JP3110126B2 - Endless 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 an improvement of an endless belt for conveying paper sheets, and more particularly to a measure for reducing a coefficient of friction.

[0002]

2. Description of the Related Art Generally, an ATM (automated teller mac) is used.
hine) and cash dispensers such as CD (cash dispenser),
In an automatic ticket gate and the like, as shown in FIG. 6, paper sheets a such as bills and tickets are often sandwiched between endless belts c and d wound around a plurality of pulleys b, b,. Transport in the direction has been performed. When the sheet a is conveyed in multiple directions by the endless belts c and d in this manner, at the conversion point e where the conveyance direction changes, the winding length around the pulley b contacts the endless belt c contacting the pulley b. It differs with the endless belt d that has not been used. That is, if the belt thickness is 2t, the pulley radius is R, the belt winding angle is θ, the pulley b
The winding length of the endless belt c in contact with is (R + t)
and the winding length of the endless belt d not in contact with the pulley b is (R + 3t) θ, and 2tθ
Is produced. In this case, no slippage is given between the belt conveying surfaces of the endless belts c and d, and when they pass through the pulley b in a state where they are completely in contact with each other, they come into contact with the pulley b due to the difference in the winding length. The unfinished endless belt d has a slack portion f of 2tθ, which causes problems such as unstable belt running.

[0003] Even if slippage occurs between the belt conveyance surfaces, the endless belts c and d are heated due to a high coefficient of friction between the endless belts c and d, and the endless belts c and d are worn out at an early stage or generate abnormal noise. This will hinder the transport of the leaves a.

Therefore, as disclosed in, for example, Japanese Patent Publication No. 59-24684, a seamless woven fabric is formed on a belt conveying surface of a belt main body such that an uneven shape formed by its weft and warp appears on the belt conveying surface. The paper leaf is embedded on the side, thereby reducing the coefficient of friction of the belt transport surface, giving a slip between the belt transport surfaces, and eliminating slack of the endless belt due to the wrapping length so that transport can be performed smoothly. Endless belts for class transport have been proposed.

[0005]

However, since this kind of endless belt is generally used in a constant elongation (for example, 5% elongation), it is stretchable as a woven fabric embedded in the belt body. Has been adopted,
The straightness of the woven fabric is disturbed at the time of rubber vulcanization or the like, which causes a problem that the running property becomes unstable and the running locus tends to meander.

SUMMARY OF THE INVENTION The present invention has been made in view of the foregoing, and an object of the present invention is to properly embed another material in place of a woven fabric on the belt conveying surface side so that slack or meandering during traveling can be achieved. To further enhance running stability.

[0007]

Means for Solving the Problems In order to achieve the above object, a solution of the present invention according to claim 1 is to provide an endless belt for transporting paper sheets in a multi-direction while sandwiching the paper sheets. And the short fibers are embedded so as to be exposed on the belt conveying surface.

According to a second aspect of the present invention, in the above case, the belt conveying surface is formed as a convex curved surface curved in the belt width direction.

[0009]

With the above arrangement, in the present invention according to the first aspect, the exposed portions of the buried short fibers come into contact with each other during running of the belt, so that the friction coefficient of the belt conveying surface is close to that in the case where the belt is in close contact. As a result, slippage is given between the belt conveying surfaces, so that the endless belt is not loosened due to the winding length, and the conveyance is smoothly performed. Further, the straightness of the straightness due to the elasticity as in the seamless woven fabric is not disturbed, and the running trajectory is stabilized without meandering.

According to the second aspect of the present invention, since the belt conveying surface has a convex curved surface curved in the belt width direction, the belt can be easily fitted to the crown pulley, and the running stability can be further improved. In addition, the gripping force of the endless belt is not increased, and the conveyance posture of the paper sheet does not deviate from the normal state.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

(First Embodiment) FIG. 1 shows a longitudinal sectional shape of an endless belt 1 for conveying paper sheets according to a first embodiment of the present invention.
In the figure, 2 is, for example, a thermosetting polyurethane rubber,
A belt body made of synthetic rubber such as acrylonitrile rubber, polybutadiene rubber, and Hypalon rubber,
The belt body 2 includes short fibers 3 made of, for example, polyester short fibers, nylon short fibers, and aramid short fibers.
3, ... are buried so as to be evenly distributed throughout,
A part of the short fibers 3, 3,... Is exposed on the belt conveying surface 4 by polishing the belt conveying surface (upper surface in FIG. 1).

As the short fibers 3, those having a diameter of 50 μm or less and a fiber length of about 0.5 to 3 mm are used. From the thickness and configuration of the endless belt 1, a suitable one may be selected within the above range. .

The short fibers 3 are preferably oriented in the thickness direction of the endless belt 1 from the viewpoint of reducing the friction coefficient and improving the wear resistance.
The endless belt 1 may be oriented with a slight inclination in the length or width direction of the belt depending on the elastic modulus in the length direction and width direction.

The rubber constituting the belt body 2 includes carbon black for reinforcing rubber, conductive carbon black for providing conductivity, plasticizer for providing cold resistance, etc. other than the short fibers 3. You may mix things.

The endless belt 1 configured as described above is composed of three pulleys 5, 5, 5 and four pulleys 6, 6, of a transport device laid out as shown in FIG.
Are conveyed in multiple directions with the paper sheet P interposed therebetween in the V-shaped portion where the endless belts 1 and 1 contact each other with the belt conveying surface 4 facing outward.

At this time, in the belt contact portion which is the V-shaped portion, the exposed portions of the short fibers 3, 3,. The friction coefficient of the conveying surface 4 can be greatly reduced as compared with the case where the belts are in close contact with each other, and a slip can be given between the belt conveying surfaces 4 and 4, whereby the lower endless belt 1 that is not in contact with the pulley 5. Can be prevented from being loosened due to the winding length, and the transfer can be performed smoothly. Furthermore, in the endless belt of the proposed example, the straightness was disturbed due to the elasticity of the seamless woven fabric, but in this embodiment, the running trajectory was stabilized without meandering. Can be.

When polishing the belt conveying surface 4,
It is economical to simultaneously expose the short fibers 3 and increase the thickness of the endless belt 1. Also, the surface of the belt body 2 that contacts the pulleys 5 and 6 may be polished to improve the surface accuracy. Further, the rubber constituting the belt body 2 is not limited to synthetic rubber, and other thermoplastic elastomers may be used.

(Second Embodiment) FIG. 2 shows a second embodiment.
In this embodiment, the belt body 2 of the endless belt 1 is composed of a first rubber layer 7 in which the short fibers 3 are embedded and a second rubber layer 8 in which the short fibers 3 are not embedded. The outer surface of the first rubber layer 7 is polished to expose the short fibers 3, 3,. In this case, the elastic modulus of the first rubber layer 7 and the elastic modulus of the second rubber layer 8 are set to be substantially the same so as to prevent disturbance of the pitch line of the endless belt 1 due to disturbance of the interface during molding. Is preferred. The thickness of the first rubber layer 7 is determined by the circumference of the endless belt 1,
The width, applied tension, and the like may be set so that the tensile force, the curvature when forming an arc, and the like are optimized.

Therefore, in this embodiment, the same operation and effect as those of the first embodiment can be obtained.

(Third Embodiment) FIG. 3 shows a third embodiment.
In this embodiment, a core body 9 such as a woven fabric is interposed between the belt main body 2 of the endless belt 1 of the second embodiment, that is, the first rubber layer 7 and the second rubber layer 8. Is similar to that of the second embodiment, and a detailed description thereof will be omitted.

Therefore, the present embodiment can also provide the same functions and effects as those of the first embodiment.

(Fourth Embodiment) FIG. 4 shows a fourth embodiment.
In the present embodiment, in the endless belt 1 of the second embodiment, the belt conveying surface 4 of the belt main body 2 is curved in the belt width direction to have a convex curved surface. That is, short fibers 3,3
Are embedded in the first rubber layer 7 and the second rubber layer 8 in which the short fibers 3 are not embedded, since the former has a smaller molding shrinkage than the latter, the first rubber has a smaller molding shrinkage. Layer 7
It positively utilizes the property of protruding to the side.

Therefore, in the present embodiment, the same operation and effect as in the first embodiment can be obtained. In addition, in the present embodiment, since the belt conveying surface 4 of the belt main body 2 has a convex curved surface curved in the belt width direction, it is easy to fit the crown pulley and the running stability is further improved. In addition, the holding force of the endless belt 1 can be increased, and the paper P can be held in a normal state without shifting the conveyance posture.

Next, a specific example of the endless belt 1 according to the third embodiment is shown together with a comparative example.

(Specific Example) A first rubber layer 7 in which polyester short fibers 3, 3,... Having a diameter of 10 μm and a fiber length of 0.5 mm are dispersed in a thermosetting polyurethane rubber, a polyester woven fabric core 9 and After laminating and vulcanizing a second rubber layer 8 of a thermosetting polyurethane rubber in order, the first rubber layer 7 is polished to a belt thickness where the short fibers 3 are exposed by about 0.05 mm; 0.7 mm Endless belt 1 was formed.

In the endless belt 1, the coefficient of friction between the belt conveying surfaces 4 and 4 was 0.7, and the coefficient of friction with paper was 0.4. When this endless belt 1 is used in the transport device shown in FIG. 5, the pulley 5 at the V-shaped portion for changing the transport direction of the paper P is smoothly rotated, and there is no problem in transport of the paper P. Was.

(Comparative Example) A polyester woven fabric core was interposed between a first rubber layer and a second rubber layer of a thermosetting polyurethane rubber in which short fibers were not dispersed, and then vulcanized, followed by polishing on both sides. To form an endless belt having a thickness of 0.7 mm.

In this endless belt, the coefficient of friction between the belt conveying surfaces is 2.6, and the coefficient of friction with paper is 1.7.
Met. When this endless belt was used in the conveyance device shown in FIG. 5, after passing through the pulley 5 at the V-shaped portion for changing the conveyance direction of the paper sheet P, the lower endless belt not in contact with the pulley 5 was 1 mm. Some degree of loosening occurs, and paper sheets P
Unevenness occurred in the transport of.

[0030]

As described above, according to the first aspect of the present invention, since the short fibers are embedded so as to be exposed on the belt conveying surface, the exposed portions of the short fibers come into contact with each other during conveyance. The friction coefficient of the belt conveying surface can be greatly reduced, and the endless belt can be prevented from slackening, so that the conveying can be performed smoothly. Further, it is possible to eliminate disturbance of straightness due to elasticity as in the case of a seamless woven fabric, and to stabilize a traveling locus.

According to the second aspect of the present invention, since the belt conveying surface is formed as a convex curved surface curved in the belt width direction, the belt can be easily fitted to the crown pulley to further improve running stability. As a result, the paper sheets can be strongly pinched, and can be held in a normal state without shifting the conveyance posture.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of an endless belt according to a first embodiment.

FIG. 2 is a longitudinal sectional view of an endless belt according to a second embodiment.

FIG. 3 is a longitudinal sectional view of an endless belt according to a third embodiment.

FIG. 4 is a longitudinal sectional view of an endless belt according to a fourth embodiment.

FIG. 5 is a schematic configuration diagram of a transport device to which the endless belt of the present invention is applied.

FIG. 6 is a schematic configuration diagram of a transport device to which a conventional endless belt is applied.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Endless belt 3 Short fiber 4 Belt conveyance surface P Paper

Claims (2)

(57) [Claims] An endless belt for transporting paper sheets in a multi-direction while sandwiching the paper sheets, wherein the short fibers are embedded so as to be exposed on a belt transportation surface. Endless belt for transporting leaves. 2. The endless belt for conveying paper sheets according to claim 1, wherein the belt conveying surface has a convex curved surface curved in a belt width direction.