JP3859807B2 - Liquid ejection device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a liquid ejection apparatus for quantitatively ejecting a wearable liquid and other liquids used for forming an integrated circuit package or the like.
[0002]
[Background]
Conventionally, when manufacturing resin molded products such as integrated circuit packages, raw material resin slurry is filled into a mold in a certain amount. Various liquid ejection devices are used for this filling operation. Has been.
As a conventional example of this liquid ejection device, a container for storing a liquid to be ejected, a cylinder whose tip opening is contacted and isolated on the inner surface of the bottom of the container, a plunger provided in the cylinder so as to be movable forward and backward, and the container There is a liquid discharge device provided with a discharge port that is disposed on the inner surface of the bottom of the cylinder at a position covered by the opening of the cylinder tip and communicates with the outside, and a pinch valve mechanism that opens and closes a discharge pipe communicated with the discharge port (special Kaihei 4-50478).
[0003]
[Problems to be solved by the invention]
In the conventional example, the cylinder is advanced toward the discharge port to measure the liquid, and the plunger is advanced with the discharge pipe opened by the pinch valve mechanism, whereby the liquid is discharged from the discharge pipe through the discharge port. However, since there is a predetermined distance between the discharge port located at the tip of the plunger and the pinch valve mechanism, there is a problem in that liquid stays by this distance.
If the liquid stays for a long time, for example, when the apparatus is stopped, there is a problem that the liquid changes in quality when it is a chemical solution and solidifies when it is an adhesive.
Furthermore, since the drive system of the cylinder and plunger and the drive system of the pinch valve are configured separately, there is a problem that the apparatus cannot be made compact.
Further, the pinch valve mechanism functions as an outlet side valve. However, the pinch valve mechanism has a problem that the discharge port cannot be sufficiently closed and the liquid to be discharged is not sufficiently sharp.
[0004]
An object of the present invention is to provide a liquid discharge apparatus that can perform a fixed amount discharge without causing liquid leakage and does not retain liquid.
[0005]
[Means for Solving the Problems]
Therefore, according to the present invention, the inner valve, the discharge member, and the outer valve are arranged concentrically in the container, and the seal structure of the inner valve and the outer valve is formed with a lip at the portion that comes into contact with the elastic packing member and the packing member. It is intended to achieve the object by comprising a sealing member in which a concave portion is formed.
[0006]
Specifically, the liquid ejection device according to the present invention includes a container having an ejection port for storing the liquid and ejecting the liquid to the outside, an inner valve disposed in the container and opening and closing the ejection port, A substantially cylindrical discharge member that is concentrically arranged outside the inner valve and that discharges liquid with respect to the discharge port in the container, and a concentric circle outside the discharge member in the container. An outer valve that allows or prevents liquid from flowing into a space between the inner valve, an inner valve driving means that opens and closes the inner valve, and a discharge member that drives the discharge member forward and backward A driving means and an outer valve driving means for opening and closing the outer valve. The inner valve and the outer valve are provided on the entire circumference of the discharge port, respectively, and are elastically deformable packing members. Abutting seal With a seal structure having a member, the packing member abutting portion of the sealing member is characterized in that the recess lip formation is formed continuously.
[0007]
In the present invention having this configuration, for example, while the liquid is stored in the container, the outer valve is operated to open the outer valve, the inner valve is operated to close the inner valve, and the discharge member is driven. The discharge member is retracted from the discharge port by means.
Then, the liquid is sucked between the inner valve and the outer valve as the discharge member moves backward.
Thereafter, the outer valve is closed by the outer valve driving means, the liquid is measured, the inner valve is opened by the inner valve driving means, and the discharge member is advanced toward the discharge port by the discharge member driving means. The liquid is discharged from the discharge port.
[0008]
When the outer valve and the inner valve are closed, the sealing member is in contact with the packing member. The packing member is made of an elastically deformable material such as Teflon, and the sealing member is made of metal or the like. Since the lip forming recess is formed, the packing member is elastically deformed into the lip forming recess formed in the sealing member to form a lip.
When the lip is formed, the sealing area between the packing member and the sealing member is increased, and the lip is pressed against the lip forming recess of the sealing member due to the pressure difference between the inside and outside of these lips. Thereby, the inflow of the liquid to a discharge outlet is blocked | prevented reliably and a liquid leak is prevented.
[0009]
In the present invention, if the discharge member is advanced toward the discharge port, the space between the inner valve and the outer valve is closed, and the liquid does not stay in the space therebetween.
A sealing structure in which the contact portion between the packing member and the sealing member is formed in a tapered shape without forming a lip forming recess in the sealing member is also conceivable. However, the sealing member contacts and separates from the packing member. By repeating this process, the sealing surface may be rubbed and the liquid may leak.
[0010]
Here, in the present invention, the sealing member of the inner valve may be formed in a cylindrical shape, and the inside thereof may be provided with a sweeping means for sweeping liquid out from the discharge port.
In this structure, at a predetermined time, for example, the discharge port is opened by the inner valve, and at the same time, the sweeping means is operated to sweep out the liquid near the discharge port.
As a result, even the last drop of the liquid can be discharged securely and reliably.
Further, the sweeping means may be composed of an air ejector that blows off liquid with gas.
In this configuration, since the liquid can be blown away in a non-contact state by the air ejector, it is possible to improve liquid breakage.
[0011]
In the present invention, the inner valve driving means, the discharge member driving means, and the outer valve driving means may be constituted by linear driving means, and these linear driving means may be arranged in parallel.
In this structure, by arranging the drive systems in parallel, the apparatus becomes compact without extending in the longitudinal direction of the linear drive means.
Further, the linear drive means may be composed of an air cylinder.
When the linear drive means is composed of an air cylinder, not only can the valve open / close operation and the liquid discharge operation by the discharge member be performed instantaneously, but the operation limit can be easily adjusted by using a stopper.
[0012]
Still further, the inner valve, the discharge member, and the outer valve may each be entirely disposed inside the container.
In this configuration, it is possible to prevent liquid in the container from leaking out of the container from the valve due to capillary action.
That is, since the inner valve, the discharge member, and the outer valve are concentric and the gap between these members is small, the liquid in the container tends to move through the gap due to capillary action. If the end opposite to the discharge port of these members is exposed to the outside of the container, the liquid in the container leaks to the outside, but in the present invention, all of these members are in the container. Therefore, even if the liquid moves due to capillary action, it does not leak out of the container.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
Here, in each embodiment, the same component is attached | subjected with the same code | symbol, and description is abbreviate | omitted.
1 to 9 show a first embodiment of the present invention.
FIG. 1 is a front view in which a part of a dispenser including the liquid ejection device according to the first embodiment is broken, and FIG. 2 is a side view in which a part of the dispenser is broken.
In these figures, the dispenser 1 is provided with two systems of liquid ejection devices 2 for quantitatively ejecting two kinds of wearable liquids simultaneously.
The dispenser 1 includes three substrates 3 to 5 that are horizontally arranged. The substrate 4 is supported above the substrate 3 by a plurality of columns 6, and the substrate 5 is above the substrate 4 by a plurality of columns 7. It is supported by.
[0014]
A pair of containers 8 is installed on the substrate 3. The container 8 is formed in an inverted convex shape having an upper surface opened and a bottom portion protruding downward.
One end of a discharge nozzle 9 for discharging the internal liquid is connected to the lower portion of the container 8.
A discharge nozzle 10 is attached to the bottom of the container 8. The discharge nozzle 10 is formed in a substantially disk shape having an upper end portion provided inside the container 8 and has a lower end portion projecting downward from the substrate 3. A discharge port 10 </ b> A extends vertically in the center of the discharge nozzle 10. Is formed.
[0015]
Inside the container 8, an inner valve 11 that opens and closes the discharge port 10 </ b> A, a substantially cylindrical discharge member 12 that is disposed concentrically outside the inner valve 11 and discharges a liquid, and the discharge member 12 Outer valves 13 that are concentrically arranged on the outer side and allow or block the inflow of liquid in a space between the inner valve 11 and the outer valve 13 are respectively arranged as a whole.
The inner valve 11 includes a packing member 14 provided over the entire circumference of the discharge port 10 </ b> A, a cylindrical sealing member 15 capable of contacting the packing member 14, and a sealing member of the adjacent liquid discharge device 2. The connecting rod 16 which connects 15 is provided, and the sealing structure is comprised from the packing member 14 and the cylindrical sealing member 15. FIG.
[0016]
The packing member 14 is formed in a substantially thick ring shape from a member such as Teflon having high chemical resistance and elasticity.
The sealing member 15 is made of a material such as stainless steel having a high chemical resistance, and its tip sectional shape is shown in FIG.
In FIG. 4, the sealing member 15 is formed with a lip forming recess 15 </ b> A over the entire circumference of the portion in contact with the packing member 14. The lip forming recesses 15A are multiple, triple in FIG.
[0017]
1 and 2, the sealing member 15 is provided with a sweeping means 17 for sweeping the liquid from the ejection port 10A to the outside.
The sweeping means 17 is an air ejector that blows off liquid with air, liquid nitrogen, or other gas, and this air ejector is connected to the connecting rod 16 through a communication hole 17 formed in the sealing member 15 and the connecting rod 16. The compressed gas is sent from the air supply pipe 18.
[0018]
The discharge member 12 is formed in a cylindrical shape that covers the outer periphery of the sealing member 15 of the inner valve, and can be advanced and retracted with respect to the packing member 14 and the discharge port 10A.
A flange 19 extending in one direction orthogonal to the axial direction of the discharge member 12 is attached to the base end of the discharge member 12.
Drive rods 20 are attached to both ends of the flange 19 in parallel with the longitudinal direction of the discharge member 12, and these drive rods 20 are connected to each other by connecting rods 21 at their ends.
[0019]
The outer valve 13 includes the packing member 14, a short cylindrical sealing member 22 whose tip can be brought into contact with the packing member 14, and a shaft of the sealing member 22 at the base end of the sealing member 22. A flange 23 attached to extend in one direction orthogonal to the direction; drive rods 24 attached to both ends of the flange 23 in parallel with the longitudinal direction of the sealing member 22; and sealing of adjacent liquid ejection devices 2 A connecting rod 25 that connects the members 22 to each other is provided.
The sealing member 22 has the same structure as the sealing member 15 of the inner valve 11.
The flange 23 and the flange 19 are arranged orthogonally to each other (see FIG. 3).
[0020]
The substrate 4 includes an inner valve driving means 26 that opens and closes the inner valve 11, a discharge member driving means 27 that drives the discharge member 12 forward and backward with respect to the packing member 14, and an outer valve that drives the outer valve 13 to open and close. Driving means 28 are attached to each.
The inner valve driving means 26, the discharge member driving means 27, and the outer valve driving means 28 are each composed of an air cylinder as a direct driving means, and these air cylinders are arranged substantially in parallel with being separated from each other by a predetermined distance.
[0021]
The inner valve driving means 26 includes a casing 26A fixed to the substrate 4 and a driving rod 26B provided so as to be able to advance and retreat in the casing 26A. The lower end of the drive rod 26B is fixed to the connecting rod 16 of the inner valve 11, and the upper end of the drive rod 26B can be brought into contact with a positioning bolt 29 screwed into the substrate 5. The positioning bolt 29 is attached to the substrate 5 so as to be able to advance and retreat with respect to the inner valve driving means 26. By adjusting the advance / retreat amount, the retraction amount of the drive rod 26B, and consequently the drive rod 26B. The retraction amount of the sealing member 15 of the inner valve 11 connected to can be adjusted.
[0022]
The discharge member driving means 27 includes a casing 27A fixed to the substrate 4 and a drive rod 27B provided in the casing 27A so as to be able to advance and retract.
The drive rod 27 </ b> B has a lower end fixed to the connecting rod 21 of the discharge member 12 and an upper end penetrating the substrate 5.
A micrometer 30 is mounted on the substrate 5 via a gate-shaped mounting member 31 above the ejection member driving means 27.
The micrometer 30 has a spindle 30A that is arranged coaxially with the connecting rod 21 and whose tip can be brought into contact with the end of the connecting rod 21, and is driven by adjusting the advance / retreat amount of the spindle 30A. The liquid discharge amount can be adjusted by adjusting the retraction amount of the discharge member 12 connected to the rod 27B and the drive rod 27B.
[0023]
The inner valve drive means 28 is composed of a casing 28A fixed to the substrate 4 and a drive rod 28B provided so as to be able to advance and retreat within the casing 28A. The lower end of the drive rod 28B is fixed to the connecting rod 25 of the outer valve 13, and the upper end of the drive rod 28B can be brought into contact with a positioning bolt 29 screwed into the substrate 5.
The positioning bolt 29 is attached to the substrate 5 so as to be able to advance and retreat with respect to the outer valve drive means 28. By adjusting the advance / retreat amount, the retraction amount of the drive rod 28B, and consequently the drive rod 28B. The amount of retraction of the sealing member 22 of the outer valve 13 connected to can be adjusted.
The sweeping means 17, the inner valve driving means 26, the discharge member driving means 27, and the outer valve driving means 28 are connected to a control means (not shown). Control is performed according to the time chart (see FIG. 5).
[0024]
Next, the operation of the first embodiment will be described with reference to FIGS.
FIG. 5 is a time chart for driving the sweeping means 17, the inner valve driving means 26, the ejection member driving means 27 and the outer valve driving means 28, and FIGS. 6 to 8 are diagrams for explaining the operation of the liquid ejection device 2. FIG. 9 is an explanatory view of the operation of the seal structure. 6 to 8 are different from FIG. 2 in order to make the operation states of the inner valve driving means 26, the discharge member driving means 27, and the outer valve driving means 28 easier to understand.
[0025]
First, as shown in the time chart of FIG. 5, when a start signal is transmitted, the outer valve driving means 28 is operated. Then, as shown in FIG. 6A, the outer valve 13 is opened, and the sealing member 22 is separated from the packing member 14. The sealing member 22 moves until the drive rod 28B of the outer valve drive means 28 comes into contact with the positioning bolt 29. In this state, the discharge member 12 is in contact with the packing member 14 and the inner valve 11 is closed.
Thereafter, as shown in FIG. 5, the discharge member driving means 27 is operated. Then, as shown in FIG. 6B, the discharge member 12 is separated from the packing member 14, and the liquid in the container 8 enters the space between the inner valve 11 and the outer valve 13. The ejection member 12 moves until the drive rod 27B of the ejection member driving means 27 contacts the spindle 30A of the micrometer 30.
[0026]
Here, in order to increase the liquid discharge amount, the spindle 30 </ b> A is fixed at a position away from the connecting rod 21. As a result, the retraction amount of the drive rod 27B, and hence the retraction amount of the discharge member 12, increases, and as a result, the amount of liquid that can be discharged by the discharge member 12 increases. On the other hand, in order to reduce the liquid discharge amount, the spindle 30A is fixed at a position close to the connecting rod 21. Then, the retraction amount of the drive rod 27B, and hence the retraction amount of the discharge member 12, becomes small, and as a result, the amount of liquid that can be discharged by the discharge member 12 decreases.
[0027]
Thereafter, as shown in FIG. 5, the operation of the outer valve driving means 28 is stopped. Then, as shown in FIG. 7C, the outer valve 13 is closed and the sealing member 22 comes into contact with the packing member 14. Thereby, the discharged liquid is measured.
Further, as shown in FIG. 5, the inner valve driving means 26 and the air ejector 17 are operated. Then, as shown in FIG. 7D, the inner valve 11 is opened, the sealing member 15 is separated from the packing member 14, and the discharge port 10A is opened. Further, gas is blown out from the internal space of the sealing member 15 toward the discharge port 10A.
[0028]
Thereafter, as shown in FIG. 5, the operation of the ejection member driving means 27 is stopped. Then, as shown in FIG. 8E, the discharge member 12 advances toward the packing member 14 and the discharge port 10A, and the liquid that has entered the space between the inner valve 11 and the outer valve 13 is discharged to the discharge port 10A. It is discharged from. In this state, since the air ejector 17 is in operation, the liquid is discharged from the discharge port 10A with good quality.
Thereafter, as shown in FIG. 5, the operation of the inner valve driving means 26 and the air ejector 17 is stopped. Then, as shown in FIG. 8F, the inner valve 11 is closed, the sealing member 15 is brought into contact with the packing member 14, and the discharge port 10A is closed.
[0029]
Here, in a state where the outer valve 13 and the inner valve 11 are opened, the sealing member 15 (22) is separated from the packing member 14 as shown in FIG. 13 and the inner valve 11 are closed, the sealing members 15 and 22 press the packing member 14 as shown in FIG. 9B. Then, the packing member 14 is elastically deformed into the lip forming recess 15A formed in the sealing members 15 and 22, and lips are formed in multiple layers. These lips prevent the flow of liquid inside and outside the valve.
[0030]
Therefore, according to the first embodiment, (1) the container 8 that stores the liquid and has the discharge port 10A, the inner valve 11 that is disposed in the container 8 and opens and closes the discharge port 10A, and the discharge port 10A In contrast, a substantially cylindrical discharge member 12 that can be moved forward and backward, an outer valve 13 that allows or blocks the inflow of liquid into the space between the inner valve 11, and an inner valve driving means that opens and closes the inner valve 11. 26, a discharge member drive means 27 that drives the discharge member 12 forward and backward, and an outer valve drive means 28 that drives the outer valve 13 to open and close. The inner valve 11, the discharge member 12, and the inner valve 13 are inner valves. 11, the inner valve 11 and the outer valve 13 are respectively provided on the entire circumference of the discharge port 10A and can be elastically deformed, and the packing member 14 is concentrically arranged in the container 8. Abut Since the sealing member having the stop members 15 and 22 is provided, and the lip forming recess 15A is continuously formed in the portion of the sealing members 15 and 22 that contacts the packing member 14, the outer valve 13 and the inner valve 11 is closed, the sealing members 15 and 22 are pressed against the packing member 14 respectively, so that the packing member 14 is elastically deformed into the lip forming recess 15A formed on the sealing members 15 and 22. As a result, a lip is formed, the seal area between the packing member 14 and the sealing members 15 and 22 is increased, and the inflow of liquid into the discharge port 10A is reliably prevented, thereby preventing liquid leakage. Is done.
In addition, if the discharge member 12 is moved forward toward the discharge port 10A, the space between the inner valve 11 and the outer valve 13 is blocked, and liquid does not stay in the space therebetween. Therefore, even when the dispenser 1 is not operated for a long period of time, it is possible to avoid inconveniences associated with liquid retention.
[0031]
In the first embodiment, {circle around (2)} the sealing member 15 of the inner valve 11 is formed in a cylindrical shape, and a sweeping means 17 for sweeping liquid from the discharge port 10 </ b> A to the outside is provided therein. To the last drop of liquid, it can be reliably discharged. (3) Since the sweeping means 17 is composed of an air ejector that blows off the liquid with gas, the liquid can be blown off in a non-contact state, so that the liquid breakage can be improved.
In the first embodiment, (4) the inner valve driving means 26, the discharge member driving means 27, and the outer valve driving means 28 are each constituted by linear driving means, and these linear driving means are arranged in parallel. Becomes compact without extending in the longitudinal direction of the linear drive means 26-27.
[0032]
Further, (5) since these linear drive means are constituted by air cylinders, not only can the valves 11 and 13 be opened and closed and the liquid discharge operation by the discharge member 12 can be performed instantaneously, but also by using the stoppers 29 and 30. The operating limit can be easily adjusted.
Furthermore, (6) the inner valve 11, the discharge member 12 and the outer valve 13 are all arranged inside the container 8, so that the capillarity causes the valves 11, 13 to move into the container 8. The liquid can be prevented from leaking out of the container 8.
[0033]
Next, a second embodiment of the present invention will be described with reference to FIGS.
In the second embodiment, the inner valve driving means 26, the discharge member driving means 27, and the outer valve driving means 28 are provided in one liquid discharge device 32, respectively, and these means 26 to 27 are arranged adjacent to each other. Unlike the embodiment, the other main components are the same as those of the first embodiment.
10 is a front view in which a part of the liquid ejection device 32 of the second embodiment is broken, FIG. 11 is a side view thereof, and FIG. 12 is a cross-sectional view showing the detailed structure of the inner valve 11, the ejection member 12 and the outer valve 13. It is.
[0034]
In these drawings, the inner valve 11, the discharge member 12 and the outer valve 13 are partially exposed inside the container 38.
The inner valve 11 includes a packing member 14 provided over the entire circumference of the discharge port 10 </ b> A, and a cylindrical sealing member 15 that can come into contact with the packing member 14. In the second embodiment, the air ejector is not shown.
The discharge member 12 is formed in a cylindrical shape that covers the outer periphery of the sealing member 15 of the inner valve, and can be advanced and retracted with respect to the packing member 14 and the discharge port 10A.
The flange 19 is attached to the base end of the discharge member 12, and the drive rod 20 is attached to both ends of the flange 19, and the drive rods 20 are connected to each other by a connecting rod 21 at their ends. ing.
The outer valve 13 includes the packing member 14, the sealing member 22, the flange 23, the drive rod 24, and a connecting rod 25 that connects the adjacent sealing members 22 to each other.
[0035]
The inner valve driving means 26 for driving the inner valve 11 to open and close, the discharge member driving means 27 for driving the discharge member 12 forward and backward, and the outer valve driving means 28 for driving the outer valve 13 to open and close each include a box-shaped casing. These casings are arranged side by side with no gaps.
In the second embodiment, the operation method is the same as in the first embodiment.
Therefore, in the second embodiment, in addition to the effects (1) to (5) of the first embodiment, the inner valve driving means 26, the discharge member driving means 27 and the outer valve driving means 28 are provided. Since it is arranged side by side with no gap, the overall structure of the apparatus can be made more compact.
[0036]
The present invention is not limited to the embodiments described above, and includes the following modifications as long as the object of the present invention can be achieved.
For example, in each of the above embodiments, the sweeping means 17 is constituted by an air ejector, but the present invention does not necessarily require the sweeping means 17 to be provided. Even if the sweeping means 17 is provided, it may be constituted by other means such as an ejector pin.
[0037]
Further, even when the sweeping means 17 is constituted by an air ejector, the timing of blowing out the gas is not limited to that of the above embodiment. For example, the air ejector may be operated simultaneously with the discharge of the liquid by the discharge member 12.
The inner valve driving means 26, the discharge member driving means 27, and the outer valve driving means 28 are constituted by air cylinders, but a ball screw, a rack and pinion or the like may be used instead of the air cylinder.
Further, three or more liquid ejection devices 2 may be arranged to eject three or more liquids.
[0038]
【The invention's effect】
As described above, according to the liquid ejection device of the present invention, it is possible to perform quantitative ejection without liquid leakage, and there is an effect that there is no liquid retention.
[Brief description of the drawings]
FIG. 1 is a front view, partly broken, of a dispenser provided with a liquid ejection device according to a first embodiment of the present invention.
FIG. 2 is a side view in which a part of the dispenser is broken.
FIG. 3 is a cross-sectional view taken along line III-III in FIG.
FIG. 4 is a cross-sectional view showing a tip shape of a sealing member.
FIG. 5 is a time chart for driving the sweeping means, the inner valve driving means, the discharge member driving means, and the outer valve driving means.
FIGS. 6A and 6B are operation explanatory diagrams of the liquid ejection apparatus. FIGS.
FIGS. 7C and 7D are explanatory diagrams of the operation of the liquid ejection apparatus. FIGS.
FIGS. 8E and 8F are explanatory views of the operation of the liquid ejection apparatus. FIGS.
FIGS. 9A and 9B are explanatory views of the operation of the seal structure.
FIG. 10 is a front view in which a part of a liquid ejection apparatus according to a second embodiment is broken.
FIG. 11 is a side view in which a part of the liquid ejection device is broken.
FIG. 12 is a cross-sectional view showing a detailed structure of an inner valve, a discharge member, and an outer valve.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Dispenser 2,32 Liquid discharge apparatus 8,38 Container 10A Discharge port 11 Inner valve 12 Discharge member 13 Outer valve 14 Packing member
15,22 Sealing member 15A Lip forming recess 17 Sweep means 26 Inner valve drive means 27 Discharge member drive means 28 Outer valve drive means

Claims (6)

A container having a discharge port for storing the liquid and discharging the liquid to the outside; an inner valve disposed in the container for opening and closing the discharge port; and capable of moving forward and backward with respect to the discharge port in the container; A space between a substantially cylindrical discharge member that is concentrically disposed outside the inner valve and discharges liquid, and a concentric circle that is disposed concentrically outside the discharge member in the container. An outer valve that allows or blocks the inflow of liquid, an inner valve driving means that opens and closes the inner valve, a discharge member driving means that drives the discharge member forward and backward, and an outer valve that opens and closes the outer valve Driving means, and the inner valve and the outer valve each have a sealing structure that is provided on the entire circumference of the discharge port and is elastically deformable, and a sealing member that comes into contact with the packing member, Said seal Liquid discharge apparatus characterized in that it is formed continuously recess lip formed in the packing member abutting portion of the member. 2. The liquid discharge apparatus according to claim 1, wherein the sealing member of the inner valve is formed in a cylindrical shape, and inside thereof, there is provided a sweeping means for sweeping liquid from the discharge port to the outside. A liquid ejection device. 3. The liquid ejecting apparatus according to claim 2, wherein the sweeping means is an air ejector that blows off the liquid with a gas. 4. The liquid ejection device according to claim 1, wherein the inner valve driving means, the ejection member driving means, and the outer valve driving means are each constituted by direct driving means, and these linear driving means are arranged in parallel. A liquid ejecting apparatus, wherein 5. The liquid ejection apparatus according to claim 4, wherein the linear drive means is an air cylinder. 6. The liquid ejection device according to claim 1, wherein the inner valve, the ejection member, and the outer valve are all disposed inside the container.

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