JP3493619B2 - Buffer type guard fence and skeleton for it - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protective fence which is continuously installed on a road surface along a traveling direction of a vehicle, and more specifically, a buffer body which absorbs a shock at the time of a vehicle collision is provided at the bottom of the protective fence. The present invention relates to a buffer type guard fence provided and a frame for it.

[0002]

2. Description of the Related Art Usually, a protective fence is laid on the roadside or the median strip of a road to allow a vehicle to cross the roadside or to leave the road.
It prevents entry into the oncoming lane beyond the median strip. Conventionally, a rigid protective fence laid for the above purpose (mainly,
(Made of concrete), in the end face shape, the lower both sides are formed into a gradually sloping downward sloping slope, and the upper both sides connected to the gently sloping slope are steeply sloping and the length is long. So-called New Jersey type (NJ type)
There is also a type such as Florida type (F type), and such a rigid protective fence is laid integrally with the foundation concrete provided on the ground surface. In such a conventional protective fence, since the rigid wall body stands upright from the ground surface, when the vehicle collides with the protective fence, the impact force acts as a concentrated load at the collision point. To work. Therefore, the impact force becomes extremely large, the damage of the vehicle is significant, the human life is also endangered, and the fragments of the vehicle and concrete are scattered on the roadway, obstructing the traffic of other vehicles and causing a secondary accident. Had the problem.

In order to eliminate such inconvenience, Japanese Unexamined Patent Publication No. 10-110413 discloses that a semicircular recess is provided in the longitudinal direction (vehicle traveling direction) on the bottom surface side, and both side portions are provided with legs. On the road surface where the fence main body is installed, a supporting portion having a semi-circular convex portion that engages with the concave portion is formed on the road surface side where the fence main body is installed. When installing the fence main body, a cushioning concrete protective fence is proposed in which the concave portion and the convex portion are engaged with each other and a cushioning material is provided in the gap formed between both legs of the fence body and the supporting portion over the longitudinal direction. Has been done.

[0004]

However, in the above-mentioned protective fence, since the concave portion of the fence main body and the convex portion of the supporting portion are in concave and convex engagement with each other in a surface contact state, the impact at the time of a vehicle collision is generated. When the force is small, the fence main body may not rotate due to the weight of the fence main body and the frictional resistance in the surface contact state increasing.
At this time, the impact force due to the collision is not reduced as in the case of the conventional rigid protective fence. On the other hand, when the fence body rotates due to the impact force and its legs reach the upper surface of the support portion (see Fig. 2 of the publication).
If an impact force further acts on the fence main body to rotate it, there is a risk that the rotation cannot be prevented and the fence main body falls. Then, a method of holding both legs of the fence main body with anchor bolts in order to prevent the fall is proposed,
Holding both legs slows down the operation of the fence body in combination with the large frictional resistance between the concave and convex portions, and as a result,
There was a problem that it was inferior in the impact force mitigation ability at the time of a vehicle collision.

The present invention has been made in view of the above-mentioned conventional problems, and in a rigid protective fence having a cushioning body, by optimizing the shape of the bottom part thereof, the impact force at the time of a vehicle collision is obtained. It provides a highly safe buffering fence and a frame for it, which has excellent mitigation ability to prevent damage to the collision vehicle and driver's injury, and has a high ability to restore the original condition after the collision vehicle retreats. This is an issue.

[0006]

[Means for Solving the Problems] As a means for solving the above problems, a shock-absorbing protective fence 1 according to claim 1 of the present invention.
Is a protection fence installed on the road surface along the traveling direction of the vehicle, by providing a cushioning member at the lower part of the skeleton 1a whose side wall located on the vehicle running side is the vehicle wall surface 6, and in the protection fence installed on the road surface along the traveling direction of the vehicle. The support part 30 provided between 11 is contact | abutted to the bottom part 3 and one or both of the foundation concrete 11 in a non-fitting state, It is characterized by the above-mentioned. Further, in the cushioning type protective fence 1 of the present invention, as described in claim 2, the bottom portion 3 is formed as a straight or bent line or curved upward surface 3a toward at least one of the side wall directions. The bottom portion 3 that is continuously provided with the surface 3a, or the most protruding portion of the upward surface 3a is the support portion 30.
It is something to say. On a road in which a large number of cushioning type protective fences 1 having the above-mentioned structure are installed on the foundation concrete 11 and which are continuously arranged along the traveling direction of the vehicle, the vehicle is erroneously placed against the vehicle. When colliding with the wall surface 6, the impact force causes the skeleton body 1a to tilt toward the side opposite to the vehicle collision side, and the cushioning body made of an elastic body provided at the lower portion of the skeleton 1a is compressed between the foundation concrete 11 and elastic deformation. The impact force is absorbed and relaxed by raising and contracting. At this time, the support portion 30 and the bottom portion 3 and / or the foundation concrete 1
The pivotable structure having the contact portion with 1 as a fulcrum reduces the mutual contact area and resistance, and makes it easy to tilt the body 1a toward the side wall, so that the impact force can be absorbed and alleviated more efficiently. It is possible to prevent the damage of the collision vehicle and the injury of the driver. Further, since the weight of the entire protective fence is supported by the support portion 30, the load on the buffer body is reduced at all times, and the fatigue and deterioration of the buffer body made of an elastic body are prevented. Further, after the impact force is retracted, even when the frame 1a is pushed back toward the vehicle collision side due to the elastic repulsion of the buffer body that is compressed and deformed, the support part 30 that can rotate the frame 1a and reduce mutual contact resistance. By the presence of, the protective fence can be smoothly raised and restored to its original state.

The buffer type protective fence 1 of the present invention is the buffer type protective fence 1 according to claim 1 or 2, wherein a void 12 is formed in the lower part of the frame 1a. . In the buffer type guard fence 1 having such a configuration,
By providing the space 12 below the bottom portion 3, the contact area and resistance between the bottom portion 3 and the support portion 30 and the cushioning body made of an elastic material located at the lower portion and the side portions thereof are reduced, and therefore, the wall surface 6 against the vehicle is affected. With respect to the impact force, the ability to tilt in the side wall direction is excellent, and a large impact force can be absorbed and alleviated, and the body 1a can be quickly returned to the original state.

The cushioning type protective fence 1 of the present invention is, as described in claim 4, connected to the concrete foundation 11 on at least a part of the bottom portion 3 of the cushioning type protective fence 1 according to any one of claims 1 to 3. The connecting member 5 is provided. Buffer type protective fence 1 having such a configuration
When installed by being connected to the basic concrete 11 by the connecting member 5, the elasticity and toughness of the connecting member 5 assist absorption and relaxation of impact force by the cushioning member and the restoring action of the protective fence to the original state, and Even with an extreme impact force, the strong fastening force of the connecting member 5 allows the skeleton 1a and the foundation concrete 11 to be integrated with each other to prevent the protective fence from moving or falling.

According to a fifth aspect of the buffer-type protective fence 1 of the present invention, one of the wall surfaces 6 of the buffer-type protective fence 1 according to any one of claims 1 to 4 is formed as a face 9. The end face of the body 1a is formed in a substantially L shape. According to the cushioning type guard fence 1 having such a configuration, it is possible to form the vehicle wall surface 6 side as a roadway and the other facing surface 9 side as a sidewalk, a bicycle path, etc., and also to secure traffic safety on the roadside. Can be secured.

According to a sixth aspect of the present invention, there is provided a frame 1a for a buffer type protective fence, wherein a bottom portion 3 of the frame 1a is provided on both side surfaces of the frame 1a.
It is formed on the bent surface or a curved surface projecting downwardly convexly Ri cotton in the width direction serving as the sidewall direction extending between, and is characterized in that formed between the supporting portion 30 of the protruding section of該屈curved or curved surface . In the skeleton 1a having such a configuration, the most projecting portion of the bottom portion 3 formed by the above surface shape forms the support portion 30 that abuts the basic concrete 11 in a non-fitting state, and therefore acts on the vehicle wall surface 6. There is an advantage that the frame 1a is easily tilted in the side wall direction against the impact force.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Each embodiment of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 (a) to 1 (c), reference numeral 1 denotes a buffer type protective fence according to an embodiment of the present invention. Hereinafter, the buffer type protective fence 1 will be described in the length direction ((a) in FIG. The left-right direction in (b)) is referred to as the road direction, and the direction across both side surfaces , that is, the width direction (the left-right direction in FIG. 5C) is referred to as the sidewall direction. The buffer type guard fence 1
The frame 1a is made of a rigid body (mainly made of concrete) and is installed along the traveling direction of the vehicle (road direction) and as the median strips of the road surface are brought into contact with the connecting walls 7 to each other. Has a side wall 2 at the lower end thereof and has a gradually sloping downward gradual slope, and the upper surface of the slope that is continuous with the gentle slope is a steep slope. It is provided in. The lower surface of the skeleton 1a, it bottom 3 of the road direction central portion, over the side wall direction, immediately
The upper surface 3a is curved and convex over the width direction, and the bottom portions 3 on both sides in the road direction are flat surfaces having straight upward surfaces 3a on both sides. A cushion material 4 as a substantially L-shaped cushioning member along the side wall portion 2, the upward surface 3a and the flat bottom portion 3 (a part) is provided on both sides except for the strip shape in the road direction, and The road surfaces R on both sides are set at a position lower than the upper surface of the rising portion 4a of the cushioning member 4, the upper end of the end portion 4b thereof is exposed to the outside, and the entire convex surface is a curved upward surface 3a. The most projecting portion of the bottom portion 3 forming the is the support portion 30 that partially contacts the surface of the basic concrete 11. Examples of the material of the cushioning material 4 forming the cushioning body include rubber chips made from waste vulcanized rubber generated in the production process of rubber products, waste tires, recycled tires, etc., and a binder of polyurethane prepolymer having terminal isocyanate groups. Examples thereof include regenerated rubber compounds obtained by blending and, and elastically deformable products such as synthetic resin products.

Next, a description will be given of the operation when the vehicle collides against the vehicle wall surface 6 of the buffer type protective fence 1 from the left side and the impact force acts on the skeleton 1a. The skeleton 1a that has received the impact force is tilted to the right, the cushion material 4 provided between the bottom 3 on the right side and the concrete foundation 11 is elastically deformed by compression and contracts, and the elastic deformation causes repulsion. Power is generated. Thus, right after the collision, the cushion material 4 on the right side
Compressively deforms to absorb and alleviate the impact force, and after the impact force has retracted, the repulsive force associated with the compression deformation pushes the body 1a back to the left side, causing the left cushion material 4 to elastically deform due to compression. By repeating the compression and repulsive motions of contracting on both sides of the cushion material 4, the body 1a returns to the state before the collision. In the cushioning type protective fence 1 having such a structure, since the weight of the entire skeleton 1a is supported by the supporting portion 30 that is in contact with the surface of the foundation concrete 11, the cushioning member 4 is always provided.
The cushioning member 4 made of an elastic body is prevented from being fatigued and deteriorated due to a reduced load applied to the cushioning member 4. Further, in the event of a vehicle collision, a structure in which the contact portion between the support portion 30 and the foundation concrete 11 is a fulcrum can be rotated. The space 12 formed between the bottom portion 3 and the foundation concrete 11 reduces the resistance of the skeleton 1a when it is tilted, so that the skeleton 1a can move more easily in the left-right direction. Further, in the cushioning material 4 forming the cushioning body, the impact absorbing force is absorbed and relaxed on both sides of the bottom portion 3 where a large compression or tensile force is generated due to the tilting of the body 1a to restore the body 1a to the original state. In addition, since the buffer body in the central portion in the side wall direction of the bottom portion 3 is omitted, the material used can be reduced and the structure can be made inexpensive. Further, the rising portion 4a of the cushion material 4
Is between the side wall portion 2 of the skeleton 1a made of a rigid body and the road material r forming the road surface R to avoid contact between the two and to assist the leaning and rebounding of the skeleton 1a by its elastic force. Furthermore, as shown in FIGS. 1A and 1B, if the cushion material 4 is provided between the connection walls 7,
It is possible to absorb and damp the impact force that is transmitted to the frame 1a adjacent to the frame 1a that has received the impact force, and as shown in the left part of the figure, a groove 15 is vertically provided in the connection wall 7. When the cushion material 4 is fitted in the concave and convex portions, the body 1a
Since the integrity with each other can be increased, the safety as a series of separators can be further improved.

FIGS. 2 (a) to 2 (e) show a buffer type protective fence 1
Another embodiment is shown, and the cushion material 4 as a cushioning body according to the embodiment is formed in a substantially L-shape with an end surface shape having a rising portion 4a at an end portion 4b on the road surface R side, It is provided on both sides of each bottom portion 3 of the frame 1a having both sides in the side wall direction as the vehicle wall surface 6 or having the vehicle wall surface 6 on one side and the other side as the face 9 and the end face shape being substantially L-shaped. In addition, except for FIG. 1D, a void 12 is formed between the bottom portion 3 and the upper surface of the foundation concrete 11. Further, the cushioning type protective fence 1 includes one having a supporting portion 30 which can be raised at the lower portion thereof and one having a connecting member 5 which is connected to the base concrete 11 at the bottom portion 3. (A) is an L type that covers the bottom portion 3 and the side wall portion 2 on which the cushion material 4 intersects at right angles, and the substantially central portion of the flat bottom portion 3 swells in a substantially arcuate cross section. It is in contact with the support portion 30 of. Also, the one shown in FIG.
A support portion 30 having a substantially trapezoidal cross section, which is integrally projected from the bottom portion 3 and is in contact with the upper surface of the basic concrete 11, is provided at a substantially central portion of the. In addition, as shown in FIG. 3C, an anchor bolt as a connecting member 5 which is erected from the support portion 30 formed by bulging the upper surface of the basic concrete 11 in a substantially arcuate cross section is attached to the body portion of the body 1a. By inserting the through hole 8 provided in the lower surface of the through hole 8'through and screwing with a nut, the substantially central portion of the flat bottom portion 3 and the upper surface of the supporting portion 30 are in contact with each other. Is. Here, the upper surfaces of the rising portions 4a of the cushion members 4 located on both sides of the bottom portion 3 are formed into arcuate surfaces that descend from the upper ends of the side wall portions 2 toward the road surface R side. Further, FIG. 9D shows another embodiment of the skeleton 1a, in which one wall surface in the side wall direction is formed in the face 9 which is gradually opened downward, and the vehicle wall surface 6 is formed in the other one side. As a result, the skeleton 1a has a substantially L shape, and a support portion 30 having a substantially trapezoidal cross section is provided at a substantially central portion of the bottom portion 3 and a bottom portion is provided with a substantially L-shaped cushion member 4 so as to sandwich the support portion 30. 3 and the base concrete 11 are filled with each other so that the lower surface of the supporting portion 30 and the upper surface of the basic concrete 11 are brought into contact with each other, and the connecting member 5 that is planted in the supporting portion 30 is a fixing material in a blind hole on the upper surface of the basic concrete 11. The shock-absorbing protective fence 1 is connected to the vehicle by means of 14, and is installed on the road side of the road, and the side facing the car 9 becomes a sidewalk, a bicycle path, etc. Prevent. Here, the cushion material 4 is formed by filling the space between the bottom portion 3 and the basic concrete 11 on both sides of the support portion 30. However, the aspect of the cushion material 4 is an example, and a space is provided on one side or both sides of the support portion 30. It is also possible to form 12.
It should be noted that the supporting portion 30 that abuts the bottom portion 3 in FIG.
Is integrally bulged from the upper surface of the basic concrete 11, but in place of this structure, the support portion 30 can be separately embedded as shown by the broken line in the basic concrete 11 of the figure. In addition, instead of the bottom portion 3 or the support portion 30 integrally projecting from the foundation concrete 11 shown in the above-described embodiments, as shown in FIG. 8E, between the flat bottom portion 3 and the top surface of the foundation concrete 11. It is also possible to adopt a configuration in which the support portion 30 made of a tubular body having an arbitrary shape is separately interposed. In addition, as shown in FIGS. 3 (a) and 3 (b), the shape of each supporting portion 30 in the road direction is arbitrarily provided at a desired position.
The number of installations and the like are not limited (the same applies to the support portion 30 and the connecting member 5 shown in FIGS. 2A and 2C). Since the connecting member 5 in the cushioning type protective fence 1 has elasticity and toughness, it assists the cushioning member 4 to absorb, mitigate, and repel the impact force at the time of a vehicle collision, and when the impact force is extremely large. The upper half of the connecting member 5 is the body 1a
By bending with it, it absorbs the impact.

The end view substantially L shown in FIG.
Another example of the installation of the buffer-type guard fence 1 using the frame-shaped body 1a will be described. The body 1a formed in an end view substantially L-shape.
Two are used, and they are separated from each other and arranged in parallel,
By filling the space in the space formed between the faces 9 by connecting the faces 9 to each other and connecting them to the foundation concrete 11, and by planting trees on the soil, a median strip having a green belt is constructed. Is. In such a shock-absorbing protective fence 1, the swelling portion 13 at the upper end of the wall surface 6 against the vehicle can return the exhaust gas of the vehicle to the side of the roadway to avoid direct hits on the trees and directly fill the filled soil. If a water retention material is provided on the face 9 that is continuous with the ground, the soil will be kept in an appropriate moisture state, and if a heat insulation material is provided, the conduction heat from the body 1a that has become hot due to sunlight or exhaust gas Because it is blocked and its dryness is prevented, the trees are always prosperous without dying, and the greenery can relieve the eyestrain of the driver. Further, in addition to the effect of the cushioning material 4, the filled soil receives the impact force acting on the skeleton 1a, absorbs and alleviates the impact force, and also has the effect of pushing the skeleton 1a back to the roadway side. And the ability to return to the original state will be exhibited. When installing the water retaining material, the end of the cushion material 4 on the face 9 side is brought into contact with the lower portion of the water retaining material, and the cushion material 4 is formed of a porous material or the like so as to have water permeability. For example, the surface water of the road surface R can be absorbed on the side of the rising portion 4a, and its water-permeable function can replenish water to the water-retaining material abutting on the surface 9 side. Here, if the lower surface of the cushion material 4 is formed as a downward surface toward the face 9 side, a water flow gradient to the water retaining material is obtained, and more efficient water supply can be performed. Further, even if the water retaining material is not provided, if the cushion material 4 is provided with the water permeable function, the surface water on the road surface R will be directly supplied to the filled soil 16. Furthermore, if a space is formed between the face 9 of the body 1a having a substantially L-shape in the end view and between other structures, and soil is filled to plant trees, a green belt can be constructed on the roadside.

FIGS. 4 (a) to 4 (c) show a buffer type protective fence 1
2 shows another embodiment, in which the flat bottom portion 3 of the body 1a is
The support 1 has a substantially chevron shape and is in substantially point contact with the top of the support 30 protruding from the upper surface of the foundation concrete 11, and the skeleton 1a is rotatable through the cushioning material 4 as a buffer. The aspect of 30 in the road direction is formed to have a required length at a required location, and the cushion material 4 is located in the remaining portion, that is, the portion where the bottom portion 3 and the support portion 30 do not come into contact with each other. This is for connecting itself between the end portions 4b, and in short, the cushion material 4 in the cushioning type protective fence 1 has a substantially ladder-like shape with its central portion interrupted as shown in FIG. Will be things.

Next, the case where the cushioning material 4 forming the cushioning body is provided with the marking function will be described. The rising portion 4 of each cushioning material 4 in the cushioning type protective fence 1 described above.
If at least one selected from the group consisting of a coloring material, a reflecting material, a phosphorescent material and a fluorescent material is provided on the upper surface of a and / or the surface of the end portion 4b as necessary, the part having the material will have a gaze guidance effect. Plays a role to facilitate smooth traffic, and the road surface R
The lower end of the skeleton 1a installed in the vehicle, that is, the boundary between the cushioning type protective fence 1 and the road surface R can be clearly indicated to the driver as a dangerous position to avoid a collision at night.
It should be noted that the material selected from the above group may be provided on at least a part of the portion exposed to the outside of each cushion material 4, and its specific mode is not limited.
When provided on the upper surface of the rising portion 4a of the cushion material 4 shown in
Since the upper surface of the rising portion 4a is raised in a circular arc shape from the road surface R, it is well visible in the driver's field of view and rich in recognizability. Further, its color tone is also free, and it may be mixed in the material of each cushion material 4 from the beginning, and further, the marking means such as post-coating or post-bonding is free.

5 to 8 exemplify other modes of the cushioning material 4 forming a cushioning body, and the cushioning material 4 in each drawing is shown.
The space 12 is provided at a substantially central portion thereof with a space therebetween so that the substantially central portion is intermittent in the road direction. That is, the cushion material 4 shown in FIGS. 5 to 8 has a substantially ladder-shaped plan when the voids 12 having a rectangular shape in plan view are scattered in the substantially central portion in the side wall direction, and the cushion shown in FIG. The material 4 forms cavities 12 on the one side of the upper surface, which bulges out in a substantially wedge shape and is scattered between the parts, and the cavities 12 also on the flat part.
Is provided intermittently, and the length of the cushion material 4 is formed to be long so as to correspond to the plurality of skeletons 1a. A cushion type guard fence 1 using such cushion material 4
According to the above configuration, the support portion 30 is provided at a desired position of the void 12 which is formed between the basic concrete 11 and the bottom portion 3 of the skeleton 1a, and which is formed by the interruption of the substantially central portion of the cushioning material 4, and the void. 12 has an advantage that the contact area with the bottom portion 3 of the body 1a and the resistance are reduced and the body 1a is easily tilted, and also has an advantage that the raw material for manufacturing the cushion material 4 is reduced. still,
In the cushion material 4, a substantially central portion thereof is intermittently formed by a rectangular void 12, but the planar shape of the void 12 is not limited to a square, but may be polygonal, circular, or any other shape. However, the size, position, etc. can be arbitrarily designed.

FIGS. 9 (a) to 9 (c) and 10 (a) to 10 (d) show another embodiment of the buffer type protective fence 1.
In the structure shown in (a), a support portion 30 having a substantially trapezoidal cross section that abuts the upper surface of the foundation concrete 11 is integrally projectingly provided substantially at the center of the bottom portion 3 of the skeleton 1a, and springs are provided on both sides of the support portion 30. A steel leaf spring having a substantially chevron cross-section as the material 20 is provided so that the upper surface thereof abuts the bottom portion 3 and the legs are received by the plate 21 on the upper surface of the basic concrete 11, and An anchor bolt as the implanted connecting member 5 penetrates through the plate 21, the spring member 20 and the through hole 8 provided below the vehicle wall surface 6,
The buffer type protective fence 1 is formed by fastening with a nut in the concave groove 15 provided on the through hole 8. Here, a play is provided below the nut to allow the inclination of the body 1a (the horizontal plane of the concave groove 15 moves upward), and a double nut system is adopted to prevent the looseness.
In addition, the alignment with the road surface R is performed by the partition material 2 between the side wall portion 2 and the road material r that is mounted at the end of the road surface R.
2 (preferably elastically deformable, but the material is not particularly limited) is interposed, and a void 12 is formed in the lower portion of the bottom portion 3 by the combination, and
This prevents dust and the like from entering the void 12 from the road surface R. Also, the one shown in FIG. 2B is an anchor as a connecting member 5 which can be erected from a supporting portion 30 in which the upper surface of the basic concrete 11 is raised so as to come into contact with the flat bottom portion 3 of the skeleton 1a in a substantially arcuate cross section. The bolt is inserted into a through hole 8 provided in the lower surface of a through hole 8 ′ penetrating the body of the skeleton 1a and screwed with a nut, and a coil spring as a spring member 20 is provided on both sides of the supporting portion 30. The buffer type protective fence 1 is configured by providing a partition member 22 between the base concrete 11 formed by sandwiching the side wall portion 2 with the bottom portion 3 and the plate 21 abutting the top surface of the base concrete 11 and sandwiching the side wall portion 2. It will be done. In addition, as shown in FIG. 3C, a steel rod or a steel plate as a connecting member 5 that is planted in the flat bottom portion 3 of the skeleton 1a is separately embedded in the basic concrete 11 and the cross section from the basic concrete 11 surface is omitted. The fixing material 1 is provided in a blind hole formed from the upper surface of the support portion 30 protruding in a trapezoidal shape.
4, the bottom portion 3 and the upper surface of the support portion 30 come into contact with each other, and a laminated body of the cushion material 4 (elastic body made of synthetic resin or the like) and the plate 21 (steel plate or the like) forming the spring material 20 is formed. The shock-absorbing protective fence 1 is formed by being positioned at both ends of the upper surface of the foundation concrete 11 and respectively receiving the bottom portion 3.

Further, as shown in FIGS. 10 (a) and 10 (b), the foundation concrete 1 is provided in the substantially central portion of the bottom portion 3 of the skeleton 1a.
1. A support portion 30 having a substantially trapezoidal cross section that abuts 1 is projected, and a steel rod or a steel plate as a connecting member 5 that is planted in the support portion 30 is connected by a fixing material 14 in a blind hole on the upper surface of the foundation concrete 11. At the same time, the arc-shaped leaf spring that forms the spring member 20 extends in the road direction, and the center portion thereof is inserted into the through hole 8 provided in the lower portion of the vehicle wall surface 6, and inside the concave groove 15 provided on the through hole 8. With the bolt that is fastened with the nut at the bottom 3
The shock-absorbing protective fence 1 is constructed by fixing both ends of the spring member 20 and receiving the spring member 20 in the concave groove 15 (reinforced by a steel plate or the like) provided on the upper surface of the foundation concrete 11. It becomes. Further, as shown in (c) and (d) of FIG. 5, another supporting portion 30 having a circular cross section is separately provided between the flat bottom portion 3 and the upper surface of the foundation concrete 11 in a skewered shape to form the spring member 20. The central portion of the spring is screwed with an anchor bolt standing upright from the foundation concrete 11 with a nut, and the recessed groove 15 for accommodating both ends of the spring member 20 is fitted to the bottom portion 3 of the body 1a. It is also possible to form a shock-absorbing protective fence 1 including a shock absorber that is vertically inverted from that shown in (a) and (b) above, and the number of arc-shaped leaf springs used as the spring member 20. Also, it can be arbitrarily set according to a desired elastic deformation amount.

In each of the buffer type protective fences 1 shown in FIG. 9 and FIG. 10, the spring member 20 (elastic body) which forms a buffer body by the bottom portion 3 or the surface of the concrete foundation 11 contacting the support portion 30. Body fatigue and deterioration are prevented, and at the abutting part, the frame 1
This has the effect that the structure a can be rotated and can be easily tilted in the side wall direction.

Thus, the frame 1a in each of the above embodiments
The basic cross-sectional shape of 1 is an example, and the specific shape is not limited to this, and the design can be changed within the scope intended by the present invention. Further, as the material of the connecting member 5,
It is desirable to use a steel rod that is superior in terms of mechanical properties such as elasticity and toughness, but it is also possible to use a bolt, a steel plate, a wire, a rope or the like for the connecting member 5. Further, the specific connecting method of the connecting members 5, the number and positions of the connecting members 5, the means for fixing the skeleton 1a, the cushion material 4 and the basic concrete 11 are not limited, and the skeletons 1a are mutually connected. The connection method can also be set freely.

In addition, the end surface shape of the cushioning material 4 as a cushioning body, the length in the road direction, and the number of spring materials 20 forming the cushioning body in the road direction in each of the above-described embodiments are the same as those of the skeleton 1.
It is not limited by the length of a and can be set arbitrarily within the scope intended by the present invention. Moreover, in each of the above-described embodiments, the cushioning member 4 and the spring member 20 are illustrated as a buffer body, but the specific shape and material of the buffering body are not limited to these, and the present invention is not limited thereto. The cushioning body referred to in the above may be made of an elastic body and a material that produces the intended effect of the present invention.

Further, in each of the above-mentioned embodiments, the basic concrete 11 has an upper surface formed into a curved surface, a cross-sectional shape of which is substantially concave, a supporting portion 30 and accessories (connecting member 5, plate). 21, partitioning material 22, anchor bolts, steel materials, etc., or a mixture of these materials, which may become complicated and complicate the on-site construction, instead of this, It is also possible to use a basic block 11 '(one example of which is shown in FIG. 4D) which has been manufactured by satisfying the above requirements. In this case,
Including the shock-absorbing guard fence 1 above the foundation block 11 ', quick workability can be ensured.

[0024]

The shock-absorbing guard fence according to the present invention is provided with a shock-absorbing member at the lower part of the body whose side wall located on the vehicle traveling side serves as the vehicle wall surface, and is installed on the road surface along the traveling direction of the vehicle. In the fence, the support portion provided between the bottom of the skeleton and the foundation concrete abuts on one or both of the bottom and the foundation concrete in a non-fitting state, or the bottom is linear toward at least one of the side wall directions or Since the vehicle is erroneously formed as a curved or curved upward surface and the most protruding portion of the bottom portion or the upward surface connected to the upward surface serves as a support portion, the vehicle is erroneously opposed to the vehicle wall surface of the buffer fence. Even if the vehicle collides with the vehicle, the impact force causes the body to tilt to the side opposite to the vehicle collision side, and the cushioning body made of an elastic body provided at the bottom of the body is compressed between the foundation concrete and elastically deforms to shrink. By absorbing the impact force That. At this time, since the rotatable structure having the contact portion between the support portion and the bottom portion and / or the base concrete as a fulcrum reduces mutual contact area and resistance to facilitate tilting the body toward the side wall, The force is absorbed and relieved more efficiently to prevent damage to the colliding vehicle and driver injury, and after the impact force escapes,
Even when the skeleton body is pushed back toward the vehicle collision side due to the elastic repulsion of the cushioning body that is compressed and deformed, the skeleton body can be erected smoothly due to the existence of the support portion that can rotate the skeleton body and reduce mutual contact resistance. Can be returned to.
Further, since the weight of the entire protective fence is supported by the supporting portion, the load on the cushioning body is reduced at all times, and fatigue and deterioration of the cushioning body made of an elastic body can be prevented.

Further, since the buffer-type guard fence according to the present invention has a buffer at the bottom thereof and a vacant space is formed in the lower part of the skeleton forming the guard fence, the existence of the vacant space causes the bottom part to be formed. The contact area and resistance between the support part and the cushioning part made of an elastic material located at the lower and side parts of the support part and the support part are reduced, and the ability to tilt in the side wall direction against the impact force is excellent and the large impact force is absorbed and alleviated. , Quickly restore the body to its original state.

In addition, since the shock-absorbing guard fence according to the present invention is provided with a connecting member for connecting to the basic concrete on at least a part of the bottom, the impact force of the shock absorbing member due to the elasticity and toughness of the connecting member. It assists the absorption, relaxation, and the action of restoring the original state of the skeleton, and also prevents the movement and fall of the skeleton with the strong fastening force of the connecting member against extreme impact force.

Further, in the shock-absorbing guard fence according to the present invention, one of the wall surfaces facing the vehicle is formed to face, and the end surface of the skeleton is formed in a substantially L shape, so that the wall surface facing the vehicle serves as a roadway. In addition, by forming the other side of the road as a sidewalk or a bicycle path, it is possible to secure traffic safety on the roadside.

The skeleton of the buffer type safety barriers according to the present invention, the bent surface or a curved surface projecting its bottom downward in the width direction serving as the sidewall direction <br/> Niwata Ri convex over between both sides of the skeleton In order to form the most projecting portion of the curved surface or curved surface as the supporting portion, the most projecting portion of the bottom formed by the surface shape becomes the supporting portion that abuts the basic concrete in a non-fitting state. The skeleton body that receives an impact force easily tilts toward the side wall.

[Brief description of drawings]

FIG. 1 is a buffer guard fence according to an embodiment of the present invention, in which (a) is a partial front view showing a laid state, (b) is the same plan view, and (c) is an A in (b). -A sectional view.

2 (a) to (e) show another embodiment of the cushioning type protective fence according to the present invention, and (a) and (d) are laying sectional views,
(B), (C) and (E) are partially laid cross-sectional views.

3 (a) is an O- in FIG. 2 (b) or FIG. 2 (d).
The partial sectional view which illustrates O cross section, (B) The partial sectional view which illustrates the PP cross section in the same (E).

FIG. 4 shows another embodiment of the cushioning type protective fence according to the present invention, in which (a) is a laying sectional view and (b) is Q- in (a).
Q sectional view, (C) is an RR sectional view in (B),
(D) is an example of a foundation block, and its laying sectional view.

5A and 5B show another aspect of the cushioning material, in which (A) is a front view, (B) is a plan view, and (C) is a sectional view taken along line I-I in (B).

FIG. 6 shows another aspect of the cushioning material, (A) is a front view, (B) is a plan view, and (C) is a JJ cross-sectional view in (B).

7A and 7B show another aspect of the cushioning material, in which (A) is a front view, (B) is a plan view, and (C) is a KK cross-sectional view in (B).

FIG. 8 shows another aspect of the cushioning material, (a) is a front view, (b) is a partial plan view, and (c) is an L- in (b).
L sectional view, (d) is the same MM sectional view.

9 (a) to 9 (c) are partially laid cross-sectional views showing another embodiment of the shock-absorbing protective fence according to the present invention.

FIG. 10 shows another embodiment of the cushioning type protective fence according to the present invention, in which (a) is a partially laid sectional view, (b) is an S-S sectional view in (a), and (c) is partially laid. A sectional view, (d) is a TT sectional view in (c).

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Buffer type guard fence, 1a ... Frame, 2 ... Side wall part, 3 ... Bottom part, 3a ... Upward surface, 4 ... Cushion material, 4a ... Upright part,
4b ... End, 5 ... Coupling member, 6 ... Vehicle wall surface, 7 ... Connecting wall, 8,8 '... Through hole, 9 ... Face, 11 ... Foundation concrete, 11' ... Foundation block, 12 ... Vacancy, 13 ... Bulging part, 15 ... Groove, 20 ... Spring material, 21 ... Plate, 22
... Partition material, 30 ... Supporting part, R ... Road surface, r ... Road material

Claims (6)

(57) [Claims] 1. A protective fence installed on a road surface along a traveling direction of a vehicle, wherein a cushioning body is provided at a lower portion of a skeleton (1a) having a side wall located on a vehicle traveling side as a vehicle wall surface (6).
The bottom part (3) of the frame (1a) and the foundation concrete (11)
A shock-absorbing guard fence, characterized in that a supporting portion (30) provided therebetween is in contact with one or both of the bottom portion (3) and the foundation concrete (11) in a non-fitting state. 2. The upward surface (3) in which the bottom portion (3) is linear or bent or curved toward at least one of the side walls.
a), and the bottom portion (3) continuous with the upward surface (3a) or the most protruding portion of the upward surface (3a) is the support portion (3).
0) The buffer type guard fence according to claim 1. 3. A vacant space (12) at a lower part of the skeleton (1a).
The shock-absorbing protective fence according to claim 1 or 2, which is formed. 4. The shock-absorbing protective fence according to claim 1, wherein at least a part of the bottom portion (3) is provided with a connecting member (5) for connecting to the concrete foundation (11). 5. A face (9) facing one of the wall surfaces (6) of the vehicle.
The buffer type protective fence according to any one of claims 1 to 4, wherein the end face of the skeleton (1a) is formed in a substantially L shape. 6. The bottom (3) of the skeleton ( 1a) is attached to the skeleton (1
Ritotsu cotton in the width direction serving as the sidewall direction across between both sides of a)
A structure for a cushioning type protective fence, characterized in that it is formed in a curved surface or a curved surface that protrudes downward in the shape of a circle, and the most protruding portion of the curved surface or the curved surface serves as the support portion (30).