JPH0462537A - Image forming device - Google Patents

Abstract

PURPOSE:To prevent an original from deviation by providing a viewing window on an original cover, and to prevent an operational mistake by displaying an image forming state through the viewing window. CONSTITUTION:In the case of looking through the viewing window 15a after placing the original 14 on an original platen 12 and closing the original cover 15, the state of the original 14 can be viewed. When a copying key 3 is depressed after confirming that the original 14 is placed on a desired position, the original 14 is covered with a platen sheet 17 and held by the sheet 17 in a press-contact state. simultaneously, the characters in copying are displayed in the frame of the viewing window by a displaying means 19a. When the arrival of the sheet at the covering position is detected, a signal is inputted to a controller so as to start copying. After the end of copying, the sheet 17 is moved, and the viewing window 15a is released, and simultaneously the characters in copying by the displaying means 19a is unable to be viewed, and then the device is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to an image forming apparatus in which the positioning state of a document can be confirmed after closing a document cover.

(Prior Art) Generally, an image forming apparatus such as a copying machine places a document on a document table made of a glass plate, and covers the document cover with a document cover that is attached to the document table and holds the document under pressure. , copying as image formation is started. Furthermore, when placing a document, the document is positioned by abutting against a positioning scale provided at one end of the document table.

However, when closing the document cover after positioning, the document is often agitated and deviated from the predetermined position, resulting in a large number of defective copies.

To prevent such defective copies from occurring, it is necessary to gently close the document cover. However, this significantly reduces work efficiency, and there has been a demand for countermeasures against this.

Therefore, it has been considered to provide a viewing section, for example, a viewing window, on the document cover to confirm the position of the document after the document cover is closed.

For example, a window is provided as a viewing part in the housing that constitutes the document cover, and a document holding member (hereinafter referred to as a platen sheet) is made movable.When the document cover is closed, the platen sheet is retracted from the viewing part and the document is The platen sheet is moved to close the viewing window before copying starts, the original is covered and pressed, and the platen sheet is evacuated from the viewing window after copying is completed. .

Although this can reliably prevent the occurrence of the above-mentioned copying defects, it is necessary to reliably move the platen sheet to the covering or retracting position before and after copying, which may lead to a decrease in work efficiency. . To avoid this, after placing the original, close the original cover, confirm the positioning of the original, and then input the copy key as an instruction to start image formation.The platen sheet will automatically close and the copy A device is also being considered in which the platen sheet is evacuated when the copying process is started and the copying process is completed.

However, with this configuration, an operator who is not familiar with such a device has no idea what stage the copying process is in after the copy key is pressed manually, and there is a risk of accidentally opening the document cover during copying.

Furthermore, the same applies to devices that operate the platen sheet separately from the copy key, and after the platen sheet is closed, it is possible to accidentally open the document cover without realizing that copying is in progress. There is a risk of it opening.

(Problem to be Solved by the Invention) As described above, a device has been proposed in which a viewing part is provided on the document cover to check the positioning of the document and prevent the occurrence of copy defects. If the platen sheet is left closed afterwards, it is unclear whether or not copying is in progress, and an inexperienced operator may make an operational error such as opening the platen sheet inadvertently.

The present invention has been made in view of the above-mentioned circumstances, and includes a visual confirmation section to confirm the positioning of the document and to prevent operational errors from occurring after closing the platen sheet.1.
The object of the present invention is to provide an image forming apparatus with improved performance.

[Structure of the Invention (Means for Solving the Problem) In order to achieve the above object, an image forming apparatus of the present invention covers a document on a document table with a document cover, and transfers an image of the document onto an image carrier. In an image forming apparatus that forms an image, the document cover includes a housing that can be opened and closed with respect to the document table and has a viewing section for checking the positioning state of the document when the document cover is closed; a document holding member that covers the document that is visible from the viewing section between the parts and has a display section that is visible from the viewing section at this position; and a document holding member that allows the document to be viewed independently of the housing. a moving means for moving the document between the retracted position and the covering position; and a moving means that detects the image forming state through the visual recognition section provided on the document holding member when the document holding member is in the covering position. An image forming apparatus is characterized in that it includes a display means for displaying a display indicating that the image forming apparatus is an image forming apparatus.

(Function) The present invention is configured such that a viewing portion is provided in the housing of the document cover, and when the document cover is in the closed state, a platen sheet serving as a document holding member can be freely covered and retracted from the document in the viewing position. This allows you to check the positioning of the original with the original cover closed. Further, since the platen sheet is provided with a display section that is visible during coating and is provided with a display means for indicating that an image is being formed, when the platen sheet is closed, the content of the image forming state is displayed.

(Example) The details of the present invention will be explained below by way of an example with reference to the drawings.

The image forming apparatus of this embodiment includes a main body 1 and a document holding means 1.
1, exposure scanning means 21, paper feeding means 31, image forming means 41, paper ejection means 51, and control means 61.

Note that the present invention is based on the document holding means 11 in this embodiment.
and the control means 61; other than that, the image forming apparatus is almost the same as the conventional image forming apparatus, so we will first give an overview of each of the above-mentioned parts, and then explain the document holding means 11 and the control means, which are important components of the present invention. 61 will be explained in detail.

The main body 1 accommodates various parts, and has openings at the upper end and lower left and right sides, and an operation panel 2 at the upper front. This includes a copy key 3 which is an image forming key, a copy number setting key 5, and various other input keys necessary for operations.

Although the details will be described later, the document holding means 11 includes a document table 12 made of a glass plate that covers the upper opening of the main body, positioning scales 13a and 13b attached to both ends of the document table, and a viewing window 15a as a viewing part passing through the document table 12. The document cover 15 is provided on the main body 1 so as to be openable and closable, and the document cover 15 holds the document 14 placed on the document table 12.

The exposure scanning means 21 includes a moving first carriage 2 having a light source body 22a consisting of an illumination device and a reflecting mirror 22b.
2, a movable second carriage 24 having reflecting mirrors 24a, 24b, an imaging lens 25, and reflecting mirrors 26a, 26b, 26c.

Then, as the first carriage 22 moves, the light source body 22a
scans the original 14 without illuminating the original 14, the original 14
The reflected light from the imaging lens 2 passes through the reflecting mirror 24a124b of the second carriage 24, which moves at an appropriate speed.
5 and forms an image of the original 14 on the photosensitive drum 42 via the reflecting mirrors 26a, 26b, and 26c.

The paper feeding means 31 supplies paper P as an image carrier, and includes a manual feed cassette 32 and cassettes 33 and 34, and a pickup roller 32 according to an external signal.
The paper P taken out as appropriate by a, 33a, and 34a reaches a pair of aligning rollers 35 via a pair of feed and separation rollers 33b or 34b, and is sent to a photosensitive drum 42 at an appropriate time.

The image forming means 41 includes the above-mentioned rotating photoreceptor drum 42.
A developing device 42a, a transfer device 42b1, a peeling device 42c, a cleaner 42d1, a static eliminator 42e, a main charger 42f, etc. are arranged along the rotation direction on the outer periphery of this. Also, a conveyor 43 and a pair of fixing conveyors 44
The latent image formed on the photosensitive drum 42 by image formation is visualized by a developing device 42a, transferred to paper P by a transfer device 42b, peeled off by a peeling device 42C, and conveyed. The image is then heat-fixed by a pair of fixing rollers 44 and sent to a paper discharge means 51.

In the paper ejection means 51, the fixed paper P is transferred to the paper ejection roller pair 5.
2 and is stored in the paper discharge tray 53.

A paper discharge detector 54 is provided near the pair of paper discharge rollers 52 to detect the paper to be discharged.

The control means 61 is comprised of a control device 62 equipped with a CPU, and controls the entire image forming apparatus. However, parts similar to the conventional ones will be omitted, and parts related to the present invention will be described later.

This concludes the general explanation of the structure and operation of the entire embodiment.Next, the document holding means 11 and the control means 6, which are important components of the embodiment, will be explained.

The document cover 15 includes a housing 16, a platen sheet 17 which is a document holding member, a moving means 18, and a display means 19.
It consists of

The housing 16 is comprised of a lid-like member that covers the original platen 12 in an openable and closable manner, and in FIG. ing. This allows the document 14 in the vicinity of the positioning scale 13a to be visually recognized when the document table 12 is closed and viewed from above.

Further, a platen sheet 17 is attached to the lower surface of the housing 16, that is, on the side of the document table 12, via a member of a moving means 18, so that the viewing window 15a can be opened and closed. This is formed so as to press and hold the original 14 when the cover is closed. Then, when moving to the left end (in the direction of arrow 17a),
The viewing window 15a is configured to have an appropriate length so that it can be opened and the document can be viewed when the viewing window 15a is closed to cover the document being viewed and moved to the right end (in the direction of arrow 17b) and retreated.

Further, the left end portion of the platen sheet 17 is formed as a display portion 17c, and this portion is where the platen sheet 17 is connected to the document 1.
4 is a position that is visible from the viewing window 15a, and an indicator 1.9a consisting of characters, figures, or a combination thereof indicating that an image is being formed is formed thereon, and the display means 1.9a It consists of 19. In this embodiment, the words "Copying in progress" are written.

The moving means 18 is provided in the housing 16.

This has a sheet holder 101 into which a platen sheet 17 is fitted and held, a pair of support pins 103, 103 are attached to the right end 102, and a protruding arm 105, 105 is attached to the left end 104. It is provided. The support pins 103.103 are opposed to the support members 106.106 attached to the housing 16, and the support pins 103.103 are slidably fitted into elongated holes 107.107 provided in the support members 106.106, and the platen sheet 1
7 is attached to the housing 16 so as to be rotatable around support pins 103 and 103 and movable in the left and right directions (so that the viewing window 15a can be opened and closed).

Further, near the left end of the housing 16, a driving member for driving the platen sheet 17 to open and close is attached.

That is, a drive shaft 111 is rotatably attached, and is rotationally driven by a movement motor 113 via a gear train 112. This drive shaft 111 has a drive pulley 1
14 and 114 are attached, and a driven pulley 115 and 115 is rotatably attached to the housing 16 opposite to this.

Furthermore, a timing belt 116, 116 is stretched between both pulleys 114, 115, and is rotatably connected to the arm 105, 105 by a drive pin 117, 117. The drive pin 117 is guided and supported by guide bodies 118, 118, moves with the movement of the timing belt 116, 116, and comes off the upper surface of the guide body 118 at the drive pulley 114, 114, causing the drive pulley 114 to rotate. The rotation descends accordingly. That is, the timing belt 116 constitutes an advancing/retracting means 18a, and the drive pulley 114 constitutes an approaching/separating means 18b.

Note that, as shown in FIGS. 5 to 8, when the platen sheet 17 is at the right end, the sheet holder 101, that is, the platen sheet 17 is held high at the left end by the contact/separation means 18b. It is tilted and separated from the document table 12. In this state, advance/retreat means 1
8a, the platen sheet 17 is moved forward by a distance to the left, and at the left end, by the rotation of the pulley 114, which is the contact/separation means 18b, the platen sheet 17 is lowered by a height H, and the platen sheet 17 is pressed against the document table 12. By moving forward and backward in the left and right directions in this manner, the viewing window 15a is opened and closed, and also retreats or comes into pressure contact with the document 14 located at the position where it can be viewed.

Therefore, when the platen sheet 17 is located at the left end, the characters being copied are visible through the viewing window 15a by the display means 19, and when the platen sheet 17 is located at the right end, they are not visible through the viewing window 15a.

Next, the control means 61 will be explained.

In FIG. 12, a control device 6 constituting a control means 61
2 includes an image forming key 3, an image forming start means 4 (schematically shown collectively) which is activated by input of this key and drives various parts for image forming, and drives a moving motor 113 of the moving means 18. A moving motor driver 113 that together with the control device 62 constitutes the platen sheet operating means 113b.
a, the platen sheet 17 closes the viewing window 15a and the original 1
A covering position detector 120 covers the display means 4 and detects that one display means is in a position facing the viewing window 15a (covering position), the platen sheet 17 is retracted from the viewing window 15a, and the display means 1 is retracted from the viewing window 15a.
9 is in a position where it is not visible (retracted position), a sheet number setting key 5 for inputting a set number of sheets, a sheet number detecting means for detecting the sheet P to be discharged, and a control device 62 for detecting the number of sheets to be discharged. A paper ejection detector 54 and the like constituting 54a are connected.

Although the document holding means 11 is constructed as described above, the overall operation will be explained next with reference to the flowchart of FIG.

First, open the document cover 15. At this time, the platen sheet 17 is positioned at the right end, and the viewing window 15a is in an open state. That is, the platen sheet 17 is in a retracted position where the original 14 can be seen, and the characters being copied, which are the display means 19, cannot be seen through the viewing window. Next, place the original 14 on the original table 12 and close the original cover 15 (step P1
). When looking through the viewing window 15a, the state of the document 14 at the viewing position can be viewed together with the positioning scale 13a. At this time, it can be easily confirmed whether the document 14 is placed in the desired state as shown in FIG. 14, or if it is misaligned as shown in FIG. 15 (step P2).

After confirming that the original 14 is placed in the desired position,
After setting the number of copies, etc., press copy key 3 (image formation key) (step P3).

By inputting the copy key 3, the platen sheet operating means 1
The moving motor 113 is driven via the moving motor driver 113a of 13b.

As a result, the timing belt 1, which is the advancing/retracting means 18a,
16 is driven, the sheet holder 101 moves to the left together with the platen sheet 17, closes the viewing window 15a, and then descends by the rotation of the drive pulley 116, which is the approaching/separating means 18b, and the platen sheet 17 is moved to the left side by the original 14.
Cover and hold under pressure. At the same time, the characters being copied appear on the display means 19 at the viewing window, confirming that image formation has started. At this time, platen sheet 1
7 moves away from the original 14, so the position of the original 14 is not shifted. The reaching of this covering position is detected by the covering position detector 120, a detection signal is input to the control device 62, and the moving motor 113 is stopped (step P4).

Image formation, that is, copying, is started by inputting the detection signal. (Step ps).

When the copying of the set number of sheets is completed and stopped, the completion of copying is confirmed by the ejected sheet number detection means 548 or the like (step P6).

When copying is completed, the platen sheet operating means 113b
As a result, the moving motor 113 is driven, and the platen sheet 17 is moved in the direction of the arrow 17b, and the viewing window 15a is moved.
, reach the rightmost retracted position, and at the same time display means 1
The character 9 being copied becomes invisible through the viewing window 15a. This is detected by the retracted position detector 121 and stopped (step P7). Then, the document cover 15 is opened and the document 14 is taken out.

In this embodiment, the characters being copied are used as the display, but the display is not limited to this, and other messages with similar contents may be used.

[Effects of the Invention] As described in detail above, the image forming apparatus of the present invention is equipped with a viewing section on the document cover so that misalignment of the document can be detected even after the document cover is closed. Copy work can be performed with high efficiency without worrying about misalignment.

Further, when the platen sheet is moved to the covering position, the display unit that displays the image forming state can be seen through the viewing window by the display means, so that operational errors can be prevented.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram of an embodiment of the present invention, FIG. 2 is a top perspective view with the document cover closed, FIG. 3 is a top perspective view with the document cover open, and FIG. 4 5 is a front view of the main parts of the moving means, FIG. 6 is a perspective view of the structure of the moving means and display means, and FIG. 9 to 11 are similarly explanatory diagrams of the operation of the platen sheet, FIG. 12 is a block diagram of the control means, FIG. 13 is a flowchart explaining the operation, and FIG. This figure and FIG. 15 are also diagrams illustrating the positional deviation of the original. P・・・・・・・・・・・・・・・・・・・・・ Image carrier (paper) 3・・・・・・・・・・・・・・・・・・
Image formation key 12・・・・・・・・・・・・・・・
・・Manuscript table 14・・・・・・・・・・・・・・・・・・
・・・Manuscript 15・・・・・・・・・・・・・・・・・・
・・・Manuscript cover 15a・・・・・・・・・・・・・・・
・・・Visibility part 16・・・・・・・・・・・・・・・
...Housing] 7.........
. . . Document holding member sheet) 17c . . . Display section 18
・・・・・・・・・・・・・・・・・・ Transportation means 1
9・・・・・・・・・・・・・・・Display means (Prana

Claims (1)

[Claims] In an image forming apparatus that covers a document on a document table with a document cover and forms an image on an image carrier from an image of the document, the document cover is provided so as to be openable and closable with respect to the document table. and a housing having a viewing part for checking the positioning state of the original when the cover is closed, and a housing that covers the original that is visible from the viewing part between the housing and the document table and that is visible from the viewing part at this position. a document holding member having a display section; a moving means for moving the document holding member independently from the housing between a retracted position where the document is visible and the covering position; An image forming apparatus comprising: a display means for displaying an image forming state through the visual recognition section provided on the original pressing member when the original pressing member is in the covered position.