JPS599672A - Copying process of copying equipment and drive control method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the control of the copying process and drive of a copying machine, and more particularly to the control of the copying process and drive of a copying machine, and more particularly, the invention uses a processor that controls the drive and switching on/off of all the machines to ensure that the placed original is The toner image is conveyed in a strip and transferred onto an intermediate image carrier on which the toner image is developed and then transferred onto a supplied sheet of paper and fixed therein to produce copies of at least two sizes. The present invention relates to control of a copying process and drive of a copying apparatus.

For example, German industrial standard A4 size and German [industrial regulations @
In the case of copying machines that can make copies of different sizes, such as A3 size, the size is usually adjusted to the largest size, so when making copies of the smaller size, The copying process always proceeds at the same speed. In the case of smaller sizes, the working process therefore takes an unnecessarily long time. Furthermore, when making low force size copies, there is also the risk that toner will be transferred onto the intermediate image carrier, which will contaminate the receiving device.

It is an object of the invention to configure the control of a reproduction machine suitable for at least two sizes in such a way that for each size the highest possible working speed is achieved and the risk of soiling the machine is reduced. . This problem is solved by using a sensor to detect the trailing edge of the inserted paper and provide input to a processor that regulates the original transport and copying process.

As a result, the entire process is automatically shifted to the side in relation to each size using the control mechanism 1f141, so that an optimum working time can be obtained for each size. This side wheel) is automatically operated in relation to the size of the paper to be pushed in, so there is no possibility of the operator making an incorrect operation. Thereby, it is also possible to copy sizes between the maximum size and the minimum size at respective optimum working speeds.

According to a preferred embodiment of the invention, a slide for the original to be placed is provided, and this slide is provided with a drive motor that is mechanically separated from the main drive motor and controlled by a processor. This drive motor drives a 3Q tension meter for IM horizontal output to detect the f to γ position of the sliding plate, and also drives the +4? Control (other force side position 1
1) The mechanism is 11iii, and the acceleration and delay profile is preset from the final position related to the size by this servo allocation 11 mechanism.
1tltl is done. As a result, the sliding plate is automatically returned at the highest possible return speed for any number of copies, and strong vibrations in the copying device are not caused by sudden accelerations or especially sudden stops of the sliding plate. The same principle can also be realized when the original is placed in a fixed position and the movable objective lens is provided with an exposure device. In this embodiment, in order to achieve precise synchronization between the sliding plate and other elements, the frequency and mode of the two driving motors are also changed between the sliding plate drive motor and the main drive motor during forward movement. The synchronization is made to take place by comparing the frequency of the main drive motor with the reference frequency.

In order to be able to interrupt the copying process immediately with respect to the trailing edge of the inserted paper, with as little wasted distance as possible, according to a preferred embodiment of the invention, the trailing edge of the inserted paper is A sensor for detecting is placed in front of the transfer corona that transfers the toner image onto the paper, at the distance of the path to be left behind the paper, and this distance is located around the drum as an intermediate image carrier, at that position of the drum. This corresponds to the length between the position where the original above is copied and the transfer corona. Thereby, it is ensured that only the master, first, mother, and toner images are formed within the range accommodated by the size of the intermediate image carrier L.

According to another embodiment of the invention, an auxiliary loading device is provided for supplying only one sheet of paper to the eM copying device, which auxiliary loading device bypasses the main loading device and transfers the transport element and the working process. The processor has a sensor in the processor that detects the presence of paper and generates a start signal. Thereby, only one sheet of paper to be copied can be fed via a so-called bypass, and the operator does not have to monitor what size sheet is in the device at the time; There is no need to make any changes. You can actually match any size paper between the largest and smallest size. Other features of the invention, based on the embodiments shown in the diagram, allow copying to be carried out even with this single sheet at the highest possible working speed, without increasing the risk of contaminating the equipment. and explain the benefits.

The upper side of the copying machine shown in FIG. 1 is constituted by a sliding plate 2 made of four sheets of glass, and an original to be printed is placed on this sliding plate 2 at a predetermined position.

This sliding plate 2 is in the final position shown by the dashed line in Fig. 1.
In this case, the position on the right in the figure corresponds to the starting position when starting the forward movement for the copying process, and the position shown in the middle pressure in Figure 1 is for making copies of the largest size. ) & end position of the sliding plate. The sliding plate 2 is driven by a drive motor 5, such as a chain drive or a toothed belt drive (not shown).

This drive motor 5 further drives a position detecting potentiometer 6, and since a comparison potential is attached to this position detecting potentiometer in the sensor 4, the position of the sliding plate 2 is determined at any given time via the potentiometer 6. is revealed.

The original placed on the sliding plate 2 is the exposure ramp '13.
The image is exposed in strips by the lens and correspondingly copied in strips via a glass fiber objective 14 onto a drum 8 as an intermediate image carrier, around which a photoconductive conductor is provided. It is being In the direction of rotation of the drum 80, in front of the exposure position determined by the glass fiber objective lens, a charged corona 15 is attached to the circumference of the drum, and this charged corona 15 causes an equally shaped static '@ L potential is generated, and this -
The potential is exposed to light through the glass fiber objective lens 14, and is discharged to form a charge corresponding to the original that should be α4.
Becomes Zetan. In the direction of rotation of the drum 80, a developing device 16 having a magnetic roller is disposed next to the glass fiber objective lens 14, and this magnetic roller develops a toner image onto the drum 8 in accordance with a charging pattern.
formed above. Furthermore, in the drum 80 rotation direction,
A transfer corona 7 is disposed next to the developing device [16], and the toner image is transferred from the drum 8 onto the paper to which it is supplied. Next, the toner image and paper are separated from the drum by the disposed charge eliminating corona 17. The toner image on the paper is fixed on the paper by a fixing device 19 composed of a large number of tapes after the static eliminating corona 17.

The sheet with the fused toner image is then ejected from the copying machine by an ejection port 20. The stacks of paper are supplied to the copying machine by a main input device, which includes a cassette 21 that holds stacks of stacks of paper.
The sheets are then taken out one by one from this cassette 21 by a number of inlet segments arranged on a common axis and fed to a transport roller 11 arranged in front of the transfer corona 7.

The inlet segment 22 and the transfer row 211 can each be connected to the main drive via a coupling.
fiiEi, and this main drive device is driven by a main drive motor 3. This drive motor 3 is further connected to a drum 8 via a chain drive (not shown).
The magnet roller of the developing device f16, the transport device 18, the fixing device 19, and the discharge roller 20 are driven. Furthermore, this main drive unit 3 drives a cleaning device 1123, which further includes an erasing lens 24 attached to the drum 8, for cleaning the drum by removing toner material not deposited on the drum 8 from the drum. is set to .

The drive motor 5 for the sliding plate 2 and the main drive motor 3 are mechanically separated from each other. During the copying process, the synchronous a rotation between both drive motors is controlled by the micro:/'' processor 4 through frequency comparison and mode comparison. The frequency of this frequency No. 16 generator serves as the reference frequency.

The microprocessor 4 controls the switching on/off and individual driving of individual machine groups in relation to the applied 4M signal. An input and output unit 26 is connected to this microprocessor 4, by means of which input and output units 26 select, for example, the j4 degrees of exposure and in particular the desired number of copies and provide a start signal. The start signal of the input/output unit 26 causes the microprocessor to start the main drive motor 3 and also switch on the eraser lens 33 directly adjacent to the exposure position of the glass fiber objective lens 14 . Before the paper is introduced, a sensor 27 associated with the cassette 21, for example a light barrier, tests whether the cassette 21 is present and whether a paper is contained in this cassette. In that case, the microprocessor 4 connects the coupling of the inlet segment 220, so that this inlet segment twists through a predetermined angle and detects the leading edge of the sheet under the sensor 1, which is also designed as a light barrier. When the leading edge of the sheet reaches the sensor lK, a signal 48 is inputted from the sensor to the microprocessor 4, which accordingly switches on the drive motor 5 of the sliding plate 2, thereby moving the sliding plate 2 to the starting position. (Figure 1 right). The position detection button 7 yometer informs the microprocessor 4 that the plate 2 has reached the starting position, and then the drive motor 5 is switched to forward movement. The sliding plate 2 has two switches 28 arranged in the copying machine and activated depending on the position of the sliding plate.
．． An operating element for operating the 29 is provided.

In this case, it is preferable that the operating element of the kick plate is fixed to the slide plate and can be adjusted fA in the sliding direction. Based on the signal of the switch 28, the microprocessor switches off the erasing lens 33 and simultaneously switches on the charging corona 15 and the exposing lens 13. After a short delay, the coupling of one further input segment 22 is operated in such a way that the leading edge of the sheet is forced by this input segment 22 onto the transport row 211 . After a short period of time, the switch 29 is operated and the microprocessor (based on No. 8)
After connecting the coupling 'l, synchronized operation between the sliding plate 2 and the paper, the drum 8 and other members is started.

The switch 29 also sets counters internal to the microprocessor to various values, and these values cause the transfer corona and the pulse to be activated with a predetermined delay determined by the pulse of the main drive motor 3 which supplies the base frequency. The neutralizing corona is switched on. After further delays, the transfer equipment [
18 sensors 3.degree. are driven, and this sensor 30 separates the sheet with the two-dimensional image from the drum 8 and confirms whether it has been further transported correctly. Then, after a further delay, the sensor 31 is driven, and this sensor 3
Reference numeral 1 denotes a known ring switch attached to the ejection roller 2o, for example, and controls the ejection of paper.

For example, following a predetermined transport path of the transport rollers 11 which is also determined by the main drive of the main drive motor 3, the sensor 1 is activated to detect the trailing edge of the incoming paper and inform the microprocessor 4, which accordingly The processor 4 controls a blocking program which makes decisions as to whether to make many copies or one copy. However, in each case the drive motor 5 of the sliding plate is switched from forward to reverse.

From the sensor 1, nine pulses are applied to the microprocessor counter set by the input/output crab unit 26, and the counter is reset by the pulse each time. As long as this counter is not reset to zero, the program is repeated, the slide is returned to the starting position, and the paper is removed again by the input segment 22.

Additionally, in order to prevent as much as possible toner material from adhering to the areas remaining between the individual images on drum 80,
Erase run f33 is switched on. In that case, it is important that the sensor 1 and the exposure position have equal distances to the charged corona 7. Thereafter, the work flow activated by switches 28 and 29 is carried out anew in the manner already described.

When the counter of the microprocessor 4 set by the input/output crab unit 26 is reset to zero by the four pulses of the sensor 1, a shut-off program controlled by the sensor 1 is started and the sliding plate is shown in solid line in FIG. returned to the central position.

Furthermore, the charged corona 15 is cut off. After a predetermined delay corresponding to each path, the transfer corona 7 and the static elimination corona 17 are switched on. After a further delay, sensor 30 is shut off to prevent unwarranted paper jam reporting. After a further delay, the switch sensor 31 is activated. This switch 31 is activated at the trailing edge of the paper and shuts off the main drive motor 3.

The drive motor 5 of the sliding plate 2 is equipped with a circuit d? A control mechanism (an external force control mechanism) is provided, and this servo is controlled by the control mechanism to a second
The acceleration and delay profiles for the movement of the slide plate 2 shown in the figure are given. From the respective position confirmed by the trailing edge of the paper detected by sensor 1, the sliding plate advances to the center path with a predetermined acceleration, corresponding to the arrow guided from left to right, and then with a predetermined delay at 7. It then stops, so it returns the required path at maximum speed, but without any sudden acceleration or retardation forces that would slow the reproduction machine down. The forward movement begins at a predetermined acceleration and is then controlled at a constant speed. This speed is synchronized by a frequency and mode comparison between the main drive motor 3, which supplies the reference frequency, and the speed frequency of the drive motor 5. The stop is then carried out after a predetermined delay.

By repeatedly activating the control program control and cut-off program control 1 by the trailing edge of the paper being fed, the optimal working speed for each individual sign is obtained, and the operator does not need to make any special adjustments. . Simply inserting a cassette 21 of the corresponding size is sufficient.

Furthermore, it is also possible to introduce only one sheet of different size, independent of the non-sheet size present in the cassette 21, in which case also an optimum working speed is obtained; At the same time the risk of soiling is reduced. To guide the individual sheets, an auxiliary inlet device 9, a so-called pie roller, is provided, which is provided with an auxiliary inlet roller 232, which roller 32 is connected to the microprocessor 4 by means of a coupling. can be connected to a drive driven by the main drive motor 3 via. The presence of paper in the auxiliary loading device is detected by sensor 12 and reported to microprocessor 4 . This microprocessor 4 then starts the auxiliary input roller 32 by switching on the coupling after a predetermined delay. The auxiliary input row 232 guides the inserted sheets to the sensor 1, which sends a corresponding start signal to the microprocessor, after which the already described copying process corresponding to the case of a single copy starts, but The auxiliary input roller 32 instead of the segment 220 is again activated briefly by the switch 28;
The difference is that the front end of the paper is inserted into the transport roller 11. In this case too, corresponding to the embodiment described above, the trailing edge of the inserted sheet controls the cutoff program.

Margin below

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram showing a method of controlling a copying machine equipped with a sliding plate for moving a placed original, and Fig. 2 is an explanatory diagram showing the acceleration profile of the movable sliding plate when moving forward and backward. be. DESCRIPTION OF SYMBOLS 1...Sensor, 2...Sliding plate, 3...Main drive motor, 4...Processor, 5...Drive motor, 6
... Potentiometer for position detection, 7... Transfer corona, 8... Drum, 9... Auxiliary carrying device, 10...
- Main carrying device, 11...Transfer roller, 12...Sensor, 13...Exposure lamp, 14...Glass fiber objective lens, 15...Charging corona, 16...Developing device, 17...・Static charge removal corona, 18...transfer device, 1
9...Fixing device, 20...Cedar exit roller, 21...
Cassette, 22... Carrying-in segment, 23... Cleaning device, 24... Erasing lamp, 25... Frequency signal generator, 26... Input/output crab unit, 27...
Senna, 28.29...Switch, 30.31...
Sensor, 32... Auxiliary carry-in Ll=l. Margin below

Claims (1)

[Claims] 1. Using a processor that controls the switching on/off and drive of all machines, the mounted original is conveyed in a strip and transferred onto an intermediate image carrier, and this intermediate image is In a copying process and method for controlling the drive of a copying apparatus for making copies of at least two sizes, a toner image is developed on a carrier and then transferred onto a supplied paper and fixed thereon, the trailing edge of an inserted paper. A method for controlling the copying process and drive of a copying apparatus, characterized in that the information is detected by a sensor (1) and input to a processor (4) that regulates the movement of an original and the copying process. 2. A slide plate (2) for the original to be placed is provided, which slide plate is mechanically separated from the main drive motor (3) and drives a drive motor (5) controlled by a processor (4). This drive motor (5) drives a position detection potentiometer (6) that detects the position of the slide plate, and also operates a sensor. 2. A control mechanism according to claim 1, characterized in that said servo control mechanism controls the return process from a size-related final position towards a preset acceleration and delay profile. Control method. 3. Synchronization is carried out between the main drive motor (3) and the drive motor (5) of the sliding plate (2) during forward movement by comparing the frequencies and modes of both drive motors, in which case the main 3. The control method according to claim 1, wherein the frequency of the drive motor (3) is a reference frequency. 46 Sensor (1) that detects the trailing edge of inserted paper
is placed in front of the transfer corona (7) which is to transfer the toner image to the paper, the length of the path to be left behind the paper;
This length corresponds to the drum (8
) corresponds to the length between the position where the original is copied onto this drum (8) and the transfer roller (7). The control method according to any one of the items. 5. The copying device is equipped with an auxiliary loading device (9) that supplies only one sheet of paper, and this auxiliary loading device bypasses the main loading device (10) to transfer the paper (11) and starts the work process. Claim 1, further comprising a sensor (12) for detecting the presence of paper (a) through the sensor (1) and generating a start signal in the processor (4). - The control method according to any one of Items 4 to 4.