JP2018031250A - Gasket for joint part of exterior wall material and waterproof structure for exterior wall material comprising the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gasket for a joint part of an exterior wall material, which can prevent leakage of water and air to an indoor side from the exterior wall material by improving the watertightness and airtightness of the joint part of the exterior wall material.SOLUTION: A gasket for a joint part of an exterior wall material is used for the joint part of the exterior wall material. The gasket has a predetermined length that is extended along the joint part of the exterior wall material. Its cross-sectional shape comprises a rectangular base and a triangular apex. The triangular apex, which has a central part provided with a recess, is pressed against the exterior wall material to deform the apex.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a gasket used as a seal material in a joint portion of an outer wall material and a waterproof structure of the outer wall material provided with the gasket.

  Conventionally, an extruded cement board or the like is used as an outer wall material of a building. Extruded cement board is hollow and lightweight, and has high strength, and has recently been widely used as an outer wall material. Hereinafter, an extruded cement board will be described as an example of the outer wall material.

  FIG. 12 is a cross-sectional view showing a conventional waterproof structure of an outer wall material. When the extruded cement plates 100 and 101 are used for the outer wall material, the extruded cement plates 100 and 101 are attached to the base material 121 of the casing 120 with the Z clip 130. The Z clip 130 is attached to a square nut 131 inserted into the hollow portion 102 of the extruded cement plates 100 and 101 with a fixing bolt 132. And in order to waterproof the horizontal joint part 110 between the extrusion-molded cement boards 100 and 101, the draining plate 111 extended in the horizontal direction of the joint part 110 is provided (refer FIG. 4 mentioned later for the detail of a draining plate). . The draining plate 111 is disposed on the upper surface of the base material 121. A hard packing 115 for adjusting the space between the base material 121 and the extruded cement plate 100 is provided between the draining plate 111 and the extruded cement plate 100. The drooping portion 112 positioned outside the extruded cement plate 100 of the draining plate 111 is provided with a backup material 113 in which a water passage portion penetrating in the vertical direction is formed. And the sealing material 114 which plugs up the joint part 110 is filled in the front side of the backup material 113.

  When the outer wall material is the extrusion-molded cement boards 100 and 101, the filling thickness of the sealing material 114 is limited because of the hollow portion 102. And as shown in FIG. 13, even if the water W intrudes into the inside from the joint portion 110, the water W is discharged downward using the hollow portion 102 to prevent the water W from entering the indoor side. Therefore, the watertight performance is improved as a secondary waterproof structure provided with the draining plate 111. In the specification and claims, the outer surface of the extruded cement plates 100 and 101 is “front surface”, the outer space on the front surface side is “outside”, the inner surface is “back surface”, and the inner surface on the back surface side. The space is called “inside the room”.

  In addition, as a waterproof structure of the joint part using the draining plate 111, there exists a thing of patent document 1, for example. Moreover, there exists a thing of patent document 2 as a prior art which attaches an extrusion-molded cement board with the Z clip 130, for example.

JP 2003-343023 A Japanese Patent Laid-Open No. 9-60191

  By the way, the conventional waterproof structure of the extrusion-molded cement board is a structure that mainly prevents water leakage on the surface side of the extrusion-molded cement boards 100 and 101. As shown in FIG. Some leakage of air A from the weakly airtight portion to the indoor side of the extruded cement plates 100 and 101 was allowed. However, when the sealing material 114 on the surface side of the extruded cement plates 100 and 101 is severely deteriorated, the amount of air leakage to the indoor side of the extruded cement plates 100 and 101 increases as the outdoor wind pressure increases. End up. Then, for example, rainwater or the like flows from the contact surface between the extruded cement board 101 and a packing material such as rock wool 116 provided in the lower part of the bolt through hole 133 of the fixing bolt 132 or the base material 121 by flowing backward in the hollow portion 102. There is a risk that W (hereinafter simply referred to as “water W”) leaks to the back side of the extruded cement plates 100 and 101. Thus, when the outer sealing material 114 is significantly deteriorated, the waterproof performance of the outer wall is deteriorated. Therefore, it is necessary to repair the problem of the surface side sealing material 114 each time. However, although repairing of the outer sealing material 114 is relatively easy in middle- and low-rise buildings, there is also a problem that it is difficult to find and repair trouble spots in high-rise buildings.

  On the other hand, in the above-described longitudinal stretching of the extruded cement plates 100 and 101 (how to form the outer wall with the extrusion direction (longitudinal direction) of the extruded cement plate being the longitudinal direction), the extruded cement plate 100 is subjected to displacement between layers. A locking block is also installed at the lower part of the center part in the width direction of the extrusion-molded cement plates 100 and 101 so that the rocks 101 and 101 can be smoothly locked. In this case, the width (interval in the vertical direction) of the joint portion 110 is increased by the thickness of the locking block. For this reason, since the filling area of the sealing material 114 also increases, considering the deterioration of the sealing material 114, it is necessary to further improve the watertight performance by the secondary waterproof structure.

  In Patent Document 1, water that has entered the hollow portion of the upper extruded cement plate can be effectively discharged into the hollow portion of the lower extruded cement plate, but is blown when the wind pressure increases. There is a possibility that the water that has entered from the upper end of the extruded cement board by the air flows back through the draining plate and enters the indoor side. Furthermore, there is a risk that rainwater or the like may enter the back side of the extruded cement plate from the contact surface between the packing material such as rock wool and the extruded cement plate provided in the lower part of the base material by flowing back in the hollow portion. Patent Document 2 does not describe any waterproof structure in the joint.

  Accordingly, the present invention provides a joint gasket for an outer wall material that can improve water tightness and air tightness at the joint portion of the outer wall material and prevent leakage of water and air from the outer wall material to the indoor side. It aims at providing the waterproof structure provided with. It is another object of the present invention to provide a waterproof structure that maintains watertight performance and does not deteriorate the function as an outer wall material even if a problem occurs in the outer sealing material.

  In order to achieve the above object, a gasket for a joint part of an outer wall material according to the present invention is a gasket for a joint part of an outer wall material used for a joint part of the outer wall material, and extends along the joint part of the outer wall material. It has a length, a cross-sectional shape has a rectangular base and a triangular top, and the triangular top has a recess in the central part, and the top is pressed against the outer wall material. It is configured to be deformed.

  With this configuration, the triangular top in the cross-sectional shape and the concave portion are used so as to contact the outer wall material, so that only the triangular top portion is deformed when closely contacting the outer wall material, and the rectangular base portion maintains the shape by the concave portion. As it is, the triangular portion is flattened and is in close contact with the outer wall material. Thereby, the adhesiveness of a gasket can be improved. Therefore, it is possible to improve the watertight performance and the airtight performance in the joint portion of the outer wall material.

  Further, the joint gasket for the other outer wall material is a gasket for the joint portion of the outer wall material used for the joint portion of the outer wall material, has a predetermined length extending along the joint portion of the outer wall material, and has a cross section. The shape is formed so as to have a substantially V-shaped bent portion, and the bent portion is configured such that an end portion away from the bent portion is deformed close to the bent portion when inserted into the joint portion.

  With this configuration, the gasket having a substantially V-shaped cross-section is deformed so that the end away from the bent portion is close to the joint when inserted into the joint. Will increase. Furthermore, since it becomes a substantially U-shaped cross section toward the inside of the joint after insertion into the joint, it can be returned to the direction in which the air flows backward. Therefore, it is possible to improve the watertight performance and the airtight performance in the joint portion of the outer wall material.

  On the other hand, the waterproof structure of the outer wall material according to the present invention includes at least one of the gaskets for the joint portion of the outer wall material in the joint portion of the outer wall material.

  With this configuration, the waterproof structure in the joint portion of the outer wall material is a waterproof / airtight structure including either or both of the gaskets for the joint portion of the outer wall material, and the water tightness in the joint portion of the outer wall material after the wall surface is formed. Performance and airtightness can be improved.

  Further, the outer wall material may be an extruded cement board.

  If comprised in this way, even when an outer wall material is an outer wall material which is difficult to ensure a sealing part like an extrusion-molded cement board, the watertight performance and airtight performance in a joint part can be improved.

  Further, the outer wall material is an extrusion cement board, and water dripping from the hollow part of the extrusion cement board above the joint part is dropped on the joint part of the extrusion cement board. A drainage plate that leads to a hollow portion, the drainage plate is disposed on a base material that supports the extruded cement plate from below, and the base portion and the top portion are disposed between the drainage plate and the extruded cement plate. The joint gasket, and the base portion of the joint gasket is adhered to the draining plate or the extrusion cement plate, and the top portion of the joint gasket is the extrusion cement plate or the You may comprise so that it may press on a draining plate.

  If comprised in this way, the drainage plate is provided in the joint part of an extrusion-molded cement board, the gasket for joint parts which has a base part and a top part is arrange | positioned between the drainage plate and an extrusion-molding cement board, and the gasket for joint parts By pressing the top of the sheet toward the extrusion-molded cement plate or the draining plate, it is possible to improve the water-tightness and air-tightness of the drainage by the draining plate and the joint portion of the extrusion-molded cement plate.

  Moreover, you may further provide the said gasket for joint parts which has a bending part between the base material which supports the said extrusion-molded cement board from the downward direction, and the said extrusion-molded cement board.

  If comprised in this way, the seal | sticker of the upper part of the lower extrusion-molded cement board in a joint part will change the gasket for joint parts which has a V-shaped bending part into U shape, and a base material and an extrusion-molded cement board It can be done properly by inserting between the two.

  Further, an airtight gasket may be further provided between the hollow portion of the extruded cement board and a fixing member for fixing the extruded cement board to the housing.

  According to this structure, in the waterproof structure of the extruded cement board, even in the portion where the extruded cement board is fixed to the housing by the airtight gasket provided between the hollow portion of the extruded cement board and the fixing member, Performance and airtightness can be improved. That is, when all the inner gaps in the joint portion are closed, the air blown into the joint portion under wind pressure increases the air pressure in the hollow portion of the extruded cement plate as well as the inner space of the joint portion, Although there is a risk of leakage or leakage from the weakly airtight portion such as the bolt through hole of the fixing bolt to the indoor side of the extruded cement plate, this leakage or leakage can be prevented.

  ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to aim at the improvement of the watertight performance and the airtight performance in the joint part of an outer wall material. Furthermore, even if a failure occurs in the surface side sealing material, it is possible to maintain the watertight performance and maintain the function as the outer wall material.

1A and 1B are drawings showing a joint gasket according to a first embodiment of the present invention, in which FIG. 1A is a sectional view and FIG. 1B is a partial perspective view. FIG. 2 is a drawing showing a joint gasket according to a second embodiment of the present invention, in which (A) is a cross-sectional view and (B) is a partial perspective view. FIG. 3 is a drawing showing a joint gasket according to a third embodiment of the present invention, where (A) is a cross-sectional view and (B) is a partial perspective view. FIG. 4 is a drawing showing a draining plate used in the waterproof structure of the outer wall material, where (A) is a side view and (B) is a partial perspective view. FIG. 5 is a drawing of a square nut having an airtight gasket according to the first embodiment used in the waterproof structure of the outer wall material of the present invention, (A) is a perspective view, and (B) is a central sectional view. FIG. 6 is a drawing of a square nut having an airtight gasket according to a second embodiment used for the waterproof structure of the outer wall material of the present invention, where (A) is a perspective view and (B) is a central sectional view. FIG. 7 is a partial cross-sectional perspective view showing the waterproof structure of the outer wall material according to the first embodiment of the present invention. FIG. 8 is a cross-sectional view of the waterproof structure of the outer wall material shown in FIG. FIG. 9 is a partial cross-sectional perspective view showing the waterproof structure of the outer wall material according to the second embodiment of the present invention. FIG. 10 is a cross-sectional view of the waterproof structure of the outer wall material shown in FIG. FIG. 11 is a configuration diagram of the performance test apparatus in the waterproof structure of the outer wall material shown in FIGS. FIG. 12 is a cross-sectional view showing a conventional waterproof structure of an outer wall material. 13 is a cross-sectional view schematically showing water leakage in the waterproof structure of the outer wall material shown in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following embodiments, description will be given taking extrusion-molded cement plates 100 and 101 as an example of the outer wall material. Moreover, the waterproof structure of the horizontal joint part 110 extended in the horizontal direction in the vertical stretch which attaches the hollow part 102 extended in the extrusion molding direction of the extrusion-molded cement boards 100 and 101 as an up-down direction is demonstrated to an example. Note that in the vertically stretched extruded cement plates 100 and 101, the vertical direction in which the hollow portion 102 extends is referred to as the vertical direction, and the horizontal direction is referred to as the horizontal direction.

(Configuration of joint gasket according to the first embodiment)
Drawing 1 is a figure showing gasket 10 for the 1st joint part concerning a 1st embodiment, (A) is a sectional view and (B) is a partial perspective view. The first joint gasket 10 according to the first embodiment has a predetermined length extending along the joint 110 of the extruded cement plates 100 and 101, and has a rectangular base 11 and a triangular shape in cross-sectional shape. It has a hollow shape having a top portion 12. And the triangular top part 12 has the recessed part 13 in the center part, and the top part 12 deform | transforms. By setting the cross-sectional shape of the first joint gasket 10 to such a shape, the installation state of the base 11 is stabilized.

  As the material of the first joint gasket 10, PVC (polyvinyl chloride), EP (ethylene / propylene rubber), Si (silicon rubber), EPDM (ethylene / propylene / diene rubber), or the like can be used. In particular, as will be described later, the first joint gasket 10 installed on the draining plate 40 is preferably made of an EPDM solid material having a large compression repulsion force.

  According to the first joint gasket 10, only the triangular top portion 12 is deformed when in close contact with the extruded cement plates 100 and 101. Moreover, the concave portion 13 formed in the top portion 12 can be stably adhered to the extruded cement plates 100 and 101, and the rectangular base portion 11 maintains the shape and maintains a stable state even in the adhered state. Can do. Moreover, the adhesiveness with the extrusion-molded cement boards 100 and 101 can be improved by the force which the deformed part of the top part 12 tends to return. Therefore, it is possible to improve the watertight performance and the airtight performance of the joint portions 110 of the extruded cement plates 100 and 101.

(Configuration of joint gasket according to the second embodiment)
FIG. 2 is a drawing showing a second joint gasket 20 according to the second embodiment, wherein (A) is a cross-sectional view and (B) is a partial perspective view. The gasket 20 for 2nd joint parts which concerns on 2nd Embodiment has the predetermined length extended along the joint part 110 of the extrusion-molded cement boards 100 and 101, and the cross-sectional shape is the bending part 21 of substantially V shape. It is formed to have. In this embodiment, the V shape is 90 °, but the angle of the V shape such as 60 ° and 120 ° is not limited. And it can deform | transform so that the edge part 22 may adjoin from the bending part 21 to the edge part 22 at the time of insertion to the joint part 110. FIG. As the material for the second joint gasket 20, PVC, EP, Si, EPDM or the like can be used.

  According to the second joint gasket 20, when inserted into the joint portion 110, the end portion 22 is deformed so as to be close to the joint portion 110 from the substantially V-shaped bent portion 21 to the end portion 22. Is easy to insert, and after the insertion, the adhesiveness can be enhanced by the force with which the end portion 22 attempts to return. Furthermore, since it becomes a substantially U-shaped cross section toward the inside of the joint portion 110 after being inserted into the joint portion 110, the air flow from the hollow portion 102 can be returned in the reverse direction. Therefore, it is possible to improve the watertight performance and the airtight performance of the joint portions 110 of the extruded cement plates 100 and 101.

(Configuration of joint gasket according to the third embodiment)
3A and 3B are views showing a third joint gasket 30 according to the third embodiment, in which FIG. 3A is a cross-sectional view and FIG. 3B is a partial perspective view. A third joint gasket 30 according to the third embodiment is a modification of the second joint gasket 20. The third joint gasket 30 is also formed to have a predetermined length extending along the joint 110 of the extrusion-molded cement plates 100 and 101 and have a bent portion 31 having a substantially V-shaped cross section. ing. And it can deform | transform so that the edge part 32 may adjoin from the bending part 31 to the edge part 32 at the time of insertion to the joint part 110. FIG. As the material for the third joint gasket 30, PVC, EP, Si, EPDM or the like can be used.

  The third joint gasket 30 is also deformed so that the end portion 32 is close to the end portion 32 from the bent portion 31 to the end portion 32 when inserted into the joint portion 110. It is easy to insert, and after the insertion, the adhesion can be enhanced by the force that the end portion 32 tries to return. Furthermore, after insertion into the joint part 110, the cross-section is substantially U-shaped toward the inside of the joint part 110, so that the air flow from the hollow part 102 can be returned to the reverse direction. Therefore, it is possible to improve the watertight performance and the airtight performance of the joint portions 110 of the extruded cement plates 100 and 101.

(Structure of draining plate)
4A and 4B are drawings showing a draining plate 40 used in the waterproof structure of the extrusion-molded cement plates 100 and 101 (outer wall materials), where FIG. 4A is a side view and FIG. 4B is a partial perspective view. In the side view, the draining plate 40 has a rising portion 41 that rises in the vertical direction inside the extruded cement plates 100 and 101, a horizontal portion 42 that extends in the horizontal direction outward from the lower end of the rising portion 41, and this A hanging portion 43 extending downward from the tip of the horizontal portion 42 is provided. The draining plate 40 can be formed, for example, by bending a stainless plate. A water permeable member 44 having a water passage portion 45 for draining water dripping from above the draining plate 40 downward is provided outside the drooping portion 43.

(Configuration of airtight gasket according to the first embodiment)
FIG. 5 is a drawing of the square nut 131 having the first airtight gasket 50 according to the first embodiment used for the waterproof structure of the extrusion-molded cement boards 100 and 101 (outer wall material), (A) is a perspective view, ) Is a central sectional view. The first hermetic gasket 50 is attached to the surface of the square nut 131 that contacts the extruded cement plates 100 and 101. A female screw 134 into which a fixing bolt (fixing member) 132 (FIG. 8) is screwed is provided at the central portion of the square nut 131, and the first airtight gasket 50 in that portion is a through hole 51. The through hole 51 has a size that allows the fixing bolt 132 to be inserted into the female screw 134.

  The first hermetic gasket 50 is made of a material excellent in conformity to the inner shape of the hollow portion 102 of the square nut 131 or the extruded cement plates 100 and 101, such as foamed rubber or urethane foam. The 1st airtight gasket 50 should just have a shape followable | trackability according to the state of the inner surface shape in the hollow part 102 of the extrusion-molded cement board 100,101.

(Configuration of airtight gasket according to the second embodiment)
FIG. 6 is a drawing of a square nut 135 having a second airtight gasket 55 according to the second embodiment used for the waterproof structure of the extruded cement plates 100 and 101 (outer wall material), (A) is a perspective view, ) Is a central sectional view. The second airtight gasket 55 is attached to the surface of the square nut 135 that contacts the extruded cement plates 100 and 101. In the square nut 135 of this embodiment, a female screw 136 into which a fixing bolt (fixing member) 132 (FIG. 8) is screwed is provided at the center in the width direction, and the second airtight gasket 55 is attached to both sides thereof. It is formed so as to be bent slightly toward the direction. The second hermetic gasket 55 is formed in a size including a portion of the female screw 136 of the square nut 135, and a through hole 56 is provided in the portion of the female screw 136. The through hole 56 has a size that allows the fixing bolt 132 to be inserted.

  The second airtight gasket 55 is also made of a material excellent in conformity to the inner shape of the hollow portion 102 of the square nut 135 or the extruded cement plates 100 and 101, such as foamed rubber or urethane foam. The 2nd airtight gasket 55 should just have a shape followable | trackability according to the state of the inner surface shape in the hollow part 102 of the extrusion-molded cement board 100,101.

(Waterproof structure of outer wall material according to the first embodiment)
7 is a partial cross-sectional perspective view showing the outer wall material waterproof structure 70 according to the first embodiment, and FIG. 8 is a cross-sectional view of the outer wall material waterproof structure 70 shown in FIG. 7. The waterproof structure 70 uses the extruded cement plates 100 and 101 as outer wall materials, and uses the first joint gasket 10 described above as the joint 110. Further, a square nut 131 having the first hermetic gasket 50 is used in the portion of the fixing bolt 132 that fixes the Z clip 130 to the extruded cement plates 100 and 101.

  The upper and lower extrusion-molded cement plates 100 and 101 in this embodiment are attached to a T-shaped base material (CT-shaped steel) 121 attached to a casing 120 with a Z clip 130. A draining plate 40 shown in FIG. 4 is provided at the joint 110 between the upper and lower extruded cement plates 100 and 101. In the draining plate 40, a rising portion 41 and a horizontal portion 42 are arranged on a base material 121 of the upper extruded cement plate 100. The drooping portion 43 depending from the horizontal portion 42 is disposed so as to enter the cut portion 103 formed in the lower extruded cement plate 101. Accordingly, the water W that has entered the hollow portion 102 of the upper extruded cement plate 100 is prevented from leaking into the indoor side from the joint portion 110 of the extruded cement plates 100 and 101, and the water W is horizontal to the draining plate 40. The portion 42 is led to the hanging portion 43 and led to the hollow portion 102 of the lower extruded cement board 101. The sealing material 114 is filled on the outside of the backup material 113 inserted so as to be in contact with the water permeable member 44 provided on the hanging portion 43 of the draining plate 40 from the outdoor side of the extrusion-molded cement plates 100 and 101.

  Further, on the upper surface of the draining plate 40, a block-like rocking block 60 is installed at the center in the width direction of the upper extruded cement board 100. The locking block 60 has a known configuration, and the locking block 60 can be smoothly displaced even if an interlayer displacement occurs in the extruded cement board 100.

  In the waterproof structure 70 of this embodiment, the first joint gasket 10 is attached between the rising portion 41 of the draining plate 40 and the upper extruded cement plate 100. The first joint gasket 10 is attached above the hard packing 115 attached to adjust the space with the base material 121. In the first joint gasket 10, the base portion 11 is previously attached to the rising portion 41 of the draining plate 40 with a double-sided tape, an adhesive, or the like, and the top portion 12 is in contact with the back surface of the extruded cement board 100.

  In addition, a first joint gasket 10 is attached below the hard packing 115 between the lower extruded cement board 101 and the base material 121. In the first joint gasket 10, the base 11 is previously attached to a predetermined position of the base material 121 with a double-sided tape, an adhesive, or the like, and the top 12 is in contact with the back surface of the extruded cement board 101.

  As shown in the figure, the first joint gasket 10 has the base 11 attached to the draining plate 40 or the base material 121, or attached to only one of the extruded cement plates 100 and 101. This prevents the top portion 12 of the first joint gasket 10 from being deformed or damaged when the extruded cement plates 100 and 101 are displaced between layers. Note that rock wool 116 is filled between the upper portion of the lower extruded cement board 101 and the base material 121.

  The first joint gasket 10 attached as described above is in a state in which the top portion 12 is pressed against the back surface of the extruded cement plates 100 and 101. Thereby, the top part 12 of the both sides of the recessed part 13 deform | transforms, and the state which closely_contact | adhered with the extrusion-molded cement boards 100 and 101 is maintained.

  Furthermore, in this embodiment, the 1st airtight gasket 50 is affixed on the square nut 131 which screws the fixing bolt 132 which fixes Z clip 130 which attaches the extrusion-molded cement boards 100 and 101 to the base material 121 (frame 120). ing. As a result, the watertightness and airtightness of the square nut 131 are also improved.

  By using the square nut 131 having the first airtight gasket 50, the watertightness and airtightness can be improved even in the following cases. When a defect occurs in the sealing material 114, the first joint gasket 10 stops air leakage from between the extruded cement plates 100, 101 to the indoor side, so that there is no escape space for air leakage. When the wind pressure on the outdoor side is high, the air pressure rises inside the hollow portion 102 of the extruded cement plates 100 and 101. Therefore, in the mounting method of the extrusion-molded cement plates 100 and 101 in which the square nut 131 is installed in the hollow portion 102 and the Z clip 130 is fixed with the fixing bolt 132, the bolt through hole 133 (FIG. 13) from the portion to the indoor side. Leakage occurs, and in some cases, there is a risk that water may enter the indoor side of the extruded cement plates 100 and 101 together with the leak. However, in this embodiment, as described above, the first airtight gasket 50 is attached to the square nut 131 disposed in the hollow portion 102 of the extruded cement plates 100, 101. It closely adheres to both the square nut 131 and the inner surface of the hollow portion 102 of the extrusion-molded cement plates 100 and 101, and prevents water leakage and air leakage from the bolt through hole 133 (FIG. 13) to the room side. Therefore, it becomes possible to improve the watertightness and airtightness in the portion of the Z clip 130 for attaching the extruded cement plates 100 and 101 to the base material 121 (the casing 120).

  According to the waterproof structure 70 of the first embodiment, the first joint gasket 10 is disposed on the joint 110 of the extruded cement plates 100 and 101, and the extruded cement plates 100 and 101 have the first airtight gasket 50. After being attached with the square nut 131 having the back-up material provided on the drooping portion 43 of the draining plate 40 from the outdoor side of the extruded cement plates 100, 101 to the joints 110 of the upper and lower extruded cement plates 100, 101. Sealing material 114 is filled outside 44. Thereby, the waterproof structure 70 provided with the gasket 10 for joint parts which can maintain watertightness and airtightness appropriately in the joint part 110 of the extrusion-molded cement boards 100 and 101 can be constituted.

  In addition, after inserting the backup material 113 between the vertical joints on the front surface side of the extrusion-molded cement boards 100 and 101, the sealing material 114 is driven, and the vertical gasket 140 is inserted between the vertical joints on the back surface side. . The vertical gasket 140 may be made of a conventional material such as PVC, EP, Si, or EPDM.

(Waterproof structure of the outer wall material according to the second embodiment)
9 is a partial cross-sectional perspective view showing the waterproof structure of the outer wall material according to the second embodiment, and FIG. 10 is a cross-sectional view of the waterproof structure of the outer wall material shown in FIG. This embodiment is an example of a case where the joint gasket at the upper portion of the lower extruded cement plate 101 cannot be attached before the extruded cement plate 101 is attached. In addition, about the structure same as the waterproof structure 70 of the said 1st Embodiment, it is set as simple description.

  In the waterproof structure 71 according to the second embodiment, the extruded cement plates 100 and 101 are used as the outer wall material, and the first joint gasket 10 described above and the second joint gasket 20 described above are used as the joint 110. Is used. Further, a square nut 131 having the first hermetic gasket 50 is used in the portion of the fixing bolt 132 that fixes the Z clip 130 to the extruded cement plates 100 and 101.

  The upper and lower extruded cement plates 100 and 101 in this embodiment are attached to an L-shaped base material 121 (L-shaped steel) attached to a casing 120 with a Z clip 130. A draining plate 40 shown in FIG. 4 is provided at the joint 110 between the upper and lower extruded cement plates 100 and 101. The draining plate 40, the locking block 60, the hard packing 115, and the rock wool 116 are attached in the same manner as in the first embodiment.

  Also in the waterproof structure 71 of this embodiment, the first joint gasket 10 is attached between the rising portion 41 of the draining plate 40 and the upper extruded cement plate 100. The first joint gasket 10 is attached above the hard packing 115 attached to adjust the space with the base material 121. In the first joint gasket 10, the base portion 11 is previously attached to the rising portion 41 of the draining plate 40 with a double-sided tape, an adhesive, or the like, and the top portion 12 is in contact with the back surface of the extruded cement board 100.

  In the waterproof structure 71 of this embodiment, the second joint gasket 20 is inserted between the lower extruded cement plate 101 and the base material 121 that supports the upper extruded cement plate 100. When the second joint gasket 20 is inserted from the interior side of the joint 110, the second joint gasket 20 is inserted while being deformed from a substantially V-shaped section to a U-shape. The second joint gasket 20 inserted into the joint 110 is inserted to a position where the bent portion 21 is substantially flush with the back surface of the extruded cement board 101.

  The second joint gasket 20 inserted by being deformed in this way has a substantially U-shaped cross section in which the bent portion 21 is located inside the joint portion 110 after insertion into the joint portion 110. Since the flow of air A (FIG. 13) can be returned toward the surface side of the extruded cement plate 101, airtightness and watertightness can be maintained. In addition, it replaces with the gasket 20 for 2nd joint parts of this embodiment, and it is the same even if it uses the gasket 30 for 3rd joint parts mentioned above.

  Further, in the waterproof structure 71 of this embodiment, similarly to the above-described embodiment, the square nut for screwing the fixing bolt 132 for fixing the Z clip 130 for attaching the extrusion-molded cement plates 100 and 101 to the base material 121 (the casing 120). A first airtight gasket 50 is attached to 131. As a result, the watertightness and airtightness of the square nut 131 are also improved.

  Therefore, even if the gap is formed in the sealing material 114 by closing all the gaps with the first joint gasket 10 and the second joint gasket 20, even if the internal pressure of the joint 110 is increased due to wind pressure, the extrusion Adhesion at the interface between the molded cement plates 100 and 101 and the second airtight gasket 55 is maintained. In addition, even when the external wind pressure is high, the first airtight gasket 50 of the square nut 131 prevents air leakage from the bolt through hole 133 (FIG. 13) to the indoor side of the extruded cement plates 100 and 101. It is possible to prevent water from entering the indoor side of the extruded cement plates 100 and 101 together with the air.

  According to the waterproof structure 71 of the second embodiment, the outside of the joint portion of the second joint portion gasket 20 is filled with the rock wool 116, and the joint portion 110 outside the extruded cement plates 100 and 101 is filled with A sealing material 114 is filled on the outer side of the backup material 113 inserted so as to be in contact with the water permeable member 44 provided on the hanging portion 43 of the draining plate 40 from the outdoor side of the extruded cement plates 100 and 101. Thereby, the waterproof structure 71 provided with the gaskets 10 and 20 for joint parts which can maintain watertightness and airtightness appropriately in the joint part 110 of the extrusion-molded cement boards 100 and 101 can be comprised.

  The waterproof structure 70 of the first embodiment and the waterproof structure 71 of the second embodiment differ depending on the type (shape) of the base material 121 on which the extrusion-molded cement plates 100 and 101 are applied. A waterproof structure 70 in which the first joint gasket 10 is attached to the base material 121 before mounting, and the second joint gasket from the interior side of the extruded cement plates 100 and 101 after the extrusion cement plates 100 and 101 are mounted. There is a difference from the waterproof structure 71 into which the gasket 20 for the third joint or the third joint portion 30 is inserted.

  As in the first embodiment, after inserting the backup material 113 between the vertical joints on the front surface side of the extruded cement plates 100 and 101, a sealing material 114 is placed, and between the vertical joints on the back surface side. The vertical gasket 140 is inserted.

(Performance test on the waterproof structure of the outer wall material)
FIG. 11 is a configuration diagram of a performance test apparatus in the waterproof structure 70 of the outer wall material shown in FIGS. In the performance test, a sealing material (primary seal) on the outside of the joint portion 110 was assumed to be deteriorated, and a watertight performance test using an airtight box method was performed in a state where a defect was given.

  As an airtight box type test apparatus, the extruded cement plates 100 and 101 having the waterproof structure 70 shown in FIGS. 7 and 8 are fixed to one surface of the pressure box 81 as the outer wall material 80 of the test body. In the case of this test apparatus, it is fixed inside the pressure box 81 so that the outer surface of the outer wall member 80 faces. Water W is sprayed to the outer wall material 80 by a water spraying device 83 from a water spray nozzle 82 installed inside the pressure box 81. Changes in the internal pressure of the pressure box 81 are recorded by a recorder 85 connected via a pressure transducer 84. The inside of the pressure box 81 can be pressurized by supplying air to the inside of the pressure box 81 via the interlocking damper 87 with a blower 86 for pressurization. Further, it is possible to reduce the pressure by discharging the air inside the pressure box 81 through the interlocking damper 87 by the blower 88 for pressure reduction. The internal pressure of the pressure box 81 is fed back to the automatic pressure control device 89 and adjusted by controlling the opening and closing of the interlocking damper 87 by the automatic pressure control device 89. With such a test apparatus, the test was performed with the inner side of the pressure box 81 as the outer surface side of the outer wall member 80 and the outer side of the pressure box 81 as the rear surface side of the outer wall member 80.

<Test results>
In the conventional waterproof structure shown in FIG. 12 described above, when the internal pressure of the pressure box 81 exceeds 3000 Pa, an event of water leakage to the back side (outside of the drawing) of the outer wall member 80 occurred.

  On the other hand, in the waterproof structure 70 shown in FIG. 7 described above, when the first joint gasket 10 is made of EPDM and the first airtight gasket 50 of the square nut 131 is made of urethane foam, the pressure box 81 No leakage of water to the back side (outside of the figure) of the outer wall material 80 occurred until the internal pressure reached 3500 Pa. Furthermore, even when the internal pressure was increased to 5000 Pa, the water was only slightly oozed out to the back side (outside of the figure) of the outer wall material 80, and there was no occurrence of an event that the water flowed out or splashed up. . Even when the first hermetic gasket 50 was changed from urethane foam to hard rubber, the amount of water oozing out to the back side of the outer wall member 80 was clearly small.

(Summary)
As described above, according to the joint gaskets 10, 20, 30 of the extruded cement plates (outer wall materials) 100, 101, the state of being in close contact with the extruded cement plates (outer wall materials) 100, 101 is stabilized. Thus, airtightness and watertightness inside the joint 110 can be improved, and water leakage and air leakage to the back side of the extruded cement plates 100 and 101 can be prevented appropriately.

  And according to the waterproof structure 70,71 of the extrusion-molded cement board (outer wall material) 100,101 provided with this gasket for joint part 10,20,30, the joint part of the extrusion-molded cement board (outer wall material) 100,101. Since 110 can maintain high water tightness and air tightness, it is possible to improve water tightness and air tightness as an outer wall.

  Further, as a part of the waterproof structure 70, 71, if the square nut 131 for attaching the extruded cement plates 100, 101 to the housing 120 is provided with the airtight gaskets 50, 55, water leakage and leakage from the bolt through-hole 133 portion are achieved. Air can be prevented appropriately, and the watertightness and airtightness of the entire outer wall material can be improved.

  In addition, according to the waterproof structures 70 and 71 described above, even when a locking block is installed on the extrusion-molded cement plates 100 and 101 and the width of the joint portion 110 is widened, it is possible to improve the watertight performance and the airtight performance. It becomes.

  In the above-described embodiment, the extrusion-molded cement plates 100 and 101 are described as an example of the outer wall material. However, the joint gaskets 10, 20, and 30 may be used for outer wall materials other than the extrusion-molded cement plates 100 and 101. The outer wall material is not limited to the extruded cement plates 100 and 101.

  In the above-described embodiment, the example in which the extrusion-molded cement plates 100 and 101 are fixed to the base material 121 (the casing 120) with the Z clip 130 has been described. The fixing method of the cement boards 100 and 101 is not limited to the said embodiment.

  Furthermore, the above-described embodiment shows an example, and various modifications can be made without departing from the gist of the present invention, and the present invention is not limited to the above-described embodiment.

10 1st joint gasket
11 Base
12 Top
13 recess
20 Second joint gasket
21 Bending part
22 end
30 Gasket for third joint
31 Bent part
32 edge
40 Draining plate
50 1st airtight gasket
55 Second airtight gasket
60 Locking block
70 Waterproof structure
71 Waterproof structure 100 Extruded cement board (outer wall material)
101 Extruded cement board (outer wall material)
102 Hollow portion 110 Joint portion 120 Housing 121 Base material 130 Z clip 131, 135 Square nut 132 Fixing bolt (fixing member)
133 Bolt through hole
W Water

Claims (7)

A gasket for the joint portion of the outer wall material used for the joint portion of the outer wall material,
Having a predetermined length extending along the joint portion of the outer wall material,
The cross-sectional shape has a rectangular base and a triangular top,
The triangular top has a recess in the center and is configured to be deformed by pressing against the outer wall material.
A gasket for joints of outer wall materials. A gasket for the joint portion of the outer wall material used for the joint portion of the outer wall material,
Having a predetermined length extending along the joint portion of the outer wall material;
The cross-sectional shape is formed so as to have a substantially V-shaped bent portion,
The bent portion is configured such that an end portion away from the bent portion is deformed close to the insertion portion when inserted into the joint portion.
A gasket for joints of outer wall materials. The joint part of the outer wall material is provided with at least one of the gasket for joint part of the outer wall material according to claim 1 and the gasket for joint part of the outer wall material according to claim 2.
The waterproof structure of the outer wall material characterized by this. The outer wall material is an extruded cement board,
The waterproof structure of the outer wall material according to claim 3. The outer wall material is an extruded cement board,
The joint part of the extruded cement board further comprises a draining plate for guiding water dripping from the hollow part of the extruded cement board on the upper part to the lower part of the extruded cement board on the joint part,
Placing the draining plate on a base material supporting the extruded cement board from below;
The joint gasket having the base portion and the top portion between the draining plate and the extruded cement plate,
Adhering the base of the joint gasket to the draining plate or the extruded cement board,
The top of the joint gasket was configured to press against the extruded cement plate or the draining plate,
The waterproof structure of the outer wall material according to claim 3. Between the base material that supports the extruded cement board from below and the extruded cement board, the gasket for joints having a bent portion is further provided.
The waterproof structure of the outer wall material according to claim 5. An airtight gasket is further provided between the hollow portion of the extruded cement plate and a fixing member for fixing the extruded cement plate to the casing.
The waterproof structure of the outer wall material according to any one of claims 4 to 6.

Images