JP2007332680A - Pipe connecting portion structure for rainwater storage and penetration equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a pipe connecting portion structure for rainwater storage and penetration equipment, capable of securing watertightness. <P>SOLUTION: In the rainwater storage and penetration equipment 10, a pipe such as an inflow pipe 18 is inserted into an insertion portion 28 of a connecting member 26, and rainwater flows to the inside and outside of a seepage control sheet 16 through the pipe such as the inflow pipe 18. In this case, since the seepage control sheet 16 is fusion-bonded onto the outward surface of the flange portion 30 of the connecting member 26 throughout the circumference of an insertion portion 20, the watertightness can be secured even if the rainwater flows. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a pipe connection structure for a rainwater storage and penetration device used for storing rainwater and the like.

  In the rainwater storage and penetration device, a device in which a pipe such as a rainwater inflow pipe or the like is inserted into a water shielding sheet that wraps the rainwater storage and penetration tank is known (for example, see Patent Document 1). In such an apparatus, the periphery of the tube insertion portion is wrapped with a water-impervious sheet and tightened with a SUS band or the like.

In this conventional pipe connection part structure, a gap is easily generated between the pipe insertion part and the water shielding sheet, and the water tightness is low.
JP 2004-52243 A

  In view of the above fact, an object of the present invention is to provide a pipe connection part structure for a rainwater storage and infiltration device that can ensure water tightness.

  The pipe connection part structure for the rainwater storage and permeation device according to the first aspect of the present invention can be inserted into a water shielding sheet that covers the rainwater storage and permeation tank and the pipe, and communicates with the inside of the water shielding sheet. An insertion part, and a flange part integrally formed with the insertion part, extending radially outward from the insertion part, and having the water shielding sheet adhered to the entire circumference of the insertion part. It is characterized by having.

  The rainwater storage and penetration tank refers to a tank that at least stores rainwater or penetrates into the ground. Specifically, a storage tank that stores rainwater, and a penetration tank that gradually permeates the ground after rainwater is temporarily stored. And all of the storage permeation tanks having both the function of the storage tank and the function of the permeation tank (the same applies in the following description).

  According to the pipe connection part structure for the rainwater storage and permeation device of the present invention described in claim 1, when a pipe is inserted into the insertion part, the rainwater flows into and out of the water shielding sheet through the pipe. Here, since the water-impervious sheet is adhered to the flange portion over the entire circumference around the insertion portion, watertightness can be ensured even when rainwater flows.

  The pipe connection part structure for a rainwater storage and infiltration device according to a second aspect of the present invention is the structure according to the first aspect, wherein the water shielding sheet is formed on the flange part around the insertion part. It is characterized by being fused.

  According to the pipe connection part structure for the rainwater storage and infiltration device of the present invention described in claim 2, since the water shielding sheet is fused to the flange part around the insertion part over the entire circumference. Watertightness can be ensured for a long time.

  A pipe connection part structure for a rainwater storage and infiltration device according to a third aspect of the present invention is the structure according to the second aspect, wherein the flange part has a protrusion around the insertion part over the entire circumference. The water shielding sheet is formed and fused to the protrusion.

  According to the pipe connection part structure for the rainwater storage and infiltration device of the present invention described in claim 3, the water-impervious sheet is fused around the insertion part over the entire circumference of the projection part of the flange part. Therefore, water tightness can be secured for a long time. Further, since the annular protrusion is formed, the entire periphery can be easily pressurized against the water-impervious sheet and the flange portion during the fusion work, so that the fusion work is facilitated.

  As described above, according to the pipe connection part structure for a rainwater storage and infiltration device of the present invention, there is an excellent effect that water tightness can be ensured.

  An embodiment of a pipe connection part structure for a rainwater storage and permeation device according to the present invention will be described with reference to the drawings.

  As shown in FIG. 1, the rainwater storage and penetration device 10 is a device embedded in the underground G, and this rainwater storage and penetration device 10 includes a rainwater storage and penetration tank 12. In this embodiment, the rainwater storage and penetration tank 12 is an assembly in which a plurality of constituent members 12A are arranged next to each other and stacked in the vertical direction.

  The circumference (upper and lower sides) of the rainwater storage and penetration tank 12 is covered with a water shielding sheet 16 via a protective mat 14 provided with a nonwoven fabric. The water shielding sheet 16 further includes a protective mat 15 provided with a nonwoven fabric. The surroundings (upper and lower sides) are covered.

  The water shielding sheet 16 is formed of a material that does not transmit water, such as resin, rubber, or thermoplastic elastomer. Here, specific examples of applicable resins include polyolefin resins such as polyethylene and polypropylene, polyester resins, ethylene-vinyl acetate (EVA) resins, and the like. Specific examples of applicable rubbers include rubbers such as EPDM and butyl rubber. Furthermore, specific examples of applicable thermoplastic elastomers (TPE) include olefin elastomers and urethane elastomers. The material of the water-impervious sheet 16 is preferably one that can be heat-sealed as described later at the construction site. The water shielding sheet 16 is preferably made of a material that has excellent weather resistance and can be used for a long time under various environmental conditions and is not easily torn.

  An inflow pipe 18 and an overflow pipe 20 that pass through the water shielding sheet 16 are arranged toward the upper side of the rainwater storage and penetration tank 12. The inflow pipe 18 is used for collecting rainwater, and an intermediate portion of the rainwater flow path by the inflow pipe 18 is connected to the sand sink 22. The sedimentation tank 22 is used for sedimentation for sedimenting sand and the like in rainwater (including rainwater having a high degree of pollution such as initial inflow rainwater), and has a function of not stirring the sedimented sand and the like. Thereby, the rainwater which flows into the rainwater storage penetration tank 12 will be in the state which hardly contains sand. Moreover, the overflow pipe 20 is used for discharge for discharging rainwater from the upper part of the rainwater storage and penetration tank 12 when the rainwater storage and penetration tank 12 is almost full.

  An outflow pipe 24 that penetrates the water shielding sheet 16 is arranged toward the lower side of the rainwater storage and penetration tank 12. The outflow pipe 24 is used for outflow for gradually flowing out rainwater stored in the rainwater storage and penetration tank 12.

  The inflow pipe 18, the overflow pipe 20, and the outflow pipe 24 are formed in a cylindrical shape, for example, a polyethylene pipe (PE pipe) or the like is applied, and the outer diameter (diameter) is, for example, 150 mm to 450 mm. . The inflow pipe 18, the overflow pipe 20, and the outflow pipe 24 are connected to the connection member 26 at a portion near the rainwater storage and penetration tank 12.

  FIG. 2 shows a pipe connection part structure 25 for a rainwater storage and permeation device according to this embodiment. The connection member 26 shown in FIG. 2 is formed of the same material (material) as the water shielding sheet 16 by injection molding, and includes a cylindrical insertion portion 28. The insertion portion 28 passes through the through-hole 16A of the water shielding sheet 16, and is a pipe (the inflow pipe 18, the overflow pipe 20 and the outflow pipe 24 shown in FIG. 1 (hereinafter referred to as “inflow pipe 18 etc.”). ) Can be inserted, and leads to the inside of the water shielding sheet 16 (the rainwater storage and penetration tank 12 (see FIG. 1) side). The inner diameter of the insertion portion 28 shown in FIG. 2 is substantially the same diameter (strictly, a slightly smaller diameter) as the outer diameter, which is the standard diameter of a pipe such as the inflow pipe 18 to be inserted. The gap between the insertion portion 28 and the pipe such as the inflow pipe 18 to be inserted is appropriately waterproofed with a sealing agent or the like.

  In a state where the pipe such as the inflow pipe 18 is inserted into the insertion section 28 (joint state), a pair of fasteners 32 are attached from the outside of the pipe such as the inflow pipe 18 and the insertion section 28 in the joint portion. It is done. A through hole 32 </ b> B is formed through the flange-like end portion 32 </ b> A of these fasteners 32. In a state where the end portions 32A of the fastener 32 are overlapped with each other, the bolt 34 is passed through the through hole 32B and the nut 36 is fitted to the end of the bolt 34, whereby the end portion 32A of the fastener 32 is fixed. Tightened. As a result, the pair of fasteners 32 press and tighten the insertion portion 28 and the inflow pipe 18 from both outer sides.

  As shown in FIG. 2, the connecting member 26 includes a flange portion 30. The flange portion 30 is integrated with the insertion portion 28, and is radially outward from the insertion portion 28 (the insertion portion 28. In a direction extending radially from the axial center of the insertion portion 28). The flange portion 30 is formed with an annular protrusion 30B (see FIG. 3) around the base end portion 28A of the insertion portion 28 on the outward face 30A on the insertion portion 28 side. In addition, the water shielding sheet 16 is fused around the insertion portion 28 over the entire circumference on the outward face 30 </ b> A (including the protruding portion 30 </ b> B) of the flange portion 30. By this fusion, the flange portion 30 of the connecting member 26 and the water shielding sheet 16 are in an integrated state.

  Here, the fusion | fusion operation | work of the flange part 30 and the water shielding sheet 16 in a construction site is demonstrated easily. First, a part of the flange portion 30 of the connection member 26 shown in FIG. 1 is temporarily fixed to the rainwater storage and penetration tank 12. At this time, the flange portion 30 penetrates a part of the protective mat 14. Next, the water shielding sheet 16 is superimposed on the outward surface 30A of the flange portion 30 through the insertion portion 28 of the connecting member 26 in the through hole 16A of the water shielding sheet 16 shown in FIG. In this state, hot air is blown onto the overlapping portion of the flange portion 30 and the water shielding sheet 16, and the portions where the hot air is blown are sequentially pressed by a pressure roller (not shown) and fused.

  At the time of pressurization by the pressure roller, the water-impervious sheet 16 and the flange portion 30 are pressed against the rainwater storage and penetration tank 12 (see FIG. 1). In addition, since the annular protrusion 30B is formed, the pressure on the water-impervious sheet 16 superimposed on the protrusion 30B shown in FIG. 3 can be increased, so that the water-impervious sheet 16 is reliably attached to the protrusion 30B. As a result, the entire circumference of the flange portion 30 around the insertion portion 28 is reliably fused.

  The flange portion 30 in the state before fusion is formed into a substantially rectangular plate shape (see FIG. 2), and the thickness thereof is thicker than the thickness of the water shielding sheet 16, and the hardness thereof is also harder than that of the water shielding sheet 16. Yes. This facilitates the pressure work by the pressure roller. In the present embodiment, the thickness of the water shielding sheet 16 is set to about 0.5 mm to 10 mm in consideration of strength and fusion workability.

  Moreover, the extension dimension from the insertion part 28 in the flange part 30 shown by FIG. 2, ie, the dimension (overlap width) of the part used as the overlap margin with the water-impervious sheet 16, ensures about 300 mm at the shortest part. It is preferable. Thus, securing the overlapping width of the flange portion 30 to 300 mm or more may cause the water shielding sheet 16 to shrink by about 100 mm at the time of fusing, and in the installed state, the water shielding sheet 16 due to temperature difference. This is because there is a possibility of shrinking slightly by 200 mm.

  Next, the operation of the above embodiment will be described.

  The rainwater that has flowed into the inflow pipe 18 shown in FIG. 1 flows into the rainwater storage and penetration tank 12 in a state where sand and the like in the rainwater are removed by the sand sink 22. When the rainwater storage and penetration tank 12 becomes almost full, the rainwater in the rainwater storage and penetration tank 12 is discharged to a river or the like through the overflow pipe 20. In addition, when the rainwater stored in the rainwater storage and penetration tank 12 is gradually discharged, the rainwater is discharged from the outflow pipe 24.

  Thus, rainwater flows in and out of the water shielding sheet 16 through a pipe such as the inflow pipe 18. Here, in the portion where the pipe such as the inflow pipe 18 is inserted into the water-impervious sheet 16, the water-impervious sheet 16 is fused to the flange portion 30 of the connection member 26 over the entire circumference of the insertion portion 28. Therefore, rainwater does not leak even when rainwater flows, and watertightness can be secured for a long time.

  In the above embodiment, in order to fuse the water shielding sheet 16, hot air is blown to the water shielding sheet 16, and the portions where the hot air is blown are sequentially pressed by a pressure roller. You may fuse | fuse by pressing on the water-impervious sheet 16.

  In the above embodiment, the water shielding sheet 16 is fused to the flange portion 30 of the connection member 26 over the entire circumference of the insertion portion 28, but the water shielding sheet is provided to the flange portion. You may adhere | attach by solvent welding or an adhesive over the perimeter of an insertion part.

  Furthermore, in the said embodiment, although the flange part 30 of the connection member 26 is made into the substantially rectangular plate shape, other shapes, such as a substantially ring shape, may be sufficient.

  Furthermore, in the above embodiment, one annular protrusion 30B is formed over the entire circumference of the flange portion 30 around the insertion portion 28, but the entire circumference of the flange portion 30 around the insertion portion 28 is formed. A plurality of the annular protrusions 30 </ b> B may be formed (for example, concentrically).

  In the above-described embodiment, as shown in FIG. 1, the rainwater storage and permeation tank 12 is covered with the water shielding sheet 16 so that the pipe connection structure for the rainwater storage and permeation device is applied. Although the case has been described, for example, in a configuration in which the lower part of the rainwater storage and penetration tank is covered with the water-impervious sheet 16 to perform the storage function and the upper part is covered with the water-permeable sheet to perform the penetration function, A pipe connection structure for a rainwater storage and permeation device may be applied corresponding to the broken portion.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic block diagram which shows the rainwater storage penetration apparatus with which the pipe connection part structure for rainwater storage penetration apparatuses which concerns on embodiment of this invention is applied. It is a perspective view which shows the pipe connection part structure for the rainwater storage penetration apparatus which concerns on embodiment of this invention. It is sectional drawing which shows the pipe connection part structure for the rainwater storage penetration apparatus which concerns on embodiment of this invention.

Explanation of symbols

10 Rainwater storage and penetration tank 16 Impermeable sheet 18 Inflow pipe (pipe)
20 Overflow pipe (pipe)
24 Outflow pipe (pipe)
25 Pipe connection part structure for rainwater storage and penetration device 28 Insertion part 30 Flange part 30B Protrusion part

Claims (3)

A water shielding sheet covering the rainwater storage and penetration tank;
A tube can be inserted, and the insertion portion leading to the inside of the water-impervious sheet; and
A flange portion that is integral with the insertion portion, extends radially outward from the insertion portion, and the water shielding sheet is bonded to the entire circumference of the insertion portion;
A pipe connection part structure for a rainwater storage and permeation device, comprising:   The pipe connection part structure for a rainwater storage and permeation device according to claim 1, wherein the water shielding sheet is fused to the flange part over the entire circumference of the insertion part.   The rainwater storage and infiltration according to claim 2, wherein a protrusion is formed on the flange portion around the insertion portion over the entire circumference, and the water shielding sheet is fused to the protrusion. Pipe connection structure for equipment.

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