JP6585889B2 - Joint backer and joint water stop structure - Google Patents

Description

  The present invention relates to a joint backer provided in a joint of a building and a joint water-stopping structure using the joint backer.

  When an irregular sealing material is provided on a horizontal joint formed between upper and lower adjacent outer wall materials, a joint backer that supports the back side of the irregular sealing material may be provided on the lateral joint. . However, when the ventilation layer is secured by the ventilation trunk edge provided on the indoor side of the outer wall surface material, it is required that the ventilation layer is not blocked by the joint backing.

  Patent Document 1 discloses a backup material that can ensure vertical ventilation and water passage when inserted in a joint between upper and lower exterior materials. When this backup material is inserted into a joint formed between upper and lower exterior materials, the backup material abuts against the housing and has a ventilation / water-permeable member and a ventilation / water-permeable member. And a joint bottom constituent member which is provided on the upper surface of the member and constitutes the bottom surface of the joint part filled with the sealing material.

JP 2008-156842 A

  However, the backup material disclosed in Patent Document 1 has a problem in that the ventilation / water passage member has a mesh structure and is complicated, resulting in an increase in cost.

  In view of the above circumstances, the present invention provides a joint backer capable of realizing a structure capable of preventing the ventilation layer provided on the indoor side of the outer wall material from being blocked at low cost, and a joint water stop using the joint backer. It is an object to provide a structure.

  In order to solve the above-described problems, the joint backer of the present invention is a backer portion serving as a portion that supports the back side of the sealing material filled in the joint formed between the adjacent outer wall surfaces, and the backer. A lip portion formed so as to be foldable with respect to the backer portion on both sides of the portion, the lip portion is separable by tearing by hand, and the lip portion left without being separated is By being bent and put into the joint, an elastic restoring force is generated in the remaining lip portion, and the remaining lip portion spreads by the elastic restoring force and is caught on the corner of the back of the outer wall surface material. Features.

  If it is said structure, the said lip | rip part can be split by hand so that the ventilation cylinder edge provided in the indoor side of an outer wall surface material and a part of ventilation layer between this ventilation cylinder edge may be avoided. And by putting the joint backer in which a part of the lip part is separated in this way into the joint, it is possible to prevent the whole of the ventilation layer from being blocked by the lip part and to ensure ventilation. . On the other hand, the remaining lip portion spreads by the elastic restoring force in the ventilation layer and can be caught by the corner of the back of the outer wall surface material, so that the sealing material is firmly supported at the location of the ventilation layer. Can do. And since this joint backer has a structure in which the lip portion can be split by hand, the construction work can be performed quickly and can be produced at a lower cost than a conventional mesh-structured ventilation / water-permeable member. .

  In the places other than the remaining lip part, it does not matter whether the separation part of the lip part is the whole lip part or the middle part of the lip part. For example, the lip portion may be split and separated from a midway position in the width direction of the lip portion which is the depth direction of the joint.

  A notch portion may be formed in the middle of the lip portion in a direction perpendicular to the width direction of the lip portion, and the lip portion may be split and separated at the notch portion. When the notch portion is formed, the lip portion can be easily split by hand along the notch portion.

  Alternatively, the entire width direction of the lip portion, which is the depth direction of the joint, may be split and separated. In this configuration, the boundary portion between the backer portion and the lip portion may be thinner than the thickness of the lip portion, and the lip portion may be split and separated at the thinned boundary portion. .

  The lip portion is formed between a first surface portion located on the backer portion side, a second surface portion located on the distal end side, the first surface portion and the second surface portion, and the second surface portion is defined as the second surface portion. You may have the step part located in the outer side rather than one surface part. Such a configuration is suitable when the joint backer is used as a vertical joint.

  Further, the joint water-stopping structure of the present invention is a joint water-stopping structure in which any of the above joint fillers is placed in a horizontal joint formed between upper and lower adjacent outer wall materials, However, the lip portion was separated and placed in the horizontal joint so as to avoid the ventilator rim provided on the indoor side of the outer wall material and to avoid a part of the vent layer between the ventilator rims. Features.

  If it is said structure, it will prevent that the whole ventilation layer formed in the indoor side of the said outer wall surface material is block | closed with the said lip | rip part. In addition, since the remaining lip portion can be expanded by the elastic restoring force in the ventilation layer and caught on the corner of the back of the outer wall surface material, the sealing material should be firmly supported also at the location of the ventilation layer. Can do.

  The backer portion of the joint backer may be fixed to the outdoor side surface of the ventilator edge with an adhesive tape. According to this, the joint backer is firmly fixed at the place where the ventilator edge exists.

  If it is this invention, it is possible to produce the joint backer at low cost, and there exists an effect that ventilation of the indoor side of an outer wall surface material can be ensured easily using this joint backer.

It is general | schematic sectional drawing which showed the joint backer and joint joint water stop structure of embodiment of this invention. It is a figure which shows embodiment of this invention, Comprising: It is the general | schematic perspective view which showed a mode that the backer for joints in which the lip | rip part was partly separated was put in a horizontal joint. It is explanatory drawing which expanded the joint backer shown by FIG. 1, Comprising: The figure (A) shows the state made into the cross-sectional substantially U shape, and the figure (B) has shown the natural shape state. . It is explanatory drawing which showed the joint backer of other embodiment of this invention, Comprising: The same figure (A) shows the state made into the cross-sectional substantially U shape, and the same figure (B) shows the natural shape state. Yes. It is sectional drawing of the outline of the vertical joint structure which showed the example which used the joint backer of embodiment of this invention for the vertical joint.

  As shown in FIG. 1, the outer wall panel 1 is provided with, for example, an outer wall surface material 11, a ventilation trunk edge 12 provided on the indoor side of the outer wall surface material 11, and an indoor side of the ventilation trunk edge 12. The heat insulation board 13 and the outer wall frame part 14 which supports these are provided. A ventilation layer 15 is formed between the ventilation trunk edges 12 and between the outer wall surface material 11 and the heat insulating plate 13. The ventilator edge 12 is made of, for example, polystyrene (PS) resin.

  In each of the upper and lower outer wall panels 1 shown in FIG. 1, each outer wall frame portion 14 has, for example, a vertically arranged horizontal frame portion and a horizontally arranged vertical frame portion made of channel steel in a square frame shape. It becomes. Further, in the upper outer wall panel 1, the lower end portion of the outer wall surface material 11 is positioned below the lower end of the outer wall frame portion 14, and in the lower outer wall panel 1, the upper end of the outer wall surface material 11. The portion is located below the upper end of the outer wall frame portion 14. A horizontal joint 2 is formed between the lower end of the outer wall surface material 11 of the upper outer wall panel 1 and the upper end of the outer wall surface material 11 of the lower outer wall panel 1. In this horizontal joint 2, the joint backer 3 of this embodiment is provided. Then, an irregular sealing material 4 is filled on the joint backing 3, and the back side of the irregular sealing material 4 is supported by the joint backing 3.

  As shown in FIG. 2, the ventilation trunk edge 12 of the lower outer wall panel 1 is about 5 mm above the upper end of the outer wall surface material 11 of the lower outer wall panel 1 in the space on the back side of the horizontal joint 2. It is provided so as to protrude. The ventilator rim 12 is provided with a space of 455 mm on the side and forming a space therebetween. The space becomes the ventilation layer 15 communicating in the vertical direction. Here, if a thin flat backer is attached to the projecting portion of the ventilator rim 12, an irregular sealing material is provided at the location where the vent layer 15 is located between the ventilator rims 12. Can not support firmly.

  The joint backer 3 of this embodiment includes a backer portion 31 and a lip portion 32 as shown in FIG. The said backer part 31 becomes a site | part which supports the back surface side of the sealing material 4 with which the said horizontal joint 2 is filled. The lip portion 32 is formed to be foldable with respect to the backer portion 31 on both sides of the backer portion 31. Further, a concave groove 33 having a lateral opening is formed between the back side of both ends of the backer portion 31 and the lip portion 32. The width of the backer portion 31 is about 8 mm, and the thickness is about 3 mm. The thickness of the lip portion 32 is about 0.7 mm.

  The joint backer 3 has a substantially U-shaped cross section as shown in FIG. 3A in a state where the lip portion 32 is bent and placed in the transverse joint 2. Make it. On the other hand, the joint backer 3 is in a natural state before being provided in the horizontal joint 2 or in a state in which the lip portion 32 is spread on the back side of the horizontal joint 2 as shown in FIG. In addition, it has a low mountain shape.

  Each lip portion 32 is formed with an engaging portion 32a. Each lip portion 32 is formed between, for example, a first surface portion 321 located on the backer portion 31 side, a second surface portion 322 located on the distal end side, and the first surface portion 321 and the second surface portion 322. And a step S that positions the second surface portion 322 outside the first surface portion 321, and the step S serves as the engagement portion 32 a. When the backer 3 for joints is used for horizontal joints, the engaging portion 32a is not particularly used and may be omitted. However, the engaging portions 32a are useful when diverted for vertical joints. This will be described later.

  Further, the joint backer 3 can be separated by hand at a midway position in the width direction of the lip portion 32 which is the depth direction of the horizontal joint 2. In this embodiment, a notch portion that forms a portion that is thinner than the thickness of the lip portion 32 in a direction perpendicular to the width direction of the lip portion 32 (longitudinal direction of the joint backer 3) at the midpoint. 32b is formed. The intermediate part is formed at a position close to the backer part 31 so that the remaining part after separation does not protrude beyond the edge of the backer part 31. The cross-sectional shape of the notch portion 32b is not limited to a semicircular shape, and may be a quadrangle, a triangle, or the like.

  The joint backer 3 is made of, for example, TPO (olefin elastomer). Of course, it is not limited to such materials. The material is preferably a rubber-like elastic body, and is preferably a synthetic rubber such as EPDM (ethylene / propylene rubber) or a thermoplastic elastomer such as TPO. Further, a resin such as PVC (polyvinyl chloride) may be used.

  When the joint backer 3 is used for the horizontal joint 2, as shown in FIG. 2, a part of the lip portion 32 is split by hand along the notch portion 32b and separated. In addition, what is necessary is just to perform the cutting | disconnection of the width direction of the said lip | rip part 32 using a scissors. A part of the lip portion 32 is torn and separated at the location where the ventilator rim 12 is located, and the remaining lip portion 32 is located at the location of the vent layer 15 between the ventilator rims 12. . However, if the lip portion 32 is left in the entire width of the air-permeable layer 15, the air-permeable layer 15 is greatly narrowed. Therefore, the lip portion 32 is left so as to be shorter than the width of the air-permeable layer 15. To.

In the joint backer 3, the joint backer 3 can be put in the horizontal joint 2 by bending the lip portion 32 left unseparated with a finger to have a substantially U-shaped cross section. The remaining lip portion 32 is bent and inserted into the horizontal joint 2 to generate an elastic restoring force in the lip portion 32. As shown in FIG. The root portion of the lip portion 32 is caught on the corner of the back of the outer wall surface material 11. And the location which is the back surface of the said backer part 31, and faces the said ventilation trunk edge 12 is affixed on the outdoor side surface of the said ventilation trunk edge 12 with the double-sided adhesive tape 5. FIG. That is, the joint backer 3 is fixed to the ventilator edge 12 by the double-sided adhesive tape 5.

If it is said structure, the said lip | rip part 32 is split by hand so that the ventilation trunk edge 12 provided in the indoor side of the said outer wall surface material 11 and this ventilation layer edge 15 between a part may be avoided. can do. And by putting the joint backer 3 from which a part of the lip portion 32 is separated in this way into the horizontal joint 2, it is possible to prevent the entire air-permeable layer 15 from being blocked by the lip portion 32, Ventilation can be secured. On the other hand, the remaining lip portion 32 can be expanded by the elastic restoring force in the ventilation layer 15 and can be hooked on the corner of the back of the outer wall surface material 11, so that the sealing material 4 is placed at the location of the ventilation layer 15. Can support firmly. The joint backer 3 has a structure in which the lip portion 32 can be split by hand, so that the construction work can be performed quickly, and it can be manufactured at a lower cost than a conventional mesh-structured ventilation / water-permeable member. Can do.

If the notch portion 32b is formed at the midpoint of the lip portion 32, the lip portion 32 can be easily split by hand along the notch portion 32b. In addition, although it is good also as a structure where the notch | incision was made | formed by the cutter etc. in the said middle place, since the said notch part 32b can be formed simultaneously when shape | molding the said joint backer 3, it manufactures rather than the structure which makes the said notch There is also an advantage that is easy. Moreover, although it may form with the raw material which is easy to tear only in the said middle location, the direction of the structure which forms the said notch part tends to achieve cost reduction.

  In the joint backer 3, the separation portion of the lip portion is determined from the middle portion of the lip portion at a portion other than the remaining lip portion, but is not limited thereto. FIG. 4A and FIG. 4B show a joint backer 300 according to another embodiment. In the joint backer 300, the boundary portion 32c of the lip portion 32 is formed thinner than the thickness of the lip portion, so that the lip portion 32 can be easily bent. The boundary portion 32 c of the lip portion 32 is located below the concave groove 33 on the back side of the backer portion 31 and inside the both edges of the backer portion 31.

  In the joint backer 300, the entire width direction of the lip portion 32, which is the depth direction of the horizontal joint 2, can be split by hand along the boundary portion 32c. In addition, if the part of the boundary part 32c is formed in an angular concave shape, it is easy to tear along the corner of the concave part.

The boundary portion 32c may be cut with a cutter or the like. However, since the thinned boundary portion 32c can be formed simultaneously with the molding of the joint backer 3, the cut is made. There is also an advantage that it is easier to manufacture than the structure. Further, only the boundary portion 32c may be formed of a material that can be easily torn, but the structure in which the thinned boundary portion 32c is formed can easily reduce the cost.

  Next, diverting the joint backer 3 to a vertical joint will be described. As shown in FIG. 5, a vertical joint space is formed between the left and right outer wall panels 1. In the vertical joint space, the width of the space between the ventilator rims 12 is wider than the width of the space between the outer wall materials 11 and the width of the space between the heat insulating plates 13.

  Gaskets (hereinafter referred to as secondary gaskets) 7 that seal the space portions are provided in the space portions between the ventilator edges 12 and the space portions between the heat insulating plates 13.

  The joint backer 3 is provided in the vertical joint at a position above the head (outdoor side) of the secondary gasket 7. The joint backer 3 is received by the head in the secondary gasket 7.

  The length of the joint backer 3 in the longitudinal direction is, for example, about 2600 mm. In addition, since the length in the longitudinal direction of a general backer is about 1000 mm with respect to such a length, it will be constructed with about 3 joints, but the joint backer 3 is as described above. If it is formed long, the construction can be completed in one time.

  The joint backer 3 can be put into the longitudinal joint by bending both the lip portions 32 of the joint backer 3 with a finger to form a substantially U-shaped cross section without tearing and separating them. When the joint backer 3 is inserted into the vertical joint, the engaging portions 32a of both the lip portions 32 are hooked on the corners on the back of the outer wall surface material 11, respectively. And the elastic restoring force arises in both the lip | rip parts 32 of the said joint backer 3, The said hook is performed in a press-contact state, and it prevents that the said joint backer 3 remove | deviates from the said vertical joint.

  As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and variations can be made to the illustrated embodiment within the same range or equivalent range as the present invention.

DESCRIPTION OF SYMBOLS 1 Outer wall panel 11 Outer wall material 12 Venting trunk edge 13 Heat insulation board 14 Outer wall frame part 2 Horizontal joint 3 Backer part 31 Backer part 32 Lip part 33 Groove 32a Engagement part 32b Notch part 32c Boundary part 4 Sealing material 5 Double-sided adhesion Tape 7 Secondary gasket

Claims (7)

Backer part that is a part that supports the back side of the sealing material filled in the joint formed between the adjacent outer wall surface materials, and a lip that is formed to be foldable with respect to the backer part on both sides of the backer part And
The lip part can be separated from the backer part by tearing by hand, and the remaining lip part without being separated is bent and elastically restored to the remaining lip part in the state where it is put in the joint. Force is generated, the remaining lip part spreads and is caught on the corner of the back of the outer wall material,
The lip portion is formed between a first surface portion located on the backer portion side, a second surface portion located on the distal end side, the first surface portion and the second surface portion, and the second surface portion is defined as the second surface portion. A joint backer characterized by having a step portion positioned outside the one surface portion. 2. The joint backer according to claim 1 , wherein the lip portion is split and separated from a midway position in the width direction of the lip portion, which is the depth direction of the joint. 3. In joints for backer of claim 2, in the middle portion in the direction orthogonal to the width direction of the lip portion, the notch portion is formed, with the lip portion is torn by the notch portion separating A joint backer characterized by being able to. The joint backer according to claim 1 , wherein the entire width direction of the lip portion, which is the depth direction of the joint, is torn and separated. 5. The joint backer according to claim 4 , wherein a boundary portion between the backer portion and the lip portion is made thinner than a thickness of the lip portion, and the lip portion is torn at the thinned boundary portion. A joint backer characterized by being separable. Backer part that is a part that supports the back side of the sealing material filled in the joint formed between the adjacent outer wall surface materials, and a lip that is formed to be foldable with respect to the backer part on both sides of the backer part And the lip portion can be separated from the backer portion by being torn by hand, and the lip portion left without being separated is folded and the lip portion is put in the joint. An elastic restoring force is generated in the remaining lip portion, and a joint backer is formed between the outer wall materials adjacent to each other in the vertical direction. It is a joint water stop structure put in a side joint,
The joint backer is separated from the lip portion so as to avoid the ventilator rim provided on the indoor side of the outer wall surface material and to avoid a part of the vent layer between the ventilator rims, and put into the horizontal joint. Sealed water structure characterized by being made. The joint water stop structure according to claim 6 , wherein the backer portion of the joint backer is fixed to an outdoor side surface of the ventilation trunk edge by an adhesive tape.

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