JP6722457B2 - Sealing device - Google Patents

Description

The present invention relates to a sealing device configured by stacking a plurality of metal gaskets.

In a sealing device that seals a gap between two members, there is known a sealing device configured by stacking a plurality of metal gaskets. In such a sealing device, a plurality of metal gaskets are fixed by spot welding or caulking with rivets or eyelets.

In the case of fixing by spot welding, if the spatter generated during welding remains sandwiched between the gaskets, the sealing performance will be adversely affected. Such a problem becomes more remarkable as the number of stacked gaskets increases. In addition, the larger the number of gaskets to be stacked, the larger the equipment required for welding, and the more likely spatter occurs. Even in the case of crimping with rivets or eyelets, if the number of gaskets to be stacked is large, not only the equipment becomes large, but also crimping failure easily occurs. Even if a caulking failure occurs, the sealing performance is adversely affected.

JP-A-11-230353

An object of the present invention is to provide a sealing device capable of suppressing an increase in the size of equipment for fixing gaskets even when the number of gaskets to be stacked is large and stably exhibiting sealing performance. To do.

The present invention adopts the following means in order to solve the above problems.

That is, the sealing device of the present invention,
In a sealing device that seals a gap between two members,
A sealing device configured by stacking three or more N metal gaskets,
By fixing the gaskets at a plurality of locations, the N metal gaskets are fixed together,
Number of gasket are secured together at each location, even in any position (N-1) Ri der less, if the N is greater than or equal to five, the Ru der 4 below the number of gasket are secured together It is characterized by

In the present invention, even in the sealing device configured by stacking three or more N gaskets made of metal, the number of gaskets fixed to each other at each location is (N− 1) It is suppressed below. As a result, it is possible to prevent the equipment for fixing the gaskets from increasing in size. In addition, it is possible to suppress problems that are likely to occur when a large number of gaskets are fixed to each other.

Here, regarding the parts at the locations where the gaskets are fixed to each other, when viewed in the direction in which the gaskets are overlapped, within the range of the area where the gaskets are fixed, other than the gaskets that are fixed to each other, The gasket should not be present.

For example, regarding the parts where the gaskets are fixed to each other, when viewed in the direction in which the gaskets are stacked, the gaskets other than the gaskets that are fixed to each other are within the range of the region where the gaskets are fixed to each other. Therefore, it is preferable that recesses are formed in the side wall surfaces of the gaskets other than the gaskets fixed to each other so that the concave portions do not exist.

Thereby, when fixing the gaskets at each location, it is possible to prevent the fixing work from being hindered by the gaskets other than the gaskets fixed to each other.

It should be noted that the above-mentioned respective configurations can be adopted in combination as much as possible.

As described above, according to the present invention, even if the number of gaskets to be stacked is large, it is possible to prevent the equipment for fixing the gaskets from increasing in size, and stably exhibit sealing performance. Can be made.

FIG. 1 is an external view of a sealing structure using a sealing device according to an embodiment of the present invention. FIG. 2 is a plan view of the sealing device according to the first embodiment of the present invention. FIG. 3 is a side view of the sealing device according to the first embodiment of the present invention. FIG. 4 is a plan view of a metal gasket that constitutes the sealing device according to the first embodiment of the present invention. FIG. 5 is a plan view of a metal gasket that constitutes the sealing device according to the first embodiment of the present invention. FIG. 6 is a plan view of a metal gasket that constitutes the sealing device according to the first embodiment of the present invention. FIG. 7 is a plan view of the sealing device according to the second embodiment of the present invention. FIG. 8 is a side view of the sealing device according to the second embodiment of the present invention. FIG. 9 is a plan view of a metal gasket that constitutes the sealing device according to the second embodiment of the present invention. FIG. 10 is a plan view of a metal gasket that constitutes the sealing device according to the second embodiment of the present invention. FIG. 11 is a plan view of a metal gasket that constitutes the sealing device according to the second embodiment of the present invention. FIG. 12 is a plan view of a metal gasket that constitutes the sealing device according to the second embodiment of the present invention.

MODES FOR CARRYING OUT THE INVENTION Modes for carrying out the present invention will be exemplarily described in detail below based on embodiments with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the constituent parts described in this embodiment are not intended to limit the scope of the present invention to them unless otherwise specified. .. INDUSTRIAL APPLICABILITY The sealing device according to the present invention can be used for sealing a gap between two members in various devices such as a device provided in an automobile (for example, an exhaust manifold provided in an internal combustion engine). In the following embodiments, a case where a sealing device is used to seal the connection between two pipes will be described as an example.

(Example 1)
A sealing device according to a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is an external view of a sealing structure using a sealing device according to an embodiment of the present invention. FIG. 2 is a plan view of the sealing device according to the first embodiment of the present invention. 3 is a side view of the sealing device according to the first embodiment of the present invention, and is a view of the sealing device viewed in the direction of arrow V in FIG. 4 to 6 are plan views of a metal gasket that constitutes the sealing device according to the first embodiment of the present invention.

<Sealed structure>
A sealing structure in which the sealing device 100 according to the present embodiment is used will be described with reference to FIG. 1. The sealing device 100 according to the present embodiment is used to seal a connecting portion between two pipes (hereinafter, referred to as a first pipe 210 and a second pipe 220, respectively, for convenience of description). That is, the first pipe 210 and the second pipe 220 are provided with the flange portions 211 and 221 respectively. Then, in a state where the sealing device 100 is sandwiched between the flange portions 211 and 221, the flange portions 211 and 221 are fixed to each other by the fixture 300 such as a bolt, so that the first pipe 210 and the second pipe 210 The pipe 220 is fixed. As a result, it is possible to prevent the fluid in the pipe from leaking to the outside through the gap between the portions connecting the first pipe 210 and the second pipe 220, and to prevent foreign matter from entering the pipe from the outside. Suppressed.

<Sealing device>
The configuration of the sealing device 100 according to the present embodiment will be described with reference to FIGS. The sealing device 100 according to the present embodiment is configured by stacking three or more N (in this embodiment, N=6) metal gaskets. Then, in the sealing device 100 according to the present embodiment, the N gaskets made of metal are fixed by fixing the gaskets at a plurality of locations. Further, the number of gaskets fixed to each other at each location is (N-1) or less. The details will be described below. Further, hereinafter, for convenience of description, in FIG. 3, the first and second gaskets from the top are referred to as a first gasket 110, and the third and fourth gaskets from the top are referred to as a second gasket 120, The fifth and sixth gaskets from the top are referred to as a third gasket 130. 4 is a plan view of the first gasket 110, FIG. 5 is a plan view of the second gasket 120, and FIG. 6 is a plan view of the third gasket 130. The gaskets shown in FIGS. 4 to 6 all correspond to the gaskets viewed from above in FIG.

Each of the first gasket 110, the second gasket 120, and the third gasket 130 is provided with through holes 111, 121, 131 in the central portion. These through holes 111, 121, 131 play a role as passages for the fluid flowing in the pipe. Further, beads 112, 122, 132 are formed on the first gasket 110, the second gasket 120, and the third gasket 130 according to the present embodiment so as to surround the through holes 111, 121, 131, respectively. For these beads 112, 122, 132, various known techniques such as half beads and full beads can be adopted. Further, the number of beads is not particularly limited, and two or more beads may be provided. Further, in the case of adopting the configuration in which the bead is provided only on one of the adjacent gaskets, it is possible to use the gasket having no bead for any of the plurality of gaskets. The bead itself is a known technique, so a detailed description thereof will be omitted, but the bead is composed of a protruding portion, and the tip of the protruding portion abuts on an adjacent mating gasket to increase the peak surface pressure. Therefore, the function of enhancing the sealing performance is exhibited. Further, the first gasket 110, the second gasket 120, and the third gasket 130 are provided with through holes 113, 123, and 133 at the four corners, respectively, through which the fixture 300 is inserted.

A pair of left and right recesses 114 in FIG. 4 are formed on the side wall surface of the first gasket 110. These recesses 114 are formed on the side wall surface of the first gasket 110 at positions that are offset to the right of the center in FIG. 3 and above the center in FIG. Further, a pair of left and right recesses 134 in FIG. 6 are formed on the side wall surface of the third gasket 130. These recesses 134 are formed on the side wall surface of the third gasket 130 at positions that are located on the left side of the center in FIG. 3 and below the center in FIG.

Then, in the sealing device 100 according to the present embodiment, the gaskets are fixed at four locations (two locations on the left side and two locations on the right side in FIG. 2), so that the six metal gaskets are secured to each other. ing. The fixed part at each position will be described with reference to FIG. Although FIG. 3 shows a side view seen from the right side in FIG. 2, the configuration of the fixed portion on the left side in FIG. 2 is the same as that on the right side.

In this embodiment, two first gaskets 110 and two second gaskets 120 are spot welded to each other, and two second gaskets 120 and two third gaskets 130 are spot welded. There are points fixed to each other by. Hereinafter, for convenience of description, the former fixing part will be referred to as a first fixing part, and the latter fixing part will be referred to as a second fixing part. The gaskets may be fixed to each other by caulking with rivets or eyelets instead of spot welding.

At the first fixing point, the gaskets are fixed by the welded portions X1, X2, X3 in FIG. At the second fixing portion, the gaskets are fixed by the welded portions Y1, Y2, Y3 in FIG. As described above, the number of gaskets fixed to each other at the first fixing point and the number of gaskets fixed to each other at the second fixing point are all four.

When the gaskets are fixed to each other in the area where the gaskets are fixed, the gaskets other than the gaskets fixed to each other are within the range of the region where the gaskets are fixed to each other. Does not exist. In the case of the present embodiment, this is achieved by the recess 114 formed on the side wall surface of the first gasket 110 and the recess 134 formed on the side wall surface of the third gasket 130.

That is, when viewed in the direction in which the gaskets are overlapped with respect to the first fixing portion, gaskets that are fixed to each other (two first gaskets 110 and two gaskets) are provided within the range of the welded portions X1, X2, and X3. The second gaskets 120) and the second gaskets 120) are not provided with the recesses 134 on the side wall surfaces of the two third gaskets 130 (see FIG. 2). Further, when viewed in the direction in which the gaskets are overlapped with respect to the second fixing portion, gaskets that are fixed to each other (two second gaskets 120 and two gaskets) are provided within the range of the welded portions Y1, Y2, Y3. No. 3 gasket 130) is not present, and recesses 114 are formed in the side wall surfaces of the two first gaskets 130 respectively (see FIG. 2).

<Advantages of the sealing device according to the present embodiment>
In this embodiment, even in the sealing device 100 configured by stacking three or more N (specifically, six) metal gaskets, the number of gaskets fixed to each other at each location is , (N-1) or less (specifically, 4 sheets) or less at any place. As a result, it is possible to prevent the equipment for fixing the gaskets from increasing in size. In addition, it is possible to suppress problems that are likely to occur when a large number of gaskets are fixed to each other. That is, when the gaskets are fixed to each other by spot welding, generation of spatter can be suppressed. As a result, it is possible to prevent the spatter from being trapped between the gaskets. Therefore, the sealing performance can be stably exhibited. In addition, even when the gaskets are fixed to each other by caulking with rivets or eyelets, it is possible to suppress the occurrence of caulking defects. Therefore, also in this case, the sealing performance can be stably exhibited.

In addition, in the present embodiment, as described above, for each part where the gaskets are fixed to each other, when viewed in the direction in which the gaskets are stacked, within the range of the part where the gaskets are fixed to each other. There is no gasket other than the gaskets that are fixed to each other. Therefore, when fixing the gaskets at each location, it is possible to prevent the fixing work from being hindered by the gaskets other than the gaskets fixed to each other. Since the shapes of the parts that fix the gaskets to each other are different for each gasket, it is possible to obtain an effect that it is possible to prevent the gaskets from being stacked in an incorrect order.

(Example 2)
Embodiment 2 of the present invention is shown in FIGS. The application of the sealing device and the sealing structure are the same as those described in the first embodiment, and thus the description thereof will be omitted. FIG. 7 is a plan view of the sealing device according to the second embodiment of the present invention. FIG. 8 is a side view of the sealing device according to the second embodiment of the present invention, and is a view of the sealing device viewed in the direction of arrow V in FIG. 7. 9 to 12 are plan views of a metal gasket constituting the sealing device according to the second embodiment of the present invention.

The sealing device 100X according to the present embodiment is configured by stacking three or more N gaskets (N=6 in this embodiment) made of metal. In the sealing device 100X according to this embodiment, N gaskets made of metal are fixed to each other by fixing the gaskets at a plurality of locations. Further, the number of gaskets fixed to each other at each location is (N-1) or less. The details will be described below. Further, for convenience of description, in FIG. 8, the first and third gaskets from the top are referred to as a fourth gasket 140, the second gasket from the top is referred to as a fifth gasket 150, and the four gaskets from the top in FIG. The sixth gasket and the sixth gasket are referred to as a sixth gasket 160, and the fifth gasket from the top is referred to as a seventh gasket 170. 9 is a plan view of the fourth gasket 140, FIG. 10 is a plan view of the fifth gasket 150, FIG. 11 is a plan view of the sixth gasket 160, and FIG. 12 is a plan view of the seventh gasket 170. is there. The gaskets shown in FIGS. 9 to 12 all correspond to the view of the gasket viewed from above in FIG.

The fourth gasket 140, the fifth gasket 150, the sixth gasket 160, and the seventh gasket 170 are all provided with through holes 141, 151, 161, 171 in the center. These through holes 141, 151, 161, 171 serve as passages for the fluid flowing in the pipe. In addition, in the fourth gasket 140, the fifth gasket 150, the sixth gasket 160, and the seventh gasket 170 according to this embodiment, the beads 142, 152, and the 162 and 172 are formed. Since the bead is as described in the first embodiment, the description thereof will be omitted. Further, the fourth gasket 140, the fifth gasket 150, the sixth gasket 160, and the seventh gasket 170 are provided with through holes 143, 153, 163, 173 at the four corners through which the fixture 300 is inserted. There is.

A pair of left and right recesses 144 in FIG. 9 are formed on the side wall surface of the fourth gasket 140. These recesses 144 are formed on the side wall surface of the fourth gasket 140 at positions including the center portion in FIG. 8 and offset to the left side, and in FIG. 9 at positions including the center portion and offset to the lower side. In addition, a pair of left and right recesses 154 in FIG. 10 are formed on the side wall surface of the fifth gasket 150. These recesses 154 are formed on the side wall surface of the fifth gasket 150 at a position deviated to the left of the center in FIG. 8 and below the center in FIG. 10. A pair of left and right recesses 164 in FIG. 11 is formed on the side wall surface of the sixth gasket 160. These recesses 164 are formed on the side wall surface of the sixth gasket 160 at positions including the center in FIG. 8 and biased to the right, and at positions including the center and biased to the upper in FIG. 11. Further, a pair of left and right recesses 174 in FIG. 12 are formed on the side wall surface of the seventh gasket 170. These recesses 174 are formed on the side wall surface of the seventh gasket 170 at a position which is located on the right side of the center in FIG. 8 and on the upper side of the center in FIG.

Then, in the sealing device 100X according to the present embodiment, the gaskets are fixed at six places (three places on the left side and three places on the right side in FIG. 7), so that the six metal gaskets are fixed to each other. ing. The fixed part at each position will be described with reference to FIG. Although FIG. 8 shows a side view seen from the right side in FIG. 7, the configuration of the left fixed portion in FIG. 7 is also the same as the right side.

In the present embodiment, one fifth gasket 150, a portion where two fourth gaskets 140 arranged so as to sandwich the fifth gasket 150 are fixed to each other by spot welding, and one seventh gasket 170, A place where two sixth gaskets 160 arranged so as to sandwich this are fixed to each other by spot welding, and a place where one fifth gasket 150 and one seventh gasket 170 are fixed to each other by spot welding. Exists. Hereinafter, for convenience of description, the respective fixing points will be referred to as a first fixing point, a second fixing point, and a third fixing point in order. In this embodiment as well, the gaskets may be fixed to each other by caulking with rivets or eyelets instead of spot welding.

At the first fixing portion, the gaskets are fixed by the welded portions X4 and X5 in FIG. At the second fixing portion, the gaskets are fixed by the welded portions Y4 and Y5 in FIG. At the third fixing portion, the gaskets are fixed by the welded portion Z in FIG. The number of gaskets fixed to each other at the first fixing point and the number of gaskets fixed to each other at the second fixing point are both three. Further, the number of gaskets fixed to each other at the third fixing position is two.

When the gaskets are fixed to each other in the area where the gaskets are fixed, the gaskets other than the gaskets fixed to each other are within the range of the region where the gaskets are fixed to each other. Does not exist. In the case of the present embodiment, the concave portion 144 formed on the side wall surface of the fourth gasket 140, the concave portion 154 formed on the side wall surface of the fifth gasket 150, and the concave portion formed on the side wall surface of the sixth gasket 160. This is realized by 164 and the recess 174 formed on the side wall surface of the seventh gasket 170.

That is, when the first fixing portion is viewed in the direction in which the gaskets are stacked, the gaskets to be fixed to each other (one fifth gasket 150 and the fifth gasket 150 are sandwiched between them) within the range of the welding portions X4 and X5. The gaskets (one seventh gasket 170 and two sixth gaskets 160 arranged so as to sandwich the gasket) other than the two fourth gaskets 140 arranged as described above are not present. Recesses 174 and 164 are formed on the sidewall surface of the gasket 170 and the sidewall surfaces of the two sixth gaskets 160, respectively. Further, when the second fixing portion is viewed in the direction in which the gaskets are stacked, the gaskets to be fixed to each other (one seventh gasket 170 and this are sandwiched between the welding portions Y4 and Y5). The fifth gasket 150 (one fifth gasket 150 and the two fourth gaskets 140 sandwiching the fifth gasket 150) other than the two sixth gaskets 160 arranged as described above are not present. Recesses 154 and 144 are formed on the sidewall surface of the gasket 150 and the sidewall surfaces of the two fourth gaskets 140, respectively. Furthermore, when the gaskets are overlapped with respect to the third fixing portion, the gaskets to be fixed to each other (one fifth gasket 150 and one seventh gasket 150) are within the range of the welded portion Z. 170) so that there are no gaskets (two fourth gaskets 140 and two sixth gaskets 160) other than 170), the side wall surfaces of the two fourth gaskets 140 and the side wall surfaces of the two sixth gaskets 160. Recesses 144 and 164 are formed in each of them.

Also in the sealing device 100X according to the present embodiment configured as described above, the same effect as in the case of the above-described first embodiment can be obtained.

(Other)
In each of the above-described embodiments, the case where N=6 is shown for the sealing device configured by stacking three or more N gaskets made of metal, but in the present invention, it is limited to N=6. It will not be done. When N is 5 or more, the number of gaskets fixed to each other is preferably 4 or less. As a result, it is possible to more reliably suppress an increase in the size of the equipment for fixing the gaskets to each other, and it is possible to more reliably suppress the problem that tends to occur when a large number of gaskets are fixed to each other.

Further, in each of the above-mentioned examples, “for each part where the gaskets are fixed to each other, when viewed in the direction in which the gaskets are stacked, within the range of the part where the gaskets are fixed, In order to achieve an object such as "there is no gasket other than the gaskets fixed to each other", a configuration is shown in which recesses are formed on the side wall surfaces of the gaskets other than the gaskets fixed to each other.

However, the present invention is not limited to the configuration in which the recesses are formed on the side wall surfaces of the gaskets other than the gaskets fixed to each other in order to achieve the above object. For example, it is possible to achieve the above-mentioned object also by providing protrusions protruding outwardly with respect to gaskets fixed to each other and fixing the protrusions to each other.

100,100X Sealing device 110 1st gasket 120 2nd gasket 130 3rd gasket 140 4th gasket 150 5th gasket 160 6th gasket 170 7th gasket 111,121,131,141,151,161,171 Through hole 112, 122, 132, 142, 152, 162, 172 Beads 113, 123, 133, 143, 153, 163, 173 Through-holes 114, 124, 134, 144, 154, 164, 174 Recesses 210 First pipe 220 Second pipe 211 , 221 Flange part 300 Fixing tool X1, X2, X3, X4, X5 Welding part Y1, Y2, Y3, Y4, Y5 Welding part Z Welding part

Claims (3)

In a sealing device that seals a gap between two members,
A sealing device configured by stacking three or more N metal gaskets,
By fixing the gaskets at a plurality of locations, the N metal gaskets are fixed together,
Number of gasket are secured together at each location, even in any position (N-1) Ri der less, if the N is greater than or equal to five, the Ru der 4 below the number of gasket are secured together A sealing device characterized by the above. Regarding the parts where the gaskets are fixed to each other, when viewed in the direction in which the gaskets are stacked, there is a gasket other than the gaskets that are fixed to each other within the area of the part where the gaskets are fixed to each other. The sealing device according to claim 1, which is not provided. Regarding the parts where the gaskets are fixed to each other, when viewed in the direction in which the gaskets are stacked, there is a gasket other than the gaskets that are fixed to each other within the area of the part where the gaskets are fixed to each other. The sealing device according to claim 1, wherein recesses are formed in side wall surfaces of the gaskets other than the gaskets fixed to each other so that they are not formed.