JPH1184972A - Cleaning device for electrophotographic copying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a cleaning device for electrophotographic copying machine capable of improving the removing efficiency of powdery particle such as toner, eliminating failure in an image, and reducing the fluttering of a belt, etc., thereby stably forming an image. SOLUTION: A supporting layer 33 made of synthetic resin is bonded on a pedestal 32 through an adhesive layer 34. Fluff 31 consisting of a rigid part 36 and a sliding part 37 is formed on the front surface of a ground 35 made of the synthetic resin, and a coating layer 39 is provided on the back surface of the ground 35. The fluff 31 is attached to the supporting layer 33 through an adhesive film 38 provided on the back surface of the coating layer 39. The fluff 31 consisting of the rigid part 36 and the sliding part 37 is formed by weaving a fiber 36a having high rigidity and a fiber 37a having high sliding property into pile on the ground 35. The sliding part 36 is arranged on a rear side in the moving direction of a transfer belt and the sliding part 37 is arranged on a front side in the moving direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning device provided in an electrophotographic copying machine.
More specifically, the present invention relates to a cleaning device for removing toner remaining on the back surface of a transfer belt or the like for transferring a toner image onto recording paper in an electrophotographic copying machine.

[0002]

2. Description of the Related Art Conventionally, when copying is performed by an electrophotographic apparatus such as an electrophotographic copying machine or a facsimile, a recording sheet is carried onto a transfer unit by a transfer belt. On the other hand, the toner charged on the developing roller in the developing device is applied onto the photosensitive drum, and a toner image is formed. Thereafter, the toner image formed on the photosensitive drum is transferred onto the recording paper, and the recording paper is carried to a paper discharge roller.

At this time, the transfer belt orbits, and particles such as toner and paper powder remaining on the belt surface during the transfer are removed by a static eliminator or a cleaning blade. Moreover,
It is removed by a cleaning material that contacts the back surface of the transfer belt.

[0004] The cleaning material has a layered structure in which a sliding layer made of felt made of fluororesin fiber is adhered to a support layer made of sponge or the like, so that the sliding layer comes into contact with the back surface of the belt. Are bonded by an adhesive.

[0005]

However, in an electronic copying machine such as a color laser printer, there is a problem that the toner particles cannot be completely removed with the above-mentioned conventional cleaning material due to the further reduction of the toner particles. . Further, in the conventional cleaning material, since the sliding layer is made of felt, there is also a problem that the removability of the toner is deteriorated due to long-time use, because the fibers fall off and the restorability is poor. Further, since the cleaning material is disposed in contact with the back surface of the belt, if the slidability deteriorates due to long-term use, the transfer belt flaps, and the contact between the photosensitive drum and the recording paper is lost. There is also a problem that the image becomes stable and a stable image cannot be formed.

The present invention has been made by paying attention to such problems existing in the conventional technology. The purpose is to improve the efficiency of removing particles such as toner, eliminate image defects, and reduce the flapping of a belt and the like, and stably form an image. An object of the present invention is to provide a cleaning device for a photocopier.

[0007]

According to a first aspect of the present invention, there is provided a cleaning apparatus for an electrophotographic copying machine, wherein a predetermined image is formed by exposure, and the image is developed with toner. To form a toner image,
An electrophotographic copying machine for removing toner or paper dust adhering to the unnecessary portion of the electrophotographic copying machine in which the toner image is fixed to the recording paper by contacting the unnecessary portion of the toner or the unnecessary portion of the paper dust in the electrophotographic copying machine. A cleaning device for a machine, comprising: a predetermined base material, a fuzz made of a fiber having high rigidity, and a fuzz made of a fiber having high slidability, and a tip of each fuzz is a portion where toner does not need to be adhered or paper dust. The gist of the present invention is that it is configured to come into contact with a portion that does not require adhesion.

According to a second aspect of the present invention, there is provided a cleaning apparatus for an electrophotographic copying machine, comprising at least a photosensitive section having a photosensitive drum, a developing section, and a fixing section having a transfer belt or a transport belt rotated by rollers. A predetermined image is formed in a photosensitive section, the developing section develops the image with toner to form a toner image, and a fixing section fixes the toner image on paper. Surface, an outer peripheral surface of a roller, a back surface of a transfer belt or a transfer belt, and a cleaning device for an electrophotographic copying machine in which the leading end thereof is in contact. With fuzz made of high fiber and fuzz made of high slidable fiber,
The gist is that the tip of each fluff is configured to contact a photosensitive drum, a roller, a transfer belt or a transport belt.

According to a third aspect of the present invention, in the cleaning apparatus for an electrophotographic copying machine according to the first or second aspect, the fluff made of the high-rigidity fiber is a photosensitive drum, a roller, or a transfer belt. Alternatively, it is set that the fluff made of a fiber having high slidability is located on the rear side in the moving direction of the transport belt and is located on the front side in the moving direction of the photosensitive drum, the roller, the transfer belt or the transport belt. It is a gist.

According to a fourth aspect of the present invention, there is provided the cleaning apparatus for an electrophotographic copying machine according to any one of the first to third aspects, wherein the fuzz made of the high-rigidity fiber is provided with slidability. The gist of the present invention is to arbitrarily mix fluff with high fiber.

According to a fifth aspect of the present invention, in the invention of the cleaning apparatus for an electrophotographic copying machine according to any one of the first to fourth aspects, the fuzz is replaced by a photosensitive drum, a roller,
The gist is that the transfer belt or the transfer belt is inclined so as to be opposed to the moving direction of the transfer belt.

According to a sixth aspect of the present invention, in the invention of the cleaning apparatus for an electrophotographic copying machine according to any one of the first to fifth aspects, at least a part of the high-rigidity fiber or the slidability is provided. The gist is that at least a part of the high fiber is made of a conductive fiber.

According to a seventh aspect of the present invention, in the invention of the cleaning apparatus for an electrophotographic copying machine according to any one of the first to sixth aspects, a fuzz is formed on the back surface of the substrate by a photosensitive drum, a roller, The gist of the invention is to provide an elastic member having an urging force for urging the transfer belt or the transport belt.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS.

As shown in FIG. 4, the color laser printer 10 is configured so that a colored image formed by a plurality of photosensitive drum units is transferred to a recording paper 11 by a transfer device to perform color printing.

Therefore, a photosensitive drum unit for printing in a predetermined color will be described first. Photosensitive drum 12
Is rotatably supported by a support shaft 13 and is configured to be chargeable on its surface. The charger 14 is disposed above the photosensitive drum 12, and uniformly charges the surface of the rotating photosensitive drum 12. The exposing device 15 is arranged on the advancing side of the charger 14 in the rotation direction of the photosensitive drum 12, and irradiates the photosensitive drum 12 with a light image by laser light to form an electrostatic latent image.

The developing device 16 is disposed on the advancing side of the exposure device 15 in the rotation direction of the photosensitive drum 12, and
The toner is supplied to the electrostatic latent image on the surface of No. 2 to develop the electrostatic latent image. The transfer device 17 is disposed below the photosensitive drum 12 via a transfer belt 18.
The recording sheet 11 on the transfer belt 18 has a photosensitive drum 12
A visible image is transferred by the toner on the surface.

The cleaning device 19 is disposed on the advancing side of the transfer device 17 in the rotation direction of the photosensitive drum 12, and the cleaning blade 19b in the housing 19a removes the toner remaining on the surface of the photosensitive drum 12 after the transfer. Remove particles. The eraser 20 includes the cleaning device 1
9 is provided between the charger 9 and the charger 14 and erases charges remaining on the photosensitive drum 12.

The transfer belt 18 is rotatably supported by a driving roller 21 and a driven roller 22 below a plurality of photosensitive drum units. Recording paper 1
Reference numeral 1 denotes a paper feed roller (not shown) which is carried on the transfer belt 18 to a paper discharge roller (not shown).

The paper discharging device 23 is disposed above the driven roller 22, and is configured to remove charges from the recording paper 11 charged by the photosensitive drum 12. The belt static eliminator 24 is disposed below the driven roller 22 and is configured to neutralize the charge of the transfer belt 18 that is charged by the photosensitive drum 12 and circulates. The belt cleaning device 25 is disposed below the transfer belt 18 that goes around the lower side, and the toner and paper powder remaining on the surface of the transfer belt 18 after transfer are transferred by the belt cleaning blade 25b in the housing 25a. Etc. are removed. The receiving roller 26 is disposed above the transfer belt 18 and receives a pressing force of the belt cleaning blade against the transfer belt 18.

As shown in FIGS. 4 and 5, the cleaning device 30 is provided on the back side of the transfer belt 18 between the transfer device 17 and the driven roller 22, and the fluff 31 of the cleaning device 30 The base 18 is mounted on the base 32 so as to come into contact with the back surface of the base 18. This fluff 31
Is formed by a velor. Also, the transfer belt 1
The back surface of No. 8 is a portion where adhesion of toner or paper powder is unnecessary.

That is, as shown in FIGS. 1 to 3, a support layer 33 made of synthetic resin having elasticity is joined to a base 32 by an adhesive layer 34. The base fabric 35 as a synthetic resin base material has a rigid portion 36 and a sliding portion 3 on its surface.
7 are formed, and a coating layer 39 is formed on the back surface. And, it is adhered on the support layer 33 by an adhesive film 38 provided on the back surface of the coating layer 39. Rigid part 36 and sliding part 37
The fluff 31 is made of a fiber 36a having high rigidity and a fiber 37a having high slidability, and is formed on the base cloth 35. The rigid portion 36 is disposed on the rear side in the moving direction of the transfer belt 18, and the sliding portion 37 is disposed on the front side in the moving direction. Such a base cloth 35 forms a velor.

The support layer 33 is made of an elastic material so that the fluff 31 is sufficiently close to the transfer belt 18 and does not hinder the movement. Further, the support layer 33 is preferably made of a material that has high durability and heat resistance and can be bonded with an adhesive. Examples of such a material include synthetic resin foams such as polyurethane, polystyrene, and polypropylene; synthetic rubbers such as ethylene-propylene-diene copolymer rubber (EPDM) and chloroprene rubber; A plastic elastomer or the like is used. Support layer 33 of the present embodiment
Is made of flame-retardant polyurethane foam (Polon U-32, trade name, manufactured by Inoac Corporation, thickness: 1.5 mm). As the polyurethane foam, a high-strength polyester-based polyurethane or a soft polyether-based polyurethane is used depending on the purpose.

The adhesive layer 34 between the support layer 33 and the base 32 is formed of a flexible adhesive. Furthermore, when the adhesive layer 34 has heat resistance and is used in a bent state, it is preferable that the adhesive layer 34 be formed of a material that can be deformed into a curved surface after bonding. As an adhesive having such properties, a pressure-sensitive adhesive such as a rubber-based or acrylic-based adhesive is used. The adhesive layer 34 of this embodiment is made of an acrylic pressure-sensitive adhesive (trade name: F-9469P manufactured by Sumitomo 3M Limited).
C, VHB adhesive transfer tape, thickness 0.125 mm). As the pressure-sensitive adhesive, an adhesive having no core material or an adhesive having an elongated core material is used.

As the base cloth 35, a cloth made of synthetic resin fibers which have heat resistance and can be bonded with an adhesive is used. Examples of the material of the fibers forming the base fabric 35 include cotton, polyester, polypropylene, acrylic resin, nylon, and urethane resin. In the base fabric 35 of the present embodiment, the warp 35a is formed of a spun yarn of polypropylene, and the weft 35b is formed of a spun yarn of polyester.

The rigid portion 36 is formed by alternately twisting fibers having different thicknesses, and the fluff 31 is formed on the base cloth 35. The fluff 31 is preferably formed of a fiber having high rigidity, abrasion resistance and moderate heat resistance. Examples of such fibers include fibers made of polypropylene, aramid resin, fluororesin, and the like. Among them, polypropylene fibers have particularly high rigidity and are most preferable as the material of the fluff 31 of the rigid portion 36. The rigid portion 36 of the present embodiment uses polypropylene (alternating twist of 300 denier / 10 filament yarn and 870 denier / 60 filament yarn) as the fluff 31.

The sliding part 37 is a fluff 31 which is a velor made of highly slidable fibers 37a of the same thickness and the same length.
Is formed on the base cloth 35. This fluff 31
It is preferably formed of a fiber having a small coefficient of friction, abrasion resistance and moderate heat resistance. Examples of such fibers include fibers formed from ultra-high-molecular-weight polyethylene, polypropylene, polyamide, aramid resin, fluororesin, and the like. Among them, fibers composed of fluororesin have a low coefficient of friction and the fluff of the sliding portion 37. 31 is most preferable. In addition, polypropylene is preferable because the strength is appropriate when the fiber is bent and the triboelectricity is good.

Examples of the fluororesin include polytetrafluoroethylene (PTFE), tetrafluoroethylene-perfluoroalkylvinyl ether copolymer (PFA), tetrafluoroethylene-ethylene copolymer (ETFE), and polyvinylidene fluoride (PTFE). PVDF) or the like is used. Of these, P is usually easily available.
TFE is used. The thickness of the fiber is preferably such that the fiber can maintain flexibility. The sliding portion 37 of the present embodiment uses PTFE (TOYOFLON, trade name, manufactured by Toray Industries, Inc., 2400 denier / 180 filament) as the fluff 31.

The velours forming the fluff 31 are obtained by pile weaving, warp knitting, electrostatic flocking, and the like. The fluff 31 of the present embodiment is obtained by pile weaving. This pile weave includes velvet, plush, bettin, cole, and the like depending on the weave, and is used properly depending on the use site or purpose.

As shown in FIG. 3, the pile weave is composed of a warp 35a and a weft 35b forming a base fabric 35 as a base material.
Is a method of weaving fluff 31 as a pile yarn. In particular, the yarn forming the fluff 31 of the rigid portion 36 has a thick yarn 36b as a center as shown in FIG.
c is wound. The area ratio between the rigid portion 36 and the sliding portion 37 is 1: 1 to 1: 2. If the area ratio of the sliding portion 37 is smaller than this, the movement of the transfer belt 18 is hindered and larger. In this case, the scraping effect of the rigid portion 36 is reduced. Note that the area ratio in the present embodiment is 1: 1 between the rigid portion 36 and the sliding portion 37.

As shown in FIG. 5, the inclination of the fluff 31 is such that the direction in which the fluff 31 extends from the root thereof to the hair tip side is the transfer belt 18.
The hair is slanted in a direction opposite to the direction of travel. The specific inclination angle of the fluff 31 is as follows.
Is set at 5 to 90 ° with respect to the direction perpendicular to the traveling direction of In addition, it has a function of scraping and removing the powder 27 attached to the back surface of the transfer belt 18.

As the coating agent for forming the coating layer 39, a rubber-based solvent type adhesive such as styrene-butadiene copolymer rubber or an adhesive resin such as ethylene-vinyl acetate copolymer or polymethyl methacrylate is used. Can be These coating agents are impregnated between the fibers forming the base fabric 35, and the fluff 31 woven in pile on the base fabric 35.
Is firmly held at the base.

The adhesive film 38 is formed of an acrylic adhesive or the like. The adhesive film 38 has flexibility even after the adhesive is cured, and has a heat-resistant rubber type.
It is preferable to be formed with an adhesive such as an acrylic type.
The adhesive film 38 of the present embodiment is formed of an acrylic adhesive.

Next, the operation of the cleaning device 30 will be described. As shown in FIG. 4, when printing is performed by the color laser printer 10, first, the recording paper 11 is sent to the surface of the transfer belt 18 from a paper feed roller (not shown) and supplied to the photosensitive drum 12 side. on the other hand,
The surface of the photosensitive drum 12 is uniformly charged by the charger 14, an electrostatic latent image is formed on the surface of the photosensitive drum 12 by the exposure device 15, toner is supplied to the electrostatic latent image by the developing roller, and the electrostatic latent image is formed. Image development takes place. Then, a visible image is transferred from the toner on the surface of the photosensitive drum 12 onto the recording paper 11 by the transfer device 17.

After the transfer, the charge of the recording paper 11 charged at the time of transfer is removed by the paper discharging device 23, and the discharged recording paper 11 is sent to a discharge roller (not shown). The charged transfer belt 18 goes around the driven roller 22 to be neutralized by the belt neutralization device 24. The transfer belt 18 is further circulated and, while being supported by the receiving roller 26, the powder particles 27 remaining on the surface thereof are removed by the belt cleaning blade 25b of the belt cleaning device 25.

In the above transfer process, the photosensitive drum 12
When the visible image is transferred by the toner to the recording paper 11, the residual toner falls onto the surface of the transfer belt 18. Also, when the recording paper 11 is supplied, paper dust adheres to the surface of the transfer belt 18. These particles 27 are
As the transfer belt 18 moves, it leaks from both sides of the transfer belt 18 to the back surface of the transfer belt 18 and adheres.
At this time, the fluff 31 of the rigid portion 36 disposed on the rear side in the traveling direction of the transfer belt 18 scrapes off the powder 27 attached to the back surface of the transfer belt 18, and the scraped powder 27 is removed. Are collected in the fibers of the rigid portion 36 or the sliding portion 37. The movement of the transfer belt 18 is smoothly performed without being hindered by the fluff 31 of the sliding portion 37 disposed on the front side in the traveling direction.

The cleaning device 30 of the present embodiment
Since the fluff 31 is flattened so as to be opposed to the traveling direction of the transfer belt 18, the powder 27 is effectively scraped off from the back surface of the transfer belt 18 and collected in the fluff 31. You. Further, the support layer 33 is formed of a material having flexibility and elasticity, and is always urged in a direction in which the tip of the fluff 31 is pressed against the back surface of the transfer belt 18. Therefore, the tip of the fluff 31 is in contact with the back surface of the transfer belt 18 without any gap.

The polypropylene fiber used for the fluff 31 of the rigid portion 36 has high rigidity, and the transfer belt 1 has a high rigidity.
8 The powder 27 on the back surface is effectively scraped off. Sliding part 3
Since the fluororesin fibers used for the fluff 31 of the No. 7 have high slidability and low friction, even if the bristle tip is always in contact with the transfer belt 18, the transfer belt 1
8 is hardly hindered, and the transfer belt 18 is smoothly circulated. Further, since the fluororesin fiber has flexibility and restoring property, even if the fluff 31 falls down in the traveling direction due to the movement of the transfer belt 18, it returns to the original shape,
The cleaning effect is maintained even after a long use.

The effects exerted by the first embodiment will be described below. The cleaning device 30 for the granular material 27 according to the first embodiment.
According to the fibers forming the fluff 31 of the rigid portion 36,
Those having high rigidity and further having wear resistance are used. For this reason, the tip of the fluff 31 reliably scrapes off the fine particles 27 attached to the back surface of the transfer belt 18,
It is possible to improve the efficiency of removing the granular material 27 and eliminate the problem of the image.

According to the cleaning device 30 for the granular material 27 of the first embodiment, the fibers forming the fluff 31 of the sliding portion 37 have high slidability and low friction and wear resistance. Is used. Therefore, in a state where the tip of the fluff 31 is always in contact with the back surface of the transfer belt 18,
The transfer belt 18 is smoothly moved around, and the photosensitive drum 1 is moved.
2 can be brought into contact with the recording paper 11 in a stable state, and a good image can be formed.

According to the cleaning device 30 for the granular material 27 of the first embodiment, the rigid portion 36 is
, And the sliding portion 37 is disposed so as to be located on the front side of the transfer belt 18. Therefore, the removal efficiency of the granular material 27 can be effectively improved by the rigid portion 36, and the movement of the transfer belt 18 can be prevented from being hindered by the sliding portion 37, so that the driving can be smoothly performed. it can.

According to the cleaning device 30 for the granular material 27 of the first embodiment, the fluff 31 is
Is formed so as to form a predetermined angle in a direction opposite to the traveling direction of the vehicle. For this reason, the removal efficiency of the granular material 27 can be more effectively improved.

According to the cleaning device 30 for the granular material 27 of the first embodiment, the support layer 33 is formed of an elastic material. For this reason, the tip of the fluff 31 is constantly urged in the direction in which it comes into contact with the back surface of the transfer belt 18. Therefore, the effect of removing the particles 27 of the cleaning device 30 can be reliably exhibited.

According to the cleaning device 30 for the granular material 27 of the first embodiment, the fibers forming the fluff 31 include:
Those having elasticity are used. Thereby, the fluff 31 can be provided with a restoring property, the tip of the fluff 31 can always be kept in contact with the back surface of the transfer belt 18, and the durability of the fluff 31 can be improved. .

According to the cleaning device 30 for the granular material 27 of the first embodiment, since the fluff 31 is formed by pile weaving on the base cloth 35, it is possible to effectively prevent the fluff 31 from falling off. Can be.

According to the cleaning device 30 for the granular material 27 of the first embodiment, since the root of the fluff 31 is firmly held by the coating layer 39 provided on the back surface of the base cloth 35, the fluff 31 Can surely be prevented from falling off.

(Second Embodiment) Hereinafter, a second embodiment of the present invention will be described in detail with reference to FIG. The description of the second embodiment will focus on the differences from the first embodiment.

As shown in FIG. 6, in the cleaning device 30 for the granular material 27 according to the second embodiment, the conductive fiber 40 is mixed into the fluff 31. The conductive fiber 40 is made of a synthetic resin fiber mixed with carbon, has conductivity, and can remove the charge of the charged granular material 27,
The powder 27 is easily held in the fluff 31. As the conductive fiber 40 in the second embodiment, an acrylic fiber containing carbon (trade name: SA-7, manufactured by Toray Industries, Inc., 300 denier / 48 filament) is used.

The fluff 31 of the cleaning device 30 according to the second embodiment contains the conductive fiber 40, so that the powder 27, such as toner, which is normally negatively charged, By contacting the fluff 31 of the conductive fiber 40, the negative charge is removed. Therefore, the powder 27 that is easily attached to the transfer belt 18 due to the negative charge is easily collected by the fluff 31 of the conductive fiber 40.

The effects exerted by the second embodiment will be described below. The cleaning device 30 for the granular material 27 according to the second embodiment.
According to the method, the conductive fibers 40 are mixed in the fluff 31. For this reason, compared with the first embodiment, it is possible to remove the charge of the electrostatically charged particles 27 and to improve the collecting property of the cleaning device 30.

According to the cleaning device 30 for the granular material 27 of the second embodiment, the conductive fiber 40 is obtained by blending carbon with a synthetic resin, so that it is easy to obtain and the increase in manufacturing cost can be suppressed. it can.

(Third Embodiment) Hereinafter, a third embodiment of the present invention will be described in detail with reference to FIG. In the third embodiment, the points different from the first and second embodiments will be mainly described.

As shown in FIG. 7, the cleaning device 30 for the granular material 27 according to the third embodiment includes the fluff 3 which has been divided into the rigid portion 36 and the sliding portion 37 in the first embodiment.
1 is a fiber 36a having high rigidity and a fiber 37a having high slidability.
Are arbitrarily mixed and formed.

The cleaning device 30 of the third embodiment for cleaning the granular material 27 is not divided into the rigid portion 36 and the sliding portion 37.
7 is scraped off over the entire fluff 31,
The entire fluff 31 is slidably contacted with the transfer belt 18.

The effects exerted by the third embodiment will be described below. A cleaning device 30 for the granular material 27 according to the third embodiment.
According to this, the fluff 31 is formed by arbitrarily mixing the highly slidable fiber 37a and the highly rigid fiber 36a.
The cleaning device 30 having a configuration in which the fiber 36a having high rigidity and the fiber 37a having high slidability are combined can be easily manufactured. For this reason, the manufacturing process by pile weaving of the fluff 31 can be simplified, and the manufacturing cost can be reduced.

According to the cleaning device 30 for the granular material 27 of the third embodiment, the granular material 2
7 can be exhibited, and the transfer belt 18
The effect of improving the sliding contact with the surface can be exhibited.

(Fourth Embodiment) Hereinafter, a fourth embodiment of the present invention will be described in detail with reference to FIG. In the fourth embodiment, differences from the first to third embodiments will be mainly described.

As shown in FIG. 8, in the cleaning device 30 for the granular material 27 according to the fourth embodiment, in the first embodiment, the convex portion 41 having an arc-shaped cross section is formed at the end of the support layer 33. . That is, the fluff 31 of the rigid portion 36 is located above the ridge 41 on the support layer 33, and the transfer belt 18
Is biased to the back side of the. Further, the urging force of the fluff 31 of the rigid portion 36 against the back surface of the transfer belt 18 is reduced on the front side in the traveling direction of the transfer belt 18 from the ridge 41.

In the cleaning device 30, the fluff 31 above the ridge 41 of the support layer 33 is urged against the back surface of the transfer belt 18. For this reason, the ridge 41
The powder 27 is more effectively scraped off by the fluff 31 on the upper part of. In addition, the fluff 3 of the portion of the ridge 41 other than the upper part
In No. 1, the urging force on the back surface of the transfer belt 18 is reduced. Therefore, it is possible to prevent the movement of the transfer belt 18 from being hindered.

The effects exerted by the fourth embodiment will be described below. A cleaning device 30 for the granular material 27 according to the fourth embodiment.
According to the method, the convex portion 41 having an arc-shaped cross section is formed at the end portion of the support layer 33, and the fluff 31 is urged toward the back surface of the transfer belt 18 at the upper portion of the convex portion 41, thereby scraping the granular material 27. The taking effect can be further improved. In addition, by reducing the urging force on the back surface of the transfer belt 18 in a portion other than the protrusion 41, the transfer belt 18
Can be prevented from being hindered.

(Fifth Embodiment) Hereinafter, a fifth embodiment of the present invention will be described in detail with reference to FIG. In the fifth embodiment, the points different from the first to fourth embodiments will be mainly described.

As shown in FIG. 9, the cleaning device 30 for the granular material 27 of the fifth embodiment differs from the cleaning device 30 of the fourth embodiment in that a support layer 33 made of synthetic resin is provided below the rigid portion 36.
Instead, one side edge is fixed on the base 42 and the other side edge presses the lower surface of the base cloth 35 as a leaf spring 43 as an elastic member.
Is provided. Then, the fluff 31 of the rigid portion 36 is always urged by the leaf spring 43 so as to strongly contact the back surface of the transfer belt 18. In addition, by using for a long time, formation of a gap between the fluff 31 of the cleaning device 30 and the transfer belt 18 due to a reduction in the elastic force of the support layer 33 is prevented.

The effects exerted by the fifth embodiment will be described below. The cleaning device 30 for the granular material 27 according to the fifth embodiment.
According to the present invention, since the leaf spring 43 is used as the elastic member, the effect of removing the granular material 27 can be further improved, and the elastic force of the support layer 33 is reduced by long-time use, and the transfer belt is used. 18 and cleaning device 30
It is possible to prevent a gap from being formed between them.

(Sixth Embodiment) Hereinafter, a sixth embodiment of the present invention will be described in detail with reference to FIG. Note that the sixth embodiment will be described focusing on the differences from the first to fifth embodiments.

As shown in FIG. 10, a cleaning device 30 for a granular material 27 according to the sixth embodiment has a configuration in which the support layer 33 is omitted in the first embodiment. In the case of such a configuration, the support layer 33 is different from that of the first embodiment.
However, the required scraping performance of the granular material 27 is maintained.

The effects exerted by the sixth embodiment will be described below. A cleaning device 30 for the granular material 27 according to the sixth embodiment.
According to the configuration, since the support layer 33 is omitted, the number of components can be reduced, the configuration can be simplified, and the manufacturing cost can be reduced.

(Seventh Embodiment) Hereinafter, a seventh embodiment of the present invention will be described in detail with reference to FIG. In the seventh embodiment, the points different from the first to sixth embodiments will be mainly described.

As shown in FIG. 11, in the cleaning device 30 of the seventh embodiment, a gap portion 44 having no fluff 31 is formed at a predetermined interval on the base cloth 35 in the third embodiment. Therefore, the fluff 3 formed on the surface of the base cloth 35
1 has an uneven shape due to the shape of the fluff 31 portion and the gap portion 44 without the fluff 31. Therefore, the particles 27 are collected by the fibers of the fluff 31, and the collected particles 27 are held in the gap 44.

The effects exerted by the seventh embodiment will be described below. A cleaning device 30 for the granular material 27 according to the seventh embodiment
According to this, the gap portion 44 without the fluff 31 on the surface of the base cloth 35
Is formed, the fluff 31 has an uneven shape. Then, the fluff 31 collects the granular material 27 and the gap portion 44.
By holding the granular material 27, the granular material 27 can be easily and reliably held in the fluff 31.

Each of the above embodiments can be modified and embodied as follows. As shown by the two-dot chain line in FIG. 4, in the first to seventh embodiments, the cleaning device 30 disposed on the back surface side of the transfer belt 18 is replaced with toner or paper of a movable body such as another photosensitive drum 12. It should also be placed in places where powder does not need to adhere. For example, when the cleaning device 30 is provided on the photosensitive drum 12, the cleaning device 30 is provided so that the fluff 31 slides on the inner peripheral surface of the cylindrical photosensitive drum 12. Then, the particles 27 leaking from the outer peripheral surface of the photosensitive drum 12 and adhering to the inner peripheral surface can be removed.

When the driving roller 21, the driven roller 22 and the receiving roller 26 are disposed, the cleaning device 30
Are arranged such that the fluff 31 is in sliding contact with the outer peripheral surface of each of the rollers 21, 22, 26. Then, the particles 27 attached to the outer peripheral surfaces of the rollers 21, 22 and 26 can be removed from the back surface of the transfer belt 18. In addition,
At this time, it is even more preferable that the support layer 33 be made of a heat-shrinkable material such as polyethylene resin, or that a new heat-shrink layer be provided between the base cloth 35 and the support layer 33.

In the case of such a configuration, each of the rollers 21, 22 and 22 cannot be collected by the cleaning device 30 of the embodiment and cannot be collected.
26 or the photosensitive drum 12
The powder 27 adhered to the inner peripheral surface can be reliably collected. In addition, by imparting heat shrinkability to the cleaning device 30, it is possible to easily cope with a curved surface shape by heating, and the operation of joining the cleaning device 30 to each movable body can be easily performed. Further, it is possible to reliably prevent a gap from being formed between the adhesive layer 34 of the cleaning device 30 and the base 32.

In the first to seventh embodiments, the cleaning device 30 provided on the back side of the transfer belt 18
For example, a paper feed roller, a paper discharge roller, a registration roller, and the like.

With this configuration, it is possible to more reliably collect the particles 27 attached to all the rollers that cannot be collected by the cleaning device 30 of the embodiment.

In the first to seventh embodiments, the sliding portion 3
Impregnating the fiber forming No. 7 with a chemical such as silicone oil which improves the slidability. With such a configuration, the slidability of the sliding portion 37 can be further improved.

In the seventh embodiment, instead of providing the fluff 31 portion and the gap portion 44 without the fluff 31 on the surface of the base cloth 35, a concave portion and a convex portion are formed on the surface of the support layer 33, or the uneven layer is formed on the surface. Is provided on the surface of the support layer 33, and the base cloth 35 is provided on the surface of the uneven layer.

With this configuration, the manufacturing cost is increased as compared with the seventh embodiment. However, since the unevenness can be surely formed, the granular material 27 can be more effectively removed. , Can be collected.

In each of the above embodiments, the inclination of the fluff 31 is set so that the extending direction extending from the root to the bristle tip side is perpendicular to the traveling direction of the transfer belt 18.
Alternatively, the transfer belt 18 is set to fall in the traveling direction.

With this configuration, the effect of scraping the powder 27 from the back surface of the transfer belt 18 is slightly reduced as compared with the cleaning device 30 of each of the above embodiments, but the slidability is further improved. Can be done.

In the second embodiment, the conductive fibers 40 are positively charged. With this configuration, it is possible to increase the effect of removing the static electricity of the powder 27 and the effect of adsorbing the powder to the fiber.

In the second embodiment, the base fabric 35
The conductive fabric is used as the fiber forming the base cloth 35, and the base fabric 35 is also provided with the conductive performance. With this configuration, the effect of removing the static electricity from the powder 27 can be further increased.

In the second embodiment, a material containing carbon powder or the like is used as a coating agent for forming the coating layer 39. That is, imparting conductive performance to the coating layer 39.

With this configuration, the effect of removing the static electricity from the granular material 27 can be more reliably exerted. Further, technical ideas that can be grasped from the embodiment will be described below.

The fluff according to any one of claims 1 to 5, wherein the fluff is provided perpendicular to the moving direction of the photosensitive drum, the roller, the transfer belt or the transport belt, or is provided so as to fall in the moving direction. A cleaning device for an electrophotographic copying machine according to any one of the above.

With this configuration, it is possible to remove the granular material while improving the slidability of the cleaning device for the electrophotographic copying machine with respect to the movable body. The cleaning device for an electrophotographic copying machine according to any one of claims 1 to 7, wherein a support layer having elasticity is bonded to a back surface of the base material.

With this configuration, the tip of the fluff can be reliably brought into sliding contact with the transfer belt or the like.
It is possible to improve the ability to remove the granular material. The cleaning device for an electrophotographic copying machine according to any one of claims 1 to 7, wherein the fluff made of the highly rigid fiber is formed by combining fibers having different thicknesses.

With this configuration, it is possible to improve the ability to collect the powder and granules. The cleaning device for an electrophotographic copying machine according to claim 6, wherein an adhesive coating layer is formed on the back surface of the base material, and the coating layer is made conductive by conductive powder.

With this configuration, it is possible to more favorably prevent the granular material from adhering to the photosensitive drum, and to further improve the collecting property for the granular material.

The electrophotography according to any one of claims 2 to 7, wherein the roller is at least one selected from a driving roller, a driven roller, a receiving roller, a paper feeding roller, a paper discharging roller, and a registration roller. Cleaning equipment for copiers.

With such a configuration, it is possible to more favorably prevent the granular material from adhering to each roller, and to further improve the collecting property for the granular material.

[0091]

As described above in detail, according to the present invention, the following effects can be obtained. According to the cleaning device for an electrophotographic copying machine according to the first aspect of the present invention, it is possible to improve the efficiency of removing particles such as toner and the like, to solve the problem of the image, and to reduce the flapping of the belt and the like. An image can be stably formed.

According to the cleaning apparatus for an electrophotographic copying machine according to the second aspect of the present invention, the efficiency of removing particles such as toner at a predetermined location such as a transfer belt is improved, and the problem of an image is eliminated. And at the same time, fluttering of the belt and the like can be effectively reduced, and a stable image can be formed.

According to the third aspect of the present invention, in addition to the effects of the first or second aspect, in addition to the effects of the first or second aspect of the present invention, a powdery material such as a toner or the like is formed by a highly rigid fiber. Removal efficiency can be effectively improved, and the movement of the photosensitive drum, the roller, the transfer belt or the transport belt can be prevented from being hindered by the highly slidable fiber, and the fiber can be driven smoothly. . Claim 4
According to the cleaning device for an electrophotographic copying machine of the invention described in (1), in addition to the effect of the invention according to any one of claims 1 to 3, a combination of a fiber having high rigidity and a fiber having high sliding property is combined. Can be easily manufactured.

According to the cleaning device for an electrophotographic copying machine of the invention described in claim 5, in addition to the effect of the invention described in any one of claims 1 to 4, powder such as toner due to inclined fluff is added. By removing the particles, the efficiency of removing the particles can be easily and reliably improved.

According to the cleaning apparatus for an electrophotographic copying machine of the invention described in claim 6, in addition to the effects of the invention described in any one of claims 1 to 5, powder particles adhere to the photosensitive drum. Can be prevented, and the ability to collect powder and granular materials can be improved.

According to the cleaning device for an electrophotographic copying machine of the invention described in claim 7, in addition to the effect of the invention described in any one of claims 1 to 6, the fluff is generated by the urging force of the elastic member. Can be urged against a transfer belt or the like, and the ability to remove powder and granular materials can be enhanced.

[Brief description of the drawings]

FIG. 1 is a partial perspective view showing a cleaning device according to a first embodiment.

FIG. 2 is a sectional view taken along line 2-2 in FIG. 1;

FIG. 3 is a perspective view showing pile weaving.

FIG. 4 is a schematic explanatory view showing a color laser printer.

FIG. 5 is a partial sectional view showing the operation of the cleaning device.

FIG. 6 is a cross-sectional view illustrating a cleaning device according to a second embodiment.

FIG. 7 is a cross-sectional view illustrating a cleaning device according to a third embodiment.

FIG. 8 is a cross-sectional view illustrating a cleaning device according to a fourth embodiment.

FIG. 9 is a cross-sectional view illustrating a cleaning device according to a fifth embodiment.

FIG. 10 is a sectional view showing a cleaning device according to a sixth embodiment.

FIG. 11 is a sectional view showing a cleaning device according to a seventh embodiment.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 11 ... Recording paper, 12 ... Photosensitive drum, 18 ... Transfer belt, 21 ... Drive roller as a roller, 22 ... Driving roller as a roller, 26 ... Receiving roller as a roller
Reference Signs List 30 cleaning device, 31 fluff, 35 base fabric as base material, 35a warp forming base fabric, 35b weft forming base fabric, 36a high rigidity fiber, 37a high slidability Fiber, 40: conductive fiber, 43: leaf spring as an elastic member.

Claims (7)

[Claims] A predetermined image is formed by exposure, and the image is developed with toner to form a toner image;
An electrophotographic copying machine for removing toner or paper dust adhering to an unnecessary portion of toner or paper dust in an electrophotographic copying machine in which the toner image is fixed to recording paper by contacting the unnecessary portion of toner or paper powder. A cleaning device for a machine, comprising: a predetermined base material, a fluff made of a fiber having high rigidity, and a fluff made of a fiber having a high slidability, and the tip of each fuzz has no toner adhesion portion or paper dust. A cleaning device for an electrophotographic copying machine configured to come into contact with a portion that does not require adhesion. 2. A photosensitive section having at least a photosensitive drum.
A developing unit and a fixing unit provided with a transfer belt or a conveyance belt rotated by a roller, a predetermined image is formed in the photosensitive unit, and the image is developed with toner in the developing unit to form a toner image. In the electrophotographic copying machine where the toner image is fixed on the paper at the portion, the photosensitive drum is arranged so as to face the inner peripheral surface of the photosensitive drum, the outer peripheral surface of the roller, the back surface of the transfer belt or the transport belt, and the leading end thereof is in contact with the photosensitive drum. An electrophotographic copying machine cleaning device, comprising: a predetermined substrate, a fuzz made of a highly rigid fiber, and a fuzz made of a highly slidable fiber, and the tip of each fuzz is a photosensitive drum and a roller. And a cleaning device for an electrophotographic copying machine configured to be in contact with a transfer belt or a transfer belt. 3. The fluff made of the highly rigid fiber is located on the rear side in the moving direction of the photosensitive drum, the roller, the transfer belt or the transport belt, and the fluff made of the highly slidable fiber is the photosensitive drum and the roller. 3. The cleaning device for an electrophotographic copying machine according to claim 1, wherein the cleaning device is set so as to be located on a front side in a moving direction of the transfer belt or the transport belt. 4. The cleaning apparatus for an electrophotographic copying machine according to claim 1, wherein the fluff made of the fiber having high rigidity and the fluff made of the fiber having high sliding property are arbitrarily mixed. . 5. The cleaning apparatus for an electrophotographic copying machine according to claim 1, wherein said fluff is inclined so as to be opposed to a moving direction of a photosensitive drum, a roller, a transfer belt or a transport belt. . 6. The electrophotographic copying machine according to claim 1, wherein at least a part of the high-rigidity fiber or at least a part of the high-sliding fiber is formed of a conductive fiber. Cleaning device. 7. A fluff on a photosensitive drum on a back surface of the base material,
The cleaning device for an electrophotographic copying machine according to any one of claims 1 to 6, further comprising an elastic member having an urging force for urging the roller, the transfer belt, or the transport belt.