JP2003313837A - Wooden protective fence - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a one-piece wooden protective fence excellent in design property, friendly to persons, vehicles and environments and easy to set at a low cost. <P>SOLUTION: This one-piece wooden protective fence comprises a cushioning material formed of only a one-piece sheet-like wooden unit material having a width extending from the minimum height HMIN necessary to prevent the slipping under a collided vehicle to the maximum height HMAX necessary to prevent the climbing over of the vehicle. The unit material is integrally fixed to a strut through a deformable bracket interposed with the strut while ensuring a block-out of 8 cm or more to the strut surface. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plurality of pillars that are erected along the road side of a road.
The present invention relates to a wooden guard fence adapted to cope with a collision by making use of a high cushioning function peculiar to wood, and in particular, the cushioning material is composed of a single wooden unit material formed by combining one or a plurality of woods.

[0002]

2. Description of the Related Art Protective fences provided on the roadside are commonly called guardrails, and steel guard rails using corrugated steel plate rails, reinforcing pipes, steel materials such as wire cables, etc. It is known that the wooden guard fence was designed to realize its function.

Examples of conventional wooden guard fences include those disclosed in, for example, Japanese Patent No. 248937 and Japanese Patent No. 2958254. Each of these uses a plurality of logs made of thinned wood or the like as a wooden cushioning material. A wooden guard fence made of timber logs is an excellent guard fence because it has excellent scenery, has an effect of reducing environmental load, and has a high function of mitigating the impacts of passengers and vehicles during a collision.

[0004] However, the wooden guard fence that has been proposed hitherto has a mode in which two or three wood logs having a circular cross section are laid across the pillar, so that it has a uniform landscape design, The choices were limited. In the town and the suburbs, a plate-like protective fence similar to a steel rail with a corrugated section may be required instead of a log-like protective fence like a ranch. In addition, since wood logs are pure natural materials, it is difficult to select the materials that match the standards, and it takes time and effort to design a uniform on-site alignment for the top, bottom, left, and right, and the installation cost is somewhat higher. There is a problem. Furthermore, in a collision test of a small vehicle with a log of wood, it was shown that the acceleration at the time of a collision was slightly large due to the positional relationship of the wheel heights of the small vehicle.

[0005]

Therefore, the present invention, in addition to the wooden guard fence made of wood logs, which has been conventionally used,
The purpose is to construct a single wooden unit material that can be installed more easily, reduce the installation cost, and add a choice of cushioning material. Further, it is an object of the present invention to provide a highly functional wooden guard fence capable of appropriately reducing the amount of flexure at the time of a collision and further reducing the acceleration applied to a small vehicle during a collision.

[0006]

According to the present invention which can solve the above-mentioned problems, a wooden cushioning material (beam) is horizontally installed inside a plurality of columns which are erected along the road side of a road, and is peculiar to wood. The minimum height H _MIN (2) of the wooden guard fence which is adapted to prevent a collision by utilizing the high cushioning function of the above, and which is required to prevent the cushioning material from getting under the collision vehicle.
50 to 430 mm) to a maximum height H _MAX (350 to 800 mm) required to prevent the vehicle from getting over. It is characterized in that a deformable bracket is appropriately interposed between the support and the block, and a blockout for the surface of the support is ensured to be 8 cm or more, and then fixed integrally to the front surface of the support. Block out
More preferably, it is 14 cm or more.

The laminated material may be an aggregated material obtained by bundling a single piece of wood or timber up and down, or a laminated material formed by laminating a plurality of lamina in front and back.

Examples of the single wood include cedar, cypress,
It is possible to manufacture by manufacturing domestic timber such as zelkova and other foreign-made large logs into the required shape. In order to prevent warping or cracking, a split groove in the vertical (longitudinal) direction may be appropriately formed on the back surface. However, when making a split groove, it is necessary to devise such as making an oblique or downward groove to prevent rainwater from entering. Wood is appropriately treated with anti-insect insects by using pollution-free artificial zeolite.

When the cushioning material is made of a single piece of wood, it is essential to interpose a deformable bracket or a rubber-like elastic body between the cushion and the support in order to sufficiently exert the cushioning function in the event of a vehicle collision. is there. By interposing these materials having a deforming function, a synthetic high buffering function can be obtained by adding appropriate deformability in addition to the buffering function peculiar to wood.

When the cushioning material is made of a single piece of wood, dust may accumulate on the upper end of the cushioning material, and moss and weeds may grow over time. Therefore, if a slope is provided at the upper end and a drainage function is provided, it is possible to prevent dust from accumulating.

Further, when the cushioning material is made of a single piece of wood, in a collision with a vehicle on the front side, the contact surface with the vehicle body of the collision vehicle or the tires, tire nuts, etc. is increased, and the separation speed after the collision is increased. It tends to slow down and increase the load on the beam. As a countermeasure against this, the front surface of the beam may be in a forward or rearward posture toward the road. If the front surface of the beam is in the forward tilting posture, for example, the collision starts at a part above the beam, and the entire plate surface does not come into contact. Also, because it is a prone posture,
The front does not get dirty and does not obstruct the landscape.

As an example of forming the cushioning material with a composite material, for example, there is an example in which a plurality of lumber products are vertically integrated into a unit. Alternatively, there is an example in which a plurality of plate materials are integrated in the front and rear. Furthermore, it is possible to combine these into a unit. In the one that is integrated vertically, in order to stabilize each other between the columns,
It is desirable to connect bolts vertically with a pitch of 500 to 600 mm. The unit material made into a unit by mutual bolt connection has high strength and can sufficiently cope with a collision of a large vehicle. Deformability, slope for drainage, and front bowing posture are the same as for single timber.

When the cushioning material is made of laminated wood, there are an example in which relatively small square pieces are bundled up and down, and an example in which front and rear lamina are overlapped. It is preferable that the square members to be stacked on top of each other are joined to each other with an appropriate resin interposed. This is to prevent warping of each square bar during use.

The laminated material can be formed by joining a plurality of types of lamina having different physical characteristics in front and back. When the front and rear lamina are laminated, the lamina may be a lamina having a hard surface and good slipperiness, a lamina having a high cushioning function for the intermediate layer, and a lamina having a high bending strength for the back layer. If the surface layer is made of a hard and slippery lamina, the behavior of the vehicle after the collision can be optimized, and the collision vehicle can be appropriately reflected with a small friction.
The middle layer can absorb impact, and the back layer can support strength.

As the surface layer lamina, oak, chestnut, zelkova, cherry, etc. having high hardness and wear resistance can be used. As the middle layer lamina, there are cedar, kiri, beech, fir,
A material having a high cushioning property such as a broom can be used.
As the back layer lamina, a material having a high tensile strength such as red pine, black pine, hemlock, or cypress can be used.
For the surface layer lamina, a polyethylene panel may be used instead of wood for the purpose of increasing the hardness. On the back layer,
Chemical fibers such as aramid fiber, tetron, carbon fiber, or a mesh material composed of these can also be used as the high tensile strength net material. As described above, the laminated wood can be used by hybridizing materials other than wood.

The surface of each wooden lamina is planarized and then sufficiently dried to have a water content of 25%. The thickness of one lamina is preferably about 20 mm for the purpose of improving drying conditions. Place a reinforcing material such as chemical fiber on the lamina surface as a part of the lamina, and apply an appropriate amount of weather resistant resin such as phenol resin or resorcinol resin on the adhesive surface 1
A plate-like laminated material is manufactured by press-molding and curing at a pressure of about 0 kg / cm ² .

In the above-mentioned wooden guard fence provided with the cushioning material, the support columns can be constituted by a single steel pipe canal, or an above-ground concrete molded product rigidly connected to an underground steel pipe part.

When the above-ground part is made of concrete,
It is possible to provide legs at the bottom thereof, fill the mortar in a steel pipe pit buried in the ground, and insert and fix the legs in the filled mortar. In this case, a pedestal block surrounding the upper end is provided on the ground surface of the buried steel pipe shield. If a pedestal block is provided, when a collision load that tries to tilt the support column outward is applied, a force that pulls out the legs from the filling mortar acts on the pedestal block as a reference, and the collision load is converted into a pulling force. , Legs are not easily bent, and a strut having strong bending strength can be configured. Therefore, the area of the pedestal block is
It is formed more than twice the area of the bottom of the concrete molding.

Further, in the wooden guard fence, if the support column rotates during a vehicle collision, there is a concern that the beam attachment point may be damaged and the fence itself may be damaged. Therefore, in the wooden guard fence, in order to suppress the rotation of the pillar, it is effective to attach a rotation suppressing plate to the underground part of the pillar. The rotation inhibiting plate can be dealt with, for example, by radially welding a metal plate having a required area onto the outer surface of the underground portion of the steel pipe shield.

The wooden guard fence constructed as described above can be designed to reduce the acceleration given to a vehicle or a person at the time of collision by 0.5 to 1.0 g or more in accordance with safety standards by repeating numerous collision experiments. Was proved. Moreover,
The unit material can be manufactured in a factory at a low cost, and since the unit products can be installed in a manner of sequentially fixing the unit products to the columns, the installation cost can be kept extremely low. The design is high, and in addition to the existing multiple log beam materials, the number of options is increased and the range of application is expanded.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 and 5 show an example of a wooden unit material made of a single piece of wood. 6 to 10 show an example of a wooden unit material formed by collecting a plurality of woods. 11 to 15 show an example of a wooden unit material formed by assembling lamina.

As shown in FIG. 1, a wooden guard fence 1 according to an embodiment of the present invention is provided with a deformable bracket 4 in front of a plurality of columns 3 standing on the road side of a road 2. A wooden unit material 5 made of wood is integrally attached and laid horizontally.

The pillar 3 is shown as an example of a concrete molded product. The above-ground portion is a concrete molded product 6, and a leg body 7 made of a reinforcing bar that is in rigid contact with the internal reinforcing bar is provided below the concrete molded part 6. On the other hand, the underground part has a buried steel pipe tunnel 8 which is buried underground.
And a pedestal block 9 made of concrete installed around the surface of the ground. By filling the interior of the buried steel pipe shield 8 with mortar, inserting the leg 7 therein and solidifying the mortar, the two can be integrated to form the rigid column 3. Place the pedestal block 9 horizontally,
By placing the bottom of the concrete molded product 6 thereon, it can be easily installed. The area of the pedestal block 9 is at least twice the area of the bottom of the concrete molded product 6.

Since the support column 3 installed in this manner has a shape in which the legs 7 are housed inside the pedestal block 9, it has a characteristic that the overall strength is high. That is, when a collision load is applied to the front surface of the column 3, the force is applied to the pedestal block 9
Of the leg 7 is converted into a force for pulling the leg 7 out of the inside of the steel pipe proof 8. However, if the projections for fixing the mortar are provided inside the steel pipe counter 8, it is possible to easily withstand the pulling force and, eventually, it is possible to firmly cope with the collision load.

As shown in FIG. 2, the deformable bracket 4
Is equipped with a pair of arms 11 that sandwich the upper and lower ends of the wooden unit material 5 at both ends of a connecting plate 10 having a certain length, and the wooden unit material 5 can be fixed through a certain gap. ing. The fixing is carried out by inserting the bolt 12 through the holes formed in the upper and lower sides of the arm 11 and the wooden unit material 5, and fastening it with a nut (not shown) from below. The distance from the front end of the concrete molded product 6 to the front end face of the wooden unit material 5 is block out BK.
Is maintained, and a distance of 8 cm or more, more preferably 14 cm or more is maintained.

The wooden unit material 5 has a lateral dimension A of 60.
A single piece of wood that has been subjected to antiseptic treatment is used with a length of about mm and a vertical dimension B of about 260 mm. A groove may be appropriately cut on the back surface to prevent warping or cracking. This groove is cut obliquely so that the outside of the groove faces downward in order to prevent rainwater from entering. The minimum height H _{MIN based} on the road 2 is 250 to 430 mm, and the maximum height H _MAX is 7
It is set to 50 to 800 mm.

As shown in FIGS. 3 (a) and 3 (b), the front surface of the wooden unit material 5 can be placed in the forward leaning posture with respect to the vertical line 12. With this configuration, the upper portion of the front surface is projected forward with respect to the lower portion, so that it is possible to prevent the entire surface of the wooden unit material 5 from being damaged during a vehicle collision. Figure 4
Indicates the action. When a large vehicle collides with the wooden unit material 5, a timber beam with a flat front,
The number of contact surfaces with the vehicle body of the collision vehicle or with the tire 13 and the tire wheel nut 14 increases, and the separation speed after the collision decreases accordingly, and the influence thereof tends to increase the load burden on the wood beam. Therefore, it is effective to incline the entire front surface of the wood beam to reduce the contact surface with the vehicle. According to the experiment, it is possible to use the elevation angle, but the bowing is more effective.

FIG. 5 is a side view showing an example of the cross-sectional shape of a wooden unit material made of a single piece of wood. FIG. 5A is an example of a rectangular upper surface 5-1 having an arc shape. (B) The figure is an example 5-2 in which the upper portion has a roof shape with both sides inclined.
FIG. 5C is an example 5-3 in which the upper portion is an inclined surface that descends forward and the eaves portion is provided at the front end. (D) is a shape example 5-4 in which a log is divided into drums. Both have a shape that prevents dust from accumulating on the upper end.

In the wooden guard fence 1 provided with the wooden unit material 5 made of a single piece of wood constructed as described above, the wooden unit material 5 can be manufactured as a standard product with a uniform performance and can be provided at a low cost. Further, since the design as shown in FIG. 1 can be easily installed through the deformable bracket 4 as shown in FIG. 2, the installation cost is extremely low. Further, the wooden unit material 5 made of a single piece of wood as shown in FIG. 5 has high strength and can sufficiently cope with a collision of a large vehicle with a collision function peculiar to wood.

FIG. 6 shows a wooden guard fence 1 having a wooden unit material 15 made of an aggregated material made by assembling a plurality of woods.
6 is shown. The pillar 17 is shown as an example made of steel pipe.

A rotation restraining plate 18 for restraining rotation is radially welded to the upper portion of the base of the pillar 17. The wooden unit material 17 is made up of two pieces of wood 15A, 1
5B are united by connecting them with bolts (not shown) at regular intervals, for example, at a pitch of 550 mm. The wooden unit material 15 has a deformable bracket 18 for the pillar 17.
And are interconnected and fixed via. The cross section of the wood 15A is square or rectangular, and the upper end of the wood 15B at the upper position is arcuate to prevent dust accumulation.

The wooden guard fence 19 shown in FIG. 7 is different from the one shown in FIG. 6 in a column 20 and a mounting method for the column 20. In this example, the ground portion of the support column 20 is made of concrete. The attachment is performed using the fixing metal fitting 21 and the rubber cushion material 22. The fixing bracket 21 sandwiches the wooden unit material 15 between the upper and lower fixing plates, and inserts the bolts 23 vertically to fix each other. Use a round head bolt head.

As shown in FIG. 8, a rubber cushion material 22 is interposed between the column 20 and the wooden unit material 15. Therefore, the collision load is applied to the rubber cushion material 22.
You can receive it flexibly. Further, by appropriately designing the rubber material, the shape, and the thickness, it is possible to provide a required cushioning property.

The wooden guard fence 24 shown in FIG.
5, a wooden unit material 15 made of an aggregate material is attached to the material 5 via a deformable bracket 26. The wooden unit material 15 of this example is formed by collecting two pieces of wood up and down,
The upper front edge of the upper wood is chamfered.

The wooden guard fence 27 shown in FIG. 10 differs from that shown in FIG. 9 in the deformable bracket 26H. That is, the deformable bracket 26H of this example has not a single cavity but a pair of upper and lower box-shaped portions, and this portion has a deforming function. As described above, the hollow portion for providing the cushioning function can be designed in various ways without depending on the shape of the column or the like. Also,
The hollow structure part can be used in combination with the fixing member separately from other parts.

As described above, as shown in FIGS. 6 to 10, the wood unit material 15 can be formed by collecting a plurality of wood pieces. The wooden guard fence has the same function as the wooden unit material 5 made of a single wood. Each wood part can be miniaturized, and there is an advantage that thinned wood, etc. can be effectively used.

Next, an embodiment of a wooden guard fence made of laminated wood will be described.

The wooden guard fence 28 shown in FIG. 11 has a plurality of pillars 25 which are erected along the roadside of the road 2, and a large number of timbers 29 are vertically bundled through a deformable bracket 26 on the front surface thereof. A wooden unit material 30 made of laminated wood is horizontally installed. The square members 29 are thermocompression-bonded to each other using a resin agent.

The deformable bracket 26 has a deformable space 31.
And upper and lower laminated material mounting portions 32 projecting forward, and four mounting holes 33 are provided corresponding to each mounting portion 32.
Is open.

The length of the wooden unit material 30 is the length of the column 2.
A bolt insertion hole corresponding to the mounting hole 33 is provided at the upper and lower ends at substantially the same distance as the distance PL between 5 and 25. The width of the wooden unit material 30 is formed to be 50 to 80 mm so that its front end projects forward from the mounting portion 32. A value obtained by adding the width of the wooden unit material 30 to the dimension of the deformation space 31 is the blockout BK. The blockout BK is set to 8 to 14 cm or more. The width A of the wooden unit material 30 is about 100 mm.

The unit material 30 is fixed to the support column 25 through the deformable bracket 26 by aligning the bolt insertion holes of the unit material 30 with the mounting holes 33, inserting the bolts vertically, hooking the nuts, and tightening. be able to. The nut is in the down position. A resin may be appropriately applied to the surface of the unit material 30 to reduce the frictional force and increase the water resistance and weather resistance.

With respect to the design property of the wooden guard fence 28 having the above-described configuration, as shown in the drawing, it is excellent in aesthetic appearance and more options are available. Functionally, when a vehicle collides from inside the road 2,
In addition to the high cushioning function peculiar to wood, the peculiar bending characteristics of laminated wood can reduce the acceleration applied to the vehicle to 9 g or less.
Unlike the wooden guard fence made of logs shown in the conventional example, since the collision vehicle is received by the wooden board surface, the deformation can be made large and the acceleration can be suppressed to a particularly low level. Wooden unit material 30
Since it can be mass-produced in a factory, the cost can be kept low, and the installation cost can be reduced because it can be installed by the simple procedure as described above.

FIG. 12 is a perspective view of a wooden guard fence 34 showing another embodiment of the present invention. Portions having the same functions as those of the members shown in FIG. 11 are designated by the same reference numerals. In the wooden guard fence 34 shown in FIG. 12, as a cushioning material,
Many flat lamina 35 (35a, 35b, 35c)
Wooden unit material 36 made of laminated wood made by joining front and rear
It is shown. The unit material 36 is divided into a surface layer 35a, an intermediate layer 35b, and a back surface layer 35c.

For the surface layer 35a, oak, chestnut, zelkova, cherry, etc. having high hardness and wear resistance are used. Intermediate layer 35b
Has good cushioning properties such as cedar, drill, beech, fir,
Use a bow. For the back surface layer 35c, red pine, black pine, hemlock, cypress and the like having high bending strength are used. In addition to these basic materials, a resin or other reinforcing material may be combined to form a hybrid material. An example of this is shown in FIG. Each lamina is sufficiently dried to have a water content of 25% or less, and then an appropriate amount of phenol resin or resorcinol resin is applied and pressure-bonded at a pressure of 10 kg / cm ² .

The mounting to the deformable bracket 26 by the mounting hole 33 is shown as an example of fixing with bolts penetrating up and down, but it is also possible to fix with bolts passing forward and backward. In this case, a counterbore hole is provided in the surface layer of the unit material 36 so that the bolt head does not protrude forward, and the bolt head is housed inside.

The plate-like lamina 35 has a three-layer structure 35a, 35.
b, unit material 36 made of laminated wood formed as 35c
According to the paper, in the collision of the vehicle, the front surface layer 35a provides slippage, the intermediate layer 35b provides cushioning, and the back surface layer 35c
Can maintain strength. It can be used as a wooden guard fence that is friendly to people, vehicles, and the environment without giving excessive impact to vehicles and passengers.

13 to 15 show a wooden guard fence 37 according to still another embodiment of the present invention. In the wooden guard fence 37 of this example, a deformable bracket 28 is provided on the road 2 side of the support 17 made of steel pipe, and a high tensile strength net 38 is arranged on the road side as a reinforcing material to prevent the vehicle from slipping into the inside. A plate-shaped wooden unit material 39 having a width ranging from a minimum height H _MIN required for the vehicle to a maximum height H _MAX required to prevent the vehicle from getting over is fixed by interposing a holding plate 40. is there. The tilt angle of the column 17 due to the collision can be limited to within 15 degrees.

As shown in detail in FIG. 14, the unit material 39 of this example is composed of a surface layer 35a and an intermediate layer 35b having a three-layer structure.
And a back surface layer 35c, and has a total five-layer structure. For the surface layer 35a, a hard oak, chestnut or the like that is hard and has a good slip property is used. For the intermediate layer 35b, cedar, drill, fir or the like having a good cushioning property is used. For the back surface layer 35c, pine, cypress, bamboo or the like having high bending strength is used alone or in combination. It is also possible to add a reinforcing material such as carbon fiber, aramid fiber or tetron as a reinforcing layer between the intermediate layer and the back surface layer to form a hybrid laminated material. The laminating method of each lamina is the same as that shown in FIG.

As shown in FIG. 14, a pair of upper and lower grooves 41 are projected at both ends of the surface layer 35a of the unit material 39, and a pair of bolt insertion holes 42 are formed in each groove 41 in the front-rear direction. There is. The groove 41 is for accommodating the pressing plate 40 and fixing it to the deformable bracket 28 with a bolt (not shown). The presser plate 40 is disposed so as to straddle the adjacent unit materials, and the unit material 39
They serve to fix each other and to the bracket 28. The head of the fastening bolt is housed in the groove.

The wooden guard fence 3 shown in FIG. 13 using FIG.
The installation method of No. 7 will be described. First, the deformable bracket 26H is fixed to the column 17, as shown in FIG. This fixing is performed using a band member (not shown).
Next, as shown in (b), a strip-shaped high tensile net 38 is tensioned and installed along the inner surface of the deformable bracket 26H fixed to each of the columns 17.

Then, as shown in (c), the wooden unit material 39 is aligned with a predetermined position, the pressing plate 40 is put in the groove 41, and the bolt 43 is attached from the front side as shown in (d). After passing, the nut 44 is hung and fixed.

The wooden guard fence 37 installed as described above is
Deformable bracket 2 having a deformation space with respect to the column 17
A high-tensile-strength net 38 is attached to the back surface via 6H, and a wooden unit material 39 is laid horizontally. When the vehicle collides, the wooden unit material 39 flexes appropriately, and the acceleration applied to the vehicle can be suppressed to 9 g or less.

Since the high tensile strength net 38 is stretched and the pressing plate 40 corresponds to the tension, the unit material 39
The flexure reaches the limit and is not damaged. The high tensile strength net 38 can maintain the strength in cooperation with the unit material 39 and can have an appropriate bending characteristic.

On the surface of the unit material 39, a friction reducing material made of metal, resin, hard wood or the like can be provided in order to reduce the frictional force with the vehicle and improve the slip. It is preferable that a pair of friction-reducing materials be provided in a band shape above and below the surface layer 35a of the unit material 39. This is to increase the friction reducing effect.

Alternatively, the unit material 39 may be hybridized and the high tensile strength net 38 may be incorporated in a part of the intermediate layer 35b or the back surface layer 35c. If you do this,
It is possible to install the high-strength cushioning material only by installing the wooden unit material 39 without separately installing the high tensile strength net 38, and it is possible to reduce the installation cost.

The present invention is not limited to the above-described embodiments, but various modifications may be made without departing from the scope of the present invention.

[0057]

As described above, since the present invention is a wooden guard fence as set forth in the claims, basically, a single plate-shaped unit material is stretched over the pillar. A vehicle collision can be dealt with by itself, and it is possible to provide a wooden guard fence that is easy to install, low cost, and highly functional. Since the collision occurs on the wooden unit material, the collision acceleration can be suppressed to a particularly low level. In addition, since it can be used in addition to the conventional wooden guard fence using logs, there are more design options. Furthermore, since it is made of wood, it serves as a wooden guard fence that is friendly to people, cars, and the environment.

The wood unit material can be composed of a single piece of wood or a set of a plurality of pieces of wood, or laminated wood in which square pieces are stacked one above the other, or lamina of plate materials are joined together. Alternatively, a reinforcing material may be added to these to make various configurations, so that it is possible to respond appropriately at low cost according to the place and conditions.

Further, if the pillar is made up of a concrete molded article having legs, a steel pipe tunnel for burying the legs with mortar, and a pedestal block arranged on the surface of the steel pipe can, the collision load can be improved. Can be converted into the leg withdrawing force, and the strength can be increased, and it is possible to sufficiently cope with a collision of a large vehicle.

By providing a rotation preventing plate on the steel pipe resistance where the support pillar is located in the underground portion, rotation of the support pillar is suppressed when a collision load is applied, and it is possible to prevent the wooden unit material from coming off from the support pillar and being damaged. .

If a drainage gradient is provided on the upper end surface of the wooden unit material, not only can drainage be performed, but dust accumulation can be prevented and moss and grass can be prevented from growing.

If the front of the wooden unit material is in the forward leaning posture toward the road, the deceleration speed is not reduced and the entire damage of the wooden unit material can be prevented when a large vehicle collides.
The collision response function can be improved.

If a high expansion force reinforcing material is provided on the back surface of the wooden unit material, the mutual tension becomes large and the collision response strength becomes large. Further, by mounting the friction reducing material on the surface, it is possible to prevent the collision speed of the vehicle from being rapidly reduced, and it is possible to prevent the wooden unit material from being damaged by the impact applied to the wooden unit material.

[Brief description of drawings]

FIG. 1 is a perspective view of a wooden guard fence provided with a wooden unit material made of a single piece of wood.

2 is a perspective view of a deformable bracket used to secure a wooden unit material of the wooden guard fence of FIG. 1. FIG.

FIG. 3 is a side view illustrating an example in which the front of the wooden unit material of the wooden guard fence in FIG.

FIG. 4 is a side view illustrating the action of the forward leaning posture shown in FIG.

5 is a side cross-sectional explanatory view showing an example of the cross-sectional shape of the wooden unit material shown in FIG.

FIG. 6 is a perspective view of a wooden guard fence provided with a wooden unit material made of aggregated wood.

FIG. 7 is a perspective view of a wooden guard fence showing another embodiment of the wooden unit material made of aggregated wood.

8 is a side sectional view taken along line F8-F8 of FIG.

FIG. 9 is a perspective view of a wooden guard fence showing still another embodiment of a wooden unit material made of aggregated wood.

FIG. 10 is a side view of the wooden guard fence in which the deformable bracket in the embodiment of FIG. 9 is replaced with another bracket.

FIG. 11 is a perspective view showing an embodiment of a wooden guard fence made of laminated lumber formed by bundling square lumber up and down.

FIG. 12 is a perspective view showing an embodiment of a wooden guard fence made of laminated wood formed by laminating a plurality of plate lamina.

FIG. 13 is a side sectional view of a wooden guard fence configured by combining a laminated lumber formed by laminating a plurality of lamina of plate materials with a high tensile strength net.

FIG. 14 is an enlarged perspective view showing the details of the laminated member shown in FIG.

15A and 15B are explanatory views showing an installation method of the wooden guard fence shown in FIG. 13, wherein FIGS. 15A, 15B and 15C are front views of the installation procedure, and FIG. 15D is a partially cutaway plan view. Indicates.

[Explanation of symbols]

1, 16, 19, 24, 27, 28, 34, 37 Wooden guard fence 2 Roads 3, 17, 20, 25 Struts 4, 18, 26, 26H Deformable brackets 5, 15, 30, 36, 39 Wooden unit materials 6 Concrete Molded Products 7 Legs 8 Steel Pipe Anti- 9 Base Blocks 10 Connecting Plates 11 Arms 12 Vertical Lines 13 Tires 14 Tire Wheel Nuts 15A, 15B Wood 21 Fixing Metal Fittings 22 Rubber Cushion Materials 23, 43 Bolts 29 Corners 31 Deformation Spaces 32 Assembly Material mounting part 33 Mounting hole 35 Lamina 38 High expansion force net 40 Holding plate 41 Groove 42 Bolt insertion hole 44 Nut H _MIN Minimum height H _MAX Maximum height BK Block out PL Distance between columns

Claims (9)

[Claims] 1. A wooden guard fence in which a wooden cushioning material is laid horizontally inside a plurality of columns that are erected along the roadside of a road so as to respond to a collision by utilizing the high cushioning function peculiar to wood. A width from the minimum height H _MIN required to prevent the collision vehicle from going under to the maximum height H _MAX required to prevent the vehicle from passing over 1 Alternatively, it is configured by a single wooden unit material formed by combining a plurality of woods, and the wooden unit material is provided with a deformable bracket or a rubber-like elastic body interposed between the wooden unit material and the wooden unit material to block out the pillar surface. A wooden guard fence, characterized in that it is secured to the front of the pillar integrally after securing at least 8 cm. 2. The wooden guard fence according to claim 1,
The wooden guard fence is characterized in that the wooden unit material is an aggregated material formed by bundling a single piece of wood or timber up and down, or an aggregated material formed by assembling a plurality of lamina in front and rear. 3. The wooden guard fence according to claim 1, wherein the minimum height is 250 to 430 mm and the maximum height is 750 to 800 mm. 4. The wooden guard fence according to claim 1, wherein a pillar is formed of a concrete molded article having a mounting portion of the wooden unit material on the road side, and the pillar above the pillar. Rigid leg provided on the lower surface of the base, a pedestal block with an opening buried near the surface of the ground, and a steel pipe pile that is buried underground through the opening of the pedestal block and accommodates and fixes the leg at the top A wooden guard fence characterized by being configured with and. 5. The wooden guard fence according to any one of claims 1 to 3, wherein a rotation restraining plate is attached to an underground portion of the pillar. 6. The wooden guard fence according to claim 1, wherein a drainage slope is provided on an upper end surface of the wooden unit material. 7. The wooden guard fence according to any one of claims 1 to 3, wherein the front surface of the wooden unit material is in a forward leaning posture toward the road. 8. The wooden guard fence according to claim 1, wherein a high tensile strength auxiliary material is provided on the back surface of the wooden unit material. 9. The wooden guard fence according to any one of claims 1 to 3, wherein the surface of the wooden unit material is equipped with a friction reducing material.