JP5341722B2 - Rainwater storage and penetration facility - Google Patents

Description

  The present invention is a rainwater storage and infiltration facility in which a large number of unit members are connected by joints in three dimensions, and in particular, when the rainwater storage and infiltration facility is deformed due to an earthquake, the connection between the unit members and the joints is not removed. Related to the rainwater storage and penetration facility.

  In order to suppress the outflow of rainwater and prevent the occurrence of urban flood damage, as a structure that is assembled by connecting a large number of unit members such as tables, containers, or pipes by joints, for example, roads, Rainwater storage and penetration facilities are known that are installed in underground spaces of public facilities such as parks and parking lots. In this rainwater storage and infiltration facility, unit members that mainly support the load in the vertical direction are formed of a lightweight material such as plastic, and these unit members are three-dimensionally connected in the vertical and horizontal directions using joints. Is.

  The rainwater storage and penetration facility wraps the outside of the structure with water-permeable or water-impervious sheets, water-permeable and water-impervious sheets. Accordingly, a rainwater storage facility for storing rainwater in the internal space of the structure, a rainwater infiltration facility for infiltrating rainwater, or a rainwater storage and infiltration facility for storing and infiltrating rainwater are provided. In the specification and claims of the present invention, a rainwater storage facility, a rainwater infiltration facility, and a rainwater storage infiltration facility are collectively referred to as a rainwater storage infiltration facility.

  The rainwater storage and infiltration facility, which is made up of unit materials made of lightweight materials such as plastic, is an assembly type that uses a joint, so it is relatively easy to change even if it must be changed due to changes in conditions after installation. It is. On the other hand, it is difficult to change a concrete structure once installed. Furthermore, since it is an assembly type using a joint, there is an advantage that it does not require skill for construction and the construction period is short.

  The assembled rainwater storage and penetration facility using a conventional joint has sufficient load-bearing characteristics with respect to a load in the vertical direction. However, if the rainwater storage and penetration facility is greatly deformed due to a large earthquake, and the relative displacement between adjacent unit members becomes large, the connection between the joint and the unit member may be disconnected.

  The conventional rainwater storage and penetration facility described in Patent Literature 1 and Patent Literature 2 and the joints thereof are shown in FIGS. 13 is a side view showing a state in which a conventional rainwater storage and penetration facility is arranged in an underground space, FIG. 14 is a cross-sectional view taken along the line CC of FIG. 13, and FIGS. 15 (a) and 15 (b) are conventional rainwater storages. FIG. 15A is a part view showing a unit member of the infiltration facility, FIG. 15A is a plan view of the unit member, and FIG. 15B is a side view of a part of FIG. 16 (a) and 16 (b) are component diagrams showing a joint 31 of a conventional rainwater storage and penetration facility, FIG. 16 (a) is a plan view of the joint, and FIG. 16 (b) is a plan view of FIG. 16 (a). It is a side view.

  17 (a) and 17 (b) are enlarged views of the R portion of FIG. 13, FIG. 17 (a) is an enlarged vertical sectional view of the R portion, and FIG. 17 (b) is a plan view of FIG. 17 (a). Of the pair of upper and lower unit members connected by a conventional joint, the upper unit member is removed. 18 (a) and 18 (b) are component diagrams showing a joint 32 of a conventional rainwater storage and penetration facility, FIG. 18 (a) is a plan view of the joint, and FIG. 18 (b) is a plan view of FIG. 18 (a). It is a side view. 19 (a) and 19 (b) are component diagrams showing a joint 33 of a conventional rainwater storage and penetration facility, FIG. 19 (a) is a plan view of the joint, and FIG. 19 (b) is a plan view of FIG. 19 (a). It is a side view.

  20 (a) and 20 (b) are component diagrams showing a joint 34 of a conventional rainwater storage and penetration facility, FIG. 20 (a) is a plan view of the joint, and FIG. 20 (b) is a plan view of FIG. 20 (a). It is a side view. FIG. 21 is a side view showing a state in which an earthquake shake is transmitted to a conventional rainwater storage and penetration facility and the rainwater storage and penetration facility is deformed, and FIG. 22 is an enlarged vertical sectional view of an S portion of FIG. As shown in FIGS. 13 and 14, the conventional rainwater storage and penetration facility 1 is formed by stacking unit members 2 to form a three-dimensional structure. Here, “three-dimensional” means that the unit members 2 are connected in two directions perpendicular to each other in the horizontal direction, and further stacked in a multistage manner in the vertical direction.

  The unit members 2 of the rainwater storage and penetration facility 1 are stacked in 4 rows × 4 rows in two horizontal directions and in four rows in the vertical direction. The unit member 2 shown in FIGS. 15A and 15B shows a side view on the left side of the central axis 21 in FIG. 15B and a cross-sectional view on the right side. The unit member 2 is made of polypropylene and has corrosion resistance against water, durability against load, vibration and the like. The unit member 2 includes a base 22 formed on the upper side of FIG. 15B and legs 23 extending downward from the base 22.

  As shown in FIG. 15A, the base 22 has a substantially square shape when viewed from above, and square recesses 24 that are recessed from the flat surface 223 of the base 22 are provided at the four corners of the base 22. Further, an edge frame 221 extending downward in FIG. 15B is formed on the outer peripheral edge of the base 22. Reinforcing ribs 222 are provided in a lattice form between the edge frame 221 and the outer periphery of the legs 23.

  Each square recess 24 is provided with one engagement hole 241 extending parallel to the central axis 21 of the base 22. The engagement holes 241 extend in the vertical direction when the unit members 2 are stacked as shown in FIG. Joints 31, 32, 33, and 34 having engagement shafts 311 that can be fitted in the engagement holes 241 (FIGS. 16A and 16B, FIGS. 18A and 18B, and FIG. 19A). And (b) and the unit member 2 of the same shape and magnitude | size are connected via Fig.20 (a) and (b)).

  The leg 23 is located concentrically with the central axis 21 of the base 22, and its shape is a truncated conical cylinder shape, which is a cylindrical truncated cone shape whose diameter decreases toward the lower end 231 thereof. A circular opening 232A of the upper end 232 of the leg 23 is formed in the flat surface 223 of the base. The center of the circular opening 232A is concentric with the central axis 21. In addition, a circular opening 231A centering on the central axis 21 is formed at the lower end 231 of the leg. The leg 23 formed in the shape of a truncated conical cylinder is lightweight, rigid, and excellent in load resistance.

  The base 22 may have a hole (not shown) that allows one side and the other side to pass through. The size of the hole is set appropriately depending on the purpose and application of the rainwater storage and penetration facility 1. For example, when a filler is stored or filled in the base 22 and the legs 23, the size is set so that the filler does not fall out. Furthermore, when storing water, it is set as the magnitude | size which water moves easily up and down and left and right through this hole. Thus, by providing a hole in the base 22, the range of uses of the rainwater storage and penetration facility 1 is expanded.

  16 (a) and 16 (b) show the joint 31, which connects the bases 22 of the R part in FIG. 13 where the bases 22 are vertically stacked, and is closer to the inside of the rainwater storage and infiltration facility 1. The bases 22 positioned are connected to each other. In the joint 31, four engagement shafts 311 are formed at the corners of both surfaces of the plate-shaped member 312, four on one surface and a total of eight on both surfaces. The distal end side of the engagement shaft 311 is formed in a taper shape so that it can be easily inserted into the engagement hole 241 of the base 22. The thickness T1 of the plate-like member 312 is twice the depth S2 of the square recess 24 of the base 22. The joint 31 is formed of a rigid synthetic resin or the like.

  18 (a) and 18 (b) show a joint 32, which, like the joint 31, connects the bases 22 of the R portion in FIG. 13 where the bases 22 are superposed in the vertical direction. The bases 22 located near the outside of the infiltration facility 1 are connected to each other. A total of four engaging shafts 311 provided on the joint 32 are provided on both sides of the plate-like member 322, two on one side. Since the structure and operation of the other parts in FIGS. 18A and 18B are the same as those of the joint 31 in FIGS. 16A and 16B, description thereof is omitted.

  19 (a) and 19 (b) show the joint 33 and, like the joint 31, connect the bases 22 of the adjacent unit members 2 to each other. These are the bases 22 of the unit members 2 located at the uppermost or lowermost stage. Four engagement shafts 311 provided in the joint 33 are provided at one corner of the plate-like member 332. The thickness T2 of the plate member 332 is the same as the depth S2 of the square recess 24 of the base 22. Since the structure and operation of the other parts in FIGS. 19A and 19B are the same as the joint 31 in FIGS. 16A and 16B, the description thereof is omitted.

  20 (a) and 20 (b) show the joint 34 and, like the joint 31, connect the bases 22 of the adjacent unit members 2 to each other. These are the bases 22 of the unit members 2 located at the uppermost or lowermost stage. The joint 34 is used only to connect the bases 22 located near the outside of the rainwater storage and penetration facility 1. Two engaging shafts 311 provided in the joint 34 are provided at one corner of the plate-like member 342. The thickness T2 of the plate-like member 342 is the same as the depth S2 of the square recess 24 of the base 22. Since the structure and operation of the other parts in FIGS. 20A and 20B are the same as the joint 31 in FIGS. 16A and 16B, the description thereof is omitted.

  The unit member 2 is arranged with the substantially flat surface 223 of the base 22 facing upward or downward. At this time, one of the joints 31, 32, 33, and 34 is connected to the square recess 24 provided on the base 22 of the unit member 2. That is, one engagement shaft 311 of the joints 31, 32, 33, and 34 is fitted and connected to the engagement hole 241 of the square recess 24. Thereby, the several unit member 2 is connected. In this case, the unit members 2 that are in the vertical relationship are stacked with their bases 22 or the lower ends 231 of the legs 23 aligned.

  17A and 17B show a state in which a joint 31 is connected to a square recess 24 provided in the base 22 of the unit member 2. Since the base 22 of the unit member 2 is formed in a rectangular shape, the joint 31 connects the bases 22 of the eight adjacent unit members 2. Thus, when the unit member 2 is connected by the joints 31, 32, 33 and 34, a space is formed inside the leg 23 of the unit member 2 and between the adjacent unit members 2. This space is used as a space for storing water.

  When a large earthquake shake (for example, a horizontal earthquake shake indicated by the black arrow 11 in FIG. 21) is transmitted to the conventional rainwater storage and penetration facility 1 configured as described above, as shown in FIG. A horizontal displacement δ1 occurs between the upper end and the lower end of the storage and penetration facility 1, and the rainwater storage and penetration facility 1 is inclined by an angle θ1 with respect to the vertical direction.

  As a result, as shown in FIG. 22, when the relative displacement between the adjacent unit members 2 in the vertical direction and the horizontal direction becomes large, the plate-like members 312 and 322 of the joints 31 and 32 break, and the joints The connection between 31 and 32 and the unit member 2 may be disconnected. Further, even when the plate-like members 312 and 322 are so rigid that the plate-like members 312 and 322 are not broken, the engagement shaft 311 of the joints 31 and 32 comes out of the engagement hole 241 of the unit member 2. As a result, the coupling between the joints 31 and 32 and the unit member 2 may be disconnected.

  As a result, the strength of the rainwater storage and infiltration facility 1 may not be restored after the strength of the rainwater storage and infiltration facility 1 in the horizontal direction is reduced or the shaking of the earthquake has subsided. There was a risk of falling.

JP 2002-309658 A Japanese Patent No. 4153600

  An object of the present invention is to provide a rainwater storage and infiltration facility in which a joint that connects unit members is broken or a joint is not detached from the unit member even when the rainwater storage and infiltration facility is greatly deformed by a large earthquake. There is to do.

  The said subject is solved by the following means. That is, the rainwater storage and penetration facility according to the first aspect of the present invention is such that a plurality of unit members that can be disposed adjacent to each other in the vertical direction and the horizontal direction in the underground space are relatively displaced in the horizontal direction. In the rainwater storage and infiltration facility constituted by a joint that connects adjacent unit members, the unit member is formed on the periphery of the unit member corresponding to the plurality of unit members adjacent to the unit member. A plurality of engagement holes extending in the vertical direction, and formed in the joint, and can be fitted in the engagement holes of the adjacent unit members, respectively, and formed in the joint. The adjacent engaging shafts are connected to each other, and the adjacent engaging shafts are made of an elastically deformable portion that allows relative displacement in the vertical direction and / or the horizontal direction. Unit member is relatively When the elastic deformation portion of the joint is elastically deformed, the adjacent engagement shafts are relatively displaced in the vertical direction and / or the horizontal direction, and the engagement shaft and the engagement hole are fitted. It is characterized by maintaining.

The rainwater storage and penetration facility of the second invention is the rainwater storage and penetration facility of the first invention,
The elastically deforming portion is formed by bending in a curved line within a plane parallel to a plane passing through the central axis of the adjacent engaging shaft.
The rainwater storage and penetration facility according to a third aspect of the present invention is the rainwater storage and penetration facility according to the first aspect of the present invention, wherein once the engagement shaft is fitted into the engagement hole, the engagement shaft comes out of the engagement hole. A retaining portion for preventing the contact is formed in the engagement shaft and the engagement hole.

The rainwater storage and penetration facility of the fourth invention is the rainwater storage and penetration facility of the third invention.
The retaining portion is formed on the front end side of the engagement shaft and has a large diameter portion that fits into the engagement hole with an interference fit. And a step portion formed on the engagement shaft at a connection portion between the large diameter portion and the small diameter portion, and the step portion is engaged with an end surface of the engagement hole on the side opposite to the opening. In addition, the engagement shaft is prevented from coming out of the engagement hole.

  The rainwater storage and penetration facility according to a fifth aspect of the invention is the rainwater storage and penetration facility according to the fourth aspect of the invention, on the circumference of the outer peripheral surface of the large diameter portion or on the circumference of the inner peripheral surface of the engagement hole. Is characterized in that a plurality of small protrusions are formed that are line-contacted and fit-fit.

  The rainwater storage and infiltration facility according to the present invention is formed on the periphery of the unit member corresponding to the plurality of unit members adjacent to the unit member, and is formed in and adjacent to the plurality of engagement holes extending in the vertical direction. A plurality of engagement shafts that can be fitted in the engagement holes of the unit member and extend in the vertical direction, and are formed in a joint to connect the adjacent engagement shafts to each other. The adjacent engagement shafts are in the vertical direction and the horizontal direction. It is comprised from the elastic deformation part which enables it to shift | deviate relatively. Therefore, when the adjacent unit members are relatively displaced due to an earthquake, the elastically deforming portion of the joint is elastically deformed, and the adjacent engagement shafts are relatively displaced in the vertical direction and the horizontal direction. The fitting with the engagement hole is maintained. Therefore, even when the deformation of the rainwater storage and penetration facility is increased due to a large earthquake, the joint connecting the unit members is not broken or the joint is not detached from the unit members.

  In the rainwater storage and penetration facility of the present invention, once the engagement shaft is fitted into the engagement hole, the retaining portion that prevents the engagement shaft from coming out of the engagement hole is provided on the engagement shaft and the engagement hole. Is formed. Therefore, even if the deformation of the rainwater storage and penetration facility becomes large due to a large earthquake shake, the engagement shaft of the joint does not come out of the engagement hole of the unit member.

  Further, the rainwater storage and penetration facility according to the present invention includes a plurality of small protrusions that fit in a line-contact manner on the circumference of the outer peripheral surface of the large diameter portion or the inner peripheral surface of the engagement hole. Is formed. Therefore, even if there are some manufacturing errors in the outer diameter dimension of the large diameter part and the inner diameter dimension of the engagement hole, the large diameter part of the engagement shaft can be fitted into the engagement hole with an interference fit. Costs can be reduced.

1 (a) and 1 (b) are component diagrams showing a joint of the rainwater storage and penetration facility according to the first embodiment of the present invention, FIG. 1 (a) is a plan view of the joint, and FIG. 1 (b). FIG. 2 is a side view of FIG. FIG. 2 is a cross-sectional view taken along line AA in FIG. 3 (a) and 3 (b) are component diagrams showing another joint of the rainwater storage and infiltration facility according to the first embodiment of the present invention. FIG. 3 (a) is a plan view of the joint, and FIG. FIG. 3B is a side view of FIG. 4 (a) and 4 (b) are component diagrams showing a unit member of the rainwater storage and infiltration facility according to the first embodiment of the present invention. FIG. 4 (a) is a plan view of the unit member, and FIG. FIG. 4B is a side view of a part of FIG. FIG. 5 is a side view showing a state in which the rainwater storage and penetration facility according to the first embodiment of the present invention is arranged in an underground space. 6 is a cross-sectional view taken along line BB in FIG. 7 (a) and 7 (b) are enlarged views of part P in FIG. 5, FIG. 7 (a) is an enlarged vertical sectional view of part P, and FIG. 7 (b) is a plan view of FIG. 7 (a). Of the pair of upper and lower unit members connected by the joint of the first embodiment, the upper unit member is removed. FIG. 8 is a side view showing a state in which an earthquake shake is transmitted to the rainwater storage and penetration facility according to the first embodiment of the present invention and the rainwater storage and penetration facility is deformed. FIG. 9 is an enlarged vertical sectional view of a Q portion in FIG. FIGS. 10A and 10B are views corresponding to FIGS. 7A and 7B showing the second embodiment of the present invention, and FIG. 10A is an enlarged longitudinal sectional view, FIG. 10 (b) is a plan view of FIG. 10 (a) and shows a state in which the upper unit member is removed from the pair of upper and lower unit members connected by the joint of the second embodiment. . 11 (a) and 11 (b) show the main part of the unit member of the second embodiment of the present invention, FIG. 11 (a) is an enlarged longitudinal sectional view, and FIG. 11 (b) is FIG. 11 (a). ), And shows a state in which the upper four unit members are removed from the upper and lower pair of eight unit members connected by the joint according to the second embodiment. FIG. 12 is a view corresponding to FIG. 9 showing a state in which the earthquake shake is transmitted to the rainwater storage and penetration facility according to the second embodiment of the present invention and the rainwater storage and penetration facility is deformed. FIG. 13: is a side view which shows the state which has arrange | positioned the conventional rainwater storage penetration facility in underground space. 14 is a cross-sectional view taken along the line CC of FIG. 15 (a) and 15 (b) are component diagrams showing a unit member of a conventional rainwater storage and penetration facility, FIG. 15 (a) is a plan view of the unit member, and FIG. 15 (b) is FIG. 15 (a). FIG. 16 (a) and 16 (b) are component diagrams showing a joint 31 of a conventional rainwater storage and penetration facility, FIG. 16 (a) is a plan view of the joint, and FIG. 16 (b) is a plan view of FIG. 16 (a). It is a side view. 17 (a) and 17 (b) are enlarged views of the R portion of FIG. 13, FIG. 17 (a) is an enlarged vertical sectional view of the R portion, and FIG. 17 (b) is a plan view of FIG. 17 (a). Of the pair of upper and lower unit members connected by a conventional joint, the upper unit member is removed. 18 (a) and 18 (b) are component diagrams showing a joint 32 of a conventional rainwater storage and penetration facility, FIG. 18 (a) is a plan view of the joint, and FIG. 18 (b) is a plan view of FIG. 18 (a). It is a side view. 19 (a) and 19 (b) are component diagrams showing a joint 33 of a conventional rainwater storage and penetration facility, FIG. 19 (a) is a plan view of the joint, and FIG. 19 (b) is a plan view of FIG. 19 (a). It is a side view. 20 (a) and 20 (b) are component diagrams showing a joint 34 of a conventional rainwater storage and penetration facility, FIG. 20 (a) is a plan view of the joint, and FIG. 20 (b) is a plan view of FIG. 20 (a). It is a side view. FIG. 21 is a side view showing a state in which an earthquake shake is transmitted to a conventional rainwater storage and penetration facility and the rainwater storage and penetration facility is deformed. FIG. 22 is an enlarged vertical sectional view of the S part in FIG.

  DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, a first embodiment of the invention will be described with reference to the drawings. 4 (a) and 4 (b) are component diagrams showing the unit member 5 of the rainwater storage and penetration facility 4 according to the first embodiment of the present invention, and FIG. 4 (a) is a plan view of the unit member 5. FIG. 4B is a side view of a part of FIG. FIG. 5 is a side view showing a state in which the rainwater storage and penetration facility 4 according to the first embodiment of the present invention is arranged in an underground space, and FIG. 6 is a cross-sectional view taken along line BB in FIG. As shown in FIGS. 5 and 6, the rainwater storage and penetration facility 4 according to the first embodiment of the present invention is similar to the conventional rainwater storage and penetration facility 1 in that the unit members 5 are arranged in two directions orthogonal to each other in the horizontal direction. They are connected and further stacked in multiple stages in the vertical direction to form a three-dimensional structure.

  As in the case of the conventional rainwater storage and penetration facility 1, the unit members 5 of the rainwater storage and penetration facility 4 are stacked in 4 rows × 4 rows in two horizontal directions and in four stages in the vertical direction. The shape of the unit member 5 is a side view on the left side of the central axis 51 in FIG. 4B and a cross-sectional view on the right side. The unit member 5 is made of polypropylene like the conventional unit member 2 and has durability against water, corrosion resistance, load, vibration and the like. As shown in FIG. 4B, the unit member 5 includes a base 52 formed on the upper side and legs 53 extending downward from the base 52.

  The leg 53 is located concentrically with the central axis 51 of the base 52, and its shape is a truncated conical cylinder shape, which is a cylindrical truncated cone shape whose diameter decreases toward the lower end 531 thereof. A circular opening 532 </ b> A of the upper end 532 of the leg 53 is formed in the flat surface 523 of the base 52. The center of the circular opening 532A is concentric with the central axis 51. In addition, a circular opening 531A centering on the central axis 51 is formed at the lower end 531 of the leg 53. The legs 53 formed in a truncated conical cylinder shape are lightweight, rigid and have excellent load resistance.

  The board | substrate 52 is good to have the hole which is not shown in figure letting it pass through one side and the other side. The size of the hole is set appropriately depending on the purpose and application of the rainwater storage and penetration facility 4. For example, when a filling material is stored or filled in the base 52 and the legs 53, the size is set such that the filling material does not fall out. Furthermore, when storing water, it is set as the magnitude | size which water moves easily up and down and left and right through this hole. Thus, by providing a hole in the base 52, the range of uses of the rainwater storage and penetration facility 4 can be expanded.

  As shown in FIG. 4A, the base 52 has a substantially square shape when viewed from above, and square recesses 54 that are recessed from the flat surface 523 of the base 52 are provided at the four corners of the base 52. Further, an edge frame 521 extending downward in FIG. 4B is formed on the outer peripheral edge of the base 52. Reinforcing ribs 522 are provided in a lattice form between the edge frame 521 and the outer periphery of the legs 53.

  Each square recess 54 is provided with one engagement hole 541 extending parallel to the central axis 51 of the base 52. The engaging hole 541 extends in the vertical direction when the unit members 5 are stacked as shown in FIG. The connection between the bases 52 of the unit members 5 located at the uppermost stage or the lowermost stage of the rainwater storage and infiltration facility 4 of the present invention is performed using conventional joints 33 and 34 (FIGS. 19A and 19B, FIG. a) and (b)). The conventional joints 33 and 34 have an engagement shaft 311 that can be fitted into the engagement hole 541.

  The thickness T2 of the plate-like member 332 of the joint 33 is the same as the depth S2 of the square recess 54 of the base 52. The thickness T2 of the plate-like member 342 of the joint 34 is the same as the depth S2 of the square recess 54 of the base 52. Further, the joint 34 is used only for connecting the bases 52 located near the outside of the rainwater storage and penetration facility 4.

  FIGS. 1A and 1B are component diagrams showing a joint 61 of the rainwater storage and penetration facility 4 according to the first embodiment of the present invention. FIG. 1A is a plan view of the joint 61, FIG. FIG. 2B is a side view of FIG. FIG. 2 is a cross-sectional view taken along line AA in FIG. 7 (a) and 7 (b) are enlarged views of part P in FIG. 5, FIG. 7 (a) is an enlarged vertical sectional view of part P, and FIG. 7 (b) is a plan view of FIG. 7 (a). The state which removed the upper unit member 5 among a pair of upper and lower unit members 5 connected by the coupling 61 is shown. The joint 61 connects the bases 52 of the P part of FIG. 5 where the bases 52 are stacked in the vertical direction, and connects the bases 52 positioned closer to the inside of the rainwater storage and penetration facility 4.

  In the joint 61, four substantially rectangular plate-like members 612 are arranged point-symmetrically, and one plate on each side of each plate-like member 612 is formed with two columnar engagement shafts 611 in total. . Therefore, as the joint 61, four engagement shafts 611 are formed in total on the one side and four sides. The distal end side of the engagement shaft 611 is formed in a taper shape so that it can be easily inserted into the engagement hole 541 of the base 52. The thickness T3 of the plate-like member 612 is slightly smaller than the depth S2 of the square recess 54 of the base 52. The joint 61 is formed of polypropylene (PP) that is very strong against bending, polycarbonate (PC) that has high tensile and compressive strength, and strong impact resistance.

  Between the plate-like members 612 adjacent to each other, an elastic deformation portion 613 is formed integrally with the plate-like member 612. The thickness T4 of the elastic deformation portion 613 is slightly smaller than the thickness T3 of the plate-like member 612. The elastically deforming portion 613 is bent in a curved manner (in a convex arc shape on the upper side in FIG. 1B) in a plane parallel to a plane passing through the central axes 614 and 614 of the adjacent engagement shafts 611 and 611. Is formed. Therefore, when the adjacent unit members 5 are relatively displaced due to an earthquake, the elastic deformation portion 613 is elastically deformed, and the adjacent engagement shafts 611 can be relatively displaced in the vertical direction and the horizontal direction. ing. A circular through hole 619 is formed at the intersection of the four elastically deformable portions 613. The through hole 619 is drilled in a direction orthogonal to the paper surface in FIG.

  A large diameter portion 615, a stepped portion 616, and a small diameter portion 617 are formed on the engagement shaft 611 in order from the distal end side of the engagement shaft 611. The large-diameter portion 615 is formed on the distal end side of the engagement shaft 611 and has an outer diameter that fits into the engagement hole 541 of the base 52 with an interference fit. Four small protrusions 615 </ b> A are formed on the outer peripheral surface of the large diameter portion 615. The small protrusions 615A are formed on the circumference of the large-diameter portion 615 at intervals of 90 degrees, and are formed over substantially the entire length of the large-diameter portion 615 in the axial direction in parallel to the central axis 614 of the engagement shaft 611.

  The small protrusion 615A is a structure for facilitating the manufacture of the joint 61 and reducing the manufacturing cost. That is, since the tip of the small protrusion 615A is in line contact with the inner peripheral surface of the engagement hole 541, the large-diameter portion 615 of the engagement shaft 611 is formed even if there is some manufacturing error in the outer diameter of the large-diameter portion 615. The engagement hole 541 is easily inserted with a moderate fit. The small-diameter portion 617 is formed on the rear end side of the engagement shaft 611 and has an outer diameter dimension that fits into the engagement hole 541 of the base 52 with a clearance fit. The step portion 616 is formed at a connection portion between the large diameter portion 615 and the small diameter portion 617.

  Further, as shown in FIG. 2, a blind hole 618 that opens to the front end side of the engagement shaft 611 and extends to the rear end side of the engagement shaft 611 is formed in the shaft center of the engagement shaft 611. Accordingly, when the engagement shaft 611 of the joint 61 is inserted into the engagement hole 541 of the base 52, the large diameter portion 615 is easily elastically deformed and reduced in diameter, and the engagement shaft 611 is easily inserted into the engagement hole 541. ing. Further, when the adjacent unit members 5 are relatively displaced due to the earthquake, the stepped portion 616 engages with the end surface 542 on the opposite side of the engagement hole 541 and the engagement shaft 611 is engaged with the engagement hole 541. Stop getting out of.

  3 (a) and 3 (b) show a joint 62, which, like the joint 61, connects the bases 52 of the P part in FIG. It is used to connect the bases 52 located near the outside of the facility 4. Similar to the joint 61, two substantially rectangular plate-like members 612 are arranged point-symmetrically at the joint 62, and one side of each plate-like member 612 is formed on one side and a total of two engagement shafts 611 are formed on both sides. Has been. Accordingly, the joint 62 has a total of four engaging shafts 611 on two sides and on both sides.

  The distal end side of the engagement shaft 611 is formed in a taper shape so that it can be easily inserted into the engagement hole 541 of the base 52. The thickness T3 of the plate-like member 612 is slightly smaller than the depth S2 of the square recess 54 of the base 52. The joint 62 is made of polypropylene (PP) that is very resistant to bending, polycarbonate (PC) that has high tensile and compressive strength, and strong impact resistance.

  Between the adjacent plate-like members 612, similarly to the joint 61, an elastic deformation portion 613 is formed integrally with the plate-like member 612. The thickness T4 of the elastic deformation portion 613 is slightly smaller than the thickness T3 of the plate-like member 612. The elastically deforming portion 613 is bent in a curved manner (in a convex arc shape on the upper side as viewed in FIG. 3B) in a plane parallel to a plane passing through the central axes 614 and 614 of the adjacent engaging shafts 611 and 611. Is formed. Therefore, when the adjacent unit members 5 are relatively displaced due to an earthquake, the elastic deformation portion 613 is elastically deformed, and the adjacent engagement shafts 611 can be relatively displaced in the vertical direction and the horizontal direction. ing.

  The shape of the engagement shaft 611 is exactly the same as that of the joint 61, and a large-diameter portion 615, a step portion 616, and a small-diameter portion 617 are formed in order from the distal end side of the engagement shaft 611. Therefore, when the engagement shaft 611 of the joint 62 is inserted into the engagement hole 541 of the base 52, the large diameter portion 615 is easily elastically deformed and reduced in diameter so that the engagement shaft 611 can be easily inserted into the engagement hole 541. ing. Further, when the adjacent unit members 5 are relatively displaced due to the earthquake, the stepped portion 616 engages with the end surface 542 on the opposite side of the engagement hole 541 and the engagement shaft 611 is engaged with the engagement hole 541. Stop getting out of. 3A and 3B are the same as the joint 61 in FIGS. 1A and 1B and FIG.

  7A and 7B show a state in which the joint 61 is connected to a square recess 54 provided in the base 52 of the unit member 5. Since the base 52 of the unit member 5 is formed in a rectangular shape, the joint 61 connects the bases 52 of the eight adjacent unit members 5. Although not shown, the joint 62 connects the bases 52 of the four adjacent unit members 5.

  When a large earthquake shake (for example, a horizontal earthquake shake indicated by the black arrow 41 in FIG. 8) is transmitted to the rainwater storage and penetration facility 4 of the first embodiment of the present invention configured as described above, As shown in FIG. 8, a horizontal displacement δ2 occurs between the upper end and the lower end of the rainwater storage and penetration facility 4, and the rainwater storage and penetration facility 4 is inclined by an angle θ2 with respect to the vertical direction.

  As a result, as shown in FIG. 9, when the relative deviation between the vertical direction and the horizontal direction occurs between the adjacent unit members 5, the elastically deforming portions 613 of the joints 61 and 62 are elastically deformed and adjacent to each other. The engagement shaft 611 is displaced in the vertical direction and the horizontal direction, and the engagement between the engagement shaft 611 and the engagement hole 541 is maintained.

  Further, when the adjacent unit members 5 are relatively displaced due to an earthquake, the stepped portion 616 of the engagement shaft 611 of the joints 61 and 62 is engaged with the end surface 542 of the engagement hole 541 on the side opposite to the opening. The engagement shaft 611 is prevented from coming out of the engagement hole 541. Therefore, even if a large shift occurs in the vertical direction and the horizontal direction between adjacent unit members 5 due to a large earthquake shake, the coupling between the joints 61 and 62 and the unit member 5 is not released. As a result, after the shaking of the earthquake has subsided, the shape of the rainwater storage and penetration facility 4 returns to its original shape, and the durability of the rainwater storage and penetration facility 4 is maintained.

  Next, the joint 63 according to the second embodiment will be described. FIGS. 10A and 10B are views corresponding to FIGS. 7A and 7B showing the second embodiment of the present invention, and FIG. 7A is an enlarged longitudinal sectional view, FIG. 7 (b) is a plan view of FIG. 7 (a), in which the upper unit member 5 'is removed from the pair of upper and lower unit members 5' connected by the joint 63 of the second embodiment. Indicates. 11 (a) and 11 (b) show the main part of the unit member 5 'according to the second embodiment of the present invention, FIG. 11 (a) is an enlarged longitudinal sectional view, and FIG. 11 (b) is FIG. It is a top view of (a), Comprising: The state which removed the upper four unit members 5 'among a pair of upper and lower eight unit members 5' connected by the coupling 63 of 2nd Embodiment. Show. FIG. 12 is a view corresponding to FIG. 9 showing a state in which the earthquake shake is transmitted to the rainwater storage and penetration facility according to the second embodiment of the present invention and the rainwater storage and penetration facility is deformed.

  The second embodiment is an example in which a small protrusion for easily inserting the engagement shaft into the engagement hole is formed in the engagement hole, and the elastic deformation amount of the elastic deformation portion is increased. A joint 63 shown in FIGS. 10A and 10B to FIG. 12 is a joint corresponding to the joint 61 of the first embodiment, and is used at the same place as the place where the joint 61 is used. In the description of the second embodiment, illustration and description of the joint corresponding to the joint 62 of the first embodiment are omitted.

  In the joint 63, four substantially rectangular plate-like members 632 are arranged point-symmetrically, and one side of each plate-like member 632 is formed on one side, and two columnar engaging shafts 631 in total on both sides are formed. . Accordingly, as the joint 63, four engagement shafts 631 are formed on one side and four sides in total. The distal end side of the engagement shaft 631 is formed in a taper shape so that it can be easily inserted into the engagement hole 541 of the base 52. The thickness T5 of the plate member 632 is the same as the thickness T3 of the joint 61 of the first embodiment, and is slightly smaller than the depth S2 of the square recess 54 of the base 52. The joint 63 is formed of polypropylene (PP) that is very strong against bending, polycarbonate (PC) that has high tensile and compressive strength, and strong impact resistance.

  Between the adjacent plate-like members 632, an elastic deformation portion 633 is formed integrally with the plate-like member 632. The thickness T6 of the elastic deformation portion 633 is smaller than the thickness T4 of the elastic deformation portion 613 of the joint 61 of the first embodiment and smaller than the thickness T5 of the plate-like member 632. The elastic deformation portion 633 is curved in a plane parallel to a plane passing through the central axes 634 and 634 of the adjacent engagement shafts 631 and 631 (see FIG. 10A, both sides in the horizontal direction protrude downward). Are bent in a circular arc shape, and the central portion thereof is bent in an upwardly convex circular arc shape). A circular through hole 639 is formed at the intersection of the four elastic deformation portions 633. The through hole 639 is drilled in the direction orthogonal to the paper surface in FIG. Therefore, when the adjacent unit members 5 ′ are relatively displaced due to an earthquake, the elastic deformation portion 633 is elastically deformed, and the elastic deformation amount of the elastic deformation portion 633 is greater than that of the joint 61 of the first embodiment. Therefore, it is possible to ensure a large amount that the adjacent engaging shafts 631 are relatively displaced in the vertical direction and the horizontal direction.

  A large diameter portion 635, a step portion 636, and a small diameter portion 637 are formed on the engagement shaft 631 in order from the distal end side of the engagement shaft 631. The large diameter portion 635 is formed on the distal end side of the engagement shaft 631 and has an outer diameter dimension that fits into the engagement hole 541 of the base 52 with an interference fit. As shown in FIGS. 11A and 11B, four small protrusions 541 </ b> A are formed on the inner peripheral surface of the engagement hole 541 of the base 52. The small protrusions 541A are formed at intervals of 90 degrees on the circumference of the inner peripheral surface of the engagement hole 541, and are formed over substantially the entire length in the axial direction of the engagement hole 541 in parallel with the axis of the engagement hole 541. .

  The small protrusion 541A has a structure for facilitating the manufacture of the joint 63 and the unit member 5 'and reducing the manufacturing cost. That is, since the tip of the small protrusion 541A is in line contact with the outer peripheral surface of the large diameter portion 635, even if there are some manufacturing errors in the outer diameter size of the large diameter portion 635 and the inner diameter size of the engagement hole 541, the engagement shaft The large diameter portion 635 of 631 is easily inserted into the engagement hole 541. The small diameter portion 637 is formed on the rear end side of the engagement shaft 631 and has an outer diameter dimension that fits into the engagement hole 541 of the base 52 with a clearance fit. The step portion 636 is formed at a connection portion between the large diameter portion 635 and the small diameter portion 637.

  In addition, a blind hole 638 that opens to the front end side of the engagement shaft 631 and extends to the rear end side of the engagement shaft 631 is formed in the shaft center of the engagement shaft 631. Therefore, when the engagement shaft 631 of the joint 63 is inserted into the engagement hole 541 of the base 52, the large diameter portion 635 is easily elastically deformed and reduced in diameter so that the engagement shaft 631 can be easily inserted into the engagement hole 541. ing. Further, when the adjacent unit members 5 ′ are relatively displaced due to the shaking of the earthquake, the stepped portion 636 is engaged with the end surface 542 on the opposite side of the engagement hole 541, and the engagement shaft 631 is engaged with the engagement hole. Block out of 541. Since the structure and operation of other parts in FIGS. 10A and 10B and FIGS. 11A and 11B are the same as those of the joint 61 of the first embodiment, detailed description thereof is omitted.

  When a large earthquake is transmitted to the rainwater storage and penetration facility connected using the joint 63 according to the second embodiment of the present invention configured as described above, similarly to FIG. 8 of the first embodiment. The rainwater storage and penetration facility is inclined with respect to the vertical direction.

  As a result, as shown in FIG. 12, when the relative displacement between the vertical direction and the horizontal direction occurs between the adjacent unit members 5 ′, the elastic deformation portion 633 of the joint 63 is elastically deformed, and the adjacent engagement member The combined shaft 631 is displaced in the vertical direction and the horizontal direction, and the engagement between the engagement shaft 631 and the engagement hole 541 is maintained. Since the joint 63 according to the second embodiment of the present invention can secure a large amount of elastic deformation of the elastic deformation portion 633, the joint 63 is broken even if the adjacent engagement shaft 631 is greatly displaced in the vertical direction and the horizontal direction. Thus, the connection between the joint 63 and the unit member 5 'is not released.

  Further, when adjacent unit members 5 ′ are relatively displaced due to an earthquake, the stepped portion 636 of the engagement shaft 631 of the joint 63 is engaged with the end surface 542 on the opposite side of the engagement hole 541, The engagement shaft 631 is prevented from coming out of the engagement hole 541. Therefore, even if a large shift occurs in the vertical direction and the horizontal direction between the adjacent unit members 5 ′ due to a large earthquake shake, the connection between the joint 63 and the unit member 5 ′ is not disconnected. As a result, after the shaking of the earthquake has subsided, the shape of the rainwater storage and penetration facility is restored, and the durability of the rainwater storage and penetration facility is maintained.

  The joints 61, 62, and 63 of the embodiment of the present invention connect the four corners of the base 52 of the unit member, but may connect the central portions of each side of the base 52 of the unit member. Further, the unit members 5 and 5 'according to the embodiment of the present invention have one leg 53, but may have a plurality of legs. The joints 61, 62, 63 described in the embodiment of the present invention have been described in connection with the example where the base 52 of the unit member is overlapped in the vertical direction, but the uppermost stage of the rainwater storage and infiltration facility, or It may be applied to the connection between the bases 52 of the unit members located at the lowest level.

DESCRIPTION OF SYMBOLS 1 ... Rainwater storage penetration facility 11 ... Earthquake shake 2 ... Unit member 21 ... Center axis 22 ... Base 221 ... Edge frame 222 ... Rib 223 ... Flat surface 23 ... Leg 231 ... Lower end 231A ... Circular opening 232 ... Upper end 232A ... Circular opening 24 ... Square depression 241 ... Engagement hole 31, 32, 33, 34 ... Joint 311 ... Engagement shaft 312 ... Plate member 322 ... Plate member 332 ... Plate member 342 ... Plate member 4 ... Rainwater Storage penetrating facility 41: Earthquake shaking 5, 5 '... Unit member 51 ... Center axis 52 ... Base 521 ... Edge frame 522 ... Rib 523 ... Flat surface 53 ... Leg 531 ... Lower end 531A ... Circular opening 532 ... Upper end 532A ... Circular opening 54 ... Square depression 541 ... Engagement hole 541A ... Small protrusion 542 ... End face 61, 62, 63 ... Joint 611 ... Engagement shaft 612 ... Plate-like member 61 ... elastic deformation part 614 ... central axis 615 ... large diameter part 615A ... small protrusion 616 ... step part 617 ... small diameter part 618 ... blind hole 619 ... through hole 631 ... engagement shaft 632 ... plate-like member 633 ... elastic deformation part 634 ... Center axis 635 ... Large diameter part 636 ... Step part 637 ... Small diameter part 638 ... Blind hole 639 ... Through hole

Claims (5)

In the underground space, a plurality of unit members that can be arranged adjacent to each other in the vertical direction and the horizontal direction,
In order to prevent the adjacent unit members from being displaced relative to each other in the horizontal direction, in a rainwater storage and penetration facility constituted by a joint that connects the adjacent unit members,
A plurality of engagement holes formed on the periphery of the unit member corresponding to the plurality of unit members adjacent to the unit member and extending in the vertical direction;
A plurality of engaging shafts formed in the joint and capable of being respectively fitted in the engaging holes of the adjacent unit members and extending in the vertical direction;
It is formed in the joint, and includes an elastic deformation portion that connects the adjacent engagement shafts and allows the adjacent engagement shafts to be relatively displaced in the vertical direction and / or the horizontal direction,
When the adjacent unit members are relatively displaced due to an earthquake, the elastic deformation portion of the joint is elastically deformed, and the adjacent engagement shaft is relatively displaced in the vertical direction and / or the horizontal direction, The rainwater storage and penetration facility is characterized in that the engagement between the engagement shaft and the engagement hole is maintained. In the rainwater storage and penetration facility according to claim 1,
The elastic deformation part is
A rainwater storage and infiltration facility characterized by being bent and curved in a plane parallel to a plane passing through the central axis of the adjacent engagement shaft. In the rainwater storage and penetration facility according to claim 1,
Once the engagement shaft is fitted into the engagement hole, a retaining portion for preventing the engagement shaft from coming out of the engagement hole is formed in the engagement shaft and the engagement hole. Rainwater storage and penetration facility characterized by In the rainwater storage and penetration facility according to claim 3,
The retaining portion is
A large-diameter portion formed on the distal end side of the engagement shaft and fitted into the engagement hole with an interference fit;
A small-diameter portion formed on the rear end side of the engagement shaft and fitted into the engagement hole with a clearance fit;
The engaging shaft comprises a stepped portion formed at the connecting portion between the large diameter portion and the small diameter portion,
The rainwater storage and infiltration facility is characterized in that the stepped portion engages with an end surface of the engagement hole on the side opposite to the opening to prevent the engagement shaft from coming out of the engagement hole. In the rainwater storage and penetration facility according to claim 4,
On the circumference of the outer peripheral surface of the large-diameter portion, or on the circumference of the inner peripheral surface of the engagement hole, a plurality of small protrusions that are in line contact and are fit-fit are formed. A rainwater storage and penetration facility characterized by this.

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