TWI604106B - Pillar structure and protective grid - Google Patents

Description

Pillar structure and protective fence

The present invention relates to an energy absorption technique suitable for absorbing static loads such as falling rocks, caving earth sands, avalanches, and the like, such as dynamic loads or snow pressures (hereinafter referred to as "energy"), and more particularly to pillar structures capable of effectively absorbing energy. And protective fence.

In general, in the pillar of such a protective grille, in order to resist bending and axial force, a rigid body such as a steel or concrete filled steel pipe is formed, but the conventional pillar is heavy, and it is not easy to move into the setting place of the mountain land, and is on site. Installation work also depends on heavy machinery, and construction is a problem.

Further, Patent Document 1 discloses a pillar structure in which a high-strength main pillar, a high-rigidity oblique pillar, and a plurality of connecting ropes are combined, and an avalanche shield used therewith.

The pillar structure is configured such that the two pillars are crossed into an X shape, and the base end of the diagonal pillar is fixed to the slope by a ground anchor, and the connecting rope is connected between the free ends of the two pillars and the base end. The lower side of the protective net is fixed on the upper part of the main strut and the lower part of the diagonal strut.

The compression load of the two pillars and the tension of the connecting rope counteract the snow load on the protective net.

In order to solve the problem of the protective barrier disclosed in Patent Document 1, the applicant has previously proposed a pillar structure in which a plurality of bars having flexibility are used to constitute a main pillar and an oblique pillar, and a protective grille using the same (Patent Document) 2).

Patent Document 1: Japanese Laid-Open Patent Publication No. 2007-63831

Patent Document 2: Japanese Laid-Open Patent Publication No. 2010-255648

The protective barrier described in the prior patent document 1 has the following problems.

(1) Although the main strut and the diagonal strut have high compressive strength, they do not have the absorption function of the load.

Therefore, when the axial force exceeding the expected axial force acts on the main strut and the oblique strut, the strut suddenly breaks and breaks and loses the grid function.

(2) When a high-speed or partial load such as an avalanche or a falling rock acts on the protective barrier, not only the compressive force, the bending force or the twisting force are applied to the respective pillars.

Since the pillar structure cannot respond to the bending force or the twisting force, it is easy to lose the stable balance of the pillar structure. If the balance is lost, the pillar structure will suddenly break.

(3) Although the base end of the main strut and the inclined strut which constitute the strut structure allows the rotation in the oblique direction along the inclined surface, the rotation in the direction orthogonal to the oblique direction of the inclined surface is restricted.

Therefore, when a large force acts on the pillar structure in the direction orthogonal to the slope of the slope, the axial end portions of the base ends of the two pillars are broken.

(4) When one of the plurality of pillar structures is broken by the above (1) to (3), the damage of the pillar structure is expanded in a chain, and the function as the entire barrier is lost.

(5) In order to repair the damaged pillar structure, it is necessary to replace a pillar structure, and replacement requires a lot of time, labor, and cost.

The protective gate described in Patent Document 2 has the following points of improvement.

(1) In order to properly distribute the load on the main strut and the diagonal strut, it is important to set the balance of elasticity and hardness of each strut according to the design model, the intersection angle of each strut, the strength of the connecting rope, and the installation distance of the lower two pillars. of.

Since the slope of the mountain is not a smooth gradient, there are many undulations, so it is not easy to set the pillar structure according to the above design model.

Therefore, if the design structure is sacrificed and the pillar structure is set in accordance with the undulation of each installation site, the installation distance between the base ends of the two pillars or the vertical angle of the protective net becomes uneven, especially in the portion where the protective net is greatly inclined. The defect of high to low.

(2) The pillar structure is a structure that determines the sharing ratio of the main pillar and the attenuation effect of the diagonal pillar.

As described above, when the intersection angle or the installation interval of the two pillars is affected by the undulation of the slope, the sharing ratio of the damping action changes in the unit of each pillar structure, and it is difficult to normally calculate the attenuation performance of each pillar structure.

In particular, when the attenuation balance of each of the pillars that are elastically deformed is lost, not only the original attenuation performance but also the extreme deformation of the gate height at the time of the first impact is lowered, and the subsequent impact cannot be responded to.

(3) Although the dimensional balance of the pillar structure is designed to have a certain margin, when the dimensional balance of the pillar structure exceeds the allowable value, the energy absorbing performance is affected, and the stability performance cannot be exhibited.

(4) In order to avoid the size balance of the pillar structure in order to avoid the influence of the slope fluctuation, it is necessary to individually design the dimensions of the materials constituting the pillar structure, and the processing or assembly of the materials becomes complicated.

(5) When the pillar structure is assembled, since the two pillars are bent, assembly is not easy.

The present invention has been made in view of the above points, and an object thereof is to provide a pillar structure and an impact absorption grid that satisfy at least one of the following.

(1) The pillar structure can exhibit the attenuation performance normally.

(2) Even at the scene where the slope is undulating, the vertical angle of the receiving surface of the protective net and the height of the grid can be kept constant.

(3) It is possible to effectively absorb the energy acting on the receiving surface of the protective net while avoiding damage to the pillar structure.

(4) Even if a bending force or a twisting force is applied to the pillar structure, it is not damaged.

(5) It is excellent not only for static loads such as snow pressure, but also for dynamic loads such as falling rocks and avalanches.

(6) The pillar structure is self-healing, and the impact absorption grid is excellent in repairability.

(7) It is possible to improve the workability and reduce the cost with the weight reduction of the impact absorption grid material.

In the pillar structure of the shock absorbing grid according to the first aspect of the present invention, the shock absorbing grid is provided with a barrier net at intervals, and is characterized in that it includes an axial force absorbing body, and the base end is fixed to the inclined surface to be vertically tilted. a deformation inducing body that is disposed in cross-over with the axial force absorber and that fixes the base end to the inclined surface And the first to third connecting members are respectively connected between the axial force absorber and the free end of the deformation inducing body, between the free end of the deformation inducing body and the base end of the axial force absorber, and the shaft Between the free end of the force absorber and the base end of the deformation inducing body; the axial force absorber is formed by a plurality of elastic rods at both ends; the deformation inducer is formed of a rigid material; and the first or second joining material is formed A part of the length adjusting device is attached to adjust the length of the first or second connecting member; and the axial force acting on the deformation inducing body is transmitted through the first to third connecting members to the axial force absorber.

Furthermore, in the pillar structure of the shock absorbing grid, a bundle plate is coupled between the free ends of the plurality of elastic rods, and the elastic rod is screwed to the nut to position the bundle plate, so that the position of the bundle plate can be along The elastic rod is displaced.

Further, the pillar structure of the shock absorption grid includes an anchor that fixes the base end of the axial force absorber and the deformation inducer, respectively.

The shock absorbing grid according to the second aspect of the present invention includes a plurality of pillar structures vertically disposed at intervals and a protective net that is stretched between the pillar structures, and is characterized in that any one of the pillar structures is used; The base end of the absorber is fixed to the valley side slope, and the base end of the deformation inducer disposed to intersect the axial force absorber is fixed on the mountain side slope to erect the pillar structure; and the pillar structures are formed adjacent to each other The upper end of the protective net is suspended between the free ends of the axial force absorber.

Further, in the shock absorbing grating, the lower side of the protective net is attached to the base end of the deformation inducing body, or the lower side of the protective net is fixed to the mountain side inclined surface.

In the present invention, "energy" includes not only dynamic loads such as falling rocks or avalanches, but also kinetic energy and potential energy generated by static loads such as snow pressure.

In the present invention, "elastic deformation" includes compression deformation in the longitudinal direction of the axial force absorber, distortion deformation in the longitudinal direction of the axial direction, and flexural deformation in various other directions.

According to the present invention, at least one of the following effects can be obtained.

(1) The pillar structure in which the axial force absorber of the flexible structure and the deformation inducer of the rigid structure are combined, the function of the member that transmits energy (deformation inducer, etc.) and the member that absorbs energy (axial force absorber) are clear .

Therefore, even if there is a slanting undulation, the pillar structures can exhibit the attenuation performance normally.

(2) Since the functions of the axial force absorber and the deformation inducer are clear, the calculation of the energy absorption amount of the entire pillar structure can be accurately performed, and the member corresponding to the function can be easily selected.

(3) Even if the inclined surface has an undulation, the length of the connecting material of the connecting material is adjusted to be the length of the connecting material, so that the vertical angle of the receiving surface of the protective net and the height of the grid can be kept constant.

(4) At the free end of the axial force absorber, by arbitrarily adjusting the height of the upper side of the protective net, the installation distance of the axial force absorber and the deformation inducer can be kept constant, and the protection net can be further properly maintained. The vertical angle of the face and the height of the grid.

(5) The elastic force is deformed to allow absorption while maintaining the erectability of the axial force absorber, and the energy acting on the receiving surface of the protective net can be effectively absorbed.

(6) Since the axial force absorber functions as a buffering function, damage of the deformation inducer and a plurality of connecting materials can be avoided, and the shock absorption grid can be avoided. Loss of function.

(7) The constituent members of the pillar structure can be simplified, and the production cost can be reduced.

(8) The elastic force absorber can be elastically deformed in various directions by forming the axial force absorber with a plurality of elastic rods. Therefore, even if the deformation force or the twisting force due to the load from the unintended direction can cause the stress to not excessively concentrate on the base end of the elastic rod and elastically follow the deformation.

(9) Since the weight of the axial force absorber and the deformation inducer which constitute the pillar structure can be reduced, the transportability and assembly property of the pillar structure to the site can be improved, and the workability can be improved and the cost can be reduced.

(10) Since the pillar structure is self-healing, the impact absorption grid is excellent in repairability.

(11) Not only static load such as snow, but also dynamic energy absorption performance even for dynamic loads such as falling rocks and avalanches.

Hereinafter, embodiments of the invention will be described with reference to the drawings.

(Example 1)

(1) Shock absorption grid

1 is a perspective view showing a shock absorbing grid of the present invention, FIG. 2 is a side view showing the pillar structure 10, and FIG. 3 is a model diagram showing the pillar structure 10 as viewed from the sloped valley side.

The shock absorbing grid of the present invention is formed between a plurality of pillar structures 10 disposed at intervals along the inclined surface 11 and between the pillar structures 10. The protective net 40 is constructed.

Further, in Fig. 1, reference numeral 18 denotes a singular or plural number of spare cords which are stretched between the pillar structure 10 at the end and the slope 11.

(2) pillar structure

The pillar structure 10 is a structure that has a function of absorbing and receiving the energy received by the surface 41 and a pillar function, and includes an axial force absorber 20 that is fixed to the valley side slope and erected to be swingable on the slope 11 The deformation inducing body 30 is disposed to intersect with the axial force absorbing body 20, and is fixed to the mountain side inclined surface and erected to be rotatable on the inclined surface 11; and the non-stretchable first to third connecting members 12 to 14, The respective ends of the axial force absorber 20 and the deformation inducer 30 and the respective ends of the axial force absorber 20 and the deformation inducer 30 are connected between the end and the base end (the inclined surface 11).

The angle of intersection between the axial force absorber 20 and the deformation inducing body 30 and the total length of each of the connecting members 12 to 14 are as follows, and even if the energy acting on the receiving surface 41 is dispersed and transmitted to the axial force absorber 20 and the respective connecting members 12 to At the same time, the axial force absorber 20 acts as an axial force.

Next, the details of the pillar structure 10 will be described in detail.

(2.1) Axial force absorber

The axial force absorber 20 is an elastic structure having a damper function that absorbs energy of the receiving surface 41 by compressive deformation, and is composed of a plurality of elastic rods 21 that restrict both end portions.

In the present embodiment, the case where the two elastic rods 21 and 21 constitute the axial force absorbing body 20 will be described. However, the number of the elastic rods 21 may be one or three or more.

The material of the elastic rod 21 can be applied to a metal material such as steel bar or spring steel or an elastic material such as a resin.

A thread is formed on the circumferential surface of the elastic rod 21 to adjust the hanging height of the upper side of the protective net 40.

(2.1.1) Structure of the base end side of the axial force absorber

As shown in FIG. 2 to FIG. 4, the base end of the elastic rod 21 is pivotally supported by the support bracket 24 of the grounding plate 23 by the support shaft 22, and the anchor 25 is placed on the grounding plate 23 to be fixed to the inclined surface 11 .

(2.1.2) Construction of the free end of the axial force absorber

As shown in FIGS. 2 and 3, a pair of upper and lower nuts 26, 26 are screwed to the free ends of the elastic rods 21.

Between the free ends of the plurality of elastic rods 21, a pair of upper and lower bundling plates 27, 27 are interposed, and the free ends of the two elastic rods 21, 21 are bundled to be inseparable.

The tube 28 and the bundling plates 27, 27 which are externally mounted on the upper portions of the elastic rods 21 are slidably movable while maintaining the restriction elastic rods 21, and the bundles of the upper and lower pair of nuts 26, 26 can be bundled up and down to be bundled. The positions at which the plates 27, 27 are placed are adjusted to an arbitrary height along the elastic rod 21.

Further, although each of the bundling plates 27, 27 and the tube 28 is an individual body, the lower bundling plate 27 and the tube 28 may have an integral structure.

The tube 28 at the upper portion of each of the elastic rods 21 is detachably attached to the end portion of the rope 15 on the protective net 40, and the upper ends of the first and third joining members 12, 14 are unseparably attached to the bundling plate 27. .

The means for adjusting the suspension height of the upper side of the protective net 40 is not limited to the nuts 26, 26, and can be applied to any position of the elastic rod 21 such as pin fixing or welding. A well-known positioning means for locating the bundling plate 27.

(2.2) deformation inducer

The deformation inducing body 30 intersects the axial force absorber 20 in a form between the elastic rods 21, 21 constituting the axial force absorber 20.

The deformation inducing body 30 is a rigid material having a function of inducing the energy acting on the receiving surface 41 as the axial force of the axial force absorber 20, and is formed of, for example, a steel pipe or the like.

In order to exert the above functions, the deformation inducing body 30 has a higher compressive strength than the axial force absorber 20.

(2.2.1) The pivotal structure of the base end of the deformation inducer

As shown in FIG. 2, the base end of the deformation inducing body 30 is pivotally supported by the support bracket 33 of the ground plate 32 by the support shaft 31, and the anchor 34 is placed on the ground plate 32 to be fixed to the inclined surface 11.

As shown in FIG. 5, the grounding plate 32 is erected to form the front connecting piece 32a to connect the lower end of the third connecting material 14, and the side connecting pieces 32b, 32b which are formed upright in the left-right oblique direction are connected and connected to the protective net 40. Below the lower rope 16,16.

(2.2.2) Free end of deformation inducer

As shown in Fig. 2, a projection 35 for hanging is protruded from the free end of the deformation inducing body 30, and one end of the first and second joining members 12, 13 which are attached to the free end of the deformation inducing body 30 can be positioned. The ring.

The mooring means of the first and second joining members 12, 13 is not limited to the projections 35, and a known mooring means can be applied.

(2.3) Connecting material

Each of the connecting members 12 to 14 can be made of, for example, a steel or fiber rope, a steel bar, a steel plate or the like which is excellent in tensile endurance.

The first connecting member 12 is connected between the free end of the axial force absorbing body 20 and the free end of the deformation inducing body 30, and the second connecting member 13 is connected between the free end of the deformation inducing body 30 and the proximal end side of the axial force absorbing body 20. The third connecting member 14 is connected between the free end of the axial force absorber 20 and the base end of the deformation inducing body 30.

Further, the first to third connecting members 12 to 14 may be formed by one continuous member.

In the present invention, since the axial force absorber 20 has a buffering function, the tension load of each of the connecting members 12 to 14 and the load of each of the anchors 25, 34 are smaller than in the related art.

In the present invention, a case where the length adjusting tool 17 capable of adjusting the length in the field is attached to the middle of the second connecting member 13 will be described.

The length adjusting tool 17 can be applied to a known adjusting device capable of withstanding tension in addition to a loose screw buckle or the like.

(3) Protective net

The protective mesh 40 is a structure having a receiving surface 41, including, for example, a gold mesh, or a rope mesh, or a combination of such well-known meshes.

Further, the protective net 40 may be divided into one span unit of the strut structure 10 in addition to the full length of the plurality of spans.

The protective net 40 is disposed on the mountain side inclined surface, and the upper side thereof is attached to the free end of the axial force absorbing body 20.

In this example, the upper side of the protective net 40 is mounted on the rope 15 between the free ends of the axial force absorber 20, and the lower side of the protective net 40 is mounted on the base end of the deformation inducer 30. Under the rope 16.

(assembly of shock absorbing grid)

Next, a method of assembling the shock absorbing grid will be described.

(1) Moving in the materials

The pillar structure 10 constituting the shock absorbing grid and the protective net 40 are carried into the site.

When the materials are loaded, the elastic rods 21 and the connecting members 12 to 14 of the steel rods constituting the pillar structure 10 are dismantled and reduced in weight to be transported by the operator. Therefore, it is easy to carry in the materials even if the site is a mountainous area.

(2) Assembly of pillar structures

An example of assembly of the pillar structure 10 will be described with reference to Figs. 1 and 2 .

After the grounding plates 23, 32 are attached to the anchors 25, 34 which are laid at intervals by the inclined faces 11, the heads of the respective anchors 25, 34 are fixed by nuts.

Next, the ground plate 23 on the lower side pivotally supports the base end of the axial force absorber 20 through the support shaft 22, and the ground plate 32 of the upper position pivotally supports the base end of the deformation inducer 30 through the support shaft 31.

The bundle plates 27, 27 and the tube 28 are attached to the free end of the axial force absorber 20 which intersects the deformation inducing body 30, and the nuts 26, 26 are screwed on both sides thereof.

Finally, the non-stretchable first to third connecting members 12 to 14 are respectively connected between the end of the axial force absorber 20 and the deformation inducing body 30 from the end and the base end, and the assembly of the strut structure 10 is completed.

Since the deformation-inducing body 30 does not deform even if the axial force absorber 10 is deflected, the assembly work of the three members 20 and 30 intersecting the three-dimensional assembly of the pillar structure 10 is facilitated.

Furthermore, since the axial force absorber 20 and the deformation inducer can be manually performed Since the work of erecting 30 is performed, the assembly of the pillar structure 10 does not require a crane or the like.

(3) Assembly of protective nets

A string 15 is placed between the tops of the adjacent pillar structures 10, that is, between the upper portions of the axial force absorbers 20. The lower rope 16 is placed between the lower portions of the adjacent pillar structures 10, that is, the ground plates 32 at the base ends of the deformation inducers 30.

The upper and lower sides of the protective net 40 are installed between the upper and lower ropes 15, 16 so as not to be separated, respectively, and the assembly of the shock absorbing grid is completed.

In Fig. 2 showing the completed shock absorbing grid, the weight of the axial force absorber 20 which is poured on the side of the slope is transmitted through the connecting members 12, 13 and supported by the inclined surface 11 and the rigid deformation inducing body 30.

The weight of the deformation inducing body 30 that is tilted on the side of the slope is transmitted through the connecting members 12 and 14 to the inclined surface 11 and the axial force absorber 20.

The weight of the protective net 40 is transmitted and supported by the inclined surface 11 and the rigid deformation inducing body 30 through the axial force absorber 20 and the connecting members 12 and 13.

As described above, the axial force absorber 20 and the deformation inducer 30 constituting the pillar structure 10 are balanced in weight to maintain a stable posture.

(corresponding method of the undulation of the slope)

In order to achieve the catching function of the original rockfall or the like, the impact absorbing grille maintains the erecting angle of the receiving surface 41 of the protective net 40 constant, and seeks to sufficiently ensure the height (grid height) of the receiving surface 41 of the protective net 40.

When the dimension length of each member constituting the pillar structure 10 is a predetermined size (fixed size), it is affected by the undulation of the slope 11 and the bearing surface 41 cannot be made. The erect angle (relative to the horizontal or vertical angle) and the grid height remain constant.

Therefore, in the present invention, when the pillar structure 10 is provided on the inclined surface 11 having the undulation, it corresponds to the following method.

(1) Correspondence method 1

Fig. 6 is a model diagram showing a pillar structure 10 of a desired size balance.

In the same figure, the mounting distance (inclination distance) between the axial force absorber 20 and the base end of the deformation inducing body 30 is L, the grid height of the protective net 40 is H, the total length of the first connecting material 12 is x, and the second In the case where the total length of the connecting material 13 is y, in the corresponding method, the total length of the axial force absorber 20 and the deformation inducing body 30, the height H of the protective net 40, and the total length x of the first connecting material 12 do not change. The corresponding law for the premise.

Fig. 7(A) shows a state in which the inclined surface 11 is excessively inclined rearward (or frontward) at an angle of the gradient θ ₁ as compared with the reference gradient of Fig. 6, and (B) of Fig. 7 shows the inclined surface 11 The state in which the reference gradient of FIG. 6 is reversed backward (or front down) is reversed at the angle of the gradient θ ₂ .

7 of (A), when the lower inclined surface 11 later, in order to avoid excessive protective net 40 toward the inclined surface of the pouring valley side, from the base end of the mounting structure 10 of the pillar L ₁ becomes shorter.

If only the installation distance L ₁ becomes shorter, the overall dimensional balance is lost.

Therefore, by extending the operation adjuster 17, the entire length y1 of the second connecting member 13 is lengthened, and the overall good dimensional balance can be maintained.

The 7 (B), when the back above the ramp 11, in order to avoid excessive protective net 40 toward the inclined surface of the mountain-side dumping, the base end of the pillar structure 10 is mounted a distance L ₂ becomes long.

If only the installation distance L ₂ becomes longer, the overall dimensional balance is lost.

Therefore, by using the adjusting tool 17, the entire length y2 of the second joining material 13 is shortened, and the overall good dimensional balance can be maintained.

In the present correspondence method, the shape of the triangle formed by the three sides of the protective net 40, the first connecting member 12, and the deformation inducing body 30 and the length of each side are not changed.

As described above, only the operation of adjusting the total length y of the second connecting member 13 in accordance with the gradient of the inclined surface 11 at the site is maintained, that is, the desired dimensional balance can be maintained, and the vertical angle of the receiving surface 41 and the gate height are kept constant.

(2) Correspondence method 2

Fig. 8 is a model diagram showing a pillar structure 10 of a desired size balance.

In the present correspondence method, the total length of the axial force absorber 20 and the deformation inducer 30, the height H of the shield 40, and the total length x of the first connecting member 12 do not change as in the above-described corresponding method 1, but the corresponding method is The installation distance L of the axial force absorber 20 and the deformation inducer 30 is not changed.

The axial force absorber 20 used in the present correspondence method is constituted by an elastic rod having a longer overall length than the corresponding method 1, and an excess length portion 20a is formed at a free end portion of the axial force absorber 20, and the nut 26 is rotated. The operation can adjust the hanging height of the upper side of the protective net 40 arbitrarily.

The excess length portion 20a refers to a section from the screwing position of the nut 26 to the distal end of the axial force absorbing body 20, and the length of the excess length portion 20a is changed by shifting the screwing position of the nut 26.

As shown in FIG. 9(A), when the inclined surface 11 is turned rearward and downward, in order to prevent the protective net 40 from falling toward the inclined valley side, the extending operation adjuster 17 lengthens the entire length y1 of the second connecting member 13, and absorbs the axial force. Nut 26 on body 20 to the front end The side displacement, whereby the vertical angle of the receiving surface 41 and the grid height can be kept constant.

As shown in FIG. 9(B), when the inclined surface 11 is rearward and upward, in order to prevent the protective net 40 from falling to the slope side, the operation adjuster 17 is shortened to shorten the entire length y2 of the second connecting member 13, and the axial force absorber is made. The nut 26 on the 20 is displaced toward the proximal end side, whereby the vertical angle of the receiving surface 41 and the height of the gate can be kept constant.

In the present correspondence method, the shape of the triangle formed by the three sides of the protective net 40, the first connecting member 12, and the deformation inducing body 30 and the length of each side are also unchanged.

In the corresponding method, the axial force absorbing body 20 can be operated by adjusting the operation of adjusting the full length y of the second connecting member 13 and adjusting the position of the nut 26 on the axial force absorbing body 20 in accordance with the gradient of the inclined surface 11 of the installation site. The mounting distance L with the deformation inducing body 30 is kept constant while maintaining a desired dimensional balance, and the vertical angle of the receiving surface 41 and the grid height are kept constant.

The above-mentioned corresponding methods 1 and 2 are used or used in combination depending on the situation at the site.

(Energy absorption of the shock absorption grid)

Next, the absorption mechanism of the energy of the shock absorbing grid will be described with reference to FIG.

(1) Flexural deformation of the protective net

If the energy acts on the receiving surface 41, the protective net 40 is flexibly deformed toward the sloped valley side, and one part of the energy is attenuated due to the deflection deformation of the protective net 40.

(2) Non-compressive deformation of the deformation inducer

The axial force absorber 20 is rotated clockwise around the base end, and tension is generated in the first and second connecting members 12, 13.

In the first and second connecting members 12, 13, the deformation inducing body 30 which is tilted toward the slope of the inclined surface acts as an axial force, but is supported by the deformation inducing body 30 because the rigidity is not compressed and deformed.

(3) The dumping limit of the deformation inducer

Further, the free end of the deformation inducing body 30 is supported by the second connecting member 13 connected to the inclined surface 11 and the first connecting member 12 connected to the free end of the axial force absorbing body 20, and the tilting angle of the deformation inducing body 30 is hardly The tilting of the deformation inducing body 30 is restricted.

Therefore, the energy acting on the deformation inducing body 30 can be induced toward the axial force absorber 20.

(4) Swivel restriction of axial force absorber

Simultaneously, the axial force absorber 20 is rotated clockwise around the base end to generate tension at the first and second joining members 12, 13.

The tension acting on the first and second joining members 12, 13 is finally supported by the anchor 25, and the clockwise rotation of the axial force absorbing body 20 is restricted.

(5) Compression deformation of axial force absorber

The resultant force of the tension generated by the protective net 40 and the tension generated by the first and second joining members 12, 13 acts on the axial force absorbing body 20 as an axial force.

If the axial force generated in the axial force absorber 20 exceeds its deformation strength, the axial force absorber 20 undergoes compression deformation.

The energy is effectively absorbed by the compression deformation of the axial force absorber 20.

In particular, since the energy absorbing member is only the axial force absorbing body 20, the energy absorption performance is easily calculated, and stable energy absorbing performance can be exhibited.

Further, even if a large amount of energy acts, the axial force absorber 20 acts as a buffer to prevent the breakage of the first and second joining members 12, 13 and the deformation of the deformation inducing body 30, so that the shock absorbing grating is not suddenly lost. The function.

Moreover, even if the bending force or the twisting force of the inclined surface 11 is applied to The axial force absorbing body 20, which constitutes the elastic rod 21 of the axial force absorbing body 20, is only bent or deformed by bending, and the bending force or the twisting force does not act on the base end of the elastic rods 21, 21.

Therefore, even if a bending force or a twisting force acts on the axial force absorber 20, it will not be broken.

As described above, the shock absorbing grid of the present invention transmits only the energy received by the protective net 40 as an axial force to the axial force absorbing body 20, and is transmitted as a tensile force to the backup material, that is, the connecting members 12, 13, and can act on the shaft. The axial force absorber 20 is compression-deformed to effectively absorb energy in a state where the axial force of the force absorber 20 is maintained in an erect state.

Further, since the pillar structure 10 has a buffering function, the tension load of each of the connecting members 12, 13 and the load on each of the anchors 23, 34 can be reduced.

(6) After the elimination of energy

When the cause of the energy disappears from the protective net 40 (the receiving surface 41), the axial force absorbing body 20 constituting the pillar structure 10 returns to the original standby position due to its own elastic restoring force.

As the pillar structure 10 is restored, the fence 40 is also pulled up to its original position.

Therefore, the state before the energy action can be maintained, and the function of the shock absorption gate can be maintained.

For example, when the cause of the energy is snow pressure, if the snow melts, the axial force absorber 20 naturally returns to the original position. Therefore, the function of the shock absorbing grid can be constantly exerted without applying special treatment.

The axial force absorber 20 or the deformation inducer 30 constituting the pillar structure 10 Even if it is deformed or damaged, the damaged materials can be replaced simply and in a short time.

(Example 2)

In the first embodiment, the form in which the lower side of the protective net 40 is fixed to the base end of the deformation inducing body 30 will be described.

The protective net 40 is suspended at the free end of the axial force absorber 20, and the weight balance can be obtained to maintain the stable posture of the pillar structure 10. Therefore, the lower side of the protective net 40 can be fixed to the mountain side slope.

By fixing the lower side of the protective net 40 to the mountain side slope, compared with the first embodiment, the length of the inclined surface of the protective net 40 can be lengthened, and the amount of flexural deformation of the protective net 40 can be increased, thereby having energy absorption performance. The advantage of high.

(Example 3)

In the first and second embodiments, the length adjusting device 17 may be attached to the second connecting member 13, but the length adjusting device 17 may be attached to the first connecting member 12.

Alternatively, as shown in FIG. 11, the length adjusting device 17 may be attached to the first connecting member 12 and the second connecting member 13, or the length adjusting device 17 may be attached to all of the connecting members 12 to 14.

By increasing the number of mountings of the length adjuster 17, the angle at which the axial force absorber 20 and the deformation inducing body 30 are set can be individually adjusted in accordance with the undulation of the slope 11.

Further, in combination with the second embodiment, it is easy to carry out the installation work of keeping the vertical angle of the receiving surface 41 and the gate height constant even in the presence of the undulations of the slanting surface 11 .

10‧‧‧ pillar structure

11‧‧‧Bevel

12‧‧‧First connecting material

13‧‧‧Second connecting material

14‧‧‧ Third connecting material

15‧‧‧On the rope

16‧‧‧Lower rope

17‧‧‧ Length adjustment tool

18‧‧‧ spare rope

20‧‧‧ Axial force absorber

20a‧‧‧Yu Changbu

21‧‧‧Flexible rod

22‧‧‧ fulcrum

23, 32‧‧‧ Grounding plate

24‧‧‧Support bracket

25‧‧‧ Anchor

26‧‧‧ Nuts

27‧‧‧Bundle plate

28‧‧‧ tube

30‧‧‧ deformation inducer

31‧‧‧ Support shaft

32a‧‧‧ Front connecting piece

32b‧‧‧Side side piece

33‧‧‧Support bracket

34‧‧‧ Anchor

35‧‧‧ Protrusion

40‧‧‧Protective net

41‧‧‧

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a perspective view of a shock absorbing grid omitting a portion of the present invention.

Fig. 2 is a side view of the pillar structure of the first embodiment.

Fig. 3 is a model diagram of a pillar structure viewed from a sloped valley side.

Figure 4 is an enlarged view of the base end of the axial force absorber.

Fig. 5 is an enlarged view of the base end of the deformation inducing body.

Figure 6 is a model diagram of an ideal pillar structure.

Fig. 7 is an explanatory view showing a method of providing a pillar structure on a slope having an undulating slope, wherein (A) is a model diagram of a pillar structure provided in a sloped direction to the lower rear side, and (B) is a slope surface provided in a rearward upper direction. A model diagram of the pillar structure.

Fig. 8 is a model diagram of an ideal pillar structure having an excess length portion.

Fig. 9 is an explanatory view showing a method of providing a pillar structure on a slope having an undulating slope, wherein (A) is a model diagram of a pillar structure in a case where a slope is formed in a backward direction, and (B) is a slope surface provided in a rearward upper direction. A model diagram of the pillar structure.

Figure 10 is a model diagram of an impact absorption grid when energy is applied.

Figure 11 is a side view of the pillar structure of the third embodiment.

10‧‧‧ pillar structure

11‧‧‧Bevel

12‧‧‧First connecting material

13‧‧‧Second connecting material

14‧‧‧ Third connecting material

17‧‧‧ Length adjustment tool

20‧‧‧ Axial force absorber

21‧‧‧Flexible rod

22‧‧‧ fulcrum

23‧‧‧ Grounding plate

24‧‧‧Support bracket

25‧‧‧ Anchor

26‧‧‧ Nuts

27‧‧‧Bundle plate

28‧‧‧ tube

30‧‧‧ deformation inducer

31‧‧‧ Support shaft

32‧‧‧ Grounding plate

33‧‧‧Support bracket

34‧‧‧ Anchor

35‧‧‧ Protrusion

40‧‧‧Protective net

41‧‧‧

Claims (9)

A pillar structure for a shock absorbing grid, wherein the shock absorbing grid is provided with a barrier net at intervals, and is characterized in that: an axial force absorber is provided, and the base end is fixed to the slope and erected to be tilted; the deformation inducer, Interlacing with the axial force absorber, and fixing the base end to the inclined surface to be vertically tilted; and the first to third connecting materials respectively connecting between the axial force absorber and the free end of the deformation inducing body, and deforming Between the free end of the inducer and the base end of the axial force absorber, and between the free end of the axial force absorber and the base end of the deformation inducer; the axial force absorber is formed by a plurality of elastic rods at both ends; Forming the deformation inducing body with a rigid material; attaching a length adjusting device to one of the first or second connecting members to adjust a length of the first or second connecting member; and transmitting an axial force acting on the deformation inducing body The first to third joining materials are induced to the axial force absorber. The pillar structure of the shock absorbing grid of claim 1, wherein the bundle is coupled between the free ends of the plurality of elastic rods, and the elastic rod is screwed to the nut to position the bundle, so that the bundle is The set position can be displaced along the elastic rod. The pillar structure of the impact absorption grid according to the first aspect of the invention is characterized in that the anchor structure of the axial force absorber and the base end of the deformation inducer are respectively fixed. An impact absorption grid having a plurality of pillar structures erected at intervals a protective net stretched between the body and the pillar structure, characterized in that: the pillar structure of the first application patent scope is used; the base end of the axial force absorber is fixed to the valley side slope, and the shaft is The base end of the deformation inducing body in which the force absorber is disposed is fixed on the mountain side slope to erect the pillar structure; and the protective net is suspended between the adjacent free ends of the axial force absorbers constituting the pillar structures Above. The impact absorption grid of claim 4, wherein the lower side of the protective net is attached to the base end of the deformation inducing body. For example, in the impact absorption grid of claim 4, the lower side of the protective net is fixed on the mountain side slope. An impact absorption grid comprising a plurality of pillar structures vertically arranged at intervals and a protective net stretched between the pillar structures, wherein the pillar structure of the second application patent scope is used; The base end of the body is fixed to the valley side slope, and the base end of the deformation inducer disposed to intersect the axial force absorber is fixed on the mountain side slope to erect the pillar structure; and adjacent to the pillar structure The upper end of the protective net is suspended between the free ends of the axial force absorbing body; the installation position of the bundling plate is adjusted along the elastic rod to adjust the installation height of the upper side of the protective net. The impact absorption grid of claim 7, wherein the lower side of the protective net is attached to the base end of the deformation inducing body. For example, the impact absorption grid of claim 7 of the patent scope, wherein The bottom of the net is fixed on the side slope of the mountain.