JPH08168526A - Airtight container - Google Patents

Abstract

PURPOSE: To provide satisfactory airtightness for both pressure increase and decrease inside the container by providing the main body of the container and a lid body with first and second seal members with different flexibility levels respectively, concerning the airtight container with which liquid is fed and absorbed by increasing and decreasing the pressure of a flexible bag while using a dialysis liquid exchange device. CONSTITUTION: This airtight container 1 is provided with a casing 2 with a built-in main body 3 of the container, and the main body 3 of the container is closed by a lid body 4 which can be opened and closed. The closed state of the lid body 4 is held by a lock means 6 and at the time of closing, the main body 3 and the lid body 4 are sealed by a seal means 5. In such a sealed state, pressure inside a housing space 30 for the main body 3 of the container is decreased/increased by a pressure decreasing/increasing device 7. This seal means 5 is composed of a first seal member 51 fixed on the inner surface of a groove part 31 and a second seal member 52 fixed at a position corresponding to the first seal member 51 inside the lid body 4, and the second seal member 52 is formed by a constitutive material whose flexibility is higher than that of the first seal member 51.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a closed container, for example, a closed container used in a dialysate exchange device for feeding and absorbing a liquid by pressurizing and depressurizing a flexible bag.

[0002]

2. Description of the Related Art Of the peritoneal dialysis methods, particularly continuous ambulatory peritoneal dialysi
s, hereinafter referred to as “CAPD”), which allows patients to exchange the dialysate containers (bags) themselves at home or at work, which makes it easier for them to return to society and is receiving much attention.

In this CAPD, a catheter tube (peritoneal catheter) is placed in the abdominal cavity of a patient, a transfer tube is connected to the external end of the catheter tube, and a dialysate bag containing a fresh dialysate (injection bag). ) Is connected to the bag tube, the dialysate in the bag is injected into the abdominal cavity through each tube, and after dialysis for a predetermined time, the dialysate drainage solution in the abdominal cavity is passed through the tubes,
It is collected in the drain bag. The tubes are connected to each other aseptically by fitting male and female connectors mounted on the ends of both tubes.

In recent years, a dialysate exchange device for automatically exchanging the dialysate in CAPD has been proposed.
This dialysate exchange device is equipped with a pressurizing chamber and a depressurizing chamber. The dialysate bag in the dialysate bag is put into the pressurizing chamber and pressurized so that the dialysate in the bag is injected into the abdominal cavity of the patient through each tube. On the other hand, the drainage bag is placed in a decompression chamber and decompressed so that the dialysate drainage solution in the abdominal cavity is sucked and collected in the drainage bag through each tube.

Sealing members are used in such pressurizing chambers and depressurizing chambers in order to maintain airtightness. However, since these sealing members are conventional O-rings and packings, airtightness is limited. The pressure cannot be raised or lowered to the required level during pressurization or depressurization. Therefore, in order to improve the airtightness, it is necessary to process the mounting portion and the close contact portion of the seal member with high precision and smoothness, or to design the seal member to apply an extremely large pressure-bonding force,
The manufacturing cost was increased and the operability was poor.

Further, pressurization / pressurization capable of both pressurization and depressurization
When the decompression chamber is configured, the sealing member cannot maintain airtightness both when the internal pressure is positive pressure and when it is negative pressure.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a closed container which is excellent in airtightness, and particularly exhibits excellent airtightness against both pressurization and depressurization of the container.

[0008]

The above objects are achieved by the present invention described in (1) to (6) below.

(1) A hermetically sealed container having a container body having a storage space inside, a lid body that can be opened and closed with respect to the container body, and sealing means installed at a joint portion between the container body and the lid body. The sealing means is installed on one of the container body and the lid body, and on the other of the container body and the lid body, the first sealing member And a second seal member that comes into contact with the second seal member, wherein the constituent material of the second seal member is more flexible than the constituent material of the first seal member.

(2) A hermetically sealed container having a container body having a storage space inside, a lid body that can be opened and closed with respect to the container body, and sealing means installed at a joint portion between the container body and the lid body. Wherein the sealing means is a first seal member made of an elastic material, which is installed on one of the container body and the lid, and the other of the container body and the lid, A second seal member having a recess into which the tip end portion of the first seal member fits, and the first seal member has a pair of protrusions respectively contacting the inner surfaces of the recess facing each other. A closed container characterized by.

(3) A hermetically sealed container having a container body having a storage space inside, a lid body that can be opened and closed with respect to the container body, and sealing means installed at a joint portion between the container body and the lid body. The sealing means has a sealing member made of an elastic material, which is installed on one of the container body and the lid, and the sealing member is the other of the container body and the lid. A hermetically sealed container, characterized in that it has a pair of protrusions that are deformed such that their tips are separated from each other at the time of sealing, on the side in contact with.

(4) A closed container having a container body having a storage space inside, a lid body which can be opened and closed with respect to the container body, and a sealing means installed at a joint portion between the container body and the lid body. The sealing means has a sealing member made of an elastic material, which is installed on one of the container body and the lid, and the sealing member has a wavy cross section. An airtight container characterized by being present.

(5) A hermetically sealed container having a container body having a storage space inside, a lid body that can be opened and closed with respect to the container body, and sealing means installed at a joint portion between the container body and the lid body. The sealing means has a sealing member made of an elastic material, which is installed on one of the container body and the lid, and the sealing member is at least one of the container body and the lid. A closed container having a hollow structure on the side in contact with the other.

(6) A container main body having a storage space inside, a lid that can be opened and closed with respect to the container main body, and a hollow structure made of an elastic material installed at a joint between the container main body and the lid. A seal member, and a seal drive means capable of supplying a working fluid to the hollow portion of the seal member, wherein the drive means supplies a working fluid to the hollow portion of the seal member to expand the seal member. A sealed container, characterized in that the joint is sealed.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The closed container of the present invention will be described below in detail with reference to the preferred embodiments shown in the accompanying drawings.

FIG. 1 is a sectional side view showing an embodiment of the hermetically sealed container according to the present invention, and FIG. 2 is an enlarged sectional view showing a joint between a container body and a lid of the hermetically sealed container shown in FIG. The closed container 1 of the present invention is installed in a dialysate exchange device in peritoneal dialysis, and is used as a pressurizing / depressurizing chamber for pressurizing and depressurizing a dialysate bag and a drainage bag, respectively.
As shown in FIG. 1, a casing 2, a container body 3, a lid 4 that can be opened and closed with respect to the container body 3, and a sealing unit 5 installed at a joint 50 between the container body 3 and the lid 4. Lid 4
It is composed of a lock means 6 for holding the container in a closed state and a decompression / pressurization device 7 for decompressing / pressurizing the inside of the container body 3.

Inside the box-shaped casing 2, a container body 3 is formed by subjecting a metal plate having a relatively high specific strength, such as aluminum or an aluminum alloy, to plastic working.
Is installed. As shown in FIG. 2, this container body 3
Is supported and fixed to the casing 2 by a screw 21 at its upper edge portion. A storage space 30 for storing a dialysate bag, a drainage bag, and the like is formed inside the container body 3. The storage space 30 functions as a decompression chamber or a pressure chamber.

An upper portion of the container body 3 is open, and a groove portion 31 for installing a first seal member 51, which will be described later, is formed around the opening, that is, in an upper edge portion of the container body 3.

The lid 4 is rotatably supported by a shaft 41 at one end portion (left side in FIG. 1) of the lid 4 so as to shield the upper opening of the container body 3 with the lid 4 closed. It is configured. The lid 4 is made of acrylic resin,
It is composed of a thermoplastic resin such as polycarbonate.

As shown in FIG. 2, the shaft 41 has a support member 4
The supporting member 42 is fixed to the lid 4 with screws 43. Also, the shaft 41
Are rotatably supported by a plurality of plate-shaped bearing members 22, and the bearing members 22 are fixed to the upper portion of the casing 2 by screws 23.

Locking means 6 is installed at the other end (right side in FIG. 1) of the lid 4. This locking means 6
Is composed of a pin 61 fixed to the lid 4 side and a hook 62 that can be locked to the pin 61. Hook 62
Is operated by operating a handle (not shown).
Around the center. As shown by the solid line in FIG. 1, when the hook 62 is rotated and locked to the pin 61 with the lid 4 closed, the lid 4 is locked in the closed state.

A depressurizing / pressurizing device 7 is installed in the casing 2. The decompression / pressurization device 7 includes a decompression pump 71, a pressure pump 72, an air supply pipe 73 having a proximal end connected to the decompression pump 71, and a proximal end having the pressure pump 7.
2 is connected to the air supply pipe 74, and solenoid valves 75 and 76 installed in the middle of the air supply pipes 73 and 74, respectively. The tip ends of the air supply pipes 73 and 74 respectively penetrate the wall portion of the container body 3 and communicate with the storage space 30. A vacuum pump such as a rotary pump is used as the decompression pump 71 and the pressurization pump 72.

Next, the operation of the pressure reducing / pressurizing device 7 will be described. The lid 4 is closed and locked by the locking means 6 to seal the container body 3. In this state, when the solenoid valve 75 is opened, the solenoid valve 76 is closed, and the decompression pump 71 is operated, the air in the storage space 30 is exhausted to the outside of the casing 2 through the air supply pipe 73, and the storage space 30 is depressurized. It When the storage space 30 reaches a predetermined pressure (negative pressure), the solenoid valve 75
And the operation of the decompression pump 71 is stopped.
As a result, the depressurized state of the storage space 30 is maintained. When the solenoid valve 75 or 76 is opened, outside air flows into the storage space 30 via the air supply pipe 73, and the storage space 30 returns to atmospheric pressure.

On the other hand, when the electromagnetic valve 75 is closed, the electromagnetic valve 76 is opened, and the pressurizing pump 72 is operated while the container body 3 is sealed, the outside air is introduced into the storage space 30 through the air supply pipe 74, The storage space 30 is pressurized. When the storage space 30 reaches a predetermined pressure (positive pressure), the solenoid valve 76 is closed and the operation of the pressurizing pump 72 is stopped. This allows
The pressurized state of the storage space 30 is maintained. When the electromagnetic valve 75 or 76 is opened, the air in the storage space 30 is discharged to the outside of the casing 2 via the air supply pipe 74, and the storage space 30 returns to atmospheric pressure.

When decompressing the drainage bag and pressurizing the dialysate bag using the closed container 1, the storage space 3
0 pressure has a head difference of −1.
3~-0.7mH ₂ O approximately, in the pressurized state, preferably in a head difference + 0.7~ + 1.3mH ₂ O of about atmospheric pressure.

Although not shown, the storage space 30
A pressure sensor such as a diffusion type semiconductor pressure sensor is used as a pressure detecting means for detecting the pressure of the housing space 3
The pressure reducing / pressurizing device 7 is provided inside 0 or at a place communicating with this, and based on the pressure information obtained by this pressure detecting means.
The operation may be controlled. For example,
When the inside of the storage space 30 is decompressed or pressurized, based on the information obtained by the pressure detection means, the storage space 30
Each pump 71, so that the pressure of does not exceed a preset limit (lower limit value when depressurizing or upper limit value when pressurizing).
The operation of 72 and each solenoid valve 75, 76 can be controlled.

In addition to the pressure sensor, a temperature sensor for detecting the temperature of the dialysate in the bag and a weight sensor for detecting the weight of the bag (neither shown) are installed in the storage space 30. Good.

As shown in FIG. 2, the sealing means 5 is composed of a first sealing member 51 installed on the container body 3 side and a second sealing member 52 installed on the lid 4 side.
The first seal member 51 is adhesively fixed to the inner surface of the groove 31 of the container body 3, while the second seal member 52 is embedded and fixed at a position corresponding to the first seal member 51 inside the lid body 4. ing. The first seal member 51 and the second seal member 52 are each formed in an annular shape so as to surround the periphery of the upper opening of the container body 3. At the tip of the first seal member 51, a mountain-shaped protrusion 511 is formed which is deformed by contacting the second seal member 52 when the lid 4 is closed.

The constituent materials of the first seal member 51 and the second seal member 52 are, for example, natural rubber, isoprene rubber, butadiene rubber, styrene-butadiene rubber,
Various rubber materials such as chloroprene rubber, nitrile rubber, butyl rubber, acrylic rubber, silicone rubber, fluororubber, urethane rubber, various elastomers such as polyurethane, polyester, polyamide, olefin and styrene, or a mixture thereof. , And elastic materials such as laminates.

In this case, in order to improve the airtightness,
The constituent material of the second seal member 52 is the first seal member 51.
It is preferable that the material has higher flexibility (lower rubber hardness) than the constituent material. In this case, the flexibility may be adjusted by appropriately selecting the compounding ratio of the plasticizer and the like. In the present embodiment, for example, low hardness silicone rubber can be used as the constituent material of the second seal member 52. The Vickers hardness Hv of this material is about 10 to 20 °.

Further, the first seal member 51 and the second seal member 52 have a deformation amount S of the protrusion 511 of the first seal member 52, that is, a state in which no external force acts on the protrusion 511 (shown by a chain line in FIG. 2). State), the lid 4 is closed and the protrusion 51
1 is pressed by the second seal member 52 and deformed (state shown by the solid line in FIG. 2), the moving distance of the tip of the protrusion 511 is preferably about 0.5 to 2 mm, and more preferably 0. It is designed to be about 8 to 1.2 mm.

FIG. 3 is a sectional view showing another structural example of the sealing means in the closed container of the present invention. The sealing means 5 shown in the figure is a first sealing member 53 that is adhesively fixed to the inner surface of the groove portion 31 of the container body 3 and a first sealing member 53 that is embedded and fixed at a position corresponding to the first sealing member 53 inside the lid 4. 2 seal member 54. These first seal members 5
The third seal member 54 and the second seal member 54 are each formed in an annular shape so as to surround the upper opening of the container body 3. The first seal member 53 and the second seal member 54 are made of the elastic material as described above.

The cross-sectional shape of the tip of the first seal member 53 is cap-shaped, and the pair of protrusions 5 are provided on both sides thereof.
31, 532 are formed. Further, the second seal member 54 is formed with a recess 541 into which the tip of the first seal member 53 is fitted. When the lid 4 is closed, the tip of the first seal member 53 is recessed in the second seal member 54.
1 and the projections 531 and 532 are in close contact with the inner surfaces (side surfaces) 542 of the recess 541 that face each other. This makes it possible to achieve excellent sealing function (airtightness) with a relatively small pressure.
Is obtained. Although the top portion 533 of the first seal member 53 and the bottom surface 543 of the recess 541 are separated from each other when the lid 4 is closed in the illustrated configuration, they may be in close contact with each other.

The lower end portion of the second seal member 54 (recess 541)
Around the opening), a tapered surface (or chamfer) 544 is formed as guide means for facilitating insertion of the tip portion of the first seal member 53.

FIG. 4 is a sectional view showing another structural example of the sealing means in the closed container of the present invention. The sealing means 5 shown in the figure is composed of a sealing member 55 adhered and fixed to the inner surface of the groove portion 31 of the container body 3. The seal member 55 is formed in an annular shape so as to surround the upper opening of the container body 3. The seal member 55 is made of the elastic material as described above.

A pair of protrusions 551 are formed on the upper portion of the seal member 55 so as to protrude outward from each other. When the lid body 4 is closed, both protrusions 551 come into close contact with the inner surface of the lid body 4 to obtain a good sealing function.

The portion of the lid body 4 that is in close contact with the seal member 55 may be formed as a separate member. Further, the surface roughness Ra of the portion of the lid body 4 that is in close contact with the seal member 55 has a value of 0.1 to 1
It is preferably about 0 μm.

When both the protrusions 551 are pressed against the inner surface of the lid 4 by closing the lid 4 from a state in which no external force is applied (the state shown by the one-dot chain line in FIG. 4), the tips of the both protrusions 551 are brought into contact with each other. Deform so as to be separated from each other (state shown by a solid line in FIG. 4). As a result, an excellent sealing function (airtightness) can be obtained with a relatively small pressure-bonding force.

FIG. 5 is a sectional view showing another structural example of the sealing means in the closed container of the present invention. The sealing means 5 shown in the figure comprises a sealing member 56 that is adhesively fixed to the inner surface of the groove 31 of the container body 3. The seal member 56 is formed in an annular shape so as to surround the upper opening of the container body 3. The seal member 56 is made of the elastic material as described above.

Incidentally, as in the above, the sealing member 5 of the lid 4 is
6 may be formed by a separate member, and the surface roughness Ra of this portion is preferably about the same as above.

The cross-sectional shape of the seal member 56 is wavy (bellows) as shown in the figure. As a result, in addition to the elasticity of the constituent material itself, the wavy portion of the sealing member 56 expands and contracts, so that when the lid 4 is closed, it has an excellent sealing function (airtightness) with a relatively small pressure. can get.

FIG. 6 is a sectional view showing another structural example of the sealing means in the closed container of the present invention. The sealing means 5 shown in the figure comprises a sealing member 57 that is adhesively fixed to the inner surface of the groove 31 of the container body 3. The sealing member 57 is formed in an annular shape so as to surround the upper opening of the container body 3. The seal member 57 is made of the elastic material as described above.

As with the above, the seal member 5 of the lid 4 is
7 may be formed by a separate member, and the surface roughness Ra of this portion is preferably about the same as above.

The seal member 57 has a hollow structure. In this case, the hollow portion 571 is formed on the lid member 4 side (tip side) of the seal member 57. In addition, the seal member 5
At the tip of the lid 7, a mountain-shaped protrusion 572 is formed which is deformed by contact with the inner surface of the lid 4 when the lid 4 is closed. A gas such as air is enclosed in the hollow portion 571. In this case, the pressure in the hollow portion 571 may be about atmospheric pressure or a pressure higher than atmospheric pressure (positive pressure). By forming the seal member 57 with such a hollow structure, the flexibility of the seal member 57 is increased, and an excellent sealing function (airtightness) can be obtained with a relatively small pressure bonding force.

The cross-sectional shape of the hollow portion 571 when no external force acts thereon may be any shape such as a circle, an ellipse, a triangle, a rectangle, and a pentagon, and the seal member 57 has a plurality of hollow portions. May be.

FIG. 7 is a sectional side view showing another embodiment of the hermetically sealed container of the present invention, and FIG. 8 is an enlarged sectional view showing the joint between the container body and the lid of the hermetically sealed container shown in FIG. is there. The closed container 1'shown in these figures is the same as the closed container 1 except that the structure of the sealing means is different.

The sealing means in this closed container 1'is
The container main body 3 includes a seal member 58 that is adhesively fixed to the inner surface of the groove 31 and a seal driving unit 8 that can supply air (working fluid) to the hollow portion 581 of the seal member 58.

The seal member 58 is formed in an annular shape so as to surround the upper opening of the container body 3. The seal member 58 is made of the elastic material as described above. At the tip of the seal member 58, the lid 4 is closed and the seal member 5
A pair of protrusions 582 are formed that come into contact with the inner surface of the lid body 4 when the lid 8 is expanded. Around the protrusion 582, a thin portion 583 is formed.

The seal driving means 8 comprises a pressurizing pump 81,
An air supply pipe 82 whose base end is connected to the pressurizing pump 81, and a T-shaped branch connector 85 installed at the tip of the air supply pipe 82.
And an air supply pipe 83 whose lower end is connected to the branch connector 85
And an air supply pipe 84 whose upper end is connected to the branch connector 85
And solenoid valves 86 and 87 respectively installed in the air supply pipes 83 and 84. The upper end of the air supply pipe 83 penetrates the wall portion of the groove portion 31 and the seal member 58 and communicates with the hollow portion 581.

Next, the operation of the seal driving means 8 will be described. When the lid 4 is closed and the locking means 6 is locked, the electromagnetic valve 86 is opened, the electromagnetic valve 87 is closed, and the pressurizing pump 81 is actuated, whereby the outside air causes the air supply pipe 82, the branch connector 85, and the air supply pipe 83 to operate. It is injected into the hollow portion 581 of the seal member 58 via the hollow member 581 and the hollow portion 581 is pressurized. When the hollow portion 581 reaches a predetermined pressure (positive pressure), the solenoid valve 86
And the operation of the pressurizing pump 81 is stopped.
As a result, the seal member 58, which has been in the contracted state (the state indicated by the alternate long and short dash line in FIG. 8) until then, expands (the state indicated by the solid line in FIG. 8), the thin portion 583 extends, and the protrusion 582 extends into the lid 4. It adheres to the inner surface of and obtains a sealing function. In this state, the depressurizing / pressurizing device 7 is operated as described above to bring the storage space 30 of the container body 3 into a depressurized state or a pressurized state.

When the solenoid valves 86 and 87 are opened, the hollow portion 5 is opened.
The air in 81 is discharged through the air supply pipe 83, the branch connector 85, and the air supply pipe 84, and the hollow portion 581 returns to atmospheric pressure. As a result, the seal member 58 contracts, the thin portion 583 bends, and the protrusion 582 separates from the inner surface of the lid 4 (a state indicated by a chain line in FIG. 8).

According to the seal member 58 and the seal driving means 8 as described above, since the seal member 58 contracts when the cover 4 is opened and closed, the cover 4 does not receive a reaction force from the seal member 58. Can be opened and closed, and when the container main body 3 is sealed, the sealing member 58 expands due to the injection of air into the hollow portion 581, and the protrusion 582 adheres to the inner surface of the lid 4 to provide an excellent sealing function (airtightness). Sex).

The pressure of the hollow portion 581 when the sealing member 58 is in a sealed state is, for example, about 0.3 to 2.0 kgf / cm ^{2 in} gauge pressure. This pressure can be appropriately set according to the pressure when the storage space 30 of the container body 3 is depressurized or pressurized, the required level of airtightness, and the like.

In each of the above embodiments, the seal members 51 and 52, the seal members 53 and 54, and the seal member 55.
It is also possible to apply grease such as silicon grease in the vicinity of the contact portion between ~ 58 and the lid 4. As a result, deterioration of the seal member is prevented and the airtightness of the closed container is further improved. The closed container of the present invention has been described above based on the illustrated embodiments, but the present invention is not limited to these.

[0055]

As described above, according to the hermetically sealed container of the present invention, the airtightness is excellent, and in particular, the pressurization of the storage space of the container,
It exhibits excellent airtightness against both pressure reduction.

To obtain such excellent airtightness,
Since it is not necessary to apply a large pressure bonding force to the lid body, it is excellent in operability, and high-precision smoothing treatment is not required, so that the manufacturing cost is low.

[Brief description of drawings]

FIG. 1 is a sectional side view showing an embodiment of a closed container according to the present invention.

FIG. 2 is an enlarged cross-sectional view showing a joint between a container body and a lid in the closed container shown in FIG.

FIG. 3 is a cross-sectional view showing another configuration example of the sealing means in the closed container of the present invention.

FIG. 4 is a cross-sectional view showing another configuration example of the sealing means in the closed container of the present invention.

FIG. 5 is a cross-sectional view showing another configuration example of the sealing means in the closed container of the present invention.

FIG. 6 is a cross-sectional view showing another configuration example of the sealing means in the closed container of the present invention.

FIG. 7 is a sectional side view showing another embodiment of the closed container of the present invention.

8 is an enlarged cross-sectional view showing a joint between a container body and a lid in the closed container shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Airtight container 2 Casing 21 Screw 22 Bearing member 23 Screw 3 Container body 30 Storage space 31 Groove part 4 Lid body 41 Shaft 42 Supporting member 43 Screw 5 Sealing means 50 Joint part 51 1st sealing member 511 Projection 52 2nd sealing member 53 First seal member 531, 532 Projection portion 533 Top portion 54 Second seal member 541 Recessed portion 542 Inner surface 543 Bottom surface 544 Tapered surface 55 Seal member 551 Projection portion 56 Seal member 57 Seal member 571 Hollow portion 572 Protrusion portion 58 Seal member 581 Hollow portion 582 Protruding portion 583 Thin portion 6 Locking means 61 Pin 62 Hook 63 Shaft 7 Pressure reducing / pressurizing device 71 Pressure reducing pump 72 Pressure pump 73, 74 Air pipe 75, 76 Solenoid valve 8 Seal drive means 81 Pressure pump 82-84 Air pipe 85 Branch connector 86, 87 Solenoid valve

Claims (6)

[Claims] 1. A closed container having a container body having a storage space inside, a lid body that can be opened and closed with respect to the container body, and a sealing means installed at a joint portion between the container body and the lid body. Wherein the sealing means is a first seal member installed on one of the container body and the lid body, and a first seal member installed on the other of the container body and the lid body. A sealed container having a second seal member in contact with the second seal member, wherein the constituent material of the second seal member is more flexible than the constituent material of the first seal member. 2. A closed container having a container body having a storage space inside, a lid body that can be opened and closed with respect to the container body, and a sealing means installed at a joint portion between the container body and the lid body. Wherein the sealing means is a first seal member made of an elastic material, which is installed on one of the container body and the lid, and the other of the container body and the lid, 1 a second seal member having a recess into which the tip end portion of the seal member fits, wherein the first seal member has a pair of protrusions respectively contacting inner surfaces of the recess facing each other. Characteristic closed container. 3. A hermetically sealed container having a container body having a storage space inside, a lid body that can be opened and closed with respect to the container body, and sealing means installed at a joint portion between the container body and the lid body. Wherein the sealing means has a sealing member made of an elastic material installed on one of the container body and the lid, and the sealing member is provided on the other of the container body and the lid. A hermetically-sealed container, characterized in that it has a pair of projecting portions on its contact side that are deformed so that their tips are separated from each other during sealing. 4. A closed container having a container body having a storage space inside, a lid body that can be opened and closed with respect to the container body, and a sealing means installed at a joint portion between the container body and the lid body. The sealing means has a sealing member made of an elastic material and provided on one of the container body and the lid, and the sealing member has a wavy cross section. A closed container characterized by the above. 5. A hermetically sealed container having a container body having a storage space inside, a lid body that can be opened and closed with respect to the container body, and sealing means installed at a joint portion between the container body and the lid body. And wherein the sealing means has a sealing member made of an elastic material installed on one of the container body and the lid, and the sealing member is at least the other of the container body and the lid. A closed container having a hollow structure on the side in contact with. 6. A container main body having a storage space inside, a lid body that can be opened and closed with respect to the container body, and a hollow structure seal made of an elastic material installed at a joint portion between the container body and the lid body. A member and a seal drive means capable of supplying a working fluid to the hollow portion of the seal member, the working fluid is supplied to the hollow portion of the seal member to expand the seal member, A hermetically sealed container characterized by sealing a joint.