JP2633035B2 - Paper dust removal device for transport rollers - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing paper dust of a transport roller for transporting paper used in a copier, a printer, a printing machine, a facsimile, and the like.

[Conventional technology]

As a device for removing the deposits on the surface of the cylindrical rotating body, for example, a cleaning device for removing toner adhered on the surface of the photosensitive drum has been proposed (JP-A-59-146801).
In this apparatus, a cleaning member is detachably attached to an attachment / detachment mechanism provided in a housing detachable along an axial direction of a photosensitive drum. Further, the housing can be moved up and down by a carrier so that the photoconductor is not damaged.

[Problems to be solved by the invention]

Such a cleaning device is provided with a special carriage for raising and lowering the housing, and since this is operated independently of mounting and dismounting of the cleaning member and the housing, the contact is released when the cleaning member or the housing is removed. In some cases, the cleaning member or the like may be pulled out without performing the cleaning, and this causes a problem that the adhered toner reverses or the surface of the photoconductor is damaged.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a paper dust removing device for a transport roller that easily pulls out a cleaner without causing the paper dust to return to or damage the transport roller.

[Means for solving the problem]

The present invention comprises a housing disposed in parallel with the axial direction of a transport roller, and a cleaner mounted and removed in the housing and facing the surface of the transport roller, wherein the housing is provided inside the housing in the axial direction. A cleaner guide provided to form a cleaner guide space that becomes gradually narrower, a pressing member for pressing the cleaner against the surface of the conveying roller in the housing, and restricting pulling out of the cleaner with the cleaner mounted. And a cleaning member provided on a surface facing the surface of the transport roller in a state where the cleaner is mounted in the housing.

Also, a convex portion may be formed on the side of the transport roller at the tip of the cleaning member in the direction of insertion of the cleaner, and the convex portion may be in contact with the surface of the transport roller when the cleaner is pulled out. Further, a scraper may be provided at a position where the cleaning member slides when the cleaner is pulled out.

[Action]

When the cleaner is stored in the housing, the cleaning member is pressed against the surface of the transport roller by the pressing member. Once mounted, the cleaner restricts the cleaner from being pulled out in a direction parallel to the transport roller.
The cleaning member is rotated by the rotation of the transport roller.
Collects paper dust and the like adhering to the transport rollers. When the cleaner is pulled out of the housing along the cleaner guide, first, the cleaning member and the transport roller are separated to release the regulation. Thus, the cleaner is pulled out along the cleaner guide without contacting the surface of the transport roller.

According to the configuration of the second aspect, when the cleaner is pulled out of the housing, the convex portion at the tip of the cleaning member slides and moves on the surface of the transport roller, and the paper dust and the like remaining on the transport roller are completely removed.

According to the configuration of the third aspect, the paper dust and the like collected by the cleaning member when the cleaner is pulled out are scraped off by the scraper together with the above-mentioned drawing operation.

〔Example〕

FIG. 1 is an overall configuration diagram of a paper dust removing device for a transport roller according to a first embodiment of the present invention. FIG. 1 (a) is a plan view of a housing, FIG. 1 (b) is a plan view of a cleaner, FIG. () Is a left side view of FIG. (A) in a state where the cleaner is installed.

In FIG. 1A, reference numeral 1 denotes a housing of a paper dust removing device, and a cleaner 2 described below is guided inside the housing.
Each member for contacting the peripheral surface of the transport roller 3 is housed and arranged. As shown in FIG. 2B, the transport roller 3 is pressed against the transport roller 3 'and rotates synchronously to feed a sheet downstream between the transport rollers 3 and 3'.

Reference numeral 4 denotes a support plate having a longitudinal dimension in the axial direction of the transport roller 3 constituting the housing 1. Side plates 5, 5 'are attached to both ends of the support plate 4. The side plates 5, 5 'are formed with holes 6, 6' (6 not shown) at corresponding positions, and are loosely fitted to the rotating shaft 7 of the transport roller 3, respectively.

As a result, the support plate 4 is disposed in parallel with the axial direction of the transport roller 3. The housing 1 is fixed at a suitable position on a main body (not shown) or locked by a support plate 4 so as not to rotate with the rotation of the transport roller 3.

As shown in FIG.
Notch 5a that serves as an insertion opening when is inserted into housing 1
Are formed, and a restriction piece 5b for restricting the removal of the cleaner 2 when the cleaner 2 is mounted is formed in the remaining portion of the notch 5a.

Reference numeral 8 denotes a cleaner guide fixed to the support plate 4 so as to form a cleaner guide space 9 inside the housing 1 which faces the transport roller 3 and gradually narrows toward the side plate 5 '. Reference numeral 8a denotes a part of the cleaner guide 8, which is a notch formed at an appropriate position on the side plate 5 side.

Reference numeral 10 denotes a cleaner pressing member which is axially mounted on the notch 8a. The cleaner pressing member 10 uses the restoring force of the spring 11 so that the mounted cleaner 2 comes into contact with the surface of the transport roller 3 with a suitable pressing force.

FIG. 2 is a perspective view showing the detailed structure of the cleaner pressing member 10, and FIG. 3 is a sectional view taken along the line II-II of FIG. .

The cleaner pressing member 10 is formed at a position serving as a center of rotation, at a position facing a hole 10a into which a spindle pin 12 (see FIG. 3) is loosely fitted, and orthogonal to a supporting axis direction by the hole 10a. The pressing piece 10b of the cleaner 2 is on one side in the
A locking hole 10c for locking one end of the spring 11 is formed on the other side. The other end of the spring 11 is locked in place on the support plate 4 or the cleaner guide 8. As a result, the cleaner pressing member 10 is constantly urged counterclockwise in FIG.

In FIG. 2B, the cleaner 2 is a cleaning member having a longitudinal dimension made of, for example, sponge or urethane.
13, and a holding table 14 holding the cleaning member 13, for example, having a U-shaped cross section. Also, the holding table 14
Is provided with a grip portion 14a on the front side thereof, so that the cleaner 2 can be conveniently inserted and withdrawn.

When the cleaner 2 is inserted into the cleaner guide space 9 from the notch 5a of the side plate 5 shown in FIG. 1A in the direction of the arrow A, and the cleaner 2 is housed in the cleaner guide space 9, the cleaner pressing member 10 Receiving a clockwise bias,
The cleaning member 13 of the cleaner 2 uniformly contacts the surface of the transport roller 3 in the axial direction with a suitable pressing force.
In this mounting state, as shown in FIG.
Is held in contact with the holding table 14 and the restriction piece 5b so as not to be pulled out in the opposite direction of the arrow A as it is, that is, in parallel with the rotating shaft 7. Due to the regulation at the time of mounting, the pulling-out operation is performed while the transporting roller 3 is driven, and the pulling-out cannot be performed while sliding on the surface of the transporting roller 3.

When the transport roller 3 rotates while the cleaner 2 is mounted, paper dust and the like adhering to the surface of the transport roller 3 are collected on the cleaning member 13. This cleaning member 13
And the like are discharged to the outside by pulling the cleaner 2 out of the housing 1.

That is, when pulling out the cleaner 2, first, the front side of the cleaner 2 is separated from the surface of the transport roller 3 against the urging force of the cleaner pressing member 10 to release the contact between the cleaning member 13 and the surface of the transport roller 3. At this time, the regulation between the holding table 14 and the regulation piece 5b is released. Then, while maintaining this posture, the cleaner 2 is pulled out of the housing 1 along the cleaner guide 8.

FIG. 4 is a plan view of an essential part showing a second embodiment of the present invention, in which a cleaner 20 is used in place of the cleaner 2 of FIG. 1, and other components are the same as those of FIG. Having a configuration. FIG. 5A shows a state in which the cleaner 20 is mounted.
FIG. 2B shows a state in which the cleaner 20 is being pulled out.

The cleaner 20 includes a cleaning member 23 having a protruding portion 23a on the side of the conveying roller 3 at the tip end. As shown in FIG. 3A, when the cleaner 20 is mounted, the convex portion
Reference numeral 23a is located at least on the back side of the back end position of the conveying roller 3. Then, FIG.
When the cleaner 20 is pulled out from the housing 2 as shown in FIG. 3, the convex portion 23a moves (slids and moves) while contacting the surface of the transport roller 3 from its front end position to the front position. Paper powder etc. remaining on the surface of the
Guided to the outside together with 23a and discharged.

FIG. 5 is a configuration diagram of a main part showing a third embodiment of the present invention, in which a scraper 24 and a paper dust receiver 25 are arranged in the configuration of FIG. FIG. 4A is a diagram showing a state in which the cleaner 2 is being pulled out, and FIG. 4B is a diagram showing a part of a view taken in the direction of arrow B in FIG.

The scraper 24 is provided at a position where the surface of the cleaning member 13 moves while sliding on the engine at the tip of the scraper 24 when the cleaner 2 is pulled out. This scraper 24 has a width dimension equal to the short width dimension of the cleaning member 13 as shown in FIG.
Or more are used. During the operation of pulling the cleaner 2 out of the housing 1, the cleaning member 13 slides on the leading edge of the creper 24 to scrape off paper dust and the like attached to the cleaning member 13, so that the lower paper dust receiving member is removed. Store in 25.

Note that the scraper 24 is preferably made of a material that does not damage the cleaning member 13. This third embodiment is also applicable to the device of the second embodiment.

Further, in the present embodiment, the regulating piece 5b is provided at the cleaner insertion opening as the regulating member. However, other configurations can be adopted, and the position is not limited to the cleaner insertion opening.

〔The invention's effect〕

As described above, according to the present invention, when the cleaner is removed from the housing, the cleaner and the transport roller are prevented from coming into contact with each other.
Paper dust and the like attached to the cleaner can be easily discharged without damaging the surface of the transport roller.

Further, since the cleaning member having a convex shape is provided on the tip side of the cleaner, it is possible to effectively remove paper dust and the like that has returned to the transport roller.

Furthermore, since the scraper is provided so that the cleaning member slides and moves during the removal of the cleaner, it is possible to effectively remove the paper dust and the like from the cleaning member.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of an apparatus for removing paper dust of a conveying roller according to a first embodiment of the present invention. FIG. 1 (a) is a plan view of a housing, FIG. 1 (b) is a plan view of a cleaner and FIG. ) Is a left side view of the above-mentioned view (a) showing a state where the cleaner is installed, FIG. 2 is a detailed perspective view of the cleaner pressing member, FIG. 3 is a cross-sectional view taken along the line II-II of FIG. FIG. 4 is a view showing a second embodiment of the present invention, wherein FIG. 4 (a) shows a state in which a cleaner is mounted, FIG. 4 (b) shows a state in which the cleaner is being pulled out, and FIG. FIG. 7A is a view showing a third embodiment of the present invention, FIG. 7A is a view showing a state in which the cleaner is being pulled out, and FIG. 8B is a view showing a part of a view taken in the direction of arrow B in FIG. is there. 1 ... housing, 2,20 ... cleaner, 4 ... support plate,
5, 5 '... side plate, 5a ... notch, 5b ... regulating piece, 8 ... cleaner guide, 9 ... cleaner guide space, 10 ... cleaner pressing member, 10b ... pressing piece, 11 ... spring, 13,23 Cleaning member, 14 Holder, 23a Projection, 24
…scraper

Claims (3)

(57) [Claims] 1. A housing provided in parallel with an axial direction of a transport roller, and a cleaner mounted in and removed from the housing and opposed to a surface of the transport roller, wherein the housing has the axial direction therein. A cleaner guide disposed to form a cleaner guide space that becomes narrower in order, a pressing member for pressing the cleaner against the surface of the conveying roller in the housing, and restricting the removal of the cleaner when the cleaner is mounted. And a cleaning member provided on a surface facing the surface of the transport roller when the cleaner is mounted in the housing. 2. A cleaning device according to claim 1, wherein a convex portion is formed on a side of the transport roller at a tip portion of the cleaning member in a direction of insertion of the cleaner, and the convex portion contacts the surface of the transport roller when the cleaner is pulled out. The paper dust removing device for a transport roller according to claim 1, wherein: 3. An apparatus according to claim 1, wherein a scraper is disposed at a position where said cleaning member slides when said cleaner is pulled out.