JP6820906B2 - Drainage piping structure - Google Patents

Description

The present invention relates to a drainage pipe structure provided in the lowest floor of multi-storey buildings.

Buildings such as multi-story apartments and hotels usually have drainage collective joints that connect vertical pipes for drainage from each floor and horizontal branch pipes for drainage from dwelling units on each floor. It is provided. Moreover, in recent years, the adoption of the lowest floor merging system that merges the drainage of the lowest floor dwelling unit into the vertical pipe is increasing. In the case of this bottom floor merging system, the collective joint installed on the bottom floor is usually connected to the horizontal main pipe arranged under the bottom floor slab via an elbow-shaped leg joint.

For example, Patent Document 1 describes a branch pipe connection located between an upper pipe connection portion which is a drainage inlet, a lower pipe connection portion which is a drainage outlet, and an upper pipe connection portion and a lower pipe connection portion. Disclosed is a drainage collective joint including a water collecting chamber through which drainage from a connection portion for an upper pipe and a connection portion for a branch pipe flows in, and a connection portion for an upper pipe and a connection portion for a lower pipe are integrally formed.

Japanese Patent No. 4471712

By the way, according to the above-mentioned Patent Document 1, the lower pipe connection portion is cut from the lower end at an appropriate place to shorten the size, and the connection distance with the leg joint is shortened, thereby lowering the lowermost floor slab. It is said that the fit when the horizontal main pipe is connected via the leg joint on the side can be made compact.

However, in Patent Document 1, when the lower pipe connection portion is to be extended when the slab thickness of the lowermost floor slab is thick, the upper pipe connection portion and the lower pipe connection portion are integrally formed, so that the water is drained. There is a problem that the entire collective joint must be manufactured separately, which increases the manufacturing cost.

Further, for example, when the horizontal main pipe is piped close to the lower surface of the lowermost floor slab, the upper end of the leg joint is located just near the lower surface of the lowermost floor slab, but in Patent Document 1, it is the lowest. It is necessary to connect the lower pipe connection part and the leg joint in the floor slab (inside the through hole formed in the lowest floor slab). However, when the connection work is performed in the lowermost floor slab, it becomes difficult to confirm whether or not the connection part for the lower pipe and the leg joint are securely connected, and there is anxiety about problems such as water leakage. There is.

The present invention has been made in view of the foregoing, it is an object of Oite the drain pipe structure provided in the lowest floor slab, the slab thickness of bottom floor slab while suppressing an increase in cost The purpose is to provide technology that facilitates construction management while improving the fit of pipes accordingly.

In order to achieve the above object, in the drainage pipe structure according to the present invention, the collective joint and the leg joint are connected via a vertical pipe that is separate from the collective joint, and the collective joint and the vertical pipe are slabs. Instead of connecting directly inside, the collective joint and the vertical pipe are connected via a connecting joint having a socket that can be inserted from above the slab.

Specifically, the present invention is intended for a drainage pipe structure provided on the lowest floor slab.

Then, at least a part of this drainage pipe structure is embedded in the lowermost floor slab, and is arranged under the resin connecting vertical pipe having a cylindrical outer shape and the lowermost floor slab, and the lower end of the connecting vertical pipe. A curved tubular resin leg joint to be connected to the pipe, and the upper end of the connecting vertical pipe is connected to the lower receiving portion of the connecting joint which is cutable and has a lower receiving portion. It is possible that the connecting vertical pipe and the leg joint are integrated by an adhesive joint that is previously adhesively joined, and the adhesive joint between the connecting vertical pipe and the leg joint is at the bottom. It is characterized by being buried in the floor slab.

According to this configuration, the lower connection portion of the collective joint and the leg joint are not directly connected but are connected via a connecting vertical pipe. Therefore, when the slab thickness of the lowest floor slab is thin, By preparing a short connecting vertical pipe and preparing a long connecting vertical pipe when the slab thickness of the lowest floor slab is thick, it is possible to realize a drainage pipe structure according to the slab thickness of the lowest floor slab. That is, according to this configuration, even if the slab thickness of the lowest floor slab changes, it is not necessary to manufacture a special collective joint, so piping is performed according to the slab thickness of the lowest floor slab while suppressing an increase in manufacturing cost. It is possible to improve the fit of the.

In addition, even if a connecting vertical pipe corresponding to the slab thickness of the lowest floor slab is not prepared, the connecting vertical pipe is cut according to the slab thickness of the lowest floor slab at the construction site to reduce the length of the connecting vertical pipe. By adjusting, the fit of the pipe can be improved. Moreover, since the connecting vertical pipe has a cylindrical outer shape, in other words, the cross-sectional shape does not change regardless of the cutting position, so that the connection with the connecting joint or the leg joint can be easily performed even after cutting. Furthermore, since it is easy facilities Engineering management, it is possible to improve construction quality.

Further, in the drainage pipe structure, the connecting vertical pipe may be a heat-expandable pipe having a three-layer structure having an inner surface layer and an outer surface layer, and an intermediate layer made of a resin composition containing heat-expandable graphite. preferable.

According to this configuration, in the event of a fire or the like, the connecting vertical pipe expands to form a refractory layer in the through hole formed in the lowermost floor slab, so that heat in the space above and below the lowermost floor slab is generated. It is possible to suppress entry and exit .

Further, in the drainage pipe structure, it is preferable that a heat-expandable sheet is wound around a portion of the connecting vertical pipe to be embedded in the lowermost floor slab.

According to this arrangement, when the fire or the like, contact with intumescent sheet wound in a connection vertical tube is expanded, since the formation of the refractory layer in the through hole formed in the bottom floor slab, the top It is possible to suppress the inflow and outflow of heat in the spaces above and below the lower floor slab.

Further, the present invention is the following, is targeted also drain pipe structure provided in the bottom floor slab.

The drainage pipe structure is arranged above the lowermost floor slab, and has an upper connection portion that can be connected to a standing pipe that allows drainage from each floor to flow down, and a lower portion that is formed below the upper connection portion. A joint having a cylindrical lower connecting portion extending to, a curved tubular leg joint connected to a horizontal main pipe arranged under the lowermost floor slab, and a lower end connecting to the above leg joint. while being at least partially embedded in the lowest floor slab, a connecting vertical pipe profile is a straight shape, and an upper receptacle portion can be inserted to the lower connecting portion, the upper end portion of the connecting vertical pipe The lower receiving portion is provided with an insertable lower receiving portion and a connecting joint having the upper end portion of the connecting vertical pipe inserted, and the lower receiving portion is embedded in the lowermost floor slab and is the most. It is characterized in that the lower connecting portion is inserted into the upper receiving portion protruding above the upper surface of the lower slab.

According to this configuration, the lower connection portion of the joint and the leg joint are connected via a connecting vertical pipe instead of being directly connected, so that the slab thickness of the lowest floor slab is short when the slab thickness is thin. By preparing a connecting vertical pipe and preparing a long connecting vertical pipe when the slab thickness of the lowest floor slab is thick, it is possible to realize a drainage pipe structure according to the slab thickness of the lowest floor slab. That is, according to this configuration, it is not necessary to manufacture a special joint even if the slab thickness of the lowest floor slab changes, so that the pipe is connected according to the slab thickness of the lowest floor slab while suppressing an increase in manufacturing cost. The fit can be improved. Further, since at least a part of the upper receiving portion connects the lower connecting portion of the joint and the connecting vertical pipe via the connecting joint protruding above the upper surface of the lowermost floor slab, the lower connecting portion and the connecting vertical pipe are connected. Connection work can be eliminated. Then, since the lower connecting portion of the joint is inserted into the upper receiving portion protruding above the upper surface of the lowermost floor slab, the lower connecting portion is surely inserted into the upper receiving portion. While checking, the connection work between the joint and the connecting vertical pipe can be performed. As a result, construction management becomes easy, and construction quality can be improved.
Further, the present invention is a drainage pipe structure provided in the lowermost floor slab, and has a branch pipe connection portion that can be connected to a horizontal branch pipe arranged above the lowermost floor slab, and a branch pipe connection portion that is more than the branch pipe connection portion. An assembly joint having a downwardly extending cylindrical lower connection formed on the lower side, and a curved tubular leg joint connected to a horizontal main pipe arranged under the bottom floor slab. lower end Ru is connected to the leg joint, a connecting vertical pipe profile is straight shape, at least partially buried in the bottom floor slab, the upper can be inserted the lower connection portions of the aggregate joint socket A connection joint having a portion, a lower socket portion into which the upper end portion of the connection vertical pipe can be inserted, and a connection joint, and the inner diameter of the upper socket portion of the connection joint is the lower socket of the connection joint. It is larger than the inner diameter of the portion, and is characterized in that the lower connecting portion of the collective joint is inserted into the upper receiving portion of the connecting joint.

As described above, according to the drain pipe structure according to the present invention, as described, it improves the fit of the pipe in accordance with the slab thickness of bottom floor slab while suppressing an increase in cost, to facilitate the construction management it can.

It is a figure which shows typically the drainage pipe structure which concerns on Embodiment 1 of this invention. It is an exploded view which shows typically the member which comprises the drainage pipe structure. It is a figure which shows typically the connection structure of a collective joint and a connection vertical pipe through a connection joint, FIG. (A) is a figure which shows the state before connection, and FIG. (B) is a figure after connection. It is a figure which shows the state. It is a figure which shows typically the connection form of a leg joint and a connection vertical pipe. It is a figure explaining the construction procedure of a drainage pipe structure schematically. It is a figure which shows typically the connection structure of the collective joint and the connection vertical pipe through the connection joint which concerns on Embodiment 2 of this invention, and the figure (a) is a figure which shows the state before connection, and is the same. FIG. (B) is a diagram showing a state after connection. It is a figure which shows typically the drainage pipe structure which concerns on other embodiment. It is a figure which shows typically the conventional drainage pipe structure.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

(Embodiment 1)
-Drainage piping structure-
FIG. 1 is a diagram schematically showing a drainage pipe structure 1 according to the present embodiment, and FIG. 2 is an exploded view schematically showing a member constituting the drainage pipe structure 1. This drainage pipe structure 1 is provided on the lowermost floor slab 20 of a building such as an apartment house or a hotel on a plurality of floors, and is arranged above the drainage on the upper floor flowing down in the standing pipe 22 or on the lowermost floor slab 20. This is for collecting the drainage flowing in the horizontal branch pipe 23 and discharging it to the horizontal main pipe 21 arranged below the lowermost floor slab 20. As shown in FIG. 2, the drainage pipe structure 1 includes a collective joint 2, a connecting vertical pipe 3, a connecting joint 4, and a leg joint 5. In the drainage pipe structure 1, as shown in FIG. 1, the collective joint 2 is connected to the connecting vertical pipe 3 via the connecting joint 4, and the lower end of the connecting vertical pipe 3 is connected to the connecting vertical pipe 3 via the leg joint 5. It is connected to the horizontal main pipe 21, which makes it possible to discharge the drainage collected in the collective joint 2 to the horizontal main pipe 21.

The collective joint 2 is made of, for example, polyvinyl chloride. As shown in FIG. 2, the collective joint 2 has a substantially cylindrical collective portion 6 forming the main body of the collective joint 2, a cylindrical upper connection portion 7 formed on the upper side of the collective portion 6, and a horizontal direction. Three cylindrical branch pipe connecting portions 8 extending from the gathering portion 6 in three directions with an interval of 90 °, and downward from the lower end of the gathering portion 6 formed below the branch pipe connecting portion 8. It has a cylindrical lower connecting portion 9 that extends. In the collective joint 2, the vertical pipe 22 is connected to the upper connecting portion 7, while the horizontal branch pipe 23 is connected to the branch pipe connecting portion 8, and the drainage from the vertical pipe 22 and the horizontal branch pipe 23 is connected. Are gathered in the collecting portion 6 and are discharged downward from the lower connecting portion 9. When the number of lateral branch pipes 23 is less than 3, the unused branch pipe connection portion 8 is closed by a lid (not shown) or the like.

The connecting vertical pipe 3 is separate from the collective joint 2 that connects the collective joint 2 and the leg joint 5 with the lowermost floor slab 20 interposed therebetween by burying at least a part of the connecting vertical pipe 3 in the lowermost floor slab 20. Moreover, it is a resin tube having a straight outer shape. The connecting vertical pipe 3 is a heat-expandable pipe having a three-layer structure having an inner surface layer and an outer surface layer made of hard polyvinyl chloride and an intermediate layer made of a vinyl chloride resin composition containing heat-expandable graphite. .. The inner diameter of the connecting vertical pipe 3 is substantially equal to the inner diameter of the lower connecting portion 9, while the outer diameter thereof is formed to be slightly smaller than the outer diameter of the lower connecting portion 9 (see FIG. 3B). In this way, since the inner diameter of the connecting vertical pipe 3 is substantially equal to the inner diameter of the lower connecting portion 9, when the connecting vertical pipe 3 and the collective joint 2 are connected, the inner peripheral surface of the connecting vertical pipe 3 and the lower connecting portion are connected. The inner peripheral surface of 9 is flush with each other.

FIG. 3 is a diagram schematically showing a connection structure between the collective joint 2 and the connection vertical pipe 3 via the connection joint 4, and FIG. 3A is a diagram showing a state before connection. (B) is a diagram showing a state after connection. In addition, in FIGS. 3A and 3B, only the left half of the figure is shown in the cross-sectional view. The alternate long and short dash line in FIGS. 3A and 3B shows the upper surface 20a of the lowermost floor slab 20.

As described above, the connecting joint 4 is for connecting the collective joint 2 and the connecting vertical pipe 3. The connecting joint 4 is made of, for example, polyvinyl chloride. The connection joint 4 is formed in a substantially cylindrical shape having a step portion 4a, and has an upper receiving portion 12 into which the lower connecting portion 9 can be inserted and a lower receiving portion into which the upper end portion of the connecting vertical pipe 3 can be inserted. It has a mouth portion 13. More specifically, as shown in FIG. 3A, the connecting joint 4 has a large diameter portion 12 having an inner diameter slightly larger than the outer diameter of the lower connecting portion 9, and a connecting joint 4 slightly larger than the outer diameter of the connecting vertical pipe 3. A small diameter portion 13 having a large inner diameter and a small diameter portion 13 are formed so as to be vertically connected via a step portion 4a, and a stopper rib 15 having a substantially rectangular cross section protruding inward in the radial direction from the step portion 4a is formed. It is provided all around. The annular stopper rib 15 is formed so that the inner diameter thereof is substantially equal to the inner diameter of the connecting vertical pipe 3 and the inner diameter of the lower connecting portion 9. Then, as shown in FIG. 3B, the lower connecting portion 9 is inserted into the large diameter portion 12 until the lower end of the lower connecting portion 9 hits the upper surface of the stopper rib 15, and the connecting vertical pipe 3 is inserted into the connecting vertical pipe 3 with the upper end thereof being the lower surface of the stopper rib 15. By inserting it into the small diameter portion 13 until it hits, the connecting joint 4 is inserted in a state where the inner peripheral surface of the connecting vertical pipe 3 and the inner peripheral surface of the stopper rib 15 and the inner peripheral surface of the lower connecting portion 9 are flush with each other. The collective joint 2 and the connecting vertical pipe 3 are connected via the connecting vertical pipe 3. That is, in this connection joint 4, the large diameter portion 12 above the stopper rib 15 constitutes the upper receiving portion 12, while the small diameter portion 13 below the stopper rib 15 constitutes the lower receiving portion 13. There is. In this way, the inner peripheral surface of the connecting vertical pipe 3, the inner peripheral surface of the stopper rib 15, and the inner peripheral surface of the lower connecting portion 9 are flush with each other, so that the drainage pipe structure 1 of the present embodiment is used for drainage. The drainage collected in the collective joint 2 can be smoothly flowed down without being caught by the contained foreign matter or the like. The lower connecting portion 9 and the upper receiving portion 12, and the connecting vertical pipe 3 and the lower receiving portion 13 are adhesively bonded to each other by using an adhesive.

Further, in the drainage pipe structure 1 of the present embodiment, the lower receiving portion 13 into which the upper end portion of the connecting vertical pipe 3 is inserted is embedded in the lowermost floor slab 20, and at least a part thereof is formed in the lowermost floor slab 20. The lower connecting portion 9 is inserted into the upper receiving portion 12 protruding above the upper surface 20a. The reason for adopting such a configuration is to solve the problems of the conventional drainage pipe structure as described below.

FIG. 8 is a diagram schematically showing the conventional drainage pipe structures 101 and 111.

First, as shown in FIG. 8A, the collective joint 102 in which the upper pipe connecting portion 107 (corresponding to the upper connecting portion 7) and the lower pipe connecting portion 103 (corresponding to the connecting vertical pipe 3) are integrally formed is formed. The conventional drainage pipe structure 101 used will be described. In the conventional drainage pipe structure 101, for example, when the horizontal main pipe 21 is piped close to the lower surface of the lowermost floor slab 20, the upper end of the leg joint 105 is located just below the lower surface of the lowermost floor slab 20. , It may be necessary to connect the lower pipe connecting portion 103 and the leg joint 105 in the lowermost floor slab 20 (inside the through hole 20b formed in the lowermost floor slab 20) (FIG. 8A). See white arrow). However, when the connection work is performed in the through hole 20b of the lowermost floor slab 20, it becomes difficult to confirm whether or not the lower pipe connection portion 103 and the leg joint 105 are securely connected, resulting in water leakage or the like. There is a problem of anxiety about defects.

Therefore, in order to eliminate the connection work in the through hole 20b of the lowermost floor slab 20, as shown in FIG. 8B, the collective joint 112 and the connecting vertical pipe 113 are separated, and the connecting vertical pipe 113 is at the bottom. A drainage pipe structure 111 is conceivable in which the collective joint 112 and the connecting vertical pipe 113 are connected to each other above the lowermost floor slab 20 by extending above the upper surface 20a of the floor slab 20. However, in the drainage pipe structure 111, since the installation position of the collective joint 112 is higher than necessary, the bottom of the horizontal branch pipe 23 is raised, so that the drainage system on the lowermost floor slab 20 is made compact. There is a problem that it becomes difficult.

In this respect, in the present embodiment, as shown in FIGS. 1 and 3, the upper end of the connecting vertical pipe 3 is formed so that the upper end portion of the upper receiving portion 12 projects upward from the upper surface 20a of the lowermost floor slab 20. Since the connecting joint 4 into which the portion is inserted is installed in the through hole 20b of the lowermost floor slab 20 and the lower connecting portion 9 is inserted into the upper receiving portion 12 in this state, the connection is vertically connected to the lower connecting portion 9. The connection with the pipe 3 can be made above the lowest floor slab 20. As a result, the collective joint 2 and the connecting vertical pipe 3 can be connected via the connecting joint 4 while confirming that the lower connecting portion 9 is securely inserted into the upper receiving portion 12. Therefore, construction management becomes easy, and construction quality can be improved.

Moreover, in the drainage pipe structure 1 of the present embodiment, the connecting vertical pipe 3 is not extended above the upper surface 20a of the lowermost floor slab 20, but the upper receiving portion 12 covering the lower connecting portion 9 of the collective joint 2 is covered. Since only a part of the slab 20 is projected above the upper surface 20a of the lowermost floor slab 20, the installation position of the collective joint 2 is not raised. As a result, since the bottom of the horizontal branch pipe 23 does not rise, it is possible to make the fit of the drainage system on the lowermost floor slab 20 compact.

In the present embodiment, the upper end portion of the upper receiving portion 12 projects upward from the upper surface 20a of the lowermost floor slab 20, but at least a part of the upper receiving portion 12 is the lowermost floor slab. As long as it protrudes above the upper surface 20a of 20, for example, the upper end of the upper receiving portion 12 and the upper surface 20a of the lowermost floor slab 20 may be flush with each other. By doing so, the installation position of the collective joint 2 and the pipe bottom of the lateral branch pipe 23 can be further lowered, so that the fit of the drainage system on the lowermost floor slab 20 can be further made more compact.

The leg joint 5 is a curved tubular (elbow-shaped) joint, and connects the horizontal main pipe 21 arranged under the lowermost floor slab 20 and the lower end of the connecting vertical pipe 3. The material of the leg joint 5 is not particularly limited, and may be made of resin or cast iron, for example. In the present embodiment, the resin leg joint 5 and the lower end of the connecting vertical pipe 3 are adhesively joined by using an adhesive, but the present invention is not limited to this, and is shown in FIG. 4A, for example. As described above, a rubber ring may be joined using an annular waterproof rubber (not shown), or a flange may be connected as shown in FIG. 4 (b). Further, when the horizontal main pipe 21 can be piped close to the lower surface of the lowermost floor slab 20, the legs are shown in FIG. 4 (c) in order to make the drainage pipe structure 1 even more compact. The adhesive joint between the joint 5 and the connecting vertical pipe 3 may be completely embedded in the lowermost slab 20.

In the drainage pipe structure 1 configured as described above, as shown in FIG. 1, a mortar 10 is provided between the connecting joint 4, the connecting vertical pipe 3, and the leg joint 5 and the hole wall for partitioning the through hole 20b. By placing it, it will be installed on the lowest floor slab 20. Then, by connecting the vertical pipe 22 to the upper connecting portion 7 and connecting the horizontal branch pipe 23 to the branch pipe connecting portion 8, the drainage of the upper floor and the drainage of the lowermost dwelling unit are collected and the horizontal main pipe is collected. A dischargeable state is formed in 21.

As described above, the drainage pipe structure 1 is installed in a state where the lower connecting portion 9 formed on the lower side of the branch pipe connecting portion 8 is fitted in the connecting joint 4 embedded in the lowermost floor slab 20. Since the bottom of the horizontal branch pipe 23 connected to the branch pipe connecting portion 8 is lowered, the fit of the drainage system on the lowermost floor slab 20 can be made compact.

Further, in the drainage pipe structure 1 of the present embodiment, since the connecting vertical pipe 3 has an intermediate layer made of a vinyl chloride resin composition containing heat-expandable graphite, for example, from the lower side of the lowermost floor slab 20. Even if a fire breaks out, the connecting vertical pipe 3 expands greatly and forms a refractory layer in the through hole 20b formed in the lowermost floor slab 20, so that the heat to the upper side of the lowermost floor slab 20 is generated. The inflow can be suppressed.

Further, since the connecting vertical pipe 3 and the collective joint 2 are separate bodies, if the slab thickness of the lowest floor slab 20 is thick, a long connecting vertical pipe 3 is prepared, and the slab thickness of the lowest floor slab 20 is increased. When it is thin, the drainage pipe structure 1 corresponding to the slab thickness of the lowest floor slab 20 can be realized by cutting the resin connecting vertical pipe 3. That is, according to the drainage pipe structure 1 of the present embodiment, even if the slab thickness of the lowest floor slab 20 changes, it is not necessary to manufacture a special collective joint, so that the lowest floor slab 20 can be suppressed while suppressing an increase in cost. The fit of the pipe can be improved according to the thickness of the slab.

-Construction method of drainage piping structure-
Next, the construction method of the drainage pipe structure 1 of the present embodiment will be described with reference to FIG. The broken lines in FIGS. 5A and 5B indicate the cutting line of the connecting vertical pipe 3.

Prior to the construction of the drainage pipe structure 1, the collective joint 2, the connecting vertical pipe 3, the connecting joint 4, the leg joint 5, etc. are brought into the construction site. At this time, the connecting vertical pipe 3 and the leg joint 5 are It may be adhesively joined at the factory and carried in as a unit, or may be carried in as a separate body.

Then, first, the connecting vertical pipe 3 is cut to an optimum length according to the slab thickness of the lowest floor slab 20 and the connection position (installation height) of the leg joint 5 with respect to the horizontal main pipe 21 (installation height). Cutting process). The "optimal length" means the leg portion in a state where the lower end portion of the connecting vertical pipe 3 and the leg joint 5 are connected and the upper end portion of the connecting vertical pipe 3 is inserted into the lower receiving portion 13. When the joint 5 is arranged at the regular installation height, the upper end portion of the upper receiving portion 12 protrudes above the upper surface 20a of the lowermost floor slab 20, and the collective joint 2 is inserted into the upper receiving portion 12. The length of the connecting vertical pipe 3 so that the position of the branch pipe connecting portion 8 does not become too high.

Here, when the connecting vertical pipe 3 and the leg joint 5 are carried in as one unit, as shown in FIG. 5A, the connecting vertical pipe 3 remains connected to the leg joint 5. To the optimum length. On the other hand, when the connecting vertical pipe 3 and the leg joint 5 are carried in as separate bodies, as shown in FIG. 5B, after cutting the connecting vertical pipe 3 to the optimum length, FIG. 5 ( As shown by the white arrow in b), the connecting vertical pipe 3 is adhesively joined to the leg joint 5 (connection step).

Next, as shown by the white arrows in FIG. 5C, the upper end portion of the connecting vertical pipe 3 is inserted into the lower receiving portion 13, and both are adhesively joined (first insertion step). In this embodiment, since the connecting vertical pipe 3 having a straight outer shape is used, in other words, the cross-sectional shape of the connecting vertical pipe 3 does not change regardless of the position where the connecting vertical pipe 3 is cut. In the same manner, the upper end portion of the connecting vertical pipe 3 can be inserted into the lower receiving portion 13.

Next, as shown in FIG. 5D, the connection joint 4 and the connection vertical pipe 3 are inserted into the through hole 20b from the lower side of the lowermost floor slab 20, and the upper end portion of the upper receiving portion 12 is the lowermost floor slab. The leg joint 5 and the horizontal main pipe 21 are connected in a state of protruding upward from the upper surface 20a of 20 (installation step). In other words, the length of the connecting vertical pipe 3 is such that when the connecting joint 4 and the connecting vertical pipe 3 are inserted into the through hole 20b from the lower side of the lowermost floor slab 20, and the leg joint 5 is connected to the horizontal main pipe 21. The length is set so that the upper end portion of the upper receiving portion 12 projects upward from the upper surface 20a of the lowermost floor slab 20. When the connection between the leg joint 5 and the horizontal main pipe 21 is completed, the lower connecting portion 9 of the collective joint 2 is connected to the lower connecting portion 9 from the lowermost floor slab 20 to the upper receiving portion 12 as shown by the arrow in FIG. 5 (d). The lower connecting portion 9 and the upper receiving portion 12 are adhesively joined to each other (second insertion step).

Then, when the installation of the collective joint 2, the connecting vertical pipe 3, the connecting joint 4 and the leg joint 5 is completed, the hole wall for partitioning the connecting joint 4, the connecting vertical pipe 3 and the leg joint 5, and the through hole 20b. A mortar 10 is placed between the mortar and the bottom floor slab 20 is backfilled.

As described above, according to the construction method of the drainage pipe structure 1 of the present embodiment, at the construction site, the connecting vertical pipe 3 is cut according to the slab thickness of the lowest floor slab 20, and the pipe is connected. The fit can be improved. Further, the connecting joint 4 and the connecting vertical pipe 3 inserted therein are inserted into the through hole 20b from the lower side of the lowermost floor slab 20, and the lower connecting portion 9 of the collective joint 2 is inserted into the lowermost floor slab 20. Since it is inserted into the upper receiving portion 12 from above, the connection work in the lowermost floor slab 20 is eliminated, so that the construction management becomes easier.

(Embodiment 2)
The present embodiment is different from the first embodiment in that the lower connecting portion 9 of the collective joint 2 and the connecting joint 14 are connected by a rubber ring joint instead of an adhesive joint. Hereinafter, the differences from the first embodiment will be described.

FIG. 6 is a diagram schematically showing a connection structure between the collective joint 2 and the connection vertical pipe 3 via the connection joint 14 according to the present embodiment, and FIG. 6A is a diagram showing a state before connection. The figure (b) is a diagram showing a state after connection. Like the connection joint 4, the connection joint 14 used in the drainage pipe structure 1 of the present embodiment is formed in a substantially cylindrical shape having a stepped portion 14a, and an upper receiving portion into which the lower connection portion 9 can be inserted. It has a lower receiving portion 17 into which the upper end portion of the connecting vertical pipe 3 can be inserted, and an annular stopper rib 18. As a result, the lower receiving portion 17 and the stopper rib 18 are formed to have the same shape and dimensions as the lower receiving portion 13 and the stopper rib 15 of the connecting joint 4. The connecting joint 14 is made of, for example, polyvinyl chloride, like the connecting joint 4.

However, the upper receiving portion 16 of the connecting joint 14 is formed to have a larger inner diameter than the upper receiving portion 12 of the connecting joint 4. Then, in the connection joint 14, as shown in FIG. 6A, a cylindrical water blocking rubber 19 is attached to the inner peripheral surface of the upper receiving portion 16. A lip portion 19a extending diagonally downward is formed at the upper end portion of the waterproof rubber 19. When the lower connecting portion 9 is inserted into the upper receiving portion 16, as shown in FIG. 6B, the waterproof rubber 19 comes into close contact with the outer peripheral surface of the lower connecting portion 9, so that the lower connecting portion 9 and the collective joint 2 are brought into close contact with each other. The connection joint 14 is connected with watertightness.

By the way, when the lower connecting portion 9 and the upper receiving portion 12 are adhesively joined as in the first embodiment, as described above, the upper end of the upper receiving portion 12 and the upper surface 20a of the lowermost floor slab 20 are bonded. If the two are flush with each other, the fit of the drainage system on the lowermost floor slab 20 can be further made more compact, but in the present embodiment, unlike this, the upper end of the upper receiving portion 16 is formed. It is preferable that the portion protrudes upward from the upper surface 20a of the lowermost floor slab 20. This is so that when the mortar 10 is placed between the connecting joint 4 and the hole wall that partitions the through hole 20b, the connecting portion between the lower connecting portion 9 and the upper receiving portion 16 is not buried by the mortar 10. To make it.

More specifically, when the lower connecting portion 9 and the connecting joint 14 are joined by rubber rings instead of being adhesively joined, the connecting portion between the lower connecting portion 9 and the upper receiving portion 16 is embedded by the mortar 10. Otherwise, it is possible to rotate the collective joint 2 relative to the connecting joint 14 while maintaining the watertightness between the collective joint 2 and the connecting joint 14. Therefore, even after a part of the connecting joint 14 is embedded in the lowermost floor slab 20 by driving the mortar 10, the direction of the branch pipe connecting portion 8 can be adjusted according to the direction of the lateral branch pipe 23. It is possible to increase the degree of freedom in arranging the lateral branch pipe 23 at the time of repair after aging.

(Other embodiments)
The present invention is not limited to embodiments and can be practiced in various other forms without departing from its spirit or key features.

In each of the above embodiments, the connecting vertical pipe 3 is a heat-expandable pipe, but the present invention is not limited to this. For example, the connecting vertical pipe 3 is formed of vinyl chloride, and as shown in FIG. 7, the connecting vertical pipe 3 and the connection are connected. A heat-expandable sheet 24 (for example, Fiblock (registered trademark) manufactured by Sekisui Chemical Industry Co., Ltd.) may be wound around the joint 4.

In this way, in the event of a fire or the like, the heat-expandable sheet 24 wound around the connecting vertical pipe 3 and the connecting joint 4 expands, and the connecting vertical pipe 3 and the connecting joint 4 made of a resin material are crushed and maximized. Since the fireproof layer is formed in the through hole 20b formed in the lower floor slab 20, it is possible to suppress the inflow and outflow of heat in the spaces above and below the lowermost floor slab 20.

Further, in each of the above embodiments, the collective joint 2 having three branch pipe connecting portions 8 is used, but the present invention is not limited to this, for example, the collective joint 2 having four branch pipe connecting portions 8 and the branch pipes of 2 or less. The collective joint 2 having the connecting portion 8 may be used.

Further, in each of the above embodiments, the connecting joints 4 and 14 are provided so that the inner peripheral surface of the lower connecting portion 9 and the inner peripheral surfaces of the stopper ribs 15 and 18 and the inner peripheral surface of the connecting vertical pipe 3 are flush with each other. The collective joint 2 and the connecting vertical pipe 3 are connected via the joint, but if the inner diameter is widened toward the lower side, the difference is not limited to this, and there is a step at the connecting portion between the collective joint 2 and the connecting vertical pipe 3. It may occur.

Thus, the above embodiments are merely exemplary in all respects and should not be construed in a limited way. Furthermore, all modifications and modifications that fall within the equivalent scope of the claims are within the scope of the present invention.

According to the present invention, it is possible to improve the fit of the pipe according to the slab thickness of the bottom floor slab while suppressing the increase in cost, and to facilitate the construction management. Therefore, the drainage pipe provided on the bottom floor of the building. it is extremely beneficial when applied to structures.

1 Drainage piping structure 2 Collective joint 3 Connecting vertical pipe 4 Connecting joint 5 Leg joint 8 Branch pipe connecting part 9 Lower connecting part 12 Upper receiving part 13 Lower receiving part 14 Connecting joint 16 Upper receiving part 17 Lower side Receptacle 20 Bottom floor slab 20a Top surface 20b Through hole 21 Horizontal main pipe 23 Horizontal branch pipe 24 Thermal expansion sheet

Claims (5)

It is a drainage pipe structure provided on the bottom floor slab.
At least part of it is buried in the bottom floor slab, and a resin connecting vertical pipe with a cylindrical outer shape,
A curved tubular resin leg joint located below the bottom floor slab and connected to the lower end of the connecting vertical pipe,
With
The upper end of the connecting vertical pipe is cutable and can be connected to the lower receiving portion of the connecting joint having the lower receiving portion.
The connecting vertical pipe and the leg joint are integrated by an adhesive joint that has been adhesively joined in advance.
A drainage pipe structure characterized in that the adhesive joint between the connecting vertical pipe and the leg joint is embedded in the lowermost floor slab. In the drainage pipe structure according to claim 1,
The connecting vertical pipe is a drainage pipe structure having a three-layer structure having an inner surface layer and an outer surface layer and an intermediate layer made of a resin composition containing heat-expandable graphite. In the drainage pipe structure according to claim 1,
A drainage pipe structure characterized in that a heat-expandable sheet is wrapped around a portion of the connecting vertical pipe to be buried in the lowermost floor slab. It is a drainage pipe structure provided on the bottom floor slab.
An upper connection that is located above the bottom floor slab and can be connected to a vertical pipe that allows drainage from each floor to flow down, and a cylindrical lower connection that extends downward and is formed below the upper connection. A joint with a part,
A curved tubular leg joint that connects to the horizontal main pipe located under the bottom floor slab,
The lower end portion is connected to the leg joint, and at least a part of which is embedded in the bottom floor slab, connecting the vertical pipe profile is straight shape,
A connection joint having an upper receiving portion into which the lower connecting portion can be inserted and a lower receiving portion into which the upper end portion of the connecting vertical pipe can be inserted is provided.
The lower receiving portion into which the upper end of the connecting vertical pipe is inserted is embedded in the lowermost floor slab, and the lower receiving portion protrudes above the upper surface of the lowermost floor slab. A drainage pipe structure characterized by an inserted connection. It is a drainage pipe structure provided on the bottom floor slab.
A branch pipe connection portion that can be connected to a lateral branch pipe arranged on the upper side of the lowermost floor slab, and a cylindrical lower connection portion that extends downward and is formed below the branch pipe connection portion. With the collective joint to have
A curved tubular leg joint that connects to the horizontal main pipe located under the bottom floor slab,
Lower end Ru is connected to the leg joint, a connecting vertical pipe profile is straight shape,
At least a part of the upper receiving portion is embedded in the lowermost floor slab and the lower connecting portion of the collective joint can be inserted, and the lower receiving portion into which the upper end of the connecting vertical pipe can be inserted. With connecting joints,
The inner diameter of the upper receiving portion of the connecting joint is larger than the inner diameter of the lower receiving portion of the connecting joint.
A drainage pipe structure characterized in that a lower connecting portion of the collective joint is inserted into an upper receiving portion of the connecting joint.

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