JP2650586B2 - Reinforcement structure of cylindrical structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing structure for a columnar structure such as a lighting pole having a working opening or a wire drop-in column.

[0002]

2. Description of the Related Art As shown in FIG. 4, a conventional columnar structure reinforcement structure includes a columnar structure A, a reinforcement frame B, and a reinforcement cover.
C. The columnar structure A is made of metal, such as a lighting pole or a wire drop-in column, which is cylindrically erected on the ground. Usually, these cylindrical structures A
Has an opening Aa for work so that work such as storage and inspection of equipment or connection of wiring can be performed. Providing such an opening Aa means that the columnar structure A
This means that the cross-sectional performance near the opening Aa is deteriorated. Normally, the columnar structure A is subjected to various bending loads such as the weight of the device attached to the tip, wind pressure, and tension of the overhead wire between the columnar structure and other columnar structures. Becomes Therefore, it is necessary to compensate for the degraded cross-sectional performance by the reinforcing member.

A reinforcing frame B and a reinforcing cover C correspond to the above-mentioned reinforcing member. The reinforcing frame B is a metal frame, and is welded to the periphery of the opening Aa of the columnar structure A. The reinforcing frame B has a cylindrical structure on the side in contact with the cylindrical structure A.
It is curved according to the outer shape of A. In addition, reinforcement frame B
Has a female screw portion Ba for attaching the reinforcing cover C 2. The reinforcing cover C is a flat plate that reinforces the columnar structure A and closes the opening Aa of the columnar structure A. The reinforcing cover C has a size that overlaps with a plane outline of the reinforcing frame B. The reinforcing cover C has an insertion hole through which the screw is inserted.
It has Ca and is screwed to the reinforcing frame B by screws.

In this columnar structure A, a reinforcing frame B is welded at the time of its manufacture. Regarding the reinforcing cover C, the opening Aa of the columnar structure A must be opened during the above-mentioned operation. It is removable so that it can be done.

[0005]

However, in the above-mentioned reinforcing structure, since the welding method of the reinforcing frame is full circumference welding, distortion or the like is generated at the periphery of the opening of the cylindrical structure due to heat at the time of welding, so that the cylindrical shape is deformed. The strength of the entire structure is affected.
Therefore, it is necessary to perform welding while correcting it, and the welding operation is a very careful and time-consuming operation. In addition, since the reinforcing frame projects outward from the periphery of the opening of the columnar structure and is welded, the reinforcing frame may obstruct the passage or impair the aesthetic appearance.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has as its object to reduce the amount of protrusion from a columnar structure to the outside and to facilitate welding of a reinforcing member. The object of the present invention is to provide a reinforcing structure.

[0007]

In order to achieve the above object, a reinforcing structure for a columnar structure according to the present invention comprises: a columnar structure having an opening for work and a mounting portion for a reinforcing member; C
A reinforcing plate that reinforces the cylindrical structure, which is a metal plate that is elastically deformable in the shape of a letter, and a reinforcing cover that closes the opening of the cylindrical structure. It is arranged along the inner periphery of the columnar structure so as to slightly protrude inward of the portion, and the reinforcing cover is attached to the mounting portion of the columnar structure from the outside.

[0008]

According to the first aspect of the present invention, since the reinforcing plate is disposed inside the columnar structure, the amount of outward projection is reduced by that much.

According to the second aspect of the present invention, since the reinforcing plate performs fillet welding at a portion slightly protruding inward of the opening of the columnar structure, only partial welding is required, and deformation occurring at the time of welding is also small. It can be suppressed to the extent that it does not become.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. The reinforcing structure for a columnar structure of the present invention includes a columnar structure 1, a reinforcing plate 4, and a reinforcing cover 6.
The columnar structure 1 is like a lighting pole, a wire drop-in column, or the like as in the conventional example, and has an opening 2 for work.
Further, the columnar structure 1 has a reinforcing cover 6 around the opening 2.
And a female screw portion 3 which is a mounting portion for mounting the same.

The reinforcing plate 4 is an elastically deformable metal plate having a substantially C-shaped cross section, for example, an iron plate having a thickness of about 5 mm, and a slit 5 for welding is provided at the center. When the reinforcing plate 4 is disposed inside the cylindrical structure 1, the slit 5 is located opposite the opening 2 of the cylindrical structure 1, so that the slit 5 is welded from the outside of the opening 2. Can be fixed. The length between both ends in the circumferential direction of the reinforcing plate is slightly longer than the inner circumferential length of the columnar structure excluding the circumferential length of the opening.

The arrangement of the reinforcing plate 4 is performed as follows. First,
The reinforcing plate 4 is elastically shrunk between both ends in the circumferential direction by a connecting member (not shown), and has a smaller cross-sectional outline, and is inserted from the pipe end of the columnar structure 1. When the connecting member is cut at a position where both ends in the circumferential direction of the reinforcing plate 4 protrude inward of the opening 2 of the cylindrical structure 1, the reinforcing plate 4 elastically expands and the inner circumferential surface of the cylindrical structure 1 is expanded. Adhere to the surface. The reinforcing plate 4 has two ends protruding inward from the opening 2 of the cylindrical structure 1.
Since the fillet welding is performed, deformation caused by welding can be suppressed within an allowable range. In addition, the portion of the slit 5 located opposite the opening 2 of the columnar structure 1 is also welded, so that the columnar structure 1 is firmly reinforced.

The reinforcing cover 6 is provided at the opening 2 of the cylindrical structure 1.
Is a metal plate having a size that covers the outer periphery of the cylindrical structure 1 and having a curved shape along the outer periphery of the cylindrical structure 1.
And reinforce the columnar structure 1. The reinforcing cover 6
It has an insertion hole 7 near the periphery where a screw is inserted, and is screwed to the columnar structure 1 by the screw. This reinforcement cover 6
Can be removed.

By the way, a columnar structure such as a lighting pole or an electric wire lead-in column is erected on the ground with a reinforcing plate, and has a lower end buried in the ground having an insertion opening for inserting a conduit or the like.
For example, the electric wire drop-in column draws in an electric wire that is overhead from a power distribution pole from its upper end, and inserts a conduit extending underground from each home or the like into an insertion port to draw the electric wire inside. By connecting them at the opening, electricity is supplied. In that case, the connection work is performed by loosening the screws holding the reinforcing cover to the electric wire lead-in column and removing the reinforcing cover. After the work is completed, the reinforcing cover is screwed again with screws. The same applies to the case where a ballast or a switch is housed inside the lighting pole or the equipment is inspected. Further, since the reinforcing plate is disposed inside the columnar structure, it does not have to protrude outward by that amount, and does not hinder traffic even when the columnar structure is erected on the side of a road.

The position of the slit of the reinforcing plate need not be at the center of the reinforcing plate as long as it can be welded from the opening side, and the slit may be, for example, a round hole. Further, the slit may be omitted if the reinforcing plate is firmly welded and fixed to the columnar structure. Furthermore, the attachment of the reinforcing cover to the columnar structure is not limited to screwing with screws, but may be, for example, locking or fitting by providing a locking piece or fitting piece on the reinforcing cover. In this case, the attachment portion of the columnar structure may be a corresponding locking portion or fitting portion, and may be appropriately changed depending on how the cover is attached to the columnar structure.

[0016]

According to the reinforcing structure for a cylindrical structure according to the first aspect, since the reinforcing plate is disposed inside the cylindrical structure, the amount of protrusion outward from the cylindrical structure is reduced.

The reinforcing structure for a columnar structure according to claim 2 is
By welding the part where the reinforcing plate slightly protrudes inside the opening of the cylindrical structure, only partial welding is required, and deformation that occurs during welding is suppressed to the extent that it does not matter, so welding is easy I can do it.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing one embodiment of the present invention.

FIG. 2 is a front view showing a state where the reinforcing plate is welded.

FIG. 3 is a front view showing a state where the reinforcing cover is attached.

FIG. 4 is an exploded perspective view showing a conventional example.

[Explanation of symbols]

 1 Cylindrical structure 2 Opening 3 Female screw (mounting part) 4 Reinforcement plate 6 Reinforcement cover

Claims (2)

(57) [Claims] 1. A columnar structure provided with an opening for work and a mounting portion for a reinforcing member, a reinforcing plate which is a metal plate having a substantially C-shaped cross section and which can be elastically deformed, and reinforcing the columnar structure. It consists of a reinforcing cover that closes the opening of the columnar structure, and the reinforcing plate is arranged along the inner periphery of the columnar structure so as to secure an opening area where the opening of the columnar structure can work, A reinforcing structure for a cylindrical structure in which a reinforcing cover is attached to a mounting portion of the cylindrical structure from outside. 2. The reinforcing structure for a columnar structure according to claim 1, wherein the reinforcing plate is disposed so that both ends in the circumferential direction slightly protrude into an opening of the columnar structure.