JP2003169179A - Original image pickup device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an original image pickup device in which a picked-up image is sharp by handling image data from a plurality of image data transmitters on a display device having just one image data input part while saving a space for the pickup device and reducing costs. <P>SOLUTION: In a main body 1 (C) of the pickup device having an image sensor 2 and provided with a read means for reading image information on an original, a sub scan means for changing at a prescribed speed the relative positions of the image sensor and the image on the original in the direction orthogonal to the main scan direction of the image sensor, an image signal processing means for processing image signals read by the read means and the sub scan means and an image signal output means for outputting the image signals read by the read means and the sub scan means or image signals processed by the image data processing means to the display device, an image signal input means 35 is provided for inputting an image signal from any device except for the main body 1 (C) of the image pickup device and the image signal output means and the image signal input means 25 use the same I/F in terms of mechanism/signal. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an original image pickup apparatus, and more specifically, it reads an image of an original while automatically conveying the original, and generates a video signal from the read image information, and a projector, a CRT, or a liquid crystal display. The present invention relates to a device for outputting to an external device such as a display.

[0002]

2. Description of the Related Art Conventionally, for example, at presentations at academic conferences and various events, a presenter or the like has made a presentation using slides or an overhead projector (OHP).

On the other hand, in recent years, with the rapid spread of personal computers, presentations using a combination of a personal computer and a liquid crystal projector have been given. Even in this case, there is a strong demand to make a presentation using a printed material such as auxiliary material or handwritten material, and a document imaging device used in combination with a liquid crystal projector is required.

In order to meet such requirements, CC
An original image pickup device which reads image information of an original on a platen using a video camera using an area image sensor such as D and outputs image data as a video signal,
There is a so-called document camera, one example of which is shown in FIG.

In FIG. 33, numeral 133 is a video camera using an area image sensor, numeral 134 is a document table equipped with a back illuminating device for transparent originals such as OHP, and numeral 135 is an illuminating device for illuminating the original document on the document table 134. is there. FIG. 33
The document image pickup device as shown in (1) is commercialized as a device for making a presentation by connecting to a liquid crystal projector as a display device or a device for making an image input by connecting to a video conference device.

However, the original image pickup device using the area image sensor is a device using a video camera originally developed for shooting moving images. Therefore, when it is used as a device for giving a presentation by connecting to a liquid crystal projector, it is generally characterized in that an original of one screen can be taken in instantly, but it has the following drawbacks.

(1) Generally, the area image sensor is
The resolution is relatively low, and it is difficult to obtain sufficient resolution for reading and outputting characters such as document originals. (2) Since NTSC signals and S signals used in general color televisions and the like are used as output video signals, the characteristics cannot be utilized when a high-quality display device such as a liquid crystal projector is used as a transmission path. . (3) Since the optical path is a surface, it is difficult to reduce the size of the device by refracting the optical path by reflection from a mirror or the like over multiple stages, and thus the size of the device increases both during operation and during storage.

For this reason, a document image pickup apparatus using a linear image sensor, which is expected to have a higher resolution than the area image sensor, has been proposed. FIG. 34 shows a block configuration of an example thereof. FIG. 34 shows a block circuit diagram of a conventional original image pickup device 237 using a linear image sensor. Reference numeral 202 is a linear image sensor, 205 is an A / D converter for converting image information from the linear image sensor 202 into digital data, 2
Reference numeral 08 is a display memory for storing data from the A / D converter 205, 209 is a video signal generator, 211 is a CPU for controlling the operation of the entire apparatus, 212 is a ROM for storing a control program of the CPU 211, and 214 is an operation method designation. Switch 215, a display device such as a liquid crystal display, 216 an original read by this device, 238 a sub-scanning position detector, and 239 a sub-scanning drive mechanism.

[0009]

However, as shown in FIG.
In the conventional document image pickup device 237 using the linear image sensor shown in, the data of the read document is directly written in the display memory 208. For this reason, since the original cannot be read during display, the reading operation of the next original will be performed after the explanation of the screen being displayed has been completed and a screen switching request has been issued. It will be waiting time.

Further, in order to shorten the display time, the display memory 2
When 08 is mounted for a plurality of screens, it is possible to capture a plurality of documents in advance. However, in this case,
It takes a long time to read an original as a preparation, and in order to use many originals, the display memory needs to have a capacity corresponding to the number of originals, and a large-capacity memory needs to be mounted.

Further, although the linear image sensor 202 has a relatively high resolution, the display device 215 has a low resolution, so the data read from the original 216 is displayed in the display memory 20.
It is thinned out at the stage of being transferred to 8. Therefore, when it is necessary to rotate the screen after the display, the conversion is performed from the thinned data instead of the read original data, and the image deteriorates each time the conversion is performed.

Further, since the display memory 208 has a data structure determined by its circuit configuration, it cannot handle an image that has been arbitrarily compressed, resulting in poor storage efficiency. Further, in the method of reading a fixed original by driving an optical system including the linear image sensor 208, there is a problem that the apparatus becomes large in size, easiness of transportation and movement and freedom of selection of an installation place are not provided. Further, in a document image pickup device that needs to be connected to a personal computer, the operability from image pickup to display is poor, and the power is often turned on in the installed state, resulting in high power consumption. . In addition, a portable device has a high probability of an accident due to a shock or the like and a high failure rate.

An object of the present invention is to solve the above-mentioned problems and to achieve space saving and cost reduction in an optical system for illuminating and capturing an image of a document while achieving high dimming accuracy and a document image capturing device with a beautiful captured image. To provide.

[0014]

A first structure of a document image pickup apparatus according to the present invention has an image sensor, a reading unit for reading image information of a document, and a direction orthogonal to a main scanning direction of the image sensor. A sub-scanning means for changing the relative position of the image sensor and the original image at a predetermined speed, an image signal processing means for processing image data read by the reading means and the sub-scanning means, the reading means and the sub-scanning Image data read by the image signal processing means or image signal processing means for outputting the image signal processed by the image signal processing means to the display device, and the image signal is input from a device other than the image pickup device body. Image signal inputting means for

A second configuration of the original image pickup device according to the present invention is characterized in that the image signal obtained from the image signal input means is outputted from the image signal output means.

A third configuration of the original image pickup device according to the present invention is characterized in that the image signal obtained from the image signal input means is output from the image signal output means via the image signal processing means. And

In a fourth configuration of the original image pickup device according to the present invention, the image pickup device main body is provided with an image signal switching means, and an image signal obtained from the image signal input means is passed through the image signal switching means. It is characterized in that it is possible to select whether to output or to output the image signal obtained from the image signal processing means.

A fifth configuration of the original image pickup device according to the present invention is characterized in that the mechanical connection portions of the image signal output means and the image signal input means have the same shape.

According to a sixth aspect of the document image pickup apparatus of the present invention, the image signal output means and the image signal input means are:
It is characterized in that it has a path capable of communicating with the image signal processing means of the image pickup apparatus main body.

According to a seventh aspect of the original image pickup apparatus of the present invention, the image pickup apparatus main body connected to the display device is a first body, and the image pickup apparatus body connected to the first place body is a first body. A plurality of image pickup apparatus main bodies are sequentially connected so that the second image pickup apparatus main body is connected to the second image pickup apparatus main body and the image pickup apparatus main body connected to the second image pickup apparatus main body is a third image pickup apparatus main body. The main body controls the lower imaging device body, the lower imaging device body does not control the upper imaging device body, and the lower imaging device itself executes the upper control command.

In the first configuration, since the image signal input means for inputting the image signal from the device other than the image pickup device main body is provided in the image pickup device main body, the image signal of the device other than the image pickup device main body is sent to the image pickup device main body. Can be captured.

In the second configuration, the image signal obtained from the image signal input means is output from the image signal output means, so that the image signals of the apparatus other than the image pickup apparatus main body are connected to the image pickup apparatus main body. It can be displayed on a display device.

Further, in the third configuration, the image signal obtained from the image signal input means is output from the image signal output means via the image signal processing means, so that the image signal of an apparatus other than the image pickup apparatus main body is output. Can be arbitrarily processed in the main body of the image pickup apparatus and can be displayed on the display device connected to the main body of the image pickup apparatus.

Further, in the fourth configuration, the image signal switching means is provided, and the image signal obtained from the image signal input means is output or is obtained from the image signal processing means via the image signal switching means. Since it is possible to select whether to output an image signal, the image signal captured by the imaging device body and the image signal from other than the imaging device body can be easily displayed on the display device connected to the imaging device body while switching. can do.

Further, in the fifth structure, since the image signal output means and the image signal input means have the same shape of the mechanical connection portion, the image pickup apparatus main body is connected to a display device such as a projector and the like. Even if the connection part of is blocked, a plurality of image pickup device main bodies can be simultaneously connected in a chain, and a personal computer can also be connected.

Further, in the sixth configuration, the image signal output means and the image signal input means have a path capable of communicating with the image signal processing means (CPU) of the image pickup apparatus main body, so that image signals are input / output. It is possible to communicate with the device of the other party and to control the device of the other party without providing any other communication means with the device of the other party.

Further, in the seventh configuration, a plurality of image pickup device main bodies are connected to each other, and the image pickup device main body connected to the display device is used as the first body, and the image pickup device body connected to the first place body is used. The second-ranked aircraft, the imaging device main body connected to the second-ranked aircraft is the third-ranked aircraft, and subsequently connected in the same manner, and in each connected, the higher-order imaging device main body is the lower-order imaging device main body. Since the lower order imaging device body does not control the higher order imaging device body and the lower order imaging device itself executes the higher order control command, the first-ranked aircraft is connected to a display device such as a projector, Even if the connection part of the display device is blocked, a plurality of imaging device main bodies can be connected in a chain at the same time, and by controlling the first-ranked body, the lower-ranked bodies can be controlled and a large amount of originals can be processed. It is possible.

[0028]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. First, FIG. 1 and FIG.
With reference to, the outline of the document imaging apparatus 1 to which the present invention is applied will be described. FIG. 1 is an external perspective view showing an outline of an image display system configured by using the original image pickup device 1.
FIG. 2 is a diagram for explaining a state when the document imaging apparatus is in use, and is an external perspective view showing a case where a wireless signal of the remote controller is emitted toward the operation button.

The original image pickup device 1 to which the present invention is applied reads an image of an original while automatically conveying the originals one by one, and outputs the read image information to an external device such as a projector, a CRT or a liquid crystal display. In this embodiment, as shown in FIG. 1, the display device 15 which is a projector and the AC / DC converter 201 as a power supply device are used by being connected. Specifically, the manuscript image pickup device 1 displays by connecting the display communication cable 200 to the display device connection connector 32, which is the image signal output means according to the present embodiment, arranged in the device body C. Display device 15 connected to device 15
Various signals are transmitted and received to and from.

Further, the original image pickup apparatus 1 has an AC / DC converter 2 for the power supply connector 34 arranged in the apparatus main body C.
AC / D by inserting the plug from 01
DC power is input from the C converter 201. An image signal for inputting an image signal sent from an image signal generating device 30 other than a personal computer capable of transmitting image data or the image pickup device body C, along with the display device connection connector 32 of the device body C. An input connector 35 is provided. Then, by connecting the image data communication cable 202, the image signal sent from the image signal generating device 30 can be input. The display device connecting connector 32 and the image signal input connector 35 are set to have the same mechanical shape and signal standard.

Further, at the position of the arrangement, USB, RS232 conforming to the communication standard of the communication device 36 such as a personal computer other than the device main body C, a projector, a mouse, etc.
C, IEEE1394, PS / 2, etc. communication connector 3
3 is provided so that it can be connected to a personal computer or a projector and can be operated by communication with the personal computer, the projector or the like.
For example, if a USB connector or the like is used, the digital image signal of the personal computer is processed at any time, and the display device connecting connector 3 is used.
It is also possible to send an image signal to the display device 15 via 2 and display an image on the display device 15. Also, PS / 2, US
A B connector or the like may be provided so that an operation can be performed with a mouse, or the projector main body C can be operated from a projector.

Further, as shown in FIG. 1, the original image pickup apparatus 1 of the present embodiment has a small size and a portable size and outer shape which are convenient to carry. It should be noted that FIG. 1 shows a state before use of the document imaging apparatus 1, and in this state, document trays 18 and 118 described later are housed in the apparatus main body C and function as an exterior cover.

In using the original image pickup device 1, FIG.
The document trays 18 and 118 are opened, as shown in, and the document is set on the document trays 18 and 118 with the image surface of the document facing upward. Here, when using the document imaging device 1,
By pushing in the operation button 75 arranged on the upper surface of the apparatus main body C, the document trays 18 and 118 are opened as shown in FIG.
5 projects upward from the upper surface of the apparatus main body C. The detailed configuration and operation of the document trays 18 and 118 will be described later.

The manuscript image pickup apparatus 1 can be operated remotely using a remote controller (remote controller 79). As shown in FIG. 2, by irradiating the operation button 75 protruding from the upper surface of the apparatus main body C with the wireless signal output from the remote controller 79, each unit of the document imaging apparatus 1 described later operates. Then, the document set on the document trays 18, 118 is fed into the apparatus main body C, the image of the document is read, and the image information after the reading is supplied to the display device 15. Then, by displaying the image of the document on the display device 15, a presentation at various events or the like will be performed. In addition,
As an original that can be used in the original imaging apparatus 1, not only an opaque sheet such as paper but also a transparent sheet or a semitransparent sheet used for OHP or the like can be used. The details will be described later.

Next, with reference to the block diagram of FIG. 3, the circuit configuration of the original image pickup apparatus 1 of the present embodiment will be described. As shown in FIG. 3, the document imaging apparatus 1 includes a linear image sensor 2 as a reading unit for reading an image of a document, a document position detector 3 for detecting the position of the document, document feeding, sub-scanning drive, A / D that converts the output signals of the document driving mechanism 4 and the linear image sensor 2 for performing each discharging operation into A / D.
The D converter 5, the first buffer memory 6 for temporarily storing the output signal of the A / D converter 5, and the first buffer memory 6 are arranged in the subsequent stage to store data during display and after display. The second buffer memory 7 for storing after compression, the display memory 8 arranged in the subsequent stage of the first buffer memory 6 and the second buffer memory 7, and the output signal of the display memory 8 Display device 15
A video signal generator 9 for generating a video signal to be output to the digital camera, and an image signal processing unit according to the present embodiment for performing control of the entire document imaging apparatus 1 and information collection by communication C.
PU11, ROM12 which stores the control program and control data which CPU11 uses, display performance designating switch 13, operation method designating switch 14, image signal switching means 29, communication signal switching means 38, and communication device. Three
The communication means 28 conforming to the communication system of No. 6 is provided.

The linear image sensor 2 is a so-called line type reading sensor including a CCD and a contact sensor. The document position detector 3 detects the leading edge and the trailing edge of a document passing therethrough for switching the operation of the document driving mechanism 4, and supplies a detection signal to the CPU 11. The document driving mechanism 4 is provided with a document feeding mechanism, a sub-scanning driving mechanism, and a document discharging mechanism, and a large number of document bundles 17 held on document trays 18 and 118, which will be described later, are separated by the document separating and feeding mechanism.
It is separated into sheets and sent out. Then, the original 16 separated into one sheet is moved relatively to the linear image sensor 2 by the sub-scanning drive mechanism. At this time, the image of the original 16 is read by the linear image sensor 2 and then the original 16 is ejected out of the apparatus by the original ejection mechanism. The document driving mechanism 4
The specific configuration and operation of each mechanism will be described later.

In the original image pickup device 1, the image information of the original document 16 read by the linear image sensor 2 is supplied to the A / D converter 5 as an analog signal. And A /
After being converted to digital data by the D converter 5, it is first temporarily stored in the first buffer memory 6.
Here, the digital data stored in the first buffer memory 6 is supplied to the video signal generator 9 via the CPU 11 and the display memory 8, and the CPU 11 also performs compression processing and the like if necessary. It is stored in the second buffer memory 7 in the form of processed data. The digital data from the display memory 8 supplied to the video signal generator 9 is sequentially converted into a video signal by the video signal generator 9 and output to the display device 15.

On the other hand, the data stored in the second buffer memory 7 is processed by the CPU 11 (decompression processing in the case of compressed data) and the display memory 8 as required by the user or the like, and then the video signal generator. 9 and is output to the display device 15 after being converted into a video signal.

That is, in the original image pickup apparatus 1, the CPU
11 does not perform processing such as compression / expansion on the data stored in the first buffer memory 6, but performs processing such as compression / expansion on only the data stored in the second buffer memory 7. . First buffer memory 6 and second
Although the semiconductor memory is used as the buffer memory 7 in this embodiment, a non-volatile memory device such as a hard disk may be used together. First buffer memory 6
The capacity may be larger or smaller than the capacity of one original.

Here, the original 1 is stored in the first buffer memory 6.
When more than one sheet of data is accumulated, the display screen can be switched without actually performing the reading operation, so that the same switching time as that of the conventional device using the area image sensor can be realized. Further, even when the amount of data stored in the first buffer memory 6 is less than that of one original document, the time until display can be shortened according to the amount of storage. In this embodiment, the one having a capacity larger than that of one original is mounted.

On the other hand, the capacity of the second buffer memory 7 is
The capacity may be larger than the capacity of one document. In the document imaging apparatus 1 of the present embodiment, a capacity larger than the capacity of two documents is mounted, and step S in FIG.
When the available capacity is determined by the CPU 11 which will be described later at 61 and the available capacity is less than the capacity of one original to be transferred, there is no available space (second buffer memory 7).
Is full).

The CPU 11 controls the respective parts of the original image pickup apparatus 1, and further, the first transfer means and the first buffer which transfer data from the A / D converter 5 to the first buffer memory 6. Second transfer means for transferring data from the memory 6 to the second buffer memory 7, the first buffer memory 6 or the second buffer memory 7 to the display memory 8
It also has a function as a third transfer means for converting data into a predetermined display format and transferring the data.

The operation method designating switch 14 is specifically
It is composed of a document set detector 19 which will be described later, and a remote controller 79 for performing remote control by infrared rays. Remote control 7
The reference numeral 9 designates the operation of each part of the original image pickup apparatus 1 by outputting an operation signal by infrared rays to the original image pickup apparatus 1 when the user presses various buttons.

Further, the remote controller 79 is operated by pressing a predetermined button to switch the image signal switching means 29, FIG. 29 and FIG.
, A new original display described later, a rotation display described later in FIG. 31,
It is possible to give an operation instruction such as re-display described later with reference to FIG. The image signal switching means 29 receives an image signal from the video signal generator 9 or an image signal generating device 30 which is a device other than the device main body C from the image signal generating device 30 according to a command to press a button of the remote controller 79 operated by the user. Either the image signal is selected and the image signal is sent to the display device 15. The communication signal switching means 38 has the presence or absence of a device connected to the image signal input means 35 and the image signal output means 32,
The CPU 11 performs switching as necessary so that information can be collected and controlled by each device by communication, and that each device can be controlled if controllable, and functions to switch the communication line between the CPU 11 and each device.

The communication device 36 may be, for example, a device mainly handling an image signal such as a scanner, a video camera, a digital camera or a device to which these are applied, in addition to the above.

Further, in the case where a plurality of device bodies C in the embodiment of the present invention are connected and used, the display device 1
The device main body C connected to the No. 5 is an image signal input unit of the first rank machine, and the device main body C connected to the first rank machine is an image signal input unit of the second rank machine. The description will be made by replacing the connected device main body with the third main body, replacing the display device 15 with the upper device main body C, and replacing the image signal generator with the lower device main body C.

The first-ranked machine body (original image pickup device 1) to which the present invention is applied is used as a device for outputting read image information to the display device 15. Specifically, the first-ranked aircraft is connected to the display device 15 by connecting the display communication cable 200 to the display device connection connector 32, and transmits and receives various signals to and from the display device 15. To do.

The image signal input connector 35 (and the image signal output connector 32) has a path capable of communicating with the image signal processing means (CPU) 11 of the apparatus main body C. In the embodiment of the present invention, the VGA standard connector is adopted, the image signal is an analog signal, the communication signal is a digital signal, and it is on a separate line. Note that, for example, if a method of transmitting an image signal as a digital signal is adopted, it is possible to transmit the communication signal and the image signal on the same line.

Further, the first machine can be remotely operated using the remote controller 79. The second and lower aircraft will detect that the upper aircraft (the second aircraft is the first aircraft and the third aircraft is the second aircraft) is connected, and control itself. The information and the control information obtained from the lower machine are transmitted to the upper machine, and the wireless signal output from the remote controller 79 is set to be ignored in accordance with the control command transmitted from the upper machine.

When the upper machine is not detected and the lower machine is detected, it becomes the first machine, and when the upper machine and the lower machine are not detected, it becomes the original image pickup apparatus 1.
Therefore, when the second or lower aircraft is connected to the first aircraft, the upper aircraft controls the lower aircraft, but the lower aircraft does not control the upper aircraft, and it itself controls the upper aircraft. Is going to run. The first-ranked aircraft collects all of the control information of itself and the second and lower ranks, and based on the collected information, a command from the remote controller 79 causes it and the second-ranked aircraft.
Control the aircraft below the rank.

Next, the mechanical structure of the original image pickup device 1 will be described with reference to FIGS. Here, FIG. 4 and FIG. 5 are cross-sectional views showing the mechanical structure of the document imaging apparatus 1 according to the embodiment of the present invention. FIG. 5 is a cross-sectional view showing the document driving mechanism 4 from the opposite side of FIG. Figure 6
[FIG. 4] is a plan view showing a mechanism on the side of the document, which is a view of the document driving mechanism 4 from above. FIG. 7 is a plan view showing the mechanism on the document back side. 8 and 9 are views for explaining the document separating / feeding operation of the document driving mechanism 4. Further, FIG. 9 is an enlarged view showing a main part of the document separating and feeding operation.
FIG. 10 is a diagram for explaining the sub-scanning operation and the discharging operation of the document driving mechanism 4. FIG. 11 is an enlarged cross-sectional view showing a case in which there is no original document by extracting a portion of the optical system through which the original document passes in the original document imaging device. FIG. 12 is an enlarged cross-sectional view showing a case where there is a document by extracting a portion of an optical system through which the document passes in the document imaging device. FIG. 13 is a perspective view showing a main part of a document driving mechanism in the document imaging device, which is shown from below.

As shown in FIG. 4, the apparatus main body C of the original image pickup apparatus 1 is an upper case 9 which is a member forming the upper surface side of the housing.
7, an upper body A having a middle case 98, a lower case 99 that is a member forming the lower surface side of the housing, an auxiliary roller base 3
And a lower main body B having 9. In the document imaging apparatus 1, an operation button 75, which will be described later, is attached to the upper case 97 so as to be able to reciprocate in the vertical direction, and the document trays 18, 118 are provided with the auxiliary roller base 39 and the lower case 9.
It is provided at a position between 9 and 9 so as to be openable and closable.

As shown in FIGS. 4 and 5, a main control board 31 is disposed above the inside of the apparatus main body C. The main control board 31 includes the A / D converter 5, the first buffer memory 6, the second buffer memory 7, the display memory 8, the video signal generator 9, the display device information reader 10, and the CPU 11 described in FIG. , A main control circuit such as the ROM 12 and a light receiving element 77, which will be described later, facing a reflecting surface of a reflecting mirror 76, which will be described later.

Further, as shown in FIG. 4, the main control board 3
On the upper surface side of 1, the above-mentioned display device connecting connector 3
2, a communication connector 33, a power supply connector 34, and an image signal input connector 35 are connected, and these respective connectors are attached through respective openings formed in the side surface of the apparatus main body C (more specifically, the upper main body A). To be Further, the linear image sensor 2 is arranged on the lower surface side of the main board 31.

The apparatus body C (more specifically, the upper body A)
A separation roller 21, a feeding roller 20, a main roller 22, and a discharge roller 23 are arranged in this order from the upstream side as a constituent member of the document driving mechanism 4 described in FIG. In the space formed by the feeding roller 20, the main roller 22, and the main control board 31, the main roller 22
The connecting roller 26, which is a cylindrical or spherical member that transmits the driving force only from the feeding roller 20 to the feeding roller 20, is loosely fitted.

The document drive mechanism 4 is a component for driving each of these rollers, and is integrated with the drive motor 100 as a drive source and the output shaft of the drive motor 100 as shown in FIGS. Motor gear 10 configured as
1 and gears 102, 103, 108, 111, 113, 114 to which driving force is sequentially transmitted from the motor gear 101 are arranged. In this embodiment, the drive motor 10
A stepping motor is used as 0.

Here, as shown in FIG. 5, the motor gear 1
01 has a common shape with respect to the transmission gear 102 that meshes with
The two transmission gears 103 and 113 mesh with each other, and the transmission gear 113 is meshed with the discharge drive gear 114 coaxial with the discharge roller 23. On the other hand, the main drive gear 108 coaxial with the main roller 22 meshes with the transmission gear 103, and the main drive gear 1
08, the feeding drive gear 111 coaxial with the feeding roller 20 meshes. Each of these gears is rotatably attached to the gear base plate 119, and
Each shaft is rotatably supported by bearings 68 and 69 shown in FIG. Here, the bearings 68 and 69 are bearings for the feed roller shaft 47, the main roller 22, and the discharge roller 23.

As shown in FIG. 13, the thrust direction of the main drive gear 108, the feed drive gear 111, and the discharge drive gear 114 among the gears are regulated by the gear base plate 119. The gear base plate 119 has a function of pressing the above-mentioned respective gears to rattle the rotational sliding play and the axial thrust play of the main roller 22 and the discharge roller 23. Specifically, the gear base plate 119 is a plate-shaped member having a spring property, and has gears 108, 111, 1
Holds 14 so that it does not fall out. Further, the gear base plate 119 is provided with the feed roller shaft 4 via the feed drive gear 111.
7 through the main drive gear 108 to the main roller 22
Of the discharge roller 23 through the discharge drive gear 114.
Each of the shaft parts is pressed by spring pressure in the axial thrust direction.

Further, as shown in FIG. 13, the gear base plate 119 has an urging portion 119a for urging the shaft portion of the main roller 22 to which the gear 108 is attached in the radial direction. The main roller 22 is set so that the spring pressure is also applied in the radial direction, and there is a rattling of the play of a bearing 69, which supports the shaft of the main roller 22, with a sliding fitting hole (not shown). We are working together.

In the present embodiment, by providing the gear base plate 119 as such a rattling member, the rattling corresponding to the driving force of the drive motor 100 is performed, and the meshing portion of each gear and the bearing 69. The rattling vibration generated in the fitting sliding portion of the shaft hole is suppressed, and the silent operation of the document driving mechanism 4 is realized. Particularly, when the drive motor 100 is a drive source accompanied by vibration such as a stepping motor as in the present embodiment, vibration of the drive source itself due to vibration of the stepping motor and transmission from the drive source to the apparatus main body C and the like. Vibration is reduced, generation of noise is prevented, and quiet document driving is secured, so that the effect is great.

As shown in FIG. 4, FIG. 5 and FIG. 13, in the present embodiment, the document driving mechanism 4 such as a gear for transmitting the driving force of the driving motor 100 to drive and the presence or absence of the document and the position thereof are detected. All the detection means (document position detector 3 and document set detector 19) for doing so are configured to be concentrated on one side (upper body A) with the document 16 as a boundary. Further, auxiliary members and mechanisms for separating the originals and driving the sub-scan are concentrated on the opposite side (lower main body B).

By adopting such a structure as the document driving mechanism 4 and the like, it becomes possible to easily separate and remove it. Further, it becomes possible to easily clean and maintain the document passage of the document driving mechanism 4. In addition,
Details of other components and operations of the document driving mechanism 4 will be described later.

As shown in FIG. 4, a primary separation pad 61 and a primary separation pad 61 are disposed below the inside of the apparatus main body C (specifically, the lower main body B) in the vicinity of the leading end set position of the original stack 17 and downstream thereof. A secondary separation pad 62 located downstream of the feeding roller 20 and facing the main roller 22 and a main auxiliary roller 65 that drives the original 16 in pairs with the main roller 22 and a discharging roller 23. Then, the discharge auxiliary roller 66 that discharges the original 16 in pairs with the discharge roller 23, the main auxiliary roller 65, and the discharge auxiliary roller 6
6 are arranged, an auxiliary roller spring 37 for urging each of them upward, a member such as an optical system, such as a backside illuminating unit for the original document and a white plate 25 that also functions as a dimming unit for the linear image sensor 2. To be done.

4 and 5 show the state in which the original 16 is being read while being conveyed. As can be seen from these drawings, in the document imaging apparatus 1, the control board 3
1, a linear image sensor 2, a document position detector 3, a document driving mechanism 4, a display device connection connector 32 which is an image signal output means of the present embodiment, a communication connector 33, a power connector 34, an image signal of the present embodiment. The image data input connector 35 that is an input unit, the shaft of the drive motor 100, the operation button 75, and the like are arranged on one side (upper side) with the document 16 being read as a boundary.

Next, details of the optical system in the original image pickup apparatus 1 will be described. The image sensor 2 shown in FIG.
When the light source unit 2c illuminates an original document passing between the white plate 25 and the glass unit 2b, the sensor unit 2a receives the reflected light of the original document by the illumination. At this time, the white plate 25 gives the reflected light, which is the reflected light from the light source unit 2c, to the sensor unit 2a. Therefore, when there is no document, the sensor unit 2a receives the reflected light. Then, at this time, the sensitivity of the linear image sensor 2 is adjusted by the CPU 11 based on the reflected light of the white plate 25, so that the white plate 25 and the CPU 11 constitute the light control means of the present embodiment. When reading a transparent original such as the OHP sheet described above, the light emitted from the light source unit 2c passes through the transparent original, is reflected by the white plate 25, passes through the transparent original again, and is received by the sensor unit 2a. Therefore, the white plate 25 serves as a back lighting unit. In this embodiment, as the light source unit 2c,
A 3-color LED is used.

The glass portion 2b is for contacting and sliding the original 16 in the optical path of the sensor portion 2a. The glass part 2b should just be a transparent member which transmits light uniformly.
Further, since the original 16 slides, if the abrasion resistance, the slidability, and the strength are necessary and sufficient, the original 16 may be made of a transparent resin such as polycarbonate or a surface of a transparent resin such as polycarbonate even if it is not glass. It may be replaced by treatment such as abrasion resistance, sliding, and reinforced coating.

Next, details of the operation of the document driving mechanism 4 in the document imaging apparatus 1 will be described with reference to FIGS. As shown in FIGS. 7 and 8, the document driving mechanism 4 of the document imaging device 1 has a separation roller 21 and a feeding roller 20 as constituent members of the document separating and feeding mechanism. And
A main roller 22 is provided on the downstream side of the feeding roller 20 as a constituent member of the sub-scanning drive mechanism.
A discharge roller 23 is provided on the downstream side as a constituent member of the sub-scanning drive mechanism and the document discharge mechanism. The discharge roller 23 is a member that serves as both the sub-scanning drive mechanism and the document discharge mechanism of the document drive mechanism 4.

Further, a connecting roller 26 is provided so as to be loosely fitted between the main roller 22 which is a part of the sub-scanning means and the feeding roller 20 which is a part of the separating / feeding means. It is connected to the feed roller 20. Connecting roller 2
Due to the weight of 6, the main roller 22 and the feeding roller 20
The connecting roller 26, which is evenly supported by and biases the main roller 22 and the feeding roller 20 evenly in the direction of gravity. In this embodiment, it is premised that the apparatus main body C is used with the downward direction of FIG. 9 as the vertical downward direction, but when using the upward direction of FIG. 9 as the vertical downward direction, an elastic member such as a spring is used. The connecting roller 26 may be uniformly biased to the main roller 22 and the feeding roller 20.

In FIG. 8, the feeding roller 20 and the separating roller 21 separate one original 16 'out of the original bundle 17 stored in the original tray 18 (118) from the other and separate the original tray 18 (118). The drive roller functions as a separating / feeding unit that feeds the document from the document to the document reading unit. on the other hand,
The main roller 22 and the discharge roller 23 are drive rollers for performing sub-scanning for moving the document 16 relative to the linear image sensor 2. These rollers 20, 2
1, 22, 23 and the connecting roller 26 are adapted to rotate when the driving force of the drive motor 100 shown in FIG. 5 is transmitted.

Here, in the document driving mechanism 4, the document separating and feeding mechanism and the sub-scanning driving mechanism need to be driven independently. In the embodiment of the present invention, by switching the rotation direction of the drive motor 100, which is a power source, and combining the one-way clutch such as a spring clutch, the friction clutch mechanism, and the connecting roller 26, one power source can be used. These two mechanisms can be driven independently.

When operating the document drive mechanism 4, the document set detector 1 shown in FIGS. 8, 10 and 13 is used.
9 and the output signal of the document position detector 3, the CPU
Each operation of the document drive mechanism 4 is performed by the control of the rotation direction and the rotation speed of the drive motor 100 by 11.

Here, the document set detector 19 is arranged in the vicinity of the separation roller 21 and detects when a document is set on the document trays 18 and 118. On the other hand, the document position detector 3 detects the positions of the leading edge and the trailing edge of the document at the time of conveyance, and is located between the feeding roller 20 and the main roller 22 at the time of conveyance of the document or on the main roller 22. When the leading edge or the trailing edge of the document passes a predetermined position near the downstream side, the output signal changes.

Next, the mounting portions of the rollers 20 to 23 and the connecting roller 26 will be described. Separation roller 21 which is a part of separation feeding means on the upstream side of the document driving mechanism 4.
Is a roller for separating the uppermost one original and abutting it against the feeding roller 20 when a plurality of originals (original bundle 17) are placed at fixed positions on the original trays 18 and 118. And is attached to the separation roller shaft 48.
As shown in FIG. 6, the separating roller shaft 48 has a positioning lever 45 for positioning a document and a positioning lever 45.
Positioning lever pushing spring 5 that pushes left or right
8 and a positioning lever friction plate 59 that is in sliding contact with the positioning lever 45 are attached.

The positioning lever 45 is used for the original stack 17 on the original trays 18 and 118 when the original drive mechanism 4 operates.
Is a lever for holding the document at a predetermined position,
At the start of separation of 7 and the feeding, the original 16 is passed by rotating and retracting upward. Further, during the next sub-scanning operation, by rotating in the opposite direction, the originals in the sub-scanning operation are pressed appropriately and the drawing of the original bundle 17 is prevented. This operation will be described later.

Further, as shown in FIG. 6, the separation roller shaft 48
Is rotated by a transmission belt 53, which is a toothed timing belt, in synchronization with a feeding roller shaft 47, which will be described later, and a separation pulley 52 for mounting the transmission belt 53 is attached.

Downstream of the separation roller 21, as shown in FIGS. 7 and 9, a primary separation pad 61 and a secondary separation pad 6 are provided.
2 is placed. The primary separation pad 61 is the separation roller 2
Two are arranged at equal intervals on the left and right in the width direction of the document with 1 as the center. The secondary separation pad 62 is arranged at one position from the downstream side of the primary separation pad 61 to the lower side of the feeding roller 20, and is held by the secondary separation lever 63 as shown in FIG. Is the separation lever spring 6
The feeding roller 2 is urged upward by
0 is pressed against the feeding roller 20 and the feeding roller shaft 47
It is designed to urge in the direction of.

The feeding roller 20 feeds the original document to the main roller 2
2, which is a roller for feeding and abutting the sheet to the sheet 2, and is attached to the feeding roller shaft 47 shown in FIGS. 4 and 6. The transmission belt 5 is attached to the feeding roller shaft 47.
3, a feeding pulley 51 for passing around 3, and a feeding roller 20.
Two one-way clutch mechanisms 54 for rotationally driving only one direction, two stop levers 46, and a stop lever pressing spring 55 for pressing each stop lever 46 in the right or left direction in FIG. A stop lever friction plate 56 that is in sliding contact with each stop lever 46 is attached. The stop lever 46 is a lever for holding the positioning lever 45 attached to the separation roller shaft 48 at a specific position, and the holding operation will be described later.

A feeding drive gear 111 is attached to one end of the feeding roller shaft 47 via a torque limiter 112. The torque limiter 112 absorbs the load between the feeding drive gear 111 and the feeding roller shaft 47 by starting to slide when a torque load of a certain torque or more is applied. For example, when it is necessary to set a long time for hitting a document on the main roller 22 as described later, the document and the feeding roller 20 or the separation roller 2
When the frictional force with 1 and the abutting force become larger than the constant torque, the torque limiter 112 works to stop the rotation of each roller, and the original is not damaged. Main roller 2
The torque limiter 112 can be omitted if the time for hitting the position 2 can be set to be short.

As shown in FIGS. 6 and 13, one main roller 22 is attached to its shaft portion. A main drive gear 108 integrated with a one-way clutch 108a is attached to one end of the shaft portion.
The one-way clutch 108a allows the main roller 22
Is adapted to transmit only the rotational driving force in the clockwise direction in FIG.

Similarly, one discharge roller 23 is attached to the shaft portion, and the discharge drive gear 114 integrated with the one-way clutch 114a is attached to one end side of the shaft portion. There is. The one-way clutch 114a allows the discharge roller 23 to transmit only the rotational driving force in the clockwise direction in FIG. The main roller 22 and the discharge roller 23 are made of the same member and rotate in synchronization with each other.

Next, with reference to FIG. 8 and FIG. 10, the document separating / feeding operation, the sub-scanning driving operation, and the discharging operation of the document in the document driving mechanism 4 will be described. Here, FIGS. 8 and 10 are views for explaining the document feeding operation.
FIG. 8A shows a state in which the document is placed at the specified position.
FIG. 10B shows a state in which the document hits the main roller 22, and FIG. 10A shows a state in which the sub-scanning drive is in progress.
The discharge operation states are shown in (b).

Before the document is inserted, the document driving mechanism 4
In FIG. 8, the separation roller shaft 48 supporting the separation roller 21 and the positioning lever 45 is in the state shown by the solid line in FIG. In this state, the positioning lever 45 prevents the separation roller shaft 48 from descending and secures a space between the auxiliary roller base 39 and the separation roller 21 in which a document can be inserted. Before the document is inserted, the document set detector 19 is in the state shown by the chain double-dashed line in FIG.

When the original stack 17 is inserted from the right side, as shown in FIG. 8A, the positioning lever 45 is inserted.
The abutting portion of is abutted against the front end of the document stack 17 and prevents the front end of the document from being inserted more than the specified amount. At this time,
As shown in (a), the stop lever 46 is set to block the right rotation of the positioning lever 45 at the specified position, and blocks the rotation of the positioning lever 45. Therefore, even if a strong sheet such as an OHP sheet is vigorously inserted and is abutted against the positioning lever 45 with a strong force, the positioning lever 45 does not rotate around the separation roller shaft 48 and escape. , The insertion position of the document is always kept constant.

When the original is inserted at the fixed position, the arm of the original set detector 19 is rotated clockwise from the position shown by the broken line in FIG. 8 (a). As a result, the document set detector 19 operates to detect that the document is set at a fixed position.

In FIGS. 5 and 8, the drive motor 100
Represents the rotational force of the document feeding operation direction (clockwise rotation in FIG. 5), gear 101 (clockwise rotation in FIG. 5), gear 1
02 (same left rotation), gear 103 (right rotation), gear 108
When it is transmitted to the feeding drive gear 111 (right rotation) via (left rotation), the driving force is less than the specified torque of the torque limiter 112 and is transmitted to the feeding roller shaft 47. Further, the stop lever 46 described above is rotated clockwise by the friction clutch mechanism including the stop lever pressing spring 55, the friction plate 56, the feeding pulley 51, and the like.
Then, the contact with the positioning lever 45 is released. As a result, the positioning lever 45 can be rotated.

As can be seen from FIG. 5, during the feeding operation, the gear 103 rotates clockwise (rotates right) so that the main drive gear 108 and the discharge drive gear 114 via the transmission gear 113 reverse. Rotate clockwise (counterclockwise). At this time, the one-way clutch mechanism 108a integrally formed with the main drive gear 108 and the one-way clutch mechanism 114a integrally formed with the discharge drive gear 114 are operated. Therefore, the main roller 22 connected to the main drive gear 108 via the one-way clutch mechanism 108a and the discharge roller 23 connected to the discharge drive gear 114 via the one-way clutch mechanism 114a do not rotate together.

Further, the driving force transmitted to the feeding roller shaft 47 causes the feeding roller shaft 47 to rotate in the clockwise direction, so that the feeding pulley 51, the transmission belt 53, and the separation pulley 52.
The driving force is transmitted to. The driving force transmitted to the separation pulley 52 is transmitted to the separation roller 21 configured to rotate integrally with the separation pulley 52, and the separation roller 21 rotates clockwise in FIG. 8B. Furthermore, the driving force of the separating roller 21 causes the positioning lever 45 to rotate clockwise in FIG. 8B by a friction clutch mechanism including a positioning lever pressing spring 58, a friction plate 59, a separating pulley 52, and the like. . Then, the restraint of the leading end of the document and the restraint of the lowering of the shaft 48 are released, and the shaft 48 configured to be rotatable around the shaft 47 rotates in the clockwise direction. And the axis 48
The separating roller 21 supported by the
The separation roller 21 comes into contact with one of the document bundle 17 and starts feeding the document. When the feeding of the original is started, the original 16 'which is in contact with the separation roller 21 moves leftward in FIG.

Here, the frictional force acting between the separating roller 21 and the original 16 'is larger than the frictional force between the original bundle 17 and the original 16', and the original bundle 17 and the original bundle 17 contact each other. The document 16 'is properly separated from the document stack 17 by the separating roller 21 provided that the frictional force between the document stacking member 17 and the document stack 16' is greater than the frictional force between the document stack 17 and the document stacking member. The original 16 'separated by the separation roller 21 is
While abutting on the primary separation pad 61 while dragging the document stack 17, and advancing along the inclination of the primary separation pad 61,
The tip is sent first. The leading edge of the original 16 'comes into contact with the feeding roller 20, is sandwiched between the original 16' and the secondary separation pad 62, and is further fed to the left in FIG.

At this time, the peripheral speed of the document grip surface of the feeding roller 20 is set to be higher than the peripheral speed of the document grip surface of the separation roller 21. In the setting method, the diameter of the feeding roller 20 is made larger than the diameter of the separation roller 21 in this embodiment. Even when the diameters of the feeding roller 20 and the diameter of the feeding roller 20 must be set to be smaller than the diameter of the separating roller 21, the feeding pulley 51 and the separating pulley 52 must be the same.
It is easy to establish the relationship between the peripheral speeds by adjusting the diameter of the gears or adjusting the gear ratio by connecting gears or the like.

Further, the feeding roller 20 and the separating roller 21
The secondary separation pad 62 is arranged in the document path between the two as described above, and as shown in FIG. 9, the secondary separation pad 62 is secondary to the tangent line connecting the periphery of the document grip surfaces of the feeding roller 20 and the separation roller 21. The protrusion 62a of the separation pad 62 is set to protrude by h in the roller axial direction. This h is 0 or more, and is appropriately determined in consideration of the peripheral speed difference, the frictional force of the secondary separation pad 62, the spring force of the separation lever spring 64, the type of the document, and the like.

By setting the peripheral speed difference between the feeding roller 20 and the separating roller 21, tension is generated on the original document between the feeding roller 20 and the separating roller 21. The original document pushes the projecting portion 62a so as to follow the tangent line shown in FIG. 9, and the original document always contacts the projecting portion 62a of the secondary separation pad 62. For example, even if there is a second and subsequent document bundles that have passed over the primary separation pad 61 and are dragged by the document 16 ′, they can be prevented by the protruding portion 62 a of the secondary separation pad 62.

Then, the leading end of the document 16 'abuts on the arm of the document position detector 3. Then, as shown in FIG. 8B, by rotating the arm portion in the clockwise direction,
The document position detector 3 is activated. As a result, the document position detector 3 detects the leading edge of the document, and in this embodiment, when the document position detector 3 detects the document leading edge, the feeding operation is maintained for a certain period of time. The leading edge of the original 16 'comes into contact with the stationary main roller 22 and is sandwiched between the main roller 22 and the main auxiliary roller 65 to prevent the leftward feeding (FIG. 8 (b)). )reference).

The rotation direction is switched by the CPU 11 so that the drive motor 100 rotates in the opposite direction after a lapse of a set time sufficient to cause the leading end of the original 16 'to evenly abut against the main roller.

Subsequently, the rotation direction of the drive motor 100 is switched as described above, whereby the drive motor 10
0 is rotation in the direction opposite to the document feeding operation direction (counterclockwise rotation in FIG. 5, counterclockwise rotation). The rotational force of the drive motor 100 is the gears 101, 102, 10
When transmitted to the feeding drive gear 111 via 3, 108, the driving force is transmitted to the feeding roller shaft 47 with a force equal to or less than the specified torque of the torque limiter 112. At this time, the gear 103 rotates counterclockwise in FIG. 5 (counterclockwise rotation).
Then, the main drive gear 108 and the discharge drive gear 114 via the transmission gear 113 rotate clockwise (clockwise rotation), respectively.

In this case, the one-way clutch mechanism 108a integrally formed with the main drive gear 108 and the one-way clutch mechanism 114a integrally formed with the discharge drive gear 114 do not operate and the main roller 22 and the discharge roller 23 is both FIG. 5 and FIG. 10 (a)
And the main auxiliary roller 65 and the discharge auxiliary roller 66 are driven to rotate in the counterclockwise direction.

The counterclockwise rotation driving force transmitted to the feeding roller shaft 47 is applied by the clutch mechanism 45 to the feeding roller 20.
Is not transmitted to. At this time, when the main roller 22 rotates in the clockwise direction, the connecting roller 26 that comes into contact with the main roller 22 is moved in the rotation direction of the main roller 22 around the circumference of the main roller 22 about the axis of the main roller 22. , Abut on the feeding roller 20. When entering the wedge-shaped portion between the main roller 22 and the feeding roller 20, the connecting roller 26 starts to rotate counterclockwise around its own axis, and the feeding roller 20 contacting the connecting roller 26 also starts rotating to the right.

Normally, the leading edge of the original 16 'is wound up by the rotational driving force of the main roller 22 and the pressing force of the main auxiliary roller 65 against the main roller 22, and FIG.
It is sent to the left in (a). Even when the winding force is weak, the driving force is transmitted to the document by the right rotation of the feeding roller 20, and the document is reliably fed in the left direction. Then, in the document driving mechanism 4, based on the control of the CPU 11, the front end of the document 16 'is wound around the main roller 22 and the main auxiliary roller 65, and then, quickly a predetermined distance in the leftward direction in FIG. After feeding the leading edge of the document, the sub-scanning operation for reading the document is started at a required speed. Naturally, even during the sub-scanning operation, the driving force is continuously transmitted to the original document that is in contact with the feeding roller 20.

In the present embodiment, the connecting roller 26 is a cylindrical or spherical member, but the contacting surface of the connecting roller 26 with the main roller 22 and the feeding roller 20 is provided with an uneven surface or rubber. By providing such a friction member, it is possible to easily set the driving force of the main roller 22 to be transmitted to the feeding roller 20 at a high rate. For example, in the relationship between the gear that operates integrally with the main roller 22, the loosely fitted connecting gear, and the gear that operates integrally with the feeding roller 20, the circumferences of the document grip surfaces of the main roller 22 and the feeding roller 20 are also considered. The gear ratio may be set so that the speeds are the same.

The connecting roller 26 is characterized in that the driving force of the main roller 22 is transmitted to the feeding roller 20, but the driving force of the feeding roller 20 is not transmitted to the main roller 22. For example, when the feeding roller 20 rotates to the right as shown in FIG. 8B, the feeding roller 20 displaces the connecting roller 26,
The feeding roller 20 is rotated clockwise about the axis on the circumference of the feeding roller 20, and the connecting roller 26 is rotated counterclockwise about its own axis. The connecting roller 26 loosely fitted as described above is the main roller 2
It has a space that can be separated from 2. Therefore, the connecting roller 26 does not transmit the driving force of the feeding roller 20 to the main roller 22 due to the force of the connecting roller 26 escaping from the main roller 22. Provisional feeding roller 20
When the peripheral speed of the main roller 22 exceeds the peripheral speed of the main roller 22, the transmission of the driving force from the main roller 22 to the feeding roller 20 is released.

The rotation speed of the drive motor 100 during the separate feeding operation is arbitrary, but in the present embodiment, the CPU 11
The drive motor 100 is controlled so as to have different proper rotation speeds in the processes of separating, feeding, reversing, feeding, sub-scanning, and discharging the document. The document feeding speed for sub-scanning (peripheral speed of the main roller 22) is adapted to the capability of the image sensor 2, and the document feeding speed for separating, feeding, and discharging (peripheral speed of the feeding roller 20) is sub-scanning. Is set higher than the document conveyance speed, and naturally the peripheral speed of the feeding roller 20 is different between the separation feeding and the sub-scanning.

Subsequently, the original image pickup device 1 shifts to the sub-scanning operation of the original document. The following is manuscript 1 for clarity.
Document 6 will be described as manuscript 16 from the time of shifting to the sub-scanning operation.

Motor gear 101, transmission gears 102, 11
The driving force of the drive motor 100 transmitted to the discharge driving gear 114 via 3 causes the discharge roller 23 connected to the discharge driving gear 114 by the one-way clutch mechanism 114a integrally formed with the discharge driving gear 114. Figure 10
Rotate clockwise as shown in (a). At the same time, the discharge auxiliary roller 66 is driven to rotate counterclockwise.

As can be seen from FIG. 5, the transmission path from the transmission gear 102 to the main drive gear 108 and the transmission path from the transmission gear 102 to the discharge drive gear 114 are set in the same rotation direction. In addition, the main drive gear 10
8 and the discharge driving gear 114, and the main roller 22 and the discharge roller 23 are configured by common parts, the main roller 22 and the discharge roller 23 rotate in the same direction in synchronization.

In the original drive mechanism 4, the main drive gear 10
The driving force of the drive motor 100 is transmitted from 8 to the feeding drive gear 111. The driving force transmitted to the feeding drive gear 111 is further transmitted to the feeding roller shaft 47 via the above-described torque limiter 112 and a knock pin (not shown). Further, in the present embodiment, the rattling of the knock pin interposed in the transmission path to the feeding roller shaft 47 causes the feeding roller shaft 47 to start rotating always behind the main roller 22. Therefore, in FIGS. 8B and 10A, the feed roller shaft 47 starts to rotate after the leading edge of the document 16 'is sufficiently wound between the main roller 22 and the main auxiliary roller 65. Has become.

Then, the driving force transmitted to the feeding roller shaft 47 causes the feeding roller shaft 47 to rotate counterclockwise in FIG. 10A. On the other hand, the feeding roller 20
Is in a state in which the driving force is cut off via the one-way clutch mechanism 54, and the connection with the roller 26 and the original 1
6 receives the frictional force moving to the left, and is driven to rotate clockwise as shown in FIG. On the other hand, the stop lever 46 attached to the feeding roller shaft 47 is counterclockwise as shown in FIG. 10A by a friction clutch mechanism including a stop lever pressing spring 55, a friction plate 56, a transmission cylinder 57, and the like. The rotation in the rotating direction is started. When it comes into contact with the original 16 ', this counterclockwise rotation is suppressed.

When the feeding roller shaft 47 rotates counterclockwise, the driving force is transmitted to the feeding pulley 51, the transmission belt 53, and the separation pulley 52. Here, the driving force transmitted to the separation pulley 52 is transmitted to the separation roller 21 configured to rotate integrally with the separation pulley 52, and the separation roller 21 is counterclockwise as shown in FIG. Rotate around. Further, the driving force of the separation roller 21 is transmitted to the positioning lever 45 via the friction clutch mechanism including the positioning lever pressing spring 58, the friction plate 59, etc., so that the positioning is performed as shown in FIG. The lever 45 starts rotating counterclockwise.

When the positioning lever 45 comes into contact with the original document 16 in the sub-scanning operation, the friction clutch mechanism prevents rotation of the original document 16 in the counterclockwise direction, and the original document 16 is pressed downward with an appropriate force. . Here, since the document 16 is appropriately pressed by the positioning lever 45 at the intermediate portion with the primary separation pad 61 and the secondary separation pad 62 as the fulcrum, the document bundle 17 is pulled down even during the sub-scanning operation. There is nothing.

Further, the driving force transmitted to the feeding roller shaft 47 causes the separating roller shaft 48, which is rotatable around the feeding roller shaft 47, to rotate counterclockwise.
Then, since the separation roller 21 is released from contact with the original document 16, even if the separation roller 21 rotates in the counterclockwise direction as described above, the force for returning the original document 16 from the feeding direction is not provided.

Then, as shown in FIG.
When the rear end of 6 passes through the contact portion with the positioning lever 45 and the contact portion with the stop lever 46, the document 16
The positioning lever 45 and the stop lever 46, which are prevented from rotating counterclockwise by the above, sequentially start rotating counterclockwise. Here, the positioning lever 45
Returns the leading end of the document stack 17 that has risen in the middle of the inclination of the primary separation pad 61 to the specified position. On the other hand, the stop lever 46 returns to the position that inhibits the clockwise rotation of the positioning lever 45. Then, the driving motor 100 is stopped after the document 16 is discharged, so that the positioning lever 45 and the stop lever 46 return to the state of FIG.

Details of the document reading unit will be described with reference to FIGS. 11 and 12. FIG. 11 is an enlarged view of the document reading unit of FIG. 4, which is a view seen from the back side of FIG. 4 and shows a state in which there is no document. FIG. 12 shows a state in which there is a document as compared with FIG. In FIG.
The white plate 25, which is a member of the lower main body B, is composed of a sheet-shaped member having elasticity, and one end side thereof is fixed to the slope portion 39a of the auxiliary roller base 39 with an adhesive tape or the like. In addition, between the glass portion 2b and the original 16,
Immediately before the right side (upstream) of the sensor unit 2a, a spacer 24, which is a member of the upper main body A and is integrally attached to the middle case 98 that is a housing of the upper main body A and is a plate-like member having elasticity, is installed. To be done. Then, the original 16 and the sensor portion 2a
A gap with the glass portion 2b in the optical path is secured.
The end 24d of the spacer 24 is the closest position that does not hinder the reading range of the sensor unit 2a, and is set at the upstream position of the document conveyance.

Here, the lower surface (contact surface with the original) of the glass portion 2b and the inclined surface portion 39a are not parallel, but the inclined surface portion 39a.
Is a slope of about 15 °. The white plate 25 is
It is set in a state in which the cross section has a substantially mountain shape, and the free end contacts the end 2d of the image sensor 2 and the end 2 of the spacer 24.
The spacer 4 is in contact with the spacer 4d. Therefore, the angle formed between the upper surface of the white plate 25 (contact surface with the original) and the lower surface of the glass portion 2b (contact surface with the original) is not 0 ° β °
Is set to.

Further, the glass portion 2b of the image sensor 2
A part of the spacer 24 is fixedly attached to the cover by a double-sided tape or the like. Further, one end of the spacer 24 is detachably attached to the middle case 98, and the spacer 24 serves as a support member for the upper main body A of the image sensor 2. With such a structure, even if the image sensor 2 is broken due to an accident, the image sensor 2 and the spacer 24, which is a supporting member, can be separated by a structure that allows the upper main body A and the lower main body B to be easily separated from each other. If it is configured as one unit, it can be easily replaced.

Further, the end portion 24d of the spacer 24 has a thickness in the range of about 0.05 mm to 0.2 mm.
It is appropriately set according to the thickness, rigidity and the like. As described above, the image sensor 2 has the spacer 24 with respect to the upper body A.
It is held by the elasticity of. Therefore, the elastic force of the spacer 24, the inertial force of the image sensor 2, and the elastic force of the white plate 25 interact with each other to move to the equilibrium state. Since a space is provided around the image sensor 2 so that it can be moved only in a necessary movement range, unnecessary movement is restricted, and in the original readable range of the sensor, the original plate thickness direction (the direction perpendicular to the original surface) is obtained. It is movable. In addition, the range of the fixed portion between the glass portion 2b and the spacer 24 is the end portion 24d.
To about 5 mm. Especially the end 24d
Even if the vicinity is not in close contact with the glass 2b, or even if it floats with an inclination from the vicinity of the fixed range boundary part, the spacer 24 of the spacer 24 is contacted by the urging force due to the interaction so that the end part 24d contacts the glass 2b. It suffices to set the thickness and rigidity.

With such a structure, the white plate 25 and the glass portion 2b are prevented from interfering with each other, and the original 16 having the thinness and the rigidity such that it is deformed by the acting force due to the interaction can be obtained by placing the original 16 on the white plate 25. The sub-scanning operation is performed along the line. As a result, the reflection angle (β °) of the light reflected by the white plate 25 and the reflection angle of the light reflected by the original 16 become equal, and the compatibility with the adjusted sensitivity of the adjusted image sensor 2 is increased, It is possible to obtain stable imaging data.

Further, in the case of a document having a thickness and rigidity that are not deformed by the acting force due to the interaction, the image sensor 2 is moved upward in the figure as shown in FIG.
The white plate 25 is also sub-scanned along the document 16.
Thereby, the reflection angle (β °) of the light reflected by the white plate 25 and the reflection angle of the light reflected by the original 16 are kept equal, and the compatibility with the adjusted sensitivity of the adjusted image sensor 2 is enhanced. Therefore, stable imaging data can be obtained.

The image sensor 2 which is an integrated optical system in which the reading means, the illuminating means and the light transmitting member are integrated as described above.
And a spacer 24 that is a supporting member of the image sensor 2.
The white plate 25, which is a plate-like elastic member as well as the back illuminating means, keeps the optical relationship with the imaged document constant, and adjusts the behavior of various imaged documents with respect to the casing of the upper main body A. Original equalize (equalize), which is structured so that it can be moved integrally with the original and moves in accordance with the original.
By providing the means, stable imaging data can be obtained. In addition, since a wedge-shaped gap is formed between the glass portion 2b and the white plate 25, the original 16 is printed as shown in FIG.
When it is conveyed from the right side (upstream) to the left side (downstream), it passes through this wedge-shaped gap.

Further, since the spacer 24 is arranged on the upstream side of the sub-scanning, when the document 16 is conveyed, the spacer 24 first moves the spacer 24 at the center of the optical path shown by the one-dot chain line in FIG. It is in sliding contact with the original. Therefore, contact, sliding, and friction between the original 16 and the glass portion 2b are prevented. Furthermore, a light transmitting member such as glass is generally rubbed in order to emphasize optical performance,
It is often difficult to improve slidability. On the other hand, by covering the contact surface of the light-transmitting member such as glass which is in sliding contact with the document with the spacer 24, the contact area between the light-transmitting member such as glass and the document is reduced. And the spacer 24
Can be made of a member having a low friction coefficient, which is superior in slidability to a light-transmitting member such as glass, and the load of document conveyance can be reduced.

As described above, in the original image pickup apparatus 1 according to the embodiment of the present invention, for each of the rollers 20 to 23 for conveying and driving an original, one drive motor 100 is used as a drive source, and the forward / reverse rotation and the rotation speed of the drive motor 100. Is controlled. As a result, a series of document driving operations such as separation and feeding of documents, sub-scanning, and discharge are performed, so that energy saving and downsizing of the apparatus can be achieved.

Further, in the original image pickup device 1, the rotational speed of the drive motor 100 is controlled to be different for each operation of separating and feeding an original, sub-scanning, and discharging. For example, by setting the rotation speed of the drive motor 100 at the time of ejecting the document faster than that at the time of sub-scanning the document, the document can be quickly ejected after the sub-scanning is performed at a required feeding speed.
Further, in the document imaging apparatus 1, since the rotation direction and the rotation speed of the drive motor 100 are different between the document separating and feeding operation and the document sub-scanning, the document is rapidly separated and fed by one driving source. After the feeding, the sub-scanning can be performed at the required feeding speed.

Further, in the original image pickup apparatus 1, when the original separating / feeding operation is changed to the sub-scanning operation as described above, the driving force after the rotation direction of the drive motor 100 is reversed is set to the sub-scanning driving means. Main roller 22 and discharge roller 2
3 is transmitted in advance. Then, the driving force of the main roller 22 is transmitted to the feeding roller 20 via the connecting roller 26, and assists the document to bite into the wedge-shaped space between the main roller 22 and the auxiliary roller 65. During sub-scanning with the main roller 22, the peripheral speed of the main roller 22 and the peripheral speed of the feeding roller 20 are synchronized, the document grip surface can be increased, and the sub-scanning operation can be reliably performed. After the main roller 22 starts to rotate, it is transmitted to the separating roller 21 and the feeding roller 20 which are the separating and feeding means, and one driving motor 100 and this driving motor 100.
Each roller 20 only by the drive force transmission mechanism for transmitting the drive force of
It is possible to control the drive timings of 23 to 23. Therefore, although the mechanism is simple, the operation of conveying the document is smoothly performed.

Further, in the original image pickup device 1, as described above, the driving force of the drive motor 100 is changed from the output shaft to the gear trains 101, 102, 113, 114 and the gear trains 101, 1.
02, 103, 108, 111, 113, 114 and a transmission belt 53 which is a timing belt with teeth. Thus, the rollers 20 to 23 can reliably transmit the driving force of the drive motor 100 by the simple mechanism, and at the time of conversion of the drive motor 100 between the forward and reverse directions, the separation roller 21 and the feeding roller 20 which are the separation and feeding means, It is possible to shift the drive timings of the main roller 22 and the discharge roller 23, which are sub-scanning driving means.

Next, the structure of the document trays 18 and 118 will be described. 14 and 15 are plan views for explaining the opening / closing operation of the document trays 18, 118 which are the document guide means incorporated in the lower main body B of the present embodiment. 14A and 15A are top views and FIG.
15B and FIG. 15B are bottom views. And in FIG.
Shows the storage state of the document trays 18 and 118, and FIG. 15 shows the state when the document trays 18 and 118 of this embodiment are in use. As shown in these drawings, the document trays 18, 118
Have a substantially fan-shaped outer shape in plan view.
The auxiliary roller base 39 and the lower case 99 are rotatable about b and 118b.

The original tray 18 is a support shaft portion 18 having a substantially cylindrical shape.
b and a hole portion 18a coaxial with the support shaft portion 18b are provided as rotation centers. The lower hole 18a is rotatably fitted into a dowel (not shown) provided in the lower case 99. Then, the support shaft portion 18b becomes the auxiliary roller base 3
It is rotatably supported by the lower main body B by being rotatably fitted in the hole provided in the member 9. Similarly, the tray 118 has a substantially cylindrical support shaft portion 118b.
And a hole 118a coaxial with the support shaft 118b as a center of rotation. The lower hole 118a is rotatably fitted into a dowel (not shown) provided in the lower case 99. The support shaft portion 118b is rotatably fitted into the hole portion provided in the auxiliary roller base 39, so that the support shaft portion 118b is rotatably supported with respect to the lower main body B.

As shown in FIGS. 14 (b) and 15 (b), the arcuate side surfaces of the document trays 18 and 118 are rack portions 18r and 11 having gear teeth, respectively.
It is 8r. Then, these two document trays 1
Reference numerals 8 and 118 denote the lower main body B via two meshing gears 60 and 60 'which mesh with the gear teeth of the rack portions 18r and 118r.
It is designed to rotate in conjunction with each other. The meshing gears 60 and 60 'are in mesh with each other. In addition, it is rotatably supported by the shaft attached to the lower case 99 and the hole of the tray, and the shaft attached to the tray and the hole attached to the auxiliary roller base 39.

FIG. 16 is a side sectional view for explaining the tray shift mechanism of the tray 18. The storage state (first position) of the tray 18 in FIG. 14 is virtually represented by a chain double-dashed line in the side view of FIG. In the state in which the tray 18 is indicated by the chain double-dashed line, the right slope of the protruding portion 18e of the tray 18 is in a state of hanging on the left end of the top of the protruding portion of the lower case 99, and the force to push the tray 18 to the left acts. There is. That is, in FIG.
A biasing force is exerted to rotate the tray 8b rightward, and the tray is biased in the direction opposite to the rotation in the state direction for setting the document. This prevents the tray 18 in the stored state from being opened accidentally when the apparatus body is transported.

In the operation of the tray 18 in which the tray 18 shown in FIG. 16 shifts from the state shown by the chain double-dashed line to the state shown by the solid line, the protruding portion 18d of the tray 18 rides on the protruding portion 99d of the lower case 99. , The protruding portion 18c at the same time
Moves while expanding the end portion 39c of the auxiliary roller base, and the tray 18 shifts to the solid line state. And FIG.
5A and 5B, the return of the tray 18 in the closing (storing) direction is regulated, and at the same time, the protruding portion 18c
The apex portion of the edge portion of the end portion 39c projects more than the edge portion of the end surface of the end portion 39c. At this time, the edge portion of the end face of the end portion 39c is the protrusion 1
It is in a state of climbing up near the foot of the slope to the left of the apex of 8c. As a result, the edge portion of the end surface of the end portion 39c acts to push the tray 18 to the right. That is, in FIG. 15, the tray 18 is attached to the shaft 18b.
There is a biasing force trying to turn left around
The tray is biased in the direction opposite to the rotation in the tray storage direction.

This means that the tray 18c is prevented from being closed carelessly, and at the same time, the projection 18c has a rail shape for guiding the original, so that the front end of the original is inserted from the left to the right on the rail. Since it is possible to smoothly shift from the position where the rail is discontinued to the slope provided at the end 39c of the auxiliary roller base 39, the leading edge of the original at the time of setting the original can be prevented. Further, as shown in FIG. 14, the tray 118, which is set symmetrically with the tray 18, is also set similarly to the tray 18.

When the original trays 18 and 118 are housed in the lower main body B, the original trays 18 and 118 become a part of the apparatus main body C as shown in FIG. Become. As a result, in the document transport path,
It is possible to prevent foreign matter such as dust that impedes driving and conveyance of the document from entering, and to prevent damage to each mechanism inside the apparatus main body C. In addition, each document tray 18,
Since 118 is housed in the apparatus main body C, the occupied area and volume of the entire apparatus can be reduced when the original image pickup apparatus 1 is not used, and the apparatus can be easily carried.

Further, as shown in FIG. 16, in the present embodiment, the operation button 75 is made of a member capable of transmitting an operation signal by infrared rays of the remote control switch 79. A substantially conical reflecting mirror 76 capable of reflecting light and infrared rays is attached to the inner upper surface of the operation button 75. Further, at a position on the main control board 31 facing the reflecting mirror 76, a light receiving element 77 that receives an operation signal by infrared rays of the remote control switch 79 and photoelectrically converts it is provided on the main control board 3.
It is mounted on 1.

Next, FIGS. 17, 18 and 19 to 25.
With reference to, the configuration and opening / detachment of the upper main body A and the lower main body B constituting the apparatus main body C will be described. FIG. 17
18 is an external perspective view of a lower main body B incorporating a drive assist mechanism and an original tray, FIG. 18 is an external perspective view of an original drive unit U1 that constitutes the upper main body A, and FIG. 19 is a control board that constitutes the upper main body A. 20 is an external perspective view of the unit U2, and FIG. 20 is an external perspective view of the operation button unit U3 constituting the upper main body A.

FIG. 21 is a left side view showing the open state of the document passage due to the connection between the upper body A and the lower body B. FIG. 22 shows the open state of the document passage due to the connection between the upper body A and the lower body B. It is a right view shown. 23, 24 and 2
5A and 5B are respectively a trihedral view (a) and a perspective view (b) in the second, third and fourth embodiments showing the method of fitting the hinge shaft 119a.

In FIG. 17, the main auxiliary roller 65,
Discharge auxiliary roller 66, auxiliary roller spring 37, primary separation pad 61, secondary separation pad 62, secondary separation lever 63,
Auxiliary drive mechanism such as the separation lever spring 64 and the white plate 25
And the auxiliary roller base 39 incorporating them are the document trays 18, 118 assembled in the lower case 99 and the meshing gears 60, 60 'for interlocking the document trays 18, 118.
Is integrally attached to the lower case 99 by a fastening means such as a screw to form a lower main body B.

The feeding roller 20, the separating roller 21, the main roller 22, the discharging roller 23 and the motor 10 shown in FIG.
0, a document driving mechanism such as a gear base plate 119, a reading unit such as the image sensor 2, and a document driving unit U1 in which the decorative plate 120 and the like are integrally configured by fastening means such as screws,
The control board unit U2 shown in FIG. 19 and the operation button unit U3 shown in FIG.

The control board unit U2 is fixed to the document driving unit U1 by fastening means such as screws. The operation button unit U3 has an upper cover 97 as shown in FIG.
The hook claws 97a, b, c, d made of an elastic member integrally provided with the key engaging portions 98a, b, c, d integrally provided on the inner cover 98, respectively. Locked by. And hook claw 9
7a, 7b, 7c, 7d, 7c, 7d, 7c, 7d, 7c, 7d, 7c, 7d, 7c, 7d, 7c, 7d, 7c, 7d, 7c, 7d, 7c, 7d, 7c, 7d, 7c, 7d, 7c, 7d, 7c, 7d, 7c, 7d, 7c, 7d, 7c, 7d, 7c, 7d, 7c, 7d, 7c, 7d, 7c, 7d, 7c, 7d, 7d, 7c, 7d, 7d, 7d, 7d, 7d, 7d, 7d, 7d, 7d, 7d.

In FIG. 21, the hinge shaft 119a provided on the gear base plate 119, which is a constituent member of the upper main body A, by an integral means such as caulking of a dowel is a lower case 99 which constitutes the lower main body B. Is inserted into the U-shaped groove 99a provided in the direction from the opening direction of the U-shaped groove 99u. Then, the shaft slip-off preventing member 82 is attached so as to be pivotally connected. Similarly, the decorative plate 120, which is a constituent member of the upper main body A shown in FIG. 22, is provided with a hinge shaft 120a having a shaft such as a dowel provided by an integrated means such as caulking, and an auxiliary member that constitutes the lower main body B. It is inserted into a U-shaped groove 39u provided on the roller base 39 from the opening direction of the U-shaped groove 39u, and is pivotally connected by attaching a shaft slip-off preventing member 82 '. Further, the opening direction (longitudinal direction) of the U-shaped grooves 99a and 39a is set to be the vertical direction with respect to the document surface.

The hinge shafts 119a and 120a are set substantially coaxially, and the above-mentioned fitting relationship allows the upper body A and the lower body B to rotate about the shafts 119a and 120a and change their relative positions. Has become. Also, the upper body A
The gear base plate 119 and the decorative plate 120 are integrally assembled, and the hinge shaft 11 provided integrally with the upper main body A is
Although 9a and 120a are naturally set to be substantially coaxial, they may be made non-coaxial as a method of applying a load to the rotation.

Further, as shown in FIGS. 21 and 22, the upper body A has hooks 80, which are hook-shaped elastic members,
80 'is integrally provided. The lower body B has key-like fitting portions 39f and 39f 'which are engaged with the hooks 80 and 80'.
Are integrally provided. By engaging the hooks 80 and 80 'with the key-like fitting portions 39f and 39f',
The amount by which the relative position changes is regulated.

The upper body A or the lower body B has a long hole / U
It can be rotated by a hinge bearing portion such as a V-shaped groove or a V-shaped groove, or by a combination of a hinge shaft fitted with the hinge bearing and a retaining means for preventing the hinge shaft from coming off after the hinge shaft is inserted into the hinge bearing. Provide a connecting part. Further, a key-like fitting portion such as a hook is provided, and the key-like fitting portion such as the hook has elasticity, and the acting direction of the elastic force is set to be a radial direction centered on the hinge axis. By connecting the upper body A and the lower body B, the bearing portion may be set on the upper body A side and the shaft portion may be set on the lower body B side.

With the above-described structure, the upper body A has the structure shown in FIG.
In the posture shown in FIG. 1, the hinge shaft is inserted into the U groove of the lower main body B from above. Then, the hook 80, which is integrally attached to the upper main body A, is rotated around the hinge axis in the direction of the arrow (clockwise rotation), and the hook 80 is integrally fitted to the lower main body B. It is assembled by engaging with the joint portion 39f. The shaft slip-off preventing member 82 may be assembled immediately after the insertion of the hinge shaft or after the hook engagement.

Further, the hinge shaft of the upper main body A is inserted into the U groove of the lower main body B from above in the posture shown in FIG. Then, the hook 80 ′ integrally attached to the upper main body A is rotated around the hinge shaft in the arrow direction (left turn).
Is a hook 80 'integrally attached to the lower body B.
It is assembled by being engaged with the key-like fitting portion 39f '. The shaft slip-off preventing member 82 'may be assembled immediately after the insertion of the hinge shaft or after the hook engagement.

In the case of the U-shaped groove bearing structure, as a method for preventing the shaft from coming off, the members 82 and 82 'shown in FIG. 21 are used.
May be attached with a fastening member such as a screw to seal the opening of the U-shaped groove. In addition, as a second embodiment of the hinge bearing, a sealing member as shown in FIGS.
Shaft slip-out prevention hook 83 with elastic hook meshing part
It is also possible to provide a method in which the sealing member and the U-shaped grooved member are provided with a key-like fitting portion for meshing with the hook, and the sealing member is attached without using another fastening member.

Further, as shown in FIG. 24A, as a third embodiment of the hinge bearing, without separately providing a sealing member.
The shaft 119a may be sealed by forming the bearing portion into an elongated hole as shown in (b) and pushing it between two plate-shaped components.

Further, in the above shaft supporting method, it takes time to attach and detach the shaft. Therefore, as a fourth embodiment of the hinge bearing, as shown in FIGS. 25 (a) and 25 (b), after inserting the hinge shaft, the hinge shaft is inserted. It may be rotated around the shaft (turned to the right) to prevent the hinge shaft from coming off in the insertion direction. In this case, the device main body A and the device main body C can be easily separated by removing the hook 80 and turning it to the left. In any case, it depends on the design space factor and should be appropriately selected.

In the use state, the space in the document thickness direction of the document passage formed between the upper main body A and the lower main body B has a minimum space of the casings of the upper main body A and the lower main body B (or each of them). It is secured by a mating surface of a member integrally attached to). On the other hand, the maximum space is U-shaped groove 99
It is regulated by the fitting play between the longitudinal direction of u and the hinge shaft 119a and the mesh play between the hook 80 and the key-like meshing portion 39f for the hook 80.

For example, in the hinge shaft portion, the shaft slip-off prevention member 82 and the lower body B are fastened to each other at the fastening portion of the shaft slip-off prevention member 82.
A spacer is bitten between and, and a play with the hinge shaft 119a is set in the longitudinal direction of the U-shaped groove. Further, in the hook 80 portion, a spacer is engaged between the hook 80 and the upper main body A at the fastening portion of the hook 80 to set the engagement backlash of the hook. The direction of play in the longitudinal direction of the U-shaped groove or slot and the direction of play of hook engagement are set to be substantially perpendicular to the document surface, and the amount of play in the sub-scanning direction of document reading is minimized. To be set. If the thickness of the document is in the range of about 0.05 to 0.25 mm, it is possible to deal with a fixed space between the casings. The space between the upper body A and the lower body B in the thickness direction of the document is adjusted so that a photographic document having a thickness greater than the above and having high rigidity or a document such as a cardboard having a thickness of about 0.5 mm can be handled. It has a possible structure.

Further, as described above, the upper main body A and the lower main body B are easily bisected at the original passage. The connecting portion of the upper body A and the lower body B divided into two parts is prevented from being separated by the shaft fitting portion and the hook engagement portion. As a result, the upper body A and the lower body B can be easily attached and detached, and maintenance such as cleaning dirt on the document passage and replacing the sensor is facilitated.

Further, when an original having an unspecified thickness is inserted and conveyed, the space between the upper body A and the lower main body B in the thickness direction of the original can be adjusted according to the thickness. As a result, the relative position between the upper body A and the lower body B changes,
A document with a thickness outside the setting range can be inserted and conveyed, and the operator of the apparatus body can tolerate mishandling.

On the other hand, the connecting portion suppresses the separation and is released by the shaft fitting portion and the hook meshing portion as in the fourth embodiment of the hinge bearing described above. As a result, the hook meshing portion can be released for separation, which facilitates disassembly, sensor replacement, and maintenance.

FIG. 26 is a flow chart showing a processing procedure after the document image pickup apparatus 1 in the present embodiment is started. First, the CPU 11 initializes internal variables and each mechanism described above (steps S1 to S6), and then waits for an instruction of the operation method designating switch 14 including the remote controller 79 and the document set detector 19. A loop process is entered (steps S7 to S12).

That is, when the original image pickup apparatus 1 is started, the CP
U11 initializes the first buffer memory 6 and the second buffer memory 7 (steps S1 and S2),
After resetting the redisplay counter and the redisplay pointer inside the CPU 11 to 0 (steps S3 and S4) and initializing the display memory 8 (step S5), FIG.
After the document discharge process (step S6) described later in 8,
A loop process of steps S7 to S12 is entered.

The redisplay counter in step S3 is
This is a variable indicating the number of document information stored in the second buffer memory 7. Further, the redisplay pointer in step S4 is a variable indicating which document information among the document information stored in the second buffer memory 7 is transferred to the display memory 8. When the redisplay pointer is 0, it indicates that it is the document information that was read last, and as it increases by 1, it indicates that it is the information of the older document in order.

The display memory 8 in step S5
When initializing, the CPU 11 can confirm the connection between the original image pickup device 1 and the display device 15 and the operation of the original image pickup device 1 instead of the data of the entire black and the entire white. In addition, data that can be adjusted such as screen size and image quality
Initialization is performed by reading from the OM 12 or using data calculated by the CPU 11 itself.

Next, the CPU 11 monitors the output signals of the remote controller 79 and the document set detector 19. And CP
U11 is a new document display, rotation display,
It is determined that the original set detector 19 has detected that there is no operation instruction such as redisplay (step S7, step S8, step S9) and that the originals are set on the original trays 18 and 118 in the determination of step S10. If yes, the capacity of the first buffer memory 6 is confirmed (step S11). Then, the first buffer memory 6
The documents are continuously read (step S12) until there is no empty space or the document stack 17 stored in the document tray 18 is exhausted.

On the other hand, when the button of the remote controller 79 is pressed during this loop processing and an operation instruction such as new document display (step S7), rotation display (step S8), redisplay (step S9), etc. is made, According to the content of the instruction, the CPU displays a new document (step S7 ') described later with reference to FIGS. 29 and 30, a rotated display (step S8') described later with reference to FIG. S
Control of each process such as 9 ') is performed.

The new original display means the original tray 18
This is a process for newly reading the upper document and displaying it on the display device 15. The rotation display is a process for rotating and displaying the document image being displayed on the display device 15 at a predetermined angle. The redisplay is a process for displaying the document image that has been displayed before on the display device 15 again.

In the present embodiment, the original set detector 19 is used to set the original bundle 17 stored on the original tray 18.
Is detected (step S10). And step S1
When it is determined in 1 that the first buffer memory 6 has a free space, the process moves to step S12 and the reading of the document stack 17 is immediately started. Not limited to this,
For example, when an instruction to display a new document is given from the remote controller 79 (step S7), the document stack 1 stored on the document tray 18 without performing the determination in step S11.
The continuous reading of 7 may be started.

FIG. 27 is a subroutine of step S12 of FIG. 26, and is a flow chart showing the processing procedure of document feeding and image reading. Here, the CPU 11
First, the light source lamp 24 is turned on (step S2).
1). Separation feeding roller 20 and separation roller 21
The drive motor 100 is controlled to be driven (step S22). This allows the document tray 18
One original 16 'out of the original bundle 17 stored in is separated and fed. Next, the CPU 11 causes the document position detector 3
Is monitored (step S23), and the rotation of the drive motor 100 is continued until the timing when the original 16 'reaches the original position detector 3 as a reference (step S24). ).

Then, at the timing when the original 16 'reaches the main roller 22, the CPU 11 drives the drive motor 1
Control for switching the rotation of 00 to the sub-scanning direction (reverse rotation direction) is performed (step S25). As a result, the feeding roller 2
0 and the separation roller 21 stop driving, and the sub-scanning main roller 22 and discharge roller 23 start driving.

Next, when the original document 16 '(16) reaches the original readable position on the white plate 25 (step S26), the CPU 11 moves the A / D converter 5 to the first buffer memory 6. Data transfer is started (step S27). When it is determined in the subsequent step S28 that the data for one original has been transferred, the data transfer to the first buffer memory 6 is terminated (step S2
9), the light source unit 2c is turned off (step S30). Then, the document discharge process (step S31) described later with reference to FIG.
Each control of.

Here, the operation of reading the original image will be described in detail with reference to FIGS. Manuscript 16 '
When (16) reaches the readable position on the white plate 25, the light emitted from the light source unit 2c is reflected on the surface of the original 16 in the case of a non-transparent original such as paper according to the image information of the original 16. 16 in the case of transparent originals such as sheets for OHP and OHP
11 and the surface of the white plate 25, respectively.
It is read by the sensor unit 2a of the linear image sensor 2 as shown in FIG.

At this time, the CPU 11 detects the timing when the document 16 deviates from the readable position on the white plate 25 by converting it from the timing when the rear end of the document 16 passes the document position detector 3, and reads the document 16. Recognize that is finished. The image information of the original 16 read by the linear image sensor 2 is converted into digital data by the A / D converter 5, and gradation conversion is performed by the CPU 11 as necessary.
Image processing such as edge enhancement is performed, and the image is stored in the first buffer memory 6.

FIG. 28 shows steps S6 and FIG.
7 is a flowchart showing a subroutine of step S31 of 7, that is, a document ejection processing procedure of the document imaging apparatus 1. In the document discharge processing, the CPU 11 first controls the drive motor 100 to rotate in the sub-scanning direction so as to drive the main roller 22 and the discharge roller 23 for the sub-scanning (step S51). Then, the output of the document position detector 3 is monitored (step S52). While the document position detector 3 is detecting the document 16, assuming that the trailing edge of the document 16 has not passed the position of the document position detector 3, the trailing edge of the document 16 moves the document position detector 3. Wait until it passes. Then, the CPU 11 uses the timing at which the rear end of the document 16 passes the document position detector 3 due to a change in the output of the document position detector 3 as a reference until the document 16 is surely removed from the discharge roller 23. Drive control is performed (step S53), and the drive motor 100 is stopped when the drive motor 100 is removed from the discharge roller 23 (step S54).

When the document position detector 3 cannot detect the document 16 in the determination of step S52 (step S52), the CPU 11 determines that the trailing edge of the document 16 has just passed the document position detector 3. I assume. The drive motor 100 is driven until the document 16 is reliably removed from the discharge roller 23 (step S53) in terms of this timing (step S53), and control is performed so that the drive motor 100 is stopped when the document 16 is removed (step S54).

29 and 30 show step S in FIG.
7 is a flowchart showing a subroutine of 7 ', that is, a processing procedure of new display of a document of the document imaging apparatus 1. In this process, the CPU 11 first confirms whether or not data is stored in the first buffer memory 6 (step S41). If there is data, the data in the first buffer memory 6 is read, the data is processed, and the second data is processed.
Data is transferred to the buffer memory 7 (step S4)
4). On the other hand, when there is no data in the first buffer memory 6, the CPU 11 confirms whether or not there is a document stored in the document tray 18 based on the output signal of the document set detector 19 (step S42). ). In some cases, the document reading operation described in steps S21 to S31 of FIG. 28 is performed (step S43), and the data newly stored in the first buffer memory 6 is used to make the second buffer memory 7 Data is set to (step S44). On the other hand, when the CPU determines in step S42 that there is no document bundle 17 stored in the document tray 18, the CPU ignores the new document display instruction without performing the process of step S44.

Next, referring to the flowchart of FIG. 30,
A processing procedure of data transfer to the second buffer memory 7 and data transfer to the display memory 8 as a subroutine of step S44 of FIG. 29 will be described. CPU11 is the second
It is confirmed whether or not the buffer memory 7 has a free capacity for data transfer (step S61). If there is no free space and it is full, the oldest data in the second buffer memory 7 is deleted from the second buffer memory 7 (step S68), and the redisplay counter is decremented (step S69). Again, step S6 of checking whether or not there is free space in the second buffer memory 7.
Return to processing of 1. This is because even if the data in the second buffer memory 7 is subjected to data processing such as compression, even if the data that has been subjected to data processing such as compression for one sheet is deleted, another 1
This is because it is unknown whether the data for one sheet can be stored.

The CPU 11 goes through the loop process of steps S61 to S68 to S69
When the free space is secured in the buffer memory 7 of the CPU, the redisplay pointer and the rotation counter in the CPU 11 are set to 0.
Is reset to (step S62, step S63).
Here, in the rotation counter, the image in the display memory 8 is the second
Is a variable that indicates how many times the original data in the buffer memory 7 is rotated. When the value of the rotation counter is n, it indicates that 90 ° × n rotations are performed, and n is an integer of 0 to 3. Take a number. Therefore, steps S62 and S6
By performing the respective processes of 3, the display memory 8
The image data transferred in the second buffer memory 7
It is the newest data in, and it shows that it is not rotated and has the same orientation as the original data.

Subsequently, the CPU 11 performs image processing such as resolution conversion, gradation conversion, edge enhancement, etc. on the oldest data stored in the first buffer memory 6 as necessary, and then the display memory 8 To (step S
64). Next, the CPU 11 performs data processing such as compression on the oldest data in the first buffer memory 6 and then transfers the data to an empty area of the second buffer memory 7 (step S65). Then, the redisplay counter is incremented (step S66), and the oldest data in the first buffer memory 6 is deleted from the first buffer memory 6 (step S67).

Note that the reason why the data in the first buffer memory 6 is transferred to the display memory 8 instead of the second buffer memory 7 in step S64 is that the data is transferred from the second buffer memory 7 to the display memory 8. In this case, it is necessary to perform data processing such as decompression on the data that has been subjected to data processing such as compression, so that unnecessary data processing such as decompression is not performed.

The data transferred to the display memory 8 is converted into a video signal by the video signal generator 9 and sequentially supplied to the display device 15 via the display device connecting connector 32. By the operation, the image of the document is displayed on the panel or the like. As the video signal generated by the video signal generator 9, an analog RGB signal used in a personal computer is used in this embodiment. As long as it can be directly connected to the display device 15, can notify the display device 15 of a change in the data of the display memory 8 in real time, and can be reflected in the display content of the display device 15, for example, a DFP (Digital Flat Panel Sta.
ndard) or a method of transmitting with a digital signal as defined by IEEE 1394.

FIG. 31 is a flow chart showing the processing procedure of the subroutine of step S8 'of FIG. 26, that is, the rotation display of the document screen being displayed by the document imaging apparatus 1. In this process, the CPU 11 first confirms whether the value of the redisplay counter is 0 (step S71).
When the value of the redisplay counter is 0, it means that there is no data in the second buffer memory 7 and the original read data is not displayed yet. In this case CP
U11 ignores the rotation display instruction without performing the processing of steps S71 to S80.

When the value of the redisplay counter is other than 0, there is data in the second buffer memory 7, so CP
U11 increments the rotation counter and then calculates modulo 4 (MOD4) (step S72),
Find the value of the rotation counter for the angle to rotate this time. By performing this modulo operation, the instruction of 360 ° becomes 0 °
You can return to the instructions.

Subsequently, the CPU 11 reads the data indicated by the redisplay pointer from the data in the second buffer memory 7 (step S73), and performs data processing such as decompression on the read data (step S7).
4). Then, the value of the rotation counter is confirmed (steps S75 and S76), and rotation conversion is performed according to the value of the rotation counter (steps S77 and S7).
8, step S79), and after performing image processing such as resolution conversion, gradation conversion, edge enhancement, etc., if necessary, transfer to the display memory 8 (step S80). As a result, the image of the document displayed by the display device 15 is rotated and displayed on the panel or the like.

FIG. 32 is a flow chart showing the subroutine of step S8 'of FIG. 26, that is, the processing procedure for redisplaying the displayed document. CPU1 in this process
First, it checks whether the value of the redisplay counter is 1 or less (step S81). When the value of the redisplay counter is 1 or less, there is no data in the second buffer memory 7 (in the case of 0) or only one sheet (in the case of 1), and the original reading data is not displayed yet. This indicates that the second buffer memory 7 stores only the data that is not displayed or that is currently transferred to the display memory 8 and is being displayed. In this case, the CPU 11 ignores the redisplay instruction from the remote control switch 79 without performing the processing in steps S82 to S86 below.

When the value of the redisplay counter is 2 or more, the CPU 11 increments the redisplay pointer, and then modulos the value of the redisplay counter (step S82). The value of the rotation counter of the data in the second buffer memory 7 to be displayed this time is calculated. By performing this modulo operation, it is possible to set the redisplay order of the oldest data next to the newest data.

Subsequently, the CPU 11 resets the value of the rotation counter to 0 (step S83), and reads the data in the second buffer memory 7 (step S84). Of these data, data processing such as expansion of data indicated by the redisplay pointer is performed (step S85), and image processing such as resolution conversion, gradation conversion and edge enhancement is performed as necessary, and the result is transferred to the display memory 8 ( Step S86).

As described above, in the document imaging apparatus 1 of the embodiment, the linear image sensor 2 is used as the image reading means, the image of the document is read by the linear image sensor 2, and the read data is stored in the first buffer memory 6. The processing up to the transfer and the processing for outputting the data in the display memory 8 from the video signal generator 9 are performed independently. As a result, when the display device 15 has a high image quality, the display device 15 has a sufficient resolution for reading and outputting characters such as a document original while making good use of its characteristics, and in the explanation of the display screen displayed by the display device 15, the next document is displayed. Can be read. Further, a compact and inexpensive original image pickup device capable of handling a large number of originals at a time can be realized, in which display switching time is short, further, preparation for display is unnecessary.

In the above-described embodiment, as shown in FIG. 3, the original image pickup device 1 is constructed as an independent separate device which is used by being connected to the display device 15. The display device 1 is not limited to this.
The original image pickup device 1 may be built in the housing 5 as a subunit to form an integrated original image pickup display device.

Note that the program code itself for operating various devices and means for supplying the program code to the CPU 11 so as to realize the functions of the original image pickup apparatus 1 described in each of the embodiments, for example, The storage medium storing the program code is stored in the CPU
The external storage means 11 may be provided.

In order to realize the original image pickup method described in each of the embodiments, for example, step S in FIG.
Each processing of 1 to step S12, step S21 of FIG.
-Each process of step S31, step S51 of FIG.
Each process of step S54, each process of step S41 to step S44 of FIG. 29, each process of step S61 to step S69 of FIG. 30, each process of step S71 to step S80 of FIG. 31, step S81 to step S86 of FIG. The program code itself for causing the CPU 11 to execute each process of
It may be configured such that a means for supplying the program code, for example, a storage medium storing such a program code is separately provided as an external storage means of the CPU 11.

When the external storage means of the CPU 11 is provided as described above, the program code stored in the storage medium is read out by using a predetermined storage / reproduction device, and the CP
The CPU 11 operates by being supplied to U11. Examples of storage media for storing such program codes include flexible disks, hard disks, optical disks, magneto-optical disks, CD-ROMs,
A magnetic tape, a non-volatile memory card, a ROM or the like can be used.

In addition, the supplied program code is CP
By executing the U11, not only each function of the embodiment is realized, but also its program code is executed by the CPU1.
Each function of the embodiment may be realized in cooperation with the OS (operating system) operating in No. 1 or another program. Further, after the supplied program code is stored in the memory provided in the function expansion board of the image pickup apparatus or the function expansion unit connected to the image pickup apparatus, the CPU 11 executes one of the actual processes based on the instruction of the program code. It may be configured such that all or a part of the functions are performed and the functions of the embodiments are realized by the processing.

Further, the linear output device has an output means for outputting image information, and the relative position of the linear output device and the output medium (copy paper or the like) in the direction orthogonal to the main scanning direction of the linear output device. Scanning means for changing the speed at a predetermined speed, a medium guide means for setting the output medium at a predetermined position, a locking means for holding the medium guide means in a stored state, and a medium guide means for moving the medium guide means to a predetermined position. It is easy to apply to an output device such as an image scanner having a moving holding means for holding the locking means, a releasing means for releasing the locking means, and a receiving means for receiving the infrared remote control signal.

Further, the linear output device has an output means for outputting image information, and the relative position of the linear output device and the output medium is set at a predetermined speed in a direction orthogonal to the main scanning direction of the linear output device. Sub-scanning means for changing, two medium guiding means for setting the output medium at a predetermined position, interlocking means for interlocking the two medium guiding means, and locking means for holding the medium guiding means in a stored state. An output of a printer or the like having a moving holding means for moving and holding the medium guiding means to a prescribed position, a releasing means for releasing the locking means, and a receiving means for receiving an infrared remote control signal It is easy to apply to the device.

As described above, according to the present embodiment, the image information of a document is displayed on the display device 15, and while the document is being described, the image information of the next document is fetched in the buffer memory. Therefore, it is possible to provide a document image pickup device that can switch screens at high speed while using the linear image sensor.

Further, even when the image information of the displayed original is redisplayed on the display device 15, the screen can be switched at high speed without reloading, and the same image such as rotation can be repeatedly converted. Even when processing is performed, it is possible to provide a high-quality original image pickup device that does not cause an increase in image deterioration due to repetition.

Further, it is possible to provide an original image pickup apparatus capable of setting a large number of originals at one time and reading and displaying them continuously even with a small buffer memory capacity. Further, it is possible to provide a high-speed original image pickup device which can store information of a large number of originals even with a small buffer memory capacity and has a low probability of having to be read again.

Further, according to the original image pickup apparatus 1 of the embodiment, a person other than the instructor who exclusively transfers documents is not required, and the instructor of the presentation can easily perform the operation at any timing. To switch the display screen to
Since conversion can be performed, a smooth and more effective presentation can be performed without disturbing the flow of explanation. Further, according to the original image pickup apparatus 1, since separate mechanisms are driven by one power source, it is possible to provide a small-sized, lightweight and inexpensive original image pickup apparatus.

[0188]

As described above, according to the present invention, the original can be reliably separated and fed, the sub-scan can be performed stably, and the space saving and the cost reduction in the optical system for illuminating the original and capturing the image can be achieved. It is possible to provide a document image pickup device with high dimming accuracy and a beautiful captured image while achieving the above.

[Brief description of drawings]

FIG. 1 is an external perspective view showing an outline of an image display system configured by using a document imaging device to which the present invention is applied.

FIG. 2 is a diagram illustrating a state when the document imaging apparatus according to the embodiment of the present invention is used, and is an external perspective view illustrating a case where a wireless signal of a remote control switch is emitted toward an operation button.

FIG. 3 is a block circuit diagram for explaining a circuit configuration of a document imaging device according to an embodiment of the present invention.

FIG. 4 is a cross-sectional view showing a mechanical structure of a document imaging device according to an embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a mechanical structure of a document imaging device according to an embodiment of the present invention.

FIG. 6 is a plan view of the mechanism on the document front side showing the document drive unit of the document imaging apparatus according to the embodiment of the present invention.

FIG. 7 is a plan view of a document back side mechanism showing a document driving unit of the document imaging apparatus according to the embodiment of the present invention.

FIGS. 8A and 8B are views for explaining a document separating / feeding operation in the document driving unit, in which FIG. 8A shows a state in which a document bundle is set, and FIG. 8B shows a state at the start of the separating / feeding operation. It is a figure which respectively shows.

FIG. 9 is an enlarged view showing a main part of a document separating / feeding operation of the document imaging apparatus according to the embodiment of the present invention.

FIG. 10 is a diagram for explaining a sub-scanning operation in the document driving mechanism after the drive motor of the document imaging device according to the embodiment of the present invention is switched in the reverse direction.

FIG. 11 is an enlarged cross-sectional view showing a case where there is no document by extracting a portion of an optical system through which a document of the document imaging apparatus according to the embodiment of the present invention passes.

FIG. 12 is an enlarged cross-sectional view showing a case where there is a document by extracting a portion of an optical system through which a document of the document imaging apparatus according to the embodiment of the present invention passes.

FIG. 13 is a perspective view of a main part of a document driving mechanism in the document imaging apparatus according to the embodiment of the present invention, which is extracted from the bottom and shown from below.

14A and 14B are partial plan views showing a stored state of a document tray of the document imaging apparatus according to the embodiment of the present invention, in which FIG. 14A is a view from above and FIG. 14B is a view from below.

FIG. 15 is a partial plan view showing a use state of the document tray of the document imaging apparatus according to the embodiment of the present invention,
(A) is a figure shown from an upper part, (b) is a figure shown from a lower part.

FIG. 16 is a side sectional view illustrating an axial shifting operation of the document guide of the document imaging device according to the embodiment of the present invention.

FIG. 17 is an external perspective view of the lower main body B of the document imaging apparatus according to the embodiment of the present invention.

FIG. 18 is an external perspective view of the drive mechanism unit U1 of the document imaging apparatus according to the embodiment of the present invention.

FIG. 19 is an external perspective view of the control board unit U2 of the document imaging apparatus according to the embodiment of the present invention.

FIG. 20 is an external perspective view of the operation button unit U3 of the document imaging apparatus according to the embodiment of the present invention.

FIG. 21 is a side cross-sectional view including a first example of the hinge shaft portion showing the connection relationship between the upper body A and the lower body B of the document imaging apparatus according to the embodiment of the present invention.

FIG. 22 is a side cross-sectional view including a first example of the hinge shaft portion showing the connection relationship between the upper main body A and the lower main body B of the document imaging apparatus according to the embodiment of the present invention.

FIG. 23 is a trihedral view and a perspective view of a second embodiment of the hinge shaft portion.

FIG. 24 is a trihedral view and a perspective view of a third embodiment of a hinge shaft portion.

FIG. 25 is a trihedral view and a perspective view of a fourth embodiment of a hinge shaft portion.

FIG. 26 is a flowchart showing a processing procedure after starting the document imaging apparatus.

FIG. 27 is a flowchart illustrating a document feeding and reading process procedure of the document imaging device.

FIG. 28 is a flowchart showing a document ejection processing procedure of the document imaging apparatus.

FIG. 29 is a flowchart showing a processing procedure for newly displaying an original by the original imaging device.

FIG. 30 is a flowchart showing a procedure for newly displaying a document of the document imaging apparatus, and is a flowchart showing a procedure for data transfer to a second buffer memory and data transfer to a display memory.

FIG. 31 is a flowchart showing a processing procedure of rotation display of the document imaging apparatus.

FIG. 32 is a flowchart illustrating a processing procedure of redisplaying a displayed document of the document imaging apparatus.

FIG. 33 is a diagram showing a structure of a document imaging device using a conventional area image sensor.

FIG. 34 is a block diagram showing a document imaging apparatus using a conventional linear image sensor.

[Explanation of symbols]

1 Original image pickup device, A upper body, B lower body, C
Device body, 2 linear image sensor (reading means), 2
a sensor part, 2b glass part, 2c light source part, 3 document position detector, 4 document drive mechanism (separation feeding means, sub-scanning means, discharge means), 5 A / D converter, 6 1st
Buffer memory, 7 second buffer memory, 8
Display memory, 9 video signal generator, 11 CPU
(Image signal processing means), 12 ROM, 13 display performance designating switch, 14 operation method designating switch, 1
5 display device, 16, 16 'document, 17 document stack, 1
8, 118 Document tray, 18a, 118a Support shaft receiving hole, 18b, 118b Support shaft, 18c, 118c
Gear tooth end, 18d, 118d dowel, 18r, 118
r rack unit, 19 document set detector, 20 feeding roller (separating feeding unit), 21 separating roller (separating feeding unit), 22 main roller (sub scanning unit), 23 discharging roller, 24 spacer, 25 white plate (Back lighting means), 26 connecting roller, 28 communication means, 29 image signal switching means, 30 personal computer (image signal generator), 31 main control board, 32 display device connecting connector (image signal output means), 33 communication Connector, 34 power connector, 35 image signal input connector (image signal input means), 36 communication device, 37 auxiliary roller spring, 38 communication signal switching means, 39 auxiliary roller base, 39f, 39f 'keyed fitting part , 45 Positioning lever, 46 Stop lever, 47 Feed roller shaft, 48 Separation roller shaft, 49, 50 Tray spring, 51 Feed pulley, 52 Separation pulley, 53 Transmission belt, 54 One-way clutch mechanism, 55 Stop lever pressing spring, 56 Stop lever friction plate, 58
Positioning lever push spring, 59 Positioning lever friction plate, 60, 60 'meshing gear, 61 Primary separation pad,
62 secondary separation pad, 63 secondary separation lever, 64
Separation lever spring, 65 main auxiliary roller, 66 discharge auxiliary roller, 68, 69 bearing, 75 operation button,
76 reflector, 77 light receiving element, 79 remote controller, 8
0,80 'hook, 81 fastening member, 82,82'
Shaft removal prevention member, 83 Shaft removal prevention hook, 97 upper case, 98 middle case, 99 lower case, 99a U-shaped groove, 100 drive motor, 101 motor gear, 10
2, 103, 113 transmission gear, 108 main drive gear, 111 feeding drive gear, 112 torque limiter,
114 discharge drive gear, 119 gear base plate, 119a
Hinge shaft, 120 decorative plate, 120a Hinge shaft, U1
Document driving unit, U2 control board unit, U3 operation button unit, 200 display communication cable, 20
1 AC / DC converter, 202 image data communication cable.

Continued front page    (72) Inventor Hiromi Yoshida             1224, Shimokagemori, Chichibu City, Saitama Prefecture Canon Electric             Child Co., Ltd. (72) Inventor Yuji Yokota             1224, Shimokagemori, Chichibu City, Saitama Prefecture Canon Electric             Child Co., Ltd. F term (reference) 5B047 AA01 BA01 BB02 BC21 CA08                       CA23                 5C022 AA13 AC42 AC69 AC74 AC78                       CA07                 5C052 GA02 GA03 GA09 GC05 GC10                 5C062 AA14 AB02 AB17 AB24 AB25                       AB32 AB33 AC12 AC22 BA01                 5C072 AA01 BA01 BA04 BA15 EA04                       NA01 NA05 RA10

Claims (7)

[Claims] 1. A reading unit having an image sensor for reading image information of an original document, and a sub unit for changing a relative position between the image sensor and the original document image at a predetermined speed in a direction orthogonal to a main scanning direction of the image sensor. Scanning means, image signal processing means for processing image data read by the reading means and sub-scanning means, image data read by the reading means and sub-scanning means, or an image processed by the image signal processing means An original image pickup apparatus comprising: an image pickup apparatus main body including image signal output means for outputting a signal to a display device; and image signal input means for inputting an image signal from a device other than the image pickup apparatus main body. 2. The document imaging apparatus according to claim 1, wherein the image signal obtained from the image signal input means is output from the image signal output means. 3. The image signal obtained from the image signal input means is output from the image signal output means via the image signal processing means.
The document imaging apparatus described. 4. The image pickup apparatus main body is provided with image signal switching means, and outputs the image signal obtained from the image signal input means or obtains it from the image signal processing means via the image signal switching means. 4. The original image pickup device according to claim 1, wherein it is possible to select whether to output an image signal. 5. The document imaging apparatus according to claim 1, wherein the image signal output means and the image signal input means have the same mechanical connection portion. 6. The image signal output means and the image signal input means have paths capable of communicating with the image signal processing means of the image pickup apparatus body.
The document imaging device according to any one of items 1 to 5. 7. The imaging device main body connected to the display device is a first-ranked aircraft, the imaging device main body connected to the first rank aircraft is a second-ranked aircraft, and the second-ranked aircraft is a second-ranked aircraft. The plurality of image pickup apparatus main bodies are sequentially connected so that the image pickup apparatus main body connected to each other becomes the third body, and in each connected, the upper image pickup apparatus main body controls the lower image pickup apparatus main body, 7. The image pickup apparatus main body of 1 does not control the upper image pickup apparatus main body, and the lower image pickup apparatus itself executes the upper control instruction.
The document imaging apparatus according to any one of items 1 to 5.