JP3477463B2 - Image forming apparatus provided with ozone processing means - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image forming apparatus such as a copying machine, a laser or an LED printer, or a laser or an LED facsimile, which has corona discharge means as a constituent element, and more specifically, to an image forming apparatus therefor. The present invention relates to the image forming apparatus having a processing unit for treating generated ozone.

[0002]

2. Description of the Related Art In various image forming apparatuses having corona discharge means as a constituent element, ozone generated during the operation of the corona discharge means is unnecessary, so that ozone is conventionally removed or Many proposals have been made for ozone treatment means for decomposing.

As a method of treating ozone, they use light,
Heat or a catalyst is applied to ozone to decompose or deodorize it, or to prevent ozone from being released to the outside of the image forming apparatus. Furthermore, as a means for efficiently performing these processes, the ozone source Means are used to transport and collect ozone in between.

Among the conventional ozone removing techniques, there are the following techniques for using light.

FIG. 36 is a diagram for explaining the configuration and operation of the device disclosed in Japanese Patent Laid-Open No. 3-62054 as an example of the conventional technique. FIG. FIG. 36 (B) is a side view of the device.

In FIG. 36, the air containing ozone generated by the charger 501 is discharged to the duct 5 by the exhaust fan 506.
It is sucked through 04 through the ozone filter 505. On the other hand, a duct 504a is provided branching from the duct 504 to the side of the photoconductor 502 and having an open portion near the photoconductor, and a discharge lamp 503 is arranged in the middle of the branched duct.

The light from the static elimination lamp 503 irradiates the surface of the photoconductor surface 502 to remove charges, and at the same time, a duct 504 through which air 507 containing ozone partially flows.
To illuminate the inside. Then, the irradiated light decomposes ozone.

However, according to this method, when the exhaust fan 506 shown in FIG. 36 (A) operates, the air 512 around the photoconductor 2 is drawn from the opening provided on the photoconductor 2 side of the duct surrounding the static elimination lamp 503. (See FIG. 36B), the suction force for sucking the ozone generated by the charger 501 to generate the ozone flow 507 is insufficient, and the charger 50
Ozone around 1 is not sufficiently sucked and ozone cannot be sent to the ozone filter 505.

On the other hand, if the exhaust output of the exhaust fan 506 is increased in order to make up for the lack of ozone suction force, the exhaust fan 506 becomes larger and the exhaust fan noise becomes noticeable. Become.

The degree of ozone decomposition or adsorption of the ozone filter depends on the contact time of the ozone-containing air passing through the ozone filter with the portion of the ozone filter which decomposes or adsorbs. That is, since it depends on the air flow velocity, if the exhaust output of the exhaust fan 506 is increased,
The flow velocity of the air passing through the ozone filter 505 increases, and the degree of ozone decomposition decreases.

Further, since the light source 503 is arranged in the duct 504, the structure of the duct 504 becomes complicated and becomes large, which may result in restriction of the arrangement of the duct. .

Further, as shown in FIG. 37, in a device similar to the above-mentioned conventional example, in order to increase the space exposed to the light inside the duct 504 and to improve the decomposition rate of ozone by the light, the branched duct is used. It is conceivable to make a change such that the frontage is made large, but the ozone suction force becomes further insufficient as compared with the above-mentioned conventional example.

Further, in the same apparatus as the above-mentioned conventional example, if ozone is decomposed or adsorbed uniformly in the entire ozone filter, partial deterioration of the ozone filter is reduced and the life of the entire ozone filter is extended. Because you can
As shown in FIG. 38, it is conceivable that air having a uniform ozone concentration is flown to the ozone filter 505 by agitating the air by the exhaust fan 506 on the upstream side of the ozone filter 505.

In the case of such a structure, since the branch duct is arranged between the ozone filter 505 and the ozone suction portion of the duct 504, the exhaust fan 506 is arranged on the upstream side of the branch portion 504a of the duct. In this case, the ozone filter 505 acts as a resistance of the flow path, and a part 513 of ozone sucked from the opening of the branched duct leaks into the copying machine and deteriorates the photoconductor 2 and other parts in the copying machine 1. The problem arises. For this reason, the place where the light is introduced inside the duct is limited, the degree of freedom in design is reduced, and if the parts are densely arranged around the photoconductor, the design is hindered.

Therefore, if such a system is adopted, the fan becomes large and the duct shape becomes complicated.
Also, processing such as increasing the rotation speed of the fan and limiting the place where light is introduced is required, but the size of the device is reduced, the ease of assembly is reduced, the rotation noise of the fan becomes noticeable, and the degree of freedom in design is increased. An unfavorable problem such as a decrease will occur.

Further, among the conventional ozone removing techniques using light, there are the following techniques for using the light of the fluorescent lamp exposure lamp.

In the description of JP-A-3-62054, which can be shown as a conventional example, it is shown that ozone is decomposed by irradiating the inside of the duct with white light emitted from a fluorescent lamp which is a light source for exposure. Has been done.

However, since this light source is originally for exposure, it utilizes white light, and the white light emitted from the fluorescent lamp of the exposure light source is the fluorescent substance applied to the inner tube wall of the fluorescent lamp. Generated by shining UV light on
Only about 20% of the input is white light, and the ozone decomposition rate is higher than ultraviolet light compared to white light, so it is said that the performance of a fluorescent lamp is sufficiently drawn out for the two purposes of exposure light source and ozone decomposition. I can't say.

Among the conventional ozone removal techniques, there are the following techniques for using heat.

Japanese Unexamined Patent Publication No. 3-94279, which can be cited as a conventional example, discloses a technique in which a heater is provided in the duct to raise the temperature of the air in the duct by the heat of the heater, and air is transferred by heat conduction to the outside of the duct. In order to prevent the temperature from decreasing and the ozone decomposing efficiency to decrease, a technique of extending the life of the ozone filter or eliminating the need for the ozone filter is disclosed by covering the periphery of the duct with a heat insulating material.

However, in this disclosure, the heater as the heating means is provided around or inside the duct, and the temperature control means of the heater is required to prevent the parts around the heater such as the duct means from being heated. Is.

In the case where the duct is simply irradiated with light, ozone is decomposed only in the space where the light is irradiated.

Further, the present invention relates to a technique for improving the use efficiency of the ozone filter shown in the above-mentioned conventional example, in which air containing ozone has a uniform air flow velocity distribution in the cross section of the flow path before passing through the ozone filter. A technology for realizing the above is disclosed. This is because the ozone decomposition or adsorption performance of the ozone filter depends on the time during which the ozone-containing air passing through the ozone filter comes into contact with the portion of the ozone filter that decomposes or adsorbs. When the air flow rate is constant, it depends on the air flow rate.Therefore, the part of the ozone filter with a slow air flow has a high adsorption or decomposition rate, but the deterioration rate is fast, and the part of the ozone filter with a high air flow rate has a low adsorption or decomposition rate. This is because the deterioration rate is slow and it is necessary to average the flow velocity for efficient use of the entire ozone filter.

In one example thereof, a wind shield for blocking air is provided in the high flow velocity region on the upstream side of the ozone filter flow path, and the air in the high flow velocity region is once collected in the low flow velocity region so that the fan has a high suction force. In the high flow velocity area generated by, the air flow gathered in the low flow velocity area is sucked again by the suction force of the fan,
An inertia of air movement is added to a slow flow velocity region generated by a region where the suction force of the fan is low to make the flow velocity distribution of the air in the flow passage section immediately before the ozone filter uniform (Japanese Patent Laid-Open No. 62-296166). Gazette).

However, in this example, when the wind shield is brought close to the ozone filter, the flow is concentrated in a region of the ozone filter that does not face the wind shield, the effective flow passage cross section is narrowed, and the flow velocity is increased. Since the ozone removal rate is reduced and the ozone filter is partially used, it is necessary to keep a constant distance between the ozone filter and the wind shield. Then, since a vortex is generated behind the wind shield in the flow direction, there is a problem that the flow velocity is unstable with respect to the passage of time and the cross section of the flow path.

The second example is to provide a mesh filter having a uniform thickness on the upstream side of the ozone filter. When passing through the mesh filter, the air that collided with the mesh portion of the filter inside the mesh filter is used. In the flow, the flow direction is dissipated, and the flow velocity distribution in the direction perpendicular to the flow path cross section becomes uniform.

However, in this example, since the phenomenon in which the air collides with the mesh-like portion and the flow direction is dissipated, the effect of uniformizing the flow velocity distribution in the mesh-like filter portion is not so high, and the mesh-like portion is not so effective. The problem arises that a considerable distance needs to be provided between the filter and the ozone filter.

In the third example, a plurality of flow rectifying plates or stitch nets are provided on the upstream side of the flow path of the ozone filter to disperse the air flow in the high flow velocity area and distribute it to the low flow velocity area. This is to prevent the ozone filter from partially deteriorating and shortening the entire life by homogenizing the flow velocity or flow rate immediately before the filter (JP-A-4-242277).

However, in this example, there is a problem that a considerable distance is required between the stitch net and the ozone filter in order to dissipate the air flow in the high speed region and distribute it to the low flow velocity region. Occurs.

Further, in order to prevent harmful substances such as ozone from being discharged to the outside of the main body of the device, a technique is provided in which a filter and a fan are provided inside the device so that air is circulated inside the device without being discharged to the outside of the device. Kaihei 3-137656). In addition, here, the duct for exhaust heat is provided separately.

However, in this example, since a duct is provided on the back surface of the charging device to suck the ozone generated by the charging device, the air around the photoconductor outside the charging device is sucked. As a result, the scattered toner contained in the air near the photoconductor passes through the charging device, and the stability of discharge is reduced in a short period of time.

[0032]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the prior art. In an image forming apparatus equipped with a means for treating ozone generated from a corona discharge means, a duct means is used. The ozone to be processed is efficiently collected, and the ozone in the duct is efficiently photolyzed (thermally decomposed), and the ozone processing means is large in size, complicated, has a low assembling property, and is noisy. It is an object of the present invention to prevent a decrease in the degree of freedom in designing the image forming apparatus including the ozone processing unit as a whole.

As an ozone treatment method, in the image forming apparatus using an ozone filter, the purpose of facilitating replacement of the ozone filter and suppressing partial deterioration of the ozone filter to improve filtering performance are as follows.
Provision of new means for adjusting the flow velocity of air containing ozone, which is collected and processed by the ozone filter through the duct means, at the input side of the ozone filter, and downsizing and simplification of the device configuration of the ozone processing means. The task is to achieve it.

Further, as an ozone processing method, in the image forming apparatus using an ozone filter, there is a conventional problem in a so-called closed loop duct type ozone processing means in which the air containing ozone to be processed is not discharged to the outside of the image forming apparatus. It is an object of the present invention to provide the device which does not cause discharge instability due to the scattered toner.

[0035]

According to the present invention, there is provided a corona discharger, duct means for passing air containing the ozone to collect ozone generated in the corona discharger, and outside the duct means. In an image forming apparatus having a light source provided, a light reflecting member is attached to the inner wall of the duct means, and a light absorber is provided on the inner wall of the external duct means on the upstream side of the position where the light reflecting member is attached. And the light source is provided outside the duct means at a position facing the light reflecting member.

According to a second aspect of the present invention, in the first aspect of the invention, a heat absorber that emits heat by absorbing infrared light contained in the light guided into the duct means is provided inside the duct means. In addition to the function of claim 1, the heat absorber provided in the duct converts the infrared light component of the light guided from the transmission part into the duct into heat, and the ozone in the duct together with the light. It is also decomposed by heat so that the decomposition rate of ozone is improved.

[0037]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. Needless to say, the present invention should not be limited to these embodiments.

FIG. 1 is a sectional view showing an outline of a copying machine according to an embodiment of an image forming apparatus of the present invention.

An optical system 2 is arranged in the upper part of the main body 1 of the copying machine. The optical system 2 includes a copy lamp 3 composed of a halogen lamp or a fluorescent lamp and a plurality of mirrors 4 to 4.
7 and a zoom lens 8.

A photoconductor 21 is rotatably supported below the optical system 2. As is well known, a charger 22, a developing unit 23, a transfer unit 24, a charge eliminator 25 and the like are arranged around the photoconductor 21.

The operation for copying in this portion is as follows.
The mirror base is moved in the direction A while the surface of the photoconductor 21 is charged to a predetermined potential by the charger 22, and the original document (not shown) covered by the original document cover 26 is sequentially irradiated from the front end by the copy lamp 3. .

Then, the reflected light from the original document is exposed to the photoconductor 21 via the optical system 2, whereby an electrostatic latent image is formed on the photoconductor 21.

Further, while the original document is being conveyed by the drums 29a, 29b, etc. in the original document conveying path 28 in the automatic original document feeder 27 arranged above the copying machine main body 1, it is provided at two positions of the original document conveying path 28. Documents are sequentially irradiated from the leading edge by the copy lamp 3 through the slits,
In the same manner as described above, the photoconductor 21 is exposed to the reflected light from the document.

When an electrostatic latent image is formed on the photoconductor 21, the electrostatic latent image is subsequently developed with toner supplied from the developing section 23 to form a toner image.

After that, a sheet (not shown) is sent to the registration roller 31 from the sheet feeding section 30 including a plurality of sheet feeding cassettes, and the sheet is temporarily stopped by the registration roller 31 as required, and then at a predetermined timing. Is supplied to the photoconductor 21.

Then, the toner image is transferred by the transfer device 24 onto the supplied paper. After that, the paper is peeled off from the photoconductor 21, conveyed to the fixing unit 33 by the conveyance device 32, and after the toner image is fixed here, if it is a one-sided copy, it is ejected to the ejection tray 34 as it is.

On the other hand, in the case of synthetic copying or double-sided copying, the sheet discharged from the fixing section 33 is sent to the sheet conveying path 35, and in the case of synthetic copying, it is directly discharged to the intermediate tray 36, while double-sided copying is performed. In this case, the front and back are reversed by the reversing unit 37, and then the paper is discharged to the intermediate tray 36.

When a predetermined number of sheets are accumulated in the intermediate tray 36, the sheets on the intermediate tray 36 are sequentially fed from the uppermost one by the sheet feeding roller 38 and sent to the photoconductor 21, and copying is continuously performed. Be seen.

FIG. 2 is a schematic circuit block diagram of the copying machine according to the embodiment of the present invention.

First, the CPU consists of a master CPU 40 and a slave CPU 41.
Controls the operation circuit 44. A display section circuit 45 and an operation section circuit 59 are connected to the operation circuit 44, and display of the screen and control of operation key input are performed.

The master CPU 40 controls other than the operation section of the main body. For example, the heater lamp lighting circuit 4
6, copy lamp lighting circuit 47, process control circuit 4
8, the motor drive circuit 49, etc. are connected.

By the way, a charger 22 for charging the photoconductor disposed in the copying machine 1 shown in FIG. 1, a transfer device 24 for transferring the toner image on the photoconductor to a sheet, or a device such as a peeling charger, Alternatively, although not shown, a charger, a transfer device, a peeling device, or the like used in a device that temporarily supports a toner image from a photoconductor such as a transfer belt used in a color copying machine and then transfers the toner image to a sheet is used. , A corona discharge part having a corona discharge wire shape, sawtooth shape, roller shape, or the like.

Since such an apparatus uses corona discharge to generate ozone inside the machine during operation, this ozone reacts with parts inside the copying machine due to its unstable structure in the natural world. And degrades its performance. For example, there is a problem in the device that the characteristics of the photoconductor change when the photoconductor is invaded by ozone and the image becomes unclear, and a problem that it is harmful to the human body if exhausted as it is.

For this reason, ozone generated in the copying machine is sucked into the exhaust duct together with air, and ozone is decomposed or adsorbed by an ozone processing device such as an ozone filter.
The ozone concentration in the air is reduced to a level that does not cause a problem, and then exhausted outside the aircraft.

As shown in FIG. 3, the duct means 101 for sucking ozone has one end having a suction opening 101a (see FIG. 3B) arranged near the charging device 22 and the transfer device 24. A flow path is formed from the portion toward the other end where an exhaust opening 101b for exhausting air is provided outside the copying machine main body 1.

An ozone filter 102 is provided near the exhaust opening 101b so that ozone flowing through the duct means 101 can pass therethrough.
Exhaust fan 10 that sucks air containing ozone from the suction opening 101a to the upstream side of the exhaust gas and flows it to the ozone filter side
0 is provided.

Further, as shown in detail in FIG. 4, a transparent member 101d as a transparent member is provided inside the duct means at a portion 101c where a part of the wall surface of the duct means 101 is cut out, further upstream of the exhaust fan 100. It is attached so as to isolate the outside. Therefore, the duct means 101 is hermetically sealed to prevent the suction pressure of the suction opening 101a of the duct means 101 from decreasing when the exhaust fan 100 operates.

With this transparent member 101d, the duct means 1
A light source 103 is provided outside the duct means 101 facing the light transmitting portion 101e formed on the wall surface 01 of the light source 01, and the light emitted from the light source 103 is directly or directly reflected by the light reflecting member 3
Reflected by the cover 300 having 01, the duct means 1
The light is emitted to the inside of the duct means through the light transmission part 101e of No. 01.

Ozone generated from the charging device 22 and the transfer device 24, which are corona dischargers provided in the copying machine, is acted by the exhaust fan 100, and the ozone suction duct means 1 is used.
01 is sucked together with air from one end, but the duct means 1
The light transmission part 1 provided on a part of the wall surface in the middle of the channel 01
It is affected by the light incident through 01e.

Ozone, which is acted upon by light, has a property of being extremely easily photodecomposed, and during the formation of an image, it receives a light from the transparent portion 101d to cause a photochemical reaction while flowing through the duct, and O ₃ + hν → O ₂ + O (hν: energy of light), O + O ₃ → 2O ₂ , and is decomposed into oxygen that is harmless to the copying machine and the human body. Here, it is known that the wavelength of light absorbed by ozone is 305 nm or less and 405 to 1100 nm.

Ozone not decomposed by light is sent to the ozone filter 102, adsorbed or decomposed, and the ozone concentration in the air exhausted to the outside of the copying machine main body 1 decreases.

The light source 103 is at least turned on or blinks while the corona dischargers 22 and 24 are operating for the image forming operation of the copying machine, and the light transmitting portion provided on the wall of the duct means 101. Duct means 101 through 101e
Lighting control is performed by the master CPU so as to illuminate the inside of the.

The light transmitting portion 101e may be formed by attaching a hard member such as glass or a flexible member such as a transparent sheet to the cutout portion 101c of the duct means 101, or the duct means 101. May be formed by molding a transparent resin.

Further, as shown in FIG. 5, an opening 101f having a rib 101g is provided on the wall surface of the duct means 101,
The transparent member 101d may be held in the opening 101f, and the light source holder 302 having the light source 103 may be adhered to the opening 101f to irradiate the interior of the duct means 101 with light while maintaining the airtightness of the duct means 101. . In this case, as shown in FIG. 6, if a seal member 303 such as a rubber material or a non-continuous foam sponge material is provided in the portion of the light source holder 302 that is in close contact with the duct means 101, the airtightness is further enhanced.

Here, from the viewpoint of efficiently using light for decomposing ozone, as shown in FIG.
There is a method of covering the surroundings with a cover 300 provided with a reflection member 301 on the inner surface to prevent light from leaking to the outside, but referring to the relationship between the material of the light transmitting portion 101e and the wavelength of light, the light of a certain material Since the transmission rate of depends on the wavelength of light,
Basically, if both are selected so that the wavelength range where the emission intensity of the light source 103 is large and the wave delay range where the light transmittance of the material of the light transmitting portion 101e is large overlap, most of the light energy is transmitted and the light is transmitted. It can be efficiently used for ozone decomposition.

An example thereof is shown in FIG. As shown in FIG. 7 (A),
Light emitted from the light source 103 has a narrow emission wavelength region 310a, such as laser light or LED light, and is close to monochromatic light, or FIG.
As described above, there are some lamps having a wide emission wavelength range 310b such as a halogen lamp and a fuse bulb. In any case, however, as shown in FIG.
a, 311b, 311c are the emission wavelength range 310a of the light source,
It may be overlapped with 310b.

By the way, it is known that the decomposition of ozone is a photochemical reaction which varies depending on the wavelength of light, and the reaction limit wavelength is shown in Table 1. The decomposition efficiency is higher in the shorter wavelength region. Since a general light source has a considerably wide emission wavelength range, the photochemical reactions in Table 1 proceed in parallel.

[0068]

[Table 1]

Therefore, it is not enough in terms of efficiency to simply make the light transmittance of the light transmitting portion overlap with the portion of the light emitting wavelength range of the light source having a large light emission intensity, and as shown in FIG. If the light transmittance 311 of the light transmitting portion is overlapped with the ozone resolution curve 312 in which the light intensity distribution 310 of the light source is considered for the ozone decomposition rate for each wavelength, the light can be used more efficiently.

FIG. 9 is a view showing an example of the duct means. A light reflecting member 104 such as a mirror, a metal film vapor deposition member or an aluminum sheet is provided on the inner wall surface of the duct through which light is guided through the transparent member 101d of the duct means 101. It is provided so that the light guided into the duct is multiply reflected inside.

With this structure, even when the area of the transparent portion is small, the light travels inside the duct, so that the area where the light exists (=
The ozone decomposition area) becomes larger.

According to the example shown in FIG. 9, the light reflecting member 104 is
When there is no light, the area where light exists is only in the range of the A part, but by providing the light reflecting member 104, the light spreads like the B part.

An ozone filter 102 is provided at the end of the duct means 101 shown in FIG. 10, and a transparent member 101d is attached to the opening 101f of the duct wall on the upstream side thereof.
The direct light from the light source 103 and the reflected light from the cover 320 of the reflecting member arranged on the back side of the light source are used for the duct means 101.
To irradiate inside.

Further, an exhaust fan 100 is provided on the upstream side, and ozone is sucked from the end of a duct (not shown) and transferred to the ozone filter side. In this case, since the light introducing portion of the duct means 101 is sealed by the transparent member 101d, the ozone filter 102 becomes a flow path resistance,
Due to the pressure generated between the ozone filter 102 and the exhaust fan 100, a part of the ozone-containing air blown from the exhaust fan 100 through the opening 101f of the duct means does not leak to the outside of the duct means 101.

Then, a light reflecting member 104 is attached to the inner wall of the duct means 101 between the ozone filter 102 and the exhaust fan 100 to reflect the light irradiated inside the duct means 101 inside the duct means 101, Duct means 10 between the ozone filter 102 and the exhaust fan 100
Light is made to exist in the space inside 1 and ozone is decomposed in this space.

Further, a light absorbing member 105 is attached to the inner wall on the upstream side of the exhaust fan, and the ozone filter 102
Has a black color that absorbs light, and when light reaches the corona discharger side and irradiates the photoconductor (see FIGS. 1 and 21), uneven charging of the photoconductor occurs, which affects the image forming operation. It is configured so that it does not go out or leak light to the outside of the device. The light absorbing member 105 may be provided near the corona discharger of the duct means 101, or the duct means 101 may be formed of a black resin material.

As described above, in this embodiment, since the transparent portion 101d is provided on the wall of the duct means 101, the inside of the duct is irradiated with light through the transparent portion 101d, and the airtightness of the duct is maintained. Since the suction pressure of the fan does not decrease, the fan 100 is prevented from increasing in size, the duct shape is simplified to improve the assemblability, and the fan noise is reduced.
It is possible to prevent a reduction in design freedom.

In the duct means shown in FIG. 11, a heat absorber 106 that absorbs and dissipates infrared light components is provided in 101h inside the duct where light is guided through the transparent member 101d of the duct means 101. Raise the temperature and perform photolysis and thermal decomposition of ozone together. Here, ozone is known to be faster rapidly autolysis the ambient temperature rises, as in the case of photolytic O ₂
It is decomposed into harmless.

When the temperature of the ozone flow introduced into the duct is T ₁ (° C.) and the temperature of the ozone flow after passing through the heat absorber 105 is T ₂ (° C.), T ₂ > T ₁ Become.

The heat absorber 105 is best made of a material for those uses, but a metal or resin member coated with a paint that absorbs infrared wavelengths such as black coating may be used.

FIG. 12 is a graph showing the relationship between the ambient temperature and the decomposition rate of ozone. As shown in this figure, it is found that the decomposition of ozone is remarkably accelerated when the ambient temperature rises, and the ozone decomposition performance is improved by the combined use with photolysis.

As shown in FIG. 13, the transparent member 101d of the duct means 101 is composed of a convex lens to increase the amount of incident light guided from the light source into the duct and to increase the intensity.

In FIG. 14, in the copying machine described in FIG. 1, in the structure in which the copy lamp 3 remains at the fixed position, the document is relatively moved and the document images are sequentially irradiated.
A fluorescent lamp is used as the copy lamp 3.

In this fluorescent lamp, a fluorescent substance is applied to the inner tube wall of the fluorescent lamp, and the white light emitting region 3a, which emits white light when exposed to ultraviolet rays generated between the electrodes, and the ultraviolet ray without applying the inner tube wall. Is divided into an ultraviolet radiation region 3b which is directly irradiated.

Then, the duct 10 for collecting the ozone in the machine and exhausting the ultraviolet rays radiated from the ultraviolet ray radiation region 3b.
The ozone in the duct 101 is decomposed by ultraviolet rays from the transparent member 101d in FIG.

Here, the photodecomposition of ozone is carried out in the wavelength region corresponding to visible light as described above. However, while decomposition with visible light (340 nm or more) does not have the property of decomposition in a chain reaction, decomposition with ultraviolet light causes the chain reaction, which is more than 3 times as efficient as decomposition with visible light. It is known to be decomposed. In addition to this, it is known that the number of chains is further increased in the presence of water vapor, and the decomposition efficiency is about 60 times higher than that of visible light (especially long-wavelength light).

FIG. 15 shows a liquid crystal shutter type printer using a white light source.

Light from the white light emitting area 3a of the image signal light source 3 illuminates the photoconductor 21 via the liquid crystal shutter 120.

The light from the ultraviolet radiation region 3b of the light source 3 passes through the transparent member 101d of the duct 101 and enters the duct 101. The operation according to this embodiment is
As in the case of FIG. 14, ozone generated from corona dischargers 22 and 24 not shown in the figure and flowing in the duct means 101 is irradiated with ultraviolet rays through the transparent member 101d to decompose ozone.

Further, in this case, the back light from the liquid crystal shutter 120 is included as the light of the fluorescent lamp that contributes to the image formation, which acts to enhance the decomposition rate of ozone.

In the copying machine shown in FIG.
As shown in (A), the fluorescent lamp 3
The length of (3a, 3b) is made longer than the image forming area.
In the case of the copy lamp 3 shown here, it is possible to irradiate the outside document area 108 outside the irradiated document width area 107.

In one copy lamp 3 (fluorescent lamp), the white light emitting area 3a is made to correspond to the original irradiation area 107, and the area outside the original 108 is taken along the line CC 'in FIG. 16 (A). As shown in FIG. 16B, the ultraviolet radiation regions 3b are arranged in a corresponding positional relationship.

The operation of the ozone photodecomposing means of this embodiment will be described.

The copy lamp 3 operates under the control of the master CPU 40 when the copy operation is started by the operation of the operation unit 59.

At this time, the white light emitting area 3a of the copy lamp 3 illuminates the original with white light, and at the same time, in the ultraviolet emitting area 3b, ozone generated during image formation flows in the duct 101. Ultraviolet rays are applied to a part of the area to photolyze ozone in the duct 101.

FIG. 16A shows a view of the copying machine 1 as seen from above, and the duct 10 is provided below the fluorescent lamp 3.
1 is located.

During the copying operation, ultraviolet rays are radiated downward from the ultraviolet radiation region 3b to photolyze ozone through the transparent member 101d located on the upper surface of the duct 101.

In the copying machine shown in FIG. 17, as shown in FIG.
As can be seen from the part shown in (A), the fluorescent lamp 3 (3
The length of a, 3b) is made longer than the image forming area. In the case of the copy lamp 3, it is possible to irradiate the outside document area 108 outside the irradiated document width area 107.

In one copy lamp 3 (fluorescent lamp), the white light emitting area 3a is made to correspond to the original width area 107, and the area outside the original 108 is indicated by C in FIG. 17 (A).
As shown in FIG. 16B showing the -C 'cross section, the ultraviolet radiation regions 3b are arranged in a corresponding positional relationship.

The operation of the ozone photolysis means of this embodiment will be described.

Here, the copy lamp 3 has an operating section 59.
When the copying operation is started by the operation from
Under the control of the PU 40, it moves in the scanning direction (arrow) shown in FIG.

At this time, the white light emitting area 3a of the copy lamp 3 illuminates the original with white light, and at the same time, in the ultraviolet emitting area 3b, ozone generated during image formation flows in the duct 101. Ultraviolet rays are applied to a part of the area to photolyze ozone in the duct 101.

FIG. 17A shows a view of the copying machine 1 as seen from above, and shows the ultraviolet radiation region 3 of the fluorescent lamp 3.
The duct 101 is located in the lower part of b.

Particularly during the copying operation, the ultraviolet radiation area 3b is in a position parallel to the locus of movement, and when ultraviolet rays are irradiated downward during movement, the duct is constantly passed through the transparent member 101d located on the upper surface of the duct 101. The positional relationship is such that ultraviolet rays are radiated inside.

FIG. 18 is a plan view of the optical system 2 of the copying machine 1. In the lamp unit 330, the exposure lamp 3 made of a fluorescent lamp and the mirror 4 are integrally provided, and the mirror unit 331 is a mirror. 5 and 6 are integrally provided, and are moved on the unit support base 332 by the drive wire 333 and the pulley 334 so that the respective speeds become 2: 1.

FIG. 19 is a diagram showing a main part of the copying machine shown in FIG.

As shown in FIG. 18, in the original width region 107 in FIG. 19, the inner surface of the tube wall of the fluorescent lamp 3 is a region 3a coated with a fluorescent substance over the entire circumference, and the light for exposure is exposed. Irradiation is possible.

In the outer area 108 of the original, an inner surface of the tube wall opposite to the duct 101 is provided with an area 3b which is not coated with a fluorescent substance, and ultraviolet rays generated inside the tube of the fluorescent lamp pass through the transparent member 101d. Irradiation is possible inside the duct 101. In this case, it is more preferable to surround the ultraviolet radiation region 3b with a cover so that the ultraviolet rays do not leak to a place other than the duct.

The operation of this embodiment is similar to that of the embodiment relating to FIG. 17 described above.

20 and 21 are views for explaining the configuration and the operating state of another form of each duct means.

In the ozone processing apparatus for processing and exhausting ozone generated in the machine by the exhaust fan 100, the duct means 101, and the ozone filter 102 from the side surface or the rear surface of the copying machine 1 described in FIG. An exterior duct portion 130a that covers the periphery and is integrally formed with the detachable exterior 130 and is connected to the duct means 101 to form an exhaust path is provided.

When the exterior 130 is removed from the copying machine 1,
The ozone filter 102 is provided at a position exposed to the outermost part of the device body or the exterior 130.

In the example of FIG. 20, the ozone filter 102 is arranged in the exterior duct portion 130a, and when the exterior 130 is removed from the copying machine 1, the ozone filter 102 is removed.
Since it is exposed on the back surface side of, the filter can be easily taken out.

Similarly, in the example of FIG. 21, the ozone filter 102 is provided at the connecting portion between the exterior duct portion 130a and the duct means 101, and when the exterior 130 is removed, the ozone filter 102 is exposed at the end portion of the duct means 101. To do.

FIG. 22 is a view for explaining the structure of the form of the duct means and its operation.

In the ozone processing apparatus of the copying machine described with reference to FIG. 3, the ozone exhaust fan 100 and the ozone filter 102 are provided in the duct means 101 on the downstream side of the fan.

In this case, with this configuration alone, the wind speed distribution passing through the ozone filter 102 is affected by the wind speed distribution discharged by the exhaust fan 100, and the wind speed distribution greatly differs in the flow passage cross section.

Also in this embodiment, the structure is basically the same as that of FIG. 3 (the relevant part is shown in FIG. 22A).
Then, taking an example of a mode in which an axial-flow type fan is used as the exhaust fan 100, the wind velocity of ozone blown out from the exhaust fan 100 hardly flows in the central portion as shown in FIG. (S portion), the wind speed of the blade portion is fast when viewed from the front (F portion), and the distribution is a donut shape.

In this case, since the flow of ozone is small in the central portion of the filter, it cannot be said that the total ozone adsorbing surface or the total ozone decomposing surface of the ozone filter is effectively used, and the wind speed at the donut portion becomes high, and the ozone filter becomes high. Removal efficiency also decreases.

Therefore, as shown in FIG. 22C, the resistance applying means 140 has a large resistance L part in the doughnut-shaped region F where the wind speed is fast and a small resistance M part in the region S part in the center where the wind speed is slow. Is provided on the upstream side of the ozone filter as shown in FIG. In FIG. 22A, the exhaust fan 100 is provided on the upstream side of the resistance applying means 140, but it may be provided on the downstream side of the ozone filter 102 without any problem.

Since the air having the wind speed distribution on the upstream side of the resistance applying means is given a resistance according to the wind speed distribution by the resistance applying means, the wind speed is almost equal in each flow path (cell of the ozone filter) in the resistance applying means. After being made uniform and passing through the resistance applying means 140, the wind velocity distribution is made uniform as shown in FIG.

The resistance applying means 140 shown in FIG.
As shown in (B), by making the passing wind speed of the inner cross section of the duct substantially constant, it is possible to effectively utilize the entire area of the ozone filter and improve the ozone filter removal rate.

In this case, in FIG. 22, the ozone filter 102 and the resistance applying means 140 are configured so that a space having a constant distance is provided between them.
02 and the resistance applying means 140 may be brought close to or in contact with each other. This is because the wind velocity distribution is made uniform when passing through the resistance applying means, and a space is not necessarily required on the downstream side thereof.

In FIG. 22A, the resistance applying means 140 is arranged on the upstream side of the ozone filter 102, but the resistance applying means 14 is arranged on the downstream side of the ozone filter 102.
You can place 0. On the upstream side of the resistance applying means 140, since the resistance applying means performs a kind of damming, a region where the wind velocity distribution is uniform exists near the upstream side of the resistance applying means, and therefore, on the downstream side of the ozone filter 102. When the resistance applying means 140 is brought into close contact with the resistance applying means 1
Due to the damming of 40, the wind speed distribution passing through the ozone filter 102 will be substantially uniform.

Even in this case, the exhaust fan 100 is located upstream of the ozone filter 102 and on the resistance applying means 14.
It may be on the downstream side of 0, but the exhaust fan 10
The velocity distribution on the suction side of 0 has a smaller velocity difference than the velocity distribution on the exhaust side of the exhaust fan 100.
It is more preferable to dispose the resistance applying means 140 so as to be located on the suction side.

As the material of the filter, a base material made of paper or ceramic coated with activated carbon is used.

FIG. 23 is a diagram for explaining the structure and operation of another form of the duct means.

In the ozone treatment apparatus having the configuration shown in FIG. 22, the resistance applying means 140 has different resistance depending on the flow path length through which the air in the resistance applying means 140 passes. A region where the wind velocity is fast in the cross section of the duct has a large thickness of the resistance imparting means 140, and a region where the wind velocity is slow has a structure where the thickness of the resistance imparting means 140 is thin so that the wind velocity distribution in the duct after passing through the resistance imparting means 140 is uniform. And

The material of the filter may be the same as that shown in the form of FIG.

FIG. 24 is a view for explaining the structure and operation of yet another form of the duct means.

In the ozone treatment apparatus having the configuration of the second embodiment, when the exhaust fan 100 is an axial flow fan, the wind velocity distribution resulting therefrom is CC 'in FIG. 24 (A).
It becomes as shown in FIG. 24 (B) showing a cross section. Therefore, the resistance imparting means 140 may have a donut-shaped thickness structure in which the resistance portion has a relatively small thickness in the portion around the rotation axis of the fan blade and the blade portion has a large thickness. The resistance imparting means 140 has a shape shown in FIGS. 24C and 24D, and since the wind velocity distribution in the duct after passing is uniform, it may be called a rectifier.

FIG. 25 is a view for explaining a duct structure of still another form and its operation.

When the exhaust fan 100 is a sirocco fan or a cross low fan in the ozone processing apparatus having the duct structure of the form shown in FIG. 23, the wind velocity distribution due to it is as shown in FIG. 25 (A). 25 (B) and 25 (C), the resistance applying means 140 has a structural portion that becomes thicker from the central portion of the fan toward the circumferential portion.
The shape is as shown in (1) and makes the wind velocity distribution in the duct uniform after passing through the resistance imparting means 140.

FIG. 26 is a view for explaining the duct structure of still another form and its operation.

In the ozone processing apparatus having the structure shown in FIG. 22, the wind speed distribution by the exhaust fan 100 is shown in FIG.
As shown in FIG. 26 (B) showing the CC ′ cross section of 6 (A), the resistance applying means 140 is shown in FIGS. 26 (C) and (D).
As shown in (1), a high wind velocity portion has a high density of voids in the resistor, and a low wind velocity portion has a low density, so that the wind velocity distribution in the duct after passing the resistance imparting means 140 is uniform.

Although the axial flow fan is used in the embodiment shown in FIG. 26, it goes without saying that a sirocco fan or a cross flow fan can also be used.

Further, in the example of FIG. 19, it is assumed that the density of the voids of the resistor is two, and they are constituted by them, but the structure may be such that the density changes continuously, which is more preferable. It is possible to enhance the effect of uniforming the wind speed.

FIG. 27 is a view for explaining the duct structure of still another form and its operation.

In the ozone processing apparatus having the configuration shown in FIG. 25, the resistance applying means 140 in which the density of the voids of the resistor is changed according to the wind speed is added with the ozone decomposing function of the metal catalyst, activated carbon or the like. Accordingly, the ozone filter 102 used in the embodiment shown in FIG. 27A does not require the ozone filter 102 itself in the embodiment shown in FIG. 27A, and as shown in FIG. The configuration requires only the adding means 140.

FIG. 28 is a view for explaining the duct structure of still another form and its operation.

In the ozone processing apparatus having the configuration shown in FIG. 25, the representative flow velocity of each region is set to a plurality of regions in which the range of the wind velocity difference within the constant value is regarded as one region. The ducts 1 are integrated as a unit by combining the resistance applying means 140 having the corresponding void density for each region.
Place it in 01.

In the wind velocity distribution of FIG. 28A, for example, assume that the wind velocity distribution in the duct 101 is divided into three stages of high speed, medium speed, and low speed, as shown in FIG. In this case, the resistance applying unit 140 is shown in FIG. As shown in FIG. 28 (B), the representative flow velocities of the high speed, medium speed, and low speed regions are set to the average flow velocity of each region, and the high density portion H and medium for the high speed portion corresponding to each average flow velocity are used. 3 parts, M part with medium density for high speed part and L part for low speed part with low density
One is prepared and provided in the duct 101.

In the resistance applying means 140 shown in FIG. 28, the three parts H, M and L are combined,
An example of attachment at one place is shown.

FIG. 29 is a view for explaining the duct structure of still another form and its operation.

In the ozone processing apparatus described in FIG. 3,
The surface roughness of the inner wall surface of the duct 101 on the upstream side of the ozone filter 102 is determined according to the wind velocity distribution in the duct 101.
The fast wind speed is coarse, and the slow wind speed is smooth.

FIG. 29 shows an embodiment using a sirocco fan.

The sirocco fan 100 has an outer peripheral direction (see FIG. 2).
(Upward direction of 9) has a distribution in which the wind speed becomes faster. Therefore, the upper surface (A surface) is roughened to increase the loss on the surface and reduce the wind speed.

On the contrary, the lower surface (B-side) is made smooth to reduce the loss and suppress the decrease in wind speed. The air whose wind speed is reduced on the A surface side flows to the B surface side, and the wind speed distribution in the duct is made uniform.

30 to 35 are views for explaining another example of the duct structure.

In this embodiment, as in the retention system, an electrostatic latent image is formed on another photosensitive member based on the electrostatic latent image formed on the screen photosensitive member with the charging device involved, and the latent image is formed. When developing and transferring with the transfer device on the paper,
Alternatively, an electrostatic latent image formed on one photoconductor with the charging device involved is developed on the same photoconductor to form a developer image,
The present invention can be applied to any type of image forming apparatus in the case of transferring with a transfer unit involved (the copying machine described in FIG. 1 is based on this type).

FIG. 30 shows an image forming apparatus having a corona discharger, which shows an ozone treatment system provided in the above-mentioned system, and FIG. 31 shows a main part of FIG. It is a figure which shows a partial cross section.

In general, the photosensitive member 21 has a photosensitive layer formed on the outer peripheral surface of a metal pipe made of aluminum or the like, and the inside thereof is a space.

Therefore, in order to effectively use this space that is not originally used, the ozone filter 102 and the blade 150 are fixedly provided on the inner wall of the photoconductor 21, and the discharge space 200 (inside the adjacent corona discharger 22) is provided. The communication ducts 111 are provided at both ends of the photoconductor 21 and the corona discharger 22 so that (see FIG. 31) communicates with the inside of the photoconductor 21 as an air flow path.

FIG. 32 is a perspective view showing a schematic structure of the photoconductor 21. As shown in FIG.
1. Flanges 201 and 202 are provided at both ends of the rim 1, and the shaft portion 201a and the circumferential portion 201b of the flange 201 are attached to the rim 2
01c, and there is a gap 20 between the rims 201c.
3, the shaft 201a of the flange 201 has
A rotation support shaft (not shown) is inserted from the body side of the copying machine through the through hole 111a of the communication duct 111.

In addition to the structure of the flange 201, the flange 202 is integrally provided with a gear 202a on its circumferential portion.

Drive is transmitted from the main body side to the gear 202a, the photoconductor 21 rotates, and the blades 150 integrally rotate accordingly. Therefore, the inside of the photoconductor 21 and the communication duct 1
11 and the discharge space 200 inside the corona discharger 22, an air flow circulates in the direction of the arrow in the drawing,
The ozone generated in 1 is sent to the ozone filter 102 and removed.

The structure for improving the airtightness of the circulation passage will be described below.

FIG. 33 shows the photoconductor 21 and the duct 11 for communication.
1 is a view showing a vertical cross section of the connecting portion of FIG. 1, and as shown in the figure, the communication duct 111 facing the void 203 of the flange 201.
31b and the peripheral portion 201b of the flange 201 with a slight gap, or as shown in FIG.
The case side plate 22 of the corona discharger 22 is provided on the surface of the photoconductor 21.
b is brought close to prevent the ozone from leaking through the gap with the photoconductor 21.

As shown in FIG. 31, the flow path between the corona discharger 22 and the communication duct 111 has an opening 204a in the insulating holder 204 which holds the discharge wire 205 of the corona discharger 22 at both ends. Are connected by providing.

FIG. 34 is a view showing another form of the case of the corona discharger. As shown in FIG. 34, openings 207a, 207b are formed along the longitudinal direction of the case side plates 206a, 206b of the corona discharger 22. Is provided.

FIG. 35 shows an embodiment in which the corona discharger 22 thus constructed is covered by a communication duct. As shown in FIG. 35, the case side plate of the corona discharger 22 is shown. A communication duct 111 may be provided so as to cover 206a and 206b, and may be communicated with the inside of the photoconductor 21 as in FIG.

In this case, the air circulated by the blades 150 is
Ozone generated in the discharge space 200 around the discharge wire 205 is passed from the communication duct 111 through the opening 207a of the case side plate 206a of the corona discharger 22 to the communication duct 111 from the opening 207b of the other case side plate 206b. leak.

In this way, ozone can be sent to the ozone filter even if the air blowing pressure of the blades 150 is low, and the surface of the photoconductor 21 and the case side plates 206a, 20c.
It is possible to further prevent ozone from leaking from the gap between 6b.

[0164]

According to the present invention, in addition to the conventional effect of decomposing ozone by light, the light emitted from the light source provided outside the duct means is introduced into the duct means through the transmitting portion for transmitting the light emitted from the light source. Since it is designed to guide the air flow, it improves the airtightness of the duct to prevent ozone from leaking out of the duct means, simplifies the shape of the duct means, allows the duct means to be freely routed, and assembles the duct means and the light source means. Simplification of
The exhaust fan can be made smaller.

Since the light guided in the duct is reflected by the light reflecting portion provided in the duct, the light in the duct is irradiated without being absorbed by the inner wall of the duct so that the light intensity is not attenuated or leaked to the outside. The formed space can be made large enough to decompose ozone, and even if the light transmitting portion is small, a large light existing space can be created in the duct. Then, when the reflection is multiplexed, the processing efficiency can be further improved.

According to the present invention, in addition to the above effects,
Since the heat absorber absorbs infrared rays to raise the temperature of the air flowing in the duct, the decomposition rate of ozone can be increased by the increase of the light and the air temperature, and further, the air temperature in the downstream region of the duct can be raised. Since heat acts on the entire downstream region of the duct where light does not reach, ozone is efficiently decomposed.

Further, since it is heated by the infrared component of light,
No special additional parts, no control, no space and cost burden.

[Brief description of drawings]

FIG. 1 is a sectional view showing an outline of a copying machine according to an embodiment of an image forming apparatus of the present invention.

FIG. 2 is a schematic block diagram of a circuit in the copying machine according to the embodiment of the present invention.

3A and 3B are views for explaining a schematic configuration of an embodiment of the copying machine according to claim 1 and an operation thereof, wherein FIG. 3A shows an ozone treatment section, and FIG. 3B shows a duct section in a discharge space. It is shown.

FIG. 4 is a diagram for explaining a configuration for irradiating light into a duct which is a main part of the embodiment of FIG. 3 and an ozone decomposing action by light.

5 is a diagram showing a specific configuration of an opening provided in a duct in the same embodiment as FIG.

FIG. 6 is a diagram showing another specific configuration in the same embodiment as FIG.

FIG. 7 shows the relationship between the characteristics of the light source and the light transmitting portion, (A)
FIG. 3B is a diagram showing a case of a laser or an LED, and FIG. 7B is a diagram showing a case of a halogen lamp or a fuse bulb.

FIG. 8 is a diagram showing a relationship between a characteristic curve of a light source and a light transmitting portion and an ozone resolution curve.

FIG. 9 is a diagram for explaining the configuration of the duct and its action.

FIG. 10 shows another embodiment of the duct.

FIG. 11 is a diagram for explaining the configuration of the duct configuration and the action of heat in ozone decomposition.

FIG. 12 is a graph showing the relationship between ambient temperature and ozone decomposition rate.

FIG. 13 is a diagram showing a configuration of a duct and its operation.

FIG. 14 is a diagram illustrating a configuration of a duct applied to a copying machine and an operation of a fluorescent lamp for image formation.

FIG. 15 shows a duct using a white light source in a liquid crystal shutter type printer.

FIG. 16 shows a configuration of an embodiment of a duct, (A) is an overall schematic view, and (B) is a sectional view taken along line CC ′ of (A).

FIG. 17 is a diagram for explaining the configuration and operation of another embodiment of the duct, (A) is a schematic diagram of the whole,
(B) is a CC 'sectional view of (A).

FIG. 18 shows a plan view of an optical system of a copying machine.

19 is a diagram showing a main part of an embodiment of a duct applied to the copying machine of FIG.

FIG. 20 is a diagram for explaining the configuration of a duct for making the ozone filter replaceable and its operating state.

FIG. 21 is a diagram for explaining the duct configuration of another embodiment and its operating state.

FIG. 22 is a view for explaining the structure of a duct for equalizing the flow velocity in the cross section of the flow path and its function.

FIG. 23 is a diagram for explaining the configuration of another duct and its operation.

FIG. 24 is a diagram for explaining the configuration of another duct and its operation.

FIG. 25 is a diagram for explaining the configuration of another duct and its operation.

FIG. 26 is a diagram for explaining the configuration of another duct and its operation.

FIG. 27 is a diagram for explaining the configuration of another duct and its action (B) in comparison with the previous embodiment (A).

FIG. 28 is a diagram for explaining the configuration of another duct and its operation.

FIG. 29 is a view for explaining the configuration of another duct and its operation.

[Fig. 30] Fig. 30 is a diagram for explaining the configuration and operation of another duct using a closed loop duct.

31 is a diagram showing a partial cross-sectional view of a photoreceptor and a corona discharger, which is a main part of FIG. 30.

FIG. 32 is a perspective view showing a schematic configuration of a photoconductor.

FIG. 33 is a diagram showing a cross-sectional view of a connection portion between a photoconductor and a communication duct.

FIG. 34 is a view showing another form of the case of the corona discharger.

FIG. 35 is a diagram showing a related configuration of the corona discharger and the communication duct in the form of FIG. 34.

FIG. 36 is a diagram for explaining the configuration and operation of a conventional device, FIG. 32 (A) is a schematic view of a main part, and FIG. 32 (B).
FIG. 3 is a side view of the same device.

FIG. 37 is a diagram for explaining the same device as that of the modification of the conventional example of FIG. 32 and its operation.

FIG. 38 is a diagram for explaining the same device as that of the modification of the conventional example of FIG. 32 and its operation.

[Explanation of symbols]

1 ... Copier body, 2 ... Optical system, 3 ... Copy lamp, 3a
... White light emitting region, 3b ... Ultraviolet emitting region, 4 to 7 ... Mirror, 8 ... Zoom lens, 21 ... Photoconductor, 22 ... Charger, corona discharger, 22b, 206a, 206b ... Case side plate, 23 ... Developing section , 24 ... transfer machine, 25 ... static eliminator,
26 ... Original cover, 27 ... Automatic original feeding device, 28 ... Original feeding path, 29a, 29b ... Drum, 30 ... Paper feeding section, 31
... Registration rollers, 32 ... Conveying device, 33 ... Fixing unit, 3
4 ... Ejection tray, 35 ... Paper transport path, 36 ... Intermediate tray, 37 ... Inverting section, 38 ... Paper feeding roller, 40 ... Master C
PU, 41 ... Slave CPU, 44 ... Operation unit circuit, 45
... Display section circuit, 46 ... Lamp lighting circuit, 47 ... Copy lamp lighting circuit, 48 ... Process control circuit, 49 ... Motor drive circuit, 59 ... Operation section circuit, 100 ... Exhaust fan, 1
01 ... Duct means, 101a ... Suction opening, 101
b ... Exhaust opening, 101c ... Part of wall surface notched, 101d ... Transparent member, 101e ... Light transmitting part formed on wall, 101f ... Opening part, 101g ... Rib, 1
01h ... inside the duct, 102 ... ozone filter, 10
3 ... Light source, 104 light reflecting member, 105 ... light absorbing member, 1
06 ... Heat absorber, 107 ... Original width area, 108 ... Original area, 111 ... Communication duct, 111a ... Through hole, 111
b ... end part, 130 ... exterior, 130a ... exterior duct part, 1
40 ... Resistance imparting means, 150 ... Blades, 200 ... Discharge space, 201, 202 ... Flange of photoconductor, 201a ... Shaft portion of flange, 201b ... Circumferential portion, 201c ... Rim, 2
Reference numeral 02a ... Gear, 203 ... Void, 204 ... Insulating holder, 204a, 207a, 207b ... Opening, 205 ... Discharge wire, 300 ... Cover, 301 ... Reflecting member, 30
3 ... Seal member, 310 ... Light intensity distribution, 310a, 31
0b ... Emission wavelength range, 311 ... Light transmittance, 311a, 31
1b, 311c ... Light transmission wavelength range, 312 ... Ozone resolution curve, 320 ... Reflector cover, 330 ... Lamp unit, 331 ... Mirror unit, 332 ... Unit support base, 333 ... Drive wire, 334 ... Pulley.

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) G03G 21/00 370-540 G03G 21/20

Claims (2)

(57) [Claims] 1. An image forming apparatus comprising: a corona discharger; duct means for passing air containing ozone for collecting ozone generated in the corona discharger; and a light source provided outside the duct means. A light reflecting member is attached to the inner wall of the duct means, and a light absorber is attached to the inner wall of the outer duct means on the upstream side of the position where the light reflecting member is attached, and the light reflecting member is attached to the light reflecting member. An image forming apparatus, wherein the light source is provided outside the duct means at a position facing each other. 2. A heat absorber that emits heat by absorbing infrared light contained in light guided into the duct means is provided inside the duct means. Image forming device.