WO2017187978A1 - Joint d'étanchéité - Google Patents

Joint d'étanchéité Download PDF

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Publication number
WO2017187978A1
WO2017187978A1 PCT/JP2017/014936 JP2017014936W WO2017187978A1 WO 2017187978 A1 WO2017187978 A1 WO 2017187978A1 JP 2017014936 W JP2017014936 W JP 2017014936W WO 2017187978 A1 WO2017187978 A1 WO 2017187978A1
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WO
WIPO (PCT)
Prior art keywords
outer peripheral
gasket
base
inner peripheral
peripheral portion
Prior art date
Application number
PCT/JP2017/014936
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English (en)
Japanese (ja)
Inventor
主弥 相原
功 丹治
健 渡邉
Original Assignee
Nok株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nok株式会社 filed Critical Nok株式会社
Priority to JP2018514254A priority Critical patent/JPWO2017187978A1/ja
Publication of WO2017187978A1 publication Critical patent/WO2017187978A1/fr

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/08—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with exclusively metal packing

Definitions

  • the present invention relates to a gasket, and more particularly to a gasket used in a vehicle, a general-purpose machine, or the like.
  • a gasket In a vehicle or a general-purpose machine such as an automobile, a gasket is used to seal a casing in an engine or a device that houses an electronic component.
  • the gasket for example, is elastically deformed by being sandwiched between a pair of members that are combined to form a casing, and is sealed between the pair of members, thereby sealing the casing.
  • Automobiles may travel in the beach or in areas where snow melting agent is sprayed. At this time, salt water or snow melting agent adheres to the parts of the automobile, and salt water or snow melting agent enters the gaps between the members that sandwich the gasket. May stay. Corrosion may occur in the member that sandwiches the gasket by the retained salt water or snow melting agent.
  • the member for sandwiching the gasket is formed of an aluminum alloy, aluminum has a high ionization tendency, and therefore, the member for sandwiching the gasket is easily corroded by the retained salt water or the snow melting agent. If this corroded part exceeds the gasket seal line, the sealing function of the gasket is reduced or disappears. For this reason, the salt spray test is performed in advance on the parts where the gasket is used, and the corrosion resistance performance is evaluated. In the salt spray test, salt water is retained in the gap between the parts that sandwich the gasket in the part provided with the gasket, and this part is repeated alternately in a dry state and a wet state to evaluate the corrosion resistance against salt water. Is done.
  • the member sandwiching the gasket is not corroded by salt water or a snow melting material, and for suppressing the corrosion of the member sandwiching the gasket by the salt water or the snow melting material.
  • a gasket structure has been proposed.
  • Patent Document 1 in a free state where no clamping is performed, the inner peripheral portion 103 and the outer peripheral portion 104 that extend in parallel with each other and the inner peripheral portion 103 and the outer peripheral portion 104 are slanted.
  • Two metal gaskets 101 each having a metal substrate 102 formed by a bead portion 105 extending in the direction and a rubber layer 106 covering an upper surface and a lower surface of the metal substrate 102 are sandwiched between a pair of members 120 and 121 facing each other.
  • the structure of the gasket 100 to be pressed is disclosed. In the gasket 100, as shown in FIG.
  • the outer peripheral portion 104 of the upper metal gasket 101 is in contact with the upper member 120 via the rubber layer 106, and the outer peripheral portion 104 of the lower metal gasket 101 is lower.
  • the member 121 is brought into contact with the rubber layer 106 to reduce a space in which a corrosive liquid such as salt water stays between the pair of members 120 and 121, and the member 120 and 121 is prevented from being corroded by salt water or the like. I am trying.
  • Patent Document 2 discloses a gasket 110 including a metal substrate 111 and rubber layers 116 covering the upper and lower surfaces of the metal substrate 111 as shown in FIG.
  • the metal substrate 111 includes an inner peripheral portion 112 and an outer peripheral portion 113 that extend parallel to each other in a free state, and a full bead-shaped bead portion 114 that protrudes upward and extends between the inner peripheral portion 112 and the outer peripheral portion 113.
  • the outer peripheral side end portion of the outer peripheral portion 113 has a bent portion 115 formed by bending downward.
  • the gasket 110 is sandwiched between a pair of members 120 and 121, and the outer peripheral side end of the outer peripheral portion 113 and the bead portion 114 are rubberized to the upper member 120.
  • the inner peripheral side end of the outer peripheral portion 113, the outer peripheral side end of the inner peripheral portion 112, and the outer peripheral side end of the bent portion 115 are in contact with the lower member 121 via the rubber layer 116.
  • the gasket 110 reduces the space in which the corrosive liquid such as salt water stays between the pair of members 120 and 121, and suppresses the corrosion of the members 120 and 121.
  • the above-described conventional gaskets 100 and 110 can suppress the corrosion of the members 120 and 121 that sandwich the gaskets 100 and 110.
  • the gasket 100 is sandwiched between the pair of metal gaskets 101, a large fastening force is required to fasten the members 120 and 121.
  • the full bead-shaped bead portion 114 and the bent portion 115 are compressed and sandwiched between the gaskets 110, a large fastening force is required to fasten the members 120 and 121.
  • the present invention has been made in view of the above-described problems, and its purpose is to suppress corrosion caused by salt water or the like of a member that sandwiches a gasket while reducing a fastening force for fastening a pair of members that sandwich the gasket. It is to provide a gasket that can be designed.
  • a gasket according to the present invention is a gasket comprising a metal substrate made of metal and a coating layer formed by an elastic body covering at least a part of the metal substrate, the metal substrate.
  • a metal substrate made of metal and a coating layer formed by an elastic body covering at least a part of the metal substrate, the metal substrate.
  • a bolt that has an upper surface and a lower surface that are opposite to each other and spread between a peripheral edge and an outer peripheral edge, and is a through hole that passes through at least one of the upper and lower surfaces.
  • the inner peripheral portion extends obliquely from the inner peripheral edge of the base toward the side facing the lower surface, and the outer peripheral side faces the lower surface Obliquely extending from the outer peripheral edge of the base toward And wherein the door.
  • the inner peripheral portion is reduced in diameter toward the side facing the lower surface, and the outer peripheral portion is expanded as the side faces the lower surface. It has a diameter.
  • the inner peripheral portion has a conical cylindrical shape
  • the outer peripheral portion has a conical cylindrical shape
  • the outer peripheral portion extends obliquely from the outer peripheral edge of the base portion with a constant length over the entire circumference of the base portion.
  • the gasket which concerns on 1 aspect of this invention WHEREIN is not formed in the site
  • the to-be-recovered layer covers the metal substrate from the side of the base that faces the upper surface and the lower surface.
  • the gasket according to the present invention it is possible to suppress corrosion due to salt water or the like of the member sandwiching the gasket while reducing the fastening force for fastening the pair of members sandwiching the gasket.
  • FIG. 2 is a cross-sectional view in a cross section orthogonal to the extending direction of the gasket along line AA of the gasket shown in FIG. It is sectional drawing which shows the mode of the gasket shown in FIG. 1 in an attachment state.
  • FIG. 5 is a cross-sectional view of the gasket shown in FIG. 4 taken along line AA.
  • FIG. 5 is a cross-sectional view taken along a line BB of the gasket shown in FIG. FIG.
  • FIG. 5 is a cross-sectional view taken along a line CC of the gasket shown in FIG. It is a fragmentary sectional view for showing a schematic structure of the conventional gasket.
  • FIG. 9 (a) is a partial cross-sectional view of another conventional gasket in a free state
  • FIG. 9 (b) is a conventional cross-sectional view of a conventional gasket in a clamped state. It is a fragmentary sectional view of other gaskets.
  • FIG. 1 is a plan view showing a schematic structure of a gasket 1 according to a first embodiment of the present invention
  • FIG. 2 is an extension of the gasket 1 along the line AA of the gasket 1 shown in FIG. It is sectional drawing in the cross section orthogonal to a direction.
  • the gasket 1 is used for a vehicle, a general-purpose industrial machine, etc., and is used for sealing between two members by being pinched between two members and elastically deforming. For example, in an engine or the like, the gasket 1 is sandwiched between two members forming the casing to seal the casing. 1 and 2 show the gasket 1 in a free state in which no pressure is applied between the members.
  • the gasket 1 As shown in FIGS. 1 and 2, the gasket 1 according to the present embodiment has an annular flat plate shape, more specifically, an annular flat plate shape, and two members are fastened together.
  • a bolt hole 30 is formed as a through hole into which a bolt for sandwiching the gasket 1 between the members is inserted.
  • the gasket 1 includes a metal metal substrate 10 and a film-like coating layer 20 formed of an elastic body that covers at least a part of the metal substrate 10.
  • the metal substrate 10 includes an annular base portion 11, an inner peripheral portion 12 that extends from an inner peripheral edge 11 a that is an inner peripheral edge of the base portion 11, and an outer peripheral portion 13 that extends from an outer peripheral edge 11 b that is an outer peripheral edge of the base portion 11. have.
  • the base 11 has a flat plate shape or a planar shape, and has an upper surface 14 and a lower surface 15 that are surfaces facing each other and spread between the inner peripheral edge 11 a and the outer peripheral edge 11 b of the base 11.
  • the inner peripheral portion 12 extends obliquely from the inner peripheral edge 11 a of the base portion 11 toward the side of the base portion 11 facing the lower surface 15, and the outer peripheral portion 13 of the base portion 11 faces the side of the base portion 11 facing the lower surface 15. It extends diagonally from the outer peripheral edge 11b.
  • the inner peripheral side is the closed space side (inner side) surrounded by the annular gasket 1 as shown in FIG. 2, and the outer peripheral side is the inner side as shown in FIG. It is the external side on the opposite side.
  • the upper side in FIG. 2 is the upper side
  • the lower side is the lower side.
  • the metal substrate 10 has a uniform or substantially uniform thickness, and is formed from an elastic metal plate.
  • the metal substrate 10 may be formed from a single metal plate having elasticity, or may be formed by laminating a plurality of metal plates having elasticity.
  • As the metal material of the metal substrate 10 stainless steel, cold rolled steel, galvanized steel, aluminum alloy or the like is used.
  • the base part 11, the inner peripheral part 12, and the outer peripheral part 13 are formed by processing a metal plate by press working or forging, and are integrally formed from the same metal material.
  • the base 11 is a portion where the flat plate extends in an endless shape in an annular shape.
  • the inner peripheral edge 11a and the outer peripheral edge 11b of the base 11 extend smoothly, and in this embodiment, a circle is drawn. However, as shown in FIG. 1, the outer peripheral edge 11 b smoothly spreads along the bolt hole 30 on the outer peripheral side in the vicinity of the portion where the bolt hole 30 is formed.
  • an upper surface 14 and a lower surface 15, which are planes facing each other spread.
  • the upper surface 14 is an upper surface in FIG. 2, and the lower surface 15 is a lower surface in FIG.
  • the thickness (the width between the upper surface 14 and the lower surface 15) in the cross section of the base 11 is uniform or substantially uniform.
  • the inner peripheral portion 12 is a portion extending obliquely from the inner peripheral edge 11 a of the base portion 11 toward the side (lower side) where the lower surface 15 of the base portion 11 faces. It is bent from the inner peripheral edge 11a.
  • the inner peripheral portion 12 has an upper surface 16 that is a surface that continues to the upper surface 14 of the base portion 11 and a lower surface 17 that is a surface that continues to the lower surface 15 of the base portion 11, and as described above, the cross section of the inner peripheral portion 12.
  • the thickness (the width between the upper surface 16 and the lower surface 17) is uniform or substantially uniform.
  • the inner peripheral portion 12 (the upper surface 16 and the lower surface 17) is reduced in diameter toward the side facing the lower surface 15 of the base 11, more specifically, the normal direction of the lower surface 15 of the base 11 (see FIG. (In the direction of arrow z of 2), the diameter is reduced toward the lower side.
  • the inner peripheral portion 12 has the annular smooth upper surface 16 and lower surface 17, and is curved or linear in a cross section along the line AA (hereinafter also simply referred to as a cross section). It extends.
  • the inner peripheral portion 12 has a conical cylindrical shape.
  • the inner peripheral portion 12 may have another smooth annular shape such as a trumpet shape.
  • the inner peripheral portion 12 is bent obliquely with respect to the base portion 11 by a predetermined angle.
  • the height of the inner peripheral portion 12 is a height h1
  • the width of the inner peripheral portion 12 is a width w1
  • the lower surface 17 of the inner peripheral portion 12 extends obliquely by an angle ⁇ 1 with respect to the lower surface 15 of the base portion 11. As shown in FIG.
  • the height h ⁇ b> 1 is the portion of the inner peripheral portion 12 farthest from the lower surface 15 of the base 11 in the normal direction z of the lower surface 15 to the lower side in the normal direction, that is, the inner peripheral portion.
  • 12 is an interval between an inner peripheral end 17 a that is an end on the inner peripheral side of the lower surface 17 of 12 and the lower surface 15 of the base 11.
  • the width w1 is a distance between the outer peripheral end 17b and the inner peripheral end 17a, which is the outer peripheral end of the lower surface 17 of the inner peripheral portion 12, in the width direction (arrow x direction in FIG. 2) of the cross section of the base 11. It is.
  • the height h1 and the width w1 may be set between the upper surfaces 14 and 16 in the same manner as described above.
  • the outer peripheral portion 13 is a portion extending obliquely from the outer peripheral edge 11 b of the base portion 11 toward the side (lower side) where the lower surface 15 of the base portion 11 faces, and the metal plate is outside the base portion 11. It is bent from the peripheral edge 11b.
  • the outer peripheral portion 13 has an upper surface 18 that is a surface continuing from the upper surface 14 of the base portion 11 and a lower surface 19 that is a surface continuing from the lower surface 15 of the base portion 11, and as described above, the thickness in the cross section of the outer peripheral portion 13.
  • the height (the width between the upper surface 18 and the lower surface 19) is uniform or substantially uniform.
  • the outer peripheral portion 13 (the upper surface 18 and the lower surface 19) increases in diameter toward the side of the base 11 facing the lower surface 15, and more specifically, the normal direction of the lower surface 15 of the base 11 (FIG. 2). (In the direction of arrow z), the diameter is increased toward the lower side.
  • the outer peripheral part 13 has the cyclic
  • the outer peripheral portion 13 has a conical cylindrical shape.
  • the outer peripheral portion 13 may have another smooth annular shape such as a trumpet shape.
  • the outer peripheral portion 13 is bent obliquely at a predetermined angle with respect to the base portion 11 in the cross section.
  • the height of the outer peripheral portion 13 is a height h2
  • the width of the outer peripheral portion 13 is a width w2
  • the lower surface 19 of the outer peripheral portion 13 extends obliquely by an angle ⁇ 2 with respect to the lower surface 15 of the base portion 11.
  • the height h ⁇ b> 2 is a portion of the outer peripheral portion 13 farthest away from the lower surface 15 of the base 11 in the normal direction of the lower surface 15 (in the direction of arrow z in FIG. 2).
  • the width w2 is the distance between the inner peripheral end 19b and the outer peripheral end 19a, which is the inner peripheral end of the lower surface 19 of the outer peripheral portion 13, in the width direction of the cross section of the base portion 11 (the arrow x direction in FIG. 2). It is.
  • the height h2 and the width w2 may be set between the upper surfaces 14 and 18 in the same manner as described above.
  • the outer peripheral portion 13 may be formed over the entire periphery of the outer peripheral edge 11 b of the base portion 11, or may be partially formed on a part of the outer peripheral edge 11 b of the base portion 11.
  • the outer peripheral portion 13 may extend in an arc shape along the outer peripheral edge 11 b of the base portion 11, and a plurality of outer peripheral portions 13 may be formed at equal angular intervals on the outer peripheral edge 11 b of the base portion 11. .
  • the coating layer 20 covers the metal substrate 10 from the side of the upper surface 14 and the lower surface 15 of the base portion 11 as shown in FIG. That is, the covering layer 20 integrally covers the upper surfaces 14, 16, and 18 of the base portion 11, the inner peripheral portion 12, and the outer peripheral portion 13, and the base portion 11, the inner peripheral portion 12, and the lower surface 15 of the outer peripheral portion 13. , 17 and 19 are integrally covered.
  • the covering layer 20 does not cover the inner peripheral edge 17 c that is the inner peripheral edge of the inner peripheral portion 12 and the outer peripheral edge 19 c that is the outer peripheral edge of the outer peripheral portion 13.
  • the covering layer 20 may cover part or all of the inner peripheral edge 17c of the inner peripheral portion 12, and the covering layer 20 covers part or all of the outer peripheral edge 19c of the outer peripheral portion 13. It may be.
  • the elastic body forming the coating layer 20 includes an elastic body made of synthetic rubber.
  • the synthetic rubber is a synthetic rubber including at least one of nitrile rubber (NBR), styrene butadiene rubber (SBR), fluorine rubber (FKM), acrylic rubber (ACM), and silicon rubber.
  • NBR nitrile rubber
  • SBR styrene butadiene rubber
  • FKM fluorine rubber
  • ACM acrylic rubber
  • silicon rubber silicon rubber.
  • the covering layer 20 has a uniform or substantially uniform thickness in cross section, is formed in a film shape or a sheet shape, and is attached to the metal substrate 10.
  • the elastic body of the covering layer 20 may be a foam rubber.
  • the covering layer 20 is attached to the metal substrate 10 with an adhesive, for example. Between the metal substrate 10 and the adhesive layer, a base treatment layer formed by subjecting the surface of the metal substrate 10 to a base treatment may be formed.
  • An example of the base treatment is zinc phosphate treatment.
  • the periphery of the portion where the bolt hole 30 is formed is wider than the other portion, and the bolt hole 30 is formed in the base portion 11. .
  • FIG. 3 is a cross-sectional view showing a state of the gasket 1 in the attached state.
  • the gasket 1 is sandwiched between the two members 70 and 71, is sandwiched between the members 70 and 71, is elastically deformed, and seals between the members 70 and 71.
  • the member 70 and the member 71 are fastened with the flat surface 70a formed on the member 70 and the flat surface 71a formed on the member 71 facing each other, and the gasket 1 is interposed between the flat surface 70a and the flat surface 71a. Is pinched and elastic-plastically deformed.
  • the members 70 and 71 are, for example, members that form a cylinder block and a cylinder head of an engine, a cylinder block and an oil pan, a case of a fuel cell stack, a casing of other devices, and the planes 70a and 71a are, for example, It is formed in the flange part formed in the members 70 and 71.
  • the gasket 1 is elastically deformed from the free state shown in FIG. 2 in the fastening process of the members 70 and 71, and the fastening operation is continued until a desired contact pressure is generated at the contact portion (seal line) with the members 70 and 71. Done.
  • the fastening is performed, for example, by screwing a bolt.
  • the members 70 and 71 are fastened, and the upper surface 14 of the base 11 comes into contact (surface contact) with the flat surface 70a of the member 70 through the coating layer 20 and is pressed downward (in the direction of arrow z1 in FIG. 3) to An inner peripheral end 17a which is an end portion on the inner peripheral side of the lower surface 17 of the portion 12 and the vicinity thereof (hereinafter referred to as an inner peripheral end portion 17d) are brought into contact with the flat surface 71a of the member 71 through the coating layer 20 and above ( The member 71 is pressed in the direction of the arrow z2 in FIG. And is pressed upward (in the direction of arrow z2 in FIG. 3).
  • the metal substrate 10 is elastically deformed, the inner peripheral portion 12 is bent upward with respect to the base portion 11, and the angle ⁇ 1 is decreased.
  • the outer peripheral portion 13 is upward with respect to the base portion 11. And the angle ⁇ 2 decreases, and the height h1 of the inner peripheral portion 12 and the height h2 of the outer peripheral portion 13 decrease.
  • the interval between the plane 70a and the plane 71a is further narrowed, and when the interval between the plane 70a and the plane 71a becomes a certain interval, the inner circumference
  • the reaction force with respect to the base 11 generated by the bending deformation of the part 12 and the outer peripheral part 13 exceeds a predetermined value, and as shown in FIG. 3, the base 11 is warped so as to protrude downward.
  • the surface contact of the base portion 11 is eliminated, and the metal substrate 10 is on the upper side, a portion in the vicinity of the connection portion (the inner peripheral edge 11a) between the base portion 11 and the inner peripheral portion 12 (hereinafter referred to as the inner peripheral upper contact portion 10a).
  • a portion in the vicinity of the connecting portion (outer peripheral edge 11b) of the base portion 11 and the outer peripheral portion 13 is in contact with the flat surface 70a of the member 70 via the covering layer 20, 11 is in contact with the flat surface 71a of the member 71 through the coating layer 20 in the central portion of the lower surface 15 and in the vicinity thereof (hereinafter referred to as the lower surface central contact portion 15a).
  • the inner peripheral portion 12 continues to contact the flat surface 71a of the member 71 via the coating layer 20 at the inner peripheral end portion 17d, and the outer peripheral portion 13 similarly similarly at the outer peripheral end portion 19d. It continues to contact the flat surface 71a of the member 71 via Thus, five seal lines are formed between the gasket 1 and the members 70 and 71.
  • the inner peripheral end portion 17d of the inner peripheral portion 12 presses the coating layer 20 against the flat surface 71a of the member 71 with a pressure of a desired magnitude so as to be in close contact with the flat surface 71a.
  • a desired surface pressure is generated in the seal line s1 having a desired width formed in the contact portion.
  • the inner peripheral upper side contact portion 10a presses the coating layer 20 against the flat surface 70a of the member 70 with a desired pressure to bring it into close contact with the flat surface 70a, and a seal line s2 having a desired width formed on this contact portion A surface pressure of a desired magnitude is generated.
  • the lower surface center contact portion 15a of the base portion 11 presses the coating layer 20 against the flat surface 71a of the member 71 with a pressure of a desired size to bring it into close contact with the flat surface 71a, and has a desired width formed at this contact portion.
  • a desired surface pressure is generated in the seal line s3.
  • the outer peripheral upper contact portion 10b presses the coating layer 20 against the flat surface 70a of the member 70 with a desired pressure to bring it into close contact with the flat surface 70a, and the desired seal line s4 formed at this contact portion has a desired width. The surface pressure of the size of is generated.
  • the outer peripheral end portion 19d of the outer peripheral portion 13 presses the coating layer 20 against the flat surface 71a of the member 71 with a desired pressure so as to be in close contact with the flat surface 71a, and has a desired width formed at the contact portion.
  • a desired surface pressure is generated in the seal line s5.
  • the gasket 1 forms two seal lines s2 and s4 in the inner peripheral upper contact portion 10a and the outer peripheral upper contact portion 10b of the metal substrate 10 between the upper member 70 in the mounted state.
  • three seal lines s1 at the inner peripheral end portion 17d of the inner peripheral portion 12, the lower surface center contact portion 15a of the base portion 11, and the outer peripheral end portion 19d of the outer peripheral portion 13 are provided between the lower member 71 and the lower member 71. , S3, s5.
  • the gasket 1 in the mounted state, the gasket 1 generates a desired surface pressure with respect to the flat surfaces 70a and 71a in each of the seal lines s1 to s5, and the sealing between the flat surfaces 70a and 71a is appropriately achieved. Yes.
  • the gasket 1 seals between the flat surface 70a and the flat surface 71a in the attached state, and an object inside the members 70 and 71, for example, lubricating oil or the like through the gap between the flat surfaces 70 and 71 from the inner peripheral side. Is prevented from leaking out, and external salt water, snow melting agent, dust and the like are prevented from entering through the gap between the flat surfaces 70 and 71 from the outer peripheral side.
  • the width in the circumferential direction (x direction in FIG. 2) of the seal line s3 corresponding to the lower surface center contact portion 15a of the base portion 11 increases as the fastening force of the members 70 and 71 increases, Is larger than the circumferential width of the other seal lines. Further, the reaction force received from the flat surface 71 a by the lower surface center contact portion 15 a of the base portion 11 acts on the inner peripheral end portion 17 d of the inner peripheral portion 12 and the outer peripheral end portion 19 d of the outer peripheral portion 13.
  • the reaction force from the base 11 due to its own bending deformation is also applied to the outer peripheral end 17d and the outer peripheral end 19d of the outer peripheral portion 13.
  • the seal line s1, s2, s4, and s5 on the outer peripheral side and inner peripheral side of the gasket 1 can provide high sealing performance.
  • the gap between the member 70 and the member 71 is closed at the end portion on the outer peripheral side, and the outer peripheral portion 13 is It is greatly bent and deformed (compressed) at the outer peripheral end of the gap between the member 70 and the member 71 and extends obliquely from the plane 71a toward the plane 70a, and the gap between the member 70 and the member 71 is increased. It is blocked in a wide area. As a result, the gap between the member 70 and the member 71 can be closed at the end on the outer peripheral side, and the space communicating with the outside of the gap can be reduced.
  • the gasket 1 can aim at suppression of the corrosion by the salt water etc. of the members 70 and 71 which clamp the gasket 1.
  • the gasket 1 is suitable when the members 70 and 71 are made of an aluminum alloy such as ADC 12 that is easily corroded by salt water or the like.
  • the gasket 1 can reduce the area where the member 71 is exposed to the space communicating with the outside on the outer peripheral side of the gap between the member 70 and the member 71 by the outer peripheral portion 13. For this reason, in particular, when the member 71 located on the side in which the outer peripheral portion 13 extends (the lower side in the present embodiment) is an aluminum alloy such as ADC 12 that is easily corroded by salt water or the like, the gasket 1 Corrosion due to salt water or the like can be suppressed.
  • the gasket 1 since the gasket 1 is in an attached state when the inner peripheral portion 12 and the outer peripheral portion 13 are bent, the fastening force of the members 70 and 71 for making the gasket 1 in the attached state is smaller than that of the conventional gasket. For this reason, the gasket 1 can reduce the fastening force that fastens the members 70 and 71 that sandwich the gasket 1.
  • the member 70 which clamps the gasket 1 is reduced, reducing the fastening force which fastens a pair of members 70 and 71 which clamps the gasket 1. It is possible to suppress corrosion caused by 71 salt water or the like.
  • the gasket 1 it is possible to form the five seal lines s1 to s5 in the mounted state only by having the two inner peripheral portions 12 and the outer peripheral portion 13 which are bent portions, and it is effective with a simple shape. In particular, the gap can be sealed.
  • the inner peripheral end portion 17d of the inner peripheral portion 12 and the outer peripheral end portion 19d of the outer peripheral portion 13 are counteracted from the base portion 11 based on the bending deformation of the members 70 and 71 by the clamping force.
  • a reaction force from the flat surface 71a of the lower surface center contact portion 15a that contacts the flat surface 71a due to the warp of the base portion 11 also acts, and in the seal line s5 on the outer peripheral side and the seal line s1 on the inner peripheral side of the gasket 1 High sealing performance can be obtained.
  • the surface pressure with respect to the plane 70a in the inner periphery upper side contact part 10a and the outer periphery upper side contact part 10b of the metal substrate 10 can also be enlarged.
  • the gasket 1 has high sealing performance.
  • the gasket 2 according to the second embodiment of the present invention is different from the gasket 1 according to the first embodiment of the present invention described above in the shape around the bolt hole 30.
  • the same or similar components to the gasket 1 according to the first embodiment of the present invention described above will be denoted by the same reference numerals, the description thereof will be omitted, and different configurations will be described.
  • FIG. 4 is a plan view for showing a schematic structure of the gasket 2
  • FIG. 5 is a cross-sectional view of the gasket 2 shown in FIG. 4, taken along line AA
  • FIG. 6 is shown in
  • FIG. 7 is a cross-sectional view of the gasket 2 taken along line BB
  • FIG. 7 is a cross-sectional view of the gasket 2 shown in FIG. 4 taken along line CC.
  • the gasket 2 has a rectangular annular flat plate shape, and a plurality of bolt holes 30 are formed in the same manner as the gasket 1.
  • line AA is a line that is orthogonal to the extending direction of base 11 (see the direction of arrow y in FIG.
  • line CC is one bolt hole 30.
  • line BB is between the line AA and the line CC and in the vicinity of the bolt hole 30. It is a line orthogonal to the extending direction of the base 11.
  • the gasket 2 has a metal substrate 40 that is different from the metal substrate 10 in the gasket 1 described above. Specifically, the metal substrate 40 has an outer peripheral portion 41 that is different from the outer peripheral portion 13 of the metal substrate 10. ing.
  • the gasket 2 has the same cross-sectional shape as the gasket 1 between the bolt holes 30 adjacent to each other.
  • the gasket 2 in the cross section passing through the bolt hole 30, the gasket 2 has a cross sectional shape different from that of the gasket 1, and the metal substrate 40 has no outer peripheral portion 41.
  • the outer peripheral edge 11 b of the base 11 forms an outer peripheral edge.
  • the covering layer 20 does not cover the outer peripheral edge 11 b of the base portion 11, but may cover a part or all of it.
  • the cross-sectional shape of the gasket 2 smoothly transitions from the cross-sectional shape at the bolt hole 30 shown in FIG. 5 to the cross-sectional shape at a site away from the bolt hole 30 shown in FIG.
  • the outer peripheral portion 41 is directed from a portion having a cross-sectional shape (hereinafter referred to as a bolt hole shape) shown in FIG. 5 to a portion having a cross-sectional shape (hereinafter referred to as a basic shape) shown in FIG.
  • a bolt hole shape a portion having a cross-sectional shape shown in FIG. 5
  • a portion having a cross-sectional shape hereinafter referred to as a basic shape
  • the gasket 2 has a bolt hole shape (FIG. 5) at the site of the bolt hole 30 in the extending direction of the base 11, and the basic shape (FIG. 7) from a position spaced apart from the bolt hole shape site. ) And has a gradually deformed shape (see FIG. 6) in the region between them.
  • the outer peripheral part 41 is not formed in the periphery of the bolt hole 30, the loss of the fastening force (bolt axial force) by the bolt can be reduced in the mounted state, and the reduction of the fastening force of the gasket 2 is suppressed. can do. For this reason, in the mounted state, the compressibility (degree of bending deformation) of the outer peripheral portion 41 and the inner peripheral portion 12 can be increased, and the surface pressure generated in the seal line can be increased for a certain axial force. The sealing performance of the gasket 2 can be enhanced.
  • the gasket 2 has a gradually deformed region range and a gradually deformed shape so that a desired surface pressure is generated in each seal line by a fastening force generated in each region based on bolt fastening.
  • the gasket 2 having the above-described configuration also acts in the same manner as the gasket 1 according to the first embodiment of the present invention, and can provide the same effects.
  • the member 70 which clamps the gasket 2
  • the fastening force to fasten the pair of members 70, 71 that clamp the gasket 2 It is possible to suppress corrosion caused by 71 salt water or the like.
  • the part having the bolt hole part shape is not limited to the part of the bolt hole in the extending direction of the base part 11 described above.
  • the gasket 2 may have a bolt hole shape up to the periphery of the bolt hole 30, for example, a portion of a seating surface of a fastening bolt (not shown). You may have.
  • the gasket 2 does not have to have a bolt hole portion shape in the entire portion of the bolt hole 30 in the extending direction of the base portion 11, for example, a bolt near the center of the bolt hole 30 or only at the center of the bolt hole 30. You may have a hole shape.
  • the lower surface center contact portion 15a is formed on the base portion 11 without obtaining a reaction force due to elastic deformation of the outer peripheral portion 41 due to high surface pressure due to high rigidity of the bolt seat surface. It is only necessary to have the bolt hole shape within the range that can be achieved.
  • this invention is not limited to the gaskets 1 and 2 which concern on the said embodiment of the said invention, Everything included in the concept of this invention, and a claim Including embodiments.
  • the configurations may be appropriately combined as appropriate so as to achieve at least part of the problems and effects described above.
  • the shape, material, arrangement, size, and the like of each component in the above embodiment can be appropriately changed according to the specific usage mode of the present invention.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Gasket Seals (AREA)

Abstract

L'invention concerne un joint d'étanchéité avec lequel il est possible de réduire une force de serrage pour serrer une paire d'éléments destinés à maintenir par pression le joint d'étanchéité entre eux, tout en permettant de réduire au minimum la corrosion par l'eau salée ou similaire des éléments maintenant par pression le joint d'étanchéité. Un joint d'étanchéité (1) comporte un substrat métallique (10) constitué d'un métal, et une couche de revêtement membraneuse (20) formée d'une substance élastique revêtant le substrat métallique (10). Le substrat métallique (10) possède une partie de base (11), une partie périphérique interne (12) et une partie périphérique externe (13). La partie de base (11) est une partie où s'étend une plaque plate sous une forme annulaire et sans fin. La partie périphérique interne (12) est une partie s'étendant de manière inclinée à partir d'un bord périphérique interne (11a) de la partie de base (11) vers un côté tourné vers une surface inférieure (15) de la partie de base (11), et la partie périphérique externe (13) est une partie s'étendant de manière inclinée à partir d'un bord périphérique externe (11b) de la partie de base (11) en direction du côté tourné vers la surface inférieure (15) de la partie de base (11).
PCT/JP2017/014936 2016-04-25 2017-04-12 Joint d'étanchéité WO2017187978A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2018514254A JPWO2017187978A1 (ja) 2016-04-25 2017-04-12 ガスケット

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016-087233 2016-04-25
JP2016087233 2016-04-25

Publications (1)

Publication Number Publication Date
WO2017187978A1 true WO2017187978A1 (fr) 2017-11-02

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WO (1) WO2017187978A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020095665A1 (fr) 2018-11-05 2020-05-14 Nok株式会社 Joint et structure d'étanchéité

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59188351U (ja) * 1983-06-02 1984-12-13 日本メタルガスケツト株式会社 ガスケツト
JP2000297698A (ja) * 1999-04-16 2000-10-24 Nok Corp 金属ガスケット
JP2011047508A (ja) * 2009-08-28 2011-03-10 Nok Corp ガスケット
JP2013036607A (ja) * 2011-07-11 2013-02-21 Nok Corp 金属ガスケットによるシール構造

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59188351U (ja) * 1983-06-02 1984-12-13 日本メタルガスケツト株式会社 ガスケツト
JP2000297698A (ja) * 1999-04-16 2000-10-24 Nok Corp 金属ガスケット
JP2011047508A (ja) * 2009-08-28 2011-03-10 Nok Corp ガスケット
JP2013036607A (ja) * 2011-07-11 2013-02-21 Nok Corp 金属ガスケットによるシール構造

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2020095665A1 (fr) 2018-11-05 2020-05-14 Nok株式会社 Joint et structure d'étanchéité
EP3879142A4 (fr) * 2018-11-05 2022-08-10 NOK Corporation Joint et structure d'étanchéité
US11499635B2 (en) 2018-11-05 2022-11-15 Nok Corporation Gasket and sealing structure

Also Published As

Publication number Publication date
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