JPH0662183A - Electrophotographic device - Google Patents

Abstract

PURPOSE:To simplify adjustment by executing optical adjustment even without using any adjusting jig and omitting labor or skill for the adjustment by providing an optical adjusting mechanism for adjusting reflected light from an original. CONSTITUTION:A reading unit 42 of a scanner unit 40 is provided with an adjusting mechanism part 2 for optically adjusting a CCD 1. A Z direction adjusting part 4 of the adjusting mechanism part 2 is fitted to the three faces of a frame body 3 and can be moved in the Z direction of the optical axis direction of an optical path by adjusting an adjusting vis 4e. On the other hand, a rotating direction adjusting part 5 is provided with circular arc shaped inner faces 5a and 5b with an optical axis as a center and turned by an adjusting vis 5c against the energizing force of a leaf spring 5b. Further, a Y direction adjusting part 6 is moved vertically to the optical axis and an X direction adjusting part 7 is moved horizontally respectively by adjusting screws 6b and 7d against the energizing force of leaf springs 6a and 7c, and a gate direction adjusting part 8 is turned by an adjusting screw 8c in a gate direction to the optical axis.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrophotographic apparatus for moving a lamp unit as a light source with respect to a document and scanning the document for copying.

[0002]

2. Description of the Related Art Conventionally, in a digital copying machine, a scanner unit which collects light on an original and scans it to convert reflected light into an electric signal, and controls a laser light based on the electric signal to electrostatic latent image. A laser printer unit for forming an image on a photosensitive drum and copying an image of an original on recording paper, and a paper feeding unit for supplying the recording paper to the laser printer unit are provided.

For example, as shown in FIG. 24, the scanner section 100 has an original placing table 102 made of transparent glass or the like on the upper surface of the copying machine main body 101, and the original placing table 1 is provided.
A scanner unit 104 that irradiates the original 103 placed on 02 with light is further provided, and an automatic original feeder 105 such as a double-sided automatic original feeder (hereinafter referred to as RDF) is provided.

The scanner unit 104 includes a document 10
Lamp reflector assembly 1 which is a light source for exposing 3
06, a CCD substrate 107 including a charge-coupled device (hereinafter referred to as CCD) 107a as a photoelectric conversion device for converting a reflected light image from the original 103 into an electric signal, and its CC
A plurality of reflecting mirrors 1 for guiding the reflected light image to D107a
08, and the reflected light image from the original 103 is displayed on the CCD 10
A lens 109 for forming an image on the light receiving surface of 7a is provided.

The scanner section 100 includes a document placing table 10
When scanning the original 103 placed on the second sheet 2, the image of the original 103 is read while the scanner unit 104 moves along the lower surface of the original placing table 102.

Therefore, in order to reciprocate the scanner unit 104 in the scanning direction, the guide shaft 110 for guiding the scanner unit 104 in the scanning direction (S in the figure) is provided near the side of the scanning direction of the scanner unit 104. The endless drive wire 111 for moving the scanner unit 104 is connected to the drive pulley 112.
A motor 114 that is wound between the idle pulley 113 and drives the drive pulley 112 is provided.

On the other hand, when the automatic document feeder 105 is used, after the scanner unit 104 is moved to a predetermined position below the automatic document feeder 105 by the motor 114 or the like, the scanner unit 104 is stopped. The document image is read by the scanner unit 104 while the document 103 is being conveyed in the automatic document feeder 105.

In this way, the original image is read by the scanner unit 1
Although not shown, the image data obtained by reading at 04 is sent to the image processing circuit and subjected to various processing, then temporarily stored in the memory of the image processing circuit, and the image data in the memory is stored in accordance with the output instruction. Is output to the laser printer unit to form an image on a sheet.

By the way, the electrophotographic apparatus as described above is
If the amount of reflected light is insufficient, the reliability of the image data decreases and the obtained copy image becomes unclear.
Each optical system is adjusted so that the amount of light received at a is maximized.

[0010]

However, in the above-mentioned conventional configuration, the following problems occur in the optical adjustment in the scanner unit 104. First, in the optical adjustment of the mounting position of the CCD 107a on the CCD substrate 107, for example, as shown in FIG.
It is attached by being inserted into the CCD substrate 107 on the back side of 07a, the power supply 116, the scanner unit 104 and the lamp reflector assembly 106 shown in FIG.
Are connected to each other, and the output of the CCD 107a is connected to an oscilloscope for measurement (not shown), and then the adjustment pattern is placed at a predetermined position on the document placing table (not shown).

The focus in such optical adjustment is
While observing the above-mentioned oscilloscope, the lens 109 is reciprocally moved in the optical axis direction of the optical path for adjustment, while the adjustment jig 115 is adjusted while observing the oscilloscope for adjustment in each direction orthogonal to the optical axis direction and tilting. To operate.

Therefore, there arises a problem that the above-mentioned adjustment jig 115 is attached, and after the adjustment, it is necessary to remove the scanner unit 104 without adversely affecting the scanner unit 104.

On the other hand, the lamp reflector assembly 106
26A, as shown in FIG. 26A, the light condensing position of the lamp reflector assembly 106 on the original 103 and the arrival position of the optical path on the original 103, which traces the reflection mirrors 108 ... Is required to increase the light efficiency of the lamp reflector assembly 106 and make the image data more accurate. For this reason, the dimensional accuracy of each member is increased, and the mounting accuracy of each member is also increased so that they match within an allowable range.

However, in the above-mentioned prior art, FIG.
As shown in (b), the lamp reflector assembly 10
6, the condensing position on the original 103, and the original 103 of the optical path that traces the reflection mirrors 108 ...
In such a case, the lamp reflector assembly 106 to the CCD 10 may be different.
The amount of light reaching 7a decreases below the set value, and the CCD 10
There is a problem that the reliability of the image data from 7a is reduced.

Further, as shown in FIG. 27, when the automatic document feeder 105 is used, the automatic document feeder 10 is used.
The scanner unit 104 is moved to a predetermined position below 5 by the motor 114 or the like, and as shown in FIG. 28A, the reading position is set so that the optical axis of the optical path in the scanner unit 104 passes. Is desirable.

Therefore, conventionally, the optical axis is set by the laser light emitting device 117 in place of the CCD 107a, and the angle of the reflection mirror 108 is adjusted by advancing and retracting each adjusting screw 108a so as to coincide with the reading position. It was

At this time, since the angle adjustment for matching the optical axes and the angle adjustment for maximizing the light amount are different from each other, the adjustment of one may cause the other to be misaligned, and the above-mentioned angle adjustments need to be repeated to make the adjustment time-consuming. Is occurring.

[0018]

In order to solve the above-mentioned problems, an electrophotographic apparatus according to claim 1 of the present invention is provided with a light source for irradiating a document with light, and detects light reflected from the document. And an optical adjustment mechanism for adjusting the reflected light is provided in the electrophotographic apparatus for copying the document based on the electric signal.

The electrophotographic apparatus according to claim 2 of the present invention comprises:
In order to solve the above problems, a light source for irradiating a document with light is provided, and light detection means for detecting reflected light from the document and converting the reflected light into an electric signal is provided. In an electrophotographic apparatus which is provided with a driving means for moving the light source and the light detecting means, and which copies the document based on the electric signal, the light source is displaced with respect to the light detecting means in accordance with the movement of the light detecting means. Displacement means is provided for controlling the driving means based on the electric signal to set a displacement position of the light source that maximizes the reflected light.

The electrophotographic apparatus according to claim 3 of the present invention comprises:
In order to solve the above problems, a light source for irradiating a document with light is provided, and light detection means for detecting reflected light from the document and converting the reflected light into an electric signal is provided. A drive unit for moving the light source and the light detection unit is provided, and a document feeding mechanism for conveying the document at a predetermined position and reading it by the light detection unit is provided, and the document is copied based on the electric signal. In the electrophotographic apparatus, a reflecting plate is rotatably provided on the optical path of the reflected light, and an adjusting plate movably attached along the moving direction of the light source has one end portion thereof having one end portion of the reflecting plate. It is characterized in that it is provided so as to abut.

[0021]

According to the structure described in claim 1, since the optical adjusting mechanism for adjusting the reflected light is provided, it is possible to perform the optical adjustment without using an adjusting jig as in the prior art.

According to the above-mentioned structure of the present invention, there is provided the control means for controlling the driving means on the basis of the electric signal to set the displacement position of the light source for maximizing the reflected light. Therefore, the optical axis of the optical path reaching the light detecting means can be easily aligned with the condensing position of the light source.

According to the third aspect of the present invention, the reflecting plate is rotatably provided on the optical path of the reflected light, and the adjusting plate mounted so as to be movable along the moving direction of the light source, The one end portion is provided so as to contact the one end portion of the reflection plate.

From this, for example, when the light source and the light detecting means are stopped with respect to the original, and the original is conveyed and copied, first, the angle adjustment is performed so that the optical axes coincide with each other, and then the light amount is adjusted. When the angle is adjusted to maximize, the adjustment plate moves in accordance with the rotation of the reflection plate, so that the stop position of the light source and the light detection unit with respect to the document can be moved. It is possible to correct the deviation of the optical axis due to the adjustment of the angle.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention is shown in FIGS.
The explanation is based on the following. First, a digital copying machine equipped with an optical device mounting mechanism according to the present invention will be described. In the digital copying machine, as shown in FIG. 2, the copying machine main body 30 includes a scanner section 31, a laser printer section 32, and a multi-stage feed. Paper unit 33 and sorter 34
Is provided.

The scanner section 31 includes a document placing table 35 made of transparent glass, an automatic document feeder (hereinafter referred to as ADF) 36 such as a double-sided automatic document feeder, and a scanner unit 40. The multi-stage paper feeding unit 33 includes a first cassette 51, a second cassette 52, and a third cassette 5.
3 and a large capacity cassette 55 that can be added by selection.

In such a multi-stage sheet feeding unit 33, the sheets stored in the cassettes 51 of the respective stages are taken out one by one from the top and conveyed to the laser printer section 32. Further, the ADF 36 sets a plurality of originals at one time, automatically sends the originals one by one onto one end of the original placing table 35, conveys the originals in a predetermined direction, and responds to the operator's selection. The scanner unit 40 is configured to read one side or both sides of a document.

The scanner unit 40 includes a lamp reflector assembly 41 as a light source for exposing a document, and a plurality of reflecting mirrors for guiding a reflected light image from the document to a reading unit 42 having a charge coupled device (hereinafter referred to as CCD). (Reflector) 43, and the reflected light image from the original,
The reading unit 42 includes a lens 44 for forming an image on the light receiving surface of the photoelectric conversion element. In the reading unit 42, another photoelectric conversion element can be used instead of the CCD.

When scanning the original placed on the original placing table 35, the scanner section 31 drives the scanner unit 40 along the lower surface of the original placing table 35 to drive the driving wire 31a.
When the ADF 36 is used, the original image is read while the original is conveyed while the scanner unit 40 is stopped at a predetermined position below the ADF 36. There is. The driving of the scanner unit 31 will be described in detail later.

In this way, the original image is read by the scanner unit 4
The image data obtained by reading at 0 is sent to an image processing circuit described later and subjected to various processing, and then temporarily stored in the memory of the image processing circuit, and the image data in the memory is stored according to an output instruction. It is output to the laser printer unit 32 to form an image on a sheet.

The laser printer unit 32 includes a manual document tray 45, a laser writing unit 46, and an electrophotographic process unit 47 for forming an image. The laser writing unit 46 is a semiconductor laser that emits a laser beam according to the image data from the above-described memory, a polygon mirror that deflects the laser beam at a constant angular velocity, and a laser beam that is deflected at a constant angular velocity is exposed by the electrophotographic process unit 47. Body drum 4
8 has an f-θ lens and the like for performing correction so that the light is deflected at a constant speed.

In the electrophotographic process section 47, a charging device, a developing device, a transfer device 48a, a peeling device, a cleaning device, and a static eliminator are arranged around the photosensitive drum 48 according to a well-known mode.
Further, a conveyor belt 48b is provided on the paper output side of the transfer device 48a.
A fixing device 49 is arranged through the.

A transport path 50 is provided on the downstream side in the transport direction of the sheet on which the image is fixed by the fixing device 49, and the transport path 50 communicates with the sorter 34.
And the conveying path 5 leading to the multi-stage sheet feeding unit 33 below
It branches into 8 and.

The conveying path 58 is branched in the multi-stage sheet feeding unit 33, and the reversing conveying path 50 is formed as a conveying path after branching.
a and a double-sided / composite transport path 50b are provided. The reverse conveyance path 50a is a conveyance path for reversing the front and back sides of the transferred and fixed paper in the double-sided copy mode for copying both sides of the original.

On the other hand, in the double-sided copy mode, the double-sided / composite conveying path 50b conveys the paper whose front and back sides are reversed by the reverse conveying path 50a to the image forming position of the photoconductor drum 48, and a different original on one side of the paper. In the single-sided composite copy mode in which the image and the image are formed by using toners of different colors, the sheet is conveyed to the image forming position of the photosensitive drum 48 without reversing the paper.

The multi-stage paper feeding unit 33 includes a common transport path 56, and the common transport path 56 includes the first cassette 5
The sheets from the first, second, and third cassettes 52, 53 are conveyed toward the electrophotographic process section 47, and further, on the way to the electrophotographic process section 47, a conveyance path from the large-capacity cassette 55. It merges with 59 and leads to the transport path 60.

The transport path 60 is a double-sided / composite transport path 50b.
At the confluence point 62 with the conveyance path 61 from the manual document tray 45, and leads to the image forming position between the photoconductor drum 48 of the electrophotographic process section 47 and the transfer device 48a. The confluence point 62 is provided close to the image forming position.

As described above, in the above configuration, the image data read by the scanning unit 31 is stored in the memory, and the image data read from the memory is
A laser beam corresponding to the image data is scanned on the surface of the photosensitive drum 48 by the laser writing unit 46 to form an electrostatic latent image on the surface of the photosensitive drum 48, and then the electrostatic latent image is formed. The toner image obtained by visualizing the image with toner is electrostatically transferred and fixed on the sheet conveyed from the multi-stage sheet feeding unit 33, and is copied on the sheet.

The sheet on which the image is formed in this way is
It is sent from the fixing device 49 to the sorter 34 via the transport path 50 and the transport path 57 and discharged to the outside, or to the reverse transport path 50a and the double-sided / composite transport path 50b via the transport path 50 and the transport path 58. It is transported and double-sided copied or synthetically copied.

Next, the structure and function of the above-mentioned image processing circuit included in such a digital copying machine will be described. As shown in FIG. 3, which is a block diagram showing the above configuration, the image processing circuit includes an image data input unit 70, an image processing unit 71, an image data output unit 72, a memory 73 including a RAM (random access memory), and the like. And a central processing unit (hereinafter referred to as CPU) 74.

The image data input section 70 is a CCD section 70.
a, histogram processing unit 70b, error diffusion processing unit 70c
The image data of the original read from the CCD 42 shown in FIG. 2 is binarized and converted, and while the histogram is taken as a binary digital amount, the image data is processed by the error diffusion method, It is adapted to be temporarily stored in the memory 73.

Further, the processing of the image data in the image data input section 70 will be described. First, the CCD section 7
In 0a, after the analog electric signal corresponding to each pixel density of the image data from the reading unit 42 shown in FIG. 2 is A / D converted, MTF correction, black and white correction or gamma correction is performed, and 256 gradations (8 It is output to the histogram processing unit 70b as a (bit) digital signal.

Next, in the histogram processing section 70b, C
The digital signal output from the CD unit 70a is added for each pixel density of 256 gradations to obtain density information (histogram data), and the density information obtained as necessary is sent to the CPU 74 or pixel data. Is sent to the error diffusion processing unit 70c.

Further, the error diffusion processing unit 70c outputs from the CCD unit 70a by an error diffusion processing method which is a kind of pseudo halftone processing, that is, a method of reflecting a binarization error in the binarization judgment of an adjacent pixel. The obtained 8-bit / pixel digital signal is converted into 1-bit (binary), and a redistribution operation is performed to faithfully reproduce the local area density in the original.

The image processing section 71 is a multi-value processing section 7.
1a and multi-value processing unit 71b, synthesis processing unit 71c, density conversion processing unit 71d, scaling processing unit 71e, image processing unit 71f, error diffusion processing unit 71g, and compression processing unit 7
Includes 1h.

The image processing section 71 is a processing section for converting the input image data into image data desired by the operator, and until the image data is finally stored in the memory 73 as the converted output image data. It is designed to be processed by the processing unit. However, each of the above-mentioned processing units included in the image processing unit 71 functions as necessary,
It may not work.

Further, the function of each processing unit in the image processing unit 71 will be described. First, the multi-value quantization processing unit 71a.
In the multi-value quantization processing unit 71b, the data binarized by the error diffusion processing unit 70c is converted again into 256 gradations. In the combination processing unit 71c, a logical operation for each pixel, that is, an operation of a logical sum, a logical product, or an exclusive logical sum is selectively performed. The data to be subjected to these operations are pixel data stored in the memory 73 and bit data from a pattern generator (PG) that stores preset words and symbols.

Next, the density conversion processing section 71d arbitrarily sets the relationship between the input density and the output density for the digital signal of 256 gradations based on a predetermined gradation conversion table. In the scaling processing unit 71e, the pixel data (density value) for the target pixel after scaling is obtained by performing interpolation processing based on the input known data according to the instructed scaling ratio, and the sub-scanning is performed. Is scaled and then the main scanning is scaled.

In the image processing section 71f, various image processings may be performed on the input pixel data and information collection such as feature extraction may be performed on the data string. In the error diffusion processing unit 71g, the input image data input unit 70
Processing similar to that of the error diffusion processing unit 70c is performed.

In the compression processing section 71h, the binary data is compressed by the encoding called run length. Further, regarding the compression of the image data, the compression functions in the coral processing loop when the final output image data is completed.

The image data output unit 72 is the restoration unit 7
The image data stored in the memory 73 in a compressed state is restored by including the original data 256a, the multi-value processing unit 72b, the error diffusion processing unit 72c, and the laser output unit 72d.
The laser output unit 72 converts the gradation into another gradation and diffuses the error in the four-valued data, which is a smoother halftone expression than the binary data.
It is designed to transfer data to d.

That is, the decompression unit 72a decompresses the image data compressed by the compression processing unit 71h. The multilevel halftoning processing unit 72b performs the same processing as the multilevel halftoning processing unit 71a and the multilevel halftoning processing unit 71b of the image processing unit 71. The error diffusion processing unit 72c performs the same processing as the error diffusion processing unit 70c of the image data input unit 70.

In the laser output section 72d, the digital pixel data is converted into a laser on / off signal based on a control signal from a sequence controller (not shown), and the laser is turned on / off. The data handled by the image data input unit 70 and the image data output unit 72 is basically stored in the memory 73 in the form of binary data in order to reduce the capacity of the memory 73. It is also possible to process in the form of four-valued data in consideration of deterioration.

Next, as shown in FIG. 4, the driving of the scanning unit 31 will be described in more detail. In the scanning unit 31, in order to reciprocally move the scanner unit 40 in the scanning direction, the scanner unit 40 is moved in the scanning direction ( A guide shaft 31e for guiding to S) in the figure is provided near the side of the scanner unit 40 in the moving direction, and an endless drive wire 31a for moving the scanner unit 40 is provided between the drive pulley 31b and the idle pulley 31c. A motor (driving means) 31d that is wound around and that drives the drive pulley 31b is provided.

On the other hand, when the ADF 36 is used, AD
After the scanner unit 40 is moved to a predetermined position below F36 by the motor 31d or the like, the document 35a on the document table 35 is conveyed in the ADF 36 as is well known in the state where the scanner unit 40 is stopped. An image is read by the scanner unit 40.

Next, the reading unit 42 in the scanner unit 40 will be described. In the reading unit 42, the CCD (light detecting means) 1 which is a photoelectric conversion element is attached on the optical path from the lens 44, and further, in the figure As shown in FIG. 1, FIG. 5 and FIG.
An adjusting mechanism section 2 is provided for attaching the lens so as to be optically adjustable.

Such an adjusting mechanism section 2 is provided on the outer surface of the scanner unit 40 to which the lens 44 is attached or which is provided with an opening through which the light from the lens 44 passes, and the CCD 1 is connected to the optical path. Can be adjusted in the Z direction as the optical axis direction, the rotation direction in which the optical axis is rotated about the optical axis, the Y direction as the vertical direction, the X direction as the horizontal direction, and the tilt direction with respect to the optical axis.

First, in order to mount the adjusting mechanism section 2 on the outer surface of the scanner unit 40, the optical paths are
That is, the frame body 3 made of a plate-like body is provided so as to surround the Y direction and the X direction, and the Z direction adjusting portion 4 movable in the Z direction which is the optical axis direction of the optical path is provided on the three surfaces of the frame body 3. It is slidably fitted.

The Z-direction adjusting portion 4 as described above is formed in a substantially box shape so as to be fitted to the three surfaces of the frame body 3 and to fit a rotation direction adjusting portion 5 which will be described later. It has an opening through which an optical path is passed, and further has an upright portion 4a having a rectangular cross section as a guide for moving the Z-direction adjusting portion 4 in the optical axis direction on the lower surface, so that the Z-direction adjusting portion 4 can be stabilized. It has a leaf spring 4b as a biasing means for moving it.

Therefore, an opening 3b is provided in the lower portion 3a of the frame 3 so that the standing portion 4a is fitted, and a fixing screw 4c for fixing the leaf spring 4b is provided in the frame 3.
Is attached to the upper part 3c from above.

Further, in the Z-direction adjusting section 4, the standing section 4a
A coil spring 4 for adjustment between the scanner unit 40 and the scanner unit 40.
The adjustment screw 4e for Z direction penetrates the standing portion 4a and the coil spring 4d via d, and can be screwed to the female screw portion of the scanner unit 40 to adjust the adjustment screw 4e for Z direction. As a result, the Z direction adjusting unit 4 can be moved in the Z direction. Further, a Z-direction fixing screw 4f for fixing the adjusted Z-direction adjusting portion 4 is attached through the frame upper portion 3c.

Next, description will be made on the above-mentioned rotation direction adjusting portion 5 mounted so as to be rotatable around the above-mentioned optical axis. The rotation direction adjusting portion 5 is fitted with a Y direction adjusting portion 6 which will be described later. It is formed in a substantially box shape having a recess and having an opening through which the above-mentioned optical path passes.

Further, the rotation direction adjusting section 5 has the optical axis centered at two positions on the outer surfaces which are substantially opposite to each other across the optical axis so that the optical axis can be stably rotated about the optical axis. And has arc-shaped inner surfaces 5a and 5a. Therefore, also on the inner surface of the Z-direction adjusting portion 4, there are formed arc-shaped inner surfaces 4g, 4g which are in sliding contact with the above-mentioned arc-shaped inner surfaces 5a, 5a.

In addition, the rotating direction adjusting portion 5 is provided with a rotating leaf spring 5b for urging the rotating direction adjusting portion 5 in one direction, and a rotation with the concave surface 4h adjacent to one arcuate inner surface 4g of the Z direction adjusting portion 4. While being sandwiched between the outer surface of the direction adjusting portion 5 and the outer surface of the portion of the Z direction adjusting portion 4 facing the concave surface 4h, the rotation direction adjusting screw 5c can be moved by a screw through the above portion. Is attached to.

As a result, the tip of the rotating direction adjusting screw 5c abuts on the rotating direction adjusting portion 5, so that the rotating leaf spring 5b is rotated.
By moving up and down against the urging force of, the rotation direction adjusting unit 5 is rotatable about the optical axis.

Next, the above-mentioned Y-direction adjusting portion 6 which is attached so as to be movable in the Y-direction as the vertical direction with respect to the optical axis will be described. The Y-direction adjusting portion 6 includes an X-direction adjusting portion 7 which will be described later. Sliding contact with both Y-direction end faces and X
The direction adjusting portion 7 is formed in a substantially box-like shape having a recess that allows the direction adjusting portion 7 to slide in the X direction, and an opening through which the optical path passes is formed in the center thereof.

Further, the Y-direction adjusting portion 6 has a pair of substantially square V-shaped adjusting leaf springs 6 for urging the Y-direction adjusting portion 6 upward.
a is sandwiched between the lower outer surface of the Y-direction adjusting portion 6 and the lower inner surface of the rotation-direction adjusting portion 5 so as to be equidistant from the optical axis, while the upper outer surface of the Y-direction adjusting portion 6 is a. The Y-direction adjusting portion 6 against the biasing force of each of the adjusting leaf springs 6a.
A Y-direction adjusting screw 6b capable of moving is attached through a screw at the center of the upper surface of the rotation-direction adjusting unit 5.

Accordingly, when the Y-direction adjusting screw 6b is rotated, the Y-direction adjusting screw 6b moves up and down, and the Y-direction adjusting portion 6 is stably moved up and down, that is, Y by the biasing force of each adjusting leaf spring 6a. You can move in any direction. Therefore, a Y-direction adjusting notch 6c is formed in the upper center of the Z-direction adjusting portion 4 so that the Y-direction adjusting screw 6b can be rotated from above by a driver or the like.

Next, the above-mentioned X-direction adjusting portion 7 mounted so as to be movable in the X-direction as the left-right direction with respect to the optical axis will be described. The X-direction adjusting portion 7 will be described later. Is formed in a substantially box shape having a recess having an inner surface that slides on both end surfaces in the Y direction, and further has an opening for passing the optical path in the center thereof.

The X-direction adjusting section 7 is pivotally supported by a pair of fixing screws 8a which are inserted from the outside to fix the tilt-direction adjusting section 8 in order to rotate the tilt-direction adjusting section 8. The pair of projecting pieces 7a that are
Are formed at one end in the X direction so as to face each other outward in the Z direction.

Then, the X-direction adjusting unit 7 is set to the X-direction.
An inclined portion 7b is formed at one end of the X-direction adjusting portion 7 in the X-direction so as to move in the direction. That is, the length of the inclined portion 7b in the X-direction adjusting portion 7 in the X-direction gradually decreases from the bottom to the top.

Moreover, in the X-direction adjusting portion 7, the X-direction adjusting leaf spring 7c is sandwiched between the Y-direction adjusting portion 6 and the X-direction adjusting portion 7 on the opposite side of the inclined portion 7b, while the X-direction adjusting leaf spring 7c is inserted. The direction adjusting screw 7d is inserted downward from the upper surface of the Y direction adjusting portion 6 in the Y direction so that the tip of the direction adjusting screw 7d comes into contact with the inclined portion 7b. By rotating the X direction adjusting screw 7d to move it up and down, The X-direction adjusting portion 7 can be moved against the biasing force of the X-direction adjusting leaf spring 7c. On the other hand, an X-direction adjusting notch 7e is formed at one end of the upper surface of the Z-direction adjusting portion 4 so that the X-direction adjusting screw 7d can be rotated by inserting a driver or the like from above.

Next, description will be made on the above-mentioned tilt-direction adjusting section 8 which is rotatably attached in the tilt direction with respect to the optical axis. The tilt-direction adjusting section 8 is provided with an opening and a hollow portion through which the optical path is passed. In addition,
A pair of plate-shaped pieces 8d to which the fixing screws 8a are respectively screwed are provided so as to be inside the protruding pieces 7a.

Further, the tilt direction adjusting portion 8 has a generally square V-shaped tilt direction adjusting leaf spring between the tilt direction adjusting portion 8 and the X direction adjusting portion 7 on the opposite side of the plate-shaped pieces 8d. Since 8b is sandwiched and the tilt direction adjusting screw 8c penetrates the tilt direction adjusting portion 8 and the tilt direction adjusting leaf spring 8b and is attached to the female screw portion of the X direction adjusting portion 7,
By rotating the tilt-direction adjusting screw 8c and moving it in the Z direction, the tilt-direction adjusting portion 8 can be rotated in the tilt direction.

Further, the adjusting mechanism section 2 is provided with an adjusting mechanism section cover 9 having a substantially rectangular plate shape for restricting the movement of the adjusting sections 5, 6 and 7 in the Z direction, and each mounting screw 9 is passed through its four corners.
It is attached to the four corners of the Z-direction adjusting section 4 by a ... Therefore, such an adjusting mechanism cover 9 is provided with an opening through which the optical path is passed, and is further provided with a notch so that each of the projecting pieces 7a can be projected outward.

Then, the CCD mounting plate 10 for fixing the CCD 1 to the adjusting mechanism section 2 is attached to the tilt direction adjusting section 8 by a pair of fixing screws 10a, and the output from the CCD 1 is taken out. The CCD board 11 serving as a board for each terminal in this case has four mounting screws 11a ...
Is attached to the CCD mounting plate 10.

The CCD mounting plate 10 is formed with an opening through which the optical path passes. On the other hand, the CCD substrate 11 is provided with a pair of fixing screws 10a so that the fixing screws 10a can be detached from the outside. An opening is formed.

In this way, the adjusting mechanism section 2 is operated by the CCD 1
Can be adjusted in the Z direction as the optical axis direction of the optical path, the rotation direction in which the optical axis is rotated about the optical axis, the Y direction as the vertical direction, the X direction as the horizontal direction, and the tilt direction with respect to the optical axis. ing.

Next, by changing the optical path length of each reflection mirror 43 ... In the scanner unit 40, the magnification adjusting unit 12 for adjusting the reduction ratio of the original image reduced on the CCD 1 to adjust the magnification, the lens 44. Of the reflection mirror 43c.
Is equipped with.

As shown in FIG. 7, such a magnification adjusting section 12 has a mounting plate 12a for covering the back side of the substantially rectangular plate-shaped reflecting mirror 43c, and elastically the longitudinal ends of the reflecting mirror 43c, respectively. The holding plate 12b has a pair of U-shaped holding plates 12b for holding, and each holding plate 12b is fixed to both ends of the mounting plate 12a in the longitudinal direction, while the mounting plate 12a holds the reflection mirror 43c. As an attachment for attaching at a predetermined angle, it has an angle portion 12f bent at a predetermined angle.

The magnification adjusting section 12 also includes a reflection mirror 4
In order to finely adjust the mounting position of 3c, three adjusting screws are provided at both ends of the mounting plate 12a in the longitudinal direction,
One adjusting screw 12c is attached to one female end of the mounting plate 12a so as to abut on the rear surface of the reflecting mirror 43c toward the longitudinal centerline of the reflecting mirror 43c.

On the other hand, the other two adjusting screws 12d are directed to a position different from the above center line and contact the back surface of the reflecting mirror 43c at a position equidistant from the above center line. It is attached to the female screw portion of the mounting plate 12a.

As a result, the above-mentioned three adjusting screws 12c are provided.
・ By moving 12d in the same direction, it is possible to change the optical path length. On the other hand, when the adjusting screw 12c and the two adjusting screws 12d are moved in opposite directions, the optical path is changed in the left and right directions. Further, by moving the two adjusting screws 12d in mutually opposite directions, the optical path can be changed in the vertical direction.

In this way, each adjustment screw 12c / 12d / 1
By adjusting 2d, the optical path reflected by the reflection mirror 43c can be adjusted by changing the length, the horizontal direction, and the vertical direction. In this way, the adjusting mechanism section 2 and the magnification adjusting section 12 constitute an optical adjusting mechanism.

Next, using the adjusting mechanism section 2 and the magnification adjusting section 12, the CCD in the scanner unit 40 is
The optical adjustment method of No. 1 will be described. First, using the motor 31d shown in FIG. 4, as shown in FIG. 8, on the side where the reading reversal operation is performed, outside the area for placing the original, and the lamp reflector. The light from the assembly 41 is condensed and moved to a position where the reflected light from the document table 35 can be received.

Subsequently, the oscilloscope 13 for measurement is connected to the CCD substrate 11 provided with the terminals for measurement from the CCD 1, and the adjustment pattern 14 shown in FIG. 9 is condensed with the light from the lamp reflector assembly 41. After being placed on the document table 35, the lamp reflector assembly 41 is turned on to read the adjustment pattern 14 into the CCD 1.

Next, according to the following procedure, as shown in FIG. 8, the driver 15 adjusts each adjusting screw to adjust the adjusting mechanism section 2 and the magnification adjusting section 12. The adjustment procedure is in the order of focus alignment → optical axis alignment → position alignment → magnification alignment.

As shown in FIG. 9, the adjusting pattern 14 is formed in a rectangular shape, and straight lines in the lateral direction are provided on the adjusting pattern 14 at predetermined intervals. In the adjustment pattern 14, (1), (7) and (13) are read width (position) adjustment patterns, and (3), (5), (9) and (11) are focus adjustment patterns. (3 / mm), (2), (4), (6), (8), (10), (12)
Is a pattern for optical axis alignment.

First, for focusing, the Z-direction adjusting section 4 in the adjusting mechanism section 2 is moved by moving the Z-direction adjusting screw 4e while observing the oscilloscope 13, and as shown in FIG. As shown in FIG. 11B after the focus adjustment, the Z pattern is generated from the position 11 (a) at the position where the waveforms corresponding to (3), (5), (9), and (11) in the adjustment pattern 14 appear.
The direction adjusting unit 4 is adjusted.

In addition, after adjusting so that the waveforms at the (3), (5), (9), and (11) parts are maximized and have a uniform width on the left and right sides, the Z direction fixing is performed. Tighten the screw 4f to fix the Z-direction adjusting portion 4. As shown in FIG. 11 (c), (3),
If the waveforms (5), (9), and (11) appear, the waveforms at other locations may be ignored.

Next, in aligning the optical axes, the rotation direction adjusting unit 5, the Y direction adjusting unit 6, and the tilt direction adjusting unit 8 are moved to move from FIG. 12A to FIG.
As shown in (c), the widths of the waveforms indicating (4) and (10) are flat, and adjustment is performed so that the (2) and (12) parts are exposed. After such adjustment, the Y-direction adjusting unit 6 is moved up and down slightly so that the waveform moves symmetrically with respect to the central axis.

Next, in the alignment, the X-direction adjusting unit 7 is moved by the X-direction adjusting screw 7d, and the C portion of the alignment signals A, B and C shown in FIG. )
Combine the waveform outputs (1) shown in (C part is shown in Fig. 13 (c)
When expanding like this, do it in the delay mode of the oscilloscope 13.) At this time, showing the optical axis alignment (2), (4),
While confirming that (10) and (12) are flat, X
The direction adjusting unit 7 is adjusted.

After the adjustment as described above, it is reconfirmed again whether the focusing, the optical axis alignment, and the position alignment are as shown in FIG. 10 as described above.

Next, in the magnification matching, the adjustment pattern 1
When the C section and (1) are aligned as described above so that the interval between (1) and (13) in 4 and the reading width match, the deviation between A section and (13) in FIG. So as to be within a specific number of pixels, each of the three adjustment screws 12c.
12d and 12d are moved in substantially the same direction with respect to the optical axis to change the optical path length and adjust the magnification.

By providing the adjusting mechanism section 2 and the magnification adjusting section 12 in this manner, it is possible to prevent the trouble of attaching and detaching the dedicated adjusting jig and the adverse effect on the attaching accuracy of the CCD 1 as in the conventional case. The labor and skill of attaching and detaching the above jig can be saved, and the optical adjustment of the CCD 1 can be easily performed.

Next, the lamp adjusting mechanism provided in the above electrophotographic apparatus will be described. First, as shown in FIG. 14, in the lamp adjusting mechanism 16, a lamp case 16a having a lamp reflector assembly 41 as a light source.
Is attached to the scanner unit 40 by a guide rail or the like (not shown) so as to be movable in the S direction.

Also, the S of the lamp case 16a
As shown in FIG. 15, a pair of coil springs 17 and 17 urges in one direction end in the S direction, and these urging directions are parallel to the optical axis direction of the optical path. Mounted so that they are equidistant.

On the other hand, a protrusion (displacement means) 18 extending outward in the S direction is provided at the other end of the lamp case 16a in the S direction, and the movement of the lamp case 16 can be locked and fixed. A set screw 19 is attached. In addition,
The biasing force of the coil springs 17 is set to be smaller than the driving force of the scanner unit 40 by the motor 31d described later.

Further, on the inner wall of the scanning unit 31, a protrusion 20 is erected so as to come into contact with the tip of the protrusion 18 when the scanner unit 40 moves so as to approach the inner wall. As shown in FIG. 15, four movable light control plates 16b are attached to the lamp case 16a, and they are fixed by fixing screws 16c.

On the other hand, in the electrophotographic apparatus as described above, as shown in FIG. 16, the CPU 74 for controlling the function of each member is used.
Is provided, and its CPU (control means) 74 is the CCD 1
The image processing system 21 that processes the image data from the image forming apparatus so that the laser printer unit 32 can form an image is controlled by AD.
The F36, the desk 23, the printer unit 32, the sorter 34, the drive motor 31d, and the scanning unit 31 which is an optical unit are controlled.

The image processing system 21 includes the image data input section 70, the image processing section 71, and the image data output section 72 shown in FIG. 3, and receives the image data from the CCD 1 as an input. The data preprocessing unit 21a,
An image processing unit 21b to which the image data from the input data preprocessing unit 21a is input, and a laser control unit 21c to which the image data from the image processing unit 21b is input are provided and processed by the image processing unit 21b. It has a memory 73 for temporarily storing the image data.

However, in FIG. 16, a unidirectional arrow indicates a control signal line, a bidirectional arrow indicates a communication control line, a white arrow indicates a data line, LS is a laser writing synchronization signal, and SS is a scanning unit reading. Indicates a sync signal.

Next, a method of adjusting the light collecting position of the lamp reflector assembly 41 using the above lamp adjusting mechanism 16 will be described. First, the locking screw 19 is loosened and the lamp case 16a is attached to the scanner unit 40. It is ready to move. Therefore, the lamp case 1
6a is in a position where the coil springs 17 are fully extended.

After that, on the outside of the original placing table 35, the scanner unit 40 is moved to the canopy region where the light of the lamp reflector assembly 41 can be irradiated, and the white plate 22 for adjusting the focal point is formed.
After attaching the scanner unit 40 to the motor 31d
Is driven in the S direction at a predetermined speed.

Subsequently, the lamp reflector assembly 41
Is condensed on the condensing point adjusting white plate 22 and reflected light from the condensing point adjusting white plate 22 is detected by the CCD 1 while moving the scanner unit 40. At this time, when the projecting portion 18 and the projecting portion 20 come into contact with each other, the lamp case 16a is stopped against the biasing force of the coil springs 17 even if the scanner unit 40 moves. There is.

That is, since the lamp case 16a moves with respect to the scanner unit 40, the converging position of the lamp reflector assembly 41 changes, and the above-mentioned C
The output electric signal from the CD 1 changes as the lamp case 16a moves.

That is, the lamp reflector assembly 4
While 1 is converging on the converging point adjusting white plate 22,
As shown in FIG. 18, when the scanner unit 40 is moved by the motor 31d, the output voltage of the CCD 1 changes with respect to the number of rotation pulses of the motor 31d, and the change becomes a graph convex upward.

Therefore, as shown in the graph above,
In the CPU 74, the number of rotation pulses of the motor 31d and CC
By storing the output voltage of D1 and comparing the change in the output voltage of CCD1, the number of rotation pulses of the motor 31d at the maximum value of the output voltage can be measured.

As a result, the output voltage of the CCD 1 is maximum,
That is, when the light collecting position of the lamp reflector assembly 41 is at the optimum position of the lamp case 16a,
After the scanner unit 40 is moved by controlling the number of rotation pulses of the motor 31d, the lamp case 16a is fixed by the locking screw 19, so that the lamp reflector assembly 4 can be obtained.
Adjustment of 1 is completed.

Thus, the lamp reflector assembly 4
Since it becomes possible to automatically adjust the condensing position of No. 1, the adjustment time can be shortened as compared with the conventional case where the cut-and-error method is manually adjusted.

Next, the position setting mechanism for accurately adjusting the reading position when the ADF 36 is used will be described.

In the scanner unit 40, as shown in FIG. 19, the reflection mirror 43 is attached so as to be rotatable while avoiding displacement of an imaginary plane including the optical axes of the incident light and the reflected light. ing. That is, a mirror support plate 24 is provided on the back side of the reflection mirror 43, and a pair of angle adjustment screws 24a, 24a are attached to the mirror support plate 24 so as to be movable back and forth side by side on the virtual plane. .The reflection mirror 4 has the tip of 24a
The reflection mirror 43 is supported by contacting the back surface of the reflection mirror 3.

As shown in FIG. 20, such a reflecting mirror 43 is provided with a plurality of fixing leaf springs 24b for urging toward the mirror supporting plate 24 at both end portions on the front surface side thereof. Even if the angle adjusting screws 24a, 24a are adjusted and moved back and forth, the fixing leaf springs 24b ... Are elastically displaced to hold the reflection mirror 43.

Thus, the reflection mirror 43 can change the angle between the incident light and the reflected light without rotating the virtual plane including the optical axes of the optical paths of the incident light and the reflected light. .

Further, in the scanner unit 40, a reading position adjusting plate 25 for adjusting the reading position of the scanner unit 40 is in contact with one end of the reading position adjusting plate 25 at the back side end of the reflection mirror 43, while the other reading position adjusting plate 25 is used. The end portion is attached so as to extend outward from the scanner unit 40 in the S direction, and the S direction is the movement direction of the scanner unit 40.
It is provided so as to be movable along the direction.

Further, a position fixing screw 26 is provided which can be pressed against the upper surface of the reading position adjusting plate 25 and can be stopped, so that the reading position adjusting plate 25 can be fixed at an arbitrary position.

On the other hand, on the inner wall of the scanning section 31, an adjusting plate stopper 27 that abuts the projecting end of the reading position adjusting plate 25 that moves together with the scanner unit 40 is erected so as to extend in the S direction. Therefore, when the reading position adjusting plate 25 and the adjusting plate stopper 27 come into contact with each other,
It is possible to set the scanner unit 40 at a predetermined position.

Next, the optical adjustment method in the scanner unit 40 when making a copy using the ADF 36 will be described. First, as shown in FIG. 19, the scanner unit 40 is moved to a predetermined reading position in the ADF 36, and The chart 14a for adjusting the optical axis shown in FIG. 21B is placed on the transparent plate 36b. The optical axis adjusting chart 14a is in the form of an elongated rectangular plate, and white circles 14b for optical axis adjustment are provided at the center in the longitudinal direction and at both ends of the reading width.

Next, the CCD 1 shown in FIG. 19 is removed, and the laser emitter 28 is placed at that position as shown in FIG.
Is set so as to emit light toward the lens 44, and the laser light thereof is first concentrically circled in the white circle 14b at the center of the optical axis adjusting chart 14a as shown in FIG. 21 (c). The angle of the reflection mirror 43 shown in FIG. 19 is adjusted by the angle adjusting screws 24a and 24a so that the optical axis of the scanner unit 40 is adjusted as shown in the light collecting section 14c.

At this time, since the CCD 1 is the line sensor and the image is read linearly, the white circles 14b at both ends of the optical axis adjusting chart 14a corresponding to the reading line of the CCD 1 are also concentric circles. Since it is necessary to adjust the laser light emitter 28 so that the incident light falls within the white circles 14 at both ends,
Shake horizontally to displace it so that it fits concentrically in b.

Next, as described above, the scanner unit 40
After adjusting the optical axis in, the optical sensor 29 is placed in place of the optical axis adjusting chart 14a, and the light amount level from the laser light emitter 28 is moved back and forth by the angle adjusting screws 24a and 24a. Move and adjust. That is,
The oscilloscope 13 for measurement is connected to the optical sensor 29, and the angle adjusting screws 24a and 24a are adjusted while observing the oscilloscope 13 to set the angle of the reflection mirror 43 that maximizes the light amount level in the optical sensor 29. To do.

At this time, since the reading position adjusting plate 25 and the reflection mirror 43 are brought into contact with each other, the angle change of the reflection mirror 43 as described above, for example, as shown in FIG. When rotated in the i direction, which is the clockwise direction, the reading position adjusting plate 25 moves in the j direction, which is the direction in which the length of the protruding portion increases, and conversely, as shown in FIG. When 43 rotates in the clockwise m direction, the reading position adjusting plate 25 moves in the n direction, which is the direction in which the length of the protruding portion decreases.

In this way, the angle of the reflecting mirror 43 is adjusted so that the optical axes coincide with each other and the maximum amount of light is obtained. As shown in FIG. 20 or FIG. Even if a difference occurs between the reading position and the optical axis, the stop position of the scanner unit 40 can be automatically set so that such a difference becomes zero.

Therefore, when copying using the ADF 36, since the reading position adjusting plate 25 is set as described above, the scanner unit 40 is driven by the motor 31d to read the reading position adjusting plate 25 and the adjusting plate stopper 27. If the scanner unit 40 is stopped at the position where
The optical axis can be aligned with a predetermined reading position of the DF 36.

However, as described above, the reading position adjusting plate 25
And the adjustment plate stopper 27 are brought into contact with each other, the above-mentioned C
Under the control of the PU 74, the scanner unit 40 is decelerated before the contact and driven at a low speed, and after the contact, the motor 3 is driven.
The motor 31d can be stopped when the load of 1d exceeds a certain value. As a result, it is possible to reduce the impact of the above difference in contact.

The optical adjustment by the reading position adjusting plate 25 associated with the angle adjustment of the reflection mirror 43 is correction of the optical axis due to the change in the angle of the reflection mirror 43.
Although it is not possible to cope with variations in the mounting position accuracy of No. 3 and other mounting and processing accuracy of other members in the scanner unit 40, the above-mentioned change in the angle of the reflection mirror 43 is the largest factor for the deviation of the optical axis. Therefore, the reflection mirror 43
It is possible to sufficiently cope with the deviation of the optical axis due to the angle adjustment.

As described above, in the above structure, even if the optical axis is displaced from the reading position due to the angle adjustment of the reflection mirror 43 in accordance with the light amount adjustment in the scanner unit 40, the reading position adjusting plate 25 causes the scanner unit 40 to stop. However, since the above-mentioned deviation can be automatically corrected to be zero, it is possible to save the trouble of adjusting the optical axis again and shorten the adjustment time.

[0128]

As described above, the electrophotographic apparatus according to the first aspect of the present invention is provided with the light source for irradiating the original with light, and detects the reflected light from the original and converts it into an electric signal. In the electrophotographic apparatus for copying the document based on the electric signal, the detecting means is provided, and the optical adjusting mechanism for adjusting the reflected light is provided.

Therefore, in the above configuration, since the optical adjustment mechanism for adjusting the reflected light is provided, the optical adjustment can be performed without using the adjustment jig as in the conventional art, and therefore the adjustment as in the conventional art can be made. The effect that the effort and skill of attaching the jig and removing the adjustment jig after adjustment without removing the adverse effect on the light detection means can be saved.

The electrophotographic apparatus according to claim 2 of the present invention comprises:
As described above, the light source that irradiates the original with light is provided, and the light detection means that detects the reflected light from the original and converts it into an electric signal is provided. The light source and the light detection are provided so as to scan the original. In the electrophotographic apparatus for copying the document on the basis of the electric signal, there is provided driving means for moving the means, and displacement means for displacing the light source with respect to the light detecting means in accordance with movement of the light detecting means. Is provided,
A control means is provided for controlling the drive means based on the electric signal to set a displacement position of the light source that maximizes the reflected light.

Therefore, in the above structure, the control means for controlling the driving means on the basis of the electric signal to set the displacement position of the light source for maximizing the reflected light is provided. It is possible to easily align the optical axis of the optical path reaching to the light collecting position of the light source.

Therefore, it is possible to prevent the deviation between the condensing position and the optical axis, so that it is possible to prevent the decrease in the amount of light reaching the light detecting means and to avoid the deterioration of the reliability of the image data from the light detecting means. Play.

The electrophotographic apparatus according to claim 3 of the present invention comprises:
As described above, the light source that irradiates the original with light is provided, and the light detection means that detects the reflected light from the original and converts it into an electric signal is provided. The light source and the light detection are provided so as to scan the original. In an electrophotographic apparatus for copying the original based on the electric signal, drive means for moving the means is provided, and an original feeding mechanism for conveying the original at a predetermined position and reading it by the light detecting means is provided. ,
A reflecting plate is rotatably provided on the optical path of the reflected light, and an adjusting plate movably attached in the moving direction of the light source is arranged so that one end of the adjusting plate comes into contact with one end of the reflecting plate. This is the configuration provided.

Therefore, in the above configuration, for example, when the light source and the light detecting means are stopped with respect to the original document and the original document is conveyed and copied, first, the angle adjustment is performed so that the optical axes coincide with each other. When the angle adjustment for maximizing the light amount is performed, the stop position of the light source and the light detecting means with respect to the document can be moved by moving the adjusting plate according to the rotation of the reflecting plate. It is possible to correct the deviation of the optical axis due to the angle adjustment that maximizes.

As a result, in the above-mentioned structure, since the deviation between the condensing position and the optical axis can be prevented, the amount of light reaching the light detecting means can be prevented from decreasing, and the reliability of the image data from the light detecting means is lowered. There is an effect that can be avoided.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an adjusting mechanism section and a perspective view of a magnification adjusting section in an electrophotographic apparatus of the present invention.

FIG. 2 is a configuration diagram of the electrophotographic apparatus.

FIG. 3 is a block diagram of copy control in the electrophotographic apparatus.

FIG. 4 is a configuration diagram of a scanning unit of the electrophotographic apparatus.

FIG. 5 is a cross-sectional view of the adjusting mechanism section and a side view of the magnification adjusting section.

FIG. 6 is a cross-sectional view of the adjusting mechanism section.

FIG. 7 is a perspective view of the magnification adjusting unit.

FIG. 8 is an explanatory diagram showing an adjusting method in the adjusting mechanism section and the magnification adjusting section.

FIG. 9 is a front view of an adjustment pattern used in the above adjustment method.

FIG. 10 is an example of a detected adjustment pattern in the above adjustment method.

FIG. 11 is an example of another detected adjustment pattern in the above adjustment method.

FIG. 12 is another example of the adjustment pattern detected by the above adjusting method.

FIG. 13 is still another example of the adjustment pattern detected by the above adjusting method.

FIG. 14 is a configuration diagram of a lamp adjusting mechanism in the electrophotographic apparatus.

FIG. 15 is a plan view of the lamp adjusting mechanism.

FIG. 16 is a block diagram showing control of each member in the electrophotographic apparatus.

FIG. 17 is a main-portion configuration diagram of a scan unit showing an adjusting method of the above-described lamp adjusting mechanism.

FIG. 18 is a graph showing the relationship between the output voltage of the CCD and the number of rotation pulses of the motor in the above adjusting method.

FIG. 19 is a configuration diagram of a main part of a scanning unit in the electrophotographic apparatus.

FIG. 20 is a main-part configuration diagram showing adjustment of the scan unit.

FIG. 21 is an explanatory diagram showing an adjustment method in the scanning unit.

FIG. 22 is an explanatory diagram showing another adjustment method in the scanning unit.

FIG. 23 is a main part configuration diagram showing another adjustment of the scanning unit.

FIG. 24 is a configuration diagram of a scanning unit in a conventional electrophotographic apparatus.

FIG. 25 is an explanatory diagram showing an optical adjustment method of the scanning unit.

FIG. 26 is an explanatory diagram illustrating optical axis adjustment in the scanner unit in the scanning unit.

FIG. 27 is a configuration diagram of a main part of the scanning unit including the ADF.

FIG. 28 is an explanatory diagram showing optical adjustment in the scanning unit.

[Explanation of symbols]

 2 Adjustment mechanism section (optical adjustment mechanism) 12 Magnification adjustment section (optical adjustment mechanism)

Claims (3)

[Claims] 1. A light source for irradiating an original with light, a light detecting means for detecting reflected light from the original and converting it into an electric signal, and an electronic device for copying the original on the basis of the electric signal. An electrophotographic apparatus, wherein the photographic apparatus is provided with an optical adjustment mechanism for adjusting the reflected light. 2. A light source for irradiating a document with light is provided, and light detection means for detecting reflected light from the document and converting it into an electric signal is provided, and the light source and the light detection are provided so as to scan the document. In the electrophotographic apparatus for copying the document on the basis of the electric signal, there is provided driving means for moving the means, and displacement means for displacing the light source with respect to the light detecting means in accordance with movement of the light detecting means. An electrophotographic apparatus is provided, which is provided with control means for controlling the drive means based on the electric signal to set a displacement position of the light source that maximizes the reflected light. 3. A light source for irradiating a document with light is provided, and light detection means for detecting reflected light from the document and converting it into an electric signal is provided, and the light source and the light detection are provided so as to scan the document. In an electrophotographic apparatus for copying the original based on the electric signal, drive means for moving the means is provided, and an original feeding mechanism for conveying the original at a predetermined position and reading it by the light detecting means is provided. A reflecting plate is rotatably provided on the optical path of the reflected light, and an adjusting plate mounted so as to be movable along the moving direction of the light source has its one end abutting against one end of the reflecting plate. An electrophotographic apparatus provided in the.