JP2002069952A - Guardrail device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a guardrail device capable of stopping a car while absorbing a shock by a curved deformation of a wooden beam when the car collides with the guard rail, while harmonizing with a road or the like in the mountains without incongruous feeling by use of wooden beams. SOLUTION: The guardrail device is provided with a plurality of supports 12,... erected at every specified distance in rows on the ground and wooden beams 14,... mounted on the supports 12 so as to be laid between them in a state that the rear side of the beam is turned to the supports 12. The cross section of the wooden beam 14 is formed of protrusion parts 16 arcuately bulged out at the surface side 14a and arranged separately to the right and left, a recessed face part 18 put between both protrusions 16 and consecutively formed in the both protrusions 16, and a common flat face part 19 for respective parts of the surface side at the rear face side 12a of the wooden beam 14, to constitute the guardrail device 10. The balance of the surface side strength and the rear face side strength of the wooden beam 14 is kept by partly notching the material of the surface side 14a of the wooden beam at the recessed face part 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guardrail device installed on a road shoulder or the like.

[0002]

2. Description of the Related Art Conventionally, as a guardrail provided on a road shoulder or the like, a steel rail or a thick wire wrapped around a pillar has been widely used. Not only main roads, but also sightseeing spots, residential areas, park roads and parking lots,
It is used as it is in such as. However, especially in tourist spots where the natural scenery is a selling point, such as mountains and plateaus, guardrails made of steel artifacts give a sense of incongruity and impair the scenery. On the other hand, Japanese Patent Application Laid-Open No. 2000-73324 discloses a wooden guardrail in which a wooden beam is suspended between columns to achieve harmony with the landscape.

[0003]

However, the wooden guardrail disclosed in the above-mentioned publication uses a wooden beam having a log shape as shown in FIG. It broke suddenly with almost no bending deformation. That is, since the wood has a significantly lower tensile strength than the compressive strength in the longitudinal direction of the log, the compression region S1 in which the compressive stress acts on the bending load is used.
In a log-shaped wooden beam having the same cross-sectional area as the tensile area S2 where the tensile stress acts, the fiber is torn in the tensile area S2 on the back side without being bent and deformed because the compression area S1 on the front side is too strong. It breaks sharply from the beginning. When a car collides with such a beam, it either stops the car suddenly without absorbing any impact, or breaks momentarily, causing the car to penetrate, and the damage of the accident cannot be reduced. The effect of improving road safety was low.

[0004] The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to use beams made of wood to harmonize with mountain roads and urban residential areas without discomfort.
It is an object of the present invention to provide a guardrail device that can stop a vehicle while absorbing a shock due to bending deformation of a wooden beam when the vehicle collides, thereby reducing damage caused by an accident and improving road safety.

[0005]

In order to achieve the above-mentioned object, the present invention provides a plurality of columns 12. . . 13. A wooden beam 14 which is mounted horizontally across the support columns 12 with the back side facing the side surfaces of the support columns 12. . . The wooden beam 14 has a bulged portion 16 whose front surface side 14a bulges in an arc shape in a cross-sectional view, and which is inserted between the bulged portions 16 and is vertically spaced apart from each other. A guard rail device 10 having a concave surface portion 18 formed continuously with the portion 16, and a flat surface portion 19 having a common portion on the front side 12 a is formed on the back side of the wooden beam 14. Is done.

Further, a metal reinforcing plate 26 may be attached to the back side 14b of the wooden beam 14 over substantially the entire length in the longitudinal direction.

In addition, a plurality of columns 12. . . Two wooden beams 14, which are adjacent to the pillar 12 located in the middle,
14, a mounting and fixing portion 20 is provided for fixing to the column 12 while abutting the longitudinal end positions of the mounting and fixing portion 20.
A lateral stay 22 is disposed astride the two wooden beams 14, 14, both ends of which are adjacent to each other, and the center of the back side is applied to the column 12.
A vertical stay 24, which is vertically fixed at a position near the butting end 14c of the base 4b and which is arranged in an H-shape with the horizontal stay 22,
24 and the wooden beams 14, 14 are attached to the back side 14b of the wooden beams 14, 14 along the longitudinal direction, and their ends 26c are sandwiched between the vertical stays 24 and the horizontal stays 22. The reinforcing plate 26 in which the portions 26c and 26c are arranged in abutting manner, a first fastening member 28 for fastening the wooden beam 14, the vertical stay 24, the reinforcing plate 26 and the horizontal stay 22, and at least the horizontal stay 22 and the column And a second fastening member 32 for fastening and fixing the second fastening member 12 to the second fastening member 32.

[0008]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. As shown in FIG. 7, the guardrail device of the present invention includes a plurality of columns 12. . . And the back side of these pillars 12. . . 11. The strut facing the side of . . And a wooden beam 14 that is attached horizontally across the frame. The support column 12 is erected with its lower end buried in the ground, and has a through hole in the lateral direction for inserting a bolt at an appropriate position on the side standing on the ground. The strut 12 of this embodiment is made of wood and formed in a quadrangular prism shape, and foundation concrete or the like is appropriately constructed according to the ground to be embedded.

In the guardrail device 10 according to the present embodiment, a plurality of wooden beams 14 each having a required length are continuously attached in the longitudinal direction, and two wooden beams 14 adjacent to each other have a longitudinal end. Butt end 1
4c. As shown in FIG. 7, the butt end 14 c of the wooden beam 14 to be bridged is set to the position of the column 12 between the columns located in the middle of the long guardrail device 10.

That is, in the guardrail device 10 of the present embodiment, the connection between the adjacent wooden beams 14, 14 is always made at the position of the column 12, and as shown in FIGS. . . Among them, an attachment fixing portion 20 for fixing the two wooden beams 14 and 14 to the support 12 while abutting longitudinal end positions of two adjacent wooden beams 14 is provided on the intermediate support. At the extreme end of the long guardrail device 10, the end of the wooden beam 14 is slightly extended from the column 12 and protrudes therefrom.
6 is rounded with no corners to avoid danger.

As shown in FIG. 4, the wooden beam 14 has bulging portions 16 and 16 bulging in an arc shape on a front surface side 14a in a sectional view, and bulging portions 16 and 16 which are arranged vertically separated from each other. The wooden beam 14 has a flat surface common to the respective portions 16, 18, 16 of the front surface side 14a on the back side of the wooden beam 14. Face part 1
9 are formed.

As shown in FIGS. 1 and 7, the concave surface portion 18 is formed along the longitudinal direction at the center of the wooden beam 14 on the surface 14a side. It has been scraped off at a depth. Wooden beam 14
The flat surface portion 19 on the back side is formed on the entire surface from the upper end to the lower end on the back side of the wooden beam 14. That is, the upper and lower bulging portions 16 and 16 and the back surface side of the concave surface portion 18 are formed in the same plane, and the cross section of the wooden beam 14 is formed in a one-sided dumbbell shape.

The front side 14a of the wooden beam 14 has a part of the material lost due to the rounded chamfering of the concave surface portion 18 and the bulging portion 16, and the rear side 14b has the entire surface of the wood distributed.
The concave surface portion 18 of the present embodiment is formed so that a material having a width of about 1/3 of the entire width of the wooden beam 14 and a thickness of about 30% of the total thickness is lost from the surface 14a.

As shown in FIG. 8, when a load is applied to the wooden beam 14 of the present embodiment from the front side 14a, a tensile stress is generated on the back side and a compressive stress is generated on the front side 14a, but the back side is flat. Since the surface portion 19 is formed, the whole surface becomes a tension region S2, and the bulging portion 16 becomes a compression region S1 on the front surface side since the concave surface portion 18 is formed at the center. That is, although the cross-sectional area of the tensile zone S2 is much larger than the compressive zone S1, the wooden beam 14 has a significantly lower tensile strength than the compressive strength. Can be balanced. Therefore, the wooden beam 14 bends first without being suddenly broken by a load from the side, so that when a vehicle collides, the wooden beam 14 can be stopped while absorbing the impact.

Further, the guardrail device 1 of the present embodiment
In the case of 0, only the wooden beam 14 is connected, but it may be connected to a steel beam which is generally widely used.
In the wooden beam 14 of the present embodiment, the curved surface of the front side 14a formed by the bulging portions 16, 16 and the concave surface portion 18 is close to the curved surface of the conventional steel beam, so that even if they are adjacent to each other, the surfaces are almost aligned. Is continued. Therefore, even when the car or bicycle comes into contact with the portion where the steel beam and the wooden beam switch from each other in an oblique direction, there is no impact on the step.

The wooden beam 14 is formed by first bonding three prisms up and down to form an integral pillar having a laterally concave cross section, and then forming the corners of the portions protruding in the lateral direction into R chamfers. After the wooden beam 14 is integrally formed as described above, the wooden beam 14 is put into a chamber filled with a preservative vaporized and preserved. At this time, since the chemical enters the bulging portion 16 also from the surface on the side of the concave surface portion 18, the bulging portion 16 can be preserved to the inside in a short time instead of being thick. The method of forming the wooden beam 14 is not limited to the above-described method. For example, two pillars having a D-section to form a bulging portion 16 by flattening three surfaces of a log to form a concave surface portion 18 are provided. It may be assembled with a prism.

As shown in FIGS. 5 and 6, in the mounting and fixing portion 20 of the guardrail device 10 according to the present embodiment, the wooden beams 14, 14 at the butted ends 14c of the back surfaces 14b of the butted wooden beams 14, 14 are respectively located near the butting ends 14c. A vertical stay 24 fixed vertically is attached. The vertical stay 24 is a long rectangular metal plate member, and has a through hole at the center in the longitudinal direction and near the end.

At positions where the vertical stays 24 are arranged in the wooden beam 14, through holes corresponding to the through holes of the vertical stays 24 are formed from the front side to the rear side. In addition, the vertical stay 24 is additionally provided not only at the position near the butting end 14c of the wooden beam 14 but also at an intermediate position as appropriate. By providing the vertical stay 24 on the back of the wooden beam,
The wooden beam 14 serves as a pedestal for a reinforcing plate 26 to be described later while preventing the wooden beam 14 from being cracked in the longitudinal direction.

The back side 14 of the wooden beam 14 of the present embodiment.
A metal reinforcing plate 26 is attached to “b” over substantially the entire length in the longitudinal direction. As shown in FIG. 6, the reinforcing plate 26 is a metal beam member having a required width and thickness.
The book is formed to have a length corresponding to substantially the entire length of the wooden beam 14. At positions near both ends of the reinforcing plate 26, there are provided through holes penetrating in the thickness direction.

The end side of the reinforcing plate 26 is perpendicularly abutted on a vertical stay 24 near the butt end 14c of the wooden beam 14, and the through hole at the end is aligned with the central through hole of the vertical stay 24. ing. Since the reinforcing plate 26 is not directly attached to the back surface of the wooden beam 14 but is passed through the vertical stay 24, even the reinforcing plate 26 having a width smaller than that of the wooden beam 14 can evenly reinforce the back surface of the wooden beam. Also, the ventilation of the back surface of the wooden beam is improved to prevent weakening due to decay.

As shown in FIG. 6, the ends of the reinforcing plates 26, 26 are shifted inward in the longitudinal direction from the butting ends 14 c of the wooden beams 14, and when the wooden beams 14, 14 are butted at the mounting fixing portion 20. A gap 30 is formed between the ends of the reinforcing plates 26, 26 to allow a head of a second fastening member 32 to be described later to escape.

As shown in FIG. 6, the mounting and fixing portion 20 in the present embodiment has two wooden beams 1 whose both ends are adjacent to each other.
The strut 1 is arranged over the sides 4 and 14 and the center of the back side is
2 and the wooden beams 14,
14 and a vertical stay 24 which is vertically fixed at a position near the butting end 14c of the rear surface 14b and is arranged in an H-shape with the horizontal stay 14, and the rear surfaces 14b of the wooden beams 14, 14.
The ends 26c are sandwiched between the vertical stays 24 and the horizontal stays 22, and the ends 26c, 26c are arranged in abutting manner. Reinforcement plates 26, 26 and wooden beam 1
First fastening members 28 and 28 for fastening the stays 4 and 14, the vertical stays 24 and 24, the reinforcing plates 26 and 26, and the horizontal stay 22, a second fastening member 32 for fastening and fixing at least the horizontal stay 22 and the column 12; It has.

As shown in FIG. 6, the horizontal stay 22 is a metal plate member formed in an elongated rectangular shape, and has through holes at the center and the end in the longitudinal direction. The horizontal stay 22 is arranged horizontally long by aligning a central through hole and a through hole provided at a required position of the column 12, and is fastened and fixed by a bolt N as a second fastening member 32 and a nut N. At this time, both ends of the horizontal stay 22 project from both sides of the column 12. In the through holes at both ends of the horizontal stay 22, a central through hole of the above-described vertical stay 24 and a through hole of the reinforcing plate 26 corresponding thereto are arranged so as to communicate with each other. A bolt as the first fastening member 28 is inserted and fastened and fixed with a nut N.

While the two vertical stays 24, 24 and the horizontal stay 22 are arranged in an H-shape, the one end of the reinforcing plate 26 is fastened together, and the horizontal stay 22 and the column 12 are fastened and fixed. By doing so, each member can be fixed to the column 12 integrally with a small number of fastening members while simplifying the shape of each member.

In this embodiment, the column 12 is made of wood and the wooden beam 14 matches the material. However, a column made of steel, which has been widely used, can be used. In addition, the bolt as a fastening member uses a root polygon round head bolt that forms a polygonal part for applying a spanner to a part of the hemispherical head, but the safety is enhanced, but it is not limited to this Instead, an appropriate one may be used.

[0026]

As described above, the guardrail device of the present invention comprises a plurality of columns which are erected on the ground at required intervals in a row, and the back surface of which is directed to the side surfaces of these columns. A wooden beam spanned between the columns and attached horizontally, the wooden beam bulges in an arc shape on the surface side in a cross-sectional view, and a bulged portion arranged vertically separated from each other; Since there is a concave surface portion inserted between the two bulging portions and formed between them, a flat surface portion having a common portion on the front side is formed on the back side of the wooden beam, Although the beam material is wooden, the cross-sectional shape with bulges formed above and below the concave surface allows the safety of humans and vehicles as a guardrail with a good balance of shock absorption and rigidity. Most of the part visible from the side So merges also without discomfort to many mountains and meadows of the road of trees can achieve a natural landscape, it is possible to realize a warm road environment in residential and office buildings in urban areas. In addition, since the front curved surface of the wooden beam is close to the curved shape of the conventional steel beam, even if it is installed continuously on the existing steel guard rail, there is no large step at the beam joint, and the wrong driving Even if the bicycle collides obliquely near this joint, it can be received without giving a strong impact. Furthermore, when press-fitting a preservative or hardening agent into the wooden beam, chemicals penetrate the thick bulging portion from the concave surface side, and a highly durable wooden beam that has been treated with chemicals to the inside of the member in a short time. It can be manufactured at low cost.

Since a metal reinforcing plate is attached to the back side of the wooden beam over substantially the entire length in the longitudinal direction, the tensile strength of the back side of the wooden beam, which is subjected to a tensile stress by a car collision, is reduced. It is possible to improve the safety as a guardrail device by improving a limit impact at which a wooden beam is broken by reinforcing with a high metal reinforcing plate.

[0028] Further, among the plurality of pillars, an intermediate pillar is provided with a mounting fixing part for fixing the two wooden beams to the pillar while abutting the longitudinal end positions of two adjacent wooden beams.
The mounting and fixing part is arranged between two wooden beams, both ends of which are adjacent to each other, and the center of the back side is applied to the column. The horizontal stays and the vertical stays arranged in an H shape are attached to the back side of both wooden beams along the longitudinal direction, and their ends are sandwiched between the vertical stays and the horizontal stays, Further, the reinforcing plate having these ends arranged in abutting manner, a first fastening member for fastening the wooden beam, the vertical stay, the reinforcing plate, and the horizontal stay, and at least the horizontal stay and the support are fastened and fixed. And a second fastening member, so that the vertical stay can prevent the crack from running from the butt end of the wooden beam, which is the mouth of the timber, to improve the durability. Further, the vertical stay can be provided with a reinforcing plate. one end By causing fixed, it is possible to improve the degree of freedom in design can be for example to the width of the reinforcing plate be set to about 1/3 of the width of the wooden beams to bear the tensile stresses occurring on the entire back surface of the wooden beams. By attaching the wooden beams reinforced in this way to one support from both sides via the horizontal stays, the wooden beams can be continuously attached with a simple bracket structure, and are no less than conventional steel guard rails. It can be easily constructed. In addition, when one wooden beam is deformed by the impact of an accident or the like, the horizontal stay is bent, so the adjacent wooden beams are not broken in a chain, and the wooden beams that have been directly impacted can be replaced. Repair cost can be reduced.

[0029]

[Brief description of the drawings]

FIG. 1 is a partially omitted front view of a guardrail device according to an embodiment of the present invention.

FIG. 2 is a rear view of the guardrail device.

FIG. 3 is a plan view of the guard rail device.

FIG. 4 is a sectional view taken along line AA of FIG. 1;

FIG. 5 is a partially omitted perspective explanatory view showing the back side of the guard rail device.

FIG. 6 is an explanatory perspective view showing a partially omitted assembly of the guard rail device.

FIG. 7 is a partially omitted perspective explanatory view showing a front side of the guard rail device.

FIG. 8 is an operation explanatory view showing a state where a load is applied to a wooden beam of the guardrail device.

FIG. 9 is an explanatory view showing a conventional guardrail device using a wooden beam.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Guard rail apparatus 12 Prop 14 Wooden beam 16 Swelling part 18 Depressed surface part 19 Flat surface part 20 Mounting fixing part 22 Horizontal stay 24 Vertical stay 26 Reinforcement plate 28 First fastening member 32 Second fastening member

Claims (3)

[Claims] 1. A plurality of columns that are erected in a row on the ground at required intervals, and a wooden beam that is mounted horizontally across the columns with the back side facing the side surfaces of these columns. The wooden beam has a bulging portion whose surface side bulges in an arc shape in a cross-sectional view, and a bulging portion which is arranged vertically separated from the bulging portion, and is inserted between the bulging portions and continuously connected to the bulging portions. A guard rail device comprising: a recessed surface portion formed; and a flat surface portion having a common portion on the front side formed on the back surface side of the wooden beam. 2. The guardrail device according to claim 1, wherein a metal reinforcing plate is attached to the back side of the wooden beam over substantially the entire length in the longitudinal direction. 3. A pillar located at an intermediate position of the plurality of pillars is provided with a mounting fixture for fixing the two wooden beams to the pillar while abutting longitudinal end positions of two adjacent wooden beams. A horizontal stay is placed over two adjacent wooden beams and the center on the back side is applied to the column. A horizontal stay and an H-shape are fixed vertically at positions near the butting ends on the back side of both wooden beams. A vertical stay and a wooden stay are attached to the back side of both wooden beams along the longitudinal direction, and their ends are sandwiched between the vertical stay and the horizontal stay. The reinforcing plate arranged in a butted manner, a first fastening member for fastening the wooden beam, the vertical stay, the reinforcing plate, and the horizontal stay, and a second fastening member for fastening and fixing at least the horizontal stay and the column. prepare for Guardrail according to claim 1 or 2, wherein that.