JPS63253371A - Copying machine - Google Patents

Abstract

PURPOSE:To omit the waiting for the rise of the luminous energy of fluorescent light in copying operation by separately providing a fluorescent light switch and a main switch and previously lighting the fluorescent light. CONSTITUTION:The main switch 18 and the fluorescent light switch are separately given, and the latter 25 can turn on the fluorescent light 19 alone. The fluorescent light switch 25 is composed of two contacts 26 and 27. First, when the switch 25 is pressed, both the contacts 26 and 27 are closed to heat the filaments of the fluorescent light 19, which lead to discharge. Turning the switch 25 off when the light 19 is ready to light, the contact 27 is opened, while keeping the contact 26 on. The action of a stabilizer 21 turns on the light 19. In case of turning off the light 19, the switch 25 is again pressed to open the contact 26. Then a power source is cut off to turn off the light. Thus an operator can turn on the fluorescent light prior to copying operation. When a room temperature is low, for instance, an exposure light source is previously turned on; therefore the operator need not wait for the rise of its luminous energy.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application J] The present invention relates to a copying apparatus that uses a cold light source such as a fluorescent lamp or a cold cathode tube as an exposure light source.

[Prior Art] Conventionally, this type of device is provided with one switch for power supply (hereinafter referred to as the main switch), and when this main switch is turned on, power is supplied to the fixing heater, exposure light source, control unit, etc. The configuration was as supplied.

In particular, when the light source is a cold light source such as a fluorescent lamp, it takes time for the light intensity to rise, so it is necessary to turn on the main switch and turn on the fluorescent lamp in advance, or use a high-frequency lighting circuit to copy. When operating the start key,
Methods such as suddenly increasing the light intensity of fluorescent lights were used.

FIG. 4 shows an example in which the main switch is turned on and the fluorescent lamp is turned on in advance. When the main switch 18 is turned on, power is supplied to the unit 20 of the apparatus. At the same time, the circuit configuration is such that the fluorescent lamp 19 is turned on by the ballast 21 and the glow bulb 22.

FIG. 5 is an example of increasing the amount of light from a fluorescent lamp using a high-frequency lighting circuit. When the main switch 18 is turned on, power is supplied to the unit 20 of the apparatus. Next, when the copy start key is turned on, the control circuit within the unit 20 outputs a fluorescent lamp lighting command to the high frequency lighting circuit 23. This command turns on the fluorescent lamp 19.

In this case, since it is necessary to rapidly increase the light intensity of the fluorescent lamp 19, the high frequency lighting circuit 23 first applies a high frequency output to the fluorescent lamp 19. The amount of light from the fluorescent lamp 19 is detected by the optical sensor 24, and when the amount of light reaches a specified amount, the output is controlled to return to the normal frequency output. Further, the light amount is stabilized during the copying operation by detecting the light amount using the optical sensor 24.

[Problems to be Solved by the Invention] However, if a method is used in which the fluorescent lamp is turned on in advance, if the rise time of the fixing heater is short, it is necessary to wait until the light intensity of the fluorescent lamp rises. Furthermore, since the fluorescent lamp remains on for as long as the main switch is on, the life of the fluorescent lamp is short.

Furthermore, if a method of lighting a fluorescent lamp using a high-frequency lighting circuit is used, the high-frequency lighting circuit and a means for detecting the amount of light are required, resulting in high costs and problems such as excess heat generated in the lighting circuit. there were.

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and to provide a low-cost copying apparatus with a long fluorescent lamp life.

[Means for Solving the Problems] In order to achieve the above object, the copying apparatus of the present invention includes a first switch means for supplying commercial power to the lighting circuit of the exposure light source, and a control element other than the exposure light source. and second switch means for supplying commercial power.

[Function] In the copying apparatus of the present invention, the fluorescent lamp lighting switch and the main switch are separated, so that the operator can turn on the fluorescent lamp before copying. Therefore, for example, when the room temperature is low, by turning on the fluorescent lamp in advance, it is no longer necessary to wait for the light intensity of the fluorescent lamp to rise during copying.

[Example] The present invention will be described in detail below with reference to the drawings.

FIG. 3 is a diagram showing the configuration of a copying apparatus according to the present invention. First, the operator turns on the fluorescent lamp of the lighting unit 4 using a fluorescent lamp switch, which will be described later. Next, a switch (referred to as a main switch) for supplying power to the copying apparatus 1 is turned on. When the main switch is turned on, a fixing heater (not shown) of the fixing device 12 is turned on, and temperature control is performed so that the fixing heater has an appropriate temperature. The display on the display (not shown) shows "wait" until the fixing temperature becomes appropriate, and changes to "ready" when the temperature reaches the appropriate temperature.

Next, the operator sets the original on the original table glass 13 and closes the original holding plate 14. Then, by pressing the copy start key, the copying operation is started. The photosensitive drum 2 is charged by the charger 3, and the document table glass 13 and the document presser plate 14 move in the direction of the arrow. Along with that,
The original image illuminated by the illumination unit 4 is focused on the photosensitive drum 2 by the SELFOC lens 5 to form a light image.

Note that the shutter 17 is configured to prevent the document irradiation light from the illumination unit 4 from being applied to the photoreceptor drum 2 at any time other than during the copying operation.
This is to prevent light from entering the room. The structure is such that the light shielding is released during the copying operation.

The optical image formed on the photosensitive drum 2 is developed by a developing device 6 into a toner image. Copy paper is in paper feed tray 15
The paper is fed by the paper feed roller 9 from the paper feed roller 9 . When the leading edge of the copy paper reaches the registration roller 1O and forms a loop, the paper feed roller 9 is temporarily stopped.

Then, in order to align the leading edge of the toner image and the copy paper,
The registration rollers 10 are driven, and then the toner image formed on the photosensitive drum 2 is transferred onto copy paper by the transfer device 7.

After being transferred, the copy paper is conveyed to a fixing device 12 by a conveyor belt 11. The copy sheet fixed by the fixing device 12 is discharged to the paper discharge tray 16, and the copying operation is completed.

Note that a small amount of toner left on the photoreceptor drum 2 is cleaned by a cleaner 8.

Next, the fluorescent lamp lighting circuit will be explained.

FIG. 1 shows an example of a fluorescent lamp lighting circuit according to the present invention. The main switch 18 and the fluorescent lamp lighting switch are provided separately, and only the fluorescent lamp 19 can be turned on by the fluorescent lamp lighting switch 25. The fluorescent lamp lighting switch 25 is composed of two contacts 26 and 27.

Initially, when switch 25 is pressed, both contacts 26, 27 close and the filament of fluorescent lamp 19 is heated and begins to discharge. When the switch 25 is released when the fluorescent lamp 19 can be turned on, the contact 26 remains closed and the contact 27 opens, and the fluorescent lamp 19 is turned on by the action of the ballast 21.

To turn off the fluorescent lamp 19, press the switch 25 again. This operation opens the contact 26, turns off the power, and turns off the light. This circuit has a similar structure to the circuit of commonly available commercially available fluorescent lamp stands, and is very inexpensive.

FIG. 2 shows another embodiment of the invention. By using 26 of the contacts 26 and 27 that toggle the fluorescent light switch 25 as the main switch contacts of the copying machine 1, the fluorescent light! If 9 is not lit, copying device 1
The configuration is such that power is not supplied to the When the circuit is configured in this way, the copying operation is not performed when the fluorescent lamp is not lit. Therefore, it is possible to prevent the mistake of creating a completely black copy.

In addition, optical fibers are used to guide the light from fluorescent lamps to the display section.
By displaying whether the fluorescent lights are on or not on the display, the operator can check whether the fluorescent lights are on even if the equipment is configured so that it is difficult to see the lights on. .

Further, the shutter 17 shown in FIG. 3 may be placed below the SELFOC lens 5, or may be placed on the exit side of the illumination unit 4. Furthermore, when the shutter 17 is disposed on the emission side of the illumination unit 4, by configuring the amount of light to be adjusted by the amount of opening of the shutter 17, it can also be used to adjust the copy density.

[Effects of the Invention] As described above, in the present invention, the exposure light source lighting switch and the main switch are provided separately, so that the operator can turn on the fluorescent lamp before copying operations.

Therefore, for example, when the room temperature is low, by turning on the exposure light source in advance, it is no longer necessary to wait for the light intensity of the exposure light source to rise during copying.

Further, since only the fluorescent lamp can be turned off when no copying is to be performed, there is an advantage that the life of the fluorescent lamp is extended.

[Brief explanation of drawings]

1 and 2 are circuit configuration diagrams showing an example of the fluorescent lamp lighting circuit of the present invention, FIG. 3 is a diagram illustrating the configuration of a copying machine, and FIGS. 4 and 5 are conventional fluorescent lamp lighting circuits. FIG. 18... Main switch, 19... Fluorescent lamp, 20... Unit other than fluorescent lamp, 21... Ballast, 25... Fluorescent lamp lighting switch, 26, 27... Fluorescent lamp lighting switch contact. lq Fluorescent lamp 2o first ffL) J)'s Uni-futo 21 Chili 25 Fluorescent lamp lighting switch 26 Fluorescent lamp lighting switch 2, 2 27 Fluorescent lamp ￥ T point x T sui... 2 Chi Ling The circuit 4 of the present invention's fluorescent lamp turning circuit 4 Blue and white diagram Fig. 2 1 ↑ Summer photo [i 10 Registration roller 2 Diagram body, drum tt
ml lid belt 3 obi 1v Raku
12 *Guardian Number 4 Teru Bll2 Soto
13 R Mandai Seri Las 5 ℃ Rufot 7 Lens”
14 Tora 1 Korigae 6 Kobizou s
15 Old IT tray 7 transcription! I
/6 Ura 49 tray 5
Creep lγ Shi V゛ Lid q
Fig. 3 Diagram showing the configuration of a roller copying machine by Akira Shiwa 1θ Main switch...) 1,000 liters Fluorescent lamp 20 Fluorescent γD large unit 21 An 11 Raku 22 Glow bulb j A configuration diagram of a conventional fluorescent lamp T-replacement Figure 4

Claims (1)

[Scope of Claims] A first switch means for supplying commercial power to a lighting circuit of the exposure light source; and a second switch means for supplying commercial power to a control element other than the exposure light source.
1. A copying apparatus comprising: switch means.