JP2505345B2 - Drainage stack fitting - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drainage stack pipe joint for connecting a lateral branch pipe to a drainage stack pipe.

[0002]

2. Description of the Related Art Conventionally, a drainage vertical pipe joint (hereinafter, simply referred to as "pipe joint") 60, a vertical pipe 61 or a lateral branch pipe 62.
The connection with was made as shown in FIG.

That is, an annular tightening flange 63 and a packing 64 are attached to the stand pipe 61, and the stand pipe 61 is mounted.
Is inserted into the vertical pipe connecting pipe portion 60a of the pipe joint 60, and then the tightening flange 63 is tightened in the axial direction of the connecting pipe portion 60a using bolts 66 to 66, and the packing 64 is set upright with the connecting pipe portion 60a. The vertical pipe 61 was able to be connected to the pipe joint 60 while ensuring the watertightness by pressing the pipe 61 against the pipe 61 and closely fitting the pipe 61.

Further, a cap nut 65 and a packing 67 are attached to the lateral branch pipe 62 to connect the lateral branch pipe 62 to the lateral branch pipe connecting pipe portion 6
0b, and after that, the cap nut 65 is tightened and the packing 67 is pressed between the connecting pipe portion 60b and the lateral branch pipe 62 so as to be tightly attached to the lateral branch pipe 62.
Was able to be connected to the watertightly.

[0005]

As described above, conventionally, the packings 64 and 67 are formed by using the tightening member such as the tightening flange 63 or the cap nut 65, and the vertical pipe 61 and the connecting pipe portion 6 are provided.
0a or the side branch pipe 62 and the connecting pipe portion 60b are pressed closely to connect the stand pipe 61 or the side branch pipe 62 to the pipe joint 60. Therefore, the tightening member is separately prepared. Therefore, the work for tightening them is required, and the work is troublesome and the workability is not good.

Moreover, in order to form a screw hole or screw thread for tightening the tightening member such as the tightening flange 63 or the cap nut 65, the connecting pipe parts 60a, 6 are formed.
It is necessary to form brims 68 and 69 on the outer periphery of the tip of 0b.

Here, in the case of integrally forming the brim on the connecting pipe portion for the lateral branch pipe, depending on the position where the connecting pipe portion is arranged, it is impossible to mold with a single mold. Figure 2
As shown in FIG. 2, it is necessary to perform casting by using the combination core 70, which causes a problem that the casting process of the pipe joint is complicated and the manufacturing cost is high.

For this reason, conventionally, the connecting pipe portion of the pipe joint has to be set within a range in which casting can be performed without using the combination core 70. Therefore, variations regarding the connecting pipe portion of the pipe joint are limited, and eventually, the connecting pipe portion of the pipe joint is limited. It was one of the obstacles in improving workability.

The present invention has been made in view of these conventional problems, and the work of tightening the tightening member can be eliminated to improve the workability, and at the same time, the connecting pipe portion can be manufactured without increasing the manufacturing cost. To provide a drainage vertical pipe joint that can eliminate the design constraint relating to the arrangement and thereby prepare a pipe joint having various types of connection pipe portions, and can also improve the workability in this respect. With the goal.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the present invention, at least the lateral branch pipe connecting pipe portion of the connecting pipe portion has a gentle taper whose inner and outer diameters are smaller on the mouth side than on the base side. The vertical pipe or the lateral branch pipe is watertightly connected to each of the connecting pipe portions through a packing having a cylindrical shape of a loose taper which can be closely attached to the inner peripheral surface of the connecting pipe portion. It is characterized by

[0011]

According to the above construction, at least the lateral branch pipe is watertightly connected to the connecting pipe portion through the packing closely attached to the inner peripheral surface of the connecting pipe portion. More specifically, this packing is configured such that the collar edge is brought into contact with the mouth end surface of the connecting pipe portion before connecting the vertical pipe or the lateral branch pipe, and the mouth of the connecting pipe portion is provided between the ear piece and the peripheral surface. Is sandwiched between and is closely attached to the inner peripheral surface of the connecting pipe portion, and then the stand pipe or the lateral branch pipe is inserted and connected to the inner peripheral side of the packing. At this time, since the tongue-shaped piece that is formed to extend to the inner peripheral side of the packing is elastically pressed against the entire circumference of the peripheral surface of the vertical pipe or the lateral branch pipe, the packing is used by using a fastening member as in the conventional case. The vertical pipe or the lateral branch pipe is watertightly connected to the drainage vertical pipe joint without being pressed between the lateral branch pipe and the connecting pipe portion. Therefore, the work of preparing a conventional tightening member and tightening the same is eliminated, thus improving the workability.

Further, since it is not necessary to tighten the tightening member as in the conventional case, it is not necessary to form a flange on the connecting pipe portion as in the conventional case, and since the connecting pipe portion has a loose taper shape, the mold can be removed. Will be easier. From this fact, the restriction on the shaping of the drainage vertical pipe joint is eliminated, so that it is possible to prepare the drainage vertical pipe joint provided with the connecting pipe portions of various modes, and thereby the drainage vertical pipe joint most suitable for the construction site. Can be selected and used, and by extension, the workability can be further improved.

Further, the inner peripheral side of the connecting pipe portion is formed into a gentle taper shape, and the packing is also formed into a gentle taper shape so as to be in close contact with the inner peripheral side thereof, whereby the packing is prevented from coming out.

[0014]

Embodiments of the present invention will now be described with reference to FIGS. FIG. 1 shows a drainage stack fitting 1 of this example.
(Hereinafter, simply referred to as "pipe joint".)

The pipe joint 1 is integrally cast using a predetermined mold, and a connecting pipe portion 2 for connecting an upper stand pipe 5 is connected to an upper portion of the drawing and a lower stand pipe 8 is connected to a lower portion of the drawing. The connecting pipe portion 7 for Between the upper connecting pipe portion 2 and the lower connecting pipe portion 7, a bulging portion is formed with a diameter larger than those of the connecting pipe portions 2 and 7, and the bulging portion is provided. On the left and right sides of the drawing, connecting pipe portions 3 and 4 for connecting the lateral branch pipes 6 are formed.

The connecting pipe portions 2, 3 and 4 are formed in a gentle taper shape such that the inner and outer diameters of the connecting pipe portions are smaller than those of the base portion side and are smaller than the base side. It is formed in a continuous gentle taper shape without protruding parts such as.

Further, a bottom surface 2a is formed in the inner portion of the vertical pipe connecting pipe portion 2 with a predetermined overhanging width, and this bottom surface 2a is formed.
The inner diameter of the stand tube 5 is formed to be substantially equal to the inner diameter of the stand tube 5, and the insertion side end surface of the stand tube 5 is brought into contact with the bottom surface 2a via the buffer portion 13 of the stand tube packing 10 described below. . On the other hand, a stopper edge 3a is also formed with a predetermined overhanging width in the upper portion of the inner part of the lateral branch pipe connecting pipe portion 3 in the drawing, and when the lateral branch pipe 6 is inserted into the connecting pipe portion 3, the stopper edge 3a is formed. The end surface of the lateral branch pipe 6 on the insertion side is brought into contact with the lateral branch pipe packing 15 via a buffer portion 19 of the packing 15 for the lateral branch pipe. Thus, the bottom surface 2a and the stopper edge 3a
Has a function as a stopper when inserting the vertical pipe 5 or the lateral branch pipe 6.

The connecting pipe portion 4 is formed with a diameter slightly larger than the connecting pipe portion 3 as a whole, except that the connecting pipe portion 3 is formed.
Since it has the same structure as the above, the description thereof is omitted, and the illustration of the lateral branch pipe and the packing connected to the connecting pipe portion 4 is omitted.

Next, the packings 10 and 15 used for connecting the vertical pipe 5 or the lateral branch pipe 6 to the pipe joint 1 manufactured as described above will be described.

First, the vertical pipe 5 is connected to the connecting pipe portion 2 with the packing 10 attached. Details of the packing 10 are shown in FIGS. The packing 10 is made of synthetic rubber and is formed into a substantially cylindrical shape having a certain elasticity, and the upper end in the figure is slightly smaller than the lower end so that the packing 10 can be attached substantially in close contact with the inner peripheral surface of the connecting pipe 2. It is formed in a gentle taper shape. Further, a bellows portion 14 is formed on the peripheral surface of the packing 10, so that the packing 10 can expand and contract in the axial direction.

Tongue-shaped pieces 11 to 11 are formed on the inner peripheral side of the packing 10 from the vicinity of the upper mouth toward the inner part over the entire circumference of the inner peripheral surface and in three stages in the vertical direction. As a result, when the stand pipe 5 is inserted into the packing 10, the tongue-shaped pieces 11 to 11 are elastically pressure-contacted and closely adhered to the peripheral surface of the stand pipe 5, whereby the packing 10 and the stand pipe 5 are connected to each other. The watertightness between them is secured.

A flange 10a is formed on the outer peripheral side of the upper mouth of the packing 10 so as to contact the end face of the mouth of the connecting pipe portion 2. The flange 10a is divided into three equal parts on the circumference. The ear pieces 12 to 12 are formed so as to project on the outer peripheral surface of the connecting tube portion 2. Then, as shown in FIG. 4, when the packing 10 is mounted on the inner peripheral side of the connecting pipe portion 2, the collar edge 10 a is brought into contact with the mouth end surface of the connecting pipe portion 2 and the insertion amount of the packing 10 is increased. Is regulated, that is, the brim 10 functions as an insertion stopper for the packing 10, and the mouth of the connecting pipe portion 2 is set to the ear pieces 12-1.
The packing 10 is prevented from coming off by sandwiching the packing 10 on the inner peripheral side. On the contrary, when the packing 10 is removed when updating the stand pipe, the packing 10 can be easily taken out by gripping the ear-shaped piece 12 and pulling in the pulling direction.

Further, at the lower end of the packing 10,
A cushioning portion 13 which acts as a cushioning material is provided between the connected standpipe 5 and the connecting pipe portion 2. This buffer 13
Is formed so as to extend from the lower end of the packing 10 to the inner peripheral side with a predetermined width over the entire circumference so that when the stand pipe 5 is inserted, the end surface of the stand pipe 5 contacts the upper surface of the buffer portion 13. Is formed in. Then, as shown in the figure, the cross-sectional shape of the buffer portion 13 is formed by being folded back into a substantially U-shape, whereby the expansion and contraction of the stand pipe 5 is absorbed, and the stand pipe 5 and the bottom surface 2a of the connection pipe portion 2 are constantly formed. The watertightness of the pipe joint 1 is maintained and the troubles such as the damage of the pipe joint 1 or the generation of abnormal noise due to the direct contact of the vertical pipe 5 with the bottom surface 2a of the connecting pipe portion 2 are prevented.

The packing 10 is formed as described above, and after the packing 10 is attached to the inner peripheral side of the connecting pipe portion 2, the stand pipe 5 is inserted into the inner peripheral side of the packing 10 to make the stand 10 upright. The pipe 5 is connected to the connecting pipe portion 2 in a watertight manner.

Next, the lateral branch pipe 6 is connected to the connecting pipe portion 3 with the packing 15 attached. The stopper edge 3a of the connecting pipe portion 3 is formed only above the connecting pipe portion 3 in the drawing so that drainage smoothly flows into the pipe joint 1 from the lateral branch pipe 6.

The packing 15 for the lateral branch pipe is also formed in a substantially cylindrical shape having a certain elasticity by using synthetic rubber as a material, substantially like the packing 10 for the stand pipe, and along the inner peripheral surface of the connecting pipe portion 3. The left end in the figure is formed in a slightly tapered shape with a diameter slightly smaller than the right end so that it can be mounted in close contact. The packing 15 can be expanded and contracted in the axial direction by the bellows portion 16.

Further, the packing 15 for the lateral branch pipe includes
Tongue-like pieces 17 to 17, brim 15a and ear pieces 18 to 18
However, it is formed in substantially the same manner as the packing 10 for the stand pipe. That is, the tongue-shaped piece 17 is elastically pressed against the entire circumference of the lateral branch pipe 6 to ensure watertightness between the packing 15 and the lateral branch pipe 6, and the flange 15a is connected to the connecting pipe portion 3
It functions as an insertion stopper by abutting on the mouth end surface of the, and by this, the insertion amount of this packing 15 is regulated,
The ear-shaped piece 18 sandwiches the mouth of the connecting tube portion 3 and is elastically pressed against the outer peripheral surface of the mouth, thereby preventing the packing 15 from falling off. Further, when the packing 15 is removed when the lateral branch pipe is renewed, the ear-shaped piece 18 is grasped and pulled in the pulling-out direction.
5 is also similar to the packing 10 for the stand pipe in that it can be easily taken out. .

Next, the buffer portion 19 of the packing 15 is
As shown in FIG. 7, it is formed so as to extend in a substantially crescent shape (see FIG. 6) from the peripheral edge of the right end portion in the drawing toward the inner peripheral side. Side branch pipe 6
Is inserted until the buffer portion 19 is sandwiched between the stopper edge 3a of the connection pipe portion 3 and the insertion side end of the lateral branch pipe 6 does not directly contact the stopper edge 3a. There is. As a result, the lateral branch pipe 6 is connected in a state where watertightness is ensured without causing any trouble such as breakage of the pipe joint 1 or generation of abnormal noise due to expansion and contraction of the lateral branch pipe 6.

Further, as shown in FIG. 6, the ear piece 18 described above is used.
One of the earpieces 18 to 18 (hereinafter referred to as “reference earpiece”) is formed so as to be aligned with the buffer portion 19 in the circumferential direction, and the center of the tip of the reference earpiece 18 is formed. The mark 18a is formed by cutting. On the other hand, the connecting pipe part 3
On the side, a reference line 3b is formed along the ridgeline of the peripheral surface. As a result, when the packing 15 is mounted, the circumferential position of the packing 15 is adjusted so that the mark 18a on the packing 15 side matches the reference line 3b on the connection tube portion 3 side, and then the packing 15 is cushioned. The portion 19 is located on the upper portion of the connecting pipe portion 3 and can be easily mounted at a position substantially aligned with the stopper edge 3a. In this way, the buffer unit 1
By installing the packing 15 in a state in which 9 is substantially aligned with the stopper edge 3a of the connecting pipe portion 3, drainage is performed by the lateral branch pipe 6
It is designed to smoothly flow into the pipe fitting 1.

Further, as shown in FIG. 8, when inserting the lateral branch pipe 6 into the packing 15, the insertion side front end portion is temporarily placed on the mouth of the lateral branch pipe packing 15 (lower left end in the drawing). A macula 20 for storing is formed.
The macula portion 20 is formed between the two ear pieces 18 and 18 other than the reference ear piece 18 on the inner peripheral side of the mouth, and has an arc shape along the inner peripheral side of the mouth. In addition, it is formed to have a drainage gradient. According to this macula portion 20, since the lateral branch pipe 6 can be inserted into the packing 15 from a state in which the insertion-side tip end is placed on the macula portion 20, the connecting work of the lateral branch pipe 6 is facilitated. Further, the workability is improved, and the lower part of the mouth of the packing 15 is reinforced by forming the macula portion 20, so that the water leakage due to the hanging down of the lateral branch pipe 6 after the construction can be prevented. In addition, this macula section 20
In addition to forming the buildup on the inner peripheral side of the mouth as described above,
The lower arc portion of the brim 15a may be formed to have a proper thickness on the lateral branch pipe side (left side in the drawing) and the outer peripheral side (lower side in the drawing).

The lateral branch pipe packing 15 is formed as described above. After the packing 15 is adjusted in its circumferential position, it is tightly attached to the inner peripheral side of the connecting pipe portion 3 and then the lateral branch pipe 6 is formed. Is inserted into the inner peripheral side of the packing 15, and the connecting pipe portion 3
It is connected in a state where watertightness between is secured.

A packing (not shown) formed in the same manner as described above is also attached to the connection pipe portion 4 in an intimate contact with the inner peripheral side thereof, and is connected to the side opposite to the side branch pipe 6. A horizontal branch pipe (not shown) is connected.

This example is constructed as described above,
With this configuration, the following functions and effects are achieved. That is, the pipe joint 1 of the present example is provided with an upper connecting pipe portion 2 for connecting a vertical pipe and connecting pipe portions 3 and 4 for connecting left and right lateral branch pipes, and each connecting pipe portion 2, 3 and 4 is internally connected. The vertical pipe 5 or the lateral branch pipe 6 is connected in a watertight manner via substantially cylindrical packings 10 and 15 having tongue-shaped pieces 11 to 11 and 17 to 17 on the circumferential surface.

Therefore, it is not necessary to press the packing between the vertical pipe or the lateral branch pipe and the connecting pipe portion to secure the watertightness as in the conventional case, and the tightening flange 33 or the cap nut 35 can be tightened. No parts required. Therefore, these tightening operations are eliminated, the connecting operation to the pipe joint 1 is greatly simplified, and the workability thereof is improved.

The packings 10 and 15 have bellows parts 1
Since the packings 4 and 16 and the buffers 13 and 19 are provided, the packings 10 and 15 can be expanded and contracted in the axial direction thereof. Therefore, the packing tubes 10 and 15 can be expanded and contracted in the axial direction of the vertical pipe 5 and the lateral branch pipes 6 due to changes in temperature and the like. Expansion and contraction is absorbed, and a proper watertight state can be maintained at all times, and at the same time, the buffer portions 13, 1
9 is located between the end faces of the vertical pipes 5 and the lateral branch pipes 6 and the bottom faces 2a, 3a of the connecting pipe portions 2, 3 and acts as a cushioning member between them, so that they directly contact each other. The generation of sound can be prevented, and further, the vertical pipe 5 or the lateral branch pipe 6 extends and is pressed against the bottom surfaces 2a and 3a of the connecting pipe portions 2 and 3 to prevent damage such as cracks in the pipe joint 1. Can be prevented.

Further, ear-shaped pieces 12 to 12 and 18 to 18 are provided at the mouths of the packings 10 and 15, respectively, and the connection pipes 2 and 3 are connected to each other when the packings 10 and 15 are mounted. Since the mouths of the pipe portions 2 and 3 are sandwiched by the inner peripheral sides of the ear-shaped pieces 12 and 18, the packing 10 and the horizontal branch pipe 6 are inserted into the connecting pipe portions 2 and 3 respectively. The reference numeral 15 is always held at an appropriate position without being pushed into the inner portions of the connecting pipe portions 2 and 3. Since the inner surface of the connecting pipe portion 3 and the packings 10 and 15 are formed in a gentle taper shape, after they are once mounted,
While preventing the packing 10 or 15 from falling off,
The packings 10 and 15 can be easily removed from the connecting tube portions 2 and 3 by gripping the ear-shaped pieces 12 and 18 and pulling in the pulling direction.

Further, according to the packings 10 and 15 described above, it is not necessary to mount the conventional tightening members such as the tightening flange 33 and the cap nut 35, and therefore, the brim edges are formed on the outer circumferences of the tips of the connecting pipe portions 2 and 3. It is not necessary to project 38 and 39. As described above, since the protruding portion which is formed overhanging on the outer periphery of the conventional connecting pipe portion is eliminated, and the connecting pipe portions 2 and 3 are formed in a gentle taper shape in which the tip portion has a small diameter, It is not necessary to perform casting using the combination core 40 as shown in FIG. 13 even in the case of a pipe joint having a complicated arrangement of connecting pipe portions.

That is, since a pipe joint having a complicated shape as shown in FIG. 10 or FIG. 11 can be easily cast without increasing the cost, the variation of the pipe joint is widened, and the workability by the pipe joint is greatly increased. Can be improved.

Here, in the case of the so-called rifle type pipe joint 28 shown in FIG. 10, it is not necessary to provide the projecting portions on the connecting pipe portions 28a, 28a for the lateral branch pipes and to tighten the tightening member. The connecting pipe portions 28a, 28a can be arranged at the minimum pitch, and the pipe joint 28 can be designed more compact to save the piping space. In addition, in the pipe joint 29 shown in FIG. 11, the lateral branch pipes from the left and right and the front-rear direction can be connected with minimum routing, and space saving and workability can be improved.

As described above, the packing 1 of this example
By using 0 and 15, the conventional tightening member and its tightening work are eliminated, so the workability is greatly improved.
Moreover, the shapes of the connecting pipe portions 2 and 3 are the same as those of the conventional protruding portions
Since it is possible to form a loose taper shape in which a protruding portion to the outer peripheral side such as 9 is eliminated, it is not necessary to use the combination core 40 in the casting process of the pipe joint, and therefore, the production cost of the pipe joint is not increased. Therefore, it is possible to prepare a pipe joint including various types of connection pipe portions, and thus improve the workability of the pipe joint.

The bellows portion 14 or 16 provided on the peripheral surface of the packing 10 or 15 is a vertical pipe 5 or a lateral branch pipe 6.
When the expansion / contraction amount of is small, it may be omitted.

Next, FIGS. 12 to 14 show another embodiment of the packing 25 for a lateral branch pipe. The packing 25 is a packing 25 for a different-diameter pipe that enables connection of a lateral branch pipe 6 ′ having a smaller diameter than the lateral branch pipe 6 described above without changing the connecting pipe portion 3, that is, the pipe joint 1. An outer peripheral portion 26 which is closely attached to the inner peripheral side of the inner peripheral portion of the lateral branch pipe 6 and an inner peripheral portion 27 which is eccentrically provided on the inner peripheral side of the outer peripheral portion 26 and is closely attached to the outer peripheral side of the lateral branch pipe 6 ′. Shielding part 25 that shields the space in a watertight manner
and a.

The outer peripheral portion 26 is formed in a gentle taper-like substantially cylindrical shape that can be closely attached to the inner peripheral side of the connecting pipe portion 3, and the brim edge 26c and the ear-shaped piece 26a are substantially similar to the packing 15 described above.
26a and a bellows portion 26b are provided. on the other hand,
As with the packing 15, the tongue-shaped piece 27a,
Stopper edge 27b, bellows portion 27c, and pillow portion 27d
Is provided. The stopper edge 27b substitutes the function of the stopper edge 3a of the horizontal branch pipe connecting pipe portion 3 as a stopper, and the insertion side end surface of the horizontal branch pipe 6'abuts on the stopper edge 27b, so that the horizontal branch pipe 6'is also abutted. The insertion amount of is regulated. Shield 2
5a projects to the inner peripheral side of the outer peripheral portion 26 (the outer peripheral side of the inner peripheral portion 27) to shield the both in a watertight manner.

Packing 2 for different diameter pipes formed in this way
According to 5, it is possible to connect a lateral branch pipe 6'having a smaller diameter than the lateral branch pipe 6 in a state in which the various functions of the packing 15 are provided as they are, so that the packing 15 can be replaced without changing the pipe joint 1. The lateral branch pipe 6'having a smaller diameter can be connected only by exchanging the packing 25 for the different diameter pipe. Then, by arranging packings for different-diameter pipes in which the inner peripheral portion 27 is matched with the lateral branch pipes of various diameters, it is possible to connect the lateral branch pipes of various diameters using the pipe joint as a common component. Can be further improved.

Here, in the packing 25 for different diameter pipes,
As shown in FIG. 15, a reinforcing tool 30 for preventing the shape of the packing 25 for different diameter pipes from being deformed may be attached. The reinforcing tool 30 is formed by integral molding of synthetic resin, and as shown in FIG. 16 or 17, an outer cylindrical portion 30 a fitted on the inner peripheral side of the outer peripheral portion 26 and an outer peripheral side of the inner peripheral portion 27. And an inner cylindrical portion 30b fitted in the. The inner tubular portion 30b is integrally formed so as to be inscribed on the inner peripheral side of the outer tubular portion 30a, and an opening 30c is cut out at the joint between the two tubular portions 30a and 30b.

Further, a stopper edge 30d is provided in an overhanging shape on the upper portion of the inner cylindrical portion 30b. This stopper edge 3
0d is the same as the stopper edge 27b of the inner peripheral portion 27 of the packing 25 for different diameter pipes described above, and the stopper edge 3a.
Of the lateral branch pipe 6 is abutted against the stopper edge 30d, so that the amount of insertion of the lateral branch pipe 6 is regulated. . Therefore, when the reinforcing tool 30 is attached, the stopper edge 27b of the inner peripheral portion 27 is unnecessary.

The reinforcing tool 30 thus formed is inserted from the opening side of the outer peripheral portion 26 with the joint portion between the outer peripheral portion 26 and the inner peripheral portion 27 being inserted into the opening portion 30c of the outer cylindrical portion. The outer peripheral portion 26 is mounted by 30a, and the inner peripheral portion 27 is mounted by the inner cylindrical portion 30b. In this manner, the packing 25 for different diameter pipes is attached to the connecting pipe portion 3 with the reinforcing tool 30 attached. And
The reinforcing member 30 reinforces the outer peripheral portion 26 and the inner peripheral portion 27 of the packing 25 to prevent the shape of the packing from being deformed, thereby further improving the sealing property of the packing 25 for different diameter pipes.

Next, FIG. 18 exemplifies the packing 40 for different diameter pipes which can be mounted in the state where the above-mentioned packing 15 for lateral branch pipes is still mounted on the connecting pipe portion 3. In this case, the packing 40 for different diameter pipes is provided with a seal edge 40c along the peripheral edge on the right side of the outer peripheral portion 40a in the figure. The seal edges 40c and the tongue-shaped pieces 17 to 17 of the packing 15 for the lateral branch pipes are provided.
By this, the sealing property (watertightness) between the packing 40 for different diameter pipes and the packing 15 for lateral branch pipes is secured. The seal edge 40c is the packing 40 for the different diameter pipe.
Has a function as a stopper so as not to be inserted into the connecting pipe portion 3 more than necessary. On the other hand, the sealing property between the packing 40 for the different diameter pipe and the lateral branch pipe 6 is ensured by the inner peripheral portion 40b of the packing 40 for the different diameter pipe being closely attached to the lateral branch pipe 6. Further, in this case, the packing 40 for the different diameter pipe is also equipped with the same reinforcement tool 41 as described above to prevent its shape from being lost. It should be noted that the packing 40 for different diameter tubes includes the ear-shaped pieces 26a to 26a and the tongue-shaped piece 2.
7a (see FIG. 12) is unnecessary.

Next, FIG. 19 shows the connecting pipe portion 3 to which the blind cover 50 is attached, and FIG. 20 shows the blind cover 50. The blind cover 50 is provided with the horizontal branch pipe connecting pipe portion 3 (or the vertical pipe connecting pipe portion 2, the same applies hereinafter) when the horizontal branch pipe 6 (or the vertical pipe 5, the same applies below) is not connected. It is attached to the opening, and a brim edge 50b is formed which is brought into contact with the end face of the mouth of the connecting pipe portion 3, and the mouth of the same connecting pipe portion 3 is formed at the circumferential trisecting position of the brim edge 50b. Ear-shaped pieces 50a to 50 that can be sandwiched between the peripheral surface of the blind cover 50
a is provided in a protruding shape.

By attaching the blind cover 50 formed in this way, the connecting pipe portion 3 can be shielded and the sealing performance of the drainage vertical pipe joint 1 can be secured, so that the lateral branch pipe 6 is connected. Even if the pipe joint 1 is not used, the pipe joint 1 can be diverted and the workability can be improved or the cost can be reduced. Further, since the blind cover 50 can be easily attached and detached, the inside of the pipe joint 1 and the inside of the vertical branch pipe 5 or the lateral branch pipe 6 can be easily washed, and the maintainability in the pipe is improved.

[0051]

Since the present invention has the above-mentioned structure, the conventional tightening member and its tightening work are not required, so that the workability when connecting the stand pipe or the lateral branch pipe is improved.

Further, since the conventional overhanging portion in the connecting pipe portion can be eliminated and the connecting pipe portion can be made into a gentle taper shape, it is not necessary to use the combination core in the casting process of the drainage vertical pipe joint, and the drainage can be eliminated. It is possible to prepare various variations of the drainage vertical pipe joint without increasing the manufacturing cost of the vertical pipe joint, and by selecting the drainage vertical pipe joint with the optimal connection pipe part for the construction site, The workability of the pipe joint can be further improved.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of a drainage vertical pipe joint to which a vertical pipe and a lateral branch pipe are connected according to an embodiment of the present invention.

FIG. 2 is a partial vertical cross-sectional view of a packing for a vertical pipe.

FIG. 3 is a view taken in the direction of arrow C in FIG. 2, and is a plan view of the packing for the stand pipe.

FIG. 4 is a detailed view of a vertical pipe connecting portion.

FIG. 5 is an overall view of a packing for a lateral branch pipe.

FIG. 6 is a view taken in the direction of arrow D in FIG. 5, and is a bottom view of the lateral branch pipe packing.

FIG. 7 is a detailed view of a lateral branch pipe connection portion.

8 is a cross-sectional view taken along the line EE of FIG. 6 and is an operation explanatory view of the macula portion.

FIG. 9 is a sectional view taken along line GG of FIG. 6;

FIG. 10 is an overall perspective view of another embodiment of a drainage stack pipe joint.

FIG. 11 is an overall perspective view of a drainage stack pipe joint of another embodiment of the present invention.

FIG. 12 is a vertical cross-sectional view of a connecting pipe portion in which a lateral branch pipe having a different diameter is connected using a packing for a different diameter pipe.

13 is a view taken in the direction of arrow H in FIG. 12, and is a plan view of the packing for a different diameter pipe.

FIG. 14 is a view taken in the direction of arrow I in FIG. 12, and is a bottom view of the packing for a different diameter pipe.

FIG. 15 is a vertical cross-sectional view of a connecting pipe portion in a state in which a lateral branch pipe having a different diameter is connected using a packing for a different diameter pipe to which a reinforcing tool is attached.

FIG. 16 is a front view of the reinforcing tool.

17 is a cross-sectional view taken along the line JJ of FIG. 16, which is a vertical cross-sectional view of the reinforcing tool.

FIG. 18 is a vertical cross-sectional view of a connecting pipe portion in a state in which a lateral branch pipe having a different diameter is connected by using a packing for a different diameter pipe to which a reinforcing tool of another aspect is attached.

FIG. 19 is a vertical cross-sectional view of the connecting pipe portion with a blind cover attached.

FIG. 20 is a side view of the blind cover.

FIG. 21 is a vertical sectional view of a conventional drainage vertical pipe joint.

FIG. 22 is a schematic explanatory diagram of a casting process performed by using a combination core in a conventional drainage vertical pipe joint.

[Explanation of symbols]

1, 28, 29, 60 ... Drainage vertical pipe joint 2, 60a ... Vertical pipe connecting pipe part, 2a ... Bottom face 3, 4, 60b ... Horizontal branch pipe connecting pipe part, 3a ... Stopper edge,
3b ... Reference line 5,61 ... Stand pipe, 6, 6 ', 62 ... Side branch pipe 10 ... Stand pipe packing, 15 ... Side branch packing 11,17 ... Tongue-shaped piece, 12, 18 ... Ear-shaped piece 13, 19 ... Buffer part, 14, 16 ... Bellows part 20 ... Macula part 25, 40 ... Packing for different diameter pipe (packing for lateral branch pipe) 26 ... Outer peripheral part, 27 ... Inner peripheral part 50 ... Blind cover 63 ... Tightening flange, 64 , 67 ... Packing, 65 ...
Cap nut 70 ... Combination core

Claims (5)

(57) [Claims] 1. A drainage vertical pipe joint comprising a vertical pipe connecting pipe portion for connecting a vertical pipe and a horizontal branch pipe connecting pipe portion for connecting a horizontal branch pipe, wherein both of the connecting pipe portions are provided. At least the lateral branch pipe connection pipe portion is formed in a gentle taper shape in which the inside diameter and the outside diameter are smaller on the mouth side than on the base side, and the stand pipe or the side branch pipe can be closely attached to the inner peripheral surface of the connection pipe portion. A drainage vertical pipe joint characterized in that it is water-tightly connected to each connecting pipe portion via a packing having a loosely tapered cylindrical shape. 2. The packing is provided so as to extend along the outer periphery of the mouth side of the connection pipe portion and is provided at a suitable interval with the brim edge that abuts the end face of the mouth of the connection pipe portion. An ear-shaped piece that can overhang the outer peripheral surface of the connecting pipe portion and sandwich the mouth of the connecting pipe portion with the peripheral surface of the packing; and the stand pipe or the lateral branch pipe that is formed to extend to the inner peripheral side. Between the end face of the vertical pipe or the lateral branch pipe and the bottom face of the connecting pipe part, and the tongue-shaped piece that is in close contact with the entire circumference of the The drainage vertical pipe joint according to claim 1, further comprising a buffer portion interposed in the drainage vertical pipe joint. 3. The drainage stack pipe joint according to claim 1, wherein a bellows portion is provided on a peripheral surface of the packing, and the bellows portion is expandable / contractible in an axial direction thereof. 4. A packing for a lateral branch pipe is formed with a thick lower wall at the base of the mouth, and a macula portion for mounting an end portion of the lateral branch pipe on the insertion side is inserted when the lateral branch pipe is inserted. 4. The drainage stack pipe joint according to claim 1. 5. The lateral branch pipe connecting pipe portion has a substantially cylindrical outer peripheral portion which is in close contact with the inner peripheral side of the connecting pipe portion, and an outer periphery of the lateral branch pipe which is arranged on the inner peripheral side of the outer peripheral portion. The lateral branch pipes are connected via a packing for pipes of different diameters, each of which has a substantially cylindrical inner peripheral portion in close contact with the side and a shielding portion that watertightly shields between the inner peripheral portion and the outer peripheral portion. The drainage stack pipe joint according to any one of claims 1 to 4, wherein