JP2938802B2 - Branch line band for telephone pole - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to an electric pole, wherein a tail end side is overlapped with an auxiliary band piece, and a tightening bolt is attached to a tightening piece provided on a tip side of a pair of band pieces connected by connecting bolts. The present invention relates to a power pole branch line band in which the upper end of a branch line is directly or indirectly connected to a tightening bolt via a thimble.

[0002]

2. Description of the Related Art A tail end side is overlapped with an auxiliary band piece, and a tightening bolt is applied to a tightening piece provided on a tip side of a pair of band pieces connected by connecting bolts and tightened to a utility pole. Are known (there are so-called three-piece and four-piece types).

[0003]

SUMMARY OF THE INVENTION A branch line is to prevent a staying column to which electric wire tension coming from wind pressure or the like from coming only in one direction side or a through column to which an unbalanced load comes from a difference between right and left diameters from falling down. Therefore, if a branch line or a branch line band is broken, a number of utility poles fall down one after another, and the damage is greater than expected.

[0004] These branch lines are formed in a diagonal branch line which is stretched toward the ground at an angle of usually 45 degrees or less with respect to the upright electric pole in a direction opposite to the wire tension, and a horizontal branch line provided separately for the branch line. However, in the case of a branch band used for a diagonal branch line, the load acting in the horizontal direction on the utility pole as described above is applied to the tightening bolt which is a contact point between the branch line and the band. Acts in the direction (obliquely downward).
As a result, the tightening receiving piece side of the band piece appears as a force to turn the tightening receiving piece side downward below the electric pole around the connection bolt at the center of the electric pole when viewed from the side.

In the conventional band piece, a flat tail end is extended in a plane semicircular shape at the rear end of the tightening receiving piece having a sectional performance (structure) which is not easily deformed even by a horizontal load. This makes the structure easy to adapt to the power pole surface, and the tightening force of the tightening bolt makes the inner surface of the tail end contact the power pole peripheral surface over the front surface to strongly bind the power pole, and to withstand the load in the downward direction of the band piece Since the band piece is designed to increase the resistance and prevent the rotation in the obliquely downward direction, the band piece hardly slips down the utility pole surface with respect to the branch line load on the tightening bolt, and the load is reduced by the band piece. This acts as a load that attempts to bend the side of the band into a “H” shape, and the tensile load concentrates on the upper half of the band piece in the longitudinal direction on the upper side.

[0006] Therefore, when exposed to adverse conditions in which a tension exceeding the normal load is applied, the tensile load is concentrated on the upper side of the through hole of the connecting bolt having the smallest cross-sectional area of the band piece, and the horizontal proof stress is reduced. There is a risk of breaking at almost half the load.

[0007] From the above, the above-mentioned conventional example is constructed as a two-piece, separately from the horizontal branch line band, a high-strength diagonal branch line band having a thicker plate or a wider (expensive) plate. We are dealing.

The present invention focuses on the drawbacks of such a conventional example,
When an external force is applied to the tightening bolt in the tension direction by the branch line, the band piece is made to easily rotate around the connection bolt which is a connection portion with the auxiliary band piece, thereby improving the strength against the oblique branch line load. It is another object of the present invention to provide a branch line band having a strength equivalent to that of a horizontal branch line and applicable to diagonal branch lines.

[0009]

Means for Solving the Problems The tail end side is superimposed on the auxiliary band piece and the tightening bolt is transferred to a utility pole by applying a tightening bolt to a tightening receiving piece provided at the tip side of a pair of band pieces connected by connecting bolts. In the power pole branch line band that connects the upper end of the branch line, a through hole for inserting a connection bolt and a through hole for inserting a tightening bolt are provided on each inner peripheral surface of the pair of band pieces near the tightening receiving piece. A configuration in which a ridge located on the connecting line is provided.

[0010]

1 is a front view, FIG. 2 is a partially enlarged plan view of FIG. 1, and FIG. 3 is a front view of a band piece according to the present invention. 4 is a plan view of the band piece, and FIG. 5 is a sectional view taken along line aa of FIG.

In the embodiment, appropriate ones of the through holes 2, 2, 2 arranged in a row on the tail end side of the pair of band pieces 1, 1 are respectively replaced by separate tail end sides of the auxiliary band pieces 3, 3. Through holes 2 ', 2', and 2 ', and through which connection bolts 4 are passed, and connection nuts 5 are screwed into the connection bolts 4 to be connected thereto. A through-hole 7 formed in a tightening receiving piece 6 protruding outward from the utility pole D at the tip end of the power pole 1, 1
, A tightening nut 9 is screwed into the tip of the tightening bolt 8, and similarly to the band pieces 1, 1, the tightening bolts 8 are attached to the tightening receiving pieces 6 'provided on the tip side of the auxiliary band pieces 3, 3. The present invention is applied to a so-called four-piece power pole branch line band in which a tightening bolt 8 'is used, a tightening nut 9' is screwed, tightened and wound around a power pole D.

The band piece 1 and the auxiliary band piece 3 have the same shape as each other. Instead of the auxiliary band piece 3, a band having connecting bolt through holes (having the same shape as the through holes 2 and 2 ') is provided at both ends. The present invention is naturally applicable to a so-called three-piece type power pole branch line band using a piece (corresponding to the auxiliary band piece in the present invention).

In the embodiment, when assembling the tightening bolt 8 to the band pieces 1 and 1 by penetrating the through holes 7 and 7, the thimble 10 is assembled so that the bolt 8 penetrates. The inner ends 1a, 1a of the band pieces 1, 1 near the tightening receiving pieces 6, 6 are connected to the through holes 2 for inserting the connecting bolts 4 therethrough. A protruding ridge 13 located on a straight line connecting the through holes 7 for inserting the tightening bolts 8 is provided so as to protrude, and only the protruding ridge 13 of the band piece 1 near the tightening receiving piece 6 comes into contact with the peripheral side surface of the utility pole D. It is.

However, as described above, only the ridge 13 is in contact with the peripheral side surface of the utility pole on the side of the tightening piece 6 of the band piece 1, so that the contact resistance with the utility pole surface is small, and a large load exceeding the normal load is obtained. When the tension is applied, the band pieces 1 and 1 rotate around the connection bolt 4 while deforming the tail end side along the telephone pole peripheral surface and move in the direction coinciding with the load line in the branch line direction. The load is evenly received over the entire minimum cross section of the tail end (two through holes for inserting the connection bolt 4).

[0015]

According to the present invention, since the band piece is displaced in the direction corresponding to the load line under the worst conditions, the load is not concentrated on a part, and the maximum proof stress ( (Equivalent to horizontal strength), so there is no need to worry about the band breaking, so there is no need to use a band that is expensive as in the past, especially by increasing the plate thickness. became.

[Brief description of the drawings]

FIG. 1 is a front view.

FIG. 2 is a partially enlarged plan view of FIG. 1;

FIG. 3 is a front view of a band piece.

FIG. 4 is a plan view of a band piece.

FIG. 5 is a sectional view taken along line aa of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Band piece 2 Through hole 3 Auxiliary band piece 4 Connection bolt 6 Tightening receiving piece 7 Through hole 8 Tightening bolt 12 Branch line 13 Protrusion

Claims (1)

(57) [Claims] 1. A tail end side is overlapped with an auxiliary band piece, a tightening bolt is applied to a tightening piece provided on a tip side of a pair of band pieces connected by connecting bolts and tightened to a utility pole, and the upper end of a branch line is connected to the tightening bolt. In a power pole branch line band that is connected to a pair of band pieces, the inner peripheral surface of each of the pair of band pieces is located on a line connecting a through hole for inserting a connecting bolt and a through hole for inserting a tightening bolt. A branch line band for utility poles with ridges.