JPH0697804B2 - Wire drawing method and its equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for extending a wire such as an overhead transmission / distribution line and a bypass cable for construction work, and an apparatus therefor.

(Prior Art) When extending an overhead transmission / distribution line, the messenger wire is stretched over each utility pole in the section where the messenger wire is extended, and a leading roller that holds the end of the wire to be extended from one end of the extension section is attached to the messenger. Place the wire on the wire, and hang the moving wagon with the electric wire on the messenger wire behind the leading roller in order.The leading roller and each moving wagon are connected by a connecting rope at regular intervals, and the tip of the leading roller is connected. Use the pull rope to extend the wire in the direction of the wire. At this time, the pulling rope is located almost on the extension line of the extending electric wire, and each mobile wagon stably moves on the messenger wire.
Further, the connecting rope simply connects the leading roller and each moving wagon at regular intervals, but after the leading roller, the connecting rope also serves as the pulling rope of each moving roller.

(Problems to be Solved by the Invention) However, in the above wire drawing method, when the wire is drawn by a pulling rope, a wrap angle is inevitably generated at each support portion of the messenger wire because the messenger wire is loosened. In addition, as shown in Fig. 14, the wrapping angle α reaches 60 ° to 70 ° in places where there is a difference in height of the tracks. Although illustration is omitted, at the place where the track bends at a right angle in the horizontal direction,
A 90 degree horizontal angle occurs.

Therefore, as shown in FIG. 14, the pulling rope that is pulled linearly in the extending direction and the connecting rope H between the moving rollers are the leading roller and the moving roller that run on the messenger wire M at the support S portion of the messenger wire M. R is pulled in the direction F different from the messenger wire M by θ °. Therefore, as shown in FIG. 15, the force F'of the leading roller or the moving roller R trying to run on the messenger wire M is reduced by cos θ, and F '= Fcos
θ, and the load W on the leading roller and the moving roller increases by cosβ, and W = M + Fcosβ (where M is the mass of the moving roller or the leading roller R, the electric wire or cable, the connecting rope, etc.). Therefore, the leading roller and the moving roller cannot pass through each of these supporting portions, or must pull the pulling rope with a considerably large tension, and there is a drawback that a smooth wire extension cannot be performed.

(Means for Solving the Problems) The present invention provides a method for smoothly passing through such a messenger wire supporter part and extending the wire without applying extra tension at the part, and a device used for this method. It is intended to solve the above problems by providing them.

In order to solve this problem, first, it is assumed that the pulling rope or the connecting rope is always pulled in parallel with the messenger wire.However, in the conventional wire drawing method, the pulling rope or the connecting rope is immediately made parallel with the messenger wire. You can't pull. Because the electric wire or cable that is going to be extended continues behind the pull rope,
The connecting rope is located under the leading roller and the moving roller.Because there is an electric wire or cable to be extended on the connecting rope, the connecting rope is not attached to the guide body such as the guide roller at each supporting portion of the messenger wire. You cannot pass through.

Therefore, according to the present invention, as shown in FIG. 1, the pulling rope and the connecting rope H are rotatably supported above the messenger wire M of the leading roller and the moving roller R, and the above-mentioned supporters S of the messenger wire M are used. The pulling rope and the connecting rope H are made to pass from the messenger wire M to the guide body at a constant interval, whereby the pulling rope and the connecting rope H are always made parallel to the messenger wire M.

The concrete configuration of the present invention is to stretch a messenger wire (which may be a messenger rope in some cases) over each electric pole or the like in the extending section, and suspend a large number of moving rollers in order at one end of the messenger wire. The lower portion of each moving roller supports the extending electric wire or cable at a constant interval, and the connecting rope or the pulling rope is attached to the rotating locking piece rotatably provided above the messenger wire roller of each moving roller. By fixing (hereinafter simply referred to as connecting rope) each moving roller is connected with the connecting rope or the like at regular intervals, and the connecting rope or the like is provided at regular intervals above the messenger at each support point of the messenger wire. In this method, the guide body is slidably supported and the connecting rope and the like are pulled in the extending direction.

During the wire drawing method, the leading traction roller is suspended on the messenger wire in front of the leading moving roller, the wire or cable end to be extended is fixed to the leading traction roller, and the connecting rope is connected to the leading wire. It may be fixed to the tow roller and the connecting rope may be pulled. This leading traction roller is provided with a horizontal plate rotatably supporting the central part on one side of the vertical frame, and a plurality of messenger wire rollers are rotatably supported on the horizontal plate. A rotatably locking piece for fixing the connecting rope etc. is rotatably provided on the upper part of the vertical frame, and the central part of the guide arm that is substantially perpendicular to the vertical frame is fixed to the vertical frame below the messenger wire roller. However, guide rollers are provided at both ends of the guide arm substantially in parallel with the messenger wire roller, and a support body for supporting an end portion of an extending electric wire or cable is provided at a lower portion of the vertical frame.

Further, in the above wire drawing method, the supporter for supporting the messenger wire is provided with a receiving metal fitting of a certain length which holds the messenger wire at the upper end portion at the lower part of the supporting base for supporting an appropriate object, and above the receiving metal fitting. A plurality of connecting rope guide rollers are provided at right angles to the longitudinal direction of the messenger wire, and a pair of vertical guide rollers are provided at both ends of the plurality of connecting rope guide rollers at intervals.

(Operation) When the connecting rope or the like is pulled in the above wire-drawing method, the upper part of each moving roller is pulled and the vertical frame is inclined, but a plurality of messenger wire rollers are rotatably supported by the vertical frame. Since it is pivotally supported by the horizontal plate,
Each roller does not come off the messenger wire. Further, the wire or cable to be extended is placed on and supported by each moving roller at regular intervals, and since each movable roller is supported by the connecting rope or the like at constant intervals, it extends according to the pulling of the connecting rope or the like. If an electric wire or cable is drawn out from one end of the wire extension section, it will be supported and extended by each moving roller.

The moving roller locks and fixes a connecting rope or the like on a rotary locking piece provided on the upper part, mounts the messenger wire roller on the messenger wire, and mounts an extended wire or cable on the lower part of the moving roller. When the connecting rope or the like is pulled according to the above-mentioned wire drawing method, the rotation locking piece rotates with respect to the vertical frame, and the vertical frame tilts. In accordance with this, the horizontal plate pivotally supporting the plurality of messenger wire rollers also rotates relative to the vertical frame, and each messenger wire roller remains on the messenger wire. In such a state, the moving roller is pulled on the messenger wire by the connecting rope and moves.

Further, the leading pulling roller supports the end portion of the electric wire or cable on the lower support of itself, and locks and fixes the connecting rope etc. on the upper rotation locking piece, and fixes the messenger wire roller to the messenger wire. Put. Then, when the connecting rope or the like is pulled according to the above-mentioned wire drawing method, the rotation locking piece relatively rotates with respect to the vertical frame, and the vertical frame is inclined. In accordance with this, the horizontal plate pivotally supporting the plurality of messenger wire rollers also rotates relative to the vertical frame, and each messenger wire roller remains on the messenger wire. Further, the guide arm also tilts as the vertical frame tilts, the guide roller at one end of the guide arm presses against the lower surface of the messenger wire, and the messenger wire is held by the messenger wire roller and this guide roller. As described above, the vertical frame is prevented from tilting. In this state, the moving roller is pulled by the connecting rope and moves on the messenger wire.

The messenger wire supporter is a supporter that supports the messenger wires at regular intervals in the wire drawing method, and the messenger wires are supported by the metal fittings protruding from the lower part of the support base. When the moving roller or the leading traction roller passes through this support, the messenger wire roller passes over the receiving metal fitting, and the connecting rope and the rotation locking piece pass over the plurality of connecting rope guide rollers above the receiving metal fitting. Rotate those rollers and pass them.
Even when the moving roller or the leading pulling roller does not pass, the connecting rope, etc. passes over the connecting rope guide roller, and the connecting rope etc. is always kept at a position above the messenger wire at a certain interval, and is always in the same direction as the messenger wire. There is no unnecessary increase in tension because it is pulled by.

Embodiment An embodiment of the present invention will be described below with reference to the drawings.

First, the moving roller A used in the wire drawing method of the present invention is
FIG. 4 to FIG. 4 will be described. A shaft 2 is projectingly provided on one side in the middle of a vertical frame 1 having a U-shaped cross section.
The rollers 4 and 4 for messenger wires are axially supported on both sides of the horizontal plate 3 whose central portion is axially supported. Vertical frame 1
An arm 5 is provided at a lower end of the arm 5 so as to be substantially parallel to the shaft 2. Further, the upper end of the opening / closing door 11 is pivotally supported at the tip of the shaft 2, and a pin 13 protruding from the tip of the arm 5 is interposed between two movable locking pieces 12, 12 protruding from the lower surface of the opening / closing door 11. is doing. When one of the pressing plates 14, 14 projecting forward and backward is pressed, the opening / closing door 11 is linked with one of the two movable locking pieces 12, 12 protruding from the lower surface of the opening / closing door 11 to open and close the opening / closing door 11. Enter inside 11, unlock the door 11
When the pressing plate 14 is further pressed, the opening / closing door follows the force.
11 rotates around the shaft 2 and opens. A pin 15 projects from one side of the upper portion of the vertical frame 1, and a rotary locking piece 16 is rotatably supported at the tip of the pin 15 above the messenger wire rollers 4 and 4. The rotation locking piece 16 has two plates superposed on each other, a gripping groove 17 for a connecting rope is formed at the lower end, and a tightening screw 18 is screwed to the two plates. A hook 19 is provided on the lower surface of the arm 5, and a wire 20 having one end locked to the hook 19 has both ends of a V-shaped shaft 22 fixed to both ends of an arc-shaped frame 21. Two rollers 2 on each side of the V-shaped shaft 22
Roller 24 for supporting electric wires or cables consisting of 3 and 23 pivotally supported
Is hung.

Next, the leading traction roller B will be described with reference to FIG.
A shaft 31 is projectingly provided on one side in the middle of the vertical frame 30, and messenger wire rollers 33, 33 are pivotally supported on both sides of a horizontal plate 32 whose central portion is pivotally supported by the shaft 31. A central portion of a guide arm 34 is fixed to the lower end of the vertical frame 30 at a right angle to the vertical frame 30. At both ends of the guide arm 34, the messenger wire rollers 33, 33 are provided.
The guide rollers 35, 35 are axially supported below and in the same direction. An electric wire or cable support 36 is suspended at the lower end of the vertical frame 30. Further above vertical frame 30
A shaft 37 is projectingly provided on one side of the upper part of the messenger wire, and a central portion of a rotary locking piece 38 is pivotally supported on the shaft 37 above the messenger wire rollers 33, 33. Hooks 40 and 40 are loosely inserted into the holes 39 and 39, respectively.

Further, the messenger wire support device C will be described with reference to FIGS. 6 and 7.
Is provided, and at the tip of the projecting arm 42, a receiving metal fitting 43 is provided, in which two plate pieces are overlapped and fixed with bolts and nuts, and the upper end of the receiving metal fitting 43 has a semicircular cross section. A messenger wire insertion hole 44 is provided in the longitudinal direction. A projecting arm 45 is projectingly provided on the upper part of the support base, and a frame body 46 having a channel groove cross section is fixed to the tip of the projecting arm 45 so as to be located above the receiving metal fitting 43 along the receiving metal fitting 43.
Several connecting rope guide rollers 47 are rotatably provided at right angles to the longitudinal direction along the lower edge of the 46, and a pair of connecting rope guide rollers 47 are provided at the front and rear ends of the frame body 46 at positions located on both sides of each connecting rope guide roller 47. The vertical guide rollers 48, 48 are provided. Further, a support body 49 is provided on the side of the support base 41 opposite to the protruding side of the projecting arms 42 and 45, and the support body 49 is attached to a support metal fitting 50 having one end supported by an appropriate structure so that the inclination can be adjusted. .

Next, the wire drawing method of the present invention will be described using the above-mentioned members.

First, as shown in Fig. 8, each utility pole 60 in the section to be extended.
Stretch messenger wire 61 over. The messenger wire 61 is inserted into the messenger wire insertion hole 44 of the receiving member 43 of the messenger wire support C supported on each telephone pole 60 to support it. A cable feeding drum 62 is provided at one end of the messenger wire 61, that is, one end of the extended wire section, and the messenger wire roller 33 of the leading traction roller B is attached to one end of the messenger wire 61 as shown in FIG. The roller B is suspended, and one end of the cable 63 fed from the cable feeding drum 62 is supported and fixed to the electric wire or cable support 36 of the leading traction roller B. Then, the hook 40 at the front end of the rotary locking piece 38 on the upper part of the leading traction roller B is
One end of the extended wire rope 64 is locked to, and the other end of the extended wire rope 64 is placed between the two vertical guide rollers 48 of the messenger wire support C of each utility pole 60 and on each of the plurality of connecting rope guide rollers 47. And fixed to a winch 66 of a work vehicle 65 provided at the other end of the extended wire section. A retaining tool C'having substantially the same structure as the messenger wire support C is used for the electric pole 60 at one end on the cable feeding side, but the messenger wire support C is used for the electric pole 60 at the other end on the wire extension side. Instead, the wire rope 64 is passed through the introduction roller 67, and the messenger wire is retained below the messenger wire. Then, the rotation locking piece 38 on the upper part of the leading traction roller B is
One end of the connecting rope 68 is locked to the hook 40 at the rear end, and a large number of moving rollers A are locked and fixed at regular intervals of the connecting rope 68. This is a movable locking piece above the moving roller A.
Insert the connecting rope 68 into the holding groove 17 of 16 and tighten the two plates of the movable locking piece 16 with the screw 18 to connect the connecting rope 68.
Fixed to. When the winch 66 is driven and the wire rope 64 is pulled, the leading pulling roller B is suspended from the messenger wire 61 and moves. When the connecting rope 68 extends, the messenger wire rollers 4 and 4 of the moving rollers A are sequentially placed on the messenger wire 61 on the cable feeding side, and the cable 63 is placed on the electric wire or the cable supporting roller 24. In this way, as the wire rope 64 and the connecting rope 68 are pulled, the cable 63 is sequentially fed out, and a large number of moving rollers A are suspended on the messenger wire 61, and the cable 63 is fixed to the moving rollers A. It is placed at intervals and the wire is extended in this state.

In Figure 9, the leading traction roller B is messenger wire 61.
It shows a state of moving up, the upper part of the rotation locking piece 38 is pulled by the wire rope 64, the vertical frame 30 is inclined, but the horizontal plate 32 is rotatable with respect to the vertical frame 30 Rollers 33, 33 are messenger wires 61
Can't come off the top. Moreover, the guide arm 34 fixed to the lower portion of the vertical frame 30 at a substantially right angle causes one end of the guide arm 34 to go up due to the above inclination of the vertical frame 30, and the guide roller 35 contacts the lower surface of the messenger wire 61. As a result, the vertical frame 30 does not incline any more, and stably runs on the messenger wire 61.

10 and 11 are a front view and a partial cross-sectional side view showing a state in which the moving roller A passes through the messenger wire support C.
16 passes with the connecting rope 68 between the two longitudinal guide rollers 48, 48 at the top of the messenger wire support C and over several connecting rope guide rollers. Further, the messenger wire rollers 4 and 4 pass over the receiving fitting 43. When the moving roller A passes through the messenger wire support C, the opening / closing door 11 provided between the tip of the shaft 2 of the moving roller A and the tip of the arm 5 has a pressing plate 14 on the front side thereof as shown in FIG. Hits the projecting arm 42 of the support C, and the pressing plate 14 is pushed, whereby the movable locking piece 12 of the opening / closing door 11 is pulled into the opening / closing door 11, and is disengaged from the pin 13 at the tip of the arm 5.
The lock is released, and the opening / closing door 11 is further pushed by the protruding arm 42 to rotate about the shaft 2 and goes over the protruding arm 42. Then, after the arm 42 is crossed, the opening / closing door 11 is moved to the shaft 2 by its own weight.
The movable locking piece 12 protrudes from the lower surface of the opening / closing door 11 by the force of the spring and is locked to the pin 13 by rotating about. Then, the opening / closing door 11 is locked again in the closed state. In this way, the moving roller A is a messenger wire support C
Pass through.

If the cable 63 is a bypass cable for construction after the cable 63 is extended from one end to the other end of the extension section, it is used in this state, otherwise, the leading traction roller B,
The moving roller A etc. are removed. Further, in the case of a bypass cable, after the construction is completed, the end of the connecting rope 68 is locked to a winch or the like of the work vehicle on the cable feeding side, the winch is driven to wind up the connecting rope 68, and a large number of moving rollers A and The leading pulling roller B is pulled to the cable feeding side, and the cable 63 is also pulled together with the cable feeding drum.
Wrap it around 62. In order to pull the connecting rope like this,
No tension is applied to the cable 63 when recovering the cable.

In the above description, the number of cables 63 to be extended is one, but in reality it is three-phase, that is, three cables as shown in FIG.
63 is extended all at once. In that case, the structure of the succeeding leading traction roller B does not have the guide arm 34 and the guide roller 35 which are slightly different from those of the leading structure.

Fig. 12 and Fig. 13 show an example of using this wire extension method for the ground wire replacement method.
70 is used as a messenger wire, and the ground wire A and the leading traction roller B are placed on this. Then, the wire is extended in the same manner as in the above embodiment, the new wire 71 of the ground wire is extended to the end, and then the new wire 71 is temporarily raised. At this time, the new wire 71 pulls up the electric wire of each ground wire A or the roller 24 for supporting the cable, but the vertical frame 1
Since the electric wire or the cable supporting roller 24 is connected by the wire 20, it can be lifted freely. And thirteenth
As shown in the figure, the connecting rope 68 is pulled from the end to bring a large number of moving rollers A to the end, and sequentially removed from the old line 70 which is a messenger wire and collected. After that, the new line 71 is used as a messenger wire and the old line 70 is pulled out.

Although the cable end portion is placed and fixed on the leading traction roller in the above embodiment, the end portion of the electric wire or cable may be placed and fixed on the leading moving roller A without providing the leading traction roller B. Further, in the above embodiment, the wire rope 64 and the connecting rope 68 are separated, but this is an integrated connecting rope,
This connecting rope may be towed as an extended rope. Further, the moving roller A, the leading traction roller B, and the messenger wire support C are not limited to the structure of the above embodiment.

(Effects of the Invention) The present invention has the above-described structure. In the wire drawing method of claim 1, the connecting rope or the like is always supported on the guide body by supporting the connecting rope or the like at each supporting portion of the messenger wire. Since it is maintained parallel to the messenger wire, the connecting rope is pulled in the same direction as the messenger wire, and each moving roller can smoothly pass through each support part of these messenger wires, and the extension tension of the wire or cable is small. . Also, the wire or cable to be extended is supported by the lower part of each moving roller, but by connecting a connecting rope or the like to the rotation locking piece on the upper part of each moving roller that is different from this electric wire or cable supporting point, this connecting Since a rope or the like is pulled as a wire-drawing rope, almost no wire-drawing tension is applied to the wire or cable to be drawn. Therefore, the wire drawing tension can be small and the device can be simple.

Further, in the leading pulling roller according to claim 2, the connecting rope and the like are locked to the upper rotary locking piece in the wire drawing method.
The upper part of the vertical frame is pulled forward to rotate and tilt when the connecting rope is pulled when the wire is extended, but the horizontal plate that pivotally supports the rotation locking piece and the messenger wire roller is extended in the extending direction. It follows and turns, and it can run stably without coming off from the messenger wire. In addition, the leading traction roller is provided with a guide arm protruding from the lower part of the vertical frame at a substantially right angle to the vertical frame in the front-rear direction according to the inclination of the vertical frame when the wire is extended, and guides the guide arm tip to the lower surface of the messenger wire. The roller hits
The vertical frame can only tilt to a certain degree. Therefore, it is possible to travel on the messenger wire more stably.

Further, the messenger wire supporter according to claim 3 holds the messenger wire below, and the connection rope guide roller for guiding the connection rope or the pulling rope is provided above the messenger wire supporter. Therefore, each messenger wire supporter is attached to each utility pole. Once installed, the connecting or pulling rope will always be pulled above the messenger wire,
The wire drawing is done smoothly.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention, FIG. 1 is a schematic configuration diagram of the method of the present invention, FIG. 2 is a front view of a moving roller used in the wire drawing method of the present invention, and FIG. Side view,
4 is a partial sectional front view of the moving roller, FIG. 5 is a side view of the leading pulling roller of the present invention, FIG. 6 is a front view of the messenger wire supporter of the present invention, and FIG. 7 is the same messenger wire. Partial cross-sectional side view of the supporter, FIG. 8 is a side view showing the wire drawing method of the present invention, FIG. 9 is a side view showing the wire drawing state of the leading traction roller of the present invention, and FIG. FIG. 11 is a front view showing a state in which the moving roller passes through the messenger wire support device, FIG. 11 is a sectional side view of the same portion, and FIGS. 12 and 13 are side views showing other embodiments of the wire drawing method of the present invention. Figure, Figure 14 is a schematic view showing the state of the height difference in the conventional wire drawing method, Figure 15 is the 14
It is explanatory drawing which shows the force relationship of a leading roller or a moving roller, and a pulling rope etc. in the figure. In the figure, A is a moving roller, B is a leading pulling roller, C is a messenger wire supporter, 1 is a vertical frame, 2 is a shaft, 3 is a horizontal plate, 4 is a messenger wire roller, 5 is an arm, and 16 is a movable member. Stopper 24, electric wire or cable supporting roller, 30 vertical frame, 31 shaft, 32 horizontal plate, 33 messenger wire roller, 34 guide arm, 35 guide roller, 36 electric wire or cable support , 38 is a rotation locking piece, 40 is a hook, 41 is a support base, 42
Is a protruding arm, 43 is a receiving member, 44 is a messenger wire insertion hole, 47 is a connecting rope guide roller, 60 is a utility pole, 61 is a messenger wire, 63 is a cable, 64 is an extended rope, 66 is a winch, and 68 is a connecting rope. Is.

Claims (3)

[Claims] 1. A messenger wire is stretched over each utility pole or the like in a section where the wire is extended, a large number of moving rollers are suspended in order from one end of the messenger wire, and an electric wire or cable is extended below the moving rollers. Is supported at a fixed interval, and the connecting rope is fixed to a rotating locking piece rotatably provided above the messenger wire roller of each moving roller, and the moving rollers are connected at a fixed interval by the connecting rope. The connecting rope is slidably supported by a guide body provided at a fixed distance above the messenger wire at each support portion of the messenger wire, and the connecting rope is pulled in the extending direction. . 2. A lateral plate having a central portion rotatably rotatably supported on one side of a vertical frame, and a plurality of messenger wire rollers are rotatably supported on the lateral plate. Above the messenger wire rollers. A pivotal locking piece for fixing the connecting rope is rotatably provided on the upper part of the vertical frame, and the central portion of the guide arm that is substantially perpendicular to the vertical frame is fixed to the vertical frame below the messenger wire roller, A guide roller is provided at both ends of the guide arm substantially parallel to the messenger wire roller, and a support for supporting an end portion of an extending electric wire or cable is provided at a lower portion of the vertical frame. Tow roller. 3. A supporting metal fitting having a messenger wire gripped at its upper end is projectingly provided on the lower part of a supporting base for supporting an appropriate object, and above the receiving metal fitting, at a right angle to the longitudinal direction of the messenger wire. A messenger wire supporter, characterized in that a connecting rope guide roller is provided on the, and a plurality of connecting rope guide rollers are provided along the messenger wire.