JP2012180716A - Building structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a building structure for enabling drainage treatment of rainwater entering from a primary waterproof area of a joint between the outer wall of an existing building and the roof of an extension part, and of rainwater entering from a joint part of an outer wall material of the existing building.SOLUTION: The roof 3 of the extension part 2 is joined to the outer wall 4 of the existing building 1 and a drainage gutter 5 is provided below the joint between the outer wall 4 and the roof 3. Rainwater entering from the primary waterproof area of the joint and rainwater entering from the joint part of the outer wall 4 of the existing building 1, therefore, flow into the drainage gutter 5 and drain from the drainage gutter 5.

Description

  The present invention relates to a structure of a building in which an extension part is provided in an existing building.

The thing of patent document 1 is known as an example of the structure of the building which provides an extension part in the existing building. The structure of the building includes an existing house body part, an extension part built with a roof spaced from the outer wall of the house body part, and the space between the outer wall of the house body part and the roof of the extension part. It consists of a connection hardware that closes after the rain is closed, and the connection hardware is provided with a displacement absorbing portion that absorbs a positional change between the outer wall of the house body and the roof of the extension. is there.
In such a building structure, since the house main body part and the extension part are spaced apart, the position between the outer wall of the house main body part and the roof of the extension part is changed by the rain and closed. It is designed to have a gap absorbing part to absorb.
However, in the structure of the building in which the extension part is connected to the house main body part, the absorption part as described above is unnecessary, so the roof of the extension part is joined to the outer wall of the existing building.

JP 2003-96998 A

By the way, for example, in the case of the outer wall ALC method, the existing outer wall material cannot be easily replaced unlike the general method (siding ventilation method). For this reason, a sealing treatment (primary waterproofing) for waterproofing is performed on the joint portion (joint portion) between the outer wall of the existing building and the extension portion roof, but if this sealing material deteriorates due to, for example, secular change, rainwater May invade.
Further, a waterproof gasket is inserted in the joint portion between the outer wall materials constituting the outer wall, and when this gasket is deteriorated, it is necessary to perform a waterproof treatment for rainwater that has entered from the joint portion.

  The present invention has been made in view of the above circumstances, and in the case where an extension is provided in an existing building, rainwater infiltrated from primary waterproofing at the joint between the outer wall of the existing building and the roof of the extension, and the outer wall material of the existing building It is an object to provide a structure of a building that can perform drainage treatment on rainwater that has entered from a joint.

In order to solve the above problem, the invention according to claim 1 is a structure of a building in which an extension part 2 is provided in an existing building 1 as shown in FIGS.
The roof 3 of the extension part 2 is joined to the outer wall 4 of the existing building 1,
A drainage basin 5 is provided below a joint portion between the outer wall 4 and the roof 3.

  According to the invention described in claim 1, since the drainage basin 5 is provided below the joint portion between the outer wall 4 of the existing building 1 and the roof 3 of the extension portion 2, it has entered from the primary waterproofing at the joint portion. Rainwater or rainwater that has entered from the joints of the outer wall 4 of the existing building 1 can flow into the drainage basin 5 and be drained from the drainage basin 5.

The invention according to claim 2 is the structure of the building according to claim 1,
The drainage basin 5 is provided in the shed S of the joint.

  According to invention of Claim 2, since the drainage basin 5 is provided in the hut back S of the said junction part, the space which provides the drainage basin 5 can be ensured easily.

The invention according to claim 3 is the structure of the building according to claim 2,
The drainage basin 5 is provided below the lower end of the outer wall 4.

  According to the third aspect of the present invention, since the drainage basin 5 is provided below the lower end portion of the outer wall 4, the rainwater flowing down along the outer wall 4 can be reliably received and discharged by the drainage basin 5. .

Invention of Claim 4 is the structure of the building as described in any one of Claims 1-3,
A waterproof sheet 16 is attached to the back surface of the lower end portion of the outer wall 4, and the lower end portion of the waterproof sheet 16 is inserted into the drainage basin 5.

  According to invention of Claim 4, since the lower end part of the waterproof sheet 16 attached to the lower end part back surface of the outer wall 4 is inserted in the drainage basin 5, it is transmitted to the surface and joint part of the outer wall 4. The rainwater flowing down can be reliably guided to the drainage basin 5, and the rainwater flowing down from the outer wall 4 and the rainwater flowing into the drainage basin 5 can be prevented from flowing out to the back side of the outer wall 4.

Invention of Claim 5 is the structure of the building as described in any one of Claims 1-4,
A spare basin 17 is provided in parallel with the drain basin 5 adjacent to the drain basin 5, and the preliminary basin 17 is disposed inside the outer wall 4.

  According to the fifth aspect of the present invention, when rainwater flowing into the drainage basin 5 overflows from the drainage basin 5, this rainwater flows into the spare basin 17, thereby preventing rainwater from flowing into the outer wall 4. it can.

The invention according to claim 6 is the structure of the building according to any one of claims 1 to 5, for example, as shown in FIG.
Outer side walls 5 a of both side walls 5 a, 5 b of the drainage basin 5 extend to the roof 3, and this extended extension portion 5 e is integrally connected to the roof base material 6 of the roof 3. It is characterized by that.

  According to the invention described in claim 6, since the extended portion 5 e of the outer side wall 5 a of the drainage basin 5 is integrally connected to the roof base material 6, Construction can be performed, and the drainage basin 5 can be positioned and fixed easily.

Invention of Claim 7 is the structure of the building as described in any one of Claims 1-6,
The bottom wall 5c of the drainage basin 5 is inclined downward from the longitudinal center of the drainage basin 5 toward the end.

  According to the invention described in claim 7, since the bottom wall 5c of the drainage basin 5 is inclined downward from the longitudinal center portion of the drainage basin 5 toward the end, the rainwater flowing into the drainage basin 5 is It separates from the central part of the drainage basin 5 and flows toward both ends of the drainage basin 5 respectively. Therefore, rainwater can be reliably drained from both ends of the drainage basin 5 to the outside.

The invention according to claim 8 is the structure of the building according to claim 7,
The channel cross-sectional area of the drainage basin 5 is characterized in that the drainage basin 5 increases in size from the longitudinal center to the end.

  According to the invention described in claim 8, the flow passage cross-sectional area of the drainage basin 5 increases from the longitudinal center portion of the drainage basin 5 toward the end portion. Rainwater whose flow rate increases as it goes from the end to the end can be reliably drained.

  According to the present invention, the roof of the extension part is joined to the outer wall of the existing building, and the drainage basin is provided below the joint part between the outer wall and the roof, so that the infiltration from the primary waterproofing at the joint part is entered. The rainwater that has entered the drainage basin and the rainwater that has entered from the joints of the outer wall material of the existing building can flow into the drainage basin and be drained from the drainage basin.

It is sectional drawing which shows the outline of the building provided with the structure of the building which concerns on this invention. It is a perspective view which shows the outline of the building provided with the structure of the building which concerns on this invention. The principal part of the structure of the building which concerns on this invention is shown, and it is AA 'sectional drawing in FIG. FIG. 3 is a cross-sectional view taken along the line BB ′ in FIG. It is sectional drawing which shows the modification of a spare tank with a drainage basin at the same time. It is sectional drawing which shows the example which integrated the drainage basin and the roof base material same as the above.

DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a building structure according to the present invention will be described with reference to the drawings.
FIG. 1 is a sectional view showing an outline of a building having a building structure according to the present invention, and FIG. 2 is a perspective view thereof.
The building includes an existing building 1 and an extension part 2. The existing building 1 is a unit type building constructed by a well-known unit construction method. The unit type building is constructed by assembling a plurality of building units formed in a rectangular parallelepiped shape on the site.
The extension part 2 is connected to the existing building 1 and is extended, and is composed of a plurality of building units. The roof 3 of the extension part 2 is a lower house, and the base end part is joined to the outer wall 4 of the existing building 1. The outer wall 4 is made of ceramic-type lightweight cellular concrete or the like. In FIG. 2, the roof of the existing building is omitted.

As shown in FIG. 3, a drainage basin 5 is provided below the joint between the outer wall 4 and the roof 3. Before the description of the drainage basin 5, the structure of the joint between the outer wall 4 and the roof 3 is provided. Will be described.
That is, the roof 3 has a roof base material 6 formed of plywood or the like, a roofing 7 laid on the roof base material 6, and a roof material 8 laid on the roofing 7. The base end portion of the roofing 7 extends from between the roof base material 6 and the roof material 8 and rises slightly along the outer wall 4.
A pier 9 is installed at the base end of the roofing material 8, and a sheet metal 10 is put on the pier 9. The pier 9 and the sheet metal 10 are long members extending along the ridge direction of the roof 3.

A first fixing portion 10 a that abuts and is fixed to the upper surface of the roof material 8 is formed at one end of the sheet metal 10, and a second that is abutted and fixed to the surface of the outer wall 4 at the other end of the sheet metal 10. A fixed portion 10b is formed. Further, a sealing material 11 is provided over the second fixing portion 10 b and the surface of the outer wall 4, and the sealing material 11 covers a gap between the second fixing portion 10 b and the surface of the outer wall 4. ing.
A draining member 12 is provided above the sheet metal 10. The draining member 12 is a long member extending along the ridge direction of the roof 3, and its lower end is in contact with the upper surface of the sheet metal 10 or is disposed with a slight gap. The upper end portion of the draining member 12 is fixed to the surface of the outer wall 4 at a position above the sheet metal 10, and the sealing material 13 is provided over the upper end portion of the draining member 12 and the surface of the outer wall 4. The sealing material 13 covers a gap between the upper end of the draining member 12 and the surface of the outer wall 4.

The drainage basin 5 is formed in an upward substantially U-shape consisting of left and right side walls 5a, 5b arranged in parallel with each other and a bottom wall 5c connecting the lower ends of the side walls 5a, 5b. 4 and the roof 3 at the junction of the roof 3.
The outer wall 4 on the surface where the extension portion 2 of the existing building 1 is extended is cut at a position below the roof 3 and above the upper surface of the main body of the extension portion 2, and the lower end portion of the outer wall 4 is a fixing member 14. Is fixed to the frame 1a of the existing building 1. The drainage basin 5 is provided below the lower end portion of the outer wall 4 with its bottom wall 5c installed on the upper surface of the main body of the extension portion 2.
The upper end of the left side wall 5 a of the drainage basin 5 is located above the lower end of the outer wall 4, and the upper end of the left side wall 5 a and the base end of the roof base material 6 are connected by a connection plate 15. This connecting plate 15 is a long member extending along the ridge direction of the roof 3, and its upper end is fixed to the base end surface of the roof base material 6, and its lower end is on the left side wall 5 a of the drainage basin 5 on the inner surface. It is fixed. In addition, a gap is provided between the connection plate 15 and the surface of the outer wall 4, and rainwater that has flowed down along the surface of the outer wall 4 flows into the drainage basin 5 through this gap. .

A waterproof sheet 16 is attached to the rear surface of the lower end of the outer wall 4 with its lower end extending downward. This waterproof sheet 16 is a long member extending along the ridge direction of the roof 3, and its lower end is inserted into the drainage basin 5 and is along the inner surface of the right side wall 5 b. The right side wall 5b of the drainage basin 5 is lower than the left side wall 5a, and the upper end of the right side wall 5b is lower than the lower end of the outer wall 4.
Further, a spare rod 17 is provided in parallel with the drainage rod 5 adjacent to the drainage rod 5, and the spare rod 17 is disposed inside the outer wall 4. The left side wall 17a of the spare rod 17 is also used as the right side wall 5b of the drainage rod 5, whereby the drainage rod 5 and the spare rod 17 are integrally formed. Further, the height of the right side wall 17b of the spare rod 17 is equal to the left side wall 17a, and the bottom wall 17c is inclined downward toward the left side wall 17a.

As shown in FIG. 4, the drainage basin 5 extends over the entire width direction of the surface where the extension part 2 of the existing building 1 is extended, and the bottom wall 5 c of the drainage basin 5 has a drainage basin. 5 is inclined downward from the longitudinal central portion toward the end portion. Both ends of the drainage basin 5 are open, and external hoods 18 and 18 are covered on the open ends 5d and 5d.
A sealing material 19 a is provided between the upper surface plate 18 a of the external hood 18 and the outer wall 4 a above the roof 3, and a sealing material 19 b is provided between the lower surface plate 18 b and the outer wall 4 b below the roof 3. Is provided.
In addition, a predetermined interval is provided between the front plate 18c of the external hood 18 and the end of the drainage basin 5, and rainwater (shown by a broken line) flowing through the drainage basin 5 is discharged at this interval, It is supposed to fall into.
Moreover, the flow path cross-sectional area of the drainage basin 5 becomes larger as it goes from the central portion in the longitudinal direction of the drainage basin 5 toward the end. That is, the bottom wall 5c of the drainage basin 5 is inclined downward from the longitudinal center of the drainage basin 5 toward the end thereof, and the flow path is cut off because the left and right side walls 5a and 5b have a constant height. The area increases from the longitudinal center of the drainage basin 5 toward the end.

According to the present embodiment, since the drainage basin 5 is provided below the joint portion between the outer wall 4 of the existing building 1 and the roof 3 of the extension portion 2, primary waterproofing (sealing materials 11, 13 at the joint portion) is provided. ) Or rainwater entering from the joints of the outer wall 4 of the existing building 1 can be introduced into the drainage basin 5 and drained from the drainage basin 5.
Moreover, since the drainage basin 5 is provided in the hut S of the said junction part, the space which provides the drainage basin 5 can be ensured easily.
Furthermore, since the drainage basin 5 is provided below the lower end portion of the outer wall 4, the rainwater flowing down along the outer wall 4 can be reliably received by the drainage basin 5.

Further, since the lower end portion of the waterproof sheet 16 attached to the back surface of the lower end portion of the outer wall 4 is inserted into the drainage basin 5, rainwater that flows down along the surface and joints of the outer wall 4 is reliably guided to the drainage basin 5. In addition, it is possible to prevent rainwater flowing down from the outer wall 4 and rainwater flowing into the drainage basin 5 from flowing out to the back side of the outer wall 4.
Also, when rainwater that has flowed into the drainage basin 5 overflows from the drainage basin 5, this rainwater flows into the spare basin 17, so that rainwater can be prevented from flowing out to the inside of the outer wall 4.
Further, since the bottom wall 5c of the drainage basin 5 is inclined downward from the longitudinal central portion of the drainage basin 5 toward the end, the rainwater flowing into the drainage basin 5 is separated from the central part of the drainage basin 5; It flows toward both ends of the drainage basin 5 respectively. Therefore, rainwater can be reliably drained from both ends of the drainage basin 5 to the outside.
Moreover, since the cross-sectional area of the drainage basin 5 increases from the longitudinal center of the drainage basin 5 toward the end, the flow rate increases from the longitudinal center of the basin 5 toward the end. Can be drained reliably.

FIG. 5 is a cross-sectional view showing a modified example of the spare trough 17 together with the drain trough 5. In the spare rod 17 shown in this figure, the right side wall 17 d is higher than the right side wall 17 b shown in FIG. 3, and the height thereof is equal to the left side wall 5 a of the drainage rod 5.
Also, a double-sided adhesive type waterproof tape 21 is attached to the lower end portion of the waterproof sheet 16 extending downward from the back surface of the lower end portion of the outer wall 4, and this waterproof tape 21 is attached to the right side wall 5 b of the drainage basin 5. Affixed to the inner surface.
The rainwater overflowing from the drainage basin 5 is sucked by the capillary phenomenon of the waterproof tape 21 and flows into the spare basin 17.
In such a spare rod 17, the right side wall 17 d has the same height as the left side wall 5 a of the drainage basin 5, so even if rainwater overflows from the drainage basin 5 to the spare basin 17, It is possible to prevent rainwater from flowing out more reliably.

FIG. 6 is a cross-sectional view showing an example in which the drainage basin 5 and the roof base material 6 are integrated.
The left side wall 5 a of the drainage basin 5 extends to the roof 3, and the extended portion 5 e that extends is integrally connected to the roof base material 6. The distal end of the extending portion 5e is brought into contact with the base end surface of the roof base material 6, and is bent at the upper end of the base end surface so as to be arranged along the upper surface of the roof base material 6, and fixed to the upper surface. Yes.
Further, the right side wall 17e of the spare rod 17 is higher than the right side wall 17d shown in FIG. Further, the right side wall 17e is higher than the upper surface of the roof base material 6, and is higher than the upper surface of the roof material (not shown), that is, the upper surface of the roof 3.
In this example, since the extension part 5e of the left side wall 5a outside the drainage basin 5 is integrally connected to the roof base material 6, the drainage basin 5 can be installed simultaneously with the construction of the roof base material 6. At the same time, the drainage basin 5 can be easily positioned and fixed.
In addition, since the right side wall 17e of the spare rod 17 is higher than the upper surface of the roof 3, except in an emergency where the roof 3 is buried in water even if rainwater overflows from the drainage rod 5 to the spare rod 17. , It will not be higher than the top surface of the roof 3. Therefore, the outflow of rain water to the inside of the outer wall 4 can be prevented more reliably.

DESCRIPTION OF SYMBOLS 1 Existing building 2 Extension part 3 Roof 4 Outer wall 5 Drainage basin 5a, 5b Side wall 5c Bottom wall 5e Extension part 6 Roof base material 16 Waterproof sheet 17 Preparatory fence S Shack back

Claims (8)

In the structure of a building that has an extension part in an existing building,
The roof of the extension part is joined to the outer wall of the existing building,
A structure of a building, wherein a drainage basin is provided below a joint portion between the outer wall and the roof. In the structure of the building of Claim 1,
A structure of a building, wherein the drainage basin is provided on the back of the joint. In the structure of the building of Claim 2,
A structure of a building, wherein the drainage basin is provided below a lower end portion of the outer wall. In the structure of the building as described in any one of Claims 1-3,
A waterproof structure is attached to the rear surface of the lower end of the outer wall, and the lower end of the waterproof sheet is inserted into the drainage basin. In the structure of the building as described in any one of Claims 1-4,
A structure of a building characterized in that a preliminary dredger is provided in parallel to the drain dredger adjacent to the drain dredger, and the spare dredge is disposed inside the outer wall. In the structure of the building as described in any one of Claims 1-5,
The structure of the building characterized in that an outer side wall of both side walls of the drainage basin extends to the roof, and the extended portion is integrally connected to a roof base material of the roof. In the structure of the building as described in any one of Claims 1-6,
The bottom wall of the drainage basin is inclined downward from the longitudinal center of the drainage basin toward the end. In the structure of the building of Claim 7,
The structure of a building characterized in that the flow passage cross-sectional area of the drainage basin increases from the longitudinal center to the end of the drainage basin.

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