JPS58131861A - Optical original scanning system - Google Patents

Abstract

PURPOSE:To eliminate the need for manual setting, by detecting the time point of start and end of original reading in response to the size of original automatically, and shifting a photoelectric converter to a prescribed position instantaneously, in a facsimile device. CONSTITUTION:In case of a copy original printing machine, an original 2 and a manuscript 4 are loaded respectively to an original device section 3 and a manuscript loading section 5 of a rotary drum 1 by matching the center of the width of them to the center of each loading section and a start switch 24, and an original size selection switch 25 or 26 are selected. The shifting time of a scanning stand 8 in response to the original size is set to an original size set timer. When a position detecting switch 16 is set on, a motor 9 is started with a high speed drive output HR, the stand 8 is fed left and stopped at the left end. Then, a drive motor 6 of the drum 1 is started with an output SC to a constant speed, then the stand 8 is rapidly traversed to the right direction, a black line B is detected at the photoelectric converter 12 at each one revolution of the drum, the original is discriminated, a recording stylus 21 is brought into contact with the original for a specified reading and punching.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical W7L document scanning system in which the A-side of an original is optically scanned by a photoelectric conversion device, such as in a facsimile machine or a mimeograph machine.

In this ultra-optical document scanning method, there are several document sizes to be read, such as A4 type and B4 type, and it is necessary to adjust the start and end points of document reading according to these document sizes, and also to read the document midway. In order to prevent this, it is necessary to check whether the photoelectric conversion device is in a predetermined setting position.Especially in mimeograph paper making machines, a recording device synchronized with the photoelectric conversion device has to check whether the photoelectric conversion device is at a predetermined setting position or not. Since the original recording paper is destroyed, it is necessary to strictly control the starting and ending positions of document reading.

In conventional scanning methods, the document reading start and end positions are set mechanically by the operator or according to the document size, but this is time-consuming and does not allow for quick document scanning, and photoelectric conversion is difficult. If the device is not at the predetermined set position, it is necessary to return it to the predetermined set position and then start reading the document, which has the disadvantage of being troublesome.

The present invention automatically detects the start and end points of document reading according to the document size, thereby omitting these setting operations, and even if the 9m conversion device is not at the predetermined position, it is automatically moved to the predetermined position instantly. It is an object of the present invention to provide a new optical document scanning method that can overcome the drawbacks of the conventional apparatus by moving the document.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to a mimeograph paper plate-making machine will be described below with reference to the drawings.

In the figure, (1) has a base paper mounting section (3) for mounting the discharge recording base paper (2) on the left half, and a document mounting section (5) for mounting the original (4) on the right half. A rotating drum,
It is rotated in one direction by a motor (6) at a rotational speed of, for example, 600 LPM. The document mounting section (5) is equipped with a mounting paper (Pl) wrapped around the rotating drum (1), on which a black line (B) of 10 m to 50 m width is drawn extending between both ends in the axial direction. Break the structure in which the transparent vinyl sheet + Tl is peeled off and wrapped around 11, and attach the original 5 (2) by sandwiching it between the mount (P) and the sheet (T). Note that (7) is the original paper (2).
and a paper presser for holding down the original (4).

(8) is a scanning table that moves along the rotating drum (1), and is screwed to a screw shaft QOK rotated by a Varne motor (9), for example, to form a base paper mounting section (3) and a document mounting section (5). ) is movable in the left-right direction (sub-scanning direction), and its length in the axial direction of the drum is equal to the axial direction of the original paper holder 5 (3) and the original holder yf 1 part (5). It is selected to be much longer than its length, and a discharge recording device (2) and a photoelectric conversion device (6) are arranged at the left end and right end of the drum so as to face the drum (1).

In this case, the electric discharge, recording device gILC11) and light converting device @ place the base paper (2) and the original (4) of the same size on the rotating drum (1), and place their left and right centers at the respective mounting portions +31.
(It is disposed so as to face the left or right end of the base paper or manuscript when it is mounted so as to be aligned with the center of the paper 51.

q4 is turned on when the recording device αυ and the photoelectric conversion device (b) reach the plate-making start position facing the left ends of the mounting sections (3) and (5), contacting the left south surface of the scanning table (8) and turning on. On the other hand, the normally closed switch Qω contacts the right end surface of the scanning table (8) when the recording device Q1) and the photoelectric conversion device o2 reach the plate-making start position opposite the right end of the mounting m (31 and (5), respectively). (G) is the normally closed switch that is turned on when the switch is turned on.
) is a position detection switch that faces approximately the middle position of the scanning table (8) and contacts the back surface of the scanning table (8).
) is in contact with the scanning table (8) and the recording device α is on.
It is determined that the position of υ and the photoelectric conversion device (2) is in the left half of the sub-scanning area, and that mVc is on the right side of the sub-scanning area in the off state where it is not in contact with the scanning table (8). be recognized. Note that the position detection switch (7) is located at the document loading section (5).
) may be arranged at a position facing the center in the sub-scanning direction.

(g) is a tf: an inverting amplifier that inverts and amplifies the output of the converter αη, a modulation circuit that modulates the oscillation frequency according to the output of the amplifier (to), and an output amplifier that amplifies the modulated output. Then, the output of the output amplifier is output to the discharge recording device (11
), and the discharge recording base paper (2) is perforated by the discharge recording needle C21) corresponding to the black part of the original image. The discharge recording device α1) is equipped with a recording needle drive solenoid (not shown) for bringing the discharge recording needle υ into contact with or away from the rotating drum (1), and this solenoid is connected to a control circuit to be described later. (23) Control output (8011
It is activated by C.

Kan is a control circuit configured with a microprocessor, and the black and white squares are supplied with the switch signals of the wire and the output of the inverting amplifier (g) to each of the switches α4 (a), the start switch (2), and the original size selection switch. The discrimination output (8X) of the circuit wire is supplied, and based on these, the rotational drive output (sO) of the drum drive motor (6) and the scanning table drive motor (sO) are determined according to the flowchart shown in FIG. 2, as described later.
9) High-speed forward rotation drive output (HP), high-speed reverse rotation drive output (
HR), normal forward rotation drive output (NFI), normal reverse rotation drive output (NR), and drive output (SD) for controlling the contact of the recording needle φ of the recording device αυ with the surface of the original paper are obtained in the required order.

The operation of the system of the present invention using the above S configuration will be described next.

First, place the base paper (2) and document (4) on the base paper loading section 5 (3) and document loading section (5) VC of the rotating drum (1), respectively, so that the centers of their widths are aligned with the respective loading sections (3) and (5). ), then press the start switch (c) fully and select either the A4 or B4 document size selection switch (c) or (e) depending on the document size. , the transfer time of the scanning table (8) according to the document size, that is, the scanning table (8), the recording device αη and the optical TF exchange device placed on it in a steady feeding state (21 and the original (4)) The time required to move from one end to the other (for example, 285 seconds for A4 size, 360 seconds for B4 size) is selectively set in the i-document size setting timer (step 101).

Next, it is determined whether the position detection switch (g) is in the on state or not (step 102), and if it is on, the Hi check table (8)
While it is determined that the scanning table drive motor (9) is in the left position, an output ma+ is obtained which drives the scanning table drive motor (9) in high-speed reverse rotation, and this is supplied to the motor drive circuit e1) via the OR circuit -. ) is activated and the scanning table (8) is fast-forwarded to the left (step 103).

Next, it is determined whether the left end detection switch α4 is on,
If it is off, return to step 106 and scan the scanning table (8).
continues fast forwarding (step 104).

Then, the scanning table (8) reaches the left end and the detection switch (14) is turned on.
1 is turned on, the movement of the scanning table (8) is stopped (step 105) since the motor high speed reversal output (HR) cannot be obtained. After that, the drive motor (6) of the rotating drum (1)
) is driven by the rotational drive output (SO) supplied to the motor drive circuit (a), and the rotating drum (1) is driven to rotate, and the time C (for example, 5 seconds) required for this to reach normal rotation is determined by a timer. is set ( , xtets i106). Next, it is determined whether the timer has timed up or not (step 1071). If the time has expired, a high-speed stop drive output (HF) of the scanning table drive motor (9) is obtained and the scanning table (9) is fast-forwarded to the right in step C. 10
8). Next, every rotation of the drum, the black edge (Bl) is detected by the conversion device 02, and it is determined whether or not a discrimination detection output (SX) is obtained from the black-and-white discrimination circuit, and scanning is performed while the discrimination output is obtained. Fast forward the platform (8) to the right (step 1
09). When the photoelectric conversion device @ on the scanning table (8) reaches the document surface and the discrimination output (SXI) cannot be obtained from the black-and-white discrimination circuit (E), the document size setting timer is set (step 110), and the discharge occurs almost simultaneously. Recording needle drive output (SDI
Is the recording needle obtained? The reverse is brought into contact with the original paper (2) (step 111), and then a high-speed stop-rotation drive output (instead of HFI, a steady normal rotation drive output (NF)) of the scanning table drive motor (9) is obtained, and the scanning table (8) is constantly fed rightward (step 112).

Former during this time! The original reading output read from the original surface by the converter wt, (2) is supplied to the discharge recording device αη via the amplifier (to), the modulator a, and the amplifier gQ, and the original is read by the discharge recording needle (b). The black part of 4) is perforated by the discharge recording device (2).

Then, the scanning table (8) is moved to the right and the photoelectric conversion device (
6) When the right edge of the original (2) is reached and the original size setting timer times up, this is determined in step 113 and the process moves to step 114, where the recording needle drive output (8D)
is stopped, the discharge recording needle (2) is separated from the surface of the base paper (2), and the perforation plate making is completed.

Next, in step 115, the high-speed stopping drive output (■゛) of the scanning table motor (9) is obtained again, and the scanning table (8) is fast-forwarded in the right direction, and then, in step 116, the scanning table right end detection switch 4 is turned on. If it is off, the scanning table (8) continues to be fast-forwarded to the right, and the switch (to) is checked.
When it turns on, the process moves to step 117, and the scanning table (8)
When the rotating drum (1) stops, the t-sources of each part are cut off, and the entire device stops.

In this state, the base paper (2) and the original (4) are transferred to the rotating drum (1).
), load a new base paper (2) and original (4) into the specified positions of the loading sections (3) and (5), and press the start switch (c) again. The scanning table position detection switch (
) is off, so step 102 to step 10
3' to quickly move the scanning table (8) to the right (if the drive output (HFI) is obtained, the position detection switch Of9 is on, so step 104' is immediately changed to step 1.
05', the drive output (HFI) cannot be obtained and the scanning table (8) maintains a stopped state. From then on, the direction of movement of the scanning table (8) is reversed, that is, the high-speed forward rotation drive output of the scanning table drive motor (9) Steps 106' to 117', which are the same as steps 106 to 117 above, are performed, except that (HF) is replaced with the high speed reverse rotation output (HR), and the steady stop rotation drive output (NFI is replaced with the steady reverse rotation drive output (NRIK). Thereafter, the original paper (2) is made into a plate while being fed to the left on the scanning table (8).

The above operation has been explained for the case where the scanning table (8) is moved in the opposite direction for each plate-making process, but as shown by the chain line in FIG. 2, the scanning table (8) is moved to the left after step 114. By providing step 121 for fast forwarding 9, step 122 for determining whether the detection angle α is on, step 123 for stopping the scanning table (8), and step 124 for stopping the entire apparatus, the scanning table (8) is returned to the left end of the rear seat for base paper plate making, and plate making can always be started from 9JI on the left.

Also, steps 106, 106', 110, 110'
In this case, instead of setting the time of the timer, the erasing synchronization signal forming circuit @ represents the paper presser (7) of the rotating drum (1) or the recording device αυ and 9, which faces the converting device (2). The synchronizing signal (8Y) for each rotation of the drum may be counted in steps 107, 107', 113, and 113' and compared with a set value. For example, in steps 106 and 106', the drum rotation knobs 60
In steps 110 and 110', A4:28
50. #Rus, 84:00 3600 pulse j U Ic setting.

Furthermore, in step 107, when the rear scanning table (8) is fast-forwarded to the document edge, instead of detecting the black scratch g, a timer is used to set the time to reach the document sheet in advance, for example, A4:3.5.
It is also possible to set 84:01 seconds.

As described above, according to the present invention, even if the position of the converting device with respect to the document is not specified, that is, it is not at the predetermined reading start position, the original 1 placed on the scanning table is automatically converted. and quickly move it to the @feeding start position, then fast-forward in the nearby document edge case, start i-document reading scan in the steady feed state after detecting the document edge, and re-fast-forward 1- after the document reading scan is completed. Since I am trying to stop it at the end of the scanning area,
By simply specifying the original size, the original R output corresponding to the original size is automatically obtained, and this original reading output can be used to operate the original paper plate making machine and other receiving devices to reproduce the original image. There is no hassle in setting the size, and it is also light! It is often necessary to check the location of the conversion device,
It has an excellent feature that allows reading scanning to be performed easily and quickly.

In the above description, the present invention is applied to a mimeograph paper making machine, but it can also be applied to a document @taking device such as a facsimile machine.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of a case where the present invention is applied to a mimeograph paper plate making machine, and FIG. 2 is a flow chart showing the operation of a control circuit. (1)...Rotating drum, (21...Mimeograph paper, (4
)...original, CB)...black line, ψ)...mounting paper, (η...transparent sheet, (8)...scanning table,
(b)...9 is a conversion device, a<Q5 o←...position detection switch, (c)...control circuit. Applicant: Gakushu Kenkyusha Co., Ltd. ;4;-L':L-

Claims (1)

[Claims] +1) In an optical document scanning method in which the surface of a document is optically scanned by a photoelectric conversion device, the entire position of the photoelectric conversion device is detected before the start of document reading scanning, and the light is transmitted to all of the locations closest to the conversion device. It fast-forwards to the edge of the scan area, then fast-forwards in the reverse direction to the nearby edge of the document, and after detecting the southern part of the document, performs steady feed to start document reading scanning, and after completing the document reading scan, fast-forwards in the reverse direction again. The optical original scanning method is characterized by stopping at the edge of the scanning area. (2) The position of the photoelectric conversion device is located at the end of the scanning table, in which all the detection switches are disposed at approximately midpoints of the moving distance of the photoelectric conversion device, and the length of the original converting device is less than or equal to the above moving distance. Place it nearby and turn on the above detection switch Φ
An optical document scanning system according to claim 1, wherein detection is performed by off-output. (3) Manuscript! The detection sound of the i@ section is achieved by arranging a black line of a certain width in the sub-scanning direction on the document loading section, which is partially covered by the document, and detecting the unnecessary portion that is not covered by the document with the black edge. Claim No. 1
Item or second,! Optical manuscript scanning method described in J.J.