JPH11327240A - Image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an image forming device capable of carrying a recording paper from a device body side to an L-shaped unit side without being obstructed by the rear end of the L-shaped unit projecting from the device main body at the time of attaching the L-shaped unit to the device body. SOLUTION: A built-in cassette 6 is attachably/detachably arranged on the upper part of an electronic controller 4 arranged in an image forming device body 1, and the L-shaped unit 2 provided with a base part 26 having an upper surface part which is wider than the base of the body 1 and on which the base is placed, and an erect part 5 erected from the upper surface part along the rear surface of the body 1 and communicating with an ejection port on the rear surface of the body 1 is attached to the main body 1. Then, a housing space in which the rear end of the cassette 6 projecting from the rear surface of the body 1 is housed is formed in the erect part 5, so that a carrying path capable of carrying the recording paper from the ejection port to the lower side of the cassette 6 bypassing the rear end of the cassette 6 is formed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus in which various units for transporting recording paper to the apparatus main body can be placed under the image forming apparatus main body in a stacked state, and in particular, an image using an L-shaped unit. The present invention relates to a forming apparatus.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Patent Laid-Open No.
As described in Japanese Patent Laid-Open No. 1 (Kokai) No. 1 (1999) -1990, there is known an image forming apparatus in which an image forming apparatus main body is mounted on an L-shaped reversing unit. In this manner, the recording paper can be supplied from both the built-in cassette detachably mounted on the apparatus main body side and the paper supply unit detachably mounted on the lower side of the L-shaped unit, which is convenient and convenient. is there.

[0003]

However, if a built-in cassette longer than the main body of the apparatus is used, the built-in cassette protrudes from the rear surface of the main body of the apparatus, making it difficult to install the L-shaped unit.

In the apparatus main body, the recording paper is conveyed substantially horizontally, and it is necessary to change the direction of the recording paper from the apparatus main body downward to various units mounted on the lower side of the apparatus main body. A sharp turn can cause jams.

In view of the above circumstances, the present invention provides an L-shaped unit protruding from the apparatus main body when the L-shaped unit is mounted on the apparatus main body without obstructing the rear end of the unit. An object of the present invention is to provide an image forming apparatus that can be transported to a unit side. Another object of the present invention is to provide an image forming apparatus in which a rational conveyance path for receiving recording paper from the apparatus main body and conveying the recording paper to an L-shaped unit is formed. It is another object of the present invention to provide an image forming apparatus capable of using large recording paper with a built-in cassette of the apparatus main body when the L-shaped unit is mounted on the apparatus main body.

[0006]

According to the image forming apparatus of the present invention, it is possible to form an image by supplying recording paper by the image forming apparatus main body (apparatus main body) alone and to stack various units under the apparatus main body. It is assumed that it can be placed in a state. The various units include a sheet reversing unit on which images are transferred on both sides, a sheet feeding unit for forming a large number of images, a sheet discharging unit for stacking recorded sheets,
Sorters and the like are included.

[0007] Basically, an electric control device is arranged at a lower portion in the apparatus main body, and the recording paper is larger than a recording paper accommodated in a paper feed unit placed in a stacked state below the apparatus main body. By arranging a built-in cassette capable of storing the recording paper detachably at the upper part of the electric control device, it is possible to use a recording paper larger than a recording paper by a paper feeding unit mounted on the apparatus main body, An image forming operation can be performed by the apparatus main body alone.

In the apparatus main body side, a recording paper discharge port is provided on the rear side, and the rear end of the built-in cassette is mounted so as to protrude from the rear side, and the unit body is mounted from the front side of the apparatus main body. A cross section L having a base longer than the device main body in the direction of the rear surface and on which the device main body is mounted, and a rising portion standing up from the base along the rear surface of the device main body and communicating with the discharge port. The upright portion is provided with a conveyance path for conveying the recording paper from the contact surface with the rear surface of the apparatus main body to a surface opposite to the contact surface and conveying the recording paper to the base portion. .

According to the present invention, a recording paper discharge port is provided on the rear side of the apparatus main body, and an upright portion of the unit body is connected to the discharge port in an L-shaped cross section.
It is only necessary to discharge the recording paper from the rear surface of the apparatus main body to communicate with the paper discharge unit or the sorter. Therefore, it is not necessary to increase the length of the apparatus main body in accordance with the length of the unit body. Provided.

[0010] Then, a built-in cassette is arranged on an upper part of an electric control device provided in a lower part in the apparatus main body, and a rear end of the built-in cassette is mounted on the apparatus main body by projecting a rear end from the rear side. A storage space for storing the rear end of the built-in cassette is formed in an upright portion rising from the base of the L-shaped unit mounted on the main body, and the recording paper from the recording paper discharge port on the rear surface of the apparatus main body is moved to the back of the built-in cassette The L-shaped unit can be connected to the apparatus main body by forming a transport path that can be transported below the built-in cassette by bypassing the end, so that the distance from the base to the discharge port can be increased. Thus, it is possible to form a recording paper transport path to the base side without abrupt change of direction from the discharge port.

It is also an effective means of the present invention that the conveying path of the upright portion is formed in a substantially arc shape so as to convey the recording paper to the base. By forming the transport path in an arc shape with the built-in cassette interposed, a large arc can be formed and the friction between the transport path wall surface and the recording paper can be reduced, and the recording paper can be transported smoothly.

A transport roller is provided on a transport path of the upright portion, and a rotation axis of a drive motor for rotating the transport roller is disposed on a side surface of the upright portion. The unit body is configured to be protruded from the rear surface thereof and can be mounted, the upright portion of the unit body forms a storage space capable of storing the rear end of the built-in cassette, and the transport path of the upright portion is stored. A rotary shaft of a drive motor that is formed so as to convey the recording paper to the base by bypassing the rear end of the built-in cassette, or that a conveying roller is provided on a conveying path of the upright portion, and the conveying roller is driven to rotate. It is also an effective means of the present invention that the core is arranged at a portion corresponding to the side surface of the built-in cassette outside the storage space.

According to this technical means, the conveying path of the upright portion is formed so as to convey the recording paper to the base portion by bypassing the rear end of the stored built-in cassette. The discharge rollers are arranged vertically above and below the built-in cassette, and the drive motor is arranged at a portion corresponding to the side surface of the built-in cassette outside the storage space, so that the two rollers are arranged at substantially the same distance. As a result, it is possible to realize a rational design without the rotational torque being biased to one side in a state where the rotational linear velocities of both rollers are set to be the same.

[0014]

Embodiments of the present invention will be illustratively described in detail below with reference to the drawings. However, unless otherwise specified, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the invention, but are merely described. It is only an example.

FIG. 1 is a schematic configuration diagram of an image forming apparatus provided with a sheet reversing device according to an embodiment of the present invention, and FIG.
FIG. 3 is an explanatory diagram illustrating a state in which the image forming apparatus main body, the sheet reversing unit, and the sheet feeding unit are stacked and arranged. 3, the positioning pins 54, 54 on the reversing portion 26 of the paper reversing unit 2 and the device holes 52, 5
2 and the terminal 57 completes the electrical connection between the apparatus main body 1 and the sheet reversing unit 2.

When a paper cassette (built-in cassette) 6 longer than the length of the apparatus main body 1 in the front-rear direction is set in the apparatus main body 1, as shown in FIG. Since the end protrudes from the rear surface 1b of the apparatus main body 1, when the apparatus main body 1 is placed, it is necessary to incline a paper passing portion 5 described later outward as shown in FIG. As shown in FIGS. 4 and 6, a back cover 1d is detachably disposed on the back surface 1b of the apparatus main body 1. When the rear cover 1d is combined with the sheet reversing unit 2, the back cover 1d is removed from the apparatus main body 1.

Similarly, the device holes 53, 53 of the sheet reversing unit 2 and the positioning pins 55, 5
5 and the terminal 58 completes the electrical connection between the sheet reversing unit and the sheet feeding unit 3. It should be noted that a plurality of paper feed units having the same size can be mounted in a multi-stage manner, so that a large-capacity image can be recorded.

As shown in FIG. 6, a cord 65 of a power cord connector 63 connected to a terminal 67 on the rear side of the apparatus main body 1 and a cord 66 of a printer cable connector 64 connected to a terminal 68.
Are printer cable holes 5d, A from the space between the left chamber 5a 'and right chamber 5b' of the paper passing unit 5 and the upper surface of the reversing unit 26, respectively.
It is inserted into a through hole communicating with the C cable hole 5c, and after the apparatus main body is placed, the paper passing portion 5 is rotated and returned as shown by the solid line.

Therefore, even if the rear surface of the apparatus main body is not exposed by the paper passing section 5 standing up from the unit body formed in the L-shaped cross section, the power supply or the signal terminal is set at another place in the apparatus main body. It is not necessary to provide the terminal, and it can be used as a terminal used alone. In this case, if the through hole is formed to have a diameter larger than that of the cord, air can be circulated and the through hole can be used for cooling the inside of the apparatus main body.

Further, as shown in FIG.
An electric controller 4 is built in and the terminal 5
The sheet reversing unit 2 and the sheet feeding unit 3 are connected to the controller 4 via 7, 58. A paper cassette (built-in cassette) 6 is provided above the controller 4.
Are arranged, and a multi-purpose tray 8 is provided on the front side of the apparatus main body so that various types of paper can be supplied.

Therefore, it is possible to form an image on a recording sheet even if the sheet feeding unit 3 is not disposed. However, the sheet feeding unit 3 uses a frequently used recording sheet such as an A4 size sheet. A recording paper larger than the recording paper stored in the paper feeding unit 3 (for example, A3 size) is used for the cassette 6, and a recording paper smaller than the recording paper used for the paper feeding unit 3 is used for the multi-purpose tray 8. preferable.

In the apparatus main body 1, a transport unit 10 in which the paper feed cassette 6 is detachably mounted is detachably disposed (FIG. 5), and both the apparatus main body 1 and the transport unit 10 have a well-known electronic device. Photographic processing means is arranged. A photosensitive drum 9 and a paper feed roller 15 are arranged on the apparatus body 1 side, and are configured to be able to convey the recording paper from the multi-purpose tray 8 to the photosensitive drum 9 side. On the front surface 1a side of the apparatus main body 1 adjacent to the controller 4, a paper path unit 47 for obtaining a driving force from a motor 45 provided in a reversing unit 26 of the sheet reversing unit 2 described later, and a transport roller 48 are provided. Reversing unit 2
The recording paper from the printer can be conveyed to the apparatus main body 1 side. Note that a charger, a cleaning device, a developing device, a latent image forming device, and the like necessary around the photosensitive drum 9 are not shown for convenience.

On the downstream side of the photosensitive drum 9, a pair of fixing rollers 18, a pair of conveying rollers 19, and a guide 2 for switching the sheet discharging direction are provided.
4 (FIG. 2), and the guide 24
Side or the paper passing unit 5 side. The switching of the guide 24 is performed by the operation of the front front panel 25 of the apparatus main body 1 or the paper reversing unit 2.
In the double-sided recording mode, the selection can be automatically switched.

In the single-sided recording mode, the guide 24 forms a path to the paper discharge unit 22 side, and the recording paper
0, the sheet is conveyed to a sheet discharge section 22 via a sheet discharge roller pair 21. In the double-sided recording mode, the guide 24 forms a path to the paper passing unit 5 of the sheet reversing unit 2 described later, and when the image formation on one side of the recording paper is completed, the recording paper is conveyed to the paper passing unit 5. When the recording paper starts image formation on the other side, the guide 24 is switched to form a passage to the paper discharge unit 22 side.

On the transport unit 10 side, the photosensitive drum 9
A registration roller pair 17, a registration sensor 11, a transport roller 16, and a pickup roller 7 are disposed on the upstream side of the transfer roller 12. 1 on the front 1a side,
A multi-purpose tray 8 is arranged so as to be openable and closable (FIG. 2).

Therefore, the transport unit 10 includes the multi-purpose tray 8, the transport roller 16, and the pair of registration rollers 1.
7. The transfer roller 12 can be integrally pulled out of the apparatus main body 1, and the recording paper jam having a leading end between the photosensitive drum 9 and the fixing roller pair 18 and the recording in the transport path on the front side of the jam. It is possible to deal with paper jams.

Next, the configuration of the sheet reversing unit 2 will be described. The paper reversing unit 2 has an L-shaped overall cross-sectional shape, and includes a reversing unit 26 for reversing and feeding recording paper, and a paper passing unit 5.
It is composed of The reversing part 26 is formed in a trapezoidal shape having upper and lower surfaces formed by long sides having a front-rear length longer than the front-rear length of the apparatus main body 1 and short sides having the same length as the lateral width of the apparatus main body 1. Is provided with a reversing mechanism described later.

The paper passing portion 5 is formed in a trapezoidal block shape having a bottom surface that can be stored as an upright portion in the remaining portion obtained by subtracting the bottom shape of the apparatus main body 1 from the upper surface of the reversing portion 26.
Then, the left chamber 5a and the right chamber 5 forming the trapezoid block are formed.
b (FIG. 3) are connected to each other by a support (not shown) and integrally formed, and an arm 30 to which the left chamber 5a and the right chamber 5b are fixedly attached.
Thereby, it is configured so as to be able to rotate and contact with the apparatus main body 1.

As shown in FIG. 2, the paper passing section 5 includes a pair of conveying rollers 29 for receiving recording paper from the apparatus main body 1 and conveying the recording paper to a downstream side, and a discharge tray arranged downstream of the conveying roller pair 29. A discharge roller pair 28 that discharges the recording paper to 31, a conveyance roller pair 34 that is disposed downstream of the conveyance roller pair 29 and conveys the recording paper to the reversing unit 26 side, and is disposed at a discharge port to the reversing unit 26. A sensor 36 disposed between the transport roller pair 29 and the paper discharge roller pair 28 and the paper discharge tray 31
Switching guide 3 for switching the transport of recording paper to and from the 6th side
2, a solenoid 33 for driving the guide 32, a space in which the rear end of the sheet feeding cassette 6 is inserted, a motor 35 disposed on the left chamber 5a side of the space, and the like.

The recording paper in the paper passing section 5 is driven by a driving force transmitted from a motor 35 via a belt 61.
The belt 61 includes a rotating shaft 35 a of the motor 35 and the roller 5.
0, one roller 29A of the pair of transport rollers, one roller 28A of the pair of discharge rollers 28, and one roller 34A of the pair of transport rollers 34. And
The roller 50 is disposed so as to be slightly adjustable left and right in order to adjust the tension of the belt.

The space in which the leading end of the sheet cassette 6 is inserted is provided at a substantially central portion of the sheet passing section 5 avoiding the rollers, and the motor 35 is also provided in the area where the sheet cassette 6 extends. It is arranged at a position shifted laterally. A flat motor is used as the motor 35, and the lengths of the conveying roller pairs 29 and 34 and the belt 61 are set to be substantially the same from the motor rotation shaft 35a. It is desirable to set. Note that the motor 35 and each roller may be connected by a gear. Further, the connecting portion between the discharge roller 28A and the belt 61 is separate from the connecting portion between the discharging roller 28A and the belt 61, and the connecting portion between the discharging roller 28A and the belt 61 is frictionally connected.
It is desirable that the difference in feed speed between the above and the above can be adjusted by the friction.

As described above, the controller 4 is disposed at the lowermost portion of the apparatus main body 1, the paper feed cassette 6 of the transport unit 10 is located thereon, and the fixing roller is disposed on the upper surface side of the transport unit 10 from the recording paper transport start end. Since the transport path to the pair 18 is formed, the vertical distance from the transport path to the lower surface of the apparatus main body 1, that is, the height can be increased. This means that the reversing portion 26 facing the bottom surface of the apparatus main body 1 from the receiving port on the paper passing section 5 side for receiving the recording paper transferred from the recording paper discharge port on the apparatus main body side communicating with the conveyance path. Therefore, the distance to the upper surface of the motor 35 can be increased, so that the paper transport path in the paper passing section 5 can be formed and arranged to be large in an arc shape centered on the rotation axis of the motor 35, and unreasonable bending can be prevented. A sufficient transport space can be secured.

The reversing section 26 is provided along the transport path with the transport rollers 3.
7A, 37B, a sensor 38, a pair of transport rollers 39A, 39B to which a driving force is transmitted from a motor 49, a sensor 40, and a transport roller 4 to which a driving force is transmitted from a step motor 44.
1A, 41B, sensor 42, drive roller 39A of transport roller pair 39 and drive roller 37A of transport roller pair 37
There are provided a tension roller 43 for adjusting the tension of the belt 62 stretched around, and a pair of transport rollers 46A and 46B to which a driving force is transmitted from a motor 45. still,
The motor 45 is configured to be able to transmit a driving force to the transport roller 48 of the paper path unit 47 via a gear train (not shown).

The recording paper transported by the transport roller pairs 37, 39 and 41 passes through the sensor 42 at the leading end and is transported deeper than the transport roller pair 43. It stops in the state of being pinched by the pair 41. At this time, the rotation of the motor 49 that drives the transport roller pairs 37 and 39 and the tension roller 43 also stops.

When the recording paper is fed reversely, the recording paper is rotated by the reverse rotation of the forward / reverse rotating motor 44 while the pair of conveying rollers 41 sandwich the recording paper.
The reverse feed of 1 is reversed. Then, the sheet is conveyed to the apparatus main body 1 by the motor 45 via the conveying roller pair 46. Here, the sensors 38, 40, and 42 detect the leading and trailing ends of the recording paper and control the forward and reverse rotation of the motor 44. That is, while the recording paper is being detected by the sensor 38, the motor 44 continues to rotate forward, and continues to rotate forward when the sensor 40 is on and the sensor 42 is on, but when the sensor 40 is off. Stop rotation.

Next, the operation of performing double-sided printing using the sheet reversing unit 2 will be described in more detail. In the present embodiment, the motor and the sensor are arranged and controlled at predetermined positions in the unit so as to reduce the waiting time when performing double-sided printing, and the speed of the transport motor 35 is controlled by the paper transport position. The switching between the forward and reverse rotations of the transport motor 49 and the forward and reverse rotation of the reverse motor 44 are performed.

The condition that the registration roller pair 17 in the apparatus main body 1 conveys the recording paper to the transfer roller 12 side is determined by the sensor 1
Third, the sensor 36 and the sensor 38 do not detect the recording paper. Then, the operation of the transport motor 35 arranged in the paper passing section 5 is started in response to the operation of the registration sensor 11 arranged in front of the registration roller pair 17 of the apparatus main body 1. Then, gradually increase the rotation speed.
Slow-up control for shifting to low-speed rotation (linear speed of 163 mm / sec) is performed over 5 seconds. As a result, it is possible to prevent skew in the sheet reversing unit 2, that is, non-uniformity of the sheet feeding function due to twisting or bending at the time of starting the transport member.

Therefore, when the apparatus main body 1 starts printing, the paper reversing unit 2 enters an operable standby state. When the trailing edge of the recording paper on which the image has been transferred to one side is detected by the sensor 13 disposed downstream of the pair of fixing rollers 18, the transport motor 35 rotates at a timing at which the trailing edge comes off the pair of transport rollers 19. (Linear speed 282 mm / sec)
When it is detected that the trailing edge of the recording paper has reached the sensor 36, the rotation is switched to the low-speed rotation in a standby state, and the recording paper corresponding to the next recording paper is transmitted.

When the trailing edge of the next recording sheet is detected by the sensor 13, the rotation is switched from low-speed rotation to high-speed rotation. As described above, the transport motor 35 is switched from the low speed to the high speed in synchronization with the end of fixing of the recording paper, and is controlled so as to immediately transport the recording paper to the reversing unit 26.

On the other hand, after the sensor 42 in the reversing unit 26 detects the transferred recording paper in the conveyance path 70, the sensor 42 in the conveyance path 70 waits until the leading end of the recording paper is detected by the sensor 11. The end is configured to escape the detection area of the sensor 42.

By the time the sensor 36 detects the leading edge of the recording paper in the paper passing unit 5, the rotation speed of the motor 49 reaches a high speed, and when the transfer paper reaches the transport roller pair 37, the rotation speed is high. Done.

Therefore, the leading end of the recording paper that has passed the sensor 36 enters the conveying path 69 at a high speed, and the conveying roller pair 3
When the sensor 38 detects between 7 and 39 and the leading edge of the recording paper is detected by the sensor 38, the motor 44 starts high-speed forward rotation. Further, after the leading edge of the recording paper is detected by the sensor 40, the sensor is detected by the sensor 42, and the trailing edge of the recording paper is detected by the sensor 4.
The motor 49 and the motor 4
4 stops. At that time, the transport rollers 41A and 41A
B stops with the recording paper sandwiched.

The motor 49 and the motor 49 are provided on condition that the preceding recording paper is conveyed by the registration roller 17 and the recording paper is not conveyed from the conveyance path 71, and that the leading end of the recording paper is not detected by the sensor 36. Motor 4
4 is reversed and re-fed to the apparatus main body 1. At this time, the number of steps of the motor 44 is counted at the same time as the reverse rotation of the motor 44, and the motor 49 is rotated in the reverse direction until the rear end of the re-fed recording paper is out of the drive range of the transport rollers 41A and 41B. Stop. Note that the motor 49 may be stopped at a timing when the rear end of the recording paper is out of the driving range of the tension roller 43. In this state, the motor 49 can rotate forward to enter a state of receiving the recording paper in the paper passing unit 5. Therefore, it is desirable that the tension roller 43 is located at the left end of the transport path 70 as much as possible.

Further, even if the motor 49 is conveying the recording paper and the trailing end of the recording paper loses the detection of the sensor 36, the conveyance path 7
When the recording paper at 0 does not fall out of the holding area of the transport roller pair 41, the motor 49 stops and the recording paper is made to wait in the transport path 69. When the sensor 42 detects the trailing edge of the recording sheet and rotates until the recording sheet moves out of the holding area of the conveying roller pair 41, the motors 49 and 44 rotate forward and a new rotation The recording paper will be conveyed. A discharge roller 46 connected to a discharge motor 45
Uses a nip of a roller to perform registration when re-feeding the sheet into the apparatus main body 1.

[0045]

As described above, according to the present invention, since the upright portion of the unit body has an L-shaped cross section and communicates with the discharge port, communication with the sheet reversing unit, the discharge unit or the sorter is established. Since the recording paper may be discharged from the rear surface of the apparatus main body, it is not necessary to increase the length of the apparatus main body in accordance with the length of the unit body, and a compact apparatus main body is provided. In addition, an internal cassette is arranged at an upper part of an electric control device arranged at a lower part in the apparatus main body, and a rear end of the internal cassette is stored in an upright portion of the L-shaped unit, thereby installing the apparatus main body. Space is small.

Also, since a transport path is formed that can be transported below the built-in cassette by bypassing the rear end of the built-in cassette, the distance from the base to the outlet can be increased, and the distance from the outlet can be increased. A transport path for the recording paper to the base side can be formed without abrupt direction change. Further, the transport path can be formed in an arc shape with the built-in cassette interposed therebetween, and the arc can be formed large, so that the friction between the transport path wall surface and the recording paper can be reduced and the recording paper can be transported smoothly.

Further, a drive motor for driving a conveying roller and a discharge roller which are arranged with the built-in cassette in the upright portion interposed therebetween can be arranged at a portion corresponding to the side surface of the built-in cassette. With the same setting, the rotational torque does not shift to one side, and a rational design can be realized. It has a remarkable effect.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of an image forming apparatus including a sheet reversing device according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is an explanatory diagram illustrating a state in which an image forming apparatus main body, a sheet reversing unit, and a sheet feeding unit are stacked and arranged.

FIG. 4 is a perspective view showing a rear end portion of the apparatus main body.

FIG. 5 is a perspective view showing a transport unit.

FIG. 6 is an explanatory diagram illustrating a state in which cords connected to the apparatus main body are extended outside via an L-shaped unit.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Image forming apparatus main body 2 Paper reversing unit 4 Controller (electric control part) 5 Paper passing part (standing part) 6 Paper cassette (built-in cassette) 26 Reversing part (base part)

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[Procedure amendment]

[Submission date] July 23, 1999

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0001

[Correction method] Change

[Correction contents]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus in which various units for conveying recording paper to the apparatus main body below the image forming apparatus main body are provided independently of the apparatus main body and stacked, and in particular, an L-shaped unit. And an image forming apparatus using the same.

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction contents]

[0006]

An image forming apparatus according to the present invention is capable of forming an image by supplying a recording sheet by itself to the main body of the image forming apparatus (apparatus main body). It is assumed that they are provided independently of the main body and stacked. The various units include a sheet reversing unit on which images are transferred to both sides, a sheet feeding unit for forming a large number of images, a sheet discharging unit for stacking recorded sheets, a sorter, and the like.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Change

[Correction contents]

In the apparatus main body side, a recording paper discharge port is provided on the rear side, and the rear end of the built-in cassette is mounted so as to protrude from the rear side, and the unit body is mounted from the front side of the apparatus main body. A cross section L having a base longer than the device main body in the direction of the rear surface and on which the device main body is mounted, and a rising portion standing up from the base along the rear surface of the device main body and communicating with the discharge port. The upright portion is formed in a character shape, and a conveying path for conveying the recording paper to the base portion from the contact surface with the rear surface of the apparatus main body to near the opposite side surface of the contact surface is provided. I do.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Akitake Miyoshi 3-9 Tamazuki Motomachi, Tennoji-ku, Osaka-shi, Osaka Inside Mita Techno Design Co., Ltd. (72) Inventor Masahiro Murakami 3rd Tamazomoto-cho, Tennoji-ku, Osaka No. 9 Mita Techno Design Co., Ltd.

Claims (5)

[Claims] 1. An image forming apparatus main body (hereinafter, apparatus main body)
And an image forming apparatus having a unit body that can be placed below the apparatus main body and that can receive transfer paper discharged from the apparatus main body, wherein the apparatus main body has a recording paper discharge port on a rear surface thereof, An electric control device is provided at a lower portion of the main body, and a detachable built-in cassette for storing recording paper is provided at an upper portion of the electric control device. The unit body is provided with the device in a direction from a front surface to a rear surface of the device main body. A base that is longer than the main body, on which the apparatus main body is placed, and an erect part that stands up from the base and communicates with the discharge port, is formed in an L-shaped cross section, and the erect part is the main body of the apparatus. An image forming apparatus, wherein a conveying path for conveying the recording paper from the contact surface with the rear surface to the surface opposite to the contact surface and conveying the recording paper to the base is provided. 2. The image forming apparatus according to claim 1, wherein the conveying path of the upright portion is formed in a substantially arc shape so as to convey the recording paper to the base. 3. The image according to claim 2, wherein a transport roller is provided on a transport path of the upright portion, and a rotation axis of a drive motor for rotating the transport roller is arranged on a side surface of the upright portion. Forming equipment. 4. The built-in cassette has a rear end protruding from a rear surface of the apparatus main body and can be mounted. The upright portion of the unit body forms a storage space for storing the rear end of the built-in cassette. 2. The image forming apparatus according to claim 1, wherein the conveying path of the upright portion is formed so as to convey the recording paper to the base portion, bypassing a rear end of the stored internal cassette. 5. A transport roller is provided on a transport path of the upright portion, and a rotation axis of a drive motor for rotating the transport roller is disposed at a portion corresponding to a side of the built-in cassette outside the storage space. The image forming apparatus according to claim 4, wherein