JP2011007034A - Roof ventilator, construction method thereof, and vent pipe replacement method thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a roof ventilator in which a vent pipe can easily be replaced, and to provide a construction method thereof and a vent-pipe-replacement method thereof.SOLUTION: The roof ventilator 10 is installed on an upper part of a drainage pipe 102 provided in a building 100 for taking outside air into the drainage pipe 102. The roof ventilator 10 comprises: a sheath pipe 12 passing vertically through a roof slab 104 in the building 100; and a vent pipe 14. The vent pipe 14 is, for example, a pipe of a synthetic resin such as polyvinyl chloride or polyethylene, and is inserted into the sheath pipe 12 with a portion between the vent pipe 14 and the sheath pipe 12 hermetically sealed. The lower end of the vent pipe 14 is connected to the drainage pipe 102. Further, on the upper end of the vent pipe 14, a mounting bracket 24, for example is fixed. A vent-pipe-protecting member 26 that covers an upper end opening of the vent pipe 14 is provided through the mounting bracket 24.

Description

  The present invention relates to a rooftop ventilation device, a construction method thereof, and a ventilation pipe updating method thereof, and more particularly, for example, a rooftop installed on an upper part of a drainage pipe disposed in a building having a rooftop slab and taking outside air into the drainage pipe. The present invention relates to a ventilation device, a construction method thereof, and a ventilation pipe updating method thereof.

  2. Description of the Related Art Conventionally, a technique for installing a rooftop ventilation device on an upper portion of a drainage stack in order to take outside air into a drainage stack arranged in a high-rise building such as an apartment house or a building is known.

  For example, Patent Document 1 discloses a roof ventilation device embedded in concrete of a roof slab. In this rooftop ventilation device, a ventilation riser pipe and a socket provided at the lower end thereof are integrally embedded in the rooftop slab, and the ventilation pipe connected to the upper part of the drainage riser pipe through this socket; A vent riser pipe is connected.

Patent Document 2 discloses a drainage vent pipe joint (a rooftop ventilator) having a driving support. In this drainage vent pipe joint, the cylindrical portion and the saucer portion of the driving support are embedded in the concrete floor wall, and an insertion hole penetrating the concrete floor wall in the vertical direction is formed by the cylindrical portion. . And a joint pipe body is fixed to the saucer part arrange | positioned at the upper surface of a concrete floor wall, and the ventilation pipe (ventilating upright pipe) penetrated by the insertion hole to this joint pipe body is connected.
JP 2006-124981 [E04D 13/14] JP 10-25865 [E04D 13/143]

  In the technique of Patent Document 1, since the ventilating riser pipe is embedded and fixed in the concrete of the roof slab, if the concrete of the roof slab is not broken, the ventilating riser pipe is repaired or replaced (updated). I can't. Furthermore, since the waterproof layer is formed so as to cover the outer periphery of the ventilating riser pipe, it is necessary to peel off the waterproof layer in order to renew the ventilating riser pipe, and it takes time and effort to perform the construction.

  In the technique of Patent Document 2, since the vent pipe is inserted through the insertion hole formed by the cylindrical portion of the driving support, the vent pipe can be inserted and removed by removing the joint pipe from the tray portion. However, since a waterproof layer is laid from the upper surface of the concrete floor wall to the outer peripheral surface of the joint body, it is necessary to remove this waterproof layer in order to renew the vent pipe. Take it.

  Therefore, a main object of the present invention is to provide a novel rooftop ventilation device, its construction method, and its ventilation pipe renewal method.

  Another object of the present invention is to provide a rooftop ventilation apparatus, a construction method thereof, and a ventilation pipe updating method thereof that can easily update the ventilation pipe.

  The present invention employs the following configuration in order to solve the above problems. Note that reference numerals in parentheses, supplementary explanations, and the like indicate correspondence relationships with embodiments described later to help understanding of the present invention, and do not limit the present invention in any way.

  1st invention is the roof ventilation apparatus installed in the upper part of the drain pipe arrange | positioned in the building which has a roof slab, and takes in external air to the said drain pipe, penetrates a roof slab to an up-down direction, and the said roof A sheath pipe fixed to the slab, a vent pipe that is inserted into the sheath pipe in a sealed state and connected to the drain pipe, and a vent pipe that covers the upper end opening of the vent pipe at intervals. It is a roof ventilation apparatus provided with a trachea protection member.

  In the first invention, the rooftop ventilation device (10) is installed at the upper part of the drainage pipe in order to take outside air into the drainage pipe (102) disposed in the building (100). A sheath pipe (12) and a vent pipe (14) penetrating the slab (104) in the vertical direction are provided. The vent pipe is a pipe made of synthetic resin such as vinyl chloride or polyethylene, for example, and is inserted into the inside of the sheath pipe in a sealed state with the sheath pipe, and its lower end is connected to the drain pipe. Further, for example, a mounting bracket (24) is fixed to the upper end portion of the vent pipe, and a vent pipe protection member (26) that covers the upper end opening of the vent pipe is provided via the mounting bracket.

  According to the first invention, the ventilation pipe can be updated without breaking the roof slab. Furthermore, for example, even if a waterproof layer is formed from the upper surface of the roof slab to the outer peripheral surface of the sheath tube, the ventilation tube can be updated without removing the waterproof layer. Therefore, the ventilation pipe of the rooftop ventilation device can be easily updated.

  The second invention is dependent on the first invention, and further includes a rubber ring groove formed on the inner peripheral surface of the sheath tube, and a rubber ring attached to the rubber ring groove and contacting the outer peripheral surface of the vent pipe. .

  In the second invention, a rubber ring groove (16) is formed on the inner peripheral surface of the sheath pipe (12), and a rubber ring (18) is attached to the rubber ring groove. For example, a vent pipe ( 14), the inner peripheral portion of the rubber ring comes into contact with the outer peripheral surface of the vent pipe.

  According to the second invention, the space between the inner peripheral surface of the sheath tube and the outer peripheral surface of the vent tube is sealed. Therefore, it is possible to ensure water tightness and air tightness between the sheath pipe and the vent pipe.

  A third invention is dependent on the first invention, and further includes a rubber cover that covers the outer peripheral surface of the upper end portion of the sheath pipe and the outer peripheral surface of the vent pipe.

  In the third invention, rubber covers (120, 132) are provided at the upper end of the sheath tube (12). The rubber cover is formed, for example, in a substantially cylindrical shape and covers the outer peripheral surface of the sheath tube and the outer peripheral surface of the vent pipe (14).

  According to the third invention, the space between the outer peripheral surface of the sheath tube and the outer peripheral surface of the vent tube is sealed. Therefore, it is possible to ensure water tightness and air tightness between the sheath pipe and the vent pipe.

  A fourth invention is dependent on the third invention, and the rubber cover is composed of an upper part of the main body, a middle part of the main body, and a lower part of the main body, and the upper part of the main body is in close contact with the outer peripheral surface of the vent pipe, and The roof ventilation apparatus according to claim 3, wherein the middle part is in close contact, and the lower part of the main body covers the upper end part of the waterproof layer formed from the upper surface of the roof slab to the outer peripheral surface of the sheath tube.

  In the fourth invention, the rubber cover (120) includes a main body upper part (122), a main body middle part (124), and a main body lower part (126), and the upper part of the main body is tightened by, for example, a tightening band (48) and the ventilation pipe (14 ) And the middle part of the main body is tightened with a tightening band, for example, so as to be in close contact with the outer peripheral surface of the sheath tube (12). The lower body portion (126) of the rubber cover extends downward from the middle portion of the main body and covers the upper end portion of the waterproof layer (42, 46) formed from the upper surface of the roof slab (104) to the outer peripheral surface of the sheath tube. This prevents water from entering between the sheath tube and the waterproof layer.

  According to 4th invention, the weather resistance of a sheath pipe can be improved because the outer peripheral surface of a sheath pipe is not exposed outside. Therefore, deterioration over time of the sheath can be suppressed.

  A fifth invention is dependent on any one of the first to fourth inventions, and the sheath tube is disposed inside the through-hole penetrating the roof slab in the vertical direction via a filler.

  In the fifth invention, for example, by placing the void pipe (114) on the mold (106) when placing concrete on the roof slab (104), a through-hole (116) penetrating the roof slab (104) in the vertical direction is provided. ) And the sheath tube (12) is disposed inside the through hole. The inside of the through hole is filled with a filler (118), and the sheath tube is fixed to the roof slab via the filler.

  A sixth invention is dependent on any one of the first to fifth inventions, and further includes a flange portion that is fixedly provided on the outer peripheral surface of the sheath tube and projects outward in the radial direction of the sheath tube.

  In 5th invention, the flange part (20) which protrudes to the outer side of the radial direction of a sheath pipe is provided in the outer peripheral surface of a sheath pipe (12). For example, the flange portion is fixed to the mold (106) and is integrally embedded in the roof slab when concrete is placed on the roof slab (104) to prevent the sheath tube from being lifted or tilted. Further, for example, the flange portion is fixed to the lower surface of the roof slab, and prevents the filler from leaking downward when the filler (118) is filled into the through hole (116).

  7th invention is the construction method of the roof ventilator of any one of 1st thru | or 4th invention, Comprising: (a) The step which arrange | positions a sheath pipe in a formwork, (b) Placing concrete in a formwork And forming a roof slab in which the sheath pipe is integrally embedded, and (c) inserting the vent pipe into the sheath pipe and connecting the vent pipe and the drain pipe disposed in the building. And (d) a rooftop ventilation apparatus construction method including a step of covering an upper end opening of the ventilation pipe with a ventilation pipe protection member.

  In 7th invention, the mold (106) for forming a rooftop slab (104) is formed in step (a), and a sheath pipe (12) is arrange | positioned in the mold. In step (b), concrete is placed in the mold to form a roof slab in which the sheath tube is integrally embedded and fixed. In step (c), the vent pipe (14) is inserted into the sheath pipe, and the lower end thereof is connected to the pipe connecting member (110). And the drain pipe (102) arrange | positioned in the building (100) and a vent pipe are connected through this pipe | tube connection member. In step (d), the mounting bracket (24) is fixed to the upper end portion of the vent pipe, and the vent pipe protection member (26) covering the upper end opening of the vent pipe is provided via the mounting bracket.

  According to the 7th invention, there exists an effect similar to 1st invention.

  8th invention is the construction method of the roof ventilation apparatus of 5th invention, Comprising: (a) The step which arrange | positions a sheath pipe inside the through-hole which penetrates a roof slab to an up-down direction, (b) A step of filling the interior with a filler; (c) a step of inserting a vent pipe into the sheath pipe and connecting the vent pipe to a drain pipe disposed in the building; and (d) an upper end opening of the vent pipe. It is a construction method of the roof top ventilation apparatus including the step of covering with a ventilation pipe protection member.

  In 8th invention, in a step (a), a sheath pipe (12) is arrange | positioned inside the through-hole (106) which penetrates a roof slab (104) to an up-down direction. In step (b), the inside of the through hole is filled with a filler (118). In step (c), the vent pipe (14) is inserted into the sheath pipe, and the lower end thereof is connected to the pipe connecting member (110). And the drain pipe (102) arrange | positioned in the building (100) and a vent pipe are connected through this pipe | tube connection member. In step (d), the mounting bracket (24) is fixed to the upper end portion of the vent pipe, and the vent pipe protection member (26) covering the upper end opening of the vent pipe is provided via the mounting bracket.

  According to the eighth invention, even after the concrete placement of the roof slab, the sheath pipe does not protrude above the upper surface of the roof slab until the sheath pipe is disposed inside the through hole. For this reason, even if a building is under construction work, for example, the sheath tube does not interfere with other construction work and is excellent in workability.

  Further, by inserting the vent pipe into the sheath pipe in advance, it is possible to prevent poor bonding due to misalignment or oblique insertion of the pipe axis between the vent pipe and the drain pipe.

  9th invention is the construction method of the roof ventilation apparatus of 6th invention, Comprising: (a) Arranging a sheath pipe to the said formwork by fixing a flange part to a formwork, (b) type | mold A step of placing concrete in the frame to form a roof slab in which the sheath pipe is integrally embedded; (c) the vent pipe is inserted into the sheath pipe, and the vent pipe and the building are disposed. It is a construction method of a rooftop ventilation apparatus, including a step of connecting a drain pipe and (d) covering an upper end opening of the ventilation pipe with a ventilation pipe protection member.

  In 9th invention, in a step (a), a sheath pipe is arrange | positioned to a mold by fixing the flange part (20) of a sheath pipe (12) to a mold (106). In step (b), concrete is placed in the mold to form a roof slab (104) in which the sheath pipe is integrally embedded and fixed. In step (c), the vent pipe (14) is inserted into the sheath pipe, and the lower end thereof is connected to the pipe connecting member (110). And the drain pipe (102) arrange | positioned in the building (100) and a vent pipe are connected through this pipe | tube connection member. In step (d), the mounting bracket (24) is fixed to the upper end portion of the vent pipe, and the vent pipe protection member (26) covering the upper end opening of the vent pipe is provided via the mounting bracket.

  According to the ninth invention, the flange portion can prevent the sheath pipe from being lifted or inclined when the concrete of the roof slab is placed.

  10th invention is the construction method of the roof ventilation apparatus of 6th invention, Comprising: (a) By fixing a flange part to the lower surface of a roof slab, the inside of the through-hole which penetrates the said roof slab to an up-down direction (B) a step of filling the inside of the through hole with a filler, (c) a vent pipe inserted into the sheath pipe, and the drain pipe disposed in the vent pipe and the building And (d) covering the upper end opening of the vent pipe with the vent pipe protection member.

  In 10th invention, in step (a), by fixing the flange part (20) of a sheath pipe (12) to the lower surface of a roof slab (104), the through-hole (106 which penetrates the said roof slab to an up-down direction) ) Place the sheath tube inside. In step (b), the inside of the through hole is filled with a filler (118). In step (c), the vent pipe (14) is inserted into the sheath pipe, and the lower end thereof is connected to the pipe connecting member (110). And the drain pipe (102) arrange | positioned in the building (100) and a vent pipe are connected through this pipe | tube connection member. In step (d), the mounting bracket (24) is fixed to the upper end portion of the vent pipe, and the vent pipe protection member (26) covering the upper end opening of the vent pipe is provided via the mounting bracket.

  According to the tenth invention, when the filler is filled in the through hole, the flange can be prevented from leaking downward.

  The eleventh invention is dependent on the eighth or tenth invention, and prior to step (a), a step of placing a void tube in the mold, concrete is placed in the mold, and the void pipe is integrated. And forming a through hole penetrating the roof slab in the vertical direction by disassembling the void tube.

  In the eleventh aspect, before the step (a), the void tube (114) is disposed on the mold (106). And concrete is cast in a formwork and the roof slab (104) which embedded the void pipe | tube integrally is formed. Thereafter, the void tube is disassembled to form a through hole (116) penetrating the roof slab in the vertical direction.

  In a twelfth aspect of the present invention, the roof pipe is inserted into the inside of the sheath pipe in a state where the roof pipe passes through the roof slab in the vertical direction and is sealed between the sheath pipe fixed to the roof slab and the inner peripheral surface of the sheath pipe. A vent pipe renewal method for a rooftop ventilator comprising a vent pipe connected to a drain pipe disposed on the roof, and a vent pipe protection member that covers the upper end opening of the vent pipe with a space therebetween, comprising: Removing the vent pipe protection member covering the upper end opening; (b) pulling out the vent pipe from the sheath pipe; (c) inserting a new vent pipe into the sheath pipe; and (d) opening the upper end opening of the new vent pipe. It is a vent pipe update method including the step of covering with a vent pipe protection member.

  In the twelfth invention, in step (a), the vent pipe protection member (26) provided on the vent pipe (14) is removed. In step (b), the vent tube is withdrawn from the sheath tube (12). In step (c), a new vent pipe is inserted into the inside of the sheath pipe. In step (d), the upper end opening of the new vent pipe is covered with a vent pipe protection member.

  According to this invention, since the ventilation pipe that forms the ventilation path to the drain pipe is inserted into the sheath pipe that penetrates the roof slab in the vertical direction, the ventilation pipe of the roof ventilation device can be easily updated. it can.

  The above object, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

It is sectional drawing which shows a mode that the roof ventilation apparatus of one Example of this invention was installed in the upper part of the drain pipe. It is an illustration figure which shows the attachment metal fitting of FIG. (A) is a top view which shows the vent pipe protection member of FIG. 1, (B) is a side view which shows the vent pipe protection member of FIG. It is sectional drawing which shows a mode that the roof ventilation apparatus of FIG. 1 is constructed. It is sectional drawing which shows a mode that the roof ventilation apparatus of FIG. 1 is constructed. It is sectional drawing which shows a mode that the roof ventilation apparatus of FIG. 1 is constructed. It is sectional drawing which shows a mode that the roof ventilation apparatus of another Example of this invention was installed in the upper part of the drain pipe. It is sectional drawing which shows a mode that the roof ventilation apparatus of FIG. 7 is constructed. It is sectional drawing which shows a mode that the roof ventilation apparatus of FIG. 7 is constructed. It is sectional drawing which shows a mode that the roof ventilation apparatus of another Example of this invention was installed in the upper part of the drain pipe. It is sectional drawing which shows a mode that the roof ventilation apparatus of another Example of this invention was installed in the upper part of the drain pipe. It is sectional drawing which shows a mode that the roof ventilation apparatus of another Example of this invention was installed in the upper part of the drain pipe. It is sectional drawing which shows a mode that the roof ventilation apparatus of another Example of this invention was installed in the upper part of the drain pipe. It is a top view which shows the rubber cover of FIG. It is an enlarged view which shows the detail of the part which attached the rubber cover in FIG. It is sectional drawing which shows the rubber cover of FIG. It is sectional drawing which shows a mode that the roof ventilation of another Example of this invention was installed in the upper part of the drain pipe. It is sectional drawing which shows a mode that the roof ventilation apparatus of another Example of this invention was installed in the upper part of the drain pipe. It is sectional drawing which shows a mode that the roof ventilation apparatus of another Example of this invention was installed in the upper part of the drain pipe. It is sectional drawing which shows a mode that the roof ventilation apparatus of another Example of this invention was installed in the upper part of the drain pipe. It is sectional drawing which shows a mode that the roof ventilation apparatus of another Example of this invention was installed in the upper part of the drain pipe. It is sectional drawing which shows a mode that the roof ventilation apparatus of another Example of this invention was installed in the upper part of the drain pipe. It is sectional drawing which shows a mode that the roof ventilation apparatus of another Example of this invention was installed in the upper part of the drain pipe.

  Referring to FIG. 1, a rooftop ventilation device 10 according to an embodiment of the present invention is installed on an upper portion of a drain pipe 102 in order to take outside air into the drain pipe 102 disposed in the building 100. There is a sheath pipe 12 that penetrates the roof slab 104 of the building 100 in the vertical direction, and a vent pipe 14 that is inserted into the sheath pipe 12.

  As shown in FIG. 1, the sheath tube 12 is made of a synthetic resin such as vinyl chloride, and is formed into a straight tube shape by blow molding or the like. The sheath tube 12 extends in the vertical direction, and has an upper end opened above the upper surface of the roof slab 104 and a lower end opened at a height substantially equal to the lower surface of the roof slab 104. For example, the outer diameter of the sheath tube 12 is 126 mm, and the inner diameter is 114 mm.

  However, “vertical” as used herein does not define whether or not it exactly coincides with vertical, but means a vertical direction including a substantially vertical direction.

  A rubber ring groove 16 is formed on the inner peripheral surface near the upper end opening of the sheath tube 12, and a rubber ring 18 is attached to the rubber ring groove 16. As a result, when the vent pipe 14 is inserted into the sheath pipe 12, the inner peripheral portion of the rubber ring 18 comes into contact with the outer peripheral face of the vent pipe 14, and the inner peripheral face of the sheath pipe 12 and the outer peripheral face of the vent pipe 14. The gap is sealed.

  A flange portion 20 that protrudes outward in the radial direction is provided on the outer peripheral surface of the sheath tube 12. The flange portion 20 is disposed at a height position substantially equal to the lower end opening of the sheath tube 12, for example, and will be described in detail later. However, when placing the concrete on the roof slab 104, the flange portion 20 is fixed to the formwork 106 and attached to the roof slab 104. Embedded in one piece. For example, in this embodiment, the short tube portion 22 is fixedly provided at the lower end portion of the sheath tube 12 and the flange portion 20 is formed at the lower end of the short tube portion 22. Alternatively, it is possible to form the flange portion 20 that projects directly outward in the radial direction.

  As described above, the ventilation tube 14 is inserted into the sheath tube 12. The vent pipe 14 is a pipe made of a synthetic resin such as vinyl chloride or polyethylene, and forms a vent path to the drain pipe 102. For example, the outer diameter of the vent pipe 14 is set to be approximately equal to the inner diameter of the sheath pipe 12 to the extent that it can be inserted into the sheath pipe 12.

  The ventilation pipe 14 extends downward from the lower end opening of the sheath pipe 12, and will be described in detail later. The ventilation pipe 14 is inserted into the fiber-mixed mortar pipe 108 at the lower part of the roof slab 104, and the lower end thereof is connected to the pipe connecting member 110. Connected. The vent pipe 14 and the drain pipe 102 disposed in the building 100 are connected through the pipe connecting member 110.

  For example, the fiber-mixed mortar tube 108 is formed in a straight tube shape, and its upper end opening is abutted against the lower end opening of the sheath tube 12. The inner diameter of the fiber-mixed mortar pipe 108 is set to be approximately equal to the outer diameter of the vent pipe 14 so that the vent pipe 14 can be inserted.

  Further, for example, the pipe coupling member 110 is a joint of both receptacles such as an MD joint, and the vent pipe 14 is connected to a receptacle on one side thereof, and the drain pipe 102 is connected to a receptacle on the other side.

  The vent pipe 14 extends upward from the upper end opening of the sheath pipe 12, and a mounting bracket 24 is fixed to the upper end portion of the vent pipe 14. The vent pipe protection member 26 is attached to the upper end opening of the vent pipe 14 via the mounting bracket 24. Is provided.

  As shown in FIG. 2, the mounting bracket 24 extends horizontally across the upper end opening of the vent pipe 14 in the diametrical direction, and a female screw portion 28 for screwing a connection bolt 36 to be described later into the middle portion thereof. Is formed. Screw holes 30 are formed at both ends of the mounting bracket 24, and the mounting bracket 24 and the ventilation pipe 14 are fixed by attaching the screws 32 through the screw holes 30 to the ventilation pipe 14 (FIG. 1).

  As shown in FIG. 3, the vent pipe protection member 26 is formed of, for example, glass fiber reinforced concrete, and has an inverted container shape whose upper end is sealed and whose lower end is open. In this embodiment, the vent pipe protection member 26 is formed in a hexagonal shape in a top view and in a trapezoidal shape in a side view, but is not limited to this, and can ensure ventilation to the vent pipe 14, In addition, any shape that can prevent rainwater and foreign matter from entering the ventilation pipe 14 may be used. The vent pipe protection member 26 covers the upper end opening of the vent pipe 14 with an interval, and the interval is, for example, 10 mm to 100 mm.

  A bolt hole 34 is formed in the upper end surface of the vent pipe protection member 26. The bolt hole 34 is arranged so as to be placed on substantially the same vertical line as the female screw portion 28 of the mounting bracket 24, and the connection bolt 36 through the bolt hole 34 is screwed into the female screw portion 28, whereby the vent pipe. The protection member 26 is detachably fixed to the vent pipe 14 (see FIG. 1).

  A plurality of ventilation portions 38 are formed on the side surface of the ventilation pipe protection member 26, and outside air that has passed through the ventilation sections 38 flows into the upper end opening of the ventilation pipe 14 and is taken into the drainage pipe 102 from the ventilation pipe 14. . In this embodiment, the ventilation portion 38 is a horizontally long slit having a vertical direction of about 20 mm. However, the ventilation portion 38 is not limited to this, and can ensure ventilation to the ventilation pipe 14 and rainwater to the ventilation pipe protection member 26. Or a shape that can prevent the intrusion of foreign matter.

  Further, a notch 40 is provided at the lower end of the vent pipe protection member 26 so that rainwater that has entered the vent pipe protection member 26 can be drained.

  With reference to FIGS. 4-6, the method of constructing such a roof top ventilation apparatus 10 is shown below.

  First, a mold 106 for forming the roof slab 104 constituting the roof is formed, and the sheath tube 12 is arranged in the mold 106. Specifically, by fixing the flange portion 20 provided on the sheath tube 12 to the mold 106, the sheath tube 12 is arranged to extend in the vertical direction.

  Then, as shown in FIG. 4, concrete is placed in the mold 106 to form a roof slab 104 in which the sheath tube 12 is integrally embedded.

  Next, the mold is disassembled, and the waterproof layer 42 is formed from the upper surface of the roof slab 104 to the outer peripheral surface of the sheath tube 12. This waterproof layer 42 is formed by asphalt roofing, for example.

  After forming the waterproof layer 42, a heat insulating layer 44 made of urethane or the like is formed on the waterproof layer 42 covering the upper surface of the roof slab 104, and the sheath tube 12 is further covered from the surface of the heat insulating layer 44. A second waterproof layer 46 is formed over the surface of the waterproof layer 42.

  After the second waterproof layer 46 is formed, the upper end portions of the waterproof layers 42 and 46 located near the upper end opening of the sheath tube 12 are fastened with a stainless steel fastening band 48 and a waterproof seal 50 is provided on the upper end portion.

  Next, as shown in FIG. 5, the ventilation pipe 14 is inserted into the sheath pipe 12 to connect the ventilation pipe 14 and the drain pipe 102 disposed in the building 100. Specifically, as shown in FIG. 6, the ventilation pipe 14 inserted from the upper end opening of the sheath pipe 12 is inserted into the fiber-mixed mortar pipe 108 and connected to the pipe connecting member 110 as it is. Then, the vent pipe 14 and the drain pipe 102 are connected via the pipe connecting member 110.

  Subsequently, a water-stopping caulking material 112 is applied from the outer peripheral surface of the fiber-mixed mortar tube 108 to the lower surface of the flange portion 20 at the abutting portion between the upper end opening of the fiber-mixed mortar tube 108 and the lower end opening of the sheath tube 12.

  Finally, the mounting bracket 24 is fixed to the upper end portion of the vent pipe 14, and the vent pipe protection member 26 is provided at the upper end opening of the vent pipe 14 through the mounting bracket 24, and the operation is completed (see FIG. 1). .

  As described above, in the rooftop ventilation device 10, the ventilation pipe 14 that forms a ventilation path to the drainage pipe 102 is inserted into the inside of the sheath pipe 12 that penetrates the roof slab 104 in the vertical direction. For this reason, for example, when repairing or replacing (updating) the vent pipe 14, the vent pipe protection member 26 is removed from the vent pipe 14, the vent pipe 14 is extracted from the sheath pipe 12, and then the sheath pipe 12 is placed. It is only necessary to insert the new vent pipe 14 and attach the vent pipe protection member 26 to the new vent pipe 14. Therefore, the ventilation pipe 14 can be updated without breaking the roof slab 104. Furthermore, since the waterproof layers 42 and 46 are formed so as to cover the outer peripheral surface of the sheath tube 12, the ventilation tube 14 can be updated without removing the waterproof layers 42 and 46. That is, according to this embodiment, the ventilation pipe 14 of the rooftop ventilation device 10 can be easily updated.

  In addition, since the ventilation pipe 14 can be updated without breaking the roof slab 104, the building 100 in which the roof ventilation apparatus 10 is installed can be easily maintained in the “Law for Promotion of Housing Quality Assurance”. Conforms to grade 2 and above for sex.

  Furthermore, in this embodiment, a rubber ring 18 is attached to the rubber ring groove 16 formed on the inner peripheral surface of the sheath tube 12, and the space between the inner peripheral surface of the sheath tube and the outer peripheral surface of the vent tube is sealed. The For this reason, the watertightness and airtightness between the sheath pipe 12 and the vent pipe 14 can be ensured. Therefore, it is possible to prevent water and insects from entering the building 100 through the gap between the sheath pipe 12 and the vent pipe 14.

  Further, in this embodiment, the flange portion 20 provided on the outer peripheral surface of the sheath tube 12 is fixed to the mold 106 and embedded integrally in the roof slab 104 when the concrete of the roof slab 104 is placed. Therefore, when the concrete of the roof slab 104 is placed, the sheath pipe 12 can be prevented from being lifted or tilted, and the position of the sheath pipe 12 can be maintained. In addition, the position of the sheath tube 12 can be maintained while preventing inclination.

  In this embodiment, the flange portion 20 is provided on the outer peripheral surface of the sheath tube 12, and the position of the sheath tube 12 is maintained by fixing the flange portion 20 to the mold 106, but the present invention is limited to this. There is no need, and the flange portion 20 may not be provided on the outer peripheral surface of the sheath tube 12 as long as the position of the sheath tube 12 can be maintained when the concrete of the roof slab 104 is placed. For example, although illustration is omitted, a reinforcing bar fixing portion is provided in the sheath tube 12, and the reinforcing bar arranged in the mold 106 is sandwiched between the reinforcing bar fixing portions so that the concrete of the roof slab 104 is placed. The position of the sheath tube 12 may be maintained.

  Further, in this embodiment, the sheath tube 12 is integrally embedded in the concrete of the roof slab 104, but is not limited thereto.

  For example, in the rooftop ventilation device 10 according to another embodiment of the present invention shown in FIG. 7, the sheath tube 12 is disposed inside the through-hole 116 that penetrates the roof slab 104 in the vertical direction, and the inside of the through-hole 116 is inside. The sheath tube 12 is fixed to the roof slab 104 through the filled material 118.

  With reference to FIGS. 7-9, the method of constructing such a roof top ventilation apparatus 10 is shown below.

  In order to construct such a roof ventilation device 10, first, a mold 106 for placing the roof slab 104 is formed, and a void tube 114 is disposed in the mold 106. The void tube 114 is a straight tube made of paper, and the outer diameter thereof is set larger than the outer diameter of the sheath tube 12.

  Next, as shown in FIG. 8, concrete is placed in the mold 106. Then, the mold 106 is disassembled and the void tube 114 is removed from the roof slab 104. When the void tube 114 is removed, a through hole 116 that penetrates the roof slab 104 in the vertical direction is formed at that position.

  Next, the sheath tube 12 is disposed in the through hole 116. Specifically, as shown in FIG. 9, the flange portion 20 provided in the sheath tube 12 is fixed to the lower surface of the roof slab 104 so that the sheath tube 12 extends in the vertical direction.

  Then, a filler 118 such as mortar is filled between the inner surface of the through hole 116 and the outer surface of the sheath tube 12. Then, after the filler 118 is dried, the sheath tube 12 is fixed to the roof slab 104 via the filler 118. Note that the upper surface of the filler 118 may be leveled to a height substantially equal to the upper surface of the concrete portion of the roof slab 104 using rubber spatula or the like.

  Next, the waterproof layer 42 is formed from the upper surface of the roof slab 104 to the outer peripheral surface of the sheath tube 12. After forming the waterproof layer 42, the heat insulating layer 44 is formed on the waterproof layer 42 covering the upper surface of the roof slab 104, and the waterproof layer covering the sheath tube 12 from the surface of the heat insulating layer 44. A second waterproof layer 46 is formed over the surface of 42.

  After the second waterproof layer 46 is formed, the upper end portions of the waterproof layers 42 and 46 located near the upper end opening of the sheath tube 12 are fastened with a stainless steel fastening band 48 and a waterproof seal 50 is provided on the upper end portion.

  Next, the vent pipe 14 is inserted into the sheath pipe 12 to connect the vent pipe 14 and the drain pipe 102 disposed in the building 100.

  Subsequently, a water-stopping caulking material 112 is applied from the outer peripheral surface of the fiber-mixed mortar tube 108 to the lower surface of the flange portion 20 of the flange portion 20 at the abutting portion between the upper end opening of the fiber-mixed mortar tube 108 and the lower end opening of the sheath tube 12. Apply.

  Finally, the mounting bracket 24 is fixed to the upper end portion of the vent pipe 14, and the vent pipe protection member 26 is provided in the upper end opening of the vent pipe 14 through the mounting bracket 24, and the operation is completed (see FIG. 7). .

  Also in this embodiment, the vent pipe 14 can be updated without breaking the roof slab 104 as in the embodiment of FIG. Further, the vent pipe 14 can be updated without removing the waterproof layers 42 and 46. Therefore, the ventilation pipe 14 of the rooftop ventilation device 10 can be easily updated.

  Further, in this embodiment, the sheath tube 12 is not integrally embedded in the roof slab 104, but the sheath tube 12 disposed in the through hole 116 is fixed to the roof slab 104 via the filler 118. That is, even after the concrete placement of the roof slab 104, the sheath pipe 12 does not protrude above the upper surface of the roof slab 104 until the sheath pipe 12 is disposed inside the through hole 116. For this reason, even if the building 100 is under construction work, the sheath tube 12 does not interfere with other construction work and is excellent in workability.

  Further, in this embodiment, the flange portion 20 provided in the sheath tube 12 is fixed to the lower surface of the roof slab 104. For this reason, even when the filler 118 is filled into the through-hole 116, the flange portion 20 can prevent the filler 118 from leaking downward.

  In this embodiment, the sheath tube 12 is disposed in the through hole 116, the filler 118 is filled between the through hole 116 and the sheath tube 12, and then the ventilation tube inserted into the sheath tube 12. 14 and the drain pipe 102 are connected, but it is not necessary to be limited to this. For example, the vent pipe 14 inserted in advance in the sheath pipe 12 is connected to the drain pipe 102 when the sheath pipe 12 is placed in the through hole 116, and then between the through hole 116 and the sheath pipe 12. The filler 118 may be filled. In this case, it is possible to prevent poor bonding due to misalignment or oblique insertion of the tube axis between the vent pipe 12 and the drain pipe 102.

  Moreover, in this Example, the flange part 20 was provided in the outer peripheral surface of the sheath pipe 12, and the position of the sheath pipe 12 was hold | maintained by fixing this flange part 20 to the lower surface of the roof slab 104, However, It is limited to this. As shown in FIG. 10, if the position of the sheath tube 12 can be maintained when the filler 118 is filled into the through-hole 116, the flange portion 20 is provided on the outer peripheral surface of the sheath tube 12. May not be provided.

  For example, after placing concrete in the mold 106 in which the void pipe 114 is disposed, the sheath pipe 12 is placed on the mold 106 as it is, and the filler 118 is filled into the through hole 116 and then the mold 106 is placed. By disassembling, the position of the sheath tube 12 when the filler 118 is filled into the through hole 116 can be maintained without providing the flange portion 20 on the outer peripheral surface of the sheath tube 12. Further, the mold 106 can prevent the filler 118 from leaking downward when the filler 118 is filled into the through hole 116.

  Further, for example, although not shown, a donut plate-like support having an opening in the center is fixed to the lower surface of the roof slab 104, and the sheath tube 12 is placed and fixed on the support so that the through-hole is fixed. You may hold | maintain the position of the sheath tube 12 at the time of the filling of the filler 118 in 116. FIG.

  In each of the above-described embodiments, the sheath tube 12 is formed of a synthetic resin such as vinyl chloride. However, the present invention is not limited to this, and the sheath tube 12 can be formed of a metal such as stainless steel. .

  In each of the above-described embodiments, the rubber ring 18 is attached to the rubber ring groove 16 near the upper end opening of the sheath tube 12, and the inner peripheral portion of the rubber ring 18 is in contact with the outer peripheral surface of the vent pipe 14. Although the space between the sheath tube 12 and the vent tube 14 is sealed by this, it is not necessary to be limited to this.

  For example, as shown in FIG. 11, a rubber ring groove 16 may be formed on the inner peripheral surface near the lower end opening of the sheath tube 12, and a rubber ring 18 may be attached to the rubber ring groove 16. In FIG. 11, the rooftop ventilation device 10 in the embodiment of FIG. 1 is illustrated. However, as shown in FIG. 12, the same applies to the rooftop ventilation device 10 in the embodiment of FIG.

  If the watertightness and airtightness between the sheath tube 12 and the vent tube 14 can be ensured, the sheath tube 12 and the vent tube 14 are formed by the rubber ring 18 attached to the rubber ring groove 16 of the sheath tube 12. Appropriate means can be employed instead of sealing between the two.

  In a rooftop ventilation device 10 which is still another embodiment of the present invention shown in FIG. 13, the space between the sheath tube 12 and the vent tube 14 is sealed by a rubber cover 120 provided at the upper end portion of the sheath tube 12.

  As shown in FIG. 13, the rubber cover 120 is formed in a substantially cylindrical shape by a synthetic rubber such as SBR (styrene butadiene rubber), and covers the outer peripheral surface of the sheath tube 12 and the outer peripheral surface of the vent tube 14. .

  As shown in FIG. 14, the rubber cover 120 includes a main body upper portion 122, a main body middle portion 124, and a main body lower portion 126. The rubber cover 120 has a shape that increases in diameter toward the lower side in this order. The main body middle portion 124 is tightened by the tightening band 48 and is brought into close contact with the outer peripheral surface of the sheath tube 12.

  Further, the main body lower portion 126 of the rubber cover 120 extends downward from the main body middle portion 124 and covers the upper end portions of the waterproof layers 42 and 46 located in the vicinity of the upper end opening of the sheath tube 12. Ingress of water between layers 42 and 46 is prevented.

  The vertical length of the main body lower portion 126 may be set to a predetermined value that allows the construction error of the waterproof layers 42 and 46 to be allowed.

  Further, as shown in FIG. 16, inner surface protrusions 128 projecting inward in the radial direction are formed on the inner peripheral surfaces of the main body upper portion 122 and the main body middle portion 124. The inner surface protruding portion 128 is for increasing the surface pressure (contact pressure) to improve the water tightness with the sheath tube 12 or the vent tube 14, and in this embodiment, the main body upper portion 122 and the main body middle portion 124, respectively. Three inner surface protrusions 128 are formed on the inner peripheral surface of each.

  Furthermore, outer surface protrusions 130 protruding outward in the radial direction are formed on the outer peripheral surfaces of the main body upper portion 122 and the main body middle portion 124. The outer protrusion 130 is for preventing the fastening band 48 from being displaced, and in this embodiment, the outer peripheral surface of the main body upper part 122 and the main body middle part 124 correspond to the length of the fastening band 48 in the vertical direction. Two external projections 130 are formed at a predetermined interval. When the main body upper part 122 or the main body middle part 124 is tightened with the tightening band 48, one external protrusion 130 is located on the upper side and the lower side of the tightening band 48 (see FIG. 15).

  As described above, in this embodiment, the rubber cover 120 covers the outer peripheral surface of the sheath tube 12 and the outer peripheral surface of the vent tube 14, thereby covering the outer peripheral surface of the sheath tube 12 and the outer peripheral surface of the vent tube 14. Since the space is sealed, watertightness and airtightness between the sheath tube 12 and the vent tube 14 can be ensured as in the embodiment of FIG. Therefore, it is possible to prevent water and insects from entering the building 100 through the gap between the sheath pipe 12 and the vent pipe 14.

  Further, in this embodiment, the rubber cover 120 spanning the outer peripheral surface of the sheath tube 12 and the outer peripheral surface of the vent tube 14 is tightened with the tightening band 48 to seal between the sheath tube 12 and the vent tube 14. Compared with the case where the space between the sheath tube 12 and the vent tube 14 is sealed by the rubber ring 18 attached to the rubber ring groove 16 of the sheath tube 12, the insertion resistance and the pull-out resistance of the vent tube 14 into the sheath tube 12 are reduced. As a result, the workability at the time of renewing the ventilation pipe 14 is improved accordingly.

  Further, when the ventilation pipe 14 is inserted into the sheath pipe 12, so-called "rolling" in which the rubber ring 18 is twisted or twisted does not occur, so that the gap between the sheath pipe 12 and the ventilation pipe 14 is securely sealed. be able to.

  Furthermore, even when the rubber cover 120 has deteriorated over time, the rubber cover 120 can be easily replaced.

  Furthermore, in this embodiment, the main body upper portion 122 of the rubber cover 120 is in close contact with the outer peripheral surface of the vent pipe 14, and the main body middle portion 124 of the rubber cover 120 is in close contact with the outer peripheral surface of the sheath tube 12. The main body lower portion 126 covers the upper end portions of the waterproof layers 42 and 46. For this reason, the outer peripheral surface of the sheath tube 12 is not exposed to the outside, and the weather resistance of the sheath tube 12 can be improved. Therefore, deterioration over time of the sheath tube 12 can be suppressed.

  Further, in this embodiment, the main body upper portion 122 of the rubber cover 120 is brought into close contact with the outer peripheral surface of the vent pipe 14 with the tightening band 48, and the main body middle portion 124 of the rubber cover 120 is attached to the outer peripheral surface of the sheath tube 12 with the tightening band 48. Adhere closely. Here, for example, even if the rubber cover 120 is tightened to the waterproof layers 42 and 46 with the tightening band 48, it is difficult to ensure waterproofness because the outer surfaces of the waterproof layers 42 and 46 are not smooth. In this case, since the outer peripheral surfaces of the sheath tube 12 and the vent tube 14 are smooth, the rubber cover 120 can be securely adhered to the sheath tube 12 and the vent tube 14 to ensure water blocking.

  Furthermore, according to this embodiment, since it is not necessary to form the rubber ring groove 16 in the sheath tube 12, the length of the sheath tube 12 can be adjusted at the construction site, for example.

  In this embodiment, the main body lower portion 126 of the rubber cover 120 covers the upper end portions of the waterproof layers 42 and 46. However, the present invention is not limited to this.

  For example, the space between the sheath tube 12 and the vent tube 14 may be sealed by the rubber cover 130 including the main body upper portion 132 and the main body lower portion 134. In this case, as shown in FIG. 17, the main body upper portion 132 of the rubber cover 130 is brought into close contact with the outer peripheral surface of the vent pipe 14 by the tightening band 48, and the main body middle part 134 of the rubber cover 130 is sealed by the tightening band 48. 12 is closely attached to the outer peripheral surface.

  For example, as shown in FIG. 18, the main body upper portion 132 of the rubber cover 130 is brought into close contact with the outer peripheral surface of the vent pipe 14 with the fastening band 48, and the main body lower portion 134 of the rubber cover 130 is crossed over the sheath pipe 12. The outer peripheral surface of the second waterproof layer 46 may be brought into close contact with the fastening band 48.

  Furthermore, although not shown in the drawings, the fastening band 48 is not used to bring the rubber cover 120 into contact with the outer peripheral surface of the sheath tube 12, the outer peripheral surface of the vent tube 14, or the outer peripheral surface of the second waterproof layer 46. An adhesive tape such as butyl rubber is sandwiched between the rubber cover 120 and the sheath tube 12, between the rubber cover 120 and the vent tube 14, and between the rubber cover 120 and the second waterproof layer 46. Thus, the rubber cover 120 may be pressure-bonded to the outer peripheral surface of the sheath tube 12, the outer peripheral surface of the vent tube 14, or the outer peripheral surface of the second waterproof layer 46.

  Further, although not shown, the mounting bracket 24 is fixed to a tightening band 48 for tightening the rubber cover 120, and the vent pipe protection member 26 may be provided at the upper end opening of the vent pipe 14 via the mounting bracket 24. it can.

  Furthermore, in FIG. 13, FIG. 18 and FIG. 19, the space between the sheath pipe 12 and the vent pipe 14 of the rooftop ventilator 10 in the embodiment of FIG. As shown in FIG. 21, the same applies to the rooftop ventilation device 10 in the embodiment of FIG.

  In each of the above-described embodiments, the water-stopping caulking material 112 is applied to the abutting portion between the lower end opening of the sheath tube 12 and the upper end opening of the fiber-mixed mortar tube 108. However, the present invention is not limited to this. Absent.

  For example, as shown in FIG. 22, an O (O) ring-shaped rubber member 122 is provided at the abutting portion between the sheath tube 12 and the fiber-mixed mortar tube 108, and the sheath tube 12 and the fiber-mixed mortar tube 108 are provided by the rubber member 122. The butting part may be stopped. In FIG. 22, the rooftop ventilation device 10 in the embodiment of FIG. 1 is illustrated, but the same applies to the rooftop ventilation device 10 in the embodiment of FIG.

  Further, for example, when no dew condensation occurs between the sheath tube 12 and the vent tube 14, the water-stopping caulking material 112 and the rubber member 122 described above are formed at the abutting portion between the sheath tube 12 and the fiber-mixed mortar tube 108. May not be provided.

  Furthermore, in each of the above-described embodiments, the mounting bracket 24 is fixed to the upper end portion of the vent pipe 14, and the vent pipe protection member 26 that covers the upper end opening of the vent pipe 14 is provided via the mounting bracket 24. However, it need not be limited to this. For example, the attachment fitting 24 may be fixed to the upper end portion of the sheath tube 12, and the ventilation pipe protection member 26 that covers the upper end opening of the ventilation pipe 14 may be provided via the attachment fitting 24.

  Further, in each of the above-described embodiments, the sheath tube 12 is formed in a straight tube shape as a single tube member, but it is not necessary to be limited to this. For example, although not shown, the sheath tube 12 may be formed by combining a plurality of tube members in a straight tube shape. For example, if the sheath tube 12 is formed so as to be split at a height position substantially equal to the upper surface of the roof slab 104, the sheath tube 12 does not protrude above the upper surface of the roof slab 104. For this reason, even if the building 100 is under construction work, the sheath tube 12 does not interfere with other construction work and is excellent in workability.

  Furthermore, in each of the above-described embodiments, the vent pipe 14 is inserted into the fiber-mixed mortar pipe 108 at the lower part of the roof slab 104, but it is not necessary to be limited to this. For example, although illustration is omitted, after the ventilation pipe 14 inserted into the inside of the sheath pipe 12 is connected to the pipe connecting member 110, the circumference of the ventilation pipe 14 is covered with a heat insulating material 124 such as glass wool, so that a fiber mixed mortar is provided. The tube 108 becomes unnecessary. Further, as shown in FIG. 23, the length of the fiber-mixed mortar pipe 108 can be slightly shortened, and only the periphery of the lower end portion of the vent pipe 14 can be covered with the heat insulating material 124.

  Note that the specific numerical values such as the diameter and height described above are merely examples, and can be appropriately changed as necessary.

DESCRIPTION OF SYMBOLS 10 ... Roof ventilator 12 ... Sheath pipe 14 ... Vent pipe 16 ... Rubber ring groove 18 ... Rubber ring 20 ... Flange part 26 ... Vent pipe protection member 42, 46 ... Waterproof layer 44 ... Heat insulation layer 100 ... Building 102 ... Drain pipe 104 ... Roof slab 106 ... Formwork 114 ... Through hole 116 ... Filler 120 ... Rubber cover

Claims (12)

A rooftop ventilation device installed on the top of a drainage pipe disposed in a building having a rooftop slab and taking outside air into the drainage pipe,
A sheath tube that penetrates the roof slab in the vertical direction and is fixed to the roof slab,
A vent pipe inserted into the sheath pipe in a sealed state between the sheath pipe and connected to the drain pipe; and a vent pipe protection member that covers the upper end opening of the vent pipe with a space therebetween. , Roof ventilation device. The roof ventilator according to claim 1, further comprising: a rubber ring groove formed on an inner peripheral surface of the sheath pipe; and a rubber ring attached to the rubber ring groove and contacting the outer peripheral surface of the vent pipe.   The roof top ventilation apparatus according to claim 1, further comprising a rubber cover covering the outer peripheral surface of the upper end portion of the sheath pipe and the outer peripheral surface of the vent pipe.   The rubber cover is composed of a main body upper part, a main body middle part, and a lower main body, the upper part of the main body is in close contact with the outer peripheral surface of the vent pipe, the middle part of the main body is in close contact with the outer peripheral surface of the sheath pipe, and the roof slab The roof ventilation apparatus of Claim 3 with which the said main body lower part covers the upper end part of the waterproof layer formed ranging from the upper surface of this to the outer peripheral surface of the said sheath pipe.   The roof ventilator according to any one of claims 1 to 4, wherein the sheath pipe is disposed via a filler in a through hole that penetrates the roof slab in the vertical direction.   The rooftop ventilator according to any one of claims 1 to 5, further comprising a flange portion that is fixedly provided on an outer peripheral surface of the sheath tube and projects outward in a radial direction of the sheath tube. It is a construction method of the roof ventilator according to any one of claims 1 to 4,
(A) placing a sheath tube in the mold,
(B) Placing concrete in the formwork to form a roof slab in which the sheath pipe is integrally embedded,
(C) a step of inserting a vent pipe into the sheath pipe and connecting the vent pipe to a drain pipe disposed in the building; and (d) an upper end opening of the vent pipe is a vent pipe protection member. A method for constructing a rooftop ventilation device, including a step of covering with a roof. It is a construction method of the roof ventilator according to claim 5,
(A) disposing a sheath tube inside a through-hole penetrating the roof slab vertically;
(B) filling the inside of the through hole with a filler;
(C) inserting a vent pipe into the sheath pipe and connecting the vent pipe and a drain pipe disposed in the building;
(D) A method for constructing a rooftop ventilation apparatus, including a step of covering an upper end opening of the ventilation pipe with a ventilation pipe protection member. It is a construction method of the roof ventilator according to claim 6,
(A) a step of arranging a sheath tube in the mold by fixing the flange portion to the mold;
(B) Placing concrete in the formwork to form a roof slab in which the sheath pipe is integrally embedded,
(C) a step of inserting a vent pipe into the sheath pipe and connecting the vent pipe to a drain pipe disposed in the building; and (d) an upper end opening of the vent pipe is a vent pipe protection member. A method for constructing a rooftop ventilation device, including a step of covering with a roof. It is a construction method of the roof ventilator according to claim 6,
(A) a step of disposing a sheath tube inside a through-hole penetrating the roof slab in the vertical direction by fixing a flange portion to the lower surface of the roof slab;
(B) filling the inside of the through hole with a filler;
(C) inserting a vent pipe into the sheath pipe and connecting the vent pipe and a drain pipe disposed in the building;
(D) A method for constructing a rooftop ventilation apparatus, including a step of covering an upper end opening of the ventilation pipe with a ventilation pipe protection member.   Before the step (a), placing a void pipe in the mold, placing concrete in the mold to form a roof slab in which the void pipe is integrally embedded, and The construction method according to claim 8 or 10, further comprising a step of disassembling the void pipe to form a through hole penetrating the roof slab in the vertical direction. A sheath pipe that passes through the roof slab in the vertical direction and is fixed to the roof slab, and is inserted between the sheath pipe in a sealed state and connected to a drain pipe disposed in the building. And a method for renewing a vent pipe of a rooftop ventilator comprising a vent pipe protection member that covers an upper end opening of the vent pipe at an interval,
(A) removing the vent pipe protection member covering the upper end opening of the vent pipe;
(B) extracting the vent pipe from the sheath pipe;
(C) inserting a new vent pipe into the sheath pipe;
(D) A method for renewing a vent pipe, comprising the step of covering an upper end opening of the new vent pipe with the vent pipe protection member.

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