JP6745710B2 - Roof slab penetration unit - Google Patents

Description

The present invention relates to a rooftop slab penetration unit, for example, to a rooftop slab penetration unit that is installed and used on a rooftop when pipes and wiring inside a building are taken out to the rooftop through a penetration path of the rooftop slab.

In buildings such as condominiums and buildings, piping, wiring, etc. that connect the inside of the building and the rooftop are installed. For example, when installing an air conditioner such as an air conditioner, the indoor unit is installed inside the building, while the outdoor unit is installed on the roof of the building, and the indoor unit and the outdoor unit are connected by piping.
Therefore, the roof slab of the building is provided with a through passage (outlet) for taking out the pipe from the inside of the building to the roof, and rainwater does not enter the inside of the building from the through passage, for example, There is provided a rooftop slab penetration unit that covers the penetration path as shown in Patent Documents 1 and 2.

This rooftop slab penetrating unit will be described with reference to FIGS. 12 and 13 by taking the rooftop pipe extraction box shown in Patent Document 1 as an example.
This roof pipe extraction box 100 is a concrete lower frame 101 installed on a roof slab, an upper frame 102 attached to the concrete lower frame 101, and an upper surface of the upper frame 102. And a lid member 103 to be attached.

The lower frame body 101 is formed with a flange portion 101a protruding outward from a lower end edge of a main body having a rectangular frame shape in cross section. The flange portion 101a is for mounting a supporting metal fitting (not shown) at the time of installation on a slab. A through hole 101b used as is provided.
Further, as shown in FIG. 13, a first connecting portion 101c is formed on the upper surface of the lower frame body 101 so as to project inward from the upper edge. A screw hole portion 101d is formed in the first connecting portion 101c.

Further, the upper frame 102 is formed to be slightly larger than the outer size of the lower frame 101, and a connecting portion 102a extending inward is formed in the lower portion of the upper frame 102. The connecting portion 102a is provided with a bolt insertion hole 102b.
Then, the upper portion of the lower frame body 101 is housed in the lower portion of the upper frame body 102, and the bolt inserted through the bolt insertion hole 102b is screwed into the screw hole portion 101d, whereby the upper frame body 102 and the lower frame body 101 is connected.

Further, a second connecting portion 102c extending outward is formed on the upper portion of the upper frame body 102. The second connecting portion 102c is provided with a bolt insertion hole 102d.
Although not shown, a through hole for leading out the pipe to the outside is formed on the side surface of the upper frame 102.

Further, the lid member 103 is formed with a bolt insertion hole 103a.
By placing the lid 103 on the upper frame 102, inserting bolts (not shown) into the bolt insertion holes 103a and 102d, and screwing with a nut (not shown), the lid 103 is placed at the upper part. It is connected to the frame body 102.

The installation of the rooftop pipe take-out box 100 thus configured will be described.
After arranging the roof slab, the lower frame body 101 is arranged so as to surround the through passage on the roof slab bar arrangement, and at that time, a supporting metal fitting (not shown) fixed to the through hole 101b is provided on the slab formwork. Secure with nails.
Next, the second connecting portion 102a of the upper frame body 102 is placed on the first connecting portion 101c of the lower frame body 101 so as to overlap with each other, and the tightening bolt is inserted into the screw hole portion 101d through the bolt insertion hole 102b. The lower frame body 101 and the upper frame body 102 are connected by screwing.

Then, the pipe that has passed through the through path of the rooftop slab is bent by an elbow or the like and taken out through the through hole of the upper frame 102 to the outside. After that, the upper frame 102 is covered with the lid 103, and the bolt insertion holes 103a and 102d provided on both sides are inserted with tightening bolts (not shown), and tightened with nuts (not shown) to be fixed.

Further, generally, a waterproof sheet (asphalt waterproof layer) is installed on the side wall of the lower frame 101 and the flange portion 101a at the lower end edge to prevent rainwater from entering.
As shown in phantom lines in FIG. 12, this waterproof sheet has a first waterproof sheet 104a corresponding to the long side of the lower frame 101, a second waterproof sheet 104b corresponding to the short side, and a corner portion. It is composed of a corresponding third waterproof sheet 104c.
Then, as shown in FIG. 13, by installing the respective waterproof sheets 104a, 104b, 104c between the side wall of the lower frame 101 and the roof slab, the waterproof treatment between the flange portion 101a and the roof slab is performed. Given.

JP, 2015-14178, A JP, 2005-78746, A

By the way, regarding construction of a building , based on the public construction standard specification of the Ministry of Land , Infrastructure, Transport and Tourism, the Japanese Architectural Institute has established the Japanese Architectural Standard Specification (hereinafter referred to as JASS).
In this building construction standard specification, waterproofing work on the roof and roof is specified in JASS8 (Chapter 8 of building construction standard specification), and waterproof sheets (eg modified asphalt sheet, synthetic polymer sheet) When waterproofing the rooftop slab penetration unit by using the lower frame 101 (lower unit), the corners are required to be right angles. The entry corner is a concave continuous line formed by the rising surface and the horizontal surface meeting each other.

In the conventional roof pipe extracting box 100, as shown in FIG. 13, the concave portion formed by the side wall of the lower frame 101 and the flange portion 101a meeting is a curved surface R, so that it is defined by JASS8. The entered corners are not right angles.
In order to meet the JASS8 standard regarding the right angle of the entering corner, it is possible to increase the slab embedding amount and embed the flange portion 101a in the slab to form a right angle, but the work becomes complicated and the rising height is increased. It is feared that it will be difficult to secure sufficient

Further, in the conventional rooftop pipe extraction box 100, since the flange portion 101a is formed, when installing on the existing rooftop slab surface, there is a step between the rooftop slab surface and the upper surface of the flange portion 101a. Occurs.
Therefore, the work of constructing the waterproof sheet without a gap between the roof slab surface, the flange portion, and the lower frame body 101 (lower unit) was complicated.

Further, it is desirable to install a protective plate on the outside of the waterproof layer (waterproof sheet) to protect the waterproof layer from deterioration and floating caused by direct sunlight and maintain its aesthetic appearance. In that case, since the flange portion 101a is formed, there is no space for installing the protective plate of the waterproof layer, and the installation thereof is difficult.

The present invention has been made in order to solve the above technical problems, and the standard of JASS8 is used both when installing in a bar arrangement before forming a roof slab and when installing on an existing roof slab. It is an object of the present invention to provide a rooftop slab penetrating unit in which waterproofing conforming to the above can be easily performed and a waterproof layer (waterproof sheet) protective plate can be installed.

The rooftop slab penetrating unit according to the present invention made to achieve the above object includes a lower unit having upper and lower portions opened, and an intermediate unit having upper and lower portions which are installed on the lower unit. An upper unit that closes the opening in the upper portion of the intermediate unit, the sidewall not being provided inward from the lower end of the side wall of the lower unit without providing a flange portion protruding outward from the lower end of the side wall of the lower unit. Is provided with a leg portion extending at a right angle with respect to the lower unit, and the lower corner of the side wall of the lower unit and the corner of the roof slab are at a right angle .
The right angle does not necessarily mean an accurate 90 degrees, but may be formed at about 90 degrees. For example, a corner of the side wall and the leg may be chamfered due to processing. In the case of molding with a die, a side wall or a leg is provided with a draft (draft angle) for demolding. The right angle is a range of angles including these cases.

As described above, the rooftop slab penetration unit according to the present invention has the leg portion extending inward from the lower end of the side wall of the lower unit, at a right angle to the side wall, so that the entering corner becomes a right angle, and It is possible to meet the standards of JASS8 described above without complicated work.
Further, in the rooftop slab penetration unit according to the present invention, since the flange portion is not formed unlike the conventional rooftop pipe extraction box, there is no step between the rooftop slab surface and the upper surface of the flange portion. Even when installing on the existing rooftop slab surface, the work of installing the waterproof sheet can be easily performed.
Also, unlike the conventional roof pipe extraction box, the flange is not formed, so there is a space to install a protective plate to protect the waterproof layer (waterproof sheet) on the outside of the side wall of the lower unit. And can be easily installed.

Here, it is preferable that a plurality of ribs extending in the vertical direction of the side wall be provided at predetermined intervals in the circumferential direction of the inner surface of the side wall of the lower unit.
Thus, since the inner peripheral surface of the side wall of the lower unit is provided with the plurality of ribs, the mechanical strength of the lower unit can be improved. That is, since the effective cross-sectional area is increased by the plurality of ribs, it is possible to improve water pressure resistance, shear strength, and the like.

The lower unit may include a plurality of ribs extending from an upper surface of the leg portion to an upper end of the side wall at a predetermined interval in a circumferential direction of an inner surface of a side wall of the lower unit, and at least a plurality of the ribs. A fixing portion provided on an upper portion of the rib of the intermediate unit, the intermediate unit being fixed to the fixing portion provided on the leg portion and a leg portion extending inward from a lower end of the intermediate unit side wall. It is desirable to have a fixed part.
In this way, the intermediate unit is fixed (coupled) to the lower unit by the fixed portion provided on the rib of the lower unit and the fixed portion provided on the leg of the intermediate unit.

Further, it is preferable that the intermediate unit includes a collar extending outward from a lower end of the side wall.
As described above, since the flange extending outward is provided at the lower end of the side wall of the intermediate unit, rainwater can be prevented from entering from the joint surface between the lower unit and the intermediate unit.

In addition, it is desirable that a lower surface of the flange of the intermediate unit be provided with a recess in which a waterproof layer protection plate is mounted.
As described above, since the lower surface of the collar of the intermediate unit has the recess, it is possible to easily attach the waterproof layer protection plate for protecting the waterproof layer.

The lower unit may include a flange extending outward from an upper end of a side wall of the lower unit and a circumferential direction of an inner surface of the side wall of the lower unit at a predetermined interval from an upper surface of the leg portion to an upper end of the side wall. Provided with a plurality of ribs and a fixing portion provided on the flange, the intermediate unit is provided on the flange, the flange extending outward from the lower end of the side wall, It is desirable to provide a fixed part connected to the fixed part.
In this case, the intermediate unit is fixed (connected) to the lower unit by the fixed portion provided on the flange of the lower unit and the fixed portion provided on the flange of the intermediate unit.

Further, at least the lower unit among the lower unit, the intermediate unit, and the upper unit is made of concrete containing an aggregate and an organic admixture, or fiber reinforced concrete mixed with fibers, and the heat of the peripheral member It is desirable from the viewpoint of small difference in physical properties such as expansion coefficient and cost reduction.

ADVANTAGE OF THE INVENTION According to this invention, even when installing in a bar arrangement before forming a rooftop slab, and also when installing on an existing rooftop slab, waterproof construction conforming to the JASS8 standard can be easily performed, and a waterproof layer (Waterproof sheet) It is possible to obtain a rooftop slab penetration unit that enables installation of a protective plate.

FIG. 1 is a schematic view showing a rooftop slab penetration unit according to a first embodiment of the present invention, (a) is a schematic perspective view of a rooftop slab penetration unit, and (b) is a schematic perspective view of a lower unit. Is. FIG. 2 is a half sectional view of the roof slab penetration unit according to the first embodiment shown in FIG. 1 in an installed state. FIG. 3 is a partial cross-sectional view of the lower unit shown in FIG. FIG. 4 is a cross-sectional view of a joint surface portion of the lower unit and the intermediate unit shown in FIG. FIG. 5 is a plan view of the lower unit shown in FIG. FIG. 6 is a cross-sectional view showing a state in which the pipes are arranged in the first embodiment. FIG. 7 is a half sectional view showing the second embodiment. FIG. 8 is a partial cross-sectional view of the intermediate unit shown in FIG. FIG. 9: is sectional drawing which shows the outline which shows the rooftop slab penetration unit concerning the 3rd Embodiment of this invention. FIG. 10 is a half sectional view showing the fourth embodiment. FIG. 11 is a half sectional view showing the fifth embodiment. FIG. 12 is a perspective view showing a conventional rooftop slab penetration unit. FIG. 13 is a sectional view of FIG.

(First embodiment)
A first embodiment of a rooftop slab penetration unit according to the present invention will be described with reference to FIGS. 1 to 6.
As shown in FIGS. 1 and 2, the rooftop slab penetration unit 1 includes a lower unit 2 having an upper portion 2a and a lower portion 2b opened, and an upper portion 3a and a lower portion 3b installed on the lower unit 2. The intermediate unit 3 and the upper unit 4 that closes the upper surface of the intermediate unit 3 are provided.

The lower unit 2 also has leg portions 2d extending inward from the lower end of the side wall 2c. The leg 2d is formed at a right angle to the lower end of the side wall 2c.
The right angle does not necessarily mean an accurate 90 degree (geometric right angle) as described above, but it has an angle range necessary for processing and manufacturing, and is formed at about 90 degrees. It should be done.

The opening of the lower portion 2b of the lower unit 2 is formed by the inner peripheral surface 2d1 of the leg portion 2d. Further, the inner peripheral surface 2d1 of the leg portion 2d is formed in a size and shape that matches the outer periphery of the through passage T provided in the rooftop slab 60.

Further, as shown in FIGS. 3 and 5, the leg portion 2d of the lower unit 2 is provided with a plurality of through holes 2e. The roof slab penetration unit 1 is fixed to the roof slab 60 by inserting the bolts 51 into these through holes 2e and screwing the bolts 51 to the level anchor 50. The rooftop slab 60 is made of concrete, for example.

In this way, the rooftop slab penetration unit 1 has the leg portions 2d extending inwardly from the lower end of the side wall 2c of the lower unit 2 at a right angle to the side wall 2c, and thus the rooftop slab penetration unit 1 ( The lower unit 2) has a right-angled corner, which meets the above-mentioned JASS8 standard.

Further, as shown in FIGS. 1, 2, and 5, a plurality of ribs 2f are formed at predetermined intervals in the circumferential direction of the inner surface of the side wall 2c of the lower unit 2. The rib 2f extends from the upper surface of the leg portion 2d to the upper end of the side wall 2c.
The width 2f1 of the rib may be smaller than the width 2f2 of the recess between the ribs 2f as shown in FIG. 5, or may be larger than the width of the recess 2f2.

The cross-sectional shape of the rib 2f may be any of a semicircular shape, a rounded corner shape, a rectangular shape, and a trapezoidal shape in plan view. Preferably, as shown in FIG. 5, the rib 2f has a trapezoidal cross-section, and the rib 2f becomes narrower from the bottom to the upper side (the cross-section becomes smaller). It is preferable because it is easy.

As described above, by providing the plurality of ribs 2f on the inner surface of the side wall 2c of the lower unit 2, the mechanical strength of the lower unit 2 can be improved. That is, since the effective cross-sectional area is increased by the plurality of ribs 2f, it is possible to improve the water pressure resistance, the shear resistance and the like of the lower unit 2.

An insert nut 2g is provided on at least a plurality of ribs 2f among the ribs 2f.
The insert nut 2g is provided by embedding (insert molding) a cylindrical body having an internal thread formed on its inner peripheral surface when the lower unit 2 is formed. The insert nut 2g is made of resin or metal.
Instead of providing the insert nut 2g, it is also possible to adopt a configuration in which bolts are embedded (insert molding) above the plurality of ribs 2f. The number of the insert nut 2g or the bolt provided on the upper portion of one rib 2f may be one, or a plurality thereof may be provided.

The lower unit 2 is made of concrete material.
The material for this concrete includes general cement and aggregate such as gravel and organic admixture (acrylic emulsion, water reducing agent, polymer thickener, etc.), and organic fiber (polyolefin fiber, Examples of the fiber-reinforced concrete include vinyl fibers) and inorganic fibers (glass fibers, rock wool, etc.) mixed and reinforced.
Further, as the material of the lower unit 2, FRP, which is a composite material in which fibers such as glass fibers are put in plastic to improve the strength, may be used.

Further, the leg portion 2d is provided at the lower portion of the lower unit 2 as described above, but at the upper portion of the lower unit 2, the first connecting portion 101c of the conventional roof pipe extraction box is provided. Such an inwardly extending connecting portion (overhanging portion) is not provided.
Providing an overhanging portion and a leg portion 2d extending in the same direction (inward) on the upper and lower portions of the lower unit 2 complicates the shape of the mold and the molding process when molding with concrete material or the like. Not preferable.

As shown in FIGS. 2 to 4, the intermediate unit 3 includes a side wall 3c and a leg portion 3d extending inward from the lower end of the side wall 3c. The side wall 3c is sized and shaped so as to be located on the side wall 2c of the lower unit 2.
Since the side wall 3c of the intermediate unit 3 is located on the side wall 2c of the lower unit 2 in this way, the load from the intermediate unit 3 acts on the side wall 2c of the lower unit 2. Since the rib 2f is provided as described above, the rib 2f is configured to sufficiently withstand the load.

Further, as shown in FIGS. 3 and 4, the leg portion 3d is formed with a through hole 3e into which the bolt B is inserted. Therefore, the bolt B is inserted from the intermediate unit 3 side into the through hole 3e, screwed into the insert nut 2g, and the intermediate unit 3 is connected (fixed) to the lower unit 2.
When bolts (insert bolts) are provided on the upper portions of the plurality of ribs 2f, the bolts are inserted into the through holes 3e, and nuts are screwed onto the bolts from the intermediate unit 3 side to attach the bolts to the lower unit 2. The intermediate unit 3 is connected (fixed).

A flange 3f is formed on the lower portion of the side wall of the intermediate unit 3. This flange 3f is formed so as to project to the upper side of the lower unit 2 and to cover the joint surface S between the lower unit 2 and the intermediate unit 3 (the surface where the lower unit 2 and the intermediate unit 3 are in contact).
As described above, the collar 3f covers the joint surface S between the lower unit 2 and the intermediate unit 3, whereby rainwater can be prevented from entering from the joint surface S.

Further, as shown in FIG. 2, the upper portion of the side wall 3c of the intermediate unit 3 has a flange 3g extending outward. The flange 3g is provided with a screw hole 3g1 for fixing the upper unit 4.
The intermediate unit 3 can be formed of not only the same material as the lower unit 2 but also lightweight concrete, lightweight cellular concrete, or the like.

As shown in FIGS. 1 and 2, the upper unit 4 is a member that closes the opening of the upper portion 3a of the intermediate unit 3, is formed in a rectangular shape in plan view, and has a through hole in its outer periphery. 4b is provided.
Then, the screw 4a is inserted through the through hole 4b of the upper unit 4, and the screw 4a is screwed into the screw hole 3g1, whereby the upper unit 4 is attached (fixed) to the intermediate unit 3.

The upper unit 4 may be made of metal such as various steel materials, or FRP which is a composite material in which fibers such as glass fibers are put in plastic to improve the strength.
The lower unit 2, the intermediate unit 3, and the upper unit 4 may be formed by using the same material such as FRP, or the lower unit 2 may be formed by a concrete material and the intermediate unit 3, The lower unit 2, the intermediate unit 3, and the upper unit 4 may be made of different materials, as in the case where the upper unit 4 is made of an FRP material.

Further, as shown in FIG. 4, the side wall 2c of the lower unit 2 is provided with a waterproof layer 5 including a waterproof sheet 5A and an adhesive layer 5B formed on the back surface of the waterproof sheet 5A.
The waterproof layer 5 is not limited to the torch method and the room temperature adhesive method, but a waterproof sheet (modified asphalt sheet [for non-exposed multilayer waterproofing]) is used to melt the asphalt for waterproofing work with heat. Alternatively, a "thermal method" of attaching a waterproof sheet may be used.
By providing this waterproof layer 5, rainwater can be prevented from entering even when the lower unit 2 is made of a concrete material.
The waterproof layer 5 is pressed against the side wall 2c by the pressing member 6, and is attached to the upper end of the side wall 2c of the lower unit 2 with the screw 7b via the attachment 7a. An L-shaped stainless steel angle is used as the attachment 7a.

Further, a filling layer 8 is provided between the waterproof layer 5 at the upper end of the side wall 2c of the lower unit 2 and the brim 3f. As the filling layer 8, for example, a gum seal is used. By providing the filling layer 8 in this manner, the waterproofness of the joint surface S between the lower unit 2 and the intermediate unit 3 can be improved.

Further, when the waterproof layer 5 is provided along the outer surface of the side wall 2c of the lower unit 2 from the surface of the roof slab 60 to the upper end portion of the side wall 2c, the boundary portion between the roof slab 60 and the side wall 2c is substantially a right angle. Therefore, a gap may be formed at the boundary portion, and the waterproof function may be weakened.
In order to suppress the deterioration of the waterproof function, the mortar 9 is provided as shown in FIGS. In this case, a waterproof sheet (modified asphalt sheet [for non-exposed multi-layer waterproof]) is used, the asphalt for waterproofing work is melted by heat, and the "thermal method" of attaching the waterproof sheet is used. Meets JASS8 standards.

Further, for example, a heat insulating material 10 is provided on the upper surface of the waterproof layer 5 on the rooftop slab 60 so as to be in close contact with the waterproof layer 5.
Furthermore, a protective concrete 11 made of, for example, cinder concrete is formed on the upper surface of the heat insulating material 10. Further, a molding cushioning material 12 is provided between the protective concrete 11 and the waterproof layer 5.
As the heat insulating material 10, for example, a resin foam heat insulating material board, an inorganic powder mixed resin foamed heat insulating board, an inorganic fiber mixed resin foamed heat insulating board, a foamed rubber sheet, a foamed calcium silicate board, a styrene foam bead-containing mortar, or the like is used. The material can be used.

Further, as shown in FIG. 6, by providing the through hole 3h of the pipe 16 in the intermediate unit 2 so that the pipe 16 faces downward, rainwater adhering to the pipe 16 or water condensed inside is naturally flowed down, and the roof slab is Intrusion into the penetrating unit 1 can be prevented.

(Second embodiment)
Next, the second embodiment will be described with reference to FIGS. The same or corresponding members as those shown in FIGS. 1 to 6 are designated by the same reference numerals, and detailed description thereof will be omitted.
This embodiment is characterized in that a waterproof layer protection plate 14 for protecting the waterproof layer 5 is provided so as to surround the lower unit 2.
The waterproof layer protection plate 14 is attached by a recess 3f1 provided on the lower surface of the collar 3f of the intermediate unit 3 and a fixture 15 having a recess provided on the protective concrete 11.

Therefore, the waterproof layer protection plate 14 is erected by the recess 3f1 and the fixing fitting 15 and surrounds the lower unit 2 to protect the waterproof layer 5 provided on the lower unit 2. be able to.
In addition, between the four waterproof layer protective plates 14 (not shown) provided so as to surround the periphery (side surface) of the lower unit 2, between the waterproof layer protective plate 14 and the recess 3f1, and between the waterproof layer protective plate 14 and the fixing bracket. It is preferable to form the filling layer 8 between 15 to enhance the hermeticity (sealability).

The waterproof layer protection plate 14 is formed by molding a concrete material. The material of this concrete is the same as the material of the lower unit 2, that is, the cement and the aggregate such as gravel and the organic admixture (acrylic emulsion, water reducing agent, polymer thickener, etc.). Further, fiber reinforced concrete or the like in which organic fibers (polyolefin fibers, vinyl fibers, etc.) and inorganic fibers (glass fibers, rock wool, etc.) are mixed and reinforced can be used.
Further, as the material of the waterproof layer protection plate 14, FRP which is a composite material in which fibers such as glass fibers are put in plastic to improve the strength may be used.

(Third Embodiment)
Next, a third embodiment of the rooftop slab penetration unit according to the present invention will be described with reference to FIG. The same or corresponding members as those shown in FIGS. 1 to 6 are designated by the same reference numerals, and detailed description thereof will be omitted.
The rooftop slab penetration unit 20 according to the third embodiment has leg portions 21b extending inward from the lower end of the side wall 21a of the lower unit 21 and outward extending from the upper end of the side wall 21a of the lower unit 21. It is characterized in that it has a collar 21c and a screw hole 21c1 into which a bolt B provided on the collar 21c is screwed.

In this way, the leg portion 21b and the collar 21c are formed in the inner and outer opposite directions with respect to the side wall 21a. Therefore, even when the lower unit 21 is molded with a concrete material, the shape of the mold and the molding It can be molded without complicating the process.
The rib 2f shown in the first embodiment is not provided in the third embodiment. Therefore, although not shown, in order to increase the mechanical strength of the lower unit 21, the side wall 21a may be formed so that the thickness thereof does not gradually decrease from the lower end to the upper end.

In addition, the intermediate unit 22 includes a first flange 22b extending outward from the lower end of the side wall 22a and a fixing portion 22c formed in the first flange 22b and having a through hole 22c1. Is characterized by. The upper surface of the fixing portion 22c is formed into a flat surface to prevent the bolt B from tilting when tightened.

The intermediate unit 22 also includes a second flange 22d extending outward from the upper end of the side wall 22a, and a fixing portion 22e formed in the second flange 22d and having a screw hole 22e1. Further, the upper unit 23 includes a fixed portion 23a having a through hole 23b, and the through hole 23b is formed in an oval shape extending in the outer peripheral direction in plan view.
As described above, since the through hole 23b is formed in an oval shape extending in the outer peripheral direction in a plan view, even when the through hole 23b and the screw hole 22e1 are positioned, the upper unit 23 and the intermediate unit 22 are not positioned. Can be easily connected (fixed) to.

By forming the step S1 on the joint surface S between the lower unit 21 and the intermediate unit 22, it is possible to further suppress the intrusion of water into the roof slab penetration unit 20.

Also in the third embodiment, as in the first embodiment, the leg portion 21b extends inward from the lower end of the side wall 21b of the lower unit 21, so that the rooftop slab penetration unit 20 (lower unit The shape of 21) has a right-angled corner and satisfies the above-mentioned JASS8 standard.
Also, unlike the conventional flange on the rooftop pipe extraction box, there is no overhanging part that extends outward, so there is no step, and even when installing on the existing rooftop slab surface, the waterproof sheet construction work is required. It can be done easily.
Further, since the lower surface of the collar 22b of the intermediate unit 22 is provided with the recess 22f into which the waterproof layer protective plate 14 is mounted, the waterproof layer protective plate 14 for protecting the waterproof layer 5 can be easily mounted. ..

(Fourth Embodiment)
Next, a fourth embodiment will be described based on FIG. The same or corresponding members as those shown in FIGS. 1 to 8 are designated by the same reference numerals, and detailed description thereof will be omitted.
In the above-described second embodiment, the waterproof layer protection plate 14 is attached by the recess 3f1 provided on the lower surface of the collar 3f of the intermediate unit 3 and the fixture 15 having the recess provided on the protective concrete 11. The case has been explained.

In the rooftop slab penetration unit 30 according to the fourth embodiment, a guard case 31 is attached to the lower surface of the collar 3f of the intermediate unit 3 with a screw 32 so that the guard case 31 holds the upper end portion of the waterproof layer protection plate 14. Is configured. A filling layer 8 is formed between the waterproof layer protection plate 14 and the guard case 31 for waterproofing.

In the fourth embodiment configured in this way, the guard case 31 can be easily removed from the intermediate unit 3, and by removing the guard case 31, the waterproof layer protection plate 14 can be easily replaced. can do.
Moreover, since the guard case 31 is provided (in order to exhibit the same function as that of the collar 3f1 of the second embodiment), the intrusion of water into the joint surface S of the intermediate unit 3 and the lower unit 2 is suppressed. You can

(Fifth Embodiment)
Next, a fifth embodiment will be described based on FIG. The same or corresponding members as those shown in FIGS. 1 to 8 are designated by the same reference numerals, and detailed description thereof will be omitted.
The fifth embodiment is characterized in that the eaves portion 35 is provided outside the side wall above the through hole 3h of the intermediate unit 3 in the first embodiment. The eaves portion 35 is fixed to the intermediate unit 3 by inserting the bolt B into the through hole 3j provided in the intermediate unit 3 and screwing the bolt B and the nut N.
In this way, when the eaves portion 35 is provided, it is possible to prevent water from entering the inside of the rooftop slab penetration unit from between the through hole 3h, the through hole 3h, and the pipe 16.

Although the pipes have been described as an example in the first to fifth embodiments, the pipes include an exhaust duct, an electric/communication cable duct, an exhaust pipe of a boiler, a ventilation pipe of a sewer pipe, and the like. In addition, the present invention does not necessarily need to provide piping, and a lighting window (a rooftop slab penetration unit whose upper unit is made of a transparent material) and a ventilation hole (no piping inside, a through hole is formed in the side wall of the intermediate unit). It can also be used as a rooftop slab penetration unit).

1 Rooftop slab penetration unit 2 Lower unit 2a Upper part 2b Lower part 2c Side wall 2d Leg part 2e Through hole 2f Rib 2g Insert nut (fixed part)
3 Intermediate unit 3a Upper part 3b Lower part 3c Side wall 3d Leg part 3e Through hole (fixed part)
3f Tsuba 3g Tsuba 4 Upper unit 5 Waterproof layer 5A Waterproof sheet 6 Pressing member 10 Insulation material 11 Protective concrete 14 Waterproof layer protective plate 15 Fixing bracket 20 Roof slab penetration unit 21 Lower unit 21a Side wall 21b Leg 21c Tsuba 21c Intermediate screw hole Unit 22a Side wall 22b First flange 22c Fixed part 22c1 Through hole 22d Second flange 22e Fixed part 23 Upper unit 23a Fixed part 23b Through hole 35 Eaves 50 Level anchor 60 Slab (rooftop slab)

Claims (7)

A lower unit with an open top and bottom,
An intermediate unit having an upper opening and a lower opening, which is installed on the lower unit;
An upper unit that closes the opening above the intermediate unit,
Equipped with
Without providing a flange portion protruding outward from the lower end of the side wall of the lower unit, the leg portion extending inward from the lower end of the side wall of the lower unit is provided at a right angle to the side wall ,
A roof slab penetrating unit, wherein the lower corner of the side wall of the lower unit and the corner of the roof slab are at right angles . The rooftop slab penetrating unit according to claim 1, further comprising a plurality of ribs extending in the vertical direction of the side wall at predetermined intervals in the circumferential direction of the inner surface of the side wall of the lower unit. The lower unit is
A plurality of ribs extending from the upper surface of the leg portion to the upper end of the side wall at a predetermined interval in the circumferential direction of the inner surface of the side wall of the lower unit,
A fixing portion provided on at least a plurality of ribs of the ribs,
Equipped with
The intermediate unit is
A leg extending inward from the lower end of the intermediate unit side wall,
A fixed portion provided on the leg portion and fixed to the fixing portion;
The roof slab penetration unit according to claim 1, further comprising: The rooftop slab penetrating unit according to claim 3, wherein the intermediate unit further includes a collar extending outward from a lower end of the side wall. The roof slab penetrating unit according to claim 4, wherein a lower surface of the brim of the intermediate unit is provided with a recess in which a waterproof layer protection plate is mounted. The lower unit is
A collar extending outward from the upper end of the side wall of the lower unit,
A plurality of ribs extending from the upper surface of the leg portion to the upper end of the side wall at a predetermined interval in the circumferential direction of the inner surface of the side wall of the lower unit,
A fixing portion provided on the collar,
Equipped with
The intermediate unit is
A flange that extends outward from the lower end of the side wall, and a fixed portion that is provided on the flange and that is connected to the fixing portion,
The rooftop slab penetration unit according to claim 1, further comprising: At least the lower unit among the lower unit, the intermediate unit, and the upper unit is made of concrete containing an aggregate and an organic admixture, or fiber reinforced concrete mixed with fibers. Item 10. The rooftop slab penetration unit according to any one of Items 5.

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