JPS59102255A - Copying machine capable of adjusting picture position - Google Patents

Abstract

PURPOSE:To execute copying by adjusting a picture position of an original on transfer paper, by providing a detecting means for detecting a position of the original so as to be movable, on a moving path of an original scanning means. CONSTITUTION:The first supporting member for supporting the first mirror moves along a guide bar 52 at the time of scanning and scanning is executed. Sensor detecting plates 100, 101 are installed to the first supporting member, sensors S1, S2 are installed to a body frame 104 of a copying machine so as to conform with the sensor detecting plates 100, 101, and a lever 103 fixed to the sensor S2 is installed so as to be slidable to a long groove 104' of the body frame 104. When this lever 103 is slided and the sensor S2 is moved in the direction going along the moving path of the detecting plate 101, the time when the sensor detecting plate 101 on the first supporting member is engaged to the sensor S2 is shifted, therefore, a start time of a register roller is shifted, and a picture position on transfer paper is controlled to a desired position

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a copying machine, and particularly to a copying machine equipped with a device that can adjust the position of an image on transfer paper when copying an original onto transfer paper.

When a user copies an original onto transfer paper, a copying machine has a mechanism that shifts the position of the original image (position in the scanning direction) on the transfer paper in order to intentionally create margins such as binding margins for filing, etc. on the transfer paper. Some devices are equipped with a device (image shift device) to do this. Conventional image shift devices use a method in which the document itself is shifted by controlling electrical signals, pulses, timers, etc. using operation switches, and by shifting the document abutting reference. Although it is possible to quantify the value of
<In the latter case, devices such as the document glass and document pressure bonding plate will become larger, and the document abutment reference will shift, resulting in the DF
, it has drawbacks such as difficulty in compatibility with ADF and the like.

An object of the present invention is to install a detection means for detecting the position of the original scanning means on the movement path of the original scanning means of a copying machine,
In a copying machine having a transfer drive device that starts the time when the developed image formed on the photosensitive drum is transferred onto the transfer paper based on the signal detected by the detection means, the detection means is made variable to transfer the developed image onto the transfer paper. To provide a copying machine equipped with an image shift device capable of adjusting the position of an original image on a second screen and copying, and to eliminate the drawbacks of the above-mentioned conventional example, and at the same time,
To provide an image shift device which has a simple configuration, allows the amount of shift of an original image to be seen at a glance, and is very easy to operate.

Embodiments of the present invention will be described below with reference to the drawings. FIG. 7 is a block diagram of an embodiment of an image shifting device according to the present invention for moving the image position on transfer paper. FIG. Ω is a schematic explanatory diagram of a transfer drive device that starts a movement of transferring an original image onto a transfer paper based on a drive signal generated by the image shift device of FIG. 1. FIG. 3 is a schematic diagram of a copying machine having a stationary document table to which the image shift device shown in FIG. 1 is applied.

To summarize this operation, place the original on the original glass,
When the copy button is pressed, the photosensitive drum starts rotating clockwise as shown. When the electrophotographic photosensitive drum reaches a predetermined position, a signal to start exposure is issued, and the illumination lamp J5 and the first mirror 3, which are the movable parts of the optical system, move toward the right in the figure (original) at the same speed as the circumferential speed of the photosensitive drum 2. scanning direction), and the first
The mirror 3 then starts moving to the right in the figure at half the speed. The image of the document illuminated from below by the illumination lamp 2 is transferred to the exposure section 7 by an optical system consisting of a first mirror 3, an in-mirror lens 3, and a third mirror B onto a photosensitive drum. The image is formed at the same magnification as the image. Exposure ends when the seventh mirror 3 and first mirror 3 move to positions 3' and q' shown by imaginary lines in the figure, respectively, and the optical moving section detects the positions and stops moving in the right direction and immediately moves in the opposite direction, i.e., in the opposite direction. Return to the left.

The photosensitive drum 2 is first charged to 10 by the positive charger 7,
Subsequently, when reaching the exposure section 7, the original image described above is subjected to slit exposure and at the same time is AC charged (discharged) by an AC charger No.0. Next, an electrostatic latent image is formed on the surface of the photosensitive drum 2 by full-surface exposure using the full-surface exposure lamp //, and then enters the developing device 2. Developing device/! The electrostatic latent image is developed and visualized. Next, feed roller 1 from the cassette/O
Paper feed guide through g, register roller through 2: 2
．． Transfer paper /3 sent through photosensitive drum 2 comes into close contact with photosensitive drum 2, and the developed image on the photosensitive drum is transferred to transfer paper /3 by transfer charger /q. After the transfer, the transfer paper /3 is separated by a separation roller l on the left, and is further delivered to a tray /9 via a fixing device /7.

FIG. 3 is a detailed explanatory diagram of the mirror driving device shown in FIG. 3. The first mirror 3 is supported by the first support member left 0 in a position inclined at a required constant angle with respect to the υ horizontal, and the second mirror 3 is supported by the is supported by On the sides of both ends of the second mirror 3 and the second mirror, there are guide rods parallel to each other along the moving direction of the first mirror and the second mirror. ! ;3,59 are arranged via other members. The end of the guide rod S2 of the first support member left 0 is slidably fitted into the guide rod 3.2, and the end of the guide rod S2 of the first support member left 0 on the guide rod 54 side is provided with a roller left 5. is rotatably mounted, and this roller 5 is placed on a guide rod 1q.

Similarly, the end 5/a of the Ω-th support member 5/ on the side of the guide rod 3 and the bent portion 3/c of the arm portion lb are respectively connected to the guide rod 3.
A roller 3B is rotatably mounted on the end of the Ω-th support member 5/ on the guide rod 54 side, and this roller 3B is also placed on the guide rod 54. It is being Note that the shapes of the first and first supporting members and the first
．． Means for movably supporting the second support member can be arbitrarily introduced in addition to those shown in the drawings.

A seventh movable puller 9 is rotatably mounted on the shaft 3g on the left end of the second support member 3/a, and a seventh movable puller 9 is rotatably mounted on the shaft 3g on the bent portion 3/C. is installed on. The first support member 0 and the Ω-th support member 5 shown in FIG.
/li, move from this position in the directions of the arrows Otsu/ and Otsuyu, respectively. In addition, this 1st. The position of the second support member corresponds to the mirror shown by the solid line in FIG. 3, and the moving direction in FIG. 7 is opposite to that in FIG. 3.

On the left side of the guide rod 53 in the illustration, there is a movement range from the first support member left 0 in the illustration and the first support member 3 in the illustration (sufficient for the mirror to scan the maximum document specified by the machine specifications). The first fixed pulley 3 is rotatably attached to the stationary shaft further to the left than the moving distance determined at the time of design. A fixed boolean 3 is rotatably mounted on the fixed boot 3 in the right direction. A drive pulley Otsu 7 is fixed to the drive shaft tg at a lower intermediate position between the first fixed pulley Otsu 3 and the first fixed pulley Otsu 3. As shown in the figure, a wire 9, whose both ends are fixed to the support portion 0, is passed through each pulley.

FIG. 5 is a view of the first support member 0 in FIG. 4 viewed from the left in the longitudinal direction. In this figure, a sensor detection plate 100°10 is attached to the first support member left 0, and a sensor detection plate lOθ is attached to the main body frame/Qll of the copying machine.
, 101, a sensor Sl, 82 (microswitch, photocoupler, etc.) is installed. In addition, the main body frame 10g is provided with a long groove 10g', and the sensor S
A lever 103 is fixed to the long groove 2 and slidable in the long groove /Q t, t/.

The operating method of this embodiment will be explained below with reference to FIGS. 1 to 5. When the user presses the copy button, when the photosensitive drum reaches a predetermined position, a signal to start exposure is issued, and the drive pulley Otsu 7 fixed to the drive shaft Otsu rotates in the direction of arrow 7g (counterclockwise). and the first support member 50
moves in the direction of the arrow B/ at the same speed as the circumferential speed of the photosensitive drum 2, and similarly, the U-th support member 3/ starts moving in the direction of the arrow B at half the speed. At this time, when the first support member 0 starts moving and reaches a predetermined position, the sensor detection plate 100 engages with the sensor S, and the paper feed roller/g
Clutch C1, which transmits the drive of motor M, is operated to rotate paper feed roller /g, and transfer paper /3 is fed until it hits register roller 22, which is stopped. The first support member 10 moves further, and the sensor detection plate 10 detects the sensor S.
When it reaches the position where it engages with register roller 2,
．． The clutch C2 that transmits the drive of the motor M to the transfer paper 1 is activated, and the register roller pair 22 starts rotating.
3 is sent onto the photosensitive drum unit, and the same size image of the original is transferred onto transfer paper in a transfer section. At this time, the user uses lever 10.
The sensor S2 is fixed to the support member 50 by moving the detection plate 3! When Q/ moves in the direction along the movement path, the timing at which the sensor detection plate 10 on the first support member 0 engages with the sensor S2 is shifted, and as a result, the timing for starting the register roller pair 2.2 is delayed. To reproduce the desired image position on the transfer paper by shifting (by changing the length of time from the time when the leading edge of the transfer paper reaches the transfer unit to the time when the leading edge of the original image on the drum arrives at the transfer unit). I can do it. In FIG. 1, TI and T2 are timers that are activated for a predetermined time from the time when the sensors S i and S 2 respectively generate a signal,
Clutch CI.

C2 operates while the corresponding timers TI and T2 are activated. Then, for the above predetermined time, the rear end of the transfer paper is at the roller/g.
This is the time required to remove the roller 1 or the roller 22.

FIG. 4 is a schematic plan view of a document glass of a copying machine equipped with the image shift device of FIG. 1. The document scanning direction is the direction indicated by arrow B1. A reference plate is used to position the original by abutting the two sides of the original against the two sides of the original glass.
107 is installed. The user uses the manuscript 103 as the reference plate 10.

The original is placed on the glass using the corner formed by the arrow 107 as a reference point, but by moving the lever 103, the leading edge position of the original image on the transfer paper/3 is changed from the leading edge of the transfer paper in the original scanning direction to the position of the displacement image of the sensor S2. Shift by the same amount as the amount.

The image at the other end of the document is shifted out of the transfer paper. In this way, by attaching a device having a simple sensor function to a copying machine, image shifting can be made possible.

Between 10g and 109, lever 10 is connected by connecting member/10.
This is an index member that is fixedly connected to 3 and moves in the document scanning direction as 3 moves. When the index member 10g comes to the /θg' position, the leading edge image of the document is formed on the transfer paper at a position corresponding to the 10g' position, and a margin of the same width as the notched area is on the leading edge of the transfer paper. It is formed. On the other hand, the trailing edge region of the document corresponding to the width from the trailing edge of the document to the broken line indicated by the index 709' protrudes from the transfer paper and is not transferred.

Note that a sensor 81. is attached to the first support member 0. The same effect can be obtained by attaching the sensor detection plate 100, 10/ to the main body frame 1otit of S2, and the sensor detection plate/Q
Q, /Q/ are integrated and the sensors Sl, S2 are the first
It is also possible to mount the support members in series in the direction of movement of the support members. Furthermore, the image position adjustment device configured according to the present invention has the following features:
It can also be applied to a copying machine that scans the original by moving the original platen, and the engaging part 10' of the sensor detection plate /Q/ to the sensor S2 is moved in the original scanning direction B/ as shown in Fig. 7. On the other hand, if the surface is inclined, the direction in which the sensor or the sensor detection plate is moved can be arbitrary, for example, the direction P1 orthogonal to the direction in which the first support member 0 moves.

It can also be applied to a copying machine that can copy originals at a different magnification even when the original is stopped, and in this case, the leading edge position of the copied image at the selected magnification is set on the transfer paper in the direction corresponding to the original scanning direction from the leading edge of the transfer paper. can be shifted arbitrarily.

As explained above, according to the present invention, by attaching a device with a simple sensor function to a copying machine, it is possible to easily determine how much the original image is shifted on the transfer paper, and the user You can make arrangements for your convenience.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of an image shift device showing an embodiment of the present invention, FIG. 2 is a schematic explanatory diagram of a transfer drive device using the image shift device of FIG. 1, and FIG. 3 is a diagram of the present invention. FIG. 7 is a schematic diagram of a mirror drive device of the copying machine of FIG. 3, and FIG. Fig. 4 is a view of the first support member 50 of the mirror drive device viewed from the left in the longitudinal direction, Fig. 4 is a schematic plan view of the document glass of the copying machine shown in Fig. 3, and Fig. 7 is a diagram of another embodiment. It is a main part explanatory diagram. /... Original glass, Yu... Photosensitive drum, 3.3'.
... 1st mirror, it, l... Imperial Ω mirror, S...
In-mirror lens, B...Third mirror, 7...Exposure section, 9...Plus charger, 10...AC charger, /
l...Full exposure lamp, 1.2...Developer, 13.
...Transfer machine, /l...Separation roller 1.22...Register roller, 23...Original illumination lamp, left 0...
1st support member, 5/... 1st support member, 32, 33,
5g...guide rod, ta left, 5o...roller, 37...
・First possible pulley, 3g...First possible pulley, Otsu 3・
・Second fixed ghouli, Otsu! ...Second fixed pulley, Otsu 7
... Drive pulley, 100. /Q/...Sensor detection plate, 103...Lever, ioq...Body frame, 1
0g'...long groove, S1+S2...sensor. Figure 1 Figure 2 “.

Claims (1)

[Scope of Claims] A means for scanning an original; a detection means disposed on a movement path of the scanning means to detect the position of the original; and a driving means for driving a transfer sheet onto which an image of the original is transferred; In a copying machine including means for starting driving the drive means in response to a signal detected by the detection means, the detection means is configured to be movable to adjust the image position of the original on the transfer paper for copying. A copying machine featuring: