JPS6041029A - Platen device - Google Patents

Abstract

PURPOSE:To prevent miscopying due to an original protruded to an area to which copying is incapable by driving a liquid-crystal display part according to the decisions on form size and copy magnification, and displaying a copying area immediately. CONSTITUTION:An operator when starting copying operation operates a form size detector and a magnification selector according to copy conditions. For example, the operator performs operations for a unmagnification copy of A4 form size, A4 size width is displayed as the width of the copying area on a reflection type liquid-crystal display plate 17 with indications 26 and 27 through a controller as shown by solid lines, and the center position of the original is indicated with an indication 28. Consequently, the operator places the original on a glass plate 15a within the range of the displayed copying area and only the operation of a start button with an original cover closed is only required.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides a device having a magnification conversion function, which is capable of displaying an original placed on an original platen at the position It (t(i)). Regarding equipment.

[Technical background of the invention and its points of reference] In a photocopying machine, etc., the original is placed on the platen.
The one shown in the youngest figure 1 is used as a guideline for placement in the W area.

That is, this device uses a glass plate (ioa
) and this glass plate (10a) as the main body 0 and 2 -
1 of the glass fixtures (10b), (IOC).
Print the standard document size as a scale (1 odor) on Mil B11 glass fixture (10b), and print it on the glass plate (10b).
0a), which indicates the approximate placement position of the manuscript (not shown).

However, in this device, from page 5, where the paper size and the copyable area are matched during full-size copying,
Original placement position■i! ：Although it is possible to clearly indicate +1, the original placement position when enlarging or reducing copying is performed using a device that has a magnification conversion mode i1, which has been frequently used in recent years.
There is nothing that can be covered until then. In other words, in a device having a magnification conversion function, the copyable area of the glass plate (10a) is changed depending on the copying magnification and the paper size used, and the paper size and copy area are Because the numbers do not match, the operator cannot immediately record the copyable one-song area, and may make a mistake, or place the manuscript in the vertical or horizontal direction of 11.7 1M and place it in the non-copyable area. However, this method has the drawback of causing copy errors such as cropped images.

[Purpose of multi-Ig1 man] This invention was made based on the above type +71,
4 products that provide a document table device that can clearly display the copyable area on the document table according to the copy magnification and paper size, allow the operator to place the document reliably, and prevent copy mistakes. With the goal.

[Summary of the Invention] The present invention includes a liquid crystal display board mounted on a manuscript table, and aB f
ll, and the width of the copyable area on the document table varies.
=+Furthermore, by displaying both sides, the meberator is made to recognize the copyable area 7, thereby preventing erroneous copying and improving the reliability of the apparatus.

[Embodiments of the Invention] A first embodiment of the invention will be described below with reference to FIGS. 2 to 5. A transparent glass plate (15a) and this glass plate (15
A base plateau (I5) consisting of a glass fixture (15b) which is 11 for fixing a) is installed h'. This glass fixture (15b) has a frame portion <16) and a reflective liquid crystal display i + which is a liquid crystal display portion.
17), it is frY &. This reflective liquid crystal display board 0~ is a reflective liquid crystal display panel (1quid crystal
al (hereinafter referred to as LCD) (17a) 'Ll:A
The light plate (17b) and the protective film (1,7C) each have a weight of Jl and yt. -Blade body (1→
Upper control panel (14a) Non-paper size detection device (4), which is a key for deaf people to select the paper size, and keys to select the copying magnification of [Reduce], [Normal size], and [Enlarge] A magnification selection device (Company) is provided, which is fixed-mounted -Da)! Is the output from K++ a control device?
:(2) Connected to the arithmetic circuit (which is part of 1).

The output from this performance instrument circuit (the output from the driver circuit) is inputted to the LCD (17a).
)'s duty, residence segment 't4 & (24a)...
(24) is selected, and the LCD at the corresponding position
(17a) is driven and display 1 mj+, display 21271 as a copyable area on the reflective liquid crystal display &+37)
will be displayed, and the center will be displayed in black, displaying 3 tJ3+.

j+J (17d) td connector, example is LCD (1
7a) common 'f4. 'l: 4J<, (26a),
(27a), (26b), and (27b) show how display 1 ml and display 2 (Zη) are varied depending on the copying conditions.

At the start of copying, the operator Fi operates the paper size detection device 08) and the magnification selection device (a) according to the copying conditions. For example, if the paper size is [A. If so, when the operator performs an operation to that effect, a reflective liquid crystal display panel (indicated by the solid line in Table 21 in Figure 2) and a display 2 (
a) t), (A・4) The width of the copy IJJ function area is displayed in the size width, and the width of the copy IJJ function area is displayed in the display 3 (to)).
, 'j' are displayed. This allows the operator to place a thick layer (not shown) on the glass plate (15a) within the range of the displayed copyable area Vij.
r-1-L, after this, put on the thick phase cover (not shown), operate the start button (not shown), expose and then M
'il) will start the copying process. Next, the nuclear force condition is, for example, if the paper size is [A.4] size, (3
+i, person] If it is a copy, the reflection Ha1! via the control device (21)! On the liquid crystal display t (water plate 07), display 1 (26a) and &hi display 2 (27a) shown by dotted lines in Figure 2 indicate,
[A.5] Sizell'fA (: J copy"]' fi
t: Since the width of the area is displayed, the operator must place the original within this area. Furthermore, if the copying conditions are [reduced] copying with paper size [A.4], a second
Indication 1 (26b) and Indication 2 (27
As a result of b), the copyable area is displayed in the (A.3) size width.

With this configuration, the copyable area is immediately displayed before copying starts according to the copying conditions, so the operator does not have to independently know in advance whether the print size is appropriate or the document placement position. , you only need to place the original in line with the displayed copyable area, which eliminates the hassle before starting copying. This also prevents the image from extending out or being cut off, resulting in miscopying.

Next, a second embodiment of the present invention will be described with reference to FIGS. 6 and 7. The same parts as those in the first embodiment are given the same reference numerals, and the explanation thereof will be omitted. The main body (14) has a transparent plate +80) and a fixing part (31a) on the top surface.

There is a Harayudai Kei consisting of (31b). A scale of R1m size is printed on the front fixing plate (31a). On the other hand, while the entire surface of the transparent plate (2) is currently in a transparent state, the paper size detection device (18) and the magnification selection device are operated, and the control device ft18 (31) selects an arbitrary segment electrode (Fig. It is formed from an example of a liquid crystal display panel having a reflective LCD (not shown) that is driven so that the corresponding position becomes white and opaque when ζ2 (not shown) is selected. (aOa) is a transparent part, (30b) Fi is an opaque gIS.

However, at 1 o'clock when copying starts, the paper size detection device (1B) and the magnification selection device E'
f, operate Iali, but if the paper size is [A
・If it is a [enlarged] copy at 3] size, the control device 18
A transparent plate consisting of a liquid crystal display panel (consisting of 31) is formed with a white small 55~bright area (30b) on it. The section (30a) will display the entire area of the "+'J9-1i possible area."

As a result, the operator places the original on the transparent section (30a) and starts the copying process.

With this configuration, the entire side II functional area (30a) is immediately illuminated by 4'lJ according to the copying conditions, and the operator only has to place the original on this copyable area (aOa), unlike the conventional method. The problem is that the manuscript is not printed in areas that cannot be copied, resulting in copy errors.

In addition, areas other than the areas that can be photographed on the transparent plate (180) are rendered opaque white to prevent exposure leakage, making it unnecessary to have a document cover, and allowing thick documents such as books to be covered. It is also easy to copy the stopper.

However, the present invention is not limited to the above-mentioned embodiments, and can be designed in various ways, such as the structure of the manuscript table, the mounting position of the liquid crystal display, etc., for example, the first modified example shown in FIG. As in, - of the glass fixture (15b) of the first embodiment.
The mill is made swingable and the glass fixture (1
5b), in the state shown by the solid line, the leading edge of the document is stopped, and in the state shown by the dotted line, it is released. It may also be possible to use a Hirakata machine etc. with a device. In addition, in the embodiment of w, 1, the position of the liquid crystal display part U is not limited to the area around the bright plate, but may be provided on one side of the front or rear side of the 'J72i bright plate to limit the length of the copyable area. It may be displayed, or in the second embodiment, a structure may be adopted in which a liquid crystal display panel is further layered on the transparent plate. In addition, the liquid crystal 51 (the type and type of the holding part is not limited and is shown in Figure 9).
For example, as in the modified example of the first embodiment, a transmissive LCD is used as the liquid crystal display section of the first embodiment, and when the segment is selected, the light from the lamp is transmitted through the color filter. Depending on the situation, it is also possible to use a transmission type liquid crystal display board, which displays a polarizing plate (@) and a film (size).Also, the method of one-way movement of the liquid crystal display section by the control device is also optional. Yes, as shown in Figure 1θ, as shown in the third 1st form 1;
In the second embodiment, a transparent liquid crystal display panel (paulownia segment electric body is selected in a line shape, Display 4) and Display 5 are used.
For example, the width of the copyable area may be displayed using the display command 6), and the length of the copyable area may be displayed using the display command 6). still,
The copy magnification, paper size, etc. are not limited either.

[Effects of the Invention] According to the invention described above, the liquid crystal display unit, which is driven according to the determination of the paper size and the copying magnification, immediately displays the close-up area prior to the start of copying. Even when there is a problem with enlarged copying, the operator only has to place the original according to the display on the liquid crystal display, and unlike conventional methods, the original may extend beyond the copyable area due to guesswork, resulting in copy mistakes. There is no such problem, and the reliability of the device is improved. Moreover, since the display section is formed of liquid crystal, the device becomes less compact and lightweight.

[Brief explanation of drawings]

) Figure 51 is a partly omitted top view showing a conventional device, Figure 212
Figures 1 to 55 show the first embodiment of the cat invention.g
Figure 52 is a partly omitted top view, Figure 3 is a sterilization diagram showing the glass fixture, Figure 4 is its block diagram, Figure 5 is a block diagram showing part of its circuit, and Figure 6. 7 shows a second embodiment of this invention, FIG. 6 1 is a top view of the same, and FIG. FIG. 9 is a sectional view showing a second modification of the present invention, and FIG. 10 is a top view showing a third modification of the invention. 14...Main body J5...Original table], 5a...Glass plate 15b...Glass fixture 16...Frame portion 17...Reflective liquid crystal display plate 17a.
...Liquid crystal diode 17b...Polarizing plate 17c...
Retention film 18...Paper size detection device 1'r2
0... Magnification selection device 21... Control device 22...
Arithmetic circuit 23...Driver I+! 1st road 24th...
Segment electrode 26...Display 127...Display 22
8... Display 3 30... Transparent plate 30a... Transparent part 30b... Opaque part 31... 1hi foot part 32... Original table 3
4...Liquid crystal light board 40...Transmissive liquid crystal display board agent Patent attorney Inoue-Yu J Figure 1//7 [Figure 4 Figure 5 Figure 6 Figure 8

Claims (1)

[Scope of Claims] 1. An electrophotographic apparatus having a magnification conversion function, comprising: a document table having a transparent plate and a fixing part for identifying the transparent plate to the main body; a liquid crystal display section provided on the document table; A control device for driving a front ML liquid crystal display section according to the paper size and copying magnification at the time, and a small document table device characterized in that the liquid crystal display section displays a copyable area on the document table. 2. The document table device according to claim 1, wherein the liquid crystal display section 15 is provided around the transparent plate. 3. The document table device according to claim 2, characterized in that a liquid crystal display section is provided on the fixed section and displays a copyable area. 4. The document table device according to claim 1711, wherein the liquid crystal display section is made of a reflective liquid crystal display plate. 5. The II+1 combination device as set forth in claim 3, wherein the liquid crystal display section is a small one made of a transmissive liquid crystal display panel. 6. The document table device according to claim 1, wherein a liquid crystal display section is provided on a transparent plate, and the width and length of the printable area are displayed on the transparent plate.