JP2023174620A - Pipe joint - Google Patents

Abstract

To provide a pipe joint capable of appropriately preventing damage of a rubber ring.SOLUTION: A pipe joint 50 comprises a vertical pipe body 52 and a branch pipe part 54 protruding laterally from the pipe body, and is provided at a confluence portion of a drainage vertical pipe and a drainage horizontal pipe. The branch pipe part comprises: a socket body 12 into which an insert for another piping member is inserted; a rubber ring groove 14 formed on an inner peripheral surface of the socket body; a rubber ring 16 having a rubber ring body housed in the rubber ring groove and a lip part protruding from its inner peripheral surface; and a space forming part 18 that is formed on the inner peripheral surface of the socket body so as to be continuous with a back side wall part of the rubber ring groove, and forms an escape space that communicates with an internal space of the rubber ring groove.SELECTED DRAWING: Figure 9

Description

The present invention relates to a pipe joint, and particularly to a pipe joint that includes a branch pipe portion in which a rubber ring having a lip portion is attached to a rubber ring groove.

An example of a conventional rubber ring socket is disclosed in Patent Document 1. In the pipe socket structure (rubber ring socket) of Patent Document 1, a rubber ring storage groove (rubber ring groove) is provided on the inner peripheral surface of the socket (socket body). A rubber ring and an elastic ring are stored in this rubber ring storage groove. The rubber ring is an annular body having a dogleg-shaped cross section and has an inner diameter slightly smaller than the outer diameter of the spout, and has a protrusion (lip) that protrudes inward.

Japanese Patent Application Publication No. 9-242955

A spigot for another piping member is inserted into the rubber ring socket. Basically, the spout is inserted straight into the rubber ring socket, but there are cases where it is unintentionally inserted diagonally. Particularly, in the case of pipe joints in which the rubber ring socket (branch pipe part) is placed near the building frame, such as on the floor, near the ceiling, or against the wall, oblique insertion is likely to occur. When the spigot is inserted diagonally into the rubber ring socket, the tip of the spigot gets caught on the lip of the rubber ring and the lip is stretched, causing the tip of the spigot to connect with the back wall of the rubber ring groove. The lip portion is sandwiched between them (see FIG. 10). If you forcefully screw in the spout in this state, the rubber ring will be damaged.

Therefore, the main object of this invention is to provide a new pipe fitting.

Another object of the present invention is to provide a pipe joint that can appropriately prevent damage to the rubber ring.

A first invention is a pipe joint that includes a vertical pipe body and a branch pipe part that projects laterally from the pipe main body, and is provided at a confluence part of a drainage vertical pipe and a horizontal drainage pipe, and the branch pipe part The socket body into which the spout of another piping member is inserted, the rubber ring groove formed on the inner peripheral surface of the socket body, the rubber ring body accommodated in the rubber ring groove, and the inner periphery of the rubber ring body a rubber ring having a lip portion protruding from the surface; and a space formed on the inner circumferential surface of the socket body so as to be continuous with the back wall of the rubber ring groove, and forming an escape space communicating with the inner space of the rubber ring groove. The pipe joint is provided with a forming part, and the escape space formed by the space forming part is an escape space of the lip part to avoid the lip part from being pinched by a spout inserted obliquely into the socket body. .

In the first invention, the pipe joint includes a vertical pipe main body and a branch pipe portion projecting laterally from the pipe main body, and is provided at a confluence portion of a drainage vertical pipe and a horizontal drainage pipe. The branch pipe section includes a socket body into which a socket for another piping member is inserted. A rubber ring groove is formed on the inner circumferential surface of this socket body, and a rubber ring is attached to this rubber ring groove. The rubber ring has a rubber ring main body that is accommodated in the rubber ring groove, and a lip that projects from the inner circumferential surface of the rubber ring main body. Further, a space forming portion is formed on the inner circumferential surface of the socket body. This space forming portion is formed in a continuous manner with the inner wall portion of the rubber ring groove, and forms an escape space that communicates with the internal space of the rubber ring groove. In such a rubber ring receptacle, even if the spigot is inserted diagonally and the lip of the rubber ring is stretched by the spigot, the stretched lip will be removed by the relief formed by the space forming part. Since it can enter (escape) into the space, pinching of the lip portion is avoided.

According to the first invention, since the space forming part is provided to form the escape space for the lip part, it is possible to appropriately avoid pinching of the lip part when the spout is inserted obliquely. Therefore, damage to the rubber ring can be appropriately prevented.

A second invention is dependent on the first invention, and the inner circumferential surface of the space forming part is formed in a rounded shape.

A third invention is dependent on the first or second invention, and the space forming part is formed only in a part of the circumferential range of the socket body.

According to the third invention, damage to the rubber ring can be appropriately prevented while preventing the rubber ring from falling.

A fourth invention is dependent on the third invention, and the space forming part is formed only at the bottom of the circumferential range of the socket body.

A fifth invention is dependent on the third invention, and the space forming portion is formed only on the side portions of the circumferential range of the socket body.

According to this invention, since the rubber ring socket has a space forming part that forms an escape space for the lip part, damage to the rubber ring can be appropriately prevented.

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

FIG. 2 is a sectional view showing a rubber ring socket according to an embodiment of the present invention. FIG. 3 is a perspective view showing the rubber ring socket with the rubber ring removed. FIG. 3 is a sectional view showing the rubber ring socket with the rubber ring removed. It is a figure which shows the modification of the space formation part with which a rubber ring socket is provided. It is a figure which shows the other modification of the space formation part with which a rubber ring socket is provided. It is a figure which shows the modification of the rubber ring groove with which a rubber ring socket is provided. FIG. 3 is a diagram showing a portion around a rubber ring socket of a rubber ring socket joint including a rubber ring socket according to an embodiment of the present invention. 8 is a diagram showing a state in which the spout of another piping member is inserted straight into the rubber ring socket of FIG. 7. FIG. FIG. 8 is a diagram showing how a spout of another piping member is obliquely inserted into the rubber ring socket of FIG. 7; It is a figure which shows typically the behavior of a rubber ring when the spigot of another piping member is inserted obliquely into the conventional rubber ring socket. FIG. 8 is a diagram schematically showing the behavior of a rubber ring when a spout of another piping member is obliquely inserted into the rubber ring socket of FIG. 7 . FIG. 8 is a diagram showing how the rubber ring socket joint of FIG. 7 is constructed. It is a figure which shows the situation when constructing the drainage collecting pipe which is another example of the piping member provided with a rubber ring socket.

Referring to FIG. 1, a rubber ring socket 10 according to an embodiment of the present invention is applied to a connecting portion of a piping member, and a spigot of another piping member is inserted into this rubber ring socket 10. The connecting portions of the piping members are joined by rubber rings. The rubber ring socket 10 can be applied to the connection parts of various piping members such as pipes, joints, and pipes, and in particular, the socket part is placed near the building frame, such as on the floor, near the ceiling, and against the wall (piping). It is suitable for use in piping members.

As shown in FIG. 1, the rubber ring socket 10 includes a socket main body 12 formed in a cylindrical shape. The socket main body 12 is a part into which a spout of another piping member is inserted, and is made of synthetic resin such as hard vinyl chloride and polyethylene. The inner diameter of the socket main body 12 is set to be slightly larger than the outer diameter of the spigot into which it is inserted.

An annular rubber ring groove 14 extending in the circumferential direction is formed on the inner circumferential surface 12a of the tip of the socket body 12. In this embodiment, a rubber ring groove 14 is formed in the enlarged diameter portion formed at the tip of the socket body 12. Specifically, the rubber ring groove 14 is formed between a short cylindrical base wall portion 20 parallel to the tube axis and a radial direction from both ends of the base wall portion 20 in the tube axis direction (direction perpendicular to the tube axis direction). It is formed by an annular plate-shaped side wall portion (a front side wall portion 22 and a back side wall portion 24) extending in the direction of the front side wall. However, one or both of the front side wall portion 22 and the back side wall portion 24 may be sloped walls that slope away from each other toward the tube axis side.

A water-stopping rubber ring 16 (also referred to as a seal ring) is attached to the rubber ring groove 14. The rubber ring 16 includes a rubber ring main body 30 and a lip portion 32 protruding from the inner peripheral surface of the rubber ring main body 30, and is made of a rubber material such as SBR (styrene butadiene rubber). The rubber ring main body 30 is a portion that is accommodated in the rubber ring groove 14 and comes into close contact with the base wall portion 20, and is formed in a short cylindrical shape (ring shape). On the other hand, the lip part 32 is a part that closely contacts the outer circumferential surface of the socket, and has a truncated conical shape whose diameter gradually decreases from its base end (front side of the socket) to the protruding end side (back side of the socket). It is formed into a cylindrical shape. In addition to the rubber ring 16, a pressing member (not shown) for pressing the rubber ring 16 can also be attached to the rubber ring groove 14.

Furthermore, a space forming portion 18 is formed on the inner circumferential surface 12a of the socket body 12. Referring to FIGS. 2 and 3 together with FIG. 1, the space forming portion 18 is a portion that forms an escape space 18a of the lip portion 32 that communicates with the internal space 14a of the rubber ring groove 14, and It is formed continuously with the inner surface of the side wall portion 24. In this embodiment, the space forming portion 18 is formed by chamfering a portion of the inner circumferential surface 12a of the socket body 12 that is continuous with the back wall portion 24. The inner circumferential surface of this space forming part 18 is formed into an R surface shape (curved surface shape) that smoothly connects the inner circumferential surface of the back side wall part 24 and the inner circumferential surface 12a of the socket body 12 on the back side of the space forming part 18. be done.

Moreover, it is preferable that the space forming part 18 be formed in a circumferential range of not less than one-twelfth of the circumference of the socket body 12 and not more than a half circumference (a central angle of not less than 30 degrees and not more than 180 degrees). This is because if the circumferential range (circumferential length) forming the space forming part 18 is made too large, there is a possibility that the rubber ring 16 will fall. This is because if it is made too small, the escape space 18a of the lip portion 32 cannot be formed appropriately. In this embodiment, a space forming portion 18 is formed in a circumferential range covering one-third of the circumference (120 degrees) of the socket body 12. However, the space forming part 18 can also be provided over the entire circumference of the socket body 12. Further, the volume of the escape space 18a formed by the space forming part 18 is calculated based on the position of the tip of the socket main body 12 and the rubber ring 16, and is stretched by a spigot inserted diagonally into the rubber ring socket 10. The size is set to be equal to or larger than the volume of the lip portion 32.

In addition, in the above-mentioned Example, although the space formation part 18 was formed by chamfering the inner peripheral surface 12a of the socket main body 12, it is not limited to this. For example, as shown in FIG. 4, the space forming part 18 can also be formed by making the tube wall of the socket body 12 into an R shape (curved wall shape). Further, as shown in FIG. 5, the space forming portion 18 can be formed so that the space forming portion 18 and the rubber ring groove 14 form a two-stage groove shape. Further, in the above embodiment, the rubber ring groove 14 is formed in the enlarged diameter portion formed at the tip of the socket body 12, but as shown in FIG. It is not necessary to form twelve enlarged diameter portions.

The rubber ring socket 10 as described above is applied to a connection part of a piping member. FIG. 7 shows an example in which a rubber ring socket 10 is applied to a branch pipe portion 54 of a rubber ring socket joint 50, which is an example of a piping member. As shown in FIG. 7, the rubber ring socket joint 50 is a pipe joint that is installed at the confluence of a drainage vertical pipe and a horizontal drainage pipe in a building. The branch pipe portion 54 protrudes toward the side. The pipe main body 52 of the rubber ring socket joint 50 is piped to the floor slab 70 of the building, and the branch pipe portion 54 (that is, the rubber ring socket 10) is piped along the upper surface of the floor slab 70 (see FIG. 12). ). When applying the rubber ring socket 10 to the branch pipe part 54 of such a rubber ring socket joint 50, the space forming part 18 of the rubber ring socket 10 is a part of the receiving part on the floor slab 70 side (framework side). It is formed at the bottom (lower half) of the mouth body 12.

As shown in FIG. 8, a spigot 62 formed at the end of a drainage horizontal pipe 60 (an example of another piping member) is inserted into the rubber ring socket 10 of the rubber ring socket joint 50. At this time, when the spigot 62 is inserted straight into the rubber ring socket 10, the spigot 62 passes through the rubber ring 16 without the tip of the spigot 62 getting caught on the lip part 32 of the rubber ring 16. do. The rubber ring 16 is compressed between the inner circumferential surface of the rubber ring groove 14 and the outer circumferential surface of the spigot 62, thereby ensuring watertightness during this time.

However, since the rubber ring socket 10 of the rubber ring socket joint 50 is arranged along the upper surface of the floor slab 70, when inserting the spigot 62 into the rubber ring socket 10, it is necessary to As shown, oblique insertion is likely to occur with the tip side of the spigot 62 facing down.

Here, as shown in FIG. 10, in the conventional rubber ring socket 100 without a space forming part, when the spigot 62 is inserted obliquely, the tip of the spigot 62 gets caught on the lip part 106 of the rubber ring 104. The lip portion 106 is stretched, and the lip portion 106 is caught between the tip of the spout 62 and the inner wall of the rubber ring groove 102. If the spigot 62 is forcefully screwed in in this state, the rubber ring 104 will be damaged.

On the other hand, as shown in FIG. 11, in the rubber ring socket 10 including the space forming part 18 of this embodiment, even if the lip part 32 is stretched when the spigot 62 is inserted diagonally, Since the stretched lip portion 32 can enter (escape) into the escape space 18a formed by the space forming portion 18, it is possible to appropriately avoid pinching of the lip portion 32. Furthermore, since the inner circumferential surface of the space forming portion 18 is formed in a rounded shape, the tip of the spigot 62 moves along the rounded line, and the shearing force is alleviated. Therefore, pinching of the lip portion 32 can be more appropriately avoided.

Next, with reference to FIG. 12, a method of constructing piping using a piping member provided with the rubber ring socket 10 will be described. Here, a case of a rubber ring socket joint 50 that employs a rubber ring socket 10 in the branch pipe portion 54 will be described as an example.

As shown in FIG. 12, when constructing drainage piping, first place the pipe body 52 of the rubber ring socket joint 50 (piping member) on the floor slab 70, and also place the space forming part of the rubber ring socket 10. The rubber ring socket joint 50 is piped so that the rubber ring socket joint 18 is located on the floor slab 70 side (lower side that is the building frame side). Next, the spigot 62 of the drainage horizontal pipe 60 (another piping member) is inserted and connected to the rubber ring socket 10 from the opposite side of the floor slab 70 with the rubber ring socket 10 in between, that is, from the upper side. At this time, even if the spout 62 is inserted obliquely into the rubber ring socket 10, since the rubber ring socket 10 has the space forming part 18, it is possible to appropriately avoid the lip part 32 from being caught, and the rubber Damage to the ring 16 is appropriately prevented.

Moreover, FIG. 13 shows the state at the time of construction when the rubber ring socket 10 is applied to the branch pipe portion 82 of the drainage collecting pipe 80, which is another example of the piping member.

In addition, when the rubber ring socket 10 is adopted as the branch pipe part 54 of the rubber ring socket joint 50 (the same applies to the branch pipe part 82 of the drainage collecting pipe 80), the rubber ring socket 10 is connected to the floor slab 70. Since the space forming part 18 is placed on the lower side when piping the rubber ring socket joint 50, the circumferential position where the space forming part 18 is placed is at the bottom of the rubber ring socket 10. It will be changed depending on the piping type. For example, when the rubber ring socket 10 is installed near a wall, the piping member is installed so that the space forming part 18 is located on the wall side (lateral side), and the rubber ring socket is installed from the side opposite to the wall. It is inserted into the socket 10. In addition, when the rubber ring socket 10 is piped near the ceiling, the piping member is piped so that the space forming part 18 is located on the ceiling side (upper side), and the spigot is on the opposite side (lower side) from the ceiling. The rubber ring is inserted into the rubber ring socket 10 through the rubber ring socket 10.

As described above, this embodiment has the space forming part 18 that forms the escape space 18a of the lip part 32, so that the lip part 32 is appropriately prevented from being caught when the spigot 62 is inserted diagonally. be able to. Therefore, damage to the rubber ring 16 can be appropriately prevented.

In addition, since the space forming part 18 is formed in the circumferential range less than half the circumference of the socket body 12, the rubber ring 16 is appropriately prevented from falling, and the lip part 32 is prevented from being caught, thereby preventing the rubber ring 16 from being damaged. Can be appropriately prevented.

Note that the specific numerical values such as the dimensions and the specific shape listed above are merely examples, and can be changed as appropriate depending on the needs of the product specifications and the like.

10...Rubber ring socket 12...Socket body 14...Rubber ring groove 16...Rubber ring 18...Space forming part 50...Rubber ring socket joint (piping member)
60...Drain horizontal pipe (other piping components)
70...Floor slab (building frame)

A first invention is a pipe joint that includes a vertical pipe body and a branch pipe part that projects laterally from the pipe main body, and is provided at a confluence part of a drainage vertical pipe and a horizontal drainage pipe, and the branch pipe part The socket body into which the spout of another piping member is inserted, the rubber ring groove formed on the inner peripheral surface of the socket body, the rubber ring body accommodated in the rubber ring groove, and the inner periphery of the rubber ring body a rubber ring having a lip portion protruding from the surface; and a space formed on the inner circumferential surface of the socket body so as to be continuous with the back wall of the rubber ring groove, and forming an escape space communicating with the inner space of the rubber ring groove. The escape space formed by the space forming part is an escape space of the lip part to avoid the lip part from being pinched by the spigot inserted obliquely into the socket body, and The section is a pipe joint formed only in a part of the circumferential range of the socket body .

In the first invention, the pipe joint includes a vertical pipe main body and a branch pipe portion projecting laterally from the pipe main body, and is provided at a confluence portion of a drainage vertical pipe and a horizontal drainage pipe. The branch pipe section includes a socket body into which a socket for another piping member is inserted. A rubber ring groove is formed on the inner circumferential surface of this socket body, and a rubber ring is attached to this rubber ring groove. The rubber ring has a rubber ring main body that is accommodated in the rubber ring groove, and a lip that projects from the inner circumferential surface of the rubber ring main body. Further, a space forming portion is formed in a part of the circumferential range on the inner circumferential surface of the socket body. This space forming portion is formed in a continuous manner with the inner wall portion of the rubber ring groove, and forms an escape space that communicates with the internal space of the rubber ring groove. In such a rubber ring receptacle, even if the spigot is inserted diagonally and the lip of the rubber ring is stretched by the spigot, the stretched lip will be removed by the relief formed by the space forming part. Since it can enter (escape) into the space, pinching of the lip portion is avoided.

According to the first invention, since the space forming part is provided to form the escape space for the lip part, it is possible to appropriately avoid pinching of the lip part when the spout is inserted obliquely. Further, since the space forming portion is formed only in a part of the circumferential range of the socket body, it is possible to prevent the rubber ring from falling . Therefore, damage to the rubber ring can be appropriately prevented while preventing the rubber ring from falling.

A third invention is dependent on the first or second invention, and the space forming part is formed only at the bottom of the circumferential range of the socket body.

A fourth invention is dependent on the first or second invention, in which the space forming portion is formed only on the side portions of the circumferential range of the socket body.

Claims (5)

A pipe joint comprising a vertical pipe main body and a branch pipe portion protruding laterally from the pipe main body, and provided at a confluence part of a drainage vertical pipe and a horizontal drainage pipe,
The branch pipe portion is
A socket body into which a spout for another piping member is inserted;
a rubber ring groove formed on the inner peripheral surface of the socket body;
a rubber ring having a rubber ring main body accommodated in the rubber ring groove, and a lip portion protruding from an inner circumferential surface of the rubber ring main body; and a back wall portion of the rubber ring groove on the inner circumferential surface of the socket body. a space forming part that is formed in series with and forms an escape space that communicates with the internal space of the rubber ring groove,
The escape space formed by the space forming part is an escape space for the lip part to avoid the lip part being pinched by the spigot inserted obliquely into the socket body. The pipe joint according to claim 1, wherein the inner circumferential surface of the space forming portion is formed in a rounded shape. The pipe joint according to claim 1 or 2, wherein the space forming portion is formed only in a part of the circumferential range of the socket body. The pipe joint according to claim 3, wherein the space forming portion is formed only at the bottom of the circumferential range of the socket body. The pipe joint according to claim 3, wherein the space forming portion is formed only on a side portion of a circumferential range of the socket body.

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