JP2003192169A - Flat belt for carrying paper sheets - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flat belt for carrying paper sheets in which the modulus of elasticity in the longitudinal direction of the belt when the service temperature of the belt is low, is not largely different from that at normal service temperature. <P>SOLUTION: A belt body 2 of the belt 1 for carrying paper sheets is formed of millable urethane polymer. In the millable urethane polymer, ≥50 mass% to ≤100 mass% of the soft segment polyol is polycaprolacton ester. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper sheet conveying flat belt for conveying paper sheets such as banknotes and tickets.

[0002]

2. Description of the Related Art Generally, ATM (automated teller mac)
cash deposit machines such as hine) and CD (cash dispenser),
In automatic ticket gates and the like, paper sheets such as banknotes and tickets are carried in multiple directions by sandwiching the top and bottom with a pair of flat belts for carrying paper sheets.

Japanese Patent Laid-Open No. 7-125866 discloses a flat belt for conveying paper sheets, in which the belt body is made of a millable urethane polymer, and a knitted or woven fabric is embedded in the belt body. Has been done.

Since such a flat belt for conveying paper sheets conveys the paper sheets on the surface of the belt, it is necessary to apply tension in the longitudinal direction of the belt in order to obtain a conveying force. Usually, in order to give such tension. It is used in a state where it is stretched in the longitudinal direction of the belt in advance.

[0005]

By the way, as described above, when the belt is stretched in the longitudinal direction in advance to a certain extent and the temperature at which the belt is used is changed, the physical properties of the millable urethane polymer forming the belt main body are also changed. When the elastic modulus in the longitudinal direction of the belt changes, the tension applied to the belt also changes accordingly. To drive the belt,
Generally, a motor is used. Therefore, it is necessary to select, as the motor, a motor having a driving force adapted to the maximum value of the belt tension when the belt use temperature is low. On the other hand, a belt driving motor is required to be compact, that is, to have a driving force as small as possible.

The present invention has been made in view of the above points, and an object of the present invention is to convey paper sheets in which the elastic modulus in the longitudinal direction of the belt when the temperature of use of the belt is low is not significantly different from that at room temperature. To provide a flat belt.

[0007]

According to the present invention, polycaprolactone ester accounts for 50% by mass or more and 100% by mass or less of the soft segment polyol of the millable urethane polymer forming the belt body.

[0008] Specifically, the present invention is premised on a flat belt for conveying paper sheets, the belt main body of which is made of a millable urethane polymer. The millable urethane polymer is characterized in that 50% by mass or more and 100% by mass or less of the soft segment polyol is a polycaprolactone ester.

According to the above construction, since the millable urethane polymer forming the belt main body is made of polycaprolactone ester, the change in the elastic modulus of the belt due to the change in the temperature at which the belt is used is small. The elastic modulus in the longitudinal direction of the belt when the temperature is low is not much different from that at room temperature.

Here, when the polycaprolactone ester of the soft segment polyol of the millable urethane polymer is less than 50% by mass, the elastic modulus of the belt and the motor starting torque, and the ratio of the low temperature value to the normal temperature value of each. Becomes a big thing.

With the above configuration, 24
It is also possible to set the ratio of the elastic modulus in the belt longitudinal direction at −5 ° C. to the elastic modulus in the belt longitudinal direction at − ° C. within a range of 100% or more and 130% or less in percentage.

Here, the "elastic modulus" means the initial inclination of the stress-strain curve in the longitudinal direction of the belt.

[0013]

As described above, according to the present invention,
The elastic modulus in the longitudinal direction of the belt when the temperature at which the belt is used is low may not be significantly different from that at room temperature.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows a flat belt 1 for conveying paper sheets according to an embodiment of the present invention.

The paper sheet conveying flat belt 1 is composed of a belt-shaped endless belt body 2 and a canvas 3 embedded in the surface layer of the belt body 2.

The belt body 2 is made of a polycaprolactone ester-based millable urethane polymer, that is, 50% by mass or more and 100% or more of the soft segment polyol.
A millable urethane composition in which carbon black, a cross-linking agent and other compounding agents are mixed and cross-linked to a millable urethane polymer whose mass% is polycaprolactone ester is formed.

The canvas 3 is, for example, 7.78 × 10 ⁻³ g /
A knitted fabric or woven fabric formed by a covering yarn in which a polyurethane yarn of m is covered with a 2.22 × 10 ⁻³ g / m polyester yarn is immersed in a resorcinol-formalin-latex (RFL) solution before belt molding. It is formed of a material that has been subjected to an adhesion treatment of drying.

The canvas 3 is embedded in the surface layer of the belt main body 2, but the yarns forming the canvas 3 are partially exposed on the belt surface, and the yarns 3a, 3a, ... Are oriented in the belt longitudinal direction. As a result, the coefficient of friction between the paper sheet and the belt surface can be ensured to the extent that it does not hinder the conveyance, and the friction coefficient between the opposing belts is reduced to suppress the inconvenience such as heat generation. be able to.

In the flat belt 1 for conveying paper sheets, the ratio of the elastic modulus in the belt longitudinal direction at -5 ° C to the elastic modulus in the belt longitudinal direction at 24 ° C is 100% or more in percentage.
Within the range of 30% or less.

Next, a method of manufacturing the flat belt 1 for conveying paper sheets will be described.

First, the surface of a cylindrical metal mold is covered with a canvas processed into a tubular shape, and an uncrosslinked millable urethane composition sheeted to a predetermined thickness (for example, about 0.6 mm) is covered thereover twice.

Then, a cylindrical mold set with canvas and uncrosslinked millable urethane is placed in a heating and pressurizing device, and the millable urethane is crosslinked by heating and pressurizing.

Then, the cylindrical mold is taken out from the heating and pressurizing device, and after cooling, the cylindrical belt precursor is removed from the cylindrical mold.

Then, the millable urethane side of the belt precursor is polished to make the thickness uniform and a predetermined width is cut out, and the canvas side is turned upside down.

Since the flat belt 1 for conveying paper sheets having the above-mentioned structure uses a polycaprolactone ester-based millable urethane polymer for forming the belt main body 2, the flat belt 1 can be The change in elastic modulus is small, so that the elastic modulus in the longitudinal direction of the belt when the temperature at which the belt is used is low can be made substantially the same as that at room temperature. Therefore, as the motor for driving the belt, it suffices to select a motor that can drive at room temperature.

[0027]

[Examples] A flat belt for transporting paper sheets was tested and evaluated.

<Test Evaluation Belt> The following flat belts for conveying paper sheets of Examples 1 to 6 were produced. Table 1 shows the respective configurations.

-Example 1- 1 part by weight of a processing aid, 1 part by weight of zinc stearate, 2 parts by weight of a hydrolysis stabilizer, 20 parts by weight of carbon black, based on 100 parts by weight of a polycaprolactone ester-based millable urethane polymer. 6 parts by mass of conductive carbon black, 10 parts by mass of anti-aging agent DBP, TAIC3 crosslinking agent
Example 1 was a flat belt for conveying paper sheets formed by using an uncrosslinked millable urethane composition in which 6 parts by weight of dicumyl peroxide and 6 parts by weight of dicumyl peroxide were mixed.

Example 2-A flat belt for conveying paper sheets having the same structure as in Example 1 except that the mixing amount of carbon black was 40 parts by mass.
And

Example 3-A flat belt for conveying paper sheets having the same structure as in Example 1 except that an ethylene adipate-based millable urethane polymer was used was used as Example 3.

Example 4-A flat belt for conveying paper sheets having the same structure as in Example 3 except that the mixing amount of carbon black was 40 parts by mass.
And

Example 5-1 part by weight of processing aid, 1 part by weight of zinc stearate, 2 parts by weight of hydrolysis stabilizer, and 20 parts by weight of carbon black based on 100 parts by weight of polyether-based millable urethane polymer.
Parts by mass, conductive carbon black 6 parts by mass, antioxidant DBP 10 parts by mass, accelerator MBTS 4 parts by mass, accelerator M
Example 5 was a flat belt for conveying paper sheets formed by using an uncrosslinked millable urethane composition in which 2 parts by mass of BT, 1 part by mass of curacene and 1.5 parts by mass of sulfur were mixed.

-Example 6- 1 part by weight of a processing aid, 1 part by weight of zinc stearate, and hydrolysis-stabilized with respect to 100 parts by weight of a millable urethane polymer consisting of 40 parts by weight of a polycaprolactone ester type and 60 parts by weight of an ethylene adipate type. Agent 2 parts by mass, carbon black 20 parts by mass, conductive carbon black 6 parts by mass, antiaging agent DBP 10 parts by mass, crosslinking aid TAIC3
Example 6 was a flat belt for conveying paper sheets formed by using an uncrosslinked millable urethane composition in which 6 parts by weight of dicumyl peroxide and 6 parts by weight of dicumyl peroxide were mixed.

[0035]

[Table 1]

<Test Evaluation Method> For the flat belts for conveying paper sheets of Examples 1 to 6, the elastic modulus in the longitudinal direction of the belt at a belt use temperature of -5 ° C. (at low temperature) and the belt use temperature of 24 ° C. ), The elastic modulus in the longitudinal direction of the belt was measured, and
The elastic modulus ratio at 5 ° C. was calculated as a percentage.

For the flat belts for conveying paper sheets of Examples 1 to 6, the motor starting torque at a belt operating temperature of -5 ° C (low temperature) and the motor starting torque at a belt operating temperature of 24 ° C (normal temperature) are shown. With measurement, 24
The ratio of the starting torque at -5 ° C to the starting torque at 0 ° C was calculated as a percentage. As shown in FIG. 2, the belt 1 is wound around the crown pulley having a diameter of 30 mm as the drive pulley 13 and the driven pulley 14 in a state of being stretched by 5%, and the motor 15 is started to measure the torque at that time. It was measured at. Then, the starting torque T was obtained as a difference T = T1-T2 between the maximum torque T1 at the time of starting with the belt attached and the maximum torque T2 at the time of starting without the belt.

<Test Evaluation Results> Table 1 shows the test evaluation results.

According to the table, in Examples 1 and 2 in which the polycaprolactone ester type was used as the millable urethane polymer forming the belt body, the difference between the elastic modulus at −5 ° C. and the elastic modulus at 24 ° C. Is relatively small, and the ratio of the former to the latter is in the range of 100% to 130% in percentage. On the other hand, in Examples 3 and 4 using the ethylene adipate type as the millable urethane polymer forming the belt body and Example 5 using the polyether type, the elastic modulus at −5 ° C. and 24 ° C. The difference from the elastic modulus at the time is relatively large, and the ratio of the former to the latter is 1 in percentage.
It is 50% or more. These tendencies are also observed in the motor starting torque.

From the above, by using a polycaprolactone ester type as the millable urethane polymer forming the belt body, the elastic modulus in the longitudinal direction of the belt at room temperature (24 ° C.) at a low temperature such as −5 ° C. is used. It has been confirmed that it can be made not so different from.

In Example 6, the millable urethane polymer forming the belt main body was made of polycaprolactone ester, but the elastic modulus at −5 ° C. and 24
The difference from the elastic modulus at ° C is relatively large, and the ratio of the former to the latter is 150% in percentage. The motor starting torque has the same tendency. Example 1 and Example 6 have the same composition except the composition of the millable urethane polymer, but the former is 100% by mass.
While it is of the polycaprolactone ester type,
The latter is 40% by mass of polycaprolactone ester and is 60
% Ethylene adipate system. This means that it is necessary that the millable urethane polymer contains at least 40 mass% of polycaprolactone ester type. In order to obtain the effect of the polycaprolactone ester-based millable urethane polymer, it is necessary that the main component is a polycaprolactone ester-based one, that is, the content of the polycaprolactone ester-based one is 50% by mass or more. Presumed necessary.

[Brief description of drawings]

FIG. 1 is a perspective view of a flat belt for conveying paper sheets according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a motor starting torque measuring device.

[Explanation of symbols]

1 Flat belt for conveying paper sheets 2 Belt body 3 canvas 3a Thread 13 Drive pulley 14 Driven pulley 15 motor 16 Torque meter

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yoko Asami             3-2-15 Meiwa Dori, Hyogo-ku, Kobe City, Hyogo Prefecture               Bando Chemical Co., Ltd. F term (reference) 3F049 BA11 LA08 LB04

Claims (2)

[Claims] 1. A flat belt for conveying paper sheets, the belt body of which is made of a millable urethane polymer, wherein the millable urethane polymer comprises polycaprolactone ester in an amount of 50% by mass or more and 100% by mass or less of the soft segment polyol. A flat belt for conveying paper sheets, which is characterized by: 2. The flat belt for transporting paper sheets according to claim 1, wherein the elastic modulus in the belt longitudinal direction at 24 ° C. is −5 ° C.
The elastic modulus ratio in the longitudinal direction of the belt is 100 in percentage.
% To 130% or less, a flat belt for transporting paper sheets.