JPS6041027A - Platen device - Google Patents

Abstract

PURPOSE:To prevent miscopying due to an original protruded to an area to which copying is imcapable by displaying an area to which copying is capable with an indicating body which is moved forth and back according to the decisions on form size and copy magnification. CONSTITUTION:An operator when starting copying operation operates a form size detector and a magnification selecting device according to copy conditions, such as A4 form size and unmagnification copying. Then, a stepping motor 24 is rotated through a controller by a specific angle as shown by an arrow (x), and indicating bodies 18 and 19 are moved as shown by arrows (y) and (z) up to positions shown by solid lines to indicate the width of a copying area of A4 size. Consequently, the operator places an original on a glass plate 15 within the indicated copying area, and the operation of a start button is only required. Therefore, the operator need not confirm previously whether the original size is proper or not and independently the mount position of the original.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention has an enlargement, i (6 small, etc.) magnification conversion function.
? The present invention relates to a document table device for instructing a document to be placed at position 1 on a document table in a 1L secondary photographic device.

[Technical similarities and problems with the origin] Conventionally, in copying machines, etc., something like the one shown in Figure 1 has been used to display the guideline for placing the original in the copyable area on the document table. It is being

That is, this device has glass fixtures (10b) and (10c) that fix the glass plate (10a) on the document table to the main body.
J of fA'4 is attached to the front glass fixture (iob).
fr＞'Af'! The size is printed as a scale (12), and the t'l value of the document (not shown) placed on the glass plate (10'a) is displayed.

However, with this device, the paper size and copyable area do not match when printing at 100% magnification, so it is possible to clearly indicate the placement and placement of the document, but it does not have the magnification conversion function that has been widely used in recent years. It is impossible to cover up to the placement position of 94 originals to be enlarged or reduced by the device 6. That is, in a device having a magnification conversion function, the copyable area on the glass holder (10a) changes from time to time depending on the copying magnification and paper size used, and the paper rise and the copyable area do not match. From small to small, operators instantly recognize copyable areas41
If you are unable to do so, you may make a misunderstanding, or you may place the manuscript vertically or horizontally incorrectly and place it in the copy-inhibited area.
This method has the disadvantage of causing copy errors such as s it + l images being cut off.

[Object of the invention] This invention was made based on the above-mentioned considerations.
rkj photocopy and Aiwa: Rumiwa, which clearly indicates the area where copies can be made on the original dyeing table depending on the size, allows the operator to place the original with ease, and prevents copy mistakes. The purpose is to provide a mounting head.

[Invention (11) This invention
This is to prevent miscopying and improve the efficiency of the device by indicating the copyable area on the four machines.

[Embodiments of the Invention] An embodiment of the 11th page is shown in Figure 2 to tR41 below.
Nu 1 will be explained from the beginning of the 4th year. ]l The main body of the 117-child photographic device (1
4) In the upper direction, there is a glass plate (15) which is a bright plate and a glass fixture that holds this glass plate (15).
A 7'JthJ stand (1 is provided) having one end (18a), (
19a) is provided so as to be seen through from the outside through the glass plate C15), and the other end (18b).

An indicator 0 consisting of a pair of gold pieces supported by a rail (not shown) whose (19b) is defeated by a lung plate (17)
8).

αf+) is provided so that it can be moved forward 401. In addition, the company is a drive unit that moves the indicator (1B) and toυ, and includes a first stop part (21a) and a second stop part (21a).
The endless wire connected to the indicator (181, 6B+ by 21b) is the first pulley (23a), the second pulley (23b), and the m3 pulley (23C).
, the hook is passed to the fourth pulley (23d), and
The stepping motor (wound around the drive part (24a) between
VO1 is a buffer spring. −
Blade body 04) Upper control knob (flannel (14a)
Inside is a paper size detection device (key) for selecting the paper size, and [*+r: Small], [Equal size] 9 [
Magnification selection device +h, +L! 8+ is provided, and both devices (Jun,
(to)) is connected to an arithmetic circuit (81) which is part of the Ifj control device (1d). Then, the output from this first circuit (81) is input to the motor driver circuit, thereby driving the stepping motor and eventually the indicator (e).

(It will be driven by 1 inch. The scale (16a) is a scale indicating the standard document size printed on the glass fixture ([6).

Therefore, when starting copying, the operator operates the paper size detection device (z7) and the magnification selection device according to the copying conditions.
When the operator performs an operation to that effect, the stepping motor control unit 11 is rotated in the direction of the arrow
, lω, respectively, the position indicated by 4 in the second diagram is in the direction of the arrow y, two times in the direction of the arrow (=translated and stationary, [A・4
] Indicates the width of the area that can be scanned in size and becomes 9. This allows the operator to place the original image (not shown) on the glass plate within the displayable area.
After that, the document is loaded (not shown) and a start button (not shown) is operated to start the exposure and subsequent copying process. Next, if the subject conditions are, for example, the paper size is [A.4] size and [reduced] copying, the stepping motor (2) is
1 (4) l The indicators (4, 09) are rotated to a certain degree in the direction opposite to the arrow It is translated in parallel and held still, and it points to the width of the [A.3] size copy n'' other area. Furthermore, if the first copy is an [enlarged] copy with the paper size [A.
n.

α@ is shown in Fig. 2, and the position B' indicated by the dotted line is also in the direction of arrow X.

11. Translated in parallel in the two directions of arrows and held still. , [A.5]
This indicates the width of the size copyable area.

With this configuration, the copyable area is immediately indicated before starting copying according to the subject conditions, so the meperator can independently check in advance whether the original size is appropriate or not and the placement position of the original 413. There is no need to keep it in place, and all you have to do is place the Hara 4 Fuku on the nest according to the copyable area indicated by 4. This eliminates the hassle before starting copying, and also eliminates the need to copy vertically or horizontally due to misunderstandings. I made a mistake and ended up with the manuscript extending into the area where it could not be copied. This also prevents the occurrence of erroneous copies due to the +i image being cut off.

Note that this invention is not limited to the above-mentioned embodiments, and can be modified in various ways. For example, the structure of the drive section for driving the indicator may be arbitrary, and a belt may be used instead of an endless wire. Does the drive shaft (24a) of the stepping motor have a spiral shape as in the other modification shown in FIG. A shaft having a groove (34a) is connected, and an indicator (34a) is connected to the shaft.
35a), (35b) protrusions (not shown)
is fitted into the hole (a4a), and as the shaft rotates, the indicator (35a) is inserted together with the protrusion guided by the groove (34a).
), (35b) may be moved back and forth. Further, the mounting position of the indicator is also arbitrary, and it may be provided in the opposite direction of the document table to indicate the length of the copyable area. Furthermore, there are no limitations on the paper size, magnification, etc.

[Effects of the Invention] As explained above, according to the present invention, prior to the start of copying, the reciprocating movement is performed according to the determination of the paper size and the copying magnification.
Since the copyable area is immediately displayed by the indicator, the operator only needs to place the original within the copyable area indicated by the indicator, even if the operator only needs to copy in reduced size or enlarged 7y. Due to a misunderstanding, etc., the area that cannot be photographed has reached 41! The reliability of the device is improved because there is no possibility of miscopying due to protrusion.

[Brief explanation of the drawing]

Fig. 1 shows a conventional device, partially omitted - E side view, Figs. FIG. 4 is a block diagram thereof, and FIG. 5 is a top view of the drive unit and indicator showing another modification of the present invention. 14.・Main body 15...Glass JJj16...Glass fixture 17...k r=Base 18.19...
Indicator 20...Kaku! IIIJ section 21a...First hooking part 21b...Second stopper capital 22...Endless wire 24...Stepping motor 24a...Pulling shaft 2
7...Paper size detection device Ah...Magnification selection device 6
30... Control device agent Patent attorney Mr. Inoue Figure 1 Figure 2 Figure 3 Figure 5

Claims (1)

[Claims] 1. In an electrophotographic apparatus having a magnification conversion function, a document table having a transparent plate, a movable f1-eye indicator provided at least partially in a visible state opposite to the document table, and a reciprocating device for moving this pointer. a drive section for moving the document; and a control device for controlling the moving section according to the paper size and copying magnification at the time of copying; A document table device featuring: