JP5887452B1 - Water return structure and ventilation ridge structure using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make it possible to install a ventilation wing even in a corner ridge where roof materials are installed in a staircase shape and to exhibit a waterproof function against the intrusion of rainwater from the side unique to the corner ridge Provide the structure of the corner building. SOLUTION: A ventilation structure 10 includes a pair of water return structures 1 attached to a pair of roof members 35 that are installed at predetermined intervals along the corner ridge 53 with the ends thereof as ventilation spaces, and a roof. A pair of base materials 8 installed on a part of the upper surface of the base 28 and engaged with the water return structure 1, and a corner ridge so as to be placed on the pair of water return structures 1 and the pair of base materials 8. It is mainly composed of a ventilation building 11 installed at 53. The water return structure 1 is disposed above the lower plate 5, a part of which is disposed on the lower surface of the roof material 35 on one end side in the direction of the corner building 53, and above the lower plate 5. An upper plate 2 on which a part is placed, and a standing plate 4 connected to the lower plate 5 and the upper plate 2 in a watertight state are provided. [Selection] Figure 2

Description

  TECHNICAL FIELD The present invention relates to a water return structure and a ventilation building structure using the same, and in particular, a water return structure used for installing a ventilation building in a corner building for the purpose of natural ventilation of a back space in a corner building portion of a house. The present invention relates to a body and a ventilation building structure using the same.

  Conventionally, there is a ventilation building installed in a horizontal large building for natural ventilation of the attic space in the house.

  FIG. 6 is a schematic perspective view showing the external shape of a house where a conventional ventilation building is installed, particularly around the roof.

  Referring to the figure, a ventilation building 55 is installed in the horizontal large building 51 of the house 50 which is a dormitory roof, and ventilates the raised air in the large building in the shed space.

  FIG. 7 is a schematic end view of the VII-VII line shown in FIG. 6, and shows a cross-sectional structure of a conventional ventilation building disclosed in Patent Document 1.

  Referring to the figure, the ventilation building 55 is installed on a pair of roof materials 35a and 35b and a pair of roof bases 28a and 28b having a substantially mountain shape and an opening at the center thereof. The ventilation building cover 15 is formed mainly by pressing a steel plate, and a pair of ventilation members 39a and 39b attached to the lower surface of the ventilation building cover 15.

  First, the ventilation building cover 15 is connected to a pair of plate-shaped inclined portions 17a and 17b extending obliquely downward from the apex 16 in the width direction, and lower ends of the inclined portions 17a and 17b, and is substantially vertically downward. And a pair of flange portions 19a, 19b that are connected to the lower end portions of the vertical portions 18a, 18b and extend outward in parallel with the inclined portions 17a, 17b. ing. Each of the inclined portions 17a and 17b is formed with a plurality of rows of ventilation ports 14 extending parallel to the longitudinal direction. And the heat insulating material 20 is attached to the space between the ventilation ports 14 adjacent to the apex 16 on the lower surface of the inclined portions 17a and 17b, and a pair of ventilations is provided on a part of the lower surface of the heat insulating material 20. Members 39a and 39b are attached. In addition, since the dew condensation from the main body cover 15 is prevented by the heat insulating material 20, the drop of water droplets to the shed space through the central portion between the roof materials 35a and 35b of the ventilation building 55 is prevented.

  Next, the ventilation member 39 has a trapezoidal shape in cross section in the width direction, and has a rod shape having substantially the same length as the length of each of the inclined portions 17a and 17b in the longitudinal direction. Yes. Specifically, the ventilation member 39 is connected and integrated with each other by heat fusion at the time of cutting in a state where a plurality of synthetic resin sheets each having an uneven cross-sectional shape are stacked. A large number of vent holes penetrating from one side wall to the other side wall are formed. With this structure, the ventilation member 39 exhibits a ventilation function and a waterproof function that allow ventilation through the ventilation hole and prevent rainwater from entering through the ventilation hole.

  As described above, this ventilation building integrates the ventilation building cover and the ventilation member, and exhibits a ventilation function and a waterproof function.

  In the ventilation state, as shown by the arrows, the air rising from between the drains 33a and 33b at the center between the roof materials 35a and 35b passes through the ventilation holes of the ventilation members 39a and 39b. Pass from the inner side to the outer side. The passed air is discharged outward through a plurality of ventilation ports 14 formed in each of the inclined portions 17a and 17b.

  On the other hand, rainwater from above enters mainly below the inclined portions 17a and 17b through each of the plurality of ventilation openings 14. As described above, the infiltrated rainwater cannot move inward through the vent holes of the ventilation members 39a and 39b. Accordingly, the rainwater that has entered enters the outside from the gaps between the lower surfaces of the flange portions 19a and 19b and the upper surfaces of the roof members 35a and 35b.

  Further, since there is almost no gap between the lower surface of each of the ventilation members 39a and 39b and the upper surface of the roofing materials 35a and 35b, there is no risk of rainwater entering from that portion. Even if rainwater enters from this gap, the amount of the rainwater is very small, and the rainwater is reliably prevented from entering inward by the drains 33a and 33b and the waterproof paper 30a and 30b shown in FIG. Will be.

  Furthermore, since the ventilation building 55 is installed in a horizontal large building, there is no possibility of rainwater entering from the width direction of the ventilation building 55. This will be described.

  FIG. 8 is a schematic cross-sectional view of the line VIII-VIII shown in FIG. 7 and shows a state in which the cross section of the ventilation building, the roof material, and the roof base is viewed from the width direction of the ventilation building.

  Referring to the figure, there is almost no gap between the lower surface of the ventilation building 55 and the upper surface of the roofing material 35, and most of the rainwater from the sky flows down along the upper surface of the roofing material 35 toward the lower side of the roof (not shown). There is no risk of entering the inside of the ventilation building 55 installed in the horizontal large building.

  Next, attachment of the ventilation building shown in FIG. 7 will be described.

  FIG. 9 is a schematic end view showing a state before the ventilation building shown in FIG. 7 is attached to the roofing material.

  Referring to the drawing, the pair of roof bases 28a and 28b and the pair of roof materials 35a and 35b have a substantially mountain shape and have a shape in which a central portion is opened. Specifically, the roof bases 28a and 28b are a pair of field boards 29a and 29b installed on a rafter (not shown), and a pair of waterproof papers 30a and 30b installed on the upper surfaces of the field boards 29a and 29b. It consists of and. The roofing materials 35a and 35b include a pair of lower roofing materials 32a and 32b installed on each of the waterproof papers 30a and 30b, and a pair of flat roof tiles 34a installed on each of the lower roofing materials 32a and 32b. 34b. In addition, each of the draining drains 33a and 33b is attached on each of the waterproof papers 30a and 30b, and each of the lower dredging materials 32a and 32b is installed in that state.

  The ventilation building 55 is lowered from above on the roofing material 35 thus configured. At this time, in the ventilation members 39a and 39b, the surfaces corresponding to the upper bases of the trapezoidal cross-sectional shapes face the lower surfaces of the inclined portions 17a and 17b, and the surfaces corresponding to the lower bases are the flat tiles 34a and 34b, respectively. It faces the upper surface side.

  When the alignment of the ventilation building 55 with respect to the roof material 35 and the roof base 28 is completed, the ventilation building 55 is driven by driving the fixing nails 36a and 36b attached with the waterproof packings 37a and 37b shown in FIG. It is fixed to the roof material 35 and the roof base 28.

  The conventional ventilation building installed in this way exhibits a ventilation function and a waterproof function in the horizontal large building as described above.

  Here, in the shed space, there is a problem of air staying in the corner building.

  FIG. 10 is a plan view of the roof shown in FIG. 6 as viewed from above and partly broken, and (1) shows the roof space of the roof where the ventilation building is not installed in the corner building. Yes, (2) shows the appearance of the corner building where the conventional ventilation building is installed.

  First, referring to (1), in the corner building portion 52 inclined downward, a plurality of rows are arranged at regular intervals along the longitudinal direction of the corner building 53 made of bar-shaped wood provided in the corner building portion 52. The rafters 54a and 54b are arranged in parallel in the vertical and horizontal directions of the roof with the corner ridge 53 as the axis of symmetry, and are attached in pairs. That is, each of the rafters 54a and 54b extends along a roof surface (not shown) toward the lower side of the roof.

  The corner building 53 and the rafters 54a and 54b are obstructed like the air flow indicated by the solid line of the air that has risen up the attic space via the ventilation material 58 existing below the roof. In the part which does not become, air reaches the large ridge part 51 and ventilation is performed through the conventional ventilation ridge 55. On the other hand, in the corner building 52, the rafters 54a and 54b are dropped and attached to the corner building 53, so the corner building 53 and the roof base (not shown), and the rafters 54a and 54b and the roof base are in close contact. . Therefore, among the air that has risen up the shed space, the air flows in the corner ridge 53 in the portion where the corner ridge 53 and the rafters 54a and 54b become obstacles like the flow of the air indicated by the broken line arrows. It is impossible to pass above the rafters 54a and 54b, and it is difficult for air to reach the large ridge 51, and air tends to stay in the corner ridge 52.

  Thus, since the air tends to stay in the corner building in the hut space, the necessity for ventilation is high.

  Further, in the ventilation building 55 installed in the large building 51, since the large building 51 is horizontal as described above, rainwater tends to enter mainly from above, but the ventilation installed in the corner building 52 is used. In the ridge 55, since the corner ridge portion 52 is inclined downward, as shown by the arrow drawn by the solid line in (2), when wind and rain blow from the side (width direction) of the ventilation ridge 55, Rainwater may try to enter from the side of the ventilation building 55 along the flow of the roofing material 35. A problem that may occur at this time will be described.

  FIG. 11 is a cross-sectional view illustrating a state of a corner ridge portion on the assumption that a conventional ventilation wing is directly installed, and corresponds to FIG.

  Referring to the figure, in the corner building 52, the roofing materials 35 are installed so as to have a staircase shape in which a part of each is overlapped. Therefore, as shown by the alternate long and short dash line, it is assumed that the ventilation building 55 having a substantially straight mounting surface is installed directly on the roofing material 35 installed in a staircase shape, and enters the inside of the ventilation building from the width direction. A possible cavity 41 (finely shaded portion in the figure) is generated. If rainwater is to enter the hollow portion 41 from the width direction of the ventilation building 55 as described above, water enters the inside of the ventilation building 55 or the corner building 52. Therefore, it is possible to seal with a putty construction or the like in order to close the hollow portion 41, but lack of reliability because a gap due to secular change is generated. Since such a problem peculiar to the corner building exists, it is problematic to install the conventional ventilation building 55 directly on the corner building 52 from the viewpoint of waterproofness.

  In order to improve the staying state of the air inside the corner building, there are means disclosed in Patent Document 2 and Patent Document 3.

  The means disclosed in Patent Document 2 does not use a structure like a conventional ventilation building, and forms an air circulation hole by forming an opening in the roof surface between adjacent rafters, which is a place where air stays. The circulation hole is provided with a cover so that rainwater does not enter.

  The means disclosed in Patent Document 3 forms a shield plate of a predetermined length on the ventilation port side of the ventilation member inside the ventilation building, and by the shield plate, not only wind and rain from the short direction that is the ventilation direction, It also copes with wind and rain from the long direction.

JP 2006-9293 A JP 2015-34447 A JP2013-249696A

  However, in the means disclosed in Patent Document 2, as described above, the corner building has a peculiar problem such as blowing wind and rain from the side and intrusion of rainwater along the flow of the roofing material, and thus it is formed on the roof surface. The water resistance against the air circulation holes was not perfect.

  Moreover, in the means disclosed in Patent Document 3, if the roofing materials are installed flat, the disclosed ventilation building can be placed in the corner building, and the ventilation performance and waterproof performance can be satisfied. In fact, as shown in FIG. 11, roof materials are often installed in steps, and in that case, it is waterproof to directly place the ventilation building disclosed in the corner building as in the conventional ventilation building. From the point of view, it was insufficient.

  The present invention was made to solve the above-described problems, and enables a ventilation ridge to be installed even in a corner ridge where roof materials are installed stepwise. It aims at providing the structure of the corner ridge part which exhibits a waterproof function against the invasion of rain water from the side.

In order to achieve the above object, the invention according to claim 1 is a pair of ventilation ridges installed in corner ridges and a pair of spaces installed along the corner ridges with their end portions as ventilation spaces. A pair of water return structures attached between each of the roof materials, each of the water return structures being made of a watertight material, a part of which is disposed on the lower surface of one end side of the roof material A lower plate disposed above the lower plate, an upper plate on which a part of the ventilation ridge is placed, and a standing plate connected in a watertight manner to the lower plate and the upper plate. The upper plate extends from the connection position with the standing plate to at least the center side of the corner ridge to place a part of the ventilation building, and from the connection position to the virtual plane including the upper surface of the lower plate vertical length is larger than the maximum thickness at the end portion of the roofing, the upper plate is further The angle formed by the upper surface of the upper plate excluding the protruding portion and the upper surface of the protruding portion is in the range of 180 degrees to 90 degrees. is an internal near shall.

If comprised in this way, a ventilation building is not mounted directly on a roof material, and the upper surface of a roof material does not exceed the upper surface of the upper board of a water return structure. Further, the ventilation board is placed on the portion excluding the protruding portion of the upper plate, and the protruding portion effectively prevents rainwater from entering.

According to a second aspect of the invention, in the structure of the invention of claim 1 Symbol placement, the angle formed by the lower plate and the upright plate is 90 degrees, the angle formed by the upright plate and the upper plate 90 degrees, and the protruding length of the protruding portion is the same as the vertical length.

  If comprised in this way, an upper board will extend in parallel with respect to a lower board, and a protrusion part becomes fixed length.

The invention described in claim 3 is obtained by bending one steel sheet in the configuration of the invention described in claim 1 or claim 2 .

  If comprised in this way, each member will integrate.

Invention of Claim 4 is the ventilation ridge structure constructed in the corner ridge using the water return structure in any one of Claims 1-3 .

  If comprised in this way, a ventilation function and a waterproof function will be exhibited in the whole ventilation building structure.

As described above, in the invention described in claim 1, the ventilation building is not placed directly on the roof material, and the upper surface of the roof material does not exceed the upper surface of the upper plate of the water return structure. In addition, the installation state of the ventilation building is stabilized, and the waterproof effect against the ingress of rainwater is improved. In addition, the ventilation board is placed on the part of the upper plate except the protruding part, and the protruding part effectively prevents the intrusion of rainwater, so that the role of each part can be shared and the reliability of the installation state is further improved. .

According to a second aspect of the invention, in addition to the effect of the invention of claim 1 Symbol mounting, it extends parallel upper plate against the lower plate, and, since the protrusion is constant length, ventilation building installation state Is more stable. In addition, the protruding portion can be made efficient.

According to a third aspect of the invention, in addition to claim 1 or claim 2, according to the present description, since the respective members are integrated, are cost effective, and is reliable watertightness water flashing structure It will be a thing.

In addition to the effect of the invention according to any one of claims 1 to 3 , the invention according to claim 4 exhibits a ventilation function and a waterproof function in the entire ventilation building structure, The reliability of the ventilation state is improved.

It is a schematic perspective view which shows the external shape especially the surroundings of a roof of the house which installed the ventilation building in the corner building part using the water return structure by embodiment of this invention. It is a schematic end view of the II-II line shown in FIG. 1, and shows the cross-sectional structure of the ventilation ridge using the water return structure by embodiment of this invention. FIG. 3 is an enlarged end view around the water return structure shown in FIG. 2. It is a schematic sectional drawing of the IV-IV line shown in FIG. 2, and shows about the installation state of a ventilation building. It is the schematic end elevation which showed the attachment process of the ventilation building shown in FIG. It is a schematic perspective view which shows the external appearance shape especially the surroundings of a roof of the house in which the conventional ventilation building was installed. FIG. 7 is a schematic end view of the VII-VII line shown in FIG. 6 and shows a cross-sectional structure of a conventional ventilation building disclosed in Patent Document 1. It is a schematic sectional drawing of the VIII-VIII line shown in FIG. 7, and has shown the state which looked at the cross section of the ventilation building, the roof material, and the roof base from the width direction of the ventilation building. It is the schematic end view which showed the state before attaching the ventilation building shown in FIG. 7 to a roof material. FIG. 7 is a plan view of the roof shown in FIG. 6 viewed from above and partly broken, and (1) shows a roof space of the roof where a ventilation building is not installed in the corner building, 2) shows the appearance of the corner building where the conventional ventilation building is installed. It is a schematic sectional drawing which shows the state of the corner ridge part assumed that the conventional ventilation building is directly installed, and corresponds to FIG.

  FIG. 1 is a schematic perspective view showing an external shape, particularly around a roof, of a house in which a ventilation building is installed in a corner building using a water return structure according to an embodiment of the present invention.

  Referring to the figure, in addition to the conventional ventilation building 55 installed in the large building 51 in the house 50, the ventilation building 11 is installed in the corner building 52 using the water return structure 1 according to the present invention. And constitutes a ventilation building structure.

  Next, the structure (ventilation structure) around the ventilation building 11 in the corner building 52 will be described.

  FIG. 2 is a schematic end view taken along line II-II shown in FIG. 1 and shows a ventilation structure using a water return structure according to an embodiment of the present invention.

  Referring to the drawing, the ventilation structure 10 is attached to each of a pair of roofing materials 35a and 35b and roof bases 28a and 28b that are installed at a predetermined interval along the corner ridge 53 with the ends thereof as ventilation spaces. A pair of base material 8a, 8b made of wood and engaged with each of the water return structures 1a, 1b installed on a part of the upper surface of each of the pair of water return structures 1a, 1b and the roof bases 28a, 28b. And a pair of water return structures 1a, 1b and a ventilation ridge 11 installed on the corner ridge 53 so as to be placed on the pair of base materials 8a, 8b. The ventilation building 11 has basically the same structure as the conventional ventilation building.

  In the ventilation state, as shown by the arrows, the air inside the corner building raised from the ventilation space between the corner building 53 and each of the roofing materials 35a and 35b is between the drains 33a and 33b. And passes from the inner side to the outer side through the ventilation holes of the ventilation members 39a and 39b. The passed air is discharged outward through a plurality of ventilation ports 14 formed in each of the inclined portions 17a and 17b.

  Next, each of the water return structures 1a and 1b is formed by bending a single steel plate, which is a watertight material, by forming or the like, so that one end of each of the roof materials 35a and 35b in the direction of the corner building 53 is provided. A pair of lower plates 5a, 5b, a part of which is disposed on the lower surface of the lower plate, and a pair of upper plates 2a, which are disposed above each of the lower plates 5a, 5b and on which a part of the ventilation building 11 is placed. 2b and standing plates 4a and 4b connected to each of the lower plates 5a and 5b and each of the upper plates 2a and 2b in a watertight state. Each of the upper plates 2a and 2b has a pair of projecting portions 3a and 3b that project to the respective sides of the roof materials 35a and 35b from the connection positions with the standing plates 4a and 4b.

  Next, the structure and effect of the water return structure 1 will be described.

  FIG. 3 is an enlarged end view around the water return structure shown in FIG.

  Referring to the figure, the vertical length from the connection position 24 between the standing plate 4 and the upper plate 2 to the virtual plane 25 including the upper surface of the lower plate 5 is set to H, and the corner ridge (not shown) of the roof material 35 is shown. I) If the maximum thickness on the direction end side is T, H is set larger than T. For this reason, even if rainwater flows from the width direction of the ventilation building 11 as shown by the arrows in the figure, the standing plate 4 prevents the rainwater from entering the ventilation building 11 or corner building. There is no fear of doing. In the water return structure 1 according to this embodiment, since the angle formed by the lower plate 5 and the standing plate 4 is 90 degrees, the roof material 35 in parallel with the lower plate 5 The upright plate 4 is in a vertical state, and the upright plate 4 efficiently prevents intrusion against the flow of rainwater entering from the width direction of the ventilation building 11 along the flow of the roofing material 35. can do.

  Further, in this embodiment, since the upper plate 2 has the protruding portion 3, the rainwater flow as described above is repelled by the protruding portion 3 after hitting the standing plate 4. As a result, the intrusion of rainwater can be reliably prevented.

  Furthermore, if the angle formed by the upper plate 2 excluding the protrusion 3 and the protrusion 3 is θ, θ is set to 180 degrees in this embodiment. If θ is in the range of 180 degrees to 90 degrees, the projecting portion 3 exhibits the effect of repelling the flow of rainwater as described above, and then the repelled rainwater is directed to the upper surface of the upper plate 2. Since there is no, the waterproof effect can be further ensured. Note that θ is set to 90 degrees when the protrusion 3 extends vertically upward with respect to the upper plate 2 excluding the protrusion 3.

  Furthermore, when the protruding length of the protruding portion 3 (the maximum straight line length from the connection position 24 to the roof material 35 direction of the protruding portion 3) is L, the protruding portion 3 is formed so that L is the same as H. ing. If L is too short, the effect of repelling the flow of rainwater as described above will be reduced, but conversely if L is too long, the effect will not be greatly increased. Therefore, by setting L of the protruding portion 3 to be the same as H, it is possible to exhibit the effect of repelling efficiently.

  Further, since the water return structure 1 is formed by bending one steel plate, the lower plate 5 and the upright plate 4, and the upright plate 4 and the protruding portion 3 are integrally connected in a bent state. Further, the protruding portion 3 is integrally connected to the upper plate 2 in a folded state. Therefore, the water tightness of the water return structure 1 is assured, and there is no possibility that rainwater enters from each part or connection position of the water return structure 1.

  A base material 8 is installed in a space including the upper plate 2, the standing plate 4, and the roof base 28 of the water return structure 1. The base material 8 is fixed so as to contact the upper plate 2, the upright plate 4, and the roof base 28. At this time, since the angle formed by the upper surface of the roof base 28 and the upright plate 4 and the upright plate 4 and the upper plate 2 is 90 degrees, the base material 8 has a rectangular cross section that does not require special processing. Things can be used. And the plane which consists of the upper surface of the base material 8 and the upper board 2 of the water return structure 1 becomes flat. Therefore, as shown in FIG. 2, a ventilation building 11 having a structure basically similar to a conventional ventilation building is stably installed on the pair of water return structures 1a and 1b and the pair of base materials 8a and 8b. Is possible. Moreover, in the water return structure 1 according to this embodiment, the mounting surface of the ventilation building 11 (the plane formed by the upper surface of the base material 8 and the upper plate 2) is parallel to the roof material 35 by the structure described above. Therefore, the installation state of the ventilation building 11 is extremely stable.

  FIG. 4 is a schematic cross-sectional view taken along the line IV-IV shown in FIG. 2 and shows the installed state of the ventilation building.

  Referring to the figure, the lower plate 5 of the water return structure 1 is inserted between the roof material 35 and the roof base 28, and the ventilation building 11 is stably placed on the upper plate 2 which is flat. is set up.

  Moreover, even if the roof materials 35 are installed stepwise, the cavity portion shown in FIG. 11 is present because the standing plate 4 is connected to the upper plate 2 and the lower plate 5 in a watertight state as described above. 41 does not occur, and there is no risk of water entering the inside of the ventilation building 11 or the inside of the corner building even if a wind and rain that tries to enter from the width direction of the ventilation building 11 occurs.

  Thus, the water return structure according to the embodiment of the present invention enables a ventilation ridge to be installed even in a corner ridge where roof materials are installed in steps, and is unique to the corner ridge. It provides a reliable waterproof function against rainwater intrusion from the side.

  Next, the process of attaching the ventilation building to the corner building using the water return structure will be described.

  FIG. 5 is a schematic end view showing a process of attaching the ventilation building shown in FIG.

  Referring to the figure, the pair of roof bases 28a and 28b and the pair of roof members 35a and 35b are substantially mountain-shaped and are installed along the corner ridge 53 with their ends spaced apart from each other at a constant interval.

First, each of the water return structures 1a and 1b is attached. Each of the lower plates 5a and 5b is inserted between each of the roof materials 35a and 35b and each of the roof bases 28a and 28b, and each of the lower plates 5a and 5b, each of the upright plates 4a and 4b, and the protruding portion 3a, It fixes in the state which the edge part side direction of each corner building 53 of roof material 35a, 35b enters into the space which consists of each of 3b. Then, each of the base materials 8a and 8b is installed so as to come into contact with each of the roof bases 28a and 28b, each of the standing plates 4a and 4b, and each of the upper plates 2a and 2b.

  Next, after each draining drain 33a, 33b is mounted on the corner ridge 53 direction end part of each base material 8a, 8b, the ventilation tower 11 is paired with a pair of water return structures 1a, 1b and a pair of base materials. It is mounted on a plane composed of 8a and 8b.

  When the alignment of the ventilation tower 11 with respect to the pair of water return structures 1a, 1b and the pair of base materials 8a, 8b is completed, the ventilation tower 11 is driven into a pair of base materials by driving a fixing nail (not shown) at that position. It fixes to 8a, 8b and a pair of roof bases 28a, 28b.

  In the ventilation building 11 installed in the corner building 52 in this way, in the corner building part, not only the ventilation function and the waterproof function of the conventional ventilation building but also the intrusion of rainwater from the side unique to the corner building part. The waterproof function is also demonstrated.

  In the above embodiment, the house is a dormitory roof, and the water return structure and the ventilation ridge of the present invention are attached to one of the corner ridges. It may be attached to all corner buildings.

  Further, in the above embodiment, the pair of water return structures are two in the same shape, but may have different shapes corresponding to roofing materials and other peripheral structures. .

  Furthermore, in the above embodiment, the material of the water return structure is a steel plate, but other materials may be used as long as they are watertight materials.

  Furthermore, in the above embodiment, the upper plate of the water return structure has the protruding portion, but the protruding portion may not be provided.

  Furthermore, in the above-described embodiment, the angle formed by the protruding portion and the standing plate is 90 degrees, but the same effect can be obtained if it is within the range of 90 degrees to 180 degrees.

  Furthermore, in the above embodiment, the angle formed by the lower plate and the upright plate is 90 degrees, but if H is set larger than T as shown in FIG. It may be an angle.

  Furthermore, in the above-described embodiment, the angle formed by the standing plate and the upper plate is 90 degrees, but other angles may be used such as corresponding to the ventilation building and other peripheral structures.

  Furthermore, in the above embodiment, the standing plate is flat and is in contact with the upper plate. However, the standing plate has a function of preventing rainwater from entering from the width direction of the ventilation building in the water return structure. As long as it has a portion, it may be other shapes such as a rounded one that cannot be clearly separated from the upper plate in appearance. H in the case where the connection position between the upright plate and the upper plate cannot be clearly determined is the vertical length from the lower surface of the upper plate to the upper surface of the lower plate in the width direction view of the ventilation building as shown in FIG.

  Further, in the above embodiment, the protruding length L of the protruding portion is the same as H, but other lengths may be used.

  Further, in the above-described embodiment, the ventilation building installed in the corner building is basically the same as the ventilation building installed in the large horizontal building, but it corresponds to the shape of the corner building. For example, other ventilation buildings may be used.

  Further, in the above embodiment, the lower plate does not have a protruding portion, but the lower plate may have a protruding portion that extends inward from the connection position with the standing plate. In that case, there is an effect of further improving the stability of the installation state of the ventilation building, for example, by improving the fixing property of the base material.

  Furthermore, in the above-described embodiment, the ventilation wing structure is constructed in a corner ridge that is installed in a staircase shape in which roof materials overlap each other, but the roof materials are installed flat. Can also be used in the corner building.

  Furthermore, in the above embodiment, the base material is used, but the base material may be omitted.

DESCRIPTION OF SYMBOLS 1 ... Water return structure 2 ... Upper plate 3 ... Protruding part 4 ... Standing plate 5 ... Lower plate 11 ... Ventilation building 24 ... Connection position 25 ... Virtual plane 35 ... Roof material 53 ... Corner building 55 ... Ventilation building In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (4)

A pair of water return structures attached between a ventilation ridge constructed in a corner ridge and a pair of roofing materials installed along the corner ridge with a gap between the ends thereof as a ventilation space. Because
Each of the water return structures is made of a watertight material,
A lower plate, a part of which is disposed on the lower surface on one end side of the roof material;
An upper plate disposed above the lower plate, on which a part of the ventilation building is placed;
A standing plate connected in a watertight manner to the lower plate and the upper plate,
The upper plate has an upper surface of the standing extends at least toward the center side of the corner ridge from the connection position with the up plate, the lower plate before Kise' connection position for mounting a portion of the ventilation ridge Is set to be larger than the maximum thickness on the end side of the roof material ,
The upper plate further includes a protruding portion that protrudes toward the roof material side relative to a connection position with the standing plate, and includes an upper surface of the upper plate excluding the protruding portion and an upper surface of the protruding portion. A water return structure in which the angle formed is in the range of 180 to 90 degrees . The angle formed by the lower plate and the standing plate is 90 degrees, the angle formed by the standing plate and the upper plate is 90 degrees, and the protruding length of the protruding portion is the vertical. it is the same as the length, water flashing structure according to claim 1 Symbol placement. The water return structure according to claim 1 or 2, wherein one steel plate is bent. The ventilation ridge structure constructed in a corner ridge using the water return structure in any one of Claims 1-3 .

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