JPH0248896B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a copying machine with an improved power supply structure for a charger.

In recent years, in order to facilitate handling of paper jams, copying machines have been developed in which the entire copying machine is divided by a paper transport path and can be opened and closed, as shown in FIG. 1, for example.

By the way, the transfer direct current corona charger 2 for the purpose of transferring an image from the photoconductor 1 to the transfer paper and the peeling alternating current corona charger 3 for the purpose of peeling off the transfer paper from the photoconductor 1 are connected to the photoconductor 1 and the transfer paper. It is located on the opposite side.

Therefore, in this type of copying machine, the chargers 2 and 3 for peeling and transfer belong to separate units from the AC corona charger 4 for static elimination and the DC corona charger 5 for charging.

Therefore, the wiring 6, which connects the chargers 4, 5 for static elimination and charging, and the high voltage transformer 9,
In order to prevent damage, it is necessary to pass the opening/closing fulcrum part 8 through the opening/closing fulcrum part 7, which has the disadvantage of increasing its length, causing current loss, increasing cost, and making wiring work troublesome.

The present invention has been made focusing on the above circumstances,
The object is to provide a copying machine in which the charging section can be energized without requiring long electrical wiring.

Hereinafter, one embodiment of the present invention will be described based on FIGS. 2 to 5. In the figure, 11 is the main body of the copying machine, and this main body 11 is composed of upper and lower housings 12 and 13 as first and second units. The upper casing 12 is rotated about the fulcrum 14 when the transfer paper gets jammed during copying, and is separated from the lower casing 13 from the part shown by the dashed line (transfer path for the transfer paper). It's summery. Further, a photoreceptor 15 as an image carrier is provided on the upper side of the main body 11, and an AC corona charger 1 for static elimination is provided around the upper side of the photoreceptor 15.
6, a DC corona charger 17 for charging, a focusing light transmission member 39, etc. are provided, and a DC corona charger 18 for transfer and an AC corona charger 19 for peeling as a charging section are provided on the lower side. Further, a paper feed cassette 20 is provided on one side of the lower part of the main body 11, and this paper feed cassette 20
The transfer paper inside is taken out by a paper feed roller 21, and then transferred to the photoreceptor 1 by feed rollers 22, 22.
5 and an AC charger 18 for transfer. Further, the transfer paper on which the original has been transferred by the photoreceptor 15 is conveyed to the fixing devices 24, 24 by the conveyance belt 23, and then transferred to the paper ejection roller 2.
5 and 25, the paper is ejected to a paper ejection tray 26.

On the other hand, the corona chargers 18 and 19 for transfer and peeling are constructed as shown in FIG. That is, numeral 27 denotes a charge case having a U-shaped cross section. A charge wire 28 is provided inside the case 27, and the charge wire 28 is connected to a terminal 29.
An upright portion 30 serving as an electrical contact member is fixed to the terminal 29 with screws. The upright direction of the upright section 30 is inclined so that it can be easily connected to a power supply section 34, which will be described later.

In addition, each charger 1 for static elimination and charging mentioned above is
A high-voltage transformer 32 as a power source is connected to 6 and 17 via wiring 31 and 31, and power feeding parts 34 and 34 are further connected to this high-voltage transformer 32 via wiring 33 and 33. The power supply section 3
4 and 34 are constructed as shown in FIG.
That is, 35 is a case formed in a box shape, and a mounting portion 36 is provided within this case 35 in a protruding manner.
An end portion 33a of the wiring 33 and a conductive blade 37 for power supply serving as an elastic member connected to the end portion 33a are fixed to the mounting portion 36 by screws 38.

Therefore, when the upper and lower housings 12 and 13 are connected, the upright portions 30 of the terminals 29 of the chargers 18 and 19 for transfer and peeling are placed in the case 35 of the power supply portions 34 and 34 as shown in FIG. It is inserted into the case 35 and the conductive blade 37 is pushed up from the position shown by the broken line to the position shown by the solid line, and the elasticity of the conductive blade 37 presses the conductive blade 37 so that the conductive blade 37 can be moved toward and away from the position. As a result, the power supply units 34, 34 and the chargers 18, 19 for transfer and peeling are electrically connected to each other.

As mentioned above, the upright portion 30 of the terminal 29
By connecting the conductive blade 37 and the conductive blade 37 in a detachable manner, conduction is established, unlike the conventional method in which the wire is fixedly connected to the charger, the upper and lower casings 1 can be connected to each other without using long wires.
Division into 2 and 13 becomes possible. In addition, the photoreceptor 11
Even if the transfer paper gets stuck between the transfer charger 18 and the transfer charger 18, the wiring does not get in the way and the transfer paper can be easily removed.

As explained above, the present invention is constituted by first and second units that can open and close the main body of the copying machine,
A charging section and a power supply for applying a voltage to the charging section are distributed in the first and second units, respectively, and a power supply section is provided for supplying the voltage from the power supply to the charging section, and this Since the power feeding section intermittents the power supply to the charging section according to the opening/closing operations of the first and second units, the electric wiring connected to the charging section can be made longer as in the conventional case. Therefore, current loss can be reduced, the cost can be reduced, and wiring work can be made easier.

Further, the first unit supports the image carrier,
Since the second unit supports the transfer charging means, even if the transfer paper becomes jammed between the image bearing member and the transfer charging means, the wiring does not get in the way, making it easy to remove the transfer paper. The transfer paper can be safely removed by cutting off and on the power supply section to the charging section.

[Brief explanation of the drawing]

FIG. 1 is a schematic block diagram showing a conventional copying machine, FIGS. 2 to 5 show an embodiment of the present invention, FIG. 2 is a schematic block diagram showing a copying machine, and FIG. 4 is a perspective view showing the charger, FIG. 4 is a perspective view showing the power supply section, and FIG. 5 is a longitudinal sectional view showing the main parts. 11... Copying machine main body, 12... Upper housing, 13... Lower housing, 16, 17, 18, 19... Charger,
34, 34...Power supply part, 30, 37... Electric contact member.

Claims (1)

[Scope of Claims] 1. A device that forms an image on an image carrier and electrostatically transfers the formed image to a transferred object, the main body of which can be opened and closed in the transferred object conveyance path. consisting of a first and a second unit;
The second unit supports the image carrier, and the second unit includes a transfer charging means for electrostatically transferring the image formed on the image carrier supported by the first unit onto the transfer target. The first unit is provided with a power supply for applying a voltage to the transfer charging means, and a power supply means is provided for electrically connecting the power supply and the transfer charging means. . A copying machine characterized in that the power feeding means moves toward and away from the transfer charging means by opening and closing operations of the first and second units. 2. The copy set forth in claim 1, wherein the power feeding means has an elastic member at a connection portion with the transfer charging means, and the power feeding means and the transfer charging means are in elastic contact with each other. Machine.