JP2023049968A - Eaves soffit structure - Google Patents

Abstract

To provide an eaves soffit structure capable of improving fire resistance performance.SOLUTION: An eaves soffit structure 1 includes a ceiling joist 10 to which an eaves soffit material 30 is fixed, a lower heat insulating material 71 provided to cover the ceiling joist 10, and an upper heat insulating material 72 provided to cover the lower heat insulating material 71. The lower heat insulating material 71 includes an eaves-edge-side heat insulating material 71a disposed on the eaves-edge side and an eaves-base-side heat insulating material 71b. In addition, a plurality of ceiling joists 10 is provided, and the eaves-edge-side heat insulating material 71a and the eaves-base-side heat insulating material 71b are provided so as to cover different ceiling joists 10 (ceiling joist 10c and ceiling joist 10b).SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to the technology of the eaves structure of a building.

Conventionally, the technique of the eaves structure of a building is publicly known. For example, it is as described in Patent Document 1.

Patent Literature 1 describes an eaves structure in which the eave base side of the eaves top plate is supported by a joist or an outer wall, and the eaves top side of the eaves top plate is supported by a joist or a fascia base.

Such an eaves structure needs to pass a predetermined fire resistance test, and an improvement in fire resistance is desired.

JP 2020-125647 A

The present invention has been made in view of the circumstances as described above, and the problem to be solved is to provide an eaves structure capable of improving fire resistance performance.

The problems to be solved by the present invention are as described above, and the means for solving the problems will now be described.

That is, in claim 1, a joist to which the eaves are fixed, a first heat insulating material provided to cover the hoisting material, and a second heat insulating material provided to cover the first heat insulating material and a material.

In claim 2, the first heat insulating material comprises an eaves-side heat insulating material arranged on the eaves-edge side and an eaves-side heat insulating material arranged on the eaves-bottom side.

In claim 3, a plurality of the joists are provided, and the eaves-side heat insulating material and the eaves-bottom side heat insulating material are provided so as to cover different joists.

In claim 4, the second heat insulating material is provided so as to cover a portion where the eaves edge side heat insulating material and the eave base side heat insulating material face each other.

In claim 5, each of the eaves-side heat insulating material and the eaves-side heat insulating material is provided by being divided into a plurality of pieces, and the second heat insulating material is provided in a gap between adjacent eaves-side heat insulating materials and between adjacent eaves-side heat insulating materials. It is provided so as to cover the gap between the eaves side heat insulating materials.

As effects of the present invention, the following effects are obtained.

In claim 1, the fire resistance can be improved.

In claim 2, it is possible to improve workability when installing the heat insulating material.

In claim 3, the fire resistance performance can be further improved.

In claim 4, the fire resistance performance can be further improved.

In claim 5, the fire resistance performance can be further improved.

The side view which showed the eaves structure which concerns on one Embodiment of this invention. The top view which showed the eaves structure which concerns on one Embodiment of this invention. The bottom view which showed the eaves structure which concerns on one Embodiment of this invention. (a) The top view which showed arrangement|positioning of the lower side heat insulating material. (a) The top view which showed arrangement|positioning of the upper side heat insulating material. Fig. 10 is a schematic front view showing the pattern of applying the finishing material, showing (a) joint joint, (b) joint watermark, (c) joint + batten, and (d) Yamato tension.

An eaves structure 1 according to an embodiment of the present invention will be described below with reference to FIGS. 1 to 4. FIG. In FIG. 2, the illustration of the rafters 3 of the roof, the heat insulating material 70, etc. is omitted in order to clearly show the configuration of the essential parts.

The eaves structure 1 shown in FIGS. 1 to 3 is a structure on the back side (lower side) of the eaves 100 of a building. The eaves 100 are portions of the roof of the building that protrude outward from the outer wall 2, and serve to protect the building by blocking rain, snow, and sunlight.

In the eaves structure 1, the side of the outer wall 2 is hereinafter referred to as the "eaves side", and the opposite side is referred to as the "eaves side". Also, the direction facing the eaves side (eaves base direction) and the direction facing the eaves side (eaves side direction) are collectively referred to as "eaves direction". Moreover, the direction (horizontal direction) perpendicular to the direction of the eaves in plan view may be referred to as the “eaves width direction”.

The eaves projection dimension L1 (the forward projection length from the outer wall 2) of the eaves structure 1 can be any value, but in the case of the eaves structure, it is 113 mm or more and 2000 mm or less, and in the case of the eaves structure, it is 88 mm or more. It is preferably 2000 mm or less. The eaves projection dimension L1 of the eaves structure 1 according to this embodiment is set to 1000 mm. Moreover, the eaves width dimension L2 (the length in the eaves width direction) of the eaves structure 1 can be an arbitrary value. The eaves width dimension L2 of the eaves structure 1 according to this embodiment is set to 1920 mm.

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 joist 10, a vertical joist 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. - 特許庁

The joist 10 shown in FIGS. 1 and 2 serves as a base for attaching the eaves 30 and the finishing material 80, which will be described later. The joist 10 is made of wood. The joist 10 is formed in a bar shape (by a rectangular bar) that is rectangular in side cross-sectional view. The joist 10 is provided with its longitudinal direction facing the eaves width direction (horizontal direction). A plurality of ceiling joists 10 are provided at intervals in the eaves projection direction. In this embodiment, three joists 10 are provided at intervals of 500 mm in the eaves projection direction. The joists 10 are fixed to the rafters 3 of the roof via appropriate members. Below, the joist 10 closest to the eaves side is called a joist 10a, the joist 10 at the center of the eaves projection direction is called a joist 10b, and the joist 10 closest to the eaves is called a joist 10c.

The vertical joists 20 shown in FIG. 2 support the joists 10 . The vertical edge 20 is made of wood. The vertical bar edge 20 is formed in a bar shape (by a rectangular bar) having a rectangular shape when viewed from the front. The vertical ridges 20 are provided with the longitudinal direction facing the direction of the eaves. That is, the vertical joist edge 20 is provided so as to be orthogonal to the joist edge 10 . A pair of vertical joists 20 are provided in front and behind the joists 10b. A plurality of vertical ridges 20 are provided at intervals in the eaves width direction. In this embodiment, the vertical joists 20 are provided five on the front side of the joist 10b and five on the rear side of the joist 10b at intervals of 455 mm in the eave width direction.

The eaves material 30 shown in FIGS. 1 to 3 constitutes the lower part (eaves) of the eaves structure 1 . The eaves 30 is formed in a rectangular plate shape in plan view. The eaves material 30 is made of any material. In this embodiment, the eaves 30 is made of a silica board (calcium silicate board mixed with fiber). The thickness of the eaves 30 can be any thickness, but is preferably 12 mm or more. The eaves 30 is provided below the joists 10 and fastened to the joists 10 with screws, nails, or the like. The eaves roof material 30 is provided so as to cover the gap between the joist 10 and the vertical joist 20. - 特許庁

The fascia base 40 shown in FIGS. 1 and 2 serves as a base for the fascia 50 described later. The fascia base 40 is formed in a plate shape with its longitudinal direction oriented in the eaves width direction. The fascia base 40 is fixed to the tip of the eaves side of the rafters 3 with screws, nails, or the like.

The fascia 50 shown in FIGS. 1 and 2 is for hiding the tip of the rafters 3 on the eaves side. The fascia 50 is formed in a plate shape with its longitudinal direction directed in the eaves width direction. The fascia 50 is attached to the edge of the eaves structure 1 on the eaves side. More specifically, the fascia 50 is provided on the eaves side of the fascia base 40 and fixed to the fascia base 40 .

The ventilation material 60 shown in FIGS. 1 and 3 is for ventilating the internal space of the eaves structure 1 . Ventilation material 60 is formed to have ventilation openings 60a (see FIG. 3). The ventilation material 60 is attached between the eaves 30 and the outer wall 2 .

The heat insulating material 70 shown in FIGS. 1 and 4 insulates the internal space of the eaves 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 structure 1 . The heat insulating material 70 is composed of two layers of heat insulating material. Specifically, the heat insulating material 70 is composed of a lower heat insulating material 71 and an upper heat insulating material 72 .

The lower heat insulating material 71 is the lower heat insulating material of the two layers of heat insulating material. The lower heat insulating material 71 is arranged in a space partitioned by the adjacent vertical ridges 20 with its longitudinal direction generally facing the direction of the eaves (see FIG. 4(a)). The lower heat insulating material 71 is composed of an eaves-side heat insulating material 71a arranged on the eaves-edge side and an eaves-side heat insulating material 71b arranged on the eaves-bottom side.

The eaves-side heat insulating material 71a is arranged so that the eaves-side end portion thereof is located on the eaves-edge side of the joist 10b. The eaves-side heat insulating material 71a is arranged so that the eaves-side portion thereof covers the rear side surface and upper surface of the joist 10c. More specifically, the eaves-side heat insulating material 71a is arranged so that the eaves-side portion thereof abuts on the rear side surface and upper surface of the joist 10c with substantially no gap.

The eaves-side heat insulating material 71b is arranged so that the eaves-side end portion thereof is positioned closer to the eaves than the joist 10a. The eaves-side heat insulating material 71b is arranged so that the eaves-side portion thereof covers the front side surface, the upper surface, and the rear side surface of the ceiling joist 10b. More specifically, the eaves-side heat insulating material 71b is arranged so that the eaves-side portion thereof abuts on the front side surface, upper surface, and rear side surface (three surfaces) of the ceiling joist 10b with substantially no gap. The edge of the eaves side of the eaves-side heat insulating material 71b is arranged so as to be in contact with the edge of the eaves side of the eaves-side heat insulating material 71a. More specifically, the eaves-side heat insulating material 71b and the eaves-side heat insulating material 71a are in contact with each other on the eaves side by about one joist 10b than the eaves 10b.

The upper heat insulating material 72 is the upper heat insulating material of the two layers of heat insulating material. The upper heat insulating material 72 is provided so as to cover the lower heat insulating material 71 from above. The upper heat insulating material 72 is generally arranged with its longitudinal direction facing the eaves width direction (see FIG. 4(b)). The upper heat insulating material 72 is arranged so as to straddle (cover) the gap between the adjacent eaves side heat insulating material 71a and the gap between the adjacent eaves side heat insulating material 71b. In addition, the upper heat insulating material 72 is arranged so as to straddle (cover) the portion where the eaves edge side heat insulating material 71a and the eaves side heat insulating material 71b face each other (the portions where they contact each other).

The heat insulating material 70 configured in this manner is provided so as to occupy most of the internal space of the eaves structure 1 . As a result, the internal space of the eaves structure 1 can be insulated, and heat transfer to the outer wall 2 can be suppressed.

In addition, by arranging the lower heat insulating material 71 so as to cover the side surfaces and the upper surface of the ceiling joist 10 (in contact with the side surfaces and the upper surface), the heat transfer to the ceiling joist 10 can be suppressed. Therefore, for example, when the eaves structure 1 is heated from the surroundings due to a fire or the like, it is possible to suppress carbonization of the ceiling joists 10 (delay the progress of carbonization). As a result, it is possible to prevent the eaves 30 fixed to the joist 10 from falling.

Moreover, by making the heat insulating material 70 into two layers, the ceiling joist 10 can be covered with the heat insulating material 70 doubly. In this way, it is possible to reduce the thickness of the lower heat insulating material 71 while filling the internal space of the eaves structure 1 (while ensuring the thickness of the heat insulating material 70 as a whole). Therefore, the lower heat insulating material 71 can be easily made to conform to the shape of the joist 10 . Therefore, heat transfer to the joist 10 can be further suppressed.

Furthermore, by providing the upper heat insulating material 72 in addition to the lower heat insulating material 71, the heat insulating effect can be enhanced. Thereby, the fireproof performance of the eaves structure 1 can be improved. In addition, since the upper heat insulating material 72 is provided so as to cover the portion where the eaves-side heat insulating material 71a and the eaves-side heat insulating material 71b face each other, can block heat from escaping. In addition, since the upper heat insulating material 72 is provided so as to cover the gaps between the adjacent eaves side heat insulating materials 71a and the gaps between the adjacent eaves side heat insulating materials 71b, the heat escaping from these gaps can be blocked. can.

In addition, by dividing the lower heat insulating material 71 into the eaves side heat insulating material 71a and the eaves base side heat insulating material 71b, the workability when incorporating the heat insulating material 70 can be improved. Also, for example, when trying to arrange two (or more) joists 10 with one heat insulating material, while arranging to cover one joist 10, so as to cover the other joist 10 Placement is relatively difficult. Therefore, by arranging the eaves side heat insulating material 71a to cover the joist 10c and the eaves side heat insulating material 71b to cover the joist 10b, each joist 10 is properly covered. can be done.

In addition, since the portion of the eaves-side heat insulating material 71b straddling the joist 10b is bent, a restoring force is applied to the portion. If such a place (that is, a place too close to the joist 10b) is the part where the eaves-side heat insulating material 71a and the eaves-side heat insulating material 71b are in contact with each other, the part that is in contact with the three surfaces of the joist almost without a gap is It may roll up. On the other hand, if the eaves-side heat insulating material 71a and the eaves-side heat insulating material 71b contact a portion that is too far from the joist 10b, it is difficult in terms of construction to bring them into contact with the three surfaces of the joist 10b without gaps. Further, if the eaves side of the joist 10b is assumed to be a portion where the eaves side heat insulating material 71a and the eaves side heat insulating material 71b are in contact (that is, when the eaves side heat insulating material 71a is arranged to straddle the joist 10b ), when the eaves-side heat insulating material 71b receives a load toward the eaves side, there is a possibility that the portion of the eaves-side heat insulating material 71a in contact with the three sides of the joist without a gap may be rolled up. Therefore, in the present embodiment, the lower heat insulating material 71 is divided into the eaves side heat insulating material 71a and the eaves side heat insulating material 71b, and the portion where the eaves side heat insulating material 71b and the eaves side heat insulating material 71a contact each other is The eaves side is about one piece of the joist 10b from the edge 10b. As a result, the lower heat insulating material 71 can be brought into contact with the three surfaces of the joist 10b with substantially no gap, thereby improving the heat insulating property.

The finishing material 80 shown in FIGS. 1 and 3 is for improving the design of the eaves material 30 (decorative wood). The finishing material 80 is made of wood. The finishing material 80 is formed in the shape of a bar having a rectangular cross section (by a rectangular bar). 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 projection direction is set to 900 mm. The finishing material 80 is provided on the lower surface of the eaves material 30 . The finishing material 80 is provided with its longitudinal direction facing the direction of the eaves. A plurality of finishing materials 80 are provided at intervals in the eaves width direction. A paint is applied to the surface of the finishing material 80 . This paint includes acrylic resin, acrylic urethane resin, silicon resin, fluorine resin, inorganic resin, alkyd resin (polyester resin), urethane resin, oil-based (oil stain), wood protection (water-based). paint), photocatalyst paint (titanium oxide), or a combination thereof. Details of the dimensions and arrangement of the finishing material 80 will be described later.

The fastening material 90 shown in FIGS. 1 and 3 is for fastening (fastening) the finishing material 80 . A screw or a nail 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 of the fastening members 90 in the eaves protruding direction is about 500 mm. The length of the fastening material 90 shall be 25 mm or more.

Here, when the eaves structure 1 is heated from below, the thinner the thickness (protruding length from the eaves material 30) L3 of the finishing material 80, the easier the heat is transmitted to the eaves structure 1, resulting in fire resistance. As the thickness L3 increases, heat is less likely to be transmitted to the eaves structure 1, and the fire resistance improves. However, if the finishing material 80 is too thick, the pull-out force of the fastening material 90 increases due to the weight of the finishing material 80 itself. When the fastening material 90 is pulled out and the finishing material 80 falls, the fireproof performance of the eaves structure 1 deteriorates. Considering this, the thickness L3 of the finishing material 80 is set to 18 mm or more and 60 mm or less. It should be noted that the numerical value of the thickness L3 of the finishing material 80 may take account of a tolerance, for example, a tolerance of ±6 mm. By setting the thickness L3 of the finishing material 80 to be 18 mm or more, it is possible to make it difficult for heat to be conducted to the eaves structure 1 . On the other hand, since the thickness L3 of the finishing material 80 is 60 mm or less, it is possible to suppress the generation of the pull-out force of the fastening material 90 .

In addition, 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 arranged), that is, the larger the opening width L4, the more easily heat is transmitted from the gap to the eaves structure 1. The fire resistance performance of Structure 1 is reduced. Considering this, the opening width L4 of the finishing material 80 is set to 50 mm or less. Note that the numerical value of the openwork width L4 of the finishing material 80 may take into consideration a tolerance, for example, a tolerance of ±5 mm. This makes it difficult for heat from below the eaves structure 1 to be transmitted to the eaves material 30 and the like, thereby improving the fire resistance performance of the eaves structure 1 .

Further, the finishing material 80 is fastened to the eaves 30 by driving the fastening material 90 into the joist 10 from the outside of the finishing material 80 . Therefore, when the eaves structure 1 is heated from the upper surface side or the side surface side, the heat transmitted to the joists 10 can be discharged to the outside through the fastening material 90, so that the fireproof performance of the eaves structure 1 can be improved. can be improved.

By attaching the finishing material 80 to the eaves structure 30 with the above specifications, it is possible to improve the design of the eaves structure 1 and improve the fire resistance.

An example of the application pattern of the finishing material 80 will be described below with reference to FIG.

The application pattern (arrangement method) of the finishing material 80 is not particularly limited, and can be determined according to the architectural design. For example, as shown in FIG. 5(a), the finishing materials 80 may be butted against each other without providing a gap (joint) (with a joint). Further, as shown in FIG. 5(b), a gap (joint) may be provided between the finishing materials 80 (joint watermark). Further, as shown in FIG. 5(c), the first layer is a state in which the finishing materials 80 are butted against each other without providing a gap (joint), and the second layer is provided with a gap (joint) between the finishing materials 80. It may be in the state (butting + grid plate). Further, as shown in FIG. 5(d), the first layer is a state in which a gap (joint) is provided between the finishing materials 80, and the second layer is formed so as to close the gap between the first layers and the finishing materials 80 are separated from each other. A gap (joint) may be provided (Yamato-bari).

When the finishing material 80 has two or more layers as shown in FIGS. 5(c) and 5(d), the total thickness L5 is 18 mm or more and 60 mm or less (±6 mm). Thereby, fireproof performance can be improved.

As described above, the eaves structure 1 according to the present embodiment is
eaves 30;
Equipped with a finishing material 80 provided on the surface of the eaves material 30,
A projection length L3 of the finishing material 80 from the eaves 30 is 18 mm or more and 60 mm or less.

By being configured in this way, the fire resistance can be improved.
Specifically, by setting the projection length L3 of the finishing material 80 to be 18 mm or more, it is possible to make it difficult for heat to be conducted to the eaves structure 1 . On the other hand, since the projection length L3 of the finishing material 80 is 60 mm or less, it is possible to suppress the generation of the pull-out force of the fastening material 90 . Thereby, the fireproof performance of the eaves structure 1 can be improved.

In addition, the finishing material 80 is
Multiple are provided so as to line up in a predetermined direction (eaves width direction),
The length of the gap between the finishing materials 80 in the predetermined direction (the width of the openwork) L4 is 50 mm or less.

By being configured in this way, the fire resistance performance can be further improved.
Specifically, since it is possible to suppress the intrusion of heat through the gaps between the finishing materials 80, the fireproof performance of the eaves structure 1 can be further improved.

Moreover, the eaves structure 1 according to the present embodiment is
A joist 10 to which the eaves roof 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;
is provided.

By being configured in this way, the fire resistance performance can be further improved.
Specifically, the heat transmitted to the joists 10 can be discharged to the outside through the fastening material 90, so that the fireproof performance of the eaves structure 1 can be further improved.

Moreover, the eaves structure 1 according to the present embodiment is
A heat insulating material 70 (a lower heat insulating material 71 and an upper heat insulating material 72) is provided so as to cover the joist 10 in a double manner.

By being configured in this way, the fire resistance performance can be further improved.
Specifically, it is possible to reduce the thickness of the lower heat insulating material 71 while filling the internal space of the eaves structure 1 (while ensuring the thickness of the heat insulating material 70 as a whole). 71 (as a result, the heat insulating material 70 whole) can be made easy to follow the shape of the joist 10. - 特許庁In this way, 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 ceiling joists 10 . Therefore, it is possible to suppress carbonization of the joists 10 (delay the progress of carbonization), and consequently to suppress the eaves 30 from falling.

Further, in the eaves structure 1 according to the present embodiment,
The finishing material 80 is made of wood,
The fastening material 90 is made of metal.

With this configuration, the fire resistance of the eaves structure 1 in which the finishing material 80 is made of wood and the fastening material 90 is made of metal can be further improved.

In addition, the finishing material 80 is provided so as to form a plurality of layers,
A total thickness L5 of the plurality of layers of the finishing material 80 is 18 mm or more and 60 mm or less.

With such a configuration, it is possible to improve the fire resistance performance while further improving the design.

Further, as described above, the eaves structure 1 according to the present embodiment is
A joist 10 to which the eaves roof 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;
is provided.

By being configured in this way, the fire resistance can be improved.
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 ceiling joists 10 . Therefore, it is possible to suppress carbonization of the joists 10 (delay the progress of carbonization), and consequently to suppress the eaves 30 from falling.
Also, by forming the heat insulating material 70 in two layers, the thickness of the lower heat insulating material 71 can be reduced. Therefore, the lower heat insulating material 71 can be easily made to conform to the shape of the joist 10 . Therefore, heat transfer to the joist 10 can be further suppressed. Furthermore, by providing the upper heat insulating material 72 in addition to the lower heat insulating material 71, the heat insulating effect can be enhanced. Thereby, the fireproof performance of the eaves structure 1 can be improved.

In addition, the lower heat insulating material 71 is
eaves side heat insulating material 71a arranged on the eaves side;
an eaves-side heat insulating material 71b arranged on the eaves side;
is provided.

With such a configuration, workability when installing the heat insulating material 70 can be improved.

In addition, a plurality of the joists 10 are provided,
The eaves-side heat insulating material 71a and the eaves-side heat insulating material 71b are provided so as to cover different joists 10 (roofing 10c, joisting 10b).

By being configured in this way, the fire resistance performance can be further improved.
Specifically, for example, when one heat insulating material is arranged to cover two (or more) joists 10, one joist 10 is arranged to cover the other joist 10 It is relatively difficult to arrange to cover. Therefore, by arranging the eaves side heat insulating material 71a to cover the joist 10c and the eaves side heat insulating material 71b to cover the joist 10b, each joist 10 is properly covered. can be done.

In addition, the upper heat insulating material 72 is
It is provided so as to cover the portion where the eaves edge side heat insulation material 71a and the eaves base side heat insulation material 71b face each other.

By being configured in this way, the fire resistance performance can be further improved.
Specifically, the upper heat insulating material 72 can block the heat escaping from between the eaves side heat insulating material 71a and the eaves base side heat insulating material 71b.

Each of the eaves-side heat insulating material 71a and the eaves-side heat insulating material 71b is divided into a plurality of pieces, and the upper heat insulating material 72 is provided between the adjacent eaves-side heat insulating material 71a and the adjacent eaves-side heat insulating material 71a. It is provided so as to cover the gap between the eaves side heat insulating materials 71b.

By being configured in this way, the fire resistance performance can be further improved.
Specifically, the upper heat insulating material 72 can block the heat escaping from the gaps between the eaves side heat insulating materials 71a and the gaps between the adjacent eaves side heat insulating materials 71b.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above configurations, and various modifications are possible within the scope of the invention described in the claims.

For example, in the present embodiment, the finishing material 80 is provided with its longitudinal direction facing the direction of the eaves, but the orientation of the finishing material 80 is not limited to this, and may be any direction. For example, it may be provided with the longitudinal direction facing the eaves width direction.

Moreover, although the joists 10 are directly fixed to the rafters 3, they may be fixed via a hanging tree.

Further, in the present embodiment, the eaves structure 1 is slanted forward and downward, but it may be extended horizontally.

In addition, in the present embodiment, the lower heat insulating material 71 is arranged in a space partitioned by the adjacent vertical ribs 20 (that is, the vertical ribs 20 are spaced apart by the left and right widths of the vertical ribs 20 ), however, it may be arranged so that the vertical joint edges 20 are in contact with each other so as to straddle the vertical joint edges 20 .

1 eaves structure 10 joists 30 eaves material 70 heat insulation material 71 lower heat insulation material 71a edge side heat insulation material 71b eave base side heat insulation material 72 upper side heat insulation material 80 finishing material 90 fastening material

Claims (5)

Roofing to which the eaves are fixed,
A first heat insulating material provided to cover the joist;
A second heat insulating material provided to cover the first heat insulating material;
comprising a
Eave structure. The first heat insulating material is
an eaves-side heat insulating material arranged on the eaves side;
an eaves-side heat insulating material arranged on the eaves side;
comprising a
The eaves structure according to claim 1. A plurality of the joists are provided,
The eaves side heat insulating material and the eaves side heat insulating material are provided so as to cover the different joists,
The eaves structure according to claim 2. The second heat insulating material is
The eaves-side heat insulating material and the eaves-side heat insulating material are provided so as to cover opposing portions,
The eaves structure according to claim 2 or 3. Each of the eaves-side heat insulating material and the eaves-side heat insulating material is divided into a plurality of pieces,
The second heat insulating material is
Provided to cover gaps between adjacent eaves-side heat insulating materials and gaps between adjacent eaves-side heat insulating materials,
The eave structure according to any one of claims 2 to 4.

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