JPH043309Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an electrostatic copying machine.

Conventional electrostatic copying machines are equipped with individual heaters to prevent condensation on optical devices such as lenses and mirrors, as well as on the photoreceptor. Therefore, condensation is prevented. In such prior art, heaters are provided individually, which has the drawback of increasing the number of parts, increasing costs and complicating the mechanism.

An object of the present invention is to provide an electrostatic copying machine that has a small number of parts and that can reliably prevent dew condensation and moisture on the optical device, photoreceptor, and copy paper in the paper feed cassette.

The present invention provides a processing circuit 26 for controlling the copying operation.
and a memory 35 for storing information from the processing circuit 26.
and a rechargeable battery 34 for powering the memory 35.
a power supply unit 27 for constantly energizing the processing circuit 26, memory 35, and battery 34; and a plurality of moving optical elements 9, 10, 11, and 12 moving from the rest position to the upper part of the body 1 of the copying machine. The placed document is irradiated with light while moving, and the light is transferred to the photoreceptor 1.
an optical device 8 that guides and exposes an electrostatic capacitor 5 to light, and the power supply section 27 is disposed almost directly below the plurality of moving optical elements 9, 10, 11, 12 in rest positions. It is a type copying machine.

In a preferred embodiment, the power supply unit 27 is partitioned from the optical device 8 by first partition plates 28 and 30, and is mounted on a second partition plate 25 provided below the first partition plates 28 and 30. Said plurality of moving optical elements 9, 10, 1 of the optical device 8 in the rest position
It is characterized by being supported almost directly under 1 and 12.

In a preferred embodiment, the first partition plate 2
8 and 30 have first through holes 29 that open facing the upper space in the fuselage 1 where the optical device 8 is provided.
and a second through hole 31 that opens facing at least the lower space in the body 1 where the photoreceptor 15 is provided.

FIG. 1 is a longitudinal cross-sectional view of a moving type copying machine with a simplified optical device according to an embodiment of the present invention. Copy sheets in paper feed cassettes 2 and 3 mounted on the body 1 of the copying machine are conveyed by a conveyance device 6 having paper feed rollers 4 and 5 and three pairs of rollers. A presser cover 7 for holding down a document (not shown) is placed on the top of the device 1, and the document is illuminated with light from an exposure lamp 9 of an optical device 8 provided at the top inside the device 1.
The optical image of the original is reflected by the reflecting mirrors 10, 11, 1 of the optical device 8.
2. Photoreceptor 1 via lens 13 and reflecting mirror 14
5. During exposure, the exposure lamp 9 and reflecting mirrors 10, 11, and 12, which are moving optical elements, move from left to right for exposure, as shown by imaginary lines.

After the photoreceptor 15 is charged by the corona discharger 16, an original image from the optical device 8 described above is formed to form an electrostatic latent image. This electrostatic latent image is developed into a toner image by the developing device 17. This toner image is transferred onto the copy paper conveyed by the conveyance device 6 by the action of the corona discharger 18. The copy paper on which the toner image has been transferred is removed by a static eliminator 19.
It is peeled off from the photoreceptor 15 by the action of
1 and the pressure roller 22 , thermal fixing is performed, and then the sheet is discharged onto the tray 24 by the discharge roller 23 .

A power supply section 27 of a processing circuit 26 (see FIG. 2) for controlling the copying operation is installed on a partition plate 25, which is a second partition plate disposed above the heat roller 21. This power supply section 27 is located almost directly below the rest position of the optical device 8. A partition plate 28 is provided above the power supply section 27, and this partition plate 28
A through hole 29, which is a first through hole, is formed in. This through hole 29 has a size corresponding to the power supply section 27. Further, another partition plate 30 that is perpendicular to the partition plate 28 is also formed with a similar second through hole 31 . These partition plates 28,
30 constitutes a first partition plate. The through hole 29 opens facing the upper space in the machine body 1 where the optical device 8 is provided, and the through hole 31 opens toward the lower space in the machine body 1 where the photoreceptor 15 and paper feed cassettes 2 and 3 are provided. It is open and open. As will be described later, the air heated by the heat from the power supply section 27 is applied to the reflecting mirrors 10, 11, 12 and the photoreceptor 15 of the optical device 8 through the through holes 29, 31.
Therefore, the reflecting mirrors 10, 11, 12 and the photoreceptor 1
5 condensation is prevented.

FIG. 2 is a block diagram showing the electrical configuration of a copying machine according to the present invention. Commercial AC power is supplied to the power supply section 27 via the outlet 33. In this power supply section 27, AC power is converted to DC power and transformed to, for example, 24V. DC power from the power supply section 27 is provided to the processing circuit 26. Further, the DC power from this power supply section 27 is supplied to the processing circuit 26.
In addition, they are also used to operate, for example, solenoids, light emitting diodes as display elements, direct current motors, and electromagnetic clutches. The DC power from the power supply section 27 is also given to the battery 34 to charge the battery 34. It is also given to the memory 35 at the same time. The battery 34 can operate the memory 35 using the charged power when the power is stopped, for example, when the outlet 33 is unplugged.

The processing circuit 26 includes an operation switch 3 for turning on the power.
6 is connected. When the power-on operation switch 36 is turned on, the processing circuit 26 drives the main relay 37 to supply AC power from the outlet 33 to the load 38. This energizes the load 38 such as the drive motor, fan motor, heat fixing device, and the like.

When no copying operation is being performed, the operation switch 36 is in an OFF state, and the load 38 is in a stopped state. Since this power supply section 27 is provided at a corner of the aircraft body 1, its installation becomes easy.
Note that at this time, the outlet 33 is connected to the power source, and therefore, power is always supplied to activate the processing circuit 26 via the power source section 27. Therefore, heat loss is generated in the power supply unit 27 even when the copying operation is stopped, and this heat loss warms the surrounding air and causes convection to flow through the through holes 29 and 31 to the optical device 8. Reflector 1
0, 11, 12 and photoreceptor 15.
The reflecting mirrors 10, 1 thus located in the rest position
1, 12 and the photoreceptor 15 are warmed to prevent dew condensation. Furthermore, the copy paper in the paper feed cassettes 2 and 3 is also warmed by the warmed air flowing in through the through hole 31. This prevents the copy paper from becoming damp. By preventing the copy paper from getting damp in this way, the copy paper is smoothly peeled off sheet by sheet during feeding. Further, even when the copy paper is peeled off from the photoreceptor 15 by the static eliminator 19, the peeling operation is performed smoothly and reliably.

Therefore, when a copying operation is performed, the copy paper is reliably copied.

In this way, in this embodiment, the heat from the power supply unit 27 is used to prevent dew condensation on the optical device 8 and the photoreceptor 15, so there is no need to use a separate heater as in the conventional case. As a result, the number of parts can be reduced and the configuration can be simplified.

In this embodiment, the power source section 27 is provided on the partition plate 25, but it may be provided on the inner surface of the side wall of the fuselage 1, for example.

Although the power supply section 27 was provided below the optical device 8 in the above-described embodiment, it may be provided near the photoreceptor 15 in order to suitably prevent dew condensation on the photoreceptor 15.

Alternatively, it may be provided near the paper feed cassettes 2 and 3. In this way, the moisture-proof function of the copy paper in the paper feed cassettes 2 and 3 is further improved.

Further, the lens 13 and the photoreceptor 15 may be heated by separate heaters, separate from the power supply section 27. Even in this case, compared to the conventional case where three individual heaters are provided, dew condensation can be prevented with two heaters, and the number of parts can be reduced.

As described above, according to the present invention, the power supply section of the processing circuit is provided near the optical device, the photoreceptor, or the paper feed cassette, thereby reducing heat loss that occurs when converting AC power of the power supply section into DC power. Since it is configured to heat the photoreceptor, optical device, and paper feed cassette, there is no need to install separate heaters as in the past, which simplifies the structure and reduces costs. It becomes possible to achieve this goal.

It also prevents the copy paper in the paper feed cassette from becoming damp. Therefore, each sheet of copy paper is smoothly peeled off and fed when paper is fed, and even when the copy paper is peeled off from the photoreceptor by the static eliminator, the peeling operation is ensured smoothly and reliably. It is done.

In particular, according to the present invention, the power source section 27 is disposed almost directly under the plurality of moving optical elements 9, 10, 11, 12 at the rest position, so that the heat generated from the power source section 27 It is possible to prevent dew condensation by warming the plurality of moving optical elements 9, 10, 11, 12 at the position. Also, the power supply section 27
Since it is configured to constantly supply power to the rechargeable battery 34, it is not necessary to consume power only for heat insulation, and wasteful power consumption is prevented, thereby improving economic efficiency. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a simplified vertical sectional view of one embodiment of the present invention, and FIG. 2 is a block diagram showing a simplified electrical configuration of a copying machine according to the present invention. 1... Airframe, 2, 3... Paper feed cassette, 10,
11, 12...reflector, 13...lens, 15...
...Photoreceptor, 26...Processing circuit, 27...Power supply section.

Claims (1)

[Claims for Utility Model Registration] (1) A processing circuit 26 that controls copying operations and a memory 3 that stores information from the processing circuit 26
5, and a rechargeable battery 3 for powering the memory 35.
4, and a power supply unit 27 for constantly energizing the processing circuit 26, memory 35, and battery 34.
The plurality of moving optical elements 9, 10, 11, and 12 move and irradiate light onto the original placed on the upper part of the body 1 of the copying machine from the rest position, and guide the light to the photoreceptor 15 for exposure. An electrostatic copying machine comprising: an optical device 8, wherein the power source section 27 is disposed almost directly below the plurality of moving optical elements 9, 10, 11, and 12 in a rest position. (2) The power supply unit 27 is partitioned from the optical device 8 by first partition plates 28 and 30, and is located at a rest position on a second partition plate 25 provided below the first partition plates 28 and 30. 2. The electrostatic copying machine according to claim 1, wherein the electrostatic copying machine is supported almost directly below the plurality of moving optical elements 9, 10, 11, 12 of the optical device 8. (3) The first partition plates 28 and 30 have a first through hole 29 that opens facing the upper space inside the body 1 where the optical device 8 is installed, and a first through hole 29 that opens facing the upper space inside the body 1 where the optical device 8 is installed and at least a hole inside the body 1 where the photoreceptor 15 is installed. 3. The electrostatic copying machine according to claim 2, wherein a second through hole 31 is formed facing the lower space of the electrostatic copying machine.