JP2009007769A - Rainwater storage structure member and rainwater storage structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rainwater storage structure member and a rainwater storage structure having the rainwater storage structure member facilitating connection between members with high working efficiency and making a connection structure firm. <P>SOLUTION: The rainwater storage structure member comprises a plurality of vertical pipe members 3 of predetermined length; lateral members for assembling a 3D structure together with the vertical pipe members 3; and connecting tools connectable to the vertical pipe members 3 and the lateral members to connect the vertical pipe members 3 and the lateral members to each other. The vertical pipe members 3 and the connecting tools, and the lateral members and the connecting tools, are fitted and assembled to form the 3D structure, and space can be formed inside. When the connecting tool is fitted to the vertical pipe member 3, since the outer peripheral surface of an end 3a of the vertical pipe member abutting on the connecting tool is embossed, the inner peripheral surface of the connecting tool abutting on the end 3a of the vertical pipe member is formed in a smooth surface compared with an uneven surface based on embossing performed to the outer peripheral surface of the end 3a of the pipe member. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a member for rainwater storage structure and a rainwater storage structure, and more specifically, a plurality of pipe-shaped vertical members having a predetermined length, a horizontal member for assembling a three-dimensional structure together with these pipe-shaped vertical members, and the pipe-shaped A connecting jig that can be connected to the vertical member and the horizontal member and that connects the pipe-shaped vertical member and the horizontal member to each other, the pipe-shaped vertical member and the connecting jig, and the horizontal member and the connecting jig The present invention relates to a rainwater storage structure member that can form a three-dimensional structure by being assembled with each other and that can form a space therein, and a rainwater storage structure including the same.

  In recent years, particularly in urban areas, problems such as abnormal rainfall and flooding, and vice versa, have frequently occurred, and the cause is the heat island phenomenon. In order to alleviate this phenomenon, the construction of facilities that use rainwater has been proposed, and development of rainwater storage structures or rainwater storage fillers has been progressing.

  As such a rainwater storage structure, for example, a pit is dug in the ground, a water shielding sheet is laid on the outer surface, a plurality of container-like members are stacked vertically and horizontally, and a top cover is covered with soil. The invention of the structure which covers by applying etc. and stores rainwater is made | formed (for example, refer patent document 1).

  Alternatively, it is a rainwater storage filler in which a plurality of detachable support columns which are hollow bodies are vertically fixed by a connecting member, and the connecting member is integrally connected by a detachable connecting bar and an edge frame. Thus, an invention has been made that can prevent the column from dropping off at the corner during transportation (see, for example, Patent Document 2).

  However, since the structure and the rainwater storage filler contain a large space for storing rainwater and are bulky, there is a problem that the transportation cost is high for the transport amount, and these container-like members and Since the shape of the filler is fixed, there is a drawback that it cannot flexibly cope with the shape of the rainwater storage and penetration tank.

  For this reason, the inventors of the present invention can reduce the transportation cost for the transport amount, and can flexibly cope with the shape of the rainwater storage and infiltration tank, and the rainwater storage structure including the resin rainwater storage structure member Invented a product (see, for example, Patent Document 3).

JP-A 63-268823 JP 2004-19205 A JP 2006-104739 A

  In that case, when assembling as a rainwater storage structure, in order to strengthen the connection structure of the resin rainwater storage structure member, the surface of one member is melted with an organic solvent, or the member is difficult to dissolve in an organic solvent. In this case, the joint surfaces were partially melted and joined by the electric heating method. However, using the former organic solvent is not desirable from an environmental point of view. It is not preferable because it takes time and labor, such as using tools.

  Therefore, in view of the above-mentioned problems of the prior art, the object of the present invention is not only the use of an organic solvent but also a member with good workability without the need for using a complicated jig such as an electric heating method. It is intended to provide a rainwater storage structure member that can easily connect between them and that can strengthen the connection structure, and a rainwater storage structure including the rainwater storage structure.

  The above-mentioned subject is achieved by the invention described in each claim. That is, the characteristic configuration of the rainwater storage structure member according to the present invention includes a plurality of pipe-shaped vertical members having a predetermined length, a horizontal member that assembles a three-dimensional structure together with the pipe-shaped vertical members, and the pipe-shaped vertical member. And a connecting jig that connects the pipe-shaped vertical member and the horizontal member to each other, the pipe-shaped vertical member, the connecting jig, and the horizontal member and the connecting jig. When connecting the pipe-shaped vertical member and the connecting jig in a rainwater storage structure member that forms a three-dimensional structure by fitting and assembling and can form a space in the three-dimensional structure, the connection jig is used. The pipe-shaped vertical member is in contact with the tool and the outer peripheral surface of the end of the pipe-shaped vertical member is buffed, and the inner peripheral surface of the connecting jig in contact with the end of the pipe-shaped vertical member is the end of the pipe-shaped vertical member. Based on the wrinkles on the outer periphery In that it is formed on the smooth surface than the uneven surface.

  According to this configuration, when the pipe-like vertical member and the connection jig are fitted, the convex portion of the grain is elastically deformed, and the fitting is facilitated and the fitting is completed when the fitting is completed. As the internal stress increases, it is possible to secure a close fitting state with the inner peripheral surface of the connecting jig, and it becomes difficult to come out, and the joining structure can be strengthened. As well as individual pipe-shaped vertical members, horizontal members, and connecting jigs transported to the construction site, an assembly three-dimensional structure can be formed at the construction site, and the conveyance efficiency of each member is high. Furthermore, since it can be basically assembled from three kinds of lightweight members, the construction is easy, the construction time is shortened, and the construction cost can be kept low. Nevertheless, since the strength is ensured, a stable construction work can be performed and a structure having excellent durability after construction can be obtained. Needless to say, the lengths of the pipe vertical member and the horizontal member can be appropriately changed to increase the horizontal compressive strength in the former case, and to increase the vertical compressive strength in the latter case.

  Moreover, the function that the airtightness or watertightness in a fitting part with a connection jig | tool is strengthened by attaching | subjecting such a warp and forming a continuous pattern in a pipe-shaped vertical member can also be added. As a result, it is possible to prevent the various algae and suspended matters generated during long-term use from adhering to the inside of the member to be fitted, and to improve workability during maintenance and disassembly cleaning.

  As a result, it is not necessary to use an organic solvent, it is not necessary to use a complicated jig such as an electric heating method, it is easy to connect between members with good workability, and rainwater can strengthen the connection structure. A storage structure member could be provided.

  When fitting the pipe-shaped vertical member and the connection jig, it is preferable that the outer peripheral surface of the end of the pipe-shaped vertical member in contact with the connection jig is slightly enlarged in diameter as the distance from the tip is increased. .

  According to this configuration, when the pipe-like vertical member and the connection jig are fitted, the convex portion of the dent is elastically deformed, and when the fitting is easy and the fitting is completed, the position separated from the tip. The deformation of the nodule will return to its original shape, making it more difficult to come off. In addition, since the draft angle of the mold is usually formed on the inner peripheral surface of the connection jig that receives the tip of the pipe-shaped vertical member, the end of the pipe-shaped vertical member and the inner peripheral surface of the connection jig This increases the contact area and makes it difficult to pull out, thereby strengthening the joint structure at this point.

  It is preferable that the unevenness of the grain provided on the outer peripheral surface of the end portion of the pipe-shaped vertical member is 10 to 40 μm, and the unevenness of the inner peripheral surface of the connecting jig is 1 μm or less.

  According to this configuration, when the pipe-like vertical member and the connecting jig are fitted, the fitting becomes easier, and when the fitting is completed, the both are made difficult to come out and the joining structure is strengthened. it can. If the unevenness of the grain is less than 10 μm, the deformation of the grain is small, and if it exceeds 40 μm, the fitting work between the pipe-like vertical member and the connecting jig becomes difficult. As for the unevenness | corrugation of the grain given to the outer peripheral surface of the edge part of a pipe-shaped vertical member, it is more preferable that it is 20-30 micrometers. In this case, the unevenness of the grain refers to the average value of the difference between the peak and valley of the grain.

  Ribs formed along the vertical direction are provided on the outer peripheral surface of the pipe-shaped vertical member, and the ribs of the pipe-shaped vertical member are inserted when the pipe-shaped vertical member and the connection jig are fitted. It is preferable that possible vertical grooves are formed in the connecting jig.

  According to this configuration, the strength of the pipe-shaped vertical member, particularly the buckling strength, can be remarkably improved with a simple configuration, and the strength of the rainwater storage structure assembly can be improved as a whole.

  The connection between the horizontal member and the connection jig is made such that the end surface of the horizontal member and the outer peripheral surface of the connection jig face each other, and the end surface of the horizontal member cannot rotate around the connection jig. It is preferable to be connected to.

  According to this configuration, it is possible to prevent the transverse member coupled to the connection member from being rotated inadvertently during construction, the work can be stably performed, and the connection strength is increased.

  Moreover, the characteristic structure of the rainwater storage structure which concerns on this invention is equipped with the three-dimensional structure assembled from the member for rainwater storage structures of any one of Claims 1-5, The upper surface of this three-dimensional structure The coating layer is provided on the side.

  According to this configuration, it is not necessary to use an organic solvent, it is not necessary to use a complicated jig such as an electric heating method, the connection between members can be easily performed with good workability, and the connection structure is strong. The rainwater storage structure which can be made can be provided.

  Embodiments according to the present invention will be described in detail with reference to the drawings. FIG. 1 shows a perspective view of a unit block in which a connecting jig 1, a transverse member 2, and a pipe-like longitudinal member 3 used as an assembly member for a rainwater storage structure according to this embodiment are assembled. That is, FIG. 2 is a perspective view of the pipe-like vertical member 3 as seen from the top surface direction, and FIG. 3 is a perspective view showing a connection state between the connecting jig and the horizontal member.

  As shown in FIG. 1, the connecting jig 1 is made of resin. As shown in FIG. The projecting portion 1b that connects the two has four through holes 1c that receive and engage end projections (not shown) of the lateral member 2 in the projecting portion 1b. Furthermore, a slightly smaller diameter through hole is formed inside the cylindrical portion 1a to reduce weight, and rainwater is moved downward to be stored.

  Between the protruding portions 1b of the connecting member 1, four protruding portions 1d are formed, and four vertical grooves 1e are formed in the upper and lower cylindrical portions 1a. An overhanging protrusion 1f is formed with the side protruding somewhat. It is preferable that both corners of the bottom of the vertical groove 1e are formed in a somewhat arcuate shape. If it does in this way, when big external stress acts in the state where the pipe-shaped vertical member 3 was inserted and fitted to the connection member 1, it can suppress that the crack from the bottom part of the vertical groove 1e arises, and progress of a crack. Can be suppressed.

  In addition, since four overhang portions 1d are formed between the protruding portions 1b, when the transverse member 2 is connected, the transverse member 2 can be prevented from rotating in the horizontal direction (rotation stop mechanism). In performing the work, the lateral member 2 does not rotate and move carelessly, so that the work is facilitated and the effect of suppressing the downward deflection of the lateral member during the construction work is exhibited.

  Furthermore, the inner peripheral surface of the cylindrical portion 1a of the connecting jig 1 that contacts the end of the pipe-shaped vertical member 3 is formed as a smooth surface with irregularities of 1 μm or less. When connecting the pipe-shaped vertical member 3, the fitting / connecting state of both is strengthened. Reference numeral 1g is an outer peripheral surface vertical rib that protrudes substantially parallel to the outer peripheral surface of the overhanging portion 1d. Although not shown, it engages in surface contact with a rib provided on the back surface side of the lateral member 2. When connecting the connecting member 1 and the transverse member 2, the unity is improved so that they do not wobble, and a large deformation resistance force is exerted against an excessive load from the horizontal direction. I am trying to get it.

  Since the connecting member 1 is configured in this way, when the pipe-like vertical member is fitted to the upper and lower cylindrical parts 1a, the cylindrical part 1a is appropriately expanded in diameter, so the design of the vertical member While the degree of freedom becomes somewhat higher, the dimensional flexibility of the vertical member becomes higher and the workability of construction is improved. Further, for connection with the horizontal member 2, a recess 2g on the end surface side of the vertical wall 2e formed on the horizontal member 2 and an overhang formed on the upper side of the overhanging portion 1d of the connection member 1 are also shown. The protrusion 1f is fitted, the connection between the connecting member 1 and the transverse member 2 is further strengthened, and the strength of the rainwater storage structure assembly A in which the rainwater storage structure assembly member is assembled is significantly improved. As shown by an arrow R in FIG. 3, the connection between the connecting member 1 and the transverse member 2 is brought into a connected state by lowering the transverse member 2 from above. In addition, in the uppermost position of the connection member 1, since the pipe-shaped vertical member 3 is not connected, the cylindrical part 1a facing upward becomes unnecessary. For this reason, the protruding portion at the top of the cylindrical portion 1a may be removed and a cap member (not shown) having a thin disk-like top may be fitted.

  The pipe-like vertical member 3 is made of resin, has a cylindrical shape having a predetermined length, and can be fitted in the cylindrical portion 1 a of the connection jig 1. The outer peripheral surface of the end portion 3a of the pipe-shaped vertical member 3 in contact with the connecting jig 1 is subjected to graining with irregularities of 10 to 40 μm, and the outer peripheral surface of the end portion 3a of the pipe-shaped vertical member 3 is As the distance from the tip increases, the diameter is slightly increased and the thickness is increased.

  That is, assuming that the outer diameter at the free end of the pipe-shaped vertical member 3 having a length of 400 mm is 60 mm, the pipe-shaped vertical member 3 has a gradient that expands by about 0.5 ° from the free end toward the center to a position of 60 mm. The outer diameter at this position is 61 mm, and weaving is performed from the free end to this position. On the other hand, the cylindrical portion 1a of the connecting member 1 into which the end portion 3a of the pipe-shaped vertical member 3 is fitted is a draft angle of the mold so that the inner diameter is 62 mm at a position of 60 mm from the bottom toward the opening end. Is formed. Therefore, when the end portion 3a of the pipe-like vertical member 3 is inserted into the cylindrical portion 1a of the connecting member 1 and fitted, the convex portion of the wrinkle is elastically deformed to facilitate fitting and complete fitting. In particular, at the bottom of the cylindrical portion 1a of the connecting member, the internal stress associated with deformation of the warp increases, and a close fitting state is secured with the inner peripheral surface of the cylindrical portion 1a of the connecting jig 1. As a result, it becomes difficult to come out and the joining structure can be strengthened. Not only that, but the slipping gradient is formed on the inner peripheral surface of the cylindrical portion 1a of the connecting jig 1, so that when the fitting is completed, the deformation of the wrinkles away from the tip is restored. The contact area between the end portion of the pipe-shaped vertical member and the inner peripheral surface of the cylindrical portion 1a of the connecting jig is increased, and it is difficult to come off, so that the joint structure at this point can be reinforced. As for the said gradient formed in the edge part 3a of the pipe-shaped vertical member 3, about 0.3-1 degree is preferable.

  Further, such a wrought process is continuously formed from the free end to a predetermined position as described above, and the end portion 3a of the pipe-like vertical member 3 is fitted to the cylindrical portion 1a of the connecting member 1, thereby fitting. The air tightness or water tightness in the part can be enhanced. It is possible to prevent various algae and suspended matter from adhering to the inside of the end portion 3a of the pipe-like vertical member 3 and the inside of the cylindrical portion 1a of the connecting member 1 that are generated during long-term use. Workability can be improved in maintenance of assembly members and in disassembly and cleaning work.

  The embossing on the outer peripheral surface of the end 3a of the pipe-shaped vertical member 3 can be easily performed by forming a shape reverse to the wrinkle pattern in an injection mold in advance and employing an injection molding method. it can.

  It is preferable that a reinforcing vertical rib 14 is attached to the outer peripheral surface of the pipe-shaped vertical member 3 along the vertical direction. The vertical ribs 14 have a narrow width extending vertically in the center of the outer peripheral surface excluding the upper and lower ends of the pipe-shaped vertical member 3, and are substantially equidistant from the outer peripheral surface of the pipe-shaped vertical member 3. 4 are attached. Two of them are provided with drain holes 14 a at two locations on the vertical rib 14. If comprised in this way, the intensity | strength of the pipe-shaped vertical member 3 by a simple structure, especially buckling intensity | strength etc. can be improved notably. As shown in FIG. 1, the vertical rib 14 is inserted into the vertical groove 1 e formed in the connection jig 1 when the pipe-shaped vertical member 3 and the connection jig 1 are fitted. become. The width, length, number, and the like of the vertical ribs 14 can be variously changed. The material is preferably the same material as that of the pipe-shaped vertical member 3, but may be a different material. Moreover, the vertical rib 14 may be attached to the inner peripheral surface side of the pipe-shaped vertical member 3, or may be integrally formed as a pipe-shaped vertical member with a rib from the beginning.

  The lateral member 2 is also made of resin, and as shown in FIGS. 1 and 3, end projections (not shown) that are inserted into and engaged with the through holes 1c of the connecting jig 1 are directed downward at both end portions on the back surface side. While forming, the recessed part opened toward the downward direction between the edge part protrusions is formed. As shown in FIG. 3, a shallow concave groove 2h extending in the longitudinal direction is formed on the top surface of the lateral member 2, and a drainage through hole 2f is formed at the bottom thereof. The shape, number, and the like of 2h can be changed as appropriate, and the number, diameter, and the like of the drain holes 2f can be changed as appropriate. However, compared with the case where the shape of the concave groove is a simple arc shape, when it is formed in a wave shape, the strength against deformation in the horizontal direction is increased.

  Then, the connection jig 1 is fitted and attached to the upper end of each of the pipe-like vertical members 3, and the connection jigs 1 attached to the two pipe-like vertical members 3 are connected to each other. The pipe-like vertical member 3 and the horizontal member 2 are connected to each other by inserting and engaging the end projections of the horizontal member 2 in the through holes 1c of the two connecting jigs 1 adjacent to each other. Is repeated to form a rainwater storage structure assembly A that constitutes a three-dimensional structure in a jungle gym shape.

The rainwater storage structure assembly A, which is a three-dimensional structure, preferably has a compressive strength of at least 108 kN / m ² or more. If it does in this way, even if it covers about 2m of covering soil (load: about 36 kN / m < ² >) in the uppermost part, it has sufficient intensity | strength which becomes 3 times or more of earth pressure. Specifically, when a pipe-shaped vertical member having a length of about 40 cm and a horizontal member having a length of 40 cm are combined, a pipe-shaped vertical member having 6.25 pieces / m ^{2 and} at least a compressive strength of about 17.28 kN / piece is obtained. Is used.

  In this way, rainwater is temporarily stored and used for various purposes such as watering gardens, washing water, emergency water, etc., and an adjustment function that can gradually discharge a large amount of rainwater is provided. be able to. And since the curing period etc. are unnecessary compared with the case where it comprises with concrete, the construction speed of a rainwater storage structure can be made markedly faster.

<Example of construction>
Next, an example in which the rainwater storage structure assembly A in which the rainwater storage structure assembly members according to this embodiment are assembled is applied to the rainwater storage structure will be described with reference to FIG.

  In forming the rainwater storage structure, first, a ground recess (hereinafter sometimes referred to as a pit) of about 1 to 5 m is excavated and formed in the ground, and a side groove 7 is formed around the pit, and a crushed stone is formed on the bottom surface of the pit. Laying and constructing sand, etc. and leveling it, form foundation B. After laying a water-impervious sheet 4 as a water-impervious material on the surface, the unit blocks shown in FIG. A jungle gym-shaped assembly for rainwater storage structure A is arranged according to the internal volume. When the internal volume of the pit is large, the rainwater storage structure assembly A may be assembled in the pit, or after the rainwater storage structure assembly A is assembled outside the pit, it is arranged in the pit. Also good. The rainwater storage structure assembly A thus assembled is preferably fastened and fixed by a belt made of resin or metal.

  Next, the side surface portion of the rainwater storage structure assembly A arranged in the pit is backfilled C as necessary, and a pipe 8 is laid so as to allow rainwater to flow from the side groove 7 into the pit. Furthermore, the water-impervious sheet 5 is covered on the upper surface, and about 0.5 to 1 m of earth and sand is covered from above to form the covered soil 6. These water-impervious sheet 5 and cover soil 6 on the upper surface form a coating layer. In addition, inspection holes may be provided at a plurality of locations of these coating layers 6. Instead of coating the water shielding sheet 5 on the upper surface of the rainwater storage structure assembly A, the rainwater may be permeated by coating a water permeable sheet. The side groove 7 is somewhat deep at the bottom so that a mud pool 9 is formed at the bottom.

The outer diameter of the central portion in the length direction as shown in FIG. 1 is about 60 mm (the outer diameter of the end portion expanded by about 0.5 ° from the free end to the position of 60 mm toward the central portion), and the thickness is about 4 mm. A polypropylene pipe-shaped vertical member (manufactured by Toyo Tire & Rubber Co., Ltd.) having a length of about 0.04 mm and a length of about 40 cm, a horizontal member made of polypropylene having a length of about 40 cm, and a connecting member, as shown in FIG. A rainwater storage structure assembly A having a length of about 1.6 m and a length and width of about 2.4 m was formed and placed in a pit having a predetermined internal volume of a depth of about 3.5 m to construct a rainwater storage structure. This polypropylene pipe-shaped longitudinal member has a compressive strength of about 140 kN / 4 (35 kN / piece) in the length direction. When 6.25 are used per 1 m ² , the compressive strength is about 219 kN / m ^2. Thus, even when the covering soil is 2 m (load: about 36 kN / m ² ), the compressive strength of about 6 times is obtained, and thus it can be seen that it is sufficiently practical.

  Moreover, even when 10% deformation (16 cm deformation with respect to a height of 160 cm) was applied from the horizontal direction, no breakage or disconnection occurred between the horizontal member and the connection member.

  Actually, a rainwater storage structure is constructed with a size of 0.8m x 0.4m x 0.4m (because one unit has a 0.4m pitch), and a weight corresponding to 2m covering soil is placed on top of it. More than a year has passed, but no deformation or other problems that caused problems in use occurred.

[Another embodiment]
(1) When assembling the rainwater storage structure assembly A, a square plate-like panel is horizontally fitted so as to be placed between the pipe-like vertical members 3 and placed on the horizontal member 2; You may make it raise the intensity | strength of the assembly A for rainwater storage structures while ensuring the flatness for improving assembly workability | operativity.

  (2) The strength of the rainwater storage structure assembly A can be improved by attaching a side panel to the outer periphery of the side surface of the rainwater storage structure assembly A. A locking portion that engages with the vertical rib 14 of the pipe-shaped vertical member 3 shown in FIG. 2 may be provided on the side portion of the side panel, and the two may be connected to each other. By attaching such a side panel to the outer peripheral portion of the side surface of the assembly A for rainwater storage structure or the side surface of the unit block as appropriate, it is possible to exert a great resistance against ground displacement or the like.

  (3) In the rainwater storage structure of the above-described embodiment, a convection generation mechanism that convects rainwater stored in the rainwater storage structure assembly A may be configured to be insertable through the inspection hole. As the convection generating mechanism, for example, a configuration in which a screw device is provided at the tip of the shaft, inserted into the rainwater storage structure assembly A, and the screw device is driven by an electric motor or the like can be considered.

  By this convection generating mechanism, the stored rainwater is agitated and convected, and the earth and sand adhering to the rainwater storage structure assembly A is dropped to the bottom, and the earth and sand accumulated on the bottom are Push toward the other side. Then, after collecting earth and sand in a recess lower than the bottom of the pit formed in advance on the other side where the assembly A for rainwater storage structure is arranged, a long hose or the like is provided through another inspection hole. Then, using a vacuum device that can be inserted into the recess, the soil is sucked and discharged to the outside. If it does in this way, the earth and sand deposited on the rainwater storage structure can be discharged | emitted effectively, the stored rainwater can be purified, and the utilization range of rainwater will be expanded.

  (4) Furthermore, the aeration apparatus may be configured to be inserted into the rainwater storage structure assembly A through the inspection hole. If it does in this way, fresh air will be taken in the rainwater stored inside, it will be aerated appropriately, and it will oxidize, thereby purifying rainwater and preventing deterioration of water quality.

  (5) The convection generating mechanism and the aeration apparatus may be configured to be detachable or fixed to a rainwater storage structure, and the power source used for these may be a portable power generation in addition to a commercial power source. Devices, batteries such as various primary batteries and secondary batteries can be used, and furthermore, solar cell power generators, wind power generators, etc. are installed on the ground part of rainwater storage structures, and the power obtained from them is used You may make it do.

  (6) In the case of the above-described embodiment, polypropylene is exemplified as a constituent material of the resin pipe-like vertical member. However, the material is not limited to this, and polyethylene, polyvinyl chloride, PET (polyethylene terephthalate) or the like is used. Alternatively, various thermoplastic resins can be used as long as the required strength is obtained. Furthermore, as a pipe-like vertical member, it can be replaced by a metal pipe such as stainless steel instead of resin, and is reinforced by injecting concrete into the resin pipe-like vertical member or inserting reinforced concrete. May be.

  (7) The pipe-shaped vertical member, the horizontal member, and the connection jig may be made of the same resin material, but may be made of different resin materials.

  (8) You may make it mix powdery calcium carbonate (carbon char) etc. in the constituent material of a resin pipe-like vertical member, a horizontal member, and a connection jig. In this way, the specific gravity of the constituent materials can be increased, the buoyancy that occurs when rainwater is stored can be resisted, special construction is not required as a buoyancy measure, and a larger amount of water can be stored even in a small space. It is preferable because it can be secured. Specifically, the specific gravity can be made 1.0 or more by mixing about 13% charcoal cal in the resin.

  (9) When mixed in the above constituent materials, whiskers such as talc and barium sulfate may be mixed instead of charcoal cal. These have a larger aspect ratio than charcoal cal and have a large effect of increasing strength. Furthermore, you may mix glass fiber in the said structural member. Glass fibers are preferable because they can not only increase the specific gravity of the constituent members but also increase the strength and dimensional stability. For example, when 4.6 wt% of glass fiber is added (30 parts added to 20 wt% masterbatch 100), the specific gravity is increased by 0.03, the strength is improved by 15%, and the shrinkage ratio is improved by 0.4% during molding. To do.

  The rainwater storage structure according to the present invention is not limited to the use as a tank for storing and using rainwater, but can also be used as a biotope or the like.

The perspective view which shows the unit block of the assembly member for rainwater storage structures concerning one Embodiment of this invention The perspective view of the pipe-shaped vertical member which comprises the assembly member for rainwater storage structures of FIG. The perspective view which shows the connection structure of a connection member and a horizontal member Schematic front sectional view of a rainwater storage structure using an assembly member for a rainwater storage structure according to an embodiment of the present invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Connection jig 1e Longitudinal groove 2 Horizontal member 3 Pipe-shaped vertical member 3a End part 5, 6 Covering layer 14 Rib A Three-dimensional structure

Claims (6)

A plurality of pipe-like vertical members having a predetermined length, a horizontal member for assembling a three-dimensional structure together with these pipe-like vertical members, and connectable to the pipe-like vertical member and the horizontal member, and the pipe-like vertical member And a connecting jig for connecting the horizontal member and the horizontal member, and forming the three-dimensional structure by assembling the pipe-shaped vertical member and the connecting jig and the horizontal member and the connecting jig together. In the rainwater storage structural member that enables the formation of a space inside,
When fitting the pipe-shaped vertical member and the connection jig, the outer peripheral surface of the end portion of the pipe-shaped vertical member in contact with the connection jig is subjected to squeezing, and the end of the pipe-shaped vertical member A member for a rainwater storage structure, wherein an inner peripheral surface of the connecting jig in contact with the pipe is formed to be smoother than a concavo-convex surface based on a wrinkle applied to an outer peripheral surface of an end portion of the pipe-shaped vertical member .   2. When fitting the pipe-shaped vertical member and the connection jig, the outer peripheral surface of the end portion of the pipe-shaped vertical member in contact with the connection jig is slightly expanded in diameter as the distance from the tip is increased. The member for rainwater storage structure as described.   3. The rainwater storage according to claim 1, wherein the unevenness on the outer periphery of the end of the pipe-shaped vertical member is 10 to 40 μm, and the unevenness on the inner peripheral surface of the connection jig is 1 μm or less. Structural member.   Ribs formed along the vertical direction are provided on the outer peripheral surface of the pipe-shaped vertical member, and the ribs of the pipe-shaped vertical member are inserted when the pipe-shaped vertical member and the connection jig are fitted. The member for rain water storage structures of any one of Claims 1-3 in which the possible vertical groove is formed in the said connection jig.   The connection between the horizontal member and the connection jig is made such that the end surface of the horizontal member and the outer peripheral surface of the connection jig face each other, and the end surface of the horizontal member cannot rotate around the connection jig. The member for rainwater storage structures according to any one of claims 1 to 4, wherein the member is for rainwater storage.   A rainwater storage structure comprising a three-dimensional structure assembled from the rainwater storage structure member according to any one of claims 1 to 5, wherein a covering layer is provided on an upper surface side of the three-dimensional structure.

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