JPH0546111Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a passbook detection device used in an automatic passbook entry device that automatically records and prints passbooks.

(Prior Art) FIG. 3 is a diagram illustrating one configuration example of a passbook detection device used in a conventional automatic passbook recording device, and FIG. 4 is a diagram illustrating a form. In FIG. 3, reference numerals 1a and 1b are transmission type sensors for detecting the end of the bankbook, which are provided facing each other above and below the running path 3 of the bankbook 2. 4 is a drive belt that drives the bankbook 2; 5 is a reflective photoelectric detector that includes a light emitting element and a light receiving element and reads page marks 6 and printed lines 7 (FIG. 4) on the bankbook 2 based on the output of the light receiving element; It is.

In the automatic passbook recording device equipped with the passbook detection device configured as described above, when the passbook 2 is run on the running path 3 by the drive belt 4, one end of the passbook 2 passes between the transmission type sensors 1a and 1b. The end of the bankbook is thereby detected. In addition, when determining the next page to be printed or the line to be printed on the bankbook, a reflective photoelectric detector is used to accurately read the page mark 6 and printed line 7 as shown in FIG.

(Problems to be solved by the invention) However, with the above-mentioned passbook detection device,
Since the transmission type sensor 1 detects one end of the passbook 2,
As shown in FIG. 3, it is necessary to adjust the dimension L between the transmissive sensor 1 and the reflective photoelectric detector 5, and the transmissive sensors must be installed separately on both sides of the travel path. There was a problem.

Therefore, the purpose of the present invention is to solve the above-mentioned problems, and to provide a passbook detection device that can easily perform both passbook edge detection and page/printed line detection with one detector. It is said that

(Means for Solving the Problems) According to the present invention, there is provided a detection area in the travel path of the passbook and has a reflectance of approximately black level, which is lower than the reflectance of the passbook, and a light emitting light that illuminates the detection area. a first slicer that inverts the output when the output from the light receiver exceeds a first slice level close to a voltage corresponding to a black level; A differentiator that differentiates the output of the first slicer and outputs a passbook edge detection signal, and a printed line detection signal that is inverted when the output from the light receiver falls below the second slice level, which is close to the voltage corresponding to the white level. A passbook detection device is provided, which includes a second slicer that outputs a second slicer.

(Function) When there is no passbook in the detection area, an output corresponding to approximately the black level is obtained from the light receiver, so the outputs of the first slicer and the second slicer are not inverted. When the passbook approaches the detection area and the output of the light receiver reaches a value close to the white level, the output of the first slicer is inverted because the first slice level is set to a value close to the voltage corresponding to the black level. As a result, a passbook edge detection signal is output from the differentiator. In the case of a white bankbook, the output of the second slicer is also reversed at the same time. When the passbook travels further and reaches a page mark or printed text, the second slice level is set to a value close to the voltage corresponding to the white level, so only the output of the second slicer is inverted and printed. A completed line detection signal is output.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1a is a diagram showing the configuration of a bankbook detection device according to this embodiment, and FIG. 1b is a block diagram showing the configuration of a reflection type photoelectric detector.

In FIG. 1a, the passbook detection device is constructed by painting the entire surface of the running path 3a of the passbook 2 black and disposing a reflective photoelectric detector 5a above it.

As shown in FIG. 1b, the reflective photoelectric detector 5a includes a light emitter 8, a light receiver 9 that receives reflected light emitted from the light emitter 8, and an amplifier that amplifies the output of the light receiver 9. 10, and a slicer 1 that slices the output of the amplifier 10 at slice level voltages V1 and V2.
1 and 12, and differential shapers 13 and 14 that shape the waveform of the output sliced by the slicers 11 and 12.

Next, the operation of this embodiment will be explained with reference to FIG.

FIG. 2 is a diagram showing signal waveforms at various parts of the reflective photoelectric detector, and a, b, and c in the diagram correspond to the locations indicated by , and in FIG. 1b.

First, in detecting the bankbook end, the slice level voltages V1 and V2 of the slicers 11 and 12 are set. As shown in FIG. 2a, the slice level V1 is close to the value when there is nothing on the travel path 3a, that is, when the output of the light receiver 9 (or amplifier 10) is at the black level. This makes it possible to detect even the slightest white level (a level that can be detected even on the edge of a passbook dirty with hand grime). Also,
The slice level V2 is set to a value close to the value when the passbook is present on the travel path 3a, that is, when the output of the light receiver 9 is at a white level, so that even a slight black level can be detected. For this reason,
It is used to read the page marks 6 and printed lines 7 of the bankbook 2. The slice level voltages of the slicers 11 and 12 are set as described above.

Next, until the bankbook 2 travels to the detection area directly below the reflective photoelectric converter 5a, the reflective photoelectric converter 5a detects the black level of the travel path 3a. Therefore, as shown in FIG. 2a, the amplifier 10
The output voltage is smaller than the slice level voltage V1 of the slicer 11, and the differential shaper 13 outputs a bankbook edge detection signal indicating that the bankbook edge has not been detected.

When the bankbook 2 reaches the detection area, the reflective photoelectric detector 5a detects the white level at the tip of the bankbook.
That is, as shown in FIGS. 2a and 2b, the output voltage of the amplifier 10 is equal to the slice level voltage of the slicer 11.
It becomes larger than V1, indicating that the bankbook edge has been detected by the differential shaper 13 (has a pulse)
A bankbook edge detection signal is output, allowing the bankbook position to be confirmed.

Further, the reflective photoelectric detector 5a outputs a page/print detection signal when a page mark 6 or a printed line 7 is located in the detection area. This is because, as shown in FIGS. 2a and 2c, the output voltage of the amplifier 10 becomes smaller than the slice level voltage V2 of the slicer 13, and a signal indicating page mark 6 or printed line 7 is output from the shaper 14. Ru. This page/printed detection signal is treated as valid only while the bankbook end detection is being performed.

As described above, according to this embodiment, the bankbook edge can be easily detected, and there is no need to provide transmission type sensors (see FIG. 3) above and below the running surface as in the conventional case.

Furthermore, the reflective photoelectric detector can detect not only the edge of a passbook, but also page marks and printed lines, so it is possible to use a reflective photoelectric detector and a transmissive sensor (Fig. 3) as in the past. There is no need to adjust the dimension L, that is, the bankbook position and the reading position of page marks or printed lines.

Further, in this embodiment, the entire surface of the traveling path 3a is painted black, but the present invention is not limited to this, and only the detectable area of the reflective photoelectric detector 5a may be painted black.

Further, in this embodiment, the running path 3a is painted black, but the color is not limited to black, and may be a color that has a reflectance different from that of the passbook and can be detected.
Instead of painting it black, another black material may be used, or the detection area of the reflective photoelectric detector 5a may be omitted.

In this embodiment, the target is a passbook in an automatic passbook recording device, but the present invention is not limited to this, and it is also possible to target a recording medium other than a passbook.

(Effects of the invention) As explained in detail above, according to the invention, there is a detection area that is provided in the travel path of the passbook and has a reflectance of almost black level, which is lower than the reflectance of the passbook, and this detection area is illuminated. a light emitter that receives reflected light from the illumination and converts it into electricity; and a first slicer that inverts the output when the output from the light receiver exceeds a first slice level close to a voltage corresponding to a black level. , a differentiator that differentiates the output of the first slicer and outputs a passbook edge detection signal, and a printed line that is inverted when the output from the photodetector falls below a second slice level that is close to the voltage corresponding to the white level. Since it is provided with a second slicer that outputs a detection signal, it is possible to perform both bankbook edge detection and page/printed line detection with one detector, resulting in a very simple configuration.

Furthermore, since bankbook edge detection is performed at the first slice level that is close to the voltage corresponding to the black level, and printed line detection is performed at the second slice level that is close to the voltage corresponding to the white level, it is possible to It is possible to reliably detect the edge of a passbook even when the surface is slightly white, and it also reliably detects page marks and printed characters that are slightly black due to thin ink density or blurring. can do. Therefore, reading accuracy and reliability can be significantly improved.

Furthermore, since the first slice level for passbook edge detection is close to the voltage corresponding to the black level, the response speed when the passbook edge is inserted is very fast, and there is no time lag, so in that sense, the reading accuracy is also improved. can be improved.

[Brief explanation of the drawing]

Figure 1a is a perspective view showing the configuration of a passbook detection device according to an embodiment of the present invention, Figure 1b is a block diagram showing the configuration of a reflective photoelectric detector, and Figure 2 is a signal waveform of each part of the photoelectric detector. 3 are diagrams showing the configuration of a conventional passbook detection device, and FIG. 4 is an explanatory diagram of a passbook. 1a, 1b...transmission type sensor, 2...passbook,
3, 3a... Running path, 4... Drive belt, 5, 5
a... Reflective photoelectric detector, 11, 12... Slicer.

Claims (1)

[Scope of utility model registration request] a detection area that is provided on the travel path of the passbook and has a nearly black level reflectance lower than the reflectance of the passbook; a light emitter that illuminates the detection area; and a light receiver that receives reflected light from the illumination and converts it into electricity. and the output from the receiver is close to the voltage corresponding to the black level.
a first slicer whose output is inverted when the slice level exceeds the slice level; a differentiator that differentiates the output of the first slicer and outputs a passbook edge detection signal; and an output from the light receiver that corresponds to the white level. A passbook detection device comprising: a second slicer that outputs a printed line detection signal that is inverted when the voltage falls below a second slice level close to the voltage.