JP2016169489A - Eaves structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an eaves structure that prevents dew condensation water formed indoor from flowing over an exterior wall.SOLUTION: An eaves structure of the present invention has a gap between a roof material and a wall material, with a waterproof sheet bonded from an inner wall of the wall material and over a top surface of the wall material, and then over an undersurface of the roof material in an upward inclination. The eaves structure also has an eaves edge member fixed on the wall material, the eaves edge member having an eaves edge top surface at a height between the top surface of the wall material and the undersurface of the roof material. The waterproof sheet is an elastic member having an edge on one side folded back in a loop-form, and the waterproof sheet is fixed on the eaves edge top surface after closing the gap between the undersurface of the roof material and the top surface of the eaves edge with the folded loop of the waterproof sheet. An edge part on the other side of the waterproof sheet is fixed on the inner wall of the wall material.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an eaves structure of a plant facility, particularly a waste incineration facility.

  An eaves-parting face door and a drainer are attached to the joint of the roof and wall material at the eaves of a general building to prevent rainwater from entering. This is to prevent rainwater from entering from the joint between the roofing material and the wall material while improving the appearance. Furthermore, rainwater is prevented from dripping along the outer wall of the wall material. For example, in Patent Document 1, a decorative member is installed along the eaves under the eaves attached to the eaves. And the draining part is provided in the upper end part of the said decorative member protruded outside rather than the lower end part.

  Furthermore, Patent Document 2 discloses an eaves structure for suppressing the occurrence of rain on the outer surface of the side wall without impairing the appearance. In the eaves structure of the same document, a draining part is provided on the back side of the eaves bowl, and an overhanging part protruding away from the outer surface of the side wall is provided at the lower end of the draining part.

Japanese Utility Model Publication No. 7-6355 JP 2014-133888 A

  Conventionally, it has been regarded as a problem that rainwater travels along the outer wall, and Patent Documents 1 and 2 disclose an eaves structure that solves this problem. On the other hand, in addition to the above-mentioned problems, facilities such as a garbage incineration plant that cause condensation are contaminated with the outer wall due to condensation in the building.

  In the buildings of the garbage incineration plant, the vicinity of the ceiling of the building tends to be moist and dust is also flying due to the effects of moisture contained in the garbage, heat from the reaction of the garbage, and dust generated from the garbage. Moist air containing these dusts condenses at the joint between the roof and wall of the building. Condensed water generated in this way causes a problem that the outer wall is soiled by being transmitted from the joint portion to the outer wall of the wall material.

  Then, an object of this invention is to provide the eaves structure which prevents the dew condensation water which arose in the building is transmitted to an outer wall.

  An object of the present invention is an eaves structure having a gap between a roof material and a wall material, covering the ceiling of the wall material from the inner wall of the wall material, and going up to the lower surface of the roof material with an upward slope. This is achieved by an eaves structure characterized by a stretch.

  The eaves structure of the present invention has an effect that the condensed water generated on the lower surface of the roof material flows along the upper surface of the waterproof sheet and flows inside the wall material, so that the condensed water does not contaminate the outer wall. In addition, since the waterproof sheet prevents wet air containing dust from leaking to the outside from the contact between the roof material and the wall material, there is an effect of preventing contamination with dew condensation water that has traveled through the outer wall.

(A) is YY sectional drawing of 4th embodiment of the eaves structure of this invention, (B) is YY sectional drawing which shows the effect of the embodiment, (C) is (iii) of sectional drawing (A). ) Part enlarged view. (A) is YY sectional drawing of 2nd embodiment of the eaves structure of this invention, (B) is YY sectional drawing which shows the effect of the embodiment, (C) is (i) of sectional drawing (A). ) Part enlarged view. (A) is YY sectional drawing of 3rd embodiment of the eaves structure of this invention, (B) is YY sectional drawing which shows the effect of the embodiment, (C) is (ii) of sectional drawing (A). ) Part enlarged view. (A) is a perspective view of a rubber asphalt sheet with a loop according to the third embodiment of the eaves structure of the present invention, (B) is a perspective view showing another example of a loop made of a rubber asphalt sheet, (C) is It is a YY sectional view showing an example using a rubber asphalt sheet of (B). (A) is a figure which shows the example of the building which carried out the eaves structure of this invention, (B) is YY sectional drawing of 1st embodiment of the eaves structure of this invention, (C) shows the effect of the embodiment. It is YY sectional drawing. These are YY sectional drawing of 5th embodiment of the eaves structure of this invention. It is YY sectional drawing which shows the principle in which the eaves structure of this invention prevents the leakage of internal dew condensation water. (A) is a diagram showing an example of a conventional building where dew condensation is generated along the outer wall, (B) is a YY sectional view showing the flow of dust and wet air in the conventional building, and (C) is a dew condensation water in the conventional building. It is YY sectional drawing which shows a mode that is transmitted through an outer wall.

  The flow of dust and moist air in a general building, particularly a garbage incineration building, is shown, and then the appearance of dew condensation water traveling along the outdoor wall of the building is shown. FIG. 8A is a diagram illustrating an example of a conventional building in which condensed water 31 is generated along the outer wall. In the following description, the cross-sectional view of the eaves structure is a cross-sectional view taken along the YY cross section.

  FIG. 8B is a cross-sectional view of a general conventional building eaves structure. That is, it is a cross-sectional view of the joint portion between the roofing material 1 and the wall material 2, and the eaves end member 23 is fixed to the wall material 2 with a fastening screw 233. As the wall material 2, for example, lightweight lightweight concrete (Autoclaved Lightweight aerated Concrete) subjected to high-temperature and high-pressure steam curing is used. The gap between the roof material 1 and the eaves member 23 is partitioned by the eaves edge parting door 12 inside and outside the building. The eaves facing part door 12 is fixed to the roofing material 1, and is fastened to the eaves member 23 by a fastening screw 122. The general eaves have the above-described structure, and the rain hitting the roofing material 1 falls to the ground through a gutter (not shown) and falls as rainwater from the folded-back portion 121 of the eaves-parting face door 12, and the outer wall 21 Is not transmitted.

  On the other hand, in the building, dust and moist air generated from garbage and other combustible waste are supplied with heat. The dust and moist air rise, for example, along the arrow α. In the vicinity of the roof material 1, it moves in the horizontal direction along the roof material lower surface 11, for example, along the arrow β 1. In the vicinity of the eaves member 23 or the top of the wall material 22, for example, a downward flow occurs along the arrow β2. Further, the flow is as shown by an arrow γ along the inner wall 24, for example.

  In the convection of dust and wet air described above, dew condensation occurs in the vicinity of the wall material top end 22 as the temperature of the air decreases. Condensed water is dirty water that contains dust. FIG. 8C is a cross-sectional view showing a state in which the dew condensation water is transmitted through the outer wall, and the dew condensation water 3 is generated at the wall material top end 22. Furthermore, this becomes the dew condensation water 31 transmitted through the outer wall 21 and the dew condensation water 32 transmitted through the inner wall 24. In the case of a garbage incineration building, the dew condensation water 32 along the inner wall is not a problem. On the other hand, the dew condensation water 31 along the outer wall is problematic because it impairs the appearance of the building. Thus, although a general eaves structure has a draining function with respect to external rainwater, it has no effect on external leakage of internal condensed water and propagation along the outer wall. The eaves structure of the present invention is an eaves structure that prevents such leakage of internal dew condensation water and propagation along the outer wall.

  FIG. 7 shows the principle of preventing the generation of condensed water 31 along the outer wall. The source of the dew condensation water 31 along the outer wall is dust and wet air flowing into the space between the wall material top 22 and the roof material lower surface 11. This condenses due to a decrease in temperature and becomes condensed water 3, accumulates in the wall eaves engagement part 232, and flows as condensed water 31 along the outer wall. In order to cut off these sources, it is necessary to prevent dust and wet air from entering the top of the wall material top 22 as much as possible. In particular, it is necessary to prevent dust and wet air from entering the substantially triangular region having the convection blocking member 4 (broken line) as the base and the triangular prism region having the eaves tip engagement portion 232 as the apex, or three-dimensionally.

  FIG. 5A is a diagram illustrating an example of a building having an eaves structure according to the present invention. Hereinafter, the cross-sectional view of the eaves structure of the present invention is shown as a cross-sectional view taken along the YY cross section. FIG. 5B is a sectional view showing the first embodiment of the eaves structure of the present invention. A waterproof sheet 41 is stretched from the wall material inner wall 24 to the roof material lower surface 11 so as to cover the wall material top end 22 and to the roof material lower surface 11. When viewed from the opposite side, the waterproof sheet 41 has a downward slope from the roof material lower surface 11 to the wall material inner wall 24. Due to this gradient, even when condensation occurs on the surface of the waterproof sheet 41, all flows to the inner wall 24 side, and there is an effect that the condensed water 31 does not occur along the outer wall. The example of FIG. 5 is an example of a folded plate roof, but the present invention is not limited to the folded plate roof.

  FIG. 5C is a cross-sectional view showing the effect of the embodiment, and shows the condensed water 3 accumulated on the upper surface of the waterproof sheet 41. The condensed water 3 is generated on the waterproof sheet 41, and is also condensed on the lower surface 11 of the roof member and dropped onto the waterproof sheet 41. In the first embodiment of the eaves structure of the present invention, there is a waterproof sheet 41 that is inclined downward toward the inner wall 24, so that the condensed water does not collect in the wall eaves engagement portion 232, and the effect of preventing the dewed water 31 traveling along the outer wall is prevented. There is. The waterproof sheet may be rubber asphalt, that is, a rubber-like elastic mat impregnated with asphalt.

  FIG. 2A is a cross-sectional view showing a second embodiment of the eaves structure of the present invention. The method of tensioning the waterproof sheet 41 is the same as in the first embodiment. FIG. 4C is an enlarged view of part (i). In addition, the backing heat insulating material 5 is attached to the roof material lower surface 11. In the case of a folded plate roof, it may be attached to the back side of the folded plate. As the backing heat insulating material 5, glass wool can be used, for example. The backing heat insulating material 5 has an effect of hindering the flow of dust and wet air (arrow β1) in the vicinity of the roof material lower surface 11. By this effect, dust and wet air on the wall material top end 22 are reduced.

  The backing insulation 5 has a large surface area. Moist air containing dust condenses on the surface of the backing heat insulating material 5 and falls directly below. Therefore, the backing heat insulating material 5 is attached to the roof material lower surface 11 only closer to the building side than the center of the top of the wall material. For example, the backing heat insulating material 5 is not pasted on the portion of the eaves vicinity region 6 (broken line). By setting it as the above structure, the quantity of the dust in the eaves tip vicinity area | region 6 which is upper vicinity of the wall eaves engagement part 232, and moist air can be reduced.

  FIG. 2B is a cross-sectional view showing the effect of the embodiment. A broken line XX indicates a center line of the wall material 2. For the above reason, since the amount of dust and wet air in the eaves vicinity region 6 is reduced, the condensed water 3 generated in the waterproof sheet 41 is also reduced, and there is an effect of reducing the condensed water 32 along the inner wall. Of course, the condensed water 31 does not occur along the outer wall. The effect of the backing heat insulating material 5 is not that the inner wall 24 is transmitted, but there is an effect that the amount of condensed water directly falling into the building is increased.

  FIG. 3A is a cross-sectional view showing a third embodiment of the eaves structure of the present invention. FIG. 3C is an enlarged view of part (ii). Here, it is assumed that the eaves top end 231 has a height located between the roof material lower surface 11 and the wall material top end 22. The waterproof sheet 41 is based on the premise that an elastic material such as a rubber asphalt sheet is used. Since the rubber asphalt sheet 42 has elasticity, when the end portion is folded back, it becomes a thick loop shape. This is the bent portion 421. The gap between the roof material lower surface 11 and the eaves top end 231 is filled using the thickness of the bent portion 421. After filling the gap, the rubber asphalt sheet 42 is fixed to the eaves top end 231, and the other end of the rubber asphalt sheet 42 is fixed to the inner wall 24 of the wall material 2.

  In this way, the joint is bonded by using rubber asphalt (material is rubber) as the waterproof sheet, so it can be easily bonded in the width direction, and condensed water falls to the top of the wall material. There is an effect to prevent.

  FIG. 3B is a cross-sectional view showing the effect of the embodiment, and shows the dew condensation water 3 collected on the upper surface of the rubber asphalt sheet 42. Condensation water 3 may be generated on the rubber asphalt sheet 42 or may be condensed on the lower surface 11 of the roof member and dropped onto the rubber asphalt sheet 42. In the third embodiment of the eaves structure according to the present invention, since there is the rubber asphalt sheet 42, the dew condensation water does not collect in the wall eaves engagement part 232, and there is an effect of preventing the dew condensation water 31 along the outer wall. Further, due to the elasticity of the bent portion 421 of the rubber asphalt sheet 42, the inside and outside of the roof material lower surface 11 and the eaves top end 231 are blocked, and there is an effect of preventing leakage of dust and wet air inside the building. . Further, since the rubber asphalt sheet 42 is inclined downward from the eaves top end 231 toward the wall material inner wall 24, all the condensed water 3 flows to the inner wall 24 side and becomes condensed water 32 along the inner wall. There is an effect that the dew condensation water 31 is not generated.

  FIG. 4A is a perspective view of a rubber asphalt sheet 42 according to the third embodiment of the eaves structure of the present invention. In FIG. 4A, the bent portion 421 is obtained by looping the end portion of the rubber asphalt sheet 42 upward. The gap between the roof material lower surface 11 and the eaves top end 231 is filled using the elasticity generated in the loop. The inner wall covering portion 422 covers the inner wall 24. Further, the bent portion 421 and the inner wall covering portion 422 are inclined substantially downward.

  FIG. 4B is a diagram of another bent portion 421 of the rubber asphalt sheet 42 in which the end portion of the rubber asphalt sheet 42 is looped by turning downward. Even if it is bent in this way, it is possible to create an elastic thick region at the end, and as in the previous example, the eaves top end 231, the wall material top end 22 and the upper part of the inner wall 24 can be covered. it can. FIG. 4C is a cross-sectional view of the eaves top end 231 covered with a rubber asphalt sheet 42 looped downward.

  FIG. 1A is a cross-sectional view showing a fourth embodiment of the eaves structure of the present invention. The method of tensioning the rubber asphalt sheet 42 is the same as in the third embodiment. In addition, the backing heat insulating material 5 is attached to the roof material lower surface 11. The effect of the backing heat insulating material 5 is the same as that of the second embodiment of the eaves structure of the present invention. That is, there is an effect of reducing dew condensation near the top of the wall material 22 by suppressing convection of dust and wet air in the building near the roof material lower surface 11. In particular, the eaves vicinity region 6 (broken line) is provided on the roof material lower surface 11 outside the half of the wall material top end 22 without attaching the backing heat insulating material 5. The eaves vicinity area 6 is an area where there is little dust and moist air as a result of suppressing convection by the backing heat insulating material 5.

  FIG. 1B is a cross-sectional view showing the effect of the embodiment. For the above reasons, the amount of dust and wet air in the eaves vicinity region 6 is reduced, so that the condensed water 3 generated on the rubber asphalt sheet 42 is also reduced, and the condensed water 32 transmitted along the inner wall is reduced. Of course, the condensed water 31 does not occur along the outer wall. The effect of the backing heat insulating material 5 is effective in increasing the amount of condensed water falling into the building. FIG. 3C is an enlarged view of part (iii).

  FIG. 6 is a cross-sectional view of the fifth embodiment of the eaves structure of the present invention. In addition to the first to fourth embodiments, the wall eaves engagement portion 232 is filled with a caulking material 7 such as a waterproof putty. It is. In this way, for example, even if a part of the waterproof sheet 41 or the rubber asphalt sheet 42 is torn and condensation occurs on the top of the wall material 22, the caulking material 7 suppresses the generation of condensed water 31 along the outer wall. There is an effect that can be.

  Although the eaves structure of this invention is not limited to a specific magnitude | size, the magnitude | size of each part is clarified as an Example. For example, the thickness of the wall material 2 is approximately 100 millimeters. Further, the distance between the roof material lower surface 11 and the wall material top end 22 is approximately 50 millimeters.

1 ... Roofing material, 11 ... Roofing material lower surface, 12 ... Eaves facing part door,
121 ... eaves-parting face door folding part, 122 ... retaining screw, 2 ... wall material, 21 ... outer wall,
22 ... top of wall material, 23 ... eaves member, 231 ... eaves top, 232 ... wall eaves engagement part,
233 ... Fastening screw, 24 ... Inner wall, 3 ... Condensed water, 31 ... Condensed water along the outer wall,
32 ... Condensed water on the inner wall, 4 ... Convection blocking material, 41 ... Waterproof sheet,
42 ... rubber asphalt sheet, 421 ... bent portion, 422 ... inner wall covering portion,
5 ... Lined insulation, 6 ... Area near the eaves, 7 ... Caulking material, α ... Upward flow,
β1 ... Convection upper flow, β2 ... Convection upper flow, γ ... Downflow.

Claims (4)

  An eaves structure having a gap between a roof material and a wall material, wherein a waterproof sheet is stretched from the inner wall of the wall material, covering the top end of the wall material, to the lower surface of the roof material with an upward slope. Eaves structure.   2. The structure according to claim 1, wherein a backing material is attached to the lower surface of the roof material, and a range in which the backing material is attached is a range of the lower surface of the roof material corresponding to the inside from the center of the wall material. Eave structure.   In Claim 1 or 2, the eaves tip member which has the eaves tip end of the height between the wall material top end and the roof material undersurface is an eaves structure fixed to the wall material, Comprising: The wall material and the above-mentioned An eaves structure characterized by coking treatment at the engagement part of the eaves part. 4. The eaves structure according to claim 1, wherein an eaves tip member having an eaves top end having a height between the top of the wall material and the lower surface of the roof material is fixed to the wall material. The waterproof sheet is an elastic member, and one end portion of the waterproof sheet is folded into a loop shape, and the gap between the lower surface of the roof member and the eaves tip end is formed by the folded loop of the waterproof sheet. The eaves structure is characterized in that after sealing, the waterproof sheet is fixed to the eaves top end, and the other end of the waterproof sheet is fixed to the inner wall of the wall material.