JP6568438B2 - Seal mechanism - Google Patents

Description

  The present invention relates to a sealing mechanism using a liquid gasket.

  A liquid gasket (FIPG: Formed in Place Gasket) is in a liquid state before application and is cured after application to change into a solid material. For example, a moisture curable liquid gasket that is cured by contact with moisture is used. Are known. When such a liquid gasket is applied to one seal surface and the other seal surface is pressed and exposed to air for a predetermined time, the liquid gasket is changed to a solid by moisture in the air, and the seal surfaces are sealed ( Sealing).

  Liquid gaskets are used in various fields. For example, Patent Document 1 discloses a technique for attaching an oil pan to a cylinder block that constitutes an engine using a liquid gasket.

JP-A-10-103152

  As described above, since the liquid gasket is cured by moisture or the like in the air, the portion that does not come into contact with air (moisture) cannot be cured. Therefore, depending on the application mode of the liquid gasket, there is a problem that a portion that does not come into contact with air is generated, and a portion that is not cured is generated.

  Therefore, an object of the present invention is to provide a seal mechanism that can reduce a portion that is not cured in a liquid gasket.

In order to solve the above problems, a sealing mechanism according to the present invention is a sealing mechanism that seals a first sealing surface and a second sealing surface, the first sealing surface and the second sealing surface. of, provided on at least one sealing surface, the liquid gasket is guided, a groove target member Ru arranged, is provided between the target member and the liquid gasket definitive in the groove, a plurality of interconnected cells And a porous body that holds at least the substance that promotes the hardening of the liquid gasket in the open cells.

The target member may be an O-ring, and a flow path through which a fluid passes may be formed inside the O-ring.
In order to solve the above problems, another sealing mechanism of the present invention is a sealing mechanism that seals a first sealing surface and a second sealing surface, the first sealing surface and the second sealing surface. A groove portion provided on at least one of the sealing surfaces, to which the liquid gasket is guided, and provided in the groove portion, and having a plurality of open cells, and at least the open cells promotes hardening of the liquid gasket. The liquid gasket is applied to at least one of the first sealing surface and the second sealing surface, and the first sealing surface and the first sealing surface When the two sealing surfaces are moved in a direction close to each other, the liquid gasket is crushed by both sealing surfaces and guided to the groove, and the porous body is guided to the liquid by the groove. Basket is before contacting the porous body, characterized in that it is configured to contact with the both sealing surfaces.

  Moreover, the said porous body is provided so that compression is possible, The height of the said porous body is good also as higher than the depth of the said groove part.

  According to the present invention, it is possible to reduce the portion of the liquid gasket that is not cured.

It is a figure which shows a part of chain cover and cylinder block sealed by a sealing mechanism. It is a figure for demonstrating the sealing mechanism concerning embodiment. It is a figure for demonstrating the conventional sealing mechanism. It is a figure for demonstrating the seal mechanism of a modification.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

  In the present embodiment, a configuration in which the seal mechanism seals the chain cover and the cylinder block will be described as an example. FIG. 1 is a view showing a part of the chain cover 110 and the cylinder block 120 sealed by the sealing mechanism 150. FIG. 1 (a) is a plan view of the chain cover 110, and FIG. The top view of is shown.

  As shown in FIG. 1A, the chain cover 110 is provided with a protruding portion 112, and a through passage 114 is formed in the protruding portion 112. Further, an insertion hole 116 through which a bolt (not shown) is inserted is formed at a position different from the protruding portion 112 in the chain cover 110. A surface of the chain cover 110 opposite to the surface on which the protruding portion 112 is provided becomes a seal surface (hereinafter referred to as “chain cover seal surface”) 110 a with the cylinder block 120.

  Further, as shown in FIG. 1B, the cylinder block 120 is provided with a protruding portion 122, and a through passage 124 is formed in the protruding portion 122. Further, the cylinder block 120 is provided with a step portion 126, and a seal surface (hereinafter referred to as “cylinder block seal surface”) 120 a with the chain cover 110 is formed from the step portion 126 to the edge portion 128. ing. A thread groove 130 into which a bolt (not shown) is screwed is formed on the cylinder block seal surface 120a. In the present embodiment, the upper surface 122a of the protrusion 122 and the cylinder block seal surface 120a are formed at substantially the same height.

  The cylinder block 120 is provided with a seal mechanism 150. The seal mechanism 150 includes a groove 152 (chamfer) extending from the step 126 to the protrusion 122 and a porous body 154 provided in the groove 152.

  The groove 152 is configured to be lower (deeper) than the cylinder block seal surface 120a. Further, an O-ring 132 (target member) made of an elastic member is disposed around the protrusion 122 in the groove 152. The inner diameter of the O-ring 132 is slightly smaller than the outer diameter of the protrusion 122, and the O-ring 132 extends and is inserted into the protrusion 122 so that the O-ring 132 comes into close contact with the protrusion 122. Become. Further, the height of the O-ring 132 is configured to be higher than the protrusion 122 and the cylinder block seal surface 120a.

  The porous body 154 is disposed between the step portion 126 and the O-ring 132 in the groove portion 152. The porous body 154 is composed of a compressible member, and is formed by foaming a resin or the like, for example. The porous body 154 has a plurality of open cells and holds air in at least the open cells.

  As will be described in detail later, after applying a liquid gasket (FIPG) to the cylinder block seal surface 120 a of the cylinder block 120, the bolt inserted into the insertion hole 116 of the chain cover 110 is threaded 130 of the cylinder block 120. Screwed onto. As a result, the chain cover 110 is fixed to the cylinder block 120, and a flow path through which the fluid passes through the through passages 114 and 124 is formed.

  FIG. 2 is a view for explaining the seal mechanism 150 according to the present embodiment, and shows a cross section taken along the line II-II of FIG. FIG. 2A shows a state before sealing, and FIG. 2B shows a state after sealing.

  As shown in FIG. 2A, the liquid gasket F is applied to the cylinder block seal surface 120 a in the cylinder block 120. After the liquid gasket F is applied to the cylinder block 120, when the chain cover 110 is fixed to the cylinder block 120 with bolts, the liquid gasket F is attached to the chain cover 110 as shown in FIG. It is crushed between the seal surface 110a and the cylinder block seal surface 120a of the cylinder block 120 and flows into the groove 152 side. Then, the liquid gasket F is changed to a solid material having elasticity, so that a gap generated between the chain cover seal surface 110a of the chain cover 110 and the cylinder block seal surface 120a of the cylinder block 120 is sealed. Become.

  Here, the properties of the liquid gasket will be described. The liquid gasket has a property of being cured by moisture in the air. For this reason, about the location which does not contact air (moisture), it cannot be hardened.

  FIG. 3 is a view for explaining a conventional sealing mechanism 10. The conventional sealing mechanism does not include the porous body 154. Accordingly, the liquid gasket F that has flowed into the groove 152 may come into contact with the O-ring 132 or may flow over the O-ring 132 and flow out into the through passages 114 and 124. When the liquid gasket F contacts the O-ring 132, the sealing function of the O-ring 132 may be impaired. Further, when the liquid gasket F flows out into the through passages 114 and 124, the flow passage including the through passages 114 and 124 is blocked, or the device disposed on the downstream side of the flow passage is affected. There is a fear. Therefore, in the conventional sealing mechanism 10, the rib 12 is formed on the outer peripheral side of the O-ring 132 to suppress contact between the liquid gasket F and the O-ring 132.

  However, in order to exhibit the sealing function by the O-ring 132, the height of the rib 12 cannot be made higher than that of the O-ring 132, the contact between the liquid gasket F and the O-ring 132, the flow path of the liquid gasket F It was difficult to reliably prevent spillage.

  Therefore, the seal mechanism 150 according to the present embodiment will be described with reference to FIG. Contact between the gasket F and the O-ring 132 can be suppressed. Thereby, the cylinder block 120 can be processed easily, and further, the weight of the cylinder block 120 can be reduced.

  Further, the porous body 154 of the present embodiment is configured by a compressible member, and the height H is configured to be greater than the depth D of the groove 152 and the height of the O-ring 132. Thus, when the chain cover 110 and the cylinder block 120 are moved in the approaching direction, the chain cover seal surface 110a is moved to the porous body 154 before the chain cover seal surface 110a contacts the O-ring 132. Can be contacted. Further, the porous body 154 is configured such that the porous body 154 is in contact with the chain cover seal surface 110a until the liquid gasket F is guided to the groove 152 and contacts the porous body 154. Therefore, the contact between the liquid gasket F and the O-ring 132 can be reliably prevented, and the liquid gasket F can be prevented from flowing out to the through passages 114 and 124.

  Further, as described above, the liquid gasket F is cured by reacting with moisture in the air when exposed to the air. Therefore, there is a possibility that the portion that is not exposed to air, that is, the portion separated from the cylinder block seal surface 120a (for example, in the vicinity of the O-ring 132) is not sufficiently cured.

  However, since the sealing mechanism 150 of the present embodiment includes the porous body 154 that holds air in open cells, the liquid gasket F is exposed to air from both sides. It is possible to reduce the places where the liquid gasket F is not hardened.

(Modification)
In the above embodiment, the configuration in which the O-ring 132 is disposed in the groove 152 has been described as an example. However, the O-ring 132 is not an essential configuration.

  FIG. 4 is a view for explaining a modified seal mechanism 250. As shown in FIG. 4, in the seal mechanism 250 that seals the first member 210 having the first seal surface 210a and the second member 220 having the second seal surface 220a, the second seal surface 220a It is only necessary that at least the porous body 254 is provided in the provided groove portion 252. Even in this sealing mechanism 250, the liquid gasket F is exposed to air from both sides, so that the portions of the liquid gasket F that are not exposed to air can be reduced. Also in the modified example, the porous body 254 is configured by a compressible member, and the height H is preferably configured to be greater than the depth D of the groove portion 252.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to this embodiment. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims, and these are naturally within the technical scope of the present invention. Is done.

  For example, in the above embodiment, the case where the seal mechanism 150 seals the chain cover seal surface 110a of the chain cover 110 and the cylinder block seal surface 120a of the cylinder block 120 constituting the engine has been described as an example. However, the member is not limited as long as the first sealing surface and the second sealing surface can be sealed using the liquid gasket. Moreover, the 1st sealing surface and the 2nd sealing surface may be provided in the same member.

  In the above embodiment, the configuration in which the groove 152 and the porous body 154 are provided on the cylinder block seal surface 120a of the cylinder block 120 has been described as an example. However, the chain cover seal surface 110a of the chain cover 110 may be provided with a groove and a porous body, or the chain cover seal surface 110a and the cylinder block seal surface 120a may be provided with a groove and a porous body. .

  In the above embodiment, the O-ring 132 has been described as an example of a target member that is prevented from being in contact with the liquid gasket F by the porous body 154. However, the target member is not limited to the O-ring 132.

  Moreover, in the said embodiment, before sealing, the structure by which the object member (O-ring 132) is distribute | arranged to the groove part 152 was mentioned as an example, and was demonstrated. However, the target member only needs to be disposed in the groove when the liquid gasket guided to the groove of at least one seal surface and the other seal surface are in contact with each other. 152 may not be arranged. For example, the target member and the groove 152 may be opposed to each other.

  Moreover, in the said embodiment and modification, the case where the porous bodies 154 and 254 were comprised with the member which can be compressed was mentioned as an example, and was demonstrated. However, the porous bodies 154 and 254 do not have to be compressible as long as they have a plurality of open cells and can hold at least a substance that promotes the hardening of the liquid gasket in the open cells. Therefore, the porous bodies 154 and 254 may be made of, for example, ceramic or metal.

  Moreover, in the said embodiment and modification, the structure which a liquid gasket hardens | cures with the water | moisture content in air was mentioned as an example and demonstrated. However, the type of the liquid gasket is not limited, and the liquid gasket may be cured with a substance other than moisture (for example, oxygen).

  Moreover, in the said embodiment and modification, although the porous body 154,254 demonstrated and demonstrated the structure which hold | maintained the air as an example, the gas containing water other than air and the content rate of water were increased. You may hold | maintain air, liquid water, and solid water (ice). In any case, the porous bodies 154 and 254 only need to hold a substance that promotes hardening of the liquid gasket.

  Moreover, in the said embodiment, the structure where the height H of the porous body 154 is higher than the depth D of the groove part 152 was mentioned as an example, and was demonstrated. However, the porous body 154 may be configured to contact the chain cover seal surface 110a and the cylinder block seal surface 120a before the liquid gasket F guided to the groove 152 comes into contact with the porous body 154. . The size, number, and shape of the porous bodies 154 and 254 may be appropriately designed according to the shape of the groove portions 152 and 252 and the amount of the liquid gasket F guided to the groove portions 152 and 252.

  Moreover, in the said embodiment, the liquid gasket F demonstrated as an example the structure applied to the cylinder block seal surface 120a in which the groove part 152 was formed. However, when the liquid gasket F is moved in the direction in which the first seal surface and the second seal surface are close to each other, the liquid gasket may be crushed by both seal surfaces and guided to the groove portion. It may be applied to the chain cover seal surface 110a that is not formed.

  The present invention can be used for a sealing mechanism using a liquid gasket.

F Liquid gasket 110a Chain cover seal surface (seal surface)
114 Through passage (flow path)
120a Cylinder block seal surface (seal surface)
124 Through passage (flow path)
132 O-ring (target member)
150, 250 Seal mechanism 152, 252 Groove parts 154, 254 Porous body

Claims (4)

A sealing mechanism that seals a first sealing surface and a second sealing surface,
Of the first seal surface and the second sealing surface, and provided on at least one sealing surface, the liquid gasket is guided, groove target member Ru arranged,
Provided between the target member and the liquid gasket definitive in the groove, and having a plurality of open cells, and a porous body for holding a material to accelerate the curing of the liquid gasket at least the open cells,
A sealing mechanism characterized by comprising: The target member is an O-ring,
The seal mechanism according to claim 1, wherein a flow path through which a fluid passes is formed inside the O-ring.   A sealing mechanism that seals a first sealing surface and a second sealing surface,
  A groove provided on at least one of the first seal surface and the second seal surface, to which the liquid gasket is guided;
  A porous body that is provided in the groove and has a plurality of open cells, and holds at least the substance that promotes hardening of the liquid gasket in the open cells;
With
  The liquid gasket is applied to at least one of the first seal surface and the second seal surface,
  When the first seal surface and the second seal surface are moved in the approaching direction, the liquid gasket is crushed by both seal surfaces and guided to the groove,
  The said porous body is comprised so that it may contact | abut to both said sealing surfaces before the said liquid gasket guide | induced to the said groove part contacts this porous body. The porous body is provided to be compressible,
The sealing mechanism according to any one of claims 1 to 3, wherein a height of the porous body is higher than a depth of the groove portion.

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