JP4906003B2 - Exterior wall structure of reinforced concrete exterior heat insulation building - Google Patents

Description

  The present invention relates to an outer wall structure of a reinforced concrete external heat insulating building and belongs to the technical field of architecture.

As an outer wall structure of a reinforced concrete external heat insulating building, stretching with a dry-contact type breathable heat insulating composite panel has already been proposed and implemented in Conventional Example 1 shown in FIG.
Conventional Example 1 (FIG. 7) was cited as a prior art in Patent Document 1 proposed by the applicant of the present application, and an extruded cement board provided with a group of grooves for ventilation on the inner surface was used as a foamed plastic insulation. Using a breathable heat-insulating composite panel that has been layered together with the layer as an outer formwork frame for the outer wall concrete, the concrete outer wall is integrally covered, and the horizontal joint of the panel's upper and lower joints is used as a closed joint from the waist drainer to the headboard. Until, the outer surface of the heat insulating layer is ventilated by the groove group for ventilation.

  FIG. 8 cited as Conventional Example 2 is disclosed in Patent Document 2, and as shown in FIG. 8 (A), a heat insulating panel and a refractory load-bearing face material are interposed via a spacer. A breathable outer heat insulation panel with air flow paths (breathing layers) between the spacers is placed on the concrete outer wall surface with concrete anchors placed in the air flow path portions between the spacers using a scraping frame method. As shown in FIG. 8 (B), the horizontal joint gap between the upper and lower sides of each panel is provided with a water drainage provided with a mounting piece from the gap between the upper and lower panels arranged for mounting the water drainage. It is arranged by fitting and fixing the mounting piece into the mounting groove on the inner surface of the load bearing surface material, and the air flow from the outside flows from the vent hole of the drainage tool into the gap of the port function between the upper and lower panels, and from the gap Open joint on the side joint that guarantees inflow into the air flow path in the panel It is Into type Insulation breathable outer wall structure.

JP 2008-2159 A JP 2002-322745 A

  In the closed joint type breathable outer heat insulating outer wall of the conventional joint 1 (FIG. 7), the molded cement board is inevitably thick because the groove for ventilation is formed in the molded cement board. Since the panel becomes heavy, the workability of the conveyance and formwork is poor, the workability of the separator insertion hole, anchor bolt insertion hole, etc. to the composite panel is poor, and the extruded cement board is wide. In this case, warping occurs, resulting in a narrow-width product, the number of covering panels per predetermined outer wall area is increased, the workability is poor, and the parallel joining vertical joints of the outer walls are increased, which is disadvantageous in finishing.

  In addition, since the extruded cement board that bears the required rigidity of the composite panel is equipped with a vent groove, the extruded cement board between the upper and lower composite panels does not collide during construction when it is attached to the concrete outer wall. In order to prevent breakage and to prevent mutual breakage of cement boards during an earthquake in a completed building, it is necessary to form and maintain a horizontal joint between the cement boards at the joint of the upper and lower panels. Construction that guarantees the vertical communication pattern of the ventilation groove between the upper and lower cement plates at the joint, that is, the joint joint, is a construction developed by the applicant of the present application by adopting a special honeycomb ventilation backer with a small cross-sectional shape. It is possible only by technology, and the ventilation construction of the upper and lower joints of each panel is a complicated and precise work, and is a difficult work with low productivity.

  Also, in the highly confidential outer wall structure that seals the horizontal joint spacing, there is a pressure difference between the outer surface and the inner surface of the extruded cement board (exterior base material) (high outdoors and low inside the ventilation layer) When it rains, there is a fear that rainwater may be drawn into the ventilation layer, and the negative pressure action (force to leave the building) due to wind pressure is applied to 100% exterior base material (extruded cement board). In the outer wall structure of the conventional example 1, when a heavy member such as a tile is attached as an exterior material, it is limited to a 5-story building due to the risk of peeling off the exterior, and is not applicable to high-rise buildings. Is possible.

In the construction of the breathable outer heat insulating outer wall of Conventional Example 2 (FIG. 8), the separator and the concrete anchor are disposed in the air flow path along the spacer, so there is a problem of displacement of the discarded frame, The tool is an open joint non-seal type, but in the horizontal joint gap between the upper and lower panels necessary for the water drainage arrangement, the thermal insulation panel has a gap for inflow of external air between the upper and lower sides. A thermal bridge action occurs in the gap between the heat insulation panels of the panel.
In addition, the positive pressure load from the outside and the negative pressure load in the ventilation layer cause the peeling piece stress to peel and damage the thin concave portion of the face material. There is also a fear.
In addition, rainwater that travels along the outer wall rises from the contact portion between the drainage plate and the refractory load-bearing surface material by capillary tension, blows into the air flow path, and enters the concrete frame from the exposed concrete surface behind the drainage tool. There is also the danger of leaking into the room from improper concrete placement such as soaking and bean board.

  The present invention provides a breathable outer heat insulating outer wall that solves or improves the problems of Conventional Example 1 (FIG. 7) and Conventional Example 2 (FIG. 8) all at once, and allows ventilation to be reduced. Adopting heat-insulating composite panels, with horizontal joints as open joints, equalizing the pressure difference between the outside and inside of the breathable heat-insulating composite panels covering the concrete outer wall, wind resistance, and excellent breathability Reasonably provide an insulated outer wall.

The outer wall structure of the present invention, for example, as shown in FIG. 1, a outer wall structure of reinforced concrete Insulation building coated with dry contact type breathable insulation composite panels 1, breathable insulation composite panel 1, the equal width In the vertical beam 2B group that vertically penetrates the foamed plastic-based heat insulating layer 2C and the molded thin rigid plate exterior base material 2A , the vertical beam 2B and the exterior base material are disposed at both ends 2L and 2R. and 2A flush, der and a heat insulating layer 2C and the outer base member 2A, and integrated layer wears while maintaining a level difference d1 for joining missing phase, which between each vertical bar 2B and the vent layer G Ri, in passing temper insulation composite panel 1 mutual vertical connecting portion, between the exterior base member 2A between the upper panel 1 and the lower panel 1 is opened as a horizontal joint dx for ventilation, of the outer wall covering panel layer, the lower end, the upper end The middle horizontal joint dx is opened for ventilation.

In this case, the foamed plastic heat insulating layer 2C is preferably a foamed plastic heat insulating plate of JISA9511 such as extruded polystyrene foam, beaded polystyrene foam, rigid urethane foam, etc., and typically an extruded polystyrene foam plate having a thickness of 75 mm. It is.
Further, the exterior base material 2A only needs to withstand a concrete type frame and satisfy the strength, wind pressure resistance, impact resistance, and frost damage resistance of the outer wall as the exterior base material. A phenol resin plate and a fly ash phenol resin plate are preferable, and typically a fiber-mixed fly ash phenol resin plate having a thickness of 13 mm.

Further, the vertical beam 2B preferably has higher impact resistance and bending strength, better dimensional stability, and lower linear expansion coefficient and thermal conductivity than the exterior base material 2A, but the exterior base material 2A is sufficient. In the case of having physical properties, the same material as the exterior base material 2A can be used.
Then, the integrated layering of the heat insulating layer 2C and the exterior base material 2A through the vertical beam 2B may be integrated by sandwiching the plate-like vertical beam 2B, but typically, in order to ensure the integrated strength, The vertical beam 2B having a width of 50 mm and a thickness of 20 mm is inserted into the shallow (standard: 5 mm) fitting groove 2G of the heat insulating layer 2C, and the bolt insertion hole hb and the separator insertion hole hs are arranged at the vertical beam 2B. Make sure to layer firmly so that it is on top.

Further, the ventilation layer G has a function of releasing indoor moisture (water vapor) penetrating into the heat insulating layer 2C and a function of suppressing the temperature rise due to the outside air of the exterior base material 2A by cooling air. The thickness of the air-permeable layer G must ensure draft air flow (ascending air flow: 0.01 m / s) with the minimum necessary temperature difference ventilation, and has the minimum dew condensation prevention function and exterior substrate. In order to ensure the overheating suppressing function of the material 2A, the thickness T3 of the ventilation layer G is typically secured to 15 mm.

  Moreover, the open form of the horizontal joint dx formed in the upper and lower connecting portions of the composite panel 1 is a limit value that prevents intrusion of rainwater and is not closed by a water film (concrete water film limit value: 9.1 mm for the horizontal joint). As long as the vertical joint is 2 mm) or more, it is sufficient to guarantee the inflow of air. Typically, as shown in FIG. 5 (A), in the state where the exterior material 3 is attached to the outer surface of the exterior base material 2A, The horizontal joint interval d6 (standard: 12 mm) between the outer packaging materials 3 is secured, and the lower end 3d of the upper outer packaging material 3 is lower than the lower end Ad of the upper outer packaging base material 2A by a rain level difference da (standard: 6 mm).

  Therefore, in the outer wall structure of the present invention, the horizontal joint dx is opened to the outside as an open joint type (open joint), and the lower end of the ventilation layer G of the covering panel layer formed by tensioning the composite panel 1 group and Since the upper end is opened to the outside air, the outer wall covering layer has an outer wall structure with a gap between the upper end, the intermediate horizontal joint and the lower end, and the ventilation layer G, and the outer (front) and inner (venting layers) of the outer wall covering layer. )), The stress load due to the pressure difference between the inner and outer surfaces of the exterior base material 2A can be reduced, and the exterior base material 2A can be prevented from falling off by reducing the peeling action and has durability. It will increase and can be applied to high-rise buildings.

  The upper and lower exterior base materials 2A are opened while maintaining a horizontal joint interval d6 (standard: 12 mm), a gap is provided between the upper and lower sides of the exterior base material 2A, and the composite panel 1 on each floor is integrated with the concrete frame. Therefore, each panel 1 behaves integrally with the wind pressure of the higher floors and the horizontal force at the time of the earthquake, and the interlayer deformation angle (value obtained by dividing the horizontal relative displacement difference between the floors by the floor height) increases. However, the composite panel can be prevented from falling off with the support brackets for the concrete frame, and even if it is under vertical stress load, it is handled by the lateral joint spacing between the exterior base materials 2A and the flexibility of the heat insulation layer. It becomes a breathable outer heat insulating outer wall in which the panel 1 is prevented from falling off.

Further, in the outer wall structure of the present invention, the breathable heat insulating composite panel 1 is a vertical beam 2B group that vertically penetrates the heat insulating layer 2C having the same width and the exterior base material 2A as shown in FIG. two side 2L, the 2R, and a vertical bar 2B and the outer base member 2A flush, and in that the heat insulating layer 2C and the outer base member 2A, and integrated layer wears while maintaining a level difference d1 for joining missing phase Is also an essential requirement.
In this case, the phase gap step d1 may be 10 mm. In a typical panel, as shown in FIG. 2 (B), five vertical rails 2B having a width (a1) of 50 mm are arranged on both outer sides. A ventilation layer G having a width (a3) of 152.5 mm and a ventilation layer G having a width (a2) on both sides of the center of 177.5 mm are formed, and the side edges of the vertical rails 2B on both sides are formed on the exterior base material 2A. The outer base material 2A is fixed flush with the side edge.

  Therefore, when constructing the outer formwork of the concrete outer wall with the composite panel 1, the parallel connection of the composite panels 1 becomes a phase defect connection by the step d1 (standard: 10 mm) on both side edges, and the formwork work is easy. Moreover, the outflow of the cement liquid (noro) of the cast concrete to the outside can be suppressed, and the inflow damage due to the cement liquid of the ventilation layer G can be avoided.

The space between the vertical rails 2B becomes a large-opening ventilation layer G penetrating up and down the panel, and the obtained outer wall communicates with the ventilation layer G having a large opening at the lower end, the intermediate horizontal joint and the ventilation layer G. It is possible to level the atmospheric pressure with the outside of the outer wall, and to suppress the peeling and dropping action due to the difference in internal and external wind pressure on the exterior base material 2A.
Further, even in the case of a concrete type frame, the conventional panel drop prevention anchor group is disposed through both sides and the center of the vertical beam 2B, so that the exterior base material 2A can be firmly held without being damaged. Is possible.
In addition, since the vertical joint dy between the composite panels 1 is in a close-closed form, the exterior finish by the exterior material 3 can be simply and cleanly constructed.

  Further, in the outer wall structure of the present invention, the upper and lower abutting portions between the breathable heat insulating composite panels 1 are abutted against each other with the heat insulating layer 2C interposed between the airtight sheets 2F as shown in FIG. The inclined base 2K rising inward is disposed at the lower end of the exterior base material 2A of the composite panel 1, and the lower end 3d of the exterior material 3 attached to the surface of the exterior base material 2A is the lower end Ad of the exterior base material 2A. It is preferable to protrude further below the rain-cut step da to suppress intrusion of rainwater into the ventilation layer G from the interval between the horizontal joints dx.

  In this case, the airtight sheet 2F employs an aldebutyl airtight sheet (trade name of Alde Engineering Co., Ltd.) having a width of 25 mm and a thickness of 0.5 mm, and the heat insulating layer is formed on the front and rear upper end Ct edges of the heat insulating layer 2C of the lower composite panel 1. The airtight sheet 2F can be adhered over the entire length in the width direction of 2C, and the airtight sheet 2F maintains adhesive strength even in extreme cold, does not soften even in summer, and has good durability, water resistance, flexibility, and adhesiveness. In addition, leakage of cast concrete (cement liquid) can be prevented, and penetration of the heat insulating layer 2C from the abutting surface due to the capillary action of rainwater from the inside of the ventilation layer G can be prevented.

In addition, the inclined side 2K that rises inward at the lower end of the exterior base material 2A and the protruding step da at the lower end of the exterior material 3 are for preventing raindrops from entering the ventilation layer G of rainwater during strong winds, Typically, as shown in FIG. 5A, a lower end side having a thickness of 3 mm before and after suppressing the damage to the lower end Ad is disposed on an exterior base material 2A having a thickness T2 of 13 mm, and an inclination angle 52 is set to a thickness of 10 mm. Since the inclined side 2K is placed at a height of 13 mm at 5 ° and the protruding step da of the exterior material 3 is 6 mm, the rise of raindrops from the lower end 3d of the exterior material and the intrusion into the ventilation layer G can be suppressed. A practically sufficient draining effect can be obtained.
In this case, if the water absorption stopper 2M such as a synthetic resin emulsion sealer (JISK5663) is applied to the inclined side 2K, the durability is improved.

  Accordingly, in the process of preparing the composite panel 1, a side with a width of 3 mm exists at the lower end Ad of the exterior base material 2 </ b> A. Therefore, the panel 1 can be manufactured without causing any defects in the exterior base material 2 </ b> A. At the time of the work, the upper inclined side 2K is caused by the surface tension for the intrusion of the rainwater from the open lateral joint dx by gravity only by finishing the lower end 3d of the exterior material 3 so as to protrude downward by the rain level difference da. Rain penetration step da and inclined side 2K correspond to infiltration and joint width d6 (standard: 12 mm) corresponds to infiltration by capillary action, so that infiltration of rain water into ventilation layer G can be suppressed.

  For example, even if rainwater enters the ventilation layer G, it can flow down from the ventilation layer G, and the infiltration of rainwater into the heat insulating layer 2C abutting contact portion of the upper and lower panels by the capillary phenomenon is performed by the airtight sheet 2F. Ventilation layer G (standard thickness T3: 15 mm) is designed because it can prevent the leakage of cement liquid (NORO) into the ventilation layer G from the contact interface of the heat insulation layer 2C even when casting concrete. The outer wall structure in which the ventilation function according to the value is guaranteed and the penetration of the rainwater into the ventilation layer G is suppressed can be obtained.

Moreover, as shown in FIG. 5 (A), the upper and lower abutting portions between the breathable heat insulating composite panels 1 of the present invention have a water film suppression interval as the interval between the upper exterior material lower end 3d and the lower exterior material upper end 3t, An inclined side 2K ′ that rises inward is also preferably arranged at the upper end of the exterior base material 2A of the lower panel 1.
In this case, if the upper end (standard width: 3 mm) is left at the upper end At of the inclined side 2K ′ of the exterior base material 2A, damage to the tip during the handling process of the exterior base material 2A can be suppressed.

The water film suppression interval is an interval at which a water film is not formed, and a gap (d6) between the upper end 3t of the outer packaging material 3 and the lower end 3d of the upper outer packaging material 3, that is, the horizontal joint dx width is a water film. It may be set to 12 mm that is not less than the limit value (9.1 mm) that cannot be closed.
Further, the inclined side 2K ′ of the lower panel is typically at the same angle (52.5 °) as the inclined side 2K of the lower end of the upper panel.

Accordingly, the open horizontal joint dx of the present invention, as shown in FIG. 5 (A), has an opening width d6 of the horizontal joint dx that is an interval where a water film cannot be formed. Infiltration of water droplets into the ventilation layer G due to can be suppressed.
Further, the inclined side 2K ′ at the upper end of the exterior base material suppresses the increase in infiltration due to the kinetic energy of rainwater, and the falling water from above can be excluded outward.

  For this reason, the horizontal joint dx, against the intrusion of rainwater, also in the horizontal wind and rain, the rainwater collides with the inclined side 2K ′ at the upper end of the exterior base material and flows out of the horizontal joint dx, and the upper slope for intrusion due to gravity The side 2K is for surface tension infiltration, and the undercutting step da of the exterior base material and the upper inclined side 2K are lateral joint spacing d6 for capillary phenomenon and water film ingress, and the lower side for invasion by kinetic energy. The inclined side 2K 'counteracts, and the ventilation layer G has a small atmospheric pressure difference from the outside air. Therefore, the infiltration of rainwater due to the atmospheric pressure difference from the panel surface side of the ventilation layer G can be suppressed, and the intrusion of rainwater is suppressed. Provide the outer wall structure.

Further, as shown in FIG. 5B, the upper and lower abutting portions of the breathable heat insulating composite panel 1 according to the present invention are arranged at the upper end of the lower panel 1 at the upper end 3t of the exterior member 3 and at the upper end of the exterior base material 2A. It is preferable to dispose an inclined side in an extended form of the inclined side 2K ′ and arrange the waterproof metal fitting 17 provided with a water return 17U at the upper end from the upper end 3t of the exterior material to the inclined side 2K ′ of the exterior base material.
In this case, the waterproof metal fitting 17 can be prepared by aluminum extrusion molding including an inclined surface 17S, a rising edge 17F, and a water return 17U horizontally bent outward, and the water return 17U is air from the horizontal joint dx to the ventilation layer G. A short dimension is preferable because it causes a decrease in inflow, typically 5 mm, and is practically usable.

The waterproof metal fitting 17 may be fixed by driving a screw 17B into the vertical beam 2B at an appropriate position from the inclined surface 17S before the exterior material 3 such as a tile is attached.
Since the inclined side of the exterior material upper end 3t is an inclination aligned with the inclined side 2K ′ of the exterior base material upper end At, the layering of the exterior material 3 on the surface of the exterior base material 2A is the inclined surface 17S of the waterproof metal fitting 17. It is finished neatly by smooth insertion into the bottom surface of the.
Therefore, in the horizontal joint dx in which the long waterproof metal fittings 17 are arranged, the inclined surface 17S suppresses the intrusion due to the kinetic energy of rainwater, and the water return 17U functions to prevent the wind (airflow) from rising. This substantially prevents the rainwater blown from the horizontal joint dx from entering the ventilation layer G.
The inclined surface 17S protects the upper end inclined side 2K ′ and the outer case upper end 3t inclined side of the exterior base material 3A having the same inclination angle (52.5 °).

Further, in the outer wall structure of the present invention, as shown in FIG. 1, each of the opening areas of the lower end opening Md, the horizontal joint opening Mx and the upper end opening Mu of the outer wall is at least a breathable heat insulating composite panel 1. It is preferable that it is the same as each opening area of the ventilation layer G.
In this case, the opening area of each part is the minimum opening cross-sectional area at that part, and the opening area of the ventilation layer G typically has a thickness T3 of 15 mm as shown in FIG. 5 vertical beams 2B having a width a1 of 50 mm are included in each of the ventilation layers G, and the width of each ventilation layer between the vertical beams 2B is 152.5 mm and a2 is 177.5 mm. ² / m.

When the waterproof metal fitting 17 having the water return 17U is disposed in the horizontal joint dx, the opening of the horizontal joint opening Mx is achieved by shortening the water return 17U and increasing the distance d6 between the horizontal joints dx. What is necessary is just to respond | correspond to area maintenance, and the coping support bracket 5 should just be arrange | positioned so that it may be settled in the width | variety (50 mm) of the vertical beam 2B upper end.
Therefore, the composite panel covering layer on the outer wall has a design opening degree (opening area) in the composite panel 1 and there is no narrowing of the opening area in the air inflow / outflow path. The draft ventilation function demonstrates 100% of the set ventilation function in the composite panel 1, the atmospheric pressure in the composite panel 1 is the same as or close to the external pressure, and the suction action to the inside of the outer wall of rainwater (composite panel ventilation layer) It does not occur and approximately 100% (standard: 98%) of the peeling action stress due to wind pressure on the exterior base material 2A becomes a burden of the metal fitting that fixes the exterior base material 2A to the concrete outer wall, and suppresses the peeling fall of the exterior base material 2A. The outer wall is obtained.

Further, in the outer wall structure of the present invention, at the upper end of the outer wall, as shown in FIG. 1, the headboard bracket 5 is fixed to the upper end Bt of the vertical beam 2B so as not to interfere with the panel ventilation layer G, and the headboard 4 is vented. It is preferable to arrange so as not to interfere with the outflow of the air flow a from the layer G.
In this case, the headboard bracket 5 protrudes laterally so that the width (standard: 50 mm) falls within the width a1 (50 mm) of the upper end Bt of the vertical beam 2B, that is, from the region of the upper end surface Bt of the vertical beam 2B. What is necessary is just to fix to upper end surface Bt so that it may not exist.
Moreover, the headboard 5 should just make the ventilation layer G connect outside with the space path of the cross-sectional area more than the opening area of the panel ventilation layer G. FIG.
Accordingly, the opening Mu portion at the upper end of the outer wall is completely opened outward from the composite panel ventilation layer G, and the occurrence of a pressure difference between the outer surface (outside) and the inner surface (inside the ventilation layer G) of the composite panel 1 can be suppressed.

Further, in the outer wall structure of the present invention, as shown in FIG. 4, the lateral direction of the exterior base material 2 </ b> A for each of a plurality of vertical joints in the vertical joint dy group of the left and right abutting joint portions of the breathable heat insulating composite panel 1. It is preferable to arrange an adjustment vertical joint dz sandwiching a gasket 19 for absorbing expansion and contraction.
In this case, the gasket 19 is for absorbing the expansion of the exterior base material 2A due to solar heat, and is typically Omal YB-R (made by Iwakura Chemical Co., Ltd.) having a thickness T2 of 13 mm and a width AW of 910 mm. In the exterior base material 2A of the product name), when the solar radiation reaches 60 ° C. or more, the thermal expansion of 0.05 mm per 1 m is made. It is sufficient to absorb the maximum thermal expansion of 0.4 mm.

The gasket 19 is made of rubber with a thickness of 3 mm, manufactured by Iwaki Kasei Co., Ltd., and has a width of 12.5 mm and a depth of 17.5 mm as shown in FIG. 4B under the trade name IW-2020. And the joint width d8 is 10 mm, and it may be arranged in a compressed form on the sides of the exterior base material 2A on both sides and the sides of the exterior material 3 on both sides.
In this case, the gasket 19 is arranged in a state where pressure is applied from both sides.

  Therefore, in the vertical joints dy group, the adjustment vertical joints dz sandwiched with gaskets are arranged for every appropriate number of panels (standard: seven sheets), and the outer wall having the horizontal joints dx opened is sealed by the vertical joints dy group. In addition, the mold finish of the composite panel 1 and the exterior finish with the exterior material 3 are easy, and the thermal expansion and contraction in the lateral direction of the exterior base material 2A and the exterior material 3 is also supported by the interposition of the adjustment vertical joint dz provided with the gasket 19. The outer wall can be applied to a high-rise building with the lower end opening Md, the central horizontal joint dx, and the upper end opening Mu being suppressed from peeling off from the outer wall of the outer covering material 3 and the outer base material 2A. .

In addition, as shown in FIG. 1, the outer wall structure of the present invention has an inclined side 2K that rises inwardly at the lower end of the exterior base material 2A at the lower end of the outer wall, and insulates the inclined side 2K and the inclined side 2K. It is preferable that a water absorption stopper 2M is applied to the outer surface of the lower end of 2C, and the lower end 3d of the exterior material 3 is protruded downward from the lower end Ad of the exterior base material 2A.
In this case, the angle of the inclined side 2K is 52.5 °, the rain cut step da is 6 mm, and the water absorption stopper 2M may be applied with a synthetic resin emulsion sealer (JISK5663) or polymer cement mortar (resin mortar).

Therefore, the lower end of the outer wall structure is a release form of the ventilation layer G that does not have a drainage or the like, but rainwater that travels through the outer wall is formed between the lower end 3d of the exterior material and the lower end Ad of the exterior base material at the lowermost end of the composite panel 1. Even if the water runs out at the step da (standard: 6 mm) and rainwater is mixed with strong wind, the lower end of the exterior base material 2A exhibits a complete draining effect at an angle of the inclined side 2K (standard: 52.5 °).
And the water absorption stopper 2M prevents water absorption from the inclined side 2K of the exterior base material 2A at the open lower end and the exposed lower end outer surface of the heat insulating layer 2C, thereby ensuring durability.

  In the outer wall structure of the present invention, the lateral joint dx is opened to communicate with the ventilation layer G inside the panel coating layer, and the ventilation layer G is opened at both the upper end and the lower end of the composite panel coating layer. Is provided with a gap penetrating the ventilation layer G for each panel, and the pressure difference between the outside of the coating layer, that is, the exterior of the exterior base material 2A and the exterior material 3, and the interior of the coating layer, that is, the interior of the ventilation layer G is approximately. The negative pressure applied to the exterior base material 2A and the exterior material 3 can be reduced by maintaining the same pressure, and most of the peeling action stress on the exterior base material 2A (standard: 98%) is borne by the support bracket of the composite panel 1 Thus, peeling off of the exterior base material 2A and the exterior material 3 can be suppressed.

And each composite panel 1 which comprises an outer wall coating layer has opened the horizontal joint space | interval (space | interval d6) between the upper and lower exterior base materials 2A, and is supporting the composite panel 1 of each floor with a support metal fitting (falling prevention anchor). Since the panels are integrated with the concrete frame, each panel will behave integrally with the concrete frame even with high-level wind pressure and horizontal stress during an earthquake. Due to the strength of the anchor, the composite panel can be prevented from falling off, and even under stress in the vertical direction, the presence of the open horizontal joint dx interval between the exterior base materials 2A and the displacement followability of the heat insulating layer 2C can prevent Breakage of the covering layer, that is, the strength composite panel layer, can be suppressed, and the outer wall structure of the present invention provides an outer heat insulating covering outer wall that can be applied to a high-rise building.
When constructing the outer formwork of the concrete outer wall with the composite panel 1, the parallel connection of the composite panels 1 becomes a phase-break connection by the step d1 (standard: 10 mm) on both side edges, making the formwork easy. Moreover, the outflow of the cement liquid (noro) of the cast concrete to the outside can be suppressed, and the inflow damage due to the cement liquid of the ventilation layer G can be avoided .
Further, even in the case of a concrete type frame, the conventional panel drop prevention anchor group is disposed through both sides and the center of the vertical beam 2B, so that the panel 1 can be firmly held without fear of damage to the exterior base material 2A. Is possible .
In addition, since the vertical joint dy between the composite panels 1 is in a close-closed form, the exterior finish by the exterior material 3 can be simply and cleanly constructed .

It is a partial notch vertical side view of this invention outer wall structure. It is explanatory drawing of the composite panel used for this invention, Comprising: (A) is a partially cutaway perspective view, (B) is a cross-sectional view, (C) is the elements on larger scale of (B) figure. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cut vertical side view of a composite panel used in the present invention, wherein (A) is a top floor composite panel, (B) is an intermediate floor composite panel, and (C) is a first floor composite panel. FIG. (A) is a partially cutaway cross-sectional view of the outer wall structure of the present invention, and (B) is a partially enlarged view of (A). (A) is a vertical side view of the horizontal joint portion of the outer wall of the present invention, and (B) is a modified example of (A). It is a modified example figure of this invention, Comprising: (A) is a partially notched longitudinal side view of an outer wall structure, (B) is a perspective view of the waterproof metal fitting to be used. It is explanatory drawing of the prior art example 1, Comprising: (A) is a vertical side view of an outer wall upper end, (B) is a vertical side view of a horizontal joint part, (C) is a vertical side view of an outer wall lower end. It is explanatory drawing of the prior art example 2, Comprising: (A) is a perspective view of a heat insulation panel, (B) is a vertical side view of a horizontal joint part.

[Composite panel 1 (FIGS. 2 and 3)]
The composite panel (breathable heat insulating composite panel) 1 is a panel that forms a formwork as an outer formwork of a concrete outer wall when constructing a concrete outer wall of a reinforced concrete building, and integrally coats the outer surface of the concrete outer wall into an outer heat insulating form by placing concrete. There are top panel composite panel (top panel), intermediate floor composite panel (intermediate panel), and first floor composite panel (bottom panel), each of which has three types: top panel, intermediate panel, and bottom panel. The panels of Fig. 2 have the same cross-sectional structure and different shapes at the upper and lower ends. Fig. 2 (A) is a perspective view of a standard panel (intermediate panel), Fig. 2 (B) is a cross-sectional view of the panel, Fig. 3 FIG. 3A is a vertical sectional view of the upper panel, FIG. 3B is a vertical sectional view of the intermediate panel, and FIG. 3C is a vertical sectional view of the lower panel.

2B, the cross-sectional structure of the composite panel 1 includes a heat insulating layer 2C having a width CW of 910 mm and a thickness T4 of 75 mm, and an exterior base material 2A having a width AW of 910 mm and a thickness T2 of 13 mm. The five vertical rails 2B having a width a1 of 50 mm and a thickness TB of 20 mm are integrated by being spaced apart in the vertical direction, and the space between the vertical rails 2B is used as a ventilation layer G.
As shown in FIG. 2 (B), the vertical bars 2B at both ends in the width direction are flush with the side edges of the exterior base material 2A and one side edge with respect to the heat insulating layer 2C. 1L enters the phase gap step d1 (standard: 10 mm), and the other side edge 1R protrudes the phase gap step d1 (10 mm). The interval between the vertical rails 2B is the distance between the side edges, that is, the air-permeable layer G at the both edges. The vertical beam 2B has a depth dB of 5 mm and a width of the vertical beam 2B, which is notched on the surface 2S of the heat insulating layer 2C. In a shallow fitting groove 2G having a width a1, the thickness is 5 mm.

Then, layering integration of the heat insulating layer 2C, the vertical beam 2B, and the exterior base material 2A is performed by partially embedding and integrating the back surface of the vertical beam 2B into the fitting groove 2G on the surface of the heat insulating layer. The surface and the back surface of the exterior base material 2A are bonded and integrated, and a conventional screw n1 is nailed from the surface of the exterior base material 2A, and a glue nail combined layer is attached.
As shown in FIG. 2B, the resulting composite panel 1 has an exterior base material 2A having a thickness T2 of 13 mm and a vertical beam 2B having a thickness TB of 20 mm which are flush with each other at both side edges and has a thickness T4. The ventilation layer G with a depth (thickness) T3 of 15 mm has a width on the inner side of both ends of the heat insulation layer 2C of 75 mm, d1 (10 mm) entering at one end 1L and d1 (10 mm) protruding at the other end 1R. Four arrangements of 152.5 mm (a3) and a width of 177.5 mm (a2) on both sides of the center.

The composite panel 1 is made of an extruded polystyrene plate (JISA9511) having a thickness T4 of 75 mm, a width CW of 910 mm, and a height Ch of 2700 mm (standard height) as the heat insulating layer 2C, and the exterior base material 2A. Iwakura Chemical Industry Co., Ltd., which is lightweight (13 kg / m ² ) and high strength (flexural strength: 100 kgf / cm ² ) with a thickness T2 of 13 mm, a width AW of 910 mm, and a height Ah of 2690 mm (standard height) Omar YB-R (trade name) made of phenolic resin plate (double-sided glass fiber mixed, volcanic gravel sand ash, phenolic resin plate) is adopted as the vertical rail 2B, the same material as the exterior base material 2A (phenolic resin plate) A plate material having a thickness TB of 20 mm, a width a1 of 50 mm, and a length of 2700 mm was employed.

[Top composite panel (Fig. 3 (A))]
As for the composite panel 1 applied to the top floor, it is necessary to arrange a cap to prevent the inflow of rainwater into the panel 1, and as shown in FIG. 3A, parapet concrete enters inside the upper end Ct of the heat insulating layer 2C. A notch CP (standard: width TP is 37.5 mm, height hp is 50 mm) for the entire length in the width direction is arranged, and at the upper end surface, the heat insulating layer 2C, the vertical beam 2B and the exterior base material 2A are flush with each other, At the lower end surface, only the vertical beam 2B protrudes downward from the phase deficit step d4 (standard: 7 mm), and the exterior base material 2A leaves a small side (standard: 3 mm) for reinforcing the lower end Ad over the entire length in the width direction. A 52.5 ° inclined side 2K is cut and formed, and a synthetic resin emulsion sealer (JISK5663) is applied to the inclined side 2K as a water absorption stopper 2M.

[Intermediate composite panel (Fig. 3B)]
As shown in FIG. 3B, the intermediate composite panel 1 has a vertical beam 2B group having the same length as the height Ch (2700 mm) of the heat insulation layer 2C with respect to the heat insulation layer 2C, and the vertical beam upper end Bt is the heat insulation layer upper end Ct. Accordingly, the phase gap connection step d4 (standard: 7 mm) is entered below, and the lower end Bd is projected below the phase gap connection step d4 from the lower end Cd of the heat insulating layer.
In addition, the exterior base material 2A is cut at the upper end At to the vertical beam upper end Bt and the inclined side 2K ′ inclined at 52.5 ° downward and outward leaving a small side (standard: 3 mm) for reinforcement. At the lower end Ad, the inclined side 2K inclined by 52.5 ° is formed by cutting the inner side upward and leaving the small side (3 mm) for reinforcement in alignment with the lower end Cd of the heat insulating layer.
A water absorption stopper 2M (synthetic resin emulsion sealer) is applied to the inclined sides 2K and 2K ′.

In addition, an airtight sheet 2F with release paper having a width of 25 mm and a thickness of 0.5 mm (Aldebutyl airtight sheet (trade name) manufactured by Alde Engineering Co., Ltd.) is provided on the outer and inner edges of the upper end Ct of the heat insulating layer 2C. The heat insulation layer 2C is fixed over the entire length.
The airtight sheet 2F retains adhesive strength even in extreme cold, does not soften even in summer, has good durability, water resistance, flexibility, and adhesion, and adapts to uneven surfaces. If the air-tight sheet 2F seals the abutting contact interface of the heat insulating layer 2C of the upper and lower panels, the cement concrete liquid (noro) enters and leaks into the contact interface of the heat insulating layer 2C, and the ventilation layer G Infiltration of water from the capillaries can be prevented.

[Composite panel for the first floor (Fig. 3 (C))]
As shown in FIG. 1, the first floor composite panel 1 is opened as it is without disposing a lower drainage or the like. As shown in FIG. The upper end Ct, the vertical beam 2B upper end Bt, and the exterior base material upper end At are maintained at a level difference d4 (standard: 7 mm) and can be phase-bonded to the lower end surface of the upper panel. The upper end At of the exterior base material 2A is A 52.5 ° inclined side 2K ′ is formed, leaving a small side (standard: 3 mm) for reinforcement, and a water absorption stopper (synthetic resin emulsion sealer) is applied to the inclined side 2K ′ to form a heat insulating layer 2C. An airtight sheet 2F with release paper is secured to the front end and the rear end over the entire panel width.

  The lower end of the first floor panel 1 is flush with the lower end Ad of the exterior base material 2A and the lower end Cd of the heat insulating layer 2C, and the lower end Ad of the exterior base material 2A has a small side (standard: 3 mm) at the front end. The inclined side 2K inclined at 52.5 ° inward and upward is cut while leaving the reinforcing flat surface, and the lower end Bd of each vertical beam 2B group enters the upper end position of the exterior base material inclined side 2K. A water absorption stopper (synthetic resin emulsion sealer) is applied to the inclined side 2K at the lower end of the exterior base material and the front and bottom front edges of the lower end of the heat insulating layer 2C.

[Construction of outer wall (Figs. 1 and 4)]
As shown in FIG. 1, the concrete foundation rising portion 8 is the same quality as the thermal insulation layer 2C of the composite panel 1 and a foamed plastic thermal insulation plate 2C ′ having a thickness T4 ′ of 60 mm and the same quality as the exterior base material 2A of the composite panel 1. A base composite panel 1 ′ having a thickness T8 of 73 mm layered on a thick exterior base material 2A is used as an outer frame, and the upper end of the base composite panel 1 ′ is d2 (standard: 20 mm) from the floor slab surface Sf of the base rising portion. ) Build in the lower position.

  In addition, as shown in FIG. 2, the breathable heat insulating composite panel 1 on each floor is preliminarily provided in four steps at the vertical beam positions at both ends 2L and 2R of the width AW and the center of the vertical beam 2B at the center. In addition, 11 anchor bolt insertion holes hb are drilled in a staggered pattern in three stages at the central vertical beam 2B position, and an appropriate number of separator insertion holes hs are provided on the vertical beam 2B positions on the left and right sides from the center. Perforate well-balanced.

Next, in a conventional manner, the first-floor composite panels 1 are arranged side by side under the abutting contact between the heat insulating layers 2C in a phase-deficient connection at a level difference d1 (standard: 10 mm). Four anti-falling fittings (anchor bolts: not shown) with a long-term allowable shearing force of 290 kgf and a long-term allowable tensile force of 250 kgf are arranged per 1 m ² through the anchor bolt insertion holes hb. In the separator insertion hole hs, a holding means consisting of a conventional shaft foot separator, separator, and heat insulation cone is arranged, an outer formwork of the concrete outer wall is constructed, and concrete is cast into the outer wall concrete formwork. An outer wall covered with one layer of a breathable heat insulating composite panel is constructed on the outside of the outer wall.

On the intermediate floor, a group of intermediate composite panels, on the lower composite panel, the upper heat insulation layer upper end Ct and the upper composite panel heat insulation layer lower end Cd of the lower composite panel, the heat insulation layer upper end Ct and the heat insulation layer lower end Cd. The outer wall of the concrete is bonded by the airtight seal 2F so that the contact interface dx 'with the surface slab surface Sf is d2 (20 mm) below the floor slab surface Sf. The concrete outer wall is constructed by repeating the construction of the concrete outer wall formwork → concrete placement sequentially.
In addition, in the case of the formwork by the composite panel 1 on each floor, as shown in FIG. 4, the width d8 (standard: between the side edges of the exterior base material 2A on both sides) is arranged every 7 sheets of standard width panels (CW: 910 mm). 10 mm), and a hollow gasket made by Iwaki Kasei Co., Ltd. (product name: IW-2020) having a wall thickness of 3 mm, a width of 12.5 mm, and a depth of 17.5 mm is placed on both sides of the joint space d8. Press-fit while pressing.

In the case of the outer formwork of the concrete outer wall, the left and right connection of each composite panel 1 is a phase-joint joint at the joining step d1 at the edge of the exterior base material 2A reinforced with the stacked form of the vertical rails 2B. It was possible to carry out accurately with simple work without causing damage to the base material 2A.
Further, even in the connection work between the upper and lower floors of the composite panel 1, the protruding portion d4 (standard: 7 mm) from the lower end Cd of the heat insulating layer of the vertical beam 2B of the upper panel 1 exhibits the alignment function, and the workability is improved. Improved.

Also, the cement liquid (noro) due to the concrete pouring pressure is also because the left and right parallel connection parts of the composite panel 1 are phase-separated joints, and the upper and lower connections are firmly closed by the airtight seal 2F at the contact interface of the heat insulating layer 2C. Intrusion into the ventilation layer G and the longitudinal joint dy could be prevented.
Therefore, the vertical joint dy contact surface can be constructed in a clean state, and it is easy to finish the continuous form of the conventional resin mortar + 100 mm wide joint tape 1T and the resin mortar exterior base material 2A layer to the vertical joint dy, And we were able to carry out cleanly.

And, on the surface of the exterior base material 2A, a conventional tile is stuck as the exterior material 3, and at the upper end of the outer wall, as shown in FIG. , And the heat insulation layer upper end Ct is flush with each other, and the notch CP at the rear of the heat insulation layer upper end is filled and integrated with parapet concrete P. Therefore, as shown in FIG. Is placed on the width (50 mm) of the vertical beam 2B at the upper end of the panel, and is fixed on the vertical beam 2B and the exterior base material 2A with screws n5. The back end was fixed to the parapet cement filled on the notch CP of the heat insulating layer 2C with the screw n9, and the front and rear two-point support was firmly fixed.
The bracket 5 does not interfere with the ventilation layer G between the vertical rails 2B, and the opening area of the ventilation layer G also includes the top 4 supported by the rising piece 5P of the bracket 5 and the upper end of the panel. A sufficient open area to the outside can be provided by forming the space.

  In the obtained outer wall structure, as shown in FIG. 1, from the ventilation layer G group between the vertical beams 2B group at the lower end of the composite panel 1 for the first floor, with the help of the inclined side 2K at the lower end of the exterior base material. The air flow a flows in and rises in the ventilation layer G as a draft flow due to the temperature difference, and the air flow a is allowed to flow in and out even at the open horizontal joint dx of each floor. The air flow a is discharged to the outside without receiving the interference of the bracket 5 that has been made.

  Therefore, the outer wall structure is opposed to the wind pressure by the exterior base material 2A and the vertical beam 2B that supports the exterior base material 2A against the positive pressure in a strong wind, and the outer wall structure (composite) By reducing the airtightness of the panel 1), the wind pressure load on the exterior base material 2A is mostly due to the adhesiveness between the components of the vertical beam 2B, the fall prevention bracket (fall prevention anchor), and the composite panel 1. The outer wall structure of the present invention in which the thin rigid plate is used as the exterior base material 2A of the composite panel 1 is the outer wall in which the exterior base material 2A and the exterior material 3 are prevented from being separated and dropped. The structure is applicable to high-rise buildings as well as middle and low-rise buildings in concrete buildings.

[Others]
As shown in FIG. 6B, the rising edge 20B having a water return 20U bent at the upper end from the rear end of the inclined top plate 20T, and the lower end from the front end of the inclined top plate 20T. As shown in FIG. 6 (A), the waterproof metal fitting 20 having the falling side 20F with the inclined side 20S inclined downward is applied to the vertical beam 2B between the horizontal joints dx and the vertical beam 2B at the lower end of the first floor panel. It is also possible to arrange with screw n20.
In this case, the waterproof metal fitting 20 needs to be disposed while suppressing a decrease in the opening area of the opening Mx and the lower end opening Md of the horizontal joint dx.

  When the waterproof metal fitting 20 is provided, the negative pressure applied to the exterior base material 2A to which the exterior material 3 is attached is suppressed, and the atmospheric pressure before and after the exterior base material 2A is equalized to enter the rainwater into the outer wall panel. In the horizontal joint dx, the outer base material upper end At and the outer member upper end 3t of the lower outer wall are protected against waterproofing, and the inclined top plate 20T guides the flowing rainwater outward. Contamination due to rain water on the outer wall surface can be reduced, and even in the lower end opening Md, rain water contamination on the outer surface of the foundation rising portion 8 due to rain water flowing down the lower end of the outer wall can be suppressed without reducing the opening area.

1 Breathable thermal insulation composite panel (composite panel, panel)
1 'basic composite panel (basic panel)
1T Joint tape 2A Exterior base material 2B Vertical beam 2C Heat insulation layer 2C 'Heat insulation plate 2F Airtight sheet 2G Fitting groove 2K, 2K' Inclined sides 2L, 2R Side end 2M Water absorption stop material 3 Exterior material 4 Headboard 5 Headboard bracket (bracket)
5P Rise piece 8 Concrete foundation rise part (foundation rise part)
17, 20 Waterproof metal fitting 19 Gasket 17F, 20B Rising edge 17U, 20U Water return 17S Inclined surface 20F Falling side 20S Slope side 20T Inclined top plate CF Concrete frame CP Notch da Rain cut level dx Horizontal joint dy Longitudinal joint dz Adjusting longitudinal joint G Vent layer hb Bolt insertion hole hs Separator insertion hole Md Lower end opening (opening)
Mu Upper end opening (opening)
Mx Horizontal joint opening (opening)
n1, n5, n9, n17, n20 Thread Sf Floor slab surface

Claims (8)

It is an outer wall structure of a reinforced concrete outer heat insulating building covered with a dry-contact type breathable heat insulating composite panel (1), and the breathable heat insulating composite panel (1) is molded with a foam plastic heat insulating layer (2C) of equal width. It is a group of vertical beams (2B) vertically passing through a thin rigid plate exterior base material (2A), and at both ends (2L, 2R), the vertical beam (2B) and exterior base material. and (2A) flush, and the heat insulating layer (2C) and the outer base member and (2A), and integrated layer wears while maintaining a phase missing step for joining (d1), the vertical bar (2B) during the all SANYO was the vent layer (G), passing temper insulation composite panel (1) in the upper and lower connecting portions of the other, between the upper panel (1) and the lower panel (1) exterior base sheet between (2A) Is opened as a vent joint (dx), and the lower end, upper end, and intermediate cross joint (dx) of the outer wall covering panel layer are passed through. Open the outer wall structure to use. The upper and lower abutting portions of the breathable heat insulating composite panel (1) abut each other on the heat insulating layer (2C) with an airtight sheet (2F) interposed therebetween, and the lower end of the exterior base material (2A) of the composite panel (1) The lower edge (3d) of the exterior material (3), which has an inclined side (2K) that rises inward, and is stuck to the surface of the exterior material (2A), is the lower end (Ad) of the exterior material (2A). The outer wall structure according to claim 1, wherein the outer wall structure protrudes below the rain level difference (da) to suppress intrusion of rainwater into the ventilation layer (G) from the interval between the horizontal joints (dx). The interval between the upper exterior material lower end (3d) and the lower exterior material upper end (3t) is set as a water film suppression interval, and the upper end of the exterior base material (2A) of the lower panel (1) also rises inward. The outer wall structure according to claim 2 , wherein the side (2K ') is arranged. At the upper end of the lower panel (1), an inclined side that is an extension of the upper side (2K ′) of the upper side of the exterior base material (2A) is arranged on the upper end (3t) of the exterior material (3), and water is added to the upper end. The outer wall structure according to claim 3 , wherein the waterproof metal fitting (17) having a barb (17 U) is disposed from the upper end (3 t) of the exterior material to the inclined side (2 K ′) of the exterior base material. The opening area of the lower end opening (Md), the lateral joint opening (Mx) and the upper end opening (Mu) of the outer wall is at least the opening area of the ventilation layer (G) of the breathable heat insulating composite panel (1). The outer wall structure according to any one of claims 1 to 4 , which is the same. At the upper end of the outer wall, the headboard bracket (5) is fixed to the upper end (Bt) of the vertical beam (2B) so as not to interfere with the panel ventilation layer (G), and the headboard (4) is connected to the airflow from the ventilation layer (G). The outer wall structure according to claim 5 , which is arranged so as not to interfere with the outflow of (a). Breathable heat-insulating composite panel (1) A gasket (19) for absorbing lateral expansion and contraction of the exterior base material (2A) is sandwiched between a plurality of vertical joints in the vertical joint (dy) group of the left and right abutting joints. The outer wall structure according to any one of claims 1 to 6, wherein a worn adjustment vertical joint (dz) is disposed. At the lower end of the outer wall, an inclined side 2K that rises inward from the lower end of the exterior base material (2A) is disposed, and water is absorbed on the lower end outer surface of the heat insulating layer (2C) facing the inclined side (2K) and the inclined side (2K). grant stop material the (2M), the outer package and the bottom end (3d) (3) from the lower end of the outer base member (2A) (Ad) is projected to rain cutting step (da) below, of claims 1 to 7 The outer wall structure according to any one of claims.

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