JP3070243B2 - Laser beam printer toner recovery mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a toner collecting mechanism for a laser beam printer.

[0002]

2. Description of the Related Art FIG. 3 shows a conventional example of a toner collecting mechanism of a laser beam printer. As shown in FIG. 1, the blower 1 supplies an airflow to a cleaning mechanism from the cleaning brush 2 to the filter unit 3. The toner remaining on the surface of the photosensitive drum 4 without being transferred to the printing paper is swept down from the surface of the photosensitive drum 4 by the cleaning brush 2 and sent to the cyclone 5 by the suction force of the blower 1.

The toner separated by the centrifugal action of the cyclone 5 falls along the wall of the cyclone 5 by its own weight and is accumulated in the toner collecting bag 6. The toner that has been completely collected by the cyclone 5 is sent to the filter unit 3 and collected.

[0004] The toner collecting bag 6 is loaded in a removable toner box 7. The toner box 7 is provided with an elastic sealing member in order to maintain airtightness at a connection portion with the cyclone 5.

The toner collecting bag 6 is a disposable type, and when it is full of toner, it is replaced with a new toner collecting bag 6. The toner collection bag 6 is used for easy packing and transportation.
It is folded and packed, and when it is replaced, the toner collecting bag 6 is opened and loaded into the toner box 7.

FIG. 4 shows the periphery of the toner box. As shown in the figure, the cyclone 5, the cyclone cover 8 and the seal member 9 are fixed by screws and an adhesive. The cyclone cover 8 is provided with an auxiliary stand 10 and a hook 11 for fixing the toner box 7.

In the toner box 7, a plate protruding from the side is placed on an auxiliary stand 10 of the cyclone cover 8, and a ring 12 provided on the opposite side is connected to a hook 11 of the cyclone cover 8.
Hang on the part.

[0008] Latch arm 1 linked to ring 12
When the toner box 3 is lowered, the toner box 7 is lifted upward, and is fixed in such a manner as to abut against the seal member 9.

When the toner collecting bag is loaded into the toner box 7, the flange 14 covers the surface of the toner box 7 so as to be loaded. Adhere and maintain airtightness. In the figure, reference numeral 15 denotes a filter paper.

[0010]

In the above prior art, the toner collecting bag is folded and packed for easy packing and transportation. Therefore, when loading the toner collection bag into the toner box, the operator may accidentally load the toner collection bag without expanding the toner collection bag.

Further, when air leakage occurs due to deterioration of a seal member between the toner box and the cyclone, a pressure difference occurs between the inside and outside of the toner collecting bag, and the toner collecting bag may shrink. When the toner collecting bag shrinks, the toner collecting bag cannot accumulate a predetermined amount of toner, and the lower portion of the cyclone may be clogged with toner. In such a state, the toner recovery rate in the cyclone decreases, and the life of the cyclone filter decreases accordingly.

The present invention has been made in view of the above points, and cannot be loaded in the toner box when the toner collecting bag is folded, and does not easily shrink even when an external force is applied to the toner collecting bag. It is an object of the present invention to provide a toner collecting mechanism of a laser beam printer that enables the above-described operation.

[0013]

SUMMARY OF THE INVENTION The object of the present invention is to provide a toner collection bag comprising: a flange having an opening at the center of the surface thereof;
A box-shaped filter paper that is attached to the lower part of the flange and is foldable, and is fixed to the bottom of the filter paper so as to extend from the bottom and to be inserted into the flange along the side surface of the box-shaped filter paper. The present invention is achieved by forming an auxiliary member which is formed at the bottom and which can be bent from the box-shaped bottom end.

[0014]

Since the above means is provided, even if the toner collecting bag is folded and put into the toner box while being folded, the auxiliary member becomes a hindrance, and the loaded toner collecting bag is reinforced by the auxiliary member and receives an external force. Does not bend.

[0015]

Next, the present invention will be described in detail with reference to examples.

[Embodiment 1] FIGS. 1 and 2 show an embodiment of the present invention. The same parts as those in the related art are denoted by the same reference numerals, and the description thereof will be omitted. In this embodiment, a toner collecting bag 6a is provided with a flange 14 having an opening at the center of the surface thereof, a box-shaped filter paper 15 attached to the lower portion of the flange 14 and foldable, and a bottom portion of the filter paper 15. The filter paper 15 extends from the bottom and is fixed.
And an auxiliary member 16 which is formed so that the front end thereof is inserted into the flange 14 along the side surface of the box and which can be bent from the box-shaped bottom end. By doing this,
If the toner collecting bag 6a is folded and put into the toner box with the toner collecting bag 6a folded, the auxiliary member 16 becomes a hindrance, and the loaded toner collecting bag 6a is reinforced by the auxiliary member 16 and does not bend even when subjected to external force. It is possible to obtain a toner collecting mechanism of a laser beam printer that cannot be loaded into the toner box when the collecting bag 6a is folded, and does not easily shrink even when an external force is applied to the toner collecting bag 6a. it can.

That is, the toner collecting bag 6a is
4. It is composed of filter paper 15 and auxiliary member 16. The auxiliary member 16 is adhered to the bottom surface of the filter paper 15, and is disposed in a box shape as shown in FIG. 1 by placing the leading end between the flange 14 and the filter paper 15 so that the auxiliary member 16 can be loaded into the toner box. Becomes Also, at the time of packing, by folding the filter paper 15 and the auxiliary member 16 along the fold line, the auxiliary member 16 protrudes but becomes small as shown in FIG. 2, thereby facilitating transportation.

As described above, according to this embodiment, the auxiliary member is added to the toner collecting bag, so that it is possible to prevent the toner collecting bag from being mistakenly attached to the toner box and the toner collecting bag from being shrunk during the loading.

[0019]

As described above, according to the present invention, a toner collecting bag is provided with a flange having an opening at the center of the surface thereof, a box-shaped filter paper which is attached to a lower portion of the flange and is foldable. An auxiliary member that is fixed to the bottom of the filter paper so as to extend from the bottom and is formed so that its tip is inserted into a flange along the side surface of the box-shaped filter paper, and that can be bent from the bottom end of the box. As a result, the auxiliary member hinders the toner collection bag from being inserted into the toner box with the toner collection bag folded, and the toner collection bag being loaded is reinforced by the auxiliary member so that it does not bend even if it receives external force. When the bag is folded, it cannot be loaded into the toner box, and it does not shrink easily when external force is applied to the toner collection bag. It is possible to obtain a structure.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a state in which a toner collecting bag of a laser beam printer according to an embodiment of the present invention is used.

FIG. 2 is a perspective view showing a state in which the toner collecting bag of the embodiment is packed.

FIG. 3 is an explanatory diagram showing a configuration of a cleaning system of a toner collecting mechanism of a conventional laser beam printer.

FIG. 4 is a vertical sectional side view showing a state when a conventional toner collection bag is loaded.

[Explanation of symbols]

5: cyclone, 6a: toner collection bag, 7: toner box, 14: flange, 15: filter paper, 16: auxiliary member.

Continuation of front page (56) References JP-A-60-26978 (JP, A) JP-A-60-235183 (JP, A) JP-A-57-32967 (JP, U) (58) Fields investigated (Int) .Cl. ⁷ , DB name) G03G 21/10-21/12 A47L 9/10-9/19

Claims (2)

(57) [Claims] 1. A toner collecting mechanism for a laser beam printer, comprising: a toner collecting bag mounted in a toner box and storing toner separated by a cyclone.
The toner collection bag has a flange having an opening at the center of the surface thereof, a box-shaped filter paper which is attached to a lower portion of the flange and is foldable, and is fixed to the bottom of the filter paper by extending from the bottom. Characterized in that it is formed so that the tip thereof is inserted into the flange along the side surface of the box-shaped filter paper, and is constituted by an auxiliary member that can be bent from the bottom end of the box. Laser beam printer toner recovery mechanism. 2. The toner collecting mechanism of a laser beam printer according to claim 1, wherein said auxiliary member is made of cardboard.