JP3486780B2 - Image forming device - Google Patents

Description

Detailed Description of the Invention

[0001]

The present invention relates to an exposure lamp for exposing to move the document on the fixed platen, about images forming apparatus having a plurality of reflecting mirrors and the imaging lens.

[0002]

2. Description of the Related Art In a copying machine of an image forming apparatus,
Generally, an exposure lamp that exposes from a lower surface of a fixed document table on which a document is placed and a first scanner unit that incorporates a first reflection mirror; and a reflected light from the first reflection mirror, and sends the reflected light to an imaging lens. A second scanner unit incorporating V-shaped second and third reflection mirrors is movably fitted directly to the guide member. For example, there are JP-A-60-163449 and JP-A-61-201229. When the moving speed of the first scanner unit is 1, the moving speed of the second scanner unit is moved at 1/2 speed. And particularly the first scanner unit and the second scanner unit
When the scanner unit is driven only on one side, the first and second scanner units are incorporated in the guide member having a large diameter in a penetrating state in order to prevent the first and second scanner units from moving and shaking. There is. Therefore, when incorporating the first and second scanner units into the main body of the copying machine, the first and second scanner units are inserted through the guide member before being incorporated into the main body of the copying machine.

[0003]

[0004]

As described above, after the plurality of scanner units are passed through the guide member having the large diameter,
The plurality of scanner units are incorporated into the main body of the copying machine together with the guide member. Since the scanner unit incorporated in this way cannot be adjusted, the scanner unit is incorporated after adjusting the positional relationship with the guide member before the incorporation. However, in the case of the exposure optical system of the copying machine using the fixed document table, since the image carrier is exposed while moving the plurality of reflecting mirrors together with the exposure lamp, even after the adjustment as described above. Although it becomes necessary to make some fine adjustments, adjusting the position of the guide member having the large diameter is an extremely skill-intensive operation, and therefore, there is a drawback that adjustment takes time and further accurate adjustment cannot be performed. .

The present invention, in order to improve such drawbacks, an object of <br/> Rukoto be adjustable even after attaching the scanner unit.

[0006]

To achieve the above object, the present invention provides a fixed document table on which a document is placed, and an exposure lamp for exposing and scanning the document on the fixed document table together with a moving optical system. An image forming apparatus having an image forming lens for forming an exposed original image, the first scanner unit having the exposure lamp and the first reflecting mirror, and being guided and driven by a guide member and one side driving means, The reflected light of the first reflection mirror is received and the reflected light is sent to the imaging lens 9
A second reflecting mirror having second and third reflecting mirrors formed at 0 ° , and guided and driven by the guide member and the one-sided driving means.
It consists of a scanner unit, the first scanner unit mounting member and the second scanner unit attachment member fitted movably in the guide member, taken the first scanner unit
The first scanner unit and the second scan unit are attached to the attached member.
The second scanner unit as a main unit attachment member
Each of the first scanners is detachably and adjustably attached.
The unit is provided on the first scanner unit mounting member.
Rotate around the reference pin and finely adjust the first scan
The unit is fixed to the mounting unit. The purpose
In order to achieve
The manuscript table and the manuscript on the fixed manuscript table together with the moving optical system
An exposure lamp that moves and performs exposure scanning, and an exposed original image
In an image forming apparatus having an imaging lens for imaging
The exposure lamp and the first reflection mirror,
First scanner unit guided and driven by a material and one-sided driving means
The knit and the reflected light of the first reflection mirror are received to form the
The second and third parts formed at 90 ° to send the reflected light to the image lens
A reflecting mirror, the guide member, and the one-side drive means.
Second scanner unit guided and driven by the above-mentioned plan
Mounting the first scanner unit that is movably fitted to the inner member
Consisting of a member and a second scanner unit mounting member,
The first scanner unit is attached to the first scanner unit mounting member.
Put the knit on the second scanner unit mounting member
2 Scanner units can be attached and detached individually for adjustment.
And the second scanner unit is attached to the second scan unit.
Movement of the second scanner unit with respect to the mounting member
Fine adjustment in the direction to the second scanner unit mounting member
The configuration is fixed.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram of the entire image forming apparatus. An apparatus 5 is a cleaning apparatus provided with a cleaning blade 6 for removing the toner remaining on the photoconductor drum 1. The above apparatus is integrally formed, and an image forming apparatus 7 is provided.
Is detachably provided on the upper frame body 7a. Further, a document table glass plate 8 which is a fixed document table for placing a document on the upper frame 7a, and a document retainer for holding the document when the document D is placed on the document table glass plate 8 The plate 9, an exposure lamp 10 which moves to a lower position of the original platen glass plate 8 in the upper frame 7a by guide rails (not shown), respectively, and an integral movement of the exposure lamp 10 The first reflecting mirror 11 and the first reflecting mirror 11 which receives the reflected light emitted from the exposure lamp 10 onto the document D and projects the reflected light onto the image forming lens 12 are integrally formed at 90 °. A second reflection mirror 15 is provided, which is composed of second and third reflection mirrors 13 and 14, and further irradiates the surface of the photosensitive drum 1 to form an electrostatic latent image. The fourth reflection mirror 15 is rotatably provided on a mirror unit 15A by a shaft 15B, and an arm 15C extended from the mirror unit 15A is provided with an actuator 15D by a screw so as to be adjustable. Meanwhile, the light shield 7
The tip of the actuator 15D is brought into contact with the cam member 15E provided in h, and the fourth reflecting mirror 15 is moved by the movement of the mirror unit 15A.
Change the angle of.

Reference numeral 16 denotes an exhaust fan for discharging ozone and heat generated in the image forming apparatus 7 to the outside, which is provided with a suction port 17 through which the toner and the band electrode 2 scattered from the developing device 3 are sucked. The generated ozone or the like is discharged to the outside through the ozone removal filter 18. On the other hand, the heat of the exposure lamp 10 generated in the optical system is discharged to the outside from the suction port 19 formed in the light shielding plate 7b for shielding the optical system.
The reflecting mirrors 13 and 14 formed at 90 ° with respect to the moving distance of the first reflecting mirror 11 are moved by a guide member (not shown) at a distance of 1/2, so that the original D and the photosensitive drum 1 are always moved.
The optical path length to the surface is constant. All the above mechanisms are provided in the upper frame 7a.

Reference numeral 20 denotes a paper feed cassette that is provided at a lower position of the lower frame 7c of the image forming apparatus 7 and stores the recording paper P. The recording paper P provided in the paper feed cassette 20 is pressed by a spring 21 by a pressing plate 22. The front part in the paper feed direction is pushed up via the uppermost paper, and the uppermost recording paper P is fed by the half-moon shaped paper feed roller 23, and the recording paper P is fed and conveyed by the conveyance roller 24 and the conveyance guide unit 25. The recording paper P that is conveyed to the guide unit 26 is temporarily stopped by the recording paper stop member 27 at the paper feed / conveyance guide unit 26, and the paper feed is started so as to match the toner image formed on the surface of the photosensitive drum 1. Then, the toner image is transferred onto the recording paper P by the transfer pole 28, separated from the surface of the photosensitive drum 1 by the separation pole 29, and then the thermal fixing device.
After fixing at 30, the paper is discharged to the paper discharge tray 31. Reference numeral 32 denotes a manual feed tray, which is a manual feed roller 33 for feeding the recording paper P1 on the manual feed tray 32 one by one.
Is fed to. S1 and S2 are conveyance guide portions 25 for the recording paper P.
And a sensor provided in the paper feed / conveyance guide unit 26.

The upper frame 7a and the lower frame 7c are openable from the front side.

FIG. 2 shows an upper frame 7 showing an embodiment of the present invention.
In an exploded perspective view of the optical system in a, a guide member 101 is provided on the entire upper frame 7a shown in FIG. 2 in the moving direction of the exposure lamp 10 and the first reflection mirror 11. Reference numeral 102 denotes a first scanner unit, and the exposure lamp 10 and the first reflection mirror 11 are provided on the first scanner unit 102 as shown in the figure. On the other hand, a first scanner unit mounting member 103 is movably fitted to the guide member 101, and one end of the first scanner unit 102 is fixed to the first scanner unit mounting member with screws 104 and 105. . The other end of the first scanner unit 102 has the guide member 101.
It is placed on an auxiliary guide member 106 provided in parallel with. 107
Is a second scanner unit, which is provided with reflecting mirrors 13 and 14 formed at 90 ° as shown. Further, a reinforcing member 107A is formed in the moving direction between the V type reflection mirrors 13 and 14 provided in the second scanner unit 107. On the other hand, a second scanner unit mounting member 108 is movably fitted to the guide member 101, and one end of the second scanner unit 107 is fixed to the second scanner unit mounting member 108 with screws 109 and 110. To do. The first scanner unit 102 is moved by 1 and the second scanner unit 107 is moved by 1/2, so that the first scanner unit is attached as a means for maintaining the optical path length with respect to the image carrier 1. A part of the wire 111, which is a driving means, is fixed to the member 103, and the wire 111 is suspended and operated by a pulley 112 provided on a part of the second scanner unit mounting member 108. The first scanner unit 102 is replaced with the first scanner unit 102.
When the screws are attached to the scanner unit mounting member 103 with the screws 104 and 105, the reference pin 103A provided on the first scanner unit mounting member 103 is fitted into the reference hole 102A formed in the first scanner unit 102, and the reference hole 102A shown in FIG. As shown, the adjustment protrusions 102B and 102C formed by the first scanner unit 102 are abutted against the reference wall 71a provided on the inner wall of the upper frame 7a, and the first scanner unit 102 is centered around the reference pin 103A.
After rotating and finely adjusting, screw 104,1 as shown in FIG.
Fix at 05.

Further, as shown in FIG. 2, the second scanner unit 107 is attached to the second scanner unit mounting member 108.
When the screws 109, 110 are attached to the reference pins 108A, 108B formed on the second scanner unit attaching member 108,
Reference holes 107B and 107 formed in the second scanner unit 107
C is fitted and as shown in FIG. 1, the second scanner unit
After finely adjusting 107 in the moving direction with respect to the second scanner unit mounting member 108, the screws are fixed with the screws 109 and 110.

FIG. 3 shows that when the image forming apparatus 7 is transported and moved,
A lens unit 1 incorporating the first scanner unit 102, the second scanner unit 107, and an imaging lens 12.
2A and a mirror unit 15A provided with a fourth reflecting mirror 15
Is a means for fixing and locking the and in the upper frame 7a. At that time, the actuator 15D is separated from the cam member 15E.
First, the first scanner unit 102 is moved to the inner wall position of the upper frame 7a, which is the non-operating position as shown in the figure, and the abutting portion 102D and the protruding portion 102E are formed on a part of the first scanner unit 102. This portion 102D is fixed to the inner wall surface of the upper frame body 7a with a butting screw 113 from the outer side surface of the upper frame body 7a. The protrusion 102E is also fixed by screws 114 from the outer side surface of the upper frame 7a. At that time, the second scanner unit 107 is connected to the wire 111.
And the pulley 112 are actuated to move to the inner wall surface of the upper frame 7a at the same time, and the engaging member 102F formed on the first scanner unit 102 is provided at the non-driving end of the second scanner unit 107. Lock to 107D. Further, the protrusion 102
A protrusion 102G is formed together with E so that the protrusion 102G abuts against the upper inner wall of the upper frame 7a when vibrating to prevent large swing even when the screw 114 is not fixed.

Further, after moving to a non-actuated position on a fixed portion 12B formed on the lens unit 12A, it is fixed in the upper frame 7a with a screw 115 from the outer side surface of the upper frame 7a, and
The mirror unit 15A is also fixed in the upper frame 7a from the outer side surface with screws 116.

[0015]

As described above, according to the present invention, the adjustment can be performed even after the scanner unit is attached, and the adjustment can be performed accurately in a short time.

[0016]

[Brief description of drawings]

FIG. 1 is a front view showing the overall configuration of an image forming apparatus according to the present invention.

FIG. 2 is an exploded perspective view showing an optical system according to the present invention.

FIG. 3 is a plan view showing a configuration for fixing an optical system according to the present invention.

[Explanation of symbols]

1 photoconductor drum 2-band electrode 3 developing device 6 cleaning blade 7 Image forming device 7a Upper frame 7c Lower frame 20 paper cassettes 25 Transport guide section 26 Paper feed guide section 101 Guide member 102 1st scanner unit 103 First scanner unit mounting member 107 Second scanner unit 108 Second scanner unit mounting member

Claims (3)

(57) [Claims] 1. A fixed document table on which a document is placed, an exposure lamp for exposing and scanning the document on the fixed document table together with a moving optical system, and an imaging lens for forming an image of the exposed document. An image forming apparatus having: a first scanner unit having the exposure lamp and a first reflecting mirror, which is guided and driven by a guide member and one side driving means; and an image formed by receiving reflected light from the first reflecting mirror. Having second and third reflecting mirrors formed at 90 ° for sending reflected light to the lens, the guide member, the second scanner unit guided and driven by the one-side drive means, and movable to the guide member. comprises a first scanner unit mounting member and the second scanner unit attachment member mated, the first scanner unit
Mount the first scanner unit to the second mounting member.
Attach the second scanner unit to the canner unit mounting member.
Each is detachably and adjustably attached to
The can unit is attached to the first scanner unit mounting member.
The first pin is rotated by rotating the provided reference pin as a center and finely adjusted.
An image forming apparatus fixed to a can unit mounting member . 2. A fixed document table on which a document is placed, and the fixed document table.
The original on the platen is moved together with the moving optical system for exposure scanning.
Exposure lamp and an imaging lens that forms the exposed original image.
And an exposure lamp and
And the first reflecting mirror, and the guide member and the one-sided driving means.
A first scanner unit driven by a guide and the first counter unit.
Receives the reflected light from the reflecting mirror and sends the reflected light to the imaging lens.
With second and third reflecting mirrors formed at 90 °
The guide member is driven by the one-side drive means.
Second scanner unit and movably fitted to the guide member
Combined first scanner unit mounting member and second scanner
The first scanner unit is composed of a unit mounting member.
Mount the first scanner unit to the second mounting member.
Each of the second scanner units is attached to the canner mounting member.
Removably and adjustably attached, the second scanner unit
With respect to the second scanner unit mounting member,
The fine adjustment is performed in the moving direction of the second scanner unit, and
Images forming device you characterized in that it is fixed to the second scanner unit attachment member. Wherein the first image forming apparatus according to claim 1, characterized in that positioned adjusted by being abutting the scanner unit in a part of the image forming apparatus main body.