JPS61196235A - Image forming device - Google Patents

Abstract

PURPOSE:To display the copying range of an original corresponding to a specified form and to indicate some part of the original with simple and inexpensive constitution by driving a scale moving means which displays the copying range of the original, and an indicating device moving means which indicates some part of an original platen part where the original is set by one drive source. CONSTITUTION:Pointers 51 and 52 as an (x) scale are moved by an (x) scale moving means 59 which serves as the drive source of the indicating device moving means 67. Namely, the pointers 51 and 52 are provided to a timing belt 57 which is extended between pulleys 54 and 55. The pulley 54 is put in motion through the speed reducing mechanism consisting of the rotating shaft of a pulse motor 135 as the drive source of the indicating device moving means 67 and a bevel gear mechanism, and the pulse motor 135 is driven according to form size and magnification to vary the mutual distance between the pointers 51 and 52.

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]

2. Description of the Related Art In recent years, electronic copying machines with a variable magnification function have been put into practical use in which a copyable range of a document for a specified sheet of paper is displayed on a document placement section on which a document is set.

On the other hand, the inventors of the present invention have recently been developing a copying machine that is capable of erasing an arbitrary range of a document when copying the document, and also allows the user to specify the region to be erased while viewing the document.

This copying machine has an indicating device mounted on a carriage equipped with an optical system that moves along a document placement section to scan a document image, and the indicating device is moved orthogonally to the scanning direction via a pointing device moving means. By moving in the direction, a certain portion of the document set on the document placement section is designated.

However, providing a dedicated drive source to move the pointing device has been an obstacle to simplifying the configuration and reducing costs.

[Purpose of the invention]

The present invention has been made based on the above circumstances, and its object is to scan the original image by moving a carrier equipped with an optical system along the original placing section. , while having a unit and inexpensive composition,
Displaying the copyable area of the original on the specified paper,
The present invention provides an image forming apparatus that can specify a certain part of a document.

[Summary of the invention]

In order to achieve the above-mentioned object, the present invention includes a scale that moves in a direction perpendicular to the scanning direction of the original and an indicating device mounted on the carriage, and moves the scale to move the original into a copyable range of the original on the original placing section. The scale moving means for displaying the scale and the pointing device moving means for moving the pointing device to point to a certain part of the document on the document placing section are configured to be driven by one driving source.

[Embodiments of the invention]

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

FIGS. 13 and 14 schematically show an image forming apparatus, such as a copying machine, according to the present invention. That is, 1
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 as a document placement section for supporting a document.

This document table 2 is provided with a fixed school 2□ which serves as a reference for setting the document, and furthermore, near the document table 2, there is a document cover 11 that can be opened and closed, and a work table 1. is provided. The original set on the original platen 2 is processed by an optical system consisting of an exposure lens f4 and mirrors 5, 6.7, which reciprocates along the lower surface of the original platen 2 in the direction of the arrow. K is set so that exposure scanning is performed during reciprocating. In this case, mirror 6.2 moves at half the speed of mirror 5 so as to keep the optical path length constant. The light reflected from the original by the scanning of the optical system and the light reflected from the original by the light irradiation of the light exposure land 4 are reflected by the mirrors 5, 6°7.
After being reflected by the lens block 8 for variable magnification, it is further reflected by the mirror 9 and then onto the photoreceptor drum 1.
0, so that the image of the original is formed on the surface of the photosensitive drum 10.

The photosensitive drum 10 rotates in the direction of arrow C, and the surface is first charged by the charging device 111F, and then the original is exposed to light to form a static latent layer. The electromagnetic latent image is visualized when toner is deposited by the developing device 12. On the other hand, sheets of paper (forming material to be imaged) P are taken out one by one by the selected upper paper feed cassette 13 or lower paper feed cassette 14 and the delivery rollers 15 or 16, and the paper guide path 1
7 or 18 to be guided to a pair of registration rollers 19, and sent to a transfer section by this pair of rollers 19.
It has become. Here, each of the paper feed cassettes 13 and 14 is removably provided at the lower right end of the main body 1, and one of them can be selected in an operation panel described later. In addition, each of the above paper feed cassettes) 23.7
4 is the cassette size detection switch, Chiro 0K, 6 respectively.
The skein size is detected by 0□.

These detection switches 501, 60. is composed of a plurality of microswitches that are turned on and off according to the insertion of cassettes of different sizes.

On the other hand, the paper P sent to the transfer section comes into close contact with the surface of the photoreceptor drum 100 at the transfer charger 20, so that
The toner particles on the photoreceptor drum 10 are transferred by the action of the charger 200. The transferred paper P is peeled off from the photoreceptor drum 10 by the action of the peeling charger 21 and conveyed on the conveyor belt 22, and sent to a pair of fixing rollers 23 as a fixing device provided at the terminal end of the conveyor belt 22. By passing through this, the transferred image is fixed. Then, the paper P after fixing is
The paper is ejected to a tray 25 outside the main body 1 by a pair of ejection rollers 2411C. After the transfer, the photosensitive drum 10 is neutralized by the charger 26I/C, residual toner on the surface is removed by the cleaner 27, and residual toner is removed by the neutralization rung 28, returning it to the initial state. It's starting to go back. Note that 29 is a cooling unit 77 for preventing the temperature inside the main body 1 from rising.

FIG. 15 shows the operation provided on the main body I, the p4 channel 30. 301 is a copy key for commanding the start of copying;
30. 30 is a numeric keypad for setting the number of copies, etc.
is a display section that displays the operating status of each part and paper jams, etc.
304 is a cassette selection key for selecting upper and lower paper feed cassettes 13 and 14; 30. is a cassette display section that displays the selected cassette; 30. is a magnification setting key for setting the enlargement/reduction magnification of copying in a predetermined relationship; 30. is a zoom key that allows stepless setting of enlargement and reduction magnification; 30. is a display section that displays the set magnification; 30*, 30b, 30c, and 306 are operation keys for moving a spot light source that indicates the erasing position of the original, which will be described later. 30. is a position designation for inputting the coordinate position indicated by the spot light source. Keys 301 and 30g are erasing range designation keys for specifying erasing ranges at designated positions, respectively.

FIG. 16 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, numeral 31 is a lens motor, which is a motor for moving the position of the lens pro 8 for changing the magnification. Reference numeral 32 denotes a mirror motor for changing the distance (optical path length) between the mirror 5 and the mirror 6°7 for zooming. 3
3 is a scanning motor, which operates the exposure run f4 and the mirror 5;
, a motor for moving the mirror 6.7 for scanning one document. 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 11FC during zooming. 35 is a developing motor, which is connected to the developing device 12.
This is a motor for driving the developing roller, etc. 36
A drum motor is a motor for driving the photosensitive drum 10 and the like. 37 is a fixing motor, which connects the paper transport path 22, the pair of fixing rollers 23, and the pair of paper ejection rollers 24.
This is a motor for driving.

Reference numeral 38 denotes a paper feed motor, which is a motor for driving the delivery row 215.16. 39 is a paper feed motor;
This is a motor for driving the registration roller pair 19. A fan motor 40 is a round motor that drives the cooling fan 29.

FIG. 17 shows a drive mechanism for reciprocating the optical system. That is, the mirror 5 and the exposure run f4 are in the first carry, at 41°, and the mirror 6.7 is in the second carry, at 41°. Each of these carriages 41K is supported by

41□ is the guide rail 42□, 42. It is guided by and can freely move in parallel in the direction of arrow a. That is, the 4-phase/#rus motor 33 drives the pulley 43. This pulley 43
An endless belt 45 is stretched between the idler pulley 44 and the idler pulley 44), and one end of a first gear 411 that supports the mirror 5 is fixed to a midway portion of the belt 45.

On the other hand, the rail 42 of the second carriage 41 supports the mirror 6.7. The guide portion t6 includes a rail 42. Two pulleys 1747[deg.]47 are rotatably provided at a distance in the axial direction of the pulleys 47, and a wire 48 is stretched between these pulleys 47,47.

One end of this wire 48 is fixed to a fixed part 49, and the other end is fixed to the fixed part 49 via a coil spring 50. Further, one end of the first carriage 41□ is fixed to the middle part of the wire 48. Therefore, as the pulse motor 33 rotates, the belt 45 rotates and the first carriage 41□ moves, and the second carriage 41. also move. At this time, Goo IJ
47, 47 serve as movable pulleys, the second carriage 41. move in the same direction at 1/2 the speed. In addition, 1. 2nd gear, -
)41□.

The moving direction of 41□ is controlled by switching the rotation direction of the pulse motor 33.

FIG. 18 shows the overall control circuit, in which the main processor group 71 and the first . 2nd sub-processor group 72.73
It is mainly composed of. The main processor group 21 includes an operation panel 30 and various switches and sensors, such as the cassette size detection switch 60. ．． 60. a high-voltage transformer 76 that detects inputs from input devices 75 such as, and drives each of the chargers; the static eliminator 28; the platen lenoid 27a of the cleaner 27; 4 and each of the motors 31 to 40 to perform the above-described copying operation, and control the spot light source 131, pulse motor 135, erase array 1501 array drive section 160, memory 140, etc. to remove unnecessary originals. Performs an operation to erase a part. Note that the spot light source 131, )4 pulse motor 135, erasing array 150, array driving section 160, and memory 140 will be described later.

Among the above motors 31 to 40, motor 35°37.40
and a toner motor 7 that supplies toner to the developing device 12.
7 is controlled by the main processor group 71 via a motor driver 78, and %-11JI~34 and 135 are
The motors 36, 39, and 38 are controlled by the first subprocessor group 72 via the pulse motor driver 79, and are controlled by the second subprocessor group 7 via the main pulse motor driver 80.
Controlled by 3. Further, the exposure rung 4 is controlled by the main processor group 71 via the rung regulator 81.
The heater 23g is controlled by the main processor group 71 via the heater control section 82. Then, from the main processor group 71, the first. Commands to drive and stop each motor are sent to the second sub-processor group 72 and 73, and the first... The second sub-processor group 72, 73 sends the status indicating the drive/stop state of each motor to the main processor group 71.

In addition, the first subprocessor group 72 includes motors 31 to 3.
Position information from a position sensor 83 that detects each initial position of 4 is input.

FIG. 19 shows an example of the configuration of main group 7. That is, numeral 91 is a one-chip microcomputer (hereinafter simply referred to as microcomputer), which performs graphic and display operations, human power detection of the buttock keys, and various display controls through an input/output port 92. Also, microcomputer 91
is expanded by input/output ports 93-96. The input/output port 93Fc is connected to a high voltage transformer 76, motor driver 78, rung regulator 81, and other outputs, and the input/output port 94 is connected to a size switch for detecting paper size and its low input. The output/-toystC is connected to a copying condition setting switch and its low input. In addition, the input/output port 96
is for options.

FIG. 20 shows an example of the configuration of the first sub-processor details 72. That is, a microcomputer 101 is connected to the main processor group 71. Reference numeral 102 is a programmable interval timer for controlling the phase switching interval time of the pulse motor. output to the interrupt line. A reference clock pulse is input to the timer 102. Further, the microcomputer 1011C receives position information from the position sensor 83 and is connected to input/output ports 103 and 104.

And the above input and output! Motors 31 to 34.135 are connected to the motor 1o4 via the mother motor r life puff 9. The input/output port 103 sends the status signal of each pulse motor to the main processor group 7.
It is used when outputting to 1.

FIG. 21 shows an example of the configuration of the second sub-processor group 73. That is, 111 is a microcomputer, which is connected to the main processor group 71. Reference numeral 112 is a programmable interval timer for the phase switching interval time control angle of the Nockles motor, and when a setting value is set from the microcomputer 111, it starts counting based on it, and stops when the count is out. Output the route. This end pulse is applied to the latch circuit 113, and its output is supplied to the interrupt line and input/output port input line of the microcomputer 111.

An input/output port 114 is connected to the microcomputer 11, and this input/output port 114 has the above-mentioned 1? Motors 3g and 38.39 are connected via a motor driver 80.

Figure 22 shows the control circuit of the pulse motor, and shows the input/output port 121 (input/output 1f in Figures 20 and 21!-
(equivalent to 104, 114) is a noggle motor dry
4122 (Fig. 18 OAk motor driver 79.8
0) is connected, and each winding A of the Noculus motor 5 (12211CApv motor 123 (equivalent to the above-mentioned Gurus motor 31 to 34° 36.38.39Vc) is connected.
, A, B.

Hundreds are connected.

Fig. 23 shows the speed control method of the pulse motor (f%O), the (&) figure shows the speed curve of the pulse motor, and the figure (b) shows the phase switching interval. As is clear from this figure, the phase switching intervals are long at first, gradually become shorter, then become equal intervals, gradually become longer again, and then stop. That is,
This indicates the slew up and slew down of the motherboard, starting from the self-starting region, starting up, being used in the high speed region, and eventually falling. In addition, 11m11...
-tx indicates the phase switching interval time.

Next, the main parts of this invention will be explained. In FIGS. 1 to 3, a guide shaft 130 is provided along the lamp 4 in the part where the light of the lamp 4 is blocked in the first carriage 41□. A light source 131 is movably provided as an indicating device for indicating the erasing range. As shown in FIG. 3, this spot light source 131 consists of a light-emitting element 132, such as a light-emitting diode or a lamp, and a lens 133, which are provided opposite to the document table 2. In this case, the document table 2 is irradiated with a spot light having a diameter d. This switch light has a brightness that allows it to pass through the document G set on the document table 2, for example, and has a thickness similar to that of a postcard. Further, the spot light source 131 as an indicating device is provided by an indicating device moving means 167.
Accordingly, the carriage 411 moves in a direction perpendicular to the direction of movement of the carriage 411 (the scanning direction of the yK document). That is, as shown in FIGS. 1 and 2, the spot light source 13
1 is connected to a timing belt (toothed belt) 134 disposed along the guide axis xsoVc. This timing belt 134 is passed between a pulley 136 and a driven pulley 137 provided with an i4 Luss motor 1350 rotating shaft 135hFC as a driving source. therefore,
By rotating the laser motor 135, the spot light source 131 is moved in a direction perpendicular to the scanning direction of the first carriage 41□. Also, the guide shaft 130 No.J? The first carriage 41 located at the side end 11C of the motor 135
□ is provided with a position sensor 138 consisting of a microswitch that detects the initial position of the spot light source 131. For example, when the spot light source 131 is moved, first,
The spot light source 131 comes into contact with the position sensor 138 to detect the initial position.

Furthermore, the copyable range corresponding to the specified paper is displayed on the document table 2. That is, the paper size specified by the paper selection key 304 is set to (px,
p, ) and press the magnification setting keys 306.30. If the copy magnification specified by is K, then the copyable range (x,
y) becomes x=PX/K y=Py/.

As shown in FIG. 4, this copyable range (X.

Of y), the X direction is indicated by the lines drawn on the back surface of the document table 2 and on the pointers 51 and 52 as an X scale movably disposed relative to the first carriage 411, Similarly, the direction is the line b drawn on the frame 53 as a y scale provided on the upper surface of the first cylinder and the fixed scale 2. It is designed to be displayed depending on the distance between the end face and the end face.

The pointers 51 and 52 serving as the X scale are moved by an X scale moving means 59 that shares a driving source with the pointing device moving means 67. That is, as shown in FIGS. 1 and 2, pointers 51 and 52 are provided on a timing belt 57 that is stretched between pulleys 54 and 55. The pulley 54 is a driving source for the pointing device moving means 67.
35a and a speed reduction mechanism 58 consisting of a bevel gear mechanism.
The distance between the hands 51 and 52 can be changed when the hands are driven in accordance with the paper size and magnification.

Further, the first carriage 411 is moved to a predetermined position (home position according to the magnification) by driving the motor 33 according to the paper size and magnification. Then, when the copy key 301 is pressed, the first
The carriage 41□ is first moved toward the second carriage 412, and then the lamp 4 is turned on and the second carriage 41□ is moved toward the second carriage 412.
Ji41. is moved in the direction away from.

When scanning of the original is completed, run f4 is turned off and the first
The carriage 411 is returned to the home position.

Next, using FIGS. 4 to 6, perform the above-mentioned spot.

A method of specifying the erasing range of a document using the light source 131 will be described. This spot light source 131 is moved by operating the aforementioned operation keys 3oa to SOa. Namely 1. When the operation keys sob and soa are pressed, the motor 33 is driven, and the first barrel 411 and spot light source 131 are moved in the scanning direction (arrow y direction shown in FIG. 4). Also, if you press the operation keys 30* and 30e,
The motor 135 is driven, and the spot light source 131 is moved in a direction K (direction of arrow X shown in FIG. 4) perpendicular to the scanning direction. The operator operates the operation keys 301 to SOa while visually observing the spot light transmitted through the document G, and presses the position designation key 30e after moving the spotlight to the point S□ on the document G shown in FIG. 5, for example. . Then, the coordinate position specified by this Sl is stored in the main processor group 71 shown in FIG. Similarly, when the position specifying key 30e is pressed with the spotlight moved to point S8 on the document G, the position of point S1 is stored in the main process.

The position of this spot light is, for example, 33.1
Detection can be made by counting the number of drives and pulses of 35. Thereafter, when the erasure range designation key 301 is pressed, a rectangular area (indicated by diagonal lines) having diagonal points S1, S, and S is designated as the erasure range, as shown in FIG. 5(a). In addition, as shown in Figure 5), the manuscript GC) S, point,
Specify 84 points and press the erase range designation key 30g.
,.

The area other than the square with 84 diagonal points is designated as the erasing range. In this way, the erasure range specification key 30f,
When 30g is pressed, the main processor group 71 performs calculations based on the positions of the two specified points, and the memory 14
0 stores a high-level signal 61'' for the erase range part, and a low-level signal 10n for the other parts.In other words, this memory 140 has a capacity in each column direction of The moving distance ÷ the position resolution in the IX direction is approximately equal to the displacement, and the capacity in each row direction is equal to the y
The main processor group 7 is composed of a RAM whose movement distance in the direction ÷ position resolution in the y direction is almost the same.
In the case of Figure 5 (, ), as shown in Figure 6 (a) K, according to the data supplied from 1, the figure 5 price)
In this case, as shown in FIG. 6(b), a high level signal is stored at the address corresponding to the shaded area, and a low level signal is stored at the other addresses.

On the other hand, as shown in FIG. 7, an erasing array 150 serving as erasing means is provided close to, for example, between the charger 11 and the exposure section P of the photosensitive drum 10. This erase array 1
50, as shown in FIGS. 8 and 9, a plurality of light-shielding cells 151 are arranged in a direction perpendicular to the rotational direction of the photoreceptor drum 10, and inside each of these cells 151, as shown in FIG. As shown in (b), a light emitting element 152 made of, for example, a light emitting diode is provided.

Furthermore, a lens 153 is provided in the opening of each cell 151 facing the photoreceptor drum 10 to focus the light from the light emitting element 152 onto the surface of the photoreceptor drum 100. The number of light emitting elements disposed in the erasing array xsoFc matches, for example, the capacity of the memory 140 in the column direction. Here, if the distance between the light emitting elements 152 is P and the number is N, the total length of the erasing array 150 is Q=NXP.

The erase array 150 is driven by the array driver 160 described above. As shown in FIG. 11, this array driving section 160 includes a shift register 161 having the same number of bits as the number of bits in the column direction of the memory 140, and a store register 16 in which the contents of this shift register 161 are held.
2. It is composed of a switch circuit 164 consisting of a plurality of switch elements 163 that are controlled on and off by each output signal of the store register 162, and the movable contact pieces 163a of these switch elements 163 are grounded. , the fixed contacts 163b are connected to each cathode of a light emitting element (light emitting diode) 152 constituting the erasing array 150, respectively. The anode of each of these light emitting elements 152 is connected to a power source η via a current limiting resistor R, respectively. It is connected to the.

After specifying the erase range of the original as described above, the original cover 1□ is closed, and the copy key 30! Press
The first carriage 41□ and the photosensitive drum 10 are operated, and the memo IJ 140 is moved in the row direction (the sixth
Data for K1 columns (shown in the figure) are sequentially read out. This read data D4 is transferred to the shift register 161Jlc of the play IK moving section 160 in accordance with the clock signal CLK. After data for one column of the shift register 16111C has been transferred, when the charged portion of the photoreceptor drum 10 reaches the erase array 150, a latch signal LTH is output from the main processor group 71, and the shift is performed in accordance with this signal. The contents of register 161 are provided to store register 162.

That is, since the erasing array 150 is arranged between the charger 11 and the exposure section P, one column of data output from the memory 140 is, for example, based on the angle between the erasing array 150 and the exposure section P. The output timing of the latch signal LTH is controlled so that it is supplied to the store register 162 before K, θ1/ω, and the photosensitive drum 10 is rotating at an angular velocity ω.

Each switch element 163 of the switch circuit 164 is controlled by each output signal of this store register 162. When the output signal of the store register 162 is high level, it is turned on, and when it is low level, it is turned off. As a result, the light emitting element 152 connected to each switch element 163 is turned on. It will be lit when it is on, and it will be off when it is off. Therefore, among the charged portions of the photoreceptor drum 10, the portion where the light emitting element 152 is turned on is neutralized, and even if this neutralized portion is subsequently exposed to light, static electricity is not formed and the original image is erased. That means that. Thereafter, the data in the memory 140 is sequentially output one column at a time in the same manner, and the image is erased.

Note that this invention is not limited to the above embodiments.

For example, the arrangement position of the erasing array 150 is not limited to between the charger 11 and the exposure section P shown in FIG. It is also possible to configure the electrostatic potential that has been formed to be erased according to specifications.

Furthermore, the capacity of the memory 140 can also be changed as required.

In addition, although the description has been given of a device that uses a switch light source as an instruction device to instruct the erasure range position of a document in a switch-like manner, the present invention is not limited to this. The end face position may be indicated to detect the size of the document set in the document.

Alternatively, the line b on the frame 53 as the y scale may be omitted, and the lines b/ and b/ provided on the pointers 51 and 52 as the x scale may be used to indicate.

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

〔Effect of the invention〕

As explained above, in the present invention, a scale that moves in a direction perpendicular to the scanning direction of an original and an indicating device are mounted on a carrier, and the scale is moved to place the original on the original placing section. A scale moving means for displaying a range that can be called, and an indicating device moving means for indicating a certain part of the document on the document placing section by moving the indicating device, configured to be driven by a single drive source. It is. Therefore, a method that scans the original image by moving a carriage on which an optical system is mounted along the original document tray has a simple and inexpensive structure, and can scan the original image on the specified paper. It is possible to provide an image forming apparatus that can display a copyable range and specify a certain part of a document.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a perspective view showing the configuration of the main parts, FIG. 2 is an exploded perspective view, and FIG. 3 is a side view showing a part of FIG. 1. 4 is a plan view of the apparatus with some parts omitted; FIG. 5 is a plan view showing a state in which the erasure range of a document is specified; and FIG. 6 is an explanatory diagram schematically showing a state in which the erasure range is stored. , FIG. 7 is a configuration explanatory diagram showing the arrangement of the erasing means, FIG. 8 is a schematic perspective view showing the arrangement of the erasing means, FIG. 9 is a front view, and FIG. 10 is a diagram showing the arrangement of the light emitting elements. An explanatory diagram, FIG. 11 is a configuration diagram of the play drive unit, FIG. 12 is a configuration explanatory diagram showing different arrangement positions of the erase play, and FIGS. 13 and 14 are diagrams showing the configuration of the image forming apparatus. Fig. 13 is an overview perspective view, Fig. 14 is a side sectional view, Fig. 15 is a plan view showing the configuration of the operation/J channel, and Fig. 14 is a side sectional view.
6 is a perspective view showing the configuration of the drive section, FIG. 17 is a perspective view schematically showing the drive mechanism of the optical system, FIG. 18 is a configuration diagram showing the overall control circuit, FIG. 19 is the main processor, FIG. 20 is a configuration diagram of the first sub-processor group, FIG. 21 is a configuration diagram of the second sub-processor group, and FIG. 22 is a schematic configuration diagram showing the control circuit of the four-wheel motor. FIG. 23 is a diagram for explaining a method of controlling the speed of the nollus motor. 1...Copy machine main body, 2...Document placement section, 2□...
Fixed scale, 4 squares... Carriage, 51.52.
...X scale, 53...y scale, 59...scale moving means, 67... indicating device moving means, 131
...Instruction device. Applicant's Representative Patent Attorney Takehiko Suzue Figure 2 Figure 3 Figure 4 Figure 5 (a) Figure 5 Figure 6 (a) (b) Figure 7 Figure 12 Figure 9 (a) ( b) Fig. 11 15° 13 m Fig. 16 Fig. 20, Fig. 21

Claims (4)

[Claims] (1) In an image forming apparatus that scans the original image by moving a carriage equipped with an optical system along a document placement section, the image forming apparatus is provided such that the carriage is movable in a direction orthogonal to the scanning direction of the original. scale and
a scale moving means for moving the scale to display a copyable range of the original on the original document placement section; an indicating device mounted on the carriage so as to be movable in a direction orthogonal to the scanning direction of the original; a pointing device moving means for pointing a certain part of the document on the document placing section by moving the device, and the scale moving means and the pointing device moving means are driven by one drive source. An image forming apparatus characterized by comprising: (2) The image forming apparatus according to claim 1, wherein the carriage is provided with a scale that displays a copyable range in a direction along the scanning direction of the original. (3) The image forming apparatus according to claim 1, wherein the indicating device specifies the erasure range position of the document in a spot manner. (4) The image forming apparatus according to claim 1, wherein the indicating device indicates the position of an edge of the document in order to detect the size of the document.