Floating body type raft gate, and drifting object intrusion prevention method

Abstract

To easily form a gate in a flow path into which drifting objects intrude.SOLUTION: A floating body type raft gate (1) for forming a gate (3) preventing drifting objects from intruding between breakwaters (2, 2) of a port is provided with: a float (5) attached to a bottom of a raft main body (4) to enable it to float on the water (6); first capturing means (15) for capturing drifting objects near the water surface (6a); and second capturing means (16) for capturing drifting objects in the water (6b). Also, the first and second capturing means (15, 16) are provided on a port side and a starboard side so as to face each other. Furthermore, in a drifting object intrusion prevention method, the floating body type raft gate (1) is connected to a flow path through which drifting objects intrude, to form a gate (3) for preventing drifting objects from intruding through the flow path through which drifting objects intrude.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a floating raft gate for forming a gate that prevents drifting objects from entering, and a method for preventing drifting objects from entering using the floating raft gate. [Background technology]

[0002] Typhoons, floods, and other events can cause driftwood, debris, and other debris to invade ports, fishing ports, dams, lakes, rivers, and other ports, damaging ships and facilities and preventing them from setting sail or fishing for long periods of time until the driftwood is removed.

[0003] Therefore, as a gate for preventing the intrusion of drifting objects, a pneumatic lift gate is known that is permanently installed in the flow path through which drifting objects enter (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-35984 Summary of the Invention [Problem to be solved by the invention]

[0005] The conventional pneumatic lift gates described above are permanently installed in the flow path where driftwood can enter, through extensive construction work.

[0006] Therefore, with the above-mentioned conventional pneumatic elevation gates, the construction work required for installing the gate required a great deal of effort, cost, and time, and it was difficult to easily and quickly install or change the installation location in an emergency such as a disaster. [Means for solving the problem]

[0007] Therefore, the present invention as defined in claim 1 is a floating raft gate for forming a gate that prevents the intrusion of drifting objects, and is provided with a float attached to the bottom of the raft body to enable it to float on the water, as well as a first capture means for capturing drifting objects drifting near the water surface and a second capture means for capturing drifting objects drifting underwater.

[0008] In a second aspect of the present invention, in the first aspect of the present invention, the first capturing means is formed to protrude beyond the raft body.

[0009] In addition, in the present invention according to claim 3, in the present invention according to claim 1 or 2, the first and second capturing means are provided on the port and starboard sides, facing each other.

[0010] In addition, in the present invention of claim 4, in a method for preventing drifting objects from entering using a floating raft gate, a float is attached to the bottom of the raft body to enable it to float on the water, and the floating raft gate is equipped with a first capture means for capturing drifting objects drifting near the water surface and a second capture means for capturing drifting objects drifting underwater, and is connected to the flow path through which drifting objects enter, thereby forming a gate for preventing drifting objects from entering through the flow path through which drifting objects enter. [Effects of the Invention]

[0011] The present invention provides the following effects.

[0012] In other words, in this invention, a float is attached to the bottom of the raft body to allow it to float on the water, and a floating raft gate is provided with a first capture means for capturing drifting objects near the water surface and a second capture means for capturing drifting objects floating underwater.The floating raft gate is connected to the flow path through which drifting objects enter, forming a gate to prevent drifting objects from entering through the flow path through which drifting objects enter.Therefore, the gate can be easily installed in the flow path through which drifting objects enter, and the installation position can be easily changed depending on the direction in which the drifting objects enter.

[0013] In particular, if the first capturing means is formed to extend beyond the raft body, it can capture drifting objects near the water surface outside the raft body, preventing the drifting objects from colliding with the raft body and preventing damage to the raft body.

[0014] Furthermore, if the first and second capture means are installed facing each other on the port and starboard sides, driftwood can be captured doubly regardless of the orientation of the floating raft gate, further preventing the intrusion of driftwood. [Brief explanation of the drawings]

[0015] [Figure 1] 1A is a plan view showing a gate using a floating raft gate according to the present invention, and FIG. 1B is a left side view showing the gate. [Figure 2] Plan view showing the floating raft gate. [Figure 3] Right side view of the same. [Figure 4] The same front view. [Figure 5] FIG. [Figure 6] FIG. [Figure 7] Plan view of a floating raft gate (retracted state (a) and extended state (b)). [Figure 8] Plan view showing the floating raft gate. [Figure 9] Right side view of the same. [Figure 10] FIG. [Figure 11] The same front view. DETAILED DESCRIPTION OF THE INVENTION

[0016] The following describes the specific configuration of the floating raft gate according to the present invention and the method for preventing drifting objects from entering a port using the floating raft gate, with reference to the drawings. The following description will be given of the floating raft gate according to the present invention as a gate for preventing drifting objects from entering a port through a navigation channel between breakwaters. However, the floating raft gate according to the present invention can be applied not only to the sea but also to dams, lakes, rivers, etc., as long as it can prevent drifting objects from entering the channel through which drifting objects enter.

[0017] As shown in Figure 1, the floating raft gate 1 is connected to one or more hold(s) at the front and rear between the breakwaters 2, 2 of the port to form a gate 3 for preventing drifting debris from entering the port through the navigation channel between the breakwaters 2, 2, which is a passageway for drifting debris. In the following explanation, the longitudinal direction of the floating raft gate 1, which is the direction of travel when the floating raft gate 1 is towed by a transport ship, fishing boat, etc., is referred to as the fore-and-aft direction, and the shorter side of the floating raft gate 1 is referred to as the left-and-right direction.

[0018] As shown in Figures 2 to 6, this floating raft gate 1 has multiple hollow floats 5 attached at intervals to the bottom of a steel pipe raft body 4 that has a rectangular frame shape when viewed from above, and is capable of floating on water (sea) 6.

[0019] The raft body 4 has a rectangular outer lower frame 8 provided outside a rectangular inner lower frame 7, and an upper frame 9 provided above the inner lower frame 7.

[0020] The raft body 4 has lower connectors 10 extending linearly from the inside to the outside, spaced apart between an inner lower frame 7 and an outer lower frame 8. Floats 5 are attached to the lower parts of the inner lower frame 7, the outer lower frame 8 and the lower connectors 10.

[0021] In addition, the raft body 4 has inner connectors 11 arranged at intervals between the inner lower frame 7 and the upper frame 9, which are inclined alternately back and forth or left and right to form a truss.

[0022] Furthermore, the raft body 4 has outer connectors 12 inclined from the outer lower side toward the inner upper side, provided at intervals between the outer lower frame 8 and the upper frame 9.

[0023] The raft main body 4 forms a raft port side section 13 with the left side portions of the inner lower frame 7, outer lower frame 8, and upper frame 9, and the lower connector 10, inner connector 11, and outer connector 12 provided between them, and a raft starboard side section 14 with the right side portions of the inner lower frame 7, outer lower frame 8, and upper frame 9, and the lower connector 10, inner connector 11, and outer connector 12 provided between them.

[0024] The floating raft gate 1 is provided with a first capturing means 15 for mainly capturing drifting objects near the water surface (ocean surface) 6a and a second capturing means 16 for mainly capturing drifting objects in the water (underwater) 6b, respectively, on the raft port side 13 and the raft starboard side 14 of the raft main body 4. The first capturing means 15 and the second capturing means 16 may be provided facing each other on both the left and right sides of the floating raft gate 1, or may be provided on only one of the port or starboard sides.

[0025] The first capturing means 15 comprises a mesh net 17 detachably stretched vertically inside the inner lower frame 7 and the inner upper frame 9 that make up the raft port side section 13 and the raft starboard side section 14 of the raft main body 4, with the truss-shaped inner connector 11 positioned immediately adjacent to (directly outside) the net 17, and the float 5 and the outer connector 12 positioned outside the net 17. This ensures that relatively large driftwood and other drifting objects collide first with the float 5, inner connector 11, or outer connector 12, preventing the drifting objects from directly colliding with the net 17 and preventing damage to the net 17.

[0026] In the floating raft gate 1, not only the net 17 but also the raft port side 13 and the raft starboard side 14 of the raft main body 4, and the floats 5 attached to the raft port side 13 and the raft starboard side 14 of the raft main body 4, constitute a first capture means 15 that mainly captures drifting objects near the water surface 6a.

[0027] That is, among the drifting objects floating near the water surface 6a, mainly relatively large driftwood and the like are captured by the raft port side 13, the raft starboard side 14 and the float 5, while mainly relatively small driftwood and the like are captured by the net 17.

[0028] The second capturing means 16 comprises an upper end of a membrane-like curtain 18 detachably attached to the inside of the inner lower frame 7 constituting the raft port side section 13 and the raft starboard side section 14 of the raft main body 4, and a weight 19 detachably attached to the lower end of the curtain 18, so that the curtain 18 hangs vertically downward into the water 6b, with the inner lower frame 7 positioned immediately adjacent to (directly outside) the curtain 18, and the float 5, outer lower frame 8, and lower connector 10 positioned outside the curtain 18. This ensures that relatively large driftwood and other drifting objects collide first with the float 5, outer lower frame 8, and lower connector 10, preventing the drifting objects from directly colliding with the curtain 18 and preventing damage to the curtain 18.

[0029] In the floating raft gate 1, not only the curtain 18 but also the raft port side 13 and the raft starboard side 14 of the raft main body 4, and the floats 5 attached to the raft port side 13 and the raft starboard side 14 of the raft main body 4, constitute a second capture means 16 that mainly captures drifting objects in the water 6b.

[0030] That is, among the drifting objects in the water 6b, mainly relatively light dust and the like are captured by the raft port side 13, the raft starboard side 14 and the float 5, while mainly relatively heavy mud and the like are captured by the curtain 18.

[0031] The floating raft gate 1 is configured as described above, and when there is a risk of drifting objects entering the harbor from between the harbor's breakwaters 2, 2, one or more hold are connected in front and behind between the harbor's breakwaters 2, 2 to form a gate 3, which captures drifting objects mainly drifting near the water surface 6a with the first capturing means 15 and captures drifting objects mainly drifting underwater 6b with the second capturing means 16, thereby preventing drifting objects from entering the harbor from the waterway between the harbor's breakwaters 2, 2.

[0032] The floating raft gate 1 can be moored in a body of water such as a harbor or fishing port, or stored on land. Its simplified structure allows for easy maintenance, and its light weight allows it to be easily and quickly installed by towing it with a fishing boat or transporting it in with a crane.

[0033] In addition, the floating raft gate 1 may be configured to be self-propelled by attaching an outboard motor to the raft body 4, or may be configured to be able to navigate using natural energy by installing a natural energy source such as a solar power generation system or a wind power generation system, or may be configured to be able to be installed unmanned by remote control using location information by installing a GPS device.

[0034] Furthermore, the floating raft gate 1 is not limited to having the raft body 4 made of steel pipes, but may also be made from recycled wood, bamboo, or waste materials, or a combination of these.It may also be divided into multiple parts so that they can be assembled, and may even be equipped with wheels so that it can be towed.

[0035] Furthermore, in order to protect the float 5, the floating raft gate 1 preferably has a protective member 20 detachably attached around the float 5 at the bottom of the raft body 4. The protective member 20 can be formed from a steel net or a steel pipe frame.

[0036] Furthermore, as shown in Figure 1, the gate 3 is not limited to being formed by connecting multiple identical floating raft gates 1. As shown in Figure 7, multiple floating raft gates 21 to 24, each having a U-shaped shape in a plan view with an open rear end, and each successively smaller, can be connected in a nested, expandable manner to form a gate 25, which can be kept in a shortened state (see Figure 7(a)) during storage or transportation, and extended (see Figure 7(b)) when installed.

[0037] As described above, in the floating raft gate 1 and the method for preventing drifting objects from entering using the floating raft gate 1, a float 5 is attached to the bottom of the raft body 4 so that it can float on the water 6, and the floating raft gate 1 is equipped with a first capture means 15 for capturing drifting objects drifting near the water surface 6a and a second capture means 16 for capturing drifting objects drifting underwater 6b, and is connected between the breakwaters 2, 2 of the port to form a gate 3 for preventing drifting objects from entering between the breakwaters 2, 2 of the port.

[0038] Therefore, the floating raft gate 1 of the above configuration and the method for preventing drifting objects from entering using the floating raft gate 1 can be easily installed between the breakwaters 2, 2 of a port, and the installation position can be easily changed depending on the direction of entry of the drifting objects.

[0039] The floating raft gate 1 is configured such that first and second capturing means 15, 16 are provided on the port and starboard sides, facing each other.

[0040] Therefore, the floating raft gate 1 configured as described above can capture drifting objects doubly regardless of the orientation of the floating raft gate 1, thereby further preventing drifting objects from entering the harbor.

[0041] The present invention is not limited to the shape of the floating raft gate 1 described above, but may be configured so long as the raft main body 4, which can float on the water using floats 5, is provided with a first capturing means 15 for capturing drifting objects near the water surface 6a and a second capturing means 16 for capturing drifting objects in the water 6b. For example, in the floating raft gate 1, the raft main body 4 (the raft port side section 13 and the raft starboard side section 14) are used as components of the first capturing means 15, which mainly captures drifting objects near the water surface 6a, but the first capturing means 15 may be formed to protrude outward from the raft main body 4.

[0042] 8 to 11, the floating raft gate 26 has a rectangular box-shaped raft main body 27, floats 28 attached to the lower starboard and port sides of the raft main body 27, two projections 30, 30 projecting in an arc shape toward the right between the starboard front end and the starboard rear end attached to the starboard side (starboard raft section 29) of the raft main body 27, spaced apart vertically, and eight catchers 31 extending vertically attached to the front and rear of the projections 30, 30. Support bodies 32 are provided between the raft main body 27 and the projections 30, 30, and cushioning material for mitigating collisions with drifting objects may be placed in the space between the raft main body 27 and the projections 30, 30.

[0043] The projections 30, 30 are curved to the right between the starboard front end and starboard rear end of the raft main body 27 to disperse the impact of a collision with drifting objects and to gather the drifting objects at the front end or rear end after the collision.

[0044] The upper end of the capture body 31 extends above the raft main body 27 and is bent in the projection direction (to the right of the raft main body 27) to make it difficult for drifting objects near the water surface 6a to get over, making it easier to capture the drifting objects, thereby functioning as the first capture means 33. The lower end of this capture body 31 extends below the water surface 6a, making it able to capture drifting objects in the water 6b, so that it also functions as the second capture means 34.

[0045] In addition, in the floating raft gate 26, six arches 35 that extend upward in an arc shape are attached to the upper starboard side of the raft body 27 at intervals in the front and back, and the arches 35 are connected by three connectors 36.

[0046] In this floating raft gate 26, not only the capture body 31 but also the projections 30, 30, arches 35 and connecting bodies 36, and the float 28 attached to the starboard raft section 29 of the raft main body 27 and its lower part constitute a first capture means 33 for capturing drifting objects near the water surface 6a.

[0047] As described above, the floating raft gate 26 has a configuration in which the first capturing means 33 is formed to protrude beyond the raft main body 27.

[0048] Therefore, the floating raft gate 26 configured as described above can capture drifting objects floating near the water surface 6a outside the raft main body 27, thereby preventing the drifting objects from colliding with the raft main body 27 and preventing damage to the raft main body 27.

[0049] In the above-mentioned floating raft gate 26, the projection 30, capture body 31, arch 35, etc. are provided only on the starboard side of the raft main body 27 (raft starboard section 29), but they may also be similarly provided on the port side of the raft main body 27 (raft port section 37).

[0050] Furthermore, in the floating raft gate 26, a thin, porous flat plate 38 is attached to the top of the raft main body 27, which can be used as a foothold for workers during maintenance of the floating raft gate 26, and can also be effectively used as a floating pier when the floating raft gate 26 is not in use (standby). When the floating raft gate 26 is not in use, a water tank can be provided in the raft main body 27 so that it can be effectively used as a fish preserve. [Explanation of symbols]

[0051] 1 Floating raft gate 2 Breakwater 3 Gate 4 Raft body 5 Float 6 Water 6a Water surface 6b Underwater 7 Inner bottom frame 8 Outer bottom frame 9 Upper frame 10 Lower connection body 11 Inner connector 12 Outer connector 13 Raft port side 14 Raft starboard side 15 First capturing means 16 Second capturing means 17 Net 18 Curtain 19 Weight 20 Protective material 21~24 Floating Raft Gate 25 Gate 26 Floating raft gate 27 Raft body 28 Float 29 Starboard side of raft 30 Overhanging body 31 Capturing body 32 Support 33 First capturing means 34 Second Capture Means 35 Arch 36 Connector 37 Raft port side 38 Plane plate

Claims

1. A floating raft gate for forming a gate to prevent the intrusion of drifting objects, A floating raft gate is characterized by having a float attached to the bottom of the raft body to enable it to float on the water, and also having a first capturing means for capturing drifting objects near the water surface and a second capturing means for capturing drifting objects in the water.

2. 2. A floating raft gate according to claim 1, wherein the first capturing means is formed to protrude beyond the raft body.

3. 3. A floating raft gate according to claim 1 or 2, characterized in that first and second catching means are provided on the port and starboard sides, facing each other.

4. A method for preventing drifting objects from entering using a floating raft gate, characterized in that a floating raft gate is provided with a float attached to the bottom of the raft body to enable it to float on the water, a first capture means for capturing drifting objects near the water surface, and a second capture means for capturing drifting objects floating underwater, and the floating raft gate is connected to a flow path through which drifting objects enter, thereby forming a gate to prevent drifting objects from entering through the flow path through which drifting objects enter.

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