JP4115418B2 - Protective fence - Google Patents

Protective fence Download PDF

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JP4115418B2
JP4115418B2 JP2004096780A JP2004096780A JP4115418B2 JP 4115418 B2 JP4115418 B2 JP 4115418B2 JP 2004096780 A JP2004096780 A JP 2004096780A JP 2004096780 A JP2004096780 A JP 2004096780A JP 4115418 B2 JP4115418 B2 JP 4115418B2
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rope
shock absorber
struts
tension
strut
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JP2005282105A (en
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細川  豊
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細川 豊
和光物産株式会社
開発コンクリート株式会社
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Description

本発明は、山腹の斜面部等に構築し、積雪や落石等を受け止めて道路等への落下、流入するのを防止する防護柵に関する。   The present invention relates to a protective fence that is constructed on a slope portion of a mountainside, etc., and receives snow and rocks to prevent it from falling or flowing into a road or the like.

従来から山腹の斜面部等に構築して落石や積雪等を受け止めて道路等への落下、流入を防止する防護柵が知られており、例えば、山腹の斜面部に間隔を置いて縦孔を穿孔し、この縦孔に建て込んだパイプ支柱を並設すると共に、これら各パイプ支柱に複数段のケーブルとともに金網を張設した落石等の防護柵(例えば特許文献1)が提案されている。   Conventionally, protective fences have been known that are constructed on slopes of mountainsides to prevent falling or inflowing on roads etc. by receiving falling rocks and snow, etc.For example, vertical holes are provided at intervals on slopes of mountainsides. There has been proposed a protective fence such as a rock fall (for example, Patent Document 1) in which pipe struts that are drilled and built in the vertical holes are arranged side by side, and a wire mesh is stretched along with a plurality of cables on each of the pipe struts.

この防護柵は、両端部に配置された端末パイプ支柱にケーブルを通すための複数のケーブル装着孔が間隔をおいて形成され、中間部に配置される中間パイプ支柱には前記ケーブル装着孔と対応してケーブルを固定するためのボルトが形成されている。そして、ケーブル装着孔に緊張機能を備えた末端金具を装着し、この末端金具にケーブルの両端を連結した後、各中間パイプ支柱に形成するボルトに固定プレートをナット止めし、この固定プレートによって各中間パイプ支柱に架け渡したケーブルを固定すると共に、各パイプ支柱に金網を固定している。   This guard fence is formed with a plurality of cable mounting holes for passing cables through the end pipe struts arranged at both ends, and the intermediate pipe struts arranged in the middle part correspond to the cable mounting holes Thus, a bolt for fixing the cable is formed. Then, after attaching the end fitting with a tension function to the cable attachment hole and connecting both ends of the cable to this end fitting, the fixing plate is nut-fastened to the bolt formed on each intermediate pipe post, In addition to fixing the cables that span the intermediate pipe struts, a wire mesh is secured to each pipe strut.

このような防護柵は、落石や積雪等を各パイプ支柱に張り巡らした金網と、これを支持するケーブルで受け止めるものであるが、金網を支えるパイプ支柱が複数のケーブルで連結されているだけなので、複数のパイプ支柱相互の連結強度が弱く、一部の中間パイプに落石や積雪等などの衝撃が加わると、その中間パイプが損壊する虞れがある。さらに、各中間パイプ支柱に架設したケーブルについても、その固定部分が中間パイプ支柱のみであるから、一部のケーブルに強い衝撃を加わった場合、そのケーブルに強い引張力が作用して切断する虞れもあるから、金網及びケーブルの張設耐力が弱いという課題を有している。また、パイプ支柱に張設したケーブルや金網は部分的に損傷した場合でも張設耐力が著しく低下するが、前記従来の防護柵は、ケーブル及び金網が防護柵の全長に渡って連続することから、ケーブル及び金網を部分的に交換することができず、メンテナンス作業が面倒であると共に、コスト的にも不経済であった。   Such a guard fence is to catch the falling rock, snow, etc. on each pipe column and the cable that supports it, but the pipe column that supports the mesh is only connected by multiple cables. The connection strength between the plurality of pipe struts is weak, and if an impact such as falling rocks or snow is applied to some intermediate pipes, the intermediate pipes may be damaged. Furthermore, the cables erected on each intermediate pipe strut are also fixed only to the intermediate pipe strut, so if a strong impact is applied to some cables, there is a risk that the cable will be cut due to a strong tensile force. Therefore, there is a problem that the tension strength of the wire mesh and the cable is weak. Also, even if the cable or wire mesh stretched on the pipe strut is partially damaged, the laying strength is significantly reduced. However, the conventional guard fence has a continuous cable and wire mesh over the entire length of the guard fence. The cable and the wire mesh could not be partially exchanged, and the maintenance work was troublesome, and the cost was uneconomical.

一方、落石などの衝撃を摩擦エネルギーに変換して吸収するものとして、所定の間隔で支柱を設け、各支柱の間に水平ロープ材を水平方向のスライドを許容した状態で係留し、水平ロープ材の両端は固定し、各支柱間を水平ロープ材に掛止させたワイヤ製のネットで遮蔽し、前記水平ロープ材の途上にロープ材を重合させて形成した余長部と、余長部を一定の力で挟持する挟持具とにより、水平ロープ材に設定張力以上の張力が作用したとき、水平ロープ材が一定の摩擦力を保持したまま余長部が伸長して張力を吸収する緩衝部を形成した衝撃吸収柵(例えば特許文献2、特許文献3)が提案されている。   On the other hand, as a means to absorb impacts such as falling rocks by converting them into frictional energy, support columns are provided at predetermined intervals, and horizontal rope materials are moored in a state that allows horizontal sliding between each support column. Both ends of the cable are fixed, shielded between wires by a wire net hooked on a horizontal rope material, and an extra length portion formed by polymerizing the rope material in the middle of the horizontal rope material, and an extra length portion. A buffer that absorbs tension by extending the extra length of the horizontal rope material while maintaining a constant frictional force when a tension higher than the set tension is applied to the horizontal rope material due to the clamping device that clamps with a constant force A shock absorbing fence (for example, Patent Document 2 and Patent Document 3) in which is formed is proposed.

上記衝撃吸収柵では、衝撃を支柱に伝える前に水平ロープ材の一部に形成した緩衝部の摺動により衝撃を吸収することができ、従来に比較して支柱の荷重負担を著しく軽減することができる。
特開平7−197423号公報 特開平6−173221号公報 特開平6−336709号公報(段落0013段)
The shock absorber fence can absorb the shock by sliding the buffer part formed in a part of the horizontal rope material before transmitting the shock to the column, and remarkably reduce the load load of the column compared to the conventional. Can do.
JP-A-7-197423 JP-A-6-173221 JP-A-6-336709 (paragraph 0013)

ところで、落石は、支柱間のみならず、支柱に直接衝突する場合がある。そして、従来の衝撃柵において、支柱に落石が衝突すると、支柱に倒れに対応して支柱に張力が発生し、これにより水平ロープ材が摺動するから、その摺動量が少なく、摩擦力による衝撃吸収効果が十分に得にくい面がある。   By the way, falling rocks may collide not only between the columns but also directly on the columns. In the conventional impact fence, when a falling rock collides with the support, tension is generated in the support in response to the fall of the support, and this causes the horizontal rope material to slide. There are aspects where it is difficult to obtain sufficient absorption effect.

さらに、上記衝撃柵(例えば特許文献3)では、横ワイヤーロープに設定値以上の張力が作用すると、横ワイヤーロープが支柱把持具に対して滑り、摩擦抵抗により衝撃エネルギーを吸収するが、摩擦抵抗は、摺動前の静止摩擦係数と摺動時の動摩擦係数に基くものであるから、摺動を開始すると、動摩擦係数に対応したエネルギー吸収がなされるため、静止摩擦係数に基くエネルギー吸収が十分に活用されていない面がある。
そして、また、両衝撃吸収柵とも、また、大きな衝撃力に対して複数の支柱の変形による吸収効果が得られにくい面がある。
Furthermore, in the said impact fence (for example, patent document 3), when the tension | tensile_strength more than a setting value acts on a horizontal wire rope, a horizontal wire rope will slide with respect to a support | pillar gripper, and will absorb impact energy by friction resistance, but friction resistance Is based on the static friction coefficient before sliding and the dynamic friction coefficient at the time of sliding, so when starting to slide, the energy absorption corresponding to the dynamic friction coefficient is made, so the energy absorption based on the static friction coefficient is sufficient. There are aspects that are not being used.
Moreover, both the shock absorbing fences also have a surface in which it is difficult to obtain an absorption effect due to the deformation of the plurality of support columns with respect to a large impact force.

そこで、本発明は、索条体の摺動により衝撃エネルギーを効率よく吸収することができ、かつ支柱の変形により衝撃エネルギーを吸収することができる防護柵を提供することを目的とする。   Then, an object of this invention is to provide the protective fence which can absorb impact energy efficiently by sliding of a rope body, and can absorb impact energy by deformation | transformation of a support | pillar.

請求項1の発明は、間隔を置いて支柱を立設し、これら支柱の間に上下に間隔をおいて索状体を架設した防護柵において、2本の前記索条体の一端側を所定の摩擦力で把持すると共に、前記索条体に所定以上の張力が作用したとき該索条体の摺動を許容することにより衝撃を吸収する緩衝具を中間の前記支柱に設け、この中間の支柱の両側の支柱に前記2本の索条体の他端側をそれぞれ取り付け、前記2本の索条体の一端側に、前記中間の支柱に前記張力を伝えるストッパを設け、前記ストッパと前記緩衝具との間に、前記索条体の一端側を所定の摩擦力で把持すると共に、前記索条体に所定以上の張力が作用したとき該索条体の摺動を許容することにより衝撃を吸収する中間緩衝具を設け、前記索条体に所定以上の張力が作用したとき該索条体が前記支柱に取り付けた緩衝具に対して摺動し、この支柱の緩衝具側に前記中間緩衝具が接触し、両緩衝具に対して索条体が摺動するように構成したものである。 According to the first aspect of the present invention, in a guard fence in which struts are erected at intervals and a rope-like body is erected between the struts in the vertical direction, one end side of the two striated bodies is predetermined. A shock absorber that absorbs an impact by allowing sliding of the cable body when a predetermined tension or more is applied to the cable body is provided in the intermediate strut. mounting post on either side of the strut to the two rope body at the other end, respectively, at one end of the two rope body is provided with a stopper for transmitting the tension to the intermediate posts, the said stopper By holding the one end side of the strip body with a predetermined frictional force between the shock absorber, and by allowing the strand body to slide when a predetermined tension or more is applied to the strip body, an impact is achieved. An intermediate buffer is provided to absorb the cable, and when the predetermined tension is applied to the cable body, the cable That the body slides against the bumper attached to said post, and said contact middle bumper is the bumper side of the pillar, rope body is configured to slide relative to both bumper It is.

また、請求項の発明は、前記2本の索条体の他端側をそれぞれ揺動可能に取り付けたものである。 In the invention of claim 2 , the other end sides of the two cords are attached so as to be swingable.

請求項1の構成によれば、落石などの衝撃力により索条体に所定以上の張力が作用すると、支柱に設けた緩衝具に対して、索条体が摺動し、この摺動による摩擦エネルギーにより前記衝撃力を吸収する。索条体の摺動が終わり、ストッパにより中間の支柱に張力が加わると、この中間の支柱と両側の支柱とが一体的になって支柱の変形により前記衝撃力を吸収する。   According to the configuration of claim 1, when a predetermined tension or more acts on the rope body due to an impact force such as falling rocks, the rope body slides against the buffer provided on the support column, and friction caused by this sliding is caused. The impact force is absorbed by energy. When the sliding of the rope is finished and tension is applied to the intermediate strut by the stopper, the intermediate strut and the struts on both sides are integrated to absorb the impact force by deformation of the strut.

また、請求項の構成によれば、落石などの衝撃力により索条体に所定以上の張力が作用すると、支柱に設けた緩衝具に対して、索条体が摺動し、索条体と共に中間緩衝具がスライドし、該中間緩衝具が支柱の緩衝具に衝突した後、索条体は中間緩衝具と支柱の把持具に対して摺動して衝撃力を吸収する。この場合、支柱に設けた緩衝具に対して摺動を開始する際及び中間緩衝具に対して摺動を開始する際、それぞれの静止摩擦係数に対応したエネルギー吸収が行われる。 Moreover, according to the structure of Claim 1 , when tension more than predetermined acts on a rope body by impact force, such as falling rock, a rope body slides with respect to the buffer provided in the support | pillar, and a rope body At the same time, after the intermediate shock absorber slides and the intermediate shock absorber collides with the shock absorber of the support column, the striation body slides against the intermediate shock absorber and the grip device of the support column to absorb the impact force. In this case, when starting sliding with respect to the shock absorber provided on the support column and when starting sliding with respect to the intermediate shock absorber, energy absorption corresponding to each coefficient of static friction is performed.

また、請求項の構成によれば、前面に落石などを受け、索条体が落石箇所を中心に後に移動し、架設方向に対して後側に索条体の向きが変わるが、両側の支柱に対して索条体の他端側が揺動可能に連結されているため、向きが変っても索条体の他端側に無理な力が加わることがない。 Further, according to the configuration of claim 2, receiving the like falling rocks in front, and moved after about the rope body falling rock point, varies the direction of the rope member to the rear side of the erection direction, on both sides of the Since the other end side of the rope body is connected to the column so as to be able to swing, no excessive force is applied to the other end side of the rope body even if the orientation changes.

また、請求項の構成によれば、支柱に取り付ける緩衝具と、中間緩衝具との組み合わせにより、衝撃力を効率よく吸収することができる。 Further, according to the first aspect, a bumper to be attached to the strut, in combination with an intermediate bumper, it is possible to absorb the impact force effectively.

本発明における好適な実施の形態について、添付図面を参照しながら詳細に説明する。なお、以下に説明する実施の形態は、特許請求の範囲に記載された本発明の内容を限定するものではない。また、以下に説明される構成の全てが、本発明の必須要件であるとは限らない。各実施例では、従来とは異なる衝撃吸収柵である防護柵を採用することにより、従来にない防護柵が得られ、その防護柵を夫々記述する。   Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The embodiments described below do not limit the contents of the present invention described in the claims. In addition, all of the configurations described below are not necessarily essential requirements of the present invention. In each embodiment, by using a protective fence that is a shock absorbing fence different from the conventional one, an unprecedented protective fence is obtained, and each of the protective fences is described.

以下、本発明の防護柵の実施例1について図1〜図7を参照して説明する。防護柵1は、両側に配置する端末パイプ支柱2の間に中間パイプ支柱3を間隔をおいて並設し、これらパイプ支柱2,3,2に上下に間隔おいて索状体としてのロープ材4,4´を多段に架設すると共に、防護用網体として金属線材で編成した金網5を張設し、例えば、山腹の斜面部にコンクリート基礎7を設け、このコンクリート基礎7に構築して積雪や落石等を受け止めものである。   Hereinafter, Embodiment 1 of the guard fence of the present invention will be described with reference to FIGS. The protective fence 1 has intermediate pipe struts 3 arranged at intervals between terminal pipe struts 2 arranged on both sides, and a rope member as a cord-like body spaced vertically on these pipe struts 2, 3, 2. 4 and 4 'are installed in multiple stages, and a wire mesh 5 knitted with a metal wire is stretched as a protective mesh body. For example, a concrete foundation 7 is provided on a slope of a mountainside, and the concrete foundation 7 is constructed to provide snow. It is intended to accept or fall rocks.

前記端末パイプ支柱2と中間パイプ支柱3は、コンクリートなどの基礎7に建て込まれる。これら端末パイプ支柱2と中間パイプ支柱3は、断面形状が円形の鋼管によって形成されている。また、端末パイプ支柱2と中間パイプ支柱3及び連結杆6は、断面形状が円形の鋼管によって形成されている。前記連結杆6は断面円形をなし、その連結杆6の端部を端末パイプ支柱2及び中間パイプ支柱3に回動連結機構8により前後方向及び上下方向回動可能に連結している。   The terminal pipe strut 2 and the intermediate pipe strut 3 are built on a foundation 7 such as concrete. These end pipe struts 2 and intermediate pipe struts 3 are formed of steel pipes having a circular cross-sectional shape. Moreover, the terminal pipe support | pillar 2, the intermediate | middle pipe support | pillar 3, and the connecting rod 6 are formed of the steel pipe with a circular cross-sectional shape. The connecting rod 6 has a circular cross section, and ends of the connecting rod 6 are connected to the terminal pipe column 2 and the intermediate pipe column 3 so as to be pivotable in the front-rear direction and the vertical direction by the pivot coupling mechanism 8.

この例では、3本の支柱2,3,2を1組のユニットとした2スパンの構造を示し、1組のユニットにおいて、各段において、2本のロープ材4,4´を用いる。中間パイプ支柱3には、2本のロープ材4,4´の一端側4A,4A´を所定の摩擦力で把持する緩衝具11が設けられている。この緩衝具11は、左右方向に長略箱状をなし、ほぼ水平方向の前記ロープ材4,4´を把持する把持溝12,12を備える。   This example shows a two-span structure in which three struts 2, 3 and 2 are a set of units, and two rope members 4 and 4 'are used at each stage in the set of units. The intermediate pipe support 3 is provided with a shock absorber 11 for gripping one end side 4A, 4A 'of the two rope members 4, 4' with a predetermined frictional force. The shock absorber 11 has a substantially box shape in the left-right direction, and includes gripping grooves 12 and 12 for gripping the rope members 4 and 4 ′ in the substantially horizontal direction.

前記緩衝具11は蓋体16を備え、また、前記緩衝具11の後面には、支柱3の外周に係合する係合凹部17が形成され、この係合凹部17は支柱3を中心とした円弧状をなす。そして、緩衝具11の前面に前記蓋体16を被せ、支柱3に外装した上下のUボルト18の端部を、緩衝具11の上下左右及び前記蓋体16に挿通し、該端部にナット19を螺合することにより、支柱3に緩衝具11を固定する。尚、前記ナット19の締付力により前記把持溝12,12にロープ材4,4´を把持するようにしてもよいし、図示しない別個の締付手段により把持するようにしてもよく、緩衝具11は、2本のロープ材4,4´の一端側4A,4A´を所定の摩擦力で把持すると共に、ロープ材4,4´に所定以上の張力が作用したとき該ロープ材4,4´の摺動を許容することにより衝撃を吸収するものである。   The shock absorber 11 includes a lid 16, and an engagement recess 17 that engages with the outer periphery of the column 3 is formed on the rear surface of the buffer 11. The engagement recess 17 is centered on the column 3. It has an arc shape. Then, the end of the upper and lower U-bolts 18 covered with the lid 16 is put on the front surface of the shock absorber 11, and the upper and lower left and right sides of the shock absorber 11 and the lid 16 are inserted, and a nut is inserted into the end. The shock absorber 11 is fixed to the column 3 by screwing 19. The rope members 4 and 4 'may be gripped in the gripping grooves 12 and 12 by the tightening force of the nut 19, or may be gripped by a separate tightening means (not shown). The tool 11 grips the one end sides 4A and 4A 'of the two rope members 4 and 4' with a predetermined frictional force, and the rope member 4 and 4 'when a predetermined tension or more is applied to the rope members 4 and 4'. The shock is absorbed by allowing 4 'sliding.

前記ロープ材4の他端側4Bを一方の隣の支柱2に取り付け、前記一端側4Aを緩衝具11により所定の摩擦力で把持し、その一端にストッパー22を設ける。また、他のロープ材4´の他端側4B´を他方の隣の支柱2に取り付け、その一端側4A´を前記ロープ材4の一端側4Aと重ね合わせると共に、前記緩衝具11により所定の摩擦力で把持し、その一端にストッパー22を設ける。   The other end side 4B of the rope member 4 is attached to one of the adjacent struts 2, the one end side 4A is gripped with a predetermined frictional force by the shock absorber 11, and a stopper 22 is provided at one end thereof. Further, the other end 4B 'of the other rope member 4' is attached to the other adjacent support column 2, and its one end side 4A 'is overlapped with the one end side 4A of the rope member 4, and a predetermined amount is given by the buffer 11 Gripping with frictional force, a stopper 22 is provided at one end.

前記緩衝具11とロープ材4の一端側4Aのストッパ22との間に中間緩衝具22を配置し、この中間緩衝具22は前記一端側4Aを所定の摩擦力で把持すると共に、ロープ材4に所定以上の張力が作用したとき該ロープ材4の摺動を許容することにより衝撃を吸収するものであり、前記中間緩衝具22には、ほぼ平行に配置された前記ロープ材4´の一端側4A´を遊挿する挿通部たる挿通孔24Aを有する。   An intermediate shock absorber 22 is disposed between the shock absorber 11 and the stopper 22 on one end side 4A of the rope material 4. The intermediate shock absorber 22 grips the one end side 4A with a predetermined frictional force, and the rope material 4 When a tension of a predetermined level or more is applied to the rope, the rope material 4 is allowed to slide to absorb an impact, and the intermediate shock absorber 22 has one end of the rope material 4 'arranged substantially in parallel. It has an insertion hole 24A which is an insertion part for loosely inserting the side 4A '.

前記緩衝具11とロープ材4´の一端側4A´のストッパ22との間に中間緩衝具22を配置し、この中間緩衝具22は前記一端側4A´を所定の摩擦力で把持すると共に、ロープ材4´に所定以上の張力が作用したときロープ材4´の摺動を許容することにより衝撃を吸収するものであり、前記中間緩衝具22には、ほぼ平行に配置された前記ロープ材4の一端側4Aを遊挿する挿通孔24Aを有する。   An intermediate shock absorber 22 is arranged between the shock absorber 11 and the stopper 22 on one end side 4A 'of the rope member 4'. The intermediate shock absorber 22 grips the one end side 4A 'with a predetermined frictional force, The rope material 4 ′ absorbs an impact by allowing the rope material 4 ′ to slide when a predetermined tension or more acts on the rope material 4 ′, and the intermediate shock absorber 22 has the rope material arranged substantially in parallel. 4 has an insertion hole 24A for loosely inserting one end side 4A thereof.

前記緩衝具21は、二つ割りした本体23,23に圧接溝24,24を形成し、この圧接溝24,24間に前記ロープ材4,4´を配置し、前記本体23,23同士をボルトなどの締付手段25により締め付けて前記ロープ材4,4´を所定の摩擦力で把持し、一方、二つ割りした本体23,23を締付組立てした状態で、ロープ材4´,4を遊挿する挿通部たる前記挿通孔24Aが形成される。   In the shock absorber 21, pressure-contact grooves 24, 24 are formed in two divided main bodies 23, 23, the rope members 4, 4 'are arranged between the pressure-contact grooves 24, 24, and the main bodies 23, 23 are connected to each other by bolts or the like. The rope members 4 and 4 'are gripped with a predetermined friction force by being tightened by the tightening means 25, and the rope members 4' and 4 are loosely inserted in a state where the divided main bodies 23 and 23 are tightened and assembled. The insertion hole 24A which is an insertion part is formed.

さらに、端末パイプ支柱2と外周には、ロープ材取付手段が設けられ、この取付手段の取付プレート31が、ケーブル4の本数に対応して固定されている。この取付プレート31には、ロープ材4の末端金具32を取り付けるための孔33が形成される。尚、取付プレート31には、2本の端末金具32を孔33に掛け止めすることができる。そして、ロープ材取付手段はロープ材4,4´の端部を揺動可能に支柱2に取り付け、かつロープ材4,4´の長さ方向の移動を規制した状態で取り付けるものである。   Further, rope material attaching means is provided on the terminal pipe strut 2 and the outer periphery, and attachment plates 31 of the attaching means are fixed corresponding to the number of cables 4. A hole 33 for attaching the end fitting 32 of the rope member 4 is formed in the attachment plate 31. Note that two end fittings 32 can be hooked on the holes 33 on the mounting plate 31. The rope material attaching means attaches the end portions of the rope materials 4 and 4 'to the support column 2 so as to be swingable, and attaches the rope materials 4 and 4' in a state in which movement of the rope materials 4 and 4 'is restricted.

前記末端金具32はU字状のジョイント金具34と、このジョイント金具34にナット35によって固定されるプレート36とで構成され、プレート36には前記ジョイント金具34の基部に形成するねじ部34Aを挿通する一対の孔37と、この各孔37,37の間に位置して前記ロープ材4を通す挿通孔38が形成されている。この挿通孔38は、前記ロープ材4,4´の末端に固着されるストッパ22より径小に形成されており、該ストッパ22を抜け止めするようにしている。   The end fitting 32 is composed of a U-shaped joint fitting 34 and a plate 36 fixed to the joint fitting 34 with a nut 35. The plate 36 is inserted with a threaded portion 34A formed at the base of the joint fitting 34. A pair of holes 37 are formed, and an insertion hole 38 through which the rope material 4 is passed is formed between the holes 37 and 37. The insertion hole 38 is formed with a smaller diameter than the stopper 22 fixed to the ends of the rope members 4 and 4 ′ so as to prevent the stopper 22 from coming off.

以上のように構成される防護柵1の施工方法について説明する。防護柵1は、例えば山腹の斜面部に設置するものであって、コンクリート基礎7を構築すると共に、該コンクリート基礎7に各パイプ支柱2,3を建て込む。こうして建て込まれた各パイプ支柱2,3,2は、防護柵1の両側に配置される端末パイプ支柱2と、これら端末パイプ支柱2間の中間支柱3とが一直線状に配置される。そして、各パイプ支柱2,3,2の間にロープ材4,4´を架設する。すなわち、各パイプ支柱2,2に固定した取付プレート31に形成する孔33にジョイント金具34を通すと共に、プレート36に形成する挿通孔38のロープ材4の両端を通してロープ材4の端部にストッパ22を固定する。この後、ジョイント金具34の両ねじ部34Aをプレート36の孔37を通してねじ部34にナット35を締め付けることによって各パイプ支柱2,3,2の間に配置したロープ材4を緊張させる。こうして各パイプ支柱2,3,2の間にロープ材4,4´を架設した後、各パイプ支柱2,3,2とロープ材4に固定金具(図示せず)によって金網5を取り付ける。なお、図1中両側の支柱2,2の隣には、それぞれ図示しない支柱3と支柱2が同様に配置され、これらにより1組のユニットが形成され、支柱3,3の間の支柱2には2つの端末金具32が設けられる。   The construction method of the guard fence 1 comprised as mentioned above is demonstrated. The protective fence 1 is installed on, for example, a slope of a mountainside, and constructs a concrete foundation 7 and embeds each pipe support 2 and 3 in the concrete foundation 7. In each of the pipe struts 2, 3, 2 built in this way, a terminal pipe strut 2 disposed on both sides of the protective fence 1 and an intermediate strut 3 between these terminal pipe struts 2 are disposed in a straight line. And rope material 4,4 'is constructed between each pipe support | pillar 2,3,2. That is, the joint fitting 34 is passed through the hole 33 formed in the mounting plate 31 fixed to each pipe support 2, 2, and the stopper is provided at the end of the rope member 4 through both ends of the rope member 4 of the insertion hole 38 formed in the plate 36. Fix 22 Thereafter, the rope member 4 disposed between the pipe struts 2, 3, 2 is tensioned by tightening the nut 35 to the screw portion 34 through the holes 37 of the plate 36 through the screw portions 34 A of the joint fitting 34. After the rope members 4, 4 ′ are thus installed between the pipe struts 2, 3, 2, the wire mesh 5 is attached to the pipe struts 2, 3, 2 and the rope member 4 by fixing brackets (not shown). In addition, the column 3 and the column 2 (not shown) are arranged in the same manner next to the columns 2 and 2 on both sides in FIG. 1, thereby forming one set of units, and the column 2 between the columns 3 and 3. Two terminal fittings 32 are provided.

次に、前記構成につき、その作用を説明すると、支柱2,3,2間において、金網5に落石を受け、該落石の衝撃力によりロープ材4,4´に所定以上の張力が作用すると、緩衝具21に対して、ロープ材4が摺動し、この摺動による摩擦エネルギーにより衝撃力を吸収する。一例を図7を用いて説明すると、右側の支柱2,3間に落石を受け(図7(A))、ロープ材4に所定以上の張力が発生すると、支柱3の緩衝具11に対してロープ材4の一端側4Aが摺動し、一端側4Aを所定の摩擦力で把持した中間緩衝具21は、他方のロープ材4´に沿って移動し、支柱3の緩衝具11又は支柱3に突き当たる(図7(B))。すると、ロープ材4が緩衝具11に突き当たった中間緩衝具21と緩衝具11に対して摺動し、ストッパ22が中間緩衝具21に突き当たるまでロープ材4が摺動する。このようにロープ材4が支柱3の緩衝具11に対して摺動を開始した後、続いて中間緩衝具21に対して摺動するから、動摩擦によるエネルギー吸収以外にも、摺動開始時の静止摩擦係数に対応したエネルギー吸収効果が得られる。   Next, the operation of the above structure will be described. When a falling rock is received by the wire mesh 5 between the support columns 2, 3 and 2, and a tension of a predetermined level or more acts on the rope members 4 and 4 ′ by the impact force of the falling rock, The rope material 4 slides with respect to the buffer 21 and the impact force is absorbed by the frictional energy generated by the sliding. An example will be described with reference to FIG. 7. When a falling rock is received between the right struts 2 and 3 (FIG. 7A) and a tension exceeding a predetermined value is generated on the rope member 4, The intermediate shock absorber 21 that the one end side 4A of the rope material 4 slides and grips the one end side 4A with a predetermined frictional force moves along the other rope material 4 ', and the shock absorber 11 of the support column 3 or the support column 3 (FIG. 7B). Then, the rope material 4 slides with respect to the intermediate shock absorber 21 and the shock absorber 11 that have hit the shock absorber 11, and the rope material 4 slides until the stopper 22 hits the intermediate shock absorber 21. Thus, since the rope member 4 starts to slide with respect to the buffer 11 of the support column 3 and then slides with respect to the intermediate buffer 21, in addition to energy absorption by dynamic friction, Energy absorption effect corresponding to the coefficient of static friction can be obtained.

そして、図7(C)に示すように、ストッパ22が中間緩衝具21に突き当たると、ロープ材4とこれを挟む支柱2,3が一体となり、支柱2,3が曲がる倒れる等の変形を起こして落石などの衝撃力を吸収する。   Then, as shown in FIG. 7C, when the stopper 22 hits the intermediate shock absorber 21, the rope material 4 and the struts 2 and 3 sandwiching the rope member 4 are integrated, and the struts 2 and 3 are bent and fallen down. Absorb impact force such as falling rocks.

また、支柱3に落石を受け、該支柱3が倒れる変形を起し、ロープ材4,4´がスライドし、支柱2の緩衝具11に両側の中間緩衝具21,21が突き当たり、これら中間緩衝具21,21にストッパ22,22が突き当たると、それらロープ材4,4´により、3本1組の支柱2,3,2が一体化され、この後、両側の支柱2,2の変形などにより衝撃力を効率よく吸収することができる。   In addition, the support 3 receives a fallen rock, causes the support 3 to fall down, the rope members 4 and 4 'slide, the intermediate shock absorbers 21 and 21 on both sides hit the shock absorber 11 of the support 2, and these intermediate shock absorbers. When the stoppers 22, 22 abut against the tools 21, 21, the rope members 4, 4 ′ unite three sets of struts 2, 3, 2, and then deform the struts 2, 2 on both sides, etc. Thus, the impact force can be absorbed efficiently.

また、同様に、支柱2に落石を受け、該支柱2が倒れる変形を起し、ロープ材4,4´がスライドし、一方及び他方に隣接する支柱3,3の緩衝具11に中間緩衝具21が突き当たり、これら中間緩衝具21にストッパ22が突き当たると、それらロープ材4,4´により、3本1組の支柱3,2,3が一体化され、この後、両側の支柱3,3の変形などにより衝撃力を効率よく吸収することができる。   Similarly, the support column 2 receives a falling rock, causes the support column 2 to fall, and the rope members 4 and 4 ′ slide, and the intermediate buffer device is placed on the buffer device 11 of the support columns 3 and 3 adjacent to one and the other. When 21 hits and the stopper 22 comes into contact with these intermediate shock absorbers 21, the rope members 4, 4 'unite the three sets of support columns 3, 2, 3 and then the support columns 3, 3 on both sides. The impact force can be efficiently absorbed by deformation of the material.

このように本実施例では、請求項1に対応して、間隔を置いて支柱2,3,2を立設し、これら支柱2,3,2の間に上下に間隔をおいて索状体たるロープ材4,4´を架設した防護柵において、2本のロープ材4,4´を所定の摩擦力で把持すると共に、ロープ材4,4´に所定以上の張力が作用したとき該ロープ材4,4´の摺動を許容することにより衝撃を吸収する緩衝具21を中間の支柱3に設け、この中間の支柱3の両側の支柱2,2に2本のロープ材4,4´の他端側4B,4B´をそれぞれ取り付け、2本のロープ材4,4´の一端側4A,4A´に、中間の支柱3に張力を伝えるストッパ22を設けたから、落石などの衝撃力によりロープ材4,4´に所定以上の張力が作用すると、支柱3に設けた緩衝具11に対して、ロープ材4,4´が摺動し、この摺動による摩擦エネルギーにより衝撃力を吸収する。ロープ材4,4´の摺動が終わり、ストッパ22により中間の支柱3に張力が加わると、この中間の支柱3と両側の支柱2,2とが一体的になって支柱2,3,3の変形により衝撃力を吸収することができる。   Thus, in this embodiment, corresponding to claim 1, the support columns 2, 3 and 2 are erected at intervals, and the cord-like bodies are spaced vertically between these support columns 2, 3 and 2 In the protective fence on which the rope members 4 and 4 'are installed, the two rope members 4 and 4' are gripped with a predetermined frictional force, and the rope members 4 and 4 'are subjected to a tension higher than a predetermined level. A shock absorber 21 that absorbs an impact by allowing sliding of the materials 4 and 4 ′ is provided on the intermediate column 3, and two rope members 4 and 4 ′ are provided on the columns 2 and 2 on both sides of the intermediate column 3. The other end sides 4B and 4B 'are respectively attached to the one end sides 4A and 4A' of the two rope members 4 and 4 ', and the stopper 22 for transmitting the tension to the intermediate strut 3 is provided. When a predetermined tension or more is applied to the rope members 4, 4 ′, the rope members 4, 4 ′ are applied to the shock absorber 11 provided on the column 3. Slide and to absorb the impact force by frictional energy by the slide. When the sliding of the rope members 4 and 4 ′ is finished and the tension is applied to the intermediate strut 3 by the stopper 22, the intermediate strut 3 and the struts 2 and 2 on both sides are integrated to form the struts 2, 3 and 3. The impact force can be absorbed by the deformation of.

また、このように本実施例では、請求項に対応して、ストッパ22と緩衝具11との間に、ロープ材4,4´の一端側4A,4A´を所定の摩擦力で把持すると共に、ロープ材4,4´に所定以上の張力が作用したとき該ロープ材4,4´の摺動を許容することにより衝撃を吸収する中間緩衝具21,21を設けたから、落石などの衝撃力によりロープ材4,4´に所定以上の張力が作用すると、支柱3に設けた支柱の緩衝具3に対して、ロープ材4,4´が摺動し、ロープ材4,4´と共に中間緩衝具21,21がスライドし、該中間緩衝具21,21が支柱の緩衝具11又は支柱3に衝突した後、ロープ材4,4´は中間緩衝具21と支柱3の緩衝具11に対して摺動して衝撃力を吸収する。この場合、支柱3に設けた緩衝具11に対して摺動を開始する際及び中間緩衝具21に対して摺動を開始する際、それぞれの静止摩擦係数に対応したエネルギー吸収が行われる。 In this way, in this embodiment, corresponding to claim 1 , the one end side 4A, 4A 'of the rope members 4, 4' is gripped between the stopper 22 and the shock absorber 11 with a predetermined friction force. In addition, since the intermediate shock absorbers 21 and 21 are provided to absorb the impact by allowing the rope members 4 and 4 'to slide when a predetermined tension or more is applied to the rope members 4 and 4', an impact such as falling rocks is provided. When a predetermined tension or more is applied to the rope members 4 and 4 ′ by the force, the rope members 4 and 4 ′ slide with respect to the shock absorber 3 provided on the support column 3, and the rope members 4 and 4 ′ are intermediate. After the shock absorbers 21 and 21 are slid and the intermediate shock absorbers 21 and 21 collide with the shock absorbers 11 or the struts 3 of the support columns, the rope members 4 and 4 ′ are in contact with the intermediate shock absorbers 21 and the shock absorbers 11 of the support columns 3. To absorb impact force. In this case, when starting to slide with respect to the buffer 11 provided on the column 3 and when starting to slide with respect to the intermediate buffer 21, energy absorption corresponding to each static friction coefficient is performed.

また、このように本実施例では、請求項に対応して、2本のロープ材4,4´の他端側4B,4B´をそれぞれ揺動可能に取り付けたから、前面に落石などを受け、ロープ材4,4´が落石箇所を中心に後に移動し、架設方向に対して後側に索条体の向きが変わるが、両側の支柱2,2に対してロープ材4,4´の他端側4B,4B´が揺動可能に連結されているため、向きが変ってもロープ材4,4´の他端側4B,4B´に無理な力が加わることがない。 In this way, in this embodiment, in correspondence with claim 2 , the other end sides 4B and 4B 'of the two rope members 4 and 4' are attached so as to be able to swing, respectively, so that the front surface receives falling rocks and the like. The rope members 4 and 4 ′ move backward around the falling rock part, and the direction of the rope changes to the rear side with respect to the installation direction, but the rope members 4 and 4 ′ Since the other end sides 4B and 4B 'are connected so as to be able to swing, no excessive force is applied to the other end sides 4B and 4B' of the rope members 4 and 4 'even if the direction is changed.

また、このように本実施例では、請求項に対応して、ロープ材4,4´に所定以上の張力が作用したとき該ロープ材4,4´が支柱3に取り付けた緩衝具11に対して摺動し、この支柱3の緩衝具11側に中間緩衝具21が接触し、両緩衝具11,21に対してロープ材4,4´が摺動するように構成したから、支柱3に取り付ける緩衝具11と、中間緩衝具21との組み合わせにより、衝撃力を効率よく吸収することができる。 In this way, in this embodiment, corresponding to claim 1 , when a predetermined tension or more is applied to the rope members 4, 4 ′, the rope members 4, 4 ′ are attached to the shock absorber 11 attached to the column 3. Since the intermediate shock absorber 21 is in contact with the shock absorber 11 side of the support 3 and the rope members 4 and 4 'slide with respect to the shock absorbers 11 and 21, the support 3 By combining the shock absorber 11 attached to the intermediate shock absorber 21 and the intermediate shock absorber 21, the impact force can be absorbed efficiently.

以上、本発明の実施例について詳述したが、本発明は、前記実施例に限定されるものではなく、本発明の要旨の範囲内で種々の変形実施が可能である As mentioned above, although the Example of this invention was explained in full detail, this invention is not limited to the said Example, A various deformation | transformation implementation is possible within the range of the summary of this invention .

本発明の実施例1を示す防護柵の要部の正面図である。It is a front view of the principal part of the guard fence which shows Example 1 of this invention. 同上、中間の支柱と緩衝具回りの正面図である。It is a front view around an intermediate | middle support | pillar and a shock absorber same as the above. 同上、中間の支柱の断面図である。It is sectional drawing of an intermediate | middle support | pillar same as the above. 同上、防護柵の正面図である。It is a front view of a protection fence same as the above. 同上、両側の支柱の上部の正面図である。It is a front view of the upper part of the support | pillar of both sides same as the above. 同上、緩衝具の断面図である。It is sectional drawing of a shock absorber same as the above. 同上、作用を説明する平面説明図であり、図7(A)は落石を受ける前、図7(B)は落石を受け、支柱の緩衝具に中間緩衝具が突き当たった状態、図7(C)は、中間緩衝具にストッパが突き当たった状態を示す。FIG. 7 (A) is a plan view for explaining the operation, FIG. 7 (A) is a state before receiving a falling rock, FIG. 7 (B) is a state where a falling rock is received, and the intermediate buffer is in contact with the buffer of the support, FIG. ) Shows a state where the stopper hits the intermediate shock absorber.

符号の説明Explanation of symbols

1 防護柵
2 端末パイプ支柱(両側の支柱)
3 中間パイプ支柱(中間の支柱)
4,4´ ロープ材(索状体)
5 金網(防護用網体)
11 緩衝具
21 中間緩衝金具
22 ストッパー
1 Guard fence 2 Terminal pipe support (supports on both sides)
3 Intermediate pipe strut (intermediate strut)
4,4 'rope material (cord)
5 Wire mesh (protective mesh)
11 Shock absorber
21 Intermediate buffer bracket
22 Stopper

Claims (2)

間隔を置いて支柱を立設し、これら支柱の間に上下に間隔をおいて索状体を架設した防護柵において、2本の前記索条体の一端側を所定の摩擦力で把持すると共に、前記索条体に所定以上の張力が作用したとき該索条体の摺動を許容することにより衝撃を吸収する緩衝具を中間の前記支柱に設け、この中間の支柱の両側の支柱に前記2本の索条体の他端側をそれぞれ取り付け、前記2本の索条体の一端側に、前記中間の支柱に前記張力を伝えるストッパを設け、前記ストッパと前記緩衝具との間に、前記索条体の一端側を所定の摩擦力で把持すると共に、前記索条体に所定以上の張力が作用したとき該索条体の摺動を許容することにより衝撃を吸収する中間緩衝具を設け、前記索条体に所定以上の張力が作用したとき該索条体が前記支柱に取り付けた緩衝具に対して摺動し、この支柱の緩衝具側に前記中間緩衝具が接触し、両緩衝具に対して索条体が摺動するように構成したことを特徴とする防護柵。 In a protective fence in which struts are erected at intervals, and a cord-like body is erected between the struts in the vertical direction, one end side of the two strands is gripped with a predetermined friction force The intermediate strut is provided with a shock absorber that absorbs shock by allowing the strut to slide when a predetermined tension is applied to the strut, and the struts on both sides of the intermediate strut Attach the other ends of the two cable bodies, and provide a stopper for transmitting the tension to the intermediate strut on one end side of the two cable bodies, between the stopper and the buffer, An intermediate shock absorber that absorbs an impact by gripping one end side of the strip body with a predetermined friction force and allowing sliding of the strip body when a predetermined tension or more is applied to the strip body. Provided, and when the tension more than a predetermined level is applied to the strip, the strip is attached to the support column. Sliding relative with the bumper, the intermediate bumper comes into contact with the bumper side of the pillar, rope body for both bumper is characterized by being configured to slide protection fence. 前記2本の索条体の他端側をそれぞれ揺動可能に取り付けたことを特徴とする請求項1記載の防護柵。 Claim 1 Symbol placement of fences, characterized in that the other end of the two rope body respectively mounted pivotably.
JP2004096780A 2004-03-29 2004-03-29 Protective fence Expired - Lifetime JP4115418B2 (en)

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JP5080373B2 (en) * 2008-06-11 2012-11-21 東京製綱株式会社 Transmission type dam
JP4924992B2 (en) * 2008-11-27 2012-04-25 日本サミコン株式会社 Protective fence, its buffer structure unit and improved method using the same
KR102521886B1 (en) * 2022-09-08 2023-04-24 어드벤처 주식회사 An upper connection structure that uses the safety net of the haneul forest road to prevent danger to the experiencer

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