Parapet structure in 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 a ventilated layer type external heat insulation building, and more specifically, to a parapet structure in which a heat insulation member formed of a high-density heat insulation material is disposed on a heat insulation layer of an outer wall, and a coping is disposed thereon.

Background Art

[0002] An external heat insulation building made of reinforced concrete can suppress cracks caused by thermal stress due to solar radiation because the outside of the concrete body is covered with a heat insulation layer, and can suppress the carbonation of concrete because the concrete body does not come into contact with air, thereby preventing the corrosion of reinforcing bars. The durability of the building is improved, and the temperature environment inside the building can be maintained, and the occurrence of dew condensation inside the building can be suppressed. Therefore, due to reasons such as the suppression of the generation of mold and mites and excellent health aspects, it is evaluated as an energy-saving high-performance building.

[0003] As the main external heat insulation methods used for such external heat insulation buildings, four methods can be mentioned: the dry adhesion method, the wet adhesion method, the ventilated layer method, and the double wall method (Non-Patent Document 1). The dry adhesion method is a method of stretching a heat insulation composite panel in which an exterior base material and a heat insulation layer are integrated on an outer wall (body). The wet adhesion method is a method of stretching a heat insulation layer on an outer wall (body) and applying a thin coating wall to the heat insulation layer. The ventilated layer method is a method of stretching a heat insulation layer on an outer wall (body) and disposing an exterior base material or an exterior material with a space left outside thereof. The space between the heat insulation layer and the exterior base material or the exterior material becomes a ventilated layer. The double wall method is a method of stretching a heat insulation layer on a body and disposing an outer wall such as a thick brick, a concrete block, or a concrete plate with a space left outside thereof. The space between the heat insulation layer and the outer wall becomes a ventilated layer.

[0004] Among these construction methods, as a method capable of preventing internal condensation in the outer wall structure, in particular, the ventilation layer method of (3) is said to be excellent. In the ventilation layer method, since a ventilation layer is provided between the heat insulation layer and the exterior base material or the exterior material, water vapor (moisture) from the interior is discharged to the outside through the ventilation layer, and the influence of the temperature rise due to solar heat of the exterior base material or the exterior material on the interior can be suppressed. The applicant of the present application has proposed a structure described in Patent Document 1 as an external heat insulation outer wall structure used for the ventilation layer method, and this structure can also be used for the parapet part of a building.

[0005] FIG. 9 is an enlarged longitudinal sectional view of the main part of the structure described in Patent Document 1. This structure includes a coping that covers the upper surfaces of the exterior base material and the exterior material. This coping is supported between the exterior base material by a plurality of support members arranged in the width direction. The exterior base material has a plurality of strip grooves extending in the height direction in the width direction, a thick portion is arranged between the strip grooves, and a thin portion is arranged in the thickness direction of the strip grooves. That is, the exterior base material has a structure in which thick portions, strip grooves, and thin portions are alternately arranged in the width direction. The plurality of strip grooves of the exterior base material serve as passages (ventilation layers) for the rising air flow, and the rising air flow is discharged to the outside from the space provided between the exterior base material and the coping.

[0006] In this structure, the coping and the support members are fixed to the thick portion of the exterior base material by fixtures such as screws. However, as described above, since the thick portions, strip grooves, and thin portions are alternately arranged in the exterior base material, the operation of positioning the screw in the thick portion with the exterior base material covered by the coping is complicated, and there is a risk that the position of the screw deviates from the thick portion during the screwing operation, damaging the exterior base material.

[0007] In addition, in the structure described in Patent Document 1, a plurality of support members are arranged at intervals in the width direction of the building (a direction parallel to the ground along the outer wall). Therefore, it is difficult to align the positions of the outdoor-side tips of the waterproof layer at the portions without support members, and there are problems with the workability of waterproof construction. Furthermore, in this structure, since the waterproof layer is pressure-bonded to a conventional heat-insulating layer with low strength, depending on the adhesive used for bonding, there is a risk that the heat-insulating layer will melt and lead to the peeling of the waterproof layer.

Prior Art Documents

Patent Documents

[0008]

Patent Document 1

Non-Patent Documents

[0009]

Non-Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0010] In view of the above problems, an object of the present invention is to provide an outer wall structure of a parapet part that can reduce the complexity of the installation work of the coping and the waterproof layer.

Means for Solving the Problems

[0011] The present invention provides a parapet structure in a ventilated layer type external heat insulation building. This parapet structure includes a heat insulation layer, an exterior base material, an exterior finish material, and a coping. The exterior base material has a plurality of strip grooves arranged opposite to the heat insulation layer, and is arranged outside the heat insulation layer such that the portions between the plurality of strip grooves are in contact with the heat insulation layer. An exterior finish material is arranged outside the exterior base material in contact therewith. The coping has a horizontal portion arranged above the heat insulation layer, the exterior base material, and the exterior finish material, and a vertical piece extending downward from an end of the horizontal portion and provided at an interval from the exterior finish material. The upper surface of the heat insulation layer is positioned below the upper surface of the exterior base material, and a heat insulation member formed of a heat insulating material having a higher density, compressive strength, and / or flexural strength than the heat insulation layer is arranged in contact with at least a part of the upper surface of the heat insulation layer. Since the heat insulation member is formed of a heat insulating material having a higher density, compressive strength, and / or flexural strength, the coping can be fixed to the heat insulation member by a fixture inserted through the coping and into the heat insulation member. The heat insulation member is preferably formed of high-density bead method polystyrene foam.

[0012] In one embodiment, the parapet structure includes a support member for supporting the horizontal portion provided so as to form a space communicating the plurality of strip grooves and the interval between the exterior base material and the coping. The support member is arranged in contact with the heat insulation member. In this parapet structure, it is preferable to provide a concrete handrail wall in contact with the heat insulation layer and the heat insulation member on the side opposite to the exterior base material of the heat insulation layer. The upper surface of the concrete handrail wall is positioned below the upper surface of the heat insulation member, and it is preferable to have a waterproof layer on the upper surface of the concrete handrail wall with an end in contact with the heat insulation member. In another embodiment, the upper surface of the heat insulation member on the side opposite to the support member may be formed at a position lower than the upper surface on the side of the support member, and a waterproof layer may be provided on the upper surface formed at the lower position.

[0013] In another embodiment, the parapet structure includes a support member that supports a horizontal portion and is provided between the exterior base material and the coping so as to form a space that communicates a plurality of grooves and intervals. The support member is arranged so as not to contact the heat insulating member. In this parapet structure, it is preferable to provide a concrete handrail wall that contacts the heat insulating layer and the heat insulating member on the side opposite to the exterior base material of the heat insulating layer. The upper surface of the concrete handrail wall is located at the same height as the upper surface of the heat insulating member, and it is preferable to have a waterproof layer whose end contacts the support member on the upper surfaces of the concrete handrail wall and the heat insulating member. In another embodiment, it is preferable that the lower part of the heat insulating member is embedded in the upper part of the heat insulating layer. In another embodiment, it is preferable that the heat insulating member is provided with a non-combustible plate having a length in the height direction protruding from the upper and lower surfaces of the heat insulating member on the surface on the exterior base material side.

[0014] In another embodiment, the parapet structure further includes a concrete handrail wall that contacts the heat insulating layer and the heat insulating member on the side opposite to the exterior base material of the heat insulating layer. The upper surface of the exterior base material and the upper surface of the heat insulating member are located at the same height. The upper surface of the concrete handrail wall is located below the upper surface of the heat insulating member, and it is preferable to have a waterproof layer whose end contacts the heat insulating member on the upper surface of the concrete handrail wall. In this parapet structure, there is a seal member that closes a plurality of grooves at their upper ends, which is arranged between the coping and the exterior base material, is provided at a predetermined distance below the upper surface of the exterior base material, and has an air outlet for allowing the air in the plurality of grooves to flow out. It is preferable to arrange a ventilation member inside the air outlet. The ventilation member can discharge the air in the plurality of grooves to the outside without allowing rainwater from the outside to penetrate.

Advantages of the Invention

[0015] According to the present invention, since a heat insulating member formed of a high-density heat insulating material with a large pull-out resistance of the screw can be arranged at the top of the parapet and the coping can be fixed to the heat insulating member, it is possible to reduce the complexity of the installation work of the coping. Further, according to the present invention, since the heat insulating member functions as a gauge for the end of the waterproof layer, the complexity of the installation work of the waterproof layer can also be reduced.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Mode for Carrying Out the Invention

[0017] (Outline of the Outer 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 a ventilated layer type external heat insulation building 1 having an outer wall with a parapet 121 according to an embodiment of the present invention. FIG. 1(A) is an elevation view of the top floor having the parapet 121, FIG. 1(B) is a longitudinal sectional view of the outer wall, and FIG. 1(C) is a longitudinal sectional view of the outer wall around the horizontal joint 52. FIG. 2 shows the structure of the outer wall of a building having the parapet 121. FIG. 2(A) is a cross-sectional view of a part of the outer wall, FIG. 2(B) is a cross-sectional view of a part of the exterior base material 21, and FIG. 2(C) is a cross-sectional view of the vertical joint 53 and its surroundings. In the building of FIG. 1, the parapet 121 is installed, but instead of the parapet 121, the parapets 122 to 124 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 orthogonal to the width direction along the outer surface of the exterior material 41 is referred to as the height direction, and the direction orthogonal to the width direction and the height direction is referred to as the thickness direction. Also, the left direction in FIG. 1(B) may be referred to as the outdoor side, the outer side, or the front, and the right direction in FIG. 1(B) may be referred to as the indoor side, the inner side, or the rear.

[0018] The outer wall basically includes a concrete outer wall 31 and a heat insulation composite panel 2 in contact with the outside thereof. The heat insulation composite panel 2 is arranged such that its heat insulation layer 22 is in contact with the concrete outer wall 31. A parapet 121 is provided above the top floor, and the heat insulation composite panel 2 is erected at a height from the horizontal joint 52 on the lower side of the top floor to the upper end of the parapet 121. The structure of the parapet 121 will be described later.

[0019] In the outer wall, as the heat insulation composite panel 2, for example, one having substantially the same configuration as that disclosed in Patent Document 1 can be used. The heat insulation composite panel 2 has a heat insulation layer 22, an exterior base material 21 in contact with the outside of the heat insulation layer 22, and an exterior material 41 in contact with the outside of the exterior base material 21. The heat insulation layer 22 can be formed by arranging a necessary number of one heat insulating material having a size of, for example, a thickness of 75 mm, a width of 500 mm, and a height of 2700 mm in the height direction and the width direction. The heat insulation layer 22 is not limited, but for example, a density of 30 kg / m3, a compressive strength of 16 N / cm 2, Bending strength: 32 N / cm 2 , Bead method polystyrene foam (JIS A9521) with a thermal conductivity of 0.034 W / m·K or less is adopted.

[0020] The exterior base material 21 has a plurality of strip grooves 213 extending in the height direction. A thick portion 212 is arranged between the strip grooves 213, and a thin portion 211 is arranged in the thickness direction of the strip grooves 213. That is, the exterior base material 21 has a structure in which the thick portion 212, the strip grooves 213, and the thin portion 211 are arranged alternately in the width direction. The thick portion 212 is in contact with the heat insulation layer 22. The plurality of strip grooves 213 are, for example, 13 mm deep and 30 mm wide in the thickness direction, and one extruded cement board with a size of, for example, 26 mm thick, 490 mm wide, and 2700 mm high is arranged in the required number in the height direction and width direction, whereby the exterior base material 21 is formed. The exterior material 41 is not limited, but typically exterior tiles, stone materials, painting finishes, etc. are used.

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

[0022] (First Embodiment) FIG. 3 shows a parapet 121 according to an embodiment of the present invention. FIG. 3(A) is a longitudinal sectional view of the parapet 121, and FIG. 3(B) is a partially enlarged longitudinal sectional view of the upper part of the parapet 121. The parapet 121 in FIG. 3 is a parapet having a concrete handrail wall 33 extending upward from the concrete floor 32 on the top floor, and includes a heat insulation member 23 arranged on the heat insulation layer 22 and a coping 6 arranged at the top.

[0023] The parapet 121 has a heat insulation layer 22 on the outer side of the concrete handrail wall 33 continuous from the concrete outer wall 31, and further has an exterior finish base material 21 and an exterior finish material 41 on its outer side. That is, the parapet 121 has a concrete handrail wall in contact with the heat insulation layer 22 on the side opposite to the exterior finish base material 21 of the heat insulation layer 22. The heat insulation layer 22, the exterior finish base material 21, and the exterior finish material 41 constitute the heat insulation composite panel 2. A general-purpose heat insulating material 42 is arranged inside the concrete handrail wall 33. The upper end portion of the heat insulation layer 22 has a notch 221 on the side of the concrete handrail wall 33, and the notch 221 is filled with the same concrete material 34 as the concrete handrail wall 33.

[0024] The upper surface of the heat insulation layer 22 is located below the upper surface of the exterior finish base material 21, and a heat insulating member 23 having the same thickness as the upper end portion of the heat insulation layer 22 is arranged on the upper surface of the heat insulation layer 22. Further, it is preferable that a waterproof tape or an airtight tape (not shown) having an effect of suppressing the inflow of air and moisture is arranged between the heat insulating member 23 and the heat insulation layer 22.

[0025] As the heat insulating material forming the heat insulating member 23 (which may also be referred to as a high-density heat insulating material in this specification), for example, high-density bead method polystyrene foam (blaugelb Insulation Panel MultiPro EPS) manufactured by blaugelb can be used. This heat insulating material has physical property values such as a density of 150 kg / m 3 , a compressive strength of 149 N / cm 2 , a flexural strength of 259 N / cm 2 , a screw pull-out value of 1200 N (in the case of 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] In addition to the above, the heat insulating member 23 can also be formed using, for example, the following materials. Achilles foam wood · Density 60.4 kg / m 3 · Compressive strength 59 N / cm 2 · Flexural strength 116.9 N / cm2 · Thermal conductivity: 0.038 W / m·K Extruded foam polystyrene · Density: 470 kg / m 3 · Bending strength: 2200 N / cm 2 · Thermal conductivity: 0.070 W / m·K Calcium carbonate foam material · Density: 70 kg / m 3 · Compressive strength: 20 N / cm 2 · Bending strength: 50 N / cm 2 · Thermal conductivity: 0.037 W / m·K

[0027] By using these heat insulating materials having the above-mentioned density, compressive strength and / or bending strength as the heat insulating member 23, as described later, the coping 6 can be fixed to the heat insulating member 23 by using a fixture 652 such as a screw. The heat insulating member 23 can be, for example, sized 40 mm in thickness and 30 mm in height, but is not limited thereto. In FIG. 3, the lower surface of the heat insulating member 23 is located in the middle of the height of the notch 221 of the heat insulating layer 22. For example, from the viewpoints of the bonding stability with the heat insulating layer 22 and the reduction of the pressure of rainwater intrusion, the heat insulating member 23 can also be sized up to the height of the step of the notch 221 of the heat insulating layer 22. The length of the heat insulating member 23 in the width direction varies depending on the position where it is arranged and is the same as the length of the heat insulating layer 22 in the width direction. The heat insulating member 23 is preferably adhered to the upper surface of the heat insulating layer 22 and the thick portion 212 of the exterior base material 21.

[0028] Inside the heat insulating member 23, there is contact with a concrete handrail wall 33, more specifically, a concrete material 34 filled in the notch 221. The upper surface of the concrete handrail wall 33 is located below the upper surface of the heat insulating member 23, and a waterproof layer 51 whose upper surface is located at the same height as the upper surface of the heat insulating member 23 is laid on the upper surface of the concrete handrail wall 33. The waterproof layer 51 is laid with a thickness corresponding to the difference between the upper surface of the concrete handrail wall 33 and the upper surface of the heat insulating member 23, and the end of the waterproof layer 51 is in contact with the inner surface of the heat insulating member 23. Therefore, the heat insulating member 23 also serves as a gauge for the finishing of the waterproof layer 51. The waterproof layer 51 is preferably laid so as to cover from the upper surface of the concrete handrail wall 33 to the inner surface of the heat insulating material 42.

[0029] The parapet 121 includes a coping 6. The coping 6 is in contact with at least a part of the upper surface of the waterproof layer 51, in contact with the upper surface of the heat insulating member 23, and is arranged so as to cover above the upper surfaces of the exterior finishing base material 21 and the exterior finishing material 41. FIG. 4 is a perspective view of the coping 6, FIG. 4(A) is a partial perspective view of the coping 6, FIG. 4(B) is a perspective view of a joint member 62 arranged at the connecting portion of the adjacent coping body 61, and FIG. 4(C) is 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 ridge board 6 is composed of a plurality of ridge board bodies 61 arranged continuously in the width direction. As shown in FIGS. 3 and 4, each ridge board body 61 is in contact with at least a part of the upper surface of the waterproof layer 51, and has a horizontal portion 611 that extends horizontally above the heat insulation layer 22, the heat insulation member 23, the exterior base material 21, and the exterior material 41, and a vertical piece 612 that extends downward from the front edge of the horizontal portion 611 and is provided with a space 71 from the exterior material. It is preferable that an inclined piece 613 formed obliquely outward is provided at the lower end edge of the vertical piece 612. Each of the ridge board bodies 61 can have, for example, a length of 2000 mm in the width direction, a length of 140 mm in the thickness direction, and a height of 55 mm for the vertical piece 612. Each of the ridge board bodies 61 can be made of, for example, steel, aluminum, stainless steel, etc. From the perspective of fire resistance, it is preferably made of steel, and considering corrosion resistance, it is preferably made of aluminum or stainless steel, but it is not limited thereto.

[0031] The ridge board body 61 preferably further has a protrusion 614 at a portion where a fixture 651 for fixing the ridge board body 61 is arranged. By providing the protrusion 614 and filling the space below with a sealing material (not shown), it is possible to prevent rainwater from entering from the portion where the fixture 651 is inserted. As described above, the heat insulation layer 22 is provided with a notch 221 at a part of the upper end, and the notch 221 is filled with a concrete material 34 that is the same as the material of the concrete handrail wall 33. The fixture 651 is preferably fixed to this portion of the concrete material 34. By fixing the fixture 651 to the concrete material 34 via the protrusion 614, even if the fixture 651 is inserted through the waterproof layer 51 that is difficult to ensure thickness uniformity, the vibration of the ridge board body 61 can be suppressed by the elasticity of the protrusion 614.

[0032] A part of the lower surface of the horizontal portion 611 of the coping 6 is in contact with the upper surface of the heat insulation member 23 provided in contact with the heat insulation layer 22. Since the heat insulation member 23 is formed of a high-density heat insulation material having a high density and a large compressive strength and / or bending strength as described above, the pull-out resistance of the screw is large. Therefore, in addition to the fixture 651, the coping 6 is preferably fixed using a fixture 652 that penetrates the coping 6 and is inserted into the heat insulation member 23. In this way, by being able to fix the coping 6 to the heat insulation member 23 having a large pull-out resistance of the screw, it is possible to reduce the complexity and the possibility of damage of the work such as the conventional structure fixed to the thick portion 212 of the exterior base material 21, while enhancing the strength during strong winds. It should be noted that it is preferable to sandwich a rubber packing 653 or the like for waterproofing between the upper surface of the coping 6 and the heads of the fixture 651 and the fixture 652.

[0033] Between adjacent coping bodies 61, it is preferable that the joint member 62 shown in FIG. 4(B) is arranged across the ends of the two coping bodies 61. By arranging the joint member 62 below the connection portion of the adjacent coping bodies 61, it is possible to prevent rainwater from entering from the connection portion of the adjacent coping bodies 61, and even if it enters, it can be received by the joint member 62 and discharged to the rooftop floor. The joint member 62 is preferably the same shape as the coping body 61, and for example, the length in the width direction can be 50 mm.

[0034] A support member 63 is arranged below the horizontal portion 611 of the coping 6. The support member 63 can provide a space between the horizontal portion 611 of the coping 6 and the upper surface of the exterior base material 21 and support the horizontal portion 611. By the support member 63, a space is formed that communicates the air outlet at the upper end of the plurality of strip grooves 213 and the interval 71 provided between the exterior material 41 and the vertical piece 612, and the air flow 70 passing through the plurality of strip grooves 213 can be discharged outdoors. It is preferable that a sealing 54 is arranged at the upper end of the exterior material 41 below the outside of the support member 63. The sealing 54 preferably has an inclined surface formed from the lower end of the support member 63 to the outer surface of the exterior material 41 so as not to become an air resistance to the air flow 70 discharged outdoors.

[0035] As shown in FIG. 4(C), the support member 63 has a horizontal piece 631 and two vertical pieces 632 extending downward from both sides of the horizontal piece 631, and the upper surface of the horizontal piece 631 contacts the lower surface of the horizontal portion 611 or the joint member 62. One of the vertical pieces 632 is arranged to contact the outer surface of the heat insulating member 23 (FIG. 3). Therefore, the heat insulating member 23 helps to determine the position of the support member 63. The outer surface of the other vertical piece 632 is located on substantially the same plane as the outer surface of the exterior base material 21 (FIG. 3). The support member 63 can be, for example, 70 mm in the length in the width direction, 28 mm in the length in the thickness direction, and 10 mm in the height of the vertical piece. The support member 63 can be made of, for example, steel, aluminum, stainless steel, etc. From the viewpoint of fire resistance, it is preferably made of steel, and considering corrosion resistance, it is preferably made of aluminum or stainless steel, but it is not limited thereto.

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

[0037] (Second Embodiment) FIG. 5 shows a parapet 122 according to another embodiment of the present invention. FIG. 5(A) is an enlarged longitudinal sectional view of the upper part of the parapet 122. Further, FIG. 5(B) is a perspective view showing a form in which a non-combustible plate 272 is provided on the heat insulating member 232 shown in FIG. 5(A). The parapet 122 in FIG. 5 is a parapet having a concrete handrail wall 33 extending upward from the concrete floor 32 on the top floor, similar to the parapet 121 shown in FIG. 3, and includes a heat insulating member 232 disposed on the heat insulating layer 22 and a coping 6 disposed at the top.

[0038] The parapet 122 has a heat insulating layer 22 outside the concrete handrail wall 33, and further has an exterior base material 21 and an exterior material 41 outside thereof. A heat insulating member 232 is disposed on the upper part of the heat insulating layer 22. The heat insulating member 232 used is the same as the heat insulating member 23 of the parapet 121, so the parapet 122 is similar to the parapet 121. However, in the parapet 122, no notch is provided at the upper end of the heat insulating layer 22, and the inner surface of the heat insulating layer 22 protrudes inward (rightward in the figure) from the inner surface of the heat insulating member 232. The same concrete material 34 as the concrete handrail wall 33 is filled on the protruding upper surface of the heat insulating layer 22. In the parapet 122, the upper surface of the concrete handrail wall 33 is located at the same height as the upper surface of the heat insulating member 232.

[0039] In the parapet 122, a notch is provided in a part of the heat insulating layer 22 on the side of the exterior base material 21, and a part of the lower part of the heat insulating member 232 is embedded in the notch. By disposing the heat insulating member 232 on the heat insulating layer 22 with the lower part of the heat insulating member 232 embedded in the upper part of the heat insulating layer 22 in this way, it is possible to suppress the air flow 70 containing moisture flowing through the partition ventilation layer 7 from entering up to the concrete handrail wall 33.

[0040] A waterproof layer 51 is laid on the upper surfaces of the concrete handrail wall 33 and the heat insulating member 232. The end of the waterproof layer 51 is in contact with the standing piece 632 inside the support member 63. Therefore, the support member 63 also serves as a gauge for the finishing of the waterproof layer 51.

[0041] The parapet 122 includes a coping 6, the coping 6 is in contact with at least a part of the upper surface of the waterproof layer 51, and is arranged to cover above the upper surfaces of the exterior base material 21 and the exterior material 41. The coping 6 is a component similar to the coping described in the parapet 121 and Patent Document 1. In the parapet 122 of FIG. 5, different from the parapet 121, the coping 6 is fixed only by the fixture 651 used at the position of the protrusion 614, but it is not limited thereto, and the fixture 652 can also be used to fix it at the same position as the parapet 121. By being able to fix the coping 6 to the heat insulating member 232 with a large screw extraction resistance, the strength during strong winds can be further enhanced.

[0042] Here, the heat insulating member 232 can also be in the form of a non-combustible heat insulating member 27. The non-combustible heat insulating member 27 is provided with a metal non-combustible plate 272 having a length in the height direction protruding from the upper and lower surfaces of the heat insulating member 271 on the side surface of the exterior base material 21. The non-combustible plate 272 is not limited to being made of metal as long as it has non-combustibility. As the heat insulating member 271 used for the non-combustible heat insulating member 27, it is preferable to use a calcium carbonate foam material that is fire-resistant and difficult to burn. The non-combustible heat insulating member 27 reduces the possibility of the similar burning of the lower heat insulating layer 22 even if a flame enters from the interval 71 provided between the exterior material 41 and the vertical piece 612 due to a fire, and suppresses the rocket stove phenomenon due to the rise of high heat. In addition, the portion of the non-combustible plate 272 protruding upward from the upper surface of the heat insulating member 271 has a function of suppressing the combustion of the waterproof layer 51 by the flame from the interval 71 during a fire while serving as a gauge for the finishing of the waterproof layer 51. Furthermore, the portion of the non-combustible plate 272 protruding downward from the lower surface of the heat insulating member 271 guides the rainwater entering from the interval 71 downward. Regarding the method of accommodating the upper and lower protruding portions of the non-combustible plate 272, it may be appropriately determined in consideration of workability, ease of member processing, environmental conditions, cost, etc. For example, the protruding portion of the non-combustible plate 272 downward can be accommodated in a depression provided on the outer surface of the heat insulating layer 22 or in a depression provided on the inner surface of the exterior base material 21.

[0043] (Third Embodiment) FIG. 6 shows a parapet 123 according to still another embodiment of the present invention. FIG. 6(A) is a longitudinal sectional view of the parapet 122, and FIG. 6(B) is an enlarged longitudinal sectional view of the parapet 123. This parapet 123 can be used as a structure of a lower parapet than the parapets described so far. For example, the height of the parapet 123 from the concrete floor 32 to the upper surface of the coping 6 is assumed to be 250 mm to 300 mm. Therefore, unlike the parapets 121 and 122, the parapet can be constructed without providing a concrete handrail wall, which is inexpensive and does not generate a heat bridge. The parapet 123 has a heat insulating member 231 on the heat insulating layer 22 and a coping 6 disposed at the top.

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

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

[0046] In the parapet 123, the same coping 6 as that of the parapets 121 and 122 can be used. The coping 6 is preferably fixed by a fixture 651 used at the position of the protrusion 614 and a fixture 652 used outside thereof. The fixture 651 penetrates through the coping 6 and the waterproof layer 51 and is inserted into the heat insulation member 231 (231b). Further, the fixture 652 penetrates through the coping 6 and is inserted into the heat insulation member 231 (231a).

[0047] (Fourth Embodiment) FIG. 7 shows a parapet 124 according to still another embodiment of the present invention. FIG. 7(A) is a longitudinal sectional view of the parapet 124, and FIG. 7(B) is an enlarged longitudinal sectional view of the parapet 124. The parapet 124 in FIG. 7 is a parapet having a concrete handrail wall 33 provided above the top floor concrete floor 32, and the basic configuration is similar to that of the parapet 121 shown in FIG. 3. The differences between the parapet 124 and the parapet 121 are as follows. One is that in the parapet 124, a plurality of grooves 213 of the exterior base material 21 are closed at their upper ends, and the intervals 71 formed by the plurality of grooves 213, the coping 6, and the exterior material 41 do not communicate with each other. The other is that in the parapet 124, a horizontal joint 52 is provided a predetermined distance below the upper surface of the exterior base material 21, and the plurality of grooves 213 communicate with the outdoors via the horizontal joint 52. Hereinafter, the configuration different from that of the parapet 121 will be described.

[0048] In the parapet 124, the coping 6 is similar to the parapet 121 in that it is in contact with at least a part of the upper surface of the waterproof layer 51, in contact with the upper surface of the heat insulating member 23, and 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 surface of the exterior base material 21 and the upper surface of the heat insulating member 23 are at the same height, and no space like that in the parapet 121 is provided between the lower surface of the coping main body 61 and the upper surface of the exterior base material 21, and the support member 63 is not arranged. In the parapet 124, a sealing member 241 is arranged between the lower surface of the coping main body 61 and the upper surface of the exterior base material 21. Also, it is preferable that a sealing member 242 is similarly arranged between the lower surface of the coping main body 61 and the upper surface of the heat insulating member 23. By adopting a structure having the sealing member 241 and preferably the sealing member 242, in the parapet 124, the air outlets at the upper ends of the plurality of strip grooves 213 are blocked, preventing rainwater from entering from the gap 71 into the plurality of strip grooves 213, suppressing the dripping of rainwater from the upper edge of the building, and preventing the soiling of the exterior material 41.

[0049] The sealing members 241 and 242 are not limited, but it is preferable to use a sealing tape made of continuous bubble soft urethane foam. As such a sealing tape, for example, "Irmode" available from ABC Shokai Co., Ltd. can be used. Since the sealing tape has moisture permeability and rain resistance, even when water vapor enters the strip groove 213, the water vapor is discharged outdoors from the sealing tape, and condensation does not occur inside the strip groove 213. Also, since the sealing tape has gap followability that expands over time, outside air does not enter from the gap 71 into the strip groove 213, and the strip groove 213 becomes a sealed air layer 74, improving the heat insulation effect.

[0050] On one hand, a horizontal joint 52 is provided at a predetermined distance below the upper surface of the exterior base material 21, for example, between the exterior base material 21 and the exterior material 41 of the outer wall on the top floor and the exterior base material 21 and the exterior material 41 of the rooftop portion. In the plurality of strip grooves 213 on the outer wall of the living room located below the horizontal joint 52, there is an upward air flow 70. Since the plurality of strip grooves 213 are closed at their upper ends, the air flow 70 needs to be discharged outdoors. In this embodiment, the horizontal joint 52 is utilized to discharge the air flow 70.

[0051] FIG. 8 shows the outer wall of the portion of the horizontal joint 52 used for the parapet 124. FIG. 8(A) is an enlarged longitudinal sectional view of the portion of the horizontal joint 52, and FIG. 8(B) is a perspective view of the ventilation member 73 disposed in the horizontal joint 52. In this embodiment, a sealing and ventilationbacker shown in FIG. 1(C) is not disposed in the horizontal joint 52 provided at a predetermined distance below the upper surface of the exterior base material 21. The plurality of strip grooves 213 communicate with the outdoors through the horizontal joint 52. A ventilation member 73 is disposed inside the horizontal joint 52.

[0052] The ventilation member 73 can discharge the air flow 70 in the plurality of strip grooves 213 outdoors without allowing rainwater from the outdoors to penetrate. As shown in FIG. 8(B), the ventilation member 73 has a substantially pentagonal cross section, and has an upper surface 731, a front edge that is narrower than the upper surface 731 and is flush with the edge of the upper surface 731, and a lower surface 732 parallel to the upper surface 731. The width of the upper surface 731 (the length in the thickness direction of the outer 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. That is, it is preferable that the difference between the rear edge of the upper surface 731 and the rear edge of the lower surface 732 is equal to the thickness of the plurality of strip grooves 213. Between the upper surface 731 and the lower surface 732, 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 juxtaposed. 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.

[0053] Behind the ventilation member 73, there are a rear surface 734 that hangs down by a short length 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. A plurality of openings (air inlets) of the plurality of small passages 70a are arranged on the inclined surface 735. Note that the ventilation member 73 has a rear surface 734, but is not limited thereto, and there may be an inclined surface 735 between the rear edge of the upper surface 731 and the rear edge of the lower surface 732, and the shape without the rear surface 734, that is, 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 in the horizontal joint 52 such that the front edge of the upper surface 731, the front edge of the lower surface 732, and the front surface 733 are located on the same plane as the surface of the exterior material 41, and the rear surface 734 is in contact with the outer surface of the heat insulation layer 22. The ventilation member 73 can be fixed to the exterior base material 21 using a general-purpose double-sided tape or an adhesive. By arranging the ventilation member 73 inside the horizontal joint 52, the air flow 70 rising through the plurality of strip grooves 213 flows into the plurality of small passages 73a from the openings (inlets) arranged on the inclined surface 735 of the ventilation member 73, and is discharged to the outside through the openings (outlets) arranged on the front surface 733.

Explanation of Reference Numerals

[0055] 1 Externally insulated building 121, 122, 123, 124 Parapet 2 Heat insulation composite panel 21 Exterior base material 211 Thin part 212 Thick part 213 Strip groove 22 Heat insulation layer 221 Notch 23, 231, 231a, 231b, 232 Heat insulation member 27 Non-combustible heat insulation member 271 Heat insulation member 272 Non-combustible board 241, 242 Sealing tape 3 Building body 31 Concrete exterior wall 32 Concrete floor 33 Concrete parapet wall 34 Concrete material 4 Exterior finish 41 Exterior finish material 42 Heat insulation material 5 Waterproofing 51 Waterproof layer 52 Horizontal joint 521 Sealing 522 Backer 523 Ventilated backer 53 Vertical joint 531, 532 Sealing 533, 534 Backer 54 Sealing 6 Lintel 61 Lintel body 611 Horizontal plate 612 Vertical downward part 613 Inclined piece 614 Protrusion 62 Joint member 63 Support member 631 Horizontal piece 632 Vertical downward piece 651, 652 Fasteners 653 Rubber packing 7 Partition ventilation layer 70 Airflow 71 Airflow outlet 73 Ventilation member 731 Upper surface 732 Lower surface 733 Front surface 734 Rear surface 735 Inclined surface 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 insulation member. On the upper surfaces of the concrete handrail wall and the heat insulation member, there is a waterproof layer whose end is in contact with the support member. The parapet structure according to claim 7.

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

10. On the surface of the heat insulation member on the side of the exterior base material, a non-combustible board having a length in the height direction protruding from the upper and lower surfaces of the heat insulation member is provided. The parapet structure according to claim 7.

11. On the side of the heat insulation layer opposite to the exterior base material, a concrete handrail wall in contact with the heat insulation layer and the heat insulation member is further provided. The upper surface of the concrete handrail wall is located below the upper surface of the heat insulation member. On the upper surface of the concrete handrail wall, there is a waterproof layer whose end is in contact with the heat insulation member. The parapet structure according to claim 1.

12. A seal member that closes the plurality of strip grooves at their upper ends, disposed between the coping and the heat insulation member and the exterior base material. An air outlet provided a predetermined distance below the upper surface of the exterior base material for allowing the air in the plurality of strip grooves to flow out. The parapet structure according to claim 11, comprising the above.

13. In the interior of the air outlet, a ventilation member is disposed that can prevent rainwater from outside from entering and allow the air in the plurality of strip grooves to flow out to the outside. The parapet structure according to claim 12.

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