JP2022150277A - Fixing member - Google Patents

Abstract

To provide a fixing member with a new structure that makes it easy to inspect bolts, etc., for fixing the fixing member.SOLUTION: A fixing member 14 includes a joining part 16 to which a lower end of a column 10 supporting a structure is joined and a base part 20 placed on a base 18. The base part 20 extends radially outward from the joining part 16, and has a flange part 20a in which a through hole 24 through which a bolt 22 protruding from the base 18 passes is formed. In the base part 20, a space S is formed between a part of the lower surface of the flange part 20a and the base 18. The space S is connected from an outer edge 20c of the base part 20 to the lower part of the through hole 24.SELECTED DRAWING: Figure 1

Description

The present invention relates to a fixing member for fixing a column to a foundation.

2. Description of the Related Art Conventionally, posts used for outdoor lights, road signs, etc. have a base plate joined to the lower end for fixing them to the ground. The base plate is provided with through-holes through which anchor bolts protruding from the concrete foundation buried in the ground pass. By tightening nuts on the anchor bolts that pass through the through-holes, the base plate is firmly attached to the concrete foundation. It is fixed (see Patent Document 1).

JP 2009-275396 A

However, when the aforementioned base plate is fixed to the concrete foundation, the state of the portions of the anchor bolts protruding from the concrete cannot be confirmed from the outside. Therefore, even if the strength of the anchor bolt is lowered, it is difficult to immediately grasp the situation.

The present invention has been made in view of these circumstances, and one of its exemplary purposes is to provide a fixing member having a new structure that facilitates inspection of bolts and the like for fixing the fixing member.

In order to solve the above problems, a fixing member according to one aspect of the present invention includes a joint portion to which a lower end of a support column that supports a structure is joined, and a base portion that is placed on a foundation. The base portion protrudes radially outward from the joint portion and has a flange portion formed with a through hole through which a bolt protruding from the foundation passes. The base has a space formed between a part of the lower surface of the flange and the foundation, and the space extends from the outer edge of the flange to the bottom of the through hole.

According to this aspect, in a state where the fixing member is fixed to the foundation via the bolt passing through the through-hole, part of the bolt projecting from the foundation below the flange portion of the fixing member can be inspected from the outside.

The space may have a height in the range of 3 to 50 [mm]. As a result, the condition of the bolts can be inspected with an inspection tool such as a fiberscope or by visual inspection without increasing the space.

A flared reinforcing portion having a smooth surface from the joint portion toward the through hole may be further provided. The reinforcing portion may have a thick portion surrounding the through hole. Thereby, it is possible to increase the strength of the flange part in a state of being lifted from the foundation by the space.

The thick portion may be provided in an arc shape around the through hole. This makes it difficult for water to accumulate around the through hole.

The base portion may have a first lower surface that contacts the foundation and a second lower surface that is radially outward of the first lower surface and is spaced from the foundation. When the height of the space is H [mm], the first lower surface and the second lower surface may be connected by a curved surface having a radius of curvature r [mm] (H−3<R≦H). As a result, when a load is applied to a portion of the flange portion having the second lower surface in which a space is formed between the foundation and the base, stress concentration at the boundary between the first lower surface and the second lower surface can be mitigated.

In the base portion, the area of the first lower surface in contact with the foundation may be three times or more the area of the second lower surface with a space formed between it and the foundation. As a result, it is possible to perform inspection using the space between the second lower surface and the foundation while ensuring the strength of the first lower surface portion of the base portion.

The securing member may be a one-piece piece of cast iron. This makes it possible to easily manufacture a member having a complicated shape or a partially different thickness.

It should be noted that any combination of the above-described components, and conversion of the expressions of the present invention between methods, devices, systems, etc. are also effective as aspects of the present invention.

According to the present invention, it becomes easier to inspect the bolts and the like that fix the fixing member.

FIG. 4 is a schematic diagram showing a main part of a column including a fixing member according to the embodiment; FIG. 3 is a perspective view of a fixing member according to the embodiment; FIG. 3 is a top view of the fixing member shown in FIG. 2 as seen from direction D1; It is the bottom view which looked at the fixing member shown in FIG. 2 from D2 direction. FIG. 4 is a cross-sectional view of the fixing member shown in FIG. 3 taken along the line AA; FIG. 4 is a BB cross-sectional view of the fixing member shown in FIG. 3; Figure 4 is an enlarged view of the area of the securing member shown in Figure 3;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described based on embodiments with reference to the drawings. The same or equivalent constituent elements, members, and processes shown in each drawing are denoted by the same reference numerals, and duplication of description will be omitted as appropriate. Moreover, the embodiments are illustrative rather than limiting the invention, and not all features and combinations thereof described in the embodiments are necessarily essential to the invention.

(pillar)
The struts according to the present embodiment are for supporting structures, for example, structures used in the road traffic field such as guide signs, regulatory signs, signals, information boards, cameras, antennas, communications, etc. It is used for arranging structures used in the field of information communication and structures used in the field of lighting such as roadway lighting and sidewalk lighting at high places. In addition, the column has a column base portion formed with a through hole through which an anchor bolt protruding from the foundation passes, and in the present embodiment, a fixing member, which will be described later, corresponds to the column base portion.

FIG. 1 is a schematic diagram showing a main part of a column including a fixing member according to this embodiment. A column 10 according to the present embodiment includes a column body 12 and a fixing member 14 . The column body 12 is, for example, a steel pipe having a diameter of 100 to 500 mm and a length (height) of 1000 to 10000 mm. The fixing member 14 is a member using ductile cast iron which is excellent in corrosion resistance. The fixing member 14 and the column main body 12 are firmly joined to each other by friction welding. The fixing member 14 also includes a joint portion 16 to which the lower end 12a of the support column 10 that supports the structure is joined, and a base portion 20 that is placed on a foundation 18 such as concrete.

FIG. 2 is a perspective view of a fixing member according to this embodiment. FIG. 3 is a top view of the fixing member shown in FIG. 2 as seen from direction D1. FIG. 4 is a bottom view of the fixing member shown in FIG. 2 as seen from the D2 direction. FIG. 5 is a cross-sectional view of the fixing member shown in FIG. 3 taken along the line AA. 6 is a BB cross-sectional view of the fixing member shown in FIG. 7 is an enlarged view of the region R of the fixing member shown in FIG. 3. FIG.

A base portion 20 of the fixing member 14 protrudes radially outward from the tubular joint portion 16, and is a flange formed with four through holes 24 through which bolts 22 (see FIG. 1) projecting from the base 18 pass. It has a portion 20a. By aligning the positions of the bolts 22 and the through-holes 24, installing the fixing members 14 on the foundation 18, and fastening the nuts 23 to the bolts 22, the columns 10 are fixed to the foundation 18 via the fixing members 14. . The base portion 20 has a space S formed between a portion of the lower surface of the flange portion 20 a and the foundation 18 , and the space S extends from the outer edge 20 c of the flange portion 20 a to the bottom of the through hole 24 .

As a result, while the fixing member 14 is fixed to the base 18 via the bolt 22 passing through the through hole 24, the portion 22a of the bolt 22 protruding from the base 18 below the flange portion 20a of the fixing member 14 is removed. The neighborhood can be inspected from the outside.

The space S according to this embodiment has a height H in the range of 3 to 50 [mm]. The height H may be 5 mm or more, and the height H may be 25 mm or less. As a result, the state of the bolt 22 can be inspected with an inspection instrument such as a fiberscope without making the space S so large.

Further, the fixed member 14 is provided at four locations with flare-shaped reinforcing portions 26 each having a smooth and continuous surface (without steps) from the joint portion 16 toward each through hole 24 . As a result, even when an external force is applied to each portion of the fixing member 14 , stress concentration is less likely to occur in the reinforcing portion 26 . The reinforcing portion 26 has a height of about 100 to 200 mm from the surface of the flange portion 20a and a width W (see FIG. 3) of about 100 to 150 mm. Further, the reinforcing portion 26 has a thick portion 26 a formed to surround the through hole 24 . A portion of the thick portion 26a extends to a region R1 of the flange portion 20a where the space S is formed below. Thereby, the space S can increase the strength of the flange portion 20a that is raised from the foundation 18 .

Moreover, the thick portion 26 a is provided in an arc shape around the through hole 24 . When reduced, the thick portion 26 a is provided so as not to completely surround the through hole 24 . As a result, even if water cannot escape from the through-hole 24 with the bolt 22 inserted into the through-hole 24, the water will escape from the portion 26b around the through-hole 24 where there is no thick portion 26a. Water is less likely to accumulate around the hole 24, and deterioration of the bolt 22 and the nut 23 can be reduced.

Further, as shown in FIGS. 3 and 7, the arc-shaped thick portion 26a is located outside a straight line L2 orthogonal to the straight line L1 connecting the center O1 of the cylindrical joint portion 16 and the center O2 of the through hole 24. extends to The angle α formed by the tip 26c of the arc-shaped thick portion 26a, the center O2 of the through hole 24, and the center O1 of the joint portion 16 is larger than 90°, preferably 100° or more. Also, the angle α formed is less than 180°, preferably 135° or less, so that water does not accumulate around the through hole 24 as described above. Accordingly, since the thick portion 26 a is provided so as to surround the bolt 22 and the nut 23 , the bolt 22 and the nut 23 protruding from the through hole 24 are less likely to come into direct contact with pedestrians, bicycles, and the like.

In addition, the base portion 20 has a first lower surface 20b in contact with the foundation 18 and a second lower surface 20d radially outside the first lower surface 20b and having a space S between the base 18 and the foundation 18. ,have. When the height of the space is H [mm], the first lower surface 20b and the second lower surface 20d are connected by a curved surface 20g with a radius of curvature r [mm] (H−3<r≦H). That is, when the height H of the space S is 12 mm, the curvature radius r is preferably more than 9 mm and 12 mm or less. As a result, when a load is applied to a portion of the flange portion 20a having the second lower surface 20d in which the space S is formed between the foundation 18 and the base 18, the first lower surface 20b and the second lower surface 20d can relieve the stress concentration at the boundary of

Further, in the base portion 20 according to the present embodiment, the thickness t of the flange portion 20a at the portion where the second lower surface 20d is formed is about 0.8 to 1.5 times the height H of the space S. is.

Further, as shown in FIG. 2, the flat portion 20e between the reinforcing portions 26 of the flange portion 20a has a first lower surface 20b in contact with the base 18 and a side surface 20f continuous with the first lower surface 20b. have. The side surface 20f is an arc-shaped curved surface that is recessed toward the center O1 of the joint portion 16, and has a curvature radius of 200 to 300 mm.

Further, in the fixing member 14 according to the present embodiment, since the area S1 is equal to or larger than a certain value, the post 10 can be firmly fixed to the ground surface. The area S2 of the second lower surface 20d where S is formed becomes relatively narrow, and inspection of the bolt 22 through the space S becomes difficult. Therefore, in the base portion 20, the area S1 of the first lower surface 20b in contact with the foundation 18 is three to six times the area S2 of the second lower surface 20d in which the space S is formed between the base 18 and the foundation 18. Good to have. The area S1 ranges, for example, from 14,500 to 29,000 mm ² , and the area S2 ranges, for example, from 4,400 to 7,600 mm ² . As a result, inspection using the space S between the second lower surface 20d and the foundation 18 can be performed while ensuring the strength of the portion of the first lower surface 20b of the base portion 20 .

In addition, since the fixing member 14 according to the present embodiment is a one-piece component made of cast iron, it can be easily manufactured with high accuracy even if it has a complicated shape with a gently curved surface or a shape with a partially different thickness. . In addition, if the space S is composed of a fixed member with a divided structure (multiple parts), sufficient strength may not be ensured. Further, in the fixing member having a split structure, the gaps between the parts may promote corrosion deterioration, but the corrosion deterioration can be suppressed by forming the fixing member in an integral structure.

Although the present invention has been described with reference to the above-described embodiments, the present invention is not limited to the above-described embodiments, and can be applied to any suitable combination or replacement of the configurations of the embodiments. It is included in the present invention. Further, it is also possible to appropriately rearrange the combinations and the order of processing in the embodiments based on the knowledge of a person skilled in the art, and to add modifications such as various design changes to the embodiments. Embodiments described may also fall within the scope of the present invention.

10 Post 12 Post main body 12a Lower end 14 Fixing member 16 Joint 18 Base 20 Base 20a Flange 20b First lower surface 20c Outer edge 20d Second lower surface 20e Flat portion 20f Side , 22 bolt, 23 nut, 24 through hole, 26 reinforcing portion, 26a thick portion, 26b portion, 26c tip, H height, L1 straight line, L2 straight line, O1 center, O2 center, R area, R1 area, S space , S1 area, S2 area, W width, r radius of curvature, t thickness.

Claims (7)

a joint to which the lower end of the column supporting the structure is joined;
a base resting against the foundation;
The base portion protrudes radially outward from the joint portion, and has a flange portion formed with a through hole through which a bolt protruding from the foundation passes,
The base portion has a space formed between a portion of the lower surface of the flange portion and the foundation,
The fixing member, wherein the space extends from an outer edge of the flange portion to a lower portion of the through hole. 2. The fixing member according to claim 1, wherein the space has a height in the range of 3 to 50 [mm]. further comprising a flared reinforcing portion having a smooth surface from the joint toward the through hole;
3. The fixing member according to claim 1, wherein the reinforcing portion has a thick portion surrounding the through hole. 4. The fixing member according to claim 3, wherein the thick portion is provided in an arc shape around the through hole. The base portion has a first lower surface in contact with the foundation, and a second lower surface radially outside the first lower surface and forming the space between the base and the foundation. ,
When the height of the space is H [mm], the first lower surface and the second lower surface are connected by a curved surface having a radius of curvature r [mm] (H−3<R≦H). The fixing member according to any one of claims 1 to 4. 2. The base portion is characterized in that the area of the first lower surface in contact with the foundation is three times or more the area of the second lower surface in which the space is formed between the base and the foundation. 5. The fixing member according to any one of items 1 to 4. 7. A fixing member according to any one of the preceding claims, characterized in that it is a single piece made of cast iron.

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