bobbin (8). Thereby, one weft (2)
Was intermittently dyed to produce a weft (2) in which a main weft (2a) region and a weft (2b) region for checking a streak were formed, and this was inserted into the shuttle.

40d / 34 glued as warp (1)
Using a nylon multifilament yarn of f and the dyed yarn as the weft (2), a seamless tubular woven fabric having a perimeter of 1600 mm was woven by a one-by-one bag weaving method (see FIG. 1). The yarn density was set so that the warp (1) was 132 yarns / inch and the weft (2) was 142 yarns / inch.

The seamless tubular woven fabric obtained above is scoured by a conventional method, heat-set, and then laid between two rollers (3) and (3) as shown in FIG. While rotating (3) and (4), the cutter blade (hot blade) (4) was brought into contact with the tubular fabric using the weft (2b) for confirming the thread line as a guide, and the fabric was cut to a width of 8 mm in the radial direction.

Observation of the fusion surface of the obtained seamless ink ribbon base fabric revealed that the fusion surface was parallel to the weft (2) at the end.

When the base cloth was impregnated with ink to form an ink ribbon, and the ink was stored in a cassette and printing was performed, the ribbon was "wakame" near the head even when the power was extremely reduced.
It was possible to perform clear printing without forming a state.

[0026]

According to the seamless tubular fabric of the present invention, one weft (2) is intermittently dyed and divided into the main weft (2).
The dyed part which formed the a) area and the weft (2b) area for confirming the thread line
The warp is inserted by one weft (2),
(1) and weft (2)
Since the weft (2b) for confirming the streak, which can be distinguished from the main weft (2a), is intermittently inserted into the structure according to the above, when the tubular fabric is radially cut, the weft for the streak confirmation is used. Using (2b) as a guide, it is possible to cut in parallel with it.

As a result, no cut portion of the weft is formed on the cut surface, and the uniformity of the base fabric is maintained. For example, when the base fabric is used as an ink ribbon and stored in a cassette, even if the power is reduced, the vicinity of the head is reduced. Therefore, the phenomenon that the ribbon undulates like "wakame" does not occur. Further, disadvantages such as the conventional loosening from the cut surface, reduction in strength, meandering during running, and the like are eliminated.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of a seamless tubular fabric of the present invention.

FIG. 2 is an explanatory view showing an example of a weaving (2) dyeing step.

FIG. 3 is a perspective view showing a state where a seamless tubular fabric is cut in a radial direction.

[Explanation of symbols]

 (1) ... warp, (2) ... weft, (2a) ... main weft, (2b) ... weft for checking thread streak, (3) ... roller, (4) ... cutter blade, (5) ... cheese, (6 ) ... dyeing means, (7) ... drying oven, (8) ... bobbin

Claims (1)

(57) [Claims] In a tubular woven fabric obtained by a bag weaving method, one weft (2) is dyed intermittently to form a main weft (2).
The dyed part which formed the a) area and the weft (2b) area for confirming the thread line
The warp is inserted by one weft (2),
(1) and weft (2)
During tissue by, the main weft (2a), characterized in that the identifiable filament confirmation weft (2b) is intermittently NukiIri sheet <br/> Muresu tubular fabric.