Sealing washer and mounting structure thereof

Abstract

The invention provides a sealing washer and a mounting structure thereof, wherein the sealing washer can enable fastening operation of a fixing piece to be smooth and has high sealing performance. A seal washer (10) is provided with: an annular core material (11); an outer seal part (13) made of an elastic material fixed to the outer peripheral end of the core material; and an inner sealing part (14) made of an elastic material fixedly connected to the inner peripheral side end of the core material, the core material is provided with a core material main body (11a) and a sealing base part (11b), the outer sealing part is configured in a manner that the surface facing the object part (1) of the two surfaces in the thickness direction of the sealing base part protrudes from the surface of the core material main body, and the inner sealing part is configured in a manner that the surface facing the object part (1) of the two surfaces in the thickness direction of the sealing base part protrudes from the surface of the core material main body. The outer seal portion protrudes further inward on an end face (14d) on the inner peripheral side of the core body and protrudes further toward the fastening portion (31) side than the surface of the core body, the inner diameter (r1) of the outer seal portion is larger than the diameter (r3) of the insertion hole (2), the diameter of the insertion hole is larger than the inner diameter (r4) of the core, and the outer diameter (r2) of the fastening portion is larger than the inner diameter of the core.

Description

Technical Field

[0001] The invention relates to a sealing gasket and a mounting structure thereof. Background Art

[0002] Conventional sealing gaskets include a ring-shaped core material, an outer sealing portion fixed to an outer peripheral end of the core material and made of an elastic material, and an inner sealing portion fixed to an inner peripheral end of the core material and made of an elastic material (for example, refer to Patent Document 1).

[0003] This sealing gasket is constructed such that an outer sealing portion seals between the sealing gasket and the object part by elastic contact with respect to the object part, and on the other hand, an inner sealing portion seals between the sealing gasket and the fastening portion by elastic contact with respect to the fastening portion of the fixing part (an annular gasket in Patent Document 1), thereby preventing moisture from penetrating into the insertion hole of the object part.

[0004] Prior art literature

[0005] Patent Literature

[0006] Patent Document 1: WO2014 / 080511 Summary of the invention

[0007] Technical problem to be solved by the invention

[0008] However, in the above-mentioned literature technology, during the fixing operation of the target part using the fixing piece, if a rotation operation is performed to cause elastic contact of the outer sealing portion with respect to the target part and elastic contact of the inner sealing portion with respect to the fastening portion, the sealing gasket is in a state where the pressing force generated by the elastic contact acts on the target part and the fixing piece respectively, and the subsequent rotation operation of the fixing piece becomes difficult to perform.

[0009] The present invention has been made to solve such a problem, and an object of the present invention is to provide a sealing gasket having high sealing performance and a mounting structure thereof that can facilitate the fastening operation of a fixing member.

[0010] Solutions for solving the above technical problems

[0011] In order to achieve the above-mentioned purpose, the sealing gasket of the present invention is arranged between the fastening part of a fixing part having a fastening part and a shaft part and an object part having an insertion hole for the shaft part to be inserted, and is characterized in that the sealing gasket comprises: an annular core material; an outer sealing part, which is composed of an elastic material fixedly connected to the end part on the outer peripheral side of the core material; an inner sealing part, which is composed of an elastic material fixedly connected to the end part on the inner peripheral side of the core material, the core material comprises a core material body and a sealing base extending from the core material body to the outer peripheral side, and the outer sealing part It is configured that, among the two surfaces in the thickness direction of the sealing base, the surface facing the object part protrudes further than the surface of the core material body, the inner sealing portion is configured so that the end surface on the inner circumferential side of the core material body further protrudes inwardly and protrudes further toward the fastening portion than the surface of the core material body, the inner diameter of the outer sealing portion is set to be larger than the diameter of the insertion hole, the diameter of the insertion hole is set to be larger than the inner diameter of the core material, and the outer diameter of the fastening portion is set to be larger than the inner diameter of the core material.

[0012] In addition, the sealing gasket installation structure of the present invention is a sealing gasket installation structure arranged between a fastening portion of a fixing member having a fastening portion and a shaft portion and an object component having an insertion hole for inserting the shaft portion, and is characterized in that the sealing gasket of the present invention is used in the sealing gasket installation structure.

[0013] The sealing gasket and the sealing gasket mounting structure of the present invention may further include two or more configurations selectable in combination from the following configurations (1) to (3).

[0014] Configuration (1): It also has a snap-fitting piece that protrudes inward from the end surface of the inner circumferential side of the inner sealing portion, and the snap-fitting piece is a plate-like piece thinner than the inner sealing portion, and the front end snaps into the circumferential surface of the shaft portion at least when the inner sealing portion is not elastically deformed.

[0015] Configuration (2): The engaging pieces are formed intermittently along the circumferential direction.

[0016] Configuration (3): A thread groove is formed in the shaft portion, and the front end of the engaging piece can be engaged with the thread groove.

[0017] Effects of the Invention

[0018] Since the sealing gasket and the mounting structure thereof of the present invention are of the above-mentioned structure, when the target component is mounted using the fixing tool, the sealing performance can be improved and the fastening operation of the fixing tool can be smoothly performed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 11 and 10. The drawings are explanatory diagrams of a sealing gasket according to an embodiment of the present invention, wherein (a) is a top view of the sealing gasket, (b) is a longitudinal sectional view of the sealing gasket taken along line AA, and (c) is a longitudinal sectional view of the sealing gasket taken along line A′-A′.

[0020] Figure 2 The diagram is a cut-away end view and a partially enlarged view showing how the sealing gasket is used (time series, 1 / 2).

[0021] Figure 3 The diagram is a cutaway end view and a partial enlarged view showing how the sealing gasket is used (time series, 2 / 2).

[0022] Figure 4 (a) and (b) are cut-away end views showing how the sealing gasket according to other embodiments is used.

[0023] Figure 5 (a) to (e) are end views of a cut portion of a sealing gasket according to still another embodiment.

[0024] Figure 6 1 and 10 are explanatory diagrams of a sealing gasket according to another embodiment, wherein (a) is a plan view of the sealing gasket, and (b) is a longitudinal sectional view of the sealing gasket taken along line BB. DETAILED DESCRIPTION

[0025] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. Figure 1 to Figure 6 The sealing gaskets 10 and 10A to 10G of the illustrated embodiments have the same basic structure.

[0026] The sealing gaskets 10 and 10A to 10G are arranged between the fastening portion 31 of the fixing tool 30 having the fastening portion 31 and the shaft portion 32 and the counterpart component 1 having the insertion hole 2 through which the shaft portion 32 is inserted.

[0027] The sealing gaskets 10, 10A to 10G include: an annular core material 11; an outer sealing portion 13 composed of an elastic material fixed to the end portion on the outer peripheral side of the core material 11; and an inner sealing portion 14 composed of an elastic material fixed to the end portion on the inner peripheral side of the core material 11. The core material 11 includes a core material body 11a and a sealing base 11b extending from the core material body 11a toward the outer peripheral side.

[0028] The outer sealing portion 13 is configured such that the surface facing the target component 1 of the two surfaces in the thickness direction of the sealing base 11b protrudes further than the surface (target side surface) 11ab of the core material body 11a, and the inner sealing portion 14 is configured such that the end surface 14d on the inner peripheral side of the core material body 11a further protrudes inward and protrudes further toward the fastening portion 31 than the surface (fixing side surface) 11aa of the core material body 11a. The inner diameter r1 of the outer sealing portion 13 is set to be larger than the diameter r3 of the insertion hole 2, the diameter r3 of the insertion hole 2 is set to be larger than the inner diameter r4 of the core material 11, and the outer diameter r2 of the fastening portion 31 is set to be larger than the inner diameter r4 of the core material 11.

[0029] Next, refer to Figure 1 to Figure 3 right Figure 1 A sealing gasket 10 and a mounting structure thereof according to an embodiment shown will be described. Figure 1 (a) is a top view of the sealing gasket 10, Figure 1 (b) is a longitudinal cross-sectional view of the sealing gasket 10 in the direction of the arrow line AA. Figure 1 (c) is a longitudinal sectional view of the sealing gasket 10 taken along the line A′-A′ in the direction of the arrow. Figure 2 and Figure 3 1 is a diagram showing the mounting structure of the sealing gasket 10. Figure 2 It is a cut-off end view and a partial enlarged view showing the use of the sealing gasket 10 (time series, 1 / 2), Figure 3 It is a cut-away end view and a partial enlarged view showing the usage of the sealing gasket 10 (time series, 2 / 2).

[0030] Hereinafter, the sealing gasket 10 will be described by referring to the fastening portion 31 side of the fixing member 30 of the sealing gasket 10 as the "fixing side" and the counterpart component 1 side of the sealing gasket 10 as the "subject side". Figures 4 to 6 The same applies to the illustrated sealing gaskets 10A to 10G.

[0031] Figure 1 The sealing gasket 10 is as follows Figure 1 As shown in (a), the ring-shaped body is integrally provided with a ring-shaped core material 11 made of metal, an elastic sealing portion 12 made of elastic material, and a snap-fit ​​piece 15 made of elastic material. As the material of the core material 11, in addition to metal materials such as iron, copper, and aluminum, hard synthetic resin materials can also be cited. As the elastic material, rubber and elastic soft synthetic resin can be cited.

[0032] The core material 11 includes a core material body 11a and a sealing base 11b provided on the outer peripheral side of the core material body 11a. The core material body 11a is set to have a substantially uniform thickness and is set to be substantially rectangular in cross-section. The sealing base 11b is an annular plate having a thickness of about 1 / 3 of the core material body 11a, and is formed to extend outward from the approximate center in the thickness direction of the outer peripheral end of the core material body 11a to be substantially parallel to the core material body 11a.

[0033] The elastic sealing portion 12 includes an outer sealing portion 13 disposed on the outer periphery of the sealing gasket 10 and an inner sealing portion 14 disposed on the inner periphery of the sealing gasket 10. A snap-fitting piece 15 is provided on the end face 14d on the inner periphery of the inner sealing portion 14. The snap-fitting piece 15 is composed of an annular plate-like piece protruding inwardly from the approximate center in the thickness direction of the end face 14d and approximately parallel to the core material body 11a. In addition, in this example, the snap-fitting piece 15 is formed integrally with the elastic material of the same raw material as the elastic sealing portion 12.

[0034] The engaging piece 15 can be any component that is arranged in a manner that penetrates the space (circular opening 18) inside the engaging piece 15 during use of the sealing gasket 10 and engages with the shaft 32 of the fixing member (bolt) 30. That is, the engaging piece 15 can be used to hold the shaft 32 and temporarily fix the sealing gasket 10 / bolt 30 to each other by gently pressing the shaft 32 from the periphery, or by the front end 15a of the engaging piece 15 entering the thread groove 33a of the external thread 33, or by the front end 15a of the engaging piece 15 hooking on the thread teeth 33b of the external thread 33. In addition, Figure 1 The engaging piece 15 of the example is formed into a substantially semicircular shape in order to make it easier for the front end 15a to enter the screw groove 33a.

[0035] Therefore, the diameter of the opening 18 surrounded by the engagement piece 15 is substantially the same as the diameter of the shaft 32 of the bolt 30 to which the sealing gasket 10 is mounted, or is slightly smaller than the diameter of the shaft 32. In addition, the engagement of the engagement piece 15 may also be an engagement with the neck 34 (non-threaded portion) of the shaft 32.

[0036] The engaging piece 15 only needs to engage the front end 15a with the peripheral surface of the shaft portion 32 of the bolt 30 before at least the elastic deformation of the inner sealing portion 14 occurs during the fixing operation of the target component 1. In addition, the engagement between (the engaging piece 15 of) the sealing gasket 10 and (the shaft portion 32 of) the bolt 30 may be released during the process of fixing the target component 1 to the mounting component 20 by the bolt 30 as described later.

[0037] In short, the engaging piece 15 only needs to be able to temporarily integrate the bolt 30 and the sealing gasket 10 at least in the pre-stage of the fixing operation of the target component 1 relative to the mounting component 20. That is, according to the temporary integration, the two components of a set consisting of the bolt 30 and the sealing gasket 10 can be handled as a whole in a temporarily integrated state, and as a result, the two components can be prevented from being separated and one of the components can be lost during the storage or transportation of the two components before the operation.

[0038] In the present example, the core material 11 , the outer sealing portion 13 , the inner sealing portion 14 and the engaging piece 15 of the sealing gasket 10 are symmetrical in shape on the front and back sides, and the sealing gasket 10 as a whole is also symmetrical in shape on the front and back sides.

[0039] The outer sealing portion 13 is fixed to the two surfaces (the surface on the fixing side and the surface on the object side) of the sealing base 11b in the thickness direction in a separated state. Figure 1 As shown in (b) and (c), the outer seal (fixing side) 13a protrudes further than the fixing side surface 11aa of the core body 11a, and the outer seal (matching side) 13b protrudes further than the matching side surface 11ab of the core body 11a.

[0040] In addition, the inner sealing portion 14 includes an inner sealing body 14a, and has a fixed side convex portion 14b on the fixed side of the inner sealing body 14a that protrudes more than the fixed side surface 11aa of the core material body 11a, and has an object side convex portion 14c on the object side of the inner sealing body 14a that protrudes more than the object side surface 11ab of the core material body 11a.

[0041] In addition, the outer seal portion 13 and the inner seal portion 14 protrude in the thickness direction. In the example shown in the figure, the inner seal portion 14 protrudes slightly more than the outer seal portion 13, but the present invention is not limited thereto.

[0042] The sealing gasket 10 can be made by forming the core material 11, the elastic sealing part 12 and the engaging piece 15 in one piece by two-color molding of an injection molding mold, but the elastic sealing part 12 and the engaging piece 15 formed separately can also be installed on the core material 11. In addition, since the sealing gasket 10 of this example is based on two-color molding, the inner sealing part 14 and the outer sealing part 13 are connected by the connecting part 12a that appears on the surface and the back (refer to Figure 1 (a)(c)).

[0043] like Figure 2 As shown, the bolt 30 and the seal washer 10 are used to fix a plate-shaped target component 1 having an insertion hole 2 through which a shaft portion 32 of the bolt 30 is inserted, to a mounting component 20 having a female thread portion (embedded nut portion) 21 .

[0044] That is, the external thread portion 33 (see Figure 2 The target component 1 is fixed by being sandwiched between the fastening portion (bolt head) 31 of the bolt 30 and the mounting component 20. The sealing gasket 10 is used in a manner arranged between the back side of the bolt head 31 and the surface of the target component 1.

[0045] Figure 2 The figure shows a state in which the external thread portion 33 of the bolt 30 and the internal thread portion 21 of the mounting member 20 are threadedly engaged, and the sealing gasket 10 is sandwiched between the bolt head 31 and the counterpart member 1 , which is a state in the middle of the fixing operation. Figure 3 It is shown from Figure 2 FIG. 2 is a diagram of a state in which the bolt 30 is screwed in and the target component 1 is fixed to the mounting component 20.

[0046] In the mounting structure of the sealing gasket 10, the dimensional relationship between the sealing gasket 10, the counterpart component 1 and the bolt 30 is given by the following relational expressions. In addition, the diameter, inner diameter and outer diameter in each relational expression are all radii, that is, the dimensions from the central axis L (refer to Figure 2 ).

[0047] The inner diameter r1 of the outer seal portion 13>the outer diameter r2 of the bolt head 31

[0048] The inner diameter r1 of the outer seal portion 13>the diameter r3 of the insertion hole 2 of the counterpart component 1

[0049] The diameter r3 of the insertion hole 2 of the target component 1>the inner diameter r4 of the core material 11 (the outer diameter of the inner sealing portion 14)

[0050] The outer diameter r2 of the bolt head 31>the inner diameter r4 of the core material 11

[0051] In addition, the relationship between the outer diameter r2 of the bolt head 31 and the diameter r3 of the insertion hole 2 is not determined, but in the example of the figure, r2>r3.

[0052] The above relationship shows that: the outer sealing portion 13 is not opposite to the bolt head 31 on the surface side (that is, the surface side of the outer sealing portion 13 is a space), the outer sealing portion 13 is opposite to the surface of the target component 1 on the back side, the inner sealing portion 14 is opposite to the back side of the bolt head 31 on the surface side, and the inner sealing portion 14 is opposite to the space formed by the insertion hole 2 on the back side.

[0053] In the case where the bolt 30 and the mounting member 20 are screwed together, Figure 2In the state, the outer seal (target side) 13b of the outer seal portion 13 contacts the surface 1a of the target component 1, and the fixing side convex portion 14b of the inner seal portion 14 contacts the back side of the bolt head 31. And, by further screwing, all the components are fixed to each other and cannot be screwed in any further. Figure 3 status.

[0054] exist Figure 3 In the state, the outer seal (target side) 13b of the outer seal portion 13 elastically contacts the surface 1a of the target component 1 and is compressed. Figure 2 There is no change in shape compared to the state.

[0055] In this elastic contact state, the outer seal (object side) 13b of the outer sealing portion 13 is supported by the sealing base 11b from the fixed side in the thickness direction of the sealing gasket 10, so the reaction force (elastic contact force, elastic restoring force) becomes larger, resulting in that the outer sealing portion 13 of the sealing gasket 10 is firmly and tightly attached to the surface 1a of the object part 1.

[0056] In this way, the sealing gasket 10 suppresses the intrusion of moisture into the insertion hole 2 throughout the entire circumference of the annular portion around the insertion hole 2, thereby performing a sealing function.

[0057] Meanwhile, the fixing-side protrusion 14 b of the inner seal portion 14 elastically contacts the back surface of the bolt head 31 , and the inner seal portion 14 is elastically deformed as a whole by being pressed toward the space side of the insertion hole 2 by the bolt 30 , and a portion of the inner seal portion 14 enters the insertion hole 2 .

[0058] In short, the inner seal portion 14 is not a structure supported by the core material (seal base 11b) like the outer seal (target side) 13b of the outer seal portion 13, so only a small elastic restoring force due to pressing is generated, so the reaction force is small, and it deforms more than the outer seal (target side) 13b of the outer seal portion 13, and falls into the space of the insertion hole 2. In this way, the insertion hole 2 is positioned as the retreat space of the inner seal portion 14.

[0059] As the inner sealing portion 14 is inserted into the insertion hole 2, the fixing side convex portion 14b of the inner sealing portion 14 is elastically deformed by the pressure of the back side of the bolt head 31, and its surface becomes substantially flush with the fixing side surface 11aa of the core material body 11a, so that the bolt head 31 is substantially evenly in contact with the core material 11 (see Figure 3 ).

[0060] In this way, Figure 2 The gap S (refer to Figure 2Since the gap S is substantially eliminated in this way, water intrusion from the surface side of the sealing gasket 10 can also be suppressed.

[0061] In addition, the outer sealing portion 13 is arranged at a position further outward than the bolt head 31, and does not directly contact the bolt 30 and does not form an elastic contact relationship. Therefore, the outer sealing portion 13 does not suppress the infiltration of water from the surface side of the sealing gasket 10, but instead the inner sealing portion 14 functions as described above, thereby being able to suppress the infiltration of water from the surface side.

[0062] In addition, if Figure 2 As in the state of being, the sealing gasket 10 is sandwiched between the object component 1 (mounting component 20) and the bolt head 31 in a manner of contacting with the object component 1 (mounting component 20) and the bolt head 31. Even if a large reaction force continues to be generated by the outer sealing portion 13, the inner sealing portion 14 is poured into the insertion hole 2 serving as a retreat space, so that the bolt 30 is screwed smoothly.

[0063] In short, by arranging the inner seal portion 14 radially inward of the insertion hole 2 of the counterpart component 1 , a large force is not required in the final stage of tightening the bolt 30 , and the operation becomes easy, resulting in smooth tightening of the bolt 30 .

[0064] In this embodiment, in order to allow the inner sealing portion 14 to smoothly tilt toward the insertion hole 2, as described above, the outer sealing portion 13 is arranged at a position further outward than the bolt head 31, so that the outer sealing portion 13 is constructed so as not to hinder the movement of the inner sealing portion 14 in relation to the bolt head 31, but is not limited to this relationship (the inner diameter r1 of the outer sealing portion 13>the outer diameter r2 of the bolt head 31).

[0065] In order to smoothly insert the inner seal portion 14 into the insertion hole 2, it is sufficient that at least the outer seal portion 13 does not have an elastic contact relationship with the bolt head 31. Figure 5 The description of (b) and (c) will be given later.

[0066] In addition, the inner sealing portion 14 is poured toward the insertion hole 2, as shown in FIG. Figure 2 , Figure 3 As shown in the enlarged view of , the engagement of the engagement piece 15 with respect to the shaft portion 32 is released. As a result, the reaction force generated by the engagement of the engagement piece 15 and the shaft portion 32 disappears, thereby making it easier to screw in the bolt 30, and it is also possible to prevent the sealing gasket from rotating together with the rotation of the bolt 30.

[0067] In addition, in order to enable the locking piece 15 to perform its original function (temporary integration of the bolt 30 and the sealing gasket 10), the reaction force generated by the locking of the locking piece 15 and the shaft portion 32 can be sufficiently smaller than the reaction force of the outer sealing portion 13. If it is such a weak locking force, there is no problem even if the bolt 30 is screwed in and the locking is not released.

[0068] also, Figure 1 The present sealing gasket 10 shown is symmetrical in the thickness direction, that is, there is almost no difference between the surface on the fixing side and the surface on the object side. Therefore, the sealing gasket 10 can be used without paying attention to the front and back surfaces.

[0069] As described above, in order to maintain high sealing performance and smoothly fix the target component 1 by screwing the bolt 30 , the dimensional relationship among the sealing gasket 10 , the target component 1 , and the bolt 30 only needs to be established as described above.

[0070] That is, the following dimensional relationship is sufficient.

[0071] The inner diameter r1 of the outer seal portion 13>the outer diameter r2 of the bolt head 31

[0072] The inner diameter r1 of the outer seal portion 13>the diameter r3 of the insertion hole 2 of the counterpart component 1

[0073] The diameter r3 of the insertion hole 2 of the target component 1>the inner diameter r4 of the core material 11 (the outer diameter of the inner sealing portion 14)

[0074] The outer diameter r2 of the bolt head 31>the inner diameter r4 of the core material 11

[0075] Figure 4 The mounting structure of the sealing gasket 10A shown in FIG. 1 also satisfies the above relationship. In the structure of the example in the figure, the diameter r3 of the insertion hole 2 of the target component 1 is greater than Figure 1 However, since the above relationship is satisfied, it can play the same role as Figure 1 The structure has the same effect.

[0076] As shown in the figure, the outer diameter r2 of the bolt head 31 and the diameter r3 of the insertion hole 2 may be in the relationship of r2≤r3. That is, even when the diameter r3 of the insertion hole 2 is larger than the outer diameter r2 of the bolt head 31, the above relationship can be satisfied to achieve the same effect as that of the bolt head 31. Figure 1 The structure has the same effect.

[0077] also, Figure 4 The sealing gasket 10A shown is Figure 1Unlike the sealing gasket shown, an outer sealing portion consisting only of an outer seal (object side) 13b (without an outer seal (fixed side) 13a) is used as the outer sealing portion 13, and an inner sealing portion without an object side convex portion 14c is used as the inner sealing portion 14.

[0078] Even with such a sealing gasket 10A, there are no particular problems in the elastic contact of the outer sealing portion 13 with the counterpart 1, the insertion of the inner sealing portion 14 into the insertion hole 2, and the flushness of the fixing side protrusion 14b and the core material body 11a, and it can play the role of Figure 1 The sealing gasket 10 has the same effect.

[0079] The shape of the sealing gasket 10, 10A is not limited to Figure 1 or Figure 4 The shape of the Figure 5 Sealing gaskets 10B to 10F shown in (a) to (e).

[0080] Figure 5 The outer seal portion 13 of the sealing gasket 10B of (a) includes an outer seal (fixed side) 13a and an outer seal (matched side) 13b, and also includes a connecting portion 13c connecting the outer seal (fixed side) 13a and the outer seal (matched side) 13b. The connecting portion 13c is arranged so as to cover the end surface of the outer peripheral side of the sealing base 11b.

[0081] In addition, the outer seal (target side) 13b protrudes further than the target side surface 11ab of the core body 11a, and the outer seal (fixed side) 13a protrudes further than the fixed side surface 11aa of the core body 11a. Figure 1 The same component as the inner sealing portion of (a).

[0082] The outer sealing portion 13 is provided with a connecting portion 13c so that the front and back surfaces are integrated, so that it is easy to post-install the outer sealing portion 13 formed separately from the core material 11 relative to the core material 11. For example, when the outer sealing portion 13 is made of an elastic material different from that of the inner sealing portion 14, or when a plurality of outer sealing portions 13 are prepared in a manner that allows the outer sealing portion 13 to protrude to the target component 1 side and to be replaced in a different manner corresponding to the type of the target component 1, the convenience of use is good.

[0083] Figure 5The outer sealing portion 13 of the sealing gasket 10C of (b) includes an outer sealing member (fixed side) 13a and an outer sealing member (target side) 13b, but the surface of the outer sealing member (fixed side) 13a is set to be substantially coplanar with the fixed side surface 11aa of the core body 11a. In addition, the outer sealing member (target side) 13b protrudes further than the target side surface 11ab of the core body 11a.

[0084] Since the outer seal 13 is in such a shape, it is possible to save on elastic material. In addition, since the surface outside the inner seal 14 is substantially flush with the surface, even when a bolt 30 is used such that the bolt head 31 covers the outer seal 13 from above, the outer seal (fixing side) 13a hardly comes into elastic contact with the bolt head 31 during the fixing operation of the target component 1, and the inner seal 14 can be smoothly inserted into the insertion hole 2. Figure 1 The same component as the inner sealing portion of (a).

[0085] Figure 5 The outer sealing portion 13 of the sealing gasket 10D of (c) does not include the outer sealing member (fixed side) 13a, but only includes the outer sealing member (target side) 13b that protrudes further than the target side surface 11ab of the core body 11a. In addition, the surface of the fixed side of the sealing base 11b is formed to be substantially flush with the fixed side surface 11aa of the core body 11a.

[0086] In this way, since the outer seal 13 is composed only of the outer seal (object side) 13b, it is possible to save on elastic material. In addition, there is no outer seal (fixed side) 13a, and the surface closer to the outside than the inner seal 14 is roughly the same plane. Therefore, even when a bolt 30 such as the bolt head 31 is used to cover the outer seal 13 from above, the outer seal 13 will hardly come into elastic contact with the bolt head 31 during the fixing operation of the object part 1, and the inner seal 14 can be smoothly poured into the insertion hole 2. In addition, the inner seal 14 is Figure 1 The same component as the inner sealing portion of (a).

[0087] so, Figure 5 In the relationship between the sealing gasket 10 and the bolt 30, the sealing gasket 10C and 10D shown in (b) and (c) are as follows: Figure 2 The dimensional relationship of the inner diameter r1 of the outer seal portion 13 > the outer diameter r2 of the bolt head 31 as shown in the figure may not hold.

[0088] In short, even when the sealing washers 10C and 10D are used for the bolt 30 in which the bolt head 31 covers the outer sealing portion 13 from above, the inner sealing portion 14 can be smoothly inserted into the insertion hole 2 .

[0089] Figure 5 The outer sealing portion 13 of the sealing gasket 10E of (d) is Figure 1 The outer seal portion is the same as that of the embodiment, and includes an outer seal (fixed side) 13a and an outer seal (matching side) 13b.

[0090] In addition, the core body 11a of the core material 11 is provided with a clamped portion 11ac for connecting the inner sealing portion 14 at the end on the inner peripheral side. The clamped portion 11ac is about 1 / 3 of the thickness of the core body 11a, is an annular plate same as the sealing base 11b, and is provided in a manner extending inward from the approximate center of the thickness direction of the inner peripheral end of the core body 11a. The inner sealing member body 14a, the fixed side convex portion 14b, and the object side convex portion 14c are provided at a position closer to the inner peripheral side than the clamped portion 11ac.

[0091] The inner sealing portion 14 includes, in addition to an inner sealing body 14a, a fixed side convex portion 14b and an object side convex portion 14c, a fixed side clamping piece 14e and an object side clamping piece 14f, and is fixedly connected to the core material body 11a by clamping the clamped portion 11ac of the core material body 11a using the fixed side clamping piece 14e and the object side clamping piece 14f.

[0092] Since the inner seal 14 has a pair of clamping pieces on the front and back sides, it is easy to install the inner seal 14 to the core material 11 when the inner seal 14 is formed separately. For example, when the inner seal 14 is made of an elastic material different from that of the outer seal 13, or when the protrusion degree of the inner seal 14 to the fixing member 30 side is different according to the type of the fixing member 30, it is easy to use.

[0093] In addition, the clamped portion 11ac of the core body 11a has a different function from the sealing base 11b, and is not a component that supports elastic contact behind the elastic material like the sealing base 11b. However, by making the clamping method different by adjusting the thickness of the clamping piece, the degree of indentation of the inner seal 14 (inner seal body 14a, fixed side convex portion 14b, and object side convex portion 14c) can be made different.

[0094] Figure 5 (e) The sealing gasket 10F as a whole has a profile similar to Figure 1 The sealing gasket is substantially the same as that of the embodiment of the present invention, but the engaging piece 15 is formed separately and its raw material is not the elastic material constituting the inner sealing portion 14. Figure 1The sealing gaskets are different.

[0095] The engagement piece 15 is an annular plate made of a synthetic resin material such as hard PET, which is more rigid than the material of the inner seal portion 14. The annular plate is inserted into an insertion groove 14g provided on an end surface 14d on the inner peripheral side of the inner seal body 14a of the inner seal portion 14 to function as the engagement piece 15.

[0096] The engaging piece 15 is Figure 1 The elasticity of the snap-fitting piece 15 used in the embodiment is low, and the elastic deformation of the snap-fitting piece 15 itself during the elastic deformation of the inner sealing portion 14 is smaller than that of the inner sealing portion 14. However, since the inner sealing portion 14 is bent as a whole in a manner of falling into the space of the insertion hole 2, the inner sealing portion 14 is deformed in the same manner as the inner sealing portion 14. Figure 3 (b) The engagement is released and the device is tilted in the same manner.

[0097] In this way, since the engaging piece 15 is individually molded, the size of the engaging piece 15 can be made different, and the engaging piece 15 can be replaced so as to match the diameter of the shaft portion 32 of the bolt 30 .

[0098] In addition, about Figure 5 The five examples of the sealing gaskets 10B to 10F, i.e., the mounting structures with respect to the bolt 30 and the target component 1, are not described or illustrated. Even for these sealing gaskets 10B to 10F, the relationship between the diameters r1 and r4 of each portion and the diameter r3 of the insertion hole 2 of the target component 1 and the diameter r2 of the bolt head 31 can be established as long as the above-mentioned relationship is satisfied. Figure 5 In the sealing gaskets 10C and 10D shown in (b) and (c), the relationship of the inner diameter r1 of the outer sealing portion 13 > the outer diameter r2 of the bolt head 31 does not necessarily hold.

[0099] In addition, if Figure 6 As shown in FIG. 1 , a sealing gasket 10G in which the engaging piece 15 is formed intermittently in the circumferential direction, that is, the engaging piece 15 is composed of a plurality of separate pieces 16 can also be used.

[0100] If the engaging piece 15 is formed intermittently along the circumferential direction, it is easy to release the engagement with the shaft portion 32 of the bolt 30 as the bolt 30 is screwed in, so the reaction force generated by the engaging piece 15 is reduced, making it easy to use. In particular, if a hard separation piece 16 formed separately is used, the release of the engagement becomes easy and convenient due to the separation. In addition, in the case of a separately formed engaging piece 15, it is easy to install by setting it as a separation piece 16, so the convenience is good.

[0101] in addition, Figure 6 The structure of the sealing gasket 10G is the same as that of Figure 1 The sealing gaskets are roughly the same, so Figure 6 The same components are denoted by the same reference numerals and their descriptions are omitted.

[0102] In the above embodiment, the fastening portion 31 of the fixing member 30 is an example of a bolt head 31, but the fastening portion 31 may be a nut or an annular washer. That is, the sealing gasket 10, 10A to 10G may be arranged between the nut or annular washer and the target component 1.

[0103] In addition, the internal thread portion 21 of the mounting member 20 may be formed by flanging instead of the embedded nut portion. In addition, the sealing gaskets 10, 10A to 10G and the mounting structures of the sealing gaskets 10, 10A to 10G in the above-described multiple embodiments are merely examples, and can of course be appropriately changed to configurations and shapes other than those in the respective figures.

[0104] Description of Reference Numerals

[0105] 1 Target parts

[0106] 1a Surface

[0107] 2 through holes

[0108] 10, 10A ~ 10G sealing gasket

[0109] 11 core material

[0110] 11 a core material body

[0111] 11 aa Fixed side surface

[0112] 11 ab object side surface

[0113] 11 b Sealing base

[0114] 12 Elastic sealing part

[0115] 12a Connection

[0116] 13 Outer sealing part

[0117] 13a Outer seal (fixed side)

[0118] 13b Outer seal (mate side)

[0119] 14Inner sealing part

[0120] 14a Inner seal body

[0121] 14b fixed side convex part

[0122] 14c Object side convex part

[0123] 14d End surface of inner circumference

[0124] 15 snap-on pieces

[0125] 15a Front End

[0126] 16 separation pieces

[0127] 20. Install the components

[0128] 21 Internal thread part (embedded nut part)

[0129] 30 Fasteners (bolts)

[0130] 31 Fastening part (bolt head)

[0131] 32 shaft

[0132] r1 Inner diameter of the outer sealing part

[0133] r2Outer diameter of the fastening part (bolt head)

[0134] r3 The diameter of the insertion hole of the target component

[0135] r4 The inner diameter of the core material.

Claims

1. A sealing gasket disposed between a fastening portion of a fixing member having a fastening portion and a shaft portion and a counterpart member having an insertion hole through which the shaft portion is inserted, characterized in that: The sealing gasket comprises: an annular core material; an outer sealing portion, which is formed by an elastic material fixedly connected to the end portion of the outer peripheral side of the core material; and an inner sealing portion, which is formed by an elastic material fixedly connected to the end portion of the inner peripheral side of the core material. The core material includes a core material body and a sealing base extending from the core material body toward the outer peripheral side. The outer sealing portion is arranged so that the surface facing the counterpart component among the two surfaces in the thickness direction of the sealing base protrudes further than the surface of the core material body. The inner sealing portion is configured to protrude further inwardly from the end surface on the inner peripheral side of the core material body and to protrude further toward the fastening portion than the surface of the core material body. The inner diameter of the outer sealing portion is set larger than the diameter of the insertion hole, the diameter of the insertion hole is set larger than the inner diameter of the core material, and the outer diameter of the fastening portion is set larger than the inner diameter of the core material.

2. The sealing gasket according to claim 1, characterized in that It also includes an engaging piece that protrudes inward from the end surface of the inner peripheral side of the inner sealing portion, The engaging piece is a plate-shaped piece thinner than the inner sealing portion, and a front end thereof is engaged with a peripheral surface of the shaft portion at least in a state where the inner sealing portion is not elastically deformed.

3. The sealing gasket according to claim 2, characterized in that The engaging pieces are formed intermittently along the circumferential direction.

4. The sealing gasket according to claim 2, characterized in that A thread groove is formed in the shaft portion, and a front end of the engagement piece can be engaged with the thread groove.

5. A sealing gasket mounting structure, wherein the sealing gasket is arranged between a fastening portion of a fixing member having a fastening portion and a shaft portion and a target component having an insertion hole through which the shaft portion is inserted, characterized in that: The sealing gasket according to any one of claims 1 to 4 is used.

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