JP3327380B2 - Image forming device - Google Patents

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, and more particularly, to a structure in which waste toner removed from a photosensitive drum can be transferred to a toner collecting section located above the photosensitive drum by a belt conveyor. To an image forming apparatus.

[0002]

2. Description of the Related Art Conventionally, an image forming apparatus in which waste toner removed from a photosensitive drum can be transported to a toner collecting section located above the photosensitive drum by a belt transporter is disclosed in Japanese Unexamined Patent Application Publication No. H10-204873. -116868.

In this image forming apparatus, a cleaning blade scrapes off residual toner attached to a photosensitive drum, and waste toner removed from the photosensitive drum is transported to a transport mechanism by rotating a spiral spiral blade. Is done.

The waste toner collecting container is generally located above the photosensitive drum, that is, in consideration of easiness of replacement.
It is arranged in an upper part of the image forming apparatus. Therefore, a belt body that communicates with the waste toner collection container is provided in the transport mechanism, and the belt body is configured to collect the waste toner in the waste toner collection container.

[0005] In the prior art constructed as described above, in order to prevent the waste toner from scattering in the apparatus and adversely affecting the image forming mechanism, the outer periphery of the spiral blade for transporting the waste toner to the transport mechanism is formed. While being covered with a cylindrical portion, the entrance opening of the transport mechanism and the cylindrical portion are fitted so that the waste toner does not scatter in the machine, or the entrance opening and the cylindrical portion are connected via packing or the like. Mechanism must be considered.

[0006] Due to the demand for downsizing of the body, it is not possible to form these waste toner conveying mechanisms in a dimension having a sufficient margin.

[0007]

Therefore, according to the above-mentioned prior art, the residual toner scraped off by the cleaning blade is conveyed while being pushed by the spiral blade. Then, in the vicinity of the entrance of the transport mechanism, the circulation axis of the belt body is disposed at a position coinciding with the axis of the spiral blade, and the bottom surface near the entrance of the transport mechanism is close to the entrance opening, so that the spiral blade has The waste toner conveyed so as to be pushed is pushed in the conveying direction as it is, and is accumulated near the entrance.

Then, the waste toner remains in a portion outside the driving range of the driving member near the entrance and solidifies, and the solidified waste toner closes the entrance, the driving of the spiral blade stops, and finally the cleaning blade portion. Not only is the photoreceptor drum cleaning insufficient due to the full of waste toner,
There is a risk of damaging the surface of the photoconductor drum.

SUMMARY OF THE INVENTION In view of the above circumstances, an object of the present invention is to provide an image forming apparatus for preventing waste toner from remaining near an entrance and solidifying to block the entrance.

[0010]

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above problems, and has been made in consideration of the above circumstances .
Position above the lower circulation axis of the belt conveyor.
And the waste toner from the removing mechanism is self-weighted.
Can collide with the belt conveyor by the falling energy
And at the upper circulating shaft side of the belt conveyor.
Connect a drive source to obtain rotational driving force from the upper circulation shaft side.
Characterized in that the sea urchin configuration.

[0011] Further, the belt conveyor is moved in the direction of gravity.
And a large number of belt conveyors
A waste toner transfer chamber formed by separating the partition walls by a predetermined distance
The provision is also an effective means of the present invention.

In the image forming apparatus of the present invention, for example, as shown in FIG.
8 is a belt container 15 forming the waste toner transfer unit 11
And the waste toner 48 is circulated by a circulating belt carrier (belt) 45 disposed in the belt housing 15.
Is transportable to a toner collecting section located above the photosensitive drum.

The waste toner 48 from the photosensitive drum removing mechanism (not shown) is discharged from the opening 15b provided in the belt housing 15 to the belt transporting body 45 disposed below the opening 15b. In the toner transfer chamber 50,
Dropped by its own weight and transported. Therefore, even if a plurality of toner powders are solidified, they are loosened by falling due to their own weight, and solidification of waste toner is prevented as much as possible.

As described above, the present invention has a configuration in which the waste toner from the removing mechanism is transported to the waste toner transport chamber of the belt transport body with a drop, for example,
This includes all modes in which the belt transport body 45 is parallel to or intersects with the gravity line.

It is also an effective means of the present invention that the belt conveying member is disposed obliquely with respect to the direction of gravity so that the waste toner is directly received by the waste toner conveying chamber.

The belt conveyor is disposed obliquely with respect to the direction of gravity, and the waste toner is directly received in the waste toner transport chamber. For example, as shown in FIG. In addition to providing a waste toner transport path so that the toner transport direction is from the back surface to the front surface of the paper, it also includes transporting the waste toner from the right hand side in FIG.

With this configuration, the transfer chamber 5
The waste toner that has dropped to 0 is located in the transport chamber and rises from below. At that time, the waste toner collides with the waste toner that falls from the opening 15b, and the waste toner due to natural fall is loaded by the mutual kinetic energy. The particles are pulverized from each other with a greater impact force colliding with the waste toner.

[0018]

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 present invention, but are merely illustrative examples. It's just

An embodiment of the present invention will be described with reference to the drawings. FIG. 2 is a diagram illustrating a configuration of the image forming apparatus according to the embodiment of the present invention. 2, the image forming apparatus 1 includes a frame 1 on which a waste toner transfer unit 11 described later is placed.
An a-Si photosensitive drum rotating counterclockwise in FIG. 2 is disposed on the back surface of the photosensitive drum 2. A developing device 10, a transfer roller 19, and the photosensitive drum are arranged around the photosensitive drum along the rotating direction. A cleaning blade for cleaning, a charging unit, and the like are provided.

The developing device 10 is provided with a developing roller (not shown), and the surface of the developing roller is separated from the surface of the photosensitive member by a predetermined distance. The developing device 10 is configured to be able to appropriately supply a predetermined amount of toner from the toner container 31. The upper door 7 is located above the toner container 31.
Are arranged to be openable and closable in the direction of an arrow 53 around the base 7a, so that the toner container 31 can be detached.

An optical unit 5 for forming an image dot on the surface of the photoconductor is provided on the upper surface of the photoconductor. The optical unit 5 is a polygon mirror for reflecting laser light from a laser light source (not shown). It has an optical system that forms image dots on the surface of the photoreceptor via the reflection mirror.

In the lower part of the image forming apparatus 1, a control circuit for controlling the apparatus in the image forming apparatus 1 is housed, and a recording paper container is removably provided from the outside. A recording paper storage in front is provided,
The recording paper placed on the pressing spring can be conveyed to the registration rollers 18 and 30 through the passage by the conveyance roller.

On the right side of the image forming apparatus 1, a fixing roller 2
3 and 24 form a fixing unit, and the recording paper that has passed between the photosensitive member and the transfer roller 19 is fixed to the fixing rollers 23 and 24.
The recording paper after fixing is transported by the transport rollers 25, 2
The transferred images are stacked as a face-down tray on the paper discharge tray 6 by rollers 28 and 29 through a passage 27 by a roller 6 and a lower surface.

The image forming apparatus 1 configured as above is
When a power switch (not shown) is closed, a main motor (not shown) starts driving, and when a start switch (not shown) is closed, the photosensitive drum rotates counterclockwise, and the optical unit 5 causes an image to be formed on the surface of the photosensitive drum. The image is developed by a developing roller of a developing device 10, and the developed image is transferred to a recording sheet by a transfer roller 19, fixed by fixing rollers 23 and 24, and
The sheets are conveyed to the sheet discharge tray 6 and accumulated by 5, 26, 28 and 29.

Next, each main part of the image forming apparatus 1 will be described. As shown in FIG. 2, the frame 1 attached in the housing 49
A belt container 15 is provided in the belt container 2 for transporting and accumulating waste toner scraped of residual toner on the surface of the photosensitive drum by the cleaning blade to the waste toner chamber 39 of the toner container 31. However, this specific configuration will be apparent from FIG.

FIG. 1 is a cross-sectional view of a main part of the waste toner transfer unit. The waste toner transfer unit 11 includes a belt housing 15
Opening 15 for discharging waste toner into waste toner chamber 39
and an opening / closing door 13 in which f can be opened and closed.

The belt housing 15 is formed of a transparent synthetic resin, and a pulley 46 rotatably fitted to a lower circulation shaft 47 fixed below the transparent surface 15h is disposed rotatably upward. And the pinion 43 is disposed between the pulley 46 and the pinion 43.
An endless track-like belt 45 having a groove provided in the width direction meshing with the number 3 and having a large number of partition walls 45a erected on the other surface at predetermined intervals is stretched, and the belt 45 is rotated by the pinion 43. It is configured to be rotatable.

An opening 15b is formed above the lower circulation shaft 47, and a cover cylinder 42 extending from the photosensitive drum side and a spiral blade shaft 38 having a spiral blade 37 are formed in the opening 15b. The belt 45 and the opening 15 are fitted with an end and formed to receive waste toner.
b is surrounded by a transparent outer wall 15e.

The pinion 43 is integrally connected to an intermediate gear 32 disposed on the back of the belt housing 15, and the intermediate gear 32 is disposed on the frame 12 via the intermediate gear 33 (not shown). Meshes with a gear 34 connected to a drive source,
The belt 45 is configured to be rotatable by the pinion 43.

As described above, the belt 45 is driven so that the waste toner transport chamber 50 on the upper surface side of the belt is pulled up by the pinion 43 located above and the empty transport chamber on the lower surface side is pushed. If a drive source is connected to the lower circulating shaft 47 and driven, waste toner is loaded in the transport chamber on the upper surface side, and when it becomes heavy, the belt is bent due to an increase in load, and the belt is wavy. Therefore, it is necessary to increase the thickness of the belt so as not to bend in order to cause a loss of the driving force. On the contrary, an extra driving force is required, but in the present embodiment, as described above, the belt 45 is Since the rotational driving force is obtained from the pinion 43 located above, the heavy waste toner transport chamber 50 on the upper surface side of the belt is pulled up, and the thin and light belt is driven by pushing the empty transport chamber on the lower surface side to push. Even if used, the belt can be driven satisfactorily without deflection and satisfactorily.

Next, the relationship between the frame 12 and the belt housing 15 will be described in detail. FIG. 3 is an explanatory view for explaining an operation of attaching the belt container 15 constituting the waste toner transfer unit 11 to the frame 12, and FIG. 4 is a removing mechanism for removing residual toner from the photosensitive drum, and the removed waste. FIG. 4 is a partial cross-sectional configuration diagram illustrating a relationship with a transport mechanism that transports toner to a belt housing.

In FIG. 3, the frame body 12 is formed in a boot shape, and a side wall which rises from a surface 12h and forms an upper wall surface 12b is provided diagonally downward and to the right, and is separated from the upper wall surface 12b by a predetermined distance. A hill-shaped body having a side wall surface 12c and a hill top surface 12e is formed facing the upper wall surface 12b, and a side wall 12i stands upright on the side of the hill top surface 12e opposite to the side wall surface 12c.

A drive gear 35 connected to a drive source (not shown) and a gear 34 are provided on the upper side wall 12g of the hill, and the intermediate gear 3 provided on the back surface of the belt housing 15 is provided.
3 can be connected.

The side wall surface 12c is extended below a locking portion 12d for locking a dowel 15d provided on the back surface of the belt housing 15 described below. The opening 12e is brought into contact with the upper wall surface 12b above the locking portion 12d.
Is formed, and a lower inner peripheral surface 12a which forms the opening of the opening 12e is provided with a cylindrical portion 15a of a belt housing 15 described later.
And rises slightly thicker from the surface 12h on the front side of the paper than the surface 12h.

In the vicinity of the opening 12e, a V-shaped lever 16 having a pivotal center 16a at one end in a bifurcated manner is provided so as to be rotatable in a clockwise direction with a rotating behavior. In the vicinity of the lever 16, an optical sensor 17 having a light-emitting part and a light-receiving part is provided with a bifurcated other rotatable tip when the lever 16 is rotated to the full right. The optical sensor 17 is disposed so as to block the detection portion.

In FIG. 4, an opening 54a is formed in a mounting plate 54 on which the photosensitive drum 9 is rotatably mounted, and the cover cylinder 42 is integrally fitted into the opening 54a. A spiral blade shaft 38 having a spiral blade 37 is rotatably disposed in the cover cylinder 42. On the photosensitive drum 9 side of the cover cylinder 42, a rectangular long groove 42a is provided over the entire length of the photosensitive drum.
A thin plate 57 having one end adhered to one side of the photosensitive drum 9 is disposed with the other end in contact with the surface of the photosensitive drum 9 below the cleaning blade 56, and is configured as a waste toner guide.

The mounting plate 54 extends directly or indirectly to the right end side of the photosensitive drum 9 on the right side in FIG. 4, and a grip portion is provided at the right end portion thereof, and the grip portion is pulled out. And the cover cylinder 42 and the spiral blade shaft 38 are
4 along with the cleaning blade 56,
It is configured so that it can be pulled out integrally.

Next, a method for loading the belt housing 15 into the frame 12 will be described. When the upper door 7 is opened in FIG. 3 in a state where the mounting plate 54 in FIG. 4 is pulled out and the cover cylinder 42 is retracted from the surface 12 h of the frame 12,
9a appears, the back surface of the belt housing 15 is placed on the upper surface 12e of the hill-shaped body of the frame body 12, and the dowel 1 projecting from the back surface is mounted.
5d is brought into contact with the side wall surface 12c as indicated by an imaginary line 15'd, and the outer periphery 15a (FIG. 4) of the cylindrical portion protruding from the back surface of the belt housing 15 is fixed to the side wall 12c of the frame 12.
b, the belt housing 15 in the oblique state is
Insert inside.

When the belt housing 15 is lowered, the lower outer periphery 15c of the outer frame comes into contact with the turning tip of the holding lever 16, the holding lever 16 turns counterclockwise, and the belt housing 15 moves to the detector 17 position. 5, the outer periphery 15a of the cylindrical portion protruding from the back surface of the belt housing 15 abuts on the inner periphery 12a below the opening 12e, and further lowering stops, and in FIG. When the toner container 31 is not loaded, the position reaches the position indicated by the solid line.

In the illustrated position, the tip of the holding lever 16 rides over the engaging recess 15i of the belt housing 15, and the belt housing 15 is attached to the holding lever 16 with the opening 12e as the center of rotation. The dowel 1 is rotated clockwise by the force and provided on the back surface of the belt housing 15.
5d penetrates into the locking portion 12d and takes the position shown by the dashed line 15 '.

In this state, as shown in FIG. 4, a mounting plate 54 integral with the photosensitive drum 9 and the cover cylinder 42 is inserted into the apparatus main body from the right side, and the tip of the cover cylinder 42 is attached to the belt housing. 15 is inserted into the inner periphery 15b of the cylindrical portion protruding from the rear surface of the cylindrical member 15.

Next, the operation of replacing the toner container 31 will be described. In FIG. 5, an opening / closing door (upper door) 7 for opening and closing the upper opening of the toner container mounting portion 44 opens and closes in a direction of an arrow 53 around a rotation axis 7 a of a hinge portion provided near the left end of the paper discharge tray 6. It is arranged freely. The upper door 7 is configured to be able to stand upright at the illustrated position by a mechanism (not shown).

The toner container 31 has a combination of a toner collection container for storing waste toner and a toner chamber for supplying new toner. In FIG. 5, the belt container 15 is located at the position indicated by the dashed line. The surface 31c extending from the side surface 31b of the toner container 31 is located on the side opposite to the belt housing 15, and the side 31a is in a position not in contact with the belt housing 15.

Accordingly, the toner container 31 is
1 ′ and can be placed in the toner container placement section 44. When the upper door 7 is rotated counterclockwise from this state, the arm end 13a of the opening / closing door 13 that opens and closes the opening of the waste toner chamber 39 is sandwiched by the concave portion 7b of the upper door 7, and the belt housing 15 is moved. It turns counterclockwise around the opening 12e of the frame body 12 to reach the solid line position, the details of which are described in detail in FIG.

In FIG. 6, the upper door 7 turns left, and the cam surface 7c comes into contact with the arm 13a of the opening / closing door 13, and the tip 13a of the arm is pushed by the cam surfaces 7d and 7e and turns to the left. Then, the belt housing 15 rotates to the left, and the arm tip 13a.
When the toner enters the concave portion 7b, a locking piece 15j formed of an elastic body provided at the upper end of the belt storage body 15 is locked by the locking portion 31d of the toner container 31, and the belt storage body 1
The gear 33 provided on the back surface of the frame 5 is a gear 34 provided on the frame 12.
The sponge provided in the toner container 31 for preventing scattering of waste toner is compressed by the opening / closing door 13 to reach FIG.

In FIG. 7, when the upper door 7 is further rotated, the arm tip 13a of the opening / closing door 13 is taken into the concave portion 7b, and the opening / closing door 13 descends obliquely downward. The discharge opening 15f of the belt housing 15 is opened to reach FIG.

In this state, the sponge 36 is
And the waste toner chamber 39 are compressed and interposed between the belt housing 15 and the waste toner chamber 39.
It does not fly outside and contaminate the cabin. In this state, since the belt member 45 is rotating in the direction of the arrow, the waste toner 48 is discharged from the waste toner transfer chamber 50 of the belt member 45 by the kinetic energy of the partition wall 45a, and the self-weight of the toner is added to the waste toner chamber. It falls into 39.

Next, a method for removing the toner container 31 from the apparatus main body will be described. When the upper door 7 is rotated clockwise from the state shown in FIG.
Is closed, and the state shown in FIG. 7 is obtained.

After the upper door 7 is further rotated and held upright as shown in FIG. 5, when the arm 13b of the opening / closing door 13 of the belt housing 15 shown by a solid line is pushed rightward with a finger, the The piece 15j is disengaged from the locking portion 31d of the toner container 31, the locking portion 15i of the belt container 15 is pressed by the rotating tip of the push lever 16, and the opening of the frame 12 is urged by the push lever 16. Is rotated clockwise using the lower inner circumference 12a as a guide to move to the position of the virtual line 15 '.

At this time, the dowels 15d projecting from the back surface of the belt housing 15 enter the recess 12d (FIGS. 3 and 4), and the upward movement of the belt housing 15 is locked by the recess 12d. You. In this state, the belt housing 15
Is separated from the side wall 31a of the toner container 31, so that the toner container 31 can be pulled upward without any obstacle.

Next, the operation of conveying the waste toner scraped from the photosensitive drum 9 to the belt housing 15 will be described. As shown in FIG. 4, the waste toner 48 scraped off by the cleaning blade 56 in contact with the surface of the photosensitive drum 9 slides on the surface of the thin plate 57 and enters the cover cylinder 42 from the opening 42 a of the cover cylinder 42. Fall.

The waste toner 48 is conveyed to the belt housing 15 by the spiral blade 37 and falls into the belt housing 15. In FIG. 1, the belt housing 15 includes a spiral blade 37.
Is disposed obliquely with respect to the direction in which the waste toner 48 is conveyed by the
5, a plurality of waste toner transfer chambers 50 are arranged between the waste toner receiving port and the lower circulation shaft 47.

Therefore, even if the waste toner 48 falling into the belt housing 15 is solidified by the rotation of the spiral blade 37, the waste toner 48 collides with the belt 45 or the waste toner by the falling energy due to its own weight. It falls apart. Therefore, a large number of waste toners 48 solidify and solidify near the entrance of the belt storage pair 15,
The inside of the cover cylinder 42 is solidified by the waste toner, and furthermore, the opening 42a of the cover cylinder 42 is prevented from being blocked and scattered in the apparatus, and the surface of the photosensitive drum 9 is prevented from being damaged.

In the present embodiment, the waste toner transported to the waste toner chamber of the toner container receives the waste toner scraped off from the photosensitive drum by the removing mechanism and is provided in a waste toner receiving port provided in the belt housing. Below, a lower circulation shaft of the belt transporter is provided, and the waste toner transfer chamber of the belt transporter is configured to circulate below the waste toner receiving port. Although the belt is transported to the waste toner transfer chamber of the belt transporter, a drop may be formed between the removal mechanism and the receiving port.

Further, in this embodiment, waste toner from the removal mechanism of the photosensitive drum is provided with a head from the opening provided in the belt housing, and the toner is conveyed to the belt housing provided below the opening. The belt transport body is disposed obliquely so that it is dropped by its own weight and transported to the waste toner transfer chamber of the body, but the belt transport body is not limited to this, and the waste toner from the removal mechanism is dropped. The belt transporter is configured to be transported to the waste toner transfer chamber of the belt transporter, and includes, for example, all modes in which the belt transporter is parallel to or intersects with the gravity line.

Also, in the case where the belt conveying member is disposed obliquely with respect to the direction of gravity and the waste toner is directly received in the waste toner conveying chamber, for example, FIG.
As shown in FIG. 1, not only is the waste toner transporting path provided so that the direction of transport of the waste toner by the spiral blades goes from the back surface to the front surface of the paper, but also the waste toner transport chamber 50 transports the waste toner from the right hand side in FIG. May be dropped.

As described in detail above, in the present embodiment, the waste toner removed from the photosensitive drum by the removing mechanism is transported with a head to the waste toner transfer chamber of the belt transporter. Therefore, the waste toner that has fallen into the transfer chamber is located in the transfer chamber and rises from below. At this time, the waste toner collides with the waste toner that falls from the opening, and the waste toner due to natural fall is loaded by the mutual kinetic energy. Pulverized with each other with a greater impact force to collide with the waste toner. Therefore, even if a plurality of toner powders are solidified, they are loosened by falling due to their own weight, and solidification of waste toner is prevented as much as possible.

[0058]

As described above, according to the first aspect of the present invention, the waste toner from the removing mechanism is transported to the waste toner transfer chamber of the belt transporter which transports the waste toner to the waste toner chamber with a head. Therefore, even if a plurality of toner powders are solidified, they are loosened by falling due to their own weight, and solidification of waste toner is prevented as much as possible.

According to a second aspect of the present invention, a waste toner transfer port is provided with a waste toner transfer port, and a lower circulation shaft of the belt conveyor is disposed below the waste toner transfer port.
Since the waste toner transfer chamber of the belt conveyor is configured to circulate below the waste toner receiving port, even if a plurality of toner powders are solidified as in claim 1,
It is loosened by its own weight and solidification of waste toner is prevented as much as possible.

According to a third aspect of the present invention, the belt conveying member is disposed obliquely with respect to the direction of gravity so that the waste toner is directly received by the waste toner conveying chamber. When the waste toner that has fallen into the transport chamber of the transport body is located in the transport chamber and rises from below, the waste toner collides with the waste toner that falls later, and the waste toner due to natural fall is loaded by the kinetic energy of each other. Pulverized from each other with greater impact force colliding with waste toner.

[Brief description of the drawings]

FIG. 1 is a sectional view of a waste toner transfer unit according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of an image forming apparatus according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram illustrating an operation of loading a waste toner transfer unit.

FIG. 4 is a cross-sectional configuration diagram illustrating an arrangement relationship between a waste toner transfer unit and a waste toner removing mechanism.

FIG. 5 is an explanatory diagram illustrating a method of loading a toner container.

FIG. 6 is an explanatory diagram illustrating an operation of an upper door of a loaded waste toner transfer unit.

FIG. 7 is an explanatory diagram illustrating a state in which the waste toner transfer unit is locked in the toner container.

FIG. 8 is a configuration diagram illustrating a state in which an open / close door of a waste toner transfer unit is opened.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Image forming apparatus 6 Paper discharge tray 7 Upper door 10 Developing device 11 Waste toner transfer part 12 Frame 13 Opening / closing door 15 Belt housing 39 Waste toner chamber (toner recovery part) 44 Toner container mounting part 45 Belt (belt conveyance body) )

Continuation of the front page (56) References JP-A-61-186980 (JP, A) JP-A-9-120242 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) G03G 21 / 10-21/12

Claims (2)

(57) [Claims] 1. A waste toner removed from a photosensitive drum by a removing mechanism is transported to a waste toner transporting unit, and the waste toner is transported from the photosensitive drum by a circulating belt transporter disposed in the waste toner transporting unit. In an image forming apparatus configured to be transferable to a toner recovery unit located above, a waste toner receiving port from the removing mechanism is connected to the belt transporter.
Arranged above the lower circulation axis of the feeder,
Of the waste toner is dropped by its own weight
The belt is configured to be able to collide with the belt conveying member, and the bell
A drive source is connected to the upper circulation shaft side of the
An image forming apparatus configured to obtain a rotational driving force from a side . 2. The apparatus according to claim 1, wherein the belt conveyor is inclined with respect to the direction of gravity.
And a large number of partition walls
A waste toner transfer chamber formed at a predetermined interval
The image forming apparatus according to claim 1, wherein the a.