JP3310547B2 - gasket - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a gasket. In particular, the present invention relates to a gasket that is stably seated so as to exhibit a sealing force when pressed.

[0002]

2. Description of the Related Art Japanese Patent Publication No.
There is a gasket disclosed in Japanese Patent No. 40192.

FIG. 9 is a plan view of this gasket, and FIG. 11 shows a state in which the AA cross section shown in FIG.

The gasket 50 is formed in an annular shape, and is provided with a convex surface 5 at both sides or one side of the inner and outer peripheral surfaces of the main body 52.
1 is formed. The gasket 50 is attached to the groove 61 of the metal housing 60. The mounting state is as follows.

That is, the height C of the main body 52 of the gasket 50 is higher than the depth a of the groove 61, the width of the AA cross section of the main body 52 is smaller than the width b of the groove 61, and The width of the convex surface 51 provided on the −B cross section, that is, on both sides or one side surface, is substantially equal to or slightly larger than the width b of the groove 61.

When the gasket 50 is fitted in a groove 61 such as a housing, one convex surface 51 provided at an appropriate position around the gasket 50 is fitted in the groove 61, so that the convex surface is formed. Since the width of the groove 51 is slightly larger than the width b of the groove 61, the groove 51 is tightly fitted in the groove 61 and securely mounted. The main body 52 having a dimension e smaller than the width b of the groove 61 between the convex surfaces 51 is naturally fitted to the groove 61 by sequentially fitting the other convex surfaces 51 in the groove 61 in the same manner. Things.

Since the height C of the gasket 50 fitted over the entire groove 61 is higher than the depth a of the groove 61, the groove 6
1 protrudes from the upper surface by d dimension. Therefore, when the surface of the gasket 50 that is in contact with the housing 60 is pressed, the d dimension of the upper surface of the protruding gasket 50 is pressed and deformed. 61 are adhered to the inner surfaces of both sides.

However, the main body 52 of the gasket 50
11 is larger than the width b of the groove 61 in FIG.
As shown in FIG. 12, when compressed by the housing 60 from the upper surface in the figure, the convex surface 51 of the main body 52 is in an abnormal seating state as shown in FIG. In particular, since the center between the convex surfaces 51 and 51 is abnormally deformed and is normally joined as approaching the convex surface 51 side,
The sealing surface 53 joining the housing 60 of the main body 52 is unevenly contacted over the entire surface, and the sealing ability is deteriorated.

Further, since the convex surface 51 protrudes laterally in a rectangular shape, the corner of the convex surface comes into contact with the side surface of the groove 61 to make insertion difficult. In addition, in the sealing surface 53 between the sealing surfaces 53 of the sealing surface 53 of the main body 52 having the convex surface 51 that is in pressure contact with the side surface of the groove 61, the degree of crimping which depends on the convex surface 51 is different, so that the sealing ability becomes uneven. become.

Therefore, it is difficult to increase the number of the convex surfaces 51, 51 in the main body 52, so that the interval between the convex surfaces 51, 51 is increased, and the above-mentioned sealing ability is further deteriorated. Further, when the groove 61 is formed of a resin material, the sealing ability of the gasket also deteriorates due to the relationship with the working capacity. Furthermore, since the resin-made groove undulates and warps due to a temperature change, the sealing performance is deteriorated unless the crushing allowance is increased.

The present invention has been made in view of the above-mentioned problems, and has a technical problem that the gasket can be reliably mounted even if the mounting groove of the gasket is provided on a member that changes with temperature. In addition, the gasket is pressed while being kept in a normal state even when the gasket is pressed. Another object of the present invention is to prevent a part of the gasket from being abnormally pressed to lower the sealing ability of the sealing surface.

[0012]

Means for Solving the Problems The present invention has been made to solve the above-mentioned problems, and the technical means thereof are configured as follows. That is,

[0013] Claim 1 provides a gasket which is attach a large mounting groove depth dimension than the width dimension, in cross-section before
Serial is formed smaller width than the width of the mounting groove when co
The height of the mounting groove is larger than the depth of the mounting groove.
Has a rubber-like elastic material made of body to be, in the main body, smaller than the height spaced side surfaces in a width direction <br/> direction, the groove side surface of the <br/> mounting groove Formed in contact or close width dimensions
And a projection surface of the inclination prevention projection.
Small protrusions provided at intervals larger than the width of the mounting groove
With raised portions and protruding at both ends of the end face in the height dimension direction
It has .

[0014] Also, according to claim 2, in claim 1, wherein
The small protrusion is provided substantially at the center of the protrusion surface of the tilt prevention protrusion.
It is what is being done. Further, claim 3 is claim 1
Alternatively, in claim 2, the small projection has a hemispherical shape.
Is what it is.

[0015]

When the member provided with the mounting groove expands and contracts due to heat such as a resin material, the sealing surface of the gasket 1 and the housing 20 must be joined unless the depth of the mounting groove is increased. There may be gaps on the surface. But,
Since the height b is larger than the width e of the main body 2, the problem does not occur. Then, when the gasket 1 is mounted in the mounting groove 21 and the housings 20 are joined to each other, the gasket 1 is contracted by the protrusion 4 for preventing the gasket from falling over the groove side surface of the mounting groove 21. At the same time, the main body 2 is compressed without being inclined by the projections 6 provided on the end face in the height direction of the main body 2.

A small projection 8 is provided on the projection surface 7 of the tilt prevention projection 4.
The gasket 1 is prevented from dropping out of the mounting groove 21 without causing abnormal compression of the tilt-preventing projection 4.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a gasket 1 according to the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view of a gasket 1 according to an embodiment of the present invention. This gasket 1 is used for an inred manifold, a filter bracket and the like.

In FIG. 1, reference numeral 1 denotes a gasket. The gasket 1 is made of a rubber-like elastic material. Particularly, it is made of silicon rubber or fluorine rubber so as to exhibit heat resistance.

The gasket 1 has a main body 2 formed in an annular shape. The main body 2 is formed in a rectangular cross section as shown in FIG. FIG. 2 is a sectional view of the gasket 1 taken along line AA. The side surface 3 of the main body 2 has a central portion 11 and a central portion 1 of parallel width.
1 are formed on a compression portion 13 having a tapered surface 12.

The end face 5 of the compression section 13 has arc-shaped projections 6 formed at both ends. The projection 6 may be formed on a semicircular surface, but may be formed with a V-shaped groove at both ends with corners. These shapes are appropriately set according to the compression force. In particular, it is necessary to provide the protrusions 6 on both end sides of the upper end face 5.

The side surfaces 3 of the main body 2 are provided with equally spaced protruding portions 4 at intervals. The tilt-preventing convex portion 4 is at the position of BB in FIG. 1, and its cross section has the shape shown in FIG. As shown in FIG. 5, the tilt prevention projection 4 projects in an arc shape.

The tilt preventing projection 4 has a height c and is provided at the center 11 of the main body 2. That is,
The compression parts 13 are formed on both end faces 5.

One small projection 8 projecting hemispherically is formed on the projection surface 7 of the tilt prevention projection 4. A plurality of the small protrusions 8 may be provided in the length direction. Also, small projections 8
The radius R of the hemisphere is preferably about 0.3 to 0.5 mm. This depends on the size of the gasket.

FIG. 4 is a cross-sectional view showing the small protrusion 8, which is a cross-section taken along the line CC of FIG. Small protrusion 8
Is larger than the width A of the mounting groove 21 so as to be in pressure contact with the groove side surface 22 of the mounting groove 21. FIG. 5 is a plan view in which small protrusions are provided on the tilt-preventing convex portions 4.

FIG. 6 is a cross-sectional view in which the projection 4 is attached to the mounting groove 21. The tilt prevention projection 4 protrudes from the upper contact surface 23 of the mounting groove 21 by the dimension e. And the compression part 13 is formed in the upper and lower sides of the fall prevention convex part 4 in the shape protruded by d dimension.

The mounting groove 21 has a rectangular cross section.
The width is formed in the A dimension. Further, the depth is formed to the B dimension. The gasket 1 is provided in the mounting groove 21.
The protrusion 6 (seal surface 10) is crimped by the housing 20.

The width dimension a of the tilt-preventing projection 4 is formed to be close to or in contact with the width A of the mounting groove 21, and the tilt-preventing projection 4 fitted into the mounting groove 21 slides and compresses. It is made possible.

FIG. 7 is a view showing a state in which the small projection 8 is fitted in the mounting groove 21. The dimension f between the small projections 8 is slightly larger than the width A of the mounting groove 21 and is pressed against the gasket 1 so that the gasket 1 does not fall out of the mounting groove 21.

FIG. 8 is a cross-sectional view of the gasket 1 in a state in which the protrusion 4 is pressed against the mounting groove 21. The gasket 1 has the protrusions 6 (seal surface 10) when the compression portion 13 is compressed.
Is a state where the bottom surface of the mounting groove 21 and the joining surface of the housing 20 are normally joined. Due to this mounting state, even if the mounting groove 21 is made of a resin material and has undulation, warpage, or large surface roughness, it is possible to exhibit the sealing ability.

In addition to the above-described embodiment, the lengths of the upper and lower portions of the compression portion 13 may be different. Further, the arc-shaped surface of the tilt prevention projection 4 may be trapezoidal. Further, if necessary, various shapes can be set so as to reduce the bonding area to be bonded to the groove side surface 22. Further, the projection 6 may be formed in a square shape instead of a semicircle shape. In addition, any other shape may be used as long as the end face 5 can be stably joined. or,
The tilt prevention projection 4 may be provided only on one side, and the small projections 8 may be provided on both sides.

While the gasket 1 is fitted in the mounting groove 21, it is preferable that the end face 9 of the projection 4 is projected from the upper contact surface 23 of the mounting groove 21 by e dimension. When d is small, the dimension e may be set to 0 or minus.

[0033]

The gasket of the present invention described in claim 1 according to the present invention is to width, but is of height greater shape is guided by the groove side surface of the mounting groove slides, the insertability problem
Can be installed without a gasket.
You. In addition, small projections at intervals larger than the width of the mounting groove
Small projections are attached because they are provided on the convex surface of the stop projection
Presses against the groove side surface of the groove, causing abnormal compression on the overturn prevention protrusion.
Without this, the gasket can be prevented from falling off.
Further, the protrusions that are in close contact with the mating member are provided at both ends of the end face in the height direction.
As it is raised, it exerts the sealing effect of the sealing surface when compressed
Can prevent the body from tilting
You.

In the gasket according to the present invention, the small projection is provided substantially at the center of the projection surface of the tilt prevention projection.
To prevent gasket from falling off more effectively
I can expect that. Further, according to the present invention described in claim 3,
The gasket is a gasket according to claims 1 and 2.
In addition to the effect that the small projections are hemispherical,
The surface of the small spherical protrusion is efficiently pressed against the side of the mounting groove.
To prevent gasket falling off more effectively.
Can be expected to stop.

By adopting the gasket of the present invention, even if the housing is made of resin from iron or AL casting, the sealing ability can be exhibited in response to the undulation and warpage of the mounting groove accompanying the resin. Can be.

[Brief description of the drawings]

FIG. 1 is a plan view of a gasket showing one embodiment of the present invention.

FIG. 2 is a sectional view of the gasket of FIG. 1 taken along the line AA.

FIG. 3 is a sectional view of the gasket of FIG. 1 taken along line BB.

FIG. 4 is a cross-sectional view of the gasket of FIG. 1 taken along line CC.

FIG. 5 is an enlarged plan view showing D of the gasket of FIG. 1;

FIG. 6 is a cross-sectional view in which the protrusion for preventing tilting shown in FIG. 3 is fitted into a mounting groove.

7 is a cross-sectional view in which the small protrusion shown in FIG. 4 is fitted in a mounting groove.

FIG. 8 is a view showing a state in which the gasket of FIG.

FIG. 9 is a plan view of a conventional gasket.

FIG. 10 is a cross-sectional view of the gasket of FIG. 9 in which a BB portion is mounted in a mounting groove.

11 is a cross-sectional view of the gasket of FIG. 9 in which an AA portion is mounted in a mounting groove.

FIG. 12 is a diagram showing a state where the main body of FIG. 11 is pressed between housings.

[Explanation of symbols]

 1, 50 gasket 2, 52 body 3 side surface 4 tip-over prevention part 5 end face 6 projection 7 projection part 8 small projection part 9 tip-over prevention projection End surfaces 10, 53 ... Seal surface 11 ... Central portion 12 ... Tapered surface 13 ... Compressed portion 20, 60 ... Housing 21 ... Mounting groove 22 ... Groove side surface 23 ... Mounting groove upper contact surface 51 …… Convex surface 61 …… Groove

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-266163 (JP, A) JP-A-8-303599 (JP, A) JP-A 7-18068 (JP, U) JP-A 58- 124639 (JP, U) JP 5-52256 (JP, U) JP-A 62-75262 (JP, U) JP 47-40192 (JP, Y1) (58) Field surveyed (Int. ⁷ , DB name) F16J 15/10

Claims (3)

(57) [Claims] 1. A gasket to be mounted in a mounting groove having a depth dimension larger than a width dimension, wherein a cross section is formed to have a width dimension smaller than the width dimension of the mounting groove and a depth dimension of the mounting groove. has a rubber <br/> body made of beam-like elastic material formed into a height dimension greater than the said body, smaller than the height spaced side surfaces in a width direction, the mounting groove The projection has a tilting prevention protrusion formed to have a width dimension in contact with or close to the groove side surface, and the projection surface of the tilting prevention protrusion has a front surface.
Small projections are provided at intervals larger than the width of the mounting groove.
A gasket characterized by having projections on both ends of an end face in a height dimension direction . 2. The small projection is a projection of the tilt prevention projection.
2. The gasket according to claim 1, wherein the gasket is provided substantially at the center of the surface . 3. The small projection may be hemispherical.
The gasket according to claim 1, wherein: