JPS6039658A - Image forming device - Google Patents

Abstract

PURPOSE:To permit easy setting of an original by displaying a copying area to an original platen. CONSTITUTION:When the operator instructs the region desired to copy on an original platen 81 by an operating button, a scanning carriage 82 stops after moving for a prescribed distance from a start position 83 and the length (x) of the region is displayed. The prescribed part of a liquid crystal reflecting array 86 on the carriage 82 changes reflectivity and displays the width (y) of the region. The operator places the part desired to copy of the original in superposition on the displayed region. When the carriage 82 scans and exposes the original, the array 86 reflects the light outside the region and therefore no black frame is formed on the copy. The copying magnification is calculated from the size of the selected region and the size of the set cassette for copying paper and is automatically set.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an image forming apparatus such as a copying machine,
The present invention relates to an image forming apparatus suitable for guiding the position of a document.

[Technical background of the invention and its problems]

For example, as a means for guiding a document in a flea such as a copying machine, devices such as those shown in FIGS. 1 and 2 have conventionally been used. That is, a transparent glass plate (2) is placed on the base (fl) of the copying machine main body, and this glass plate (2)
) is fixed to the base (1) with a front glass fixture (3) and a rear glass fixture (4). The size of the original as shown (for example, A3.
A4. A5) Original positions (5a), (5b), and (5c) for placing the originals were marked. Note that (6) is an operation unit for an operator to operate the copying machine. However, while this method makes it easy to mark the position of the original, it is possible to set the original either vertically or horizontally depending on the original size, and the original cannot be set in a copying machine with functions such as enlarging and reducing. This method has a disadvantage in that it is difficult to know which area of the screen can be copied, which often leads to copy errors.

[Purpose of the invention]

The present invention has been made based on the above circumstances, and an object of the present invention is to provide an image forming apparatus that can reliably guide a document with a relatively simple configuration and can display a copy area.

[Summary of the invention]

The present invention provides, for example, an image forming apparatus such as a copying machine,
The document is characterized in that the position of the document and the copy area are clearly indicated, and copies can be made at an appropriate magnification depending on the document and paper size.

[Embodiments of the invention]

The present invention will be explained below based on an embodiment shown in FIGS. 3 to 6. FIG. 3 shows the general configuration of a copying machine suitable for employing this apparatus. In the figure, (11) is the main body of the copying machine, and a removable tray αυ, a lower cassette U and an upper cassette I- (13) containing paper (P) are attached to the lower part of the main body (10). In addition, an original platen I on which an original (not shown) is placed is fixed on the upper part of the main body. lamp (19 and the first mirror (scanned by 10, second mirror 0?),
When the third mirror (18) moves while keeping the optical path length constant, it moves back and forth in synchronization with the rotation of the drum C2υ, which is a photoreceptor. In other words, the original placed on the original table (ta) is exposed to the irradiation lamp tJ'3.
) is irradiated from the first mirror a, the second mirror (17), and the third mirror (from 1 second onwards, an image is formed on the surface of the drum shell via the lens a9 and the fourth mirror (2). There is a charger (2) near the drum (21).
A drum is arranged to charge the surface of the drum I21). A portion of this charge is erased by the imaged illumination to form a latent image, which is developed by a developing device (c).

On the other hand, when the paper (P) stored in the lower cassette θ is taken out one by one by the drive of the lower feed roller Qa and further sent to a pair of registration rollers (C), the paper (P) is is held by the registration rollers (c) and guided to the lower part of the drum shaft υ. Therefore, the developed toner is transferred onto the paper (P) by a transfer charger (21).

The paper (P) transferred in this way is transferred to the conveyor belt (2
The image is sent to the fixing device (to) via η, where it is fixed.

The paper (P) that has completed the fixing is discharged to the tray (11), while the drum Cυ that has completed the transfer is moved to the cleaner 0 (
It is cleaned by the charger (g) and then returned to the charger (g).

Also, if the upper cassette αJ is selected, 1. In this case, the paper (P) stored in the upper cassette (1 piece) is taken out one by one from the upper feed roller 61st point and the paper (P) stored in the upper cassette is taken out one by one.
As in case 1, when copying is completed after passing through the registration rollers (2 units), drum (21), conveyor belt (21), and fuser (2 units), the copied paper (P)
is designed to eject 110 trays.

Next, in FIG. 4(a), lbl is a document guide display device showing the main part of the present invention, lal is a plan view, and fbl is A
It is a cross-sectional view taken along -A'ffdl. In the figure,
Sir is the front glass fixing, this glass fixing (41
There are four liquid crystal display panels (hereinafter abbreviated as LCD) at the bottom of the central part of the polarizing plate, and four protective films at the top.
41 is closely attached to constitute a document guide display device +40),
The above L CD (connect connector (451 to 43),
An LCD display control signal is sent. In addition, (40 is based on the above front glass fixture (411)
This is a hole for attaching to 1).

Next, FIG. 5 is a block diagram showing the electric circuit of the document guide display device. In the figure, a data signal person is a paper size detection means for detecting the size of copy paper, that is, a paper size data signal from a paper size detection device (not shown) and a selection means for arbitrarily selecting a copy area by an operator;
In other words, the LC from the operation unit (6) operated by the operator
This data signal A indicates a display control signal, and this data signal A is input to the arithmetic circuit 6v to calculate the copying magnification for the paper size, and displays the selection of the magnification on a display section (not shown).

Therefore, when a desired magnification is selected from the display contents of the display section, the arithmetic circuits υ drive the driver circuit 64, and based on the data signal B, the plurality of segment electrodes (42a)
. . . and a common electrode (42b), the copying magnification determining means, that is, the LCD (4'';!H) is configured to display the selected magnification by lighting. The data signal B is a plurality of segment electrodes (42
a) It is a data signal to...

Next, FIG. 6 shows a display 5fJ of the document guide display device. In the figure, (Ll) is the document position displayed by LcN2f or the center line of the copy area, (Lx)
, (Ls) are upper and lower limit lines indicating the document position or copy area. In other words, at the same magnification, the width of the paper is set to the upper limit line (L,) and the lower limit line (L,).
L3) is doing what is displayed. This is the original setting position as well as the copying area.

Therefore, when enlarging or reducing a copy using the document guide display device (40), an operation button (not shown) provided on the operation section (6) shown in FIG.
By manipulating , the widths of the upper limit line (L, ) and lower limit line (L, ) are arbitrarily controlled to determine the copy area. This copy area is set as the document size, and by comparing it with the paper to be copied, the enlargement rate or reduction rate can be successively changed.

In the above embodiment, the center line (L, ) is used as the reference, but the same effect can be obtained even if the reference is set on the corner. Furthermore, the display method is not limited to this.

In addition, in this embodiment, a glass fixture with a built-in liquid crystal display board was fixed to the base, but FIGS.
As shown in Figure 7 (cl), by swinging part A using the shafts (47a) and (47b) protruding from both ends of the Glass Fixture as fulcrums (see @Figure 7 (bl)), as shown in Figure 7 (cl) Since the B portion of the glass filth 14Il can be swung in the direction shown by the arrow, it can also be used in, for example, a copying machine with an automatic document feeder.

Next, another embodiment of the present invention will be described based on FIGS. 8 and 9. FIG. 8 shows a display example of the document guide display device [01] using a liquid crystal display board. In the figure,
61) is a document table on which a document is placed, the X area (61x) showing a part of this document table 6υ is a transparent member, and the remaining Y area (61x) is a transparent member.
1y) is configured to reflect, for example, light from an exposure lamp. Here, the X area (61X) indicates the size of the copy paper at the same magnification. That is, X
The area (61X) is the original setting position and is also the copy area. In addition, So is the front glass fixture for fixing the front part of the original platen (631 is the rear glass fixing for fixing the rear part of the original platen 6υ), and the front glass fixer (67J is for the X area) Center display section (61X) for displaying the center of the document set in
financial institutions) are established.

That is, when enlarging or reducing, the operator controls the X area (61x) using the operation unit to change the copy area, compares this changed copy area with the paper selected as the original size, and This allows the enlargement or reduction ratio to be changed.

Next, the operation of the present invention based on the above configuration ζ will be explained with reference to FIG. Currently, the manuscript (A) is B4
Upper cassette 0: A4-R size paper (P8) is set vertically in the pocket, and A3 size paper (P,) is set vertically in the lower cassette 0.7J4. It is assumed that the X area (61x) that displays the position of is displaying A5 size.

Therefore, the operator first moves the B4 size document C to the document guide display device side to the position Xm shown by the dotted line using an operation section (not shown). At this time, the X region (61
x) is displayed enlarged to B4 size.

Next, select the upper cassette (13 or lower cassette I-0'2), but if you select the upper cassette α floor, you can copy the entire surface of paper A4-It (P,) or the entire surface of B4 size original. The copying is performed by automatically selecting a suitable reduction ratio and starting copying.

In addition, the document guide display device ■ω is located at the lower cassette at the X-ray position)
(If 13 is selected, an enlargement ratio that allows copying of the entire surface of a B4-sized original on paper A3 (P,) is automatically selected.

Furthermore, when the document guide display device (601) is aligned with an arbitrary Y line (not shown) using the operation unit 6, the Y line will be displayed as the document size. You can automatically select the enlargement or reduction ratio that allows full-scale copying of A3 (P,) or A4-11 (PI).

Next, a modification of the present invention will be explained based on FIGS. 10 to 12. In FIG. 10 ζ, (70 is a document guide display device in which, for example, a U-shaped light emitting body σB is arranged on the outer periphery f of a document table (2) made of a transparent member.

The lighting position of the light emitting body συ is controlled by an electric circuit shown in FIG. That is, in FIG. 11, data signal A indicates a paper size data signal from a paper size detection device (not shown) and a light emitter control signal from an operating section (6) operated by an operator.
This data signal A is input to the arithmetic circuit σ to calculate the copy magnification for the paper size, and display the selection of the magnification on a display section (not shown).

Therefore, when a desired magnification is selected from the display contents of the display section, the arithmetic circuit a2 inputs the driver circuit (which drives the light emitting element σ1 based on the data signal B) to create a copy area of the selected magnification. It is configured to display a lighted display. In the figure, the data signal B is a plurality of light emitters συ
is the data signal to.

Next, FIG. 12 shows a display example of a document guide display device in which a U-shaped light emitting body is attached to a document table. In the figure, the shaded area (5
) and (B) are the portions that emit light, and FIG. 14 shows the size of the paper at the same magnification. Zunawaji,
The shaded area (B) is the position where the original is set and is also the copy area.

At the same time, when enlarging or reducing a copy, the operator controls the light-emitting diagonal area using the operating section (6). Then, since a certain relational expression is set in advance between the shaded area (4) and [Bl, the shaded area (Bl changes according to the change in the shaded area).This shaded area (5) and (B) The copy area made up of # is set as the size of the document, and the enlargement or reduction ratio can be successively changed while checking against the selected paper (not shown).

Although the light emitters are arranged in a U-shape in this embodiment, they are not necessarily limited to this, and even if they are arranged in an L-shape, the same effect as described above can be obtained. . Further, although the above-mentioned light emitting body is made to emit light continuously, it is also possible to make it emit light only at the edge of the copy area. Further, a reflector may be used instead of the light emitter, and the same effect as described above can be obtained.

Furthermore, a modification of the present invention will be explained based on FIGS. 13 to 15. In Fig. 13, reference character υ is a transparent member, such as a glass plate, on which the original is placed, and a carriage g3 of the optical system for scanning the original is placed close to the lower part of this original support (R1). has been done. Note that the mechanism for forming an image on the photoreceptor, transferring it to paper, and ejecting it to a tray is the same as that shown in FIG. 3, so a description thereof will be omitted.

FIG. 14 is a plan view showing the positional relationship between the document table and the carriage. In the figure, ψ: Now 'to' above, m4 units (
81) Front glass fixture fixing the front of QI4
1 is the rear glass fixture that also fixes the rear part.

Talented. The above-mentioned carriage (8D + moss 1) A light source for direct illumination, such as an exposure lamp (1) and a light emitter and reflector (8G) are integrally attached, and the stop position of the carriage (82) and the front glass fixture distance IQfG fxl
t indicates the horizontal direction of the copy area. Also,
The length fyl displayed by the light emitter or reflector (c) attached to the carriage glue indicates the vertical direction of the copy area, and the copy area is made clear by the distance (Xl) and the length fyl, etc. In this case, the document guide display device axis is constructed by the distance TXI and the length yl, which is the size of the paper detected by a paper size detection device (not shown).

With this configuration, distance tx) and length [
The range surrounded by yl is the copy area as well as the original setting position. Therefore, when enlarging or reducing a copy using the document guide/display shaft, the operator must press an operation button (not shown in FIG. 1) provided on the operation section (6).
(not shown), the length Tyl is controlled. Then, the distance [, 1 changes according to the change in the length Tyl due to the constant relationship ζ set between the distance [, 1 and the length Tyl. That is, as shown in FIG. 15, the detection signal of the paper size detection device Oυ and the output signal of the copy area display device 6 which displays the copy area (xXy) are output from the arithmetic circuit +9.
When inputted to 31, the arithmetic circuit 3) performs arithmetic operations to change the enlargement or reduction ratio.

In this modification, the entire area of the length yl is emitted by a light emitter or reflected by a reflector, but the method of displaying the length yl is not necessarily limited to this. Further, although the copy area is displayed by following the distance (xl) by the length Tyl, the same effect can be obtained even in the opposite case.

〔Effect of the invention〕

As described above, according to the present invention, when setting a document on the document table, the operator can reliably zero the line without any confusion and can enlarge or reduce a limited portion of the document as necessary.

Second, since the area outside the copy area reflects the irradiated light, it has excellent effects such as 1. For example, when copying a three-dimensional object such as a book, the surrounding area of the copy does not become black, resulting in a clear copy. It is.

[Brief explanation of drawings]

Fig. 1 is a schematic plan view showing the upper part of the copying machine main body, Fig. 2 is a plan view showing a conventional document guide display device, and Fig. 3 shows the general structure of a copying machine suitable for adopting the present invention. Front view shown%
FIG. 4(a) is a plan view of a document guide display device showing an embodiment of the present invention, FIG. 4 (bl is a sectional view taken along line A-i of FIG. A block diagram showing an electric circuit of the device, FIG. 6 is a plan view of a document guide display device showing another embodiment, and FIG. 7 is a plan view, front view, and side view showing a modification of the device , FIG. 8 is a plan view of a document guide display device showing a modified example of the present invention, FIG. 9 is an explanatory diagram of the case where the same device is used to copy an original at the same size and magnification change, and FIG. 10 is a plan view of a document guide display device showing a modification of the present invention. FIG. 11 is a block diagram showing an electric circuit of the device, and FIG. 12 is a plan view showing a display example of the device. Figure 14 is a front view showing the general structure of a copying machine suitable for adopting an applied example of the present invention.
The figure is a plan view of a document guide display device showing an application example of the present invention.
FIG. 15 is a block diagram for explaining the change in magnification based on the combination of original size and copy paper size. 40, 60, 70, 80... Document guide display device 41... Front glass fixture 42... Liquid crystal display plate 43... Polarizing plate 44... Protective film no. 45...
Connector 6... Operating unit 51... Arithmetic circuit 52... Driver circuit 47a
, 47b...Shaft 61...Original table 61x...
X area 61y...Y area 62...Front glass fixture 64...Center display section 71...U-shaped light emitter 72...Arithmetic circuit 73...
-Driver circuit 81...Original table 82...Carriage 83...Front glass fixture 85...Exposure tube 86...Light emitter or reflector 91...Paper size detection device 92... Copy area display device 93... Arithmetic circuit agent Patent attorney Inoue - Male Figure 5 Figure 6 La Lt Lx Figure 7 c'? ) Figure 7 (1) 7a Procedural amendment (spontaneous) Kazuo Wakasugi, Commissioner of the Japan Patent Office (Monday/Monday, Showa) 1, Indication of case: 1982 Patent Application No. 146579 2, Name of invention Image forming device 3, Relationship with the case of the person making the amendment Patent applicant (307) Tokyo Shibaura Electric Co., Ltd. 4, Agent Address: No. 4-41-11 Kamata, Ota-ku, Tokyo 144 Tsunoda Building Benjo Patent Office Telephone: 736-3558 ( 3257) Patent Attorney Inoue - Male 5, "Detailed Description of the Invention" section and above of the specification to be amended

Claims (6)

[Claims] (1) In an image forming apparatus, a scanning device supports a document and scans the document, a selection device allows the operator to arbitrarily select a copy area, and a display device displays the copy area determined by the selection device. a paper size detection means for detecting the size of copy paper; and a copy magnification determining means for determining a copy magnification based on a combination of the copy area displayed by the display means and the paper size detected by the paper size detection means. An image forming apparatus comprising: (2) The image forming apparatus according to claim 1, wherein the display means has a reflective liquid crystal display. (3) The image forming apparatus according to claim 1, wherein the scanning means has a transmissive liquid crystal display plate, and the copy area is displayed on the liquid crystal display plate by a display means. (4) The scanning means is composed of a transparent document placing table and a supporting member that supports the document placing table, and the displaying means has a light emitter or a reflector arranged in parallel on the side of the supporting portion. An image forming apparatus according to claim 1. (5) The scanning means has a fixed original table and an exposure carriage that moves relative to the original table, and the display means is provided on the exposure carriage. The image forming apparatus according to item 1. (6) The limit of the copy area along the scanning direction ζ is indicated by the exposure carriage moving and stopping directly at a specific position before the start of scanning, and the limit of the copy area along the scanning direction ζ is indicated, and the display means provided on the exposure carriage indicates the limit of the copy area, which intersects with the scanning direction. An image forming apparatus according to claim 5, characterized in that a limit of a copy area in a direction is displayed.