JPH0780586B2 - Paper condition detector - Google Patents

Description

The present invention relates to a paper sheet drying apparatus, and more particularly to a detection mechanism suitable for detecting the paper sheet state of circulating banknotes and the like.

[Prior art]

First, a conventional technique of this type of sheet feeding device will be described with reference to FIG.

In FIG. 4, 14 is a paper sheet, which is set in the popper 15. The popper 15 is formed of a bottom plate that supports the paper sheets from the bottom, side plates 12 and 12 ′ that supports the paper sheets from the side, a front guide 10 and a pressing plate 9 that presses the paper sheets 14 against the take-in roller 8. The take-in roller 8 rotates to feed the paper sheet to the delivery roller 7 and the separation roller 6. The fed paper sheets are separated one by one by the sending roller 7 and the separating roller 6 and sent out from the apparatus.

Conventionally, in such a paper sheet feeding mechanism, a paper sheet detection device is provided to detect the presence or absence of paper sheets.

Hereinafter, a paper sheet detection device provided in a conventional paper sheet feeding device will be described with reference to FIG.

Note that, for example, JP-A-58-11443 is related to such a sheet feeding device.

In FIG. 4, reference numeral 1 is a paper sheet detection lever, and in this example, it is arranged so as to detect the paper sheet surface at four points as shown in FIGS. 4 and 6. Since the detection lever 1 is pushed out by the spring 3 from the guide plate 10 before facing the paper sheet, the paper sheet 14 is moved to the fifth position by the paper sheet 14 when being pressed by the pressing plate 9 by the springs 13 and 13 'to the take-in roller 8.
Move to the position 1'in the figure. This displacement causes the detection shaft 2 to rotate and the shutter 4 attached to the detection shaft 2 to move, whereby the optical sensor 5 detects that a sheet is present.

Here, four detection levers are attached to the detection shaft 2 when the folded detection paper sheet such as a circulating bill is inserted as shown in FIG. If the detection lever hits the valley of the folded paper, it is not possible to detect the existence of paper sheets, so a plurality of paper sheets are arranged so that it is possible to detect various types of paper sheets with folding paper that are usually seen. .

[Problems to be solved by the invention]

However, in the above-described conventional paper sheet detection device, since all the detection levers are connected to the single shaft 2, the presence or absence of paper sheets can be detected, but the folding of paper sheets, warpage, etc. are detected. Can not do it.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a paper sheet state detection device capable of detecting the presence or absence of a paper sheet and detecting the state of a paper sheet such as a folded sheet and a sled in a paper sheet feeding device.

[Means for solving problems]

The present invention is a storage means for setting a plurality of paper sheets, a paper sheet delivery means for delivering the paper sheets from the storage means,
It has at least three detection levers for detecting a paper sheet by coming into contact with three or more points in the vicinity of a dividing point where at least the paper sheet is divided into four equal parts on the surface of the paper sheet before feeding out, and the detection lever Each of them is equipped with a sensor that detects its displacement independently.

[Action]

The present invention is provided with a sensor that independently detects the displacement of each of at least three detection levers that come into contact with three or more points in the vicinity of a division point that divides a paper sheet into four equal parts and that detects the paper sheet. Therefore, not only the four-folded paper sheet but also the two-folded paper sheet can detect the surface condition.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a schematic perspective view of a sheet feeding device according to the present invention,
2 and 3 are top views of the hopper.

The hopper 15 includes a pressing plate 9, a front guide plate 10, a bottom plate 11, and a side plate 1.
It is formed by 2,12 '. The paper sheet 14 inserted into the hopper 15 is pressed against the take-in roller 8 by the pressing plate 9, and is fed to the send-out roller 7 and the separation roller 6 by the rotation of the take-in roller 8. The fed paper sheets are separated one by one by the sending roller 7 and the separating roller 6 and sent out from the apparatus. Reference numerals 18A, 18B, and 18C denote paper sheet detection levers, which are provided at three locations near the division point where the paper sheet is divided into four equal parts, as shown in FIGS.

Further, 19A, 19B, and 19C are detection shafts that respectively support the detection levers, and rotate independently of each other by the corresponding detection levers. Further 20A, 20B, 20C said 19A, 19B, 19C
The shutter is attached to the detection shaft of, and the operation is detected by the optical sensors of 21A, 21B, and 21C. Shutters 20A-20B have springs 22A, 22B, 22C respectively.
Is attached and biases the detection levers 18A, 18B, 18C independently in the direction of pressing them against the paper sheet 14. Because of this, the paper leaf
When 14 is pressed against the take-in roller 8 by the pressing plate 9 by the springs 13 and 13 ', the detection levers 18A, 18B and 18C are pushed by the paper sheet 14, and the presence or absence of the paper sheet is detected by the displacement.

The operation of the sheet state detecting device in this embodiment will be described below with reference to FIGS. 2 and 3.

In Fig. 2, four folded paper sheets are hoppers.
When set in 15, the pressing plate 9 is
Through the 3 ', the paper sheet is pressed against the take-in roller 8 with sufficient pressure so that the take-in roller can take in the paper sheet. As shown in FIG. 2, the detection levers 18A, 18B, and 18C have only the detection lever 18A in the valley portion of the fold and cannot detect the sheet. However, the other detection levers 18B and 18C contact the paper sheet and are displaced to detect the paper sheet. In FIG. 3, the central portion of the two folded paper sheets is a valley portion, and only the detected lever 18B cannot detect the paper sheet, and the other detection levers 18A and 18C detect it.

In this way, if the paper sheets are folded, etc., 18A, 18
It can be seen that one of the detection levers of B and 18C does not detect the paper sheet and a folded paper sheet is inserted into the hopper 15.

In addition, in the above-mentioned embodiment, a paper sheet having two folds and four folds is described, but a paper sheet folded in half,
The same effect can be obtained with a torn or warped paper sheet.

Further, in this embodiment, the case where the detection lever and the sensor are three sets has been shown, but the state of the paper sheet can be detected in more detail by combining more detection levers and sensors.

Next, a method of detecting the state of paper sheets according to the present embodiment when the number of paper sheets inserted into the hopper 15 is small will be described.
In the paper sheet feeding device, when the number of inserted paper sheets is small, the pressure of the pressing plate 9 extends the folding behavior of the paper sheets,
Even if the presence or absence of the paper sheet can be detected, there is a possibility that the folding behavior of the paper sheet cannot be detected.

This is because the pressure of the pressing plate 9 is set higher than the pressure for extending the folding behavior of a small number of sheets in order to obtain a sufficient driving force when the sheet is taken in by the take-in roller 8.

In such a case, the pressure of the pressing plate 9 may be switched in two steps. That is, first, when the paper sheet 18A is inserted into the hopper 15, the pressing plate 9 presses the paper sheet 18A against the take-in roller 8A with a pressure lower than the pressure during the take-in operation. At this time, if the paper sheet is folded as shown in FIG. 2 or 3, the state of the paper sheet 14 is detected by the same procedure as described above. Next, when the detected state of the paper sheet matches the take-in condition, the pressing plate 9 switches the pressure for taking in the paper sheet to a high value to take in the paper sheet. As a method of switching the pressure of the pressing plate 9, a known means such as a motor, a cam or a solenoid can be used, although not shown.

〔The invention's effect〕

According to the present invention, in the paper sheet feeding device, not only to detect the presence or absence of the paper sheet in the hopper, such as whether or not the paper sheet before feeding in the hopper is folded or not. Since it is possible to detect the state, it is possible to detect the paper sheet before the paper sheet is fed out, such as a crease that causes an obstacle to the device when the paper sheet is delivered, and it is possible to prevent such an obstacle in advance.

[Brief description of drawings]

FIG. 1 is a perspective view showing the entire sheet feeding device according to an embodiment of the present invention, and FIGS. 2 and 3 are plan views of FIG. 1 and FIG.
FIG. 1 is a perspective view of a sheet feeding device including a sheet detecting device according to the prior art, FIG. 5 is a right side view of the sheet feeding device shown in FIG. 4, and FIG. 6 is shown in FIG. It is a top view of a paper sheet feeding device. 1,18A, 18B, 18C …… Detecting lever, 2,19A, 19B, 19C …… Detecting shaft, 3,22A, 22B, 22C, 13,13 ′ …… Spring, 4,20A, 20B, 20C …… Shutter , 5,21A, 21B, 21C ... Optical sensor, 6 ... Separation roller, 7 ... Sending roller, 8 ... Take-in roller, 9 ... Press plate, 10 ... Front guide plate, 11 ... Bottom plate, 12 , 12 '…… Side plate.

Claims (1)

[Claims] 1. A storage means for setting a plurality of paper sheets, a paper sheet delivery means for delivering paper sheets from the storage means, and at least a paper sheet on the surface of the paper sheet before delivery is divided into four equal parts. Characterized by having at least three detection levers for detecting paper sheets in contact with each of three or more points in the vicinity of the division point, and each of the detection levers being provided with a sensor for independently detecting its displacement. A paper sheet state detection device.