JP4010137B2 - gasket - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a gasket used by being mounted in a mounting groove.
[0002]
[Prior art]
Generally, when a gap between two members is sealed with a gasket, a groove for mounting is provided in one member, and a gasket is mounted in the mounting groove, and the groove bottom of the mounting groove and the surface of the other member The gasket is sealed by adhering the gasket. Hereinafter, of the two members, the member on the side provided with the mounting groove is referred to as a first member, and the other member is referred to as a second member.
[0003]
As an example of using a gasket, it is mounted in a mounting groove provided in the head cover of the cylinder head, and the cylinder head (corresponding to the second member) and the head cover (corresponding to the first member) are in close contact with each other. Is mentioned.
[0004]
Here, in order to improve the mounting property when mounting the gasket in the mounting groove, the width dimension of the mounting groove in the groove width direction of the gasket should be made thinner than the groove width of the mounting groove. It is common.
[0005]
However, in the case of such a shape, since the gasket can move freely in the mounting groove, the gasket falls down and the sealing performance becomes unstable.
[0006]
For this reason, for example, as in the technique disclosed in Japanese Patent Application Laid-Open No. 10-9395, by providing protrusions for preventing the collapse at a plurality of locations, the gasket is prevented from falling and the sealing performance is maintained. .
[0007]
Thus, by providing a plurality of protrusions for preventing the fall, the fall of the gasket can be prevented. However, in consideration of the shape of the mounting groove for mounting the gasket and the like, the arrangement configuration of the protrusions for preventing the fall was not set, and therefore the fall prevention function was sometimes insufficient. Therefore, it may be difficult to maintain a stable sealing performance.
[0008]
Such an example will be described with reference to FIG. FIG. 4 is a schematic plan view showing a mounting state of the gasket according to the prior art.
[0009]
As shown in the figure, the gasket 1 includes a body portion 2 and a plurality of fall prevention protrusions 3 provided on the body portion 2. And each fall prevention protrusion 3 contact | abuts to the both-sides wall surface of the mounting groove 52, respectively, and the fall of the gasket 1 is prevented.
[0010]
By the way, in order to accurately attach the first member 50 and the second member provided with the mounting groove, as shown in FIG. 4, a collar 51 may be provided at an attachment portion for attaching these members. is there.
[0011]
In terms of dimensions, the collar 51 may be provided adjacent to the side wall surface of the mounting groove 52 in which the gasket 1 is mounted, and the fitting hole 51b for fitting the collar 51 is provided in the mounting groove 52. It may be provided so as to communicate with the side wall surface side.
[0012]
In this case, as shown in FIG. 4, a communication path 51 a that communicates from the side wall surface of the mounting groove 52 to the fitting hole 51 b is formed.
[0013]
Therefore, the groove width of the mounting groove 52 becomes wide at the portion where the communication path 51a is provided. Thereby, the gasket 1 is easy to fall in this part, and the function of the fall prevention protrusion 3 may not fully function.
[0014]
[Problems to be solved by the invention]
As described above, in the prior art, depending on the shape of the mounting groove for mounting the gasket, the function of the protrusion for preventing the collapse may not be sufficiently exhibited.
[0015]
The objective of this invention is providing the gasket which can maintain the stable sealing performance.
[0016]
[Means for Solving the Problems]
In order to achieve the above object, in the present invention, there is provided an anti-falling projection that is in close contact with both side walls of the communication path communicating with the fitting hole of the collar from the side wall surface side of the mounting groove and in close contact with the surface of the collar. I prepared.
[0017]
According to the structure of this invention, it can prevent that a gasket shifts | deviates to the groove | channel direction of a mounting groove because the fall prevention protrusion closely_contact | adheres to the both-sides wall surface of a communicating path. And the fall prevention protrusion sticks to the surface of the collar, whereby the fall of the gasket can be prevented.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Exemplary embodiments of the present invention will be described in detail below with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention only to those unless otherwise specified. Absent.
[0019]
Note that the same components as those shown in FIG. 4 referred to in the description of the prior art will be described with the same reference numerals.
[0020]
With reference to FIGS. 1-3, the gasket which concerns on embodiment of this invention is demonstrated.
[0021]
The gasket according to the embodiment of the present invention is for sealing a gap between two members. A mounting groove is provided in one of the two members, and the gasket is mounted in the mounting groove. Thus, the gasket is sealed by bringing the gasket into close contact with the groove bottom of the mounting groove and the surface of the other member. The gasket according to the embodiment of the present invention is a rubber-like elastic body.
[0022]
One application example of the gasket according to the embodiment of the present invention will be described with reference to FIG. FIG. 3 is an external perspective view showing an application example of the gasket according to the embodiment of the present invention.
[0023]
As shown in FIG. 3, a head cover 500 is attached to the cylinder head 600. In this case, in order to prevent foreign matter from entering from the outside to the inside and to prevent oil from leaking from the inside to the outside. In order to achieve this, it is necessary to seal between the cylinder head 600 and the head cover 500.
[0024]
Therefore, a mounting groove (not shown) is provided in the head cover 500, and the gasket 100 according to the present embodiment is mounted in the mounting groove. Then, the head cover 500 is attached to the cylinder head 600 with the gasket 100 attached.
[0025]
As a result, the gasket 100 forms a sealing surface on the groove bottom of the mounting groove and the surface of the cylinder head 600, respectively, so that the gap between the cylinder head 600 and the head cover 500 can be sealed.
[0026]
Here, in the gasket according to the present embodiment, in order to improve the mounting property when the gasket is mounted in the mounting groove, the width dimension in the groove width direction of the mounting groove in the gasket is larger than the groove width of the mounting groove. The shape is thin.
[0027]
On the other hand, with such a shape, the gasket can move freely in the mounting groove, and the gasket may fall down and the sealing performance becomes unstable. Provided.
[0028]
These points will be described in detail with reference to FIG. 1 and FIG.
[0029]
FIG. 1 is a schematic plan view showing a state where a gasket according to an embodiment of the present invention is mounted. 2 is a cross-sectional view corresponding to AA in FIG.
[0030]
In the figure, reference numeral 1 denotes a gasket according to the present embodiment for sealing a gap between two members.
[0031]
In the figure, 50 is one of the two members (hereinafter referred to as the first member 50). Reference numeral 60 denotes the other of the two members (hereinafter referred to as the second member 60).
[0032]
Here, the first member 50 corresponds to, for example, the head cover 500 shown in FIG. 3 described above. The second member 60 corresponds to, for example, the cylinder head 600 shown in FIG. 3 described above.
[0033]
A mounting groove 52 is provided in the first member 50, and the gasket 1 according to the present embodiment is mounted in the mounting groove 52. In this state, the first member 50 and the second member 60 are attached.
[0034]
Thereby, the 1st seal | sticker part 4 provided in one edge part of the trunk | drum 2 in the gasket 1 closely_contact | adheres to the groove bottom 52a of the mounting groove 52, and forms a sealing surface. Further, the second seal portion 5 provided at the other end of the body portion 2 in the gasket 1 is in close contact with the surface 61 of the second member 60 to form a seal surface.
[0035]
Thus, since the sealing surfaces are formed on the first member 50 and the second member 60, the space between the first member 50 and the second member 60 is sealed.
[0036]
In the illustrated example, the portion of the sealing surface formed on the second member 60 has a planar shape, but is not particularly limited to a planar shape. For example, a groove is formed in this portion, and this portion The second seal portion 5 may be in close contact with the groove bottom of the groove.
[0037]
Further, the gasket 1 according to the present embodiment is provided with a fall prevention protrusion 3 on each side of the body portion 2.
[0038]
Thereby, in a state where the gasket 1 is mounted in the mounting groove 52, the respective fall prevention protrusions 3 are brought into contact with both side wall surfaces 52b and 52c of the mounting groove 52, respectively. However, as long as the gasket 1 can be prevented from collapsing, it may not be in a completely contacted state.
[0039]
By providing the fall prevention protrusions 3 in this way, the gaskets 1 are positioned in the attachment grooves 52 at the portions where the fall prevention protrusions 3 are provided by contacting the both side wall surfaces 52 b and 52 c of the attachment grooves 52. .
[0040]
Therefore, the swell of the gasket 1 is prevented, and the gasket 1 is prevented from falling.
[0041]
Incidentally, as described above, in order to attach the first member 50 and the second member 60 with high accuracy, as shown in FIG. 1, the collar 51 is provided at the attachment portion between the first member 50 and the second member 60. May be provided.
[0042]
In terms of dimensions, the collar 51 may be provided adjacent to the side wall surface of the mounting groove 52 in which the gasket 1 is mounted, and the fitting hole 51b for fitting the collar 51 is provided in the mounting groove 52. It may be provided so as to communicate with the side wall surface side. Accordingly, the communication path 51a is provided in this portion, and the groove width of the mounting groove 52 is widened, so that the gasket 1 is likely to fall down.
[0043]
Therefore, in the embodiment of the present invention, as shown in FIG. 1, both sides of the communication path 51 a leading from the side wall surface (52 b or 52 c) in the straight portion of the mounting groove 52 to the fitting hole 51 b for fitting the collar 51. A configuration is provided in which a tip 31 for preventing fall is provided that is in close contact with the wall surface. Further, the fall prevention protrusion 31 is configured to be in close contact with the surface of the collar 51.
[0044]
Accordingly, since the fall prevention protrusions 31 are in close contact with both side walls of the communication passage 51a, the gasket 1 can be prevented from being displaced in the groove direction (linear direction) of the mounting groove 52.
[0045]
In addition, since the fall-preventing protrusion 31 is also in close contact with the surface of the collar 51, the gasket 1 can be prevented from falling.
[0046]
Thus, by providing the protrusion 31 for preventing the fall, the gasket 1 is prevented from shifting in the groove direction of the mounting groove, and the fall is prevented. As a result, the gasket 1 is mounted in a stable state in the mounting groove 52. Therefore, stable sealing performance can be maintained.
[0047]
【The invention's effect】
As described above, according to the present invention, the gasket can be mounted in a stable state, and a stable sealing performance can be maintained.
[Brief description of the drawings]
FIG. 1 is a schematic plan view showing a state where a gasket according to an embodiment of the present invention is mounted.
FIG. 2 is a cross-sectional view corresponding to AA in FIG.
FIG. 3 is an external perspective view showing an application example of a gasket according to an embodiment of the present invention.
FIG. 4 is a schematic plan view showing a mounting state of a gasket according to a conventional technique.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Gasket 2 Body part 3,31 Fall prevention protrusion 4 1st seal part 5 2nd seal part 50 1st member 51 Collar 51a Communication path 51b Fitting hole 52 Mounting groove 52a Groove bottom 52b, 52c Side wall surface 60 2nd member 61 Surface 100 Gasket 500 Head cover 600 Cylinder head

Claims (1)

A gasket that is mounted in a mounting groove provided in one of the two members and seals a gap between the two members,
In the gasket provided with a plurality of fall prevention protrusions that contact the side wall surface of the mounting groove to prevent the gasket from falling down,
The plurality of fall prevention protrusions are in close contact with the side wall surfaces of the communication path communicating with the fitting hole of the collar provided in the one member from the side wall surface side of the linear portion of the mounting groove, and the collar A gasket comprising a fall-preventing protrusion that is in close contact with the surface.

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