JP6643857B2 - gasket - Google Patents

Description

  The present invention relates to a gasket formed of a rubber-like elastic body that seals a gap between two opposing members.

  Conventionally, in order to seal a gap between two opposing members with a gasket formed of a rubber-like elastic body, a mounting groove for mounting a gasket on one member such as a housing is formed. A gasket is mounted, and the space between the groove bottom of the mounting groove and the surface of the other member such as the cover member is crushed along the depth direction of the mounting groove so as to be tightly sealed.

  The mounting groove for mounting such a gasket is designed such that the gasket does not fill the inside of the mounting groove due to crushing of the gasket along the depth direction of the mounting groove. Therefore, when the gasket is mounted in the mounting groove, the gasket is not held in the mounting groove, and there is a problem that the gasket falls off from the mounting groove when the housing is tilted or turned upside down. .

  In view of this, a gasket has been proposed in which at least one end in the width direction of the gasket is provided with a projection that abuts on the side wall of the mounting groove during mounting to prevent the gasket from dropping out of the mounting groove (for example, Patent Document 1).

JP 2006-329400 A

  By the way, in recent years, high performance of various devices has been demanded, and as one of the high performance of various devices, an improvement in mountability in a mounting groove and an improvement in prevention of falling off from the mounting groove have been demanded. I have.

  The present invention has been made in view of such a point, and an object of the present invention is to provide a gasket that can easily improve the mounting property and the fall prevention property.

In order to solve the above-mentioned problem, a gasket of the present invention is mounted on a mounting groove provided in at least one of two opposing members, and a rubber-like elastic body that seals a gap between the two members. A gasket formed, wherein the gasket body is higher than the depth of the mounting groove, narrower than the groove width of the mounting groove, and is mounted over the entire length of the mounting groove; and In order to prevent the mounted gasket main body from dropping out of the mounting groove, a drop-out preventing projection projecting from each side of the width direction of the gasket main body, and mounting the gasket main body in the mounting groove. sometimes, in order to prevent the change in shape as the gasket body falls down, it has a prevention protrusion fallen which project respectively on both sides in the width direction of the gasket body The gasket main body includes a base having a first sealing surface capable of being in close contact with a groove bottom of the mounting groove disposed in the mounting groove, the base having a generally rectangular cross section, and the mounting groove of the base. And a tip portion narrower than a width of the base portion having a second sealing surface capable of being in close contact with the other member of the two members disposed on the upper surface located on the opening side of the base member. The base portion is formed such that the falling-off preventing protrusion portion extends inclining so as to increase in width toward a side wall of the mounting groove from both sides in the width direction of the first seal surface to the upper surface. Are protruded on both sides in the width direction of the mounting groove, the ends of which are formed so as to be able to abut against the side walls of the mounting groove with interference, and in the mounted state, the front ends contact the side walls of the mounting groove. With respect to the direction coming out of the mounting groove It is formed so as to be elastically deformed like a hook of a hook so as to have a large resistance, and the projection for preventing the fall is provided in the mounting groove from the upper surface of the base along the depth direction of the mounting groove. The projections are provided on both sides in the width direction of the distal end so as to extend toward the member side .

And, by adopting such a configuration, the projection for preventing falling and the projection for preventing falling both the falling off of the gasket main body and the shape deformation due to the falling of the gasket main body when mounting the gasket in the mounting groove. Therefore, the gasket main body can be securely mounted in the mounting groove, and the gasket main body can be reliably prevented from dropping out of the mounting groove. As a result, it is possible to reliably improve the mountability in the mounting groove and the prevention of falling off from the mounting groove. Further, the falling-off preventing projection is formed so that its tip is inclined and widens toward the side wall of the mounting groove between both sides in the width direction of the first sealing surface and the upper surface. Therefore, the work of inserting the gasket into the mounting groove can be simplified, and in the mounting state where the gasket is mounted in the mounting groove, the tip of the projection for preventing falling off comes into contact with the side wall of the mounting groove with interference. It is formed so as to be elastically deformed like a barb of a hook so that, in the mounted state, the tip abuts against the side wall 3a of the mounting groove 3 and has a large resistance in a direction of coming out of the mounting groove 3. Since it is formed, it is elastically deformed in the mounted state so that the tip abuts against the side wall of the mounting groove and has a large resistance in the direction of coming out of the mounting groove. To hardly more escape from the mounting groove, it can exert more reliable falling-off preventing function. In addition, the projection for preventing falling does not contact the side wall of the mounting groove when mounting the gasket in the mounting groove, and also increases the length of the side surface facing the side wall of the mounting groove at the base to increase rigidity. As a result, the gasket main body can be prevented from falling down in the mounting groove, that is, the shape of the gasket main body can be reliably held, so that the operation of inserting the gasket into the mounting groove can be simplified.

  Further, in the present invention, the falling-off preventing projection and the falling-off preventing projection may be provided individually or as a set. By adopting such a configuration, the fall-off prevention projection prevents the gasket main body from falling out of the mounting groove, and the fall-off prevention projection prevents the gasket main body from deforming due to the fall of the gasket main body. And the deformation prevention function can be generated individually or as a set. Furthermore, by providing the projection for preventing falling and the projection for preventing falling as a set, compared to the case where the projection for preventing falling and the projection for preventing falling are separately provided, it is easier to insert the gasket into the mounting groove. Instead, the performance of preventing falling off and shape deformation can be easily increased.

  Still further, in the present invention, the set of the falling-off preventing protrusion and the falling-off preventing protrusion is formed by arranging the falling-off preventing protrusion at a tip portion located immediately above the falling-off preventing protrusion. Configuration can be adopted. By adopting such a configuration, the falling-off preventing protrusion and the falling-off preventing protrusion can be easily and reliably set as a set, and the falling-off preventing protrusion fits into the tighter mounting groove. Therefore, it is possible to make it harder to come off.

  Also, in the present invention, a plurality of individual drop-off preventing protrusions and a plurality of individual fall-down preventing protrusions are provided at predetermined intervals along the longitudinal direction of the mounting groove. Configuration. And, by adopting such a configuration, the reaction force due to the elastic deformation by the falling-off preventing projections can be individually generated at a plurality of locations along the longitudinal direction of the mounting groove, and the falling-off preventing projections The deformation preventing function can be individually generated at a plurality of locations along the longitudinal direction of the mounting groove. Therefore, it is possible to more reliably improve the mountability in the mounting groove and the prevention of falling off from the mounting groove.

  Further, in the present invention, the individual ones of the falling-off preventing projections and the individual ones of the falling-off preventing projections are alternately arranged at predetermined intervals along the longitudinal direction of the mounting groove. Configuration. By adopting such a configuration, the falling-off preventing function by the falling-off preventing protrusion and the falling-off preventing function by the falling-off preventing protrusion can be arranged in a balanced manner along the longitudinal direction of the mounting groove. Therefore, it is possible to more reliably improve the mountability in the mounting groove and the prevention of falling off from the mounting groove.

  Still further, in the present invention, a plurality of sets of the falling-off preventing protrusions and the falling-down preventing protrusions may be provided along a longitudinal direction of the mounting groove. By adopting such a configuration, the falling-off preventing function by the falling-off preventing protrusion and the deformation preventing function by the falling-off preventing protrusion can be generated in a set at a plurality of locations along the longitudinal direction of the mounting groove. Therefore, it is possible to more reliably improve the mountability in the mounting groove and the prevention of falling off from the mounting groove.

  Further, in the present invention, a separate one of the drop-out preventing protrusions and a set of the drop-out preventing protrusions and the set of the fall-down preventing protrusions are respectively set in advance along the longitudinal direction of the mounting groove. It is possible to adopt a configuration in which a plurality are provided at given intervals. By adopting such a configuration, the drop-out prevention function can be individually generated at a plurality of locations along the longitudinal direction of the mounting groove by the individual drop-out prevention projections, and the set drop-out prevention function is provided. The drop-out prevention function and the deformation prevention function by the prevention projection and the fall prevention projection can be generated as a set at multiple locations along the longitudinal direction of the mounting groove. The function and the deformation preventing function can be reliably exhibited.

  Further, in the present invention, a separate one of the fall prevention protrusions and a set of the fall prevention protrusions and the set of the fall prevention protrusions are respectively set in advance along the longitudinal direction of the mounting groove. It is possible to adopt a configuration in which a plurality are provided at an interval. And, by adopting such a configuration, the deformation preventing function can be individually generated at a plurality of locations along the longitudinal direction of the mounting groove by the individual fall prevention projections, and the set falling The drop-out prevention function and the deformation prevention function by the prevention projection and the fall prevention projection can be generated as a set at multiple locations along the longitudinal direction of the mounting groove. The function and the deformation preventing function can be reliably exhibited.

  Still further, in the present invention, the individual projections for the fall prevention, the individual projections for the fall prevention, and the set of the projections for the fall prevention and the projections for the fall prevention are provided. A plurality may be provided at predetermined intervals along the longitudinal direction of the mounting groove. And, by adopting such a configuration, the drop-out prevention function can be individually generated at a plurality of locations along the longitudinal direction of the mounting groove by the individual drop-out prevention projections, and the individual fall-down prevention The protrusions allow the deformation prevention function to be individually generated at multiple locations along the length of the mounting groove. Further, the set-off prevention protrusions and the fall-prevention protrusions prevent the fall-off function and the deformation prevention. Since the function can be generated as a set at a plurality of locations along the longitudinal direction of the mounting groove, the falling-off preventing function and the deformation preventing function can be more reliably exhibited according to the planar shape of the mounting groove. Further, since two types having different performances can be provided for the drop-preventing property and the shape deformation-preventing property, the adaptability to the planar shape of the mounting groove can be easily improved.

  ADVANTAGE OF THE INVENTION According to the gasket of this invention, there exists an outstanding effect that the improvement of the mounting property to a mounting groove and the improvement of the fall prevention property from a mounting groove can be achieved more reliably.

1 is a schematic plan view showing a first embodiment of a gasket according to the present invention. 1A is a schematic enlarged cross-sectional view taken along line AA of FIG. 1, FIG. 1B is a schematic enlarged cross-sectional view showing a mounted state in which the gasket is mounted in a mounting groove, FIG. c) is a schematic enlarged sectional view showing a sealed state in which a gap between two members is sealed. 1A is a schematic enlarged cross-sectional view taken along the line BB of FIG. 1, and FIG. 1B is a schematic enlarged cross-sectional view showing a mounting state of the mounting groove. Figure 1A is a schematic enlarged cross-sectional view taken along the line CC of FIG. 1, and FIG. 1B is a schematic enlarged cross-sectional view showing a mounted state in a mounting groove. Figure FIG. 4 is a schematic plan view showing a main part of a second embodiment of the gasket according to the present invention. 5A and 5B show a main part of the gasket of FIG. 5, wherein FIG. 5A is a schematic enlarged external perspective view of a projection for preventing falling and falling of FIG. 5, and FIG. FIG. 5C is a schematic enlarged cross-sectional view taken along line DD in FIG.

  Hereinafter, the present invention will be described with reference to embodiments shown in the drawings.

  1 to 5 show a first embodiment of a gasket according to the present invention. The gasket 1 of the present embodiment is mounted in an annular mounting groove 3 provided in a housing 2 as one of two members facing each other, and the mounting groove 3 and the other member of the two members. To seal between the cover member 4 and the surface of the cover member 4.

  As shown in FIG. 1, the gasket 1 of the present embodiment is formed as a whole by a rubber-like elastic body exhibiting rubber elasticity such as a synthetic rubber or a thermoplastic elastomer, and is formed in an annular shape having a substantially rectangular frame shape as a whole. It has a gasket body 10, a projection 20 for preventing falling off, and a projection 30 for preventing falling. Further, each of the falling-off preventing protrusion 20 and the falling-off preventing protrusion 30 is provided separately from the gasket main body 10.

  The gasket main body 10 is for sealing the gap between the two members, is mounted over the entire length of the mounting groove 3, and has a sectional shape higher than the depth of the mounting groove 3, as shown in FIG. , Are formed to be narrower than the groove width of the mounting groove 3. Furthermore, the gasket main body 10 is disposed on an annular base 11 having a rectangular cross section as a whole and on the upper surface of the base 11 located on the cover member 4 side, and has a width smaller than the width of the base 11. And an annular distal end portion 12 formed in a chevron cross section. The top of the tip portion 12 is formed in an arc shape whose cross section is upwardly convex. The planar shape of the gasket main body 10 is set according to the planar shape of the mounting groove 3, and may be a shape such as a straight line, an arc, or the like, which simply divides an area, instead of an annular shape.

  The base 11 is arranged in the mounting groove 3 when the gasket 1 shown in FIG. 2B is mounted in the mounting groove 3. The width dimension shown in the left-right direction in FIG. In the mounted state, each of the two side surfaces (the inner peripheral surface and the outer peripheral surface) shown on the left and right of FIG. 2 and the mounting groove 3 facing each other in the mounted state. A clearance can be formed between the side wall 3a. The height of the base 11 in the vertical direction in FIG. 2 is shorter than the depth of the mounting groove 3, and is shown below the base 11 in FIG. The bottom surface is in contact with the groove bottom 3 b of the mounting groove 3, and the upper surface of the base 11 is arranged at a substantially middle position in the depth direction of the mounting groove 3. The bottom surface of the base portion 11 is a first sealing surface 11a which is in elastic contact with the groove bottom 3b of the mounting groove 3 in a sealed state in which the gap between the two members shown in FIG. Note that the first sealing surface 11a may have a downwardly convex arc shape.

  The width of the base of the tip 12 is smaller than the width of the base 11, and the widthwise middle position of the tip 12 is located above the widthwise middle of the base 11. ing. The upper end of the distal end portion 12 shown in FIG. 2 protrudes above the opening end of the mounting groove 3 in the mounted state, and elastically deforms along the surface of the cover member 4 in the sealed state to cover the cover member 4. The second sealing surface 12a is in elastic contact with the surface of the second sealing surface. The second seal surface 12a may be flat. In addition, the cross-sectional shape of the distal end portion 12 may be a rectangle whose top is an arc that is upwardly convex, a triangle that is upwardly convex, or a mountain that has a flat top.

  The drop-off preventing projections 20 are for preventing the gasket main body 10 mounted in the mounting groove 3 from dropping out of the mounting groove 3, and as shown in FIG. The base 11 protrudes from both sides in the width direction so as to extend obliquely so as to increase in width toward the side wall 3 a of the mounting groove 3 from both sides. The falling-off preventing projection 20 is formed such that its tip abuts on the side wall 3a of the mounting groove 3 with a preset interference in the mounting state shown in FIG. In addition, in the mounted state, the tip portion of the drop-off preventing projection 20 is elastically deformed inward in the width direction and elastically contacts the side wall 3 a of the mounting groove 3 to be housed in the mounting groove 3. It has become so.

  Further, the outer periphery of the upper surface of the falling-off preventing projection 20 is formed in a planar arc shape, and the upper surface is arranged at the same height position as the upper surface of the base 11. Further, as shown in FIG. 1, the drop-off preventing projections 20 are provided on both sides in the width direction of the base 11 at predetermined intervals along the circumferential direction of the gasket main body 10, that is, along the longitudinal direction of the mounting groove 3. In the present embodiment, there are a plurality, and nine are provided. It is preferable that the intervals between the drop-off preventing protrusions 20 are equal intervals in the sense that a stable drop-off preventing effect can be easily obtained. The falling-off preventing projection 20 may be provided only on the outer peripheral surface of the base 11, may be provided only on the inner peripheral surface of the base 11, or may be provided on the outer peripheral surface, depending on the peripheral length of the gasket 1. It may be provided alternately on each of the inner peripheral surfaces.

  The protrusion 30 for preventing the gasket from being deformed so that the gasket main body 10 falls down when the gasket main body 10 is mounted in the mounting groove 3 is used as shown in FIG. The front end portion 12 is provided on both sides in the width direction of the mounting portion 3 so as to extend from the upper surface of the mounting portion 3 toward the cover member 4 along the depth direction of the mounting groove 3. Further, in the mounting state shown in FIG. 4B, the projection 30 for preventing the fall can form a clearance between the side wall 3a of the mounting groove 3 and the opposing side. Further, the fall prevention projection 30 extends upward from the upper surface of the base 11 in the height direction, that is, in the depth direction of the mounting groove 3.

  The outer periphery of the upper surface of the fall prevention projection 30 is formed in a plane arc shape, and the upper end position is disposed below the opening end of the mounting groove 3 and is directed outward in the width direction on the side surface of the tip portion 12. It is protruding. Further, as shown in FIG. 1, the fall prevention projections 30 are provided at predetermined intervals along the circumferential direction of the gasket main body 10, that is, along the longitudinal direction of the mounting groove 3 on both sides in the width direction of the gasket main body 10. In the present embodiment, there are a plurality, and nine are provided. It is preferable that the intervals between the fall prevention protrusions 30 be equal intervals in the sense that a stable fall prevention effect can be easily obtained. Note that, depending on the circumferential length of the gasket 1, the protrusion 30 for preventing falling may be provided only on the outer peripheral surface of the distal end portion 12, may be provided only on the inner peripheral surface of the distal end portion 12, or may be provided on the outer peripheral surface. The surface and the inner peripheral surface may be provided alternately.

  As shown in FIG. 1, the gasket 1 of the present embodiment has nine falling-off preventing projections 20 and nine falling-off preventing projections 30 alternately arranged at equal intervals on both sides in the width direction of the gasket main body 10. Have been.

  As is well known, the gasket 1 of the present embodiment is formed to be higher than the depth of the mounting groove 3 and narrower than the groove width of the mounting groove 3, and does not fill the inside of the mounting groove 3 in a sealed state. It is formed as follows.

  Next, the operation of the present embodiment having the above-described configuration will be described.

  According to the gasket 1 of the present embodiment, since the gasket main body 10 is higher than the depth of the mounting groove 3 and narrower than the groove width of the mounting groove 3, the width direction side surface of the gasket main body 10 is mounted at the time of mounting. 3 does not come into contact with the side wall 3a, so that the gasket 1 can be smoothly mounted, and the gasket 1 can be sandwiched between the two members in the sealed state, so that a good sealed state can be obtained.

  Further, according to the gasket 1 of the present embodiment, the falling-off preventing projections 20 and the falling-down preventing projections 30 cause the gasket main body 10 to fall off and the gasket main body 10 to fall when the gasket 1 is mounted in the mounting groove 3. Therefore, the gasket main body 10 can be securely mounted in the mounting groove 3, and the gasket main body 10 can be reliably prevented from dropping out of the mounting groove 3. Thereby, it is possible to surely improve the mountability to the mounting groove 3 and the prevention of falling off from the mounting groove 3.

  Furthermore, according to the gasket 1 of the present embodiment, the falling-off preventing projections 20 are inclined such that the tips become wider from both sides in the width direction of the first sealing surface 11a toward the side walls 3a of the mounting groove 3. Since it is formed so as to extend, the resistance at the time of mounting is small, and the operation of inserting the gasket 1 into the mounting groove 3 can be simplified. Since the tip of the preventive projection 20 is formed so as to abut against the side wall 3a of the mounting groove 3 with an interference, in the mounted state, the tip abuts on the side wall 3a of the mounting groove 3 and comes out of the mounting groove 3. Since the elastic member is elastically deformed so as to have a large resistance to it, it acts like a return of the fishhook and becomes harder to fall out of the mounting groove 3, so that a more reliable falling-off preventing function can be exhibited.

  Further, according to the gasket 1 of the present embodiment, when the gasket 1 is mounted in the mounting groove 3, the projection 30 for preventing the fall does not contact the side wall 3 a of the mounting groove 3, and the mounting groove 3 of the base 11. To increase the rigidity by increasing the length of the side surface facing the side wall 3a, so that the gasket main body 10 is prevented from falling down in the mounting groove 3, that is, the shape of the gasket main body 10 is securely held. Therefore, the operation of inserting the gasket 1 into the mounting groove 3 can be simplified. In addition, the projection 30 for prevention of the fall of this embodiment can also exhibit the function of preventing the gasket main body 10 from being twisted in the mounting groove 3 at the time of mounting.

  Still further, according to the gasket 1 of the present embodiment, the falling-off preventing protrusion 20 and the falling-down preventing protrusion 30 are respectively set in advance in the circumferential direction of the gasket main body 10, that is, along the longitudinal direction of the mounting groove 3. Since nine protrusions are provided at intervals, the reaction force due to the elastic deformation of the tip of the drop-off preventing projection 20 in the mounted state can be generated at nine places along the longitudinal direction of the mounting groove 3 and the mounting can be performed. The function of preventing the gasket main body 10 from being deformed by the projection portion 30 for preventing falling at the time can be generated at nine places along the longitudinal direction of the mounting groove 3. Therefore, it is possible to more reliably improve the mountability in the mounting groove 3 and the prevention of falling off from the mounting groove 3.

  Further, according to the gasket 1 of the present embodiment, the falling-off preventing projections 20 and the falling-down preventing projections 30 are arranged at predetermined intervals along the circumferential direction of the gasket main body 10, that is, along the longitudinal direction of the mounting groove 3. Since they are alternately arranged, the falling-off preventing function by the falling-off preventing projections 20 and the falling-off preventing function by the falling-off preventing protrusions 30 can be arranged in a well-balanced manner along the longitudinal direction of the mounting groove 3. Therefore, it is possible to more reliably improve the mountability in the mounting groove 3 and the prevention of falling off from the mounting groove 3.

  5 and 6 show a second embodiment of the gasket according to the present invention. The gasket 1A of the present embodiment includes a gasket main body 10 of the gasket 1 of the first embodiment described above, a drop-off prevention projection 20A similar to the drop-prevention protrusion 20 of the gasket 1 of the first embodiment described above, and the above-described gasket 1A. A set 30A of the protrusion 30A for preventing fall similar to the protrusion 30 for preventing fall of the gasket 1 of the first embodiment is provided. The set-off prevention projection 20A and the fall-prevention protrusion 30A (hereinafter, for convenience of description, the fall-prevention protrusion 20A and the fall-prevention protrusion 30A are collectively referred to as a “drop-off / fall prevention protrusion”. 40 ") is configured by arranging a fall-preventing projection 30A on the distal end portion 12 located immediately above the falling-off preventing projection 20A.

  In the present embodiment, a plurality of, in this embodiment, nine drop-out / fall-prevention protrusions 40 are provided at predetermined intervals along the circumferential direction of the gasket main body 10, that is, along the longitudinal direction of the mounting groove 3. The spacing between the drop-off / fall-prevention protrusions 40 depends on the planar shape of the mounting groove 3, but is preferably set at equal intervals from the viewpoint that a stable drop-prevention effect can be easily obtained. The projections 40 for preventing falling and falling may be provided only on the outer peripheral surface of the base 11, may be provided only on the inner peripheral surface of the base 11, or may be alternately provided on the outer peripheral surface and the inner peripheral surface. May be provided. Other configurations are the same as those of the gasket 1 of the above-described first embodiment, and a detailed description thereof will be omitted.

  According to the gasket 1A of this embodiment having such a configuration, the same effects as those of the gasket 1 of the above-described first embodiment can be obtained, and at the same time, the falling-off preventing projections that constitute a part of the falling-off / fall-preventing projections 40 can be obtained. Since the portion 20A fits more tightly into the mounting groove 3, it becomes more difficult to come off. Therefore, the gasket 1A can be surely further prevented from falling off the mounting groove 3.

  The falling-off / falling-preventing projections 40 may be arranged in combination with the falling-off-preventing projections 20 provided individually in the gasket 1 of the first embodiment described above, or may be arranged in the first embodiment described above. The gasket 1 may be arranged in combination with the individually provided fall-preventing projections 30, or the gasket 1 of the first embodiment may be provided with the separately-provided projection-preventing projections 20 and the separately provided projections 20. You may arrange | position in combination with the projection part 30 for fall prevention. Note that the configuration of the combination can be changed as necessary such as a design concept. In addition, as an arrangement when combined, for example, the drop-out / fall-prevention projections 40 and the drop-out prevention projections 20 are alternately arranged, or the drop-down / fall prevention projections 40 and the fall prevention projections 30 are arranged. May be alternately arranged, or the falling-off / falling prevention projection 40, the falling-off prevention projection 20, and the falling-prevention projection 30A may be repeatedly arranged in this order.

  When the drop-off / fall-prevention protrusions 40 and the drop-prevention protrusions 20 are arranged in combination, the drop-out prevention function provided by the individual drop-out prevention protrusions 20 is provided along the longitudinal direction of the mounting groove 3. It can be generated individually at a location, and the drop-out / fall-prevention projection 40 has a drop-prevention function and a deformation-prevention function at a position where the drop-prevention projection 20 is not disposed along the longitudinal direction of the mounting groove 3. Since it can be generated in a set at a plurality of places, the falling-off preventing function and the deformation preventing function can be reliably exhibited according to the planar shape of the mounting groove 3.

  When the drop-off / fall-prevention protrusions 40 and the fall-prevention protrusions 30 are arranged in combination, the deformation prevention function of the individual fall-prevention protrusions 30 is provided at a plurality of positions along the longitudinal direction of the mounting groove. At the position where the fall-preventing projection 30 is not disposed, and a plurality of fall-prevention and deformation-prevention functions of the fall-down / fall-prevention projection 40 are provided along the longitudinal direction of the mounting groove 3. Since it can be generated as a set at a location, the falling-out preventing function and the deformation preventing function can be reliably exhibited according to the planar shape of the mounting groove 3.

  Furthermore, when the drop-off / fall-prevention protrusion 40, the drop-prevention protrusion 20 and the fall-prevention protrusion 30 are arranged in combination, the drop-out prevention function is provided by the individual drop-prevention protrusion 20. 3 can be individually generated at a plurality of locations along the longitudinal direction, and the individual fall prevention projections 30 can individually generate a deformation preventing function at a plurality of locations along the longitudinal direction of the mounting groove. In addition, the drop-out / fall-prevention projection 40 has a drop-preventing function and a deformation-preventing function. Since it can be generated as a set at a plurality of locations, the falling-out preventing function and the deformation preventing function can be more reliably exhibited according to the planar shape of the mounting groove 3. In addition, since two types having different performances can be provided for the drop-prevention property and the shape deformation prevention property, the adaptability to the planar shape of the mounting groove 3 can be easily improved.

  Note that the present invention is not limited to the above-described embodiments, and various modifications can be made as necessary.

DESCRIPTION OF SYMBOLS 1, 1A Gasket 2 Housing 3 Mounting groove 3a Side wall 3b Groove bottom 4 Cover member 10 Gasket main body 11 Base 11a First sealing surface 12 Tip 12a Second sealing surface 20, 20A Fall-off prevention protrusion 30, 30A Fall-down prevention protrusion Part 40 Projection for falling and falling prevention

Claims (9)

A gasket formed of a rubber-like elastic body that is mounted in a mounting groove provided in at least one of the two members facing each other and seals a gap between the two members,
A gasket body that is higher than the depth of the mounting groove and narrower than the groove width of the mounting groove, and is mounted over the entire length of the mounting groove,
In order to prevent the gasket main body mounted in the mounting groove from dropping out of the mounting groove, a drop-off prevention projection projecting from each side of the gasket main body in the width direction,
At the time of mounting the gasket main body in the mounting groove, in order to prevent the gasket main body from being deformed so as to fall down, to prevent the gasket main body from falling over, both sides in the width direction of the gasket main body, Has,
The gasket main body includes a base having a first sealing surface capable of being in close contact with a groove bottom of the mounting groove disposed in the mounting groove, the base having a generally rectangular cross section, and the mounting groove of the base. And a tip portion narrower than a width of the base portion having a second sealing surface capable of being in close contact with the other member of the two members disposed on the upper surface located on the opening side of the base member. And
The falling-off prevention protrusion is inclined from the both sides in the width direction of the first seal surface to the upper surface so as to extend toward the side wall of the mounting groove so as to increase in width. both sides are protruded respectively, together being contactable with formed with interference on the side wall of the tip of the mounting groove, the mounting groove the tip abuts the side wall of the mounting groove in the mounted state It is formed to elastically deform like a return of a hook so as to have a large resistance to the direction of coming out of
The fall prevention protrusions are respectively provided on both sides in the width direction of the distal end so as to extend from the upper surface of the base in the mounting groove toward the other member along the depth direction of the mounting groove. A gasket characterized by being made. 2. The gasket according to claim 1, wherein the falling-off preventing protrusion and the falling-off preventing protrusion are provided individually or as a set on the gasket main body . 3. The set of the fall-off prevention protrusion and the fall-off prevention protrusion is formed by arranging the fall-off prevention protrusion at a tip located immediately above the fall-off prevention protrusion. The gasket according to claim 2 , wherein A plurality of individual drop-off prevention protrusions and a plurality of individual fall-down prevention protrusions are provided at predetermined intervals along the longitudinal direction of the mounting groove. The gasket according to claim 2 , wherein The individual protrusion-preventing protrusions and the individual protrusion-preventing protrusions are alternately arranged at predetermined intervals along the longitudinal direction of the mounting groove. The gasket according to claim 4 . The gasket according to claim 2, wherein a plurality of sets of the falling-off preventing protrusions and the falling-down preventing protrusions are provided along a longitudinal direction of the mounting groove . 5. A plurality of individual drop-off prevention projections and a set of the drop-off prevention projections and the set of the fall-prevention projections are provided at predetermined intervals along the longitudinal direction of the mounting groove. The gasket according to claim 2 , wherein the gasket is provided. A plurality of individual projections for the fall prevention and a set of projections for the fall prevention and the projections for the fall prevention are respectively provided at predetermined intervals along the longitudinal direction of the mounting groove. The gasket according to claim 2 or 3 , wherein The individual projections for the fall prevention, the individual projections for the fall prevention, and the set of the projections for the fall prevention and the projections for the fall prevention each have a longitudinal length of the mounting groove. 4. The gasket according to claim 2, wherein a plurality of gaskets are provided at predetermined intervals along the direction .

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