JPH1124347A - Image reading and recording device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a user to easily operate the device and to improve operability by simple constitution to provide an original placing part with the releasing means of a driving means. SOLUTION: A driving rack 21 is held on a rack board 35 arranged on the lower surface of an original platen 3 through 1st and 2nd links 32 and 33. One end of the link 32 is coupled with the rack 21 and the other end thereof is coupled with the link 33. The link 33 is coupled with the rack board 35 and energized by a spring 34 in a direction that the rack 21 is pressed to a driving gear 22a. By depressing a button 31, meshing between the gear 22a and the rack 21 is released and the original platen 3 is moved to open an opening/closing door. Since the original platen 3 is provided with the releasing means of the driving means, the user can largely move the original platen 3 while depressing the button by one hand. Therefore, the user can very easily operate the device and the operability is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reading and recording apparatus such as a copying machine with a movable document table.

[0002]

2. Description of the Related Art Conventionally, in an image reading and recording apparatus of this type, a document placing table as a document placing table slides in the left-right direction when viewed from the front of the apparatus above an apparatus body serving as an image reading and recording section. Generally, an original on a table is read by a reading means such as a fixed reading sensor provided in the apparatus main body.

In such an image reading and recording apparatus,
A driving gear as a driving unit of the document table driving means provided in the apparatus main body is meshed with a driving rack as a driven part provided on the document table, and the document table is rotated by rotating the driving gear. Moving.

When replacing the drum cartridge including the photosensitive drum or removing a paper jam in the main body, the document mounting table is largely moved to one side with respect to the main body, and the door at the top of the main body is moved together with the drum cartridge. Will open.

In order to move the document table with respect to the main body largely to one side, it is necessary to release the engagement between the drive gear and the drive rack. At this time, the engagement means is provided by a release means provided at the rear of the apparatus main body. Cancellation had been performed.

FIG. 7 shows an example of the driving means and the releasing means. This is a schematic cross-sectional view of the drive means as viewed from the side of the apparatus, and 100 is a release lever as release means.

During normal image formation, the drive gear 102 is rotated by driving the motor 101, and the drive rack 103 and the document table 104 move on the rails integrally.

When the door at the top of the main body A is opened, the release lever 100 is moved downward and the spring 1
By moving the drive gear 102 to the right in the drawing against the urging force of 06, the mesh between the drive rack 103 and the drive gear 102 is released.

In general, the drive gear and the drive rack are provided at the rear of the apparatus so as not to obstruct the image recording section in terms of layout. When the engagement between the drive rack and the drive gear is released, the original is placed. The mounting table freely moves on the rails within a certain range of the rails, and the opening / closing door of the apparatus main body can be opened.

[0010]

However, as described above, the drive gear and the drive rack are generally provided at the rear of the apparatus so as not to interfere with the image recording section in terms of layout. And the like are also provided at the rear of the apparatus.

When the user removes the jammed sheet from the apparatus or replaces the drum cartridge of the image reading / recording apparatus, the user can press the release lever at the rear of the apparatus which is invisible to the user or press and hold the original. The table must be moved and the work is troublesome.Especially when the device is mounted on the wall, the release lever cannot be operated unless the device is moved,
It was very inconvenient.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems of the prior art, and an object of the present invention is to provide a user-operable and easy-to-use image reading apparatus with a simple structure, which can be easily operated by a user. A recording device is provided.

[0013]

According to the present invention, in order to achieve the above object, there is provided a movable original placing section, reading means for reading an image on an original, and recording means for recording an image on a sheet. An image reading and recording unit comprising: a driving unit provided on one of the document placing unit and the image reading and recording unit; and a driven unit provided on the other, and the document placing unit An image reading and recording apparatus having a driving unit that slides on the image reading and recording unit, wherein a release unit for the driving unit is provided in the document placing unit.

[0014] It is also preferable that the driving section has a driving gear, the driven section has a driving rack, and the releasing means is means for releasing the engagement.

The drive gear is provided on the image reading / recording section, the drive rack is provided on the document placing section, and the release means engages the drive rack by moving the drive rack in the radial direction of the drive gear. Is preferably a means for canceling.

On the other hand, a drive gear is provided on the image reading / recording section, and the drive rack is provided on the document placing section,
It is also preferable that the release means is means for releasing the engagement by moving the drive rack in a direction parallel to the axis of the drive gear.

[0017]

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the dimensions of the components described in this embodiment,
The material, shape, relative arrangement, and the like are not intended to limit the scope of the present invention only to them unless otherwise specified.

(First Embodiment) An image reading and recording apparatus according to a first embodiment of the present invention is shown in FIGS. An image reading / recording section B provided with reading means for reading an image on the sheet and recording means for recording an image on a sheet; and driving means C for sliding the original placing section A on the image reading / recording section B. I have.

FIG. 1 shows a releasing means which is a characteristic part of the present invention, and FIG. 2 is a schematic sectional view of an entire image reading / recording apparatus to which the releasing means can be applied. 3 and 4 are views for explaining the operation of the document placing section, and FIG. 5 is an explanatory view showing a state in which an opening / closing door is opened.

First, a schematic configuration of the entire apparatus will be described with reference to FIGS.

1 is an image reading and recording apparatus, 2 is a conveyor belt,
Reference numeral 3 denotes a document table as a document table that reciprocates in the direction of arrow a, and 4 denotes a photosensitive drum that rotates in the direction of arrow b.
Is a developing device, 6 is a short focus lens, 7 is a charger, 8 is a transfer discharger, 9 is a feed roller, 10 is a tray, 11 is a document illumination lamp, 12 is a discharge roller, 13 is a registration roller, 1
Reference numeral 4 denotes a fixing device, and P denotes transfer paper as a sheet.

The transfer paper P is placed on a tray 10 and separated and fed one by one by a feeding roller 9. The single transfer sheet is fed to the photosensitive drum 4 by the registration roller 13 at a predetermined timing.

On the other hand, the original table 3 slides from the state shown in FIG. 3A to the state shown in FIG. 3B, and at the same time, the original illumination lamp 11 illuminates the original on the original table 3. The reflected light is incident on the photosensitive drum charged in advance by the charger 7 via the short focus lens 6 as a reading unit, and forms a latent image of an original image on the photosensitive drum 4.

The latent image on the photosensitive drum 4 is turned into a toner image by the developing device 5 and is transferred by the transfer discharger 8 onto the transferred transfer paper P.

The transfer paper P on which the toner image has been transferred is conveyed to the fixing device 14 by the conveyance belt 2 and is fixed.

Next, the driving means C will be described with reference to FIG. FIG. 4 is a partially broken cross-sectional view when the device is viewed from the back. 21 is a drive rack as a driven part,
Reference numeral 22 denotes a driving unit, and reference numeral 22a denotes a driving gear.

The drive gear 22a of the drive section 22 is meshed with the drive rack 21, and the drive gear 22a is rotated by a motor (not shown), so that the document table 3 and the drive rack 21 are moved from the state shown in FIG. It is configured to slide to the state of b).

Here, when a jam occurs in the image reading / recording apparatus, when toner is supplied to the developing device 5, or when a process cartridge including the photosensitive drum 4 is replaced, the opening / closing door 20 (FIG. 2) is used. However, in order to open the opening / closing door 20, the document table 3 must be largely moved to the position shown in FIG.

For this purpose, while the button 31 is pressed to release the engagement between the drive rack 21 and the drive gear 22a, the document table 3 is largely moved to open the door 20 (FIG. 5).

Next, the releasing means, which is a characteristic part of the present invention, will be described.

FIG. 1 is a schematic explanatory view of a mechanism for releasing the engagement between the drive rack 21 and the drive gear 22a by pressing the button 31. As the release means, a button 31, first and second links 32 and 33, and a spring 34 are provided to make the drive rack 21 movable up and down.

(A) shows a driving rack 21 and a driving gear 22a.
Are engaged with each other, and a normal image reading and recording operation is performed. The drive rack 21 is held via a first link 32 and a second link 33 on a rack table 35 provided on the lower surface of the document table 3. The first link 32
One end is connected to the drive rack 21 and the other end is connected to the second link 3.
3 is connected. The second link 33 is connected to the rack base 35. The second link 33 also includes a spring 34
Accordingly, the drive rack 21 is urged in a direction of pressing the drive rack 21 against the drive gear 22a.

FIG. 4B shows a state in which the drive gear 22 a is disengaged from the drive rack 21 by pressing the button 31, and the original table 3 is movable to open the door 20. . When the button 31 is pressed, the second link 33 rotates clockwise, lifts the drive rack 21 via the first link 32, and releases the engagement with the drive gear 22a.

In the mechanism shown in this figure, when the hand is released from the button 31, the state returns to (a). However, even if the hand is released using push-cancellation using a heart cam or the like or a toggle, which is a known technique, (b) May be maintained.

The lever is not limited to the button, and the second
A configuration that holds down the link 33 or a configuration in which the button and the link are directly connected may be used.

Although the button 31 is provided near the center of the document table 3 as shown in FIG. 5, it may be located at another position.

As described above, since the release means of the driving means is provided on the document table, the user can largely move the document table while pressing the button with one hand, and can operate the apparatus very easily, improving usability. I do.

(Second Embodiment) FIG. 6 shows a releasing means applicable to an image reading and recording apparatus according to a second embodiment of the present invention.

In the first embodiment, the driving rack 2
1 are displaced in the radial direction of the drive gear 22a to release their engagement. In the present embodiment, the drive rack 21 is moved in a direction parallel to the axis of the drive gear 22a to release their engagement. I do.

(A) shows a driving rack 21 and a driving gear 22a.
Are engaged with each other, and a normal image reading and recording operation is performed. The opposite end of the drive rack 21 is inserted into the rail 45.

The first link 42 has one end connected to the rail 45 and the other end connected to the second link 43. Second
The link 43 is connected to the drive rack 21. The drive rack 21 is urged by a spring 44 in a direction in which the drive rack 21 and the drive gear 22a mesh.

FIG. 4B shows a state in which the driving gear 22 a and the driving rack 21 are disengaged by pressing the button 41, and the document table 3 is movable to open the opening / closing door 20. . When the button 41 is pressed, the first link 42 rotates counterclockwise, and pushes the drive rack 21 via the first link 32 against the spring 44 to release the engagement with the drive gear 22a.

As described above, since the release means of the driving means is provided on the document placing table, the user can largely move the document placing table while pressing the button with one hand, which is very easy to operate and improves usability. I do. Further, in the present embodiment, since the drive rack is configured to be moved laterally, it is possible to provide a release unit in which the thickness of the document placing table is thin.

Since other configurations and operations are the same as those of the first embodiment, the same components are denoted by the same reference numerals and description thereof will be omitted.

[0045]

According to the present invention, since the release means of the driving means is provided in the original placing portion, it is possible to provide a user-friendly image reading and recording apparatus which is easy to operate by the user with a simple structure.

Further, if the driving means is constituted by a driving rack and a driving gear, and the releasing means is configured to release the meshing in the radial or axial direction, a simple mechanism can be used. Become.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a release unit used in an image reading and recording apparatus according to a first embodiment of the present invention.

FIG. 2 is a schematic configuration diagram of an image reading and recording apparatus according to the first embodiment of the present invention.

FIG. 3 is a diagram illustrating an operation of a document table of the image reading and recording apparatus according to the first embodiment of the present invention.

FIG. 4 is a diagram showing an operation of a document table of the image reading and recording apparatus according to the first embodiment of the present invention.

FIG. 5 is a view of the image reading and recording apparatus according to the first embodiment of the present invention, in which an opening / closing door is opened.

FIG. 6 is a schematic configuration diagram of a release unit used in an image reading and recording apparatus according to a second embodiment of the present invention.

FIG. 7 is a schematic configuration diagram of a release unit used in a conventional image reading and recording apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Image reading and recording apparatus 2 Conveyor belt 3 Original mounting table 4 Photosensitive drum 5 Developing device 6 Short focus lens 7 Charger 8 Transfer discharger 9 Feed roller 10 Tray 11 Document illumination lamp 12 Discharge roller 13 Registration roller 14 Fixing device 21 Drive Rack 22 Drive unit 22a Drive gear 31, 41 Button 32, 42 First link 33, 43 Second link 34, 44 Spring 35 Rack stand 45 Rail A Document placement unit B Image reading and recording unit C Driving means

Claims (4)

[Claims] An image reading / recording unit including a movable document placing unit, a reading unit for reading an image on a document, and a recording unit for recording an image on a sheet; the document placing unit or the image A drive unit provided on one of the reading and recording units and a driven unit provided on the other, and a driving unit for sliding the original placing unit on the image reading and recording unit; The image reading and recording apparatus according to claim 1, wherein said document placement unit is provided with a release unit for said driving unit. 2. The apparatus according to claim 1, wherein said driving section has a driving gear, said driven section has a driving rack, and said releasing means is means for releasing said meshing. Image reading and recording device. 3. The drive gear is provided on the image reading / recording section, the drive rack is provided on the document placing section, and the release means moves the drive rack in a radial direction of the drive gear. 3. The image reading and recording apparatus according to claim 2, wherein the image reading and recording apparatus is means for releasing the engagement. 4. The drive gear is provided on the image reading / recording section, the drive rack is provided on the document placing section, and the release means moves the drive rack in a direction parallel to the axis of the drive gear. 3. The image reading / recording apparatus according to claim 2, wherein the means is a means for releasing the engagement by causing the engagement.