JPS6125283B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an overlapping feed detection device in a paper sheet conveying section such as a bill dispensing machine, for example.

Conventional detection devices of this type include detecting with a micro switch by displacing the axis of the conveying roller according to the thickness of the paper sheet, detecting by the amount of light transmitted through the paper sheet, and using the principle of a condenser. There are methods for detecting changes in capacitance, but either method has drawbacks such as a large number of parts, the need for adjustment, and uncertain detection.

In view of such conventional drawbacks, the present invention provides a simple structure that enables reliable and accurate detection of overlapping feed.

Next, the embodiment shown in the drawings will be described.

Fig. 1 shows the main part of the overlapping feed detection device, in which circular rollers 13 and 14, which rotate in opposite directions as shown by arrows B and C, respectively, are rotated by inserting paper sheets A to be transported in the transport direction A. 13a and 14a, respectively, and the shaft 14a is installed so as to be movable along a groove (not shown) perpendicular to the conveying direction A, and the roller 14 is supported by the roller 1.
3 is configured to be biased in the direction of contact.

Reference numeral 15 denotes a light emitting section serving as an optical sensor, and the light beam X emitted from the light emitting section 15 through the slit plate 17 is irradiated from a side inclined in a tangential direction to the circumferential surface of the roller 14 and is reflected at an angle close to a right angle. The light emitting section 15 is fixedly installed at an oblique position, and the light receiving section 16 is installed at the other side which is the reflection side of the reflected light beam.
The light-receiving elements 16a, 16b, and 16c are arranged in parallel and installed so that each light-receiving element receives the reflected light beam through the slit plate 18, so that the paper sheet A is not inserted between the rollers 13 and 14. In the state of contact, the reflected light beam is received by one of the light receiving elements 16a, and when a sheet of paper A is inserted between them, the direction of reflection of the reflected light beam is different as the roller 14 moves by the thickness thereof. Intermediate light receiving element 16
When two sheets of paper A are overlapped, the roller 14 moves a large amount by the thickness thereof, and the direction of reflection of the reflected light ray changes and the light is received by the other light receiving element 16c. Although each state can be detected, it is also possible to count the number of sheets fed out and conveyed when reflected light is alternately input to the light receiving elements 16a and 16b during normal conveyance. In this way, the present invention pivots one of a pair of rollers that clamps and conveys paper sheets so as not to move, and the other is pivotally supported so as to be movable in a direction perpendicular to the conveyance direction of the paper sheets, Consisting of a light emitting unit that irradiates a light beam from an oblique direction onto the conveying circumferential surface of the movable roller, and at least three light receiving elements that receive the light beam from the light emitting unit reflected on the conveying circumferential surface of the movable roller. of the at least three light-receiving elements of the light-receiving part, the first light-receiving element is in a state where the pair of rollers are not holding any paper sheet. The second light-receiving element is located at a position where the reflected light is detected when the pair of rollers is holding only one paper sheet, and the third light-receiving element is located at a position where the reflected light is detected when the pair of rollers is holding only one paper sheet. Since the pair of rollers are arranged and configured to detect the reflected light when two or more paper sheets are sandwiched between them, the light rays are irradiated onto the conveying peripheral surface of the rollers that pinch and convey the paper sheets. Since the reflected light is detected by the paper sheets being conveyed, the reflective surface of the light beam is constantly cleaned by the paper sheets being transported, making almost no maintenance necessary.Furthermore, the reflected light is received by three light-receiving elements. In addition to detecting overlapping feeds, it is also possible to check the initial state and count the number of sheets conveyed, while also having the effect of simplifying the structure.

FIG. 2 shows a side view of a banknote dispensing machine equipped with an embodiment of the present invention, where A is a sheet of banknote, 1 is a stacker, 2 is a suction head, 3 is a sheet pushing plate, 4 is a delivery belt, 5 is a detector, 6 is an accumulation vehicle equipped with a large number of blades 6a, 7 is a conveyor belt, 8 is a detector, 9 is a saucer, 10 is a shutter, 11 is an opening/closing motor, 1
2 indicates a redirect box.

This banknote dispensing machine is equipped with four stackers 1 each loaded with four types of banknotes and can dispense a total amount of four types of banknotes.
The detection device shown in FIG. 1 is installed in the middle of the final conveyor belt 7 that has been carried out from the four stackers 1.

Therefore, when the sheet A is carried out from each stacker 1 and conveyed by the conveyor belt 7, and the sheet A is not inserted between the rollers 13 and 14, the light beam X reflected on the circumferential surface of the roller 14 is received by the light receiving element 16a, and when one sheet of paper A is inserted normally, the roller 1 is moved by the thickness of the sheet A.
4 moves, the direction of reflection of the light beam X changes, and the light is received by the light receiving element 16b, and each state is detected.

Further, as shown in FIG. 1, when two sheets A are conveyed in an overlapping manner, the roller 14 moves by the thickness of the overlapping portion, and as a result, the direction of reflection of the light ray The light will be received, and overlapping feed can be detected.

In this way, the present invention has two rollers that insert paper sheets to be transported, one of which is pivotally supported so as not to move, and the other is pivotally supported so as to be movable in a direction orthogonal to the paper sheet transport direction, and the movement of the roller is A light emitting part that irradiates reflected light onto the side roller or shaft or the peripheral surface of a circular body that rotates together with the roller is installed in an oblique direction, and a light receiving part is installed in the other side part, and the reflection from the light emitting part is installed. Since it is configured to detect the overlapping feeding of paper sheets by receiving light, it has a simple structure without requiring a large number of parts, requiring adjustment, or making detection uncertain as in the past. It has the advantage of being able to be detected reliably and accurately using reflected light, and can be carried out suitably.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a side view of the main parts, and FIG. 2 is a side view of a banknote dispensing machine equipped with the embodiment of the present invention. A... Paper leaf, 13, 14... Roller, 15...
... Light emitting section, 16... Light receiving section.

Claims (1)

[Claims] 1 One of a pair of rollers that grips and conveys paper sheets is pivotally supported so as not to move, and the other is pivotally supported so as to be movable in a direction perpendicular to the conveyance direction of the paper sheets, and this movable roller is A device capable of detecting overlapping feeding of paper sheets to be conveyed by detecting the amount of movement, comprising: a light emitting unit that irradiates a light beam from an oblique direction onto a conveying peripheral surface of the movable roller; a light-receiving section comprising at least three light-receiving elements that receive light from the light-emitting section reflected on the conveying peripheral surface of a movable roller, and of the at least three light-receiving elements of the light-receiving section; , the first light receiving element is located at a position where the reflected light is detected when the pair of rollers are not holding any paper sheets, and the second light receiving element is located at a position where the reflected light is detected when the pair of rollers are not holding any paper sheets. A third light-receiving element is located at a position that detects the reflected light when only one sheet of paper is being held, and detects the reflected light when the pair of rollers is holding two or more sheets of paper. 1. An overlapping feed detection device in a paper sheet conveyance section, characterized in that the device is arranged at different positions.