JPS6048033A - Optical device for copying - Google Patents

Abstract

PURPOSE:To form an original image on a photosensitive body clearly without any distortion by adjusting the running courses of an exposure lamp and at least either of reflecting mirrors at right angles to their running courses and also at mutually orthogonal directions. CONSTITUTION:The exposure lamp 1 and reflecting mirrors 2 and 3 are fixed to support bodies 46 and 47 and movable by a guide rod 48 and a guide rail 49 as shown by an arrow 50, and reflecting mirrors 9 and 10 are fixed to support bodies 51 and 52 and movable by a guide rod 53 and the guide rail 49 as shown by an arrow 50. The fitting hole 93 of a support member 91 which supports the guide rod 53 is formed thin and long in the right-left direction perpendicular to the moving direction of the reflecting mirrors 9 and 10, and the fitting hole 95 of the other support member 92 is extended thin and long in the up-down direction perpendicular to the moving direction. Therefore, the guide rod 53 is adjusted and fixed in parallel to an optical axis while confirming through a measuring jig, and a distortion-free original image is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an optical copying device with an exposure lamp and An optical copying device in which a reflecting mirror is moved.

FIG. 1 is a sectional view showing the entire transfer type electrostatic copying machine, which is the basis of the present invention and for explaining the prior art. A horizontal transparent plate 21 is fixed to the upper part of the fuselage 60. An original 22 to be copied is pressed onto the transparent plate 21 by a cover 23. An optical device 25 is provided to form an image of the original 22 onto a right cylindrical photoreceptor 24 . The optical device 25 includes an exposure lamp 1 that emits light toward the original 22, a reflecting mirror 2 that guides the light from the exposure lamp 1 to the original 22, a reflecting mirror 3 that reflects the original image,
9.10, a condensing lens 26, and a reflecting mirror 28 that guides the original image to the light beam M, 27 on the photoreceptor 24. Photoreceptor 2
A charging corona discharger 30 is provided around the photoreceptor 4 on the upstream side in the rotation direction 29 of the photoreceptor 24 . Exposure area 27
The electrostatic latent image formed in the magnetic brush developing device 3
1 is visualized into a toner image. Copy paper is on aircraft 6.
Paper cassettes (cassettes) 32, 33 attached to one side of the paper are selectively conveyed by feeding rollers 34, 35 and a pair of conveying rollers 36, 37, 38, and are further conveyed by the guide means 3.
9, the toner image is transferred onto the copy paper by a transfer corona discharger 40. In the vicinity of the transfer corona discharger 40, there is a rotation direction 29 of the photoreceptor 24.
An AC corona discharger 41 for static elimination is provided on the downstream side of the photoreceptor 24, and the copy paper is peeled off from the photoreceptor 24 and is conveyed to a fixing device +143 by an endless conveyor belt 42 to be fixed thereon. The body 60 is moved by the paper roller 44.
It is discharged onto a tray 45-H attached to the other side. Note that during exposure, the optical device 1125 excluding the lens 26 and the reflecting mirror 28 moves from the left side to the right side within the body 60 for exposure as shown by ymyts.

FIG. 2 is a perspective view of a prior art optical device 125, and FIG. 3 is a simplified partial perspective view showing its optical path. Exposure lamp l and anti-IR mirror 2, lj: fixed to support 46, 47, guide rod 48 and guide rail 4
9, it is horizontally movable in the direction of arrow 50.

The reflecting mirrors 9, 10 have mutually orthogonal reflecting surfaces and are fixed to supports 51, 52.

The support 51 is horizontally movable in the direction of the arrow 50 by means of a guide rod 53 . Another support 52r/i is supported by the guide rail 41C.

The support member 46fC1d1 driving member 54 hangs down and is fixed. A long hole 55 formed in this drive member 54 extends perpendicularly to the moving direction 50. A driving protrusion 56 fits loosely into the elongated hole 55 . The driving protrusion 56 is the sprocket wheel 5
7. Che 259 stretched horizontally and endlessly by 58
Fixed.

Pulley 6 integrally supported by fuselage 60 (see Figure 1)
1 and 62 and a pulley 63 supported on the support 51, wires 64 and 65 are spring-loaded. One wire 64
has one end fixed to the support 46 and pulleys 61, 62,
63 and the other end is fixed to the fuselage 60. One more
One end of the two wires 65 is fixed to the support body 46, and the other end is attached to the fuselage 60 after going around the pulley 63 about half way.

As a result, the reflector 9.10 is moved by M degrees half the exposure lamp l and the reflector 2,30. The state in which the exposure lamp 1 and the reflecting mirrors 2, 3; 9, 10 are moved from the rest position shown by the solid line in FIG. 1 to the extreme position for exposure is the first state.
It is shown in phantom in the figure.

Each end of the guide $48.53, s, is fixed to the fuselage 60 by a support part +, t 66 , 67 bent into an L-shape. The other ends of the guide rods 48 and 53 are commonly identified to the fuselage 60 by a support member 68. These support members 66
．． The mounting position of 67.68 cannot be adjusted for displacement,
Therefore, depending on the installation fA, the guide rods 48, 53 may not be parallel to the optical axis 71. As a result, as will be described later, the original image formed on the photoreceptor 24-1 becomes unclear, distorted, or blurred.

FIGS. 4 and 5 are simplified plan views of the optical device 25 showing the optical path when the optical axis is not parallel to the optical axis in the horizontal direction. Referring to Figure 4, the image of the portion P of the document 22 to be imaged passing through the optical axis 71 of the lens 26 follows the optical path portions 73 and 74. It is assumed that the axis perpendicular to the reflecting mirrors 9 and 100, that is, the guide rod 53, is deviated by an angle θ from a straight line 71a parallel to the optical axis 7e and therefore the light 1llllII71. Referring to FIG.
The reflected light path 73 of the portion P of the document reflected by the reflector 3 when moved correspondingly for the light is subscript a
~d is added. In this way, the light Il of the lens 26
The light path portions 73a to 73d following l
As a result, only 1-image distortion occurs.

Further, the development of distortion in a lun image will be described in detail using FIGS. 6 to 8. ! , referring to the f+6 diagram, form party 1
．． When exposure is performed on the photoreceptor 24 over a length t along the rotation direction 29 through the slit formed by the ijL material 79, the guide rod 53
1, the portion 22a of the original 22 moves in the direction of arrow 80.

Therefore, as shown in Figure 7 (1), IfA 22
When the portion 22a has a width a, the guide rod 53 is not parallel to the optical axis 71, so it is equivalent to the arrow 80.
direction (see FIG. 6) during slit exposure, thereby forming an image 81 on the photoreceptor 24 as shown in FIG. 7(2). This original image 81 is based on the system bar 5.3.
During slit exposure, the exposure lamp l and the reflecting mirror 2, 3; 9, 1
As the 0 moves, it moves in the axial direction of the photoreceptor (to the right in FIG. 7(2)), and the exposure opening of the document 22 passing through the slit becomes longer than the normal exposure opening. Therefore, the original image 81 appears to be "shifted", and both 41 and 82.83 points in the axial direction of the photoreceptor 24 become unclear. Moreover, if the guide rod 53 is parallel to the optical axis 71, the photoreceptor 24
7 (2) along the rotation direction 29 perpendicular to the zero rotation axis
The original image 81 to be formed above and below is part 1 as shown in the figure.
This results in an inclination with respect to the direction of rotation 29 perpendicular to the line III of the sixth light beam 24.

For this reason, the character rAJ drawn on the original document 22 shown in FIG. 8(1) has an irregularity at both ends 85 and 86 in the axial direction of the photoreceptor 24, as shown in FIG. 8(2). ．． QI
He becomes a man, and what's more, he becomes a distorted image 84.

FIG. 9 shows that the guide rod 53 is at the base 11i111 in the vertical direction.
71 (not shown) is a new view of the optical device 25 showing the optical path when the optical path is not parallel to the optical device 71 (not shown). When the rod 53 in the system is parallel to the optical axis 71, the exposure lamp 1, the reflector 2.3;
When slit exposure is performed by moving from the position i shown by the thick line to the position shown by the imaginary line, the exposure lamp 1,
Reflection solutions 2, 3; 9, 10 move to which position mJ t, the table of the photoreceptor 24 indicated by reference numeral 69...'' position idK
A statue of Kabuto 22 will be formed in January. However, guide rod 5
3 is not parallel to the light 1lIII 171 as shown in FIG. 9, the optical path time changes. FIG. 10 is a dark version of FIG. 9, and will be described in detail with reference to this figure. When the guide rod 53 is parallel to the optical axis 71, the lens 26
When the guide rod 53 is no longer parallel to the optical axis 71, the optical path length changes, and the optical path length changes when the guide rod 53 is no longer parallel to the optical axis 71. The reference numeral 77 and the indicated position are 1α. Therefore, the exposure lamp 1, the reflecting mirrors 2, 3; 9, 10 are in the virtual line 11
When the VC is in the target position, the image forming position is a position 70 that is shifted from the normal image forming position 69 in the radial and circumferential directions of the photoreceptor 24.
Therefore, the B image becomes an indistinct whale that is out of focus along the direction of exposure movement.

The influence of these mounting errors is due to the location near the lens.
The reflective mirror that
If the four reflecting mirrors are rearranged and moved integrally by intersecting each other by +M, the error will be greatly increased.

To provide an optical copying device capable of forming a target IyA original image of 11Uj on a photoreceptor clearly and without distortion.

FIG. 6511 is a perspective view of an optical device 25 according to an embodiment of the present invention. Parts of this embodiment that correspond to the prior art described above are given the same reference numerals. It should be noted that the guide rod 48 is supported by the supporting capital side 66 and the supporting capital side 90;
The other guide rod 53 is supported by support elements 91.92.

The support member 66.90 supporting the guide rod 48 is attached to the fuselage 60.
(not shown).

The support ft14'j49i that supports the guide rod 53 is housed in the fuselage 60 as shown in FIG. The attachment hole 93 is elongated along the hand +iiJ and rear side of the body 60 (in the direction perpendicular to the plane of the paper in FIG. 1, and in the direction extending to the upper right and lower left within the paper space in FIG. 11). A mounting bolt 94 fits into this mounting hole 93.

The other support member 92 also has a housing hole 95 through which a bolt to be housed in the fuselage body 6o is inserted. This mounting hole 95 is formed in the vertical direction of the body structure 60 (-
L (toward the lower blade) K is long and narrow.

In the fuselage 60, the guide rod 53 is aligned half a line with the optical axis 71: J
(Jj is to be done!; K is to be. In other words, the support 4' member 91 is adjusted and displaced to the flat curve of one rock and the rear side, which is 1 μfqt for the guide rod 48, and this The support cap 92 is adjusted and displaced in the vertical direction of the tsukiba 60, which is perpendicular to the light/cup 71 of the guide 7 body 48, and the adjusted liquid level direction of these support IHIX materials 91 and 92 is adjusted.
iJ are mutually perpendicular. This makes it possible to move the guide rod 53 parallel to the optical axis 71 while checking the guide rod 53 in the alt position with the measuring jig. Therefore, it is possible to form a clear and undistorted original image on the single peak light beam 24.

13 is a perspective view of another embodiment of the support means 96 according to the invention for supporting the end of the guide rod 53; FIGS. 14 and 15 are FIGS.
lJXIY-XIV Oyo U X'i -XV Color uf
It is a clRi surface view. With reference to these figures, the support gls material 97 of the support means 96 includes a support portion 98 and side portions 99.1.
00 and installation <IOL. The support portion 98 is formed with an insertion hole 10'2 through which one end of the guide rod 53 is smoothly inserted. Identification bolt IO screwed into side part 99: 1
．． J: Abuts on the outer circumferential surface of the end of the inner east rod 53, thereby allowing the guide #53 to be pressed against the end of the insertion hole 102 and fixed to the support member 97. The fuselage 6 is attached to the mounting part 101.
A mounting hole 104 is formed extending from the 0th hand +ifJ to the rear side or extending upwardly and downwardly. This mounting hole 104
At this time, the mounting bolt 105 is screwed into the body 60. A raised portion 106 formed on the side portion 99 has an internal thread 10.
7 is formed. This internal thread l 07Kld style f'
The external thread 109 of the E-bolt 108 is screwed together. The end of the adjustment bolt 108 passes through a bracket 110 that is fixedly attached to the fuselage 60'. An E-ring 1 is attached to one end 111 of the adjustment bolt 108 on both end faces of the bracket 110.
12 and 113 are fitted, and this causes the adjustment bolt 1
08 in the -m line direction is prevented. Adjustment Pol) 1
By displacing the support part 97 by a full angle of 0'8, it is possible to adjust the displacement of the support part 97 in the extending direction of the mounting hole 104. Supporting means 96 having any of the configurations shown in FIGS. 13 to 16 can be implemented in place of the aforementioned supporting members 91 and 92 for supporting both ends of the guide rod 53. The guide rod 53 can be finely adjusted accurately by operating the adjustment bolt 108, and therefore, it is possible to make the axis of the guide rod 53 parallel to the optical axis 71.

Regarding the horizontal direction, the support member 91 has vertical +14 +M
'' can be adjusted 6171 times by the support member 92.

As another embodiment, the proposal (c) is discussed using only the guide rod 53, but the guide rod 48 may be adjusted d1A in the same way. However, a +nN alignment of the guide rod 53 is more preferred. In the embodiment, the guide rod has been described as having two trees, but it may also have one tree.

Figure q516 is a perspective view of the holding plate 140 used for focusing the optical device 25. This +Y holding plate 14
0. The transparent plate 21 is replaced with the transparent plate 21 for focusing, and the transparent plate 21 is installed in the aircraft body 60. This holding plate 140 includes an exposure rung 1, a reflecting mirror 2.3;
An elongated adjustment hole 141 is formed along the direction 50 of the movement.

The dimensions and shape of the holding plate 140 are the same as those of the transparent plate 21.

FIG. 17 is a perspective view from below of the focusing indicator 142 according to the present invention. This display 142 has a box 143, and a display board 144 is housed facing downward. The display concave in the F direction of the display board 144 projects from the upper surface of the transparent plate and the holding plate 140, that is, the plane on which the original is to be copied, and is displayed horizontally in FIG. 18. be celebrated. The display surface of the display board 144 protrudes from the plane on which the IF record is to be copied, and in this embodiment extends obliquely to one side. Reference display 145aij approximately in the center of the display surface of display board 144 in the left-right extending direction in FIG. 18: within 1,000 liters of the original to be copied. The left and right portions of the reference display 145a of the display 145 in FIG. 18 are located above and below the area 1111 of the original to be copied, respectively.

A protective plate having the same texture and thickness as the transparent plate is housed at the bottom of the Haku clamp.
In addition to being able to obtain the same optical characteristics as the transparent plate described above, it also prevents the display amount of the display plate 144 from being contaminated by dust or the like.

Holding pieces 146 and 147 are fixed to the clamp 143. The holding pieces 146 and 147 come into contact with the upper part of the holding plate 140. The housing 143I'i can be bottomed into the adjustment hole 141.

Instead of the display 145, as shown in FIG.

In this way, it is possible not only to focus the guide rod 53 parallel to the optical axis, but also to focus in the direction of the optical axis and half.

FIG. 19 shows a focus display 142 on a holding plate 140.
FIG. Haku Clamp 143
Insert adjustment hole 14111fM, holding pieces 146, 147
is in contact with the upper surface of the holding plate 140, the display plate 14
The display surface 4- intersects with the upper side of the holding plate 140, which is on the same plane as the plane on which the original is to be copied. f like this
4JJ19 When a print button (not shown) provided on the machine 60 is operated to make a copy in the state shown in FIG. 4JJ19, the display 145 on the display board 144 is copied onto the copy paper after copying is completed. Among the many displays 145 when looking at this copy image,
It is possible to judge which one display is clear and in focus. The display 145 is marked with "0" to "±5" as shown in FIG. Therefore, after confirming the sign of the clear display 145 that is in focus, move the display 142 along the adjustment hole 141 and operate the print button again at the correct position to make a copy6. Read the code on the display 145 that matches. In this way, the aforementioned support member 92 is enshrined so that the in-focus display 145 coincides even at mutually different positions vζ of the display 142.゛Also, by repeating such adjustment 1 to 1, the base 1 dollar display 145a on the 1,000th page of the original to be copied is clearly copied and focused, and the support member 92 is adjusted to 1 to 1. Arrange. In this way, the guide rod 53 is moved to the optical axis 71. l! : Make the images parallel and finish the focusing process.

FIG. 20 is a perspective view of a retaining plate 148 according to another embodiment of the present invention. This holding plate 148 includes the exposure lamp 11 reflecting mirror 2,
3; Along the moving direction 50 of 9, 10 -CG lever adjustment hole 1
49, as well as fields extending perpendicular to their movement direction 50 ■ hole preparation 150 and other places! iMK has adjusting holes 151 and 152 provided as appropriate. The display 142 is fitted into these adjustment holes 149 to 152 to perform copying and focusing operations.

As described above, according to the present invention, it is possible to form a single mouse image on the photoreceptor without distorting the MA# brightly.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing the entire transfer type electrostatic copying machine that is the basis of the present invention and for explaining the prior art, FIG. 2 is a perspective view of the optical device 25 of the prior art, and FIG. FIGS. 4 and 5 are simplified partial perspective views showing the optical path, and are simplified views of the optical device 25 showing the optical path when the guide rod 53 is not parallel to the optical axis 71 in the horizontal direction. Planar views, Figures 6 to 8 are diagrams for explaining image distortion development, Figure 9
The figure shows the optical path when the guide rod 53 is not parallel to the optical axis 71 with respect to the vertical plane. , 25 cross-sectional view, 1st
0 is a diagram of FIG. 9 converted into a blood circuit, FIG. 11 is a perspective view of the optical device 25 according to an embodiment of the present invention, and FIG. 12 is a diagram of the support member 91.
, FIG. 13 is a perspective view of another embodiment of the support means for supporting the guide rod 53, and FIG. 14 is taken along the section line X in FIG. 13.
A cross-sectional view as seen from IV-11v, FIG. 15 is a cross-sectional view of FIG. 13.
The figure is a perspective view of the holding plate 140 used for focusing the optical device 25, and FIG. 17 is a perspective view of the focusing indicator 14.
2, FIG. 18 is a curved diagram of the display device 142, and FIG. 18A is a flat curved diagram of the display device 142 in which the display 160, which is another embodiment of the display 145, is shaped like +i. 1st
FIG. 9 is a cross-sectional view showing the state in which the focusing display J4.142i is mounted on the holding plate 140, and FIG. 20 is a perspective view of the holding plate 148 according to another embodiment of the present invention. l...Exposure lamp, 2,3;, 9.10...Reflector, 22...Original, 25...Optical device, 26...Lens, 48.53...Guide rod, 49...・Guidance rail,
91, 92.97...Supporting member, 93.95...Adjustment hole agent Patent attorney Keiichi Kyoichi section δ 20th (1) (2) Fig. 13 Fig. 14

Claims (4)

[Claims] (1) It includes an exposure rung that irradiates light onto the Ig manuscript, a reflector that gives the impression of the original, and a lens that focuses the light from the reflector onto a photoreceptor, and runs between the exposure lamp and the reflector. In a copying optical device that moves to expose a slit, the traveling path of at least one of the exposure lamp and/or the reflecting mirror can be adjusted in adjustment directions that are perpendicular to the traveling path and perpendicular to each other. Characteristic optical device for copying. (2) The exposure lamp and/or the reflector are guided by a guide rod extending along the traveling direction, and the guide rod is movable in the adjustment direction by means of supporting means that supports the end of the guide rod. An optical apparatus for copying according to claim 1, characterized in that: (3) The optical apparatus for copying according to claim 2, wherein a plurality of reflecting mirrors are provided in the optical path, and the reflecting mirror closer to the lens is guided by an adjustable guide rod. (4) The copying optical system according to claim 2 or 3, wherein the reflecting mirrors guided by the guide rod are a pair of reflecting mirrors having reflecting surfaces perpendicular to each other. Device.