JP2012001973A - Drainage filter for rainwater permeation pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drainage filter capable of discharging rainwater stagnated in a sedimentation area.SOLUTION: A rainwater permeation structure body provided with a permeable pipe WP penetrating an opening at a bottom of a street gutter basin X comprises: a main body 1 which is attached to an upper end of the permeable pipe and has permeable holes 4 at a plurality positions on a side wall thereof; a filter member 2 which is placed inside the main body; and a filter support section 3 which supports the filter member and is detachably installed in the main body. The filter support section has a bottom plate 32, a top plate 31 and a column 33 to connect the bottom plate and the top plate. A filter member is held in a middle part between the bottom plate and the top plate.

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 main body portion having a perforation hole formed therein, a filter material disposed inside the main body portion, and a filter support portion detachably provided on the main body portion while supporting the filter material. The gist of the drainage filter for rainwater permeation pipes is a feature.

  According to the above configuration, the filter material is disposed inside the main body portion of the drainage filter, and the permeation hole is formed in the side wall of the main body portion. Rain water can flow into the tube. A large amount of rainwater will flow in from the upper end opening of the permeation tube, but rainwater can be gradually flowed in from the side wall of the main body as an alternative route. It can drain the rainwater that penetrates.

  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 substantially the opening position of the main body, and when the amount of rainwater reaching this position flows into the street, Rainwater will flow in. Therefore, a structure of a normal street, that is, a trap structure formed of sediments is formed. In addition, since the drainage filter body that forms the trap is provided with a permeation hole in its side wall, rainwater that permeates the sediment deposited in the sediment pool flows into the permeation pipe even when the water level is low. The Rukoto. 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 filter support portion includes a bottom plate, a top plate, and a support column connecting the bottom plate and the top plate, and the filter material can be held between the bottom plate and the top plate. .

  According to the above configuration, the filter material supported by the filter support portion is held between the top plate and the bottom plate. Therefore, the size of the filter material can be increased by changing the distance between the top plate and the bottom plate. Can be changed. Further, the filter material can be replaced by detaching the bottom plate from the support column.

  Furthermore, the said structure WHEREIN: It is preferable that the said baseplate is arrange | positioned near the lower end of the said main body, and the said top plate is arrange | positioned near the upper end of the said main-body part.

  According to the said structure, the filter material arrange | positioned in the middle of a top plate and a baseplate will be filled inside a main-body part side wall, and the waste_water | drain which passes an osmosis | permeation hole will pass through a filter material.

  Further, 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 main body portion attached to the upper end of the infiltration pipe, A drainage filter for a rainwater infiltration pipe, comprising: a filter material disposed inside the main body portion; and a filter support portion mounted on the main body portion while supporting the filter material, wherein the filter support portion includes a bottom plate And a top plate, and a column that connects the bottom plate and the top plate, and the main body includes an osmotic tube connecting portion that can be connected to an edge of the osmotic tube, a substantially cylindrical body, and the body And a top plate holding portion for holding the top plate of the filter support portion. The top plate of the filter support portion is formed by the top plate holding portion of the main body portion. When held, the support of the filter support is the filter material and bottom plate That it is arranged in a body portion while suspended from the gist of the drainage filter rainwater penetration tube according to claim.

  According to the said structure, the main-body part of a drainage filter will be mounted | worn with the said rainwater permeation pipe | tube by connecting an osmosis | permeation pipe | tube connection part with the upper end of a rainwater permeation pipe | tube. Further, by holding the top plate constituting the filter support portion by the top plate holding portion of the main body portion, the support column is suspended from the top plate, and the bottom plate connected to the tip is suspended. At that time, the filter material disposed between the top plate and the bottom plate is suspended below the top plate while its weight is supported by the bottom plate. Therefore, in order to take out the filter material, by pulling up the filter support portion, that is, by detaching the top plate from the top plate holding portion, the column hanging from the top plate and the filter material and the bottom plate suspended by this column Can be pulled out. Thereby, the filter material hold | maintained at the filter support part taken out from the main-body part can be replaced | exchanged outside the said main-body part.

  In the above invention, the body portion of the main body is configured in a cylindrical shape having the same inner diameter as that of the permeation tube, and has a predetermined length dimension so as to extend the permeation tube. .

  According to the said structure, the trunk | drum of a main-body part will extend an infiltration pipe | tube by attaching a main-body part to an infiltration pipe | tube. At this time, since the trunk portion has a predetermined length dimension, extension corresponding to the length dimension of the trunk portion is possible. Accordingly, the main body can be opened at a predetermined height from the bottom of the street mast, and a trap structure can be formed in the street mast. Further, since the body portion is provided with the permeation holes, the number or size of the permeation holes can be adjusted according to the predetermined length.

  In each of the above inventions, the permeation hole is constituted by a long hole that is long in one direction, and the longitudinal direction of the long hole is a vertical direction when the main body is attached to the permeation tube. can do.

  According to the above configuration, since the main body portion attached to the permeation pipe is formed with a long hole in the vertical direction, the rainwater stagnating in the sediment in the street is at the water level. It will be able to pass through the penetration hole regardless of the height. Further, when the main body (or the body) has a predetermined length dimension, the length dimension in the longitudinal direction of the permeation hole can be changed according to the length dimension. The level of rainwater that can stagnate in the streets depends on the length of the main body, so if the length of the main body (or trunk) increases, By increasing the dimension in the longitudinal direction, rainwater stagnating at a high water level can be discharged.

  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.

It is a disassembled perspective view which shows embodiment of this invention. It is a disassembled perspective view which shows embodiment of this invention. It is explanatory drawing which shows the installation state of embodiment. It is IV-IV sectional drawing. It is explanatory drawing which shows the use condition of embodiment. It is explanatory drawing which shows the use condition of embodiment. It is explanatory drawing 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, 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 a filter that supports the filter material 2 It is comprised with the support part 3. FIG.

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

  The trunk portion 12 is formed in a cylindrical shape having a smaller diameter than the permeation tube coupling portion 11 and is configured to have a predetermined length dimension in the axial direction. Further, a through hole 4 (which is referred to as a permeation hole) that is long in the axial direction of the body 12 is formed in the side wall of the body 12. A plurality of the permeation holes 4 are provided so as to be scattered around the entire circumference of the body portion 12 and are formed at predetermined intervals in the circumferential direction. Further, the lower end edge 41 of the permeation hole 4 is provided close to the permeation pipe connecting portion 11 and is provided so as to penetrate below the trunk portion 12. The upper end edge 42 of the permeation hole 4 is close to the upper end portion 13 and penetrates within a predetermined length range of the body portion 12.

  The upper end portion 13 is formed in a cylindrical shape having a larger diameter than the body portion 12, and a receiving surface 14 is configured by forming a boundary portion with the body portion 12 in a bowl shape. An edge of a top plate portion 31 of the filter support portion 3 to be described later can come into contact with the receiving surface 14, and a top plate that holds the top plate by the receiving surface and the large-diameter upper end portion 13. A holding part is formed.

  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, a through hole 23 extending from the upper surface 21 to the bottom surface 22 is provided at the center of the filter material 2 so that a column 33 of the filter support portion 3 described later can be inserted.

  The filter support unit 3 includes a top plate 31, a bottom plate 32, and a support 33. The top plate 31 contacts the upper surface 21 of the filter material 2, and the bottom plate 32 contacts the bottom surface 22 of the filter material 2, The filter material 2 is held between the both 31 and 32.

  The top plate 31 is provided with a large hole 34 through which rainwater can sufficiently pass, and a through hole 35 through which the support column 33 can be inserted is provided at the center. The bottom plate 32 is formed in a circular flat plate shape, and an infinite number of fine through holes 36 are formed on the entire surface. The through-hole 36 has an effect of eliminating the material constituting the filter material from being separated and mixed into the rainwater, in addition to the purpose of removing soil and the like mixed into the rainwater. However, in order to allow rainwater to pass sufficiently, a large number of through holes 36 are dispersed throughout. A through hole 37 through which the support 33 can be inserted is also formed in the center of the bottom plate 32.

  The column 33 passes through the through hole 35 of the top plate 31 and the through hole 37 of the bottom plate 32 and fixes the bottom plate 32 at the tip 38 thereof. In order to fix the bottom plate 32, a male screw is engraved at the tip 38 of the column 33, and a nut or the like (for example, a thumbscrew) 39 disposed on the bottom surface side of the bottom plate 32 is used. The bottom plate 32 is prevented from being detached from the column 33 by the screwing of the thumbscrew 39. The grip portion 5 is provided on the top plate side of the support column 33, and the top plate 31 cannot be detached from the support column 33 by the base portion 51 of the grip portion 5 coming into contact with the upper surface of the top plate 31. .

  Thus, in a situation where the top plate 31 and the bottom plate 32 cannot be detached from the support column 33, the filter material 2 is disposed between the top plate 31 and the bottom plate 32, so that the filter material is attached to the top plate 32 and the bottom plate 32. It will be held at.

  FIG. 2 shows a state in which the main body 1 is attached to the permeation tube WP and the filter material 2 is held by the filter support 3. As shown in this figure, the main body 1 attached to the permeation tube WP is in a state in which the permeation tube WP is extended, and the opening of the tube (the whole of the permeation tube WP and the main body 1 is integrated). The position of PO is positioned 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.

  Moreover, the filter support part 3 shown by the figure hold | maintains the filter material 2 in the middle of the top plate 31 and the bottom plate 32. FIG. At this time, the top plate 31 is configured to have a larger diameter than the filter material 2 and the bottom plate 32, so that the filter material 2 and the bottom plate 32 are accommodated in the body portion 12 of the main body 1. It will be supported in the state which contact | abutted to the receiving surface 14 of the part 1. FIG. As described above, when the top plate 31 is supported by the receiving surface 14, the support column 33 is suspended from the top plate 31, and the filter material 2 and the bottom plate 32 supported by the support column 33 are suspended from the support column 33. It becomes a state to become. That is, the filter material 2 and the filter support portion 3 can be detached from the main body portion 1 only by pulling upward. The gripping part 5 is used for pulling up at this time. In addition, when the dimension of the height direction (vertical direction) of the filter material 2 is different, it is possible to hold the filter material 2 by the bottom plate 32 and the top plate 31 by adjusting the position of the bottom plate 32, Further, the position of the filter material 2 and the position of the bottom plate 32 are adjusted by the position where the top plate 31 is supported and the length of the support column 33.

  3 and 4 show a state in which the filter support portion 3 that holds the filter material 2 is attached to the main body portion 1. FIG. As shown in this figure, the top plate 31 of the filter support portion 3 is held in a state of being in contact with the receiving surface 14 of the main body portion 1 described above. The receiving surface 14 positions the filter support portion 3 in the height direction (vertical direction). However, as shown in the drawing, the upper end portion 13 of the main body portion 1 surrounds the periphery of the top plate 31, and thus the horizontal position. Is confirmed. In this way, the top plate 31 is held by the upper end portion 13 and the receiving surface 14.

  Further, in this state, the large through hole 34 provided in the top plate 31 has a space equivalent to the inner diameter of the permeation tube WP when the through areas are combined. Accordingly, a drainage amount comparable to that in a state where the normal permeation pipe WP is open is secured. Further, the filter material 2 exists immediately below the through hole 34, and the drained water can be filtered by the filter material 2.

  Further, the body portion 12 of the main body portion 1 forms a tubular body so as to extend the permeation tube WP, and the permeation hole 4 is provided on the side wall, so that appropriate drainage is possible from the permeation hole 4. Yes. Here, since the filter material 2 is disposed inside the body portion 12, the inflowing waste water can be filtered by the filter material 2.

  In addition, although this penetration hole 4 is shown in figure so that it may penetrate largely for convenience of explanation, the magnitude | size of this penetration hole 4 can be changed suitably, and makes it a slit shape long in the perpendicular direction. It may be configured. In addition, the filter material 2 is configured to have a substantially T-shaped vertical cross-section (see FIG. 4). In such a configuration, the upper portion of the filter material 2 is partially partially formed. The overhanging portion is installed so as to abut against the receiving surface 14 of the main body 1, but is not limited to such a shape, and is configured in a cylindrical shape so as not to abut on the receiving surface 14. Also good.

  Since the present embodiment is as described above, when it is installed at the upper end of the permeation pipe WP provided on the street, it can be a street-type structure having a puddle.

  That is, as shown in FIG. 5, the bottom of the city street X is opened, and the upper end of the permeation pipe WP installed there is located near the bottom of the city street X. By connecting the filter F of the present embodiment to the upper end edge of X, the permeation tube WP is extended upward, and its open end is located at a predetermined height H1 from the bottom of the street X. It will be. Therefore, when the water level of the rainwater flowing into the city street X exceeds the predetermined height H1, it is drained from the upper end opening of the filter F to the permeation pipe WP. On the contrary, when the rainwater level is lower than the predetermined height H1, the water is not drained from the upper end opening of the filter F (inflow from the permeation hole 4 is possible but is not considered here). Suppose). Thus, a trap is formed by attaching the filter F, and the trap structure is constituted by this trap structure.

  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 pattern as shown in FIG. 5, the opening of the sewer pipe UP is provided above the height H1 of the upper end of the filter F. This is a so-called base cut method, and is drained to the permeation pipe WP first at a water level exceeding the height of the upper end of the filter F, but a larger amount of rainwater than the drainage amount to the permeation pipe WP When it gradually flows into X and the water level rises, it is also drained into the sewer pipe UP. In addition to the form shown in this figure, when the so-called peak cut method is used, the opening height H2 of the sewer pipe UP is adjusted to be lower than the opening height H1 of the 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.

  Therefore, in the above-mentioned usage pattern, when the earth and sand flows into the sand basin of 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 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 4 is formed in the main body 1 of the filter F, rainwater that has permeated the sediment TR accumulated in the sediment reservoir can be 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, the rainwater that has reached the permeation hole 4 that opens opens the permeation hole 4 and flows into the permeation pipe WP. As a matter of course, the permeation hole 4 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 (see FIG. 4), it is possible to prevent foreign matter from entering 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 more than about, it will move between the stones and sand grains of the sedimentary sediment TR and move to the bottom of the street X. In other words, it is discharged from the permeation hole 4 provided in 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, when the rainwater that has flowed into the street wall X is discharged to the permeation pipe WP, the rainwater can be filtered by the filter F. 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 material 2 is formed by molding a fibrous or porous material into a predetermined shape. However, the filter material 2 may be formed of a non-molded product. In this case, as shown in FIG. 7A, for example, a saddle member 20 made of a wire mesh material or the like is held between the top plate 31 and the bottom plate 32 constituting the filter support portion 3, and the saddle member 20 The filter material 3 may be sealed inside.

  Moreover, as shown in this figure, the top plate 31 can be configured to be screwed with the upper end portion 13 of the main body 1. In this case, a male screw 31 a is engraved on the outer peripheral surface of the top plate 31, and a female screw 13 a is engraved on the inner surface of the upper end 13 of the main body 1, thereby providing the upper end 13 of the main body 1. By screwing the male screw 31a of the top plate 31 into the female screw 13a, the both can be screwed together. In such a configuration, since the filter support portion 3 is integrated with the main body portion 1, a large amount of rainwater flows into the street wall X, and the filter 2 and the filter support portion 3 are lifted by the buoyancy. Further, it is possible to prevent the situation where both of them are separated by the flow velocity generated by the rapid inflow into the sewer pipe UP.

  Further, as shown in FIG. 7B, when a pipe having a configuration in which a male screw WPa is engraved on the outer peripheral surface near the upper end of the permeation pipe WP is used, the inner circumference of the lower end 11 of the main body 1 is used. If the female screw 11a screwed with the male screw WPa is formed on the surface, the permeation tube WP and the main body 1 can be screwed together. With such a configuration, both can be easily integrated, and even when an adhesive cannot be used, a strong mounting state can be realized.

  Further, the penetration hole 4 of the above embodiment is constituted by a long hole, but is not limited to the long hole, and a plurality of round holes are formed in a predetermined range of the body portion 12 of the main body 1. May be. In this case, it is preferable that the round holes are scattered in the height direction (vertical direction) in a range (see FIG. 1) where the lower end edge 41 and the upper end edge 42 of the permeation hole 4 are long holes. As described above, since the round holes are scattered in the height direction (vertical direction), it can be appropriately discharged according to the amount of rainwater stagnating in the street.

DESCRIPTION OF SYMBOLS 1 Main body part 2 Filter material 3 Filter support part 4 Penetration hole 5 Grasp part 11 Permeation pipe | tube connection part (lower end part of a main-body part)
DESCRIPTION OF SYMBOLS 12 Body part 13 Body upper part 14 Body part receiving part 21 Filter material upper surface 22 Filter material lower surface 31 Top plate 32 Bottom plate 33 Column 39 Thumb screw 41 Bottom edge of penetration hole 42 Upper edge of penetration hole F Filter TR sedimentary sediment UP Sewer pipe WP Osmosis pipe X

Claims (7)

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 main body portion that is attached to the upper end of the permeation tube and has permeation holes drilled at a plurality of locations on the side wall; a filter material disposed inside the main body portion; A drainage filter for a rainwater permeation pipe, comprising a filter support portion that can be provided. 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 filter support portion includes a bottom plate, a top plate, and a support column connecting the bottom plate and the top plate, and a filter material is held between the bottom plate and the top plate. The drainage filter for rainwater permeation pipes according to 2. The drainage filter for a rainwater infiltration pipe according to claim 3, wherein the bottom plate is disposed in the vicinity of the lower end of the main body, and the top plate is disposed in the vicinity of the upper end of the main body portion. 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 rainwater permeation pipe comprising a main body part attached to the upper end of the permeation pipe, a filter material disposed inside the main body part, and a filter support part attached to the main body part while supporting the filter material A drainage filter,
The filter support portion includes a bottom plate, a top plate, and a support column connecting the bottom plate and the top plate,
The main body includes an osmotic tube connecting portion that can be connected to an edge of the osmotic tube, a substantially cylindrical body portion, permeation holes formed in a plurality of locations on the side wall of the body portion, and the filter support portion A top plate holding part for holding the top plate,
When the top plate of the filter support portion is held by the top plate holding portion of the main body portion, the column of the filter support portion is arranged in the main body portion while suspending the filter material and the bottom plate. Drainage filter for rainwater infiltration pipe. The trunk portion of the main body portion is configured as a cylindrical shape having the same inner diameter as the permeation tube, and has a predetermined length and extends the permeation tube. The drainage filter for rainwater permeation pipes according to 1. The permeation hole is configured as a long hole that is long in one direction, and when the main body is attached to the permeation tube, the permeation hole is configured such that a longitudinal direction of the long hole is a vertical direction. Item 7. A drainage filter for rainwater permeation pipes according to any one of Items 1 to 6.

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