JP2021134866A - Seal member - Google Patents

Abstract

To realize a seal member which can be attached to a portion to be sealed properly by tightening a screw.SOLUTION: A seal member (10) includes: a first member (11) having elasticity and having a recessed part (111); and a second member (12) which is harder than the first member (11) and entirely included in the recessed part (111).SELECTED DRAWING: Figure 1

Description

The present invention relates to a sealing member.

Sealing members are used in various mechanical elements to exhibit desired functions such as airtightness or liquidtightness. The seal member fully exhibits its intended function when properly attached at the site to be sealed. As the sealing member, for example, as shown in FIG. 15, a sealing member 700 containing a second material 702 that is generally harder than the first material 701 is known (see, for example, Patent Document 1). ).

In the seal member 700, the second material 702 is the entire second material 702 along at least a part of the lateral side portion 704 of the seal body 703 when the seal body 703 is viewed from the cross-sectional direction. To form a shield 705. The formation of the shield 705 prevents the fluid whose flow should be blocked from coming into contact with the first material 701 at the portion where the sealing member 700 should be sealed. Therefore, it is possible to extend the period of use of the seal member 700.

Japanese Unexamined Patent Publication No. 2001-124213

On the other hand, the sealing member may be attached to a portion to be sealed by tightening with a screw. In this case, if the screws are overtightened, the sealing member may be damaged or may not be installed correctly at the portion to be sealed.

When the sealing member 700 is attached by tightening with screws, only the hard second material 702 is pressed against the portion to be sealed, so whether or not the tightening strength with screws is necessary and sufficient. Difficult to judge. Therefore, the sealing member 700 may not be correctly attached to the portion to be sealed due to the tightening with the screw. As described above, in the conventional sealing member, there is room for consideration from the viewpoint of appropriately mounting the sealing member on the portion to be sealed by tightening the screw.

One aspect of the present invention is to realize a sealing member that can be appropriately attached to a portion where the sealing member should be sealed by tightening a screw.

In order to solve the above problems, the seal member according to one aspect of the present invention includes a first member having elasticity and a recess, and a second member which is harder than the first member and is entirely contained in the recess. Has a member.

According to one aspect of the present invention, the sealing member can be appropriately attached to the portion to be sealed by tightening the screw.

It is sectional drawing which shows typically an example of the structure of the seal member which concerns on Embodiment 1 of this invention. It is a top view which shows typically an example of the structure of the seal member which concerns on Embodiment 1 of this invention. It is a bottom view which shows typically an example of the structure of the seal member which concerns on Embodiment 1 of this invention. It is a figure which shows typically the state before tightening the seal member which concerns on Embodiment 1 of this invention with a screw. It is a figure which shows typically the state after tightening the seal member which concerns on Embodiment 1 of this invention with a screw. It is sectional drawing which shows typically the first example in the structure of the seal member which concerns on Embodiment 2 of this invention. It is sectional drawing which shows typically the 2nd example in the structure of the seal member which concerns on Embodiment 2 of this invention. It is sectional drawing which shows typically the 3rd example in the structure of the seal member which concerns on Embodiment 2 of this invention. It is sectional drawing which shows typically the 4th example in the structure of the seal member which concerns on Embodiment 2 of this invention. It is sectional drawing which shows typically an example of the structure of the seal member which concerns on Embodiment 2 of this invention. It is a top view which shows typically an example of the structure of the seal member which concerns on Embodiment 2 of this invention. It is a bottom view which shows typically an example of the structure of the seal member which concerns on Embodiment 2 of this invention. It is a figure which shows typically the state before tightening the seal member which concerns on Embodiment 2 of this invention with a screw. It is a figure which shows typically the state after tightening the seal member which concerns on Embodiment 2 of this invention with a screw. It is sectional drawing which shows typically an example of the conventional seal member.

[Embodiment 1]
Hereinafter, one embodiment of the present invention will be described in detail. In the following description, "~" means a range including the numbers at both ends. FIG. 1 is a cross-sectional view schematically showing an example of the configuration of the seal member according to the first embodiment of the present invention. FIG. 2 is a plan view schematically showing an example of the configuration of the seal member according to the first embodiment of the present invention. FIG. 3 is a bottom view schematically showing an example of the configuration of the seal member according to the first embodiment of the present invention. The cross-sectional view of FIG. 1 shows a cross section of the seal member shown in FIG. 2 cut along the line AA in FIG. As shown in FIGS. 1 to 3, the seal member 10 has a first member 11 and a second member 12.

[First member]
The first member 11 is made of rubber, for example, and has elasticity. Examples of the material of the first member 11 include fluororubber and hydrogenated nitrile rubber (HNBR). The material of the first member 11 can be appropriately determined according to the elasticity required for the first member 11, and the elasticity of the first member 11 can be appropriately determined according to the sealing property required for the sealing member 10. It is possible.

The material of the first member 11 may be an ordinary rubber material. The elasticity of the first member 11 can be appropriately determined according to the use of the seal member 10. Further, the hardness of the first member 11 may be appropriately determined from the range of, for example, 20 to 90. The hardness represents the magnitude of resistance to an external force of a vulcanized rubber having rubber elasticity as a numerical value from 0 to 100. The lower the number, the softer it is, and the higher the number, the harder it is. The hardness can be measured, for example, based on the description in JIS K6253.

The plane shape of the first member 11 is an annular shape, and the shape of the cross section of the first member 11 cut by a plane including the central axis CA is substantially U-shaped. The space inside the substantially U-shape of the first member 11 is a recess 111 that opens downward with respect to the paper surface of FIG. As described above, the first member 11 has the recess 111. Further, the planar shape of the first member 11 is annular, and the recess 111 is an annular recess formed so as to open into the planar portion of the first member 11.

[Second member]
The entire second member 12 is included in the recess 111. In the present embodiment, the first member 11 "encapsulates" the second member 12 means that the first member 11 is the second member 12 in the cross section along the direction in which the side walls of the recess 111 of the seal member 10 face each other. Is covered from three of the four orthogonal directions. " Alternatively, when the first member 11 "encloses" the second member 12, it is also said that "the second member housed in the recess of the first member is located inside the opening of the recess". be able to. The cross section may be a cross section when the seal member 10 is cut on a plane including the central axis CA. The second member 12 is housed in the bottom of the recess 111 of the first member 11, and has a slight gap between the second member 12 and the opening of the recess 111 in the direction along the central axis CA.

The second member 12 is harder than the first member 11. The second member 12 may be harder than the first member 11 so that the tightening strength of the screw is sufficiently increased when the sealing member 10 is attached to the portion to be sealed by tightening with a screw described later. When the seal member 10 is attached by tightening with screws, the operator can detect a lighter first response and a heavier second response. For example, the first response is a response in which the effect of tightening by a screw is substantially absorbed by the first member 11 by the elasticity of the first member 11, and the second response is a response in which the second member 12 thereafter is absorbed. It is a response according to the hardness of.

From the viewpoint of bringing about a change in the tightening strength of the screw as described above, the second member 12 may be sufficiently hard with respect to the first member 11, and the hardness of such a second member is the second member. It is possible to decide appropriately depending on the material of. For example, when the material of the second member is rubber, the above-mentioned hardness of the second member is preferably 10 or more higher than the hardness of the first member.

The hardness of the second member 12 may be measured by the same method as the hardness of the first member 11, or a conversion of a value measured by another measurement method of hardness comparable to the hardness of the first member 11. It may be a value. Alternatively, the hardness value of the first member 11 and the hardness value of the second member 12 may be catalog values regardless of the difference in the methods of obtaining them, as long as the hardness can be compared. ..

The material of the second member 12 may be any material that makes the second member 12 harder than the first member 11. The material of the second member 12 can be appropriately determined according to the first member 11. Examples of the material of the second member 12 include hard plastics, metals such as iron, and sintered bodies of metal oxides. Examples of plastics include polytetrafluoroethylene, nylon, polyethyl ethyl ketone and polyamide.

The material of the first member 11 and the material of the second member 12 can be determined depending on various reasons such as the performance required for the seal member 10 or the environment in which the seal member 10 is used.

For example, specific examples of the material of the first member 11 include elastic materials conventionally known as materials for O-rings, such as rubber or thermoplastic elastomer (TPE). Examples of the rubber include nitrile rubber (NBR), hydride nitrile rubber (NBM / HNBR), fluororubber (FKM), perfluoropolyether rubber (FO), fluorosilicone rubber (FVMQ), and silicone rubber (Q). ), Epichlorohydrin rubber (CO), acrylic rubber (ACM), ethylene / propylene rubber (EPM), chloroprene rubber (CR), styrene / butadiene rubber (SBR), butyl rubber (IIR), natural rubber (NR) and urethane rubber ( U) is included.

Examples of the above-mentioned thermoplastic elastomer (TPE) include styrene-based TPE (SBC, TPS), olefin-based TPE (TPO), polyvinyl chloride-based TPE (TPVC), polyurethane-based TPE (TPU), and polyester-based TPE. (TPEE, TPC), polyamide-based TPE (TPA, TPAE) and polybutadiene-based TPE.

The material of the second member 12 is preferably a material harder than that of the first member 11, and may be the above-mentioned rubber material, metal or resin. The material of the first member 11 and the material of the second member 12 can be appropriately determined according to the type of fluid (acid, alkali, water, oil, etc.) to be sealed by the sealing member 10, respectively.

The shape of the second member 12 is an annular shape, and the second member 12 is, for example, an annulus made of polytetrafluoroethylene. The second member 12 exists continuously in the circumferential direction of the seal member 10, but the shape and arrangement of the second member 12 are appropriately arranged within a range in which the above-mentioned change in tightening strength due to the screw can be detected. It is possible to decide. For example, when the seal member 10 is attached to a portion to be sealed by being pressed along the central axis CA, the second member 12 is included only in a part of the recess 111 in the circumferential direction. There may be. Alternatively, the second member 12 may be in a form in which a plurality of second members 12 are intermittently arranged in the recess 111 along the circumferential direction.

Further, the cross-sectional shape of the second member 12 when the second member 12 is cut on the plane including the central axis CA is circular, but the cross-sectional shape is not limited to the circular shape from the viewpoint of causing the above-mentioned change in the tightening strength of the screw. .. The cross-sectional shape of the second member 12 may be a rectangle, a polygon other than a quadrangle such as a triangle, or a non-circle such as an ellipse. The cross-sectional shape of the second member 12 is preferably circular from the viewpoint of avoiding the local concentration of the pressing force on the first member 11, but it is appropriate depending on the application of the seal member 10 or the shape of the first member 11. It is possible to decide on.

[Installation of seal members]
FIG. 4 is a diagram schematically showing a state before tightening the seal member according to the first embodiment of the present invention with screws. The seal member 10 can be used to seal the gap between the joint 101 and the pipe 103 in the pipe joint structure 100 including the joint 101, the socket 102, and the pipe 103.

As shown in FIG. 4, in the pipe joint structure 100, the joint 101 is a tubular joint in which a male screw is formed on the outer peripheral surface thereof. The socket 102 has a cup-shaped cross section, and a female screw to be screwed into a male screw is formed on the inner peripheral surface of the socket 102. Further, a hole 121 is formed in the bottom surface of the socket 102. The tube 103 has a flange portion 131 at the end thereof, and is inserted into the hole 121 of the socket 102 from the inside of the socket 102. The flange portion 131 is housed in the socket 102 and is in contact with the bottom surface of the socket 102.

The seal member 10 is placed on the flange portion 131 in the socket 102 with the opening of the recess 111 facing the flange portion 131. Next, the joint 101 is screwed into the socket 102. As the joint 101 is screwed into the socket 102, the joint 101 enters the socket 102 toward the bottom surface of the socket 102 and eventually comes into contact with the first member 11 of the seal member 10. The operator who has screwed the joint 101 into the socket 102 when it comes into contact with the seal member 10 feels the first response according to the elasticity of the first member 11.

FIG. 5 is a diagram schematically showing a state after tightening the seal member according to the first embodiment of the present invention with screws. When the operator further screwes the joint 101 into the socket 102, the first member 11 is pressed by the joint 101 and is sufficiently deformed as shown in FIG. For example, the seal member 10 is pressed in the direction along the central axis CA and deforms so that the opening of the recess 111 of the first member 11 reaches the position of the second member 12. In this way, the seal member 10 is deformed so that, for example, the second member 12 is in contact with the flange portion 131.

At this time, the operator who screwed the joint 101 feels a second response according to the hardness of the second member 12. The second response is, for example, a response as if the tip of the joint 101 hits something, although the joint 101 is still rotatable. In this way, a change in the tightening strength due to the screw when mounting the seal member 10 is detected. The tightening work of the joint 101 up to this point is performed, for example, by the hands of an operator.

The operator completes the work of screwing the joint 101 into the socket 102 according to the desired airtightness in the pipe joint structure 100. For example, the operator may complete the work of screwing the joint 101 into the socket 102 when he / she feels the second response, thereby completing the mounting of the seal member 10. Alternatively, the operator may complete the mounting of the seal member 10 by further screwing the joint 101 into the socket 102 so as to have a further predetermined tightening strength when the operator feels the second response. Such a further screwing operation may be an operation of further screwing the joint 101 into the socket 102 at a predetermined rotation angle (for example, 60 ° or the like). Alternatively, the work may be a work of further screwing the joint 101 into the socket 102 using a torque wrench set to a predetermined torque.

[Action effect]
The operator who attaches the seal member 10 by tightening with a screw has the first response that the displacement of the screw due to the tightening with the screw is substantially absorbed by the elasticity of the seal member 10, and the hardness of the second member 12 thereafter. It is possible to detect a second response that responds. Therefore, the seal member 10 is attached to the portion to be sealed by appropriate tightening with screws. Therefore, when mounting the seal member 10, it is possible to prevent the first member 11 from being damaged by excessive tightening with screws.

Further, in the seal member 10, the elastic first member 11 includes the second member 12. Therefore, at the portion to be sealed, the elastic first member 11 continuously exists over the entire length in the direction of pressing the seal member 10 by tightening with screws (in the figure, the direction along the central axis CA). Therefore, the first member 11 is continuously present in the gap between the joint 101 and the flange portion 131, and is sufficiently in close contact with both the joint 101 and the flange portion 131. Therefore, the sealing member 10 exhibits the desired sealing property according to the elasticity of the first member 11 at the portion to be sealed.

[Embodiment 2]
Other embodiments of the present invention will be described below. For convenience of explanation, the same reference numerals will be added to the members having the same functions as the members described in the above embodiment, and the description will not be repeated.

Each of the seal members according to the present embodiment is a convex portion formed on the inner peripheral surface at the open end of the concave portion, and further has an engaging portion that engages with the second member contained in the concave portion. The other configurations are the same as those in the above-described first embodiment.

[First example]
FIG. 6 is a cross-sectional view schematically showing a first example in the configuration of the seal member according to the second embodiment of the present invention. As shown in FIG. 6, the seal member 20 has a first member 21 and a second member 12.

The first member 21 is made of rubber, for example. The first member 21 has a pair of ridge portions 211, 211 protruding from the respective wall portions inside the wall portions facing each other at the opening of the recess 111. The ridges 211 and 211 project from each other, but have a gap between them. The ridges 211 and 211 are engaged with the second member 12 included in the first member 21. As described above, the ridge portion 211 is the above-mentioned engaging portion.

The seal member 20 is more strongly suppressed from falling off from the recess 111 of the second member 12 as compared with the seal member 10 of the first embodiment described above. Therefore, even in a situation where the second member 12 is likely to fall out of the recess 111, it is possible to prevent the second member 12 from falling out of the opening of the recess 111. The situation in which the second member 12 is likely to fall off from the recess 111 is, for example, a case where the opening of the recess 111 is directed downward, or a case where vibration is further applied with the opening of the recess 111 directed downward.

[Second example]
FIG. 7 is a cross-sectional view schematically showing a second example in the configuration of the seal member according to the second embodiment of the present invention. As shown in FIG. 7, the seal member 30 has a first member 31 and a second member 12. The first member 31 is made of rubber, for example. The first member 31 is configured in the same manner as the first member 21 in the first example described above, except that the cross-sectional shape thereof is substantially V-shaped convex upward with respect to the paper surface in the drawing. .. The seal member 30 is more suitable when it is placed on a convex top and used for a seal. Such a convex top is, for example, a portion of a ridge having a circular planar shape and a mountain-shaped cross section.

[Third example]
FIG. 8 is a cross-sectional view schematically showing a third example in the configuration of the seal member according to the second embodiment of the present invention. As shown in FIG. 8, the seal member 40 has a first member 41 and four second members 421-424. The first member 41 is made of rubber, for example. The second members 421 to 424 are made of, for example, polytetrafluoroethylene.

The first member 41 has a substantially X-shaped cross section and has four recesses 411 to 414. Each of the recesses 411 to 414 is a substantially V-shaped groove formed between two facing wall portions in the cross-sectional shape of the first member 41.

The recess 411 and the recess 412 are open in the direction along the central axis CA. The recess 411 is open upward with respect to the paper surface of FIG. 8, and the recess 412 is open downward with respect to the paper surface of FIG. The recess 413 and the recess 414 are open in a direction orthogonal to the central axis CA. The recess 413 is open toward the central axis CA, and the recess 414 is open toward the opposite side (outside) of the central axis CA. Both the recess 411 and the recess 412 have a pair of ridges 415 and 415 protruding from the respective wall portions inside the wall portions facing each other at the opening thereof.

The second members 421 to 424 are arranged at the bottom of each of the recesses 411 to 414. Therefore, each of the second members 421 to 424 is arranged at the bottom of four substantially V-shaped grooves formed by the first member 41 having a substantially X-shaped cross section, and a pair of the grooves are formed. It is sandwiched between slopes. As described above, each of the second members 421 to 424 is surrounded by the first member 41 from three of the four directions orthogonal to each other in the cross section of the first member 41, and therefore, the first member 41 is surrounded by the first member 41. It is included.

The plane shape of each of the second members 421 to 424 is annular, and the cross-sectional shape thereof is circular. The second member 421 and the second member 422 both have the same dimensions. The second member 423 has a smaller diameter than the second member 421 and the second member 422, and the second member 424 has a larger diameter than the second member 421 and the second member 422. There is.

The second member 421 is arranged in the recess 411, and the second member 422 is arranged in the recess 412. The ridge portion 415 is engaged with both the second member 421 and the second member 422. The second member 423 is arranged in the recess 413, and the second member 422 is arranged in the recess 414.

The seal member 40 has a double second member (423, 424) in a direction orthogonal to the central axis CA. Therefore, when the seal member 40 provided for the seal receives an external force in a direction orthogonal to the central axis CA, it is advantageous from the viewpoint of suppressing deformation in that direction.

[Fourth example]
FIG. 9 is a cross-sectional view schematically showing a fourth example in the configuration of the seal member according to the second embodiment of the present invention. As shown in FIG. 9, the seal member 50 has a first member 51 and a second member 12.

The first member 51 is made of rubber, for example. The first member 51 has a substantially Y-shaped cross section, and has a recess 511 above the paper surface of FIG. 9 of the first member 51. The recess 511 is a substantially V-shaped groove formed between two opposing wall portions corresponding to a Y-shaped branched line in a substantially Y-shape. Each of the recesses 511 has a pair of ridges 512 and 512 protruding from the respective wall portions inside the wall portions facing each other at the opening thereof. The second member 12 is included in the recess 511 and is engaged with the ridges 512 and 512.

The seal member 50 has a substantially Y-shaped cross-sectional shape. Therefore, when the first member 51 is compressed in the direction along the central axis CA and used for the seal, the amount of deformation of the first member 51 in that direction is large. Therefore, in the gap to be sealed, the elastic first member 51 is pressed more strongly against one surface forming the gap, which is preferable from the viewpoint of improving the sealing at the time of sealing. ..

[Embodiment 3]
Other embodiments of the present invention will be described below. For convenience of explanation, the same reference numerals will be added to the members having the same functions as the members described in the above embodiment, and the description will not be repeated. FIG. 10 is a cross-sectional view schematically showing an example of the configuration of the seal member according to the second embodiment of the present invention. FIG. 11 is a plan view schematically showing an example of the configuration of the seal member according to the second embodiment of the present invention. FIG. 12 is a bottom view schematically showing an example of the configuration of the seal member according to the second embodiment of the present invention. As shown in FIGS. 10 to 12, the seal member 60 has a first member 61 and a second member 62.

[composition]
The first member 61 has elasticity and is made of rubber, for example. Further, the first member 61 has a recess 611. More specifically, the first member 61 is composed of a bottom surface portion 612 and a wall portion 613 that stands up from the periphery of the bottom surface portion 612, and the recess 611 is formed by the inner surfaces of the bottom surface portion 612 and the wall portion 613. Has been done. In the first member 61, the planar shape when the bottom surface portion 612 is viewed in a plan view is circular, and the planar shape of the wall portion 613 is an annular shape.

The second member 62 is harder than the first member 61, for example, a metal disk, and its diameter is substantially the same as the inner diameter of the first member 61. The second member 62 is fitted into the recess 611 by pushing the second member 62 from the opening of the recess 611 to the bottom surface portion 612, for example. Since the wall portion 613 has elasticity, the peripheral edge portion of the hard second member 62 bites into the wall portion 613, and the second member 62 is fixed to the bottom of the recess 611. Further, the second member 62 is surrounded by a wall portion 613 facing each other and a bottom surface portion 612 connecting the two wall portions 613 in a cross section including the central axis CA. As described above, the second member 62 is held in the recess 611 only by the first member 61, and is included in the first member 61.

[Installation of seal members and effects]
FIG. 13 is a diagram schematically showing a state before tightening the seal member according to the second embodiment of the present invention with screws. The sealing member can be used to seal a through hole formed in the outer wall of the housing.

As shown in FIG. 13, the housing 300 has an outer wall 301, and the outer wall 301 has a bottomed screw hole 302. The screw hole 302 has a hole 303 that opens at the bottom thereof, and the hole 303 communicates with the internal space of the housing 300. In this way, the internal space and the external space of the housing 300 communicate with each other through the screw holes 302 and the holes 303. The sealing member 60 is used to seal the hole 303.

The seal member 60 is placed on the opening edge of the hole 303 at the bottom of the screw hole 302 with the opening of the recess 611 facing upward. Next, the screw 304 is screwed into the screw hole 302. The screw 304 eventually comes into contact with the first member 61 of the seal member 60. The operator who has tightened the screw 304 feels the first response according to the elasticity of the first member 61.

FIG. 14 is a diagram schematically showing a state after tightening the seal member according to the second embodiment of the present invention with screws. When the operator further tightens the screw 304, the first member 61 is pushed by the screw 304 and further and sufficiently deformed, and the screw 304 reaches the second member 62 in the direction along the central axis CA. The operator who has tightened the screw feels a second response according to the hardness of the second member 62. The operator further tightens the screw 304 as needed. In this way, the sealing member 60 is appropriately attached to the portion to be sealed by appropriately tightening the screw 304, and the hole 303 is sufficiently sealed by the elastic first member 61. Further, when the seal member 60 is attached, the first member 61 is prevented from being damaged due to excessive tightening of the screw 304.

[Modification example]
The present invention is not limited to the above-described embodiments. Various modifications can be made within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in the different embodiments are also included in the technical scope of the present invention.

For example, in the first, second, and fourth examples of the first and second embodiments, the recess of the first member may be opened in a direction crossing the central axis CA. For example, the recess may be opened toward the central axis CA in a direction orthogonal to the central axis CA, or may be opened toward the opposite side (outer side) of the central axis CA. Further, in the first and second examples of the first and second embodiments, the sealing member may be arranged on the flange portion with the opening of the recess facing upward with respect to the paper surface in the drawing.

Further, in the third example of the second embodiment, the second member may be arranged only in a part of the four recesses. For example, the seal member may have only one or both of the second members 423 and 424 as the second member, or may have only one of the second members 423 and 424. good. Even in this case, the same effect as that of the first embodiment can be obtained.

Further, in the third embodiment, when the size of the second member is larger than the hole, the seal member may be arranged in the screw hole with the second member facing the hole. Further, the seal member is formed on the inner peripheral surface of the opening end portion of the recess, and further includes an engaging portion that engages with the second member contained in the recess, similarly to the ridge portion in the first and second embodiments. You may have. This configuration is suitable from the viewpoint of preventing the second member from falling off from the recess.

〔summary〕
The seal member (10, 20, 30, 40, 50, 60) according to the embodiment of the present invention is a first member (111, 411, 421, 413, 414, 511, 611) having elasticity and recesses (111, 411, 421, 413, 414, 511, 611). It has 11, 21, 31, 41, 51, 61) and a second member (12, 62, 421, 422, 423, 424) that is harder than the first member and is entirely contained in the recess. When the sealing member is attached to a portion to be sealed by tightening a screw, the sealing member exhibits a first response according to the elasticity of the first member and a second response according to the hardness of the second member. .. Therefore, according to the embodiment of the present invention, it is possible to prevent the first member from being damaged due to excessive tightening of the screw, and as a result, the sealing member can be appropriately attached to the portion to be sealed by tightening the screw. can.

In the embodiment of the present invention, the planar shape of the first member may be annular, and the recess may be an annular recess formed so as to open into the annular planar portion of the first member. It is even more effective from the viewpoint of realizing a sealing member applicable to an annular portion to be sealed such as around a pipe or around an axis.

Further, in the embodiment of the present invention, the first member is composed of a bottom surface portion (612) and a wall portion (613) standing up from the periphery of the bottom surface portion, and a recess is formed by the bottom surface portion and the inner surface of the wall portion. It may have been done. This configuration is even more effective from the viewpoint of realizing a sealing member that closes the through hole of the housing (300).

Further, the seal member according to the embodiment of the present invention is a convex portion formed on the inner peripheral surface of the opening end portion of the concave portion, and is an engaging portion (protrusion) that engages with the second member contained in the concave portion. It may further have strips 211, 415, 512). This configuration is even more effective from the viewpoint of preventing the second member from falling out of the recess.

10, 20, 30, 40, 50, 60, 700 Sealing member 11, 21, 31, 41, 51, 61 First member 12, 62, 421, 422, 423, 424 Second member 100 Pipe fitting structure 101 Fitting 102 Socket 103 Tube 111, 411, 421, 413, 414, 511, 611 Recessed 121, 303 Hole 131 Flange 211, 415, 512 Protruding 300 Housing 301 Outer wall 302 Screw hole 612 Bottom 613 Wall 701 First material 702 Second material 703 Seal body 704 Side 705 Shield

Claims (4)

The first member, which is elastic and has a recess,
A seal member having a second member that is harder than the first member and that is entirely contained in the recess. The seal member according to claim 1, wherein the first member has an annular planar shape, and the concave portion is an annular concave groove formed so as to open in an annular planar shape portion of the first member. The first member is composed of a bottom surface portion and a wall portion that stands up from the periphery of the bottom surface portion.
The recess is formed on the inner surface of the bottom surface portion and the wall portion.
The seal member according to claim 1. Any of claims 1 to 3, which is a convex portion formed on the inner peripheral surface of the open end portion of the concave portion and further has an engaging portion that engages with the second member contained in the concave portion. The sealing member according to one item.

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