JP2005146581A - Rainwater splash preventing device in drain device for junction - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rainwater splash preventing device reducible in manufacturing cost while having excellent workability and large draining ability in a drain device for a junction. <P>SOLUTION: A guide inclined conical surface 22 with its upper end formed as a lead-in port 21a with a diameter larger than the outer diameter of a leader pipe 8 and with its lower end formed as a lead-out port 21b with a diameter smaller than or almost equal to the upper opening diameter of a drain pipe part 3, is integrally formed inside a strainer 20A. The stainer 20A is mounted in the state of the lead-in port 21a concentrically facing the lower part position of the leader pipe 8, and the lower part of the lead-out port 21b concentrically facing the drain pipe part 3 to form a required flow clearance (s) communicating with the outside, between the opening edge of the drain pipe part 3 and the lower part of the lead-out port 21b. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  In the present invention, when rainwater is discharged into a lower-level strainer from a vertical pipe that is passed up and down between relay drains attached to the floors of each floor, the splashes are prevented from scattering to the outside. The present invention relates to a rainwater splash prevention device for a relay drain device.

  In general, in the drain device for relay, as shown in FIG. 7, the drain pipe portion 3 inserted into the floor A such as a balcony of each floor has water flowing on the outer periphery thereof on the drain tray 2 coupled downward. A relay drain 1 formed by fixing a truncated conical cylindrical strainer 5 in which a large number of holes 4 are formed is disposed at a position where the floor A coincides with each other on the floor A, and the long vertical pipe 8 is provided. The upper end is fitted to the drain pipe portion 3 of the drain tray 2 on the upper floor side, and the lower end is held by the support piece 9 (see FIG. 8) while being inserted into the strainer 5 of the relay drain 1 on the lower floor side. Thus, the vertical pipe 8 is vertically passed between the relay drains 1 and 1 on each floor. The rainwater flowing from the strainer 5 of the relay drain 1 on the upper floor is sequentially flowed to the relay drain 1 on the lower floor through the vertical pipe 8.

  By the way, in the configuration of the relay drain device as described above, when rainwater is discharged from the vertical pipe 8 into the strainer 5 on the lower floor, the drain pipe portion 3 formed in the lower drain tray 2. Since the upper opening diameter is smaller than that of the vertical pipe 8, a part of the falling rainwater hits the opening periphery of the drain pipe part 3, and the splashes go to the outside from the water passage hole 4 formed in the strainer 5. There is a problem of scattering.

  Therefore, as shown in FIG. 8, the upper end is provided with an inlet 14a having a diameter larger than the outer diameter of the vertical pipe 8 and the outlet 14b having a diameter smaller than the upper opening diameter of the drain pipe portion 3 is provided at the lower end. The guide pipe 13 is formed such that the introduction port 14a faces the lower position of the vertical pipe 8 and the lead-out port 14b faces the opening edge of the drain pipe part 3 so that a required flow gap s is generated. In this state, the applicant of the present application has already proposed a structure that is disposed in the strainer 5 and prevents the rainwater from scattering (see Patent Document 1).

  Such a configuration can prevent the rainwater from scattering, and can smoothly drain rainwater flowing from the floor A through the strainer 5 into the drain tray 2 into the drain pipe portion 3 through the flow gap s. In addition, the vertical pipe 8 can be mounted while maintaining a vertical state, while the guide pipe 13 does not fit around the vertical pipe 8 and is not between the lower end of the vertical pipe 8 and the floor A. Since it can be inserted onto the drain pan 2 from the gap formed, it is excellent in workability.

On the other hand, similarly, for the purpose of preventing the scattering of rainwater, an annular water return wall having a notch is integrally projected upward from the boundary between the drain pan and the drain pipe. The inner surface of the water return wall is connected to the inner surface of the drain pipe part through a smooth curved surface, and the water return wall and the drain pipe part constitute a funnel part whose diameter decreases from the upper part to the lower part. Has also been proposed (see Patent Document 2).
JP 2002-201768 A JP 2002-309730 A

  In the above prior art, in the configuration shown in FIG. 8, as described above, it is possible to prevent the rainwater from scattering and to obtain excellent workability. However, the guide pipe 13 is provided with the strainer 5 and the drain pan. Since it is formed separately from 2, the manufacturing cost is increased accordingly.

  On the other hand, in the configuration disclosed in Patent Document 2, since the annular water return wall is integrally formed with the drain tray, the cost does not increase, but the drainage formed on the water return wall. In order to prevent the rainwater from splashing outside from the cutout portion for use, it is necessary to make the cutout portion small. Therefore, there is a problem that the drainage capacity of the rainwater flowing into the drain tray from the floor is inferior. is there. Here, when the notch portion is enlarged, not only the rainwater scattering preventing action is lowered, but also a rainwater scattering preventing means (such as a plate-shaped strainer shown in FIGS. 2 and 3 of the publication) needs to be provided separately. Will occur.

  The present invention has been made in view of the conventional situation, and the object of the present invention is to reduce the manufacturing cost, increase the drainage capacity, and facilitate the construction in the relay drain device. An object of the present invention is to provide a rainwater splash prevention device that can be used.

  According to the present invention, there is provided a relay drain provided with a drain tray attached to the floor and a strainer fixed on the drain tray by inserting a drain pipe portion coupled downward to the floor. The upper end is fitted into the drain pipe of the upper floor drain pan, the lower end is inserted into the lower floor strainer, and the vertical pipe is vertically inserted between the relay drains of each floor. In this relay drain device, the strainer has an upper end that is larger than the outer diameter of the vertical pipe and a lower end that is smaller or substantially the same diameter as the upper opening diameter of the drain pipe portion. A guide inclined cone surface as an outlet is integrally formed, its introduction port concentrically faces the lower position of the vertical pipe, and the lower part of the outlet port is concentric with the drain pipe part and the opening of the drain pipe part Make sure that there is a required gap between the edge and the outside. A rainwater shatterproof device in a relay for the drain apparatus, characterized in that mounted in the state.

  Here, the guide inclined cone surface is integrally formed inside the strainer when the strainer is cast or formed by pressing.

  In the strainer described above, a guide inclined cone surface having an upper end as an introduction port having a diameter larger than the outer diameter of the vertical pipe and a lower end as a lead-out port having a diameter smaller than or substantially the same as the upper opening diameter of the drain pipe portion is defined as an inner surface. A reduced diameter portion is formed, an attachment flange portion is formed outwardly projecting at the lower end of the reduced diameter portion, and a water drainage portion communicating with the flow gap is provided around the attachment flange portion. .

  Further, as another configuration of the strainer, a guide inclined cone having an upper end as an introduction port having a diameter larger than the outer diameter of the vertical pipe and a lower end as a discharge port having a diameter smaller than or substantially the same as the upper opening diameter of the drain pipe portion. A funnel-shaped portion having a surface as an inner surface protrudes inward, and a plurality of water passage holes are provided on a peripheral surface below the protruding position of the funnel-shaped portion.

  Furthermore, a configuration is proposed in which the strainer is divided into front and rear at a position substantially passing through the axis, and is integrally assembled from both the front and rear sides of the vertical pipe with the lower end of the vertical pipe placed therebetween.

  As described above, the present invention provides a drain for relay comprising a drain pan attached to the floor, and a strainer fixed on the drain pan through the drain pipe section coupled downward. Are arranged in the same position at the top and bottom of each floor, the upper end is fitted into the drain pipe part of the drain tray on the upper floor, the lower end is inserted into the strainer on the lower floor, and the vertical pipe between the relay drains on each floor In the relay drain device, the strainer has an upper end that is larger than the outer diameter of the vertical pipe and a lower end that is smaller than the upper opening diameter of the drain pipe portion. A guide inclined cone surface having a substantially same diameter outlet is integrally formed, the inlet is concentrically facing the lower part of the vertical pipe, and the lower part of the outlet is concentrically with the drain pipe. A required flow gap communicating with the outside is created between the opening edge of the drain pipe section. Since it is a rainwater splash prevention device in the drain device for relay, the guide inclined cone surface formed integrally in the inside of the strainer is the upper part of the drain pipe part. The lower part of the outlet that is smaller than or substantially the same diameter as the opening diameter faces the opening edge of the drain pipe so that the required flow gap communicating with the outside is created, so that the strainer from above the floor. The rainwater flowing into the drain tray through the can can be smoothly drained from the circulation gap to the drain pipe part. Here, since the flow gap can be set large, the drainage capacity is not lowered unlike the configuration disclosed in Patent Document 2, that is, a small notch is formed on the annular water return wall. In addition, the introduction port at the upper end of the guide inclined cone surface is formed to have a diameter larger than the outer diameter of the vertical pipe, and the introduction port is concentrically facing the lower position of the vertical pipe. While all the rainwater flowing down from the pipe can be received at the inlet, the lower part of the outlet that is smaller or substantially the same diameter as the upper opening of the drain pipe is provided above the drain pipe. By facing concentrically through the circulation gap, it is possible to flow all rainwater received at the inlet from the outlet to the drain pipe. Thereby, the splash of rainwater can be prevented from scattering on the surrounding floor surface. And since such a guide inclination cone surface is integrally formed in the inside of a strainer, compared with the case where the conventional separate induction pipe 13 (refer FIG. 8) is used, the manufacturing cost is significantly increased. Can be reduced.

  Further, in the strainer, a guide inclined cone surface having an upper end as an introduction port having a diameter larger than the outer diameter of the vertical pipe and a lower end as a lead-out port having a diameter smaller than or substantially the same as the upper opening diameter of the drain pipe portion. There is a configuration in which a reduced diameter portion is formed as an inner surface, a mounting flange portion is formed outwardly projecting at the lower end of the reduced diameter portion, and a water passage missing portion communicating with the flow gap is provided around the mounting flange portion. Thus, since the reduced diameter portion can be formed by a part of the outer peripheral wall of the strainer, it is possible to avoid an increase in the amount of material used during the formation. Further, the strainer can be easily fixed on the drain pan by means of the mounting flange projecting outward at the lower end of the reduced diameter portion, and further, the mounting rod can be mounted by the water drainage portion provided around the mounting flange. The circulation gap shielded by the section communicates with the outside, and the drainage function of rainwater flowing into the drain pan from the floor can be secured.

  Further, as another configuration of the strainer, a guide inclined cone having an upper end as an introduction port having a diameter larger than the outer diameter of the vertical pipe and a lower end as a discharge port having a diameter smaller than or substantially the same as the upper opening diameter of the drain pipe portion. In the case where a funnel-shaped part with the surface as an inner surface protrudes inward and a plurality of water passage holes are provided on the peripheral surface below the protruding position of the funnel-shaped part, the external shape of the strainer is Since it can be made almost the same as the truncated conical cylindrical shape of the conventional configuration, it can be used without a sense of incongruity, and it can be drained from the floor by a plurality of water holes provided on the peripheral surface below the protruding position of the funnel-shaped portion. It is possible to ensure the drainage function of rainwater flowing into the tray.

  Furthermore, in the configuration in which the strainer is divided into front and rear at a position substantially passing through the axis, and the lower end of the vertical pipe is positioned between the two, the vertical pipe is integrally assembled from both the front and rear sides. Since the strainer can be easily attached to the lower end of the tube while maintaining the tube vertically above the drain pan, the workability is excellent.

Below, the 1st Example of this invention is described according to FIGS.
As shown in FIG. 1, a drain pan 2 having a drain pipe portion 3 coupled to a lower side is provided on a floor A such as a balcony of each floor in a state where the drain pipe portion 3 is inserted into the floor A. They are arranged at positions that coincide vertically. On the drain tray 2, a strainer 20A constituting the rainwater scattering prevention device according to the present invention is fixed. The strainer 20A and the drain pan 2 constitute a relay drain 1.

  A vertical pipe 8 is vertically extended to the relay drain 1 disposed on the floor A of each floor. The vertical pipe 8 has an upper end fitted into the drain pipe portion 3 of the drain tray 2 on the upper floor, and a lower end inserted into the strainer 20A on the lower floor. The vertical drainage pipe 8 and the relay drain 1 constitute a relay drain device. When it rains, the rainwater flowing into the drain pan 2 from the floor A of each floor flows into the vertical pipe 8 to be drained. In addition, rainwater flowing down from the upper floor through the vertical pipe 8 is discharged into the strainer 20A on the lower floor, and the rainwater is sequentially poured into the drain pipe section 3 of the drain pan 2 and drained by the vertical pipe 8. It has come to be able to do.

  Inside the strainer 20A, the upper end is an inlet 21a having a diameter larger than the outer diameter of the vertical pipe 8 and the lower end is a lead-out port 21b having a diameter smaller than or substantially the same as the upper opening diameter of the drain pipe portion 3. A guide inclined cone surface 22 is integrally formed. In the first embodiment, a reduced diameter portion 23 having the guide inclined cone surface 22 on the inner surface is formed at a substantially intermediate height position of the strainer 20A, and the reduced diameter portion 23 is one of the outer peripheral walls of the strainer 20A. Has become a department. Here, the reduced diameter portion 23 includes a short cylindrical portion 24 that is continuous to the lower portion of the outlet 21 b, and an attachment flange portion 25 is provided at the lower end of the short cylindrical portion 24 that is the lower end of the reduced diameter portion 23. It is formed outward. The attachment flange 25 is provided with a plurality of water lacking portions 26 that communicate with a flow gap s described later. In addition, the fixing screw 11 can be inserted into a position that coincides with the screw hole 12a of the support step portion 12 that is partially formed in the drain tray 2 at a position that is 180 ° different from the outer peripheral edge of the mounting flange 25. A semicircular cutout 27 is formed.

  For molding the strainer 20A, molding means such as casting or pressing can be applied, and molding by casting is particularly suitable. In addition, the strainer 20A is divided into front and rear at a position substantially passing through the axis for easy construction, and a flange portion 29 having an insertion hole 28 for the mounting bolt 30 on the outer side of the divided surface is left and right. It is provided in a pair. Then, the divided surfaces are abutted, and as shown in FIG. 3, the assembly bolts 30 are respectively inserted into the insertion holes 28, 28 of the flange portions 29, 29 opposed in the front-rear direction, and screwed into the protruding end side. The nut 31 can be integrally assembled through the tightening action of the nut 31. Further, as shown in FIG. 4, a plurality of screw holes 6 into which the pressing screws 7 are screwed are formed at equal intervals in the circumferential direction on the peripheral surface near the upper end of the strainer 20A.

  Then, the strainer 20A concentrically faces the inlet 21a of the guide inclined cone surface 22 at the lower position of the vertical pipe 8, and the lower part of the outlet 21b is concentric with the drain pipe 3 and the drain pipe. It can be mounted on the drain pan 2 in such a manner that a required flow gap s communicating with the outside is formed between the opening edge of the portion 3 and the outside.

  Next, the construction procedure of the strainer 20A and the vertical pipe 8 will be described. In a state where the drain pan 2 is disposed at a position where the drain pipe portion 3 is inserted through the floor A and is vertically aligned with each floor A, first, the vertical pipe 8 is set vertically and its upper end Is fitted to the drain pipe portion 3 of the drain tray 2 on the upper floor. Then, the vertical surface of the vertical pipe 8 is maintained, and the divided surfaces of the strainer 20 </ b> A formed separately are abutted from both the front and rear sides of the vertical pipe 8 with the lower end portion of the vertical pipe 8 positioned therebetween. They are assembled together with the assembly bolts 30 and nuts 31. Next, the notches 27 formed in the mounting flange 25 are respectively aligned with the screw holes 12a of the support step 12, and the fixing screw 11 is inserted into the notches 27 from above so that the fixing screw 11 is screwed. Screw into the hole 12a. Thereby, the strainer 20 </ b> A is fixed at a predetermined position on the drain tray 2. Thereafter, a pressing screw 7 is screwed into each screw hole 6 formed on the upper peripheral edge of the strainer 20A, and the tip thereof is brought into pressure contact with the peripheral surface of the vertical pipe 8 so that the lower end of the vertical pipe 8 is provided. Is fixed, and the intermediate portion of the vertical pipe 8 is held by the support piece 9 (see FIG. 8), thereby completing the construction.

  Thus, the strainer 20A divided and formed at the front and rear at a position substantially passing through the axis line is assembled with the lower end portion of the vertical pipe 8 maintained in a vertical state above the drain tray 2 with the divided surfaces butted from both the front and rear sides. Since the attachment bolt 30 and the nut 31 can be assembled together, the construction can be performed very easily. Accordingly, the strainer 20A can be easily attached to the lower end portion of the vertical pipe 8 even if there is no sufficient gap for inserting the strainer 20A between the lower end of the vertical pipe 8 and the upper surface of the drain tray 2. Can do.

  In this construction state, as shown in FIG. 1, the guide inclined conical surface 22 integrally formed inside the strainer 20 </ b> A has a lower outlet outlet 21 b smaller than the upper opening diameter of the drain pipe 3. Alternatively, they are formed to have substantially the same diameter, and the lower part of the outlet port 21b is concentric with the drainage pipe part 3 and faces the opening edge of the drainage pipe part 3 so that a required flow gap s is generated. Accordingly, the rainwater flowing into the drain tray 2 from the floor A through the water drainage portion 26 of the strainer 20A can be smoothly drained from the circulation gap s to the drain pipe portion 3. Here, since the circulation gap s can be set large, the drainage capacity of the rainwater flowing in from the floor A is not lowered. Further, the introduction port 21a at the upper end of the guide inclined cone surface 22 is formed to have a diameter larger than the outer diameter of the vertical rod tube 8, and concentrically faces the lower port of the vertical rod tube 8. As a result, all rainwater flowing down from the vertical pipe 8 can be received by the introduction port 21a, and can flow from the lower outlet port 21b to the drainage pipe part 3 through the guide action of the guide inclined cone surface 22. it can. Thereby, the splash of rainwater does not scatter on the surrounding floor surface. And since such a guide inclined cone surface 22 is integrally formed in the inside of the strainer 20A, compared with the case where the guide pipe 13 (refer FIG. 8) formed separately conventionally is used, its manufacturing cost is compared. Can be greatly reduced. In the first embodiment, since the reduced diameter portion 23 can be formed by a part of the outer peripheral wall of the strainer 20A, an increase in the amount of material used during formation can be avoided. Further, the strainer 20A can be easily fixed on the drain pan 2 by the mounting flange 25 projecting outward from the lower end of the reduced diameter portion 23. Further, the lack of water flow provided around the mounting flange 25 is provided. By the portion 26, the circulation gap s shielded by the attachment flange portion 25 communicates with the outside, and the drainage function of rainwater flowing into the drain tray 2 from the floor A can be secured.

  5 and 6 show a second embodiment. The strainer 20B in the second embodiment has an outer appearance of a truncated conical cylinder shape, and the upper end of the vertical tube 8 is positioned at a substantially intermediate height position inside thereof. A funnel-shaped portion 32 having a guide inclined conical surface 22 as an inner surface, the inlet 21a having a diameter larger than the outer diameter of the drain pipe portion 3 and the outlet 21b having a lower diameter or substantially the same diameter as the upper opening diameter of the drainage pipe portion 3 is formed inside. Has been formed. In addition, a plurality of water passage holes 33 are provided on the peripheral surface below the projecting position of the funnel-shaped portion 32.

  For the formation of the strainer 20B, a molding means such as casting or pressing can be applied as in the first embodiment, but molding by casting is particularly suitable. In addition, the strainer 20B is divided into front and rear portions at positions substantially passing through the axis to facilitate construction, and a pair of left and right flange portions 29, 29 are provided on the outer side of the divided surface. Then, the assembly bolts 30 inserted into the respective insertion holes 28 of the flange portions 29 and 29 and the nut 31 screwed to the projecting end side of the assembly bolt 30 are integrated through a tightening action. It can be assembled.

  In addition, the strainer 20B has the introduction port 21a of the funnel-shaped portion 32 having the guide inclined conical surface 22 as an inner surface facing the lower position of the vertical pipe 8 and concentrically with the lower portion of the outlet port 21b. 3 is mounted on the drain pan 2 in a state of concentric with the opening edge of the drain pipe portion 3 so as to face a required flow gap s communicating with the outside. Other configurations are the same as those of the first embodiment, and the same parts are denoted by the same reference numerals and redundant description is omitted.

  In such a configuration, the funnel-shaped portion 32 having the guide inclined cone surface 22 integrally formed inside the strainer 20 </ b> B has a outlet port 21 b at its lower end smaller than or substantially the same as the upper opening diameter of the drain pipe portion 3. The lower part of the outlet port 21b is concentric with the drainage pipe part 3 and faces the opening edge of the drainage pipe part 3 so that a required flow gap s is generated. Rainwater flowing into the drain tray 2 from the floor A through the water passage hole 33 of the strainer 20B can be smoothly drained from the flow gap s to the drain pipe section 3. Here, since the circulation gap s can be set large, the drainage capacity of the rainwater flowing in from the floor A is not lowered. Further, the introduction port 21a at the upper end of the guide inclined cone surface 22 is formed to have a diameter larger than the outer diameter of the vertical rod tube 8, and concentrically faces the lower port of the vertical rod tube 8. As a result, all rainwater flowing down from the vertical pipe 8 can be received by the introduction port 21a, and can flow from the lower outlet port 21b to the drainage pipe part 3 through the guide action of the guide inclined cone surface 22. it can. Thereby, the splash of rainwater does not scatter on the surrounding floor surface. And when the funnel-shaped part 32 provided with such a guide inclination cone surface 22 is integrally formed in the inside of the strainer 20B, when the conventional induction pipe 13 (refer FIG. 8) formed separately is used. In comparison, the manufacturing cost can be greatly reduced. In the second embodiment, the external shape of the strainer 20B can be made substantially the same as the truncated conical cylinder of the conventional configuration, so that it can be used without a sense of incongruity, and the protruding position of the funnel-shaped portion 32 The drainage function of rainwater flowing into the drain pan 2 from the floor A can be secured by the plurality of water holes 33 provided on the lower peripheral surface.

It is a longitudinal cross-sectional view which shows the construction state of the drain apparatus for relay provided with the rain water scattering prevention apparatus concerning a 1st Example. It is an external appearance perspective view of the strainer 20A which comprises a rainwater scattering prevention apparatus. It is XX sectional drawing in FIG. It is YY sectional drawing in FIG. It is a longitudinal cross-sectional view which shows the construction state of the drain apparatus for relay provided with the rain water scattering prevention apparatus concerning a 2nd Example. It is an external perspective view of one side of the strainer 20B that constitutes the rainwater scattering prevention device of the above. It is a longitudinal cross-sectional view which shows the construction state of the drain apparatus for relay of a conventional structure. It is a longitudinal cross-sectional view which shows the construction state of the drain apparatus for relay of the conventional structure by which the induction pipe 13 was arrange | positioned in the strainer 5. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Relay drain 2 Drain pan 3 Drain pipe part 8 Vertical pipe 20A, 20B Strainer 21a Inlet 21b Outlet 22 Guide inclination cone surface 23 Reduced diameter part 25 Mounting hook part 26 Water lack part 32 Funnel-shaped part 33 Water flow Hole A Floor s Flow gap

Claims (4)

The drainage pipe part coupled downward is inserted into the floor, and the relay drain provided with the drain pan attached to the floor and the strainer fixed on the drain pan is in a position where the upper and lower sides of each floor coincide with each other. A relay drain that is installed, with the upper end fitted into the drain pipe part of the drain tray on the upper floor, the lower end inserted into the strainer on the lower floor, and the vertical pipe vertically passed between the relay drains on each floor In the device
The strainer has a guide inclined cone surface with an upper end as an introduction port having a diameter larger than the outer diameter of the vertical pipe and a lower end as a lead-out port having a diameter smaller than or substantially the same as the upper opening diameter of the drain pipe portion. Are formed integrally, with the introduction port concentrically facing the lower part of the vertical pipe, and the lower part of the outlet port is concentric with the drain pipe part and between the opening edge of the drain pipe part. A rainwater scattering prevention device for a relay drain device, wherein the device is attached in a state of facing a required flow gap communicating with the relay drain device.   The strainer has a reduced diameter with the guide inclined cone surface as the inner surface, with the upper end as the inlet opening larger than the outer diameter of the vertical pipe and the lower end as the outlet opening smaller than or approximately the same diameter as the upper opening diameter of the drain pipe section. 2. A mounting portion is formed at the lower end of the reduced diameter portion, and a water passage lacking portion communicating with the flow gap is provided around the mounting flange. The rainwater scattering prevention apparatus in the relay drain apparatus as described.   The strainer has a funnel shape with a guide inclined cone surface on the inner surface, the upper end of which is larger than the outer diameter of the vertical pipe and the lower end is a lead-out port that is smaller or substantially the same diameter as the upper opening of the drainage pipe. 2. A rain drain scattering prevention in a relay drain device according to claim 1, wherein said portion is formed inwardly and a plurality of water passage holes are provided in a peripheral surface below the protruding position of said funnel-shaped portion. apparatus. The strainer is divided and formed front and rear at a position substantially passing through the axis, and is integrally assembled from both the front and rear sides of the vertical pipe with the lower end portion of the vertical pipe placed therebetween. The rainwater scattering prevention apparatus in the drain apparatus for relay in any one of Claim 1 thru | or 3.

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