JPS6356748B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image recording apparatus that records an image on a recording material based on an image signal obtained by reading an original image.

For example, when copying a magazine or the like and filing the copy paper in a binder or the like, there is a drawback that information on the left side of the copy paper is missing due to the perforations for the filing. In order to overcome this drawback, the user places the original on the document table with a margin for perforation in advance, but it is cumbersome to place the original with the margin in advance. Moreover, it required time and attention. Moreover,
When copying a book such as a magazine, if the book cannot be placed so that it protrudes from the document table (the document holder gets in the way, or if you are using a copying machine that moves the document table), the document is a book. This results in the inconvenience of having to reverse the top and bottom of the book placed on the manuscript table between the left and right pages, and reversing the direction in which the book is moved between the left and right pages.

For example, an example of this is shown in FIG. 1. FIG. 1 is a plan view of a document table 1 of a document moving table type copying machine capable of copying up to B4 size documents. This manuscript table 1
Here, the positions where the original should be placed for the three types of paper sizes are indicated by ▼ marks.

Although not shown in the figure, there is a document table 1 on the upper side of the figure.
The document table cover that holds the document on top (the fulcrum for opening and closing)
It is assumed that the When copying using the document table shown in FIG. 1, the operator must always copy by aligning the document with the left corner of the figure (corner adjustment method).

For example, with A4 size recording paper, B5 as shown in Figure 1B.
When copying the right page 3 of a book 2 of size or A4 size, the right page 3 is located at the top in Figure 1,
The left page 4 must be placed at the bottom, and the left page 4 must be placed slightly above the designated position by the space required for the margin. On the other hand, when making a copy of left page 4, in Figure 1, position left page 4 at the top and right page 3 at the bottom, and position it slightly below the designated position by the space required for the margin. must be disciplined.

As explained above, in conventional copying machines,
It is extremely troublesome for the operator to remove the margins when copying, and it is also difficult to ensure a certain amount of margins.

The present invention has been made in view of the above points, and includes a reading means for reading and scanning a document image in the main scanning direction, a moving means for moving the reading scanning position of the reading means in the sub-scanning direction, and a moving means for moving the reading scanning position of the reading means in the sub-scanning direction. a storage means for storing an image signal to be output; a reading means for reading out the image signal from the storage means; and a recording means in parallel with reading and scanning of the original image by the reading means based on the image signal read from the storage means. a recording means for recording an image on a material; a delay means having a variable delay amount for delaying either the start of movement of the reading scanning position by the moving means or the start of image recording by the recording means; a setting means for setting an image recording position on the recording material; and a setting means for setting the image recording position on the recording material, and controlling the readout of the image signal from the storage means by the reading means to set the image recording position on the master. Recording that moves in the scanning direction and moves the image recording position in the sub-scanning direction by controlling the amount of delay between the delay means starting to move the reading scanning position by the moving means and the start of image recording by the recording means. The purpose of the present invention is to provide an image recording device having a position control means, which makes it possible to read an original image and record the image on a recording material in real time, and also enables the image recording device to read an original image and record the image on a recording material in real time. It is possible to move the image recording position also in the direction with a simple configuration.

FIG. 2 is a schematic diagram of a copying and recording apparatus to which the present invention is applied, and this copying and recording apparatus includes a reading section for reading information on a document as shown in FIG.
As shown in the figure, it consists of a recording section that records information on recording paper.

As shown in FIG. 2A, an original table 11 made of glass or the like is formed in the upper part of the reading section, and a document is placed on this original table 11. A document table cover 20 is provided above the document table 11 to fix the document.

At the bottom of the document table 11, there is a bar-shaped light source 12 that illuminates the document, and the light emitted from the light source effectively illuminates the document table 1.
An optical unit consists of a reflecting mirror 13 provided to irradiate a document 1, a light receiver 14 having a large number of light receiving elements arranged in a straight line, and an optical lens 15 that forms an image of image information on the original onto the light receiver 14. It is provided. This optical unit is integrally formed with a support (not shown) and is fixed to a base 19. The base 19 is slidably provided on the guide rail 16, and is moved forward in the Q direction or backward in the anti-Q direction by a screw 17 rotated by the drive of the motor 18.

It is also assumed that the main scanning direction of the light receiver 14 is to sequentially and repeatedly scan the document surface in the direction P in FIG. 2A. Therefore, by moving the optical unit (sub-scanning), information on the document placed on the document table 11 is sequentially transferred to the light receiver 1.
If the light-receiving elements are sequentially read out (main scanning), the original is read out in raster form from the light-receiving device 14.
It is possible to obtain scanned sequential pixel signals. In short, optical information on a document is read out sequentially pixel by pixel.

In this embodiment, the original platen 11 is fixed and the optical unit moves, but a structure in which the optical unit is fixed and the original platen 11 moves may also be used.

Next, the recording section will be explained with reference to FIG. 2B.

The recording paper 21 is held on a drum 22 having a large number of through holes (not shown) around its circumference by making the internal pressure of the drum negative from atmospheric pressure.

A pulley 23 is fixed to a rotating shaft 34 of the drum 22, and a belt 25 wound between the pulley 23 and a motor 24 rotates the drum in the R direction.

(Main scanning) Recording head, for example, inkjet head 27
is provided on a head support 29 together with a paper detector 28 for detecting the edge of the recording paper 21 wound around the drum 22. The paper detector 28 is, for example, a combination of a light emitting element and a light receiving element (photo interrupter).
can be used to detect the difference in light reflection between the paper and the drum. The head support 29 is slidably provided on a guide rail 30, and is moved forward in the S direction in FIG. In order to prevent bearings, jitter, etc. of the recorded image, the motor 31
It is preferable that the motor be rotated in synchronization with the rotation of the drum 22, and preferably driven by the same clock source as the motor 24. Or the gear from the rotation of the drum 22,
The power may be mechanically transmitted to the screw 32 using a belt or the like. A rotary encoder 33 is connected to the other end of the rotating shaft 34 of the drum 22, and the rotation angle of the drum 22 is detected by the output of the rotary encoder 33, and the printing timing of the inkjet is synchronized. Further, the output pulses of the rotary encoder 33 may be used as drive pulses for the motor 31 (consisting of a pulse motor) described above.

When copying and recording is performed using the devices shown in Figure 2 A and B,
While the base 19 of the optical unit is moving in the Q direction,
The information on the document table is repeatedly raster scanned in the P direction. At this time, the drum in the recording section rotates in the R direction,
One line of raster-scanned image information is recorded on recording paper during one rotation of the drum. Furthermore, recording is performed while the head support moves in the S direction in synchronization with the movement of the base 19 of the optical unit in the Q direction. That is, the P direction of the reading section corresponds to the R direction of the recording section, and the Q direction of the reading section corresponds to the S direction of the recording section.
In this case, the image information obtained by the reading section is transferred to the inkjet head 27 of the recording section via a buffer circuit.
The data is sent to the computer and recorded in parallel with the reading.
For example, information for one page of a document that has been read may be stored in a memory and then recorded again.

The light receiver 14 is composed of a large number of light receiving elements that convert optical input into electrical signals, and can process these signals in a time-series manner, such as a charge-coupled device (CCD), for example. In the apparatus shown in FIG. 2, if we consider a document table similar to that shown in FIG. 1, the document table needs to have a width of 257 mm. (Direction P in FIG. 2A) On the other hand, if the light receiver 14 uses a 2048-bit linear sensor, for example, a resolution of 8 pixels/mm can be obtained. If even higher resolution is required, multiple lenses and multiple linear sensors may be used. In any case, the linear sensor must be installed so that it can detect the entire width of the document table.

In the apparatus described above, FIG. 3 shows a schematic diagram of a control circuit for arbitrarily setting the recording position of information on the recording paper.

To explain the operation of the circuit shown in FIG. 3, the difference counting circuit 42 calculates the phase difference between the output pulse of the paper detector 28 and the reference signal, that is, the zero signal 61, which is derived once per rotation of the rotary encoder. It is counted using the clock signal 62 of the rotary encoder. This is done in order to replace the signal of the paper detector 28 which detects the leading and trailing ends of the recording paper 21 wound around the drum 22 with the clock pulse 62 of the rotary encoder 33. This operation is performed during one rotation of the drum before copying starts, and thereafter, during recording of one sheet, the leading and trailing edges of the paper are determined by the output of the rotary encoder 33. Therefore, the difference counting circuit 42 operates during the time required for one revolution of the drum 22 when the copy start signal 64 is generated from the copy start circuit 41.
During this time, the distance between the zero signal, the starting edge, and the ending edge of the paper is counted using the zero signal 61 of the rotary encoder 33 and the starting edge and ending edge of the paper detected by the paper detector .

To explain this operation using the timing diagram shown in FIG. 4, the zero signal 61 corresponds to one rotation of the rotary encoder 33, as shown in FIG.
It is assumed that the rotary encoder 33 generates 2048 pulses, for example, the clock signal 62 (FIG. 4C) during this one cycle. On the other hand, the head support 29
A paper detector 28 provided above detects the difference in reflected light between the recording paper 21 and the drum 22, and sends a low level signal to the signal line 63 for the recording paper and a high level signal to the drum. Output. As shown in FIG. 4D, while the paper detection signal is at a high level (T3 in FIG. 4D), section b on the drum in FIG. 2B is being detected.

The difference counting circuit 42 counts the distance T1 between the zero signal 61 and the leading edge of the recording paper using the clock signal 62 of the rotary encoder as a reference clock, and outputs ST on the signal line 67. The interval T2 until then is counted and the output ED is output. The margin designation circuit 43 can set an arbitrary digital number and instructs whether to add or subtract the set number.The digital number is derived on the signal line 68, and the command signal is transmitted on the signal line 69. It is derived.

The addition/subtraction circuit 44 is capable of 12-bit addition/subtraction operations, and adds or subtracts the output ST of the difference counting circuit 42 and the number set by the margin designation circuit 43 based on a command signal, and presets the counter 45 with the result. Output to input terminal P1. On the other hand, the output ED of the differential counting circuit 42 remains as it is and is output to the counter 46.
Connect to preset input terminal P2 of The counter 45 and the counter 46 are 2048-base counters, the input clock is the clock signal of the rotary encoder 33, and the zero signal of the rotary encoder 33 is used as the preset value load signal. In addition, the counters 45 and 46 have carry (carry) terminals CT1 and CT2 that derive a carry output in 2048 decimal, and in the case of the counter 45, a margin is specified in the output ST corresponding to the position of the leading edge of the recording paper. When the paper detector 28 reaches a position corresponding to the number obtained by adding or subtracting the number set by the circuit 43, a carry output CT1 is generated. In the case of the counter 46, a carry output CT2 is generated when the paper detector 28 reaches the position of the trailing edge of the recording paper.

These carry outputs are connected to the reset terminal R and the set terminal S of a set, reset, flip-flop 47, respectively, and the signal shown in FIG. 4E is outputted to the output terminal of this flip-flop 47. As can be seen from FIG. 4E, the signal at the output terminal becomes high level after a delay of T4 from the leading edge of the paper, and becomes low level at the trailing edge of the paper. By using this signal as an enable signal for the inject head, and by changing the setting value of the margin designation circuit 43 to change the time T4, the recording start position on the recording paper can be arbitrarily selected.

On the other hand, to briefly explain the control mechanism of the reading section and recording section with reference to FIG. 3, the light receiver 14 is, for example, a CCD sensor, and a shift clock, reset clock, start pulse, etc. are applied to it by a clock circuit 48. be done. The video output of the CCD sensor constituting the light receiver 14 is transferred to the memory section M via a binarization circuit 49 and a buffer circuit 50. The memory section M consists of an input switch circuit 52, an output switch circuit 53, two line memories 54 and 55, and a memory control circuit 51 that controls them. Line memory 54 and line memory 55 are each 2048-bit memories, and are controlled by memory control circuit 51 so that when one is in input mode, the other is in output mode. Correspondingly, the input switch circuit 52 is selected so that data is input to the line memory in the input mode, and the output switch circuit 53 is selected so that the data in the line memory in the output mode is output. Input and output are performed by synchronizing the input memory with the CCD reset clock RC on the signal line 66 and the output memory with the rotary encoder clock signal 62. Furthermore, the output timing of the output memory is controlled by the output on the signal line 65 of the flip-flop 47, as described above. The image information output from the output line memory controls the inkjet drive circuit 56 and drives the inkjet head 2 according to the image information.
Recording is performed at step 7.

Next, an example of the margin designation circuit 43 will be explained in the fifth section.
This will be explained using figures. The margin specifying circuit 43 is a circuit that digitally generates a shift amount corresponding to the margin, and the shift amount is determined by a shift amount setter 71 consisting of a variable resistor or the like shown in FIG. In the embodiment, the shift amount setter 71 changes the voltage input to the AD converter 75. The AD converter converts into an 8-bit digital signal, for example, and can shift up to 32 mm in a copying/recording device with a resolution of 8 pixels/mm. In this example, an 8-bit digital signal is input to a 12-bit addition/subtraction circuit 44.
The configuration was made so that 8 bits are connected from the lower bit (LSB) of
It is possible to shift in mm units. Such high precision is not required in practice, so for example, 4-bit AD
If this output is connected to bit 5 to bit 8 of the adder/subtractor circuit 44 using a converter, 32
It has the advantage of being able to shift up to mm and requiring only a 4-bit AD converter. Furthermore, if a larger shift amount is desired, an AD converter with a larger number of bits may be used, or the output of the AD converter may be connected to the more significant bits of the addition/subtraction circuit. The changeover switch 77 is a single-pole, double-throw switch, for example, an analog switch, which is switched by the signal from the margin shift switch 70, and when the margin shift switch 70 is pressed, the output of the AD converter 75 is switched to the signal line 6.
8 and is applied to the addition/subtraction circuit 44. When the margin shift switch 70 is not pressed, the changeover switch 77 applies digital zero from the zero signal generator 76 to the addition/subtraction circuit 44 via the signal line 68.

The addition/subtraction circuit 44 is supplied with shift amount information from the margin designation circuit 43 through a signal line 68, and is also supplied with an addition/subtraction designation signal through a signal line 69.

If you only need to move the book parallel on the platen when copying the right and left pages of a book, then only addition is required, but as explained in Figure 1, each time you copy the left and right pages, , when the book has to be turned upside down, the margins are not only placed at the leading edge of the recording paper (left page), but also at the trailing edge (right page), in which case a subtraction operation is also required. be. For the reasons mentioned above, this embodiment is configured so that the addition/subtraction is designated to the addition/subtraction circuit 44.

Instructions for addition and subtraction are given by setting the signal line 69 to high level (addition) or low level (subtraction). In devices requiring addition and subtraction, a flip-flop 74 is provided so that the signal is inverted each time the copy switch 72 is pressed. At this time, it is first necessary to specify whether to start from the left or right page, which is done by selecting the left page start switch 78 and the right page start switch 79. . Left page start switch 7
8 is on, selector switch 80 is selected to obtain the output Q of flip-flop 74;
When the right page start switch 79 is ON, it is selected to obtain an output. When either the left page start switch 78 or the right page start switch 79 is selected, the output of the AND gate 81 becomes low level (switches 78 and 79 are at low level in the ON state). - It is assumed that a high level is output in the OFF state.) The changeover switch 82 applies the output of the flip-flop 74 to the addition/subtraction circuit 44. Next, press clear switch 73 and flip/flop 7
4 to the clear state (Q = low level) (this clear switch can be used before pressing the right/left page start switch), and presses the copy start switch 72, the left page start switch 78 will be activated. When the right page start switch 79 is on, a high level (addition command) is transmitted to the signal line 69, and when the right page start switch 79 is on, a low level (subtraction command) is transmitted to the addition/subtraction circuit 44.

Thereafter, each time the copy start switch 72 is pressed, this signal 69 is inverted. Also, if both the left page start switch 78 and the right page start switch 79 are not pressed (or if there is no need to reverse the book each time the left and right pages are copied), the output of the AND gate 81 When is at a high level, the changeover switch 82 selects the power supply voltage 83 and always outputs an addition command.

The above was written on an A4 manuscript table shown in Figure 1.
This is when copying an A4 or B4 size original onto recording paper.

Next, on the document table shown in Figure 1, write it on B5 size recording paper.
This section explains how to copy a B5 size book.
In this case, the method for placing the original is different from the case described above.
With a 90° difference, the vertical and horizontal directions are opposite, and if you want to create a margin, you can control the start time of the light receiver 14 and the head support 29 instead of applying a delay for each scanning line. .

In other words, when copying B5 size on the document table in Figure 1,
If you want to create a margin on the left side of the recording paper, move the head support 29 first, and conversely, if you want to create a margin on the right side of the recording paper, move the light receiver 14 first.

An embodiment for realizing this is shown in FIG.

The operation of this circuit is such that when the copy start switch 91 is pressed, a reference signal generated thereby and a delayed signal generated later than this reference signal are sent to the start signal of the base 19 of the light receiver 14 and the ink jet. - Used as a start signal for the support 29 of the head 27 to control the start time of the base 19 and the support 29.

Which of the base 19 and the support 29 is started first is determined by turning on either the left page start switch 100 or the right page start switch 101 first, as in the example of FIG. It is determined accordingly. Left page start
When the switch 100 is on, the output Q of the flip-flop 102 is changed by the changeover switch 103.
However, the right page start switch 101 is ON.
In this case, output Q is selected. This left page
When either the start switch 100 or the right page start switch 101 is selected, the output of the AND gate 105 becomes low level, and the changeover switch 106 becomes the changeover switch 1.
The output of flip-flop 102 (99
is a switch that generates a clear signal to clear the flip-flop 102), and outputs the output to the control terminal 111 of the polarity inverting circuit 98.

On the other hand, the shift amount can be changed arbitrarily by a shift amount setter 92 consisting of a variable resistor, and this setter 92 is connected to a delay circuit 93.
The delay circuit 93 is a circuit consisting of, for example, a monostable multivibrator, and the shift amount setter 92 serves as a resistor that determines the time constant of this oscillation.
is used. If a margin shift is now required, press the margin shift switch 90, the selector switch 95 selects the output of the delay circuit 93, and sets/resets the delay signal to the flip-flop 96.
This is transmitted to the set terminal S of the terminal. Further, a copy start signal serving as a reference signal is directly applied to the set terminal S of the second set/reset flip-flop 97. These two settings/reset/
Flip-flops 96 and 97 are reset by a stop signal from copy stop signal generator 94. This copy stop signal is, for example, a signal generated by a detector such as a photointerrupter or a Hall element (not shown) provided at the return position of either or both of the head support 29 and the optical unit base 19. be.

On the other hand, the Q outputs of the flip-flops 96 and 97 are input to the input terminals 107 and 1 of the polarity inverting circuit 98, respectively.
Connected to 08. The polarity inversion circuit 98 is a double-pole double-throw switch, and depending on the signal level of its control terminal 111, connects the input terminal 107 and the output terminal 109, and the input terminal 108 and the output terminal 110 (control terminal 111 high level). (when the control terminal 111 is at low level), it is determined whether the input terminal 107 and the output terminal 110 are connected, and the input terminal 108 and the output terminal 109 are connected (when the control terminal 111 is at low level).

If the left page start switch 100 is currently on, the copy start switch 91
When is pressed, the selector switch 106 switches to the flip
The output Q of the flop 102, ie, the high level, is applied to the control terminal 111. In this state, the polarity inversion circuit 98 connects the output of the delay circuit 93 to the output terminal 109 via the input terminal 107, and connects the reference signal to the output terminal 110 via the input terminal 108. Since the output terminal 109 is used as the optical unit base start signal and the output terminal 110 is used as the head support start signal, in this case the head support starts before the optical unit base and reaches the left edge of the recording paper. A blank space appears. The opposite is true if the right page start switch 101 is pressed. Thereafter, each time the copy start switch 91 is pressed, the polarity reversing circuit 98 is switched, and the starting order of the optical unit base and the head support is alternately reversed.

The above explanation is based on the case where the left and right pages of the book to be copied must be turned upside down, as in the case of Fig. Start switch 100 and right page start switch 1
01 does not need to be pressed, the output of the AND gate 105 becomes high level, the selector switch 106 selects the power supply voltage 104, and the copy
Regardless of the number of times you press the start switch 91,
Control terminal 111 always maintains a high level. Therefore, a margin can always be obtained at the left end of the recording paper.

If margin shift is not required, the margin shift switch 90 is in the OFF state and the selector switch 9 is turned off.
5 directly transmits the signal from the copy start switch 91 to the flip-flop 96, so that the optical unit base and the head support are started at the same time.

Above, an example in which B4 size and A4 size recording paper is used (Figure 5) and an example in which B5 size recording paper is used (Figure 6) have been explained on the manuscript table shown in Figure 1. , a circuit that automatically selects these two circuits based on a copy size signal is shown in FIG.

The circuit in FIG. 7 includes a switch 130 for specifying B4 size copy paper, a switch 131 for specifying A4 size,
When one of the B5 size designation switches 132 is selected and the margin shift switch 70 is pressed, either the embodiment shown in FIG. 5 or the embodiment shown in FIG. 6 is selected depending on the copy size. That is, when either switch 130 or switch 131 is turned on (output is at low level), AND gate 133 is at low level, and at this time, margin shift switch 136 is on, that is, at low level. , OR gate 134 outputs a low level. At this time, switch 132 is at high level, so the output of OR gate 135 is at high level. The output of OR gate 134 is connected to circuit 43-1 via signal line 137 in FIG. 5, and the output of OR gate 135 is connected to circuit 112 via signal line 138 in FIG. Therefore,
When copying B4 or A4, the circuit in Figure 5 is reversed.
When copying B5, the circuit shown in FIG. 6 is selected.
Further, when the margin shift switch 136 is in the off state, the outputs of the OR gates 134 and 135 are both at a high level, and the margin shift is not performed in the circuits of FIGS. 5 and 6.

As described above, according to the embodiment shown in FIG. 7, by selecting the copy size, one of the two margin shifting methods shown in FIG. 5 and FIG. 6 is automatically selected. Further, the margin shift amount setters 71 and 92 in FIGS. 5 and 6 can be set to copy start switches 72, 91, clear switches 73, 99, left page start switch, etc. by appropriately selecting circuit constants. The switches 78 and 100 and the right page start switches 79 and 101 can be used as they are.

As described above, according to the present invention, it becomes possible to read a document image and record the image on a recording material in real time, and also to record an image in both the main scanning direction and the sub-scanning direction with a simple configuration. The recording position can be moved.

In the above embodiments, only inkjet recording is used as the recording section, but digital recording such as thermal recording, electrostatic recording, laser beam recording, etc. can also be used.

[Brief explanation of drawings]

FIG. 1A is a top view showing the document table, FIG. 1B is a perspective view showing the document, FIG. 2A is a perspective view showing the reading section, FIG. 2B is a perspective view showing the recording section, and FIG. 4 is a waveform diagram of each part of the circuit diagram shown in FIG. 3, and FIGS. 5, 6, and 7 are margin control circuit diagrams, respectively. Here, 11 is a document table, 14 is a light receiver, 19 is a base, 27 is an inkjet head, 28 is a paper detector, 29 is a head supporter, 42 is a differential counting circuit,
43 is a margin designation circuit, 70, 90, 136 are margin shift switches, 75 is an A-D converter, 74, 9
6, 97, and 102 are flip-flops.

Claims (1)

[Scope of Claims] 1. A reading means for reading and scanning an original image in the main scanning direction, a moving means for moving the reading scanning position of the reading means in the sub-scanning direction, and storing an image signal output from the reading means. a reading means for reading an image signal from the storage means; and a reading means for recording an image on a recording material in parallel with reading and scanning of the original image by the reading means based on the image signal read from the storage means. recording means; a variable delay means for delaying either the start of movement of the reading scanning position by the moving means or the start of image recording by the recording means; and the image recording position on the recording material by the recording means. a setting means for setting the image recording position by the setting means, controlling reading of the image signal from the storage means by the reading means to move the image recording position in the main scanning direction; Recording position control means for moving the image recording position in the sub-scanning direction by controlling the amount of delay between the delay means starting to move the reading scanning position by the moving means and the start of image recording by the recording means. An image recording device characterized by: