JPS6321761B2 - - Google Patents
Info
- Publication number
- JPS6321761B2 JPS6321761B2 JP55154239A JP15423980A JPS6321761B2 JP S6321761 B2 JPS6321761 B2 JP S6321761B2 JP 55154239 A JP55154239 A JP 55154239A JP 15423980 A JP15423980 A JP 15423980A JP S6321761 B2 JPS6321761 B2 JP S6321761B2
- Authority
- JP
- Japan
- Prior art keywords
- snow
- protection device
- perforated sheet
- road
- sheet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 230000002265 prevention Effects 0.000 description 17
- 239000011148 porous material Substances 0.000 description 6
- ZPUCINDJVBIVPJ-LJISPDSOSA-N ***e Chemical compound O([C@H]1C[C@@H]2CC[C@@H](N2C)[C@H]1C(=O)OC)C(=O)C1=CC=CC=C1 ZPUCINDJVBIVPJ-LJISPDSOSA-N 0.000 description 5
- 241001609370 Puschkinia scilloides Species 0.000 description 4
- 229920003002 synthetic resin Polymers 0.000 description 4
- 239000000057 synthetic resin Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- -1 polyethylene Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 238000007688 edging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Landscapes
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Description
【発明の詳細な説明】 本発明は防雪用透孔シートに関する。[Detailed description of the invention] The present invention relates to a perforated sheet for snow protection.
現在、国内で主として使用されている防雪装置
は、柱体を立設し、柱体間に細長い平板（スラツ
ト）を架設した防雪柵である。欧州においてもハ
イウエー（道路）上への雪の吹きだまりを防止す
るため、水平スラツトタイプあるいは垂直スラツ
トタイプの防雪柵が使用されている。例えばハイ
ウエーに沿つて防雪柵を設置する際、その位置は
ハイウエーから風上の防雪柵までの距離を防雪柵
の高さの10〜15倍にすれば好適であるといわれて
いる。 Currently, the snow protection device mainly used in Japan is a snow protection fence that has pillars erected and elongated flat plates (slats) installed between the pillars. In Europe as well, horizontal or vertical slat type snow fences are used to prevent snow from drifting onto highways (roads). For example, when installing a snow fence along a highway, it is said that it is appropriate to set the distance from the highway upwind to the snow fence 10 to 15 times the height of the snow fence.
ところがこれらスラツトタイプの防雪柵を道
路、鉄道線路に沿設すると、その高さが２〜３ｍ
もあるので、沿線の景観を遮断し、ドライバー或
いは乗客に違和感を与える結果になつていた。 However, when these slat-type snow fences are installed along roads and railroad tracks, their height increases by 2 to 3 meters.
As a result, the scenery along the railway line was blocked off, giving drivers and passengers a sense of discomfort.
本発明者は、上記実情に鑑み、道路・鉄道線路
に沿設しても、沿線の景観が遮断されず、防雪機
能を十分発揮させる防雪装置を提供すべき鋭意研
究を行つた。本発明者による防雪装置は一般に吹
きだめ式と称し、通常道路や鉄道線路の風上に設
け、地吹雪によつて運ばれてくる雪を防雪装置の
風上側及び防雪装置と道路（あるいは鉄道線路）
間に堆積させ道路上（あるいは鉄道線路）への堆
積を極力防止しようとするものである。 In view of the above-mentioned circumstances, the inventors of the present invention conducted intensive research to provide a snow protection device that, even when installed along road/railway tracks, does not block the view of the area and fully exhibits its snow protection function. The snow prevention device proposed by the present inventor is generally referred to as a snowdrift type, and is usually installed upwind of a road or railroad track, and the snow carried by the ground blizzard is collected on the windward side of the snow prevention device and between the snow prevention device and the road (or railroad track). )
The aim is to prevent the accumulation on roads (or railway tracks) as much as possible.
これらの現象を発生させるには、先づ防雪装置
の風上側で小さな乱流を生起させ且つ風下直下で
瞬間的に大きな乱流を生起させ、その直後急激に
その乱流を消失させるとともに、風速も防雪装置
の風下側で漸次減垂させ道路（あるいは線路）上
付近で再び風速を上昇させる必要がある。 In order to generate these phenomena, first a small turbulent flow is generated on the windward side of the snow protection device, and a large turbulent flow is instantaneously generated immediately below the leeward side. It is also necessary to gradually reduce the wind speed on the leeward side of the snow protection device and increase the wind speed again near the road (or railway).
本発明者は沿線の景観を遮断させず上記現象を
生起させるために防雪装置がスラツトの組立てに
よるものではなく全体に均一に孔のあいたシート
状体を使用した防雪装置であることが必要であ
り、且つ上記現象を生起させるには透孔シートの
孔の大きさ及び孔の占める割合（開孔率）が決定
的な因子になることに着目し種々検討した。特に
透孔シートの透孔の平均直径により乱流の生成位
置、大きさおよび乱流の消失の現象が、又透孔シ
ートの開孔率により風速の減衰が決定されること
を見い出し本発明に到達した。 In order to cause the above-mentioned phenomenon without blocking the scenery along the railroad, the inventor of the present invention found that it is necessary for the snow prevention device to be a snow prevention device that uses a sheet-like body with holes uniformly perforated throughout, rather than by assembling slats. , and various studies were conducted focusing on the fact that the size of the pores in the perforated sheet and the ratio of the pores (porosity) are decisive factors in causing the above phenomenon. In particular, it was discovered that the position and size of turbulent flow and the phenomenon of disappearance of turbulent flow are determined by the average diameter of the pores in a perforated sheet, and the attenuation of wind speed is determined by the porosity of the perforated sheet. Reached.
すなわち本発明は平均直径が２〜10mmの透孔が
シート全体に均一に分布し、且つ開孔率が20〜50
％である防雪用透孔シートである。 In other words, in the present invention, the pores with an average diameter of 2 to 10 mm are uniformly distributed throughout the sheet, and the porosity is 20 to 50 mm.
% perforated sheet for snow protection.
以下、図面を参照して本発明を説明する。 The present invention will be described below with reference to the drawings.
第１図は透孔２を均一に分布させた透孔シート
１の一実施例である。透孔の形状は第１図では略
菱形であるが、矩形・円形・楕円形・亀甲形でも
よい。透孔シート１の透孔２の平均直径は２〜10
mmである。ここで「平均直径」とは第１図に示す
ように長径ａ及び短径ｂより｛長径ａ＋短径
ｂ｝／２と定義する。又、透孔シート１の透孔２
はシート全体に分布し、且つ開孔率が20〜50％で
あることを必要とする。該透孔シート１の素材と
して合成樹脂・金属・木材等があるが、この中で
合成樹脂製融着網は耐蝕性に富み、又軽量である
ので施工が簡単であり、シーズンオフには撤去し
易すく保管管理もし易すいので好ましい。使用さ
れる合成樹脂には種々のものがあるが、特にポリ
エチレン・ポリ塩化ビニル・ポリプロピレンが好
適である。この合成樹脂製融着網の製法について
は、例えば特公昭34−4185号公報に詳述されてい
る。この他にパンチングボード、あるいは線状体
を編んだ網状物も使用可能である。 FIG. 1 shows an example of a perforated sheet 1 in which perforations 2 are uniformly distributed. Although the shape of the through hole is approximately diamond-shaped in FIG. 1, it may be rectangular, circular, oval, or hexagonal. The average diameter of the pores 2 in the pore sheet 1 is 2 to 10
mm. Here, the "average diameter" is defined as {long diameter a+breadth b}/2 from the long axis a and the short axis b, as shown in FIG. Also, the through holes 2 of the through hole sheet 1
is distributed throughout the sheet and requires an open area ratio of 20 to 50%. Materials for the perforated sheet 1 include synthetic resin, metal, wood, etc. Among these, synthetic resin fused net has excellent corrosion resistance and is lightweight, so it is easy to install and can be removed during the off-season. This is preferable because it is easy to store and manage. There are various synthetic resins that can be used, but polyethylene, polyvinyl chloride, and polypropylene are particularly suitable. The method for manufacturing this synthetic resin fused net is described in detail in, for example, Japanese Patent Publication No. 4185/1985. In addition to this, a punching board or a net-like material made of woven linear bodies can also be used.
上述の透孔シート１を例えばその周縁を縁取り
部材３で挾着固定し、第２図のようにパネル状に
構成し、柱体４に架設して防雪装置５とすること
ができる。 For example, the perforated sheet 1 described above can be fixed at its periphery with a edging member 3, configured into a panel shape as shown in FIG.
上記防雪装置において、たて１ｍ、よこ３ｍの
大きさ、透孔の形状が略菱形で透孔が均一に分布
した種々の透孔シートを第２図のようにパネル状
に構成し、地上から約0.5ｍの間隔をあけ、道路
から風上側約25ｍのところに風向きに対して略垂
直方向に架設し、防雪装置とし、防雪装置の前後
での乱流の生成・消失、風速の減衰並びに防雪装
置の前後の積雪状況から本発明の防雪用透孔シー
トの作用効果を説明する。 In the snow prevention device described above, various perforated sheets with dimensions of 1 m in height and 3 m in width, with approximately diamond-shaped through-holes and evenly distributed through-holes are constructed in a panel shape as shown in Figure 2, and are viewed from the ground. They are installed approximately 25 meters upwind from the road in a direction approximately perpendicular to the wind direction, with an interval of approximately 0.5 m, and are used as snow prevention devices to create and eliminate turbulence before and after the snow prevention device, attenuate wind speed, and prevent snow. The effects of the snow-proof perforated sheet of the present invention will be explained based on snow conditions before and after the device.
第３図は本発明の透孔シートを用いた防雪装置
５で、風速６は防雪装置５の風下側で徐々に減衰
し、防雪装置５と道路８間では約1/5に減衰し、
道路８上では再び上昇し始める。乱流７は防雪装
置５の風上側隣接付近で小さく、又風下直下で大
きく生起し、その直後急激に消失する。その結果
地吹雪によつて運ばれてくる雪は第３図斜線部分
のように防雪装置５の風上側及び防雪装置５と道
路８間に堆積し道路８上への堆積はほとんどな
い。 FIG. 3 shows a snow protection device 5 using the perforated sheet of the present invention, where the wind speed 6 gradually attenuates on the leeward side of the snow protection device 5, and decreases to about 1/5 between the snow protection device 5 and the road 8.
On Road 8 it starts to rise again. The turbulent flow 7 is small near the windward side of the snow protection device 5, and large turbulent flow immediately below the leeward side, and disappears rapidly immediately after that. As a result, the snow carried by the blizzard accumulates on the windward side of the snow protection device 5 and between the snow protection device 5 and the road 8, as shown by the shaded area in FIG. 3, and hardly accumulates on the road 8.
一方、第４図は透孔の平均直径が２mm以下且つ
開孔率が20％以下の透孔シートを用いた防雪装置
５′で、風速６′は防雪装置５′の風下側で急激に
減衰し、防雪装置５′と道路８′間では1/5以下に
減衰し、道路８′上では再び上昇し始める。しか
し乱流７′は防雪装置５′の風上隣接付近で大きく
生起し、風下直下では生起しにくくなる。その結
果地吹雪によつて運ばれてくる雪は防雪装置５′
の風上側で舞い上がり、風下側では舞い上がら
ず、そのため第４図の斜線部分のように防雪装置
５′の風上付近に雪が多く堆積し、次第に防雪装
置５′をおおうほどの大きさになり、吹きだめ式
の防雪装置としての機能維持がなくなつてしま
う。更に透孔が雪に閉塞されることもある。 On the other hand, Figure 4 shows a snow protection device 5' that uses a perforated sheet with an average diameter of 2 mm or less and a porosity of 20% or less, and the wind speed of 6' is rapidly attenuated on the leeward side of the snow protection device 5'. However, between the snow prevention device 5' and the road 8', it attenuates to less than 1/5, and begins to rise again on the road 8'. However, the turbulent flow 7' is largely generated near the windward side of the snow protection device 5', and is less likely to occur immediately below the leeward side. As a result, the snow carried by the blizzard is removed by the snow prevention device 5'.
It flies up on the windward side of the snow and does not fly up on the leeward side, so a lot of snow accumulates around the windward side of the snow protection device 5' as shown in the shaded area in Fig. 4, and gradually becomes large enough to cover the snow protection device 5'. The function of the snowdrift type snow prevention device will no longer be maintained. Additionally, the holes may become blocked by snow.
又、第５図は透孔の平均直径が10mm以上且つ開
孔率が50％以上の透孔シートを用いた防雪装置
５″で、風速６″は防雪装置５″の前後（風上側と
風下側）でほとんど変化せず層流化現象を起こ
す。又、乱流７″は防雪装置５″の前後隣接付近で
小さく生起するだけである。その結果、地吹雪に
よつて運ばれてくる雪は防雪装置５″通過後も地
吹雪とともに移動し、第５図の斜線部分のように
積雪状態になり吹きだめ式の防雪装置としては全
く効果がない。 Figure 5 shows a snow protection device 5'' that uses a perforated sheet with an average diameter of 10 mm or more and a porosity of 50% or more. side), causing a laminar flow phenomenon. In addition, turbulence 7" only occurs to a small extent in the vicinity of the front and back of the snow protection device 5".As a result, the snow carried by the ground blizzard Even after passing through the snow prevention device 5'', the snow continues to move along with the blizzard, resulting in snow accumulation as shown in the shaded area in FIG. 5, which makes it completely ineffective as a snowdrift type snow prevention device.
以上の説明のように本発明の防雪用透孔シート
は吹きだめ式の防雪装置として極めて効果があ
り、更に道路・鉄道線路に沿設しても沿線の景観
も遮断されず有用である。 As described above, the perforated sheet for snow prevention of the present invention is extremely effective as a snowdrift type snow prevention device, and is also useful even when installed along a road or railway line without blocking the scenery along the line.
なお本発明による透孔シートの上述の機能より
容易にわかるように防雪用のみならず防風用にも
使用可能なことはもちろんである。 As can be easily seen from the above-mentioned functions of the perforated sheet according to the present invention, it can of course be used not only for snow protection but also for wind protection.
第１図は本発明の防雪用透孔シートの一実施例
を示す平面図、第２図は本発明の防雪用透孔シー
トを用いた防雪装置の一実施例を示す平面図、第
３図は本発明の透孔シートを用いた防雪装置にお
ける風速、乱流、積雪状況を示す概略図、第４図
及び第５図は本発明以外の透孔シートを用いた防
雪装置における風速、乱流、積雪状況を示す概略
図である。
FIG. 1 is a plan view showing an embodiment of a perforated sheet for snow protection of the present invention, FIG. 2 is a plan view showing an embodiment of a snow protection device using the perforation sheet for snow protection of the present invention, and FIG. is a schematic diagram showing the wind speed, turbulence, and snow conditions in a snow prevention device using a perforated sheet of the present invention, and Figures 4 and 5 are schematic diagrams showing wind speed and turbulence in a snow prevention device using a perforated sheet other than the present invention. , is a schematic diagram showing the snowfall situation.
Claims (1)
一に分布し、且つ開孔率が20〜50％である防雪用
透孔シート。1. A perforated sheet for snow protection in which perforations with an average diameter of 2 to 10 mm are uniformly distributed throughout the sheet, and the porosity is 20 to 50%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15423980A JPS5777704A (en) | 1980-10-31 | 1980-10-31 | Permeation pore sheet for preventing snow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15423980A JPS5777704A (en) | 1980-10-31 | 1980-10-31 | Permeation pore sheet for preventing snow |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5777704A JPS5777704A (en) | 1982-05-15 |
| JPS6321761B2 true JPS6321761B2 (en) | 1988-05-09 |
Family
ID=15579877
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15423980A Granted JPS5777704A (en) | 1980-10-31 | 1980-10-31 | Permeation pore sheet for preventing snow |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5777704A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6145413U (en) * | 1984-08-27 | 1986-03-26 | 日本鋼管株式会社 | windbreak board |
| JP2010216095A (en) * | 2009-03-13 | 2010-09-30 | Sekisui Jushi Co Ltd | Protective fence against wind and snow |
| JP5683151B2 (en) * | 2010-04-13 | 2015-03-11 | Ｊｆｅシビル株式会社 | Dust-proof net and dust-proof fence using the same |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4219842Y1 (en) * | 1964-07-13 | 1967-11-17 |
-
1980
- 1980-10-31 JP JP15423980A patent/JPS5777704A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4219842Y1 (en) * | 1964-07-13 | 1967-11-17 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5777704A (en) | 1982-05-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101915694B1 (en) | Fine particle collected device | |
| US20070295652A1 (en) | Inlet filter for storm drain | |
| US4089179A (en) | Shoreline erosion control | |
| KR101802214B1 (en) | Fog removal apparatus and multipurpose fog removal system including the same | |
| DE2609726A1 (en) | ROAD VISIBILITY | |
| JPS6321761B2 (en) | ||
| CN207525851U (en) | Side slope rain water collecting system | |
| DE202017107068U1 (en) | Aspirator and range of motion with aspirator | |
| JPS59118905A (en) | Shield apparatus for reducing wind velocity | |
| EP2055838A1 (en) | Sound barriers | |
| KR102675043B1 (en) | Intelligent fog removal apparatus and control method thereof | |
| US9435093B2 (en) | Engineered roughness elements, arrays thereof, and their method of use | |
| WO2014003631A1 (en) | Drift shield | |
| DE2616778A1 (en) | Roadside noise and dazzle screen wall - has pendulum hung absorbing elements opening in strong winds and has vertical stops | |
| CH645422A5 (en) | Absorbing noise-protection wall | |
| JP2007120091A (en) | Snow fence | |
| JP5610251B1 (en) | Roadside snow fence | |
| CN206467633U (en) | A kind of check dam mechanism | |
| JP3486365B2 (en) | Louver unit for vehicle running path | |
| JP2005290911A (en) | Snow protection fence | |
| CN209603266U (en) | A kind of lower well double-edged fine-toothed comb of municipal administration | |
| CN207828812U (en) | Vehicle deceleration strip | |
| JP2003076372A (en) | Sound absorbing panel | |
| JP3097796U (en) | Snow fence with air conditioner | |
| SU1707128A1 (en) | Water intake fish conservation work |