JPH05221547A - Endless belt for conveying paper sheet - Google Patents

Abstract

PURPOSE:To improve running stability and perform stable conveyance of paper sheets by reducing any influence of sheet powder by preventing the occurrence of slacking and snaking during running. CONSTITUTION:In an endless belt 1 for conveying paper sheets in many directions in its state to nip paper sheets, a plurality of recessed grooves 3 are formed on a belt conveyance surface 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in an endless belt for conveying paper sheets, and more particularly to measures for reducing the friction coefficient.

[0002]

2. Description of the Related Art Generally, ATM (automated teller mac)
cash deposit payment machines such as hine) and CD (cash dispenser),
In an automatic ticket gate or the like, as shown in FIG. 9, a paper sheet a such as a bill or a ticket is often sandwiched between endless belts c and d wound around a plurality of pulleys b, b, .... It is carried in the direction. In this way, when the paper sheet a is conveyed in multiple directions by the endless belts c and d, at the conversion point e where the conveyance direction changes, the winding length around the pulley b comes into contact with the endless belt c that is in contact with the pulley b. It differs from the endless belt d which is not used. That is, if the belt thickness is 2t, the pulley radius is R, and the belt winding angle is θ, the pulley b
The winding length of the endless belt c in contact with is (R + t)
θ, and the winding length of the endless belt d that is not in contact with the pulley b is (R + 3t) θ, and is 2tθ between the two.
Difference occurs. In this case, if slippage is not given between the belt conveying surfaces of the endless belts c and d, and if they pass through the pulley b in a state where they are in complete contact, they contact the pulley b due to the difference in the winding length. A slack portion f of 2tθ is generated in the endless belt d, which is not supported, which causes problems such as unstable belt running.

Even if slippage occurs between the belt conveying surfaces, since the friction coefficient between the endless belts c and d is high, heat is generated and the endless belts c and d are prematurely worn or abnormal noise is generated. This will hinder the transportation of the leaf a.

Further, paper dust is generated as the paper sheet a is conveyed. When this paper dust adheres to the belt conveyance surface, the friction coefficient between the endless belts c and d decreases more than necessary, and the paper sheet a cannot be stably conveyed.

Therefore, as disclosed in, for example, Japanese Patent Publication No. 59-24684, a belt-conveying surface of a belt main body is formed so that an uneven shape formed by a weft and a warp of a seamless woven cloth appears on the belt-conveying surface. A sheet of paper that is embedded in the side to reduce the friction coefficient of the belt conveying surface and give a slip between the belt conveying surfaces to eliminate the slack of the endless belt due to the winding length and to smoothly convey the sheet. Endless belts for conveying types have been proposed.

[0006]

However, since this kind of endless belt is generally used in a state of constant elongation (for example, 5% elongation), it has elasticity as a woven cloth embedded in the belt body. Has been adopted and therefore
There is a problem that the straightness of the woven fabric is disturbed during rubber vulcanization, etc., and the runability becomes unstable due to this disorder, and the running locus is likely to meander.

Further, although the endless belt of the above-mentioned proposed example has an uneven shape formed on the belt conveying surface, this uneven shape is pressed by the endless belt on the other side at the time of conveyance and is brought into contact with the entire surface. Therefore, the paper particles are likely to be affected by the paper dust generated when the paper sheets are conveyed, and the paper sheets cannot be stably conveyed due to the unnecessary reduction of the friction coefficient between the endless belts as in the conventional case.

The present invention has been made in view of the above points, and an object of the present invention is to improve the structure on the side of the belt conveying surface to eliminate slack and meandering during running and to further improve running stability. In addition to increasing it, the effect of paper dust should be reduced to ensure stable transportation of paper sheets.

[0009]

In order to achieve the above object, the solution means of the present invention according to claim 1 is an endless belt for conveying paper sheets which conveys paper sheets in multiple directions while sandwiching them. That is, a plurality of concave grooves are formed on the belt conveyance surface.

According to a second aspect of the present invention, in the above case, the concave grooves are arranged in a row in the belt width direction so as to extend in the belt circumferential direction.

[0011]

With the above construction, in the present invention according to claim 1, the number of contact portions between the endless belts is reduced by the plurality of concave grooves formed on the belt conveying surface during conveyance, and the friction coefficient of the belt conveying surface is entirely reduced. Compared with the case where they are in contact with each other, slippage is given between the belt conveying surfaces, so that the slack of the endless belt due to the winding length is eliminated and the conveying is smoothly performed. Further, the straightness disorder such as the seamless woven fabric due to the stretchability is eliminated, and the traveling locus is stabilized without meandering. In addition, since the paper dust generated as the paper is conveyed enters each concave groove, the amount of paper adhered to the belt conveyance surface (the convex portion that comes into contact with the paper) is reduced accordingly, and the space between the endless belts is reduced. The coefficient of friction of does not decrease more than necessary, and the paper sheets are stably conveyed.

According to the second aspect of the present invention, when the endless belt is attached to the crown pulley, the concave grooves formed in a row in the belt width direction so as to extend in the belt circumferential direction serve as starting points to form the belt conveying surface. Since it has a convex curved surface that curves in the belt width direction, it fits easily on the crown pulley, further improves running stability, and the belt clamping force can be increased to shift the paper sheet conveyance posture. Instead, it is kept in a normal state.

[0013]

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

FIG. 1 shows an endless belt 1 for conveying paper sheets according to an embodiment of the present invention. The endless belt 1 is a synthetic rubber such as thermosetting polyurethane rubber, acrylonitrile rubber, polybutadiene rubber and hypalon rubber. Is molded using a material in which various compounding agents such as carbon black and a plasticizer are dispersed.

Further, as a feature of the present invention, the endless belt 1
2, a plurality of concave grooves 3, 3, ... Having a U-shaped cross section are formed on the belt conveying surface 2 of FIG.
Moreover, the concave grooves 3 are arranged in a row in the belt width direction so as to extend in the belt circumferential direction. The depth of each concave groove 3 is, for example, within a range of 5 to 30% with respect to the thickness of the endless belt 1,
It may be selected from the belt width, thickness, elastic modulus, curvature of the crown pulley, etc. in consideration of the belt tension, the fitting property to the pulley, and the like.

The endless belt 1 constructed as described above has three pulleys 4, 4 and 4 and four pulleys 5 and 5 of the conveying device laid out as shown in FIG. 8, for example.
Each of the belts is wound around the belt with the belt conveying surface 2 facing outward, and is conveyed in multiple directions with the paper sheet P being sandwiched in the V-shaped portion where the endless belts 1 and 1 contact each other.

At this time, since the area of the belt contact portion which is the V-shaped portion is halved by each concave groove 3, the friction coefficient of the belt conveying surface 2 is significantly larger than that in the case where the belt conveying surface 2 is in full contact. It is possible to reduce slippage between the belt conveying surfaces 2 and 2 and thereby to eliminate the slack caused by the winding length of the lower endless belt 1 which is not in contact with the pulley 4 to smoothly convey the belt. Can be done.

Further, in the endless belt of the above-mentioned proposed example, the straightness is disturbed due to the stretchability of the seamless woven cloth, but in the present embodiment, such a situation does not occur and the running locus is not meandered. Can be stabilized.

Further, the paper dust generated by the conveyance of the paper sheet P can be put into each concave groove 3, and the paper sheet P with respect to the belt conveying surface 2 (the convex portion which comes into contact with the paper sheet) can be correspondingly filled. Can be reduced and the friction coefficient between the endless belts 1 and 1 need not be lowered more than necessary, and the paper sheet P can be stably conveyed.

Furthermore, as shown in FIG. 3, when the endless belt 1 is attached to the crown pulley 6, each of the concave grooves 3 serves as a starting point and the belt conveying surface 2 becomes a convex curved surface curved in the belt width direction. As a result, the fitability with respect to the crown pulley 6 can be improved to further improve the running stability, and the gripping force of the endless belt 1 can be increased to shift the conveyance posture of the paper sheet P. Instead, it can be kept in a normal state.

In the above embodiment, the case where the concave groove 3 formed on the belt conveying surface 2 has a U-shaped cross section is shown. However, the present invention is not limited to this and, for example, as shown in FIG. It may be a "V" shape or a "U" shape as shown in FIG.

Further, in the above embodiment, the concave grooves 3 are arranged in a row in the belt width direction so as to extend in the belt circumferential direction, but the direction is changed by 90 ° from that of the embodiment, that is, it extends in the belt width direction. The belts may be arranged in the circumferential direction of the belt as described above, or may be formed so as to be orthogonal to each other in a lattice shape, but it is preferable to form them as in the embodiment in consideration of fitability to the crown pulley and the like.

Although the core body is not provided in the above embodiment, a woven fabric or the like may be embedded as a core body to reinforce the core body. Further, as shown in FIG. Alternatively, the frictional force may be reduced by arranging the belt-conveying surface 2 side along each concave groove 3 thereof. Further, as shown in FIG. 7, a short fiber mixed rubber layer 9 in which short belts 8, 8, ... Made of, for example, polyester short fibers, nylon short fibers and aramid short fibers are mixed on the belt conveying surface 2 side.
Alternatively, it may be laminated on the lower rubber layer 10. Further, as the rubber constituting the endless belt 1, other thermoplastic elastomer may be used in addition to synthetic rubber.

Next, a specific example of the endless belt 1 will be shown.

(Specific Example) Using thermosetting polyurethane rubber, an endless belt 1 having a polyester woven cloth interposed in the middle of the belt thickness direction was formed. The belt thickness of the endless belt 1 is 0.7 mm, the belt width is 15 mm, and the depth on one side (belt conveying surface 2) extending in the belt circumferential direction; 0.5 mm.
The plurality of concave grooves 3 are provided at a pitch of 2 mm in the belt width direction. Then, the belt conveying surface 2 of the endless belt 2,
The friction coefficient between the two was 0.9.

When this endless belt 1 was wound around a conveying device shown in FIG. 8 using a crown pulley having outer diameters of 25.5 mm and a crown radius of 60 mm as the pulleys 4 and 5, the sheets were run. The pulley 4 at the V-shaped portion for changing the P conveying direction smoothly rotated, and there was no problem in conveying the paper P.

Further, when the holding force when the banknote was pulled out while being sandwiched between the endless belts 1 and 1, the holding force was 1.2 times that of the endless belt in which the concave groove 3 was not formed. ..

[0028]

As described above, according to the first aspect of the present invention, since the plurality of concave grooves are formed on the belt conveying surface, the friction coefficient of the belt conveying surface due to the reduction of the contact portion between the endless belts. The transport can be performed smoothly by significantly reducing Further, it is possible to eliminate the disturbance of straightness due to stretchability such as seamless woven fabric, and to stabilize the traveling locus. Also, the paper dust generated by the conveyance of the paper sheets can be put into each concave groove to reduce the adhesion of the paper sheets to the belt conveying surface by that amount, and prevent the friction coefficient between the endless belts from being lowered more than necessary. The paper sheets can be stably transported.

According to the second aspect of the present invention, since the concave grooves are arranged in a row in the belt width direction so as to extend in the belt circumferential direction, it is possible to easily fit the endless belt to the crown pulley and to improve running stability. In addition to being able to further improve, the paper sheets can be strongly held and can be held in a normal state.

[Brief description of drawings]

FIG. 1 is a perspective view showing a part of an endless belt according to an embodiment.

FIG. 2 is a vertical cross-sectional view showing a shape of a concave groove of an endless belt according to an embodiment.

FIG. 3 is a vertical cross-sectional view showing a state in which an endless belt according to an embodiment is wound around a crown pulley.

FIG. 4 is a vertical cross-sectional view showing a modified example of the concave groove of the endless belt.

FIG. 5 is a vertical cross-sectional view showing a further modified example of the concave groove of the endless belt.

FIG. 6 is a vertical sectional view showing another embodiment of the endless belt.

FIG. 7 is a vertical sectional view showing still another embodiment of the endless belt.

FIG. 8 is a schematic configuration diagram of a conveyance device to which the endless belt of the present invention is applied.

FIG. 9 is a schematic configuration diagram of a conveyance device to which a conventional endless belt is applied.

[Explanation of symbols]

 1 Endless belt 2 Belt transport surface 3 Concave groove P Paper sheet

Claims (2)

[Claims] 1. An endless belt for conveying paper sheets, which conveys paper sheets in multiple directions while sandwiching them, the belt conveying surface comprising:
An endless belt for transporting paper sheets, wherein a plurality of concave grooves are formed. 2. The endless belt for conveying paper sheets according to claim 1, wherein the concave grooves are arranged in a row in the belt width direction so as to extend in the belt circumferential direction.