JPS6070430A - Electrophotographic copying machine - Google Patents

Abstract

PURPOSE:To run copying paper along this side of an operator by moving an original in the direction vertical to an optical axis in accordance with its width, and constituting a titled machine so that a lens always sets a position in which its optical axis passes through the center point in the width direction of the original in that case, as a reference position. CONSTITUTION:In case of copying an original b' whose size is small, the original b' is placed on the operating side on a platen glass 1, namely, the side shown by a figure M to match the edge part. When an original size designating key is depressed, a control device operates, a lens is moved by a distance (e) at right angles to the optical axis, and moved to a O' point from a O point. The O' point is a point in which an optical axis a' of a lens 7' placed there passes through the center c' of a width of the original b'. An original image b'' projected onto a photosensitive drum 9 by such a lens 7' is formed on the operating side on the photosensitive body.

Description

[Detailed description of the invention]

INDUSTRIAL APPLICATION FIELD OF THE INVENTION The present invention relates to an electronic printing machine that exposes an optical image of a manuscript to form an electrostatic latent image 7 and develops the electrostatic latent image of the mouth with fine particles. . Prior art electronics The exposure methods used by Masakura Jadaiso include a slit exposure method in which a partial image of a document is projected through a slit and continuously projected onto a rotating photoreceptor drum, and a method in which the entire document is projected onto a photoreceptor at a time. It can be roughly divided into the full exposure method and the full exposure method, but each method has a
, the surface of the original placed on 1! ＋）Their reflection'if dies χ
An optical system is provided for sending the image through the photoreceptor surface, enlarging or reducing it at the same magnification, and focusing the image on the photoreceptor surface. FIG. 1 shows the interchangeable machine Z of the Surin I/exposure method, which is the most widely used conventional method. Ol is a platen glass,
Top 11] Placed on i) A

[1m Y02 & 1st obstruction light 03 ℃ switch I] cut into l・f;
While scanning, the reflected light from the mirror 04, 05, 06, lens 07, and mirror 08 passes through the optical system and forms an image on the photoreceptor drum 09. This image was developed and imaged using the developer Pegari 010, and the legend is that
o 11 Greetings from the scabbard sword set 012,
In group, Jt1 Kori Tawara Paper is fixing device 013'l in transfer H!
1' and output it to the paper output tray 014. And the person who operates it in a similar way, for example, moves it to the front, that is, the
g- Perform the operation while standing in such a position that the paper moves from the bottom of the person to the left. In addition, when changing the magnification, use the mirror 0 as shown by the dotted line.
5.06Y shift fJJra and change the optical path length by 1 and L/
y'XO7 to change the position of the lens within the optical path. FIG. 2 is a drawing that simply shows the principle of the optical system Ic of the above-mentioned copying machine, and corresponds to the drawing seen from the right side of the copying machine Z in FIG. 1. In FIG. 2, the left side indicated by M is the operation side, and the operator stands on this operation side and performs various operations such as placing IJt Fm O2 on the platen glass 01. In conventional equipment, the lens 07 is shown in Figure S') vc
1. The base axis a is located at a position such that its original axis a approximately coincides with a line connecting the center point C of the maximum document width on the platen glass and the center point d of the width of the photoreceptor. ing. 1. Originals with a width smaller than the maximum original width on such compatible machines. For example, if you are trying to copy a B5 size original whose largest size is J-sized A3, from the viewpoint of original operation, the original with a small opening B' should be placed on the platen glass with the edges aligned according to the first operation rule. It is convenient to place it on the 01 and operate it in front of one operator. However, when the original is arranged in this way, the image 1. As shown in Figure 1, II forms an image on the side opposite to the operation side. Therefore, if the size of the image 6'' is large, the small size ct) y double paper that matches the actual size is also the opposite of the operation IH 11 + 11], that is, the operator will not be able to move towards the back. , C
Hold 1 bale of paper with ruri f, -1'l\back L 1
In this case, the operator has to reach out with the T at the back to remove this malfunction, which makes the work difficult. According to the object of the invention and therefore the object of the invention, when placing an original with a size σ smaller than the maximum original size, the operator immediately places the original document on the original placing table on the front side VC, and revenge
The Li paper also offers electronic tiles with a ↓÷ line. Zukori 4σ Noi S - In order to achieve the goal of success, Akira Fuzuko VC: Rai or,
Lens Z return: Ji L bends to the original σ angle J: then moves the lens in a right angle direction, and the lens always moves to the position where the original axis of warpage follows the center point 2 in the width direction of the document at that time. Align it with the reference position. By doing so, the original I placed on the original placing table in front of the operator.
Since the image of is formed on the S photoreceptor in front of the operator, the reciprocating paper also travels in front of the operator. Figure 3, which explains the optical system of this embodiment, is similar to Figure 2 which explains the optical system of this embodiment, and shows a glass platen glass, 7 a lens, and 9 a photosensitive drum. When copying the largest original by inkstone, the position of the lens 7cv remains the same as in the conventional apparatus shown in FIG. f, that is, a line 62 connecting the center point C of the maximum width of the original 2 and the center point d of rl-+ of the photoreceptor 62 is located at the position of the elemental axis. At the side meeting where small-sized manuscript b' is torn, manuscript h'
Y 7-5' The edge i on the operating side of the glass l, that is, the side marked M in the drawing! A! At this time, the lens 7 is also moved from the ico point perpendicular to the optical axis to the 0' point. Point 07 is a point where the optical axis α' of the fLk lens 7' passes through the center C' of the first frame of the original 2'. The original image 75 II to be printed is formed on the operating side of the photoreceptor, unlike the conventional apparatus shown in FIG.
' rlj5 A and -A If the distance C and Yx of the lens 7 are constants, W is a constant determined by the type of copying machine, so once A is determined, the distance C is Therefore, a document size designation key 7 is provided on Enokiiso, and when the key 2 is pressed, the control device is activated and the lens is moved by a distance C in a direction perpendicular to the lens 'a'-X axis. is extremely simple. The above is a case where the same magnification is used, that is, the magnification lσ) and the magnification H-1. However, the case where the magnification is not 1, such as reduction or enlargement n, will be described next. FIG. 4 shows the optical system shown on the left side of FIG. 3, that is, the lens 7 moved from point O to point O'.
The original axis a' at this c/) is the maximum original value g, light 1 of ff5
It has moved in parallel from tta to the front side by □. Point 0' corresponds to point O' in Fig. 3, and is the lens position when the same magnification is N. The original at this time (1) is indicated by line segments E and E2, and the image is indicated by the scarlet segment B2/ B, / is indicated by 1t. The distance between the original lenses is equal to the distance between the lens and the image, and 2f (Cf is the focal length of the lens). Magnification m ct) When performing reduction or enlargement,
The optical path length χ(1 m)", must be increased by f...and moved by (1-m) f along the original axis. That is, as shown in FIG. and move the lens position YO from point 7 to point 07 (the figure shows m (1, i.e., 2 in the case of reduction). At this time, the image is a2'c, 'VC' is 0 and 1.
In the case of the slit exposure °C method as shown in Fig. 1, instead of retracting one document Z, the VC mirror 05.06' (as shown between points J) is retracted. As shown in the figure, O and I occupy positions 7 that are symmetrical with respect to the original axis a'.Therefore, even with this alone, the grudge copying fiber will perform a grudge copying operation + kllll begging run, but in addition, the position of the stiff image 2 By displacing only A toward the operation side, 1 the edge of the image on the operation side II!!
! It is preferable to align the light body σ) with the edge of the operating side, or from the standpoint of positioning the covering paper. This operation of σ is well known as corner registration, and moves the lens from point O''' to point 07' at right angles to the original axis.The distance y of movement of the lens at this time (Ct) is given by triangle 02B2' From the geometrical conditions for Operation +1
(After aligning the edges with II and placing it on the lens, first place the lens at its maximum original position, and set the standard on the original axis a', which is displaced by 10 - from the i-axis a when shooting at the same magnification, toward the operating side. move to position,
Then, depending on the magnification m and original 1, srl] A -102-
Correct the position 2 (1+m) in the direction perpendicular to the element axis only to 1, and move it by (1-m)f along the element remainder 1. FIG. 5 shows an example of a device that makes the lens 7 beg for upward movement.The lens 7 is attached to a lens mount 2, and a nut 3 is fixed to the lens mount 2 with fixed nuts F and L.
A feed screw 4 extends vertically in the y direction 1, i.e., the original 1rtla', through this σnonacross 3, and is connected to a drive motor 5.The lens mount 2 also has a guide rail 6. The entire device is placed on a pedestal 8,
The guide rail 6 is fixed to a frame 8, and the T-shaped feed screw 4 is rotatably supported by a suitable bearing fixed to the frame 8. A nut 1o is fixed to the back side of the frame 8VC. has been
A feed screw 11 extends through this NAND 10 in the X direction, that is, parallel to the original axis a', and is connected to a drive motor 12.
ing. The pedestal 8 is movably guided in the Q direction by a guide rail 13. FIG. 6 is a diagram showing the control system for the drive motor 5.12. This control device uses the original size specification key 1.
4, a magnification designation key 15, a calculation section 16, and a control section 17.18 for each drive motor 5.12. The calculation FA 16 further includes a reference position calculation section 16. , y position correction calculation unit ■6□, and X position correction calculation unit 163
It consists of. When trying to restore the original magnification m″′C to the size,
The operator sets the document size A by using the document size designation key 14, and sets the magnification m by using the magnification designation key 15. σ is set in this way (+fj A is input to the reference position calculation unit 16. However, the calculation unit 161 further contains
The maximum original medium W, which is a constant unique to the slow reciprocating machine, and the lens 7σ at the time of calculation start, which is stored in the device with notes not shown, are inputted in the evening, and the same coordinate value L1 is input.1 From these input values, The distance -2-m- necessary for moving the lens 7 to the position O1 is calculated, and the result is sent to the control unit 17 as an input signal. Similarly, by inputting σ from the key 14 to the y4SL position correction calculation unit and inputting +rt and 2 from the key 15, the distance 1 of movement of the lens in the y direction required to bring the edges of the image together by %3
-2π 2(1+m)-A is calculated and the result is sent to the control unit 17 as an input signal. Based on these input signals, the control unit 17 causes the drive motor 5 to move the lens 7 in the y direction by a distance equal to the calculation result 1L. x4M, the position correction calculation unit 163 selects the vehicle rate specification key J5.
input m corresponding to the focal length of lens 7 and input f corresponding to the focal length of lens 7
From the input IJ2 corresponding to the X-direction coordinate value of the lens 7 at the time of starting the nine calculations, the moving distance in the X-direction (1-m) f-L2Y required for changing the magnification is calculated, and as a result, the control error 18 is calculated. Send as input signal. Similarly to the control unit 17, the control ms 18 sends a control signal 7 to the drive motor 12 according to the input signal, and controls the drive motor 1.
2 moves the lens 7 in the X direction by a distance equal to the calculated result, and eventually the lens 7 moves to the point Q''' in FIG. σ] Operation of the document mounting table on one side of the original (1) (In an electrophotographic printing machine that is arranged to be placed on the mounting table along the edge of 1, the operation side of the original on the photoreceptor) Therefore, if the photoreceptor is σ itself, as well as σ on the 1v photoreceptor.
) Even when transferring images onto tile paper, Enoki copying paper must be operated within the copying machine (i.e., it must be moved toward the operator's side), and malfunctions such as jamming or jamming of the collar. In other words, processing during printing can be carried out extremely easily. This is particularly effective when the original image is small and a copy paper of small size is used to match the original image. Note that the slit Although the present invention has been described with respect to the Sakura U machine (exposure method σ), the same applies to the Sakura N (Ki) machine which uses the entire surface exposure method.

[Brief explanation of the drawing]

Fig. 1 is a vertical cross-sectional view showing a conventional slit exposure type electronic image recovery machine, Fig. 2 is a diagram for explaining the optical system of Fig. 1, and Figs. 3 and 1I are details of the present invention. 5 is a plan view showing an embodiment of the lens moving device, and FIG. 6 is a plotter diagram showing the HJJ control device. 1...Platen glass, 2...Lens mount, 3...
... Nuts\4... Feed screw 15... Drive motor, 6... Guide rail, 7... Lens, 8... Frame,
9... Photosensitive drum, 10... Nut, 11...
Feed screw, 12... Drive motor 1-113... Guide rail, 14... Document size specification key, 15... Magnification specification key, 16... Calculation section, 17. 18... Control section. Agent Patent Attorney Ehara Nozomi 2 people hanging 5 figures and 6 figures

Claims (1)

[Claims] The electronic interchangeable φ5 of various sizes is placed on the original placing table with one side edge Z of the operating side edge VCa of the original placing table.
! In the Enoki U machine, the light palm thread σ is
By moving the lens in a direction perpendicular to the primary axis to a position where the primary axis passes through the center point 7 in the width direction of the document, the edge on the operating side can be placed on the confusing body. This is an electronic spiritual machine that is characterized by the manuscript image 2, No. 1J.