Patent Application
20220161902
The present invention relates to a floating oceanic debris collection device capable of automatically collecting debris floating on a sea surface, and a complex floating oceanic debris collection device including a plurality of the devices.
In recent years, an increase in debris flowing into the sea has become an international problem, and in particular, plastic debris is not spontaneously decomposed and continues to drift in the sea unless the plastic debris is collected. As a result, it is known that there are risks that the plastic itself and harmful substances attached to the plastic are taken into animals such as plankton and fish as small crushed microplastics and normal life activities are inhibited.
Thus, a mechanism for collecting the plastic debris and other debris flowed into the sea has been demanded as an urgent problem.
As the mechanism for collecting the debris on the sea, for example, self-propelled debris collection devices using a single-body and double-body hull disclosed in JP 1993-35594 U (Patent Literature 1) and JP 1998-95393 A (Patent Literature 2) can be used.
Since these self-propelled debris collection devices of the related art can autonomously collect debris floating on the sea by causing the hull to self-propel, it is efficient to collect debris at some specified locations such as ponds and lakes.
However, in a situation where debris needs to be collected over a wide range such as the sea, it is very inefficient to use a self-propelled debris collection device, and the amount of debris that can be collected is also very limited.
For example, an automatic debris collection device disclosed in JP 2018-17064 A (Patent Literature 3) is also known. The present invention has been made to solve disadvantages of the above self-propelled debris collection device of the related art, and is a device that includes a container including a net, a float for floating the container, and a pumping mechanism for pumping out water in the container.
However, the automatic debris collection device of the related art collects the debris by using the fact that the water flows into the container due to a height difference from a water surface around the container by pumping out the water in the container and the debris on the sea flows into the container. Thus, it is difficult to say that the automatic debris collection device of the related art stably operates even on a water surface with severe movement such as a tide or a wave on the sea although the automatic debris collection device of the related art seems to stably operate on a gentle water surface such as a pond, a lake, or a water storage facility. When the scale of the device is to be increased to be suitable for use on the sea, since a pumping mechanism having performance corresponding the scale of the device is required, it is not realistic.
An object of the present invention is to provide a floating oceanic debris collection device that can automatically collect debris, is suitable for use on a sea, and can be used without maintenance for a long period.
A floating oceanic debris collection device which is the present invention made in order to solve the above problems is a floating oceanic debris collection device that has a circular shape in plan view, is installed on a sea, and collects debris floating on a sea surface. A base having a circular shape is divided into an inner peripheral side and an outer peripheral side, a debris collection unit is provided on the outer peripheral side of the base, and a debris storage unit is provided on the inner peripheral side of the base, the debris collection unit includes a blade that is erected on an upper surface of the base and rotates the base by receiving wind on the sea, and an arm of which a proximal end is fixed to the base and a distal end extends to a rotation direction side which is an outward direction, the debris storage unit includes an inner peripheral float installed in an annular shape on a lower surface of the base, an inlet formed to penetrate on a peripheral surface of the inner peripheral float, and an outlet formed to penetrate on an upper surface of the base, and the entire base is able to rotate by receiving the wind on the sea by the blade of the debris collection unit, scrap the debris floating on the sea surface inward by the arm, introduce the debris to an inside from the inlet formed in the debris storage unit, and take in the debris from the outlet formed in a top surface of the debris storage unit.
When a guide plate protruding from the peripheral surface of the debris storage unit and extending in the same direction as a rotation direction of the debris collection unit is formed at a rear end edge in the inlet, it is possible to more reliably collect the debris floating on the sea surface.
When two attachment holes are formed in the arm, one round hole and one long hole are formed in the base, the arm is pivotally supported by the base by inserting two shafts into the attachment holes of the arm and the round hole and the long hole of the base, the arm is swingably supported in a predetermined range with the shaft inserted in the round hole by enabling the movement of the shaft in the long hole as a support point, and a position of the arm in an up-down direction is able to be adjusted by providing fasteners capable of adjusting a position in an up-down direction in at least one end of the shaft, it is possible to collect the debris floating on the sea surface in a wider range by the moving arm.
When the blade is made of a flexible sheet having a convex quadrangular shape in plan view and having a shape of which lengths of two sides continuous to a predetermined on side are different, and is formed in a semi-dorm shape of which a long side is higher than a short side by being fixed to the base in a state of being bent such that both ends of the long side of the two sides approach, since a three-dimensional blade can be made of one sheet without molding in advance, it is reasonable and economical.
When the base is a donut type having a cavity in a center, a central float is provided in the cavity, and a position of the entire device is able to be fixed by attaching an anchor to the central float, it is possible to position the floating oceanic debris collection device with a simple configuration.
When a complex floating oceanic debris collection device is installed on a sea includes a plurality of housing units having a shape hollowed out in a circular shape in plan view and the above floating oceanic debris collection device is housed in each housing unit, it is possible to easily realize a larger floating oceanic debris collection device.
According to the present invention, it is possible to provide a floating oceanic debris collection device that can automatically collect the debris over the wide range regardless of a type of the debris floating on the sea and does not require maintenance since the floating oceanic debris collection device is driven only by wind on the sea without using an electric power or other artificial power.
It is possible to collect the debris on the sea on a larger scale by providing the complex floating oceanic debris collection device in which the plurality of the floating oceanic debris collection devices is housed, and it is also possible to effectively use the space provided in the inside for various purposes such as residential facilities, environmental improvement facilities, observation facilities, power generation facilities, and the like of the population floating island.
Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings.
The debris collection unit 2 includes 16 arms 20 attached to a lower surface 11 of the base 1 at equal intervals and having distal ends extending to a rotation direction side which is an outward direction, and 16 blades 30 erected at equal intervals on an upper surface 12 of the base 1.
The arm 20 includes an arm member 21 including two attachment holes 22a and 22b, an arm attachment member 23 in which one round hole 24a and one long hole 24b are formed, two shafts 25 inserted into the attachment holes 22a and 22b of the arm member 21 and the round hole 24a and the long hole 24b of the arm attachment member 23 and attached so as not to fall off by position-adjustable fasteners 26a and 26b provided at both ends, and an outer peripheral float 27 provided integrally with the arm attachment member 23 and giving buoyancy to the base 1.
In the arm 20, the shaft 25 inserted into the long hole 24b moves in the long hole 24b, and thus, the arm member 21 can swing with the shaft 25 inserted into the round hole 24b as a support point. An effective length of the shaft 25 is changed by vertically adjusting a position of the fastener 26 of the shaft 25, and thus, a position of the arm member 21 in an up-down direction can be adjusted.
In the present embodiment, the attachment hole 22a is formed at a proximal end position 211 of the arm member 21, and the attachment hole 22b is formed at an intermediate position 212 slightly closer to a distal end 213 than the proximal end position 211. The arm member 21 and the arm attachment member 23 are integrated by inserting and fixing the shafts 25 by the fasteners 26 in a state in which the attachment hole 22a of the arm member 21 and the round hole 24a of the arm attachment member 23 are communicatively connected with each other and the attachment hole 22b of the arm member 21 and the long hole 24b of the arm attachment member 23 are communicatively connected with each other (see
At this time, in the arm member 21, the shaft 25 inserted at the intermediate position 212 moves in the long hole 24b with the shaft 25 inserted at the proximal end position 211 as the support point, and thus, the distal end 213 can swing in an opening direction 0 and a closing direction C. Accordingly, debris G floating in a wider range can be guided to and collected in the inside of the debris collection unit 1 (see
It is more preferable that the distal end 213 of the arm member 21 has flexibility.
The outer peripheral float 27 serves to adjust such that a rotation speed of the entire base 1 becomes an appropriate rotation speed by giving buoyancy to the base 1 and receiving resistance of water when the base 1 rotates.
The blade 30 is made of a flexible sheet 31 having a convex quadrangular shape in plan view and having a shape in which lengths of a long side 33 and a short side 34 continuous to a predetermined side 32 are different.
Folded portions 36 and 37 having predetermined widths are formed on one side 32 of the sheet 31 and a facing side 35, respectively.
The blade 30 is formed in a half-dome shape of which the long side 33 has a height higher than that of the short side 34 by folding the folded portions 36 and 37 outward in a state in which both ends 33a and 33b of the long side 33 are bent so as to approach each other and fixing the folded portions 36 and 37 to the base 1 in a state of being substantially parallel to each other (see
As described above, the rotation direction of the entire base 1 can be limited to a desired direction by forming the blades 30 in the semi-dome shapes and installing all the blades 30 in a constant orientation.
In the present embodiment, the folded portions 36 and 37 are folded outward, but it is a matter of course that the folded portions may be folded inward.
A reference sign 40 is a vertical blade, is attached to a framework including 16 pillars 41 vertically erected from the base 1 and a circular reinforcing frame 42 connecting the pillars 41, and is integrally fixed to the pillars 41.
The debris storage unit 3 includes an annular inner peripheral float 50 fixed to the lower surface 11 of the base 1, inlets 52 formed to penetrate through a plurality of positions on a peripheral surface 51 of the inner peripheral float 50, outlets 60 formed to penetrate through the upper surface 12 of the base 1, and a substantially columnar central float 70 disposed in a central cavity of the base 1.
The inner peripheral float 50 has an annular shape as a whole, and four inlets 52 formed to penetrate toward the center are provided on the peripheral surface 51 thereof.
A space between each of the inlets 52 formed to penetrate and the inside of the inner peripheral float 50 is a passage 53 that is communicatively with a space 54 inside the inner peripheral float 50 and between the base 1 and the sea surface S.
A guide plate 55 protruding from the peripheral surface 51 of the inner peripheral float 50 and extending in the same direction as a rotation direction R of the debris collection unit 1 is attached to a rear end edge 521 of each inlet 52 with respect to the rotation direction R.
At this time, since a net 57 covering the entire lower surface 56 is attached to the inner peripheral float 50, even though the debris G collected in the space 54 sinks, there is no concern that the debris G flows out to the sea again.
An openable and closable lid is attached to each of the plurality of outlets 60 formed on the upper surface 12 of the base 1. The lid is closed in normal times, and the lid is opened when the collected debris G is collected in the space 54.
The central float 70 is disposed in a cavity formed at the center of the base 1, and can fix a position of the entire floating oceanic debris collection device 100 on the sea by attaching an anchor 71 to the central float 70.
In the floating oceanic debris collection device 100 of the present invention having the above configuration, the entire base 1 can rotate in the R direction indicated in
At this time, since the guide plate 55 is attached to each inlet 52, the debris G scraped into the debris collection unit 2 can be smoothly introduced into the inlets 52 along the guide plate 55.
In the present embodiment, since the debris collection unit 2 and the debris storage unit 3 use the common base 1, the debris collection unit 2 and the debris storage unit 3 rotate in synchronization with each other. However, for example, the debris collection unit and the debris storage unit may be independent separate bodies, and may rotate independently (not illustrated).
According to the complex floating oceanic debris collection device 200 of the present embodiment, it is possible to collect the debris on the sea over a wider range than the single floating oceanic debris collection device 100, and it is possible to effectively use the space provided in an inside 240 for various purposes such as residential facilities, environmental improvement facilities, observation facilities, power generation facilities, and the like of a population floating island.
Although the float body 210 floats on the sea by the buoyancy of a plurality of integrally fixed pillar floats 250, for example, the float body 210 itself may be made of a material exhibiting buoyancy, and the float body can be floated on the sea by any other method (See
A plurality of rollers 4 is attached to the outer periphery of the base 1 of the floating oceanic debris collection device 100, and the rollers 4 come into contact with an inner periphery of the housing unit 220 of the float body 210. Accordingly, since the base 1 of the floating oceanic debris collection device 100 does not directly hit the housing unit, the base 1 of the floating oceanic debris collection device 100 can be smoothly rotated, and the occurrence of a failure due to collision can be prevented (see
According to the present invention, it is possible to provide a floating oceanic debris collection device that can automatically collect the debris over the wide range regardless of a type of the debris floating on the sea and does not require maintenance since the floating oceanic debris collection device is driven only by wind on the sea without using an electric power or other artificial power.
It is possible to collect the debris on the sea on a larger scale by providing the complex floating oceanic debris collection device in which the plurality of the floating oceanic debris collection devices is housed, and it is also possible to effectively use the space provided in the inside for various purposes such as residential facilities, environmental improvement facilities, observation facilities, power generation facilities, and the like of the population floating island.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2018-240218 | Dec 2018 | JP | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2019/048317 | 12/10/2019 | WO | 00 |
