JPH0685604B2 - Conveyance wire extension method - Google Patents

Description

Description: [Industrial field of application] The present invention relates to a transporting and wire-drawing method for transporting and wire-drawing an electric wire by a carrier.

The term "rope" used in this specification includes both fiber ropes and wire ropes. Also,
The term “electric wire” includes not only a normal power transmission line but also a communication cable such as an optical fiber cable, or an optical fiber composite overhead ground wire, that is, an OPGW having a built-in optical fiber cable.

[Problems to be Solved by Prior Art and Invention]

Since the wire-carrying method is for carrying and carrying electric wires with a carrier, it has many advantages as follows.

(A) The wire is not subjected to tension such as wire tension and rotation during the wire drawing, and there is no phenomenon that the wire is damaged by sand dust, iron powder or the like adhering to the gold wheel, so that the wire can be drawn with high quality.

Since the wire drawing tension of (b) is not applied and the electric wire does not rotate much, the expansion of the electric wire during the wire drawing is extremely small, and it is possible to improve the quality and facilitate the wire tightening work for multiple conductors.

(C) Since the detention clamp can be pre-compressed, the construction period can be shortened.

(D) Since the bending force is not applied to the tension clamp during the wire drawing, the protector for the tension clamp is unnecessary. That is, the work of mounting the protector on the drum and removing the protector on the steel tower are not required, so that the work can be rationalized and the construction period can be shortened.

(E) It is not necessary to extend the wire pulling rope. In particular,
The work can be greatly streamlined in that it eliminates the need for an artisan work such as line crossing and rearrangement for extending the pulling rope.

These merits are, of course, utilized in the extension of general electric power lines, but pre-fabricated extended wire that is most disliked by the extension of the electric wire due to the extension wire tension because it can be performed with almost no extension wire tension applied to the electric wire. In addition, the UHV (1 million volt transmission) prefabricated wire, which has bad location conditions compared to conventional ones, is difficult to apply the drawing method, and requires higher reliability than ordinary ones, or It is most effective for wire drawing of OPGW, which requires more stringent conditions for tension and rotation.

On the other hand, there are cases where the wire-conveying method has disadvantages or the advantages described above cannot be obtained.

That is, in addition to the intermediate support corresponding to the gold wheel in the drawing method, a large amount of a relatively expensive carrier is required, and the cost is increased accordingly, and the work of collecting the carrier is added, and this carrier collecting work is added to all. In that case, the above-mentioned factors for shortening the construction period will be canceled, and as a result, the merit of shortening the construction period will not be obtained, or in steep mountainous areas, the entire steep weight of the wire will be applied in the pulling direction of the wire due to the long steep slope. Therefore, a considerable amount of tension is generated especially on the front end side of the electric wire, which may not necessarily result in a low tension wire extension.

As a conventional example of such a wire-conveying method, for example, transmission line construction materials No. 33 (Transmission Line Construction Technology Research Group; 1987)
There is a construction method as shown on pages 61 to 131 of December).

However, this conventional method was developed to extend the OPGW, and the demerits as described above have not been fully considered. It is not possible to make full use of the above-mentioned merits of the transport wire-drawing method.

In addition, this technology is designed to separate and juxtapose the support rope and the tow rope vertically.
For example, when the support rope and the tow rope are mixed, that is, the tow rope, which should have been separated from the support rope at regular intervals, floats up and comes into contact with the support rope in response to changes in the load and tension balance applied to each rope. Occurrence of the phenomenon of crossing or crossing is inevitable.
If this contact occurs, the passability of the carrier with respect to the intermediate support deteriorates, or the carrier reverses during transportation, which may cause unexpected trouble or delay in the wire drawing work. is there.

Therefore, in the present invention, the advantage of the wire-conveying wire construction method, that is, the merit that the quality is high and the construction period can be shortened, is maximized, and the wire-conveying wire-drawing method is provided to compensate for the cost increase due to the increase in the equipment. It is the one to be provided.

[Means and Actions for Solving the Problems]

Specifically, when the electric wire is conveyed and extended by a carrier that is pulled by a tow rope in the shape of a string of beads and travels on a support rope, the electric wire that is cut in advance to a length corresponding to the tight line section is When each of the wires is held by the terminal carrier and the intermediate part is carried by the plurality of intermediate carriers, the wires are independently conveyed with appropriate intervals between the wires, and when the wires reach the corresponding tight wire section. , After disconnecting the carrier for both terminals, the carrier is inverted by pulling up the electric wire, and the carrying state of the carrier is automatically opened by opening the door of the carrier by utilizing the inverted state of this carrier, and While moving the electric wire released from the intermediate carrier to the corresponding tower arm to temporarily raise or tighten the wire, collect the empty carrier by winding the tow rope and collect the next electric wire in the corresponding tight wire section. To reach The same work as the previous wire for wire, to provide the transport extending line method comprising as repeated until extension line is complete for the entire extended line section similar tasks for each wire that follows further below.

One of the features of this wire-conveying method is that the electric wires are transferred independently, that is, the electric wires are transferred in a divided manner, and the wires that have reached the corresponding tightening line section are temporarily raised or tightened. The point is that the electric wires are conveyed in parallel and the carrying device is collected in parallel. In other words, by carrying out the temporary raising or tightening line and the subsequent transportation of the electric wire and the collecting of the carrying device in parallel, not only the carrying device collecting work can be prevented from increasing the work period, but also the temporary raising and tightening Even the time for line work can be included in the transportation time, which greatly shortens the construction period.

In addition, another feature of this wire-conveying method is that the automatic release of the electric wire from the carry device is reversed by pulling up the wire due to the temporary raising of the electric wire, and the mechanical change of this carry device is used to utilize the mechanical change of the carry device. By performing the operation by opening the door, it is possible to save the time and workers for the work of opening the electric wire from the carrier, shorten the construction period, and rationalize the construction.

Further, in the above-mentioned transport wire-drawing method, by causing the carrier to hold the electric wire, a tension greater than the dead weight of the electric wire between the carrier and the carrier is generated in the electric wire at any steep slope. It is possible to realize ideal low tension wire drawing, that is, high quality wire drawing. In addition, the grip also contributes to high quality by working to prevent rotation of the electric wire.

With regard to the above-mentioned transport wire extension method, when the rear end of the electric wire reaches the relevant tight line section, ropes for pulling work are attached to the rear end of the electric wire at the steel tower at the front end of the relevant tight line section and the terminal carrier From the electric wire, and then wind the tow rope until the front end of the electric wire reaches the steel tower at the front end of the relevant tight line section, and when the front end of the electric wire reaches the steel tower at the front end, pull up to the front end of the electric wire at this steel tower. If you attach work ropes, disconnect the terminal carrier from the wire, and then use the work ropes to pull up the wire to temporarily raise it, work will proceed more efficiently. it can.

〔Example〕

Embodiments of the present invention will be described below in order with reference to the drawings. In the following description, the construction method will be described first.
After that, related wire drawing equipment will be described.

Line extension of support rope and tow rope (Fig. 1) The support rope S and the tow rope J are extended to the lowest arm of the steel tower T over the entire wire extension section. A conventionally known method can be appropriately used for this wire drawing. Then, the support rope S is supported by the intermediate supporter 2 provided in each steel tower T, and the tow rope J is passed through the intermediate supporter 2.

Then, the support rope S and the tow rope J are connected to the intermediate supporter 2
Supported by. Since the intermediate supporter 2 has a structure described below, the support rope S and the tow rope J are separated and juxtaposed in the lateral direction.

Conveyance of electric wire (Fig. 2) In this conveyance extension method, the electric wire W is pre-fabricated by cutting it to a length corresponding to the tight wire section Ki to make the electric wire Wi, and the detention clamps C are compressed at both ends thereof. . The detention clamp C can be compressed in the drum field D, but it is more preferable to perform the compression in the factory beforehand in order to shorten the construction period.

First, in the drum field D, the front end of the _first electric wire W ₁ is connected to the terminal carrier 3t.

Then, the electric wires W ₁ are carried by the plurality of intermediate carriers 3, 3, ... And these carriers 3, 3, .. are connected to the tow rope J at a predetermined interval (usually 20 to 30 m) in a daisy chain form. At the same time, wind the tow rope J on the side of the engine field E until the rear end of the electric wire W ₁ comes out of the extended vehicle R.

Here, the electric wire Wi is not simply carried, but due to the structure of the carry device 3 as described later, a constant “dripping”, that is, a constant “sub-dip” occurs in the electric wire Wi between the carry devices 3. I also try to be gripped when it becomes.

With such a gripping structure, of course, the electric wire Wi is gripped for each carrier 3 to prevent the electric wire Wi from flowing downward on a steep slope and to be connected to the terminal carrier 3t. The purpose is to prevent the weight of the electric wire Wi from concentrating on the front end side of the electric wire Wi, but also to equalize the “sub-dip” between the transporters 3. In other words, until a certain "sub-dip" occurs, the carrier of the carrier 3 with respect to the wire Wi
3b is freely moved, and when a certain "sub-dip" is generated, the wire Wi is gripped to cause a uniform "sub-dip" between the transporters 3. The purpose of making the "sub-dip" uniform in this way is to maintain the posture of each carrier 3 in a vertical state and improve the passability to the intermediate support 2.

Then, the terminal carrier 3t is connected to the rear end of the electric wire W _{1 in} the same manner as in the case of the front end.

As shown in FIG. 3, a connecting jig P is used to connect the terminal carrier 3t to the electric wire Wi.
Counterweight CW is attached to.

Then, so as to open the appropriate intervals with respect to the rear end of the wire W _1, to process the next wire W ₂ in the same manner as the wire W _1.

After that, the same work is repeated for the wires W _{3 and} below.

In addition, it is necessary to open an appropriate space between each electric wire Wi.
The purpose is to reduce the load applied to the support rope S when the extended wire section is long and includes a large number of tight line sections. That is, if an appropriate space is provided between the electric wires Wi, the load on the support rope S is reduced accordingly, and a thinner support rope S is required. As a result, the winding length of the tow rope J is increased, It becomes more rational as a whole due to the work of drawing the support rope S and the specifications of the equipment and intermediate support used for it.

Also, in this way, each wire Wi is transported independently with an appropriate interval between each other, which means that it is a "split wire" that connects each wire Wi, which was taken for granted by the conventional construction method. Since it does not use "," it greatly contributes to the shortening of the construction period and the rationalization in that the processing work of the "split wire" on the way is eliminated.

Once the temporary increase (Figure 4 and Figure 5) the rear end of the top of the wire W ₁ of the electric wire reaches the appropriate緊線section K _1, firstly, the wire W in the tower Tf of the front end of the緊線section K _{1 1}
Pull-up rope (semi-assembly) UR used for pulling up at the rear end
Then, the delivery rope SR is attached and the terminal carrier 3t at the rear end (not shown in FIGS. 4 and 5) is disconnected from the electric wire W ₁ .

Then, while pulling out the feeding rope SR, the tow rope J is wound up until the front end of the electric wire W ₁ reaches the steel tower Tb at the front end of the tight wire section K ₁ .

Then, when the front end of the electric wire W ₁ reaches the steel tower Tb, the pulling rope UR and the delivery rope SR are attached to the front end portion of the electric wire W _{1 in} the steel tower Tb, and the terminal carrier 3t is separated from the electric wire W ₁ .

Then, the electric wire W ₁ is pulled up to the corresponding arm using the pulling rope UR and the sending rope SR.

At this time, when the carrying device 3 is reversed by pulling up the electric wire W _{1, the} carrying device 3 is caused by the structure of the carrying device 3 as described later.
The wire W ₁ is automatically released from.

For the electric wire W ₁ that has been pulled up to the corresponding arm, temporary raising or tightening is performed depending on the situation.

When the wire W ₁ from the recovery (Figure 6) carriage 3 of carriage is opened, in parallel with the temporary increase or緊線work described above, to start the winding of the traction rope J again, after the next electric wire W ₂ transported to the end to reach the appropriate緊線section K _X (to sometimes identical to緊線section K ₁ of the wire W ₁ or may not), performs the same operation as the wire W ₁ for the electric wire W _2. In response to this, the terminal carrier 3t and the carriers 3, 3,
.. sequentially arrives at the engine field E, so that the terminal transporter 3t and the transporters 3, 3, ... Are removed from the tow rope J and collected.

After the repetition, the same work is repeated for each wire, and the wire is extended for the entire wire extension section.

Although various forms are possible for this repetition, a preferable example thereof is as follows.

In other words, first, one layer is passed through the entire wire extension section so that the tension-resistant steel tower is not bent, and then each tension line section is sequentially cleaned up.

It should be noted that what has been described above is the most basic one, and various variations are possible as necessary.

For example, instead of pulling up the electric wire Wi for each single tight line section, it is possible to simultaneously pull up the plurality of tight line sections.

Further, not only a single-line extension line using one support rope S and one tow rope J, but also a multiple-line extension line using two or more support ropes S and two tow ropes J is also possible. It is also possible to perform "loop extension" in which the tow rope J is looped. In particular, the "loop extension" can make more efficient use of the features of the present method, such as automatic release of the electric wire from the carrier and provisional lifting or conveyance in parallel with the wire tightening work.

Further, this conveyance wire extension method can also be applied to OPGW.

In the case of OPGW (Fig. 7) In the case of OPGW, there is basically no difference from the above, but the optical connection box installed in the pull-down tower (corresponding to the tension tower) for processing the terminal. (Not shown) is used, and there is a peculiarity in that the tower lower part Ld of several tens of meters is provided at both front and rear ends for this end treatment. An example of this point will be described below.

Since there is a lowering part Ld in the steel tower, the same lifting rope UR and sending rope SR as in the above case are used in the lowering part Ld in the steel tower.
In addition to being attached to the base end portion of, the pull-down rope DR for pulling down the inside-steel tower lowering portion Ld into the inside of the steel tower is attached to the tip portion of the inside-steel tower lowering portion Ld.

When installing each of these ropes UR, SR, DR, there is a distance of several tens of meters between the tip and the base end of the lowered part Ld in the steel tower. By repeating the above procedure, the above-mentioned attachment portions of the ropes UR, SR, DR are brought to the steel towers Tf to Tb, and the work of attaching the ropes UR, SR, DR is performed on the steel towers Tf to Tb.

Carriage for both terminals after installation of each rope UR, SR, DR is completed
Although 3t is to be separated, this work may be carried out by bringing the terminal carrier 3t to the towers Tf to Tb, or by remote operation from the towers Tf to Tb using, for example, a rope for operation. It may be performed.

Next, the ropes UR, SR, and DR are used to pull up the entire OPGW to the ground wire arm and pull down the inside tower lowering portion Ld into the inside tower T. At this time, as seen in the figure, the base end part of the lowering part Ld in the steel tower will bend to some extent,
The curvature of this bend is the allowable curvature of the OPGW (500 mm
In order to prevent it from becoming smaller, the protector has a structure that bends from the cam along Cm, which is used to attach the pulling rope UR and the sending rope SR, to a curvature of, for example, 500 mm, but does not bend any further. (Not shown) is extended and this protector lowers the inside of the tower.
Protect the base end of Ld.

Hereinafter, the intermediate support device 2 will be mainly used as a related wire drawing device.
An example of the carrier 3 will be described.

Intermediate Supporter The intermediate supporter 2 includes a side main frame 10, an upper frame 11, and a side auxiliary frame 12 as shown in FIGS. 8 and 9.
Is formed in a gate shape, and the first support portion 13 for supporting the tow rope J and the second support portion 14 for supporting the support rope S are separated and arranged in parallel in the gate shape in the lateral direction (horizontal direction). It is provided by being suspended, and is used by being suspended from a steel tower via a suspension part 15 provided in the upper frame 11.

Here, laterally (horizontally) separation / parallel does not necessarily mean only the case where the support rope S and the tow rope J are located in the same horizontal plane. It means a state in which both are separated in the horizontal direction (horizontal direction) to the extent that no contact occurs between them.

The first support portion 13 is formed on a main bracket 16 protruding from the side main frame 10 toward the inside of the gate, and includes lower support rollers 17 and 17 and an upper portion which are laterally provided in a pair in the front and rear direction, respectively. The support space 21 is formed by the regulation rollers 18, 18 and a pair of left and right side regulation rollers 19a, 19b provided upright on the regulation rollers 18, 18. Then, the upper regulation roller 18 and the lower support roller 17
It is made shorter than the above, and a constant gap is formed as a passage gap 22 with the side portion regulation roller 19a. In this example, as will be described later, the intermediate support 2 is
Since it is for use as a set one by one, only a pair of left and right side regulation rollers 19a, 19b are provided, but in the case of being used alone as in other examples described later, the pair of front and rear pairs is also provided. To be provided.

Since the support space 21 in the first support portion 13 only has the passage gap 22, it has a structure sufficient to prevent derailment of the tow rope J, and the necessary safety is secured. Further, if necessary, it is easy to close the passage gap 22 to form a completely closed space by adopting a structure using a "connecting plate" in the wire drawing equipment shown in Japanese Patent Application No. 109202 of 1991.

The second support portion 14 has an auxiliary bracket 23 extending further from the main bracket 16 and is provided at the tip of the auxiliary bracket 23. A holding clamp 24 having a U-shaped cross section is provided on a support roller 25 for supporting the support rope S. It is provided so as to cover, and by holding with this holding clamp 24,
The relative movement of the support rope S with respect to the second support portion 14 is allowed in the front-back direction, but the support rope S is allowed to move vertically and horizontally.
The support rope S can be supported in a "semi-fixed state" in which the second support portion 14, that is, the intermediate supporter 2 follows the movement of the.

By thus semi-fixing the support rope S to the second support portion 14, as will be described later, the intermediate supporter 2 always follows the movement of the support rope S due to the change in the catenary angle and the like. As a result, the stable passability of the carrier 3 is ensured.

The lock releasing means 26 is provided below the auxiliary bracket 23, and its function will be described later in relation to the carrier 3.

FIG. 9 shows an example in which three intermediate supporters 2 are used as a set via a base body 31 having a hanging portion 30 for hanging on a steel tower.

That is, three intermediate supporters 2 are suspended with respect to the base body 31 so as to be symmetrical in the traveling direction of the carrier 3, and the distance between each intermediate supporter 2 and the base body 31 is the support rope S. Is automatically adjustable according to the movement of the intermediate supporters 2 and the intermediate supports 2 are automatically arranged on a curve corresponding to the catenary angle of the support rope S in the steel tower.

Specifically, each of the front and rear intermediate supports 2a, 2a is suspended by a movable suspension member 32, and the central intermediate support 2b is suspended by a fixed suspension member 33.
Is suspended in the base body 31 through a long hole 34 formed in the base body 31 so as to be elongated in the left-right direction (front-back direction).

In addition, each of the intermediate supports 2a, 2b, 2a,
The fixed connecting members 35, 35, ... Fixed to b, 2a are hingedly connected to each other so that their lower ends are connected to each other, and both ends are hingedly connected to the respective intermediate supports 2a, 2b, 2a. Upper end sides thereof are connected to each other via the expansion and contraction connecting member 36.

As shown in FIG. 10, the expansion and contraction connecting member 36 has two sets of rods 38, 38 each having a connecting plate 37, 37 at one end.
... fix the spring receiving plates 39, 39 to the other end, and allow the rods 38, 38 of each set to pass through the spring receiving plates 39 of the rods 38, 38 of the other set, and A compression spring 40 (not shown in FIG. 12) is sandwiched between 39 and 39. In other words, the expansion and contraction connecting member 36 is always biased by the compression spring 40 in a direction to try to shrink, and this biasing force balances with the own weight of the intermediate support 2a, so that the support rope S moves especially upward. In addition, the intermediate support 2 can easily follow this movement.

With such a structure, the support rope S is indicated by the arrow X.
As described above, since the support rope S is in the semi-fixed state as described above, the intermediate supporter 2a moves following it, and the movable suspension member 32 is in a state shown by an imaginary line as an example. Move in the direction of arrow β so that. As a result, the distance between the intermediate supporter 2a and the base body 31 automatically changes.

In this way, it is necessary to use a plurality of intermediate supports 2 as a set, and to automatically arrange each intermediate support 2 on the curve corresponding to the catenary angle of the support rope S. Since the catenary angle is divided into the intermediate supports 2 and the angle of the support rope S with respect to the intermediate supports 2 is small, the passability of the carrier 3 is improved.

The intermediate supporter 63 shown in FIGS. 16 and 18 is for a pulling point in a large valley portion, and is basically the same as the intermediate supporter 2 described above, but it is not necessary to adjust the number to suit the pulling point. In that respect, special ideas have been elaborated.

Here, the pulling point is, for example, as shown in FIG. 19, a steel tower T at the bottom of a valley where the steel towers T on both sides are peaks and the steel tower T between them is at the valley bottom. ,
In the steel tower T at the bottom of the valley, the support rope S and the tow rope J are called in this way because a force that always pulls them upward is working.

The main differences between the intermediate supporters 63 will be described below.

Since this intermediate supporter 63 is usually used alone unlike the above-mentioned one, the side regulating rollers 19a and 19b are arranged to be paired in the front and rear.

An auxiliary upper restriction roller 64 is attached to the first support portion 13, and the auxiliary upper restriction roller 64 restricts the tow rope J that happens to pass through the passing gap 22 and rises upward. The tow rope J is forced by the connecting portion 43 and naturally returns to the support space 21 when the carrier 3 passes.

Assuming that the support rope S is in the state shown in FIG. 18, the second support portion 14 is also provided with an auxiliary support roller 65 also above the support rope S as shown in FIG. ing. In addition, since a step is generated between the support rope S and the support rope S, the guide members 66, 66 are provided as a front and rear pair to eliminate this step. This guide member 66 is
It is a conical combination of two halves, which is loosely covered on the support rope S. The guide member 66 is attached to the holding clamp 24 via a connecting member 67, and is rotated as indicated by an arrow U according to the movement of the support rope S.

A fixing eye ring 68 is attached to each of the side main and side auxiliary frames 10 and 12, and the intermediate support 63 itself is supported by fixing to the tower through the fixing eye ring 68. The rope S prevents it from being pulled up.

Carrier 3 Carrier 3, as shown in FIGS. 11 and 12, is a carrier body 3a.
The carrier main body 3a includes a traveling part 42 for traveling on the support rope S, a connecting part 43 for connecting to the tow rope J, and a carrier 3b for carrying an electric wire on the hanging rope 45. Although the hanging portion 46 for hanging through is provided, the traveling portion 42 and the connecting portion 43 are substantially the same as the interval between the first and second supporting portions 13 and 14 of the intermediate supporter 2. It is designed to be laterally separated and juxtaposed at the same interval.

The traveling unit 42 includes a pair of front and rear traveling rollers 47, 47, ...
..., a unitary structure having a pair of front and rear side rollers 48, 48 and an opening / closing frame 49, and having a closed space 50 surrounded and formed by the traveling roller 47, the side rollers 48 and the opening / closing frame 49 belongs to.

The reason why the closed space 50 is formed in this way is to prevent derailment from the support rope S and to further enhance safety.

The open / close frame 49 is for allowing the closed space 50 to pass through the second support portion 14 of the intermediate support device 2 and supports the carrier 3 by inserting the support rope S in the closed space 50. It is also a door for setting on the rope S.

Specifically, the opening / closing frame 49 has a pantograph shape with four corners formed as a turning pair, and usually an engaging recess 52 formed at the lower end of the opening / closing frame 49 by a rod-shaped locking means 51.
Locked by engaging with
By rotating 51 as shown by the arrow Y in FIG. 11 and removing it, pantograph-like movement becomes possible, and it opens in the state shown by the imaginary line in FIG.

When passing through the intermediate supporter 2, the locking means 51 presses the ship-shaped lock releasing means 26 provided on the intermediate supporter 2 and pushes it downwards in a relationship as shown in FIG. Then, the lock is released by rotating as indicated by the arrow Y, and in this state, the opening / closing frame 49 hits the auxiliary bracket 23 of the second support portion 14 to open and allow passage. Moreover, when putting the support rope S in the closed space 50,
The lock is released and the opening / closing frame 49 is opened / closed by a human hand.

The connecting portion 43 is provided at the other end of the connecting arm 53 which is connected to the upper end of the running portion 42 at one end by a hinge connection and extends in the lateral direction. As shown in FIG. 13, the connecting portion 43 has a conical loose portion. 54,
A column-shaped holding portion 55 is provided while 54 is symmetrical in the front-rear direction, and has a spindle shape as a whole.

As shown in FIG. 15, the loose portion 54 is composed of a pair of divided pieces 56, 57 having bracket portions 56b, 57b, respectively, and one of the divided pieces 56 has a connecting arm 53 via the bracket portion 56b. The other divided piece 57 is detachably attached to the one divided piece 56 through the bracket portion 57b, and the outside of the tow rope J in the state where the both divided pieces 56 and 57 are combined. A loose hole 58 having an inner diameter slightly larger than the diameter is formed. In addition, in FIG. 15, the holding part
Illustration of 55 is omitted.

As shown in FIG. 14, the holding portion 55 is divided into two parts about the pin 59 as an axis, and the lock bolt 60 is tightened to hold the tow rope J in the holding hole 61. , The loose portions 54, 54 are separated from each other, and the pulling rope J passed through the loose portions 54, 54 is fixed to fit between the loose portions 54, 54.

Therefore, the connecting portion 43 is fixed to the tow rope J in the front-rear direction, but is free to rotate with respect to the tow rope J. That is, the connecting portion 43 is the tow rope J.
Is connected by a hinge connection.

As described above, the structure in which the connecting portion 43 hingedly connected to the tow rope J is provided at the tip of the connecting arm 53 which is hingedly connected to the upper end of the running portion 42 and one end of which is extended in the lateral direction is hung through the tow rope J. It is not necessary to apply a tensile load to the traveling unit 42, and as a result, the required structural strength is only a fraction, which brings about an advantage that the weight of the carrier 3 can be greatly reduced, and at the same time, the carrier 3 can be transported. Inversion is surely prevented, which brings an advantage that the wire drawing work can be made more stable.

The suspension portion 46 is attached to the traveling portion 42 via the suspension bracket 62, and is configured to rotate with respect to the traveling portion 42 as indicated by arrow Z in FIG. Therefore, the hanging portion 46 can always maintain the vertical state even when the traveling portion 42 is inclined depending on the inclination state of the support rope S.

The relationship in which the carrier 3 passes through the intermediate support 2 is as shown by an imaginary line in FIG.

That is, as described above, the opening / closing frame 49 opens to the second support portion 14 so that the traveling portion 42 can pass therethrough. By passing it, the connecting portion 43 can be passed.

The carrier 3b has a connecting portion as shown in FIGS.
71, a pair of doors 72, 72, three carrier rollers 73, 73, 73, a lock device 74, and a carrier 100.

The connecting portion 71 is a hanging rope 45 that is interposed between the connecting portion 71 and the carrier body 3a.
Connection lever 77 to which an eye ring 76 for connecting is attached and a mounting portion 78 to which the doors 72 and 72 are mounted. The connection lever 77 is fitted in a guide cylinder 79 of the mounting portion 78 in a sliding contact state. It is adapted to slide with respect to the mounting portion 78 as indicated by arrow I. The connecting lever 77 is normally provided between a flange-shaped lock claw releasing body 80 integrally formed with the connecting lever 77 and a nut-shaped receiving body 81 mounted on the lower end of the mounting portion 78. It is in a state of being pulled in the direction of the arrow M by the stretched spring 82.

The doors 72, 72 are attached to the attaching portion 78 as described above, but more specifically, they are attached by bolts and nuts 83 and are rotatable as indicated by arrow N. .

The carrying roller 73 has a gentle truncated cone shape, two front and rear are fixed to one door 72, and one of the different directions is fixed to the other door 72 to form a carrying groove 84. is doing. Regarding the inclination angle of the carrying roller 73, the load of the electric wire W serves to open the doors 72, 72, and at the same time,
If it is too large, the force for opening the doors 72, 72 becomes too large, and the door lock frame of the lock device 74 described later will be used.
There is a relationship that worsens the sliding property of 85.

The locking device 74 includes four rollers 86, 86, ..., Which are provided in pairs on the side surface, and four rollers 87, 87, which are provided one on each of the front and rear surfaces, and four rollers, which are provided on each of the front and rear pairs on the side surface. A door lock frame 85 formed by combining the connection frames 88, 88, ... into a rectangular frame shape, a pair of lock claws 89, 89, and a pair of upper stoppers 90, 90 and a pair provided on the doors 72, 72, respectively. Lower stopper 91, 91
And consists of.

And the door lock frame 85 is arranged in a state of surrounding the doors 72, 72,
It is slidable in the direction of arrow Q (up and down direction), and the upper and lower limits of sliding are regulated by both upper and lower stoppers 90, 90, 91, 91. Further, the lock claws 89, 89 are attached to the doors 72, 72 by the bolts / nuts 83 described above.
It is attached to the mounting portion 78 together with and is rotated as indicated by an arrow α, and is biased in the V direction indicated by an arrow by a torsion spring (not shown).

Reference numeral 92 in FIG. 22 is a regulating roll for preventing the electric wires from touching the corners of the doors 72, 72.

The gripping body 100 has a concave groove 101 lined with a material having a large friction coefficient such as a rubber-based material, and the concave groove 101 is adapted to be capable of being pressed against the electric wire W on the carrying groove 84. There is.

That is, the carrier 100 is attached to the mounting portion 78 such that the distance between the carrier 100 and the carrier groove 84 is larger than the diameter of the electric wire W by a certain amount, and the electric wire W on the carrier groove 84 is straight. As long as the wire W is not pressed, the wire W does not exert its gripping force, but as shown in FIG. 2, the wire W has a constant “hang”, that is, a constant “sub-dip” between the transporters 3.
When the electric wire W on the carrying groove 84 becomes mountainous, the electric wire W is pressed and held to grasp the electric wire W (FIG. 24).

The holding structure using the carrier 100 is, of course, required to prevent the downward flow of the electric wire W on a steep slope by holding the electric wire W for each carrier 3.
The purpose is to prevent the self-weight from concentrating at the tip of the carrier, but to further equalize the "sub-dip" between the carriers 3. That is, the carrier 3b is freely moved with respect to the electric wire W until a constant "sub-dip" occurs, and the electric wire W is gripped when the constant "sub-dip" occurs, so that a uniform "sub-dip" is obtained between the carriers 3. It causes a "dip".

In this way, the purpose of making the “sub dip” uniform is to keep the posture of each carrier 3 in a vertical state and
This is for improving the passability to.

The operating state when the carrier 3 automatically opens the electric wire W is as follows.

That is, as described above, when the electric wire W is pulled up and the carrier 3 is inverted to apply a tensile force of a certain amount or more to the hanging rope 75, the connection lever 77 resists the spring 82 and is different from the arrow M direction. By sliding in the opposite direction, the lock claw releasing body 80 rotates the lock claws 89, 89 to the state shown in FIG. Then, the door lock frame 85 that has lost the support by the lock claws 89, 89 falls by its own weight until it hits the stoppers 90, 90 and stops. As a result, the rollers 86, 86 of the door lock frame 85 have the bolts and nuts 83, which are pivotal fulcrums of the doors 72, 72.
23, the doors 72, 72 are opened to the state shown in FIG. 23 by their own weight while receiving the force due to the load of the electric wire, and the carrier 17 is released from the electric wire W.

〔The invention's effect〕

The transport wire-drawing method according to the present invention has the following effects because it is as described above.

(A) Since the electric wires are independently conveyed, and the electric wires that have reached the corresponding tension line section are sequentially raised or tightened, the subsequent electric wires are conveyed and the carrier is collected, so that the carrier is simply collected. Not only can work be prevented from increasing the work period, but also the time for temporary lifting and tight-fitting work can be included in the transfer time, greatly shortening the work period.

(B) Since the carrier is turned upside down by pulling up the electric wire temporarily and the door of the carrier is opened by using the inverted state of the carrier, the electric wire from the carrier is automatically opened. The time and labor can be saved, and the construction period can be shortened and the construction can be rationalized.

(C) By combining the grasping of the electric wire by the carrier, it is possible to prevent the electric wire from being subjected to a tension more than its own weight between the carrier and the carrier at any steep slope,
It is possible to realize the ideal low tension wire drawing. Further, since the grip also works to prevent the rotation of the electric wire, higher quality can be realized.

(D) The time required for this opening work by combining the automatic opening of the electric wire from the carry device by reversing the carry device by pulling it up with the temporary raising of the electric wire and using the inverted state of the carry device to open the door of the carry device. And save workers,
The construction period can be shortened and the construction can be rationalized.

[Brief description of drawings]

FIG. 1 is a drawing of the supporting ropes and the tow ropes in a drawing, FIG. 2 is a drawing of electric wires, FIG. 3 is a drawing of connecting electric wires to a terminal carrier, and FIGS. Fig. 6 is a state diagram of temporary raising of electric wires, Fig. 6 is a state diagram of transporting and collecting carrier after temporary raising of electric wires, Fig. 7 is a diagram corresponding to Fig. 4 of OPGW, and Fig. 8 is an intermediate support device. FIG. 9 is a schematic side view including partial cross-sections, FIG. 9 is a schematic side view including partial cross-sections in a state in which an intermediate support is assembled, FIG. A schematic side view of FIG. 12, FIG. 12 is a schematic side view of the carrier seen from the arrow XII direction in FIG. 11, and FIG. 13 is a schematic plan view of the connecting portion seen from the arrow XIII direction in FIG. FIG. 14 is a schematic cross section taken along the line XIV-XIV in FIG. 13, FIG. 15 is a schematic cross section taken along the line XV-XV in FIG. 13, and FIG. 16 is another embodiment. Example of intermediate support FIG. 17 is a schematic side view including a partial cross section, FIG. 17 is a schematic cross sectional view of the second support portion in FIG. 16, and FIG. 18 is a partial cross section of the intermediate support seen from the direction of the arrow XVIII in FIG. Including schematic side view, FIG. 19 is a schematic side view showing a pulling point, FIG. 20 is a schematic side view including a partial cross section of a carrier, FIG. 21 is a schematic perspective view of a carrier, FIG. 22 Is a schematic side view including a partial cross section as seen from the direction of the arrow XXII in FIG. 20, FIG. 23 is a schematic side view of the carrier which is inverted to be in the carrier open state, and FIG. 24 is a carrier. It is a side view which simplifies and shows the state where an electric wire is grasped by the body. 2 ... Intermediate support 3 ... Transporter S ... Support rope J ... Tow rope W ... Electric wire T ... Tower

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideo Akai Hideo Akai 3-27-12 Horikiri, Katsushika-ku, Tokyo Stock company Yasuda Manufacturing Co., Ltd. (72) Inventor Susumu Sato 3-27-12 Horikiri, Katsushika-ku, Tokyo Stocks Within Yasuda Manufacturing Co., Ltd. (56) Reference JP-A-57-13909 (JP, A) JP-A-59-8122 (JP, A)

Claims (3)

[Claims] 1. In a wire-conveying construction method in which electric wires are conveyed and extended by a conveyer which is pulled by a tow rope in a daisy chain shape and travels on a support rope, the wire is previously cut to a length corresponding to a tight line section. Wires are transported independently, with proper spacing between each wire, with both front and rear ends held by terminal carriers and the intermediate part carried by multiple intermediate carriers. When reaching the tight line section, after disconnecting the carrier for both terminals, pull up the wire to invert the carrier, and use the inverted state of this carrier to open the door of the carrier to automatically carry the wire by the carrier. And temporarily move the electric wire released from the intermediate carrier to the corresponding tower arm to temporarily raise or tighten the wire, and wind up the tow rope to collect each empty carrier. The corresponding wire The same work as the previous wire is performed for this wire, and the same work for each subsequent wire is repeated for the entire wire extension section until the wire extension is completed. Wire construction method. 2. The transport wire-drawing method according to claim 1, wherein the carrying device holds the electric wire. 3. When the rear end of the electric wire reaches the relevant tie wire section, ropes for pulling work are attached to the rear end of the electric wire in the steel tower at the front end of the relevant tie wire section, and the terminal carrier is disconnected from the electric wire. Take up the tow rope until the front end of the electric wire reaches the steel tower at the front end of the relevant tension line section, and when the front end of the electric wire reaches the steel tower at the front end, pull ropes for pulling work to the front end of the electric wire at this steel tower. The conveyance wire-drawing method according to claim (1) or (2), wherein the terminal carrier is attached and separated from the electric wire, and the electric wire is pulled up by using ropes for pulling up work.