JPH03238578A - Document operation system - Google Patents

Abstract

PURPOSE:To prevent a document from being missent by detecting the position of a front/rear side discriminating mark on a document by a change in the quantity of transmitted light and detecting the double feeding, front/rear inverse feeding, or inverse direction setting of the document from the change. CONSTITUTION:A sensor 4 for detecting the transmitted light quantity of a carried document 2 is arranged on the position for detecting the front/rear side discriminating mark 9 on the document in order to detect the position of the mark 9 in addition to the detection of double feeding. When the document 2 is correctly set up and carried, the correct setting and carrying of the document 2 can be detected by detecting the mark 9. Thus, the discrimination of the double feeding, the front/rear discrimination and the detection of the feeding direction of the document 2 can be executed without increasing the number of hardware.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a form handling method, and is particularly suitable for detecting duplicate feeding of forms and setting errors, and detection of duplicate sheet feeding of forms, determination of front and back sides of forms, and feeding direction. The present invention relates to a form handling method that enables detection using a single transmitted light amount sensor.

[Prior art] As a conventional detection device of this type, for example, the one disclosed in Japanese Patent Application Laid-open No. 60
A device disclosed in Japanese Patent No. 11983 is known.

This device uses a sensor that detects the amount of transmitted light to determine the thickness of the form (including duplicate sheet feeding), and a separate sensor that detects the amount of reflected light to determine whether or not there is printing on the surface of the form. By making this determination, it was possible to determine whether the form was front or back and to detect the feeding direction.

Note that the method of determining the thickness of a form using a sensor that detects the amount of transmitted light and detecting duplicate feeding of forms is as follows:
In addition to this, there is a method disclosed in Japanese Unexamined Patent Publication No. 56-82989.

[Problems to be Solved by the Invention] In the above-mentioned prior art, a sensor of a transmitted light amount detection type and a sensor of a reflected light amount detection type are provided in order to detect the amount of transmitted light and the amount of reflected light. /D
Two conversion circuits are required for each, which poses a problem in that the amount of hardware increases.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to solve the above-mentioned problems in the conventional technology, and to determine whether duplicate sheets of paper are being fed without increasing the amount of hardware. An object of the present invention is to provide a form handling method capable of determining the front and back sides of a form and detecting the feeding direction.

[Means for Solving the Problems] The above-mentioned object of the present invention is to provide a sensor for detecting the amount of transmitted light of a transported form and a means for converting the output of the sensor into a digital signal, and to detect the thickness of the form based on the amount of transmitted light. In a form handling device having a function of determining whether
A form handling method characterized in that means is provided for detecting the position of the front/back identification mark on the form based on a change in the amount of transmitted light, and double feeding, reverse feeding, or setting in the reverse direction of the form is detected from the change in the amount of transmitted light. achieved by.

[Function] In the form handling method according to the present invention, the sensor that detects the amount of transmitted light of the transported form not only detects duplicate feeding as in the conventional method, but also uses the sensor to identify the front and back sides of the form. By providing a mark at the detection position, if the form is set correctly and being conveyed, by detecting the mark for front and back identification, it can be determined whether the form is being correctly set and conveyed. It is also possible to detect

As a result, without increasing the amount of hardware,
It is possible to realize a form handling method that is capable of determining whether duplicate sheets of a form are fed, determining whether the front or back side of a form is present, and detecting the feeding direction. Note that if it is determined that two or more documents are being transported in duplicate, it may be impossible to check the direction in which the documents are set, but in this case, the check itself is meaningless. Therefore, it is not a problem.

[Example] Hereinafter, an example of the present invention will be described in detail based on the drawings.

FIG. 1 is a diagram showing an outline of a form dispensing device which is an embodiment of the present invention. In the figure, ■ is the hopper, 2 is the second
A form with a mark 9 (hereinafter simply referred to as "mark") for identifying the front and back as shown in the figure printed in advance, 3 a feed roller, 4 a sensor, 5 an amplifier circuit, 6 an A/D converter,
Reference numeral 7 indicates a thickness determination circuit, and 8 indicates a mark determination circuit.

The form 2 fed out from the hopper 1 is conveyed by a feed roller 3. At this time, the signal proportional to the amount of light transmitted through the form by the sensor 4 is amplified by the amplifier circuit 5 and then
The D converter 6 converts the signal into a digital signal.

If the form 2 with the above-mentioned mark is set correctly in the hopper 1, that is, the front and back sides and the front and back feeding directions are set correctly, two sheets will be duplicated compared to when only one form is fed from the hopper 1. The amount of transmitted light data when fed out has a waveform as shown in FIG. 3 as ``11 sheets'' or ``2 sheets''.

As described above, this signal is amplified by the amplifier circuit 5, then converted into a digital signal by the A/D converter 6, and input to the thickness determination circuit 7 and mark determination circuit 8.

The thickness determination circuit 7 determines from the digitized transmitted light amount data, for example, whether or not there are a predetermined number or more of values that are equal to or less than the transmitted light amount corresponding to the conveyance of one form, which is set in advance. Based on the algorithm, it is determined whether one form is being conveyed or not, and the result is output. When two documents are being conveyed in duplicate, the amount of transmitted light is as shown in Figure 3 (
As shown in Figure 2), the output changes significantly, so this can also be determined using the same algorithm as above.

Similarly, the mark determination circuit 8 determines whether or not there are a predetermined number or more of values equal to or less than the transmitted light amount value of the mark portion corresponding to the conveyance of one form, based on the digitized transmitted light amount data. It is determined whether the form is in a normal conveyance state using an algorithm such as determining whether the form is being conveyed normally or not, and the result is output.

FIG. 4 shows the base of the above judgment in the mark judgment circuit 8.
A mark detection signal corresponding to a case where one document is transported with the front and back surfaces and the front and rear feeding directions set correctly is shown. The mark determination circuit 8 determines the position of the mark from this signal with reference to the amount of light transmitted through the white portion of the form.

Note that when multiple forms 2 are set in the hopper 1 upside down (strictly speaking, with the forms turned over in the transport direction), when only one form is fed out from the hopper 1, The transmitted light amount data has a waveform shown in FIG. 5(a).

In this case, the thickness determination circuit 7 determines that one form is being conveyed using the above-mentioned algorithm, and outputs this. Further, the mark determination circuit 8 determines whether the form is not in a normal conveyance state using the above-mentioned algorithm, and outputs the result.

The reference in this case is the mark detection signal shown in FIG. 5(b), and by comparing it with the signal in FIG.
It is possible to determine that the form is in the above-mentioned upside-down state in which the form is turned over in the transport direction.

Note that if the form is set upside down with the form turned over in a direction perpendicular to the conveying direction, the mark detection signal shown in FIG. 5(b) will not be detected, so the mark judgment In circuit 8, according to the above algorithm,
It can be determined whether the form is not in a normal conveyance state or whether a normal form is not set.

According to the above embodiment, the sensor that detects the amount of transmitted light of the conveyed form not only detects duplicate feeding, but also detects the mark when the form is correctly set and conveyed. It is possible to detect whether or not the form is correctly set and transported.

As a result, without increasing the amount of hardware,
It is possible to realize a form handling method that is capable of determining whether duplicate sheets of a form have been sent, determining whether the form is front or back, and detecting whether or not a sheet has been fed. Note that if it is determined that two or more documents are being transported in duplicate, it may be impossible to check the direction in which the documents are set, but in this case, the check itself is meaningless. Therefore, what is not a problem is that
As mentioned above.

It should be noted that the above example shows an example of the present invention, and the present invention should not be limited thereto.
Needless to say.

[Effects of the Invention] As described above in detail, the present invention includes a sensor for detecting the amount of transmitted light of a transported form and a means for converting the output of the sensor into a digital signal. In a form handling device having a function of determining the thickness of a form, there is provided means for detecting the position of the mark on the form based on a change in the amount of transmitted light from the output of the converting means regarding the form having a mark, and from the change in the amount of transmitted light, the position of the mark on the form is detected. We have developed a form handling method that can detect duplicate sheet feeding, front/back judgment, and feed direction detection without increasing the amount of hardware required to detect duplicate feeding, reverse feeding, and setting in the reverse direction. This has the remarkable effect of being achievable.

[Brief explanation of drawings]

Fig. 1 is a diagram showing an outline of a form dispensing device which is an embodiment of the present invention, Fig. 2 is a perspective view of a form on which marks are printed in advance to identify the front and back sides, and Fig. 3 is a diagram showing transmitted light amount data. Figure 4 shows an example. Figure 4 shows the mark detection signal when the form is set correctly. Figure 5 shows the transmitted light amount data and mark detection signal when the form is set upside down. It is. l: hopper, 2: form, 3. Feed roller, 4: sensor,
5: Amplification circuit, 6: A/D converter, 7° thickness determination circuit,
8. Mark determination circuit, 9. Mark for front and back identification. Figure 4 Figure Figure Time Figure (a) (b)

Claims (1)

[Claims] 1. Equipped with a sensor that detects the amount of transmitted light of the transported form and a means for converting the output of the sensor into a digital signal,
In a form handling device having a function of determining the thickness of a form based on the amount of transmitted light, the position of the front and back identification marks on the form can be determined based on a change in the amount of transmitted light from the output of the conversion means regarding the form having a front and back identification mark. A form handling method characterized by providing a detection means and detecting duplicate feeding, reverse feeding, and reverse direction setting of a form based on changes in the amount of transmitted light.