JP2016183521A - Gasket, construction method of joint structure, repair method for joint structure, and gasket insertion tool - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gasket that facilitates switching of a primary water cutoff part to a wet-type sealing, even when a difference between a width of the primary water cutoff part located between edge surfaces of exterior wall surface materials of an exterior wall panel and a width of the edge surface is large.SOLUTION: A gasket 7 includes: a core part 70 located on a central side of a joint formed between adjacent exterior wall panels; a primary water cutoff part 701 protruded from the core part 70 at a location between edge surfaces of exterior wall surface materials of the exterior wall panel; a secondary water cutoff part 702 protruded from the core part 70 and located on a rear surface side of the exterior wall surface material; and a notch part 703 that enables the primary water cutoff part 701 to be ripped off by a hand from the core part 70.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a gasket provided on a joint of a building, a joint structure construction method, a joint structure repair method, and a gasket insertion tool.

  Patent Document 1 discloses a gasket provided at a joint of a building. This gasket has a first fin located between the small edge surfaces (vertical joints) of the adjacent outer wall surface materials, and a second fin located between the small edge surfaces of the vertical trunk edges provided on the back surface of the outer wall material. , And a third fin located between the facets of the heat insulating board provided on the back surface of the vertical body edge.

JP 2013-174123 A

  However, if the difference between the width of the vertical joint and the width of the first fin is large, there is a problem that the first fin does not fit into the vertical joint, or a gap between the vertical joint and the first fin. The problem that occurs occurs. In this case, when a new gasket having a different size is arranged, another problem such as a delay in the construction period arises.

  In view of the above circumstances, when the difference between the primary water stop portion located between the small edge surfaces of the outer wall surface material of the outer wall panel and the width of the small edge surface is large, the present invention wets the primary water stop side. It is an object of the present invention to provide a gasket that makes it easy to cope with the above-mentioned sealing, a method for constructing a joint structure using the gasket, a repair method for the joint structure, and a gasket insertion tool.

  In order to solve the above problems, the gasket of the present invention is a gasket mounted on a joint formed between adjacent outer wall panels, and a core portion located on the center side in the joint, and the core portion. A primary water stop portion protruding and positioned between the small edge surfaces of the outer wall surface material of the outer wall panel; a secondary water stop portion protruding from the core portion and positioned on the back surface side of the outer wall surface material; A tear-off region that makes it possible to tear the primary water-stopping part from the core part.

  If it is said structure, since the said primary water stop part can be torn off from the said core part, the said primary water stop part located between the small edge surfaces of the outer wall surface material of an outer wall panel, and the said small edge surface When the difference with the width is large, it is easy to tear off the primary water stop portion from the core portion and switch the primary water stop side to wet sealing.

  The secondary water stop portion protrudes in the joint width direction from the core portion in the space serving as the joint between the trunk edges provided on the back surface of the outer wall surface material, and catches water that has entered the space. A wind barrier portion projecting in the joint width direction from the core portion at a location between the rain barrier portion to be flown and the small edge surface of the plate material provided on the back surface of the trunk edge, and sealing between the location and the space; May be provided.

  Further, the joint structure construction method of the present invention is a joint structure construction method using the gasket, wherein the primary water stop portion is torn from the core portion, and the secondary water stop portion is embedded in the joint. A sealing backer is provided on the end face of the core part where the primary water stop part is torn off, and an amorphous sealing material is applied on the sealing backer. If it is this construction method, since the said primary water stop part is torn off from the said core part, and the said sealing backer is provided in the end surface of the said core part of the location where this primary water stop part was torn off, the said indefinite form This makes it easy to switch to wet sealing by applying a sealing material.

  Further, the joint structure repair method according to the present invention is a joint structure repair method using the gasket, wherein the primary water stop portion is torn off from the gasket embedded in the joint, and the primary stop is provided. A sealing backer is provided on the end face of the core part where the water part is torn off, and an amorphous sealing material is applied on the sealing backer. With such a repair method, the primary water stop portion can be torn from the gasket that was originally embedded in the joint and can be switched to wet sealing by applying the amorphous sealing material. Since the secondary water stop portion of the gasket originally embedded in the joint is reused, the joint structure can be repaired at low cost.

The joint structure repair method of the present invention is a joint structure repair method using the gasket, wherein the gasket embedded in the joint is taken out, and the primary water stop portion is torn off from the gasket. The gasket is backfilled in the joint, a sealing backer is provided on an end surface of the core part where the primary water stop part is torn off, and an amorphous sealing material is applied on the sealing backer. To do.
With such a repair method, the gasket embedded in the joint is once taken out, and the primary water stop portion is torn off from the gasket. Therefore, the tearing operation can be easily performed.

  The gasket insertion tool according to the present invention is a gasket insertion tool for mounting the gasket from which the primary water stop portion has been torn to a joint formed between adjacent outer wall panels, It comprises two plate members that push the root part of the secondary water stop part projecting from the above.

  With such a configuration, since the root portion of the secondary water stop portion is pushed by the two plate members, the pushing force can be reliably applied to the gasket, and the primary water stop portion is torn off. Therefore, the gasket can be prevented from being tilted in the joint. Accordingly, the gasket can be quickly and accurately attached to the joint where the primary water stop portion has been torn off.

  You may provide the elastic member which maintains the state which made the front end side of the said 2 plate member wider than the core part of the gasket from which the said primary water stop part was torn off. According to this, since the front end side of the two plate members is wider than the core portion, the operation of expanding the front end of the plate member when sandwiching the core portion of the gasket from which the primary water stop portion has been torn off. It becomes easy to carry out the mounting operation of the gasket, such as eliminating the need for.

  You may provide the contact part which contacts the outdoor surface of the said outer wall surface material, and determines the distance from the said outdoor surface to the front-end | tip part of the said 2 plate member. According to this, it is possible to easily mount the gasket from which the primary water stop portion has been torn off at an appropriate position (depth) in the joint.

  The said contact part may be provided in the isolation | separation state so that it can visually recognize between the small edge surfaces of the said outer wall surface material. According to this, the gasket can be mounted from between the small edge surfaces while confirming its posture.

  According to the present invention, even when the difference between the primary water stop portion located between the small face surfaces of the outer wall surface material of the outer wall panel and the width of the small face surface is large, the primary water stop side is switched to the wet sealing. The effect is that it is easy to install.

It is the general | schematic horizontal sectional view which showed the joint water stop structure where the gasket of embodiment of this invention was used supposing the condition where the joint width is narrow. It is the general | schematic horizontal sectional view which showed the joint water stop structure where the gasket of embodiment of this invention was used supposing the condition where the joint width is wide. FIG. 3 is an enlarged schematic cross-sectional view of the gasket shown in FIGS. 1 and 2. It is explanatory drawing explaining a mode that the gasket of FIG. 3 from which the primary water stop part was torn is mounted | worn with a gasket insertion tool to a joint. FIG. 4 is a schematic cross-sectional view showing a joint structure using the gasket of FIG. 3 in which a primary water stop portion has been torn off. It is the schematic perspective view which showed the gasket insertion tool of embodiment of this invention.

  As shown in FIGS. 1 and 2, 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. It has. The vertical trunk edge 3 is located on the back side (indoor side) of the outer wall surface material 2, and the plate member 4 is located on the back side (indoor side) of the vertical trunk edge 3.

  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 is formed between the outer wall panels 1 adjacent to the left and right. And in this vertical joint, the width of the space which becomes the joint between the vertical trunk edges 3 is the width of the space which becomes the joint between the small edge surfaces of the outer wall surface material 2 and the small edge surface of the plate material 4. It is wider than the width of the joint space.

  The vertical joint is provided with a gasket 7 that seals the vertical joint. The gasket 7 is made of a synthetic rubber such as EPDM (ethylene / propylene rubber). Of course, it is not limited to such materials. Further, a thermoplastic elastomer such as TPO (olefin-based elastomer) or a resin such as PVC (polyvinyl chloride) may be used. A rubber-like elastic body is preferable as the material of the gasket 7, and in particular, a material with low flexibility such as polypropylene (PP) or polyethylene (PE) can be used for the core of the gasket.

  The gasket 7 can be inserted from a space serving as a joint between the facets of the outer wall surface material 2. A jig (not shown) can be used for mounting the gasket 7. When the gasket 7 is pushed in from the outdoor side by the jig, the gasket 7 is pushed into a specified position.

  The gasket 7 has a core portion 70 located on the center side of the joint. The core portion 70 has a shape in which a cross-sectional shape orthogonal to the longitudinal direction is elongated in the depth direction of the joint, and in order from the indoor side (back side) to the outdoor side (front side), The first fin 71, the second fin 72, the third fin 73, the fourth fin 74, the fifth fin 75, and the sixth fin 76 are provided. These fins are formed so as to protrude from the core portion 70 to both sides in the joint width direction.

  For example, a primary water stop 701 (see FIG. 3) is configured by the fourth fin 74, the fifth fin 75, and the sixth fin 76, and the first fin 71, the second fin 72, and the A secondary water stop 702 is configured by the three fins 73. The primary water stop 701 protrudes from the core part 70 and is located between the small edge surfaces of the outer wall surface material 2 of the outer wall panel 1, and the secondary water stop part 702 is the core part 70. Projecting from the outer wall surface material 2 and located on the back surface side. In addition, a notch portion 703 serving as a tearing region that allows the primary water blocking portion 701 to be torn off from the core portion 70 by hand on the core portion 70 at the back side portion of the fourth fin 74. Is formed. The notch 703 is formed in a U-groove shape or a V-groove shape, and the core portion 70 is partially thinned. The notch portion 703 is formed in the vicinity of the fourth fin 74 so that the core portion 70 is left at a position closer to the outdoor side than the third fin 73. In addition, since the thickness of the vicinity of the base part of the fin is thinner than the base part, even if the notch part 703 is not particularly formed, it can be a tearing region. In addition, when the end of the gasket 7 is cut with a scissors in the vicinity of the root portion, the cut can be used as a trigger, and tearing can be easily performed.

  The first fin 71 seals between the small edge surfaces at a position between the small edge surfaces of the plate material 4 and guides the core 70 to the center between the small edge surfaces of the plate material 4. Function. A concave groove is formed in the longitudinal direction of the gasket 7 on the surface of the first fin 71 on the outdoor side, and the front end side of the first fin 71 is easily bent in the outdoor direction by the concave groove.

  The second fin 72 includes a first pressing portion 72a that presses the small edge surface of the plate material 4 in the joint width direction, and a second pressing portion 72b that presses the outdoor side surface of the plate material 4 in the indoor direction. It functions as a wind barrier portion that seals between a portion between the small edge surfaces of the plate member 4 and a space serving as a joint between the vertical body edges 3. That is, the joint space on the vertical trunk edge 3 side is blocked by the second fin 72 from the indoor space on the plate member 4, so that the joint space on the vertical trunk edge 3 side is airflow at an atmospheric pressure equal to the external air pressure. It becomes a space where it is difficult to generate.

  As shown in FIG. 3, the first pressing portion 72a is formed so as to be inclined obliquely in the outdoor direction in a natural state, and the second pressing portion 72b is a tip portion of the first pressing portion 72a. It is formed so as to be inclined in the indoor direction. Sponges 72c are bonded to the indoor-side surfaces of the first pressing portion 72a and the second pressing portion 72b, respectively. The indoor side surface of the boundary between the first pressing portion 72a and the second pressing portion 72b is a location located at the corner on the outdoor side of the plate member 4, and a concave groove is formed in the longitudinal direction of the gasket 7 at the location. The second pressing portion 72b is easily bent in the indoor direction. Further, no sponge is provided at the location where the concave groove is formed.

  The third fin 73 is formed independently of the second fin 72. That is, the third fin 73 protrudes directly from the core portion 70 rather than protruding from the middle portion of the second fin 72. The third fin 73 protrudes in the joint width direction within the space serving as the joint between the vertical trunk edges 3, and receives water that has entered the joint space between the vertical trunk edges 3. It functions as a rain barrier that drops downward. Further, the base side of the third fin 73 is formed so as to be inclined obliquely in the outdoor direction in the natural state. Further, a concave groove is formed in the longitudinal direction of the gasket 7 on the surface of the third fin 73 on the outdoor side, and a portion on the tip side of the concave groove is on the back surface of the outer wall surface material 2. It is bent in the approaching direction. Although the tip of the third fin 73 is not in contact with the back surface of the outer wall surface material 2, the structure in which the tip of the third fin 73 is in contact with the back surface of the outer wall material 2 may be adopted. Good.

  The fourth fin 74 is formed so as to be located in a space serving as a joint between the small edge surfaces of the outer wall surface material 2 and presses the small edge surface of the outer wall surface material 2 in the joint width direction. The overall width of the fourth fin 74 including the core portion 70 is made narrower than the overall width of the third fin 73, and wider than the width between the small edge surfaces of the outer wall surface material 2. . The fourth fin 74 is located away from the third fin 73 so that the third fin 73 does not overlap when the third fin 73 is bent on the outdoor side when the joint is inserted.

  The fifth fin 75 is formed so as to be located in a space serving as a joint between the small edge surfaces of the outer wall surface material 2 and presses the small edge surface of the outer wall surface material 2 in the joint width direction. The overall width of the fifth fin 75 including the core portion 70 is wider than the overall width of the fourth fin 74. A sponge 75 a is bonded to the indoor side surface of the fifth fin 75.

  The sixth fin 76 is located on the most outdoor side of the small edge surface of the outer wall surface material 2, presses the small edge surface in the joint width direction, and exposes it to the outside to form the appearance of the outer wall. Note that the sixth fin 76 may be formed using a material different from the other parts with emphasis on design. The overall width of the sixth fin 76 including the core portion 70 is approximately the same as the overall width of the fifth fin 75. Further, the sixth fin 76 and the fifth fin 75 are not only connected to the core portion 70 but also connected to each other by a connecting portion 77. A cavity is formed between the connecting portion 77 and the core portion 70 so that the fifth fin 75 can be deformed without difficulty when the joint is mounted.

  A cored bar 78A is provided in the core part 70 between the fifth fin 75 and the sixth fin 76. Further, a core wire 78 </ b> B is provided in the core portion 70 in the vicinity of the base portion of the second fin 72.

  In the secondary water stop part 702, if the third fin 73 serving as the rain barrier part and the second fin 72 serving as the wind barrier part exist independently, the second water stop part 702 serves as the second wind barrier part. While the fins 72 are provided between the small edge surfaces of the plate member 4, the third fins 73 serving as the rain barrier portion can be provided close to the back surface side of the outer wall surface material. For this reason, it becomes unnecessary to form the said 3rd fin 73 long, and the generation | occurrence | production state of the resistance by the contact with the said 3rd fin 73 at the time of pushing the said gasket 7 into a joint and the small edge surface of the said outer wall surface material 2 can be shortened. Therefore, the work efficiency of gasket mounting is improved. Further, since the third fin 73 and the second fin 72 do not influence each other due to the independent structure, the second fin 72 can be appropriately pressed against the plate member 4.

  If it is the structural example which has the said 1st press part 72a, between the small edge surfaces of the said board | plate material 4 can be pressed, airtightness can be ensured, and if it is the structural example which has the said 2nd press part 72b, the said board | plate material The outdoor side surface of 4 can be pressed to ensure airtightness. When both the first pressing portion 72a and the second pressing portion 72b are provided, even when the airtightness by one pressing portion is insufficient, the airtightness by the other pressing portion can be ensured. For example, as shown in FIG. 1, when the joint width is narrow, there is a possibility that the air tightness by the second pressing portion 72b may be insufficient, but even in such a case, the air tightness by the first pressing portion 72a is not sufficient. It is possible to secure. On the other hand, as shown in FIG. 2, when the joint width is wide, there is a possibility that the air tightness by the first pressing portion 72a may be insufficient. However, even in such a case, the air tightness by the second pressing portion 72b is reduced. It is possible to secure. Further, even if there is a step on the surface of the adjacent plate member 4 on the outdoor side, airtightness by the first pressing portion 72a is ensured on one plate member 4 side, and the second press member is on the other plate member 4 side. Airtightness by the part 72b can be ensured.

  As described above, in the construction of the joint structure using the gasket 7, a common gasket is used even when the space (joint) between the small wall surfaces of the outer wall surface material 2 is somewhat narrow or wide. 7 is available. Further, even when the difference between the primary water stop 701 located between the small wall surfaces of the outer wall surface material 2 and the width of the small wall surface is quite large, as shown in FIG. The water portion 701 can be torn off from the core portion 70, and the gasket 7 (secondary water stop portion 702) can be embedded in the joint. And as shown in FIG. 5, the sealing backer 91 can be provided in the end surface of the said core part 70 of the location where the said primary water stop part 701 was torn off. The sealing backer 91 is, for example, one in which an adhesive surface is formed on one surface of a foamed resin having a square cross section, and can be selected according to the width of the joint. Then, the sealing backer 91 is inserted into the joint with the adhesive surface facing the indoor side, and the adhesive surface is bonded to the end surface of the core portion 70. Thereafter, an irregular sealing material 92 can be applied on the sealing backer 91.

  In the case of the gasket 7, when the difference between the primary water stop portion 701 located between the small wall surfaces of the outer wall surface material 2 and the width of the small wall surface is large, the primary water stop portion 701 is the above-mentioned. Since it can be torn off from the core portion 70 by hand, it becomes easy to switch the primary water stop side to wet sealing. And if it is the said construction method, since the said sealing backer is provided in the end surface of the said core part 70 of the location where the said primary water stop part 701 was torn off, application | coating of the said amorphous sealing material becomes easy. The core portion 70 in the vicinity of the base portion of the second fin 72 is provided with a core wire 78B. Therefore, even if the primary water stop portion 701 is torn off, the secondary water stop portion 702 does not Desired elongation or the like is suppressed.

  Moreover, in this embodiment, as shown in FIG. 4, the gasket insertion tool 8 is used to insert the gasket 7 from which the primary water blocking portion 701 has been torn off into the joint. The gasket insertion tool 8 includes two plate members 81 that push the root portion of the third fin 73 located on the most outdoor side among the fins constituting the secondary water stop portion 702. As shown in FIG. 6, the tip side of the plate member 81 corresponding to the root portion is formed in a substantially arc shape, so that the root portion is not excessively deformed. Further, the gasket insertion tool 8 is formed with a rectangular tube-shaped handle portion 81a so as to be easily held.

  Since the gasket 7 can be pushed into the joint by pushing the root portion of the secondary water stop 702 by the two plate members 81, the pushing force can be surely applied to the gasket 7 and the primary Since the core portion 70 where the water stop portion 701 is torn is sandwiched between the two plate members 81, the gasket 7 can be prevented from tilting in the joint. Therefore, the mounting operation of the gasket 7 with the primary water stop 701 torn off on the joint can be performed quickly and accurately.

  The gasket insertion tool 8 is an elastic member 82 that maintains a state in which the distal end sides of the two plate members 81 are wider than the width of the core portion 70 of the gasket 7 from which the primary water blocking portion 701 has been torn off. It has. The elastic member 82 is formed of, for example, a substantially U-shaped plate spring, and is fixed to the plate member 81 by a screw or the like (not shown). The gasket insertion tool 8 can be operated like a so-called tongue. If the elastic member 82 is provided, the two plate members 81 are wider than the core part 70 so that the primary water-stopping part 701 is torn and sandwiches the core part 70 of the gasket. At this time, the operation of expanding the tip of the plate member 81 is not required, and the mounting operation of the gasket is facilitated. In addition, the operation of moving the gasket insertion tool 8 is facilitated while the core portion 70 is sandwiched between the two plate members 81. The elastic member 82 is provided with the folded portion in the U-shape directed toward the front end side of the plate member 81, but is not limited thereto, and the structure in which the folded side is provided toward the handle portion 81a side. It is good.

  The gasket insertion tool 8 includes a contact portion 83 that contacts the outdoor surface of the outer wall surface material 2 and determines the distance from the outdoor surface to the tip portions of the two plate members 81. The contact portion 83 includes a support member 83 a having a substantially L-shaped cross section in which a first surface faces the plate member 81 and a second surface faces the outdoor surface of the outer wall surface material 2. The support member 83a is fixed to the plate member 81 by a screw 83c attached to the first surface. Further, a contact member 83b made of resin or rubber material that does not damage the outdoor surface of the outer wall surface material 2 is bonded to the second surface. When the contact portion 83 is provided, it is easy to mount the gasket 7 (secondary water stop portion 702) from which the primary water stop portion 701 has been torn off at an appropriate position (depth) in the joint. become.

  The contact member 83b is formed long in the vertical joint direction so that the distance from the outdoor surface to the tip side of the plate member 81 does not change as much as possible due to the influence of the design irregularities on the outdoor surface of the outer wall material 2. Is desirable. On the other hand, the presence of the contact member 83b hinders visual recognition between the small facets (joints) of the outer wall surface material 2. In this embodiment, for example, the contact member 83b and the center side portion of the second surface are removed to form a separate shape, and the center of the contact portion 83 is increased while increasing the substantial length of the contact member 83b. The space between the small edge surfaces of the outer wall surface material 2 (joint) is visible from the side. When such visual recognition is possible, the gasket 7 can be mounted while confirming the posture of the gasket 7 from which the primary water blocking portion 701 has been torn apart from between the small facets, The mounting | wearing malfunction of the gasket 7 (secondary water stop part 702) can be prevented reliably.

  Further, an adjustment hole 83d is formed in the first surface of the support member 83a so that the distance from the outdoor surface of the outer wall surface material 2 to the tip portions of the two plate members 81 can be adjusted in three stages. It has become. Thereby, for example, even when the thickness of the outer wall surface material 2 differs according to the specifications of the outer wall panel 1, it is possible to cope with the common gasket insertion tool 8. The adjustment is not limited to three stages, and may be two stages. The hole shape for the three-stage adjustment may be, for example, an E shape.

  As shown in FIG. 1 and FIG. 2, after the joint structure is constructed by the gasket 7 of the original shape in which the primary water stop portion 701 is not torn, the primary water stop portion 701 changes over time. It may be desirable to replace it due to deterioration or contamination. In addition, there may be a problem in water stoppage by the primary water stop portion 701 due to an earthquake or the like. Therefore, a method for repairing the joint structure will be described below.

  For example, the primary water stop 701 is torn off from the gasket 7 embedded in the joint. Then, as shown in FIG. 5, a sealing backer 91 is provided on the end surface of the core part 70 where the primary water blocking part 701 has been torn off, and an irregular sealing material 92 is provided on the sealing backer 91. Apply. With such a repair method, the primary water stop portion 701 is torn off from the gasket 7 originally embedded in the joint, so that it is easy to switch to wet sealing by applying the irregular sealing material 92. Yes. Further, since the secondary water stop portion 702 of the gasket originally embedded in the joint is reused, the joint structure can be repaired at a low cost.

  In the repair method described above, the primary water stop portion 701 was torn off from the gasket 7 while the gasket 7 was embedded in the joint. The embedded gasket 7 may be taken out, the primary water stop 701 may be torn from the gasket 7 and the secondary water stop 702 may be backfilled in the joint. With such a repair method, the gasket 7 embedded in the joint is once taken out, and the primary water stop 701 is torn off from the gasket 7, so that the tearing operation can be easily performed. In addition, when returning the secondary water stop part 702 to a joint, the said gasket insertion tool 8 can be used.

  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 7 Gasket 70 Core part 71 First fin 72 Second fin (wind barrier part)
73 3rd fin (Rain barrier part)
74 4th fin 75 5th fin 76 6th fin 701 Primary water stop part 702 Secondary water stop part 703 Notch part (tearing area)
8 Gasket Insertion Tool 81 Plate Member 82 Elastic Member 83 Contact 91 Sealing Backer 92 Sealing Material

Claims (9)

  In the gasket attached to the joint formed between the adjacent outer wall panels, between the core located on the center side in the joint and the small face of the outer wall surface material of the outer wall panel protruding from the core A primary water stop portion located at the center portion, a secondary water stop portion projecting from the core portion and positioned on the back surface side of the outer wall surface material, and tearing the primary water stop portion from the core portion. A gasket characterized by comprising a tear-off area that allows.   The gasket according to claim 1, wherein the secondary water stop portion protrudes in the joint width direction from the core portion in a space serving as the joint between the trunk edges provided on the back surface of the outer wall surface material, Projecting in the joint width direction from the core portion at a location between a rain barrier portion that receives and flows water that has entered the space and flows and a small edge surface of a plate provided on the back surface of the trunk edge, the location and the space And a wind barrier part for sealing between the two.   A joint structure construction method using the gasket according to claim 1 or 2, wherein the primary water stop portion is embedded in the joint, and the primary water stop portion is embedded in the joint. A method for constructing a joint structure, wherein a sealing backer is provided on an end face of the core portion at a location where the tear has been torn off, and an amorphous sealing material is applied on the sealing backer.   It is a repair method of the joint structure using the gasket of Claim 1 or Claim 2, Comprising: The said primary water stop part is torn off from the said gasket embedded in the said joint, The said primary water stop part is A repair method for a joint structure, characterized in that a sealing backer is provided on an end face of the core portion at a torn location, and an amorphous sealing material is applied on the sealing backer.   A method for repairing a joint structure using the gasket according to claim 1 or 2, wherein the gasket embedded in the joint is taken out, and the primary water stop portion is torn off from the gasket. Filling the joint, providing a sealing backer on the end face of the core where the primary waterstop is torn, and applying an irregular sealing material on the sealing backer Repair method.   A gasket insertion tool for mounting the gasket, in which the primary water blocking portion is torn in the gasket according to claim 1 or 2, to a joint formed between adjacent outer wall panels, A gasket insertion tool comprising two plate members that push the root part of the secondary water stop part protruding from the part.   The gasket insertion tool according to claim 6, further comprising an elastic member that maintains a state in which a distal end side of the two plate members is wider than a core portion of the gasket from which the primary water stop portion is torn off. A gasket inserter characterized by.   The gasket insertion tool according to claim 6 or 7, further comprising a contact portion that contacts an outdoor surface of the outer wall surface material and determines a distance from the outdoor surface to the tip portions of the two plate members. A gasket inserter characterized by.   9. The gasket insertion tool according to claim 8, wherein the abutting portion is provided in a separated state so as to make it possible to visually recognize between the small edge surfaces of the outer wall surface material. .

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