JPS6143068A - reading device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention relates to a reading device in which a reading head including a plurality of reading sections moves in one direction relative to the document surface to read an image on the document surface. It is related to the device.

[Prior Art] - Conventionally, in this type of reading device, a reading head equipped with a plurality of reading sections moves in one direction relative to the document surface to read the document surface, and the read data is is stored in the storage device.

The applicant of this application filed a patent application for an example of this type of reading device in 1983-
This is proposed in No. 16011'2.

In the reading device, a plurality of reading sections are arranged on the surface of the reading head facing the paper, and are arranged at an angle with respect to a direction perpendicular to the one direction, and the relative position of the reading sections with respect to the document surface is determined. A detecting means and a means for sequentially operating the reading section based on the detecting means when the reading section approaches a position for reading an image on the document surface are provided. As a result, it is possible to read an image on the document surface while the reading head moves on the document surface without stopping, and it is possible to provide a reading device that can increase the reading speed and reduce power consumption.

[Problems to be Solved by the Invention] In the above-described conventional reading device, when the plurality of reading sections approach the image reading position on the document surface and sequentially read the images, the reading sections are aligned in the one direction. After reading the image at one row of reading positions provided, the next row of reading positions was reached and reading started.

Therefore, the reading speed of the reading head was slow, and it took time to read the image on the document surface.

[Object of the Invention] The present invention was made in order to eliminate the above-mentioned drawbacks of the prior art, and an object of the present invention is to provide a high-performance reading device that can further increase the reading speed.

[Means and effects for solving the problem] In order to achieve this object, in the reading apparatus of the present invention, the reading head is arranged so that the plural reading parts have a plurality of reading positions at the same time in the direction of movement of the reading head. A storage device arranged above and storing data read by the reading head is divided into the plurality of reading positions, and data read at the plurality of reading positions is stored in each of the divided predetermined storage devices. They are input sequentially. Thereby, a plurality of reading sections can simultaneously read a plurality of reading positions in the moving direction of the reading head.

[Example] Hereinafter, an example embodying the present invention is shown in Figs. 1 to 4.
This will be explained according to the diagram. In FIG. 1, a driver shaft 1 is supported at both ends by a frame (not shown) of a reading device.
1 is disposed parallel to a support drum 13 that controls the feeding of the original 12, and a DC motor 14 is connected to one end of the support drum 13 for driving purposes, and a spiral cam groove 1 is provided on the outer peripheral surface of the support drum 13.
5 is engraved. A holder 16 that moves a reading head 19 (described later) relative to the document surface 12 in one direction is attached to the support drum 1 at the lower front side of the driver shaft 11.
It is movably supported by a guide shaft 17 disposed in parallel with 3, and a locking piece 18 formed on the rear surface is fitted and supported in the spiral cam groove 15. When the driver shaft 11 is rotated by the DC motor 14, the holder 16 is connected to the spiral cam groove 15 and the locking piece 1.
8 reciprocates in the left-right direction along the guide shaft 17.

The reading head 19 is attached to the front surface of the holder 16, with its front surface facing the document surface on the support drum 13.

Therefore, the reading head 19 sequentially reads images recorded on the original 12 in the horizontal direction as the holder 16 moves.

As shown in FIG. 2, a plurality of reading sections (R1 to R8) are provided on the surface of the reading head 19 facing the document, and are inclined in a straight line with respect to a direction perpendicular to the one direction. They are lined up. In this embodiment, the reading section (
R1 to R8) have a distance D1 in the vertical direction and a distance D2 (=D1/2) in the horizontal direction. Its reading section (
R1 to R8) are arranged so as to simultaneously have a plurality of reading positions (al, bl, c'1, etc.) in the one direction.

FIG. 3 shows virtual reading positions on the document surface 12 placed opposite the reading head 19, and the arrangement of the reading positions has an interval D1 in both the vertical and horizontal directions. In the vertical direction, al, a2. ..., a8
etc. reading positions are set, and in the horizontal direction (the one direction), a 1. b1. ..., (11, etc.) reading positions are set.As a result, when the reading head 19 faces the document surface 12, its reading parts (R1 to R8) simultaneously face four reading positions in the one direction. The reading positions (a1, b) of the reading parts (R1 to R8)
1, c1, etc.) every other time.

As an example, the reading sections R1, R3, R5, R7 are at the reading position d1. c3. b5. When facing a7, the reading sections R2, R4, Re, and R8 do not face the reading position. Also, the reading portion R2°R4, R6, and R8 are at the reading position d2. When facing C4, b6, and a8, respectively, reading portions R1°R3, R5, and R7 do not face the reading position (see FIG. 4).

The DC motor 14 that drives the driver shaft 11 is
Microcomputer 20 via motor drive circuit 21
The reading head 19 is driven at a constant rotational speed based on a drive control signal output from the reading head 19, and the reading head 19 is reciprocated in the left-right direction at a constant speed. Therefore, read head 1
One always moves at the same speed. A rotary plate 22 fixed to the end of the driver shaft 11 is configured to rotate together with the driver shaft 11, and a plurality of slits 23 are concentrically formed on the periphery at predetermined equal intervals. It is set up.

A light emitting element 24 is disposed on one side of the rotary plate 22 so as to face the slit 23, and is operated to emit light by a drive signal from the microcomputer 20. On the other hand, a light receiving element 25 is disposed on the other side of the rotary plate 22 to face the light emitting element 24, and detects passage of the slit 23 passing in front of the light receiving element 25 by receiving light from the light emitting element 24. However, the detection signal is output to the microcomputer 20.

Each of the slits 23 is a slit for detecting the timing at which each of the reading sections R1 to R8 passes through a corresponding reading point in each column, and the interval between the slits 23 is determined by the rotation speed of the slit and the head. It is determined based on the relationship with the moving speed of No. 19. That is, the interval between the slits 23 in this embodiment is such that when the slits 23 rotate and pass between the pixel elements 25 and 24, four of the reading units R1 to R8 of the head 19 always read their corresponding reading points. It is set to pass.

The microcomputer 20 is connected to the motor drive circuit 2.
In addition to outputting a drive control signal to the light-emitting element 1 and a drive signal to the light-emitting element 24, the relative position of the reading head 19 is detected based on the detection signal of the light-receiving element 25, and the current reading IR is detected.
1 to R8 are passing through the opposing reading positions (a1, b1, c1, etc.), and sequentially calculate the reading positions [(a
l, bl.

C1, etc.) is operated, and the image information at that reading position is sequentially read.

A storage device 26 that stores image data read by the reading head 19 is connected to the microcomputer 20 . The storage device 26 is divided into the number of reading positions.

In this embodiment, the storage device 26 is divided into four parts, each of which is a storage device 26a, 26b, and 26c.

It is called 26d. And the microcomputer 20
is the plurality of reading positions (al, bl.

01, etc.) are stored in the divided predetermined storage devices 26a, 26b, 26c.

26d, respectively. At this time, reading section R1,
The data read by R2 is input to the storage device 26a, and the data read by reading units R3 and R4 is input to the storage device 26a.
The data input to tl and read by the reading sections R5 and R6 is input to the storage device 26c, and the data read by the reading sections R7 and R8 is input to the storage device 26d.

Next, the operation of the reading device configured as described above will be explained.

Now, the document 12 on which the image has been recorded is placed on the support drum 1.
3, and the reading head 19 starts moving from the left side to the right side at a constant speed over the document surface. In this state, the microcomputer 20 calculates the relative position of the head 19 with respect to the document based on the detection signal from the light receiving element 25 that detects the slit 23 of the rotary plate 22.

Then, when the reading sections (R1 to R8) reach the positions (a1, b1, c1, etc.) where images on the document surface 12 are to be read, the reading sections (R1 to R8) sequentially perform a reading operation, respectively. The time when the reading section R1 approaches the reading position d1 is defined as the reference position of the reading head 19. FIG. 4 shows the movement of each reading section (R1 to R8) as the reading head 19 moves.
indicates which reading position (a1, b1, c1, etc.) is opposed.

When the reading head 19 moves on the document surface 12 and reaches the reference position, the first reading section R1 reads the reading position d1, the third reading section R3 reads the reading position C3, and the fifth reading section R5 reads the reading position C3. Based on the detection signal of the light receiving element 25, the microcomputer 20 detects that the seventh reading section R7 is passing the reading position a7 at the position b5.

The microcomputer 20 immediately reads the first reading section R1, the third reading section R3, the fifth reading section R5, and the seventh reading section R.
3. Output the operation signal to 7 and read the reading position d1°a.
b5. a Perform the reading at 7. So L/T
, each reading position d1. c3. b5. When the reading at the reading position a7 is completed, the microcomputer 20 sends the reading data at the reading position d1 to the storage device 26a, and similarly, the reading data at the reading position c3. b5. a
7 is stored in the storage devices 26b and 26.
c and 26d, respectively.

When the microcomputer 20 detects based on the detection signal that the reading head 19 moves to the right by a distance D/2 from the reference position and the head 19 passes the next reading position, the second reading section R2 , fourth reading section R4,
The sixth reading section R6° outputs an operation signal to the eighth reading section R8 and sets the reading position d2. c4. b6. a
Perform the reading at step 8. Then, when the reading is completed, the microcomputer 20 moves to the reading position d2. in the same manner as described above. c4. b6.
The read data in a8 is stored in the storage device 26a,
26b, 26c.

26d, respectively.

Further, when the microcomputer 20 detects based on the detection No. 48 that the reading head 19 moves to the right by a distance from the reference position and the head 19 passes the next reading position, the first reading is performed. An operation signal is output to the section R1, the third reading section R3, the fifth reading section R5, and the seventh reading section R7, and each reading position e1. d3. c.
5. b Perform the reading at 7. When the reading is completed, the microcomputer 20
is the reading position e1. d3. c5. The read data in b7 are stored in storage devices 26a, 26b, and 26, respectively.
c.

26d.

When the above reading operation is performed, the storage device 2
6a, the positions d1.6a read by the first and second reading units R1°R2. d2. el,, e2. ... are input in that order. Further, the storage device 26b stores the positions c3. and 3.c.d. that have been read by the third and fourth reading sections R3 and R4. c 4゜d 3. d4.・
... are input in that order.

Furthermore, the storage device 26c includes fifth and sixth reading units R5.
, R6 read the position b5. b6. c5. c6.
... are input in that order. Furthermore, the storage device 26d includes seventh and eighth reading units R.
7, position a7 read by R8. a8. b7. b8. −
The read data at - and is input in that order.

In the manner described above, the reading head 19 reads one horizontal row of images on the document surface. After that, when the support drum 13 feeds the document 12 one stage, the head 19 moves to the driver shaft 11.
The running direction is changed by the spiral cam groove 15, and the running direction is changed to the left. Even when the head 19 moves to the left, each reading section (R1 to R8) sequentially performs a reading operation each time it reaches each reading position based on the detection signal, which is the same as the reading operation when moving to the right. The same is true. However, in the seventh and eighth reading sections R7 and R8, the eighth reading section R8 reads the data before the seventh reading section R7, and the microcomputer 20 stores the read data in the storage device 26d. Since the data are transmitted in that order, the data arrangement is opposite to the data arrangement read during the rightward movement. Also, that is the fifth point. Regarding the sixth reading section R5, R6, and the third. Regarding the fourth reading sections R3 and R4, the first. Second reading section R1, R2
The same applies to However, if the microcomputer 20 stores a signal informing the change in the storage device [26] every time the read line changes, the microcomputer 20 can output data that has been input to the storage device 26 from the storage device 26 without any problem. .

As described above, in this embodiment, the plurality of reading units (R1 to R8) of the reading head 19 simultaneously operate at four reading positions (al, bl, C1) in the moving direction of the reading head.
etc.), and the storage device 26 for storing data read by the reading head is divided into four parts. Then, at the four reading positions, the read data is sequentially input into the divided predetermined storage devices 26a, 26b, 26c, and 26d, respectively. Thereby, the reading head 19 can read at four locations, increasing the reading speed.

It should be noted that the plurality of reading units having a plurality of reading positions at the same time in the moving direction of the reading head do not need to be arranged in a straight line at an angle as shown in FIG. A trilinear inclined arrangement as shown in FIG. 5 may also be used.

[Effects] As described above, in the reading device of the present invention, the plurality of reading sections are arranged on the reading head so as to simultaneously have a plurality of reading positions in the movement direction of the reading head, and the storage device for storing the data is divided into the number of the plurality of reading positions;
The data read at the plurality of reading positions are sequentially input to the divided predetermined storage devices. As a result, a high-performance reading device with increased reading speed can be provided.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of an embodiment embodying the present invention, Fig. 2 is a front view of the reading head provided in this embodiment, and Fig. 3 shows a virtual reading position on the document surface. FIG. 4 is a table showing the reading operation of the reading section of the reading head, and FIG. 5 is a diagram corresponding to FIG. 2 of another embodiment. In the figure, 12 is a document surface, 19 is a reading head, 20 is a microcomputer, 26 is a storage device, R1 to R8 are reading units, and a1, b1, c1, --- are reading positions.

Claims (1)

[Claims] 1. Means (11, 14) for moving the reading head (19) relative to the original surface (12) in one direction, and a means (11, 14) provided on the surface of the reading head opposite to the original surface. a plurality of reading sections (R1 to R8) arranged in a row and inclined with respect to a direction perpendicular to the one direction; and means (22 to 25) for detecting the relative position of the reading sections to the document surface; Based on the detection means, the reading section (R1
~R8), and a storage device (26) for storing the read data, wherein the plurality of reading units (R1 to R8) operate simultaneously in the one direction. reading positions (a1, b1, c1, etc.), and the storage device (26)
is divided into the plurality of reading positions, and the data read at the plurality of reading positions (a1, b1, c1, etc.) is sequentially input into the divided predetermined storage devices (26a to 26d), respectively. A reading device characterized in that: 2. The reading device according to claim 1, wherein the plurality of reading sections are arranged obliquely in a straight line with respect to a direction orthogonal to the one direction.