JP4120689B2 - Conveying apparatus and image forming apparatus - Google Patents

Description

  The present invention relates to a conveyance device and an image forming apparatus.

  As a conventional image forming apparatus, a primary transfer portion that transfers a toner image from a photosensitive member to an intermediate transfer member, a secondary transfer portion that transfers a toner image from the intermediate transfer member to a sheet, and a residual image on the photosensitive member and the intermediate transfer member. In an image forming apparatus including a cleaning unit for removing toner, the width of the photosensitive member cleaning unit is made larger than the width of the intermediate transfer member cleaning unit, and the upstream side of the intermediate transfer member from the downstream side of the primary transfer unit to the upstream side of the intermediate transfer unit cleaning unit There is known an image forming apparatus in which an auxiliary cleaning unit is disposed between the two (Patent Document 1).

JP 2001-34079 A

  SUMMARY An advantage of some aspects of the invention is that it provides a conveyance device and an image forming apparatus that can clean a conveyance member satisfactorily.

According to the first aspect of the present invention, there is provided a flat belt-shaped transport member that holds a transported object on one surface and has a guided portion formed in the transport direction on the other surface, and a support member that supports the transport member. A guide portion that is provided at an end in an axial direction and that contacts the guided portion to guide the transport member; contacts one surface of the transport member including a position corresponding to the support member; and The cleaning member is pressed against the transport member so that the contact pressure between the cleaning member to be cleaned and the cleaning member at the position corresponding to the guided portion and the transport member is higher than the contact pressure at another position. And a pressing unit that performs the above operation.

The present invention according to claim 2 further includes a support member that supports the cleaning member, and the pressing portion is formed in the support member according to claim 1 .
The present invention according to claim 3 further includes a cleaning device body that collects the removed material removed from the transport member by the cleaning member, and the pressing portion is formed in the cleaning device body.
It exists in the conveying apparatus of Claim 1 .
According to a fourth aspect of the present invention, an opening is formed in the cleaning device main body so as to face the conveying member, and the removed material passes through the opening and is collected by the cleaning device main body. It exists in the conveying apparatus of Claim 3 .

The present invention shown in claim 5 is provided at an end of the opening, the conveying apparatus according to claim 4, further comprising a sealing member for sealing a gap between the cleaning member and the end portion of the opening is there.

The present invention according to claim 6 is the transport apparatus according to any one of claims 1 to 5 , further comprising a biasing member that biases the pressing portion toward the transport member.

According to a seventh aspect of the present invention, there is provided an image forming apparatus comprising the conveying device according to any one of the first to sixth aspects.

  According to the first aspect of the present invention, it is possible to provide a transport device that can prevent cleaning leakage caused by bending of the transport member caused by the guided portion.

According to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, it is possible to provide a transport apparatus that can prevent cleaning leakage caused by bending of the transport member with a simpler configuration. Can do.
According to the third aspect of the present invention, in addition to the effect of the first aspect of the present invention, it is possible to provide a transport apparatus that can prevent cleaning leakage caused by bending of the transport member with a simpler configuration. Can do.
According to the fourth aspect of the present invention, in addition to the effect of the present invention according to the third aspect , it is possible to provide a transport apparatus that can easily collect the removed matter.

According to the fifth aspect of the present invention, in addition to the effect of the present invention according to the fourth aspect , it is possible to provide a transport device capable of preventing the developer from leaking out.

According to this invention concerning Claim 6 , in addition to the effect of this invention concerning any one of Claim 1 thru | or 5 , compared with the case where it does not have this structure, the contact pressure with respect to the conveyance member of a cleaning member is adjusted. It is possible to provide a transfer device that can perform the above operation.

According to the seventh aspect of the present invention, it is possible to provide an image forming apparatus having a conveying device that exhibits the effect of the present invention according to any one of the first to sixth aspects.

Next, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an image forming apparatus 10 according to a first embodiment of the present invention. The image forming apparatus 10 includes an image forming apparatus main body 12, and an image forming unit 14 used as an image forming unit and a sheet supply device 54 are disposed in the image forming apparatus main body 12. In addition, a sheet discharge unit 15 for discharging a sheet on which an image has been formed is provided on the upper part of the image forming apparatus main body 12. The sheet supply device 54 supplies a sheet to the image forming unit 14 as a conveyed product used as a transfer medium.

  The image forming unit 14 is an electrophotographic system that forms a color image, and an image forming unit 18B that forms a black image using a black developer and an image formation that forms a yellow image using a yellow developer. The image forming unit 18C includes an image forming unit 18C that forms a cyan image using a cyan developer, and an image forming unit 18M that forms a magenta image using a magenta developer. These image forming units are arranged in order from the lower side in the direction of gravity, which is upstream in the sheet conveying direction, along the conveying belt 46 used as a conveying member, in order from the image forming unit 18B, the image forming unit 18Y, the image forming unit 18C, and the image forming unit 18M. Are arranged in the order. Details of the conveyor belt 46 will be described later.

  Since the image forming units 18B, 18Y, 18C, and 18M have the same configuration although the colors of the images to be formed are different, the configuration of the image forming unit 18 will be described below. Each image forming unit 18 includes a photosensitive member 22 used as an image carrier, a charging device 24 used as a charging unit for uniformly charging the photosensitive member 22, and latent image writing for writing a latent image on the photosensitive member 22 by light. An optical writing device 26 used as a means, a developing device 28 used as a current means for developing a latent image written on the photosensitive member 22 with a developer, and a developer image formed on the photosensitive member 22 are transferred to a sheet. Each has a transfer roll 50 and a cleaning device 30 used as a developer removing means for removing the developer image remaining on the surface of the photoreceptor 22 after the transfer by the transfer roll. The optical writing device 26 comprises a laser exposure device, and emits a laser beam to write an electrostatic latent image on each photoconductor 22.

  Among the members of the image forming unit 18, the photosensitive member 22, the charging device 24, the developing device 28, and the cleaning device 30 are integrated as an image forming structure 32 for each color, and are detachable from the image forming apparatus main body 12. It is installed. Further, the image forming structure 32 is removed by a toner cartridge (toner bottle) 34 as a developer container (replacement unit) that stores developer (toner) supplied to the developing device 28 and a cleaning device 30. A waste toner bottle 36 as a developer collecting container for collecting the developer (toner) thus formed is provided integrally or detachably with the image forming structure 32.

  The transfer rolls 50 </ b> B, 50 </ b> Y, 50 </ b> C, and 50 </ b> M are integrated with the other members as a transfer unit 42, and can be detached from the image forming apparatus main body 12. The transfer unit 42 is combined with the transfer rolls 50 </ b> B, 50 </ b> Y, 50 </ b> C, and 50 </ b> M, the driving roll 44, the driven roll 45, the above-described conveyance belt 46, and an adsorption roll used as an adsorption unit that adsorbs the sheet to the conveyance belt 46. 48, and conveys a sheet onto which a toner image of each color is transferred.

  The transfer unit 42 is used as a conveyance device and conveys a sheet held by the conveyance belt 46. The conveyance belt 46 includes a front side surface 47 used as one surface and a back side surface 49 used as the other surface, and holds and conveys the sheet on the front side surface 47. The shape of the conveyor belt 46 is a flat belt shape, for example, an endless shape having no end portion. A suction roll 48 used as a suction means is in pressure contact with the front side surface 47. The suction roll 48 injects electric charges into the conveyance belt 46, charges the conveyance belt 46, and adsorbs the sheet to the charged conveyance belt 46. The driving roll 44 and the driven roll 45 are used as belt support members, and support the conveyance belt 46 from the back side surface 49 side so as to be rotatable.

  In the transfer unit 42, the developer images formed on the surfaces of the photoreceptors 22B, 22Y, 22C, and 22M on the sheet being conveyed while being held on the front side surface 47 of the conveyance belt 46 are transferred to the transfer rollers 50B and 50Y, respectively. , 50C, and 50M, and a full-color developer image is formed on the sheet by superimposing the four color developer images of black, yellow, cyan, and magenta.

  A cleaning device 100 is provided on the side opposite to the side where the image forming structures 32Y, 32M, 32C, and 32B are provided with respect to the conveyance belt 46. The cleaning device 100 is used for removing the developer attached to the front side surface 47 of the transport belt 46 and cleaning the transport belt 46. The cleaning device 100 has a cleaning device main body 102 made of a housing having a hollow portion as a support member, and the cleaning device main body 102 is supported by a cleaning member 104 made of, for example, a cleaning blade and a charge removal film 106. Yes. The developer removed from the conveyor belt 46 is collected in the cleaning device main body 102. For example, one end of the cleaning member 104 is in pressure contact with and in contact with the front side surface 47 of the conveyance belt 46, and the developer is removed by scraping from the front side surface 47 of the conveyance belt 46. The neutralization film 106 has, for example, one end thereof in contact with the conveyance belt 46 and is used for neutralization of the conveyance belt 46 and the developer attached to the conveyance belt 46.

  The sheet supply device 54 includes a storage container 56 that stores the sheet, a transport roll 58 that transports the sheet stored in the storage container 56 toward the image forming unit 14, and a winding roll that rolls the sheet and prevents double feeding of the sheet. 60.

  A fixing device 52 for fixing the developer image transferred onto the sheet to the sheet is provided at the upper part in the image forming apparatus main body 12. The fixing device 52 includes a heating roll 52a and a pressure roll 52b, and heats and presses the sheet passing between the heating roll 52a and the pressure roll 52b, thereby fixing the developer image on the sheet. It has become.

  In the image forming apparatus main body 12, a conveyance path 60 that conveys the sheet supplied from the sheet supply apparatus 54 to the sheet discharge unit 15 is provided, and along the conveyance path 60 in order from the upstream side in the sheet conveyance direction. A registration roll 62, a transfer unit 42, a fixing device 52, and a discharge roll 40 are disposed. The discharge roll 40 discharges the sheet conveyed from the fixing device 52 to the sheet discharge unit 15.

  In FIG. 2, the drive roll 44, the driven roll 45, and the transport belt 46 that the transfer unit 42 has are shown from the back side 49 side of the transport belt 46. The drive roll 44 is supported by a frame (not shown) of the transfer unit 42 by a shaft 64, for example. A drive source 65 such as a motor is connected to the shaft 64, and the shaft 64 rotates in response to drive transmission from the drive source 65 and transmits rotational drive to the drive roll 44. The drive source 65 may be attached to the transfer unit 42 side, or may be attached to the image forming apparatus main body 12 (see FIG. 1) side.

  The driven roll 45 is supported by a shaft 66 so as to be able to rotate, for example, on a frame (not shown) of the transfer unit 42, and rotates following the rotation of the transport belt 46. A guide portion 72 is provided on one end side of the driven roll 45. The guide portion 72 may be fixed to the driven roll 45 and rotated together with the driven roll 45, or may be rotated while being supported by the shaft 66 independently of the driven roll 45. In the present embodiment, the guide part 72 is provided with respect to the driven roll 45 so that the guide part 72 and the driven roll 45 rotate independently. The guide portion 72 is formed with two tapered surfaces 74 and 74 so that both end portions are thick and the center portion is thin.

  The guide portion 72 is a member that contacts a rib 70 described later and guides the movement of the transport belt 46, and is used to prevent the transport belt 46 from being displaced. Here, the deviation means that the conveyance belt 46 moves in one direction in the width direction of the conveyance belt 46 or alternately moves in both directions in the width direction of the conveyance belt 46.

  Ribs 70 used as guided portions are formed on the back side surface 49 of the conveyance belt 46 in the conveyance direction of the conveyance belt 46. The rib 70 is provided so as to protrude from the back side surface 49 of the transport belt 46, and is made of a material different from the transport belt 46 or the same material as the transport belt 46. The rib 70 is attached to the back side surface 49 using, for example, an adhesive. It is attached. Instead of attaching the rib 70 to the back side surface 49, the rib 70 and the conveyor belt 46 may be integrally formed.

  The conveyor belt 46 is stretched around the driven roll 45 and the drive roll 44 so that the rib 70 is positioned between the two tapered surfaces 74 of the guide portion 72. For this reason, when the conveyance belt 46 starts to move in any direction in the width direction, the rib 70 is pushed back to the opposite side to the side where the movement is started by one of the tapered surfaces 74 and 74. Misalignment is prevented.

3 to 6 show the cleaning device 100.
As described above, the cleaning device 100 includes the cleaning device main body 102, the cleaning member 104 and the charge removal film 106 attached to the cleaning device main body 102. As a material of the cleaning member 104, for example, an elastic body having a Young's modulus of approximately 5 MP or more and 10 MP or less can be used. In this embodiment, urethane having a Young's modulus of 7 MP is used. An opening 110 is formed in the cleaning device main body 102 so as to face the conveyor belt 46 on the upper end side. The developer or the like removed from the conveyance belt 46 by the cleaning member 104 passes through the opening 110 and falls into the cleaning device main body 102 and is collected in the cleaning device main body 102.

  The cleaning device main body 102 is used for mounting the cleaning member 104, and, for example, two mounting portions 112 each including a screw hole are formed. Further, the cleaning device main body 102 is formed with, for example, two positioning portions 114 which are used for positioning the cleaning member 104 and are formed of, for example, protrusions.

  The cleaning member 104 is attached to the cleaning device main body 102 via the attachment member 118. The mounting member 118 is used for mounting to the cleaning device main body 102, and is formed with, for example, two mounted portions 120 and 120 each including, for example, a screw hole. Also, the mounting member 118 is formed with, for example, two positioned portions 122 and 122 that are used for positioning to the cleaning device main body 102 and are formed of, for example, through holes.

  One end of the cleaning member 104 in the width direction is attached to the mounting member 118 so that the other end protrudes from the mounting member 118 by, for example, bonding. The portion where the other end portion of the cleaning member 104 protrudes from the mounting member 118 is not directly supported by the mounting member 118, and thus is elastically deformed when it is pressed against the conveyor belt 46, for example.

  The mounting member 118 is positioned with respect to the cleaning device main body 102 such that the positioning portions 114 and 114 made of protrusions are inserted into the positioned portions 122 and 122 made of through holes, for example, and made of screw holes, for example. The mounted portions 120 and 120 are mounted on the cleaning device main body 102 by mounting the mounted portions 120 and 120 on the mounting portions 112 and 112 formed of, for example, screw holes using screws 124 and 124. When the mounting member 118 is mounted on the cleaning apparatus main body 102, the end of the cleaning member 104 opposite to the side on which the mounting member 118 is attached is elastically deformed and bent toward the opposite side of the transport belt 46. The belt 46 is pressed.

  Sealing members 128 are provided on the outer surface of the cleaning apparatus main body 102 so as to cover the end of the opening 110. The sealing members 128, 128 are used to seal a gap that may be formed between the end of the opening 110 formed in the cleaning device main body 102 and the cleaning member 104, and the sealing members 128, 128 are used. By providing this, it becomes difficult for the waste developer to leak out from the gap between the opening 110 and the cleaning member 104.

  In order to prevent the waste developer from leaking out, it is sufficient that the sealing members 128, 128 cover a limited area on each end side of the opening 110. Is provided in an L shape extending from each end of the opening 110 toward the center in the longitudinal direction of the opening 110. (See FIG. 3). Further, in order to support the L-shaped sealing members 128, 128, the extending portions 102a, 102a are configured by extending so that two of the four corners of the opening 110 extend toward the center of the opening, The opening 110 is non-rectangular. Therefore, when the cleaning device 100 is incorporated in the image forming apparatus main body 12 together with the conveying belt 46, the extending portions 102 a and 102 a are used as pressing portions that press the cleaning member 104 from the opposite side to the conveying belt 46. In this embodiment, the extending portions 102 a and 102 a are formed in the cleaning device main body 102.

  The sealing members 128, 128 are made of, for example, an elastic body such as rubber or urethane, and the elastic modulus is generally Young's modulus of 10 MPa or less. In the range where the Young's modulus is 10 MPa or less, it is desirable to use a material having a Young's modulus of 0.05 MPa to 5.5 MPa. In this embodiment, urethane foam having an elastic coefficient of approximately 3.0 MPa is used as the sealing members 128 and 128.

  In the image forming apparatus 10, it is desirable that the cleaning member 104 is in contact with the conveyance belt 46 with no gap across the longitudinal direction of the cleaning member 104. However, a part of the cleaning member 104 may be separated from the conveyance belt 46.

  FIG. 7 shows the cleaning member 104 in a state where a part of the cleaning member 104 is separated from the conveyance belt 46 and a part of the cleaning member 104 is separated from the conveyance belt 46. As shown in FIG. 7, when the cleaning device 100 is mounted on the image forming apparatus main body 12 (see FIG. 1), the end 104a of the cleaning member 104 is placed on the housing 42a of the transfer unit 42 (see FIG. 1). It may be pressed through the sealing member 132. In this case, the end 104a side of the cleaning member 104 may bend in a direction away from the conveyance belt 46. When the cleaning member 104 is curved, a separation region 134 where the cleaning member 104 and the front side surface 47 of the conveyance belt 46 are separated from each other is formed. May occur.

  Further, as shown in FIG. 7, the rib 70 and the guide portion 72 are in contact with each other, for example, because the rib 70 rides on the tapered surface 74 of the guide portion 72. The position 46a on the inner side in the width direction of the conveyor belt 46 may be bent from the position where the rib 70 is provided. In this case, a separation region 136 where the front side surface 47 of the conveyance belt 46 and the cleaning member 104 are separated may be formed around the position 46a.

FIG. 8 illustrates the operation of the sealing member 128 according to the first embodiment of the present invention.
As described above, the sealing member 128 is made of an elastic body, extends from the end portion side of the opening portion 110 toward the central portion side, and is supported from the opposite side of the conveying belt 46 by the extending portion 102a of the cleaning device main body 102. Is supported. For this reason, the cleaning member 104 is pressed and urged toward the conveying belt 46 by the elasticity of the extending portion 102a made of resin and the sealing member 128, for example. Therefore, the separation regions 134 and 136 on the end 104a side of the cleaning member 104 are smaller than the case where the sealing member 128 is provided only at a limited position at the end of the opening 110, and the cleaning member 104 and The area where the front side surface 47 of the conveyor belt 46 comes into contact is widened.

  Further, the extending portion 102 a is provided at a position corresponding to the rib 70, so that the cleaning belt 104 is bent and deformed so that the transport belt 46 protrudes toward the cleaning member 104, and the cleaning member 104 is moved to the transport belt 46. Is pressed to the front side surface 47. Then, when the sealing member 128 is provided only at a limited position on the end side of the opening 110 by pressing the conveying belt 47, the conveying belt 47 is conveyed at a position corresponding to the separation region 136 (see FIG. 7). The belt 46 is prevented from being bent, and the front side surface 47 of the conveying belt 46 and the cleaning member 104 are prevented from being separated from each other.

  The portion of the cleaning member 104 that is pressed against the front side surface 47 of the conveyance belt 46 by the extending portion 102 a has a higher contact pressure with respect to the conveyance belt 46 than the other portion of the cleaning member 104. That is, the cleaning member 104 has a different contact pressure with respect to the conveyor belt 46 depending on the position of the conveyor belt 46 in the width direction.

  As described above, in the image forming apparatus 10 according to the first embodiment, the extending portion 102 a is used as a deflection preventing unit that prevents the conveyance belt 46 from being bent, and resists the deflection of the conveyance belt 46. The cleaning member 104 is used as a pressing portion that presses the front side surface 47 of the conveyor belt 46.

  In the sealing member 128, the position P1 of the end corresponding to the center in the width direction of the transport belt 46 extends to the center than the position P2 of the end of the widest sheet S transported by the transport belt 46. It is desirable. If the position P1 is located at the center side of the position P2, in addition to the pressing by the extending portion 102a, the pressing by the elasticity of the sealing member 128 is also applied. The cleaning member 104 is in good contact with the transport belt 46 over the entire region used for transport.

  FIG. 9 shows a deflection preventing means and a pressing portion according to the second embodiment of the present invention. In the first embodiment described above, the extending portion 102 a is used as a deflection preventing unit that prevents the conveyance belt 46 from being bent, and is used as a pressing portion that presses the cleaning member 104 against the conveyance belt 46. On the other hand, in the second embodiment, the image forming apparatus 10 includes an urging mechanism 140 used as a deflection preventing unit and a pressing plate 142 used as a pressing unit.

  The urging mechanism 140 includes a pressing plate 142, and the pressing plate 142 is located closer to the center than the position corresponding to the position where the rib 70 is arranged in the width direction of the conveying belt 46 of the conveying belt 46 of the cleaning member 104. It is provided in contact with the position. One end of an elastic body 144 made of, for example, a coil spring is connected to the surface of the contact plate 142 opposite to the surface on the side in contact with the cleaning member 104, which is used as an urging member. The other end of the coil spring 144 is attached to the extending portion 102 a of the cleaning device main body 102. Therefore, even if the conveying belt 46 is bent so as to protrude toward the cleaning member 104, the cleaning member 104 is pressed against the front side surface 47 of the conveying belt 46 by the pressing plate 142, and the conveying belt 46 is bent. Is prevented.

  In the first and second embodiments described above, the guide part 72 is provided only on one end side of the driven roll 45, and the rib 70 is attached only on the side where the guide part 72 of the conveyor belt 46 is provided. However, the guide portions 72 may be provided on both ends of the driven roll 45, and the ribs 70 may be provided on both ends of the conveyor belt 47.

  In the first and second embodiments described above, the guide roller 72 is provided on the driven roll 45 among the driven roll 45 and the drive roll 44 used as a support member for supporting the transport belt 46. However, instead of providing the guide portion 72 on the driven roll 45, or in combination with providing the guide portion 72 on the driven roll 45, the guide portion 72 may be provided on the drive roll 44. In this embodiment, two members, a driven roll 45 and a drive roll 44, are used as support members for supporting the transport belt 46, and the transport belt 46 is supported by these two members. For example, the conveyor belt 46 may be supported by three or more support members, such as the conveyor belt 46 supported by three rolls. In this case, the guide part 72 may be provided on at least one of the three or more support members.

  FIG. 10 shows an image forming apparatus 10 according to the third exemplary embodiment of the present invention. In the first embodiment, a sheet is used as a conveyance object, and the conveyance belt 46 conveys the sheet. On the other hand, in the third embodiment, the image itself is used as a conveyance object, and the conveyance belt 46 conveys the image itself. That is, the conveyance belt 46 in the third embodiment is used as a so-called intermediate transfer belt, and the toner image transferred from the photosensitive member 22 at the primary transfer position T1 where the primary transfer is performed is transferred to the sheet. The sheet is conveyed to the secondary transfer position T2 where transfer is performed.

  The image forming apparatus 10 according to the first embodiment includes four photoconductors 22B, 22Y, 22M, and 22C, and the toner images formed by the photoconductors 22B, 22Y, 22M, and 22C are superimposed on the sheet. A color image was formed. On the other hand, the image forming apparatus 10 according to the third embodiment has one photoconductor 22, and a yellow developer image, a magenta developer image, and cyan are sequentially formed on the surface of the photoconductor 22. A developer image and a black developer image are formed, and these developer images are superimposed on the surface of the conveyor belt 46 to form a color toner image on the surface of the conveyor belt 46, and this color toner image is formed on a sheet. An image is formed by transferring.

  In the third embodiment, a developing device 28Y for yellow image formation, a developing device 28M for magenta image formation, a developing device 28C for cyan image formation, and a developing device 28B for black image formation are integrated as a development unit 29. The developing unit 29 rotates around the shaft 31 so that the developing device to be used can be selected from the developing devices 28Y, 28M, 28C, and 28B.

  The image forming apparatus 10 includes a secondary transfer device 96, and the secondary transfer device 96 secondarily transfers the color toner image formed on the conveyance belt 46 to a sheet.

  In the first embodiment, the conveyor belt 46 is supported by one drive roll 44 and one driven roll 45. On the other hand, in the third embodiment, one drive roll 44 and three driven rolls 45a, 45b, 45c are used as support members, and the conveyor belt 46 has one drive roll 44. And three driven rolls 45a, 45b, 45c. In the third embodiment, the guide portion 72 is provided on the driven roll 45c (not shown) in the same manner as the guide portion 72 is provided on the driven roll 45 in the first embodiment.

  Also in the third embodiment, ribs (not shown) are provided on the back side surface of the conveyor belt 46 as in the first embodiment. In the third embodiment, the cleaning device 100 is attached to a position where the conveying belt 46 can be cleaned at a position supported by the driven roll 45c, and the secondary transfer by the secondary transfer device 96 is completed. Later, the developer remaining on the conveyor belt 46 is removed so that the cleaning member 104 of the cleaning device 100 scrapes off.

  The cleaning device 100 is provided with a bending prevention means for preventing the conveyance belt 46 from being bent, and a pressing portion that presses the cleaning member 104 against the conveyance belt 46 against the bending of the conveyance belt 46. As the deflection preventing means and the pressing portion, the extending portion 102a of the cleaning device main body 102 may be used as in the first embodiment described above, or the pressing plate may be used as in the second embodiment described above. The cleaning member 104 may be pressed by an elastic body.

  As described above, the present invention is applied to an image forming apparatus such as a copying machine, a facsimile apparatus, and a printer, and a conveying apparatus having a conveying member such as a sheet conveying belt, an intermediate transfer belt, and a photosensitive belt. Can be applied.

1 is a cross-sectional view illustrating a configuration of an image forming apparatus according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view illustrating a transport device used in the image forming apparatus according to the first exemplary embodiment of the present invention and showing a cross section taken along line AA in FIG. 1. FIG. 3 is a rear view illustrating the cleaning device used in the image forming apparatus according to the first exemplary embodiment of the present invention from the transfer unit side. FIG. 4 is a cross-sectional view showing a main part of the cleaning device used in the image forming apparatus according to the first embodiment of the present invention, and showing a cross section taken along line BB in FIG. It is sectional drawing which shows the principal part of the cleaning apparatus used for the image forming apparatus which concerns on the 1st Embodiment of this invention, and shows the CC line cross section in FIG. FIG. 2 is an exploded perspective view showing a main part of a cleaning device used in the image forming apparatus according to the first embodiment of the present invention. In the 1st Embodiment of this invention, it is explanatory drawing shown supposing the state which became the state from which the cleaning member and the conveyance belt were separated. It is sectional drawing explaining the effect | action of the sealing member which concerns on the 1st Embodiment of this invention, and showing the DD line cross section in FIG. It is sectional drawing which shows the bending prevention means and press part which concern on the 2nd Embodiment of this invention. It is sectional drawing which shows the image forming apparatus which concerns on the 3rd Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Image forming apparatus 14 Image forming part 46 Conveying belt 47 Front side surface 49 Back side surface 70 Rib 72 Guide part 74 Tapered surface 100 Cleaning apparatus 102 Cleaning apparatus main body 102a, 102a Extending part 104 Cleaning member 110 Opening part 128, 128 Sealing member 140 Prevention mechanism 142 Press plate 144 Elastic body

Claims (7)

A flat belt-shaped transport member that holds a transported object on one surface and has a guided portion formed in the transport direction on the other surface;
A guide portion that is provided at an axial end of a support member that supports the transport member, and that guides the transport member in contact with the guided portion;
A cleaning member that contacts one surface of the transport member including a position corresponding to the support member and cleans the transport member;
Wherein As contact pressure between the conveying member and the cleaning member in the corresponding position as the guided portion is stronger than the contact pressure at the other position, and the pressing part for pressing the cleaning member to the conveying member,
Conveying device having The transport apparatus according to claim 1 , further comprising a support member that supports the cleaning member, wherein the pressing portion is formed on the support member. The transport apparatus according to claim 1 , further comprising a cleaning device main body that collects the removed material removed from the transport member by the cleaning member, wherein the pressing portion is formed in the cleaning device main body. The transport device according to claim 3 , wherein an opening is formed in the cleaning device main body so as to face the transport member, and the removed material passes through the opening and is collected by the cleaning device main body. The transport apparatus according to claim 4 , further comprising a sealing member that is provided at an end of the opening and seals a gap between the end of the opening and the cleaning member. The transport apparatus according to claim 1 , further comprising a biasing member that biases the pressing portion toward the transport member. An image forming apparatus comprising the conveying device according to claim 1 .

Images