JP2003314028A - Exterior wall construction structure and exterior wall construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an exterior wall construction structure, and exterior wall construction method superior in workability, strength, and ventilation performance. <P>SOLUTION: This exterior wall construction structure 1 fastens an exterior wall board 4 via a fastening metal fitting 3 to metallic furring strips 2 fixed to a structural skeleton. The metallic furring strips 2 are an almost rectangular shape in a horizontal cross section, and have a rear plate part 21, a front plate part 22, and a side plate part 23. A locking opening part 24 is arranged in a plurality in the front plate part 22. The fastening metal fitting 3 has a base board part 31, a support part 32, an upper plate locking part 33, a lower plate locking part 34, an upper leg part 35, a lower leg part 36, and an engaging groove 37. The fastening metal fitting 3 engages the lower plate locking part 34 with an upper side part 41 of a lower side exterior wall board 4, and the engaging groove 37 with the front plate part 22, allows the upper leg part 35 to abut to the front plate part 22, supports a lower side part 42 of an upper side exterior wall board 4 by the support part 32, and is locked by the upper plate locking part 33. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outer wall construction structure and an outer wall construction method in which an outer wall plate is fastened to a metal furring strip fixed to a structural frame of a building.

[0002]

2. Description of the Related Art Conventionally, a wooden furring strip or a metal furring strip made of C-shaped steel or a square pipe has been used as a base material for fastening an outer wall plate. Although the above-mentioned wooden furring strip is easy to obtain, there is inevitably a variation in material quality, and due to the difference in water content, it is impossible to avoid a variation in holding force for nails and screws. The metal furring strip can solve the drawbacks of the wooden furring strip.

As an outer wall construction structure using the metal furring strip, there are structures shown in FIGS. 8 and 9. That is, the outer wall construction structure 9 includes the metal furring strip 9 fixed to the structural body 91 of the building.
2 is obtained by directly fixing the outer wall plate 94 with the screw 95 via the waterproof paper 93.

[0004]

However, in the conventional outer wall construction structure 9 as described above, the outer wall plate 94 is directly fixed to the metal furring strip 93 by using the screw 95 as described above. A certain degree of skill is required for the screw fastening work on the edge 93. The quality of this screw fastening greatly affects the construction accuracy of the outer wall construction structure 9.
In addition, there is also a problem in that the work is troublesome due to the screw fastening work. Therefore, in order to reliably and easily construct the outer wall construction structure 9 with a certain construction accuracy, a technique that does not require the screwing work is required.

Therefore, as shown in the second embodiment of Japanese Patent Laid-Open No. 10-2087, there is an outer wall construction structure in which a hook member having an elastic locking piece is attached to a metal furring strip and an outer wall plate is fastened. . However, since the elastic locking piece is locked to the metal furring strip by its elastic force, it may be difficult to sufficiently bear the weight of the outer wall plate.

Further, Japanese Patent Laid-Open Publication Nos. 10-2088 and 9-256591 disclose an outer wall construction structure in which a fastening portion for an outer wall plate is formed on a metal furring strip itself. However, in this case, it is not easy to process the metal furring strip, and it is also difficult to sufficiently secure the strength of the fastening portion.

Further, Japanese Patent Application Laid-Open No. 9-144272 discloses an outer wall construction structure in which a mounting tool is attached to a mounting hole of a metal furring strip and an outer wall plate is fastened. However, the metal furring strip has a substantially C-shaped cross section, and its opening side is fixed by abutting it on the structural frame. Therefore, the contact area between the structural skeleton and the metal furring strip is small, and it is difficult to secure a sufficient fixing force for both. Further, in the outer wall construction structure, since the back side surface of the outer wall plate is in direct contact with the metal furring strip, it is not possible to ensure sufficient ventilation in this contact portion.

The present invention has been made in view of the above conventional problems, and an object thereof is to provide an outer wall construction structure and an outer wall construction method which are easy to construct and have sufficient strength and air permeability.

[0009]

A first invention is an outer wall construction structure in which an outer wall plate is fastened to a plurality of metal furring strips vertically fixed to a structural frame of a building via fastening metal fittings. The metal furring strip has a substantially rectangular horizontal cross section, and has a rear plate portion that abuts the structural frame, a front plate portion that faces the back side surface of the outer wall plate, and the front plate portion and the rear plate portion. And a side plate portion continuously provided between the fastening members, and the front plate portion is provided with a plurality of locking openings for locking the fastening members at predetermined intervals. Is a base plate portion that abuts the back side surface of the outer wall plate, a support portion that is erected forward from the base plate portion, an upper plate locking portion that is bent obliquely upward from the support portion, and an oblique portion from the support portion. A lower plate locking part bent downward, an upper leg part formed above and behind the base plate part, and a lower part of the base plate part Two lower leg portions formed on the rear side and an engaging groove formed on the lower leg portions and opening downward, the fastening metal fitting is configured such that the lower plate is locked to an upper side portion of a lower outer wall plate. The engaging groove is engaged with the front plate portion on the lower side of the locking opening, and the front side surface of the upper leg portion is fixed on the front plate portion above the locking opening portion. The outer wall construction structure is characterized in that the lower side portion of the outer wall plate on the upper side is supported by the support portion and is locked by the upper plate locking portion (claim 1).

Next, the function and effect of the present invention will be described.
In the outer wall construction structure, the outer wall plate is fastened by the fastening fittings that are fastened to the fastening openings of the metal furring strip. Therefore, the outer wall plate can be fastened to the metal furring strip without using fixing means such as screws. Therefore, the above-mentioned outer wall construction structure is easy to construct and the construction accuracy is unlikely to vary.

In the fastening member, the engaging groove is engaged with the front plate portion on the lower side of the locking opening portion, and the front side surface of the upper leg portion is located above the locking opening portion. By abutting the back side of the part, it is locked to the metal furring strip. Therefore, it is possible to reliably prevent the fastening metal fitting from coming off from the metal furring strip due to the load of the outer wall plate applied to the lower front. Thereby, the fastening strength of the outer wall plate can be sufficiently secured, and the outer wall construction structure having excellent strength can be obtained.

The metal furring strip has a substantially rectangular horizontal cross section, and is fixed by abutting the plate portion on the structural frame. Therefore, since the contact area between the metal furring strip and the structural frame is large, the fixing force of both is high. As a result, an outer wall construction structure having sufficient strength can be obtained.

Further, since the fastening metal fitting is formed by forming the upper leg portion and the lower leg portion rearward of the base plate portion, a space between the back side surface of the outer wall plate and the front plate portion of the metal furring strip is formed. A ventilation layer can be secured. Therefore, it is possible to obtain an outer wall construction structure having excellent breathability.

As described above, according to the present invention, it is possible to provide an outer wall construction structure that is easy to construct and has sufficient strength and air permeability.

A second invention is an outer wall construction method for constructing an outer wall construction structure in which an outer wall plate is fastened to a plurality of metal furring strips vertically fixed to a structural frame of a building through fastening metal fittings. The metal furring strip has a substantially rectangular horizontal cross section, and has a rear plate portion that comes into contact with the structural body, a front plate portion that faces the back side surface of the outer wall plate, and the front plate portion and the rear plate portion. A plurality of locking openings for locking the fastening metal fitting are provided at predetermined intervals in the front plate, and The fitting includes a base plate portion that abuts a back side surface of the outer wall plate, a support portion that stands upright from the base plate portion, an upper plate locking portion that is bent obliquely upward from the support portion, and the support portion. A lower plate locking part that is bent obliquely downward from the upper part, an upper leg part formed above and behind the base plate part, and the base plate part The lower side of the outer wall plate has a lower leg portion formed downward and rearward, and an engaging groove formed in the lower leg portion and opening downward, when fastening the outer wall plate to the metal furring strip. Part is locked to the metal fittings or starter metal fittings that are locked in the locking openings of the metal furring strip,
Next, a new fastening metal fitting is locked in the locking opening portion of the metal furring strip formed at a position corresponding to the position of the upper side portion of the outer wall plate, and the lower plate locking portion of the fastening metal fitting is engaged. To the upper side of the outer wall plate, and further to support the lower side of the outer wall plate placed on the upper side to the support part of the fastening metal fitting and to lock by the upper plate locking part. In the outer wall construction method, the outer wall plate is fastened to the metal furring strip by a method (claim 7).

According to the present invention, it is possible to provide an outer wall construction method for constructing an outer wall construction structure which is easy to construct and has sufficient strength and air permeability.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION In the first invention (claim 1), as the outer wall plate, for example, a ceramic outer wall plate can be used. Further, it is preferable that waterproof paper is interposed between the structural body and the metal furring strip. The predetermined interval is, for example, an interval corresponding to the size of the outer wall plate.

Further, it is preferable that the metal furring strip has a screw hole formed in the rear plate portion behind the locking opening (claim 2). In this case, the metal furring strip can be easily screwed and fixed to the structural body from the front.

Further, the vertical length of the locking opening is shorter than the vertical length from the upper end of the engaging groove in the fastening fitting to the upper end of the upper leg, and the upper leg is removed. It is preferable that it is longer than the vertical length of the fastening fitting (claim 3). As a result, it is possible to easily and reliably lock the fastening member by only partially inserting it into the locking opening of the metal furring strip and moving it.

When the vertical length of the locking opening is longer than the vertical length from the upper end of the engaging groove of the fastening fitting to the upper end of the upper leg, the fastening fitting is attached to the locking opening. It may be difficult to lock. vice versa,
If the vertical length of the locking opening is shorter than the vertical length of the fastening fitting excluding the upper leg portion, it is difficult to stably lock the fastening fitting in the locking opening. Becomes

Further, the front plate portion of the metal furring strip is formed with a lower-stage locking opening for locking a starter metal fitting arranged on the lower side of the lowermost outer wall plate. The metal fitting includes a starter engaging groove for engaging with the metal furring strip, a back surface contact portion that contacts the back side surface of the outer wall plate, and a starter that contacts the metal furring strip behind the back surface contact portion. The starter fitting includes a back plate portion, an upright portion standing upright from the back plate portion of the starter, and a bent portion bent obliquely upward from the upright portion. It is preferable that the front plate portion at the lower side of the lower locking opening is engaged, the lower side portion of the outer wall plate is supported by the standing portion, and the bent portion is locked.

In this case, it is possible to obtain an outer wall construction structure that is easy to construct and has sufficient strength and air permeability even at the base. The starter metal fitting may be integrated with a base drainer for discharging the rainwater flowing down along the outer wall plate forward.

Further, a parting edge is provided between the eaves roofing material disposed above the upper edge of the metal furring strip and the outer wall plate disposed below the eaves roofing material. The parting edge includes a parting engaging groove that engages with an upper edge portion of the metal furring strip, a top plate portion that abuts a lower surface of the eaves roofing material, and the outer wall plate in front of the parting engaging groove. And a decorative plate portion that covers the front side surface of the upper end of the outer wall plate, the parting edge having the parting engagement groove at the upper edge of the metal furring strip. It is preferable that the front plate portion of the outer wall plate is brought into contact with the eaves roof member and the front side surface of the upper end portion of the outer wall plate is covered with the decorative plate portion (claim 5). .
In this case, it is possible to obtain an outer wall construction structure that is easy to construct and has sufficient strength and air permeability even in the eaves top.

Further, it is preferable that the parting edge is formed so as to form a vent hole at the upper end of the outer wall plate, which communicates the back surface side and the front surface side of the outer wall board (claim 6). In this case, air permeability in the eaves top can be secured.

Next, in the second aspect of the present invention (claim 7), when the fastening fitting is locked to the metal furring strip, the upper leg of the fastening fitting is moved upward from the locking opening. The lower end of the fastener is raised until the lower end of the fastener is located above the lower side of the locking opening, and then lowered, so that the locking groove of the lower leg is engaged. It is preferable to engage the front plate portion on the lower side of the stop opening (claim 8). In this case, the fastening fitting can be more smoothly locked to the metal furring strip.

[0026]

EXAMPLE An outer wall construction structure according to an example of the present invention will be described with reference to FIGS. As shown in FIG. 1, the outer wall construction structure 1 of this example is constructed by fastening outer wall plates 4 to a plurality of metal furring strips 2 which are vertically fixed to a structural body 11 of a building via fastening metal fittings 3. .

As shown in FIG. 2, the metal furring strip 2 has a substantially rectangular horizontal cross section, and a rear plate portion 21 that abuts the structural frame 11 and a front side surface 46 of the outer wall plate 4 that faces the rear plate portion 21. It has a plate portion 22 and side plate portions 23 that are continuously provided between the front plate portion 22 and the rear plate portion 21 and that face each other. As shown in FIGS. 1 and 2, the front plate portion 22 is provided with a plurality of locking openings 24 for locking the fastening member 3 at predetermined intervals.

As shown in FIGS. 1 and 3, the fastening member 3 has a base plate portion 3 which abuts a back side surface 46 of the outer wall plate 4.
1 and a supporting portion 32 which is provided upright from the base plate portion 31. In addition, the above-mentioned fastening metal 3 is the above-mentioned bearing 3
The upper plate engaging portion 33 is bent obliquely upward from 2 and the lower plate engaging portion 34 is bent obliquely downward from the support portion 32. Further, the fastening member 3 includes an upper leg portion 35 formed above and behind the base plate portion 31, and the base plate portion 3.
1 has a lower leg portion 36 formed on the lower side and the rear side thereof, and an engagement groove 37 formed on the lower leg portion 36 and opening downward.

As shown in FIG. 1, the fastening member 3 has the lower plate engaging portion 34 on the upper side portion 41 of the lower outer wall plate 4.
While engaging the engaging groove 37 with the engaging opening 37.
It engages with the front plate portion 22 on the lower side. Further, the fastening member 3 has the front side surface 351 of the upper leg portion 35.
The rear side surface 22 of the front plate portion 22 above the locking opening 24.
2, the lower side portion 42 of the outer wall plate 4 on the upper side is supported by the support portion 32, and is locked by the upper plate locking portion 33.

The outer wall plate 4 has an upper lower portion 4 on the upper side portion 41.
10 and has a lower solid 420 on the lower side portion 42. As shown in FIG. 1, a caulking material 43 is cast on the front surface of the lower upper part 420. Outer wall plates 4 vertically adjacent to each other
Is the upper solid 410 of the lower outer wall plate 4 and the upper outer wall plate 4
The upper and lower parts 420 of the above are joined by being joined up and down. Further, the lower upper fruit 420 is arranged on the front surface of the upper lower fruit 410 so as to press the caulking material 43.

As shown in FIGS. 1 and 3, a front flat plate portion 334 is formed in front of the upper plate locking portion 33 and the lower plate locking portion 34. The front flat plate portion 334 is in contact with the back side surface of the lower solid 420 of the upper outer wall plate 4.
As the outer wall plate 4, a ceramic outer wall plate is used.

Further, as shown in FIG. 1, the structural body 1 described above is used.
A waterproof paper 12 is interposed between 1 and the metal furring strip 2 described above. In addition, as shown in FIGS.
Is formed between the front holding plate 371 and the rear holding plate 372 formed on the lower leg 36.

Further, as shown in FIG. 2, the locking opening 24 is formed over the entire lateral width of the front plate portion 22 of the metal furring strip 2. Then, the locking opening 24 is
The front plate portion 22 of the metal furring strip 2 made of an aluminum square pipe having a thickness of 1.0 to 1.2 mm is formed by cutting at a predetermined position with a predetermined width. The square pipe forming the metal furring strip 2 may be made of iron, hot-dip zinc-aluminum alloy plated steel plate, or the like.

As shown in FIGS. 1 and 2, the metal furring strip 2 has the rear plate portion 21 behind the locking opening 24.
A screw hole 211 is formed in the. And the screw hole 21
The metal 25 is inserted into the structure body 11 and is screwed into the structure body 11 so that the metal furring strip 2 is attached to the structure body 11
It is fixed to.

Further, as shown in FIG.
The vertical length of the locking opening 24 is larger than the vertical length from the upper end of the engagement groove 37 in the fastening fitting 3 to the upper end of the upper leg portion 35 so that the fixing opening 24 can be fixed to the metal furring strip 2. Is shorter and longer than the vertical length of the fastening fitting 3 excluding the upper leg portion 35.

The fastener 3 is formed, for example, by stainless bending or aluminum extrusion. Also, as shown in FIG. 1, the front side surface 351 of the upper leg portion 35 is the back side surface 2 of the front plate portion 22 of the metal furring strip 2.
It is in contact with 22.

Further, as shown in FIG. 6, the metal furring strip 2 is formed.
The front plate portion 22 is formed with a lower stage locking opening 241 for locking the starter metal fitting 5 arranged on the lower side portion 42 of the outermost wall plate 4 at the lowermost stage. The starter fitting 5 has a starter engaging groove 57 for engaging with the metal furring strip 2,
Back surface contact portion 56 that contacts the back side surface 46 of the outer wall plate 4.
A starter back plate portion 55 that contacts the metal furring strip 2 behind the back surface contact portion 56, and the starter back plate portion 55.
From the standing portion 52, and a bent portion 53 that is bent obliquely upward from the standing portion 52.

In the starter fitting 5, the starter engaging groove 57 is engaged with the front plate portion 22 at the lower side of the lower locking opening 241 so that the lower side portion 42 of the outer wall plate 4 is made.
Is supported by the upright portion 52 and is locked by the bent portion 53. In addition, the starter fitting 5 also has a function as a base drainer for discharging the rainwater flowing down along the outer wall plate 4 forward. That is, the starter fitting 5 includes a draining plate portion 58, which is obliquely inclined downward and below the standing portion 52, and the draining plate portion 5.
8. A drooping plate portion 59 formed vertically downward from the front end of 8
Have and. This makes it possible to improve the drainage of rainwater and the appearance and design of the front surface of the building base.

Further, as shown in FIG.
A parting edge 6 is provided between the eaves roofing material 14 arranged above the upper edge portion 26 and the outer wall plate 4 arranged below the eaves roofing material 14. The parting edge 6 has a parting engagement groove 67 that engages with the upper edge portion 26 of the metal furring strip 2 and the eaves roofing material 1 described above.
4, the top plate portion 61 that contacts the lower surface 141 of the outer wall plate 4, the parting back plate portion 62 that contacts the back side surface 46 of the outer wall plate 4 in front of the parting engagement groove 67, and the upper end portion 49 of the outer wall plate 4. The decorative plate portion 63 covers the side surface 44.

The parting edge 6 has the parting engagement groove 67 in the front plate portion 22 of the upper edge portion 26 of the metal furring strip 2.
And the top plate portion 61 is brought into contact with the eaves top material 14. Further, the front side surface 4 of the upper end portion 49 of the outer wall plate 4 is
4 is covered with the decorative plate portion 63.

The outer wall plate 4 arranged on the eaves top part
Is the outer wall plate 4 used for other parts to adjust the vertical length.
It is obtained by cutting the upper part of the appropriate length. Therefore, the upper end portion 49 of the outer wall plate 4 does not have the upper solid 210. Therefore, as shown in FIG. 7, the upper portion of the outer wall plate 4 arranged in the eaves ceiling portion is fixed to the metal furring strip 2 with screws via the packing material 16.

Further, the parting edge 6 is formed so as to form a vent hole 64 in the upper end portion 49 of the outer wall plate 4 for connecting the rear surface side (the ventilation layer 15 described later) of the outer wall plate 4 and the front surface side. There is. That is, the parting edge 6 has an opening in the parting back plate 62 above the upper end 49 of the outer wall plate 4, and the decorative plate 63 and the front side surface 4 of the outer wall plate 4.
A gap is provided between the No. 4 and.

Next, an outer wall construction method for constructing the outer wall construction structure 1 will be described. First, as shown in FIGS. 4 to 7, the metal furring strip 2 is fixed to the structural body 11 of the building with the waterproof paper 12 with screws. In fastening the outer wall plate 4 to the metal furring strip 2, first, as shown in FIG. 6, the starter fitting 5 is locked in the lower locking opening 241 of the metal furring strip 2. Then, the lower side portion 42 of the outer wall plate 4 is locked to the starter fitting 5.

Next, as shown in FIGS. 1 and 4, a new metal fitting is attached to the locking opening 24 of the metal furring strip 2 formed at a position corresponding to the position of the upper side 41 of the outer wall plate 4. Insert 3. Then, the lower plate engaging portion 34 of the fastening fitting 3 is engaged with the upper side portion 41 of the outer wall plate 4 and the engaging groove 37 is engaged with the front plate portion 22. Further, as shown in FIGS. 4 and 5, the lower side portion 42 of the outer wall plate 4 arranged on the upper side is fixed to the metal furring strip 2 by the above-mentioned fastening fitting 3
It is supported by the support portion 32 and is locked by the upper plate locking portion 33. The outer wall plate 4 is sequentially fastened to the metal furring strip 2 in the same manner.

When the fastening member 3 is locked to the metal furring strip 2, as shown in FIG. 5, the upper leg portion 35 of the fastening member 3 is inserted upward from the locking opening 24. To do. Then, the lower end 373 of the fastening fitting 3 is raised until it is located above the lower side of the locking opening 24. Next, by lowering the fastening member 3 substantially vertically downward, as shown in FIG. 1, the locking groove 37 of the lower leg portion 36 is inserted into the locking opening portion 2.
4 is engaged with the front plate portion 22 on the lower side.

Next, the function and effect of this example will be described. As shown in FIG. 1, in the outer wall construction structure 1, the metal fitting 3 that is locked in the locking opening 24 of the metal furring strip 2 is used.
Then, the outer wall plate 4 is fastened. Therefore, the outer wall plate 4 can be fastened to the metal furring strip 2 without using fixing means such as screws. Therefore, the outer wall construction structure 1 is easy to construct and the construction accuracy is unlikely to vary.

Further, as shown in FIG. 1, the fastening metal fitting 3 engages the engaging groove 37 with the front plate portion 22 on the lower side of the locking opening 24, and the front side surface of the upper leg portion 35. 351 is the front plate 2 above the locking opening 24.
The metal furring strip 2
Is locked to. Therefore, it is possible to reliably prevent the fastening metal fitting 3 from coming off from the metal furring strip 2 due to the load of the outer wall plate 4 applied downward and forward. Thereby, the fastening strength of the outer wall plate 4 can be sufficiently secured, and the outer wall construction structure 1 having excellent strength can be obtained.

The metal furring strip 2 has a substantially rectangular horizontal cross section, and is fixed by abutting the plate portion 21 on the structural frame 11. Therefore, since the contact area between the metal furring strip 2 and the structural body 11 is large, the fixing force between them is high.
Thereby, the outer wall construction structure 1 having a sufficient strength can be obtained.

Further, since the fastening fitting 3 has the upper leg portion 35 and the lower leg portion 36 formed rearward of the base plate portion 31, as shown in FIG. The ventilation layer 15 is provided between the metal plate 46 and the front plate portion 22 of the metal furring strip 2.
Can be secured. Therefore, the outer wall construction structure 1 having excellent breathability can be obtained.

Further, as shown in FIG. 6, the starter fitting 5 includes the starter back plate portion 55 and the back surface contact portion 56.
Since it is formed on the rear side of, the same ventilation layer 15 can be obtained also in the base portion. Further, as shown in FIG. 7, since the parting edge 6 is formed by forming the parting back plate portion 62 in front of the parting engaging groove 67, a similar ventilation layer 15 can be obtained in the eaves part. To be

Further, the metal furring strip 2 has a screw hole 211 formed in the rear plate portion 21 behind the locking opening portion 24. As a result, the metal furring strip 2 can be easily screwed and fixed to the structural body 11. That is,
When fixing the metal furring strip 2 to the structural body 11 with screws,
The screw 25 can be inserted into the screw hole 221 through the locking opening 24, and the screw 25 can be screwed into the structural body 11 through the locking opening 24 using a screwdriver or the like.

Further, as shown in FIG. 1, the vertical length of the locking opening 24 is shorter than the vertical length from the upper end of the engaging groove 37 in the fastening member 3 to the upper end of the upper leg 35. In addition, it is longer than the vertical length of the fastening fitting 3 excluding the upper leg portion 35. As a result, the fastening fitting 3 can be easily and reliably locked in the locking opening 24 of the metal furring strip 2. That is, as shown in FIG. 1, the upper leg portion 35 of the fastening member 3 is surely brought into contact with the back side surface 222 of the front plate portion 22 above the engaging opening portion 24, and is stably retained. You can Further, as shown in FIG. 5, the locking opening 24 of the fastening fitting 3 is
It becomes easy to attach to.

Further, as described above, by inserting the upper leg portion 35 from the locking opening portion 24, moving the fastening member 3 up and down, and engaging the locking groove 37 with the front plate portion 22, The fastening fitting 3 can be more smoothly locked to the metal furring strip 2.

Further, in the base portion, the starter metal fitting 5 is arranged as described above, and the outer wall plate 4 at the bottom is fastened (FIG. 6). As a result, it is possible to obtain the outer wall construction structure 1 that is easy to construct and has sufficient strength and air permeability even in the base portion.

In the eaves ceiling, the parting edge 6 is provided as described above (FIG. 7). As a result, it is possible to obtain the outer wall construction structure 1 that is easy to construct and has sufficient strength and air permeability even in the eaves top. Further, since the parting edge 6 forms the vent hole 64, it is possible to secure the air permeability in the eaves roof part. That is, as shown by the arrow A in FIG. 7, the rising air can be exhausted to the outside through the ventilation port 64 behind the outer wall plate 4.

[0056]

As described above, according to the present invention, it is possible to provide an outer wall construction structure and an outer wall construction method which are easy to construct and have sufficient strength and air permeability.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an outer wall construction structure according to an embodiment.

FIG. 2 is a perspective view and a vertical cross-sectional view of a metal furring strip in the embodiment.

FIG. 3 is a perspective view of a fastening fitting in the embodiment.

FIG. 4 is an explanatory view of an outer wall construction method in the embodiment.

FIG. 5 is an explanatory diagram of an outer wall construction method following FIG. 4.

FIG. 6 is a vertical cross-sectional view of the outer wall construction structure of the base portion in the example.

FIG. 7 is a vertical cross-sectional view of the outer wall construction structure of the eaves portion in the example.

FIG. 8 is a vertical sectional view of an outer wall construction structure in a conventional example.

FIG. 9 is a horizontal sectional view of an outer wall construction structure in a conventional example.

[Explanation of symbols]

1. ． ． Exterior wall construction structure, 11. ． ． Structural frame, 2. ． ． Metal furring, 21. ． ． Back plate, 22. ． ． Front plate, 24. ． ． Locking opening, 3. ． ． Fastening hardware, 31. ． ． Board part, 32. ． ． Support department, 33. ． ． Upper plate locking part, 34. ． ． Lower plate locking part, 35. ． ． Upper leg, 36. ． ． Lower leg, 37. ． ． Engagement groove, 4. ． ． Exterior wallboard, 41. ． ． Upper part, 42. ． ． Lower part,

Claims (8)

[Claims] 1. An outer wall construction structure in which an outer wall plate is fastened to a plurality of metal furring strips vertically fixed to a structural frame of a building through fastening metal fittings, wherein the metal furring strip has a horizontal cross section. A rear plate part having a substantially rectangular shape, which abuts on the structural frame, a front plate part facing the back side surface of the outer wall plate, and a side plate part continuously provided between the front plate part and the rear plate part. The front plate portion is provided with a plurality of locking openings for locking the fastening fittings at predetermined intervals, and the fastening fittings contact the back surface of the outer wall plate. A base plate portion in contact with the base plate, a support part standing upright from the base plate part, an upper plate locking part bent obliquely upward from the support part, and a lower plate locking part bent obliquely downward from the support part. An upper leg portion formed above and behind the substrate portion and a lower leg portion formed below and behind the substrate portion And the engaging groove formed in the lower leg portion and opening downward, the fastening metal fitting engages the lower plate engaging portion with the upper side portion of the lower outer wall plate while engaging with the engaging member. The mating groove is engaged with the front plate portion on the lower side of the locking opening, and further, the front side surface of the upper leg portion is brought into contact with the back side surface of the front plate portion above the locking opening portion, and An outer wall construction structure characterized in that the lower side portion of the outer wall plate is supported by the supporting portion and is locked by the upper plate locking portion. 2. The outer wall construction structure according to claim 1, wherein the metal furring strip has a screw hole formed in the rear plate portion behind the locking opening portion. 3. The vertical length of the locking opening according to claim 1, wherein the vertical length is shorter than the vertical length from the upper end of the engagement groove of the fastening fitting to the upper end of the upper leg, and An outer wall construction structure characterized in that it is longer than the vertical length of the above-mentioned fastening fittings excluding the upper legs. 4. The method according to claim 1, wherein
The front plate portion of the metal furring strip is formed with a lower-stage locking opening for locking a starter metal fitting arranged on the lower side of the lowermost outer wall plate. A starter engaging groove for engaging with the furring strip, a back surface contact portion that contacts the back side surface of the outer wall plate, and a starter back plate portion that contacts the metal furring strip behind the back surface contact portion, The starter has a standing portion that is erected forward from the back plate portion, and a bent portion that is bent obliquely upward from the standing portion. The starter fitting has the starter engaging groove and the lower locking opening. An outer wall construction structure characterized by being engaged with a front plate portion on a lower side of a portion, the lower side portion of the outer wall plate being supported by the standing portion, and being locked by the bent portion. 5. The method according to any one of claims 1 to 4,
A parting edge is arranged between the eaves roofing material arranged above the upper edge of the metal furring strip and an outer wall plate arranged below the eaves roofing material. Is a parting engagement groove that engages with the upper edge of the metal furring strip, a top plate portion that abuts the lower surface of the eaves roofing material, and a back side surface of the outer wall plate in front of the parting engagement groove. A parting back plate part in contact with the outer wall plate, and a decorative plate part covering the front and side surfaces of the upper end part of the outer wall plate, wherein the parting edge has the parting engagement groove in the front plate part at the upper edge part of the metal furring strip. An outer wall construction structure, characterized in that the top plate portion is brought into contact with the eaves roofing member while being engaged, and the front side surface of the upper end portion of the outer wall plate is covered with the decorative plate portion. 6. The parting edge according to claim 5, wherein the parting edge is formed at an upper end portion of the outer wall plate so as to form a vent hole for communicating a back surface side and a front surface side of the outer wall board. Exterior wall construction structure. 7. An outer wall construction method for constructing an outer wall construction structure in which an outer wall plate is fastened to a plurality of metal furring strips vertically fixed to a structural frame of a building via fastening metal fittings. The metal furring strip has a substantially rectangular horizontal cross section, and includes a rear plate portion that abuts the structural frame, a front plate portion that faces the back side surface of the outer wall plate, and between the front plate portion and the rear plate portion. And a plurality of locking openings for locking the fastening metal fittings are provided at predetermined intervals in the front plate portion. A base plate portion that abuts the back side surface of the outer wall plate, a support portion that stands upright from the base plate portion, an upper plate locking portion that bends obliquely upward from the support portion, and a diagonally downward direction from the support portion. A bent lower plate locking portion, an upper leg portion formed above and behind the base plate portion, and below and rearward of the base plate portion. A lower leg portion formed on one side, and an engaging groove formed on the lower leg portion and opening downward, when fastening the outer wall plate to the metal furring strip,
The lower side portion of the outer wall plate is locked to the fastening metal member or the starter metal member that is locked in the locking opening portion of the metal furring strip, and then formed at a position corresponding to the position of the upper side portion of the outer wall plate. A new fastening metal fitting is locked in the locking opening portion of the metal furring strip, and the lower plate locking portion of the fastening metal fitting is locked to the upper side portion of the outer wall plate, and further arranged on the upper side. The lower side portion of the outer wall plate is supported by the support portion of the fastening fitting and is also locked by the upper plate locking portion, and the outer wall plate is sequentially fastened to the metal furring strip in the same manner. The outer wall construction method. 8. The method according to claim 7, wherein when the fastening metal fitting is locked to the metal furring strip, the upper leg portion of the fastening metal fitting is inserted upward from the locking opening. The lower end of the fitting is raised until it is located above the lower side of the locking opening, and then is lowered, so that the locking groove of the lower leg portion moves to the front plate at the lower side of the locking opening. A method for constructing an outer wall, characterized by engaging with a portion.