JPS6262349A - Image forming device - Google Patents

Abstract

PURPOSE:To make selection of the basis of setting of an original free and make selected basis of setting easily visible by indicating the extent that can be copied by a pointer corresponding to the basis simultaneously with selection of basis of setting the original. CONSTITUTION:When a corresponding set reference setting key is operated, the center reference etc. is selected. When paper size, variable magnification etc. are set under this condition, pointers 51a, 52a of fixed scale 2a for center reference side of an original platen 2 move according to setting and the extent that can be copied is indicated and this is visible through a transparent scale 2a. The same applies to the case where one side reference is set, and the extent that can be copied is indicated by the pointer 51b. Thereby, reference of setting of the original can be selected freely, and the extent that can be copied for the reference becomes easy to see.

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, some electronic copying machines have a document set at the center of the document table, and others set the document on one side of the document table. Since the setting standards for these originals are fixed by the copying machine, it is fine if the user uses a copying machine with which the setting standards are familiar, but if not, it may be difficult to use because the setting standards are different from normal ones. There is,
In some cases, there is a problem in that a copying error occurs, such as an image being formed only on a portion of the paper.

[Object of the invention] This invention was made based on the above circumstances,
The purpose is to provide an image forming apparatus that is capable of selecting a document setting standard, easily recognizing the selected setting standard, and preventing copying errors. It is something.

(Summary of the Invention) This invention provides, for example, fixed scales on both ends of a document table with fixed scales in which the document cellar 1 to the reference is centered, and a fixed scale in which the document setting reference is on one side, and the back side of these fixed scales. Each copy is provided with a guide, and the set standard for the selected original and the copyable range of the original are displayed using the guide.

[Embodiments of the invention]

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

FIGS. 5 and 6 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. At both ends of the document table 2 are fixed scales 21.2 on which the standards for setting the document are indicated.
Further, near the document table 2, a document cover 11 and a work table 12, which can be opened and closed, are provided. The original placed on the document table 2 is placed on the document table 2 by an optical system consisting of an exposure lamp 4 and mirrors 5, 6, and 7.
By reciprocating in the direction of arrow a along the lower surface of the lens, exposure scanning is performed during the reciprocating movement. In this case, mirror 6.7 is connected to one side of mirror 5 to maintain the light exposure length.
Move at a speed of /2. 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 10, so that an image of the document is formed on the surface of the photoreceptor drum 10.

The photosensitive drum 10 rotates in the direction of arrow C in the figure, and the surface is first charged by a charging device 11, and then an image is exposed to slit light to form an electrostatic latent image on the surface. This electrostatic latent image is made visible by applying toner by developer@12.

On the other hand, the paper (material to be transferred) P is taken out one by one from the selected upper paper feed cassette 13 or lower paper feed cassette 14 by the delivery O-ra 15 or 16, passes through the paper guide path 17 or 18, and is registered. It is guided to a pair of rollers 19, and guided to a transfer section by this pair of resistors 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. Each of the paper feed cassettes 13 and 14 has a cassette size detection switch 60.
The cassette size is detected by 1.602. This cassette size detection switch 60z, 60
Reference numeral 2 is composed of a plurality of microswitches that are turned on and off in accordance with 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, paper P after fixing
is arranged to be placed on a tray 25 outside the main body 1 by a pair of paper ejection rollers 24. 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 initial state is maintained. It is now back to . Note that 29 is a cooling fan for preventing the temperature inside the main body 1 from rising.

FIG. 7 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. 306 is a magnification setting key for setting the copy enlargement/reduction magnification in a predetermined relationship, 307 is a zoom key for steplessly setting the enlargement/reduction magnification, and 3011 is a display for displaying the set magnification. , 309 is a density setting section for setting the copy density, 30a and 30b are each a document setting standard setting key, and 30C130d is a setting standard setting key 3.
0a and 30b are light-emitting display elements indicating that they have been operated.

FIG. 8 shows an example of the drive source configuration of each drive unit 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.

35 is a developing motor, and the developing motor 35 is a developing motor of the developing device 12.
This is a motor for driving a motor, etc.

36 is a drum motor, and the photosensitive drum 10
This is a motor for driving. A fixing motor 37 is a motor for driving the paper transport path 22, the fixing roller pair 23, and the paper ejection roller pair 24. 38 is a paper feed motor, which is a motor for driving the delivery rollers 15 and 16. A paper feeding motor 39 is a motor for driving the registration roller pair 19.

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

FIG. 9 shows a driving mechanism for reciprocating the optical system. That is, the mirror 5 and the exposure lamp 4
is supported by a first carriage 411, and mirror 6.7 is supported by a second carriage 422, respectively, and these carriages 411, 412 are guided by guide rails 421, 422 and can freely move in parallel in the direction of arrow a. 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 guide portion 4Q of the second guide part 4Q, spaced apart in the axial direction of the rail 422,
A wire 48 l) is passed 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, one end of a first carriage 411 is fixed to a midway portion of the wire 48. Therefore, as the pulse motor 33 rotates, the belt 4
5 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. In addition, the first and second carriages 4
The moving direction of 11.412 is controlled by switching the rotation direction of the pulse motor 33.

FIG. 10 shows a drive mechanism for the variable magnification lens block 8. As shown in FIG. The motor 31 is connected to a first carriage 411
A lead screw 61 arranged along the moving direction (y direction) is rotated. Bushes 631 and 632 provided at one end of the board 62 are screwed into this lead screw 61.
1 is rotated, the substrate 62 is moved in the y 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 and 652 are guided and held by guide members 661 and 662 provided on the substrate 62. Further, a rack 653 is provided on the longitudinal side surface of the support body 651, and a pinion 68 rotated by a pulse motor 67 provided on the base plate 62 is meshed with this rack 653. Therefore, the variable power lens block 8 is moved in the X direction by driving the motor 67. Note that 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. 11(a), the focal length of the variable power lens block 8 is f, the optical path length from the document table 2 to the variable power lens block 8 is ya, and from the variable power lens block 8 to the photosensitive drum 10. When the optical path length of 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/Va+1/yb Also, the magnification is expressed as -yb/ya. Since the focal length of the variable magnification lens block 8 is constant, 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. . This ya%yb
can be changed by moving the variable power lens block 8 in the y 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. 11(b), 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 in the X direction by the motor 67, for example, by a distance x1. , the image on the photosensitive drum 10 is moved by a distance x 2 expressed by the following equation.

X2-Xi xyb/ya Also, in the case of full size copying, it becomes x2 force 2Xt. In this way, by moving the variable magnification lens block 8 in the X direction, the center of the copied image can be moved.

FIG. 12 shows the overall control circuit, showing the main processor group 71 and the first . Second sub-processor group 72.
It is mainly composed of 73. The main processor group 7
Reference numeral 1 indicates an operation panel 30 and various switches and sensors, such as the cassette size detection switch 60r and 602.
input devices such as

A high-voltage transformer 76 that detects input from 75 and drives the various chargers, the static elimination lamp 28, and the cleaner 2.
7, the heater 23a1 of the Iltl fixed roller pair 23, the exposure lamp 4, and each of the motors 31 to 40, etc., to perform the copying operation described above, and to control the motors 58t and 582.67. Then, an operation of moving the original image is performed in accordance with the original setting standard, which will be described later.

Among the motors 31 to 40,581.582.67,
A toner motor 77 that supplies toner to the motors 35, 37, 40 and the developing device 12 is controlled by the main processor group 71 via a motor driver 78, and
34 and 67 are controlled by the first sub-processor group 72 via a pulse motor driver 79, and the motor 36.3
9°3B, 581.582 is pulse motor driver 8
0 and is controlled by the second sub-build O setter group 73. 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, from the main processor group 71, the first. Second
Commands to drive and stop each motor are sent to the sub-processors 72 and 73, and the first. 2nd subprocessor group 72.73
A status signal indicating the drive/stop state of each motor is sent from the main processor group 71 to the main processor group 71. Further, the first sub-processor group 72 receives position information from a position sensor 83 that detects the initial positions of the motors 31 to 34.67.

FIG. 13 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 h-board 92. Further, the microcomputer 91 is expanded by input/output ports 93-96. The input/output boat 93 is connected to a voltage transformer 76, a motor driver 78, a lamp regulator 81, and other outputs, and the input/output boat 94 is connected to a size switch for detecting paper size and its value input. The output port 95 is connected to a copying condition setting switch and its value input.

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

FIG. 14 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. Furthermore, the microcomputer 101 receives position information from the position sensor 83 and is connected to input/output boats 103 and 104. The input/output boat 104 is connected to the motors 31 to 31 through the pulse motor driver 79.
34.67 is connected. In addition, the input/output boat 1
03 is used, for example, when outputting the status signal of each pulse motor to the main processor group 71.

FIG. 15 shows the configuration of the second sub-a setter group 73. That is, 111 is a microcomputer, which is connected to the main processor group 71. 112 is a programmable interval timer for the phase switching interval time rmtue of the pulse motor, and when a set value is set by the microcomputer 111, it counts based on it, and outputs an end pulse when the count is out. This termination pulse is latched by the latch circuit 113, and its output is supplied to the interrupt line and input/output board input line of the microcomputer 111. In addition, the microcomputer 111 also has an input/output board 1.
14 is connected to this input/output boat 114, and motors 36 and 38 are connected to it via the pulse motor driver 80.
．． 39.58r, 582 are connected.

Figure 16 shows the control circuit of the pulse motor.
The input/output boat 121 (corresponding to the input/output boats 104 and 114 in FIGS. 14 and 15) has a pulse motor driver 1.
22 (corresponding to the pulse motor driver 79.80 in FIG. 12) is connected to the pulse motor driver 122, and the pulse motor 123 (the pulse motor 31 to 34.
．． 38.39.58s, 582.67) each winding A.

B, A, and 8 are connected.

FIG. 17 shows a method for controlling the speed of a pulse motor. FIG. 3(a) shows the speed curve of the pulse motor, and FIG. 1(b) shows the phase switching interval.

As is clear from this figure, the phase switching interval is long at the beginning;
They gradually shorten, eventually become evenly spaced, and then gradually lengthen again and 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. Note that tl, t2, . . . tx indicate the time of the phase switching interval.

Next, the gist of the invention will be explained.

In this invention, the document setting reference is the setting key 30a.
, 30b.

That is, when the setting key 30a is operated, the document setting reference is set to the center of the fixed scale 21 of the document table 2, and when the setting key 30b is operated, the document setting reference is set to one side of the fixed scale 22. is selected, and the copyable range of the original according to the copy magnification is displayed only on the selected fixed scale side. That is, as shown in FIG. 1, the fixed scales 2s and 22 are provided with transparent portions 2a and 2b, respectively, corresponding to the document set position, and pointers 51a and 5 are provided on the back side of the transparent portions 2a.
2a is movably disposed, and a pointer 51b is movably disposed on the back side of the transparent portion 2b.

FIG. 2 shows the driving configuration of the hands 51a, 52a, and 51b. These guidelines 51a, 52a.

Of the 51b, the pointers 51a and 52a are the pulleys 54a and 5
5a via a spring 56a. The pulley 55a is rotated by a motor 581, and the distance between the pointers 51a and 52a is changed by rotating the motor 581 according to the paper size and magnification as described later. It looks like this. Further, as shown in FIG. 2, the pointer 51b is connected to a wire 57b which is connected to the pulleys 54b and 55b via a spring 56b.
It is set in. The pulley 55b is set to be rotated by a motor 582.
The rotation of the pointer 51b and the fixed scale 22 are driven according to the paper size and magnification as described later.
The mutual distance between the two ends and one end can be changed.

The above copyable range is determined as follows. Select the paper size specified by the cassette selection key 304 (
Px, Py) and the copy magnification specified by the magnification setting keys 30g and 307 is K, then the copyable range (
X, 'j) becomes [x-PX/Kl, ry-Py/KJ. Of this copyable range (x, y), the X direction is indicated by the pointers 51a, 52a, and 51b provided on the back of each of the fixed scales 2 and 22 of the document table 2, and the y direction is indicated by the The scale 53 provided on the top surface of the 1 carriage 411 is used to display the information.

FIG. 3 shows an example of the display of the document setting standard and the copyable range according to the operation of the setting keys 30a130b. In the figure, (a) and (b) respectively indicate the setting key 3.
0a is operated and the same-size copy is set; in this case, the hands 51a, 52
Only point a is visible through the transparent portion 2a, and the pointer 51b is moved to a position other than the transparent portion 2b so that it is not visible from the transparent portion 2b. Here, FIG. 10A shows a case where an A4 original is set, and FIG. 2B shows a state where an 85 original is set.

The fixed scale 21 has X
The copyable ranges in each direction are displayed, and are visible through the transparent portion 2a.

Also, the scale 5 of the first carriage 411 is mounted on the document table 2.
The copyable range in the y direction is indicated by the distance between the fixed scale 21 and the fixed scale 21, respectively.

On the other hand, FIGS. 3(c) and 3(d) show the setting keys 30, respectively.
b is operated and the same-size copy is set; in this case, only the pointer 51b is visible from the transparent section 2b, and the pointers 51a and 52a are visible from the transparent section 2a. It is moved to the position shown in FIG. Here, FIG. 5C shows a case where an A4 original is set, and FIG. 1D shows a state where a B5 original is set. The copyable range in the X direction is displayed on the fixed scale 22 by a pointer 51b, which is visible through the light-transmitting portion 2b. Further, on the document table 2, a copyable range in the y direction is indicated by the distance between the scale 53 of the first carriage 411 and the fixed scale 22.

Next, the operation of the variable magnification lens block 8 in accordance with the document setting standard will be explained. In this embodiment, the paper is fed so that the center of the fixed scale 21 and the center of the paper coincide. In this state,
As described above, the setting key 30a is operated, and as shown in FIG.
) As shown in (b), when the reference for setting the original is set at the center of the fixed scale 21, the center of the original matches the center of the paper P even if the copying magnification is equal to or reduced. Therefore, the variable magnification lens block 8 moves according to the set copying magnification as indicated by the arrow y as shown in FIG. 3(a).
It is moved only in the direction, not in the X direction. Also,
When the setting key 30b is operated and the document setting standard is set to one side of the fixed scale 22 as shown in FIG. The center of the paper P does not match the center of the paper P.

Therefore, the variable magnification lens block 8 is moved in the X direction and the y direction according to the copy magnification set by the magnification setting key 306 and the paper size selected by the cassette selection key 304, and is moved to the fixed scale. 21
The document image is formed at the center of the supplied paper with the center of the paper as a reference.

That is, the amount of movement of the variable magnification lens block 8 is determined as follows. As shown in FIG. 4, the distance from the center of the document table 2 to one end of the fixed scale 2X is XQ, the length from the center of the paper P to one end is X2 (-P/2),
The moving distance of the variable magnification lens block 8 according to the set magnification is calculated by comparing the moving distance of the variable magnification lens block 8 at y1 equal magnification (shown by a solid line) and the variable magnification lens block 8 at a predetermined copying magnification (indicated by a dotted line). ) and the optical axis of the variable magnification lens block 8 shown by the solid line is θ.
, if the distances between the magnification changing lens block 8, document table 2, and paper P shown by dotted lines are a and b, respectively, the relationship between these is (Xa + X2)/ (a+b) - (x2 + ytanθ)/b The focal length f of the lens block 8 is 1/a+1/
b-1/f The magnification ratio is: K richness/a Solving the above equation, it can be seen that it is expressed by the relationship X-F (K, Xo, f, P). Here, Xll
, f is a constant determined by the copying machine, so the above equation can be transformed into X-F (K, P). That is, it can be seen that the moving distance X of the variable magnification lens block 8 along the fixed scale 2X4 is determined by the variable magnification ratio and the paper size. In other words, once the magnification ratio and paper size are set, the movement l of the magnification block 8 can be determined. The method of moving this variable magnification lens block 8 is x=F (K%P
) is stored in a storage unit such as a ROM, and when the variable magnification K and paper size P are input,
The stored number of pulses may be read out in accordance with this input information, and the motor 67 may be driven in accordance with this number of pulses.

Next, exposure scanning of a document by the first carriage 411 will be described. As described above, when the setting key 30a or 30b is operated to select the document setting standard and the document is set on the document table 2 accordingly, the copy key 301 is operated to operate the first carriage 411, etc. and the copying operation described above is performed. At this time, if the reference for setting the original is on the fixed scale 21 side as shown in FIGS. It is moved toward the fixed scale 21, and then the lamp 4 is turned on and moved away from the fixed scale 21. When scanning of the original is completed in this way, the lamp 4 is turned off and the first carriage 411 is returned to the position shown in FIGS. 3(a) and 3(b).

Further, when the setting key 30b is pressed, the first carriage 411 first lights up the lamp 4 at the copyable range display position shown in FIGS. The document is scanned by moving in 22 directions. When scanning of this document is completed, the copyable range display position is returned.

According to the embodiment described above, setting reference setting keys 30a and 30b for specifying the document setting position are provided so that the user can specify the document setting position number as required. Therefore, since it is possible to perform copying at a familiar original setting position, it is possible to prevent copying errors due to incorrect setting of the original.

In addition, the fixed scale 21 is provided with pointers 51a and 52a, and the fixed scale 22 is provided with a pointer 51b, and these pointers 518, 52a, and 51b are attached to the transparent portion 2a1 of the fixed scale 21.22 only on the set reference side of the selected document.
It is more visible than b. Therefore, it is possible to easily recognize the setting criteria and the setting position of the selected original, and it is possible to prevent mistakes in setting the original.

Furthermore, the variable magnification lens pro, Tsuku 8, original setting standard setting keys 308, 30b, and magnification setting key 306,
It can be moved according to the operation of the cassette selection key 304,
The image is always formed in the center of the paper. Therefore, even if the document setting standard changes, the paper can be fed with the center standard, and there is no need to replace the cassette.

Note that this invention is not limited to the above embodiments,
Of course, various modifications can be made without departing from the gist.

[Effects of the Invention] As described in detail above, according to the present invention, it is possible to select a document setting standard, and the selected setting standard can be easily set, thereby preventing copying errors. It is possible to provide an image forming apparatus capable of

[Brief explanation of drawings]

Fig. 2 is a perspective view schematically showing the pointer drive mechanism; Fig. 3 is a plan view of the main part shown to explain the document setting standard and copyable range. 4 are schematic configuration diagrams shown to explain the moving state of the lens, and FIGS. 5 and 6 show the configuration of the image forming apparatus. The fifth factor is an external perspective view, and FIG. 7 is a plan view showing the structure of the operation panel, FIG. 8 is a perspective view showing the structure of the drive section, FIG. 9 is a perspective view schematically showing the drive mechanism of the optical system, and FIG. The figure shows the structure of the variable power lens block, and is a perspective view showing only the main parts. FIG. 11 is a diagram showing the relationship between the operation of the variable power lens block and the image formed. Block diagram showing the overall control circuit, 1st
FIG. 3 is a configuration diagram of the main processor group, FIG. 14 is a configuration diagram of the first sub-processor group, FIG. 15 is a configuration diagram of the second sub-processor group, and FIG. 16 is a schematic configuration diagram showing the control circuit of the pulse motor. , FIG. 17 is a diagram for explaining the speed control method of the pulse motor. DESCRIPTION OF SYMBOLS 1...Main body, 2...Document stand, 21.22...Fixed scale, 2a, 2b...Transparent part, 8...Lens block for variable magnification, 10...Photoreceptor drum, 30... Operation panel, 30a, 30b... Set standard setting key,
51a, 52a, 51b... pointer, 71... main processor group. Applicant's agent Patent attorney Takehiko Suzue Figure 1 Figure 211! I Fig. 3 (a) Fig. 3 (b) Fig. 30 (C) Fig. 3 (d) Fig. 4 Fig. 5 H Fig. 8 Fig. 15 Fig. 16 Commissioner of the Patent Office Mr. Michibu Uga 1. Display of the case% Application No. 60-202674 2, Name of the invention Image forming device 3, Person making the amendment Relationship to the case Patent applicant (307) Toshiba Corporation 4, Agent 6, Subject of amendment 7, Amendment Contents (1) In the drawings attached to the application, the drawing number [Figure 30 t]
el J 'i Corrected passage 9 "Figure 3 (C)" which is not distributed in the attached sheet. 3υ Collar diagram (C)

Claims (2)

[Claims] (1) A scanning device that moves along a document table and optically scans the document placed on the document table, and an image carrier on which an image corresponding to the document image guided by the scanning device is formed. , an image forming apparatus comprising a transfer means for transferring an image formed on the image carrier to a supplied transfer material,
A set reference provided at each end of the document table; a changing means that is movable along the set reference and changes the imaging position of the image relative to the image carrier; Alternatively, a setting means is set on one side, an instruction means is provided along the setting standard of the document and instructs the image formation possible range of the document, and the setting standard is set on the side selected according to the setting of the setting means. An image forming apparatus comprising: a control means for displaying an image forming possible range by the instruction means and for operating the changing means. (2) Image formation according to claim 1, wherein the document setting reference has a light-transmitting part in part, and the indicating means is made visible through the light-transmitting part. Device.