JP2011246886A - Drainage structure of balcony - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drainage structure of a balcony in which a floor surface capable of flowing down the surface water toward a drain part only by a drainage slope without through a gutter can be constructed easily in a balcony.SOLUTION: A drainage structure 10 that is designed to form a drainage slope that directly goes down to a drain part 16 on a floor 15 of a balcony 14 comprises: sub-floor face material 19 that is horizontally installed and supported by lower structural material 18; a lower part slope joist 21 and a distributed joist 22 installed on the top face of the sub-floor face material 19; and slope forming face material 23 that is laid on supported by the joists 21, 22 to provide a drainage slope. The lower part slope joist 21 is installed so that the top surface makes a downward slope toward the drain part 16. The slope joist 22 is installed so that the top surface makes a downward slope toward the lower part slope joist 21. To absorb a distortion occurring in the slope forming face material 23 a space portion 24 is retained between a lower side end portion 22a of the slope joist 22 and the lower part slope joist 21.

Description

  The present invention relates to a drainage structure for a balcony, and more particularly, to a drainage structure for a balcony for forming a drainage gradient toward a drain portion on a floor surface of the balcony.

  For example, balconies provided in buildings such as residential buildings are provided as protruding parts surrounded by handrails without a roof as an extension of the living room, and are exposed to wind and rain. It is desirable to provide a drainage gradient on the floor so that surface water such as rainwater can be discharged smoothly. For example, by providing a side groove at the edge portion along the outer peripheral rising part of the balcony by a sleeve wall or the like constituting a handrail, and forming a drainage gradient toward the side groove with a gentle inclination of, for example, about 1 to 2 degrees on the floor surface. It is possible to drain the surface water of the balconies by flowing the surface water down into the side groove and further down toward the drainage drain through the drainage gradient of the side groove.

  For example, in the case of a building such as a wooden house building, it is difficult to form a drainage gradient by mortar finishing etc. on the balcony floor, so it was installed horizontally by supporting it on the lower structural material such as floor beams. On the upper surface of the floor base material, lay an intermediate laying material, such as a heat insulating material that has been processed by changing the thickness so as to have a gradient, and cover this intermediate laying material with a fireproof sound insulation material and a floor finish material. The floor structure of the balcony which formed the drainage gradient by attaching is also developed (for example, refer patent document 1).

JP 2004-92188 A

  On the other hand, when a side groove is provided along the inside of the outer peripheral rising part of the balcony, the side groove has a considerable width, so that the side groove that is one step lower than the balcony floor surface impairs the beauty and the side groove. The area of the floor surface of the balcony is reduced by the amount provided, making it difficult to effectively use the entire floor surface. For this reason, in recent years, there has been a development of a technique for causing surface water to flow directly toward a drain portion provided at a corner portion of a balcony, for example, only by a drainage gradient on the floor surface without using a side groove. It is desired.

  For example, when surface water flows down toward the drain part provided at the corner of the balcony only by the drainage gradient of the floor surface, in addition to the drainage gradient toward the inside of the rising edge of the balcony, the direction perpendicular thereto Since the drainage gradient toward the drain part is also required, the technique of Patent Document 1 can process and form the intermediate laying material by changing the thickness so as to provide such a three-dimensional drainage gradient. Have difficulty.

  It is an object of the present invention to provide a balcony drainage structure in which a floor surface capable of allowing surface water to flow down toward a drain portion only by a drainage gradient without a side groove can be easily provided in a balcony. Objective.

  The present invention provides a drainage structure for a balcony for forming a drainage gradient toward a drain portion on the floor surface of the balcony, and is a floor base material that is supported horizontally by a lower structural member and installed under the floor. An underwater slope joist attached to the inside of the balcony along the outer peripheral rising portion of the balcony, and installed in a direction perpendicular or substantially perpendicular to the underwater joist joist A plurality of slope joists that are attached at predetermined intervals, and the slope forming surfaces that are laid over the floor base material so as to have a drainage slope supported by these underwater joists and gradient joists. The underwater gradient joist is attached so that the upper surface thereof becomes a downward gradient toward the drain portion, and the upper surface of the gradient joist is directed toward the underwater joist joist Take down slope Provided is a balcony drainage structure in which a strain absorbing spacing portion of the slope-forming face material is held between the descending end of the slope joist and the slope joist for underwater This achieves the above object.

  In the balcony drainage structure of the present invention, it is preferable that a plurality of the below-mentioned gradient joists are attached along the inner side of the outer peripheral rising portion of the balcony while holding the ventilation gap.

  Further, in the balcony drainage structure according to the present invention, the hollow portion between the floor base material and the slope forming surface material is arranged on the outer periphery via the ventilation gap between the underwater slope joists. It is preferable to communicate with a ventilation layer provided at the rising portion.

  Further, in the balcony drainage structure of the present invention, it is preferable that the rising side end portion of the slope joist is attached in a state where an air gap interval portion is held between the rising side end portion of the balcony and the living room side.

  According to the drainage structure for a balcony of the present invention, a floor surface capable of allowing surface water to flow toward the drain portion only by a drainage gradient without using a side groove can be easily provided in the balcony.

It is a fragmentary sectional view of the residential building where the balcony provided with the drainage structure which concerns on preferable one Embodiment of this invention was provided. It is principal part sectional drawing explaining the structure of the drainage structure of the balcony which concerns on preferable one Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic plan view illustrating a configuration of a drainage structure for a balcony according to a preferred embodiment of the present invention before a slope forming face material is installed. It is principal part schematic sectional drawing of the state before installing the slope forming face material along AA of FIG. It is a perspective view of the underwater gradient joist. It is a perspective view of a slope joist. (A)-(c) is a schematic plan view of the state before installing the surface material for gradient formation which illustrates the other form of the balcony in which the drainage structure of this invention is provided. (A)-(f) is a perspective view which illustrates other forms of a slope joist.

  As shown in FIG. 1, a drainage structure 10 for a balcony according to a preferred embodiment of the present invention is an outdoor side as an extended portion of a living room portion 12 on the second floor in a wooden two-story residential building 11 as a building, for example. When the balcony 14 is formed above the living room portion 13 on the first floor, the surface water existing on the floor surface 15 of the balcony 14 is caused only by the drainage gradient of the floor surface 15 without passing through the side grooves. It is provided to allow the water to flow down toward the drain portion 16 (see FIG. 3) so that the water can be drained. In this embodiment, the balcony 14 is covered with the roof 17 only at a part above the roof 14 so that rainwater can easily enter, and it is necessary to drain water for cleaning. The balcony drainage structure 10 of the present embodiment is adopted as a structure for allowing surface water to flow down directly toward the drain portion 16 and to be removed.

  And the drainage structure 10 of the balcony of this embodiment is a drainage structure for forming the drainage gradient which goes to the drain part 16 in the floor surface 15 of the balcony 14, Comprising: As shown also in FIGS. As the lower structural member 18, for example, a floor base material 19 that is supported horizontally by floor beams, floor joists, etc., and a floor base material 19 that is installed on the upper surface of the floor base material 19. The underwater slope joist 21 attached to the inside of the sleeve rail wall 20 for handrails 20 and the underwater joist joist 21 is extended in a direction perpendicular or substantially perpendicular to the underwater joist 21 and spaced at a predetermined interval. And a plurality of slope joists 22 to be mounted, and a slope forming face material 23 supported by these underwater slope joists 21 and the slope joists 22 so as to have a drainage slope so as to cover the floor base material 19. Including It is. The underwater joist 21 is attached so that the upper surface of the joist 21 has a downward slope toward the drain portion 16 provided at the corner portion of the balcony 14, and the upper surface of the joist 22 is used for underwater. It is attached so as to become a downward slope toward the slope joist 21, and between the descending end 22 a of the slope joist 22 and the underwater joist joist 21, for strain absorption of the slope forming face material 23. The space | interval part 24 is hold | maintained.

  In the present embodiment, for example, the balcony 14 is partitioned by the outer wall 12a of the living room 12 and the sleeve wall 20 having a U-shaped planar shape in the second floor portion of the residential building 11, for example, the protruding width B (protruding width) is provided so as to have a horizontally-long rectangular planar shape having a size of about 900 to 1800 mm and a length L of about 1800 to 3600 mm (see FIG. 3).

  Further, in this embodiment, the floor base material 19 constituting the drainage structure 10 is made of, for example, a structural plywood having a thickness of about 24 mm and is supported by the lower structural material 18 such as a floor beam or a floor joist. By laying on the upper surface, the floor portion of the living room portion 12 on the second floor is continuously installed horizontally from the outer peripheral portion of the balcony 14 to the region below the sleeve wall 20. On the upper surface of the portion of the floor base material 19 that is disposed on the balcony 14, a slope joist 21 and a slope joist 22 are installed as a base for laying the slope forming face material 23. .

  As shown in FIG. 5, the underwater joist 21 is a wooden rod-shaped member preferably having a rectangular cross-sectional shape made of LVL (single plate laminated material), and has a length of about 1820 to 2730 mm, for example. is doing. The rectangular cross section of the underwater joist 21 has a width b of, for example, about 30 to 50 mm, and its height h is about 20 to 30 mm, for example, about 20 to 30 mm at the down end 21a of the down slope. For example, the portion 21b has a height of about 40 to 50 mm, and the height difference between them is, for example, about 10 to 20 mm. Thus, when the underwater joist 21 is attached to the upper surface of the floor base material 19 via an adhesive, a fixing screw, a fixing nail or the like, the attachment surface of the gradient forming surface material 23 by the upper surface is provided. However, the slope is a downward slope inclined at a gentle angle from the upstream side end 21b toward the downward side end 21a.

  In this embodiment, the underwater joist 21 holds the ventilation gap 25 along the inside of the rising base end of the sleeve wall 20 at the long side of the balcony 14 as shown in FIG. In this state, a plurality (two) are attached. These two underwater joists 21 hold the upstream end 21b at the center in the long side while holding the ventilation gap 25 having a width of, for example, about 100 mm at the center in the long side of the balcony 14. It arrange | positions in a part and it is each installed so that the upper surface may become a downward slope toward the drain part 16 provided in the both-ends corner part of the sleeve wall 20 of the balcony 14. As shown in FIG. Also, the two underwater gradient joists 21 are provided with a ventilation gap 27 between the descending end 21a and a drain joist 26 installed in an L shape outside the drain portion 16. In the held state, each is installed along the inside of the sleeve wall 20 of the balcony 14.

  As shown in FIGS. 2, 3, 4, and 6, the slope joist 22 is a wooden rod-like member preferably having a rectangular cross-sectional shape made of LVL (single plate laminated material), for example, with a protruding width of 910 mm. The floor surface 15 of the balcony 14 has a length of, for example, about 450 mm as the length of about 65% of the length of the short side. The rectangular cross section of the slope joist 22 has a width b of, for example, about 30 to 50 mm, and its height h is, for example, about 43 mm at the descending end 22a of the descending slope, and 47, for example, at the ascending end 22b of the descending slope. The height difference between them is, for example, about 4.5 mm. Accordingly, when the slope joist 22 is attached to the upper surface of the floor base material 19 via an adhesive, a fixing screw, a fixing nail or the like, the attachment surface of the slope forming surface material 23 by the upper surface is increased. It becomes a downward slope that is inclined at a gentle angle from the side end portion 22b toward the downward side end portion 22a. The length of the slope joist 22 and the slope of the upper surface can be appropriately designed in accordance with the protruding width of the balcony 14 and the like within a range in which the strain of the slope forming face material 23 can be effectively absorbed.

  In the present embodiment, the slope joists 22 are arranged, for example, in parallel or substantially in parallel with the short sides of the floor 15 of the balcony 14 and along the sleeve walls 20 on the long sides of the balcony 14. A plurality of lines are installed in the long side direction of the balcony 14 at a predetermined interval of, for example, about 227 to 455 mm, extending in a direction perpendicular or substantially perpendicular to the underwater joist 21 (see FIG. 3). . Each slope joist 22 is attached with the up-side end portion 22b disposed close to the outer wall 12b of the living room 12 on the second floor, so that the upper surface thereof becomes a downward slope toward the submersible slope joist 21. Installed. Between the downstream end 22a of each installed slope joist 22 and the underwater joist 21, for example, a strain absorbing space 24 of the slope forming face material 23 having an interval of about 220 to 250 mm is held. Will be. In addition, the installation interval of these slope joists 22 and the interval of the strain absorbing interval portions 24 are also appropriately designed in accordance with the protruding width of the balcony 14 and the like as long as the strain of the slope forming face member 23 can be effectively absorbed. can do.

  Further, in the present embodiment, each slope joist 22 is provided between the rising side end portion 22b and the rising base end portion of the outer wall 12a of the living room portion 12, for example, a ventilation interval portion having a width of about 12 to 30 mm. In the state where 28 is held, it is attached to the upper surface of the floor base material 19.

  Furthermore, in this embodiment, the drain part joist 26 surrounding the drain part 16 is preferably a wooden rod-like member having a rectangular cross section made of LVL (single plate laminate), and the descending end part of the gradient joist 22 It is installed at a height of, for example, about 20 to 30 mm, which is lower than the height of 22a, similar to the height of the descending end 21a of the underwater gradient joist 21.

  In this embodiment, as shown in FIG. 2, for example, the thickness of the slope forming face material 23 supported by the underwater slope joists 21 and the slope joists 22 and laid above the floor base face material 19 is as shown in FIG. It consists of a structural plywood of about 9-12 mm. The slope forming face material 23 is formed by continuously arranging a plurality of structural plywood processed and formed into a predetermined shape, and as a whole, is surrounded by the rising base end of the sleeve wall 20 and the rising base end of the outer wall 12a. It is installed so as to have a substantially horizontally-long rectangular plane shape in which a portion corresponding to the drain portion 16 is cut out, which is substantially the same as the shape of the floor surface 15 of the balcony 14. The slope-forming face material 23 is adhesive, fixed with the structural plywood preferably in close contact with the top face of the slope joist 22 attached to the upper surface of the floor base face material 19 or the submersible slope joist 21. By fixing to these joists 22 and 23 via screws, fixing nails, etc., it is easily installed as a component of the floor surface 15 of the balcony 14 with a desired drainage gradient facing the drain portion 16 on the upper surface. Will be.

  Here, the structural plywood constituting the gradient forming face material 23 has a physical property capable of being deformed to some extent by being warped or bent while firmly holding the flat plate shape. Therefore, the upper surface of the underwater gradient joist 21 having a downward gradient toward the drain portion 16 and the upper surface of the gradient joist 22 having a downward gradient in a direction perpendicular or substantially perpendicular thereto are disposed on the same surface. Even if not, the error due to the fact that they are not arranged on the same surface is caused by the fact that the slope forming face material 23 is removed from the strain absorption spacing portion 24 between the underwater gradient joists 21 and the gradient joists 22. It is possible to absorb by deforming. Therefore, the slope-forming face material 23 is fixed to the upper surface of the slope joists 22 and the underwater slope joists 21 while fixing the structural plywood along these upper faces, so that the slope joists 22 and the underwater are fixed. Using the upper surface of the gradient joist 21 as a guide, it is attached in a state following these gradients. Thus, the upper surface of the installed slope forming face material 23 is a downward slope of the upper surface of the underwater gradient joist 21 toward the drain portion 16 and an underwater joist joist 21 in a direction perpendicular or substantially perpendicular thereto. A three-dimensional drainage gradient toward the drain portion 16, which is combined with a downward gradient on the upper surface of the gradient joist 22 facing, is provided.

  And in this embodiment, as shown in FIG. 3, the floor finishing material 29 and the floor surface protection material 30 such as a slag gypsum board are attached, covering the upper surface of the laid gradient forming face material 23, The floor 15 of the balcony 14 is formed.

  Moreover, in this embodiment, the ventilation layer 31 by the ventilation | gas_flowing ventilation panel is provided in the inside along the inner wall face of the sleeve wall (periphery rising part) 20. As shown in FIG. Further, the hollow portion between the floor base material 19 and the gradient forming surface material 23 is a ventilation gap 25 between the two underwater gradient joists 21 or the underwater gradient joists 21 and the drain joists. The ventilation layer 31 communicates with the ventilation layer 31 via a ventilation gap portion 27 between the sleeve wall 20 and a ventilation notch 32 provided at the lower end portion of the inner wall surface of the sleeve wall 20.

  In addition, as a ventilation panel which forms the ventilation layer 31, it arrange | positions in parallel with the some front side strip | belt-shaped narrow-width board arrange | positioned in parallel at intervals, for example as described in Unexamined-Japanese-Patent No. 2000-160732, for example. In addition, a wall base panel formed by joining and integrating a plurality of back side belt-like narrow plates in a state of crossing each other can be preferably used. For example, when it is not necessary to attach a waterproof sheet or the like to the inner wall surface of the sleeve wall 20, the ventilation notch 32 is penetrated to the hollow interior of the sleeve wall 20, and the hollow interior of the sleeve wall 20 is passed through the ventilation layer 31. As above, it is possible to communicate with the hollow portion between the floor base material 19 and the gradient forming surface material 23.

  And according to the drainage structure 10 of the balcony of the present embodiment having the above-described configuration, the floor surface 15 capable of flowing the surface water toward the drain portion 16 only by the drainage gradient without using the side groove, It can be easily provided in the balcony-14.

  That is, according to the present embodiment, the drainage structure 10 includes a floor base material 19 installed horizontally, a gradient joist 21 and a gradient joist 22 installed on the upper surface thereof, and an underwater gradient. A slope forming face material 23 supported by the joists 21 and the slope joists 22 and laid over the floor base material 19, and the descending end 22a of the slope joists 22 and the underwater joists 21 Since the strain absorbing spacing portion 24 of the gradient forming face member 23 is held between the slope forming face member 23 and the slope forming face member 23 while being subjected to strain deformation by the strain absorbing spacing portion 24, By attaching along the upper surface of the gradient joist 22, the downward gradient of the upper surface of the gradient joist 21 for water heading toward the drain portion 16 and the downward gradient of the upper surface of the gradient joist 22 in a direction perpendicular or substantially perpendicular to this are combined. Without passing through the gutter A three-dimensional drainage slope towards directly down portion 16, it is possible to easily form on the floor 15 of the balcony 14 without requiring much labor.

  Further, according to the present embodiment, the hollow portion between the floor base material 19 and the gradient forming surface material 23 is a ventilation layer provided in the outer peripheral rising portion 20 via the ventilation gap portions 25 and 27. 31, the hollow portion between the floor base material 19 and the gradient forming surface material 23 is efficiently ventilated, and the constituent members of the drainage structure 10 are likely to deteriorate due to the occurrence of condensation. Can be effectively avoided. Further, since the rising side end portion 22b of the slope joist 22 holds the ventilation interval portion 28 between the rising base end portion of the outer wall 12a which is the living room side rising portion of the balcony 14, the floor base material Ventilation of the hollow part between 19 and the slope forming face material 23 can be further efficiently achieved.

  The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, the drainage structure of the present invention is not limited to a horizontally-long rectangular flat balcony, but, for example, as shown in FIGS. 7 (a)), L-shaped flat-shaped balconies (FIG. 7 (b)), and L-shaped flat-shaped balconies with different depths (FIG. 7 (c)). Can also be adopted. Further, for example, as shown in FIGS. 8A to 8E, a slope joist or a submersible joist joist is used by appropriately selecting from a plurality of types having different heights and lengths, or these are appropriately combined, Gradient joists and underwater joists can also be installed on the top surface of the floor covering for the balcony. You may make it adjust the height of the slope joist and the underwater joist joist as shown in FIG.8 (f). Further, the hollow portion between the floor base material and the gradient forming surface material can be ventilated by communicating with a ventilation layer provided at the standing side rising portion.

DESCRIPTION OF SYMBOLS 10 Balcony drainage structure 12 Second-floor living room 12a Second-floor living room 14 Balcony 15 Balcony floor 16 Drain 18 Lower structural material 19 Floor base material 20 Rise of outer periphery (sleeve wall)
21 Gradient joist 21a Downstream end 21b of submersible gradient joist Upstream end 22 of submersible joist jolt 22a jolt 22a Downward end 22b of joisted jolt Upstream end 23 of gradient joist Surface material 24 Strain-absorbing spacing 25, 27, 28 Spacing spacing 26 Drain joist 31 Breathing layer 32 Notch for ventilation

Claims (4)

A drainage structure of a balcony for forming a drainage gradient toward the drain portion on the floor surface of the balcony,
Floor base material installed horizontally supported by the lower structural material, and water slope installed on the inner surface of the balcony along the rising edge of the balcony installed on the upper surface of the floor base material A plurality of slope joists that extend in a direction perpendicular to or substantially perpendicular to the submersible slope joists and are attached at predetermined intervals, and are supported by these submersible joist joists and gradient joists, and are drained. Including a slope-forming face material laid over the floor base face material so as to have a slope,
The underwater gradient joist is attached so that the upper surface thereof becomes a downward gradient toward the drain portion, and the upper surface of the gradient joist has a downward gradient toward the underwater gradient joist. And a drainage structure for a balcony in which a strain absorbing spacing portion of the slope forming face material is held between a descending end of the slope joist and the underwater joist joist. 2. The balcony drainage structure according to claim 1, wherein a plurality of the underwater joists are attached along the inside of the outer peripheral rising portion of the balcony while holding a ventilation interval portion. A hollow portion between the floor base material and the gradient forming face material communicates with a ventilation layer provided at the outer peripheral rising portion via a ventilation gap portion between the underwater gradient joists. The drainage structure for a balcony according to claim 2. The drainage structure for a balcony according to any one of claims 1 to 3, wherein the rising end portion of the slope joist is attached in a state in which a ventilation space is held between the rising end portion of the balcony and the living room side of the balcony.

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