JPH06161170A - Transfer device - Google Patents

Abstract

PURPOSE:To provide a transfer device dissolving the fear of a cleaning, blade being damaged at the time of jam disposal. CONSTITUTION:A transfer device D1 is provided with a belt unit 6 and a cleaning device 8. The belt unit 6 is formed being provided with a transfer roller 2, a driving roller 3, a driven roller 5 and a transfer belt 4. The cleaning device 8 is provided with a cleaning blade 9 and a pressing roller 18. When a lever 17 is rotated clockwise at the time of a jam being generated, the belt unit 6 is rotated downward around a horizontal rotary shaft 13. Then the transfer belt 4 is bent downward at the pressure contact place with the pressing roller 18, and the cleaning blade 9 is brought into pressure contact with the outer face of the transfer belt 4, with the pressure contact force of the same grade as that before the rotation of the belt unit 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer device, and more specifically, it is incorporated in an image forming apparatus such as a copying machine or a printer, and a toner image after development on a photosensitive member is placed on a transfer belt and supplied. The present invention relates to a transfer device of a type in which transfer is performed on a transfer paper at a position between a photoconductor and a transfer belt.

[0002]

2. Description of the Related Art Conventionally, as a transfer device of this type, FIG.
Have been proposed. That is, the transfer device includes a transfer roller 52 arranged immediately below the drum-shaped photosensitive member 51, a driving roller 53 arranged on the right side of the transfer roller 52, and a constant distance to the left side of the transfer roller 52. It is endlessly rotatably stretched over the drive roller 53 and the driven roller 55 via the driven roller 55 and the transfer roller 52, which are arranged in contact with the photoconductor 51 by the transfer roller 52. And a transfer belt 54.

The transfer belt 54 is made of polyurethane rubber or the like. The developed toner image on the photoconductor 51 is transferred to the transfer paper P placed on the transfer belt 54 and supplied, at a portion sandwiched between the photoconductor 51 and the transfer belt 54.

A developing device 56 containing developing toner is disposed above the driving roller 53. Developing device 5
The developing sleeve 57 in 6 is in contact with the photoconductor 51. Below the transfer belt 54, a cleaning device 58 forming a part of the transfer device is arranged. The cleaning device 58 includes a cleaning blade 59, and the cleaning blade 59 removes dirt due to untransferred toner from the outer surface of the transfer belt 54.

In such a transfer device, when used by being incorporated in an image forming device such as a copying machine or a printer, it is provided with a transfer roller 52, a driving roller 53, a driven roller 55 and a transfer belt 54. The part (belt device part) and the cleaning device 58 part were used as an integrated transfer unit.

When such an integrated transfer unit is used, it is necessary to remove the transfer paper P when a trouble (jam) that the transfer paper P is clogged occurs. Therefore, the integrated transfer unit uses the rotation shaft 60 provided coaxially with the center axis of the driven roller 55 as the rotation center to form the transfer belt 5.
4 is configured so that the integrated transfer unit can be rotated downward from the state where the photosensitive drum 51 and the photosensitive member 51 are in contact with each other. When a jam occurs, the integrated transfer unit is manually rotated downward to move the transfer belt 54 to the photosensitive member 51.
Keep away from.

When such an integral transfer unit is used,
Since the weight ratio of the cleaning device 58 is relatively large, the weight of the entire unit becomes large, and a strong force is required when the integrated transfer unit is rotated (raised) upward after the jam processing. Further, when the integrated transfer unit is rotated, the cleaning device 58 is also rotated, so that a large space is required inside the image forming device, and the image forming device cannot be increased in size.

Therefore, instead of such an integral transfer unit, the cleaning device 58 is separated and the same is fixed inside the image forming apparatus, and only the above belt device part is unitized (belt transfer unit). Unit) has become widely used.

That is, the belt unit has a rotating shaft 60.
With the center of rotation as the center of rotation, the belt unit can be rotated downward from the state where the transfer belt 54 and the photoconductor 51 are in contact with each other. When a jam occurs, the belt unit is manually rotated downward to separate the transfer belt 54 from the photoconductor 51.

[0010]

However, when jamming is performed using such a belt unit, as shown in FIG. 16, the jamming unit does not move downward with the rotating shaft 60 as the center of rotation. It is rotated. The transfer belt 54 includes the blade body 59a and the blade body 59.
The blade body 59a of the cleaning blade 59 including the stay portion 59b adhered to a and the stay portion 59b and the support portion 59c screwed together is strongly pressed downward. Then, a large load is applied to the bonded portion between the blade main body 59a and the stay portion 59b, and the cleaning blade 59 may be damaged from the bonded portion.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a transfer device capable of preventing the cleaning blade from being damaged during jam processing.

[0012]

Means for Solving the Problem and Its Action The transfer device according to the present invention has the following four modes. A first form thereof is a transfer roller arranged near the photoconductor, a driving roller arranged on one side of the transfer roller, and a driven roller arranged on the other side of the transfer roller, A belt unit having a transfer belt that is endlessly rotatably wound around a driving roller and a driven roller via a transfer roller and is pressed against the photoconductor by the transfer roller, and a belt below the belt unit. And a cleaning device having a cleaning blade that is provided separately from the unit and is pressed against the outer surface of the transfer belt to remove dirt on the outer surface, and the belt unit has a horizontal rotation shaft provided at one end thereof. It is rotatable up and down as a center of rotation, the cleaning device is fixed, and the cleaning blade of the cleaning device is fixed. On the opposite side of the horizontal rotary shaft of the to the belt unit,
A transfer comprising a pressing roller that presses the transfer belt upward when the belt unit rotates downward, thereby keeping the pressing force of the cleaning blade against the transfer belt substantially constant before and after the rotation. It is a device.

That is, in the first transfer device, the belt unit is vertically rotatable about a horizontal rotation shaft provided at one end thereof as a rotation center, and is pressed against the outer surface of the transfer belt so that the outer surface thereof is pressed. A cleaning device having a cleaning blade for removing dirt is fixedly provided separately from the belt unit, and is further pressed through the cleaning blade of the cleaning device to the side opposite to the horizontal rotation shaft of the belt unit. The point is that a roller is provided. Then, when the belt unit is rotated downward, the transfer roller is pressed upward by the pressing roller so that the pressing force of the cleaning blade to the transfer belt is kept substantially constant before and after the rotation. And

A second aspect of the present invention is a transfer roller arranged so as to be displaced by a separating member in the vicinity of the photoconductor,
A driving roller arranged on one side of the transfer roller,
The driven roller, which is arranged on the other side of the transfer roller, is endlessly rotatably passed over the drive roller and the driven roller via the transfer roller, and can be separated from and brought into contact with the photoconductor by the displacement of the transfer roller. A cleaning having a belt unit having a transfer belt to be pressure-contacted and a cleaning blade provided below the belt unit separately from the belt unit and being pressed against the outer surface of the transfer belt to remove dirt on the outer surface. The belt unit and the cleaning device are fixed respectively, and when the separating / contacting member separates the transfer belt from the photoconductor due to the displacement of the transfer roller, the transfer belt is moved upward by the displacement. Pressing roller, thereby releasing the pressure contact of the cleaning blade with the transfer belt. It is a device.

That is, the second transfer device has a belt unit having a transfer roller arranged so as to be displaced by a separating member in the vicinity of the photoconductor, and is pressed against the outer surface of the transfer belt to stain the outer surface. The gist is that a cleaning device having a cleaning blade to be removed is provided separately and fixedly together, and further, a releasing roller is provided at the separating / contacting member. Then, when the transfer belt is separated from the photoconductor by the displacement of the transfer roller, the releasing roller presses the transfer belt upward in association with the displacement of the photosensitive member, thereby attempting to release the pressure contact of the cleaning blade with the transfer belt. To do.

According to a third aspect of the present invention, a transfer roller disposed near the photoconductor, a drive roller disposed on one side of the transfer roller, and a transfer roller disposed on the other side of the transfer roller. Via the driven roller and the transfer roller, the roller is driven endlessly to the drive roller and the driven roller,
A belt unit having a transfer belt that is pressed against the photoconductor by a transfer roller and a belt unit below the belt unit are provided separately from each other, and are pressed against the outer surface of the transfer belt to remove dirt on the outer surface. And a cleaning device having a cleaning blade for removal, the belt unit is rotatable up and down about a horizontal rotation shaft, the cleaning device is fixed, and the cleaning blade of the cleaning device is further provided. Is a transfer device in which a linear portion pressed against the outer surface of the transfer belt is arranged so as to be coaxial with the horizontal rotation axis of the belt unit.

That is, the third transfer device allows the belt unit to rotate up and down about the horizontal rotation axis as the center of rotation, and also has a cleaning blade that is pressed against the outer surface of the transfer belt to remove dirt on the outer surface. A cleaning device having a cleaning device is provided separately from the belt unit and fixed, and the cleaning blade of the cleaning device is arranged such that the straight line portion of the cleaning blade that is pressed against the outer surface of the transfer belt is coaxial with the horizontal rotation axis of the belt unit. The summary is that it is arranged in. Then, when the belt unit rotates downward, the pressing force of the cleaning blade to the transfer belt is kept to be substantially the same as that before the rotation.

According to a fourth aspect of the present invention, a transfer roller disposed near the photoconductor, a drive roller disposed on one side of the transfer roller, and a transfer roller disposed on the other side of the transfer roller. Via the driven roller and the transfer roller, the roller is driven endlessly to the drive roller and the driven roller,
A belt unit having a transfer belt that is pressed against the photoconductor by a transfer roller and a belt unit below the belt unit are provided separately from each other, and are pressed against the outer surface of the transfer belt to remove dirt on the outer surface. A cleaning device having a cleaning blade for removing the belt unit is provided, and the belt unit is vertically rotatable about a horizontal rotation shaft provided at one end thereof as a rotation center, and
The cleaning blade of the cleaning device is rotatable up and down. Furthermore, the cleaning blade is provided in the vicinity of the cleaning device, and the cleaning blade is rotated downwards in conjunction with the downward rotation of the belt unit, whereby transfer is performed. The transfer device is provided with a releasing member that releases the pressure contact of the cleaning blade with the belt.

That is, the fourth transfer device is capable of vertically rotating the belt unit about a horizontal rotation axis as a rotation center, and is also a cleaning blade which is pressed against the outer surface of the transfer belt to remove dirt on the outer surface. The gist of the present invention is that the cleaning device having the above is provided separately from the belt unit, the cleaning blade of the cleaning device is vertically rotatable, and the releasing member is provided near the cleaning device. Then, the release member is operated to rotate the cleaning blade downward, and when the transfer belt is separated from the photoconductor, the pressure contact of the cleaning blade with the transfer belt is released.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to four embodiments shown in the drawings. The present invention is not limited to these.

Embodiment 1 In FIG. 1, a transfer device D ₁ incorporated in a copying machine is
The belt unit 6 and a cleaning device 8 provided below the belt unit 6 separately from the belt unit 6 are provided. The belt unit 6 includes a transfer roller 2 and a transfer roller 2 that are disposed directly below the drum-shaped photosensitive member 1.
From the transfer roller 2 at a predetermined distance in the horizontal right direction from the transfer roller 2, the driven roller 5 provided at a predetermined distance in the horizontal left direction from the transfer roller 2, and the drive roller via the transfer roller 2. 3 and a driven roller 5 so as to be endlessly rotatable, and have a transfer belt 4 pressed against the photoconductor 1 by the transfer roller 2.

The belt unit 6, as shown in FIG.
The transfer roller 2, the driving roller 3, the driven roller 5, and the rotation shafts of these rollers are integrated by the front side plate 15 and the rear side plate 16. The transfer belt 4 is a conductive belt body obtained by kneading polyurethane rubber and carbon and coated with a fluororesin. The toner image after development on the photoconductor 1 is transferred onto the transfer paper placed on the transfer belt 4 and is transferred onto the photoconductor 1 and the transfer belt 4.
It is transcribed at the place between and. Cleaning device 8
Is fixed to the bottom plate 14 of the copying machine. Further, it has a cleaning blade 9 which is pressed against the outer surface of the transfer belt 4 to remove dirt (untransferred toner etc.) on the outer surface.

The belt unit 6 has a horizontal rotation shaft 13 at the left end thereof. In addition to the cleaning blade 9, the cleaning device 8 has a blade support plate 11 that supports the cleaning blade 9 via a blade stay 10 so as to be rotatable left and right. The cleaning blade 9 and the blade stay 10 are bonded by an adhesive. The blade stay 10 and the blade support plate 11 are
It is fixed by a fixing pin 12.

In FIG. 1, the photosensitive member 1 rotates clockwise. Further, the transfer roller 2, the driving roller 3, the driven roller 5, and the transfer belt 4 rotate counterclockwise.
The cleaning device 8 further includes a cleaning blade 9
To the side opposite to the horizontal rotation shaft 13 via the pressing roller 1
Eight.

The belt unit 6 is vertically rotatable about a horizontal rotation shaft 13. That is,
In the belt unit 6, the transfer belt 4 is in pressure contact with the photoconductor 1 in a state in which a unit separating / contacting lever 17 rotatably provided below the belt unit 6 is erected vertically. When the lever 17 is rotated in the arrow direction (clockwise direction) in FIG. 1, the stopper 19 which is integrated with the lever 17 and is horizontal contacts the bottom plate 14 as shown in FIG. Then, the belt unit 6 rotates downward by its own weight with the horizontal rotation shaft 13 as the rotation center. And the transfer belt 4
Is separated from the photoconductor 1, and the belt unit 6 is supported by the upper edge of the inclined lever 17.

The pressing roller 18 is in very slight contact with the outer surface of the transfer belt 4 as shown in FIG. 3, before the belt unit 6 is rotated downward, that is, when the transfer is normally performed. At this time, the cleaning blade 9
Is pressed against the outer surface of the transfer belt 4 with a predetermined pressure contact force to remove dirt on the outer surface.

The pressing roller 18 is rotated when the belt unit 6 is rotated downward, that is, when the belt unit 6 is manually rotated downward when a jam occurs and the transfer belt 4 is separated from the photosensitive member 1. Is strongly pressed against the outer surface of the transfer belt 4 as shown in FIG. At this time, the transfer belt 4
Has a pressing roller 18, and is bent downward at a position where it is pressed against the pressing roller 18. Then, the cleaning blade 9 is brought into pressure contact with the outer surface of the transfer belt 4 with the same pressure contact force as before the rotation of the belt unit 6.

As described above, the pressing roller 18 presses the transfer belt 4 upward when the belt unit 6 is rotated downward, whereby the pressing force of the cleaning blade 9 to the transfer belt 4 is increased. Keep almost constant before and after turning.

In this transfer device D ₁ , the belt unit 6 is rotatable as described above, and
Since the cleaning device 8 is fixed to the bottom plate 14 of the copying machine as described above, the pressing roller 18 presses the transfer belt 4 upward when the belt unit 6 is rotated downward. Then, the pressing roller 18 is the transfer belt 4
The pressure contact force of the cleaning blade 9 with respect to is kept substantially constant before and after the rotation. Therefore, in the copying machine in which the transfer device D ₁ is incorporated, it is possible to prevent the cleaning blade 9 from being damaged when the jam processing is performed.

Embodiment 2 In FIG. 6, the transfer device D ₂ incorporated in the copying machine is
A belt unit 26 and a cleaning device 28 provided below the belt unit 26 and provided separately from the belt unit 26 are provided. The belt unit 26 is provided directly below the photoconductor 1 at the right end of the roller supporting plate 20 as a separating / contacting member, and is provided so as to be vertically displaced by the rotation of the roller supporting plate 20, and a transfer roller 22. 22. A driving roller 3 disposed at a predetermined distance in the horizontal right direction from 22; a driven roller 5 disposed at a predetermined distance in the horizontal left direction from the transfer roller 22; The transfer belt 4 is wound around the roller 3 and the driven roller 5 in an endless manner so that the transfer roller 22 is displaced so as to come into contact with and separate from the photoconductor 1.
To have.

In the belt unit 26, as shown in FIG. 7, the transfer roller 22, the driving roller 3, the driven roller 5 and the rotation shafts of these rollers are integrated by a front side plate 31 and a rear side plate 32. There is. The front side plate 31 is fixed to the front plate 21 of the copying machine, and the rear side plate 32 is the rear plate 25 of the copying machine.
It is fixed to. The cleaning device 8 is fixed to the bottom plate 14 of the copying machine. The cleaning device 8 has a cleaning blade 9, a blade stay 10, and a blade support plate 11.

One roller support plate 20 is provided on each of the front side and the rear side of the belt unit 26. Each roller support plate 20 is provided with a releasing roller 27 at the left end and a horizontal rotating shaft 23 in the center. Then, the roller support plate 20 rotates up and down about the horizontal rotation shaft 23 as a rotation center. This turning operation is performed by turning on / off a solenoid 24 connected between the right end of the front roller support plate 20 and the horizontal turning shaft 23. Note that FIG.
In the figure, 29 is a coil spring for urging the left end of the front roller support plate 20 downward.

The releasing roller 27 contacts the outer surface of the transfer belt 4 very lightly before the roller supporting plate 20 is rotated, that is, when the transfer is normally performed, as shown in FIG. At this time, the cleaning blade 9 is pressed against the outer surface of the transfer belt 4 with a predetermined pressure contact force to remove dirt on the outer surface.

The releasing roller 27 is provided on the roller supporting plate 2 when the roller supporting plate 20 is rotated, that is, when a jam occurs.
0 is rotated by the solenoid 24 to transfer the transfer belt 4
When is separated from the photoconductor 1, the transfer belt 4 is pressed upward as shown in FIG. Then, the transfer belt 4 separates from the cleaning blade 9, and the pressure contact of the cleaning blade 9 with the transfer belt 4 is released.

In this transfer device D ₂ , as described above, the belt unit 6 has the front side plate 31 fixed to the front plate 21 of the copying machine and the rear side plate 32 fixed to the rear plate 25 of the copying machine.
Since the cleaning device 8 is fixed to the bottom plate 14 of the copying machine as described above, the release roller 27 is rotated when the roller support plate 20 is rotated.
Presses the transfer belt 4 upward to separate the transfer belt 4 from the cleaning blade 9. Therefore, in the copying machine in which the transfer device D ₂ is incorporated, it is possible to prevent the cleaning blade 9 from being damaged when the jam processing is performed.

Embodiment 3 In FIG. 9, the transfer device D ₃ incorporated in the copying machine is
A belt unit 36 and a cleaning device 28 provided below the belt unit 36 and provided separately from the belt unit 36 are provided. The belt unit 36 includes a transfer roller 2, a driving roller 3, a driven roller 5, and a transfer belt 4.

As shown in FIG. 10, the belt unit 36 includes a transfer roller 2, a driving roller 3, and a driven roller 5.
And the rotation axes of these rollers are the front side plate 33 and the rear side plate 3.
It is integrated with 4. The cleaning device 28 is fixed to the bottom plate 14 of the copying machine, and has a cleaning blade 9, a blade stay 10, and a blade support plate 11.

The belt unit 36 is the front plate 21 of the copying machine.
And horizontal pivots 35, 35 attached to the rear plate 25
It can be rotated up and down around the center of rotation. Also,
The cleaning blade 9 of the cleaning device 28 is arranged such that the linear portion 9a that is pressed against the outer surface of the transfer belt 4 is coaxial with the horizontal rotation shafts 35 of the belt unit 36.

Therefore, in the belt unit 36, the transfer belt 4 is in pressure contact with the photosensitive member 1 when the unit separating / contacting lever 17 rotatably provided below the belt unit 36 is erected vertically. Then, when the lever 17 is rotated in the arrow direction (clockwise direction) of FIG. 9, the stopper 19 which is integrated with the lever 17 and is horizontal contacts the bottom plate 14 as shown in FIG. 11. Then, the belt unit 36 rotates downward due to its own weight around the horizontal rotation shafts 35, 35. Then, the transfer belt 4 separates from the photoconductor 1,
The belt unit 36 is supported by the upper edge of the inclined lever 17.

With this structure, the belt unit 3
When 6 rotates up and down, the transfer belt 4 rotates up and down with the linear portion 9 of the cleaning blade 9 as the center of rotation while contacting only the linear portion 9. Therefore, the cleaning blade 9 is pressed against the outer surface of the transfer belt 4 even when the belt unit 36 is rotated downward when a jam occurs, with a pressure contact force of substantially the same magnitude as before the rotation.

In this transfer device D ₃ , the belt unit 36 is rotatable about the horizontal rotation shafts 35, 35 as described above, and the cleaning blade 9 of the cleaning device 28 is fixed. The straight line portion 9a
Are arranged so as to be coaxial with the horizontal rotation shafts 35, 35, so that when the belt unit 36 is rotated downward, the cleaning blade 9 has a pressure contact force of substantially the same magnitude as before rotation. It is pressed against the outer surface of the transfer belt 4. Therefore, in the copying machine in which the transfer device D ₁ is incorporated, it is possible to prevent the cleaning blade 9 from being damaged when the jam processing is performed.

Embodiment 4 In FIG. 12, a transfer device D incorporated in a copying machine.
_The belt unit 6 includes a belt unit 6 and a cleaning device 38 provided below the belt unit 6 and separately from the belt unit 6. The belt unit 6 includes a transfer roller 2, a driving roller 3, a driven roller 5, and a transfer belt 4.

As shown in FIG. 13, the belt unit 6 includes a transfer roller 2, a driving roller 3, and a driven roller 5.
The rotation axes of these rollers are the front side plate 15 and the rear side plate 1.
It is integrated with 6. The belt unit 6 also includes a horizontal rotation shaft 13 at the left end thereof. The cleaning device 38 is fixed to the bottom plate 14 of the copying machine. The cleaning device 38 has a cleaning blade 9 and a blade support plate 39. The cleaning blade 9 and the blade support plate 39 are bonded with an adhesive. Further, the blade support plate 39 is vertically rotatable about the lower edge of the blade support plate 39. Therefore, the cleaning blade 9 is vertically rotatable.

A releasing member 40 is provided on the front side of the cleaning device 38. The releasing member 40 is hung over the unit separating / connecting lever 17 and the lever 17 and the blade supporting plate 39 to connect the both.
1 and a stopper 19 integrated with the lever 17.

The belt unit 6 is vertically rotatable about a horizontal rotation shaft 13. That is,
In the belt unit 6, the transfer belt 4 is in pressure contact with the photoconductor 1 when the lever 17 is vertically erected. When the lever 17 is rotated in the arrow direction (clockwise direction) of FIG. 12, the stopper 19 moves the bottom plate 1 as shown in FIG.
Abut 4. Then, the belt unit 6 rotates downward by its own weight with the horizontal rotation shaft 13 as the rotation center. Then, the transfer belt 4 separates from the photoconductor 1 and the belt unit 6 is supported by the upper edge of the inclined lever 17.

At this time, the connecting plate 41 is moved to the right by the movement of the lever 17, and the blade supporting plate 39 is rotated downward. As a result, the cleaning blade 9 separates from the transfer belt 4.

In this transfer device D ₄ , as described above, the belt unit 6 is rotatable as described above, and the cleaning blade 9 of the cleaning device 38 is connected to the lever 17 and the connecting plate 41. Since it can be rotated up and down by the cleaning unit, the cleaning blade 9 moves the transfer belt 4 when the belt unit 6 is rotated downward.
The pressure contact is released away from. Therefore, in the copying machine in which the transfer device D ₄ is incorporated, it is possible to prevent the cleaning blade 9 from being damaged when the jam processing is performed.

[0048]

Since the transfer device according to the first to fourth aspects of the present invention is configured as described above, in the image forming apparatus incorporating such a transfer device, the jam processing is performed. When doing so, it is possible to prevent the cleaning blade from being damaged.

[Brief description of drawings]

FIG. 1 is an overall configuration explanatory view of a state in which a transfer device according to a first exemplary embodiment of the present invention is in contact with a photoconductor when viewed from the front.

FIG. 2 is an overall configuration explanatory view of a state where the transfer device is in contact with a photoconductor as seen from a plane.

FIG. 3 is an explanatory view of a main part configuration showing a state of a transfer belt when the transfer device is in contact with a photoconductor.

FIG. 4 is an overall configuration explanatory view of a state in which the transfer device is separated from a photoconductor when viewed from the front.

FIG. 5 is an explanatory view of a main part configuration showing a state of a transfer belt when the transfer device is separated from a photoconductor.

FIG. 6 is an overall configuration explanatory view of a state in which a transfer device according to a second exemplary embodiment of the present invention is in contact with a photoconductor, as viewed from the front.

FIG. 7 is an overall configuration explanatory view of a state in which the transfer device is in contact with a photoconductor as seen from a plane.

FIG. 8 is an overall configuration explanatory view of a state where the transfer device is separated from a photoconductor when viewed from the front.

FIG. 9 is an overall configuration explanatory view of a state in which a transfer device according to a third exemplary embodiment of the present invention is in contact with a photoconductor when viewed from the front.

FIG. 10 is an overall configuration explanatory view of a state in which the transfer device is in contact with a photoconductor as seen from a plane.

FIG. 11 is an overall configuration explanatory view of a state where the transfer device is separated from a photoconductor when viewed from the front.

FIG. 12 is an explanatory diagram of the overall configuration of a transfer device according to a fourth exemplary embodiment of the present invention, which is in contact with a photoconductor when viewed from the front.

FIG. 13 is an overall configuration explanatory view of a state in which the transfer device is in contact with a photoconductor as seen from a plane.

FIG. 14 is an overall configuration explanatory view of a state in which the transfer device is separated from a photoconductor when viewed from the front.

FIG. 15 is an overall configuration explanatory view of a state in which a conventional transfer device is in contact with a photoconductor when viewed from the front.

FIG. 16 is an overall configuration explanatory view of a state in which the transfer device is separated from a photoconductor when viewed from the front.

[Explanation of symbols]

 1 Photoconductor 2 Transfer Roller 3 Drive Roller 4 Transfer Belt 5 Driven Roller 6 Belt Unit 7 Drive Motor 8 Cleaning Device 9 Cleaning Blade 13 Horizontal Rotation Shaft 17 Lever 18 Pressing Roller 20 Separation Member 23 Horizontal Rotation Shaft 24 Solenoid 26 Belt unit 27 Release roller 28 Cleaning device 35 Horizontal rotation shaft 36 Belt unit 38 Cleaning device 40 Release member 41 Connecting plate

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yuki Ito 1-2-2 Tamatsukuri, Chuo-ku, Osaka Mita Engineering Co., Ltd.

Claims (4)

[Claims] 1. A transfer roller disposed near the photoconductor,
A driving roller arranged on one side of the transfer roller,
A transfer belt is provided on the other side of the transfer roller, and a transfer belt is endlessly rotatably stretched over the drive roller and the driven roller via the transfer roller and is pressed against the photoconductor by the transfer roller. A belt unit having a belt unit and a cleaning device provided below the belt unit as a separate body from the belt unit and having a cleaning blade that is pressed against the outer surface of the transfer belt to remove dirt on the outer surface; The unit is vertically rotatable about a horizontal rotation shaft provided at one end thereof as a rotation center, the cleaning device is fixed, and a belt unit is provided via a cleaning blade of the cleaning device. The transfer belt to the side opposite to the horizontal rotation axis of the , The transfer device comprising comprising a pressing roller maintained substantially constant before and after it by a cleaning blade contact pressure of the rotation of the transfer belt. 2. A transfer roller arranged near the photosensitive member so as to be displaced by a separating member, a driving roller arranged on one side of the transfer roller, and a driving roller arranged on the other side of the transfer roller. A transfer belt that is endlessly rotatably stretched over the driven roller and the driven roller through the driven roller and the transfer roller, and is press-contacted to the photoconductor by the displacement of the transfer roller. And a cleaning device that is provided below the belt unit as a separate body from the belt unit and has a cleaning blade that is pressed against the outer surface of the transfer belt to remove dirt on the outer surface. Each of the devices is fixed, and when the separating / contacting member separates the transfer belt from the photosensitive member due to the displacement of the transfer roller, Pressing the transfer belt in conjunction with the position upward, the transfer device comprising comprising a releasing roller to release the pressure of the cleaning blade to the transfer belt by it. 3. A transfer roller disposed near the photoconductor,
A driving roller arranged on one side of the transfer roller,
A transfer belt is provided on the other side of the transfer roller, and a transfer belt is endlessly rotatably stretched over the drive roller and the driven roller via the transfer roller and is pressed against the photoconductor by the transfer roller. A belt unit having a belt unit and a cleaning device provided below the belt unit as a separate body from the belt unit and having a cleaning blade that is pressed against the outer surface of the transfer belt to remove dirt on the outer surface; The unit is vertically rotatable about a horizontal rotation axis, and the cleaning device is fixed. Further, the cleaning blade of the cleaning device is
A transfer device in which a linear portion pressed against the outer surface of the transfer belt is arranged coaxially with the horizontal rotation axis of the belt unit. 4. A transfer roller disposed near the photoconductor,
A driving roller arranged on one side of the transfer roller,
A transfer belt is provided on the other side of the transfer roller, and a transfer belt is endlessly rotatably stretched over the drive roller and the driven roller via the transfer roller and is pressed against the photoconductor by the transfer roller. A belt unit having a belt unit and a cleaning device provided below the belt unit as a separate body from the belt unit and having a cleaning blade that is pressed against the outer surface of the transfer belt to remove dirt on the outer surface; The unit is vertically rotatable about a horizontal rotation shaft provided at one end of the unit, and the cleaning blade of the cleaning device is vertically rotatable. Is provided in the vicinity of and rotates the cleaning blade downwards in conjunction with the downward rotation of the belt unit. Transfer device comprising comprising a releasing member for releasing the pressure contact of the cleaning blade to the transfer belt by it.