JPH04222749A - Construction for ridge for double-roofing roof - Google Patents

Abstract

PURPOSE:To enhance weather-proof property of a ridge section on a double roof with a drain space formed between an upper layer roof section and a lower layer roof section. CONSTITUTION:At the ridge side section of a lower roofing roof-sheathing member 7 for composing a lower layer roof section 1, a rise section 7C is formed, and the ridge section of the lower layer roof is provided with a ridge cover 26 to cover an eaves side from the rise section 7c. Rainwater passed an upper layer roof section 2 under bad conditions is led to the upper surface of the lower roofing roof-sheathing member 7 via the ridge cover 26, and is discharged in the eaves direction via a drain space 3. The rainwater is prevented from being turned around in the ridge direction by wind pressure to blow up from the eaves direction through the rise section 7c of the roof sheathing member 7.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a double roof structure in which a drainage space is formed between an upper roof and a lower roof.

0002

[Prior Art] The designs and materials of roofing materials have diversified in recent years. For example, tiles and natural slate, which were previously only used for decorative purposes such as building parapets, are now being used on the roofs of steel-framed buildings. It tends to be used.

[0003] However, roofing materials such as tiles and natural slate have a problem in that it is difficult to provide sufficient rain protection under conditions where they are exposed to strong winds at high places such as the tops of buildings. On the other hand, in order to ensure sufficient rain protection performance even when using such roofing materials, it is possible to adopt a double-thick roof structure as proposed by the applicant. . This is because the roof consists of an upper roof on the front side and a lower roof on the back side, and a space for drainage is formed between the upper and lower roofs, and if rainwater etc. enters through the upper roof. This is made to flow down toward the eaves along the upper surface of the under-thatched roof sheet material that makes up the lower roof. (Related publicly known materials include, for example, JP-A-60
See Publication No.-215963. )

0004

[Problems to be Solved by the Invention] Generally speaking, when installing a roof ridge, a ridge base is formed using a wooden or metal frame from the ridge core, and a ridge cover called ``ridge wrapping'' is used as the final layer of roof board material on this base. The structure is such that it is attached to cover the rear end, but this had the following construction and structural problems. It was difficult to reliably prevent water leakage into the interior of a house under such adverse conditions.

[0005] In other words, most roof ridge covers are processed and installed on buildings other than ordinary houses after confirming the on-site dimensions after the final stage of roofing board construction. Unlike general roof work, the work requires skill, so the ability to shut off rain tends to vary depending on the skill of the worker. Specifically, the area where the rear end of the last row of roofing sheets meets the ridge cover is generally built upright, but if this area is exposed to strong winds and rain, the wind pressure can cause rainwater to flow inside the ridge. If there is poor construction in this area, water will definitely leak. Alternatively, even if a ridge cover is formed by processing roof board materials, and the structure is made with a seam joint at the ridge core, water may leak from the ridge if there is a construction defect in the seam joint. . Furthermore, the longitudinal joints of the ridge cover are usually overlapped, but if there is a construction defect in these joints, water can leak.

The object of the present invention is to solve these conventional problems and provide a double-thick roof structure with excellent rain-shedding performance.

[0007]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a double roof structure in which a drainage space is formed between the upper roof part on the surface side and the lower roof part on the inside side. The ridge-side ends of the under-thatched roof sheets facing each other at the ridge core are raised upward to form an upright surface along the ridge direction. Further, a ridge cover that covers the ridge-side end of the under-thatched roof board material is provided such that the eave-side end of the cover extends further toward the eaves than the upright surface.

[0008]

[Operation] Based on the above configuration, the ridge side ends of the mutually opposing underlayment roofing sheets are covered with the ridge cover, so
Even if rainwater infiltrates due to a defect in the ridge of the upper roof, the rainwater will not pass through the lower roof, and will be guided toward the eaves along the top surface of the under-thatched roof board by the ridge cover. be done.

[0009] Furthermore, even if water on the under-thatched roof sheets is blown up toward the ridge due to wind pressure, etc.,
The raised part formed at the ridge side end of the roof board material prevents water from entering inward of the ridge cover, and a space corresponding to the height of the raised part is secured on the lower surface of the ridge cover. It also does not cause water to be sucked in due to capillary action. Therefore, the double roof structure exhibits even better weather resistance.

0010

Embodiments Hereinafter, embodiments of the present invention will be explained based on the drawings. Figure 1 shows details of the ridge part of a double roof, in which 1 is the lower roof, 2 is the upper roof, and 3 is the drainage space formed between them.

[0011] The lower roof part 1 is constructed on a base part 4 made of C-shaped steel purlins arranged so as to form a roof surface having a predetermined slope in the direction of both eaves with the ridge center as the center. ing. Structurally, it consists of an underlaying roof board material 7 that is laid directly or indirectly through an interior material 5 such as a heat insulating material and an asphalt layer 6 on the base section. As mentioned above, the base part 4 of this embodiment is shown as a purlin material made of C-shaped steel, but is not limited to this, and includes, for example, a wooden purlin assembly, an ALC panel, a concrete frame, etc. .

[0012] The under-thatching roof board material 7 is made of a thin metal plate material such as a galvanized steel plate, and as shown in FIG. 2 or FIG.
b are formed alternately at predetermined intervals, which is a so-called square wave shape. At the ridge side end part, one edge of the bottom surface part 7b is raised up so that the boundary part with the protrusion part 7a is folded inward, and a height corresponding to the protrusion part 7a is raised along the ridge direction. A standing portion 7c is formed.

As shown in FIG. 1, this roof board material 7 has an interior material 5 with a width extending to both eaves so that the upright portions 7c face each other at a predetermined interval across the ridge core on both the left and right roof surfaces. Thatched on top. In addition, as shown in FIG.
b are connected as necessary so that they partially polymerize with each other.

A fixing fitting 8 is fastened to the upper part of the base part 4 via a fitting fixing bolt 9 so as to be located between the interior materials 5 adjacent in the ridge direction, and the upper end of this bolt 9 is It penetrates the protruding strip 7a of the under-thatching roof board material 7 laid on the interior material 5 and projects upward. A nut 10 is screwed onto the protruding portion of the bolt 9, and a rafter fixing fitting 11 is fastened together between the protruding portion 7a and the protruding portion 7a.

A metal rafter 12 is fixed to the rafter fixing fittings 11 in such a manner that it overlaps the protrusion 7a of the under-thatched roof board material 7, and the upper roof part 2 is constructed on top of this rafter 12. The upper roof part 2 is made up of a plurality of upper roof board members 13 horizontally thatched from the eaves side to the ridge side, a backup material 14 arranged on the back side thereof, and the like.

Each roof board material 13 is fixed on the rafter 12 together with a backup material 14 via a hanging metal fitting 15, and at this time, the ridge side end is connected to the eave side end of another roof board material 13 adjacent to the ridge side. engaged and interconnected. As shown in FIG. 1, the rafter 12 located closest to the ridge is positioned and fixed via the hanging metal fittings 15 fixed on the rafter 12.

On the other hand, a ridge fitting 16 made of a metal plate is attached to the ridge core so as to span the left and right roof surfaces. This ridge fitting 16 is constructed as a long member extending almost the entire length in the ridge direction of the roof, and extends from both ends of the top part 16a, whose central part is bent in accordance with the slope of the roof, to the side part 1.
6b hangs down approximately vertically, its lower end is curved outward and upward to form a flange portion 16c, and the end of the flange portion 16c is further bent outward to form a support portion 16d of the backup material 14. . The fixation is performed by fastening both flanges 16c to the upper surfaces of the rafters 12 facing each other on both the left and right roof sides via screws 17.

A final stage backup material 14 is attached between the supporting part 16d of the ridge fitting 16 and the stepped part 15a of the suspender fitting 15 in such a manner that it is placed on top of these parts, and this backup material The final roofing board material 18 is attached to cover the roof 14. This final stage of roof board material 18 is formed by folding the eave side end downward and inward to insert the eave side engaging part 18a into the engaging part 15b on the upper part of the suspender fitting 15, and at the same time It is fixed by fastening the upwardly formed mounting surface portion 18b to the ridge fitting side surface portion 16b via screws 19.

Further, a ridgepole 20 formed as a long material by extrusion of aluminum is provided at the center of the top part 16a of the ridge fitting. In this metal purlin 20, a support surface portion 20b is raised from the center of a flange portion 20a that is fastened to the ridge fitting 16 via screws 21, and a support surface portion 20c is formed from the top of the flange portion 20b in accordance with the slope of the roof surface. has been done. The inside of the holding surface portion 20c is a holding portion 20d of the ridge cover 22, which will be described next.

The upper surface of the ridge fitting 16 is covered by a ridge cover 22 located between the ridgepole 20 and the final roofing board 18.
covered by. This ridge cover 22 is made of a metal thin plate material similar to the roof board material, and the ridge side end portion thereof is folded upward to form a ridge side fixing portion 22a, which is attached to the ridge pole holding portion 20d.
At the same time, screws 23 are inserted into the eave side fixing part 22b formed by bending the eave side end part downward, and the fixing face part 18c formed by folding the upper end of the mounting surface part 18b of the roof board material 18 outward. By tightening the ridge fitting 1 through
6.

[0021] In this way, the ridge cover 2 is installed on the left and right sides.
2 is attached, a ridge cap 24 made of a thin metal plate and having a hat-shaped cross section is attached to cover the ridgepole 20. The ridge cap 24 is configured such that the lower end of the side surface portion 24b hanging downward from both ends of the top surface portion 24a comes into contact with the upper surface of the ridge cover 22 to prevent water from entering the holding portion 20d.

A major feature of the present invention is that a lower ridge cover 26 is provided on the lower layer side to cover the ridge core of the lower roof portion 1, assuming such a double roof structure. The ridge cover 26 is made of a long thin metal plate that matches the dimensions in the ridge direction, and has a shape in which the center portion is bent to match the slope of the left and right roof surfaces. Further, the width is set so that the end portion on the eave side is located closer to the eave than the upright portion 7c of the under-thatched roof board 7. In this case, the ridge cover 26 has a screw 27 near its eave side end.
It is fastened to the upper surface of the rafter 12 via.

Based on this configuration, the ridge structure of the above embodiment provides the following functions and effects. That is, in this embodiment, the ridge of the upper roof part 2 is strongly constructed using the ridge fittings 16 and the upper ridge cover 22, so that under normally expected conditions, wind and rain will not damage the upper ridge. Although there is no chance of rainwater infiltrating the inside through the parts, there is a possibility that some parts of the ridge cover 22, ridge fittings 16, etc. may be destroyed due to unforeseen circumstances, or rainwater may infiltrate inside due to poor construction. However, this rainwater is reliably discharged to the outside through the drainage space 3 formed on the upper surface of the lower roof part 1, and does not infiltrate indoors.

Specifically, if rainwater enters from the ridge part of the upper roof part 2, this rainwater is guided toward both eaves sides through the lower ridge cover 26, and the rainwater enters the eave side end of the ridge cover 26. It drips onto the upper surface of the under-thatched roof board material 7. This rainwater further flows toward the eaves along the bottom surface 7b of the roof board material 7, and is finally discharged to the outside from the eave side end of the roof. In addition, even if strong wind and rain acts from the eaves side to the ridge side and rainwater in the drainage space 3 blows up toward the ridge, the raised portion 7c formed at the ridge side end of the under-thatched roof board material 7 This prevents this rainwater from leaking indoors. Furthermore, in this case, since a space equal to the height of the protrusion 7a of the under-thatched roof board 7 is formed on the lower surface of the ridge cover 26, rainwater will not be sucked in due to capillary action. Therefore, even in the unlikely event of an emergency, it will exhibit the excellent weather resistance that befits a double-roofed roof.

Next, another embodiment of the present invention is shown in FIG. 5 and below. FIG. 5 shows an example in which the upper roof part 2 is made of slate roofing material 30. The slate roofing material 30 is the underlayment roofing board material 7
The roof is raised from the eave side to the ridge side on the upper surface, and a ridge metal fitting 16 and an upper ridge cover 22 are attached to the ridge between the final tiers of both roof surfaces.

Further, the lower ridge cover 26 has a folded part 26a formed at both ends thereof, and the upper surface of the under-thatching roof board 7 (the protruding part in FIG. 7a). In this case too,
It is the same as in the first embodiment that the folded portion 26a of the ridge cover 26 is positioned closer to the eaves than the upright portion 7c of the under-thatched roof board 7.

FIGS. 8 and 9 are longitudinal cross-sectional views of the roof structure shown in FIG. 5, showing details of the connecting portions by the rafters 12 and the connecting portions between the roof panels 7, respectively. In the first embodiment shown in FIG. 1, the rafters 12 are placed on the protrusions 7a of the under-thatching roof board material 7, but in this embodiment, as shown in FIG. It is provided so as to be located between adjacent roof panels 7. The rafter 12 is fitted onto a substantially U-shaped holding member 31 disposed on the upper surface of a main building material or an interior material (not shown) and is fixed with a fixing member 32 such as a screw or nail. As for the shape, a concave groove part 12a is formed by raising the midway portions of both sides, and by inserting the end hanging surface 7d of the roof board material 7 into this concave groove part 12a, the structure is such that they are connected to each other. In this manner, in a state in which the rafter 12 is connected to the roof board material 7, the upper surface of the rafter 12 forms the same surface as the upper surface of the roof board material protrusion portion 7a. With this structure, even if rainwater floods the connection between the rafters 12 and the roof board 7, this water will be captured in the rafter grooves 12a and flow down toward the eaves, preventing it from entering the room. Water leakage is reliably prevented.

On the other hand, the connection structure between the roof panels 7 is shown in FIG.
As shown in FIG.
It has a structure in which the bottom surface portion 7b is partially polymerized. In addition, as the under-thatching roof board material 7, a material having a curved wavy cross-sectional shape as shown in FIG. 10 can also be used.

Next, the ridge structure shown in FIG. 6 will be explained.
This has back-up materials 33 and 34 placed on the ridge side of the final tier upper roof board material 13 and on the upper surface of the lower ridge cover 26, respectively, and is configured to be divided into left and right parts so as to cover these backup materials 33 and 34. It is covered with an upper ridge cover 35 made of sheet metal. Each ridge cover 35 has its eaves-side engaging end 35a engaged with and fixed to the ridge-side engaging portion 13a of the final roof plate material 13. Further, the ridge side end portions are joined by bending the joining surface portions 35b, which are formed to stand up at the ridge core portion, with the left and right portions butted against each other. The structure of the lower ridge cover 26 is the same as that in FIG. 5, but according to this embodiment, a backup material 34 is provided on the upper surface, so that the load-bearing strength when strong wind pressure etc. acts is improved. do.

Furthermore, the one shown in FIG. 7 is the upper building cover 2.
The structure of 2 is almost the same as that shown in FIGS. 1 to 5, but differs in that a side door 36 having an L-shaped cross section is sandwiched inside the folded portion 26a of the lower ridge cover 26. This door 36 forms a blocking surface along the ridge direction on the upper surface of the under-thatched roof board material 7 (bottom part 7b), and this blocking surface prevents rainwater from flowing toward the ridge when wind pressure is applied from the eaves side. This prevents the air from blowing up, further improving the weather resistance of the ridge.

By the way, although each of the above-mentioned embodiments is an example of a roof ridge structure, the present invention is not limited to this, and can of course be applied to a roof ridge structure. Figure 1
1 shows the structure of the descending ridge part of the double roof shown in Figure 1.As shown in the figure, even in the descending ridge, a gap is created at the boundary between the adjacent lower roof parts 1, so this gap is By providing the lower ridge cover 26 to cover the lower ridge cover 26, weather resistance can be greatly improved. Note that since the constituent members of the roof are the same as those in FIG. 1, corresponding parts are designated with the same reference numerals.

[0032]

Effects of the Invention According to the present invention, in a double roof structure in which a drainage space is formed between an upper roof portion and a lower roof portion, the ridges of the under-thatched roofing sheets facing each other at the ridge core of the roof are fixed. A ridge cover whose side edges are raised upward to form an upright surface along the ridge direction and which covers the ridge side end of the under-roofing roofing board material is provided so that the eave side end of the cover is closer to the eaves than the upright surface. By covering the gap between the underlying roofing sheets facing each other across the ridge core, the path for rainwater to enter the gap is blocked. Even if rainwater blows into the interior, there is poor construction of the ridge of the upper roof, or the ridge of the rising roof is partially damaged during bad weather such as a typhoon, rainwater will not leak into the room. There is no possibility of water infiltration leading to leakage.

[0033] Furthermore, since a space is secured on the lower surface of the ridge cover of the lower roof portion, which is approximately equal in height to the height of the upright portion of the under-thatched roof board, problems such as rainwater being sucked in due to capillary action do not occur. Therefore, even in a structure in which a roofing material such as tiles or natural slate is applied to the upper roof part, a ridge structure and a descending ridge structure with extremely good weather resistance can be obtained.

Further, in the present invention, when a side door is provided at the tip of the ridge cover or descending ridge cover, the side door prevents rainwater from flowing from the edge of the ridge cover toward the ridge side end of the bottom-blown roof board. Since infiltration is more reliably prevented, even better weather resistance is exhibited.

[Brief explanation of the drawing]

FIG. 1 is a front sectional view showing a first embodiment of a double roof ridge structure according to the present invention.

FIG. 2 is a vertical sectional view of the main part of the embodiment.

FIG. 3 is a perspective view of essential parts showing an example of an under-thatching roof sheet material applicable to the embodiment.

FIG. 4 is a perspective view of a main part showing another example of the roof sheet material.

FIG. 5 is a front sectional view showing a second embodiment of the double roof ridge structure according to the present invention.

FIG. 6 is a front sectional view showing the third embodiment.

FIG. 7 is a front sectional view showing the fourth embodiment.

FIG. 8 is a vertical cross-sectional view showing an example of the side cross-sectional structure of each of the embodiments.

FIG. 9 is a vertical cross-sectional view showing another example of the side cross-sectional structure.

FIG. 10 is a longitudinal cross-sectional view showing another example of the side cross-sectional structure.

FIG. 11 is a front sectional view showing an embodiment in which the ridge structure of a double roof according to the present invention is applied to a descending ridge portion.

[Explanation of symbols]

1...Lower roof part, 2...Upper roof part, 3...Drainage space, 4...
Base part, 5... Inner layer material, 6... Asphalt layer, 7... Under-thatching roof board material, 7a... Protrusion part, 7c... Standing part, 8... Fixing metal fittings, 9... Metal fitting fixing bolts, 10... Nuts, 11... Rafter fixing Metal fittings, 12... Rafters, 13... Roofing board materials, 14... Back-up materials, 15... Hanging metal fittings, 16... Ridge fittings, 17... Screws, 1
8... Roof board material, 20... Purlin, 22... Upper layer ridge cover, 24... Ridge cap, 26... Lower layer ridge cover.

Claims (2)

[Claims] Claim 1: In a double-roofed roof structure in which a drainage space is formed between an upper roof part on the surface side and a lower roof part on the inner side, ridges of under-thatched roofing sheets facing each other at the ridge core of the roof. A ridge cover that raises the side edges upward to form an upright surface along the ridge direction and covers the ridge side edges of the under-thatched roofing board material.
A ridge structure of a double-thatched roof, characterized in that the eave-side end of the cover extends further toward the eaves than the upright surface. 2. The ridge cover of the lower roof portion is provided at both ends with side doors that form a blocking surface along the ridge direction on the upper surface of the under-thatched roof board material. A ridge structure with a double roof.