JP2022025399A - Eaves edge structure - Google Patents

Abstract

To provide an eaves edge structure allowing a water return structure to be easily placed even with a pent roof having a short projection.SOLUTION: An eaves edge structure 20 is provided with a building-side water cut-off part 30 placed on an upper end of a building body 2 and a roof-side water cut-off part 40 placed in the vicinity of an end of a roof panel 3. Both of the water cut-off parts (30, 40) form an eaves cut-off part 21 by being parallely arranged in a horizontal direction on a rear side of an eaves gutter 72 when the roof panel 3 is placed on an upper part of the building body 2. The eaves cut-off part 21 comprises: an upper first ventilation slit 48 placed in a vertical plane (41) on the rear side of the eaves gutter 72 in communication with an upper side of the eaves gutter 72 at the roof-side water cut-off part 40; a lower first ventilation slit 49 placed in the vertical plane in communication with a lower side of the eaves gutter 72; and a ventilation passage 80 connecting both of the first ventilation slits (48, 49) to an attic space 22. Both of the water cut-off parts (30, 40) form at least a part of the ventilation passage 80 in an interval which is formed by both being parallelly placed.SELECTED DRAWING: Figure 1

Description

This disclosure relates to the eaves structure.

In a building such as a house, as an eaves structure, there is a case where an eaves is provided at the upper part of the building body so as to be an overhanging part so as to project from the building body. In the eaves structure, it is considered to provide a water return structure in the eaves to ventilate the back of the cabin (see, for example, Patent Document 1).

JP-A-2015-132126

Here, in the above eaves structure, if the eaves have a long overhang, if ventilation is performed from the tip side of the eaves, there is a distance from the tip of the eaves to the living room, so a large-scale water return Often does not require. However, in the above eaves structure, when the eaves have a short overhang, the distance from the tip of the eaves to the living room is short, so that a complicated water return structure is required. However, in the above-mentioned eaves structure, if the eaves have a short overhang amount, the space is physically insufficient, and it is difficult to efficiently arrange the water return structure.

The present disclosure has been made in view of the above circumstances, and an object of the present invention is to provide an eaves structure capable of easily providing a water return structure even for eaves having a short overhang amount.

In order to achieve the above object, the eaves structure of the present disclosure is provided near the building side drainage portion provided at the upper end portion of the building body and the end portion of the roof panel installed at the upper part of the building body. A roof-side drainage section is provided, and the roof-side drainage section and the building-side drainage section are horizontally arranged side by side on the back side of the eaves gutter when the roof panel is installed on the upper part of the building body. The eaves drainage is configured by, and the eaves drainage is provided on a vertical surface extending in the vertical direction on the back side of the eaves gutter in the roof side drainage portion, and is provided with an upper first ventilation slit leading to the upper side of the eaves gutter and the vertical. It has a lower first ventilation slit that is provided on the surface and leads to the lower side of the eaves gutter, and a ventilation passage that connects the upper first ventilation slit and the lower first ventilation slit to the space behind the roof. The roof-side drainage portion and the building-side drainage portion form at least a part of the ventilation passage between the roof-side drainage portions and the building-side drainage portions arranged side by side at intervals.

Here, the ventilation passage has a first passage portion extending downward from the upper first ventilation slit, a second passage portion extending upward from the lower first ventilation slit, and the first passage portion. It has a third passage portion extending from the confluence of the second passage portion and the second passage portion toward the cabin back space, and the second passage portion is between the roof side drain portion and the building side drain portion. Can be formed of.

Further, the eaves drainage has a second ventilation slit in the first passage portion that penetrates the roof side drainage portion in a direction different from that of the upper first ventilation slit, and in the roof panel, the cabin back space. A wall ventilation surface door is provided between the door and the third passage portion, and the wall ventilation surface door has a third ventilation slit that penetrates the wall ventilation surface door in a direction different from that of the second ventilation slit. May be provided. Further, in the building side drainage portion, a lower end eaves portion extending to the lower side of the lower end of the roof side drainage portion is provided in a state where the eaves drainage portion is configured, and the roof side drainage portion is vertically aligned with the lower end portion. The length may be set so as to provide a gap between the lower end eaves and the lower eaves.

In the eaves structure of the present disclosure configured in this way, a water return structure can be easily provided even if the eaves have a short overhang amount.

Here, the ventilation passage includes a first passage portion extending downward from the upper first ventilation slit, a second passage portion extending upward from the lower first ventilation slit, and the first passage portion. It has a third passage portion extending from the confluence of the second passage portion and the second passage portion toward the cabin back space, and the second passage portion is between the roof side drain portion and the building side drain portion. With the configuration formed by, the momentum of wind and rain invading from both ventilation slits can be weakened, and the invasion of wind and rain into the space behind the cabin can be effectively suppressed.

The eaves drain has a second ventilation slit in the first passage portion that penetrates the roof side drain portion in a direction different from that of the upper first ventilation slit, and in the roof panel, the cabin back space and the said. A wall ventilation surface door is provided between the third passage portion, and the wall ventilation surface door is provided with a third ventilation slit that penetrates the wall ventilation surface door in a direction different from that of the second ventilation slit. With this configuration, the momentum of wind and rain that has entered from the upper first ventilation slit can be weakened more effectively, and the momentum of wind and rain that has entered through both first ventilation slits and passed through the third passage portion can be reduced. It can be weakened more effectively, and the invasion of wind and rain into the space behind the hut can be effectively suppressed. In the building side drainage portion, a lower end eave portion extending to the lower side of the lower end of the roof side drainage portion is provided in a state where the eaves drainage portion is configured, and the roof side drainage portion has the lower end and the lower end in the vertical direction. If the length is set so as to provide a gap between the eaves and the eaves, it is possible to prevent the roof side drainage part and the building side drainage part from interfering with each other when installing the roof panel in the building unit, which is appropriate. A drainage can be placed at the eaves to provide a water return structure.

It is a vertical cross-sectional view which shows the eaves structure which concerns on this disclosure. It is explanatory drawing which shows the drainage part on a building side, (a) shows the perspective view, and (b) shows the sectional view obtained along the line I (I). It is explanatory drawing which shows the state which the building side drainage part is provided in a building unit. It is explanatory drawing which shows the roof side drainage part, (a) shows the front view, and (b) shows the sectional view obtained along the line II-II. It is explanatory drawing which shows the ventilation surface door on the wall, (a) shows the front view, and (b) shows the sectional view obtained along the line III-III. It is explanatory drawing which shows the state that the roof side drainage part is provided in the roof panel. It is explanatory drawing which shows the state that each bracket was attached to the roof side drainage part, (a) shows the front view, and (b) shows the cross-sectional view obtained along the IV-IV line. It is explanatory drawing which shows a mode that the roof panel provided with the roof side drainage part is attached to the building unit provided with the building side drainage part. It is explanatory drawing which shows FIG. 8 with the same cross section as FIG.

An example of the eaves structure according to the present disclosure will be described below with reference to the drawings.

As the first embodiment according to the present disclosure, the eaves structure 20 provided with the eaves drain 21 in the eaves 5 of the building 1 will be described with reference to FIGS. 1 to 9. The eaves structure 20 ventilates the cabin back space 22 (shelter back ventilation) by forming a water return structure with the eaves drain 21. In the first embodiment, the eaves structure 20 is provided in a building 1 such as a unit building. It is provided.

The building 1 is a detached house, an apartment house, or the like, and a roof panel 3 is installed on the upper part of the building body 2 so as to project outward from the building body 2, and an eave 4 is formed. The eaves 4 of the first embodiment are said to have a short overhang amount. In the building 1, the eaves structure 20 is applied to the eaves 5 formed by the short eaves 4. In the following, the direction in which the eaves 4 (roof panel 3) overhangs when viewed from the building body 2 is also referred to as the eaves side.

Here, the building 1 may have any structure as long as the roof panel 3 is attached to the building main body 2, but in the first embodiment, it is a unit building. The unit building is a structure in which a substantially rectangular parallelepiped building unit manufactured in advance at a factory is transported to a construction site and assembled at the construction site so that the building 1 can be constructed in a short period of time. The building unit includes a steel unit (steel unit) and a wooden unit (wooden unit), but in the first embodiment, it is made of steel. As shown in FIG. 3 and the like, the steel building unit connects the upper ends of the four pillars 6 in a rectangular shape with four roof beams 7, and four columns between the lower ends of the four pillars 6. It has a unit frame with a box rigid frame structure that is connected in a rectangular shape by the floor beams of.

The building body 2 is composed of a plurality of building units. FIG. 3 and the like show the vicinity of the roof beam 7 of the building unit on the uppermost floor in the building body 2. In the building main body 2, the eaves structure 20 is applied to the eaves 5 in the vicinity of the pair of wife roof beams 7a in the roof beams 7. In the building main body 2, as shown in FIG. 1 and the like, an outer wall panel as an outer wall 8 is attached to the outside of the wife roof beam 7a. The upper end portion of the outer wall 8 is set to be substantially the same height as the upper end portion of the wife roof beam 7a. In this end roof beam 7a, a plurality of mounting holes 7c (see FIG. 3) are provided at intervals in the long direction. Further, in the building main body 2 of the first embodiment, as shown in FIGS. 1 and 3, a connecting beam 11 is provided at least on the uppermost floor. The connecting beam 11 has a U-shaped cross section, and is provided so as to span the two girder roof beams 7b while being parallel to the two end roof beams 7a.

As shown in FIGS. 1, 6 and the like, the roof panel 3 is installed on the upper part of the building unit on the uppermost floor of the building body 2, and has a plurality of parallel roof frames 12 in the first embodiment. The roof frame 12 is extended so as to span a pair of wife roof beams 7a. In the roof panel 3, a field board 14 serving as a roof surface material is attached to the inside of the roof frame 12 via a wooden rail 13 (field board receiving wood rail). A roofing material 15 is provided on the upper surface of the field board 14. In the roof panel 3 of the first embodiment, a plurality of solar panels 17 are installed above the roofing material 15 via a base steel plate 16 or the like. Each solar panel 17 generates electricity by using energy from sunlight, and the obtained electric power is appropriately sent to a building 1 or the like. The roof frame 12 is covered with the cover member 18 from above. The roof panel 3 having such a configuration is fixed to the upper end of the girder roof beam 7b with a fixture 19 (see FIG. 8) such as a bolt / nut set, and is installed on the upper part of the building body 2. The roof panel 3 may be installed on the upper part of the building body 2, and is not limited to the structure of the first embodiment.

In the roof panel 3 of the first embodiment, as shown in FIG. 1 and the like, the roof frame 12, the wooden rail 13, the field board 14, and the like are horizontally oriented and the eaves side is substantially the surface of the outer wall 8 in the state of being installed in the building body 2. It is said to be the length to the position of (outer surface). On the other hand, in the roof panel 3, when the roof panel 3 is installed on the upper part of the building main body 2, the base steel plate 16 and the cover member 18 have a length that slightly protrudes outward from the position of the surface of the outer wall 8. The amount of protrusion from these outer walls 8 is about half the width of the eaves gutter 72 provided at the eaves tip 5, and rainwater from the roof panel 3 is supposed to directly enter the eaves gutter 72. As a result, in the building 1, the eaves 4 having a short overhang amount are formed.

Next, the configuration of the eaves structure 20 in the eaves 5 under the eaves 4 will be described. The eaves structure 20 is provided with an eaves drain 21 capable of ventilating the back of the cabin at the eaves 5 of the building 1. The eaves drainage 21 includes a building-side drainage portion 30 and a roof-side drainage portion 40. The drainage portion 30 on the building side is provided at the upper end edge of the building body 2 so as to project from the outer wall 8 of the building body 2 toward the eaves side. The roof-side drainage portion 40 is provided at the end of the roof panel 3 on the eaves side below the eaves 4. When the roof panel 3 is installed on the upper part of the building main body 2, the building-side drainage portion 30 and the roof-side drainage portion 40 are arranged horizontally on the back side of the eaves gutter 72 to form the eaves-side drainage portion 21.

As shown in FIG. 2, the building-side drainage portion 30 is formed by bending a long plate-shaped member, and the horizontal portion 31, the inclined portion 32, the vertical portion 33, and the lower end eaves portion 34 are formed in this order from the upper side. Have. The horizontal portion 31 has a flat plate shape extending along the horizontal direction, and is a portion to be attached to the wife roof beam 7a of the building body 2. In the horizontal portion 31, a plurality of mounting holes 31a are provided at intervals in the long direction. Each mounting hole 31a has a positional relationship corresponding to the mounting hole 7c of the end roof beam 7a.

The inclined portion 32 is a portion that protrudes from the wife roof beam 7a to the outside of the building body 2 beyond the outer wall 8 in a state of being attached to the wife roof beam 7a (see FIG. 1 and the like), and gradually toward the outside. It has a flat plate shape that inclines downward. The vertical portion 33 has a flat plate shape extending downward along a substantially vertical direction from the outer end portion of the inclined portion 32. The lower end eaves portion 34 has a flat plate shape that is inclined downward from the lower end portion of the vertical portion 33 toward the outside. In the lower end eaves portion 34, a hemming portion folded back at 180 ° is formed and reinforced so that the lower end portion is partially doubled.

As shown in FIGS. 1 and 3, the building-side drainage portion 30 is attached to the end roof beam 7a together with the spacer 35. The spacer 35 is a rectangular plate member formed of a metal material, and a mounting hole 35a is provided substantially in the center thereof.

The building side drainage portion 30 is attached to the building body 2 as follows. First, in the building main body 2 before the roof panel 3 is installed, the horizontal portion 31 is addressed on the wife roof beam 7a and the roof side drainage portion 40 is arranged, and the mounting holes 35a are provided in the respective mounting holes 31a. Each spacer 35 is arranged so as to match. After that, a fixing tool 36 such as a bolt / nut set is attached through the mounting holes 35a of each spacer 35, the mounting holes 31a of the drainage portion 30 on the building side, and the mounting holes 7c of the end roof beam 7a. As a result, the drainage portion 30 on the building side is attached to the end roof beam 7a together with the spacer 35. At this time, in the drainage portion 30 on the building side, sealing materials 37 are provided above and below the inclined portion 32. The sealing material 37 is provided between the upper surface of the inclined portion 32 and the lower flange 63 of the wall ventilation surface door 60 described later, and between the lower surface of the inclined portion 32 and the outer wall 8, respectively. The sealing material 37 is appropriately attached with an adhesive or an adhesive to ensure the sealing property with the outside of the building body 2 at the provided portion.

As shown in FIG. 4, the roof-side drainage portion 40 is formed by bending a long plate-shaped member, and has a vertical portion 41, an outer horizontal portion 42, a folded portion 43, an inner horizontal portion 44, and a mounting portion 45. And the eaves portion 46.

The vertical portion 41 has a flat plate shape extending substantially along the vertical direction, and constitutes a vertical surface extending in the vertical direction at the roof-side drainage portion 40 (see FIG. 1 and the like). When the roof panel 3 is installed in the building body 2, the vertical portion 41 faces the vertical portion 33 of the building side drainage portion 30 at a predetermined distance in the horizontal direction on the lower side. Further, the vertical portion 41 has a length such that a gap is provided between the lower end 41a and the lower end eaves portion 34 in the vertical direction when the roof panel 3 is installed on the upper part of the building body 2.

The outer horizontal portion 42 has a flat plate shape formed by bending from the upper end of the vertical portion 41 toward the outside (the eaves side). The outer horizontal portion 42 is a portion facing the lower surface of the eaves 4 of the roof panel 3, and a waterproof sealing material 47 is provided between the outer horizontal portion 42 and the eaves 4. The waterproof sealing material 47 is provided in contact with the outer horizontal portion 42 and the eaves 4, and secures waterproofness between them. The waterproof sealing material 47 is appropriately attached to the outer horizontal portion 42 and the eaves 4 with an adhesive or an adhesive. The folded-back portion 43 has a flat plate shape formed by bending downward from the outer end of the outer horizontal portion 42. In the folded portion 43, a hemming portion is formed and reinforced in the same manner as the lower end eaves portion 34.

The inner horizontal portion 44 is provided at a lower position in the vertical portion 41 at a predetermined distance in the vertical direction from the outer horizontal portion 42, and is formed by bending from the vertical portion 41 toward the inside (building 1 side). It is said to be in the shape. The mounting portion 45 has a flat plate shape formed by bending upward from the inner end of the inner horizontal portion 44. The mounting portion 45 is a portion addressed to the vertical portion 61 for mounting on the wall ventilation surface door 60, which will be described later. The eaves portion 46 is provided at a position in the vertical portion 41 at a predetermined distance in the vertical direction from the lower end 41a, and has a flat plate shape that is inclined downward from the vertical portion 41 toward the outside. ..

The roof-side drainage portion 40 is provided with an upper first ventilation slit 48, a lower first ventilation slit 49, and a second ventilation slit 51. The upper first ventilation slit 48 and the lower first ventilation slit 49 are provided so as to penetrate the vertical portion 41 in the horizontal direction. The upper first ventilation slit 48 is provided at a position above the inner horizontal portion 44 and below the outer horizontal portion 42. The lower first ventilation slit 49 is provided at a position below the inner horizontal portion 44 and above the eaves portion 46. The second ventilation slit 51 is provided so as to penetrate the inner horizontal portion 44 in the vertical direction.

The roof-side drainage portion 40 of the first embodiment is composed of a first plate member 40A and a second plate member 40B. The first plate member 40A is located on the outer side of the roof side drainage portion 40, and forms a folded portion 43, an outer horizontal portion 42, a vertical portion 41, and an eaves portion 46. The second plate member 40B is located inside the roof side drainage portion 40, and forms a mounting portion 45, an inner horizontal portion 44, and a vertical portion 41. Although not shown, the first plate member 40A and the second plate member 40B are overlapped with each other by a fixing tool such as a rivet, and are integrated to form a roof-side drainage portion 40. In the roof-side drainage portion 40 of the first embodiment, the upper first ventilation slit 48 penetrates the first plate member 40A, and the lower first ventilation slit 49 penetrates the first plate member 40A and the second plate member 40B. The second ventilation slit 51 penetrates the second plate member 40B. Then, in the roof-side drainage portion 40 of the first embodiment, the eaves portion 46 is formed by bending the notched portion as the lower first ventilation slit 49 in the first plate member 40A. The roof-side drainage portion 40 may have each of the above portions (signs 41 to 46) and each slit (48, 49, 51), and is not limited to the configuration of the first embodiment.

As shown in FIGS. 1, 5 and the like, the roof panel 3 is provided with a ventilation surface door 60 on the wall at the boundary between the cabin back space 22 and the outside. The cabin back space 22 is a space formed in the roof panel 3 above the building body 2 when the roof panel 3 is attached to the building body 2. The wall ventilation surface door 60 is configured by bending a long plate-shaped member, and has a vertical portion 61, an upper flange 62, and a lower flange 63. The vertical portion 61 has a flat plate shape extending substantially along the vertical direction. The vertical portion 61 is arranged at the upper end of the outer wall 8 to form a boundary between the cabin back space 22 and the outside. The vertical portion 61 is elongated in a direction orthogonal to the paper surface when FIG. 1 is viewed from the front, and joint members 64 are appropriately provided at both ends in the elongated direction.

The upper flange 62 is assumed to extend outward from the upper end portion of the vertical portion 61. The upper flange 62 is attached to the lower surface of the roof panel 3 such as the base steel plate 16 on the outside of the end portion of the field plate 14 on the eaves side. The lower flange 63 is assumed to extend inward from the lower end portion of the vertical portion 61. The lower flange 63 is addressed to the inclined portion 32 of the building side drainage portion 30 via the sealing material 37 as described above.

The wall ventilation surface door 60 is provided with a third ventilation slit 65 and an eaves portion 66. The third ventilation slit 65 is provided below the center of the vertical portion 61 in the vertical direction and penetrates the vertical portion 61 in the horizontal direction. Therefore, the third ventilation slit 65 is a place where the wall ventilation surface door 60 communicates with the cabin back space 22 and the outside. The eaves portion 66 is provided above the third ventilation slit 65, and is formed into a flat plate shape that is inclined downward from the vertical portion 61 toward the outside and then downward along the substantially vertical direction. There is.

Further, as shown in FIG. 1, the roof panel 3 is provided with an eaves drainage receiving metal fitting 67 for attaching the wall ventilation surface door 60 and the roof side drainage portion 40. The eaves drainage bracket 67 is attached to the tip of the wooden rail 13 on the back side of the wall ventilation surface door 60. The wall ventilation surface door 60 is fixed to the roof panel 3 by fitting a fixing tool 68 such as a screw from the outside through a vertical portion 61 to the eaves drainage receiving metal fitting 67. Further, as shown in FIGS. 1 and 6, the roof-side drainage portion 40 has a fixing tool 69 such as a screw outward in a state where the mounting portion 45 is addressed to the vertical portion 61 of the wall ventilation surface door 60. It is fixed to the roof panel 3 by being fitted to the eaves drainage receiving metal fitting 67 through the mounting portion 45 and the vertical portion 61. As a result, the roof-side drainage portion 40 is attached to the roof panel 3 on the outside of the wall ventilation surface door 60.

As shown in FIGS. 1 and 7, a bracket 71 (eave gutter support bracket) is attached to the roof side drainage portion 40. The bracket 71 is a member for providing the eaves gutter 72 on the eaves tip 5, and has an outer support portion 71a, an inner support portion 71b, and a mounting portion 71c. A plurality of brackets 71 are provided at required intervals in the direction in which the roof-side drainage portion 40 extends. Each bracket 71 is provided at a predetermined position of the roof-side drainage portion 40 by screwing a fixing tool 73 such as a screw into the vertical portion 41 of the roof-side drainage portion 40 through the mounting portion 71c.

The eaves gutter 72 is a gutter provided at the eaves tip 5, and is provided along the direction in which the roof side drainage portion 40 extends. The eaves gutter 72 has a bottom surface 72a, an outer rising portion 72b, and an inner rising portion 72c, and has a substantially U-shaped cross section orthogonal to the extending direction. In the eaves gutter 72, the vicinity of the upper edge portion of the outer rising portion 72b is fitted into the outer support portion 71a of each bracket 71, and the vicinity of the upper edge portion of the inner rising portion 72c is fitted into the inner support portion 71b of each bracket 71. Then, it is attached to the roof side drainage portion 40 via each bracket 71. Then, the roof side drainage portion 40 is in a positional relationship hidden behind the inner rising portion 72c of the eaves gutter 72.

Next, the installation of the eaves drainage 21 will be described. First, the building-side drainage portion 30 and the roof-side drainage portion 40 are attached to the building body 2 or the roof panel 3 at the factory before the roof panel 3 is installed on the building body 2 on the top floor. As described above, the building-side drainage portion 30 is attached to the double-sided roof beams 7a of the building body 2 together with the spacers 35 by using the fixtures 36 (see FIG. 3). Further, the roof side drain portion 40 is attached to the roof panel 3 via the wall ventilation surface door 60 by fitting each fixture 69 into the eaves drain drain fitting 67 as described above (see FIG. 6). ). In the roof panel 3, the eaves gutter 72 is attached to the roof side drainage portion 40 via each bracket 71 as described above (see FIG. 1).

The building body 2 is provided at the construction site as in the conventional case. After that, at the construction site, as shown in FIGS. 8 and 9, the roof panel 3 is suspended by the suspension mechanism 74 with the double girder roof beams 7b supported by the plurality of clips 74a, and the building body 2 is suspended. It is placed above. After that, the roof panel 3 is lowered onto the building body 2 by the suspension mechanism 74, and is fixed to the upper end portion of the double girder roof beam 7b by the fixture 19, so that the roof panel 3 is installed on the upper part of the building body 2.

Then, in the eaves 5, as shown in FIG. 1, the eaves gutter 72 and the roof side drainage portion 40 are lined up in order from the eaves side in the horizontal direction, and the building side drainage portion 30 and the wall ventilation surface door 60 are inside the eaves gutter 72. And are lined up in the vertical direction. At this time, the vertical portion 41 of the roof-side drainage portion 40 has a length that provides a gap between the lower end 41a and the lower end eaves portion 34 of the building-side drainage portion 30 in the vertical direction. It is prevented that the roof side drainage portion 40 and the building side drainage portion 30 interfere with each other when the 3 is installed. The roof side drainage portion 40 and the building side drainage portion 30 form the eaves tip drainage portion 21 on the back side of the eaves gutter 72 by arranging the vertical portion 41 and the vertical portion 33 in the horizontal direction at a predetermined interval. The eaves structure 20 is formed together with the ventilation surface door 60 on the wall.

The eaves drain 21 forms a ventilation passage 80 that connects the upper first ventilation slit 48 and the lower first ventilation slit 49 provided in the roof side drain portion 40 to the cabin back space 22 in the roof panel 3. The ventilation passage 80 has a first passage portion 81, a second passage portion 82, and a third passage portion 83.

The first passage portion 81 is located below the upper first ventilation slit 48 of the vertical portion 41 between the vertical portion 41 of the roof-side drainage portion 40, the vertical portion 61 of the wall ventilation surface door 60, and the eaves portion 66. It is growing toward. The upper first ventilation slit 48 is located above the vertical portion 41 on the back side of the eaves gutter 72 and leads to the upper side of the eaves gutter 72. The first passage portion 81 is supposed to pass through the second ventilation slit 51 that penetrates the inner horizontal portion 44 of the roof side drainage portion 40 in the vertical direction.

The second passage portion 82 extends upward from the lower first ventilation slit 49 of the vertical portion 41 between the vertical portion 41 of the roof side drainage portion 40 and the vertical portion 33 of the building side drainage portion 30. .. The lower first ventilation slit 49 is located below the vertical portion 41 on the back side of the eaves gutter 72, and leads to the lower side of the eaves gutter 72.

The third passage portion 83 extends from the confluence of the first passage portion 81 and the second passage portion 82 toward the cabin back space 22. The third passage portion 83 leads to the third ventilation slit 65 of the wall ventilation surface door 60 between the eaves portion 66 of the wall ventilation surface door 60 and the inclined portion 32 of the building side drainage portion 30. The third passage portion 83 is connected to the cabin back space 22 through the third ventilation slit 65.

As described above, in the eaves structure 20, the eaves drainage 21 is provided on the eaves 5 by installing the roof panel 3 to which the roof side drainage portion 40 is attached on the building main body 2 to which the building side drainage portion 30 is attached. Can be done. Since the building-side drainage portion 30 and the roof-side drainage portion 40 can be attached to the building body 2 or the roof panel 3 in advance at the factory, the attachment work can be simplified. Therefore, the eaves structure 20 does not require complicated work at the construction site even if the eaves 4 have a short overhang, and the installation work at the factory is simplified. The eaves drain 21 can be placed on the back side of the 72.

In this eaves structure 20, a gap for ventilation is formed by the eaves drain 21 at the position on the back side (building 1 side) of the eaves gutter 72, and the eaves drain 21 can basically block wind and rain. The eaves drainage 21 is an eaves 4 having a short overhang amount because it is ventilated by the upper first ventilation slit 48 and the lower first ventilation slit 49 provided in the portion covered by the back surface of the eaves gutter 72. It is possible to efficiently return water while ensuring ventilation performance. Further, since the eaves drainage 21 is provided with an upper first ventilation slit 48 leading to the upper side of the eaves gutter 72 and a lower first ventilation slit 49 leading to the lower side of the eaves gutter 72, wind and rain entering from one side can be absorbed from the other side. Can be discharged from.

In the eaves structure 20, the first passage portion 81 extends downward from the upper first ventilation slit 48, and a second ventilation slit 51 having a direction different from that of the upper first ventilation slit 48 is provided in the middle thereof. ing. Therefore, the eaves structure 20 can weaken the momentum of the wind and rain that has entered the first passage portion 81 from the upper first ventilation slit 48. Further, in the eaves structure 20, the second passage portion 82 extends upward from the lower first ventilation slit 49. Therefore, the eaves structure 20 can weaken the momentum of the wind and rain that has entered the second passage portion 82 from the lower first ventilation slit 49.

In the eaves structure 20, the third passage portion 83 extends from the confluence position of the first passage portion 81 and the second passage portion 82 toward the building 1 side, and the third ventilation slit of the wall ventilation surface door 60 is provided. It is connected to the cabin back space 22 via 65. Therefore, the eaves structure 20 can further weaken the momentum of wind and rain passing through the first passage portion 81 and the second passage portion 82, and the on-wall ventilation surface door 60 blocks the intrusion of wind and rain into the cabin back space 22. can. In addition, since the eaves structure 20 is provided with the eaves portion 66 in the ventilation surface door 60 on the wall, it is possible to more effectively suppress the invasion of wind and rain, especially rain, into the third ventilation slit 65. From these facts, the eaves structure 20 can easily provide a more effective water return structure.

In the eaves structure 20, the drainage portion 30 on the building side is attached to the end roof beam 7a together with the spacer 35. Therefore, in the drainage portion 30 on the building side, when snow (including ice) that has invaded the second passage portion 82 and the third passage portion 83 adheres to the inclined portion 32, the vertical portion 33, and the lower end eaves portion 34, the snow accumulates. The load can be transmitted to the wife roof beam 7a via the entire surface of the spacer 35. As a result, the eaves structure 20 can appropriately release the load even when snow adheres to the drainage portion 30 on the building side. In addition, in the building 1, since the connecting beam 11 is provided by extending the double girder roof beams 7b in the building main body 2, the eaves drainage 21 especially the building side drainage portion 30 is loaded by the wind. Also, the connecting beam 11 suppresses the distortion of the rectangular connected state of the four roof beams 7. That is, in the building 1, the load due to the wind received by the eaves drainage 21 and particularly the building side drainage portion 30 can be borne by the connecting beam 11.

The eaves structure of Example 1 according to the present disclosure can obtain the following effects.

In the eaves structure 20, when the roof panel 3 is installed on the upper part of the building body 2, the roof-side drainage portion 40 and the building-side drainage portion 30 are arranged side by side in the horizontal direction on the back side of the eaves gutter 72 to form the eaves-end drainage 21. The eaves drain 21 has an upper first ventilation slit 48, a lower first ventilation slit 49, and a ventilation passage 80. Therefore, in the eaves structure 20, even if the eaves 4 have a short overhang, the eaves drain 21 can be easily arranged on the back side of the eaves gutter 72 to provide a water return structure.

The eaves structure 20 forms at least a part of the ventilation passage 80 between the roof side drainage portion 40 and the building side drainage portion 30 arranged side by side at intervals. Therefore, in the eaves structure 20, the ventilation passage 80 can be formed by utilizing the positional relationship between the building-side drainage portion 30 and the roof-side drainage portion 40, which are separately provided, and an effective water return structure can be easily provided. can.

In the eaves structure 20, the ventilation passage 80 has a first passage portion 81, a second passage portion 82, and a third passage portion 83, and the second passage portion 82 has a roof side drain portion 40 and a building side drain portion 30. Is formed between. Therefore, the eaves structure 20 can weaken the momentum of the wind and rain invading from both first ventilation slits (48, 49), and can effectively suppress the invasion of the wind and rain into the cabin back space 22.

In the eaves structure 20, the first passage 81 of the eaves drain 21 has a second ventilation slit 51. Therefore, the eaves structure 20 can more effectively weaken the momentum of the wind and rain invading from the upper first ventilation slit 48, and can effectively suppress the invasion of the wind and rain into the cabin back space 22.

In the eaves structure 20, the roof panel 3 is provided with a ventilation surface door 60 on the wall, and a third ventilation slit 65 is provided there. Therefore, the eaves structure 20 can invade from both first ventilation slits (48, 49) and more effectively weaken the momentum of the wind and rain passing through the third passage portion 83, and the wind and rain to the cabin back space 22. Invasion can be effectively suppressed.

In the eaves structure 20, the eaves portion 66 is provided above the third ventilation slit 65 in the wall ventilation surface door 60. Therefore, the eaves structure 20 can more effectively suppress the invasion of wind and rain, especially rain, into the third ventilation slit 65, and can effectively suppress the invasion of wind and rain into the cabin back space 22.

The eaves structure 20 has a length such that the roof side drain portion 40 provides a gap between the lower end 41a and the lower end eaves portion 34 in the vertical direction in the state where the eaves drain 21 is configured. Therefore, the eaves structure 20 can prevent the roof side drain portion 40 and the building side drain portion 30 from interfering with each other when the roof panel 3 is installed on the building body 2, and the eaves drain portion 21 is appropriately arranged. Can form a water return structure.

In the eaves structure 20, the roof side drainage portion 40 is attached to the wife roof beam 7a of the building body 2 together with the spacer 35. Therefore, even if snow adheres to the drainage portion 30 on the building side, the eaves structure 20 can transmit the load to the roof beam 7a and release it.

Therefore, in the eaves structure 20 of the present disclosure, the water return structure can be easily provided even for the eaves 4 having a short overhang amount.

Although the eaves structure of the present disclosure has been described based on the first embodiment, the specific configuration is not limited to the first embodiment and does not deviate from the gist of the invention according to each claim. As long as the design is changed or added, it is permissible.

For example, in the first embodiment, in the roof side drainage portion 40, the vertical portion 41 provided with the upper first ventilation slit 48 and the lower first ventilation slit 49 is assumed to extend in the vertical direction, but in a strict sense, it is vertical. It does not have to extend in the direction and is not limited to the configuration of the first embodiment.

Further, in the first embodiment, the second ventilation slit 51 penetrates the inner horizontal portion 44 extending in the horizontal direction in the roof side drainage portion 40, but the roof side drainage portion is in a different direction from the upper first ventilation slit 48. It suffices to penetrate 40, and is not limited to the configuration of the first embodiment.

Further, in the first embodiment, the third ventilation slit 65 penetrates the vertical portion 61 extending in the vertical direction in the wall ventilation surface door 60, but the wall ventilation surface door has a different direction from the second ventilation slit 51. It suffices to penetrate 60, and is not limited to the configuration of the first embodiment.

2 Building body 3 Roof panel 20 Eaves structure 21 Eaves drain 22 Hut back space 30 Building side drain 34 Lower eaves 35 Spacer 40 Roof side drain 41 (as a vertical face) Vertical part 41a Lower end 48 Upper first ventilation slit 49 Lower 1st ventilation slit 51 2nd ventilation slit 60 On-wall ventilation surface door 65 3rd ventilation slit 66 Eaves 72 Eaves 80 Ventilation passage 81 1st passage 82 2nd passage 83 3rd passage

Claims (4)

The drainage part on the building side provided at the upper end of the building body,
It is provided with a roof-side drainage portion provided near the end of the roof panel installed on the upper part of the building body.
When the roof panel is installed on the upper part of the building body, the roof-side drainage portion and the building-side drainage portion are horizontally arranged side by side on the back side of the eaves gutter to form an eaves drainage portion.
The eaves drainage is provided on a vertical surface extending in the vertical direction on the back side of the eaves gutter in the roof side drainage portion, and is provided with an upper first ventilation slit leading to the upper side of the eaves gutter and the eaves provided on the vertical surface. It has a lower first ventilation slit leading to the lower side of the gutter, and a ventilation passage connecting the upper first ventilation slit and the lower first ventilation slit to the space behind the cabin.
An eaves structure characterized in that the roof-side drainage portion and the building-side drainage portion form at least a part of the ventilation passage between the drainage portions on the roof side and the drainage portion on the building side. The ventilation passage includes a first passage portion extending downward from the upper first ventilation slit, a second passage portion extending upward from the lower first ventilation slit, the first passage portion, and the first passage portion. It has a third aisle that extends from the confluence with the two aisles toward the space behind the hut.
The eaves structure according to claim 1, wherein the second passage portion is formed between the roof-side drainage portion and the building-side drainage portion. The eaves drainage has a second ventilation slit in the first passage portion that penetrates the roof side drainage portion in a direction different from that of the upper first ventilation slit.
In the roof panel, a ventilation surface door on the wall is provided between the cabin back space and the third passage portion.
The eaves structure according to claim 2, wherein the wall ventilation surface door is provided with a third ventilation slit penetrating the wall ventilation surface door in a direction different from that of the second ventilation slit. In the building side drainage portion, a lower end eaves portion extending to the lower side of the lower end of the roof side drainage portion is provided in a state where the eaves drainage portion is configured.
The one according to any one of claims 1 to 3, wherein the roof-side drainage portion has a length such that a gap is provided between the lower end portion and the lower end eaves portion in the vertical direction. Eaves structure.

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