JPH0550242U - Container seal structure - Google Patents

Abstract

(57) [Summary] [Constitution] The upper surface of the outer periphery of the opening 20 of the container and the lower surface of the cap of the opening are the sealed surfaces 25a, 27a, and the annular surface interposed between the sealed surfaces 25a, 27a. The seal 28 is a first member 28a that is elastically deformable in the vertical direction.
And a second member 28b integrated with the upper and lower surfaces of the first member 28a. The first member 28a has a spring constant larger than that of the second member 28b.
Has greater adhesion to the sealed surfaces 25a and 27a than the first member 28a. [Effect] The contact pressure between the annular seal and the surface to be sealed can be increased and the adhesion can be improved, so that a good sealing function can be achieved.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a seal structure in an opening of a liquid container closed by a cap.

[0002]

[Prior Art]

 For example, in an oil tank for a hydraulic power steering device, the outer peripheral upper surface of the oil injection opening and the lower surface of the cap of the opening are the sealed surfaces, and a rubber annular seal is provided between the sealed surfaces. Sealing is performed by interposing it.

[0003]

[Problems to be solved by the device]

 In the above-mentioned sealing structure, the annular seal and the surface to be sealed are in surface contact with each other, so the contact pressure is small and a sufficient sealing function cannot be achieved, and the oil in the tank is not There was a risk of leakage if it wavy due to vibration.

Therefore, it is conceivable to use a material having a larger spring constant than rubber as the material of the annular seal to increase the contact pressure with the surface to be sealed. However, a material having a large spring constant is used as the material of the annular seal. Then, the adhesiveness with the surface to be sealed is reduced, and the beam sealing function is reduced.

An object of the present invention is to provide a container seal structure capable of solving the above technical problems.

[0006]

[Means for Solving the Problems]

 A feature of the present invention is that the outer peripheral upper surface of the opening of the container and the lower surface of the cap of the opening are the sealed surfaces, and an elastic annular seal is interposed between the sealed surfaces. In the above seal structure, the annular seal is composed of a first member that is elastically deformable in the vertical direction and a second member that is integrated with the upper and lower surfaces of the first member, and the first member is more than the second member. Has a large spring constant, and the second member has a greater adhesion to the sealed surface than the first member.

[0007]

[Action]

 According to the configuration of the present invention, by increasing the spring constant of the first member forming the annular seal and increasing the close contact with the sealed surface of the second member, the annular seal and the sealed surface are It is possible to increase the contact pressure and improve the adhesion.

[0008]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings.

The oil tank 1 shown in FIGS. 2 and 3 is provided in, for example, a hydraulic circuit of a hydraulic power steering device, and includes a tank main body 2 for storing oil and an oil tank 2 for storing oil in the tank main body 2. A pipe 5 forming an inflow port 3 and a pipe 6 forming an outflow port 4 for oil from the tank body 2 are provided. The tank body 2 is made of synthetic resin, and is formed by welding an upper member 7 and a lower member 8. The lower member 8 is integrally formed with the pipes 5 and 6. A peripheral wall 10 is integrally formed with the tank main body 2 on the bottom wall of the tank main body 2, and an oil outflow chamber 11 surrounded by the peripheral wall 10 is formed. The upper opening of the oil outflow chamber 11 is covered with a planar oil filter 12. The inflow port 3 opens to the side wall of the tank body 2 outside the oil outflow chamber 11, and the outflow port 4 communicates with the oil outflow chamber 11.

A fuel filler port 20 is formed at the upper end of the tank body 2, and the fuel filler port 20 is opened and closed by a cap 22 having a level gauge 21. The cap 22 is formed by connecting an outer peripheral member 23 and an inner peripheral member 24 made of synthetic resin, and the level gauge 21 is integrated with the inner peripheral member 24.

The inner peripheral member 24 has a large diameter portion 25 having a diameter larger than that of the fuel filler port 20 on the upper side and a small diameter portion 26 having a diameter smaller than that of the fuel filler port 20 on the lower side. Further, an inward flange 27 is formed on the outer periphery of the fuel filler port 20 so as to project inward in the radial direction. The lower surface of the large diameter portion 25 and the upper surface of the inward flange 27 are sealed surfaces 25a and 27a, and an elastic annular seal 28 is interposed between the sealed surfaces 25a and 27a.

A rectangular plate spring 29 is attached to the inner peripheral member 24, and the longitudinal direction of the plate spring 29 is along the radial direction of the fuel filler port 20, and the length thereof is larger than the diameter of the fuel filler port 20. Has been long. A pair of notches 30 are formed in the inward flange 27 so that the leaf spring 29 can be inserted into the tank body 2. As a result, the leaf spring 29 is inserted into the tank body 2 through the notch 30 and the cap 22 is rotated, so that the leaf spring 29 and the cap 22 form an annular seal member 28 as shown in FIG. The inward flange 27 is sandwiched and the annular seal member 28 is pressed against the sealed surfaces 25a and 27a.

As shown in FIG. 4, a pair of downwardly projecting stoppers 32 are integrally formed on the lower surface of the inward flange 27 at positions separated by 180 ° in the circumferential direction. By contacting with, the circumferential position of the cap 22 with respect to the tank body 2 is determined.

As shown in (1) of FIG. 5, the annular seal 28 is composed of a first member 28a and a second member 28b integrated with the upper and lower surfaces of the first member 28a. .. In the present embodiment, the first member 28a is made of spring steel, and is formed such that the radial center portion projects upward with respect to the radial end portions. As a result, the first member 28a is compressed by the both sealed surfaces 25a and 27a from above and below and elastically deforms. The second member is made of rubber in this embodiment, and is baked on the upper and lower surfaces of the first member. As a result, the first member 28a has a larger spring constant than the second member 28b, and the second member 28b has greater adhesion to the sealed surfaces 25a and 27a than the first member 28a. As a result, the contact pressure between the annular seal 28 and the sealed surfaces 25a, 27a is increased, the adhesion is improved, and the leakage of oil from the oil supply port 20 is prevented.

Further, in this embodiment, as shown in FIGS. 3 and 6, the sealed surface 27 a of the inward flange 27 is circumferentially 90 ° apart from the contact portion between the leaf spring 29 and the flange 27. At the second position, the bulge portion 27a 'bulges upward. This is because when the annular seal 28 is pressed against the sealed surfaces 25a and 27a by the leaf spring 29 as in this embodiment, if both the sealed surfaces 25a and 27a are flat, the leaf spring 29 and the flange 27 are The pressing force is increased at the contact portion, but the pressing force becomes smaller as the distance from the contact portion is increased in the circumferential direction, and the pressing force becomes the smallest at the position 90 ° in the circumferential direction and the sealing function is improved. There is a risk that it will fall. Therefore, the bulging portion 27a 'is provided to prevent the pressing force from decreasing. The height and circumferential length of the bulging portion 27a 'are appropriately determined so that the pressing force can be made uniform. Further, as shown in FIG. 6B, a bulging portion 25a 'that bulges downward may be formed on the sealed surface 25a of the cap 25, or both sealed surfaces 25a, 27a. You may make it form a bulge part.

The present invention is not limited to the above embodiment. For example, the cap may be screwed onto the container. Further, in the above embodiment, spring steel was used as the first member and rubber was used as the second member. However, the first member is elastically deformable in the vertical direction and has a larger spring constant than the second member. The material of the member is not particularly limited as long as it has greater adhesion to the surface to be sealed than the first member. Further, the sectional shape of the annular seal 28 is not limited to the above embodiment, and for example, as shown in (2) and (3) of FIG. 5, one side in the radial direction is bent upward with respect to the other side. It may be molded, or, as shown in (4), (5), and (6) of FIG. 5, the lower surface of the second member 28b may be a flat surface. Further, the present invention can be applied to a seal structure in an opening of a container other than the oil tank.

[0017]

[Effect of the device]

 According to the container sealing structure of the present invention, the contact pressure between the annular seal and the surface to be sealed can be increased and the adhesion can be improved, so that a good sealing function can be achieved.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a main part of a container sealing structure according to an embodiment.

FIG. 2 is a sectional view of a container according to an embodiment.

FIG. 3 is a plan view of the container according to the embodiment.

FIG. 4 is a bottom view of the upper member of the container according to the embodiment.

FIG. 5 is a sectional view of an annular seal according to an embodiment.

6 is a sectional view taken along line VI-VI of FIG.

[Explanation of symbols]

 1 Oil Tank (Container) 20 Oil Filling Port (Opening) 22 Caps 25a, 27a Sealed Surface 28 Annular Seal 28a First Member 28b Second Member

Claims (1)

[Scope of utility model registration request] 1. A container seal structure in which an upper peripheral surface of an opening of a container and a lower surface of a cap of the opening are surfaces to be sealed, and an elastic annular seal is interposed between the both surfaces to be sealed. The annular seal is composed of a first member that is elastically deformable in the vertical direction and a second member that is integrated with the upper and lower surfaces of the first member, and the first member has a spring constant higher than that of the second member. The seal structure for a container is characterized in that the second member is larger, and the second member has greater adhesion to the surface to be sealed than the first member.