JP6389624B2 - O-ring seal structure and pressurized container using the same - Google Patents

Description

  The present invention relates to an O-ring seal structure and a pressurized container using the same.

An O-ring having a circular cross section (O-shaped) is known as a sealing material for preventing outflow or inflow of fluid from a gap between two parts. This O-ring is mounted in an annular seal groove provided in one of the two parts, and is used by being compressed with the two parts.
Patent Document 1 discloses a pressurized container having a seal structure using such an O-ring. Specifically, a container main body having an opening, a valve holder for closing the opening, an O-ring attached to a seal groove of the valve holder, and a cover member for fixing the valve holder to the container main body are provided. A pressurized container is disclosed.

JP 2012-131553 A

However, the pressurized container as in Patent Document 1 cannot be manufactured as designed in the production stage, and there is a problem that the seal becomes insufficient and the propellant leaks. For example, when the container body is filled with propellant and the valve holder equipped with an O-ring is moved downward to seal the container body, the O-ring is twisted in the seal groove or the O-ring protrudes from the seal groove. In some cases, the O-ring cannot be sufficiently compressed. In addition, a resin thread or a resin piece remaining in the O-ring groove due to defective molding of the valve holder may be interposed between the O-ring and the seal groove to reduce the sealing effect. Furthermore, there is a problem that the seal structure is insufficient as described above, and the propellant may leak for a long period of time, which is difficult to find in a leak test after product production.
An object of the present invention is to provide a highly productive O-ring seal structure and a pressurized container using the same.

The O-ring seal structure of the present invention includes a cylindrical body having a cylindrical inner peripheral wall, a plug inserted into the cylindrical body and having a cylindrical outer peripheral wall, and either the inner peripheral wall or the outer peripheral wall. A seal structure comprising an O-ring which is held in the formed annular seal groove and seals between the inner peripheral wall and the outer peripheral wall, and the bottom surface of the seal groove has a plurality of seals between the O-ring and the O-ring. It is characterized by being configured to form points.
The seal structure of the present invention may be one having a plurality of step portions serving as seal points on the bottom surface of the seal groove. In particular, it is preferable that the bottom of the seal groove is provided with convex portions on the top and bottom, leaving the center.
In the seal structure of the present invention, one of the cylinders or plugs in which the seal grooves are formed is preferably made of a synthetic resin. The other plug or cylinder may be made of synthetic resin.
The pressurized container for filling the contents having the internal pressure according to the present invention includes a container main body, the cylindrical body that is an opening of the container body, the plug body having a valve mechanism, the plug body, and the valve mechanism. A cover cap fixed to the container main body and the O-ring seal structure of the present invention are provided.

The O-ring seal structure of the present invention includes a cylindrical body having a cylindrical inner peripheral wall, a plug inserted into the cylindrical body and having a cylindrical outer peripheral wall, and either the inner peripheral wall or the outer peripheral wall. A seal structure comprising an O-ring which is held in the formed annular seal groove and seals between the inner peripheral wall and the outer peripheral wall, and the bottom surface of the seal groove has a plurality of seals between the O-ring and the O-ring. Since it is configured to form points, even if dust such as burrs or dust during molding of the plug sticks to the seal groove or O-ring, or even enters between them, high sealing performance is achieved. Maintained.
In the seal structure according to the present invention, when the bottom surface of the seal groove has a plurality of step portions serving as seal points, the seal structure can be easily adjusted and the productivity is high. In addition, since it has a step, when the O-ring is compressed, the O-ring can escape to a deep part along the step, and the O-ring does not protrude beyond the design from the seal groove. When the seal structure is configured by sliding the body and the plug body, the O-ring is not easily twisted and the O-ring does not shift. In particular, when convex portions are provided on the top and bottom of the bottom surface of the seal groove, the opposing stepped portions serve as seal points, so that stable sealing performance can be ensured. And when the O-ring is compressed, the O-ring can escape to the center, so that the O-ring can be stably accommodated, and when the sealing structure is formed by sliding the cylinder and the plug, It is more difficult to twist and the O-ring is not further displaced.
In the sealing structure of the present invention, when one of the cylinders or plugs in which the sealing groove is formed is made of synthetic resin, burrs and the like are generated by molding the synthetic resin, but they cannot be removed. However, a stable seal can be obtained. When the other plug or cylinder is made of a synthetic resin, a stable seal structure with high productivity can be obtained.
The pressurized container for filling the contents having the internal pressure according to the present invention includes a container main body, the cylindrical body that is an opening of the container body, the plug body having a valve mechanism, the plug body, and the valve mechanism. Since the cover cap fixed to the container body and the O-ring seal structure of the present invention are provided, the pressure vessel is stable and has a high productivity.

1a and 1b are respectively a side sectional view showing an embodiment of a pressurized container of the present invention and an enlarged view of the X1 part. 2a, 2b, and 2c are plan views, Z1-Z1 cross-sectional views, and Z2-Z2 cross-sectional views showing the valve holder of the pressurized container of FIG. 1 (with an aerosol valve accommodated in one side), and FIG. It is sectional drawing which shows the sealing groove | channel of the pressurized container of FIG. 3a and 3b are side cross-sectional views showing another embodiment of the pressurized container of the present invention, an enlarged view of the X2 portion thereof, and FIG. 3c is a cross-sectional view showing the seal groove. It is side surface sectional drawing which shows other embodiment of the pressurized container of this invention. 5a and 5b are side cross-sectional views showing still another embodiment of the pressurized container of the present invention, and an enlarged view of the X3 portion.

The aerosol container 10 of FIG. 1a has the sealing structure of the present invention.
The aerosol container 10 includes a synthetic resin container body 11, a valve holder 12 inserted into the opening thereof, two aerosol valves 13 accommodated in the valve holder 12, the valve holder 12 and the aerosol valve 13. And a cover cap 14 fixed to the container body. A pouch 15 that is inserted into the container body 11 is provided at the lower end of the aerosol valve 13.
As shown in FIG. 1 b, an O-ring 17 is attached to an annular seal groove 16 formed on the outer peripheral wall of the valve holder 12. Two convex portions 18b projecting radially outward are formed on the bottom portion 18 of the seal groove 16 in a vertically symmetrical manner, and are provided with two step portions 20 on the top and bottom. Since it is configured in this manner, the O-ring 17 forms a seal structure with the two step portions 20 of the bottom portion 18 of the seal groove 16 as seal points.

  The container body 11 is a pressure resistant container made of a synthetic resin such as polyethylene terephthalate having a thick part 11a at the top, a cylindrical body, a tapered shoulder, a cylindrical neck, and an upper end. The inner surface of the neck and the inner surface of the jaw are continuous and have a cylindrical shape consisting of a vertical surface, and constitute the inner surface 11b of the opening. In addition, an annular vertical groove 11c extending so as not to affect the seal structure is provided on the inner surface of the jaw portion 11a in the middle of the lower part from the upper end. Moreover, you may use the pressure | voltage resistant container coat | covered with the synthetic resin film | membrane on the surface of the glass container which uses soda glass, borosilicate glass, etc. as the container main body 11. FIG.

2A to 2C, the valve holder 12 includes a cylindrical plug portion 21 inserted into the opening of the container body 11, a substantially cylindrical lid portion 22 provided at the upper end thereof, and a plug portion 21. Or it has the flange part 23 which protrudes outward from the cover part 22. As shown in FIG. In addition, the valve holder 12 is formed with a cylindrical valve holding portion 24 that penetrates through the top and bottom (the plug portion and the lid portion). The valve holding portion 24 is a part that houses the aerosol valve 13 and includes a cylindrical inner surface 24 a that receives the O-ring 31 of the aerosol valve 13. The flange portion 23 is disposed on the upper surface of the jaw portion 11 a of the container body 11. That is, the lid portion 22 is disposed so as to protrude upward from the opening of the container body 11.
In addition, as shown in FIG. 2 a, the lid portion 22 has a circular shape with a part cut away by a line parallel to a line connecting the stems of two aerosol valves. That is, it is a pillar body composed of the curved side surface 22a and the flat side surface 22b.
Further, the cover portion 22 is formed with a groove 22c for reducing the weight and discharging the fluid that has entered the inside.

  An annular seal groove 16 is formed on the outer peripheral wall 21 a of the plug portion 21. As shown in FIG. 2d, the bottom portion 18 of the seal groove 16 is composed of a central flat portion 18a and convex portions 18b projecting radially outward from both ends of the flat portion. That is, the annular step portion 20 is formed so as to face each other by the flat portion 18a and the convex portion 18b.

As shown in FIG. 2d, the depth D of the seal groove 16 (distance from the outer peripheral surface to the flat surface portion 18a) varies depending on the material of the O-ring 17, but is 55 to 80% of the diameter of the O-ring 17, in particular 60 to It is preferably 75%. For example, when an O-ring having a thickness of 2.0 mm is used, the thickness is preferably 1.1 to 1.6 mm, particularly preferably 1.2 to 1.5 mm.
On the other hand, the height H of the convex portion 18b varies depending on the material of the O-ring 17, but is preferably 0.5 to 20%, particularly 1 to 15% of the diameter of the O-ring 17. For example, when using an O-ring having a thickness of 2.0 mm, the thickness is preferably 0.01 to 0.4 mm, particularly 0.02 to 0.3 mm.
The rising angle A of the convex part 18b from the flat part 18a is preferably 10 to 90 degrees, particularly preferably 15 to 60 degrees.
Further, the width L1 of the flat portion 18a is preferably 40 to 70%, particularly 50 to 60% of the diameter of the O-ring 17. For example, when an O-ring having a thickness of 2.0 mm is used, the thickness is preferably 0.8 to 1.4 mm, particularly 1.0 to 1.2 mm.
The width L of the seal groove 16 is preferably 105 to 130%, particularly 110 to 125% of the diameter of the O-ring 17. For example, when an O-ring having a thickness of 2.0 mm is used, the thickness is preferably 2.1 to 2.6 mm, particularly 2.2 to 2.5 mm.

Due to such a configuration, when the O-ring 17 is compressed, the compression of the O-ring 17 by the corners of the step portion 20 of the bottom 18 of the seal groove 16 increases. That is, it becomes a seal point where the compression of the O-ring 17 changes greatly. And since it has two seal points, even if a resin thread or resin piece adheres to the seal groove 16 or O-ring 17 or is sandwiched between them, the seal by at least one seal point is maintained. As a result, high sealing performance is maintained. Further, since the flat portion 18a is provided, the compressed O-ring 17 can escape into the flat portion 18a. This prevents the O-ring 17 from protruding from the seal groove 16 or twisting of the O-ring 17 when the O-ring 17 is attached to the seal groove 16 and the inner surface 11b of the opening of the container body 11 is slid. it can.

As shown in FIG. 2b, the aerosol valve 13 includes a cylindrical housing 26 to which a pouch 15 is connected at the lower portion, a cylindrical stem 27 that is inserted into the housing 26 so as to be movable up and down, and a side surface of the stem. An annular stem rubber 28 that closes the stem hole formed in the cover, a spring 29 that constantly biases the stem 27 upward, a cover 30 that fixes the stem 27 and the stem rubber 28 to the housing 26, and a seal on the outer periphery of the housing 26 And an O-ring 31 provided in the groove 26a.
By connecting a connecting member 15b of the pouch 15 described later to the lower end of the housing 26 of the aerosol valve 13, the pouch 15 is sealed (see FIG. 1).
The seal groove 26 a of the aerosol valve 13 may be provided with the same structure as the seal groove 16 of the valve holder 12.
Further, as in the aerosol container 40 of FIG. 3, the housing 26 may be omitted, and the stem 27, the stem rubber 28, and the spring 29 may be directly accommodated in the cylindrical valve holding portion in the valve holder and closed with the cover cap 44. .
Returning to FIG. 2 b, the aerosol valve 13 is opened by pushing down (operating) the stem 27 downward with respect to the housing 26.

The cover cap 14 is formed at a cylindrical mount portion 33 that covers the container body 11, the valve holder 12, and the aerosol valve 13, and the lower end thereof, as shown by an imaginary line in FIG. 2c. It consists of the cylindrical adhering part 34 fixed to the container main body 11.
The mount portion 33 has two holes (not shown) through which the stem 27 of the aerosol valve 13 passes through the top surface 33a. Similar to the lid portion 22, the mount portion 33 has a shape in plan view that is a circle with a part cut away by a line parallel to the line connecting the stems of the two aerosol valves. Similarly, it is a cylinder composed of a curved side surface and a flat side surface (not shown). And this plane part is provided so that it may overlap with the flat side surface 22b of the valve holder 12. FIG. Since the cover cap 14 has such an outer shape, the orientation of the aerosol container 10 can be recognized when filling the contents or mounting the discharge member.

Returning to FIG. 1, the pouch 15 is attached to the bag body 15 a made of a sheet, a cylindrical connecting member 15 b welded or stuck to the opening thereof, and a lower end of the connecting member 15 b, and the contents in the pouch Is provided to the connecting member 15b.
In this embodiment, the pouch 15 is used, but a flexible inner bag made of a synthetic resin used for a double aerosol container may be used. In that case, a connecting member may be used, but it may be directly attached to the aerosol valve without being used.

The aerosol container 40 of FIG. 3a includes a metal container body 41, a valve holder 42 inserted into the opening thereof, a set of valve mechanisms 43 accommodated in the valve holder 42, the valve holder 42 and the valve A cover cap 44 for fixing the mechanism 43 to the container body 41 is provided. A dip tube 45 that sucks up the contents in the container main body 41 is provided at the lower end of the valve holder 42.
In the aerosol container 40, as shown in FIG. 3b, a convex portion 48b projecting radially outward is formed in the center at the bottom 48 of the seal groove 46 on the outer peripheral wall of the valve holder 42 to which the O-ring 17 is attached. The two step portions 50 are provided above and below the convex portion 48b. Because of this configuration, the O-ring 17 forms a seal structure with the two step portions 50 of the bottom 48 of the seal groove 46 as seal points.

The container body 41 is a pressure-resistant container having a bead portion 41a at the bottom, a cylindrical body, a tapered shoulder, a cylindrical neck, and an upper end. The neck and the bead 41a constitute an opening, and the inner diameter of the neck and the inner diameter of the bead are the same.
Such a container body 41 is formed into a bottomed cylindrical shape by impact processing and squeezing and ironing a metal disk such as aluminum, or formed into a bottomed cylindrical shape by squeezing and ironing a metal cup, and is synthesized on the inner surface. A resin coat is provided, and then necking is performed on the upper end of the body to form a shoulder and a neck, and curling is performed on the upper end of the neck to form a bead 41a.

  The valve holder 42 includes a cylindrical plug portion 51 that is inserted into the opening of the container body 41 and a flange portion 52 that protrudes outward from the upper end of the plug portion 51. The valve holder 42 is formed with a cylindrical valve holding portion 53 penetrating vertically. The valve holding portion 53 includes a bottom portion 53 a having a center hole, and is a portion that accommodates the valve mechanism 43. The flange portion 52 is disposed on the upper surface of the bead portion 41 a of the container main body 41.

  An annular seal groove 46 is formed in the outer peripheral wall 51a of the plug portion 51 as shown in FIG. 3b. As shown in FIG. 3b, the bottom portion 48 of the seal groove 46 is composed of a flat portion 48a disposed above and below and a convex portion 48b disposed so as to protrude radially outward between the flat portions. Yes. That is, the two step portions 50 are formed so as to face opposite sides. Returning to FIG. 3 a, a tubular tube connecting portion 51 b connected to the dip tube 45 is formed at the center of the lower end of the plug portion 51 so as to communicate with the valve holding portion 53.

As shown in FIG. 3 c, the depth D of the seal groove 46 (distance from the outer peripheral surface to the flat portion 48 a) varies depending on the material of the O-ring 17, but 50 to 80% of the diameter of the O-ring 17, especially 55 to 55%. It is preferably 75%. For example, when an O-ring having a thickness of 2.0 mm is used, the thickness is preferably 1.0 to 1.6 mm, particularly 1.1 to 1.5 mm.
On the other hand, the height H of the convex portion 48b varies depending on the material of the O-ring 17, but is preferably 0.5 to 20%, particularly 1 to 15% of the diameter of the O-ring 17. For example, when using an O-ring having a thickness of 2.0 mm, the thickness is preferably 0.01 to 0.4 mm, particularly 0.02 to 0.3 mm.
The rising angle B of the convex part 48b from the flat part 48a is preferably 10 to 90 degrees, particularly preferably 15 to 60 degrees.
The width L2 of the convex portion 48b is preferably 40 to 70%, particularly 50 to 60% of the diameter of the O-ring 17. For example, when an O-ring having a thickness of 2.0 mm is used, the thickness is preferably 0.8 to 1.4 mm, particularly 1.0 to 1.2 mm.
The width L of the seal groove 46 is preferably 105 to 130%, particularly 110 to 125% of the diameter of the O-ring 17. For example, when an O-ring having a thickness of 2.0 mm is used, the thickness is preferably 2.1 to 2.6 mm, particularly 2.2 to 2.5 mm.

  3B, when the O-ring 17 is compressed, the O-ring 17 is deformed in the seal groove 46 so as to cover the convex portion 48b, and the step portion 50 of the bottom portion 48 is formed. Compressed locally by the corners. That is, it becomes a seal point where the compression of the O-ring 17 changes greatly. And since it has two such sealing points like the aerosol container 10 of FIG. 1, a resin thread, a resin piece, etc. have adhered to the sealing groove | channel 16 or the O-ring 17, or between these. Even if it is pinched, the seal by at least one seal point is maintained, and as a result, high sealing performance is maintained. Similarly, since the flat portion 48a is provided, the compressed O-ring 17 can escape into the flat portion 48a, and the O-ring 17 protrudes from the seal groove 46 or the O-ring 17 is twisted. Can be prevented.

  Returning to FIG. 3 a, the valve mechanism 43 includes a stem 27, a stem rubber 28, and a spring 29 that are accommodated in the valve holding portion 53 of the valve holder 42. The stem 27, the stem rubber 28, and the spring 29 are substantially the same as the aerosol valve 13 in FIG. The stem 27 and the spring 29 are supported by the bottom 53 a of the valve holding portion 53, and the stem rubber 28 is supported by the upper end of the valve holding portion 53 and is closed by the cover cap 44.

  The cover cap 44 has a U-shaped cross section that covers the container body 41, the valve holder 42, and the valve mechanism 43, and fixes the valve holder 42 and the valve mechanism 43 to the container body 41. The cover cap 44 is fixed to the container body 41 by caulking the lower end toward the base of the bead part 41 a of the container body 41.

The aerosol container 60 of FIG. 4 includes a metal container body 61, a valve housing (valve holder) 62 inserted into the opening thereof, a set of valve mechanisms 43 accommodated in the valve housing 62, and a valve thereof. A cover cap 64 for fixing the housing 62 and the valve mechanism 43 to the container body 61 is provided. A dip tube 45 that sucks up the contents in the container body 61 is provided at the lower end of the valve housing 62. The valve housing 62 is functionally the same as the valve holder 42 of FIG. The valve housing 62 and the valve mechanism 43 constitute the aerosol valve 13 shown in FIG. The valve mechanism 43 and the dip tube 45 are substantially the same as the valve mechanism 43 and the dip tube 45 of FIG.
A seal groove 16 similar to that shown in FIG. 1 is formed on the outer peripheral wall of the valve housing 62 of the aerosol container 60. That is, the bottom portion 18 of the seal groove 16 has a flat portion 18a provided at the center and convex portions 18b provided at both ends thereof, and the step portion 20 is formed so as to sandwich the flat portion 18a. (See FIG. 1b). The O-ring 17 forms a seal structure with these two step portions 20 as seal points.

The container main body 61 is a metal pressure resistant container including a bottom portion, a cylindrical body portion, a tapered shoulder portion, and a cylindrical neck portion 61a, and an upper end of the neck portion 61a forms an opening. The neck 61a is formed with an annular recess 61b that supports the valve housing 62 and protrudes inward.
Such a container main body 61 is formed into a bottomed cylindrical shape by impact processing and squeezing and ironing a metal disc such as aluminum, or formed into a bottomed cylindrical shape by squeezing and squeezing a metal cup, and is synthesized on the inner surface. A resin coat is provided, and then necking is performed on the upper end of the body portion to form a shoulder portion and a neck portion, and a recess portion 61b is formed in the neck portion 61a.

The valve housing 62 includes a cylindrical plug portion 71 that is inserted into the opening of the container body 61, and a flange portion 72 that protrudes outward from the upper end of the plug portion 71. The valve housing 62 is formed with a cylindrical valve holding portion 73 penetrating vertically. The valve holding portion 73 includes a bottom portion 73 a having a center hole, and is a portion that accommodates the valve mechanism 43. The flange portion 72 is disposed at the upper end of the neck portion 61 a of the container main body 61.
An annular seal groove 16 is formed on the outer peripheral wall 71 a of the plug portion 71. The lower end of the outer peripheral wall 71 a is a stepped portion 71 b that decreases in diameter downward, and is supported by the recessed portion 61 b of the container body 61. At the center of the lower end of the stopper portion 71, a cylindrical tube connecting portion 71c that connects the dip tube 45 so as to communicate with the valve holding portion 73 is provided. As described above, the seal groove 16 is substantially the same as the seal groove 16 of FIG.

The cover cap 64 has a U-shaped cross section that covers the container body 61, the valve housing 62, and the valve mechanism 43, and fixes the valve housing 62 and the valve mechanism 43 to the container body 61. The cover cap 64 is fixed to the container body 61 by caulking the lower end toward the recess 61 b of the container body 61.

  Similarly to the aerosol container 10 of FIG. 1, the aerosol container 60 also has two seal points because the O-ring 17 that seals between the container main body 61 and the valve housing 62 is held by the seal groove 16. And productivity is high.

  Although the aerosol container of FIGS. 1-4 has provided the seal groove which hold | maintains an O-ring in the stopper part side of a valve holder, you may provide a seal groove in the container main body side like FIG. The aerosol container 80 of FIGS. 5 a and b is the aerosol container of FIG. 1, and the seal groove 16 is provided on the inner surface 11 b of the opening of the container body 11. And the outer peripheral wall 21a of the plug part 21 of the valve holder 12 is cylindrical. The other structure is substantially the same as the aerosol container 10 of FIG.

  Although the seal structure of this invention was demonstrated using the aerosol container of FIGS. 1-5, the use is not specifically limited. In particular, it is preferably used for a synthetic resin stopper or container body in which burrs and the like are formed by manufacturing. Moreover, it can use other than what has internal pressure like an aerosol container. Moreover, it can be used not only for sealing containers but also for structures that seal two spaces.

DESCRIPTION OF SYMBOLS 10 Aerosol container 11 Container body 11a Jaw part 11b Opening inner surface 11c Vertical groove 12 Valve holder 13 Aerosol valve 14 Cover cap 15 Pouch 15a Bag body 15b Connecting member 15c Lead member 16 Valve holder seal groove 17 O-ring 18 Seal groove Bottom portion 18a Flat portion 18b Protruding portion 20 Step portion 21 Plug portion 21a Outer peripheral wall 22 Lid portion 22a Curved side surface 22b Flat side surface 22c Groove 23 Flange portion 24 Valve holding portion 24a Cylindrical inner surface 26 Housing 26a Housing seal groove 27 Stem 28 Stem Rubber 29 Spring 30 Cover 31 O-ring 33 Mount part 33a Top surface 34 Adhering part 40 Aerosol container 41 Container body 41a Bead part 42 Valve holder 43 Valve mechanism 44 Cover cap 45 Dip Valve 46 Seal groove of valve holder 48 Bottom part of seal groove 48a Flat part 48b Projection part 50 Step part 51 Plug part 51a Outer wall 51b Tube connection part 52 Flange part 53 Valve holding part 53a Bottom part of valve holding part 60 Aerosol container 61 Container Main body 61a Neck portion 61b Recessed portion 62 Valve housing 64 Cover cap 71 Plug portion 71a Outer peripheral wall 71b Stepped portion 71c Tube connecting portion 72 Flange portion 73 Valve holding portion 73a Bottom portion 80 Aerosol container

Claims (5)

A cylinder having a cylindrical inner peripheral wall;
A plug inserted into the cylinder and having a cylindrical outer peripheral wall;
A seal structure comprising an O-ring which is held in an annular seal groove formed on either the inner peripheral wall or the outer peripheral wall and seals between the inner peripheral wall and the outer peripheral wall;
The bottom surface of the seal groove is provided with convex portions on both sides leaving the center, and has a central plane portion and a plurality of step portions that serve as seal points,
It is the formed plurality of seal points between the bottom surface and the O-ring of the seal groove,
The step is inclined with a rising angle with respect to the planar portion;
The width of the flat portion is 40 to 70% of the diameter of the O-ring ,
O-ring seal structure. A cylinder having a cylindrical inner peripheral wall;
A plug inserted into the cylinder and having a cylindrical outer peripheral wall;
A seal structure comprising an O-ring which is held in an annular seal groove formed on either the inner peripheral wall or the outer peripheral wall and seals between the inner peripheral wall and the outer peripheral wall;
The bottom surface of the seal groove is provided with a flat convex portion at the tip at the center, and has a flat portion on both sides and a plurality of step portions serving as seal points.
It is the formed plurality of seal points between the bottom surface and the O-ring of the seal groove,
The step is inclined with a rising angle with respect to the planar portion;
The width of the convex portion is 40 to 70% of the diameter of the O-ring ,
O-ring seal structure. One cylindrical body or plug body in which the seal groove is formed is made of synthetic resin.
The O-ring seal structure according to claim 1. The other plug or cylinder is made of synthetic resin,
The O-ring seal structure according to claim 3 . The container main body, the said cylinder which is the opening part being closed, the said plug body provided with the valve mechanism, the cover cap which fixes the plug body and the valve mechanism to the container main body, and any one of Claims 1-4 With an O-ring seal structure,
A pressurized container for filling a content having an internal pressure.