JPH10243513A - Connection fittings for prefabricated protectorless method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To constitute connection fittings suited to a protectorless compression clamp by interposing a first rectangular clevis link, a special rectangular clevis link and a second rectangular clevis link between a compression clamp attached to the end of a power transmission line and a wire connector for extending the wire. SOLUTION: A wire W for stringing is connected to a compression clamp C attached to a starting end side in a direction of wire of a power transmission line L through a first rectangular clevis link 1a, a special rectangular clevis link 2, a second clevis link 1b and a wire connector J. All of these should have a columnar shape, and each eye portion and each clevis portion are coupled by a cotter bolt in a freely rotatable manner. By doing this, when a compression clamp C passes through a metal wheel K for wire extension, forces which may create bending or twisting to the compression clamp C or clevis links 1a, 2, 2b can be effectively absorbed and the line extension can be carried out without attaching a protector to the compression clamp C.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connection fitting for a prefabricated camerless construction method, and more particularly to a transmission drum fitted with a compression type clamping clamp which is compressed and wound around a wire drum in a factory. The present invention relates to a prefabricated camerless connection metal fitting which can be carried into an extension line near a transmission line tower and can be extended without attaching a protector to a compression type retention clamp.

[0002]

2. Description of the Related Art Conventionally, in this type of prefabricated camerless construction method, a transmission line wound around an electric wire drum is wound around a drawing wheel and a wire drawing wheel provided on a transmission line steel tower to transmit each power. It is carried out by extending the wire between the towers, and at that time, a compression type clamp (hereinafter referred to as “compression clamp”) is attached by compression at the end of the transmission line,
At the end of the compression clamp opposite to the transmission line side, a cam-alongless fitting (hereinafter, referred to as a “camareless fitting”) is provided.

[0003] The Kamares bracket is formed of a right-angle clevis link having an overall outer shape substantially cylindrical, and a clevis portion of the right-angle clevis link is rotatably connected to an eye portion of a compression clamp. The eye portion of the right-angle clevis link is configured to be rotatably connected to the clevis portion of the wire connector for connecting the extension wire.

[0004] The above-mentioned compression clamp and Kamares fitting are:
When passing through the wire pulling wire and the wire pulling wire, the wire is easily damaged by the force such as bending or twisting.Therefore, in the case of wire drawing, the compression clamp is protected by a protector consisting of a steel cover. You. Then, the transmission line having the compression clamp protected by the protector passes through the drawing wire installed at the drawing site together with the above-described Kamares metal fitting and the wire connector to which the wire for the drawing wire is connected, and then is transmitted. The wire is stretched over a wire drawing wheel attached to the electric wire tower.

[0005]

By the way, the above-mentioned protector has a high strength so that it can sufficiently withstand the action of an abnormal force such as bending or twisting when passing through a wire drawing wheel and a wire drawing wheel. It is expensive because it is made from materials
In addition, since the work of attaching and detaching the protector involves the work of extending the wire, the clamp work is complicated. Therefore, to solve these problems, a compression clamp that does not need to be protected by the protector has been proposed.

[0006] However, even with this protectorless compression clamp, there is no force such as kinking when passing through the pulling wire and the pulling wire pulling wheel. The appearance of Kamares fittings that do not give is expected.

Accordingly, the present invention has been made to meet the above-mentioned demands, and an object of the present invention is to provide a connection fitting for a prefabricated camerless construction method which can be sufficiently applied even if a compression clamp is of a protectorless type. Is to do.

[0008]

SUMMARY OF THE INVENTION According to the present invention, there is provided a connecting bracket for a prefabricated camerless method,
One end is formed in a clevis portion connected to the eye portion of the compression clamp, and the other end is formed in a cylindrical first right-angle clevis link formed in the eye portion;
Is formed in the clevis part connected to the eye part of the right-angle clevis link, and the other end side is formed in the eye part, and has a tool mounting hole such as a looseness adjustment tool for tightening the transmission line in the middle. A cylindrical special right-angle clevis link, and a circle formed on one end of the clevis portion connected to the eye portion of the special right-angle clevis link, and the other end portion formed on an eye portion connected to the clevis portion of the wire connector. It is characterized by comprising a column-shaped second right-angle clevis link.

The eye of the first right-angle clevis link is provided between the first right-angle clevis link and the special right-angle clevis link or between the second right-angle clevis link and the wire connector. It has a clevis portion connected to the clevis portion of the special right-angle clevis link, or has a clevis portion connected to the eye portion of the second right-angle clevis link, and has a wire. A third rectangular right-angle clevis link having an eye portion connected to the clevis portion of the connector is interposed.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a part of a wire drawing wheel K when a transmission line L is drawn by a prefabricated camerless method using a connecting metal fitting for the prefabricated camerless method according to the present invention. Note that the wire drawing wheel K is provided on a transmission line tower (not shown), and is configured so that the transmission line L is laid over the wire drawing wheel K.

The compression clamp C, which is compressed and attached to the starting end of the transmission line L in the extending direction, is compressed and attached to the transmission line L in a factory beforehand. At C, a first right-angle clevis link, a special right-angle clevis link, and a second right-angle clevis link, which will be described later, are also wound around an electric wire drum (not shown) in a connected state. It is devised so that it can be reduced.

The electric wire drum is conveyed to a wire drawing site near a power transmission tower, and the transmission line L wound around the electric wire drum.
Is extended. In the state shown in FIG. 1, a wire for extension is connected to a power transmission line L wound around an electric wire drum via a wire connector described later, and the wire for extension is wound a predetermined number of times on a wire drawing vehicle (not shown). After passing through, the compression clamp C
Part has reached the wire drawing wheel K.

The other side of the compression clamp C, which is opposite to the transmission line L, is connected to a first right-angle clevis link 1a, a special right-angle clevis link 2, a second right-angle clevis link 1b and a wire connector J through a wire for extension. Connected to W. Each of these has an almost cylindrical overall shape.

FIG. 2A is a plan view showing a connection state from the compression clamp C to the wire connector J, and FIG. 2B is a side view thereof.

The first right-angle clevis link 1a is formed at one end with a clevis connected to the eye of the compression clamp C, and at the other end with an eye.

The special right-angle clevis link 2 has been previously proposed by the present applicant in Japanese Patent Application No. Hei 8-97591.
Two mounting holes 2a, 2a, 2b, 2c, which are provided substantially in the middle and are provided in a direction perpendicular to each other for mounting a hydraulic loosening adjusting tool or a tool for tightening such as a semi-metal wheel when tightening the transmission line L. 2b.

One end of the special right-angle clevis link 2 is formed as a clevis connected to the eye of the first right-angle clevis link 1a, and the other end is formed as an eye.

The second right-angle clevis link 1b has the same shape as the first right-angle clevis link 1a.
One end is formed in a clevis connected to the eye of the special right-angle clevis link 2, and the other end is formed in an eye connected to the clevis of the wire connector J.

In the figure, reference numerals 3a to 3d denote cotter bolts for rotatably connecting each eye portion and each clevis portion.

As described above, since the first right-angle clevis link 1a, special right-angle clevis link 2 and second right-angle clevis link 1b are interposed between the compression clamp C and the wire connector J, FIG. In the direction shown in FIG. 2A, there are two bent portions around the cotter bolts 3b and 3d. Also, in the direction shown in FIG. 2B corresponding to the bottom view of FIG. Thus, three bent portions are obtained around the cotter bolts 3a and 3c and the cotter bolt (not shown) of the clevis portion of the wire connector J.

Therefore, these bent portions form a kind of universal joint, and when the compression clamp C passes through the extension wheel and the extension wire wheel K, the compression clamp C and each of the clevis links 1a, 1b, 2 are attached. It is possible to effectively absorb a force that causes bending or twisting.

After the transmission line L is extended, the compression clamp C is connected to the insulator device via the vernier bracket by the tightening work, in which the second right-angle clevis link 1b is stretched over the transmission line tower. Mounted.

FIG. 3 shows another embodiment, in which FIG. 3A shows a first right-angle clevis between a first right-angle clevis link 1a and a special right-angle clevis link 2. FIG. A plan view of a state where a third right-angle clevis link 1c having the same shape as the link 1a and the second right-angle clevis link 1b is interposed, and FIG.

Thus, the three right-angle clevis links 1
When a to 1c are interposed between the compression clamp C and the wire connector J, the number of bent portions is increased, and the compression clamp C and each of the clevis links 1a to 1c, 2 are connected to the extension wheel and the extension wheel K. When passing through, the force which causes the compression clamp C and each of the clevis links 1a to 1c, 2 to bend or twist can be more effectively absorbed.

The above-mentioned third right-angle clevis link 1
c on the wire connector J side instead of the compression clamp C side,
That is, the third right-angle clevis link 1c may be provided between the wire connector J and the second right-angle clevis link 1b.

Although the above-mentioned compression clamp C is of a protectorless type, it is needless to say that the compression clamp C may be protected by a protector. Further, the compression clamp C
Instead, a wedge-shaped clamp that can pass through a wire drawing wheel may be used. Therefore, the term "compression clamp" in the present invention includes such a wedge-shaped clamp.

[0027]

According to the present invention, a connecting metal fitting for a prefabricated camerless method according to the present invention is formed in a cylindrical shape having one end formed on a clevis connected to an eye of a compression clamp and the other end formed on an eye. A right-angle clevis link, and a clevis portion having one end side connected to the eye portion of the first right-angle clevis link, and the other end side formed in the eye portion, and a tool such as a tightening tool in the middle. A cylindrical special right-angle clevis link having a mounting hole, and one end formed on the clevis portion connected to the eye portion of the special right-angle clevis link, and the other end formed on the eye portion connected to the clevis portion of the wire connector. Since it is composed of the formed cylindrical second right-angle clevis link, the compression clamp and the compression clamp generated when each clevis link passes through the drawing wheel or the wire drawing wheel. And bending and twisting in the clevis link can be effectively absorbed force to make him occur.

The eye of the first right-angle clevis link is provided between the first right-angle clevis link and the special right-angle clevis link or between the second right-angle clevis link and the wire connector. It has a clevis portion connected to the clevis portion of the special right-angle clevis link, or has a clevis portion connected to the eye portion of the second right-angle clevis link, and has a wire. When a cylindrical third right-angle clevis link having an eye portion connected to the clevis portion of the connector is interposed, when the compression clamp or each clevis link passes through a drawing wheel or a wire drawing wheel. It is possible to more effectively absorb the force that causes the generated compression clamp or each clevis link to bend or twist.

[Brief description of the drawings]

FIG. 1 is a perspective view of a pulling wire wheel portion when a power transmission line is drawn using a connecting metal fitting for a prefabricated camerless method according to an embodiment of the present invention.

FIG. 2A is a plan view of a connecting metal fitting for a prefabricated camerless method according to an embodiment of the present invention, and FIG. 2B is a side view thereof.

FIG. 3A is a plan view of a connection fitting for a prefabricated camerless method according to another embodiment of the present invention, and FIG. 3B is a side view thereof.

[Explanation of symbols]

 1a 1st right-angle clevis link 1b 2nd right-angle clevis link 1c 3rd right-angle clevis link 2 Special right-angle clevis link 2a, 2b Tool mounting hole 3a-3e Cotter bolt L Transmission line C Compression type clamp (compression clamp) J Wire Connector W Wire for wire drawing K Wheel for wire drawing

Claims (2)

[Claims] A first clevis link having a cylindrical shape formed at one end thereof and connected to an eye portion of the compression type clamping clamp, and having a second end formed at the eye portion; A clevis portion connected to the eye portion of the right-angle clevis link 1 and the other end side is formed in the eye portion, and a tool mounting hole for a looseness adjusting tool or the like for tightening a transmission line in the middle is formed. A special right-angle clevis link having a cylindrical shape and one end formed on a clevis portion connected to the eye portion of the special right-angle clevis link, and the other end formed on an eye portion connected to the clevis portion of the wire connector. A connecting metal fitting for a prefabricated camerless construction method, comprising: a cylindrical second right-angle clevis link; 2. An eye portion of the first right-angle clevis link between the first right-angle clevis link and the special right-angle clevis link or between the second right-angle clevis link and the wire connector. It has a clevis portion connected to the clevis portion of the special right-angle clevis link, or has a clevis portion connected to the eye portion of the second right-angle clevis link, and has a wire. The connecting metal fitting for a prefabricated camerless method according to claim 1, wherein a third cylindrical right-angle clevis link having an eye part connected to the clevis part of the connector is interposed.