JPH0651641A - Wet type developing device - Google Patents

Abstract

PURPOSE:To provide a wet type developing device prolonging the life of piping by reducing stress imparted to the piping caused by the rotation of a developing device and further, saving a space by simplifying piping arrangement. CONSTITUTION:A pair of holding members 2603 and 2604 are disposed on both end parts in the longitudinal direction of a developing head 2601 whose surface has the formation of a large number of developing grooves 2602, to rotatably hold the developing head 2601, and tubes 40 and 41 communicated with the developing liquid supplying and discharging ports of the developing grooves 2602 of the developing head 2601, respectively and serving as developing liquid passages are led out via the holding member 2603 of one end part side of the developing head 2601.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wet developing apparatus provided with a developing head for developing a electrostatic latent image formed on a sheet-shaped recording medium such as electrostatic recording paper by applying a developing solution. It is about.

[0002]

2. Description of the Related Art Conventionally, an electrostatic recording sheet is conveyed along a conveying path, an electrostatic latent image is formed on the surface of the conveyed recording sheet, and an electrostatic latent image is formed on the recording sheet. 2. Description of the Related Art There is known a wet developing device that develops by applying a developing solution from a developing head.

In such a wet developing device, the electrostatic latent image on the surface of the recording paper is developed for different colors while reciprocating the recording paper, and a color image is formed by superposing these images. There is something to record.

FIG. 15 shows a schematic construction centering on the developing section of a conventional wet type developing apparatus capable of color electrostatic recording. In the figure, 1 is a recording paper roll, around which a recording paper 2 is wound. The recording paper 2 can be reciprocated in a feed-out direction A in the drawing and a winding direction B in the drawing by a drive roller (not shown).

An electrostatic head 3, a developing device 4, and a squeeze head 5 are arranged along the reciprocating direction of the recording paper 2. Here, the electrostatic head 3 forms an electrostatic latent image on the surface of the recording paper. Developing device 4
Is to apply a developing solution to the electrostatic latent image on the recording paper 2, and is composed of developing heads 4a to 4d here. The squeeze head 5 is for sucking and removing the excess developing solution adhering to the recording paper 2.

A developing solution tank 7 is connected to the developing device 4 via a pump 6, and the developing solution is supplied from the developing solution tank 7 to the developing heads 4a to 4d.
The squeeze head 5 is connected to a liquid waste liquid tank 9 for excess development via a vacuum pump 8 so that the excess developer liquid sucked and removed by the squeeze head 5 is discharged to the liquid waste liquid tank 9. A pressing roller 10 keeps the recording paper 2 and the electrostatic head 2 in contact with each other. FIG. 16 shows a schematic configuration of the developing device 4.

In this case, 401 is a rotating body having a prismatic cross section, and this rotating body 401 is arranged below the above-mentioned conveying path of the recording paper 2 in a direction orthogonal to the conveying direction of the recording paper 2. The rotating body 401 has developing heads 4a to 4d provided on its four outer peripheral surfaces, respectively.
The a to 4d are arranged in a cross shape when viewed from the axial direction.

Further, the rotary body 401 is provided with a rotary shaft 402 projecting at axial center positions of both ends thereof.
Are supported by side plates (not shown) on both sides via bearings 403. Then, the rotating shaft 402 is connected to a driving unit (not shown) so that the developing device 4 is rotated by a predetermined angle. On the other hand, each of the developing heads 4a to 4d is provided with a plurality of developing grooves 404 on its surface, and joints 405 are provided in communication with both ends of these developing grooves 404.

To the joint 405 at one end of the developing heads 4a to 4d, developing solution supply pipes 12a to 12d connected to developing solution tanks 7a to 7d of different colors such as black, cyan, magenta and yellow are connected. Further, the other joint 405 is connected to the suction ports of the liquid feed pumps 6a to 6d via the suction pipes 13a to 13d, and the liquid feed pump 14
The discharge ports a to 14d communicate with the developer tanks 7a to 7d.

According to such a configuration, as shown in FIG. 15, the developing device 4 is rotated in the direction C by the rotary shaft 402, but the developing head of the color to be recorded first, for example, the developing head 4a is the recording paper. Positioned so as to face 2. In this state, the recording paper 2 is conveyed in the A direction, and the electrostatic head 3
Form an electrostatic latent image. Next, the liquid feed pump 6a is driven. Then, the opening of the developing groove 404 of the developing head 4a is closed by the recording paper 2 and the inside of the groove becomes negative pressure, and the developing solution is sucked up from the developing solution tank 7a and the developing groove 40
4 and the electrostatic latent image on the recording paper 2 is developed.
After the development is completed, the squeeze head 5 removes the developer adhering to the recording paper 2 and fixes it.

Next, the rotary shaft 40 for developing the second color.
2, the developing device 4 is further rotated in the direction of the arrow in the figure, and the second color developing head, for example, the developing head 4d is positioned at a position facing the recording paper 2. Immediately before this, the recording paper 2 is rewound in the direction B in the drawing onto the recording paper roll 1 to the initial position, and thereafter, the same operation as described above is performed and the recording of the second color is performed. Thereafter, the same operation is repeated for the remaining colors, so that a color image can be obtained on the recording paper 2.

[0012]

However, in the wet type developing device having such a structure, since the developing device 4 is rotated by the rotary shaft 402, the developing solution supply pipes 12a to 12d led out from the developing device 4 and Suction tubes 13a-1
3d may be wound around the rotating body 401, which increases the load for rotating the developing device 4 and may cause a failure of the drive system. In addition, the developer supply pipe 1
2a to 12d and the suction tubes 13a to 13d are attached to the rotary shaft 42.
If the state of being wrapped around is repeatedly applied, a great stress is applied to these pipe portions, and the life of the pipes is shortened.

Further, as described above, the developing solution supply pipes 12a to 12d and the developing heads 4a to 4d for the developing heads 4a to 4d are provided.
Since the suction pipes 13a to 13d for discharging the developing solution from each of the developing heads are separately drawn from both ends of each of the developing heads 4a to 4d, these pipe parts are laid out in a complicated manner inside the apparatus, A large space is required inside the equipment for piping. Further, since the developing solution adheres to the developing groove 404 of each of the developing heads 4a to 4d when it is used for a long time, it is necessary to clean the developing solution. In order to remove the portions 4a to 4d, the other parts attached to the developing heads 4a to 4d are removed, and further, each developing solution supply pipe 1
2a to 12d and suction tubes 13a to 13d for discharging the developing solution
There is a problem that the workability is very poor because it has to be started after removing.

Further, the developing heads 4a to 4a of the developing device 4 are
4d has a plurality of thin grooves formed as the developing grooves 404. Since such developing grooves 404 are formed along the longitudinal direction of the developing heads 4a to 4d, which are long parts, the grooves are formed. A lot of man-hours are required for processing, and each developing head 4
The cost per one of a to 4d is high. This means that the use of a plurality of developing heads 4a to 4d as described above further increases the cost.

Further, when such a rotary type developing device 4 is adopted, the developing solution is removed from the developing heads 4a to 4d each time the developing operation of each color is completed, but the developing solution is removed. Even if you do, some developer remains inevitable, so if you move the developing head while the developer remains, the residual developer will flow down or drip, stain other developing heads, and cause color mixing, There is also the problem of polluting the surrounding area.

The present invention has been made in view of the above circumstances, and reduces the stress applied to the pipe during rotation of the developing device to extend the life of the pipe, and further simplifies the routing of the pipe and saves it. It is an object of the present invention to provide a wet developing device that enables space saving. It is another object of the present invention to provide a wet type developing device capable of easily attaching and detaching the developing head of the developing device and simplifying the cleaning operation of the developing head. A further object of the present invention is to provide a wet developing device that can simplify the processing including the developing groove of the developing head and can reduce the cost. Still another object of the present invention is to provide a wet developing device capable of reliably removing the residual developing solution and preventing problems such as color mixing and contamination of the periphery.

[0017]

SUMMARY OF THE INVENTION According to the present invention, a plurality of developing heads having a large number of developing grooves formed on the surface thereof are provided at both ends in the longitudinal direction of the plurality of developing heads, and the developing heads are rotatably held. A pair of holding members, and a developer flow path that communicates with the developer supply port and the discharge port of the developing grooves of the plurality of developing heads and is led out through the holding member on one end side of the developing head. Has been done.

Further, according to the present invention, a plurality of developing heads having a large number of developing grooves formed on the surface thereof, and a pair of holding members disposed at both ends of the plurality of developing heads in the longitudinal direction are rotatably held. The plurality of developing heads can be attached to and detached from the holding member.

Further, according to the present invention, a plurality of developing heads having a large number of developing grooves formed on the surface thereof, and a pair of holding members arranged at both ends of the plurality of developing heads in the longitudinal direction so as to rotatably hold these developing heads. , A developing solution absorbing member that easily absorbs the developing solution interposed between adjacent ones of the plurality of developing heads.

Still further, according to the present invention, a plurality of developing heads having a large number of developing grooves formed on the surface thereof, and a pair of holding members arranged at both ends in the longitudinal direction of the plurality of developing heads for rotatably holding the developing heads. A member is provided, and at least the plurality of developing heads and a developing solution flow path communicating with the developing solution supply port and the developing solution discharge port of the developing grooves of these developing heads are integrally formed by molding.

[0021]

As a result, according to the present invention, the developing solution flow passages which are respectively connected to the developing solution supply ports and the developing solution discharge ports of the developing grooves of the plurality of developing heads are provided at both ends in the longitudinal direction of the plurality of developing heads. The developing head is rotated so that the tube forming the developing solution flow path is wound around the other member by collecting and leading the developing head to one side of the pair of holding members rotatably holding the developing head. It is possible to prevent sticking and reduce stress on these tubes.

Further, according to the present invention, since the plurality of developing heads can be attached to and detached from the pair of holding members which are disposed at both ends in the longitudinal direction and are rotatably held, You can easily perform work such as cleaning the head.

Further, according to the present invention, since the developing solution absorbing member which easily absorbs the developing solution is interposed between the adjacent ones of the plurality of developing heads, the developing solution flows down when the developing operation is transferred to the next developing head. It is possible to absorb the developer which may be generated.

Furthermore, according to the present invention, a plurality of developing heads and a developing solution flow path that communicates with the developing solution supply port and the developing solution supply port of the developing grooves of these developing heads are integrally formed by molding. Therefore, it becomes possible to easily perform fine processing including the developing groove of the developing head and the developing solution flow path such as the developing solution supply path and the developing solution discharge path.

[0025]

【Example】

(First Embodiment) FIG. 1 shows a schematic structure of a wet developing apparatus according to the first embodiment. In the figure, reference numeral 21 denotes an electrostatic recording paper roll, which has a recording paper 22 wound around the outer circumference of a paper tube.

A guide roller 23 is provided near the set position of the recording paper 22, and a drive roller 24 is provided downstream of the roller 23. As a result, the end portion of the recording paper 22 is guided to the drive roller 24 via the roller 23. Roller 23 and drive roller 24
A recording device 25 and a developing device 26 are arranged between them, and a winding device 27 and a cutter device 2 are provided on the downstream side of the drive roller 24.
8 are arranged.

An electrostatic recording head 251 is provided in the recording device 25, and an electrostatic latent image is formed on the recording paper 22 moving in contact with the upper surface of the electrostatic recording head 251. Further, the developing device 26 includes four developing heads 26a.
To 26d, and these developing heads 26a to 26
Developers of different colors are supplied to d so as to develop the electrostatic latent image formed on the recording paper 22. When forming the color image while reciprocating the recording paper 22 a plurality of times, the developing heads 26a to 26d rotate by a predetermined angle in synchronization with each reciprocating operation,
A color image is formed.

Reference numeral 29 is a suction roller for sucking and removing the excess developing solution adhering to the recording paper 22 during the development by the developing heads 26a to 26d of the developing device 26.

On the other hand, a pinch roller 30 is pressed against the drive roller 24. The drive roller 24 and the pinch roller 30 sandwich the leading end of the recording paper 22 and the drive roller 24 rotates to rotate the recording paper 22 in a circular shape. It is configured to be conveyed along a guide 31 that is curved in an arc shape.
A paper guide 32 is arranged on the exit side of the drive roller 24 so that the recording paper 22 ejected from the drive roller 24 is guided between the guide rollers 331 and 332.

Then, these guide rollers 331, 33
A paper path switching plate 34 is provided on the outlet side of 2.
The paper path switching plate 34 is rotatably supported by a pin 35 and guides the recording paper 22 conveyed through the guide rollers 331 and 332 toward the winding device 27 or the cutter device 28. It is for deciding whether to guide to.

The winding device 27 includes a winding roller 271, a pinch roller 272, and these rollers 271, 272.
It is composed of a paper guide 273 for guiding the recording paper 22 between them.

Further, the cutter device 28 cuts the recording paper 22 sent from the paper path switching plate 34 via the guide rollers 36 and 37 in a direction orthogonal to the feeding direction and a direction parallel to the feeding direction. I have to. Further, such a cutter device 28 is provided with a paper guide 38 for discharging the cut recording paper 22. Next, FIGS.
Is a developing device 26 used in such a wet developing device.
FIG.

FIG. 2 shows a state in which one developing head is assembled in order to facilitate understanding of the developing device 26.
In this case, the developing head 2601 has a large number of developing grooves 2602 formed along the longitudinal direction of its surface. Then, both ends of the developing head 2601 in the longitudinal direction are rotatably held by holding members 2603 and 2604.

The holding member 2603 is composed of a rectangular parallelepiped block, and an opening for engaging a developing solution discharge port (not shown) of the developing groove 2602 of the developing head 2601 with a packing 2605 on the surface holding the developing head 2601. Part 260
6 is provided. The opening 2606 communicates with the joint 2608 attached to the end surface 2603a of the holding member 2603 through the hole 2607. Fitting 2608
Is connected to a tube 40 on the suction side of a liquid feed pump (not shown).

On the other hand, the holding member 2604 is also made of a rectangular parallelepiped block and engages with the surface holding the developing head 2601 through a packing 2609 with a developing solution supply port (not shown) of the developing groove 2602 of the developing head 2601. Opening 2
610 is provided. This opening 2610 has a hole 2611.
Through a joint 2612 attached to the end surface of the holding member 2604. The tube 41 is connected to the joint 2612. And this tube 4
No. 1 penetrates the holding member 2603 and is connected to a developer tank (not shown).

In FIG. 3, the developing head 2601 described with reference to FIG. 2 is assembled at four positions on the peripheral surfaces of the holding members 2603 and 2604, and four developing heads 2601 are held at 90 ° intervals. Shows. in this case,
The tubes 40 and 41 connected to the developing heads 2601 are all end surfaces 2603a of the holding member 2603.
It is derived from the outside. In addition, each developing head 2601
A developer absorbing member 42 made of a material that easily absorbs the developing solution, for example, a sponge or a moltoplane is interposed between the adjacent ones. In this case, the developing solution absorbing member 42 holds the holding members 2603, 2 through the plate 421.
It is adapted to be attached to 604 by screws 422. 4 and 5 illustrate the developing device 26 in more detail, and the same parts as those in FIG. 2 are designated by the same reference numerals.

In this case, as shown in FIG. 4, each of the developing heads 2601 is held by the holding members 2603 and 2604 at both ends thereof.
Positioning pins 26 projecting from 3 and 2604, respectively
The positions of the holding members 2603 and 2604 on the holding members 2603 and 2604 are determined by 13 and are further fixed by screws 2614, and are removable.

The holding member 2603 has an end surface 2603a.
A bearing 2615 is provided around and is rotatably supported by the fixing member 43 through the bearing 2615.
Further, the holding member 2604 has a gear 261 on the end surface 2604a.
6 is provided, and this gear 2616 is provided with a bearing 2617.
It is rotatably supported by a shaft 45 protruding from the fixing member 44 through. And by this gear 2616,
The driving force is transmitted by a driving unit (not shown), and the developing device 26
The whole is driven to rotate.

On the other hand, in FIG. 5, four developing heads 260 are provided.
No. 1 development groove 2602, the tube 40 connected to the joint 2608 communicating with the developer discharge port side, and the development groove 2602.
4 shows the positional relationship on the end surface 2603a side of the holding member 2603 of the tube 41 which is communicated with the developing solution supply port side and is provided so as to penetrate the holding member 2603. In this case, the tubes 40 and 41 are arranged in pairs so as to correspond to the respective developing heads 2601. Next, FIGS. 6 and 7 explain the flow of the developing solution in the developing device 26, and the same parts as those in FIG. 2 are denoted by the same reference numerals.

In this case, when the recording paper is supplied onto the developing head 2601 and adsorbed onto the developing groove 2602, a flow path is formed between them and the developing solution is supplied from this state. In this case, when the liquid feed pump (not shown) is operated, the developing liquid flows from the developing liquid tank (not shown) to the holding member 2.
It passes through the tube 41 penetrating 603 and enters the joint 2612. Then, it enters the opening 2610 through the L-shaped hole 2611 formed inside the holding member 2603, and is supplied to the developing groove 2602 from the developing solution supply port side of the developing head 2601.

In this state, the developing solution is sent to the developing solution outlet of the developing head 2601 through the flow path formed by the developing groove 2602 and the recording paper. Then, an L-shaped hole 2607 formed inside from the opening 2606 of the holding member 2603.
To the joint 2608 through the tube 40 and the tube 40 to the liquid feed pump (not shown).
6 is circulated inside. At this time, the developing head 26
The electrostatic latent image on the recording paper is developed by the developing solution supplied to 01. Next, the operation of the wet type developing device thus configured will be briefly described.

In this case, in FIG. 1, when the recording paper 22 is fed from the electrostatic recording paper roll 21 to the right in the figure, the electrostatic recording head 251 of the recording device 25 causes the electrostatic latent image of the color image of the first color. Is formed. Then, the latent image is developed by the four developing heads 26a to 26d. If, for example, the developing head 26a has the developing solution of the first color, the developing device 26 is rotated to As described above, the developing head 26a is brought into contact with the recording paper 22.

In this state, the recording paper 22 is placed on the developing head 26.
By adsorbing to a, the developing solution is supplied to the developing device 26 through the flow paths of FIGS. 6 and 7, and the electrostatic latent image is developed by the developing solution applied to the developing head 26a. During this series of operations, the recording paper 22 is wound around the outer circumference of the winding roller 271 by the winding device 27 and sent.

When the image formation of the first color is completed, the recording paper 22 is rewound on the recording paper roll 21. At this time, the leading end of the recording paper 22 is kept wrapped around the outer circumference of the take-up roller 271.

Next, the second color image is formed. Assuming that the developing head 26d has the second color developer, the developing device 26 is rotated to bring the developing head 26d into contact with the recording paper 22. Next, the recording paper 22 is fed to the right again again, and the second color image is formed in the same manner as the above operation.

Such an operation is repeated a plurality of times for each color to obtain a color image. Then, when the image formation of the last color is completed, the recording paper 22 is rewound onto the recording paper roll 21. At this time, the leading end is separated from the outer circumference of the winding roller 271 and is rewound to the developing head side. Then, when the paper path switching plate 34 is switched to the direction in which the recording paper 22 is discharged to the outside of the apparatus, the recording paper 22 is fed again and the cutter 28
Is operated, the recording paper 22 is cut into a desired size and discharged to the outside of the apparatus.

Therefore, in this way, the developing device 26
Then, the tubes 40 and 41 communicating with the developer supply ports and the discharge ports of the developing grooves 2602 of the four developing heads 2601 held by the holding members 2603 and 2604 at 90 ° intervals are all held on one side. The member 2603 is led out to the end face 2603a side, that is, the inflow and outflow portions of the developing solution are collected to the holding member 2603 side, and the holding member 26
The end face 2603a of 03 is rotatably supported by the fixing member 43 via the bearing 2615, and the tubes 40 and 41 may be wound around the rotating body by the rotation of the developing device 26 as in the conventional case. The load for rotating the developing device 26 can be reduced, and the cause of the drive system failure can be eliminated. Also, tube 4
Since the state in which 0 and 41 are wound around the rotating shaft is not repeated, the stress applied to these tubes 40 and 41 can be reduced, and the life of these tubes 40 and 41 can be extended. Further, as described above, the tubes 40 and 41 are all attached to the end surface 260 of the holding member 2603.
Since it can be led out from the 3a side, compared to the conventional one in which the piping for the developing head is drawn separately from both ends of the developing head, the piping portion is not complicatedly routed inside the apparatus, and the inside of the apparatus is prevented. Since a large space for arranging the pipe is not required, the device can be downsized.

Further, both ends of each developing head 2601 are held by holding members 2603 and 2604. In this case, each holding member 260 is held by the positioning pins 2613 projecting from these holding members 2603 and 2604.
3, 2604 position and screw 261
Since it is fixed by 4 and is removable,
Even if it becomes necessary to clean the developing head due to the development liquid sticking to the developing groove of each developing head after long-term use, the developing head can be easily removed. Easy to do.

Further, the developing device 26 is rotated by a predetermined angle for each development of each color. At this time, the developing solution remaining in the developing groove 2602 of the developing head 2601 may flow down. Between the developing heads 2601 is a developer absorbing member 42 made of sponge or maltoprene.
Since the developing solution absorbing member 42 can absorb the developing solution flowing down, it is possible to prevent the other developing heads from being contaminated, resulting in color mixing, or contamination of the surroundings. can do. (Second Embodiment) FIGS. 8 to 12 show a schematic structure of a developing device 51 in the second embodiment. In this case, 5101 and 5102 are holding members in FIG.
The piping member 51 is provided between the holding members 5101 and 5102.
03 is held by fitting.

As shown in FIG. 9, the piping member 5103 has a rectangular cross section, is formed in a hollow portion 5103a on its central axis, and a developing solution supply hole 5103b is formed along the periphery of the hollow portion 5103a. And developer discharge hole 510
Four sets of 3c are formed. In addition, on each surface of this piping member 5103, 4
Each developing head 5104 is attached. Also in this case, as shown in FIG.
Fixed to the piping member 5103 with screws 5104a,
It is removable.

Further, each developing head 5 of the piping member 5103
As shown in FIG. 10, the mounting surface of 104 is communicated with the developing solution discharge port (not shown) of the developing groove 5104a of the developing head 5104 and the opening 5105 and the developing solution discharge hole 5103c which are engaged with each other through the packing. And a hole 5106 communicating with the developing solution supply hole 5103b and an opening 5107 that engages with a developing solution supply port (not shown) of the developing groove 5104a of the developing head 5104 via a packing.
108 is provided.

The holding member 5101 which holds one end of the pipe member 5103 by fitting is, as shown in FIGS. 11 and 12, each developing solution supply hole 5103b of the pipe member 5103,
Holes 5109 and 51 communicating with the developer discharge hole 5103c
10 are formed and these holes 5109 and 511 are formed.
The joint 511 arranged on the end surface of the holding member 5101
1, 5112 are attached. And joint 511
1 includes a tube 51 from a developer tank (not shown).
13 and the joint 5112 is connected to the suction side tube 5114 of a liquid feed pump (not shown). Further, the holding member 5101 has a bearing 511 on the outer periphery thereof.
It is rotatably supported by the fixing member 52 via 5.

On the other hand, the holding member 5102 which holds the other end of the piping member 5103 by fitting is shown in FIGS.
As shown in FIG.
3b and the developer discharge hole 5103c are closed by O-rings 5116 and 5117, respectively. Also,
A gear 5118 is provided on the end surface of the holding member 5102, and the gear 5118 is rotatably supported by the shaft 54 protruding from the fixed member 53 via a bearing 5119.
The gear 5118 transmits a driving force by a driving unit (not shown) to rotationally drive the entire developing device 51.

Then, as shown in FIG. 9, each developing head 5
A developer absorbing member 5120 made of a material that easily absorbs the developing solution, such as sponge or moltoplane, is provided between the 104.

In the developing device 51 thus constructed,
When the liquid feed pump (not shown) is operated, the developer passes from the developer tank (not shown) through the tube 5113 and enters the joint 5111, and the hole 5109 of the holding member 5101 and the developer supply hole of the piping member 5103. Pass 5103b,
Further, it is sent from the hole 5108 through the opening 5107 to the developing groove 5104a from the developing solution supply port of the developing head 5104, and from the developing solution discharge port of the developing groove 5104a through the opening 5105 and the hole 5106 of the piping member 5103. Into the developing solution discharge hole 5103c, pass through the joint 5112 from the hole 5110 of the holding member 5101, and the tube 511.
4 is sent to the liquid feed pump, and the developer circulates. Even with this configuration, the same effects as those of the above-described first embodiment can be expected. (Third Embodiment) FIGS. 13 to 14 show a schematic structure of a developing device 61 in the third embodiment. In this case, in FIG. 13, 6101 and 6102 are holding members, and the developing head member 6103 is held between these holding members 6101 and 6102.

This developing head member 6103 comprises four developing heads 6104 at 90 ° intervals, as shown in FIG.
Further, the developing solution supply path 6105 and the developing solution discharge path 6106 corresponding to these developing heads 6104 are integrally formed. Then, the developing groove 6104a of the developing head 6104
The developing solution supply port 6107 and the developing solution discharge port 6108 of the developing groove 6104a are connected to the developing solution supply path 6105 and the developing solution discharge path 6106, respectively.

In this way, the developing head member 610
An aluminum material is used as 3, and the developing head 6104 and the developing solution supply path 61 are formed by, for example, extrusion molding.
05 and the developing solution discharge path 6106 can be integrally obtained, whereby the developing groove 6 of the developing head 6104 can be obtained.
It is possible to easily perform fine processing including the developing solution supply path 6105 and the developing solution discharge path 6106 including 104a, the workability is improved, and the cost can be significantly reduced.

The present invention is not limited to the above-described embodiments, and can be carried out by appropriately changing it within the scope of not changing the gist thereof. For example, the above-mentioned embodiments are applied to a color electrostatic recording apparatus. Although it is applied, it is needless to say that the present invention is not limited to this and can be applied to a wet developing device using another slit developing head.

[0059]

According to the present invention, the developer flow paths communicating with the developer supply ports and the discharge ports of the developing grooves of the plurality of developing heads are provided at both ends in the longitudinal direction of the plurality of developing heads. Since the developing heads are collected and led out to one side of the pair of holding members that rotatably hold the tubes, the tube forming the developer flow path is wrapped around the other members by the rotation of the developing heads. This can be prevented, the load for rotating the developing device can be reduced, and the cause of the drive system failure can be removed. Further, since the winding of these tubes is not repeated, the stress applied to these tubes and the like can be reduced, and the service life can be extended. Furthermore, since the tube is not complicatedly routed inside the device, a large space for routing the pipe inside the device is not required and the device can be downsized.

Further, according to the present invention, since the plurality of developing heads can be attached to and detached from the pair of holding members which are arranged at both ends in the longitudinal direction and are rotatably held, the cleaning work of the developing heads can be performed. You can easily do such things.

Further, according to the present invention, since the developing solution absorbing member which easily absorbs the developing solution is interposed between the adjacent ones of the plurality of developing heads, the developing solution flows down when the developing operation moves to the next developing head. It is possible to absorb the developing solution that may be generated, and to prevent contamination of other developing heads, resulting in color mixing, and contamination of the surroundings.

Furthermore, according to the present invention, a plurality of developing heads and a developing solution flow path communicating with the developing solution supply port and the developing solution discharge port of the developing grooves of these developing heads are integrally formed by molding. From here, you can easily perform fine processing including the developing groove of the developing head and the developing solution flow path such as the developing solution supply path and the developing solution discharge path, which improves the workability and greatly reduces the cost. Can be planned.

[Brief description of drawings]

FIG. 1 is a diagram showing a schematic configuration of a wet developing apparatus according to a first embodiment.

FIG. 2 is a diagram showing a state in which one developing head is assembled as the developing device of the first embodiment.

FIG. 3 is a diagram showing a state in which four developing heads are assembled as the developing device of the first embodiment.

FIG. 4 is a diagram for explaining the developing device of the first embodiment in more detail.

FIG. 5 is a diagram for explaining the developing device of the first embodiment in more detail.

FIG. 6 is a view for explaining the flow of a developing solution in the developing device of the first embodiment.

FIG. 7 is a view for explaining the flow of the developing solution in the developing device of the first embodiment.

FIG. 8 is a diagram showing a schematic configuration of a developing device according to a second embodiment.

FIG. 9 is a view for explaining the piping member of the second embodiment.

FIG. 10 is a view for explaining the piping member of the second embodiment.

FIG. 11 is a view for explaining the flow of the developing solution in the developing device of the second embodiment.

FIG. 12 is a view for explaining the flow of the developing solution in the developing device of the second embodiment.

FIG. 13 is a diagram showing a schematic configuration of a developing device of a third embodiment.

FIG. 14 is a diagram illustrating a developing head member according to a third embodiment.

FIG. 15 is a diagram showing a schematic configuration of a conventional wet developing device.

FIG. 16 is a diagram showing a schematic configuration of a conventional developing device.

[Explanation of symbols]

21 ... Electrostatic recording paper roll, 22 ... Recording paper, 23 ... Roller, 24 ... Driving roller, 25 ... Recording device, 251 ... Electrostatic recording head, 26 ... Developing device, 26a to 26d ... Developing head, 27 ... Winding Device, 28 ... Cutter device, 29 ... Suction roller, 30 ... Pinch roller, 31 ... Guide, 3
2, 33, 36, 37 ... Guide rollers, 34 ... Paper path switching plates 34, 35 ... Pins, 40, 42 ... Tubes, 4
3, 44, 52 ... Fixing member, 45, 54 ... Shaft, 2601
... developing head, 2602 ... developing groove, 2603, 260
4, 5101, 5102, 6101, 6102 ... Holding member, 2605, 2609 ... Packing, 2606, 261
0, 5105, 5107 ... Openings, 2607, 261
1, 5106, 5108, 5109, 5110 ... hole, 2
608, 2612, 5111, 5112 ... Joint, 26
13 ... Positioning pin, 2614 ... Screw, 2615, 2
617, 5115, 5119 ... Bearings, 2616,
5118 ... Gear, 5103 ... Piping member, 5103b ... Developer supply hole, 5103c ... Developer discharge hole, 5104 ... Development head, 5113, 5114 ... Tube, 6103 ...
Developing head member, 6104 ... Developing head, 6105 ... Developing solution supply path, 6106 ... Developing solution discharge path, 6107 ... Developing solution supply port, 6108 ... Developing solution discharge port.

Claims (4)

[Claims] 1. A plurality of developing heads having a large number of developing grooves formed on the surface thereof, and a pair of holding members arranged at both ends of the plurality of developing heads in the longitudinal direction, and rotatably holding these developing heads, A plurality of developing heads, which are respectively connected to the developing solution supply ports and the discharging ports of the developing grooves of the plurality of developing heads, and are led out through a holding member on one end side of the developing heads. Wet developing apparatus having a developing device for 2. A plurality of developing heads having a large number of developing grooves formed on the surface thereof, and a pair of holding members disposed at both ends of the plurality of developing heads in the longitudinal direction so as to rotatably hold these developing heads. A wet developing device having a developing device, wherein the plurality of developing heads can be attached to and detached from the holding member. 3. A plurality of developing heads having a large number of developing grooves formed on the surface thereof, and a pair of holding members disposed at both ends in the longitudinal direction of the plurality of developing heads and rotatably holding these developing heads, A wet developing device having a developing device, comprising: a developing solution absorbing member that easily absorbs a developing solution interposed between adjacent ones of a plurality of developing heads. 4. A plurality of developing heads having a large number of developing grooves formed on the surface thereof, and a pair of holding members arranged at both ends in the longitudinal direction of the plurality of developing heads to rotatably hold these developing heads. A wet developing device having a developing device, characterized in that at least the plurality of developing heads and a developing solution flow path communicating with a developing solution supply port and a developing solution flow path of a developing groove of these developing heads are integrally formed by molding. .