JPS61110167A - Electrostatic photographic printer - Google Patents

Abstract

PURPOSE:To faciliate the treatment in case of paper jamming and the operation for internal inspection by fitting a frame which holds a development part and a cover which holds a light source part rotatably at both sides of a base where a fixation part is installed. CONSTITUTION:Conveyance members 2-4, a transfer part 5, a fixing roller 6, etc., are fitted to the base 1. Then, the drum frame 13 which holds a photosen sitive body 16 and the development part 14 is fitted at one side of the base 1 rotatably around a pin 12. Then, the cover 20 which holds the light source part 19 is fitted at the other side of the base 1 rotatably opn a pin 21. Namely, when the clamp receiver 32 of the cover 20 and the clamp 10 of the base 1 are disengaged from each other, the cover 20 rotates in its opening direction with the force of a spring 22 and an extension lever 28 drawsand rotates the drum frame 13 in its opening direction associatively with said rotating operation. Therefore, the upper space of the base 1, periphery of the drum frame 13, and principal part of the light source part 19, etc., are opened widely.

Description

[Detailed description of the invention] Industrial applications This invention relates to electrostatographic printers.

Some prior art electrostatographic printers are designed so that the entire device can be separated to open a portion of the interior for maintenance in the event of a paper jam.

Problems to be Solved by the Invention However, since there are some parts that cannot be opened by simply removing the parts, there are many parts to be removed, making it troublesome to inspect and replace parts.

The present invention has been made in view of the above points, and an object of the present invention is to provide an electrostatic photographic printer in which operations such as paper jam disposal, internal inspection, and parts replacement can be easily performed.

Means for Solving the Problems The present invention first includes a frame 13 that holds the photoreceptor 16 and the developing unit 14 on the top of the base 1 that holds the fixing unit 6 and the like.
and a cover 20 are rotatably provided.

Second, a frame 13 is rotatably attached to one side of the base 1 and a cover 20 is attached to the other side.

Third, positioning engagement portions 24 and 25 are formed on the light source portion 19 held by the cover 20 and the frame 13 to engage with each other.

Fourth, a conductive spring 26 is provided between the light source section 19 and the frame 13 and between the frame 13 and the base 1.

Fifth, the frame 13 and the cover 20 are connected by a connecting rod 40.

Sixth, the frame 13 and the cover 20 are connected by the telescopic rod 28 which is biased in the direction of extension.

Operation Therefore, by opening the frame 13 and the cover 20, the transport path of the paper 39, the periphery of the frame 13, the light source section 19, and other main parts can be completely opened without removing any parts.

In addition, the frame 13 is placed on one side of the base 1 and the cover 2 is placed on the other side.
0 is rotatably mounted to widen the open space. In this case, positioning engagement portions 24 and 25 are formed on opposing surfaces of the light source portion 19 and the frame 13 to accurately maintain the position during assembly. Further, when the light source unit 19 and the frame 13 are in an upright state of 1 Mi, the electric charges charged in the light source section 19 and the frame 13 are caused to flow to the base l by the spring 26. Furthermore, cover 20
By connecting the cover 20 and the frame 13 with the continuous rod 40 or the telescopic rod 28, the cover 20 and the frame 13 can be opened and closed with one operation. especially.

By using the telescopic rod 28, the difference in displacement between the cover 20 and the frame 13 can be absorbed.

Example An embodiment of this invention will be described based on the drawings.

The base 1 is provided with conveyance members 2, 3.4, a transfer section 5, a fixing roller 6 as a fixing section, a paper feed roller 7, a cassette case 8, a manual feed slot 9, and a clamp 10. base 1
On one side, a drum frame 13, which is a frame, is connected to pin 1.
It is rotatably attached around 2. The developing section 14 is connected to the drum frame 1 along with the charging section 15 and the photoreceptor 16.
It is held at 3. The drum frame 13 also includes a lamp 17 for erasing the electrostatic latent image formed on the photoreceptor 16 and a cleaning device W for removing toner remaining on the outer periphery of the photoreceptor 16.
L18 is provided.

Further, on the other side of the base 1, a cover 20 that holds a light source section 19 that emits a laser beam is rotatably attached by a pin 2X, and this cover 20 is urged in the opening direction by a spring 22.

Further, this cover 20 is provided with a clamp receiver 23 that engages with the clamp 10. Furthermore, positioning engagement portions 24 and 25 are formed on opposing surfaces of the light source portion 19 and the drum frame 13 to engage with each other. A conductive spring 26 is attached to the drum frame 13 to elastically contact the light source section 19, and a conductive spring 26 to elastically contact the drum frame 13 is attached to the base 1. .

Further, as shown in FIG. 3, a telescopic rod 28 is provided which is biased in the extending direction by a spring 27. This telescopic rod 28 has a long hole 30.3 formed in one link 29.
Insert the pins 33 and 34 that stand up from the other link 32 into the other link 32, fix the stopper @35 to these pins 33 and 34, and attach the spring 27 to the pin 36 that stands up at one end of the link 29 and the pin 33. It has been stretched. Both ends of the telescoping rod 28 are connected to the cover 20 and the drum frame 13 at positions remote from the pins 12.21. The base l is also provided with a stopper 38 that supports a protrusion 37 formed on one side of the drum frame 13.

In such a configuration, in the state shown in FIG. 2, 15 forms a charged layer on the outer periphery of the photoreceptor 16, scans the charged layer with a laser beam from the light source section 19, and forms electrostatic Wi&;
Next, this electrostatic latent image is supplied with toner from the developing section 14 to be developed, and in the process of conveying the paper 39 pulled out from the cassette case 8 by the paper feed roller ruff by the conveying members 3 and 4, the toner image on the photoreceptor 16 is transferred to the transfer section. 5 onto a paper 39, and then fixed by a fixing roller 6.

At this time, the light source section 19, drum frame 13, and spring 2
Since it is grounded to the base 1 through 6, the light source section 19
The charges charged to the drum frame 13 and the drum frame 13 fall to the outside via the base 1.

When the clamp 10 is removed, the cover 20 is rotated in the opening direction as shown in FIG. 1 by the force of the spring 22. In conjunction with this movement, the telescopic rod 28 moves the drum frame 13
, and the drum frame 13 rotates in the opening direction. In this state, the main parts such as the upper space of the base 1, the periphery of the drum frame 13, and the light source section 19 are widely opened, so that operations such as 5 dealing with paper jams, 1 checking, and replacing parts can be carried out very easily.

When the cover 20 is rotated clockwise against the force of the spring 22 from the state shown in FIG. 1, the telescoping rod 28 is contracted.
Since there is a limit to the amount of contraction of the telescopic rod 28, the drum frame 13 rotates counterclockwise and the protrusion 37 moves to the stopper 38.
The cover 20 comes into contact with the clamp receiver 2 and stops at a fixed position.
3 is held by the clamp 10 and remains stationary in a fixed position. At this time, due to the engagement of the positioning engagement parts 24 and 25, the light source part 1
9 and the drum frame 13 are determined.

In this manner, in order to interlock the cover 20 and the drum frame 13, they may be connected by the connecting rod 40 shown in FIG. 4. When the two are connected by the telescopic rod 28, a permissible range can be given to the rotation angle difference between the cover 20 and the drum frame 13, which is extremely easy to manufacture.

Note that the drum frame 13 may be rotatably attached to the cover 20. Further, the transfer section 5 may be attached to the drum frame 13.

Effects of the Invention Since the present invention is configured as described above, the cover and the frame can be rotated independently to widely open the upper part of the paper conveyance path, the area around the developing unit, the photoconductor, and the area around the light source unit. This makes it easy to deal with paper jams, inspect, and replace parts.Also, when the frame is rotatably attached to one side of the base and the cover is rotatably attached to the other side of the base, The relative position of the light source part held by the cover and the frame can be determined by the positioning engagement part, and furthermore, the charge charged in the light source part and the frame can be flowed to the base by the spring, and further, the relative position of the light source part held by the cover and the frame can be determined by the spring By connecting them with a continuous rod or a telescopic rod, the cover and frame can be opened and closed with a single operation,
Particularly, by using the telescopic rod, it is possible to absorb variations in the deviation amount between the cover and the frame, and it is possible to easily manufacture the cover.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; FIG. 1 is a side view, partially in section, showing the opening operation of the cover and frame, and FIG. 2 is a side view, partially in section, showing the cover and frame closed. A side view showing the condition, Figure 3 is an exploded perspective view of the telescopic rod,
FIG. 4 is a perspective view of the connecting rod. ■...Base, 5...Transfer section, 6...Fixing roller (
Fixing section), 13... Drum frame (frame), 1
4...Developing section, 16...Photoconductor, 19...Light source section, 20...Cover, 24-25...Positioning engagement section, 26...Spring, 28...Expansion/contraction Rod, 39...Paper, 40...Continuous rod application person Tokyo Electric Co., Ltd. i6 ghost body Bq use ÷r.

Claims (1)

[Scope of Claims] 1. A base in which a fixing section is installed in a path for conveying paper, a frame that rotatably holds a photoreceptor and also holds a developing section, and a frame for forming an electrostatic latent image on the photoreceptor. A cover for holding a light source section to be formed is provided, a transfer section facing the outer periphery of the photoreceptor is provided on the base or the frame, and the frame and the cover approach and retreat from the upper part of the base, respectively. An electrostatic photographic printer characterized by being arranged so that it can rotate freely. 2. A base with a fixing section installed in the path for conveying the paper, a frame that rotatably holds the photoconductor and also holds the developing section, and a light source section that forms an electrostatic latent image on the photoconductor. a cover, a transfer portion facing the outer periphery of the photoreceptor is provided on the base or the frame, the frame is attached to one side of the base so as to be vertically movable, and the cover is placed on the top of the frame. and is attached to the other side of the base so as to be movable up and down. 3. A base with a fixing section installed in the path for conveying the paper, a frame that rotatably holds the photoconductor and also holds the developing section, and a light source section that forms an electrostatic latent image on the photoconductor. a cover, a transfer portion facing the outer periphery of the photoreceptor is provided on the base or the frame, the frame is attached to one side of the base so as to be vertically movable, and the cover is placed on the top of the frame. and is attached to the other side of the base so as to be vertically movable, and a positioning engagement part that engages with each other is formed on opposing surfaces of the light source part and the frame. 4. A base in which a fixing section is installed in a path for conveying paper, a frame that rotatably holds a photoconductor and also holds a developing section, and a light source section that forms an electrostatic latent image on the photoconductor. a cover, a transfer portion facing the outer periphery of the photoreceptor is provided on the base or the frame, the frame is attached to one side of the base so as to be vertically movable, and the cover is placed on the top of the frame. and a conductive spring that is attached to the other side of the base so as to be movable up and down, and that connects between the light source section and the frame and between the frame and the base. photo printer. 5. A base in which a fixing section is installed in a path for conveying paper, a frame that rotatably holds a photoreceptor and also holds a developing section, and a light source section that forms an electrostatic latent image on the photoreceptor. a cover, a transfer portion facing the outer periphery of the photoreceptor is provided on the base or the frame, the frame is attached to one side of the base so as to be vertically movable, and the cover is placed on the top of the frame. and is attached to the other side of the base so as to be vertically movable, and the cover and the frame are connected by a connecting rod so as to be interlocked with each other. 6. A base in which a fixing section is installed in a path for conveying paper, a frame that rotatably holds a photoconductor and also holds a developing section, and a light source section that forms an electrostatic latent image on the photoconductor. A cover is provided on the base or the frame, and a transfer portion facing the outer periphery of the photoreceptor is provided on the base or the frame, and the frame is attached to one side of the base so as to be vertically movable, and the cover is placed on the top of the frame. and is attached to the other side of the base so as to be vertically movable, and the cover and the frame are connected by a telescoping rod biased in the direction of extension so as to interlock with each other.