JP2849338B2 - Thin flat belt for transporting paper sheets - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin flat belt used in a paper sheet conveying device, and more particularly, to a method for preventing warpage, which is a problem of a thin flat belt, and forming a belt between the belt and the paper sheet. The present invention relates to a thin flat belt for transporting paper sheets which stabilizes frictional force and can transport paper sheets reliably and accurately.

[0002]

2. Description of the Related Art A belt used for conveying paper sheets is as follows.
Such as a belt for conveying the ticket belt and automatic break current label machine for conveying the banknotes vending machines and the like, the belt used in these <br/> applications have flat belt thin.

These flat belts have a structure in which, for example, a core body as shown in FIG. 4 is embedded in an elastomer, and a woven fabric is arranged below the belt (see Japanese Utility Model Application Laid-Open No. 62-20 / 1987).
No. 4058), a belt having a structure in which a canvas for preventing longitudinal cracks is laminated on the upper surface of a main body made of an elastomer,
A member made of a different material, such as a belt with a structure in which a conductive material is mixed in the upper layer to prevent static electricity, and the lower layer is made of a normal elastomer, with a rope or canvas wound in a spiral shape as the core. Are laminated in two or more layers.

[0004]

The flat belt used for conveying paper sheets is very thin unlike a V-belt or a thick flat belt, and even if the material constituting the belt is slightly deformed, the entire belt is greatly affected. And led to belt warpage.

There is no problem if a single type of elastomer is a single-layered belt, but the belt is usually formed by laminating two or more layers of members as described above, and these members are made of different materials. Most are laminated.

[0006] The material of the member constituting the belt has different linear expansion coefficients depending on the type, the ratio of the material by the temperature change of heating and cooling to contract or expand are different, for example, the body of elastomeric among the belt In a belt having a two-layer structure in which canvas is laminated on the upper surface, the linear expansion coefficient of the elastomer and the canvas are different due to a change in environmental temperature, and the belt is warped because the upper layer and the lower layer have different elongations.

Further, even if the belt has a three-layer structure and the same material elastomer is laminated on both the upper and lower sides of the core body, if the thickness of the elastomer laminated on the upper and lower layers is different, the degree of elongation of each is also changed. Warpage occurs. In the case of a belt obtained by molding and vulcanizing such an elastomer such as rubber or resin ,
Since there is always a heating and cooling process ,
Thus it is also possible to warp to the belt occurs.

If the belt on which warpage is generated is used as it is for the purpose of transporting paper sheets, the paper sheets cannot be pinched well, and the frictional force at the time of transport between the belt and the paper sheets becomes unstable, and the paper sheets become unstable. This has prevented reliable and accurate transport of such items. The present invention provides a thin flat belt that prevents warpage caused by a temperature change due to such a difference in linear expansion coefficient between each material, stabilizes the frictional force between the paper sheet and the belt, and realizes reliable and accurate conveyance. With the goal.

[0009]

According to the present invention, in order to achieve such an object , a core body is embedded in an elastomer.
In the thin flat belt for conveying paper sheets, a stretch layer consisting of an extension rubber and an upper cloth, an adhesive layer consisting of an upper adhesive rubber, a core body, and a lower adhesive rubber, and a compression layer consisting of a lower cloth and a compressed rubber are provided on the belt. A belt comprising: a combination of stretch rubber and compression rubber; an upper cloth and a lower cloth; and an upper adhesive rubber and a lower adhesive rubber. And

[0010]

According to the present invention, the constituent materials of the upper layer and the lower layer of the belt are arranged at the center of the belt in the thickness direction, and each material expands and contracts due to a temperature change. However, since almost the same change occurs up and down from the center in the thickness direction of the belt, both changes are canceled out, and as a result, no warping occurs on the entire belt.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a perspective view of a thin flat belt for transporting paper sheets of the present invention, and FIG. 2 is a sectional view taken along line AA in FIG.

The thin flat belt 1 for conveying paper sheets of the present invention has an adhesive layer A having a core 2 embedded in upper and lower adhesive rubbers 3 and 4.
Is disposed at the center in the thickness direction of the belt 1, an extension layer B composed of an upper cloth 5 and an extension rubber 6 is present above the adhesive layer A, and a lower cloth 7 and a compression rubber 8 are laminated. And in this case belt 1
The center in the thickness direction of the core 2 is the core 2 in the adhesive layer A, which is laminated above and below, the upper adhesive rubber 3, the lower adhesive rubber 4, the upper cloth 5, the extension rubber 6, the lower cloth 7, The compression rubber 8 is disposed so as to be vertically symmetric about the core 2. The symmetry is such that the thickness as well as the material is symmetric.

The material constituting the core body 2 is a rope, woven fabric or knit made of organic fibers such as polyester fiber, polyamide fiber, aramid fiber, rayon fiber or inorganic fiber such as glass fiber or steel wire. Is mentioned.

The upper and lower adhesive rubbers 3 and 4 and the extension rubber 6 and the compression rubber 8 for embedding such a core body are
It is made of a single material such as NR (natural rubber), SBR (styrene / butadiene rubber), CR (chloroprene rubber), HNBR (hydrogenated nitrile rubber), or a rubber or polyurethane appropriately blended with them.

Further, the extension rubber 6 and the compression rubber 8 are made of the above-described rubber as a basic material. However, in addition to the rubber, if necessary, short fibers may be mixed for improving abrasion resistance. Good. In this case, the short fibers to be mixed include cotton, polyamide, polyester, rayon,
Typical examples include glass fibers, carbon fibers, and aramid fibers, but are not limited to these short fibers, and other fibers may be used.

The length of these short fibers is 0.5 to
If it is within the range of 10 mm, and if it is less than 0.5, the amount of short fibers exposed to the belt surface will be insufficient and the effect of abrasion resistance will be poor. This is undesirable because the effect of wear is reduced.

On the other hand, the mixing amount of the short fibers is preferably 5 to 40% by weight based on 100 parts by weight of the elastomer. If the amount is less than 5% by weight, the effect of abrasion resistance is reduced. If the amount is more than 40% by weight, the degree of deteriorating other physical properties of the elastomer as foreign matter in the elastomer becomes too large. These short fibers are mixed into the elastomer with an orientation in the width direction of the belt.

The upper cloth 5 disposed above the extension rubber 6 and the lower cloth 7 disposed below the compression rubber 8 are bias canvas in which both weft yarns are made of cotton yarn, and a wide bias angle of 90 to 120 °. An angled canvas, a stretched canvas woven with a crimped nylon warp subjected to woolly processing and a normal nylon weft, or the like coated with or impregnated with the rubber material is used.

The upper cloth 5 and the lower cloth 7 are usually attached to the upper and lower surfaces of the adhesive layer A with an adhesive. It is not inconvenient to use any of the above-described materials for the extension rubber 6, the compression rubber 8, the upper cloth 5, and the lower cloth 7, but to make the upper and lower parts symmetrical, the extension rubber 6 and the compression rubber 8 are made of the same material and have the same thickness. Therefore, the upper cloth 5 and the lower cloth 7 must be made of the same material and have the same thickness.

Thus, the extension layer B as described above is replaced with the adhesive layer A.
In the present invention, the extension layer B and the compression layer C are arranged symmetrically with respect to the adhesive layer A as described above. A itself is also symmetrical with respect to the center in the thickness direction, so that the belt as a whole is a vertically symmetrical belt with the center of the center in the thickness direction as the center of symmetry.

[0021]

Next, an experimental example for confirming the effect of the present invention will be described. As Example 1, a 0.1 mm thick stretch layer made of a 0.2 mm thick upper cloth woven from 0.1 mm thick chloroprene rubber stretch rubber and polyamide fiber from the top of the belt.
m-thick chloroprene rubber adhesive rubber and 150 denier core made of polyester, 0.1 mm-thick chloroprene rubber adhesive rubber adhesive layer, 0.2-mm-thick lower cloth woven from polyamide fiber and 0.1 mm-thick A belt having a width of 20 mm and a thickness of 0.9 mm was constituted by a compression layer made of compressed rubber made of chloroprene rubber.

Then, as Comparative Example 1, the belt was placed at 0.
A 1 mm thick chloroprene rubber stretch rubber and a 0.2 mm thick upper cloth woven from polyamide fibers,
It is composed of a 0.1 mm thick chloroprene rubber adhesive rubber, a 150 denier core body made of polyester, a 0.1 mm thick chloroprene rubber adhesive rubber, and a 0.3 mm thick chloroprene rubber stretched rubber compression layer. The belt had a thickness of 20 mm and a thickness of 0.9 mm.

As Comparative Example 2, 0.3 mm from the top of the belt
A stretch layer made of stretch rubber made of thick chloroprene rubber,
0.1 mm thick chloroprene rubber adhesive rubber, 150 denier core made of polyester, 0.1 mm thick chloroprene rubber adhesive rubber, 0.2 mm thick lower cloth woven with polyamide fiber and 0.1 mm thick chloroprene It is composed of a compression layer made of rubber compression rubber and has a width of 20
mm and a belt having a thickness of 0.9 mm.

Table 1 summarizes these constituent materials. A thin flat belt for conveying paper sheets as shown in FIG. 2 was manufactured from the three types of constituent materials of Example 1 and Comparative Examples 1 and 2 through known molding and vulcanization processes. Then, the amount of warpage in the width direction of the obtained belt was measured. Table 2 shows the results.

[0026]

[Table 1]

[0027]

[Table 2]

According to the results shown in Table 2, the thin flat belt for transporting paper sheets of the present invention had almost no apparent warp on the belt, and the measured value was 0 mm.

[0029]

As described above, the thin flat belt for transporting paper sheets of the present invention has a symmetrical configuration of the upper layer and the lower layer of the belt with respect to the center in the thickness direction of the belt. Even if the material constituting the belt expands and contracts due to a change in temperature, the upper and lower sides of the belt are balanced, and warpage of the belt can be prevented. Since a belt without sled is obtained, it can be surely performed even in the conveyance of paper sheets.

[Brief description of the drawings]

FIG. 1 is a perspective view of a thin flat belt for conveying paper sheets of the present invention.

FIG. 2 is a sectional view taken along line AA in FIG.

FIG. 3 is a sectional view corresponding to FIG. 2 according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Thin flat belt for conveying paper sheets 2 Core 3 Upper adhesive rubber 4 Lower adhesive rubber 5 Upper cloth 6 Extension rubber 7 Lower cloth 8 Compression rubber layer A Adhesion layer B Extension layer C Compression layer

Claims (1)

(57) [Claims] 1. A paper comprising a core embedded in an elastomer.
For thin flat belts for transporting leaves, extending from above the belt
Stretch layer consisting of rubber and upper cloth, upper adhesive rubber and core and lower adhesive
Adhesive layer made of rubber, compressed layer made of lower cloth and compressed rubber
A belt composed of stretch rubber and compressed rubber, upper cloth
And lower cloth, upper adhesive rubber and lower adhesive rubber
Each combination is made of the same material and the same thickness
A thin flat belt for transporting paper sheets.