JP2002194690A - Textile having seam for paper making and method for manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a textile having a seam for paper making constituted as capable of reducing vibration/allophone generated in movement in a paper machine. SOLUTION: This textile having the seam for paper making is constituted by connecting both ends by passing a core yarn 8 through connecting loops 7 formed by turning back warp 3 and 4 on a paper machine, is provided with dense domains 10 in which weft 5 is densely arranged than the other domains near the connecting loops. The textile is capable of sharply reducing vibrations/ allophones by suppressing sharp change of elastic property on the connecting loop parts in the movement in the paper machine due to the installation of the dense domains having densely installed wefts located between the connecting loop parts and the other parts.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a papermaking fabric such as a felt base fabric used in a press part or a dry part in a papermaking process or a net used in a wire part, and a method for producing the same. TECHNICAL FIELD The present invention relates to a woven fabric with a seam joined endlessly through a core wire to a joining loop of a portion and a method for producing the same.

[0002]

2. Description of the Related Art In order to improve the workability of inserting a felt into a paper machine, there is known a so-called seam felt in which an end felt is drawn into a felt run and both ends are joined to each other to be endless. . The joining of both ends is performed by alternately engaging loops, which are formed by folding back the warp yarns constituting the base fabric at the ends, so that the center holes thereof are aligned with each other. It is performed by passing through.

[0003]

However, in such a seam felt, elastic characteristics such as a crush limit at a joining loop portion are greatly different from those of a ground portion. Therefore, when a compressive or bending deformation force is applied, vibration and abnormal noise are caused to cause a decrease in durability and an increase in noise. Therefore, appropriate measures are desired.

[0004] The present invention has been devised to solve such problems of the prior art, and its main objects are as follows.
It is an object of the present invention to provide a woven fabric with a seam for papermaking and a method for manufacturing the same, which can reduce vibration and abnormal noise generated during traveling in a paper machine.

[0005]

In order to achieve the above object, in the present invention, a papermaking seam in which both ends are joined through a core wire through a joining loop formed by folding back a warp on a paper machine. The structure of the woven fabric was such that a dense area in which the weft on the paper machine was arranged more densely than the ground portion was provided near the joining loop.

According to this, by arranging the wefts densely, that is, by increasing the number of wefts (the number per unit length), an elastic property intermediate between the joining loop portion and the ground portion can be obtained. Since the dense region where the weft yarns are densely arranged is provided between the joining loop portion and the ground portion, it is possible to avoid a sudden change in the elastic characteristic in the joining loop portion while running the paper machine. As a result, the thickness change in the direction along the running direction in the compressed state by the roll becomes gentle,
Vibration and abnormal noise during running can be significantly reduced.

Further, in the present invention, in manufacturing a woven fabric with a seam for papermaking in which both ends are joined by passing a core wire into a joining loop formed by folding back a warp on a paper machine, an ear on a loom is used. In the weaving step, weaving is performed so that a joining loop is formed. In this weaving step, the position of the temple (extension) holding the ear is adjusted to reduce the interval between warp yarns serving as wefts on the paper machine. In the vicinity of the joining loop, a dense region in which the weft yarns on the paper machine were arranged more densely than the ground portion was formed. More desirably, it is preferable to partially increase the number (insertion) of warping yarns passed through one reed.

According to this, since the dense area can be provided without modifying the loom, it is possible to avoid an inconvenience of increasing the manufacturing cost. In addition, by adjusting the position of the temple and, if necessary, adjusting the number of warp yarns per one reed and the range for increasing the number of warp yarns per one reed, the weft insertion in the dense area is achieved. It is possible to easily adjust the formation range of the number and dense area, that is, the length in the length direction, thereby making it possible to form an appropriate dense area according to the specifications of the fabric and the structure of the paper machine. .

It is possible to form a dense region simply by increasing the number of warp yarns per reed, but in this case, the number of warp yarns per bird is limited, and warp yarns are limited. If the number of fibers is excessively increased, the warp yarn may be easily damaged during beating. It is also possible to form a dense area by partially setting the interval between the reed wings. In this case, the advantage that the loop formation position is not limited to the ear part is obtained, but the dense area is obtained. It is difficult to finely adjust the number of weft threads and the formation range of the dense area in the above, and a device such as partially processing the reed is required.

The present invention is suitable for a base fabric of felt used in a press part in a paper making process. However, the provision of a dense region makes the portion thicker, and has an advantage of reducing abrasion of a joining loop during running. Therefore, the present invention is also effective for a net (wire) used in the wire part and a felt base fabric used in the dry part.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 shows a seam felt provided with a base fabric to which the present invention is applied. This seam felt is
A nonwoven fiber layer 2 is laminated and integrated on a base fabric 1 having a double-woven structure, and two warps 3
.4 are arranged one on top of the other in the thickness direction.
Is entangled with the weft yarn 5.

The two warp yarns 3 and 4 are formed by hooking a driving yarn on a loop forming core wire made of a yarn or a similar linear material and folding the same in the thickness direction. A joining loop 7 is formed at the end. Have been. This joining loop 7
The core wire 8 is inserted in the width direction in a state where the core wire 8 is engaged with the joining loop 7 at the other end, thereby joining both ends.

In the vicinity of the joining loop 7, a dense area 10 in which the weft 5 is arranged more densely than the ground portion is provided over a predetermined length from the weft 5 near the joining loop 7. The dense regions 10 are respectively provided at both ends of the base fabric 1, and the dense regions 10 are arranged on both sides of the joining loop portion in a state where the dense regions 10 are joined to each other through the core wire 8 through the joining loop 7.

The number of weft yarns 5 in the dense region 10 and the formation range of the dense region 10, that is, the length in the length direction may be appropriately determined according to the material and thickness of the weft and the warp. The thickness of the weft is φ0.4mm and the thickness of the warp is φ0.3
In the range of 3 mm to 0.41 mm, when the number of wefts 5 in the ground portion is 40 yarns / inch, the number of wefts 5 in the dense region 10 is 56 yarns / inch, and It is preferable that the formation range be 1/4 inch.

In addition, in order to form an appropriate dense area 10 where the required effect can be obtained, it is desirable to finely adjust the number of weft threads 5 and the formation range in the dense area 10 according to various conditions. Conditions that influence the set value of such a dense area 10 include the structure and operating conditions of the paper machine, the structure of the weaving structure, the size of the joining loop 7, the material and thickness and the number of joining core wires 8, and the nonwoven fabric. The layer thickness of the fiber layer 2 can be mentioned.

In the base fabric 1 thus configured, the warp yarns 3 and 4 on the paper machine are used as wefts (drive yarns) on the loom, and the wefts 5 on the paper machine are used as warps (warp yarns) on the loom. For example, as shown in FIG. The joining loop 7
The ear 1 is formed on one of the ears 12 and 13 on the loom.
By pulling out the loop forming core wire 14 used to fold the driving yarns to be the warp yarns 3 and 4 in 2, the ended base fabric 1 is obtained.

In this case, the tight regions 10 are formed at both ends of the base fabric 1 by narrowing the interval between the warp yarns serving as the wefts 5 at the one end 12 on which the joining loop 7 is formed. Specifically, as shown in FIG. 3, the position of the temple (extension) 16 holding the ear 12 is shifted in the horizontal direction, and the warp yarn per reed 17 over a required range. Are increased, for example, four lines are increased to six lines (see FIG. 4). As a result, the warp yarns, which are drawn out of the heald 18 and become the weft yarns 5 passing through the reed 17, become dense over a required range, and the dense region 10 is formed there.

Although a base fabric having a double weave structure has been described here, the present invention can also be applied to a base fabric having a single weave, triple weave, quadruple weave, or a similar multiweave fabric structure.

[0020]

As described above, according to the present invention, the dense region where the weft yarns are arranged more densely than the ground portion is provided in the vicinity of the joining loop, so that the elastic characteristics at the joining loop portion during running of the paper machine. Abrupt changes can be avoided, and as a result, the thickness change in the direction along the running direction in the compressed state by the rolls becomes gradual, resulting in vibration and vibration during running.
A great effect can be obtained in greatly reducing abnormal noise.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a main part of a seam felt provided with a base fabric to which the present invention is applied.

FIG. 2 is a schematic view showing a procedure of weaving the base fabric shown in FIG. 1;

FIG. 3 is a main part top view showing the state of weaving of the base fabric shown in FIG. 1;

FIG. 4 is a schematic view of a main part showing a state of weaving of the base fabric shown in FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base fabric 2 Non-woven fiber layer 3.4 Warp 5 Weft (warping yarn) 7 Joining loop 8 Core wire 10 Dense area 12.13 Ear 14 Loop forming core wire 16 Temple 17 Reed 18 Heald

Claims (2)

[Claims] 1. A woven fabric with a seam for papermaking, wherein both ends are joined through a core wire to a joining loop formed by folding back a warp yarn on a paper machine, and a weft on the paper machine is provided near the joining loop. A woven fabric with a seam for papermaking, characterized in that a dense region arranged more densely than a ground portion is provided. 2. A method for producing a woven fabric with a seam for papermaking, wherein both ends are joined through a core wire to a joining loop formed by folding a warp on a paper machine, wherein the joining loop is attached to an ear on a loom. A weaving step in which weaving is performed so that a weft on the papermaking machine is adjusted by adjusting the position of the temple holding the ear, thereby forming the joining loop. Forming a dense area in the vicinity of the paper machine, in which the wefts on the paper machine are arranged more densely than the ground part.