JP2013057213A - Ventilation structure for building - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a ventilation structure for a building in which a ventilation furring strip is efficiently provided.SOLUTION: In a unit building 10 for which a ventilation structure S1 for the building is applied, a ventilation furring strip 50 is provided between a mounting face 42A of an outer wall material 40 and a side wall part 30A of a steel sheet accessory 30, and an eaves gutter 70 is fixed to the outer wall material 40 with a tapping screw 78 in the state that the ventilation furring strip 50 exists therebetween. The eaves gutter 70 is, therefore, supported on the outer wall material 40 integrally with the ventilation furring strip 50. Still, when the eaves gutter 70 is fixed to the outer wall material 40, the ventilation furring strip 50 functions as a substrate material, and so the eaves gutter 70 can be stably connected to the outer wall material 40 without using a plate in a conventional eaves edge structure or the like for mounting the eaves gutter 70. Thus, the ventilation furring strip 50 having a ventilating function is utilized to connect the eaves gutter 70 to the outer wall material 40. As a result, the ventilation furring strip 50 is efficiently provided.

Description

  The present invention relates to a ventilation structure for a building in consideration of ventilation between an attic and the outdoors.

  In general, in a building with a flat roof, it is desired to ventilate the attic without impairing the design performance of the building. For this reason, in the eaves-end structure with a ventilation function described in Patent Document 1 below, an entrance / exit of a ventilation passage is provided outside the outer wall, and a ventilation passage along the outer wall surface is formed.

  If this eaves-end structure is explained in full detail, the nose cover is provided in the outer side of the upper part of an outer wall, and the lower side return part is formed in the lower end of a nose cover. A space between the lower folded portion and the outer wall serves as an entrance / exit of the ventilation passage. Further, an eaves ridge is provided on the outside of the nasal concealment, and the eaves ridge is attached together with the nasal concealment to a tip side main house plate provided on the inside of the nasal concealment.

  Furthermore, joint material is provided above the entrance / exit of the ventilation passage, and many small holes for ventilation are formed in the joint material. Thereby, the ventilation passage and the outdoors are communicated with each other through the ventilation hole.

Japanese Patent Laid-Open No. 2005-180090

  However, in this eaves-end structure, as described above, the tip side purlin plate is intentionally extended inside the nose cover to attach the eaves rod, and the joint material is the tip portion of the tip side purlin plate (lower side). Side horizontal part) and the outer wall. That is, in this eaves tip structure, the base material for fixing the eaves and the joint material having air permeability exist separately and independently. For this reason, in this eaves-end structure, there is room for improvement in terms of efficiently providing a joint material having a ventilation function (ventilation function).

  In view of the above fact, an object of the present invention is to provide a ventilation structure for a building that can efficiently provide a ventilation trunk edge.

  The ventilation structure for a building according to claim 1 is provided on the outside of the upper part of the outer wall, and is provided on the outer side of the ventilation trunk edge, and the ventilation trunk edge formed with a ventilation groove for communicating between the attic and the outdoors. And an eave ridge fixed to the outer wall with the ventilator edge interposed.

  In the ventilation structure for a building according to the first aspect, the ventilation trunk edge is attached to the outside of the upper portion of the outer wall. A ventilation groove is formed in the ventilation trunk edge, and the attic communicates with the outside through the ventilation groove. Thereby, the attic is ventilated through the ventilation groove.

  Here, the eaves is fixed to the outer wall with the ventilator edge interposed. Therefore, the eaves can be integrally supported on the outer wall together with the ventilator edge without using a plate for attaching the eaves as in the conventional eaves structure. In addition, when the eaves ridge is fixed to the outer wall, the ventilator rim functions as a base material, so that the eave ridge can be stably fixed to the outer wall. Thereby, the eaves can be stably fixed to the outer wall by using the ventilation trunk edge having a ventilation function.

  The building ventilation structure according to claim 2 is the building ventilation structure according to claim 1, wherein the ventilation structure is provided between the ventilation drum edge and the eaves wall to shield the ventilation drum edge from the outside. A shielding part that has a bent portion bent toward the outer wall side below the ventilator rim, and that forms a vent inlet / outlet between a tip of the bent part and the outer wall, wherein the vent groove has the ventilator edge It is provided in the outer side of.

  In the ventilation structure for a building according to claim 2, a shielding part is provided between the ventilation trunk edge and the eaves wall, and the ventilation trunk edge is shielded from the outside by the shielding part. Further, the shielding part has a bent part bent toward the outer wall side below the ventilator edge, and a ventilation inlet / outlet is formed between the tip of the bent part and the outer wall. As a result, the ventilation inlet / outlet is provided adjacent to the outer wall, and a ventilation path from the ventilation inlet / outlet to the ventilation groove is formed below the ventilation trunk edge.

  Here, the ventilation groove is provided in the outer side part of the ventilation trunk edge. For this reason, since the ventilation groove is provided in the part on the opposite side to the outer wall of the ventilation trunk edge, the ventilation inlet / outlet and the ventilation groove are shifted in the thickness direction of the ventilation trunk edge in a plan view. As a result, the ventilation path has a labyrinth structure, and the intrusion of rainwater from the ventilation entrance to the ventilation groove is effectively suppressed.

  The building ventilation structure according to claim 3 is the building ventilation structure according to claim 2, wherein an upper end portion of the outer wall is thinned with respect to a general portion, and a distal end of the bent portion is thinned. It is arranged within the range of the step formed by.

  In the building ventilation structure according to the third aspect, since the upper end portion of the outer wall is thinner than the general portion, the upper end portion is formed with a step corresponding to the thinner portion.

  Here, the tip of the bent portion is arranged within the range of the step formed by thinning. Thereby, since the ventilation inlet / outlet is arranged in the step, the ventilation inlet / outlet is arranged at a position recessed with respect to the outer surface of the outer wall. For this reason, the intrusion of rainwater into the ventilation inlet / outlet is suppressed.

  The building ventilation structure according to claim 4 is the building ventilation structure according to claim 3, wherein the deepest portion of the ventilation groove is disposed outside the outer wall.

  In the building ventilation structure according to claim 4, since the deepest portion of the ventilation groove is disposed outside the outer wall, the portion other than the ventilation groove on the ventilation trunk edge overlaps the ventilation inlet / outlet in a plan view. Arranged. That is, the ventilation groove is not disposed directly above the ventilation inlet / outlet. For this reason, the intrusion of rainwater from the ventilation inlet / outlet to the ventilation groove is further suppressed.

  The building ventilation structure according to claim 5 is the building ventilation structure according to any one of claims 2 to 4, further comprising a draining portion provided above the ventilation entrance.

  In the building ventilation structure according to the fifth aspect, since the drainage portion is provided above the ventilation inlet / outlet, entry of rainwater from the ventilation inlet / outlet to the ventilation groove is further suppressed.

  The building ventilation structure according to claim 6 is the building ventilation structure according to any one of claims 1 to 5, wherein a waterproof tape is interposed between the outer wall and the ventilation trunk edge. Has been.

  In the building ventilation structure according to claim 6, since the waterproof tape is interposed between the outer wall and the ventilation trunk edge, the rain water that has risen toward the ventilation trunk edge side along the outer surface of the outer wall is The water is stopped by.

  A building ventilation structure according to a seventh aspect is the building ventilation structure according to any one of the first to sixth aspects, wherein the eave ridge is attached to a tip of a land roof constituting a roof.

  In the ventilation structure of the building according to claim 7, since the eaves is attached to the tip of the flat roof, the eaves can be arranged without impairing the design performance.

  The building ventilation structure according to claim 8 is the building ventilation structure according to any one of claims 1 to 7, wherein the ventilation structure is provided on one end side of the ventilation groove, and the ventilation groove can be opened and closed. An opening / closing mechanism configured to close the ventilation groove when a water amount equal to or greater than a reference value is detected is provided.

  In the building ventilation structure according to claim 8, an opening / closing mechanism is provided on one end side of the ventilation groove, and the opening / closing mechanism is configured to be able to open / close the ventilation groove. Further, when water exceeding the reference value is detected, the ventilation groove is closed by the opening / closing mechanism. Thereby, since a ventilation groove can be opened and closed according to the amount of rainwater, an attic is ventilated efficiently.

  According to the building ventilation structure of the first aspect, the ventilation trunk edge can be efficiently provided.

  According to the ventilation structure for a building according to claim 2, it is possible to suppress the intrusion of rainwater from the ventilation entrance to the ventilation groove.

  According to the ventilation structure of a building according to claim 3, it is possible to suppress the intrusion of rainwater into the ventilation entrance.

  According to the ventilation structure for a building according to the fourth aspect, it is possible to further suppress the intrusion of rainwater from the ventilation entrance to the ventilation groove.

  According to the ventilation structure for a building according to claim 5, it is possible to further suppress the intrusion of rainwater from the ventilation inlet / outlet into the ventilation groove.

  According to the ventilation structure for a building according to the sixth aspect, the rain water that has risen toward the ventilation trunk edge along the outer surface of the outer wall can be stopped by the waterproof tape.

  According to the ventilation structure of the building according to claim 7, the eaves can be arranged without impairing the design performance.

  According to the building ventilation structure of the eighth aspect, the attic can be efficiently ventilated.

It is a longitudinal cross-sectional view which shows a part of unit building to which the ventilation structure of the building which concerns on the 1st Embodiment of this invention was applied. It is the longitudinal cross-sectional view which decomposed | disassembled a part of unit building shown by FIG. FIG. 2 is a partially broken perspective view showing a state in which a ventilation trunk edge used in the unit building shown in FIG. 1 is attached to an outer wall material via a waterproof tape. It is a longitudinal cross-sectional view which shows a part of unit building to which the ventilation structure of the building which concerns on the 2nd Embodiment of this invention was applied. It is a longitudinal cross-sectional view which shows a part of unit building to which the ventilation structure of the building which concerns on the 3rd Embodiment of this invention was applied. It is a longitudinal cross-sectional view which shows a part of unit building to which the ventilation structure of the building which concerns on the 4th Embodiment of this invention was applied. FIG. 2 is a partially broken perspective view showing a state in which a ventilation trunk edge used in the unit building shown in FIG. 1 is attached to an outer wall material via a waterproof tape.

  (First embodiment)

  FIG. 1 is a longitudinal sectional view showing a part of a unit building 10 to which the building ventilation structure S1 according to the first embodiment of the present invention is applied. FIG. It is shown in the longitudinal cross-sectional view which decomposed | disassembled one part. In addition, the arrow X direction shown suitably in these drawings indicates the girder direction of the unit building 10, the arrow Y direction indicates the wife direction, and the arrow Z direction indicates upward.

  As shown in these drawings, the unit building 10 has a wall frame 12. The wall frame 12 extends along the vertical direction and is arranged at predetermined intervals in the Y direction. The wall frame 12 is formed in a substantially U-shaped cross section when viewed from above, and is opened on the opposite side to the arrow Y direction. Further, an outer wall member 40 described later is fastened to the outside of the wall frame 12 (opposite to the X direction) by a fastening member such as a screw.

  A horizontal rail 14 is stretched over the upper end of the wall frame 12 along the Y direction, and the horizontal rail 14 is fixed to an outer wall member 40 described later by a tapping screw 78. A vent hole 16A is formed through the bottom wall 16 constituting the lower part of the horizontal rail 14 between the adjacent wall frames 12. Thereby, the space above the horizontal rail 14 and the space below the horizontal rail 14 are communicated with each other through the vent hole 16A.

  A ceiling beam 18 is provided on the inner side (X direction side) of the wall frame 12. The ceiling beam 18 is fastened to the horizontal beam 14 by a fastening member such as a bolt (not shown). A support portion 18A is formed on the top of the ceiling beam 18, and the support portion 18A is bent in the X direction. A ceiling (not shown) is fixed to the lower part of the ceiling beam 18.

  A roof frame 20 is extended inside the ceiling beam 18. A fastening portion 20A is provided at an outer end portion of the roof frame 20, and the fastening portion 20A is disposed above the support portion 18A of the ceiling beam 18 and is supported by a fastening member such as a bolt (not shown). It is concluded to. Thus, an attic 22 is formed below the roof frame 20, and the attic 22 communicates with the space above the horizontal beam 14 through the vent holes 16 </ b> A of the horizontal beam 14.

  Above the roof frame 20, a land roof 24 constituting the roof of the unit building 10 is provided. The flat roof 24 includes a field plate 26, a heat insulating material 28, and a steel plate accessory 30. The field plate 26 is formed of plywood, ALC (lightweight concrete) or the like, and is installed on the roof frame 20. Moreover, the outer side edge part of the field plate 26 is spaced apart and arrange | positioned above the horizontal beam 14 mentioned above, and the clearance gap is provided between the field plate 26 and the horizontal beam 14 by this.

  The heat insulating material 28 is installed on the base plate 26. The heat insulating material 28 is formed of a foamable resin such as polystyrene foam and has a function of suppressing dew condensation indoors.

  The steel plate accessory 30 is formed of a DN steel plate and is installed on the heat insulating material 28. A side wall portion 30 </ b> A is integrally provided at an outer end portion of the steel plate accessory 30, and the side wall portion 30 </ b> A is bent downward and is disposed in parallel to the outside of the wall frame 12 and the horizontal rail 14. . Further, the lower end portion of the side wall portion 30A is folded back so as to overlap the side rail 14 side.

  Next, the ventilation structure S1 of a building which is a main part of the present invention will be described. This building ventilation structure S1 has an outer wall material 40 as an outer wall, a ventilation trunk edge 50, an outer drainer 60, and an eaves bowl 70.

  The outer wall member 40 is disposed on the outer side (opposite to the arrow X direction) of the wall frame 12 described above, and is fixed to the wall frame 12 by a fastening member such as a screw (not shown). The upper end of the outer wall material 40 is spaced apart from the above-described field plate 26, and a gap is provided between the upper end of the outer wall material 40 and the field plate 26. Thereby, the space above the outer wall member 40 and the attic 22 are communicated with each other through the vent hole 16 </ b> A of the cross rail 14.

  As shown in FIG. 3, the upper end portion of the outer wall member 40 is thinner than the general portion of the outer wall member 40, and thereby the design surface of the general portion (described later) is formed on the upper end portion of the outer wall member 40. A step that is recessed toward the indoor side (arrow X direction side) with respect to the outer side surface 44) is formed. Hereinafter, the portion where the step is formed is referred to as “recess 42”. The recess 42 includes an attachment surface 42A that is parallel to the outer surface 44 of the general part of the outer wall member 40, and an inclined surface 42B that connects the lower end of the attachment surface 42A and the outer surface 44 of the general part. The inclined surface 42B is disposed so as to be inclined downward toward the outer side between the attachment surface 42A and the outer surface 44, and connects the attachment surface 42A and the outer surface 44. Thereby, the upper part of the outer wall material 40 is set to have a smaller thickness dimension (dimension in the X direction) than other parts. In the recess 42, a ventilation trunk edge 50, which will be described later, is arranged, and the ventilation trunk edge 50 is configured to be attached to the upper portion of the outer wall member 40.

  The ventilator rim 50 is made of resin and is disposed between the side wall portion 30 </ b> A of the steel plate accessory 30 and the mounting surface 42 </ b> A of the outer wall member 40. The ventilator edge 50 is attached to the attachment surface 42A via a waterproof tape 48 (see FIG. 3), and is fixed to the outer wall member 40 by a tapping screw 78 together with an eaves bowl 70 and an external drainer 60 described later.

  A ventilation groove 52 is provided along the vertical direction on the outer side of the ventilation trunk edge 50 (the portion on the side wall portion 30A side of the steel plate accessory 30). The ventilation groove 52 is formed in a substantially semicircular shape in plan view, and is opened to the side wall portion 30A. Thereby, the space above the ventilator rim 50 and the space below the ventilator rim 50 are communicated by the vent groove 52. Further, the deepest portion 54 (the deepest portion in the X direction) of the ventilation groove 52 is disposed outside the outer surface 44 of the outer wall member 40 in plan view.

  The external drainer 60 is formed of a plate material such as aluminum, and is disposed outside the side wall portion 30 </ b> A of the steel plate accessory 30. The outer drainer 60 has a shielding part 62 extending in the vertical direction, and the shielding part 62 is fixed to the upper part of the outer wall member 40 by a tapping screw 78 together with an eaves bowl 70 described later. The shielding portion 62 extends in the vertical direction so as to shield a part of the side wall portion 30A and the ventilator edge 50 from the outside, and is bent toward the concave portion 42 side of the outer wall material 40 at the lower end portion. ing. The lower end portion is a bent portion 64, and the bent portion 64 is arranged in a direction orthogonal to the vertical direction. Thereby, the space below the ventilator rim 50 is shielded from the outside by the shield 62.

  The distal end portion of the bent portion 64 is formed so as to be overlapped on the upper side. Further, a gap is provided between the tip of the bent portion 64 and the mounting surface 42 </ b> A of the concave portion 42, and this gap portion serves as a ventilation inlet / outlet port 80. Accordingly, the ventilation inlet / outlet port 80 is disposed adjacent to the outer wall member 40 and is disposed at a position recessed with respect to the outer surface 44 of the outer wall member 40. The outside and the space below the ventilation trunk edge 50 are communicated with each other through the ventilation inlet / outlet 80. As a result, as shown by the arrows in FIG. 1, a ventilation path 82 is formed from the ventilation inlet / outlet port 80 to the ventilation groove 52, the space above the outer wall member 40, and the attic 22 through the ventilation holes 16 </ b> A of the horizontal rail 14. Yes.

  Further, the distal end of the bent portion 64 of the external drainer 60 is disposed slightly inside the outer surface 44 of the outer wall member 40 (the bent portion 64 and the outer surface 44 of the outer wall member 40 overlap in plan view). Arranged). Thus, the ventilation inlet / outlet port 80 is disposed in the recess 42, and a portion other than the ventilation groove 52 of the ventilation trunk edge 50 is disposed immediately above the ventilation inlet / outlet port 80.

  Further, an outer draining portion 66 is provided at the upper part of the outer draining 60. The outer draining portion 66 is inclined downward from the upper end of the shielding portion 62 toward the outer side, and the tip of the outer draining portion 66 is bent downward. Thereby, the rain water on the land roof 24 flows down to the eaves wall 70 mentioned later via the outer side draining part 66. FIG.

  The eaves bowl 70 is provided outside the shielding part 62 of the external drainer 60. An attachment portion 72 is provided in a portion of the eaves 70 on the shielding portion 62 side, and a through hole (not shown) is formed in the attachment portion 72. A tapping screw 78 is inserted into the through hole, and the eaves bowl 70 is inserted by the tapping screw 78 with the external drainer 60, the side wall 30 </ b> A of the steel plate accessory 30, and the ventilation trunk edge 50 interposed therebetween. The outer wall member 40 is fixed to the upper part.

  The eaves 70 is formed in a substantially U shape when viewed from the direction of the arrow Y, and is opened upward. In addition, the eaves bowl 70 has a flow path 74 at the lower portion, and the flow path 74 is inclined downward toward one side in the arrow Y direction. Thereby, the rain water flowing down from the outer draining portion 66 of the outer draining 60 is configured to flow downward through the eaves 70.

  Next, the operation and effect of the present embodiment will be described.

  In the unit building 10 to which the ventilation structure S1 of the building is applied, the roof is constituted by the land roof 24, and the ventilation inlet / outlet port 80 of the ventilation path 82 is provided in the recess 42 of the outer wall member 40. A ventilation trunk edge 50 is provided above the ventilation inlet / outlet 80, and a ventilation groove 52 is formed in the ventilation trunk edge 50. Thereby, in the unit building 10 having the land roof 24, the ventilation path 82 is formed along the outer wall material 40, and the attic 22 is ventilated by the ventilation path 82. Therefore, heat retention in the attic 22 can be suppressed, and condensation in the attic 22 can be suppressed.

  Here, the ventilator edge 50 is provided between the mounting surface 42A of the outer wall member 40 and the side wall part 30A of the steel plate accessory 30, and the eaves rod 70 is tapped with the ventilator edge 50 interposed therebetween. The outer wall material 40 is fastened (fixed) by screws 78. For this reason, the eaves rod 70 is integrally supported by the outer wall material 40 together with the ventilator edge 50 without using a plate for attaching the eaves rod 70 as in the conventional eaves tip structure. In addition, when the eaves bowl 70 is fixed to the outer wall material 40, the ventilator edge 50 functions as a base material, so that the eaves bowl 70 can be stably fixed to the outer wall material 40. Thereby, the eaves bowl 70 can be stably fixed to the outer wall material 40 using the ventilation trunk edge 50 having a ventilation function. Therefore, the ventilator rim 50 can be provided efficiently.

  A ventilation groove 52 is provided on the outer side of the ventilation trunk edge 50, and a ventilation inlet / outlet port 80 is provided adjacent to the outer wall member 40. For this reason, the ventilation inlet / outlet port 80 and the ventilation groove 52 are arranged so as to be shifted in the thickness direction (X direction) of the ventilation trunk edge 50 in plan view. As a result, the ventilation path has a labyrinth structure, and the intrusion of rainwater from the ventilation inlet / outlet port 80 to the ventilation groove 52 can be effectively suppressed.

  Furthermore, a concave portion 42 is provided at the upper end portion of the outer wall member 40, and the distal end of the bent portion 64 of the external drainer 60 is disposed in the concave portion 42. Thereby, since the ventilation inlet / outlet port 80 is arranged in the recess 42, the ventilation inlet / outlet port 80 is arranged at a position recessed with respect to the outer surface 44 of the outer wall member 40. For this reason, the intrusion of rainwater into the ventilation port 80 can be suppressed.

  In addition, by arranging the ventilator edge 50 in the recess 42, there is also an advantage that the protruding amount of the ventilator edge 50 with respect to the outer wall material 40 when the ventilator edge 50 is attached to the outer wall material 40 can be suppressed.

  Further, the deepest portion 54 of the ventilation groove 52 is disposed outside the outer wall member 40. For this reason, in a plan view, the portion other than the ventilation groove 52 of the ventilation trunk edge 50 and the ventilation inlet / outlet port 80 are overlapped. That is, the ventilation groove 52 is not disposed directly above the ventilation inlet / outlet port 80. For this reason, it is possible to further suppress the intrusion of rainwater from the ventilation inlet / outlet port 80 into the ventilation groove 52.

  The ventilator edge 50 is attached to the upper portion of the outer wall member 40 via a waterproof tape 48. For this reason, rainwater that has risen toward the ventilator edge 50 along the outer surface 44, the inclined surface 42 </ b> B, and the attachment surface 42 </ b> A of the outer wall member 40 is stopped by the waterproof tape 48. Thereby, the penetration | invasion to the attic 22 side of rainwater can be suppressed further.

  Further, the eaves 70 is attached to the tip (outer end) of the land roof 24. For this reason, the eaves bowl 70 can be arrange | positioned, without impairing design performance.

(Second Embodiment)

  FIG. 4 shows a part of a unit building 100 to which the building ventilation structure S2 according to the second embodiment is applied in a longitudinal sectional view. In addition, the arrow X direction shown in this figure shows the girder direction of the unit building 100, the arrow Y direction shows the wife direction, and the arrow Z direction shows upward. Further, in FIG. 4, the ceiling beam 18, the eaves wall 70, and the tapping screw 78 are not illustrated.

  The building ventilation structure S2 according to the second embodiment has substantially the same configuration as the building ventilation structure S1 according to the first embodiment, but differs in the following points.

  In the building ventilation structure S2, an internal drainer 110 is provided instead of the waterproof tape 48 used in the building ventilation structure S1. The internal drainer 110 is formed of a plate material such as aluminum. The internal drainer 110 has a main body 112, and the main body 112 is sandwiched between the ventilator edge 50 and the attachment surface 42 </ b> A of the outer wall member 40. A lower drainage portion 114 as a drainage portion is integrally provided at a lower portion of the inner drainage 110, and the lower drainage portion 114 is inclined downward from the lower end of the main body portion 112 toward the outside. Further, the lower drainage portion 114 is disposed below the ventilation trunk edge 50 and is disposed immediately above the ventilation inlet / outlet port 80. Furthermore, the front end portion of the lower drainage portion 114 is folded back so as to overlap the ventilation inlet / outlet 80 side, and the upper surface of the lower drainage portion 114 is formed without a step.

  An upper drainage portion 116 is integrally provided on the upper portion of the inner drainage 110, and the upper drainage portion 116 is inclined upward from the upper end of the main body portion 112 toward the outside. Further, the upper drainage portion 116 is disposed above the ventilator rim 50, the tip of the upper drainage portion 116 is folded back so as to overlap the upper side, and the lower surface of the upper drainage portion 116 is formed without a step. Yes. Furthermore, the tips of the upper drainage 116 and the lower drainage 114 are arranged at the same position in plan view.

  Further, the deepest portion 54 of the ventilation groove 52 of the ventilation trunk edge 50 is disposed on the inner side (X direction side) with respect to the tips of the upper drainage portion 116 and the lower drainage portion 114 in a plan view.

  As described above, also in the second embodiment, the attic 22 is formed by the ventilation path 82 from the ventilation inlet / outlet port 80 to the ventilation groove 52, the space above the outer wall member 40, and the attic 22 via the ventilation holes 16 </ b> A of the cross rail 14. Since it is ventilated, the same operations and effects as the first embodiment are achieved.

  In addition, since the lower drainage portion 114 of the inner drainer 110 is disposed directly above the vent inlet / outlet 80, the lower drainage portion 114 further infiltrates rainwater from the vent inlet / outlet port 80 to the vent groove 52 side. Can be suppressed.

  Furthermore, if rainwater enters the ventilation groove 52 side, the rainwater is blocked by the upper drainage portion 116, so that it is possible to suppress the rainwater from entering above the outer wall member 40. Moreover, since the lower drainage portion 114 is inclined downward toward the outside, rainwater that has entered the ventilation groove 52 side can easily flow downward along the lower drainage portion 114. Thereby, this rainwater can be easily drained from the ventilation port 80.

  Moreover, since the front-end | tip part of the lower side drainage part 114 is turned back so that it may overlap with the ventilation inlet / outlet 80 side, the upper surface of the lower side drainage part 114 is formed without a level | step difference. For this reason, when rainwater that has entered the ventilation groove 52 flows down along the upper surface of the lower drainage portion 114, the rainwater can be prevented from collecting on the upper surface of the lower drainage portion 114.

(Third embodiment)

  FIG. 5 is a longitudinal sectional view showing a part of a unit building 200 to which the building ventilation structure S3 according to the third embodiment is applied. In addition, the arrow X direction shown in this figure shows the girder direction of the unit building 200, the arrow Y direction shows the wife direction, and the arrow Z direction shows upward. Further, in FIG. 5, the ceiling beam 18, the eaves wall 70, and the tapping screw 78 are not illustrated.

  The building ventilation structure S3 according to the third embodiment has substantially the same configuration as the building ventilation structure S2 according to the second embodiment, but differs in the following points.

  In the building ventilation structure S3, the lower drainage portion 114 of the inner drainage 110 is composed of an inclined portion 114A and an extending portion 114B, and is formed in a substantially inverted L shape. The inclined portion 114A extends downwardly from the lower end of the main body 112 toward the outside, and the extending portion 114B extends downward from the tip of the inclined portion 114A. The distal end portion of the extending portion 114B is folded back so as to overlap the outer wall material 40 side, and the outer surface of the extending portion 114B is formed without a step. In addition, the extending portion 114B is disposed immediately above the bent portion 64 of the external drainer 60, whereby the ventilation path from the ventilation inlet / outlet port 80 to the ventilation groove 52 is formed in a substantially crank shape when viewed from the Y direction. ing.

  Further, the upper drainage portion 116 of the inner drainage 110 is inclined downward toward the outside, and the tip of the upper drainage portion 116 and the extending portion 114B of the lower drainage portion 114 are at the same position in plan view. Has been placed.

  Further, the deepest portion 54 of the ventilation groove 52 of the ventilation trunk edge 50 is disposed on the inner side (X direction side) with respect to the tip of the upper drainage portion 116 and the extending portion 114B of the lower drainage portion 114 in plan view. Yes.

  As described above, also in the third embodiment, the attic 22 is formed by the ventilation path 82 from the ventilation inlet / outlet port 80 to the ventilation groove 52, the space above the outer wall member 40, and the attic 22 via the ventilation holes 16 </ b> A of the cross rail 14. Since it is ventilated, the same operations and effects as the second embodiment are achieved.

  Moreover, since the ventilation path 82 from the ventilation inlet / outlet 80 to the ventilation groove 52 is formed in a crank shape when viewed from the Y direction, it is possible to effectively suppress the intrusion of rainwater from the ventilation inlet / outlet 80 to the ventilation groove 52 side.

  Further, the upper drainage portion 116 of the inner drainage 110 is inclined downward toward the outside, and the tip of the upper drainage portion 116 is disposed outside the deepest portion 54 of the ventilation groove 52 of the ventilation trunk edge 50. ing. For this reason, if rainwater enters the ventilation groove 52 side, the rainwater is blocked by the upper drainage portion 116 and the rainwater is prevented from entering the outer wall member 40 and the rainwater is prevented from flowing upward. It flows down along the part 116. Thereby, this rain water can flow down to the ventilation groove 52 side.

  In addition, since the inclined portion 114A of the lower drainage portion 114 is inclined downward toward the outside, rainwater that has entered the ventilation groove 52 side flows down along the inclined portion 114A. For this reason, this rainwater can be easily drained from the ventilation port 80. Furthermore, the front end portion of the extending portion 114B of the lower drainage portion 114 is folded back so as to overlap the outer wall material 40 side, and the outer surface of the extending portion 114B is formed without a step. For this reason, it can also be suppressed that the rain water which flowed down along inclination part 114A of the lower side drainage part 114 accumulates on the outer surface of the extension part 114B.

  Although the waterproof tape 48 is omitted in the second embodiment and the third embodiment, the waterproof tape 48 may be provided between the inner drainer 110 and the mounting surface 42A of the outer wall member 40. .

(Fourth embodiment)

  In FIG. 6, a part of a unit building 300 to which the building ventilation structure S <b> 4 according to the fourth embodiment is applied is shown in a longitudinal sectional view. In addition, the arrow X direction shown in this figure shows the girder direction of the unit building 300, the arrow Y direction shows the wife direction, and the arrow Z direction shows upward. In FIG. 6, the ceiling beam 18, the eaves wall 70, and the tapping screw 78 are not shown.

  The building ventilation structure S4 according to the fourth embodiment has substantially the same configuration as the building ventilation structure S1 according to the first embodiment, but differs in the following respects.

  The ventilation structure S4 of the building includes an opening / closing mechanism 310. The opening / closing mechanism 310 includes a shutter 312, a rainwater detection sensor 314, and a control unit 316.

  The shutter 312 is disposed on the lower end side (one end side) of the ventilation groove 52 of the ventilation trunk edge 50 and is rotatably attached to the outer wall member 40. The shutter 312 is connected to an actuator such as a solenoid (not shown), and is driven to open (position indicated by a solid line in FIG. 6) and closed position (position indicated by a two-dot chain line in FIG. 6). It is comprised so that rotation is possible. Specifically, when the actuator is turned off, the shutter 312 is disposed at the open position, and the ventilation groove 52 is opened. On the other hand, when the actuator is turned on, the shutter 312 is disposed at the closed position, and the ventilation groove 52 is closed.

  The rainwater detection sensor 314 is disposed below the ventilation groove 52 of the ventilation trunk edge 50, and is fixed to the side wall portion 30 </ b> A of the steel plate accessory 30. The rainwater detection sensor 314 is configured to be able to detect the amount of rainwater that has entered the ventilation groove 52 side from the ventilation inlet / outlet port 80.

  The control unit 316 is electrically connected to the actuator and the rainwater detection sensor 314 described above. The control unit 316 controls ON / OFF of the actuator based on the detection signal output from the rainwater detection sensor 314. Specifically, based on the detection signal from the rainwater detection sensor 314, when the control unit 316 determines that the rainwater that has entered from the ventilation inlet / outlet 80 is equal to or higher than the reference value, the control unit 316 turns on the actuator. It is configured. On the other hand, when the control unit 316 determines that the rainwater that has entered from the ventilation port 80 is less than the reference value, the control unit 316 is configured to turn off the actuator.

  Thus, when the shutter 312 is disposed at the open position, the ventilation path 82 from the ventilation inlet / outlet port 80 to the attic 22 via the ventilation groove 52, the space above the outer wall member 40, and the ventilation hole 16 </ b> A of the lateral rail 14. Thus, the attic 22 is ventilated, so that the fourth embodiment has the same operations and effects as the first embodiment.

  Further, when the control unit 316 determines that the rainwater that has entered from the ventilation inlet / outlet 80 is equal to or higher than the reference value based on the detection signal from the rainwater detection sensor 314, the control unit 316 turns on the actuator to turn the shutter 312 on. It is turned to the closed position. Thereby, since the ventilation groove | channel 52 can be opened and closed according to the amount of rain water which permeated from the ventilation inlet / outlet 80, the attic 22 can be ventilated efficiently.

  In the fourth embodiment, the rainwater detection sensor 314 is disposed below the ventilation groove 52, but the position of the rainwater detection sensor 314 can be arbitrarily set. For example, the rainwater detection sensor 314 may be disposed at the upper end of the outer wall member 40.

  In the fourth embodiment, the shutter 312 is arranged on the lower end side of the ventilation groove 52 of the ventilation cylinder edge 50, but the shutter 312 may be arranged above the ventilation cylinder edge 50.

  Furthermore, in the fourth embodiment, the rainwater detection sensor 314 detects rainwater that has entered from the ventilation port 80. Instead of this, a wind speed detection sensor capable of detecting the wind speed may be provided on the outer wall member 40. Thereby, the attic 22 can be ventilated according to the outdoor wind speed. In this case, the rainwater detection sensor 314 and the wind speed detection sensor may be provided in combination.

  In the first to fourth embodiments, the ventilation groove 52 of the ventilation trunk edge 50 is formed along the vertical direction. Alternatively, as shown in FIG. 7, the ventilation groove 52 may be formed in a crank shape when viewed from the X direction. Further, the ventilation groove 52 may be formed so as to be inclined in the Y direction as it goes upward. Thereby, it is possible to further suppress the intrusion of rainwater above the ventilation trunk edge 50 via the ventilation groove 52.

  Furthermore, in the first to fourth embodiments, the shielding part 62 is provided on the external drainer 60. Instead of this, the side wall portion 30A of the steel plate accessory 30 may be configured as a shielding portion of the present invention. In this case, a portion corresponding to the bent portion 64 of the shielding portion 62 is provided on the side wall portion 30A. However, since it is generally difficult to bend the DN steel plate twice, when the portion corresponding to the bent portion 64 of the external drainer 60 is provided on the side wall portion 30A, the side wall portion 30A is a separate member from the steel plate accessory 30. And may be formed integrally with the steel plate accessory 30 by welding or the like.

  Further, in the first to fourth embodiments, the recess 42 is formed on the outdoor side of the upper end portion of the outer wall member 40, and the ventilation trunk edge 50 is disposed in the recess 42. Alternatively, the ventilator edge 50 may be attached to the outdoor side of the upper end portion of the outer wall member 40 without providing the recess 42 in the outer wall member 40.

  However, in consideration of the fact that the recess 42 formed in the upper end portion of the outer wall member 40 is an element originally formed in the outer wall member 40, it is preferable to employ the above-described embodiment that effectively uses the recess 42.

  Furthermore, in 1st Embodiment-4th Embodiment, the inclined surface 42B of the outer wall material 40 is inclined and arrange | positioned below as it goes outside. Instead, the inclined surface 42B may be arranged in a direction orthogonal to the vertical direction. Thereby, since the bending part 64 and the inclined surface 42B of the external drainer 60 are arrange | positioned in parallel, invasion of rain water to the ventilation inlet / outlet port 80 can be suppressed further.

  In the first to fourth embodiments, the tip of the bent portion 64 of the external drainer 60 is disposed in the recess 42, but the tip of the bent portion 64 is used as the outer surface 44 of the outer wall member 40. You may arrange | position outside.

  Furthermore, in the first embodiment and the fourth embodiment, the ventilator edge 50 is attached to the upper part of the outer wall member 40 via the waterproof tape 48. Instead of this, the waterproof tape 48 may be omitted.

  Further, in the first to fourth embodiments, the building ventilation structures S1 to S4 are applied to the unit buildings 10, 100, 200, and 300 having the land roof 24, but the building ventilation structure S1. S4 may be applied to a building having a roof structure without eaves.

22 Attic 24 Flat roof 40 Outer wall material (outer wall)
42 Concave portion 48 Waterproof tape 50 Vent trunk edge 52 Vent groove 54 Deepest portion 62 Shield portion 64 Bent portion 70 Eaves 80 Vent inlet / outlet port 114 Lower drainage portion (drainage portion)
310 Opening / closing mechanism S1 Ventilation structure of building S2 Ventilation structure of building S3 Ventilation structure of building S4 Ventilation structure of building

Claims (8)

A ventilator rim that is attached to the outside of the upper part of the outer wall and has a ventilation groove formed between the attic and the outside;
An eaves bowl provided on the outside of the ventilator rim, and fixed to the outer wall with the ventilator rim interposed therebetween;
Ventilation structure of the building with A bent portion provided between the ventilator rim and the eaves ridge to shield the ventilator rim from the outside and bent to the outer wall side below the ventilator rim; A shielding part that forms a ventilation port between the tip and the outer wall;
The ventilation structure of a building according to claim 1, wherein the ventilation groove is provided on an outer side of the ventilation trunk edge. The upper end of the outer wall is thinner than the general part,
The ventilation structure of a building according to claim 2, wherein a tip of the bent portion is disposed within a range of a step formed by the thinning.   The building ventilation structure according to claim 3, wherein a deepest portion of the ventilation groove is disposed outside the outer wall.   The building ventilating structure according to any one of claims 2 to 4, further comprising a drainage portion provided above the vent doorway.   The ventilation structure of the building according to any one of claims 1 to 5, wherein a waterproof tape is interposed between the outer wall and the ventilation trunk edge.   The building ventilation structure according to any one of claims 1 to 6, wherein the eaves ridge is attached to a tip of a land roof constituting the roof.   8. The device according to claim 1, further comprising an opening / closing mechanism that is provided on one end side of the ventilation groove and configured to be able to open and close the ventilation groove, and closes the ventilation groove when a water amount equal to or greater than a reference value is detected. 2. A ventilation structure of a building according to item 1.

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