JPS61285440A - Image forming device - Google Patents

Abstract

PURPOSE:To obtain a practically convenient image forming device by constituting the device so that an image non-formation part can be formed in accordance with requirement and a set image non-formation range can be easily checked. CONSTITUTION:A scale display part 130 is arranged along the longitudinal direction of a fixed scale 21 as the 1st optical display means. The scale display part 130 is constituted of plural liquid crystal display elements e.g. and each segment 1301 is selectively turned on in accordance with the copy enable range of the X direction which can be found out by the paper size and set magnification. When a binding margin setting key of the X direction is depressed and the binding margin is set up to t = 10mm in the minus direction, segments 1302 corresponding to the set width of the binding margin are turned on and off and a range specified by the segments 1302 indicates a range to be actually copied. Simultaneously, a setting display part 131 to be the 2nd optical display means displays the width of the binding margin quantitatively. thus, the practically convenient image forming device can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an image forming apparatus applied to, for example, an electronic copying machine.

(Technical background of the invention and its problems) As is well known, in recent years, electronic copying machines have a function of reducing or enlarging a document image, or a function of creating a non-forming area of an image to be used as a binding margin, etc. What we have is being developed. However, since conventional copying machines can only form binding margins in the scanning direction, for example, when reducing an A3 original and copying it to A4,
It was inconvenient that the binding margin could not be formed in the desired area.

In addition, with conventional copying machines, the set image non-formation range is only quantitatively displayed as a numerical value on the operation panel, so the operator is not aware of how the original image will be copied onto the paper. It was difficult to recognize.

Furthermore, since this display is displayed on the operation panel, the operator has to visually check both the document table and the operation panel when setting the MN on the document table, which poses a problem in operability.

[Object of the invention] This invention was made based on the above circumstances,
The purpose is to provide an image forming apparatus that can form non-image forming areas as required, and also allows easy confirmation of the set non-forming range of images. be.

[Summary of the invention]

This invention makes it possible to form a binding margin in a direction perpendicular to the scanning direction by, for example, making a variable magnification lens block movable along a fixed scale that serves as a reference for setting a document, and also makes it possible to form a binding margin in a direction perpendicular to the scanning direction. A scale display section is provided to display the forming range of the binding margin.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings.

FIGS. 4 and 5 schematically show an image forming apparatus of the present invention, such as a copying machine. That is, 1 is a main body of a copying machine, and a document table (transparent glass) 2 is fixed to the upper surface of the main body 1 to support a document. The document table 2 is provided with a fixed scale 2 that serves as a reference for setting the document, and furthermore, a rotatable document cover 11 and a work table 12 are provided near the document table 2. The original placed on the original platen 2 is exposed to an exposure lamp 4 and a mirror 5.
．． By reciprocating the optical system 6.7 in the direction of arrow a along the lower surface of the document table 2, exposure scanning is performed during the reciprocation. In this case, mirror 6.7 moves at half the speed of mirror 5 so as to maintain the optical exposure length. The light reflected from the original by the scanning of the optical system, that is, the light reflected from the original by the light irradiation of the exposure lamp 4, is reflected by the mirror 5.6.7, passes through the variable magnification lens block 8, and then passes through the mirror. 9 and guided to the photoreceptor drum 1o, and the image of the document is reflected by the photoreceptor drum 10.
The image is formed on the surface of the

The photoreceptor drum 10 rotates in the direction of arrow C in the figure, and is first charged for charging! 111, and the image is then exposed to slit light to form an electrostatic latent image on the surface. This electrostatic latent image is made visible by applying toner by a developing device 12.

On the other hand, the paper (image-forming object) P is taken out one by one from the selected upper paper feed cassette 13 or lower paper feed cassette 14 by the delivery roller 515 or 16, passes through the paper guide path 17 or 18, and then passes through the registration rollers. versus 19
and is guided to the transfer section by this pair of registration rollers 19. Here, the paper feed cassettes 13 and 14 are removably provided at the lower right end of the main body 1, and one of them can be selected from an operation panel to be described later. Incidentally, the cassette size of each of the paper feed cassettes 13 and 14 is detected by cassette size detection switches 601 and 602, respectively. This cassette size detection switch 601.6
02 is composed of a plurality of microswitches that are turned on and off according to the insertion of cassettes of different sizes.

The paper P sent to the transfer section comes into close contact with the surface of the photoreceptor drum 10 at the transfer charger 20, so that the toner image on the photoreceptor drum 10 is transferred by the action of the charger 20. . This transferred paper P is transferred to the peeling charger 2
1, the image is electrostatically peeled off from the photoreceptor drum 10 and conveyed by a conveyor belt 22, and is sent to a fixing roller 23 as a fixing device provided at the end of the conveyor belt 22, where the transferred image is transferred. It will be established. Then, the paper P after fixing is transferred to a tray 25 outside the main body 1 by a pair of paper ejection rollers 24.
It is becoming more and more popular. After the photosensitive drum 10 has been transferred, the charge is removed by the charger 26, residual toner on the surface is removed by the cleaner 27, and afterimages are roughly erased by the charge removal lamp 28, so that the photoreceptor drum 10 returns to its initial state. It's starting to go back. Note that 29 is a cooling fan for preventing the temperature inside the main body 1 from rising.

FIG. 6 shows the operation panel 30 provided on the main body 1. 301 is a copy key for instructing the start of copying; 302
is a numeric keypad for setting the number of copies, etc., 303 is a display unit that displays the operating status of each part and paper jams, etc., 304 is a cassette selection key for selecting the upper and lower paper feed cassettes 13 and 14, and 30s is the selected cassette. 30a is a magnification setting key for setting the enlargement/reduction magnification of the copy in a predetermined relationship, 307 is a zoom key for steplessly setting the enlargement/reduction magnification, and 308 is a display for displaying the set magnification. 30s is a density setting part for setting copy density. 30a and 30b are binding margin setting keys in the X direction;
30C130d is the binding margin setting key in the y direction, 30e13
Of is a light emitting display element indicating that each of the binding margin setting keys 30a to 30d has been operated.

FIG. 7 shows an example of the configuration of a drive source for each drive section of the copying machine configured as described above, and is composed of the following motors. That is, 31 is a lens motor, which is a motor for moving the position of the lens block 8 that performs magnification change. 32 is a mirror motor, which is a motor for changing the distance (optical path length) between the mirror 5 and the mirror 6.7 for changing the magnification. 33 is a scanning motor, which connects the exposure lamp 4 and mirror 5;
This is a motor for moving the mirror 6.7 for scanning the original. A shutter motor 34 is a motor for moving a shutter (not shown) for adjusting the charging width of the photosensitive drum 10 by the charger 11 during zooming.

A developing motor 35 is a motor for driving the developing roller of the developing device 12 and the like.

36 is a drum motor, which is a motor for driving the photosensitive drum 10. Reference numeral 37 denotes a fixing motor, which is a motor for driving the paper conveyance path 22, the pair of fixing rollers 23, and the pair of paper discharge rollers 24. 38 is a paper feeding motor, which is a motor for driving the delivery rollers 15 and 16. 39 is a paper feed motor;
This is a motor for driving the registration roller pair 19.

A fan motor 40 is a motor for driving the cooling fan 29.

FIG. 8 shows a drive mechanism for reciprocating the optical system. That is, the mirror 5 and the exposure lamp 4 are supported by a first carriage 411, and the mirror 6.7 is supported by a second carriage 422, and these carriages 411 and 412 are guided by guide rails 42s and 422 in the direction of arrow a. It can be moved in parallel. That is, 4
Phase pulse motor 33 drives pulley 43. An endless belt 45 is connected between the pulley 43 and the idler pulley 44.
The mirror 5 is placed in the middle of this belt 45.
One end of the first carriage 411 that supports the is fixed. On the other hand, the second carriage 42 supporting the mirror 6.7
Two pulleys 47 and 47 are rotatably provided on the second guide portion 46 and spaced apart in the axial direction of the rail 422.
A wire 48 is stretched between these pulleys 47, 47. One end of this wire 48 is fixed to a fixing part 49, and the other end is fixed to the fixing part 49 via a coil spring 50. Further, a first wire is provided in the middle of the wire 48.
One end of the carriage 411 is fixed. Therefore, as the pulse motor 33 rotates, the belt 45
rotates, the first carriage 411 moves, and the second carriage 422 also moves accordingly. At this time, since the pulleys 47, 47 serve as movable pulleys, the second carriage 422 moves in the same direction as the first carriage 411 at 1/2 the speed. Note that the first and second carriages 41
1,412 is controlled by switching the rotation direction of the pulse motor 33.

Further, on the document table 2, a copyable range corresponding to the specified paper is displayed. That is, if the paper size specified by the paper selection key 304 is (PX, PV) and the copy magnification specified by the magnification setting keys 30s and 307 is K, the copyable range (X, V) is rX-PX. /
K.J.

rV-PV/KJ. This copyable range (X, y)
As described later, the X direction is displayed on the scale 21, and the X direction is displayed on the light shielding plate 4 of the first carriage 411.
It is displayed by a moving scale 53 provided on the upper surface of 1a.

The first carriage 411 is moved to a predetermined position (
It is designed to move to a home position (according to the magnification). When the copy key 301 is pressed, the first carriage 411 is first moved toward the second carriage 412, and then the lamp 4 is turned on and moved away from the second carriage 412. When scanning of the original is completed, the lamp 4 is turned off and the first carriage 415 is returned to the home position.

FIG. 9 shows a drive mechanism for the variable magnification lens block 8. As shown in FIG. The motor 31 rotates a lead screw 61 disposed along the moving direction (X direction) of the first carriage 411. This lead screw 61 has a bushing 6 provided at one end of the board 62.
31 and 632 are screwed together, and the lead screw 61
When the is rotated, the substrate 62 is moved in the X direction.

A guide member 621 is provided at the other end of the substrate 62, and the guide member 621 is slidably engaged with the guide rail 64. Further, the substrate 62 includes a substrate 62 .
A movable body 65 is provided, which is movable in a direction (X direction) orthogonal to the above, and to which the variable magnification lens block 8 is attached. That is, supports 651. are provided at both ends of the moving body 65.
652 are provided, and these supports 651, 652 are guided and held by guide members 661, 662 provided on the base plate 62. Further, a rack 653 is provided on the side surface in the longitudinal direction of the support body 651, and a pinion 68 rotated by a pulse motor 67 provided on the base plate 62 is engaged with this rack 653. Therefore, the variable power lens block 8 is moved in the X direction by driving the motor 67. In addition, the micro switches 691 and 692 are connected to the substrate 62 and the moving body 6, respectively.
This is to detect the initial position of No. 5.

Next, the relationship between the operation of the variable magnification lens block 8 and the image formed will be explained. In FIG. 10(a), the focal length of the variable magnification lens block 8 is f, and the optical path length from the document table 2 to the variable magnification lens block 8 is ya1. Assuming that the optical path length is yb and the total optical path length from the document table 2 to the photosensitive drum 10 is yC, the optical formula is expressed as follows.

1/f-1/ya+1/yb Also, the magnification is expressed as +<-yb/ya. Focal path 11f of variable power lens block 8
is constant, so in order to focus when changing the magnification, it is necessary not only to change the total optical path length yC, but also to change ya or yb.
I understand that I have to change. This ya, yb
can be changed by moving the variable power lens block 8 in the X direction. Further, the total optical path length yc can be changed by moving the second carriage 412 and changing the position of the mirror 6.7.

On the other hand, as shown in FIG. 10 (1), the distances between the document table 2, the variable magnification lens block 8, and the photosensitive drum 10 are kept constant, and the variable magnification lens block 8 is moved by the motor 67 in the X direction, for example, by a distance. When moving by XL, the photosensitive drum 10
The upper image is moved by a distance x 2 given by the following equation.

X2-Xixyb/ya In the case of a same-size copy, it becomes X2-2Xt. In this way, by moving the transformation lens block 8 in the X direction, the center of the copied image can be moved.

FIG. 11 shows the overall control circuit, showing the main processor group 71 and the first . Second subbrocephus group 72.
It is mainly composed of 73. The main processor group 7
Reference numeral 1 denotes a high-voltage transformer 76 that detects input from an input device 75 such as an operation panel 30 and various switches and sensors, such as the cassette size detection switch 601 and 602, and drives the various chargers, the static elimination lamp 28, and the The blade solenoid 27a of the cleaner 27, the heater 23a of the pair of fixing rollers 23, the exposure lamp 4, and each of the motors 31 to 40.67 are controlled to perform the copying operation described above, and the scale display unit 13, which will be described later, is controlled.
0, it controls the display of the setting state display section 131 and the like.

Among the motors 31 to 40.67, motor 35.37
．． A toner motor 77 that supplies toner to the developing unit 40 and the developing device 12 is controlled by the main processor group 71 via the motor driver 78, and the motors 31 to 34 and 67
are controlled by a first sub-processor group 72 via seven pulse motor drivers, and motors 36, 39, and 38 are controlled by a second sub-processor group 73 via a pulse motor driver 80. Further, the exposure lamp 4 is controlled by the main processor group 71 via the lamp regulator 81, and the heater 23a is controlled by the main processor group 71 via the heater control section 82. Then, commands to drive and stop each motor are sent from the main processor group 71 to the first and second sub-processor groups 72 and 73. A status signal indicating the drive/stop state of each motor is sent from the second sub-processor group 72, 73 to the main processor group 71. The first sub-processor group 72 also includes a motor 3
Position sensor 83 that detects each initial position from 1 to 34.67
Location information has been entered from.

FIG. 12 shows an example of the configuration of the main processor group 71. That is, 91 is a one-chip microcomputer (hereinafter simply referred to as microcomputer), which detects human input of keys on an operation panel (not shown) and controls various displays via an input/output board 92. Furthermore, the microcomputer 91 is expanded by input/output ports 93-96. A high voltage transformer 76, a motor driver 78, a lamp regulator 81, and other outputs are connected to the input/output boat 93. A size switch for detecting paper size and other inputs are connected to the input/output boat 94. A copy condition setting switch and other inputs are connected to 95.

Note that the input/output port 96 is an option.

FIG. 13 shows an example of the configuration of the first sub-processor group 72. That is, 101 is a microcomputer, which is connected to the main processor group 71.

102 is a programmable interval timer for controlling the phase switching interval time of the pulse motor;
By setting a set value from 1, a count is performed based on the set value, and when the count is out, an end pulse is output to the interrupt line of the microcomputer 101. Said timer 10
2, a reference clock pulse is input. Further, the microcomputer 101 receives position information from the position sensor 83, and input/output ports 103 and 104.
is connected. The input/output boat 104 is connected to the motor 31 via the pulse motor driver 79.
~34.67 are connected. The input/output board 103 is used, for example, to output status signals of each pulse motor to the main processor group 71.

FIG. 14 shows the configuration of the second sub-processor group 73. That is, 111 is a microcomputer, which is connected to the main processor group 71. Numeral 112 is a programmable interval timer for controlling the phase switching interval time of the pulse motor, and when a set value is set by the microcomputer 111, it counts based on the set value, and outputs an end pulse when the count is out. This termination pulse is latched by the latch circuit 113, and its output is
11 interrupt lines and I/O port input lines. Further, an input/output boat 114 is connected to the microcomputer 111, and a motor 36, 38, 39 is connected to this input/output boat 114 via the pulse motor driver 80.
) is connected.

Figure 15 shows the control circuit of the pulse motor.
The input/output boat 121 (corresponding to the input/output boats 104 and 114 in Figs. 13 and 14) has a pulse motor driver 1.
22 (corresponding to the pulse motor drivers 79 and 80 in FIG.
4.36.38.39.67) windings A, B,
A and B are connected.

Figure 16 shows a method for controlling the speed of a pulse motor.

Figure (a) shows the speed curve of the pulse motor, and Figure (b) shows the speed curve of the pulse motor.
) indicates the phase switching interval. As is clear from this figure, the phase switching intervals are long at first, gradually shorten, eventually become equal intervals, and then gradually lengthen again until they stop. In other words, this indicates the through-up and through-down of the pulse motor, starting from the self-starting region, being used in the high-speed region, and finally falling down. In addition, tl, t2...
-tx indicates the phase switching interval time.

Next, the gist of the invention will be explained.

As shown in FIG. 1, the fixed scale 21, which serves as the reference for setting the original described above, has a first mark indicating the copyable range of the original.
A scale display section 130 as an optical display means is provided along the longitudinal direction of the two fixed scales. The scale display unit 130 is composed of, for example, a plurality of liquid crystal display elements, and each segment 1301 corresponds to the copyable range in the X direction determined by the above-mentioned paper size and set magnification. The lights are selectively turned on. In addition, Figure 1 shows all segments 1
A state in which 301 is lit is shown.

Further, in the center of the fixed scale 21, a setting state display section 131 is provided as a second optical display means.

This setting status display section 131 quantitatively displays the width of the binding margin set by the binding margin setting keys 30a to 30d in the X direction and the y direction, and is constituted by, for example, a liquid crystal display element.

In the above configuration, if a binding margin is not set, depending on the selected paper size and set magnification,
Segment 1301 of scale display section 130 is lit.

FIG. 2(a) shows an A4 size copy at the same size, and only the segments corresponding to the copyable range are lit. Display control of the scale display section 130 includes, for example, segments 1301.13 that are lit in accordance with the copyable range in the X direction determined from the copying magnification and paper size.
The position information of 0t may be stored in the memory 140, and this position information may be read out in accordance with the copyable range.

On the other hand, when the binding margin is set using the binding margin setting keys 308 to 30d, the width of the set binding margin is displayed on the setting status display section 131. In addition, on the scale display section 130, segments 1301 and 1301 indicating the set position of the original (segment + indicating the copyable range) are lit, and the segment 13 corresponding to the width of the set binding margin is lit.
02.1302 flashes. FIG. 2(b) shows a case where the binding margin setting key 30b in the X direction is operated to set the binding margin in the negative direction (downward in the figure) to t-10am, and the range indicated by the segment 1302 is This indicates the range that will actually be copied. Also, at this time,
The above-mentioned magnification changing lens block 8 is moved along the fixed scale 21 according to the width of the set binding margin, so that the formation position of the copy image on the paper is shifted.

After setting the binding margin in this way, when the copy key 301 is operated, the binding margin is formed corresponding to the shaded area.

Further, the second S(c) is the binding margin setting key 30 in the X direction.
This shows the case where the binding margin is set to t-10M in the plus direction (upward in the figure) by a.

When the binding margin is set in this way, the binding margin is formed in the hatched area in the figure.

Similarly, by operating the binding margin setting key 30C130d, the binding margin is set in the y direction, and the setting status display section 131 displays the width of the set binding margin.

According to the above embodiment, the variable power lens block 8 is movable along the fixed scale 21, and the binding margin can be formed not only in the y direction but also in the x direction as desired.

Therefore, for example, even when reducing an A3 original and copying it onto A4 paper, it is possible to easily form a binding margin without changing the setting position of the original.

Further, a scale display section 130 is provided along the longitudinal direction of the fixed scale 21, and a segment 1301 of the scale display section 130 is lit or blinked as appropriate to display the copyable range in the X direction and the binding margin. Therefore, it is possible to easily recognize the forming range of the binding margin.

Further, the fixed scale 21 is provided with a scale display section 130 and a setting state display section 131.
1, the set binding margin width is quantitatively displayed numerically.

Therefore, it is possible to visually confirm the formation range and width of the binding margin on the document table 2, resulting in good operability.

In addition, the scale display section 130 displays the copyable range and binding margin.
I am trying to use it for both purposes. Therefore, it is possible to reduce the number of parts.

Next, other embodiments of the invention will be described.

In FIG. 3(a), direction display sections 141 and 142 indicating the binding margin forming direction are provided near the setting state display section 131 of the fixed scale 21, and these direction display sections 141 and 142 indicate the binding margin. It is designed to be selectively lit according to the direction in which it is set. In other words, as shown in FIG. 3B, when the binding margin is set in the X direction, the direction display section
1 is lit and the binding margin is set in the y direction as shown in FIG. The direction in which the binding margin is set can be recognized. Even with such a configuration, it is possible to obtain the same effects as in the above embodiment.

Further, the scale display section 130, the setting state display section 131, and the direction display section 141.14°2 are not limited to liquid crystal display elements, but can also be constructed using, for example, light emitting diodes.

It goes without saying that various other modifications can be made without departing from the gist of the invention.

[Effects of the Invention] As detailed above, according to the present invention, it is possible to form a non-image forming area as required, and it is also possible to easily confirm the set non-forming range of an image. It is possible to provide a capable image forming apparatus.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the image forming apparatus according to the present invention, and FIG. 2 is a plan view showing only the main parts with some parts cut away showing various display sections, and FIG. 2 is a plan view showing the display operation. FIG. 3 shows another embodiment of this invention,
Figure (a) is a partially cutaway plan view showing various display sections, Figure (b) and Figure (C) are plan views shown to explain display operations, respectively, and Figures 4 and 5 are 4 is a perspective view of the image forming apparatus, FIG. 5 is a side sectional view, FIG. 6 is a plan view showing the configuration of the operation panel, and FIG. 7 is the configuration of the drive unit. Perspective views 1 and 8 are perspective views schematically showing the drive mechanism of the optical system, and Figure 9 is a perspective view showing only the main parts, showing the configuration of a variable power lens block.
Fig. 10 is a diagram showing the relationship between the operation of the variable magnification lens block and the image formed; Fig. 11 is a block diagram showing the overall control circuit; Fig. 12 is a block diagram of the main processor group;
Figure 3 is a configuration diagram of the first sub-processor group, and Figure 14 is a diagram of the second sub-processor group.
FIG. 15 is a schematic diagram showing the configuration of the sub-processor group, FIG. 15 is a schematic diagram showing the control circuit of the pulse motor, and FIG. 16 is a diagram for explaining the speed control method of the pulse motor. DESCRIPTION OF SYMBOLS 1...Main body, 2...Document stand, 21...Fixed scale, 30...Operation panel, 30a-30d...Setting keys, 10...Photosensitive drum, 71...Main processor Group, 130...Scale display section, 131...Setting status display section, 141.142...Direction display section, t...
・Binding allowance. Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 2 (a) Figure 2 (b) Second session (C) Figure 3 (a) Figure 3 (b) Figure 3 (C) Figure 4

Claims (4)

[Claims] (1) A scanning device that moves along the document table optically scans the document placed on the document table according to the set standard, and an image corresponding to the image of the document is formed on the charged image carrier. In an image forming apparatus that develops the image formed on the image carrier and transfers it to a transfer material, an image forming apparatus that is movable along the setting reference of the document and controls the imaging position of the reflected light image with respect to the image carrier. a changing means for changing, a setting means for setting a non-image forming position with respect to the transfer material, and an optical display provided at the setting reference of the document and displaying the non-image forming range set by the setting means. and a control means for operating the changing means and the optical display means in accordance with the operation of the setting means. (2) The image forming apparatus according to claim 1, wherein the optical display means blinks and displays the non-formation area of the image. (3) The image forming apparatus according to claim 1, wherein the optical display means comprises a liquid crystal display element. (4) The image forming apparatus according to claim 1, wherein the optical display means comprises a light emitting display element.