JPS60133463A - Electrostatic recording apparatus - Google Patents

Abstract

PURPOSE:To enhance ozone adsorption efficiency of a filter and efficiently remove ozone produced from corona dischargers by fitting an ozone adsorption filter to the external installed member of a heat fixing device and raising the filter in temp. with heat produced from the fixing device. CONSTITUTION:Heat produced from a heat fixing device 8 having a heating roller 7 is conducted through the externally installed member of the device 8 to an ozone adsorption filter 10. The ozone adsorption efficiency of the filter 10 rises in accordance with its temp. rise. The air contg. ozone generated by actuating corona dischargers 2, 3, 4 for electrostatic charging, transferring, and destaticizing is sucked through the ozone adsorption filter 10 enhanced in adsorption efficiently with an exhausting fan 11, and the air freed of ozone is exhausted out of the apparatus.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrostatic recording device having an adsorption filter capable of removing ozone with high industrial application rate.

Conventional Structure and Problems There has been rapid progress in miniaturization of electrostatic recording devices such as copying machines in recent years. When downsizing, it is necessary to increase the mounting density of device parts, and as a result, the temperature inside the machine increases due to heat from the heating type fixing device, etc., which causes problems such as toner assimilation and changes in the performance of the photoreceptor drum. . Furthermore, when a corona discharger is used in the air, a large amount of ozone is generated by the reaction between active oxygen particles and oxygen molecules, which are generated by inelastic collisions between charged particles accelerated in the discharge field and oxygen molecules. Since this ozone is harmful to the human body, it is necessary to remove it.For example, when using continuous Me in a room with a certain volume, the ozone concentration at iH+9r at a distance of 3 cm from the device is 0. The situation in the US is such that it is difficult to keep the level below 1 ppm. To prevent the temperature inside the aircraft from rising, the amount of exhaust air can be increased. However, in order to effectively remove ozone, it is necessary to reduce the ozone and ozone absorption, l/l, for a constant ozone adsorbent, or increase the amount of ozone adsorbent for a constant ozone adsorbent.

Conventionally, electrostatic recording devices such as copying machines have been equipped with a thick drawer and an air fan for preventing temperature rise inside the machine, and an ozone adsorption filter and an ozone exhaust fan for removing ozone. .

A conventional electrostatic recording device will be explained with reference to the figure below (h+f). Figure 1 shows a cross-sectional view of the main part of the conventional electrostatic recording device. In Figure 1, 1 indicates the surface of the electrostatic recording device. a photoreceptor drum having a functionally separated organic photoconductive material;
2 is a charging corona discharger that applies a surface charge to the photoreceptor drum, 3 is a transfer corona discharger that transfers the toner image on the photoreceptor drum to paper, and 4 is a static eliminator that removes the residual charge on the photoreceptor drum. Corona discharger, 6 is an ozone adsorption filter that uses metal oxides such as manganese dioxide and lead peroxide as ozone adsorbents, 6 is an ozone exhaust fan that exhausts the air after ozone adsorption to the outside of the machine, and 7 is a heating roller. In the drawing, the upper roller has a halogen lamp inside, and the lower roller is a driven roller of the upper roller. 8 is a heating type fixing device having an exterior member and a heating roller 7 inside, and 9 is an exhaust fan for preventing temperature rise inside the machine. Wl is the air that is exhausted outside the aircraft by the exhaust fan 9 (At, W2 is the airflow that passes through the ozone adsorption filter 6 and is exhausted to the outside of the aircraft), and the dashed arrow indicates the airflow inside the aircraft. The broken lines in the trenches indicate the main parts of the electrostatic recording device +14 in the r-plane view, the exposure section and the development section.

The paper feed section and the like are omitted because they are common to known electrostatic recording devices.

The evacuation operation of the conventional electrostatic recording apparatus constructed as described above will be described below. First, the corona discharger 2. Ozone is generated when the corona discharger 3 for transfer and the corona discharger 4 for removal are operated at r: 2%. This ozone-containing air is sucked along the photoreceptor drum 1 by the ozone exhaust fan 6, becomes Vv2, and is exhausted to the outside of the machine.

On the other hand, the heat generated by the heating roller T at the top of the heating type fixing device 8 and the moisture generated from the paper passing through the heating roller 7 are removed by an exhaust fan 9 installed at the top of the heating type fixing device 8 as Wl. I feel like I'm outside. However, in the configuration described above, the ozone adsorption filter operates at an internal temperature close to room temperature, and since the internal temperature is low especially when an electrostatic recording device is first used, there is a tendency for highly concentrated ozone to be emitted. .

OBJECTS OF THE INVENTION The present invention solves the above-mentioned problems and provides an electrostatic recording device having an ozone adsorption filter that can constantly and efficiently remove ozone.

Structure of the Invention In order to achieve the above object, the electrostatic recording device of the present invention comprises:
A heating type fixing device having an exterior member, a corona discharger, and an ozone adsorption filter for removing ozone generated upstream of the corona discharger, and the ozone adsorption filter is attached to the exterior part. When heat generated by the fixing device is guided to the filter through the exterior member, the ozone adsorption efficiency of the filter is increased.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 2 shows a sectional view of a main part of an electrostatic recording device according to an embodiment of the present invention. In Figure 2,
1 is a photosensitive drum, 2 is a charging corona discharger, 3 is a transfer corona discharger, 4 is a static elimination corona discharger, 7 (l-1
l: heating roller; 8 is a heating type fixing device; the broken line arrow indicates the air flow inside the machine;
This is the same as i'f4rJ)j in the conventional example shown in the figure. 1
0 is an ozone adsorption filter provided on the exterior member of the heating type fixing device 8 containing a heating roller, and 11 is an ozone adsorption filter that uses a metal filtrate such as mankan dioxide or lead peroxide as an ozone adsorbent; This is an exhaust fan for use. Also,
W3 is an air flow exhausted to the outside of the machine by the exhaust fan 11.

As mentioned above, the electrostatic recording device of the original embodiment, which was 1 m long,
The ozone adsorption filter 1o is provided on an exterior member of a heating type fixing device 8 having a heating roller 7. Therefore, the heat generated by the heating type fixing device 8 is transmitted to the ozone adsorption filter 10 via the exterior member of the fixing device 8 described in 11J.

Since the adsorption efficiency of the ozone adsorption filter 1° generally has temperature dependence, the adsorption efficiency increases as the temperature rises.

On the other hand, charging corona discharger 2. Corona discharger for transfer 3.
In the static elimination corona discharger 4, ozone is generated during the operation of the soup stock. This air containing all ozone is sucked by the exhaust fan 11, passes through the ozone adsorption filter 1O with increased ozone adsorption efficiency, ozone is removed, and the air is vented outside the machine as n5W3. The heat generated by the type fixing device that does not contribute to the temperature rise of the ozone adsorption filter 10 and the moisture generated from the paper at the heating roller 7 are exhausted together with the air after ozone has been removed by the exhaust fan 11, W3. becomes.

Next, this example will be explained in detail using specific data.

The electrostatic recording device used has the main parts arranged as shown in Fig. 2, and has a width of 65 CrrL x depth of 5 o r: ttt.
X 1C: Has a good external shape with a length of 32 cm. The air volume of υtoki fan 1○ is approximately 802″c per minute.

The heat source of the heating roller was a 900 W chloride lamp, and the temperature set for the surface phase was 100°C. -1: The ozone adsorption filter 1o has a mesh size of 1.5111
The surface of a 1110 stainless steel mesh was completely coated with manganese dioxide powder using a polyester resin as a binder, and 10 sheets of this mesh were stacked and placed in a frame of 10 CTL x 8 cm as shown in Figure 3. I used something. 14 is an ozone adsorbent, and 15 is an adsorbent holding member.

Under the above conditions, 300 copies were continuously made at a copying speed of 84 sheets - 16 copies per minute at a room temperature of 26°C. As a result, the ozone concentration at a point s o cm @ n from the exhaust fan was measured using a Model 1Q○3 Yami Ozone Isometry Meter manufactured by ENVIRONMENTAL, and the maximum was O9○7ppm, and the temperature at the fill part was was 48°C. At this time, the ozone concentration was 0.32 ppm after excluding the number of sounds from the ozone adsorption filter.

On the other hand, for comparison, based on the arrangement of each main part in Fig. 1, the valley exhaust air volume of exhaust fans 6 and 9 was set to 50°C per minute.
When continuous copying was performed under the same conditions as above, the ozone concentration was recorded at a maximum of 0.3 ppm, and the temperature of the filter section at this time was 28°C. At this time, when the ozone adsorption filter was removed, the ozone concentration was 0.35 ppm.

As described above, according to this embodiment, by providing the ozone adsorption filter on the exterior member of the heating type fixing device, the heat generated by the fixing device is transferred to the filter through the exterior member of the fixing device. Raise the temperature. This allows the ozone adsorption filter to efficiently remove generated ozone.

Other embodiments of the present invention will be described below with reference to the drawings. FIG. 4 is a sectional view showing a main part of an electrostatic recording device according to another embodiment of the present invention. In Fig. 4, 1 is a photosensitive drum, 2 is a charging corona discharger, and 3 is a photosensitive drum.
4 is a corona discharger for transfer, 4 is a corona discharger for static elimination, and 7 is a heating roller, which is the same as the configuration of the conventional example shown in FIG. Reference numeral 11 denotes an exhaust fan, which has the same configuration as the embodiment shown in FIG. 12 is an ozone adsorbent; 13 is a heating type having heating rollers 7 inside; the entire exterior member is made of a material with good thermal conductivity such as aluminum alloy; and the exterior member and the holding member of the ozone adsorption filter are integrally formed. It is a fixing device. 1, W4 is the air flow exhausted to the outside of the aircraft by the exhaust fan 11.

The exhaust operation of the electrostatic recording apparatus of this embodiment constructed as described above will be explained below.

First, a heating type fixing device exterior member and an ozone adsorption filter integrally formed are used as heat transfer means, and the heat generated by the heating type fixing device is transferred to the ozone adsorbent through the heat transfer means. Legend has it that it was stolen. Ozone adsorption efficiency increases as the operating temperature increases. On the other hand, charging corona discharger 2. The ozone generated during the operation of the transfer corona discharger 3 and static elimination corona discharger 4 is sucked out by the exhaust fan 11.

Claims (2)

[Claims] (1) A heating type fixing device having an exterior member, a corona discharger, and an ozone adsorption filter for removing ozone generated from the corona discharger, and the ozone adsorption filter is attached to the exterior member. In particular, an electrostatic recording apparatus characterized in that the heat generated by the fixing device is guided to the filter via the exterior member to raise the temperature of the ozone adsorption filter. (2) A patent claim characterized in that the ozone adsorption filter including the ozone adsorbent and its holding part 4 is integrally formed with the holding part of the ozone adsorption filter and the exterior part of the heating type fixing device. The electrostatic recording device according to scope (1).