JP6222144B2 - Waterproof structure of exterior wall joint - Google Patents

Description

  The present invention relates to a waterproof structure for an outer wall joint for preventing water from entering the indoor side from the joint between outer wall panels.

  Conventionally, in detached houses where rooms of different uses and sizes are arranged on each floor, the top and bottom vertical joints are horizontal joints in the joint structure of the outer wall formed by arranging multiple outer wall panels vertically and horizontally. In some cases, it is not formed in a straight line but is formed in a tear joint shape that causes a discrepancy between the upper and lower sides. Therefore, in such an outer wall joint, not only the cross joint part formed by the intersection of the vertical joint and the horizontal joint but also the T-shaped joint part formed by the upper end of the vertical joint hitting the horizontal joint or the lower end of the vertical joint. Has a reverse T-shaped joint formed by abutting against the horizontal joint.

  On the other hand, various waterproof structures for outer wall joints have been proposed to prevent rainwater or the like from entering the building from joints formed between a plurality of adjacent outer wall panels (for example, patents). Reference 1). In Patent Document 1, in the joint structure of the outer wall in which a plurality of outer wall panels are arranged side by side in the vertical and horizontal directions, water flows along the horizontal joint portion to the horizontal joint portion formed between the upper and lower adjacent outer wall panels. A vertical joint member is provided with a horizontal joint member provided with a hook-like portion, and a vertical joint member for forming a drainage channel is press-fitted into the vertical joint portion formed between the outer wall panels adjacent to the left and right to block the vertical joint portion. The vertical joint water-stopping part is brought into pressure contact with the end face of the horizontal joint member so that the vertical joint water-stopping part is brought into close contact with the end face of the horizontal joint member, so that the water from the connecting portion of the horizontal joint member and the vertical joint member is immersed. It is preventing.

Japanese Patent Laid-Open No. 11-062034

  However, in the waterproof structure of the outer wall joint as in Patent Document 1, in the case of an inverted T-shaped joint, the water that flows down through the drainage channel on the back surface of the vertical joint member cannot be received by the horizontal joint member. There is a risk of water spilling indoors.

  The present invention has been made in view of the above-described problems, and prevents water from entering the indoor side even in an outer wall joint having an inverted T-shaped joint portion and a T-shaped joint portion, and reliably It aims at providing the waterproof structure of the outer wall joint which can form the path | route which drains to the inside.

In order to achieve the above object, the waterproof structure of the outer wall joint according to the present invention is such that the upper end side of the vertical joint between the outer wall panels provided adjacent to the left and right is the outer wall panel provided adjacent to the left and right and the upper side thereof. The outer wall panel in which the lower end side of the vertical joint between the T-shaped joint portion formed by striking the horizontal joint between the outer wall panel provided and the outer wall panel provided adjacent to the left and right is provided adjacent to the left and right Is a waterproof structure of an outer wall joint having an inverted T-shaped joint formed by striking a horizontal joint between the outer wall panel provided below and the outer wall panel provided below the vertical wall between the outer wall panels provided adjacent to the left and right A vertical joint sealing material filled in the vertical joint to prevent water from entering the indoor side from the joint, and the vertical joint sealing material is pressed into the indoor side of the vertical joint rather than the vertical joint sealing material. A vertical joint sealing backup material having a vertical joint water-stopping portion that forms a vertical drainage space that closes the vertical joint so as to waterproof water entering from the material and flows downward, and an outer wall provided adjacent to the top and bottom In order to prevent water from entering from the side joint between the panels to the indoor side, the side joint sealing material filled in the side joint, and is pressed into the indoor side of the side joint more than the side joint sealing material, together close the horizontal joint to waterproofing water coming enters from the horizontal joint sealant, and a horizontal joint sealing backup material having a short grain Chitome water portion to form a horizontal drainage space to flow horizontally, the The vertical joint water-stopping portion is provided with a fin-like first water-stopping fin portion extending in the width direction at an end portion in the width direction, and the first water-stopping fin portion is connected to the left and right outer wall panels. Front in contact with the facet The vertical drainage space is sandwiched between vertical joints and is surrounded by a small facet located on the outdoor side of the first water stop fin portion of the outer wall panel and the first water stop fin portion. The horizontal joint water-stopping portion is provided with a fin-like second water-stopping fin portion extending in the width direction at an end in the width direction, and the second water-stopping fin portion is A small face and the second water stop which are sandwiched between the horizontal joints in contact with the small face of the upper and lower outer wall panels and located on the outdoor side of the second water stop fin portion of the outer wall panel. The horizontal drainage space is formed in a space surrounded by the fin portion, and the vertical joint sealing backup material is formed so that the vertical drainage space and the horizontal drainage space communicate with each other to form a drainage path. It is arranged in a vertical victory with respect to the sealing backup material, and the horizontal joint has the inverted T-shaped joint. In this case, water can be prevented from entering the indoor side from the joint between the vertical joint sealing backup material and the horizontal joint sealing backup material, and the water passing through the back of the horizontal joint sealing backup material at the T-shaped joint portion can be A horizontal joint waterproofing material for flowing so as to be in contact with the vertical joint sealing backup material is arranged in contact with the end portion on the indoor side of the horizontal joint sealing backup material.

  Moreover, the waterproof structure of the outer wall joint according to the present invention is a watertight material that is press-fitted into the indoor side with respect to the horizontal joint sealing backup material.

  Further, in the waterproof structure of the outer wall joint according to the present invention, the side joint waterproof material is located on the indoor side with respect to the side joint sealing backup material, and an inclined surface having a downward slope toward the outdoor direction is formed. It has an inclined part.

  Moreover, the waterproof structure of the outer wall joint according to the present invention is characterized in that the vertical joint sealing backup material and the horizontal joint sealing backup material have fire resistance.

  Moreover, the waterproof structure of the outer wall joint according to the present invention is characterized in that the vertical joint sealing backup material and the horizontal joint sealing backup material are members of the same type.

  According to the waterproof structure of the outer wall joint according to the present invention, the vertical joint closes the vertical joint on the indoor side with respect to the vertical joint sealing material filled in the vertical joint and forms a vertical drainage space that flows downward. A vertical joint sealing back-up material with joint water stop is press-fitted, and the horizontal joint has a horizontal drainage space that fills the interior side of the horizontal joint sealing material filled in the horizontal joint and flows horizontally. A horizontal joint sealing backup material having a horizontal joint water-stopping portion to be formed is press-fitted. The vertical joint sealing backup material is arranged in a vertical win with respect to the horizontal joint sealing backup material so that the vertical drainage space and the horizontal drainage space communicate with each other to form a drainage path. Therefore, even if there is a problem with the vertical joint sealing material or the horizontal joint sealing material, and rainwater has passed through the vertical joint sealing material or the horizontal joint sealing material, it prevents the intrusion of water into the indoor side, and the vertical drainage space. And all the area | regions of a horizontal drainage space can be reliably drained to the exterior using a drainage channel.

  In addition, the horizontal joint waterproof material is arranged on the indoor side of the horizontal joint sealing backup material, and the water that has flowed down from the vertical joint sealing backup material in the inverted T-shaped joint is the vertical joint. Prevent intrusion into the indoor side from the joint between the sealing backup material and the horizontal joint sealing backup material, and in the T-shaped joint, the water that passes the back of the horizontal joint sealing backup material is allowed to flow in contact with the vertical joint sealing backup material. Can do. Thereby, even in the outer wall joint having the inverted T-shaped joint portion and the T-shaped joint portion, it is possible to prevent water from entering the indoor side without using a dedicated member or the like, and to form a path for reliably draining to the outside. be able to.

  Moreover, according to the waterproof structure of the outer wall joint according to the present invention, since the horizontal joint sealing backup material is disposed in contact with the horizontal joint waterproof material, it has flowed down from the vertical joint sealing backup material. Water is more reliably prevented from entering the indoor side from the joint between the vertical joint sealing backup material and the horizontal joint sealing backup material, and the water passing through the back of the horizontal joint sealing backup material is more reliably vertical at the T-shaped joint. It can be made to flow in contact with the joint sealing backup material.

  Further, according to the waterproof structure of the outer wall joint according to the present invention, the horizontal joint waterproofing material is a watertight material that is pressed into the indoor side rather than the horizontal joint sealing backup material, and therefore flows down from the vertical joint sealing backup material. Water is more reliably prevented from entering the indoor side from the joint between the vertical joint sealing backup material and the horizontal joint sealing backup material, and water passing through the back of the horizontal joint sealing backup material is more reliably secured at the T-shaped joint. It can be made to flow in contact with the vertical joint sealing backup material.

  Further, according to the waterproof structure of the outer wall joint according to the present invention, the horizontal joint waterproofing material is located on the indoor side with respect to the horizontal joint sealing backup material, and the inclined surface having a downward slope toward the outdoor direction is formed. Therefore, the water passing through the back of the horizontal joint sealing backup material can be efficiently drained through the back of the vertical joint sealing backup material.

  In addition, according to the waterproof structure of the outer wall joint according to the present invention, the vertical joint sealing backup material and the horizontal joint sealing backup material have fire resistance, so it is necessary to use joint fillers for fire prevention such as glass wool separately. There is no, and the member which comprises a joint can be reduced and construction cost can be suppressed.

  Moreover, according to the waterproof structure of the outer wall joint according to the present invention, the vertical joint sealing backup material and the horizontal joint sealing backup material are the same kind of members, and therefore, the members can be made common and the construction efficiency is improved. In addition, the manufacturing cost can be reduced.

It is a schematic front view which shows an example of the waterproof structure of the outer wall joint which concerns on the 1st Embodiment of this invention. It is the sectional view on the AA line in FIG. It is the BB sectional view taken on the line in FIG. It is a schematic diagram for demonstrating the arrangement | positioning method of the vertical joint sealing backup material and the horizontal joint sealing backup material in a reverse T-shaped joint part. It is a schematic diagram for demonstrating the arrangement | positioning method of the vertical joint sealing backup material and the horizontal joint sealing backup material in a T-shaped joint part. It is a schematic diagram for demonstrating the arrangement | positioning method of the vertical joint sealing backup material and the horizontal joint sealing backup material in a cross joint part. It is a schematic horizontal sectional view which shows an example of the method of the press injection to the horizontal joint of a horizontal joint watertight material. It is a principal part horizontal sectional view which shows an example of the waterproof structure of the outer wall joint which concerns on the 2nd Embodiment of this invention. It is a principal part vertical sectional view which shows an example of the waterproof structure of the outer wall joint which concerns on the 2nd Embodiment of this invention.

  Hereinafter, the waterproof structure of the outer wall joint according to the first embodiment of the present invention will be described with reference to the drawings. As shown in FIG. 1, the waterproof structure 1 of the outer wall joint according to the present invention allows rainwater or the like to enter the indoor side from the vertical joint 3 and the horizontal joint 4 formed by arranging a plurality of outer wall panels 2 side by side vertically and horizontally. This is to prevent this from happening. As shown in FIG. 1, the outer wall joint has a portion where the upper and lower vertical joints 3 are divided by the horizontal joint 4 and formed in a tear joint shape that causes a discrepancy in the upper and lower sides without being in a straight line. Inverted T-shaped joint portion O formed by the lower end side of the vertical joint 3 abutting the lower horizontal joint 4 and T-shaped joint portion P formed by the upper end side of the vertical joint 3 abutting the upper horizontal joint 4. And a cross joint portion Q formed by intersecting the vertical joint 3 and the horizontal joint 4. The waterproof structure 1 of the outer wall joint is configured so that a drainage path as shown by an arrow in FIG. 1 can be formed in order to drain rainwater or the like that has entered from the vertical joint 3 or the horizontal joint 4 to the outside.

  As shown in FIG. 2, the outer wall joint waterproof structure 1 prevents rainwater and the like from entering the indoor side from the vertical joint 3 into the vertical joint 3 formed between the outer wall panels 2 provided adjacent to the left and right. The vertical joint sealing material 5 that functions as a primary waterproofing material, and the vertical joint sealing material 5 is press-fitted into the indoor side to back up the vertical joint sealing material 5 and to prevent vertical joint sealing material 5 from malfunctioning. A vertical joint sealing backup material 6 that functions as a secondary waterproofing material for preventing water that has passed through the material 5 from entering the indoor side is provided.

  Further, as shown in FIG. 3, the waterproof structure 1 of the outer wall joint is infiltrated with rainwater or the like from the side joint 4 to the indoor side in the horizontal joint 4 formed between the outer wall panels 2 provided adjacent to the top and bottom. The horizontal joint sealing material 7 that functions as a primary waterproofing material to prevent water, and is pressed into the indoor side from the horizontal joint sealing material 7 to back up the horizontal joint sealing material 7 and to prevent the horizontal joint sealing material 7 from malfunctioning. A horizontal joint sealing backup material 8 that functions as a secondary waterproofing material to prevent water that has passed through the ground sealing material 7 from entering the indoor side, and is disposed more indoors than the horizontal joint sealing backup material 8 A horizontal joint waterproof material 9 is provided.

  As shown in FIG. 2, the vertical joint sealing material 5 fills the vertical joint 3 to ensure the waterproof property of the vertical joint 3. As this vertical joint sealant 5, for example, a conventionally known wet sealant such as polyurethane, silicon, or polysulfide can be used.

  The vertical joint sealing backup material 6 is a joint material pressed into the indoor side of the vertical joint 3 with respect to the vertical joint sealing material 5 and is formed narrower than the joint width of the vertical joint 3 as shown in FIG. The backup portion 61 for backing up the vertical joint sealing material 5, the connecting portion 62 projecting in the indoor direction from the center in the width direction of the backup portion 61, and fixed to the indoor side of the connecting portion 62, and the vertical joint sealing material The vertical joint 3 is closed so as to waterproof rainwater W or the like entering from 5, and a vertical joint water-stopping portion 63 that forms a vertical drainage space S 1 that flows downward.

  The backup unit 61 is formed in a flat band shape by, for example, an elastic resin. As shown in FIG. 2, the vertical joint water-stop portion 63 is fixed to the indoor end portion of the connecting portion 62, and the support that protrudes in the indoor direction from the center in the width direction of the fireproof portion 64. And a water stop fin portion 66 fixed to the indoor side of the support portion 65.

  The fireproof portion 64 has fireproof properties, is fixed to the backup portion 61 via the connecting portion 62, and is formed in a strip shape wider than the joint width of the vertical joint 3. The refractory portion 64 has elasticity, and the end 64a in the width direction is formed in a fin shape so as to prevent the rainwater W or the like from entering the outdoor side, and a thermal expansion fireproof material 67 is formed inside. It is stored. The fireproof part 64 is fixed in a state where both ends in the width direction are curved in the vertical joint 3 and are sandwiched between the small edge surfaces of the outer wall panels 2 adjacent to the left and right.

  The water stop fin portion 66 is fixed to the indoor end of the support portion 65, extends from the support portion 65 to both sides in the width direction (left and right direction), and is formed wider than the joint width of the vertical joint 3. Has been. Further, the water stopping fin portion 66 is formed in a fin shape with an elastic resin so as to prevent the rainwater W or the like from entering the outdoor side. The water stop fin portions 66 are fixed in a state where both ends in the width direction are curved in the vertical joint 3 and are sandwiched between the small edge surfaces of the left and right outer wall panels 2. Thereby, the vertical drainage space S <b> 1 is formed between the water stop fin portion 66 and the fireproof portion 64.

  As shown in FIG. 3, the horizontal joint sealing material 7 ensures the waterproof property of the horizontal joint 4 by filling the horizontal joint 4. As the horizontal joint sealing material 7, similarly to the vertical joint sealing material 5, for example, a conventionally known wet sealing material such as polyurethane, silicon, or polysulfide can be used.

  The horizontal joint sealing backup material 8 is a joint material that is pressed into the indoor side of the horizontal joint 4 more than the horizontal joint sealing material 7, and for example, the same type of member as the vertical joint sealing backup material 6 can be suitably used. As shown in FIG. 3, the back joint 81 is formed to be narrower than the joint width of the lateral joint 4, and protrudes in the indoor direction from the center in the width direction of the backup part 81. And a horizontal drainage space S2 that is fixed to the indoor side of the connecting portion 82 and closes the horizontal joint 4 so as to waterproof rainwater W entering from the horizontal joint sealing material 7 and flows in the horizontal direction. It has the horizontal joint water stop part 83 to form.

  The backup unit 81 is formed in a flat strip shape by, for example, an elastic resin. As shown in FIG. 3, the horizontal joint water-stop portion 83 is fixed to the indoor side end of the connecting portion 82, and the support that protrudes in the indoor direction from the center in the width direction of the fire-resistant portion 84. Part 85 and a water-stopping fin part 86 fixed to the indoor side of the support part 85.

  The refractory portion 84 has fire resistance, is fixed to the backup portion 81 via the connecting portion 82, and is formed in a strip shape wider than the joint width of the horizontal joint 4. This refractory portion 84 has elasticity, and its end portion 84a in the width direction is formed in a fin shape so as to prevent the rainwater W or the like from entering the outdoor side, and a thermal expansion fireproof material 87 is formed inside. It is stored. The fireproof portion 84 is fixed in a state where both ends in the width direction are curved in the horizontal joint 4 and sandwiched between the upper and lower outer wall panels 2.

  The water stop fin portion 86 is fixed to the indoor end of the support portion 85, extends from the support portion 85 to both sides in the width direction (vertical direction), and is formed wider than the joint width of the horizontal joint 4. Has been. Further, the water stopping fin portion 86 is formed in a fin shape with an elastic resin so as to prevent the rainwater W or the like from entering the outdoor side. The water stop fin portion 86 is fixed in a state where both ends in the width direction are curved in the horizontal joint 4 and sandwiched between the upper and lower outer wall panels 2. As a result, a lateral drainage space S <b> 2 is formed between the water stop fin portion 86 and the fireproof portion 84. Further, the vertical joint sealing backup material 6 and the horizontal joint sealing backup material 8 are formed so that the vertical drainage space S1 and the horizontal drainage space S2 communicate with each other to form a drainage path as indicated by an arrow in FIG. As shown in FIGS. 6 to 6, the vertical joint waterproofing portion 63 and the horizontal joint waterproofing portion 83 are arranged so that the vertical and horizontal positions thereof are aligned, and the vertical joint sealing backup material 6 becomes the horizontal joint sealing backup material 8. It arrange | positions so that it may become a vertical win.

  The horizontal joint waterproof material 9 prevents the water from entering the indoor side through the joint of the vertical joint sealing backup material 6 and the horizontal joint sealing backup material 8 in the inverted T-shaped joint portion O, and the T-shaped joint portion. In P, the water passing through the space S3 on the back side of the horizontal joint sealing backup material 8 is made to flow so as to contact the vertical joint sealing backup material 6, and as shown in FIGS. 2 and 3, the horizontal joint sealing backup It is press-fitted into the horizontal joint 4 on the indoor side of the material 8. The horizontal joint waterproofing material 9 is a watertight material that is long in the horizontal direction and has a substantially rectangular longitudinal section, and is made of, for example, foamed polyethylene or the like. Further, the horizontal joint waterproofing material 9 is disposed so that the surface on the outdoor side thereof is in contact with the back surface of the horizontal joint sealing backup material 8 and the end is slightly protruded in the vertical joint 3.

  Hereinafter, an example of a construction method of the waterproof structure 1 for an outer wall joint according to the present invention will be described with reference to the drawings. On the side joint 4 side of the waterproof structure 1 of the outer wall joint, as shown in FIGS. 2 and 3, the side joint waterproof material 9 is first press-fitted into the side joint 4 from the outdoor side. At this time, the horizontal joint waterproofing material 9 does not necessarily need to be press-fitted to a predetermined proper position, and may be temporarily inserted from the predetermined proper position to about a few millimeters.

  Thereafter, the horizontal joint sealing backup material 8 is press-fitted from the outdoor side to a predetermined appropriate position in the horizontal joint 4. At this time, the horizontal joint waterproofing material 9 is pushed together with the horizontal joint sealing backup material 8 to press-fit the horizontal joint waterproofing material 9 to a predetermined proper position. The waterproof material 9 is disposed in the horizontal joint 4 in contact with the outdoor surface. In addition, as shown in FIG. 7, the seam part in the middle of the outer wall panel 2 between the horizontal joint waterproofing materials 9 is continuously pushed so as not to generate a gap by being pushed in from a state where each end part side is slightly left. The position of the joint portion between the horizontal joint waterproofing materials 9 is not particularly limited, and may be set as appropriate according to the structure of the joint. Further, the horizontal joint sealing backup material 8 is fixed in a state where both ends of the fireproof portion 84 and the waterstop fin portion 86 are curved in the horizontal joint 4 and sandwiched between the upper and lower outer wall panels 2. Is done. Then, the vertical joint sealing material 5 is filled into the vertical joint 3 into which the vertical joint sealing backup material 6 is press-fitted from the outdoor side.

  On the other hand, on the vertical joint 3 side of the waterproof structure 1 of the outer wall joint, as shown in FIG. 2, first, the vertical joint sealing backup material 6 is installed in the vertical and horizontal directions of the vertical joint waterproof part 63 and the horizontal joint waterproof part 83 from the outdoor side. By press-fitting to a predetermined appropriate position in the vertical joint 3 where the positions are aligned, the vertical drainage space S1 and the horizontal drainage space S2 are communicated to form a drainage path. At this time, the vertical joint sealing backup material 6 is curved between the both ends of the fireproof portion 64 and the waterstop fin portion 66 in the vertical joint 3 and sandwiched between the small edge surfaces of the outer wall panels 2 adjacent to the left and right. Fixed in a fixed state. Further, as shown in FIG. 4, the vertical joint sealing backup material 6 has a lower end forming the horizontal joint 4 at the inverted T-shaped joint so that the vertical joint sealing backup material 8 wins the vertical joint with respect to the horizontal joint sealing backup material 8. 5 is arranged in contact with the upper end surface of the outer wall panel 2 on the side, and the upper end of the T-shaped joint portion is on the lower end surface of the upper outer wall panel 2 forming the horizontal joint 4 as shown in FIG. It arrange | positions in the state contact | abutted. Then, the vertical joint sealing material 5 is filled into the vertical joint 3 into which the vertical joint sealing backup material 6 is press-fitted from the outdoor side.

  In the waterproof structure 1 of the outer wall joint configured as described above, the vertical joint sealing material 5 or the horizontal joint sealing material 7 functioning as a primary waterproof material has some problems, and the vertical joint sealing material 5 or the horizontal joint sealing material 7. When rainwater W or the like passes through, the vertical joint sealing backup material 6 or the horizontal joint sealing backup material 8 located immediately behind prevents rainwater W or the like from entering the indoor side, and the vertical drainage space S1 and the horizontal drainage. Using all the area | region of space S2 as a drainage path, water is led to the lower end of the lowermost outer wall panel 2, and it discharges | emits outside.

  Further, in the inverted T-shaped joint portion O as shown in FIGS. 1 and 4, as shown in FIGS. 2 and 3, the vertical joint sealing back-up material is provided by the horizontal joint waterproof material 9 press-fitted into the horizontal joint 4. 6 prevents the small amount of water W which may fall from the seam 6 and pass through the joint between the vertical joint sealing backup material 6 and the horizontal joint sealing backup material 8 from entering the indoor side, and the horizontal joint sealing backup material. 8 has passed through the joint between the vertical joint sealing backup material 6 and the horizontal joint sealing backup material 8 by using the space S3 formed between the back surface of the horizontal joint waterproofing material 9 and the outdoor side surface of the horizontal joint waterproofing material 9 as a drainage space. A small amount of water W is guided horizontally.

  Further, in the T-shaped joint portion P as shown in FIGS. 1 and 5, the water passing through the space S3 on the back surface of the horizontal joint sealing backup material 8 is applied to the back surface of the vertical joint sealing backup material 6 by the horizontal joint waterproof material 9. Water can be introduced so as to come into contact with the water and flow downward. Moreover, in the cross joint part Q as shown in FIG.1 and FIG.6, the water W which flows and falls from the vertical joint sealing material 5 flows down below as it is. Then, the water W passing through the horizontal drainage space S2 of the horizontal joint sealing backup material 8 is led to the vertical drainage space S1 and flows downward, and the water W passing through the space S3 on the back surface of the horizontal joint sealing backup material 8 is Water is introduced so as to contact the back surface of the vertical joint sealing backup material 6 and flows downward.

  Thereby, in the waterproof structure 1 of the outer wall joint which concerns on this invention, even in the outer wall joint which has the reverse T-shaped joint part O and the T-shaped joint part P, the penetration | invasion of water to an indoor side is possible, without using a dedicated member etc. In addition to preventing this, the drainage path as shown in FIG. 1 can be formed continuously, so that water can be reliably drained to the outside. Incidentally, the rainwater and the like that finally flowed downward through the drainage path as shown in FIG. 1 is not shown in detail, but is conventionally provided on the lower end side of the lowermost outer wall panel 2, for example. The water is drained to the outside through a known drainage or the like.

  Next, an outer wall joint waterproof structure 1a according to a second embodiment of the present invention will be described with reference to FIGS. In addition, about the structure similar to the waterproof structure 1 of the outer wall joint which concerns on 1st Embodiment, the same code | symbol is attached | subjected and the detailed description is abbreviate | omitted.

  As shown in FIGS. 8 and 9, the outer wall panel 2 a of the waterproof structure 1 a of the outer wall joint has a frame member 22 fixed to the periphery of the back surface of the rectangular plate-shaped siding material 21. The frame member 22 is formed of a grooved steel having a substantially U-shaped cross section that is open in the joint direction. The frame member 22 is formed on the rear surface of the siding member 21 so as to be flush with the upper and lower end surfaces and both end surfaces of the siding member 21. The folded piece 24 is folded back to the indoor side from the contact portion 23 that is in contact with the peripheral edge, and the folded piece 24 is folded downward from the indoor front end of the folded piece 24a that is flush with the upper end surface of the siding material 21. Mounting piece 25.

  Further, as shown in FIG. 9, the lateral joint waterproof material 9a of the waterproof structure 1a of the outer wall joint is located on the indoor side with respect to the attachment portion 91 attached to the attachment piece 25 of the frame member 22 and the lateral joint sealing backup material 8a. And an inclined portion 92 for allowing water passing through the back of the horizontal joint sealing backup material 8a to flow along the back of the vertical joint sealing backup material 6a.

  For example, the attachment portion 91 is formed of a hard material such as plastic or metal so that the thickness of the inner groove portion is substantially the same as the thickness of the attachment piece 25. The inclined portion 92 is formed of, for example, an elastic resin, and has an inclined surface with a downward slope toward the outdoor direction. The inclined portion 92 has a shape in which the cross section is curved in an arc shape convex toward the indoor side so that the height of the inclined surface gradually decreases toward the outdoor direction.

  The horizontal joint waterproofing material 9a is, for example, the frame material 22 by fitting the groove portion of the attachment portion 91 into the attachment piece 25 from below with the inclined portion 92 raised to the indoor side, and returning the inclined portion 92 to the original state. Attached to. Further, the horizontal joint waterproofing material 9a is designed so that the length in the width direction coincides with the width of the outer wall panel 2a or slightly protrudes from the outer wall panel 2a. As shown in FIG. And the end of the outer wall panel 2a are aligned or slightly protruded from the end of the outer wall panel 2a. As shown in FIG. 9, the outdoor side tip of the inclined portion 92 is pressed against the upper end surface of the lower siding material 21 and the folded piece 24 a by the water stop fin portion 86 a of the horizontal joint sealing backup material 8 a. It is fixed with. Thereby, the horizontal joint waterproof material 9a can aim at the waterproof improvement as a tertiary waterproof material. Moreover, in the waterproof structure 1a of the outer wall joint, for example, when the outer wall panel 2a is manufactured at a factory, the horizontal joint waterproof material 9a is attached to the attachment piece 25 of the frame member 22 in advance, so that It is possible to reduce the trouble of attaching the ground waterproof material 9a.

  In the waterproof structure 1a of the outer wall joint configured as described above, in the inverted T-shaped joint portion O as shown in FIGS. 1 and 4, the vertical joint sealing backup is provided by the horizontal joint waterproofing material 9a disposed on the horizontal joint 4. This prevents a small amount of water W that may flow down from the material 6a and pass through the joint between the vertical joint sealing backup material 6a and the horizontal joint sealing backup material 8a from entering the indoor side, and also serves as a horizontal joint sealing backup. By using the space S3 formed between the back surface of the material 8a and the inclined portion 92 of the horizontal joint waterproofing material 9a as a drainage space, the joint of the vertical joint sealing backup material 6a and the horizontal joint sealing backup material 8a has been passed. A small amount of water W is guided horizontally.

  Further, in the waterproof structure 1a of the outer wall joint, in the T-shaped joint portion P as shown in FIGS. 1 and 5, the water passing through the space on the back surface of the horizontal joint sealing backup material 8a is vertically jointed by the horizontal joint waterproofing material 9a. Water can be guided so as to contact the back surface of the sealing backup material 6a and flow downward. Thereby, in the waterproof structure 1a of the outer wall joint, in the outer wall joint having the inverted T-shaped joint portion O and the T-shaped joint portion P, water can be prevented from entering the indoor side, and the drainage path as shown in FIG. Can be formed continuously, so that water can be reliably drained to the outside.

  Moreover, as shown in FIG.8 and FIG.9, the water stop fin part 66a and the water stop fin part 86a of the vertical joint sealing backup material 6a and the horizontal joint sealing backup material 8a of the waterproof structure 1a of the outer wall joint are as shown in FIGS. Each of the cross sections is formed in a bifurcated shape. The water stop fin portions 66a are curved at both ends in the width direction in the vertical joint 3 and sandwiched between the small edge surfaces of the siding material 21 of the left and right outer wall panels 2 and between the folded pieces 24 of the frame material 22. Fixed in a fixed state. Further, both ends of the water stop fin portion 86a are curved in the horizontal joint 4, and are sandwiched between the siding members 21 of the outer wall panels 2 adjacent to each other in the vertical direction and the folded pieces 24 of the frame member 22. Fixed in state. Thus, in the waterproof structure 1a of the outer wall joint, the folded piece 24 of the frame member 22 is also used to fix the bifurcated water-stopping fin portion 66a and the water-stopping fin portion 86a to the vertical joint 3 and the horizontal joint 4 respectively. Therefore, even when the siding material 21 is thin, the vertical joint sealing backup material 6a and the horizontal joint sealing backup material 8a can be stably disposed on the vertical joint 3 and the horizontal joint 4, respectively.

  In addition, embodiment of this invention is not restricted to the above-mentioned form, It can change suitably in the range which does not deviate from the range of the thought of this invention.

DESCRIPTION OF SYMBOLS 1, 1a Waterproof structure 2 of outer wall joint 2, 2a Outer wall panel 21 Siding material 22 Frame member 23 Contact part 24 Folding piece 25 Mounting piece 3 Vertical joint 4 Horizontal joint 5 Vertical joint sealing material 6 Vertical joint sealing backup material 63 Vertical joint stop Water section 7 Horizontal joint sealing material 73 Horizontal joint waterproofing section 8 Horizontal joint sealing backup material 9, 9a Horizontal joint waterproofing material 91 Mounting portion 92 Inclined portion O Cross joint portion P T-shaped joint portion Q Reverse T-shaped joint portion S1 Vertical drainage Space S2, S3 Horizontal drainage space W Water (Rainwater)

Claims (5)

T-shape formed by the upper end side of the vertical joint between the outer wall panels provided adjacent to the left and right butting against the horizontal joint between the outer wall panel provided adjacent to the left and right and the outer wall panel provided thereabove. Formed by the lower end side of the vertical joint between the joint part and the outer wall panel provided adjacent to the left and right abuts against the horizontal joint between the outer wall panel provided adjacent to the left and right and the outer wall panel provided below the panel. A waterproof structure of an outer wall joint having an inverted T-shaped joint part,
A vertical joint sealing material filled in the vertical joint to prevent water from entering from the vertical joint between the outer wall panels provided adjacent to the left and right into the indoor side;
The vertical joint is pressed into the indoor side of the vertical joint from the vertical joint sealing material, and the vertical joint is closed so as to waterproof the water entering from the vertical joint sealing material, and a vertical drainage space is formed to flow downward. A vertical joint sealing backup material having a vertical joint water stop, and
A horizontal joint sealing material filled in the horizontal joint to prevent water from entering the indoor side from a horizontal joint between outer wall panels provided adjacent to the upper and lower sides;
Pressed into the indoor side of the horizontal joint from the horizontal joint sealing material, closes the horizontal joint so as to waterproof the water entering from the horizontal joint sealing material, and forms a horizontal drainage space that flows horizontally. A horizontal joint sealing back-up material having a horizontal joint water-stopping part,
The vertical joint water-stopping portion is provided with a fin-like first water-stopping fin portion extending in the width direction at an end portion in the width direction, and the first water-stopping fin portion is provided on the left and right outer wall panels. And is sandwiched between the vertical joints in a state of being in contact with the facet of the first wall and between the facet located on the outdoor side of the first waterstop fin part of the outer wall panel and the first waterstop fin part. Forming the vertical drainage space in the enclosed space,
The horizontal joint water-stopping portion is provided with a fin-like second water-stopping fin portion extending in the width direction at an end portion in the width direction, and the second water-stopping fin portion is provided on the upper and lower outer wall panels. Between the horizontal joint and in contact with the small face surface of the outer wall panel, the outer face panel is located on the outer face side of the second water stop fin portion and the second water stop fin portion. Forming the lateral drainage space in the enclosed space;
The vertical joint sealing backup material is arranged in a vertical win with respect to the horizontal joint sealing backup material such that the vertical drainage space and the horizontal drainage space communicate with each other to form a drainage path.
In the horizontal joint, in the inverted T-shaped joint portion, water is prevented from entering the indoor side from the joint of the vertical joint sealing backup material and the horizontal joint sealing backup material, and in the T-shaped joint portion, A horizontal joint waterproofing material for allowing the water passing through the back of the horizontal joint sealing backup material to flow in contact with the vertical joint sealing backup material is disposed in contact with the end portion on the indoor side of the horizontal joint sealing backup material. The waterproof structure of the outer wall joint characterized by being.   The waterproof structure for an outer wall joint according to claim 1, wherein the horizontal joint waterproofing material is a watertight material that is pressed into the indoor side more than the horizontal joint sealing backup material.   The said horizontal joint waterproofing material is located in the said indoor side rather than the said horizontal joint sealing backup material, and has the inclined part in which the inclined surface of the downward slope is formed toward the outdoor direction, It is characterized by the above-mentioned. Item 10. A waterproof structure for an outer wall joint according to Item 1.   The waterproof structure for an outer wall joint according to any one of claims 1 to 3, wherein the vertical joint sealing backup material and the horizontal joint sealing backup material have fire resistance.   The waterproof structure for an outer wall joint according to any one of claims 1 to 4, wherein the vertical joint sealing backup material and the horizontal joint sealing backup material are the same kind of members.

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