TWI701401B - Configuration structure of sealing material - Google Patents

Abstract

The arrangement structure of the sealing material of the present invention includes: a first member (21); a second member (31) formed with a groove (35); and a sealing material (110) housed in the groove (35). The second member (31) has a groove bottom surface (36) and a groove side surface (37). The sealing material (110) has a base (11) and a protrusion (12) protruding from the base (11) to the groove side surface (37). The protrusion (12) includes a front end (13) positioned away from the groove side surface (37). The groove side surface (37) includes an inner circumferential side groove side surface (37m) arranged on the inner circumferential side of the groove portion (35) and an outer circumferential side groove side surface (37n) arranged on the outer circumferential side of the groove portion (35). The base (11) is in contact with the inner circumferential groove side surface (37m). The protruding part (12) protrudes from the base part (11) to the outer circumferential groove side surface (37n). With such a structure, the present invention provides an arrangement structure of a sealing material that makes the mounting of the sealing material good and prevents the sealing material from rolling.

Description

Configuration structure of sealing material

The present invention relates to an arrangement structure of a sealing material.

Regarding the arrangement and structure of the previous sealing material, for example, Japanese Patent No. 7-41969 discloses an O-ring, which prevents the O-ring from being affected by fluid pressure such as a pulsating pressure even when the movable member moves. The purpose is to roll and deform the top of the O-ring (Patent Document 1). The O-ring disclosed in Patent Document 1 has: a ring-shaped O-ring body, which is installed in an annular groove and has a substantially circular cross-sectional shape; and protrusions, which face the ring from both sides of the O-ring body The two sides of the groove protrude. In addition, Japanese Patent Laid-Open No. 55-93758 discloses an O-ring holding structure of a hydraulic machine for the purpose of not falling off from the O-ring groove (Patent Document 2). In the O-ring holding structure of the hydraulic machine disclosed in Patent Document 2, the width of the O-ring groove is set to be slightly larger than the diameter of the O-ring, and the O-ring is provided at the required position of the O-ring. The width of the groove is slightly wider. In addition, Japanese Patent Laid-Open No. 2008-298246 discloses a seal ring for a flat surface. The seal ring does not protrude or jam into the sealing surface from the seal groove during or after assembly of fluid machinery. The purpose is to assemble the seal groove (Patent Document 3). In the flat seal ring disclosed in Patent Document 3, a flange-like extension extending from the body ring to the width direction of the seal groove is provided on the pressure application side of the sealed fluid in the width direction of the installation groove of the seal ring. Out. The extension part is within a part of the length along the circumference of the body ring, and is integrally provided with the body part. [Prior Art Document] [Patent Document] [Patent Document 1] Japanese Patent Publication No. 7-41969 [Patent Document 2] Japanese Patent Publication No. 55-93758 [Patent Document 3] Japanese Patent Publication 2008-298246 Bulletin

[Problems to be Solved by the Invention] As disclosed in the aforementioned patent documents, various sealing materials accommodated in annular grooves have been proposed as mechanisms for sealing fluids. In this type of sealing material, there are cases where the member to which the sealing material is attached may slightly slide due to pressure pulsation of the sealed fluid. In this case, the sealing material rolls in the groove, and there is a concern that the sealing material may be damaged or shortened. On the other hand, in order to prevent rolling in the groove of such a sealing material, a method of making the sealing material a characteristic cross-sectional shape is considered. However, depending on the cross-sectional shape of the sealing material, there is a concern that the sealing material easily protrudes from the groove and impairs the mountability of the sealing material. Therefore, the object of the present invention is to solve the above-mentioned problems, and to provide a sealing material arrangement structure that allows the sealing material to be installed well and prevents the sealing material from rolling. [Technical Means to Solve the Problem] The arrangement structure of the sealing material according to the present invention includes: a first member having a first facing surface; a second member having a second facing surface facing the first facing surface, and A groove portion recessed from the second facing surface and extending in a ring shape is formed; and a closed ring-shaped sealing material is accommodated in the groove portion and seals between the first member and the second member. The second member further has: a groove bottom surface facing the first opposite side to form the bottom wall of the groove portion; and groove side surfaces rising from the groove bottom surface to the second opposite surface to form the side wall of the groove portion. The sealing material has a base that is in contact with the first facing surface and the bottom surface of the groove, and a protrusion that protrudes from the base to the side surface of the groove. The front end of the protruding portion protruding to the side surface of the groove includes a front end portion positioned away from the side surface of the groove. The groove side surface includes an inner circumferential groove side surface arranged on the inner circumferential side of the groove portion and an outer circumferential side groove side surface arranged on the outer circumferential side of the groove portion. The base is in contact with any one of the inner circumferential side groove side surface and the outer circumferential side groove side surface. The protruding portion protrudes from the base to either the inner circumferential side groove side surface and the outer circumferential side groove side surface. [Effects of the Invention] According to the present invention, it is possible to provide an arrangement structure of a sealing material that improves the mounting performance of the sealing material and prevents the sealing material from rolling.

The embodiments of the present invention will be described with reference to the drawings. In addition, in the drawings referred to below, the same or equivalent components are marked with the same numbers. (Embodiment 1) Fig. 1 is a plan view showing the sealing material. Fig. 2 is a cross-sectional view showing the steps of installing the sealing material in Fig. 1 on the groove. Fig. 3 is a cross-sectional view showing the state in which the sealing material in Fig. 1 is installed in the groove (the state where fluid pressure does not act on the sealing material). In this specification, in particular, the state of the single body of the sealing material shown in FIG. 1 is referred to as the "unmounted state", and the state of the sealing material shown in FIG. 2 is referred to as the "initial state". Referring to FIGS. 1 to 3, the arrangement structure of the sealing material in this embodiment includes the sealing material 110, the first member 21, and the second member 31. The sealing material 110 is a closed-loop sealing material, and is used for sealing between the first member 21 and the second member 31. The sealing material 110 is formed of an elastic member such as rubber. As the rubber material used for the sealing material 110, for example, fluororubber, silicone rubber, EPDM (Ethylene Propylene Diene Monomer: ethylene propylene diene monomer) rubber, etc., having a hardness of about 60 to 70 HA can be cited. The first member 21 has a first facing surface 22. The second member 31 has a second facing surface 32. The first member 21 and the second member 31 are arranged such that the first facing surface 22 and the second facing surface 32 face each other. The material forming the first member 21 and the second member 31 is not particularly limited, but in this embodiment, the first member 21 is formed of resin, and the second member 31 is formed of metal. The second member 31 has a groove 35 formed thereon. The sealing material 110 is accommodated in the groove 35. The groove 35 is recessed from the second facing surface 32 and extends in a ring shape. The groove portion 35 has a groove shape that opens on the second facing surface 32 and extends in the surface of the second facing surface 32. The shape of the groove 35 extending in a ring shape is not particularly limited, and is, for example, a circle, an ellipse, a rectangle, and the like. The groove portion 35 has a groove bottom surface 36 and a groove side surface 37. The groove bottom surface 36 faces the first facing surface 22 and forms the bottom wall of the groove portion 35. The groove bottom surface 36 is arranged in parallel with the second facing surface 32. The groove bottom surface 36 is arranged parallel to the first facing surface 22. The groove side surface 37 rises from the groove bottom surface 36 to the second facing surface 32 to form the side wall of the groove portion 35. The groove side surface 37 includes an inner circumferential side groove side surface 37m and an outer circumferential side groove side surface 37n. 37 m of inner circumferential side groove side surfaces are arranged on the inner circumferential side of the groove portion 35, and 37 n of outer circumferential side groove side surfaces are arranged on the outer circumferential side of the groove portion 35. 37 m of inner circumferential side groove side surfaces and 37 n of outer circumferential side groove side surfaces are opposed to each other with groove bottom surface 36 interposed therebetween. In this embodiment, the groove bottom surface 36 and the groove side surfaces 37 (the inner circumferential side groove side surface 37m, the outer circumferential side groove side surface 37n) are curved and connected. The angle formed by the extension line of the groove bottom surface 36 and the extension line of the groove side surface 37 is 90° or more. The opening width of the groove portion 35 (the length between the inner circumferential groove side surface 37m of the second facing surface 32 and the outer circumferential groove side surface 37n) is greater than the depth of the groove portion 35 (between the second facing surface 32 and the groove bottom surface 36 The length). The sealing material 110 has a base 11 and a protrusion 12 as its constituent parts. The base 11 forms the main part of the sealing material 110 and has a function of sealing between the first member 21 and the second member 31. That is, the base 11 is in contact with the first facing surface 22 and the groove bottom surface 36. The base 11 is compressed and deformed in the direction in which the first facing surface 22 and the groove bottom surface 36 approach each other. The base portion 11 is in contact with the inner circumferential groove side surface 37m which is one of the inner circumferential side groove side surface 37m and the outer circumferential side groove side surface 37n. The base 11 is in contact with the inner circumferential groove side surface 37m in a state where the fluid pressure is not acting on the sealing material 110 shown in FIG. 3. When the base 11 is in contact with the inner circumferential groove side surface 37 m, a force in the diameter expansion direction acts on the sealing material 110. In the unmounted state (that is, the state in which the force is not applied to the sealing material 110 from the first member 21 and the second member 31), in a plane orthogonal to the tangential direction of the sealing material 110 extending in a closed loop When the sealing material 110 is cut, the base 11 has a curved shape at a position opposed to the first facing surface 22 and the groove bottom surface 36. In the unmounted state, when the sealing material 110 is cut by a plane orthogonal to the tangential direction of the sealing material 110 extending in a closed loop, the base 11 is positioned opposite to the inner circumferential groove side surface 37m The location has a curved shape. In the unmounted state, when the sealing material 110 is cut by a plane orthogonal to the tangential direction of the sealing material 110 extending in a closed loop, the base 11 has a circular shape. In the initial state shown in FIG. 2, the base 11 is in contact with the corners of the groove bottom surface 36 and the inner circumferential groove side surface 37m. The protrusion 12 is integrally formed with the base 11. The protruding portion 12 protrudes from the base portion 11 toward the outer circumferential groove side surface 37n, which is the other of the inner circumferential side groove side surface 37m and the outer circumferential side groove side surface 37n. The base 11 is in contact with the groove side surface 37 on the side opposite to the protrusion 12. The protruding portion 12 has a flange shape protruding from the base portion 11 to the outer peripheral side thereof. The protruding portion 12 protrudes from the base 11 to the outside in the radial direction of the sealing material 110. The length (thickness) of the protrusion 12 in the direction opposite to the first facing surface 22 and the groove bottom 36 is smaller than the length (thickness) of the base 11 in the direction opposite to the first facing surface 22 and the groove bottom 36. The protrusion 12 is provided over the entire circumference of the sealing material 110. The protruding portion 12 has a front end portion 13 as its constituent part. The front end 13 is provided at the front end of the protrusion 12 protruding from the base 11 toward the outer circumferential groove side surface 37n. In the direction facing 37 m of the inner circumferential groove side surface and 37 n of the outer circumferential groove side surface, the front end portion 13 is arranged closest to the outer circumferential groove side surface 37 n among the sealing material 110. In the direction facing 37 m of the inner circumferential groove side surface and 37 n of the outer circumferential groove side surface, the front end 13 is arranged at the farthest from the inner circumferential groove side surface 37 m among the sealing material 110. The tip 13 is positioned away from the outer groove side surface 37n. In a state where the fluid pressure is not acting on the sealing material 110 shown in FIG. 3, the tip portion 13 is positioned away from the outer circumferential groove side surface 37n. A gap is provided between the front end portion 13 and the outer circumferential groove side surface 37n. In the unmounted state, when the sealing material 110 is cut by a plane orthogonal to the tangential direction of the sealing material 110 extending in a closed loop, the protrusion 12 is positioned opposite to the outer circumferential groove side surface 37n The location has a curved shape. The sealing material 110 has a cross-sectional shape that can be divided up and down symmetrically by a plane including the tip portion 13. The protrusion 12 is positioned away from the first facing surface 22 and the groove bottom surface 36. The protrusion 12 is positioned parallel to the first facing surface 22 and the groove bottom surface 36. 4 and 5 are cross-sectional views showing the deformation of the sealing material during the reciprocating sliding of the first member in FIG. 3. 4 and 5, on the inner peripheral side of the sealing material 110 (viewed from the sealing material 110 as the 37m side of the inner peripheral groove side surface), a fluid space accompanied by pressure pulsation is formed. In such a configuration, the first member 21 generates minute reciprocating sliding in the direction facing the inner circumferential groove side surface 37m and the outer circumferential side groove side surface 37n. As shown in FIG. 4, if the first member 21 slides in the direction from the inner circumferential groove side surface 37m to the outer circumferential groove side surface 37n, the portion of the base 11 that contacts the first facing surface 22 follows the first member 21 The movement is pulled in a direction approaching 37n of the outer groove side surface, and on the other hand, the portion of the base 11 that is in contact with the groove bottom surface 36 tends to stop due to the frictional resistance of the second member 31. As a result, the sealing material 110 acts on the force to rotate the base 11 in the direction close to the outer groove side surface 37n. At this time, as the protrusion 12 abuts against the groove bottom surface 36, the sealing material 110 can be prevented from rolling. As shown in Fig. 5, if the first member 21 slides from the outer circumferential groove side surface 37n to the inner circumferential side groove side surface 37m, the portion of the base 11 that contacts the first facing surface 22 follows the first member The movement of 21 is pulled in a direction approaching 37 m of the inner groove side surface. On the other hand, the portion of the base 11 that is in contact with the groove bottom surface 36 tends to be stationary due to the frictional resistance of the second member 31. As a result, the sealing material 110 acts to force the base 11 to rotate in a direction close to 37 m of the inner circumferential groove side surface. At this time, as the protrusion 12 abuts on the first facing surface 22, the sealing material 110 can be prevented from rolling. 2 and 3, if the protrusion 12 used to prevent rolling is provided on the sealing material 110 as described above, when the sealing material 110 is installed in the groove 35, the protrusion 12 may protrude from the groove 35. . In this case, the protrusion 12 is sandwiched between the first facing surface 22 and the second facing surface 32, and the sealing performance of the sealing material 110 is greatly impaired. On the other hand, in this embodiment, the sealing material 110 is attached to the groove part 35 in the state in which the base part 11 contacted 37 m of inner peripheral side groove side surfaces. With this configuration, when the sealing material 110 is mounted to the groove 35, the protrusion 12 is unlikely to protrude from the groove 35, so that the sealing material 110 can be easily attached. In addition, in this embodiment, the base 11 has a curved shape at a position opposed to the first facing surface 22, the groove bottom surface 36, and the inner peripheral groove side surface 37m. With this configuration, during the reciprocating sliding of the first member 21, the base 11 can be smoothly rotated in the groove 35 before the protrusion 12 abuts on the groove bottom surface 36 or the first facing surface 22. Thereby, it is possible to prevent excessive internal stress from being generated in the sealing material 110. That is, the arrangement structure of the sealing material of this embodiment allows the initial rolling of the sealing material 110, and prevents further rolling of the sealing material 110 after the protrusion 12 abuts on the groove bottom surface 36 or the first facing surface 22, thereby one side To prevent the damage of the sealing material 110, it is desired to extend the life of the sealing material 110. In addition, in this embodiment, the case where the fluid space is formed on the inner peripheral side of the sealing material 110 has been described, but the fluid space may be formed on the outer peripheral side of the sealing material 110. That is, the protrusion may be provided on the side of the fluid space or on the side opposite to the fluid space. The fluid arranged in the fluid space can be a gas or a liquid. 6 is a cross-sectional view showing a variation of the shape of the groove shown in FIG. 2. As shown in FIG. 6, in the initial state, a gap may be formed between the corners of the base 11 and the groove bottom surface 36 and the inner circumferential groove side surface 37m. If the arrangement structure of the sealing material in the first embodiment of the present invention described above is summarized and explained, the arrangement structure of the sealing material of this embodiment includes: a first member 21 having a first facing surface 22; a second member 31, which has a second facing surface 32 opposite to the first facing surface 22, and is formed with a groove portion 35 recessed from the second facing surface 32 and extending in a ring shape; and a closed ring sealing material 110, It is accommodated in the groove 35 and seals between the first member 21 and the second member 31. The second member 31 further has: a groove bottom surface 36 that faces the first facing surface 22 to form the bottom wall of the groove portion 35; and a groove side surface 37 that rises from the groove bottom surface 36 to the second facing surface 32 to form The side wall of the groove 35. The sealing material 110 has a base 11 which is in contact with the first facing surface 22 and the groove bottom surface 36 and a protrusion 12 which protrudes from the base 11 to the groove side surface 37. The protruding part 12 includes a front end 13 positioned away from the groove side surface 37 at the front end protruding to the groove side surface 37. The groove side surface 37 includes an inner circumferential side groove side surface 37 m arranged on the inner circumferential side of the groove portion 35 and an outer circumferential side groove side surface 37 n arranged on the outer circumferential side of the groove portion 35. The base portion 11 is in contact with 37 m of inner circumferential groove side surfaces, which is one of 37 m of inner circumferential side groove side surfaces and 37 n of outer circumferential side groove side surfaces. The protruding portion 12 protrudes from the base portion 11 to the outer circumferential groove side surface 37n, which is the other of the inner circumferential side groove side surface 37m and the outer circumferential side groove side surface 37n. According to the arrangement structure of the sealing material of the first embodiment of the present invention constituted in this way, the mounting performance of the sealing material 110 can be improved and the rolling of the sealing material 110 can be prevented. Since the rolling of the sealing material easily occurs when the diameter of the sealing material is larger (for example, φ400 mm or more), the present invention is particularly effectively used for such a large-diameter sealing material. (Embodiment 2) Fig. 7 is a cross-sectional view showing the step of mounting the sealing material in the groove in the arrangement structure of the sealing material in the second embodiment of the present invention. Fig. 8 is a cross-sectional view showing a state in which the sealing material is installed in the groove in the arrangement structure of the sealing material in the second embodiment of the present invention. Fig. 7 and Fig. 8 are diagrams corresponding to Fig. 2 and Fig. 3 of the first embodiment respectively. The arrangement structure of the sealing material of this embodiment has basically the same structure as the arrangement structure of the sealing material of the first embodiment. Hereinafter, the description of the repeated structure will not be repeated. 7 and 8, the arrangement structure of the sealing material of the present embodiment replaces the sealing material 110 of the first embodiment and has a sealing material 120. The sealing material 120 has a base 11 and a protrusion 12 as its constituent parts. In the present embodiment, the base portion 11 is in contact with the outer circumferential groove side surface 37n, which is one of the inner circumferential side groove side surface 37m and the outer circumferential side groove side surface 37n. When the base 11 is in contact with the outer circumferential groove side surface 37n, a force in the diameter reduction direction acts on the sealing material 120. The protruding portion 12 protrudes from the base portion 11 toward the inner circumferential groove side surface 37m, which is the other of the inner circumferential side groove side surface 37m and the outer circumferential side groove side surface 37n. The protruding portion 12 has a front end portion 13 as its constituent part. The front end portion 13 is provided at the front end of the protruding portion 12 protruding from the base portion 11 toward the inner circumferential groove side surface 37m. The tip portion 13 is positioned away from the inner circumferential groove side surface 37m. According to the arrangement structure of the sealing material in the second embodiment of the present invention constituted in this way, the functions and effects described in the first embodiment can be also exhibited. (Embodiment 3) In this embodiment, various modified examples of the sealing materials of Embodiments 1 and 2 will be described. 9A to 9H are cross-sectional views showing various modification examples of the sealing material of the first embodiment. 10A to 10H are cross-sectional views showing various modification examples of the sealing material of the second embodiment. In Figure 9A~Figure 9H and Figure 10A~Figure 10H, the cross-sectional shape of the sealing material in the unmounted state is shown. As shown in FIGS. 9A, 9B, 10A, and 10B, the protrusion length of the protrusion 12 is not particularly limited. The protruding length of the protruding portion 12 may be less than the diameter of the base portion 11 having a circular cross-section, or may be greater than the diameter of the base portion 11. As shown in FIGS. 9C, 9D, 10C and 10D, the cross-sectional shape of the front end 13 of the protrusion 12 can be a linear shape parallel to the direction opposite to the first facing surface 22 and the groove bottom surface 36, or it can be Sharp shape. As shown in FIGS. 9E to 9H and 10E to 10H, the protrusion 12 may also have the first facing surface 22 and the groove bottom surface 36. The length (thickness) of the protrusion 12 in the direction facing from the base 11 The front end 13 gradually becomes smaller in cross-sectional shape. The cross-sectional shape of the front end 13 of the protrusion 12 can be a sharp shape or a curved shape. According to the arrangement structure of the sealing material of the third embodiment of the present invention constituted in this way, the functions and effects described in the first embodiment can be also exhibited. (Embodiment 4) Fig. 11 is a cross-sectional view showing the step of mounting the sealing material in the groove in the arrangement structure of the sealing material in the fourth embodiment of the present invention. Fig. 12 is a cross-sectional view showing a state in which the sealing material is installed in the groove in the arrangement structure of the sealing material in the fourth embodiment of the present invention. Fig. 11 and Fig. 12 are diagrams corresponding to Fig. 2 and Fig. 3 of the first embodiment, respectively. The arrangement structure of the sealing material of this embodiment has basically the same structure as the arrangement structure of the sealing material of the first embodiment. Hereinafter, the description of the repeated structure will not be repeated. 11 and 12, the arrangement structure of the sealing material of this embodiment replaces the sealing material 110 of the first embodiment and has a sealing material 130. The sealing material 130 has a base 11 and a protrusion 12 as its constituent parts. In this embodiment, the protruding portion 12 is provided at a position closer to the groove bottom surface 36 than the first opposite surface 22 in a direction opposite to the first facing surface 22 and the groove bottom surface 36. The protrusion 12 is compressed and deformed between the first facing surface 22 and the groove bottom surface 36 by the sealing material 130, and is arranged in contact with the groove bottom surface 36. According to this configuration, when the sealing material 130 is attached to the groove portion 35, the protruding portion 12 is arranged at a position further away from the second facing surface 32. Therefore, the protruding part 12 is difficult to protrude from the groove part 35, and the mountability of the sealing material 130 becomes better. According to the arrangement structure of the sealing material of the fourth embodiment of the present invention constituted in this way, the functions and effects described in the first embodiment can be also exhibited. In addition, in this embodiment, in the case where the base 11 is in contact with the inner circumferential groove side surface 37m (Embodiment 1), the configuration in which the protruding portion 12 is provided close to the groove bottom surface 36 is explained, but the base 11 is When it is in contact with the outer groove side surface 37n (Embodiment 2), the protrusion 12 may be provided at a position close to the groove bottom surface 36. (Embodiment 5) In this embodiment, various modified examples of the sealing material of Embodiment 4 will be described. FIGS. 13A to 13F and FIGS. 14A to 14F are cross-sectional views showing various modification examples of the sealing material of the fourth embodiment. In Figures 13A to 13F and Figures 14A to 14F, the cross-sectional shape of the sealing material in the unmounted state is shown. In addition, in FIGS. 13A to 13F, the cross-sectional shape of the sealing material is shown when the base 11 is in contact with the inner groove side surface 37m, and in FIGS. 14A to 14F, the base 11 and the outer groove side surface are shown The cross-sectional shape of the sealing material in contact with 37n. As shown in FIGS. 13A, 13B, 14A, and 14B, the protrusion length of the protrusion 12 is not particularly limited. The protruding length of the protruding portion 12 may be less than the diameter of the base 11 having a circular cross-section, or may be greater than the diameter of the base 11. In the unmounted state, the base 11 and the protrusion 12 may also have a linear cross-section at a position opposite to the groove bottom surface 36. As shown in FIGS. 13C, 13D, 14C, and 14D, the cross-sectional shape of the front end 13 of the protrusion 12 can be a linear shape parallel to the direction opposite to the first facing surface 22 and the groove bottom surface 36, or it can be Sharp shape. As shown in Figure 13E, Figure 13F, Figure 14E and Figure 14F, the protrusion 12 may also have the first facing surface 22 and the groove bottom surface 36. The length (thickness) of the protrusion 12 in the direction opposite to the base 11 The front end 13 gradually becomes smaller in cross-sectional shape. The cross-sectional shape of the front end 13 of the protrusion 12 can be a sharp shape or a curved shape. According to the arrangement structure of the sealing material of the fifth embodiment of the present invention constituted in this way, the functions and effects described in the first embodiment can be exerted in the same manner. The arrangement structure of the sealing material according to the present invention is provided with: a first member having a first opposed surface; a second member having a second opposed surface facing the first opposed surface and formed from the second opposed surface A groove portion with a recessed surface and extending in a ring shape; and a sealing material of a closed ring, which is accommodated in the groove portion and seals between the first member and the second member. The second member further has: a groove bottom surface facing the first opposite side to form the bottom wall of the groove portion; and groove side surfaces rising from the groove bottom surface to the second opposite surface to form the side wall of the groove portion. The sealing material has a base that is in contact with the first facing surface and the bottom surface of the groove, and a protrusion that protrudes from the base to the side surface of the groove. The front end of the protruding portion protruding to the side surface of the groove includes a front end portion positioned away from the side surface of the groove. The groove side surface includes an inner circumferential groove side surface arranged on the inner circumferential side of the groove portion and an outer circumferential side groove side surface arranged on the outer circumferential side of the groove portion. The base is in contact with any one of the inner circumferential side groove side surface and the outer circumferential side groove side surface. The protruding portion protrudes from the base to either the inner circumferential side groove side surface and the outer circumferential side groove side surface. According to the arrangement structure of the sealing material constructed in this way, when a force acts to rotate the base part in the direction of the sealing material, the protruding part abuts against the first facing surface or the bottom surface of the groove to prevent the sealing material from rolling. In addition, since the base part contacts the groove side surface on the side opposite to the side where the protrusion part protrudes to the groove side surface, it is difficult for the protrusion part to protrude from the groove part when the sealing material is attached to the groove part. As a result, the mounting performance of the sealing material can be improved. It is also preferable that the base portion is cut by a plane orthogonal to the tangential direction of the closed-loop sealing material in a state where the force is not applied to the sealing material from the first and second members. It has a curved shape at a position facing the first facing surface and the groove bottom surface. According to the arrangement structure of the sealing material constructed in this way, it is possible to suppress the generation of excessive internal stress in the sealing material during the period before the protrusion abuts on the first facing surface or the bottom surface of the groove. It is also preferable that the base portion is cut by a plane orthogonal to the tangential direction of the closed-loop sealing material in a state where the force is not applied to the sealing material from the first and second members. It has a curved shape at a position facing either one of the inner circumferential side groove side surface and the outer circumferential side groove side surface. According to the arrangement structure of the sealing material constructed in this way, it is possible to suppress the generation of excessive internal stress in the sealing material during the period before the protrusion abuts on the first facing surface or the bottom surface of the groove. It is also preferable that the protrusions are provided over the entire circumference of the sealing material. According to the arrangement structure of the sealing material constructed in this way, the rolling of the sealing material can be prevented more reliably. It is also preferable that the protruding portion is arranged at a position closer to the bottom surface of the groove than the first opposite surface in a direction in which the first opposite surface and the groove bottom face face to face. According to the arrangement structure of the sealing material structured in this way, when the sealing material is attached to the groove part, it is difficult for the protrusion part to protrude further from the groove part. It is also preferable that a fluid space accompanied by pressure pulsation is formed on the inner peripheral side or the outer peripheral side of the sealing material. According to the arrangement structure of the sealing material constructed in this way, even if a slight reciprocating sliding occurs between the first member and the second member due to the pressure pulsation of the fluid space, the sealing material can be prevented from rolling. It should be considered that the embodiments disclosed this time are illustrative in all aspects and not restrictive. The scope of the present invention is not shown by the above description but by the scope of patent application, and intends to include all changes within the meaning and scope equivalent to the scope of patent application. [Industrial Applicability] The present invention is suitable for the arrangement and structure of the sealing material that acts like oil pressure or air pressure.

11‧‧‧Base 12‧‧‧Protrusion 13‧‧‧Front end 21‧‧‧First member 22‧‧‧First facing surface 31‧‧‧Second member 32‧‧‧Second facing surface 35 ‧‧‧Groove 36‧‧‧Groove bottom surface 37‧‧‧Groove side surface 37m‧‧‧Inner circumferential side groove side 37n‧‧‧Outer circumferential side groove side 110‧‧‧Sealing material 120‧‧‧Sealing material 130‧‧‧ Sealing material

Figure 1 shows a top view of the sealing material. Fig. 2 is a cross-sectional view showing the steps of installing the sealing material in Fig. 1 on the groove. Fig. 3 is a cross-sectional view showing a state where the sealing material in Fig. 1 is installed in the groove. 4 is a cross-sectional view showing the deformation of the sealing material when the first member in FIG. 3 reciprocates sliding. 5 is a cross-sectional view showing the deformation of the sealing material when the first member in FIG. 3 reciprocates sliding. 6 is a cross-sectional view showing a variation of the shape of the groove shown in FIG. 2. Fig. 7 is a cross-sectional view showing the step of installing the sealing material in the groove in the arrangement structure of the sealing material in the second embodiment of the present invention. Fig. 8 is a cross-sectional view showing a state in which the sealing material is installed in the groove in the arrangement structure of the sealing material in the second embodiment of the present invention. Fig. 9A is a cross-sectional view showing various modifications of the sealing material of the first embodiment. Fig. 9B is a cross-sectional view showing various modifications of the sealing material of the first embodiment. Fig. 9C is a cross-sectional view showing various modifications of the sealing material of the first embodiment. Fig. 9D is a cross-sectional view showing various modifications of the sealing material of the first embodiment. Fig. 9E is a cross-sectional view showing various modifications of the sealing material of the first embodiment. Fig. 9F is a cross-sectional view showing various modifications of the sealing material of the first embodiment. 9G is a cross-sectional view showing various modifications of the sealing material of Embodiment 1. Fig. 9H is a cross-sectional view showing various modifications of the sealing material of the first embodiment. 10A is a cross-sectional view showing various modification examples of the sealing material of the second embodiment. 10B is a cross-sectional view showing various modifications of the sealing material of the second embodiment. 10C is a cross-sectional view showing various modifications of the sealing material of the second embodiment. 10D is a cross-sectional view showing various modifications of the sealing material of the second embodiment. 10E is a cross-sectional view showing various modifications of the sealing material of the second embodiment. 10F is a cross-sectional view showing various modifications of the sealing material of the second embodiment. 10G is a cross-sectional view showing various modifications of the sealing material of the second embodiment. 10H is a cross-sectional view showing various modifications of the sealing material of the second embodiment. 11 is a cross-sectional view showing the step of installing the sealing material in the groove in the arrangement structure of the sealing material in the fourth embodiment of the present invention. Fig. 12 is a cross-sectional view showing a state in which the sealing material is installed in the groove in the arrangement structure of the sealing material in the fourth embodiment of the present invention. Fig. 13A is a cross-sectional view showing various modifications of the sealing material of the fourth embodiment. Fig. 13B is a cross-sectional view showing various modifications of the sealing material of the fourth embodiment. Fig. 13C is a cross-sectional view showing various modifications of the sealing material of the fourth embodiment. Fig. 13D is a cross-sectional view showing various modifications of the sealing material of the fourth embodiment. Fig. 13E is a cross-sectional view showing various modifications of the sealing material of the fourth embodiment. Fig. 13F is a cross-sectional view showing various modifications of the sealing material of the fourth embodiment. 14A is a cross-sectional view showing various modification examples of the sealing material of the fourth embodiment. 14B is a cross-sectional view showing various modification examples of the sealing material of the fourth embodiment. 14C is a cross-sectional view showing various modification examples of the sealing material of the fourth embodiment. 14D is a cross-sectional view showing various modification examples of the sealing material of the fourth embodiment. Fig. 14E is a cross-sectional view showing various modifications of the sealing material of the fourth embodiment. Fig. 14F is a cross-sectional view showing various modifications of the sealing material of the fourth embodiment.

11‧‧‧Base

12‧‧‧Protrusion

13‧‧‧Front end

21‧‧‧The first member

22‧‧‧The first opposite surface

31‧‧‧Second member

32‧‧‧The second opposite surface

35‧‧‧Slot

36‧‧‧Slot bottom

37‧‧‧Slot side

37m‧‧‧Inner circumferential side groove side

37n‧‧‧Side surface of peripheral side groove

110‧‧‧Sealing material

Claims (6)

An arrangement structure of a sealing material, comprising: a first member having a first opposing surface; a second member having a second opposing surface facing the first opposing surface, and forming a second opposing surface from the second A groove portion recessed toward the surface and extending in a ring shape; and a sealing material of a closed ring that is accommodated in the groove portion and seals between the first member and the second member; and the second member further has: a groove bottom surface , Which faces the first opposite side and forms the bottom wall of the groove portion; and groove side surfaces, which rise from the bottom surface of the groove toward the second opposite surface to form the side wall of the groove portion; the sealing material has: a base , Which is in contact with the first facing surface and the bottom surface of the groove; and a protrusion, which protrudes from the base to the side surface of the groove; the protrusion is a front end that protrudes to the side surface of the groove including the front end that is positioned away from the side surface of the groove The groove side surface includes the inner circumferential side groove side surface arranged on the inner circumferential side of the groove portion and the outer circumferential side groove side surface arranged on the outer circumferential side of the groove portion; the base part is the inner circumferential side groove side surface and the outer circumferential side Any one of the groove side surfaces is in contact with one of the groove sides; the protrusion protrudes from the base to the other groove side of the other of the inner circumferential groove side and the outer circumferential groove side; and the protrusion is attached to The front end protruding to the side surface of the other groove includes a front end portion positioned away from the side surface of the other groove. Such as the arrangement structure of the sealing material of claim 1, in which the force is not applied to the sealing material from the above-mentioned first member and the above-mentioned second member, by a plane orthogonal to the tangential direction of the closed-loop sealing material When cutting the sealing material, the base has a curved shape at a position facing the first facing surface and the groove bottom surface. Such as the arrangement structure of the sealing material of claim 1 or 2, in which the force is not applied to the sealing material from the first member and the second member, by orthogonal to the tangential direction of the closed ring sealing material When the sealing material is cut in a plane, the base portion has a curved shape at a position opposed to any one of the inner circumferential groove side surface and the outer circumferential groove side surface. Such as the arrangement structure of the sealing material of claim 1 or 2, wherein the protruding part is provided over the entire circumference of the sealing material. Such as the arrangement structure of the sealing material of claim 1 or 2, wherein the protruding portion is provided in a direction in which the first facing surface and the groove bottom face, and is located closer to the groove bottom surface than the first facing surface. The arrangement structure of the sealing material of claim 1 or 2, wherein a fluid space accompanied by pressure pulsation is formed on the inner or outer peripheral side of the sealing material.

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