Parapet structure in an externally insulated building with ventilation layer

Abstract

To provide an exterior wall structure of a parapet portion that can reduce the complexity of the installation work of a coping and a waterproof layer.SOLUTION: This parapet structure includes an insulating layer, an exterior base material, an exterior material, and a coping. The exterior base material has a plurality of grooves arranged opposite the insulating layer and is placed outside the insulating layer so that the portions between the grooves are in contact with the insulating layer. The exterior material is placed outside the exterior base material so as to be in contact with the same. The coping has a horizontal portion placed above the insulating layer, the exterior base material, and the exterior material, and a descending piece extending downward from the end of the horizontal portion and spaced apart from the exterior material. The upper surface of the insulating layer is located below the upper surface of the exterior base material, and an insulating member formed of an insulating material that is denser and has greater compressive strength and / or bending strength than the insulating layer is placed in contact with at least a portion of the upper surface of the insulating layer.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a parapet structure in an externally insulated building with a ventilation layer, and more specifically to a parapet structure in which an insulating member made of high-density insulating material is placed on top of the insulating layer of the exterior wall, and a coping is placed on top of that. [Background technology]

[0002] Externally insulated reinforced concrete buildings are rated as high-performance energy-saving buildings for the following reasons: the outside of the concrete frame is covered with an insulating layer, which prevents cracks caused by thermal stress from sunlight; the concrete frame does not come into contact with air, which prevents neutralization of the concrete and prevents corrosion of the reinforcing steel bars, improving the durability of the building; and the temperature environment inside the building can be maintained and condensation can be prevented, which prevents the growth of mold and dust mites and is also good for health.

[0003] The four main external insulation methods used for such externally insulated buildings are the dry adhesion method, the wet adhesion method, the ventilation layer method, and the double wall method (Non-Patent Document 1). The dry adhesion method is a method in which an insulating composite panel, which integrates an exterior base material and an insulating layer, is stretched on the exterior wall (frame). The wet adhesion method is a method in which an insulating layer is stretched on the exterior wall (frame) and a thin layer of plaster is applied to the insulating layer. The ventilation layer method is a method in which an insulating layer is stretched on the exterior wall (frame) and an exterior base material or exterior material is placed on the outside, leaving a space. The space between the insulating layer and the exterior base material or exterior material becomes the ventilation layer. The double wall method is a method in which an insulating layer is stretched on the frame and an exterior wall made of thick bricks, concrete blocks, concrete panels, etc. is placed on the outside, leaving a space. The space between the insulating layer and the exterior wall becomes the ventilation layer.

[0004] Among these construction methods, the ventilation layer construction method (3) is said to be particularly excellent as a construction method capable of preventing internal condensation in exterior wall structures. In the ventilation layer construction method, a ventilation layer is provided between the insulation layer and the exterior base material or exterior material, so that water vapor (humidity) from inside the room is discharged to the outside through the ventilation layer, and the impact on the room of temperature rise due to solar heat on the exterior base material or exterior material can be suppressed. The applicant of the present application has proposed the structure described in Patent Document 1 as an externally insulated exterior wall structure to be used with the ventilation layer construction method, and this structure can also be used in the parapet portion of a building.

[0005] FIG. 9 is an enlarged vertical cross-sectional view of a main part of the structure described in Patent Document 1. This structure includes an exterior base material and a coping board that covers the upper surface of the exterior material. The coping board is supported by multiple support members arranged in the width direction between the exterior base material and the exterior base material. The exterior base material has multiple grooves extending in the height direction in the width direction, with thick-walled portions arranged between the grooves and thin-walled portions arranged in the thickness direction of the grooves. In other words, the exterior base material has a structure in which thick-walled portions, grooves, and thin-walled portions are arranged alternately in the width direction. The multiple grooves in the exterior base material serve as passages (ventilation layers) for ascending airflow, and the ascending airflow is discharged to the outdoors through a space provided between the exterior base material and the coping board.

[0006] In this structure, the coping and support members are fixed to the thick-walled portions of the exterior base material with fasteners such as screws. However, as described above, the exterior base material has thick-walled portions, grooves, and thin-walled portions arranged alternately, so the task of positioning the screws in the thick-walled portions when the exterior base material is covered by the coping is complicated, and there is a risk that the screws will be misaligned from the thick-walled portions during the screw fastening process, causing damage to the exterior base material.

[0007] Furthermore, in the structure described in Patent Document 1, multiple support members are spaced apart across the width of the building (a direction parallel to the ground along the exterior wall). This makes it difficult to align the outdoor end of the waterproofing layer in areas without support members, resulting in problems with the workability of waterproofing construction. Furthermore, in this structure, the waterproofing layer is pressure-bonded to a conventional insulation layer with low strength, so depending on the adhesive used for bonding, the insulation layer may melt, leading to peeling of the waterproofing layer. [Prior art documents] [Patent documents]

[0008] [Patent Document 1] Patent No. 7174995 [Non-patent literature]

[0009] [Non-Patent Document 1] Hokkaido External Insulation Construction Association, "External Insulation Construction Handbook," 2003, pp. 30-39 Summary of the Invention [Problem to be solved by the invention]

[0010] In view of the above problems, the present invention aims to provide an exterior wall structure for a parapet portion that can reduce the complexity of the installation work for a coping and a waterproof layer. [Means for solving the problem]

[0011] The present invention provides a parapet structure for an externally insulated building with a ventilation layer. The parapet structure includes an insulating layer, an exterior base material, an exterior material, and a coping. The exterior base material has a plurality of grooves arranged opposite the insulating layer, and is arranged outside the insulating layer so that the portions between the grooves are in contact with the insulating layer. An exterior material is arranged outside the exterior base material so as to be in contact with it. The coping has a horizontal section arranged above the insulating layer, the exterior base material, and the exterior material, and a descending piece extending downward from the end of the horizontal section and spaced apart from the exterior material. The upper surface of the insulating layer is located below the upper surface of the exterior base material, and an insulating member made of an insulating material with a higher density and greater compressive strength and / or bending strength than the insulating layer is arranged in contact with at least a portion of the upper surface of the insulating layer. Because the insulating member is made of an insulating material with a higher density and greater compressive strength and / or bending strength, the coping can be fixed to the insulating member with a fastener inserted through the coping and into the insulating member. The insulating member is preferably formed from high density bead polystyrene foam.

[0012] In one embodiment, the parapet structure includes a support member that supports the horizontal portion and is arranged between the exterior base material and the coping board to form a space that communicates with the multiple grooves and intervals. The support member is arranged to be in contact with the insulating member. In this parapet structure, a concrete balustrade wall is preferably provided on the side of the insulating layer opposite the exterior base material, in contact with the insulating layer and the insulating member. The upper surface of the concrete balustrade wall is preferably located below the upper surface of the insulating member, and a waterproof layer is preferably provided on the upper surface of the concrete balustrade wall, the edge of which is in contact with the insulating member. In another embodiment, the upper surface of the insulating member opposite the support member may be formed at a lower position than the upper surface on the support member side, and a waterproof layer may be provided on the lowered upper surface.

[0013] In another embodiment, the parapet structure includes a support member for supporting the horizontal portion, which is arranged between the exterior base material and the coping board to form a space communicating with the plurality of grooves and intervals. The support member is arranged so as not to contact the insulating member. In this parapet structure, a concrete balustrade wall is preferably provided on the side of the insulating layer opposite the exterior base material, which is in contact with the insulating layer and the insulating member. The upper surface of the concrete balustrade wall is preferably located at the same height as the upper surface of the insulating member, and a waterproof layer, the ends of which are in contact with the support member, is preferably provided on the upper surfaces of the concrete balustrade wall and the insulating member. In another embodiment, the lower part of the insulating member is preferably embedded in the upper part of the insulating layer. In another embodiment, the insulating member is preferably provided with a non-combustible board on the surface facing the exterior base material, the non-combustible board having a length in the height direction that protrudes from the upper and lower surfaces of the insulating member.

[0014] In another embodiment, the parapet structure further includes a concrete parapet wall on the opposite side of the insulation layer from the exterior base material, the parapet wall being in contact with the insulation layer and the insulation member. The upper surfaces of the exterior base material and the insulation member are located at the same height. The upper surface of the concrete parapet wall is located below the upper surface of the insulation member, and a waterproof layer is preferably provided on the upper surface of the concrete parapet wall, the end of which is in contact with the insulation member. This parapet structure includes a sealing member disposed between the coping and the exterior base material, which closes the upper ends of the multiple grooves, and an air outlet disposed a predetermined distance below the upper surface of the exterior base material, which allows air to escape from the multiple grooves. A ventilation member is preferably disposed inside the air outlet. The ventilation member prevents rainwater from entering from outside and allows air to escape from the multiple grooves to the outside. [Effects of the Invention]

[0015] According to the present invention, an insulating member made of a high-density insulating material with high screw pull-out resistance is placed on the top of the parapet, and the coping can be fixed to the insulating member, which reduces the complexity of the coping installation work. Furthermore, according to the present invention, the insulating member functions as a ruler for the end of the waterproof layer, which also reduces the complexity of the waterproof layer installation work. [Brief explanation of the drawings]

[0016] [Figure 1] 1A and 1B show the top floor of a building equipped with an exterior wall having a parapet according to one embodiment of the present invention, where (A) is an elevation view, (B) is a longitudinal cross-sectional view of the exterior wall, and (C) is a longitudinal cross-sectional view of the exterior wall around the horizontal joint. [Figure 2] 1 shows the structure of an exterior wall of a building equipped with a parapet according to one embodiment of the present invention, where (A) is a cross-sectional view of a portion of the exterior wall, (B) is a cross-sectional view of a portion of the exterior base material, and (C) is a cross-sectional view of a vertical joint and its surrounding area. [Figure 3] 1A and 1B show a parapet according to one embodiment of the present invention, in which FIG. 1A is a longitudinal cross-sectional view and FIG. 1B is an enlarged longitudinal cross-sectional view of the upper part of the parapet. [Figure 4] Shows a fascia used in a parapet according to one embodiment of the present invention, where (A) is a perspective view of a portion, (B) is a perspective view of a joint member placed at the connection between adjacent fascia bodies, and (C) is a perspective view of a support member placed in the space below the fascia. [Figure 5] 1A and 1B show a parapet according to another embodiment of the present invention, in which (A) is an enlarged vertical cross-sectional view of the upper part of the parapet, and (B) is a perspective view of a heat-insulating member to which a non-combustible board is attached. [Figure 6] 1A and 1B show a parapet according to another embodiment of the present invention, in which (A) is a longitudinal cross-sectional view and (B) is an enlarged longitudinal cross-sectional view. [Figure 7] 1A and 1B show a parapet according to another embodiment of the present invention, in which (A) is a longitudinal cross-sectional view and (B) is an enlarged longitudinal cross-sectional view. [Figure 8] 8A and 8B show the exterior wall structure of the horizontal joint portion used in the parapet of FIG. 7, where (A) is an enlarged vertical cross-sectional view of the horizontal joint portion, and (B) is a perspective view of a ventilation member disposed in the horizontal joint. [Figure 9] FIG. 1 is an enlarged vertical cross-sectional view of a main part of the structure of a conventional externally insulated building. DETAILED DESCRIPTION OF THE INVENTION

[0017] (Outline of exterior wall structure) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows the top floor of an air-permeable, externally insulated building 1, which has an exterior wall with a parapet 121 according to one embodiment of the present invention. FIG. 1(A) is an elevation view of the top floor with the parapet 121, FIG. 1(B) is a longitudinal cross-sectional view of the exterior wall, and FIG. 1(C) is a longitudinal cross-sectional view of the exterior wall around a horizontal joint 52. FIG. 2 shows the structure of the exterior wall of the building with the parapet 121, with FIG. 2(A) being a cross-sectional view of a portion of the exterior wall, FIG. 2(B) being a cross-sectional view of a portion of the exterior base material 21, and FIG. 2(C) being a cross-sectional view of a vertical joint 53 and its surroundings. The building in FIG. 1 has a parapet 121 installed, but instead of the parapet 121, parapets 122 to 124, which will be described later, can be installed at the position of the parapet 121 shown in FIG. 1. Hereinafter, the direction parallel to the ground along the outer surface of the exterior material 41 is referred to as the width direction, the direction perpendicular to the width direction along the outer surface of the exterior material 41 is referred to as the height direction, and the direction perpendicular to both the width and height directions is referred to as the thickness direction. The left side of FIG. 1(B) may be referred to as the outdoor side, outside, or front, and the right side of FIG. 1(B) may be referred to as the indoor side, inside, or rear.

[0018] The exterior wall has, as its basic structure, a concrete exterior wall 31 and a heat-insulating composite panel 2 in contact with the outside of the concrete exterior wall 31. The heat-insulating composite panel 2 is arranged so that its heat-insulating layer 22 is in contact with the concrete exterior wall 31. A parapet 121 is provided above the top floor, and the heat-insulating composite panel 2 is erected at a height from the horizontal joint 52 on the underside of the top floor to the upper end of the parapet 121. The structure of the parapet 121 will be described later.

[0019] For the exterior wall, a heat insulating composite panel 2 having substantially the same configuration as that disclosed in Patent Document 1 can be used. The heat insulating composite panel 2 has a heat insulating layer 22, an exterior base material 21 in contact with the outside of the heat insulating layer 22, and an exterior material 41 in contact with the outside of the exterior base material 21. The heat insulating layer 22 can be formed by arranging the required number of heat insulating materials, each having a thickness of 75 mm, a width of 500 mm, and a height of 2700 mm, in the height and width directions. The heat insulating layer 22 is not limited to any particular material, but may have a density of 30 kg / m3 and a compressive strength of 16 N / cm. 2, bending strength 32N / cm 2 The material used is bead-method polystyrene foam (JIS A9521) with a thermal conductivity of 0.034 W / m·K or less.

[0020] The exterior base material 21 has multiple grooves 213 extending in the height direction, with thick-walled sections 212 arranged between the grooves 213 and thin-walled sections 211 arranged in the thickness direction of the grooves 213. That is, the exterior base material 21 has a structure in which thick-walled sections 212, grooves 213, and thin-walled sections 211 are alternately arranged in the width direction. The thick-walled sections 212 are in contact with the insulating layer 22. The multiple grooves 213 have a depth of 13 mm in the thickness direction and an opening width of 30 mm, for example. The exterior base material 21 is formed by arranging the required number of extruded cement boards, each having a size of 26 mm thick, 490 mm wide, and 2700 mm high, in the height and width directions. The exterior material 41 is not limited to, but is typically made of, exterior tile, stone, painted finish, etc.

[0021] Horizontal joints 52 are provided between exterior base materials 21 and exterior materials 41 that are adjacent in the height direction, and vertical joints 53 are provided between exterior base materials 21 and exterior materials 41 that are adjacent in the width direction. It is preferable that ventilation backers 523 are arranged in the horizontal joints 52 so that the grooves 213 of each of the exterior base materials 21 that are adjacent in the height direction communicate with each other. The multiple grooves 213 that communicate from the bottom to the top of the exterior base material 21 form a compartment ventilation layer 7 through which air flow 70 passes. It is preferable that backers 533 and 534 are provided in the vertical joints 53. It is preferable that the horizontal joints 52 and the vertical joints 53 are filled with sealants 521 and 531 and 532, respectively.

[0022] (First embodiment) Figure 3 shows a parapet 121 according to one embodiment of the present invention, where Figure 3(A) is a vertical cross-sectional view of the parapet 121 and Figure 3(B) is an enlarged vertical cross-sectional view of a portion of the upper part of the parapet 121. The parapet 121 in Figure 3 is a parapet having a concrete handrail wall 33 extending upward from the concrete floor 32 of the top floor, and is equipped with an insulating member 23 arranged on an insulating layer 22 and a coping 6 arranged on the top.

[0023] The parapet 121 has an insulating layer 22 on the outside of the concrete parapet wall 33 that continues from the concrete exterior wall 31, and further outside that, has an exterior base material 21 and an exterior material 41. That is, the parapet 121 has a concrete parapet wall that contacts the insulating layer 22 on the side opposite the exterior base material 21 of the insulating layer 22. The insulating layer 22, the exterior base material 21, and the exterior material 41 make up the insulating composite panel 2. A general-purpose insulating material 42 is arranged on the inside of the concrete parapet wall 33. The upper end of the insulating layer 22 has a notch 221 on the side facing the concrete parapet wall 33, and the notch 221 is filled with the same concrete material 34 as the concrete parapet wall 33.

[0024] The upper surface of the insulating layer 22 is located below the upper surface of the exterior base material 21, and an insulating member 23 having the same thickness as the upper end portion of the insulating layer 22 is placed on the upper surface of the insulating layer 22. In addition, it is preferable to place a waterproof tape or airtight tape (not shown) between the insulating member 23 and the insulating layer 22, which has the effect of suppressing the inflow of air and moisture.

[0025] For example, a high density beaded polystyrene foam (Blagelb Insulation Panel MultiPro EPS) manufactured by Blaugelb can be used as the insulating material (also referred to as high density insulating material in this specification) forming the insulating member 23. This insulating material has a density of 150 kg / m 3 , compressive strength 149N / cm 2 , bending strength 259N / cm 2 Its physical properties include a screw pull-out value of 1200 N (for a screw with a diameter of 7.5 mm and a length of 42 mm) and a thermal conductivity of 0.0403 W / m·k.

[0026] The heat insulating member 23 can also be formed using the following materials in addition to those mentioned above. Achilles Foam Wood ·Density 60.4kg / m 3 Compression strength 59N / cm 2 Bending strength 116.9N / cm2 Thermal conductivity: 0.038W / m·k Extruded Polystyrene Foam ·Density 470kg / m 3 Bending strength: 2200N / cm 2 Thermal conductivity: 0.070W / m·k Calcium carbonate foam ·Density 70kg / m 3 Compression strength 20N / cm 2 Bending strength 50N / cm 2 Thermal conductivity: 0.037W / m·k

[0027] By using these insulating materials having the above-mentioned density and compressive and / or bending strength as the insulating member 23, the coping 6 can be fixed to the insulating member 23 using fasteners 652 such as screws, as described below. The insulating member 23 can have a thickness of 40 mm and a height of 30 mm, for example, but is not limited to these dimensions. In FIG. 3, the lower surface of the insulating member 23 is located midway up the height of the notch 221 in the insulating layer 22. However, for example, the insulating member 23 may be positioned up to the height of the notch 221 in the insulating layer 22 from the viewpoint of improving the joint stability with the insulating layer 22 and reducing the pressure of rainwater infiltration. The width of the insulating member 23 varies depending on its position and is the same as the width of the insulating layer 22. The insulating member 23 is preferably adhered to the upper surface of the insulating layer 22 and the thick portion 212 of the exterior base material 21.

[0028] The concrete balustrade wall 33, more specifically the concrete material 34 filled in the notch 221, contacts the inside of the insulation member 23. The top surface of the concrete balustrade wall 33 is located below the top surface of the insulation member 23, and a waterproof layer 51 is laid on the top surface of the concrete balustrade wall 33 at the same height as the top surface of the insulation member 23. The waterproof layer 51 is laid with a thickness corresponding to the difference between the top surfaces of the concrete balustrade wall 33 and the insulation member 23, and the edge of the waterproof layer 51 contacts the inside surface of the insulation member 23. Therefore, the insulation member 23 also serves as a ruler for laying the waterproof layer 51. The waterproof layer 51 is preferably laid so as to cover from the top surface of the concrete balustrade wall 33 to the inside surface of the insulation member 23.

[0029] The parapet 121 includes a coping 6. The coping 6 is arranged so as to contact at least a portion of the upper surface of the waterproof layer 51, contact the upper surface of the heat insulating member 23, and cover the upper surfaces of the exterior base material 21 and the exterior material 41. Fig. 4 is a perspective view of the coping 6, with Fig. 4(A) being a perspective view of a portion of the coping 6, Fig. 4(B) being a perspective view of a joint member 62 arranged at the connection portion of adjacent coping bodies 61, and Fig. 4(C) being a perspective view of a support member 63 arranged in the space below the coping 6. The coping shown in Fig. 4 is the same component as the coping described in Patent Document 1.

[0030] The capping board 6 is composed of multiple capping board bodies 61 arranged in succession across the width. As shown in Figures 3 and 4, each capping board body 61 contacts at least a portion of the upper surface of the waterproofing layer 51 and has a horizontal portion 611 extending horizontally above the insulation layer 22, insulation member 23, exterior base material 21, and exterior material 41. It also has a vertical piece 612 extending downward from the front edge of the horizontal portion 611, with a gap 71 between it and the exterior material. The lower edge of the vertical piece 612 preferably has a diagonal piece 613 formed obliquely outward. Each capping board body 61 may, for example, have a width of 2000 mm, a thickness of 140 mm, and a height of 55 mm. Each capping board body 61 can be made of, for example, steel, aluminum, or stainless steel. Steel is preferable from the standpoint of fire resistance, and aluminum or stainless steel is preferable from the standpoint of corrosion resistance, but these are not limited to these materials.

[0031] Preferably, the head board main body 61 further has a protrusion 614 at a portion where a fastener 651 for fastening the head board main body 61 is disposed. By providing the protrusion 614 and filling the space below it with a sealant (not shown), it is possible to prevent rainwater from seeping in through the portion where the fastener 651 is inserted. As described above, the insulation layer 22 has a notch 221 formed in a portion of its upper end, which is filled with the same concrete material 34 as the concrete handrail wall 33, and the fastener 651 is preferably fixed to this portion of the concrete material 34. By fixing the fastener 651 to the concrete material 34 via the protrusion 614, the elasticity of the protrusion 614 can suppress vibration of the head board main body 61, even if the fastener 651 is inserted through the waterproof layer 51, which is difficult to ensure a uniform thickness.

[0032] A portion of the underside of the horizontal portion 611 of the coping board 6 contacts the upper surface of the insulating member 23, which is provided adjacent to the insulating layer 22. As described above, the insulating member 23 is formed of a high-density insulating material with high compressive and / or bending strength, resulting in high resistance to screw pullout. Therefore, in addition to the fastener 651, the coping board 6 is preferably secured using a fastener 652 that penetrates the coping board 6 and is inserted into the insulating member 23. By securing the coping board 6 to the insulating member 23, which has high resistance to screw pullout, the complexity and potential for damage, as in the conventional structure where the coping board 6 is secured to the thick portion 212 of the exterior base material 21, can be reduced, while increasing strength in strong winds. It is preferable to sandwich a rubber gasket 653 or the like for waterproofing between the upper surface of the coping board 6 and the heads of the fasteners 651 and 652.

[0033] Between adjacent capping bodies 61, a joint member 62 shown in Figure 4(B) is preferably placed across the ends of the two capping bodies 61. By placing the joint member 62 below the joint portion of adjacent capping bodies 61, rainwater is prevented from seeping in through the joint portion of adjacent capping bodies 61, and even if it does seep in, the joint member 62 can receive it and drain it to the roof floor. The joint member 62 preferably has the same shape as the capping body 61, and can be, for example, 50 mm long in the width direction.

[0034] A support member 63 is disposed below the horizontal portion 611 of the coping board 6. The support member 63 provides a space between the horizontal portion 611 of the coping board 6 and the upper surface of the exterior base material 21, and can support the horizontal portion 611. The support member 63 forms a space that connects the air outlets at the upper ends of the multiple grooves 213 with the gap 71 provided between the exterior material 41 and the down-drop piece 612, allowing the air flow 70 passing through the multiple grooves 213 to be discharged outdoors. A ceiling 54 is preferably disposed at the upper end of the exterior material 41, below and outside the support member 63. The ceiling 54 preferably has an inclined surface from the lower end of the support member 63 to the outer surface of the exterior material 41 so as not to create air resistance for the air flow 70 being discharged outdoors.

[0035] As shown in FIG. 4(C), the support member 63 has a horizontal piece 631 and two descending pieces 632 extending downward from both sides of the horizontal piece 631. The upper surface of the horizontal piece 631 contacts the lower surface of the horizontal section 611 or the joint member 62. One of the descending pieces 632 is positioned so as to contact the outer surface of the insulating member 23 (FIG. 3). Therefore, the insulating member 23 helps to determine the position of the support member 63. The outer surface of the other descending piece 632 is positioned approximately on the same plane as the outer surface of the exterior base material 21 (FIG. 3). For example, the horizontal piece 631 may have a width of 70 mm, a thickness of 28 mm, and a descending piece height of 10 mm. The support member 63 can be made of, for example, steel, aluminum, stainless steel, etc. From the standpoint of fire resistance, steel is preferable, and aluminum or stainless steel is preferable from the viewpoint of corrosion resistance, but the material is not limited to these.

[0036] The support member 63 can be fixed by adhering the falling piece 632 to the outside of the heat insulating member 23, for example, using double-sided tape. The support member 63 can also be fixed by adhering the upper surface of the horizontal piece 631 to the underside of the joint member 62 or the head board main body 61, for example, using double-sided tape. Furthermore, the support member 63 may be used upside down, and the underside of the horizontal piece 631 may be adhered to the upper surface of the thick portion 13 of the exterior base material 21, for example, using double-sided tape. The support member 63 is preferably placed at the connection portion where two head board main bodies 61 are adjacent and at the center portion in the width direction of the head board main body 61, but is not limited to these locations.

[0037] (Second embodiment) Figure 5 shows a parapet 122 according to another embodiment of the present invention, and Figure 5(A) is an enlarged vertical cross-sectional view of the upper part of the parapet 122. Figure 5(B) is a perspective view showing an embodiment in which a non-combustible board 272 is provided on the heat insulating member 232 shown in Figure 5(A). Similar to the parapet 121 shown in Figure 3, the parapet 122 in Figure 5 is a parapet having a concrete handrail wall 33 extending upward from the concrete floor 32 of the top floor, and is equipped with the heat insulating member 232 placed on the heat insulating layer 22 and a coping 6 placed on the top.

[0038] Parapet 122 is similar to parapet 121 in that it has an insulating layer 22 on the outside of concrete balustrade wall 33, and further outside that, exterior base material 21 and exterior material 41, and an insulating member 232 is placed on top of the insulating layer 22, and the insulating member 232 used is the same as the insulating member 23 of parapet 121. However, in parapet 122, no notch is provided at the upper end of the insulating layer 22, and the inner surface of the insulating layer 22 protrudes inward (to the right in the figure) beyond the inner surface of the insulating member 232, and the protruding upper surface of the insulating layer 22 is filled with the same concrete material 34 as the concrete balustrade wall 33. In parapet 122, the upper surface of the concrete balustrade wall 33 is located at the same height as the upper surface of the insulating member 232.

[0039] In the parapet 122, a notch is provided in a part of the insulation layer 22 on the exterior base material 21 side, and a part of the lower part of the insulation member 232 is embedded in the notch. By arranging the insulation member 232 on the insulation layer 22 with the lower part of the insulation member 232 embedded in the upper part of the insulation layer 22 in this way, it is possible to prevent the moist air flow 70 flowing through the compartment ventilation layer 7 from penetrating into the concrete handrail wall 33.

[0040] A waterproof layer 51 is laid on the upper surfaces of the concrete balustrade wall 33 and the heat insulating member 232. The end of the waterproof layer 51 is in contact with the downward-hanging piece 632 on the inside of the support member 63, and therefore the support member 63 also serves as a ruler for laying out the waterproof layer 51.

[0041] The parapet 122 includes a coping 6, which is disposed so as to contact at least a portion of the upper surface of the waterproof layer 51 and cover the upper surfaces of the exterior base material 21 and the exterior material 41. The coping 6 is a component similar to the parapet 121 and the coping described in Patent Document 1. Unlike the parapet 121, the parapet 122 in FIG. 5 is fixed only by a fastener 651 used at the position of the protrusion 614, but this is not limited thereto, and the coping 6 can also be fixed at the same position as the parapet 121 using a fastener 652. The coping 6 can be fixed to the insulating member 232, which has high resistance to screw pull-out, thereby further increasing strength in strong winds.

[0042] Here, the insulating member 232 can also be in the form of a non-combustible insulating member 27. The non-combustible insulating member 27 has a metal non-combustible plate 272 attached to the side of the exterior base material 21, protruding vertically from the top and bottom surfaces of the insulating member 271. The non-combustible plate 272 is not limited to metal, as long as it is non-combustible. The insulating member 271 used in the non-combustible insulating member 27 is preferably made of fire-resistant, non-combustible calcium carbonate foam material. Even if flames penetrate through the gap 71 between the exterior material 41 and the down-drop piece 612 in the event of a fire, the non-combustible insulating member 27 reduces the possibility of the underlying insulating layer 22 burning and suppresses the rocket stove phenomenon caused by high heat rise. Furthermore, the portion of the non-combustible plate 272 protruding upward from the top surface of the insulating member 271 serves as a ruler for the waterproof layer 51 and also functions to prevent the waterproof layer 51 from burning due to flames from the gap 71 in the event of a fire. Furthermore, the portion of the non-combustible board 272 that protrudes downward from the underside of the heat insulating member 271 guides rainwater that seeps in through the gap 71 downward. The method of fitting the upper and lower protruding portions of the non-combustible board 272 may be determined appropriately taking into consideration the ease of installation, ease of member processing, environmental conditions, cost, etc. For example, the downward protruding portion of the non-combustible board 272 may be fitted into a recess provided in the outer surface of the heat insulating layer 22, or into a recess provided in the inner surface of the exterior base material 21.

[0043] (Third embodiment) FIG. 6 shows a parapet 123 according to yet another embodiment of the present invention. FIG. 6(A) is a longitudinal cross-sectional view of the parapet 122, and FIG. 6(B) is an enlarged longitudinal cross-sectional view of the parapet 123. This parapet 123 can be used as a parapet structure with a lower height than the parapets described above. For example, the height of the parapet 123 from the concrete floor 32 to the top surface of the coping 6 is expected to be 250 mm to 300 mm. Therefore, unlike the parapets 121 and 122, a parapet can be constructed without a concrete balustrade wall, making it inexpensive and free of thermal bridges. The parapet 123 has an insulating member 231 on the insulating layer 22 and a coping 6 placed at the top.

[0044] In this embodiment, the upper part of the insulating composite panel 2 (insulating layer 22, exterior base material 21, and exterior material 41) protruding from below is used as a parapet 123. The upper surface of the insulating layer 22 is located lower than the upper surface of the exterior base material 21, and an insulating member 231 with the same thickness as the upper end portion of the insulating layer 22 is placed on top of the upper surface of the insulating layer 22, similar to the parapet 121. However, unlike the insulating members used in the parapets 121 and 122, the insulating member 231 has a step formed from approximately the center to the inner portion in the thickness direction. That is, the upper surface of the insulating member 231 opposite the side that contacts the support member 63 of the coping 6 is formed at a lower position than the upper surface on the support member 63 side. The height difference between the upper surface of the insulating member 231 on the support member 63 side and the lowered upper surface on the opposite side is the same as the thickness of the waterproof layer 51, and the waterproof layer 51 is laid at this step. The waterproof layer 51 is preferably laid so as to cover from the upper surface of the stepped portion of the heat insulating member 231 to the inner surface of the heat insulating layer 22 .

[0045] The heat insulating member 231 can also have a structure consisting of two parts in the thickness direction. That is, the heat insulating member 231 can have a structure consisting of a heat insulating member 231a arranged on the outer part in the thickness direction, and a heat insulating member 231b whose upper surface is lower than the upper surface of the heat insulating member 231a and arranged inside the heat insulating member 231a. Both the heat insulating member 231a and the heat insulating member 231b can be made of the same high-density heat insulating material, but this is not limited thereto, and the heat insulating member 231a and the heat insulating member 231b can also be made of different high-density heat insulating materials.

[0046] The parapet 123 can use the same coping board 6 as the parapets 121 and 122. The coping board 6 is preferably fixed by a fastener 651 used at the position of the protrusion 614 and a fastener 652 used further outward. The fastener 651 penetrates the coping board 6 and the waterproof layer 51 and is inserted into the heat insulating member 231 (231b). The fastener 652 penetrates the coping board 6 and is inserted into the heat insulating member 231 (231a).

[0047] (Fourth embodiment) FIG. 7 shows a parapet 124 according to yet another embodiment of the present invention. FIG. 7(A) is a longitudinal cross-sectional view of the parapet 124, and FIG. 7(B) is an enlarged longitudinal cross-sectional view of the parapet 124. The parapet 124 in FIG. 7 has a concrete balustrade wall 33 installed above the concrete floor 32 of the top floor, and its basic configuration is similar to the parapet 121 shown in FIG. 3. The parapet 124 differs from the parapet 121 in that, in the parapet 124, the multiple grooves 213 in the exterior base material 21 are closed at their upper ends, and the multiple grooves 213 are not connected to the gap 71 formed by the coping 6 and the exterior material 41. The parapet 124 also differs in that horizontal joints 52 are provided a predetermined distance below the top surface of the exterior base material 21, and the multiple grooves 213 are connected to the outdoors via the horizontal joints 52. The following describes the configuration that differs from the parapet 121.

[0048] In the parapet 124, the coping board 6 is similar to the parapet 121 in that it is in contact with at least a portion of the upper surface of the waterproof layer 51, in contact with the upper surface of the insulating member 23, and is arranged so as to cover above the upper surfaces of the exterior base material 21 and the exterior material 41. However, in the parapet 124, the upper surfaces of the exterior base material 21 and the insulating member 23 are at the same height, and there is no space between the lower surface of the coping board main body 61 and the upper surface of the exterior base material 21 as in the parapet 121, and no support member 63 is arranged. In the parapet 124, a sealing member 241 is arranged between the lower surface of the coping board main body 61 and the upper surface of the exterior base material 21. It is also preferable that a sealing member 242 is arranged between the lower surface of the coping board main body 61 and the upper surface of the insulating member 23. By using a structure including sealing member 241 and preferably sealing member 242, the air outlets at the upper ends of the multiple grooves 213 in the parapet 124 are blocked, preventing rainwater from entering the multiple grooves 213 through the gaps 71 and suppressing rain from getting on the upper edge of the building, thereby preventing the exterior material 41 from becoming soiled.

[0049] The sealing members 241, 242 are preferably, but not limited to, sealing tape made of open-cell soft urethane foam. For example, "Ilmod" available from ABC Shokai Co., Ltd. can be used as this sealing tape. Because the sealing tape is moisture-permeable and rain-resistant, even if water vapor penetrates the groove 213, the water vapor is expelled from the sealing tape to the outdoors, preventing condensation from forming inside the groove 213. Furthermore, because the sealing tape has the ability to expand over time, outside air does not penetrate the groove 213 through the gap 71. The groove 213 then becomes a sealed air layer 74, improving the insulating effect.

[0050] Meanwhile, horizontal joints 52 are provided a predetermined distance below the top surface of the exterior base material 21, for example, between the exterior base material 21 and exterior material 41 of the exterior wall of the top floor and the exterior base material 21 and exterior material 41 of the rooftop portion, and airflow 70 rising inside multiple grooves 213 on the exterior wall of the room located below horizontal joint 52. Because the multiple grooves 213 are closed at their upper ends, airflow 70 needs to be discharged outdoors. In this embodiment, horizontal joints 52 are used to discharge airflow 70.

[0051] FIG. 8 shows the exterior wall of the horizontal joint 52 used in the parapet 124, with FIG. 8(A) being an enlarged vertical cross-sectional view of the horizontal joint 52, and FIG. 8(B) being a perspective view of a ventilation member 73 placed in the horizontal joint 52. In this embodiment, the sealant and ventilation backer shown in FIG. 1(C) are not placed in the horizontal joint 52, which is provided a predetermined distance below the top surface of the exterior base material 21. The multiple grooves 213 communicate with the outdoors via the horizontal joint 52. The ventilation member 73 is placed inside this horizontal joint 52.

[0052] The ventilation member 73 can discharge the airflow 70 in the multiple grooves 213 to the outdoors without allowing rainwater to seep in from the outdoors. As shown in FIG. 8(B), the ventilation member 73 has a substantially pentagonal cross section and includes an upper surface 731 and a lower surface 732 that is narrower than the upper surface 731, has a front edge flush with the edge of the upper surface 731, and is parallel to the upper surface 731. The width of the upper surface 731 (the length in the thickness direction of the exterior wall) is preferably set to be equal to the sum of the thickness of the exterior material 41 and the thickness of the thick portion 212 of the exterior base material 21. The width of the lower surface 732 is preferably set to be equal to the sum of the thickness of the exterior material 41 and the thickness of the thin portion 211 of the exterior base material 21. In other words, the difference between the rear edge of the upper surface 731 and the rear edge of the lower surface 732 is preferably equal to the thickness of the multiple grooves 213. A plurality of small passages 73a extending in the thickness direction of the outer wall (i.e., the left-right direction in FIG. 8(A)) are arranged side by side between the upper surface 731 and the lower surface 732. Between the front edge of the upper surface 731 and the front edge of the lower surface 732 is a front surface 733 where the openings (air outlets) of the plurality of small passages 73a are arranged side by side.

[0053] The rear of the ventilation member 73 has a rear surface 734 that hangs down a short distance from the rear edge of the upper surface 731, and an inclined surface 735 between the rear edge of the lower surface 732 and the lower edge of the rear surface 734. Openings (air inlets) of multiple small passages 70a are lined up on the inclined surface 735. Note that while the ventilation member 73 has the rear surface 734, this is not limited thereto, and the ventilation member 73 may have an inclined surface 735 between the rear edge of the upper surface 731 and the rear edge of the lower surface 732, but may have no rear surface 734, i.e., an inverted trapezoidal shape. The length of the ventilation member 73 (the length in the width direction of the outer wall) is preferably equal to the width of the exterior material 41.

[0054] The ventilation member 73 is arranged within the horizontal joint 52 so that the front edge of the upper surface 731, the front edge of the lower surface 732, and the front surface 733 are located flush with the surface of the exterior material 41, and the rear surface 734 is in contact with the outer surface of the insulation layer 22. The ventilation member 73 can be fixed to the exterior base material 21 using general-purpose double-sided tape or adhesive. By arranging the ventilation member 73 within the horizontal joint 52, the air flow 70 rising up the multiple grooves 213 flows into the multiple small passages 73a from openings (inlets) lined up on the inclined surface 735 of the ventilation member 73, and is discharged to the outdoors from openings (outlets) lined up on the front surface 733. [Explanation of symbols]

[0055] 1. Externally insulated buildings 121, 122, 123, 124 Parapets 2. Insulated composite panels 21 Exterior base material 211 Thin-walled section 212 Thick wall part 213 grooves 22 Insulation layer 221 Notch 23, 231, 231a, 231b, 232 Heat insulating members 27 Non-combustible heat insulating materials 271 Heat insulating materials 272 Non-combustible board 241, 242 Sealing tape 3 skeleton 31 Concrete exterior wall 32 Concrete floor 33 Concrete handrail wall 34 Concrete materials 4. Exterior 41 Exterior materials 42 Insulation 5 Waterproof 51 Waterproof layer 52 Horizontal joint 521 Ceiling 522 backers 523 Ventilated Backer 53 Vertical joint 531, 532 Ceiling 533, 534 Backer 54 Ceiling 6 Kasagi 61 Cap body 611 Horizontal plate 612 Falling section 613 Diagonal piece 614 Protrusion 62 Joint material 63 Support member 631 horizontal piece 632 Falling piece 651, 652 Fixtures 653 Rubber packing 7-compartment ventilation layer 70 Airflow 71 Air outlet 73 Ventilation components 731 Top surface 732 Bottom surface 733 Front 734 Rear 735 Slope 74 Sealed Air Layer

Claims

1. A parapet structure in a ventilation layer type external insulation building, A thermal insulation layer; an exterior base material having a plurality of grooves arranged opposite the thermal insulation layer, and a portion between the plurality of grooves contacting the thermal insulation layer; an exterior material in contact with the exterior base material; a coping board having a horizontal portion disposed above the heat insulating layer, the exterior base material, and the exterior material, and a falling piece extending downward from an edge of the horizontal portion and provided with a gap between it and the exterior material; Equipped with The upper surface of the heat insulating layer is located below the upper surface of the exterior base material, An insulating member formed of an insulating material having a higher density and a higher compressive strength and / or bending strength than the insulating layer is arranged in contact with at least a part of the upper surface of the insulating layer. Parapet structure.

2. The capping board is fixed to the heat insulating member by a fastener that penetrates the capping board and is inserted into the heat insulating member. The parapet structure according to claim 1.

3. The heat insulating member is formed from high-density bead polystyrene foam. The parapet structure according to claim 1.

4. a support member for supporting the horizontal portion, the support member being provided between the exterior base material and the coping so as to form a space communicating with the plurality of grooves and the intervals; The support member is arranged to be in contact with the heat insulating member. The parapet structure according to claim 1.

5. a concrete handrail wall in contact with the heat insulating layer and the heat insulating member on the opposite side of the heat insulating layer from the exterior base material; The upper surface of the concrete handrail wall is located at a position lower than the upper surface of the heat insulating member, A waterproof layer is provided on the upper surface of the concrete handrail wall, the end of which is in contact with the heat insulating member. The parapet structure according to claim 4.

6. The heat insulating member has an upper surface on the side opposite to the support member that is formed at a lower position than the upper surface on the support member side, and has a waterproof layer on the lowered upper surface. The parapet structure according to claim 4.

7. a support member for supporting the horizontal portion, the support member being provided between the exterior base material and the coping so as to form a space communicating with the plurality of grooves and the intervals; The support member is arranged so as not to come into contact with the heat insulating member. The parapet structure according to claim 1.

8. a concrete handrail wall in contact with the heat insulating layer and the heat insulating member on the opposite side of the heat insulating layer from the exterior base material; The upper surface of the concrete handrail wall is located at the same height as the upper surface of the heat insulating member, A waterproof layer is provided on the upper surfaces of the concrete handrail wall and the heat insulating member, and the end portion of the waterproof layer is in contact with the support member. The parapet structure according to claim 7.

9. The lower part of the heat insulating member is embedded in the heat insulating layer. The parapet structure according to claim 7.

10. The heat insulating member is provided with a non-combustible plate on the surface facing the exterior base material, the non-combustible plate having a length in the height direction protruding from the upper surface and the lower surface of the heat insulating member. The parapet structure according to claim 7.

11. Further provided is a concrete handrail wall that contacts the heat insulating layer and the heat insulating member on the opposite side of the heat insulating layer from the exterior base material, The upper surface of the concrete balustrade wall is located below the upper surface of the heat insulating member, A waterproof layer is provided on the upper surface of the concrete handrail wall, the end of which is in contact with the heat insulating member. The parapet structure according to claim 1.

12. a sealing member disposed between the coping board, the heat insulating member, and the exterior base material, the sealing member closing the air outlets at the upper ends of the plurality of grooves; an air outlet provided a predetermined distance below the upper surface of the exterior base material, for discharging air from within the plurality of grooves; The parapet structure of claim 11, comprising:

13. A ventilation member is arranged inside the air outlet, which is provided a predetermined distance below the upper surface of the exterior base material, and which can prevent rainwater from entering from outside and allow the air in the multiple grooves to flow outside. The parapet structure according to claim 12.

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