JP2510458B2 - Wide belt canvas core - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a canvas core for a wide belt, and more particularly to a canvas core for a wide belt which is used by being incorporated in a part of a corrugating machine in a corrugated paperboard production line.

[0002]

2. Description of the Related Art A wide belt using a canvas core according to the present invention has a width of 2700 mm. Circumference of 3000 mm,
The belt is extremely thin with a thickness of 4.5 mm and has a wide and unique shape. As a specific field of use of the wide belt having the unique shape, the wide belt is incorporated and used as a component of a corrugated paperboard manufacturing apparatus. A specific example of the belt is Japanese Patent Application No. -199220
It is proposed in the issue.

In the conventional corrugated paperboard manufacturing apparatus, high temperature steam is fed into the inside of the corrugated paperboard, the surface of the corrugated paperboard is heated, and the corrugated core paper is corrugated into a corrugated core paper. Starch paste is applied, and the core paper and liner paper after corrugation with the paste are sent to a crimping device that is a combination of heat-resistant belts, rollers, felts, etc., on another rear line, and the core paper Work to attach paper and liner paper is performed. However, in the conventional corrugated paperboard manufacturing means, the work efficiency is largely reduced by first adopting the patterning step, the subsequent sticking step, the molding step and the multi-step step.

After that, for the purpose of simplifying the mechanism and increasing the efficiency of the work, a corrugating process of corrugating with a pair of corrugating tooth rolls, the tooth rolls, and a wide belt arranged so as to be in contact with the corrugating rolls are provided. A corrugated paperboard manufacturing apparatus has been proposed which is capable of accomplishing a series of the work of patterning core paper by combining and sticking with liner paper in an integrated manner.

That is, the improved corrugated paperboard manufacturing apparatus (21) has a core paper (23) between a pair of meshing tooth type rolls (22A) (22B), as shown in FIG. Is sent, both rolls (22A) (22B)
In the process of meshing, the corrugated paper is applied to the core paper (23), and starch paste is applied to the top of the corrugated core paper (23) by the adhesive applicator (24). A heating device (not shown) for vaporizing moisture impregnated in the corrugated paperboard and performing accurate patterning on the tooth roll (22B) surface on the side where the glue applying device (24) is attached. Endless belt mechanism (25) for pressure application, that is, a part of a wide belt (A) suspended between a pair of drum-shaped pulleys (26) (26) is arranged so as to be capable of pressure contact while maintaining an arc-shaped contact area. Has been done. Liner paper (27) fed between the wide belt (A) and the tooth type roll (22B)
Is wound around a part of the surface of the tooth mold roll (22B) and is moving,
The corrugated paper (28) is completed by stacking the glued core paper (23A) and pressure-bonding it between the wide belt (A) and the tooth type roll (22B).

[0006]

The pressure belt used in this type of apparatus is in constant pressure contact with the tooth portion of the tooth type roll, is placed in a high temperature environment, and the object to be manufactured is a corrugated cardboard paper having a wide width. Therefore, the wide belt itself is required to withstand the load in the belt width direction. A wide belt having a wide shape and a small thickness has a peculiar shape, and when the rigidity in the belt width direction is insufficient, wrinkles occur during belt running, which also contributes to belt meandering. Therefore, conventionally, a steel belt is widely used as the wide belt for pressure application. However, this wide steel belt is expensive,
In addition, in the event of an unexpected belt cutting accident, personal injury, large-scale damage to incidental equipment, and adoption of steel belts, the entire equipment becomes larger, and steel belts have unique problems in terms of bending fatigue resistance. As described above, the corrugated paperboard making machine partially using the wide steel belt has not been sufficiently satisfactory in terms of work efficiency as the line speed is increased.

Conventionally, wide belts used in various industrial fields have been subjected to vulcanization endlessness at both ends of the wide belt before being mounted on a mechanical device. However, when this endless wide belt is used with high tension in a high temperature environment, peeling or cutting phenomenon occurs at this joint, and the presence of a step remaining at this joint causes Could be a major obstacle to the smooth performance of various tasks in Japan. As an improvement of this wide belt,
A wide belt using a seamless canvas core having a weaving part woven by a bag weaving machine is also proposed, but in the weaving part of the canvas core, under the same severe use conditions as above. , I saw the belt cutting relatively early.

The present invention can sufficiently cope with the severe environment and conditions of the corrugated paperboard manufacturing apparatus and the like, adapt to the high speed running of the belt accompanying the efficiency improvement of the work, and reduce the noise of the equipment. With a canvas core that is a central member of this wide belt that can also contribute to the belt, it maintains sufficient rigidity in the belt width direction, has a small elongation, and prevents the belt from twisting or meandering. An object of the present invention is to provide a canvas core for a wide belt in which no unevenness is generated in the circumferential direction and the density of the belt canvas core can be reduced so that uniform work can be achieved at various places of the belt.

[0009]

In order to achieve the above object, the canvas core for a wide belt according to the present invention has the following structure. The canvas core that constitutes a part of the wide belt has a seamless tubular shape in both the circumferential and width directions by a single circular loom capable of covering the entire width of the belt or a loom having equivalent performance. The number of cords arranged in the circumferential direction and the width direction, that is, the cord density is 10 to 50 cords per 5 cm, and the variation in the number of cords is ± over the entire length and width of the canvas core.
It is characterized by being woven within 0.5.

[0010]

EXAMPLES Specific examples of a wide belt canvas core according to the present invention will be described with reference to the drawings. This canvas core can be used for a wide belt that constitutes one member of a corrugated paperboard manufacturing apparatus, and can exhibit particularly remarkable effects. FIG. 1 is a perspective view of a wide belt canvas core body according to the present invention, and FIG. 2 is a partially enlarged end view of the core body.

In FIG. 1 constituting this canvas core body (1), a vertical cord (2) and a canvas core arranged in the arrow direction of the white background are arranged in the direction of the black arrow and are aligned with the circumferential direction of the canvas core body. The transverse cords (3) that match the width direction of the body are both low-elongation and high-strength fiber cords, specifically composed of aromatic polyamide fibers (also known as aramid fibers) or polyetheretherketone fibers, and of circular type. The canvas core (1) woven in a tubular shape and woven endlessly by a weaving machine or a weaving machine having a weaving performance equivalent to this has a seamless shape with no step in the circumferential direction and the width direction. .

The canvas core (1) is a plain weave having cords formed by aligning or twisting long filaments of the above-mentioned fibers and twisting 1000 to 2000 denier yarns each, and further twisting 2 to 10 yarns. Woven with mat weave, twill weave or satin weave. The number of twists of the yarn having a fineness of 1000 to 2000 denier per cord of the canvas core is 50 times / m to 100 times /
m. And the vertical cords (2) that make up the canvas core
And the number of horizontal cords (3), that is, the cord density is 5
The number of cords is 10 to 50 per cm, and the variation in the number of cords at this time is within ± 0.5 over the entire width and the entire length of the canvas core body, which causes a local excessive elongation phenomenon of the belt itself. It is suppressed and prevents the worst situation of early cutting due to belt stress concentration.

A canvas core capable of withstanding a load in the belt running direction during severe work such as corrugated paper production has a canvas strength of 600 kgf or more per 1 cm of the core width and a canvas core longitudinal elastic modulus in the running direction of the wide belt. In the temperature range of 23 ° C. to 150 ° C., 8000 kgf or more per 1 cm width of the canvas core is required.

Further, in order to withstand the above-mentioned load and to suppress the expansion of the wide belt and to cope with the work under severe conditions such as the production of corrugated cardboard, the creep elongation of the canvas core is 50 kgf per cm of the canvas core width. Under the load of, the numerical value of 2.5% or less at 23 ° C. and 4.0% or less at 150 ° C. must be secured. In order to prevent the wide belt from twisting or wrinkling during running, maintain the transverse elastic modulus of the canvas core body at 0.7 to 1.5 times the longitudinal elastic modulus of the canvas, which is sufficient for the wide belt. It is necessary to secure the lateral rigidity of. In addition, the meandering phenomenon that occurs when the wide belt is running is
Regarding the cord twisting direction of the vertical direction that constitutes the canvas core,
By alternately combining the S-direction twist and the Z-direction twist for each longitudinal cord (2), it is possible to suppress the meandering running of the belt.

Next, a wide belt using the tubular seamless canvas core (1) described above, particularly a wide belt incorporated as a component of a corrugated paperboard manufacturing apparatus, will be described as an example. FIG. 3 is a perspective view of a part of a wide belt using a wide canvas core, and FIG. 4 is a partially enlarged end view of the belt. This wide belt is as described in Table 1 below.
Width 2700mm, length 3000mm, wall thickness 4.5mm
And, it is a wide and extremely thin belt. On the surface side of the canvas core body (1), a heat resistant elastomer layer such as hydrogenated nitrile rubber (HN) is used as a front cover elastic layer (11).
BR), a synthetic resin layer made of polytetrafluoroethylene (PTFE) or a synthetic rubber such as ethylene propylene rubber (EPR) or the like, and if necessary, the elastic layer (11) for the cover has durability and rigidity. Excellent length 2-2
Short fibers (12) of 0 mm, for example, aromatic polyamide short fibers (aramid short fibers) are synthetic rubber or synthetic resin 100.
It may be embedded at a ratio of 5 to 30 parts by weight with respect to the parts by weight while maintaining orientation in the belt width direction and ensuring rigidity in the belt width direction.

On the other hand, if necessary, the back cover elastic layer (13) made of synthetic rubber or synthetic resin forming the front cover elastic layer, which is laminated on the back side of the canvas core (1), is heated as necessary. The conductive powder-granular member (14) is mixed and embedded with, for example, carbon black or metal powder in a proportion of 40 to 70 parts by weight with respect to 100 parts by weight of synthetic rubber or synthetic resin, and the thermal conductivity of the wide belt itself is improved. Can be one.

The wide belt (10) having the above-described structure has a belt wound around drum-shaped pulleys (26) (26) equipped with a pair of heating devices, as schematically shown in FIG. The water impregnated in place of (A) and impregnated into the constituent material of the corrugated paperboard is subjected to vaporization through a pulley and a wide belt (10) reaching about 160 ° C., in the process of vaporization, Adhesion progresses.

A wide belt manufactured with the above-described basic structure, that is, a thickness of 4.5 mm and a thickness of 2.0 m using a circular type seamless canvas core
m Example belts (A) and (C), corresponding to which a wall thickness of 4.5 using a woven-back type seamless canvas core
mm wide and thickness 2.0 mm comparative example belts (B) and (D) four kinds of wide belts, belt elongation during continuous running for 7 days, presence or absence of belt cutting, belt twisting, and belt meandering A running test was conducted and the results shown in Table 3 below were obtained. Table 1 below shows the belt constituent parts of the various belts excluding the canvas core, Table 2 shows the constituent parts of the canvas core, and Table 3 shows the running results of the various belts.

[0019]

[Table 1]

[0020]

[Table 2]

[0021]

[Table 3]

A wide belt using a seamless canvas core woven by a bag weaving machine having an ordinary weaving portion as one component of the belt (Comparative Example (B) in Table 2 above).
The belt (D) is required to be able to run under a load of 100 kgf / cm without any abnormality. However, when the wide belt has a load of 40 kgf / cm or more, it can be stretched in the longitudinal direction and the lateral direction at the weaving portion. Due to the large variation in the cord density, stress was concentrated in this portion, and as a result, the worst situation of occurrence of local excessive elongation of the wide belt or cutting of the belt was observed. However, the wide belt according to the present invention in which the variation in the cord density in the longitudinal direction and the transverse direction is within ± 0.5 per 5 cm over the entire width and the entire length of the canvas core (the embodiment in Table 2 (A (C) Belt), the occurrence of the abnormal phenomenon could be suppressed for a long period of time.

[0023]

EFFECTS OF THE INVENTION In a wide and thin-walled belt using the canvas core according to the present invention, the strength of the belt itself and the rigidity in the width direction of the belt are the cores of the canvas that form the belt. I have no choice but to rely entirely on. The canvas core according to the present invention has a tubular overall shape formed by a circular loom, uses aromatic polyamide fiber or polyether ether ketone fiber as the constituent cord of the canvas core, and makes the density of the longitudinal and lateral cords dense. In addition, by increasing the lateral elastic modulus of the canvas core by woven fabric with high density with little variation in each place, the rigidity in the belt width direction is increased along with the strength.
As a result, it is possible to prevent the belt from twisting or wrinkling, which is one of the causes of the meandering running of the belt, and at the same time, to suppress the occurrence of a fatal situation such as belt cutting for a long period of time.

Further, the density of the longitudinal and transverse cords of the belt is dense at 10 to 50 cords per 5 cm, and the variation in the number of cords is finely woven within ± 0.5 cords over the entire width and the entire length. By using, the work is carried out directly on the wide belt used as a component of the corrugated paperboard manufacturing equipment, and even when it is used in a harsh environment, the expansion of the belt itself Deformation can be suppressed, accurate work can be continuously performed on the belt for a long time, and the durability of the belt can be secured for a long time.

[Brief description of drawings]

FIG. 1 is a perspective view of a canvas core body for wide belts according to the present invention.

FIG. 2 is an enlarged end view of a part of the concentric body.

FIG. 3 is a perspective view of a part of a wide belt using a canvas core.

FIG. 4 is an enlarged end view of a part of the belt.

FIG. 5 is a schematic front view of a corrugated paperboard manufacturing apparatus incorporating a wide belt.

[Explanation of symbols]

 1 Canvas core 2 Vertical cord 3 Horizontal cord

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Sakae City 5-5-6-406, Suganodai, Suma-ku, Kobe City (72) Inventor Kazutoshi Fujishiro 679-2 Shikatamachibata, Kakogawa City, Hyogo Prefecture (72) Inventor Sakurai Nobuo 4-16 Kasugadai, Nishi-ku, Kobe-10-10 (56) References JP-A 1-256416 (JP, A) JP-A 6-48530 (JP, A) SAI 62-13946 (JP, U) Actual development Sho 58-131211 (JP, U)

Claims (10)

(57) [Claims] 1. A canvas core, which is a component of a wide belt, is a tubular loom that can cover the entire width of the belt and is seamless in both the circumferential and width directions by a circular loom or a loom having the same performance. And the density of the number of cords arranged in the circumferential direction and the width direction is 1 per 5 cm.
A canvas core for a wide belt, characterized in that the number of cords is 0 to 50 and the variation in the number of cords is woven within ± 0.5 over the entire width and the entire length. 2. The canvas core body for a wide belt according to claim 1, wherein the strength of the canvas core body is set to 600 kgf or more per cm width of the canvas core body. 3. The creep elongation of the canvas core is 1 width of the canvas core.
2.5 at 23 ° C under a load of 50 kgf per cm
% Or less and 4.0% or less at 150 ° C. 3. The wide belt canvas core body according to claim 1 or 2. 4. The longitudinal elastic modulus of the canvas core is 23 ° C. to 150 ° C.
8,000 per 1 cm width of canvas core in the temperature range of ℃
The canvas core body for a wide belt according to any one of claims 1 to 3, which is set to be kgf or more. 5. The ratio of the longitudinal elastic modulus of the canvas core (circumferential direction of the canvas core) to the transverse elastic modulus of the canvas core is set in the range of 0.7 to 1.5. One of
The canvas core for a wide belt according to the item. 6. Longitudinal and transverse cords are drawn from filament filaments.
Thickened or twisted to have a fineness of 1000-2
The wide belt canvas core according to any one of claims 1 to 5, further comprising twisting 2 to 10 yarns having a denier of 000. 7. The number of twists of the yarn having a fineness of 1000 to 2000 denier per filament constituting the longitudinal and transverse cords is 50 times / m to 100 times / m. Among them, the canvas core body for a wide belt according to any one of items. 8. The wide belt according to any one of claims 1 to 7, wherein the twisting direction of the vertical cords constituting the canvas core is alternately alternating the S direction and the Z direction for each cord. Canvas core. 9. The wide belt canvas according to claim 1, wherein the longitudinal and transverse cords constituting the canvas core are composed of aromatic polyamide fiber or polyether ether ketone fiber. Core body. 10. The weave design of the canvas core body is plain weave, twill weave,
The wide belt canvas core body according to any one of claims 1 to 9, which is woven with one of a satin weave and a mat weave.