JP6440987B2 - 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 joint formed between adjacent outer wall surfaces, a joint sealing backer that supports the back surface of the sealing material may be provided on the joint. Such a joint sealing backer has a quadrangular or circular cross section perpendicular to its longitudinal direction. In general, the backer used for raising the bulk has a square cross section. And, in the structure in which the secondary gasket is provided on the back side of the joint, as the backer for raising, for example, a material having a thickness of about 3 mm and a square cross section and having an adhesive surface on the back side of the joint, The adhesive surface is attached to the head of the secondary gasket. In addition, a plurality of types of raising backers having different widths are prepared, and the raising backers having a width corresponding to the width of the target joint are used.

  Patent Document 1 discloses a joint sealing backer that can cope with a small number of types or a single type of backer even when there is variation in the width of the joint.

  Patent Document 2 discloses a core material, a sealing material provided on the surface side of the core material so that elastically deformable side ends protrude from both sides of the core material, and both sides from the core material. There is disclosed a sealing backup material provided with a wing-like fixing member that protrudes toward the side and elastically deforms within the joint. In this sealing backup material, the sealing material and the fixing member are elastically deformed according to the width of the joint to cope with variations in the width of the joint, and the inner surface of the joint is pressed to stabilize the accommodation of the sealing backup material. be able to.

JP 2009-121022 A JP 2003-056084 A

  However, for example, if an uplifting backer having a thin thickness of about 3 mm and a square cross section is to be put in the joint between the outer wall panels, the raising backer is twisted and is applied at a specified position. It becomes difficult. There is also a problem that when the raising backer is inserted into the joint, the adhesion surface of the raising backer is likely to stick to the small edge surface of the outer wall surface material.

  Moreover, it is thought that the difficulty of the said construction can be reduced by using the joint sealing backer of the said patent document 1 instead of the said bulking backer. However, the joint sealing backer disclosed in Patent Document 1 is merely in pressure contact with the small edge surface of the outer wall surface material, and has a drawback of being easily detached from the joint.

  Moreover, it is thought that the difficulty of the said construction can be reduced by using the sealing backup material of the said patent document 2 instead of the said backer for raising. However, the sealing backup material has a three-dimensional shape and has a drawback of being bulky.

  In view of the above circumstances, the present invention uses a joint backer that can be securely fixed in the joint without using an adhesive tape, and has a shape that is not bulky in a natural state before use, and the joint backer. It is an object to provide a joint water stop structure.

  In order to solve the above problems, the joint backer of the present invention is a raised backer part that serves as a part that supports the back side of the sealing material filled in the joint formed between the adjacent outer wall surfaces. The lip portion is formed on both sides of the raised backer portion so as to be foldable with respect to the raised backer portion, and the lip portion is bent so as to have a substantially U-shaped cross section and put into the joint. Thus, an elastic restoring force is generated in the lip portion, and the engaging portion formed in the lip portion is caught on the corner of the back of the outer wall surface material.

  With the above configuration, the lip portion is bent so that the cross-section is substantially U-shaped, and the joint backer is inserted into the joint so that an elastic restoring force is generated in the lip portion, and the lip portion is formed. Since the engaged portion is hooked on the corner of the back of the outer wall surface material, the joint backer can be firmly fixed in the joint without using an adhesive tape. In addition, the joint backer has a relatively flat shape in a natural state before use in which the lip portion is not bent, and is not bulky as much as possible. And when bending the lip portion and putting the joint backer into the joint, the outer surface of the lip portion can be put in contact with the inner surface of the joint, so the lip portion functions as a guide, The joint backer can be easily put into the joint without causing twisting.

  The lip portion is formed between a first surface portion located on the raised 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 A step portion positioned outside the first surface portion, and the step portion may be the engagement portion. According to this, in the state where the lip part is sandwiched and bent with a finger, the tip side of the lip part is suppressed from being excessively narrowed. That is, since the second surface portion located on the tip side is located outside the first surface portion, the second surface portion can easily come into contact with the inner surface of the joint, and the joint backer can be inserted even in a narrow joint. It becomes easy. Further, if the tip end side of the lip portion is suppressed from being excessively narrow in this way, the tip end side of the lip portion hits this head portion even if the head portion of the secondary gasket is present at the center of the joint. It becomes difficult and the operation | work which puts the said lip | rip part in the clearance gap between the said head and the joint inner surface becomes easy. Moreover, if it is an engaging part by the said step part, even if it is a joint with a wide width | variety, it will be easy to be caught with respect to the corner | angular part of the back of the said outer wall surface material, and the said joint backing will become difficult to remove | deviate from the said joint.

  A concave groove may be formed between the back side of both ends of the raised backer part and the lip part. According to this, the lip portion can be bent without bending the end portion of the raised backer portion itself. Therefore, the lip portion can be bent without distorting the raised backer portion.

  The bent part of the lip part may be formed thinner than the thickness of the lip part main body. According to this, it becomes easy to bend the lip portion.

  Further, the joint water stop structure of the present invention is a joint water stop structure in which the joint backer is put in a joint formed between adjacent outer wall materials, and is provided in a space portion on the back side of the joint. The joint backer is received by a head that enters the joint in the gasket.

  With the above configuration, even when a force for sinking the joint backer is generated when filling the joint with the irregular sealing material, the joint backer is prevented from sinking by the gasket. .

  A fin portion projecting in the width direction of the joint is formed on the head portion of the gasket, and the fin portion may have a flexibility to bend by being pushed by the tip of the lip portion of the joint backer. According to this, even when the tip of the lip portion hits the fin portion when the joint backer is put into the joint, the fin portion is pushed by the tip of the lip portion and bends. Can be put in joints.

  In the joint backer of the present invention, the engaging portion formed on the lip portion is caught on the corner of the back of the outer wall surface material. The position can be fixed firmly. Moreover, in the natural state before use in which the lip portion is not bent, the joint backer has a relatively flat shape and is not bulky as much as possible. And since the joint backer can be put in while the outer side surface of the lip portion is in contact with the inner surface of the joint, the lip portion functions as a guide and does not cause twisting. Moreover, if it is the joint water stop structure of this invention, the sinking of the said backer for joints can be prevented with a gasket. Moreover, if the fin part of the said gasket is pushed and bent by the front-end | tip of the said lip | rip part, the said backer for joints can be put into a joint without trouble.

It is general | schematic sectional drawing which showed the joint backer and joint joint water stop structure of embodiment of this invention. It is explanatory drawing which showed the gasket used with the joint water stop structure of FIG. 1, Comprising: The same figure (A) shows the shape of the state put into the joint, The same figure (B) is the natural before putting in the joint. The shape is shown. It is explanatory drawing which showed the joint backer of embodiment of this invention, Comprising: The same figure (A) shows the shape of the state put into the joint, and the same figure (B) shows the natural shape before putting into the joint. Show. It is a figure which shows embodiment of this invention, Comprising: It is explanatory drawing which showed a mode that the backer for joints of FIG. 1 was put into a joint with a jig | tool. It is a figure which shows embodiment of this invention, Comprising: It is the perspective view which showed a mode that putting the joint backer of FIG. 1 in a joint. It is explanatory drawing which shows the joint backer of other embodiment of this invention, Comprising: The same figure (A) shows the shape of the state put into the joint, The same figure (B) is the natural shape before putting into a joint. Is shown. It is explanatory drawing which shows the joint backer of other embodiment of this invention, Comprising: An example of the engaging part formed in a lip | rip part is drawn and shown in part of one lip | rip part. It is explanatory drawing which shows the gasket used with the joint water stop structure of other embodiment of this invention.

  As shown in FIG. 1, the outer wall panel 1 includes an outer wall surface material 2, a vertical trunk edge 3, a plate material (glass wool plate or the like) 4, and a frame 5 serving as a support material to which the outer wall surface material 2 is attached. Yes.

  The vertical trunk edge 3 and the plate member 4 are fixed to the frame 5 by nails (not shown). Further, the plate material 4 is provided with a resin pin 6 for preventing sinking, and the plate material 4 is prevented from sinking when the nail is driven into the vertical trunk edge 3. An engagement hole (not shown) is formed on the back surface of the outer wall surface material 2. A back surface fixing screw (not shown) is screwed into the frame 5, and the outer wall surface material 2 is supported by the frame 5 by engaging the protruding head of the back surface fixing screw with the engagement hole. The

  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 vertical body edges 3 is wider than the width of the space between the outer wall materials 2 and the width of the space between the plates 4.

  Gaskets (hereinafter referred to as secondary gaskets) 7 for sealing the space portions are provided in the space portions between the vertical body edges 3 and the space portions between the plate members 4. The secondary gasket 7 is made of synthetic rubber such as EPDM (ethylene / propylene rubber). Of course, it is not limited to such materials. Also, a thermoplastic elastomer such as TPO (olefin-based elastomer) or a resin such as PVC (polyvinyl chloride) may be used. As the material of the secondary gasket 7, a rubber-like elastic body is preferable. In particular, a material with low flexibility such as polypropylene (PP) or polyethylene (PE) can be used for the core.

  The secondary gasket 7 can be inserted through a space between the outer wall materials 2 (hereinafter referred to as a vertical joint). In addition, as shown in FIG. 2A, the secondary gasket 7 has a first fin portion 71 protruding in the joint width direction at the indoor end (back side end) of the core portion 70 that is long in the joint depth direction. The first fin portion 71 is in pressure contact with the end surface of the plate member 4 to seal the space between the plate members 4. In addition, the shape of the natural state of the secondary gasket 7 before joint mounting becomes as shown in FIG.

  The secondary gasket 7 includes a second fin portion 72 protruding in the joint width direction at an intermediate portion of the core portion 70. The tip end portion of the second fin portion 72 is branched into a first projecting portion 72a and a second projecting portion 72b. The first projecting portion 72a is in pressure contact with the outdoor surface of the plate member 4, and the second projecting portion 72b is in pressure contact with the indoor surface of the outer wall surface material 2, so that the space between the vertical trunk edges 3 is provided. Sealed. Further, a sponge portion 74 is provided at a position on the base end side of the second fin portion 72 and facing the outdoor surface of the plate members 4 and 4. The sponge portion 74 seals between the indoor surface of the second fin portion 72 and the outdoor surface of the plate member 4.

  The head portion (outdoor side end) of the core portion 70 of the secondary gasket 7 enters, for example, about 5 mm into the vertical joint. The thickness of the outer wall surface material 2 is, for example, about 25 mm. A third fin portion 73 protruding in the joint width direction is formed on the head portion of the core portion 70. The overall width of the formation portion of the third fin portion 73 including the width of the core portion 70 is narrower than the width of the vertical joint, and the end portion of each third fin portion 73 and the outer wall surface material 2 A gap is formed between the facet (the inner surface of the vertical joint).

  A joint backer 8 is provided in the vertical joint at a position above the head of the secondary gasket 7. The joint backer 8 is received by the head of the secondary gasket 7.

  The joint backer 8 is made of TPO, for example. 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 or a thermoplastic elastomer such as TPO. Further, a resin such as PVC may be used.

  The joint backer 8 includes a raised backer 81 serving as a part for supporting the back side of the sealing material 9 filled in the vertical joint, and the folded backer 81 is bent on both sides of the raised backer 81. And a lip portion 82 formed in a possible manner. Further, a concave groove 83 having a lateral opening is formed between the back surfaces of both ends of the raised backer portion 81 and the lip portion 82. The height raised by the raised backer portion 81 is, for example, about 3 mm based on the head end of the secondary gasket 7.

  The length of the joint backer 8 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 three joints, but the joint backer 8 is as described above. If it is formed long, the construction can be completed in one time.

  The joint backer 8 has a substantially U-shaped cross section as shown in FIG. 3A when the lip portion 82 is bent and provided in the longitudinal joint. On the other hand, the joint backer 8 has a low mountain shape as shown in FIG. 3B in a natural state before being provided in the vertical joint.

  Each lip portion 82 is formed with an engaging portion 82a. In this example, each lip portion 82 includes a first surface portion 821 positioned on the raised backer portion side, a second surface portion 822 positioned on the distal end side, and the first surface portion 821 and the second surface portion 822. The step portion S is formed and the second surface portion 822 is positioned outside the first surface portion 821, and the step portion S serves as the engagement portion 82a. In other words, the engaging portion 82a is formed by forming a step shape in which the distance between the lip portions 82 when the cross-section is substantially U-shaped is widened from a midpoint. For example, the length from the bent part of each lip part 82 to the tip of the lip part is about 11 mm, and the engaging part 82a is formed at a position of about 4 mm from the tip of the lip part.

  As shown in FIGS. 4 and 5, the joint backer 8 can be put into the vertical joint by bending both lip portions 82 of the joint backer 8 with a finger to have a substantially U-shaped cross section. The joint backers 8 are put into the vertical joints, whereby the engaging portions 82a of both lip portions 82 are hooked on the corners on the back of the outer wall surface material 2, respectively. Then, both the lip portions 82 of the joint backer 8 are bent and an elastic restoring force is generated in the lip portion 82, so that the hooking is performed in a pressure contact state, and the joint backer 8 is detached from the vertical joint. Is prevented.

  When inserting the joint backer 8 into the vertical joint, as shown in FIG. 5, the joint backer 8 is inclined and is inserted into the vertical joint from the corner of the longitudinal end of the lip portion 82. Go. At this time, by using the jig 10 shown in FIG. 4, the joint backer 8 can be pushed to a prescribed depth. The jig 10 has a main body portion and a front end portion, and the front end portion is narrower than the width of the vertical joint (the width of the gap between the facets of the outer wall surface material 2). The joint backer 8 is pushed into the longitudinal joint to a specified depth in a state where it hits the longitudinal joint tapered portion of the outer wall surface material 2 or the like. In a state where the joint backer 8 is pushed into the vertical joint to a predetermined depth, the lip portions 82 are located between the small edge surface of the outer wall surface material 2 and the end portion of the third fin portion 73. The engaging portion 82 a passes through the gap and is hooked on the corner of the back of the outer wall surface material 2, and the leading end side of both the lip portions 82 is located in the space portion between the vertical trunk edges 3.

  If it is said structure, the said lip | rip part 82 will be bent by the said lip | rip part 82 with respect to the said raising backer part 81 so that the said joint backer 8 may become a substantially U-shaped cross section, and the said lip | rip part 82 is put. An elastic restoring force is generated in the lip portion 82, and the engaging portion 82a formed on the lip portion 82 is hooked on the corner of the back of the outer wall surface material 2, so that the joint backer is used in the longitudinal joint without using an adhesive tape. 8 position can be fixed firmly. Further, the joint backer 8 has a relatively flat shape in a natural state before use in which the lip portion 82 is not bent, and is not bulky as much as possible. When the lip portion 82 is bent and the joint backer 8 is put into the vertical joint, the outer surface of the lip portion 82 can be put in contact with the inner surface of the joint. The joint backer 8 functions as a guide and can easily be put into the longitudinal joint without causing twisting.

  The lip portion 82 is formed between the first surface portion 821 positioned on the raised backer portion side, the second surface portion 822 positioned on the tip side, and the first surface portion 821 and the second surface portion 822. And a step S for positioning the second surface portion 822 on the outer side of the first surface portion 821, and when the step S is the engaging portion 82a, the lip portion 82 is indicated. In the state of being sandwiched and bent, the tip side of the lip portion 82 is prevented from being excessively narrowed. That is, since the second surface portion 822 located on the front end side is located outside the first surface portion 821, the second surface portion 822 can easily come into contact with the inner surface of the joint, and the vertical joint having a narrow width can also be in contact with the joint. It becomes easy to put the backer 8 for use. In addition, when the tip end side of the lip portion 82 is suppressed from being excessively narrow in this way, even if the head portion of the secondary gasket 7 is present in the center portion of the joint, the lip portion 82 is in the head portion. The tip side is difficult to hit, and the operation of putting the lip portion 82 in the gap between the head and the inner surface of the vertical joint becomes easy. Further, if the engaging portion 82a is formed by the stepped portion S, it is easy to obtain a hook on the back corner of the outer wall surface material 2 even in a wide vertical joint, and the joint backer 8 is formed from the vertical joint. It becomes difficult to come off.

  In addition, when the concave groove 83 is formed between the back side of both ends of the raised backer portion 81 and the lip portion 82, the lip portion 82 is bent, and the end portion of the raised backer portion 81 is bent. Can be done without. Therefore, the lip portion 82 can be bent without distorting the raised backer portion 81.

  Moreover, the joint water stop structure of this embodiment is a structure in which the joint backer 8 is put in the longitudinal joint, and the secondary gasket 7 provided in the space portion on the back side of the longitudinal joint is the structure described above. The joint backer 8 is received by the head entering the vertical joint. With such a configuration, even if a force that sinks the joint backer 8 occurs when the irregular sealing material 9 is filled into the vertical joint, the sink of the joint backer 8 is 2 described above. This is prevented by the next gasket 7.

  6A and 6B show a joint backer 8 according to another embodiment. In the joint backer 8, the bent portion A of the lip portion 82 is formed thinner than the thickness of the lip portion main body, and the lip portion 82 can be easily bent. Further, in the bent portion A of the lip portion 82, when the back surface side of the raised backer portion 81 is shaved so that the back surface of the raised backer portion 81 is not obstructed when the lip portion 82 is bent, The lip portion 82 can be accurately bent. The bent portion A of the lip portion 82 is located below the concave groove 83 on the back side of the raised backer portion 81 and inside the both end portions of the raised backer portion 81.

  The engaging portion 82a in the joint backer 8 is formed by the step S, but is not limited thereto. For example, as shown in FIG. 7, the engaging portion 82 a may be formed by a concave groove that is concave on the outer surface side of the flat plate-like lip portion 82. The cross section of the concave groove may be a quadrangle, a triangle, a semicircle, or the like.

  FIG. 8 shows a secondary gasket 7 that can be used in the joint water stop structure of another embodiment. The third fin portion 73 formed on the head of the secondary gasket 7 has a flexibility to bend by being pushed by the tip of the lip portion 82 of the joint backer 8. This flexibility may be obtained by forming the entire third fin portion 73 to be thin, and the base portion of the third fin portion 73 is more than the thickness of the main body portion of the third fin portion 73. May also be obtained by being formed thin. As described above, if the third fin portion 73 has flexibility, even when the tip of the lip portion 82 hits the third fin portion 73 when the joint backer 8 is put into the vertical joint, Since the 3rd fin part 73 is pushed and bent by the front-end | tip of the said lip | rip part 82, the said joint backer 8 can be pushed in into the said vertical joint without trouble.

  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 2 Outer wall material 3 Vertical trunk edge 4 Plate material 5 Frame 7 Secondary gasket (gasket)
71 First fin portion 72 Second fin portion 73 Third fin portion 8 Joint backer 81 Raised backer portion 82 Lip portion 83 Groove 82a Engaging portion 9 Sealing material 10 Jig

Claims (6)

Raised backer part that serves as a part to support the back side of the sealing material filled in the joint formed between adjacent outer wall surface materials, and bendable to the raised backer part on both sides of this raised backer part The lip portion is bent so as to have a substantially U-shaped cross section and is put into the joint so that an elastic restoring force is generated in the lip portion, and the lip portion is formed. The engaging part is hooked to the corner of the back of the outer wall surface material,
The said lip | rip part has the 1st surface part located in the said raising backer part side rather than the said engaging part, and the 2nd surface part located in the front end side rather than the said engaging part, The jointing backer characterized by the above-mentioned . Te joint for backer smell of claim 1, said second surface has a stepped portion which is positioned on the outer side than the first surface between the first surface and the second surface portion, the stepped A joint backer characterized in that the portion is the engaging portion.   The joint backer according to claim 1 or 2, wherein concave grooves are formed between the back surfaces of both ends of the raised backer part and the lip part.   The joint backer according to any one of claims 1 to 3, wherein the bent portion of the lip portion is formed thinner than the thickness of the lip portion main body. Raised backer part that serves as a part to support the back side of the sealing material filled in the joint formed between adjacent outer wall surface materials, and bendable to the raised backer part on both sides of this raised backer part A joint backer in which the lip portion is bent and inserted into the joint so that the engaging portion formed on the lip portion is hooked on the corner of the back of the outer wall material. A joint water-stopping structure placed in a joint formed between adjacent outer wall materials, and the above-described head portion entering the joint in the gasket provided in the space portion on the back side of the joint. with joint for backer is received, the engagement portion in a state in which the lip portion to the fin portion formed on the head portion so as to protrude in the width direction of the joint is in contact of the outer wall member Joint waterstop structure characterized in that caught on the corner portion. A joint waterstop structure according to claim 5, said fin section joint waterstop structure characterized in that it has the flexibility to bend pushed to the tip of the lip portion of the backer for the joints.

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