JPH0486845A - Image forming device - Google Patents

Abstract

PURPOSE:To prevent a temperature in a room from rising because of high-temperature air exhausted from a device main body by installing a 1st duct through which the exhaust port of the device main body communicates with the inlet port of a placing table, a ventilation flue through which an inlet port and an exhaust port provided in the placing table are made to communicate and a 2nd duct through which the exhaust port communicates with the outside of the room. CONSTITUTION:The inlet port 62 and the exhaust port 63 are formed on the one side surface part of the placing table 61, and a louver 63a is provided in the exhaust port 63. Then, the ventilation flue 65 is constituted by a partition plate 64 in the device main body 1. Meanwhile, the exhaust ports 57 and 58 of the device main body 1 and the inlet port 62 are made to communicate through the 1st duct 71. The exhaust port 63 communicates with the outside of the room through the 2nd duct 72. In the case of forming an image, cooling fans 59 and 60 are rotated and the high-temperature air in the device main body 1 is exhausted from the exhaust ports 57 and 58. The exhausted air is sucked in the ventilation flue 65 from the inlet port 62 of the placing table 61 through the 1st duct 71 and passes through a filter 67, then it is exhausted from the exhaust port 63 to the outside of the room through the 2nd duct 72.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention (Field of Industrial Application) The present invention relates to an image forming apparatus that is applied, for example, as an electronic copying machine.

(Prior art) When copying an original, an electronic copying machine irradiates the original set on the original platen with light and forms an image of the reflected light from the original onto a photosensitive drum via an optical system. to form an electrostatic latent image of the document. After this electrostatic latent image is developed by supplying toner with a developing device, this developer image is transferred onto paper by the action of a transfer charger. Afterwards,
The paper on which this image has been transferred is separated from the photosensitive drum by a peeling charger, and then sent to a fixing device, where it is fixed and then discharged.

By the way, during image formation, high heat is emitted from the optical system, the fixing device, the high voltage transformer, etc., resulting in a high temperature inside the apparatus body. For this reason, a cooling fan is provided within the apparatus main body, and air within the apparatus main body is discharged by rotation of the cooling fan.

(Problem to be solved by the invention) However, in the past, high-temperature air discharged from the device body was discharged indoors, which caused the indoor temperature to rise, resulting in unnecessary costs for cooling etc. was there.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide an image forming apparatus that prevents the indoor temperature from increasing due to high-temperature air discharged from the apparatus main body.

[Structure of the Invention] (Means for Solving the Problems) In order to solve the above problems, the present invention includes a device main body, a mounting table on which the device main body is placed, and a side surface of the device main body. an exhaust port for discharging air from inside the apparatus main body; an intake port and an exhaust port provided on the side surface of the mounting table; a first duct that communicates the exhaust port of the apparatus main body with the intake port of the mounting table; , a ventilation passage provided in the mounting table that communicates the intake port with the exhaust port, and a second duct that communicates the exhaust port with the outside.

(Function) During image formation, the exhaust gas discharged from the exhaust port of the apparatus main body is introduced into the ventilation path from the intake port of the mounting table via the first duct, and is further introduced into the ventilation path from the exhaust port of this ventilation path. This prevents the indoor temperature from rising by discharging the air outside through the duct.

(Example) The present invention will be described below with reference to an example shown in FIG.

In the figure, 1 is a main body of the apparatus, and this main body 1 of the apparatus is placed on a mounting table 61.

The apparatus main body 1 includes built-in image forming process constituent means 2 such as charging, exposure, development, transfer, peeling, cleaning, static neutralization, and fixing. A stand (hereinafter referred to as platen glass) 3 is provided.

Further, a paper feed cassette 10.11 containing paper such as plain paper to be supplied to the image forming process configuration means 2 is inserted into one side of the apparatus main body 1, and on the left side of the apparatus main body 1, A tray (not shown) is provided for collecting paper in the fixing device.

The image forming process configuration means 2 has the following configuration. That is, a drum-shaped photoreceptor 20 as an image carrier is arranged approximately at the center of the apparatus main body 1, and around this photoreceptor 20, a charging device 21, an exposure device ( exposure section 22a1 of optical system) 22
Developing devices 23a, 23b, transfer device 25. Peeling device 26
．． Cleaning device 27. Static eliminators 28 and the like are sequentially arranged.

Furthermore, the paper feed cassette 10 is provided in the apparatus main body 1.
．． The paper automatically fed from 11 or manually fed through the manual paper feed table 29 is transferred to the main body 1 of the apparatus via the image transfer section 30 between the photoreceptor 20 and the transfer device 25. A paper transport path 31 leading to the tray provided on the left side is formed.

A pair of registration rollers 32 is arranged on the upstream side of the image transfer section 30 of the paper conveyance path 31, and a fixing device 3 is arranged on the downstream side.
3 and a pair of paper ejection rollers 34 are arranged. Further, a conveyor belt 35 is disposed between the peeling device 26 and the fixing device 33.

Further, in the vicinity of the attached portion of the paper feed force cellar 1-10.11, there is a pickup roller 36 for taking out sheets one by one, and a pickup roller 36 for receiving the sheets taken out via this pickup roller 36 and for moving the paper to the paper conveyance path 31. Separation and conveyance means 37 consisting of a conveyance roller and a separation roller is provided.

Further, the exposure device 22 illuminates the back of the document set on the platen glass 3 provided on the top surface of the device main body 1 with an exposure lamp 41 as a light source surrounded by a reflector 40, and uses reflected light from the document. , first reflective mirror 4
2. The light is guided to the lens 45 via the second reflecting mirror 43 and the third reflecting mirror 44 in order, and then the light transmitted through the lens 45 is guided to the fourth reflecting mirror 46 and the fifth reflecting mirror 4.
7, a sixth reflecting mirror 48 and a slit glass 49 in order to guide the light to the photoreceptor 20.

The exposure lamp 41 and the first reflection mirror 42 surrounded by the reflector 40 are mounted on a first carriage (not shown) that is movable back and forth along the lower surface of the platen glass 3, and Mirror 43 and third
The reflective mirror 44 of the second carriage (not shown) moves in the same direction at half the speed of the first carriage.
The first and second carriages move from left to right in the state shown in FIG. 2 with the carriage shaft etc. as a guide, thereby applying light to the original set on the platen glass 3. is scanned to expose an image corresponding to the original onto the photoreceptor 20 by slit exposure.

Further, a suction port 56 is formed on one side of the apparatus main body 1, and discharge ports 57 and 58 are formed on the other side and the bottom. The outlet 57 is located inside the device main body 1.
．． Cooling fans 59 and 60 are disposed opposite to 58.

When copying, a document is first set on the platen glass 3, and then a copy button (not shown) is turned on. As a result, the exposure lamp 41 is turned on and the first and second carriages are moved along the platen glass 3.

By this movement, the original is scanned with light, and the light reflected via the original is reflected by the first to third reflecting mirrors 42, 43.
．． 44 to a lens 45, and further passes through this lens 45 to fourth to sixth reflecting mirrors 46, 47.
．． 48 and a slit glass 49 onto the photoreceptor 20 . The surface of the photoreceptor 20 is charged by a charging device 21, and an electrostatic latent image of the document is formed by this image formation. This electrostatic latent image is developed by being supplied with developer by the developing device 23.

On the other hand, at this time, sheets are taken out from the paper feed cassette 10 or 11 by the pickup 36, separated one by one by the separating and conveying means 37, and sent to the registration rollers 32. After the paper is aligned by registration rollers 32, it is sent to an image transfer section 30 between the photoreceptor 20 and the transfer charger 25, where the developer image on the photoreceptor 20 is transferred. The paper to which this image has been transferred is peeled off from the photoreceptor 20 by the action of the peeling charger 26, and is conveyed by the conveyor belt 35. Then, this paper is sent to a fixing device 33, the image is fixed thereon, and the paper is ejected to an ejection tray (not shown) via an ejection roller 34.

Incidentally, an intake port 62 and an exhaust port 63 are formed on one side of the mounting table 61, and the exhaust port 63 is provided with a louver 63a.

Further, the inside of the apparatus main body 1 is partitioned by a partition plate 64 to form a ventilation passage 65, and the intake port 62 and the exhaust port 63 are communicated via this ventilation passage 65.

Further, a filter 67 is provided approximately at the center of the ventilation passage 65.

On the other hand, the exhaust ports 57 and 58 of the apparatus main body 1 and the intake port 62 of the mounting table 61 are communicated via a first duct 71.

Further, the exhaust port 63 of the mounting table 61 is connected to the second duct 72.
It is communicated with the outdoors through.

The second duct 72 is fixed to the mounting table 61 with screws 73.

The internal space of the mounting table 61 that is partitioned off by the partition plate 64 and on the opposite side from the ventilation path 65 serves as a cassette storage section.

During image formation, the cooling fans 59 and 60 are rotated, and as a result of this rotation, high-temperature air within the apparatus main body 1 is discharged from the exhaust ports 57 and 58. This exhaust is arrow A
, B, the mounting table 6 is passed through the first duct 71.
It is sucked into the ventilation passage 65 from the first intake port 62, passes through the filter 67, and then flows from the exhaust port 63 to the second duct 72.
is discharged outdoors through the

As mentioned above, the high-temperature air inside the device main body 1 is
The air is sent to the ventilation path 65 in the mounting table 61 through the duct 71, and is exhausted from this ventilation path 65 to the outside through the second duct 72, so the indoor temperature does not rise and the cost of cooling the room is reduced. can be reduced.

Note that the present invention is not limited to the above-mentioned embodiment, and as shown in FIG. 2, the first and second ducts 8182 may be configured in a bellows shape to be expandable and retractable.

According to this embodiment, the distance between the outlet 57, 58 of the apparatus main body 1 and the intake port 62 of the mounting table 61, and the distance between the
and the first and second ducts 8 depending on the distance to the wall surface.
1.82 can be expanded and contracted to connect, which is convenient.

In addition, as shown in FIGS. 3 and 4, the lid body 91.9
first and second exhaust ports 93.9 opened and closed by
A plurality of exhaust ports 93 and 94 may be formed and these exhaust ports 93 and 94 may be used selectively.

That is, as shown in FIG. 3, if there is no sorter etc. near the exhaust port 93, the exhaust port 93 and the outside are communicated via the second duct 95, and as shown in FIG. In addition, if there is a sorter 97 near the exhaust port 93, the second
The exhaust port 94 of the exhaust port 93 is closed by the cover body 92.
Alternatively, the exhaust port 93 may be communicated from the floor surface 98 to the outside via the duct 96.

In addition, as shown in FIG. 5, the ventilation passage 6 inside the mounting table 61
5 is provided with an extension part 65a that extends to the upper side of the cassette storage part 66 inside the mounting table 61, and the exhaust gas is allowed to flow through this extension part 65a as shown by the arrow.
6 may be heated.

According to this embodiment, there is no special need for a heating source for preventing moisture in the cassette storage section 66, and costs can be reduced.

Furthermore, as shown in FIG. 6, a gate 102 is rotatably provided in the ventilation passage 65 as an opening/closing member for opening and closing the extension part 65m, and a temperature sensor is provided in the cassette storage part 66 to detect the temperature of the gate 102. 103 may be provided, and the gate 102 may be opened or closed depending on the temperature detected by the temperature sensor 103.

That is, when the detected temperature is high, the gate 102 is closed and the exhaust gas is directly exhausted from the exhaust port 63, and when the detected temperature is low, the gate 102 is opened and the exhaust gas is allowed to flow to the extension part 65a and the cassette storage section 66. heat up.

The gate 102 is connected to the shaft 10 as shown in FIG.
A lever 107 is attached to one end of the shaft 105 protruding from the mounting frame 106 with a screw 108.

A solenoid 10 is installed at the tip of this lever 107.
8 are connected. Furthermore, a coil spring 109 is connected to a midway portion of this lever 107 and is biased.

When the solenoid 108 is turned on, the lever 107 is rotated against the biasing force of the coil spring 109, and the gate 102 is thereby rotated upward to close the extending portion 65a of the ventilation passage 65. do. Also, solenoid 1
08 is turned off, the lever 107 is rotated in the opposite direction by the biasing force of the coil spring 109, and thereby the gate 102 is rotated downward and the extending portion 65 of the ventilation passage 65 is rotated.
Open a.

Further, as shown in FIG. 8, the partition plate 6 inside the mounting table 66
A large number of fins 121 may be attached to the inner surface of the cassette housing 66, and heat may be radiated from these fins 121 to heat the cassette storage section 66.

In addition, as shown in FIGS. 9 and 10, the mounting table 61
The filter 67 in the ventilation passage 65 may be slidably provided via the rail 112 so that the filter 67 can be easily replaced.

Furthermore, as shown in FIG.
A fan 113 is provided in the main body 1 of the device.
It may be electrically connected to a power source 114 inside the printer via a connector 115, and the rotation speed may be controlled so that the speed is high during copying and low during ready.

In this case, the rotation of the fan 113 is stopped by turning off the power switch of the copying machine.

Further, as shown in FIG. 12, the exhaust port 63 of the mounting table 61
A louver 63a... is rotatably provided, and this louver 63a... is rotatably provided.
The direction of exhaust gas may be varied by rotating the parts 3a.

That is, as shown in FIG. 13, a support shaft 115 and a protrusion 116 are formed at both ends of the louvers 63a, and the support shafts 115 of the louvers 63a...
17, and a protrusion 116 is fitted into a fitting hole 119 of a lever 118 that is vertically movable.

The lever 118 is biased and fixed by a coil spring 120.

Therefore, if there is no obstacle such as the sorter 121 near the exhaust port 63 of the mounting table 61, the lever 118
move downward.

As a result, the louvers 63a... rotate downward about their support shafts 115, and the exhaust gas is exhausted downward.

Further, if there is an obstacle such as the sorter 121 near the exhaust port 63 of the mounting table 61, the lever 118 is moved upward.

As a result, the louvers 63a... rotate upward about their support shafts 115, thereby preventing the exhaust gas from being discharged upward and being blown toward the sorter 121.

Note that the louvers 63a may be rotated by a mechanism as shown in FIG. 14.

That is, the arm 124 is rotatably attached to the lower end of the support frame 122 via the support shaft 123.
One end is connected to the lower end of the lever 125 and also connected to the lower end of the support frame 122 via a coil spring 126.

Therefore, the attachment of the sorter 121 is sometimes
The lower end of 4 is pressed in the direction of arrow E by the sorter 121, rotates upward against the biasing force of the coil spring 126, and the lever 125 is moved upward to move the louver 67a.
... is rotated upward.

Also, when the sorter 121 is released, the coil spring 126
Due to the biasing force, the lever 125 is moved downward and the arm 124 is rotated downward, so that the louvers 63a...
is rotated downward.

[Effects of the Invention] As explained above, according to the present invention, high-temperature air inside the apparatus main body is sent to the ventilation path in the mounting table through the first duct, and from this ventilation path to the second duct. Since the air is exhausted to the outside through the air vent, the temperature inside the room does not rise and the cost for cooling the room can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an electronic copying machine which is an embodiment of the present invention, and FIG. 2 is a sectional view showing a first other embodiment of the invention.
3 and 4 are cross-sectional views showing a second other embodiment of the present invention, FIG. 5 is a cross-sectional view showing a third other embodiment of the present invention, and FIG. 6 is a cross-sectional view showing a third other embodiment of the present invention. A sectional view showing another example of No. 4,
FIG. 7 is a perspective view showing the gate driving section, FIG. 8 is a cross-sectional view showing a fifth other embodiment of the present invention, and FIG. 9 is a cross-sectional view showing a sixth other embodiment of the present invention. 10 is a perspective view showing the mounting table, FIG. 11 is a cross-sectional view showing a seventh other embodiment of the present invention, and FIG. 12 is a cross-sectional view showing an eighth other embodiment of the present invention. 13 is a perspective view showing the louver driving section, and FIG. 14 is a perspective view showing another example of the louver driving section. 1... Device main body, 57.58... Discharge port, 61...
・Placement table, 62...Intake port, 63...Exhaust port, 65
... Ventilation duct, 71... First duct, 72... Second duct.

Claims (1)

[Scope of Claims] 1. An apparatus main body having a means for forming an image on an image carrier and a means for generating heat in conjunction with the image forming operation; a mounting table on which the apparatus main body is placed; an exhaust port provided on the side surface of the device body for exhausting the air inside the device body; an intake port and an exhaust port provided on the side surface of the above-mentioned mounting stand; an exhaust port of the above-mentioned device main body and an intake port of the above-mentioned placement stand; a first duct that communicates with the air, a ventilation passage provided in the mounting table that communicates the intake port with the exhaust port, and a second duct that communicates the exhaust port with the outside. Features of the image forming device. 2. The image forming apparatus according to claim 1, wherein the first and second ducts are configured to be expandable and contractible. 3. The image forming apparatus according to claim 1 or 2, wherein a plurality of openable and closable exhaust ports are formed on the mounting table, and these exhaust ports are selectively communicated with the outside via the second duct. 4. It has a paper storage section for storing paper inside the mounting table,
4. The image forming apparatus according to claim 1, wherein an extending section along the paper storage section is provided in the ventilation path, and the paper storage section is heated by heat of exhaust gas flowing through the extension section. 5. An opening/closing member for opening and closing the extension part is provided inside the mounting table, and a detector for detecting the temperature is provided in the paper storage section, and the opening/closing member is operated according to the temperature detected by the detector. The image forming apparatus according to claim 4, wherein the paper storage section is opened and closed. 6. The image forming apparatus according to claim 1, wherein an air filter is provided in the ventilation path of the mounting table, and exhaust gas is discharged through the air filter. 7. The image forming apparatus according to any one of claims 1 to 6, further comprising a suction means for forcibly suctioning exhaust gas at the intake port of the ventilation passage. 8. The image forming apparatus according to claim 7, wherein the suction means is powered and driven by a power supply within the apparatus main body. 9. The image forming apparatus according to claim 1, further comprising variable means for varying the direction of exhaust air at the exhaust port of the ventilation passage.