JPH01120956A - Reader - Google Patents

Abstract

PURPOSE:To detect the tip of an original by providing a pattern of an optional width reading a black level at the outer periphery of a white roller. CONSTITUTION:A read roll 12b is made of a material such as white silicone and grooves 14a-14c having a different width (e.g., 2, 3, 5mm) at a prescribed depth are provided at the outer periphery. The position of the grooves 14a-14c is set inward more than the position corresponding to a minimum original width. The prescribed depth is a depth read as a black level by an image sensor 50, that is, the depth at the outside of the read focus. A detection section 15a detects a change in the image data from the state of the image sensor 50 reading the image data of the grooves 14a-14c till the tip of the original 1a to be carried and informs it to a tip read control section 16. The tip read control section 16 gives a command of the tip detection to the detection section 15a and commands the feeding stop of a read roller 12b to the feeding mechanism control section 4a based on the result of the detection of the detection section 15a.

Description

[Detailed Description of the Invention] [Summary] The present invention relates to a reading device that uses a white roller provided with grooves to read the leading edge of a document to be sent and can detect the leading edge of a document based on a change in image data. This reading device consists of a roller with a white surface and a reading means that is provided facing the roller and reads the image of the document in close contact with the document being transported by the roller. At least one pattern is provided inside the position corresponding to the width of the original on the outer periphery of the roller, and a pattern of an arbitrary width that can be distinguished from the white part of the original by reading by the reading means, and a pattern corresponding to the width of the original on the outer periphery of the roller. When the leading edge of the original is read by the reading means by transporting the original from a state where the image data of the pattern is being read by the reading means, and the image data of the pattern is read by the reading means. and detection means for detecting changes in image data,
Based on the detection by the detection means, the roller feeding is temporarily stopped to wait for a reading command to read the original.

[Industrial application field]

The present invention relates to a reading device used in a facsimile (hereinafter referred to as FAX) device, etc., and in particular, the leading edge of a set document can be detected by a change in read image data using a white feed roller provided with a pattern. This relates to a reading device.

BACKGROUND OF THE INVENTION In recent years, FAX communication has become popular in which a document, figure, etc. is transmitted to a remote location using a communication line. FAX communication is a process in which sending and receiving devices between users are usually connected through a switchboard and a communication line such as a subscriber telephone line, and document communication is performed between users. The document is reproduced by recording it on the side.

As the use of FAX has increased, portable devices that wirelessly transmit read image data are being developed and put into practical use, and it is desired that such devices be made smaller and lighter.

[Conventional technology]

FIG. 5 shows a block diagram of the FAX machine. Since the FAX machine is equipped with a sending/receiving function, the functions of the sending side and the receiving side will be explained using the same figure.

First, when sending the original 1a, an operator on the sending side sets the original 1a in the apparatus and inputs the recipient's telephone number etc. from the operation panel 3.

Then, when the reception station is called and ready for reception, the feed mechanism control section 4α is activated under the control of the main control section 2, and the document 1a is sent out by the feed roller R, for example, to a reader equipped with a contact type image sensor 5o. The document 1a is read in the section 5a, and the read image data is binarized and stored in the image buffer 6, outputted page by page, and then sent to the compression section 7.
After being compressed, the data is sent from the transmitting/receiving section 8 to the line for the receiving station.

On the receiving side, the received image data is expanded by an expansion section 9 and recorded on recording paper by a recording section 1o.

Here, the method of transporting and reading the original 1a will be explained with reference to the side view of FIG.

As shown in the figure, a contact type image sensor 5o having a reading width sufficient to read the maximum document width is in contact with a reading roller 12a made of, for example, white silicone, and a feed roller R and a sensor S are in contact with each other. 50, that is, on the left side in the figure, the sensor S detects the leading edge of the document 1a inserted from the surface of the guide 13 and transported by the feed roller R, and the feed by the feed roller R is temporarily stopped. When a reading command is received, it is sent out again.

The original 1a is sent between the image sensor 50 and the reading roller 12a, and the image sensor 50 scans the original in the main scanning direction and the sub-scanning direction to read the image.

[Problem that the invention seeks to solve]

According to the above conventional method, the image sensor 50 of the reading section 5
The device is equipped with a sensor S and a feed roller R in front of the device, and there is a need for a smaller/lighter device and lower cost to make the device more portable.Therefore, there is a need for a method to reduce the number of parts that can meet these demands. The problem is that it is being done.

An object of the present invention is to provide a reading device that can be made smaller and lighter.

In the figure, ■ is the original, 5 is the reading means, 12 is a roller with a white surface, and 14 is a small number (both are provided) inside the position corresponding to the width of the original 1 on the outer periphery of the roller 12. A pattern of an arbitrary width that can be distinguished from the white part by reading by the reading means, 15 is a state in which the image data of pattern 14 is being read by the reading means 5, and when the leading edge of the original 1 is read by the reading means 5 as the original 1 is transported. This is a detection means for detecting changes in image data.

Therefore, based on the detection by the detection means 15, the feeding of the roller 12 is temporarily stopped and the apparatus waits for a reading command to read the original 1.

The detection means 15 detects the change. Based on this detection, the feeding of the roller 12 is temporarily stopped, and the feeding of the roller 12 is performed again in response to a document reading command.

In this way, the leading edge of the document can be detected without the need for a feed roller or sensor as in the conventional example, so the apparatus can be made smaller and lighter.

〔Example〕

An embodiment of the present invention will be explained with reference to FIGS. 2 and 3.

The same reference numerals indicate the same objects throughout the figures. Further, in FIG. 2, parts corresponding to those in FIG. 1 are surrounded by a dashed line.

FIGS. 2(a) and 2(bl) show the reading roller and the reading unit of the embodiment. In the figure, the reading roller 12b is made of, for example, white silicon, and has different widths (
For example, grooves 14a to 14c of 2.3.5 mm) are provided.

The positions of the grooves 14a to 14C are set inside the position corresponding to the minimum document width.

Here, the predetermined depth is the depth that is read as black by the image sensor 50, that is, the depth that is out of focus of the reading. The focus of reading is set on the surface of the original 1a, but the paper thickness is, for example, 0. fin, and the surface of the reading roller 12b is within the allowable depth of focus.

In addition, FIG. 2 (C1 shows a control block diagram of the FAX machine input of the embodiment, and in the figure, the detection unit 15a is transferred from the state where the image sensor 50 is reading the image data of the grooves 14a to 14c. A change in image data when the leading edge of the document 1a is read is detected and notified to the leading edge reading control unit 16.

The leading edge reading control unit 16 instructs the detecting unit 15a to detect the leading edge of each document 1a, and also instructs the feeding mechanism control unit 4a to stop feeding the reading roller 12b based on the detection result of the detecting unit 15a.

The main control section 2a controls each section to read the original 1a.

In addition to performing transmission, reception, and recording, the reading section 5b sends the image data of the # grooves 14a to 14c of the reading roller 12b and the leading edge of the document 1a read by the image sensor 50 to the detection section 15a, and the detection section 15a reads the image data. After detecting a change, it has a switching control function to send the image data of the original 1a to the image buffer 6.

Since it has such a configuration and function, the operation will be explained with reference to the flowchart in FIG. 3.

■Before the original 1a is inserted, the detection unit 15a is activated by a command from the leading edge reading control unit 16, and the image sensor 50 detects the grooves 14a to 14a of the driving reading roller 12b.
14c image data is being read.

Figure 2 (circle bl shows the steady waveforms of the white level and black level of this image data.The black level is
This is image data from a to 14C.

■When the leading edge of the document 1a inserted from the surface of the guide 13a comes directly under the image sensor 50 and is read,
Since the tip is usually a white background, the waveform is a continuous white level. The detection unit 15a detects this change and notifies the tip reading control unit 167.

(2) The feeding mechanism control section 4a stops feeding the reading roller 12b in response to a command from the leading edge reading control section 16. In this case, as shown in FIG. 2(a), the feed stop position is stopped at a point advanced by a slight distance L (for example, 2 dragons) from the center line of the image sensor 50 and the reading roller 12b, and the system waits at this position. .

(2) When a reading command is sent from the main control section 2a to the reading section 5b and the feed mechanism control section 4a, the reading roller 12b is driven and the original 1a is sent out and read by the image sensor 50.

The reading rollers of different embodiments (1) and (2) are shown in Fig. 4 (
Shown in a) and (bl).

Fig. 4 (al is a screw-shaped groove 14d with different widths at a predetermined depth)
.

The reading roller 12c is provided with a roller 14e.

Further, FIG. 4(b) shows a reading roller 12d provided with black band-like patterns 14f to 14h of different widths along the outer periphery. It goes without saying that the black band-like pattern may be provided on the outer circumferential surface in a winding pattern as shown in FIG. 4 (al).

In this way, by providing a pattern that can be read in black on the outer periphery of the white reading roller, the leading edge of the document 1a can be detected by a change in the waveform read by the image sensor 50. The sensor that detects the tip can be removed, and the number of parts can be reduced, making the device smaller and lighter, and improving costs.

〔Effect of the invention〕

As explained above, according to the present invention, the leading edge of the document can be detected by providing a pattern of arbitrary width that can be read as black on the outer periphery of the white roller, so the mechanism can be omitted with a small number of parts remaining. This has the effect of reducing size, weight, and cost.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the principle of the present invention; Fig. 2 is a block diagram showing an embodiment of the invention; Fig. 3 is a flowchart of the embodiment; Fig. 4 is a plan view showing a roller of a different embodiment; The figure is a block diagram of a conventional FAX machine, and FIG. 6 is a side view of the reading section of the conventional example. In the figure, 1 and la are originals, 5 are reading means, 5a and 5b
12 is a reading unit, 12 is a roller, 12a to 12d are reading rollers, 14 is a pattern, 14a to 14e are grooves, 14''
14h is a strip pattern, 15 is a detection means, 15a is a detection section, and 16 is a tip reading control section. 7.C. <0) Reading Cola's Taira Ml (San Tomometo, Mimi 7g door 6su, Ikan ino, D(G) Tsukuda" box ρ busako tsuku n incomplete e moon fruit' direction 4 dali and Gabi T Fusunosu No. 23 (
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Claims (4)

[Claims] (1) A roller (12) with a white surface, and a roller (12) provided opposite to the roller (12).
) is in close contact with the original (1) being transported by the original (1).
), at least one reading device is provided inside the outer periphery of the roller (12) at a position corresponding to the width of the original (1), and the reading means (5) reads an image of the original. (1
) and a pattern (14) of arbitrary width that can be distinguished by reading by the reading means (5), and the image data of the pattern (14) being read by the reading means (5). ) by transferring the manuscript (1)
and a detection means (15) for detecting a change in the image data when the leading end of the roller (12) is read by the reading means (5), based on the detection by the detection means (15).
A reading device characterized in that it temporarily stops feeding the document (1) and waits for a reading command to read the document (1). (2) The reading device according to claim 1, wherein the pattern (14) is a ring-shaped groove with a predetermined depth. (3) The pattern (14) is a screw-shaped groove with a predetermined depth.
The reading device described in Section. (4) The reading device according to claim 1, wherein the pattern (14) is colored black.