Floating debris protection fence and fence panel

Abstract

To provide a floating debris protection fence having a function of a SOLAS fence as well as.SOLUTION: A floating debris protection fence (1) of the present invention comprises a plurality of posts (2) erected on the ground (G), a wire rope (3) stretched between the plurality of posts (2), a wire mesh (4) provided between the plurality of posts (2) on the outer side of the wire rope (3), and a sneak guard (7) provided at the upper end of the posts (2).SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a floating object protection fence for capturing floating objects such as driftwood when a tsunami or high tide occurs, and a fence panel used for the floating object protection fence.

Background Art

[0002] A tsunami barrier is installed as a floating object protection fence provided on a seawall, revetment, etc., to prevent the inflow of ships and floating objects onto land by a pushing wave and the outflow of ground cargo into the sea by a pulling wave when a tsunami or high tide occurs. In general, this tsunami barrier is provided so as to surround the periphery of the cargo placement space in order to avoid the outflow of the cargo placed on land to the periphery.

[0003] The tsunami barrier has, for example, a plurality of columns erected on the ground, a wave-breaking plate entirely installed between these columns, and a plurality of wire ropes connected to such a wave-breaking plate. The support of the wire ropes suppresses the bending of the lateral intermediate portion of the wave-breaking plate by the impact load of waves and floating objects (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] In ports such as seawalls and revetments where such conventional tsunami barriers are installed, there are wood, cars, ships, containers, etc. To prevent people from entering the cargo placement space, a solar fence for preventing people from entering is required. Here, the solar fence is a fence that satisfies a predetermined standard specification required to be installed based on the revised SOLAS Convention for the purpose of ensuring the safety of ships.

[0006] However, in the port where the tsunami barrier is installed, installing both the tsunami barrier and the solar fence requires a large amount of space, and it is not a favorable situation because both the tsunami barrier and the solar fence must be installed.

[0007] Therefore, the present invention has been made in view of the above problems, and an object thereof is to provide a driftwood protection fence having the function of a solar fence and a solar fence panel used for the driftwood protection fence.

Means for Solving the Problems

[0008] In the driftwood protection fence of the present invention for solving the above problems, it includes a plurality of columns erected on the ground, a wire rope spanned between the plurality of columns, a wire mesh provided outside the wire rope between the plurality of columns, and a return provided at the upper end of the column.

[0009] It is preferable that one side of the mesh of the wire mesh is 50 mm or less.

[0010] It is preferable that the return is inclined at a predetermined angle toward the outside of the driftwood protection fence with respect to the wire rope.

[0011] It is preferable that barbed wire is attached to the return.

[0012] It is preferable that the wire mesh has a height of at least 1.8 m or more.

[0013] In the fence panel of the present invention, it includes a rectangular frame body having the same width as the distance between adjacent columns in the driftwood protection fence, a wire mesh attached to the frame body, a return provided at the upper end of the vertical frame constituting the frame body, and a base plate horizontally extending in a direction opposite to the inclination direction of the return with respect to the lower end of the horizontal frame constituting the frame body.

[0014] Preferably, the base plate is fixed to the ground at a position inside the driftwood protection fence rather than the wire rope spanned between the columns.

[0015] Preferably, the wire mesh is fixed to the wire rope by a predetermined fixture.

[0016] Preferably, one side of the mesh of the wire mesh is 50 mm or less.

[0017] Preferably, the sneak return is inclined at a predetermined angle toward the outside of the driftwood protection fence rather than the wire rope.

[0018] Preferably, barbed wire is attached to the sneak return.

[0019] Preferably, the wire mesh has a height of at least 1.8 m or more.

Advantages of the Invention

[0020] According to the present invention, a tsunami barrier having the function of a solar fence can be realized.

Brief Description of the Drawings

[0021]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Embodiments for Carrying Out the Invention

[0022] Preferred embodiments of the present invention will be described with reference to the drawings, divided into a first embodiment and a second embodiment. Note that the first and second embodiments shown below are examples, and various embodiments can be adopted within the scope of the present invention.

[0023] <First Embodiment> FIG. 1 is a perspective view showing the overall structure of the tsunami barrier 1 having the function of the solar fence in the first embodiment of the present invention. FIG. 2 is a front view and a plan view showing the overall structure of the tsunami barrier 1 having the function of the solar fence in the first embodiment of the present invention. FIG. 3 is side views (A), (B), and (C) showing the structure of the support column 2 and the spacing member 6 of the tsunami barrier 1 having the function of the solar fence in the first embodiment of the present invention. FIG. 4 is a plan view showing the arrangement of the wire rope 3, the wire mesh 4, and the spacing member 6 of the tsunami barrier 1 having the function of the solar fence in the first embodiment of the present invention. FIG. 5 is side views (A) and (B) showing the structure of the backflow prevention 7 of the tsunami barrier 1 having the function of the solar fence in the first embodiment of the present invention.

[0024] In FIGS. 1 to 7, the upper side means the upper side in the vertical direction (up and down direction) with respect to the ground G, and the lower side means the lower side in the vertical direction with respect to the ground G. Also, the horizontal direction means a direction parallel to the ground G that is orthogonal to the vertical direction (up and down direction).

[0025] <Tsunami barrier> As shown in FIG. 1, the tsunami barrier 1 as a driftwood protection fence is arranged near the quay wall of the harbor. The tsunami barrier 1 is arranged so as to surround a loading space S for temporarily placing a load C (for example, lumber, etc.) loaded on a ship or a load C unloaded from a ship in a rectangular shape.

[0026] The tsunami barrier 1 does not completely surround the loading space S, but has at least one gate 11 through which a vehicle can pass in order to carry out the temporarily placed load C or carry the load C into the loading space S.

[0027] As shown in FIGS. 2 to 5, the tsunami barrier 1 includes a plurality of columns 2 (end columns 21 and intermediate columns 22), a wire rope 3, an expanded metal or welded wire mesh 4 made of an expanded metal or welded wire mesh that satisfies the standard performance and standard specifications of the revised Solar Treaty and is attached integrally with the wire rope 3, a fixture 5, a spacing member 6, and a detour 7.

[0028] Here, the standard performance and standard specifications defined in the revised Solar Treaty will be briefly explained. As the standard performance, it is stipulated that it has a sufficient height and structure to prevent people from easily entering, has sufficient strength and durability to withstand wind loads and heavy loads, has a structure and installation method that cannot be easily entered from below, the diameter of the mesh is such that it cannot be easily cut, etc.

[0029] As standard specifications, the effective height shall be 1800 mm or more or 2400 mm or more. An outward overhang shall be installed at the upper part (with a length of 450 mm or more, inclined 30 degrees or more outward, having barbed wire, and the interval between barbed wires shall be such that a person cannot easily intrude). The interval of the mesh shall be such that it is not easy to step on (one side of the mesh is 50 mm). There shall be a structure to prevent the turning up. The width of the clear zone shall be such that the outside of the fence is for preventing footholds for illegal intrusion, and the inside is the width necessary for early detection of illegal intrusion, etc. For the inside, it shall be 3 m, and for the outside, it shall be a width that does not impair the function of the fence, etc. are specified.

[0030] In the description of the first embodiment, the inside IN means the inner space from the wire rope 3 where the load C to be protected by the tsunami barrier 1 exists, and the outside OUT means the outer space from the wire rope 3 where the load C to be protected by the tsunami barrier 1 does not exist.

[0031] <Strut> The struts 2 are erected so as to be arranged in a straight line with respect to the ground G serving as the foundation. A plurality of struts 2 are arranged, and it has an end strut 21 that supports the end of the wire mesh 4 and an intermediate strut 22 that is arranged between the end struts 21 and supports the wire mesh 4. Hereinafter, when referring to the strut 2, it shall mean both the end strut 21 and the intermediate strut 22.

[0032] The end strut 21 is used, for example, as the strut 2 that constitutes the gate 11. All struts 2 other than these end struts 21 are intermediate struts 22, and they are arranged at a predetermined interval between the end struts 21.

[0033] In this case, the end strut 21 and the intermediate strut 22 have a height of 3.3 m considering the tsunami. However, it is not limited to this, and the height of the end strut 21 and the intermediate strut 22 may be about 2.0 m to 4.0 m.

[0034] That is, the end posts 21 and the intermediate posts 22 have an effective height of 1800 mm or more, or 2400 mm or more, in accordance with the standard specifications of the revised Solar Treaty, and both the end posts 21 and the intermediate posts 22 have the same height. Note that the end posts 21 and the intermediate posts 22 shall have sufficient strength and durability to withstand wind loads and heavy loads in accordance with the standard performance of the revised Solar Treaty.

[0035] In addition, the distance between the end post 21 and the intermediate post 22, and the distance between the intermediate posts 22 are set to 9 m, which is an integral multiple of the width of the fence of 3 m specified in the standard specifications of the revised Solar Treaty.

[0036] The end posts 21 and the intermediate posts 22 are configured to be stronger than the spacing maintaining members 6 so as to withstand the tension acting on the wire mesh 4 and the like. Specifically, the end posts 21 and the intermediate posts 22 have a larger diameter and a greater wall thickness than the spacing maintaining members 6, and the lower ends 21b of the end posts 21 and the lower ends 22b of the intermediate posts 22 are inserted into the steel pipe piles 25 embedded in the ground, and are fixed by filling them with mortar or the like. However, it is not limited to this, and the post 2 may be directly driven into the ground G via a base plate (not shown).

[0037] A plurality of pairs of through holes 2a facing each other are provided in the post 2 at regular intervals along the longitudinal direction of the post 2 according to the number of the wire ropes 3. For example, when there are six wire ropes 3 spanned between the posts 2, six sets of pairs of through holes 2a, that is, a total of twelve are formed.

[0038] <Wire Mesh> The wire mesh 4 is made of expanded metal or welded wire mesh, and serves as a catcher for objects washed away by waves in order to prevent the inflow of ships and floating objects onto the land by the pushing waves that rush from the sea to the land and the outflow of the goods in the loading space S into the sea by the pulling waves during the occurrence of tsunamis and high tides. Note that the wire mesh 4 is not limited to expanded metal or welded wire mesh, and may be diamond mesh or perforated metal.

[0039] The wire mesh 4 has the same vertical length (height) as the height of the support column 2 from the ground G. The height of the wire mesh 4 does not necessarily have to be the same as the height (3.3 m) of the support column 2 from the ground G. Corresponding to the standard specifications of the revised solar treaty, it may be 1.8 m (1800 m) or more or 2.4 m (2400 mm) or more as the effective height.

[0040] Also, the wire mesh 4 has the same width (9 m) as the length between the support columns 2. However, it is not limited to this. If the width between the support columns 2 is other than 9 m, the width of the wire mesh 4 may also be other than 9 m accordingly. Further, the wire mesh 4 conforms to the standard specifications of the revised solar treaty and has a mesh interval of 50 mm or less on one side where a person cannot easily step over.

[0041] Even if the width between the support columns 2 is 9 m, the wire mesh 4 may have a width (3 m) adjusted to the interval between the end support column 21 and the interval holding member 6, the interval between the interval holding members 6, and the interval between the interval holding member 6 and the intermediate support column. In this case, three wire meshes 4 may be fixed between the end support column 21 and the intermediate support column 22.

[0042] The wire mesh 4 is fixed to six wire ropes 3 spanned between the support columns 2. Actually, the wire mesh 4 and the wire rope 3 are fixed by a fixture 30 such as a U-bolt (not shown). Note that a nut 31 of the fixture 30 such as a U-bolt (Fig. 5) is fixed inside (IN) the wire rope 3 so that the fixture 30 is not damaged by an external person.

[0043] When the wire mesh 4 is fixed between the support columns 2, a state without a gap is formed between the lower end of the wire mesh 4 and the ground G, corresponding to the standard performance of the revised solar treaty, and a structure in which a person cannot easily enter from the lower part of the wire mesh 4 is realized.

[0044] <Fitting> The attachment 5 is for fixing the wire rope 3 to the support column 2. After the wire rope 3 is inserted through a pair of through holes 2a in the support column 2, it has a nut portion 52 (Fig. 2) that is fixed by screwing onto the bolt portion at the end of the wire rope 3 protruding outside the through hole 2a.

[0045] <Spacer member> The spacer member 6 is a cross-section L-shaped member, a cross-section hat-shaped member, or a rod-shaped member that is erected with respect to the ground G serving as a base in order to keep the distance between the wire ropes 3 constant. It has the same height as the end support column 21 and the intermediate support column 22, but has a smaller diameter than the end support column 21 and the intermediate support column 22.

[0046] Similar to the support column 2, the lower end 6b of the spacer member 6 is inserted into the steel pipe pile 65, and mortar or the like is filled therein to be fixed to the ground G. However, it is not limited to this, and the spacer member 6 may be directly driven into the ground G via a base plate (not shown).

[0047] The spacer member 6 is fixed to the wire rope 3 by a fixture (not shown) such as a U-bolt. The spacer members 6 are arranged at regular intervals so as to be linearly aligned between the end support column 21 and the intermediate support column 22.

[0048] For example, the distance between the end support column 21 and the spacer member 6, the distance between adjacent spacer members 6, and the distance between the spacer member 6 and the intermediate support column 22 are all the same and are set to 3 m in accordance with the standard specifications of the revised Solar Treaty.

[0049] <Sneak return> As shown in FIG. 5, the return bend 7 extends upward by 450 mm or more from the upper end of the spacing member 6 and is provided integrally with the spacing member 6 with an inclination angle α of 30 degrees or more outside (OUT) of the wire rope 3. The return bend 7 may be configured as a separate member from the upper end of the spacing member 6. In that case, both are integrally attached and fixed.

[0050] The return bend 7 is also provided in the same manner as the spacing member 6 with respect to the upper ends of the end strut 21 and the intermediate strut 22. The return bends 7 provided on the end strut 21 and the intermediate strut 22 are formed separately and fixed integrally therewith, but the present invention is not limited thereto, and the return bend 7 may be integrally formed in advance at the upper ends of the end strut 21 and the intermediate strut 22.

[0051] The return bends 7 provided on the spacing member 6 and the return bends 7 provided on the end strut 21 and the intermediate strut 22 are arranged linearly at the same inclination angle α and at equal intervals.

[0052] Barbed wire 71 (FIG. 2) is attached to the return bend 7 along the horizontal direction. Three barbed wires 71 are attached at regular intervals along the longitudinal direction of the return bend 7 such that a person cannot easily intrude. The number of barbed wires 71 is not limited to three, and may be three or less or three or more as long as an interval is formed such that a person cannot easily intrude.

[0053] <Effect> In the above configuration, the tsunami barrier 1 arranges the wire net 4 corresponding to the standard specification of the revised SOLAS Convention outside (OUT) of the wire rope 3 and the spacing member 6 and fixes them integrally with the wire rope 3.

[0054] As a result, the wire netting 4 of the tsunami barrier 1 can have the functions of both a floating object protection fence and a solar fence. Therefore, in the port where the tsunami barrier is installed, it is not necessary to install both the tsunami barrier and the solar fence, which can save space and reduce the manufacturing cost.

[0055] In this tsunami barrier 1, since the wire netting 4 is arranged outside (OUT) of the wire rope 3, it is possible to prevent an intruder from using the wire rope 3 as a foothold to break in. Furthermore, since the tsunami barrier 1 uses a wire netting 4 with a mesh of 50 mm intervals on each side, it is possible to prevent the intruder's feet from getting caught in the wire netting 4 in advance and prevent the intrusion of suspicious persons.

[0056] Also, in the tsunami barrier 1, by providing the sneak-back 7 that inclines outward with respect to the end support 21, the intermediate support 22, and the interval holding member 6, and providing the barbed wire 71 with respect to the sneak-back 7, it is possible to prevent intrusion from the outside and realize the function as a solar fence.

[0057] <Second Embodiment> The second embodiment of the present invention will be described with reference to FIGS. 6 and 7. FIG. 6 is a front view (A) and a side view (B) showing the configuration of the fence panel 300 used for the solar-compatible tsunami barrier 100 in the second embodiment of the present invention. FIG. 7 is a front view (A) and a side view (B) showing the overall configuration of the solar-compatible tsunami barrier 100 in which the fence panel 300 in the second embodiment of the present invention is attached to the tsunami barrier 200.

[0058] In this second embodiment, as shown in FIGS. 6 and 7, in which the corresponding parts to FIGS. 2 and 3 are given the same reference numerals, a solar-compatible tsunami barrier 100 is formed by combining the fence panel 300 of the present invention with the tsunami barrier 200.

[0059] This tsunami barrier 200 has the same basic configuration as the conventional tsunami barrier, but although there are columns 2 (end columns 21 and intermediate columns 22) and wire ropes 3, it is configured such that a wire mesh 4 and a spacing member 6 as in the first embodiment are not provided.

[0060] Also, in the tsunami barrier 200, since the spacing member 6 is not provided, the width between the end column 21 and the intermediate column 22 is 9 m. The configuration of the columns 2 and the wire ropes 3 in this tsunami barrier 200 is the same as that of the columns 2 and the wire ropes 3 of the tsunami barrier 1 in the first embodiment.

[0061] The fence panel 300 has a rectangular frame body 310, a wire mesh 320 fixed integrally with the frame body 310, and a bend-back 7. Note that the fence panel 300 has one bend-back 7, while the fence panel 300a has two bend-backs 7, so they are referred to as fence panel 300 and fence panel 300a for the purpose of distinguishing between the two.

[0062] The frame body 310 of the fence panel 300 is a rectangular frame made of metal or the like, and is composed of two vertical frames 310v and two horizontal frames 310h. The width of the frame body 310 is 3 m, and thus the overall width of three fence panels 300 (including the fence panel 300a) is the same as the width (9 m) between the end column 21 and the intermediate column 22.

[0063] At the upper end of one vertical frame 310v of the frame body 310, a bend-back 7 having the same configuration as in the first embodiment is integrally formed. In the fence panel 300a, bend-backs 7 are integrally formed at the upper ends of both of the two vertical frames 310v, respectively.

[0064] Similar to the first embodiment, the bend-back 7 extends 450 mm or more further upward from the upper end of the vertical frame 310v and is provided integrally with the vertical frame 310v with an inclination angle α of 30 degrees or more to the outside (OUT).

[0065] Further, on the lower horizontal frame 310h of the frame body 310, a base plate 330 made of a rectangular plate-like member protruding horizontally by a predetermined length toward the inner side (IN) opposite to the inclination direction of the sneak return 7 is provided. The lateral width of the base plate 330 is the same as that of the horizontal frame 310h of the frame body 310.

[0066] When the fence panel 300 is disposed between the end support 21 and the intermediate support 22, only the base plate 330 will enter the inner side (IN) of the wire rope 3 of the frame body 310. In this state, after the insertion material 340 is inserted into the steel pipe pile 335, the base plate 330 is fixed to the ground G by filling it with mortar or the like. However, the fixing method is not limited to this, and it may be fixed by various other fixing means.

[0067] <Effect> In the above configuration, the solar-powered tsunami barrier 100 in the second embodiment arranges three fence panels 300 (including the fence panel 300a) between the end support 21 and the intermediate support 22 with respect to the tsunami barrier 200 not provided with the spacing maintaining member, and fixes the base plate 330 of the frame body 310 to the ground G inside the wire rope 3.

[0068] Subsequently, in the solar-powered tsunami barrier 100, the vertical frames 310v of the frame bodies 410 of the adjacent fence panels 300 and the wire rope 3 are fixed by fixing tools such as U bolts. Thereby, the solar-powered tsunami barrier 100 has three fence panels 300 disposed between the end support 21 and the intermediate support 22 and integrated with the wire rope 3.

[0069] Even in this solar-compatible tsunami barrier 100, in addition to achieving the same effects as the tsunami barrier 1 in the first embodiment, it can be constructed simply by arranging three fence panels 300 between the end posts 21 and the intermediate posts 22 and fixing them to the ground G with the base plate 330. Therefore, it is possible to retrofit an existing tsunami barrier 200.

[0070] Also, the joining of the vertical frames 310v of adjacent fence panels 300 is achieved by bolt-jointing them to each other using the holes in the vertical frames 310v, and the fence panel 300 and the wire rope 3 are fixed by fixtures such as U-bolts. At this time, the two joined vertical frames 310v can perform the same function as the spacing retaining member 6.

[0071] As a result, even when the lateral width between the end post 21 and the intermediate post 22 is long and there is no spacing retaining member 6, the solar-compatible tsunami barrier 100 can be realized by arranging a plurality of fence panels 300 and fixing them to the wire rope 3.

[0072] Furthermore, in the solar-compatible tsunami barrier 100, since the lower horizontal frame 310h in the frame body 310 forms a very small gap with the ground G, or the horizontal frame 310h is in contact with the ground G, the presence of the horizontal frame 310h prevents unauthorized persons from entering from below the fence panel 300, realizing a structure where people cannot easily enter. That is, since the fence panel 300 is composed of a frame body, at the ground level, the lower horizontal frame 310h of the fence panel 300 exists and can prevent entry from below.

[0073] Also, in the solar-compatible tsunami barrier 100, since the base plate 330 of the frame body 310 is fixed to the ground G at a position inside (IN) the wire rope 3, it is impossible for unauthorized persons to remove the base plate 330 from the ground G, and unauthorized entry can be more effectively prevented.

[0074] Note that, in the fence panel 300, the inclination direction of the sneak return 7 is outside (OUT) of the wire rope 3, whereas the direction in which the base plate 330 is arranged is inside (IN) of the wire rope 3.

[0075] Therefore, the fence panel 300 can be attached to the tsunami barrier 200 in a well-balanced standing state without the imbalance that the fence panel 300 greatly tilts to either the outside (OUT) or the inside (IN).

[0076] Thus, the fence panel 300 can be easily attached to the tsunami barrier 200 by retrofitting, so that the existing tsunami barrier 200 can be easily changed to the solar-compatible tsunami barrier 100.

[0077] <Other Embodiments> In the first embodiment of the present invention, the case where the interval holding member 6 is used in the tsunami barrier 1 has been described. However, the present invention is not limited to this, and the interval holding member 6 may not be used in the tsunami barrier 1.

[0078] Also, in the above-described second embodiment, the case where a plurality of fence panels 300 are arranged and fixed between the end strut 21 and the intermediate strut 22 of the tsunami barrier 200 that does not use the interval holding member 6 has been described. However, the present invention is not limited to this, and the fence panels 300 may be arranged and fixed between the end strut 21 and the interval holding member 6 of the tsunami barrier 1 that uses the interval holding member 6, between the interval holding members 6, and between the interval holding member 6 and the intermediate strut 22, respectively.

[0079] In the first and second embodiments of the present invention, the case where a plurality of features corresponding to the standard specifications of the revised solar treaty are provided has been described. However, the present invention is not limited to this, and other various features corresponding to the revised solar treaty other than those shown in the first and second embodiments may be provided.

[0080] The preferred first and second embodiments of the present invention have been described above. However, the present invention is not limited to the above-described first and second embodiments, and includes all aspects included in the concept and scope of claims of the present invention. Further, each component may be selectively combined as appropriate so as to achieve at least a part of the above-described problems and effects. Further, for example, the shape, material, arrangement, size, etc. of each component in the above-described embodiment can be appropriately changed according to the specific usage mode of the present invention.

Description of Reference Numerals

[0081] 1, 200... Tsunami barrier, 2... Support column, 21... End support column, 22... Intermediate support column, 25... Steel pipe pile, 3... Wire rope, 4... Wire mesh, 5... Fixture, 30... Fastener, 31... Nut, 52... Nut portion, 6... Spacing retaining member, 65... Steel pipe pile, 7... Sway-back, 11... Gate, 100... Solar-compatible tsunami barrier, 300, 300a... Fence panel, 310... Frame body, 310v... Vertical frame, 310h... Horizontal frame, 330... Base plate, 335... Steel pipe pile, 340... Insertion member, C... Cargo, G... Ground, S... Loading space.

Claims

1. A plurality of columns erected on the ground, A wire rope spanned between the plurality of columns, A wire mesh provided outside the wire rope among the plurality of columns, A deflecting member provided at the upper end of the column, A driftwood protection fence comprising the above.

2. The wire mesh has a side length of the mesh opening of 50 mm or less. The driftwood protection fence according to Claim 1.

3. The deflecting member is inclined at a predetermined angle toward the outside of the driftwood protection fence with respect to the wire rope. The driftwood protection fence according to Claim 1.

4. Barbed wire is attached to the deflecting member. The driftwood protection fence according to Claim 3.

5. The wire mesh has a height of at least 1.8 m or more. The driftwood protection fence according to Claim 1.

6. A rectangular frame having the same width as the distance between adjacent columns in the driftwood protection fence, A wire mesh attached to the frame, A deflecting member provided at the upper end of the vertical frame constituting the frame, A base plate horizontally extending in a direction opposite to the inclination direction of the deflecting member with respect to the lower end of the horizontal frame constituting the frame, A fence panel comprising the above.

7. The base plate is fixed to the ground at a position inside the driftwood protection fence with respect to the wire rope spanned between the columns. The fence panel according to Claim 6.

8. The wire mesh is fixed to the wire rope by a predetermined fixture. The fence panel according to Claim 7.

9. The wire mesh has a side length of the mesh opening of 50 mm or less. The fence panel according to Claim 6.

10. The deflecting member is inclined at a predetermined angle toward the outside of the driftwood protection fence with respect to the wire rope. The fence panel according to Claim 7.

11. Barbed wire is attached to the deflecting member. The fence panel according to Claim 10.

12. The wire mesh has a height of at least 1.8 m or more. The fence panel according to Claim 6.

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