JPH0856281A - Facsimile equipment - Google Patents

Abstract

PURPOSE:To provide a facsimile equipment which saves the trouble of print management of stripe patterns and prevents stripe patterns from being read and outputted as black lines from another facsimile equipment on the reception side at the time of reading a document of high transparency by providing a printed matter reflection member along the document read position like a line arranged at right angles to the document running direction. CONSTITUTION:A document running path 13 is constituted between an upper cover 11 and a lower cover 12, and a contact sensor 2 and a roll 3 for the contact sensor face each other with the document running path 13 between them in the direction crossing the document running direction of an arrow A, namely, the document read breadthwise direction. The upper cover 11 is provided with a flexible printed matter reflection member 14 along a document read position B. With respect to this printed matter reflection member 14, plural stripe patterns of two kinds are printed on the surface of a film member of high smoothness to facilitate the print management of stripe patterns.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile machine for reading an original with a contact sensor.

[0002]

2. Description of the Related Art Conventionally, there is a facsimile apparatus in which a reading start of a document 1 is detected by a contact sensor 2 for reading the document 1 provided in a document traveling path, as shown in FIG. The contact sensor 2 is provided so as to face the contact sensor roller 3 with the document traveling path interposed therebetween. For example, the contact sensor 2 has a light receiving element of 8 bits / mm in a line and is provided at a document reading position provided on the document traveling path. Original 1 by inputting reflected light from original 1
Is reading.

The contact sensor roller 3 is made of white rubber or the like, and has black stripes on its surface along the outer periphery as a stripe pattern parallel to the original running direction, as shown in FIG. 7 (A). Four
Is printed or a narrow groove 5 is provided as shown in FIG. 7 (B). As shown in FIG.
The light receiving element 6 corresponding to the black color of the boundary 4a of the
And a light receiving element 7 corresponding to the white color of the boundary 4a of the streak 4 are assigned to the sensor for detecting the start of reading the original 1.

While the light receiving element 6 outputs a voltage below the slice level and the light receiving element 7 outputs a voltage above the slice level, it is determined that there is no document, and the output voltages of the light receiving element 6 and the light receiving element 7 are equal to each other. If both are above or below the slice level, the leading edge of the document 1 can be detected by determining that there is a document, so that the reading of the document 1 is started at this time. Further, the reading of the original 1 is completed when a predetermined time has passed since the sensor provided upstream of the original reading position detected the rear end of the original 1. During this predetermined time, the original 1 travels a predetermined distance and is read.

When the groove 5 of the contact sensor roller 3 is used to detect the start of reading of the original 1, the light receiving element 6 corresponding to the groove side of the boundary 5a of the groove 5 and the roller surface side correspond. When the light receiving element 7 and the sensor for detecting the start of reading the original 1 are placed, the reflected light reflected by the roller surface is input to the light receiving element 7, but the reflected light reflected by the bottom of the groove 5 is filtered. -Since the reflection position is different from that on the surface, the light is not input to the light receiving element 6, and the output voltage of the light receiving element 6 and the light receiving element 7 is equal to or lower than the slice level. For example, both output voltages are above the slice level.

By the way, a sensor for detecting the start of reading the original 1 is used as a light receiving element 6 corresponding to the black color at the boundary 4a of the stripe 4.
And the light receiving element 7 which is adjacent to the light receiving element 6 and corresponds to the white color of the boundary 4a of the streak 4 is assigned so that the front end of the original 1 can be reliably detected even if dust or fine lines are present at the front end of the original 1. This is because On the other hand, the light receiving elements 6 and 7
Therefore, the contact sensor roller 3 in which the boundary 4a of the line 4 is not printed at right angles to the roller shaft 3a is not suitable for detecting the start of reading the original 1.

[0007]

In the conventional facsimile apparatus, if a black line is printed on the surface of the roller for the contact sensor, the line of the line can be printed at right angles to the roller axis. However, since the boundary of ink may cause meandering due to unevenness and bleeding on the rubber roller surface, there is a problem in that print management must be time-consuming.

Further, when a groove is provided on the surface of the roller for the contact sensor, unlike the printing, it is easy to manage the boundary of the groove, but the reflected light from the groove portion is high for an original having high transparency. Since it is not input to the light receiving element, there is a problem that it is output as a black line from the facsimile machine on the receiving side.

According to the present invention, when the manuscript having high transparency is read, the streak pattern is also read when the manuscript having a high transparency is read without any trouble in the print management of the streak pattern provided for detecting the start of reading the manuscript, and the black line from the facsimile apparatus on the receiving side is read. It is an object of the present invention to provide a facsimile device which is not likely to be output as.

[0010]

In order to achieve the above object, the facsimile apparatus of the present invention has a printed matter reflection density that causes a voltage difference in which the output of the contact sensor does not reach the slice level voltage for black and white judgment. Multiple streaky patterns are printed in parallel with the original running direction and printed on a highly smooth surface. A flexible printed material reflecting member is arranged at a right angle to the original running direction across a line-shaped original reading position. It is provided.

[0011]

When the streak pattern configured as described above is printed on the surface of the flexible member, the surface of the flexible member is smooth,
No meandering at the border of the streaks. In addition, the output voltage of the contact sensor that reads the boundary of the streak pattern has unevenness due to the difference in the reflection density of the printed matter, and outputs a voltage that can cause an output change according to the detection of the leading edge of the document. Does not reach

Therefore, according to the present invention, when the manuscript having a high transparency is read without taking the trouble to manage the printing of the streak pattern, the streak pattern is also read and may be output as a black line from the facsimile apparatus on the receiving side. It is possible to provide a facsimile machine without the above.

[0013]

Embodiments of the present invention will be described with reference to the drawings. Elements common to the drawings are given the same reference numerals.

FIG. 1 is a sectional view showing the structure of the essential part of the embodiment. A document traveling path 13 is formed between the upper cover 11 and the lower cover 12, and the document traveling path 13 is closely contacted in a direction intersecting with the direction A of the document, that is, the document reading width direction. Sensor 2 and contact sensor low
It is provided opposite to La3. The contact sensor 2 has, for example, a cell hook lens 2a and a light receiving element 2b in a line shape in the document reading width direction at 8 bits / mm, and the document traveling path 13
The case is provided with a light emitting element 2c for illuminating the document reading position B provided in the case. The light emitting element 2c is at the document reading position B.
To the reflected light of the original 1 and the self-hook lens 2a.
Then, the original 1 is read while being converged on the light receiving element 2b.
The upper cover 11 is provided with a flexible printed material reflecting member 14 over the original reading position B.

As shown in FIG. 2, a plurality of printed material reflecting members 14 are printed on the surface of a film member 15 having a high smoothness by alternately streaking two kinds of streak patterns 16 and 17 in parallel with the arrow A direction. The streak pattern 16 is almost white and the printed matter reflection density is 0.07. The streak pattern 17 is gray and the printed matter reflection density is 0.16. The print width of each line is 0.125m
m. This print width is the limit width that the contact sensor 2 can read. Therefore, when the contact sensor is for the A4 width, the number of streak patterns 16 and 17 printed on the printed material reflecting member 14 is 840 each, and for the B4 width, it is 1028 each.

FIG. 3 is an explanatory view showing the relationship between the reflection density of the printed matter and the output of the contact sensor. Contact sensor output B
(%) Is represented by the following mathematical formula.

LogB = logK-OD (1) where OD is an abbreviation for Optical Density, OD = 0 is the white side, and OD has a large value. Is the black side. When the output B of the contact sensor is almost 100% when O · D = 0.07, O · D = 1.8
At this time, the output B of the contact sensor becomes almost 0%. In addition, the output when the contact sensor 2 determines black and white is B = 70%.
, The printed matter reflection density at that time is OD =
It is 0.23.

Therefore, the contact sensor 2 has the stripe patterns 16 and 17
When reflected light is input from the printed matter reflection densities of 0.07 and 0.16, as shown in FIG. 5, it does not reach the slice level voltage for black and white judgment, but the printed matter reflection densities of 0.07, 0.
A voltage waveform corresponding to 16 is generated. The printed matter reflection density of the streak pattern 17 is set to 0.16 in order to provide a margin in consideration of the sensitivity variation of the contact sensor 2.
Since the pattern shown in FIG. 5 is a pattern that is not possible at the time of reading a document, this pattern is stored and used to detect the start and end of document reading.

Next, the operation will be described. When the original 1 is set in the original insertion port and the transmission switch is pressed while being detected by an optical sensor (not shown), the original 1 travels along the original travel path 13 at a speed faster than the speed at which the original is read. The vehicle moves to the speed document reading position B. During this time,
The contact sensor 2 inputs reflected light from the streak patterns 16 and 17 of the printed material reflection member 14 covering the document reading position B,
A voltage waveform as shown in FIG. 4 is generated.

When the document 1 pushes up the printed material reflecting member 14 and the leading edge of the document 1 reaches the document reading position B, the contact sensor 2 receives the reflected light of the white background of the document 1 and the waveform of the output voltage is as shown in FIG. It becomes constant as shown in. The output of the contact sensor 2 is input to a reading control unit (not shown) to detect a change in this voltage waveform and send an original reading timing signal to a running drive unit (not shown) and a facsimile machine on the receiving side.

Further, the rear end of the document 1 is at the document reading position B.
5 changes from the state shown in FIG. 5 to the state shown in FIG. 4, the reading control unit catches the change in the voltage waveform and stops the transmission of the document reading timing signal. The traveling drive unit accelerates the traveling of the original 1 and moves the original 1 to the arrow A.
Send in the direction.

According to the present embodiment, when the original having high transparency is read, the output from the contact sensor 2 becomes a black and white slice level even if the reflected light from the printed material reflecting member 14 is input. Since the voltage does not reach the voltage, the black line is not output overlaid on the characters read from the receiving facsimile machine.

Further, by setting the time when the rear end of the original reaches the original reading position as the end of the original reading, the sensor for detecting the completion of the original reading, which is conventionally provided, can be eliminated.

[0024]

Since the present invention is configured as described above, it has the following effects.

By printing the streak pattern on the base material having a highly smooth surface, the streak pattern print management is simplified.

In addition, the streak pattern has a printed matter reflection density that causes a voltage difference in which the output of the contact sensor does not reach the slice level voltage for black and white determination.
Even if an original having high transparency is read, it is not output as a black line from the facsimile machine on the receiving side.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a configuration of a main part of an embodiment.

FIG. 2 is a front view showing a printed material reflection member.

FIG. 3 is an explanatory diagram showing a relationship between a printed matter reflection density and an output of a contact sensor.

FIG. 4 is a waveform diagram of an output of a contact sensor before reading an end portion of a document.

FIG. 5 is an output waveform diagram of a contact sensor after reading an end portion of a document.

FIG. 6 is a cross-sectional view showing a configuration of a main part of a conventional example.

FIG. 7 is a front view of a roller for a contact sensor having a conventional streak pattern.

FIG. 8 is an explanatory diagram showing a relationship between a light receiving element and a streak pattern.

[Explanation of symbols]

 2 Contact sensor 3 Roller for contact sensor 14 Printed material reflection member 15 Film 16, 17 Strip pattern

Claims (2)

[Claims] 1. A facsimile machine in which a boundary of a line pattern parallel to a document traveling direction is read by a contact sensor for reading an original when reading the original, and the original reading is started when the output of the contact sensor original changes. In the device, two types of streak patterns with printed matter reflection densities that produce a voltage difference that does not reach the slice level voltage, which is the output of the contact sensor for black and white judgment, are alternated in parallel with the document running direction, and a plurality of smooth patterns are printed on the surface. A facsimile apparatus, wherein a printed printed material reflecting member having flexibility is provided across a line-shaped document reading position arranged at a right angle to a document traveling direction. 2. The facsimile apparatus according to claim 1, wherein the base material of the printed matter reflection member is a film.