JPS6014229A - Sheet size display device of picture recording device - Google Patents

Abstract

PURPOSE:To read easily a copying size and an original size by constituting the titled device so that a size display sheet on which plural sheet sizes are put down is wound out so as to cover the lower face of a platen glass when an exposing lamp stands still, and it is wound into a containing part when the exposing lamp moves. CONSTITUTION:A size display sheet 23 is placed so as to cover the lower face of a platen glass 1, along the lower side of the platen glass 1, its one end is connected onto a fitting base 5' of an exposing lamp 5, the other end is connected so as to be wound to a winding shaft 25, usually the size display sheet 23 covers the lower face of the platen glass 1, and when an original is exposed, said sheet is wound to the winding shaft 25 as the exposing lamp 5 moves in the direction A shown in the figure, therefore, it does not obstruct the exposure. Marks of plural prescribed sheet sizes are put down by a point or a line on the size display sheet 23, and a prescribed LED corresponding to a selected origianal size and copying paper size is lighted and displayed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a document size display device and a transfer paper size display device in an image recording device of an electrophotographic copying machine. The present invention relates to a display device that displays the size of a document in an easy-to-read manner through the glass of a document table.

Generally, in an image recording device such as an electrophotographic copying machine, a document is placed on a transparent document table, and an exposure lamp is used to illuminate the document from the bottom surface, and this reflected light is passed through an optical system such as a lens to form an image on a photoreceptor, etc. Many of them are configured to project onto a carrier, but for example, in the case of full-size copying with a copying machine, the copyable area for the selected copy paper size is the same as the copy paper size, Therefore, the user only has to align one end of the document with the reference side of the document table so that the document falls within the range indicated by a size scale or the like provided along the reference side.

However, with copying machines that can select and use multiple copy paper sizes and are equipped with a variable magnification function, the size of the copy paper and the copyable area do not necessarily match, so the original size and copy It is extremely troublesome for the user to select the optimal copy paper and size depending on the magnification, or to judge what kind of original can be used with the selected copy paper size and copy magnification. ,
Problems often arise, such as using unnecessarily large copy paper or using copy paper that is smaller than the desired image.

Figures 1 and 2 are plan views of a document tray equipped with such conventional document size display, in which 1 indicates the platen glass, and 2 and 3 indicate document placement reference sides. .

A mark indicating the document size is mainly placed on the document placement reference side.

By the way, in the above-mentioned apparatus, the determination of the transfer paper size or the copyable area is mostly left to the user, and the maximum transferable area is simply displayed on a scale for each copying magnification. However, the transferable area is not displayed in relation to the size of the transfer paper.

The present invention has been made in view of the above-mentioned drawbacks of the conventional example, and it is possible to display the document size and the transferred image size over the entire surface of the document table, thereby eliminating unnecessary It is possible to prevent the use of large copy paper or transfer paper that is too small, and therefore it is easier for the user to select a cassette, etc., and it is preferable that unsightly parts inside the machine are hidden from the document table. The object of the present invention is to provide an image recording device having a structure.

SUMMARY OF THE INVENTION To achieve such an object, the present invention provides an image recording apparatus in which an exposure rung moves along the lower side of a platen glass to expose an original. When the lamp is stationary, it is unwound to cover the lower side of the platen glass, and when the exposure lamp moves, it is arranged so as to be rolled up into a predetermined storage part, and a plurality of marks of predetermined sheet sizes are marked on the top surface. or a sheet of an image recording device, characterized in that a size display sheet with lines drawn thereon is provided, and furthermore, the marks of the plurality of sheet sizes on the size display sheet are provided with light-emitting bodies so that they can be selectively illuminated. The size display is on the device.

The present invention will be described below based on an embodiment in which the present invention is applied to an electrophotographic copying machine.

FIG. 3 shows a schematic cross-sectional view of an electrophotographic copying machine to which the present invention is applied.
An exposure lens 5 that exposes the document 4 on the grating glass 1 while moving in the direction of arrow A from the position shown in the figure is provided below.
, first to fourth mirrors 6, 7, 8, 9 for projecting the exposed image onto the photosensitive drum 11, and a lens 10 in the projection optical path. Like the above, charger 12, developer 13, transfer charger 14, separation roller 15, cleaner 16, static eliminator 17
Copy sheets appropriately selected from the cassettes 18 and 19 by paper feed rollers 20 and 21 are guided to the surface of the photosensitive drum 11 via registration rollers 22.

The first feature of this example is that the size display sheet 23 is arranged along the lower side of the platen glass 1 so as to cover the lower surface of the platen glass 1.
One end (the left end in the figure) is connected to the mounting base 5 of the exposure lamp 5 that moves when exposing the original (5), and the other end (the right end in the figure) of the size display sheet 23 is connected to the turning roller 24. The material is wound onto the winding shaft 25 via a spring force or a driving force from a motor or the like. With such a configuration, the size display sheet 23 normally covers the lower surface of the platen glass 1, and when exposing a document for copying, it is attached to the winding shaft 25 as the exposure lamp 5 moves in the direction A in the figure. It is wound up so that it does not become a support for exposure.

The second feature of this example is that the size display sheet 23 allows the size of the original and the size of the copied image to be suitably displayed.

That is, as shown in FIG. 4, on the top surface of the size display sheet 23, an appropriate original (or standard copy paper size) is indicated with a line, and the corner of each size is marked with a light emitting display, which will be described later. It is possible to use a means to display the size to be used at that time by lighting up. Reference numerals (6) 26a, 26b, . . . , 26h in FIG. 4 indicate light emitters (for example, LEDs) attached to the corners of each size. Note that 27 in FIG. 4 indicates a hole for connection to the exposure lamp mounting base 5'.

Note that the electrical wiring to these light emitters is drawn as follows, considering that the size display sheet is movable as described above.

That is, the size display sheet 23 is replaced by the base sheet 23a1.
At foil layer 23b1 on top of that, and LED 23 on top of that.
e, the transparent electrode 23d1 is laminated with the transparent insulator 23e, and this uppermost layer insulator is 28a, 28 shown in FIG.
b...Remove the 28h part. A current-carrying roller 29a is electrically connected to each IJD at a position facing the turning roller 24 in contact with the size display sheet 23 shown in FIG.

29b...29b, and by connecting this current-carrying roller to the control circuit 31 via the light emission output circuit 30 as shown in FIG. 6, it is possible to selectively light up the desired IJD. be.

Note that 32 in FIG. 3 is a cassette size detection circuit that detects the type of cassette of a predetermined size installed during copying, and this detection information is input to the control circuit and is also input from the operation unit 33. Information on the copy paper size used is also input to the control circuit 32, which lights up a predetermined LED corresponding to the selected original size and copy paper size when the copying machine is used. For example, when copying an A4 size manuscript at the same size, the LEDs 26 b and 26 h are set to correspond to this.
It causes the light to emit light.

In addition, when performing variable-reduction copying, for example, if you input the size of the copy paper into the operation panel according to the size of the original to be used,
The corresponding LED lights up, and furthermore, the position where the document should be placed can also be lit up.

For example, if you reduce a standard A4 size to an A5 size, you will understand that the copy paper will be this size when setting the original, and it will be very difficult for people who are using a copy machine for the first time or who do not know the size of copy paper. It is convenient for In addition, in the case of originals larger than the standard A4 size, if the area to be copied is included in the area indicated by the light from the lower LED passing through the original, it can be copied onto copy paper with a corresponding reduction magnification. can be easily understood. On the other hand, if the original is equivalent to or larger than the standard A3 size, and the area to be copied is smaller than the A3 size, you can change the LED display sequentially by commanding from the operation panel. The feature is that it is easy to understand the required original size and copy paper size. Therefore, by arranging a large number of IJDs, the sheet size display device of the present invention becomes a particularly effective method for a device with a continuously variable optical system.

Regarding the lighting of the above IJD, the original size is lit and the copy size is blinking, or the LED
There may also be a method in which the O color is set to two colors, one color is specified as the original size, and the other color is specified as the copy size, or furthermore, if the transfer paper cassette at that time does not match, it will blink. It is. It is also possible to connect the letters A3 and B4 shown in Fig. 4 with separate transparent electrodes for light emitting display (9). The original size and transfer paper size may be differentiated depending on the brightness difference.

Also, in the above explanation, it is assumed that the LED is turned on when copying has started, but in order to save energy, the LED is turned on when the document platen cover is opened. You can also do this.

Note that Figures 7 and 8 show what it looks like through the platen glass when such a size display sheet is used, and as is clear from these figures, the document base wall is on one side. It may be close to one side or in the center.

As described above, according to the present invention, with the structure in which the size display sheet device is attached, the copy size and original size can be easily read, and all four sides of the original can be adjusted to the reference sides. It has the effect of being able to do things, and its usefulness is like a dog.

(10)

[Brief explanation of the drawing]

The drawings are only for explaining the present invention; FIGS. 1 and 2 show an example of conventional document size display, and FIG. 3 is a schematic diagram of the configuration of a copying machine to which the present invention is applied. , FIG. 4 is a plan view of the size display sheet, FIG. 5 is a partial sectional view of the same, FIG. 6 is a perspective view of the energized roller, and FIGS. 7 and 8 are views of the size display sheet according to the present invention. FIG. 2 is a diagram showing a state seen through the platen glass of a copying machine. 1 Nibraten glass 2, 3: Original standard 4: Original 5:
Exposure lamp 5': Mounting base 6, 7, 8.9: Mirror 10: Lens
11: Photosensitive drum 12: Charger 13: Developing device 14: Transfer charger 15: Separation roller 16: Cleaner 17: Static eliminator 18, 19: Cassette 20, 21: Paper feed roller 2
2 Ni registration roller 23: Size display sheet 24: Turning roller 25: Rewinding shaft 26: LED 27: Connection hole 28: Current-carrying part 29: Current-carrying roller 30: Light emitting circuit 31: Control circuit 32: Cassette size detection circuit 33: Operation section

Claims (1)

[Claims] In an image recording apparatus that exposes a document by moving an exposure lamp along the lower side of a platen glass, when the exposure lamp is stationary, the exposure lamp is unwound to cover the lower side of the platen glass, and the exposure lamp is unwound to cover the lower side of the platen glass. A size display sheet is arranged so as to be rolled up into a predetermined storage section by movement of the size display sheet, and a plurality of marks of a plurality of predetermined sheet sizes are dotted or lined on the upper surface, and further a plurality of sheets of the size display sheet are provided. A sheet size display device for an image recording apparatus, characterized in that a size mark is provided with a light emitter that can be selectively turned on.