JPH05295713A - Impulse force absorbing device for drop stone preventive body - Google Patents
Impulse force absorbing device for drop stone preventive bodyInfo
- Publication number
- JPH05295713A JPH05295713A JP10322392A JP10322392A JPH05295713A JP H05295713 A JPH05295713 A JP H05295713A JP 10322392 A JP10322392 A JP 10322392A JP 10322392 A JP10322392 A JP 10322392A JP H05295713 A JPH05295713 A JP H05295713A
- Authority
- JP
- Japan
- Prior art keywords
- force
- supporting
- support leg
- pillar
- net
- 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.)
- Pending
Links
Landscapes
- Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は落石の衝撃を吸収する落
石防止体に係わり、特に防止壁,防止網,防止柵等の落
石防止体の衝撃力吸収装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rockfall preventive body that absorbs the impact of rockfall, and more particularly to an impact force absorbing device for a rockfall preventive body such as a preventive wall, a preventive mesh and a preventive fence.
【0002】[0002]
【従来の技術】従来のこの種の落石防止体として、例え
ば実開昭56−138909号に開示されている落石防
止網設置用支柱構造体が知られている。この落石防止体
は、法面の基礎となる埋込みコンクリートに、アンカー
部材を介して複数の支柱を固定し、これら複数の支柱間
に網体を設け、さらに落石により支柱に加わる加重を支
持するため、該支柱にワイヤ等の支持部材を張設してい
る。2. Description of the Related Art As a conventional rock fall preventer of this type, for example, a pillar structure for rock fall preventive net installation disclosed in Japanese Utility Model Laid-Open No. 56-138909 is known. This rockfall prevention body fixes a plurality of struts to the embedded concrete that is the foundation of the slope with an anchor member, provides a net between these plurality of struts, and further supports the load applied to the stanchions by rockfall. A supporting member such as a wire is stretched over the support column.
【0003】[0003]
【発明が解決しようとする課題】上記従来の落石防止体
では、支柱を基礎に強固に固定し、支柱の剛性によって
落石による荷重を支持しようとするものであるから、一
定以上の荷重が加わると支柱が変形して破損し易く衝撃
力に対して脆い面がある。そしてこれを防止するため、
支柱に支持部材を張設し荷重に対して支柱の変形、破損
を防止するようにしている。しかしながらその支持部材
により補強を行っても、一定以上の荷重が加わるとその
支柱が変形し、後の落石防止機能が失われ、補修あるい
は再施工を行わなければならないという問題があった。In the above-mentioned conventional rock fall prevention body, the support is firmly fixed to the foundation and the load of rock fall is supported by the rigidity of the support. The pillar is easily deformed and damaged, and has a surface that is vulnerable to impact force. And to prevent this,
A support member is stretched over the pillar to prevent the pillar from being deformed or damaged by the load. However, even if the support member is reinforced, the pillar is deformed when a load of a certain amount or more is applied, and the rockfall preventing function afterwards is lost, and there is a problem that repair or re-construction must be performed.
【0004】そこで本発明は衝撃吸収能力に優れ、変形
および破損しにくい落石防止体の衝撃力吸収装置を提供
することを目的とする。Therefore, an object of the present invention is to provide an impact force absorbing device for a rockfall preventive body which is excellent in impact absorbing ability and is resistant to deformation and damage.
【0005】[0005]
【課題を解決するための手段】本発明は落石防止体に弾
性復元力を有する支持脚部を設けたものである。SUMMARY OF THE INVENTION The present invention provides a rockfall prevention body provided with support legs having an elastic restoring force.
【0006】[0006]
【作用】落石の衝撃力が落石防止体に加わると、支持脚
部が弾性変形して該衝撃力を吸収し、また衝撃力が無く
なると、支持脚部の弾性復元力により落石防止体が元の
位置に復帰する。[Function] When the impact force of rockfall is applied to the rockfall prevention body, the support leg portion is elastically deformed to absorb the impact force, and when the impact force disappears, the rockfall prevention body is restored by the elastic restoring force of the support leg portion. Return to the position.
【0007】[0007]
【実施例】以下、本発明の実施例を添付図面を参照して
説明する。図1ないし図4は本発明の第1実施例を示
し、落石防止体として防止網1を用いたものであり、金
属製等からなる複数の支柱本体2が間隔を置いて配設さ
れ、この支柱本体2の下端には弾性復元力を有する支持
脚部3が固着され、この支持脚部3は、金属製例えばば
ね鋼からなる線材を密に巻いたコイルばねが用いられ、
その支持脚部3の下端が基礎支柱4に固着され、この基
礎支柱4が基礎コンクリート5により地面に固定されて
いる。前記支柱本体1には金属製等からなる網体6が全
面に張設され、この網体6は線材を六角形の網目に形成
して伸縮性を有するものであって、さらに図1に示すよ
うに弛み部6Aが形成されている。また支柱本体2,2
間には、補強用の金属製等からなる複数本のワイヤ7が
平行に張設されるとともに、隣合う支柱本体2,2間に
X状に金属製等からなるワイヤ8が張設されている。Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 to 4 show a first embodiment of the present invention, in which a prevention net 1 is used as a rock fall prevention body, and a plurality of pillar main bodies 2 made of metal or the like are arranged at intervals. A support leg portion 3 having an elastic restoring force is fixed to the lower end of the column main body 2, and the support leg portion 3 is a coil spring formed by closely winding a wire made of metal, for example, spring steel,
The lower ends of the support legs 3 are fixed to a foundation pillar 4, and the foundation pillar 4 is fixed to the ground by foundation concrete 5. A mesh body 6 made of metal or the like is stretched over the entire surface of the pillar body 1. The mesh body 6 is formed by forming a wire into a hexagonal mesh and has elasticity, and is further shown in FIG. Thus, the slack portion 6A is formed. In addition, the pillar body 2, 2
A plurality of wires 7 made of metal or the like for reinforcement are stretched in parallel between them, and a wire 8 made of metal or the like is stretched in an X shape between the adjacent pillar bodies 2 and 2. There is.
【0008】次に前記構成につきその作用を説明する
と、落石Rの衝撃力すなわち運動エネルギーが防止網1
に加わると、コイルばねからなる支持脚部3が変形して
支柱本体2が傾きあるいはほぼ90度まで倒れ、支持脚
部3の弾性変形により落石Rの運動エネルギーを吸収す
る。そして落石Rが停止し、支柱本体2に働く力が前記
運動エネルギーに比べて小さいその静荷重のみになる
と、支持脚部3の弾性復元力により落石Rが前方に押し
出され、支柱本体2が元の位置すなわち起立する。また
落石Rの自重が支持脚部3の弾性復元力より大の場合
は、監視者等が落石Rを取り除くと、支持脚部3の弾性
復元力により支柱本体2が起立し、この場合倒れた防止
網1から落石Rを取り除く際にも、落石Rに支持脚部3
の弾性復元力が働くため、比較的容易に落石Rを除去す
ることができる。The operation of the above structure will now be described. The impact force of the falling rock R, that is, the kinetic energy is the prevention net 1.
In addition, the support leg portion 3 made of a coil spring is deformed, the pillar main body 2 is tilted or tilted up to about 90 degrees, and the elastic deformation of the support leg portion 3 absorbs the kinetic energy of the rock fall R. Then, when the falling rock R stops and the force acting on the strut main body 2 becomes only a static load that is smaller than the kinetic energy, the falling rock R is pushed forward by the elastic restoring force of the support leg portion 3, and the strut main body 2 is removed. Position or stand up. If the weight of the falling rock R is larger than the elastic restoring force of the support leg 3, when the observer removes the falling rock R, the elastic restoring force of the support leg 3 causes the column main body 2 to stand up and collapse. Even when removing the rockfall R from the prevention net 1, the support leg 3 is attached to the rockfall R.
Since the elastic restoring force of 1 works, the rockfall R can be removed relatively easily.
【0009】このように本発明においては、落石防止体
である防止網1に弾性復元力を有する支持脚部3を設け
たものであるから、落石Rの衝撃力が防止網1に加わる
と、支持脚部3が弾性変形して該衝撃力を吸収し、衝撃
吸収能力に優れたものとなり、また、従来のもののよう
に剛性により衝撃力を受けるものに比べて、防止網1が
弾性変形により衝撃力を吸収するものであるから、防止
網1の破損変形が少なくなり、さらに落石Rの衝撃力が
無くなると、支持脚部3の弾性復元力により防止網1が
元の位置に復帰するため、維持管理が容易なものにな
る。As described above, according to the present invention, since the supporting net 3 having the elastic restoring force is provided on the prevention net 1 which is a rock fall prevention body, when the impact force of the rock fall R is applied to the prevention net 1. The supporting legs 3 are elastically deformed to absorb the impact force and have an excellent impact absorbing ability, and the prevention net 1 is elastically deformed as compared with the conventional one that receives the impact force due to rigidity. Since the shock absorbing force is absorbed, the damage and deformation of the prevention net 1 decreases, and when the impact force of the falling rock R disappears, the elastic restoring force of the support leg 3 causes the prevention net 1 to return to its original position. , Easy to maintain.
【0010】また実施例上の効果として、複数の支柱本
体2を間隔をおいて配置し、その支柱本体2の全てに支
持脚部3を設け、網体6およびワイヤ7により全ての支
柱本体2を一体的に連結したことにより、落石Rに対し
て図4に示すように全ての支持脚部3が弾性変形してそ
の衝撃力を効果的に吸収し、かつ全ての支持脚部3の弾
性復元力により防止網1を元の位置に復帰することがで
きる。さらに伸縮性を有する網体6に弛み部6Aを設け
たことにより、網体6に落石Rが衝突しても網体6自身
の伸縮により、支柱本体2に衝撃力が緩やかに伝えられ
る。Further, as an effect of the embodiment, a plurality of pillar bodies 2 are arranged at intervals, all of the pillar bodies 2 are provided with the support leg portions 3, and the net body 6 and the wires 7 are used for all the pillar bodies 2. By integrally connecting the support legs 3 with respect to the falling rock R, all the support legs 3 are elastically deformed as shown in FIG. 4, the impact force is effectively absorbed, and the elasticity of all the support legs 3 is increased. The restoring force enables the prevention net 1 to return to its original position. Further, by providing the elastic net body 6 with the slack portion 6A, even if the falling rock R collides with the net body 6, the net body 6 itself expands and contracts, so that the impact force is gently transmitted to the column main body 2.
【0011】図5ないし図8はは本発明の第2実施例を
示し、上記第1実施例と同一部分に同一符号を付しその
詳細な説明を省略して詳述すると、この例では支柱本体
2の頂部にワイヤロープあるいはピアノ線等の支持用線
材9を固定するとともに、その線材9を前方の地面にア
ンカー10により固定している。前記支持用線材9は図6
のように上線材9Aと下線材9Bとを備え、上線材9A
の上端側が前記アンカー10により地面に固定されるとと
もに、上線材9Aの下端側と下線材9Bの上端側とが相
互に重ね合わされて重複部11を形成し、この重複部11の
上線材9Aと下線材9Bとを2個の締付部材12により間
隔を置いて緊結し固定している。13は上線材9Aと下線
材9Bのそれぞれの端部に固定した端末突部である。そ
の場合締付部材13は図8のようにUボルト12Aに止板12
Bを介しナット12Cを螺締するものを示している。5 to 8 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. A supporting wire 9 such as a wire rope or a piano wire is fixed to the top of the main body 2, and the wire 9 is fixed to the ground in front by an anchor 10. The supporting wire 9 is shown in FIG.
9A of upper wire rods and 9B of lower wire rods,
The upper end side of the upper wire 9A is fixed to the ground by the anchor 10, and the lower end side of the upper wire 9A and the upper end side of the lower wire 9B are overlapped with each other to form an overlapping portion 11, and the upper wire 9A of the overlapping portion 11 The lower wire 9B and the lower wire 9B are tightly connected and fixed by two tightening members 12 at intervals. Reference numeral 13 is a terminal protrusion fixed to each end of the upper wire 9A and the lower wire 9B. In that case, the fastening member 13 is attached to the U bolt 12A and the stop plate 12 as shown in FIG.
It shows that the nut 12C is screwed through B.
【0012】そして、防止網1に落石Rの衝撃力すなわ
ち運動エネルギーが加わると、支持用線材9に引張力が
作用して上線材9Aと下線材9Bは締付部材12の緊締力
に抗して摺動しようとする。そして線材9に加わる引張
力が締付部材12による限界静止摩擦抵抗を越えると、重
複部11の上線材9Aと下線材9Bは図7(A)に示すよ
うに重複部11の状態を解除する方向に摺動して端末突部
13が締付部材12に係止する。同時にその摺動に伴い支持
脚部3が弾性変形し、支柱本体2が傾斜する。また、さ
らに大きな引張力が作用すると重複部11の状態を解除す
る方向にさらに摺動して図7(B)のように2個の締付
部材12どうしが衝合する。この様にして重複部11の上線
材9Aと下線材9Bが締付部材12の締付力に抗して摺動
している間、摩擦による相当量のエネルギー損失が生じ
る結果となり、さらに支持脚部3の弾性変形により、落
石Rの衝撃力が吸収されるものであり、しかも第1段階
で締付部材12の静止状態で支持用線材9が摺動し、第2
段階で末端突部13と締付部材12の係合により締付部材12
を移動させながら摺動し、さらに支柱本体2の傾斜に伴
ない支持脚部3が弾性変形するものであるため衝撃吸収
能力に高いものとなる。そして落石Rが停止し、支柱本
体2に働く力が前記運動エネルギーより小さいその自重
のみになると、支持脚部3の弾性復元力により支柱本体
2が元の位置すなわち起立する。When the impact force of the rockfall R, that is, the kinetic energy, is applied to the prevention net 1, a tensile force acts on the supporting wire 9 so that the upper wire 9A and the lower wire 9B resist the tightening force of the tightening member 12. Try to slide. When the tensile force applied to the wire rod 9 exceeds the limit static friction resistance due to the tightening member 12, the upper wire rod 9A and the lower wire rod 9B of the overlapping portion 11 release the state of the overlapping portion 11 as shown in FIG. 7 (A). Sliding in the direction
13 is locked to the tightening member 12. At the same time, the supporting legs 3 are elastically deformed due to the sliding, and the column main body 2 is inclined. Further, when a larger tensile force is applied, the two tightening members 12 abut against each other as shown in FIG. 7B by further sliding in the direction of releasing the state of the overlapping portion 11. In this way, while the upper wire 9A and the lower wire 9B of the overlapping portion 11 slide against the tightening force of the tightening member 12, a considerable amount of energy is lost due to friction, and further, the supporting legs are not supported. Due to the elastic deformation of the portion 3, the impact force of the falling rock R is absorbed, and further, in the first stage, the supporting wire 9 slides while the tightening member 12 is stationary, and
At the stage, the tightening member 12 is caused by the engagement between the end protrusion 13 and the tightening member 12.
Slides while moving, and the supporting leg portion 3 elastically deforms in accordance with the inclination of the column main body 2, so that the shock absorbing ability is high. Then, when the falling rock R stops and the force acting on the column body 2 becomes only its own weight smaller than the kinetic energy, the column body 2 is erected in its original position due to the elastic restoring force of the support leg 3.
【0013】このように本発明においては、落石防止体
である防止網1に弾性復元力を有する支持脚部3を設
け、防止網1に固定した支持用線材9と土山に固定した
支持線材9との端部どうしを重ね合わせて重複部11を形
成し、その重複部11を複数間隔を置いて設けられた締付
部材12により緊結し、重複部11を形成する各線材9A,
9Bに端末突部13,13を設け、支持用線材9に加わる引
張力によって端末突部13が締付部材12に係止しかつ締付
部材12が移動することを可能にしたものであるから、重
複部11の上線材9Aと下線材9Bが締付部材12の締付力
に抗して摺動している間、摩擦による相当量のエネルギ
ー損失が生じる結果となり、さらに支持脚部3の弾性変
形により落石Rの衝撃力が吸収され、衝撃吸収能力に優
れたものとなる。As described above, according to the present invention, the prevention net 1 which is a rockfall prevention body is provided with the support leg portion 3 having an elastic restoring force, and the support wire 9 fixed to the prevention net 1 and the support wire 9 fixed to the earth pile. The overlapping parts 11 are formed by superimposing the end portions of and the overlapping parts 11 and the overlapping parts 11 are tightly bound together by the tightening members 12 provided at a plurality of intervals to form the overlapping parts 11.
9B is provided with the terminal projections 13 and 13 so that the tensile force applied to the supporting wire 9 allows the terminal projection 13 to be locked to the fastening member 12 and the fastening member 12 to move. While the upper wire 9A and the lower wire 9B of the overlapping portion 11 are sliding against the tightening force of the tightening member 12, a considerable amount of energy is lost due to friction, and further, the supporting leg 3 The elastic deformation absorbs the impact force of the falling rock R, and the impact absorbing ability becomes excellent.
【0014】図9および図10は本発明の第3実施例を
示し、上記第1実施例および第2実施例と同一部分に同
一符号を付しその詳細な説明を省略して詳述すると、こ
の例では一本の支持用線材9の要部を輪状のループ14に
形成して重複部15を形成し、この重複部15を2個の締付
部材12により間隔を置いて緊締し固定している。したが
って、防止網2に落石Rの衝撃力すなわち運動エネルギ
ーが加わると、第2実施例と同様に第1段階で締付部材
12の緊張力に抗して図10(A)のようにループ14を解
除する方向に線材9は移動してループ14の両端側は2個
の締付部材12に係止した状態になる。さらに引張荷重が
加わると第2段階で図10(B)のように重複部15の状
態を解除する方向にさらに線材9を移動させながら伸出
移動して2個の締付部材12どうしが衝合する。この様に
してループ14の重複部15の線材9が締付部材12の締付力
に抗して移動している間摩擦による相当量のエネルギー
損失が生じる結果になり、かつ支柱本体2の傾斜に伴い
支持脚部3が弾性変形して落石Rの衝撃力を吸収するも
のである。そして落石Rが停止し、支柱本体2に働く力
が前記運動エネルギーより小さいその静荷重のみになる
と、支持脚部3の弾性復元力により支柱本体2が元の位
置すなわち起立する。9 and 10 show a third embodiment of the present invention. The same parts as those of the first and second embodiments are designated by the same reference numerals, and detailed description thereof will be omitted. In this example, an essential part of one supporting wire 9 is formed in a loop loop 14 to form an overlapping part 15, and the overlapping part 15 is tightened and fixed by two tightening members 12 at intervals. ing. Therefore, when the impact force of the falling rock R, that is, the kinetic energy is applied to the prevention net 2, the tightening member at the first stage as in the second embodiment.
The wire 9 moves in the direction of releasing the loop 14 as shown in FIG. 10 (A) against the tension of 12 and both ends of the loop 14 are locked by the two fastening members 12. When a tensile load is further applied, in the second stage, the wire rod 9 is further extended while moving the wire 9 in the direction to release the overlapping portion 15 as shown in FIG. 10B, and the two fastening members 12 collide with each other. To meet. In this way, a considerable amount of energy is lost due to friction while the wire 9 of the overlapping portion 15 of the loop 14 moves against the tightening force of the tightening member 12, and the tilt of the strut body 2 is increased. Accordingly, the support leg portion 3 is elastically deformed to absorb the impact force of the falling rock R. Then, when the rockfall R stops and the force acting on the pillar body 2 becomes only the static load smaller than the kinetic energy, the pillar body 2 is erected in its original position due to the elastic restoring force of the support leg 3.
【0015】図11は本発明の第4実施例を示し、上記
第1実施例と同一部分に同一符号を付しその詳細な説明
を省略して詳述すると、この例では支柱本体2と基礎支
柱4とを角柱状に形成し、支持脚部3Aとして複数の板
ばねを重ね合わせた重ね板ばねを用いたものを示し、こ
の例でも落石Rの衝撃力が防止網1に加わると、支持脚
部3Aが弾性変形して該衝撃力を吸収し衝撃吸収能力に
優れたものとなり、また防止網1の破損変形が少なく第
1実施例と同様な作用、効果を有し、また重ね板ばねを
支持脚部3Aに用いることにより、支柱本体2の前後方
向への傾斜をスムーズに行うことができる。FIG. 11 shows a fourth embodiment of the present invention, in which the same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted. A pillar 4 is formed in a prismatic shape, and a stacked leaf spring in which a plurality of leaf springs are stacked is used as the support leg portion 3A. Also in this example, when the impact force of the falling rock R is applied to the prevention net 1, it is supported. The leg portion 3A elastically deforms to absorb the impact force and has an excellent impact absorbing ability, and the breakage and deformation of the prevention net 1 is small and has the same action and effect as those of the first embodiment. Is used for the support leg portion 3A, the pillar main body 2 can be smoothly inclined in the front-rear direction.
【0016】図12は本発明の第5実施例を示し、上記
第1実施例と同一部分に同一符号を付しその詳細な説明
を省略して詳述すると、この例では支柱本体2と基礎支
柱4とを角柱状に形成し、支持脚部3Bとして中空形の
ゴムばねを用いたものを示し、この例でも落石Rの衝撃
力が防止網1に加わると、支持脚部3Bが弾性変形して
該衝撃力を吸収し衝撃吸収能力に優れたものとなり、ま
た防止網1の破損変形が少なく第1実施例と同様な作
用、効果を有する。FIG. 12 shows a fifth embodiment of the present invention, in which the same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted. The pillar 4 is formed in a prismatic shape, and a hollow rubber spring is used as the support leg portion 3B. In this example as well, when the impact force of the falling rock R is applied to the prevention net 1, the support leg portion 3B is elastically deformed. As a result, the shock absorbing force is absorbed and the shock absorbing ability is excellent, and the damage and deformation of the prevention net 1 is small, and the same action and effect as those of the first embodiment are obtained.
【0017】図13は本発明の第6実施例を示し、上記
第1実施例と同一部分に同一符号を付しその詳細な説明
を省略して詳述すると、この例では支柱本体2と基礎支
柱4とを連結する支持脚部3Cは、ほぼ中空円筒状をな
すゴムばね16内に金属製コイルばね16Aを埋設したもの
を用いており、この例でも落石Rの衝撃力が防止網1に
加わると、支持脚部3が弾性変形して該衝撃力を吸収し
衝撃吸収能力に優れたものとなり、また防止網1の破損
変形が少なく第1実施例と同様な作用、効果を有し、ゴ
ムばね16とコイルばね16Aの複合により、支柱本体1は
90度以上に傾斜することも可能になり、また元に復帰
することができるという良好な弾性復元力が得られる。FIG. 13 shows a sixth embodiment of the present invention. The same parts as those of the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted. The supporting leg portion 3C connecting to the support column 4 is formed by embedding a metal coil spring 16A in a rubber spring 16 having a substantially hollow cylindrical shape. In this example as well, the impact force of the falling rock R acts on the prevention net 1. When added, the supporting legs 3 are elastically deformed to absorb the impact force and have an excellent impact absorbing ability, and the damage and deformation of the prevention net 1 are small, and the same action and effect as those of the first embodiment, Due to the combination of the rubber spring 16 and the coil spring 16A, it is possible to incline the strut main body 1 by 90 degrees or more and obtain a good elastic restoring force that allows the strut body 1 to return to the original state.
【0018】図14は本発明の第7実施例を示し、上記
第1実施例と同一部分に同一符号を付しその詳細な説明
を省略して詳述すると、この例では落石防止体として防
止壁1Aを用いたものを示し、この防止壁1Aは、複数
の例えばプレキャストコンクリートからなる支柱本体2
Aを間隔を置いて配置し、この支柱本体2Aに複数のプ
レキャストコンクリートからなる横梁6Bを設け、前記
支柱本体2Aの下端に弾性復元力を有する支持脚部3を
固着し、この支持脚部3の線材を下方に延設してコ字状
に形成したアンカー部5Aをコンクリート基礎5に埋設
して固定している。FIG. 14 shows a seventh embodiment of the present invention, in which the same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted. The thing using the wall 1A is shown, This prevention wall 1A is the pillar main body 2 which consists of a plurality of precast concrete, for example.
A are spaced apart from each other, a cross beam 6B made of a plurality of precast concrete is provided on the strut body 2A, and a supporting leg portion 3 having an elastic restoring force is fixed to the lower end of the strut body 2A. An anchor portion 5A, which is formed by extending the wire rod in the downward direction and having a U-shape, is embedded and fixed in the concrete foundation 5.
【0019】このように本発明においては、落石防止体
であるコンクリート製防止壁1Aに弾性復元力を有する
支持脚部3を設けたものであるから、落石Rの衝撃力が
防止壁1Aに加わると、支持脚部3が弾性変形して該衝
撃力を吸収するため、衝撃吸収能力に優れたものとな
り、また、従来のもののように剛性により衝撃力を受け
るものに比べて、防止壁1Aが弾性変形により衝撃力を
吸収し、防止壁1Aの破損変形が少なくなり、さらに、
落石Rの衝撃力が無くなると、支持脚部3の弾性復元力
により防止壁1が元の位置に復帰するため、維持管理が
容易なものになる。As described above, in the present invention, since the concrete prevention wall 1A which is a rock fall prevention body is provided with the support leg portion 3 having an elastic restoring force, the impact force of the rock fall R is applied to the prevention wall 1A. Since the support leg 3 elastically deforms and absorbs the impact force, the support leg portion 3 has an excellent impact absorbing ability, and the prevention wall 1A has The elastic deformation absorbs the impact force, reducing the damage deformation of the prevention wall 1A.
When the impact force of the falling rock R disappears, the elastic restoring force of the support leg portion 3 returns the prevention wall 1 to the original position, which facilitates maintenance.
【0020】図15は本発明の第8実施例を示し、上記
第1実施例と同一部分に同一符号を付しその詳細な説明
を省略して詳述すると、この例では支柱本体2と基礎支
柱4とを角柱状に形成し、支持脚部3Aとして複数の板
ばねを重ね合わせた重ね板ばねを用いたものを示し、そ
の支持脚部3Aの上端は支柱本体2に固着し、下端は取
付軸17を介して基礎支柱4に取り付け、この基礎支柱4
には前記取付軸17がスライド可能な逃孔17を後方に向か
って斜め上方に形成し、かつ支持脚部3Aの下端には回
止めのストッパ部18を一体に設けている。そして落石R
により防止体に衝撃力が加わると、ストッパ部18により
回止めされて支持脚部3Aが弾性変形し衝撃力を吸収
し、あるいはストッパ部18の回止めを解除するような大
きな衝撃を受けると、取付軸16が逃孔17に沿って移動
し、衝撃力を吸収する。この例でも落石Rの衝撃力が防
止網1に加わると、支持脚部3Aが弾性変形して該衝撃
力を吸収し衝撃吸収能力に優れたものとなり、また防止
網1の破損変形が少なく第1実施例と同様な作用、効果
を有し、また取付軸16が逃孔17に沿って移動するため支
柱本体2が前後だけでなく左右方向にも傾くことができ
る。FIG. 15 shows an eighth embodiment of the present invention, in which the same parts as those in the first embodiment are designated by the same reference numerals and detailed description thereof will be omitted. The pillar 4 and the pillar 4 are formed in a prismatic shape, and a stacked leaf spring in which a plurality of leaf springs are stacked is used as the support leg portion 3A. The upper end of the support leg portion 3A is fixed to the pillar body 2 and the lower end is It is attached to the foundation column 4 via the mounting shaft 17, and the foundation column 4
The mounting shaft 17 is formed with an escape hole 17 slidably upward toward the rear, and a stopper 18 for stopping rotation is integrally provided at the lower end of the support leg 3A. And falling rock R
When an impact force is applied to the preventive body by means of, the stopper portion 18 prevents the support leg portion 3A from elastically deforming to absorb the impact force, or when a large impact is released to release the stopper portion 18 from being stopped. The mounting shaft 16 moves along the escape hole 17 to absorb the impact force. Also in this example, when the impact force of the falling rock R is applied to the prevention net 1, the support leg portion 3A elastically deforms to absorb the impact force and has an excellent shock absorbing ability, and the damage prevention deformation of the prevention net 1 is small. It has the same operation and effect as the first embodiment, and since the mounting shaft 16 moves along the escape hole 17, the column main body 2 can be tilted not only in the front-back direction but also in the left-right direction.
【0021】尚、本発明は上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において種々の変形実施
が可能であり、例えば支持脚部の長さ寸法および材質は
適宜選定することができ、また支持脚部は大小コイルば
ねを二重に用いるものや、コイルばねと板ばねを組み合
わせたもの、あるいは板ばねとゴムばねとを組み合わせ
たもの等各種の弾性復元力を有するものを用いることが
できる。The present invention is not limited to the above-described embodiment, but various modifications can be made within the scope of the present invention. For example, the length dimension and material of the supporting leg portion can be appropriately selected. In addition, the support leg may have various elastic restoring forces, such as a double use of large and small coil springs, a combination of coil springs and leaf springs, or a combination of leaf springs and rubber springs. Can be used.
【0022】[0022]
【発明の効果】本発明は落石防止体に弾性復元力を有す
る支持脚部を設けたものであるから、衝撃吸収能力に優
れ、変形および破損しにくい落石防止体の衝撃力吸収装
置を提供することができる。As described above, the present invention provides a shock-absorbing device for a rock-fall preventive body which is excellent in shock-absorbing ability and which is not easily deformed or damaged because the rock-fall preventive body is provided with supporting legs having elastic restoring force. be able to.
【図1】本発明の第1実施例を示す防止網の一部切欠き
断面図である。FIG. 1 is a partially cutaway sectional view of a prevention net according to a first embodiment of the present invention.
【図2】本発明の第1実施例を示す一部を拡大して防止
網の斜視図である。FIG. 2 is a partially enlarged perspective view of the prevention net showing the first embodiment of the present invention.
【図3】本発明の第1実施例を示す支持脚部の断面図で
ある。FIG. 3 is a sectional view of a supporting leg portion showing a first embodiment of the present invention.
【図4】本発明の第1実施例を示す落石を受けた防止網
の平面図である。FIG. 4 is a plan view of a prevention net that has received rockfall according to the first embodiment of the present invention.
【図5】本発明の第2実施例を示す防止網の側面図であ
る。FIG. 5 is a side view of the prevention net showing the second embodiment of the present invention.
【図6】本発明の第2実施例を示す重複部の側面図であ
る。FIG. 6 is a side view of an overlapping portion showing a second embodiment of the present invention.
【図7】本発明の第2実施例を示す作用状態の説明図で
ある。FIG. 7 is an explanatory diagram of a working state showing the second embodiment of the present invention.
【図8】本発明の第2実施例を示す締付部材の断面図で
ある。FIG. 8 is a sectional view of a fastening member showing a second embodiment of the present invention.
【図9】本発明の第3実施例を示す重複部の側面図であ
る。FIG. 9 is a side view of an overlapping portion showing a third embodiment of the present invention.
【図10】本発明の第3実施例を示す作用状態の説明図
である。FIG. 10 is an explanatory diagram of a working state showing the third embodiment of the present invention.
【図11】本発明の第4実施例を示す支持脚部の断面図
である。FIG. 11 is a sectional view of a support leg portion showing a fourth embodiment of the present invention.
【図12】本発明の第5実施例を示す支持脚部の要部の
断面図である。FIG. 12 is a sectional view of a main part of a support leg portion showing a fifth embodiment of the present invention.
【図13】本発明の第6実施例を示す支持脚部の要部の
断面図である。FIG. 13 is a sectional view of an essential part of a support leg portion showing a sixth embodiment of the present invention.
【図14】本発明の第7実施例を示す防止壁の断面図で
ある。FIG. 14 is a sectional view of a prevention wall showing a seventh embodiment of the present invention.
【図15】本発明の第8実施例を示す支持脚部の断面図
である。FIG. 15 is a sectional view of a supporting leg portion showing an eighth embodiment of the present invention.
1 防止網(落石防止体) 1A 防止柵(落石防止体) 2,2A 支柱本体 3,3A,3B,3C 支持脚部 1 Prevention net (falling stone prevention body) 1A Prevention fence (falling stone prevention body) 2,2A Strut body 3,3A, 3B, 3C Support leg
Claims (1)
部を設けたことを特徴とする落石防止体の衝撃力吸収装
置。1. An impact force absorbing device for a rock fall prevention body, wherein a support leg portion having an elastic restoring force is provided on the rock fall prevention body.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10322392A JPH05295713A (en) | 1992-04-22 | 1992-04-22 | Impulse force absorbing device for drop stone preventive body |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10322392A JPH05295713A (en) | 1992-04-22 | 1992-04-22 | Impulse force absorbing device for drop stone preventive body |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH05295713A true JPH05295713A (en) | 1993-11-09 |
Family
ID=14348498
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10322392A Pending JPH05295713A (en) | 1992-04-22 | 1992-04-22 | Impulse force absorbing device for drop stone preventive body |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH05295713A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1088527A (en) * | 1996-08-30 | 1998-04-07 | Fuatsuaa Ag | Protection device for receiving falling rock and absorbing high kinetic energy thereof |
WO2008081557A1 (en) * | 2006-12-27 | 2008-07-10 | Protec Engineering Inc. | Shock-absorbing protective fence |
JP2010255648A (en) * | 2009-04-21 | 2010-11-11 | Nippon Zenith Pipe Co Ltd | Damper device and energy absorbing body |
US8079571B2 (en) | 2008-02-06 | 2011-12-20 | Protec Engineering Inc. | Shock-absorbing fence |
JP5182976B1 (en) * | 2012-07-17 | 2013-04-17 | 株式会社プロテックエンジニアリング | Support structure |
KR101388746B1 (en) * | 2012-10-30 | 2014-04-25 | 김진아 | Functional fence |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5224304B2 (en) * | 1973-09-29 | 1977-06-30 | ||
JPH0237920B2 (en) * | 1982-12-27 | 1990-08-28 | Shin Nisso Kako Co Ltd |
-
1992
- 1992-04-22 JP JP10322392A patent/JPH05295713A/en active Pending
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5224304B2 (en) * | 1973-09-29 | 1977-06-30 | ||
JPH0237920B2 (en) * | 1982-12-27 | 1990-08-28 | Shin Nisso Kako Co Ltd |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH1088527A (en) * | 1996-08-30 | 1998-04-07 | Fuatsuaa Ag | Protection device for receiving falling rock and absorbing high kinetic energy thereof |
WO2008081557A1 (en) * | 2006-12-27 | 2008-07-10 | Protec Engineering Inc. | Shock-absorbing protective fence |
US8079571B2 (en) | 2008-02-06 | 2011-12-20 | Protec Engineering Inc. | Shock-absorbing fence |
JP2010255648A (en) * | 2009-04-21 | 2010-11-11 | Nippon Zenith Pipe Co Ltd | Damper device and energy absorbing body |
JP5182976B1 (en) * | 2012-07-17 | 2013-04-17 | 株式会社プロテックエンジニアリング | Support structure |
WO2014013631A1 (en) * | 2012-07-17 | 2014-01-23 | 株式会社プロテックエンジニアリング | Post structure |
US8857795B2 (en) | 2012-07-17 | 2014-10-14 | Protec Engineering, Inc. | Tiltable support post structure |
KR101388746B1 (en) * | 2012-10-30 | 2014-04-25 | 김진아 | Functional fence |
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