JPH03899B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a locking structure in a locking enclosure that has excellent workability, durability, and extremely good watertightness and strength.

[Conventional technology and its problems]

BACKGROUND ART Conventionally, metal tiled stick enclosures such as roofs or walls have been constructed. This tightening structure (locations other than the partial hanger attachment locations) is located at the inner tops a, a on both sides of the architectural board (groove board), as shown in solid lines in Figure 19.
Then, the hanging edges b, b on both sides of the cap material are folded back into a flat shape and crimped. Theoretically, watertight construction is possible with such tightening, but in reality, the inward apexes a, a of the architectural boards often undulate in the longitudinal direction, causing deformation and strain, and as a result, they are not flat. If the folding and crimping process is not performed strongly, a plurality of small gaps where capillary action acts will be formed between the inward apex a and the drooping edge b, making it easy for rainwater to enter the inside. In addition, because the fastening edge has an inward apex a that undulates in the longitudinal direction, it is often exposed to rainwater and is particularly prone to corrosion, resulting in poor rust prevention treatment and reduced durability. There were flaws.

[Means to solve the problem]

Therefore, the present invention forms vertical parts on both sides of the main plate, and forms an upper piece inward from the upper ends of both vertical parts,
The vertical part of the other side of the adjacent building board is brought into contact with the vertical part of one side of the building board, which has a folded edge bent below the inner end of the upper piece, and the flat chevron-shaped part is A cap material with drooping parts from both upper ends is fitted onto both opposing upper pieces of adjacent construction boards, and the base sides of both drooping parts are formed into an arc shape and folded downward to form the upper piece. The top part, the end edge and the hanging part are brought into close contact with each other, and an appropriate gap is formed between the top piece and the end edge, and both top pieces and both top parts are formed to be inclined outwardly and downwardly. Or, in the configuration of the above invention,
The ends of both hanging portions are brought into contact with the corners of the vertical portion of the construction board and the top piece, and an appropriate hollow portion is formed between the top piece and the hanging portion, or In the structure of the invention described above, an arcuate portion is formed that bulges outward in a mountain shape from the lower ends of both hanging portions of the cap material, and the ends of the arcuate portion are brought into contact with the vertical portion surface to form the second cavity. In addition, in the structure of the invention described above, a folded edge is formed inward from the outer ends of both arcuate parts of the cap material, and the folded edge is brought into contact with the vertical part surface. By forming the second cavity, the workability and durability are excellent, and the watertightness and strength are also extremely good, thus solving the above-mentioned problems.

〔Example〕

The first invention, as shown in FIGS. 4 and 16,
The arcuate portion 7, the folded edge 8, and the hollow portion 1
0, the second hollow part 11 etc. are not included as a component, and the upper piece 3
This is a tightening structure of the tightening outer body whose main constituent feature is that only an appropriate gap 9 is formed between the edge 4 and the edge 4.

Further, the second invention is that, as shown in FIGS. 5 and 17, the arcuate portion 7, the folded edge 8, the second hollow portion 11, etc. are not used as constituent elements, and the hollow portion 10 is formed. This is a fastening structure of the fastening outer body with the main constituent elements being:

Further, in the third invention, as shown in FIGS. 1, 2, and 18, the folded edge 8 is not used as a component, and the arcuate portion 7, the hollow portion 10, and the second hollow portion 11 are used. This is a fastening structure of the fastening outer body whose main constituent feature is the formation of a fastening structure.

Further, the fourth invention is as shown in FIGS. 6, 13, and 14.
As shown in the figure, this is a tightening structure of a tightening outer envelope whose main components include an arcuate portion 7, a folded edge 8, a hollow portion 10, and a second hollow portion 11.

Therefore, the members constituting the first to fourth inventions will be explained.

A is a metal construction board, in which vertical parts 2, 2 are formed on both sides of a main board 1, upper pieces 3, 3 are formed inwardly from the upper ends of the vertical parts 2, 2, and the upper pieces 3,
Edges 4, 4 bent in a folded manner are provided below the inner end of 3 (Figs. 1, 7, 1).
(See Figure 3, etc.) It is bent into a substantially arc shape from the upper piece 3 to the end edge 4. The main plate 1 may have a bottomed V-shaped portion 1a with a relatively high height formed in the middle thereof (see FIGS. 1 to 7), or may be simply formed into a flat plate shape (see FIG. 13). (See figures, etc.)

The architectural board A having the main board 1 in which the bottomed V-shaped portion 1a is formed is referred to as a folding plate type. Also,
Although not shown, in the case of forming the plate into a flat plate shape, it is also possible to form a corrugated shape by continuously forming low-height ribs perpendicular to the longitudinal direction. The architectural board A having the flat main plate 1 is referred to as a flat plate type. Each of the architectural boards A has a main board 1 vertical parts 2, 2 upper pieces 3, 3
It is composed of end edges 4, 4, which are formed by integrally forming a long metal plate using multistage upper and lower forming rolls.

B is a long cap material made of metal, and there are several types.

The first cap material B is shown in FIGS.
As shown in FIG. 6, in the structural member of the first invention, hanging portions 6, 6 are provided from both ends of the flat chevron portion 5.

As shown in FIGS. 5, 10, and 17, the second cap material B is a component of the second invention, and is provided with hanging portions 6, 6 from both ends of the flat chevron portion 5. , the ends of the hanging portions 6, 6 are slightly bent outward in an arc shape.

As shown in FIGS. 1 to 3, FIG. 11, and FIG. 6 are provided, and arcuate portions 7, 7 which bulge outward in a mountain shape from the lower ends of both the hanging portions 6, 6 are bent.

As shown in FIGS. 6 and 12 to 15, the fourth cap material B is a component of the fourth invention, and is provided with hanging portions 6, 6 from both ends of the flat chevron portion 5. , arcuate portions 7, 7 that bulge outward in a mountain shape from the lower ends of both hanging portions 6, 6 are formed in a bent manner;
Folded edges 8, 8 are bent inward from the outer ends of the arcuate portions 7, 7. At this time, an appropriate distance is formed between the arcuate portion 7 and the folded edge 8.

First, as shown in FIGS. 4 and 16, the fastening structure of the fastening enclosure of the first invention is such that the vertical part 2 on one side of the building board A is attached to the adjacent building board A. The vertical part 2 on the other side is brought into contact with the first cap material B.
(see FIG. 9) is fitted onto both opposing upper pieces 3, 3 of adjacent architectural boards A, A, and the base side of the hanging portion 6 is folded downward and crimped onto the back surface of the edge 4. At this time, the upper piece 3 and one side of the flat chevron portion 5 are connected to the edge 4
and the hanging portion 6 are brought into close contact with each other, an appropriate spacer portion 9 is formed between the upper piece 3 and the edge 4, and both upper pieces 3, 3, etc. are formed to be inclined outwardly and downwardly. .
At this time, it goes without saying that the end edge 4 and the hanging portion 6 are also formed to be inclined outwardly and downwardly.

Next, as the fastening structure of the fastening enclosure of the second invention, as shown in FIGS. 5 and 17, the vertical part 2 on one side of the building board A The vertical part 2 on the other side is brought into contact with the cap material B of the second embodiment (see FIG. 10), and the adjacent building board A,
Fitted into both opposing upper pieces 3, 3 of A, the hanging portion 6
Fold the base side downward and press-fit it to the back surface of the edge 4. At this time, the upper piece 3 and one side of the flat chevron-shaped part 5 are brought into close contact with the edge 4 and the hanging part 6, respectively, and the end of the hanging part 6 is brought into close contact with the vertical part 2 of the building board A. The upper piece 3 should be in contact with the corner of the upper piece 3.
An appropriate hollow part 10 is formed between the upper part 3 and the hanging part 6, and both upper pieces 3, 3, etc. are formed to be inclined outwardly and downwardly. At this time, the end edge 4 and the hanging portion 6 are also formed to have a steeper slope than the one side of the upper piece 3 and the flat chevron portion 5.

Next, as the locking structure of the locking outer enclosure of the third invention, as shown in FIGS. The vertical part 2 on the other side of the building board A is brought into contact with the cap material B of the third embodiment (see Figure 11) on both opposing upper pieces 3, 3 of the adjacent building boards A, A. The base side of the hanging portion 6 is folded downward and crimped onto the back surface of the edge 4. At this time, the upper piece 3 and one side of the flat chevron-shaped portion 5 are brought into close contact with the edge 4 and the hanging portion 6, respectively, and the corner portion of the hanging portion 6 and the arc-shaped portion 7 is placed in contact with the construction board. The vertical part 2 and the upper piece 3 of A are brought into contact with the corner points, and an appropriate hollow part 10 is formed between the upper piece 3 and the hanging part 6, and the end of the arc part 7 is is brought into contact with the surface of the vertical portion 2 to form a second hollow portion 11 between the vertical portion 2 and the arcuate portion 7. Both upper pieces 3, 3, etc. are formed to be inclined outwardly and downwardly. At this time, the end edge 4 and the hanging portion 6 are also formed to have a steeper slope than the one side of the upper piece 3 and the flat chevron portion 5.

Next, as the locking structure of the locking enclosure of the fourth invention, as shown in FIGS. 6, 13, and 14, the vertical part 2 on one side of the building board The vertical part 2 on the other side of the construction board A is brought into contact with the other side, and the cap material B of the fourth embodiment (see Fig. 12) is placed on both opposing upper pieces 3, 3 of the adjacent construction boards A, A. The base sides of the hanging portions 6, 6 are folded downward and crimped onto the back surface of the edge 4. At this time, the upper piece 3 and one side of the flat chevron-shaped portion 5 are brought into close contact with the edge 4 and the hanging portion 6, respectively, and the corner portion of the hanging portion 6 and the arc-shaped portion 7 is placed in contact with the construction board. The vertical part 2 and the upper piece 3 of A are brought into contact with the corner points, and an appropriate hollow part 10 is formed between the upper piece 3 and the hanging part 6, and the folded edge thereof is 8 is brought into contact with the surface of the vertical portion 2 to form a second hollow portion 11 between the vertical portion 2 and the folded end edge 8 of the arcuate portion 7. Both upper pieces 3, 3, etc. are formed to be inclined outwardly and downwardly. At this time, the end edge 4 and the hanging portion 6 are also formed to have a steeper slope than the one side of the upper piece 3 and the flat chevron portion 5.

The above-mentioned four fastening structures are fastening structures for the fastening enclosure other than where the hanger C is attached, and when actually constructing the fastening outer enclosure such as a wall or roof, it is necessary to use the hanger C etc. It is necessary to install the

In the above four inventions, there are a folding type and a flat plate type, and a hanger C also exists correspondingly.

Folded type architectural board A (see Figure 1, etc.)
As shown in FIG. 1, FIG. 3, FIG. 8, etc., the mounting hanger C of
b is formed, upper surface portions 12c, 12c are formed that are slightly inclined inwardly and outwardly from the upper end of the rising portion 12b, and drooping end edges 12d, 12d are integrally formed from the outer ends of the upper surface portions 12c, 12c. A washer 12e made of a relatively thick material is fixed on the bottom 12a, and a through hole is bored in the bottom 12a of the washer 12e. , 12d is a single metal plate that is folded back at the end of the bottom portion 12a and is continuously integrated. Also, this hanger C (see Figure 8)
The bottom part 12a may be shaped without the washer 12e, and a through hole may be bored in the center hole of the rising part 12b.

In addition, as shown in FIGS. 13 and 15, the hanger C for attaching the flat type construction board A (see Fig. 13, etc.) is the same as the folding type construction board A (see Fig. 1, etc.). The shape is obtained by removing the washer 11e from the hanger C for mounting (see).

In the figure, reference numeral 13 denotes a chevron-shaped receiving metal fitting, in which bottom portions 13b are integrally formed at the lower ends of both inclined sides of a chevron-like portion 13a. A through-hole or an internal thread is provided at the top of the mountain-like portion 13a. 14 is the crossbeam or main building;
Structural materials such as the trunk rim, 15 are wood wool boards, foamed synthetic resin,
Insulating material such as rock wool.

The flat plate type architectural board A (see Figure 7, etc.)
To attach the construction board A to the hanger C, etc., place the construction board A on the angle-shaped bracket 13, and attach the suspension of the first embodiment to the upper edge 3 edge 4 of one side of the construction board A. Child C (See Figure 8)
While locking the hanging edge 12d of the upper surface part 12c, the bottom part 12a and the washer 12e are fixed to the stepped part of the mountain part 13a with bolts 16 or the like, and the vertical part on the other side of the adjacent building board A is fixed. 2 upper piece 3 to the rising part 12 of the hanger C
b The upper surface part 12c is inserted into the hanging edge 12d, and the flat chevron-shaped part 5 of the cap material B is connected to the hanging edge 12d, 1 of the hanger C.
Fits into 2d. In the subsequent processing, the first
This is carried out in the same manner as the structure of the tightening structure of the tightening outer body in the fourth embodiment (see FIG. 3).

In addition, when attaching a flat type construction board A (see Fig. 13, etc.) to a hanger C, etc., place the same construction board A on the top surface of the structural material 14 or the heat insulating material 15, etc.
The top surface portion 12c of the hanger C (see FIG. 15) of the second embodiment is secured to the edge 4 of the upper piece 3 on one side of the same architectural board A, and the bottom portion 12a thereof is locked. It is fixed to the structural material 14 or the heat insulating material 15 with bolts 16, etc., and the upper piece 3 of the vertical part 2 on the other side of the adjacent building board A is connected to the hanging edge of the rising part 12b of the hanger C. 12d, and the subsequent processing is done in the same way as the folding type architectural board A (No. 13
(see figure). Installation construction of such a hanger C point,
In conjunction with the above-mentioned construction of the locking structure, a locking outer enclosure such as a roof or wall is constructed.

〔Effect of the invention〕

First, the invention described in claim 1 (first claim)
invention), there are vertical parts 2, 2 on both sides of the main plate 1.
, upper pieces 3, 3 are formed inwardly from the upper ends of the vertical parts 2, 2, and end edges 4, 4 are bent downward from the inner ends of the upper pieces 3, 3. A cap material in which the vertical portion 2 on one side of the formed architectural board A is brought into contact with the vertical portion 2 on the other side of the adjacent architectural board A, and hanging portions 6, 6 are provided from both ends of the flat chevron-shaped portion 5. B is fitted onto both opposing upper pieces 3 of the adjacent architectural boards A, A, and the base side of the hanging part is formed into an arc shape, and folded downward to form the upper piece 3 and the flat chevron-shaped part 5. one side, the edge 4 and the hanging part 6 are brought into close contact with each other, and the upper piece 3 is
By forming an appropriate spacer portion 9 between the edge 4 and the edge 4, and forming both upper pieces 3, 3, etc. of the spacer 9 in an outwardly downwardly inclined shape, firstly, the tightening workability is good; Second, the fastening part can be well prevented from rusting, which in turn enables long-term quality assurance, making it extremely durable. Third, it has good watertightness (rain protection), and fourth. It has many effects such as particularly good strength.

To explain these effects in detail, the drooping portion 6
By forming the base side into an arc shape and folding it downward, there is no need for the flat folding process that was conventionally required. However, simply folding it into an arc shape does not require such a large force, and can be formed with a relatively small force, which requires less effort when tightening with a manual tightening machine. Efficient tightening processing can be performed with less work. In addition, with an electric tightening machine, even if the drive source is small, extremely efficient tightening processing can be performed. Furthermore, by folding it in an arc shape, there are almost no cracks or the like at the folded part, and the entire fastened part has excellent corrosion resistance, and its durability can be maintained over a long period of time. In recent years, there has been a particular demand for fastened enclosures such as roofs that have excellent corrosion resistance and are durable.
The present invention satisfies the requirement for durability guaranteed for 10 to 20 years.

Further, by bringing the upper piece 3 and one side of the flat chevron-shaped portion 5 into close contact, and by bringing the edge 4 and the hanging portion 6 into close contact with each other, it is possible to eliminate any room for capillary phenomenon to occur, and furthermore, by bringing the upper piece 3 and one side of the flat chevron-shaped portion 5 into close contact with each other, it is possible to eliminate the room for capillary phenomenon to occur. The gap 9 between the edge 4 and the edge 4 can prevent capillary action, can block rainwater from entering from the tightening area, and can provide a tightening structure with good watertightness (rain closure).

Further, the base side of the hanging portion 6 is formed into an arc shape and folded downward to bring the upper piece 3 and one side of the flat chevron portion 5 into close contact with each other, and the end edge 4 and the hanging portion 6 are brought into close contact with each other. By forming both upper pieces 3, 3, etc. in an inclined shape facing outward, a large wind (negative pressure) is applied to the architectural board A, lifting the main plate 1 of the architectural board A upward, and at the same time Even if a force that pulls the vertical portion 2 downward acts, the upper piece 3 is difficult to shift downward, and the strength of the tightened portion can be increased.

Next, the invention described in claim 2 (second claim)
In the invention), the ends of both hanging portions 6, 6 of the cap material B in the configuration of the first invention are brought into contact with the corner points of the vertical portion 2 and the top piece 3 of the building board A, and the top By forming an appropriate hollow part 10 between the piece 3 and the hanging part 6, in addition to achieving the same effect as the first invention, first of all, the strength of the fastening part is further increased. This provides an extremely strong locking structure, and secondly, it has the effect of improving watertightness (rain protection).

To explain these effects in detail, both upper pieces 3, 3, etc. are formed to be inclined outwardly downward, and the ends of both hanging parts 6, 6 are connected to the vertical part 2 of the building board A.
Since the construction board A is brought into contact with the corner of the top piece 3, a large wind pressure (negative pressure) is applied to the construction board A, lifting the main board 1 of the construction board A upwards, and at the same time lifting the main board 1 of the construction board A upward. Even if a force is applied to pull it downwards, the end of the hanging portion 6 will not touch the vertical portion 2 of the building board A.
The vertical part 2 is kept in a pressed state by coming into contact with the corner part of the upper piece 3, so that the vertical part 2 can hardly shift downward. The strength of the tightened area can be further increased.

In addition, the presence of the hollow part 10 can prevent the capillary phenomenon of rainwater, and can reliably block rainwater from entering from the tightening area, providing a tightening structure with excellent rain closure (watertightness). can. The structure of the values is the same as the invention of item 1, and similarly, the fastening workability is good, and the rust prevention of the fastening part is also good, and long-term quality assurance is possible, and it is extremely durable. It can be made into something excellent.

Next, the invention described in claim 3 (third claim)
In the invention), arcuate portions 7, 7 are formed which bulge outward in a mountain shape from the lower ends of the both hanging portions 6, 6 of the cap material B in the configuration of the second invention, and the hanging portions 6 and The corner of the part 7 is brought into contact with the corner of the vertical part 2 of the building board A and the upper piece 3, and an appropriate empty part 10 is provided between the upper piece 3 and the hanging part 6. By forming the second hollow part 11 by bringing the end of the arcuate part 7 into contact with the two surfaces of the vertical part,
In addition to exhibiting the same effect as the second invention, the second hollow part 11 can also prevent the capillary phenomenon of rainwater.
0, it is possible to create a double rainwater infiltration blocking structure, and provide a locking structure with extremely excellent rain closure (watertightness). Also, since the end of the arcuate portion 7 was brought into contact with the two vertical portions, a large wind pressure (negative pressure) was applied to the architectural board A.
is applied to lift the main plate 1 of the building board A upward, and at the same time lift its vertical part 2 downward and inward (main plate 1
Even if a tensile force acts on the vertical part 2, the lower position of the vertical part 2 is pressed, thereby reinforcing the strength of the vertical part 2 and further increasing the strength of the tightening structure. Can be done. Furthermore, the presence of the arcuate portion 7 allows the ends of the cap material B to be neatly shaped without being wavy in the longitudinal direction, thereby increasing the section modulus and making it stronger.

Next, the invention described in claim 4 (fourth claim)
In the invention), folded edges 8, 8 are formed inwardly from the outer ends of the arcuate portions 7, 7 of the cap material C in the configuration of the third invention, and the folded edges 8 are formed on the two vertical sides. By abutting to form the second hollow portion 11, in addition to achieving the same effect as the third invention, firstly, rust prevention can be improved and a durable fastening structure can be provided.

To explain these effects in detail, the corrosion of the clamped parts generally begins at the clamped ends, and the corrosion due to battery action (commonly known as ``electrical corrosion'') quickly spreads to the entire clamped part. However, when both folded edges 8, 8 are in contact with the vertical part 2 of the building board A, the extreme ends of the folded edges 8, 8 are in contact with the arcuate part 7 and the vertical part 2. The end portion of the cap material B can be made to be extremely resistant to corrosion, and the fastened portion as a whole has excellent corrosion resistance. Durability can be maintained over a long period of time.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the third invention made into a folding type;
Figure 2 is a longitudinal sectional front view of the main part of Figure 1, and Figure 3 is a front view of the main part of Figure 1.
Fig. 4 is a longitudinal sectional front view of the main part of the first invention, Fig. 5 is a longitudinal sectional front view of the main part of the second invention, and Fig. 6 is a longitudinal sectional front view of the main part of the second invention. A longitudinal front view of the main part, Figure 7 is a perspective view of a folding type construction board,
FIG. 8 is a perspective view of the angle-shaped receiving bracket with a hanger, FIGS. 9 to 12 are perspective views of the cap material, FIG.
Fig. 3 is a longitudinal sectional front view of the main part, Fig. 15 is a longitudinal sectional front view of the locking structure at the hanger location in Fig. 13, Fig. 16 is a longitudinal sectional front view of the main part of the flat plate type first invention, and Fig. 17 is a longitudinal sectional front view of the main part of the first invention of the flat plate type. Main part longitudinal sectional front view of the flat plate type second invention, No. 18
The figure is a longitudinal sectional front view of the main part of the third invention of the flat plate type, and FIG. 19 is a sectional view of the conventional locking structure. A... Architectural board, B... Cap material, 1... Main plate, 2... Vertical part, 3... Top piece, 4... End edge, 5
...flat chevron-shaped part, 6... hanging part, 7... arc-shaped part, 8... folded edge, 9... intervening part, 10...
...Empty part, 11...Second empty part.

Claims (1)

[Claims] 1. Vertical parts are formed on both sides of the main plate, an upper piece is formed inwardly from the upper ends of the vertical parts, and an end edge is bent downward from the inner end of the upper piece. The vertical part of the other side of the adjacent building board is brought into contact with the vertical part of one side of the building board that has been formed, and the cap material with hanging parts from both ends of the flat chevron part is attached to the vertical part of the adjacent building board. Fits onto both opposing upper pieces, forms the base side of the hanging part into an arc shape, and folds downward to tightly fit the upper piece and one side of the flat chevron-shaped part, and the edge and the hanging part, respectively. A locking structure in a locking outer enclosure, characterized in that a suitable gap is formed between the upper piece and the end edge, and both upper pieces are formed to be inclined outwardly and downwardly. 2 Architectural board with vertical parts formed on both sides of the main board, an upper piece formed inward from the upper ends of both vertical parts, and an edge bent downward from the inner end of the upper piece. The vertical part of one side of the building board is in contact with the vertical part of the other side of the adjacent building board, and a cap material with hanging parts from both ends of the flat chevron-shaped part is attached to both opposing top pieces of the adjacent building board. The base side of the hanging part is formed into an arc shape, and the upper piece is brought into close contact with one side of the flat chevron-shaped part, and the edge and the hanging part are brought into close contact with each other. The ends of the parts are brought into contact with the corner points of the vertical part of the construction board and the top piece, an appropriate space is formed between the top piece and the hanging part, and both top pieces are placed outside. A fastening structure in a fastening outer body characterized by being formed in a downwardly sloping shape. 3 Architectural board with vertical parts formed on both sides of the main board, an upper piece formed inward from the upper ends of both vertical parts, and an edge bent downward from the inner end of the upper piece. The vertical part on one side is brought into contact with the vertical part on the other side of the adjacent construction board, and a part is provided hanging down from both ends of the flat chevron-shaped part, and it expands outward in a chevron-shape from the lower end of both hanging parts. The cap material with the extended arc-shaped part is fitted onto both opposing upper pieces of the adjacent construction board, and the base side of the hanging part is formed into an arc shape, and then folded downward to form the upper piece and the flat chevron-shaped part. One side, the edge and the hanging part are brought into close contact with each other, and the corner part of the hanging part and the arc part is brought into contact with the corner part of the vertical part of the construction board and the top piece. , there is an appropriate space between the upper piece and the hanging part.
A fastened outer enclosure characterized in that the end of the arc-shaped part is brought into contact with the vertical part surface to form a second hollow part, and both upper pieces of the second hollow part are formed so as to be inclined outwardly and downwardly. Fastening structure. 4 Architectural board with vertical parts formed on both sides of the main board, an upper piece formed inward from the upper ends of both vertical parts, and an edge bent in a folded shape downward from the inner end of the upper piece. The vertical part on one side is brought into contact with the vertical part on the other side of the adjacent construction board, and a part is provided that hangs down from both ends of the flat chevron-shaped part, and expands outward in a chevron-shape from the lower ends of both hanging parts. A cap material having a protruding arcuate part and a folded end edge inward from the outer end of the arcuate part is fitted onto both opposing upper pieces of the adjacent architectural board, and the base side of the hanging part is fitted. is formed into an arc shape and folded downward to bring the upper piece and one side of the flat mountain-shaped part into close contact with each other, and the edge and the hanging part, respectively, and the corner point between the hanging part and the arc part is constructed. The vertical part of the plate is brought into contact with the corner of the upper piece, an appropriate space is formed between the upper part and the hanging part, and the folded edge is brought into contact with the surface of the vertical part. A fastening structure in a fastening outer enclosure, characterized in that a second hollow part is formed in contact with the second hollow part, and both upper pieces thereof are formed to be inclined outwardly and downwardly.