JP2951085B2 - Information recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording apparatus such as a copying machine for recording an image and other information on a recording medium such as recording paper.

[0002]

2. Description of the Related Art A copying machine usually records information such as images and characters recorded on recording paper or the like as it is or after processing it on another recording medium, but the recording medium itself is not stained or stained. The configuration is based on the premise that nonexistent, for example, high-quality blank paper is used.

[0003]

However, in recent years, from the viewpoint of resource saving and the like, as the use of recycled paper has been attempted, the recording property of the recycled paper itself has often become a problem. Is attached as a residue, there is a risk of misreading the record. The present invention has been made in view of such circumstances, and its purpose is to determine the quality of recording paper itself to determine whether or not it is suitable for recording, and to determine a recording medium that is inappropriate for recording.
An object of the present invention is to provide an information recording apparatus which can be removed before recording.

[0004]

An information recording apparatus according to the present invention performs recording by moving a recording medium from a standby position to a predetermined recording position by a transport system, and unloads the recording medium from the recording position when recording is completed. In the information recording apparatus as described above, the reflected light from each portion of the recording medium is detected while the recording medium is transferred from the standby position to the recording position, and reading means for reading pixel information, and determining whether or not the recording medium is appropriate. In the pixel information read by the reading means, when two or more black pixels form a group in a row, counting means for counting the number of black pixels constituting the group, and counting value of the counting means. Determining means for determining the magnitude relationship with the set value, determining means for determining whether or not the recording medium is appropriate, and determining that the recording medium is inappropriate by the determining means. Characterized by comprising a means for removing from the conveyor system before reaching the recording medium to the recording position.

[0005]

According to the present invention, before the recording medium is moved to the recording position, the surface properties are detected by the detecting means, and the suitability as the recording medium is determined by the determining means based on the detected data. Since an appropriate recording medium is to be removed, it is possible to obviate the inconvenience of recording on an inappropriate recording medium and making it impossible to read and reproduce the recording.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to the drawings showing the embodiments. FIG. 1 is a schematic sectional view showing an analog copying machine to which the present invention is applied. In FIG. 1, reference numeral 1 denotes a housing, 2 denotes a document, 3 denotes a scanner, and 4 denotes a photosensitive drum. A scanner 3 is provided at the upper part of the housing 1, and a photosensitive drum 4 is provided at the center of the inside. The original 2 is positioned and placed on the scanner 3 via a glass plate (not shown) or the like. Has become.

The scanner 3 has a light source for irradiating the original, an optical system for capturing reflected light from the original, and a structure for scanning from one end to the other end of the original with light from the light source. Drum 4 that rotates the reflected light from
Are sequentially projected onto the peripheral surface of the photosensitive member, and are exposed to light to form an electrostatic latent image.

The scanner 3 is provided around the photosensitive drum 4.
A toner developing device 5 and a charging device 6 are disposed in a direction in which the photosensitive drum 4 rotates from a position where light is projected from the toner drum 4, and the electrostatic latent image is developed with the toner by the toner developing device 5. This is transferred to the surface of the recording paper P moved below by the transport system 7.

The transport system 7 includes a pair of upper and lower guide plates 8a, 8b,
8c, 8d and a roll 9a of the recording paper P disposed between the guide plates 8a, etc., a conveyor 9b, a pressure roll 9d, and the like. 9a to the paper feed tray 10, and the other end to the paper output tray
Connected to 11. In the apparatus according to the present invention, an optical reading unit for detecting the surface property of the recording paper P, which is located above the moving area of the recording paper P in the transport system 7 and faces the window 8h provided in the guide plate 8a. 12, a switch 13 is disposed between the guide plates 8a and 8b in the transport system 7, and a guide plate for guiding the recording paper P unsuitable for recording selected by the switch 13. 8f and a defective recording paper tray 14 for storing the defective recording paper P.

FIG. 2 is a perspective view of the optical reading unit 12. The optical reading section 12 is composed of CCD elements or the like arranged in a line, and is formed to have a length capable of covering the entire width of the recording paper P in a direction orthogonal to the transport direction of the recording paper P. The surface in the width direction is captured by a CCD element, and is converted into an electric signal for each pixel, for example, according to the brightness, and this is converted to a CP (not shown).
Enter U. In the CPU, the input electric signal is
The data is binarized by comparison processing with a predetermined threshold value, the surface properties of the recording paper P are grasped, and its suitability is determined.

FIG. 3 shows the optical reading unit in the discriminating means.
FIG. 13 is an explanatory diagram showing the result of binarizing the electric signals on the n-th line and the (n + 1) -th line captured in 12, where white portions are hatched with white pixels (referred to as white pixels) and circles with hatching. The portions indicated by て indicate pixels determined to be black (referred to as black pixels). For example, n in FIG.
In the line, the first pixel from the left is a white pixel, 2,
The third pixel is a black pixel.

FIG. 4 is an explanatory view of a part constituting a discriminating means for discriminating whether or not the recording paper P is appropriate based on the data as shown in FIG. 3. FIG. b) indicates the counter 18. The storage unit 15 in the CPU is shown in FIG.
As shown in FIG. 2A, a memory area 16 corresponding to each pixel of two lines captured by the optical reading unit 12 is provided.
Each has a black pixel flag storage area 16a and a group number storage area 16b. As shown in FIG. 3, a black pixel flag storage area 16a and a group number storage area of each memory area 16 corresponding to a pixel that has become a black pixel when binarized.
In 16b, a black pixel flag and its group number are sequentially written.

A black pixel flag storage area 16a of a memory area corresponding to a black pixel in each pixel of each line shown in FIG.
Is set and a flag is stored, and when it is detected that a series of black pixels is detected in the group number storage area 16b, the group number assigned to this portion is written. The counter 18 has two black pixels.
When a group is composed of a plurality of groups, a group number is set each time and the number of black pixels constituting the group is counted.

Next, the operation of the apparatus of the present invention will be specifically described with reference to the flowcharts shown in FIGS. First, the recording paper P is taken into the transport system 7 from the paper feed tray 10 by the jamming roll 9a, and the optical reading unit 12
In the width direction orthogonal to the transport direction,
The lightness is detected for each line and converted into an electric signal (step S1), and based on this, the suitability as the recording paper P is determined (step S2). In the case of non-conforming recording paper P, the fact that recording is to be performed again is displayed (step S3), the non-conforming recording paper P is guided to the defective recording paper tray 14 (step S4), and scanning of the original document is performed again (step S5).

The processing in the discriminating means is as shown in FIG.
The CPU reads the data of one line captured by the optical reading unit 12 into the CPU (step S11), and determines whether or not each pixel is a black pixel (step S12). If it is not a black pixel, it is determined whether or not the determination has been completed for all the pixels for one line (step S13). If not, the process returns to step S12 to repeat the above determination.

If there is a black pixel, a determination 1 is made to determine whether the immediately preceding pixel is a black pixel (step 1).
S14) If it is not a black pixel, determination 2 is made in step S15 to determine whether the corresponding pixel in the line above is a black pixel, and if it is a black pixel, the process proceeds to step S18. If the corresponding pixel in the one line above is not a black pixel in the determination 2, a new group number is provided (step S16), and the counter value of the group is set to +1 (step S17).

For example, referring to the pixel a on the n-th line in FIG. 3, since the pixel a is a black pixel, a flag is set in the black pixel flag memory area 16a of the memory area 16 in the storage unit 15, and the pixel number is set in the group number memory area 16b. Writes the group number. Next, since the pixel immediately before the pixel a is not a black pixel, determination 2 is performed (step S15). In the determination 2, it is determined whether or not the corresponding pixel in the previous line is a black pixel. However, since the previous line does not exist in the storage unit 15, the process proceeds to step S16, where the counter shown in FIG. A “group 1” number is provided, and the counter value is incremented by +1.
And The pixels c and d in the other n lines are substantially the same as the pixels a and b, and the number of “group 2” is provided for the pixel d.

If it is determined in determination 1 that the immediately preceding pixel is a black pixel, the same number as the group number of the immediately preceding pixel is set (step S18), and the counter value of the group is set to +1. (Step S19), Judgment 2 (Step
S20), a determination 3 (step S21) for determining whether the group number of the pixel and the pixel at the corresponding position in the line immediately ahead are the same group number is performed, and the process 1 is performed (step S22). In the process 1, the group number is unified to any one, the values of the counters of both groups are added together, and the group number memory area 16 in the storage unit of FIG.
The group number of b is rewritten accordingly.

For example, the pixel f in the (n + 1) -th line in FIG.
, "Group 3" is set in the same manner as in the pixels b and d, the counter value is similarly increased by +1. Then, in the judgment 2, it is judged whether or not the pixel in the line one immediately above is a black pixel. However, since pixel b in the line one line above is a black pixel, pixel b
It is determined whether it is the same as the group number. Since the pixel b belongs to “group 1” and the pixel f belongs to “group 3”, the group number is rewritten to “group 1”, and the counter value is corrected to be the sum of the respective counter values + 4.

In decision 2 in step S15, it is determined whether or not the corresponding pixel in the next line is a black pixel. If the pixel is a black pixel, the group number of the corresponding pixel in the next line is determined. Set (Step S2
3), the counter value of the group is set to +1 (step
S24). When the above processing is completed for the two lines shown in FIG. 3, the values of the counters are added (step S25), and it is determined whether or not the value is larger than the set value TM. If it is larger than the set value TM, a control signal is output from the CPU to the switch 13, and the switch 13 is set so that the recording paper P is guided to the branch conveyance system. As a result, the defective recording paper P is stored in the defective recording paper tray 14.

Although the above embodiment has been described with respect to a copying machine, various information recording apparatuses such as a printer which uses a recording medium, moves the recording medium to a recording position, performs recording, and unloads the recording when the recording is completed. Of course, it is applicable to all.

[0022]

According to the present invention, in order to determine the suitability of a recording medium, in the pixel information read by the reading means, when two or more black pixels form a group, the number of black pixels constituting the group is counted. And a judgment means for judging the magnitude relationship with the set value based on the count value of the counting means, so that a light-colored recording medium or a plurality of thin lines are provided. A recording medium that is originally inappropriate for recording can be determined to be inappropriate as a recording medium.

[Brief description of the drawings]

FIG. 1 is a schematic longitudinal sectional view of the device of the present invention.

FIG. 2 is a schematic diagram illustrating a detection mode of an optical reading unit.

FIG. 3 is an explanatory diagram showing a result of binarizing a detection value of an optical reading unit.

FIG. 4 is an explanatory diagram of a storage unit and a counter constituting a recording paper discriminating unit in the apparatus of the present invention.

FIG. 5 is a flowchart showing a processing procedure for a defective recording sheet of the apparatus of the present invention.

FIG. 6 is a flowchart showing a processing procedure of a determination means of the apparatus of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Case 2 Document 3 Scanner 4 Photoreceptor drum 5 Toner developing unit 6 Charger 7 Conveying system 8a, 8b, 8c, 8d, 8f Guide plate 8h Window hole 9a Biting roll 9b Conveyor 9d Crimping roll 10 Feed tray 11 Output tray 12 Optical reading unit 13 Switch 14 Defective recording paper tray

Claims (1)

(57) [Claims] 1. An information recording apparatus wherein a recording medium is moved from its standby position to a predetermined recording position by a transport system to perform recording, and is ejected from the recording position when recording is completed. Reading means for detecting reflected light from each part of the recording medium while being transferred to the position, and reading pixel information; and in order to judge the suitability of the recording medium, a black pixel in the pixel information read by the reading means. When two or more groups form a group, counting means for counting the number of black pixels forming the group, and determining whether the set value is larger or smaller based on the count value of the counting means. Means, a determining means for determining whether or not the recording medium is appropriate by the determining means, and transporting the recording medium determined to be inappropriate by the determining means before reaching the recording position. Information recording apparatus characterized by comprising a means for removing from.