JPH08169596A - Skew correction mechanism for paper sheets - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent skew of paper sheets caused by the fact that the pressing roller is not arranged above the sub roller. [Structure] A plurality of sub-rollers, which are located below the paper sheet conveyance path, have a high resistance portion on a part of the outer peripheral surface thereof, and are arranged in a direction orthogonal to the conveyance direction, and are located downstream of the sub-roller group. A plurality of friction rollers provided with a high resistance portion on a part of the outer peripheral surface and arranged in a direction orthogonal to the conveying direction, and a plurality of stop rollers that nipping the friction roller group and the conveying path in a vertical positional relationship. In the paper sheet transporting mechanism including, the high resistance portion of the outer peripheral surface of the sub roller located at the center is located on the front side in the rotation direction with respect to the high resistance portions of the other sub rollers, and both ends of the friction roller group. An auxiliary friction roller having no high resistance portion on the outer peripheral surface is disposed in the portion, and an auxiliary stop roller is disposed at a position facing the auxiliary friction roller. The conveying force at the nip with the up roller was reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper sheet skew correction mechanism capable of greatly reducing the occurrence rate of skew that tends to occur in a mechanism for conveying paper sheets such as banknotes and tickets.

[0002]

2. Description of the Related Art A bill handling device equipped with a mechanism for transporting bills, such as an automatic vending machine, a money changer, and a cash dispenser, a cash voucher,
In a paper sheet handling device such as a device having a mechanism for receiving and paying out various tickets, or a printing device having a mechanism for conveying originals and recording sheets, paper feeding and conveying Various mechanisms are equipped to prevent abnormal transportation such as skew, jam, and double feeding that are likely to occur, and to maintain a normal transportation state.

3 (a) and 3 (b) are a plan view and a front view showing a friction roller type separating mechanism which has been conventionally used for preventing double feeding of paper sheets. This separating mechanism is shown in FIG. , A sub-roller 1 located below the paper sheet conveyance path, a friction roller 2 and a stop roller 3, etc., each sub-roller 1 being part of its outer peripheral surface (approximately 90 degrees).
The high resistance portion 4 made of a material having a high conveyance resistance, such as rubber, is provided at the same position over the range (degree). Sub roller 1
The friction roller 2 located on the downstream side of the arrow roller is rotationally driven in the arrow direction to convey the paper sheet P to be conveyed in the arrow direction while sandwiching the paper sheet P to be conveyed in the nip portion between the stop roller 3 and the stop roller 3. It is rotationally driven with a weak torque in the opposite direction shown by. The high resistance portion 5 on the outer peripheral surface of the friction roller 2 has a frictional resistance higher than the frictional resistance between the sheets of paper, and two or more sheets of paper enter the nip portion in a double-feed state. When the sheet is opened, the lower sheet is conveyed in the forward direction, while the upper sheet is returned.

In the above separating mechanism, the pressing roller is not disposed above the sub-roller 1, which means that when the pressing roller is provided, the skew occurrence rate as shown in (a) can be reduced. This leads to a deterioration in operability, an increase in cost, and an increase in size. However, if the pressing roller is not provided, skew is likely to occur.
As described above, the merit of not arranging the pressing roller to the extent that the pressing roller is not arranged above the sub roller, which is a problem that occurs when the pressing roller is not arranged, is more than compensated for. Since it brings down and downsizing, the structure without the presser roller is very attractive.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and includes a plurality of sub-rollers located below the paper sheet conveying path, having a high resistance portion on the outer peripheral surface thereof, and arranged in the axial direction. In a paper sheet transport mechanism that has a friction roller and a stop roller that are located downstream of the sub-roller group and nipping in a vertical relationship, this occurs because the pressing roller is not arranged above the sub-roller. It is an object of the present invention to provide a skew correction mechanism for a paper sheet that can prevent the skew of the paper sheet that occurs.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention is provided below a substantially horizontal paper sheet conveyance path, has a high resistance portion on a part of an outer peripheral surface thereof, and has a plurality of elements arranged in a direction orthogonal to the conveyance direction. Individually arranged sub-rollers, friction rollers provided on the downstream side of the sub-roller group and having a high resistance portion on a part of the outer peripheral surface, and a plurality of friction rollers arranged in a direction orthogonal to the conveying direction, the friction roller group and the friction roller group. In a paper sheet transport mechanism including a plurality of stop rollers that nipping each other in a vertical position with a transport path sandwiched therebetween, a high resistance portion on the outer peripheral surface of the sub roller located in the center of the sub roller group is Auxiliary friction rollers, which are located on the front side in the rotational direction of the high resistance portion of the sub-roller and have no high resistance portion on the outer peripheral surface, are arranged at both ends of the friction roller group, and are opposed to the auxiliary friction roller. An auxiliary stop roller is arranged at a facing position, and a nipping portion between the auxiliary friction roller and the auxiliary stop roller is used as a fulcrum, and the paper sheet is rotated by the central sub roller to correct skew of the paper sheet. It is characterized by

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. 1 (a) and 1 (b) are a plan view and a front view showing a friction roller type separating mechanism according to an embodiment of the present invention.
And a friction roller 2 and a stop roller 3 and the like. Each sub-roller 1 is provided with a high resistance portion 4 on its outer peripheral surface over a predetermined range (approximately 90 degrees) made of a material having high conveyance resistance such as rubber. . Of the plurality of sub-rollers 1 that rotate integrally, the high-resistance portion 4a of the central sub-roller 1a is advanced a predetermined angle toward the downstream side in the transport direction with respect to the high-resistance portions 4b of the other sub-rollers 1b located on both sides thereof. It is provided at the position.

The friction roller 2 located on the downstream side of the sub roller 1 is rotationally driven in the arrow direction in order to convey the paper sheet P to be conveyed in the arrow direction while nipping it in the nip portion between the friction roller 2 and the stop roller 3. The stop roller 3 is rotationally driven in the opposite direction indicated by the arrow with a weak torque. The high resistance portion 5 on the outer peripheral surface of the friction roller 2 has a frictional resistance higher than the frictional resistance between the sheets of paper, and two or more sheets of paper enter the nip portion in a double-feed state. At the time of opening, the lower sheet is conveyed in the forward direction, while the upper sheet is returned in the opposite direction to the conveying direction.

[0009] The stop roller may be a roller that rotates together to merely provide resistance without reverse rotation. The stop roller 3 is arranged so as to face the small diameter portion 2b located between the large diameter portions 2a of the friction roller 2 which are arranged to face each other as shown in FIG. 2 (a). Although not different from the example, the characteristic configuration of the present invention is that the auxiliary stop roller 11 is coaxially and integrally arranged on the outer side in the axial direction of the stop roller 3, and the auxiliary friction roller 10 is provided immediately below the auxiliary stop roller 11.
It is in the point that it is arranged. The auxiliary friction roller 10 rotates integrally with the other friction roller 2, but does not have a high resistance portion on the outer peripheral surface. That is, in the nip portion between the auxiliary friction roller 10 and the auxiliary stop roller 11 located at both ends, the conveying force is intentionally reduced as compared with the nip portion between the other friction roller 2 and the auxiliary stop roller 3. .

In the above structure, when the paper sheet P is skewed as shown by the solid line in FIG. 1 (a), the stop roller is preceded by the one-sided position of the front edge of the paper sheet. Although it comes into contact with the nip portion between the friction roller 3 and the friction roller 3, in the present embodiment, the auxiliary stop roller 11 and the auxiliary friction roller 10 are arranged on both axially outer sides of the auxiliary stop roller and the friction roller, respectively. The front edge of the leaf comes into immediate contact with the nip portion between the auxiliary friction roller 10 and the auxiliary stop roller 11. As described above, the carrying force at this portion is reduced.

Since the auxiliary friction roller 10 and the auxiliary stop roller 11 do not have a high resistance portion, the paper sheet P that is about to enter the nip portion of both rollers 10, 11.
Does not immediately enter the nip. At this time, of the sub-rollers that give a driving force to the paper sheets in the conveying direction, the high resistance portion 4a of the central sub-roller 1a is the other sub-roller 1b.
Since the conveying force is brought into contact with the paper sheets earlier than the high resistance portion b of the sheet, the skewed paper sheet is fulcrumed at the front edge portion in contact with the nip portion between the auxiliary friction roller 10 and the auxiliary stop roller 11. As a result, it rotates counterclockwise, and finally it can shift to a normal transporting posture shown by a chain line.

That is, according to the present invention, since the auxiliary rollers 10 and 11 are arranged at both axial ends of the separation roller pair consisting of the friction roller 2 and the stop roller 3, the sub roller located on the upstream side is arranged. Even if the paper sheet that has passed through 1 is skewed in any direction, a part of the front edge of the paper sheet comes into contact with the nip portion of the auxiliary friction roller 10 and the auxiliary stop roller 11 and is drawn into the nip portion. Sub-roller 1 in the center while the
By the conveying force from the high resistance portion of a, the paper sheet is rotated around the contact portion, and the end portion on the delayed side can catch up with the end portion on the leading side, so that the paper sheet is finally obtained. The posture is corrected so that the front edge of the paper sheet is oriented in the direction orthogonal to the transport direction, and the paper sheet can always enter between the friction roller 2 and the auxiliary stop roller 3 in the correct posture. Then, by correcting the posture of the paper sheet, the front edge of the paper sheet simultaneously comes into contact with the nip portion between the friction roller 2 and the auxiliary stop roller 3 at the same time. receive.

In the above embodiment, only the roller 1a located at the center in the direction orthogonal to the carrying direction is exemplified as the sub roller preceded by the position of the high resistance portion 4a.
The high resistance portions of two or more rollers located in the center may be preceded.

[0014]

As described above, according to the present invention, a plurality of sub-rollers which are located below the paper sheet conveying path and which are provided with a high resistance portion on the outer peripheral surface and are arranged coaxially in the axial direction, In a paper sheet transport mechanism that has a friction roller and a stop roller that are located downstream of the sub-roller group and nipping in a vertical relationship, this occurs because the pressing roller is not arranged above the sub-roller. It is possible to prevent the skew of the paper sheets to be used.

[Brief description of drawings]

1A and 1B are a plan view and a front view showing the configuration of an embodiment of the present invention.

2 (a) and 2 (b) are a side view and a front view showing a configuration of a main part.

3A and 3B are a plan view and a front view of a conventional example.

[Explanation of symbols]

1 sub roller, 2 friction roller, 3 stop roller, 4a, 4b high resistance part, 5 high resistance part, 10
Auxiliary friction roller, 11 auxiliary stop roller

Claims (1)

[Claims] 1. A sub-roller which is located below a substantially horizontal paper sheet conveyance path, has a high resistance portion on a part of its outer peripheral surface, and is arranged in a plurality in a direction orthogonal to the conveyance direction. Friction rollers that are located on the downstream side and that have a high resistance portion on a part of the outer peripheral surface and that are arranged in plural in the direction orthogonal to the conveying direction are nipped in a vertical positional relationship with the friction roller group sandwiching the conveying path. In a paper sheet conveying mechanism including a plurality of matching stop rollers, the high resistance portion of the outer peripheral surface of the sub roller located in the center of the sub roller group is forward in the rotation direction with respect to the high resistance portions of the other sub rollers. Auxiliary friction rollers having no high resistance portion on the outer peripheral surface are arranged at both ends of the friction roller group, and auxiliary stop rollers are provided at positions facing the auxiliary friction rollers. Of the auxiliary friction roller and the auxiliary stop roller is used as a fulcrum, and the paper sheet is rotated by the central sub-roller to correct the skew of the paper sheet. Skew correction mechanism.