JP2000333329A - Method for adjusting slackness and slackness adjusting tool used in the method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hydraulic slackness adjusting tool which allows the direction of adjusting the spacing between vernier hardware to coincide with the direction of stringing transmission lines. SOLUTION: This slackness adjusting tool (a) is used to adjust the slackness in a transmission line connected to a transmission line iron tower via vernier attachment 1. The slackness adjusting tool a is provided with plates 10a and 10b positioned on both the sides of the vernier hardware 1 in the direction of stringing the transmission line. Furthermore, an expanding mechanism the direction of whose expansion coincides with the direction of stringing the transmission line is installed between the plates.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sag adjustment method for adjusting sag of a transmission line connected to a transmission line tower via a vernier bracket, and a sag adjustment tool used for the sag adjustment. About.

[0002]

2. Description of the Related Art FIG. 3 is a schematic view of a transmission line L using a sag adjustment tool (hereinafter referred to as "adjustment tool") A already provided on the market as a "hydraulic sag adjustment tool". This shows a state in which the sag adjustment is being performed.

In FIG. 3, reference numeral 1 denotes a vernier metal fitting. The vernier metal fitting 1 sandwiches one middle plate 1a made of a flat and long plate material from both sides. It consists of an inner plate 1a and two outer plates 1b, 1b,
One end of the outer plates 1b, 1b are overlapped on both sides of one end of the middle plate 1a. And these two plates 1a, 1b
In the overlapping portion of the above, a plurality of adjustment holes 2, 2 are kept at a predetermined interval.
Are provided so that the matching state of the adjustment holes 2 can be adjusted to adjust the interval between the vernier fittings 1, that is, the entire length of the vernier fittings 1.

[0004] The vernier fitting 1 is connected at one end to an unillustrated power transmission tower (hereinafter referred to as a "pylon") via an insulator (not shown) and a yoke fitting (not shown). At the same time, a filament L is connected to the other end via a clamp C. The triangular mounting brackets 3 provided on both sides of the vernier bracket 1, respectively.
The adjustment tool A is configured to be mounted between a and 3b. In FIG. 3, reference numeral 4 denotes a connection fitting for connecting one mounting fitting 3a to the intermediate plate 1a of the vernier fitting 1.

The adjusting tool A has two mounting brackets 3a, 3 at its lower end.
b, a pair of plates 6a, 6b having holes for coupling to the mounting holes 5a, 5b provided in the two plates 6a, 6b.
It comprises a rod 7 rotatably connecting the intermediate position of 6b and a hydraulic cylinder 8 rotatably provided at the upper ends of both plates 6a, 6b.

The adjusting tool A adjusts the hydraulic pressure of the hydraulic cylinder 8 so that the lower ends of the pair of plates 6a and 6b rotate about both ends of the rod 7, respectively. , 6a such that the distance between the lower ends thereof is adjusted.

In order to adjust the slackness of the filament L using the adjusting tool A, first, as shown in FIG. 3, the mounting holes 5a, 5b of the mounting brackets 3a, 3b on both ends of the vernier bracket 1.
The lower ends of the plates 6a and 6b are connected by bolts and nuts, and the adjustment tool A is set on the vernier fitting 1.

Next, the hydraulic pressure of the hydraulic cylinder 8 is adjusted, and the tension of the wire L is held by the adjusting tool A.
a and bolts and nuts that fixed the outer plates 1b and 1b (in FIG. 3, black holes indicate a state where fixing tools such as bolts and nuts or pins are set).
The bolts and nuts are inserted into the holes 2 of the middle plate 1a and the holes 2 of the outer plates 1b, 1b where the slack of the filament L becomes a predetermined value, and the plates 1a, 1b are fixed. Is done. After the fixing is completed, the tension of the filament L is transferred to the vernier fitting 1, the plates 6a, 6b are removed from the mounting fittings 3a, 3b, and the sag adjustment is completed.

[0009]

In the above-mentioned conventional adjusting tool, a pair of plates linearly move a vernier fitting by using a circular movement in which a pair of plates rotate around a rod, so that the motion efficiency is reduced and the circular movement is reduced. There was a drawback that the mounting bracket was enlarged by the amount of exercise. Such a drawback is that even if the mounting position of the rod and the hydraulic cylinder is changed,
In the adjustment tool A shown in FIG. 3, the same applies when the hydraulic cylinder 8 is installed at the position of the rod 7 and the rod 7 is installed at the position of the hydraulic cylinder 8.

Accordingly, the present invention solves the above-mentioned drawbacks and provides a sag adjustment method capable of efficiently moving the vernier fitting, and provides an adjusting tool suitable for implementing the sag adjustment method. It is in.

[0011]

In order to achieve the above-mentioned object, the sag adjustment method according to the present invention adjusts the sag of a transmission line connected to a steel tower via a vernier fitting by adjusting the spacing between the vernier fittings. In the sagging adjustment method performed by adjusting the length of the transmission line, the interval adjustment of the vernier fittings is performed in a state in which the direction of the transmission line stretched over the transmission line tower is matched.

[0012] In order to achieve the above object, the adjusting tool according to the present invention is a sag adjusting tool used for adjusting the sag of a transmission line connected to a transmission line tower via a vernier bracket. Plates are provided on both sides of the vernier fitting in the direction in which the transmission line is stretched, and an extension mechanism is provided between the plates so that the extension and contraction direction matches the direction in which the transmission line is stretched. Further, the extension mechanism is characterized by comprising a pair of hydraulic cylinders provided so as to sandwich the vernier fitting in the middle.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1A is a plan view of a vernier fitting 1 according to an embodiment for carrying out a sag adjusting method of the present invention, and FIG. 1B is a view showing an adjustment tool a attached to the vernier fitting 1. FIG. 2 is a right side view of FIG. 1B. The same components as those in FIG.
Description will be made using the same reference numerals.

First, the vernier fitting 1 will be described. The vernier fitting 1 has the same configuration as the well-known vernier fitting shown in FIG. 3 and is an intermediate plate 1a made of one flat long plate. And sandwich the middle plate 1a from both sides,
Further, it is composed of two outer plates 1b, 1b having the same shape as the middle plate 1a, and is formed by superimposing one end of the outer plates 1b, 1b on both sides of one end of the middle plate 1a. A plurality of adjusting holes 2, 2,... Are provided at predetermined intervals in the overlapped portion of the two plates 1a, 1b. That is, the entire length of the vernier fitting 1 can be adjusted.

On both sides of the vernier fitting 1, triangular mounting fittings (mounting plates) 3a, 3b for mounting the adjusting tool a are provided, and one of the mounting fitting 3a and the vernier fitting 1 are provided. Between the middle plate 1a and the middle plate 1a, there is provided a connection fitting 4 formed with clevis on both sides for connecting one of the mounting fittings 3a to the middle plate 1a. Although the mounting brackets 3a and 3b have a triangular shape, they may have a quadrangular (rectangular) shape. Also, one of the mounting brackets 3a, 3b
a (or 3b) is connected to the transmission line L (not shown), and the other mounting bracket 3b (or 3a) is connected to the tower (not shown), that is, in the state shown in FIG. A line connecting the adjustment holes 2, 2,.
Holes 5a and 5b for mounting the adjustment tool a are provided on the horizontal one-dot chain line in (b)).

The adjusting tool a has a pair of plates 10a, 10a, 10b, 10b of the same size which can sandwich the mounting brackets 3a, 3b located on both sides of the vernier bracket 1 so as to cross from both sides. At the same time, a pair of hydraulic cylinders 11a, 11b are provided on the upper and lower ends of the plates 10a, 10a, 10b, 10b, respectively. Plates 10a, 10a, 10b, 10b
The plates 10a, 10a,
The holes (FIG. 1) for attaching the mounting members 10b, 10b to the holes 5a, 5b provided in the mounting brackets 3a, 3b, respectively.
(See (5a) and (5b) of (b)).

A steel tower (not shown) via the vernier fitting 1
In order to adjust the slackness of a power transmission line (not shown) stretched over the mounting tool, first, an adjusting tool a is attached to the holes 5a and 5b provided in both the mounting brackets 3a and 3b. That is, both plates 10a, 10a, 10b,
10b, the mounting brackets 3a, 3b are respectively sandwiched, and both plates 10a, 10a, 10b, 10b
And the mounting brackets 3a and 3b are connected to each other (FIG. 1).
(B), see FIG. 2).

When the adjusting tool a is mounted on both sides of the vernier fitting 1, the rods 1 of the hydraulic cylinders 11a and 11b are
When 2a and 12b are respectively reduced, the vernier fitting 1
Can be released. The driving direction of the hydraulic cylinders 11a and 11b can be performed in parallel with the moving direction of the vernier fitting 1. That is, the movement direction of the hydraulic cylinders 11a and 11b (the movement direction on the dashed line in FIG. 1B) and the movement direction of the vernier fitting 1 can be matched. Each hydraulic cylinder 1
The supply of the hydraulic pressure to 1a and 11b is configured such that the hydraulic pressure from one hydraulic pump (not shown) is branched and supplied.

When the tension load of the vernier fitting 1 can be released, the bolts and nuts connecting the two plates 1a, 1b, 1b are removed, and the hydraulic cylinders 11a, 11b are expanded and contracted to adjust the two plates 1a. , 1b and 1b are selected so as to be at predetermined positions. After the bolts and nuts are attached to the holes, the hydraulic cylinders 11a and 11b are adjusted to transfer the tension load to the vernier fitting 1, and then the adjusting tool a is removed from the mounting fittings 3a and 3b to adjust the looseness. It ends.

As described above, since the movement when adjusting the interval between the vernier brackets 1 is parallel to the movement of the hydraulic cylinders 11a and 11b, the mounting brackets 3a and 3b need to consider the conventional circular motion. Because there is no, it can be downsized.

In the above example, the plates 10a, 10a, 10b, 10b of the adjusting tool a are
Are mounted on the mounting brackets 3a and 3b provided on both sides of the vernier, respectively, by using the mounting holes and the like of the connecting bracket 4 and the mounting bracket 3b provided on both sides of the vernier bracket 1, that is, the vernier. It may be directly attached to both sides of the metal fitting 1. This makes it possible to omit components such as the mounting fittings 3a and 3b and the connecting fitting 4.

[0022]

In the sag adjusting method according to the present invention, the distance between the vernier brackets is adjusted in the same direction as the direction of the transmission line stretched over the power transmission tower. The wire can be moved in accordance with the direction in which the wire is stretched, and the sag can be adjusted efficiently.

The adjusting tool according to the present invention is provided with plates located on both sides of the vernier metal fitting in the direction in which the transmission line is extended, and between the plates, the expansion and contraction direction matches the direction in which the transmission line is extended. The driving direction of the hydraulic mechanism and the direction of adjusting the distance between the vernier brackets match, and there is no circular motion as in the conventional case. Therefore, the mounting brackets and the like can be reduced in size, and the driving force of the hydraulic mechanism can be reduced without waste. Can be acted upon. Further, when the expansion and contraction mechanism is constituted by a pair of hydraulic cylinders provided with a vernier fitting in the middle, the hydraulic mechanism can be easily realized.

[Brief description of the drawings]

FIG. 1A is a plan view of a vernier fitting before an adjustment tool according to an embodiment of the present invention is attached, and FIG. 1B is a front view of the vernier fitting with the adjustment tool attached thereto. .

FIG. 2 is a right side view of FIG. 1 (b).

FIG. 3 is an explanatory diagram when adjusting the sag using a conventional adjusting tool.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vernier metal fitting 1a Middle plate 1b Outer plate 3a, 3b Mounting metal fitting 4 Connection metal fittings a Sag adjustment tool (adjustment tool) 10a, 10b Plate 11a, 11b Hydraulic cylinder 12a, 12b Rod

[Procedure amendment]

[Submission date] May 24, 1999 (1999.5.2
4)

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

FIG. 2

FIG. 3

Claims (3)

[Claims] 1. A sag adjustment method for adjusting a sag of a transmission line connected to a transmission line tower via a vernier jig by adjusting an interval between the vernier jigs. A sag adjustment method, wherein the method is carried out in a state where the direction of the transmission line stretched over the power transmission tower is matched with the direction in which the transmission line is stretched. 2. A sag adjustment tool used when adjusting sag of a transmission line connected to a transmission line tower via a vernier bracket, comprising: A slackness adjusting tool comprising: plates provided at respective positions; and a telescopic mechanism in which a telescopic direction coincides with a direction in which the transmission line is stretched between the plates. 3. The sag adjusting tool according to claim 2, wherein the extension mechanism comprises a pair of hydraulic cylinders provided so as to sandwich the vernier fitting in the middle.