JP4002781B2 - Image forming apparatus and copying machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an image forming apparatus and a copying machine.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, there is an electrophotographic image forming apparatus that forms an image by transferring a toner image formed on the surface of an image carrier (photosensitive member) onto a sheet or the like using an image forming unit. In an electrophotographic image forming apparatus, an image is generally formed using charged fine particles such as toner and carrier and a charged photoconductor, so that the image quality is poor due to the temperature and composition of the air inside the apparatus main body. Become stable. In particular, when an ionized substance such as humidity, ammonia gas, or a nitric acid compound is present, the charged state changes and the image quality becomes unstable. In addition, the ionized substance causes deterioration of the toner, carrier, etc., and shortens the life.
[0003]
Such a problem is not a big problem in a use environment where the air conditioning environment attached to the building called so-called office environment is prepared. For example, in a humid climate area, the inside of the device body becomes hot and the image quality is high. It is known that the image forming means becomes unstable, abnormal wear of the photoconductor occurs, the durability of the image forming means is remarkably reduced, and an abnormal image called “image flow” is generated. Various studies have been conducted on these causes, and it has been found that the problem is caused by the following mechanism.
[0004]
The charged fine particles such as toner and carrier used in the electrophotographic image forming apparatus are generally designed to stabilize the electrostatic charge state by adding a charge control agent to the polymer resin. Yes. However, the electrical properties of the polymer resin take in moisture in the air even if the hydrophobic treatment is exhausted, causing electrical resistance, frictional resistance between powders and changes in fluidity, and reducing the toner charge in the development process. The image quality may be reduced, resulting in image quality fluctuations such as an increase in density.
[0005]
Further, in a charger using a discharge phenomenon at the time of charging, a nitric acid compound is generated with discharge. When this nitric acid compound combines with moisture in the air, ionized substances such as nitric acid and nitrate are generated. When the generated ionized substance adheres to the surface of the photoconductor, deterioration of the photoconductor surface is accelerated and abnormalities of the photoconductor occur. Wear occurs, or the surface of the photoconductor is made conductive by an ionized substance, whereby the electrostatic latent image formed on the surface of the photoconductor is blurred and an “image flow” is generated.
[0006]
Since all of these problems are serious problems in an environment with high absolute humidity, it is a problem that can be improved by providing a dehumidifying device.
[0007]
However, when an electrophotographic apparatus is installed in the vicinity of a diazo-type copying machine that uses ammonia called blue printing, the ammonia gas generated in the diazo-type copying machine is separated from ammonium nitrate by the influence of discharge of the charging means in the image forming apparatus. Is done. This ammonium nitrate is a substance that is extremely harmful to the photoreceptor and has been shown to cause problems as well as moisture.
[0008]
In the image forming apparatus, ozone is generated due to the influence of the discharge of the charging unit. This ozone reduces the durability of the photoconductor, so in order to improve the durability of the photoconductor and improve the quality of the image formed, ionization of moisture, ammonia gas, nitrate compounds, etc. from the periphery of the photoconductor Substances, ozone, etc. need to be removed or reduced.
[0009]
For example, Japanese Patent Laid-Open No. 7-72770 discloses an electrophotographic image forming system in which adjusted air whose temperature and humidity are adjusted by an air conditioner is generated and the generated adjusted air is introduced into the environment of an image generating unit. An apparatus is disclosed. Further, the image forming apparatus disclosed in the publication generates adjusted air from which dust and ozone contained in the air coming out of the environment of the image generating unit are removed.
[0010]
In addition, for example, JP-A-6-130773 discloses a process cartridge including an image carrier and a plurality of developing devices provided around the image carrier, and an exposure irradiation opening for the image carrier. An image forming apparatus configured to prevent the scattering of toner by disposing a sealing unit between the exposure apparatus and the exposure apparatus that performs exposure through the section to restrict the inflow of air from the exposure irradiation opening to the process cartridge. Is disclosed.
[0011]
Further, Japanese Patent Publication No. 6-82234 provides an air flow path from the outside of the apparatus to the outside of the apparatus through the periphery of the charger in order to efficiently discharge ozone generated by the charger to the outside of the apparatus. An image forming apparatus configured as described above is disclosed. According to this publication, a part of the air flow path that intersects with the optical path emitted from the exposure lamp is formed by the transparent sealing member, so that the air flow path can be set without interfering with the light emitted from the exposure lamp. It becomes possible to be airtight.
[0012]
[Problems to be solved by the invention]
By the way, in an electrophotographic image forming apparatus, generally, toner is held in a toner container, and when the toner in the toner container runs out, it is replaced with another toner container filled with toner. It is possible to do.
[0013]
However, when the toner container is replaced, a factor that is harmful to image formation flows into the atmosphere of the toner container. Therefore, by replenishing the toner in this state, as in the above case, the image quality is deteriorated and the durability is decreased. Defects such as lowering occur. Such a problem also occurs in the techniques disclosed in the above-mentioned Japanese Patent Application Laid-Open Nos. 7-72770, 6-130773, and 6-82234.
[0014]
In the technique disclosed in Japanese Patent Application Laid-Open No. 7-72770, the temperature and humidity are adjusted, and the image quality is stabilized by supplying adjusted air from which dust and ozone are removed to the image forming unit. However, since the entire area in the apparatus main body is air-conditioned, an extremely large and costly air-conditioning means is required, and the market value is greatly impaired. As a result, the application range is limited to industrial machine applications such as printing presses, and there is a problem that it is difficult to expand to office machine applications such as copying machines and printers.
[0015]
Further, in the technique disclosed in Japanese Patent Laid-Open No. 6-130773, toner scattering is prevented by suppressing the generation of airflow from the exposure irradiation opening to the process cartridge by the function of the seal member. Since airtightness around the body is not ensured, air containing substances harmful to image formation enters from places other than the exposure irradiation opening, and it is difficult to eliminate the above-described problems caused by humidity and the like.
[0016]
In addition, in the technology disclosed in Japanese Examined Patent Publication No. 6-82234, since the outside air is directly guided to the charging means (charger) to exhaust the ozone generated by the discharge in the charger, the air conditioning is performed. Since no air is sent to the photosensitive member (photosensitive drum), the image quality cannot be stabilized effectively. Further, according to the technique disclosed in the publication, an ozone filter is provided in the exhaust path. However, since this is intended to reduce ozone in the exhaust, the air conditioning function inside the process cartridge cannot be exhibited.
[0017]
The object of the present invention is, for example, a reduction in image quality caused by a factor that is harmful to image formation in the image forming unit entering the toner case or toner container due to replacement of the toner container, and durability. It is to suppress the decrease of.
[0018]
Another object of the present invention is to reduce the size of the air-conditioning means, reduce the noise generated during the operation of the air-conditioning means, and the power consumption associated with the operation of the air-conditioning means, compared to the case where the entire apparatus body of the image forming apparatus is air-conditioned It is to be able to aim at reduction.
[0019]
[Means for Solving the Problems]
  An image forming apparatus according to a first aspect includes an image carrier, an electrophotographic image forming unit that forms a toner image on the image carrier, and a periphery of a toner container that holds a developer containing toner.DenseHarmful to image formation by a toner case forming a closed space, toner supply means for supplying toner held in the toner container to a specific image forming unit, and the image forming unit flowing into the toner case And a toner case air-conditioning means for removing various causative substances.
[0020]
  Therefore, the inflow of the factor substance into the toner container accommodated in the toner case is prevented. This prevents the toner held in the toner container from being influenced by the factor substance.
Further, an image forming case that houses the image carrier and the image forming unit and forms a sealed space around the image carrier excluding the transfer position of the toner image to the transfer target, and the image forming case And an image forming case air-conditioning means for removing the causative substance flowing into the apparatus.
Therefore, the inflow of the causal substance into the sealed space formed around the image carrier by the imaging case is prevented by the imaging case air conditioning unit.
Further, the toner case air-conditioning means and the image-forming case air-conditioning means communicate with the air intake side of the toner case and the air intake side of the image forming case, respectively, and send out air from which the factor substances have been removed. It is.
Therefore, the toner case air conditioning means and the image forming case air conditioning means can be realized by a single air conditioner.
Further, the exhaust side of the toner case and the exhaust side of the image forming case communicate with the intake side of the air conditioner.
Therefore, the factor substance contained in the air exhausted from the imaging case and the toner case is removed by the air conditioner, and the air from which the factor substance is removed is supplied again into the imaging case and the toner case. Thereby, air is circulated between the air conditioner and the image forming case, and between the air conditioner and the toner case.
[0021]
According to a second aspect of the present invention, in the image forming apparatus according to the first aspect, the toner supply unit includes an air pump that is provided in the toner case and feeds air into the toner container; A communication path that communicates with the image forming unit; and a screw pump that is provided in the communication path and includes a rotor having a spiral blade member around an axis.
[0022]
Therefore, the air in the toner case is sent into the toner container by the air pump, and the toner is supplied to the image forming unit by rotating the rotor of the screw pump in the communication path.
[0029]
  Claim3The described invention is claimed.1 or 2In the image forming apparatus, the air pump includes the air pump.singleAir from which the causative substance has been removed by an air conditioner is sent directly into the toner container.
[0030]
Here, “directly feeding into the toner container” means that air from which the air-conditioning apparatus has removed the factor substance is sent into the toner container only through the air pump. In addition, the fact that air from which the air-conditioner has removed the causative substance is sent into the toner container via a member other than an air pump, such as a toner case, for example, Into the container ”.
[0031]
Therefore, the air conditioned by the air conditioner is sent directly into the toner container by the air pump.
[0032]
  Claim4The invention described in claims 1 and 2Or 3The image forming apparatus described above includes a filter that is provided in the toner container and has a hole that is smaller than the particle size of the developer held in the toner container and allows air to pass therethrough.
[0033]
Therefore, the air enters and exits between the toner case and the toner container, and the scattering of powder such as toner is prevented.
[0034]
  Claim5The described invention is claimed.4In the image forming apparatus, the air exhausted from the toner container is allowed to pass through the filter.singleExhaust introduction means for introducing into the air conditioner is provided.
[0035]
Therefore, the air exhausted from the toner container is directly introduced into the air conditioner by the exhaust introduction means.
[0036]
  Claim6The described invention is claimed.5In the image forming apparatus, the toner caseDenseAn opening / closing member provided to be displaceable between a closed position that forms a closed space and an open position that opens the toner case to an extent that allows the toner container to be attached to and detached from the toner case; The means has one endsingleIn communication with the air conditioner, the other end side is provided in the opening and closing member, and the opening and closing member is positioned at the closed positionsingleWhen the air conditioner and the toner container are in communication with each other and the opening / closing member is positioned at the open position,singleThe air conditioner and the toner container are separated.
[0037]
Therefore, when the opening / closing member is positioned at the closed position, the air conditioner and the toner container are communicated, and when the opening / closing member is positioned at the open position, the air conditioner and the toner container are separated. .
[0038]
  Claim7The invention described in claims 1, 2, 3, 4, 5Or 6In the image forming apparatus described above, a plurality of toner cases are provided for each color of toner held in the toner container, and a plurality of image forming cases are provided corresponding to each toner case.
[0039]
  Therefore, for example, even when a plurality of toner cases and image forming cases are provided, such as a color image forming apparatus that forms a color image by superimposing the imaged toner images of each color, the claims 1, 2, 3, 4, 5Or 6The effects of the described invention can be obtained.
[0040]
  Claim8The copying machine according to the present invention includes reading means for reading an image of a document, and claims 1 to7And an image forming unit that forms an image read by the reading unit on a recording medium.
[0041]
  Accordingly, claims 1 to7A copying machine having the operation of the invention according to any one of the above is provided.
[0042]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. This embodiment shows an application example to an electrophotographic image forming apparatus.
[0043]
FIG. 1 is a longitudinal front view showing a schematic structure of the image forming apparatus according to the present embodiment. In the main body case 1 of the image forming apparatus A of the present embodiment, a paper discharge unit 3 from which a recording medium after image formation is discharged from a paper supply unit 2 on which recording media as transfer objects are stacked and held. A recording medium conveyance path 4 is formed. Examples of the recording medium include sheet-like paper. On the recording medium conveyance path 4, registration means 5 for adjusting the timing of conveyance of the recording medium conveyed in the recording medium conveyance path 4, an image forming module 6 for forming a toner image formed on the recording medium, and image forming A transfer means 7 for transferring the toner image formed by the module 6 to a recording medium, a fixing means 8 for fixing the toner image transferred to the recording medium, and the like are arranged. The fixing unit 8 fixes the toner image on the recording medium by, for example, heating and pressing the recording medium onto which the toner image has been transferred by a heating roller and a pressure roller.
[0044]
Further, in the main body case 1, an electrostatic latent image is formed on the outer peripheral surface of the photoreceptor 13, which will be described later, by emitting laser light that is latent image forming light in accordance with image data during an image forming operation in the image forming module 6. An exposure unit 9 for forming a toner, a toner supply unit 10 for holding a developer containing toner and supplying the toner to a developing unit 12 to be described later, and a factor that is harmful to image formation in the image forming module 6 from the air. An air conditioner 11 to be removed is provided.
[0045]
Although not particularly illustrated, the image forming apparatus A is provided with an intake unit that intakes air into the main body case 1 and an exhaust unit that exhausts air within the main body case 1. The intake means sucks air outside the main body case 1 into the main body case 1 through a slit-shaped opening (not shown) provided in the main body case 1. By sucking outside air into the main body case 1 by the intake means, the inside of the main body case 1 can be cooled. The exhaust means exhausts the air in the main body case 1 to the outside of the main body case 1 through a slit-shaped opening (not shown) provided in the main body case 1. By exhausting the air in the main body case 1 by the exhaust means, for example, the heat generated during the fixing operation by the fixing means 8 is exhausted to the outside of the main body case 1 and the inside of the main body case 1 can be cooled. Further, by discharging the air in the main body case 1 by the exhaust means, discharge products harmful to the image forming apparatus A such as ozone and nitrogen oxide generated during the charging operation by the charging means 14 described later are removed from the main body case 1. It becomes possible to evacuate. A temperature sensor (not shown) is provided in the vicinity of the exhaust means, and the exhaust means performs an exhaust operation according to the temperature detected by the temperature sensor.
[0046]
Next, the image forming module 6 will be described with reference to FIG. The image forming module 6 includes an image forming case that houses a developing unit 12 as a specific image forming unit, a photosensitive member 13 as an image carrier, a charging unit 14 as an image forming unit, and a cleaning unit 15 as an image forming unit. 16.
[0047]
The developing means 12 has a toner hopper 17 containing a powder such as toner having a particle size of about 5 to 200 μm, and supplies the toner to the photosensitive member 13 by the rotation of the developing roller 18. As a result, a toner image is formed on the surface of the photoreceptor 13. The density of the toner image formed on the surface of the photoreceptor 13 is detected by an image density sensor Sa provided in the image forming case 16. The toner density in the toner hopper 17 is detected by the toner density sensor Sb. The supply of toner into the toner hopper 17 described later is performed based on the detection result by the toner density sensor Sb.
[0048]
The cleaning unit 15 removes the toner remaining on the surface of the photoconductor 13 from the surface of the photoconductor 13 after the toner image is transferred to the recording medium, and collects the toner in the collected toner case 20. As a result, the next image forming operation can be continued. The surface of the photoreceptor 13 from which the remaining toner is removed by the cleaning unit 15 is neutralized by the neutralizing unit E.
[0049]
The toner hopper 17 and the collected toner case 20 have openings 17 a and 20 a at positions facing the photoconductor 13. Since the powder of toner or the like held in the toner hopper 17 and the collected toner case 20 has a particle size of about 5 to 200 μm, the openings 17a and 20a are provided with a seal member or the like, for example. The substantially hermeticity is maintained so that the powder does not scatter.
[0050]
However, the openings 17a and 20a provided at positions facing the photoreceptor 13 of the toner hopper 17 and the recovered toner case 20 are configured to be kept substantially sealed to the extent that powder such as toner is not scattered by a seal member or the like. However, during the image forming operation, an intake / exhaust airflow is generated in the openings 17a and 20a as the developing roller 18 and the cleaning roller 19 rotate, so that it is difficult to achieve a completely sealed state. For this reason, the developing unit 12 is provided with an exhaust ventilation opening (not shown) in the toner hopper 17 in order to prevent the powder from being blown out by the exhaust air flow from the inside to the outside of the developing unit 12 around the developing roller. It is also possible to provide a toner blocking filter that prevents the powder from being blown out.
[0051]
The image forming case 16 includes a transfer opening 21 for transferring a toner image formed on the surface of the photosensitive member 13 in the image forming module 6 to a recording medium, and a laser beam (latent latent light) emitted from the exposure unit 9. A slit-shaped exposure port 22 for exposing the outer peripheral surface of the photoconductor 13 with (image forming light) is formed. The exposure port 22 is covered with a transparent member 23 such as glass or resin, thereby enhancing the hermeticity of the space in the image forming module 6. The transparent member 23 is attached via a seal member such as a rubber packing (not shown) that improves the sealing between the transparent member 23 and the exposure port 22 as necessary. Thereby, the airtightness in the imaging case 16 can be improved.
[0052]
The image forming case 16 does not have an opening for communicating the inside and the outside of the image forming case 16 other than the transfer opening 21, and the atmosphere outside the image forming module 6 can enter the image forming case 16. There is no sex. Therefore, a substantially sealed space is formed around the photoreceptor 13 by the image forming case 16.
[0053]
In the “substantially sealed space” of the present embodiment, there is no opening in which the atmosphere outside the imaging module 6 may enter other than the transfer opening 21, and the inside and the outside of the imaging case 16 can be distinguished. In addition to meaning a space having a certain degree of hermeticity, it means a space having such a hermeticity that air conditioning by the air conditioner 11 can be performed by distinguishing between the inside and the outside of the imaging case 16.
[0054]
Further, the imaging case 16 is provided with an inlet 25 through which air flowing into the substantially enclosed space in the imaging case 16 passes and an outlet 26 through which air flowing out of the imaging case 16 passes. ing. In the image forming case 16, the air flowing into the image forming case 16 through the inflow port 25 passes through the substantially sealed space of the image forming case 16 to the outside of the image forming case 16 through the outflow port 26. A flow path (not shown) that communicates is formed.
[0055]
The image forming module 6 of the present embodiment is slidably supported with respect to the main body case 1 by a guide member (not shown) provided in the main body case 1. Thus, the image forming module 6 is provided so as to be able to be pulled out of the main body case 1 by being slid along the guide member and to be stored in the main body case 1. As a result, it is possible to repair and replace a group of components that need to be replaced due to their lifetime or failure, such as the developer held by the developing unit 12, the photosensitive member 13, the charging unit 14, and the cleaning unit 15.
[0056]
Next, the air conditioner 11 will be described. As shown in FIG. 3, the air conditioner 11 includes a pump 28 that sucks outside air into the storage case 27 and exhausts air inside the storage case 27 to the outside. Intake and exhaust by the pump 28 is performed via a suction port 29 and a delivery port 30 that are provided in the storage case 27 and communicate between the inside and the outside of the storage case 27.
[0057]
In the storage case 27 of the air conditioner 11, a photocatalyst means 31 and an ultraviolet light emitting means 32 for activating the photocatalyst means 31 are provided. The photocatalyst means 31 has a function of decomposing a nitrate compound or the like which is a factor (stability inhibiting factor) harmful to image formation existing in the air, and is, for example, titanium oxide.
[0058]
In the present embodiment, a substance that changes the charging characteristics of the toner or the carrier, a substance that changes the developing conditions in the developing unit 12, a substance that is harmful to the photosensitive member 13 generated by the charging by the charging unit 14, and the like. , As a causative substance harmful to image formation.
[0059]
The air conditioner 11 drives the pump 28 to decompose nitrate compounds and the like contained in the external air sucked into the storage case 27 through the suction port 29 by the photocatalyst means 31, and then removes the air in the storage case 27. Exhaust out of the storage case 27 through the delivery port 30.
[0060]
The air conditioner 11 according to the present embodiment decomposes a nitrate compound contained in the air in the storage case 27 by the photocatalyst means 31 activated by the ultraviolet light emitting means 32, thereby causing a harmful substance for image formation. However, the present invention is not limited to this, and the air conditioner may be any one that decomposes or removes a factor that is harmful to image formation contained in the air inside the storage case 27. For example, as shown in FIG. 4, in the storage case 27, there is a cooling dew condensation means 33 such as a Peltier element and an adsorption transport means 34 for discharging dew condensation from the evaporation part 34a to the outside of the storage case 27 mainly utilizing a capillary phenomenon. It is good also as air-conditioner 11 'which removes the factor substance harmful to image formation by providing the dehumidification apparatus 35 provided with and removing the water | moisture content contained in the air in the storage case 27 by the dehumidification apparatus 35. FIG. Further, for example, an air conditioner (not shown) that decomposes factor substances harmful to image formation in the image forming module 6 by adsorbing and removing ammonia ions generated from ammonia gas or the like by an ion adsorbing substance (not shown). ).
[0061]
In addition, the “factory substance harmful to image formation” targeted by the air conditioner 11 is not limited to a single factor substance. For example, the photocatalyst unit 31, the ultraviolet light emitting unit 32, and the dehumidifier 35 described above. In addition, a plurality of factor substances may be decomposed or removed.
[0062]
As shown in FIG. 5, the imaging case 16 of the imaging module 6 and the storage case 27 of the air conditioner 11 are connected to the inlet 25, the outlet 30 and the outlet 26 and the inlet by tubular connecting means 36a and 36b. 29 are communicated with each other. The air conditioner 11 sends the conditioned air to the image forming case 16 through the outlet 30, the connecting means 36 a, and the inlet 25. In addition, the air conditioner 11 sucks the air in the imaging case 16 into the storage case 27 through the outlet 26, the connection means 36 b and the suction port 29, and moisture contained in the air exhausted from the imaging case 16, Ionizing substances such as nitrate compounds and ammonia gas and other substances that are harmful to image formation by the image forming module 6 are removed or reduced and supplied again into the image forming case 16.
[0063]
In the present embodiment, the connecting means 36a and 36b allow the inlet 25 and the outlet 30 and the outlet 26 and the inlet 29 to communicate with each other, so that air flows between the image forming module 6 and the air conditioner 11. However, this is not a limitation.
[0064]
For example, as shown in FIG. 6, the inlet 29 and the outlet 26 may be opened to the outside by using a tubular connecting means 36 'such as a pipe as required. As a result, the air conditioner 11 sucks outside air into the storage case 27 for air conditioning, and after the conditioned air is supplied into the image forming module 6, the air conditioner 11 is connected to the outside of the image forming module 6 through the outlet 26. Is exhausted.
[0065]
Further, for example, as shown in FIG. 7, non-contact type developing means 12 ′ having a developing sleeve 18 ′ arranged in a non-contact manner and opposed to the photoconductor 13 is provided, and conditioned air supplied through an inlet 25. May be discharged to the outside of the image forming module 6 ′ through a gap G formed between the photosensitive member 13 and the developing sleeve 18 ′. At this time, the outlet 26 is not formed in the image forming case 16. Accordingly, it is not necessary to provide an opening (outflow port 26) for exhaust in the image forming case 16, so that the sealing performance in the image forming module 6 'can be improved.
[0066]
Next, the toner supply unit 10 will be described. The toner supply unit 10 includes a toner case 40 whose inside is a substantially sealed space, and a toner container 41 that holds a developer containing toner is provided in the toner case 40.
[0067]
Note that the “substantially sealed space” referred to here has the same level of sealing ability as the above described “substantially sealed space” in the image forming case 16 so that the inside and the outside of the toner case 40 can be distinguished. This means that the air conditioning by the toner air-conditioning means 44 is performed separately from the outside of the toner case 40 and has a sealing property that can prevent the toner from scattering outside the toner container 41.
[0068]
The toner container 41 is provided detachably with respect to the toner case 40. When the toner runs out, the toner container 41 can be replaced with another toner container 41 filled with toner. The toner container 41 is provided with a filter 42 having a hole which allows air to pass therethrough and prevents passage of powder such as toner held in the toner container 41. The air in the toner case 40 and the air in the toner container 41 are efficiently adapted to each other through the filter 42 and are in the same environment. Since the filter 42 is provided, the toner in the toner container 41 is not scattered outside the toner container 41 even when the air in the toner case 40 and the air in the toner container 41 are mixed. .
[0069]
The toner case 40 is provided with the other end of a toner conveyance path 43 as a tubular communication path with one end communicating with the toner hopper 17 of the developing unit 12. The other end of the toner conveyance path 43 communicates with the toner container 41 in the toner case 40. The toner transport path 43 is provided with a transfer screw (not shown). The transfer screw is rotated by driving means (not shown) such as a motor to transfer (supply) the toner in the toner conveyance path 43 from the toner container 41 into the toner hopper 17. Here, the function as the toner supply means is realized.
[0070]
The toner case 40 is provided with a toner air-conditioning means 44 that air-conditions the toner case 40 by removing or reducing factors that are harmful to image formation contained in the air. The toner air-conditioning means 44 of the present embodiment adjusts the humidity in the air in the toner case 40 so that the toner charging characteristics are good for image formation.
[0071]
In the present exemplary embodiment, the toner air-conditioning unit 44 that adjusts the humidity in the air in the toner case 40 is used. However, the present invention is not limited to this, and factors that adversely affect the state of the toner transferred into the toner hopper 17. Any material that removes substances may be used.
[0072]
In addition, the toner air-conditioning unit 44 is not limited to the removal of a factor that adversely affects the toner state. For example, the toner air-conditioning unit 44 is included in the air inside the toner case 40 and is formed by the image forming module 6 as in the air-conditioning device 11. It is also possible to remove a factor substance that adversely affects the image forming operation.
[0073]
In addition, the image forming apparatus A is provided with a control system that drives and controls each unit included in the image forming apparatus A. Each unit such as the image forming module 6, the toner supply unit 10, the air conditioner 11, and the toner air conditioner 44 is driven and controlled by a control system.
[0074]
In such a configuration, when the pump 28 of the air conditioner 11 is driven, air is sucked into the storage case 27 and the air in the storage case 27 is sent to the image forming module 6. At this time, since the nitrate compound contained in the air in the storage case 27 is decomposed by the photocatalyst means 31, the air fed into the image forming case 12 from the inlet 25 contains the nitrate compound. Even if it is contained, it becomes a trace amount. Here, the function as the image forming case air conditioning means is realized.
[0075]
In the image forming operation of the image forming module 6, an ionizing substance such as nitric acid or a nitric acid compound is generated in the image forming case 16 by charging the photosensitive member 13 with the charging unit 14. Is discharged to the outside of the imaging case 16 by the conditioned air supplied from the air conditioner 11 into the imaging case 16. This prevents a causative substance that is harmful to image formation from staying around the photosensitive member 13.
[0076]
As a result, it is possible to prevent causative substances such as ionized substances from adhering to the image carrier, and to reduce the size of the air-conditioning means and the air-conditioning means compared to the case where the entire apparatus main body of the image forming apparatus is air-conditioned. Therefore, it is possible to reduce the noise generated during the operation and the power consumption accompanying the operation of the air-conditioning means, and to keep the inside of the image forming case 16 in a good state for image formation.
[0077]
In addition, in the present embodiment, since air circulates between the air conditioner 11 and the image forming module 6, the air conditioner 11 is air-conditioned compared to the entire space inside the main body case 1 of the image forming apparatus A. The amount of target air is greatly limited to significantly reduce the control capability required by the air conditioner 11, and, for example, a factor substance that enters from the outside such as moisture and adversely affects image formation is formed in the image forming case 16. In addition, the toner can be prevented from entering the toner case 40.
[0078]
Further, by removing moisture contained in the air in the toner case 40 by the toner air-conditioning means 44, the environment inside the toner container 41 communicated with the inside of the toner case 40 through the filter 42 is changed in the toner case 40. Therefore, the toner supplied into the toner hopper 17 via the toner conveyance path 43 does not contain moisture, and even if it is contained, the amount is very small. Here, the function as the toner case air conditioning means is realized.
[0079]
Here, the inflow of the factor substance into the toner container accommodated in the toner case is prevented, and the toner held in the toner container is prevented from being affected by the factor substance. By supplying toner from the toner container 41 to the image forming case 16, the environment in the image forming module 6 is made good for image formation without deteriorating the environment in the image forming module 6. Can be maintained.
[0080]
As a result, it is possible to stabilize the charged state of the toner and prevent a causative substance such as an ionized substance from adhering to the image carrier. For example, by replacing the toner container or the like, In addition, it is possible to suppress deterioration in image quality and deterioration in durability caused by a factor that is harmful to image formation in the image formation module.
[0081]
In this embodiment, air conditioning is performed using the air conditioner 11 shown in FIG. 3, but in the case where the air conditioner 11 ′ having the dehumidifier 35 as shown in FIG. The moisture contained in the air is removed, and the air exhausted from the outlet 30 does not contain moisture or is contained in a trace amount. At this time, as shown in FIG. 5, by connecting the air conditioner 11 and the image forming module 6 so that air circulates between the storage case 27 and the image forming case 16, for example, moisture or the like enters. Therefore, adverse effects caused by harmful substances entering from the outside can be more effectively suppressed.
[0082]
Further, in the case of an air conditioner provided with an ion adsorbing substance in the storage case 27, ammonia ions and the like contained in the air in the storage case 27 are adsorbed by the ion adsorbing substance and are sent from the outlet 30. The exhausted air does not contain ammonia ions, or even if it contains them, it becomes a trace amount.
[0083]
In addition, in the air conditioner 11 provided with the ozone decomposing means in the storage case 27, the ozone contained in the air in the storage case 27 is decomposed by the ozone decomposing means. Does not contain ozone, or even if it contains a trace amount.
[0084]
Next, a second embodiment of the present invention will be described with reference to FIG. The same parts as those in the first embodiment are denoted by the same reference numerals, and description thereof is also omitted. The same shall apply hereinafter.
[0085]
FIG. 8 is a longitudinal front view showing a schematic structure of the image forming apparatus of the present embodiment. The image forming apparatus B of the present embodiment does not have the toner air conditioning unit 44 in the toner case 40, and the air conditioning in the image forming case 16 and the air conditioning in the toner case 40 are performed by the single air conditioner 11. This is different from the first embodiment.
[0086]
As shown in FIG. 8, the toner case 40 is provided with an inflow port 50 and an outflow port 51 that communicate the inside and outside of the toner case 40, and the storage case 27 has an inside and outside of the storage case 27. Are provided with a delivery port 52 and a suction port 53. The inlet 50 and the outlet 52, and the outlet 51 and the inlet 53 are communicated with each other via tubular air-conditioning circulation paths 54a and 54b.
[0087]
In such a configuration, when the pump 28 of the air conditioner 11 is driven, the air conditioned in the storage case 27 is sent to the outside of the storage case 27 via the outlet 30 and the outlet 52. From the outlet 30, air from which a factor harmful to image formation in the image forming module 6 has been removed is sent out, and this air is supplied into the image forming case 16 through the connection means 36 a and the inlet 25. . Here, the function as the image forming case air conditioning means is realized. Further, air from which a factor that is harmful to image formation in the image forming module 6 is removed is sent out from the delivery port 52, and this air is supplied into the toner case 40 through the air conditioning circulation path 54 a and the inflow port 50. Is done. Here, the function as the toner case air conditioning means is realized.
[0088]
The air exhausted from the image forming case 12 through the outlet 26 is sucked into the storage case 27 through the connection means 36 b and the suction port 29, and exhausted from the toner case 40 through the outlet 51. The air is sucked into the storage case 27 through the air conditioning circulation path 54 b and the suction port 53. The air conditioner 11 removes a factor harmful to the image formation contained in the air sucked from the suction ports 29 and 53 and supplies it again to the image forming case 12 and the toner case 40. This also realizes functions as an image forming case air conditioning unit and a toner case air conditioning unit.
[0089]
As in the present embodiment, the air conditioned by the single air conditioner 11 is sent into the image forming case 16 and the toner case 40 to air-condition the image forming case 16 and the toner case 40, respectively. Heat generation in the main body 1 can be suppressed, and generation of problems such as melting of the toner in the image forming module 6 and the toner case 40 due to heat generated by driving the air conditioner 11 can be prevented, and image quality can be stabilized. And durability of the photoconductor 13 and the like can be improved.
[0090]
In addition, the air conditioning apparatus 11 is air-conditioned by the single air conditioning apparatus 11, compared with the case where an air conditioning apparatus is provided corresponding to each of the imaging case 16 and the toner case 40. 11 can be reduced, noise generated during operation of the air conditioner 11 can be reduced, and power consumption associated with the operation of the air conditioner can be reduced.
[0091]
Further, by circulating air between the air conditioner 11 and the image forming case 16 and between the air conditioner 11 and the toner case 40, the air amount that the air conditioner 11 is subject to air conditioning is greatly limited. For example, the control ability required by the apparatus 11 is significantly reduced and, for example, a factor substance that enters from the outside such as moisture and adversely affects image formation is prevented from entering the image formation case 16 and the toner case 40. Therefore, it is possible to more effectively reduce the size of the air conditioner 11, reduce the noise generated during the operation of the air conditioner 11, and reduce the power consumption associated with the operation of the air conditioner 11.
[0092]
Next, a third embodiment of the present invention will be described with reference to FIG. 9 and FIG. The present embodiment is different from the second embodiment in the structure of the toner supply unit 10.
[0093]
FIG. 9 is a longitudinal front view showing a schematic structure of the image forming apparatus of the present embodiment. In the toner case 40 of the image forming apparatus C of the present embodiment, the toner container 41 is disposed in the vicinity of the communication position between the toner container 41 and the toner conveyance path 43, and the air in the toner case 40 is sucked into the toner container 41. An air pump 60 that feeds air therein is provided. The toner conveyance path 43 of the present embodiment is formed by a flexible tube.
[0094]
A configuration of a connection portion between the communication position of the toner container 41 and the toner conveyance path 43 and the air pump 60 is the same as the configuration disclosed in, for example, Japanese Patent Laid-Open No. 2000-356898, Japanese Patent Laid-Open No. 11-258961, and the like. Although not described in detail, one end of a connecting pipe 61 having a diameter smaller than the opening diameter of the opening 41a is inserted inside the opening 41a of the toner container 41 as shown in FIG. . The other end of the connection pipe 61 communicates with the toner conveyance path 43. The connecting pipe 61 is inserted into the opening 41a of the toner container 41 via an elastic member 62 such as rubber or sponge, so that the sealing of the opening 41a of the toner container 41 is ensured.
[0095]
The connecting pipe 61 has a double pipe structure of an air flow path pipe 61a provided on the outer peripheral side and a toner discharge pipe 61b provided on the inner peripheral side between the outer sides, and the toner container of the toner discharge pipe 61b. An opening 61c for discharging toner is formed on the 41 side. A branch pipe 61d branched from the middle communicates with the air flow path pipe 61a. The air pump 60 described above is provided at the tip of the branch pipe 61d. When the air pump 60 is operated, air is sent from the air pump 60 into the toner container 41, and the sent air forms an air flow in the toner container 41. The toner in the toner container 41 is fluidized by this air flow.
[0096]
A screw pump 63 is provided at the end of the toner conveyance path 43 on the image forming module 6 side. Although the description is omitted because it is a known technique, the screw pump 63 is formed in a two-screw configuration and a rotor (not shown) provided in the toner conveyance path 43 and having a spiral blade member around the axis. It includes a stator that is fixedly installed. The rotor is driven to rotate by receiving a driving force from a driving means (not shown) such as a motor. The screw pump 63 generates a strong self-priming force when the rotor is driven to rotate. During the toner supply operation, the toner in the toner container 41 is sucked out and supplied to the toner hopper 17 by the self-suction force generated by the screw pump 63. Here, the function as the toner supply means is realized.
[0097]
Note that the intake side of the storage case 27 and the exhaust side of the toner case 40 supply the conditioned air sent from the storage case 27 into the toner case 40 and suck the air in the toner case 40 into the storage case 27. The structure is such that air can be circulated between the storage case 27 and the toner case 40.
[0098]
In such a configuration, when the pump 28 of the air conditioner 11 is driven, the air that has been air-conditioned in the storage case 27 and from which causative substances harmful to image formation in the image forming module 6 have been removed is formed in the image forming case. 16 and the toner case 40. Here, functions as an image forming case air conditioning unit and a toner case air conditioning unit are realized.
[0099]
More specifically, the conditioned air sent into the imaging case 16 from the storage case 27 through the outlet 30, the connecting means 36 a, and the inlet 25 fills the imaging case 16, and the outlet 26, It is sucked into the storage case 27 through the connecting means 36 b and the suction port 29. On the other hand, the conditioned air sent into the toner case 40 from the storage case 27 through the delivery port 52, the air circulation path 54a, and the inflow port 50 is filled in the toner case 40, and the outflow port 51 and the air circulation path 54b. Then, it is sucked into the storage case 27 through the suction port 53.
[0100]
Further, when the rotor is driven to rotate, the toner in the toner container 41 is sucked out and supplied to the toner hopper 17. When the air pump 60 is operated in accordance with the operation of the screw pump 63, the toner in the toner container 41 is fluidized by the air flow formed by the air sent from the air pump 60. The toner supply can be stabilized without depending on the toner supply direction. In addition, since the toner conveyance path 43 is formed by a flexible tube, the degree of freedom in the layout of the image forming module 6 and the toner container 41, that is, the toner case 40 can be increased without limiting the toner supply direction from the upper side to the lower side. Can be improved.
[0101]
In addition, since the air pump 60 feeds air into the toner container 41 is air-conditioned air in the toner case 40, feeding air into the toner container 41 does not adversely affect the chargeability of the toner. The toner container 41 can be air-conditioned more quickly.
[0102]
Next, a fourth embodiment of the present invention will be described with reference to FIG. This embodiment is different from the third embodiment in the intake position of the air that the air pump 60 sends into the toner container 41.
[0103]
FIG. 11 is a longitudinal front view showing a schematic structure of the image forming apparatus of the present embodiment. An air pump 60 provided in the toner case 40 is communicated with the delivery port 52 of the storage case 27 of the image forming apparatus D of the present embodiment via a tubular air conveyance path 70. The air pump 60 of the present embodiment supplies the conditioned air sent from the storage case 27 through the air conveyance path 70 into the toner container 41.
[0104]
In such a configuration, when the pump 28 of the air conditioner 11 is driven, air that has been air-conditioned in the storage case 27 and from which a causative substance harmful to image formation in the image forming module 6 has been removed becomes the outlet 30. After being filled into the image forming case 16 through the connecting means 36 a and the inlet 25, the image forming case 16 is filled and then sucked into the storage case 27 through the outlet 26, the connecting means 36 b and the inlet 29. Is done. Here, the function as the image forming case air conditioning means is realized.
[0105]
When the air pump 60 is driven, the conditioned air from which the harmful substances for image formation in the image forming module 6 are removed from the storage case 27 through the delivery port 52 and the air conveyance path 70 enters the toner container 41. Is sent to. Then, after the toner container 41 is filled, the toner case 40 is filled through the filter 42 to air-condition the toner case 40. Here, the function as the toner case air conditioning means is realized. The air conditioned by the air conditioner 11 is directly sent into the toner container 41 by the air pump 60, whereby the toner container 41 is air-conditioned more quickly and the toner case 40 is air-conditioned indirectly. Compared with the case of air conditioning, the target air conditioning space can be made smaller and the air conditioning efficiency can be improved.
[0106]
Further, since the toner container 41 is provided with a filter 42, even when air is fed into the toner container 41, the pressure in the toner container 41 is prevented from excessively rising, and the toner is contained in the toner container 41. It is prevented from splashing outside.
[0107]
Next, a fifth embodiment of the present invention will be described with reference to FIG. This embodiment is different from the fourth embodiment in the communication state between the toner case 40 and the storage case 27.
[0108]
FIG. 12 is a longitudinal front view showing a schematic structure of the image forming apparatus of the present embodiment. The image forming apparatus F according to the present embodiment has a connection path 80 serving as an exhaust introduction unit having one end communicating with the suction port 53 of the storage case 27, passing through the toner case 40 and communicating with the toner container 41 at the other end. I have. The other end of the connection path 80 is positioned at a filter 42 portion provided in the toner container 41, and the connection path 80 and the inside of the toner container 41 are communicated via the filter 42. The connection path 80 of the present embodiment is formed by a tubular member such as a flexible tube. The connection path 80 and the toner case 40 are sealed with a sealing member such as resin or rubber, for example.
[0109]
In such a configuration, the air conditioned in the storage case 27 is sent into the image forming case 16 and the toner case 40 by driving the pump 28 of the air conditioner 11. The conditioned air sent from the storage case 27 into the image forming case 16 through the outlet 30, the connecting means 36 a, and the inlet 25 fills the image forming case 16, and flows into the outlet 26, the connecting means 36 b, and the suction. It is sucked into the storage case 27 through the mouth 29. Here, the function as the image forming case air conditioning means is realized.
[0110]
When the air pump 60 is driven, conditioned air is sent from the storage case 27 into the toner container 41 via the outlet 52 and the air conveyance path 70, and a part of the conditioned air sent into the toner container 41. Fills the toner case 40 via the filter 42 and air-conditions the toner case 40. Here, the function as the toner case air conditioning means is realized. Then, after the toner container 41 is filled, the filter 42 and the connection path 80 are sucked into the storage case 27 through the suction port 53 and are again subjected to air conditioning. Thereby, since the air conditioned by the air conditioner 11 is directly sent into the toner container 41 by the air pump 60, the toner container 41 can be air-conditioned more quickly, and the toner case 40 can be air-conditioned by air-conditioning the toner case 40. Compared with the case where the inside of the container 41 is indirectly air-conditioned, the target air-conditioned space can be reduced to improve the air-conditioning efficiency.
[0111]
In the present embodiment, since the toner container 41 and the storage case 27 are communicated with each other via the connection path 80, the air sent into the toner container 41 and pushed out to the toner case 40 via the filter 42 The pressure in the toner case 40 is not increased excessively.
[0112]
Next, a sixth embodiment of the present invention will be described with reference to FIG. This embodiment is different from the fifth embodiment in the communication state between the toner container 41 and the storage case 27.
[0113]
FIG. 13 is a longitudinal front view showing a part of the schematic structure of the image forming apparatus of the present embodiment. The toner container 41 is provided with an annular connected member 90 in which one end of the connection path 80 is removably fitted at a position where the filter 42 is provided. The connected member 90 has a shape that allows air to flow, such as a pipe. The to-be-connected member 90 has a shape with a thin tip, and this facilitates the insertion / extraction of the connection path 80 with respect to the to-be-connected member 90.
[0114]
The toner case 40 has a closed position for sealing the inside of the toner case 40 (see FIG. 13A) and an open position for opening the inside of the toner case 40 to an extent that allows the toner container 41 to be attached to and detached from the toner case 40 (see FIG. 13). (see (b)), and an openable / closable member 91 is provided. The connection path 80 is fixedly provided on the opening / closing member 91 so as to penetrate the opening / closing member 91, and communicates with the connected member 90 in a state where the opening / closing member 91 is positioned at the closed position. Is inserted into and removed from the connected member 90 in accordance with the displacement of the opening / closing member 91 so as to be separated from the connected member 90 in a state where the opening / closing member 91 is positioned at the open position.
[0115]
In such a configuration, when the toner container 41 is exchanged, the connection path 80 fitted to the connected member 90 is simply connected to the connected member 90 simply by positioning the open / close member 91 positioned at the closed position. 90, the toner container 41 in the toner case 40 can be exposed. As a result, the same effects as those of the image forming apparatus F of the fifth embodiment can be obtained, and workability when the toner container 41 is replaced can be improved.
[0116]
Next, a seventh embodiment of the present invention will be described with reference to FIG. This embodiment shows an application example to a tandem color image forming apparatus having a plurality of image forming modules as an image forming apparatus.
[0117]
FIG. 14 is a longitudinal front view showing a schematic structure of the color image forming apparatus of the present embodiment. In the main body case 1 of the color image forming apparatus G of the present embodiment, a recording medium conveyance path 4 from the paper feed unit 2 to the paper discharge unit 3 is formed. On the recording medium conveyance path 4, there are arranged a registration unit 5, an image forming unit 100 including four image forming modules 6 (6Y, 6M, 6C, 6B), a fixing unit 8, and the like.
[0118]
Here, the subscripts Y, M, C, and B attached to the image forming module 6 (6Y, 6M, 6C, and 6B) are the colors of the formed image (Y is yellow, M is magenta, C is cyan, B means black). The same shall apply hereinafter.
[0119]
The image forming unit 100 includes a transfer belt 101 disposed so as to face the four image forming modules 6Y, 6M, 6C, and 6B through the recording medium conveyance path 4, and four image forming units through the transfer belt 101. Four transfer means 7 (7Y, 7M, 7C, 7B) arranged to face the modules 6Y, 6M, 6C, 6B are provided. The transfer belt 101 has an endless belt shape wound around a pair of rollers 102, and is arranged so that the outer peripheral surface faces each of the photoreceptors of the four image forming modules 6Y, 6M, 6C, and 6B. Yes. The transfer means 7 (7Y, 7M, 7C, 7B) is disposed on the inner peripheral side of the endless belt-shaped transfer belt 101. Further, the image forming unit 100 includes a belt cleaner 102 that removes toner and the like remaining on the transfer belt 101.
[0120]
Each of the image forming modules 6Y, 6M, 6C, and 6B is connected with a toner supply unit 10 (10Y, 10M, 10C, and 10B) similar to the toner supply unit 10 illustrated in FIG. Toner of the color to be supplied is supplied.
[0121]
In the image forming module 6 (6Y, 6M, 6C, 6B) and the toner supply unit 10 (10Y, 10M, 10C, 10B) in the image forming means 100, image forming cases 16 (16Y, 16M, 16C, 16B), The air conditioners 11 (11Y, 11M, 11C, and 11B) that air-condition the interiors of the toner cases 40 (40Y, 40M, 40C, and 40B) are associated with each other. Each image forming case 16 of each image forming module 6 (6Y, 6M, 6C, 6B) and each storage case 27 of each air conditioner 11 (11Y, 11M, 11C, 11B) communicate with each other via a connecting means 36. Has been. Each toner case 40 (40Y, 40M, 40C, 40B) of each toner supply unit 10 (10Y, 10M, 10C, 10B) and each storage case 27 of each air conditioner 11 (11Y, 11M, 11C, 11B) The air communication path 70 and the connection path 80 communicate with each other.
[0122]
In such a configuration, by driving the pump 28 of each air conditioner 11 (11Y, 11M, 11C, 11B), air conditioning in the corresponding image forming case 16 (16Y, 16M, 16C, 16B) is performed. Is called. Thereby, also in the color image forming apparatus G having the plurality of image forming modules 6 (6Y, 6M, 6C, 6B), the same effect as described above can be obtained.
[0123]
By the way, in the color image forming apparatus G of the tandem system, for example, the distance from the heat source such as the fixing unit 8 or the airflow around each image forming module 6 (6Y, 6M, 6C, 6B) in relation to the arrangement, The environment differs for each image forming module 6 (6Y, 6M, 6C, 6B) due to the number of operations of the photoconductor 13 and the charging means 14 in each image forming module 6 (6Y, 6M, 6C, 6B). .
[0124]
In the color image forming apparatus G of the present embodiment, the air conditioners 11 (11Y, 11Y, 10C, 10B) and the toner supply units 10 (10Y, 10M, 10C, 10B) and the image forming modules 6 (6Y, 6M, 6C, 6B) are provided. 11M, 11C, 11B) are associated with each other, and by controlling the air conditioners 11 (11Y, 11M, 11C, 11B) individually, air conditioning suitable for the properties of the toner of each color can be performed. . This makes it possible to maintain an optimum environment for each of the image forming modules 6 (6Y, 6M, 6C, 6B). Therefore, the image quality in the color image forming apparatus G that holds a plurality of color toners having different properties for each color. Can be stabilized.
[0125]
In the present embodiment, by using an air conditioning method similar to that of the fifth embodiment, each image forming case 16 (16Y, 16M, 16C, However, the present invention is not limited to this, and each image forming case 16 (16Y, 16M, 16C, 16C, 16C, 16C, 16C, 16B) may be air-conditioned. Further, as described in the sixth embodiment, when separation / communication between the toner container 41 and the storage case 27 is performed according to the opening / closing of the opening / closing member 91, the opening / closing member in each toner case 40. 91 is not limited to the form in which the upper part is opened. For example, the structure may be opened to the front or side.
[0126]
Next, an eighth embodiment of the present invention will be described with reference to FIG. This embodiment shows an application example to a tandem color image forming apparatus as an image forming apparatus.
[0127]
FIG. 15 is a longitudinal front view showing a schematic structure of the electrophotographic color image forming apparatus of the present embodiment. The color image forming apparatus H of the present embodiment transfers the toner image formed by each image forming module 6 (6Y, 6M, 6C, 6B) to a recording medium via an intermediate transfer belt 110 as a transfer target. Unlike the seventh embodiment, the intermediate point arranged in the image forming means 100 so as to face the four image forming modules 6Y, 6M, 6C and 6B and to partially face the recording medium conveyance path 4 A transfer belt 110 is included. The transfer means 7 (7Y, 7M, 7C, 7B) are arranged to face each image forming module 6 (6Y, 6M, 6C, 6B) via the intermediate transfer belt 110.
[0128]
In addition, the image forming unit 100 includes a sheet transfer unit 7 ′ disposed opposite to the intermediate transfer belt 110 with the recording medium conveyance path 4 therebetween, and an intermediate transfer cleaning unit that removes toner remaining on the intermediate transfer belt 110. 111.
[0129]
In such a configuration, for example, even when the toner container 41 or the like is replaced, a substance that is harmful to image formation in the image forming module 6 may enter the toner case 40 or the toner container 41. By adjusting the air in the substantially sealed space 16 and the toner case 40 to remove a factor that is harmful to image formation, a space that is significantly smaller than the entire space in the main body case 1 of the image forming apparatus H. By simply air-conditioning the toner, it is possible to stabilize the charged state of the toner and prevent the ionized substance from adhering to the photosensitive member 13 and the like, thereby stabilizing the image quality and improving the durability of the apparatus. Compared with the case where the entire apparatus main body of the image forming apparatus H is air-conditioned, the air conditioner 11 is downsized, the noise generated during the operation of the air conditioner 11 is reduced, and the power consumption associated with the operation of the air conditioner 11 is reduced. It can be reduced.
[0130]
Next, a ninth embodiment of the present invention will be described with reference to FIG. This embodiment shows an application example to a copying machine.
[0131]
FIG. 16 is a longitudinal front view showing a schematic structure of the copying machine according to the present embodiment. The copying machine 150 includes an image reading device 151 that reads an image of a document, and an image forming device A that forms an image read by the image reading device 151 on a sheet.
[0132]
Although not described because it is a known technique, the image reading apparatus 151 exposes the contact glass 152 on which the document is placed and the image of the document placed on the contact glass 152 through the contact glass 152. An exposure optical system 153 that scans and a reading sensor 154 that optically reads a document image exposed and scanned by the exposure optical system 153 are provided. The exposure optical system 153 includes a light source 155 that emits light and mirrors 156, 157, and 158 that guide reflected light from the document to the reading sensor 154. The light source 155 and the mirrors 156, 157, and 158 are formed on the contact glass 152. It is mounted on traveling bodies 159 and 160 that reciprocate at a speed ratio of 2: 1 along.
[0133]
In such a configuration, when the image copying operation is performed, the document image is exposed and scanned by running the traveling bodies 159 and 160 with the light source 155 turned on, and the document image is read. Here, the function as the reading means is realized. Further, the exposure unit 9 exposes and scans the photosensitive member 13 based on the read image data that has been read. Thereafter, an image is formed on the paper in the same manner as described above. Here, the function as the image forming means is realized.
[0134]
According to the copying machine 150 of the present embodiment, the same effects as the effects of the image forming apparatus A of each embodiment described above can be achieved.
[0135]
In this embodiment, the image read by the image reading device 151 is formed on a sheet by the image forming device A. However, the present invention is not limited to this, and the above-described image formation is performed instead of the image forming device A. Any of the image forming apparatuses B, C, D, F, G, and H may be used.
[0136]
【The invention's effect】
  According to the image forming apparatus of the first aspect, the factor substance is prevented from flowing into the toner container housed in the toner case, and the toner held in the toner container is affected by the factor substance. By preventing this, it becomes possible to stabilize the charged state of the toner, so that it is possible to prevent a causative substance such as an ionized substance from adhering to the image carrier. As a result, for example, deterioration of image quality and deterioration of durability caused by substances that are harmful to image formation in the image forming module enter the toner case or toner container due to replacement of the toner container. Can be suppressed.
Furthermore, by preventing the inflow of causative substances into the sealed space formed around the image carrier by the imaging case, it is possible to prevent the causative substances such as ionized substances from adhering to the image carrier. Compared with the case where the entire apparatus main body of the image forming apparatus is air-conditioned, it is possible to reduce the size of the air-conditioning means, reduce the noise generated during the operation of the air-conditioning means, and reduce the power consumption associated with the operation of the air-conditioning means. .
Furthermore, since the toner case air-conditioning means and the image forming case air-conditioning means can be realized by a single air conditioner, compared to the case where a plurality of air conditioners are provided corresponding to each of the image forming module and the toner case. It is possible to reduce the size of the air conditioner, reduce the noise generated during the operation of the air conditioner, and reduce the power consumption associated with the operation of the air conditioner. In addition, for example, by disposing a single air conditioner away from the toner case and the image forming case, it is possible to prevent the occurrence of problems such as toner melting due to heat generated by the operation of the air conditioner.
Further, the air-conditioning device removes the causative substance contained in the air exhausted from the imaging case and the toner case, and supplies the air again into the imaging case and the toner case. By circulating air between the air conditioner and the toner case, for example, it is possible to prevent the entry of factors that are harmful to image formation, such as moisture, from the outside and always air-condition the same air. As a result, it is possible to significantly limit the amount of air that the air conditioner is subject to air conditioning and to greatly reduce the control capability required by the air conditioner. Thus, in addition to the effect of the invention of claim 4, it is possible to more effectively reduce the size of the air conditioner, reduce the noise generated during the operation of the air conditioner, and reduce the power consumption associated with the operation of the air conditioner. it can.
[0137]
  According to the second aspect of the present invention, in the image forming apparatus according to the first aspect, the air in the toner case is sent into the toner container by the air pump, whereby the air inside the toner container is air-conditioned more quickly and By supplying toner to the image forming unit by fluidizing the toner and rotating the rotor of the screw pump in the communication path in this state, it is possible to stabilize the supply of toner to the image forming unit. As a result, the degree of freedom in the layout of the image forming unit and the toner container can be improved without limiting the toner supply direction from above to below.
[0141]
  Claim3According to the described invention, the claims1 or 2In the image forming apparatus described above, the air from which the caustic substance has been removed by the air conditioner is directly fed into the toner container by the air pump, thereby air-conditioning the toner container more quickly and air-conditioning the toner case. Compared to indirectly air-conditioning, the target air-conditioning space is reduced to improve air-conditioning efficiency, reduce the size of the air-conditioning equipment, reduce noise generated during operation of the air-conditioning equipment, and operate the air-conditioning equipment. It is possible to further effectively reduce the power consumption associated with.
[0142]
  Claim4According to the described invention, claims 1 and 2 are provided.Or 3In the image forming apparatus described above, air can enter and exit between the toner case and the toner container without causing powder such as toner to scatter from the toner container, and the inside of the toner container can be air-conditioned more quickly.
[0143]
  Claim5According to the described invention, the claims4In the image forming apparatus described above, the air exhausted from the toner container is directly introduced into the air conditioner by the exhaust introduction unit, so that the air quantity that the air conditioner targets for air conditioning is further limited and the air conditioner requires Since the control capability can be further reduced, in addition to the effect of the invention of claim 6, the air conditioner can be downsized, the noise generated during the operation of the air conditioner can be reduced, and the power consumption associated with the operation of the air conditioner can be reduced. Can be achieved more effectively.
[0144]
  Claim6According to the described invention, the claims5In the image forming apparatus described above, the air conditioner and the toner container are communicated when the opening / closing member is positioned at the closed position, and the air conditioner and the toner container are separated when the opening / closing member is positioned at the open position. Thus, it is possible to improve the operability when replacing the toner container.
[0145]
  Claim7According to the invention described in claims 1, 2, 3, 4, 5Or 6The image forming apparatus described above may also include a case where a plurality of toner cases and image forming modules are provided, such as a color image forming apparatus that forms a color image by superimposing toner images of each color formed. 3, 4, 5Or 6The effects of the described invention can be obtained.
[0146]
  Claim8According to the copying machine of the invention described in claims 1 to7A copying machine having the effect of the invention described in any one of the above can be obtained.
[Brief description of the drawings]
FIG. 1 is a longitudinal front view showing a schematic structure of an image forming apparatus according to a first embodiment of the present invention.
FIG. 2 is a perspective view showing an image forming module.
FIG. 3 is a schematic view showing the structure of air conditioning means.
FIG. 4 is a schematic view showing the structure of another air conditioning means.
FIG. 5 is a schematic diagram showing a connection structure between an image forming unit and air conditioning means.
FIG. 6 is a schematic diagram showing another connection structure between the image forming unit and the air conditioning unit.
FIG. 7 is a schematic view showing another connection structure between the image forming unit and the air conditioning means.
FIG. 8 is a longitudinal sectional front view showing a schematic structure of an image forming apparatus according to a second embodiment of the present invention.
FIG. 9 is a longitudinal sectional front view showing a schematic structure of an image forming apparatus according to a third embodiment of the present invention.
FIG. 10 is a schematic diagram illustrating a structure of a toner supply unit.
FIG. 11 is a longitudinal front view showing a schematic structure of an image forming apparatus according to a fourth embodiment of the present invention.
FIG. 12 is a longitudinal front view showing a schematic structure of an image forming apparatus according to a fifth embodiment of the present invention.
FIG. 13 is a schematic diagram illustrating a structure of a toner supply unit of an image forming apparatus according to a sixth embodiment of the present invention.
FIG. 14 is a longitudinal front view showing a schematic structure of an image forming apparatus according to a seventh embodiment of the invention.
FIG. 15 is a longitudinal front view showing a schematic structure of an image forming apparatus according to an eighth embodiment of the present invention.
FIG. 16 is a longitudinal front view showing a schematic structure of a copying machine according to a ninth embodiment of the present invention.
[Explanation of symbols]
11 Toner case air conditioning means, imaging case air conditioning means, air conditioning device
11 'Toner case air conditioning means, image forming case air conditioning means, air conditioner
12 Specific imaging units
12, 14, 15 Image forming unit
40 Toner Case
41 Toner container
42 Filter
43 Communication route
60 Air pump
63 Screw pump
80 Exhaust introduction means
91 Opening / closing member
110 Transfer object
150 copier
A, B, C, D, F, G, H Image forming apparatus

Claims (8)

And image bearing member, and image forming unit of an electrophotographic system for imaging a toner image on said image bearing member, a toner case formed around the toner container through the inter-tight closed space for holding a developer containing a toner, Toner supply means for supplying toner held in the toner container to the specific image forming unit, and toner case air conditioning means for removing a factor that is harmful to image formation by the image forming unit flowing into the toner case and, the equipped,
An image forming case that houses the image carrier and the image forming unit and forms a sealed space around the image carrier excluding the transfer position of the toner image to the transfer target, and flows into the image forming case An imaging case air-conditioning means for removing the causative substance,
The toner case air-conditioning means and the image-forming case air-conditioning means are a single air-conditioning device that communicates with the air-intake side of the toner case and the air-intake side of the image-forming case, respectively, and sends out air that has removed the causative substance ,
An image forming apparatus in which an exhaust side of the toner case and an exhaust side of the image forming case are communicated with an intake side of the single air conditioner . The toner supply means is provided in the toner case and provided in the communication path, an air pump that feeds air into the toner container, a communication path that connects the toner container and the specific image forming unit, and the communication path. The image forming apparatus according to claim 1, further comprising a screw pump including a rotor having a spiral blade member around an axis . Before SL air pump, the single image forming apparatus directly the feeding to the toner container according to claim 1 or 2, wherein the air to remove the cause substance by the air conditioner. The image forming apparatus according to claim 1, wherein comprises a filter having a pore to allow the passage of smaller air than the particle diameter of the developer held in the toner container is provided wherein the toner container. The image forming apparatus according to claim 4 , further comprising an exhaust introduction unit that introduces air exhausted from the toner container into the single air conditioner through the filter. A closed position for forming the inter-tight closed space in the toner case, a closing member which is disposed displaceably between an open position for opening the toner case to the extent to allow the attachment and detachment of the toner container with respect to the toner case Equipped,
The exhaust gas introduction means has one end in communication with the said single air conditioner, and the other end provided in the closing member, the closing member and the single air conditioner when being positioned in the closed position The image forming apparatus according to claim 5 , wherein the single air conditioner and the toner container are separated when the toner container is in communication and the opening / closing member is positioned at an open position. A plurality of toner cases are provided for each color of toner held in the toner container, and a plurality of image forming cases are provided for each toner case. Or the image forming apparatus according to 6 ; Reading means for reading an image of an original, using the image forming apparatus according to any one of claims 1 to 7, comprising a image forming means for forming an image in which the reading means has read the recording medium copying Machine.

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