Eaves structure

Abstract

To provide an eave structure capable of improving fire resistance.SOLUTION: An eave structure 1 includes an eaves material 30 and a finishing material 80 placed on a surface of the eaves material 30, in which a projection length L3 of the finishing material 80 from the eaves material 30 is 18 mm or more and 60 mm or less. Multiple finishing materials 80 are arranged in a predetermined direction, in which a length in a predetermined direction of a gap between the finishing materials 80 (a blinding width) L4 is 50 mm or less. The eave structure 1 includes: a ceiling joist 10 with eaves material 30 to be fixed thereto; and a fastening material 90 that fastens the finishing material 80 to the eaves material 30 by being hammered into the joists 10 from the outside of the finishing material 80.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to technology for the eaves structure of a building. [Background technology]

[0002] Conventionally, technology for building eaves structures has been publicly known, as described in Patent Document 1, for example.

[0003] Patent Document 1 describes an eaves structure in which the eaves base side of the eaves soffit board is supported by a joist or exterior wall, and the eaves tip side of the eaves soffit board is supported by a joist or fascia board base.

[0004] Such eaves structures must pass prescribed fire resistance tests, and improvements in fire resistance are desired. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Publication No. 2020-125647 Summary of the Invention [Problem to be solved by the invention]

[0006] The present invention has been made in view of the above circumstances, and the problem to be solved by the present invention is to provide an eaves structure that can improve fire resistance. [Means for solving the problem]

[0007] The problem to be solved by the present invention is as described above, and the means for solving this problem will now be described.

[0008] That is, in claim 1, the present invention comprises an eave soffit material and a finishing material provided on the surface of the eave soffit material, and the protruding length of the finishing material from the eave soffit material is 18 mm or more and 60 mm or less. The finishing material is provided in a plurality of layers including a plurality of first layer finishing materials provided so as to contact the surface of the eaves soffit material, and a plurality of second layer finishing materials provided so as to contact the surface of the first layer finishing materials, and the plurality of first layer finishing materials are arranged so as to generate gaps between adjacent first layer finishing materials, and the plurality of second layer finishing materials are arranged so as to span the gaps and close the gaps. It is something.

[0009] In claim 2, a plurality of the finishing materials are provided so as to be aligned in a predetermined direction, and the length of the gap between the finishing materials in the predetermined direction is 50 mm or less.

[0010] In claim 3, the method comprises a siding to which the eaves soffit material is fixed, and a fastening material that is driven into the siding from the outside of the finishing material to fasten the finishing material to the eaves soffit material.

[0011] In claim 4, the building is provided with a heat insulating material that is provided so as to double-cover the joist.

[0012] In claim 5, the finishing material is made of wood, and the fastening material is made of metal.

[0013] In claim 6 , complex The total thickness of the finishing material of the several layers is 18 mm or more and 60 mm or less. [Effects of the Invention]

[0014] The present invention has the following effects.

[0015] According to claim 1, the fire resistance can be improved.

[0016] According to claim 2, the fire resistance can be further improved.

[0017] According to claim 3, the fire resistance can be further improved.

[0018] According to claim 4, the fire resistance can be further improved.

[0019] According to claim 5, the fire resistance can be further improved.

[0020] According to claim 6, the design can be further improved while the fire resistance can be improved. [Brief explanation of the drawings]

[0021] [Figure 1] FIG. 1 is a side view showing an eaves structure according to one embodiment of the present invention. [Figure 2] FIG. 1 is a plan view showing an eaves structure according to one embodiment of the present invention. [Figure 3] FIG. 2 is a bottom view showing the eaves structure according to one embodiment of the present invention. [Figure 4] (a) Plan view showing the arrangement of the lower heat insulating material. (a) Plan view showing the arrangement of the upper heat insulating material. [Figure 5] Schematic front views showing the application patterns of finishing materials, including (a) butt joints, (b) open joints, (c) butt joints + battens, and (d) Yamato-bari. DETAILED DESCRIPTION OF THE INVENTION

[0022] Hereinafter, an eaves structure 1 according to one embodiment of the present invention will be described with reference to Figures 1 to 4. In Figure 2, roof rafters 3, heat insulating material 70, etc. are omitted from the illustration in order to clearly show the configuration of the main parts.

[0023] The eaves structure 1 shown in Figures 1 to 3 is the structure behind (under) the eaves 100 of a building. The eaves 100 are the parts of the roof of a building that protrude outward from the exterior walls 2, and serve to protect the building by blocking rain, snow, and sunlight.

[0024] In the following, in the eaves soffit structure 1, the side facing the exterior wall 2 is referred to as the "eaves base side," and the opposite side is referred to as the "eaves tip side." The direction facing the eaves base side (eaves base direction) and the direction facing the eaves tip side (eaves tip direction) are collectively referred to as the "eaves extension direction." The direction perpendicular to the eaves extension direction in a plan view (left-right direction) is sometimes referred to as the "eaves width direction."

[0025] The eaves projection dimension L1 of the eaves soffit structure 1 (the length of projection forward from the exterior wall 2) can be any value, but in the case of a wall-fronted structure, it is preferable to set it to 113 mm or more and 2000 mm or less, and in the case of an eaves-fronted structure, it is preferable to set it to 88 mm or more and 2000 mm or less. The eaves projection dimension L1 of the eaves soffit structure 1 in this embodiment is set to 1000 mm. Furthermore, the eaves width dimension L2 (the length in the eaves width direction) of the eaves soffit structure 1 can be set to any value. The eaves width dimension L2 of the eaves soffit structure 1 in this embodiment is set to 1920 mm.

[0026] The eaves structure 1 according to this embodiment has the following structure for the purpose of improving fire resistance. The eaves structure 1 includes a rafter 10, a vertical rafter 20, an eaves material 30, a fascia base 40, a fascia 50, a ventilation material 60, a heat insulating material 70, a finishing material 80, and a fastening material 90.

[0027] The rafter 10 shown in Figures 1 and 2 serves as a base for attaching the eaves soffit material 30 and finishing material 80, which will be described later. The rafter 10 is made of wood. The rafter 10 is formed (from square timber) in the shape of a rectangular rod in side cross section. The rafter 10 is provided with its longitudinal direction facing the eaves width direction (left and right direction). Multiple rafters 10 are provided at intervals in the direction of the eaves. In this embodiment, three rafters 10 are provided at intervals of 500 mm in the direction of the eaves. The rafters 10 are fixed to the roof rafters 3 via appropriate members. Hereinafter, the rafter 10 closest to the base of the eaves will be referred to as rafter 10a, the rafter 10 in the center of the eaves direction will be referred to as rafter 10b, and the rafter 10 closest to the tip of the eaves will be referred to as rafter 10c.

[0028] The vertical siding 20 shown in Figure 2 supports the siding 10. The vertical siding 20 is made of wood. The vertical siding 20 is formed in the shape of a rectangular rod (made of square timber) when viewed in front cross section. The vertical siding 20 is provided with its longitudinal direction facing the eaves. In other words, the vertical siding 20 is provided so as to be perpendicular to the siding 10. A pair of vertical sidings 20 is provided in front of and behind the siding 10b. A plurality of vertical sidings 20 are provided at intervals in the eaves width direction. In this embodiment, five vertical sidings 20 are provided in front of the siding 10b and five are provided at the rear of the siding 10b at intervals of 455 mm in the eaves width direction.

[0029] The eaves soffit material 30 shown in Figures 1 to 3 constitutes the lower part (eaves soffit) of the eaves soffit structure 1. The eaves soffit material 30 is formed into a rectangular plate shape when viewed from above. The eaves soffit material 30 is formed from any material. In this embodiment, the eaves soffit material 30 is formed from calcium silicate board (fiber-mixed calcium silicate board). The thickness of the eaves soffit material 30 can be any thickness, but is preferably 12 mm or more. The eaves soffit material 30 is provided below the joist 10 and fastened to the joist 10 with screws, nails, etc. The eaves soffit material 30 is provided so as to cover the gap between the joist 10 and the vertical joist 20.

[0030] The fascia board base 40 shown in Figures 1 and 2 serves as the base for the fascia board 50 described below. The fascia board base 40 is formed in the shape of a plate with its longitudinal direction oriented in the eaves width direction. The fascia board base 40 is fixed to the eaves-side tip of the rafter 3 with screws, nails, etc.

[0031] The fascia board 50 shown in Figures 1 and 2 is intended to hide the eaves-side tip of the rafter 3. The fascia board 50 is formed in the shape of a plate with its longitudinal direction oriented in the eaves width direction. The fascia board 50 is attached to the eaves-side end of the eaves soffit structure 1. More specifically, the fascia board 50 is provided on the eaves side of the fascia board base 40 and is fixed to the fascia board base 40.

[0032] 1 and 3 ventilates the interior space of the eaves soffit structure 1. The ventilation material 60 is formed to have a ventilation opening 60a (see FIG. 3). The ventilation material 60 is attached between the eaves soffit material 30 and the exterior wall 2.

[0033] The heat insulating material 70 shown in Figures 1 and 4 insulates the internal space of the eaves soffit structure 1. The heat insulating material 70 is made of glass wool or rock wool. The heat insulating material 70 is provided in the internal space of the eaves soffit structure 1. The heat insulating material 70 is made up of two layers of heat insulating material. Specifically, the heat insulating material 70 is made up of a lower heat insulating material 71 and an upper heat insulating material 72.

[0034] The lower insulation material 71 is the lower of the two layers of insulation material. The lower insulation material 71 is arranged in a space partitioned by adjacent vertical joists 20, with its longitudinal direction generally facing the eaves (see FIG. 4(a)). The lower insulation material 71 is composed of an eaves-side insulation material 71a arranged on the eaves-end side and an eaves-base insulation material 71b arranged on the eaves-base side.

[0035] The eaves-side insulating material 71a is positioned so that its eaves-side end is located closer to the eaves than the joist 10b. The eaves-side insulating material 71a is positioned so that its eaves-side portion covers the rear side and top surface of the joist 10c. More specifically, the eaves-side insulating material 71a is positioned so that its eaves-side portion abuts the rear side and top surface of the joist 10c with almost no gap.

[0036] The eaves-side insulating material 71b is positioned so that its eaves-side end is located closer to the eaves edge than the joist 10a. The eaves-side insulating material 71b is positioned so that its eaves-edge side portion covers the front, top, and rear sides of the joist 10b. More specifically, the eaves-side insulating material 71b is positioned so that its eaves-edge side portion abuts the front, top, and rear (three sides) of the joist 10b with almost no gaps. The eaves-edge side end of the eaves-side insulating material 71b is positioned so that it contacts the eaves-side end of the eaves-edge side insulating material 71a. More specifically, the eaves-side insulating material 71b and the eaves-edge side insulating material 71a contact each other on the eaves soffit side, approximately one joist 10b's width away from the joist 10b.

[0037] The upper insulating material 72 is the upper of the two layers of insulating material. The upper insulating material 72 is arranged so as to cover the lower insulating material 71 from above. The upper insulating material 72 is arranged so that its longitudinal direction is generally oriented in the eaves width direction (see Figure 4(b)). The upper insulating material 72 is arranged so as to straddle (cover) the gaps between adjacent eaves-side insulating materials 71a and between adjacent eaves-base-side insulating materials 71b. In addition, the upper insulating material 72 is arranged so as to straddle (cover) the portions where the eaves-side insulating material 71a and the eaves-base-side insulating material 71b face each other (the portions where they contact each other).

[0038] The heat insulating material 70 configured in this manner is provided so as to occupy most of the interior space of the eaves soffit structure 1. This allows the interior space of the eaves soffit structure 1 to be insulated, and ultimately makes it possible to suppress heat transfer to the exterior wall 2.

[0039] Furthermore, by arranging the lower insulation material 71 so that it covers the side and top surfaces of the joist 10 (abuts against the side and top surfaces), it is possible to suppress the transfer of heat to the joist 10. Therefore, for example, if the soffit structure 1 is heated from the surroundings due to a fire, it is possible to suppress carbonization of the joist 10 (slow down the progression of carbonization). This makes it possible to suppress the soffit material 30 fixed to the joist 10 from falling.

[0040] Furthermore, by using two layers of insulation 70, the joist 10 can be doubly covered with insulation 70. In this way, it is possible to fill the internal space of the eaves structure 1 (while ensuring the overall thickness of the insulation 70) while reducing the thickness of the lower insulation 71. This makes it easier to make the lower insulation 71 conform to the shape of the joist 10. Therefore, the transfer of heat to the joist 10 can be further suppressed.

[0041] Furthermore, by providing an upper insulating material 72 in addition to the lower insulating material 71, the insulating effect can be enhanced. This can improve the fire resistance of the eaves soffit structure 1. Also, the upper insulating material 72 is provided to cover the area where the eaves-side insulating material 71a and the eaves-base-side insulating material 71b face each other, so it can block heat escaping between the eaves-side insulating material 71a and the eaves-base-side insulating material 71b. Also, the upper insulating material 72 is provided to cover the gaps between adjacent eaves-side insulating materials 71a and the gaps between adjacent eaves-base-side insulating materials 71b, so it can block heat escaping from these gaps.

[0042] Furthermore, by dividing the lower insulating material 71 into eaves-side insulating material 71a and eaves-base-side insulating material 71b, the workability when assembling the insulating material 70 can be improved. Also, for example, when attempting to arrange one insulating material to cover two (or more) joists 10, it is relatively difficult to arrange it to cover one joist 10 while also covering the other joist 10. Therefore, by arranging the eaves-side insulating material 71a to cover the joist 10c and the eaves-base-side insulating material 71b to cover the joist 10b, each joist 10 can be appropriately covered.

[0043] Furthermore, because the portion of the eaves-side insulation 71b that straddles the joist 10b is bent, a force is applied to this portion to restore its original shape. If such a location (i.e., a location too close to the joist 10b) is used as the contact point between the eaves-side insulation 71a and the eaves-side insulation 71b, the portion that abuts the three sides of the joist without any gaps may curl up. On the other hand, if the contact point between the eaves-side insulation 71a and the eaves-side insulation 71b is used as the contact point too far from the joist 10b, it is difficult to ensure that the contact points abut the three sides of the joist 10b without any gaps. Furthermore, if the eaves-side insulating material 71a and the eaves-side insulating material 71b were to be in contact with each other closer to the eaves than the joist 10b (i.e., if the eaves-side insulating material 71a were positioned so that it straddled the joist 10b), when the eaves-side insulating material 71b received a load toward the eaves, the portion of the eaves-side insulating material 71a that was in contact with the three sides of the joist without any gaps could be rolled up. Therefore, in this embodiment, the lower insulating material 71 is divided into the eaves-side insulating material 71a and the eaves-side insulating material 71b, and the portion where the eaves-side insulating material 71b and the eaves-side insulating material 71a contact each other is positioned closer to the eaves soffit than the joist 10b by about one joist 10b. This allows the lower insulating material 71 to be in contact with the three sides of the joist 10b without any gaps, thereby improving insulation.

[0044] The finishing material 80 shown in Figures 1 and 3 is intended to improve the design of the eaves soffit material 30 (decorative wood). The finishing material 80 is made of wood. The finishing material 80 is formed in the shape of a rod with a rectangular cross section (using a square timber). In this embodiment, the width of the finishing material 80 in the eaves width direction is 40 mm. The length of the finishing material 80 in the eaves overhang direction is 900 mm. The finishing material 80 is provided on the underside of the eaves soffit material 30. The finishing material 80 is provided with its longitudinal direction facing the eaves overhang direction. Multiple finishing materials 80 are provided at intervals in the eaves width direction. Paint is applied to the surface of the finishing material 80. This paint is made of acrylic resin, acrylic urethane resin, silicone resin, fluorine resin, inorganic resin, alkyd resin (polyester resin), urethane resin, oil-based (oil stain paint), wood protection (water-based paint), photocatalytic paint (titanium oxide), or a combination thereof. The dimensions and placement of the finishing material 80 will be described in detail later.

[0045] The fastening material 90 shown in Figures 1 and 3 is used to fasten (secure) the finishing material 80. Screws or nails can be used as the fastening material 90. The fastening material 90 is made of metal (for example, stainless steel, steel, or brass). The fastening material 90 penetrates the finishing material 80 from below and is fastened to the joist 10. The spacing between the fastening materials 90 in the eaves direction is about 500 mm. The length of the fastening material 90 is 25 mm or more.

[0046] When heated from below the eaves soffit structure 1, the thinner the thickness (length of protrusion from the eaves soffit material 30) L3 of the finishing material 80, the easier it is for heat to be transferred to the eaves soffit structure 1, resulting in a decrease in fire resistance. On the other hand, the thicker the thickness L3, the more difficult it is for heat to be transferred to the eaves soffit structure 1, resulting in an increase in fire resistance. However, if the finishing material 80 is too thick, the weight of the finishing material 80 increases the pull-out force of the fastening material 90. If the fastening material 90 is pulled out and the finishing material 80 falls, the fire resistance of the eaves soffit structure 1 will decrease. Taking this into consideration, the thickness L3 of the finishing material 80 is set to be 18 mm or more and 60 mm or less. The above-mentioned numerical value for the thickness L3 of the finishing material 80 may take into account tolerances, such as a tolerance of ±6 mm. Having a thickness L3 of 18 mm or more for the finishing material 80 makes it difficult for heat to be transferred to the eaves soffit structure 1. On the other hand, by setting the thickness L3 of the finishing material 80 to 60 mm or less, the generation of pull-out force of the fastening material 90 can be suppressed.

[0047] Furthermore, the larger the length of the gap between the finishing materials 80 in the eaves width direction (the direction in which the finishing materials 80 are lined up), i.e., the greater the openwork width L4, the easier it is for heat to be transferred through the gap to the eaves soffit structure 1, thereby reducing the fire resistance of the eaves soffit structure 1. Taking this into consideration, the openwork width L4 of the finishing material 80 is set to 50 mm or less. Note that the numerical value for the openwork width L4 of the finishing material 80 may take into account a tolerance, for example, a tolerance of ±5 mm. This makes it difficult for heat from below the eaves soffit structure 1 to be transferred to the eaves soffit material 30, etc., thereby improving the fire resistance of the eaves soffit structure 1.

[0048] Furthermore, the finishing material 80 is fastened to the eaves soffit material 30 by fastening materials 90 that are driven into the joist 10 from the outside of the finishing material 80. Therefore, when the eaves soffit structure 1 is heated from the top or side, the heat transferred to the joist 10 can be discharged to the outside via the fastening materials 90, thereby improving the fire resistance of the eaves soffit structure 1.

[0049] By attaching the finishing material 80 to the eaves soffit material 30 according to the above specifications, the design of the eaves soffit structure 1 can be improved while improving its fire resistance.

[0050] Hereinafter, examples of patterns for attaching the finishing material 80 will be described with reference to FIG.

[0051] The application pattern (arrangement) of the finishing materials 80 is not particularly limited and can be determined according to the design. For example, as shown in FIG. 5(a), the finishing materials 80 may be butted together without gaps (joints) between them (butt joint). As shown in FIG. 5(b), the finishing materials 80 may be butted together with gaps (joints) between them (open joint). As shown in FIG. 5(c), the first layer of finishing materials 80 may be butted together with no gaps (joints) between them, and the second layer may be butted together with gaps (joints) between them (butt joint + batten). As shown in FIG. 5(d), the first layer may be butted together with gaps (joints) between them, and the second layer may be butted together to close the gaps in the first layer and with gaps (joints) between them (Yamato-bari).

[0052] When the finishing material 80 is made up of two or more layers as shown in Figures 5(c) and 5(d), the total thickness L5 is set to 18 mm or more and 60 mm or less (±6 mm), thereby improving the fire resistance.

[0053] As described above, the eaves structure 1 according to this embodiment is Eaves material 30 and The finishing material 80 is provided on the surface of the eaves material 30, The length L3 of the finish material 80 projecting from the eaves material 30 is 18 mm or more and 60 mm or less.

[0054] This configuration can improve the fire resistance. Specifically, by making the protruding length L3 of the finishing material 80 18 mm or more, it is possible to make it difficult for heat to be transmitted to the eaves soffit structure 1. On the other hand, by making the protruding length L3 of the finishing material 80 60 mm or less, it is possible to suppress the generation of pull-out force of the fastening material 90. This makes it possible to improve the fire resistance performance of the eaves soffit structure 1.

[0055] In addition, the finishing material 80 is A plurality of them are provided so as to be lined up in a predetermined direction (eaves width direction), The length (openwork width) L4 of the gap between the finishing materials 80 in the predetermined direction is 50 mm or less.

[0056] This configuration can further improve the fire resistance. Specifically, since it is possible to suppress the penetration of heat through gaps between the finishing materials 80, it is possible to further improve the fire resistance of the eaves soffit structure 1.

[0057] In addition, the eaves structure 1 according to this embodiment is A joist 10 to which the eaves material 30 is fixed, A fastening material 90 that fastens the finishing material 80 to the eaves material 30 by being driven into the joist 10 from the outside of the finishing material 80; It is equipped with the following.

[0058] This configuration can further improve the fire resistance. Specifically, heat transferred to the joist 10 can be discharged to the outside through the fastening material 90, thereby further improving the fire resistance of the eaves structure 1.

[0059] In addition, the eaves structure 1 according to this embodiment is It is equipped with insulation material 70 (lower insulation material 71 and upper insulation material 72) that is arranged to double-cover the siding 10.

[0060] This configuration can further improve the fire resistance. Specifically, it is possible to reduce the thickness of the lower insulating material 71 while filling the internal space of the eaves soffit structure 1 (while ensuring the overall thickness of the insulating material 70), making it easier to make the lower insulating material 71 (and therefore the entire insulating material 70) conform to the shape of the eaves soffit 10. In this way, if the eaves soffit structure 1 is heated from the surroundings due to a fire, for example, the insulating material 70 can suppress the transfer of heat to the eaves soffit 10. This makes it possible to suppress carbonization of the eaves soffit 10 (slowing down the progression of carbonization), and ultimately to suppress the fall of the eaves soffit material 30.

[0061] In addition, in the eaves structure 1 according to this embodiment, The finishing material 80 is made of wood, The fastener 90 is made of metal.

[0062] By configuring it in this way, it is possible to further improve the fire resistance performance of the eaves soffit structure 1 in which the finishing material 80 is made of wood and the fastening material 90 is made of metal.

[0063] The finishing material 80 is provided in multiple layers, The total thickness L5 of the multiple layers of the finishing material 80 is 18 mm or more and 60 mm or less.

[0064] This configuration can improve the design and fire resistance.

[0065] As described above, the eaves structure 1 according to this embodiment is A joist 10 to which an eaves material 30 is fixed; A lower heat insulating material 71 (first heat insulating material) provided to cover the joist 10; an upper heat insulating material 72 (second heat insulating material) provided so as to cover the lower heat insulating material 71; It is equipped with the following.

[0066] This configuration can improve the fire resistance. Specifically, for example, when the eaves structure 1 is heated from the surroundings due to a fire or the like, the heat insulating material 70 can suppress the transfer of heat to the joists 10. Therefore, carbonization of the joists 10 can be suppressed (the progress of carbonization can be delayed), and thus the eaves structure 30 can be suppressed from falling. Furthermore, by forming the insulation material 70 into two layers, it is possible to reduce the thickness of the lower insulation material 71. This makes it easier to fit the lower insulation material 71 to the shape of the joist 10. This further reduces the transfer of heat to the joist 10. Furthermore, by providing the upper insulation material 72 in addition to the lower insulation material 71, the insulation effect can be improved. This improves the fire resistance of the eaves soffit structure 1.

[0067] The lower heat insulating material 71 is an eaves-side heat insulating material 71a arranged on the eaves side; an eaves-side heat insulating material 71b arranged on the eaves side; It is equipped with the following.

[0068] This configuration can improve the workability when incorporating the heat insulating material 70.

[0069] In addition, a plurality of the sills 10 are provided, The eaves-side insulating material 71a and the eaves-base-side insulating material 71b are each provided to cover different sidings 10 (sidings 10c, sidings 10b).

[0070] This configuration can further improve the fire resistance. Specifically, for example, when trying to arrange one insulation material to cover two (or more) joists 10, it is relatively difficult to arrange it to cover one joist 10 while also covering the other joist 10. Therefore, by arranging the eaves-side insulation material 71a to cover the joist 10c and the eaves-side insulation material 71b to cover the joist 10b, it is possible to ensure that each joist 10 is appropriately covered.

[0071] In addition, the upper heat insulating material 72 is The insulating material 71a on the eaves edge side and the insulating material 71b on the eaves base side are provided to cover the opposing portions.

[0072] This configuration can further improve the fire resistance. Specifically, the upper insulating material 72 can block heat escaping between the eaves-edge side insulating material 71a and the eaves-base side insulating material 71b.

[0073] In addition, the eaves side insulation material 71a and the eaves base side insulation material 71b are each divided into multiple pieces, and the upper insulation material 72 is arranged to cover the gaps between adjacent eaves side insulation materials 71a and the gaps between adjacent eaves base side insulation materials 71b.

[0074] This configuration can further improve the fire resistance. Specifically, the upper insulating material 72 can block heat escaping from gaps between the eaves-edge-side insulating materials 71a and gaps between adjacent eaves-base-side insulating materials 71b.

[0075] Although the embodiment of the present invention has been described above, the present invention is not limited to the above configuration, and various modifications are possible within the scope of the invention described in the claims.

[0076] For example, in this embodiment, the finishing material 80 is arranged so that its longitudinal direction faces the eaves, but the orientation of the finishing material 80 is not limited to this and can be in any direction, for example, it may be arranged so that its longitudinal direction faces the eaves width direction.

[0077] Furthermore, although the siding 10 is fixed directly to the rafters 3, it may also be fixed via a hanging beam.

[0078] Furthermore, in this embodiment, the eaves soffit structure 1 is inclined downwards towards the front, but it may also extend horizontally.

[0079] In addition, in this embodiment, the lower insulation material 71 is arranged in a space partitioned by adjacent vertical sidings 20 (i.e., arranged with a gap equal to the left and right width of the vertical sidings 20), but it may also be arranged so as to straddle the vertical sidings 20 and so that the vertical sidings 20 are in contact with each other. [Explanation of symbols]

[0080] 1 Eaves structure 10. Rinkai 30 Eave ceiling material 70 Insulation 71 Lower insulation 71a Eaves side insulation 71b Eaves side insulation 72 Upper insulation 80 Finishing Materials 90 Fasteners

Claims

1. Eaves and A finishing material is provided on the surface of the eaves material, The protruding length of the finishing material from the eaves material is 18 mm or more and 60 mm or less, The finishing material is provided in a plurality of layers including a plurality of first layer finishing materials provided so as to contact the surface of the eaves soffit material, and a plurality of second layer finishing materials provided so as to contact the surface of the first layer finishing materials, The plurality of first layer finishing materials are arranged so that gaps are formed between adjacent first layer finishing materials, The plurality of second layer finishing materials are arranged to bridge the gap and close the gap. Eaves structure.

2. The finishing material is A plurality of the electrodes are provided so as to be aligned in a predetermined direction, The length of the gap between the finishing materials in the predetermined direction is 50 mm or less. The eaves structure according to claim 1.

3. A joist to which the eaves material is fixed; A fastening material that fastens the finishing material to the eaves material by being driven into the siding from the outside of the finishing material; Equipped with The eaves structure according to claim 1 or claim 2.

4. The structure is provided with a heat insulating material provided so as to double-cover the siding. The eaves structure according to claim 3.

5. The finishing material is made of wood, The fastening material is made of metal. The eaves structure according to claim 3 or claim 4.

6. The total thickness of the multiple layers of the finishing material is 18 mm or more and 60 mm or less, The eaves structure according to any one of claims 1 to 5.

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