JPH0876600A - Adjusting method for wet image forming device - Google Patents

Abstract

PURPOSE: To obtain an adjusting method for a wet image forming device equipped with a developing device which visualizes an electrostatic latent image with a developer liquid, and to obtain an adjusting method for a wet image forming device in which the developing liquid can be uniformly supplied and a space holding member or the like which would result in troubles in image quality is not required. CONSTITUTION: At first, for example, when the device is installed, an image carrier 1 is provided with a level so that the rotation axis of the image carrier 1 is adjusted as horizontal. After the adjustment is completed, the stretching direction of a developing device 4, namely the longitudinal direction of the developing device 4 is adjusted to be parallel to the rotation axis of the image holding body 1. Then while the image holding body 1 is rotated, the distance between the image carrier 1 and the developing device 4 is measured at plural numbers of points while the image carrier 1 is rotated and the data is stored in a memory 93. Thus, it is ready for the processing, and when an image is to be formed, tracking is done according to the data stored in the memory 93.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wet image provided with a wet developing device which visualizes an electrostatic latent image formed on a drum-shaped image carrier as a single color image or a color image with a developing solution. The present invention relates to a method for adjusting a forming device.

[0002]

2. Description of the Related Art Conventionally, a wet image forming apparatus using the above-described wet developing device has been proposed for the purpose of improving image quality. FIG. 1 is a schematic diagram showing an example of a wet image forming apparatus. The drum-shaped image carrier 1 is rotating in the direction of arrow A, the surface of the image carrier 1 is uniformly charged by the charger 2, and the image carrier carrying the image information is ejected from the exposure device 3. An electrostatic latent image is formed on the surface of the image carrier 1 by the light 3a.

This electrostatic latent image is developed by any of four developing units 4Y, 4M, 4C and 4K which develop with cyan, magenta, yellow and black developing solutions, respectively. However, here, in order to avoid the complexity of illustration,
Only the developing device 4Y is illustrated, and the other developing devices 4M and 4M
For C and 4K, only the recovery roll described later is shown. Each of the developing devices 4Y, 4M, 4C, and 4K has a developing electrode 4 in its housing 41, as shown for the developing device 4Y.
2, a recovery roll 43, and a blade 44 are provided.
Further, a developing solution supply box 45 in which a developing solution is stored is provided corresponding to each of the developing devices 4Y, 4M, 4C and 4K.

Developer housing 41 and developer supply box 45
Is two tubes 48,4 with pumps 46,47
9 and the case 41 and the developer supply box 4
The developing solution circulates between 5 and 5. The developing solution supplied into the housing 41 flows along the developing electrode 42 through the gap between the developing electrode 42 and the image carrier 1 from the upper side to the lower side in the figure, and is formed on the surface of the image carrier 1 in the meantime. Develop the electrostatic latent image. The recovery roll 43 is arranged close to the surface of the image carrier 1 and rotates in the direction of arrow B to store the developer in the housing 41.
Collect to the side. The blade 44 is in contact with the recovery roll 43 and scrapes off the developer adhered to the recovery roll 43.

On the other hand, the transfer roll 10 is rotating in the direction of arrow C, and the transfer drum 10 is supplied with a paper (not shown) supplied along a predetermined paper supply path 11 by a suction corotron 111. Also, it is charged by the suction roll 112 and is attracted to the transfer drum 10. The developed image formed by using any of the four developing devices 4Y, 4M, 4C, and 4K is transferred onto the sheet attracted to the transfer drum 10 by the action of the transfer corotron 114. After the transfer, the surface of the image carrier 1 is cleaned by the cleaning device 5. A sponge roll 52 and a blade 53 are provided inside the housing 51 of the cleaning device 5.

A recovery liquid tank 56 in which the recovery liquid is stored is connected to the cleaning device housing 5 via two tubes 54 and 55, and the recovery liquid stored in the recovery liquid tank 56 is pumped by a pump 57. Is supplied to the cleaning device 5 via the filter 58 for removing the developer, and the recovery liquid inside the cleaning device 5 is collected by the tube 55.
And is recovered in the recovery liquid tank 56 via.

The sponge roll 52 in the housing 51 of the cleaning device 5 rotates in the direction of arrow D while being wet with the recovery liquid to wet the surface of the image carrier 1 with the recovery liquid, and the image carrier 1
The developer adhering to the surface of the is made easy to peel off, and the wet developer is scraped off the surface of the image carrier 1 by the blade 53. The developer scraped off is mixed with the recovery liquid and is recovered in the recovery liquid tank 56.

The image carrier 1 cleaned by the cleaning device 5 is discharged by the discharging lamp 6 and charged by the charger 2 for the next image formation. By repeating the above cycle, the developed images by the developing devices 4Y, 4M, 4C and 4K are superposed on the sheet attracted to the transfer roll 10, and a color developed image is formed on the sheet. After that, the sheet is peeled from the transfer drum 10 by the action of the peeling corotron 115, and is conveyed along the conveyance path 12, and the color development image formed on the sheet by the fixing device 13 is fixed on the sheet and is carried out. To be done. The transfer roll 10 is destaticized by the destaticizing corotron 116, and is prepared for the suction of the next sheet.

In the wet image forming apparatus constructed as described above, when the developing solution is supplied from the developing device 4Y to the electrostatic latent image formed on the surface of the image carrier 1, the developing device 4Y has the same structure. Problems such as non-uniformity at the time of spraying (developing) of the developing solution, inclination of the developing device 4Y itself, and the like cause the flow of the developing solution to shift to one side, resulting in image flow, uneven density, and spilling of the developing solution. This may cause stains in the device or color mixture with other colors. On the other hand, although the structure of the developing device itself is different from that of the above-described developing device, there are some precedents for improving the uneven supply of the developing solution. For example, (a) the gap of the nozzle of the developing device nozzle A method in which a guide plate (liquid plate) is provided in the lower portion to regulate and even out the flow of the liquid (see JP-A-57-118273). (B) A liquid reservoir and a liquid stopper for the developer are provided so that the liquid Method for making flow start uniform (see JP-A-57-87044) (c) Method for changing shape (size) of developer shower tube according to position width direction of discharge port (JP-A-63-63) 781
No. 87) is proposed.

In addition to the above-mentioned prior art, the image carrier 1
The image carrier 1 and the developing units 4Y, 4M, 4C, 4C, 4C, and 4K are uniformly held by a gap holding member such as a tracking roll.
There is also proposed a technique for preventing unevenness in the density of a developed image due to unevenness in the supply of the developing solution, which is caused by a difference in the distance from 4K.

FIG. 2 is a schematic view of a developing device which employs a tracking roll. Here, the developing device 4 shown in FIG.
Description will be made by taking Y as an example, but the other developing device 4 shown in FIG.
The same applies to M, 4C, and 4K. The developing electrode 42 and the collecting roll 43 of the developing device 4Y need to keep constant intervals a and b with the surface of the image carrier 1, and in order to maintain these intervals a and b, the developing electrode 42 and The recovery roll 43 is provided with free-rotating tracking rolls 42a and 43a at both ends in the direction perpendicular to the paper surface of FIG. 2, and these tracking rolls 42a and 43a are provided to the image carrier 1.
It is brought into contact with both ends of the surface of the sheet that do not interfere with image formation. As a result, even if the surface of the image carrier 1 moves toward and away from the developing device 4Y due to the rotation of the image carrier 1 due to the eccentricity of the image carrier 1 or the like, the developing device 4Y is more likely to move. Tracking to it, the predetermined intervals a and b are always maintained.

[0012]

However, in the conventional methods such as the above-mentioned (a) to (c), the image carrier 1 is surely installed horizontally, and the image carrier 1 is further provided with a developing device. It is a means applicable only when 4Y, 4M, 4C and 4K are tracking. In the case of the conventional method, the main purpose is to make the supply (flow) of the developing solution at the spouting port (spouting port) of the developer or immediately after the spouting uniform, and there is no effect in achieving that purpose. It is thought that there is. However, the developing devices 4Y, 4M, 4C, 4
In the case where K itself has an inclination, in the conventional method, even if the flow of the developing solution is evenly maintained up to the supply port, the developing solution after the supply port and after reaching the image carrier 1 can be reliably discharged. It will be biased to one side. This developing device 4Y, 4M,
As one of the means for eliminating the inclinations of 4C and 4K, it is possible to improve the accuracy at the time of manufacturing the device, but this is limited in terms of processing and assembly. It is also possible to adjust the level of the developing device when the service person installs the device, but it is effective in the case of a single color machine equipped with only one developing device, but in the case of a full color machine equipped with multiple developing devices. However, not all developing devices have the same inclination, which is also unreasonable.

Further, the image carrier 1 and the developing devices 4Y, 4M,
A means for uniformly holding the gaps (a, b; see FIG. 2) with 4C, 4K by the gap holding members (tracking rolls 42a, 43a) and preventing uneven supply of the developer onto the electrostatic latent image is provided. However, if the developing device is tilted, uneven contact may occur, and in this case, unevenness in the flow of the developer may occur as well as occurrence of defective uniformity in the gap, and the edge stains by the developer may occur. In particular, a gap holding member (tracking rolls 42a, 4
3a) is contaminated, which leads to further unevenness of the gap, vibration during rotation of the image carrier 1, and the like.
It causes deterioration of image quality.

In view of the above-mentioned circumstances, the present invention provides a method for adjusting a wet image forming apparatus, which enables uniform supply of a developing solution and which does not require a gap holding member or the like which causes image quality trouble. With the goal.

[0015]

A wet image forming apparatus to be adjusted in a method of adjusting a wet image forming apparatus of the present invention which achieves the above object has the following constitution. First, as a basic configuration, in this wet image forming apparatus, (1) an image carrier that rotates around a predetermined rotation axis and on which an electrostatic latent image is formed (2) parallel to the rotation axis Development that forms a developed image on the surface of the image carrier by developing an electrostatic latent image formed on the surface of the image carrier, which is extended and arranged at a predetermined distance from the surface of the image carrier, with a developing solution (3) A transfer device for transferring the developed image formed on the surface of the image carrier onto a predetermined transfer material is provided.

This wet image forming apparatus has the above (1) to (1).
In addition to (3), as a means for adjustment, (4) a level can be attached to at least one position of the image carrier, and (5) the extending direction of the developing device is parallel to the rotation axis. First adjusting means for movably adjusting the developing device so that (6) distance measuring means for measuring the distance between the image carrier surface and the developing device in a non-contact manner (7) measured by the distance measuring means, A memory for storing the distance between the image carrier surface and the developing device at a plurality of positions while the image carrier rotates (8) The distance between the image carrier surface and the developer based on the distance stored in the memory. A second adjusting means is provided for movably adjusting the developing device so as to maintain a predetermined interval.

A wet forming apparatus adjusting method of the present invention is an adjusting method for adjusting a wet image forming apparatus equipped with the above-mentioned elements (1) to (8), wherein (A) first, an image carrier. Attach a level to the to adjust the rotary shaft horizontally, (B)
Then, the first adjusting means is operated to adjust the extending direction of the developing device, and (C) the distance measuring means is operated while rotating the image carrier, and the plurality of positions are rotated while the image carrier is rotated. The distance between the image carrier and the developing device is measured and stored in the memory, and (D) the second adjusting means is operated at the time of image formation to contact the developing device on the surface of the rotating image carrier. It is characterized in that the developing device is made to follow the movement in the separating direction.

[0018]

According to the method for adjusting a wet image forming apparatus of the present invention, first, for example, when the apparatus is installed, a level is attached to the image carrier by, for example, a service person,
The rotation axis of the image carrier is adjusted to be horizontal.
After the adjustment is completed, the first adjusting means (5) is operated to adjust the extending direction of the developing device, that is, the longitudinal direction of the developing device so that the rotation axis of the image carrier is parallel. It

After that, the interval measuring means is operated while rotating the image carrier, and the intervals between the image carrier and the developing device at a plurality of positions during the rotation of the image carrier are measured and stored in the memory. . Prepare up to this point, and at the time of image formation,
Tracking is performed by operating the second adjusting means (8).

By such an adjusting method, the image carrier and the developing device are arranged in a predetermined horizontal state, and the developing device tracks the image carrier without contact. Further, this tracking is performed based on the interval previously stored in the memory, and even if the developer or the like adheres to the surface of the image bearing member where the interval is measured by the interval measuring means during image formation. However, highly accurate tracking is performed without being affected by this.

[0021]

Embodiments of the present invention will be described below.
The overall structure of the wet-type image forming apparatus of the present embodiment is similar to that described with reference to FIG. 1, and therefore, redundant description will be omitted here, and FIG. However, the wet image forming apparatus in the embodiment is not provided with the tracking rolls 42a and 43a shown in FIG. Further, here, it is assumed that the copier is configured by combining the wet image forming apparatus shown in FIG. 1 and an image reading apparatus (not shown) that reads an image recorded on a document and converts the image into an electric signal. So, for example,
Image formation is called copying.

FIG. 3 is a schematic view showing a structure for horizontally adjusting the rotation axis of the image carrier. As shown in FIG. 3C, a motor 72 for rotating the image carrier 1 is fixed to a motor mounting bracket 71 fixed to the housing 70 at one end side of the rotation shaft 11 of the image carrier 1. The shaft of the motor 72 is connected to one end of the rotary shaft 11 via a coupling 73. The other end of the rotary shaft 11 is rotatably supported by a bearing 74. A height-adjustable adjuster 75 is provided at the bottom of the housing 70.

The image carrier 1 is configured to always stop at the rotation initial position when the rotation stops, and the end portion of the rotation shaft 11 of the image carrier 1 at the rotation initial position on the bearing 74 side. The upper surface of the is cut horizontally, and the rotating shaft 11
A level 79 for measuring the horizontal level of is attached detachably. The upper surface, which is brought into contact with the rotary shaft 11 and the level 79, and which is cut horizontally, has the highest precision in terms of processing tolerance, and the error due to the mounting of the level 79 is suppressed as much as possible.

For horizontal adjustment of the rotary shaft 11 of the image carrier 1, after the copying machine is installed at a predetermined installation position,
A level 79 is attached as shown in the figure, and the adjuster 75 adjusts the rotary shaft 11 so that it is horizontal. After the adjustment is completed, the level 79 is removed from the rotary shaft 11. After the horizontal adjustment of the image carrier 1 is performed as described above,
This time, the developing devices 4Y, 4M, 4 for the image carrier 1
The positions of C and 4K (typically referred to as the developing device 4) are adjusted.

FIG. 4 is a schematic view showing the direction of position adjustment of the developing device 4 with respect to the image carrier 1. As shown in FIG. 4, the developing device 4 needs to adjust both the tangential direction (z direction) of the image carrier 1 and the direction (x direction) of approaching and separating the image carrier, and z In both the direction and the x direction, it is necessary to make adjustments at both ends of the developing device 4 in the direction perpendicular to the paper surface of FIG.

FIG. 5 is a schematic view showing an adjusting mechanism (an example of the first adjusting means according to the invention) for adjusting the position of the developing device 4 in the z direction shown in FIG. As shown in FIG. 5 (A), a position detection sensor that detects a mark formed on the rotary shaft 11 of the image carrier at a position horizontal to the upper plane of the developing electrode 42 at both ends of the developing device 4. 80, on the other hand, as shown in FIG. 5B, the rotary shaft 1 of the image carrier.
Marks 81, which are detected by the position detection sensor 80, are engraved on both ends of 1.

The position detecting sensor 80 and the mark 81 are
With the image carrier stopped at the predetermined rotation initial position,
When the position detection sensor 80 detects the mark 81, it is fixed or engraved at a position where the position of the developing device 4 in the z direction (see FIG. 4) is correctly determined. FIG. 5C shows the developing device 4.
5 is a view showing a mechanism for adjusting the position in the z direction shown in FIG.
Is fixed to the shaft of the motor 83, and a ball screw 84 having a thread engraved on the outer periphery is connected to the shaft of the motor 83. The ball screw 84 is screwed with the developing device receiving member 85, and the developing device receiving member 85 Is supported. Although only the adjusting mechanism on one end side of the developing device 4 is shown in FIG. 5C, an adjusting mechanism similar to this is also provided on the other end side of the developing device 4.

When an adjustment start button (not shown) is pressed, the position detection sensor 80 starts detecting the mark 81, and the detection value is input to the comparison means 86. The comparison means 86 determines whether or not the input detection value is a predetermined value, and outputs an operation signal to the controller 87 while the detection value is different. In response to this, the controller 87 continues to output a predetermined pulse to the motor 83, the motor 83 continues to rotate at a constant speed, the ball screw 84 rotates, and the development receiving member 85 moves in the z direction. The developing device 4 moves in the z direction at a constant speed. When the detection value input from the position detection sensor 80 reaches a predetermined value, the comparison means 86
Outputs a stop signal to the controller 87, whereby the controller 87 stops pulse output and the motor 83 stops. This operation is performed at both ends of the developing device 4, and the developing device 4 is fixed at a position parallel to the horizontally fixed image carrier, that is, horizontally.

Although the ball screw 84 is used as the mechanism for moving the developing device 4 here, the mechanism for moving the developing device 4 is not limited to this. Figure 6
FIG. 9 is a schematic diagram showing an adjusting mechanism (an example of a memory and a second adjusting unit according to the present invention) for adjusting the position of the developing device 4 in the x direction shown in FIG. 4. As shown in FIGS. 6A and 6B, distance sensors 90 that measure the distance to the image carrier 1 are provided at both ends of the developing device 4. After the developing device 4 is adjusted in the z direction by the structure shown in FIG.
While rotating the image carrier 1, the distance sensor 90 measures the distance between the surface of the image carrier 1 and each of the plurality of rotational positions. This distance may differ for each rotational position due to eccentricity of the image carrier 1. Distance sensor 90
The distance value measured at is input to the comparison / calculation means 91, and the comparison / calculation means 91 compares the distance value with the reference value to calculate the distance correction amount for each rotational position. This distance correction amount is input to the numerical value conversion means 92, converted into a motor control numerical value for controlling a motor described later, and stored in the memory 93.

FIG. 6C is a view showing a mechanism for adjusting the distance (x direction shown in FIG. 4) between the developing device 4 and the surface of the image carrier 1, and is a casing plate on the side of the apparatus. A motor 95, which is rotatable in forward and backward directions, is fixed to the motor 96, and a ball screw 97 having a screw on its outer periphery is connected to the shaft of the motor 95. The ball screw 97 is screwed with the developing device moving member 82. The developing device moving member 82 supports the developing device 4 as shown in FIG. Although FIG. 6C shows only the adjusting mechanism on one end side of the developing device 4, the same adjusting mechanism is provided on the other end side of the developing device 4.

When a copy start button (not shown) is pressed, the image carrier 1 starts to rotate, and at the same time, a numerical value for motor control corresponding to the rotation position of the image carrier 1 is read out and controlled. The pulse is input to the means 94, and the control means 94 inputs to the motor 95 the number of pulses that matches the input numerical value. Then, the motor 95 rotates at each rotational position of the image carrier 1 so that the distance between the surface of the image carrier 1 and the developing device 4 is always constant, and the ball screw 97 rotates as the motor 95 rotates. Rotates, and the developing device moving member 82 screwed with the ball screw 97 moves in the x direction. As a result, tracking is performed according to the rotation of the image carrier 1. This tracking is not in contact with the image carrier 1 and is performed based on the numerical value stored in the memory 93. Therefore, even if the developer adheres to the surface of the image carrier 1, it is accurate. Tracking is performed.

FIG. 7 is a schematic diagram showing a state in which the adjusting mechanism shown in FIG. 5 and the adjusting mechanism shown in FIG. 6 are combined, and FIG. 8 is a schematic diagram showing the structure of the developing device receiving member. 5 and 6
The two adjusting mechanisms shown in Fig. 7 are combined as shown in Fig. 7,
When the ball screw 84 rotates, the developing device 4 moves in the z direction shown in FIG. 4, and when the ball screw 97 rotates, the space between the developing device 4 and the image carrier 1 (the x direction shown in FIG. 4) is adjusted. .

Here, both of these adjusting mechanisms and the developing device 4 are connected via a developing device receiving member 85. As shown in FIG. 8, a ball bearing 85a is installed in an elliptical shape on the developing device receiving member 85. Therefore, even if the developing device 4 is complicatedly moved and adjusted by both adjusting mechanisms, both of them are installed. No galling occurs between the adjusting mechanism and the developing device 4.

FIG. 9 is a flowchart showing an adjustment sequence at the time of installation of the copying machine having the above-mentioned adjusting mechanism. First, this device is installed in a predetermined installation place (step S1). After that, as shown in FIG. 3, a level 79 is attached to the rotary shaft 11 of the image carrier 1 (step S2), and the adjuster 75 is adjusted to level the image carrier 1 (step S3).

Next, when an adjustment start button (not shown) is pressed (step S4), the position detection sensor 8 shown in FIG.
0 operates (step S5), and the mark 81 is detected by the position detection sensor 80 (step S6).
The motor 83 for adjusting the z direction of the developing device 4 shown in (C) rotates (step S7). When the position detection sensor 80 detects the mark 81, the motor 83 stops (step S8), and this time, the distance sensor 90 for measuring the distance between the surface of the image carrier 1 and the developing device 4 shown in FIG.
Is activated (step S9), the image carrier 1 is rotated, and the eccentricity of the image carrier 1 is measured, that is, the distance between the surface of the image carrier 1 and the developing device 4 at each rotational position of the image carrier 1. Measurement of (gap) is performed (step S10), and FIG.
In the comparison / calculation means 91 shown in FIG. 5, the gap reference value and the eccentricity amount are compared and calculated (step S11), and the numerical value that determines the moving amount of the developing device is calculated (step S1
2). The calculated numerical value is stored in the memory 93 shown in FIGS. 6B and 6C (step 13).

As described above, the adjustment at the time of installing the apparatus is performed. FIG. 10 is a flowchart of tracking at the time of copying. When a copy start button (not shown) is pressed, the numerical value corresponding to the rotational position of the image carrier 1 is read from the memory 93 in accordance with the rotation of the image carrier 1 (step S21), and FIG. The distance (gap) between the surface of the image carrier 1 and the surface of the image carrier 1 as described with reference to FIG.
Gap control is performed so as to always keep constant (step S22), and this is repeated until copying is completed (step S23).

In this way, at the time of copying, the tracking of the image carrier 1 of the developing device 4 is performed.

[0038]

As described above, according to the adjusting method of the present invention, the image carrier is horizontally arranged, the developing device is also horizontally arranged in accordance therewith, and the image carrier is not in contact with the image carrier. In addition, tracking is performed based on the value stored in the memory, which represents the amount of eccentricity of the image bearing member, so that the developer is uniformly supplied and high-quality image formation is performed.

[Brief description of drawings]

FIG. 1 is a schematic view showing an example of a wet image device.

FIG. 2 is a schematic diagram of a developing device that employs a tracking roll.

FIG. 3 is a schematic diagram showing a structure for horizontally adjusting a rotation axis of an image carrier.

FIG. 4 is a schematic diagram showing a direction of position adjustment of the developing device 4 with respect to the image carrier 1.

5 is a schematic diagram showing an adjusting mechanism for adjusting the position of the developing device 4 in the z direction shown in FIG.

6 is a schematic view showing an adjusting mechanism for adjusting the position of the developing machine 4 in the x direction shown in FIG.

7 is a schematic diagram showing a state in which the adjusting mechanism shown in FIG. 5 and the adjusting mechanism shown in FIG. 6 are combined.

FIG. 8 is a schematic view showing a structure of a developing device receiving member.

FIG. 9 is a flowchart showing an adjustment sequence at the time of installation.

FIG. 10 is a flowchart of tracking at the time of copying.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Image carrier 2 Rotating shafts 4, 4Y, 4M, 4C, 4K Developing device 42 Developing electrode 43 Collection roll 79 Leveler 80 Position detection sensor 81 Mark 83 Motor 84 Ball screw 90 Distance sensor 93 Memory 95 Motor 97 Ball screw

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Satoshi Usui 2274 Hongo, Ebina City, Kanagawa Fuji Xerox Co., Ltd.Ebina Works (72) Inventor Yoshinori Machida 2274 Hongo, Ebina City, Kanagawa Fuji Xerox Co., Ltd.Ebina Business (72) Inventor Shinichi Utsumi 2274 Hongo, Ebina City, Kanagawa Fuji Xerox Co., Ltd.Ebina Business Office (72) Inventor, Shin Nikura, 2274 Hongo, Ebina City, Kanagawa Fuji Xerox Co., Ltd.Ebina Business Office

Claims (1)

[Claims] 1. An image carrier that rotates about a predetermined rotation axis and on which an electrostatic latent image is formed, and a state that extends parallel to the rotation axis and is separated from the surface of the image carrier by a predetermined distance. And a developing device for forming a developed image on the surface of the image carrier by developing the electrostatic latent image formed on the surface of the image carrier with a developing solution. A method for adjusting a wet-type image forming apparatus including a transfer device for transferring a developed image onto a predetermined transfer material, wherein the wet-type image forming apparatus is capable of attaching a level to at least one position of the image carrier. A first adjusting means for movably adjusting the developing device so that the extending direction of the developing device is parallel to the rotation axis; and the surface of the image carrier and the developing device. An interval measuring means for measuring an interval in a non-contact manner, and an interval measuring means A memory for storing the intervals at a plurality of positions during rotation of the image carrier, and to maintain the interval between the surface of the image carrier and the developing unit at a predetermined interval based on the intervals stored in the memory. Second adjusting means for movably adjusting the developing device, a level is attached to the image carrier to horizontally adjust the rotating shaft, and the first adjusting means is operated to operate the developing device. Adjusting the extending direction of the container, operating the interval measuring means while rotating the image carrier, measuring the intervals at a plurality of points during the rotation of the image carrier, and storing it in the memory. A wet image forming apparatus characterized in that, at the time of formation, the second adjusting means is operated to cause the developing device to follow the movement of the surface of the rotating image bearing member in the direction toward and away from the developing device. Adjustment method.