JP7109106B2 - Construction of signposts, signposts and post structures - Google Patents

Description

TECHNICAL FIELD The present invention relates to a structure of a signpost installed on a road or the like, a signpost, and a post structure.

Currently, many signposts are installed on the side of the road. Road signs, mirrors, and the like are attached to the sign posts. Such signposts contribute to the convenience of traffic for automobiles and pedestrians. In general, the sign post is buried in the ground in an upright state. However, these signposts are often bent due to collisions with automobiles or the like.

In this case, local buckling often occurs at the root, and repair work is being done using a sign generator or the like. However, when the fallen signpost is raised by a signage machine, the signpost may crack. In order to remove the danger, breaking off the sign post and reinstalling a new sign post or mirror installation post will cost a lot of money.

As a measure for preventing local buckling, there is one disclosed in Patent Document 1, for example. According to this, the signpost buckling prevention device prevents the signpost from local buckling at a position slightly above the ground, and the signpost can be gently bent even in the event of a car collision. It is

JP 2017-36631 A

However, the sign post buckling prevention device disclosed in Patent Document 1 is arranged outside the outer periphery of the sign post near the ground. Therefore, the outer diameter shape of the sign post near the ground is apparently increased. Depending on the installation location, it may be difficult to increase the outer diameter of the signpost due to restrictions on the installation space. When a car or a pedestrian passes near the signpost, there is a possibility that the signpost buckling prevention device may be stepped on. If the sign post is bent, it is repaired using a sign making machine or the like. At this time, there is a possibility that the anti-buckling device for the signpost placed on the outside of the outer periphery of the signpost may interfere with the work.

In addition, in a column structure in which a fixed beam is horizontally connected to a column built on the ground, excessive stress is applied to the connection between the column and the fixed beam due to a vehicle collision, strong wind, earthquake, or other disaster. , local buckling may occur near the connection between the column and the fixed beam.

The present invention has been made in view of the above circumstances, and improves the degree of freedom of installation space by preventing local buckling of the signpost near the ground without changing the outer diameter shape of the signpost. The purpose is to improve the passability of pedestrians and automobiles near the sign post. Another object of the present invention is to provide a sign post and its structure that can be configured so as to be hard to bend or gently bend even when a car or the like collides with it.
In addition, in a column structure in which fixed beams are connected horizontally to columns erected on the ground, local buckling is prevented near the connection between the column and fixed beams, and even if an impact is applied, bending is difficult or gentle. An object of the present invention is to provide a column structure that can be configured to bend.

In order to solve the above problems, the present invention has the following configurations.

A signpost structure according to an embodiment of the present invention is a signpost structure that is used by being buried in the ground in an upright state, wherein the signpost has a substantially predetermined outer diameter. , a hollow tubular member having a predetermined inner diameter and a predetermined wall thickness, wherein the marker post is buried in the ground and extends from a first position below the ground level to the ground level. The predetermined wall thickness is constant over a first range up to a second position above the height by a predetermined distance, and the hollow interior reinforces the bending strength of the marker post in the first range. A reinforcing member is arranged for

Further objects or other features of the present invention will be made clear by preferred embodiments described below with reference to the accompanying drawings.

According to the present invention, by preventing the local buckling of the signpost near the ground without changing the outer diameter shape of the signpost, the flexibility of the installation space is improved, and pedestrians and vehicles near the signpost are prevented from etc. can be improved. Furthermore, it can be constructed so that it does not bend easily or bends gently even in the event of a collision with an automobile or the like.

FIG. 1 is an overall view of a road sign using a sign post according to Embodiment 1. FIG. FIGS. 2(a) and 2(b) are diagrams showing other examples of the sign post. 3 is a longitudinal sectional view showing the internal structure of the sign post according to Embodiment 1. FIG. FIG. 4 is a table showing simulation calculation results of the geometrical moment of inertia of the marker post. 5(a) and 5(b) are cross-sectional views showing the internal structure of the marker post according to Embodiment 2. FIG. FIG. 5(a) is a cross-sectional view taken along line Va-Va in FIG. 5(b). FIG. 5(b) is a cross-sectional view taken along line Vb-Vb of FIG. 5(a). 6(a) and 6(b) are cross-sectional views showing the internal structure of a marker post according to Embodiment 3. FIG. FIG. 6(a) is a cross-sectional view taken along line VIa--VIa of FIG. 6(b). FIG. 6(b) is a cross-sectional view taken along line VIb--VIb of FIG. 6(a). 7A and 7B are cross-sectional views showing the internal structure of a marker post according to Embodiment 4. FIG. FIG. 7(a) is a cross-sectional view taken along line VIIa-VIIa in FIG. 7(b). FIG. 7(b) is a cross-sectional view taken along line VIIb--VIIb of FIG. 7(a). 8A and 8B are cross-sectional views showing the internal structure of a marker post according to Embodiment 5. FIG. FIG. 8(a) is a cross-sectional view taken along line VIIIa-VIIIa in FIG. 8(b). FIG. 8(b) is a cross-sectional view taken along line VIIIb--VIIIb of FIG. 8(a). 9(a) and 9(b) are cross-sectional views showing the internal structure of a marker post according to Embodiment 6. FIG. FIG. 9(a) is a cross-sectional view taken along line IXa-IXa of FIG. 9(b). FIG. 9(b) is a cross-sectional view taken along line IXb--IXb of FIG. 9(a). 10(a) and 10(b) are cross-sectional views showing the internal structure of a marker post according to Embodiment 7. FIG. FIG. 10(a) is a cross-sectional view taken along line Xa-Xa in FIG. 10(b). FIG. 10(b) is a cross-sectional view taken along line Xb--Xb in FIG. 10(a). FIG. 11 is a cross-sectional view showing the internal structure of the sign post according to the eighth embodiment. FIG. 11(a) is a cross-sectional view taken along line XIa-XIa of FIG. 11(b). FIG. 11(b) is a cross-sectional view taken along line XIb--XIb of FIG. 11(a). FIG. 12 is a diagram showing another example of the sign post. FIG. 13 is a diagram showing another example of the sign post. 14(a), (b), (c) and (d) are cross-sectional views showing the internal structure of a column member according to Embodiment 9. FIG. FIG. 14(a) is a cross-sectional view taken along line XIVa-XIVa in FIG. 14(b). FIG. 14(b) is a cross-sectional view along line XIVb-XIVb of FIG. 14(a). FIG. 14(c) is a cross-sectional view taken along line XIVc-XIVc in FIG. 14(d). FIG. 14(d) is a cross-sectional view along line XIVd-XIVd of FIG. 14(c). 15(a), (b) and (c) are sectional views showing the internal structure of a fixed beam according to Embodiment 9. FIG. FIG. 15(a) is a cross-sectional view along line XVb-XVb of FIG. 15(b) or line XVc-XVc of FIG. 15(c). FIG. 15(b) is a cross-sectional view taken along line XVa--XVa of FIG. 15(a). FIG. 15(c) is a cross-sectional view taken along line XVa--XVa in FIG. 15(a). 16(a), (b) and (c) are sectional views showing the internal structure of a fixed beam according to Embodiment 9. FIG. FIG. 16(a) is a cross-sectional view along line XVIb-XVIb in FIG. 16(b) or line XVIc-XVIc in FIG. 16(c). FIG. 16(b) is a cross-sectional view taken along line XVIa--XVIa of FIG. 16(a). FIG. 16(c) is a cross-sectional view taken along line XVIa--XVIa of FIG. 16(a).

[Embodiment 1]
Embodiment 1 of the present invention will be described below with reference to the drawings.

<Description of the sign post>
FIG. 1 is an overall view of a road sign 1 according to Embodiment 1 of the present invention. A road sign 1 generally comprises a sign post 2 and a sign plate 3 . The sign plate 3 is a plate-like member fixedly attached to the vicinity of the upper end portion of the sign post 2 or the like, and is generally made of a metal plate such as steel or aluminum. On at least one surface (one side surface) of the sign plate 3, patterns, characters, and the like are formed as sign information. As a result, the function of giving information to pedestrians and automobiles (hereinafter collectively referred to as passers-by and the like) passing nearby and calling attention to them can be exhibited. As an example of the sign information, sign figures such as speed limit, stop, no parking, etc. can be enumerated.

The signpost 2 has a function of displaying the signboard 3 at a certain height so that the signboard 3 can be easily recognized by passers-by and the like. The sign post 2 is generally configured by a metallic circular tube such as steel. For example, a steel pipe having an outer diameter of about 60 mm to 80 mm and a wall thickness of about 2 mm to 4 mm is used as the marker post 2 . There are various lengths of the sign post 2, and for example, a length of about 2 m to 5 m is often used. The sign plate 3 is attached to the vicinity of the upper end portion of the sign post 2 via a fixing metal fitting 14 so that passers-by and the like can easily see it from a distance. A lower part of the signpost 2 is buried in the ground 4. - 特許庁The sign post 2 is installed so as to stand upright from the ground surface 4a.

The sign post 2 is not necessarily limited to a straight steel pipe. For example, the sign post 2a shown in FIG. Some are bent. However, many of the signposts (2, 2a, 2b) have a substantially straight shape in the portion buried in the ground 4. As shown in FIG.

<Internal structure of the sign post>
FIG. 3 is a cross-sectional view showing the internal structure of the signpost 2 according to the first embodiment. In addition, FIG. 3 shows a cross-sectional view along the extending direction of the marker post 2 . Similarly, cross-sectional views shown below show cross-sectional views in the extending direction of the marker post unless otherwise specified. FIG. 3 shows the vicinity of the position corresponding to the height of the ground surface 4a when the marker post 2 is installed on the ground 4. As shown in FIG. In this sign post 2, the lower part of the sign post 2 is buried in the ground 4b. Also, most of the sign post 2 is arranged to stand on the ground surface 4a. The height position corresponding to the height of the ground surface 4a of the marker post 2 is defined as position P0. In addition, when viewed from the position P0, the underground side is referred to as the lower side, and the ground side (the side with the sign plate 3) is referred to as the upper side.

The indicator post 2 has an outer diameter (first outer diameter) having a constant value and an inner diameter having a constant value in a portion other than a first range 5 (see FIG. 3, which will be described later), which is a range including the position P0. (first inner diameter). In other words, the marker post 2 is formed of a tubular member having a constant thickness (thickness t1) in the portion other than the first range 5. As shown in FIG. For example, in the first embodiment, the marking post 2 is a steel pipe having an outer diameter of 60.5 mm and a wall thickness of 2.8 mm in areas other than the first range 5 . Of course, the sign post 2 is not limited to a circular pipe as long as it is a tubular member. Depending on the case, the present invention can be applied to a marker post made of a triangular tubular member with a triangular cross section, a polygonal tubular member such as a square tubular member with a square cross section, an elliptical tubular member with an elliptical cross section, or the like. .

The first range 5 is a range from a first position P1 below the ground surface 4a to a second position P2 above the ground surface 4a by a predetermined distance L, as shown in FIG. The marker post 2 has a constant thickness (t1) at least in the first range 5 (in the first embodiment, the thickness t1 is set to 2.8 mm). That is, in Embodiment 1, the cylindrical member forming the marker post 2 has a constant predetermined thickness (t1) as a whole.

The predetermined distance L is, for example, 10 mm. That is, the second position P2 is, for example, a position 10 mm above the position P0. The predetermined distance L may be 0 mm or more, preferably 5 mm or more. Furthermore, it is more preferable that the predetermined distance L is 10 mm or more.

In general, when a large external force (bending moment force) is applied from the outside by an automobile or the like colliding with a sign post (not applicable to the present invention), the sign post buckles and bends at a position about 10 mm above the ground surface. There are many. Therefore, by increasing the secondary moment of area of the marker post at a position about 10 mm above the ground surface (strengthening the strength against the bending moment force), buckling is prevented and the marker column bends gently without breaking. preferably configured. If the sign post is gently bent, it can be relatively easily restored to its original upright position by using a sign raising machine or the like.

In addition, when the sign post (not applicable to the present invention) buckles at a position about 10 mm above the ground surface, the sign post may wrinkle in the lateral direction (horizontal direction). The wrinkles are caused by the sign post being dented inward (toward the center of the circular cross section). However, if the wall thickness of the sign post is increased at a position about 10 mm above the ground surface, or if another member (reinforcing member) for reinforcing the inside of the sign note is arranged, the sign post becomes less likely to dent inward. As a result, wrinkles are less likely to occur. That is, buckling at this position is less likely to occur.

ここで、ｔ、β、Ｅ、σ_Ｙの各パラメータは以下の通り定義される。
Ｌｍａｘ：所定距離の上限値
ｔ：肉厚
β：有効座屈長（下端完全固定、上端ピン支持の場合は0.7）
Ｅ：ヤング率
σ_Ｙ：降伏応力

ここで、Ｌｍａｘは、標識柱の肉厚ｔに依存し、標識柱の外径には依存しないことに留意する必要がある。従って、標識柱において、地表からＬｍａｘ以下の位置の肉厚を大きくすることで、実質的に塑性変形を伴う局部座屈を防止できることが分かる。さらに、標識柱の肉厚が大きい範囲を地表からＬｍａｘ以下とすることで、標識柱の重量の低減も可能となる。Next, the upper limit of the predetermined distance L can be obtained as follows. Lmax is defined as a predetermined distance L at which the sign post (not applicable to the present invention) does not buckle and bend even when a large external force (bending moment force) is applied from the outside when a car or the like collides with the sign post. . Using the well-known Euler's formula for elastic buckling of a long column, the upper limit value Lmax of the predetermined distance is expressed by the following equation. Here, the upper limit value Lmax of the predetermined distance can be defined as the length of the compression field that causes buckling deformation at the same time as the elastic limit (yield).

Here, the parameters t, β, E, and _σY are defined as follows.
Lmax: Upper limit of predetermined distance t: Thickness β: Effective buckling length (0.7 in the case of completely fixed lower end and pin supported upper end)
E: Young's modulus σ _Y : Yield stress

Here, it should be noted that Lmax depends on the wall thickness t of the marker post and does not depend on the outer diameter of the marker post. Therefore, it can be seen that local buckling accompanied by plastic deformation can be substantially prevented by increasing the wall thickness of the sign post at a position below Lmax from the ground surface. Furthermore, the weight of the signpost can be reduced by setting the range of the large wall thickness of the signpost to Lmax or less from the ground surface.

For example, if the sign post is made of steel, a typical Young's modulus is about 200 GPa. Assuming that the yield stress is 180 MPa, Lmax can be obtained as follows for the wall thickness t of the sign post. When the thickness t is 2.3 mm, Lmax is 99.3 mm. When the thickness t is 2.8 mm, Lmax is 120.9 mm. When the thickness t is 3.2 mm, Lmax is 138.2 mm.

At a position near the ground surface 4a, the outer diameter of the marker post 2 is constant, and it has a simple cylindrical shape in appearance. Therefore, no extra space is required at the place where the sign post 2 is installed. It is possible to select the installation location with a high degree of freedom as with general signposts. Also, even after the signpost 2 is installed, when a passerby passes near the signpost 2, there is no member in the vicinity that would interfere with the passage. Therefore, it is possible to improve the passability of passers-by.

A bottom plate portion 7 is arranged in the hollow interior 6 of the marker post 2 below the first position P1. The bottom plate portion 7 is for preventing the granular material 8 as a reinforcing member, which will be described later, from falling downward. Although the material of the bottom plate portion 7 is not particularly limited, it may be made of metal such as iron or aluminum. Also, the bottom plate portion 7 may block the hollow interior 6 of the marker post 2 between the upper side and the lower side. However, it is not necessary to block the hollow interior 6 completely as long as it exhibits the function of preventing the granules 8 from falling downward. For example, it may have through holes smaller than the grains 8 or have a lattice structure. Also, the bottom plate portion 7 may be a member separate from the marker post 2 and fixed to the hollow interior 6 by means of welding, heat caulking, press fitting, or the like.

A plurality of granules (reinforcing members) 8 are filled above the bottom plate portion 7 in the hollow interior 6 . The granules 8 are filled over the first range 5 from the first position P1 to the second position P2. Granules 8 are reinforcing members of relatively small size. The material of the granules 8 is not particularly limited, but in order to exhibit a sufficient reinforcing function, metal materials such as iron, aluminum, brass, etc., as well as sand, stone, glass, etc. can be used. The granular material 8 may be a small-diameter sphere, or may be a small-sized regular tetrahedron or regular hexahedron. Also, the granular material 8 may be an aggregate of particles having irregular sizes and shapes, such as sand or stone. When the granular material 8 is a small-diameter sphere, it is preferable that the diameter is, for example, about 3 mm to 20 mm. When the granular material 8 is a small regular tetrahedron or regular hexahedron, the length of one side is preferably about 3 mm to 20 mm. In any case, it is preferable that the first area 5 has a high packing rate of the granular material 8 (low porosity).

In the first range 5, the hollow interior 6 is filled with the granular material 8, so that the marker post 2 has high strength in the vicinity of the ground surface 4a. Due to the presence of the granular material 8, the same effect as the increase in the apparent cross-sectional area of the marker post 2 in the first area 5 can be exhibited. As a result, the moment of inertia of area of the marker post 2 at this portion can be increased. In addition, since frictional force is generated between the plurality of granular bodies 8 or between the granular bodies 8 and the inner surface of the marker post 2, the strength against bending can be further improved. As a result, the sign post 2 is designed not to be easily bent or damaged by a collision with a car or the like. It is breakage-proof, bend-resistant, and bends gently if it does.

In the above description, the case where the outer diameter of the marker post 2 is 60.5 mm, the predetermined thickness is 2.8 mm, and the second position P2 is 10 mm has been described. These numerical values are examples of the sign post 2 of the present invention, and the gist of the present invention is not necessarily limited to the numerical values described here.

In addition, stress concentration when an automobile or the like collides with the signpost 2 and stress concentration during correction work to correct the bent signpost 2 generally occur about 10 mm above the ground surface 4a. many. Therefore, it is preferable to set the second position P2 to 10 mm or more. Of course, it is more preferable to set the second position P2 to a larger value, such as 20 mm.

<Simulation calculation of geometric moment of inertia>
In the first area 5, by filling the hollow interior 6 with the granular material 8 as a reinforcing member, the same effect as increasing the apparent cross-sectional area of the marker post 2 in the first area 5 can be obtained. An increase in the apparent cross-sectional area of the marker post 2 can be regarded as substantially the same as an increase in the apparent thickness of the marker post 2 . As a result, in this first range, the moment of inertia of area of the marker post 2 becomes larger than that of the other portions.

Here, in order to examine how thick the wall thickness of the first area 5 of the sign post 2 should be set to obtain a sufficient reinforcing effect, a simulation calculation result for strength (flexural rigidity) was obtained. It is shown below. The strength of a cylindrical member can be evaluated by the value of the moment of inertia of area. The geometric moment of inertia of the marker post 2 of Embodiment 1 as a circular tubular member is given by the following equation (1).

I=π(D ⁴ −d ⁴ )/64 − (formula (1))
here,
I: Geometric moment of inertia of the marker post 2 D: Outer diameter of the marker post 2 d: Inner diameter of the marker post 2

FIG. 4 shows the calculation results of the geometrical moment of inertia when the outer diameter D of the marker post 2 was changed from 60.5 mm and the inner diameter d from 2.3 mm to 30.25 mm. In the table of FIG. 4, the thickness t (=(D−d)/2) of the marker post 2 and the solid cross-sectional moment of inertia when the marker post 2 is not a hollow circular pipe but a solid cylinder If, and the ratio of If to I (hollow solid ratio R=I/If) are also described. Note that the case where the inner diameter of the marker post 2 is 30.25 mm substantially corresponds to the case where the marker post 2 is not a circular pipe (hollow) but a cylinder (solid).

As can be seen from the table of FIG. 4, as the wall thickness t of the marker post 2 increases, the value of the moment of inertia I increases and the strength (bending rigidity) increases. The relationship between the value of the ratio between the wall thickness t and the outer diameter D (thickness outer diameter ratio=t/D) and the hollow/solid ratio R is shown below.
When thickness t=5 mm (t/D=0.0826), R=0.515
When thickness t=10 mm (t/D=0.165), R=0.799
When thickness t=17mm (t/D=0.281), R=0.963
When thickness t=20 mm (t/D=0.331), R=0.987

That is, when the thickness-outside-diameter ratio is 0.281 or more (t≧17 mm), the hollow/solid ratio R exceeds 95%. At this time, it can be said that the flexural rigidity of the cylindrical member is not much different from the flexural rigidity of the solid columnar member. The filling of the granular material 8 increases the apparent thickness t of the marker post 2 in the first area 5 . For example, when the apparent wall-thickness-outside-diameter ratio (t/D) is 0.281 or more, the hollow/solid ratio is 95% or more, and the bending rigidity in the first range 5 of the marker post 2 is that of a solid cylindrical member. will not change much.

[Embodiment 2]
5(a) and 5(b) are sectional views showing the internal structure of the marker post 2c according to the second embodiment. FIG. 5(a) is a cross-sectional view taken along a plane perpendicular to the extending direction of the marker post 2c. FIG. 5(b) is a cross-sectional view taken along a plane along the extending direction passing through the center of the marker post 2c. In addition, in FIG. 5A, the cross section is viewed from above.

In the marker post 2 of Embodiment 1, an example in which the hollow interior 6 in the first area 5 is filled with the granular material 8 as a reinforcing member has been described. In the second embodiment, a plurality of rod-like members 9 extending along the extension direction of the marker post 2c are arranged within the first area 5 as reinforcing members in the hollow interior 6 of the marker post 2c.

The material of the rod-shaped member 9 is not particularly limited, but it can be made of metal such as iron, aluminum, brass, or the like. The extension length of the rod-like member 9 preferably covers the entire first range 5 . That is, it is preferable that the rod-shaped member 9 placed on the bottom plate portion 7 of the marker post 2c extends to the second position P2. The cross-sectional shape of the rod-like member 9 is not particularly limited, but a circular cross-sectional shape and a polygonal cross-sectional shape can be adopted. Regarding the cross-sectional size of the rod-like member 9, for example, when it has a circular cross-sectional shape, it is preferable that the diameter is about 3 mm to 20 mm. Moreover, in the case of a polygonal cross-sectional shape, it is preferable that the length of one side is about 3 mm to 20 mm. Moreover, it is preferable that the porosity in the first area 5 is as small as possible.

The bottom plate portion 7 is made of, for example, the same metal material as the rod-shaped member 9, and is arranged below the first position P1 in the hollow interior 6 of the marker post 2c. In Embodiment 2, the bottom plate portion 7 may be fixed to the inner surface of the marker post 2c by, for example, adhesion, welding, press-fitting, thermal caulking, bolt (or screw) fastening from the side, or the like.

Other matters (configuration, arrangement, etc.) of the signpost 2c in the second embodiment are substantially the same as those of the signpost 2 in the first embodiment, so description thereof will be omitted. All the cross-sectional sizes of the plurality of rod-shaped members 9 in the second embodiment are substantially the same. However, the cross-sectional size of each rod-shaped member 9 is not particularly limited, and each may have a different cross-sectional size.

[Embodiment 3]
6(a) and 6(b) are sectional views showing the internal structure of a marker post 2d according to Embodiment 3. FIG. FIG. 6(a) is a cross-sectional view taken along a plane perpendicular to the extending direction of the marker post 2d. FIG. 6(b) is a cross-sectional view taken along a plane along the extending direction passing through the center of the marker post 2d. In addition, in FIG. 6A, the cross section is viewed from above.

In the sign post 2c of the second embodiment, an example in which the cross-sectional sizes of the plurality of rod-shaped members 9 are substantially the same has been described. In Embodiment 3, an example in which the cross-sectional sizes of the rod-shaped members 9 are different will be described. In addition, except that a plurality of rod-shaped members 9 each having a different cross-sectional size are arranged in the hollow interior 6, the configuration and arrangement are substantially the same as those of the marker post 2c of the second embodiment. Description is omitted.

In Embodiment 3, the plurality of rod-shaped members 9 have different cross-sectional sizes. For example, a rod-shaped member 9 having a relatively small cross-sectional size is arranged on the pipe center side 10 of the marker post 2d. Further, a rod-shaped member 9 having a relatively large cross-sectional size is arranged on the peripheral edge side 11 of the pipe. The cross-sectional size of the rod-like member 9 gradually increases from the tube center side 10 toward the tube peripheral edge side 11 . Here, the cross-sectional size of the rod-shaped member 9 can be regarded as substantially the same as the cross-sectional area of the rod-shaped member 9 .

By making the cross-sectional size of the rod-shaped member 9 on the pipe center side 10 smaller than that of other portions, the filling rate of the rod-shaped member 9 on the pipe center side 10 can be improved (in other words, the gap on the pipe center side 10 rate can be reduced). In addition, by making the cross-sectional size of the pipe peripheral edge side 11 larger than that of other portions, the number of rod members 9 used can be reduced without sacrificing the filling rate.

[Embodiment 4]
7A and 7B are cross-sectional views showing the internal structure of a marker post 2e according to Embodiment 4. FIG. FIG. 7(a) is a cross-sectional view taken along a plane perpendicular to the extending direction of the marker post 2e. FIG. 7(b) is a cross-sectional view taken along a plane along the extending direction passing through the center of the marker post 2d. In addition, in FIG. 7A, the cross section is viewed from above.

In the marker post 2 of Embodiment 1, an example in which the hollow interior 6 in the first area 5 is filled with the granular material 8 as a reinforcing member has been described. In the fourth embodiment, a plurality of tubular members 12 extending along the extension direction of the marker post 2e are arranged within the first area 5 as reinforcing members in the hollow interior 6 of the marker post 2e.

The plurality of tubular members 12 each have a different diameter, and adjacent tubular members 12 are inserted into the hollow interior of the tubular members 12 . The plurality of tubular members 12 are arranged substantially concentrically, and in a vertical cross-sectional view, they are arranged like the annual rings of a tree.

The material and extension length of the tubular member 12 are the same as those of the rod-shaped member 9 of the second embodiment. It is preferable that the inner diameter of the tubular member 12 and the outer diameter of the tubular member adjacent to the inner side are close to each other because this contributes to reducing the porosity.

Other matters (configuration, arrangement, etc.) of the sign post 2e in the fourth embodiment are substantially the same as those of the sign post 2 in the first embodiment, so description thereof will be omitted.

[Embodiment 5]
8A and 8B are cross-sectional views showing the internal structure of a marker post 2g according to Embodiment 5. FIG. Fig.8 (a) is sectional drawing cut|disconnected by the plane orthogonal to the extension direction of 2 g of sign posts. FIG. 8(b) is a cross-sectional view taken along the extending direction passing through the center of the marker post 2g. In addition, in FIG. 8A, the cross section is viewed from above.

In the sign post 2c of the second embodiment, an example has been described in which the rod-shaped member 9 as a reinforcing member is placed on the bottom plate portion 7 and extended to the second position P2. In Embodiment 2, except that the bottom plate portion 7 is fixed to the inner surface of the marker post 2g by a wedge member 19, the configuration and arrangement are substantially the same as those of the marker post 2c of Embodiment 2. detailed description is omitted.

A through hole 20 is formed in a part of the bottom plate portion 7 . The wedge member 19 is a member having a wedge shape (for example, the wedge member 19 having a truncated cone shape is used in FIG. 8), and is made of, for example, metal. When the bottom plate portion 7 is positioned at a predetermined position (a position below the first position in the hollow interior 6) and the wedge member 19 is driven into the through hole 20 from below, the bottom plate portion 7 is pushed outward (that is, It expands and deforms in the cross-sectional direction of the signpost 2g). Due to this expansion deformation, the bottom plate portion 7 is fixed at a predetermined position in the hollow interior 6 .

[Embodiment 6]
9(a) and 9(b) are cross-sectional views showing the internal structure of a marker post 2h according to Embodiment 6. FIG. FIG. 9(a) is a cross-sectional view taken along a plane perpendicular to the extending direction of the marker post 2h. FIG. 9(b) is a cross-sectional view cut along the extending direction passing through the center of the marker post 2h. In FIG. 9A, the cross section is viewed from below.

In the sign post 2g of the fifth embodiment, an example in which the rod-shaped member 9 as a reinforcing member is placed on the bottom plate portion 7 and extended to the second position P2 has been described. In Embodiment 6, the upper plate portion 7b is arranged in the hollow interior 6 above the second position P2. Further, the rod-like member 9 extends downward from the upper plate portion 7b and reaches the first position P1. In other words, in the fifth embodiment, the rod-shaped member 9 is positioned on the bottom plate portion 7 . On the other hand, in Embodiment 6, the configuration is different from Embodiment 5 in that the rod-shaped member 9 is positioned below the upper plate portion 7b, and the positional relationship between the plate portion and the rod-shaped member 9 is inverted upside down. . Except for this point, the signpost 2h of the sixth embodiment is substantially the same in configuration, arrangement, etc. as the signpost 2g of the fifth embodiment, so detailed description thereof will be omitted.

As for the method of fixing the upper plate portion 7b to the hollow inside 6, as in the fifth embodiment, a wedge member 19 is driven into the through-hole 20 (see FIG. 9). , various methods can be used, such as a method of adhering to the inner surface of the marker post 2h, a method of welding, a method of press-fitting, a method of heat caulking, and a method of bolting (or screwing) from the side.

In the sixth embodiment, since the rod-shaped member 9 is positioned below the upper plate portion 7b, it is necessary to fix the rod-shaped member 9 to the bottom surface of the upper plate portion 7b in advance. Various methods such as adhesion, welding, and bolt (or screw) fastening can be used to fix the rod-shaped member 9 to the upper plate portion 7b. The rod-like member 9 can be fixed to the upper plate portion 7b from above in advance, and the upper plate portion 7b can be inserted into the hollow interior 6 and fixed. For example, there is an advantage that the operation of collectively inserting the upper plate portion 7b and the rod-shaped member 9 into an existing sign post from above can be easily performed.

[Embodiment 7]
FIGS. 10A and 10B are two-sided views (partial cross-sectional views) showing the structure in the vicinity of the ground surface 4a of the civil engineering column member 2f (hereinafter referred to as the column member 2f) according to Embodiment 5. FIG. The column member 2f is planted in the ground 4, not buried in the ground 4b. Specifically, a flange portion 17 is formed on the outer periphery of the column member 2f, and the flange portion 17 is fixed to the ground surface 4a by anchor bolts 18. As shown in FIG.

The reinforcing member (for example, the granular material 8) of the present invention can be applied to the first area 5 of the column member 2f as well. In addition, in the column member 2f, the first position P1 coincides with the height of the ground surface 4a. In the column member 2f, the flange portion 17 corresponds to the bottom plate portion and prevents the granular material 8 from falling.

[Embodiment 8]
11(a) and 11(b) are cross-sectional views showing the internal structure of a marker post 2i according to Embodiment 8. FIG. FIG. 11(a) is a cross-sectional view taken along a plane perpendicular to the extending direction of the marker post 2i. FIG. 11(b) is a cross-sectional view taken along a plane along the extending direction passing through the center of the marker post 2i. In addition, in FIG. 11A, the cross section is viewed from above.

In the marker post 2 of Embodiment 1, an example in which the hollow interior 6 in the first area 5 is filled with the granular material 8 as a reinforcing member has been described. In the eighth embodiment, the hollow interior 6 of the marker post 2i is filled with granular material 8 as a reinforcing member in the first area 5 between the tubular member 12 extending along the extension direction of the marker column 2i and the marker column 2i. ing.

The tubular member 12 is fixed to the bottom plate portion 7 by, for example, adhesion, welding, press-fitting, thermal crimping, bolting (or screwing) from the side, or the like. The bottom plate portion 7 is arranged downward as in the first embodiment.

According to the simulation calculation of the geometrical moment of inertia of the marker post 2i of the present embodiment, when the apparent thickness-to-outer-diameter ratio (t/D) is 0.281 or more, the hollow/solid ratio is 95% or more. Become. As a result, the flexural rigidity in the first region 5 of the marker post 2i is not much different from that of a solid cylindrical member.

In this embodiment, the hollow interior 6 of the marker post 2i is filled with granular material 8 as a reinforcing member in the first area 5 between the tubular member 12 extending along the extension direction of the marker column 2i and the marker column 2i. ing. However, instead of the granular material 8 as the reinforcing member, for example, the rod-shaped member of the second embodiment, the plurality of rod-shaped members with different cross-sectional sizes of the third embodiment, and the plurality of tubular members 12 with different diameters of the fourth embodiment are used as the tubular member 13. It can be arranged between the marker posts 2i, and this configuration also makes it possible to make the bending stiffness not much different from that of a solid cylindrical member, thus reducing the material used.
As a result, production costs such as processing costs and material costs can be reduced.

[Embodiment 9]
FIG. 12 is an overall view of a road sign 1 according to Embodiment 9 of the present invention.
12 and 13 are general views of a road sign 1 according to Embodiment 9 of the present invention. In FIG. 12, a road sign 1 has a pillar member 2j installed on the side of the road, a sign plate 3 installed at a height above the pillar member 2j where vehicles on the road do not come into contact, and a pillar to which the sign plate 3 is fixed. It is composed of a beam member 14a for connecting to the member 2j. In this embodiment, the column member 2j extends in a direction (first direction) substantially perpendicular to the ground surface 4a, and the beam member 14a extends in a direction (second direction) substantially parallel to the ground surface 4a. ing. However, the first direction and the second direction may be directions that intersect each other, and it is not necessary that the column member and the beam member are connected orthogonally. Also, in this embodiment, the pillar members 2j and 2k correspond to the sign pillars of the first embodiment. The column members (2j, 2k) are generally made of metal circular tubes such as steel. For example, the column members (2j, 2k) can be made of steel pipes having an outer diameter of approximately 150 mm to 350 mm and a wall thickness of approximately 4 mm to 15 mm. There are various lengths of the column members (2j, 2k), and for example, a length of about 7 m is often used. The sign plate 3 is mounted on the road via a beam member 14a so that passing vehicles and the like can easily be visually recognized even from a distance. The column members (2j, 2k) are not buried in the ground 4b, but planted in the ground 4. As shown in FIG. Specifically, a flange portion 17 is formed on the outer periphery of the column members (2j, 2k), and the flange portion 17 is fixed to the ground surface 4a by anchor bolts 18 fixed to the base portion 21. As shown in FIG. The beam member 14a is fixed to the column members (2j, 2k) by welding or bolts, for example. Further, in the present embodiment, the column member and the beam member are composed of cylindrical pipes, but steel pipes having polygonal cross sections such as triangular pipes, square pipes, and hexagonal pipes may be used.

FIG. 13 is a diagram showing an overall view of a road sign 1 in which a sign plate is installed above the roadway on a portal structure (post) installed across the roadway. In FIG. 13, one or more beam members 14a are provided between two or more pillar members 2k, and the sign plate 3 is fixed to the beam members 14a. FIGS. 14(a), (b), (c) and (d) are two-sided views (partial sectional views) showing the structure of the column members (2j, 2k) in FIGS. 12 and 13 near the ground surface 4a. be. 14(a) and (c) are cross-sectional views taken along a plane perpendicular to the extending direction of the column members (2j, 2k). 14(b) and (d) are cross-sectional views taken along a plane extending through the center of the column members (2j, 2k). In addition, in FIGS. 14A and 14C, the cross section is viewed from above.

As shown in FIG. 14(a), a plurality of tubular members 12 with different diameters extending along the extension direction of the column members (2j, 2k) and the column members (2j, 2k) are provided in the hollow interior 6 of the column members (2j, 2k). 2j, 2k) and the plurality of tubular members 12, granules 8 are filled in the first region 5 as reinforcing members. A cap 23 is provided to prevent the granules 8 from spilling. Similarly, as shown in FIG. 14(b), a plurality of tubular members 12 with different diameters extending along the extension direction of the column members (2j, 2k) are provided in the hollow interiors 6 of the column members (2j, 2k). Granules 8 are filled in the first area 5 as reinforcing members between the marker post 2j and the plurality of tubular members 12 . Similarly, as shown in FIG. 14(c), a plurality of tubular members 12 with different diameters extending along the extension direction of the column members (2j, 2k) in the hollow interior 6 of the column members (2j, 2k) and the columns A plurality of rod-shaped members 9 are filled in the first area 5 as reinforcing members between the members (2j, 2k) and the plurality of tubular members 12 . A plurality of rod members 9 are covered with a cap 23 so as not to protrude from between the column members (2j, 2k) and the plurality of tubular members 12.例文帳に追加Further, as shown in FIG. 14(d), a plurality of tubular members 12 with different diameters extending along the extension direction of the column members (2j, 2k) and columns A plurality of rod-shaped members 9 are filled in the first area 5 as reinforcing members between the members (2j, 2k) and the plurality of tubular members 12 .

15A, 15B, and 15C are sectional views showing the internal structure when the column members (2j, 2k) and the beam member 14a according to Embodiment 9 are connected using the flange 17. FIG. FIG. 15(a) is a cross-sectional view taken along a plane perpendicular to the extending direction of the beam member 14a. FIG. 15(b) is a cross-sectional view taken along a plane extending through the center of the beam member 14a. FIG. 15(c) is a cross-sectional view taken along a plane extending through the center of the beam member 14a. Note that the column members (2j, 2k) in FIG. 15(b) show a case where square steel pipes having a substantially square cross section are used, and the column members (2j, 2k) in FIG. 15(c) have a cross section of A case of using a substantially circular cylindrical steel pipe is shown. Moreover, in FIG. 15(a), the cross section is viewed from the side.

In FIG. 15(b), the column members (2j, 2k) indicate the connection between the plane portion of the square steel pipe and the beam member 14a. In the hollow interior 6 of the beam member 14a, a plurality of tubular members 12 having different diameters extending along the extension direction of the beam member 14a and a plurality of rod members 9 serving as reinforcing members are provided between the beam member 14a and the plurality of tubular members 12. , are filled in the first range 5 . A plurality of rod members 9 are covered with a cap 23 so as not to protrude from between the column members (2j, 2k) and the plurality of tubular members 12.例文帳に追加15(b) and (c), the first range 5 in the present embodiment is from the first position P1, which is the side surface of the column members (2j, 2k), to the column members (2j, 2k). The range is a predetermined distance L from the side surface to the second position P2 of the bulletin. Further, in FIG. 15(c), the column members (2j, 2k) indicate the connection between the curved surface portion of the cylindrical steel pipe and the beam member 14a. In the hollow interior 6 of the beam member 14a, a plurality of tubular members 12 having different diameters extending along the extension direction of the beam member 14a and a plurality of rod members 9 serving as reinforcing members are provided between the beam member 14a and the plurality of tubular members 12. , are filled in the first range 5 . A plurality of rod members 9 are covered with a cap 23 so as not to protrude from between the beam member 14 a and the plurality of tubular members 12 . In the beam member 14a shown in FIG. 15, the case where the rod-shaped member 9 is used as the reinforcing member has been described, but instead of the rod-shaped member 9, the grains 8 may be filled.

16(a), (b) and (c) are cross-sectional views showing the internal structure of directly connecting the column members (2j, 2k) and the beam member 14a according to the ninth embodiment by welding. FIG. 16(a) is a cross-sectional view taken along a plane perpendicular to the extending direction of the beam member 14a. FIG. 16(b) is a cross-sectional view taken along a plane extending through the center of the beam member 14a. FIG. 16(c) is a cross-sectional view taken along a plane extending through the center of the beam member 14a. Note that the column members (2j, 2k) in FIG. 16(b) show a case where square steel pipes having a substantially square cross section are used, and the column members (2j, 2k) in FIG. 16(c) have a cross section of A case of using a substantially circular cylindrical steel pipe is shown. Moreover, in FIG. 16A, the cross section is viewed from the side.

In FIG. 16(b), the column members (2j, 2k) indicate the connection between the plane portion of the square steel pipe and the beam member 14a. In the hollow interior 6 of the beam member 14a, a plurality of tubular members 12 having different diameters extending along the extension direction of the beam member 14a and a plurality of granular bodies 8 serving as reinforcing members are provided between the beam member 14a and the plurality of tubular members 12. , is filled in the first area 5 and covered with a cap 23 to prevent spillage. 16(b) and 16(c), the first range 5 in the present embodiment extends from the first position P1, which is the side surface of the column members (2j, 2k), to the column members (2j, 2k). It is a range up to a second position P2 laterally by a predetermined distance L from the side surface. Further, in FIG. 16(c), the column members (2j, 2k) indicate the connection between the curved surface portion of the cylindrical steel pipe and the beam member 14a. In the hollow interior 6 of the beam member 14a, a plurality of tubular members 12 having different diameters extending along the extension direction of the beam member 14a and a plurality of granular bodies 8 serving as reinforcing members are provided between the beam member 14a and the plurality of tubular members 12. , is filled in the first area 5 and covered with a cap 23 to prevent spillage. In the beam member 14a shown in FIG. 16, the case of using the granular material 8 as the reinforcing member has been described, but instead of the granular material 8, the rod-shaped member 9 may be filled.

Like the road sign 1 described in the ninth embodiment, the structure of a signpost composed of a post member and a beam member connected to the post member, or in the post structure, for example, collision of vehicles, strong winds, earthquakes, etc. This event causes excessive stress to be applied to the connection between the column member and the beam member. As a result, local buckling may occur in the vicinity of the connecting portion between the column member and the beam member. In the column structure (2j, 2k) of the ninth embodiment, by providing a reinforcing member within the first range 5 of the beam member, it is possible to exhibit the effect of increasing the apparent thickness of the beam member 14a. Therefore, the moment of inertia of area in the first area 5 can be improved, and the bending rigidity of the beam member can be improved. Furthermore, the bending rigidity of the beam member can be further increased by the contact friction between the reinforcing members. The elasticity of the reinforcing member and the tubular member absorbs and converges vibration, and the damping action improves the earthquake resistance.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to these, and various modifications and changes are possible within the scope of the gist thereof. In Embodiments 1 to 9 above, the examples in which a plurality of granular bodies 8, a plurality of rod-shaped members 9, and a plurality of tubular members 12 are used as reinforcing members have been described. These reinforcing members exhibit the effect of increasing the apparent wall thickness of the sign post, improve the moment of inertia of area in the first area 5, and contribute to strengthening the bending rigidity. Furthermore, the contact friction between the plurality of reinforcing members further increases the flexural rigidity of the sign post. In addition, the same effect can be expected not only for the sign post but also for a fixed beam connected to the sign post. In other words, by providing the reinforcing member in the first area 5, the effect of increasing the apparent thickness of the fixed beam is exhibited, the geometrical moment of inertia in the first area 5 is improved, and the bending rigidity is enhanced. do. Furthermore, the contact friction between the plurality of reinforcing members can further increase the flexural rigidity of the sign post.

The present invention includes, for example, the following gists.

[Purpose 1]
A structure of a sign post that is used by being buried in the ground in an upright state, wherein the sign post has a substantially constant outer diameter, an inner diameter that is a predetermined inner diameter, and a wall thickness that is It is a hollow tubular member with a predetermined thickness, and when the marker post is buried in the ground, it extends from a first position below the height of the ground surface to a second position above the height of the ground surface by a predetermined distance. The predetermined wall thickness is constant during the first range, and a reinforcing member is arranged in the hollow interior in the first range to reinforce the bending strength of the marker post. structure.

[Purpose 2]
The predetermined distance may be 10 mm or more.

[Purpose 3]
The reinforcing member may be a granule, and a plurality of the granules may fill the hollow interior of the first area.

[Purpose 4]
The granules may be any one of a sphere, a regular tetrahedron and a regular hexahedron.

[Purpose 5]
The reinforcing member may be a rod-shaped member extending along the extension direction of the marker post, and a plurality of the rod-shaped members may be arranged inside the hollow in the first range.

[Purpose 6]
The cross-sectional areas of the plurality of rod-shaped members in the plane perpendicular to the extension direction of the marker post are different, and the cross-sectional areas of the rod-shaped members extend from the pipe center side of the marker post toward the pipe peripheral side in the hollow interior. The plurality of rod-shaped members may be arranged such that the .DELTA.

[Purpose 7]
The reinforcing member may be a tubular member extending along the extension direction of the marker post, and a plurality of tubular members having different diameters may be arranged substantially concentrically within the hollow interior of the first range. .

[Purpose 8]
A tubular member 12 extending along the extension direction of the marker post may be arranged in the hollow interior of the marker post, and the reinforcing member may be arranged between the tubular member and the marker post.

[Purpose 9]
A geometrical moment of inertia in the first range may be larger than a geometrical moment of inertia in a portion other than the first range.

[Purpose 10]
A sign post having the structure of the above sign post.

[Purpose 11]
A column member extending in a first direction and a beam member coupled to the column structure and extending in a second direction crossing the first direction are provided. The beam member is a hollow tubular member having a constant outer diameter, an inner diameter of a predetermined inner diameter, and a wall thickness of a predetermined thickness. The predetermined thickness is constant in a first range from the side surface to a second position separated by a predetermined distance in the direction in which the beam member extends, and the beam is provided inside the hollow in the first range. A column structure in which reinforcing members are arranged to reinforce the bending strength of members.

[Purpose 12]
The reinforcing member may be a granule, and a plurality of the granules may fill the hollow interior of the first area.

[Purpose 12]
The reinforcing member may be a rod-shaped member extending along the second direction, and a plurality of the rod-shaped members may be arranged inside the hollow in the first range.

L: Predetermined distance P0: Position P1: First position P2: Second position 1: Road signs 2, 2a to 2e, 2g, 2h, 2i: Signposts 2j, 2k: Column members 2f: Civil engineering column members (columns)
3: Sign board 4: Ground 4a: Ground surface 4b: Underground 5: First range 6: Hollow inside 7: Bottom plate part 7b: Upper plate part 8: Granular body (reinforcing member)
9: Rod-shaped member (reinforcing member)
10: Pipe center side 11: Pipe peripheral side 12: Tubular member 14: Fixing bracket 14a: Beam member 17: Flange portion 18: Anchor bolt 19: Wedge member 20: Through hole 21: Base portion 22: Plate material 23: Cap 24: road

Claims (10)

A structure of a signpost used by being buried in the ground in an upright state,
The marker post is a hollow tubular member having a constant outer diameter, a predetermined inner diameter, and a predetermined wall thickness,
The predetermined thickness is constant in a first range from a first position below the height of the ground surface to a second position above the height of the ground surface by a predetermined distance when the sign post is buried in the ground. can be,
In the first range, a reinforcing member is arranged inside the hollow for reinforcing the bending strength of the marker post,
the reinforcing member includes a plurality of rod-shaped members or a plurality of tubular members extending along the extension direction of the marker post;
A bottom plate portion is disposed below the first position in the hollow interior of the tubular member,
One end of the plurality of rod-shaped members or the plurality of tubular members constituting the reinforcing member is placed on the bottom plate portion and the other end is not fixed and is a free end,
A construction of a signpost, wherein said plurality of rod-like members or said plurality of tubular members are unattached and operably disposed within said hollow interior of said first area.
The structure of a signpost according to claim 1, wherein said plurality of rod-like members or said plurality of tubular members constituting said reinforcing member extend to said second position.
The structure of the signpost according to claim 1 or 2, wherein the predetermined distance is 10 mm or more.
The reinforcing member is a plurality of rod-shaped members,
cross-sectional areas of the plurality of rod-shaped members in a plane perpendicular to the extension direction of the marker post are different;
The plurality of rod-shaped members are arranged in the hollow interior such that the cross-sectional areas of the rod-shaped members gradually increase from the tube center side toward the tube peripheral edge side of the marker post. 4. The structure of the signpost according to any one of 3.
The reinforcing member is a plurality of tubular members,
4. The structure of any one of claims 1 to 3, wherein said plurality of tubular members having different diameters are arranged substantially concentrically within said hollow interior in said first area.
a tubular member extending along the extension direction of the marker post is disposed in the hollow interior of the marker post;
6. A sign post structure according to any one of claims 1 to 5, wherein said reinforcing member is arranged between said tubular member and said sign post.
The structure of the marker post according to any one of claims 1 to 6, wherein the geometrical moment of inertia in the first range is larger than the geometrical moment of inertia in portions other than the first range.
A sign post having the structure of the sign post according to any one of claims 1 to 7.
a column member extending in a first direction;
a beam member coupled to the column member and extending in a second direction intersecting the first direction;
The beam member is a hollow tubular member having a constant outer diameter, an inner diameter of a predetermined inner diameter, and a wall thickness of a predetermined thickness,
the predetermined thickness is constant in a first range from a first position on the side surface of the column member to a second position separated by a predetermined distance in a direction in which the beam member extends from the side surface;
In the first range, a reinforcing member is arranged inside the hollow for reinforcing bending strength of the beam member,
the reinforcing member includes a plurality of rod-shaped members or a plurality of tubular members extending along the second direction;
One end of the plurality of rod-shaped members or the plurality of tubular members constituting the reinforcing member is in contact with the column member, and the other end is not fixed and is a free end,
The columnar structure, wherein the plurality of rod-like members or the plurality of tubular members are arranged within the hollow interior of the first area in a non-fixed and operable manner relative to each other.
10. The column structure according to claim 9, wherein said plurality of rod-like members or said plurality of tubular members constituting said reinforcing member extend to said second position.

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