JP4124843B2 - Drainage collecting pipe joint and disappearance model for producing the pipe joint - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention is a pipe joint used for a drainage path in a medium-high-rise building such as an apartment, for example, and a drainage collecting pipe joint (for example, connecting a horizontal branch pipe for toilet drainage or miscellaneous drainage to a drainage standpipe ( Hereinafter, the present invention also relates to a disappearance model for manufacturing the pipe joint.
[0002]
[Prior art]
In general, this type of pipe joint allows multiple toilet drainage and miscellaneous drainage (drainage from kitchens, bathtubs, etc.) to drain into a single drainage stack on each floor. It has a side branch pipe receptacle. For this reason, for example, as shown in FIG. 7, when a large amount of toilet drainage H flows in through one receiving port 50 out of two receiving ports 50 and 51 that are arranged at positions orthogonal to each other as seen in a plan view, The toilet drainage H collides with the inner wall of the pipe in the forward direction of the inflow and branches to the left and right. The branched toilet drainage h has a problem of flowing backward to the miscellaneous drain receiving port 51 which is the other receiving port. .
[0003]
[Problems to be solved by the invention]
However, no attempt has been made yet to actively solve this backflow problem. In particular, in recent years, this type of pipe joint has been made more compact (reducing the diameter of the body part where the side pipe receiving port is disposed), and this backflow problem has been closed up as a problem to be solved. Has been. Therefore, the present invention provides a drainage collecting pipe that can more reliably prevent the drainage flowing from the side branch pipe (mainly toilet drainage) from flowing back to the other side branch pipe outlet (mainly the drainage outlet for miscellaneous drainage). It is an object of the present invention to provide a vanishing model for use in manufacturing a joint and the pipe joint by the vanishing model casting method.
[0004]
[Means for Solving the Problems]
For this reason, this invention was set as the drainage collecting pipe joint or the disappearance model of the structure described in each said claim.
According to the drainage collecting pipe joint of claim 1, when the drainage flowing in from another receptacle collides with the opposing pipe inner wall, branches to the left and right, and reaches the opening of the receptacle through the pipe inner wall as it is. Since the backflow prevention wall is formed so as to protrude toward the inside of the pipe at the opening of the receiving port, the waste water transmitted through the inner wall of the pipe is blocked by the backflow prevention wall and does not flow back into the receiving port.
The backflow prevention wall may be formed along the entire circumference of the opening of the receiving port, or may be formed only on the side where the drainage traveling along the inner wall of the pipe reaches. If a backflow prevention wall is provided only in the necessary range (the side where the drainage that travels through the pipe wall reaches), the overhanging portion will be reduced, causing problems such as accumulation of solid matter on the backflow prevention wall. There is no.
The backflow prevention wall may be integrally formed at the pipe joint manufacturing stage, or the backflow prevention wall manufactured separately may be retrofitted to a predetermined position by means such as adhesion. Therefore, the backflow prevention wall may be made of a material different from that of the pipe joint body (for example, made of resin).
[0005]
Further , according to the drainage collecting pipe joint of claim 2, it is possible to prevent the toilet drainage flowing into the pipe joint from flowing backward to the receiving port for miscellaneous drainage. That is, a large amount of toilet drainage that flows into the pipe joint through the side branch pipe and the receiving port collides with the opposite inner wall surface of the pipe and branches to the left and right, and then travels along the inner wall surface of the pipe to the receiving side for miscellaneous drainage. It reaches. Conventionally, the toilet waste water after the branching flowed back to the receiving port for miscellaneous waste water. However, according to the second aspect of the present invention, since the backflow prevention wall is formed so as to protrude toward the inside of the pipe at the opening of the miscellaneous drainage receptacle, the toilet drainage that travels on the inner wall surface of the pipe after branching is prevented from this backflow. It is blocked by the wall and does not flow backward to the drainage for miscellaneous drainage.
For reasons of construction, the toilet drainage receptacle in this type of pipe joint is usually displaced above the miscellaneous drainage receptacle. In addition, toilet drainage is often flushed at a time. For this reason, toilet drainage flows into the pipe joint, then vigorously collides with the opposing pipe inner wall surface, branches right and left after the collision, and flows down (divides) sideways along the pipe inner wall surface. Usually, a receptacle for miscellaneous drainage is arranged at a position orthogonal to the receptacle for drainage of a toilet. For this reason, in the conventional case, the branched toilet drainage may flow backward to the side and then backflow (inflow) to the miscellaneous drainage outlet. However, since a backflow prevention wall is formed overhanging the opening of the miscellaneous drainage receptacle, it is reliably prevented that the toilet drainage separated by the backflow prevention wall flows back to the miscellaneous drainage receptacle. .
[0006]
In addition, according to the drainage collecting pipe joint according to claim 1 or 2, it is sufficient to provide a backflow prevention wall within a minimum necessary range in order to prevent backflow of the separated drainage (toilet drainage). It is not necessary to form a backflow prevention wall along the entire circumference of the opening. If there are many overhanging parts inside the pipe, there arises a problem that solids and the like contained in the drainage flowing down easily accumulate. Therefore, it is desirable to form a backflow prevention wall in the minimum necessary range. The range in which the backflow prevention wall is formed to be extended means a range in the direction along the opening of the receiving opening and a range for the extension size inward of the pipe.
[0007]
According to the drainage collecting pipe joint of the third aspect , the backflow prevention wall can prevent backflow of the separated toilet drainage by the portion along the side of the opening, and by the portion along the top of the opening. Backflow of the vertical pipe drainage can also be prevented.
[0008]
According to the drainage collecting pipe joint of the fourth aspect , backflow from all directions can be prevented.
[0009]
Similar effects can be obtained by the drainage collecting pipe joint according to claim 5 . The present invention can be applied not only to a pipe joint integrated with a receptacle but also to a pipe joint with a separate receptacle. In this case, the backflow prevention wall may be provided on the receptacle side as described above or on the pipe joint main body side.
[0010]
According to the vanishing model of the sixth aspect , when the pipe joint is manufactured by the vanishing model casting method, the backflow prevention wall having the above-described effects can be easily formed at a predetermined position. If the wall portion for the backflow prevention wall is formed at the stage of the disappearance model, an arbitrary backflow prevention wall can be easily provided with respect to the extent of overhang formation or the overhang dimension.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, various embodiments of the present invention will be described with reference to FIGS. 1 and 2 show the drainage collecting pipe joint 1 of the first embodiment. The pipe joint 1 includes an upper receiving port 2 for connecting an upstream side stand 2a and a lower connecting port 3 inserted and connected to a receiving port of a downstream side stand 3a. A slightly large-diameter trunk 4 is formed below the upper receptacle 2, a toilet drainage receptacle 5 for connecting a side branch pipe D for toilet flushing to the trunk 4, and miscellaneous drainage A drainage receiving port 6 for connecting the horizontal branch pipe Z is provided. The toilet drainage receiving port 5 and the miscellaneous drainage receiving port 6 are arranged so as to be orthogonal to each other. Further, the toilet drainage receiving port 5 is located on the upper side of the trunk portion 4, the miscellaneous drainage receiving port 6 is located on the lower side, and the both receiving ports 5 and 6 are arranged so as to be shifted vertically.
A tapered tube portion 7 that gradually decreases in diameter downward is formed on the lower side of the body portion 4, and the lower connection port 3 is provided on the lower side of the tapered tube portion 7. A speed reduction guide 8 is formed on the inner wall surface from the lower end portion of the body portion 4 to the taper tube portion 7, and a ventilation adjustment guide 9 is formed on the inner wall surface of the taper tube portion 7 so as to protrude inward. It has the function of swiveling along the inner wall surface of the pipe while receiving and decelerating the drainage. This allows the central part of the pipe to communicate with the atmosphere (air core) to reduce pressure fluctuations in the pipe. The basic configuration of the drainage collecting pipe joint 1 is not particularly required to be changed.
In the figure, C indicates a concrete slab, and the pipe joint 1 is fixed in a state of passing through the concrete slab C.
[0012]
As shown in the drawing, a backflow prevention wall 10 is formed in the opening 6a on the pipe joint inner wall side of the miscellaneous drain receiving port 6. The backflow prevention wall 10 is formed so as to project inward of the pipe along the opening 6a. In addition, as shown in the drawing, the opening 6a is formed in a range extending from the upper part to slightly lower than ¼ circumference along the side part of the point where the toilet drainage H collides with the inner wall surface of the pipe. The extension dimension of the backflow prevention wall 10 toward the inside of the pipe is set to a necessary and sufficient dimension for blocking drainage that travels along the pipe inner wall as shown in FIG. This overhang dimension is desirably as small as possible and avoids corners in order to avoid accumulation of solid matter contained in the toilet drainage flowing down. Specifically, it is desirable to form the protrusion so as to be raised to a substantially semicircular cross section.
[0013]
According to the drainage collecting pipe joint 1 provided with such a backflow prevention wall 10, a large amount of the toilet drainage H flowing in from the receiving port 5 through the side branch pipe D for toilet flushing is as shown in FIG. Then, it collides with the inner wall surface of the pipe facing the receiving port 5 and then branches left and right. One of the branched toilet drainage h wraps around the opening 6a side of the receiving port 6 along the inner wall of the pipe. However, since the backflow prevention wall 10 is formed overhanging in the opening 6a, the flow of the toilet drainage h is blocked by the backflow prevention wall 10, and thus flows downward without flowing back into the receiving port 6. .
Thus, the backflow prevention wall 10 can be reliably prevented by simply projecting the backflow prevention wall 10 at a predetermined position, and a large cost increase can be achieved for the downsizing of the pipe joint in recent years. It can respond enough without inviting.
[0014]
Next, as shown in FIG. 4, various changes can be added to the range in which the backflow prevention wall 10 is provided. For example, in the said embodiment, when forming in the range from the upper part of the opening part 6a of the miscellaneous drain receptacle 6 to the side of the toilet drainage collision point side from the upper part to a little lower than 1/4 circle (FIG. 4 ( A), hereinafter referred to as “1/4 round type”), but as shown in FIG. 4B, not only the side of the toilet drainage collision point side but also the opposite side is symmetrical (reverse) It is good also as a structure (henceforth "reverse U character type") formed in a U character type. According to the reverse U-shaped backflow prevention wall 11, since the overhang is formed along the upper portion of the opening 6 a, not only can the backflow of the toilet drainage H be prevented as illustrated above, but also the vertical pipe It is possible to prevent the backflow of drainage.
Further, as shown in FIG. 4C, the backflow prevention wall 12 may be formed overhanging the entire circumference of the opening 6a. According to this all-around backflow prevention wall 12, it is possible to prevent the backflow of drainage flowing down or scattered from all directions.
[0015]
Next, FIG. 5 shows a vanishing model 20 used when the drainage collecting pipe joint 1 is manufactured by the vanishing model casting method. FIG. 6 (A) shows the disappearance model 20 of the entire pipe joint, and FIG. 5 (B) shows the disappearance model 21 for manufacturing the receptacle portion for miscellaneous drainage. The vanishing port model 21 is fixed to a predetermined position of the pipe joint main body by bonding. This point does not require any change. Further, since the disappearance model casting method and the material of the disappearance model are not particularly required to be changed, the description thereof is omitted.
Now, as shown in the figure, a flange portion 21c for attachment is formed at the end portion on the inner side of the pipe joint of the vanishing model 21 for casting a miscellaneous drain receiving port, and on the inner peripheral side of the flange portion 21c, It is an opening 21a for forming an opening on the inner side of the pipe joint of the receiving port. A wall portion 21b for casting the reverse U-shaped backflow prevention wall 11 (see FIG. 4B) is also formed in an inverted U shape along the opening 21a. The shape such as the overhang dimension needs to be set appropriately in accordance with the intended backflow prevention wall.
Thus, when manufacturing a pipe joint by a vanishing model casting method, the said backflow prevention wall 11 can be obtained easily by forming the suitable wall part 21b in the step of a vanishing model. By forming the wall portion 21b on one side or the entire circumference of the opening portion 21a, the 1 / 4-circumference type backflow prevention wall 10 (see FIG. 4A) or the all-around type backflow prevention wall 12 ( 4C) can be easily obtained.
[0016]
Next, the backflow prevention walls 10 to 12 exemplified above are exemplified when applied to the receiving port 6 formed integrally with the pipe joint body. However, the backflow prevention wall according to the present invention is separate from the pipe joint body. The same can be applied to the receptacle manufactured in (1). This separate receptacle 30 is illustrated in FIG. This receptacle 30 is also for connecting a horizontal branch pipe Z for miscellaneous drainage, and is set on the inner peripheral side of the mounting seat portion 31a of the pipe joint main body 31, and is piped using a fixing flange 32 and fixing bolts 33-33. It is fixed to the joint body 31. A cylindrical packing 35 is attached to the inner peripheral side of the receptacle 30, and the receptacle 30 is fixed at a predetermined position by pressing the outer end face (right end face in the drawing) with the fixing flange 32. The side branch pipe Z is fixed so as not to come off. Further, a packing 36 is also interposed between the receiving port 30 and the mounting seat 31a of the pipe joint body 31 to ensure water tightness between the two.
A backflow prevention wall 30b similar to the above is formed along the opening 30a on the inner side of the pipe joint of the separate receiving port 30 attached in this way. As shown in FIG. 6C, the backflow prevention wall 30b is formed in an inverted U shape along the opening 30a. However, in the case of this separate receptacle type, it may be formed only on one side where the toilet drainage collides as necessary, or may be formed along the entire circumference of the opening 30a.
[0017]
Each embodiment described above can be further modified. For example, although the drainage collecting pipe joint 1 in which the side branch pipe D for toilet drainage and the side branch pipe Z for miscellaneous drainage are connected one by one is illustrated, the side branch pipe D for toilet drainage or miscellaneous drainage is illustrated. , Z can be similarly applied to a drainage collecting pipe joint in which two or more Z are connected.
Moreover, although the structure which provides the backflow prevention wall 10 (or 11, 12) only in the receptacle 6 for miscellaneous drainage was illustrated, even if the same backflow prevention wall is provided also in the toilet 5 drainage receptacle 5, if necessary. Good.
Furthermore, although a so-called integrated drainage collecting pipe joint has been illustrated, the present invention can be similarly applied to a so-called two-body drainage collecting pipe joint that is divided into two. In this two-body type pipe joint, even if the upper joint is provided with a toilet drainage receptacle and the lower joint is provided with a miscellaneous drainage receptacle, both receptacles are connected in a positional relationship that is orthogonal to each other. If this is the case, the same problem may occur. Therefore, by providing the above-described backflow prevention wall 10 (or 11, 12), it is possible to prevent the backflow of the toilet drainage to the miscellaneous drainage receptacle.
[Brief description of the drawings]
FIG. 1 is a diagram showing an embodiment of the present invention, and is an overall perspective view of a drainage collecting pipe joint. In this figure, the inside of the pipe joint is shown through, and the flow of drainage is shown by an arrow.
FIG. 2 is a longitudinal sectional view of a drainage collecting pipe joint. Also in this figure, the flow of waste water is indicated by arrows.
FIG. 3 is a cross-sectional view of a drainage collecting pipe joint. Also in this figure, the flow of waste water is indicated by arrows.
FIG. 4 is a diagram showing a range in which a backflow prevention wall is provided, (A) is an example provided in a range slightly longer than a quarter of the opening, and (B) is symmetrical with respect to the opening. (C) shows an example provided along the entire circumference of the opening.
FIGS. 5A and 5B are diagrams showing a vanishing model provided with a wall portion for a backflow prevention wall, wherein FIG. 5A shows a longitudinal sectional view of the entire vanishing model, and FIG. 5B shows a perspective view of a single receiving port.
6A and 6B are views showing a separate type receiving port, in which FIG. 6A is a longitudinal sectional view showing a state where the receiving port is attached to a pipe joint body, FIG. 6B is a side view of the receiving unit alone, and FIG. ) It is an arrow view, and is a rear view of the receptacle alone.
FIG. 7 is a cross-sectional view of a conventional drainage collecting pipe joint having no backflow prevention wall. In this figure, the drainage is indicated by an arrow, and the state where the toilet drainage branches after colliding with the opposing wall surface and flows backward to the receiving port for miscellaneous drainage is shown.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Drainage pipe joint 2 ... Upper receptacle, 3 ... Lower connection port, 4 ... Trunk 5 ... Toilet drain receptacle 6 ... Miscellaneous drainage receptacle, 6a ... Opening part 7 ... Tapered pipe part, 8 ... Deceleration Guide, 9 ... Ventilation adjustment guide 10 ... Backflow prevention wall (1/4 round type)
11 ... Backflow prevention wall (reverse U-shaped type)
12 ... Backflow prevention wall (all-round type)
D ... Side branch pipe Z for toilet drainage Z ... Side branch pipe H for miscellaneous drainage H ... Toilet drainage, h ... Toilet drainage 20 after branching ... Disappearance model 21 ... Disappearance model 21a ... Opening part, 21b ... Wall 30 ... Separate type receptacle 30a ... Opening, 30b ... Backflow prevention wall

Claims (6)

The barrel is provided with a plurality of receptacles for connecting a plurality of drainage horizontal branch pipes to the drainage standpipe, and the plurality of receptacles are in a positional relationship orthogonal to each other with respect to the position around the pipe axis , and each of the centers of the trunks The drainage that flows in from one receiving port crosses the center of the trunk and collides with the inner wall surface of the pipe that faces the receiving port and branches to the left and right, and then travels along the inner wall surface of the pipe. In the drainage collecting pipe joint that goes to the receiving side of the
Drainage formed by projecting a backflow prevention wall toward the inside of the pipe joint along the side of the drainage collision side of the opening on the inner wall surface of the pipe joint of the other receptacle, and wrapping around the other receptacle A drainage collecting pipe joint configured to prevent backflow to the opening on the inner wall surface side of the pipe joint of the other receptacle.   The drainage collecting pipe joint according to claim 1, wherein the one receiving port is a side branch receiving port for toilet drainage, and the other receiving port is a side branch receiving port for miscellaneous drainage.   The drainage collecting pipe joint according to claim 1 or 2, wherein a backflow prevention wall is formed along the side and upper part of the opening.   The drainage collecting pipe joint according to claim 1 or 2, wherein a backflow prevention wall is formed along the entire circumference of the opening.   The drainage collecting pipe joint according to any one of claims 1 to 4, wherein the receiving port is manufactured separately from the pipe fitting main body, and a backflow prevention wall is formed on the receiving side of the separate type. Drainage collecting pipe joint.   It is a vanishing model for a receptacle used when producing the drainage collecting pipe joint according to any one of claims 1 to 5 by a vanishing model casting method, and a backflow prevention wall projecting inward from the inner wall of the pipe joint. Disappearance model for manufacturing drainage collecting pipe joints, characterized by forming a wall for use.

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