JPH09142179A - Trolley wire prefabricating construction method and prefabricated trolley wire - Google Patents

Abstract

PROBLEM TO BE SOLVED: To integrate a catenary and a trolley wire and string them simultaneously by fitting a trolley wire with the catenary delivered according to a space between supporting poles and hangers. SOLUTION: A prefabricated trolley wire 1 is formed by engaging the upper end parts of hangers 3 with a catenary 2 delivered according to a premeasured space between supporting poles and hanging the hangers 3. A trolley wire 4 of specified length is engaged with the lower end parts of the hangers 3, and the trolley wire 4 is held almost horizontally. The trolley wire 4 has constricted parts 5, continuous in the axial direction of the wire, on both sides of upper half part, and an electric wire grip part 6 forming the lower end part of the hanger 3 is engaged with both constricted parts 5. The electric wire grip part 6 is formed being divided in two pieces along the trolley wire 4 at the top part of the trolley wire 4, and these two pieces are fastened to each other by a screw 7 or the like and grip both constricted parts 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trolley wire and a method of installing the suspension wire between the supporting columns such as a plurality of steel towers and suspending the trolley wire from the suspension wire via a hanger. More particularly, the present invention relates to a prefabricated construction method of a trolley wire and a prefabricated trolley wire in which a suspension wire and a trolley wire whose length is adjusted to the interval between steel towers and a terminating wire are integrated and simultaneously installed.

[0002]

2. Description of the Related Art Generally, a trolley wire is constructed by suspending a large number of hangers on a suspending wire that is hung between a plurality of supporting columns such as steel towers, and suspending and supporting the trolley wires on the hangers. . Conventionally, when constructing a trolley wire, a method has been adopted in which a hanger wire and a trolley wire are first extended and tightened separately, then these are placed in a predetermined arrangement, and then a hanger is attached. FIG. 4 shows a trolley wire installation situation according to a conventional method.

As shown in FIG. 4, a large number of steel towers (not shown) are arranged in an array along the line on which the trolley wire 40 is installed, along which rails 41 are laid. There is. Above the rail, work protective ground wire 4
2 is placed in advance. On the rail 41, a drum carriage 44 having a hanging wire drum 43 and a drum carriage 46 having a trolley wire drum 45 are provided side by side in the traveling direction. The drum carriages 44 and 46 are provided on the rail 41.
The lifting wire 47 or the trolley wire 40 can be sent out with a predetermined tension by rotating the drum while moving forward. Two work platforms 48 are provided on the rear rails 41 of the drum carriages 44 and 46. Work table 48
Has wheels and can move on the rail 41. Workbench 4
8 has a scaffold of a predetermined height and is used for hanger attachment work. The workbench 48 arranged in the front is for mounting the temporary hanger 49, and the workbench arranged in the rear is for mounting the hanger 50. The suspension wire 47 extended from the drum carriage 44 located in the front is bridged between the supports 51 fixed for each steel tower. This drum truck 44
The drum carriage 46 moves behind and the trolley wire 40 fed from the drum carriage 46 is temporarily hung from the suspender wire 47 via the temporary hanger 49. Since the hanging wire 47 and the trolley wire 40 extended in this way are bent in an uneven manner, tension is applied to each to straighten them,
Raise it to the specified position. After that, the length of the trolley wire 40 is measured, the mounting intervals of the hangers 50 are determined based on this length, and the hangers 50 are attached instead of the temporary hangers 49.

[0004]

The above-mentioned conventional overhead wire construction method has the following problems.

(1) The two wires consisting of the hanging wire 47 and the trolley wire 40 are extended by different working groups, and the drum carriage 44 carrying these wires,
Since 46 moves back and forth on the same rail 41, in order to proceed with the work at the same time, the work is advanced in accordance with the drum carriage having the slow work speed, and the overall work time cannot be shortened.

(2) Since it is necessary to match the feeding amount of the trolley wire 40 and the feeding amount of the hanger wire 47, it is necessary to make the work speeds the same, but it is difficult to adjust both speeds.

(3) It is difficult to reduce the working time because the hanger 50 cannot be mounted until the trolley wire 40 and the hanger wire 47 have been pulled up to the prescribed positions.

(4) There are two drum carriages and two worktables, each of which must have a worker involved in the work, which requires a large number of workers as a whole.

(5) Since the mounting interval of the hangers 50 is set after measuring the length of the trolley wire 40 on site, the working time for mounting the hangers becomes long.

(6) After the two wires consisting of the hanging wire 47 and the trolley wire 40 have been extended, tension is applied to these two wires to straighten the uneven shape. Since the work is performed on the two lines individually, it takes time.

In order to improve the efficiency of the trolley wire installation, the above problems must be solved. The applicant measured the distance between the supporting columns in advance and used a prefabricated trolley wire (a trolley wire, a hanger wire, and a hanger that were assembled to a nearly completed state) to match the length, and the overhead wire was stretched at once. I thought it was impossible. By doing so, the working time can be significantly shortened and the number of workers can be reduced.

[0012] Therefore, an object of the present invention is to solve the above-mentioned problems, and to construct a prefabricated trolley wire and a prefabricated trolley in which a suspension wire and a trolley wire whose lengths are adjusted to the distance between steel towers and a trolley wire are integrally installed at the same time. To provide the line.

[0013]

In order to achieve the above object, the present invention forms a prefabricated trolley wire having a hanger wire and a hanger attached to the trolley wire, which are cut out in accordance with the distance between the supporting columns. A prefabricated trolley wire was installed.

With the above structure, the prefabricated trolley wire is
Since the suspension wire and the hanger that are cut out in accordance with the intervals of the support columns are attached to the trolley wire, the prefabricated trolley wire is hung between the support pillars to complete the overhead wire immediately.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

First, FIG. 2 shows a prefabricated trolley wire according to the present invention. FIG. 2A is a partial side view of the prefabricated trolley wire. The prefabricated trolley wire 1 is provided in such a manner that the upper end portion of the hanger 3 is engaged with the hanger wire 2 cut out according to the distance between the support columns measured in advance, and the hanger 3 hangs down. A trolley wire 4 having a predetermined length is engaged with the lower end of the hanger 3, and the trolley wire 4 is held substantially horizontally. Although not shown in the drawing, the lifting tool wire 2 is provided at both ends of the lifting tool wire 2.
Is attached to the support column. In addition, the hanging wire 2 cut out according to the intervals between the support columns is arranged along the trolley wire 4 in that order. Although only one hanger 3 is shown, many hangers 3 are provided at intervals along the prefabricated trolley wire 1. Length of individual hanger 3 and each hanger 3
The installation interval is determined by assuming the completion of the overhead line.
Therefore, the distance between the hanging wire 2 and the trolley wire 4 is
Is gradually changing so that it becomes mountainous at both ends. FIG. 3 shows the prefabricated trolley wire 1 when the overhead wire is completed.

FIG. 2B is a cross sectional view of the prefabricated trolley wire 1. As shown in the figure, the trolley wire 4 has constrictions 5 continuous in the axial direction on both sides of the upper half, and the wire gripping portions 6 forming the lower end of the hanger 3 are engaged with both constrictions 5. . The electric wire gripping portion 6 is divided into two pieces along the trolley wire 4 at the top of the trolley wire 4, and the two pieces are fastened to each other by screws 7 or the like and grip both constrictions 5. The upper end of the hanger 3 is wrapped around the hanging wire 2.

The prefabricated trolley wire 1 is assembled in a factory or the like as shown in FIG. 2 and then wound on a drum. At this time, the hanger 3 is wound along the drum body. In addition, a strip-shaped spacer for preventing the entanglement of the anchor fittings and the hanger 3 is inserted between the prefabricated trolley wires 1 that are wound around and overlap each other.
Along with that, he is caught in a drum. When the prefabricated trolley wire 1 is assembled, the trolley wire 4 to which a tension load is applied for a predetermined time may be used. This is a process performed in advance to remove the amount of elongation due to creep after erection. For example, after applying a load of 2000 kg for 30 minutes, the trolley wire 4 and the hanger wire 2 are arranged side by side and the hanger 3 is attached.

Next, an overhead wire construction method using the prefabricated trolley wire 1 will be described. As shown in FIG. 1, a large number of supporting columns (not shown) such as steel towers are arranged along a line on which a trolley wire is installed, and rails 10 are laid along the supporting columns. There is. Above the rail 10, a working protective ground wire 11 is arranged in advance.
The prefabricated trolley wire 1 is wound around a drum 12. The drum 12 is a moving carriage 1 that moves on the rail 10.
It is mounted on No. 3 and is supported with the trunk lying down. The movable carriage 13 has a feed adjusting device 14 for feeding the prefabricated trolley wire 1 by a desired tension and a desired amount, and a spacer for collecting the spacer 15 discharged from the drum 12 when the prefabricated trolley wire 1 is fed. A collection drum 16 is provided. Further, the movable carriage 13 is provided with a wire winding device 17 for winding a wire, which will be described later.

The work carriage 18 is for working in a high place, has a scaffold of a predetermined height, is located behind the moving carriage 13 on the rail 10, and follows the movement of the moving carriage 13. Then you can move. A support 19 for supporting the prefabricated trolley wire 1 is integrally attached to each support column. Between the supports 19 that are being installed, the semi-car train 20 is attached to the front support 19 and the hanging wire gripping metal fitting 21 is provided so as to approach the rear support 19. Wire winding device 17 and lifting wire gripping metal fitting 21
A wire 22 is stretched between and via a semi-car train 20.

In FIG. 1, the section 1a of the prefabricated trolley wire 1 has already been extended, and the lifting wire 2 of the section 1a is attached to the lifting wire gripping metal fitting 21 at the front end of the lifting wire 2. Has been. Prefabricated trolley line 1 section 1b
Is currently being extended. In the lifting wire 2 of the section 1b, the retracting metal fitting at the rear end thereof is attached to the support 19. The prefabricated trolley wire 1 wound around the drum 12 is fed to the feed adjusting device 14 by the rotation of the drum 12, and at the same time, the spacer 15 is wound around the spacer collecting drum 16 and collected. Delivery adjusting device 14
At the end, the prefabricated trolley wire 1 with the lifting wire 2 facing up
Is erected. In this way, the prefabricated trolley wire 1
Is stretched over a line between the support 19 and the delivery adjusting device 14 with a predetermined tension.

On the other hand, the wire winding device 17 winds the wire 22 and applies tension to the wire 22. Wire 22
The direction of tension is changed in a substantially horizontal direction via the semi-metal wheel train 20 attached to the support 19, and the hanging wire gripping metal fitting 21 is pulled forward. Therefore, the lifting wire gripping metal fitting 21 rises toward the support 19, and the prefabricated trolley wire 1 in the section 1a in which the retracting metal fitting at the front end of the lifting wire gripping metal fitting 21 is attached increases tension. It is pulled up to a predetermined position. Pre-fabricated trolley wire 1 when tension is completed
Is fixed to the section 1a by hooking the detention metal fitting to the support 19. In this way, the tight line in the section 1a is achieved.

When the tensioning of the section 1a is completed, the wire winding device 17 is attached to the support 19 in the section one front of the section 1b, and the wire 22 is unwound at the same time. The lifting wire gripping metal fitting 21 at the tip of the wire 22 is attached to the retracting metal fitting at the front end of the section 1b. And mobile trolley 1
3 moves forward, the extension of the next section is started, and the tight line of section 1b is started. In this manner, the prefabricated trolley wire 1 is sequentially installed between the support columns while moving the movable carriage 13 and the work carriage 18.

[0024]

The present invention exhibits the following excellent effects.

(1) Since the work of tightening the wire after the drawing is performed only once, the work time is shortened.

(2) Since the number of workers required for the work is small, the labor cost is reduced.

(3) Since the prefabricated trolley wire is assembled in advance, it is possible to carry out the overhead line work according to the plan and reduce the error in the work.

(4) Since it is possible to remove the creep in advance, it is not necessary to remove the creep during the installation.
Therefore, the erection work time can be shortened.

[Brief description of the drawings]

FIG. 1 is an explanatory view of an overhead wire construction method showing an embodiment of the present invention.

FIG. 2 is a partial side view and a sectional view of a prefabricated trolley wire showing an embodiment of the present invention.

FIG. 3 is a side view showing an appearance of a prefabricated trolley wire installed according to an embodiment of the present invention.

FIG. 4 is an explanatory view of an overhead wire construction method showing a conventional example.

[Explanation of symbols]

 1 Prefabricated trolley wire 2 Lifting equipment wire 3 Hanger 4 Trolley wire 13 Mobile trolley

Claims (2)

[Claims] 1. A suspension wire is erected between a plurality of support columns such as steel towers, and when a trolley wire is suspended from the suspension wire via a hanger, the suspension wire is hung depending on the distance between the support columns. A prefabricated construction method of a trolley wire, characterized in that a prefabricated trolley wire is formed by attaching the cut out hanging wire and a hanger, and the prefabricated trolley wire is installed. 2. A trolley wire suspended by a hanger from a supporting pole such as a steel tower via a hanger and cut out in accordance with the distance between the trolley wire and the support pole measured in advance. A prefabricated trolley wire comprising: a hanging wire and a hanger that connects the trolley wire and the hanging wire.