JPS61228769A - Picture reader - Google Patents

Abstract

PURPOSE:To set the segmenting position of an original picture with recognizing visually an original by providing a segmenting position indicating means which indicates the segmentation range of the picture on the original picture at a part where the original is placed. CONSTITUTION:A marker M1 is provided at the downstream side position where can be recognized visually from the outside of a guide member which guides the lower face of the original. The length of the marker is sized to expose the end part even in the case of setting an original P with maximum size. Also it is a contacting member sliding on a resistance body 31. On the upper surface of said contracting member 32, a marker M2 is provided. As for the setting of the segmenting position of the original picture, the starting position of the segmentation is adjusted by fitting the segmenting start requested position of the original picture with the marker M1 using a carrier button 26 and the finishing position of the segmentation is, after the above setting, adjusted by moving the contacting member 32 to the segmenting finish requested position of the original picture and fitting it with the marker M2.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an image reading device that feeds an original to an image sensor and reads an image of the original there.

(Prior Art) There are few methods of cutting out an original image (a method of reading a part of the original image) in an image reading apparatus that uses an original moving method. As an example of this conventional cropping method, there is a method in which a position is designated from the host side (host computer) and an image is cropped. In this case, it is necessary to determine the cutting position on the original image in advance, specify this from the host side, and read it.

(Problems to be Solved by the Invention) When using the above conventional method, it is not possible to set the cropping position while visually checking the document, and data indicating the cropping position must be input to the host side. . Therefore, it takes a considerable amount of time to cut out the original image.

The present invention has been made in view of the point -1-, and an object of the present invention is to provide an image reading device that can easily cut out a document image.

(Means for Solving All Problems) The present invention solves the above problems by specifying an image cropping range on the document image in an image reading device that feeds the document to an image sensor and reads the document image there. The present invention is characterized in that a cutout position specifying means is provided in a portion where one document is placed.

(Function) Image reading 1i of the present invention! ili! With this, you can set the cutting position of the original image while visually checking the original. Therefore, the cutting operation is easy.

(Example) Embodiments of the present invention will be described in detail below with reference to the drawings.

1 to 5 are main part configuration diagrams showing one embodiment of the present invention. In these figures, reference numeral 1 denotes a contact-type one-dimensional image sensor (line sensor) that reads an image of a document by bringing the document into sliding contact with the reading surface 2 on the lower surface. The outer plates 3.4 forming the reading surface 2 of the image sensor 1 face each other with a constant gap 5 in the center. Inside this gap 5, a circuit section (not shown) for operating the reading section 6 of the image sensor 1 and the image sensor 1 is arranged. The reading section 6 includes, for example, an LFD array that irradiates light onto the document on the reading surface 2 through the gap 5, a SELFOC lens array that collects reflected light from the document surface through the gap, and a SELFOC lens array. It is composed of a COD and the like that receives focused light from a lens array. Note that the array direction is a direction perpendicular to the paper surface of FIG.

The outer plate 4 of the image sensor 1 is extended to the right in FIG. 3, and the extended portion 4a is a part of the document guide (upper guide).
is formed. Guide members 7 and 8 guide the lower surface of the document and form a lower guide. Guide member 7
1 is a guide member facing the reading surface 2 of the image sensor 1, and a portion on the document feeding side is rotatably supported by a bin 9 (fixed to the main body of the apparatus, not shown). This guide member 7 is always urged toward the reading surface 2 of the image sensor 1 by a spring (not shown). Further, the guide member 8 is a guide member that is connected to the guide member 7 and is inclined toward the upper right in FIG. 3, and a marker M1 is provided at a downstream position that is visible from the outside (see FIG. 1). . The length of this marker M1 is selected so that even when the maximum size document P is set, its edge (upper part in FIG. 1) is exposed.

10 is a paper feeding roller provided on the feeding path formed by the guide member 8; 11 is a driven roller disposed so as to press against the paper feeding roller 14.0; 12 is a roller whose outer peripheral surface is on the paper discharge side of the image sensor 1; This is a paper discharge roller that is in sliding contact with the outer plate 3 of the paper. The peripheral speed (moving speed of the outer circumferential surface) of the paper discharge roller 12 is selected to be the same as or slightly higher than the peripheral speed of the paper feed roller 10 so that the document does not bend during reading. To specifically achieve this, when the outer diameters of both rollers are made equal, the rotational speed of the paper ejection roller 9 is set to be the same as or slightly higher than the rotational speed of the paper feed roller 7, and the rotational speed of both rollers is increased. If they are the same, the outer diameter of the paper ejection roller 12 may be made equal to or slightly larger than the diameter of the paper feed roller 10. Therefore,
In the embodiment shown here, both rollers are driven at the same rotational speed, and the outer diameter of the paper discharge roller 12 is made slightly larger than the outer diameter of the paper feed roller 10.

13 is a motor for feeding the document, and its output shaft 14
The gear 15 fixed to the roller shaft 1 of the paper feed roller 10
It is externally engaged with (meshing with) the gear 17 fixed to the gear 6. 18
is a timing belt for driving the paper ejection roller 12 at the same rotational speed as the paper feed roller 10; It is wound between a toothed pulley 21 fixed to a shaft 20. The roller shaft 22 of the driven roller 11 is supported so as to be rotatable and movable in the vertical direction in FIG. 3.

23 is a power source that generates and supplies a predetermined DC or AC voltage from a commercial power supply voltage; 24 is a circuit board for controlling various processes of the reading device, driving a motor, etc.; The power supply 23 and the circuit board 24 are disposed below the document feeding path to the image sensor 1 for effective use of space.

In addition, in this embodiment, in order to control the sequence of image reading, the document is detected at a predetermined position using an optical sensor or a microswitch consisting of a light emitting diode and a photodiode or a phototransistor. It is being said. That is, the first document detection sensor S1 is located in front of the paper feed roller 10 and detects insertion of a document into the paper feed roller 10, and the first document detection sensor S1 is located between the paper feed roller 10 and the image sensor 1. a second document detection sensor S2 that detects the document fed by the image sensor 1;
A third document detection sensor S3 is provided at a subsequent stage to detect the discharged document. In addition, in order to execute reading, an operation panel 25 is provided on the top surface of the device, and there is a transport button 26 for rotating the motor 13 to transport the document, and a transport button 26 for instructing to start reading. A start button 27 and the like are provided. In this embodiment, the document is conveyed only when the conveyance button 26 is pressed (turned on), and the conveyance relationship is set lower than the document feeding speed when reading the document image. The above transport button 26. The outputs of the start button 27 and the first to third document detection sensors S1 to S3 are input to the control unit CPU in the circuit board 24, as shown in FIG.
The control unit CPLJ divides the motor 13 and image sensor 1 based on this output, and sends the read data to the other party (external).
The data is transferred to the computer COM.

Reference numeral 28 is a document mounting table connected to the guide member 7, and reference numeral 29 is a paper discharge table. Further, 30 is a guide member 7 and a document mounting table 3.
0 is a potentiometer that is slidably arranged in the main scanning direction (vertical direction in FIG. 1), 31 is a rail-shaped resistor extending in the sub-scanning direction, and 32 is a potentiometer that slides on the resistor 31. It is a contact member. A marker M2 is provided on the upper surface of the contact member 32. This potentiometer 30
The output is digitized by the A/D converter ΔDC and read into the control unit CPU immediately after the start button 27 is turned on (see FIG. 5). Note that the side surface 30'a of the potentiometer 30 on the document side also has the function of a lateral guide for the document.

Next, the operation of the above embodiment will be explained using FIG. 6.

After the device is powered on and initialized, it is in a state where image data can be transferred to the other party's computer COM, that is, when the ready signal of the computer COM is "Shi" (first When a document is inserted between the paper feed roller 10 and the driven roller 11 (see FIG. 6(a)), the first document detection sensor S1 is turned on (see FIG. 6(b)).
In synchronization with this, the motor 13 is turned on (started) (see FIG. 6(c)), and the document is sent to the left in FIGS. 1 and 3 by the paper feed roller 10. Then, when the document is fed a certain amount, the second document detection sensor S2 is also turned on (the sixth document detection sensor S2 is turned on).
(See figure (d)). The control unit CPU stops the motor 13 at the same time as the sensor S2 is turned on when detecting the second document. Then, it waits for the operator to set the cutting position of the original image and turn on the start button 27. The cutting start position of the original image is set by aligning the desired cutting start position of the original image with the marker M1 using the transport button 26, and the cutting end position is set by aligning the desired cutting start position of the original image with the marker M1 after the above setting. This is done by moving the contact member 32 to the desired cutting end position and aligning the marker M2. Here, since the speed when turning on this conveyance button 26 (see FIG. 6 (e)) and conveying the document is sufficiently slow, the operator can easily and accurately align the desired cutting start position with the marker M1. . When the operator turns on the start button 27 after positioning the markers M1 and M2 (6th
(see figure)), and in synchronization with this, the control unit CPU rotates the motor 13.

Therefore, the manuscript is sent again to the left side of Figures 1 and 3,
The sheet passes through the reading surface 2 while being pressed against the reading surface 2 by the guide member 7, and is ejected by the ejecting roller 12.

After the start button 27 is turned on, the control unit CPU operates for a predetermined period of time (the time until the part of the original on the marker MI reaches the reading position on the reading surface 2; is a constant value determined by the feeding speed of the paper feeding roller 10), and then sends a reading start pulse to the image sensor 1 (see FIG. 6 (h)). As a result, actual image *F1a capture is started. And marker M
When the time t2 for the part located at position 2 to reach the reading position on the reading surface 2 has elapsed, 1IIIIII part C
After the PU sends a reading end pulse to the image sensor 1 (
(See Figure 6 (S)) and confirm the end of paper ejection (A)) from the output of the third document detection sensor S3 (See Figure 6 (G))
, the motor 13 is stopped. The time t2 can be easily calculated because the position of the marker M2 is known from the output of the potentiometer 30. Note that if a pulse motor is used as the motor 13, the number of drive pulses supplied to the motor 13 corresponds to the amount of movement of the document, so in this case, control may be performed based on the number of drive pulses instead of the time t, t2. good.

According to the above configuration, the document image is read from the portion between the markers M1 and M2.
For example, if the start button 27 is turned on when it is at a position such as 1vA, the P
Only the O portion will be read.

Note that the present invention is not limited to the above embodiments, and various modifications are possible. For example, as shown in FIG. 7, two contact portions U33.32 are provided on the resistor 31 of the potentiometer 30 to indicate a cutting start position and a cutting end position, respectively, and a marker M3.32 is provided on each contact member 33.32. M2 may also be provided. In this case marker M3. M2
The position of is also read by the control unit CPU immediately after turning on the start button 27, but since there are two pieces of input data, for example, an analog data selector is disposed before the A/D converter ADC and read in time division. It turns out. In this case, reading starts when the portion of the document at the marker M3 reaches the reading position, and ends after the portion at M2 reaches the reading position. As mentioned above, when a pulse motor is used as the motor 13, it goes without saying that this sequence control can be performed based on the number of drive pulses.

Further, as the marker M1, a triangular marker or the like may be provided on the top surface of the device as shown in FIG. Furthermore, although the above description is for the case where the reading surface 2 is used as the bottom surface, it may be used with the reading surface 2 as the top surface or the side surface. However, if this is done, positioning of the markers M1 to M3 becomes somewhat troublesome. Further, the close contact of the original to the reading surface 2 can be achieved by simply arranging the guide member 7 with a very small distance from the reading section 2 (a mark slightly larger than the thickness of the original).

Further, the paper feed roller 10 and the paper discharge roller 12 may be driven by separate motors. Then, the paper ejection roller 12
The driving may be synchronized with the turning on of the second document detection sensor S2.

(Effects of the Invention) As described above, according to the present invention, the cutting position of a document image can be set while visually checking the document. Therefore, the cutting operation is easy.

[Brief explanation of drawings]

Fig. 1 is a plan view showing one embodiment of the present invention, and Fig. 2 is a plan view showing an embodiment of the present invention.
Planar configuration diagram showing the inside (principal part) of one embodiment of the figure, 3rd
The figure shows the configuration of main parts corresponding to the AA cross section in Fig. 2, the main part configuration diagram in Fig. 4 corresponds to the BB cross section in Fig. 2, and Fig. 5 shows the electrical configuration in an embodiment of the present invention. A block diagram, FIG. 6 is a timing chart showing the operation of the above embodiment/example, and FIG.
The figure is a plan view showing another embodiment of the present invention. 1... Image sensor 2... Reading surface 3.4...
Outer plate 4a...Extension part 6...Reading part
7, 8...Guide member 10...Paper feed roller 1
1... Followed roller 12... Paper ejection roller 15,1
7... Gear 18... Timing belt 19. 21... Pulley 23... Power supply 24... Circuit board 25... Operation panel 26... Transport button 27... Start button 28...・Document placement table 29... Paper discharge table 30... Potentiometer 31... Resistor 32... Contact members Ml, M
2. M3...Marker Sl...First document detection sensor S2...Second document detection sensor S3...Third document detection sensor Patent applicant Roku Konishi Photo Industry Co., Ltd. Representative Patent attorney I Shimafuji Jigai 1 person

Claims (3)

[Claims] (1) An image reading device that feeds a document to an image sensor and reads the document image therein is characterized in that a cropping position designation means for specifying an image cropping range on the document image is provided in the portion where the document is placed. image reading device. (2) The image reading device according to claim 1, wherein the cutout position specifying means includes a fixed marker indicating a cutout start position and a movable marker indicating a cutout end position. (3) The image according to claim 1, wherein the cutout position specifying means is composed of a first movable marker indicating a cutout start position and a second movable marker indicating a cutout end position. reading device.