JP6260306B2 - Rainwater infiltration pipe and rainwater infiltration system using the same - Google Patents

Description

  The present invention relates to a rainwater infiltration pipe and a rainwater infiltration system using the same.

  In recent years, damage caused by so-called guerrilla heavy rain has increased. In particular, the amount of rainwater stored in urban areas and the amount of seepage into the ground have decreased, and a large amount of rainwater tends to flow into rivers in a short time. As a result, urban flood damage has caused serious damage. In order to prevent inundation damage due to heavy rain, it is necessary to store and infiltrate rainwater underground. As a technique for infiltrating rainwater into the ground, for example, there is a rainwater mass system (see, for example, Patent Document 1).

  In this rainwater mass system, a plurality of connection ports are formed at the upper and lower positions of the circumferential wall of the cylindrical mass, and a plurality of laterally extending water pipes are connected to the respective connection ports, so that a plurality of pipes are formed on the peripheral wall of the lower water pipe. The drainage hole is formed. In this rainwater mass system, when the flow rate of rainwater is low and the water level of the trough is low, rainwater flows only through the lower water pipe, draining the rainwater from the drainage hole and penetrating it into the ground. When the flow rate increases and the water level of the trout rises, rainwater is drained into the drainage channel by flowing rainwater through the upper water pipe in addition to the lower water pipe.

Japanese Patent No. 3871397

  Since the above rainwater mass system has an upper water pipe and a lower water pipe separately, the number of parts is large and the product cost increases. In addition, construction is troublesome because there are many connecting points to the mass. In addition, since the upper water pipe and the lower water pipe are separated, there are many gaps between them that are difficult to backfill, and the construction is troublesome also in this respect.

  An object of the present invention is to provide a rainwater permeation pipe capable of reducing product costs and improving workability and a rainwater permeation system using the same.

  In order to achieve the above object, the rainwater infiltration pipe of the present invention has one end connected to the introduction-side rainwater mass connected to the rainwater introduction line and the other end connected to the discharge-side rainwater mass connected to the rainwater discharge line. An upper flow path forming portion that forms an upper flow path for communicating the introduction-side rainwater mass and the discharge-side rainwater mass, and the introduction-side rainwater mass below the upper flow path. A lower flow path forming portion that forms a lower flow path that communicates with the discharge-side rainwater mass is integrally formed by extrusion molding, and the lower flow path is communicated to the outside of the pipe on the peripheral wall of the lower flow path forming portion. A drainage hole is formed.

  Thus, an upper flow path forming part that forms an upper flow path that communicates the introduction-side rainwater mass and the discharge-side rainwater mass, and a lower part that forms a lower flow path that communicates the introduction-side rainwater mass and the discharge-side rainwater mass. Since the flow path forming part is integrally formed by extrusion, the number of parts is reduced. Therefore, the product cost can be reduced. Further, since the number of parts is reduced, the connection to the introduction-side rainwater mass and the drainage-side rainwater mass is facilitated, and the construction is facilitated. In addition, since the upper flow path forming portion and the lower flow path forming portion are integrally formed, there are few gaps between them that are difficult to backfill, and the construction is easy from this point.

  The lower flow path forming section may have a divided partition wall that divides the lower flow path into a plurality of divided flow paths that are each communicated to the outside of the pipe by the individual drain holes. If comprised in this way, it can divide | segment into a some division | segmentation flow path and can flow rainwater, As a result, the flow of rainwater in a pipe | tube can be stabilized. Therefore, rainwater can be smoothly drained from each drain hole to the outside of the pipe, that is, into the ground. Moreover, since the load bearing performance can be improved by the divided partition wall, deformation or breakage due to the load received from the ground side can be suppressed.

  The plurality of divided flow paths may be arranged stepwise in the vertical direction, and the flow path area may be smaller toward the lower stage. If comprised in this way, compared with the case where a flow-path area is equal, when flow volume increases, in addition to a lower division | segmentation flow path, rainwater can be immediately poured into an upper division | segmentation flow path. Therefore, when the flow rate increases, rainwater can be drained from more drainage holes immediately outside the pipe, that is, into the ground.

  The lower flow path forming portion may have the drainage hole formed in the peripheral wall over the entire length, and the peripheral wall divided by the drainage hole may be connected by the divided partition wall. If comprised in this way, a drain hole can be easily formed by extrusion molding. Therefore, the product cost can be further reduced.

  The outer channel portion is formed in a cylindrical shape by an outer cylinder portion having an elliptical cross section whose height is greater than the width, and an upper portion of the outer cylinder portion formed in the outer cylinder portion, and the outer cylinder portion And an inner partition wall that forms the lower flow path forming portion with the middle portion and the lower portion. If comprised in this way, the moldability of extrusion molding will improve. Moreover, since it is a shape which has the outer cylinder part which makes cross-sectional oval shape whose height is larger than a width | variety, it can be easily backfilled so that there may be no space | gap around it, and construction will become still easier.

  The rainwater infiltration system of the present invention includes the rainwater infiltration pipe, an introduction-side rainwater mass connected to one end of the rainwater infiltration pipe, a discharge-side rainwater mass connected to the other end of the rainwater infiltration pipe, and the introduction side. A rainwater introduction line connected to the rainwater mass, and a rainwater discharge line connected to the discharge-side rainwater mass.

  An upper flow path forming section that forms an upper flow path that connects the introduction-side rainwater mass and the discharge-side rainwater mass, and a lower flow path that connects the introduction-side rainwater mass and the discharge-side rainwater mass are formed in the rainwater infiltration pipe. Since the lower flow path forming part is integrally formed by extrusion, the number of parts is reduced. Therefore, the product cost can be reduced. Moreover, the connection to the introduction-side rainwater mass and drainage-side rainwater mass of the rainwater permeation pipe becomes easy, and the construction becomes easy. Further, since the rainwater permeation pipe is integrally formed with the upper flow path forming portion and the lower flow path forming portion, backfilling around the rainwater permeation pipe is facilitated, and the construction is also facilitated from this point.

  According to the present invention, the product cost can be reduced and the workability can be improved.

It is a side view showing the rainwater penetration pipe and rainwater penetration system concerning a 1st embodiment of the present invention. It is a front view which shows the rainwater penetration pipe | tube which concerns on 1st Embodiment of this invention. It is a front view which shows the rainwater penetration pipe | tube which concerns on 2nd Embodiment of this invention. It is a side view which shows the rainwater penetration pipe and rainwater penetration system which concern on 3rd Embodiment of this invention.

  Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2.

  FIG. 1 shows a basic configuration of a rainwater infiltration system 10 according to the first embodiment. The rainwater infiltration system 10 includes a rainwater infiltration pipe 11, a rainwater mass 12 (introduction-side rainwater mass) connected to one end of the rainwater infiltration pipe 11 in the rainwater flow direction upstream, that is, the rainwater introduction side, and the rainwater mass 12. Connected to the upstream side of the rainwater flow direction, that is, a part of the rainwater introduction line connected to the rainwater introduction side, and the other end of the rainwater permeation pipe 11 on the downstream side of the rainwater flow direction, that is, the rainwater discharge side. The rainwater mass 14 (discharge-side rainwater mass) and a pipe 15 (rainwater discharge line) connected to the rainwater flow direction downstream side of the rainwater, that is, the rainwater discharge side, are provided.

  The pipe 13 on the rainwater introduction side when viewed from the rainwater penetration pipe 11 is connected to a rainwater source such as a rain gutter of the building or another rainwater mass on the rainwater source side, for example, and the rainwater discharge is seen from the rainwater penetration pipe 11. The pipe 15 on the side is connected to a rainwater discharge destination such as a gutter on the road or other rainwater mass on the rainwater discharge destination side.

  The rainwater mass 12 on the introduction side and the rainwater mass 14 on the discharge side are embedded in the underground UG so that a part of the rainwater mass 14 protrudes upward from the ground surface GL. It is horizontally arranged and embedded in the underground UG so as to be located below the surface GL. Further, the pipe 13 and the pipe 15 are also embedded in the underground UG so as to be located below the ground surface GL.

  The rainwater mass 12 on the introduction side has a bottomed cylindrical shape, the rainwater mass body 22 buried in the ground with the bottom 21 facing down, a lid body 24 that closes the upper end opening 23 of the rainwater mass body 22, and rainwater And a filter 25 provided in the mass body 22. The lid 24 and the filter 25 are detachable from the rainwater mass body 22.

  The rainwater mass body 22 has an attachment hole 27 formed in the upper portion of one side wall portion 26 so as to penetrate the side wall portion 26, and the other side wall portion 28 is provided with the side wall portion 28 at an intermediate portion in the vertical direction. A connecting hole 29 is formed so as to penetrate therethrough. The attachment hole 27 is a circular hole, and the connection hole 29 is a long hole that is long in the vertical direction. The filter 25 is located below the mounting hole 27 and is arranged so as to partition the rainwater mass body 22 vertically.

  The discharge-side rainwater mass 14 has a bottomed cylindrical shape and has a rainwater mass main body 32 embedded in the ground with the bottom 31 facing down, and a lid 34 that closes the upper end opening 33 of the rainwater mass main body 32. doing. The lid 34 is detachable from the rainwater mass body 32.

  In the rainwater mass body 32, an attachment hole 37 is formed in the upper part of one side wall portion 36 so as to penetrate the side wall portion 36, and the other side wall portion 38 is provided with the side wall portion 38 at an intermediate portion in the vertical direction. A connecting hole 39 is formed so as to penetrate therethrough. The attachment hole 37 is a circular hole, and the connection hole 39 is a long hole that is long in the vertical direction. The rainwater mass bodies 22 and 32 and the lid bodies 24 and 34 are made of, for example, synthetic resin, and the filter 25 is made of, for example, metal.

  The rainwater mass 12 and the rainwater mass 14 are opposed to each other with their connecting holes 29 and 39 matched in height. Then, one end of the rainwater penetration pipe 11 in the lengthwise direction is connected to the connection hole 29 of the rainwater mass 12 in a fitted state, and the other end of the rainwater penetration pipe 11 is fitted in the lengthwise direction of the rainwater penetration pipe 11. Linked in state. The connecting holes 29 and 39 have a long hole shape that is long in the vertical direction. In accordance with this, the rainwater permeation pipe 11 has an oval cross-sectional shape whose height is larger than the width. Around the connection hole 29 of the rainwater mass body 22, a flange 41 for facilitating the fitting of the rainwater permeation pipe 11 and ensuring the connection strength is formed. Also, a similar flange 42 is formed.

  In addition, the pipe 13 is connected to the attachment hole 27 of the rainwater mass 12 in a fitted state, and the pipe 15 is connected to the attachment hole 37 of the rainwater mass 14 in a fitted state. A flange 43 is formed around the attachment hole 27 of the rainwater mass body 22 for facilitating fitting of the pipe 13 and ensuring connection strength, and also around the attachment hole 37 of the rainwater mass body 32. A similar flange 44 is formed. Since the mounting holes 27 and 37 are circular holes, the pipes 13 and 15 have a cylindrical shape, and are specifically made of general-purpose resin pipes such as vinyl chloride.

  As shown in FIG. 2, the rainwater infiltration pipe 11 has an outer cylinder portion 51 that constitutes an outer portion thereof. The outer cylinder portion 51 has an oval cross section whose height is larger than the width. That is, the outer cylinder portion 51 connects the upper semi-cylindrical portion 52 having a shape obtained by cutting a cylinder along a plane including an axis, and the lower semi-cylindrical portion 53 having a shape obtained by cutting the cylinder along a plane including an axis. A pair of flat plate portions 54 and 55 is provided. The semi-cylindrical parts 52 and 53 are arranged so as to bulge in opposite directions, and one flat plate part 54 connects the opposite end edges of the semi-cylindrical part 52 and the semi-cylindrical part 53 to each other. The flat plate portion 55 connects the opposite end edges of the semi-cylindrical portion 52 and the semi-cylindrical portion 53.

  The rainwater infiltration pipe 11 has an internal partition wall 61 formed inside the outer cylinder portion 51. The internal partition wall 61 has a shape obtained by cutting a cylinder along a plane including an axis, and is formed in a cylindrical shape with the semi-cylindrical portion 52 on the upper portion of the outer cylindrical portion 51. The inside of the cylindrical portion formed by the semicylindrical portion 52 and the internal partition wall 61 is an upper flow path 62 that penetrates in the length direction at the upper portion of the rainwater permeation pipe 11. The wall 61 forms an upper flow path forming portion 63 that forms the upper flow path 62. In other words, the inner partition wall 61 forms the upper flow path forming part 63 in a cylindrical shape with the semi-cylindrical part 52 on the upper part of the outer cylindrical part 51.

  Further, the inner partition wall 61 forms a cylindrical peripheral wall 65 with a pair of flat plate portions 54 and 55 at an intermediate portion in the vertical direction of the outer cylinder portion 51 and a semi-cylindrical portion 53 below the outer cylinder portion 51. . The inner side of the peripheral wall 65 is a lower flow channel 66 penetrating in the length direction below the rainwater permeation pipe 11, that is, below the upper flow channel 62, and thus the peripheral wall 65 forms a lower flow that forms the lower flow channel 66. A part of the path forming portion 67 is configured. The internal partition wall 61 constituting a part of the lower flow path forming part 67 also constitutes a part of the upper flow path forming part 63 as described above.

  The lower flow path forming part 67 divides the lower flow path 66 into a plurality of divided flow paths 71, 72, 73, 74 inside the peripheral wall 65, and a divided partition wall 75 along the vertical direction and a divided partition along the horizontal direction. A wall 76 is provided. The dividing partition wall 75 connects the center position in the width direction of the inner partition wall 61 and the center position in the width direction of the semi-cylindrical portion 53, and is formed over the entire length of the rainwater infiltration pipe 11. The partition wall 76 connects the boundary position between the flat plate portion 54 and the semi-cylindrical portion 53 in the width direction and the boundary position between the flat plate portion 55 and the semi-cylindrical portion 53 in the other width direction. Is formed over the entire length.

  A divided flow path 71 is formed inside the half cylindrical portion 53 on one side in the width direction and the divided partition walls 75 and 76, and the other side in the width direction of the semi-cylindrical portion 53 and the divided partition walls 75 and 76 on the other side. A divided flow path 72 is formed inside these. In addition, a divided flow path 73 is formed on the inner side of the flat plate portion 54 and the inner partition wall 61 on the same side as the divided partition walls 75 and 76, and the flat plate portion 55 and the inner partition wall 61. A divided flow path 74 is formed on the inner side of the portion on the same side and the divided partition walls 75 and 76. Therefore, the divided flow paths 71 and 72 are arranged in the lower stage, and the divided flow paths 73 and 74 are arranged in the upper stage. The divided flow paths 71 and 72 have the same flow area. The divided flow paths 73 and 74 have the same flow area, and the flow areas are larger than the divided flow paths 71 and 72. That is, the plurality of divided flow paths 71 to 74 are arranged in a step shape in the vertical direction, and the flow path area is smaller toward the lower level.

  Drain holes 81, 82, 83, 84 are formed in the peripheral wall 65 of the lower flow path forming portion 67 to allow the lower flow path 66 to communicate with the outside of the pipe. Specifically, a drain hole 81 is formed on one side in the width direction of the semi-cylindrical portion 53 of the peripheral wall 65, and this drain hole 81 communicates the divided flow path 71 outside the pipe. Further, a drain hole 82 is formed on the other side in the width direction of the semi-cylindrical portion 53 of the peripheral wall 65, and the drain hole 82 communicates the divided flow path 72 outside the pipe. Further, a drain hole 83 is formed in the flat plate portion 54 on one side in the width direction, and the drain hole 83 communicates the divided flow path 73 outside the pipe. Further, a drain hole 84 is formed in the flat plate portion 55 on the other side in the width direction, and this drain hole 84 communicates the divided flow path 74 outside the pipe. Therefore, each of the divided flow paths 71 to 74 is communicated with the outside of the pipe by one of the drain holes 81 to 84 that individually correspond to each other.

  Here, the drain holes 81 to 84 are all formed in a slit shape in the peripheral wall 65 over the entire length thereof. In other words, the drain holes 81 to 84 all penetrate the peripheral wall 65 in the length direction. Since the drain holes 81 to 84 are formed, the peripheral wall 65 is divided into a divided wall portion 90 between the drain holes 81 and 82, a divided wall portion 91 between the drain holes 81 and 83, and a partition between the drain holes 82 and 84. The wall 92 is divided into a partition wall 93 between the drain holes 83 and 84. That is, the dividing wall portion 90 is formed of a part of the semi-cylindrical portion 53, the dividing wall portion 91 is formed of a portion of the semi-cylindrical portion 53 and the flat plate portion 54, and the dividing wall portion 92 is formed of the semi-cylindrical portion 53 and the flat plate portion 55. The partition wall portion 93 is composed of a part of the flat plate portions 54 and 55 and the entire inner partition wall 61.

  These divided partition wall portions 90 to 93 are all connected by divided partition walls 75 and 76. That is, the dividing wall portion 90 is connected to the dividing wall portion 93 by the dividing partition wall 75, the dividing wall portions 91 and 92 are connected to each other by the dividing partition wall 76, and further, the dividing wall portion 90, 93.

  The rainwater permeation tube 11 described above has a constant cross section perpendicular to the length direction over the entire length in the length direction, and is integrally formed by extrusion. That is, in the rainwater infiltration pipe 11, the upper flow path forming portion 63 and the lower flow path forming portion 67 are integrally formed by extrusion molding, and drain holes 81 to 84 are also formed at the time of this extrusion molding. The upper flow path forming portion 63 is not formed with drain holes that allow the upper flow path 62 to communicate with the outside of the pipe except for openings at both ends in the length direction. The rainwater permeation pipe 11 is made of a resin such as vinyl chloride, polyethylene, polypropylene, or ABS.

  As shown in FIG. 1, the rainwater permeation pipe 11 has one end in the length direction connected to the connection hole 29 of the rainwater mass 12 and the other end in the length direction connected to the connection hole 39 of the rainwater mass 14. . As a result, the divided flow paths 71 to 74 and the upper flow path 62 constituting the lower flow path 66 shown in FIG. 2 allow the rainwater mass 12 and the rainwater mass 14 to communicate with each other. The pipe 13 and the pipe 15 are communicated with each other.

  A filter (not shown) that can pass water and restricts passage of earth and sand is attached to the outer surface of the rainwater infiltration pipe 11 so as to cover the drain holes 81 to 84. In other words, the filter allows drainage from the rainwater penetration pipe 11 to the outside through the drainage holes 81 to 84, while allowing the filter to enter the inside of the rainwater penetration pipe 11 through the drainage holes 81 to 84 such as earth and sand. regulate. The filter is made of, for example, a nonwoven fabric or a mesh (net).

  When constructing the rainwater infiltration system 10, a groove is excavated from the ground surface GL in the underground UG, and the rainwater infiltration system 10 is disposed in the groove to refill the groove. At that time, the periphery of the rainwater permeation pipe 11 is backfilled with the crushed stone S, and thus the rainwater permeation system 10 in the construction state is in a state where the periphery of the rainwater permeation pipe 11 is surrounded by the crushed stone S. .

  In the first embodiment described above, for example, after rainwater flows from the rainwater source side such as a rain gutter of a building through the pipe 13 and is introduced into the rainwater mass 12, and garbage is captured by the filter 25, Accumulate from the bottom 21 side. When the water level in the rainwater mass 12 becomes higher than the upper surface of the lower end portion of the semi-cylindrical portion 53 of the rainwater permeation pipe 11, the rainwater passes from the rainwater mass 12 through the divided flow paths 71 and 72 of the rainwater permeation pipe 11. Flows to the side. When the rainwater level in the divided flow paths 71 and 72 is higher than the height of the drain holes 81 and 82, the rainwater is discharged from the drain holes 81 and 82 to the outside of the rainwater infiltration pipe 11 and passes through the gap between the crushed stones S. It penetrates underground UG.

  Further, if rainwater accumulates in the rainwater mass 12 at a flow rate that exceeds the discharge flow rate from the drain holes 81 and 82, the water level rises even during drainage from the drain holes 81 and 82, and the water level is divided into the rainwater permeation pipes 11. When the height is higher than the upper surface of the partition wall 76, rainwater flows from the rainwater mass 12 through the divided flow paths 71 to 74 of the rainwater permeation pipe 11 to the rainwater mass 14 side. When the rainwater level in the divided flow paths 73 and 74 is higher than the height of the drainage holes 83 and 84, the rainwater is also discharged from the drainage holes 83 and 84 to the outside of the rainwater permeation pipe 11 and passes through the gap between the crushed stones S. It penetrates underground UG.

  Furthermore, if rainwater accumulates in the rainwater mass 12 at a flow rate that exceeds the discharge flow rate from the drain holes 81 to 84, the water level rises even during drainage from the drain holes 81 to 84, and the water level is inside the rainwater infiltration pipe 11. If it becomes higher than the upper surface of the lower end part of the partition wall 61, rain water will pass through the upper flow path 62 of the rain water penetration pipe | tube 11 in addition to the division flow paths 71-74, and will flow to the rain water mass 14 side. When the rainwater level further rises and the water level on the rainwater mass 14 side becomes higher than the upper surface of the lower end portion of the pipe 15, the rainwater flows through the pipe 15 to the rainwater discharge destination side such as a side ditch of the road.

  As described above, in the first embodiment, rainwater is discharged from the drainage holes 81 and 82 or the drainage holes 81 to 84 to the outside of the rainwater permeation pipe 11 and permeated into the underground UG through the gaps of the crushed stone S. As a result, the amount of water flowing to the rainwater discharge destination such as a gutter on the road is reduced. Maintenance such as cleaning of the rainwater masses 12 and 14 is performed through the upper openings 23 and 33 with the lids 24 and 34 removed. At that time, if necessary, the filter 25 is removed and the captured dust is removed.

  The rainwater permeation pipe 11 described above includes an upper flow path forming portion 63 that forms an upper flow path 62 that allows the rainwater mass 12 and the rainwater mass 14 to communicate with each other, and a lower flow path that allows the rainwater mass 12 and the rainwater mass 14 to communicate with each other. Since the lower flow path forming portion 67 forming 66 is integrally formed by extrusion, the number of parts is reduced. Therefore, the product cost can be reduced. Further, since the number of parts is reduced, the connection to the rainwater masses 12 and 14 is facilitated, and the construction is facilitated. Further, since the upper flow path forming portion 63 and the lower flow path forming portion 67 are integrally formed, there are few gaps between them that are difficult to be backfilled, and the construction is also easy from this point.

  Moreover, the division | segmentation partition wall which the lower flow-path formation part 67 divides | segments the lower flow path 66 into the some division | segmentation flow paths 71-74 each communicated with the outside by the thing corresponding to the drain holes 81-84 individually. 75,76. Thereby, the rainwater permeation pipe | tube 11 can be divided | segmented into the some division | segmentation flow paths 71-74, and can flow rainwater, As a result, the flow of the rainwater in a pipe | tube can be stabilized. Therefore, rainwater can be smoothly drained from the drain holes 81 to 84 to the outside of the pipe, that is, to the underground UG. Moreover, since the partition walls 75 and 76 serve as reinforcing ribs and can improve the load bearing performance of the rainwater infiltration pipe 11, deformation and breakage due to the load received from the ground side can be suppressed.

  Moreover, the some division | segmentation flow paths 71-74 are arrange | positioned at the step shape in the up-down direction, and the flow-path area is small toward the lower stage side. Thereby, the rainwater permeation pipe 11 has rainwater in the upper divided flow paths 73 and 74 in addition to the lower divided flow paths 71 and 72 when the flow rate is increased as compared with the case where the flow area is uniform. Can be played immediately. Therefore, when the flow rate increases, it is possible to immediately drain rainwater from more of the drain holes 81 to 84 to the outside of the pipe, that is, to the underground UG.

  Further, the lower flow path forming portion 67 has drain holes 81 to 84 formed in the peripheral wall 65 over the entire length, and the divided wall portions 90 to 93 of the peripheral wall 65 divided by the drain holes 81 to 84 are divided into partition walls 75, It is connected by 76. Thereby, the drain holes 81-84 can be easily formed by extrusion molding. Therefore, the product cost can be further reduced.

  The rainwater infiltration pipe 11 has an upper flow formed by an outer cylinder part 51 having an elliptical cross section whose height is larger than the width, and a semi-cylindrical part 52 formed in the outer cylinder part 51 and above the outer cylinder part 51. The path forming portion 63 is formed in a cylindrical shape, and has an internal partition wall 61 that forms a lower flow path forming portion 67 with the flat plate portions 54 and 55 in the middle portion of the outer cylinder portion 51 and the lower semi-cylindrical portion 53. ing. Thereby, the moldability of extrusion molding improves. Moreover, since it is the shape which has the outer cylinder part 51 which makes cross-sectional oval shape whose height is larger than a width | variety, it can be easily refilled so that there may be no space | gap around it, and construction will become still easier.

  Next, a second embodiment of the present invention will be described mainly with reference to FIGS. 1 and 3 focusing on differences from the first embodiment. The same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In the second embodiment, a storm water penetration pipe 11A shown in FIG. 3 is used in place of the storm water penetration pipe 11 of the first embodiment instead of the storm water penetration pipe 11 of the first embodiment.

  The rainwater infiltration pipe 11 </ b> A has a dividing partition along the horizontal direction in which the lower channel forming part 67 divides the two divided channels 71, 72 into four divided channels 101, 102, 103, 104 inside the peripheral wall 65. It has a wall 110. The dividing partition wall 110 connects an intermediate position in the vertical direction on one side in the width direction of the semi-cylindrical portion 53 and an intermediate position in the vertical direction on the other side in the width direction of the semi-cylindrical portion 53. Is formed over. The dividing partition wall 110 is parallel to the dividing partition wall 76.

  A divided flow path 101 is formed inside the half cylindrical portion 53 on one side in the width direction and the divided partition walls 75 and 110, and the other side in the width direction of the semi-cylindrical portion 53 and the divided partition walls 75 and 110. A divided flow path 102 is formed inside these. In addition, a divided flow path 103 is formed on one side in the width direction of the semi-cylindrical portion 53 and the dividing partition walls 75, 76, 110, and the other side in the width direction of the semi-cylindrical portion 53 and the dividing partition wall 75. , 76, and 110, the divided flow path 104 is formed inside these. That is, the divided flow channel 71 is divided into upper and lower divided flow channels 101 and 103, and the divided flow channel 72 is divided into upper and lower divided flow channels 102 and 104. The divided flow paths 101 and 102 are arranged in the lower stage, the divided flow paths 103 and 104 are arranged in the middle stage, and the divided flow paths 73 and 74 are arranged in the upper stage. The divided flow paths 101 and 102 have the same flow area. The divided flow paths 103 and 104 have the same flow area, and the flow areas are larger than the divided flow paths 101 and 102. The divided flow paths 73 and 74 have the same flow area and are larger than the divided flow paths 103 and 104. That is, the plurality of divided flow paths 73, 74, 101 to 104 are arranged stepwise in the vertical direction, and the flow path area is smaller toward the lower stage.

  Then, the drainage holes 81 and the drainage holes 82 individually communicate with the divided flow passages 101 and 102, respectively. Drain holes 111 and 112 for individually connecting 104 to the outside of the pipe are additionally formed. A drainage hole 111 is formed between the drainage hole 81 and the drainage hole 83 on one side in the width direction of the semi-cylindrical portion 53, and this drainage hole 111 communicates the divided flow path 103 outside the pipe. A drainage hole 112 is formed between the drainage hole 82 and the drainage hole 84 on the other side in the width direction of the semi-cylindrical portion 53, and this drainage hole 112 allows the divided flow path 104 to communicate with the outside of the pipe. Therefore, each of the divided flow paths 73, 74, 101 to 104 is communicated with the outside of the pipe by a corresponding one of the drain holes 81 to 84, 111, and 112.

  Here, the drain holes 111 and 112 are also formed in the peripheral wall 65 in a slit shape over the entire length thereof. In other words, the drain holes 111 and 112 both penetrate the peripheral wall 65 in the length direction. Since the drainage holes 111 and 112 are formed, the peripheral wall 65 is divided between the drainage holes 81 and 111, the partitioning wall part 122 between the drainage holes 82 and 112, and the drainage holes 111 and 83. It has a wall part 123 and a dividing wall part 124 between the drain holes 112 and 84. In other words, the dividing wall portion 91 is divided into dividing wall portions 121 and 123, and the dividing wall portion 92 is divided into dividing wall portions 122 and 124. Each of the dividing wall portions 121 and 122 includes a part of the semi-cylindrical portion 53, the dividing wall portion 123 includes a part of the semi-cylindrical portion 53 and the flat plate portion 54, and the dividing wall portion 124 includes the semi-cylindrical portion 53 and the flat plate portion 55. It consists of a part of.

  The divided partition wall portions 90, 93, 121 to 124 are all connected by the divided partition walls 75, 76, 110. That is, the dividing wall portions 121 and 122 are connected to each other by the dividing partition wall 110 and are connected to the dividing wall portions 90 and 93 by the dividing partition walls 75 and 110, and the dividing wall portions 123 and 124 are connected to the dividing partition wall. In addition to being connected to each other by 76, they are connected to the dividing wall portions 90 and 93 by dividing partition walls 75 and 76.

  The above-described rainwater permeating pipe 11A also has a constant cross section perpendicular to the longitudinal direction over the entire length in the longitudinal direction, and is integrally formed by extrusion, and the drain holes 81 to 84, 111, and 112 are formed during this extrusion. Is also formed.

  The rainwater infiltration pipe 11A has one end in the length direction connected to the connection hole 29 of the rainwater mass 12 shown in FIG. 1, and the other end in the length direction connected to the connection hole 39 of the rainwater mass 14 shown in FIG. The Thereby, the divided flow paths 73, 74, 101 to 104 constituting the lower flow path 66 and the upper flow path 62 allow the rainwater mass 12 and the rainwater mass 14 to communicate with each other. In addition, a filter (not shown) similar to that of the first embodiment is attached to the rainwater infiltration pipe 11A so as to cover the drain holes 81 to 84, 111, and 112.

  In the second embodiment described above, rainwater is introduced into the rainwater mass 12 from the rainwater source side such as a rain gutter of a building, for example, and the water level is the upper surface of the lower end portion of the semi-cylindrical portion 53 of the rainwater permeation pipe 11A. If it becomes higher than that, rainwater flows from the rainwater mass 12 to the rainwater mass 14 side through the divided flow passages 101 and 102 of the rainwater permeation pipe 11A. When the water level of the rainwater in the divided flow paths 101 and 102 becomes higher than the height of the drainage holes 81 and 82, the rainwater is discharged from the drainage holes 81 and 82 to the outside of the rainwater permeation pipe 11A and passes through the gap between the crushed stones S. It penetrates underground UG.

  Further, if rainwater accumulates in the rainwater mass 12 at a flow rate exceeding the discharge flow rate from the drain holes 81 and 82, the water level rises during drainage from the drain holes 81 and 82, and the water level is divided into the rainwater permeation pipe 11A. When the height is higher than the upper surface of the partition wall 110, rainwater flows from the rainwater mass 12 through the divided flow paths 101 to 104 of the rainwater permeation pipe 11 to the rainwater mass 14 side. When the rainwater level in the divided flow paths 103 and 104 becomes higher than the height of the drainage holes 111 and 112, the rainwater is also discharged from the drainage holes 111 and 112 to the outside of the rainwater permeation pipe 11A and passes through the gap between the crushed stones S. It penetrates underground UG.

  In addition, if rainwater accumulates in the rainwater mass 12 at a flow rate that exceeds the discharge flow rate from the drain holes 81, 82, 111, 112, the water level also rises during drainage from the drain holes 81, 82, 111, 112, When the water level becomes higher than the upper surface of the partition wall 76 of the rainwater infiltration pipe 11A, rainwater flows from the rainwater mass 12 through the flow paths 73, 74, 101 to 104 of the rainwater infiltration pipe 11A to the rainwater mass 14 side. When the rainwater level in the divided flow paths 73 and 74 is higher than the height of the drainage holes 83 and 84, the rainwater is also discharged from the drainage holes 83 and 84 to the outside of the rainwater permeation pipe 11 and passes through the gap between the crushed stones S. It penetrates underground UG.

  Furthermore, if rainwater accumulates in the rainwater mass 12 at a flow rate that exceeds the discharge flow rate from the drain holes 81 to 84, 111, 112, the water level also rises during drainage from the drain holes 81 to 84, 111, 112, When the water level becomes higher than the upper surface of the lower end portion of the inner partition wall 61 of the rainwater permeation pipe 11A, rainwater from the rainwater mass 12 passes through the upper flow path 62 in addition to the lower flow path 66 of the rainwater permeation pipe 11A. Flows to the side. When the rainwater level further rises and the rainwater level on the rainwater mass 14 side becomes higher than the upper surface of the lower end portion of the pipe 15, the rainwater flows to the rainwater discharge destination side such as a side ditch of the road through the pipe 15.

  As described above, in the second embodiment, the drainage holes 81, 82, the drainage holes 81, 82, 111, 112, or the drainage holes 81-84, 111, 112 to the outside of the rainwater infiltration pipe 11A. Rainwater is to be discharged and penetrated into the underground UG through the gaps between the crushed stones S.

  The rainwater permeating pipe 11A described above has a plurality of lower flow passage forming portions 67 that communicate with the lower flow passage 66 outside the pipe by means of individually corresponding drain holes 81 to 84, 111, 112, respectively. Divided partition walls 75, 76, and 110 are divided into divided flow paths 73, 74, and 101 to 104. As a result, the rainwater permeating pipe 11A can be divided into more divided flow paths 73, 74, 101 to 104 than in the first embodiment to flow rainwater, and as a result, the flow of rainwater in the pipe can be further stabilized. Can do. Therefore, rainwater can be smoothly drained from the drain holes 81 to 84, 111, and 112 to the outside of the pipe, that is, to the underground UG. Moreover, since the partition wall 75, 76, 110 more than 1st Embodiment becomes a rib for a reinforcement, and the load bearing performance of the rainwater penetration pipe | tube 11 can be improved, the deformation | transformation by the load received from the ground side, a failure | damage, etc. Can be further suppressed.

  Moreover, the some division | segmentation flow paths 73, 74, 101-104 are arrange | positioned at the step shape to the up-down direction, and the flow-path area is small toward the lower stage side. As a result, the rainwater permeating pipe 11A has rainwater in the middle divided flow paths 103 and 104 in addition to the lower divided flow paths 101 and 102 when the flow rate is increased as compared with the case where the flow area is uniform. In addition to the lower divided flow channels 101 and 102 and the middle divided flow channels 103 and 104, the rain water is immediately flowed to the upper divided flow channels 73 and 74 when the flow rate further increases. Can do. Therefore, when the flow rate increases, it is possible to drain rainwater from more of the drain holes 81 to 84, 111, and 112 to the outside of the pipe, that is, to the underground UG.

  Further, the lower flow path forming portion 67 has drain holes 81 to 84, 111, 112 formed in the peripheral wall 65 over the entire length, and the divided wall portion 90 of the peripheral wall 65 divided by the drain holes 81 to 84, 111, 112. , 93, 121-124 are connected by dividing partition walls 75, 76, 110. Thereby, the drain holes 81-84, 111, 112 can be easily formed by extrusion molding. Therefore, the product cost can be further reduced.

  Next, a third embodiment of the present invention will be described mainly with reference to FIG. 4 focusing on differences from the second embodiment. The same parts as those in the second embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  In the third embodiment, a rainwater permeation pipe 11B that is partially different from the rainwater permeation pipe 11A of the second embodiment is used in the rainwater permeation system 10.

  The rainwater permeating pipe 11B is formed by separately connecting the divided flow paths 73, 74, 101 to 104 to the peripheral wall 65 of the lower flow path forming portion 67 in place of the drain holes 81 to 84, 111, 112 of the second embodiment. Drain holes 81B, 82B, 83B, 84B, 111B, 112B, 81C, 82C, 83C, 84C, 111C, and 112C are formed to communicate with the outside. The drain holes 81B and 81C communicate the divided flow path 101 outside the pipe. Further, the drain holes 82B and 82C communicate the divided flow path 102 outside the pipe. Further, the drain holes 111B and 111C communicate the divided flow path 103 outside the pipe. The drain holes 112B and 112C communicate the divided flow path 104 outside the pipe. Further, the drain holes 83B and 83C communicate the divided flow path 73 outside the pipe. Further, the drain holes 84B and 84C communicate the divided flow path 74 outside the pipe. Therefore, each of the divided flow paths 73, 74, 101 to 104 is communicated to the outside of the pipe by two individually corresponding ones of the drain holes 81B to 84B, 111B, 112B, 81C to 84C, 111C, and 112C. Yes.

  Here, the drain holes 81B to 84B, 111B, 112B, 81C to 84C, 111C, and 112C are all formed in the peripheral wall 65 in a slit shape along the length direction only at a part of the entire length. The lower drainage holes 81B, 81C, 82B, and 82C are formed in the vicinity of the central portion in the length direction of the peripheral wall 65, and the drainage holes 111B in the middle in the vertical direction are located outside the peripheral wall 65 in the length direction. 111C, 112B, 112C are formed, and upper drain holes 83B, 83C, 84B, 84C are formed outside the peripheral wall 65 in the longitudinal direction.

  The above-described rainwater infiltration pipe 11B also has a constant cross section perpendicular to the length direction over the entire length in the length direction except for the drain holes 81B to 84B, 111B, 112B, 81C to 84C, 111C, 112C. It is integrally formed by extrusion molding. At the time of the extrusion molding, the pins 81B to 84B, 111B, 112B, 81C to 84C, 111C, and 112C are formed at the above positions by appropriately moving the pins forward and backward in the extrusion mold. A filter (not shown) similar to that in the first embodiment is also attached to the rainwater infiltration pipe 11B so as to cover the drain holes 81B to 84B, 111B, 112B, 81C to 84C, 111C, and 112C.

  In the third embodiment described above, the drain holes 81B to 84B, 111B, 112B, 81C to 84C, 111C, and 112C are formed with the positions shifted in the length direction of the rainwater infiltration pipe 11B as described above. The lower drain holes 81B, 81C, 82B, and 82C discharge rainwater from the vicinity of the central portion in the length direction of the peripheral wall 65, and the upper drain holes 83B, 83C, 84B, and 84C are the length of the peripheral wall 65. Rainwater is discharged from the vicinity of both ends in the vertical direction, and the intermediate drain holes 111B, 111C, 112B, and 112C discharge rainwater from positions between these length directions. Therefore, when the amount of drainage is large, rainwater can be drained evenly in the length direction of the rainwater permeation pipe 11B to the underground UG around the rainwater permeation pipe 11B. Therefore, rainwater can be penetrated into the underground UG more efficiently.

  In the third embodiment, since the peripheral wall 65 is not divided by the drain hole, part or all of the partition walls 75, 76, and 110 can be eliminated.

  In the first to third embodiments, the rainwater permeation tubes 11, 11 </ b> A, and 11 </ b> B may be formed by extrusion without any drainage holes, and all drainage holes may be formed by cutting. Moreover, you may form only a part of drainage hole by cutting.

10 Rainwater Infiltration System 11, 11A, 11B Rainwater Infiltration Pipe 12 Rainwater Mass (Introduction Rainwater Mass)
13 Piping (Rainwater introduction line)
14 rainwater trout (discharge side rainwater trout)
15 Piping (Rainwater discharge line)
51 Outer cylinder part 61 Internal partition wall 62 Upper flow path 63 Upper flow path formation part 65 Peripheral wall 66 Lower flow path 67 Lower flow path formation part 71-74, 101-104 Split flow path 75, 76, 110 Split partition wall 81- 84, 81B to 84B, 81C to 84C, 111, 112, 111B, 112B, 111C, 112C
90-93, 121-124 Split wall

Claims (6)

A rainwater infiltration pipe having one end connected to the introduction-side rainwater mass connected to the rainwater introduction line and the other end connected to the discharge-side rainwater mass connected to the rainwater discharge line;
An upper flow path forming part that forms an upper flow path for communicating the introduction-side rainwater mass and the discharge-side rainwater mass;
A lower flow path forming portion that forms a lower flow path that allows the introduction-side rainwater mass and the discharge-side rainwater mass to communicate with each other below the upper flow path is integrally formed by extrusion molding.
A drainage hole is formed in the peripheral wall of the lower flow path forming portion to communicate the lower flow path outside the pipe ,
The lower path openings, rainwater penetration, characterized in Rukoto which have a dividing partition wall for dividing the lower channel, a plurality of divided flow paths respectively communicated with the tube outside by a separate of said drain hole tube. The rainwater permeation pipe according to claim 1 , wherein the plurality of divided flow paths are arranged stepwise in the vertical direction, and the flow path area is smaller toward the lower stage side. The lower flow path forming part is
The drain hole is formed over the entire length of the peripheral wall,
The rainwater permeation pipe according to claim 1 or 2 , wherein the peripheral wall divided by the drain hole is connected by the divided partition wall. An outer cylinder part having an elliptical cross section whose height is larger than the width;
An internal partition formed in the outer cylinder part and forming the upper flow path forming part in a cylindrical shape with the upper part of the outer cylinder part and forming the lower flow path forming part with an intermediate part and a lower part of the outer cylindrical part rainwater penetration tube according to any one of claims 1 to 3, characterized in that it has a wall. A rainwater infiltration pipe having one end connected to the introduction-side rainwater mass connected to the rainwater introduction line and the other end connected to the discharge-side rainwater mass connected to the rainwater discharge line;
An upper flow path forming part that forms an upper flow path for communicating the introduction-side rainwater mass and the discharge-side rainwater mass;
A lower flow path forming portion that forms a lower flow path that allows the introduction-side rainwater mass and the discharge-side rainwater mass to communicate with each other below the upper flow path is integrally formed by extrusion molding.
A drainage hole is formed in the peripheral wall of the lower flow path forming portion to communicate the lower flow path outside the pipe ,
An outer cylinder part having an elliptical cross section whose height is larger than the width;
An internal partition formed in the outer cylinder part and forming the upper flow path forming part in a cylindrical shape with the upper part of the outer cylinder part and forming the lower flow path forming part with an intermediate part and a lower part of the outer cylindrical part rainwater penetration tube and said Rukoto that Yusuke and the wall, the. The rainwater infiltration pipe according to any one of claims 1 to 5,
An introduction-side rainwater mass connected to one end of the rainwater permeation pipe;
A discharge-side rainwater mass connected to the other end of the rainwater permeation pipe;
A rainwater introduction line connected to the introduction-side rainwater mass;
A rainwater infiltration system having a rainwater discharge line connected to the discharge-side rainwater mass.

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