JP3470600B2 - Fixed installation structure of aluminum alloy column - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is to install electric poles, street lights, poles for flags and signs, etc. for erection of overhead lines of railways and electric wires for transmission and distribution on a support surface such as the ground. Regarding technology.

[0002]

2. Description of the Related Art Conventionally, wooden and concrete poles have been used for railway overhead lines and power transmission and distribution poles, and in recent years galvanized steel pipes have also been used. These wooden materials have been replaced with concrete because they are difficult to obtain as homogeneous materials and easily corrode and thus have a short service life.However, concrete materials have excellent durability and are easy to maintain. However, since the weight is heavy, it is difficult to newly install or replace it, and it is difficult to separate the reinforcing steel material when it is discarded, so that the cost of recycling is high. In addition, galvanized steel pipes are also excellent in strength, but they are heavy in weight and have problems such as weather resistance. Recently, aluminum alloys have been used as the material for these columns from the viewpoint of workability improvement and ease of maintenance due to weight reduction. Is expected. Since the aluminum alloy column can be made lighter in weight and the aluminum alloy can be easily collected and recycled, it is possible to easily deal with a problem of waste disposal and a request for environmental protection.

[0003] These advantages are the same as for street lights, poles and signs, and they are becoming popular with the devising of structures suitable for aluminum alloys and the development of processing techniques.
So-called utility pole foundations, where these utility poles and stanchions are fixed and installed on the ground, are also carried out by building utility poles etc. into the foundation holes dug up on the ground and then backfilling concrete or quarry etc. into the foundation holes. However, recently, in order to meet the demand for high accuracy such as installation height and position such as utility poles for overhead contact lines, and to easily perform utility pole replacement work, anchor bolts, etc., have been previously attached to the support surface of the ground or structures. It has been practiced to set up a foundation with embedded electric poles, and to install electric poles on this foundation and fix them with anchor bolts.

The foundation and fixing structure are shown in FIG. Reference numeral 20 is an electric pole for an overhead line of a train, which is installed and fixed on the ground, and is integrally constructed by being joined to the bending portion 23 and the beam portion 25 by the joint flanges 21 and 22, and the bracket 26 supports the overhead line. The basic structure of the electric pole consists of a foundation 31 in which an anchor bolt 30 is embedded on the ground. The utility pole fixture 10 includes a reinforcing band 11 into which the utility pole 20 is inserted and fitted, a lower end plate 12 welded to a lower end of the reinforcing band, and a reinforcing plate 13 welded to a side surface and a lower end plate of the reinforcing band to bear lateral bending strength. Consists of. The fixture 10 is fitted and fixed to the electric pole in advance, or is fixed to the foundation with an anchor bolt to insert and fit the rear electric pole to fix the electric pole. The utility pole and the fixture are joined together by welding 50 at the upper edge of the reinforcing band of the fixture in order to prevent the utility pole from rotating and receive a load such as bending applied to the fixture from the utility pole.

[0005] These fixed structures for supporting poles such as electric poles are generally used in steel products such as zinc steel pipes.
When these struts are made of aluminum alloy, if the struts and fixtures are welded and joined as described above, not only the welds but also the heat input of the welding will significantly increase the strength of the heat-affected zone around them. Will fall. In the case of an aluminum alloy, mechanical properties such as its strength are exhibited by heat treatment, so that the so-called annealing causes a marked decrease in strength. The heat effect due to such welding is unacceptable because it cannot be maintained and cannot be put to practical use. As a connecting and fixing means that does not suffer such metallurgical influence, it is possible to connect between the utility pole and the reinforcing band of the fixture by mechanical means such as bolts and nuts, but it is originally large. Since it is a place to receive the load, the fixing structure for withstanding the load becomes complicated and the cost is increased.

[0006]

SUMMARY OF THE INVENTION The present invention has been devised in order to solve such a problem, in which a pole such as an electric pole made of an aluminum alloy is mounted on a ground or a foundation previously constructed on a structure. In the fixed structure for installing and fixing,
Even if the strength of the aluminum alloy material is reduced by welding between the fixture and the support, the fixing force will not be hindered, and a simple and inexpensive structure can be used to firmly and reliably join. To aim.

[0007]

In order to achieve the object, the present invention provides an aluminum alloy fixture for fixing an aluminum alloy column to a foundation, the fixture comprising a lower end plate and a cylindrical reinforcing band. Then, the reinforcing band is made into two or more split types which are divided in the axial direction, and the lower ends of the support columns are welded along the dividing edges of these divided reinforcing bands to be integrally connected to each other, and the integrated support column lower ends. Is an aluminum alloy column fixing structure in which the lower end plate is brought into contact with and fixed to the lower end plate, and further, an aluminum alloy reinforcing plate is welded to the reinforcing band and the lower end plate at two sides respectively.

Further, in an aluminum alloy fixture for fixing an aluminum alloy column to a foundation, the fixture is composed of a lower end plate, two or more reinforcing plates and a tubular reinforcing band, and the reinforcing band is arranged in the axial direction. It is divided into two or more split types, and a reinforcement plate is welded to the lower end of the column along its axial direction on one side, and a reinforcement band is welded to the reinforcement plate along its divided edge to be integrally joined,
This is an aluminum alloy strut fixing structure in which the integrated lower end of the strut is brought into contact with and fixed to the lower end plate.

[0009]

[Operation] When the support column is fixed to the anchor bolts on the foundation by the fixing tool, as in the case of the support column made of zinc-plated steel pipe, the support column and the reinforcement band of the tubular reinforcement band in which the support column is inserted and fitted are inserted. When welding is performed along the upper edge, the welded portion and the strength-reduced portion due to heat input thereof make one round at the upper end portion of the reinforcing band of both the column and the reinforcing band. Therefore, the strength-reduced portion due to these heat influences extends along the entire circumference along the cross section of the portion. Therefore, if a bending load from wind pressure or an overhead wire is applied to the stanchions, both the struts and the fixture will receive the load in its cross section, so depending on the strength of these annealed materials, the bending load applied to these struts may be different. I can't stand it.

On the other hand, in the structure according to the first aspect of the present invention, the connecting structure of the support column and the reinforcing band is welded in the axial direction thereof, and therefore, there is only one welding point in the tubular cross section. Limited to the department. Therefore, the strength-reduced portion is only at those welding points, and the load applied to the column such as bending and twisting is borne by the cross section having a healthy structure that is not affected by these welding, which accounts for most of the other, Sufficient strength can be maintained against these loads applied to the columns. On the other hand, the joint strength between the support column and these reinforcing bands can be maintained at a predetermined strength because the joint portion by welding these is provided along the axial direction over a sufficient length. Further, in the structure according to claim 2, the cylindrical reinforcing band and the lower end plate are connected and integrated with each other by the reinforcing plate so that the bending and torsional loads applied to the fixture are borne and the strength of the fixing structure is increased. It will improve.

According to the third aspect of the present invention, the column is directly welded to the reinforcing plate in the axial direction. Similarly, the strength-reduced portion due to the welding is provided only at the welding points of those cross sections, and other welding is performed. The desired strength is ensured by most of the cross-sections that are not affected by heat, and the joint strength between the support column and the reinforcing plate is maintained by the welding length in the axial direction. Are integrally connected to each other to retain their circumferential strength.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific embodiments of the present invention will be described below with reference to the drawings. In FIG. 2, (a) is an anchor bolt 30 in which an aluminum alloy column 20 to which the fixture 10 of the present invention is integrally connected is embedded in a ground foundation 31.
4B is a sectional view taken along the line AA of FIG. The tubular reinforcing band 11 is made of an aluminum alloy, and in the example shown in the figure, it is composed of two split molds. The lower end of the column is sandwiched between these split molds, and the axial end edges of the column and the column. And 50 are welded and joined. The support and the lower end of the reinforcing band and the lower end plate which are welded and integrally connected are fixed by welding or the like to be integrated. Further, in the case of a pillar having a large load such as an electric pole, the reinforcing plate 13 is welded 51 along the axial direction of the reinforcing band,
Further, the reinforcing plate and the lower end plate are welded 52 and integrally formed, so that a large bending load related to the column can be received. Reference numeral 55 denotes a waterproof caulking portion formed between the column and the reinforcing band.

As shown in the figure, since the column 20 is welded 50 to the reinforcing band 11 along its axial direction, only a part of the cross section becomes a welding point, and the other part is affected by welding heat input. Absent. For this reason, most of the area along the cross section remains a healthy structure unaffected by welding.
The original strength of the aluminum alloy material is maintained, and the designed strength does not decrease. In addition, the bending load applied to the column between the column and the reinforcing band is reinforced by the cylindrical reinforcing band over its entire length, and a sufficient welding length is provided in the axial direction for the load in the rotational direction such as twisting. Therefore, the required strength can be secured.

FIG. 3 is a perspective view of the strut fixing structure of the present invention of FIG. 2, in which one side of the aluminum alloy reinforcing plate 13 is welded 51 to the reinforcing band 11 along the axial direction thereof.
Then, another side adjacent to this is welded 52 to the lower end plate 12 to be fixed to be integrated. Also, 53
Is a welded portion between the lower end of the reinforcing band 11 and the lower end plate. In the actual installation work of the support columns, the work efficiency can be improved by shipping from the factory in this state and fixing it to the foundation installed in advance on the site with anchor bolts.

4 (a), (b) and (c), the reinforcing plate 13 is welded to the lower end portion of the column 20 along the axial direction thereof.
Then, an embodiment of a fixing structure in which a split type reinforcement band 11 is welded 51 to this reinforcement plate along its division edge to be joined is shown. 4 (a) is a front view showing a partial cross section, and FIG.
4B is a sectional view taken along the line BB in FIG. 4, and FIG.
It is the elements on larger scale shown to C of (a). In the figure, two of the four reinforcing plates are directly welded to the column and the other two
Although one reinforcing plate is welded to the outer periphery of the split type reinforcing band 11, if necessary, the reinforcing band may be made into four divided types and all the reinforcing plates may be welded to the support columns. In this example, after the reinforcement plate was welded to the support pillar, the split-type reinforcement band was welded to the reinforcement plate.However, the split-type reinforcement band and the reinforcement plate were formed with appropriate grooves for the support pillar. Alternatively, these may be set together and welded together.

In this way, the support column, the reinforcing plate and the reinforcing band are integrally joined, and the reinforcing plate and the reinforcing band are brought into contact with the lower end plate and fixed by welding 52, 53 or the like to be integrated. FIG. 7C is an enlarged view showing the caulking portion 55 at the upper edge portion of the reinforcing band, and a caulking material such as resin is filled between the support column and the reinforcing band to prevent rainwater and the like from entering. The strut fixing structure of the present invention configured as described above does not require a decrease in strength due to welding as a strut fixing structure made of an aluminum alloy, not only can secure design strength, but also is easy to install / fix on site. Therefore, it is possible to meet the demand for high installation accuracy in electric poles for overhead lines of trains.

[0017]

As described above, according to the present invention, aluminum alloy stanchions such as utility poles, flag poles, and street lights can be fixedly installed with high strength by a simple structure. Demonstrate characteristics and reduce weight,
By facilitating the maintenance and facilitating the fixing and installation work, it contributes to the spread of the aluminum alloy in response to the demand.

[Brief description of drawings]

FIG. 1 Conventional installation and fixing structure of utility poles

FIG. 2 is a fixing structure according to a fixing tool of the present invention: an elevation view (a) showing a partial cross section, and a cross sectional view taken along line AA (b).

FIG. 3 is a perspective view of FIG.

FIG. 4 is another fixing structure of the present invention: an elevation view (a) showing a partial cross section, a cross sectional view taken along the line BB (b), and an enlarged view of the caulking portion (c).

[Explanation of symbols]

10: Fixture 11: Reinforcement band 12: Lower end plate 13: Reinforcement plate 20: Support 21,
22: Flange 23: Bent 25: Beam
26: Bracket 30: Anchor bolt 3
1: Foundation 50: Welded part of support and reinforcement band 5
1, 52, 53: Welded part 55: Caulking part 6
0: Welded part of support and reinforcement plate

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H02G 7/00 B60M 1/12 H02G 1/02

Claims (3)

(57) [Claims] 1. An aluminum alloy fixture for fixing an aluminum alloy column to a foundation, wherein the fixture comprises a lower end plate and a tubular reinforcing band, and the reinforcing band is divided into two or more parts in the axial direction. Type, and the lower end of the column is welded along the dividing edges of these divided reinforcing bands to be integrally connected, and the integrated lower end of the column is abutted and fixed to the lower plate to form an aluminum alloy column. Fixed structure. 2. The aluminum alloy column fixing structure according to claim 1, further comprising aluminum alloy reinforcing plates each having two sides welded to the reinforcing band and the lower end plate. 3. An aluminum alloy fixture for fixing an aluminum alloy column to a foundation, the fixture comprising a lower end plate, two or more reinforcing plates and a tubular reinforcing band, the reinforcing band being arranged in the axial direction. It is divided into two or more split types, and a reinforcement plate is welded to the lower end of the column along one side along its axial direction, and a reinforcement band is welded to the reinforcement plate along its division edge to be integrally joined, An aluminum alloy strut fixing structure in which the integrated lower end of the strut is brought into contact with and fixed to a lower end plate.