JP3186025B2 - Ink jet recording device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink circulating apparatus for an ink jet recording apparatus, and more particularly to an ink jet recording apparatus which simplifies the connection of a circulating pipe for circulating ink and a solvent.

[0002]

2. Description of the Related Art Conventionally, in a circulation device of an ink jet recording apparatus, a flow path for circulating ink or a solvent is generally a flexible thin tube having an inner diameter of, for example, about 1 to 3 mm. According to the above or slightly streamlined ones, holes formed linearly from both sides of the circulation board are connected and formed at arbitrary positions. Therefore, there is a possibility that a long time is required for the piping or a piping error occurs. In the latter case, a long flow path to the connecting portion naturally requires a long hole. Such a material of the circulating board can be made of synthetic resin but cannot be produced by injection molding. Therefore, it has been manufactured by machining with a milling machine or a ball machine.

[0003]

However, these processing operations are inefficient and lack the productivity, so that the finished product is expensive. In addition, the chips generated in the cutting operation are difficult to remove because they adhere to the depth of the deep hole, and often cause clogging of the flow passages and nozzles, resulting in poor circulation and ejection.

[0004] An object of the present invention is to solve the above problems.
An object of the present invention is to provide an ink jet recording apparatus provided with a circulating device that simplifies connection of piping for circulating ink and a solvent.

[0005]

In order to achieve the above object, the present invention provides a printing head for ejecting and printing ink particles, and a method in which ink in an ink holding container is pressurized by a first fluid pressure feeding means. An ink supply unit for supplying the print head with the solvent, a solvent supply unit for supplying a solvent from the solvent holding container to the print head with a second fluid pressure supply unit, and both the ink and the solvent not used for printing from the print head. A collection unit configured to collect the liquid in the ink holding container by a third fluid pumping unit; and a pipe including a component of each of the fluid pumping units and a flow path of the two fluids that connects between the fluid pumping units. In an ink jet recording apparatus provided with a circulating device, the circulating device mounts the components of the plurality of fluid pumping means on at least one surface, and communicates with the fluid pumping means on the other surface. A circulation board having a plurality of inflow ports for inflow and outflow of the two liquids, and a flow path connecting the inflow and outflow ports, wherein the flow path and the inflow and outflow ports are opposed to each other to form the circulation board. With a sealing plate for watertight
The seal plate forms the flow path having a protruding portion.
An elastic member that holds the elastic body and is fixed to the circulation board.
And a back plate defined .

Another feature of the present invention is that a print head for ejecting and printing ink particles and an ink supply for supplying ink to the print head by pressurizing ink in an ink holding container by a first fluid pressure feeding means. Means, a solvent supply means for supplying a solvent from the solvent holding container to the print head by a second fluid pressure supply means, and a third fluid pressure supply means for supplying both the ink and the solvent not used for printing from the print head. An ink jet recording apparatus comprising: a collecting means for collecting the fluid into the ink holding container, and a circulating device having a pipe including the components of the fluid pumping means and the fluid paths for connecting the fluid pumping means to each other. In the circulating device, the part corresponding to the pipe connection part of the components of the plurality of fluid pumping means is integrally formed on at least one surface, and the plurality of fluid pumps are provided. On the other surface, a circulation board having a plurality of inlets and outlets communicating with the fluid pumping means and flowing in and out of the two liquids is formed, and the flow passage connecting the inlets and outlets is formed on the other surface. the circulating ball is opposed to said respective inlet outlet and said flow passage and - possess a sealing plate for watertight secured to de, the seal plate may form the flow path having a projecting portion
An elastic member to be formed, and the circulating board holding the elastic body.
It consists of a fixed back plate .

Another feature of the present invention is that a print head for ejecting ink particles for printing and an ink supply for supplying ink to the print head by pressurizing ink in an ink holding container by a first fluid pressure feeding means. Means, a solvent supply means for supplying a solvent from the solvent holding container to the print head by a second fluid pressure supply means, and a third fluid pressure supply means for supplying both the ink and the solvent not used for printing from the print head. An ink jet recording apparatus comprising: a collecting means for collecting the fluid into the ink holding container, and a circulating device having a pipe including the components of the fluid pumping means and the fluid paths for connecting the fluid pumping means to each other. In the circulating apparatus, the component parts of the plurality of fluid pumping means are mounted on at least one surface, and a plurality of the fluid pumping means communicate with the fluid pumping means on the other surface to inflow and outflow the two liquids. Circulating ball having inflow outlet - possess a wear plate for watertight fixed to de, - and de, the seal plate forming the flow path connecting between the respective inflow outlet, the sealing plate the circulating ball The seal plate has a protrusion.
An elastic member forming a flow path; and
And a back plate fixed to the board .

Another feature of the present invention is that a print head for ejecting and printing ink particles and an ink supply for supplying ink to the print head by pressurizing ink in an ink holding container by first fluid pressure feeding means. Means, a solvent supply means for supplying a solvent from the solvent holding container to the print head by a second fluid pressure supply means, and a third fluid pressure supply means for supplying both the ink and the solvent not used for printing from the print head. An ink jet recording apparatus comprising: a collecting means for collecting the fluid into the ink holding container, and a circulating device having a pipe including the components of the fluid pumping means and the fluid paths for connecting the fluid pumping means to each other. In the circulating device, the part corresponding to the pipe connection part of the components of the plurality of fluid pumping means is integrally formed on at least one surface, and the plurality of fluid pumps are provided. On the other surface, a circulation board having a plurality of inlets and outlets communicating with the fluid pumping means and flowing in and out of the two liquids is formed, and the flow passage connecting the inlets and outlets is formed on the other surface. a seal plate for the circulating ball the seal plate - possess a wear plate for watertight secured to de, the seal
The plate is an elastic member forming the flow path having a protruding portion.
And a back plate holding the elastic body and fixed to the circulation board.
And that it consists of

According to the present invention, the circulation board of the circulation device of the ink jet recording apparatus is formed by using a synthetic resin or the like as a material, and a plurality of components of the fluid pumping means are mounted on at least one surface of the circulation board. . Each component is assembled before it is mounted on the circulation board so as to function completely, and a portion corresponding to a pipe connection portion of each component is integrally formed on at least one surface of the circulation board. In addition, there are two types in which each component is incorporated and functions thereon.

On the other side of the circulating board, there are provided a plurality of inlets and outlets which communicate with the fluid pumping means and in which ink or solvent flows in and out. It is preferable that the surface on which the inflow and outflow ports are arranged is flat. A flow path is formed in the seal plate between the inflow and outflow ports provided on the circulation board, and the flow path and the inflow and outflow ports are opposed to each other and are fixed to the circulation board in a watertight manner.
Alternatively, the sealing plate may be further stacked on the sealing plate, and the sealing plate may be pressed against the circulation board and fixed.

As described above, the sealing plate is fastened to the circulating board with screws or the like, or the sealing plate is fastened with screws or the like with the sealing plate sandwiched between the plate and the circulating board. Is pressed against the circulation board to form a watertight closed channel.

Thus, the flow paths communicating with the respective fluid pressure feeding means and connecting the respective inflow / outflow ports for inflow / outflow of ink or solvent can be integrated into one seal plate. Further, the ink and the solvent flowing into the seal plate and the circulation board flow in the closed flow path and the pipe, so that the leakage of the ink and the solvent can be eliminated.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An ink jet recording apparatus provided with a circulation device according to one embodiment of the present invention will be described below with reference to the drawings. In the drawings, the same parts are denoted by the same reference numerals.

FIG. 1 shows the entire piping of an ink jet recording apparatus provided with a circulation device according to one embodiment of the present invention. 1
Is a main body case of the ink jet recording apparatus. The main body case 1 is composed of an ink container 2, a solvent container 3, a circulation device 4 and a control device 5.

Reference numeral 6 denotes a print head, a nozzle 19 for ejecting ink particles, and an ink recovery port 2 for recovering ink particles.
1.

The circulating device 4 includes a fluid pumping means for a circulating portion, that is, components such as a pump and an electromagnetic valve and a filter-1
And a pump 8, 9, which is driven by a motor 12 and is used for sending and sucking ink and solvent.
10, 11; a main ink container 15 for holding ink and a solvent; a filter 16 for removing foreign matter mixed in the ink and the solvent; It is composed of a valve 17 and the like.

Ink particles 20 emitted from the nozzle 19
Are supplemented to the ink recovery port 21 except for the particles used for recording. The supplemented ink is piped so as to return to the main ink container 15.

When the control device 5 is connected to the power supply and the starting operation is performed, the motor 12 rotates, and the pumps 8, 9, 10, and 11 start the sending or suction operation. The pump 8 sucks ink from the ink container 2 and sends it to the main ink container 15. When there is still enough ink in the main ink container 15, the electromagnetic valve 13 closes to stop the flow. Similarly, the pump 9 removes the solvent in the solvent container 3 from the main ink container 1.
Send to 5. However, unless the ink viscosity in the main ink container 15 becomes higher than a certain reference value, the electromagnetic valve 14
Closes and blocks the flow. The ink viscosity is constantly checked by a viscosity sensor (not shown) provided near the main ink container 15.

The pump 10 sucks ink from the main ink container 15 and sends it to the filter 16 side. The liquid pressure of the ink passing through the filter 16 is reduced to an appropriate pressure by the pressure reducing valve 17 and smoothed, and is sent to the nozzle 19 via the electromagnetic valve 18. The ink is applied to the nozzle 19
The particles are excited into particles by the piezoelectric element incorporated therein, and become the ink particles 20 flying in the air. The ink particles 20 that have not been used for recording are captured by the ink recovery port 21. The captured ink particles 20 are sucked by the pump 11. At this time, since the electromagnetic valve 23 is open,
The ink is collected in the main ink container 15. The electromagnetic valve 22 is opened when the ink in the nozzle 19 is to be collected, and is mainly used for cleaning the nozzle 19.

The details of the circulation device 4 according to one embodiment of the present invention will be described with reference to FIGS. FIG. 2 shows a state in which the components of the fluid pumping means of the circulation section are mounted on the upper surface of the circulation board 7 of FIG. As shown in FIG. 2, the electromagnetic valves 13, 14, 18, 22, and 23 are mounted on one side of the circulation board 7 and are attached with screws 26, respectively.

On the opposite side, as shown in FIG.
The plate 24 and the plate 25 are mounted on the circulation board 7 in a double manner. Further, the main ink container 15 and the filter 16 are placed on the contact plate 25 and attached with screws 26. The screw 27 penetrates through the abutment plate 25, the seal plate 24, and the circulation board 7, and the base members 13D, 14 of the respective components.
D, 18D, 22D, 23D, 12A and the like.

Since the circulation board 7 comes into contact with the ink and the solvent, it must be made of a material which is not affected by these. For example, if the solvent is such as methyl ethyl ketone (MEK), the material is preferably polypropylene resin (PP), polyphenylene sulfide resin (PPS), or the like.

FIG. 7 shows a surface of the seal plate 24 on the side pressed against the circulation board 7. FIG. 8 is a sectional view taken along the line BB of FIG.
FIG. 9 shows a CC cross section of FIG. 7, and FIG. 10 shows a DD cross section of FIG. As shown in FIGS. 7 to 10, the seal plate 24 is provided with a flow path 28 for flowing ink and a solvent, and is formed of a back plate 24A made of a synthetic resin or an iron plate and rubber. It is composed of an elastic member 24B.

The back plate 24A holds an elastic member 24B. In the elastic member 24B, a flow path 28 through which ink or a solvent flows is provided.
The U-shaped groove 24 having a U-shape as shown in FIG.
C, a bottomed circular receiving portion 24D that matches the inflow / outlet of each control component as shown in FIG. 10, and a bottomless circular receiving portion 24E as shown in FIG.

An opening is provided on one side of the U-shaped groove 24C and the bottomed circular receiving portion 24D, and the vicinity of the opening slightly protrudes from the surface of the back plate 24A. For example, in this embodiment, the protruding dimension is about 0.3 to 0.5 mm. The bottomless circular receiving portions 24E are both openings, and both sides thereof slightly protrude from the surface of the back plate 24A. For example, in the present embodiment, they protrude by about 0.5 mm from 0.3. I have.

The protruding portion is used to connect the seal plate 24 to the contact plate 25.
When pressed to the circulation board 7 side, it collapses to produce a sealing effect. Back plate 2 other than protrusion
The portion in contact with 4A is fixed to back plate 24A by bonding or baking.

The seal plate 24 is mounted such that the elastic member 24B side is the circulation board 7 side. The three parts are fastened with screws or the like in a state where the sealing plate 24 is sandwiched between the back plate 24A and the circulating board 7 by applying the abutment plate 25, so that each opening is formed in the circulating board. As a result, as shown in FIG. 15, a closed rectangular channel 28 'is formed.

The material of the back plate 24A is made of polybutylene terephthalate, because it is exposed to a thermal environment when the elastic member 24B is fixed by baking, and there is a demand for flatness and general mechanical strength after molding. Resin (PBT) and the like are preferable. The material of the elastic member 24B is most preferably rubber or the like, and among them, EPDM is most suitable. Further, as a material of the contact plate 25 for pressing the seal plate 24, a metal plate is suitable and a rigid iron plate is optimal. The flat plate 25 has an appropriate flatness for improving the sealing property.

Further, the seal plate 24 may be constituted by integrating the back plate 24A and the elastic member 24B and only the elastic member 24B. FIG. 11 shows the sealing plate 24 of FIG.
FIG. 12 is a sectional view taken along line BB in FIG.
FIG. 13 shows a cross section of FIG. 11 to 13
Is dimensionally the same as in FIGS. 8 to 10 and has the same operation and effect.

As shown in FIGS. 4 to 16, a circulation board 7 is provided.
Is provided with an ink container connection port 7A, and a solvent container connection port 7B is provided beside the ink container connection port 7A. The ink pressure connection port 7C is connected to a nozzle. Each connection port of the ink recovery connection ports 7D and 7E is also formed integrally with the circulation board 7. FIG. 4 shows a state in which the side surface of the ink circulation device 4 is viewed from the direction of the arrow P in FIG.

FIG. 5 shows the upper surface of the circulation board 7 of FIG. 2 from which the respective components have been removed.

In this respect, 13A, 14A, 18A, 22
Reference numerals A and 23A denote diaphragm housings (pressure chambers) of the electromagnetic valves, respectively, 13B, 14B, 18B, 22B,
Reference numerals 23B denote center holes of the electromagnetic valves, which serve as fluid inflow / outflow ports. Also, 13C, 14C, 18C, 22
C and 23C are annular concave portions provided around each central hole,
It serves as a fluid inflow / outflow port facing the center hole. Each of these diaphragm storage chambers (pressure chambers), each center hole, and each annular concave portion are a part of a main part of each electromagnetic valve and a part corresponding to a pipe connection part of a circulation part. These are formed integrally with the circulation board 7.

The pumps 8, 9, 10, and 11 are designed so that one motor 12 drives four pumps simultaneously. 8A to 11A are pressure chambers of each pump, 8B to 11B are suction ports, and 8C to 11C are discharge ports. Each of these pressure chambers, each of the suction ports, and each of the discharge ports are a part of a main part of the pump and a part corresponding to a pipe connection part of a circulation part. These are formed integrally with the circulation board 7. As shown in FIG. 14, a check valve 29 for preventing backflow of ink or solvent is provided at each suction port and discharge port.

17A is a diaphragm chamber of the pressure reducing valve 17, 17B is a pressure reducing valve inlet, and 17C is a pressure reducing valve outlet. These diaphragm chamber 17A, pressure reducing valve inlet 17
B, the pressure reducing valve outlet 17C is also a part of the main components of the pressure reducing valve 17 and at the same time, a part corresponding to the pipe connection part of the circulation part. These are formed integrally with the circulation board 7.

FIG. 6 shows the opposite side of the circulation board 7 of FIG. 5 and shows a state in which the seal plate 24 and the abutment plate 25 have been removed. FIG. 14 shows an AA cross section of FIG. Ink container connection port 7A, solvent container connection port 7B, pump suction port 8
B, 9B, pump outlets 8C, 9C, central holes 13B, etc. are provided with liquid inflow / outflow ports. In this way, the circulation board 7 is provided with a part of the components on one or both sides and a liquid inflow / outlet on one of the surfaces so as to be suitable for integral formation. The surface provided with the liquid inflow / outflow port is flattened to improve the sealing property.

As shown in FIG. 7, at both ends of the U-shaped groove portion 24C, a bottomed circular receiving portion 24D or a non-bottoming circular receiving portion 24E which is in position with the inlet / outlet of each control component is arranged. Put. The number of the bottomed circular receiving portion 24D of the present embodiment, there nineteen bottomed circular receiving portion 24D ₁ to 24D _19, a bottomless circular receiving portion 24E from a bottomless circular receiving portion 24E _{1 6} up to 24E 6
I have

[0037] For example, a bottomed circular receiving portion 24D ₁ is adapted to positionally match the holes 7B ₁ in communication with a solvent container connecting port 7B of FIG. 6, in communication with the ink container connecting port 7A the hole 7B ₁ has a bottomed circular receiving portion 24D ₂ is adapted to conform positionally. Similarly, the central hole 13 of the electromagnetic valve
B has a bottomed circular receiving portion 24D ₃ , 14B has 24D ₄ , 18
24D ₅ for B, 24D _{6 for} 22B, 24D for 23B
_The same applies to the inlet and outlet of other liquids such as ₇ .

Here, the circulation path of the ink and the solvent will be described with reference to FIGS. 6, 7, 14, and 15. The ink passes through a tube piped from the ink container 2 by the operation of the pump 8, and flows into the circulation board 7 from the ink container connection port 7A shown in FIG. Circulating ball - ink that has flowed into the de within 7 enters from hole 7A ₁ a bottomed circular receiving portion 24D _2, U
The opening of the U-shaped groove 24C flows through a square-shaped flow path 28 'formed by being closed by the circulation board 7, and the bottomed circular receiving portion 24D.
Through ₁₃ , it reaches the suction port 8B of the pump.

Thereafter, the ink is pumped to the pump 8 and
From the discharge port 8C through the bottom circular receiving portion 24D ₁₂ b-shaped flow channel 28 'having a bottom circular receiving portion 24D ₃ along, and flows into the center hole 13B of the solenoid valve 13. At this time, the electromagnetic valve 1
If 3 is opened, the ink flows to the B-shaped flow channel 28 'through a bottom circular receiving portion 24D ₈ from the annular recess 13C. Spilled ink flows into the main ink container 15 shown in FIG. 15 through a bottomless circular receiving portion 24E _3.

Similarly, the solvent sucked from the solvent container 3 is supplied to the solvent connection port 7B, the flow path 28, the suction port 9B, and the discharge port 9B.
C, the flow path 28, the central hole 14B of the electromagnetic valve 14, the annular recess 14C, the square-shaped flow path 28 ', and the main ink container 15.

As shown in FIG. 15, the solvent and the ink in the main ink container 15 are sucked into the suction port 10B of the pump 10, discharged from the discharge port 10C, and
8 ′ through the filter 16 through the pressure reducing valve inlet 1
Enter 7B. The ink adjusted to an appropriate pressure by the pressure-reducing valve 17 flows out of the pressure-reducing valve discharge port 17 </ b> C, and is
The ink is sent from the ink pressure connection port 7C to the nozzle 19 via the electromagnetic valve 18 along the line 8 '.

The ink is collected by the pump 11, and the collected ink flows into the main ink container 15 again.
In addition, the bottomed circular receiving portion 24D or the bottomless circular receiving portion 24E is always interposed as a square-shaped flow path 28 'of a connecting portion with each component.

FIG. 16 shows a process of assembling the electromagnetic valve on the circulation board 7 integrally formed with a portion corresponding to the piping connection portion of the electromagnetic valve. The electromagnetic valve 22 in the figure will be described as an example.

An electromagnetic valve 22 is provided on the upper surface of the circulation board 7.
In other words, a portion corresponding to the pipe connection portion, that is, the diaphragm accommodating chamber 22A, the center hole 22B, and the annular concave portion 22C are integrally formed.

Reference numeral 22E denotes a diaphragm, 22F denotes a plunger having one end connected to the diaphragm 22E,
The other end receives the extension force of the pressing spring 22G and the diaphragm 22
E is pressed against the center hole 22B. Reference numeral 22H denotes a fixed iron core, which receives the extension force of the pressing spring 22G. 22I
Is a bobbin around which a coil 22J is wound. 22K is yo
When the exciting current flows through the coil 22J, the plunger 22F, the fixed iron core 22H, and the base member 22D serve as a magnetic path. 22M is a spacer. This configuration is basically the same for the other electromagnetic valves 18 and 23. Next, assembling of the electromagnetic valve is performed as follows. 22M plunger 22F and diaphragm 22E
Connect the spacers. In the connected state, the plunger 22F, the 22M spacer, and the diaphragm 22E are fitted into the diaphragm storage chamber 22A with the diaphragm 22E first. In this state, screw 27
5. The screw penetrates through the seal plate 24 and the circulation board 7 and is screwed to a female screw portion provided in advance on the base member 22D. Thus, the assembly of the electromagnetic valve is completed. The procedure is substantially the same for assembling other control parts.

As described above, the circulation boat of this embodiment is
The part corresponding to the pipe connection part of the component of the fluid pumping means mounted on the upper surface of the board 7 is formed integrally with the circulation board 7, and these pipe connection parts are connected and connected by a square-shaped flow path 28 '. ing. Further, on the surface of the circulation board 7 in the plate thickness direction, there are provided respective connection ports for connection to the outside.

[0047]

According to the present invention, a part of each component of the fluid pumping means is integrally formed on one or both sides of one circulating board, so that not only the reduction of the direct material cost but also the assembling process. Can also be simplified. Also, by providing an inlet / outlet communicating with each fluid pumping means and inflow / outflow of the fluid on one of the surfaces, and a seal plate forming a flow path connecting each inflow / outlet to the circulation board by watertight fixing. Since the fluid pumping means are communicated with each other, the piping work is extremely reduced, and the number of assembling steps can be greatly reduced.

Also, since there is no space in the piping, the components of the fluid pumping means can be reduced in size, and the number of joints in the piping can be reduced, so that liquid leakage due to improper tightening of the joints can be eliminated.

[Brief description of the drawings]

FIG. 1 is a piping diagram of an entire inkjet recording apparatus including a circulation device according to an embodiment of the present invention.

FIG. 2 is a top view showing a state in which the components of the fluid pumping means are mounted on the circulation board of FIG.

FIG. 3 is a bottom view of the circulation board of FIG. 2;

FIG. 4 is a view as seen from the arrow P in FIG. 2;

FIG. 5 is a top view of the circulation board of FIG. 2 in a state where components on the circulation board are removed.

6 is a view opposite to the circulation board of FIG. 5 and showing a state in which a seal plate and an abutment plate are removed.

FIG. 7 is a view showing the surface of the seal plate on the side pressed against the circulation board.

FIG. 8 is a sectional view taken along the line BB of FIG. 7;

FIG. 9 is a sectional view taken along the line CC in FIG. 7;

FIG. 10 is a sectional view taken along the line DD in FIG. 7;

FIG. 11 is a sectional view taken along the line BB when the seal plate of FIG. 7 is constituted only by an elastic member.

FIG. 12 is a cross-sectional view of CC when the seal plate of FIG. 7 is formed only of an elastic member.

FIG. 13 is a DD sectional view when the seal plate of FIG. 7 is constituted only by an elastic member.

FIG. 14 is a sectional view taken along the line AA in FIG. 6;

FIG. 15 is a cross-sectional view of a circulation device according to an embodiment of the present invention, showing an example of a circulation path of ink and a solvent.

FIG. 16 is a view showing a process when assembling the electromagnetic valve.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Body case, 2 ... Ink container, 3 ... Solvent container, 4 ...
Circulating device, 5: control device, 6: print head, 7: circulating board, 8 to 11: pump, 12: motor, 13, 14,
18, 22, 23: electromagnetic valve, 16: filter, 1
7 ... pressure reducing valve, 19 ... nozzle, 20 ... ink particles, 21 ...
Ink recovery port, 24 ... seal plate, 24A ... back plate, 24B
... Elastic member, 25 ... Abutment plate, 26, 27 ... Screw, 28 ... Flow path, 28 '... R-shaped flow path

Continuation of the front page (56) References JP-A-7-205449 (JP, A) JP-A-56-86765 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B41J 2 / 175

Claims (7)

(57) [Claims] 1. A print head for ejecting ink particles to perform printing, an ink supply means for pressurizing ink in an ink holding container by a first fluid pressure supply means and supplying the ink to the print head, and a second fluid pressure supply means. Means for supplying a solvent from the solvent holding container to the print head by means, and both the ink and solvent not used for printing from the print head are collected in the ink holding container by a third fluid pumping means. In an ink jet recording apparatus comprising a collection unit and a circulating device having a piping including the flow paths of the two liquids connecting the components of the fluid pumping device and the fluid pumping devices, the circulating device is at least A circulation bob having a plurality of components for the plurality of fluid pumping means mounted on one surface and a plurality of inlets and outlets for communicating the fluid pumping means and inflowing and outflowing the two liquids on the other surface; - a de, each inlet connecting the outlet to form the flow path are opposed to said respective inlet outlet and said flow passage said circulating ball - possess a sealing plate for watertight secured to de, the seal
The plate is an elastic member forming the flow path having a protruding portion.
And a back plate holding the elastic body and fixed to the circulation board.
An ink jet recording apparatus characterized by consisting of a. 2. A print head for ejecting ink particles for printing, an ink supply means for pressurizing ink in an ink holding container by a first fluid pressure supply means and supplying the ink to the print head, and a second fluid pressure supply means. Means for supplying a solvent from the solvent holding container to the print head by means, and both the ink and solvent not used for printing from the print head are collected in the ink holding container by a third fluid pumping means. In an ink jet recording apparatus comprising a collection unit and a circulating device having a piping including the flow paths of the two liquids connecting the components of the fluid pumping device and the fluid pumping devices, the circulating device is at least A part corresponding to a pipe connection part of the components of the plurality of fluid pumping means is integrally formed on one surface, and the components of the plurality of fluid pumping means are mounted, and the other surface is mounted. A circulating board having a plurality of inlets and outlets communicating with the fluid pumping means for inflow and outflow of the two liquids; and forming the flow passages connecting the inlets and outlets, wherein the flow passages and the respective inlets and outlets are formed. the circulating ball to face the door - possess a sealing plate for watertight secured to de, the sealing plate having a projecting portion
An elastic member forming the flow path, and
An ink jet recording apparatus comprising: a back plate fixed to the circulation board . 3. The bullet according to claim 1 , wherein
An ink jet recording apparatus , wherein the sexual body is EPDM . 4. An ink jet recording apparatus according to claim 1, wherein said circulation board is formed of a synthetic resin and has an appropriate thickness and area. 5. The Te any smell of claims 1 to 4 <br/>, the circulation ball - the thickness direction of the surface of the soil, so as to provide a pipe connection port for coupling said flow path and the outside An ink jet recording apparatus characterized in that: 6. A print head for ejecting ink particles for printing, an ink supply means for pressurizing ink in an ink holding container by a first fluid pressure supply means and supplying the ink to the print head, and a second fluid pressure supply means. Means for supplying a solvent from the solvent holding container to the print head by means, and both the ink and solvent not used for printing from the print head are collected in the ink holding container by a third fluid pumping means. In an ink jet recording apparatus comprising a collection unit and a circulating device having a piping including the flow paths of the two liquids connecting the components of the fluid pumping device and the fluid pumping devices, the circulating device is at least A circulation bob having a plurality of components for the plurality of fluid pumping means mounted on one surface and a plurality of inlets and outlets for communicating the fluid pumping means and inflowing and outflowing the two liquids on the other surface; - de and the a sealing plate forming the flow path connecting between the inflow outlet, the sealing plate the circulating ball - possess a wear plate for watertight secured to de, the sealing plate projecting portions To
An elastic member forming the flow path, and holding the elastic body
And a back plate fixed to the circulation board . 7. A print head for ejecting ink particles for printing, an ink supply means for supplying ink to the print head by pressurizing ink in an ink holding container by a first fluid pressure supply means, and a second fluid pressure supply means. Means for supplying a solvent from the solvent holding container to the print head by means, and both the ink and solvent not used for printing from the print head are collected in the ink holding container by a third fluid pumping means. In an ink jet recording apparatus comprising a collection unit and a circulating device having a piping including the flow paths of the two liquids connecting the components of the fluid pumping device and the fluid pumping devices, the circulating device is at least A part corresponding to a pipe connection part of the components of the plurality of fluid pumping means is integrally formed on one surface, and the components of the plurality of fluid pumping means are mounted, and the other surface is mounted. A circulating board having a plurality of inlets and outlets communicating with the respective fluid pumping means and allowing the two liquids to flow in and out; a seal plate forming the flow path connecting the respective inlets and outlets; and a seal plate. A contact plate for water-tightly fixing the circulation board.
The seal plate forms the flow path having a protruding portion.
An elastic member that holds the elastic body and is fixed to the circulation board.
An ink jet recording apparatus characterized by comprising a back plate defined .