JP2010229632A - Eaves soffit structure using flashing sheet - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an eaves soffit structure using a flashing sheet preventing rainwater, powdery snow, saline matter, or the like from infiltrating into an attic space of a building in which the attic space is ventilated from a ventilation opening at the edge of the eaves. <P>SOLUTION: In the eaves soffit structure 1 using the flashing sheet, one end of the flashing sheet 2 is fixed to an external wall 8, and the other end is fixed to the rafter 9 of a roof 12. The outside of the building communicates with the attic space through the ventilation opening 14a under the eaves and through spaces between the rafters 9 to ventilate the attic space, and rainwater, powdery snow, saline matter, or the like infiltrating from the ventilation port 14a under the eaves are prevented from infiltrating into the attic space by the flashing sheet 2. Further, the building comprises an outside ventilation external wall structure provided with a plate-like heat insulating material 6 on the back face of an external wall material 4 through a vertical member 5 and having a vertical ventilating space part between the external wall material 4 and the plate-like heat insulating material 6 having an external wall frame 7 on the back face of the plate-like heat insulating material 6. One end of the flashing sheet 2 is preferably held between the plate-like heat insulating material 6 and the external wall frame 7 or between the vertical member 5 and the plate-like heat insulating material 6. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  INDUSTRIAL APPLICABILITY The present invention is a water return sheet that is used in a building that performs ventilation in a shed that takes outside air into the shed from the bottom of the eaves and / or discharges air from the shed to the outside of the building, and prevents water from entering from the ventilation openings under the eaves. It relates to the waterproof structure of the eaves.

  In order to ventilate the shed of the building, ventilating louvers on the wife's surface and under the eaves, ventilating the shed with only the ventilation louvers on the wife's surface, ventilating the attic with only the vents under the eaves, Various hut ventilation has been proposed, such as taking in air from the vents under the eaves and exhausting air from the ventilation gallery on the wife.

JP 2008-156897 A

  However, in the attic ventilation through the ventilation openings under the eaves, the opening shape of the ventilation openings under the eaves is determined in order to ensure sufficient ventilation for the attic ventilation. Furthermore, in coastal areas, salty water splashes and rainwater sometimes infiltrated.

  Rainwater, powdered snow, salt, etc. that entered the back of the shed from the vents under the eaves penetrates into the back of the hut and causes corrosion of parts due to wetting the back of the shed and corrosion of steel due to adhesion of salt, resulting in deterioration of the building. It is the cause.

  In view of the above problems, the present invention is a waterproofing structure for eaves using a water return sheet that prevents intrusion of rainwater, powdered snow, salt, etc. from the ventilation opening of the eaves to the back of the hut of the building. It is an issue to provide.

The above problem is used in buildings where ventilation of the attic is taken from outside the eave to the outside of the building and / or exhausts the air from the attic to the outside of the building, and the water return that prevents water from entering from the ventilation openings under the eave It is the eaves back waterproof structure using the sheet,
One end of the water return sheet is fixed to the outer wall, the other end is fixed to the rafter of the roof,
The outside of the building communicates with the back of the hut through the ventilation opening and rafters under the eaves, and the back of the building is ventilated.
The water that enters from the ventilation port is solved by the eaves-back structure using the water-return sheet that prevents the water from entering the back of the hut by the water-return sheet.

  In the eaves back structure using this water return sheet, one end of the water return sheet is fixed to the outer wall, the other end is fixed to the rafter of the roof, and through the ventilation port and rafter under the eave, Because the outside of the building communicates with the back of the hut and ventilation of the back of the hut is performed, rainwater, powdered snow, salt, etc. that have entered from the ventilation openings under the eaves are blocked from entering the back of the hut by the water return sheet. Such as corrosion of members due to intrusion into the hut and wetting the shed, and corrosion of steel due to adhesion of salt can be solved.

  Moreover, since it can implement | achieve only by attaching a water return sheet | seat in the eaves back, it can implement | achieve advantageously also in cost, without affecting the external appearance of a building.

In the eaves back structure using the water return sheet, the building has a plate-like heat insulating material provided with a plate-like heat insulating material on the back surface of the outer wall material through a vertical member, and has an outer wall frame on the back surface of the plate-like heat insulating material. And an outer ventilation outer wall structure having a vertical ventilation space between the outer wall material and the outer wall material,
One end of the water return sheet may be sandwiched between the plate-like heat insulating material and the outer wall frame or between the vertical member and the plate-like heat insulating material.

  Since one end of the water return sheet is sandwiched between the plate-like heat insulating material and the outer wall frame, in order to fix one end of the water return sheet, without using a special fixing method, The water return sheet can be held. In addition, a plate-shaped heat insulating material is provided on the back surface of the outer wall material via a vertical member, and a vertical ventilation space is provided between the plate-shaped heat insulating material having an outer wall frame on the back surface of the plate-shaped heat insulating material and the outer wall material. When the sheet is interposed between the plate-like heat insulating material and the outer wall frame or between the vertical member and the plate-like heat insulating material, the end portion of the sheet is extended, Since the sheet functions as a water return sheet, it is not necessary to prepare a separate water return sheet, and the water return sheet can be installed.

  In the eaves back structure using the water reversing sheet, the water reversing sheet may be made of a thermally expandable sheet or a non-combustible sheet.

  Because the water return sheet is a thermally expandable sheet or non-combustible sheet, it is possible to prevent the intrusion of fire heat from the eaves to the back of the shed in the event of a fire, not only intrusion of rainwater, powder snow, salt, etc., but also intrusion of heat By preventing this, the fireproof performance of the building can be improved.

  Since the present invention is as described above, it is intended to provide a waterproof structure for the eaves using a water return sheet that prevents rainwater, powder snow, and salt from entering the shed of the building that performs ventilation from the eaves vent. Can do.

Fig. (A) is a cross-sectional side view showing the eaves back structure using the water return sheet according to the embodiment of the present invention, and Fig. (B) is a cross-sectional view taken along the line XX of Fig. (I). It is a cross-sectional side view which shows 2nd Embodiment of this invention. FIGS. 1A and 1B are cross-sectional side views showing another embodiment of the present invention.

  Next, embodiments of the present invention will be described with reference to the drawings.

  In the eaves back waterproof structure 1 using the water return sheet which is an embodiment of the present invention shown in FIG. 14 is an eaves top surface fixing hardware, 15 is a blast ground, 16 is a breez, 17 is Hirokomai, 18 is an eaves drainer, and 19 is a kite.

  The outer wall 8 is provided with a plate-like heat insulating material 6 on the back surface of the outer wall material 4 via a vertical member 5, and has an outer wall frame 7 on the back surface of the plate-like heat insulating material 6, and the outer wall material 4, the plate-like heat insulating material 6, An outer ventilation outer wall structure having a vertical ventilation space therebetween, and a vertical air flow is formed in the ventilation space.

  The roof 12 has a long rafter 9 extending in the direction from the ridge toward the eaves, and is arranged in parallel in a direction perpendicular to the eave direction from the ridge, and a plate-like field board 10 is provided on the rafter 9. The roofing material 11 is provided through a waterproof sheet (not shown). The roof material is made of, for example, slate or tile.

  The eaves top member 13 is fixed to an eaves top member fixing hardware 14 having one end fixed to the windbreak base 15 and the other end fixed to the surface of the outer wall 8. The eaves top member fixing hardware 14 supports the eaves top member 13 and has a ventilation port 14a. In the eaves tip structure, ventilation from the outside is performed by the eaves top surface fixing hardware 14.

  As shown in FIG. 1 (a), the draining sheet 2 has one end sandwiched between the plate-like heat insulating material 6 and the outer wall frame 7 of the outer wall 8, and the other end upward from the upper end of the outer wall 8. It is stretched and folded back toward the eaves end along the lower end surface 9a of the rafter 9 that is arranged in parallel from the ridge toward the eave end direction, and is fixed to the lower end surface 9a of the rafter 9 with the fastening material 3 The As a fastening material, it may be fixed with a screw through a plate, or may be fixed with a U-shaped nail.

  As shown in FIG. 1 (b), the rafters 9 arranged parallel to each other at intervals, the field board 10 and the air gap A surrounded by the water return sheet 2 are used for air flow from the eaves to the back of the shed. In the ventilation method in which the outside air taken from the eaves vents is guided to the back of the cabin and exhausted from the eaves, the air in the back of the cabin is exhausted to the outside through the gap A.

  As mentioned above, the air taken in from the vents at the eaves is led to the back of the hut, but rainwater, powdered snow, salt, etc. that have entered from the vents under the eaves are prevented from entering the back of the hut by the water return sheet 2. Rarely, rainwater, powder snow, salt, etc. are prevented from entering the back of the hut through the rafters 9, the field plate 10, and the gap A surrounded by the water return sheet 2.

The other end portion of the water return sheet 2 is stretched upward from the upper end of the outer wall 8, and along the lower end surface 9a of the rafters 9 arranged in parallel from the ridge toward the eaves direction, Since it is folded back at the eaves side, the length of the gap A surrounded by the rafters 9..., The field plate 10, and the water return sheet 2 that are arranged in parallel at intervals is sufficiently secured. Even if rainwater, powdered snow, salt, etc. that has entered from the ventilation opening under the eaves reaches the gap A without being blocked by the water return sheet 2, the length of the gap A is long. The flow of air that guides rainwater, powdered snow, salt, etc. to the back of the shed is weakened, and it is possible to prevent intruded rainwater, powdered snow, salt, etc. from reaching the back of the shed.

  In addition, since the water return sheet 2 is made of a non-combustible sheet, it is possible to prevent the intrusion of heat from the eaves to the back of the shed in the event of a fire, and not only the intrusion of rainwater, powder snow, salt, etc., but also the intrusion of heat Thus, the fireproof performance of the building can be improved. In particular, it is possible to prevent rainwater, powdered snow, salt, etc. that entered from the ventilation opening under the eaves from entering the back of the hut and improve the fireproof performance of the building by simply attaching a water return sheet made of non-combustible sheets to the back of the eaves. Therefore, it can be realized advantageously in terms of cost without affecting the appearance of the building.

  In the eaves back waterproof structure using the water return sheet of the second embodiment of the present invention shown in FIG. 2, one end of the water return sheet 2 is fixed to the surface of the outer wall material 4 of the outer wall 8. The other end of the water return sheet does not extend upward from the upper end of the outer wall 8, but extends obliquely toward the rafters 9 and is arranged in parallel with a gap from the ridge toward the eaves. Along the lower end surface 9 a of the rafter 9, it is folded back toward the eaves side and fixed to the lower end surface 9 a of the rafter 9. Therefore, the usage-amount of the water return sheet | seat 2 can be reduced and the eaves back waterproof structure using a water return sheet | seat can be implement | achieved.

  Further, since one end of the water return sheet 2 is fixed to the surface of the outer wall material 4 of the outer wall 8, the water return sheet 2 can be fixed in the field after the outer wall 8 is attached. Unlike the case where the outer wall 8 is sandwiched between the plate-like heat insulating material 6 and the outer wall frame 7, it is not necessary to sandwich the draining sheet 2 on the outer wall 8 in advance. In particular, when a building is constituted by an outer wall panel, the water return sheet 2 is not stretched from the end of the outer wall panel, so that the water return sheet 2 may be damaged or caught during transportation of the outer wall panel. Absent.

  Although the embodiment of the present invention has been described above, the present invention is not limited to this, and various modifications can be made without departing from the spirit of the invention. For example, in the above-described embodiment, the case where the eaves are ventilated through the ventilation port provided in the eaves top surface fixing fixture, which is attached to the outer wall and supports the eaves top surface to the outer wall, is shown. The position of the ventilation port is not limited to the above-described embodiment, and may be, for example, a ventilation port provided at the front end portion of the eaves side such as a ventilation gallery provided at the eaves. It is also possible to use a ventilation port provided in the eaves top face material like an eave top face material made of board.

  Further, the method for fixing the water return sheet is not necessarily limited to the above embodiment, and as shown in FIG. 3 (a), one end of the water return sheet 2 is the surface of the outer wall material 4 of the outer wall 8. The other end of the water return sheet is not stretched upward from the upper end of the outer wall 8, but is stretched obliquely toward the rafters 9 and is parallel with a gap from the ridge toward the eaves. You may fix to the lower end surface 9a of the rafter 9 without being along the lower end surface 9a of the rafter 9 arrange | positioned. In this case, the length in the rafter direction of the gap A surrounded by the rafters 9..., The base plate 10, and the water return sheet 2 disposed in parallel with each other is not secured, but the water return sheet 2 is fixed. It is possible to sufficiently prevent rainwater, powdered snow, salt, etc. entering the back of the hut by taking into account the height position.

  Further, as shown in FIG. 3B, it goes without saying that the water return sheet may be fixed from the outer wall 8 side toward the rafter 9 side without being stretched.

  Further, in the above embodiment, the case where one end of the draining sheet 2 is sandwiched between the plate-like heat insulating material 6 of the outer wall 8 and the outer wall frame 7 is shown, but as shown in FIG. One end of the draining sheet may be sandwiched between the vertical member and the plate-like heat insulating material.

    There are no particular restrictions on the material of the water return sheet, for example, polyethylene sheet, polyethylene non-woven fabric, polyethylene composite sheet, plastic sheet, moisture permeable waterproof sheet, etc. Any material that prevents intrusion may be used. Further, if it is also intended to prevent the intrusion of fire heat from the eaves to the back of the shed in the event of a fire, a heat-expandable sheet or a non-combustible sheet may be used.

DESCRIPTION OF SYMBOLS 1 ... Eave back waterproof structure using a water return sheet 2 ... Drainage sheet 3 ... Fastening material 4 ... Outer wall material 5 ... Vertical material 6 ... Plate-shaped heat insulating material 7 ... Outer wall frame 8 ... Outer wall 9 ... Rafter 10 ... Field plate 11 ... Roofing material 12 ... Roof 13 ... Eave ceiling material 14 ... Eating ceiling material 14a ...・ Ventilation opening A ... Gap

Claims (4)

Eaves using water return sheets that are used in buildings that ventilate the back of the shed to take outside air into the back of the shed and / or exhaust the air from the back of the shed to the outside of the building and prevent water from entering through the vents under the eaves It has a waterproof structure on the back,
One end of the water return sheet is fixed to the outer wall, the other end is fixed to the rafter of the roof,
The outside of the building communicates with the back of the hut through the ventilation opening and rafters under the eaves, and the back of the building is ventilated.
Eaves back structure using a water return sheet that prevents water entering from the ventilation port from entering the back of the hut by the water return sheet. The building is provided with a plate-like heat insulating material through a vertical member on the back surface of the outer wall material, and for ventilation in the vertical direction between the plate-shaped heat insulating material having an outer wall frame on the back surface of the plate-shaped heat insulating material and the outer wall material. Consists of an outer ventilation outer wall structure having a space,
The water return sheet according to claim 1, wherein one end of the water return sheet is sandwiched between the plate-like heat insulating material and the outer wall frame or between the vertical member and the plate-like heat insulating material. Eaves back structure.   The eaves back structure using the water return sheet according to claim 1, wherein the water return sheet comprises a thermally expandable sheet.   The eaves back structure using the water return sheet according to claim 1, wherein the water return sheet is made of a non-combustible sheet.

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