JP2536586Y2 - Paper sheet detector - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic ticket vending machine, an automatic settlement machine, and other various automatic vending machines into which paper sheets such as 1,000 yen bills and 5,000 yen bills are inserted. The present invention relates to a paper sheet detecting device installed in a paper sheet processing machine such as a paper machine. 2. Description of the Related Art Heretofore, a paper sheet detecting device comprising a photoelectric element for detecting an inserted state of a paper sheet is provided at a paper sheet insertion port of a paper sheet compatible processing machine of this kind. (For example, JP-A-63-148393). This paper sheet detection device detects the presence or absence of a paper sheet from a change in output level caused by the light sheet inserted into the insertion slot blocking the light beam of the photoelectric element, and when the paper sheet is detected. By driving the transport mechanism, the sheets inserted into the insertion slot are taken into the sheet-compatible processing machine. However, the above-mentioned conventional paper sheet detecting device detects the presence or absence of a paper sheet from a change in the output level of the photoelectric element, so that it malfunctions. was there. This is because the sheet detector does not completely block light due to the nature of the sheet even if the sheet blocks the light beam (light flux) of the photoelectric element. Is set to detect that the paper sheet has been inserted into the insertion slot when the rate reaches the rate, and the light receiving unit of the photoelectric element is provided with an external light beam where a paper sheet-compatible processing machine is installed. Is also received.
That is, since the amount of light received by the light-receiving portion of the photoelectric element includes the amount of light from the light-emitting portion of the photoelectric element and the amount of light from the outside, if the change in the amount of light from the outside exceeds a predetermined value, paper sheets are inserted. As a result, erroneous detection is performed in the same manner as when the amount of received light is reduced. In order to prevent such inconvenience, for example, it is conceivable to use a sensor of a discriminator for discriminating the authenticity of a paper sheet as disclosed in Japanese Patent Application Laid-Open No. 64-9586. It is not advisable to use a high-grade sensor because the cost is high. Accordingly, the present invention has been made to eliminate the above-mentioned drawbacks, and an object of the present invention is to provide a paper sheet detecting apparatus which is not affected by a change in the amount of external light. [0006] In order to achieve the above object, the present invention is provided at an insertion port of a paper sheet-compatible processing machine such as an automatic ticket vending machine into which paper sheets are inserted. A first sensor composed of a photoelectric element, detecting means for detecting a state of insertion of the paper sheet into the insertion slot from a change in the output level of the first sensor, and the paper sheet processing machine; It is characterized by having a second sensor for detecting the amount of light in the environment and adjusting means for increasing or decreasing the detection level of the detection means in accordance with an increase or decrease in the output level of the second sensor. In the above arrangement, when the amount of external light changes, the output level of the second sensor changes. The adjusting means increases or decreases the detection level of the detecting means by increasing or decreasing the output level of the second sensor, whereby the detecting means detects sheets without being affected by an external light amount change. An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of a paper sheet insertion slot of an automatic ticket vending machine, and FIG. 2 is a sectional view taken along line AA of FIG. The cover 2 on the customer service side of the automatic ticket vending machine 1 is provided with an insertion slot 4 for paper sheets provided with a table 3, and the inside of the automatic ticket vending machine 1 facing the insertion slot 4 is shown in FIG. A transport mechanism 7 including a pinch roller 5 and an endless belt 6 for transporting the paper sheet to a paper sheet discriminator that does not need to be provided. The first sensor 8 comprises a pair of photoelectric elements provided at predetermined intervals in the width direction of the insertion slot 4, the light emitting portion 8 a of the photoelectric element being on the cover 2 side, and the light receiving portion 8 b being on the table 3. The light emitting portion 8a and the light receiving portion 8b are provided with a gap through which paper sheets can be inserted. The second sensor 9 is provided on the cover 2 near the insertion port 4.
And is constituted by a light receiving section of a photoelectric element. In FIG. 3, C is a controller for controlling the automatic ticket vending machine 1. FIG. 3 is a schematic configuration diagram showing an electrical configuration of a portion relating to the first sensor 8 and the second sensor 9 among them. ing. That is, the first sensor 8 and the second sensor 9 are connected to the amplifiers 10 and 11, respectively.
Outputs of 0 and 11 are input to the adder circuit 12. The output of the addition circuit 12 is input to the detection circuit 13, and the output of the amplifier 10 is input to the detection circuit 13. Next, the operation of the apparatus of this embodiment will be described. When the automatic ticket vending machine 1 is operated, the outputs from the first sensor 8 and the second sensor 9 are amplified through the amplifiers 10 and 11, respectively, and then input to the adding circuit 12. That is, the output corresponding to the sum of the amount of light caused by the light emitting portion 8a of the first sensor 8 and the amount of external light sensed by the first sensor 8 is output to the adder circuit 12 and the amount of external light sensed by the second sensor 9 The output corresponding to the amount of light is input to the detection circuit 13. The detection circuit 13 detects an input level input from the first sensor 8 at a predetermined threshold value to detect a sheet. The threshold value is adjusted by the input amount from the addition circuit 12 described above. Is done. That is, the threshold value is adjusted so as to increase as the input amount from the adding circuit 12 increases, and to decrease as the input amount from the adding circuit 12 decreases. That is, the threshold value changes in proportion to the output amount of the adder circuit 12. When the detection circuit 13 detects a sheet,
As in the case of a conventional automatic ticket vending machine, a driving signal for driving the transport mechanism 7 is transmitted. Therefore, the paper sheets in the insertion slot 4 are taken into the automatic ticket vending machine 1. As described above, in this embodiment,
Since the detection level of paper sheets is adjusted according to the amount of light outside the place where the automatic ticket vending machine is installed, the inconvenience of erroneous detection due to a change in the amount of light outside is eliminated. In the above-described embodiment, an example of an automatic ticket vending machine has been described as a paper sheet-compatible processing machine, but it is a matter of course that an automatic checkout machine or another vending machine may be used. . According to the present invention, the detection level of paper sheets is adjusted by the amount of light in the environment where the paper-compatible processing machine is installed. The disadvantage of erroneous detection is eliminated.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a longitudinal sectional view of an insertion slot portion of a paper sheet of an automatic ticket vending machine. FIG. 2 is a sectional view taken along line AA of FIG. FIG. 3 is a schematic configuration diagram showing an electrical configuration. [Explanation of Signs] 1 Automatic ticket vending machine (sheet processing machine) 4 Insertion port 8 First sensor 9 Second sensor 12 Addition circuit (adjustment means) 13 Detection circuit (detection means, adjustment means)

Claims (1)

(57) [Claims for Utility Model Registration] A first sensor comprising a photoelectric element provided at an insertion slot of a paper sheet-compatible processing machine such as an automatic ticket vending machine into which paper sheets are inserted;
Detecting means for detecting a state of insertion of the paper sheet into the insertion slot from a change in the output level of the first sensor; and a second means for detecting the amount of light in the environment where the paper sheet processing machine is installed.
A sheet detecting apparatus comprising: a sensor; and an adjusting unit that increases or decreases the detection level of the detecting unit in accordance with an increase or decrease in the output level of the second sensor.