JPS6242666A - Image recording device - Google Patents

Abstract

PURPOSE:To automatically obtain a margin without dislocating an original placing position to an original platen by controlling the starting time of a light receiving device and the head supporting body. CONSTITUTION:When a copy starting switch 91 is depressed, for the reference signal generated by this and the delaying signal generated later than this, their starting time is controlled by using the starting signal of the base of the optical light receiving unit and the starting signal of the ink jet supporting body. A shifting quantity can be optionally changed by a shifting quantity setting device 92. At present, when the margin shifting is needed and a margin shifting switch 90 is depressed, a switch 95 selects the output of a delaying circuit 93 connected to a shifting quantity setting device 92. A polarity inverting circuit 98 inverts the output of flip-flops 96 and 97 by the left page start or the right page start, and outputs respectively a starting signal 109 to the optical unit base and outputs a stopping signal 110 to the head supporting body.

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 perforations for filing. In order to overcome this drawback, the user places the original on the document table with a margin for punching in advance. It was a unique project that required a lot of effort and care. Moreover, when copying a book such as a magazine, if the book cannot be placed beyond the original table (or the original holder gets in the way, or if the copying machine moves the original table), the original is This creates 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 tilted between the left and right pages. be.

For example, an example of this is shown in FIG. 1. FIG. 1 is a plan view of an original table 1 of a copying machine of an original moving table type that can copy up to 84-size originals. On this document table 1, the positions where the document should be placed are indicated by marks on recording paper of three different paper sizes.

Although not shown in the figure, it is assumed that a document table cover (a fulcrum for opening and closing) for holding a document on the document table 1 is installed on the upper side of the figure. 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, when copying the right page 3 of a 35 size or A4 size book 2 as shown in Figure 1B using A4 size recording paper, the right page 3 is located at the top and the left page 4 is located at the bottom in Figure 1. It must be placed so that it is located at the same position, and it must be placed slightly above the specified 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 tedious for the operator to copy with blank spaces, and it is also difficult to ensure a certain amount of blank spaces. Ta.

The present invention relates to a copying and recording apparatus that eliminates the above-mentioned conventional drawbacks, and one embodiment thereof will be described below with reference to the drawings.

FIG. 2 is a schematic diagram of a copying and recording apparatus to which the present invention is applied. It consists of a recording section that records information on paper.

As shown in FIG. 2A, an original table 11 made of glass ζ 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 rod-shaped light source 12 that illuminates the document.
A reflecting mirror 13 is provided so that the light emitted from the light source can effectively illuminate the document table 11, a light receiver 14 has a large number of light receiving elements arranged in a straight line, and image information on the document is displayed on the light receiver 14. An optical unit consisting of an optical lens 15 for forming an image 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), the information of the document placed on the document table 11.4 is sequentially imaged onto the light receiver 14, and if the light-receiving elements are sequentially read out (main-scanning), The device 14 can obtain sequential pixel signals obtained by raster scanning the original.

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) in its circumference by setting the internal pressure of the drum to a negative pressure rather than 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) A recording head, for example, an inkjet head 27 is provided on a head support 29 together with a paper detector 28 that detects the edge of the recording paper 21 wound around the drum 22 . The paper detector 28 may detect the difference in light reflection between the paper and the drum using, for example, a combination of a light emitting element and a light receiving element (photo interrupter). The head support 29 is slidably provided on a guide rail 30, and is moved forward in the S direction or backward in the anti-S direction in FIG. 2(B) by a screw 32 which is rotated by the drive of a motor 31. In order to prevent bearings, jitter, etc. in the recorded image, it is preferable that the motor 31 rotates in synchronization with the rotation of the drum 22, and preferably driven by the same clock source as the motor 24.

Alternatively, power may be mechanically transmitted from the rotation of the drum 22 to the screw 32 using a gear, 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 ink sheet 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 apparatus shown in FIGS. 2A and 2B, the base 19 of the optical unit moves in the Q direction while repeatedly raster scanning the information on the document table in the P direction. At this time, the drum of the recording section rotates in the R direction, and one line of raster-scanned image information is recorded on the 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 sent to gE &
The information is sent to one ink head 27 and recorded in parallel with reading, but it is also possible, for example, to file information for one page of a document that has been read once in memory and then record it again.

The photodetector 14 consists of a number of photodetection elements that convert optical input into electrical signals, and can process these signals in time series.
There is. 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 differential stitch count circuit 4
2 is a reference signal derived from the output pulse of the paper detector 28 and one rotation of the rotary encoder, that is, a zero signal 6
The phase difference of 1 is the clock signal 62 of the rotary encoder.
It is counted at

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 while the drum is rotating before copying starts, and thereafter, the leading and trailing ends of the paper are determined by the output of the rotary encoder 33 throughout the recording of one sheet. Therefore, the difference counting circuit 42 is the copy start circuit 4
When the copy start signal 64 is generated from 1, the drum 22
It operates during the time required for one rotation, and during this period, the interval between the zero signal 61 of the rotary encoder 33 and the starting and ending edges of the paper detected by the paper detector 28 is counted.

This operation will be explained using the timing diagram shown in Figure 4.
The zero signal 61 is a pulse signal that is generated once per rotation of the rotary encoder 33, that is, once per rotation of the drum 22, as shown in FIG. (Figure 4C)
Assume that 2048 pulses are generated. On the other hand, a paper detector 28 provided on the head support 29 detects the difference in reflected light between the recording paper 21 and the drum 22, and detects a low level for the recording paper and a high level for the drum. A signal is output to the signal line 63. As shown in the fourth diagram, while the paper detection signal is at a high level (T3 in the fourth diagram), the section b on the drum in FIG. 2B is 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 the result onto the signal line 67 ST.
, the distance T2 between the zero signal 61 and the trailing edge of the recording paper is counted, and an output ED is output. The margin designation circuit 43 can set an arbitrary dental 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 sent on the signal line 69. It is derived.

The addition/subtraction circuit 44 is capable of 12-bit addition/subtraction operations.
The differential old school circuit 12 outputs ST and margin designation circuit 1
3 is added or subtracted from the number set in step 3 using Ll based on the command signal, and the result is output to the input terminal 1) of counter 15. On the other hand, the output ED of the differential stitch count circuit 42 remains unchanged at the preset input terminal P of the counter 46.
Connect to 2. The counter 45 and the counter 46 are 20
It is a 48-ary counter, 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. Further, counters 45 and 46 are connected to galley (carry) terminals CTI for deriving carry output in decimal 2048.
, CT2. In the case of the counter 45, the number set by the margin designation circuit 43 is added or subtracted from the output ST corresponding to the position of the leading edge of the recording paper, and the paper detector 28 also adds or subtracts the number set by the margin designation circuit 43 to the output ST corresponding to the position of the leading edge of the recording paper. A carry output CTI 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 the set, reset, and flip-flop 47, respectively, and the output terminals of the flip-flop 47 receive the signals shown in FIG. 4E. As can be seen from Fig. 4E, the signal at the output terminal F-Q is 1 from the leading edge of the paper.
``After a delay of 4 hours, it becomes high level and becomes low level at the trailing edge of the paper. By using this signal as an enable signal for the ink sheet head, the margin designating circuit 4
By changing the setting value 3 and changing 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 the recording section in the third drawing, the light receiver 14 is, for example, a CCD sensor, which includes a clock circuit, shift 1 clock, reset clock, start pulse, etc. will be granted. The output of the CCD sensor sensor constituting the light receiver I4 is transferred to the memory section M via the binarization circuit 49 and the buffer T circuit 50. Memory section h=i includes two input switch circuits 52, output switch circuit: 53.2 line memories 54.55
and a memory control circuit 51 that controls these. The line memory 54 and the line memory 55 are 2048-bit memories each, and the memory control circuit 5 controls the line memory 54 and the line memory 55 so that when one is in the input mode, the other is in the output mode.
Controlled by 1. Correspondingly, the input switch circuit 52 is configured to input data to the line memory in the input mode.
is selected, and the output switch circuit 53 is selected so that the data of the line memory in the output mode is output. In addition, the CCD reset clock RC on the signal line 66 is used for the input memory, and the rotary clock RC is used for the output memory.
Synchronization is achieved with the clock signal 62 of the encoder, and human output is performed. Furthermore, the output timing of the output memory is controlled by the output of the flip-flop 47 on the signal line 65, 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 with reference to FIG. The margin specifying circuit 43 is a circuit that generates a shift amount corresponding to the margin in a diisotal manner, 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. A.D.
The converter converts the signal into, for example, an 8-bit digital signal, and a copying and recording apparatus with a resolution of 8 pixels/mm can print a maximum of 32 mm. In this example, the 8-bit digital signal was configured to be connected to the 8 bits from the lower hit (LSB) of the 12-hit adder/subtracter circuit 44, but in principle, if you do this (from bit I to bit 8), can be shifted in units of 1 bit = 0.125 mm. Such high precision is not necessary for practical use, so for example, if you use a 4-bit A/D converter and connect its output from bit 5 to bit 8 of the adder/subtractor circuit 44,
It has the advantage of being able to shift up to 32 mm in units of m and m, and requiring only a 4-bit AD converter.

If a larger shift amount is desired, an AD converter with a larger number of bits may be used, or the output of the AI 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 0, and when the margin shift switch 70 is pressed, the AD
The output of the converter 75 is passed through the signal line 68 to the addition/subtraction circuit 4.
4. If the margin shift switch 70 is not pressed, the selector switch 77 sends digital zero from the zero signal generator 76 to the addition/subtraction circuit 44 via the signal line 68.
is applied to

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 sequence through a signal line 69.

This involves moving the right vane of the book and the open book whose left page is to be copied in parallel on the manuscript table. If you have to turn the book upside down every time, you can place the margin not only at the leading edge of the recording paper (left page), but also at the back edge (right page), in which case you can This is because operations are also required.For the reasons mentioned above, this embodiment is configured so that the addition/subtraction is specified to the addition/subtraction circuit 44.

Instructions for addition and subtraction are given by setting the newsletter line 69 to high level (addition) or low level (subtraction). Copy switch 72 for devices that require addition and subtraction
Flip-flop 74 so that it is reversed every time you press .
will be established. At this time, it is first necessary to specify whether to start from the left or right page, and kneading is performed by selecting the left page start switch 78 and the right page start switch 79.

When the left page start switch 78 is on, the selector switch 80 is selected to obtain the output Q of the flip-flop 74, and when the right page start switch 79 is on, In this case, the output page is selected to obtain the output page.

When any one of the left page start switch 78, right page star) switch is selected, the output of the AND game 1-81 becomes low level,
(Switches 78 and 79 are in the ON state and are at low level.
It is assumed that a high level is output in the F state. ) selector switch 82 applies the output of flip-flop 74 to addition/subtraction circuit 44; Next, press the clear switch 73 to clear the flip-prop 74 (Q = color bell) (this clear switch can be set before pressing the right/left page start switch), and then start copying.
When the switch 72 is pressed, if the left page start switch 78 is on, the signal line 69 will be set to /%I level (addition command), and if the right page start switch 79 is on, the signal line 69 will be set to low level (addition command). A 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 selector switch 82 selects the power supply voltage 83 and always outputs an addition command.

What has been described above is the case where an A4.84 size document is copied onto A4 recording paper using the document table shown in FIG.

Next, a case will be described in which a 35-size book is copied onto 35-size recording paper using the manuscript table shown in FIG. In this case,
The method of placing the original is 90 degrees different from the above case, and the vertical and horizontal directions are reversed. When creating a margin, instead of applying a delay for each scanning line, the document is placed on the receiver 14 and the head support. 2
What is necessary is to control the start time of No. 9.

That is, when copying a 35-size document using the document table shown in Figure 1, if you want to create a margin on the left side of the recording paper, you should first insert the head support 29, and conversely, if you want to create a margin on the right side of the recording paper, The light receiver 14 may be moved 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 inkjet head. 27 for the start signal of the support 29, the base 19 and the support 2
This is to control the start time of step 9.

Which of the base 19 and the support 29 should be started first is determined by pressing the cloth page start switch 1 in the same way as in the example of Fig. 5.
00 and right page start switch 101 is turned on first.

When the left page start switch 100 is on,
With the changeover switch 103, the output Q of the flip-flop 102 is turned on, and the right page star i...switch 101 is turned on.
In this case, output Q is selected. This left page start switch 100, right page start switch 1
If one of 01 is selected, AND gate 1
The output of 05 becomes low level, and the changeover switch 106
outputs the output of the changeover switch 103, that is, the output of the flip-flop 102 (99 is a switch that generates a clear signal to clear the flip-flop 102) to the control terminal 111 of the polarity inversion circuit 98.

On the other hand, the shift bone can be arbitrarily changed by a shift [-ffi setting device 92 consisting of a variable resistor, and this setting device 92 is connected to a delay circuit 93. The delay circuit 93 is, for example, a circuit consisting of a monostable multivibrator, and the shift position setting device 92 is used as a resistor for determining the time constant of this oscillation. 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 transmits the delay signal to the set terminal S of the set/reset flip-flop 96.

In addition, the copy start signal, which serves as the reference signal, is directly transmitted to the second
is applied to the set terminal S of the set/reset flip-flop 97. These two sets/resets 1
The flip-flops 96 and 97 are reset by a stop signal from the 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. .

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

If the left page start switch 100 is currently on, when the copy start switch 91 is pressed,
The output Q1 of the flip-flop lO2, that is, the high level, is applied to the control terminal 111 of the changeover switch 106. 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 an optical unit base start signal and the output terminal 110 is used as a 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. Further, every time the copy start switch 91 is pressed thereafter, the polarity reversal 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. Star 1~・Switch 100 and right page・
Since it is not necessary to press any of the start switches 101, the output of the AND gate l05 becomes high level, the selector switch 106 selects the power supply voltage 104, and the control is activated regardless of the number of times the copy start switch 91 is pressed. Terminal 111 always maintains a high level.

Therefore, a margin can always be obtained at the left end of the recording paper.

When margin shift is not required, the margin shift switch 90 is in the OFF state, and the selector switch 95 directly transmits the signal from the copy start switch 9I to the flip-flop 96, so that the optical unit base and head support are start at the same time.

Above, we have described an example in which 34-size and A4-size recording paper is used (Figure 5) and an example in which 85-size recording paper is used (Figure 6) on the manuscript table shown in Figure 1. FIG. 7 shows a circuit that automatically selects these two circuits based on a copy size signal.

The circuit in FIG. 7 includes a switch 130 for specifying B4 size copy paper, a switch 131 for specifying A4 size copy paper. When one of the B5 size designation switches 132 is selected and one of the margin shift switches 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 (the output is at a low level), the OR gate 133 is at a low level, and at this time,
Since the margin shift switch 136 is on, that is, at a low level, the OR game 1-134 outputs a low level.

At this time, the switch 132 is at high level, so the OR
The output of gate 135 is at a high level. The output of the OR gate 134 is connected to the circuit 4 via the signal line 137 in FIG.
3-1 The output of 1-135 is connected to the signal line + in Figure 6.
38 to the circuit 112. Therefore, B
When copying 4 or A4, the circuit shown in FIG. 5 is selected, whereas when copying B5, the circuit shown in FIG. 6 is selected. Also, when the margin shift) switch 136 is in the off state, the outputs of the OR Kate 134 and +35 are both high level,
Neither the circuits in FIGS. 5 nor 6 perform margin shift.

As described above, according to the embodiment shown in FIG. 7, by selecting the copy size, one of the two margin software methods shown in FIGS. 5 and 6 is automatically selected. Also,
The margin shift amount setters 71 and 92 in FIGS. 5 and 6 can be configured by appropriately selecting circuit constants such as a copy start switch 72.91° and a clear switch 73.99.
, the left page start switch 78.100, and the right vane start switch 79.101 can be used as they are.

As described above, it is possible to automatically provide an arbitrary amount of blank space on recording paper.

In the second embodiment, 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 the drawing]

FIG. 1(A) is a top view showing the document table, FIG. 1(B) is a perspective view showing the document, FIG. 2(A) is a perspective view showing the reading section,
FIG. 2(B) is a perspective view showing a recording section, FIG. 3 is a circuit diagram of a copying/recording apparatus according to the present invention, FIG. 4 is a waveform diagram of each part of the circuit diagram shown in FIG. 3, and FIG. 5 is a diagram. 6 and 7 are margin control circuit diagrams, respectively. Here, 11 is a manuscript table, 1ll 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 stitch count circuit, 43 is a margin designation circuit, 70. 90. 1.36 is the margin shift switch,
75 is an A-D converter, 74.96.97. 102 is a flip-flop. Patent applicant: Canon Co., Ltd. Figure 1 (A) Figure 7 (B) Figure 2 (A) Male? Figure, (6)

Claims (1)

[Claims] a reading means for reading and scanning the 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; a recording means for recording an image on a recording material in parallel with the reading scan; a commanding means for commanding the moving direction of the recording position of the original image on the recording material; An image recording apparatus comprising a recording position control means for recording on a recording material by moving in either one of a scanning direction and a direction opposite to the sub-scanning direction.