JPH066366Y2 - Image forming device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention can be applied to an electrophotographic copying machine, a printer, or the like.
The present invention relates to an image forming apparatus including a cassette loading unit for inserting and removing a paper feed cassette.

[Conventional technology]

For example, in an electrostatographic copying machine, various electrical components that require adjustment operations, such as a volume for developing bias adjustment and a volume for transfer high voltage, a volume for separation high voltage and shift bias of a separation charger, and other main chargers and It is equipped with a potentiometer for adjusting the voltage of the halogen lamp.

The adjustment operation of these electrical components is, of course, performed at the time of assembling the copier or before shipping, but is often performed at the time of periodic inspection of the apparatus mainly by a service person who has acquired necessary techniques. With the front cover of the copier body open, adjustment operation is performed through the operation opening formed on the front side plate, or the rear cover that is screwed is removed and adjustment operation is performed from the rear side of the copier. I have been smashed.

Above all, each volume for developing bias adjustment, transfer high voltage, separation high voltage, and shift bias is covered with an outer cover together with a high-voltage transformer and the like. In addition to the opening of the front cover, the exterior cover is removed, and the exterior components that hinder the removal of the cover and the interior components that interfere with the adjustment operation are removed.

However, various adjustment operations can be performed with the front cover open, that is, there is a great risk that a user who does not have an adjustment technique will make an adjustment operation by mistake.

In general, in order to ensure safety when the front cover is opened, a switch is provided which disconnects the main electric circuit when the front cover is opened. Therefore, when the front cover is opened, the copying machine is opened. It is not possible to perform adjustment operation of various electrical components while operating, and therefore, for example, when trying to know the adjustment result such as the adjustment of the developing bias and the voltage adjustment of transfer / separation based on the copied image, after the adjustment operation, The inner and outer exterior parts and the outer cover are attached, the front cover is closed, the copier is operated, and there is no choice but to wait until the copier is ready to perform copying, and
It is necessary to repeat the above operation until proper adjustment is made, and the adjusting operation is complicated and troublesome.

Alternatively, when the rear cover is removed and the adjustment operation is performed from the rear side of the copying machine, the above inconvenience does not occur, but it is still troublesome to attach and detach the rear cover, and the rear cover is removed. However, since the drive device relations such as gears and chains are congested and exposed at the portion, the adjustment operation performed by sewing the gaps between them is very dangerous.

The present invention has been made in view of the above situation,
With the extremely rational improvement, there is no risk of the user accidentally adjusting the electrical components, but the serviceman can easily adjust the various electrical components by operating the image forming device such as a copying machine. An object of the present invention is to provide an image forming apparatus that can be performed and has good operability.

[Means for solving problems]

In order to achieve the above object, the present invention provides an image forming apparatus having a cassette loading section for inserting and removing a paper feed cassette and a manual feed stand, in which a mounting wall of the cassette loading section is provided with operation openings for operating electrical components. Therefore, it is characterized in that the electric component adjustment operation can be performed through the operation opening during the copying operation by feeding the paper from the manual feed stand.

[Action]

According to the above characteristic configuration, since the operation opening is covered by the paper feed cassette when the paper feed cassette is loaded in the cassette loading unit, the paper feed cassette is intended for the adjustment operation of the electrical component. Unless the paper cassette is pulled out from the cassette loading section, adjustment operations for various electrical components cannot be performed, and there is no fear that the user will erroneously adjust various electrical components.

Then, by removing the paper feed cassette from the cassette loading section, various electrical components can be easily and safely performed.
In addition, since the electric component adjustment operation can be performed through the operation opening during the copying operation by feeding the paper from the manual feed stand, therefore, for example, the adjustment result of the developing bias adjustment operation or the transfer / separation voltage adjustment operation can be displayed as a copy image. As a result, it is possible to grasp immediately and to repeat the adjustment operation easily and easily.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. FIG. 2 shows an electrostatographic copying machine as an example of an image forming apparatus, and a copying machine main body equipped with a document table 1 and a document retainer 2 corresponding thereto. 3, a main body 5, a developing device 6, a transfer charger 7, a separation charger 8 and a cleaning device 9 are arranged in this order in the rotation direction of the photoconductor 4 around the photoconductor 4. Further, the optical system movable exposure device 10 is arranged in the upper space of the copying machine main body 3, and the paper a in the paper feeding cassette 12 loaded in the cassette loading portion 11 is used.
A sheet feeding and conveying device 13 for feeding the transfer charger 7 to the transfer charger 7,
A sheet discharging and conveying device 15 that conveys the sheet a after transfer / separation to the fixing device 14 and a sheet discharging roller pair 17 that discharges the sheet a after fixing to the tray 16 are further provided to the manual feed tray 18. Paper feeding device 19 for confluently feeding the fed paper to the paper feeding and conveying device 13
Is provided above the cassette loading unit 11, and the transformer unit U is disposed below the paper feeding / conveying device 13 and the transfer / separation chargers 7 and 8 and behind the cassette loading unit 11. Consists of

As shown in FIGS. 1 and 3, the transformer unit U includes a high voltage transformer 20 for developing bias, an adjusting volume 21 for the developing bias, and a high voltage transformer for transfer charger.
22 and the adjusting volume 23 thereof, the high voltage transformer 24 for the separation charger, the adjusting volume 25 thereof and the separation charger shift bias volume 26, and
The printed circuit board 27 is covered with an outer case 28, and the transfer charger 7 and the separation charger 8 are electrically connected to the transfer / separation high-voltage transformers 22 and 24 without a cable.

Then, each volume 21, 23,
25 and 26 are arranged and set so as to correspond to the inner mounting wall 29 of the cassette loading section 11, and the various volumes 21, 23, 25 and 26 are extracted from the paper feeding cassette 12. At the mounting wall 29 of the cassette loading section 11 and the outer case 28, operation openings b ..., C are provided so that the cassette loading section 11 can be adjusted.

The operation openings b, ... Are set so that the cassette loading section 11 and the inside of the apparatus are almost isolated from each other.
Corresponding to each of 3,25,26 is formed to the minimum required size, the other operation opening c is the whole volume
It is formed in one large opening common to 21,23,25,26.

According to the above configuration, unless the paper feed cassette 12 is pulled out from the cassette loading section 11, various volumes 21, 23,
The adjustment operation cannot be performed on 25 and 26. Therefore, generally, the user takes an action such that the user puts his / her hand into the cassette loading section 11 with the sheet feeding cassette 12 pulled out from the cassette loading section 11. It is not an exaggeration to say that there is no such thing, so the user said the various volume 21, 23,
It is possible to reliably prevent accidental operation of 25 and 26.

In addition, the volume can be easily adjusted by inserting a driver through the operation opening b, and safety is guaranteed by minimizing the hole diameter of the operation opening b.

Then, in general, the cassette loading section 11 is provided with a sheet cassette 1.
2 is loaded and the print switch is not operated, the paper feeding roller 31 of the cassette loading unit 11 is not driven. In other words, when the paper feeding cassette 12 is removed from the cassette loading unit 11, printing is mistakenly performed. Since the paper feed roller 31 is not driven even if the switch is operated, the adjusting operation of the various volumes 21, 23, 25, 26 can be performed extremely safely and easily.

Moreover, since it is not necessary to open the front cover at the time of the above adjusting operation and the main switch is not turned off, the above adjusting operation is possible under the operation of the copying machine. It is possible to perform the adjusting operation through the operation opening b during the copying operation by feeding the paper from the manual feed stand 18 in the state where the front cover of the image forming apparatus is closed. So, for example,
The adjustment operation of the developing bias and the voltage adjustment operation of the transfer / separation can be performed at the same time as the copying by feeding the paper through the manual feed stand 18. Therefore, the adjustment operation is adjusted based on the copied image. The result can be immediately grasped, and the adjustment operation can be repeated easily and easily.

FIG. 4 shows another embodiment of the volume operating section. In such a configuration, the operation opening b provided in the mounting wall 29 of the cassette loading unit 11 has substantially the same size as the operation opening c common to all the volumes 21, 23, 25, 26 formed in the outer case 28. A lid that is shaped and opens and closes the operation opening b
33 is pivotally attached to the upper side of the operation opening b, and the lid body is
A biasing member (not shown) such as a spiral spring for opening the 33 and biasing it freely is provided on the pivotally attached portion of the lid 33, and
The lid 33 is configured to be fixed to the mounting wall 29 with a fixing screw d, and is characterized in that adjustment operation can be easily performed through the large operation openings b and c.

In this case, the lid 33 assures the safety, and the lid 33 is opened by the biasing tool only by removing the locking screw d, so that the adjustment operation can be easily performed.

In the case of a large copying machine, the transformer unit U
The cassette loading section 11 and the cassette loading section 11 may be separated from each other, but in such a configuration, the volume 21, 23, 25, 2
6 is separated from the transformer unit U and the volume 2
1,23,25,26 are arranged near the mounting wall 29 at the inner part of the cassette loading part 11 and the mounting wall 30 at the side part (see FIG. 3), and at the same time as the volume 21,23,25,26. Correspondingly, the mounting wall 29,
It is also possible to form a volume operation opening in the volume 30 so that the volume 21, 23, 25, 26 can be adjusted and operated through the operation opening.

Further, in the embodiment, the volumes 21, 23, 25, and 26 are illustrated as the electrical components that require the adjustment operation, but in addition, the voltage adjustment volume of the main charger 5 and the voltage of the halogen lamp 32 of the exposure apparatus 10 are used. The adjustment volume, the fixing temperature control volume, the development toner control volume, the control method change switch, etc. are used as the electrical components for the adjustment operation, and these are mounted on the back mounting wall 29 or the side mounting wall 30 of the cassette loading section 11. It may be arranged in the vicinity, and a volume operation opening may be formed in the mounting walls 29, 30 corresponding to the volume so that the volume can be adjusted and operated through the operation opening.

[Effect of device]

As described above, the present invention provides an image forming apparatus including a cassette loading unit for inserting and removing a paper feed cassette and a manual feed stand, in which an operation opening for operating an electrical component is provided on a mounting wall of the cassette loading unit, The present invention is characterized in that the electronic component adjustment operation can be performed through the operation opening during the copying operation by feeding the paper from the table. Therefore, when the paper feeding cassette is loaded in the cassette loading unit, the operation described above is performed. Since the opening is covered by the paper feeding cassette, unless the paper feeding cassette is pulled out from the cassette loading section for the purpose of adjusting the electric component, the adjusting operation for various electric components cannot be performed. Alternatively, it can be exaggerated to say that the user never takes an action such as putting his or her hand into the cassette loading section with the paper feeding cassette pulled out from the cassette loading section. Since it is not, it can be prevented reliably a situation in which the user operates erroneously the various volumes.

Then, by pulling out the paper feed cassette from the cassette loading section, adjustment operations of various electrical components can be easily and safely performed with a simple labor.

Moreover, since the electrical component adjusting operation can be performed through the operation opening during the copying operation by feeding the paper from the manual feed stand, therefore, for example, the adjustment result of the developing bias adjustment operation or the transfer / separation voltage adjustment operation can be displayed as a copy image. It is possible to grasp immediately based on the base, and it is possible to easily repeat the adjustment operation with a simple effort, and as a whole, a reasonable improvement that effectively utilizes the cassette loading section that is normally closed by the paper feed cassette As a result, the conventional inconveniences mentioned at the beginning can be solved at once.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a cassette loading section and the vicinity of a transformer unit, FIG. 2 is a schematic vertical sectional side view of an electrostatic photocopier of an example of an image forming apparatus, and FIG. 3 is a cassette load of an electrostatic photocopier. It is the side view seen from the part. FIG. 4 is a sectional view of the cassette loading portion and the transformer unit of another embodiment. 11 …… Cassette loading section, 29,30 …… Mounting wall, b …… Operation opening.

Claims (1)

[Scope of utility model registration request] 1. An image forming apparatus provided with a cassette loading section for inserting and removing a paper feed cassette and a manual feed stand, wherein an operation opening for operating electrical components is provided on a mounting wall of the cassette loading section, so that a paper feed from the manual feed stand is provided. An image forming apparatus capable of adjusting an electrical component through the operation opening during a copying operation using paper.