JP2001100517A - Device for positionally adjusting and fixing plate member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To accurately position and fix a developing blade a the specified target position of a virtual developing sleeve without causing deflection in a developing container by the pressing of a driver for tightening machine screws in the case of fixing the developing blade in the developing container even when the developing blade and other component members respectively have dispersion in production. SOLUTION: Thick supporting parts 23a and 23b are formed on the same line as the advance/retreat direction of the drivers 20a and 20b for tightening a machine screws. In the case of positioning the developing container 2 and screwing the developing blade 1 in the developing container 2 through machine screws, the backup members 24a and 24b of the backup mechanisms 10a and 10b are made to abut on the supporting parts 23a and 23b and screwed through the machine screw.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plate-like member which is a developer regulating member used for a developing device of an image forming apparatus such as a copying machine or a printer and which regulates a developer, and to a cleaning device. The present invention relates to a plate member position adjusting and fixing device for fixing a plate member which is a cleaning member for removing a developer to a developing container and a cleaning container, respectively.

[0002]

2. Description of the Related Art FIG. 13 shows an example of a conventional image forming apparatus, and FIG. 14 shows an example of a developing device used in the image forming apparatus.

In FIG. 13, a photosensitive drum 101 as a cylindrical member is disposed substantially at the center of the apparatus main body. The photosensitive drum 101 rotates in a direction indicated by an arrow A in FIG.
02 is uniformly charged, and an electrostatic latent image is formed on its surface by the laser beam 103 from the exposure unit.

The electrostatic latent image is developed by the developing device 104 and is visualized as a toner image. The developing device 104 is disposed in proximity to the photosensitive drum 101, and is configured to be detachable from the image forming apparatus main body as a developing cartridge. In this example, so-called reversal development for forming a toner image on the exposed portion is performed.

The visualized toner image on the photosensitive drum 101 is transferred by a transfer roller 109 to a paper 11 serving as a recording medium.
The transfer residual toner which has been transferred to the photosensitive drum 101 and is not transferred onto the photosensitive drum 101 is scraped off by a cleaning blade 110 which is a plate-like member, is stored in a waste toner container (cleaning container) 111, and is cleaned. Reference numeral 101 repeats the above operation to form an image.

On the other hand, the paper 113 on which the toner image has been transferred is subjected to a fixing process by the fixing device 112, and is discharged out of the device to complete the printing operation.

Referring to FIG. 14, a developing device 104 includes a developing container 114 containing a non-magnetic toner 108 as a one-component developer, and an opening extending in the longitudinal direction in the developing container 114 has a photosensitive member. A developing sleeve 105 as a cylindrical member opposed to the drum 101 is rotatably arranged, and the electrostatic latent image on the photosensitive drum 101 is developed and visualized by the non-magnetic toner 108 carried on the developing sleeve 105. .

[0008] The developing sleeve 105 protrudes into the developing container 114 at a substantially right half circumferential surface shown in the drawing at the opening of the developing container 114, and is laterally provided with a substantially left half circumferential surface exposed outside the developing container 114. . The surface of the developing sleeve 105 exposed outside the developing container 114 is opposed to the photosensitive drum 101 located on the left side of the developing device 104 with a small gap.
The developing sleeve 105 is driven to rotate in the direction of arrow B. The surface of the developing sleeve 105 has appropriate unevenness. The unevenness increases the probability of rubbing of the developing sleeve 105 with the non-magnetic toner 108 and increases the non-magnetic property. The conveyance of the toner 108 is favorably performed.

An elastic regulating blade (developing blade), which is a plate-shaped member, is located above the developing sleeve 105.
107 is provided to be supported by the holding sheet metal 115,
The vicinity of the free end of the elastic regulating blade 107 is in contact with the outer peripheral surface of the developing sleeve 105 in surface contact.

The method of contacting the elastic regulating blade 107 with the developing sleeve 105 is a so-called counter (reverse) direction in which the leading end side of the contacting portion is located upstream of the rotating direction of the developing sleeve 105. As shown in FIG. 15, the contact angle θ which is a set contact point between the developing sleeve 105 and the elastic regulating blade 107 and the elastic regulating blade 107
Is set only by assembling such that the virtual penetration length (hereinafter referred to as “penetration amount”) δ on the edge surface of the elastic regulating blade 107 is the same in the longitudinal direction.

The elasticity regulating blade 107 has a conductive layer via a rubber elastic layer at least at a portion in contact with the developing sleeve 105. As the rubber elastic layer, urethane rubber or silicon rubber having a rebound resilience of 20% or more is used. Some of the conductive layers are made of SUS or phosphor bronze thin metal sheet having spring elasticity.
There is a cold rolled steel sheet having a thickness of about 2 mm in which silicon rubber is integrally formed.

Further, in FIG. 14, an elastic roller 106 as a developer replenishing member is brought into contact with the contact portion of the elastic regulating blade 107 with the surface of the developing sleeve 105 on the upstream side in the rotation direction of the developing sleeve. Supported as possible.

In the developing device 104 having the above structure, the non-magnetic toner 10 in the developing container 114 during the developing operation is
8 is sent toward the elastic roller 106 with the rotation of the stirring member 119 in the direction of arrow C. And the non-magnetic toner 1
Reference numeral 08 denotes a non-magnetic toner which is conveyed to the vicinity of the developing sleeve 105 by rotating the elastic roller 106 in the direction of arrow D in the drawing, and is carried on the elastic roller 106 at a contact portion between the developing sleeve 105 and the elastic roller 106. 1
08 is frictionally charged by being rubbed with the developing sleeve 105 and adheres to the developing sleeve 105. Thereafter, the non-magnetic toner 108 is moved to the arrow B on the developing sleeve 105.
Is sent under the pressure of the elastic regulating blade 107 with the rotation of the photosensitive drum 10 and receives a proper tribo (amount of frictional charge) to form a thin layer on the developing sleeve 105.
The developer is conveyed to a developing unit which is a part facing the developing unit 1 and is subjected to development.

Undeveloped toner not consumed in the developing section is collected from the lower portion of the developing sleeve 105 as the developing sleeve 105 rotates. A blowout prevention sheet 120 is provided in the collection portion. The blowout prevention sheet 120 allows the undeveloped toner to pass into the developing container 114, and the nonmagnetic toner 108 in the developing container 114 To prevent leakage from the bottom of the

Undeveloped toner collected from the developing sleeve 105 is peeled off from the surface of the developing sleeve 105 at a contact portion between the elastic roller 106 and the developing sleeve 105. Most of the stripped toner is conveyed along with the rotation of the elastic roller 106 and mixes with the non-magnetic toner 108 in the developing container 114, whereby the charge of the toner is dispersed. At the same time, new toner 108 is supplied onto the developing sleeve 105 by the rotation of the elastic roller 106, and the above operation is repeated.

However, the latent image on the photosensitive drum 101 is
The toner image is developed by an electric field generated by an AC voltage (developing AC bias) obtained by superimposing a direct current applied between the developing sleeve 105 and the photosensitive drum 101 by the power supply 121 and is visualized as a toner image.

In an electrophotographic image forming apparatus for forming an image using an electrophotographic process, a cleaning device for removing the developer remaining on the photosensitive drum 101 after transfer is a blade-shaped cleaning device as shown in FIG. Cleaning blade 11 which is a plate-like member made of rubber
There is a cleaning device 130 with zero. The cleaning device 130 scrapes off the residual developer on the photosensitive drum 101 by bringing the cleaning blade 110 into contact with the photosensitive drum 101 from the counter direction and rotating the photosensitive drum 101 in the direction of arrow A.

At this time, as shown in FIG. 17, the contact state between the photosensitive drum 101 and the cleaning blade 110 is set such that the contact pressure between the photosensitive drum 101 and the cleaning blade 110 is uniform in the longitudinal direction. Are assembled in such a manner that the contact angle θ which becomes the contact point of the cleaning member 110 and the virtual penetration length (hereinafter referred to as “a penetration amount”) δ at the edge surface of the cleaning blade 110 are the same in the longitudinal direction of the cleaning member 110. Was only set. As shown in FIG. 16, the cleaning blade 110 is supported by a support member 123 supported by a waste toner container 122 that stores the residual developer, and a squeeze sheet 124 that collects the scraped residual developer is provided. It is attached to the waste toner container 122.

[0019]

However, according to the above conventional example, the following problems are raised in the developing and cleaning processes.

In recent years, as the LBP has been improved in image quality, definition, and color, it has become essential to use non-magnetic one-component toner of spherical fine particles purified by a polymerization method. Unlike the conventional magnetic toner, it is essential that the non-magnetic toner be supplied to the photosensitive drum not by magnetic attraction but by frictional charging.

Further, since the non-magnetic one-component toner is spherical fine particles, a uniform thin layer coating is required on the developing sleeve. Even when trying to fix the sheet metal to the developing container, when the sheet metal is fixed to the developing container, the sheet metal is fixed in a state where the hollow developing container is bent due to the pressing of the screw tightener, As a result, it is not possible to obtain the set amount of intrusion, so that the coating thickness of the non-magnetic one-component toner on the developing sleeve varies. For example, FIG.
As shown in FIG. 8, a difference in the tip portion in the longitudinal direction of the blade (amount of bow: ε) generated during molding as a single blade.
For this reason, an error occurs in the amount of penetration after assembly.

The problem of the amount of intrusion is common to the cleaning blade fixed to the waste toner container.
Furthermore, since the non-magnetic one-component toner is spherical fine particles, it is very difficult to recover the toner with a cleaning blade.

To further explain the problem of the amount of intrusion, for example, in the developing process, if the amount of intrusion is large, the contact pressure of the developing blade against the developing sleeve increases. As a result, toner deterioration occurs, the toner cannot fly on the photosensitive drum, and the toner collected by the developing device is used again to perform re-development. As a result, image quality deteriorates.
Also, if the contact pressure is large, the toner is fused to the developing sleeve, causing image defects (white stripes), and the amount of triboelectric charge is reduced in the portion where the fusion has occurred, so that the triboelectric charge is maintained. The non-magnetic one-component toner, which is supposed to run out, cannot be retained, and the toner drops in the developing device.

Conversely, when the amount of intrusion decreases, the toner intrusion portion formed by the developing sleeve and the leading edge of the developing blade decreases, so that the amount of toner supplied to the photosensitive drum decreases. As a result, a phenomenon that the density of the image is low occurs.

In the cleaning process, if the intrusion amount is large, the contact pressure becomes excessive, the fluctuation of the rotation occurs due to the increase of the drum rotation torque, and the toner vibrates due to the drum vibration. Drop it. Conversely, if the amount of penetration is small, the contact pressure becomes small, and toner slips through, thereby deteriorating the image quality.

Therefore, a main object of the present invention is to fix a plate-shaped member to a container as a main body even if each of the plate-shaped member and other constituent members has manufacturing variations. An object of the present invention is to provide a plate member position adjusting / fixing device capable of positioning and fixing a plate member at a predetermined target position of a virtual cylindrical member with high accuracy without causing bending of a hollow container due to pressing by means.

Another object of the present invention is to provide a container in which the plate member can be positioned with high accuracy in the container as the main body even if each of the plate member and the other constituent members has manufacturing variations. It is to provide.

[0028]

The above object is achieved by the plate member position adjusting and fixing device according to the present invention. In summary, the present invention provides a positioning means for positioning a main body to which a plate-shaped member is fixed, a detection means for detecting a position of the plate-shaped member with respect to the main body, and a target position for a virtual cylindrical member from the detected position. Calculating means for calculating the amount of positional deviation up to, driving means for adjusting the drive of the plate-like member based on the calculated amount, and fixing the plate-like member to the main body after drive adjustment of the plate-like member And a fixing means for adjusting the position of the plate-shaped member, comprising: a support portion provided on the main body on the same straight line as the moving direction of the fixing means; and fixing the plate-shaped member to the main body. In order to prevent the deformation of the plate-shaped member, there is provided a plate member position adjusting / fixing device characterized by having backup means which comes into contact with the support portion from the opposite side of the fixing means.

According to another aspect of the present invention, positioning means for positioning a main body to which a cylindrical member and a plate-shaped member are fixed, detection means for detecting the position of the plate-shaped member with respect to the main body, and this detection position From, calculating means for calculating the amount of displacement of the cylindrical member to a virtual target position, driving means for driving and adjusting the plate-like member based on the calculated amount, and after driving adjustment of the plate-like member, A fixing means for fixing the plate-shaped member to the main body, wherein the main body is provided with a support portion on the same straight line as the moving direction of the fixing means, In order to prevent deformation of the main body when the main body is fixed to the main body, there is provided a plate-shaped member position adjusting / fixing device characterized by having backup means abutting on the support portion from the side opposite to the fixing means. It is.

In the above invention, the main body preferably has a hollow container shape. It is preferable that the backup means has a wedge mechanism and abuts on the support via the wedge mechanism. It is preferable that the backup unit abuts on the support in a step before fixing the plate-shaped member to the main body. It is preferable that the backup unit has a contact detection unit at a contact portion with the support unit.

The main body is preferably a developing container of an image forming apparatus. According to another aspect, the main body is preferably a cleaning container of an image forming apparatus.

Preferably, the cylindrical member is a developing sleeve of an image forming apparatus. According to another aspect, it is preferable that the cylindrical member is a photosensitive drum of an image forming apparatus. The plate member is preferably a developing blade of an image forming apparatus. According to another aspect, the plate member is preferably a cleaning blade of an image processing apparatus.

According to another aspect of the present invention, in a container to which a plate-like member is fixed, when the plate-like member is fixed to the container by fixing means, the fixing member moves on the same straight line as the moving direction of the fixing means. In addition, there is provided a container having a support portion on the opposite side of the fixing means.

When the plate-shaped member is fixed to the container by the fixing means, it is preferable that a backup means comes into contact with the supporting part from the side opposite to the fixing means in order to prevent deformation of the container. It is preferable that the support part faces a hollow part of the container. According to another aspect,
It is preferable that the support portion is provided at a portion facing a space different from the hollow portion of the container. According to still another aspect, it is preferable that the support portion is provided on a side wall portion of the container.

Preferably, the container is a developing container, and the plate member is a developing blade. Preferably, the container is a cleaning container, and the plate member is a cleaning blade.

[0036]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a plate-like member position adjusting and fixing device according to the present invention will be described in more detail with reference to the drawings.

An embodiment of the present invention will be described below.

FIGS. 1 to 3 show a plate-like member position adjusting and fixing device (hereinafter referred to as a "blade adjusting device").

The plate member is, for example, a developing blade fixed to a developing container of a developing device in the image forming apparatus shown in FIG. 13, or a cleaning blade fixed to a cleaning container of a cleaning device. .

The blade adjusting device 100 is provided with two container gripping member driving cylinders 4a and 4b which are opposed to each other on a rectangular base 40 as a blade positioning mechanism. Container gripping members 3a, 3b for positioning the container body 1 at the gripping position are fixed to one end, and the container gripping members 3a, 3b are fixed on the base 40 as the drive cylinders 4a, 4b move forward and backward. The container body 1 can be moved in the horizontal direction along the guides 5a and 5b, and the container body 1 is gripped or released.

A blade positioning pin 11 as positioning means is provided on the base 40 in a direction orthogonal to a line connecting the two container gripping member driving cylinders 4a and 4b.
a, 11b two blade driving means 12 for reciprocating movement
a and 12b are arranged at predetermined intervals. The blade positioning pins 11a, 11b are provided with guide members 14a,
Driven along 14b. The blade driving means 1
Numerals 2a and 12b use NC linear motors.

Further, on the base 40, butting pin drive cylinders 16a and 16b for driving the butting pins 15a and 15b are arranged so as to face the blade driving means 12a and 12b.
The blade 2 is sandwiched between the blade positioning pins 11a and 11b and the blade positioning pins 11a and 11b.

The sandwiching position of the blade 2 is determined by the centers of the butting pins 15a and 15b, the center of the thickness of the blade 1, the positioning pins 11a and 11b, the centers of the butting pin drive cylinders 16a and 16b, and the positioning pins. 11
a and 11b are respectively located on straight lines,
Further, the blade 2 is configured to be positioned in parallel with the adjustment direction of the blade 2.

Further, on the base 40, driver driving cylinders 21a, 21b for driving the screw fastening drivers 20a, 20b as fixing means located above the screw holes of the container body 1 in the vertical direction are arranged. I have.

3, CCD cameras 6a1, 6a2, 6b1, and 6b2, which are four detecting means for detecting the leading edge of the blade 2, are provided. The CCD cameras 6a1 and 6b1 are perpendicular to the upper surface of the blade 2 and,
a2 and 6b2 detect the leading edge of the blade 2 from a direction at 45 ° to the upper surface of the blade 2.

CCD cameras 6a1, 6a2, 6b1, 6
The position of b2 is located 100 mm from the center of the blade 2 by center distribution. That is, the CCD camera 6a
1 and 6b1 and the CCD cameras 6a2 and 6b2 are arranged at a distance of 200 mm, respectively. This position is on the LBP or the image area of the copying machine on the product.

For illumination of the blade 2, a halogen lamp 8 and a plurality of illumination members 7 for illuminating the upper surface of the blade from the halogen lamp 8 via an optical fiber are provided.

Next, a backup mechanism (backup means) for the container body will be described with reference to FIG.

The backup mechanisms 10a, 10b
4, when the blade 2 is fastened to the container body 1 with the screw 9 after the positioning of the container body 1 is completed, the blade 2 is prevented from bending and the screw is securely fixed. It is.

The container body 1 has a hollow structure, and supports 23a and 23b are formed below screw holes 30a and 30b formed in the upper plate 1a. More specifically, the support portions 23a and 23b are screwed with the screwdriver 20.
a, 20b are arranged on the same straight line as the forward and backward directions.

The backup mechanisms 10a and 10b are NC
Wedge drive members 26a, 26b by linear motor 28
The wedge drive member 26
The wedge driven members 27a and 27b driven by the wedge driven members 27a and 27b are vertically moved along the guides 25a and 25b, and the backup members 24a and 24b integrated with the wedge driven members 27a and 27b are vertically moved. When the backup members 24a and 24b move up and down, the
Abutment and separation are possible on the bottom surfaces of a and 23b.

After the positioning of the container body 1 is completed by the positioning mechanism of the container body 1, the NC linear motor 28a
By driving the wedge driving members 26a, 26b horizontally by 28b, the wedge driven members 27a, 27b are moved upward along the guides 25a, 25b, the backup members 24a, 24b are moved upward, and the backup member 24a is moved. , 24b are brought into contact with the bottom surfaces of the support portions 23a, 23b to perform backup when screws are fixed.

A force sensor 29 as contact detection means for contact detection is provided on the backup members 24a and 24b at positions where the backup members 24a and 24b contact the support portions 23a and 23b.

As shown in FIG. 4, the container body 1 of the present embodiment has a structure in which the abutment portions 23a and 23b are provided inside the container body 1, but as shown in FIG. Support portions 23a and 23b are provided so as to form a space 32 different from the toner storage portion 30 which is a hollow portion for storing
The closed space 32 may have a structure in which backup can be performed. As shown in FIG. 6, the blade 2 is set long to simplify the structure of the container body 1, and the space of the toner storage unit 30 is reduced. It is also possible to adopt a configuration in which the supporting portions 23a and 23b are provided outside the container body 1, that is, on the outer wall portion, and backup is performed outside the container body.

Next, the control system of the blade adjusting device 100 will be described with reference to the block diagram of FIG.

This control system is connected to a central processing unit (CPU) 50, which is an arithmetic means, by a bus.
A non-volatile memory (ROM) 52 containing a series of control algorithm programs and a man-machine interface program, a power-supply-backed memory (RAM) 54 capable of storing teaching data, and an NC motor 12 for driving positioning pins. A counter 56 that is connected to the encoder 60 and counts to detect the current position of the NC motor 12, is connected to the NC motor 12 via a torque amplifier 64, and outputs a current instruction to the torque amplifier 64 under the control of the CPU 50. / A converter 6
2. The information of the solenoid valve 70, sensor 72, etc.
I / O interface 6 for importing to PU50
6. RS232C interface 84 for exchanging signals with other devices such as image processing device 86;
The CPU 5 is connected to the force sensor 29 via the amplifier 88.
Under the control of 0, the detection value of the force sensor 29 is
D / A converter 89 for outputting to the external teaching device 76,
Teaching device 78, input keyboard 80, CPU 5
, And a communication interface 74 connecting to the communication interface 74.

ROM 52, RAM 54, counter 56,
Converters 62, 89, interfaces 66, 84,
74 is connected to the CPU 50 by a bus 82.

Next, the operation of the blade adjusting apparatus 100 according to the present embodiment with the above configuration will be described with reference to the flowchart of FIG.

First, when the operation starts (S1), the container main body 1 is put into the installation position of the container main body 1 shown in FIGS. 1 to 3 by a transport means (not shown) (S2). At this time, the loaded container body 1 is loaded in a pre-process in a state where the blade 2 is temporarily screwed to the container body 1 in advance. After the loading, it is confirmed that the conveying means has retreated from the interference area, and then the container gripping member driving cylinder 4
a, 4b drives the container body 1 to the container gripping member 3
a and 3b are gripped and positioned (S3).

When the container gripping is completed, the NC linear motors 28a and 28b of the backup drive are driven by the wedge member 26.
a, 26b to drive the backup members 24a, 24b.
To rise. During the ascent, the force sensors 29a, 29b of the backup members 24a, 24b are attached to the contact portions 23a, 23b.
Is detected by a voltage change, and the driving of the NC linear motors 28a and 28b is stopped (S4). After the backup is completed, the driver driving cylinders 21a and 21b and the screw tightening drivers 20a and 20b are operated to
The blade 2 temporarily tightened is screwed to the container body 1,
This is fixed (S5).

The four CCD cameras 6a shown in FIGS.
1, 6a2, 6b1, and 6b2, the image of the blade edge tip is detected, and the RS232C interface 84 is detected.
From the edge of the blade edge to the image processor 86
(S12). CCD cameras 6a1, 6a2 (CH1) for blade 2; 6b1, 6b2 (CH
2), and the positional configuration of the NC positioning pins 11a and 11b and the butting pins 16a and 16b is as shown in FIG.

A blade formed on a phosphor bronze plate placed on a blade sheet metal has a blade center distribution of 10%.
A CCD camera is set at a position of 0 mm, and a position where the sheet metal can be sandwiched between the positioning pin and the abutting pin from the CCD camera toward both ends of the blade sheet metal. According to FIG. The blade sheet metal adjustment position (CH1, CH2).

The CCD cameras 6a1, 6a2, 6b1, 6
The image data of the blade edge tip in the image processing device 86 captured by b2 is binarized, and
D Based on the data obtained from the tip of the blade edge in the image sensor (3 × 3 mm square), calculate the amount of intrusion into the virtual developing sleeve, and calculate the difference from the preset reference amount of intrusion. Ask. At this time, it is determined whether or not the reference intrusion amount is within the allowable deviation amount (S13).

If the deviation is equal to or less than the allowable deviation, the container backup is released (S14) and the grip is released by the intrusion amount OK processing (S15), and the container 1 in the apparatus is transported from the blade adjusting apparatus 100 by a transport means (not shown). It is discharged (S16).

In step S13, if the calculated intrusion amount is outside the allowable range of the reference intrusion amount, the screwing driver 20a20b descends by the intrusion amount NG process, and the blade 2 fixed to the container body 1 The screw 50 is once loosened, and the blade 2 is released from the container body 1 (S6). Then, the positioning pins 11a and 11b are moved and positioned by the amount of movement obtained in the two directions of blade movement from the difference in the amount of intrusion by the above-described arithmetic processing (S7).

For example, as shown in FIG.
If the container body 1 is manufactured according to the reference dimensions, the blade can be adjusted to the position of the reference point A with respect to the virtual sleeve. However, since blades and containers are usually made with errors,
The blade position is higher or lower than the target position.

When the blade position is raised due to variations in the dimensions of the respective components, the blade is moved in the + X direction in FIG. Can be. When the blade position is lowered, the value of the penetration amount can be adjusted to δ by moving the blade in the −X direction in FIG. 10 and adjusting the blade edge to point C.

After the positioning pins 11a and 11b have been moved, in order to adjust the blades to the above-mentioned positions at both ends of CH1 and CH2 shown in FIG.
The abutment pins 15a and 15b are driven from the direction in which the blade sheet metal is sandwiched with respect to the blades a and 11b, thereby sandwiching and restraining the blade 2 (S8). Thereafter, the blade 2 is tightened to the container body 1 again with the blade 2 restrained by the screw tightening drivers 20a and 20b (S9).

After the screw tightening is completed, the screw tightening driver 20
a and 20b are retracted, and at the same time, the positioning pins are released (S1
0), butting pin release (S11) is performed. After this series of adjustments, blade edge detection is performed (S1).
2). Subsequent intrusion amount calculation processing is repeated as described above.

Next, a method of calculating the blade edge and correcting the position of the tip of the blade edge will be described in detail with reference to FIG.

The vertical cameras 6a1 and 6b1 for detecting the blade edge position in the vertical direction set the image reference at the position of the X coordinate x1 at the reference point A in the figure, and set the XY in the figure.
The setting is such that the blade edge position is detected from the + Y direction of the coordinate system.

The oblique 45 ° cameras 6a2 and 6b2 for detecting the blade edge position from the oblique 45 ° direction set the image reference at the position of the X ′ coordinate x1 ′ at the reference point A in FIG. The setting is such that the blade edge position is detected from the X'Y 'direction.

The coordinates of the reference point A in the XY coordinate system are (x1, y1), and the coordinates in the X'Y 'coordinate system are (x, y1).
1 ', y1')

[0074]

(Equation 1) Therefore, x1 ′ = x1cosθ−y1sinθ y1 ′ = x1sinθ + y1cosθ From this and θ = 45 °, y1 = x1−x1′√ (2)

Thus, the coordinates of the tip of the blade edge in the XY coordinate system are (x1, y1) = (x1, x1−x1′√ (2)).

The outer diameter of the sleeve of this embodiment is set to 20 mm.
Then, the equation of the virtual sleeve circle in the XY coordinate system is X ² + Y ² = 10 ² .

If the target penetration amount is δ = 1 mm, the formula of the blade edge trajectory circle is X ² + (Y−1) ² = 10 ² . That is, the purpose of the adjustment algorithm of the present embodiment is to make the edge of the blade 2 coincide with the blade edge locus circle.

Here, the calculation of the adjustment amount by the adjustment algorithm of the present embodiment will be described below.

The XY coordinates of the reference point A are (4.359,-
8) and the amount of deviation from the reference point A is (ΔX, ΔY), the blade edge coordinates in the XY coordinate system are:
(4.359-ΔX, -8-ΔY). From the above equation, (X, Y) = (4.359−ΔX, −8−ΔY) = (4.359−ΔX, −8− (ΔX−ΔX′√ (2))) (However, ΔX ′ is the deviation amount from the reference point in the X′Y ′ coordinate system.) At this time, the penetration amount δ ′ before adjustment is δ ′ = Y + √ (10 ² −X ² ). The adjusted X coordinate for setting δ ′ = δ (the target value of the amount of intrusion) is X2 = √ (10 ² − (Y−1) ² ). X2-X.

First, at the camera position of ch1, FIG.
The point E coordinate of 1. is 4.666 (the deviation amount ΔX from the reference point = −−
0.307), and when the X ′ coordinate is 8.992 (the amount of deviation Δ ′ from the reference point = −0.253), Y in the XY coordinate system
The coordinates are as follows: Y = −8− (ΔX−ΔX′√ (2)) = − 8 − (− 0.307 + 0.253√ (2)) = − 8.05 From the reference point A, the blade edge point Is lower by 50 μm (at the time of the −Y direction side). The penetration amount δ ′ at this time is as follows: δ ′ = Y + √ (10 ² −X ² ) = − 8.05 + √ (10 ² −4.666 ² ) = 0.795 mm Tolerance of penetration amount in this embodiment Is ± 5 μm, the target value is 1 ± 0.005 mm. Therefore, the readjustment is performed at the time of δ ′.

At this time, the adjustment position X2 is obtained from the above-mentioned equation as follows: X2 = √ (10 ² − (− 8− (ΔX−ΔX′√ (2)) − 1) ² ) = √ (10 ² − (− ² ) 8-(− 0.357 + 0.253√ (2)) − 1) ² ) = √ (10 ² − (− 8.05-1) ² ) = 4.254 From this, the movement amount X3 from the current position is X3 = X2-X = 4.254.466 = -0.41
2 mm.

After the movement, the point E becomes the point C (4.254,-
8.05), and the penetration amount δ at that time is as follows: δ = Y + √ (10 ² −X ² ) = − 8.05 + √ (10 ² −4.254 ² ) = 1 mm Using the detected blade edge data, it is possible to accurately calculate the value of the target penetration amount.

Next, at the camera position of ch2, the X coordinate of the point F in FIG. 11 is 4.666 (the deviation amount Δ from the reference point).
X = −0.307) and the X ′ coordinate is 8.602 (the deviation amount ΔX ′ = 0.137 from the reference point), the Y coordinate in the XY coordinate system is Y = −8− (ΔX− ΔX′√ (2)) = − 8 − (− 0.307−0.137√ (2) = − 7.5, and from the reference point A, the blade edge point is 50 μm
It can be seen that it is high (at the + Y direction side). The penetration amount δ ′ at this time is as follows: δ ′ = Y + √ (10 ² −X ² ) = − 7.5 + √ (10 ² −4.666 ² ) = 1.345 mm Is ± 5 μm, the target value is 1 ± 0.005 mm. Therefore, the readjustment is performed at the time of δ ′.

The adjustment position X2 at this time can be obtained from the above-mentioned equation as follows: X2 = √ (10 ² − (− 8− (ΔX−ΔX′√ (2)) − 1) ² ) = √ (10 ² − (− 8 (−0.307−0.137√ (2)) − 1) ² ) = √ (10 ² − (− 7.5−1) ² ) = 5.268 From this, the movement amount X3 from the current position is obtained. X3 = X2-X = 5.268-4.666 = 0.602
mm.

After the movement, the point F becomes the point D (5.268,-
7.5), and the penetration amount δ at that time is as follows: δ = Y + √ (10 ² −X ² ) = − 7.5 + √ (10 ² −5.268 ² ) = 1 mm Using the detected blade edge data, it is possible to accurately calculate the value of the target penetration amount.

In the above process, at the camera positions ch1 and ch2 shown in FIG. 9, the blade adjustment amount (ch1: X
31 = −0.412 mm, ch2: X32 = 0.602
(mm) will be described.

In FIG. 12, the diagonal solid line is the blade edge detection position, and the angle is adjusted and the parallel is adjusted.
Move the blade edge to the target adjustment position. The directions (+,-) shown in the drawings correspond to the directions in FIGS. 9 and 11.

The cameras of ch1 and ch2 are installed at a span of 200 mm. From the cameras of ch1 and ch2,
At the position separated from both ends of the 50 mm blade,
There is a positioning pin for driving the blade sheet metal. As shown in the figure, the respective blade adjustment amounts of the ch1 and ch2 cameras are set to X31 = −0.412 m as described above.
m, X32 = 0.602 mm, ch1, ch2
Since the adjustment amounts X31 ′ and X32 ′ of the positioning pin can be expressed by X31 ′ = (5 × X31−X32) / 4 X32 ′ = (5 × X32−X31) / 4, X31 ′ = (5 × (−0) .412)-0.602) / 4
= −0.666 mm X32 ′ = (5 × 0.602 − (− 0.412)) / 4
= 0.856 mm.

Thus, the movement amount of the positioning pins of Ch1 and Ch2 is X31 ′ = − 0.666 mm, X3
After moving the positioning pin (S5 in the flowchart shown in FIG. 8), the intrusion amount becomes 1 mm at the positions of the cameras ch1 and ch2 by executing steps S6 and subsequent steps in the flowchart shown in FIG. Then, the container is released from the holding by the intrusion amount OK signal and discharged out of the apparatus.

As described above, according to the present embodiment, even if each of the plate-shaped member and the constituent members has manufacturing variations, when the plate-shaped member is fixed to the container, it is pressed by the fixing means. In addition, the bending of the hollow container does not occur, and the plate member can be positioned at a predetermined target position of the virtual cylindrical member with high accuracy.

Further, according to the present blade adjusting method, the following operational effects can be obtained on the product.

Developing process: (1) By making the penetration amount constant, the toner thin layer coat on the surface of the developing sleeve can be made uniform, and the density and the like can be prevented.
Good images can be obtained. (2) Since the amount of penetration is constant, an appropriate and uniform contact pressure can be obtained, so that the deterioration of the toner can be prevented, and the fusion of the toner to the developing sleeve can be prevented. It is possible to prevent dripping and white streaks and to impart a uniform charge amount to the toner, so that a good image can be obtained.

Cleaning process: With appropriate contact pressure, drum vibration due to fluctuations in drum rotation can be suppressed and toner slip-through can be prevented.

[0094]

As is apparent from the above description, according to the plate member position adjusting and fixing device of the present invention, the support portion is provided on the main body, which is a container, on the same straight line as the moving direction of the fixing means. When fixing the plate-shaped member to the main body, in order to prevent deformation of the main body, each of the plate-shaped member and the other constituent members has a backup unit that comes into contact with the support unit from the opposite side of the fixing unit. Even if there is a manufacturing variation, when the plate-like member is fixed to the container as the main body, the plate-like member is fixed to the virtual cylindrical member without bending the hollow container by the pressing by the fixing means. Positioning and fixing to the target position can be performed with high accuracy.

Further, according to the container of the present invention, in the container to which the plate-like member is fixed, when the plate-like member is fixed to the container by the fixing means, the fixing member moves on the same straight line as the moving direction of the fixing means. And by having the supporting portion on the opposite side of the fixing means, even if each of the plate-shaped member and the other constituent members has a manufacturing variation, the plate-shaped member can be accurately placed on the container as the main body. Can be positioned.

[Brief description of the drawings]

FIG. 1 is a front view showing a blade adjusting device for performing a blade adjusting method of the present invention.

FIG. 2 is a plan view of the blade adjusting device of FIG. 1;

FIG. 3 is a side view of the blade adjusting device of FIG. 1;

FIG. 4 is a sectional view of a main part showing a backup mechanism of a container body in the blade adjusting device of FIG. 1;

FIG. 5 is a sectional view of a main part showing another embodiment of the backup mechanism.

FIG. 6 is a sectional view of a main part showing still another embodiment of the backup mechanism.

FIG. 7 is a block diagram illustrating a control system of the blade adjustment device of FIG. 1;

FIG. 8 is a flowchart showing an operation of the blade adjusting device of FIG. 1;

FIG. 9 is a configuration diagram showing a CCD camera and NC adjustment positions.

FIG. 10 is an explanatory diagram of blade adjustment.

FIG. 11 is a diagram for explaining a blade edge calculation and blade edge tip position correction method.

FIG. 12 is an explanatory diagram showing a specific example of a blade edge tip position correction method.

FIG. 13 is a configuration diagram illustrating an example of a conventional image forming apparatus.

14 is a configuration diagram illustrating a developing device of the image forming apparatus of FIG. 13;

FIG. 15 is an enlarged view showing a developing sleeve and an elasticity regulating blade.

FIG. 16 is a side view showing the image carrier and the cleaning device.

FIG. 17 is an enlarged view showing an image carrier and a cleaning member.

FIG. 18 is a diagram for explaining a tip difference (bow amount) generated during blade molding.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Container main body 2 Blade (plate-shaped member) 6a1, 6a2, 6b1, 6b2 CCD camera (detection means) 10a, 10b Backup mechanism (backup means) 11a, 11b Blade positioning pin (positioning means) 12a, 12b Blade driving means (drive) Means) 20a, 20b Screw tightening driver (fixing means) 23a, 23b Supporting parts 26a, 26b Wedge drive member (wedge mechanism) 27a, 27b Wedge driven member (wedge mechanism) 50 CPU (calculation means)

 ──────────────────────────────────────────────────続 き Continuing on the front page F term (reference) 2F065 AA12 AA20 BB01 CC00 FF01 FF04 FF15 FF63 FF67 GG02 JJ03 JJ05 JJ07 JJ08 JJ09 JJ26 LL02 QQ25 QQ31 QQ51 TT02 2H034 BF06 2H077 AD06 AD62 DB01 DA06 DA01 DA01 HA03 HA05 HA13 HA17 HC02

Claims (19)

[Claims] 1. A positioning means for positioning a main body to which a plate member is fixed, a detection means for detecting a position of the plate member with respect to the main body, and a position from the detection position to a target position with respect to a virtual cylindrical member. Calculating means for calculating the amount of displacement; driving means for driving and adjusting the plate-shaped member based on the calculated amount; and fixing means for fixing the plate-shaped member to the main body after drive adjustment of the plate-shaped member. Wherein the main body is provided with a support portion on the same straight line as the moving direction of the fixing means, and when the plate-like member is fixed to the main body, deformation of the main body is reduced. A plate-like member position adjusting / fixing device comprising a backup means for abutting on the support portion from the opposite side of the fixing means to prevent the occurrence of the problem. 2. A positioning means for positioning a main body to which a cylindrical member and a plate member are fixed, a detecting means for detecting a position of the plate member with respect to the main body, and a virtual target of the cylindrical member based on the detected position. Calculating means for calculating an amount of displacement to a position; driving means for driving and adjusting the plate-shaped member based on the calculated amount; and fixing the plate-shaped member to the main body after drive adjustment of the plate-shaped member. A fixing means for adjusting the position of the plate-shaped member, wherein the main body is provided with a support portion on the same straight line as the moving direction of the fixing means, and when fixing the plate-shaped member to the main body, A plate-shaped member position adjusting and fixing device, comprising backup means for abutting the support portion from the opposite side of the fixing means in order to prevent deformation of the main body. 3. The apparatus according to claim 1, wherein said main body has a hollow container shape. 4. The plate member position adjusting and fixing device according to claim 1, wherein said backup means has a wedge mechanism, and abuts on said support portion via said wedge mechanism. 5. A plate member position adjusting and fixing device according to claim 1, wherein said backup means comes into contact with said support portion in a step before fixing said plate member to said main body. apparatus. 6. The plate member position adjusting and fixing device according to claim 1, wherein said backup means has a contact detecting means at a contact part with said support part. 7. The apparatus according to claim 1, wherein said main body is a developing container of an image forming apparatus. 8. The fixing device according to claim 1, wherein the main body is a cleaning container of an image forming apparatus. 9. The apparatus according to claim 1, wherein said cylindrical member is a developing sleeve of an image forming apparatus. 10. The apparatus according to claim 1, wherein said cylindrical member is a photosensitive drum of an image forming apparatus. 11. The fixing device according to claim 1, wherein the plate member is a developing blade of an image forming apparatus. 12. The plate member position adjusting and fixing device according to claim 1, wherein the plate member is a cleaning blade of an image processing apparatus. 13. A container to which a plate member is fixed,
When fixing the plate-like member to the container by fixing means,
A container having a support portion on the same straight line as the moving direction of the fixing means and on the opposite side of the fixing means. 14. A back-up means is abutted against the support from the opposite side of the fixing means to prevent deformation of the container when the plate-like member is fixed to the container by fixing means. 14. The container according to claim 13, wherein 15. The container according to claim 13, wherein the support faces a hollow portion of the container. 16. The container according to claim 13, wherein the support portion is provided at a portion facing a space different from a hollow portion of the container. 17. The container according to claim 13, wherein said support portion is provided on a side wall portion of said container. 18. The image forming apparatus according to claim 13, wherein said container is a developing container, and said plate member is a developing blade.
The container of any one of claims 17 to 17. 19. The container is a cleaning container,
18. The container according to claim 13, wherein the plate-like member is a cleaning blade.