JP2003261910A - Protective body using net and protective structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a protective body, which has excellent workability, in which a construction method is simplified, the works are executable at a low cost and a using net is exchanged easily. <P>SOLUTION: The protective body 1 has a protective surface 11M composed of the net 11. A knotless net made of a synthetic resin is used as the net 11. The net 11 and an installation means 21 are carried in at the place of an installation, the net 11 is installed by the installation means 21 and the protective body 1 is formed. The net 11 is lightweight, large-scale heavy machinery are made unnecessary in a construction transport, and the protective body 1 can be mounted even at a place topographically restricted in the execution of works. Since the net 11 made of the synthetic resin has flexibility, the net can be compacted by a winding or the like in the case of a carrying-in, and workability at a site is also improved at the same time. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective body using a net having a surface for receiving snow, rockfall, wind, etc. and a protective structure using a net for preventing rockfall.

[0002]

2. Description of the Related Art Conventionally, there has been known a protective fence constructed on a slope of a hillside or the like to receive falling rocks or snow and prevent falling or inflow to a road or the like, for example, JP-A-7-19742.
In Japanese Patent Publication No. 3, a vertical hole is drilled at intervals on the slope of the hillside, pipe struts built in the vertical hole are installed in parallel, and a wire mesh is stretched on each of these pipe struts along with a plurality of stages of cables. A protective fence for falling rocks has been proposed, and a wire mesh is used for the protective surface.

Further, the present invention relates to a net used for a protective surface, and is disclosed in
In Japanese Patent Publication No. 00-273827, the protective net is made of steel or wires such as rigid wires attached in parallel, knitted on the net with the rigid wires, and a combination of a plurality of horizontal rope members and wire nets. It is described as including various known nets (Gazette No. 0011).

As in the above-mentioned prior art, in the protective body using this type of net, a road rope or the like is protected from falling rocks by combining a wire rope or a net made of steel.

However, in the case of using a steel wire rope or net, since the members themselves are heavy objects, heavy equipment for installation is required, the construction range is restricted, the construction period is prolonged, and the construction cost is increased. There is. And since the protective body provided for rockfall protection is often provided on the slope of a mountain that is not suitable for use of heavy equipment, in the construction of providing the protective body on the slope of such a mountain, the member is heavy. Then, the carrying-in work becomes complicated and there is a problem that the workability is poor.

By the way, when performing various works in mountainous areas, etc., a temporary protective body is required only during the work period,
It may be necessary to remove the protective body after the construction is completed. On the other hand, in the case of the conventional fence, repairs or replacement of the net etc. are performed when repairs are required due to falling rocks, etc., or when the service life has expired. Is not suitable for.

It is an object of the present invention to provide a protective body and a protective structure using a net, which has excellent workability, can be constructed at a low cost by simplifying the construction method, and can easily replace the net. The purpose of the present invention is to provide a protective body and a protective structure using a net that also has an excellent shock absorbing function.

[0008]

According to a first aspect of the present invention, there is provided a protective body having a surface made of a net, the net being made of a synthetic resin, and the net having an installation means for installing the net at an installation place. .

According to the structure of claim 1, the net and the installation means are carried into the installation place, and the net is installed by the installation means to form the protective body. Further, since the net is made of synthetic resin, it is light in weight, large heavy equipment such as a crane is not required for construction transportation, and a protective body can be installed even in a place where construction is restricted geographically. In addition, since the net made of synthetic resin has flexibility, it can be made compact by winding it at the time of loading, and at the same time workability at the site is improved.

Further, in the invention of claim 2, the network is a knotless network.

According to the second aspect of the present invention, since the wire material forming the net is formed straight without being tied at the intersection, when a force is applied to the net, the force is dispersed throughout the net. , High shock absorption function can be obtained. Also, because there are no knots, it is lighter by that amount, stacking, folding,
When rolled, it becomes compact.

In the knotted net, when the wire is tied at the crossing portion, the tensile force is concentrated on the wire at the crossed portion, so that portion is apt to be weak. However, the knotless net does not have such a problem and has a high impact absorption. The function is obtained.

According to a third aspect of the present invention, the installation place has a side wall on both sides, and both sides of the net are fixed to the side walls on both sides.

According to the third aspect of the present invention, the net and the setting means are carried into the site, and both sides of the net are fixed to the side walls by the installing means to install the protective body. This protective body is inexpensive and can be easily constructed, and is a protective body against falling rocks, avalanches and winds in the stream. Especially, the construction cost can be reduced by utilizing the side wall of the stream.

According to a fourth aspect of the present invention, the installation means includes columns that are erected at intervals, and the net is stretched between the columns.

According to the fourth aspect of the present invention, the net and the setting means are carried into the site, the pillar is erected, and the net is fixed to the pillar to install the protective body. This protective body is inexpensive and easy to construct, and is a protective body against falling rocks and avalanches.

According to a fifth aspect of the present invention, the installation means includes a fixing means for fixing the net between the trees.

According to the fifth aspect of the invention, the net and the setting means are carried into the site, and the net is fixed to the standing tree by the installation means to install the protective body. This protective body is inexpensive and easy to construct, and is a protective body against falling rocks, avalanches, wind, etc. In particular, the cost of construction can be reduced by using standing trees.

According to a sixth aspect of the present invention, the installation place is on a side of a road, and the installation means includes columns that are erected at intervals, and the net is stretched between the columns. is there.

According to the sixth aspect of the present invention, the net and the setting means are carried into the site, the pillar is erected, the net is fixed to the pillar, and the protective body is installed on the side of the road. This protective body is inexpensive and can be easily constructed, and serves as a protective body against falling rocks, avalanches, etc. Furthermore, it can prevent the occurrence of snowdrifts in snowy areas.

Further, the invention of claim 7 is a protective structure for covering a slope with a net, wherein the net is made of synthetic resin and is provided with an installation means for installing the net on the slope.

According to the structure of claim 7, a net is installed on the slope where rocks and boulders are generated to form a protective structure. This protective structure is inexpensive and easy to construct, and provides protection against falling rocks and avalanches.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the protective body of the present invention will be described below with reference to FIGS. As shown in the figure, the protective body 1 comprises a net 11 and an installation means 21 for installing the net 11, and the net 11 forms a protective surface 11M.
In this example, the protective body 1 is provided on the mountain stream 101.

As shown in FIGS. 4 to 6, the net 11 is a penetrating type untied net made of synthetic resin. For example, a plurality of fiber threads 12, 12A made of synthetic resin are twisted together to form a wire 13, 13A. Formed, these wire rods 13 and 13A form a crossing direction, and a crossing portion 14
Are fixed to each other by the muscles that are not connected. There is a Russell type for the knotless net, but a through type is preferably used. FIG. 4 is an explanatory diagram for explaining the structure. As shown in FIG. 4, one of the wire rods 13 and 13A has an intersection 14 and one wire rod 13
The fiber thread 12A, 12A of the other wire 13A is inserted from the front-rear direction into the ring portion 15 formed by the gap between the fiber thread 12, 12 of the other, and the fiber thread 12, 12A is twisted also at the crossing portion 14. By closing the ring portions 15 and 15A, both wire rods 13 and 13A are fixed at the intersection portion 14. In addition, 15A is an intersection 14 and the fiber yarn is
It is a ring portion formed by a gap between 12A and 12A. 4 shows the ring portions 15 and 15A opened for the sake of explanation, but in the actual net 11, the ring portions 15 and 15A have a closed structure.

The net 11 has a substantially rectangular shape, and rope members 16 are provided at the edges of the net 11, and metal ring bodies 17 are provided on four sides of the rope member 16. In addition, as shown in FIGS. 5 and 6, the ends of the wire rods 13 and 13A in the rope member 16 are folded back, and the wire rods 13 and 13A are overlapped at the overlapping portions 18 of the wire rods 13 and 13A.
A is fixed to each other, and the rope material 16 is placed between the front and back wire rods 13 and 13A.
To place.

As the synthetic resin used for the net 11, high density polyethylene or the like is suitable. When the high density polyethylene is used, the specific gravity of the net 11 is 0.94 to 0.96. If necessary, weather resistance can be improved by using carbon black or an ultraviolet absorber for the net 11.

The swamp 101 has side walls 102, 102 on both sides facing the mountain side.
And a recess 103 is formed between the side walls 102.

The setting means 21 comprises a lock bolt 22 and a connecting ring 23 for detachably connecting the lock bolt 22 to the ring body 17.
And a shackle or the like is used as the connecting ring 23. In addition, an auxiliary net 24 is connected to the lower part of the net 11 at a connecting portion 25.
Connect by. As the auxiliary net 24, a wire having a substantially the same structure as the net 11 is used except that the wire is thinner than the net 11.

In the construction of the protective body 1, the side wall 10
The upper parts of the nets 11 are fixed to the upper parts of the meshes 2 and 102 with the lock bolts 22, and the lower parts of the nets 11 are fixed to the bottom parts of the sidewalls 102 and 102 with the lock bolts 22. After the lock bolt 22 is installed and fixed, the connecting ring 23 provided at the tip of the lock bolt 22 is connected to the ring body 17.
Further, the lower side of the auxiliary net 24 is laid on the mountain side Y of the depression 103,
The laid portion is fixed to the depression 103 at a plurality of locations with lock bolts 22. This can prevent falling rocks and the like from passing through the lower portion of the net 11 and the depression 103. In addition, as shown in FIG.
11 is preliminarily bent in the vertical direction. By giving the bending in this way, it is possible to effectively absorb a shock such as a rock fall.

As described above, in the present embodiment, in accordance with claim 1, in the protective body 1 having the protective surface 11M which is the surface made of the net 11, the net 11 is made of synthetic resin, and the net 11 is installed at a place. Since the net 11 and the installation means 21 are carried into the installation place, the net 11 is installed by the installation means 21, and the protective body 1 is formed. Further, the net 11 is made of synthetic resin so that it is light in weight, large heavy equipment is not required for construction transportation, and the protective body 1 can be installed even in a place where construction is restricted geographically. Further, since the net 11 made of synthetic resin has flexibility, it can be made compact by winding it at the time of loading, and at the same time workability at the site becomes good.

As described above, in this embodiment, since the net 11 is a knotless net according to claim 2, the wires 13 and 13A forming the net 11 are straight without being tied at the intersection 14. Therefore, when a force such as a rock fall is applied to the net 11, the force is dispersed throughout the net 11, and a high shock absorbing function is obtained. Also, since there are no knots, it is lighter and thinner, and when stacked, folded, or rolled,
It becomes compact.

As described above, according to the third embodiment, the installation place is the stream 101 having the side walls 102 and 102 on both sides, and both sides of the net 11 are fixed to the side walls 102 and 102 on both sides. Therefore, the net 11 and the setting means 21 are brought in to the site, and both sides of the net 11 are fixed to the side walls 102, 102 of the swab 101 by the setting means 21 to install the protective body 1. This protective body 1 is inexpensive and can be easily constructed, and becomes the protective body 1 against rockfall, avalanche, wind, etc. in the stream. Especially, by using the side wall of the swamp 101, the construction cost can be reduced.

Further, as an effect of the embodiment, since the net 11 is made of synthetic resin and is relatively lightweight, when the protective body 1 is used for temporary construction, for example, when civil engineering work is performed on the valley side of the swamp 101. During the construction period, the protective body 1 is used, and after the construction is completed,
11, 24 can be easily removed and removed. Further, the lock bolt 22 can be left as it is and the nets 11 and 24 can be stretched and used only when necessary.

FIGS. 7 to 9 show a second embodiment of the present invention. The same parts as those in the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted. This is an example in which the space between the side walls 102, 102 in the swamp 101 is relatively wide, and the setting means 21 is provided with a pillar 31, and the rope material 16 on the upper part of the net 11 is detachably fixed to the upper part of the pillar 31.
The pillar 31 is made of steel pipe or the like, and has a mounting plate 32 at the bottom.
The mounting plate 32 has a hole 33 formed therein. In addition, a support portion 34 for a support is provided in the depression 103. The column fixing portion 34 is formed by integrally setting a biting leg portion 35 on the lower surface of a mounting plate 32A having a hole 33. Corresponding to the standing position of the column 31, while installing the column fixing portion 35,
Insert the lock bolt 36 inserted into the hole 33 of the mounting plate 32A into the recess 103
Then, the upper end of the lock bolt 36 is projected above the mounting plate 32A. A male screw portion 37 is formed on the lock bolt 36. And the mounting plate 32 of the column 31
Align the hole 33 of the mounting plate 32 with the lock bolt 36 and attach the mounting plate 32 to the mounting plate.
It is placed on 32A and the nut 38 is screwed to the female screw part 37 to fix the support 31 on the support fixing part 34. The connecting ring 23 is provided on the upper part of the support column 31, and the connecting ring 23 is connected to the rope member 16 on the net 11. In addition, as shown in FIG.
11 is preliminarily bent in the vertical direction.

Further, one end of the retaining rope 41 is connected to the upper portion of the support column 31, and the other end of the retaining rope 41 is fixed to the ground on the mountain side Y of the protective body 1 by the lock bolt 42. By providing connecting rings or the like at both ends of the backup rope 41, the backup rope 41 can be detachably connected to the support column 31 and the lock bolt 42, respectively.

Therefore, the connecting ring 23 causes the lock bolt
The nets 11 and 24 can be detached from the 22 and the column 31, and
By removing the nut 38, the pillar 31 can also be attached and detached.

As described above, in this embodiment, the first to third aspects are described.
Corresponding to the above, the same operation and effect as those of the above-described first embodiment can be obtained, and in this example, corresponding to claim 4, the installation means 21 is provided with the support columns 31 and 31 which are erected at intervals. And the net 11 is stretched over these struts 31, 31, the net 11 and the setting means
21 and 21 are brought in to the site, a pillar 31 is erected, and a mesh is attached to this pillar 31.
Fix 11 and install protective body 1. This protective body 1 is inexpensive and can be easily constructed, and becomes the protective body 1 against falling rocks and avalanches.

10 to 11 show a third embodiment of the present invention, in which the same parts as those in the above-mentioned embodiments are designated by the same reference numerals, and detailed description thereof will be omitted. 1
Is a net 11 stretched between standing trees 111, 111 on the slope of a mountain, and fixing means 51 are attached to the top and bottom of the standing trees 111, 111.
The fixing means 51 is a mounting band 52 with the connecting ring 23, and the mounting band 52 is wound around the tree 111 to be fixed, and the connecting rings 23, 23, 23, 23 are connected to the four corners of the net 11. Body 17, 17, 17,
Connect to 17 respectively. Further, the auxiliary net 24 is fixed to the ground by a bladed anchor 53. As shown in FIG. 11, the net 11 is preliminarily bent in the vertical direction.

For the mounting band 51, a material that has little influence on the standing tree 111 is selected.
By removing the attachment band 51 from 111, it is possible to return to a state close to that before the protection body 1 is constructed, which is suitable for temporary construction.

As described above, in this embodiment, in response to claims 1 and 2, the same operation and effect as those of the above-described examples are exhibited, and in this example, the installation means corresponds to claim 5.
Since 21 includes the fixing means 51 for fixing the net 11 between the standing trees 111, 111, the net 11 and the setting means 21 are carried into the site and the fixing means 51 of the setting means 21 fixes the net 11 to the standing tree 111. Install protective body 1. This protective body 1 is inexpensive and can be easily constructed, and becomes the protective body 1 against falling rocks, avalanches, winds and the like. Especially, in this example, the construction cost can be reduced by using the standing tree 111.

12 to 13 show a fourth embodiment of the present invention, in which the same parts as those of the above-mentioned embodiments are designated by the same reference numerals, and detailed description thereof will be omitted. 1
Is a plurality of pillars 61 standing on the side of the road 121 at intervals, and the net 11 is stretched between the pillars 61.
A backup rope 62 is provided on both sides of the pillar 61.
Both ends of 62 are fixed to the upper part of the pillar 61 and the ground.

If the protective body 1 is installed on the road 121 in the snowy area, the net 11 can prevent the occurrence of snow accumulation on the road 121.

As described above, in the present embodiment, according to claim 1, in the protective body 1 having the protective surface 11M made of the net 11, the net 11 is made of synthetic resin, and the net 11 is installed at the installation place. The setting means 21 has a support column 61, and has the same operation and effect as those of the above-described embodiments, corresponding to claims 2 and 4.

As described above, in this embodiment, in accordance with claim 6, the installation place is on the side of the road 121, and the installation means 21 is provided with the pillars 61 standing upright at intervals. ，
Since the net 11 is stretched between 61, the net 11 and the setting means 21 are carried into the site, the pillar 61 is erected, the net 11 is fixed to the pillar 61, and the protective body 1 is set beside the road 121. Install. This protective body 1 is inexpensive and can be easily constructed, becomes a protective body 1 against falling rocks, avalanches, and the like, and further, in a snowy area, it is possible to prevent the occurrence of a snowdrift.

14 to 15 show a fifth embodiment of the present invention, in which the same parts as those in the above-mentioned embodiments are designated by the same reference numerals, and detailed description thereof will be omitted. 1
Is installed with a plurality of columns 61 at intervals,
The net 11 is stretched in between, and a supporting rope 62 is provided on both sides of the supporting column 61, and both ends of the supporting rope 62 are supported by the supporting column 61.
Is fixed to the upper part of the ground and the ground, and further, the lower part of the pillar 61 is fixed by an anchor 63, and the retaining rope 62 and the ground are fixed by a winged anchor 64. If set aside, it can prevent snow and wind, and can also prevent small animals from entering the road.

FIG. 16 shows a sixth embodiment of the present invention, in which the same parts as those in the above-mentioned embodiments are designated by the same reference numerals, and detailed description thereof will be omitted. In this example, the slope 131 is protected. A protective structure 71 is shown, in which the mountain slope 13
1, a pillar 72 is erected, the net 11 is fixed to the upper part of the pillar 72, the valley side slope 131 is covered by the lower part of the net 11, and the lower part of the mesh is fixed to the slope 131 by an anchor or the like. The upper part of the net 11 is stretched apart from the slope. In addition, between the upper part of the column 72 and the slope 131 on the mountain side Y, the backup rope 7
3 are stretched.

Therefore, even if a boulder R is generated above the column 72, it can be received and protected by the lower surface of the net 11, and the boulder R can be prevented from being generated in the portion covered with the net 11.

As described above, according to the seventh embodiment, in the protection structure 71 for covering the slope 131 with the net 11, the net 1 is used.
1 is made of synthetic resin, and is provided with the installation means 21 for installing the net 11 on the slope 131, and the installation means 21 has the pillars 72. Therefore, the net 11 is installed on the slope 131 where rock fall and boulders occur, and the protection structure
Forming a one. This protective structure 71 is inexpensive and easy to construct, and is a protective structure against falling rocks and avalanche.

17 to 18 show a seventh embodiment of the present invention. The same parts as those in the above-mentioned embodiments are designated by the same reference numerals, and detailed description thereof will be omitted.
In this example, the entire net 11 covers the slope 131, and the net 11 is fixed to the slope 131 by the anchor 82 and the lock bolt 83 which are the installation means 21 in this example.

As described above, according to the seventh embodiment, the same action and effect as those of the sixth embodiment can be obtained in accordance with the seventh aspect.

The present invention is not limited to the above embodiment, but various modifications can be made within the scope of the gist of the present invention. For example, the protective body of the present invention may be used for preventing outflow of timber. Further, the protective bodies and protective structures of all the examples can be used for temporary construction. For temporary construction, a net can be provided when necessary, and the net can be removed when no longer needed.

[0052]

According to the invention of claim 1, in a protective body having a surface made of a net, the net is made of synthetic resin, and the net is provided with an installation means for installing the net at an installation place. It is possible to provide a protective body using a net which is excellent, allows a simple construction method and can be constructed at a low price, and can easily replace the net.

According to the second aspect of the invention, the net is a knotless net, and the shock absorbing ability is excellent.

According to a third aspect of the present invention, the installation place is a stream having side walls on both sides, and both sides of the net are fixed to the side walls on both sides. Therefore, the workability is excellent, the construction method is simplified, and the cost is low. It is possible to provide a protective body using a net that enables construction and is easy to replace.

Further, the invention of claim 4 is characterized in that the installation means is provided with columns which are erected at intervals, and the net is stretched between the columns, which is excellent in workability and simplifies the construction method. Thus, it is possible to provide a protective body using a net that enables low-cost construction and is easy to replace.

Further, the invention of claim 5 is characterized in that the installation means is provided with a fixing means for fixing the net between standing trees, which has excellent workability and simplifies the construction method and enables construction at a low cost. It is possible to provide a protective body using a net that allows easy exchange of the net.

Further, the invention of claim 6 is characterized in that the installation place is on a side of a road, and the installation means is provided with pillars standing upright at intervals, and the net is stretched between the pillars. Therefore, it is possible to provide a protective body using a net which has excellent workability, enables a simple construction method and can be constructed at a low price, and can easily replace the net.

The invention according to claim 7 is a protective structure for covering a front slope with a net, wherein the net is made of synthetic resin and is provided with an installation means for installing the net on the slope. It is possible to provide a protective structure against falling rocks and avalanches.

[Brief description of drawings]

FIG. 1 is a front view of a protective body showing a first embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a front view of the main part of the same.

FIG. 4 is a front view for explaining the structure of the net.

FIG. 5 is a plan development view of the end portion of the net, showing the net and the rope material.

FIG. 6 is a side view of the net with a partial cross section, FIG. 6 (A) showing a state in which rope members are overlapped on the end side of the net, and FIG. 6 (B) shows the end of the net. Shows a state in which the part is folded back to form an overlapping part.

FIG. 7 is a front view of a protective body showing a second embodiment of the present invention.

FIG. 8 is a side view of the same.

FIG. 9 is a sectional view of the lower part of the support column of the same as above.

FIG. 10 is a front view of a protective body showing a third embodiment of the present invention.

FIG. 11 is a side view showing a part of the same as above.

FIG. 12 is a front view of a protective body showing a third embodiment of the present invention.

FIG. 13 is a side view showing a part of the same as above.

FIG. 14 is a front view of a protective body showing a fourth embodiment of the present invention.

FIG. 15 is a side view showing a part of the same as above.

FIG. 16 is a sectional view of a protective structure showing a fifth embodiment of the present invention.

FIG. 17 is a sectional view of a protection structure showing a sixth embodiment of the present invention.

FIG. 18 is a plan view of the same.

[Explanation of symbols]

1 protective body 11 mesh 11M protective surface (surface) 21 Installation means 31 prop 101 swamp 102 Side wall 103 depression 111 Standing tree 51 Fixing means 121 road 61 prop 131 slope 71 Protective structure 81 Protective structure Y mountain side

Continued front page    (71) Applicant 501228635             Sanwa Design Co., Ltd.             4-5-7 Sumiyoshi, Hakata-ku, Fukuoka City, Fukuoka Prefecture (72) Inventor Yutaka Hosokawa             91 Tsukioka Nishimidoricho, Toyama City, Toyama Prefecture F-term (reference) 2D001 PA05 PA06 PA07 PB04 PC03                       PD06 PD10 PD11

Claims (7)

[Claims] 1. A protective body having a mesh surface,
A protective body using a net, characterized in that the net is made of synthetic resin and is provided with an installation means for installing the net at an installation place. 2. The protective body using a net according to claim 1, wherein the net is a knotless net. 3. The protector using a net according to claim 1, wherein the installation place is a ridge having side walls on both sides, and both sides of the net are fixed to the side walls on both sides. 4. The net according to any one of claims 1 to 3, wherein the installation means includes columns that are erected at intervals and the net is stretched between the columns. Protective body using. 5. The setting means comprises a fixing means for fixing the net between standing trees.
Protective body using the described net. 6. The installation place is at a side of a road, and the installation means includes columns that are erected at intervals, and the net is stretched between the columns. Two
Protective body using the described net. 7. A protective structure for covering a slope with a net, characterized in that the net is made of synthetic resin and is provided with an installation means for installing the net on the slope.