JPH11133828A - Printing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the deviation of the rise of toner in a container by providing a rocking mechanism for rocking a storing container interlocked with the opening/closing of the door of a printing device. SOLUTION: A waste toner bottle 32 is placed on a bottle receiver 35 and supported by a spring 37. A light shielding plate a36 and a weight 42 are freely rotated at a supporting point 41. When mass in the bottle 32 becomes large because of excess toner, the spring 37 is contracted and a light shielding plate b38 attached to the receiver 35 shields a detector 34 from light, so that the detector 34 detects that the time when the excess toner in the bottle 32 is taken out has come. By opening the door 39, the receiver 35 is inclined interlocked with the door 39 by a link 43 coupled with the door 39 and the receiver 35. Then, the part of the head of the bottle 32 placed on the receiver 35 is inclined to the door 39 side, so that the bottle 32 is easily taken out. At such a time, since the entrance of the excess toner turns upward, the excess toner is prevented from spillig when the bottle 32 is taken out.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a printing device,
In particular, the present invention relates to a developer spill-prevention structure for a storage container that stores excess developer collected by a recovery mechanism of excess developer generated after development.

[0002]

2. Description of the Related Art In the prior art, a container for collecting discharged toner is placed in a printing apparatus in a stationary state.

[0003]

As a result, there has been a case where the swelling of the toner in the container is biased and spilled from the container opening.

[0004]

SUMMARY OF THE INVENTION The present invention is characterized by an optical device for forming a latent image, a photosensitive device, a developing device for developing the latent image, and a recovery of excess developer generated after the development. A printing device comprising a mechanism and a storage container for collecting excess developer, wherein the printing device further comprises a swing mechanism for swinging the storage container in conjunction with opening and closing of a door of the printing device. ,It is in.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings.

The printing apparatus main body 25 includes developing units 1 to 4, an optical unit 5, a charging unit 8, a photosensitive belt 22, a transfer drum 21, a registration roller 12, a transfer roller 13, a static eliminator 15, a fixing unit 19, and a paper discharge. The roller 18 and the paper feed cassette 6 are main components.

Next, the operation of the printing apparatus main body 25 will be described.

The charger 8 uniformly charges the photosensitive belt 22 in response to a print start signal from a host (not shown).

The optical unit 5 draws a latent image on the photosensitive belt 22 based on the print data sent from the host, and the drawn latent image is developed by any one of the developing devices 1 to 4. The colored particles in the developing device are applied on the photosensitive belt 22.

The photosensitive belt 22 is rotated by a driving source (not shown), and is placed on the transfer drum 21.
Transfer the colored particles above.

Excessive colored particles remaining on the transfer drum 21 are removed by a cleaner 20, and excess colored particles remaining on the photosensitive belt 22 are removed by a cleaner 23. 8 is charged.

In the case of color printing, this process is repeated three or four times while switching the developing device.

On the transfer drum 21, a visible image is formed by colored particles of a single color or a plurality of colors, and when the desired transfer is completed, or beforehand, from the paper feed cassette a6 or the paper feed cassette b7. The paper 27 is fed by the paper feed roller
Alternatively, it is pulled out by the paper feed roller b24 and stands by at the registration roller 12.

At a timing when the position of the visible image formed on the transfer drum 21 coincides with the transfer position on the sheet, the sheet waiting at the registration roller 12 starts to be conveyed again, and At 13 the visible image is transferred to the paper side.

The sheet is separated from the transfer drum 21 by the neutralizer 15, the colored particles are fixed on the sheet by the fixing device 19, and the sheet is discharged to the sheet discharge tray 28.

Excess toner removed by the cleaner 20 and the cleaner 23 is lifted upward from below the duct pipe 33 containing the transport spiral d51 shown in FIG. 5 through a duct not shown here. , Into the discharge toner bottle 32.

FIG. 3 is a detailed view of the periphery of the waste toner bottle 32. The waste toner bottle 32 is placed on a bottle receiver 35 and supported by a spring 37.

The bottle receiver 35 has a light-shielding plate b38 and a projection 4
0, and the projection 40 is a light shielding plate a3 with a weight 42.
Pressing 6.

The light shielding plate a36 and the weight 42 rotate freely at the fulcrum 41. When the mass of the waste toner bottle 32 increases due to excess toner, the spring 37 contracts, and the light shielding plate b38 attached to the bottle receiver 35 shields the detector 34 from light.
It is detected that it is time to take out excess toner in the waste toner bottle 32.

The detector here may be a so-called photo interrupter or a mechanical contact type switch.

Forgetting to put the waste toner bottle 32, the door 39
Is closed and the printer main body 25 is operated,
Since the weight of the bottle receiver 35 is light, the spring 37 is extended, and the bottle receiver 35 is lifted upward.
Is raised, and the light-shielding plate a36 with the weight 42 is also raised to shield the detector 34, thereby detecting that the discharge toner bottle 32 is not mounted.

In this embodiment, since there is only one detector 34, no distinction is made as to whether the waste toner bottle 32 is not mounted or whether the excess toner in the waste toner bottle 32 has increased.

If a detector for detecting only the light-shielding plate a36 and a detector for detecting only the light-shielding plate b38 are provided, whether the waste toner bottle 32 is not mounted, It is possible to distinguish whether toner has increased.

FIGS. 2 and 4 show a state where the door 39 is opened.

When the door 39 is opened, the bottle receiver 35 is tilted in conjunction with the door 39 by the link 43 connected to the door 39 and the bottle receiver 35.

The head portion of the waste toner bottle 32 riding on the bottle receiver 35 is inclined toward the door 39, thereby facilitating the removal of the waste toner bottle 32.

At this time, since the entrance of the surplus toner is directed upward, the surplus toner does not spill when the discharge toner bottle 32 is taken out.

FIG. 5 shows the movement path of the surplus toner. Excess toner from the transfer drum 21 is transferred to the blade a4
5, and is conveyed by the rotating conveying spiral a47 in the direction of the arrow shown in the figure.

Further, when reaching the position of the duct 49,
The surplus toner drops under its own weight, and at the same time, is conveyed by a gear a52 driven by a driving source (not shown).
50 vibrates up and down to help the surplus toner drop and to convey it in the direction of the arrow shown in the figure.

On the other hand, excess toner generated from the photosensitive belt 22 is scraped off by the blade b46, and is conveyed by the rotating conveying spiral b48 in the direction of the arrow shown in the figure.

The surplus toner passes through the joining port 56 and reaches a confluence 57 of the surplus toner. At the surplus toner merging point 57, a gear d55 and a gear c driven by a driving source (not shown)
The rotational force is transmitted to the conveying spiral d51 by the gear 54 and the gear b53, and the surplus toner at the surplus toner merging point 57 is conveyed through the duct pipe 33, and the surplus toner is discharged from the outlet of the duct pipe 33.

FIG. 6 is a view showing an example of the waste toner bottle 32.

[0033]

According to the present invention, the container for collecting the excess toner generated from the transfer drum and the photosensitive belt can be swung in conjunction with opening and closing of the door, thereby eliminating the uneven distribution of the toner in the container. It becomes possible.

[Brief description of the drawings]

FIG. 1 is a sectional view of a printing apparatus according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a printing apparatus showing one embodiment of the present invention.

FIG. 3 is a detailed view of a discharge toner receiving unit according to the embodiment of the present invention.

FIG. 4 is a detailed view of a discharge toner receiving unit according to the embodiment of the present invention.

FIG. 5 is a diagram illustrating a conveyance path of surplus toner according to the embodiment of the present invention.

FIG. 6 is a view showing one embodiment of a waste toner bottle of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Developing device 1, 2 ... Developing device 2, 3 ... Developing device 3, 4 ... Developing device 4, 5 ... Optical unit, 6 ... Paper cassette 1, 7 ... Paper cassette 2, 8 ... Charging device, 10 ... Paper feed rollers 1 and 12
... Registration roller, 13 ... Transfer roller, 15 ... Static eliminator,
Reference numeral 18: paper discharge roller, 19: fixing device, 20, 23 ... cleaner, 21: transfer drum, 22 ... photosensitive belt, 24 ... paper feed roller 2, 25 ... printing apparatus main body, 27 ... paper, 28 ... paper discharge tray, 29: paper detector, 30: printing device main body control unit, 32: discharge toner bottle, 33: duct pipe, 34
... Detector, 35 ... Bottle receiver, 36 ... Light shield plate a, 37 ...
Spring, 38: light shielding plate b, 39: door, 40: projection, 41
... Support points a, 42 ... Weight, 43 ... Link, 44 ... Support point b, 45 ... Blade a, 46 ... Blade b, 47 ... Transport spiral a, 48 ... Transport spiral b, 49 ... Duct, 50 ... Transport spiral c, 51 ... conveying spiral d, 52 ... gear a, 53 ... gear b, 54 ... gear c, 55 ... gear d, 56 ... joining port, 57
... surplus toner junction, 58 ... stopper.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tetsushi Takekoshi 1-1-1 Higashitaga-cho, Hitachi City, Ibaraki Prefecture Inside the Taga Headquarters, Electrical Equipment Division, Hitachi, Ltd. (72) Inventor Tetsuro Akasaki Higashi Taga, Hitachi City, Ibaraki Prefecture 1-1-1, Machi, Hitachi, Ltd.

Claims (2)

[Claims] An optical device for forming a latent image; a photosensitive device; a developing device for developing the latent image; a collecting mechanism for an excess developer generated after the development; and a collecting device for the excess developer. A printing device comprising a storage container, wherein a swing mechanism for swinging the storage container in conjunction with opening and closing of a door of the printing device is provided. 2. The swing mechanism according to claim 1, wherein the swing mechanism comprises a container receiver for housing the storage container, and a link mechanism for connecting the container receiver and a door and swinging the storage container. A printing device characterized by the above-mentioned.