JP2008095456A - Pole - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent the occurrence of looseness of an arm mounting band in a strong wind. <P>SOLUTION: A concrete pole 101 has an upper pole part 110 and a lower pole part 120. The lower pole part 120 is tapered to be thicker toward the lower end from the upper end. The upper pole part 110 is not tapered. When a band-like contact fitting (the arm mounting band) 211 is fixed to the upper pole part 110, a subtle space like the case of using a conventional tapered concrete pole is not formed between the upper part of the contact fitting 211 and the outer surface of the upper pole part 110. The upper pole part 110 and the lower pole part 120 are independently formed, and the lower end of the upper pole part 110 and the upper end of the lower pole part 120 are joined using flange parts 111, 121 to facilitate manufacture. A projection 114 for preventing the downward slip of the contact fitting 211 is formed at the upper pole part 110, corresponding to the fixed position of the band-like contact fitting 211. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a utility pole such as a concrete pillar that supports electric wires.

  6 and 7 show the configuration of the distribution column portion of the low voltage distribution using the concrete column 201. FIG. The concrete column 201 has a cylindrical structure with a hollow inside. The concrete column 201 has a taper of 1/75, 1/110 or the like such that the diameter of the upper end is smaller than the diameter of the lower end and becomes narrower from the lower end toward the upper end. By tapering the concrete pillar 201 in this way, it is possible to reduce the weight and to reduce the influence of wind on the upper end side. The taper of the concrete column is described in, for example, Patent Document 1.

  A brace 202 is attached to the top of the concrete pillar 201. The arm metal 202 is fixed to the concrete column 201 by using a band-shaped metal fitting 211 as a arm metal attachment band, a pair of bolts 212, and a pair of nuts 213. The abutment 211 is connected to the contact portion 211a that is in contact with the concrete column 211 in a state of being wound around the concrete column 201 in a circumferential direction by a predetermined angular range, and both ends in the circumferential direction of the contact portion 211a. It has a pair of extension part 211b by which the bolt insertion hole (not shown) for letting a volt | bolt pass is drilled.

  In this case, the metal fitting 211 is arranged so that the contact portion 211a contacts the side opposite to the side on which the arm metal 202 of the concrete pillar 201 is contacted, and the pair of bolts 212 are respectively connected to the metal fitting 211. The bolts are inserted through the bolt insertion holes 202a of the pair of extension portions 211b and the bolt insertion holes 202a of the arm metal 202 in order, and then the nuts 213 are screwed into the screw portions 212a protruding from the arm metal 202 of the pair of bolts 212. Gold 202 is fixed to the concrete pillar 201. A washer 207 is interposed between the arm metal 202 and the nut 204.

A low-pressure retaining insulator 205 is fixed to the arm metal 202 attached to the concrete pillar 201. A low-voltage distribution line W as an overhead wire is supported on the low-pressure detention insulator 205. The illustrated example shows a single-phase three-wire distribution line. A cap 206 for protecting the utility pole is attached to the top of the concrete pole 201 so that rainwater or the like does not enter the inside.
JP 2005-194768 A

  As described above, the arm metal 202 is attached to the upper part of the concrete column 201 using the band-shaped metal fitting 211. In this case, a delicate space is formed between the upper portion of the metal fitting 211 and the outer surface of the concrete column 201 due to the above-described taper of the concrete column 201.

  The upper part of the concrete pillar 201, the arm metal 202 attached to the upper part, and the distribution line W supported by the arm metal 202 are always shaken by the influence of the wind. In particular, during a strong wind such as a typhoon, the distribution line W is lifted upward, and the arm 202 is lifted upward due to the influence. In such a case, there are many cases in which the metal fitting 211 is loosened and a problem such as dropping of the arm metal 202 occurs.

  The objective of this invention is providing the utility pole which prevents generation | occurrence | production of the slack of a bracelet attachment band.

The concept of this invention is
An upper post that is not tapered;
An electric pole having an upper end connected to a lower end of the upper column portion and a lower column portion tapered so as to become thicker toward the lower end.

  The utility pole of this invention is comprised from the upper pillar part arrange | positioned at the upper part, and the lower pillar part arrange | positioned at the lower part. The lower column portion is tapered so as to become thicker from the upper end toward the lower end, but the upper column portion is not tapered. Therefore, for example, when a bracelet attachment band is fixed to the upper column part, a conventional delicate space cannot be formed between the upper part of the bracelet attachment band and the outer surface of the upper column part. Therefore, even if the distribution line is lifted upward in a strong wind such as a typhoon, the armrest is not lifted upward and the armrest attachment band is not loosened.

  For example, the electric pole is a concrete pole, and the upper pillar portion and the lower pillar portion are formed as separate bodies. And the lower end of an upper pillar part and the upper end of a lower pillar part are spliced together by the joint part. Since a concrete column is manufactured in a state in which a reinforcing bar (steel wire) is stretched with high tension, it is difficult to manufacture a concrete column whose taper is changed in the middle. By manufacturing the upper column portion and the lower column portion as separate bodies, the electric pole of the present invention can be easily manufactured.

  For example, the upper column portion includes a non-slip portion that prevents the arm metal mounting band from sliding downward corresponding to the fixing position of the arm metal mounting band. The anti-slip portion is constituted by a protrusion, a plurality of protrusions, and the like. As described above, since the upper pillar portion is not tapered, the bracelet attachment band fixed to the upper pillar portion easily slides down. By adopting a configuration in which the upper pillar portion is provided with the anti-slip portion, even if the taper is not attached, the downward movement of the bracelet attachment band is prevented. In this case, the anti-slip portion may further have a function of indicating the fixing position of the armband attachment band.

  According to the present invention, it is possible to prevent the occurrence of loosening of the armband attachment band fixed to the upper column part.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2A show the configuration of a concrete column 101 as an embodiment.

  The concrete pillar 101 has an upper pillar part 110 and a lower pillar part 120. The upper column part 110 is not tapered. That is, the upper column part 110 is formed with the same diameter from the upper end to the lower end. The lower column portion 120 is tapered so as to become thicker from the upper end toward the lower end. That is, the lower column portion 120 has a lower end diameter larger than an upper end diameter.

  The concrete column 101 is configured by connecting the upper end of the lower column 120 to the lower end of the upper column 110. In this embodiment, the upper pillar portion 110 and the lower pillar portion 120 are formed as separate bodies, and are integrally provided at the upper end of the lower pillar portion 120 and the flange portion 111 provided integrally at the lower end of the upper pillar portion 110. A single concrete pillar 101 is obtained by joining the flange portion 121 provided on the slab using a bolt 131 and a nut 132. Here, the flange portions 111 and 121 constitute a joint portion for connecting the lower end of the upper column portion 110 and the upper end of the lower column portion 120.

  On the upper column part 110 constituting the concrete column 101, a protrusion 114 that prevents the arm metal mounting band from sliding downward is integrated with the upper column part 110 in correspondence with the fixing position of the arm metal mounting band. Is formed. The protrusion 114 is basically formed along the outer periphery of the upper column part 110, but the portion corresponding to the attachment position of the brace (indicated by the arrow P) is obstructive to the attachment of the brace. It is cut out. The protrusion 114 constitutes a non-slip portion.

Note that the anti-slip portion is not limited to the above-mentioned protrusion 114, for example, as shown in FIG. 2B, constituted by a plurality of protrusions 115 provided with a predetermined angular interval, or not shown, A configuration is also conceivable in which a through hole is provided at a fixing position of the arm metal mounting band of the upper column part 110 and a bolt for preventing slipping is fixed using the through hole.

  FIG. 3 shows a detailed structure of a joint portion between the upper column part 110 and the lower column part 120. The upper column part 110 is formed in a cylindrical shape by the concrete 141u. Inside the concrete 141u, a steel wire 142u is disposed as a reinforcing bar. A steel plate 143 u constituting the flange portion 111 is disposed at the lower end of the upper column portion 110. The lower end side of the steel wire 142u disposed in the concrete 141u and extending in the longitudinal direction of the upper pillar portion 110 penetrates the steel plate 143u, and its head is crushed and fixed to the steel plate 143u. Has been. Thus, the steel wire 142u fixed to the steel plate 143u is under tension on the concrete 141u side, that is, upward.

  The lower column portion 120 is also configured in the same manner as the upper column portion 110 described above. That is, the lower column part 120 is formed in a cylindrical shape by the concrete 141d. Inside this concrete 141d, a steel wire 142d as a reinforcing bar is arranged. A steel plate 143d constituting the flange portion 121 is disposed at the lower end of the lower column portion 120. The upper end side of the steel wire 142d disposed in the concrete 141d and extending in the longitudinal direction of the lower column portion 120 passes through the steel plate 143d and its head is crushed and fixed to the steel plate 143d. Has been. In this manner, the steel wire 142d fixed to the steel plate 143d is under tension on the concrete 141d side, that is, downward.

  Although not shown in FIG. 1 and FIG. 2 described above, a reinforcing band 144u is wound around the lower end side outer periphery of the upper pillar 110 to reinforce the concrete portion at the lower end of the upper pillar 110. Similarly, a reinforcing band 144 d for reinforcing the concrete portion at the upper end of the lower column part 120 is wound around the upper end side outer periphery of the lower column part 120.

  4 and 5 show the configuration of the distribution column portion of the low-voltage distribution using the concrete column 101 described above. 4 and 5, the same reference numerals are given to the portions corresponding to those in FIGS. 6 and 7, and the detailed description thereof will be omitted as appropriate.

  A brace 202 is attached to the upper column portion 110 of the concrete column 101. The arm metal 202 is fixed to the concrete column 101 by using a band-shaped metal fitting 211 as a arm metal attachment band, a pair of bolts 212, and a pair of nuts 213. In this case, the lower end of the band-shaped brace 211 is brought into contact with the protrusion 114 provided on the upper column part 110.

  A low-pressure retaining insulator 205 is fixed to a brace 202 attached to the concrete pillar 101. A low-voltage distribution line W as an overhead line is supported on the low-pressure retaining insulator 205. A cap 206 for protecting the utility pole is attached to the top of the concrete pillar 101 so that rainwater or the like does not enter inside.

  The concrete column 101 shown in FIGS. 1 and 2 is composed of an upper column portion 110 and a lower column portion 120, and the lower column portion 120 is tapered so as to become thicker from the upper end toward the lower end. However, the upper column part 110 is not tapered. Therefore, when a band-shaped metal fitting (armband attachment band) 211 is fixed to the upper column part 110 (see FIGS. 4 and 5), between the upper part of the metal plate 211 and the outer surface of the upper column part 110. A delicate space as in the case of using the conventional concrete pillar 201 (see FIGS. 6 and 7) cannot be made. Therefore, the use of the concrete pillar 101 prevents the arm bracket 202 from being lifted upward and the brace 211 from being loosened even when the distribution line W is lifted upward in a strong wind such as a typhoon. Problems such as dropping of the gold 202 can be reduced.

  Moreover, in the concrete pillar 101 shown in FIG. 1 and FIG. 2, the upper pillar part 110 and the lower pillar part 120 are formed separately, and the lower end of the upper pillar part 110 and the upper end of the lower pillar part 120 are the flange parts 111 and 121. It is the composition joined together using. Since a concrete column is manufactured in a state where a reinforcing bar (steel wire) is stretched with high tension, it is difficult to manufacture a concrete column whose taper is changed in the middle. Therefore, the concrete column 101 that is manufactured separately from the upper column portion 110 and the lower column portion 120 can be easily manufactured.

  Moreover, in the concrete pillar 101 shown in FIG. 1 and FIG. 2, the upper pillar part 110 has a protrusion 114 that prevents the arm metal mounting band from sliding downward corresponding to the fixing position of the arm metal mounting band. Is formed. For this reason, when the band-shaped fitting (armband attachment band) 211 is fixed to the upper column part 110, the lower end of the fitting 211 is brought into contact with the protrusion 114, so that the fitting 211, and hence the arm. The downward sliding of the gold 202 can be prevented. Further, when fixing the band-shaped metal fitting (armband attachment band) 211 to the upper column part 110, the operator can know the mounting position of the metal fitting 211 by using the protrusion 114, and the metal fitting 211 The attachment work of the brace 202 using the can can be performed efficiently.

  In addition, although the above-mentioned embodiment applies this invention to the concrete pillar 101, this invention is naturally applicable also to another kind of electric pole, for example, a steel pipe pillar.

  The present invention can prevent the loosening of the bracelet attachment band during a strong wind, and is effective when applied to, for example, a utility pole used in a windy place.

It is a side view which shows the structure of the concrete pillar as embodiment. It is the perspective view which abbreviate | omitted one part which shows the structure of the concrete pillar as embodiment. It is the side view which cut partly which shows the detailed structure of the junction part of an upper pillar part and a lower pillar part. It is a side view which shows the structure of the distribution pillar part of the low voltage | pressure distribution using the concrete pillar as embodiment. It is the perspective view which abbreviate | omitted one part which shows the structure of the distribution pillar part of the low voltage | pressure distribution using the concrete pillar as embodiment. It is a side view which shows the structure of the distribution pillar part of the low voltage | pressure distribution using the conventional concrete pillar. It is the perspective view which abbreviate | omitted one part which shows the structure of the distribution pillar part of the low voltage | pressure distribution using the conventional concrete pillar.

Explanation of symbols

  101 ... Concrete pillar, 110 ... Upper pillar part, 111 ... Flange part, 114 ... Projection, 115 ... Projection, 120 ... Lower pillar part, 121 ... Flange part, 131 ... bolts, 132 ... nuts, 141u, 141d ... concrete, 142u, 142d ... steel wire, 143u, 143d ... steel plates, 144u, 144d ... reinforcement bands

Claims (3)

An upper post that is not tapered;
An electric pole comprising: an upper end connected to a lower end of the upper pillar part; and a lower pillar part tapered so as to become thicker toward the lower end. The utility pole is a concrete pole,
The upper pillar part and the lower pillar part are formed as separate bodies,
The utility pole according to claim 1, further comprising a joint portion for connecting the lower end of the upper column portion and the upper end of the lower column portion. The electric pole according to claim 1, wherein the upper column portion includes a non-slip portion that prevents the arm metal mounting band from sliding downward corresponding to a fixing position of the arm metal mounting band.

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