JPH05289201A - Image forming device - Google Patents

Abstract

PURPOSE:To provide an image forming device in which the copying range of an original can be confirmed corresponding to the size of a transfer paper and miscopying is perfectly prevented. CONSTITUTION:In a copying machine main body 10, an original platen 5 is provided so as to freely act at a position where it closes an opening part 50 and a position where it projects from the copying machine main body 10. A liquid crystal panel 6 is provided on the original platen 5. When the size A4 is selected, for example, a range corresponding to the size A4 becomes in a state where light is transmitted on the panel 6. The panel 6 and the original 7 are projected on a mirror 3 and observed so as to confirm whether or not the original 7 is correctly placed in the range on the panel 6, where the light is transmitted, and whether or not the copying range is proper.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus such as a copying machine.

[0002]

2. Description of the Related Art In a document checking device for an image forming apparatus disclosed in Japanese Patent Laid-Open No. 61-278872, a document for copying is placed and the whole document is projected from the main body of the image forming apparatus. It is provided with a document table which can be moved to a position, and a mirror which can project the entire document at a position projected from the main body of the image forming apparatus. In the document checking device of this image forming apparatus, the document placing table is projected from the main body of the image forming apparatus to check the state of the document, so that the document can be checked as it is in the set state, and the document can be easily set to prevent miscopying. I am trying to prevent it.

[0003]

However, in the above-mentioned conventional image forming apparatus, since the copy range of the original cannot be confirmed, erroneous copying cannot be completely prevented. For example, when copying a part of an A3 size original document onto an A4 size transfer sheet, it is not possible to confirm which range of the original document is the copy target, so there is a risk of copying an unnecessary part. The present invention has been made in view of the above conventional problems, and provides an image forming apparatus capable of confirming a copy range of a document in accordance with the size of a transfer sheet and completely preventing miscopy. The purpose is to

[0004]

According to a first aspect of the present invention, an image forming apparatus main body and an original to be copied are placed, and the original placing table is movable to a position protruding from the image forming apparatus main body, and the image forming apparatus. In an image forming apparatus having a mirror that reflects an original placed on an original placing table at a position projecting from the apparatus main body, a copy range display means for displaying the copy range of the original placed on the original placing table on the mirror. An image forming apparatus comprising:

According to the second aspect of the invention, the copy range display means is
2. The image forming apparatus according to claim 1, wherein the range corresponding to the size of the transfer paper used on the document table is a liquid crystal panel that is in a light transmitting state or a light non-transmitting state.

According to the invention of claim 3, the copy range display means is
The image forming apparatus according to claim 1, wherein the frame is a frame corresponding to a size of a transfer sheet drawn on a document pressing member that operates in a state of covering the document placing table and a state of being separated from the document placing table.

According to a fourth aspect of the present invention, in the first aspect, there is provided a transparent closing member that closes an opening of the image forming apparatus in a state where the original placing table is moved to a position protruding from the main body of the image forming apparatus. And an image forming apparatus.

[0008]

According to the first aspect of the invention, the original for copying is placed on the original placing table, and the original placing table is moved to a position where it is projected from the main body of the image forming apparatus. Then, by confirming the copy range of the document projected on the mirror and the document projected by the copy range display means, it is possible to judge whether the document is in the proper position. Therefore, the occurrence of miscopy can be prevented. According to the second aspect of the invention, the liquid crystal panel arranged on the document placing table is in a light transmitting state or a light non-transmitting state corresponding to the copy range of the document placed on the document placing table.

According to the third aspect of the present invention, when the original is placed on the original placing table and the original holding member is covered by the original holding member, the frame corresponding to the size of the transfer paper drawn on the original holding member is a mirror. You can check the copy range of the original. In the invention of claim 4, since the closing member closes the opening of the image forming apparatus even when the document placing table is moved to the position where it is projected from the main body of the image forming apparatus, foreign matter such as dust is left inside the image forming apparatus. Can be prevented from entering.

[0010]

Embodiments of the present invention will be described with reference to the drawings. The first to fourth embodiments corresponding to claim 1 and claim 2
Examples will be described. FIG. 1 shows a copying machine 100 as an image forming apparatus. In the figure, reference numeral 10 indicates a copying machine main body as an image forming apparatus main body.
0 is equipped with a device such as a scanner 12 as a copying unit. Further, the copying machine main body 10 has an upper surface opening 50.
Is provided. Reference numeral 5 indicates an original placing table, and the original placing table 5 is provided with a pair of rails 8. The pair of rails 8 are slidably fitted to a pair of rails 9 provided on the copying machine main body 10, and the document table 5 has a position for closing the opening 50 and a position for projecting from the copying machine main body 10. Can work on.

The original placing table 5 is provided with a liquid crystal panel 6, and the liquid crystal panel 6 is divided into a matrix. The liquid crystal panel 6 is composed of a glass plate 16 and a glass plate 17, and a liquid crystal 18 arranged between them. As shown in FIG. 4, the liquid crystal 18 has a power source 52 connected to each of the sections 15 forming the matrix of the liquid crystal panel 6, and as shown in FIG. As shown in b), it becomes a light transmitting state. Liquid crystal 1
Reference numeral 8 indicates a full-light-transmitting state when the document placing table 6 is in a position to cover the opening 50, and is described below when the document placing table 6 is in a position protruding from the copying machine body 10. Works like.

As shown in FIG. 1, a document holding plate 1 is attached to a document placing table 5 so as to be openable and closable.
Operates in a state of covering the document placing table 5 and a state of being separated from the document placing table 5. Reference numeral 4 indicates a mirror support, on which the mirror 3 is attached in a slightly inclined posture. The mirror support base 4 is installed in the paper feed cassette 2 which is attached so as to project from the copying machine main body 10.

Next, the operation of confirming the copy range of the original document of the copying machine 100 will be described. The original 7 is placed on the liquid crystal panel 6 at a position where the original placing table 5 is projected from the copying machine main body 10. Then, as a desired transfer paper size, for example, A
Select 4 sizes. When the A4 size transfer paper is selected, the section 15 in the range corresponding to the A4 size of the liquid crystal panel 6 is cut off as shown in FIG. 4A, and the A4 size of the liquid crystal panel 6 is shown as shown in FIG. The range corresponding to the size becomes the light transmission state. The liquid crystal panel 6 is displayed on the mirror 3, and by observing the mirror 3, it is confirmed whether the original 7 is properly placed in the light transmitting state of the liquid crystal panel 6, and whether the copy range is proper. .. Then close the document holding plate 1,
The original placing table 5 is pushed to bring the original placing table 5 into a state of covering the opening 50, and the original 7 is copied.

Since the copying machine according to the following embodiments has substantially the same structure as the copying machine according to the first embodiment, only the differences from the copying machine according to the first embodiment will be described. The same reference numerals as those in the first embodiment are used for the members having the same configurations, and the description thereof will be omitted. The liquid crystal panel 6 has the liquid crystal 18 arranged on the entire surface. However, like the liquid crystal panel 56 of the copying machine according to the fifth embodiment shown in FIG. 5, a scale 28 is provided on the document table 6 and the scale 28 is used as a reference for one side. As an alternative, the liquid crystal 18 may be arranged on the opposite side of the scale 28 at the corner portion of the range corresponding to the transfer paper size. Further, the liquid crystal 18 may be arranged in a line like the liquid crystal panel 66 of the copying machine according to the third embodiment shown in FIG. In these liquid crystal panels 56, 66, since the range in which expensive liquid crystals are arranged is small, the cost can be kept low.

The liquid crystal panel 76 of the copying machine according to the fourth embodiment shown in FIG. 7 corresponds to the reduction and enlargement when the original 7 is reduced and enlarged in the copying machine having the variable magnification function. The range can be displayed. The state shown in the figure shows the copy range when the original 7 is reduced and copied. The switching between the light transmission state and the light non-transmission state of the liquid crystal 18 is performed according to the size of the document and the like.
0 may be operated manually, or may be automatically operated in conjunction with a document size setting switch or a transfer paper size detection device provided in the copying machine body 10. ..

A fifth embodiment corresponding to claims 1 and 3 will be described with reference to FIGS. 8 to 10. The original placing table 5 of the copying machine according to the fifth embodiment is provided with a contact glass in which liquid crystal is not arranged instead of the liquid crystal panel 6. In the figure, reference numeral 61 indicates a document pressing plate, and this document pressing plate 61 is similarly attached to the same position as the document pressing plate 1 described above. A sponge member 24 is attached to a side of the document holding plate 61 that comes into contact with the contact glass.
Is covered with. A frame 55 corresponding to the transfer paper size is printed on the contact member 23.

In this copying machine, when the original 7 is placed on the original placing table 5 and the original pressing plate 61 is closed, as shown in FIG.
The original 7 and the contact member 23 are projected on the mirror 3 in an overlapping manner. By observing this, it is confirmed whether or not the original 7 is properly placed in the range of the frame 55 corresponding to the transfer paper used, and whether or not the copy range is proper. Then, the original 7 is copied.

A sixth embodiment corresponding to claim 4 will be described with reference to FIG. A cover glass 13 covering the opening 50 is attached to the copying machine 110 according to the sixth embodiment. The cover glass 13 is located below the original placing table 5 when the original placing table 5 covers the opening 50 of the copying machine main body 10, and the original placing table 5 is located in the copying machine main body 1.
Even when it moves to a position projecting from 0, it covers the opening 50. Therefore, even if the document table 5 moves from the copying machine main body 10, it is possible to prevent foreign matter from entering the copying machine main body 10 through the opening 50.

[0019]

As described above, according to the present invention, it is possible to confirm the copy range of a document in accordance with the size of the transfer paper, and to completely prevent erroneous copy. Further, according to the invention of claim 4, even if the document placing table is moved to a position protruding from the main body of the image forming apparatus, it is possible to prevent foreign matter such as dust from entering the main body of the image forming apparatus.

[Brief description of drawings]

FIG. 1 is a perspective view of a copying machine according to a first embodiment of the present invention.

FIG. 2 is a plan view of a liquid crystal panel included in the copying machine according to the first embodiment of the present invention.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a diagram for explaining a light transmission state and a light non-transmission state of the liquid crystal panel.

FIG. 5 is a diagram showing a liquid crystal panel projected on a mirror of a copying machine and a document placed on the liquid crystal panel according to a second embodiment of the present invention.

FIG. 6 is a diagram showing a liquid crystal panel displayed on a mirror of a copying machine according to a third embodiment of the present invention and a document placed on the liquid crystal panel.

FIG. 7 is a diagram showing a liquid crystal panel displayed on a mirror of a copying machine and a document placed on the liquid crystal panel according to a fourth embodiment of the present invention.

FIG. 8 is a plan view of an original pressing plate provided in a copying machine according to a fifth embodiment of the present invention.

FIG. 9 is a side view of a document holding plate provided in a copying machine according to a fifth embodiment of the present invention.

FIG. 10 is a view showing a document holding plate and a document placed on a contact glass, which is projected on a mirror of a copying machine according to a fifth embodiment of the present invention.

FIG. 11 is a perspective view of a copying machine according to a sixth embodiment of the present invention.

[Explanation of symbols]

 3 mirror 5 document placing table 6 liquid crystal panel 13 cover glass 50 opening 56 liquid crystal panel 66 liquid crystal panel 76 liquid crystal panel 7 document 10 copy machine body 61 document holding plate 55 frame corresponding to the size of the transfer paper 100 copy machine 110 copy machine

Claims (4)

[Claims] 1. An original placing table on which an image forming apparatus main body and an original to be copied are placed and which can be moved to a position protruding from the image forming apparatus main body, and an original placing table which is protruded from the image forming apparatus main body. An image forming apparatus having a mirror for displaying a placed document, the image forming apparatus comprising copy range display means for projecting a copy range of the document placed on the document table on the mirror. .. 2. The copy range display means is a liquid crystal panel which is arranged on the document mounting table and in which a range corresponding to a copy range of a document placed on the document mounting table is in a light transmitting state or a light non-transmitting state. 1. The image forming apparatus of 1. 3. The copy range display means is a frame corresponding to the size of the transfer paper drawn on the document pressing member that operates so as to cover the document mounting table and separate from the document mounting table. Image forming apparatus. 4. The transparent closing member according to claim 1, further comprising a transparent closing member that closes an upper opening of the image forming apparatus in a state where the document placing table is moved to a position projecting from the image forming apparatus main body. Image forming apparatus.