JP2001146326A - Cabinet for electrophotographic image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To miniaturize the whole of a device while considering the handling thereof, to improve the handling of the whole of the device with the simple structure, and to improve the safety. SOLUTION: A cabinet is provided with positioning pins to be fitted to an electrophotographic image forming device main body and a paper feeding device, and each bottom surface of the electrophotographic image forming device main body and the paper feeding device is provided with recessed parts to be fitted on the positioning pins, so that both right side surfaces fit nearly flush with each other to facilitate the setting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electrophotographic image forming apparatus capable of printing a large amount of data.

[0002]

2. Description of the Related Art In general, an electrophotographic image forming apparatus receives print data and develops it into image data.
An image is formed by irradiating the photosensitive member with a light beam such as a laser beam.
On the other hand, a medium such as paper is transported to the photoconductor by a transport unit such as a roller, and an image formed on the photoconductor is transferred. Then, the image is fixed on the paper by the fixing device,
Print (print).

In such an electrophotographic image forming apparatus, a paper feeder containing a paper cassette is mounted on an electrophotographic image forming apparatus as disclosed in Japanese Patent Application Laid-Open Nos. 8-104436 and 10-181901. This is the usual form.

Recently, as the printing speed of the electrophotographic image forming apparatus has been increased, it is necessary to mount a paper feeder containing a paper cassette in order to supply a large amount of sheets to the electrophotographic image forming apparatus. It is necessary to improve the handleability of the entire apparatus by devising the capacity of the paper cassette according to market requirements.

[0005] Further, since the entire apparatus becomes heavier and heavier, a cabinet for mounting these apparatuses is required in order to move the installation place, and it is important to save space. It was becoming.

[0006]

Generally, as the printing speed of an electrophotographic image forming apparatus is increased, a large-capacity paper cassette to be used for the printing is required. It has become necessary to attach paper devices and use them in a multi-tiered stack.The equipment itself becomes large and heavy in weight, so when installing or moving, the entire equipment must be placed in a cabinet. Need to be installed.

In that case, because of the size and weight of the device,
If the entire device is difficult to attach to the cabinet, or if the cabinet shakes during movement, the devices move under the influence of the device, and they are displaced from each other, there has been a danger of falling.

Further, when the front door of the cabinet opens and closes forward, it is necessary to secure a space necessary for opening and closing the front door, which requires an extra space.

As a result, the overall handling is poor, and the electrophotographic image forming apparatus has a problem in terms of paper maintenance.

Therefore, in consideration of the overall handling,
Inexpensive configuration reduces size and size, enhances safety,
It is an issue to provide a cabinet in which an electrophotographic image forming apparatus and a paper feeding apparatus which can be easily operated as a whole can be installed.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an electrophotographic image forming apparatus and an image forming apparatus in which the whole apparatus is reduced in size and size in consideration of the ease of handling, the ease of handling of the entire apparatus is improved with a simple structure, and the safety is enhanced. An object of the present invention is to provide a cabinet for a paper device.

[0012]

In order to achieve the above object, according to the present invention, a cabinet is provided with positioning pins which are fitted to a main body of an electrophotographic image forming apparatus and a paper feeder, and the cabinet is provided with a positioning pin. A recess is provided on the bottom surface of the paper device to which the positioning pin fits, and the right side surfaces are substantially flush with each other to facilitate setting.

A wall is provided on the left side surface of the cabinet, and when the front door is opened and closed, the front door is rotated so as to slide on the inner wall of the wall, so that the front door can be stored inside the wall. It is to have done.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

The printing apparatus main body 25 includes developing units 1 to 4,
The optical unit 5, the charger 8, the photosensitive belt 22, the transfer drum 21, the registration roller 12, the transfer roller 13, the static eliminator 15, the fixing device 19, the paper discharge roller 18, and the paper feed cassette a6 are main components.

The operation of the printing device 25 will be described.

The charger 8 uniformly charges the photosensitive belt 22 in response to a print start signal from a host (not shown). The optical unit 5 draws a latent image on the photosensitive belt 22 based on print data sent from the host. The drawn latent image is developed by any one of the developing units 1 to 4, and the colored particles in the developing unit are applied on the photosensitive belt 22. The photosensitive belt 22 is rotated by a driving source not shown here, and the photosensitive belt 2 is placed on the transfer drum 21.
2. Transfer the colored particles on 2. Excess colored particles remaining on the transfer drum 21 are removed by the drum cleaner 20.

Excessive colored particles remaining on the photosensitive belt 22 are removed by a belt cleaner 23 and charged by the charger 8 again. In the case of color printing, this process is repeated a plurality of times while switching the developing device.

FIG. 7 shows a case where printing is performed by an electrophotographic image forming apparatus. A visible image is formed on a transfer drum 21 by colored particles of a single color or a plurality of colors.
The sheet a27 is pulled out from the sheet cassette a6 by the sheet feeding roller a10 at the time when the desired transfer is completed or in advance, and waits at the registration roller 12. After a predetermined time, the paper feed roller a10 stops.
At a timing when the position of the visible image formed on the transfer drum 21 coincides with the transfer position on the sheet, the sheet waiting at the registration roller 12 starts conveying again, and the transfer roller 13 At this point, the visible image is transferred to the paper side.
The paper is peeled off from the transfer drum 21 by the static eliminator 15,
The fixing device 19 fixes the colored particles on the paper. In the case of printing on only one side, the switch 17 does not operate, and the paper aa4
0 is discharged to the discharge tray 28 side.

The paper feeder b37 contains a paper cassette b7 that stores paper b35. A paper cassette c storing paper c36 is provided in the paper feeding device c38.
34 are stored.

In the case of double-sided printing, the switch 17 is lowered and taken into the non-transfer paper device 26 side, and the paper aaa 39
Is transported by the transport roller a16 and the paper transport guide a14 to the reversing temporary storage section 9 located on the rear side of the printing apparatus main body 25. At this time, the curl applied to the paper a27 on which the first surface is printed is corrected by taking a curved path provided in the reversing temporary storage section 9 in a direction opposite to that of the fixing device 19.

In order to transfer the paper aaa39 to the second surface (back surface), the paper aaa39 is pulled out of the reversing temporary storage section 9 by a driving source not shown here, and the paper transport guide a14 and the transport roller a16, the paper is supplied from the transport roller b11 to the paper supply transport path a29 provided in the printing apparatus main body 25 via the transport path b30 of the paper feeding apparatus b37, and is again returned to the printing apparatus main body 25. It is transported inside. After that, it stands by at the registration roller 12 and
It is held at the position.

At this time, the second surface (back surface) is
The print data on the second side (back side) is
The sheet is sent from the host either during conveyance of the paper on which printing on the first surface (front surface) is completed or after being stored in the reversing temporary storage unit 9, and a visible image is created on the transfer drum 21 in the above-described process. Is done. The position of the visible image formed on the transfer drum 21 is
At a timing coincident with the transfer position on the sheet, the sheet waiting at the registration roller 12 starts conveying again, and the visible image is transferred to the back surface of the sheet at the transfer roller 13. The paper is transferred to the transfer drum 21 by the neutralizer 15.
The colored particles are further peeled off and fixed by the fixing device 19 on the back surface of the paper. The switch 17 is operated so as to discharge the paper to the paper discharge tray 28 side, and the paper aa for which printing on both sides is completed.
40 is discharged onto the paper discharge tray 28.

FIG. 8 shows the printing apparatus main body 25 with an arrow a4.
1, a method of mounting the non-transfer paper device 26, the paper feeding device b37, and the paper feeding device c38 from the directions of the arrows b42 and c43.

In such an apparatus configuration, the paper feeding device c
A concave portion a75 and a concave portion b76 are provided at the bottom of the base. In addition, a concave portion (not shown) is similarly provided on the bottom of the printing device main body 25.

Referring to FIGS. 1, 2, 3 and 4, a printing apparatus main body 25 having a non-transfer paper apparatus 26 mounted thereon and a paper feeding apparatus b
37, a method of attaching the sheet feeding device c38 to the cabinet 51 will be described.

Here, the configuration of the cabinet 51 will be described. The cabinet 51 has a front door a56 to which a handle 55 is attached, and a hinge a61 and a hinge b62.
Can be opened and closed. The upper surface has a slit a52 and a slit b53.

A positioning pin a48 and a positioning pin b49 are provided near the right side a44 of the cabinet 51.
As shown in the enlarged view A77, the positioning pin a48 and the positioning pin b49 are formed in a substantially cylindrical shape. In addition, a caster 50 is provided at the bottom to be movable.

First, the paper feeding device c38 is connected to the cabinet 51.
And the right side surface b45 of the sheet feeding device c38 and the right side surface a44 of the cabinet 51 are substantially flush with each other, and are mounted in the direction of arrow d54. At this time, the concave portion b76 provided at the bottom of the sheet feeding device c38 is fitted with the positioning pin a48, and the concave portion a75 is fitted with the positioning pin b49, so that the mounting can be easily performed.

In this case, the right side surface c46 of the sheet feeding device b37 and the right side surface d47 of the printing device main body 25 are substantially flush with each other, so that overall consistency can be obtained.

Next, in order to fix the sheet feeding device c38 to the cabinet 51 so as not to cause a positional shift, as shown in an enlarged view B58, the front portion is fixed to a fixing plate a57.
Using a slit a52 and a right side surface a44 provided on the upper surface of the cabinet 51, and the rear portion is provided with a fixing plate b5 as shown in an enlarged view C60.
9, using the slit b53 and the left side surface 74 of the cubinet 51, and firmly fixed.

As shown in FIGS. 5 and 6, in the case where the front door b64 is constituted by one part, when the front door b64 is opened and closed in the direction of arrow e63, the front door b64 is turned along the trajectory a71 and the front end is rotated. Opening from the portion 65 to the position of the dimension La69 required extra space.

Therefore, a partition wall 78 is provided inside the left side surface 74 of the cabinet 51, and a front door c66 is provided so as to move along the inner wall 72 of the left side surface 74. Accordingly, when the front door c66 is opened and closed in the direction of the arrow e63, the trajectory b70 is pivoted.
Since it can be opened only from the front end 65 to the position of the dimension Lb67, the space can be saved by the dimension Lc68 as compared with the conventional case.

The inner wall 72 of the left side surface 74 and the partition wall 7
8 and the front door c
66 can be stored, and as a whole,
Space saving can be achieved.

[0035]

According to the present invention, in the electrophotographic image forming apparatus, it is possible to reduce the size and size of the entire apparatus in consideration of the handling, and to improve the handling of the entire apparatus with a simple configuration. In addition, the electrophotographic image forming apparatus and paper feeder can be easily and accurately set in the cabinet, and can be easily transported and arranged to various places, and the front door can be opened and closed without taking up space. It can be easily performed, can be handled with enhanced safety, and can save space.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating a method of mounting a sheet feeding device according to an embodiment of the present invention on a cabinet.

FIG. 2 is a front perspective view showing a method of fixing a printing device and a paper feeding device to a cabinet according to an embodiment of the present invention.

FIG. 3 is a rear perspective view illustrating a method of fixing a printing apparatus and a sheet feeding apparatus to a cabinet according to an embodiment of the present invention.

FIG. 4 is a perspective view showing one embodiment of the present invention, in which a printing device and a paper feeding device are mounted on a cabinet, and how a front door of the cabinet is opened and closed.

FIG. 5 is a perspective view illustrating opening and closing when a front cover of a cabinet is formed of one sheet in a conventional example.

FIG. 6 is a cross-sectional view of a main part of a plan view of a cabinet illustrating a method of opening and closing with a minimum opening and closing area in a cabinet having a single front cover according to an embodiment of the present invention.

FIG. 7 is a cross-sectional view of a printing apparatus and a sheet feeding apparatus according to an embodiment of the present invention.

FIG. 8 is a cross-sectional view illustrating a method of attaching a non-transfer paper device and a paper feeding device to a printing device according to an embodiment of the present invention.

[Explanation of symbols]

REFERENCE SIGNS LIST 1 developing device 1, 2 developing device 2, 3 developing device 3, 4 developing device 4, 5 developing device 4, 5 optical unit 6, paper feed cassette a, 7… paper cassette b, 8… charging device 9 Temporary storage unit, 10
... Supply rollers a, 11 ... Transport rollers b, 12 ... Registration rollers, 13 ... Transfer rollers, 14 ... Paper transport guide a
15: static eliminator, 16: transport roller a, 17: switch, 1
DESCRIPTION OF SYMBOLS 8 ... Discharge roller, 19 ... Fixing device, 20 ... Drum cleaner, 21 ... Transfer drum, 22 ... Photosensitive belt, 23 ... Belt cleaner, 25 ... Printing device main body, 26 ... Reverse transfer paper device, 27 ... Paper a, 28 .., A paper discharge tray, 29, a paper supply conveyance path a, 30, a conveyance path b, 34, a paper cassette c, 35, paper b, 36, paper c, 37,
38: paper feeding device c, 39: paper aaa39, 40 ... paper aa41: arrow a, 42 ... arrow b, 43 ... arrow c, 44
... right side a, 45 ... right side b, 46 ... right side c, 47 ...
Right side d, 48: Positioning pin a, 49: Positioning pin b, 50: Caster, 51: Cabinet, 52: Slit a, 53: Slit b, 54: Arrow d, 55: Handle, 56: Front door a, 57 ... fixed plates a, 58 ... enlarged views B, 59 ... fixed plates b, 60 ... enlarged views C, 61 ... hinges a, 62 ... hinges b, 63 ... arrows e,
64 Front door b, 65 Front end, 66 Front door c, 67 Dimension Lb, 68 Dimension Lc, 69
Dimensions La, 70 Locus b, 71 Locus a, 72 Inner wall, 73 Space a, 74 Left side, 75 Depression a7
5, 76 ... concave part b, 77 ... enlarged view A, 78 ... partition wall.

Continuation of the front page F term (reference) 3F343 FA02 FB02 HA27 HB03 HC04 HC25 KB03 KB13

Claims (7)

[Claims] A main body comprising a paper cassette for storing paper, a transfer body on which an image is formed, a conveying means for conveying the paper to the transfer body, and a fixing device for fixing a transferred image of the paper; In an electrophotographic image forming apparatus having a cabinet configured to stack paper feeders accommodating paper cassettes in multiple stages, positioning pins for fitting the main body are provided in the cabinet. apparatus. 2. The positioning pin according to claim 1,
An electrophotographic image forming apparatus, which is provided at two places on the right side when viewed from the front of the cabinet. 3. An electrophotographic image forming apparatus according to claim 1, wherein a concave portion for fitting said positioning pin is provided on a bottom surface of said electrophotographic image forming apparatus and said sheet feeding device. 4. The apparatus according to claim 1, wherein the main body, the sheet feeding device, and the cabinet have substantially the same size in the width direction, and the cabinet has its right side substantially flush with each other. An electrophotographic image forming apparatus characterized by being easily fitted. 5. An electrophotographic image forming apparatus according to claim 1, wherein two fixing plates are provided for fixing the sheet feeding device and the cabinet. 6. The fixing plate according to claim 5, wherein:
An electrophotographic image forming apparatus, wherein the right side is located on the near side and the left side is located on the rear side when viewed from the front of the cabinet. 7. A cabinet according to claim 1, wherein a wall is provided on a left side surface of the cabinet, and when the front door is opened and closed, the front door is rotated so as to slide on an inner wall of the wall, and the front door is provided inside the wall. So that the door can be stored,
An electrophotographic image forming apparatus, wherein an opening / closing area of a front door with respect to the front is minimized.