JP2005195091A - Gasket - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gasket having excellent seal performance even with a through hole in which a bolt is inserted. <P>SOLUTION: This gasket is shaped like a ring as a whole body. In addition to an inner seal projection 11 and an outer seal projection 12, a hole enclosing seal projection 13 to seal the periphery of the through hole 4 for the bolt is also provided. It has a reinforced core member 2 inside. <P>COPYRIGHT: (C)2005,JPO&NCIPI

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 is in contact with two flat surfaces (seal pressing surface) in a large area, the contact surface pressure per unit area is small, the fluid to be sealed is likely to leak, and the bolt through hole is provided in the gasket. In the case of the structure in which the bolt penetrates the gasket, the sealing performance is poor because the fluid easily leaks to the outside through the bolt hole.
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. Objective. 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 relates to a generally annular gasket, an inner seal protrusion on the inner peripheral edge side, an outer seal protrusion on the outer peripheral edge side, and a bolt through hole disposed between the inner and outer seal protrusions. And a hole-enclosed seal ridge around the periphery.
In addition, the cross section is composed of a single-plate-shaped reinforcing core material having a flat plate shape and a rubber material coated with the reinforcing core material, and the rubber material is formed on the inner peripheral edge side in the whole annular gasket. This is a configuration having a seal protrusion, an outer seal protrusion on the outer peripheral edge side, and a hole surrounding seal protrusion around the bolt through hole disposed between the inner and outer seal protrusions.
In addition, the cross section is composed of a single-plate-shaped reinforcing core material having a flat plate shape and a rubber material coated with the reinforcing core material, and the rubber material is formed on the inner peripheral edge side in the whole annular gasket. A seal protrusion, an outer seal protrusion on the outer peripheral edge side, and a hole surrounding seal protrusion around the bolt through hole disposed between the inner and outer seal protrusions, and the reinforcing core The material had a basic hole for bolt penetration and a hole for rubber molding positioning, and the adhesive was omitted from the joint surface between the reinforcing core material and the rubber material.

  Further, the inner seal ridge, the outer seal ridge, and the hole surrounding seal ridge are respectively provided on both the front and back surfaces. Further, the inner seal ridge, the outer seal ridge and the hole surrounding seal ridge are respectively provided on both the front and back surfaces, and the inner seal ridge, the outer seal ridge and the hole surrounding seal ridge are crossed. The surface shape is set to be the same. Further, the first member and the second member that come close to each other and come into contact with the front and back surfaces are gaskets used in a sealed portion having a curved pressing surface, and the reinforcing core material is along the curved pressing surface. Deformable elasticity and flexibility.

As a double seal structure consisting of an inner seal ridge and an outer seal ridge or a hole-enclosing seal ridge, it is always stable and exhibits excellent sealing performance (sealability). 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. Further, 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, FIG. 2 showing an AA enlarged section thereof, and FIG. 3 (a) showing respective enlarged sections of (BB), (CC), and (DD) of FIG. (B) In (c), the gasket 1 is composed of a reinforcing core material 2 and a rubber material 3 covering the reinforcing core material 2, and the reinforcing core material 2 has a single cross-sectional shape and is entirely (thin-walled). ) It is a flat plate, and the material is made of aluminum alloy, stainless steel, other metals, or hard plastic, and has a suitable rigidity, elasticity, and flexibility for maintaining the overall shape.

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 is a thin wall covering the front surface 2a and the back surface 2b of the core material 2—the two surfaces 2a and 2b in FIG. Between the strip-shaped body 3a, 3b, the inner seal ridges 11, 11 on the inner peripheral edge side, the outer seal ridges 12, 12 on the outer peripheral edge side, and the inner and outer seal ridges 11, 12 between The hole surrounding seal ridges 13 and 13 formed integrally around the bolt through-hole 4 (inner peripheral edge) disposed at the intermediate position in the direction are integrally formed.
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, the seal protrusions 11, 12, and 13 are respectively provided on the front and back surfaces 31, 32 of the gasket 1. 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. Also, the hole-enclosing seal ridges 13 and 13 projecting to the front and back sides 31 and 32 are integrated at the thickness direction center portion of the gasket 1 ──axial center portion of the bolt through hole 4. A hole inner peripheral ring portion 43 having a substantially elliptical or circular cross section is formed. 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 made the same, and thus the protruding height dimensions to the surface 31 and the back surface 32 are made 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 through the reinforcing core member 2. As shown in the enlarged cross-sectional view of FIG. The hole 6 of the core material 2 is filled, and the thin band-shaped main body portions 3a and 3b of the rubber material 3 are connected and integrated with each other (on the inner surface side). It is preventing liberation ---- floating ---.

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 disposed in the center between a predetermined bolt through hole 4 and a rubber part joining 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 the rubber part bonding holes 6 can be reduced or omitted. In this case, since the rubber part is connected and integrated in the basic hole 7, an adhesive is used. Can be omitted.
Of course, depending on the use conditions and applications, it is also preferable to increase the bonding strength by using an adhesive in combination in any of the above cases.

  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. The first member 8 and the second member 9 have surfaces 8a and 9a.
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. In the final attached state, the compression is slightly (further) than in FIGS. 4 and 5, but it is in the middle of the rubber material 3 so that it 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, elasticity and flexibility that can be deformed along the curved pressing surfaces 8a, 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, the bolt 17 is inserted into the through hole 16 formed in the first member 8 and screwed into the screw hole 18 of the second member 9. The strip 11, the outer seal projection 12 and the hole surrounding seal projection 13 are brought into a pressure contact state, gradually compressively elastically deformed, and the contact surface pressure is increased (locally) with respect to the pressing surfaces 8a and 9a to be sealed. It works.

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. . When the screw hole 18 is bottomed, leakage in the direction of arrow B does not naturally 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. Furthermore, it is also free to form the seal protrusions 11, 12, 13 only on either the front or back (not shown).

  As described above, the present invention comprises an inner seal ridge 11 on the inner peripheral edge side, an outer seal ridge 12 on the outer peripheral edge side, and both the inner and outer seal ridges 11, 12. Since the hole surrounding seal protrusion 13 around the bolt through hole 4 disposed between the inner seal protrusion 11 and the outer seal protrusion 12 is used, the double seal structure and the inner seal are provided. A double seal structure is formed by the ridge 11 and the hole surrounding seal ridge 13, and even if fluid leaks to the 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, 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. Therefore, a double seal structure with the inner seal protrusion 11 and the outer seal protrusion 12 and a double seal structure with the inner seal protrusion 11 and the hole surrounding seal protrusion 13 are formed. Regardless of which route the fluid 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, 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. Furthermore, the reinforcing core material 2 has the bolt-penetrating basic hole 7 and a rubber mold molding positioning hole 5, and the reinforcing core material 2 and the rubber material 3 are joined to each other. Since the adhesive is omitted from the surface, it is possible to save the adhesive and to omit the adhesive application process, and it is possible to manufacture at low cost and easily. 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.

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

Further, the first member 8 and the second member 9 that come close to each other and come into contact with the front and back surfaces are gaskets used in a sealed portion having curved pressing surfaces 8a, 9a, and the reinforcing core material 2 is the curved portion. If it is configured to have elasticity and flexibility that can be deformed along the pressing surfaces 8a and 9a, it can be used as a gasket for various curved parts such as an accelerator panel (inspection port) of a body such as a fuel tank of an airplane. Can be expanded and exhibits excellent sealing performance.
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.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Gasket 2 Reinforcement core material 3 Rubber material 4 Bolt through-hole 5 Positioning hole 7 Basic hole 8 1st member 8a Press surface 9 2nd member 9a Press surface
11 Inner seal protrusion
12 Outer seal protrusion
13 Hole surrounding seal protrusion
31 Front
32 Back

Claims (6)

  Between the inner seal ridge (11) on the inner peripheral edge, the outer seal ridge (12) on the outer peripheral edge, and both the inner and outer seal ridges (11) (12) And a hole encircling seal protrusion (13) around the bolt through-hole (4) disposed in the gasket.   It consists of a reinforcing core material (2) having a flat cross-section and a flat plate-like annular shape, and a rubber material (3) covering the reinforcing core material (2). 3) is disposed between the inner seal ridge (11) on the inner peripheral edge side, the outer seal ridge (12) on the outer peripheral edge side, and both the inner and outer seal ridges (11) (12). A gasket comprising a hole surrounding seal protrusion (13) around the bolt through hole (4).   It consists of a reinforcing core material (2) having a flat cross-section and a flat plate-like annular shape, and a rubber material (3) covering the reinforcing core material (2). 3) is disposed between the inner seal ridge (11) on the inner peripheral edge side, the outer seal ridge (12) on the outer peripheral edge side, and both the inner and outer seal ridges (11) (12). A hole encircling seal protrusion (13) around the bolt through-hole (4), and the reinforcing core (2) includes the bolt-through basic hole (7) and a rubber mold molding positioning A gasket having a use hole (5), wherein the adhesive is omitted from the joint surface between the reinforcing core member (2) and the rubber member (3).   The said inner seal protrusion (11), the outer seal protrusion (12), and the hole surrounding seal protrusion (13) are each protrudingly provided in the front and back both surfaces (31) (32) side, respectively. Gasket.   The inner seal ridge (11), the outer seal ridge (12), and the hole-enclosing seal ridge (13) are provided on the front and back surfaces (31) and (32), respectively, and the inner seal ridge ( The gasket according to claim 1, 2 or 3, wherein the cross-sectional shapes of 11), the outer seal protrusion (12), and the hole surrounding seal protrusion (13) are set to be the same.   The first member (8) and the second member (9) that come close to each other and come into contact with both front and back surfaces are gaskets used in a sealed portion having curved pressing surfaces (8a) (9a), the reinforcing core The gasket according to claim 2, 3, 4 or 5, wherein the material (2) has elasticity and flexibility that can be deformed along the curved pressing surface (8a) (9a).

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