JP7734573B2 - Manufacturing method for rainwater storage and infiltration facility assembly - Google Patents

Description

The present invention relates to a method for manufacturing assemblies used in rainwater storage facilities that store rainwater, etc., and rainwater infiltration facilities that temporarily store rainwater, etc., and then allow the stored rainwater, etc. to slowly infiltrate into the ground and then be discharged.

Rainwater storage facilities are buried underground to store collected rainwater, etc. On the other hand, rainwater infiltration facilities are buried underground to temporarily store collected rainwater, etc., and then allow it to slowly infiltrate into the ground to adjust for sudden inflows into rivers, etc., or to ensure the amount of water infiltrating into groundwater veins and prevent land subsidence.

There are various types of rainwater storage facilities and rainwater infiltration facilities (hereinafter referred to as "rainwater storage and infiltration facilities"). The applicant has proposed a block-shaped laminated body that can efficiently and widely utilize limited storage space, has excellent mechanical strength, and can be freely adjusted in width, depth, and length to easily adapt to differences in floor area and volume, as well as a rainwater storage and infiltration facility using this body (see Patent Documents 1 and 2).

Japanese Patent Application Laid-Open No. 2003-313926 Japanese Patent Application Laid-Open No. 2004-238839

The block-shaped laminate (hereinafter referred to as the "assembly") described in Patent Documents 1 and 2 above is manufactured by stacking plate-shaped members with alternating strip-shaped recesses and protrusions on their front and back surfaces in sequence so that the recesses and protrusions intersect on the opposing surfaces of adjacent plate-shaped members, and then bonding the contact portions of the intersecting protrusions together.

Rainwater storage and infiltration facilities require the provision of water holes for the inflow and outflow of rainwater, as well as the drilling of communication holes to connect inlet and outlet pipes for rainwater. However, when manufacturing rainwater storage and infiltration facilities using the above-mentioned assembly, drilling the water holes and communication holes is not easy, which is one of the factors that increases the manufacturing costs of rainwater storage and infiltration facilities.

The present invention was developed in consideration of the above-mentioned problems, and aims to improve the efficiency of the manufacturing process and reduce the manufacturing costs of rainwater storage and infiltration facilities.

In order to achieve the above-mentioned object, the present invention is a method for manufacturing an assembly for rainwater storage and infiltration equipment, which is characterized by stacking resin plate-like members in the same direction, with alternating strip-shaped concave and convex portions on the front and back surfaces, and with the concave and convex portions including wave-shaped portions that are oblique in at least two different directions relative to the outer shape, simultaneously drilling a plurality of water passage holes that penetrate the stacking direction of the stacked plate-like members using a plurality of rotary drills that move up and down to penetrate each of the plurality of water passage holes, stacking adjacent plate-like members of the plurality of plate-like members in sequence so that the concave and convex portions of each plate-like member intersect on opposing surfaces, and simultaneously welding them using a plurality of welding tips that move up and down at the contact points of the intersecting convex portions and abut the contact points .

According to this invention, resin plate-shaped members are stacked in the same direction and multiple water-passing holes are drilled while the plate-shaped members are in close contact with each other. Next, adjacent plate-shaped members are stacked and welded in order so that the recessed and protruding portions of each plate-shaped member intersect on opposing surfaces. This makes it difficult for the multiple plate-shaped members to move relative to each other when drilling the water-passing holes, allowing the water-passing holes to be drilled accurately in a short amount of time.

Furthermore , the drilling of the plurality of water holes can be carried out simultaneously using a plurality of rotary drills that move up and down to penetrate each of the plurality of water holes, thereby shortening the work time.

In addition, welding at the contact points of the multiple intersecting protrusions of the adjacent plate-shaped members can be performed simultaneously using multiple welding tips that move vertically and abut against the contact points, thereby shortening the work time.

In the above manufacturing method, by drilling the communication holes in the surface perpendicular to the stacking direction of the assembly made up of the plurality of welded plate-like members, the communication holes can be formed in a single drilling operation.

By drilling the communication holes with a cylindrical rotary cutter that has multiple blades at one end of the cylindrical portion and plate-shaped blades arranged diametrically inside the cylindrical portion, it is possible to cut only the necessary areas, improving work efficiency.

As described above, the present invention makes the manufacturing process more efficient and reduces the manufacturing costs of rainwater storage and infiltration facilities.

1A and 1B are three-sided views showing a resin plate-shaped member used in a manufacturing method for an assembly for rainwater storage and infiltration equipment according to the present invention, where (a) is a front view, (b) is a plan view, and (c) is a side view. FIG. 2 is a perspective view of the resin plate member shown in FIG. 1 . 1 is a schematic diagram for explaining the step of drilling a water hole in the manufacturing method of an assembly for rainwater storage and infiltration facilities according to the present invention. FIG. 1 is a schematic diagram for explaining the step of drilling a water hole in the manufacturing method of an assembly for rainwater storage and infiltration facilities according to the present invention. FIG. 1 is a schematic diagram for explaining a welding process in a manufacturing method of an assembly for rainwater storage and infiltration facilities according to the present invention. FIG. 1 is a schematic diagram for explaining a welding process in a manufacturing method of an assembly for rainwater storage and infiltration facilities according to the present invention. FIG. 10 is a schematic diagram for explaining the step of drilling a communication hole in the manufacturing method of the assembly for rainwater storage and infiltration facilities according to the present invention. FIG. 1 is a schematic diagram showing an assembly for rainwater storage and infiltration facilities manufactured by a manufacturing method according to the present invention.

Next, the embodiments of the present invention will be described in detail with reference to the drawings.

Figures 1 and 2 show a resin plate-like member (hereinafter referred to as "plate-like member") used in a manufacturing method for a rainwater storage and infiltration facility assembly (hereinafter referred to as "assembly") according to the present invention. This plate-like member 1 is a corrugated plate-like member made of thermoplastic resin, with multiple corrugated portions 1a, 1b extending diagonally in a plan view (corrugated portion 1a extends upward and left, and corrugated portion 1b extends downward and left) on either side of a rectangular apex 1c to form a trapezoidal space when viewed from the front. In other words, this plate-like member 1 has alternating strip-like recesses 1d and protrusions 1e on its front and back surfaces, and these recesses 1d and protrusions 1e are oblique in two different directions relative to the outer shape.

Next, the water passage hole drilling process will be explained with reference to Figures 3 and 4.

As shown in Figure 3, multiple plate-like members 1 (four in the illustrated example, 1A-1D) are stacked in the same direction, i.e., while maintaining the front and back surfaces of the plate-like members 1. When the plate-like members 1 are stacked in the same direction, the strip-like protrusions 1e of the lower plate-like member 1D of two adjacent plate-like members 1 (e.g., 1C and 1D) enter the strip-like recesses 1d of the upper plate-like member 1C, and the multiple plate-like members 1 (1C, 1D) are stacked in close contact with each other.

Next, as shown in Figure 4, while the stacked plate-like members 1 (1A-1D) are held on a table or the like, multiple water passage holes 2 are drilled from above in one go using a drilling device such as multiple electric rotary drills 3. In this figure, 18 water passage holes 2 are drilled. Because the multiple plate-like members 1 (1A-1D) are stacked in close contact with each other, the multiple plate-like members 1 are less likely to move relative to each other when drilling the water passage holes 2, the drill travel distance is short, and the water passage holes 2 can be drilled with high positional precision. Furthermore, because multiple rotary drills 3 or the like are used to drill multiple water passage holes 2 in one go, the work time is also short.

Next, the welding process will be explained with reference to Figures 5 and 6.

As shown in both figures, after drilling the water passage holes, the pair of plate-shaped members 1A, 1B are placed in opposite directions, i.e., the upper plate-shaped member 1A is held upside down with its front and back surfaces intact, while the lower plate-shaped member 1B is held upside down, and then they are abutted and fixed on a table or similar. This creates numerous honeycomb-shaped spaces, and the protruding portions 1e (see Figure 1) of each of the pair of plate-shaped members 1A, 1B come into contact at multiple locations. In this state, as shown in Figure 5(a), the welding portion (welding tip 4) of the welding device is abutted against the protruding contact portions 1f from above, welding the multiple protruding contact portions 1f all at once. In this figure, 276 protruding contact portions 1f are welded at once. This allows the pair of plate-shaped members 1 to be joined in a short amount of time.

Next, another plate-like member 1 is placed on top of the joined plate-like members 1A and 1B, facing in the opposite direction, and the protruding contact portions 1f are welded in the same manner as above. This process is repeated until, for example, 24 plate-like members 1 are joined together to produce assembly 5 (see Figure 7).

Next, the process of drilling the communication holes will be explained with reference to Figure 7.

The assembly 5 consisting of the multiple welded plate-like members 1 is fixed on a table or the like, and a cylindrical cutter 7 having multiple blades (circular double blades 7b, 7c) at one end of the cylindrical portion 7a and a plate-like blade 7d arranged diametrically inside the cylindrical portion 7a is rotated and inserted into the side of the assembly, as shown in Figure 7(c), to drill the communication holes 6 (see Figure 8). Using the cylindrical cutter 7 allows cutting only where necessary. Furthermore, by using a cutter 7 with dimensions corresponding to the diameter of the communication hole to be drilled, multiple types of communication holes 6 can be accommodated.

In the above embodiment, a plate-shaped member 1 was used in which strip-shaped recesses 1d and protrusions 1e were alternately repeated on the front and back surfaces, and these recesses 1d and protrusions 1e were oblique in two different directions relative to the outer shape. However, a plate-shaped member in which the recesses 1d and protrusions 1e are oblique in three or more different directions relative to the outer shape may also be used.

Furthermore, the above embodiments are merely examples and are not intended to limit the technical scope of the present invention.

1 (1A to 1D) Plate-like member 1a, 1b Corrugated plate portion 1c Top portion 1d Recessed portion 1e Convex portion 1f Convex portion contact portion 2 Water passage hole 3 Electric rotary drill 4 Welding tip 5 Assembly body 6 Communication hole 7 Cutter

Claims (3)

Resin plate-like members having alternately repeated strip-like recesses and protrusions on the front and back surfaces, the recesses and protrusions including wavy portions oblique in at least two different directions relative to the outer shape, are stacked in the same direction, and a plurality of water-passing holes penetrating the stacked plate-like members in the stacking direction are simultaneously drilled using a plurality of rotary drills that move up and down to penetrate each of the plurality of water-passing holes ,
A method for manufacturing an assembly for rainwater storage and infiltration equipment, characterized in that adjacent plate-like members of the plurality of plate-like members are stacked in sequence so that the concave and convex portions of each plate-like member intersect on opposing surfaces, and then simultaneously welded at the contact points of the intersecting convex portions using a plurality of welding tips that move vertically and abut the contact points. A method for manufacturing an assembly for rainwater storage and infiltration equipment as described in claim 1, characterized in that communicating holes are drilled on a surface perpendicular to the stacking direction of the assembly consisting of a plurality of welded plate-like members. A method for manufacturing an assembly for rainwater storage and infiltration equipment as described in claim 2, characterized in that the communicating holes are drilled using a cylindrical rotary cutter having multiple blades at one end of the cylindrical portion and plate-shaped blades arranged diametrically inside the cylindrical portion.