JPS6385668A - Electrophotographic device - Google Patents

Abstract

PURPOSE:To obtain an invariably stable conveyance performance by discharging charges that a transfer conveyor belt holds by a belt electrostatic discharging means at the position where a transfer material leaves the transfer conveyor belt, and reducing the attractive force based upon the electrostatic force between the transfer conveyor belt and transfer material. CONSTITUTION:The conveyor belt 50 is made of a semiconductor material, so charges leak and decreases in quantity at the position (separation position) where the copying paper 18 separates from the transfer conveyor belt 50, so that the attractive force based upon the electrostatic force between the transfer conveyor belt 50 and copying paper 10 becomes weak. The transfer conveyor belt 50 contacts a separation shaft 54 at the separate position and the surface of the separation shaft 54 is conductive and grounded, so the transfer conveyor belt 50 is discharged electrostatically and the attractive force based upon the electrostatic force between the transfer conveyor belt 50 and copying paper 10 becomes weak. Further, the transfer conveyor belt 50 varies greatly in curvature on the downstream side of the separation position, the copying paper 18 obtains the separating force. Thus, the transfer paper 18 separates naturally from the transfer conveyor belt 50 and is conveyed to a fixing device 38.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an electrophotographic apparatus using the Carlson process;
In detail, it includes a transfer and conveyance unit that transfers and conveys images to copy paper, and can always obtain stable copy images and good paper passing performance regardless of environmental changes, and maintenance such as parts replacement. This invention relates to an electrophotographic device with improved performance.

BACKGROUND OF THE INVENTION In recent years, electrophotographic devices have become smaller and more sophisticated, but improvements in reliability and simplification of maintenance have become important issues.

An example of a conventional electrophotographic apparatus will be described below with reference to the drawings.

FIG. 9 shows a schematic sectional view of a conventional electrophotographic apparatus. In the figure, reference numeral 10 denotes a cylindrical photoreceptor as an electrostatic latent image carrier, which rotates at a constant speed in the direction of arrow a. Reference numeral 12 denotes a charger, which is installed so as to face the photoreceptor 10. Reference numeral 14 denotes an optical section that exposes the photoreceptor 10 to light on the downstream side of the photoreceptor 10 with respect to the charger 12 . A developing device 16 is installed further downstream from the exposure position of the photoreceptor 1o and adjacent to the photoreceptor 10. 18 is copy paper as a transfer material. Reference numeral 20 denotes a paper feed section that supplies the copy paper 18. Reference numeral 22 indicates a transfer charger, and reference numeral 24 indicates a separation charge eliminator, which are installed so as to face the photoreceptor 10 in close proximity to each other. 26 is a conveying section, which is composed of a conveying belt 28, a driving roller 30, a driven roller 32, and a suction section 34,
The copy paper 18 is conveyed. 36 is a supporting and fixing part, which is connected to the conveying part 2.
6 is supported and fixed. A fixing device 38 fixes an image on the copy paper 18.

The operation of the electrophotographic apparatus configured as described above will be described below.

First, the photoreceptor 10 has an optical semiconductor layer such as Se on its surface and rotates at a constant speed in the direction of arrow a. After the surface is uniformly positively charged by the charger 12, the optical part 1
4, exposure is performed to form an electrostatic latent image corresponding to the original. The developing device 16 performs development using negatively charged toner to form a toner image corresponding to the electrostatic latent image on the surface of the photoreceptor 10 . Here, the formation of a toner image on the surface of the photoreceptor 10 is performed by an electrostatic force acting between the positive charge on the surface of the photoreceptor 10 and the negative charge of the toner. The toner image formed on the surface of the photoconductor 10 is transferred to the photoconductor 10 by the paper feeding section 20.
The transfer charger 2 is transferred onto the copy paper 18 that is supplied in synchronization with the rotational speed of the transfer charger 2, which discharges a positive charge.
Step 2 is performed by positively charging the copy paper 18 passing over the transfer charger 22, and the positively charged copy paper 18 attracts negatively charged toner on the surface of the photoreceptor 10 by electrostatic force. . In order to always obtain stable transfer performance, the copy paper 18 must be charged so that the electrostatic force acting between the copy paper 18 and the toner is always greater than the electrostatic force acting between the surface of the photoreceptor 10 and the toner. Just increase the amount. Furthermore, the copy paper 18 charged by the transfer charger 22 not only attracts the toner, but also has an electrostatic force between it and the photoreceptor 10 and is attracted to the photoreceptor 10, so that the toner is not transferred onto the copy paper 18. A need arises to separate the copy paper 18 from the photoreceptor 10 without disturbing the toner image. Therefore, transfer charger 2
Copy paper 1 due to AC discharge of separation static eliminator 24 adjacent to
8, the adhesion force between the copy paper 18 and the photoreceptor 10 is weakened, and the curvature of the cylindrical photoreceptor 10 and the rigidity of the copy paper 18 are used. The copy paper 18 is separated from the photoreceptor 10 by using the force that causes the copy paper 18 to separate from the photoreceptor 10. Now, increasing the amount of discharge TL of the transfer charger 22 in order to increase the amount of charge on the copy paper 18, and increasing the amount of discharge of the separation static eliminator 24 in order to sufficiently eliminate the charge on the copy paper 18, is a direct method. It is known that transfer performance 2 does not improve separation performance, but this is because the transfer charger 22 and the separation static eliminator 24 are installed adjacent to each other.
This is because they have mutually contradictory effects, so they influence each other's effects. For example, if the discharge TL amount is increased in order to increase the static elimination ability of the separation static eliminator 24,
Although the separation performance for separating the copy paper 18 from the photoreceptor 10 is certainly improved, on the other hand, due to the effect of charge removal by the separation charge remover 24, the amount of charge on the copy paper 18 by the transfer charger 22 is removed and reduced. This will reduce transfer performance.

Furthermore, in order to increase the charging ability of the transfer charger 22,
Increasing the amount of discharge increases the amount of charge on the copy paper 18 and certainly improves the transfer performance, but on the other hand, the adhesion force between the copy paper 18 and the photoreceptor 10 also increases, requiring greater charge removal ability and separation. This will reduce performance. Therefore, the amount of discharge of the transfer charger 22 and the separation static eliminator 24 must be controlled to balance the copying performance and separation performance obtained in each discharge state, and it is difficult to set the amount of discharge.

By the way, as described above, the transfer charger 22 and the separation static eliminator 2
4, the toner image on the photoreceptor 10 is transferred to the photoreceptor 1.
The copy paper 18 separated from the copy paper 1
In order to obtain a conveyance force of 8, the copy paper 18 is transferred to the conveyor belt 28.
The sheet is conveyed to a fixing device 38 by a conveying section 26 including a suction section 34 for suctioning the toner image, heated and pressurized, the toner image is fixed thereon, and then the sheet is discharged.

Now, considering the paper path through which the copy paper 18 passes, the copy paper 18 is supplied by the paper feed section 2o, has a toner image transferred to it by the transfer charger 22, and is transferred to the photoreceptor 10 by the separation charge eliminator 24. The sheet is separated from the sheet, transported by the transport section 26, fixed by the fixing device 38, and ejected. The conveyance force for the copy paper 18 on the conveyance section 26 is obtained by suctioning the copy paper 18 from the inside of the conveyance belt 28 by the suction section 34. The conveying force of the copy paper 18 or the curled copy paper 18 is further reduced. Also,
Because the adsorption force of the copy paper 18 to the conveyor belt 28 is not sufficient, most copy paper 18 is is in a free state, and furthermore, since each part is independent, it is not possible to control how the copy paper 18 behaves. Therefore, the copy paper 18 vibrates or an impact force is applied to the copy paper 18, causing the copy paper 18 to
The toner image on the top is disturbed, the copy paper 18 rushes into the transfer charger 222, the separation static eliminator 24, etc., and paper jams occur.
When the copy paper 18 enters the conveyance section 26 and the fixing device 38, it does not enter the copy paper 18 in a specified manner, and paper jams are likely to occur.

Therefore, it is necessary to strictly control the settings of the separation static eliminator 24 and the fixing device 38 so that paper jams of the copy paper 18 are less likely to occur in the conveying section 26 at the junction with the separation static eliminator 24 and the fixing device 38. There is. In addition, in order to increase the area that the suction unit 34 suctions, the suction unit 34 has a large-scale structure,
The transport section 26 also has a thick structure (because it is thick, the transport section 26 is fixed by the support and fixing section 36, and the paper feed section 20 and the fixing device 38 are
(It is impossible to attach and detach the conveyor section 26 as a unit. Also, since the conveyor belt 28 does not have a place where it comes into direct contact with toner, the conveyor belt 28 is generally not cleaned. However, in reality, the conveyor belt 2 is damaged by floating toner, toner falling from the copy paper 18 being conveyed, the photoreceptor 10 being rotated, etc.
8 may get dirty and stain the copy paper 18. (Reference Japan Society for the Promotion of Science; Recording Materials and Photosensitive Materials Gakkai Publishing Center 23-32 et al.) Problems to be Solved by the Invention However, the above configuration has the following problems.

(1) Since the transfer of the toner image to the copy paper 18 is performed by the electrostatic force acting between the charge on the copy paper 18 and the toner, the transfer performance largely depends on the amount of charge on the copy paper 18. The amount of charge on the copy paper 18 varies greatly depending on the physical properties of the copy paper 18, such as its resistance, so it is sufficient if the physical properties of the copy paper 18 can be kept constant at all times. Each type of copy paper 18 has its own unique physical properties.Furthermore, even if copy paper 18 of the same type has the same physical properties, if the environment changes (particularly a change in humidity), the copy paper 18 will change accordingly. Because the physical properties also change, it is not possible to keep the amount of charge on the copy paper 18 constant for various copy papers 18 and under various environments without changing the amount of discharge from the transfer charger 22. However,
Although it is possible to some extent to change the discharge amount of the transfer charger 22 according to the physical properties of the copy paper 18 in order to keep the amount of band TL of the copy paper 18 constant, the structure becomes complicated and expensive. This is not actually done because there are cases where it is difficult to keep up with the situation. As a result, there is a problem in that the transfer performance changes due to changes in the copy paper 18 or environmental conditions, making it impossible to always obtain stable transfer performance.

(2) The separation force that separates the copy paper 18 from the photoreceptor 10 is
Since the separation performance is obtained by the rigidity of the copy paper 18, the separation performance is greatly influenced by the rigidity of the copy paper 18. The rigidity of the copy paper 18 varies depending on the type of copy paper 18. Copy paper 18 with high rigidity is good, but copy paper 18 with low rigidity has a stiffness that is necessary and sufficient for the copy paper 18 to separate from the photoreceptor 10. Unable to obtain separation force, resulting in poor separation. Therefore,
There is a problem in that separation performance changes as the copy paper 18 changes, resulting in poor separation.

(3) The transfer charger 22 and the separation static eliminator 24 are installed adjacent to each other and have contradictory actions, so they influence each other's actions. Therefore, the amount of discharge of the transfer charger 22 and the separation static eliminator 24 must be controlled to balance the transfer performance and separation performance obtained in each discharge state. This balance point depends on the type of copy paper 18.

Since conditions such as changes in environmental conditions also overlap, the range of balance is very narrow, and it is extremely difficult to adjust the discharge amount of the transfer charger 22 and the separation static eliminator to a balance point, and it requires a lot of adjustment skills and The problem is that it requires a lot of adjustment time.

(4) The copy paper 18 on the conveyance unit 26 does not have sufficient conveyance force, so it is rigid such as official postcards (requires a large conveyance force when entering the fixing device 38, and the copy paper 18 is small in shape and conveyed The problem is that the copy paper 18, which can only be conveyed by the belt 28, cannot be conveyed to the fixing device 38.

(5) On the paper path through which the copy paper 18 passes, the copy paper 18
is supplied by the paper feed section 20 and is mostly in a free state until it is fixed by the fixing device 38. Furthermore, since the transfer, separation, and conveyance sections are independent, it is not possible to control the behavior of the copy paper 18, which may cause disturbances in the toner image on the copy paper 18 or the copy paper. There is a problem that 18 paper jams occur.

(6) The conveyance section 26 is fixed by the support fixing section 36, and the conveyance section 26 alone cannot be attached or detached without attaching or detaching anything other than the conveyance section 26. Therefore, for example, when replacing parts such as the conveyance belt 28, The problem is that maintainability is very poor.

In particular, the present invention solves the above-mentioned problems.
In view of the problem that the toner image on the copy paper 8 is easily disturbed and the copy paper 18 is jammed (and maintenance is poor), from the time the copy paper 18 is supplied until it is fixed and ejected,
To provide an electrophotographic device that can always obtain stable paper passing performance without causing disturbance of toner images on copy paper 18 or jamming of copy paper 18, and has improved maintainability such as parts replacement. It is.

Means for Solving the Problems In order to solve the above problems, the electrophotographic apparatus of the present invention includes:
An electrostatic latent image carrier, a charging means for charging the surface of the electrostatic latent image carrier, and an exposure for exposing the surface of the electrostatic latent image carrier charged by the charging means to form an electrostatic latent image. means and
A developing means for visualizing the electrostatic latent image using toner and forming a toner image on the surface of the electrostatic latent image carrier, and a transfer conveyor for transferring the toner image onto a transfer material and conveying the transfer material. The transfer conveyance means directly supports and conveys the transfer material by electrostatic charge, contacts the electrostatic latent image carrier, and transfers the toner image to the transfer material.
A transfer conveyance belt having a semiconductor layer formed of a semiconductor material having a resistivity of 1 Ωcm, a driving means for driving the transfer conveyance belt, and an integrated support for the transfer conveyance belt and the driving means. a transfer conveyance unit constituted by a support means for the transfer conveyance belt, a belt charging means for imparting electric charge to the transfer conveyance belt, and a belt static elimination means for discharging the electric charge held by the transfer conveyance belt; The transfer conveyance belt is configured to have a desired distribution of electric charges held by the transfer conveyance belt by eliminating the electric charge applied to the transfer conveyance belt by the charging means using the belt static elimination means.

According to the above-described structure, the belt charging means is attached to a portion of the transfer conveyance belt made of a semiconductor material having an electrical resistance of 1010 to 1013 Ωcm in the vicinity of the vicinity of the electrostatic latent image carrier and the transfer conveyance belt. By applying an electric charge, the transfer material fed by the transfer material supplying means is transferred by the electrostatic attraction between the polarized charge caused by electrostatic induction of the transfer material and the true charge of the transfer conveyance belt, without directly applying an electric charge to the transfer material fed by the transfer material supply means. The material is attracted and conveyed onto the transfer conveyance belt. The toner transfer is performed by the belt charging means applying an electric charge to the transfer conveyance belt to a polarity opposite to that of the toner on the electrostatic latent image bearing member. That is, the toner is attracted toward the transfer conveyance belt by the electrostatic attraction between the charges on the transfer conveyance belt and the charges on the toner, and is transferred onto the transfer material adsorbed on the transfer conveyance belt.

In addition, since the transfer material does not have a true charge and is attracted onto the transfer conveyance belt by polarized charges, there is no need to remove static electricity from the transfer material when separating the electrostatic latent image carrier from the transfer material, and in addition, the above-mentioned The electrostatic adsorption force between the transfer material and the transfer conveyance belt acts as a forcing force that separates the transfer material from the electrostatic latent image carrier, making it difficult for conventional electrophotographic devices that rely only on the rigidity of the transfer material. The separation of the transfer material is more stable compared to the conventional method.

Further, the present invention integrates various parts that perform the transfer, separation, and conveyance functions of transferring the toner image on the electrostatic latent image carrier to a transfer material, and separating and conveying the transfer material from the electrostatic latent image carrier. By using a transfer conveyance unit, the passage of the transfer material can be simplified, and the behavior of the transfer material on this transfer conveyance unit can be controlled, so that the toner image on the transfer material is not disturbed on this passage. , it is possible to always obtain stable conveyance performance without causing poor conveyance of the transfer material.

Furthermore, in the present invention, the transfer material that has been conveyed while being attracted to the transfer conveyance belt by electrostatic force is separated from the transfer conveyance belt in order to enter the fixing device. Therefore, the charge held by the transfer conveyance belt at the position where the transfer material separates from the transfer conveyance belt is eliminated by the belt static eliminating means, and the adhesion force due to the electrostatic force between the transfer conveyance belt and the transfer material is reduced, so that the transfer material is transferred. It is possible to improve the separation property of the transfer material from the conveyance belt, and to prevent the occurrence of poor conveyance of the transfer material (stable conveyance performance can always be obtained).

EXAMPLE Hereinafter, an electrophotographic apparatus according to an example of the present invention will be described with reference to the drawings.

FIG. 1 shows a schematic cross-sectional view of an electrophotographic apparatus according to an embodiment of the present invention. In the figure, reference numeral 10 denotes a cylindrical photoreceptor as an electrostatic latent image carrier, which rotates at a constant speed in the direction of arrow a. Reference numeral 12 denotes a charger, which is installed so as to face the photoreceptor 10. Reference numeral 14 denotes an optical section that exposes the photoreceptor 10 to light on the downstream side of the photoreceptor 10 with respect to the charger 12 . A developing device 16 is installed further downstream from the exposure position of the photoreceptor 10 and adjacent to the photoreceptor 10 . 18 is copy paper as a transfer material. 2o is a paper feed section, which receives copy paper 18
It is intended to supply 48 is a transfer conveyance unit. Reference numeral 50 denotes a transfer conveyance belt, which is brought into pressure contact with the photoreceptor 10 and driven in one direction. 52 is a drive shaft, and 54 is a separation shaft, which is a driving means for stretching and driving the transfer conveyance belt h50, and the separation shaft 54 eliminates static electricity from the transfer conveyance belt 50.

Reference numeral 56 denotes a transfer shaft, which is located near the position where the photoreceptor 10 and the transfer conveyance belt 50 come into contact (hereinafter referred to as the transfer position). 58 is 2
This is a charger, and is installed so as to sandwich the transfer conveyance belt 50 and face the photoreceptor 10 at the transfer position. 60
61 is a transport board serving as a support means, and 61 is a moving board serving as a support means. 62 is a cleaning section;
Clean the transfer conveyance belt. A support plate 64 is provided on the main body side and supports the transfer conveyance unit 48. A fixing device 38 is installed on the downstream side of the transfer conveyance unit in the path of the transfer paper 18.

The operation of the electrophotographic apparatus configured as described above will be described below with reference to FIGS. 1 to 8.

First, an explanation will be given with reference to FIG.
It rotates at a constant speed in the direction.

After the surface is uniformly positively charged by the charger 12, exposure is performed by the optical section 14 to form an electrostatic latent image corresponding to the original. The developing device 16 performs development using negatively charged toner to form a toner image corresponding to the electrostatic latent image on the surface of the photoreceptor 10. Here, the formation of a toner image on the surface of the photoreceptor 10 is performed by an electrostatic force acting between the positive charge on the surface of the photoreceptor 10 and the negative charge of the toner. The copy paper 18 is fed by the paper feed section 2o toward the transfer conveyance belt 50 in synchronization with the rotational speed of the photoconductor 10, and after reaching the transfer conveyance belt 50, it is transferred to the photoconductor 10 along the transfer conveyance belt 50. It is supplied to the transfer position where the conveyor belt 50 is in contact. The transfer conveyance unit 48 transfers the toner image formed on the surface of the photoconductor 10 to the copy paper 18 that has reached the transfer position, separates the copy paper 18 from the photoconductor 10, and further conveys the copy paper 18. This section explains the principles of transfer, separation, and transportation.

The transfer conveyance belt 50 has a resistivity of IQIO, 1QI3Ω.
It is an endless belt made of a semiconducting material that is c+*, and is stretched by a drive shaft 52 supported by a conveyance board 60 and a moving board 61, a separation shaft 54, and a transfer shaft 56. 56 , and is driven by the driving force of the drive shaft 52 , and positive charge is injected onto the No. 2 charger 58 by discharge of the No. 2 charger 58 . The transfer conveyance belt 50 injected with positive charge forms an electric field due to the electric charge, generates polarization in the copy paper 18 supplied between the transfer conveyance belt 50 and the photoreceptor 10, and transfers and conveys the copy paper 18. Negative charges are polarized on the belt 50 side and positive charges are polarized on the photoreceptor 10 side. Here, the positive polarized charges of the 10 photoreceptors of the copy paper 18 attract the negative charges of the toner on the surface of the photoreceptor 10 by electrostatic force, and the toner image is transferred onto the copy paper 18. In order to always obtain stable transfer performance, the polarization of the copy paper 18 must be adjusted such that the electrostatic force acting between the copy paper 18 and the toner is always greater than the electrostatic force acting between the surface of the photoreceptor 10 and the toner. The amount of charge should be increased.The amount of polarized charge on the copy paper 18 is determined by the resistance value of the copy paper 18,
Regardless of physical properties such as thickness, the amount of charge injected into the transfer conveyance belt 50,! : Copy paper 11: Adhesion of transfer conveyance belt 50,
Regardless of the physical properties of the copy paper 18 (which are always constant), stable transfer performance can always be obtained regardless of the type of copy paper 18 or the environment in which the copy paper 18 is placed. Further, an electrostatic force acts between the photoreceptor 10 and the positive polarization charge of the copy paper 18 on the photoreceptor 10 side, and the copy paper 18 tends to adhere to the photoreceptor 10. Conversely,
Negative polarization charge of 50 examples of transfer conveyance belt of copy paper 18,
Electrostatic force also acts between the positive charge injected into the transfer conveyance belt, and the copy paper 18 tends to adhere to the transfer conveyance belt 50. Therefore, copy paper 18 and transfer conveyance belt 5
It is possible to always make the electrostatic force of 0 greater than the electrostatic force between the copy paper 18 and the photoreceptor 10 by ensuring the close contact between the copy paper IS and the transfer conveyance belt 50.
The copy paper 18 can be separated from the photoreceptor 10 and transported while remaining attached to the transfer transport belt 50. In other words, stable separation performance can always be obtained regardless of the rigidity of the copy paper 18. Furthermore, since the copy paper 18 is electrostatically attracted to the transfer conveyance belt 5o, the behavior of the copy paper 18 on the transfer conveyance belt 50 is as follows.
The copy paper 18 remains in close contact with the transfer conveyance belt 50 and does not float off the transfer conveyance belt 50, and the copy paper 18 does not vibrate on the transfer conveyance belt 50 or apply impact force to the copy paper 18. The toner image on the copy paper 18 will not be disturbed, and no paper jam will occur.Furthermore, since the copy paper 18 is in close contact with the transfer conveyance belt 50, the conveyance force of the copy paper 18 is extremely large. This also makes it possible to convey official postcards, etc. When the copy paper 18 is conveyed from the transfer position to the fixing device 38, it must be separated from the transfer conveyance belt 50 before the fixing device 38. The position where the copy paper 18 is separated from the transfer conveyance belt 50 (
(hereinafter referred to as the separation position), since the transfer conveyance belt 50 is made of semiconductor 11 material, the second charger 5
Compared to the amount of charge at the transfer position when injected by 8,
Since the amount of electric charge at the separation position is reduced due to electrical leakage, the attraction force between the transfer conveyance belt 50 and the copy paper 10 due to electrostatic force is weakened. ■ At the separation position, the transfer conveyance belt 50 is in contact with the separation shaft 54, and since the surface of the separation shaft 54 is conductive and grounded, the transfer conveyance belt 50 is neutralized, and the transfer conveyance belt 50 is connected to the transfer conveyance belt 50. The adsorption force due to the electrostatic force of the copy paper 10 is weak.■ On the downstream side of the separation position, the transfer conveyance belt 50 has a thick curvature (changes) along the separation axis 54, so the rigidity of the copy paper 18 is can be used to obtain the separation force that separates the copy paper 18 from the transfer conveyance belt 50.The above actions (1) to (2) work, and the adsorption force between the transfer conveyance belt 50 and the copy paper 10 becomes weak (as the copying paper 1
Since a separation force acts to separate the copy paper 18 from the transfer conveyance belt 50, the copy paper 18 is naturally separated from the transfer conveyance belt 50 and is conveyed to the fixing device 38. Here, before the separation position, the force with which the transfer conveyance belt 50 attracts the copy paper 18 becomes weaker, but it is still sufficiently strong, so that the behavior of the copy paper 18 and the conveyance force are not affected. and fuser 3
The copy paper 18 conveyed to 8 is fixed and discharged. The transfer conveyance unit 48 also includes a transfer conveyance belt 50 , a drive shaft 52 that stretches and drives the transfer conveyance belt 50 , a separation shaft 54 that stretches the transfer conveyance belt 50 and removes static electricity, and a transfer conveyance belt 50 . Stretch, remove static electricity, transfer conveyance belt 5o
a transfer shaft 56 for ensuring the pressure contact state of the photoconductor 10; a No. 2 charger 58 for injecting charge into the transfer conveyance belt 50; a cleaning section 62 for cleaning the transfer conveyance belt 5o; A push-up portion 63 that pushes up the transfer conveyance unit 48 in order to press the conveyance belt 50 against the photoreceptor 10 , the transfer conveyance belt 50 and the drive shaft 52
A transport substrate 60 that supports the separation shaft 54, the transfer shaft 56, the No. 2 charger 58, the cleaning section 62, and the push-up section 63.
and a movable substrate 61, which transfers the toner image on the photoreceptor 10 onto the copy paper 18, and also transfers the copy paper 18 from the time the copy paper 18 is supplied by the paper feed section 20 until it is fixed by the fixing device 38. It is an integrated unit for transportation, and is supported by a support bearing 112 in a detachable manner on a support plate 64 installed in the main body. When the photoreceptor 10 rotates and performs a copying operation and the copy paper 18 is supplied, the transfer conveyance belt 50 is brought into contact with the photoreceptor 10 by the push-up force received from the main body by the push-up portion 63 to the transfer conveyance unit. 48 is pushed up, and after the copying operation is completed and the copy paper 18 is conveyed, the transfer conveyance belt 50 separates from the photoreceptor 10. This is to keep the photoreceptor 10 and the transfer conveyance belt 50 as far apart as possible, since if the transfer conveyance belt 50 is in constant contact with the photoconductor 10, the surface of the photoconductor 10 may change in quality due to mechanical damage caused by pressing. It is. Furthermore, when removing the transfer conveyance unit 48 from the support plate 64 that supports the main body, it is possible to open the photoreceptor 10, the developing device 16, etc. in an alligator method around the fulcrum 100, and then remove the transfer conveyance unit 48. can.

Next, a detailed explanation of each part will be given with reference to FIGS. 1 to 8.

First, regarding the support method of supporting the transfer conveyance unit 48 with the support plate 64, there is shown a schematic cross-sectional view in FIG. 1, a detailed view of the transfer conveyance unit 48 in FIG. 2, and FIG. 3.

This will be explained with reference to a detailed view of the support portion of the transfer conveyance unit 48 in FIG. Here, the transfer conveyance unit 48 includes a support bearing 11 to support the separation shaft 58 to the moving substrate 61.
This support bearing 112 has a flange portion and an H-cut portion having an H-shaped outer circumference. The support plate 64 is provided with the H of the support bearing 112.
A hole with the same diameter as the long side of the cut part and a groove having a width through which the long side passes but not the short side are cut. Further, the support bearing 112 is attached obliquely to the moving board 61. Here, with the alligator opened (dotted chain line in FIG. 1), the short width part of the support bearing 112 can be inserted into the support plate 64 in the direction of the arrow while tilting the transfer conveyance unit 48. After finishing, transfer transfer unit 48 centering on the hole of support plate 64 (concentric with support bearing 112).
When the drive shaft 52 side is rotated in the direction of pushing down, the groove of the support plate 64 and the H-cut part of the support bearing 112 become diagonal, and the support bearing 112 cannot be removed even if it is pushed up in the opposite direction of the arrow. , the transfer conveyance unit 48 is transferred to the support plate 64.
The support can be fixed. If the transfer conveyance unit 48 is to be removed here, the process may be performed in the reverse order. By supporting and fixing the transfer conveyance unit 48 as described above, the transfer conveyance unit 48 can be easily attached and detached, and can be easily and securely attached.

Next, regarding the method of attaching the No. 2 charger 58 and the No. 2 charger 58 to the transfer conveyance unit 48, the schematic sectional view in FIG. 1, the detailed view of the transfer conveyance unit 48 in FIG. 2, and the method shown in FIG. This will be explained with reference to a cross-sectional view of the No. 2 charger 58 when it is installed.

The No. 2 charger 58 is a charger that injects positive charge into the transfer conveyance belt 50, and includes a wire 160 for corona discharge, block (1) 162, block (2) 164, and wire 160 for fixing the wire 160. A positioning spring 170 pushes up the house 166 vertically upward on the block (1) 162 side and grounds the house 166. Further, a block receiver 178 for positioning the block (2) 164 is installed on the transfer board 6o. Here, the No. 2 charger 58 can be easily attached and detached from the transfer conveyance unit 48 so that cleaning can be easily performed when the wire 160 becomes dirty. When removing the No. 2 charger 58 from the installed state (Fig. 7), first remove the block (1) 162.
Push down in the direction of arrow C.

Then, the positioning spring 170 contracts, the removal stop formed by the transport board 60 and the house 166 comes off, and the No. 2 charger 58 can be pulled out in the direction of arrow d.
8 can be removed from the transfer conveyance unit 48.

However, even if the No. 2 charger 58 is pulled in the direction of arrow d without pushing down the block (1) 162 in the direction of arrow C, it cannot be pulled out due to the stopper. Next, the uninstalled state (
When attaching the No. 2 charger 58 from FIG. , enters the hole made in the block receiver 178 attached to the transfer board 60, and blocks (2)
164 is positioned vertically and horizontally. If you insert more,
It is pushed up vertically by the positioning spring 170,
The removal stop provided in the house 166 of the No. 2 charger 58 is engaged, and the installation is completed. Although the second charger 58 can be easily attached and detached from the transfer conveyance unit 48 by a so-called two-wheel slide attachment method, it is firmly attached when attached.

Next, regarding the cleaning section 62 and the method of attaching the cleaning section 62 to the transfer conveyance unit 48, the schematic sectional view in FIG. 1, the detailed view of the transfer conveyance unit 48 in FIG. 2, and the transfer conveyance unit in FIG. The explanation will be given with reference to a schematic cross-sectional view of the transfer unit 48 and a side view of the transfer conveyance unit 48 in FIG.

The cleaning section 62 is for cleaning foreign matter such as toner on the transfer conveyance belt 50, and includes a blade 130 that directly cleans the transfer conveyance belt 50 and a cleaning substrate 132 that holds the blade 130 so as to be able to move toward and away from the transfer conveyance belt 50. and a blade lever 134 that moves in conjunction with the movement of the blade 130 toward and away from the transfer conveyance belt 50.
and a spring 1 that constantly applies a pressing force to the blade lever 134 so that the blade 130 comes into pressure contact with the transfer conveyance belt 50.
36, a discharge toner box 138 that stores the toner cleaned by the blade 130, and a pad 140 that prevents the toner from scattering outside the cleaning section 62.
A back pad 142 that is in contact with the back surface of the transfer conveyance belt (the side opposite to the blade 130) and attached to the conveyance substrate 60; It is configured to face the back plate 144 via the transfer conveyance belt. Here, the blade 130, which receives the pressing force constantly applied by the spring 136 via the blade lever 134, is constantly pressed against the transfer conveyance belt 50 and cleans the transfer conveyance belt 50. Here, in order to prevent the blade 130 from biting into the transfer conveyance belt 50 too much, the amount of biting is controlled by a stopper constituted by a blade lever 134 and a cleaning board 132, so that the blade 130 does not bite into the transfer conveyance belt 50 more than a specified amount. The toner cleaned by the blade 130 falls into a discharge toner box 138 provided below the blade 130 and is stored therein. The waste toner box 138 can be slid in and out of the cleaning board 132, and when the waste toner box 138 is full of toner, etc., the cleaning board 132 is removed and the waste toner box 138 and the waste toner box 138 are removed after discarding the toner. All that is required is to attach a new waste toner box 138 to the cleaning board 132 again. Not all of the toner cleaned by the blade 130 instantly falls into the discharge toner box 138 (the blade 130
It floats nearby and scatters outside. Therefore, by closing the gap between the cleaning section 62 and the outside with the pad 140, the toner is prevented from scattering to the outside. Further, the back pad 142 is connected to the transfer conveyance belt 50.
This presses the transfer conveyance belt 50 from the back side toward the blade 130, which has the effect of improving cleaning performance and prevents abnormal noises generated by the sliding movement of the blade 130 and the transfer conveyance belt 50. The back plate 144 presses the transfer conveyance belt 50 toward the blade 130 from the back side of the transfer conveyance belt 50 immediately upstream of the pressure contact position of the blade 130, so that the back plate 144 presses the transfer conveyance belt 50 against the blade 130 at the pressure contact position of the blade 130. The cleaning performance is improved by increasing the drag force. The cleaning section 62 can be easily attached and detached from the transfer conveyance unit 48 for purposes such as replacing the blade 130. First, the state in which the cleaning section 62 is attached (
In order to remove the cleaning section 62 from the transfer substrate 60 (FIG. 6), the moving substrate 61 is rotated in the direction of the arrow g, and then the cleaning section 62 is moved in the direction of the arrow i. When mounting, the cleaning board 1 is attached to the hook provided on the transport board 60 with the moving board 61 rotated in the direction of arrow g with respect to the transport board 60.
Cleaning part 6 by fitting into the groove provided in 32
2 in the direction opposite to the arrow i, and then insert the
After that, the movable substrate 61 is rotated in the opposite direction of the arrow g with respect to the transfer substrate 60 to prevent removal. In this way, the cleaning section 62 can be easily attached and detached from the transfer conveyance unit 48.

Next, details of the push-up portion 63 will be explained with reference to a schematic sectional view in FIG. 1, a detailed view of the transfer conveyance unit 48 in FIG. 2, and a schematic diagram of the push-up portion 63 of the main body in FIG.

In order to prevent deterioration of the surface of the photoreceptor 10, when the photoreceptor 10 rotates to perform a copying operation and copy paper 18 is supplied, the push-up portion 63 pushes up the transfer conveyance unit 48, and causes the transfer conveyance belt 50 to touch the photoreceptor 10. After the copying operation is completed and the copy paper 18 is conveyed, the transfer conveyance belt 50 is moved away from the photoreceptor 10 . The push-up section 63 is provided with an electromagnetic plunger 182 installed in the main body, a push-up lever 184 that rotates in conjunction with the electromagnetic plunger 182, a push-up spring 186 that constantly pushes up the transfer transport unit 48, and the transfer transport unit 48. , a push-up plate (1) that receives the force of the push-up lever 184
188 and a push-up plate (2) 190 that receives the force of the push-up spring 186. Here, when starting a copying operation, a signal is input to the electromagnetic plunger 182, and the electromagnetic plunger 182 is turned on. In conjunction with this, the push-up lever 184 rotates, transmits its rotational force to the push-up plate (1) 188, and transfers and conveys unit 48
is pushed up, and the transfer conveyance belt 50 is positioned at the push-up position where it is brought into pressure contact with the photoreceptor 10. Push-up spring 18
6 applies the pushing up force of the transfer conveyance unit 48 to the pushing up plate (2) 190, but the pushing up spring 186
The push-up force caused by the push-up spring 186 is a push-up force that balances the weight of the transfer conveyance unit 48.
Although the transfer conveyance unit 48 cannot be pushed up by the push-up force alone, there is an advantage that the push-up force by the push-up lever 184 can be reduced. Furthermore, compared to the stroke required to push up the transfer conveyance unit 48 to the push-up position, the stroke that can be pushed up with push-up/<-184 is sufficiently large. This is done to ensure that the transfer and conveyance unit 48 can always be pushed up completely even if a dimensional error occurs in the parts. The stroke difference that occurs here is absorbed by the push-up plate (1) 188, which is an elastic body, so that the transfer conveyance unit 48 can always be reliably pushed up to the push-up position.

Next, regarding the procedure for replacing the transfer conveyance belt 50,
This will be explained with reference to a schematic cross-sectional view in FIG. 1, a detailed view of the transfer conveyance unit 48 in FIG. 2, and a side view of the transfer conveyance unit 48 in FIG. Here, the transfer conveyance belt 50 is normally used as shown in FIGS. 1 and 2.

As shown in FIG. 6, a drive shaft 52, a separation shaft 54, a transfer shaft 56
However, it may need to be replaced at the end of its service life. Here, when the movable substrate 61 is rotated in the direction of arrow g with respect to the transfer substrate 60, the retainer for removing the cleaning section 62 is released and the cleaning section 62 is removed from the transfer transfer unit 48.
In addition, it is possible to remove the tension on the transfer conveyance belt 50 that has been subjected to tension until now.Then, the transfer conveyance belt 50 that has no longer tension can be easily removed from the transfer conveyance unit 48. On the other hand, when attaching the transfer conveyance belt 50 to the transfer conveyance unit 48, the transfer conveyance unit 48 is inserted into the transfer conveyance belt 50 while the movable substrate is rotated in the direction of arrow g with respect to the conveyance substrate 60. After that, the movable substrate 61 is rotated in the direction opposite to the arrow g with respect to the transfer substrate 6o, and tension is applied to the transfer conveyance belt 50.The tension applied to the transfer conveyance belt 50 in this way is This is done by rotating the movable substrate 61 with respect to the transfer conveyance unit 48, so that the transfer conveyance belt 50 can be easily attached and detached from the transfer conveyance unit 48.

As described above, according to this embodiment, the photoreceptor 10, the charger 12 for charging the surface of the photoreceptor 10, and the surface of the photoreceptor 10 charged by the charger 12 are exposed to light to form an electrostatic latent image. an optical section 14 for visualizing the electrostatic latent image using toner and forming a toner image on the surface of the photoreceptor 10; 1
8, the transfer conveying means directly supports and conveys the copy paper 18 by electrostatic charge, contacts the photoreceptor 10, and transfers the toner image onto the copy paper 18. A transfer conveyance belt 50 having a semiconductor layer made of a semiconductor material having a resistivity of 1010 to 1013 Ωcm, a drive shaft 52 for stretching and driving the transfer conveyance belt 50, a separation shaft 54, and the transfer conveyance belt 5.
0, the drive shaft 52, and the separation shaft 54.
and a transfer conveyance unit 48 having a movable substrate 61 and a No. 2 charger 5 for applying electric charge to the transfer conveyance belt 50.
8, and the transfer conveyance unit 48 is configured to be detachable, so that the copy paper 18
The copy paper 1 is transferred with the toner image on the surface of the photoconductor 10 after it is supplied by the paper feed section 20 until it is fixed by the fixing device 38, separated from the photoconductor 10, and transported.
The paper passing path of 8 is constituted by the transfer conveyance unit 48 which is an integrated unit, and the copy paper 18 is
Since the copy paper 18 is attracted to the transfer conveyance belt 50 by electrostatic force on the paper passing path, it is possible to control the behavior of the copy paper 18 on the paper passing path, thereby preventing disturbances in the toner image on the copy paper 18 and preventing the copy paper from being disturbed. 18 without causing transportation defects, etc.
Stable paper passing performance can always be obtained. Further, since the integrated transfer conveyance unit 48 can be made compact, the transfer conveyance unit 48 can be easily attached and detached, and maintenance efficiency such as parts replacement can be improved.

Note that the transfer conveyance belt 50 has a resistivity of 10IO to 10
Although the endless belt was made of a semiconductor material with a resistance of 13 Ωcm, it is desirable that the surface of the belt has low surface roughness, low coefficient of friction, and excellent wear resistance in order to clean adhered toner.

Therefore, the base material on the No. 2 charger 58 side is IQIQ ~ 1013Ω.
cm, and the surface layer of the 10 photoreceptors is made of a material with low surface roughness, low coefficient of friction, excellent wear resistance, and higher resistivity than the base material, such as fluororesin or nylon resin. It is also possible to form a multilayer structure, and in such a case, the cleaning performance of the transfer conveyance belt 50 can be reliably improved. In addition, it is desirable to have appropriate elasticity so that strong wrinkles do not occur during drive rotation by the drive shaft 52 or the like. If the rigidity is too strong and wrinkles occur, it may not be possible to maintain adhesion with the copy '&18 at the wrinkled portion.Furthermore, due to the running performance of the transfer conveyance belt 50, it is difficult to prevent meandering. In order to prevent this, it is more preferable that the transfer conveyance belt 50 has appropriate elasticity.

The drive shaft 52 must transmit the driving force transmitted from the drive transmission section 104 to the transfer conveyance belt 50 and drive the transfer conveyance belt 50. The driving force is transmitted through the drive shaft 52.
This is done by the frictional force between the front surface and the back surface of the transfer conveyance belt 50.

Here, in order to perform sufficient transmission, it is desirable that the surface of the drive shaft 52 has a large friction coefficient. However, the drive shaft 52
If the friction coefficient is large, the transfer conveyance belt 50 is likely to meander when a meandering force is generated. Therefore, if possible, the friction coefficient is large (,
It is desirable that the surface of the drive shaft 52 has so-called roll marks, which have a small coefficient of friction in the meandering direction. In addition, in order to make it difficult to generate meandering force as much as possible, the drive shaft 52
It is also possible to use a drum shape in which the shaft diameters at both ends are smaller than the central shaft diameter, or to use a drive shaft 52 having a plurality of drum shapes.

At least the surface of the separation shaft 54 is made of a conductive material,
Electricity is removed from the transfer conveyance belt 50 at a portion that is grounded by an earth plate spring 114 and is in contact with the transfer conveyance belt 50. Further, since the portion in contact with the transfer conveyance belt 50 is also the separation position where the copy paper 18 is separated from the transfer conveyance belt, the smaller the radius of curvature of the separation shaft 54, that is, the diameter of the separation shaft 54, the more the copy paper is removed from the transfer conveyance belt 50. However, if the diameter of the separation shaft 54 is 20 mm or less, preferably 16 mm or less, more reliable separation can be ensured.

The transfer shaft 56 is in contact with the transfer conveyance belt 5o immediately upstream of the transfer position where the transfer conveyance belt 50 and the photoreceptor 10 are in contact. The surface of the transfer shaft 56 is made of a conductive material and is grounded, so that the transfer conveyance belt 50 is neutralized immediately upstream of the transfer position, and the toner on the surface of the photoreceptor 10 is transferred to the photoreceptor lO and the copy paper 18. The transfer conveyor belt 50
This prevents so-called toner flying, which is flying toward the charge on the copy paper 18. Further, the transfer conveyance belt 50 is connected to the photoreceptor 10.
, increasing the pressing area and pressing force between the transfer conveyance belt 50 and the photoreceptor 10, so that the copy paper 18 is pressed against the transfer conveyance belt 50.
This is used to ensure close contact between the copy paper 18 and the transfer conveyance belt 50 when the copy paper 18 is supplied between the photoreceptor 10 and the copy paper 18 . Although the transfer shaft 56 is installed upstream of the transfer position in order to ensure close contact between the copy paper 18 and the transfer conveyance belt 50, the same close contact can also be achieved by installing the transfer shaft 56 instead on the downstream side of the transfer position. It is possible to ensure sex. Furthermore, by installing it on both the upstream and downstream sides, the adhesion can be further increased.

In order to easily attach and detach the No. 2 charger 58 from the transfer conveyance unit 48, a two-wheel chair sliding type is used, but it is not necessarily necessary to attach and detach it in this manner. In addition, No. 2 charger 5
Since there is a transfer conveyance belt 50 on top of 8, the second charger 5
No. 8 is less likely to get dirty, so the No. 2 charger 58 may be completely fixed to the transfer conveyance unit 48.

Further, although the transfer conveyance belt 50 is cleaned by the blade 130 here, the blade 130 is not necessarily used to clean the transfer conveyance belt 50.
It does not have to be the same, and any material may be used as long as it cleans the transfer conveyance belt 50 well. For example, blade 1
In addition to 30, there are fur brushes and woven fabrics. Further, although the blade 130 is pressed by a spring 136 and a stopper is attached to prevent digging, it is not necessary to use the spring 136 and a stopper (although a completely fixed type can be cleaned sufficiently). Although the method of attaching and detaching the discharge toner box 138 is a sliding type, the discharge toner box 1
This is to facilitate the processing of the toner accumulated in 38, and it is not necessarily necessary to attach or detach it. Also, the sliding attachment/detachment method does not necessarily have to be a sliding type.
Other methods such as a built-in type may be used as long as the discharge toner box 138 can be easily attached and detached. The back pad 142 has the effect of improving cleaning performance and preventing abnormal noise, and is made of a material that does not have a very large elastic modulus, such as foamed sponge, and the back pad 142 is in contact with the back surface of the transfer conveyance belt 50 and slides thereon. If the surface is made of a material with a small coefficient of friction and good wear resistance, such as fluororesin, the sliding resistance with the transfer conveyance belt 50 will be small (very good, and the effect of leaning performance and noise prevention can be obtained). However, it is not necessary because good cleaning performance can be obtained even without the back plate 142.The back plate 144 has the effect of improving cleaning performance, and is especially effective when the back surface of the transfer conveyance belt 50 contacts and slides. If the surface has a small coefficient of friction and has excellent wear resistance, such as a surface made of fluororesin, the sliding resistance with the transfer conveyance belt 50 will be small and very good leaning performance can be obtained. , it is not necessary because good leaning performance can be obtained even without the back plate 144.The cleaning section 62 fits the groove provided on the cleaning substrate 132 into the hook provided on the transfer substrate 60, and cleans the moving substrate 144. 61 is rotated to prevent the cleaning section 62 from coming off and is easily attached and detached from the transfer conveyance unit 48, but it is not always necessary to attach the cleaning section 62 to the transfer conveyance unit 48 in this way. No, any method that allows for easy attachment and detachment may be used.

Further, the earth coil spring 110 is for earthing the transfer shaft 56, and does not necessarily have to be the earth coil spring 110 as long as it earths the transfer shaft 56.

Further, the ground plate spring 114 is for grounding the separation shaft 54, and does not necessarily need to be the ground plate spring 114 as long as it is used to ground the separation shaft 54.

Furthermore, the meandering prevention roller 154 is provided to suppress meandering when the transfer conveyance belt 50 meanders, but it is not necessarily necessary.

Effects of the Invention As described above, the present invention includes an electrostatic latent image carrier, a charging means for charging the surface of the electrostatic latent image carrier, and a method for exposing the surface of the electrostatic latent image carrier charged by the charging means. , an exposure means for forming an electrostatic latent image, a developing means for visualizing the electrostatic latent image using toner and forming a toner image on the surface of the electrostatic latent image carrier, and transferring the toner image. The transfer conveyance means directly supports and conveys the transfer material using static electricity, contacts the electrostatic latent image carrier, and transfers the toner image. A transfer conveyance belt having a semiconductor layer formed of a semiconductor material having a resistivity of at least 1010 to 1013 Ωcm for transferring onto a material, a driving means for driving the transfer conveyance belt, and a transfer conveyance belt and a drive. a transfer conveyance unit constituted by a support means for integrally supporting the transfer conveyance belt; a belt charging means for imparting electric charge to the transfer conveyance belt; and a belt for neutralizing the electric charge held by the transfer conveyance belt. By having a structure in which the charge applied to the transfer conveyance belt by the belt charging means is eliminated by the belt charge eliminating means, and the distribution of the charges held by the transfer conveyance belt becomes a desired distribution, The transport path of the transfer material from the time the transfer material is supplied until it is fixed can be configured with an integrated unit called the transfer transport unit, which transfers the toner image to the transfer material and transfers the electrostatic latent image on the transfer material. This prevents disturbances in the toner image on the transfer material and poor conveyance of the transfer material during the transfer material transport path, such as separation from the carrier, transport of the transfer material, and separation of the transfer material from the transfer transport belt. (It is possible to obtain the effect that stable conveyance performance of the transfer material can be obtained at all times.

In addition, by configuring the transfer material transport path with an integrated unit called the transfer transport unit, it is possible to make the apparatus compact, and it is possible to obtain the effect that maintenance such as parts replacement is simplified.

[Brief explanation of the drawing]

FIG. 1 is a schematic sectional view of an electrophotographic apparatus according to an embodiment of the present invention, FIG. 2 is a detailed view of the transfer conveyance unit of this embodiment, and FIGS. 3 and 4 are details of the support portion of the transfer conveyance unit. Similarly, FIG. 5 is a schematic sectional view of the transfer conveyance unit, and FIG.
The figure is the same side view of the transfer conveyance unit, and Figure 7 is the same (
The cross-sectional view of the No. 2 charger when the device is installed, and FIG. 8 are the same (a schematic diagram of the push-up part, and FIG. 9 is a schematic cross-sectional view of an example of a conventional electrophotographic device. 10... Photoreceptor , 12... Charger, 1
4...Optical section, 16...Developer, 18
... Copy paper, 20 ... Paper feed section, 22.
...Transfer charger, 24... Separation static eliminator,
26... Conveyance section, 28... Group/conveyance belt, 3
0... Drive roller, 32... Driven roller, 34 Old... Suction section, 36... Support fixing section, 38... Fixing device, 48 ...Transfer conveyance unit, 50...Transfer conveyance belt, 52...
... Drive shaft, 54 ... Separation shaft, 56 ...
...Transfer shaft, 58...2nd charger, 60...
Group/transport board, 61...Moving board, 62...
...Cleaning part, 63...Pushing part,
64... Support board, 100... Fulcrum,
110... Earth coil spring, 112...
... Support bearing, 114 ... Earth plate spring, 13
0...Blade, 132...Cleaning board, 134...Blade lever, 136
... Spring, 138 ... Discharge toner box, 140 ... Pad, 142 ... Back pad, 144 ... Back plate, 15
4...Meandering prevention roller, 160...Wire, 162...Block (1), 164...
...Block C2), 166...House, 170...Positioning spring, 178...
・Block receiver, 182... Electromagnetic plunger, 184... Push-up lever, 186...
...Push-up spring, 188...Push-up plate (1
), 190...Pushing plate (2). Name of agent: Patent attorney Toshio Nakao and 1 other person 10-
Sensitive body, 1 la-m-transfer conveyance unit 50-transfer slow-speed belt 52-, adjustment shaft %---dividing shaft 56-transfer shaft frame--No. 2 1F! Electrical appliances 60 - Unsent bottle 61 - Stirring base 11 skin 14 plates 112 - Supporting particle Fig. 4 142 - M - Bag pad Fig. 5 14 - Bag plate woman
God 5 Ya ≦* N-f instep sound b taz- to gutter plunge Y- 186---↑Mashinigeba base No. 8121

Claims (2)

[Claims] (1) An electrostatic latent image carrier, a charging means for charging the surface of the electrostatic latent image carrier, and the surface of the electrostatic latent image carrier charged by the charging means is exposed to light to form an electrostatic latent image. an exposure means for forming the electrostatic latent image, a developing means for visualizing the electrostatic latent image using toner and forming a toner image on the surface of the electrostatic latent image carrier, and transferring the toner image to a transfer material. and a transfer conveyance means for conveying the transfer material, the transfer conveyance means directly supporting the transfer material by electrostatic force,
at least 10^1^0 for conveying, contacting the electrostatic latent image carrier, and transferring the toner image to the transfer material.
A transfer conveyance belt having a semiconductor layer formed of a semiconductor material having a resistivity of ~10^1^3 Ωcm, a drive means for driving the transfer conveyance belt, and the transfer conveyance belt and the drive means. a transfer conveyance unit constituted by a support means for integrally supporting the transfer conveyance belt, a belt charging means for applying electric charge to the transfer conveyance belt, and a belt for neutralizing the electric charge held by the transfer conveyance belt. a static eliminator, the belt static eliminator removes the electric charge applied to the transfer conveyance belt by the belt charging means, so that the distribution of electric charges held by the transfer conveyance belt becomes a desired distribution. An electrophotographic device characterized by: (2) The belt static elimination means is at least one circumferential roller having a conductive surface and whose surface is grounded, and is in contact with the semiconductor layer of the transfer conveyance belt, and is in contact with the semiconductor layer of the transfer conveyance belt. An electrophotographic apparatus according to claim 1, wherein the electrophotographic apparatus is configured to rotate at substantially the same speed.