JPH0293551A - Pressure molding door of electrophotographic device - Google Patents

Abstract

PURPOSE:To obtain the door which has high torsional rigidity and is excellent in cost, design and operability by pressure-molding a synthetic resin and providing the parts which function when the door is combined with a device body at >=1 points to the rear surface of the door by integral molding with the door. CONSTITUTION:The door body 1 and the function parts such as pocket 2, reinforcing rib 3, projection 4 for foolproof, handle for opening and closing the door, and projecting part 37 for pushing of a development container which function when combined with the main device are molded by pressure-molding using the synthetic resin. The parts of the large size with which the high accuracy is not obtainable by injection are formed with the high torsional rigidity and the door which is excellent in the cost, the design including the design of the rear surface and the operability is obtd.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement of the front door of a console-type electrophotographic apparatus, such as a copying machine or a printer.

[Prior Art] As shown in FIG. 8, the front door of a conventional copying machine has a basic plate-like body formed by pressing sheet metal and has reinforced stays 26,
Fool-proof protrusion 24 of the jam release lever in the copying machine, door latch member, molded member 22 of the handle, metal chain 36 for grounding, vibration isolating member 23 for suppressing resonance of the sheet metal door. There are some with 25 etc. attached. Furthermore, in the case of small-sized copying machines, injection molding was used as shown in FIG.

[Problems to be Solved by the Invention] However, the above-mentioned gold door described in FIGS. 8 and 9 had the following drawbacks.

1. Since the door is thin and has a large area, its torsional rigidity is weakened.To solve this problem, we have to install many reinforcing members 18, 19, 26 etc. by welding (the part marked with an X in the figure), or increase the thickness of the plate. As a result, the costs increased and the duplexes became heavier as well.

2. Doors made of sheet metal tend to resonate in the audible range and have low soundproofing effects, so vibration-proofing rubber 23.25 must be used to reduce resonance, which requires a lot of manufacturing time and increases costs. Ta.

3. For folding sheets made of sheet metal, the handles 21 and 22 for opening and closing the door and the protrusion 24 for the purpose of a tool loop for the jam release lever inside the main body must be constructed from a separate member from the door.
The assembly structure becomes complicated, which increases the cost.

4. Doors made of sheet metal have a small degree of freedom in rounding the corners (corners) 27. 28, and if the processing is forced to round, welding and grinding will be required, which will ultimately limit the design or reduce costs. I had no choice but to lift it up and force it into the desired shape.

5. For doors made of sheet metal, if the sheet metal edges 37, 38, etc. are left as is, there is a risk of injury to the user, and the edges will need to be pressed, such as by rolling or folding them into a bag shape. There were disadvantages such as sometimes having to perform deburring work.

6. Even if the front surface had a clean shape, the back side of the door had extremely little freedom in design, and many design defects remained. We had no choice but to give up on uneven coating, especially when there were parts to be welded.

Next, an injection molded door used for a door having a relatively small area as shown in FIG. 9 will be described.

1. Due to the nature of injection mode doors, it is not possible to increase the wall thickness, and it is extremely difficult to increase torsional rigidity even with reinforcing materials, making it difficult to apply to large aircraft doors. .

2. When the injection door becomes large, its flatness deteriorates, a plurality of latch members 33 and 34 are required, and it is easily deformed, resulting in poor function and operability as a door.

3. With injection doors, the degree of freedom in setting the back side of the door is greater than with sheet metal doors, but due to its nature, it is not possible to freely adjust the wall thickness, and in some cases, two injection doors, 30 and 31, respectively, are made. , were combined into one door. This has the drawback of increasing costs because an assembly process is required.

The present invention aims to overcome the above-mentioned drawbacks and provide a solution in terms of strength.

[Means for Solving the Problems] The door for electrophotographic equipment of the present invention which solves the above-mentioned drawbacks is made of synthetic resin and has the trade names rE, B, M,
The functional parts when combined with the main unit are integrally molded.

As a result, it is possible to make large shapes that are not possible with injection molding while maintaining high torsional rigidity, and it is possible to have the same degree of design freedom as injection molding for both the front and back surfaces.Furthermore, it has high soundproofing properties and is lighter than sheet metal. Functional parts used for functions other than the door, such as , foolproof, and handles, can also be made by integral molding, making it possible to create an unprecedented electrophotographic door with ``cost, design including the back side, and operability.''

[Example] Figures 1 to 7 are drawings for explaining the present invention in detail, and Figure 1 is a perspective view showing the back side of the door for copying materials of the present invention.
2 is a perspective view of the door seen from the direction of arrow A in FIG. 1, and FIG. 3 is a sectional view taken along line BB in FIG. 2. The next FIG. 4 is a front view of the protrusion 4 for explaining the function of the protrusion 4, and FIG. 5 is a sectional view taken along the line C--C in FIG. 1. Furthermore,
Figure 6 is a longitudinal cross-sectional view of another example in which the door pocket is used to store the toner case of the cleaner. Figure 7 shows another effect obtained when pressure forming is performed, with two layers of hollow molding. FIG. 2 is a cross-sectional view of a door showing an example in which the hollow inside is filled with a metal filler to achieve a radio noise prevention effect.

A more detailed explanation will be given below with reference to the drawings.

In Figure 1, 1 is the door body, 2 is a pocket for storing the instruction manual 9 of the main unit, and is made by air pressure molding (blow molding).
It is integrally installed on the back side. 3 is a reinforcing rib that is also provided on the back side and is attached to the meat on the front side as shown in Figure 5, making it stronger. 4 is 5i! when the jam removal lever 10 of the main body shown in FIG. 4 is not set at the predetermined position. This is a foolproof protrusion that prevents the door from being closed, and is made by inflating a part of the wall that forms the door. Reference numeral 5 indicates a hole for a door hinge when attaching the door to the main body, and depending on the case, a bushing may be press-fitted (not shown) to improve the strength. Next, 6 is a door switch push member that detects the closed state of the door, 7 is a door catch member, and 8 in Figure 2 is a handle that opens and closes the door, which is integrally provided using the air pressure molded front side. An example is shown in FIG. 3, a cross-sectional view, and FIG. 10, a front view. Note that the shape of the recess is oblique as shown at 38.39 in FIG. 10 so that pressure forming can be performed. Furthermore,
In FIG. 3, reference numeral 11 denotes a developing device that can be taken in and out of the main body of the copying machine, and when the door is closed, the developing device is always pushed into a predetermined position by the protrusion 37 of the door.

FIG. 6 is a sectional view showing another applied example, in which a discharge toner case 13 is provided on the screen to store the toner removed by a cleaning device from the surface of the electrophotographic photoreceptor after the transfer process. 13 is provided integrally on the back side of the folding screen 1. In the figure 1
4 is a part of the cleaning device, and 15 is a sealing member made of a sponge provided on the cleaning device side to prevent toner from scattering.

Figure 8 is a cross-sectional view of the case where the radio noise prevention material 16 is provided inside the compressed air formation. It can be used without worrying about the gender mold.

Note that when a blow-molded shoulder made of polypropylene, polyethylene, or the like is used for a door for a large electrophotographic device, the accuracy of torsional rigidity and flatness is not sufficient. Also, from the standpoint of fire safety, polyethylene may not be preferable for copying materials using a heat fixing device.

Preferred examples of the synthetic resin in the present invention include polycarbonate, polyphenylene oxide, acrylonitrile-butadiene-styrene CABC) resin, and the like. In addition, the size suitable for the molded door of the present invention is 0.05
It is effective for doors having a thickness of about 10 mm to 30 mm with m' to In2.

[Effects of the Invention] As mentioned above, by using the present invention in the door of an electrophotographic device such as an electronic copying device, the drawbacks of conventional sheet metal doors and injection molded doors can be solved, and at the same time, unique features can be achieved by combining it with the main device. You can also expect the following benefits.

1. Since the basic strength is twice as much as that of injection, there is no fear of fire against the body with a heat source such as a close-contact device or a light source lamp.It is safe and extremely advantageous, and has higher fire resistance than injection. It is possible to

2. Since the door is hollow, functional parts of the main device can be provided in the hollow part of the door. For example, it can be used as a waste toner storage case, an instruction manual, a wall for the air flow path, or a radio noise shielding material made of conductive colored material.

3. Since it is hollow, it has better insulation against mechanical noise inside the main body, and has a high soundproofing effect.

4. Since the internal parts of the main body, especially the fool-proof protrusions such as the jam removal lever, can be made integrally with the folding screen, it is also possible to achieve both cost and design at a level that cannot be achieved with conventional doors. .

[Brief explanation of drawings]

1 and 2 are perspective views showing embodiments of the present invention, FIG. 3 is a sectional view taken along line BB in FIG. 2, and FIG. 4 is a front view illustrating the function of the protrusion 4 in FIG. Figure 5 is a sectional view taken along line C-C in Figure 1;
6 and 7 are sectional views showing other embodiments, FIGS. 8 and 9 are perspective views showing a conventional example, and FIG. 10 is a front view of the handle shown in FIG. 2. In the figure, 1 is a pressure-formed door, 2 is a pocket for an instruction manual, 3 is a reinforcing rib, 4 is a foolproof protrusion, and 8
Reference numeral 37 indicates a concave portion for the handle, and a convex portion for pushing the developing device.

Claims (1)

[Claims] (1) The main body door of an electrophotographic device, which is made by pressure molding of synthetic resin, and has at least one part on the back side of the door that functions when combined with the main body of the device, which is integrally molded with the door. Features a pressure-formed door for electrophotographic equipment.