JP2013204363A - Drainage system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a highly-functional drainage system which can be installed mainly in a narrower space and has higher drainage performance (conveying performance).SOLUTION: Drainage piping 21 is connected between drainage equipment and a catch basin or a vertical drainage pipe. The drainage piping 21 is provided with a clogging prevention mechanism 24 which is capable of preventing negative pressure from being generated at an upstream side of a clogged portion when an inside of the drainage piping 21 is partially clogged by drainage water 22.

Description

  The present invention relates to a drainage system.

  For example, drainage systems are installed in houses such as detached houses and apartment houses. Such drainage systems include, for example, drainage piping such as toilet piping connected to the outlet of drainage equipment such as toilets, drainage piping connected to other drainage devices, etc. 1).

  Among such drainage pipes, a toilet pipe 1 as shown in FIG. 23 is connected to a discharge port 4 of a toilet 3 installed on the floor surface 2 via a connection socket 5, for example. Since the opening 6 formed in 2 extends downward to the underfloor space 7 and is further changed in the lateral direction along the underfloor space 7, the toilet pipe 1 is , At least, a straight pipe portion 8 (upstream pipe portion, vertical pipe portion) extending downward from the discharge port 4 of the toilet 3, a bent pipe portion 9 connected to the lower end portion of the straight pipe portion 8, and the bent portion The pipe structure is provided with a straight pipe part 10 (downstream pipe part, horizontal pipe part) connected to the outlet part of the pipe part 9 and extending in the lateral direction with a required drainage gradient.

  In general, the toilet bowl 3 is often installed in a state of being considerably close to the back wall 11a of the toilet room 11, and the toilet pipe 1 secures a space in the underfloor space 7. Since the direction is often changed toward the front side of the easy toilet 3 (so-called forward swing), as shown in FIG. 24, the drainage 12 is along the front half-circumferential wall portion 8 a in the straight pipe portion 8. It tends to flow down. In this case, the connection socket 5 is also shaped to be eccentric to the front side of the toilet bowl 3 in order to secure a pipe mounting space.

  In such a situation, when the drainage 12 that flows along the front half peripheral wall portion 8a in the straight pipe portion 8 is changed in direction by the bent pipe portion 9, the bent pipe portion 9 cannot be bent well and bent. There is a risk of staying in the vicinity of the outlet portion of the tube portion 9 (retention portion 12a), and further backflow partially in the bent tube portion 9 along the outer peripheral wall portion (bounce back portion 12b). If a stagnation or backflow occurs in the bent tube portion 9, the outlet portion of the bent tube portion 9 is partially blocked by the drainage 12 (partially becomes full or the bent tube portion 9 There is a possibility that the air passage is lost and a negative pressure is generated in the straight pipe portion 8 (negative pressure generating portion 13).

  Thus, when negative pressure is generated in the straight pipe portion 8, the sealing water 14 of the toilet 3 is drawn into the toilet pipe 1 as indicated by an arrow due to a phenomenon called a self siphon phenomenon, and the sealing water 14 is It will decrease or disappear. Thus, when the sealing water 14 of the toilet bowl 3 decreases or disappears, functions and appearance quality of the toilet bowl 3 are deteriorated, and problems such as odors flowing back through the toilet pipe 1 occur. Become.

  Therefore, in order to prevent such a problem, it is conceivable to install a rectifying means for adjusting the flow of the drainage 12 around the bent pipe portion 9 or destroying the water film as shown in Patent Document 1. .

JP 2003-342984 A

  However, in recent years, water-saving toilets 3 (water-saving toilets) have become mainstream, and the water-saving toilets 3 continue to evolve every day to further improve water-saving performance. In such a water-saving toilet 3, the instantaneous maximum flow rate is extremely large because the reduction of the total drainage amount and the necessary drainage performance can be secured simultaneously by flowing a small amount of drainage 12 at once. The same high drainage performance (conveyance performance) is also required for the toilet piping 1 connected to the water-saving toilet 3.

  On the other hand, in recent houses, the underfloor space 7 tends to be narrowed year by year, and the toilet pipe 1 is placed in a more severe situation.

  For this reason, the existing rectifying means as described above cannot be installed in the underfloor space 7 as it is, or the required drainage performance (conveyance performance) may not be satisfied. There is a demand for the development of a highly functional toilet pipe 1 that can be installed and that can provide higher drainage performance (conveyance performance).

  Furthermore, even when the existing toilet 3 is replaced with a water-saving toilet 3, the existing toilet pipe 1 is very likely to have insufficient drainage performance (conveyance performance), so the water-saving toilet 3 It is necessary to update to a highly functional one that can handle the above.

  In addition, such a situation may arise similarly about drainage pipes other than the toilet pipe 1.

  In order to solve the above-mentioned problems, the present invention is provided on the upstream side of the blocked portion by partially draining the interior between the drainage device and the drainage basin or drainage vertical pipe. It is characterized by a drainage system connected to a drainage pipe provided with a blocking prevention mechanism capable of preventing the occurrence of negative pressure.

  According to the present invention, since the blocking prevention mechanism prevents the drainage pipe from being partially blocked by drainage, negative pressure is generated inside the drainage pipe connecting the drainage equipment and the drainage pipe or drainage vertical pipe. Can be prevented.

It is a schematic side view which shows the drainage system of a detached house. FIG. 2 is a perspective view of FIG. 1. It is a schematic side view which shows the drainage system of an apartment house. It is a disassembled perspective view of the 1st member for piping explaining the piping structure concerning the Example of this invention. It is the longitudinal cross-sectional view which looked from the side by making the member for piping of FIG. 4 into a combined state. FIG. 5 is a plan view of FIG. 4. The 2nd member for piping is shown, (a) is the longitudinal cross-sectional view seen from the side in the combined state, (b) is a top view. The 3rd member for piping is shown, (a) is a disassembled perspective view, (b) is the longitudinal cross-sectional view seen from the side in the combined state. FIG. 4 shows a fourth piping member, where (a) is a perspective view, (b) is an exploded perspective view, and (c) is a longitudinal sectional view as seen from the side in a combined state. The 5th member for piping is shown, (a) is a disassembled perspective view, (b) is the longitudinal cross-sectional view seen from the side in the combined state. The 6th member for piping is shown, (a) is a disassembled perspective view, (b) is the longitudinal cross-sectional view seen from the side in the combined state. The 7th member for piping is shown, (a) is a disassembled perspective view, (b) is the longitudinal cross-sectional view seen from the side in the combined state. The 8th member for piping is shown, (a) is a disassembled perspective view, (b) is the longitudinal cross-sectional view seen from the side in the combined state. The 9th member for piping is shown, (a) is a disassembled perspective view, (b) is the longitudinal cross-sectional view seen from the side in the combined state. It is the longitudinal cross-sectional view which looked at the member for piping explaining the piping structure concerning Example 2 of this invention from the side. It is a top view of the modification of FIG. The piping structure concerning Example 3 of this invention is shown, (a) is a top view, (b) is a longitudinal cross-sectional view of a bending pipe part. 17 is a modification of FIG. 17, (a) is a plan view, and (b) is a vertical cross-sectional view of the bent tube portion. It shows the piping structure concerning Example 4 of this invention, and shows the piping structure similar to FIG. 17 provided with the rectification | straightening part directly with respect to the air intake part, (a) is a top view, ( b) is a longitudinal sectional view of the bent tube portion. It is the same modification as FIG. 18 provided with the rectification | straightening part directly with respect to the air intake part, (a) is a top view, (b) is a longitudinal cross-sectional view of a bending pipe part. It is a modification which shows the piping structure similar to FIG. 17 which attached the straight pipe member provided with the rectification | straightening part with respect to the air intake part, (a) is a top view, (b) is a longitudinal cross-sectional view of a bending pipe part It is. It is a modification similar to FIG. 18 which attached the straight pipe member provided with the rectification | straightening part with respect to the air intake part, (a) is a top view, (b) is a longitudinal cross-sectional view of a bending pipe part. It is the partially broken side view explaining the piping structure concerning a prior art example. It is the longitudinal cross-sectional view which expanded FIG. 24 partially and was seen from the side.

  Hereinafter, the present embodiment and examples embodying the present embodiment will be described in detail with reference to the drawings.

  FIGS. 1-22 shows an Example and its modification. Of these, FIGS. 1 to 3 are building drainage systems, FIGS. 4 to 14 are Embodiment 1, FIGS. 15 and 16 are Embodiment 2, FIGS. 17 and 18 are Embodiment 3, and FIGS. It is Example 4.

  First, the drainage system for buildings such as detached houses and apartment houses will be described.

  1 and 2 show a drainage system for a detached house. A floor surface 53 is installed above a foundation 51 with a required underfloor space 52. On the floor surface 53, drainage devices such as a toilet bowl 54, a wash basin 55, a bathtub 56, a kitchen sink 57, and a washing machine 58 are installed. Although not particularly illustrated, these drainage devices are appropriately installed in a toilet, a washroom, a bathroom, a kitchen, and the like, respectively. Further, drain pipes such as a toilet pipe 64, a wash pipe 65, a bath pipe 66, a kitchen pipe 67, and a washing machine pipe 68 are connected to the discharge ports 59 of these drainage devices.

  These drainage pipes are connected individually or individually after drainage header 70 (see drainage collecting pipe, see FIG. 2), and then connected to drainage basin 69 installed outside foundation 51. In the middle of the drainage pipe, a drainage flexible pipe 62 is provided so as to pass through the inside of the foundation 51 through the inside of the sheath pipe 61 embedded in the foundation 51.

  FIG. 3 shows a collective housing drainage system, in which a floor surface 53 having a required underfloor space 52 is installed above a floor slab 63 that divides the upper and lower tiers. On the floor surface 53, drainage devices such as a toilet bowl 54, a wash basin 55, a bathtub 56, a kitchen sink 57, and a washing machine are installed. Although not particularly illustrated, these drainage devices are appropriately installed in a toilet, a washroom, a bathroom, a kitchen, and the like, respectively. Further, drain pipes such as a toilet pipe 64, a wash pipe 65, a bath pipe 66, a kitchen pipe 67, and a washing machine pipe are connected to the discharge ports 59 of these drainage devices.

  These drainage pipes are connected to a drainage vertical pipe 71 provided in a common space of a building or the like directly or via a drainage header 70 (drainage collecting pipe, not shown). The drainage vertical pipe 71 extends in the vertical direction so as to penetrate between the upper and lower floors, and in the middle of the drainage vertical pipe 71, a collective pipe joint 72 for connecting the drainage pipe is provided for each floor. is set up. Although not shown in the drawing, the collecting pipe joint 72 has a swirl vane inside, and the swirl vane generates a swirling flow in the drainage flowing through the inside, whereby an air passage is formed in the central portion of the collecting pipe joint 72. (Air core) is configured to be secured. Further, the collecting pipe joint 72 is mainly composed of a resin having fire resistance, and by using a partially heat-expandable resin, the heat-expandable resin expands in the event of a fire. It is comprised so that a flame etc. can be shut off.

  And the following structures are applied to the bent part A and other parts of the drainage pipe constituting the drainage system of the building as necessary. Alternatively, at least one or more of the structures described above can be provided on the bent portion A, the upstream side (the piping member) or the downstream side (the piping member) of the bent portion A, and the like. Further, the drainage device and the drainage pipe may be other than those described above. And the building where the above-mentioned drainage system is provided is not restricted to the above-mentioned detached house and apartment house.

  Next, an outline of this embodiment will be described.

  In this embodiment, the following configuration is provided.

  (Configuration 1) Between the drainage device (the toilet bowl 54, the wash basin 55, the bathtub 56, the kitchen basin 57, the washing machine 58) and the drainage basin 69 or the drainage vertical pipe 71, the inside is partially blocked by the drainage 22. The drainage pipe (toilet pipe 64, wash pipe 65, bath pipe 66, toilet pipe 64 provided with a clogging prevention mechanism 24 that can prevent negative pressure from being generated upstream of the blocked part by being peeled off. The kitchen pipe 67, the washing machine pipe 68, and so on are connected).

  (Configuration 2) The above-described blockage prevention mechanism 24 regulates the flow of the drainage 22 inside the drainage pipe to prevent partial blockage of the drainage pipe (spiral blade 26 (for example, see FIG. 4), jump plate) 81, 81a (for example, see FIGS. 15 and 16)) and an air intake portion (eccentric double pipe 88 (for example, for example) that can prevent partial blockage of the drain pipe by taking air into the drain pipe. 17))), and at least one of them.

  (Configuration 3) The rectifying unit described above is a spiral blade 26 extending so as to constitute at least a part of a spiral along the inner wall of the drainage pipe (see, for example, FIG. 5).

  (Structure 4) The above-mentioned rectification | straightening part is made into the jump board 81 and 81a which protruded from the inner wall of drainage piping (for example, refer FIG. 15).

  (Configuration 5) The rectifying unit described above is provided in the remaining portion secured in a state where the minimum required passage portion 27 having a circular cross section required to flow the drainage 22 into the drainage pipe is shifted to one side, The rectifying unit described above is provided in the semi-peripheral wall portion 21b opposite to the semi-peripheral wall portion 21a on the side where the minimum necessary passage portion 27 is set, and the rectifying unit described above is directed toward the downstream side of the flow of the drainage 22. Provided with a mounting angle 31 that is inclined (see, for example, FIGS. 5 and 6).

  (Structure 6) The above-mentioned air intake part is integrated with the outer periphery of the inner pipe part 87 for drainage in the state eccentric to the inner pipe part 87 for drainage and the inner pipe part 87 for drainage. Thus, the eccentric double pipe 88 having the ventilation outer pipe portion 86 which forms the ventilation space 88a between the drainage inner pipe portion 87 and the drainage inner pipe portion 87 (see, for example, FIG. 17).

  (Configuration 7) The blockage prevention mechanism 24 described above is installed within the range of the minimum connection length 32 required for the minimum connection of the drainage pipe to the drainage device (see, for example, FIG. 5).

  (Configuration 8) The blocking prevention mechanism 24 described above is installed on the entry side of the bent portion A provided in the drain pipe (for example, see FIGS. 1 and 4).

  (Configuration 9) The rectifying unit described above guides the drainage 22 toward the bending start portion 25 of the large bending portion 23a of the bending portion A (see, for example, FIG. 5).

  (Configuration 10) The drainage device described above is a toilet 54 installed on the floor surface 53. The drainage pipe described above is connected to the outlet 59 of the toilet bowl 54 described above and penetrates the floor surface 53 described above. The toilet pipe 64 is extended to the underfloor space 52 and further turned in the lateral direction along the underfloor space 52.

  (Configuration 11) The drainage device described above is at least one of the wash basin 55, the bathtub 56, the kitchen stool 57, and the washing machine 58, and the drainage piping described above includes the wash piping 65, the bath piping 66, At least one of the kitchen pipe 67 and the washing machine pipe 68 is used.

  (Configuration 12) A plurality of the above drainage devices are provided, drainage pipes are connected to each drainage device, and at least one blockage prevention mechanism 24 is installed for at least two of the drainage pipes. In addition, the blocking prevention mechanism 24 installed by the drainage pipe can be made different.

  (Configuration 13) The above-described blockage prevention mechanism 24 regulates the flow of drainage inside the drainage pipe, thereby preventing partial blockage of the drainage pipe (spiral blade 26 (see, for example, FIG. 4), jump plate 81) 81a (for example, see FIGS. 15 and 16)) and an air intake portion (eccentric double pipe 88 (for example, for example) that can prevent partial blockage of the drainage pipe by taking air into the drainage pipe. (See FIG. 17))).

  According to the above configuration, the following effects can be obtained.

  (Effect 1) In a drainage system in which drainage equipment and drainage tub 69 or drainage vertical pipe 71 are connected by drainage piping, the drainage piping is partially blocked by drainage 22 in the middle of the drainage piping. By providing the blockage prevention mechanism 24 that can prevent the occurrence of negative pressure upstream from the blocked portion, the blockage prevention mechanism 24 does not partially block the drainage pipe with the drainage 22. Thus, negative pressure can be prevented from being generated inside the drainage pipe connecting the drainage equipment and the drainage tub 69 or the drainage vertical pipe 71.

  (Effect 2) The blockage prevention mechanism 24 arranges the flow of the drainage 22 inside the drainage pipe to prevent partial blockage of the drainage pipe, and the air taken into the drainage pipe is taken into the drainage pipe. By providing at least one of the air intake part capable of preventing partial blockage, the rectification unit as the blockage prevention mechanism 24 arranges the flow of the drainage 22 inside the drainage pipe, thereby adjusting the drainage pipe. Partial blockage can be prevented. Moreover, the air intake part as the blockage prevention mechanism 24 can prevent partial blockage of the drainage pipe by taking air into the drainage pipe. And although a rectification | straightening part and an air intake part can each be used independently, the obstruction | occlusion prevention effect can be improved by providing both.

  (Effect 3) Since the rectification part is the spiral blade 26 extending so as to constitute at least a part of the spiral along the inner wall of the drainage pipe, the flow of the drainage 22 can be surely described with a simple structure. Since it can be directed to the minimum necessary passage portion 27 and the bending start portion 25 of the large bend portion 23a, the inside of the drainage pipe is partially blocked by the drainage 22, and negative pressure is generated in the drainage pipe. Can be effectively prevented.

  At this time, since the spiral blade 26 converts the drainage 22 into a swirl flow without difficulty in a narrow space, the bending of the minimum required passage portion 27 and the large bend portion 23a starts most efficiently and smoothly without greatly disturbing the flow. It is possible to guide toward the unit 25 and the like. Therefore, it is possible to make the peripheral structure of the spiral blade 26 as compact as possible. In addition, since a necessary air core (air passage) is secured at the center of the swirling flow, it is possible to prevent negative pressure from being generated due to the loss of the air passage in the drain pipe. . Therefore, it is possible to obtain a high-performance drainage system that can be installed in a narrower space and can obtain higher drainage performance (conveyance performance). The drainage 22 guided by the spiral blades 26 flows along the extended locus of the spiral blades 26 due to inertia, so that there is no particular problem even if a part of the spiral blades 26 is missing.

  (Effect 4) By using the jump plates 81 and 81a projecting from the inner wall of the drainage pipe, the flow of the drainage 22 is surely directed to the minimum required passage part 27 and the like described later with a simple structure. Therefore, it is possible to effectively prevent the inside of the drain pipe from being partially blocked by the drain 22 and generating negative pressure in the drain pipe.

  Further, since the jump plates 81 and 81a have a simple structure, it is possible to make the peripheral structure of the jump plates 81 and 81a as compact as possible.

  (Effect 5) The rectifying portion is provided in the remaining portion secured in a state where the minimum required passage portion 27 having a circular cross section necessary for flowing the drainage 22 into the drain pipe is shifted to one side, and the rectifying portion However, it is provided in the semi-peripheral wall part 21b on the side opposite to the semi-peripheral wall part 21a on the side where the minimum required passage part 27 is set, and the rectifying part has an attachment angle 31 that is inclined toward the downstream side of the flow of the drainage 22. Thus, by setting the minimum necessary passage portion 27 inside the drainage pipe, the passage of the drainage 22 inside the drainage pipe can be secured. Moreover, the installation space of a rectification | straightening part can be ensured by shifting the minimum required channel | path part 27 to the one side inside drainage piping. And it can prevent that a rectification | straightening part becomes a cause of clogging of drainage piping by providing a rectification | straightening part in the remaining part except the minimum required channel | path part 27 inside drainage piping.

  In addition, the flow of the drainage 22 that has flowed along the half peripheral wall portions 21a and 21b on the minimum necessary passage portion 27 side can be prevented from being obstructed by the rectifying portion. On the contrary, the flow of the drainage 22 that has flowed along the opposite half circumferential wall portion 21b can be guided to the minimum required passage portion 27 by the rectifying portion. This makes it possible to optimize the rectification unit so as to obtain the maximum rectification effect.

  Furthermore, when guiding the flow of the drainage 22 that has flowed along the opposite half-circumferential wall portion 21b toward the minimum required passage portion 27, the resistance given to the drainage 22 by the rectifying unit is reduced, and noise is generated. In addition to being able to be suppressed, it is possible to prevent the drainage 22 and solid matter contained in the drainage 22 from accumulating at the corner portion between the inner peripheral surface of the drainage pipe and the upstream surface of the rectification unit.

  (Effect 6) The air intake part is integrally provided on the outer periphery of the drainage inner pipe part 87 in a state of being eccentric with respect to the drainage inner pipe part 87 for flowing the drainage 22 and the drainage inner pipe part 87. By being an eccentric double pipe 88 having a ventilation outer pipe part 86 that forms a ventilation space 88a between the drainage inner pipe part 87 and the drainage inner pipe part 87, the drainage inner pipe part 87 and the ventilation pipe Since the ventilation space 88a can be formed structurally with the outer pipe portion 86, the drainage pipe by the drainage 22 is obtained by the air flowing into and out of the drainage inner pipe portion 87 from the ventilation space 88a. It is possible to prevent partial blockage.

  (Effect 7) Since the blockage prevention mechanism 24 is installed within the range of the minimum connection length 32 required for the connection of the drainage pipe to the drainage device, the drainage device and the blockage prevention mechanism 24 Since interference is prevented, the drainage pipe having the blocking prevention mechanism 24 can be reliably attached to the drainage equipment.

  (Effect 8) Since the blocking prevention mechanism 24 is installed on the entry side of the bent portion A provided in the drainage pipe, the drainage 22 changes direction in the bent portion A of the drainage pipe. Although it is one of the positions where it is most likely to occur, by installing the blocking prevention mechanism 24 on the entry side of the bent portion A, partial blocking can be effectively prevented.

  (Effect 9) Since the rectifying unit guides the drainage 22 toward the bending start portion 25 of the large bent portion 23a of the bent portion A, the flow of the drainage 22 is aimed at the bending start line as a pinpoint. It is possible to guide with high accuracy. Therefore, it becomes possible to provide a rectification part limited in a narrower range.

  (Effect 10) The drainage device is a toilet 54 installed on the floor surface 53, the drainage pipe is connected to the outlet 59 of the toilet bowl 54, extends through the floor surface 53 to the underfloor space 52, and The latest water-saving type is that the large amount of drainage 22 is allowed to flow at a stroke (ie, the instantaneous maximum flow rate is extremely large) by the toilet pipe 64 that is diverted laterally along the underfloor space 52. By connecting to the toilet 54 (water-saving toilet) and being disposed in the underfloor space 52 of a recent house, which is becoming narrower, negative pressure is generated due to partial blockage inside the drainage pipe. Even in the piping structure of the harsh situation which becomes easy, the drainage performance (conveyance performance) is improved, the occurrence of negative pressure is effectively prevented, and the sealing water of the toilet 54 is reduced by self-so-called self-siphon phenomenon. Can be reliably suppressed So as to.

  (Effect 11) The drainage device is at least one of the wash basin 55, the bathtub 56, the kitchen stool 57, and the washing machine 58, and the drainage pipes are the wash pipe 65, the bath pipe 66, and the kitchen pipe 67. By using at least one of the washing machine pipes 68, the drainage performance (conveyance performance) can be improved and the latest drainage equipment can be handled in the same manner as described above.

  (Effect 12) A plurality of the drainage devices described above are provided, drainage pipes are connected to each drainage device, and at least one blocking prevention mechanism 24 is installed for at least two of the drainage pipes. In addition, the blockage prevention mechanism 24 installed by the drainage pipe is made different so that the optimum blockage prevention mechanism 24 is selected and used in accordance with the type of drainage equipment, the installation location and the installation situation of the drainage pipe, and the like. And the drainage system as a whole can be made more optimal.

  (Effect 13) The above-described blockage prevention mechanism 24 regulates the flow of drainage inside the drainage pipe to prevent partial blockage of the drainage pipe (spiral blade 26 (see, for example, FIG. 4), jump plate 81) 81a (for example, see FIGS. 15 and 16)) and an air intake portion (eccentric double pipe 88 (for example, for example) that can prevent partial blockage of the drainage pipe by taking air into the drainage pipe. 17))), both functions of the rectifying unit and the air intake unit can be obtained.

  The details will be described in the following examples.

  <Configuration> The configuration will be described below.

(Configuration 1-1)
As shown in FIGS. 4 to 6 (mainly refer to FIG. 5), the drainage pipe of this embodiment has at least a straight pipe portion 21.

  The straight pipe portion 21 is provided with the above-described blocking prevention mechanism 24 so that the drain pipe is partially blocked by the drain 22 so that negative pressure is prevented from being generated inside the drain pipe. Yes.

  The blocking prevention mechanism 24 is a rectifying member (rectifying unit) such as a spiral blade 26.

  In this case, a bent pipe part 23 is provided at the outlet part (downstream side) of the straight pipe part 21. The bent pipe portion 23 can change the direction of the drainage 22 flowing in the straight pipe portion 21. The inner surface of the bent pipe portion 23 is composed of a large bend portion 23a that bends the flow of the drainage 22 along a large curved surface, and a small bend portion 23b that faces the large bend portion 23a. Further, the inner surface of the straight pipe portion 21 described above is composed of a rear semi-peripheral wall portion 21a located on the upstream side of the large bend portion 23a and a front semi-peripheral wall portion 21b located on the upstream side of the small bend portion 23b. Yes.

  The spiral blade 26 described above is capable of guiding the drainage 22 flowing along the front half circumferential wall portion 21 b of the straight pipe portion 21 toward the large bend portion 23 a of the bent pipe portion 23. And it is supposed that a negative pressure is prevented from being generated in the straight pipe part 21 by partially closing the outlet part of the bent pipe part 23 with the drainage 22.

(Supplementary explanation 1-1)
Here, the above-mentioned “straight tube portion 21” has a circular cross section (see FIG. 4). Further, the “bent tube portion 23” has an inlet portion and an outlet portion having a circular cross section. The inlet portion and the outlet portion of the bent pipe portion 23 are usually of the same diameter. The inside of the bent tube portion 23 is bent while maintaining a substantially circular cross section. However, slight deformation of the cross-sectional shape for bending is allowed.

  The “large curved portion 23 a” of the bent pipe portion 23 is a portion (on the outer circumferential side) (on the outer circumferential side) outside the portion where the flow of the drainage 22 is bent. Further, the “small bend portion 23b” is a portion (in the semicircular region) on the inner side (inner peripheral side) of the portion where the flow of the drainage 22 is bent. The “rear-side semi-peripheral wall portion 21 a” of the straight pipe portion 21 is continuous with the semi-circumferential region on the large bend portion 23 a side. The “front-side semi-circumferential wall portion 21b” is continuous with the semi-circumferential region on the small bend portion 23b side.

  The above-described “spiral blade 26” as the rectifying unit is particularly preferable for at least one or all of the bent portions A in which the bent pipe portion 23 is connected to the downstream side of the straight pipe portion 21 in the middle of each drainage pipe. Provided. The straight pipe portion 21 and the bent pipe portion 23 are not limited to those provided in a substantially vertical plane, but can be applied to those provided in a substantially horizontal plane.

  The spiral blade 26 preferably extends along the inner wall of the straight pipe portion 21 so as to constitute at least a part of the spiral. The spiral blade has a spiral shape extending in the circumferential direction and the axial direction around the axis 21c of the straight pipe portion 21. In this case, the spiral blade 26 is a continuous one in order to shorten the installation range in the axial direction (or the circumferential pitch in the axial direction). In the cross-sectional view of FIG. 5, only the lower half of the spiral blade 26 is shown, and the upper half not shown extends obliquely upward in the drawing. About the turning direction of the spiral blade 26, it may be either clockwise or counterclockwise. However, when the drainage 22 flowing from the upstream side is a swirling flow, the drainage 22 is adjusted to the swirling direction. The overall shape of the spiral blade 26 is, for example, as depicted in FIG.

(Configuration 1-2)
At this time, in particular, as shown in FIG. 5, the rectifying portion (as the spiral blade 26) can guide the flow of the drainage 22 toward the bending start portion 25 of the large bending portion 23 a of the bending tube portion 23. It is supposed to be.

(Supplementary explanation 1-2)
The “bending start portion 25” of the large bending portion 23a is literally a position where the large bending portion 23a is started in the bending pipe portion 23. The bending start portion 25 exists over the entire half circumference region on the large bending portion 23a side. The drainage 22 may be aimed at any position as long as it is on this half-circumferential region, but in order to stably lead the entire amount of the drainage 22 guided by the spiral blade 26 to the large bend 23a. Is most preferably set at the center position on the circumference of the half circumference or the periphery thereof (see FIG. 6).

  The spiral blade 26 is provided so as to aim at the bend start portion 25 of the large bend portion 23a. If the lower end of the bend start portion 25 of the large bend portion 23a is aimed, the outlet of the bend tube portion 23 is reliably blocked. It becomes difficult to prevent. Further, when the upper part of the large bent portion 23a is aimed above the bending start portion 25, the outlet portion of the bent tube portion 23 can be prevented from being blocked, but the straight tube portion 21 becomes longer accordingly. Therefore, it is most preferable that the spiral blade 26 is aimed at the bending start portion 25 of the large bend portion 23a as a pinpoint, but if the deviation is about several cm (± 1 to 3 cm) above and below the bending start portion 25. acceptable. Furthermore, when aiming at the bending start portion 25 of the large bend portion 23a, it is desirable to consider the influence of gravity acting on the drainage 22 and the water flow of the drainage 22.

(Configuration 1-3)
And as shown in FIG. 6, the minimum required channel | path part 27 of the circular cross section minimum required to flow the waste_water | drain 22 is ensured in the semicircular wall part 21a of the rear side of the straight pipe part 21. As shown in FIG. And the above-mentioned rectification | straightening part (as the spiral blade 26) is installed in the remaining part except the minimum required channel | path part 27. FIG.

(Supplementary explanation 1-3)
Here, the above-mentioned “minimum required passage portion 27” is set so as to be inscribed in the central portion in the circumferential direction of the rear half circumferential wall portion 21a. The minimum required passage portion 27 is different in size and diameter depending on the type of the drainage 22 flowing through the drainage pipe. When the drainage pipe is a toilet pipe 64, the minimum required passage portion 27 takes into consideration the maximum flow rate of the drainage 22 that flows at one time, the size that allows the solid matter contained in the drainage 22 to pass through without any hindrance, and the like. Is set. For example, in the case of a residential toilet pipe 64, the straight pipe portion 21 has an inner diameter of 70Φ to 80Φ, and the minimum required passage portion 27 has a diameter of approximately 55Φ and extends in the axial direction of the straight pipe portion 21. It has a circular cross section. That is, the minimum necessary passage portion 27 has a relatively large diameter with respect to the inner diameter of the straight pipe portion 21. As a result, the width 26 w of the spiral blade 26 also has a maximum width obtained by subtracting the diameter of the minimum required passage portion 27 from the inner diameter of the straight pipe portion 21.

(Configuration 1-4)
Further, the rectifying unit (as the spiral blade 26) is prevented from sticking out to the rear semi-periphery wall part 21a beyond the front semi-periphery wall part 21b. Therefore, the end portion of the spiral blade 26 is prevented from reaching into the portion 29 outside the minimum required passage portion 27 in the rear half wall portion 21a.

(Supplementary explanation 1-4)
As described above, the spiral blade 26 is installed only on the front half wall portion 21 b of the straight pipe portion 21. That is, the spiral blade 26 is extended over a substantially half circumference or a slightly narrower range than the almost front half wall portion 21b of the straight pipe portion 21 (front wall side rectification portion). .

  In addition, about the both ends of the spiral blade | wing 26, in order to eliminate a corner part and to make it a gentle shape, you may make it give a chamfer as shown in FIG. 6 (cornering part 26a). Or as shown in FIG.7 (b), by providing the gradual change part 26b for preventing a sudden shape change in the whole spiral blade 26, the whole spiral blade 26 is crescent-shaped etc. by planar view etc. You may make it become. In addition, although it is preferable to provide the spiral blade 26 over the whole area of the front half peripheral wall portion 21b in the straight pipe portion 21 as much as possible, it can be slightly shortened as long as there is no functional problem ( (See FIG. 6). On the other hand, it is preferable that the spiral blade 26 does not exceed the front half peripheral wall portion 21b of the straight pipe portion 21, but it is allowed for a slight squeeze out for adjusting an error or a shape. (Refer FIG.7 (b)).

(Configuration 1-5)
Preferably, as shown in FIG. 5, the rectifying unit (as a spiral blade 26) described above is directed toward the downstream side of the flow of the drainage 22 with respect to the direction perpendicular to the tube axis on the inner surface of the straight pipe unit 21. The mounting angle 31 is inclined to be provided.

(Supplementary explanation 1-5)
Here, it is preferable that the attachment angle 31 of the spiral blade 26 with respect to the inner surface of the straight pipe portion 21 is in a range of approximately 50 to 70 degrees. More preferably, it is about 55 to 65 degrees. This is because if the angle is smaller than 50 degrees, the ability to guide the drainage 22 is reduced, and the installation range of the spiral blade 26 in the axial direction of the straight pipe portion 21 is increased. And if it exceeds 70 degree | times, the resistance given to the waste_water | drain 22 will become large, and it is because possibility that a highly viscous solid substance will accumulate will become high.

(Configuration 1-6)
More preferably, the above-described blocking prevention mechanism 24 (as the spiral blade 26) is the minimum connection length required to connect to drainage equipment or drainage pipes provided on the upstream side of the straight pipe portion 21. It should be installed within the range of 32.

(Supplementary explanation 1-6)
Here, the drainage device on the upstream side includes the drainage device itself and a joint portion (for example, the connection socket 5 in FIG. 24) between the drainage device and the straight pipe portion 21. The minimum connection length 32 in this case is the length from the outlet portion (lower end portion in the figure) of the straight pipe portion 21 (more precisely, the straight pipe member 36 described later). Or it is the length from the entrance part of elbow member 35 mentioned below. Thereby, the installation range (installable range) of the spiral blade 26 (rectifying unit) with respect to the axial direction of the straight pipe part 21 is a very short part between the outlet part of the straight pipe part 21 and the minimum length 32 for connection. It will be limited to. And the circulation pitch of the spiral blade | wing 26 with respect to the axial direction of the straight pipe part 21 shall be small according to the said installation range. That is, the spiral blade 26 turns with a gentle gradient toward the downstream side. More specifically, the gradient angle (swivel angle) of the spiral blade 26 is preferably 45 degrees or less. This is because when the gradient angle is larger than 45 degrees, the spiral blade 26 becomes longer in the axial direction, so that it is difficult to shorten the straight pipe portion 21 by being within the range of the minimum connection length 32. This is because it becomes difficult to efficiently guide the drainage 22 to the bending start portion 25 of the large bending portion 23a. A more preferable gradient angle of the spiral blade 26 is 10 degrees to 30 degrees. If it is this range, it becomes possible to make compatible the function which shortens the straight pipe part 21, and the function which guides the waste_water | drain 22 to the bending start part 25 of the large curved part 23a efficiently. For example, in the case of a drainage pipe such as a toilet pipe 1 (see FIG. 24) as described later, the above-described minimum connection length 32 is about 100 mm or less. On the other hand, the winding pitch of the spiral blade 26 is about 80 mm or less.

(Configuration 1-7)
The drainage device provided on the upstream side of the straight pipe section 21 is a toilet 54 installed on the floor surface 53 as shown in FIG. 1 or FIG.

  The straight pipe portion 21 and the bent pipe portion 23 are connected to the discharge port 59 of the toilet 54, extend through the floor surface 53 to the underfloor space 52, and further in the lateral direction along the underfloor space 52. The toilet pipe 64 to be converted is configured.

(Supplementary explanation 1-7)
Here, the straight pipe portion 21 is a vertical pipe extending substantially in the vertical direction, and the bent pipe portion 23 is configured to convert the flow of the drainage 22 into a substantially horizontal direction. The upper end portion of the straight pipe portion 21 is connected to the outlet 59 of the toilet bowl 54 via a connection socket (see the connection socket 5 in FIG. 24), and an intermediate portion of the straight pipe portion 21 is an opening formed in the floor surface 53. (See the opening 6 in FIG. 24, such as a floor opening). Further, a lateral pipe (see straight pipe section 10 in FIG. 24) having a required drainage gradient and extending in the lateral direction is connected to the outlet portion (receiving port portion 34b) of the bent pipe portion 23.

(Configuration 1-8)
In addition to the above, the drainage device can be a wash basin 55, a bathtub 56, a kitchen sink 57, a washing machine 58, and the like. The drain pipe may be a wash pipe 65, a bath pipe 66, a kitchen pipe 67, a washing machine pipe 68, and the like.

(Supplementary explanation 1-8)
And in the case of a detached house, it has at least one of the straight pipe part 21 and the bent pipe part 23 as described above in the middle of the drainage pipe from each drainage device to being connected to the external drainage basin 69. can do.

  Similarly, in the case of an apartment house, at least one of the straight pipe portion 21 and the bent pipe portion 23 described above is provided in the middle of the drainage vertical pipe 71 installed so as to penetrate vertically between the respective floors from each drainage device described above. It is possible to have one.

  Furthermore, the straight pipe portion 21 described above may extend substantially in the horizontal direction, and the bent pipe portion 23 may change the direction of the flow of the drainage 22 in a substantially horizontal plane.

  Hereinafter, the piping member 34 for constructing the above-described piping structure will be described.

(Configuration 1-9)
As shown in any of FIGS. 4 to 9 (see, for example, FIG. 4), the pipe member 34 described above includes at least a part of the straight pipe portion 21 and the blocking prevention mechanism 24. It is said.

  In this case, an elbow member 35 having at least the bent pipe portion 23 may be installed at the outlet portion of the straight pipe member 36.

  The straight pipe member 36 and the elbow member 35 described above are configured as separate members.

(Supplementary explanation 1-9)
Here, the “elbow member 35” described above includes a part of the straight pipe portion 21 because the straight portion for connecting to the straight pipe member 36 is required to some extent at the inlet portion (exit port). Similarly, a certain amount of straight line is required for the part).

  Then, since the elbow member 35 includes a part of the straight pipe portion 21, the “straight pipe member 36” is the same as or slightly shorter than the straight pipe portion 21. That is, the bent pipe part 23 and the elbow member 35, and the straight pipe part 21 and the straight pipe member 36 are not exactly the same, but have slightly different lengths and ranges.

(Configuration 1-10)
And as shown in FIG. 5, the connection part 37 of the elbow member 35 used as another member and the straight pipe member 36 is comprised so that an outer peripheral surface may become flush (outer peripheral surface one connection part).

(Supplementary explanation 1-10)
Here, “the outer peripheral surface is flush” means that the outer diameter of the elbow member 35 and the straight pipe member 36 are substantially the same, and there is no uneven portion on the outer peripheral surface that hinders construction. say.

  For this purpose, for example, as shown in FIG. 5, the inner periphery of the connecting portion 37 between the elbow member 35 (the inlet portion) and the straight pipe member 36 (the outlet portion) can be fitted to each other (both fitting). The side step portion 37a and the outer peripheral step portion 37b are provided. In this case, the elbow member 35 side is an inner peripheral stepped portion 37a having a stepped portion on the inner peripheral side, and the straight pipe member 36 side is an outer peripheral stepped portion 37b having a stepped portion on the outer peripheral side. On the contrary, the elbow member 35 side may be the outer peripheral side stepped portion 37b, and the straight pipe member 36 side may be the inner peripheral side stepped portion 37a. Alternatively, as shown in FIG. 7 (a), an insertion convex edge portion 37c is provided on one inner peripheral portion of the connecting portion 37 so as to be fitted (single-fitted) to the other inner peripheral surface. You may make it do.

  And in order to form such an inner peripheral side step part 37a and an outer peripheral side step part 37b, or the insertion convex edge part 37c, at least the connection part 37 is configured to be slightly thicker than the other parts. It is preferable to do this. Therefore, for example, as shown in FIG. 5, the taper becomes thicker toward the downstream side with respect to the entire area (FIG. 5) or part (FIG. 7) of the inner peripheral surface of the straight pipe member 36 in the axial direction. It is also possible to form a cylindrical reduced-diameter portion 37d, or to form a constricted inwardly bulging portion 37e as shown in FIG. In order to prevent the resistance of the drainage 22 flowing through the inner bulging portion 37e from increasing, the bulging amount can be suppressed to about twice or less the wall thickness of the piping member 34, and the surface has a gently curved shape. Is preferable.

  The above-described “uneven shape portion that hinders construction” means, for example, an uneven shape portion having a size that does not pass through an existing opening (see, for example, opening 6 in FIG. 24) provided in the field. is there. On the other hand, a small concavo-convex shape portion or the like that does not interfere with the construction is allowed.

  In addition, as shown in FIG. 8, the elbow member 35 and the straight pipe member 36 are provided in the inlet part of the elbow member 35 by providing the receiving part 38 which can accommodate the exit part of the straight pipe member 36 as the connection part 37. As shown in FIG. It is structurally possible to make the outer diameter dimensions different from each other.

(Configuration 1-11)
As shown in FIG. 9, the straight pipe member 36 described above has a cutting margin 41 that can be cut for length adjustment on the upstream side of the portion of the minimum length 32 for connection where the blocking prevention mechanism 24 is provided. Like that.

(Supplementary explanation 1-11)
Here, the “cutting margin 41” is preferably about 1 to 2 times the minimum length 32 for connection. Of course, this cutting margin 41 can also be provided for the piping member 34 other than FIG. Note that the cutting margin 41 can be structurally longer than that of FIG. 9 or, conversely, shorter.

  In addition, a circumferential position determining unit 42 can be provided between the elbow member 35 and the straight pipe member 36. The circumferential position determination unit 42 includes, for example, a position determination convex part 42a that can be fitted and matched to each other and a position determination concave part (not shown). In this case, the straight pipe member 36 is provided with the position determining convex portion 42 a and the elbow member 35 is provided with the position determining concave portion. However, the straight pipe member 36 is provided with the position determining concave portion and is positioned on the elbow member 35. You may make it provide the convex part 42a for determination. The circumferential position determination unit 42 described above can be provided at one place or a plurality of places in the circumferential direction. In addition, it is needless to say that the circumferential position determining unit 42 described above can be provided for the piping member 34 other than that shown in FIG. In this way, by providing the circumferential position determining unit 42 between the elbow member 35 and the straight pipe member 36 which are separate members, the positional accuracy of the rectifying unit in the circumferential direction is increased, and the rectifying effect is maximized. It will be able to be demonstrated.

(Configuration 1-12)
Separately from the above, as shown in any of FIGS. 10 to 14, the piping member 34 is provided with a straight pipe integrated elbow member 43 integrally including the straight pipe portion 21 and the bent pipe portion 23. The above-described rectifying section (as the spiral blade 26) can be provided integrally or separately with respect to the tube-integrated elbow member 43. In this case, the spiral blade 26 is configured separately (separate rectifying member 44).

(Supplementary explanation 1-12)
Here, the straight pipe integrated elbow member 43 has, for example, a structure in which the straight pipe member 36 and the elbow member 35 of FIG. 4 or 7 are integrated. The straight pipe portion 21 has at least the minimum length 32 for connection described above. However, if the spiral blade 26 can be attached, the cutting margin 41 described above may be provided integrally with the straight pipe portion 21. In addition, the periphery of the boundary between the straight tube portion 21 and the bent tube portion 23 is flush with the outer peripheral surface. Note that, for convenience of the drawings, the configurations in which the reference numerals are omitted are the same as those in FIGS.

  The separate rectifying member 44 includes the above-described spiral blade 26 as a rectifying unit of the blocking prevention mechanism 24, and the spiral blade 26 is connected to the straight tube integrated elbow member 43 (the straight tube portion 21 thereof). The mounting portion 45 for mounting is integrally provided. In contrast, the straight pipe integrated elbow member 43 is provided with a portion 46 to be attached to the attachment portion 45 as necessary. The attaching portion 45 and the attached portion 46 are fixed by adhesion or the like.

(Configuration 1-13)
More specifically, for example, in FIG. 10, the attachment portion 45 is a plug-in attachment portion 45 a formed integrally with the outer peripheral center portion of the spiral blade 26. And the to-be-attached part 46 is made into the hole 46a for attachment formed in the installation position of the spiral blade 26 in the straight pipe integrated elbow member 43 (the surrounding wall surface of the straight pipe part 21). The plug-in attachment portion 45 a and the attachment hole 46 a are elongated and extend in the circumferential direction of the straight pipe portion 21. According to such a configuration, the separate rectifying member 44 can be attached to the straight pipe portion 21 without any trouble.

(Configuration 1-14)
Further, for example, in FIG. 11, the attachment portion 45 is an annular attachment portion 45 b that can be fixed in contact with the end surface of the inlet portion of the straight pipe-integrated elbow member 43, and the annular attachment portion 45 b is a straight pipe. The integrated elbow member 43 is connected to the spiral blade 26 by an extended support portion 45c that extends to the installation position of the spiral blade 26 (downward in the drawing) along the inner surface (the front semicircular wall portion 21b of the straight pipe portion 21). . In this case, the annular mounting portion 45 b has substantially the same inner and outer diameter as the inlet portion of the straight pipe integrated elbow member 43. The extended support portion 45 c has a crescent-shaped cross section that does not cause a large step between the inner surface of the straight pipe integrated elbow member 43. Although not shown in particular, an accommodation groove portion is provided as an attached portion (46) on the inner surface of the straight pipe-integrated elbow member 43, and the above-mentioned extended support portion 45c is placed in the accommodation groove portion with the same inner peripheral surface. You may accommodate so that it may become. According to such a configuration, the separate rectifying member 44 can be attached to the straight pipe portion 21 without any trouble.

  In addition, for example, in FIG. 12, the attachment portion 45 is abutted against the outlet portion of the piping member 34 (straight tube integrated elbow member 43) or the pipe stop surface 34c of the receiving portion 34b provided at the outlet portion. An annular mounting portion 45d that can be housed and fixed in a contact-locked state is formed, and the annular mounting portion 45d is bent to the installation position of the spiral blade 26 along the inner surface (small curved portion 23b) of the straight pipe integrated elbow member 43 ( It is connected to the spiral blade 26 by an extended support portion 45e extending in the lateral direction and upward direction in the figure. In this case, the annular mounting portion 45d has an outer diameter that is substantially the same as the inner diameter of the receiving portion 34b. The extended support portion 45e has a crescent-shaped cross section that does not cause a step between the inner surface of the straight pipe integrated elbow member 43. In addition, although not particularly illustrated, an accommodation groove portion is provided as an attached portion (46) on the inner surface of the straight pipe integrated elbow member 43, and the above-described extended support portion 45e is placed in the accommodation groove portion so that the inner peripheral surface is in the same state. You may accommodate so that it may become. Further, the annular mounting portion 45d may be provided with a notch portion 45f that divides the annular mounting portion 45d in the circumferential direction so as to be easily deformed according to the necessity for installation. According to such a configuration, the separate rectifying member 44 can be attached to the straight pipe portion 21 without any trouble.

(Configuration 1-15)
Further, for example, in FIG. 13, the attachment portion 45 is inserted from the inlet portion of the straight pipe integrated elbow member 43 and constitutes at least a part of the upstream portion of the spiral blade 26 of the front semicircular wall portion 21 b. The partial cylindrical surface-shaped semi-peripheral wall-shaped mounting portion 45g (peripheral wall-shaped mounting portion). And the to-be-attached part 46 is formed in the internal peripheral surface of the straight pipe integrated elbow member 43, and is made into the accommodation recessed part 46g which can accommodate the half-circumferential wall-shaped attachment part 45g in the inner peripheral surface one state. According to such a configuration, the separate rectifying member 44 can be attached to the straight pipe portion 21 without any trouble.

  Further, for example, in FIG. 14, the attachment portion 45 is inserted from the inlet portion of the straight pipe integrated elbow member 43, and forms a cylindrical entire peripheral wall constituting a portion downstream of the spiral blade 26 of the straight pipe portion 21. 45h (peripheral wall-shaped mounting portion). The entire circumferential wall-shaped mounting portion 45h may be provided with a cut portion 45i that extends in the axial direction and divides the entire circumferential wall-shaped mounting portion 45h in the circumferential direction so as to be easily deformed according to the necessity for installation. good. The attached portion (46) may be the inner surface of the straight tube integrated elbow member 43, but the inner peripheral wall mounting portion 45h is formed on the inner surface of the straight tube integrated elbow member 43 as in FIG. You may make it form the accommodation recessed part which can be accommodated in the surrounding surface one state. In this case, since the insertion position of the all-around wall-shaped attachment portion 45h is restricted by the bent tube portion 23, the entire peripheral wall-like attachment portion 45h is stopped at the optimum position without providing a stopping member such as a stopper. . However, it goes without saying that a stopper may be provided. According to such a configuration, the separate rectifying member 44 can be attached to the straight pipe portion 21 without any trouble.

(Configuration 1-16)
Further, a position determining unit (circumferential position determining unit 42) with respect to the circumferential direction is provided between the mounting unit 45 and the mounted unit 46 described above. However, since the attachment portion 45 and the attachment portion 46 may themselves have a function as the circumferential position determination portion 42 (for example, FIGS. 10, 12, and 13), in this case, in particular, There is no need to provide a dedicated circumferential position determination unit 42.

  For example, in FIG. 11, fittings that can be fitted and matched to each other (adhesive surface) between the annular mounting part 45 b as the mounting part 45 and the inlet part of the straight pipe integrated elbow member 43 as the mounted part 46. A circumferential position determining unit 42 including a mating convex portion 42c and a fitting concave portion 42d is provided. It should be noted that the fitting convex portion 42c and the fitting concave portion 42d may be provided with concavities and convexities in reverse. Further, the fitting convex portion 42c and the fitting concave portion 42d may be provided on the one shown in FIG.

  Thus, by providing the circumferential position determining unit 42 between the straightening member (separate straightening member 44) and the straight pipe member 36 (straight pipe integrated elbow member 43) which are separate members, the circumferential direction is determined. The position accuracy of the rectification unit can be increased and the rectification effect can be maximized.

(Configuration 1-17)
Here, the pipe structure having the straight pipe portion 21 and the bent pipe portion 23 as described above can be applied to a pipe structure having only the straight pipe portion 21 not having the bent pipe portion 23. is there.

  That is, the above-described piping structure provided with the blocking prevention mechanism 24 may be applied to the straight portion of the drainage piping. For example, the above-described blockage prevention mechanism 24 is provided at the central portion of the straight line portion of the drainage pipe, or the above-described blockage prevention mechanism 24 is provided at the straight line portion of the drainage pipe (with a certain interval or a required interval). Can be provided in multiple places. The straight part of the drainage pipe is preferably one that extends substantially vertically (vertical pipe), but depending on the situation, it may be one that extends substantially horizontally (horizontal pipe). When the straight part of the drain pipe is a horizontal pipe, the rectifying unit is provided on the upper part of the horizontal pipe.

  More specifically, a straight pipe member (not shown) similar to the straight pipe member 36 of FIGS. 4 to 9 described above is provided, and a spiral blade 26 as a rectifying unit is integrated inside the straight pipe member. It is also possible to provide it. Note that the configuration of the spiral blade 26 can be the same as described above.

  Further, a straight pipe member (not shown) similar to the straight pipe portion 21 of the straight pipe integrated elbow member 43 shown in FIGS. 10 to 14 is provided, and a straightening member is provided inside the straight pipe member. The separate rectifying member 44 including the spiral blade 26 can be configured to be attachable. The configuration of the attached rectifying member 44 is the same as that described above.

  <Operation> The operation of this embodiment will be described below.

  In the drainage system for a detached house as shown in FIGS. 1 and 2, the drainage 22 from each drainage device such as the toilet bowl 54, the washstand 55, the bathtub 56, and the kitchen basin 57, is a toilet pipe 64 and a washroom respectively. After being merged individually or by the drainage header 70 via drainage pipes such as the pipe 65, the bath pipe 66, and the kitchen pipe 67, it flows down to a drainage basin 69 provided outside the foundation 51. .

  Similarly, in the collective housing drainage system as shown in FIG. 3, the drainage 22 from each drainage device such as the toilet bowl 54, the washstand 55, the bathtub 56, and the kitchen basin 57, respectively, is a toilet pipe 64 and a washpipe. 65, it flows down to a drainage vertical pipe 71 provided in a common space of the building through drainage pipes such as a bath pipe 66 and a kitchen pipe 67.

  In such a drainage pipe, for example, in the bent portion A in FIGS. 1 and 3, the drainage 22 that has flowed through the straight pipe portion 21 is changed in direction by the bent pipe portion 23 and flows down. .

  At this time, by providing the straight pipe portion 21 with the blocking prevention mechanism 24, the outlet portion of the bent pipe portion 23 is partially blocked by the drainage 22 to prevent the occurrence of negative pressure in the straight pipe portion 21. Is done.

  In this case, the drainage 22 that has flowed along the front semicircular wall portion 21b of the straight pipe portion 21 is caused by the rectifying portion of the blocking prevention mechanism 24 provided in the vicinity of the connection portion 37 of the straight pipe portion 21 with the bent pipe portion 23. The course is changed on the way, and the direction is smoothly changed along the large curved portion 23a by being guided toward the large curved portion 23a of the bent pipe portion 23.

  Accordingly, the drainage 22 that has flowed along the semicircular wall portion 21b on the front side of the straight pipe portion 21 reaches the small bend portion 23b of the bend tube portion 23 as it is and cannot bend the small bend portion 23b. The outlet portion of the bent pipe portion 23 is partially blocked by the drainage 22 (partially by staying around the outlet portion or partially backflowing (bounce back) along the large curved portion 23a). Prevents the occurrence of problems such as a full pipe condition, or the outlet of the bent pipe part 23 being blocked with a water film, and the passage of air being lost, causing negative pressure in the straight pipe part 21 Is done.

  Here, what is the occlusion prevention mechanism 24 in order to reliably perform the above-described action, to surely prevent generation of negative pressure inside the drainage pipe, and to improve drainage performance (conveyance performance)? Becomes extremely important. Therefore, it is necessary to review the structure of the blocking prevention mechanism 24 in detail and make it highly sophisticated.

  In this embodiment, in order to obtain a highly functional piping structure that can be installed in a narrower space and can obtain higher drainage performance (conveyance performance), the blocking prevention mechanism 24 is configured as follows. Yes.

  <Effect> According to this embodiment, the following effects can be obtained.

(Effect 1)
By providing the blocking prevention mechanism 24 in the middle of the drainage pipe connecting the drainage device and the drainage tub 69 or the drainage vertical pipe 71, it is possible to make it difficult for negative pressure to be generated inside the drainage pipe. In particular, by providing the above-described blockage prevention mechanism 24 in the bent portion A of the drainage pipe in the vicinity of the connection portion between the straight pipe portion 21 and the bent pipe portion 23, the blockage prevention mechanism 24 is made the place where the negative pressure is most easily generated. It can be arranged efficiently.

  And by making the blockade prevention mechanism 24 into the rectification | straightening part which arranges the flow of the waste_water | drain 22, the waste_water | drain 22 which flowed along the semicircular wall part 21b of the front side of the straight pipe | tube part 21 is large-sized easily in a narrow space. Since the direction can be changed to the flow (swirl flow) toward the portion 23a (the bending start portion 25), the flow is guided to the large bending portion 23a of the bending tube portion 23 most efficiently and smoothly without greatly disturbing the flow. It becomes possible. Therefore, the straight pipe part 21 can be significantly shortened, and when the straight pipe part 21 is provided in the underfloor space 52, the depth of the floor can be compressed.

  In addition, the rectifying part of the blocking prevention mechanism 24 is a spiral blade 26 extending along the inner wall of the straight pipe part 21 so as to constitute at least a part of the spiral, so that the half peripheral wall part 21b on the front side of the straight pipe part 21 Since the drainage 22 that has flown along the line becomes a swirling flow toward the large bend portion 23a (the bending start portion 25), a necessary air core (air passage) is secured at the center of the swirling flow. It is also possible to prevent a negative pressure from being generated in the portion 21 due to the loss of the air passage.

  Accordingly, it is possible to realize a highly functional piping structure that can be installed in a narrower space and can obtain higher drainage performance (conveyance performance).

  Further, the rectifying portion of the blocking prevention mechanism 24 is a spiral blade 26 that can be adjusted so that the flow of the drainage 22 is directed toward the bending start portion 25 of the large bending portion 23a of the bending pipe portion 23, thereby pinching the bending start portion 25. Aiming at the point, the flow of the drainage 22 can be guided to the bending start portion 25 with high accuracy. Therefore, the straight pipe portion 21 can be shortened to the maximum.

(Effect 2)
Further, the spiral blade 26 serving as the rectifying unit of the blocking prevention mechanism 24 secures the minimum required passage portion 27 having a circular cross section that is the minimum necessary for flowing the drainage 22 to the semicircular wall portion 21a on the rear side of the straight pipe portion 21. By providing the remaining portion, it is necessary to secure the flow of the drainage 22 in the portion near the rear half wall portion 21a and to direct the drainage 22 toward the large curved portion 23a of the bent pipe portion 23. The passage portion 27 can be secured, and the spiral blade 26 can be prevented from being clogged in the straight pipe portion 21 by preventing the spiral blade 26 from being present in the minimum necessary passage portion 27.

  The drainage 22 guided by the spiral blades 26 flows toward the bending start portion 25 of the large curved portion 23a of the bending tube portion 23 so as to substantially follow the extension locus of the spiral blades 26 due to inertia. Even if a part of the blade 26 is missing in the rear half wall portion 21a, there is no particular problem.

(Effect 3)
And the spiral blade 26 as a rectification | straightening part of the obstruction | occlusion prevention mechanism 24 does not protrude from the semicircular wall part 21a on the rear side beyond the semicircular wall part 21b on the front side. With respect to the drainage 22 that has flowed along the half-circumferential wall portion 21a, it is possible to flow directly toward the large curved portion 23a of the bent tube portion 23 without hindering the flow.

  On the other hand, the drainage 22 that has flowed along the front-side half-circumferential wall portion 21 b can be changed in direction substantially toward the large curved portion 23 a of the bent tube portion 23 by the spiral blade 26. Thereby, it becomes possible to optimize the installation range with respect to the circumferential direction of the spiral blade 26 so that the rectification effect can be obtained to the maximum.

(Effect 4)
Further, the spiral blade 26 as the rectifying part of the blocking prevention mechanism 24 has an attachment angle 31 that is inclined toward the downstream side of the flow of the drainage 22 with respect to the direction perpendicular to the tube axis on the inner surface of the straight pipe part 21. When the direction of the drainage 22 flowing along the front half-circumferential wall portion 21b is changed toward the large bend portion 23a, the resistance given to the drainage 22 by the spiral blade 26 is reduced, and noise is generated. In addition, the drainage 22 and the solid matter contained in the drainage 22 can be prevented from accumulating at the corner portion between the upstream surface of the spiral blade 26 and the inner surface of the straight pipe portion 21. .

(Effect 5)
Then, by installing the blocking prevention mechanism 24 within the range of the minimum connection length 32, the blocking prevention mechanism 24 is prevented from interfering with the drainage device connected to the upstream side of the straight pipe portion 21. Can do. Accordingly, it is possible to eliminate the problem that the blocking prevention mechanism 24 cannot be installed in the drainage pipe, and to reliably improve the function of the drainage pipe.

(Effect 6)
Further, the drainage device provided on the upstream side of the straight pipe portion 21 is a toilet 54 installed on the floor surface 53, and the straight pipe portion 21 and the bent pipe portion 23 are connected to the outlet 59 of the toilet 54. The toilet pipe 64 that extends through the floor 53 to the underfloor space 52 and is diverted laterally along the underfloor space 52 causes a large amount of sewage to flow at a stroke (maximum instantaneous flow rate). Is connected to a recent water-saving toilet bowl 54 that is configured to be large), and is disposed in the underfloor space 52 of a recent residential house that is becoming more narrow, thereby generating negative pressure inside. Even in drainage pipes under harsh conditions that are easy to prevent, it is possible to effectively prevent the generation of negative pressure and reliably suppress the decrease in the sealing water of the toilet 54 due to the so-called self-siphon phenomenon. Become.

(Effect 7)
Further, the drainage device provided on the upstream side of the straight pipe part is at least one of the wash basin 55, the bathtub 56, the kitchen stool 57, and the washing machine 58, and the straight pipe part 21 and the bent pipe part 23 are used for the wash face. By configuring at least one of the pipe 65, the bath pipe 66, the kitchen pipe 67, and the washing machine pipe 68, the same effect as described above can be obtained.

(Effect 8)
Further, by providing a straight pipe member 36 having the blockage prevention mechanism 24 integrally or separately in at least a part of the straight pipe portion 21, a drain pipe that is unlikely to generate negative pressure due to partial blockage can be easily and reliably formed. It becomes possible to build in.

  Then, by providing the elbow member 35 (having at least the bent pipe portion 23) at the outlet portion of the straight pipe member 36, the bent portion A, which is one of the places where the most partial blockage is likely to occur, can be easily and It is possible to reliably prevent the blockage. Therefore, it is possible to easily enhance the function of the drain pipe.

  Furthermore, by configuring the straight pipe member 36 and the elbow member 35 as separate members, the shapes of the elbow member 35 and the straight pipe member 36 can be simplified, thereby improving productivity and reducing manufacturing costs. Can be lowered.

  Moreover, the performance improvement of existing piping can be aimed at by attaching the said elbow member 35 and the straight pipe member 36 with respect to existing piping.

(Effect 9)
Further, since the outer peripheral surface of the connecting portion 37 between the elbow member 35 and the straight pipe member 36 is configured to be flush with the existing opening (floor opening or the like) provided at the site, it is easy. Since it can be installed through the elbow member 35 and the straight pipe member 36, the workability can be improved.

  In terms of structure, as shown in FIG. 8, the elbow member 35 and the straight pipe member 36 are provided at the inlet part of the elbow member 35 by providing a receiving part 34 b that can accommodate the outlet part of the straight pipe member 36. It is also possible to make the outer diameter dimensions different from each other. In this case, it can be used without problems by expanding an existing opening (floor opening or the like) provided at the site as needed.

(Effect 10)
Further, the straight pipe member 36 described above has a cutting margin 41 that can be cut for adjusting the length on the upstream side of the portion of the minimum connecting length 32 where the blocking prevention mechanism 24 is provided. By cutting and using the cutting margin 41 according to the situation, a single type of straight pipe member 36 can be used widely.

(Effect 11)
In addition, since the separate straightening member 44 having the blocking prevention mechanism 24 can be attached to the straight pipe integrated elbow member 43 integrally including the bent pipe portion 23 and the straight pipe portion 21, Since the shape and structure of the rectifying member 44 can be simplified, productivity can be improved and the manufacturing cost can be reduced.

  FIG. 15 shows the second embodiment.

(Constitution)
In this embodiment, the straightening portion 81 is used as the straightening portion (rectifying member) of the blocking prevention mechanism 24 described above. The jump plate 81 extends along the inner wall near the boundary between the straight pipe portion 21 and the bent pipe portion 23 so as to extend in the circumferential direction. The jump plate 81 can change the direction of the drainage 22 flowing along the front half circumferential wall portion 21 b of the straight pipe portion 21 toward the large bend portion 23 a of the bent pipe portion 23.

  More preferably, the jump plate 81 can change the direction of the flow of the drainage 22 so as to go to the bending start portion 25 of the large bending portion 23a of the bending tube portion 23.

(Supplementary explanation)
Here, the above-described jump plate 81 is configured such that the drainage 22 is directed toward the large curved portion 23 a of the bent tube portion 23 by the attachment angle 31 with respect to the inner surface of the straight tube portion 21.

  The jump plate 81 has a non-spiral shape that extends in the circumferential direction of the straight pipe portion 21 (substantially horizontally without a gradient angle (turning angle)). FIG. 3 or FIG. 4 (b)).

  In addition, this Example can employ | adopt all the same structures as above-mentioned Example 1 except not having a helical shape.

(effect)
As described above, since the flow straightening portion of the blocking prevention mechanism 24 is the jump plate 81, the flow of the drainage 22 can be directed to the bending start portion 25 of the large bend portion 23a with a simple structure. It is possible to effectively prevent the inside of the pipe, in particular, the outlet portion of the bent pipe portion 23 from being partially blocked by the drainage 22 and generating negative pressure in the straight pipe portion 21.

  In addition, about the structure, operation | movement, and effect which abbreviate | omitted description, it can be set as description of this Example 2 by description of the said Example 1. FIG.

  FIG. 16 shows a modification of the second embodiment.

(Constitution)
In this modification, the jump plate 81a serving as the rectifying unit of the blockage preventing mechanism 24 is substantially in plan view connecting between both ends in the circumferential direction of the half circumferential wall portion 21b on the front side of the straight tube portion 21 and the intermediate portion. A V-shaped tip edge portion 81b is provided. Or it is set as the two-piece jump board 81a which has the magnitude | size for 1/4 circumference | surroundings installed in the front half wall part 21b.

  In addition, this modification can also employ the same configuration as that of the first embodiment described above except that it is not a spiral shape.

(effect)
As described above, even if the jump plate 81a is divided into two pieces, substantially the same operational effects as in the case of FIG. 15 can be obtained. Further, since the jump plate 81a has a projected area viewed from above smaller than the projected area of the swirl vane of the first embodiment and the jump plate 81 of the second embodiment, it is easier to secure an air core (air passage). Can be.

  In addition, about the structure, operation | movement, and effect which abbreviate | omitted description, it can be set as description of this modification by description of the said Example 1 and Example 2. FIG.

  FIGS. 17A and 17B show the third embodiment.

(Constitution)
In this embodiment, the blocking prevention mechanism 24 is an air intake portion. This air intake portion is provided on the outer peripheral portion of the drainage inner pipe portion 87 connectable to the straight pipe portion 21 (the straight pipe member 36 constituting the straight pipe portion 21), and has a larger diameter than the drainage inner pipe portion 87. An eccentric double tube 88 is formed by arranging the portions 86 in an eccentric state.

  The drain inner pipe portion 87 and the vent outer pipe portion 86 are integrally formed. The drain inner pipe part 87 is eccentrically arranged inside the vent outer pipe part 86 toward the large bend part 23a.

  A large-diameter mouth portion 85 having a diameter larger than that of the straight tube portion 21 is formed at the inlet portion of the bent tube portion 23 described above. The large-diameter mouth portion 85 can be connected to the outlet portion of the ventilation outer tube portion 86.

(Supplementary explanation)
Here, the above-described large-diameter mouth portion 85 is provided at the inlet portion of the elbow member 35 constituting the bent tube portion 23. The large-diameter mouth portion 85 is a receiving portion that can be fixed by bonding or the like in a state where the eccentric double tube 88 is fitted.

  It is preferable that the large-diameter opening portion 85 has a diameter that is about 5% to 20% larger than that of the straight pipe portion 21. Here, the reason why it is set to 5% or more is that if it becomes smaller than this, it is difficult to obtain a sufficient effect (preventing negative pressure generation). Further, if the ratio is set to 20% or less, if it is larger than this, the elbow member 35 constituting the bent tube portion 23 becomes too large, which may cause a problem in installation. In this case, the large-diameter mouth portion 85 is about 10% larger than the straight pipe portion 21.

  In addition, the above-described large-diameter opening portion 85 can be provided to the inlet portion of a straight pipe member (not shown). That is, a straight pipe member having a large diameter opening 85 can be connected to the outlet of the eccentric double pipe 88.

  Alternatively, instead of providing the large-diameter opening 85 in the elbow member 35 or the straight pipe member on the downstream side, the drainage inner pipe part 87 communicates with the ventilation space 88a formed between the ventilation outer pipe part 86. A communication hole may be formed.

  And as mentioned above, by making the entrance part of the bending pipe part 23 into the large diameter opening part 85, the large bend part 23a is made to have a larger and smooth curve shape by the amount of the enlarged diameter (enlargement). Omagari)

  Further, the above-described eccentric double pipe 88 is provided such that the drainage inner pipe part 87 is inscribed in the middle part in the circumferential direction on the large curved part 23a side of the ventilation outer pipe part 86 (FIG. 17). (See (a)).

  On the other hand, the connection of the straight pipe part 21 (the straight pipe member 36 constituting the straight pipe part 21) to the inlet part of the drain inner pipe part 87 may be the same as the connection part 37 (one connection part on the outer peripheral surface, etc.) described above. it can. Alternatively, the straight pipe portion 21 (the straight pipe member 36 constituting the straight pipe portion 21) can be inserted and fixed inside the drainage inner pipe portion 87. In this case, an inner flange portion 87a for stopping the pipe is formed in the outlet portion of the inner pipe portion 87 for drainage.

  In the eccentric double pipe 88, as described above, the ventilation space 88 a is formed between the drain inner pipe part 87 and the ventilation outer pipe part 86 so as to be located on the small curved part 23 b side. The ventilation space 88a has a crescent shape in plan view. In the plan view crescent moon-shaped ventilation space 88a, the upper and lower ends can be left open as they are, but in order to prevent leakage or scattering of the drainage 22 from the ventilation space 88a to the outside, it is necessary. Although not particularly illustrated, for example, at least one of the upper and lower end portions may be closed with a lid portion, and a single or a large number of air holes or the like may be appropriately provided in the lid portion. The lid portion can be formed integrally with the eccentric double tube 88 or can be separate from the eccentric double tube 88.

  Alternatively, as shown in the modified examples of FIGS. 18A and 18B, an external air intake pipe 89 capable of supplying and discharging air from the outside can be connected to the ventilation space 88a instead of providing a ventilation hole. A simple connection port 88b may be provided. In this case, the connection port 88b is provided integrally with the lid portion described above. The external air intake pipe 89 may be a hard pipe or a flexible pipe.

  In addition, this Example can employ | adopt the same structure as above-mentioned Example 1 except that the obstruction | occlusion prevention mechanism 24 is not a rectification | straightening part.

(effect)
Since the eccentric double pipe 88 has a vent space 88a formed between the drain inner pipe portion 87 and the vent outer pipe portion 86, the bent pipe portion 23 and the vent pipe 88 are formed from the vent space 88a. When air enters and exits the inside of a straight pipe member (not shown), blockage of the bent pipe portion 23 and the straight pipe member (not shown) due to the drainage 22 is prevented.

  In addition, in the case of the bent pipe portion 23, air can be taken into the periphery of the small bend portion 23b by positioning the ventilation space 88a on the small bend portion 23b side. Can be further enhanced.

  Further, when a large-diameter opening 85 having a diameter larger than that of the straight pipe part 21 is formed at the bent pipe part 23 or the inlet part of the straight pipe member (not shown), the downstream side bent pipe part 23 or a straight pipe (not shown) is formed. Since the capacity of the pipe member can be increased, even when the instantaneous maximum flow rate of the drainage 22 is large, the bent pipe portion 23 can pass the drainage 22 with a margin.

  In addition, the drainage inner pipe part 87 constituting the eccentric double pipe 88 is eccentrically arranged inside the ventilation outer pipe part 86 toward the large curve part 23a, so that the drainage 22 is arranged along the large curve part 23a. Since it is possible to flow smoothly, it is possible to prevent the drainage 22 from staying or splashing at the outlet of the bent pipe portion 23. In addition, since the large curved portion 23a has a larger and gentle curved shape corresponding to the entrance portion of the bent pipe portion 23 being the large diameter mouth portion 85 (enlarged large curved portion), the drainage 22 can be guided more smoothly. it can.

  In addition, about the structure, effect | action, and effect which abbreviate | omitted description, it can be set as description of this Example 3 by description of the said Example 1 and Example 2. FIG. At this time, the rectification unit is replaced with the air intake unit, and the spiral blade 26 and the jump plates 81 and 81a are replaced with the eccentric double tube 88 as necessary.

(Constitution)
In each of the above-described embodiments, the rectification unit and the air intake unit as the blockage prevention mechanism 24 are used alone, whereas in this example, the rectification unit and the air intake unit are combined. I try to have both functions.

  For example, in FIGS. 19 (a) and 19 (b) and FIGS. 20 (a) and 20 (b), a spiral as a rectifying unit is provided for a drainage inner tube 87 of an eccentric double tube 88 as an air intake unit. The blades 26 and the jump plates 81, 81a are directly provided.

  Further, for example, in FIGS. 21A and 21B and FIGS. 22A and 22B, a rectifying unit is provided for the drainage inner pipe part 87 of the eccentric double pipe 88 as an air intake part. The straight pipe member 36 having the spiral blades 26 and the jump plates 81, 81a is attached.

  In addition, this Example can employ | adopt all the same structures as each above-mentioned Example.

(effect)
As described above, by combining the rectifying unit and the air intake unit, the same effect as described above can be obtained, and the blocking prevention effect can be further enhanced. In addition, depending on the combination of the rectifying unit and the air intake unit, a greater effect than when used alone may occur.

  Moreover, in buildings and the like, a plurality of the above-described drainage devices are usually provided and drainage pipes are connected to each drainage device, but at least one of the drainage pipes is at least one of them. One or more blocking prevention mechanisms 24 are installed. And in the drainage piping in which the blocking prevention mechanism 24 was installed, the blocking prevention mechanism 24 installed by each drainage piping can be varied.

  By doing in this way, it becomes possible to select and use the optimal blocking prevention mechanism 24 according to the type of drainage equipment, the installation location and installation situation of the drainage pipe, and the building drainage system as a whole. Can be more optimal.

  In addition, about the structure, effect | action, and effect which abbreviate | omitted description, it can be set as description of this Example by description of each said Example.

  Although the embodiments of the present invention have been described in detail with reference to the drawings, the embodiments are only examples of the present invention, and the present invention is not limited to the configurations of the embodiments. Needless to say, design changes and the like within a range not departing from the gist of the invention are included in the present invention. Further, for example, when each embodiment includes a plurality of configurations, it is a matter of course that possible combinations of these configurations are included even if not specifically described. Further, when a plurality of embodiments and modifications are shown, it is needless to say that possible combinations of configurations extending over these are included even if not specifically described. Further, the configuration depicted in the drawings is of course included even if not particularly described. Further, when there is a term of “etc.”, it is used in the sense that the equivalent is included. In addition, when there are terms such as “almost”, “about”, “degree”, etc., they are used in the sense that they include those in the range and accuracy recognized by common sense.

21a Half wall part 21b Half wall part 22 Drainage 23a Large curve part 24 Blocking prevention mechanism 25 Bending start part 26 Spiral blade (rectifying part)
27 Minimum Required Passage 31 Mounting Angle 32 Minimum Length for Connection 36 Straight Pipe Member 37 Connection 52 Space Below Floor 53 Floor 54 Toilet 55 Wash Basin 56 Bathtub 57 Kitchen Float 58 Washing Machine 59 Drain 64 Toilet Piping (Drainage) Plumbing)
65 Washing piping (drainage piping)
66 Bath piping (drainage piping)
67 Kitchen piping (drainage piping)
68 Pipes for washing machines (drainage pipes)
69 Drainage 71 Drainage vertical pipe 81 Jump plate (rectifier)
81a Jumping plate (rectifying part)
86 Outer pipe part for ventilation 87 Inner pipe part for drainage 88 Eccentric double pipe 88a Venting space 88b Connection port 89 External air intake pipe A Bent part

Claims (13)

  Blockage prevention that prevents negative pressure from being generated upstream of the blocked part by partially blocking the interior with drainage between the drainage device and the drainage pipe or drainage vertical pipe A drainage system characterized by connecting drainage piping with a mechanism. The blockage prevention mechanism is capable of preventing partial blockage of the drainage pipe by adjusting the flow of drainage inside the drainage pipe; and
The drainage system according to claim 1, further comprising at least one of an air intake part capable of preventing partial blockage of the drainage pipe by taking air into the drainage pipe.   The drainage system according to claim 2, wherein the rectifying unit is a spiral blade extending so as to constitute at least a part of a spiral along an inner wall of the drainage pipe.   The drainage system according to claim 2, wherein the rectifying unit is a jump plate protruding from an inner wall of the drainage pipe. The rectifying part is provided in the remaining part secured in a state where the minimum necessary passage part of the minimum circular section necessary for flowing drainage into the drainage pipe is shifted to one side,
The rectifying portion is provided in a half-periphery wall portion opposite to a half-periphery wall portion on the side where the minimum required passage portion is set;
The drainage system according to any one of claims 2 to 4, wherein the rectifying unit is provided with an attachment angle inclined toward a downstream side of a drainage flow.   The air intake part is integrally provided on the outer periphery of the inner pipe part for drainage with the inner pipe part for drainage and the inner pipe part for drainage being eccentric with respect to the inner pipe part for drainage. The drainage system according to claim 2, wherein the drainage system is an eccentric double pipe having a ventilation outer pipe part that forms a ventilation space between the inner pipe part and the inner pipe part.   The said blockage prevention mechanism is installed in the range of the minimum length for connection required at least for the connection of the drainage piping to the said drainage apparatus, The any one of Claim 1 thru | or 6 characterized by the above-mentioned. The drainage system according to item.   The drainage system according to any one of claims 1 to 7, wherein the blocking prevention mechanism is installed on an entry side of a bent portion provided in a drainage pipe.   The drainage system according to claim 8, wherein the rectifying unit guides drainage toward a bending start portion of a large bent portion of the bent portion. The drainage device is a toilet installed on the floor surface,
The drainage pipe is a toilet pipe that is connected to an outlet of the toilet, extends through the floor surface to the underfloor space, and is further changed in the lateral direction along the underfloor space. The drainage system according to any one of claims 1 to 9. The drainage device is at least one of a wash basin, a bathtub, a kitchen sink, and a washing machine;
The drainage according to any one of claims 1 to 9, wherein the drainage pipe is at least one of a wash pipe, a bath pipe, a kitchen pipe, and a washing machine pipe. system.   A plurality of the drainage devices are provided, drainage pipes are connected to each drainage device, and at least one of the blocking prevention mechanisms is installed for at least two of the drainage pipes. The drainage system according to any one of claims 1 to 11, wherein the installed blocking prevention mechanism is different. The blockage prevention mechanism is capable of preventing partial blockage of the drainage pipe by adjusting the flow of drainage inside the drainage pipe; and
13. The air intake portion according to claim 1, further comprising an air intake portion capable of preventing partial blockage of the drain pipe by taking air into the drain pipe. The described drainage system.