JP3803628B2 - Prop for ground installation - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a support column for ground installation having a first opening at a lower portion of a column main body in which a column axis extends in the vertical direction, and a reinforcing member provided around the first opening.
[0002]
[Prior art]
Examples of such ground-installed support columns include road lighting, road signs, and flagpoles. This column has a column body with a cross section extending in the vertical direction of a circle or a square, and the lower part of this column body is provided with a first opening (inspection port) for inspection of operating equipment and inspection for repair. It is done. Since a large bending stress is generated in the column main body, a reinforcing member is provided around the first opening. For example, a tapered pole disclosed in Japanese Patent Application Laid-Open No. 2001-65201 is reinforced by welding an inspection door unit that functions as a reinforcing member around the opening. Here, FIG. 6 shows the structure of the ground-supporting column in the prior art. 6A is a cross-sectional view taken along a horizontal plane, FIG. 6B is a front view, and FIG. 6C is a side view.
[0003]
As for the support | pillar 1, the support | pillar main body 2 extended in the up-down direction of circular cross section is installed on the ground (a road, a sidewalk, etc.). A first opening 2 a as an inspection port is formed in the lower part of the column main body 2. A reinforcing member 3 is joined around the first opening 2a by welding. The reinforcing member 3 is formed with a second opening 3a corresponding to the first opening 2a. The shape of the 2nd opening part 3a is a rectangular shape along the up-down direction, and R shape is formed in the four corners. In addition, a reinforcing portion 3b is formed around the second opening 3a, and is formed in a square box shape when viewed from the front. The reinforcing member 3 is also formed in a quadrangular box shape when viewed in the pillar axial direction (cross-sectional shape in FIG. 6A). Bolt holes 3c for attaching the lid are provided above and below the second opening 3a. Further, a draining plate 3d is provided on the uppermost portion of the reinforcing member 3. As described above, the strength of the strut is compensated by welding and joining the reinforcing member 3 around the first opening 2a.
[0004]
[Patent Document 1]
JP 2001-65201 A [Problems to be solved by the invention]
However, although such a reinforcing member is provided, it is still insufficient. In particular, since the reinforcing member shown in FIG. 6 has a box shape as a whole, stress concentration is likely to occur, and the strength is still insufficient.
[0005]
This invention is made | formed in view of the said situation, The subject is providing the support | pillar for ground installation which can improve the problem of the stress concentration in a prior art, and can ensure intensity | strength.
[Means for Solving the Problems]
In order to solve the above problem, the ground installation support according to the present invention is:
A support column for ground installation having a first opening at a lower part of a support column body in which a support shaft extends in the vertical direction, and a reinforcing member provided around the first opening,
The reinforcing member is
A second opening corresponding to the first opening, and a reinforcing portion formed on the outer periphery of the second opening;
The second opening has an upper end and a lower end formed in an arc-shaped oval hole, and the reinforcing portion has an upper end and a lower end formed in an arc-shaped oval ,
The reinforcing member is formed in a shape that gradually protrudes from the outer surface of the column main body toward the inner side where the second opening is formed from the outer side which is the mounting portion .
[0006]
The ground installation support | pillar by this structure is provided with the reinforcement member, This reinforcement member has a 2nd opening part and the reinforcement part formed in the outer periphery. This 2nd opening part is an oval hole, and an upper end part and a lower end part are formed in circular arc shape. Further, the reinforcing portion formed on the outer periphery of the oval hole is also formed in an oval shape like the shape of the second opening, and the upper end portion and the lower end portion are formed in an arc shape. Note that the arc shape does not need to be a strict arc, and may be an elliptical arc or a curve close to an arc. As described above, the reinforcing member has a shape of the second opening and a surrounding reinforcing portion that are not square as in the prior art, and the upper and lower ends are formed in an arc shape, so that stress concentration hardly occurs. Sufficient strength can be secured. As a result, it is possible to provide a ground support column that can improve the problem of stress concentration in the prior art and ensure strength.
[0007]
As a preferred embodiment of the present invention, the reinforcing member may be formed in an arc shape when viewed in the column axial direction.
[0008]
This reinforcing member is formed in an arc shape not only in the shape of the periphery (front view) of the second opening but also in the pillar axial direction view (cross-sectional shape). Also in this respect, stress concentration can be further eliminated.
[0009]
As another preferred embodiment of the present invention, the reinforcing portion includes an inner reinforcing portion and an outer reinforcing portion, and the inner reinforcing portion is formed at a position recessed by a predetermined amount from the outer reinforcing portion. The thing which the cover member which can be opened and closed is attached to a part is mention | raise | lifted.
[0010]
The reinforcing part provided around the second opening has an inner reinforcing part and an outer reinforcing part. The inner reinforcing portion is recessed more than the outer reinforcing portion, and the lid member is attached here. The strength against bending can be increased by partially denting the reinforcing portion to create a step.
[0011]
As still another preferred embodiment of the present invention, a reinforcing rib that fits into the first opening is formed on the back side of the inner reinforcing portion or the outer reinforcing portion.
[0012]
By providing such reinforcing ribs, the strength can be further increased. Moreover, it can utilize also for the positioning at the time of fixing a reinforcement member to a support | pillar main body by setting it as the shape which can be fitted to a 1st opening part.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
A preferred embodiment of a ground support column (hereinafter simply referred to as a column) according to the present invention will be described with reference to the drawings. FIG. 1 shows a situation where the support column 1 is installed. The support 1 is used for installing road lighting, road signs, flagpoles, and the like. As shown in FIG. 1, when the road surface G1 and the sidewalk surface G2 are formed with a step, they are installed on the sidewalk surface G2, but of course, the present invention is not limited to this. It can be installed not only on sidewalks but also in various places such as streets, parks, and plazas.
[0014]
A first opening called an inspection port is provided at the lower part of the support column 1, and a reinforcing member 10 is provided around the first opening. The height H of the upper surface of the reinforcing member 10 from the ground surface is set to a height at which a person can operate, and is, for example, about 1 m10 cm. Hereinafter, a configuration example of the reinforcing member 10 will be described. The column main body and the reinforcing member constituting the column 1 are manufactured from a steel material.
[0015]
<First Embodiment>
FIG. 2 is a diagram illustrating a configuration of the reinforcing member 10 according to the first embodiment. (A) is sectional drawing (shape of a pillar axial direction view), (b) is a front view, (c) is a side view. A first opening 2 a is formed in the lower part of the column body 2. A second opening 100 is provided at a position corresponding to the first opening 2a. The second opening 100 is an oval hole extending in the vertical direction. The upper end portion 100a and the lower end portion 100b of the second opening 100 are formed in an arc (semicircular shape). An inner reinforcing portion 101 and an outer reinforcing portion 102 are formed on the outer periphery of the second opening 100. The inner reinforcement portion 101 is recessed from the outer reinforcement portion 102 by a predetermined amount. The upper and lower end portions of the inner reinforcing portion 101 and the outer reinforcing portion 102 are also formed in an arc shape. That is, the 2nd opening part 100 and each reinforcement part 101,102 are formed concentric. The upper and lower arc shapes are not necessarily exact arcs, but may be any shape close to an arc (for example, a quadratic curve such as an elliptic arc). Bolt holes 101 a and 101 b for attaching the lid are formed above and below the inner reinforcing portion 101. Although the lid member is not shown, it has a shape that fits into the recessed portion of the inner reinforcing portion 101.
[0016]
As can be seen from FIG. 2A, the cross-sectional shape of the column main body 2 is circular, and the reinforcing member 10 is also formed in an arc shape when viewed in the column axial direction along this circle. That is, the reinforcing member 10 is not only arc-shaped at the upper and lower ends when viewed from the front, but is also arc-shaped when viewed from the column axis direction. By adopting such a shape, stress concentration is eliminated and the strength of the entire support column is improved. Further, the reinforcing member 10 shown in FIG. 2 can be formed by press working. The recess of the inner reinforcing portion 101 can also be formed by press molding. Therefore, processing is easy. Further, the reinforcing member 10 is joined to the column main body 2 by welding.
[0017]
Moreover, since the upper end part of the reinforcement member 10 is formed in circular arc shape, it is hard to collect rainwater and the draining board as shown in FIG. 6 is unnecessary. Further, the reinforcing member having the shape shown in FIG. 2 has an advantage that it does not become an obstacle for a pedestrian or the like because the protruding amount from the support body 2 is small.
[0018]
Second Embodiment
FIG. 3 is a view showing the support 1 according to the second embodiment. In this example, the cross-sectional shape of the column main body 2 is a square. Similar to the first embodiment, the second opening 110 and the inner reinforcing portion 111 and the outer reinforcing portion 112 formed around the second opening 110 are oval, and the upper and lower ends thereof are formed in an arc shape. Moreover, it is formed in the circular arc shape also in the column axial view. The reinforcing member 11 is joined to the column main body 2 by welding.
[0019]
FIG. 4 is a view showing the support 1 according to the third embodiment. In this example, the cross-sectional shape of the column main body 2 is a regular octagon. Similar to the first embodiment, the second opening 120 and the inner reinforcing portion 121 and the outer reinforcing portion 122 formed around the second opening 120 are oval, and the upper and lower ends thereof are formed in an arc shape. Moreover, it is formed in the circular arc shape also in the column axial view. The reinforcing member 12 is joined to the column main body 2 by welding.
[0020]
FIG. 5 is a view showing a support according to the fourth embodiment. In this example, the column main body 2 has a circular cross-sectional shape. Similar to the first embodiment, the second opening 130 and the inner reinforcing portion 131 and the outer reinforcing portion 132 formed around the second opening 130 are oval, and the upper and lower ends thereof are formed in an arc shape. Moreover, it is formed in the circular arc shape also in the column axial view. Further, a reinforcing rib 133 is integrally formed on the back side of the reinforcing member 13. This reinforcing rib 133 is also a rib protruding in an oval shape so as to be just fitted into the first opening 2 a of the column main body 2. By providing the reinforcing rib 133, the strength of the support column 1 can be further increased. The reinforcing member 13 is joined to the column main body 2 by welding. The reinforcing member 13 can be manufactured by casting or forging.
[0021]
<Another embodiment>
The material of the column main body and the reinforcing member is not limited to a specific material. The same applies to the manufacturing method of the column main body and the reinforcing member. Various cross-sectional shapes of the support columns are also conceivable. For example, an irregular cross section may be used.
[Brief description of the drawings]
FIG. 1 is a diagram showing a situation in which a ground support column is installed. FIG. 2 is a diagram illustrating a configuration of a column according to a first embodiment. FIG. 3 is a diagram illustrating a configuration of a column according to a second embodiment. 4] A diagram showing a configuration of a support column according to the third embodiment. [FIG. 5] A diagram showing a configuration of a support column according to the fourth embodiment. [FIG. Explanation】
DESCRIPTION OF SYMBOLS 1 Ground installation support | pillar 2 Support | pillar main body 2a 1st opening part 10,11,12,13 Reinforcement member 100,110 2nd opening part 120,130 2nd opening part 101,111 Inner reinforcement part 121,131 Inner reinforcement part 102, 112 Outer reinforcement part 122,132 Outer reinforcement part

Claims (4)

A support column for ground installation having a first opening at a lower part of a support column body in which a support shaft extends in the vertical direction, and a reinforcing member provided around the first opening,
The reinforcing member is
A second opening corresponding to the first opening, and a reinforcing portion formed on the outer periphery of the second opening;
The second opening has an upper end and a lower end formed in an arc-shaped oval hole, and the reinforcing portion has an upper end and a lower end formed in an arc-shaped oval ,
The reinforcing member is formed in a shape that gradually protrudes from the outer surface of the supporting column main body toward the inner side where the second opening is formed from the outer side which is a mounting portion thereof. .   The ground reinforcing column according to claim 1, wherein the reinforcing member is formed in an arc shape when viewed in the column axial direction.   The reinforcing part has an inner reinforcing part and an outer reinforcing part, and the inner reinforcing part is formed at a position recessed from the outer reinforcing part by a predetermined amount, and a lid member that can be opened and closed is attached to the inner reinforcing part. The support | pillar for ground installation of Claim 1 or 2 characterized by these.   The ground support column according to claim 3, wherein a reinforcing rib that fits into the first opening is formed on a back side of the inner reinforcing portion or the outer reinforcing portion.

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