JP3700621B2 - Image forming unit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an image forming unit used in an image forming apparatus.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in an electrophotographic image forming apparatus using an electrophotographic image forming process, a process unit system in which some of image forming participation means are integrated is known. In this process unit system, a developer accommodating portion as an image formation participating means and a cleaned recovered developer accommodating portion are provided in one unit or separate units. By using the unit, the developer as a consumable is consumed, and the developer container is eventually emptied. On the other hand, in the collected developer accommodating portion, the amount of collected developer to be collected increases, and the collected developer becomes full. Such a time is a unit replacement time. There is also known a unit in which a recovered developer accommodating portion is disposed in a partial space of the developer accommodating portion.
[0003]
In any case, when such a unit comes to be replaced, other members constituting the unit may still be usable. For this reason, it is useless to dispose of each unit, and it is desired to use it again.
To regenerate such a unit, a disassembling process reverse to the assembling process of the unit is performed, the usable parts are inspected, cleaned and reassembled, and a new developer is refilled. Further, it is desirable that a predetermined inspection / inspection is further performed, and a unit that has passed the inspection / inspection is again provided to the market as a new unit.
[0004]
FIGS. 11 to 14 show a TS (toner set) reproduction process as an example of the reproduction. Here, waste toner is present in the toner collection bag in the TS. For this reason, it is necessary not only to refill the toner but also to eliminate the waste toner by replacing the toner collection bag.
[0005]
FIG. 11A is an external perspective view of a conventional image forming unit. FIG. 4B shows the position of the collection bag 46 in the image forming unit and the waste toner receiving pipe 61 that supports the collection bag 46, and the transport path of the waste toner 48 collected in the collection bag 46. 2 is a perspective view of FIG.
[0006]
A process of disassembling this image forming unit for reproduction and then assembling it will be described below.
The image forming unit shown in FIG. 11A can be disassembled into a DS (drum set) and a TS (toner set) as shown in FIG.
[0007]
The TS can be further disassembled by removing the side covers 66a and 66b and the front stay 58 as shown in FIG. 12 (b).
Conventionally, after that, the TS cover 44 of FIG. 12B is further removed, and the collection bag 46 inside and the waste toner receiving pipe 61 that supports the collection bag 46 are taken out, and the waste toner receiving pipe 61 is used to remove the waste toner. The collection bag containing was removed and replaced with a new collection bag.
[0008]
FIG. 13 shows a process of attaching a new collection bag 46 to the waste toner receiving pipe 61. The collection bag 46 in the figure is made of a flexible material such as polyethylene. The collection bag 46 is formed by cutting a tubular film and welding it to a key mold with a hot iron, a high frequency sewing machine or the like. A slit 46d is formed in the key-shaped welded portion 46a. For this reason, the welded portion 46a is also a kimono sleeve portion 46a. And the kimono 46a is parted from the body 46c.
[0009]
As shown in FIG. 13 (a), the collection bag 46 is in the shape of a short horizontally long T-shirt with the neck and hem closed. The cylindrical sleeve portion 46b of the collection bag 46 is passed through the waste toner receiving pipe 61 and one end thereof is aligned. At this time, since the collection bag 46 is longer than the waste toner receiving pipe 61, the other end of the waste toner receiving pipe 61 does not match the other end of the collection bag 46.
[0010]
In order to match this, as shown in FIG. 13B, both ends of the collection bag are wound around the irregularities 61b formed at both ends of the waste toner receiving pipe 61. And after that, it fixes with the double-sided adhesive tape 46e.
Further, as shown in FIG. 13C, one end opening of the waste toner receiving pipe 61 is further closed by a lid 61c, and air is blown from the opening at the other end. The blown air flows into the collection bag 46 through the outlet hole 61 a of the waste toner receiving pipe 61. At this time, it is checked whether the collection bag 46 is inflated. When it swells, it can be confirmed that there is no hole in the collection bag 46.
[0011]
Through the above steps, the collection bag 46 is attached to the waste toner receiving pipe 61. Then, as shown in FIG. 14, it is assembled to the upper portion 67a of the TS. Thereafter, the upper portion 67a and the lower portion 67b are joined by ultrasonic fusion or the like. Thereafter, the toner is filled by a toner filling machine (not shown) with the cap 73 removed. Further, the TS is assembled with the side covers 66a and 66b and the front stay 58.
[0012]
By the way, in the case of reproduction by a genuine manufacturer in this unit reproduction, of course, since it also has a unit production facility, it is possible to carry out the above steps, replace with new parts if necessary, genuine developer Can be refilled. In such reproduction by a genuine manufacturer, the quality of the provided reproduction unit is also guaranteed, so that troubles due to defective units do not occur and the user is not inconvenienced.
[0013]
[Problems to be solved by the invention]
However, in recent years, so-called remanufacturers who are not genuine manufacturers often regenerate units. In this case, the refilled developer is not a genuine developer specified by a genuine manufacturer. And the quality of those developers is often poor, and there are many cases where the above-mentioned regeneration process is not carried out properly, and this causes a problem that defective regenerated products overflow.
[0014]
That is, for example, there are many contractors who clean the unit in appearance and simply refill the developer and provide it to the market without conducting a sufficient inspection to disassemble a part of the unit. Such a unit has a problem that it causes a device trouble due to an adverse effect on the entire device, and thus the life of the entire device is shortened.
[0015]
Although details will be described later, in the case of the developer unit to which the present application is applied, a recovery bag for recovering the waste toner recovered by the cleaner is disposed in the upper space of the developer hopper as in the conventional example. Therefore, when the developer unit is regenerated, it is necessary to remove the waste toner collected in the collection bag prior to refilling the developer, or to replace it with a new empty collection bag.
[0016]
In this case, there is no problem if it is replaced with a new empty collection bag, but it is conceivable that the waste toner is simply extracted from the collection bag with a suction tool such as a vacuum cleaner. In order to simplify the work, the above-mentioned remanufacturer may take such a method.
[0017]
However, if such a method is used, the collection bag is scratched during suction, or it is already in use because it is already in use, so if you continue to use it, it will be removed from the collection bag. As a result of waste toner leaking into the developing hopper and mixing the colors, particularly in the case of forming a color image, there has been a problem in that an image having a correct hue cannot be provided.
[0018]
The present invention improves the unit configuration so that the developer unit as described above can be regenerated only in the correct regenerating process, and prevents the regenerating company from flooding the defective regenerating unit that does not necessarily follow the correct procedure. The object is to provide a more preferable unit.
[0019]
[Means for Solving the Problems]
  According to the first aspect of the present invention, there is provided a waste toner collecting unit for collecting waste toner carried on an image carrier and not contributing to image formation, and discharging the waste toner to the waste toner collecting unit. In an image forming unit comprising a waste toner collecting device having at least a waste toner discharging means and detachable from the image forming device,The waste toner discharging means includes a cylinder having at least one discharge port closed at one end of both ends and an intermediate region between the both ends, and the waste toner connected to the other end of the cylinder at the discharge port. A waste toner conveying member that conveys the gas and a valve disposed at the discharge port of the cylinder,Waste toner present in the waste toner collecting sectionWhereA blocking member that prevents the waste toner from being sucked when a suction force is applied to suck and collect the toner at a fixed position.When,
This can be achieved by providing an image forming unit.
[0020]
  Here, since the blocking member blocks the suction of waste toner by a suction tool such as a vacuum cleaner, for example, it is possible to suppress the flooding of defective playback units that have been recovered through an undesired regeneration process as described in the conventional example. Become.
[0022]
Claims2According to the described invention, the image forming unit is a TS (toner set) that can be combined with a DS (drum set).
[0023]
  Claims3According to the described invention, the claims1ofThe waste toner collecting part comprises a toner collecting bag that covers the cylinder and is connected to the cylinder at both ends of the cylinder,The collection bag has a T-shirt shape and is a collection bag fixed to a cylinder for transporting waste toner.
  Claims4According to the described invention, the claimsThreeThe toner collection bag is made of synthetic resin.
[0024]
  Claims5According to the described invention, the waste toner conveying member according to claim 1 includes a cylinder and a conveying screw rotating in the cylinder.
  Thus, claim 1 is the most significant content, and claim 35More specifically defines claim 1 and claims4 isClaim 3 is further embodied. Meanwhile, claims2Specifically defines claim 1 from another point of view. That is, the claim2Indicates that the image forming unit is a TS (toner set).
[0025]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
<First Embodiment>
FIG. 1 shows an example of a so-called tandem color printer. This printer device is connected to a host device such as a personal computer by a cable (not shown).
[0026]
The internal configuration of the printer apparatus 1 in FIG. 1 includes an image forming unit 2, a duplex printing transport unit 3, and a paper feeding unit 4. Here, the image forming unit 2 has a configuration in which four image forming units 5 to 8 are arranged side by side, and magenta (M), cyan (C), and yellow (Y) from the right side to the left side of the drawing. And black (K) in this order. Among them, the magenta (M), cyan (C), and yellow (Y) image forming units 5 to 7 are configured to perform color printing by subtractive color mixing, and the black (K) image forming unit 8 is monochrome. Used for printing.
[0027]
Here, each of the image forming units 5 to 8 includes a drum set C1 and a toner set C2, and has the same configuration except for the developer stored in the developing container. Therefore, the configuration will be described using the image forming unit 7 for yellow (Y) as an example. The drum set C1 houses the photosensitive drum 9, the charger 10a, the cleaner 10e, and the like, and the print head 10b is disposed above the drum set C1. The toner set C2 contains a developing roll 10c and toner.
[0028]
The peripheral surface of the photosensitive drum 9 is made of, for example, an organic photoconductive material. In the vicinity of the peripheral surface of the photosensitive drum 9, a charger 10a, a print head 10b, a developing roll 10c, a transfer unit 10d, and a cleaning blade 10e. Are sequentially arranged. The photosensitive drum 9 is rotated in the direction of the arrow, and first, the peripheral surface of the photosensitive drum 9 is uniformly charged by applying a charge from the charger 10a. Then, an electrostatic latent image is formed on the peripheral surface of the photosensitive drum 9 by optical writing based on the print information from the print head 10b, and a toner image is formed by development processing by the developing roll 10c. At this time, the toner image formed on the peripheral surface of the photosensitive drum 9 is made of yellow (Y) toner stored in the toner set C2. In this way, the toner image formed on the peripheral surface of the photosensitive drum 9 reaches the position of the transfer unit 10d as the photosensitive drum 9 rotates in the direction of the arrow, and directly below the photosensitive drum 9 in the direction of the arrow. The image is transferred to the moving paper.
[0029]
On the other hand, the paper is transported by the paper feed cassette 11, the standby roll 12, the transport belt 13, the drive roll 14, and the like constituting the paper feed unit 4. The paper feed cassette 11 is rotated by the rotation of the paper feed roller 11 a. The sheet unloaded from the sheet is sent to the standby roller pair 12 and further sent onto the conveying belt 13 at a timing coincident with the toner image, and reaches each transfer unit 10d. Then, the toner image is transferred in each transfer device 10d, and the sheet on which the toner image is transferred moves on the conveyance belt 13 in the direction of the arrow according to the movement of the conveyance belt 13, and a heat fixing process is performed in the fixing unit 15. .
[0030]
Further, not only the yellow (Y) toner image but also the magenta (M) and cyan (C) toner images are transferred onto the upper surface of the paper, and printing of colors according to the subtractive color mixture described above is performed. .
The above-mentioned paper includes not only the paper carried out from the paper feed cassette 11 but also the paper supplied from the MPF tray 16. In this case, the paper is carried in by the paper feed roller 16a, Printing processing is performed.
[0031]
The fixing unit 15 includes a heat roll 15a (hereinafter referred to as a fixing roll), a press roll 15b, and an oil application roll 15c, and a sheet is nipped and conveyed between the fixing roll 15a and the press roll 15b. In the meantime, for example, the toner images of a plurality of colors transferred to the paper are melted and thermally fixed on the paper. The oil application roll 15c has a function of applying releasable oil to the peripheral surface of the fixing roll 15a and removing toner remaining on the fixing roll 15a. Note that the paper on which the toner image is fixed by the fixing unit 15 is conveyed upward or leftward on the paper surface via the switching flap 17. Then, the paper is guided to the paper discharge unit 21 via the paper discharge roll pair 20.
[0032]
On the other hand, the transport unit 3 for double-sided printing is configured to be detachable from the apparatus main body, and is a unit to be mounted when performing double-sided printing with the printer device 1 of this example, and includes a plurality of reverse transport roller pairs 18a to 18a. 18e is disposed. In the case of duplex printing, the paper is once sent upward by the switching flap 17, and when the trailing edge of the paper reaches the transport roll 19, for example, the transport of the paper is stopped and the paper is transported in the reverse direction. By this control, the paper is carried into the paper conveyance path of the duplex printing conveyance unit 3 set at the position indicated by the dotted line, and the paper is fed in the reverse direction by the reverse conveyance roller pairs 18a to 18e and reaches the standby roller pair 12. As described above, the toner image is sent to the transfer unit at the same timing as the toner image, and the toner image is transferred to the back surface of the paper.
[0033]
FIG. 2 is an external perspective view of the printer apparatus 1 shown in FIG. The printer apparatus 1 shown in FIG. 1 includes an apparatus main body upper part 22 and an apparatus main body lower part 23. An operation panel 33 is disposed on the apparatus main body upper part 22, and a printing paper discharge unit 21 is also formed on the upper surface. ing. The operation panel 33 includes a key operation unit 33a provided with a plurality of keys, and a display unit 33b that is a liquid crystal display that performs display based on display information output from a CPU 30 shown in FIG. . In addition, printing paper produced by the image forming unit is output to the paper discharge unit 21 by the rotation of the paper discharge roll 20 and is sequentially stacked on the paper discharge unit 21.
[0034]
The apparatus main body lower portion 23 is provided with a front cover 24 that can be opened and closed on the front surface thereof. The front cover 24 is opened, for example, during jam processing or maintenance.
FIG. 3 is a circuit block diagram of the printer apparatus 1 having the above configuration. In FIG. 3, the circuit block includes an interface controller (hereinafter referred to as I / F controller) 26, a printer controller 28, a printer printing unit 29, a CPU 30, a ROM 31, an operation panel 33, and an EEPROM 32. The I / F controller 26 converts print data supplied from the host device into bitmap data and develops it in the frame memory 27. In the frame memory 27, a storage area is set for each of magenta (M), cyan (C), yellow (Y), and black (K), and data of each color is developed in the corresponding area.
[0035]
The data developed in the frame memory 27 is output to the printer controller 28 and output to the printer printing unit 29 under the control of the CPU 30. At this time, data of each color of magenta (M), cyan (C), yellow (Y), and black (K) is supplied to the corresponding print head 10b of FIG.
[0036]
The ROM 31 stores the system program of this example, and the CPU 30 performs processing according to this system program.
FIG. 4 shows a side sectional view of the image forming unit of the present invention. This image forming unit is detachably attached to the color image forming apparatus 1 and includes the above-described TS (toner set) and DS (drum set). Then, it is positioned by the front stay 58.
[0037]
The TS rotatably holds a developing roller 10c made of a conductive rubber roller in its lower opening, and contains toner 41 therein, and agitates the toner disposed so as to be buried in the toner 41. An agitator 43 is provided. In the TS cover 44 further above the agitator 43, there is a waste toner receiving pipe 61 and a collection bag 46. In the waste toner receiving pipe 61, there is a conveying screw 47, and in the collection bag 46, waste toner 48 that has passed through the waste toner receiving pipe 61 by this conveying screw 47 is accumulated.
[0038]
A supply roller 51 made of a sponge body is disposed in pressure contact with the developing roller 10c at the bottom of the TS. The developing roller 10c is provided with a metal leaf spring doctor blade 52 in pressure contact with the oblique upper right peripheral surface thereof. A doctor bias of “−600 V” is applied to the doctor blade 52 from a bias power source. Further, the conductive member (10^ThreeΩ) squeeze sheet (conductive regulation sheet) 53 is provided. A sheet bias is applied to the squeeze sheet 53 from a bias power source in the range of 0 V to the following development bias.
[0039]
The developing roller 10c includes a cored bar and a cylindrical semiconductive material (10⁶Ω) urethane rubber, and a development bias of “−350 V” is applied to the cored bar from a bias power source.
The supply roller 51 includes a cored bar and a cylindrical semiconductive (10) surrounding the cored bar.⁶Ω) urethane sponge, and a supply bias of “−550 V” is applied to the cored bar from a bias power source. The supply roller 51 is in pressure contact with the developing roller 10c. The supply roller 51 scrapes off the undeveloped toner remaining on the peripheral surface of the developing roller 10c after the development on the photosensitive drum 9 is completed in order to eliminate the developing memory.
[0040]
The absolute value of the bias voltage (−550V) applied to the supply roller 51 is larger than the absolute value of the bias voltage (−350V) applied to the developing roller 10c, and the voltage difference is in the range of 200V to 500V. It is set to fit.
Further, the bias power sources for the developing roller, the squeeze sheet, the supply roller, and the doctor blade may be provided individually, or may be shared by providing a voltage dividing circuit including a resistance element in the power source unit.
[0041]
The DS (drum set) is protected by a DS cover 56 and a drum cover 57, and includes a photosensitive drum 9, a cleaning blade 10e, a charger 10a, and the like. Here, the drum cover 57 is movable back and forth.
In the printing process, among the toners formed on the photosensitive drum 9 and transferred to the paper, there is toner that still remains on the photosensitive drum 9 after the transfer.
[0042]
Such toner is scraped off from the peripheral surface of the photosensitive drum 9 by the cleaning blade 10 e to become waste toner 48 and falls into the DS casing 54.
The waste toner 48 is soon transported by the waste toner discharge pipe 55, taken over by the transport pipe 60, reaches the collection bag 46 through the waste toner receiving pipe 61, and accumulates there.
[0043]
FIG. 5 shows a view in which the waste toner receiving pipe 61 and the collection bag 46 are provided with a conveying screw 47. As shown in the figure, the drive shaft 62 that drives the conveying screw 47 is supported by a bearing 63 positioned at the end of the waste toner receiving pipe 61. A gear 64 is fixed to the same end. A packing 65 is inserted between the bearing 63 and the gear 64 to seal the inside of the waste toner receiving pipe from the outside. The drive shaft 62 is connected to the conveying screw 47 at the approximate center of the waste toner receiving pipe 61.
[0044]
When the gear 64 is driven by a driving means such as a motor (not shown), the conveying screw 47 rotates via the driving shaft 62 and starts conveying (collecting) waste toner.
At this time, the waste toner 48 conveyed as indicated by arrows A and B is discharged from the substantially center of the waste toner receiving pipe 61 through the outlet hole 61a of FIG. Go. As the waste toner 48 is collected, the accumulation in the collection bag gradually spreads from the center to both sides.
[0045]
When the toner is used in such a TS apparatus main body and the lifetime is reached, the TS main apparatus is regenerated. As a regeneration method at that time, it is necessary not only to refill the toner, but also to replace the toner collection bag 46 with a new one or to remove the waste toner 48 collected in the toner collection bag 46. This is because waste toner 48 accumulates in the toner collection bag 46 as the toner is consumed, as shown in FIG.
[0046]
FIG. 6A is an external perspective view of the image forming unit of the present invention. FIG. 4B shows the position of the collection bag 46 in the image forming unit and the waste toner receiving pipe 61 that supports the collection bag 46, and the transport path of the waste toner 48 collected in the collection bag 46. FIG. 5 is a perspective view of FIG. 4A to show the blocking member 49 attached to the waste toner receiving pipe 61. FIG.
[0047]
A process of disassembling this image forming unit for reproduction and then assembling it will be described below.
The image forming unit in FIG. 6A can be disassembled into DS (drum set) and TS (toner set) as shown in FIG. 7A.
[0048]
The TS can be further disassembled by removing the side covers 66a, 66b and the front stay 58 as shown in FIG. Further, if necessary, it is possible to separate them by making a hole or the like in the joint portion between the upper portion 67a and the lower portion 67b.
As described in the conventional example, some refurbishrs have further removed the conveying pipe 60 from one end of the waste toner receiving pipe 61 as shown in FIG. The drive shaft 62 may be extracted from the other end or may not be extracted.
[0049]
Then, in order to extract the waste toner 48 in the collection bag 46 described above, as shown in FIG. 8B, a suction member such as a vacuum cleaner is attached to one end of the cylindrical waste toner receiving pipe from which the conveying screw 47 has been once extracted. 71 was attached and suction was performed with a predetermined suction force. In this case, since air leaks from the other end, even if suction is performed as in this method, the pressure is not reduced extremely. Further, since the toner is powder and light, it can be easily sucked by this method.
[0050]
As described above, the upper portion 67a can be easily reproduced. However, since this regeneration does not necessarily follow the correct procedure, the cause of the flooding of defective regeneration units is as described in the conventional example.
Therefore, in order to prevent such unfavorable reproduction and provide a more preferable unit to the user, the present embodiment has the following configuration.
[0051]
That is, the sheet-like blocking member 49 is attached to the waste toner outlet hole 61 a of the waste toner receiving pipe 61 that supports the collection bag 46. The blocking member 49 is made of, for example, mylar. As shown in FIG. 4A, the blocking member 49 is affixed to the outlet hole 61a in a partially floating state so as not to hinder the collecting operation to the collecting bag 46 (so as not to clog the waste toner). Keep it. In this state, when the printing operation is performed until the TS life, the waste toner 48 is naturally filled in the collection bag 46. When the TS is reused, an operation for extracting the waste toner 48 from the collection bag 46 is required. As described above, as described above, the waste toner receiving pipe 61 and the transport pipe 60 are disconnected from each other, the suction tool 71 such as a vacuum cleaner is applied from the joint hole of the waste toner receiving pipe 61, and the waste toner 48 is removed. It is to suck out. In the present invention, as shown in FIG. 4B, the blocking member 49 is in a state of closing the outlet hole 61 a by the suction force of the suction tool 71. As a result, the waste toner 48 becomes difficult to suck out. This indicates that it is difficult to undesirably reproduce the TS described in the conventional example. In addition, the exit hole 61a is shown by FIG.6 (b), for example. The reason why the parenthesis (61 a) and the parentheses are attached to the reference numeral is that the outlet hole 61 a is hidden behind the blocking member 49 and cannot be seen.
[0052]
A modification of this embodiment will be described below. In the modified example, the valve 50 is attached to the joint hole of the waste toner receiving pipe 61 as shown in FIG. The valve 50 is bonded to the waste toner receiving pipe 61, has a conical shape with a hole at the tip, and can be said to be made of an extremely thin Mylar or rubber. When an operation of extracting the waste toner 48 from the collection bag 46 is performed, if the suction tool 71 such as a vacuum cleaner is applied to the joint hole as shown in FIG. 10 and the waste toner 48 is to be sucked out, the valve 50 is deformed by the suction force. Will close the hole. As a result, the waste toner 48 is difficult to be sucked out, and undesirable reproduction of TS becomes very difficult.
[0053]
In the above example, the toner recovery unit is shown in the form of a synthetic resin bag. However, the toner recovery unit may be a space partitioned in the hopper.
Further, in the present invention, since the developing hopper of the developing device has a collecting unit that collects the waste toner collected from the cleaning mechanism, the example of regenerating the developing unit called refilling the toner into the developing device is shown. The developing unit is not limited.
[0054]
For example, the present invention can also be applied to reproduction in the case of an image forming unit in which a collected toner portion (which may be a space) is provided in the cleaning mechanism portion of the image forming unit. For example, the toner collected in the collected toner portion is sucked and the drum is replaced with a new one.
[0055]
【The invention's effect】
As described above, according to the present invention, by sticking a sheet to the outlet hole of the transport pipe leading to the waste toner collection bag, it is difficult to remove the waste toner to the outside even if the waste toner is sucked with a suction tool or the like. There is an effect. For this reason, it is possible to make it difficult to reproduce the TS undesirably.
[Brief description of the drawings]
FIG. 1 is a side sectional view of a printer apparatus of the present invention.
FIG. 2 is an external perspective view of the printer apparatus of the present invention.
FIG. 3 is a circuit block diagram of the printer apparatus of the present invention.
4A is a side sectional view of TS (toner set) and DS (drum set) of the present invention, and FIG. 4B is a side sectional view of an upper portion of TS (toner set) of the present invention.
FIG. 5 is a diagram illustrating a waste toner recovery unit of the present invention.
6A is an external perspective view of TS and DS of the present invention, and FIG. 6B is an external view of (a) to show a collection bag and a blocking member attached to a cylinder supporting the collection bag. It is the figure which saw through the perspective view.
7A and 7B are diagrams showing a reproduction process of the image forming unit of the present invention.
8A is a diagram showing a reproduction process of the image forming unit of the present invention, and FIG. 8B is a diagram showing a suction member attached to one end of the image forming unit of the present invention and sucking. is there.
FIG. 9 is a view showing a valve attached to one end of the image forming unit of the present invention.
FIG. 10 is a diagram illustrating a state where one end of the image forming unit of the present invention is sucked with a suction tool.
FIGS. 11A and 11B are diagrams illustrating a reproducing process of a conventional image forming unit. FIGS.
FIGS. 12A and 12B are diagrams illustrating a reproducing process of a conventional image forming unit. FIGS.
FIGS. 13A, 13B, and 13C are diagrams illustrating a reproduction process of a conventional image forming unit. FIGS.
FIG. 14 is a diagram illustrating a reproducing process of a conventional image forming unit.
[Explanation of symbols]
1 Printer device
2 Image forming unit
3 Transport unit for duplex printing
4 Paper feeder
5-8 Image forming unit
9 Photosensitive drum
10a Charger
10b Print head
10c Developing roll
10d transfer device
10e cleaner
11 Paper cassette
12 Standby roll
13 Conveyor belt
14 Drive roll
15 Fixing unit
15a heat roll
15b Press roll
15c Oil application roll
16 MPF tray
16a Feed roller
17 Switching flap
18a-18e Reverse conveying roller pair
19 Transport roll
20 Paper discharge roll
21 Output section
22 Upper part of device body
23 Lower part of main unit
24 Front cover
26 I / F controller
27 frame memory
28 Printer controller
29 Printer printing section
30 CPU
31 ROM
32 EEPROM
33 Operation panel
33a Key operation unit
33b Display section
41 Toner
42 TS casing
43 Agitator (toner stirring member)
44 TS cover
46 collection bag
46a welded part (furisode)
46b Tube sleeve
46c trunk
46d slit
46e Double-sided adhesive tape
47 Conveying screw
48 Waste toner
49 Blocking member
50 valves
51 Supply roller
52 Doctor Blade
53 Squee Sheet (Regulation Sheet)
54 DS casing
55 Waste toner discharge pipe
56 DS cover
57 Drum cover
58 Front stay
60 Conveying pipe
61 Waste toner receiving pipe
61a Exit hole
61b irregularities
61c lid
62 Drive shaft
63 Bearing
64 gear
65 packing
66a, 66b Side cover
67a TS top
67b TS bottom
71 Suction member
72 cap

Claims (5)

A waste toner collecting device having at least a waste toner collecting unit that collects waste toner that has been carried on an image carrier and has not contributed to image formation, and a waste toner discharging unit that discharges the waste toner to the waste toner collecting unit. In the image forming unit that is detachable from the image forming apparatus,
The waste toner discharging means is
A cylinder having one end closed and having at least one outlet in an intermediate region between the ends;
A waste toner transport member connected to the other end of the cylinder and transporting the waste toner to the discharge port;
Made from the tube disposed a valve in the outlet of, preventing suction of the waste toner when allowed to act the suction force in order to suction recovery into position where the waste toner present in the waste toner collecting portion blocking Members ,
An image forming unit comprising:   The image forming unit can be coupled with an image carrier unit including an image carrier on which an image to be developed with toner is formed, and the waste toner collecting unit is disposed in a predetermined space of a developer storage chamber for storing toner used for development. The image forming unit according to claim 1, wherein the image forming unit is a developing unit. The waste toner collecting part comprises a toner collecting bag that covers the cylinder and is connected to the cylinder at both ends of the cylinder, and the toner collecting bag has two sleeve parts and a collar part and a skirt part are closed. In the shape of a T-shirt, a cylinder is inserted into the toner collection bag through an opening of a pair of toner collection bags corresponding to both sleeves of the T-shirt, and a pair of toner collection bags the image forming unit according to claim 1, wherein a portion of the is characterized in that it is fixed in close contact with both ends of the tube. 4. The image forming unit according to claim 3, wherein the toner collection bag is made of a synthetic resin. The waste toner conveying member extends from the outside toward the other end of the cylinder and is connected to the other end, and extends from the toner conveying pipe to the cylinder and rotates in the toner conveying pipe and in the cylinder. the image forming unit according to claim 1, characterized in that it comprises a conveying screw.

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