JP2020139404A - Fireproof structure - Google Patents

Abstract

To provide an easy-to-construct fireproof structure capable of improving the fire resistance of an outer wall and a column located on the indoor side of the outer wall.SOLUTION: The fireproof structure includes an outer wall 101, and a column 100 provided on the indoor side further than the outer wall 101, the outer wall 101 including a plurality of vertically long steels 1 arranged in parallel at predetermined spaces, a face bar 4 provided on the outdoor side of the steel 1 along the plurality of steels 1 and having fire resistance efficiency, and an outer wall material 5 provided on the outdoor side of the face bar 4. The outer face of the column 100 excluding the face facing a space 104 between the column 100 and the face bar 4 is coated with a fireproof coating material 102. The fireproof coating material 102 is provided so as to block the space 104 between the column 100 and the face bar 4. To the steel 1 located in the space 104 blocked by the fireproof coating material 102, a fastener 6 is fixed for fastening the outer wall material 5.SELECTED DRAWING: Figure 1

Description

The present invention relates to a fireproof structure in general, and more particularly to a fireproof structure including an outer wall in a steel-framed building and columns provided on the indoor side of the outer wall.

Buildings with fire resistance are roughly classified into fireproof buildings and semi-fireproof buildings stipulated by the Building Standards Act, depending on the difference in fireproofness. In fireproof buildings, structures such as walls, columns, beams, and floors need to have predetermined fireproof performance. For example, in the case of a fireproof building having a predetermined number of floors, the fireproof structure of the outer wall is required to have fireproof performance for one hour (Building Standards Law Enforcement Ordinance Article 107).

In particular, various structures are adopted in order to improve the fire resistance of the outer wall and the pillars on the indoor side of the outer wall.

For example, Patent Document 1 describes an outer wall structure in which partition panels provided with two gypsum boards are provided on the outdoor side and the indoor side, respectively.

Further, Patent Document 2 describes that after the outer wall is constructed, the periphery of the pillar on the indoor side of the outer wall is covered with a fireproof coating material.

Japanese Unexamined Patent Publication No. 2004-176316 Japanese Unexamined Patent Publication No. 2004-225271

However, in the case of the outer wall structure as described in Patent Document 1, since the partition panels are provided on the outdoor side and the indoor side respectively, the distance between the pillar and the outer wall is narrow, and as described in Patent Document 2, There was a problem that it was difficult to cover the pillars with a fireproof coating material.

The present invention has been made in view of the above points, and an object of the present invention is to provide a fireproof structure that can be easily constructed while being able to improve the fire resistance of the outer wall and the pillars on the indoor side of the outer wall.

The fireproof structure according to the present invention is a fireproof structure including an outer wall and a pillar provided on the indoor side of the outer wall. The outer wall includes a plurality of vertically long steel frames arranged side by side at predetermined intervals, a fire-resistant face material provided on the outdoor side of the steel frame along the plurality of steel frames, and the above. It is provided with an outer wall material provided on the outdoor side of the face material. The outer surface of the pillar except for the surface facing the space between the pillar and the face material is covered with the fireproof coating material, and the fireproof coating material closes the space between the pillar and the face material. It is provided. A fastener for fastening the outer wall material is fixed to the steel frame located in the space closed by the fireproof covering material.

In the present invention, the fire resistance of the outer wall and the pillars on the indoor side of the outer wall can be improved, and the fireproof covering material can be easily applied.

It is a perspective view which shows an example of the outer wall structure in the fireproof structure of this embodiment. It is a top view of the outer wall structure of FIG. FIG. 5 is a cross-sectional view taken along line XX of the outer wall structure of FIG. It is a front view which shows an example of the construction process of the outer wall structure of FIG. It is a front view which shows an example of the construction process of the outer wall structure of FIG. It is a front view which shows an example of the construction process of the outer wall structure of FIG. It is a front view which shows an example of the construction process of the outer wall structure of FIG. 8A is a front view showing an example of the fastener used in the outer wall structure of FIG. 1, and FIG. 8B is a cross-sectional view showing an example of the outer wall structure using the fastener of FIG. 8A. It is a front view which shows an example of the construction process of the modification of the outer wall structure in the fireproof structure of this embodiment. It is sectional drawing of the outer wall structure shown in FIG. It is sectional drawing which shows another modification of the outer wall structure in the fireproof structure of this embodiment. 12A and 12B are perspective views showing a modified example of the metal auxiliary material used in the outer wall structure in the fireproof structure of the present embodiment. It is sectional drawing which shows the further modification of the outer wall structure in the fireproof structure of this embodiment. It is a perspective view which shows an example of the support member used in the outer wall structure shown in FIG. 15A to 15C show deformation examples of the support member used in the outer wall structure in the fireproof structure of the present embodiment. 15A is a perspective view of the support member, FIG. 15B is a front view of the support member, and FIG. 15C is a bottom view. It is sectional drawing which shows the outer wall structure using the support member shown in FIG. It is a top view which shows the fireproof structure which concerns on this embodiment. It is a perspective view of the fireproof structure shown in FIG. 19A and 19B are plan views showing a modified example of the fireproof structure according to the present embodiment. It is a top view which shows an example of the fireproof structure which concerns on this Embodiment in a protruding corner.

Hereinafter, modes for carrying out the present invention will be described.

The fireproof structure according to the present embodiment includes an outer wall 101 and a pillar 100 provided on the indoor side of the outer wall 101. The outer wall 101 includes a plurality of vertically long steel frames 1 arranged side by side at predetermined intervals, and a face material 4 having fire resistance and provided on the outdoor side of the steel frame 1 along the plurality of steel frames 1. , An outer wall material 5 provided on the outdoor side of the face material 4 is provided. The outer surface of the pillar 100 except for the surface facing the space 104 between the pillar 100 and the face material 4 is covered with the fireproof coating material 102, and the space 104 between the pillar 100 and the face material 4 is blocked by fire resistance. A covering material 102 is provided.

In the fireproof structure of the present embodiment, since the face material is not provided on the indoor side of the steel frame 1, the space 104 between the column 100 and the outer wall 101 is large. Therefore, it is easy to install the fireproof coating material 102 on the pillar 100. Further, since the outer wall 101 includes the face material 4 and the outer wall material 5 having fire resistance, the fire resistance of the outer wall 101 can be ensured. Further, since the pillar 100 is surrounded by the fireproof covering material 102, the fire resistance of the pillar 100 can be ensured.

In the present embodiment, the steel frame 1 is a lightweight steel frame, and the face material 4 is provided on the outdoor side of the steel frame 1, and is a rectangular first face material 2 in a front view and an outdoor side of the first face material 2. The outer wall material 101 is rectangular in front view, and the two vertical sides 25 and 26 of the first face material 2 are made of steel frame 1. The two vertical sides 35 and 36 of the second face material 3 are on the outdoor side, and are on the outdoor side of the steel frame 1 different from the steel frame 1 where the vertical sides 25 and 26 of the first face material 2 are located. The two lateral sides 37 and 38 of the face material 3 of 2 and the two horizontal sides 27 and 28 of the first face material 2 are displaced in the vertical direction, and the outer wall material 5 2 to be constructed in the horizontally long direction. The two long sides 57, 58 do not overlap with the two side sides 27, 28 of the first face material 2 and the two side sides 37, 38 of the second face material 3 in the thickness direction, and the fastener 6 is attached. It may be fixed to the steel frame 1 via the steel frame 1.

In the present embodiment, the first face material 2 and the second face material 3 may be gypsum board.

In the present embodiment, at least the second face material 3 may be a calcium silicate plate.

In the present embodiment, the outer wall 101 includes a first outer wall 107 forming a protruding corner and a second outer wall 108 adjacent in a direction intersecting the first outer wall 107, and the pillar 100 is the first outer wall 107. And the outer surface of the pillar 100 facing the second outer wall 108 and facing the space 104 between the pillar 100 and the face material 4 in the first outer wall 107 and the face material 4 in the second outer wall 108. The fireproof coating material 102 is covered with the fireproof coating material 102, and the fireproof coating material 102 closes the space 104 between the pillar 100 and the face material 4 on the first outer wall 107 and the face material 4 on the second outer wall 108. It may be provided.

In the present embodiment, the refractory covering material holding means 106 is provided from the surface of the pillar 100 which is not facing the face material 4 and is located substantially vertically to the vicinity of the back surface of the face material 4, and the refractory covering material is provided. The refractory coating material 102 may be provided on the holding means 106.

In the present embodiment, the heat insulating material 105 may be provided on the indoor side of the face material 4.

Hereinafter, the fireproof structure of the present embodiment will be described in more detail.

First, the structure of the outer wall 101 in the fireproof structure of the present embodiment will be described.

The outer wall 101 includes a steel frame 1, a face material 4 provided on the outdoor side of the steel frame 1, and an outer wall material 5 provided on the outdoor side of the face material 4. Further, the face material 4 includes a first face material 2 and a second face material 3. Therefore, in the present embodiment, as shown in FIG. 1, the first face material 2 is provided on the outdoor side of the steel frame 1, and the second face material 3 is provided on the outdoor side of the first face material 2. The outer wall material 5 is provided on the outdoor side of the second face material 3.

The steel frame 1 is a long furring strip. The cross-sectional shape of the steel frame 1 may be a rectangular shape such as a square pipe, or a C shape. The cross section of the steel frame 1 means a cross section in a direction perpendicular to the long direction. The steel frame 1 may be formed from one furring strip, or a plurality of furring strips may be combined to form one steel frame 1. The steel frame 1 of the present embodiment is a lightweight steel frame. The steel frame 1 is not limited to the lightweight steel frame.

The first face material 2 and the second face material 3 are rectangular in front view. The first face material 2 and the second face material 3 are made of a material having fire resistance. The first face material 2 and the second face material 3 of the present embodiment are gypsum boards. Examples of this gypsum board include reinforced gypsum board specified in JIS A 6901. Furthermore, it is preferable that the gypsum in the core of the reinforced gypsum board is waterproofed with a water-repellent material or the like to prevent the strength and durability of the reinforced gypsum board from being lowered by rainwater or humidity. Can be done. The first face material 2 and the second face material 3 are not limited to gypsum board, and may be made of a material having fire resistance. For example, the first face material 2 and the second face material 3 may be a calcium silicate board or a cement board. For example, the first face material 2 and the second face material 3 may both be calcium silicate plates. Since the calcium silicate board is thinner than the gypsum board, the outer wall 101 can be made thinner, and the fire resistance of the calcium silicate board can ensure the fire resistance of the outer wall 101. Further, the first face material 2 may be a gypsum board, and the second face material 3 may be a calcium silicate board. In this case, since the calcium silicate board has higher water resistance than the gypsum board, the second face material 3 located on the outdoor side of the first face material 2 is a calcium silicate board, so that the water resistance of the outer wall 101 is increased. Can be improved.

The thickness of the first face material 2 and the second face material 3 is selected according to the required fire resistance performance, and is in the range of, for example, 15 to 27 mm. The sizes of the first face material 2 and the second face material 3 are not particularly limited, but for example, the short side is in the range of 600 to 1220 mm and the long side is in the range of 1200 to 3030 mm.

It is preferable that the first face material 2 and the second face material 3 have the same size. That is, the vertical sides 25 and 26 of the first face material 2 and the vertical sides 35 and 36 of the second face material 3 have the same length, and the horizontal sides 27 and 28 and the second face material 2 of the first face material 2 have the same length. It is preferable that the lateral sides 37 and 38 of the face material 3 have the same length.

The outer wall material 5 is a rectangular ceramic siding when viewed from the front. The size and thickness of the ceramic siding are appropriately set, and for example, the short side is in the range of 300 to 1000 mm, the long side is in the range of 1000 to 3600 mm, and the thickness is in the range of 12 to 40 mm.

Subsequently, the construction structure of the steel frame 1, the first face material 2, the second face material 3, and the outer wall material 5 in the outer wall 101 of the present embodiment will be described in detail.

In the outer wall 101 of the present embodiment, the steel frame 1 is installed on the surface of the base material as a vertical furring strip that is vertically long, that is, long in the vertical direction. The steel frames 1 are arranged side by side in the left-right direction at predetermined intervals (see FIGS. 1 and 2). The intervals at which the steel frames 1 are installed are appropriately set, and may be, for example, equal intervals.

In the outer wall 101 of the present embodiment, as shown in FIGS. 1 to 4, a plurality of first face materials 2 are provided adjacent to each other in the vertical and horizontal directions along the plurality of arranged steel frames 1.

In the present embodiment, the two vertical sides 25 and 26 of the first face material 2 are located on the steel frame 1 (see FIG. 2). In the present specification, the steel frame 1 in which the vertical sides 25 and 26 of the first face material 2 are located is also referred to as the first steel frame 11. When a plurality of first face materials 2 are installed side by side in the left-right direction, the vertical sides 25 and 26 of all the first face materials 2 are located on the steel frame 11 (see FIG. 2). The first face material 2 is fixed to the steel frame 1 by a fixing member. Examples of the fixing member include screws, nails, and screws.

When a plurality of first face materials 2 are adjacent to each other in the vertical direction, the side surfaces of the first face materials 2 are butted against each other. The portion where the lateral sides of the first face material 2 are butted against each other is the butted portion 7 (see FIG. 4). That is, the horizontal side 281 of the first face material 21 located on the upper side and the horizontal side 272 of the first face material 22 located on the lower side are butted against each other.

Further, when a plurality of first face materials 2 are adjacent to each other in the left-right direction, the vertical sides of the first face materials 2 are butted against each other. The portion where the vertical sides of the first face material 2 are butted against each other is the butted portion 8 (see FIG. 4). That is, the vertical side 263 of the first face material 23 located on the right side and the vertical side 254 of the first face material 24 located on the left side are butted against each other.

In the present embodiment, a second face material 3 is provided on the outdoor side of a plurality of side-by-side first face materials 2 adjacent to each other in the vertical and horizontal directions (see FIGS. 1 to 3 and 5). That is, the second face material 3 is along the plurality of steel frames 1 arranged side by side like the first face material 2. In the present embodiment, the two vertical sides 35 and 36 of the second face material 3 are located in a steel frame 1 different from the steel frame 1 (steel frame 11) in which the vertical sides 25 and 26 of the first face material 2 are located. (See FIGS. 1 and 2). In the present specification, the steel frame 1 in which the vertical sides 35 and 36 of the second face material 3 are located is also referred to as a second steel frame 12. When a plurality of second face materials 3 are installed side by side in the left-right direction, the vertical sides 35 and 36 of all the second face materials 3 are located on the second steel frame 12 (see FIG. 2). The second face material 3 is fixed to the steel frame 1 by a fixing member via the first face material 2. Examples of the fixing member include screws, nails, and screws.

When a plurality of second face materials 3 are adjacent to each other in the vertical direction, the side surfaces of the second face materials 3 are butted against each other. The portion where the lateral sides of the second face material 3 are butted against each other is the butted portion 9 (see FIG. 5). That is, the horizontal side 381 of the second face material 31 located on the upper side and the horizontal side 372 of the second face material 32 located on the lower side are butted against each other.

Further, when a plurality of second face materials 3 are adjacent to each other in the left-right direction, the vertical sides of the second face materials 3 are butted against each other. The portion where the vertical sides of the second face material 3 are butted against each other is the butted portion 10 (see FIG. 5). That is, the vertical side 363 of the second face material 33 located on the right side and the vertical side 354 of the second face material 34 located on the left side are butted against each other.

As shown in FIG. 5, the outer wall 101 of the present embodiment is installed so that the directions of the vertical side and the horizontal side of the first face material 2 and the second face material 3 are the same. Further, the two lateral sides 37 and 38 of the second face material 3 and the two horizontal sides 27 and 28 of the first face material 2 are positioned so as to be offset in the vertical direction (see FIGS. 3 and 5). ). That is, the closest lateral sides of the first face material 2 and the second face material 3 do not overlap in the thickness direction and are located apart in the vertical direction. When a plurality of second face materials 3 are adjacent to each other in the vertical direction, the closest abutting portion 9 between the side surfaces of the second face material 3 and the side surfaces of the first face material 2 are close to each other. The butt portion 7 of the above is positioned so as to be displaced in the vertical direction. The abutting portion 9 between the lateral sides of the second face material 3 and the abutting portion 7 between the lateral sides of the first face material 2 do not overlap in the thickness direction, so that the second surface in the event of a fire Even when the material 3 contracts and a gap is formed in the abutting portion 9 between the lateral sides of the second face material 3, the back surface side of the abutting portion 9 between the side sides of the second face material 3 Since the first face material 2 is present, the fire resistance performance is less likely to deteriorate.

The vertical distance between the closest horizontal sides of the first face material 2 and the second face material 3 is appropriately set. For example, when the lengths of the vertical sides of the first face material 2 and the second face material 3 are the same, the vertical direction of the closest horizontal sides of the first face material 2 and the second face material 3 The distance can be halved from the length of the vertical sides 25 and 26 of the first face material 2. In the present embodiment, the distance between the abutting portion 9 between the horizontal sides of the second face material 3 and the abutting portion 7 between the horizontal sides of the first face material 2 is the vertical side 25 of the first face material 2. , Is about half the length of 26. In this case, since the abutting portions 7 and 9 between the lateral sides of the first face material 2 and the second face material 3 exist at equal intervals, the abutting portions 15 and the long sides of the outer wall material 5 and the first It becomes easy to select the size of the outer wall material 5 and arrange the outer wall material 5 so that the abutting portions 7 and 9 of the side surfaces of the face material 2 of 1 and the second face material 3 do not overlap with each other.

In the present embodiment, a plurality of vertically long joiners 14 are provided on the outdoor side surface of the second face material 3 (see FIG. 6). The joiner 14 overlaps a portion (butting portion 16) on the outdoor side surface of the second face material 3 where the vertical sides of a plurality of outer wall materials 5 provided on the outdoor side of the second face material 3 abut each other. It is arranged in a predetermined position (see FIG. 7). The joiner 14 is fixed to the steel frame 1 via the second face material 3 and the first face material 2. Examples of the joiner 14 include a joiner having a hat-shaped cross section as shown in FIG.

In the present embodiment, a plurality of fasteners 6 are further provided on the outdoor side surface of the second face material 3 (see FIG. 6). The fastener 6 overlaps with a portion (butting portion 15) on the outdoor side surface of the second face material 3 where the lateral sides of the plurality of outer wall materials 5 provided on the outdoor side of the second face material 3 abut each other. It is arranged in a predetermined position (see FIG. 7). The fastener 6 is fixed to the steel frame 1 by a fixing member via the second face material 3 and the first face material 2. Examples of the fixing member include screws, nails, and screws, and a plurality of types may be used in combination.

The fastener 6 of the present embodiment is, for example, as shown in FIGS. 8A and 8B, for holding the fixing portion 61 for contacting and fixing the second face material 3 and the second outer wall material 5. A holding portion 62 and a protruding piece 63 are provided.

When the fastener 6 in the fixing portion 61 is installed on the outdoor side surface of the second face material 3, the upper end portion is the upper end portion 61a and the lower end portion is the lower end portion 61b (FIG. 8A). reference). The fixing portion 61 is provided with a fixing hole 610 for inserting the fixing member. In the present embodiment, the fixing portion 61 is provided with a plurality of fixing holes 610.

The holding portion 62 is composed of a first piece 621, a second piece 622, and a third piece 623 (see FIG. 8B). The first piece 621 is provided so as to project forward from substantially the center of the fixing portion 61 in the vertical direction. The second piece 622 is provided so as to project from the front end of the first piece 621 toward the upper end portion 61a side of the fixing portion 61. The second piece 622 supports the outer wall material 5 attached to the outdoor side of the upper end portion 61a. The second piece 622 of the present embodiment is continuously provided over substantially the entire length of the first piece 621 in the left-right direction without being divided, but may be provided by being divided. At the front end of the first piece 621, a third piece 623 projecting toward the lower end portion 61b side of the fixing portion 61 is provided (see FIG. 8A). The third piece 623 supports the outer wall material 5 attached to the outdoor side of the lower end portion 61b (see FIG. 8B). Although the third piece 623 of the present embodiment is provided by being divided into two, it may be provided continuously. The vertical direction and the horizontal direction of the fastener 6 mean the vertical direction and the horizontal direction of the fastener 6 in the front view of the fireproof structure when the fastener 6 is used.

The projecting piece 63 is provided so as to project forward from both left and right ends of the fixing portion 61 so as to have a length shorter than the projecting length of the first piece 621 (see FIG. 8B). The projecting piece 63 allows a ventilation space to be formed between the outer wall material 5 and the second face material 3. As shown in FIG. 8A, the protruding piece 63 may have an inward-facing piece 631 and an outward-facing piece 632 that project to the left and right from the front end.

The inward-facing piece 631 is provided so as to extend from the front end of the projecting piece 63 substantially parallel to the fixing portion 61 and inside the fixing portion 61 (see FIG. 8A). In the protruding piece 63, the inward-facing piece 631 is provided on the lower end portion 61b side of the fixed portion 61 with respect to the first piece 621, and the upper end edge of the inward-facing piece 631 provided on the protruding pieces 63 on both the left and right sides is the first piece 621. The first piece 621 is supported in contact with the lower surface of the above. In this way, by supporting the first piece 621 with the inward-facing piece 631 substantially perpendicular to the first piece 621, the first piece 621 is less likely to be deformed. The outward-facing piece 632 is provided so as to extend from the front end of the projecting piece 63 substantially parallel to the fixing portion 61 and to the outside of the fixing portion 61. The outward piece 632 can further suppress the deformation of the protruding piece 63.

The fastener 6 having the above configuration can be obtained, for example, by appropriately cutting or bending a metal plate such as a steel plate. For example, the first piece 621, the second piece 622, the third piece 623, the protruding piece 63, the inward piece 631, and the outward piece 632 can be formed by cutting out a part of the fixing portion 61.

In the present embodiment, the vertical length and the horizontal length of the fastener 6 are substantially the same, but are not limited to this. The length of the fastener 6 in the left-right direction is appropriately set, but it is preferably substantially the same as the length of the two long sides 57 and 58 of the outer wall material 5. Approximately the same means that they do not have to be exactly the same, but may be slightly shorter. The fastener 6 may be shorter than the long sides 57, 58 of the outer wall material 5, for example, so as not to overlap the joiner 14. If the fastener 6 is long in the left-right direction, the fastener 6 can be easily installed, and the outer wall material 5 can be more easily supported by the fastener 6. When the fastener 6 is long, the fixing holes 610 may be appropriately provided according to the arrangement interval of the steel frame 1.

In this embodiment, as shown in FIG. 6, six fasteners 6 are provided on the outdoor side surface of the second face material 3. The number of fasteners 6 is not limited to this, and is appropriately set according to the shape of the fasteners 6 and the like. For example, a plurality of fasteners 6 whose left and right lengths are shorter than half the length of the long side of the outer wall material 5 may be provided on the outdoor side surface of the second face material 3.

Further, as shown in FIG. 6, it is preferable that the moisture permeable waterproof sheet 40 is provided on the outdoor side surface of the second face material 3. In this case, the joiner 14 and the fastener 6 are fixed to the second face material 3 via the moisture permeable waterproof sheet 40. The moisture permeable waterproof sheet 40 has a property of preventing the ingress of moisture and allowing moisture (water vapor) to permeate. The moisture permeable waterproof sheet 40 releases moisture to the surface side, and the occurrence of dew condensation in the fireproof structure is easily suppressed. Further, even when water such as rainwater infiltrates from the outer wall material 5, it becomes easy to prevent the infiltration of water into the second face material 3 side. The moisture-permeable waterproof sheet 4 may be provided on the entire surface of the second face material 3.

In the present embodiment, a plurality of outer wall materials 5 are provided adjacent to each other on the outdoor side of the plurality of second face materials 3 arranged side by side (see FIGS. 1 to 7 and 7). That is, the outer wall material 5 is along the plurality of steel frames 1 arranged side by side like the first face material 2 and the second face material 3. The outer wall material 5 is arranged so that the vertical side is the short side and the horizontal side is the long side.

The outer wall material 5 is installed via the fastener 6 provided on the outdoor side surface of the second face material 3 and the joiner 14 (see FIGS. 2 and 7). The two short sides 55 and 56 of the outer wall material 5 are located on the steel frame 1 (see FIG. 2). The steel frame 1 to which the outer wall material 5 is fixed may be the same as or different from the first steel frame 11 or the second steel frame 12. When a plurality of outer wall materials 5 are adjacent to each other in the vertical and horizontal directions, the short sides 55 and 56 of all the outer wall materials 5 are in contact with the joiner 14 and are located on the steel frame 1. The outer wall material 5 is fixed to the steel frame 1 by the fastener 6 via the first face material 2 and the second face material 3.

When a plurality of outer wall materials 5 are adjacent to each other in the vertical direction, the outer wall materials 5 are abutted against each other via fasteners 6. The portion where the long sides of the outer wall material 5 are butted against each other is the butted portion 15 (see FIG. 7). That is, the lateral side 581 of the outer wall material 51 located on the upper side and the lateral side 572 of the outer wall material 52 located on the lower side are butted with each other via the fastener 6.

Further, when a plurality of outer wall materials 5 are adjacent to each other in the left-right direction, the vertical sides of the outer wall materials 5 are butted against each other via the joiner 14 (see FIG. 7). The portion where the short sides of the outer wall material 5 are butted against each other is the butted portion 16. That is, the short side 563 of the outer wall material 53 located on the right side and the right short side 554 of the outer wall material 54 located on the left side are butted against each other. It is preferable that the abutting portion 16 between the short sides of the outer wall material 5 is filled with a sealing material 17 in order to close the gap. Examples of the sealing material 17 include a silicone-based resin.

The two long sides 57 and 58 of the outer wall material 5 do not overlap with the two side sides 27 and 28 of the first face material 2 and the two side sides 37 and 38 of the second face material 3 in the thickness direction. (See FIG. 3). The positions of the two short sides 55 and 56 of the outer wall material 5 are in the thickness direction with the two vertical sides 25 and 26 of the first face material 2 and the two vertical sides 35 and 36 of the second face material 3. It may or may not match.

When a plurality of outer wall materials 5 are adjacent to each other in the vertical direction, the abutting portion 15 between the long sides of the outer wall material 5, the abutting portion 7 between the lateral sides of the first face material 2, and the second face material 3 Does not overlap with the abutting portion 9 of the side surfaces of the above (see FIG. 7). As a result, even if the outer wall material 5 contracts in the event of a fire and a gap is formed in the butt portion 15 between the long sides of the outer wall material 5, the butt portion 15 between the long sides of the outer wall material 5 Since the second face material 3 is present on the back surface side, the fire resistance performance is less likely to deteriorate.

The length of the vertical side of the first face material 2 and the second face material 3 is preferably twice the length of the short side of the outer wall material 5. Further, it is preferable that the lateral side of the second face material 3 and the horizontal side of the first face material 2 are positioned in the vertical direction with the same length as the short side of the outer wall material 5. .. The same length does not have to be exactly the same, but includes the meaning that they are approximately the same. As a result, the butt portion 15 between the long sides of the outer wall material 5, the butt portion 7 between the side sides of the first face material 2, and the butt portion 9 between the side sides of the second face material 3 are heavy. It can be easily arranged so that it does not become.

It is more preferable that the two long sides of the outer wall material 5 are located substantially at the center between the horizontal side of the first face material 2 and the horizontal side of the second face material 3 in the vertical direction. Approximately the center does not have to be the center (middle) in a strict sense, and includes the meaning that it may be slightly shifted up and down. For example, when a Sabroku plate (size 3 shaku x 6 shaku, 910 x 1820 mm) is used as the first face material 2 and the second face material 3, they are provided in the horizontally long direction and vertically on the vertical side, respectively. It can be arranged with a deviation of 1/2 of the size, that is, 1.5 shaku. Then, an outer wall material 5 having a size of 1.5 shaku x 10 shaku (455 x 3030 mm) is used and provided in the horizontally long direction, and the long side of the outer wall material 5 is provided on the side of the first face material 2 and the first. It can be located substantially in the center between the horizontal side of the face material 3 and the vertical direction. In this case, the lateral side of the first face material 2, the horizontal side of the second face material 3, and the long side of the outer wall material 5 are likely to be arranged so as not to overlap in the thickness direction, for example, the first. The side surface of the face material 2, the side side of the second face material 3, and the long side of the outer wall material 5 are arranged so as to be separated by about 0.75 shaku.

In the present embodiment, the sizes of the first face material 2 and the second face material 3 are the same, and the directions of the long side and the short side of the first face material 2 and the second face material 3 are the same. Is. As a result, it becomes easy to construct so that the lateral side of the first face material 2, the horizontal side of the second face material 3, and the long side of the outer wall material 5 do not overlap in the thickness direction. The size and orientation of the first face material 2 and the second face material 3 may be different. For example, both the first face material 2 and the second face material 3 may be arranged so that the vertical side is the long side and the horizontal side is the short side. Alternatively, one of the first face material 2 and the second face material 3 has a long side and a horizontal side as a short side (that is, construction in the horizontally long direction), and the other vertical side is a short side and a horizontal side. The sides may be arranged so as to be long sides (that is, construction in the vertically long direction).

Further, as shown in FIGS. 9 and 10, a metal tape 18 is provided at the abutting portion 7 where the lateral side 281 of the first face material 21 and the lateral side 272 of the first face material 22 are butted against each other. You may. The metal tape 18 is provided so as to straddle the lateral side 281 of the first face material 21 and the lateral side 272 of the first face material 22 and cover the abutting portion 7 between the lateral sides. preferable. It is preferable that the metal tape 18 is provided at the abutting portion 7 between the lateral sides over substantially the entire length of the lateral sides 281 and 272 of the first face materials 21 and 22. The metal tape 18 is preferably provided over substantially the entire length of the outer wall 101 in the left-right direction. The substantially total length does not have to be the total length in a strict sense, and includes the meaning that it may be slightly longer or shorter. The width of the metal tape 18 is not particularly limited as long as it can cover the butt portion 7.

Examples of the material of the metal tape 18 include aluminum and steel. As the metal tape 18, an aluminum tape is preferable. Since aluminum has a relatively high heat emissivity among metals, it is preferable that heat is less likely to be transferred from the abutting portion 7 to the first face material 2 and the second face material 3 in the event of a fire. Further, aluminum is preferable because it is relatively inexpensive among metals. Even when the first face material 2 contracts in the event of a fire and a gap is formed in the abutting portion 7 between the side surfaces, the gap is covered by the metal tape 18, so that the fire resistance performance Is less likely to decrease. Further, the metal tape 18 may also be provided on the abutting portion 8 between the vertical sides of the first face material 2. In this case, the fire resistance performance can be further improved. Since the steel frame 1 is present on the back surface side of the abutting portion 8 between the vertical sides of the first face material 2, the metal tape 18 may not be provided.

Since the metal tape 18 is provided on the butt portion 7, the fire resistance performance of the outer wall 101 is improved, so that even if the thickness of the first face material 2 and the second face material 3 is, for example, 15 mm. Good. Even in this case, sufficient fire resistance can be ensured. Further, when the thickness of the first face material 2 and the second face material 3 is 15 mm, it is lighter than the face material such as gypsum board having a thickness larger than 15 mm. Therefore, the first face material 2 and the first face material 3 The face material 3 of 2 can be easily constructed.

The outer wall 101 of the present embodiment is not limited to the above structure. For example, the lateral sides 381 and 372 are butted against each other and are adjacent to the surfaces of the second face materials 31 and 32 in a substantially horizontal direction, that is, substantially parallel to the horizontal sides 381 and 372 of the second face materials 31 and 32. A metal auxiliary material 19 may be provided (see FIG. 11). Approximately horizontal means that it does not have to be horizontal in the strict sense and may be slightly tilted. The metal auxiliary material 19 may be provided on the second face material 3 via the moisture permeable waterproof sheet 4.

The metal auxiliary material 19 has at least a fixing portion 191. The fixing portion 191 is a portion for fixing the metal auxiliary material 19 itself to the second face material 3. The fixing portion 191 may be appropriately provided with a fixing hole 190 for inserting the fixing member. The metal auxiliary material 19 can hold down the second face material 3 from the surface side. By providing the metal auxiliary material 19 on the surface of the second face material 3, the second face material 3 can be pressed from the surface side, so that the second face material 3 may fall off due to shrinkage during ignition. Warpage is easily suppressed, and the fire resistance of the steel-framed outer wall fireproof structure is further improved. The place where the metal auxiliary material 19 is provided is appropriately selected, and may be, for example, near the abutting portion 9 between the lateral sides of the surfaces of the second face materials 31 and 32. Since the abutting portion 9 between the side surfaces of the second face material 3 may shrink or warp when the heat is strong, the metal auxiliary material 19 suppresses the second face material 3 from falling off. be able to. The size of the fixing portion 191 is appropriately set according to the size of the second face material 3 and the outer wall material 5.

As shown in FIGS. 12A and 12B, the metal auxiliary material 19 preferably includes a fixing portion 191 and a protruding portion 192. The protruding portion 192 has a shape that protrudes forward from the fixed portion 191. The protrusion 192 can improve the strength of the metal auxiliary material 19, and by using such a metal auxiliary material 19, the second face material 3 can be pressed more firmly. The protrusion height L of the protrusion 192 from the fixed portion 191 is equal to or less than the length between the second face material 3 and the outer wall material 5, and may be the same or shorter. When the protrusion height L of the protrusion 192 from the fixing portion 191 is the same as the length between the second face material 3 and the outer wall material 5, the front end portion 193 at the front of the protrusion 192 is the outer wall material. Contact with 5. In this case, the protruding portion 192 can hold the outer wall material 5 against a force in the thickness direction of the outer wall material 5 such as wind pressure, in addition to the effect of improving the strength of the metal auxiliary material 19. The cross-sectional shape of the protruding portion 192 of the metal auxiliary material 19 is appropriately selected, and is, for example, a C-shape having corners or an L-shape.

The metal auxiliary material 19 will be described with reference to FIGS. 12A and 12B, but the shape of the metal auxiliary material 19 is not limited to the shapes of FIGS. 12A and 12B. For example, the metal auxiliary material 19 may be formed from only the fixing portion 191 and may have a flat plate shape. Further, as shown in FIGS. 12A and 12B, the metal auxiliary material 19 may have a protrusion 192 at the lower end of the fixing portion 191 or may have a protruding portion 192 at the upper end of the fixing portion 191. A protruding portion 192 may be provided in the middle of the fixed portion 191 in the vertical direction. The vertical direction and the horizontal direction of the metal auxiliary material 19 mean the vertical direction and the horizontal direction of the metal auxiliary material 19 in the front view of the fireproof structure when the metal auxiliary material 19 is used.

The metal auxiliary material 19 of FIG. 12A will be described. The protrusion 192 is composed of a first piece 195 and a second piece 196. The first piece 195 is provided so as to project forward from the lower end of the fixing portion 191. The angle between the fixed portion 191 and the first piece 195 may be larger than 90 degrees and less than 180 degrees, and is appropriately selected. The second piece 196 projects rearward from the front end of the first piece 195. The angle between the first piece 195 and the second piece 196 may be less than 180 degrees and is appropriately selected. The rear end of the second piece 196 is on an extension of the fixed portion 191. That is, the rear end of the second piece 196 is in contact with the second face material 3. In FIG. 12A, the cross-sectional shape of the protruding portion 192 of the metal auxiliary material 19 is L-shaped, and the upper side 197, which is the joint between the first piece 195 and the second piece 196, is the front end portion 193 of the metal auxiliary material 19. Is. In FIG. 12A, the upper side 197 is in contact with the back surface of the outer wall material 5. The metal auxiliary material 19 may include an outward piece 194 extending parallel to the fixing portion 191 from the rear end of the second piece 196. The outward-facing piece 194 makes it easier to suppress the deformation of the second piece 196.

Next, the metal auxiliary material 19 of FIG. 12B will be described. The protrusion 192 is composed of a first piece 198, a second piece 199, and a third piece 200. The first piece 198 is provided so as to project substantially vertically forward from the lower end of the fixing portion 191. The second piece 199 projects downward from the front end of the first piece 198 substantially parallel to the fixing portion 191. The third piece 200 projects substantially vertically rearward from the lower end of the second piece 199. The rear end of the third piece 200 is on an extension of the fixed portion 191. That is, the rear end of the third piece 200 is in contact with the second face material 3. In FIG. 12B, the cross-sectional shape of the protruding portion 192 of the metal auxiliary material 19 is C-shaped, and the second piece 199 is the front end portion 193 of the metal auxiliary material 19. In FIG. 12B, the lengths of the first piece 198 and the third piece 200 are the same as the protrusion length L of the protrusion 192, and the second piece 199 is in contact with the back surface of the outer wall material 5. The metal auxiliary material 19 can be obtained by appropriately cutting or bending a metal plate such as a steel plate.

The metal auxiliary material 19 is preferably provided over the entire horizontal length of the fireproof structure of the present embodiment. As a result, the second face material 3 can be firmly pressed from the surface side. Further, it is preferable that the metal auxiliary material 19 is provided over a plurality of second face materials 3 adjacent to each other in the left-right direction. Since the metal auxiliary material 19 is provided across the plurality of second face materials 3, the plurality of second face materials 3 are stably pressed from the surface side by the metal auxiliary material 19. Therefore, it becomes easy to prevent the second face material 3 from falling off.

The length of the metal auxiliary material 19 in the left-right direction is appropriately set, but as shown in FIGS. 12A and 12B, the metal auxiliary material 19 is preferably long. When the long side of the outer wall material 5 is longer than that of the second face material 3, the length of the metal auxiliary material 19 in the left-right direction is preferably longer than the lateral sides 37 and 38 of the second face material 3, and the outer wall. It is more preferable that the lengths of the long sides 57 and 58 of the material 5 are the same. The same means that they do not have to be exactly the same, they may be slightly shorter, and they are substantially the same. For example, in the present embodiment, since the outer wall material 5 is constructed via the joiner 14, the metal auxiliary material 19 is shorter than the long sides 57 and 58 of the outer wall material 5 so as not to overlap with the joiner 14. Good. As the metal auxiliary material 19, a plurality of metal auxiliary materials 19 whose left and right lengths are shorter than half the length of the long side of the outer wall material 5 may be arranged.

The metal auxiliary material 19 is preferably a fastener 6. The fact that the metal auxiliary material 19 is the fastener 6 means that the metal auxiliary material 19 has a function of the fastener 6, that is, a function of locking and fixing the outer wall material 5. The fastener 6 and the metal auxiliary material 19 are preferably integrated. That is, it is preferable to use the support member 20 having the functions of both the fastener 6 and the metal auxiliary material 19. FIG. 13 shows an example of a wall fireproof structure using the support member 20, and FIG. 14 shows an example of the support member 20. The support member 20 includes a fixing portion 201 for fixing the support member 20 itself to the second face material 3, and a first holding portion 202 and a second holding portion 203 for holding the outer wall material 5. .. The first holding portion 202 and the second holding portion 203 have a shape protruding forward from the fixing portion 201. The protruding height L of the second holding portion 203 from the fixed portion 201 is substantially the same as the length between the second face material 3 and the outer wall material 5. As a result, a ventilation space can be formed between the outer wall material 5 and the second face material 3.

In the support member 20, the first holding portion 202 and the second holding portion 203 play the role of the fastener 6, and the fixing portion 201 plays the role of the metal auxiliary material 19. That is, the outer wall material 5 is locked and fixed by the first holding portion 202 of the support member 20, a ventilation space is formed by the second holding portion 203, and the second face material 3 is pressed from the surface side by the fixing portion 201. be able to. The sizes of the fixing portion 201, the first holding portion 202, and the second holding portion 203 are appropriately set according to the size, weight, and the like of the second face material 3 and the outer wall material 5. When the support member 20 is used, in the fixing portion 201, the upper end portion on the outer wall material 5 side is referred to as the upper end portion 201a, and the lower end portion on the outer wall material 5 side is referred to as the lower end portion 201b.

The support member 20 will be described with reference to FIG. 14, but the shape of the support member 20 is not limited to the shape of FIG. As shown in FIG. 14, the support member 20 includes a first holding portion 202 at the lower end of the fixing portion 201, and a second holding portion 203 at the upper end of the fixing portion 201. Alternatively, the first holding portion 202 may be provided at the upper end of the fixing portion 201, and the second holding portion 203 may be provided at the lower end of the fixing portion 201. Alternatively, the first holding portion 202 may be provided in the middle of the fixing portion 201 in the vertical direction, and the second holding portion 203 may be provided at the upper end or the lower end of the fixing portion 201.

The fixing portion 201 is appropriately provided with a fixing hole 210 for inserting the fixing member. The first holding portion 202 is composed of the first piece 221 and the second piece 222, the third piece 223, the fourth piece 224, the fifth piece 225, and the sixth piece 226. The sixth piece 226 is provided so as to project forward from the lower end portion 201b of the fixing portion 201. The fifth piece 225 is provided so as to project downward from the front end of the sixth piece 226. The fourth piece 224 is provided so as to project upward from the lower end of the fifth piece 225, and is provided parallel to the surface of the fifth piece 225. The first piece 221 is provided so as to project forward from the upper end of the fourth piece 224. The second piece 222 is provided so as to project from the front end of the first piece 221 toward the upper end portion 201a side of the fixing portion 201, and supports the upper outer wall material 5 attached to the front side of the upper end portion 201a (see FIG. 13). .. In FIG. 14, the second piece 222 is continuously provided over substantially the entire length of the first piece 221 in the left-right direction without being divided. The third piece 223 is provided so as to project downward from the front end of the first piece 221 and supports the lower outer wall material 5 attached to the front side of the fourth piece 224. In FIG. 14, the third piece 223 is divided into a plurality of pieces. The second piece 222 may be divided and provided in the same manner as the third piece 223. Further, the third piece 223 may be continuously provided like the second piece 222. The fourth piece 224 is in contact with the back surface of the lower outer wall material 5 when the support member 20 is used, and supports the lower outer wall material 5 together with the third piece 223 (see FIG. 13). The rear end of the first piece 221 may be connected to the lower end portion 201b of the fixed portion 201, and the first piece 221 and the sixth piece 226 are continuously integrated into one flat plate. The fourth piece 224 may protrude from the lower surface. The fourth piece 224 and the fifth piece 225 may also be an integrated flat plate.

In FIG. 14, the second holding portion 203 is composed of the first piece 231, the second piece 232, and the third piece 233. The first piece 231 of the second holding portion 203 has a length shorter than the combined protrusion length of the first piece 221 and the sixth piece 226 of the first holding portion 202 from the upper end of the fixing portion 201. It is provided so as to project forward. The first piece 231 of the second holding portion 203 can have substantially the same protruding length as the sixth piece 226 of the first holding portion 202. That is, the first piece 231 is provided so as to project forward from the upper end portion 201a of the fixing portion 201. The second piece 232 projects upward from the front end of the first piece 231. The third piece 233 projects rearward from the upper end of the second piece 232. In FIG. 14, the lengths of the first piece 231 and the third piece 233 are the same as the protruding length L of the second holding portion 203. The second piece 232 is in contact with the back surface of the outer wall material 5, a ventilation space is formed between the outer wall material 5 and the second face material 3, and the outer wall material 5 is subjected to a force in the thickness direction of the outer wall material 5. Can be supported (see FIG. 13). The support member 20 may include an outward piece 234 extending in parallel with the fixing portion 201 from the rear end of the third piece 233. The outward-facing piece 234 makes it easier to suppress the deformation of the third piece 233.

The support member 20 can be obtained by appropriately cutting or bending a metal plate such as a steel plate. In FIG. 14, for example, in the first holding portion 202, the sixth piece 226 can be formed by bending the fixing portion 201, and the fifth piece 225 can be formed by bending the sixth piece 226. The four pieces 224 can be formed by bending the fifth piece 225, the first piece 221 can be formed by bending the fourth piece 224, and the second piece 222 and the third piece 223 can be formed by bending the first piece 221. Can be formed by cutting up a part of. Further, in the second holding portion 203, the first piece 231 and the second piece 232 and the third piece 233 can be formed by bending a part of the fixing portion 201. By using the support member 20 in which the fastener 6 and the metal auxiliary material 19 are integrated, the construction is facilitated, and it is possible to obtain the functions of both the fastener 6 and the metal auxiliary material 19 with one member. It is more efficient and preferable because it can be done. The shape and size of the support member 20 are appropriately selected.

The length of the support member 20 in the left-right direction is appropriately set, but as shown in FIG. 14, the support member 20 is preferably long. When the long side of the outer wall material 5 is longer than that of the second face material 3, the length of the support member 20 in the left-right direction is preferably longer than the lateral sides 37 and 38 of the second face material 3, and the outer wall material 5 It is more preferable that the lengths of the long sides 57 and 58 of the above are substantially the same. Approximately the same means that they do not have to be exactly the same, but may be slightly shorter. For example, the support member 20 may be shorter than the long sides 57 and 58 of the outer wall material 5 so as not to overlap with the joiner 14. As a result, the second face material 3 can be pressed more stably from the surface side. As the support member 20, a plurality of support members 20 whose left and right lengths are shorter than half the length of the long side of the outer wall material 5 may be arranged.

Further, the shape of the support member 20 is not limited to the above. For example, the support member 20 may have a shape as in the modified example of the support member 20 shown in FIGS. 15A, 15B, and 15C.

The support member 20 includes a first holding portion 202 at the lower end of the fixing portion 201, and a second holding portion 203 at the upper end of the fixing portion 201 (see FIG. 15A).

The fixing portion 201 is appropriately provided with a fixing hole 210 for inserting the fixing member (see FIGS. 15A and 15B).

As shown in FIG. 15A, the first holding portion 202 is composed of the first piece 221 and the second piece 222, the third piece 223, the fourth piece 224, and the sixth piece 226.

The sixth piece 226 projects forward from the lower end portion 201b of the fixing portion 201. The sixth piece 226 is provided with a plurality of ventilation holes 212 (see FIGS. 15A and 15C). The shape of the vent 212 is, for example, an ellipse.

The fourth piece 224 projects upward from the front end of the sixth piece 226.

The first piece 221 projects forward from the upper end of the fourth piece 224.

The second piece 222 projects obliquely upward from the front end of the first piece 221.

The third piece 223 protrudes forward from the front end of the first piece 221 and the front end thereof is bent downward.

In the support member 20, the second piece 222 and the third piece 223 are provided alternately side by side at the front end of the first piece 221 (see FIGS. 15A, 15B, and 15C). That is, the third piece 223 is provided on both sides of the second piece 222 at the front end of the first piece 221.

As shown in FIG. 15A, the second holding portion 203 is composed of the first piece 231, the second piece 232, and the third piece 233.

The protrusion length of the first piece 231 protruding forward from the upper end portion 201a of the fixing portion 201 is substantially the same as the protrusion length of the sixth piece 226 of the first holding portion 202. .. .. The first piece 231 is provided with a plurality of ventilation holes 212 (see FIG. 15A). The shape of the ventilation hole 212 is, for example, an ellipse.

The second piece 232 projects upward from the front end of the first piece 231.

The third piece 233 projects rearward from the upper end of the second piece 232. The protruding length of the third piece 233 is shorter than the protruding length of the first piece 231.

Subsequently, an example of the structure of the outer wall 101 on which the support member 20 shown in FIG. 15 is installed will be described with reference to FIG.

As shown in FIG. 16, a fixing member such as a screw is passed through the fixing hole 210 of the fixing portion 201 and the moisture permeable waterproof sheet 4, the second face material 3, and the first face material 2. The support member 20 is fixed on the second face material 3 by inserting the steel frame 1 up to the steel frame 1.

The second piece 222 of the first holding portion 202 supports the upper outer wall material 5 (see FIG. 16).

The bent portion of the third piece 223 of the first holding portion 202 and the fourth piece 224 of the first holding portion 202 sandwich and hold the lower outer wall material 5 (see FIG. 16).

The second piece 232 of the second holding portion 203 is in contact with the back surface of the upper outer wall material 5, and the second piece 232 is connected to the fixing portion 201 via the first piece 231. Further, the fourth piece 224 of the second holding portion 202 is in contact with the back surface of the lower outer wall material 5, and the fourth piece 224 is connected to the fixing portion 201 via the sixth piece 226. Therefore, as shown in FIG. 16, a ventilation space is formed between the upper outer wall material 5 and the lower outer wall 5 and the second face material 3.

Further, the sixth piece 226 of the first holding portion 202 is provided with a ventilation hole 212, and the first piece 231 of the second holding portion 203 is provided with a ventilation hole 211. Air can pass through the ventilation holes 212 and the ventilation holes 211. Further, since the protruding length of the third piece 233 of the second holding portion 203 is shorter than the protruding length of the first piece 231, the air flow through the ventilation hole 211 provided in the first piece 231 is blocked. Hard to get rid of. Therefore, in the outer wall 101 shown in FIG. 16, by installing the support member 20 shown in FIG. 16, it is possible to sufficiently secure the air permeability of the ventilation space between the outer wall material 5 and the second face material 3. it can.

Hereinafter, the fireproof structure of the present embodiment will be described in detail with reference to FIGS. 17 and 18.

In the fireproof structure of the present embodiment, the pillar 100 is provided on the indoor side of the outer wall 101. Specifically, a pillar 100 is provided on the indoor side of the face material 4. More specifically, the pillar 100 is provided on the indoor side of the first face material 2 and the steel frame 1 of the face material 4. That is, in the fireproof structure of the present embodiment, there is a space between the pillar 100 and the first face material 2. The pillar 100 is a structural material of a building and is a vertically long member. The material and cross-sectional shape of the pillar 100 are not particularly limited, but are, for example, made of metal and have a rectangular cross section. The pillar 100 of this embodiment is a square copper tube. The pillar 100 is not limited to the square copper pipe, and may be, for example, a known steel material such as C-shaped steel or H-shaped steel.

In the fireproof structure of the present embodiment, two vertically long backing materials 103 are provided on the indoor side surface of the first face material 2. In the present embodiment, two backing members 103 are provided on the indoor side surface of the first face member 2 at a portion facing the pillar 100. The backing material 103 has, for example, a rectangular cross section. The backing material 103 is preferably made of a material having heat resistance, for example, a rock wool plate is preferable. The backing material 103 is fixed to the first face material 2 by a fixing member. Fixing members include, for example, adhesives, screws, nails, and screws. In the fireproof structure of the present embodiment, the steel frame 1 is provided between the two backing materials 103. In this embodiment, the case where the backing material is used will be described, but the backing material may be used as needed.

In the fireproof structure of the present embodiment, the fireproof covering material is held from the surface of the pillar 100 which is not opposed to the first face material 2 and is located substantially vertically to the vicinity of the back surface of the first face material 2. Means 106 are provided. Specifically, the fireproof coating material holding means 106 is provided from one backing material 103 to the pillar 100, and the fireproof covering material holding means 106 is provided from the other backing material 103 to the pillar 100. In the present embodiment, since the fireproof covering material holding means 106 is fixed to the backing material 103 provided on the back surface of the first face material 2, the fireproof covering material holding means 106 is attached to the back surface of the first face material 2. Not reached. That is, the fireproof coating material holding means 106 can be provided without being directly fixed to the back surface of the first face material 2. The refractory coating material holding means 106 is, for example, a metal mesh-like member. As the fireproof coating material holding means 106, for example, a known member such as a wire lath or an expanded metal can be used. In the present embodiment, the refractory covering material holding means 106 is fixed to the backing material 103 by a known fixing member such as a stapler or a pin. Further, the refractory covering material holding means 106 is fixed to the pillar 100 by welding. Further, in the present embodiment, a rod-shaped strong bone 109 is provided between the backing material 103 and the column 100 and the refractory covering material holding means 106. As a result, the refractory covering material holding means 106 can be strongly stretched.

In the fireproof structure of the present embodiment, the outer surface of the pillar 100 except for the surface facing the space 104 between the pillar 100 and the first face material 2 is covered with the fireproof covering material 102, and the space 104 is closed. Is provided with a fireproof coating material 102. In particular, in the present embodiment, the fireproof covering material 102 is provided along the fireproof covering material holding means 106. The fireproof coating material 102 is a member having fire resistance. Examples of the fireproof coating material 102 include rock wool, an inorganic spray material, an inorganic mat material, an inorganic sheet material, and an inorganic board material.

In this embodiment, the fireproof structure using the fireproof covering material holding means 106, the force bone 109, etc. is described, but the present invention is not limited to this, and when the fireproof covering material 102 itself has independence, it is fireproof. It is not necessary to use the covering material holding means 106, the refractory 109, and the like.

Further, in the fireproof structure of the present embodiment, the heat insulating material 105 is provided on the indoor side of the first face material 2. In the present embodiment, the heat insulating material 105 is provided on the indoor side of the backing material 103 inside the space 104, and the heat insulating material 105 is provided between the steel frame 1 and the refractory covering material holding means 106 on the outside of the space 104. Has been done. The heat insulating material 105 is, for example, rock wool or glass wool. In the present embodiment, the heat insulating material 105 is provided on both the inside and the outside of the space 104 on the indoor side of the first face material 2, but the present invention is not limited to this. For example, the heat insulating material 105 may be provided only on the outside of the space 104, the heat insulating material 105 may be provided only on the inside of the space 104, or the heat insulating material 105 may not be provided on both the inside and outside of the space 104. ..

The fireproof structure of the present embodiment has the following effects by providing the above configuration.

In the fireproof structure of the present embodiment, since the face material such as gypsum board is not provided on the indoor side of the steel frame 1, the space between the outer wall 101 and the pillar 100 is higher than that in the case where the face material is provided on the indoor side of the steel frame 1. The space is large. Therefore, it is easy to install the fireproof coating material 102 on the pillar 100.

In the present embodiment, the outer surface of the pillar 100 excluding the surface facing the space 104 is covered with the fireproof coating material 102. Further, a fireproof coating material 102 is provided so as to close the space 104. As a result, the fire resistance of the pillar 100 can be ensured, and the fireproof coating material can be easily applied as compared with the case where all the surfaces of the pillar 100 are covered with the fireproof coating material.

Further, since the space 104 between the pillar 100 and the first face material 2 is large, the heat insulating material 105 can be provided on the indoor side of the first face material 2. With this heat insulating material 105, the heat insulating property of the building can be further improved.

In the fireproof structure of the present embodiment, as shown in FIG. 17, one steel frame 1 is provided between the two backing materials 103, but the present invention is not limited to this. For example, as shown in FIG. 19A, the steel frame 1 may not be provided between the two backing materials 103. Further, as shown in FIG. 19B, two adjacent steel frames 1 may be provided between the two backing materials 103.

The fireproof structure of the present embodiment can also be applied to the outside corner of a building. The protruding corner is the corner formed by the encounter of two outer walls in a building. Therefore, as shown in FIG. 20, the protruding corner of the present embodiment includes a first outer wall 107 and a second outer wall 108 adjacent in a direction intersecting the first outer wall 107. Further, an L-shaped corner outer wall material 50 is provided at a corner where the first outer wall 107 and the second outer wall 108 meet. The corner outer wall material 50 is abutted against the first outer wall 107 and the second outer wall 108 via the joiner 14 (see FIG. 20). A sealing 17 is provided at the abutting portion between the first outer wall 107 and the corner outer wall material 50, and at the abutting portion between the second outer wall 108 and the corner outer wall material 50. The corner outer wall material 50 is fixed to the second face material 3 via the fastener 6. Further, in the present embodiment, two adjacent steel frames 1 are provided on the indoor side of the corner where the first outer wall 107 and the second outer wall 108 meet.

As shown in FIG. 20, in the fireproof structure at the protruding corner, the pillar 100 faces the first face material 2 of the first outer wall 107 and the first face material 2 of the second outer wall 108. One backing material 103 is fixed to a portion of the first outer wall 107 on the indoor side surface of the first face material 2 facing the pillar 100. Further, the other backing material 103 is fixed to the portion of the second outer wall 108 facing the pillar 100 on the indoor side surface of the first face material 2. That is, the two backing members 103 face different surfaces of the pillar 100, respectively.

Even in the fireproof structure at the protruding corner, the fireproof covering material is held from the surface of the pillar 100 which is not opposed to the first face material 2 and is located substantially vertically to the vicinity of the back surface of the first face material 2. Means 106 are provided. Specifically, as shown in FIG. 20, the fireproof coating material holding means 106 is provided from one backing material 103 to the pillar 100, and the fireproof covering material holding means 106 is provided from the other backing material 103 to the pillar 100. Has been done. Further, a rod-shaped force bone 109 is provided between the backing material 103 and the column 100 and the fireproof coating material holding means 106.

In the fireproof structure of the protruding corner, the outer surface of the pillar 100 excluding the surface facing the space 104 between the pillar 100 and the first face material 2 of the first outer wall 107 and the first face material 2 of the second outer wall 108. Is covered with the fireproof coating material 102, and the fireproof coating material 102 is provided so as to close the space 104. In particular, in the present embodiment, the fireproof coating material 102 is provided along the fireproof covering material holding means 106 (see FIG. 20).

Since the pillar 100 located at the protruding corner faces the first outer wall 107 and the second outer wall 108, a gypsum board or the like is provided on the indoor side of the steel frame 1 of the first outer wall 107 and the second outer wall 108. If so, it is difficult to apply a fireproof coating material to the pillar 100. However, in the present embodiment, gypsum board or the like is not provided on the indoor side of the steel frame 1 in both the first outer wall 107 and the second outer wall 108 constituting the protruding corner. Therefore, the space between the pillar 100 and the first outer wall 107 and the second outer wall 108 is large, which makes it easy to install the fireproof coating material 102 on the pillar 100.

In the present embodiment, the outer surface of the pillar 100 excluding the surface facing the space 104 is covered with the fireproof covering material 102, and the fireproof covering material 102 is provided so as to block the space 104. As a result, the fire resistance of the pillar 100 located at the protruding corner can be ensured, and the fireproof coating material can be easily applied as compared with the case where all the surfaces of the pillar 100 located at the protruding corner are covered with the fireproof coating material.

Further, also in the fireproof structure of the protruding corner, the heat insulating material 105 may or may not be provided on the indoor side of the first face material 2.

1 Steel frame 2 First face material 25, 26 Vertical side 27, 28 Horizontal side 3 Second face material 35, 36 Vertical side 37, 38 Horizontal side 4 Face material 5 Outer wall material 6 Fastener 100 Pillar 102 Fireproof coating material 104 Space 105 Insulation material 106 Fireproof coating material holding means 107 First outer wall 108 Second outer wall

Claims (7)

It is a fireproof structure including an outer wall and a pillar provided on the indoor side of the outer wall.
The outer wall
Multiple vertically long steel frames arranged side by side with a predetermined interval,
A fire-resistant face material provided on the outdoor side of the steel frame along the plurality of steel frames,
The outer wall material provided on the outdoor side of the face material and
With
The outer surface of the pillar except for the surface facing the space between the pillar and the face material is covered with a fireproof coating material, and
A fireproof coating material is provided so as to block the space between the pillar and the face material.
A fastener for fastening the outer wall material is fixed to the steel frame located in the space closed by the fireproof covering material.
Fireproof structure. The steel frame is a lightweight steel frame,
The face material is a first face material that is rectangular in front view and is provided on the outdoor side of the steel frame, and a second face material that is rectangular in front view and is provided on the outdoor side of the first face material. And with
The outer wall material is rectangular when viewed from the front.
The two vertical sides of the first face material are on the outdoor side of the steel frame.
The two vertical sides of the second face material are on the outdoor side of the steel frame different from the steel frame in which the vertical side of the first face material is located.
The two horizontal sides of the second face material and the two horizontal sides of the first face material are displaced in the vertical direction.
The two long sides of the outer wall material constructed in the horizontally long direction do not overlap with the two side sides of the first face material and the two side sides of the second face material in the thickness direction, and the fastening is performed. It is fixed to the steel frame via a tool,
The fireproof structure according to claim 1. The first face material and the second face material are gypsum boards.
The fireproof structure according to claim 2. At least the second face material is a calcium silicate plate.
The fireproof structure according to claim 2. The outer wall includes a first outer wall forming a protruding corner and a second outer wall adjacent to the first outer wall in a direction intersecting with the first outer wall.
The pillar faces the first outer wall and the second outer wall.
The outer surface of the pillar, excluding the surface facing the space between the pillar and the face material on the first outer wall and the face material on the second outer wall, is covered with the fireproof coating material, and is also covered with the fireproof coating material.
The fireproof coating material is provided so as to close the space between the pillar, the face material on the first outer wall, and the face material on the second outer wall.
The fireproof structure according to any one of claims 1 to 4. A fireproof coating material holding means is provided from the surface of the pillar which is not opposed to the face material and is located substantially perpendicularly to the vicinity of the back surface of the face material.
The fireproof coating material is provided on the fireproof coating material holding means.
The fireproof structure according to any one of claims 1 to 5. A heat insulating material is provided on the indoor side of the face material.
The fireproof structure according to any one of claims 1 to 6.

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