JP2000103511A - Looplike belt - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high performance looplike belt suitable to a pressure contact belt for corrugated working using under an extremely severe condition, or a belt for using for application needing muffling, weighing aptitude, low friction, and surface smoothness, etc., even having simple structure. SOLUTION: This looplike belt is composed of a fabric 3 woven with a peripherally longitudinal direction string toward the peripherally longitudinal direction of a belt, and a width direction string 2 toward the width direction of the belt. The string 1 is closely woven also formed fusiformly in the surface and back views of the belt, and the fusiform swollen part (a) of the string 1 is actually contacted with the fusiform swollen part (a) of the string 1 adjoining every two intervals between. While the string 2 is sparsely woven to have structure actually disappearing on the surface in plane and back views of the belt.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a pressure contact belt for corrugating used under extremely severe conditions, and a belt used in applications requiring noise reduction, suitability for weighing, low friction, surface smoothness, etc. It relates to a suitable high-performance loop belt.

[0002]

2. Description of the Related Art <Loop-shaped belt> Generally, an endless belt or a seamless belt is produced by plain weaving using a warp (tateito) and a weft (yokoito). In the case of endless belts, after obtaining a long flat woven fabric, both ends are joined to form a loop,
The warp running direction during weaving is the circumferential direction of the belt. On the other hand, in a seamless belt, a double woven fabric (tubular woven fabric) in which upper and lower woven fabrics are connected at both ends is typically obtained by a bag weaving method, and then cut in the radial direction to form a loop. Therefore, the weft running direction during weaving is the circumferential direction of the belt.

[0003] There is a difference between the running direction of the warp during weaving and the running direction of the weft during weaving. Schematically shows a plan view in (a) of FIG.
The cross section is shown in (b), and both the warp and the weft appear on both the front surface and the back surface.

<Pressing Belt in Corrugating> When manufacturing corrugated cardboard by corrugating, the core is fed to a pair of corrugating rolls that mesh with each other, and the corrugating is performed.
A press roll method is widely used in which the stepped core is glued to the crest portion and the liner is abutted and pressed by a press roll for lamination. Press the belt against the roll,
A press-contact belt system in which a liner is fed from above a stepped core between these step rolls and the belt to bond them together has attracted attention.

Japanese Patent Application Laid-Open No. 7-60877 discloses a belt mainly used in a pressure contact belt system.
Uses a seamless endless canvas core in both the longitudinal and width directions of the belt, and has a heat-resistant elastomer layer on the surface side, and the surface is coated with a coating layer with excellent release properties. A wide belt having a structure in which skins having the following structure are laminated is shown. The layer configuration at this time is “coating layer / skin fabric having elasticity in the belt longitudinal direction / heat-resistant elastomer layer / canvas core body seamless in both longitudinal and width directions of the belt”.

[0006] Although there is no mention of corrugating, for example, Japanese Unexamined Utility Model Publication No. Hei 6-63536 discloses a conveyor belt used in a paper feeding process.
A heat-resistant fiber base material is impregnated with fluororesin, dried and sintered, and a reinforcing layer formed on this reinforcing layer and a base fabric knitted with heat-resistant fibers is impregnated with fluororesin, dried, sintered and stretched. A heat-resistant laminated conveyor belt having a wear-resistant layer provided with a property is shown. There is also a description that the heat-resistant fiber of the wear-resistant layer may be a nonwoven fabric made of corrugated or spring-like expanded and contracted short fibers.

[0007]

In a food or pharmaceutical factory, weighing may be performed while an article to be conveyed is running on a conveyor belt, and at this time, there is no vibration during traveling of the belt. Is required. Further, for example, in a semiconductor factory, it is required that no noise is generated due to belt running during inspection. However, a general belt showing the structure of the woven fabric in FIGS.
Since both warp and weft yarns appear on the front and back sides, when driving the belt, fine vibrations or poor noise reduction may occur depending on the belt tension, the weight applied to the belt, etc. May cause trouble. Further, when a conveyed material on the belt is temporarily retained by a bar, the belt may vibrate or the conveyed material may move due to poor slippage. As described above, the general belts shown in FIGS. 4A and 4B with the structure of the woven fabric are:
It is not necessarily suitable as a belt used for applications requiring noise reduction, suitability for weighing, low friction, surface smoothness, and the like.

Further, as a pressure contact belt for corrugating, a pressure contact belt having a multilayer structure as mentioned above has been proposed, but there are circumstances in which pressure contact belts for corrugation are used under extremely severe conditions. That is, this pressure contact belt is used in a high-temperature environment, is used for high-speed running, applies an extremely large tensile force, vibrates greatly, and the pressure contact object has irregularities, and the width of the sheet to be processed is larger than that of the step roll. When the belt is narrow, both sides of the press-contact belt are in direct contact with the step roll, and furthermore, the posture of the belt is frequently controlled in conjunction with a sensor so that the press-contact belt does not meander. Thus, a force is exerted on the pressing belt.
For this reason, the pressure contact belt proposed above has a complicated multilayer structure to withstand such severe conditions, but delamination, wavy wrinkles in the width direction of the belt, misalignment, etc. There are disadvantages that they are likely to occur and the life is short, and the cost is considerably high due to the complicated structure.

Under such a background, the present invention provides a pressure-contact belt for corrugating, which has a simple structure but is used under extremely severe conditions, and has a sound-deadening property, a weighing suitability, a low friction property, and a surface. It is an object of the present invention to provide a high-performance loop belt suitable for a belt used for applications requiring smoothness and the like.

[0010]

The loop belt according to the present invention is woven with a circumferential direction yarn (1) directed in the belt circumferential direction and a width direction yarn (2) directed in the belt width direction. Woven cloth
(3) a loop-shaped belt comprising:
(1) is densely woven and its circumferential direction yarn (1)
Is the spindle shape of the belt when viewed from the front and the back, and the spindle-shaped bulge (a) of the spindle-shaped bulge (a) of the spindle-shaped yarn (1) is adjacent to one another. The width direction yarn (2) is sparsely woven and does not substantially appear on the front surface in plan view and the back surface view of the belt. It has a structure.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.

The loop-shaped belt of the present invention comprises a woven fabric (3) woven from a circumferential direction yarn (1) heading in the belt circumferential direction and a width direction yarn (2) heading in the belt width direction. Become.

The loop belt is preferably seamless, and such a seamless belt can be obtained by several methods as described below.

A typical one is a method of weaving by a weaving method using a warp and a weft. Bag weaving is a method of arranging warp into front warp and back warp, and forming a single ring by reciprocating the weft two times to form a tubular shape sequentially. Done. When the bag weaving method is adopted, the warp during weaving becomes a running yarn in the width direction of the seamless woven fabric, and the weft during weaving becomes a running yarn in the circumferential direction (radial direction) of the seamless woven fabric. If the obtained tubular bag fabric is cut in the radial direction as required, a seamless woven fabric having a desired size can be obtained.

A seamless woven fabric can also be manufactured by weft-inserting a width-direction running yarn into a circumferentially-running yarn that has been warped in a skein shape in advance. In the last stage of weaving, it is difficult to make an opening, so that weaving may be completed at the end by hand if necessary.

Further, a seamless woven fabric can also be obtained by weaving in a circular room. In the circular room, the warp runs in a cylindrical shape in the vertical direction, and the weft is inserted in a circular manner.

Circumferential direction yarn (1) heading in the circumferential direction of the belt
The width direction yarn (2) heading in the width direction of the belt includes synthetic fiber yarns such as polyester and polyamide, natural fiber yarns, metal fiber yarns, shape memory alloy yarns, ceramic fiber yarns, glass fiber yarns, and carbon fibers. These are optional, including yarns, such as monofilament yarns, multifilament yarns, spun yarns, woolen yarns (fluffs obtained by cutting filaments into appropriate lengths and twisting them), covering yarns, film slit yarns And split fiber yarns.

When a pressure contact belt for corrugating is obtained, heat-resistant and high-strength fiber yarns, for example, aramid (aromatic polyamide) fiber yarn, polyetheretherketone fiber yarn, polyamideimide fiber yarn, polyparaphenylenebenzobis fiber are used. Oxazole fiber yarns, polyimide fiber yarns, metal fiber yarns and the like are particularly suitable. Heat resistant high strength fiber yarn
Literally, an appropriate material is selected from the viewpoint of heat resistance and high strength. Heat resistant high strength fiber yarn
An appropriate number of wires are aligned or twisted, and if necessary, re-aligned or re-twisted, and are often used as a cord having an appropriate thickness of several hundred denier to several thousand denier.

In the stage of yarn, the stage of the woven fabric (3) after weaving, or the stage of forming into a belt, treatment with a resin can be carried out. At this time, various resins such as a fluorine-based resin and polyurethane can be used. For example, when obtaining a pressure contact belt for corrugating or a belt requiring non-adhesiveness, impregnation or impregnation with a fluorine resin at the yarn stage, the woven fabric (3) stage after weaving, or the stage of forming the belt. Coating can be performed. When a fluorine-based resin such as polytetrafluoroethylene (PTFE) can be fired, firing is preferably performed.

Depending on the use of the belt, a resin which can be melted at the yarn stage may be coated and heated as a woven fabric or belt to fill the mesh of the woven fabric.
Further, it is also possible to use a material obtained by covering a raw tape yarn of PTFE, for example, as a core yarn and heat and bake the raw tape yarn after forming a woven fabric or a belt.

In the circumferential direction yarn (1) of the woven fabric (3) directed in the circumferential direction of the belt, the S-twisted cord and the Z-burning cord are arranged in a well-balanced manner to prevent the belt from meandering. be able to. To arrange in a well-balanced manner, for example,
Arrangement like ZSZSZ, SSZZSSZZ ...
・ There are various other variations.

In particular, when trying to obtain a wide-width woven fabric (3), an ordinary loom may not be able to cope. In such a case, a magnet or a magnetic body is attached to the reciprocable belt, and a magnet or a magnetic body is also attached to the weft holding body so that the magnets or the magnet and the magnetic body attract each other while the weft is being drawn. The holding body can be made to run. In this way, an extremely wide woven fabric can be woven. As the weft holding body at this time, the weft may be mounted on a bogie as a hollow wound body without a core, and the weft may be fed out from the hollow of the hollow wound body.

In the present invention, the circumferential direction yarn (1)
Is densely woven, the circumferential yarn (1) has a spindle shape when viewed from the front and back of the belt, and the spindle-shaped bulge (a) of the circumferential yarn (1) is Substantially in contact with the spindle-shaped bulge (a) of one adjacent circumferential length yarn (1), while the widthwise yarn (2) is sparsely woven. The belt has a structure that does not substantially appear on the front surface in plan and rear views. At first glance, this structure imagines the weaving of the tatami mat. A feature of the present invention is that the belt is formed by using the woven fabric (3) having such a special weaving method.

FIG. 1 schematically shows the structure of the woven fabric (3) having the above structure. FIG. 1 (a) is a plan view and FIG. 1 (b) is a cross-sectional view. However, in order to avoid complexity of the drawing, only a part of the yarn is shown in a non-twisted state). Only the perimeter-direction yarn (1) appears on the front and back surfaces, and the width-direction yarn (2) is completely invisible or practically invisible from the front surface and the back surface. This is the adjacent circumferential direction yarn with one spindle-shaped bulge (a) of the circumferential direction yarn (1).
Since it is in contact with the spindle-shaped bulge portion (a) of (1), the width direction yarn (2) cannot be seen. (B) is a spindle-shaped point. In FIG. 1, since the length of the spindle shape is long, two width-direction yarns (2), one each on the left and right sides, are located on one spindle-shaped portion, as shown in FIG. When the spindle-shaped length is short, one width-direction yarn (2) may be positioned for one spindle-shaped portion.

In order to make such a structure more reliable, the density per unit length of the circumferential direction yarn (1) constituting the woven fabric (3) is d ₁ , and the unit length of the width direction yarn (2) is When the density per contact is d ₂ , d ₁ ≧ 2.5 · d ₂ , preferably d ₁ ≧ 2.7 · d
₂ , and more preferably, d ₁ ≧ 3.0 · d ₂ . Although the upper limit of d ₁ is not limited, it is usually up to about 100 times, especially up to about 50 times d ₂ .

Further layers can be added to the loop belt of the present invention, if necessary. Examples of other layers are
Examples include a tetrafluoroethylene-perfluoroalkyl vinyl ether copolymer, a tetrafluoroethylene-hexafluoropropylene copolymer, and polyurethane.
Even when another layer is added to the front surface or the back surface, in the present invention, only the circumferential direction yarn (1) appears on the surface of the base fabric and becomes smooth, so that the smoothness of the belt is maintained.

The loop belt of the present invention is a pressure contact belt for corrugating, that is, a belt for pressing a sheet to be processed on a step roll in corrugating, and more specifically, a liner is laminated on a stepped core. It is particularly useful as a belt for carrying out. The dimensions of the pressure contact belt at this time vary depending on the dimensions of the corrugator step rolls and the space between the rolls.
In many cases, the length is about 3000 mm and the circumference is about 2000 mm or more.

Further, the loop-shaped belt of the present invention has
It is also useful as various belts that require weighing suitability, low friction properties, surface smoothness, and the like.

<Operation> In the loop belt of the present invention having the above structure, the circumferential length yarn (1) is densely woven and the width direction yarn (1) is woven.
(2) is sparsely woven, only the perimeter-direction yarn (1) appears on the front and back sides, and the width-direction yarn (2) is completely invisible or practically invisible from the front surface and the back surface. Since the width direction yarn (2) is sparsely woven, the circumferential direction yarn (1) can be densely woven, and as a result, the spindle-shaped bulge portion (a) of the circumferential direction yarn (1) is reduced. Spindle-shaped bulge (a) of one circumferentially adjacent yarn (1)
It can be said that the contact can be made substantially between. And since the loop-shaped belt of the present invention has such a structure, the belt runs smoothly, and preferable silencing properties, weighing suitability, low friction properties, and surface smoothness are obtained.
Even if the belt is strongly pressed or the belt is frequently changed by posture control, even if a force is applied, the belt smoothly follows the force, and troubles such as wrinkling and misalignment hardly occur.

[0030]

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

Embodiment 1 FIG. 2 is a front view schematically showing an example when the loop belt of the present invention is a pressure belt. The back view also appears the same as the front view. FIG. 5 is a schematic view showing an example of a corrugator for manufacturing corrugated cardboard.

The warp yarns (to be the width direction yarns (2) of the pressure contact belt) and the weft yarns (the circumferential direction yarns of the pressure contact belt) during bag weaving
(1) The non-twisted yarn obtained by combining the aramid fiber yarns was further reduced by a predetermined number, and impregnated with a dispersion of polytetrafluoroethylene in a cord having a thickness of 6000d / 7000f, followed by drying only. Was used.

Using this warp and weft, a wide tubular seamless woven fabric was woven by a bag weaving method. The number of cords to be driven is the width direction yarn (2), which is the warp during weaving,
1 / 10mm, circumference direction yarn (1) which is the weft at the time of weaving is 6
Book / 10 mm. Subsequently, the operation of impregnating the woven fabric after weaving with the dispersion of polytetrafluoroethylene and firing at a temperature of 350 to 400 ° C. was repeated several times.

The seamless woven fabric thus obtained
(3) was cut into a predetermined width in the radial direction, and the ends of both ears were frayed if necessary, to obtain a pressure contact belt for corrugating. This press contact belt was extremely tough against pulling, had high heat resistance, and had a non-adhesive surface and abrasion resistance.

This press-contact belt is used as a press-contact belt (press-contact belt for bonding a liner from above the step-processed core) to press the sheet to be processed on the step roll during corrugating, as shown in FIG. When the corrugated board was manufactured in this way, it was possible to perform smooth crimping, and also to remove the interface between the woven fabrics (3) and the cords that make up the woven fabric (3) due to the vibration and lateral stress applied during corrugating No troubles such as cracks, wrinkles or misalignment occurred over a long period of time, and the service life of the belt was much longer than that of a press-contact belt used in the market.

Embodiment 2 FIG. 3 is a front view schematically showing another example when the loop belt of the present invention is a pressure contact belt. The back view is the same as the front view.

Warp yarns (to be the width direction yarns (2) of the pressure contact belt) and weft yarns (the circumferential direction yarns of the pressure contact belt) during weaving and weaving
(1)) A non-twisted yarn obtained by combining aramid fiber yarns is further twisted by a predetermined number of twists, and further twisted by a predetermined number of twists into a cord having a thickness of 2000 d, and a polytetrafluoroethylene disperser. It was impregnated with John and only dried.

Using the warp and the weft, a wide tubular seamless woven fabric was woven by a bag weaving method. The number of cords to be driven is the width direction yarn (2), which is the warp during weaving,
3 / 10mm, 1 perimeter direction weaving yarn (1) during weaving
4 lines / 10 mm. Subsequently, the operation of impregnating the woven fabric after weaving with the dispersion of polytetrafluoroethylene and firing at a temperature of 350 to 400 ° C. was repeated several times.

The seamless woven fabric thus obtained
The pressure contact belt obtained by cutting (3) to a predetermined width in the radial direction
It was extremely tough against pulling, had high heat resistance, and had a non-adhesive surface and abrasion resistance. This pressure contact belt also had excellent performance similar to that of Example 1.

Example 3 Using the warp and weft of Example 2, a wide tubular seamless woven fabric was woven by a bag weaving method. However, the weft was used for weft insertion using two S-twisted and Z-twisted cords. The number of cords to be driven was such that the width direction yarn (2) as a warp yarn during weaving was 3/10 mm, and the circumferential direction yarn (1) as a weft during weaving was 14/10 mm.

Example 4 Using polyester multifilament yarns as the warp and the weft, an ultrawide woven fabric (3) having the structure shown in FIG. 3 was woven by a bag weaving method, and a polyurethane film was laminated on both front and back surfaces. At the time of weaving, a magnet is attached to a reciprocable belt, and the weft is placed on a bogie with magnets as a hollow wound body without a core, and the weft is reciprocated while being fed out of the hollow hollow body. Were inserted.

Example 5 Weaving was performed in the same manner as in Example 1 except that weaving was performed in a circular room. In this case, the same good results as in Example 1 were obtained.

[0043]

As described in the section of operation, in the loop belt according to the present invention, the circumferential direction yarn (1) is densely woven, the width direction yarn (2) is sparsely woven, and is woven on both sides. Is the circumferential direction thread (1)
Only, and the width direction yarn (2) is completely invisible or practically invisible from both the front and back sides, so that the belt runs smoothly, and favorable silencing properties, weighing suitability, low friction properties, and surface smoothness are obtained. Even if the belt is strongly pressed or the belt is frequently changed by posture control, even if force is applied, it smoothly follows it, and it is hard to cause troubles such as wrinkles and misalignment, extremely high performance It is. Further, since the loop belt of the present invention has a simple structure, it is advantageous in terms of manufacturing cost.

[Brief description of the drawings]

FIG. 1 schematically shows the structure of a woven fabric (3) constituting a loop belt of the present invention, wherein (a) is a plan view,
(B) is a sectional view.

FIG. 2 is a front view schematically showing an example when the loop belt of the present invention is a pressure belt.

FIG. 3 is a front view schematically showing another example when the loop belt of the present invention is a pressure belt.

4A and 4B schematically show the structure of a woven fabric constituting a conventional belt. FIG. 4A is a plan view, and FIG. 4B is a cross-sectional view.

FIG. 5 is a schematic view showing an example of a corrugator for producing cardboard.

[Explanation of symbols]

 (1) ... Perimeter direction thread, (2) ... Width direction thread, (3) ... Woven cloth, (a) ... Spindle-shaped bulge, (b) ... Spindle-shaped tip

Claims (7)

[Claims] Circumferential direction yarn (1) heading in the circumferential direction of the belt
And a woven fabric (3) woven with a width direction yarn (2) extending in the width direction of the belt, wherein the circumferential direction yarn (1) is densely woven, The circumferential direction yarn (1) has a spindle shape when viewed from the front and back of the belt, and the spindle-shaped bulge of the circumferential direction yarn (1).
(a) is substantially in contact with the spindle-shaped bulge (a) of the adjacent circumferentially-oriented yarn (1), while the widthwise yarn (2) is loosely sparse. A loop-shaped belt, which is woven and has a structure that does not substantially appear on the front surface in plan and rear views of the belt. 2. A case where the density per unit length of the circumferential direction yarn (1) constituting the woven fabric (3) is d ₁ and the density per unit length of the width direction yarn (2) is d _{2. 2.} The loop-shaped belt according to claim ₁ , wherein d ₁ ≧ 2.5 · d ₂ . 3. The loop belt according to claim 1, wherein the woven fabric is a seamless woven fabric. 4. The loop belt according to claim 1, wherein a treatment with a resin is performed at a yarn stage, a stage of the woven fabric (3) after weaving, or a stage of forming the belt. 5. The loop belt according to claim 1, wherein the circumferential direction yarn (1) is a non-twist yarn or a twist yarn. 6. The loop belt according to claim 1, which is a pressure contact belt for corrugating. 7. The loop belt according to claim 1, wherein the belt is used for applications requiring silence, suitability for weighing, low friction or surface smoothness.