JP4682679B2 - Pipe connection structure - Google Patents

Description

  The present invention relates to a connection structure between a drain port of a toilet and a drain pipe.

  When connecting a drainage port of a toilet bowl made of earthenware and a synthetic resin drainage pipe standing under the floor, a pipe connection structure as shown in FIGS. In the conduit connection structure shown in FIG. 5, the drainage port 55 of the toilet is inserted into the drainage socket 53 via the elastic packing 54. Further, the drain socket 53 and the drain pipe 51 are bonded to each other below the floor surface 52. Such a pipe connection structure is the best structure for reducing the size of the drain socket 53 and suppressing the rising height of the drain pipe 51.

  However, in the pipe connection structure shown in FIG. 5, when the drain socket 53 is replaced with another one, the adhesive portion 56 between the drain socket 53 and the drain pipe 51 is provided below the floor surface 52. Even if the existing drain socket 53 is cut on the floor 52, the existing drain socket 53 cannot be completely removed. For this reason, when exchanging the drain socket 53, the drain pipe 51 is restarted from the lower side of the floor 52 and the drain pipe 51 is renewed, which requires a great deal of labor and time.

  In recent years, with the increasing demand for saving water related to toilet flushing water, the drainage socket 53 is made larger, and the drainage path is made of a synthetic resin pipe with a high dimensional accuracy, which is used to discharge filth. In many cases, measures are taken to ensure the security. An example of such a pipe connection structure is shown in FIG. As shown in FIG. 6, in this pipe connection structure, the drain pipe 61 buried below the floor surface 62 is extended to a predetermined bonding allowance without being cut at the height of the floor surface 62. Thus, the drain pipe 61 and the drain socket 63 can be bonded at the bonding portion 67 on the floor surface 62.

  Accordingly, when the drain socket 63 is replaced, as shown in FIG. 7, after the drain socket 63 and the drain pipe 61 are cut at predetermined positions on the floor surface 62, the floor surface 62 is again connected via the adapter 70. Since the drain pipe 61 is raised and a new drain socket 73 can be bonded to the adapter 70 by the bonding portion 77, the existing drain socket 63 can be completely removed.

  On the other hand, as a conventional technique related to the present invention, there is a toilet socket for connecting a toilet drain port to a plurality of types of drain pipes having different inner diameters (see, for example, Patent Documents 1 and 2). .

Japanese Utility Model Publication No. 7-25080 Japanese Utility Model Publication No. 7-25081

  In the case of the on-floor adhesive pipe connection structure shown in FIG. 6, the drain socket 63 can be replaced by cutting the existing drain socket 63 on the floor surface 62. However, when changing from the underfloor adhesion type pipe connection structure shown in FIG. 5 to the underfloor adhesion type pipe connection structure shown in FIG. 6, as shown in FIG. It is necessary to re-start the drain pipe 61 from below and update the drain pipe 61. For this reason, a great deal of labor and time is spent when toilet bowl replacement work is performed.

  On the other hand, since the toilet sockets described in Patent Documents 1 and 2 can be connected to a plurality of types of drain pipes having different inner diameters, connection sockets having different dimensions are prepared for pipe connection work. However, it is not possible to cope with the change from the underfloor adhesion type pipe connection structure to the above-floor adhesion type pipe connection structure by one toilet connecting socket.

  The problem to be solved by the present invention is that, when replacing a toilet bowl, it is not necessary to redo the drain pipe work after removing the toilet bowl. It is an object of the present invention to provide a pipe connection structure that is less likely to occur and excellent in airtightness.

The pipe connection structure of the present invention is a pipe connection structure for connecting a toilet drain port and a drain pipe piped upright to the floor surface,
An upper cylindrical portion that communicates with the toilet drain, a lower cylindrical portion that communicates with the drain pipe, and a plurality of cylindrical walls that are formed outside the lower cylindrical portion and coaxially with the lower cylindrical portion and have different inner diameters. An upper drain socket having
It is composed of an adapter having a cylindrical connecting portion that is circumferentially connected to any one of the cylindrical walls, and a lower connecting portion that is connected to the drain pipe in an airtight manner,
A cylindrical portion that hangs down in the drain pipe is provided in the lower connection portion,
Any one of the cylindrical walls of the upper drain socket and the cylindrical connecting portion of the adapter are fitted and connected to each other. Here, “circumferential contact” means that at least a part of a plurality of cylindrical members having different inner diameters located on the same axis are in contact with each other along the circumferential direction.

With such a configuration, the lower connection portion of the adapter is connected in an airtight manner to a drain pipe piped upright to the floor surface, and either the cylindrical connection portion of the adapter or the cylindrical wall of the upper drain socket is fitted to each other. A pipe connection structure can be formed by simply connecting the lower cylindrical portion of the upper drainage socket to the drainage pipe and communicating the toilet drainage port to the upper cylindrical portion of the upper drainage socket. Therefore, when the toilet bowl is replaced, it is not necessary to redo the drain pipe work after removing the toilet bowl, and the replacement work can be performed only on the floor. In addition, since the connection part between the drain pipe and the lower connection part of the adapter, and the connection part between the cylindrical connection part of the adapter and the cylindrical wall of the upper drain socket are in contact with each other without any gaps, the shaft center is not easily displaced and is airtight. Even better.
Furthermore, since the cylindrical part suspended from the lower connection part of the adapter is inserted into the drain pipe, it becomes possible to align the two parts, so that the workability at the time of connection is improved. Moreover, since the cylindrical part suspended from the lower connection part of the adapter is always positioned coaxially in the drain pipe, the airtightness is excellent.

In addition, the pipe connection structure of the present invention is a pipe connection structure that connects a toilet drain port and a drain pipe piped upright to the floor surface,
A lower drain socket having a lower connection portion connected to the drain pipe, and an upper connection portion communicating with the toilet drain port;
An upper cylindrical portion that communicates with the toilet drain, a lower cylindrical portion that communicates with the drain pipe, and a plurality of cylindrical walls that are formed outside the lower cylindrical portion and coaxially with the lower cylindrical portion and have different inner diameters. An upper drain socket having
It is composed of an adapter having a cylindrical connection portion that is in circumferential contact with any one of the cylindrical walls, and a lower connection portion that is connected in an airtight manner via the lower drain socket and a sealing material,
A cylindrical portion that hangs down in the drain pipe is provided in the lower connection portion,
The upper connecting portion of the lower drain socket and any one of the cylindrical walls of the upper drain socket are fitted and connected to each other.

With this configuration, the lower connection part of the lower drainage socket is connected to the drain pipe that is erected upright to the floor surface, and the lower connection part of the adapter is connected to the upper connection part of the lower drainage socket via the sealing material. Connected in an airtight manner, the adapter cylindrical connection and one of the cylindrical walls of the upper drain socket are fitted and connected to each other, and the lower cylindrical portion of the upper drain socket is connected to the drain pipe, so that the upper cylindrical portion of the upper drain socket A pipe connection structure can be formed simply by communicating the toilet drain. Therefore, when the toilet bowl is replaced, it is not necessary to redo the drain pipe work after removing the toilet bowl, and the replacement work can be performed only on the floor. Also, the connection part between the drain pipe and the lower connection part of the lower drain socket, the connection part between the upper connection part of the lower drain socket and the lower connection part of the adapter, the connection between the cylindrical connection part of the adapter and the cylindrical wall of the upper drain socket Since the portions are contacted without gaps, the axial center is hardly displaced, and the airtightness is excellent.
Furthermore, since the cylindrical part suspended from the lower connection part of the adapter is inserted into the drain pipe, it becomes possible to align the two parts, so that the workability at the time of connection is improved. Moreover, since the cylindrical part suspended from the lower connection part of the adapter is always positioned coaxially in the drain pipe, the airtightness is excellent.

  Here, it is desirable that the connection cylindrical portion of the adapter and any one of the cylindrical walls of the upper drain socket are fitted and connected to each other. With such a configuration, the airtightness of the connection portion between the adapter and the upper drainage socket is enhanced, so that the airtightness of the entire pipeline connection portion is improved.

  Moreover, the flange which contact | abuts the inner peripheral surface of the upper connection part of the said lower drainage socket can also be provided in the outer periphery of the connection cylindrical part of the said adapter. With such a configuration, when connecting the connecting cylindrical portion of the adapter to the upper connection portion of the lower drainage socket, the flanges of the adapter are brought into contact with the inner peripheral surface of the upper connection portion of the lower drainage socket, so Since centering can be performed, misalignment of the shaft center can be eliminated, and workability is improved.

  According to the present invention, when the toilet bowl is replaced, there is no need to redo the drain pipe work after removing the toilet bowl, the replacement work can be performed only on the floor, and the pipe connection structure having excellent airtightness is provided. Can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing constituent members before forming a pipe connecting structure according to an embodiment of the present invention, and FIG. 2A is a process of assembling the pipe connecting structure using the constituent members shown in FIG. FIG. 2B is a vertical cross-sectional view showing a state after the assembly of the pipe connection structure.

  As shown in FIG. 1, the pipe connection structure of the present embodiment connects a toilet drain port 1 and a drain pipe 3 piped upright to the floor 2, and is connected to the drain pipe 3. The lower drain socket 4, the adapter 5 disposed on the lower drain socket 4 via the seal 7, and the upper drain socket 6 disposed so as to cover the lower drain socket 4 and the adapter 5 are configured.

  The upper drain socket 6 is formed coaxially with the lower cylindrical portion 6b outside the lower cylindrical portion 6b, an upper cylindrical portion 6a communicating with the toilet drain port 1, a lower cylindrical portion 6b communicating with the drain pipe 3, and the lower cylindrical portion 6b. A plurality of cylindrical walls 6c and 6d having different inner diameters are provided, and a skirt portion 6e is provided around the cylindrical walls 6c and 6d. The adapter 5 includes a cylindrical connection portion 5 a that is circumferentially connected to the cylindrical wall 6 c and a lower connection portion 5 b that is connected in an airtight manner via the drain pipe 3 and the seal 7. The lower drain socket 4 has a lower connection portion 4 b connected to the drain pipe 3 and an upper connection portion 4 a communicating with the toilet drain port 1.

  An elastic packing 8 is interposed between the upper cylindrical portion 6 a of the upper drain socket 6 and the toilet drain port 1. In the upper drain socket 6, the lower cylindrical portion 6b is closest to the axial center X, cylindrical walls 6c and 6d are formed at intervals around the lower cylindrical portion 6b, and a skirt portion 6e is formed on the outermost periphery. The lower end opening of the skirt 6e is located at the lowermost part, the lower end opening of the lower cylindrical part 6b is located above it, the lower end opening of the cylindrical wall 6d is located above it, and the cylindrical wall 6c is located above it. The lower end opening is located.

  In the adapter 5, a flange 5c is formed on the outer periphery of the cylindrical connecting portion 5a, and a lower connecting portion 5b is provided below the flange 5c. The lower connecting portion 5b has a shape that gradually decreases in diameter toward the lower side. In the lower drain socket 4, the inner diameter of the upper connection part 4 a is larger than the inner diameter of the drain pipe 3, and the outer diameter of the lower connection part 4 b is smaller than the inner diameter of the drain pipe 3. A step portion 4c is formed along the inner peripheral surface at the boundary between the upper connection portion 4a and the lower connection portion 4b, and the seal 7 is disposed on the step portion 4c. A flange 4d is formed on the outer periphery of the stepped portion 4c, and the lower drain socket 4 is held by placing the flange 4d on the floor surface 2.

  As shown in FIG. 1, a lower connection portion 4 b of a lower drainage socket 4 is inserted and connected to a drainage pipe 3 erected up to the floor surface 2, and a stepped portion in an upper connection portion 4 a of the lower drainage socket 4 is connected. The seal 7 is disposed on 4c. As shown in FIG. 2A, the lower connection portion 5b of the adapter 5 is disposed on the seal 7, and the cylindrical connection portion 5a of the adapter 5 and the cylindrical wall 6c of the upper drain socket 6 are fitted and connected to each other. At the same time, the lower cylindrical portion 6 b of the upper drain socket 6 faces the lower connection portion 4 b of the lower drain socket 4 and communicates with the drain pipe 3. As shown in FIG. 2B, when the upper drain socket 6 and the adapter 5 are pressed downward, the seal 7 between the lower connection portion 5b of the adapter 5 and the lower drain socket 4 is plastically deformed. 5 and the lower drain socket 4 are connected in an airtight manner. And if the toilet drainage 1 is connected to the upper cylindrical part 6a of the upper drain socket 6, the pipe connection structure can be completed.

  Therefore, when the toilet bowl (not shown) is replaced, it is not necessary to redo the drain pipe work after removing the toilet bowl, and the replacement work can be performed only on the floor. Further, a connecting portion between the drain pipe 3 and the lower connecting portion 4b of the lower drain socket 4, a connecting portion between the upper connecting portion 4a of the lower drain socket 4 and the lower connecting portion 5b of the adapter 5, and a cylindrical connecting portion 5a of the adapter 5 Since the connection portion of the upper drain socket 6 with the cylindrical wall 6c is in contact with no gap, the axial center X is not easily displaced, and the airtightness is excellent.

  When the adapter 5 and the upper drain socket 6 are attached to the lower drain socket 4, the upper connecting portion 4 a of the lower drain socket 4 and the cylindrical wall 6 d of the upper drain socket 6 are in circumferential contact with each other, and the cylinder of the adapter 5 Since the operation proceeds while the connecting portion 5a and the cylindrical wall 6c of the upper drain socket 6 are in contact with each other, it is possible to prevent the axial center X from being displaced between the lower drain socket 4, the adapter 5, and the upper drain socket 6. And a reliable airtight structure can be formed.

  The upper drain socket 6 disposed on the floor surface 2 is provided with two cylindrical walls 6c and 6d having different inner diameters, and these cylindrical walls 6c and 6d correspond to resin pipes having nominal diameters 75 and 100, respectively. . Therefore, when changing from the underfloor adhesion type pipe connection structure to the above-floor adhesion type pipe connection structure, the cylinder wall 6c, 6d is used as an inner cylinder and an outer cylinder, thereby updating the underfloor drain pipe. It is possible to install the upper drain socket 6 without doing.

  Further, since the cylindrical connecting portion 5a of the adapter 5 and the cylindrical wall 6c of the upper drain socket 6 are connected to each other, the airtightness of the connecting portion between the adapter 5 and the upper drain socket 6 is high, and the pipe connection The airtightness of the entire part is improved.

  Further, a flange 5 c that contacts the inner peripheral surface of the upper connection portion 4 a of the lower drain socket 4 is provided on the outer periphery of the cylindrical connection portion 5 a of the adapter 5. For this reason, when connecting the cylindrical connection part 5a of the adapter 5 to the upper connection part 4a of the lower drainage socket 4, the flange 5c of the adapter 5 is brought into contact with the inner peripheral surface of the upper connection part 4a of the lower drainage socket 4. The axial centers X of each other can be accurately aligned, the deviation of the axial centers X can be eliminated, and the workability is also good.

  Next, another embodiment of the present invention will be described with reference to FIGS. 3 and 4 are vertical sectional views showing a pipe connection structure according to another embodiment of the present invention. 3 and 4, parts having the same structure and function as those of the pipe connection structure shown in FIGS. 1 and 2 are denoted by the same reference numerals as those in FIGS. 1 and 2. Is omitted.

  The pipe connection structure shown in FIG. 3 includes an upper cylindrical portion 16a that communicates with a toilet drain (not shown), a lower cylindrical portion 16b that communicates with the drainage pipe 3, and a lower cylindrical portion outside the lower cylindrical portion 16b. An upper drain socket 16 having a plurality of cylindrical walls 16c and 16d formed coaxially with 16b and having different inner diameters, a cylindrical connecting portion 15a that is in circumferential contact with the inner surface of the cylindrical wall 16c, the drain pipe 3, and an elastic packing And an adapter 15 having a cylindrical portion 15 c connected in an airtight manner via 18. The cylindrical wall 16c of the upper drain socket 16 and the cylindrical connecting portion 15a of the adapter 15 are fitted and connected to each other. The cylindrical portion 15 c is formed in a state of hanging from the lower connection portion 15 b of the adapter 15 into the drain pipe 3.

  With such a configuration, the cylindrical portion 15c suspended from the lower connection portion 15b of the adapter 15 is connected to the drain pipe 3 erected up to the floor surface 2 via the elastic packing 18 in an airtight manner. 15 cylindrical connection portions 15 a and the cylindrical wall 16 c of the upper drain socket 16 are fitted and connected to each other, and the lower cylindrical portion 16 b of the upper drain socket 16 is connected to the drain pipe 3, so that the upper cylindrical portion 16 a of the upper drain socket 16 is connected. A pipe connection structure can be formed simply by communicating a toilet drain (not shown) through the elastic packing 8.

  Therefore, when the toilet bowl is replaced, it is not necessary to redo the drain pipe work after removing the toilet bowl, and the replacement work can be performed only on the floor. Further, since the connecting portion between the drain pipe 3 and the cylindrical portion 15c of the adapter 15 and the connecting portion between the cylindrical connecting portion 15a of the adapter 15 and the cylindrical wall 16c of the upper drain socket 16 are in contact with each other without gaps, the axial center shifts. Is less likely to occur and has excellent airtightness.

  The pipe connection structure shown in FIG. 4 includes a lower drain socket 14 having a lower connection portion 14b connected to the drain pipe 3, an upper connection portion 14a communicating with a toilet drain port (not shown), and a toilet drain port. An upper cylindrical portion 16a communicating with the drain pipe 3, a lower cylindrical portion 16b communicating with the drain pipe 3, and a plurality of cylindrical walls 16c, 16d formed coaxially with the lower cylindrical portion 16b outside the lower cylindrical portion 16b and having different inner diameters. An upper drain socket 16 having a cylindrical connection with the cylindrical wall 16c, a lower connection portion 25b connected to the lower drain socket 14 through the seal 7, and a lower connection portion 25b. It is comprised with the adapter 25 which has the cylindrical part 25c extended below. The upper connecting portion 14a of the lower drain socket 14 and the cylindrical wall 16d of the upper drain socket 16 are fitted and connected to each other.

  The pipe connection structure shown in FIG. 4 is the same as the pipe connection structure shown in FIG. 2B, but a cylindrical part 25 c that hangs down in the drain pipe 3 is provided on the lower connection part 25 b of the adapter 25. Yes. With such a configuration, the cylindrical part 25c suspended from the lower connection part 25b of the adapter 25 can be inserted into the drainage pipe 3 so that the alignment between the two can be performed. It is. Moreover, since the cylindrical part 25c suspended from the lower connection part 25b of the adapter 25 is always positioned coaxially in the drain pipe 3, the airtightness is excellent.

  INDUSTRIAL APPLICABILITY The present invention can be widely used as a connection structure between a drain outlet of a toilet bowl and a drain pipe arranged in a toilet such as a general house or public facility.

It is sectional drawing which shows the structural member before forming the pipe-line connection structure which is embodiment of this invention. (A) is a vertical sectional view showing a state in which the pipe connection structure is being assembled using the components shown in FIG. 1, and (b) is a vertical sectional view showing a state after the pipe connection structure is assembled. It is a vertical sectional view showing a pipe line connection structure which is another embodiment of the present invention. It is a vertical sectional view showing a pipe line connection structure which is another embodiment of the present invention. It is a vertical sectional view showing a conventional pipe connection structure. It is a vertical sectional view showing a conventional pipe connection structure. It is a vertical sectional view showing a conventional pipe connection structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Toilet drain 2 Floor surface 3 Drain pipe 4,14 Lower drain socket 4b, 5b, 14b, 15b, 25b Lower connection part 4a, 14a Upper connection part 4c Step part 4d, 5c Flange 5, 15, 25 Adapter 5a, 15a , 25a Cylindrical connecting part 6, 16 Upper drain socket 6a, 16a Upper cylindrical part 6b, 16b Lower cylindrical part 6c, 6d, 16c, 16d Cylindrical wall 6e Skirt part 7 Seal 8, 18 Elastic packing 15c, 25c Cylindrical part X axis

Claims (4)

A pipe connection structure for connecting a toilet drain port and a drain pipe piped upright to a floor surface, an upper cylindrical portion communicating with the toilet drain port, and a lower cylindrical portion communicating with the drain pipe An upper drain socket having a plurality of cylindrical walls with different inner diameters formed coaxially with the lower cylindrical portion on the outside of the lower cylindrical portion;
It is composed of an adapter having a cylindrical connecting portion that is circumferentially connected to any one of the cylindrical walls, and a lower connecting portion that is connected to the drain pipe in an airtight manner,
A cylindrical portion that hangs down in the drain pipe is provided in the lower connection portion,
One of the cylindrical walls of the upper drain socket and the cylindrical connecting portion of the adapter are fitted and connected to each other. A pipe connection structure for connecting a toilet drain port and a drain pipe arranged upright to the floor surface,
A lower drain socket having a lower connection portion connected to the drain pipe, and an upper connection portion communicating with the toilet drain port;
An upper cylindrical portion that communicates with the toilet drain, a lower cylindrical portion that communicates with the drain pipe, and a plurality of cylindrical walls that are formed outside the lower cylindrical portion and coaxially with the lower cylindrical portion and have different inner diameters. An upper drain socket having
It is composed of an adapter having a cylindrical connection portion that is in circumferential contact with any one of the cylindrical walls, and a lower connection portion that is connected in an airtight manner via the lower drain socket and a sealing material,
A cylindrical portion that hangs down in the drain pipe is provided in the lower connection portion,
A pipe connection structure characterized in that an upper connection portion of the lower drainage socket and one of cylindrical walls of the upper drainage socket are fitted and connected to each other. The pipe connection structure according to claim 2, wherein the connection cylindrical portion of the adapter is fitted and connected to one of the cylindrical walls of the upper drain socket.   4. The pipe connection structure according to claim 2, wherein a flange that abuts on an inner peripheral surface of an upper connection portion of the lower drain socket is provided on an outer periphery of a connection cylindrical portion of the adapter.

Images