JP6160328B2 - Image forming apparatus - Google Patents

Description

  The present invention relates to an image forming apparatus including a plurality of image forming units that respectively form toner images of different colors.

  An image forming apparatus that forms a color toner image on a recording sheet (hereinafter referred to as “color image forming apparatus”) usually includes an image forming unit that forms toner images of yellow, magenta, cyan, and black. An image forming mechanism is provided. Each image forming unit is provided with a photosensitive drum in a horizontal state, and a toner image is formed on the photosensitive drum.

  As an image forming mechanism for forming a color toner image, a so-called tandem type is mainly used. In the tandem-type image forming mechanism, each of the image forming units is configured so that the axial direction of the photosensitive drum is in a state along the depth direction of the image forming mechanism, and in the apparatus width direction (a direction orthogonal to the depth direction). Arranged side by side. Further, the image forming mechanism is provided with a rotating transfer belt that travels along the horizontal direction, and each image forming unit faces a traveling portion of the transfer belt along the horizontal direction. Be placed. The toner image formed on the photosensitive drum of each image forming unit is primarily transferred to a transfer belt, and then secondarily transferred to a recording sheet and fixed.

  A color image forming apparatus having such a tandem type image forming mechanism may be provided with an image reading device (image reading mechanism) for reading an image of a document. An image forming apparatus provided with an image reading mechanism is disclosed in Patent Documents 1 and 2, for example. In Patent Documents 1 and 2, an image reading mechanism is provided on an image forming mechanism that forms a monochrome toner image. However, even in a color image forming apparatus, an image reading mechanism is usually provided on the image forming mechanism.

JP 2007-336208 A Japanese Patent Laid-Open No. 02-040666

  In recent years, there has been an increasing demand for installing a color image forming apparatus on a floor such as a store so that many users can use it. When the color image forming apparatus is installed on the floor of a store or the like, it is desirable that the depth dimension is as small as possible so as not to disturb the display of merchandise and to prevent the passage of customers. However, in the conventional tandem type image forming mechanism in which a plurality of image forming units are arranged side by side in the apparatus width direction, since the photosensitive drum of the image forming unit is arranged along the depth direction, color image formation is performed. There is a limit to reducing the depth dimension of the device.

In order to reduce the depth dimension of the color image forming apparatus, an image forming mechanism having a configuration in which a plurality of image forming units in which the axial direction of each photosensitive drum is in the state of the apparatus width direction are arranged side by side in the vertical direction Has been proposed. With such a configuration, the depth dimension of the color image forming apparatus is reduced, which is suitable for installation on a floor such as a store.
However, in this case, the height of the image forming mechanism is higher than that of the conventional tandem type image forming mechanism. For this reason, when the image reading mechanism is provided on the image forming mechanism as in the conventional color image forming apparatus, the position of the image reading mechanism becomes high. In the image reading mechanism, since the user needs to set a document, take out a document from which an image has been read, and the like, if the position of the image reading mechanism increases, the operability of the user, such as setting a document, decreases. It will be.

  The present invention has been made in view of such problems, and an object of the present invention is to provide a configuration having a plurality of image forming units and an image reading mechanism with a small depth dimension and to perform operations such as setting a document on the image reading mechanism. An object of the present invention is to provide an image forming apparatus having excellent properties.

In order to achieve the above object, an image forming apparatus according to the present invention includes a plurality of image forming units, each of which forms a toner image of a different color, arranged in the vertical direction, and is formed by each image forming unit. An image forming mechanism for transferring and fixing the toner image onto a sheet and an image reading mechanism for reading an image of a document. The image reading mechanism is viewed from the front side and the upper side of the apparatus. Arranged so as to be positioned between a vertical surface including a portion located closest to the back side of the apparatus in the image forming mechanism and a vertical surface including a portion located closest to the front side of the apparatus without overlapping the image forming mechanism. are, a platen on which a document is set in a state in which the top is inclined so as to be positioned on the front side of the apparatus with respect to the vertical direction, aligned in the longitudinal direction relative to the platen A document discharge table, a document set on the document table, a document transfer means for transferring the document set along the document table to the back side of the apparatus, and then transferred to the document discharge table; The toner image formed by each of the plurality of image forming units is transferred on the image reading unit that reads the image of the original, the plurality of image forming units, and the front side of the plurality of image forming units. And an intermediate transfer belt disposed along the vertical direction, and a transfer member that transfers the toner image transferred to the intermediate transfer belt onto a sheet below the intermediate transfer belt; A fixing unit for fixing the toner image transferred onto the sheet on the front side of the apparatus with respect to the transfer member, and the image from below the image forming unit. It characterized by having a a sheet feeding unit for supplying a sheet for forming part.

  In the image forming apparatus of the present invention, since the plurality of image forming units are arranged in the vertical direction, the depth dimension of the image forming mechanism is made smaller than the depth dimension of the conventional tandem type image forming mechanism. Can do. In addition, the image reading mechanism is disposed in a region of a depth dimension of the image forming mechanism in a region lateral to the image forming mechanism as viewed from the front side of the apparatus. As a result, the entire depth dimension of the image forming apparatus of the present invention can be made smaller than the depth dimension of an image forming apparatus having a conventional tandem type image forming mechanism.

  Furthermore, since the image reading mechanism is disposed on the side of the image forming mechanism when viewed from the front side of the apparatus, the image reading mechanism can be set to an arbitrary height regardless of the height of the image forming mechanism. Therefore, the image reading mechanism can be installed at a height at which the user can easily perform operations such as document setting and document extraction. Thereby, it is possible to prevent the operability of the image reading mechanism from being lowered.

Preferably, a sheet discharge path for conveying the sheet on which the toner image is fixed in the fixing unit to an upper sheet discharge port is provided on the front side of the intermediate transfer belt.
Preferably, the image forming mechanism further includes a sheet storage portion that stores the sheet in a state along the vertical direction so that an upper portion of the sheet discharged from the sheet discharge path protrudes from the sheet discharge port. It is characterized by.

  Preferably, when the image reading mechanism reads the image of the document set on the document table in the page order by the image reading unit, the document is stacked on the document discharge table in the page order, and the image forming mechanism A toner image based on the image data of each page of a plurality of documents read in page order by the image reading unit is sequentially formed on a plurality of sheets, and the plurality of sheets are arranged in page order in the sheet storage unit. It is characterized by being stacked in a state.

Preferably, each of the plurality of image forming units is provided with a rotatable photosensitive member in a horizontal state in which a rotation axis direction is perpendicular to a sheet conveyance direction, The reading mechanism is arranged on the front side of the apparatus in a region adjacent to the plurality of image forming units in the rotation axis direction of the photosensitive member.
Preferably, the image reading mechanism is arranged so that a document set on the document table and a sheet accommodated in the sheet accommodating portion of the image forming mechanism are at the same height position. Features.

Preferably, a display panel is provided above the sheet discharge port.
Preferably, the image forming unit further includes a plurality of toner replenishing containers storing toner replenished in each of the plurality of image forming units, and the plurality of toner replenishing containers are provided on the rear side of the display panel. It is characterized by.

Preferably, the image forming apparatus further includes a plurality of toner replenishing containers that store toner replenished in the plurality of image forming units, and the plurality of toner replenishing containers are provided on the rear side of the image reading mechanism. It is characterized by that.
Preferably, a display panel is provided above the image reading mechanism in a state where the display surface is directed to the front side of the apparatus.

Preferably, the image forming unit further includes a plurality of toner supply containers storing toner to be supplied to each of the plurality of image forming units, and the plurality of toner supply containers are provided in a region located above the image forming unit. It is characterized by being.
Preferably, the image forming unit, the fixing unit, and the sheet supply unit can be pulled out to the front side of the apparatus.

  Preferably, the sheet discharge path can be opened to the front side of the apparatus.

1 is a schematic perspective view showing an external appearance of an image forming apparatus according to an embodiment of the present invention. FIG. 2 is a schematic front view of the image forming apparatus illustrated in FIG. 1. It is a schematic diagram for demonstrating the structure of the cross section along the DD line | wire in FIG. It is a schematic diagram for demonstrating the structure of the cross section along the EE line in FIG. FIG. 2 is a schematic diagram illustrating an enlarged vertical section of a main part of an image forming mechanism housed in the image forming apparatus illustrated in FIG. 1. FIG. 2 is an enlarged view of a longitudinal section of an image reading mechanism provided in the image forming apparatus shown in FIG. 1. FIG. 6 is a schematic front view of an image forming apparatus according to another embodiment of the present invention. It is a schematic diagram for demonstrating the structure of the cross section along the DD line in FIG. FIG. 10 is a schematic front view of an image forming apparatus according to still another embodiment of the present invention. FIG. 10 is a schematic front view of an image forming apparatus according to still another embodiment of the present invention.

Embodiments of the present invention will be described below.
[Embodiment 1]
FIG. 1 is a schematic perspective view showing an appearance of an image forming apparatus according to Embodiment 1 of the present invention, and FIG. 2 is a schematic front view of the image forming apparatus.
As shown in FIGS. 1 and 2, the image forming apparatus according to the present embodiment includes a housing 10 provided on a rectangular bottom plate 71, and a display panel 61 is provided on the front surface of the upper portion of the housing 10. It has been.

In the following, the front side of the housing 10 on which the display panel 61 is provided is referred to as “device front”, and the opposite side is referred to as “device back”. Further, the direction in the housing 10 from the device front side to the device back side is referred to as “front-rear direction”, and the left side and right side from the device front side to the device back side are respectively referred to as “device left side” and “device right side”. .
3 is a schematic diagram for explaining a configuration of a cross section along the line DD in FIG. 2, and FIG. 4 is a schematic diagram for explaining a configuration of a cross section along the line EE in FIG. is there.

As shown in FIGS. 1 to 3, an image forming mechanism 2 that forms a color toner image on a recording sheet and prints it out is housed in a lower portion of the housing 10 on the left side of the apparatus.
As shown in FIGS. 1 and 2, the display panel 61 is disposed on the upper portion of the housing 10 on the left side of the device on the front side of the device. The display panel 61 is exposed from the upper part of the housing 10 to the front side of the apparatus. Further, an image reading mechanism 40 that reads an image of a document set by a user and acquires image data corresponding to the image of the document is arranged on the front side of the apparatus on the right side of the apparatus in the housing 10. The image data acquired by the image reading mechanism 40 is transmitted to the image forming mechanism 2 and printed out by the image forming mechanism 2.

As shown in FIG. 1, the housing 10 has a vertically long rectangular parallelepiped shape with a relatively short depth dimension (front-rear dimension) and a relatively long vertical dimension (height).
With the exception of the lower part on the left side of the apparatus, the housing 10 has a constant depth dimension, a width direction (horizontal direction orthogonal to the front-rear direction, hereinafter referred to as “apparatus width direction”), and a vertical dimension. Yes. The lower part on the left side of the apparatus in the housing 10 is a main body accommodating portion 11 having a depth dimension that is approximately 50 mm longer than other portions. As will be described later, the image forming mechanism 2 is accommodated in the main body accommodating portion 11.

The height of the housing 10 is longer than the dimension (about 800 mm) in the apparatus width direction and is about 1200 mm. Further, the depth dimension excluding the main body accommodating portion 11 is shorter than the dimension in the apparatus width direction and is about 350 mm.
A side surface portion (hereinafter referred to as “front side surface 12”) located on the right side of the apparatus in the housing 10 is in a vertical state over the entire area from the bottom plate 71 to the upper surface 13 of the housing 10. The upper part of the front side surface 12 extends toward the left side of the apparatus so as to cover the upper part of the left side of the apparatus of the housing 10. Hereinafter, the upper part of the front side surface 12 on the left side of the apparatus is referred to as a “front side left upper part 12a”.

  An upper front door 15 is attached to the lower side of the front upper left portion 12a by a hinge mechanism (not shown) so as to be rotatable in the front side direction (forward) of the apparatus. The lower side edge of the upper front door 15 is close to the main body accommodating portion 11. When the upper front door 15 is rotated forward as indicated by a two-dot chain line in FIG. 1, the lower part of the front side left upper portion 12a is opened forward. A display panel 61 is integrally attached to the upper front door 15.

The display panel 61 is constituted by, for example, a touch panel type liquid crystal display panel. The display panel 61 is exposed from the upper front door 15 in a state in which a display surface 61a that can be touched by the user is directed forward. Therefore, when the upper front door 15 is rotated forward, the display panel 61 is also rotated integrally with the upper front door 15.
The display panel 61 functions as an input / output unit of an information processing unit (not shown) including a CPU, a storage device, a wireless LAN device for connecting to the Internet via wireless communication, and the like. The information processing unit performs processing such as a user accessing an external server, a dedicated site, and the like based on an instruction by touch operation on the display surface 61a, acquiring content requested by the user, and displaying the content on the display panel 61. Run.

  When the user desires to print out the image displayed on the display panel 61, print out the image data acquired by the image reading mechanism 40, or the like, the information processing unit informs that effect by touching the display surface 61a. Can be directed to. In response to this instruction, the information processing unit instructs the image forming mechanism 2 to form a predetermined image on the recording sheet S and print it out.

The display surface 61 a of the display panel 61 has such a height that it is easy for a user standing in front of the housing 10 to see. In addition, since the display surface 61a is arranged at such a height, the user can easily perform a touch operation on the display surface 61a.
An IC card reader 81, a speaker 82, a microphone 83, and a barcode reader 84 are provided on the upper left side 12a of the front side surface in order from the left side of the apparatus at a position above the display panel 61. In addition, a camera 85 is provided at a central position in the apparatus width direction at the upper part of the upper left side 12a of the front side surface, and a lamp 86 is further provided on the upper side thereof.

The camera 85 is provided for photographing a user who operates the image forming apparatus and acquiring the photographing data. The photographing data is used for authentication when, for example, face authentication is performed on the user. The lamp 86 is used as illumination for illuminating the user during shooting.
The speaker 82 is in a state where the acoustic radiation surface is directed forward, and outputs a voice message for explaining to the user how to operate various functions (face authentication, voice recognition, printout, etc.) that can be executed.

The microphone 83 is provided for the user to input voice when performing user authentication based on the user's voice.
Each of the IC card reader 81 and the barcode reader 86 is used for user authentication based on the user identification information. The IC card reader 81 is provided for reading the authentication information of the IC card in which the user authentication information is stored. The barcode reader 86 is provided, for example, for reading a barcode in which user identification information is written.

Such an IC card reader 81, speaker 82, microphone 83, barcode reader 84, camera 85, and lamp 86 can be easily operated by a user located in front of the housing 10.
Note that each of the IC card reader 81, the speaker 82, the microphone 83, the barcode reader 84, the camera 85, and the lamp 86 may be configured to be used for an application different from the above-described applications.

  As shown in FIGS. 1 and 2, a lower front door 11 a is provided on the apparatus front side of the main body accommodating portion 11 in the housing 10. The lower front door 11a covers the front side portion of the apparatus excluding the lower portion of the main body housing portion 11 in a vertical state. The lower side edge of the lower front door 11a is located above the bottom plate 71 by a certain height. Between the lower front door 11 a and the bottom plate 71, a side surface 31 c located on the front side of the apparatus of a sheet feeding unit (sheet supply unit) 31 described later is exposed.

  The side edge of the lower front door 11a on the right side of the device is attached to the side surface of the main body housing 11 on the right side of the device so as to be rotatable by a hinge mechanism (not shown). Therefore, the lower front door 11a can be rotated forward about the side edge on the right side of the apparatus, and when the lower front door 11a is rotated forward, as shown by a two-dot chain line in FIG. The inside except the lower part of the part 11 is opened forward.

As shown in FIGS. 1 and 3, the upper surface of the main body accommodating portion 11 (hereinafter referred to as “accommodating portion upper surface 11 b”) is provided below the upper front door 15 and is integrated with the lower front door 11 a. It is configured. Therefore, when the lower front door 11a is rotated forward, the housing upper surface 11b is also rotated integrally with the front.
A paper discharge port (sheet discharge port) 11c through which the recording sheet S on which the toner image is formed by the image forming mechanism 2 is printed is provided on the storage unit upper surface 11b. As shown in FIG. 1, the paper discharge port 11c is formed in a rectangular shape that is elongated along the apparatus width direction, and is open upward.

As shown in FIG. 3, an image forming unit 20, a paper feeding unit 31, a fixing unit 32, and the like that constitute the main part of the image forming mechanism 2 are housed inside the main body housing unit 11.
The paper feed unit 31 is disposed on the lowermost side of the housing 10. The image forming unit 20 is disposed above the paper feeding unit 31 and on the back side of the apparatus inside the main body housing unit 11. The fixing unit 32 is disposed on the front side of the apparatus in the lower part of the image forming unit 20. A toner replenishing mechanism 50 is provided on the upper left side of the apparatus in the housing 10. The toner replenishing mechanism 50 is disposed on the rear side of the display panel 61 and replenishes the image forming unit 20 with toner.

  The paper feeding unit 31 conveys the recording sheet S to the image forming unit 20. The image forming unit 20 forms a color or monochrome toner image, transfers the toner image to the recording sheet S conveyed from the paper feeding unit 31, and conveys it to the fixing unit 32. The fixing unit 32 heat-fixes the toner image on the recording sheet S by heating and pressurizing the recording sheet S on which the toner image is transferred. The recording sheet S on which the toner image is fixed in the fixing unit 32 is conveyed to a paper discharge port 11c provided on the upper surface 11b of the storage unit.

  FIG. 5 is a schematic diagram showing an enlarged vertical section of the image forming mechanism 2 accommodated in the main body accommodating portion 11 of the housing 10. As shown in FIG. 5, the image forming unit 20 of the image forming mechanism 2 includes four image forming units 23Y, 23M, 23C, and 23K that form different color toner images. The four image forming units 23 </ b> Y, 23 </ b> M, 23 </ b> C, and 23 </ b> K are arranged side by side in the vertical direction at a position closer to the rear side of the apparatus in the main body accommodating portion 11 of the housing 10.

  In the present embodiment, the image forming unit 23Y is positioned on the uppermost side, and the image forming units 23M, 23C, and 23K are arranged in that order on the lower side. Each of the image forming units 23Y, 23M, 23C, and 23K forms a toner image of each color of yellow (Y), magenta (M), cyan (C), and black (K) by a known electrophotographic process.

  On the front side of the image forming units 23Y, 23M, 23C, and 23K, an intermediate transfer belt 21a to which a toner image formed in each image forming unit is transferred is provided along the vertical direction. The intermediate transfer belt 21a includes a lower front door 11a of the main body housing portion 11 that is the most front side portion of the housing 10 and a side surface (hereinafter referred to as "back surface 14") of the back side of the device that is the most back side portion of the housing 10. It is arranged almost in the middle.

The lower part and the upper part of the intermediate transfer belt 21a are respectively wound around a driving roller 21b and a driven roller 21c. Each of the driving roller 21b and the driven roller 21c is rotatably arranged in a horizontal state along the apparatus width direction.
The intermediate transfer belt 21a rotates (rotates) in the direction indicated by Z1 in FIG. 5 when the driving roller 21b is rotationally driven. Accordingly, the width direction of the intermediate transfer belt 21a (the direction orthogonal to the circumferential movement direction) is in a state along the apparatus width direction. When the intermediate transfer belt 21a moves around, a portion of the intermediate transfer belt 21a located on the back side of the apparatus travels in a vertical state from the upper side to the lower side.

  Each of the image forming units 23Y, 23M, 23C, and 23K is provided with a photosensitive drum 23a that is disposed so as to face a running portion on the back side of the apparatus in the intermediate transfer belt 21a. Each of the photosensitive drums 23a is rotatably arranged in a state where the axial direction (rotating axis direction) is horizontal along the apparatus width direction. The photosensitive drum 23a is rotated in the direction indicated by the arrow Z2 so that the portion facing the intermediate transfer belt 21a moves in the same direction as the traveling direction of the intermediate transfer belt 21a.

The image forming units 23Y, 23M, 23C, and 23K have substantially the same configuration except that only the color of toner for forming a toner image is different. For this reason, only the configuration of the image forming unit 23Y disposed at the top is described in detail, and the detailed description of the configurations of the other image forming units 23M, 23C, and 23K is omitted.
The image forming unit 23Y is provided with a charger 23b facing the lower part of the photosensitive drum 23a on the back side of the apparatus. The charger 23b uniformly charges the surface of the rotating photosensitive drum 23a.

  On the back side of each image forming unit 23Y, 23M, 23C, and 23K, an exposure unit 24 that irradiates the charged surface of each photosensitive drum 23a with laser beams Ly, Lm, Lc, and Lk is provided. . The exposure unit 24 applies laser beams Ly, Lm, Lc, and Lk modulated in accordance with image data to the surface of the photosensitive drum 23a that is rotated in each of the image forming units 23Y, 23M, 23C, and 23K. Irradiate. As a result, an electrostatic latent image corresponding to the image data is formed on the surface of the photosensitive drum 23a.

The image forming unit 23Y is provided with a developing unit 23d that is arranged to face the downstream side in the rotation direction with respect to the irradiation position of the laser beam Ly on the photosensitive drum 23a. The developing unit 23d develops the electrostatic latent image formed on the surface of the photosensitive drum 23a with Y color toner. As a result, a Y-color toner image is formed on the surface of the photosensitive drum 23a.
Primary transfer rollers 26Y, 26M, 26C, and 26K are provided on the inner side of the circumferential movement area of the intermediate transfer belt 21a along the running portion of the intermediate transfer belt 21a on the back side of the apparatus. The primary transfer rollers 26Y, 26M, 26C, and 26K are disposed to face the respective photosensitive drums 23a of the image forming units 23Y, 23M, 23C, and 23K with the intermediate transfer belt 21a interposed therebetween.

  When the toner images formed on the photosensitive drums 23a of the image forming units 23Y, 23M, 23C, and 23K are primarily transferred to the intermediate transfer belt 21a on the primary transfer rollers 26Y, 26M, 26C, and 26K, respectively. In addition, a transfer bias voltage is applied. As a result, an electric field is formed between the primary transfer rollers 26Y, 26M, 26C, and 26K and the corresponding photosensitive drums 23a, and the toner images formed on the photosensitive drums 23a are intermediately transferred. Primary transfer is performed on the belt 21a.

  When a full color toner image is formed in the image forming unit 20, the image forming operation timing of each of the image forming units 23Y, 23M, 23C, and 23K is shifted. As a result, the respective toner images formed on the surface of each photosensitive drum 23a are transferred so as to overlap the same area on the intermediate transfer belt 21a. As a result, a full-color toner image is formed on the intermediate transfer belt 21a.

On the other hand, when a monochrome image is formed in the image forming unit 20, only one selected image forming unit (for example, the image forming unit 23K for K toner) is driven. As a result, a toner image is formed on the photosensitive drum 23a provided in the image forming unit, and is transferred onto a predetermined area of the intermediate transfer belt 21a.
Each of the image forming units 23Y, 23M, 23C, and 23K is provided with a cleaning unit 23f that cleans the surface of the photosensitive drum 23a after the toner image is transferred to the intermediate transfer belt 21a. The cleaning unit 23f removes toner and the like remaining on the photosensitive drum 23a.

Each of the developing units 23d of the image forming units 23Y, 23M, 23C, and 23K is supplied from a toner replenishing mechanism 50 (see FIG. 2) provided above the main body accommodating portion 11 to each of Y, M, C, and K. Toner is replenished.
As shown in FIG. 3, the toner replenishing mechanism 50 includes toner bottles 51Y, 51M, 51C, and 51K that store Y, M, C, and K toners, respectively. Each of the toner bottles 51Y, 51M, 51C, and 51K is formed in a cylindrical shape, and is arranged in a line along the vertical direction in a state where each of the toner bottles 51Y, 51M, 51C, and 51K is horizontal along the apparatus width direction.

In the present embodiment, the toner bottle 51Y is arranged at the top, and the toner bottles 51M, 51C, 51K are arranged in that order on the lower side.
Each of the toner bottles 51Y, 51M, 51C, and 51K is detachable from the housing 10 and can be rotated by being attached to the housing 10. In this state, when the toner bottles 51Y, 51M, 51C, and 51K are rotated, the Y, M, C, and K toners stored therein are conveyed in the horizontal direction.

  A toner supply pipe (not shown) is provided at each downstream end of the toner bottles 51Y, 51M, 51C, 51K in the toner transport direction. The toner conveyed in the horizontal direction through the toner bottles 51Y, 51M, 51C, and 51K is supplied to the developing units 23d of the image forming units 23Y, 23M, 23C, and 23K through a toner supply pipe.

Each of the toner bottles 51Y, 51M, 51C, and 51K is in a replaceable state when the upper left portion of the apparatus in the housing 10 is opened forward by the forward rotation of the upper front door 15. Therefore, in this state, each of the toner bottles 51Y, 51M, 51C, 51K is replaced.
As shown in FIG. 5, the secondary transfer roller 27 is in pressure contact with the portion of the intermediate transfer belt 21a that is wound around the lower drive roller 21b. A transfer nip Nt through which the recording sheet S conveyed from the paper supply unit 31 provided below the image forming unit 20 passes is formed at the pressure contact portion between the secondary transfer roller 27 and the intermediate transfer belt 21a. .

As shown in FIG. 3, the paper feed unit 31 includes a paper feed cassette 31 a that can store a plurality of recording sheets S, and a paper feed member 31 b disposed on the back side of the apparatus of the paper feed cassette 31 a. . In the sheet feeding cassette 31a, the recording sheet S is accommodated in a state where the longitudinal direction or the width direction (direction orthogonal to the longitudinal direction) is along the apparatus width direction.
The paper feed member 31b feeds the recording sheets S stored in the paper feed cassette 31a one by one from the paper feed cassette 31a upward on the back side of the apparatus.

  A sheet conveyance path 34 for conveying the recording sheet S fed from the sheet feeding cassette 31a toward the transfer nip Nt is provided on the back side of the apparatus in the main body accommodating portion 11 of the housing 10. The sheet conveyance path 34 conveys the recording sheet S fed from the sheet feeding cassette 31a upward in the vertical state along the back surface 14 of the housing 10, and then conveys the recording sheet S forward toward the transfer nip Nt.

The sheet feeding unit 31 is configured to be able to be pulled forward with respect to the main body housing unit 11 of the housing 10. As shown in FIGS. 1 and 2, the side surface 31 c on the front side of the apparatus in the paper feeding unit 31 is located in front of the lower part of the main body housing portion 11 of the housing 10 when the paper feeding portion 31 is not pulled out from the main body housing portion 11. It is located in the same plane as the door 11a.
As shown in FIG. 5, a timing roller pair 34 a is provided in the sheet conveyance path 34 on the upstream side of the secondary transfer roller 27 in the conveyance direction of the recording sheet S. The timing roller pair 34a conveys the recording sheet S conveyed on the sheet conveyance path 34 to the transfer nip Nt at a predetermined timing.

  The recording sheet S conveyed to the transfer nip Nt passes through the transfer nip Nt while being in contact with the toner image formed on the outer peripheral surface of the intermediate transfer belt 21a that circulates. The toner image on the intermediate transfer belt 21a is transferred to the recording sheet S by the action of an electric field formed by the secondary transfer roller 27 to which a transfer bias voltage is applied while the recording sheet S passes through the transfer nip Nt. Transcribed.

A belt cleaning member 25 is provided on a portion of the intermediate transfer belt 21a that is wound around the upper driven roller 21c. The belt cleaning member 25 removes toner (residual toner) remaining on the intermediate transfer belt 21a after the toner image is secondarily transferred to the recording sheet S.
The image forming unit 20 accommodated in the main body accommodating unit 11 of the housing 10 includes an intermediate transfer belt 21a, a driving roller 21b and a driven roller 21c, image forming units 23Y, 23M, 23C, and 23K, an exposure unit 24, Primary transfer rollers 26Y, 26M, 26C, and 26K and a secondary transfer roller 27 are provided. Such an image forming unit 20 is configured to be integrally pulled out from the main body housing unit 11.

  The fixing unit 32 is provided on the front side of the secondary transfer roller 27. The recording sheet S on which the toner image is secondarily transferred at the transfer nip Nt is conveyed to the fixing unit 32 with the surface onto which the toner image is transferred facing upward. When the toner image of the conveyed recording sheet S is fixed to the recording sheet S, the fixing unit 32 conveys the recording sheet S toward the upper front side. The fixing unit 32 is configured to be able to be pulled forward from the main body housing unit 11 of the housing 10.

A paper discharge path 35 is provided on the front side of the apparatus with respect to the fixing unit 32. The paper discharge path 35 is formed along the lower front door 11 a provided in the main body accommodating portion 11 of the housing 10. The upper end portion of the sheet discharge path 35 reaches a stocker (sheet accommodation portion) 36 disposed below the accommodation portion upper surface 11 b in the main body accommodation portion 11.
A guide roller 35 a that guides the recording sheet S upward is provided in the paper discharge path 35 in front of the upper portion of the fixing unit 32. In the paper discharge path 35, two pairs of transport rollers 35b and 35c are provided between the guide roller 35a and the stocker 36 with an appropriate interval in the vertical direction. Further, at the upper end of the paper discharge path 35, a set of paper discharge driving rollers 35d and a paper discharge driven roller 35e for supplying the recording sheet S into the stocker 36 are provided.

  The paper discharge driven roller 35e is disposed on the front side of the apparatus of the stocker 36, and the paper discharge driving roller 35d is in pressure contact with the apparatus front side portion of the paper discharge driven roller 35e. The paper discharge driving roller 35d is driven to rotate in the direction indicated by the arrow Z3 in FIG. 5, and the paper discharge driven roller 35e follows the rotation of the paper discharge driving roller 35d in the direction indicated by the arrow Z4. It is rotated.

The stocker 36 is configured in a hollow box shape opened upward from the paper discharge port 11c. The stocker 36 has a back-side guide plate 36a disposed in a state along the vertical direction on the apparatus back side of the paper discharge driven roller 35e. The upper side edge of the back side guide plate 36a forms the side edge on the back side of the apparatus at the paper discharge port 11c.
The height of the lower side edge of the back side guide plate 36a is positioned below the discharge driven roller 35e. The back side guide plate 36a is in a vertical state except for the upper part, and the upper side of the back side guide plate 36a is inclined at a relatively small angle toward the back side of the apparatus.

A bottom plate 36b is provided on the lower side edge of the back side guide plate 36a. The bottom plate 36b extends in a horizontal state toward the apparatus front side of the back side guide plate 36a so as to face the paper discharge port 11c. The side edge of the bottom plate 36b on the front side of the apparatus is located below the discharge driven roller 35e.
A front-side guide plate 36c that extends upward in a vertical state is provided on the side edge of the bottom plate 36b on the front side of the apparatus. The upper side edge of the front guide plate 36c reaches a position in the vicinity of the paper discharge driven roller 35e.

  The recording sheet S on which the toner image is formed is conveyed toward the stocker 36 in the paper discharge path 35 with the surface on which the toner image is formed facing the back side of the apparatus. When the recording sheet S transported in the paper discharge path 35 passes between the paper discharge driving roller 35d and the paper discharge driven roller 35e, the front end portion (upper portion) in the transport direction of the recording sheet S is the paper discharge port 11c. , And protrudes upward from the paper discharge outlet 11c.

In this case, the side edge (lower side edge) of the recording sheet S on the rear end side in the transport direction is held on the outer peripheral surface of the rotating paper discharge driven roller 35e, and the rotation of the paper discharge driven roller 35e is accompanied. After moving to the back side of the apparatus, it falls from the paper discharge driven roller 35e.
As a result, the lower side edge of the recording sheet S is supported on the bottom surface portion 36 b of the stocker 36. As a result, the upper part of the recording sheet S is accommodated along the vertical direction in a state of protruding upward from the paper discharge port 11c.

  When an image forming operation is performed on a plurality of recording sheets S by the image forming mechanism 2, the recording sheets S each having a toner image formed thereon are continuously conveyed to the stocker 36. In this case, the recording sheet S that has passed through the paper discharge driving roller 35d and the paper discharge driven roller 35e one by one is in the stocker 36 with the surface on which the toner image is formed facing the back side of the apparatus. They are accommodated in order from the back side to the front side of the apparatus.

The recording sheets S accommodated in the stocker 36 are in a state where their upper portions protrude upward from the paper discharge outlet 11c. For this reason, the user can take out the recording sheet S from the stocker 36 by grasping the upper part of the recording sheet S accommodated in the stocker 36 and pulling it upward.
The height of the paper discharge port 11c provided on the storage unit upper surface 11b is high enough for a general user to easily grasp the recording sheet S by hand. In the present embodiment, the height of the paper discharge port 11c is about 1000 mm. Therefore, a user standing in front of the housing 10 can easily take out the upper part of the recording sheet S protruding upward from the paper discharge port 11c.

  Further, the paper discharge path 35 and the stocker 36 are integrally attached to the lower front door 11a (see FIGS. 1 and 2). Therefore, when the lower front door 11a is rotated forward, the entire paper discharge path 35 and the stocker 36 are rotated forward together with the lower front door 11a and the housing upper surface 11b. Thereby, the inside of the main body accommodating part 11 will be in the state open | released ahead.

In such a state, the fixing unit 32 is exposed forward from the portion opened forward. Since the fixing unit 32 is supported by a guide member (not shown) so as to be movable in the front-rear direction with respect to the housing 10, the user holds the fixing unit 32 in a state where the inside of the main body storage unit 11 is opened forward. It can be pulled forward from the inside of the main body accommodating portion 11.
In addition, in a state where the fixing unit 32 is pulled out from the main body storage unit 11, the image forming unit 20 is exposed in front of the main body storage unit 11. 11 can be pulled forward from the inside.

When the fixing unit 32 and the image forming unit 20 are pulled out to the front of the housing 10, maintenance of the fixing unit 32 and the image forming unit 20 can be performed in front of the housing 10.
Further, as shown in FIGS. 1 and 2, an upper opening / closing door 11h for opening the upper portion of the paper discharge path 35 is provided on the upper portion of the lower front door 11a. The upper side edge of the upper opening / closing door 11h is rotatably attached to the lower front door 11a by a hinge mechanism (not shown). A lower opening / closing door 11k for opening the lower portion of the paper discharge path 34 is provided at the lower portion of the lower front door 11a. The upper side edge of the lower opening / closing door 11k is also rotatably attached to the lower front door 11a by a hinge mechanism (not shown).

When the upper opening / closing door 11h and the lower opening / closing door 11k are rotated forward about the upper side edge, the sheet discharge path 35 located on the front side of the apparatus in the main body accommodating portion 11 is exposed forward. Become. Thereby, even when the recording sheet S is jammed in the paper discharge path 35, the jammed recording sheet S can be removed.
Next, the image reading mechanism 40 provided in the upper part of the housing 10 on the right side of the apparatus will be described with reference to FIGS.

The image reading mechanism 40 according to the present embodiment acquires image data of a document by reading the image of the document while transporting the set document, similarly to a known sheet-through scanner. The image data acquired by the image reading mechanism 40 is transmitted to the image forming mechanism 2.
The image reading mechanism 40 is configured in a thin rectangular parallelepiped shape having a relatively short thickness. The image reading mechanism 40 is adjacent to the image forming mechanism 2 on the front side of the apparatus on the right side of the housing 10 with the thickness direction along the longitudinal direction of the housing 10 and the longitudinal direction along the vertical direction of the housing 10. Has been placed.

As shown in FIG. 2, the lower end portion of the image reading mechanism 40 is located in the middle in the vertical direction of the housing 10 and below the accommodating portion upper surface 11 b of the main body accommodating portion 11. As a result, as will be described later, the document setting position is above the upper surface 11b of the main body accommodating portion 11.
FIG. 6 is an enlarged view of a longitudinal section of the image reading mechanism 40. As shown in FIG. 6, the image reading mechanism 40 includes a flat platen table 41 on which the document D is set, and a document discharge table 42 provided in parallel with the document table 41 above the document table 41. ing. On the document discharge table 42, the document D on which the image has been read is discharged.

The document table 41 is inclined at an angle of about 15 ° with respect to the front side surface 12 of the housing 10 so that the upper portion of the document table 41 is located on the front side of the apparatus, and the lower side edge is the image reading mechanism. It is located near the lower end of 40.
In the image reading mechanism 40 of the present embodiment, an image is formed on the document surface (hereinafter referred to as “first surface”) and both surfaces of the document (hereinafter referred to as “single-side document”) on which an image is formed on one surface. Images on both sides of a document (hereinafter referred to as “double-sided document”) can be read. In the case of a single-sided document, it is set with respect to the document table 41 such that the first surface faces the side opposite to the document table 41 (the back side of the apparatus). In the case of a double-sided document, the front side (surface with a small page number, hereinafter referred to as “first side”) is directed to the side opposite to the document table 41 (the back side of the apparatus) and the back side (page number). (Hereinafter referred to as “second surface”) is set with the side facing the document table 41 (the front side of the apparatus).

  The upper part of the document table 41 protrudes forward from a lower opening 12 c provided at the upper part of the front side surface 12. As shown in FIGS. 1 and 2, the lower opening 12 c is formed in a rectangular shape that is elongated along the apparatus width direction. The height of the lower side edge of the lower opening 12c is substantially the same as that of the housing upper surface 11b (opening 11c) of the main body housing 11. When the document table 41 has such a height, a user standing in front of the housing 10 can easily set the document D on the document table 41.

  The document discharge table 42 provided above the document table 41 is also inclined to the front side of the apparatus at an angle of about 15 ° with respect to the front side surface 12 of the housing 10. The document discharge table 42 projects forward from an upper opening 12 d provided on the front side surface 12 of the housing 10. The upper opening 12d is disposed above the lower opening 12c at a relatively short distance from the lower opening 12c. As shown in FIG. 1, the upper opening 12d is arranged in the apparatus width direction as in the lower opening 12c. It is formed in a rectangular shape that is elongated along.

A pressing plate (not shown) is provided at the lower portion of the document table 41 to urge the lower portion of the set document toward the back side of the apparatus.
Below the image reading mechanism 40 is provided a document feeder 43 that feeds the document D set on the document table 41 downward on the back side of the apparatus. The document feeder 43 includes a feed roller 43a that feeds down the document D set on the document table 41 and pressed by the pressing plate, a sheet feed roller 43b disposed at the end of the document table 41, and a sheet feed roller. 43b is provided on the lower side of 43b. The separating member 43c is pressed against the paper feed roller 43b.

  When the document D is set on the document table 41, the document D pressed against the feeding roller 43a is fed toward the pressure contact position between the paper feeding roller 43b and the separating member 43c by the rotation of the feeding roller 43a. The lower end of the document D is fed out from the document table 41 downward on the back side of the apparatus as the paper feed roller 43b rotates in a predetermined direction. The separating member 43 c prevents a document other than the document in contact with the paper feed roller 43 b from being fed from the document table 41. As a result, only one document D passes between the feed roller 43b and the separating member 43c and is conveyed toward the back side of the apparatus.

A transport roller pair 44 is provided at a position closer to the back side of the apparatus than the paper feed roller 43b. The transport roller pair 44 transports the document D transported from the document table 41 toward the back side of the apparatus by the paper feed roller 43b upward on the back side of the apparatus.
A second reading sensor 47 that reads an image on the second surface of the double-sided document conveyed by the conveyance roller pair 44 is provided on the downstream side in the conveyance direction with respect to the conveyance roller pair 44. The second reading sensor 45 is configured by, for example, a contact type line sensor (CIS: Contact Image Sensor). The image reading surface of the second reading sensor 45 is directed to the front side of the apparatus. Therefore, when a double-sided document is conveyed upward by the conveyance roller pair 44, the second reading sensor 45 is in a state of being directed to the back side of the apparatus. Two images are read by the second reading sensor 45.

A first intermediate conveyance roller pair 46, a first reading sensor 47, and a second intermediate conveyance roller pair 48 are provided in order along the document conveyance direction on the downstream side (upper side) in the conveyance direction with respect to the second reading sensor 45. It has been.
Similarly to the second reading sensor 45, the first reading sensor 47 is also configured by a contact type line sensor. The first reading sensor 47 has an image reading surface directed toward the back side of the apparatus. Therefore, when the document D transported by the first intermediate transport roller pair 46 is either a single-sided document or a double-sided document, Read the surface image.

On the further downstream side (upper side) of the second intermediate transport roller pair 48 in the transport direction, there is a document discharge roller pair 49 that transports the document D transported by the second intermediate transport roller pair 48 upward on the front side of the apparatus. Is provided. On the front side of the apparatus with respect to the document discharge roller pair 49, the lower end portion of the document discharge table 42 is positioned.
The document D conveyed to the document discharge roller pair 49 is discharged onto the document discharge table 42 by the document discharge roller pair 49. As a result, the document D is held on the document discharge table 42 along the document discharge table 42.

In this case, the document D held on the document discharge table 42 is in a state where the first surface is directed to the document discharge table 42 side (the front side of the apparatus). When a plurality of documents D are set on the document table 41, the first surface of the document D is placed on the document discharge table 42 from the front side of the device with the first surface facing the document discharge table 42 side (device front side). They are stacked in a line on the back side of the device.
The upper opening 12d is disposed above the lower opening 12c, but is close to the lower opening 12c. For this reason, a user standing on the front side of the apparatus of the housing 10 can easily take out the document D on the document discharge table 42 with the upper portion protruding from the upper opening 12d from the document discharge table 42.

  Each of the document table 41 and the document discharge table 42 protrudes forward from the front side surface 12 of the housing 10, and the side edge located on the front side of each apparatus is the position on the most back side of the apparatus in the image reading mechanism 40. ing. In this case, the side edges of the document table 41 and the document discharge table 42 located on the front side of the apparatus are located on the back side of the apparatus with respect to the vertical surface including the lower front door 11 a of the main body housing portion 11 in the housing 10. The lower front door 11a of the main body accommodating portion 11 is a position on the most front side of the apparatus in the image forming mechanism 2. Therefore, the most front side portion of the image reading mechanism 40 is more than a vertical surface including the lower front door 11a. Located on the back side of the device.

The image reading mechanism 40 is located on the front side of the apparatus with respect to the back surface 14 of the housing 10. The rear surface 14 of the housing 10 is the most back side portion of the image forming mechanism 2, and therefore the portion of the image reading mechanism 40 that is located closest to the back side of the apparatus includes the position of the image forming mechanism 2 that is closest to the back side of the device. It is located on the front side of the device with respect to the vertical plane.
As described above, the image reading mechanism 40 is disposed between the vertical surface including the most apparatus rear side portion and the vertical surface including the most apparatus front side portion in the image forming mechanism 2. In addition, the image reading mechanism 40 is disposed adjacent to the right side of the image forming mechanism 2 without overlapping the image forming mechanism 2 when the image forming mechanism 2 is viewed from the front side and the upper side of the apparatus. ing. Thereby, the overall depth dimension in the image forming apparatus is equal to the depth dimension of the image forming mechanism 2.

Next, in the image forming apparatus of the present embodiment, a toner image is formed on the recording sheet S by the image forming mechanism 2 based on the image data of the single-sided original read by the image reading mechanism 40 and printed out. Will be described.
A single-sided document is set on the document table 41 of the image reading mechanism 40 in the order of pages with the first side facing the opposite side of the document table 41 (the back side of the apparatus). In this case, the single-sided original set on the document table 41 is conveyed in the order of pages, and the image on the first side of the conveyed single-sided original is read by the first reading sensor 47 in order.

  Thereafter, the single-sided document is discharged to the document discharge table 42 with the first side facing the document discharge table 42. As a result, in the document discharge table 42, the document D is stacked in page order from the front side of the apparatus to the back side of the apparatus. Accordingly, a plurality of single-sided documents discharged to the document discharge table 42 are stacked in the page order with the first surface directed in the same direction (forward) as in the state of being set on the document table 41. Yes. This eliminates the need for the user to rearrange a plurality of single-sided documents taken out from the document discharge table 42 in page order.

  In the image forming mechanism 2, toner images are formed in the order of reading based on the image data of the first side of each single-sided document read by the first reading sensor 47, and are formed on each side of the plurality of recording sheets S. Transfer and fix in order. As a result, in the stocker 36, the recording sheets S on which the toner images are formed are arranged in order from the apparatus back side to the apparatus front side with the surface on which the toner images are formed facing the apparatus back side.

In this case, in the stocker 36, the respective recording sheets S on which the same image as a plurality of single-sided originals set on the original table 41 are formed are stacked in the same order as the page order of the single-sided originals. . Therefore, the user does not need to rearrange the plurality of recording sheets S taken out from the stocker 36 in the page order.
In the image forming apparatus of the present embodiment, when the image reading mechanism 40 reads the images on the first side and the second side of the double-sided document, two toner images corresponding to the respective image data are read. Each is formed on one side of the recording sheet S. In this case, toner images based on the respective image data are successively formed on one side of the two recording sheets S in order of pages on the first side and the second side.

Also in this case, in the stocker 36, a plurality of recording sheets on which toner images are formed are stacked in the order corresponding to the page order image of the double-sided document from the back side of the apparatus to the front side of the apparatus. . Therefore, the user does not need to rearrange the plurality of recording sheets taken out from the stocker 36 in the page order.
As described above, in the image forming apparatus according to the present embodiment, the image forming units 23Y, 23M, 23C, and 23K of the image forming unit 20 provided in the housing 10 are arranged in the vertical direction. Thereby, the dimension in the depth direction of the housing 10 is shorter than the case where the image forming units are arranged in the horizontal direction. In addition, in the area adjacent to the right side of the image forming mechanism 2 in the image forming mechanism 2, the image reading mechanism 40 is located between the vertical surface including the most apparatus rear side portion and the vertical surface including the most apparatus front side portion of the image forming mechanism 2. Has been placed. For this reason, even if the image reading mechanism 40 is provided together with the image forming mechanism 2, there is no possibility that the depth dimension of the housing 10 becomes larger than the depth dimension of the image forming mechanism 2.

Therefore, even when the image forming apparatus according to the present embodiment is disposed along a passage in a floor such as a store, there is no possibility that the image forming apparatus protrudes greatly toward the passage. As a result, there is no possibility that the user's passage will be hindered, and there is no possibility that the user will receive a great sense of pressure.
Note that the image reading mechanism 40 is not limited to be disposed in the area adjacent to the right side of the image forming mechanism 2 but may be disposed in the area adjacent to the left side of the apparatus. Further, the image forming mechanism 2 may be configured so that a part is included between the vertical surface including the most apparatus rear side portion and the vertical surface including the most apparatus front side portion. In this case, the depth dimension of the entire apparatus is slightly longer than the depth dimension of the image forming mechanism 2, but can still be shorter than when the image forming units are arranged in the horizontal direction.

  Further, in the image forming apparatus according to the present embodiment, when the lower front door 11a provided in the main body accommodating portion 11 of the housing 10 is rotated forward, the inside of the main body accommodating portion 11 is opened forward. In such a state, since the fixing unit 32 and the image forming unit 20 can be pulled out forward, the maintenance work of the fixing unit 32 and the image forming unit 20 can be performed in front of the image forming apparatus. it can. Therefore, it is not necessary to provide spaces for maintenance work of the fixing unit 32 and the image forming unit 20 on both the left and right sides of the image forming apparatus.

  Further, in the image forming apparatus according to the present embodiment, since the paper feeding unit 31 can also be pulled out to the front of the main body storage unit 11, the replenishment operation of the recording sheet S into the paper feeding cassette 31a is performed. It can be executed in the front. Therefore, it is not necessary to provide a space for replenishing the recording sheet S into the paper feed cassette 31a on both the left and right sides of the image forming apparatus.

  Furthermore, in the image forming apparatus of the present embodiment, the lower front door 11a provided on the front side of the main body housing 11 is provided with an upper door 11h and a lower door 11k that are rotated forward. Yes. When the upper opening / closing door 11h and the lower opening / closing door 11k are rotated forward, the upper and lower portions of the paper discharge path 35 are opened forward. As a result, the jammed recording sheet S can be removed at each of the upper part and the lower part of the paper discharge path 35.

As described above, since the processing for the paper jam of the recording sheet S can be executed in front of the image forming apparatus, the processing for the paper jam of the recording sheet S is executed on both the left and right sides of the image forming apparatus. There is no need to provide space.
Further, in the image forming apparatus according to the present embodiment, the upper front door 15 that is integrally rotated with the display panel 61 and is rotated forward is provided at the upper portion of the housing 10 on the left side of the apparatus. , The device rear side portion of the display panel 61 is opened forward. In such a state, each replacement operation of the toner bottles 51Y, 51M, 51C, 51K provided on the back side of the display panel 61 can be executed on the front side of the apparatus. Therefore, it is not necessary to provide a space for performing the replacement operation of the toner bottles 51Y, 51M, 51C, and 51K on both the left and right sides of the image forming apparatus.

  From the above, in the image forming apparatus according to the present embodiment, when installing the image forming apparatus on a store floor or the like, it is necessary to secure space for performing various operations on both the left and right sides of the image forming apparatus. Absent. For this reason, various products can be arranged on the floor of a store or the like without providing spaces on the left and right sides of the image forming apparatus. Therefore, it is possible to efficiently arrange products together with the image forming apparatus of the present embodiment on a store floor or the like.

In the above-described embodiment, the toner bottles 51Y, 51M, 51C, and 51K of the toner supply mechanism 50 provided on the back side of the display panel 61 in the housing 10 are arranged in this order in the vertical direction. It is said. However, the order in which the toner bottles 51Y, 51M, 51C, 51K are arranged in the vertical direction is not particularly limited.
Further, the configuration is not limited to the configuration in which the four toner bottles 51Y, 51M, 51C, and 51K are arranged in the vertical direction. For example, any two toner bottles may be arranged side by side in the front-rear direction, and the other two toner bottles may be arranged below each of the two toner bottles.

  Further, any two toner bottles are arranged side by side along the vertical direction on the apparatus back side of the display panel 61, and the other two toner bottles are arranged along the vertical direction on the apparatus back side of the image reading mechanism 40. It is good also as a structure arrange | positioned side by side. In this case, the image reading mechanism 40 can be rotated forward with respect to the housing 10 so that the toner bottle provided on the rear side of the image reading mechanism 40 can be replaced. Alternatively, the image reading mechanism 40 may be arranged to be shifted downward, and an opening / closing door that can be rotated forward is provided on the upper side of the image reading mechanism 40 so that the toner bottle can be replaced.

[Embodiment 2]
FIG. 7 is a schematic front view of the image forming apparatus according to the second embodiment, and FIG. 8 is a schematic cross-sectional view taken along the line DD in FIG. In the image forming apparatus according to the second embodiment, as shown in FIGS. 7 and 8, the height of the housing 10 is higher than that of the image forming apparatus according to the first embodiment. In this case, the length of the main body accommodating portion 11 in the vertical direction, the dimension in the front-rear direction in the housing 10 and the dimension in the apparatus width direction are the same as those in the first embodiment.

In the second embodiment, the upper front door 15 provided on the upper side of the main body accommodating portion 11 on the left side of the housing 10 is elongated in the vertical direction, and the display panel 61 provided on the upper front door 15 is configured as described above. The display surface 61a is longer than that of the first mode.
A toner replenishing mechanism 50 is provided in the space on the rear side of the display panel 61 as in the first embodiment. In this case, the space on the back side of the display panel 61 is wider in the vertical direction than in the first embodiment, and the toner bottle 51Y having a larger diameter than that in the first embodiment is included in this space. , 51M, 51C, 51K are accommodated. Accordingly, the amount of toner contained in each of the toner bottles 51Y, 51M, 51C, and 51K is larger than that in the first embodiment.

The image reading mechanism 40 is disposed at the same height as in the first embodiment.
Other configurations are the same as those of the first embodiment.
As described above, in the image forming apparatus according to the second embodiment, since the display screen 61a of the display panel 61 is large, the user can easily see the display on the display screen 61a, and the touch operation on the display screen 61a is also performed. It becomes easy.

Furthermore, since the amount of toner stored in each of the toner bottles 51Y, 51M, 51C, 51K is increasing, the replacement cycle of each of the toner bottles 51Y, 51M, 51C, 51K can be lengthened.
[Embodiment 3]
FIG. 9 is a schematic front view of the image forming apparatus according to the third embodiment. In the image forming apparatus according to the third exemplary embodiment, toner bottles 51Y, 51M, 51C, and 51K of the toner replenishing mechanism 50 are provided in the upper portion of the housing 10 on the right side of the apparatus. The toner bottles 51 </ b> Y, 51 </ b> M, 51 </ b> C, 51 </ b> K are arranged in that order along the vertical direction, and the two lower toner bottles 51 </ b> C and 51 </ b> K are positioned in the apparatus rear side of the image reading mechanism 40. doing.

  A right front door 18 is provided in the upper portion of the housing 10 on the right side of the apparatus. The right front door 18 has a side edge portion on the right side of the device attached to a side edge portion on the right side of the device in the housing 10 so as to be pivotable forward by a hinge mechanism (not shown). An image reading mechanism 40 is attached to the lower part of the right front door 18, and when the right front door 18 rotates forward, the image reading mechanism 40 also integrally rotates forward.

Other configurations are the same as those of the image forming apparatus according to the second embodiment illustrated in FIGS. 7 and 8.
In such a configuration, when the right front door 18 rotates forward, all the toner bottles 51Y, 51M, 51C, 51K are opened forward and can be replaced. Therefore, it is not necessary to secure a space for replacing the toner bottles 51Y, 51M, 51C, and 51K on both the left and right sides of the image forming apparatus.

[Embodiment 4]
FIG. 10 is a schematic front view of the image forming apparatus according to the fourth embodiment. In the image forming apparatus according to the fourth embodiment, a display panel 61 is provided on the upper right side of the apparatus in the housing 10. In this case, the image reading mechanism 40 is disposed at a position lower than the image reading mechanism 40 in the image forming apparatus according to the second embodiment shown in FIGS. 7 and 8. Thus, when the document D is discharged onto the document discharge table 42, the upper portion of the document D is configured not to be positioned in front of the display screen 61a of the display panel 61. Thereby, there is no possibility that the display screen 61a of the display panel 61 is hidden by the document D discharged onto the document discharge table.

Other configurations are the same as those of the image forming apparatus of the second embodiment.
The image forming apparatus according to the fourth embodiment configured as described above can achieve the same effects as the image forming apparatus according to the second embodiment.
[Modification]
<Modification 1>
The image reading mechanism 40 has a configuration in which the document table 41 and the document discharge table 42 are provided. However, the document table 41 and the document discharge table 42 may be omitted. In this case, the user directly sets the original in the lower opening 12c, and the original whose image has been read is directly discharged from the upper opening 12d.

<Modification 2>
In the above embodiment, the front side surface 12 of the housing 10 is positioned on the back side of the apparatus with respect to the lower front door 11 a of the main body housing portion 11, and the document table 41 of the image reading mechanism 40 is forward from the front side surface 12. It is in a protruding state.
Instead of such a configuration, the front side surface 12 of the housing 10 and the lower front door 11a of the main body accommodating portion 11 may be positioned in the same plane. In this case, without changing the position of the image reading mechanism 40 with respect to the image forming mechanism 2, only the front side surface 12 of the housing 10 is positioned in the same plane as the lower front door 11 a of the main body accommodating portion 11. As a result, the document table 41 is positioned on the back side of the apparatus without protruding forward from the front side surface 12 of the housing 10.

In the case of such a configuration, instead of the configuration in which the front side surface 12 is provided with two openings of the lower opening 12c and the upper opening 12d, the document table 41 and the document discharge table 42 on the front side of the apparatus are arranged. It is set as the structure which provides only one opening part in the apparatus front side of a side edge part.
Further, the display surface 61 a of the display panel 61 is also disposed so as to be located in the same plane as the front side surface 12. In this case, an opening is provided in the front side surface 12 so that the space between the paper discharge outlet 11c and the display panel 61 communicates with the external space on the front side of the apparatus.

  Even in such a configuration, the image reading mechanism 40 includes a vertical surface (a back surface 14) including a portion located on the most front side of the apparatus in the image forming mechanism 2 and a portion located on the most back side of the apparatus in the image forming mechanism 2. It is located between the vertical surfaces (the front side surface 12a and the lower front door 11a). Accordingly, the depth dimension of the image forming apparatus can be reduced as in the above embodiments. Moreover, since there is no portion protruding from the front side surface 12a and the lower front door 11a located on the front side of the housing 10, the design is excellent.

  INDUSTRIAL APPLICABILITY The present invention is useful as a technique for reducing the dimension in the depth direction even in a configuration in which an image reading mechanism is provided in an image forming apparatus capable of printing out a color toner image.

2 Image forming mechanism 10 Housing 11 Main body accommodating portion 11a Lower front door 11c Paper discharge port 12 Front side surface 13 Upper surface 14 Back surface 15 Upper front door 20 Image forming portion 21a Intermediate transfer belts 23Y, 23M, 23C, 23K Image forming unit 23a Photoconductor Drum 31 Paper feed unit 32 Fixing unit 36 Stocker 40 Image reading mechanism 41 Document table 42 Document discharge table 45 Second reading sensor 47 First reading sensor 50 Toner supply mechanism 61 Display panel 61a Display surface

Claims (13)

An image forming mechanism in which a plurality of image forming units each forming a toner image of a different color are arranged in the vertical direction, and the toner images formed by the respective image forming units are transferred and fixed on a sheet; ,
An image reading mechanism for reading an image of a document,
The image reading mechanism includes:
When viewed from the front side of the apparatus and from the upper side of the apparatus, the image forming mechanism includes a vertical plane including a part positioned closest to the apparatus back side and a part positioned closest to the apparatus front side in a state where the image forming mechanism does not overlap with the image forming mechanism. It is arranged to be located between the vertical plane including
An original table on which an original is set in an inclined state so that the upper part is positioned on the front side of the apparatus with respect to the vertical direction
A document discharge table arranged in a vertical direction with respect to the document table;
A document conveying means for conveying a document set on the document table to the back side of the apparatus along the document table, and then conveying the document to the document discharge table;
Image reading means for reading an image of a document conveyed by the document conveying means;
The plurality of image forming units and an intermediate portion disposed along the vertical direction so that toner images formed by each of the plurality of image forming units are transferred on the front side of the plurality of image forming units. An image forming unit comprising: a transfer belt; and a transfer member that transfers the toner image transferred to the intermediate transfer belt onto a sheet below the intermediate transfer belt;
A fixing unit for fixing the toner image transferred onto the sheet on the front side of the apparatus with respect to the transfer member;
A sheet supply unit that supplies sheets to the image forming unit from below the image forming unit;
Images forming device you further comprising a. The sheet on which the toner image is fixed in the fixing unit, the sheet discharge path for conveying upward the sheet discharge port of claim 1, characterized in that provided on the apparatus front side of the intermediate transfer belt Image forming apparatus. The image forming mechanism further includes a sheet storage unit that stores the sheet in a state along the vertical direction so that an upper portion of the sheet discharged from the sheet discharge path protrudes from the sheet discharge port. The image forming apparatus according to claim 2 . When the image reading mechanism reads the image of the document set on the document table in the page order by the image reading unit, the document is superimposed on the document discharge table in the page order,
The image forming mechanism sequentially forms toner images based on the image data of each page of a plurality of documents read in page order by the image reading unit on a plurality of sheets, and a plurality of sheets are formed in the sheet storage unit. The image forming apparatus according to claim 3 , wherein the sheets are stacked in a state of being arranged in page order. In each of the plurality of image forming units, a rotatable photoconductor is provided in a horizontal state along a direction perpendicular to the sheet conveyance direction with respect to the rotation axis direction.
The image reading mechanism, any one of claims 1 to 4, characterized in that arranged on the front side of the apparatus of the region adjacent to the rotation axis direction of the photosensitive member to the plurality of image forming units The image forming apparatus described in 1. The image reading mechanism is arranged such that a document set on the document table and a sheet stored in the sheet storage unit of the image forming mechanism are at the same height position. The image forming apparatus according to claim 4 or 5 . The image forming apparatus according to claim 4 , wherein a display panel is provided above the sheet discharge port. A plurality of toner replenishing containers each containing toner to be replenished to each of the plurality of image forming units;
The image forming apparatus according to claim 7 , wherein the plurality of toner supply containers are provided on a rear side of the display panel. A plurality of toner replenishing containers each containing toner to be replenished to each of the plurality of image forming units;
The image forming apparatus according to claim 7 , wherein the plurality of toner supply containers are provided on a rear side of the image reading mechanism. The image forming apparatus according to claim 4 , wherein a display panel is provided above the image reading mechanism in a state where a display surface is directed to the front side of the apparatus. A plurality of toner replenishing containers each containing toner to be replenished to each of the plurality of image forming units;
The image forming apparatus according to claim 10 , wherein the plurality of toner supply containers are provided in a region located above the image forming unit. The image forming apparatus according to claim 1 , wherein the image forming unit, the fixing unit, and the sheet supply unit can be pulled out to a front side of the apparatus. The image forming apparatus according to claim 3 , wherein the sheet discharge path is openable to a front side of the apparatus.

Images