JP4926291B1 - Drain filter for rainwater infiltration pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drainage filter capable of discharging rainwater stagnating in a sediment pool.
A drainage filter used in a rainwater infiltration structure in which a bottom portion of a street mast is opened and a permeation pipe WP penetrating the opening is disposed in the ground. The drainage filter is attached to the upper end of the permeation pipe, and has a cylindrical main body 1 in which permeation holes 4 are formed at a plurality of locations on the side wall, a filter material 2 disposed inside the main body, and supports the filter material However, it is provided with a filter support portion 3 detachably provided on the main body portion and a ventilation member 5 penetrating the filter material.

Description

  The present invention relates to a drainage filter used for a rainwater permeation pipe having an opening at the bottom of a street mast (collecting water) and a permeation pipe penetrating the opening in the ground, and in particular, a rainwater permeation pipe. It is related with the drainage filter installed in the upper end of this.

  In recent years, if there is rainfall that exceeds the capacity of the sewage pipe due to the so-called torrential rain called guerrilla heavy rain, rainwater accumulates on the road surface. When it entered the area, it would cause damage such as flooding on the floor. Therefore, there is a need for a structure that can effectively infiltrate rainwater flowing into the streets into the ground, but the applicants of the present application have a ground that has permeability from the bottom of streets. In addition, a drilling device for installing a permeation pipe in a range extending to the area was proposed, and a rainwater infiltration structure capable of infiltrating rainwater into the ground because of the streets in an urban area was also proposed (see Patent Document 1).

  The above-mentioned rainwater infiltration structure is configured to fill the inside of the infiltration pipe placed in the ground with the filter material. When rainwater flowing down from the streets penetrates into the ground, oil and metal contained in rainwater That can be removed.

  However, when rainwater flows into the street, it also includes earth and sand that exist on the road surface. Therefore, a trap structure called a sediment pool (also called a mud pool) is adopted for ordinary streets. It was configured to discharge the supernatant water that flows into the streets. Furthermore, since the rainwater flowing into the permeation pipe beyond the trap contains sand, dust, and the like, a filter is provided at the upper end of the permeation pipe (see Patent Document 2).

Japanese Patent No. 4465029 JP 2006-138197 A (page 7, FIG. 3)

  The filter disclosed in Patent Document 2 is composed of a filter frame formed in a mesh shape and a fine filter disposed in the filter frame. The filter frame prevents inflow of large dust. It is configured to prevent the inflow of solid substances (gravel, sand, etc.) contained in rainwater.

  However, the city streets with earth and sand pools are those in which rainwater flows in from the top opening of the permeation pipe when a large amount of rainwater flows in and the water level exceeds a certain height (height of the permeation pipe opening). When the water level of the rainwater flowing into the street is low, the street is stagnant. As a result, rainwater stagnating in the puddle accumulated for a long period of time, which was the source of mosquitoes. In addition, when sediment has accumulated in the sediment reservoir, rainwater has permeated into the sediment, and even though this permeated water cannot evaporate and the surface of the sediment is dry, The permeated water was to stay for a long time. Even in such a state, it was still a source of mosquitoes.

  The present invention has been made in view of the above-described points, and an object of the present invention is to provide a drainage filter capable of discharging rainwater stagnating in a sediment pool.

Therefore, the present invention provides a rainwater infiltration structure in which a bottom portion of a street mast is opened and an infiltration pipe penetrating the opening is disposed in the ground. A cylindrical main body having permeation holes formed therein, a filter material disposed inside the main body, a filter support that is detachably provided on the main body while supporting the filter, and A filter member that passes through the filter material, and the filter support portion includes a bottom portion and a top plate portion that allow water to pass therethrough, and holds the filter material between the bottom portion and the top plate portion. The ventilation member is a ventilation member that penetrates the filter material while connecting the bottom portion and the top plate portion .

According to the above configuration, when the rainwater that has flown into the street reaches a level that exceeds the upper end of the main body connected to the permeation pipe, the rainwater flows into the main body from the upper opening of the main body, It will be drained by the osmotic pipe. At this time, a large amount of rainwater flows from the upper opening of the main body, but the air below the filter material can be discharged upward by the ventilation member that penetrates the filter material. In particular, during drainage due to heavy rain, the amount of rainwater flowing down the main body is large, and when a large amount of rainwater passes through the filter material, there is no escape space for air below the filter material, resulting in a large amount of rainwater. There was a possibility that rainwater could not flow down to the permeation pipe. However, if air below the filter material can be discharged upward through the ventilation member, the flow down to the permeation pipe can be made smooth. Further, when the level of rainwater flowing into the street is lower than the upper end of the main body, rainwater can be flowed into the permeation pipe from the permeation hole on the side wall of the main body via the filter material. Therefore, when the main body is connected to the permeation pipe, it is possible to form a trap structure at the bottom of the street mast and provide a sediment puddle. Also, rainwater that permeates the sediment accumulated in this sediment puddle from the main body It can be discharged to the permeation tube. Furthermore, since the filter material supported by the filter support portion is held between the bottom portion and the top plate portion, the filter material can be attached and detached by removing the bottom portion or the top plate portion of the filter support portion. Can do. Further, since the ventilation member is provided so as to connect the bottom portion and the top plate portion, the ventilation member has a function as a column of the filter support portion, and these can be attached to the main body portion as a unit. it can.

  In the above invention, the main body portion has a predetermined length dimension, and can be configured to be mounted so as to extend from an upper end edge of the permeation tube.

  According to the above configuration, the position of the upper end opening of the infiltration pipe is such that the position of the upper end of the main body becomes a substantial opening position, and when the water level of rainwater that has flowed into the street reaches the opening position, Rainwater will flow into the reservoir, and the amount of sediment such as sediment due to the trap structure (sediment pool) can be adjusted by the length of the main body. In this case, the upper end opening (actual opening position) of the permeation tube body is located near the bottom of the street.

  In each of the above inventions, the main body portion may be a main body portion having a permeation pipe connecting portion at a lower portion and a top plate holding portion at an upper portion.

  According to the above configuration, of the cylindrical main body, the lower part can function exclusively as a component for connection with the permeation tube, and the upper part can function exclusively as a component for holding the top plate. . As a result, the main body portion is in a state where the lower osmotic tube connecting portion is connected to the osmotic tube and supported by the osmotic tube, and the top plate portion of the filter support portion is supported at the upper portion. The bottom portion connected by the top plate portion and the ventilation member, and the filter material held by the top plate portion and the bottom portion are supported by the upper portion of the main body portion (top plate portion holding portion) together with the top plate portion. Become. Therefore, the filter material can be held inside the main body.

  Further, the present invention provides a rainwater infiltration structure in which a bottom portion of a street mast to which a sewage pipe is connected is opened and an osmosis pipe penetrating the opening is disposed in the ground, and is attached to the upper end of the osmosis pipe. And a cylindrical main body having permeation holes formed in a plurality of locations on the side wall, a filter material disposed inside the main body, and a detachable attachment to the main body while supporting the filter material. A filter support portion; and a ventilation member supported by the filter support portion while penetrating the filter material. The filter support portion includes a water-permeable bottom portion and a top plate portion, and the bottom portion and the top plate portion. A filter support portion for holding the filter material in the middle of the filter member, and the ventilation member includes a lower protruding region protruding from the bottom portion, an upper protruding region protruding from the top plate portion, and the filter material passing through the filter material. Bottom and top plate Characterized in that it is a ventilation member formed by divided into a middle region which connects the.

  According to the said structure, the filter material supported by a filter support part will be installed in the inside of the main-body part with which the upper end of an osmosis | permeation pipe | tube is mounted | worn. Therefore, both the rainwater flowing from the upper opening of the main body and the rainwater flowing from the permeation hole of the main body side wall can flow into the permeation pipe after passing through the filter material. Further, since the ventilation member can vent from the lower side to the upper side of the filter material, when rainwater passes through the inside of the main body, the air below the main body can be moved to the inside of the street, so-called The air vent facilitates the flow of rainwater in the main body.

  In the above invention, the ventilation member may be configured such that the upper end of the upper projecting region has a length higher than the opening of the sewer pipe connected to the street.

  According to the above configuration, a sewer pipe is connected to the city street, and when the rainwater level flowing into the city street is higher than the opening of the sewer pipe, it flows into the sewer pipe. If the water level is lower than the opening of the sewer pipe, it will be stored in the street. Therefore, when the upper end of the ventilation member is lower than the opening of the sewer pipe, the air in the permeation pipe cannot be sufficiently removed. When the water flows in, it can be quickly flowed into the permeation tube.

  In each of the above inventions, the top plate portion may have a structure in which a plurality of penetration holes having a larger diameter than the penetration hole are formed.

  According to the above configuration, the amount of rainwater flowing from the top plate, that is, the upper opening of the main body, is larger than the amount of rainwater flowing from the permeation holes in the main body side wall, and the amount of rainwater exceeding the sediment pool flows into the streets. Then, it becomes possible to drain the rainwater quickly. Further, at this time, since the air below the filter material is discharged to the outside of the main body by the ventilation member penetrating the filter material, the inflow can be promoted.

  According to the present invention, the rainwater that has flowed into the street wall passes through the permeation hole provided in the main body near the bottom surface of the street wall, so that a trap is formed to form a sediment. Even on the streets, rainwater stagnating in the sediment can be discharged from the penetration hole of the main body to the rainwater penetration pipe. At this time, when rainwater passes through the filter material disposed inside the main body, the rainwater is drained into the permeation pipe while being filtered.

  Even when sediment has accumulated in the sediment reservoir, the rainwater that has permeated the sediment will stagnate in the lower part of the sediment, and the rainwater that has moved between the grains of the sediment will be infiltrated. It can be discharged from.

  In this way, the drainage of rainwater stagnating in the city basin is reduced, thereby reducing the source of mosquitoes and providing a comfortable living environment.

  On the other hand, since the ventilation member is provided through the filter material, it is possible to ventilate between the lower part of the filter material and the upper part of the main body, and even when a large amount of rainwater flows into the main body. The air stagnating in the lower part can be extracted outside, and the flow of rainwater can be promoted.

It is a disassembled perspective view which shows embodiment of this invention. It is sectional drawing of the state which integrated each member of embodiment. It is sectional drawing which shows the state which installed embodiment in the rainwater osmosis | permeation pipe | tube. It is explanatory drawing which shows the use condition of embodiment. It is explanatory drawing which shows the use condition of embodiment. It is a disassembled perspective view which shows other embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view showing an embodiment of the present invention. As shown in this figure, the present embodiment includes a main body 1 that can be connected to an upper end of a rainwater permeation pipe (hereinafter referred to as a permeation pipe) WP, a filter material 2 disposed inside the main body 1, and the filter material. 2 and a filter support portion 3 that supports 2.

  The main body 1 is roughly divided into a lower part 11, a body part 12, and an upper end part 13. The lower portion 11 is formed in a substantially cylindrical shape so as to be connected to the cylindrical permeation tube WP, and the inner diameter thereof is substantially the same as the outer diameter of the permeation tube WP. By bringing the inner surface of the lower portion 11 into close contact with the outer surface of the permeation tube WP so that the lower portion 11 surrounds the vicinity of the tip of the permeation tube WP, the lower portion 11 is connected to the permeation tube WP. Therefore, in the following, this lower part 11 is referred to as a permeation pipe connecting part.

  The body portion 12 is formed in a cylindrical shape having a diameter larger than that of the permeation tube connecting portion 11 and is configured to have a predetermined length dimension in the axial direction. Furthermore, a plurality of through-holes (referred to as permeation holes) 4 aligned along the axial direction of the body 12 are formed in the side wall of the body 12. The aggregates (permeation hole groups) 40 of the permeation holes 4 aligned in this way are provided over the entire circumference of the trunk portion 12, and each permeation hole group 40 has a predetermined interval in the circumferential direction. As described above, the permeation hole group 40 is configured by the plurality of permeation holes 4 aligned in the axial direction of the trunk portion 12, thereby allowing rainwater to permeate in the range from the lower order to the upper order in the axial direction of the trunk section 12. Can be done. In addition, although the trunk | drum 12 may be comprised with the same diameter as the osmosis | permeation pipe | tube connection part 11, since the filter material 2 is arrange | positioned inside, in order to enlarge flow volume, the diameter is enlarged. Therefore, the boundary part with the osmosis | permeation pipe connection part 11 is made into a taper shape, and it comprises so that the cylindrical member of a different diameter may continue.

  The upper end 13 of the main body 1 is formed with an opening continuously from the body 12 so that the filter support 3 can be attached to the opening. The top plate portion 31 constituting the filter holding portion 3 can be mounted like a lid for closing the opening of the upper end portion 13, and the upper end portion 13 functions as a top plate portion holding portion. The top plate portion 31 held by the upper end portion (top plate portion holding portion) 13 is connected to the bottom portion 32 so that both are supported by the upper end portion 13.

  The filter material 2 is formed by molding a fibrous or porous material or the like, and is molded into a shape that can be placed inside the main body 1. The material used here only needs to be filtered to such an extent that the earth and sand in the streets are not mixed. For this purpose, a coarse filter medium is used. In addition, the through-hole 21 is provided in the center of the filter material 2, and it is comprised so that the below-mentioned ventilation member 5 can be penetrated.

  As above-mentioned, the filter support part 3 is comprised by the top-plate part 31 and the bottom part 32, Comprising: The filter material 2 is hold | maintained between both. Each of the top plate portion 31 and the bottom portion 32 has through holes 33 and 34 in the vicinity of the center thereof, and both are integrally formed by the ventilation member 5 inserted through the through holes 33 and 34. Yes. That is, the top plate portion 31 and the bottom portion 32 are configured by independent individual members, and the ventilation member 5 is connected to the top plate portion 31 and the bottom portion 32.

  Here, the ventilation member 5 is constituted exclusively by a straight pipe 51, and penetrates the top plate portion 31, the filter material 2 and the bottom portion 32 at the same time. A large-diameter tube body (first tube body) 52 is mounted at an appropriate position of the pipe 51 and functions as a positioning member that determines the mounting position of the top plate portion 31. A large-diameter tube (second tube) 53 can also be connected to the lower end of the pipe 51, and functions as a stopper for preventing the bottom 32 from descending. Accordingly, the top plate portion 31 and the bottom portion 32 constituting the filter support portion 3 are arranged with a predetermined interval between the first tubular body 52 and the second tubular body 53, and this By arranging the filter material 2 between the two, the filter material 2 is configured to be sandwiched between the top plate portion 31 and the bottom portion 32.

  The first and second tubular bodies 52 and 53 attached to the pipe 51 may be attached with an adhesive or the like, but can be attached or detached by screwing at least the second tubular body 53, for example. The bottom portion 32 and the filter material 2 can be removed from the ventilation member 5. By setting it as this removable structure, the filter material 2 can be replaced | exchanged.

  The pipe 51 is provided so as to protrude upward from the top plate portion 31 with a predetermined length (that is, with a predetermined length from the first tubular body 52). Air can be moved between the upper portion and the lower portion of the bottom portion 32. The upper end of the pipe 51 is opened for ventilation, but in addition to the mode in which the straight pipe 51 is opened as it is, a T-shaped pipe that can be bifurcated as shown in the figure ( A so-called cheese) 54 may be provided. Thus, in the case of the configuration in which the cheese 54 is provided, mixing of dust and the like from the upper end of the pipe 51 can be suppressed. In the present embodiment, the pipe 51 is constituted by a single continuous pipe. However, by forming the first pipe body 52 by a pipe joint, the pipe 51 is formed by two pipes while keeping the internal space continuous. Is also possible. In this case, the length protruding upward from the top plate portion 31 can be appropriately changed according to the size of the street lamp used.

  Thus, although the filter support part 3 is connected and integrated by the ventilation member 5, this filter support part 3 must be able to pass water in order to allow rainwater to flow down. Therefore, as shown in the drawing, the top plate portion 31 and the bottom portion 32 are provided with a plurality of large through holes 35 in the top plate portion 31, while the bottom portion 32 has four plate-like members 36, It is good also as a form which protrudes 37,38,39, and is provided so that it may form in a cross shape. In addition, as long as the top-plate part 31 and the bottom part 32 can permeate | transmit water, what kind of shape and structure may be sufficient as it.

  Moreover, the top plate part 31 should just be the structure which can be mounted | worn with the main-body part 1, for example, as shown in the figure, the side wall part of the top-plate part 31 has the same diameter part 30A as the upper end part 13 of the main body part 1, and A small-diameter portion 30B that can be fitted into the upper end portion 13 can be used. With such a configuration, the small-diameter portion 30B can be attached to the main body 1 by inserting the small-diameter portion 30B into the main body 1 and bringing the same-diameter portion 30A into contact with the edge of the upper end portion 13. In addition to such a mounting method, a portion having a larger diameter than the upper end portion 13 may be provided so that the upper end portion 13 can be covered.

  The state which connected each member about this embodiment of the said structure is shown in FIG. As shown in this figure, the top plate portion 31 constituting the filter support portion 3 is mounted on the upper end of the main body portion 1, the filter material 2 is disposed between the top plate portion 31 and the bottom portion 32, and the bottom portion 32 is The pipe 51 is supported while being lowered by the pipe body 53 at the tip. In this state, the filter material 2 is supported by the filter support portion 3 (the top plate portion 31 and the bottom portion 32), and the filter support portion 3 including the filter material 2 is supported by the upper end of the main body portion 1. .

  Therefore, the top plate portion 31 and the bottom portion 32 constituting the filter support portion 3 and the filter material 2 supported by the top plate portion 31 and the bottom portion 32 can be mounted inside the main body portion 1 without dropping downward from the main body portion 1. It can be done.

  Further, the pipe 51 is disposed so as to protrude above the filter material 2 while penetrating the filter material 2, and an upper end thereof is opened. Therefore, ventilation is possible between the lower side of the filter material 2 and the upper side of the filter material 2. Thereby, when rain water flows through the inside of the main body 1 (passing through the filter material 2), the air present in the lower portion of the filter material 2 can be discharged to the outside of the main body 1.

  Therefore, as shown in FIG. 3, by setting the position of the lower end of the pipe 51 inside the main body 1, the pipe 51 can be arranged near the upper end of the permeation pipe WP. Thereby, air can be extracted from the inside of the main body 1 and the permeation tube WP. That is, in the state where air is present in the cylindrical main body 1 or the permeation pipe WP, when rainwater flows in, air is discharged from the gap between the water instead of rainwater, but a large amount of water flows in. In some cases, there is no gap in water, and water does not flow in because air does not escape. Similarly, when water penetrates the entire filter material 2 and the air cannot move, the air may not flow and the water may not flow down. Therefore, by arranging the pipe 51 that opens immediately below the filter material 2 where air is most likely to accumulate, the air inside the main body 1 or the permeation pipe WP can be discharged outward.

  Since the present embodiment is configured as described above, as shown in FIG. 4, the main body 1 attached to the permeation tube WP is in a state in which the permeation tube WP is extended, and the tube body (permeation tube) The position of the opening of the entire WP and the main body 1 is integrated above the upper end of the permeation tube WP. The permeation tube WP and the main body portion 1 can be attached by inserting the permeation tube WP inside the permeation tube connecting portion 11 of the main body portion 1. However, in order to firmly attach the main body portion 1. The both contact surfaces may be bonded with an adhesive or the like.

  And when the main-body part 1 is installed in the upper end of the osmosis | permeation pipe | tube WP provided in the street mast X, it can be set as the street mound structure which has an earth and sand puddle. In other words, as shown in the figure, the bottom of the city street X is opened, and the upper end of the permeation pipe WP is located near the bottom of the city street X. By connecting the above-described embodiment (drainage filter F) to the upper edge, the permeation pipe WP is extended upward, and its open end is located at a predetermined height H1 from the bottom of street lamp X. It will be. Therefore, when the water level of the rainwater flowing into the street wall X exceeds the predetermined height H1, the drainage filter F is drained from the upper end opening (through hole provided in the top plate 31) to the permeation pipe WP. It is. On the contrary, when the rainwater level is lower than the predetermined height H1, the drainage filter F is not drained from the upper end opening (the inflow from the permeation hole 4 is possible, but is considered here). Not) Thus, the trap is formed by mounting the drainage filter F, and the trap structure constitutes the sediment.

  By the way, a sewer pipe UP is connected to a general street masque X, and the rainwater that has flowed into the street masquer X is joined to the sewage. This sewer pipe UP is connected so as to open at a predetermined height H2 from the bottom surface of the street wall X, and this height also constitutes a sediment pool. Therefore, even when the permeation pipe WP is not installed, the ordinary street mascot X is composed of sediment, and this sediment prevents the sediment from flowing into the sewer pipe UP. It is doing. As described above, it is common for the street masquerade X to form a sediment reservoir, and even when the permeation pipe WP is installed, it is required to configure the sediment reservoir to suppress sediment discharge. It is.

  Here, in the usage form as shown in FIG. 5, the opening of the sewer pipe UP is provided above the height H <b> 1 of the upper end of the drainage filter F. This is a so-called base cut method, and at the water level that exceeds the height of the upper end of the drainage filter F, it is drained to the permeation pipe WP first. When the water level rises and the water level rises, it is drained into the sewer pipe UP. In addition to the form shown in this figure, in the case of the so-called peak cut method, the opening height H2 of the sewer pipe UP is adjusted to be lower than the opening height H1 of the drainage filter F. The height adjustment for that can be easily accommodated by changing the length of the body part 12 of the main body part 1.

  In this way, by making one of the heights H1 and H2 different from the other, priority can be given to drainage from either the permeation pipe WP or the sewer pipe UP. It is possible to predict the flow rate when draining rainwater.

  Moreover, it is preferable to install the upper end position of the ventilation member 5 at an appropriate height. That is, as shown in FIG. 5, the upper openings (openings by the cheese 54) 55 and 56 of the ventilation member 5 are provided higher than the opening position of the sewer pipe UP, thereby flowing into the sewer pipe UP. Even if rainwater to such an extent flows into the street X, the air inside the drainage filter F and the permeation pipe WP can be discharged to the outside.

  In general, if all the air in the pipe is discharged to the outside of the pipe, it is not necessary to vent the air. However, in the present embodiment, rainwater is expected to permeate into the ground in the permeation pipe WP. For this reason, since air contained in the ground may enter the pipe when it penetrates into the ground, it is opened with a sufficient height H3 from the opening of the sewer pipe UP.

  On the other hand, in the form of use as described above, when the earth and sand flows into the sand basin of the city street X, these earth and sand will not be discharged from either the permeation pipe WP or the sewer pipe UP. As a result, Sediment accumulates around the drainage filter F. The state is shown in FIG.

  As shown in this figure, the sediment sediment TR is accumulated in the sediment reservoir, but rainwater that is not drained is also stagnant in the sediment reservoir. The rainwater stagnating in a general street is not drained to the outside unless the rainwater further flows and the water level rises, and the amount of water is reduced by evaporation during the period when there is no rainfall. On the other hand, in the present embodiment, since the permeation hole group 40 is formed in the main body 1 of the drainage filter F, rainwater that has permeated the sediment TR accumulated in the sediment reservoir is gradually discharged to the permeation pipe WP. It can be done.

  In other words, although a large amount of rainwater cannot be discharged at a time, rainwater stagnant with earth and sand will pass between stones and sand, and will accumulate at the bottom of town street X. In the vicinity of the bottom of X, rainwater that has reached the permeation hole group 40 that has opened passes through the permeation hole group 40 and flows into the permeation pipe WP. As a matter of course, the permeation hole group 40 is not opened in such a size that earth and sand can pass through, and only rainwater that has passed between stones and sand grains is discharged. At the time of this discharge, since it passes through the internal filter material 2, it is possible to avoid foreign matters from being mixed into the waste water.

  The discharge of stagnant water such as the above is the same not only for residual water after heavy rain, but also when a small amount of rainwater flows into town street X due to a small amount of rainfall such as showers. In other words, even if the sediment TR accumulated in the sediment is dry, if a small amount of rainwater flows into the streets X due to rainfall, the rainwater wets the sediment TR in the sediment. When it flows in more than a certain degree, it passes through the stones and sand grains of the sedimentary sediment TR and moves to the bottom of the street X, so the rainwater thus moved is the main body of the drainage filter F. That is, it is discharged from the permeation hole group 40 provided in the part 1.

  The permeation pipe WP is provided with a hole (not shown) to the extent that rainwater can pass below the street wall X, and the backfill sand S having a large particle size is disposed around the permeation pipe WP. Rainwater that has flowed into the ground is infiltrated into the ground. In particular, in the vicinity of the lower end of the rainwater commissioning pipe, there is a structure for allowing a large amount of rainwater to penetrate into the ground. Since the configuration of the permeation tube WP is not directly related to the present invention, the description thereof is omitted.

  Since the present embodiment is as described above, the drainage filter F can be used to filter the rainwater flowing into the permeation pipe WP. In addition, a trap can be formed inside the street wall X to form a sediment pool. In addition to having these effects, rainwater stagnating in the sediment can be gradually discharged to the permeation pipe WP. Therefore, rainwater does not stagnate for a long time on the street mast X, and it is possible to suppress generation of mosquitoes and the like.

  In addition, the said embodiment is an example of this invention, Comprising: It is not limited to such a structure. Therefore, it can be set as various aspects. As an example, in the above-described embodiment, the filter support portion 3 is configured by the top plate portion 31 and the bottom portion 32, and only the configuration for supporting the filter material 2 in the middle has been described. It is good also as a structure which supports the filter material 2 by this taper part by making the boundary part of the pipe | tube connection part) 11 and the trunk | drum 12 into a taper shape. In this case, the filter support portion is formed during the configuration of the main body portion 1, but the present invention does not exclude such a configuration. Then, by directly inserting the ventilation member 5 through such a filter material 2, the filter material 2 has an appropriate weight, and therefore does not easily detach from the main body. And in the case of such a structure, the upper end of the main-body part 1 becomes an open end, and it becomes possible to allow a lot of rainwater to flow in.

  Furthermore, although the penetration hole group 40 of the said embodiment is the structure which provided the fine through-hole 4 in alignment, it may replace with this and may be comprised by a long hole. The long hole in this case is also a kind of the through hole group when it is considered that each through hole 4 of the permeation hole group 40 is provided extremely close and as a result is continuous in the axial direction of the main body 1. It can be said.

DESCRIPTION OF SYMBOLS 1 Main body part 2 Filter material 3 Filter support part 4 Penetration hole 5 Ventilation member 11 Permeation pipe | tube connection part (lower part of main body part)
12 Body portion 13 Upper end portion of body portion 21 Filter through hole 31 Top plate portion 32 Bottom portion F Drainage filter TR Accumulated sediment UP Sewerage pipe WP Permeation pipe X

Claims (6)

In the rainwater infiltration structure formed by opening the bottom of the street mast and arranging an infiltration pipe penetrating this opening in the ground,
A cylindrical main body portion that is attached to the upper end of the permeation tube and has perforation holes formed in a plurality of locations on the side wall; a filter material disposed inside the main body portion; and the main body while supporting the filter material A filter support portion detachably provided on the portion, and a ventilation member penetrating the filter material ,
The filter support portion includes a bottom portion and a top plate portion through which water can flow, and is a filter support portion that holds the filter material in the middle between the bottom portion and the top plate portion,
The drainage filter for a rainwater infiltration pipe , wherein the ventilation member is a ventilation member that penetrates the filter material while connecting the bottom portion and the top plate portion . The drainage filter for a rainwater permeation pipe according to claim 1, wherein the main body part is a main body part having a predetermined length dimension and mounted so as to extend from an upper end edge of the permeation pipe. The drainage filter for a rainwater permeation pipe according to claim 1 or 2 , wherein the main body part is a main body part having a permeation pipe connecting part at a lower part and a top plate holding part at an upper part. In the rainwater infiltration structure formed by opening the bottom of the street wall to which the sewage pipe is connected and arranging the infiltration pipe penetrating this opening in the ground,
A cylindrical main body portion that is attached to the upper end of the permeation tube and has perforation holes formed in a plurality of locations on the side wall; a filter material disposed inside the main body portion; and the main body while supporting the filter material A filter support part provided detachably on the part, and a ventilation member supported by the filter support part while penetrating the filter material,
The filter support portion includes a bottom portion and a top plate portion through which water can flow, and is a filter support portion that holds the filter material in the middle between the bottom portion and the top plate portion,
The ventilation member is divided into a lower projecting region projecting from the bottom portion, an upper projecting region projecting from the top plate portion, and an intermediate region connecting the bottom portion and the top plate portion while penetrating the filter material. A drainage filter for rainwater permeation pipes, wherein the drainage filter is a ventilation member. 5. The ventilation member according to claim 4, wherein the ventilation member is configured to have a length higher than an opening of a sewer pipe connected to the street at an upper end of the upper projecting region. The drainage filter for rainwater permeation pipes as described. The drainage for rainwater infiltration pipes according to any one of claims 1 to 5, wherein the top plate portion is a top plate portion in which a plurality of through holes for infiltration having a diameter larger than that of the infiltration holes are formed. filter.

Images