Warehouse exterior wall structure and construction method

Abstract

To provide an exterior wall structure of a warehouse that can simplify construction while ensuring thermal insulation and fire resistance, and a method for constructing the exterior wall structure.SOLUTION: A non-combustible insulation panel 2 is placed in contact with the outdoor side ends of adjacent floor slabs 17 spaced vertically apart, and the non-combustible insulation pane 2 is joined to the respective floor slabs 17 sandwiched vertically, and then, a sprayed fireproof layer 6 is formed over the entire area of the exposed surface on the indoor side of the non-combustible thermal insulation panel 2, and a sprayed foamed resin thermal insulation layer 10 is formed over a predetermined area above and below the gap between the non-combustible thermal insulation panel 2 and an exterior steel plate 16, including the outdoor end face of the floor slab 17, along the extending direction of the outdoor end face of the floor slab 17, a connection plate 12 connected to the outdoor side end face of the floor slab 17 is blown through the sprayed foamed resin thermal insulation layer 10 and protruded to the outdoor side, and the exterior steel plate 16 is attached to the protruding tip.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an exterior wall structure of a warehouse and a method for constructing the same, and more particularly to an exterior wall structure of a warehouse that can simplify construction while ensuring thermal insulation and fire resistance, and a method for constructing the exterior wall structure. [Background technology]

[0002] Refrigerated warehouses and freezer warehouses require high insulation to maintain low temperatures inside. Various exterior wall structures for such warehouses have been proposed (see, for example, Patent Document 1). In the exterior wall structure proposed in Patent Document 1, wall panels with insulating layers are arranged between adjacent floor slabs, spaced apart from one another vertically. Vertical furring strips arranged on the outdoor side of the wall panels are connected to the floor slabs via brackets, and wall panels are attached to the indoor side ends of horizontal furring strips attached to the vertical furring strips, and exterior materials are attached to the outdoor ends.

[0003] In this way, the exterior wall structure is characterized by the fact that the wall panels are connected to indoor components such as floor slabs via brackets, vertical furring strips, and horizontal furring strips. However, in this exterior wall structure, there are parts where the wall panels and floor slabs are connected via brackets with a gap between them. In these connections, the wall panels and floor slabs are not directly joined, which is disadvantageous in terms of ensuring fire resistance. Therefore, there is room for improvement in order to improve fire resistance while still ensuring thermal insulation. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-143807 A Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the present invention is to provide an exterior wall structure for a warehouse that can be easily constructed while ensuring thermal insulation and fire resistance, and a method for constructing this exterior wall structure. [Means for solving the problem]

[0006] In order to achieve the above-mentioned object, the exterior wall structure of a warehouse of the present invention is characterized in that, in the exterior wall structure of a refrigerated warehouse equipped with non-combustible insulation panels arranged between adjacent floor slabs spaced apart from each other above and below, the non-combustible insulation panels abut against the outdoor end portions of each of the floor slabs and are joined by being sandwiched between the top and bottom, the indoor surface of the non-combustible insulation panels is covered with a sprayed non-combustible material, and an exterior material is installed on the outdoor side of the non-combustible insulation panels with a gap between them via a connecting plate protruding from the outdoor end surface of the floor slab.

[0007] The method for constructing the exterior wall structure of a warehouse of the present invention is characterized in that a non-combustible insulating panel is abutted against the outdoor ends of adjacent floor slabs spaced apart from each other vertically, the non-combustible insulating panel is joined in a state where it is sandwiched between the floor slabs from above and below, a non-combustible material is sprayed over the entire exposed surface of the indoor side of the non-combustible insulating panel to form a fire-resistant layer, and an exterior material is installed on the outdoor side of the non-combustible insulating panel with a gap between it and the non-combustible insulating panel via a connecting plate protruding from the outdoor end surface of the floor slab. Effect of the Invention

[0008] According to the present invention, the noncombustible insulation panel is joined in a state where it is in contact with the outdoor side of adjacent floor slabs spaced apart from each other vertically and sandwiched between the respective floor slabs. Therefore, an excellent fireproof structure is formed, which is partitioned by the upper and lower floor slabs and the noncombustible insulation panel. The exterior material is connected to the outdoor side of the noncombustible insulation panel via a connection plate protruding from the outdoor end face of the floor slab, leaving a gap between the noncombustible insulation panel and the outdoor side of the noncombustible insulation panel. OpenSince the non-combustible insulation panel is installed, the exterior material protects the non-combustible insulation panel without affecting the fireproof structure. A fireproof layer is formed on the indoor surface of the non-combustible insulation panel by spraying a non-combustible material, ensuring further fire resistance. To build this exterior wall structure, it is sufficient to install the non-combustible insulation panel, spray the non-combustible material, and attach the exterior material via a connecting plate, simplifying the construction. [Brief description of the drawings]

[0009] [Figure 1] 1 is an explanatory diagram illustrating the exterior wall structure of a warehouse of the present invention in a vertical cross-sectional view. [Diagram 2] 2 is a cross-sectional view taken along line AA in FIG. 1. [Diagram 3] FIG. 3 is a view taken along the arrow B in FIG. 2. [Figure 4] FIG. 2 is a perspective view illustrating the non-combustible insulating panel of FIG. 1. [Diagram 5] 2 is an explanatory diagram illustrating a vertical cross-sectional view of a non-combustible heat-insulating panel installed in the process of constructing the exterior wall structure of FIG. 1. [Figure 6] 2 is an explanatory diagram illustrating, in vertical cross section, a process for forming the sprayed fireproof layer and the sprayed foamed resin insulation layer of FIG. 1. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] The warehouse exterior wall structure and its construction method of the present invention will be described below based on the embodiment shown in the drawings. The present invention is particularly intended for the exterior wall structure of a refrigerated warehouse, where the temperature difference between the inside and outside (external air) is larger than that of a general structure. A refrigerated warehouse is a warehouse that keeps the inside at 10°C or less, and includes a freezer warehouse. In addition to refrigerated warehouses, the present invention can also be applied to constant-temperature warehouses that maintain a constant temperature, and various other warehouses regardless of type. In the following embodiment, the present invention will be described using an example in which the present invention is applied to a refrigerated warehouse, but a constant-temperature warehouse will have a substantially similar structure and construction method.

[0011] In the embodiment of the exterior wall structure 1 of the refrigerated warehouse of the present invention illustrated in Figs. 1 to 3, the first floor and the second floor are shown. The floor slab 17 of the first floor is supported by a foundation beam 18, and the floor slab 17 of the second floor is supported by a girder 19. This exterior wall structure 1 is provided with non-combustible heat insulating panels 2 arranged between adjacent floor slabs 17 spaced apart vertically. The upper end surface and the lower end surface of the non-combustible heat insulating panel 2 are respectively in contact with the lower surface of the outdoor end of the floor slab 17 of the second floor and the upper surface of the outdoor end of the floor slab 17 of the first floor, and are sandwiched and joined between the adjacent floor slabs 17 spaced apart vertically. The X direction, Y direction, and Z direction of the arrows in the drawings respectively indicate the thickness direction, width direction, and height direction of the non-combustible heat insulating panel 2.

[0012] The indoor surface of the noncombustible insulation panel 2 is covered with a sprayed fireproof layer 6. On the outdoor side of the noncombustible insulation panel 2, an exterior steel plate 16 is installed as an exterior material with a gap between it and the noncombustible insulation panel 2. A connection plate 12 is fixed to the outdoor end face of the floor slab 17 with anchor bolts or the like and protrudes from the end face. The exterior steel plate 16 is attached via this connection plate 12.

[0013] As shown in FIG. 4, the noncombustible heat insulating panel 2 is a rectangular plate-like body, and metal surface plates 4 are joined to both surfaces of the noncombustible heat insulating layer 3, and the noncombustible heat insulating layer 3 is sandwiched between the two metal surface plates 4 to form an integral structure. The noncombustible heat insulating panel 2 is designed to meet the requirements stipulated in Article 2, item 9 (noncombustible materials) of the Building Standards Act. The required number of noncombustible heat insulating panels 2 are installed with their widthwise end faces butted against each other. The upper and lower end faces of the noncombustible heat insulating panel 2 can be fixed to the floor slab 17 using mortar, anchor bolts, or the like. In addition, a filler such as mortar may be filled between the butted widthwise end faces of the noncombustible heat insulating panels 2 arranged adjacent to each other. In this embodiment, a moisture-proof tape 2a is attached to the outdoor surface of the noncombustible heat insulating panel 2 over the entire height direction so as to straddle the butted widthwise end faces of the noncombustible heat insulating panels 2. Various known moisture-proof tapes 2a can be used, for example, a moisture-proof tape 2a having an aluminum base.

[0014] Known noncombustible heat insulating materials can be used for the noncombustible heat insulating layer 3, such as isocyanurate foam, polyurethane foam, etc. The thickness of the noncombustible heat insulating layer 3 is preferably set to, for example, 50 mm or more and 300 mm or less. If the thickness is less than 50 mm, it is difficult to ensure sufficient noncombustibility and heat insulation, and if it exceeds 300 mm, the weight increases, which causes a decrease in workability.

[0015] The metal surface plate 4, which covers the entire area of ​​both surfaces of the non-combustible heat insulating layer 3, is made of various steel plates such as general structural carbon steel plates, aluminum alloy plates, etc. The thickness of the metal surface plate 4 is thin, for example, 0.35 mm to 1.0 mm, and more preferably 0.5 mm to 0.8 mm. If the thickness is too small, it becomes difficult to ensure sufficient strength, and if it is too large, the weight increases, which causes a decrease in workability.

[0016] Although a non-metallic surface plate such as a resin surface plate can be used instead of the metal surface plate 4, it is preferable to use the metal surface plate 4 at least on the outdoor surface of the non-combustible insulation layer 3. That is, a structure can be made in which the metal surface plate 4 is bonded to the outdoor surface of the non-combustible insulation layer 3, and a non-combustible resin surface plate (a non-combustible non-metallic surface plate) is bonded to the indoor surface. Using the metal surface plate 4 on the outdoor surface of the non-combustible insulation panel 2 is advantageous in reliably preventing moisture from the outside air from entering the interior of the building.

[0017] The sprayed fireproof layer 6 covering substantially the entire indoor surface of the noncombustible heat insulating panel 2 is formed of various known noncombustible materials 6a, such as rock wool, ceramic fiber, etc. The thickness of the sprayed fireproof layer 6 is, for example, 20 mm to 50 mm, more preferably 25 mm to 35 mm. As the thickness of the sprayed fireproof layer 6 increases, the weight increases, which is a factor in reducing workability.

[0018] In this embodiment, the non-combustible insulating panel 2 and the insulating building material 8 are laid adjacent to the non-combustible insulating panel 2 on the upper surface of the floor slab 17. For example, extruded polystyrene foam is used as the material for the insulating building material 8. The thickness of the insulating building material 8 is, for example, 30 mm or more and 400 mm or less. Providing the insulating building material 8 reduces heat conduction between the upper and lower floors, which is advantageous for further improving insulation.

[0019] The entire upper surface of the heat-insulating building material 8 is covered with a holding concrete 9. The thickness of the holding concrete 9 is, for example, 50 mm or more and 300 mm or less. By providing the holding concrete 9, the effects of protecting the heat-insulating building material 8 and improving the usability of the floor can be obtained.

[0020] A fixing member 5 connected to an anchor bolt or the like protrudes from the sprayed fireproof layer 6 on the indoor side, and an interior steel plate 7 is attached to this fixing member 5 as an interior material. A fixing member 5 connected to an anchor bolt or the like also protrudes from the surface of the pillar 20, and an interior steel plate 7 is attached to this fixing member 5. In this way, the interior steel plate 7 is exposed indoors.

[0021] At the lower end of the interior steel plate 7, a baseboard 21 installed in the pressed concrete 9 extends in the width direction of the non-combustible heat insulating panel 2. In addition, the outer surface of the girder 19 is covered with a fireproof layer 11. The fireproof layer 11 is made of rock wool, ceramic fiber, or the like.

[0022] A metal connection plate 12 protrudes from the outdoor end face of the floor slab 17 via an anchor bolt or the like. A known gusset plate, for example, is used as this connection plate 12. The multiple connection plates 12 are installed at intervals in the extension direction (Y direction) of the outdoor end face of the floor slab 17. In this embodiment, a heat insulating packing 13 is interposed between the noncombustible heat insulating panel 2 and the connection plate 12.

[0023] A metal stud 14 extending in the vertical direction (Z direction) is fixed by a bolt or the like to the protruding tip of each connection plate 12. A gap g1 is formed between the outdoor surface of the non-combustible heat insulating panel 2 and the stud 14. This gap g1 is set to be, for example, 50 mm or more and 400 mm or less.

[0024] Horizontal furring strips 15 are installed on each stud 14 at intervals in the vertical direction, extending in the width direction of the noncombustible insulating panel 2 via angles or the like. Exterior steel plates 16, which serve as exterior materials, are attached to these horizontal furring strips 15. The gap g2 between the exterior surface of the stud 14 and the exterior steel plates 16 is set to, for example, 50 mm or more and 200 mm or less. In this way, the exterior steel plates 16 are installed on the outdoor side of the noncombustible insulating panel 2 via the connecting plate 12 with a sufficient gap between them. Note that as long as the exterior steel plates 16 can be installed via the connecting plate 12, various structures can be adopted without being limited to the structure exemplified in this embodiment.

[0025] A band-shaped sprayed foamed resin insulation layer 10 extending in the extension direction (Y direction) of the outdoor end face is provided in the gap g1 between the outdoor surface of the noncombustible insulation panel 2 and the stud 14. The sprayed foamed resin insulation layer 10 is formed from various known foamed resins 10a, such as foamed urethane resin, extruded foamed polystyrene, etc.

[0026] The sprayed foamed resin insulation layer 10 covers the entire length of the outdoor end face of the floor slab 17 along the extension direction (Y direction) of the outdoor end face, including the upper and lower predetermined ranges of the outdoor end face of the floor slab 17. The size (Z direction dimension) of the upper and lower predetermined ranges covered by the sprayed foamed resin insulation layer 10 is, for example, 100 mm or more and 300 mm or less. The thickness of the sprayed foamed resin insulation layer 10 is, for example, 50 mm or more and 200 mm or less. As the thickness of the sprayed foamed resin insulation layer 10 increases, the weight increases, which causes a decrease in workability. In addition, the connection plate 12 penetrates the sprayed foamed resin insulation layer 10 and protrudes to the outdoor side, and is connected to the exterior steel plate 16 via the partition 14 and the horizontal furring strip 15. In this embodiment, the entire surface range of the sprayed foamed resin insulation layer 10 is covered with the moisture-proof material 10b. Various known moisture-proof materials 10b can be used.

[0027] An example of a procedure for constructing the exterior wall structure 1 according to the present invention is as follows.

[0028] First, as shown in Fig. 5, the non-combustible insulating panels 2 are abutted against the outdoor ends of adjacent floor slabs 17 that are spaced apart vertically, and the non-combustible insulating panels 2 are joined in a state where they are sandwiched between the floor slabs 17 from above and below. A required number of non-combustible insulating panels 2 are butted together and installed for each floor to construct a wall at the outdoor ends of the floor slabs 17.

[0029] Next, as shown in FIG. 6, the noncombustible material 6a is sprayed over the entire exposed surface of the indoor side of the installed noncombustible insulation panel 2 to form the sprayed fireproof layer 6. A connecting plate 12 is provided to protrude from the outdoor end face of the floor slab 17. Then, a foamed resin 10a is sprayed over a predetermined range above and below the outdoor end face of the floor slab 17 along the extending direction of the outdoor end face to form the sprayed foamed resin insulation layer 10. The connecting plate 12 is made to protrude to the outdoor side by penetrating the sprayed foamed resin insulation layer 10. The spraying of the noncombustible material 6a and the spraying of the foamed resin 10a may be performed in either order, or in parallel. A moisture-proof material 10b is applied to the entire surface of the formed sprayed foamed resin insulation layer 10.

[0030] Next, on the indoor side, an interior steel plate 7 is installed so as to cover the sprayed fireproof layer 6, and then a baseboard 21 is installed. The fireproof layer 11 covering the girder 19 may be formed by spraying a fireproof material onto the surface of the girder 19 before the interior steel plate 7 is installed.

[0031] On the outdoor side, after connecting the studs 14 to the connecting plate 12, horizontal furring strips 15 are installed on the studs 14. Next, exterior steel plates 16 are attached to the horizontal furring strips 15 to complete the construction of the exterior materials. Either the indoor work or the outdoor work may precede the other, or they may be performed in parallel. In this way, the exterior wall structure 1 illustrated in Figures 1 to 3 is constructed.

[0032] In this exterior wall structure 1, the floor slab 17 is made of concrete (reinforced concrete) and therefore has sufficient fire resistance. The noncombustible insulating panel 2 also has sufficient fire resistance. Therefore, an excellent fireproof structure is formed, partitioned by the upper and lower floor slabs 17 and the noncombustible insulating panel 2. Furthermore, a sprayed fireproof layer 6 is formed on the indoor side surface of the noncombustible insulating panel 2, ensuring further fire resistance.

[0033] The outdoor side of the fireproof structure partitioned by the upper and lower floor slabs 17 and the non-combustible heat insulating panel 2 is connected to the floor slab 17 via a connection plate 12 protruding from the outdoor end surface of the floor slab 17. In other words, the outdoor members such as the exterior steel plate 16, studs 14, and horizontal furring strips 15 are connected to the outdoor side of the non-combustible heat insulating panel 2 via the connection plate 12, leaving a gap between them. Open Therefore, these outdoor members do not adversely affect the fire resistance of the fire-resistant structure partitioned by the upper and lower floor slabs 17 and the noncombustible heat insulating panels 2.

[0034] Moreover, in this embodiment, the area including the intersection of the floor slab 17 and the non-combustible insulation panels 2 arranged above and below the floor slab 17 is covered with the band-shaped sprayed foamed resin insulation layer 10, which is more advantageous in blocking the intrusion of moisture from the outside air to the indoor side and heat conduction. Furthermore, the entire surface area of ​​the sprayed foamed resin insulation layer 10 is covered with the moisture-proof material 10b, so that the intrusion of moisture to the indoor side is more reliably prevented. Since the connecting plate 12 is embedded in the sprayed foamed resin insulation layer 10, heat conduction with the floor slab 17 through the connecting plate 12 is also suppressed. In addition, the outdoor surface of the non-combustible insulation panel 2 is covered with the exterior steel plate 16 to be protected from the external environment.

[0035] From the viewpoint of construction of the exterior wall structure 1, it is sufficient to install the noncombustible insulation panel 2, spray the noncombustible material 6a, and attach the exterior steel plate 16 via the connection plate 12. In this embodiment, the only additional work required is spraying the foamed resin 10a to form the sprayed foamed resin insulation layer 10. Therefore, difficult and time-consuming work can be almost completely eliminated or minimized, which is advantageous for simplifying construction. [Explanation of symbols]

[0036] 1 External wall structure 2. Non-combustible insulation panels 2a Moisture-proof tape 3. Non-combustible insulation layer 4 Metal surface plate 5 Fixing material 6 Sprayed fireproof layer 6a Noncombustible material 7 Interior steel plate 8. Thermal insulation materials 9. Reinforced concrete 10 Sprayed foam insulation layer 10a Foam resin 10b Moisture-proofing material 11 Fireproof layer 12 Connection plate (gusset plate) 13 Insulating packing 14 Studs 15 Horizontal furring strip 16 Exterior steel plate (exterior material) 17 Floor slab 18 Foundation beam 19 Large beam 20 Pillars 21 Baseboard

Claims

1. In the exterior wall structure of a warehouse, non-combustible insulation panels are arranged between adjacent floor slabs spaced apart from each other vertically, A warehouse exterior wall structure characterized in that the non-combustible insulation panels abut against the outdoor ends of each of the floor slabs and are joined together by being sandwiched between the top and bottom, the indoor surface of the non-combustible insulation panels is covered with sprayed non-combustible material, and an exterior material is installed on the outdoor side of the non-combustible insulation panels with a gap between them via a connecting plate protruding from the outdoor end surface of the floor slab.

2. An exterior wall structure of a warehouse as described in claim 1, wherein the non-combustible insulation panel is covered from its upper end to its lower end with the non-combustible material.

3. A warehouse exterior wall structure as described in claim 1 or 2, further comprising a sprayed foamed resin insulation layer disposed in the gap and covering a specified range above and below the outdoor end face of the floor slab, including the outdoor end face, along the extending direction of the outdoor end face, and the connecting plate penetrates the foamed resin insulation layer and protrudes to the outdoor side to connect to the exterior material.

4. A method for constructing the exterior wall structure of a warehouse, characterized by abutting a non-combustible insulation panel to the outdoor ends of adjacent floor slabs spaced apart from each other, joining the non-combustible insulation panel in a sandwiched state between each of the floor slabs, spraying a non-combustible material over the entire exposed surface of the indoor side of the non-combustible insulation panel to form a fire-resistant layer, and installing an exterior material on the outdoor side of the non-combustible insulation panel with a gap between it and the non-combustible insulation panel via a connecting plate protruding from the outdoor end surface of the floor slab.

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