Sealed container

Abstract

The problem to be solved by the present invention is to provide a sealed container which can adjust the pressure applied to the sealing component between the sealed container body and the lid according to the pressure in the container. In order to solve the above problem, a sealed container (1) is provided, which comprises: a container body (2) with a bottom and a cylindrical shape, which is open at the top; a lid (3) having a cylindrical portion (6) and can close the upper opening of the container body (2) in an openable and closable manner, and the cylindrical portion is embedded in the end of the upper opening side of the container body (2); and an annular sealing component (4) is arranged on the cylindrical portion (6) to hermetically close the gap between the cylindrical portion (6) and the container body (2). The contact surface (5) of the container body (2) is a conical surface, which contacts the sealing component (4).

Description

Technical Field

[0001] The invention relates to a sealed container. Background Art

[0002] Patent Document 1 below discloses a vacuum container for storing samples, which prevents oxidation of samples used in electron microscopes, etc. When the vacuum container is closed with a lid, an O-ring is pressed against the container from above by the lid. As a result, the O-ring is squeezed and elastically deformed, thereby closing the gap between the container and the lid.

[0003] In the case of the vacuum container disclosed in Patent Document 1, since the O-ring is squeezed from above, excessive pressure is applied to the O-ring. In this state, if the pressure in the vacuum container changes, the O-ring remains in the position where the pressure is applied, and elastic deformation occurs. In this way, the vacuum container disclosed in Patent Document 1 is sealed by the O-ring when the internal pressure changes. Therefore, in the vacuum container disclosed in Patent Document 1, even if the internal pressure changes, excessive pressure is still applied to the O-ring. Therefore, it is desired not to apply excessive pressure to the O-ring when the pressure in the vacuum container changes.

[0004] In addition, as described above, in a container whose opening is sealed by an O-ring, a structure is known in which a lid is screwed into a hollow container body and fixed. In this case, a thread is formed on the outer peripheral surface of the container body, and a threaded hole is formed on the inner peripheral surface of the short cylindrical lid. Therefore, the lid can be screwed into the container body and installed. In the case of this structure, the lid is screwed to the bottom, whereby the O-ring is pressed from above on the container body by the lid, thereby the O-ring is squeezed and elastically deformed, thereby closing the gap between the container body and the lid.

[0005] In the case of such a structure, if the lid is loosely screwed, the O-ring cannot be pressurized as required, resulting in an unsealed state. In this state, even if the vacuum container is decompressed, the vacuum container cannot be properly decompressed because it is not sealed.

[0006] [Prior Technical Literature]

[0007] (Patent Document)

[0008] Patent Document 1: Japanese Utility Model Application Laid-Open No. 5-3977 Summary of the invention

[0009] [Problems to be solved by the invention]

[0010] An object of the present invention is to provide a sealed container capable of adjusting the pressurization applied to a sealing member between a sealed container body and a lid according to the pressure in the container.

[0011] [Technical means to solve the problem]

[0012] (1) The present invention comprises: a bottomed cylindrical container body, which is open at the top; a lid, which has a cylindrical portion and can be opened and closed to close the upper opening of the container body, the cylindrical portion being inserted into the end of the upper opening side of the container body; and an annular sealing member, which is provided on the cylindrical portion and hermetically seals the gap between the cylindrical portion and the container body. The contact surface of the container body is a tapered surface, and the contact surface contacts the sealing member.

[0013] (2) In the present invention, in the above (1), optionally, the opposing surface of the cylindrical portion facing the contact surface is a tapered surface inclined in a direction opposite to the inclination direction of the contact surface.

[0014] (3) In the present invention, optionally, in the above (1) or (2), the sealing member is a member that does not elastically deform.

[0015] (Effects of the Invention)

[0016] According to the present invention, it is possible to provide a sealed container capable of adjusting the pressurization applied to the sealing member between the sealed container body and the lid according to the pressure in the container. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a longitudinal sectional view showing a sealed container according to one embodiment of the present invention.

[0018] Figure 2A It is shown Figure 1 A longitudinal sectional view of the main parts of a sealed container.

[0019] Figure 2B It is shown Figure 1 A longitudinal sectional view of the main parts of a sealed container.

[0020] Figure 2C It is shown Figure 1 A longitudinal sectional view of the main parts of a sealed container.

[0021] Figure 2D It is shown Figure 1 A longitudinal sectional view of the main parts of a sealed container.

[0022] Figure 3 It is a longitudinal section showing a modification of the sealed container of the present invention. DETAILED DESCRIPTION

[0023] Hereinafter, specific embodiments of the present invention will be described in detail with reference to the drawings.

[0024] Figure 1The sealed container 1 of this embodiment comprises: a bottomed cylindrical container body 2, which is open at the top; a lid 3, which can open and close the upper opening of the container body 2; and an annular sealing member 4, which seals the gap between the container body 2 and the lid 3.

[0025] The container body 2 is a member constituting the bottom wall and the peripheral side wall of the sealed container 1. The container body 2 is a bottomed cylindrical shape that is open only at the top. In the container body 2, the contact surface 5 is a tapered surface, and the contact surface 5 contacts the sealing member 4 described later. In the present embodiment, the inner peripheral surface of the end portion of the upper opening side of the container body 2 is the contact surface 5. The contact surface 5 is a tapered shape whose diameter increases as it goes upward.

[0026] The cover 3 is a short cylindrical shape that opens at the bottom. The cover 3 has a barrel 6 that is embedded in the end of the upper opening side of the container body 2. The barrel 6 is cylindrical in shape with its axial direction in the up-down direction, and is formed integrally with the lower surface of the center portion of the cover 3 and extends downward. The outer diameter of the barrel 6 is smaller than the inner diameter of the peripheral wall of the cover 3. Therefore, a cylindrical gap 7 is formed between the outer peripheral surface of the barrel 6 and the inner peripheral surface of the peripheral wall of the cover 3. A groove 8 that opens radially outward is formed on the outer peripheral surface of the barrel 6 along the circumferential direction.

[0027] The lid 3 is mounted on the container body 2 in a manner to close the upper opening of the container body 2. Specifically, the upper end of the peripheral side wall of the container body 2 is inserted into the cylindrical gap 7 until the lower surface of the lid 3 abuts against the upper end surface of the peripheral side wall of the container body 2. In this state, the cylindrical portion 6 of the lid 3 is inserted into the upper opening of the container body 2.

[0028] When the cylinder portion 6 of the cap 3 is inserted into the container body 2, since the contact surface 5 of the container body 2 is a tapered surface, the distance between the contact surface 5 of the container body 2 and the bottom surface of the groove 8 formed on the cylinder portion 6 is different at the upper and lower positions. In the present embodiment, since the contact surface 5 is a tapered shape whose diameter increases upward, the distance between the contact surface 5 of the container body 2 and the bottom surface of the groove 8 decreases downward.

[0029] The sealing member 4 is an O-ring having a circular longitudinal section and is an elastically deformable member. The sealing member 4 is arranged on the barrel 6 of the cover 3. In the example of the accompanying drawings, the sealing member 4 is assembled on the groove 8 of the barrel 6 of the cover 3. In the state where the sealing member 4 is assembled in the groove 8, if the upper opening of the container body 2 is closed by the cover 3 as described above, the gap between the barrel 6 and the container body 2 is airtightly closed by the sealing member 4. In the example of the accompanying drawings, since the barrel 6 is inserted into the upper opening of the container body 2, the sealing member 4 closes the gap between the outer peripheral surface of the barrel 6 and the inner peripheral surface of the peripheral side wall of the container body 2. In the state where the gap between the barrel 6 and the container body 2 is closed by the sealing member 4, the sealing member 4 contacts the contact surface 5 of the container body 2 and contacts the bottom surface of the groove 8 of the barrel 6. In addition, the diameter of the longitudinal section of the sealing member 4 is smaller than the width of the groove 8.

[0030] The gap between the barrel 6 and the container body 2 is closed by the sealing member 4, whereby the inside of the container 1 is sealed. In the present embodiment, in this sealed state, the gas in the container 1 is sucked to the outside and discharged, and the inside of the container 1 is depressurized. The inside of the container 1 is depressurized by using a decompression device such as a vacuum pump not shown. The decompression device is connected to the sealed container 1 via an exhaust passage not shown. The exhaust passage is connected to a ball valve 10 provided on the lid 3. The ball valve 10 is a valve for opening and closing the exhaust passage. Therefore, the decompression device is operated while the ball valve 10 is opened, whereby the gas in the container 1 is sucked to the outside and discharged via the exhaust passage, and the inside of the container 1 can be depressurized. The pressure inside the container 1 is detected by a negative pressure gauge 11 provided on the lid 3.

[0031] Figure 2A , Figure 2B , Figure 2C ,and Figure 2D It is shown Figure 1 A longitudinal sectional view of the main part of the sealed container. Specifically, Figure 2A , Figure 2B , Figure 2C ,and Figure 2D It is a schematic enlarged longitudinal sectional view showing the sealed portion of the container body 2 and the lid 3 . Figure 2A , Figure 2B , Figure 2C ,and Figure 2D The pressure in container 1 varies. Figure 2A , Figure 2B , Figure 2C ,and Figure 2D The order of decreasing.

[0032] like Figure 2A , Figure 2B , Figure 2C ,and Figure 2DAs shown, the pressure in the container 1 is reduced, whereby the sealing member 4 moves downward. Therefore, if the pressure in the container 1 is different, the upper and lower positions of the sealing member 4 are different. That is, the contact position between the sealing member 4 and the contact surface 5 is different up and down. At this time, as described above, since the distance between the contact surface 5 of the container body 2 and the bottom surface of the groove 8 is different, the pressure applied to the sealing member 4 is different. In this way, according to the sealed container 1 of this embodiment, when the pressure in the container 1 changes, the pressure applied to the sealing member 4 can be adjusted. Thus, if the pressure in the container 1 is formed to a certain constant pressure and left for a long time, the pressure in the container 1 is released, etc., so that the pressure in the container 1 changes, but the sealing member 4 moves according to the change, whereby the pressure applied to the sealing member 4 can be adjusted. In addition, the inclination angle of the contact surface 5 is formed in advance so that the sealing member 4 is pressurized according to the pressure in the container 1. Therefore, according to the decompression state in the container 1, the most appropriate pressurization can be applied to the sealing member 4.

[0033] In addition, in the case of the sealed container 1 of the present embodiment, unlike the existing structure of screwing the lid into the container body, a threaded structure is not required. Therefore, according to the sealed container 1 of the present embodiment, it is possible to be miniaturized accordingly according to the amount of the threaded structure. Furthermore, in the case of the sealed container 1 of the present embodiment, since the contact surface 5 of the container body 2 is a tapered surface, when the lid 3 is mounted on the container body 2, the distortion of the closure member 4 caused by the contact between the closure member 4 and the contact surface 5 can be suppressed compared to the case where the contact surface is vertical. Moreover, in the case of the present embodiment, even if some distortion occurs, the distortion can be eliminated because the closure member 4 is moved by decompressing the inside of the container 1.

[0034] Figure 3 1 is a longitudinal section showing a modified example of the sealed container of the present invention. In this figure, only the closed part of the container body 2 and the lid 3 is shown. In addition, in this modified example, the characteristic part is described, and the matters described in the above embodiment are omitted.

[0035] In the sealed container 1a of this modified example, the facing surface of the barrel 6 that is opposite to the contact surface 5 is a tapered surface. In this modified example, the bottom surface of the groove 8 is the facing surface. The facing surface 9 is a tapered surface that is inclined in the direction opposite to the inclination direction of the contact surface 5 of the container body 2. In this modified example, the facing surface 9 of the barrel 6 is a tapered shape whose diameter decreases as it goes upward.

[0036] In the case of this modified example, the lid 3 is mounted on the container body 2, whereby the gap between the container body 2 and the barrel 6 is closed by the sealing member 4. At this time, the outer peripheral surface of the sealing member 4 contacts the contact surface 5 of the container body 2, and at the same time, the gap between the inner peripheral surface of the container body 2 and the outer peripheral surface of the barrel 6 is closed by the sealing member 4 in a state where the inner peripheral surface of the sealing member 4 contacts the facing surface 9 of the barrel 6.

[0037] In addition, the present invention is not limited to the above-mentioned embodiment (including modified examples), and modifications and improvements within the scope that can achieve the object of the present invention are included in the present invention.

[0038] For example, in the above embodiment, the contact surface 5 of the container body 2 forms a tapered surface whose diameter increases as it goes upward, but it can also be formed inversely to form a tapered surface whose diameter decreases as it goes upward. In this case, in contrast to the above modification, the facing surface 9 of the barrel 6 forms a tapered surface whose diameter increases as it goes upward. In this structure, the sealed container is used in a space that has been depressurized.

[0039] In addition, in the above-mentioned embodiment, the sealing member 4 is formed into an O-ring capable of elastic deformation, but it can also be a member that does not elastically deform. For example, the sealing member can also be a metal material that does not elastically deform. In this case, the sealing member is more likely to move according to the pressure in the container.

[0040] In addition, in the above-mentioned modification, the longitudinal section of the facing surface 9 of the cylinder portion 6 forms a linear tapered shape, but may also form a curved tapered shape.

[0041] Reference numerals

[0042] 1, la: sealed container

[0043] 2: Container body

[0044] 3: Lid

[0045] 4: Enclosed parts

[0046] 5: Contact surface

[0047] 6: Cylinder

[0048] 9: Opposite face

Claims

1. A sealed container, wherein the interior of the sealed container is decompressed. Its characteristics are: have: The container body is a bottomed cylindrical container body, which is open at the top; A lid having a cylindrical portion and closing the upper opening of the container body in an openable and closable manner, wherein the cylindrical portion is fitted into an end portion of the upper opening side of the container body; An annular sealing member is provided on the aforementioned cylindrical portion to hermetically seal the gap between the aforementioned cylindrical portion and the aforementioned container body; The contact surface of the container body is a tapered surface, which contacts the closure member. The inclination angle of the contact surface is formed so as to apply a pressure corresponding to the pressure in the sealed container to the sealing member. A groove opening radially outward is formed on the outer peripheral surface of the cylinder along the circumferential direction. The sealing member is mounted in the groove, and the sealing member is movable in the groove so that the contact position between the sealing member and the contact surface is different in the upper and lower parts.

2. The sealed container according to claim 1, Its characteristics are: The facing surface of the cylindrical portion facing the contact surface is a tapered surface inclined in a direction opposite to the inclination direction of the contact surface.

3. The sealed container according to claim 1 or 2, Its characteristics are: The aforementioned closing member is a member that does not elastically deform.

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