JP5661356B2 - Drainage pipe fitting - Google Patents

Description

  The present invention is a drainage used for renewal of an existing drainage facility in which a body portion of a drainage pipe joint formed in a plane oval funnel shape is inserted into a concrete slab that partitions an upper floor and a lower floor of an apartment house. It relates to pipe joints.

FIG. 5 shows a side view of a drainage facility 100 that is frequently used in middle-rise apartment buildings that are over 20 years old. The drainage facility 100 connects a drainage stack 102 extending in the height direction, a drainage horizontal branch pipe (not shown) provided on each floor, and drainage stacks 102 on the upper floor and the lower floor, A drainage pipe joint 120 for connecting the drainage horizontal branch pipe to the drainage stack 102 is provided. The drainage pipe joint 120 decelerates the drainage flowing down from the drainage stack 102 on the upper floor by bending it in the lateral direction (leftward in the figure), and after flowing down the left side of the trunk portion 122, the drainage stand on the lower floor It is configured to be guided to the tube 102. The drainage from the drainage side branch pipe is guided to the right side of the trunk portion 122. Thereby, the wastewater flowing down from the drainage stack 102 on the upper floor and the wastewater flowing in from the drainage side branch pipe are less likely to interfere with each other.
In the drainage pipe joint 120, the drainage of the drainage stack 102 on the upper floor is guided to the left side of the trunk part 122, and the drainage of the drainage side branch pipe is guided to the right side of the trunk part 122. The lower part of the trunk | drum 122 is formed in the planar oval funnel shape. And the lower part of the trunk | drum 122 of the drainage pipe joint 120 is penetrated by the concrete slab C which partitions off the upper floor and lower floor of a housing complex.
Here, Patent Document 1 discloses a drainage pipe joint configured to guide the drainage of the upper drainage stack 102 to one side of the trunk part 122 and lead the drainage of the drainage horizontal branch pipe to another side of the trunk part 122. ing.

  In the case of renewing the drainage equipment 100 described above, first, the existing drainage stack 102 and drainage horizontal branch pipe are cut and removed, and then the mortar that fills the gap between the existing drainage pipe joint 120 and the concrete slab C. M is destroyed and the existing drainage pipe joint 120 is removed. Next, a new large-diameter through-hole is formed at the position of the existing through-hole CH in accordance with the outer diameter of the body portion of a new drainage pipe joint (not shown). Then, a new drainage pipe joint is set using the newly formed through hole, and a new drainage stack and drainage side branch pipe are piped using the drainage pipe joint.

JP 2001-50460 A

  However, in the above-described method for renewing the drainage equipment 100, after destroying the mortar M filling between the existing drainage pipe joint 120 and the concrete slab C and removing the drainage pipe joint 120, the concrete slab C has a new large diameter. It is necessary to form a through hole. For this reason, renewal work becomes large and vibration, noise, and dust are generated. In addition, it is necessary to treat and cure muddy water at the time of opening the through hole.

  The present invention has been made to solve the above-mentioned problems, and the technical problem of the present invention is to provide a new drainage pipe joint using a through hole after an existing drainage pipe joint is pulled out from a concrete slab. It is necessary to prevent the renewal work from becoming large and to prevent generation of vibration, noise, and dust.

The above-described problems are solved by the inventions of the claims.
The invention of claim 1 is used for renewing an existing drainage facility in which a body portion of a drainage pipe joint formed in a flat oval funnel shape is inserted into a concrete slab separating an upper floor and a lower floor of a housing complex. A drain pipe joint that is coaxially provided with an upper receptacle to which a drainage stack on the upper floor is connected, and is formed into a plane true circle having a smaller diameter than the upper trunk, and an upper trunk formed in a plane true circle It is formed and provided coaxially with the upper trunk part, and is formed into a plane oval shape between the lower connection part to which the drainage stack on the lower floor is connected, and the upper trunk part and the lower connection part. is formed in a funnel shape, provided with an inclined outer peripheral surface, the flat oblong maximum diameter dimension has a central body portion that is smaller than the diameter of the upper body portion, said central body parts are in diameter equal to the lower connecting portion formed on the semi-cylindrical body portion right torso left The slanted outer peripheral surface is formed by a flat wall portion connecting the right side of the body portion and the left side of the body portion, and the horizontal dimension of the flat plate portion gradually decreases as it approaches the lower end of the central body portion. The central body is configured to be able to be inserted into a through hole after an existing drainage pipe joint is pulled out from the concrete slab, and an inclined outer peripheral surface of the central body is inclined to the through hole. It is the structure which contact | abuts to the inner peripheral surface which was made and is supported from the downward direction, The blade | wing for turning the waste_water | drain which flows down is provided inside the said center trunk | drum, It is characterized by the above-mentioned.

According to the present invention, the central body portion of the drainage pipe joint is configured to be able to be inserted into a through hole formed in a planar oval funnel shape after the existing drainage pipe joint is pulled out from the concrete slab. The inclined outer peripheral surface of the portion abuts against the inclined inner peripheral surface of the through hole and is supported from below. That is, a new drainage pipe joint can be installed using the through hole after the existing drainage pipe joint is pulled out from the concrete slab.
This eliminates the need to destroy the mortar or reopen a large-diameter through-hole at the position of the existing through-hole, thereby reducing the number of renewal work and reducing vibration and noise. No need for muddy water treatment and curing.
Moreover, since the blade | wing for turning the waste_water | drain flowing down is formed inside the center trunk | drum part of a drainage pipe joint, the waste_water | drain which flows down can be decelerated by turning and drainage efficiency can be improved. For this reason, compared with the existing drainage pipe joint, drainage performance does not fall.

According to invention of Claim 2, a blade | wing is provided in the trunk | drum right side of the center trunk | drum formed in the plane oval shape , or the trunk | drum left side .
For this reason, the dimension from the protrusion end of a blade | wing to the center of a center trunk | drum can be set comparatively large, and the ventilation | gas_flowing part of the center of a drainage pipe joint can be ensured favorably.

  According to the present invention, it becomes possible to install a new drainage pipe joint using the through hole after the existing drainage pipe joint is pulled out from the concrete slab, and the renewal work does not become large, and vibration, noise, Dust is not generated.

It is a side surface (A figure, B figure) showing the update method of the drainage equipment of the apartment house which uses the drain pipe joint which concerns on Embodiment 1 of this invention. The longitudinal cross-sectional view (A figure), the top view (B figure), CC arrow view (C figure) of A figure, and center trunk | drum showing the lower trunk | drum of the drain pipe joint which concerns on Embodiment 1 of this invention It is a plane sectional view (D figure). It is the front view (A figure) showing the state which compared the magnitude | size of the said drain pipe joint and the existing drain pipe joint, and a side view (B figure). It is the side view at the time of removing the existing drainage pipe joint (A figure), the longitudinal cross-sectional view (B figure) showing the through-hole after the removal of the said drainage pipe joint, and the top view (C figure) of the said through-hole. . It is a side view showing the conventional drainage equipment.

[Embodiment 1]
Hereinafter, based on FIGS. 1-4, the renewal method of the drainage pipe joint 20 which concerns on Embodiment 1 of this invention, and the drainage equipment 10 using this drainage pipe joint 20 is demonstrated.
<About drain pipe joint 20>
The drainage pipe joint 20 according to the present embodiment is a joint used when the old drainage system 100 shown in FIG. 5 is updated, and after the existing drainage pipe joint 120 is pulled out from the through hole CH of the concrete slab C. , And can be set in the through hole CH.
As shown in FIG. 1, the drainage pipe joint 20 according to the present embodiment includes a vertically-divided body part, and the body part is composed of a substantially cylindrical upper body 22 and a lower body 30. . The upper body 22 includes a lower flange 29 at the lower end position, and the lower body 30 includes an upper flange 31 at the upper end position. Then, the lower flange 29 of the upper body 22 and the upper flange 31 of the lower body 30 are connected via a packing (not shown), so that the upper body 22 and the lower body 30 are coaxially connected in a watertight state. The
As shown in FIG. 1, an upper receiving port 24 into which the lower end insertion port 11 s of the inner tube 11 of the drainage stack 12 (fireproof double-layer tube) is inserted and connected is formed at the upper end of the upper body 22. A substantially cylindrical sealing material (not shown) that seals between the lower end insertion port 11 s of the drainage stack 11 and the upper receiving port 24 in a watertight state is fitted inside the upper receiving port 24.
Further, the upper body 22 has a slightly larger diameter at a position below the upper receiving port 24, and an upper lateral branch in which a drainage lateral branch pipe (not shown) for sewage is inserted and connected to a side surface of the expanded diameter portion. The tube receiving port 25 is formed sideways. A substantially cylindrical sealing material (not shown) that seals between the insertion port of the drainage horizontal branch pipe for sewage and the upper side branch pipe receptacle 25 in a watertight state is fitted inside the upper transverse branch receptacle 25. ing.

As shown in FIG. 2A, the lower body 30 of the drainage pipe joint 20 includes an upper body part 34, a central body part 35, and a lower connection part 36. The upper trunk portion 34 of the lower body 30 is set to have the same diameter as that of the enlarged diameter portion of the upper body 22, and a lower lateral branch in which a drainage lateral branch pipe (not shown) for miscellaneous drainage is inserted and connected to the side surface. The tube receiving port 32 is formed sideways. Further, on the inner peripheral surface 34e of the upper trunk portion 34, a flange portion 38 is provided on the upper side of the lower side branch pipe receiving port 32 so that the drained water does not flow into the opening portion of the lower side branch pipe receiving port 32. .
As shown in FIG. 2B, the upper body portion 34 is formed in a perfect circle shape with an inner diameter R0, and is positioned coaxially with a lower-diameter lower connection portion 36 formed in a perfect circle shape with an inner diameter R1. (R1 <R0).

As shown by a thick line in FIG. 2 (B), the central body portion 35 is a planar oval body portion that is formed long in the axial direction (left-right direction) of the lower lateral branch pipe receiving port 32. FIG. As shown in FIG. 2, the drainage pipe joint 120 is pulled out and inserted into the through hole CH of the concrete slab C.
As shown in FIG. 2 (D), the central body portion 35 has a semi-cylindrical body right side 351, a semi-cylindrical body left side 352, and a flat wall connecting the body right side 351 and the body left side 352. Part 354. The semi-cylindrical trunk right side 351 is positioned coaxially (center O) with the lower connection portion 36 and has the same inner diameter R1. The semi-cylindrical body left side 352 has the same diameter (= R1) as the body right side 351, and the position of the center Ox is shifted to the left from the center O of the body right side 351 by the dimension (R0-R1). Has been. That is, the left end position of the outer peripheral surface of the left side 352 of the central body portion 35 is continuous with the left end position of the outer peripheral surface of the upper body portion 34 (see FIG. 2A).
Furthermore, in the lower part of the central body part 35, the length dimension (left and right dimension) of the flat wall part 354 connecting the body right side 351 and the body left side 352 gradually decreases as it approaches the lower end, and the body left side 352 becomes the body part. It approaches the right side 351. As a result, an outer peripheral surface 35 s (hereinafter referred to as an inclined outer peripheral surface 35 s) inclined at the position of the left side 352 of the body portion (see FIG. 2A) is formed at the lower portion of the central body portion 35. And in the lower end position of the center trunk | drum 35, the trunk | drum left side 352 and the trunk | drum right side 351 are directly connected, become a perfect circle, and are connected to the lower side connection part 36. FIG. That is, the lower portion of the central body portion 35 is formed in a planar oval funnel shape and is connected to the lower connection portion 36.
Here, the inclination of the inclined outer peripheral surface 35s provided in the lower part of the central body portion 35 is the inclination of the inclined outer peripheral surface 122s formed in the body portion 122 of the existing drainage pipe joint 120 shown in FIGS. It is set to a value equal to the inclination of the inner peripheral surface Hs in which the hole CH is inclined.

On the inner peripheral surface 35e (the inner peripheral surface 35e on the side facing the lower lateral branch pipe receiving port 32) on the left side 352 of the central body portion 35, there is a sector shape that causes the drained water to flow counterclockwise in FIG. A blade 37 is provided. Here, the inclination θ of the blade 37 with respect to the axis of the lower body 30 is set to θ = 30 °.
As shown in FIG. 1 (B), the lower side connection part 36 is a straight pipe insertion port inserted and connected to the upper receiving port 12u of the drainage stack 12 on the lower floor, and the drainage pipe joint 20 penetrates the concrete slab C. It is configured to protrude downward from the concrete slab C in a state set in the hole CH.
Further, the lower connecting portion 36 of the drainage pipe joint 20 is set to have a slightly smaller diameter than the straight pipe part 124 (see FIG. 4A) of the existing drainage pipe joint 120.
Here, the upper body 22 of the drainage pipe joint 20 and the upper body part 34 of the lower body 30 correspond to the upper body part of the present invention.

<About the update method of the drainage equipment 100>
Next, a procedure for updating the drainage facility 100 shown in FIG. 5 using the drainage pipe joint 20 described above will be described.
First, in FIG. 5, the existing drainage stack 102 and drainage horizontal branch pipe (not shown) are cut at the upper side and the lower side of the concrete slab C, and the cut existing drainage stack 102 and the like are removed. Next, as shown in FIG. 4A, the existing drainage pipe joint 120 is pulled out using a hydraulic jack or the like (not shown) and removed. Accordingly, as shown in FIGS. 4B and 4C, the concrete slab C has a shape that is the same as the lower portion of the body portion 122 of the drainage pipe joint 120, that is, a through hole formed in a planar oval funnel shape. The hole CH is left.
In this way, when the existing drainage stack 102 and the drainage pipe joint 120 are removed, as shown in FIG. 1A, a new drainage stack 12 is installed in the state where the drainage stack 12 on the lower floor is installed. The drain pipe joint 20 is set in the through hole CH of the concrete slab C.

As described above, since the lower connection portion 36 of the drainage pipe joint 20 is set to have a slightly smaller diameter than the straight pipe part 124 of the existing drainage pipe joint 120, the straight pipe of the existing drainage pipe joint 120. It is possible to pass the lower connection portion 36 of the drainage pipe joint 20 through the opening Hh (see FIGS. 4B and 4C) of the through hole CH after the portion 124 is pulled out. Further, the inclination of the inclined outer peripheral surface 35 s provided in the central body portion 35 of the drainage pipe joint 20 is set to a value equal to the inclination of the inclined outer peripheral surface 122 s formed in the body portion 122 of the existing drainage pipe joint 120. Therefore, the inclined outer peripheral surface 35s of the central body portion 35 is supported by the inclined inner peripheral surface Hs (inclined inner peripheral surface Hs) of the through hole CH.
Therefore, the lower connecting portion 36 of the drainage pipe joint 20 is passed through the opening Hh of the through hole CH, the central body portion 35 is inserted into the through hole CH, and the inclined outer peripheral surface 35s of the central body portion 35 is passed through the through hole. The drainage pipe joint 20 is set in the through-hole CH of the concrete slab C as shown in FIG. Here, when the drainage pipe joint 20 is set in the through hole CH of the concrete slab C, the lower connection portion 36 of the drainage pipe joint 20 is the upper receptacle of the drainage stack 12 on the lower floor that has been previously installed. 12u is inserted and connected in a watertight manner.
When the drainage pipe joint 20 is set in the through hole CH of the concrete slab C in this way, the lower end insertion port 11s of the drainage stack 12 on the upper floor is then inserted and connected to the upper receiving port 24 of the drainage pipe joint 20. Further, a drainage side branch pipe (not shown) on the upper floor is inserted and connected to the upper side branch pipe receptacle 25 and the lower side branch pipe receptacle 32 of the drainage pipe joint 20.
3A and 3B are a front view and a side view comparing the sizes of the existing drainage pipe joint 120 and the updated drainage pipe joint 20. According to the drainage pipe joint 20 according to the present embodiment, the drainage can be made to flow straight without being bent sideways, so that the body portion can be greatly downsized as compared with the existing drainage pipe joint 120.

<Advantages of Drainage Pipe Joint 20 According to this Embodiment>
According to the drain pipe joint 20 according to the present embodiment, the central body portion 35 of the lower body 30 has a through hole CH formed in a planar oval funnel shape after the existing drain pipe joint 120 is pulled out from the concrete slab C. The inclined outer peripheral surface 35s of the central body portion 35 is configured to be in contact with the inclined inner peripheral surface Hs of the through hole CH and supported from below. That is, a new drainage pipe joint 20 can be installed using the through hole CH after the existing drainage pipe joint 120 is pulled out from the concrete slab C.
This eliminates the need to destroy the mortar or re-open the large-diameter through hole at the position of the existing through-hole CH, thereby reducing the number of renewal man-hours and reducing vibration and noise. No muddy water curing is required.
Moreover, since the blade | wing 37 for turning the waste_water | drain flowing down is formed inside the center trunk | drum 35 of the drain pipe joint 20, it can decelerate the waste_water | drain flowing down by turning and can improve drainage efficiency. it can. For this reason, compared with the existing drainage pipe joint 120, drainage performance does not deteriorate.
Further, since the blade 37 is provided at an end portion (left end portion) in the longitudinal direction of the central barrel portion 35 formed in a plane oval shape, the dimension from the protruding end of the blade 37 to the center of the central barrel portion 35 is set. It can be set relatively large, and the ventilation portion at the center of the drainage pipe joint 20 can be secured satisfactorily.

<Example of change>
Here, the present invention is not limited to the above-described embodiment, and can be modified without departing from the gist of the present invention. For example, in this embodiment, in the vertically divided drainage pipe joint 20 composed of the upper body 22 and the lower body 30, the upper body portion 34, the central body portion 35, and the lower side connection portion 36 are provided on the lower body 30. An example of forming was shown. However, it is also possible to form the upper and lower body parts 34, the central body part 35, and the lower connection part 36 in the body part by integrating the body part vertically.
Further, in the present embodiment, an example in which the inclination of the inclined outer peripheral surface 35s provided in the central body portion 35 of the drain pipe joint 20 is equal to the inclination of the inclined inner peripheral surface Hs of the through hole CH is shown. However, as long as the inclined outer peripheral surface 35s of the drainage pipe joint 20 can be supported by the inclined inner peripheral surface Hs of the through hole CH, there is no problem even if the inclinations of the both 35s and Hs are slightly different.
In addition, although the example in which the inclination θ of the blade 37 for swirling the drainage flowing down is set to 30 ° with respect to the axis, the inclination angle θ can also be set to 30 ° ± 5 °.

22 ... Upper body (upper body)
30... Lower torso 34... Upper torso 35... Center torso 35 s ... Inclined outer peripheral surface (inclined outer peripheral surface)
36... Lower side connection part 37... Blade CH... Through hole Hs ... Inclined inner peripheral surface (inclined inner peripheral surface)
θ ・ ・ ・ ・ ・ Inclination angle

Claims (2)

This is a drainage pipe joint used for renewal of existing drainage equipment in which the body of a drainage pipe joint formed in the shape of a flat oval is inserted in a concrete slab that partitions the upper and lower floors of an apartment house. And
The upper trunk that is coaxially provided with the upper receptacle to which the drainage stack on the upper floor is connected, and an upper trunk portion that is formed in a flat circular shape,
Formed in a plane true circle having a smaller diameter than the upper body part, provided coaxially with the upper body part, a lower connection part to which a drainage stack on the lower floor is connected, and
A flat oval funnel is formed between the upper body part and the lower connection part, and has an inclined outer peripheral surface, and the maximum diameter dimension of the planar oval is larger than the diameter dimension of the upper body part. has a that is set smaller middle body portion,
The central body part is composed of a right side of the body part, a left side of the body part, and a flat wall part connecting the right side of the body part and the left side of the body part formed in a semi-cylindrical shape with the same diameter as the lower connection part. In addition, the inclined outer peripheral surface is formed by gradually decreasing as the horizontal dimension of the flat plate portion approaches the lower end of the central body portion,
The central body portion is configured to be able to be inserted into a through hole after an existing drainage pipe joint is pulled out from the concrete slab, and an inclined outer peripheral surface of the central body portion is formed into an inclined inner peripheral surface of the through hole. It is configured to abut and be supported from below,
A drainage pipe joint, characterized in that a vane for swirling the draining water is provided inside the central body part. A drainage pipe joint according to claim 1,
The drainage pipe joint according to claim 1, wherein the blade is provided on the right side of the trunk part of the central trunk part formed in a plane oval shape or on the left side of the trunk part .

Images