JP7672535B2 - Eaves structure - Google Patents

Description

This invention relates to the eaves structure of a building.

When installing eaves top boards, it is common to fasten the boards from the underside to the building's rafters with fasteners such as nails and screws. In this case, the heads of the fasteners such as nails and screws must be repaired so that they are not noticeable, which creates the problem that the repaired areas become noticeable as they deteriorate over time.

Also, as shown in Figure 50 or Figure 51, a support member for the eaves top board on the eaves side is known in which an eaves top board support piece 104 that supports the eaves top side of the eaves top board 103 is provided on a trim edge 102 attached to the eaves side fascia base 100 or rafter 101.

JP 2001-98693 A Japanese Patent Application Publication No. 07-331793

However, in the eaves top board support member of Patent Documents 1 and 2, the eaves top board support piece 104 that supports the eaves top board 103 on the eaves top side is integrally formed with the eaves top board support piece 102 attached to the eaves top board fascia base 100 or the rafter 101 on the eaves top side, so the position of the eaves top board support piece 104 in the eaves top protruding direction is fixed and cannot be changed.

As a result, a gap forms between the eaves end of the eaves top board 103 and the eaves top board support piece 104, making the eaves top board 103 prone to wobbling.

If the eaves board 103 is loose, it is undesirable in terms of fire protection, waterproofing, and wind pressure resistance.

This invention is intended to prevent lateral displacement of the joints of adjacent eaves boards in the width direction.

This invention relates to an eaves structure in which the eaves base sides of adjacent eaves top boards in the width direction are supported on a rafter or exterior wall via an eaves base side support member, and the eaves end sides of the eaves top boards are supported on a rafter or fascia base via an eaves end side support member, and the joint fittings are provided at the joints of adjacent eaves top boards in the width direction, and the joint fittings comprise a fixed plate fixed to the vertical surface of the fascia base, exterior wall or rafter, an upper panel plate provided below the fixed plate and positioned on the upper surface of the eaves top board, and a stopper portion provided separately from the upper panel and inserted into the butt joints of adjacent eaves top boards in the width direction, the upper panel plate having a slit that overlaps with an upper surface groove provided at the butt joints of adjacent eaves top boards in the width direction, and the stopper comprises an engagement plate portion overlapping the upper surface of the upper panel and an engagement portion that is fitted into the upper surface groove of the butt joints of adjacent eaves top boards through the slit of the upper panel.

The lower surface of the upper panel may be provided with a positioning protrusion that engages with an upper surface groove at the butt joint of adjacent eaves panels in the width direction.

As described above, according to the present invention, it is possible to prevent lateral displacement of the joints of adjacent eaves boards in the width direction.

1 is an explanatory diagram of a side view of a eaves soffit structure according to an embodiment of the present invention. FIG. FIG. 2 is a perspective view of the eaves end side trim used in the eaves structure of FIG. 1 . FIG. 2 is a perspective view of the eaves end side fixing metal fitting used in the eaves structure of FIG. 1. FIG. 2 is a perspective view of a eaves-base side trim edge used in the eaves structure of FIG. 1 . FIG. 2 is a perspective view of a fixing bracket at the eaves base used in the eaves structure of FIG. 1 . An explanatory diagram of a side view of the eaves end side of a eaves soffit structure according to another embodiment of the present invention. An explanatory diagram of a side view of the eaves end side of a eaves soffit structure according to another embodiment of the present invention. An explanatory diagram of a side view of the eaves end side of a eaves soffit structure according to another embodiment of the present invention. An explanatory diagram of a side view of the eaves end side of a eaves soffit structure according to another embodiment of the present invention. An explanatory diagram of a side view of the eaves end side of a eaves soffit structure according to another embodiment of the present invention. FIG. 11 is a perspective view of the eaves end side fixing metal fitting used in the eaves structure of FIG. 10. An explanatory diagram of a side view of the eaves end side of a eaves soffit structure according to another embodiment of the present invention. FIG. 13 is an oblique view of the eaves end side fixing metal fitting used in the eaves structure of FIG. 12. An explanatory diagram of a side view of the eaves end side of a eaves soffit structure according to another embodiment of the present invention. FIG. 15 is an oblique view of the eaves end side fixing metal fitting used in the eaves structure of FIG. 14 . An explanatory diagram of a side view of the eaves end side of a eaves soffit structure according to another embodiment of the present invention. 16A is a side view of the state in which the sliding member constituting the eaves-end side fixing bracket used in the eaves structure of Figure 16 has been moved toward the eaves end relative to the holding and limiting member, and FIG. 16B is a side view of the state in which the sliding member has been moved toward the eaves base relative to the holding and limiting member. 17A is a plan view of the sliding member in the eaves-end side fixing metal fitting used in the eaves structure of FIG. 16, FIG. 17B is a side view, and FIG. This is an oblique view of the slide member of the eaves end side fixing bracket used in the eaves structure of Figure 16. 17A is a plan view of the holding and limiting member in the eaves end side fixing bracket used in the eaves structure of FIG. 16, FIG. 17B is a side view, and FIG. 17 is a perspective view of a holding and limiting member in the eaves end side fixing bracket used in the eaves structure of FIG. 16. This is an explanatory diagram showing the state in which the eaves end side fixing bracket used in the eaves soffit structure of Figure 16 is fixed to the fascia base. An explanatory diagram of a side view of the eaves end side of a eaves soffit structure according to another embodiment of the present invention. (a) is a side view of the state in which the sliding member of the eaves-end fixing bracket used in the eaves structure of Figure 23 has been moved toward the eaves end relative to the holding and limiting member, and (b) is a side view of the state in which the sliding member has been moved toward the eaves base relative to the holding and limiting member. 24A is a plan view of the sliding member in the eaves-end side fixing bracket used in the eaves structure of FIG. 23, FIG. 24B is a side view, and FIG. 24C is a front view. This is an oblique view of the slide member of the eaves end side fixing bracket used in the eaves structure of Figure 23. 23A is a plan view of the holding and limiting member in the eaves-end fixing bracket used in the eaves structure of FIG. 23, FIG. 23B is a side view, and FIG. This is an oblique view of a holding and limiting member in the eaves end side fixing bracket used in the eaves structure of Figure 23. 13 is an explanatory diagram of another embodiment of the eaves base side of the eaves soffit structure of the present invention from a side view. FIG. This is an oblique view of the eaves base side fixing bracket used in the eaves structure of Figure 29. 13 is an explanatory diagram of another embodiment of the eaves base side of the eaves soffit structure of the present invention from a side view. FIG. This is an oblique view of the eaves base side fixing bracket used in the eaves structure of Figure 31. 13 is an explanatory diagram of another embodiment of the eaves base side of the eaves soffit structure of the present invention from a side view. FIG. This is an oblique view of the eaves base side fixing bracket used in the eaves structure of Figure 33. 13 is an explanatory diagram of another embodiment of the eaves base side of the eaves soffit structure of the present invention from a side view. FIG. This is an oblique view of the eaves base side fixing bracket used in the eaves structure of Figure 35. 1 is a cross-sectional view showing an example of a butt joint between adjacent eaves soffits using joint fittings. FIG. This is an oblique view of a joint fitting used at the butt joint of the eaves top boards of Figure 37. A cross-sectional view showing another example of the butt joint portion of adjacent eaves boards using the joint fitting of Figure 38. A cross-sectional view showing the butt joint of adjacent eaves boards using another example of joint fitting. FIG. 41 is a perspective view of the joint fitting of FIG. 40 . A cross-sectional view showing the butt joint of adjacent eaves boards using another example of joint fitting. FIG. 43 is a perspective view of the joint fitting of FIG. 42 . A cross-sectional view showing the butt joint of adjacent eaves boards using another example of joint fitting. FIG. 45 is a perspective view of FIG. 13 is a perspective view showing the butt joint portion of adjacent eaves boards using another example of joint fitting. FIG. FIG. 47 is a partial cross-sectional view of FIG. 46. 13 is a perspective view showing the butt joint portion of adjacent eaves boards using another example of joint fitting. FIG. FIG. 49 is a partial cross-sectional view of FIG. 48. FIG. 11 is a cross-sectional view showing a conventional eaves-end side support member of an eaves top board. FIG. 11 is a cross-sectional view showing another example of a conventional eaves-end side support member of an eaves top board.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
In the embodiment of the eaves soffit structure shown in Figure 1, the eaves base side of the eaves soffit board 1 is supported to the rafters 2 via an eaves base side support member 3, and the eaves tip side of the eaves soffit board 1 is supported to the rafters 2 and the fascia board base 4 via an eaves tip side support member 5.

The eaves-side support member 5 consists of an eaves-side fixing bracket 6A that is fixed to the siding 2, and an eaves-side trim edge 7A that covers the eaves-side fixing bracket 6A. The eaves-side fixing bracket 6A is fixed to the siding 2 so that its position can be changed in the direction of the eaves, and the eaves-side trim edge 7A is attached to the fascia base 4.

The eaves-side trim 7A is a long member (e.g., about 3000 mm) long in the girder direction as shown in Figure 2, while the eaves-side fixing brackets 6A are short members as shown in Figure 3, and are arranged at intervals (e.g., 455 mm intervals) in the girder direction.

As shown in FIG. 3, the eaves-side fixing bracket 6A includes an upper support piece 6a located on the upper surface of the eaves top board 1, a lower support piece 6b located on the underside of the eaves top board 1, a hanging piece 6c that connects the upper support piece 6a and the lower support piece 6b, faces the end face of the eaves top board 1 on the eaves side, and presses the end face of the eaves top board 1 on the eaves side toward the eaves base, and an attachment piece 6d that extends from the end of the eaves side of the upper support piece 6a toward the eaves side and is fastened upward to the joist 2 by fasteners 8 such as nails or screws.

The mounting piece 6d of the eaves-side fixing bracket 6A has an insertion hole 6e for a fastener 8 such as a nail or screw.

In addition, the tip of the lower support piece 6b of the eaves-side fixing bracket 6A on the eaves base side is widened downward, making it easier to insert the eaves top board 1 when inserting the eaves side of the eaves top board 1 between the upper support piece 6a and the lower support piece 6b.

As shown in FIG. 2, the eaves-side trim 7A has an approximately Z-shaped cross section, with an upper portion 7a, a lower portion 7b, and an oblique rising portion 7c connecting them. The outdoor end of the upper portion 7a of the eaves-side trim 7A is folded back upward. Similarly, the indoor end of the lower portion 7b of the eaves-side trim 7A is also folded back upward, and this folded back portion forms the insertion portion 7d that is inserted between the lower support piece 6b of the eaves-side fixing bracket 6A and the underside of the eaves top board 1.

The upper portion 7a of the eaves-side trim 7A is fixed to the underside of the fascia board base 4 by fasteners 9 such as nails or screws that are driven upward from the underside of the fascia board base 4. A fascia board 14, which is a building component on the eaves side, is attached to the outdoor side of the fascia board base 4. The fascia board 14 is arranged so that its lower end protrudes downward below the lower end of the eaves-side trim 7A.

The rising portion 7c of the eaves-side trim 7A is provided with an air vent 10 that leads to the ceiling, and the rising portion 7c constitutes a ventilation wall. The air vent 10 in the rising portion 7c connects the eaves soffit to the outdoors, allowing ventilation to be provided under the eaves soffit.

On the other hand, the eaves-base support member 3 of the eaves soffit structure of the embodiment shown in Figure 1 is composed of the eaves-base trim edge 11A shown in Figure 4 and the eaves-base fixing bracket 12A shown in Figure 5, and the eaves-base trim edge 11A and the eaves-base fixing bracket 12A are fixed to the eaves soffit 2 by fasteners 13 such as nails or screws driven upward from the underside of the eaves soffit 2.

The eaves-side trim 11A is a long member (e.g., about 3000 mm) that is long in the girder direction, while the eaves-side fixing bracket 12A is a short member that is spaced apart in the girder direction (e.g., 455 mm apart). The fastener 13 penetrates the eaves-side fixing bracket 12A and the upper part of the eaves-side trim 11A and is driven into the underside of the joist 2. The eaves-side fixing bracket 12A is fixed to the joist 2 together with the eaves-side trim 11A.

As shown in Figure 4, the eaves-side trim 11A has an upper part 11a, a lower part 11b, and a rising part 11c connecting them, and has a generally U-shaped cross section. As shown in Figure 5, the eaves-side fixing bracket 12A also has an upper part 12a, a lower part 12b, and a rising part 12c connecting them, and has a generally U-shaped cross section, and the upper part 12a has an insertion hole 12d through which a fastener 13 such as a nail or screw can be inserted.

The eaves-side trim 11A is formed slightly larger than the eaves-side fixing bracket 12A so that it can cover the outer surface of the eaves-side fixing bracket 12A. The upper part 11a of this eaves-side trim 11A abuts against the underside of the joist 2, and the rising part 11c abuts against the surface of the exterior wall material or the exterior wall base.

The upper part 12a of the eaves side fixing bracket 12A is located on the upper side of the eaves side of the eaves top board 1 that is arranged horizontally, for example, and the lower part 12b is located on the lower side of the eaves side of the eaves top board 1, and the end surface on the indoor side of the eaves top board 1 is abutted against the rising part 12c.

The outdoor end of the upper part 11a of the eaves-side trim 11A is folded downward, and this folded part is engaged with the outdoor end of the upper part 12a of the eaves-side fixing bracket 12A. Similarly, the outdoor end of the lower part 11b of the eaves-side trim 11A is folded upward, and this folded part is engaged with the outdoor end of the lower part 12b of the eaves-side fixing bracket 12A.

The procedure for constructing the eaves soffit structure shown in Figure 1 is, for example, to attach the eaves base fixing bracket 12A to the eaves base trim 11A, and then fix the eaves base fixing bracket 12A and the eaves base trim 11A to the joist 2 at a specified pitch with fasteners 13 such as nails or screws (the eaves base fixing bracket 12A may be fixed after the eaves base trim 11A is attached first).

Then, the eaves side of the eaves top board 1 is inserted between the upper part 12a and the lower part 12b of the eaves top side fixing bracket 12A, and the eaves end side of the eaves top board 1 is lifted and inserted between the upper support piece 6a and the lower support piece 6b of the eaves end side fixing bracket 6A to attach the eaves end side fixing bracket 6A to the eaves end side of the eaves top board 1. Next, the eaves end side fixing bracket 6A is slid indoors, and the eaves top board 1 is moved to the eaves end side, and the hanging piece 6c presses the eaves top board 1 toward the eaves end side. After that, the mounting piece 6d of the eaves end side fixing bracket 6A is fastened upward to the joist 2 with a fastener 8 such as a nail or screw.

Then, insert the insertion portion 7d of the eaves-side trim 7A between the lower support piece 6b of the eaves-side fixing bracket 6A and the underside of the eaves top board 1, and while adjusting the amount of insertion, fasten the upper portion 7a of the eaves-side trim 7A to a specified position on the fascia base 4 with fasteners 9 such as nails or screws.

In this way, in the eaves structure shown in Figure 1, the eaves end fixing bracket 6A is slid toward the interior, the eaves board 1 is moved toward the base of the eaves, and the hanging piece 6c presses the eaves board 1 toward the base of the eaves, allowing the eaves board 1 to be attached without any wobble.

The eaves top board 1 is pressed toward the eaves base by the eaves-side fixing bracket 6A, so that even if the position of the eaves-side fixing bracket 6A in the eaves-side projection direction changes, the insertion portion 7d of the eaves-side trim 7A is inserted between the lower support piece 6b of the eaves-side fixing bracket 6A and the underside of the eaves top board 1, and the upper portion 7a of the eaves-side trim 7A is fastened to a specified position on the fascia base 4 with fasteners 9 such as nails or screws while adjusting the amount of insertion. This allows the eaves-side trim 7A to hide the fasteners 8 of the eaves-side fixing bracket 6A and the eaves-side fixing bracket 6A itself, so that the aesthetic appearance when viewed from below is not impaired.

Next, Figure 6 shows another embodiment of the eaves soffit structure of this invention. This embodiment is an example that uses an eaves-end side trim 7B, which is a modified version of the eaves-end side trim 7A in Figure 1. The same reference numerals are used to designate parts that are common to the eaves-end side trim 7A and the eaves-end side trim 7B, and duplicated explanations will be omitted. In the various examples that follow, the same reference numerals are used to designate parts that are common to the eaves-end side trim 7A and the eaves-end side trim 7B, and duplicated explanations will be omitted.

The eaves-side trim 7B in Figure 6 is folded upward from the outdoor end of the upper part 7a, and is extended to a position beyond the rising part 7c on the indoor side. The indoor end of this extension is folded downward so as to reach the point where the airflow (arrow) from the ventilation opening 10 passes through, and the end of this folded part functions as a water-repelling piece 7e, making it possible to prevent rainwater from entering under the eaves.

In addition, a thermally expandable fireproofing material 15 that expands due to heat during a fire is placed on the inside of the lower part 7b of the eaves-side trim 7B so as to cover the vent 10 of the rising part 7c when it expands. For example, the thermally expandable fireproofing material 15 is formed in a tape shape and is attached in the girder direction on the inner surface of the lower part 7b of the eaves-side trim 7B at a position below the vent 10.

Figure 7 also shows eaves edge 7C, which is another example of eaves edge 7A used in the eaves soffit structure of this invention.

The eaves-side trim 7C in Figure 7 has a hanging portion 7f that faces downward from the outdoor end of the upper portion 7a, a second lower portion 7g that extends the lower end of this hanging portion 7f toward the outdoor side, and a third rising portion 7h that extends the outdoor end of this second lower portion 7g upward and abuts the fascia 14, forming a second ventilation space on the eaves side, and a second ventilation hole 16 formed in the hanging portion 7f that connects the underside of the eaves soffit to the outdoors, improving ventilation under the eaves soffit.

Furthermore, Figure 8 also shows eaves edge 7D, which is another example of the eaves edge 7A used in the eaves soffit structure of this invention, and further improves ventilation under the eaves soffit compared to eaves edge 7C in Figure 7.

In Fig. 8, the eaves-side trim 7D extends the third rising portion 7h upward until it abuts the underside of the fascia board base 4, and the upper end of this third rising portion 7h is bent toward the exterior to provide a second upper portion 7i that abuts the underside of the fascia board base 4. The second upper portion 7i is fixed to the underside of the fascia board base 4 by fasteners 17 such as nails or screws that are driven upward from the underside of the fascia board base 4.

The third raised portion 7h is provided with a third ventilation hole 18, which connects the underside of the eaves with the outdoors, improving ventilation under the eaves.

In addition, the eaves-side trim 7D has a rising portion 7j with a fourth ventilation hole 19 between the eaves-side end of the lower portion 7b and the eaves-side end of the insertion portion 7d.

Furthermore, Figure 9 also shows eaves edge 7E, which is another example of the eaves edge 7A used in the eaves soffit structure of this invention, and further improves ventilation under the eaves soffit compared to the eaves edge 7D in Figure 8.

The eaves-side trim edge 7E in Figure 9 is an example in which the length of the third rising portion 7h and the hanging portion 7f are extended further downward than the eaves-side trim edge 7D, making the ventilation space larger and improving ventilation under the eaves soffit.

Next, Figure 10 shows another embodiment of the eaves structure of this invention.

The eaves end side fixing bracket 6B used in the eaves soffit structure in Fig. 10 is a modified version of the eaves end side fixing bracket 6A in Fig. 1, and as shown in Fig. 11, a spring-like urging portion 6f is formed on both edges of the indoor side end of the lower support piece 6b, with a portion cut out and the roughly central portion bent so as to protrude upward. The bottom end of the urging portion 6f is roughly flush with the lower support piece 6b, and the urging portion 6f is gradually pushed upward by the underside of the eaves soffit board 1 into which it is inserted. This urging portion 6f is pushed downward by the underside of the eaves soffit board 1, and is pushed up in the thickness direction of the eaves soffit board 1. This makes it possible to prevent the occurrence of support gaps in the thickness direction on the eaves end side of the eaves soffit board 1, and also prevents rattling in the thickness direction on the eaves end side of the eaves soffit board 1.

The hanging piece 6c of the eaves end side fixing bracket 6B is cut and formed with a biasing portion 6g that biases the eaves top board 1 toward the eaves base. By providing the biasing portion 6g on the hanging piece 6c, even if the eaves top board 1 becomes thinner from the eaves base support side to the eaves end support side due to aging, it is possible to prevent rattling due to aging in that direction. In the example of Figure 10, the eaves end side trim 7B is used.

Figure 12 also shows the eaves end fixing bracket 6C, which is another example of the eaves end fixing bracket 6A in the eaves soffit structure of this invention, and in this embodiment, the eaves end trim 7B is used.

As shown in FIG. 13, the eaves-side fixing bracket 6C in FIG. 12 has a spring-like biasing portion 6h that is bent so that the central portion protrudes downward by cutting into both edges of the interior end of the upper support piece 6a. The bottom end of the biasing portion 6h is at approximately the same height as the upper support piece 6a, and the biasing portion 6f is gradually pushed downward by the upper surface of the eaves top board 1 into which it is inserted. The biasing portion 6h is pushed by the upper surface of the eaves top board 1, bending upward, and pushing down in the thickness direction of the eaves top board 1. This makes it possible to prevent the occurrence of support gaps in the thickness direction on the eaves side of the eaves top board 1, and also prevents rattling in the thickness direction on the eaves side of the eaves top board 1.

The hanging piece 6c of the eaves end side fixing bracket 6C is cut to form a biasing portion 6g that biases the eaves top board 1 toward the eaves base. By providing the biasing portion 6g on the hanging piece 6c, even if the eaves top board 1 becomes thinner in the direction from the eaves base support side to the eaves end support side due to aging, rattling due to aging in that direction can be prevented.

Figure 14 also shows the eaves end fixing bracket 6D, which is another example of the eaves end fixing bracket 6A in the eaves soffit structure of this invention, and in this embodiment, the eaves end trim 7B is used.

As shown in Fig. 15, the eaves-end fixing bracket 6D in Fig. 14 is formed by cutting and raising the protrusion 6i that is inserted into the end surface of the eaves top board 1 on the hanging piece 6c. By inserting this protrusion 6i into the end surface of the eaves top board 1, rattling between the eaves-end fixing bracket 6D and the eaves top board 1 can be prevented.

Next, Figure 16 also shows another example of the eaves end fixing bracket 6A in the eaves soffit structure of this invention, the eaves end fixing bracket 6E, and in this embodiment, the eaves end trim 7A is used.

The eaves-side fixing bracket 6E of the embodiment shown in Figure 16 includes a slide member 61 (shown by a two-dot chain line) that can slide in a direction that presses the eaves top board 1 toward the eaves base, and a holding limiting member 62 that holds the slide member 61 slidably while limiting its return in the direction opposite to the pressing direction, as shown in Figures 17(a) and (b).

The retention limiting member 62 is integrally provided with a fixing plate portion 621 that is fixed to the vertical surface on the indoor side (back side) of the fascia base 4 by fasteners 81 such as nails or screws. This fixing plate portion 621 is integrally provided perpendicularly to the outdoor side edge of the upper surface of the retention limiting member 62. The fixing plate portion 621 is provided with an insertion hole 622 into which a fastener 81 that fixes the retention limiting member 62 to the back side of the fascia base 4 is driven. The retention limiting member 62 is fixed to the fascia base 4 by abutting the fixing plate portion 621 against the back side of the fascia base 4 and driving the fastener 81 into the insertion hole 622.

As shown in Figures 18(a), (b), (c) and 19, the slide member 61 comprises an upper part 611, a lower part 612 and a vertical plate part 613 connecting them. The upper part 611 is held by the holding and limiting member 62E to allow and limit movement, and an uneven part 614 is formed on the underside of the upper part 611. The lower part 612 is located below the eaves top board 1 and supports the eaves top board 1. The vertical plate part 613 faces the outdoor end face of the eaves top board 1 and is the part that pushes the eaves top board 1 towards the eaves base.

As shown in Figures 20(a), (b), (c) and 21, the holding and limiting member 62 is a metal piece having a horizontal plate portion and a pair of vertical plate portions standing at right angles upward along both sides of the horizontal plate portion, and the vertical plate portions form the fixed plate portion 621.

The horizontal plate portion of the holding and limiting member 62 is cut with two slits parallel to the vertical plate portion, and the area between these slits is pressed downward by press working to integrally form a single bag portion 623 that encases the upper part 611 of the slide member 61 so that it can slide freely. This bag portion 623 is formed by cutting and raising a protrusion 624 that engages with the uneven portion 614 formed on the underside of the upper part 611 of the slide member 61.

In addition, a spring steel biasing portion 625 is provided on the underside of the bag portion 623 of the holding and limiting member 62 to press the eaves top board 1 against the lower portion 612 of the slide member 61. This spring steel biasing portion 625 presses the eaves top board 1 against the lower portion 612 of the slide member 61E, so that even if there is variation in the thickness of the eaves top board 1 or the thickness of the eaves top board 1 is reduced due to aging, the undersides of adjacent eaves top boards 1 are aligned, so that when the eaves top boards 1 are viewed from below, no steps are created, and the appearance is good. The spring steel biasing portion 625 hangs down from the eaves base side to the eaves tip side, and the eaves base side is joined to the bag portion 623 by a burring rivet portion 626.

The holding and limiting member 62 is formed with a second fixing plate portion 627 that extends from between a pair of vertical plate portions constituting the fixing plate portion 621 toward the eaves side. This second fixing plate portion 627 and the horizontal plate portion are located on the same plane. The second fixing plate portion 627 is provided with an insertion hole 628 for the fastener 82 so that the holding and limiting member 62 can be fixed to the underside of the fascia base 4 by the fastener 82.

A pair of fixing plate portions 615 are formed on the outdoor end of the upper portion 611 of the slide member 61E, which extend outdoors on the same plane as the upper portion 611 and have downwardly curved tips. The pair of fixing plate portions 615 are spaced apart at a predetermined distance in a direction perpendicular to the sliding direction of the slide member 61, and as shown in FIG. 22, by positioning the fastener 82 between the pair of fixing plate portions 615, the second fixing plate portion 627 of the retention limiting member 62 can be fixed to the underside of the fascia base 4 by the fastener 82.

In the eaves soffit structure shown in Figure 16, a pair of fixing plate parts 615 are formed at the outdoor end of the upper part 611 of the sliding member 61, which extend outdoors on the same plane as the upper part 611 and have downwardly bent tips. After the sliding member 61 pushes the eaves soffit board 1 toward the eaves base, the eaves end side trim edge 7B is attached to the fascia board 4 with a fastener 9, so that the pair of fixing plate parts 615 of the sliding member 61 abuts against the eaves end side trim edge 7B, reliably preventing the sliding member 61 from returning.

As shown in FIG. 17(a), the eaves-side fixing bracket 6E of the embodiment shown in FIG. 16 is preferably provided with a protrusion 616 on the top surface of the indoor end of the upper part 611 of the slide member 61 to prevent the slide member 61 from slipping out of the bag part 623 of the hold limiting member 62 even if the slide member 61 is strongly pulled toward the outdoors relative to the hold limiting member 62. Note that if the protrusion 616 is formed before inserting the slide member 61 into the bag part 623 of the hold limiting member 62 and assembling it, it will cause problems when inserting the slide member 61 into the bag part 623 of the hold limiting member 62, so it is necessary to form the protrusion 616 by pressing after inserting the bag part 623 into the hold limiting member 62.

Next, Figure 23 shows an embodiment that uses the eaves-side fixing bracket 6F, which is a modified version of the eaves-side fixing bracket 6E shown in Figure 16.

The eaves soffit structure shown in Figure 23, like the eaves soffit structure shown in Figure 16, has a pair of fixing plate parts 615 that extend outdoors on the same plane as the upper part 611 at the outdoor end of the upper part 611 of the sliding member 61, and the tips are bent downward. After the eaves soffit board 1 is pushed toward the eaves base by the sliding member 61, the eaves end side trim edge 7A is attached to the fascia base 4 by a fastener 9, so that the pair of fixing plate parts 615 of the sliding member 61 abuts against the eaves end side trim edge 7A, reliably preventing the sliding member 61 from returning.

The eaves-side fixing bracket 6F shown in Figure 24 includes a slide member 61 (shown by a two-dot chain line) that can slide in a direction that presses the eaves top board 1 toward the eaves base, as shown in Figures 24(a) and (b), and a holding limiting member 62 that holds the slide member 61 slidably while limiting its return in the direction opposite to the pressing direction.

Instead of providing a pair of vertical plate parts that stand at right angles upward and constitute the fixed plate part 621 along both sides of the horizontal plate part, as in the case of the fixed plate part 62 in the eaves soffit structure shown in Figure 16, this holding and limiting member 62 has one vertical plate part that constitutes the fixed plate part 621 formed in the center of the tip edge of the eaves side of the horizontal plate part, as shown in Figures 27(a)(b)(c) and 28. In addition, a pair of second fixing plate parts 627 are provided that extend from both sides of the tip edge of the eaves side of the horizontal plate part toward the eaves side.

The fixing plate portion 621 has an insertion hole 622 into which a fastener 81 such as a nail or screw is driven to fix the retention limiting member 62 to the back surface of the fascia base 4. The retention limiting member 62 is fixed to the fascia base 4 by abutting the fixing plate portion 621 of the retention limiting member 62 against the back surface of the fascia base 4 and driving the fastener 81 into the insertion hole 622.

As shown in Figures 25(a), (b), (c) and 26, the slide member 61 comprises an upper part 611, a lower part 612 and a vertical plate part 613 connecting them. The upper part 611 is held by the holding and limiting member 62 to allow and limit movement, and an uneven part 614 is formed on the underside of the upper part 611. The lower part 612 is located below the eaves top board 1 and supports the eaves top board 1. The vertical plate part 613 faces the outdoor end face of the eaves top board 1 and is the part that pushes the eaves top board 1 towards the eaves base.

As shown in Figures 27(a), (b), (c) and 28, the retention and limiting member 62 is a metal piece having a horizontal plate portion and a vertical plate portion standing at a right angle in the center of the outdoor side of the horizontal plate portion, and the vertical plate portion constitutes the fixed plate portion 621.

The horizontal plate portion of the holding and limiting member 62 is cut with two slits parallel to the vertical plate portion, and the area between these slits is pressed downward by press working to integrally form a single bag portion 623 that encases the upper part 611 of the slide member 61 so that it can slide freely. This bag portion 623 is formed by cutting and raising a protrusion 624 that engages with the uneven portion 614 formed on the underside of the upper part 611 of the slide member 61.

In addition, a spring steel biasing portion 625 is provided on the underside of the bag portion 623 of the holding and limiting member 62 to press the eaves top board 1 against the lower portion 612 of the slide member 61. This spring steel biasing portion 625 presses the eaves top board 1 against the lower portion 612 of the slide member 61, so that even if there is variation in the thickness of the eaves top board 1 or the thickness of the eaves top board 1 is reduced due to aging, the undersides of adjacent eaves top boards 1 are aligned, so that when the eaves top boards 1 are viewed from below, no steps are created, and the appearance is good. The spring steel biasing portion 625 hangs down from the eaves base side to the eaves tip side, and the eaves base side is joined to the bag portion 623 by a burring rivet portion 626.

In addition, a fixed plate portion 615 is formed at the outdoor end of the upper portion 611 of the slide member 61, which extends toward the outdoor side on the same plane as the upper portion 611 and has a downwardly bent tip.

The holding and limiting member 62 is formed with a second fixing plate portion 627 that extends from both sides of the vertical plate portion constituting the fixing plate portion 621 toward the eaves side. This second fixing plate portion 627 and the horizontal plate portion are located on the same plane. The second fixing plate portion 627 is provided with an insertion hole 628 for the fastener 82 so that the holding and limiting member 62 can be fixed to the underside of the fascia base 4 by the fastener 82.

In the eaves soffit structure shown in Figure 23, a fixed plate portion 615 is formed at the outdoor end of the upper portion 611 of the sliding member 61, which extends outdoors on the same plane as the upper portion 611 and has a downwardly bent tip. After the sliding member 61 pushes the eaves soffit board 1 toward the eaves base, the eaves end side trim edge 7A is attached to the fascia base 4 with a fastener 9, so that the fixed plate portion 615 of the sliding member 61 abuts against the eaves end side trim edge 7A, ensuring that the sliding member 61 is prevented from returning.

As shown in FIG. 24(a), it is preferable to provide a protrusion 616 on the top surface of the indoor end of the upper part 611 of the slide member 61 to prevent the slide member 61 from slipping out of the bag part 623 of the hold limiting member 62 even if the slide member 61 is strongly pulled in the outdoor direction relative to the hold limiting member 62. Note that if the protrusion 616 is formed before inserting the bag part 623 into the hold limiting member 62 and assembling the slide member 61, it will cause problems when inserting the hold limiting member 62 into the bag part 623. Therefore, it is necessary to form the protrusion 616 by pressing after inserting the bag part 623 into the hold limiting member 62.

Next, Fig. 29 shows an embodiment using the eaves side fixing bracket 12B, which is a modified version of the eaves side fixing bracket 12A. The eaves side fixing bracket 12B also has an upper part 12a, a lower part 12b, and a rising part 12c connecting them, and has a cross section that is approximately U-shaped, like the eaves side fixing bracket 12A in the embodiment of Fig. 1. The upper part 12a has an insertion hole 12d for a fastener 13 such as a nail or a screw. The eaves side fixing bracket 12B in the embodiment of Fig. 29 is characterized in that, as shown in Fig. 30, both edges of the outdoor side end of the lower part 12b are partially cut and bent so that the approximately central part protrudes upward to form a spring-like shaped biasing part 12e. The tip hem of the biasing part 12e is at approximately the same height as the lower part 12b, and the biasing part 12e is gradually pressed downward by the underside of the eaves top board 1 that is inserted. This biasing portion 12e is pressed against the underside of the eaves top board 1, bending downward and pushing the eaves top board 1 upward in the direction of the upper portion 12a (thickness direction of the eaves top board 1).

31 and 32 show an embodiment using the eaves-side fixing bracket 12C, which is a modified version of the eaves-side fixing bracket 12A. The eaves-side fixing bracket 12C of this modified version has a spring steel biasing portion 20 on the upper portion 12a that presses the eaves top board 1 against the lower portion 12b. This spring steel biasing portion 20 presses the eaves top board 1 against the lower portion 12b of the eaves-side fixing bracket 12C, so even if there is variation in the thickness of the eaves top board 1 or the thickness of the eaves top board 1 is reduced due to aging, there is no step between adjacent eaves top boards 1 when the eaves top boards 1 are viewed from below, and the appearance is good. As shown in Figure 32, the spring steel biasing part 20 consists of a pair of spring pieces 201 that curve downward from the eaves side to the base side, and a connecting part 202 that connects the pair of spring pieces 201, and the connecting part 202 is joined to the eaves side of the upper part 12a by a burring crimp part 203. A nail hole 204 is provided in the center of the upper part 12a of the base side fixing bracket 12C to fix the base side fixing bracket 12C to the joist 2 with a fastener 13.

Figures 33 and 34 show an embodiment using an eaves-side fixing bracket 12D, which is a modified version of the eaves-side fixing bracket 12B shown in Figures 29 and 30. The eaves-side fixing bracket 12D shown in Figures 33 and 34 has a biasing portion 21 on the rising portion 12c, as shown by the two-dot chain line, that biases the eaves top board 1 toward the eaves end. The biasing portion 21 is made of a leaf spring, the center of which is fixed to the rising portion 12c by crimping, and the leaf spring is bent so that the ends farther from the central fixed position approach the end face of the eaves top board 1.

Figures 35 and 36 also show an embodiment using an eaves-side fixing bracket 12E, which is a modified version of the eaves-side fixing bracket 12B shown in Figures 29 and 30. As shown in Figure 36, the eaves-side fixing bracket 12E has an attachment section 23 in which the end of the upper part 12a is bent upward. This attachment section 23 has nail holes 24 for driving the fastener 13 into the joist 2. The eaves-side trim 11B used in this embodiment has an upper end bent upward to fit along the attachment section 23, and the fastener 13 is driven into this bent portion.

Next, Figures 37 to 48 show various types of joint fittings that are used to prevent lateral shifting and sagging at the joints of adjacent eaves boards 1 in the width direction, and to improve the fixing strength to rafters, etc.

The joint fitting 30A shown in Figures 37 to 39 consists of a vertical plate portion 31 located at the butt joint of adjacent eaves top boards 1 in the width direction, a pair of upper plate portions 32 provided on both sides above the vertical plate portion 31 and located on the upper surfaces of adjacent eaves top boards 1 in the width direction, and an insertion portion 35 provided on both sides below the vertical plate portion 31 and inserted into a female tongue portion 34 formed on the end surface of adjacent eaves top boards 1 in the width direction, and at least one of the pair of upper plate portions 32 located on the upper surfaces of adjacent eaves top boards 1 in the width direction is fastened to the base of the rafters 2, etc., with fasteners 84 such as nails or screws.

In the joint fitting 30A shown in Figures 37 and 38, one (on the left in the drawing) of a pair of upper panel parts 32 located on the upper surface of the eaves top boards 1 adjacent in the width direction is fixed to the base of the joist 2, etc., with fasteners 84 such as nails or screws, and this fixed side is formed longer in the width direction than the other side, forming an insertion hole 38 for the fasteners 84.

In addition, the butt joints of adjacent eaves top boards 1 in the width direction in Figure 37 are formed into a matching shape in which half of the board thickness is cut out to create an overlapping portion, and a female tongue portion 34 is formed in the overlapping portion.

As shown in Figure 39, the joint fitting 30A can also be used to join eaves top boards 1 that are adjacent in the width direction and have a straight butt end, with a female tongue 34 formed at this end.

Next, the joint fitting 30B shown in Figures 40 and 41 is a modified version of the joint fitting 30A shown in Figures 37 to 39, and is characterized in that both edges of the insertion portion 35 that is inserted into the female tongue portion 34 are formed with a springy, mountain-shaped biasing portion 37 that is partially cut and bent so that the approximate center protrudes upward. This biasing portion 37 prevents rattling between the insertion portion 35 and the female tongue portion 34 of the joint fitting 30B, and prevents sagging at the joint portion of adjacent eaves boards 1 in the width direction.

The joint fitting 30C shown in Figures 42 and 43 is a modified version of the joint fitting 30B shown in Figures 40 and 41, and is characterized in that a spring-loaded portion 37 having a mountain-shaped shape is formed on both edges of one of the insertion parts 35 that is inserted into the female tongue part 34, with a portion cut out and the roughly central part bent so as to protrude upward, and the insertion part 35 that is inserted into the other female tongue part 34 is provided with a spring-loaded portion 37 having a mountain-shaped shape bent so as to protrude upward in the central part.

Next, the joint fitting 30D in Figures 44 and 45 consists of a fixed plate 39 that is fixed vertically to the rafters 2, etc., a top plate 41 that is provided below this fixed plate 39 and is located on the top surface of the eaves top board 1, and a stopper part 40 that is provided on this top plate 41 and is inserted into the butt joint of adjacent eaves top boards 1 in the width direction.

As shown in Figure 44, this joint fitting 30D can prevent the adjacent eaves boards 1 from shifting sideways by inserting the stopper portion 40 into the butt joint of adjacent eaves boards 1 in the width direction, then positioning the top panel 41 on the top surface of the eaves board 1 and fixing the fixing plate 39 to the vertical surface of the fascia base, exterior wall or rafter 2 with fasteners 85 such as nails or screws. The fixing plate 39 of this joint fitting 30D has an insertion hole 42 formed therein through which the fasteners 85 such as nails or screws can be inserted.

Next, the joint fitting 30E in Figures 46 and 47 is a modified version of the joint fitting 30D in Figures 44 and 45, and is composed of a fixed plate 39 fixed to the vertical surface of the fascia base, the exterior wall, or the joist 2, an upper plate 41 provided below the fixed plate 39 and located on the upper surface of the eaves top board 1, and a stopper portion 40 provided on the upper plate 41 and inserted into the butt portion of the eaves top boards 1 adjacent in the width direction. In this joint fitting 30E, the upper plate 41 and the stopper portion 40 are formed separately. The upper plate 41 has a slit 43 that overlaps with the upper groove 36 provided in the butt portion of the eaves top boards adjacent in the width direction. The stopper portion 40 consists of an engagement plate portion 44 that overlaps with the upper surface of the upper plate 41, and an engagement portion 45 that fits into the upper groove 36 of the butt portion of the adjacent eaves top boards 1. The engagement plate portion 44 and the fitting portion 45 of the stopper portion 40 are formed by bending a plate material into a T shape.

As shown in Figs. 48 and 49, in the joint fitting 30E of Figs. 46 and 47, in order to facilitate the alignment of the slit 43 of the upper panel 41 with the upper groove 36 provided in the butt portion of the eaves boards 1 adjacent in the width direction, it is preferable to provide a positioning protrusion 46 on the underside of the upper panel 41 that engages with the upper groove 36 of the butt portion of the eaves boards 1 adjacent in the width direction.

1: Eaves top board 2: Rough edge 2b: Lower side portion 2c: Rising portion 3: Eaves base side support member 4: Fascia base 5: Eaves end side support member 6A, 6B, 6C, 6D, 6E, 6F: Eaves end side fixing bracket 6a: Upper side support piece 6b: Lower side support piece 6c: Hanging piece 6d: Mounting piece 6e: Insertion hole 6f, 6g, 6h: Pressing portion 6i: Protrusion 7A, 7B, 7C, 7D, 7E: Eaves end side parting edge 7a: Upper side portion 7b: Lower side portion 7c: Rising portion 7d: Insertion portion 7e: Water return piece 7f: Hanging portion 7g: Second lower side portion 7h: Third rising portion 7i: Second upper side portion 7j: Rising portions 8, 9, 13, 14, 17, 81, 82, 84, 85 : Fastening tool 10 : Ventilation hole 11A, 11B : Eaves side trim 11a : Upper side portion 11b : Lower side portion 11c : Rising portion 12A, 12B, 12C, 12D, 12E : Eaves side fixing metal fitting 12a : Upper side portion 12b : Lower side portion 12c : Rising portion 12d : Insertion hole 12e, 20, 21 : Pressing portion 15 : Thermal expansion fire retardant 16 : Second ventilation hole 18 : Third ventilation hole 19 : Fourth ventilation hole 23 : Mounting portion 24 : Nail hole 30A, 30B, 30C, 30D, 30E : Joint metal fitting 31 : Vertical plate portion 32 : Upper surface plate portion 34 : Female tongue portion 35 : Insertion portion 36 : Upper surface groove 37 : Pressing portion 38 : Insertion hole 39 : Fixing plate 40 : Stopper portion 41 : Upper surface plate 42 : Insertion hole 43 : Slit 44 : Engagement plate portion 45 : Fitting portion 46 : Positioning projection 61, 61E : Slide member 62, 62E : Holding and limiting member 201 : Spring piece 202 : Connection portion 203 : Burring rivet portion 204 : Nail hole 611 : Upper portion 612 : Lower portion 613 : Vertical plate portion 614 : Concave and recessed portion 615 : Fixing plate portion 616 : Projection 621 : Fixing plate portion 622 : Insertion hole 623 : Pocket portion 624 : Projection portion 625 : Pressing portion 626 : Burring rivet portion 627 : Second fixing plate portion 628 : Insertion hole

Claims (2)

In an eaves soffit structure in which the eaves base sides of adjacent eaves soffit boards in the width direction are supported on a rafter or exterior wall via an eaves base side support member, and the eaves tip side of the eaves soffit board is supported on a rafter or fascia base via an eaves tip side support member, a joint fitting is provided at the joint portion of adjacent eaves soffit boards in the width direction, the joint fitting comprising a fixed plate fixed to the vertical surface of the fascia base, exterior wall or rafter, an upper panel provided below the fixed plate and positioned on the upper surface of the eaves soffit board, and a stopper portion provided separately from the upper panel and inserted into the butt portion of adjacent eaves soffit boards in the width direction, the upper panel having a slit that overlaps with an upper surface groove provided in the butt portion of adjacent eaves soffit boards in the width direction, and the stopper portion comprising an engagement plate portion overlapping the upper surface of the upper panel and an engagement portion that is fitted into the upper surface groove of the butt portion of adjacent eaves soffit boards through the slit of the upper panel. The eaves structure according to claim 1, characterized in that the lower surface of the upper panel is provided with a positioning protrusion that engages with the upper surface groove of the butt joint of adjacent eaves panels in the width direction.

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