JP4538238B2 - gasket - Google Patents

Description

  The present invention relates to a sealing gasket.

Conventionally, a flat annular gasket in which a rubber sheet is punched has been used, but it cannot be said that the sealing performance (sealability) is good. Since the gasket contacts two flat surfaces (seal pressing surface) in a large area, the contact surface pressure per unit area is small, and the fluid to be sealed is likely to leak.
Also, in the case where the bolt through hole is arranged in the gasket and the bolt penetrates the gasket, the fluid is likely to leak to the outside through the bolt hole, etc., so that the sealing performance is poor. It was.
On the other hand, a fixed seal that uses two large and small annular rubber rings to seal between two corresponding flat surfaces has also been proposed (for example, see Patent Document 1).
JP-A-9-268616

By the way, in the fixed seal structure using two large and small annular rubber rings, it is necessary to form a concave groove for fitting the rubber ring in a mating member such as a lid, and the problem that machining is troublesome, and There is a problem that it is difficult to assemble the mating member (mounting member) so that the rubber ring is not detached from the groove.
In addition, the conventional gaskets described above and the above-described two rubber ring sizes are used when the pressing surface of the mating member (mounting member) is vertical or inclined, or when mounted from below.
Installation work is difficult (because it is easily deformed).

The gasket according to the present invention --- the sealing material for fixing--is easy to manufacture, has excellent sealing performance (sealing performance) and solves the above-mentioned problems. In this case, fluid can be reliably prevented from leaking from the bolt hole of the mounting member (mating member), the sealing portion is pressed against the pressing surface of the mounting member (mating member) at a high surface pressure, and two An object of the present invention is to provide inexpensively a gasket in which a heavy seal portion is formed and exhibits excellent sealing performance (sealing performance).
Furthermore, even when the pressing surface of the mating member (mounting member) is vertical or inclined, or when mounted from below, it is possible to provide a gasket that can be mounted easily and reliably.
For other purposes. Furthermore, another object is to provide an applicable gasket even when the pressing surface of the mounting member (the mating member) is bent with a predetermined curvature.

The present invention comprises a reinforcing core member of the total flat annular in cross section letter shape, made of a rubber material coated with a reinforcing core member, the first member and the second member in contact with the both sides close to each other In the whole annular gasket used for the sealing portion having the curved pressing surface, the reinforcing core material has elasticity and flexibility that can be deformed along the curved pressing surface, and the rubber material. Is between the inner and outer seal protrusions on the outer peripheral edge side, the inner seal protrusion on the inner peripheral edge side, the inner seal protrusion on the inner peripheral edge side, A hole encircling seal ridge formed on the inner peripheral edge of the bolt through-hole disposed in the inner seal ridge, the outer seal ridge, and the hole encircling seal ridge. from each of the outer surface of the part, as well as projecting from the front and back both sides, inner sealing protrusion and the outer sealing protrusion and hole surrounding sealing protrusion The cross-sectional shape is obtained by setting the same.

Further, the reinforcing core member has a basic hole for penetrating the bolt and a hole for rubber molding positioning, and an adhesive is omitted from the joint surface between the reinforcing core member and the rubber member .

As a double seal structure consisting of an inner seal protrusion and an outer seal protrusion or hole-enclosing seal protrusion,
Always stable and exhibits excellent sealing performance. In particular, in a structure in which the bolt penetrates the gasket and the two members are tightened with the bolt, it is possible to reliably prevent fluid from leaking from the bolt holes of the two members (mounting members).
Further, even when the pressing surface of the sealed portion is vertical or inclined, or when a gasket is attached from below, it can be reliably and easily attached. Furthermore, the present invention can be applied even when the pressing surface of the sealed portion is curved.

Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments.
1 to 5 show an embodiment of a gasket 1 (as a fixed sealing material) according to the present invention. The gasket 1 has a circular ring shape as a whole, and has a substantially single cross-sectional shape. is there.

FIG. 2 is a plan view of FIG. 1 and FIG. 2 showing an AA enlarged cross section thereof, and (BB) and (CC) of FIG.
3 (a), 3 (b), and 3 (c) showing respective enlarged cross sections of (DD), the gasket 1 is composed of a reinforcing core material 2 and a rubber material 3 covering the reinforcing core material 2. The reinforcing core member 2 has a single letter in cross section and is entirely a (thin) flat plate ring. The material is made of aluminum alloy, stainless steel, other metals, or hard plastic, and maintains the overall shape. The material has moderate rigidity, elasticity, and flexibility.

The material of the rubber material 3 is nitrile rubber, fluorine rubber, silicone rubber, other rubber, or soft plastic. It is selected from its resistance corresponding to the fluid to be sealed.
The rubber material 3 has a front surface 2 a and a back surface 2 b of the core material 2.
2b is the same even if it is turned upside down, and there is no distinction between them.
Between the inner seal ridges 11 and 11 on the inner peripheral edge side, the outer seal ridges 12 and 12 on the outer peripheral edge side, and the inner and outer seal ridges 11 and 12 ── intermediate position in the width direction ── And the hole surrounding seal ridges 13 and 13 formed integrally around the bolt through-hole 4 (inner peripheral edge) disposed in ─.
In addition, the inner seal ridge 11, the outer seal ridge 12, and the hole-enclosing seal ridge 13 are formed so as to protrude from the outer surfaces of the thin strip-like main body portions 3a and 3b. That is, both sides of the gasket 1
The seal protrusions 11, 12, and 13 are respectively provided on the 31 and 32 sides. In addition, the cross-sectional shapes (cross-sectional dimensions) of the inner seal ridge 11, outer seal ridge 12, and hole surrounding seal ridge 13 are set to be the same as shown in FIG.

Specifically, the inner seal ridges 11, 11 projecting to the front and rear surfaces 31, 32 are integrated at the center in the thickness direction of the gasket 1 to form an inner ring portion 41 having a substantially elliptical or circular cross section. To do. Further, the outer seal ridges 12 and 12 projecting to the front and rear surfaces 31 and 32 are integrated at the central portion in the thickness direction of the gasket 1 to form an outer peripheral ring portion 42 having a substantially elliptical or circular cross section. In addition, the hole-enclosing seal ridges 13, 13 projecting to the front and back sides 31, 32 are located in the center of the gasket 1 in the thickness direction—the bolt through-hole 4
Are integrated at the central portion in the axial direction of the center to form a hole inner peripheral ring portion 43 having a substantially elliptical or circular cross section. In FIG. 2, reference numeral 7 denotes a bolt-penetrating basic hole penetrating the reinforcing core member 2, and it can be said that the rubber part is connected to the front and back in the basic hole 7. .
In this way, the cross-sectional shapes of the seal protrusions 11, 12, and 13 are the same, so that the front surface 31 and the back surface
The protrusion height to 32 is the same.

In FIG. 1, 5 and 5 are positioning holes at the time of molding, and as shown in the enlarged cross-sectional view of FIG. 3 (c), the positioning holes 5 are formed of the reinforcing core material 2 and the thin strip-shaped main body. As shown in FIG. 1, two are arranged at 180 ° symmetrical positions as shown in FIG. 1, and the reinforcing core material 2 is placed at an accurate position inside the rubber material 3 during rubber molding. In other words, in other words, the reinforcing core member 2 is held at an accurate position in the cavity of the mold at the time of rubber molding, so that each part of the rubber member 3 is molded into an accurate shape and size. To act. The reinforcing core member 2 is not covered with rubber on the inner surface of the positioning hole 5.

Next, in FIG. 1, reference numeral 6 denotes a rubber part joining hole penetrating the reinforcing core member 2, and FIG.
As shown in the enlarged cross-sectional view of FIG. 2, the rubber material 3 fills the hole 6 of the reinforcing core material 2, and the thin band-like main body portions 3 a and 3 b of the rubber material 3 are connected and integrated with each other (on the inner surface side). Thus, the thin strip-shaped main body portions 3a and 3b are prevented from being separated from the reinforcing core material 2.

Further, in FIG. 1, a plurality of bolt through holes 4 are arranged at equal intervals in the circumferential direction, and a rubber part bonding hole 6 is arranged at a central position between adjacent bolt through holes 4, 4. The positioning hole 5
Is arranged in the center between a predetermined bolt through hole 4 and a rubber part bonding hole 6 adjacent thereto.
In addition, each hole 4, 5, 6 is arrange | positioned in the center of the width direction of the reinforcing core material 2 (gasket 1).

As described above, at the intermediate portion in the width direction of the reinforcing core member 2, the thin strip-like main body portions 3 a and 3 b are connected and integrated with each other by the rubber portion joining holes 6 and the bolt through holes 4 (basic holes 7). Therefore, the thin strip-shaped main body portions 3a and 3b have an advantage that they are not separated (separated) from the reinforcing core material 2, and an adhesive can be omitted from the mutual joining surface between the reinforcing core material 2 and the rubber material 3. .
If desired, the number of rubber part bonding holes 6 can be reduced or omitted.
Also in this case, since the rubber part is connected and integrated in the basic hole 7, the adhesive can be omitted.
Of course, depending on the use conditions and applications, in any of the above cases, using an adhesive,
It is also preferable to increase the bonding strength of one layer.

By the way, the advantage by having the above-mentioned positioning hole 5 is as follows. If the positioning hole 5 is not provided, two (for example) of the basic holes 7 must be used for positioning, and the hole diameter cannot be made sufficiently large. It is also difficult to form the portion 15--the circular cross section or the elliptical portion 15 in FIG. 2 sufficiently large. As described above, the hole surrounding seal ridge 13 is connected to the inner and outer seal ridges 11, 12 as shown in FIG. It solves the problem that it is difficult to form the same cross-sectional dimensions (same cross-sectional shape).

Next, FIGS. 4 and 5 are main part sectional views illustrating the use state of the gasket 1 according to the present invention, and 8 and 9 are pressures that come close to each other and come into contact with both the front and back surfaces of the gasket 1. Surfaces 8a and 9
It is the 1st member 8 and the 2nd member 9 which have a.
FIGS. 4 and 5 show the state in which the enlarged cross section of FIGS. 2 and 3 (c) is in the middle of being clamped (pressed) between the first and second members 8 and 9, respectively. 4 and 5 in the final attachment state.
Although it is usually slightly (further) compressed, the intermediate state is shown so that the compression state of the rubber material 3 can be easily understood.

For example, the first member 8 corresponds to a lid of a fluid storage unit (oil tank or the like), and the second member 9 corresponds to a fluid storage tank (oil tank container) or the like. As can be seen from FIGS. 4 and 5, even if the reinforcing core 2 is a metal (or hard plastic), the pressing surface 8a, Even if 9a is curved, this curved pressing surface 8
The elasticity and flexibility which can be deformed along a and 9a can be exhibited. For example, the inspection lid part (accelerator panel part) of the fuel filler of an airplane fuel tank has many pressing surfaces 8a and 9a in the shape of a curved surface, and can be said to be suitable for such a part.

4 and 5, a bolt 17 is inserted through the through hole 16 formed in the first member 8, and the second member 9
When the screw hole 18 is screwed, the inner seal ridge 11, the outer seal ridge 12 and the hole surrounding seal ridge 13 of the gasket 1 are brought into a pressure contact state, and gradually compressively elastically deform, and the pressing surface 8a, The contact surface pressure rises (locally) with respect to 9a and performs a sealing action.

A dotted arrow A indicates one route when fluid is about to leak from the sealed space 20 side to the low pressure (atmosphere) side 21 (in particular, to the low pressure (atmosphere) side through the through hole 16 through which the bolt 17 is inserted. In this case, the two seal portions of the inner seal protrusion 11 and the hole surrounding seal protrusion 13 must be exceeded. That is, a double seal structure is formed.
Next, the dotted line arrow B shows the case where the screw hole 18 is open to the low pressure side or the atmosphere side 21 (at the lower side of the figure), and in this case also, leakage is prevented by the same double seal structure. . In addition, screw hole
When 18 is bottomed, leakage in the direction of arrow B naturally does not occur.

Next, FIG. 5 shows that the presence of the positioning hole 5 does not adversely affect external leakage. That is, the fluid freely flows up and down in the figure by the positioning hole 5, but the holes do not correspond to the pressing surfaces 8a and 9a of the first and second members 8 and 9, and leak to the low pressure (atmosphere) side 21. There is nothing.
An arrow C or D indicates a route when a fluid is about to leak from the sealed space 20 side to the low-pressure (atmosphere) side 21, and at that time, two inner seal ridges 11 and two outer seal ridges 12 are shown. This indicates that the seal part must be exceeded, and in this case, a double seal structure is obtained.

Next, in FIG. 6, (a) shows the cross-sectional shape of the seal ridges 11, 12, 13 of the above-described embodiment, which is crossed as shown in (b) to (e). The surface shape is free. That is, as shown in FIG. 6 (b), the seal protrusions 11, 12, and 13 are trapezoidal, as shown in FIG. 6 (c), in a triangular mountain shape (with a rounded top), or as shown in FIG. 6 (d). It is possible to change the cross-sectional shape such as a rounded double mountain shape as shown above, or a double triangular mountain shape as shown in FIG .

As described above, the present invention provides an inner seal protrusion on the inner peripheral edge side in an annular gasket as a whole.
11, an outer seal ridge 12 on the outer peripheral edge side, and a hole surrounding seal ridge 13 around the bolt through hole 4 disposed between the inner and outer seal ridges 11, 12. Therefore, a double seal structure by the inner seal ridge 11 and the outer seal ridge 12 and a double seal structure by the inner seal ridge 11 and the hole surrounding seal ridge 13 are formed, and the fluid flows through any route. Even if it tries to leak to the outside, double sealing is ensured and excellent sealing performance can be exhibited. This improves the safety of equipment to which this gasket is applied and contributes to quality improvement.

Further, the reinforcing member 2 has a flat cross-section and has a flat plate-like annular shape, and a rubber member 3 covering the reinforcing member 2, and the rubber member 3 has an inner periphery. Inner seal ridge 11 on the end edge side, outer seal ridge 12 on the outer peripheral edge side, and hole surrounding seal ridge 13 around the bolt through-hole 4 disposed between the inner and outer seal ridges 11, 12. The double seal structure with the inner seal ridge 11 and the outer seal ridge 12, and the inner seal ridge 11 and the hole surrounding seal ridge.
The double seal structure by 13 is formed, and even if the fluid tries to leak outside through any route, the double seal is surely made and excellent sealing performance can be exhibited. This improves the safety of equipment to which this gasket is applied and contributes to quality improvement. Further, when the gasket mounting sealing pressing surface is inclined or vertical, or when facing downward (like the ceiling surface), the reinforcing core material 2 gives appropriate rigidity, and the gasket mounting operation is easy. Become.

Further, the reinforcing member 2 has a flat cross-section and has a flat plate-like annular shape, and a rubber member 3 covering the reinforcing member 2, and the rubber member 3 has an inner periphery. Inner seal ridge 11 on the end edge side, outer seal ridge 12 on the outer peripheral edge side, and hole surrounding seal ridge 13 around the bolt through-hole 4 disposed between the inner and outer seal ridges 11, 12. Further, the reinforcing core material 2 is
Since it has the basic hole 7 for bolt penetration and the hole 5 for rubber mold positioning, and the adhesive is omitted from the mutual joining surface of the reinforcing core member 2 and the rubber member 3, Savings and omitting the adhesive application process are possible, and inexpensive and easy production is possible. Moreover, when it is discarded after use, it can be sorted according to the material such as metal and rubber, and the environment can be considered.

Also, the inner seal ridge 11, the outer seal ridge 12 and the hole surrounding seal ridge 13 are respectively provided on the front and back surfaces.
When projecting on the 31 and 32 side, a sufficient elastic compression allowance is obtained, and the surface roughness of the sealing pressing surfaces 8a and 8b is large, or when the entire pressing surfaces 8a and 8b are curved surfaces In addition, stable and excellent sealing performance (sealing performance) can be exhibited.
Also, the inner seal ridge 11, the outer seal ridge 12 and the hole surrounding seal ridge 13 are respectively provided on the front and back surfaces.
In addition to projecting on the 31 and 32 side, the inner seal ridge 11, the outer seal ridge 12, and the hole surrounding seal ridge 13 are provided.
By setting the cross-sectional shape to the same (therefore, the height of the protrusions is the same), the elastic compression allowance under use is almost the same, and the double seal structure is always formed stably. In particular, even in the hole surrounding seal protrusion 13 such as a bolt hole, external leakage can be prevented by reliable sealing.

Moreover, the 1st member 8 and the 2nd member 9 which approach mutually and contact both front and back surfaces are the curved-shaped press surface 8a.
, 9a, and the reinforcing core member 2 has elasticity and flexibility that can be deformed along the curved pressing surfaces 8a, 9a. As a gasket for various curved surface parts such as an accelerator panel (inspection port) of a body such as a tank, the applicable range can be expanded, and excellent sealing performance (sealing performance) is exhibited.
The overall shape of the gasket 1 according to the present invention may be an ellipse, an oval, a rectangle, a polygon, and other irregular shapes other than the circular ring shown in FIG. The shape is free.

1 is an overall plan view showing an embodiment of the present invention. It is an AA expanded sectional view of FIG. It is an expanded sectional view, and (a), (b), and (c) are BB, CC, and DD expanded sectional views of Drawing 1, respectively. It is principal part sectional drawing for use condition explanation. It is principal part sectional drawing for use condition explanation. It is principal part sectional drawing for demonstrating a modification.

DESCRIPTION OF SYMBOLS 1 Gasket 2 Reinforcing core material 2a Front surface 2b Back surface 3 Rubber material 3a Thin strip main body 3b Thin strip main body 4 Bolt through hole 5 Positioning hole 7 Basic hole 8 First member 8a Press surface 9 Second member 9a Press surface
11 Inner seal protrusion
12 Outer seal protrusion
13 Hole surrounding seal protrusion
31 Front
32 Back

Claims (2)

1st member which consists of a reinforcement core material (2) with a flat plate-like annular shape and a rubber material (3) coated with the reinforcement core material (2), and comes close to each other and contacts both the front and back surfaces (8) and the second member (9) are used in a sealing portion where the curved pressing surface (8a) (9a) is used as a whole in an annular gasket.
The reinforcing core member (2) has elasticity and flexibility that can be deformed along the curved pressing surface (8a) (9a).
The rubber material (3) includes a thin strip main body (3a) (3b) covering the front surface (2a) and the back surface (2b) of the reinforcing core material (2), and an inner seal protrusion on the inner peripheral edge side. Article (11), the outer sealing protrusion of the outer peripheral edge side (12), the inner outside the inner peripheral edge of the disposed a bolt through-hole (4) between both sealing protrusion (11) (12) A hole-enclosing seal ridge (13) formed,
The inner seal ridge (11), the outer seal ridge (12), and the hole-enclosing seal ridge (13) are connected to the front and back surfaces (31) (31) from the outer surfaces of the thin strip main body (3a) (3b). 32) A gasket characterized in that it is provided on the side and the cross-sectional shapes of the inner seal ridge (11), the outer seal ridge (12), and the hole surrounding seal ridge (13) are set to be the same .   The reinforcing core material (2) has a bolt-penetrating basic hole (7) and a rubber mold molding positioning hole (5). The reinforcing core material (2) and the rubber material (3) The gasket according to claim 1, wherein an adhesive is omitted from the mutual joining surfaces.

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