JPH10185035A - Packing for drain pipe connection - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a packing for a drain pipe joint, which can improve execution properties while the excellent sealing capability of each annular tongue piece is being secured by making use of its advantage that its resistance against insertion is small. SOLUTION: A pillow part 7 thick in wall thickness is provided in the inner circumference at the mouth of a packing 1, and it is so constituted that the provision of the pillow part 7 thereby allows a cross branch pipe to be coaxially held in position with respect to the annular tongue pieces 4 through 6 by accepting the connected cross branch pipe from below. By this constitution, since the annular tongue pieces 4 through 6 are pressed into contact with the cross branch pipe uniformly at all times, the inner diameter of each annular tongue pieces 4 through 6 can be increased without obstructing sealing property, and the insertion resistance can thereby be made small.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a packing for connecting a horizontal branch pipe used when connecting a horizontal branch pipe to a drainage pipe joint.

[0002]

2. Description of the Related Art Conventionally, as this kind of packing, there has been one disclosed in, for example, Japanese Utility Model Publication No. 55-5833.

The packing 50 has a substantially cylindrical shape as shown in FIGS. 8 to 10 which are incorporated by reference from the same gazette, and has an inner peripheral side of a horizontal branch pipe connecting pipe portion 51 of a drainage pipe joint and a horizontal branch pipe. The seal 50 is mounted between the outer peripheral side and the outer peripheral side of the seal 52 so that watertightness between them is ensured. According to the packing 50, the horizontal branch pipe 52 can be connected with one touch. The number of parts can be reduced as compared with the case, and the workability of connection can be greatly improved.

[0004]

However, the conventional one-touch packing 50 has the following problems. That is, the insertion amount of the horizontal branch pipe 52 is regulated by abutting the end of the horizontal branch pipe 52 with the pipe stopper 51a provided so as to protrude toward the inner peripheral side of the horizontal branch pipe connection pipe section 51 in the related art. Because of the configuration, it causes abnormal noise, and the drain pipe is extended due to the expansion of the horizontal branch pipe due to the flow of hot drainage or an increase in outside temperature, and the end thereof is pressed against the pipe stopper. Troubles such as cracks in the joints had occurred.

[0005] An annular tongue 50 a is provided on the inner peripheral side of the packing 50, and the annular tongue 50 a is elastically pressed against the outer peripheral surface of the horizontal branch pipe 52 so that the horizontal branch pipe 52 is provided.
The inner diameter of the annular tongue piece 50a is set to about 70% of the outer diameter of the horizontal branch pipe 52. Therefore, the horizontal branch pipe 52 is connected to the horizontal branch pipe connecting pipe portion 5.
1 (Insert the horizontal branch pipe 52 on the inner peripheral side of the packing 50)
At this time, a special lubricant is applied to the annular tongue piece 50a, and then the horizontal tongue piece 50a is elastically deformed and the horizontal branch pipe 52 is pressed into the horizontal branch pipe connection pipe part 51 of the drainage pipe joint. Needed.

Further, when the horizontal branch pipe 52 is connected,
A downward bias load is applied to the packing 50 by its own weight of the lateral branch pipe 52, so that the annular tongue 50 a is not uniformly elastically pressed against the horizontal branch pipe 52, and the packing 50 deteriorates with age. At the same time, it was difficult to ensure watertightness, causing water leakage.

The present invention has been made to solve the problems of these conventional one-touch packings 50, and the first object is to prevent troubles such as generation of abnormal noise due to extension of a horizontal branch pipe or cracking of a drain pipe joint. In addition, when connecting, that is, when inserting the horizontal branch pipe 52, the horizontal branch pipe 52 can be inserted into the inner peripheral side of the packing with a small force without applying a special lubricant to the annular tongue. A second object is to improve connection workability and to suppress deterioration of the packing over time.

[0008]

In order to achieve the first object, the present invention first provides a substantially cylindrical main body which is in close contact with the inner peripheral side of a horizontal branch pipe connecting pipe of a drainage pipe joint. The subject,
A stopper edge for restricting the insertion amount of the lateral branch pipe inserted into the inner peripheral side of the main body is provided on the upper end of the insertion end side end of the main body so as to protrude toward the inner peripheral side. Features.

In order to achieve the second object, the present invention mainly comprises a substantially cylindrical main body which is in close contact with the inner peripheral side of the horizontal branch pipe connecting pipe of the drainage pipe joint. An annular tongue piece elastically pressed against the outer periphery of the horizontal branch pipe is provided on the inner peripheral side, and
A horizontal branch pipe is supported concentrically with respect to the inner periphery of the annular tongue at a lower portion of an end portion on the near side of the insertion of the main body, and the annular tongue is uniformly pressed against the horizontal branch. Characterized in that a muffler portion is provided for holding in a state of being set.

[0010]

According to the above construction, since the insertion amount of the lateral branch pipe is regulated by the stopper rim provided integrally with the packing, there is no need to provide a pipe stopper on the drain pipe joint side as in the prior art. The pipe stopper can be eliminated. From this, the problem of the abnormal noise caused by the collision of the end of the horizontal branch pipe with the pipe stopper in the related art is solved, and the drain pipe joint due to the horizontal branch pipe extending and being pressed against the pipe stopper is eliminated. Eliminates troubles such as cracks.

The horizontal branch pipe is supported concentrically with the annular tongue of the packing by the muffler portion, and this annular tongue is held in a state of being uniformly elastically pressed. From this, even if the inner diameter of the annular tongue is made larger, that is, loosened, as compared with the related art, the sealing property between the packing and the horizontal branch pipe is maintained well, so the inner diameter of the annular tongue is made smaller. It is possible to loosen the tightening margin more than before, thereby connecting the horizontal branch pipe with less force at the time of connection construction and eliminating the trouble of applying a dedicated lubricant etc. .

[0012]

Next, an embodiment of the present invention will be described with reference to FIGS. First, the horizontal branch pipe 5 is connected to the horizontal branch pipe connection packing (hereinafter simply referred to as “packing”) 1 of the present embodiment.
The horizontal branch pipe connection pipe part (hereinafter, simply referred to as “connection pipe part”) 10 of the drainage pipe joint to which the drain pipe 2 is connected will be described. In addition,
Since the horizontal branch pipe 52 does not require any particular change, it will be described with the same reference numerals.

As shown in FIG. 3, the connecting pipe 10 is provided so as to protrude laterally from the body of the drainage pipe joint.
The connecting pipe portion 10 is not provided with a pipe stopper 51a (shown by a two-dot chain line in the figure) for restricting the insertion amount of the horizontal branch pipe 52, which is conventionally provided on the base side thereof. The function of the pipe stopper 51a is performed by a stopper edge 3 provided on the packing 1 as described below.

Now, as shown in FIG.
Is mainly composed of a main body 2 formed by molding a hard rubber into a substantially cylindrical shape.
0 is formed on the inner peripheral side so as to be elastically press-contactable, and is adhered to the inner peripheral side by an adhesive. The outer peripheral surface of the main body 2 is formed to undulate with a very gentle waveform, so that the bonding effect is enhanced and the packing 1 is firmly bonded to the inner peripheral side of the connection pipe 10. It has become.

The inner diameter of the main body 2 is the same as that of the horizontal branch pipe 52.
Is slightly larger (approximately 1.15D) than the outer diameter D, and when the horizontal branch pipe 52 is inserted into the packing 1, an annular space is provided between the horizontal branch pipe 52 and the main body 2. V is formed.

The insertion end side of the main body 2 (the right end side in the drawing,
Above the end of the first inserted side (the same applies hereinafter), a stopper edge 3 is provided that protrudes inwardly in a range that does not obstruct the drainage flow path of the horizontal branch pipe 52. The stopper edge 3 is used to regulate the insertion amount by abutting the end face on the insertion tip side of the horizontal branch pipe 52 as described above, and is formed integrally with the main body 2 by hard rubber. I have.

Next, from the middle of the inner periphery of the main body 2 to the end on the near side of the insertion (the left end in the figure, the side to be inserted later, the same applies hereinafter), the annular tongues 4 to 6 are the same. The overhang is provided over the entire inner circumference. The annular tongues 4 to 6 are provided integrally with the main body 2 or molded separately from the main body 2 with soft rubber and adhered to predetermined positions. The sealing property between the packing 1 and the lateral branch pipe 52 is ensured by elastic pressure contact. Each of the annular tongues 4 to 6 is provided with a horizontal branch pipe 52.
Are provided on the insertion distal end side of the main body 2 so as to be inserted smoothly.

Further, the inner diameter of the annular tongues 4 to 6 is reduced from the near side of the insertion to the tip of the insertion. That is, of the three-stage annular tongues 4 to 6, the inner diameter of the annular tongue 4 located closest to the insertion side and the inner diameter of the central annular tongue 5 are approximately 0. The inner diameter of the annular tongue piece 6 which is formed at a relatively gentle inner diameter of 9D to 0.95D and which is located closest to the insertion distal end is formed to be approximately 0.8D to 0.9D. Is also gentler than the inner diameter (approximately 0.7D) of the annular tongue 50a of the conventional packing 50.

Next, in the lower part on the near side of the insertion of the main body 2,
A muffler portion 7 that protrudes in an arc shape is provided along the inner circumference. As shown in FIG. 2, this muffler portion 2 is provided over a range of approximately 90 ° at the lower portion of the inner periphery of the main body portion 2, and its inner diameter (radius of curvature) substantially matches the outer diameter of the horizontal branch pipe 52. I have. As a result, when the lateral branch pipe 52 is inserted into the inner peripheral side of the packing 1 and its inserted end rests on the muffler section 7, the center of the horizontal branch pipe 52 and the main body 2, that is, the annular tongue pieces 4 to 4 are formed. The center of the horizontal tongue piece 6 is concentrically aligned with the center of the annular tongue piece 4 to 6 so that the annular tongue piece 4 to 6 is uniformly elastically pressed against the outer peripheral surface of the horizontal branch pipe 52.

In the drawing, reference numeral 2a denotes an alignment mark provided at the upper end of the end face on the near side of the insertion of the main body 2;
Reference numeral 2b denotes a detent chamfer formed on the outer periphery of the main body 2 on the insertion tip side.

The packing 1 of the present embodiment configured as described above
Is attached to the inner peripheral side of the connection pipe part 10 using a predetermined adhesive. At this time, the packing 1 is aligned in the circumferential direction using the mark 2a as a mark so that the chamfered portion 2b provided on the insertion distal end side is aligned with the flat portion 10a formed on the inner circumference of the connection pipe portion 10. Then, the packing 1 is mounted in a state where the packing 1 is stopped.

The drainage pipe joint is provided to a construction site with the packing 1 attached thereto. When connecting the horizontal branch pipe 52, the horizontal branch pipe 52 is connected to the inner peripheral side of the packing 1, that is, the annular tongue 4.
It is sufficient to insert the packing 1 into the inner peripheral side of the packing 1 until it comes into contact with the stopper edge 3 of the packing 1, and the connection work of the horizontal branch pipe 52 is completed as described above.

In this embodiment, the packing 1 as described above is used. According to the packing 1, the following operation and effect can be obtained. That is, the stopper edge 3 for regulating the insertion amount of the horizontal branch pipe 52 is provided on the packing 1 side,
It is not provided on the connecting pipe section 10 side as in the related art. For this reason, even if the horizontal branch pipe 52 extends in the axial direction due to heat drainage or an increase in the outside air temperature, the horizontal branch pipe 52 does not
Is not pressed against the pipe stopper 51a, the extension of the horizontal branch pipe 52 is sufficiently allowed, and therefore, the conventional problem such as cracking of the drainage pipe joint is eliminated.
Also, no abnormal noise is generated.

Further, since it is not necessary to provide the conventional pipe stopper 51a on the connecting pipe portion 10 side, the shape thereof is simplified, and the production of the drainage pipe joint (in particular, the work of removing the mold) becomes easy.

As a conventional cylindrical packing used for joining the horizontal branch pipe to the connecting pipe, an annular plate portion made of hard rubber and protruding inward at the end on the insertion tip side. The annular plate portion closes the gap between the end surface of the horizontal branch pipe and the stopper edge provided on the connection pipe portion side, thereby preventing water leakage or eliminating catching of drainage dirt and the like. There was something you did. However, since the annular plate portion in this conventional packing is formed over the entire inner periphery thereof, the annular plate portion obstructs the drain passage depending on the diameter of the connected horizontal branch pipe. Since the regulation of the insertion amount of the branch pipe is still performed by the stopper edge, there is the same problem as described above. On the other hand, in the packing 1 of this embodiment, the stopper edge 3 is provided on the upper end of the insertion end side which does not obstruct the drainage flow path, while the conventional pipe stopper 51a on the connection pipe section 10 side is eliminated. Since the insertion amount of the horizontal branch pipe 52 is regulated by the stopper edge 3, the drainage flow path of the horizontal branch pipe 52 is not obstructed, and cracks in the drain pipe joint due to the extension of the horizontal branch pipe 52 are prevented. It is surely prevented.

Next, the packing 1 of the present embodiment is provided with a muffler portion 7, according to which the horizontal branch pipe 52 is supported from below and the packing 1, that is, the annular tongues 4 to 6 are provided.
The connection is maintained concentrically. Therefore, the annular tongues 4 to 6 are always uniformly and elastically pressed against the lateral branch pipe 52 to ensure a sealing property between them, so that the inner diameter of the annular tongue 50a is tight as in the related art. (Approximately 0.7D), that is, there is no need to set a large interference, and it is relatively moderate (approximately 0.8D to 0.95).
D) It becomes possible to reduce the interference by forming. Accordingly, when inserting the horizontal branch pipe 52 into the inner peripheral side of the packing 1, there is no need to apply a lubricant to the annular tongue piece 50a and press-fit it with a large force as in the related art, and it is easy to insert with a small force. Therefore, the sealability of the packing 1 can be maintained well, and the workability of connecting the lateral branch pipe can be remarkably improved.

The inner diameter of the main body 2 is formed slightly larger than the outer diameter D of the horizontal branch pipe 52 (generally 1.15D), and an annular space is provided between the horizontal branch pipe 52 and the main body 2. V is formed. According to the space portion V, the horizontal branch pipe 52 can be slightly tilted up and down with the muffler section 7 as a fulcrum, so that the horizontal branch pipe 52 can be connected with a slight gradient. Since a slight misalignment between the horizontal branch pipe 52 and the connecting pipe section 10 is absorbed, workability can be improved also in this regard. Also in this case, it is the same that the sealing property between the horizontal branch pipe 52 and the connection pipe section 10 is maintained well.

FIGS. 4 to 7 show another embodiment of the present invention, in which a horizontal branch pipe 52 'having an outer diameter of about half of the horizontal branch pipe 52 can be connected to the connection pipe section 10. FIG. Is shown.

The packing 20 includes an outer ring portion 21 that can be in close contact with the inner peripheral side of the connection pipe portion 10, and an inner ring portion 22 that is formed integrally with a lower portion of the outer ring portion 21. The space between the inner ring portion 22 and the inner ring portion 22 is closed by a shielding edge 23 in a watertight manner.

The outer peripheral surface of the outer ring portion 21 is formed in a gentle wavy shape like the outer peripheral surface of the main body portion 2 in order to enhance the bonding effect. Further, similarly to the main body 2, the mark 2
1a and a chamfer 21b are formed. The inner ring portion 22 includes a stopper edge 24, annular tongue pieces 25 to 27,
8 is provided in the same manner as the packing 1.

Also with this packing 20 for different diameter pipes, the amount of insertion of the lateral branch pipe 52 'is restricted by the stopper edge 24, and the lateral branch pipe 52' is supported concentrically with the inner ring part 22 by the muffler portion 28 so as to be annular. Since the tongue pieces 25 to 27 are uniformly elastically pressed against the lateral branch pipe 52 ', the annular tongue pieces 25 to 2
The inner diameter of 7 can be made looser than before, thereby improving the workability at the time of connection. further,
By forming the inner diameter of the inner ring portion 22 larger than the outer diameter of the lateral branch tube 52 'by a certain dimension, an annular space V' is provided between the horizontal branch tube 52 'and the inner ring portion 22. By using the space V ', the same operation and effect as described above can be obtained.

In the embodiment described above, the case where the annular tongues 4 to 6 or 25 to 27 are provided in three stages is exemplified. However, the present invention is not limited to this. One stage, two stages, or four or more stages may be provided.

[0033]

According to the present invention, since the stopper edge for regulating the insertion amount of the lateral branch pipe is provided on the packing side and the one conventionally provided on the drain pipe joint side is eliminated, the horizontal branch pipe has a hot drain. Even when the horizontal branch pipe is extended, it is not pressed into contact with the drainage pipe joint. Therefore, it is possible to eliminate problems such as cracks in the drainage pipe joint and generation of abnormal noise due to the extension of the horizontal branch pipe.

Also, the provision of the muffler portion allows the lateral branch pipe to be connected and held concentrically to the packing so that the annular tongue is uniformly elastically pressed against the packing, so that the inner diameter of the annular tongue is enlarged and tightened. The margin can be reduced, whereby the horizontal branch pipe can be inserted into the inner peripheral side of the packing with a small force, and the workability thereof can be remarkably improved.

Further, the annular tongue is always uniformly elastically pressed against the lateral branch pipe, so that an unbalanced load is not applied to the annular tongue due to the weight of the horizontal branch pipe as in the related art. Therefore, deterioration of the sealing property of the packing due to aging is suppressed, and the life thereof can be extended.

Further, by utilizing the space formed between the packing and the horizontal branch pipe, the horizontal branch pipe can be connected to the drainage pipe joint with the horizontal branch pipe having an appropriate gradient. In addition, it is possible to absorb the slight axial misalignment of the horizontal branch pipes and connect the pipes, and in this regard, the connection workability can be improved.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a packing for connecting a horizontal branch pipe according to an embodiment of the present invention.

FIG. 2 is a front view of a packing for connecting a lateral branch pipe, as viewed in the direction of arrow A in FIG. 1;

FIG. 3 is a longitudinal sectional view of a horizontal branch pipe connecting pipe portion in a state where the horizontal branch pipe is connected.

FIG. 4 is a vertical cross-sectional view of a packing for connecting a horizontal branch pipe of another embodiment, which is a packing for connecting different-diameter pipes.

FIG. 5 is a front view of the packing for connecting different diameter pipes.

FIG. 6 is a rear view of the packing for connecting different diameter pipes.

FIG. 7 is a vertical cross-sectional view of a horizontal branch pipe connecting pipe portion in a state where small-diameter horizontal branch pipes are connected using packing for connecting different diameter pipes.

FIG. 8 is a longitudinal sectional view of a conventional packing.

FIG. 9 is a partial vertical cross-sectional view of a horizontal branch pipe connecting pipe portion with the packing attached.

FIG. 10 is a partial vertical cross-sectional view of a horizontal branch pipe connecting pipe portion in a state where the horizontal branch pipe is connected using a conventional packing.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Packing for horizontal branch pipe connection 2 ... Main body part 3 ... Stopper edge 4-6 ... Annular tongue piece 7 ... Macula part 10 ... Horizontal branch pipe connection pipe part 20 ... Packing for connecting different diameter pipe (packing for horizontal branch pipe connection) V: space portion D: outer diameter of horizontal branch pipe 50: conventional packing for horizontal branch pipe connection, 50a: annular tongue 51: horizontal branch pipe connection pipe section, 51a: pipe stopper 52: horizontal branch pipe

[Procedure amendment]

[Submission date] October 1, 1997

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction contents]

[Document Name] Statement

[Title of the Invention] Packing for drainage pipe connection

[Claims]

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drain pipe connecting packing used for connecting a horizontal branch pipe to a receptacle of a drain collecting pipe joint, for example.

[0002]

2. Description of the Related Art Conventionally, as this kind of packing, there has been one disclosed in, for example, Japanese Utility Model Publication No. 55-5833.
This packing 50 is shown in FIG.
As shown in FIG. 15, the drain pipe joint is attached between the inner peripheral side of the horizontal branch pipe receiving port 51 of the drainage pipe joint and the outer peripheral side of the horizontal branch pipe 52 to ensure watertightness between them. According to this packing 50, the horizontal branch pipe 52 can be connected with one touch (only inserted on the inner peripheral side), so that the number of parts is reduced as compared with the case of a conventional mechanical joint or the like. In addition, the workability of the connection was greatly improved.

[0003]

However, the conventional packing 50 has the following problems.
That is, the annular tongue piece 5 is provided on the inner peripheral side of the conventional packing 50.
0a is provided, and this annular tongue 50a is
2 is elastically pressed against the outer peripheral surface of the horizontal branch pipe 52 to ensure watertightness between the horizontal branch pipe 52 and the annular tongue piece 50a.
Is set to about 70% of the outer diameter of the horizontal branch pipe 52. For this reason, when connecting the horizontal branch pipe 52 to the receiving port 51 (inserting the horizontal branch pipe 52 into the inner peripheral side of the packing 50), a special lubricant is applied to the annular tongue 50a, and the like. It was necessary to press-fit the horizontal branch pipe 52 into the horizontal branch pipe connection pipe part 51 of the drainage pipe joint while elastically deforming the tongue piece 50a. Also, when the horizontal branch pipe 52 is inserted into the inner peripheral side of the packing 50, the horizontal branch pipe 52 is usually once placed on the lower inner peripheral side of the receiving port 51 and pushed in as it is. The lower part of 50 (particularly the annular tongue 50a) is
2 was crushed and damaged by its own weight, resulting in problems such as water leakage.

Further, in the connection state of the horizontal branch pipe 52,
The annular tongue piece 50a of the packing 50 needs to be uniformly pressed against the horizontal branch pipe 52, and for this purpose, the horizontal branch pipe 52 needs to be held concentrically with the annular branch piece 50a.
Since the packing 50 is subjected to a downward biased load due to the weight of the lateral branch pipe 52, the packing tends to be misaligned, and the deterioration over time is large. As a result, it is difficult to ensure watertightness, which causes water leakage. There was a problem.

The present invention has been made to solve these problems of the conventional packing, and has a low insertion resistance at the time of connection of the drainage pipe and no damage at the time of pipe connection.
An object of the present invention is to provide a drainage pipe connection packing that can easily ensure watertightness.

[0006]

According to a first aspect of the present invention, there is provided a packing having a mouth portion closely adhered along an inner periphery of a receiving port, and an elastic portion formed on the outer peripheral surface of the drain pipe by projecting inward from the mouth portion. A packing provided with an annular tongue piece to be pressed against, wherein a thick wall portion is provided on an inner periphery of a lower portion of the mouth portion, and the drainage pipe is concentrically held with respect to the annular tongue portion by the macula portion. It is characterized by a possible configuration.

According to this packing, the drainage pipe is held by the macula portion in a position concentric with the annular tongue of the packing, and this annular tongue is held in a state of being uniformly elastically pressed.
From this, even if the inner diameter of the annular tongue is made larger or loosened compared to the conventional one, the sealing property between the packing and the drainage pipe is maintained well, so that the inner diameter of the annular tongue is conventionally made smaller. It can be loosened and the interference can be reduced, so that the drain pipe can be inserted into the inner circumference of the packing with less force during connection construction, so that a special lubricant is applied as before The drain pipe can be easily connected without troublesome work. Further, when the tube is inserted into the receptacle, the tube can be once put on the muffler portion, so that the conventional workability is not impaired.
Since the macula part is formed to be thick, it can receive the weight of the pipe, which prevents the annular tongue from being pinched and crushed by the weight of the pipe, and thus prevents damage to the packing. it can.

A packing according to a second aspect of the present invention is the packing for drainage pipe connection according to the first aspect, wherein the inner diameter of the mouth portion is formed to have an appropriate diameter larger than the outer diameter of the drainage pipe to be connected. An annular space portion is provided between the portion and the drainage pipe, and the space portion is used to incline the drainage pipe with respect to the receptacle with the macula portion as a fulcrum while ensuring the watertight state of the annular tongue piece. It is characterized in that it is configured to be connectable in a state where it has been set.

According to this packing, the drain pipe can be connected to the receiving port with a slight gradient, and a slight misalignment between the drain pipe and the receiving port (both axes are not aligned). (Intersecting state) can be corrected, so that workability can be improved in this respect.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS.
This will be described with reference to FIG. In the present embodiment, as shown in FIG. 3, the packing 1 used when the horizontal branch pipe 52 is connected to the receptacle 10 of the drainage pipe joint will be described as an example. Since the horizontal branch pipe 52 does not require any particular change, the same reference numeral is given.

First, as shown in FIG. 3, the receiving port 10 is provided so as to protrude laterally from the body of the drainage pipe joint. The receptacle 10 is not provided with a pipe stopper 51a (indicated by a two-dot chain line in the figure) for restricting the insertion amount of the horizontal branch pipe 52, which is conventionally provided on the base side thereof. The function of the stopper 51a is performed by the stopper edge 3 provided on the packing 1 as described below.

Now, as shown in FIG.
Is mainly composed of a main body 2 formed by molding a hard rubber into a substantially cylindrical shape.
Is formed to have an outer diameter that can be elastically pressed against the inner peripheral side of the base member, and is bonded to the inner peripheral side by an adhesive. The outer peripheral surface of the main body 2 is formed so as to undulate with a very gentle waveform, whereby the adhesive effect is enhanced, and the packing 1 is firmly adhered to the inner peripheral side of the receiving port 10. ing.

The inner diameter of the main body 2 is the same as that of the horizontal branch pipe 52.
Is slightly larger (approximately 1.15D) than the outer diameter D, and when the horizontal branch pipe 52 is inserted into the packing 1, an annular space is provided between the horizontal branch pipe 52 and the main body 2. V is formed.

The insertion end side of the main body 2 (the right end side in the drawing,
Above the end of the first inserted side (the same applies hereinafter), a stopper edge 3 is provided that protrudes inwardly in a range that does not obstruct the drainage flow path of the horizontal branch pipe 52. The stopper edge 3 is used to regulate the insertion amount by abutting the end face on the insertion tip side of the horizontal branch pipe 52 as described above, and is formed integrally with the main body 2 by hard rubber. I have.

Next, annular tongue pieces 4 to 6 project over the entire inner circumference of the end of the main body 2 on the near side of insertion (left end in the figure, hereinafter this part is particularly referred to as “mouth 2A”). It is provided in the shape. The annular tongues 4 to 6 are provided integrally with the main body 2 or molded separately from the main body 2 with soft rubber and adhered to predetermined positions. The sealing property between the packing 1 and the lateral branch pipe 52 is ensured by elastic pressure contact. Each of the annular tongues 4 to 6 is provided to be inclined toward the back side of the main body 2 so that the horizontal branch pipe 52 can be inserted smoothly.

As shown, the inner diameter of the annular tongues 4 to 6 gradually decreases toward the back side from the mouth side. That is, of the three annular tongue pieces 4 to 6, the inner diameter of the annular tongue piece 4 located closest to the mouth and the center annular tongue piece 5 is approximately 0.9 D with respect to the outer diameter D of the horizontal branch pipe 52. ~ 0.9
The inner diameter of the annular tongue 6 located at the innermost side is formed to be approximately 0.8D to 0.9D, and the inner diameter of the annular tongue 6 is also the conventional packing 5.
The inner diameter of the annular tongue piece 50a at 0 is smaller (approximately 0.7D).

Next, a thick muffler portion 7 is provided below the mouth portion 2A so as to protrude in an arc along the inner circumference. As shown in FIG.
A is provided in the lower part of the inner circumference of A over a range of approximately 90 °, and its inner diameter (radius of curvature) substantially matches the outer diameter of the horizontal branch pipe 52. As a result, when the lateral branch pipe 52 is inserted into the inner peripheral side of the packing 1 and its inserted end is placed on the muffler portion 7, the horizontal branch pipe 52 is moved to the annular tongue pieces 4 to 4.
6 and concentrically with respect to the annular tongue 4
6 are elastically pressed against the outer peripheral surface of the horizontal branch pipe 52 uniformly in the circumferential direction.

In the drawing, reference numeral 2a denotes an alignment mark provided at the upper end of the end face of the mouth 2A, and 2b denotes a main body 2a.
Is a chamfered portion formed on the outer periphery on the insertion tip side for preventing rotation.

The packing 1 of the present embodiment thus configured is
It is attached to the inner peripheral side of the receptacle 10 by using a predetermined adhesive. At this time, the positioning of the packing 1 in the circumferential direction is performed using the mark 2a as a mark, and the packing 1 is inserted so that the chamfered portion 2b provided on the insertion distal end side is aligned with the flat portion 10a formed on the inner periphery of the receiving port 10. , Thereby the packing 1
Is installed in a state where it is stopped.

The drainage pipe joint is provided to the construction site with the packing 1 attached. When connecting the horizontal branch pipe 52, the horizontal branch pipe 52 is connected to the inner peripheral side of the packing 1, that is, the annular tongue 4.
It is sufficient to insert the packing 1 into the inner peripheral side of the packing 1 until it comes into contact with the stopper edge 3 of the packing 1, and the connection work of the horizontal branch pipe 52 is completed as described above.

According to the packing 1 of the present embodiment configured as described above, the stopper edge 3 for restricting the insertion amount of the lateral branch pipe 52 is provided on the packing 1 side, and the receiving port 10 is formed as in the conventional case. It is not provided on the side. Therefore, even if the horizontal branch pipe 52 extends in the axial direction due to heat drainage or an increase in outside air temperature, the horizontal branch pipe 52 does not come into pressure contact with the pipe stopper 51a as in the related art. The extension of the branch pipe 52 is sufficiently allowed, so that the conventional problem such as cracking of the drainage pipe joint is eliminated, and no abnormal noise is generated.

Further, since it is not necessary to provide the conventional pipe stopper 51a on the side of the receiving port 10, the shape thereof is simplified, and the production of the drainage pipe joint (particularly, the operation of removing the mold) is facilitated, and the production cost is reduced. Can be planned.

In addition, as a conventional substantially cylindrical packing used for joining a lateral branch pipe to a receiving port, an annular plate made of hard rubber is provided at the end of the insertion tip side, which is made to protrude inward. The annular plate portion closes the gap between the end face of the horizontal branch pipe and the stopper edge provided on the receiving port side, thereby preventing water leakage or eliminating catching of drainage dirt and the like. there were. However, since the annular plate portion in this conventional packing is formed over the entire inner periphery thereof, the annular plate portion obstructs the drain passage depending on the diameter of the connected horizontal branch pipe. Since the regulation of the insertion amount of the branch pipe is still performed by the stopper edge, there is the same problem as described above. In contrast, the packing 1 of the present example
The stopper edge 3 is provided at the upper end of the insertion end side which does not hinder the drainage flow path, while the conventional pipe stopper 51a on the receiving port 10 side is eliminated. , The drain passage of the horizontal branch pipe 52 is not obstructed, and the horizontal branch pipe 5
Cracks and the like of the drainage pipe joint due to the extension of 2 are surely prevented.

Next, according to the macula part 7 provided at the lower part of the mouth part 2A, the horizontal branch pipe 52 is supported from below and is held concentrically with the annular tongue pieces 4 to 6. . Therefore, the annular tongues 4 to 6 are always uniformly and elastically pressed against the lateral branch pipe 52 to ensure a sealing property between them, so that the inner diameter of the annular tongue 50a is tight as in the related art. (Approximately 0.7D), that is, there is no need to set a large interference, and it is relatively moderate (approximately 0.8D
0.95D) to reduce the interference. Thereby, the horizontal branch pipe 52 is connected to the packing 1.
When inserted in the inner peripheral side of the tongue, the annular tongue 50a
It is not necessary to apply a lubricant to the cylinder and press-fit it with a large force, and it is possible to easily insert it with a small force, so that the sealability of the packing 1 is ensured and the workability of connecting the horizontal branch pipe is remarkably improved. be able to.

The inner diameter of the main body 2 and the mouth 2A is slightly larger than the outer diameter D of the horizontal branch pipe 52 (generally 1.15).
D) An annular space V is formed between the horizontal branch pipe 52 and the horizontal branch pipe 52.
Is formed. According to the space portion V, the horizontal branch pipe 52 can be slightly inclined in the vertical direction with the muffler section 7 as a fulcrum, so that the horizontal branch pipe 52 can be connected with a slight gradient. In addition, according to this, even if there is a slight misalignment between the horizontal branch pipe 52 and the receiving port 10 (a state where both axes intersect), this can be absorbed (corrected). The workability of pipe connection can be improved. Also in this case, it is the same that the sealing property between the horizontal branch pipe 52 and the receiving port 10 is maintained well.

Various modifications can be made to the embodiment described above. For example, FIGS. 4 to 7 show a small-diameter horizontal branch pipe 5 having an outer diameter of about half of the horizontal branch pipe 52.
2 shows a packing 20 for a different-diameter pipe that allows 2 ′ to be connected to the receptacle 10.

The packing 20 includes an outer ring portion 21 that can be in close contact with the inner peripheral side of the receiving port 10, and an inner ring portion 22 that is inscribed and integrally formed below the outer ring portion 21.
The space between the inner ring part 1 and the inner ring part 22 is closed by a shielding edge 23 in a watertight manner.

The outer peripheral surface of the outer ring portion 21 is formed in a gentle wavy shape like the outer peripheral surface of the main body portion 2 in order to enhance the bonding effect. Further, similarly to the above embodiment, the outer ring portion 21
A mark 21a is formed on the upper end of the mouth side, and a chamfered portion 21b is formed on the upper end of the outer ring portion 21 on the insertion end side.

On the other hand, a stopper edge 24 having the same function as that of the above-described embodiment is formed on the insertion end side of the inner ring portion 22, and annular tongue pieces 25 to 25 are formed on the inner peripheral side of the mouth portion 22A.
27 is formed over the entire circumference, and a thick-walled muffler portion 2 is formed in an arc shape at the lower portion of the inner periphery of the mouth portion 22A.
8 is provided in the same manner as the packing 1.

Also with the packing 20 for the different diameter pipe, the amount of insertion of the lateral branch pipe 52 'is regulated by the stopper edge 24, and the lateral branch pipe 52' is supported by the muffler section 28 concentrically with the inner ring part 22. Since the annular tongues 25 to 27 are uniformly elastically pressed against the lateral branch pipe 52 ', the annular tongues 25 to 2
The inner diameter of 7 can be made looser than before, thereby improving the workability at the time of connection. further,
By forming the inner diameter of the inner ring portion 22 larger than the outer diameter of the lateral branch tube 52 'by a certain dimension, an annular space V' is provided between the horizontal branch tube 52 'and the inner ring portion 22. By using the space V ', the same operation and effect as described above can be obtained.

In the embodiment described above, the case where the annular tongues 4 to 6 or 25 to 27 are provided in three stages is exemplified. However, the present invention is not limited to this. One stage, two stages, or four or more stages may be provided.

Further, the above-described exemplary muffler portion 7 (28)
Has exemplified a configuration in which a cladding is formed in an arc shape along the inner periphery of the mouth portion 2A (22A). However, as shown in FIGS. Part 3
0, or a macula portion 31 having a shape combining an arc-shaped portion 31a and a horizontal surface portion 31b. In short, the connected drainage pipe is received from below and the drainage pipe is concentrically held with respect to the annular tongue. Any shape is possible.

Next, FIGS. 9 to 12 show packings 40 to 43 of still other forms. The packing 40 shown in FIG. 9 has a substantially cylindrical main body 40a, but does not have the stopper edge as exemplified above. A muffler portion 40c can be formed on the inner periphery of the lower portion of the mouth portion 40b of the packing 40. The mouth 40
An annular tongue piece 40d is formed over the entire circumference on the inner circumference of b.

The packing 41 of FIG.
a, but no stopper edge. An annular tongue piece 41d is formed on the entire inner periphery of the mouth portion 41b of the packing 41, and an arc-shaped muffler portion 41c is formed on the inner periphery of the lower portion of the mouth portion 41b.

Further, the packing 42 shown in FIG.
The main body portion is not a cylindrical shape, but only an annular mouth portion 42a, and therefore does not have a stopper edge. Lip 4
An annular tongue piece 42b and a muffler portion 42c are provided on the inner peripheral side of 2a. As described above, the muffler portion can be applied to various types of packing, and any of the packings can provide the same operation and effect as described above.

FIG. 12 shows a packing 43 of still another form. FIG. 12A shows this packing 43.
Into the socket 44 of the pipe joint,
3 shows a state in which a drain pipe 45 is connected to the inner peripheral side.
The packing 43 does not have the main body as exemplified above, and the lip 4 attached to the inner periphery of the lip of the receptacle 44.
3a. An annular tongue piece 4 projecting obliquely toward the inner peripheral side is provided at the far end (mounting end side) of the mouth 43a.
3b and an engaging tongue piece 43c projecting obliquely toward the outer periphery are integrally formed. The drain pipe 45 is provided with the annular tongue piece 43b.
Is inserted into the deep portion of the receiving port 44 while spreading, whereby the annular tongue piece 43b is brought into close contact with the outer peripheral surface of the drain pipe 45, and its sealing property is secured. In addition, the engagement tongue piece 43c
Is hookedly engaged with an engagement step portion 44 a formed on the inner periphery of the receiving port 44, whereby the packing 43 is prevented from coming off. This engaging tongue piece 43c
Can prevent the packing 43 from coming off from the receptacle 44 together when the drainage pipe is pulled out from the receptacle 44 in order to renew the drainage pipe, thereby improving this kind of workability. it can. A muffler portion 43f is also provided below the mouth of the packing 43. As shown in FIG. 12 (B), this muffler portion 43f is also formed so as to be slightly overhanging on the inner peripheral side within a range of about 90 ° along the lower inner periphery. It works. In addition, the muffler portion 43f is illustrated as having an arc shape,
It may be formed in a horizontal plane as shown in FIG.

The end of the mouth portion 43a on the rear end side of the mounting portion has a flange portion 4 projecting to the outer peripheral side over the entire circumference.
3d is formed, and from the outer peripheral side of the flange portion 43d, a folded portion 43e is also integrally formed in a folded shape to the mounting tip side (left side in the drawing) over the entire circumference. When the packing 43 is mounted, the flange 43 d is
4, the packing 43 is prevented from being pushed in when the drain pipe is inserted. Further, the folded portion 43e is pressed against the outer peripheral surface of the receiving port 44 by its elastic force, and the end of the receiving port 44 is sandwiched between the folded portion 43e and the lip portion 43a. The escape is prevented. Further, a step 4 is also provided on the outer peripheral side of the mouth of the receiving port 44 corresponding to the folded portion 43e.
4b is formed over the entire circumference. The packing 4
The third folded portion 43e is positioned so as to fit into the step 44b, so that the outer peripheral surface of the receiving port 44 and the outer peripheral surface of the folded portion 43e are flush with each other. As described above, since the packing 43 does not protrude from the outer peripheral surface of the receiving port 44, for example, at the time of piping construction or the like, other problems such as tools are caught and the packing 43 is not displaced or dislocated. It has become. A metal cover 43g is attached to the outer surfaces of the flange portion 43d and the folded portion 43e, and the cover 43g covers a so-called apparent portion of the packing 43 to take fire prevention measures.

Lastly, in each of the embodiments described above, the packing used when connecting the horizontal branch pipe to the receptacle of the drainage pipe joint is exemplified. However, when the drainage pipe is connected to various other types of pipe joints. It goes without saying that it can be widely applied to:

[0039]

According to the first aspect of the present invention, the drainage pipe is held concentrically with respect to the packing by providing the muffler portion on the lower inner periphery of the mouth portion, whereby the annular tongue is drained. Since it is uniformly elastically pressed against the pipe, the inner diameter of the annular tongue piece can be increased to reduce the interference, so that the horizontal branch pipe can be inserted into the inner peripheral side of the packing with a small force. And the workability can be remarkably improved.

Further, the annular tongue is always uniformly elastically pressed against the lateral branch pipe, so that the partial load is not applied to the annular tongue by the weight of the horizontal branch pipe as in the related art. Therefore, deterioration of the sealing property of the packing due to aging is suppressed, and the life thereof can be extended.

According to the second aspect of the present invention, by utilizing the space formed between the packing and the drainage pipe, the drainage pipe is connected to the drainage pipe with the drainage pipe having an appropriate gradient. Can be connected, and furthermore, it is possible to connect by absorbing a slight misalignment of the drain pipe, and in this regard, the connection workability can be improved.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of the present invention, and is a longitudinal sectional view of a packing.

FIG. 2 is a front view of the packing, as viewed in the direction of arrow A in FIG. 1;

FIG. 3 is a longitudinal sectional view of a receptacle to which a horizontal branch pipe is connected.

FIG. 4 is a longitudinal sectional view of a packing for connecting different diameter pipes.

FIG. 5 is a front view of a packing for connecting different-diameter pipes.

FIG. 6 is a rear view of the packing for connecting different diameter pipes.

FIG. 7 is a longitudinal sectional view of a receiving port to which a small-diameter horizontal branch pipe is connected using packing for connecting different-diameter pipes.

FIG. 8 is a front view of a packing having a muffler portion in another form, wherein (A) is a packing having a horizontal muffler portion,
(B) shows a packing having a macula portion in which a horizontal surface portion and an arc-shaped portion are combined.

FIG. 9 is a view showing a packing of another embodiment, the left side is a longitudinal sectional view, and the right side is a front view.

FIG. 10 is a view showing another form of packing, in which the left side is a longitudinal sectional view and the right side is a front view.

FIG. 11 is a view showing another form of packing, in which the left side is a longitudinal sectional view and the right side is a front view.

12A and 12B are diagrams showing a packing of another embodiment, wherein FIG. 12A is a longitudinal sectional view showing a state where the packing is attached to a receptacle, and FIG. 12B is a front view.

FIG. 13 is a longitudinal sectional view of a conventional packing.

FIG. 14 is a partial vertical cross-sectional view of a horizontal branch pipe receiving port with the packing attached.

FIG. 15 is a partial longitudinal sectional view of a horizontal branch pipe receiving port in a state where the horizontal branch pipe is connected using a conventional packing.

[Description of Signs] 1,20,41-42 packing 2 body part 2A mouth 3 stopper edge 4-6 annular tongue 7,28,30,31,40c, 41c, 42c, 43
f: Macula section 10: Horizontal branch pipe receiving port 20: Packing for connecting different diameter pipes (packing for horizontal branch pipe connection) 22A: Mouth section V: Space section D: Outer diameter of horizontal branch pipe 50: For connecting conventional horizontal branch pipe Packing 51a: Pipe stopper

[Procedure amendment 2]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

FIG. 2

FIG. 11

FIG. 13

FIG. 3

FIG. 4

FIG. 5

FIG. 6

FIG. 7

FIG. 8

FIG. 9

FIG. 10

FIG.

FIG. 14

FIG.

Claims (3)

[Claims] The main body is a substantially cylindrical main body that is in close contact with the inner peripheral side of a horizontal branch pipe connecting pipe part of a drainage pipe joint. A packing for connecting a horizontal branch pipe in a drainage pipe joint, wherein a stopper edge for restricting an insertion amount of a horizontal branch pipe inserted into an inner peripheral side of the portion is provided so as to protrude toward an inner peripheral side. 2. A substantially cylindrical main body which is in close contact with the inner peripheral side of the horizontal branch pipe connecting pipe part of the drainage pipe joint, and the inner peripheral side of the main body part is elastically pressed against the outer periphery of the horizontal branch pipe. A horizontal branch pipe is supported concentrically with respect to the inner periphery of the annular tongue at a lower portion of the end on the near side of the insertion of the main body. A packing for connecting a horizontal branch pipe in a drainage pipe joint, comprising a muffler portion for holding a piece in a state of being uniformly pressed against the horizontal branch pipe. 3. An inner space of the main body is formed to have an appropriate diameter larger than an outer diameter of the horizontal branch pipe, and an annular space is provided between the main body and the horizontal branch pipe. The horizontal branch pipe can be connected to the horizontal branch pipe connecting pipe section in an inclined state with the macula section as a fulcrum in a state where watertightness is secured by the annular tongue piece. 3. A packing for connecting a horizontal branch pipe in the drainage pipe joint according to 2.