JPH0410599Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an image forming apparatus such as a copying machine or a printer.

[Prior art and problems]

Conventionally, the upper body of an image forming apparatus is rotated around a horizontal axis to open the upper body and the lower body.
Types that can be repaired are known.

In this type of image forming apparatus, the so-called shell open type, a biasing force is generally applied to the upper body in the opening direction so that the operator can easily open the upper body. ing.

In addition, the upper body has a large number of parts attached to it, making it heavy, and a correspondingly strong biasing force is required.

Therefore, conventional image forming apparatuses are required to have a frame structure with high rigidity so as not to be deformed even by strong urging force, and have the disadvantage that the weight of the members is increased.

Furthermore, when wiring to electrical components disposed in the upper body, it is necessary to pass the wiring through the horizontal shaft side that serves as the fulcrum for opening and closing, making it difficult to implement the wiring.

[Purpose of invention]

In view of the above-mentioned drawbacks of the conventional image forming apparatus, it is an object of the present invention to provide an image forming apparatus that reduces the weight of the upper body, simplifies the structural members of the apparatus, and facilitates wiring to each electrical component.

[Key points of the idea]

In order to achieve the above object, the present invention provides an image forming apparatus comprising a lower body and an upper body, and which can be opened from the lower body by rotating the upper body around a horizontal axis. A frame and a second frame are integrally provided, and an erected portion of the first frame is provided with a shaft hole through which the rotating member and the horizontal shaft are inserted, and the erected width of the first frame is larger than the erected width of the first frame. A second frame having a wide width provides an electrical component in the space formed at the bottom of the lower body, and a power supply system for supplying commercial power, a power switch, and electrical components to which commercial power is supplied are installed in the lower body. It is characterized by having been provided.

[Example of idea]

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an overall perspective view showing an example of an image forming apparatus according to the present invention. In the figure, the image forming apparatus is composed of an upper body 1 and a lower body 2, which can be opened and closed about a horizontal axis 3.

Further, the upper body 1 is provided with an operation section 4 for performing operations necessary for image formation, and a side door 5 necessary for taking in and out an image forming unit, which will be described later.

On the front side of the lower body 2, there are a paper ejection port 6 for ejecting paper on which recorded images have been formed, a tray 7 for stacking the ejected paper, and a cassette for inserting a box-shaped cassette containing a large number of stacked papers. A power supply opening 8 and a power switch 9 for turning on the power to the device are provided, and a power cord 10, which is a power supply system, extends from the lower side of the device main body.

FIG. 2 is a perspective view of essential parts showing the frame structure used in the present invention. The frame consists of a first frame 11 and a second frame 12, both of which are integrally fixed by spot welding or the like.

The upright portions 11a and 11b of the first frame 11 are provided with a shaft hole 15 through which the horizontal shaft 3 for opening and closing the upper body is inserted, and a hole 16d into which a paper feed roller 30 (to be described later) is pivotally supported. 16e is bored. Further, holes 16a to 16c in which other rotating members are pivotally supported are bored in the upright portion 11a.
Chains, sprockets, gears, solenoids, clutches, etc. for driving the rotating members are arranged at intervals of l3.

A space 13 formed by a portion of the first frame 11 and the second frame 12 is configured to accommodate a cassette.

The left and right width l2 of the second frame 12 is wider than the left and right width l1 of the first frame 11, and is approximately equal to the exterior dimension. This second frame 12 forms a space 14 at the bottom of the image forming apparatus.
is provided with an electrical component (not shown) that can be pulled out. Space 14 with a width that is just as wide as the exterior dimensions
Since electrical components can be placed on the board, a large area circuit board can be used. In this embodiment, the electrical equipment section is provided with a heavy power supply circuit, a temperature control circuit board that controls energization of the fixing heater, an interface circuit board that controls signals with external devices, and the like.

FIG. 3 is an overall configuration diagram showing an example of the image forming apparatus of the present invention. In the figure, the upper body 1 is covered with an upper exterior 21 and the lower body 2 is covered with a lower exterior 22. The image forming apparatus includes a photoreceptor 24, a charger 25 that uniformly charges the photoreceptor disposed around the photoreceptor, an optical recording head 26 that prints according to recorded information, and an electrostatic latent image on the surface of the photoreceptor. A developing device 27 that develops toner, a timing roll 32 that feeds paper according to the image position on the photoreceptor, a paper feed roller 30 that takes out paper one by one from a cassette,
A reversing guide 31, a transfer device 28 that transfers the toner image on the photoreceptor 24 onto paper, a cleaner 29 that removes untransferred toner on the photoreceptor, a main motor 39 that drives the photoreceptor 24 and other rotating members, and paper. 3
A cassette 34 in which a large number of sheets 3 are stacked, an upper paper discharge roll 35a provided on the upper machine body, a lower paper discharge roll 35b provided on the lower machine body, a heating roll 36 equipped with a fixing heater 40 inside, and the paper is transferred to the heating roll 36. It is composed of a pressure roll 37 and the like that are brought into pressure contact.

Here, a photoreceptor 2 provided in the upper body 1
4. The charger 25, the developer 27, the cleaner 29, etc. can be taken in and out of the image forming unit through the side door 5 shown in FIG.

The electrical equipment section 23 is provided in the space 14 described above. In the same figure, parts above the broken line are attached to upper fuselage 1, and parts below are attached to lower fuselage 2.
It is located in In other words, the power supply system, such as the power cord 10, the power switch 9, the main motor 39 that operates at 100 VAC, the fusing heater 40 that is energized with 100 VAC, and the temperature control circuit that controls the power supply to the fusing heater 40, are all located in the lower body. It is set up.

All parts that require AC power are located in the lower fuselage 2.
Since the AC power supply wiring to the upper fuselage 1 is not required, wiring can be simplified.
This is also advantageous in terms of safety and noise countermeasures.

Furthermore, since the heavy power supply circuit and main motor are disposed in the lower body, the upper body 1 can be made lighter.

In the image forming apparatus configured as described above, when the upper body 1 is rotated about the horizontal axis, the upper body above the broken line is opened. Since the entire upper body is lighter, it is easier to open and close, and there is no need to increase the rigidity of the frame itself.

Note that although the above embodiments have been described with respect to a printer, the present invention is not limited thereto, and similar effects can be obtained even with a copying machine or the like.

[Effect of idea]

As explained in detail above, according to the image forming apparatus of the present invention, all parts related to the AC power supply, such as the power supply system, power switch, electrical equipment, main motor, and fixing heater, are located in the lower body. It is easy to work with, and the upper body can be used in common even if the products are for countries with different power specifications (voltage, frequency, etc.), reducing production costs.

Furthermore, since the electrical components including the power supply circuit, the main motor, etc. are provided in the lower body, heavy parts are concentrated in the lower part, making the upper body lighter.

Therefore, the urging force to be applied to the upper body may be weak, and the rigidity of the frame may also be low.

Since the power supply circuit can be provided in the space formed by the frame 2, which has a width larger than the width of the frame 1, a circuit board with a large area can be used, and the amount of connection wiring between circuit boards can be reduced. .

[Brief explanation of drawings]

FIG. 1 is an overall perspective view showing an example of an image forming apparatus of the present invention, FIG. 2 is a perspective view of essential parts showing a frame structure of the present invention, and FIG. 3 is an example of an image forming apparatus of the present invention. FIG. 1...Upper body, 2...Lower body, 3...Horizontal axis, 4...Operation unit, 5...Side door, 6...Paper output slot, 7...Tray, 8...Cassette opening, 9 …
...Power switch, 10...Power cord, 11...
First frame, 11a, 11b... standing portion, 12
... Second frame, 13 ... Space, 14 ... Space, 15 ... Shaft hole, 16a to 16e ... Hole, 21
...Upper exterior, 22...Lower exterior, 23...Electrical unit, 24...Photoreceptor, 25...Charger, 26...
Optical recording head, 27...Developer, 28...Transfer device, 29...Cleaner, 30...Paper feed roller, 31
... Reversal guide, 32 ... Timing roll, 3
3... Paper, 34... Cassette, 35a... Upper paper discharge roll, 35b... Lower paper discharge roll, 36... Heat roll, 37... Pressure roll, 39... Main motor, 40... Fixing heater.

Claims (1)

[Claims for Utility Model Registration] An image forming apparatus comprising a lower body and an upper body, which can be opened from the lower body by rotating the upper body around a horizontal axis, comprising: a first frame in the lower body; A second frame is integrally provided, and an erected portion of the first frame is provided with a shaft hole through which the rotating member and the horizontal shaft are inserted, and has a width wider than the erected width of the first frame. An electrical equipment section is provided in the space formed at the lowest part of the lower fuselage by a second frame having a second frame, and a power supply system for supplying commercial power, a power switch, and electrical components to which commercial power is supplied are provided in the lower fuselage. An image forming apparatus characterized by: