JP2625784B2 - Non-inverted suspension wheel and wire drawing method using it - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an improvement of a wire drawing method using a non-inverted suspension wheel, which has attracted attention in the field as a low tension wire drawing method.

[Prior art and problems] A wire drawing method of drawing an overhead power transmission line using a non-reversing type suspension wheel 10 'as shown in FIG. 8 is disclosed in Japanese Patent Publication No. 57-50402 previously proposed by the applicant. Discloses its basic configuration in detail.

That is, the non-inverting type hanging wheel 10 'is constituted by the frame 7 which forms the spaces 3 and 6 between the upper rollers 1, 4 and the lower rollers 2, 5, respectively. It is configured such that the striatum can freely move between the lower roller 4 and the lower roller 2 or 5.

To extend line wires using a non-inverting type Tsukin wheel 10 'as described above, as shown in FIG. 6, the support wire 20 is stretched between the tower T ₁ and T _2, the support wire A plurality of these non-inverted type suspension wheels 10 'are connected by a spacing wire 11 so that one upper roller of the suspension wheel 10' is run on 20 and developed on the support line 20 by, for example, a self-propelled machine. Let me know. Upon this expansion, on one of the lower rollers on the go feeding the pull wire 21, Tsukinsha 10 ', 10' are suspended, as shown in FIG. 7 in a state of being deployed between tower T ₁ and T ₂ The upper roller of one frame of the wheel & pinion 10 'is formed on the support line 20, and the pull wire 21 is formed on the lower roller of the other frame.

Tsukin wheel 10 as described above ', 10' is expanded between tower T _1, T _2, connecting the wire 30 to an end of the pull wire 21 When pull wire 21 is Nobesen, in Figure 6 while taking over the pull wire 21 from the iron tower T ₂ side towers T ₁ side as shown, each Tsukin vehicles
The wire 30 is exchanged on the lower roller of 10 ', 10'. 8th
The figure shows a situation in which the pull wire 21 of FIG. In this state, a tension is then applied to the electric wire 30 to move the electric wire 30 from the lower roller 2 to the upper roller 1 as shown by an arrow in the figure, while loosening the tension of the support wire 20 and lowering the lower wire from the upper roller 4. Move to the side roller 5. In this way, the wire 30 is used in place of the previous support wire 20 and the tension-free support wire is used.
When the wire 20 is collected on the lower roller 5 and the lifter wheels 10 ', 10' are collected by using the stretched electric wire 30 as a support wire, only the electric wire 30 remains and the extension of the electric wire is completed.
As described above, the tension of the striated body is added or released by using the spaces 3 and 6, and the suspension wheel 10 'is removed from the non-reversing suspension wheel from a place where it is not necessary to perform the upside down operation of the suspension wheel 10' itself. Called a car, it has become the mainstream of low tension wire drawing in today's power line drawing method. The utility of this method is highly evaluated particularly in the case of using a conventional wire drawing method for drawing large-sized electric wires, which are subject to a large wire tension, or for long-diameter wires such as crossing a strait.

However, as can be seen from the above description, the hanging wheels 10 ', 1
The development of 0 'is performed only in the span of one steel tower, and it has not been possible to develop it at a stretch over several spans of the steel tower. For this reason, when attempting to extend electric wires over several spans, the required number of suspension wheels 10 ', 10' must be carried in for each span of each tower, and separately suspended for each span of the tower. After deploying the cars 10 ', 10', the pull wire 21 is connected or replaced with a long object, and the pull wire is used to perform wire replacement between the plurality of tower diameters. Was.

However, as described above, it is troublesome to carry out the unfolding work of the lifting wheel 10 'in all the spans of the respective towers.
In addition, depending on the terrain, there may be a span that hinders deployment, such as difficulty in carrying a lift truck. Therefore, if the main wire drawing work is performed in the drum field and the engine field as in the conventional wire drawing method, it becomes possible to unfold the wire of the suspension wheel from the drum field or the engine field at a stretch over several diameters, The application range of the low tension wire drawing method using the non-inverted suspension wheel will be dramatically expanded.

Furthermore, in the extending direction described above, it is necessary to first extend the pulling wire, and the work of replacing the pulling wire with the electric wire is performed.
Although the wire drawing tension is much smaller than the conventional wire drawing method, there is a problem in that the wires pass over the rollers of a large number of suspension wheels over several spans, and the surface damage of the wires is therefore reduced. There is no danger. Therefore, as described above, if the hanging wheel can be deployed at a stretch from the drum field to the engine field, for example, when the lifting wheel is deployed, the pull wire is extended as described above. Instead, it is also possible to directly extend the electric wire, and the aforementioned risk of surface damage of the electric wire is completely solved.

[Object of the Invention] The present invention has been made in view of the above circumstances, and has an improved non-reversing type hanging metal which does not have a drawback that it cannot pass through a steel tower portion like a conventional hanging wheel. Using a car,
In addition, a guide roll suitable for the suspension wheel is disposed on a steel tower portion, thereby providing an overhead wire drawing method in which the deployment of the suspension wheel can be performed at a stretch between several wire diameters. Is what you do.

[Summary of the Invention] That is, the present invention uses a hanging wheel having an openable and closable portion in the extending direction of a linear body extended to a part of the frame of the hanging wheel, and such a hanging wheel is used. In the steel tower part, a plurality of metal wheels are deployed and the openable portion of the frame is opened to allow the vehicle to freely pass and run, so that the hanging wheel can be deployed at a stretch over a plurality of spans, and before and after the support roller of the steel tower. A guide roller is provided to prevent slack of the extended linear body in the vicinity of the support roller, thereby eliminating troublesome work such as loading and unloading of a lifting wheel between each steel tower diameter. This makes it possible to easily extend the overhead line by working in the main drum site and the engine site.

[Examples] Hereinafter, the present invention will be described based on examples.

FIG. 1 is an explanatory view showing one embodiment of a hanging wheel 10 used in the present invention, and the same reference numerals as those in FIG. 8 denote the same components.

In the hanging wheel 10 used in the present invention, an opening / closing piece 8 is provided on a part of the frame 7 so as to be openable and closable in the extending direction of the electric wire. The piece 8 constitutes a part of the frame 7, but when passing through the tower portion, it opens in the extension direction as shown in the side view in FIG. Is formed.

FIG. 3 shows the hanging wheels 10, 1 used in the present invention as described above.
FIG. 4 is an explanatory diagram showing a state where an electric wire 30 is extended using 0. First, the support wire 20 is stretched between the extending wire diameters, which is the same as the conventional example.

In the present invention, the pull rope is parallel to the support 20.
23 is extended first. The extension of the pulling rope 23 causes the plurality of single wheel wheels 22, 22 to travel and deploy on the support line 20, and at the same time, pulls the pulling rope 23 as shown in FIG.
It is thought that it is appropriate to extend the pulling rope 23 under the 22, 22 below, but when using a guide roller 27 described later, this guide roller is used, and the conventional drawing method is used. It is also possible to extend the line by fulfilling the same role as a steel tower car.

When the pull rope 23 is extended between the drum field and the engine field as described above, the hanging wheel 10 according to the present invention is connected to the end of the pull rope 23. Regarding this connection method, it may be connected to a part of the frame of the hanging wheel 10, or may be connected to the distance maintaining wire 11 and the pulling rope 23 or may be connected by an appropriate method. .

After connecting the pull rope 23 and the suspension wheel 10 as described above, the suspension wheels 10 and 10 necessary for extending
1, and the pulling ropes 23 are taken up on the engine field side, whereby the hanging wheels 10, 10 are successively developed on the support lines 20 as shown in FIG.

In the development of the hanger wheels 10, 10, in the conventional method described above, the pull wire 21 is extended on the lower roller of the hanger wheel and extended, but in the present invention, as shown in FIG. Wire 30 on the lower roller of
Should be directly extended. The electric wire 30 must be fixed in some form at the foremost part of the lifting wheel 10 to be deployed, but this fixing means is directly fixed to the frame, connected with an auxiliary wire for connection, and connected to the auxiliary wire. An appropriate method such as connecting the pulling rope 23 may be used.

As described above, the lifting wheels 10, 10 are deployed and the lifting wheels 10
When the vehicle reaches the support roller 25 of the tower T, since the conventional suspension wheel cannot pass through such a support roller 25, the individual suspension wheel for each tower diameter has been developed. However, as described above, the hanging wheel used in the present invention has the opening / closing portion 8 which can be opened / closed in the direction in which the electric wire extends, and thus automatically passes through the support roller. You can do it.

FIG. 4 is an explanatory view showing a state where the hanging wheel 10 is about to pass the support roller 25. Support roller 25
Is attached to the tower arm by the support frame 24.
The support arm 24 pushes and opens the opening / closing part 8 of the hanging wheel 10 when passing through, so that the hanging wheel 10 can pass over the supporting roller 25 smoothly. After the lifting wheel 10 has passed through the support rollers 25, the opening / closing section 8
Automatically closes to its original state and again forms part of the frame. The opening / closing section 8 may be provided with a spring bias necessary for opening / closing.

In FIG. 4, reference numeral 26 denotes a hanging wheel 10
Is a fall-off prevention bracket for pressing the side surface of the roller so that the upper roller running in a cantilevered state when passing through the roller does not come off.

As described above, the lifting wheels 10, 10 automatically pass through the supporting rollers 25 of the tower T automatically in sequence, and even if the span of the extending wire extends over a plurality of spans of the tower, individual lifting at the intermediate tower is performed. Can be deployed at a stroke without having to deploy the suspension wheel, and it is possible to simultaneously extend the electric wire 30 on the lower roller when the suspension wheels 10, 10 are deployed. Thus, it is possible to omit the operation of exchanging electric wires on a large number of hanging wheels 10, 10 as in the related art.

On the other hand, in FIG. 3, reference numeral 27 denotes a guide roller disposed before and after the support roller 25. For example, a vertical roller 27a and a horizontal roller 27b are mounted on a rectangular frame as shown in FIG. The lifting wheel 10 is configured to pass through the inside of the frame. In consideration of the case where this is set as an extended line, for example, a part of the vertical roller 27a is
Conveniently, it can be opened and closed as shown in the figure.

However, this guide roller 27 is intended to prevent the unfixed electric wire 30 from being drawn in the vicinity of the support roller 25 of the steel tower and may hang down. It is good and is not limited to the configuration shown in FIG.

In addition, in the above-described embodiment, in order to maximize the feature of the present invention that the hanger wheel is deployed between the drum field and the engine field at a stretch, the deployment of the hanger wheel is replaced with a conventional pulling wire. Although the case where the wire is directly extended at the same time is shown, if necessary, it is possible to draw out the wire first and draw the wire as before, and then replace the wire with the wire as before. Can be selected according to

Furthermore, since the support frame 24 and the support rollers 25 are manufactured in a structure that can be adapted to the configuration of the openable / closable portion of the hanging wheel 10 used in the present invention, the support frame 24 and the support rollers 25 have properties that should be attached to the tower arm. It should be designed optimally according to the configuration of the hanging truck 10, and it is a matter of course that the configuration is not limited to the configuration of the above-described embodiment. The present invention can be applied to a wheel frame as well as a single frame instead of the double frame shown in the embodiment.

[Effects of the Invention] As described above, according to the wire drawing method of the present invention, a non-inverted suspension wheel having an opening / closing part that can be opened and closed in the direction of extension of a linear body to be drawn is used, and a steel tower is used. A guide roller through which the hanger wheel can pass is provided before and after the supporting roller of the above, so that the wire can be extended. It is possible to deploy a row of suspension trucks in a single operation across the site, thereby eliminating the complicated work such as loading and deploying each suspension tower that was considered to be fatal conventionally. Not only that, it is also possible to simultaneously carry out the extension of the hanging wheel and the extension of the linear body extended such as the electric wire over a plurality of spans, and the extended line such as the electric wire. On the rollers of the lifting wheel The present invention has a great effect on the industry in the future, including the significance that the possibility of surface damage easily caused by the above can be eliminated.

[Brief description of the drawings]

FIG. 1 is an explanatory front view showing the structure of a hanging wheel used in the wire drawing method of the present invention, FIG. 2 is an explanatory side view thereof, and FIG. FIG. 4 is an explanatory view showing a hanging wheel passing through a support roller of a steel tower, FIG. 5 is an explanatory view showing an example of a guide roller, and FIGS. It is explanatory drawing which shows the extending | stretching state by the hanging wheel. 1,4: Upper roller, 2,5: Lower roller, 3,6: Space, 7: Frame, 8: Opening / closing piece, 10: Hanging wheel, 11: Spacing wire, 20: Support wire, 23: Pull rope, 25: support roller, 27: guide roller, 30: electric wire.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-56-117513 (JP, A) JP-A-57-151208 (JP, A) JP-A-59-148505 (JP, A) 54511 (JP, U)

Claims (1)

(57) [Claims] 1. A support wire is stretched between the extending diameters of an overhead wire and a pulling rope is extended in parallel with the supporting wire, and a non-inverting type suspension is provided at an extending end of the pulling rope. A lower roller of the non-inverted suspension wheel to be deployed, while a plurality of non-inverted suspension wheels are connected to each other by a spacing wire, and the plurality of non-inverted suspension wheels are deployed on a support line while being picked up by the pulling rope. A wire drawing method using a non-reversing type suspension wheel that draws out a separate linear body on the upper side, wherein the non-reversing type suspension wheel is disposed between an upper roller and a lower roller. Is provided in a part of a frame formed in a space in which the wire can be freely moved, and an opening / closing part that can be opened and closed in the direction of extension of the extended linear body is provided to support a steel tower of the hanging wheel. When the roller passes, the opening and closing portion is opened to allow the vehicle to run continuously, and the supporting roller of the steel tower is A guide roller having a configuration in which a roller is attached to a square frame large enough to allow the hanging wheel to pass before and after is provided to prevent the extended linear body from hanging down. Wire drawing method using a non-reversing type suspension wheel.