JP2007205086A - Waterproof structure between walls - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily secure a waterproof structure in closing a clearance part formed between both upper and lower external wall panels, with a waterproof sheet, and to maintain a waterproof effect over a long period of time by stably supporting the waterproof sheet. <P>SOLUTION: The waterproof sheet 21 is mounted beforehand to a back face part of the upper floor external wall panel 12, and the waterproof sheet 21 is hung on the surface side of the lower floor external wall panel 11. The clearance 17 is thereby closed with the waterproof sheet 21. A backup hardware 51 is disposed on the indoor side of the waterproof sheet 21. A base part 52 of the backup hardware 51 is disposed and fixed to the upper face of the lower floor external wall panel 11, and a clearance closing part 53 supporting the waterproof sheet 21 from the indoor side is extended upward from the outdoor side of the base part 52. The movement such as flexure to the indoor side of the waterproof sheet 21 can thereby be restrained to stabilize the waterproof sheet 21. Consequently, the lower end of the waterproof sheet 21 does not necessarily have to be bonded. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an inter-wall waterproof structure that waterproofs a gap formed between an upper outer wall panel and a lower outer wall panel of a building.

  A gap is formed between the upper outer wall panel constituting the outer wall and the lower outer wall panel disposed below the upper outer wall panel. In order to prevent water such as rainwater from entering the inside of the building from the gap, a waterproof structure between walls including a waterproof sheet has been proposed.

  In this type of waterproof structure between walls, the waterproof sheet has an upper end fixed to the back surface of the upper outer wall panel and a lower end bonded to the surface of the lower outer wall panel (see, for example, Patent Document 1). ). In addition, brackets are attached to the outdoor side of the waterproof sheet adhered to the surface portion of the lower outer wall panel at a predetermined interval. Further, a decorative cover is attached to the outdoor side of the bracket so as to cover the gap and the waterproof sheet.

  With the above configuration, rainwater and other water that enters the gap from between the upper end of the decorative cover and the upper outer wall panel flows down the outdoor side of the waterproof sheet and is then guided to the surface side of the lower outer wall panel. . Moreover, even if water such as rainwater enters from between the lower end of the decorative cover and the lower outer wall panel by being blown by the wind, as a result, it is received on the surface side of the waterproof sheet, Since it is bonded to the outer wall panel, intrusion of water from this portion is avoided.

  However, in the conventional waterproof structure between walls, the lower outer wall panel and the waterproof sheet are bonded at the construction site, so that there is a problem that it takes time for the bonding work. In particular, if there is a poor adhesion, the adhesion between the lower outer wall panel and the waterproof sheet will be reduced and the waterproofing effect will be reduced. Difficulty is high.

Further, since the lower outer wall panel and the waterproof sheet are fixed by adhesion, it is also conceivable that peeling of the bonded portion occurs due to a load applied to the waterproof sheet. The load applied to the waterproof sheet cannot be ignored because it involves not only the weight of the waterproof sheet but also the wind pressure applied to the waterproof sheet. If the adhesive state between the waterproof sheet and the lower outer wall panel becomes insufficient, the positioning effect may be ensured by the brackets provided at predetermined intervals, but the waterproof effect is also lowered.
Japanese Examined Patent Publication No. 6-39809

  The present invention is easily waterproofed when a gap formed between an upper outer wall panel constituting an outer wall of a building and a lower outer wall panel disposed below the upper outer wall panel is closed with a waterproof sheet. The main object is to obtain a waterproof structure between walls that can secure the structure and can maintain the waterproof effect for a long time by stably supporting the waterproof sheet.

Means effective for solving the above-described problems will be described with reference to actions, effects, and more detailed means as needed. In order to facilitate understanding, the main configuration corresponding to the embodiment of the invention is appropriately shown in parentheses, but is not limited to the specific configuration shown in parentheses.

  The gap formed between the upper outer wall panel (upper floor outer wall panel 12) constituting the outer wall of the building in the present invention and the lower outer wall panel (lower floor outer wall panel 11) disposed below the upper outer wall panel. In the inter-wall waterproof structure that closes the gap (gap 17), the waterproof sheet (waterproof sheet 21) that closes the gap and the waterproof sheet is supported from the indoor side in the gap to the indoor side of the waterproof sheet. And supporting means (backup hardware 51) for suppressing the movement of.

  In the waterproof structure between walls, the waterproof sheet can prevent water such as rainwater from entering the interior from the gap. And the indoor side of a waterproof sheet is supported by the support means, and the movement to the indoor side beyond it is suppressed. As a result, the waterproof sheet is not bent more than a predetermined amount toward the indoor side, and the waterproof sheet can be held in a stable state. This is because when the waterproof sheet is attached above and below the gap portion, the region of the gap portion tends to become unstable, but this can be solved by the support means. In addition, it is not always necessary to bond the lower end of the waterproof sheet, and the waterproof structure of the gap can be easily constructed.

  It is preferable that the supporting means includes a gap closing portion (gap closing portion 53) that closes the gap portion, and the waterproof sheet is supported by the gap closing portion. As a result, by closing the gap portion with the gap closing portion, the waterproof effect of the gap portion is further enhanced, and the support area on the back side of the waterproof sheet extends to the entire gap portion, and the stability of the waterproof sheet is also increased.

  Preferably, the support means includes a base portion (base portion 52) fixed to the upper surface of the lower outer wall panel, and the gap closing portion extends upward from the outdoor side of the base portion. Thereby, a base is stabilized by fixing a base to the upper surface of a lower floor outer wall panel. Further, by extending the gap closing portion upward from the outdoor side of the base, the lower end portion of the gap closing portion can be aligned with the outdoor side of the upper surface of the lower outer wall panel.

  In this case, it is preferable to seal (double-sided tape 55) between the upper surface of the lower outer wall panel and the lower surface of the base. Thereby, it is possible to prevent water from entering between the upper surface of the lower outer wall panel and the lower surface of the base.

  Moreover, it is preferable to form the said clearance obstruction | occlusion part in the downward inclination which becomes an outdoor side toward the downward direction. Accordingly, the waterproof sheet is also maintained to be inclined downward toward the outdoor side, and water such as rainwater that is about to enter the gap can be efficiently discharged.

  The upper and lower outer wall panels each include an outer wall plate (outer wall plates 13 and 14) and a frame (frames 15 and 16) attached to the back side thereof, and the waterproof sheet is disposed between the outer wall plate of the upper outer wall panel and the frame. More preferably, the waterproof sheet is attached so that the waterproof sheet extends from the attachment site along the surface of the gap closing portion, and the lower end portion is positioned on the surface side of the outer wall plate of the lower outer wall panel. With this configuration, the waterproof sheet is inclined downward from the upper part toward the lower part, and it becomes easy to fill a gap in the upper part of the waterproof sheet, and further, water such as rainwater reaching the surface of the waterproof sheet is placed on the lower outer wall. It can be guided to the outer wall plate surface side of the panel. As a result, the waterproof effect by the waterproof sheet is enhanced. And since the said waterproof sheet extends along a gap obstruction | occlusion part in a gap | interval part, a state with a high waterproof effect can be maintained over a long period of time.

Further, when the upper end portion of the gap closing portion is brought into contact with the frame of the upper outer wall panel, the waterproof effect of the gap closing portion itself is enhanced, the stability of the gap closing portion is increased, and the stability of the waterproof sheet is consequently increased. Increase.

  Next, regarding the lower part of the waterproof sheet, the lower part is disposed on the surface side of the lower outer wall panel, and the entire width direction of the lower part of the waterproof sheet is pressed against the surface side of the lower outer wall panel. It is preferable to include pressing means (the decorative cover 23 and the pressing protrusion 41) that sandwich the entire width direction of the lower portion of the waterproof sheet together with the panel.

  If comprised in this way, the lower part of a waterproof sheet will not float, and it can prevent that water, such as rain water which is going to infiltrate from between a pressing means and a lower side outer wall panel, enters an indoor side. . Moreover, since the lower part of the waterproof sheet is pressed against the lower outer wall panel by pressing by the pressing means, there is no need to perform any bonding work at the construction site when processing the lower part of the waterproof sheet. As a result, construction workability is improved and water intrusion due to poor adhesion can be avoided.

  Here, the said press means can be comprised by the makeup | decoration cover (decoration cover 23) which obstruct | occludes the clearance gap between upper and lower outer wall panels from the outdoor side. By configuring the pressing means with the decorative cover, there is an advantage that it is not necessary to separately provide a member dedicated to pressing.

  In this case, it is preferable to form a pressing portion (pressing protrusion 41) for pressing the lower portion of the waterproof sheet by extending the lower end portion of the decorative cover to the lower outer wall panel, and forming the pressing means by the pressing portion. By comprising in this way, it can respond only by the shape change of a decorative cover.

  Further, it is more preferable that an elastic body (lower seal member 43) extending across the entire width direction of the lower portion of the waterproof sheet is interposed between the pressing portion and the lower portion of the waterproof sheet. By carrying out like this, it becomes possible to pinch the lower part of a waterproof sheet elastically. Therefore, even if there is a positional error or molding error between the pressing portion of the decorative cover and the surface of the lower outer wall panel, the lower part of the waterproof sheet can be securely clamped, and the clamped state can be maintained for a long time. .

  Further, it is preferable that the decorative cover is sealed between the upper and lower outer wall panels (upper seal member 38 and lower seal member 43). With this configuration, the decorative cover functions as a primary water stop means, the prevention sheet functions as a secondary water stop means, and further, the gap blockage portion functions as a tertiary water stop means. The waterproof effect is further improved.

  Hereinafter, an embodiment embodying the invention will be described with reference to the drawings. 1 is a longitudinal sectional view showing a structure between upper and lower outer wall panels, and FIG. 2 is an exploded perspective view showing the structure.

  In the building according to the present embodiment, the lower floor outer wall panel 11 is disposed on the lower floor, and the upper floor outer wall panel 12 is disposed on the upper floor to constitute a part of the outer wall. Both the upper and lower outer wall panels 11 and 12 are composed of outer wall plates 13 and 14 exposed to the outside of the building and metal frames 15 and 16 attached to the back side thereof. Each of the outer wall plates 13 and 14 determines the appearance of the building, and is formed of a material such as concrete or ceramic having a surface with, for example, a concavo-convex pattern or the like, and excellent weather resistance, in order to improve design properties. .

The lower-floor outer wall panel 11 and the upper-floor outer wall panel 12 are attached to the lower-floor building unit X and the upper-floor building unit Y, respectively. That is, the building of this embodiment is a unit building including a plurality of building units including the lower floor building unit X and the upper floor building unit Y. In addition, although detailed description of the upper and lower building units X and Y is omitted, these upper and lower boundary portions are as indicated by the alternate long and short dash lines. In the state where the upper floor building unit Y is installed above the lower floor building unit X, a gap 17 is formed between the lower end portion of the upper floor outer wall panel 12 and the upper end portion of the lower floor outer wall panel 11. Yes. The gap portion 17 is subjected to waterproofing treatment to prevent water such as rainwater from entering the building.

  Therefore, the waterproof structure of the gap portion 17 will be described below.

  The upper end portion of the waterproof sheet 21 is bonded and fixed in advance to the back side of the lower end portion of the upper floor outer wall plate 14 in the upper floor outer wall panel 12. In the present embodiment, the upper end portion of the waterproof sheet 21 is also bonded and fixed to the upper floor frame 16. The waterproof sheet 21 has a horizontally long shape along the lower end of the upper floor outer wall panel 12 and has flexibility. On the other hand, the lower end portion of the waterproof sheet 21 is suspended from the surface of the outer wall plate 13 of the lower floor outer wall panel 11. Accordingly, the waterproof sheet 21 blocks the gap 17 formed between the upper floor outer wall panel 12 and the lower floor outer wall panel 11.

  A bracket 22 is attached to the outdoor side of the waterproof sheet 21. The bracket 22 supports the decorative cover 23 as a trunk difference, and a plurality of brackets 22 are provided at predetermined intervals (for example, 1 m intervals) in the extending direction of the gap portion 17, that is, in the horizontal direction.

  The bracket 22 is made of metal and includes a main body portion 25 having a square cylindrical shape. The main body 25 has a front surface 26 and a rear surface 27 formed in a flat plate shape, and the depth dimensions of both end portions connecting them are formed short, and the body portion 25 has a thin rectangular tube shape as a whole. A plurality of screw holes 28 penetrating in the front-rear direction are formed in the lower portion of the main body portion 25. Then, the screws 22 are passed through the screw holes 28 and screwed into the lower floor outer wall plate 13 and the lower floor frame 15, whereby the bracket 22 is attached to the surface of the outer wall plate 13 of the lower floor outer wall panel 11. In this attached state, the upper end position of the bracket 22 is arranged at substantially the same position as the lower end position of the upper floor outer wall panel 12.

  A lower end portion of the waterproof sheet 21 is disposed on the back side of the bracket 22. Therefore, the waterproof sheet 21 is sandwiched between the back surface 27 of the bracket 22 and the front surface of the lower floor outer wall plate 13 and the screw 29 is penetrated. Further, the waterproof sheet 21 extends further downward than the lower end of the bracket 22.

  A metal hook 31 is integrally provided on the upper portion of the front surface 26 of the bracket 22. The hook 31 extends forward, and its distal end portion is further bent upward. The upwardly standing portion of the hook 31 is about front and rear from the base end side (lower end side) to the front end side (upper end side). It functions as a leaf spring with a large amount of movement.

  The decorative cover 23 is attached to each bracket 22. That is, the front side (front side) of the decorative cover 23 is a decorative surface 33, and makeup is applied according to the exterior of the building. On the other hand, on the upper part of the back side of the decorative cover 23, an engaging protrusion 35 hanging downward is integrally formed. The engagement protrusion 35 is formed over the entire length of the decorative cover 23.

  A flat surface 36 is formed from the rear upper end of the decorative cover 23 to the tip (lower end) of the engaging protrusion 35. The flat surface 36 is in contact with the front surface 26 of the bracket 22, and the hook 31 is engaged with the engagement protrusion 35 in this state. More specifically, the engagement protrusion 35 is sandwiched between the front surface 26 of the bracket 22 and the hook 31.

  Further, the vicinity of the upper end portion of the flat surface 36 faces the upper floor outer wall plate 14 of the upper floor outer wall panel 12, and an upper seal member 38 extending in a long shape is disposed therebetween. Therefore, the upper seal member 38 is sealed between the upper end portion of the decorative cover 23 and the lower end portion of the upper floor outer wall plate 14. The upper seal member 38 is preferably affixed in advance to the lower end of the upper floor outer wall plate 14 of the upper floor outer wall panel 12 at the factory.

  The lower end portion of the decorative cover 23 extends downward from the lower end portion of the bracket 22. A pressing protrusion 41 that protrudes rearward from the lower end of the decorative cover 23 is integrally formed. The pressing protrusion 41 protrudes to a position below the bracket 22 and is formed over the entire length direction of the decorative cover 23. A rubber lower seal member 43 made of EPDM or the like is temporarily fixed to the pressing protrusion 41 with an adhesive, a double-sided tape or the like. This fixing is performed in advance at the factory. The lower end of the waterproof sheet 21 is pressed toward the lower floor outer wall plate 13 by the pressing protrusion 41 via the lower seal member 43, and the waterproof sheet 21 is elastic based on the elasticity of the lower seal member 43. Is pinched. Thereby, the lower end part of the waterproof sheet 21 is sealed.

  Now, in this embodiment, there is a significant feature in that it has a backup hardware 51 that supports the waterproof sheet 21 from the back side. Therefore, the configuration of the backup hardware 51 will be described.

  The backup metal 51 is made of a hard metal such as iron and is formed in a long shape along the gap 17. The backup hardware 51 includes a base portion 52 whose plate surface is directed up and down. The base 52 is formed to be slightly wider than the thickness of the lower floor outer wall plate 13. The base 52 is adhered and fixed to the upper end surface of the lower-floor outer wall plate 13 with a double-sided tape 55 in a state in which the outdoor-side tip position is substantially aligned with the surface of the lower-floor outer wall plate 13. The double-sided tape 55 is a waterproof tape formed by applying a butyl rubber-based pressure sensitive adhesive to a base material, and is excellent in terms of waterproof performance and weather resistance. Therefore, between the upper end surface of the lower-floor outer wall board 13 and the base 52, it is made airtight and the entrance of water such as rainwater is prevented, and this state is maintained for a long time.

  The backup metal part 51 has a gap closing part 53 formed by being bent so as to stand upward from the outdoor side end part of the base part 52. The gap closing portion 53 is formed so as to extend straight upward from the lower end portion thereof, and to extend straight from the lower end portion toward the upper floor outer wall panel 12 while being slightly inclined toward the indoor side. The upper end of the gap closing portion 53 is in contact with a portion of the upper floor frame 16 that faces the upper floor outer wall plate 14 and projects downward from the lower end of the upper floor outer wall plate 14. Yes.

  The backup hardware 51 has a mounting portion 54 that is bent and formed so as to hang downward from the indoor side end portion of the base portion 52. The attachment portion 54 is fixed to the frame portion of the lower floor frame 15 facing the lower floor outer wall plate 13 by screws 56 from the indoor side. The screw 56 extends to a midway position of the lower floor outer wall plate 13.

  In this way, the backup hardware 51 is held in a state where the space between the base portion 52 and the lower floor outer wall plate 13 is sealed by the double-sided tape 55, and the gap portion 17 is formed by the gap closing portion 53 continuously extending from the base portion 52. Further, the upper end of the gap closing portion 53 is in contact with the frame 16 of the upper floor outer wall panel 12. Therefore, the waterproofing of the entire gap portion 17 by the backup hardware 51 is generally realized on the indoor side of the waterproof sheet 21. That is, at the upper end of the gap closing portion 53 of the backup hardware 51, although not completely waterproofed, entry of water from other parts is reliably prevented.

Further, when the relationship between the backup hardware 51 and the waterproof sheet 21 is seen, the waterproof sheet 21
Is attached to the back side of the upper floor outer wall plate 14 as described above, but is brought into contact with the surface of the gap closing portion 53 from there, and the surface of the lower floor outer wall plate 13 is inclined by the inclination of the gap closing portion 53. Is slanted along the surface of the lower-floor outer wall plate 13 from there. Accordingly, the waterproof sheet 21 is brought into contact with the gap closing portion 53 in the area of the gap portion 17 and further movement to the indoor side is prevented. Further, since the gap closing portion 53 is inclined toward the outdoor side from the upper end toward the lower end, the waterproof sheet 21 is maintained in the downward inclined state toward the outdoor side in the region of the gap portion 17. As described above, the lower end portion of the waterproof sheet 21 suspended along the surface of the lower floor outer wall plate 13 is screwed by the brackets 22 by the brackets 22 and is lowered by the pressing protrusions 41 and the lower seal member 43. The floor outer wall plate 13 is pressed and sealed.

  The waterproof structure configured as described above is realized by being constructed in the following order.

  First, in the factory, the lower-floor outer wall panel 11 and the upper-floor outer wall panel 12 are manufactured in advance, and in this embodiment, these are further attached to the lower-floor building unit X and the upper-floor building unit Y in advance. Further, the waterproof sheet 21 is bonded and fixed to the upper floor outer wall panel 12, and the upper seal member 38 is also bonded and fixed to the lower end portion of the upper floor outer wall plate 14 in advance. The upper seal member 38 may be attached in advance to the decorative cover 23 side. Further, the lower seal member 43 is fixed to the pressing protrusion 41 of the decorative cover 23 by adhesion or the like in advance. On the other hand, the bracket 22 and the decorative cover 23 are not yet attached. Further, the backup hardware 51 is not attached to the lower floor outer wall panel 11.

  At the building construction site, the lower floor building unit X is first installed on a foundation (not shown), and then the upper floor building unit Y is installed on the lower floor building unit X. By installing these building units X and Y, a gap 17 is formed between the upper and lower outer wall panels 11 and 12.

  Next, the work of attaching the backup hardware 51 is performed. That is, first, the double-sided tape 55 is attached to the upper end surface of the lower floor outer wall plate 13. After the affixing operation, the backup hardware 51 is arranged at the mounting position from the outdoor side of the gap 17. In this arrangement work, the upper end side of the gap closing portion 53 is inclined to the outdoor side, and the corner portion of the base 52 and the gap closing portion 53 is aligned with the outdoor side end portion of the upper end surface of the lower floor outer wall plate 13. The base portion 52 is rotated so as to be placed on the double-sided tape 55 with the corner portion as a fulcrum. 1 and FIG. 2 only need to be finally arranged, and other arrangement methods may be employed, and the double-sided tape 55 may be attached to the bottom surface of the base 52. is there. Thereafter, the mounting operation of the backup hardware 51 is completed by fixing the mounting portion 54 to the lower floor outer wall panel 11 with a screw 56.

  Here, if the lower end side of the waterproof sheet 21 is temporarily fixed to the surface of the upper floor outer wall plate 14 at a factory or the like, the mounting work of the backup hardware 51 can be performed smoothly. In this case, after completion of the mounting work of the backup hardware 51, the temporary fixing is removed to bring the waterproof sheet 21 along the surface of the gap closing portion 53 of the backup metal 51 and the lower end of the waterproof sheet 21. The side can be arranged on the front side of the lower floor outer wall plate 13.

Next, the bracket 22 is attached to the front side of the lower floor outer wall plate 13. The bracket 22 is attached by fastening screws 29 at predetermined intervals. When the screw 29 is fixed, the waterproof sheet 21 is fixed together with the bracket 22 by the screw 29. Here, since the back surface of the waterproof sheet 21 is received by the backup metal 51 and the lower end portion of the waterproof sheet 21 is disposed on the front surface of the lower-floor outer wall plate 13, the mounting work of the waterproof sheet 21 is very simple. And the waterproof sheet 21 is fixed to the bracket 22 at predetermined intervals by the mounting work of the bracket 22. However, at this time, the waterproof sheet 21 is not fixed at all between the adjacent brackets 22.

  Thereafter, a decorative cover 23 is attached to each bracket 22. Specifically, the decorative cover 23 is brought closer to the upper side of each bracket 22 and the engaging protrusion 35 is fitted into the hook 31. At this time, since the back side of the engaging protrusion 35 is a flat surface 36, the flat surface 36 of the decorative cover 23 comes into contact with the front surface 26 of the bracket 22 as the engaging protrusion 35 is attached to the hook 31. It will be in the state. At this time, the upper seal member 38 is sandwiched between the flat surface 36 of the decorative cover 23 and the front surface of the outer wall plate 14 of the upper floor outer wall panel 12, so that the decorative cover 23 and the outer wall plate 14 of the upper floor outer wall panel 12 are placed. Is sealed.

  Further, since the lower seal member 43 is fixed to the pressing protrusion 41 by adhesion or the like in advance on the decorative cover 23, the pressing protrusion 41 is attached to the bracket 22 by the attachment of the decorative cover 23 to the bracket 22. The lower end portion of the waterproof sheet 21 is pressed through 43. On the other hand, the lower end of the waterproof sheet 21 is received by the lower floor outer wall plate 13 on the back side. Therefore, with the attachment of the decorative cover 23 to the bracket 22, the waterproof sheet 21 is pressed against the lower-floor outer wall plate 13 side by the pressing protrusion 41 of the decorative cover 23, and the waterproof sheet 21 is horizontally spread across the entire area. It will be pinched. Moreover, since the lower side sealing member 43 is provided in the front end side of the press protrusion 41, the waterproof sheet 21 will be clamped elastically.

  According to the waterproof structure between walls described above, the building adopting the waterproof structure, and the construction method described above, the following advantageous effects can be obtained.

  In the gap 17 between the upper and lower outer wall panels 11, 12, a decorative cover 23 is provided on the foremost side, and a waterproof sheet 21 is provided on the back side thereof. The waterproof sheet 21 functions as a secondary waterproofing means, and the back-up hardware 51 functions as a tertiary waterproofing means, which allows water such as rainwater to enter the indoor side through the gap 17. Can be blocked.

  That is, with respect to the decorative cover 23 as the primary waterproofing means, the upper seal member 38 that seals between the upper end on the back surface side and the lower end of the upper floor outer wall plate 14 is interposed. Intrusion of water from between the floor exterior wall plates 14 can be blocked as much as possible. Further, the pressing protrusion 41 is maintained in a state where the pressing protrusion 41 is pressed to the lower floor outer wall plate 13 through the lower seal member 43 at the lower end portion on the back side of the decorative cover 23. Intrusion of water from between the plates 13 can be blocked as much as possible.

  Further, with respect to the waterproof sheet 21 as the secondary waterproofing means, the upper end side is bonded and fixed to the back side of the outer wall plate 14 of the upper floor outer wall panel 12, and extends from there to the front side of the outer wall plate 13 of the lower floor outer wall panel 11. Yes. Therefore, even if water enters from between the decorative cover 23 and the upper floor outer wall plate 14, the water can be received on the front side of the waterproof sheet 21, and the outer wall plate 13 of the lower floor outer wall panel 11 can be received. It can be discharged to the front side.

  Further, on the lower end side of the waterproof sheet 21 as the secondary water stop means, the waterproof sheet 21 is sandwiched between the lower floor outer wall plate 13 and the pressing protrusion 41 (more specifically, the lower seal member 43) of the decorative cover 23. And the whole horizontal direction is crimped. Therefore, the lower end portion of the waterproof sheet 21 does not float up, and it is possible to prevent water that enters from between the decorative cover 23 and the lower floor outer wall plate 13 from entering the indoor side.

In particular, the pressing protrusion 41 is made of a resin that is somewhat hard because it is integral with the decorative cover 23, but the lower seal member 43 is interposed, so that the lower end of the waterproof sheet 21 can be elastically sandwiched. It becomes possible. Therefore, even if there is a position error or a molding error between the decorative cover 23 and the lower floor outer wall plate 13, the pressure-bonded state of the waterproof sheet 21 can be reliably realized, and the pressure-bonded state can be maintained for a long time.

  And in processing of the lower end part of such a waterproof sheet 21, it is not necessary to perform any bonding work at the construction site. As a result, construction workability is improved and water intrusion due to poor adhesion can be avoided.

  Further, regarding the backup hardware 51 as the tertiary water stopping means, the gap 52 is continuously extended from the base 52 while the space between the base 52 and the lower floor outer wall plate 13 is sealed by the double-sided tape 55. Thus, the gap 17 is closed, and the upper end of the gap closing part 53 is in contact with the frame 16 of the upper floor outer wall panel 12. Therefore, the entire gap 17 can be made substantially waterproof by the backup hardware 51. That is, the upper end of the gap closing portion 53 of the backup metal 51 is not completely waterproofed, but water can be prevented from entering from other parts.

  Further, the waterproof sheet 21 is in contact with the gap closing portion 53 of the backup hardware 51 in the area of the gap portion 17 and is prevented from further moving to the indoor side. Accordingly, the position of the waterproof sheet 21 in the region of the gap portion 17 is stabilized, and no bending that protrudes downward due to the weight of the waterproof sheet 21 itself occurs. And even if loads, such as a wind pressure, act from the outdoor side, since the stable state of the waterproof sheet 21 is hold | maintained, the waterproof performance in the gap | interval part 17 can be maintained over a long period of time.

  Further, the waterproof sheet 21 has a downward slope that becomes the outdoor side downward in the region of the gap portion 17 due to the backup hardware 51. Moreover, since it is a linear downward slope, rainwater that has reached the waterproof sheet 21 Therefore, there is an advantage that the water does not stay on the surface of the waterproof sheet 21.

  In particular, since the gap closing portion 53 of the backup hardware 51 extends from the upper end surface of the lower floor outer wall plate 13 to a position where it comes into contact with the upper floor frame 16, the stability of the waterproof sheet 21 is maintained over the entire area of the gap portion 17. can do.

  Furthermore, even if water such as rainwater may enter from between the lower end of the waterproof sheet 21 and the surface of the lower floor outer wall plate 13 due to wind blown from below, the lower floor outer wall plate 13 Since the space between the upper end surface and the base portion 52 is sealed, water does not enter the indoor side from between them, and even when the water moves upward, it stands up to close the gap portion 17. Due to the gap blockage portion 53, it becomes difficult for water to move upward to some extent, and water intrusion into the indoor side is prevented.

  Note that the present invention is not limited to the embodiment described above, and can be implemented, for example, in the form shown as another example below.

  In the above embodiment, the inter-wall waterproof structure for the gap portion 17 formed between the lower-floor outer wall panel 11 and the upper-floor outer wall panel 12 is illustrated, but the rectangular outer wall panel in a building having a gable roof The above-mentioned waterproof structure between walls may be applied to a gap formed between the wall and the triangular end wall panel.

  In the above embodiment, the bracket 22 is configured to be fixed to the lower floor outer wall panel 11 with screws 29, but may be configured to be mounted on the upper floor outer wall panel 12 or on both the upper and lower outer wall panels 11 and 12. .

  In the above embodiment, the unit building in which the upper and lower outer wall panels 11 and 12 are previously attached to the building units X and Y has been described. However, the present invention can be applied to a building that does not use the building unit.

  In the above embodiment, the upper end portion of the waterproof sheet 21 is bonded to the upper floor outer wall plate 14 and the upper floor frame 16, respectively, but may be bonded to only one of them. Further, it may be attached by screwing or the like instead of adhesion.

  In the above embodiment, the lower end of the waterproof sheet 21 is pressed to the surface side of the lower floor outer wall plate 13 by the pressing protrusion 41 at the lower end of the decorative cover 23, more specifically, the lower seal member 43, and the lower end of the waterproof sheet 21 is pressed. Although the entire region in the width direction of the portion is sandwiched, the configuration is not necessarily required. That is, in the above-described embodiment, the waterproof sheet 21 is held in a stable state by the backup hardware 51, and even if water such as rainwater enters from the lower end of the waterproof sheet 21, it has a function of blocking this as described above. Therefore, pressing by the decorative cover 23 is not essential.

  In the above-described embodiment, the gap closing portion 53 of the backup hardware 51 is formed in a flat shape, but may be formed in a curved surface as long as it is downwardly inclined toward the outdoor side. Moreover, although it comprised so that the base 52 might be mounted and affixed on the upper end surface of the lower floor outer wall board 13, you may comprise so that it may fix in the state sealed on the surface side of the lower floor outer wall board 13. FIG. Furthermore, although the example in which the upper end of the gap closing portion 53 is brought into contact with the upper floor frame 16 is shown, the waterproof effect of the gap portion 17 by the backup hardware 51 can be enhanced by sealing the contact portion with a sealing material. Is possible. Furthermore, if the lower end portion of the waterproof sheet 21 is assumed to be sandwiched and sealed between the lower floor outer wall plates 13 by pressing from the pressing protrusion 41 or the like, the gap closing portion 53 of the backup hardware 51 is at least the waterproof sheet 21. As long as it has a function of supporting the movement to the indoor side on the back surface, it is not necessary to use a plate material that closes the entire gap portion 17, and a net-like material can be arranged.

The longitudinal cross-sectional view which shows the structure between the upper and lower outer wall panels in this embodiment. The exploded perspective view of the structure.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 11 ... Lower floor outer wall panel as lower side outer wall panel, 12 ... Upper floor outer wall panel as upper side outer wall panel, 13 ... Lower floor outer wall board, 14 ... Upper floor outer wall board, 15 ... Lower floor frame, 16 ... Upper floor frame , 17 ... gap part, 21 ... waterproof sheet, 22 ... bracket, 23 ... decorative cover as pressing means, 29 ... screw as fastening means, 31 ... hook, 35 ... engaging ridge as engaging part, 38 ... Upper sealing member 41... Pressing means, pressing protrusion as pressing portion, 43. Lower sealing member as elastic body, 51. Backup hardware as supporting means, 52... Base portion, 53. 54 ... Mounting part, 55 ... Double-sided tape constituting the seal, 56 ... Bis as fastening means, X ... Lower floor building unit, Y ... Upper floor building unit.

Claims (12)

A waterproof structure between walls that closes a gap formed between an upper outer wall panel constituting the outer wall of a building and a lower outer wall panel disposed below the upper outer wall panel,
A waterproof structure between walls, comprising: a waterproof sheet that closes the gap, and a support unit that supports the waterproof sheet from the indoor side in the gap and suppresses the movement of the waterproof sheet to the indoor side. .   2. The waterproof structure between walls according to claim 1, wherein the support means includes a gap closing portion that closes the gap portion, and the waterproof sheet is supported by the gap closing portion.   The inter-wall waterproofing structure according to claim 2, wherein the support means includes a base portion fixed to the upper surface of the lower outer wall panel, and the gap closing portion extends upward from the outdoor side of the base portion.   The waterproof structure between walls of Claim 3 which sealed between the upper surface of the said lower side outer wall panel, and the lower surface of the said base.   The inter-wall waterproofing structure according to any one of claims 2 to 4, wherein the gap blocking portion is formed to have a downward slope that becomes the outdoor side toward the lower side.   The upper and lower outer wall panels each include an outer wall plate and a frame attached to the back side thereof, the waterproof sheet is attached between the outer wall plate of the upper outer wall panel and the frame, and the waterproof sheet is attached to the gap from the attachment site. The inter-wall waterproof structure according to any one of claims 2 to 5, wherein the inter-wall waterproof structure is disposed so as to extend along a surface of the closing portion and further to have a lower end portion positioned on a surface side of the outer wall plate of the lower outer wall panel.   The gap waterproof device according to claim 6, wherein an upper end portion of the gap closing portion is brought into contact with a frame of the upper outer wall panel.   The lower part of the waterproof sheet is disposed on the surface side of the lower outer wall panel, and the entire width direction of the lower part of the waterproof sheet is pressed against the surface side of the lower outer wall panel, thereby the lower part of the waterproof sheet together with the lower outer wall panel. The waterproof structure between walls according to any one of claims 1 to 7, further comprising pressing means for sandwiching the entire region in the width direction.   The waterproof structure between walls according to claim 8, wherein the pressing means is a decorative cover that closes the gap from the outdoor side.   The waterproof structure between walls of Claim 9 which formed the press part which extends the lower end part of the said decorative cover to a lower outer wall panel, and presses the said waterproof sheet lower part, and formed the said press means by the said press part.   The waterproof structure between walls of Claim 10 which interposed the elastic body extended in the width direction whole region of a waterproof sheet lower part between the said press part and a waterproof sheet lower part.   The waterproof structure between walls according to any one of claims 9 to 11, wherein the decorative cover is sealed between the upper and lower outer wall panels.

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