JP5649618B2 - Seal structure and method for forming seal structure - Google Patents

Description

  The present invention inserts a disposing member such as a pipe into a through hole formed in a wall portion constituting an outer wall of a building or the like, and is provided between an inner peripheral wall of the through hole and an outer peripheral surface of the disposing member. The present invention relates to a seal structure and a method for forming the seal structure in which water-tightness between the two is ensured by a sealed portion.

  Conventionally, a wall portion constituting an outer wall of a building or the like is formed with a through hole penetrating inside and outside of the building, and an installation member such as a pipe or a duct is inserted into the through hole from the outside of the building indoors or outdoors. The fluid can be supplied and discharged indoors to outdoors. At this time, between the through hole and the pipe, in order to ensure water-tightness indoors and outdoors, a seal portion is provided in the gap between the inner peripheral wall of the through hole and the outer peripheral wall of the pipe to form a seal structure. (For example, refer to Patent Document 1).

  Specifically, as shown in FIG. 8, the seal portion 4 is disposed on the outdoor side of the filling seal material 5 filled between the inner peripheral surface of the through hole 2 and the pipe 3 and the filling seal material 5. And a stretchable member 6 made of a highly stretchable material such as silicon sealant, and the stretchable member 6 has a structure for improving water tightness.

JP-A-63-180787

  By the way, since the piping 3 and the wall 1 are connected via the seal structure 4 as described above, for example, when an earthquake occurs, the relative positional relationship between the piping 3 and the wall 1 may change. . That is, as shown in FIG. 9, the gap below the pipe 3 may be reduced and the gap above the pipe 3 may be increased.

  As shown in FIG. 9, the wall portion 1 and the pipe 3 are relatively deformed as described above, so that the filling sealing material 5 below the piping 3 is compressed and the upper filling sealing material 5 and the piping are compressed. 3 is separated. At this time, since the filling sealing material 5 and the stretchable member 6 are bonded on the entire surface, the stretchable member 6 is stretched in the minimum region, and the stretchable member 6 may be cracked and cut. is there. When the stretchable member 6 is cut, it is difficult to ensure watertightness, and there is a problem that the seal structure cannot perform its original function.

  The present invention has been made in consideration of such circumstances, and its purpose is to inhibit the stretchability of the stretchable member even when the relative positional relationship between the wall portion and the arrangement member varies. There is no need to provide a seal structure that can ensure water tightness.

In order to solve the above problems, the present invention provides the following means.
That is, the seal structure of the present invention includes a wall portion in which a through hole is formed between a front surface on the indoor side and a back surface on the outdoor side, a disposing member for inserting the through hole, and an inner portion of the through hole. A seal portion that seals between the peripheral surface and the outer peripheral surface of the arrangement member, and the seal portion is filled between the inner peripheral surface of the through hole and the outer peripheral surface of the arrangement member, and is watertight A sealing material that secures safety, and an expansion / contraction that is disposed on the outdoor side of the filling sealing material, the outer peripheral side is fixed to the inner peripheral surface of the through-hole, and the inner peripheral side is fixed to the outer peripheral surface of the arrangement member And a breaker material provided between the filling sealing material and the stretchable member and allowing relative movement of the filling sealing material and the stretchable member in a direction perpendicular to the arrangement member. wherein the elastic member is a relative position displacement between the deployment member and the wall portion Supporting and deformed, and having a watertight.

  According to the above configuration, even when the relative positional relationship between the wall portion and the arrangement member changes, the breaker material allows the relative movement between the filling seal material and the elastic member, thereby allowing the elastic member to move. Since the stretchability is not hindered, the water tightness of the seal structure can be ensured.

In the above seal structure, it is preferable that the breaker material has a plate shape having a predetermined thickness in the extending direction of the arrangement member.
According to the said structure, introduction | transduction of the breaker material with respect to a seal structure can be implemented easily.

  In the sealing structure, the breaker material includes a first breaker material disposed on the filling seal material side and a second breaker material disposed on the stretchable member side, and the first breaker material and the first breaker material The double breaker material preferably has a plate shape having a predetermined thickness in the extending direction of the arrangement member.

  According to the above configuration, when the relative positional relationship between the wall portion and the arrangement member varies, the first breaker material and the second breaker material are at the interface between the first breaker material and the second breaker material. Slip positively. That is, since the relative movement between the first breaker material and the second breaker material is allowed, even if the relative movement between the elastic member or the filling seal material and the breaker material is not allowed, the elastic member The possibility of being cut can be further reduced.

  In the above seal structure, the breaker material is preferably formed of foamed polyethylene.

In addition, the method for forming a seal structure of the present invention includes a wall portion in which a through hole is formed between a surface on the indoor side and a back surface on the outdoor side, a disposing member for inserting the through hole, and the penetrating hole. A seal portion that seals between the inner peripheral surface of the hole and the outer peripheral surface of the arrangement member, and the seal portion is filled between the inner peripheral surface of the through hole and the outer peripheral surface of the arrangement member. A sealing material that ensures watertightness, and the outer side of the filling sealing material is fixed to the inner peripheral surface of the through hole and the inner peripheral side is fixed to the outer peripheral surface of the arrangement member. And a stretchable member having a watertight property that is deformed following the relative positional displacement between the wall portion and the arrangement member, wherein the filling sealant and the stretchable member are formed. Between the sealing member and the disposing member between the filling member and the elastic member. It characterized by having a step of placing the breaker member to allow relative movement in a direction.

  According to the present invention, even when the relative positional relationship between the wall portion and the arrangement member varies, the breaker material allows the relative movement between the filling sealing material and the elastic member, thereby allowing the elastic member to move. Since the stretchability is not hindered, the water tightness of the seal structure can be ensured.

It is sectional drawing of the building principal part which employ | adopted the seal structure which concerns on 1st embodiment of this invention. It is sectional drawing which shows that the relative displacement produced between the wall part and piping in the seal structure which concerns on 1st embodiment of this invention. It is sectional drawing of the principal part of the building explaining the formation method of the seal structure concerning a first embodiment of the present invention. It is sectional drawing of the building principal part which employ | adopted the seal structure which concerns on 2nd embodiment of this invention. It is sectional drawing of the principal part of a building explaining the formation method of the seal structure which concerns on 2nd embodiment of this invention. It is sectional drawing of the building principal part which employ | adopted the seal structure which concerns on 3rd embodiment of this invention. It is sectional drawing which shows that the relative displacement produced between the wall part and piping in the seal structure which concerns on 3rd embodiment of this invention. It is sectional drawing of the building principal part which employ | adopted the conventional seal structure. It is sectional drawing which shows that the relative displacement produced between the wall part and piping in the conventional seal structure.

(First embodiment)
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
As shown in FIG. 1, a through hole 2 is formed in a wall portion 1 constituting an outer wall of a building or the like. The through-hole 2 penetrates across the surface on the outdoor side of the wall portion 1 and the back surface on the indoor side, whereby the pipe 3 is inserted across the indoor and outdoor.

  The wall portion 1 is made of concrete or the like, and has a thickness dimension sufficient to withstand a predetermined water pressure. The inner diameter of the through-hole 2 is a hole having a circular cross section that is determined in the pipe 3 based on design specifications such as dimensions. The pipe 3 is a circular pipe member made of metal. The pipe 3 is disposed substantially at the center of the through hole 2 when viewed from the axial direction of the pipe 3 (hereinafter simply referred to as the axial direction). However, the through hole 2 does not have to be circular in cross section, and may be a rectangular hole, for example, but a shape close to a circle is preferable.

  Between the pipe 3 and the through hole 2, a seal portion 4 that seals between the inner peripheral surface of the through hole 2 and the outer peripheral surface of the pipe 3 is formed. The seal portion 4 includes a filling sealing material 5 filled in the axially indoor side of the through hole 2, an elastic member 6 filled in the axially outdoor side of the through hole 2, and the filling sealing material 5 and the elastic member 6. Breaker material 8 provided between the two.

  The filling sealing material 5 is made of an elastic foam material having heat resistance according to the temperature of the fluid passing through the inside of the pipe 3, the temperature inside the building, and the like, and between the inner peripheral surface of the through hole 2 and the pipe 3. After being filled in a liquid state, the water-tightness between the inner peripheral surface of the through hole 2 and the pipe 3 is ensured by curing. In the present embodiment, an elastic foam material such as urethane is used from the viewpoint of ensuring watertightness.

The stretchable member 6 is disposed on the outdoor side of the filling sealing material 5, the outer peripheral side is fixed to the inner peripheral surface of the through hole 2, and the inner peripheral side is fixed to the outer peripheral surface of the pipe 3, and has high stretchability. It is made of material.
Further, a primer 7 is interposed between the elastic member 6 and the pipe 3 and between the elastic member 6 and the through hole 2. In other words, the stretchable member 6 is filled in a state in which the primer 7 as a base is applied to the inner peripheral surface of the through hole 2 and the outer peripheral surface of the pipe 3.

  The stretchable member 6 is a sealing material having high stretchability (elasticity), and the stretchable member 6 of this embodiment is formed of a silicon sealant. That is, the elastic member 6 has the performance of following the movement of the pipe 3 even when the distance between the pipe 3 and the through hole 2 changes due to the movement of the pipe 3 after construction.

  The primer 7 is a base material applied to improve the adhesiveness between the elastic member 6 and the through-hole 2 and the adhesiveness between the elastic member 6 and the pipe 3. The primer 7 is appropriately selected according to the object to which the stretchable member 6 is bonded. For example, the primer 7 applied between the through-hole 2 made of concrete and the stretchable member 6 is a primer 7 in which a silicone-modified urethane resin is dissolved in a butyl acetate solvent (for example, Momentive, Tosplime). C (registered trademark)) is preferred.

The primer 7 applied between the metal pipe 3 and the stretchable member 6 is a primer 7 in which a silane resin is dissolved with a solvent composed of acetone, IPA, and toluene (for example, Momentive, Tosplime). D (registered trademark)) is preferred.
Further, the primer 7 can be omitted if either the adhesiveness between the elastic member 6 and the through hole 2 or the adhesiveness between the elastic member 6 and the pipe 3 or both are sufficient.

  Further, the pipe 3 is not limited to metal, and resin such as vinyl chloride or concrete can be employed. For example, when vinyl chloride is used as the pipe 3, the primer 7 between the pipe 3 and the stretchable member 6 needs to be a component that improves the adhesion and durability between the resin and the stretchable member 6.

  The breaker material 8 is a member that allows relative movement of the filling seal material 5 and the elastic member 6 in a direction perpendicular to the pipe 3, covers one surface of the filling seal material 5 in the axial direction outdoor side, and is also an elastic member. 6 is interposed between the filling sealing material 5 and the elastic member 6 so as to cover one surface in the axial direction indoor side.

  The breaker material 8 is a plate-shaped disk-shaped member that is formed of foamed polyethylene and has a predetermined thickness in the extending direction of the pipe 3. Specifically, the breaker material 8 is a disk-like member in which a circular hole for inserting the pipe 3 is formed at the center, and the hole for the pipe 3 is substantially the same as the outer diameter of the pipe 3. It is formed slightly larger than the outer diameter of the pipe 3. The outer diameter of the breaker material 8 is substantially the same as the inner diameter of the through hole 2 or slightly smaller than the inner diameter of the pipe 3.

Next, the construction method of the seal structure of this embodiment will be described.
First, the filling sealing material 5 is filled between the pipe 3 and the through hole 2 and on the indoor side of the through hole 2. Next, the breaker material 8 is attached so as to come into contact with the outdoor side surface of the filling sealing material 5. Next, the primer 7 is applied to the stretchable member 6 construction portion on the inner peripheral surface of the through hole 2 and the stretchable member 6 construction portion on the outer peripheral surface of the pipe 3.
Next, the stretchable member 6 is applied on the indoor side in the axial direction of the filling sealing material 5. And the sealing structure is completed when the elastic member 6 hardens | cures.

  According to the above embodiment, as shown in FIG. 2, for example, even when the relative positional relationship between the wall portion 1 and the pipe 3 is changed due to the occurrence of an earthquake, the breaker material 8 is stretchable with the filling seal material 5. Relative movement with the member 6 is allowed. That is, as seen above the pipe 3 in FIG. 2, even when the pipe 3 and the filling sealing material 5 are separated from each other, the stretchable member 6 is not affected by the filling sealing material 5 and the wall portion 1 and the piping. 3 can follow the relative deformation.

On the other hand, as seen below the pipe 3 in FIG. 2, when the filling sealing material 5 and the elastic member 6 receive a compressive force, the breaker material 8 is deformed between the filling sealing material 5 and the elastic member 6. Can follow.
That is, when the pipe 3 moves in a direction away from the inner peripheral surface of the through hole 2 and when moved in the approaching direction, the stretchability of the stretchable member 6 is hindered over the entire circumference of the pipe 3. Therefore, the water tightness of the seal structure can be ensured.

  Further, since the primer 7 is interposed between the elastic member 6 and the through-hole 2 and between the elastic member 6 and the pipe 3, even when the elastic member 6 receives a tensile force. Adhesiveness is maintained, and a gap is not generated between the elastic member 6.

  In addition, if the material which comprises the breaker material 8 is hold | maintained between the filling sealing material 5 and the elastic member 6, and permits the relative movement of the filling sealing material 5 and the elastic member 6, The foamed polyethylene sheet is not limited. For example, it is good also as a structure which apply | coats a wax between the filling sealing material 5 and the elastic member 6, and it is good also as a structure which affixes the film of a polytetrafluoroethylene, and uses release paper like silicone processing paper. May be.

Moreover, in this embodiment, although the silicon sealant was used as the elastic member 6 provided on the axial direction outdoor side of the filling sealer 5 and the breaker material 8, the member provided here has high elasticity, and The material is not limited to this as long as the material has water tightness.
For example, as the stretchable member 6, for example, a polybutadiene-based liquid rubber 14 can be employed. When the liquid rubber 14 is applied, first, the liquid rubber 14 is applied to the outdoor side of the filling sealer 5 and the breaker material 8 after the primer 7 is processed. Next, as shown in FIG. 3, the shape of the liquid rubber 14 is adjusted by bringing a hard plate 15 corresponding to the shape of the through-hole 2 into contact with the outer side so that the liquid rubber 14 does not flow out. However, when the fluidity of the liquid rubber 14 is high, the hard plate 15 is disposed in advance to prevent the liquid rubber 14 from flowing out. The liquid rubber 14 is cured to complete the seal structure.

  Moreover, as the elastic member 6, a rubber-like sheet | seat can also be employ | adopted. When constructing a rubber sheet, first, an adhesive is applied to the inner peripheral surface of the through hole 2 and the pipe 3. Next, a rubber-like sheet is attached between the pipe 3 and the through-hole 2, and the rubber-like sheet and the pipe 3 and the rubber-like sheet and the through-hole 2 are bonded. Then, the seal structure is completed by curing the adhesive.

  Further, in the case where the stretchable member 6 including the breaker material 8 of the present embodiment is applied to the existing seal structure, when the existing filling seal material 5 does not have sufficient axial thickness, After the additional filling seal material 5 is constructed, the breaker material 8 and the stretchable member 6 can be constructed. That is, it can be easily applied to an existing seal structure.

(Second embodiment)
Next, the seal structure according to the second embodiment will be described.
FIG. 4 is a step view showing an example of the seal structure according to the present embodiment. In the present embodiment, differences from the first embodiment described above will be mainly described, and description of similar parts will be omitted.

As shown in FIG. 4, the stretchable member 6 </ b> B of the present embodiment has a reduced axial thickness except for an adhesive portion with the through hole 2 and an adhesive portion with the pipe 3. That is, the stretchable member 6 </ b> B has a thin intermediate portion while ensuring a sufficient adhesion area between the through hole 2 and the pipe 3.
Moreover, when constructing such a stretchable member 6B, a part of the stretchable member is removed so that the central portion of the stretchable member becomes thin before the stretchable member 6B is cured. Alternatively, the elastic member 6B may be formed by molding using the second hard plate 16 conforming to the shape of the elastic member 6B as shown in FIG.

  According to the embodiment, by reducing the thickness of the central portion of the stretchable member 6B, the wall portion 1 of the stretchable member 6B can be secured while securing the adhesion area to the through hole 2 and the pipe 3 of the stretchable member 6B. The followability to the relative deformation of the pipe 3 can be improved.

  As in the first embodiment, the liquid rubber 14 can be employed as the stretchable member 6B.

(Third embodiment)
Next, the seal structure according to the third embodiment will be described.
As shown in FIG. 6, the breaker material 8 of the present embodiment includes a first breaker material 11 arranged on the filling sealer 5 side and a second breaker material 12 arranged on the stretchable member 6 side. It consists of a single piece of breaker material 8.
That is, the first breaker material 11 is in contact with the surface on the outdoor side of the filling sealing material 5 and is sandwiched between the filling sealing material 5 and the second breaker material 12. The second breaker material 12 is in contact with the indoor surface of the stretchable member 6, and is sandwiched between the first breaker material 11 and the stretchable member 6.

  According to the said embodiment, as shown in FIG. 7, when the relative positional relationship of the wall part 1 and the piping 3 fluctuates, it expands and contracts with the 1st breaker material 11 arrange | positioned so that the filling sealing material 5 may be contact | abutted. The second breaker material 12 disposed so as to abut against the sexual member 6 is positively slid at the interface between the first breaker material 11 and the second breaker material 12. That is, in the unlikely event that relative movement is not allowed between the elastic member 6 or the filling sealer 5 and the breaker material 8, relative movement between the first breaker material 11 and the second breaker material 12 is allowed. Therefore, the possibility that the elastic member 6 is cut can be further reduced.

In the above embodiment, the two breaker materials 8 are used as the breaker material 8, but the present invention is not limited to this, and a configuration in which three or more breaker materials 8 are provided may be employed.
Further, the seal structure of the present embodiment may be a combination of the two breaker members 8 of the third embodiment and the thin central portion of the second embodiment.

  The technical scope of the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention. For example, in each of the embodiments described above, the pipe 3 is used as a disposing member that passes through the through hole 2, but the present invention is not limited to this, and the present invention can be applied to any member that extends in and out of the building such as a duct. The invention can be applied.

DESCRIPTION OF SYMBOLS 1 ... Wall part 2 ... Through-hole 3 ... Piping (arrangement member) 4 ... Seal part 5 ... Filling sealing material 6 ... Stretchable member 7 ... Primer 8 ... Breaker material 11 ... First breaker material 12 ... Second breaker material 14 ... Liquid rubber 15 ... Hard plate 16 ... Second hard plate

Claims (15)

A wall portion having a through hole formed between the indoor side surface and the outdoor side back surface;
An arrangement member for inserting the through hole;
A seal portion that seals between an inner peripheral surface of the through hole and an outer peripheral surface of the arrangement member;
The seal portion is
A filling sealing material that is filled between the inner peripheral surface of the through hole and the outer peripheral surface of the arrangement member to ensure watertightness ;
A stretchable member disposed on the outdoor side of the filling sealing material, the outer peripheral side being fixed to the inner peripheral surface of the through hole and the inner peripheral side being fixed to the outer peripheral surface of the arrangement member;
A breaker material provided between the filling sealing material and the stretchable member, and allowing relative movement of the filling sealing material and the stretchable member in a direction perpendicular to the arrangement member ;
The seal structure is characterized in that the stretchable member is deformed following a relative positional displacement between the wall portion and the arrangement member and has water tightness .   The seal structure according to claim 1, wherein the breaker material has a plate shape having a predetermined thickness in an extending direction of the arrangement member.   The breaker material comprises a first breaker material disposed on the filling sealer side and a second breaker material disposed on the stretchable member side, and the first breaker material and the second breaker material are The seal structure according to claim 1, wherein the seal member has a plate shape having a predetermined thickness in the extending direction of the arrangement member. A wall portion having a through hole formed between the indoor side surface and the outdoor side back surface;
An arrangement member for inserting the through hole;
A seal portion that seals between an inner peripheral surface of the through hole and an outer peripheral surface of the arrangement member;
The seal portion is
A filling sealing material filled between the inner peripheral surface of the through hole and the outer peripheral surface of the arrangement member;
A stretchable member disposed on the outdoor side of the filling sealing material, the outer peripheral side being fixed to the inner peripheral surface of the through hole and the inner peripheral side being fixed to the outer peripheral surface of the arrangement member;
A breaker material provided between the filling sealing material and the stretchable member, and allowing relative movement of the filling sealing material and the stretchable member in a direction perpendicular to the arrangement member ;
The breaker material comprises a first breaker material disposed on the filling sealer side and a second breaker material disposed on the stretchable member side, and the first breaker material and the second breaker material are A seal structure having a plate shape having a predetermined thickness in the extending direction of the arrangement member . The seal structure according to any one of claims 1 to 4 , wherein the breaker material is formed of foamed polyethylene. A wall portion having a through hole formed between the indoor side surface and the outdoor side back surface;
An arrangement member for inserting the through hole;
A seal portion that seals between an inner peripheral surface of the through hole and an outer peripheral surface of the arrangement member;
The seal portion is
A filling sealing material that is filled between the inner peripheral surface of the through hole and the outer peripheral surface of the arrangement member to ensure watertightness ;
A stretchable member disposed on the outdoor side of the filling sealing material, the outer peripheral side being fixed to the inner peripheral surface of the through hole and the inner peripheral side being fixed to the outer peripheral surface of the arrangement member;
A breaker material provided between the filling sealing material and the stretchable member, and allowing relative movement of the filling sealing material and the stretchable member in a direction perpendicular to the arrangement member ;
The said breaker material is formed with the foamed polyethylene, The seal structure characterized by the above-mentioned . The seal structure according to claim 2 , wherein the breaker material has a plate shape having a predetermined thickness in an extending direction of the arrangement member. The stretchable member according to any one of claims 1 to 7, wherein a primer for improving adhesiveness is interposed between the through hole and the arrangement member. Seal structure. A wall portion having a through hole formed between the indoor side surface and the outdoor side back surface;
An arrangement member for inserting the through hole;
A seal portion that seals between an inner peripheral surface of the through hole and an outer peripheral surface of the arrangement member;
The seal portion is
A filling sealing material that is filled between the inner peripheral surface of the through hole and the outer peripheral surface of the arrangement member to ensure watertightness ;
An elastic member disposed on the outdoor side of the filling sealing material, and having an outer peripheral side fixed to the inner peripheral surface of the through-hole and an inner peripheral side fixed to the outer peripheral surface of the arrangement member. A forming method comprising:
Between the filling sealing material and the stretchable member, there is a step of disposing a breaker material that allows relative movement of the filling sealing material and the stretchable member in a direction perpendicular to the arrangement member,
The method for forming a seal structure, wherein the stretchable member is deformed following a relative positional displacement between the wall portion and the arrangement member and has water tightness . The method for forming a seal structure according to claim 9 , wherein the breaker material has a plate shape having a predetermined thickness in an extending direction of the arrangement member. The breaker material comprises a first breaker material disposed on the filling sealer side and a second breaker material disposed on the stretchable member side, and the first breaker material and the second breaker material are The method for forming a seal structure according to claim 9 , wherein a plate shape having a predetermined thickness is formed in an extending direction of the arrangement member. A wall portion having a through hole formed between the indoor side surface and the outdoor side back surface;
An arrangement member for inserting the through hole;
A seal portion that seals between an inner peripheral surface of the through hole and an outer peripheral surface of the arrangement member;
The seal portion is
A filling sealing material filled between the inner peripheral surface of the through hole and the outer peripheral surface of the arrangement member;
An elastic member disposed on the outdoor side of the filling sealing material, and having an outer peripheral side fixed to the inner peripheral surface of the through-hole and an inner peripheral side fixed to the outer peripheral surface of the arrangement member. A forming method comprising:
Wherein between the packing seal member and the elastic member, have a step of arranging the breaker member to allow the orthogonal direction of relative movement of the mounting member with the stretchable member and these filling sealant,
The breaker material comprises a first breaker material disposed on the filling sealer side and a second breaker material disposed on the stretchable member side, and the first breaker material and the second breaker material are A method of forming a seal structure, characterized in that it has a plate shape having a predetermined thickness in the extending direction of the arrangement member . The method for forming a seal structure according to any one of claims 9 to 12 , wherein the breaker material is formed of foamed polyethylene. A wall portion having a through hole formed between the indoor side surface and the outdoor side back surface;
An arrangement member for inserting the through hole;
A seal portion that seals between an inner peripheral surface of the through hole and an outer peripheral surface of the arrangement member;
The seal portion is
A filling sealing material filled between the inner peripheral surface of the through hole and the outer peripheral surface of the arrangement member;
An elastic member disposed on the outdoor side of the filling sealing material, and having an outer peripheral side fixed to the inner peripheral surface of the through-hole and an inner peripheral side fixed to the outer peripheral surface of the arrangement member. A forming method comprising:
Wherein between the packing seal member and the elastic member, have a step of arranging the breaker member to allow the orthogonal direction of relative movement of the mounting member with the stretchable member and these filling sealant,
The said breaker material is formed with the foamed polyethylene, The formation method of the seal structure characterized by the above-mentioned . The method for forming a seal structure according to claim 14 , wherein the breaker material has a plate shape having a predetermined thickness in the extending direction of the arrangement member.

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