JPH04258449A - Exterior structure for building - Google Patents

Abstract

PURPOSE:To prevent intrusion of backflow of rainwater in the case of strong wind and rain by a method wherein a step rising toward the surface side at a specified angle is formed on a specified position on a female engaging part of an exterior panel, to which the engaging female part and an engaging male part are formed respectively to its upper and lower edges. CONSTITUTION:An engaging female part 3a is formed by folding back and an engaging male part 4a is formed by folding down respectively along the upper and lower edges of an exterior plate 2. A rising step 5 is formed at an angle of 90+ or -15 degree on a position within 10mm from the lower end 4b of the lower edge of the engage exterior plate on the engaging female part 3a side. Then horizontal roofing is made on backing 1, employing the exterior plates 2. With such a structure, backflow of rainwater can be dispersed by the step 5 and intrusion of the rainwater into the engaging part can be prevented. Thereby satisfactory waterproofness is ensured even in the case of strong wind and rain.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exterior structure for buildings that exhibits reliable waterproof properties in times of strong wind and rain, and more particularly to an exterior structure for use on roof surfaces.

0002

[Prior Art] Conventionally, some architectural exterior structures used for building roofs, side walls, etc. required reliable waterproofness.
Some have a band-shaped exterior plate made of metal plate or the like that is covered on the base of the side walls of the roof.

0003

[Problem to be solved by the invention] As shown in FIG.
The exterior plate 101 used in the above-mentioned architectural exterior structure has a band shape, and forms an upper edge molded part 102 that is folded back toward the surface side along its upper edge to have a substantially hook-shaped cross section, and also forms an upper edge molded part 102 at the lower edge of the exterior plate 101. A lower edge molded portion 103 is formed and is folded back toward the back side along a substantially U-shape.

[0004] The exterior plate 101 is horizontally laid on a roof base 104, for example, and the upper and lower edges of the vertically adjacent exterior plates 101 are engaged with each other to form the exterior. The plates 101 are joined together.

As described above, according to the exterior structure covered with the exterior panels 101, the joints 105 between the exterior panels 101 can prevent rainwater from entering within the range of normal wind and rain. , with practical waterproof properties.

[0006] However, under conditions of strong winds and rain such as typhoons and torrential rains, specifically conditions with wind speeds of 40 m or more and rainfall of 10 mm or more, rainwater flowing down the roof surface is blown up along the slope of the roof in strong pulsations. Due to the influence of wind pressure, a phenomenon occurs where water flows backwards toward the ridge.

[0007] As shown in FIG.
05 on the rising surface, and with more force, it concentrates on the gap 105a at the corner of the rising part and penetrates into the interior of the exterior plate 101. In severe cases, it penetrates into the base 104 and leaks occur.

The present invention provides the above-mentioned architectural exterior structure with means for preventing rainwater flowing back along the slope of the roof due to the influence of strong winds from concentrating in the gaps between the joints of the exterior panels. The goal is to improve waterproofness under strong winds and rain.

[0009]

[Means for Solving the Problems] In order to solve the above-mentioned problems, the architectural exterior structure of the present application forms an upper edge molded part that is folded back toward the surface side along the upper edge of the band-shaped exterior plate main body, and A lower edge molded part is formed by folding back to the back side along the lower edge of the exterior board body, and this exterior board is joined by engaging both the upper and lower edge molded parts adjacent to each other on the base of the building exterior. In the horizontally-roofed architectural exterior structure, a stepped portion rising from the surface of the exterior board is formed along the lower side of the joint between the exterior boards.

[0010] It is effective that the above-mentioned stepped portion is formed within 10 mm from the lower end of the lower edge molded portion at the joint portion.

[0011] Furthermore, it is preferable that the raised surface of the stepped portion be raised at an angle of about 90 degrees plus or minus 15 degrees with respect to the exterior surface.

[0012] It is effective that the height of the stepped portion is 3 mm or more from the surface of the exterior plate. Furthermore, the length of the exterior plate can also be made to a fixed length.

[0013]

[Operation] Next, the operation will be explained based on the case where the above-mentioned means is used on a roof surface. Each of the exterior panels, which are horizontally roofed one after another on the base of the roof surface, is joined to each other by the engagement of the upper and lower edge molding parts of the upper and lower adjacent panels, and the joints A step portion rising from the surface of the exterior plate is formed along the lower side of the plate.

[0014] During strong winds and rain, rainwater flows back down the slope of the roof due to the influence of pulsating winds blowing up along the slope of the roof. The flow of wind and rain flowing backwards on the roof surface first strongly hits the step at each joint, and due to inertia it jumps over the gap between the joints located behind the step and scatters into the air. This prevents the backflow of rainwater from directly hitting the gap between the joints, and prevents rainwater from entering through the gap.

[0015] By setting the formation position of the step part within 10 mm from the lower end of the lower edge molding part at the joint part, as described above, the water flows backward down the slope of the roof, hits the step part, and flows toward the ridge side. In the flow of rainwater that scatters after jumping over a certain distance, the lower end of the lower edge molding, that is, the gap at the joint part, is located within the jump distance of the flow behind the step, and the flow of rainwater jumps over that gap. .

[0016] Furthermore, by setting the angle of the rising surface of the step to about 90 degrees plus or minus 15 degrees with respect to the slope of the roof, the flow of rainwater flowing backwards on the slope of the roof can be prevented from flowing behind the step. You will be able to jump over it clearly.

[0017] By ensuring the height of the step is at least 3 mm from the surface of the exterior plate, the reaction when the backflow of rainwater hits the step will be directed upwards, ensuring that it will jump over the back of the step. .

[0018]

[Effects of the Invention] Since the present invention is constructed as described above, it achieves the following effects. Since a stepped portion is formed along the lower side of the joint between the exterior panels, for example, when the exterior structure of the present application is used on the roof of a building, the flow of wind and rain that flows backwards on the roof due to the influence of strong winds will be prevented. ,
It strongly hits the step, and due to inertia, it jumps over the gap between the joints located behind the step and becomes scattered into the air. Therefore, it is possible to effectively prevent the infiltration of rainwater, which occurs in conventional exterior structures due to backflow of rainwater concentrating in the gaps between the joints, and exhibits good waterproof performance even in strong winds and rain. be able to.

By locating the above-mentioned step part within 10 mm from the lower end of the lower edge molding part at the joint part, in the flow of rainwater flowing backward along the slope of the roof,
The gap between the joints of the exterior panels, which is the entry point for water intrusion, can be placed within the flow jump range behind the step and removed from the mainstream of the flow, and as a result, the probability of rainwater entering through the gaps at the joint is greatly reduced. can be reduced.

[0020] Also, 9
By setting it up at an angle of about 0 degrees plus or minus 15 degrees, the flow of rainwater that flows backwards on the slope of the roof will be able to pass over the back of the step, and this will also allow rainwater to flow through the gap between the joints. It is possible to reliably prevent the infiltration of

[0021]The height of the stepped portion is set to 3 from the surface of the exterior plate.
If it is set to mm or more, the reaction when the backflow of rainwater hits the step will be directed upwards and will surely jump over the back of the step, making it more effective to prevent rainwater from entering the gap between the joints. can be prevented.

Furthermore, by making the length of the exterior plate a fixed length, the manufacturing efficiency of the exterior plate itself and the work efficiency during construction can be greatly improved.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. 1 to 3 show the case where the exterior structure of the present application is implemented on a roof surface, and is constructed by horizontally covering a strip-shaped exterior plate 2 on a base 1 of the roof. The roof base 1 described above is constructed by laying a base sheet 1b such as asphalt roofing on the surface of plywood 1a.

The exterior plate 2 is made of a regular or long strip-shaped metal plate, and an upper edge molded portion 3 is formed along the upper edge of the body of the exterior plate 2 by roll forming and press forming. A lower edge molded portion 4 is formed along the lower edge of the main body of the plate 2.

Both the upper and lower molded parts 3 and 4 of the exterior board 2 are engaged with each other when the exterior boards 2 are successively horizontally laid on the base 1, so that the exterior boards 2 adjacent to each other in the upper and lower tiers are connected to each other. It is for joining and assembling. And the lower edge molding part 4
As shown in FIG. 1, the lower edge of the main body of the exterior plate 2 is bent toward the back side into a substantially U-shape, and the tip end facing toward the upper edge is folded back to form an engaging piece 4a.

Furthermore, the upper edge molded portion 3 forms an engagement recess 3a with a generally hook-shaped cross section that opens toward the lower edge by folding the upper edge of the main body of the exterior plate 2 multiple times. A fastening piece 3b for nailing and fixing the exterior plate 2 to the base 1 is formed by bending the tip end extending upward from 3a into a groove-shaped cross section.

Normally, in order to horizontally roof the exterior board 2,
Exterior board 2 Lay parallel to the ridge of the roof, one by one from the ridge side to the eave side. When the above-mentioned exterior board 2 is laid horizontally on the base 1, as shown in FIG. By inserting the piece 4a into the engagement recess 3a of the lower edge molded part 4 of the exterior plate 2 located on the lower stage side, the vertically adjacent exterior plates 2 are sequentially joined and assembled.

[0028] Furthermore, the left and right ends of the exterior plate 2 are joined together as follows:
This is done by placing a sacrificial board or the like on the back side of the joint.

[0029] The joint 6 between the exterior plates 2 assembled in a gap is as follows:
As described above, at the same time that the engaging piece 4a is inserted into the engaging recess 3a and engaged, the lower edge molded portion 4 having a substantially U-shaped cross section
By tightly covering the upper surface of the upper edge molded part 3 of the engagement partner, the joint part 6 has the same waterproof property as a conventional joint part covered with metal plates.

[0030] By making the above-mentioned exterior board 2 a fixed length, it is possible to improve the manufacturing efficiency of the exterior board 2 itself, and also to greatly improve workability.

[0031] In the above-mentioned exterior plate 2, a stepped portion 5 is formed parallel to the lower side of the upper edge molded portion 3.

The stepped portion 5 is formed in such a manner that it rises one step from the surface of the lowest part of the exterior plate 2, but the height of the step, the angle of the rising surface, and the positional relationship with the gap 6a in the joint portion 6 are important. . Specifically, the gap 6a is formed at a height of about 3 mm to 10 mm from the surface of the exterior board 2 and stands up approximately at right angles with the slope of the roof as a reference, and is located at the lower end of the lower edge molded part 4. It is formed so that it is located within 10 mm below the entrance.

As described above, the exterior structure implemented on the roof surface has waterproofness against normal wind and rain like the conventional metal plate roof structure, and also has high waterproofness that can withstand conditions of typhoons and torrential rain. It is also equipped with

For example, under strong winds and rain with a wind speed of 40 meters or more, rainwater falling on the roof surface will flow back toward the ridge due to the strong pulsating wind blowing up along the slope of the roof.

The flow of wind and rain flowing backward on the roof surface first strongly hits the step 5 at each joint 6, and the inertia generated at that time is directed upward under the influence of the step 5. Therefore, the flow jumps over the gap 6a of the joint part 6 located behind the step part 5, hits the upper part and corner part of the rising surface 4b of the lower edge molded part 4, and then scatters into the air.

[0036] Therefore, rainwater flowing back on the roof surface is
Due to the presence of , the water flows over the gap 6a of the joint 6. As a result, a space a is created behind the stepped portion 5 where the flow does not reach, and the gap 6a, which serves as the inlet of flooded water, is located within this space a, and the phenomenon of direct backflow of rainwater being hit is avoided. Ru. As a result, water intrusion through the gap 6a of the joint portion 6 is effectively prevented.

As described above, the step portion 5 is formed at the lower end of the lower edge molded portion 4 in the joint portion 6, that is, at the gap 6.
By setting the distance within 10 mm below the entrance of space a, as described above, in the flow of rainwater that flows backwards on the slope of the roof, hits the step 5, jumps over the distance of space a, and then scatters, A gap 6a can be placed within the flow jump distance (space a) behind the stepped portion 5, thereby reliably preventing water from seeping through the gap 6a.

Furthermore, setting the angle of the rising surface of the stepped portion 5 to the slope of the roof at an angle of about 90 degrees plus or minus 15 degrees means that the flow of rainwater flowing backwards on the slope of the roof can be prevented by the slope of the stepped portion 5. This is an important element in order to be able to jump over the area behind you cleanly.

Furthermore, by ensuring the height of the stepped portion 5 to be 3 mm or more from the surface of the exterior plate 2, backflow of rainwater is prevented from reaching the stepped portion 5.
The reaction when the rainwater hits the step part 5 is actively directed upward, which allows the backflow of rainwater to largely jump over the back of the step part 5.

With the exterior plate structure constructed according to the above-mentioned conditions, it was experimentally confirmed that the wind speed was 60 meters and the rainfall amount was 67 meters.
It has been confirmed that there is no water leakage even under conditions of 0 mm.

The exterior structure of the present invention can be applied not only to roof surfaces as described above, but also to vertical walls such as building peripheral walls.

[0042] Furthermore, in the exterior structure of the present application, it is also possible to apply it to both the upper and lower edge molding parts when the exterior panels 2 are vertically roofed to a fixed length on the surface of the roof of a building, etc. In this way, even if carried out, the good waterproof performance during strong winds and rain will not change (not shown).

FIGS. 4 to 12 show other embodiments of the flap assembly structure using the exterior plate 2, and these embodiments will be explained below in order.

In the exterior plate 2 having the structure shown in FIG. 4, a wave-folded portion 13b is formed at the tip of an upper edge molded portion 13 which is folded back to have a substantially hook-shaped cross section so as to open toward the eaves. Further, a lower edge molded portion 14 that is an engagement partner of the upper edge molded portion 13 is provided.
The engagement piece 14a at the tip is bent into a chevron shape and brought into elastic contact with the intermediate portion of the wave-folded portion 13b. Further, the corners of the lower edge molded portion 14 are bent in two stages, and the tip of the wave-folded portion 13b is brought into contact with the back surface of this corner portion, thereby increasing the watertightness of the joint portion 16. Further, in this embodiment, the rising surface 14b of the lower edge portion 14 is raised substantially at right angles to the sloped surface of the roof.

The embodiment shown in FIG. 5 is constructed in substantially the same manner as that shown in FIG. .

The embodiment shown in FIG. 6 is constructed so that the rise of the joint portion 26 can be suppressed by making the engaging portion between the engaging piece 24a and the engaging recess 23a and the fastening piece 23b thinner. It is.

The structure shown in FIG. 7 has the same basic structure as that shown in FIG.
By forming the stepped portion 30 on the joint surface between the upper edge molded portion 33 and the upper edge molded portion 33, rainwater that enters from the gap 36a of the engaging portion 36 is prevented from penetrating deeper than the stepped portion 30 described above. do.

In the embodiment shown in FIG. 8, the rising surface 44b of the lower edge molded portion 44 is largely tilted. Furthermore, by bringing the wave-folded part 41 formed in the middle of the engagement piece 44a of the lower edge molded part 44 into contact with the stepped part 40 formed in the upper edge molded part 43, rainwater is prevented from entering through the gap 46a. ing.

In the embodiment shown in FIG. 9, a step portion 50 is provided in the middle of the lower edge forming portion 54 that engages with the upper edge forming portion 53, and a small space 51 is formed in the engaging portion, so that the gap can be removed. It is designed to drain infiltrating rainwater.

The embodiment shown in FIG. 10 has basically the same structure as the embodiment shown in FIG.
A step portion 52 similar to the step portion 50 of the engagement piece 54a is also provided on the joint surface of the upper edge molded portion 53. Therefore, the synergistic effect of the small space 51 in the engaging portion and the draining step portion 52 can prevent rainwater from entering through the gap 56a.

The embodiment shown in FIG. 11 has a protruding wall portion 60 rising upward in the intermediate portion from the upper edge molded portion 63 bent to have a substantially hook-shaped cross section to the fastening piece 63b extending toward the ridge. This structure improves the water intrusion prevention function.

In the embodiment shown in FIG.
The rising surface 74b of the folded part 70 and the tip part 7 formed on the extending part of the upper edge molded part 73 are greatly inclined.
1 and the back surface of the lower edge molded part 74, and the joint part 76
It has improved watertightness.

In each of the above-mentioned embodiments, the structures of the joints between the sheath-assembled exterior plates 2 are different, but the components related to the step portion 5 are the same as those shown in FIG. do not have.

[0054] The above-mentioned exterior plate may be formed from a metal plate or may be formed by extrusion molding of resin or the like.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional front view showing a joint part of an architectural exterior structure in which the present application is implemented.

FIG. 2 is a perspective view showing a longitudinal section of an exterior plate of the same architectural exterior structure.

FIG. 3 is a perspective view showing a cross section of a roof surface on which the same architectural exterior structure is implemented.

FIG. 4 is a longitudinal cross-sectional view showing an embodiment of the exterior plate structure in which the flaps are assembled.

FIG. 5 is a longitudinal cross-sectional view showing an example of the exterior plate structure in which gaps are assembled.

FIG. 6 is a longitudinal cross-sectional view showing an example of the exterior plate structure in which the flaps are assembled.

FIG. 7 is a longitudinal cross-sectional view showing an example of the exterior plate structure in which the flaps are assembled.

FIG. 8 is a longitudinal cross-sectional view showing an example of the exterior plate structure in which the flaps are assembled.

FIG. 9 is a longitudinal cross-sectional view showing an example of the exterior plate structure in which the flaps are assembled.

FIG. 10 is a longitudinal cross-sectional view showing an example of the exterior plate structure in which the flaps are assembled.

FIG. 11 is a longitudinal cross-sectional view showing an example of the exterior plate structure in which the flaps are assembled.

FIG. 12 is a longitudinal cross-sectional view showing an example of the exterior plate structure in which the flaps are assembled.

FIG. 13 is a longitudinal sectional view showing a conventional exterior plate structure.

[Explanation of symbols]

１　　　　Base 2 Exterior board 3 Upper edge molding part 4 Lower edge molding part 5 Stepped section 6 Joint part 6a Gap

Claims (5)

[Claims] Claim 1: An upper edge molded part is formed along the upper edge of the band-shaped exterior plate body and is folded back toward the front side, and a lower edge molded part is formed that is folded back toward the back side along the lower edge of the exterior plate body. , the upper edges of this exterior board are adjacent to each other on the base of the building exterior,
In an architectural exterior structure in which both lower edge molded parts are engaged and joined together for horizontal roofing, a step is formed rising from the surface of the exterior plate along the lower side of the joint between the exterior plates. 2. The architectural exterior structure according to claim 1, wherein the stepped portion is formed within 10 mm from the lower end of the lower edge molded portion at the joint portion. [Claim 3] The raised surface of the stepped portion is 90 degrees with respect to the exterior surface.
3. The architectural exterior structure according to claim 1, wherein the architectural exterior structure is erected at an angle of about plus or minus 15 degrees. 4. The architectural exterior structure according to claim 1, wherein the height of the stepped portion is 3 mm or more from the surface of the exterior plate. 5. The architectural exterior structure according to claim 1, wherein the length of the exterior plate is a fixed length.