JPH10227362A - Sealing structure between cylindrical end faces of parts - Google Patents

Abstract

PROBLEM TO BE SOLVED: To put a seal between an end face of a cylindrical aperture of a vessel main body as a first part and an opening of a cap main body as a second part without using an O ring nor a packing. SOLUTION: An outer end face sealing surface 49 which is abutted against an end face sealing surface 45 of an aperture 40 is formed on a cap main body. A cylindrical part 30 as an inner part is arranged inside the cap main body. An inner end face sealing surface 47 is formed on the cylindrical part 30. A gap 52 is formed between the inner end face sealing surface 47 and the outer end face sealing surface 49, and communicated with a hollow part 48 having large capacity.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for sealing a cylindrical opening end face of a container or a cylindrical part. More specifically, the present invention relates to a structure for securely sealing this end face without an O-ring, packing or the like.

[0002]

2. Description of the Related Art Conventionally, when a cap is fitted to a cylindrical opening end of a part, for example, a mouth of a container and sealed, the end face of the opening of the mouth and the inner surface of the cap are made of an elastic material. The seal is ensured by interposing a gasket. However, when the cap is repeatedly attached and detached, the packing may be deteriorated and leakage may occur.

For example, a manual sprayer has a structure in which a cap having a built-in pump mechanism is fitted to an opening of a container main body. A packing is disposed inside the cap, and a mouth of the container main body is provided. A seal is formed between the opening end face of the portion. However, in such a sprayer, the cap is repeatedly attached and detached to discharge or replenish the liquid in the container body, and is used for a long time. Therefore, the packing may be damaged or deteriorated, and the liquid in the container body may leak.

It is conceivable to use a highly durable O-ring as such a packing. However, since the thickness of the container body is generally not so large, the width of the opening end face of the mouth is also narrow, and it is structurally difficult to bring the O-ring into contact with the opening end face. In addition, it is conceivable to seal the O-ring by contacting the O-ring with the outer peripheral surface of the opening of the container body.
A ring groove or the like must be formed, and the whole becomes large. Further, the use of such an O-ring increases the number of assembling steps and increases the manufacturing cost. Furthermore, even this O-ring may be damaged or deteriorated, and its durability is limited.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has been described in connection with the connection between an end face of a cylindrical opening of a first part, such as a mouth of a container, and a second part, such as a cap. O between
An object of the present invention is to provide a sealing structure that can be reliably sealed without a ring or a packing therebetween, has high durability, and has a simple structure.

[0006]

According to a first aspect of the present invention, there is provided an end sealing surface formed on an opening end surface of a first component, and the first sealing member formed on an opening of a second component. An outer end face sealing surface that is in close contact with an outer edge portion of the end face sealing surface of the component; an inner component disposed within the opening of the second component;
An inner end face sealing surface formed on an end face of the inner part and closely contacting an inner edge portion of the end face sealing surface of the first part;
An annular cavity formed between the outer end surface sealing surface and the inner end surface sealing surface, and an annular cavity formed between the inner surface of the second component and the outer surface of the inner component, communicating with the gap; And a part.

[0007] Therefore, this seal structure operates in the same manner as the labyrinth seal, and since the above-mentioned gap communicates with the hollow portion, the operation of the labyrinth seal is extremely high, and is equivalent to the case where an O-ring or packing is interposed. Sealing property is obtained. Further, the inner part does not need to be formed of an elastic material, high durability and reliability can be obtained, and the structure is simple and the manufacturing cost is low.

According to a second aspect of the present invention, the inner part has a cylindrical shape, and an inner ridge is formed on an outer periphery of an end portion of the inner part so as to protrude outward and is continuous in a circumferential direction. Is formed on the inner end face sealing surface, and the cavity is formed by being surrounded by the other side surface of the inner ridge, the outer surface of the inner component, and the inner surface of the second component. It is characterized by the following. Therefore, a cavity having a large capacity can be formed, high sealing performance can be obtained, and the size of the second component can be reduced without increasing the diameter.

According to a third aspect of the present invention, the inner end face sealing surface of one side surface of the inner ridge protrudes from the outer end surface sealing surface of the second component, and The inner end face sealing surface comes into close contact with the end face sealing surface of the first component in a state where the inner ridge is elastically deformed when the components are connected. Therefore, the adhesion between the inner end face sealing surface and the end face sealing face of the first component is good, and the sealing performance can be further improved.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. These embodiments show examples in which the seal structure of the present invention is applied as a seal structure between a container body and a cap of a sprayer.

First, the overall configuration of the sprayer will be described. FIG. 1 shows the entire sprayer. The sprayer has a container body 1 and a cap portion 2, and a pump mechanism 3 is built in the cap portion 2. The liquid in the container body 1 is sprayed from the nozzle 5 by pulling the lever 4. In addition, the above-mentioned cap part 2
A suction pipe 6 is suspended from a lower part of the suction pipe.
Is a flexible tube having great flexibility, and a weight-shaped suction nozzle member 7 is attached to the lower end thereof.

The suction nozzle member 7 is connected to the suction pipe 6.
Has a sufficient weight to bend, and always moves to the lowest position at the bottom of the container body 1 even when the sprayer is tilted. Therefore, even when the container body 1 is sprayed with the container body 1 tilted, the suction nozzle member 7 is always located below the liquid level of the liquid in the container body 1 to enable the liquid to be sucked. 1
It is configured to be able to use all the liquid inside.

The above-mentioned cap portion 2 comprises a cap body portion 1
And a partition member 12 is mounted inside the partition member. These are all parts formed of a thermoplastic synthetic resin material and are integrally molded by injection molding. The partition member 12 allows the cap body 10
A pressure chamber 21 is formed therein, and the inside of the pressure chamber 21 is pressurized by the piston 11 made of the elastic material of the piston mechanism 3 moving forward in the cylinder portion 9 to the left in the drawing.

A ball seat 14 is formed at the center of the partition member 12, and a ball 13 is arranged on the ball seat 14. The ball seat 14 is connected to the suction pipe 6 via a communication pipe 15. The ball seat 14 and the ball 13 constitute a check valve, and the piston 11 retracts to suck the liquid in the container body 1 into the pressure chamber 21 via the suction pipe 6 and As the piston 11 advances, the liquid in the pressure chamber 21 is pressurized and sprayed from the nozzle 5.

The partition member 12 is connected to the cap body 10 by threaded portions 16 and 17 at its upper end. The lower part of the partition member 12 is formed in a cylindrical portion 30. And this cylindrical part 3
A plurality of engagement ribs 25 are provided on the inner peripheral surface of the projection 0 to engage with a tool for rotating the partition member 12 during assembly.

An air communication hole 26 is formed in the cap body 10, and the air communication hole 26 is opened on the inner surface of the cylinder portion 9 and the piston 11 is at a retracted position shown in FIG. The air communication hole 26 is closed by the seal portion of the piston 11, and when the piston 11 advances to the left in the drawing to perform a pressurizing action, the air communication hole 26 Open to the public. The atmosphere communication hole 29 communicates with the inside of the container body 1 through an axial groove (not shown) formed in a part of the threaded portion 16, 17 and the communication hole 22.

With this configuration, the container body 1
The inside is not in communication with the atmosphere when the nebulizer is not used, and even when the nebulizer is knocked down, the container body 1
The liquid inside does not leak to the outside. In addition, when the sprayer is used and the piston 11 advances, the above-mentioned air communication hole 26 is opened to the atmosphere, and the container body 1 is opened.
The inside pressure becomes equal to the atmospheric pressure, and the negative pressure and the like generated in the container body 1 due to the consumption of the liquid in the container body 1 are eliminated.

FIGS. 3 and 4 are enlarged views of the portion A in FIG. 2, FIG. 3 is an exploded view, and FIG. 4 is an assembled view. That is, a male thread 16 is formed on the outer periphery of the upper end of the partition member 12, and a female thread 17 is formed on the inner periphery of the cap body 10, and these are screwed together. Then, the partition member 12 is mounted in the cap body 10. In addition, these screw parts 16,
Reference numeral 17 denotes a tapered thread, and the thread is a so-called mountain-shaped thread having a cross-sectional shape of a mountain.

An annular seal groove 18 concentric with the male thread 16 is formed at the upper end of the partition member 12. The seal groove 18 is formed inside and close to the external thread 16, so that the portion between the seal groove 18 and the external thread 16 is a relatively thin elastically deformable portion. An annular rib-shaped fastening ridge 27 is formed. The upper end of the seal groove 18 is formed with a tapered portion 19 that expands upward.

An annular rib-shaped sealing ridge 20 corresponding to the sealing groove 18 is integrally formed on the inner surface of the cap body 10. The seal ridge 20 is relatively thin and is configured to be elastically deformable.

Then, the male thread portion 1 of the partition member 12 is formed.
When 6 is screwed into female thread 17 of cap body 10,
The seal ridge 20 described above is press-fitted into the seal groove 18, and this portion constitutes a seal structure. As shown in FIG. 3, for example, when the width a of the seal ridge 20 is 1.0, the groove width b of the seal groove 18 is 0.9, and the width of the tapered portion 19 is 0.9. c is formed to be 1.2. The depth of the seal groove 18 is 2.0,
The depth of the tapered portion 19 is 0.5,
Has a protruding height of 2.5, which is set to be larger than the depth of the seal groove 18.

In the above-described sealing mechanism, when the male screw portion 16 and the female screw portion 17 are screwed together, the rotation and screw movement of the male screw portion 16 and the female screw portion 17 cause the seal ridge 20 and the seal groove 18 to move. They are fitted in the axial direction while rotating relatively. In this case, since the width of the seal ridge 20 is larger than that of the seal groove 18, they are press-fitted. In this case, they are slid while being rotated and press-fitted, and since they are formed of a resin material, the fine irregularities on the peripheral surface thereof are crushed by plastic deformation, and this seal ridge 20 is formed.
And the peripheral surface of the seal groove 18 are in close contact with each other, and high sealing performance is obtained.

In this case, due to the press-fitting while rotating as described above, fine streaky irregularities may be generated on the peripheral surface of the seal ridge 20 and the peripheral surface of the seal groove 18. These are all continuous in the circumferential direction. Therefore, there is no generation of a minute gap continuous at least in the axial direction between these peripheral surfaces. Further, these circumferentially streaky irregularities and the minute circumferential gaps formed by these circumferential effects perform the same function as the labyrinth seal, and enhance the sealing performance of this portion. Due to this, this seal structure can achieve the same airtightness and liquid tightness as when an O-ring or packing is interposed.

In this embodiment, in addition to the dimensional relationship between the fitting of the sealing ridge 20 and the sealing groove 18 as described above, the threaded portions 16 and 17 are further tightly fitted together by tightening. ing.

That is, the threaded portions 16 and 17 are tapered threads, and a component force of a diameter decreasing toward the inside in the radial direction is generated in the male threaded portion 16 with the tightening thereof. 1
7 generates a component force for radial expansion toward the outside in the radial direction. As a result, the fastening ridges 27 of the partition member 12 are elastically deformed so as to reduce the diameter, and the sealing ridges 20 are further strongly tightened to enhance the sealing performance. Further, since the threaded portions 16 and 17 are mountain-shaped threads having a thread-shaped cross section, a radial component force is generated by the screwing and tightening, and the fastening ridges 27 are formed in the same manner as described above. Is elastically deformed so as to reduce the diameter, and the sealing ridge 20 is more strongly tightened to enhance the sealing performance.

Since the above-described joint seal structure does not use an O-ring or packing, the size of the seal portion can be reduced, the size can be easily reduced, and the assembly and disassembly can be performed easily. No special device is required for assembly, and the manufacturing cost can be reduced.

Incidentally, the coupling seal structure of this embodiment is as follows.
This is an example designed in accordance with the shapes and dimensions of the cap body 10 and the partition member 12, and as described above, it can be appropriately changed in accordance with the shape and connection of these components. For example, contrary to this embodiment, a seal ridge may be formed on the component side on which the male thread portion is formed, and a seal groove may be formed on the component side on which the female thread portion is formed.

The relationship between the fitting of the sealing ridge and the sealing groove can be changed as appropriate in accordance with the properties of the materials of these parts, the dimensions of the parts, and the like. For example, the entirety of these seal protrusions and seal grooves may be tapered, or only one of them may be tapered. If the seal groove cannot be arranged near the thread depending on the shape of the component, the seal groove may be arranged at a position distant from the thread. In this case, although the above-mentioned fastening ridge cannot be formed, the fitting dimensional relationship between the sealing ridge and the sealing groove is appropriately set as described above, or the sealing ridge and the sealing groove are appropriately tapered. Press-fitting can be achieved.

FIGS. 5 and 6 are enlarged views of the portion B in FIG. 2, FIG. 5 is an exploded view, and FIG. 6 is an assembled view. That is, as described above, this sprayer is configured so that the inside of the container main body 1 and the atmosphere are communicated only through the atmosphere communication holes 26 and the communication holes 22 only during use. Member 12 and cap body 10, and cap body 10 and container body 1
And a sealing property between the opening 40 and the following sealing structure is adopted.

First, the sealing structure between the partition member 12 and the cap body 10 will be described. The lower end of the partition member 12 is formed with the cylindrical portion 30 as described above. Also, the neck 31 of the cap body 10 described above.
Is also formed in a cylindrical shape corresponding to the cylindrical portion 30. The inner peripheral surface of the cylindrical neck portion 31 is formed on the seal inner peripheral surface 33. On the outer periphery of the lower end portion of the cylindrical portion 30, an annular ridge 34 that is formed in a continuous annular shape in the circumferential direction is integrally provided. The outer peripheral surface of the annular ridge 34 is formed on the outer peripheral surface 35 of the seal. The diameter of the seal outer peripheral surface 35 is set to be larger than the seal inner peripheral surface by the dimension shown in FIG. Further, a tapered portion 36 whose diameter is reduced upward is formed at the upper edge portion of the seal outer peripheral surface 35. Also, a tapered portion 39 whose diameter is increased downward is formed at the lower edge of the seal inner peripheral surface 33.

Such a sealing structure is provided by the partition member 1.
2 male thread 16 and female thread 17 of cap body 10
At the time of screwing, the seal outer peripheral surface 3 of the annular ridge 34
5 is press-fitted while being rotationally slid into the inner peripheral surface 33 of the seal, and performs a sealing action as in the case of the first embodiment. In this case, similarly to the above, this seal outer peripheral surface 35 is used.
Although the roundness between the inner peripheral surface 33 and the seal inner peripheral surface 33 is not so high, the above-described cylindrical portion 30 is elastically deformed, so that they come into close contact with each other.

In the seal structure of this embodiment, since the seal portion can be arranged at a position apart from the thread portions 16 and 17, the degree of freedom in designing these parts is increased. This second
In the embodiment of the present invention, a compressive force is not obtained by tightening the threaded portions 16 and 17, but the dimensional relationship of the fitting of the seal outer peripheral surface 35 and the seal inner peripheral surface 33 and the tapering of these are appropriately determined. A suitable press-fitting can be achieved by a simple design.

In this embodiment, since the annular ridge 34 is formed and the outer peripheral surface thereof is used as the seal outer peripheral surface 35, the height, that is, the width of the annular ridge 34 is appropriately set so that the outer peripheral surface of the seal is formed. By setting the area of the surface 35 to an optimal value, higher sealing performance can be achieved.

In this embodiment, it is a matter of course that the form of the above-mentioned sealing structure can be appropriately changed in accordance with the shapes and dimensions of these parts. No need to provide.

In the portion B, the sealing structure of the present invention is employed between the mouth 40 of the container body 1 and the cap body 10. As described above, the sprayer of this embodiment is configured so that the inside of the container body 1 communicates with the outside air only during use as described above. Therefore, between the container body 1 and the cap body 10 as follows. A complete seal structure is employed.

That is, the mouth 40 of the container body 1 has a cylindrical shape, and a male thread portion 43 is formed on the outer periphery thereof, and the female thread portion 44 is formed on the inner periphery of the lower end portion of the cap body 10. Are formed and these are screwed together. And
Although the upper end surface of the mouth portion 40 is formed as an end face sealing surface 45, the width of the end face sealing surface 45 is generally small because the thickness of the container body 1 and the mouth portion 40 is not so large.

The inner surface of the opening at the lower end of the cap body 10 has an outer ridge 50 projecting in the axial direction.
Is formed, and the end face is formed on the outer end face sealing face 49. Further, on the outer periphery of the lower end portion of the cylindrical portion 30 of the partition member 12, an elastically deformable annular inner protruding ridge 46 protruding radially outward is formed, and the lower end surface thereof is formed on the inner end face sealing surface 47. Have been. The inner end face sealing surface 47 is formed in a conical shape such that its outer edge is located below the outer end face sealing face by the dimension shown in FIG.

The gap between the inner edge of the outer end face sealing surface 49 and the outer edge of the inner end face sealing face 45 is shown in FIG.
A gap 52 is formed as shown in FIG. An annular cavity 48 having a relatively large volume is formed between the inner ridge 46 and the annular ridge 34 described above, and the gap 52 communicates with the cavity 48.

In the sealing structure configured as described above, when the mouth portion 40 of the container body 1 is screwed into the cap body portion 10, the outer edge of the end face sealing surface 45 of the mouth portion 40 is formed as described above. The inner edge portion is pressed against the outer end surface sealing surface 45 to press the inner end surface sealing surface 45 to seal. In this case, the inner ridge 46 is elastically deformed upward as shown in FIG. 6, and the inner end face sealing surface 47 is securely brought into close contact with the end face sealing face 45 to enhance the sealing performance.

In this case, since the width of the end face sealing surface is not so large, complete sealing cannot be obtained only by the close contact as described above. However, since the gap 52 is formed between the inner end surface sealing surface 47 and the outer end surface sealing surface 49, the sealing performance is improved by the same operation as the labyrinth seal. Further, since the gap 52 communicates with the large-volume cavity 48 as described above, the action of the labyrinth seal is further enhanced. By such an operation, almost the same complete sealing performance as in the case where an O-ring or packing is interposed in this portion can be obtained.

The sealing structure of this portion is not limited to the above. For example, the above annular cavity may be formed on the outer member, that is, on the cap body side,
Further, it may be formed on both the cap body side and the cylindrical portion side of the partition member.

The above-described sealing structure of the opening end face is not limited to the sealing structure between the mouth and the cap of the container body of the sprayer as described above, but also the cylindrical opening of various parts. It is needless to say that the end face seal structure can be generally adopted.

[0043]

As described above, the seal structure of the present invention operates in the same manner as the labyrinth seal, and since the above-mentioned gap communicates with the cavity, the operation of the labyrinth seal is extremely high, and the O-ring and the packing are used. The same sealing property as that obtained by interposing is obtained. Therefore, sealing can be reliably performed even on a narrow end face such as an open end face. Further, the inner part does not need to be formed of an elastic material, and high effects such as high durability and reliability are obtained, and the structure is simple and the manufacturing cost is low.

[Brief description of the drawings]

FIG. 1 is a side view of a sprayer according to an embodiment of the present invention.

FIG. 2 is a longitudinal sectional view of a part of the cap portion of FIG.

FIG. 3 is an enlarged longitudinal sectional view showing a portion A of FIG. 2 in an exploded state;

FIG. 4 is an enlarged longitudinal sectional view showing a portion A in FIG. 2 in an assembled state.

FIG. 5 is an enlarged longitudinal sectional view showing a portion B of FIG. 2 in an exploded state.

FIG. 6 is an enlarged longitudinal sectional view of a portion B in FIG. 2 in an assembled state.

DESCRIPTION OF SYMBOLS 1 Container body 2 Cap part 10 Cap body part 12 Partition member 40 Mouth part 43 Male thread part 44 Female thread part 45 End face sealing surface 46 Inner ridge 47 Inner end face sealing face 48 Cavity part 49 Outer end face Seal surface 52 gap

Claims (3)

[Claims] 1. A structure for sealing a cylindrical opening end surface of a component, wherein the sealing surface is formed on an opening end surface of a first component, and the second sealing surface is formed on an opening of a second component. An outer end sealing surface closely contacting an outer edge portion of the end sealing surface of the first component, an inner component disposed in an opening of the second component, and the first component formed on an end surface of the inner component; An inner end face sealing surface in close contact with an inner edge portion of the end face sealing surface, a gap formed between the outer end face sealing face and the inner end face sealing face, an inner face of the second component, and the inner side. An annular cavity formed between the outer surface of the component and the gap and communicating with the gap, a sealing structure for a cylindrical end surface of the component. 2. The inner part has a cylindrical shape, and an inner ridge is formed on an outer periphery of an end thereof and protrudes outward and is continuous in a circumferential direction, and one side surface of the inner ridge is the inner end face sealing surface. 2. The component according to claim 1, wherein the cavity is formed by being surrounded by another side surface of the inner ridge, an outer surface of the inner component, and an inner surface of the second component. Seal structure of cylindrical end face. 3. An inner end face sealing surface of one side surface of the inner ridge protrudes from an outer end face sealing surface of the second component, and when the first component is connected, the inner protruding surface is sealed. 3. The sealing structure for a cylindrical end surface of a component according to claim 2, wherein said inner end surface sealing surface is in close contact with said end surface sealing surface of said first component in a state where said strip is elastically deformed.