JP2003041496A - Mesh woven fabric for belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mesh woven fabric for a belt having high air permeability and antifouling property, easily handleable for washing, etc., and having excellent abrasion resistance and durability against bending fatigue. SOLUTION: The mesh woven fabric for a belt is woven as follows: at least warp 13 out of warp 13 and weft 14 is a synthetic resin monofilament; and the warps 13, 13... and wefts 14, 14... are crossed each other by every stitch in weaving to produce a plain weave construction. In the mesh woven fabric, a plurality of wefts 14, 14 are parallelly inserted in a stitch. Further, a plurality of wefts 14, 14 may be parallelly inserted in every other stitch of the plain weave construction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a dryer canvas used in a paper machine, a filter cloth used in a dehydrator, or a mesh fabric for a belt used as a belt for a conveyor.

[0002]

2. Description of the Related Art Conventionally, this kind of mesh fabric for belts is used as a dryer canvas (dryer fabric) in a dryer (dryer part) of a paper machine.

In this drying device 1, as shown in FIG.
Cylinder rolls 2, 2 with an outer diameter of 100 cm or more
, And a plurality of canvas rolls 3, 3 having an outer diameter of about 20 cm, and two rolls 2, 2 having different outer diameters.
3 are alternately and continuously arranged, and a belt mesh fabric (dryer canvas) 4 in the form of an endless belt is laid over to form a drying path.
The wet paper 5 is held in the
Is heated by bringing it into contact with the cylinder roll 2 to evaporate water and dry. At this time, the front surface side of the belt mesh fabric 4 faces the cylinder roll, and the back surface side faces the canvas roll.

As such a dryer canvas, it is preferable that the dryer canvas has high air permeability and antifouling property by nature, and can be easily washed even if dirt is generated during use. In order to satisfy the above, as shown in FIGS. 8 and 9, a plurality of warp yarns 6, 6 ... And weft yarns 7, 7 ... There is known a mesh fabric for a belt, which is woven into a plain weave structure and has wide mesh openings 8, 8. The warp yarns 6, 6 forming the mesh fabric for the belt are subjected to a heat treatment after being woven, so that the crimps 9 exposed on the surface side (cylinder roll side) according to the shape of the intersecting weft yarns 7, 9 ... and the crimp 10, which is exposed on the back surface side (canvas roll side),
Are formed in a substantially triangular wave shape. Here, the first stitch means a position from a position where adjacent warp yarns cross to a position where they cross again.

[0005]

However, in the conventional technique as described above, when the belt mesh fabric is hung on the cylinder roll, the shape of the crimps 9, 9 ... As shown in FIG. 10, the crimp apex angle a is widened to the maximum value ax, and the crimps 10, 10, ... Exposed on the opposite side of the roll are narrowed until the crimp apex angle b becomes the minimum value bm. . On the other hand, when the belt mesh fabric is hung on the canvas roll, the shape of the crimps 10, 10, ... Exposed on the roll side is, as shown in FIG. The crimps 9, 9 ... which are widened until the apex angle b reaches the maximum value bx and exposed on the side opposite to the rolls,
The apex angle a of the crimp is narrowed to the minimum value am.

Therefore, when two kinds of rolls are alternately arranged continuously as shown in FIG. 7, the crimps formed on the warp of the mesh fabric for belts have apex angles on the cylinder roll side and the canvas roll side, respectively. Minimum value am, b
The bending motion is repeated in the range from m to the maximum values ax and bx, and the warp may be fibrillated and cracked due to bending fatigue in the crimp due to the bending motion, and may eventually break. There is.

Further, since the cylinder roll 2 and the canvas roll 3 have significantly different outer diameters, the crimps 9, 9 ... Exposed on the surface of the mesh fabric for belt contacting the cylinder roll (side surface of the cylinder roll) and the canvas roll. The range from the minimum value to the maximum value of the crimp apex angle differs between the crimps 10, 10 ... Exposed on the contact surface (side surface of the canvas roll), and therefore the load acting on the crimp is also exposed on the cylinder roll side and the canvas. It differs from the crimp 10 exposed on the roll side. In this case, as the outer diameter of the roll is smaller, the belt mesh fabric 4 forms an arc having a smaller radius of curvature, so that the crimp 9 exposed on the side surface of the cylinder roll has a minimum apex angle am of the top of the crimp exposed on the side surface of the canvas roll. It is smaller than the minimum value bm of the angles, and the maximum-minimum value difference ax-am of the apex angle of the crimp 9 is larger than the maximum-minimum value difference bx-bx of the apex angle of the crimp 10. That is, the crimp 9 exposed on the side surface of the cylinder roll has a greater degree of bending fatigue and is more likely to be broken earlier.

In view of the situation of the prior art as described above, the present invention provides a belt mesh which has high air permeability and antifouling property, can be easily washed, and has excellent wear resistance and durability against bending fatigue. The purpose is to provide textiles.

[0009]

The features of the present invention for solving the above-mentioned conventional problems and achieving the intended purpose are as follows.
At least a warp of the warp and the weft is made of a synthetic resin monofilament, and a mesh fabric for a belt is formed by weaving the warp and the weft for each weave in a plain weave structure. It has been woven.

A plurality of weft yarns may be arranged and woven every other weave of a plain weave design, and it is preferable that the weft yarns are synthetic resin monofilaments having a round cross section.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of a belt mesh fabric according to the present invention will be described with reference to FIGS.
The same parts as those in the above-mentioned conventional example are designated by the same reference numerals for description.

FIG. 1 is a plan view of a belt mesh fabric according to the present invention, and reference numeral 12 is a belt mesh fabric.

The belt mesh fabric 12 is composed of warp yarns 13,
13 and wefts 14, 14 are provided, and a plurality of wefts 14, 14 are arranged side by side every other weave and woven to form a mesh-like single-layer plain weave structure.
5 ... is formed wide.

The warp yarn 13 and the weft yarn 14 are formed of a monofilament having a round cross section with a synthetic resin such as polyester. The warp yarns 13 are woven and then subjected to heat treatment, and the long crimps 1 are formed according to the shape of the intersecting weft yarns.
6, 16 ..., 17, 17 ... and triangular crimps 18, 18 ...

As shown in FIG. 2, the long crimps 16 and 17 are exposed on the front surface side or the back surface side due to the intersecting state with the weft yarns 14 and are formed into a substantially trapezoidal shape or a bow shape having a large radius of curvature straddling the weft yarns. The apex angle of the part where the load due to bending acts is large and gentle.

Next, an example in which the belt mesh fabric 12 according to the present invention is used in the dryer canvas of the drying device shown in FIG. 7 will be described.

When the belt mesh fabric 12 is wound around a roll (cylinder roll) 2, as shown in FIG. 3, the long crimp 16 exposed on the surface on the cylinder roll side is exposed.
Then, by arranging the two wefts 14 and 14 in the longitudinal direction without a gap, the load due to the bending acting on the crimp 16 is dispersed, and the maximum value cx of the apex angle c at the place where the load acts is
In the long crimp 17 exposed on the surface opposite to the roll, which is larger than the maximum value ax of the apex angle a of the triangular crimp formed by intersecting with one weft shown in FIG. The load due to the bending that acts on the load is dispersed, and the minimum value dm of the apex angle d at the location where the load acts is
It becomes larger than the minimum value bm of the apex angle b of the triangular crimp formed by intersecting with one weft yarn shown in 0.

On the other hand, when the mesh fabric 12 for a belt is wound around a roll (canvas roll) 3 having a small outer shape, the long crimp 17 exposed on the canvas roll side surface becomes the long crimp 17, as shown in FIG. The maximum value dx of the apex angle d at the point where the load is dispersed due to the acting bending is distributed, and the maximum value bx of the apex angle b of the triangular crimp formed when intersecting with one weft shown in FIG. In the long crimp 16 exposed to the side opposite to the roll, the load due to the bending acting on the long crimp 16 is dispersed, and the minimum value of the apex angle c at the place where the load acts is cm.
Is larger than the minimum value am of the apex angle a of the triangular crimp formed when intersecting with one weft shown in FIG.

Further, the difference between the maximum value and the minimum value of the apex angles c and d, cx
-Cm, dx-dm are the apex angles a, of the triangular crimps formed when the single weft shown in FIGS.
It is smaller than the maximum-minimum value difference ax-am, bx-bm of b, and the load due to bending is reduced. Further, since the crimp shape is formed into a substantially trapezoidal shape, the contact area of the warp with the roller becomes wide and flat, so that the wear resistance of the warp is improved.

The triangular crimps 18 and 19 behave almost the same as the above-described conventional crimps 9 and 10.

Cylinder roll 2 and canvas roll 3
The crimps 16 and 18 exposed on the side surface of the cylinder roll have a larger load due to bending than the crimps 17 and 19 exposed on the side surface of the canvas roll due to the difference in outer diameter of the cylinder roll, and the crimp 16 and 18 are broken earlier than the crimp exposed on the side surface of the canvas roll. However, with the configuration of the present embodiment, as described above, the long crimp 16 is more durable than the triangular crimp 18, so that the long crimp 16 is exposed to the cylinder roll side. The warp that is used has better durability. Therefore, the adjacent warp yarns do not break at the same time, and it is possible to prevent an accident in which the belt mesh fabric that is caused by the adjacent warp yarns breaks at the same time and falls from the device.

In the above-described embodiment, an example in which a plurality of wefts are woven side by side every other weave of the plain weave design has been described. However, as shown in FIGS. It may be woven, or a plurality of weft threads may be used.

Further, in the above-mentioned embodiments, the example in which the mesh fabric for belt according to the present invention is used as the dryer canvas in the dryer (dryer part) of the paper machine has been described. It can be applied to conveyor belts and the like.

[0024]

As described above, in the belt mesh fabric according to the present invention, at least the warp and the weft are made of a synthetic resin monofilament, and the warp and the weft are interwoven for each weave to form a plain weave structure. In the mesh fabric for belts woven into the above, by weaving a plurality of the weft yarns side by side in the first weave, it is possible to suitably prevent the fibrillation phenomenon due to bending fatigue and improve the durability, so that the mesh structure is obtained. It has high air permeability and antifouling property, and can be easily washed even if it becomes dirty. Since the crimp shape is flat, wear resistance is improved.

Further, by arranging and weaving a plurality of wefts side by side every other weave of the plain weave design, adjacent warp yarns do not break at the same time, and adjacent warp yarns break at the same time. It is possible to prevent an accident that the mesh fabric falls from the device.

Since the weft yarn is a synthetic resin monofilament having a round cross section, the crimp shape can easily follow the shape of a roller or the like, and the cost of the monofilament round thread can be reduced. .

[Brief description of drawings]

FIG. 1 is a plan view showing an example of an embodiment of a belt mesh fabric according to the present invention.

FIG. 2 is a sectional view taken along line AA of the above.

FIG. 3 is a cross-sectional view showing a bent state of the above belt mesh fabric.

FIG. 4 is a cross-sectional view showing a bent state of the above belt mesh fabric.

FIG. 5 is a plan view showing another embodiment of the mesh fabric for belts according to the present invention.

FIG. 6 is a sectional view taken along line BB of the above.

FIG. 7: Drying device of conventional paper machine (dryer part)
FIG.

FIG. 8 is a plan view showing a conventional belt mesh fabric.

FIG. 9 is a sectional view taken along line CC of the above.

FIG. 10 is a cross-sectional view showing a bent state of the above belt mesh fabric.

FIG. 11 is a cross-sectional view showing a bent state of the above belt mesh fabric.

[Explanation of symbols]

1 Drying device (dryer part) 2 cylinder roll 3 canvas rolls 12 Belt mesh fabric 13 warp 14 Weft 15 open eyes 16 long crimp (cylinder roll side) 17 Long crimp (Canvas roll side) 18 triangular crimp (cylinder roll side) 19 Triangular crimp (Canvas roll side) a, b, c, d vertical angle

Claims (3)

[Claims] 1. A mesh fabric for a belt, wherein at least one of the warp and the weft is made of a synthetic resin monofilament, and the warp and the weft are interwoven into a plain weave structure, and the weft is one weave. A mesh fabric for belts, which is characterized by weaving multiple eyelets side by side. 2. The mesh fabric for a belt according to claim 1, wherein a plurality of weft yarns are arranged and woven every other weave of the plain weave structure. 3. The mesh fabric for a belt according to claim 1, wherein the weft is a synthetic resin monofilament having a round cross section.