JPH0340703A - Wire carrying/drawing method - Google Patents

Abstract

PURPOSE:To shorten the schedule and to stretch the wire safely by holding a plurality of wires precut according to the length of wire stretching section on a carrier then pulling the carrier independently on a supporting rope in the wire stretching section by means of a pull rope and repeating the operation. CONSTITUTION:An intermediate support 2 is suspended from a steel tower standing between a drum station D and an engine station E located at the opposite ends of a wire stretching section Ki. A supporting rope S on which a carrier 3 travels and a rope J for pulling the carrier 3 are inserted horizontally, while separating each other, into the intermediate support 2. A wire W is previously cut into such length as corresponding to the wire stretching section Ki. At first, front end of a leading wire W1 is connected with a terminal carrier 3t at the drum station D. Then the wires W1 are held on a plurality of intermediate carriers 3 and connected, in chain, with the pull rope J which is then wound in the engine station E until the rear end of the wire W1 exits a drawing vehicle R. The wire W1 is temporarily placed on a specific arm of the steel tower T and secured thereto. In similar manner, wires W2, W3 are stretched sequentially and secured. By such method, schedule is shortened and the wire is stretched smoothly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a conveying and extending method for conveying and extending electric wires using a carrier.

In this specification, the term "rope" includes both fiber ropes and wire ropes. Also,
The term "electric wire" includes not only ordinary power transmission lines, but also communication cables such as optical fiber cables, and optical fiber composite overhead ground wires (0PGWs) that incorporate optical fiber cables.

[Prior Art and Problems to be Solved by the Invention] Since the conveying wire extension method involves carrying and conveying electric wires using a carrier, it has many advantages as described below.

(a) High-quality wire can be drawn because the wire is not subjected to strain such as wire tension or rotation during wire drawing, and there is no damage to the wire due to dust or iron powder adhering to the metal wheel.

(b) Since no wire tension is applied and there is little rotation of the electric wire, the elongation of the electric wire during the wire stretching is extremely small, making it possible to improve the quality and simplify the wire tensioning work for multi-conductors.

(e) Since the retaining clamp can be compressed in advance, the construction period can be shortened.

(d) Since no bending force is applied to the retaining clamp during wire drawing, a protector for the retaining clamp is not required. In other words, since the work of installing the protector at the drum field and removing the protector on the steel tower is not necessary, it is possible to streamline the work and shorten the construction period.

(e) It becomes unnecessary to extend the rope for pulling out the electric wire. especially,
The work can be greatly streamlined because the work required by craftsmen to cross and rearrange the lines for extending the pulling rope is eliminated.

These advantages can, of course, be utilized in general power line stretching, but especially in prefabricated wire stretching, where stretching can be done with little tension on the wire, stretching of the wire due to wire tension is the least of concern. In addition, UHV (1 million volt power transmission) prefabricated cable extensions, which have poor location conditions and are difficult to apply the pull-out construction method compared to conventional cables, and which require greater reliability than normal cables, or Its effectiveness is most demonstrated in 0PGW wire extensions, etc., which require stricter conditions regarding tension and rotation.

On the other hand, the conveyance wire extension method may have disadvantages or may not provide the above-mentioned advantages.

In other words, in addition to intermediate supports, which correspond to metal wheels in the pull-out construction method, a large number of relatively expensive carriers are required, which increases costs accordingly, and the work of recovering the carriers is added to the process. In this case, the above-mentioned factors to shorten the construction period will be canceled out, and as a result, the advantage of shortening the construction period will not be obtained, or in steep mountainous areas, the entire weight of the wire will be applied in the direction of the wire's pull due to the long steep slope. As a result, considerable tension is generated especially on the front end side of the electric wire, which may not necessarily result in low-tension wire drawing.

Conventional examples of such conveyance and extension construction methods include, for example, the 33rd collection of power transmission line construction materials (Transmission line construction technology research group;
There are construction methods such as those shown on pages 61 to 131 of the publication published in December 2013.

However, this conventional construction method was developed for the purpose of extending 0PGW, and sufficient consideration has not been given to the disadvantages mentioned above, and even if it is applied as is to the extension of multi-conductor power lines, it will not necessarily work. This method does not allow the above-mentioned advantages of the conveyance wire extension method to be fully utilized.

In addition, since this technology separates and parallels the support rope and tow rope in the vertical direction,
For example, the support rope and the towing rope may come into contact with each other, which means that the tow rope, which should normally be located at a certain distance below the support rope, may float up and come into contact with the support rope as the balance of load and tension on each rope fluctuates. It is unavoidable that the phenomenon of crossing or crossing occurs.

If this contact occurs, the ability of the carrier to pass through the intermediate support may deteriorate, or the carrier may turn over during transportation, causing unexpected trouble or delays in the line extension work. be.

Therefore, in this invention, we have developed a method that can maximize the advantages of the conveyor wire extension method, that is, high quality and shortened construction time, and can more than compensate for the increase in cost due to the increase in equipment. This is what we are trying to provide.

[Means and effects for solving the problem] Specifically, when electric wires are transported and extended by a carrier that is pulled in a daisy-like manner by a tow rope and runs on a support rope, the tow rope and the support rope are To provide a conveyance and extension method in which the wires are separated and arranged in parallel in the horizontal direction.

A feature of such a conveying wire extension construction method is that the support rope and the pulling rope are separated and arranged in parallel in the horizontal direction, so naturally there is no problem of contact between them.

In addition, the structure in which the support rope and the traction rope are separated and arranged in parallel in the horizontal direction allows the conveyor extension method to be easily applied to areas where pulling force is applied to the support rope and traction rope, such as in large valleys. It also brings the advantage of

In addition, in order to carry and extend electric wires using a carrier that is towed in a daisy-like manner by a tow rope and runs on a support rope, we cut the electric wires in advance to a length corresponding to the tensioned line section, so that both the front and rear ends are used as terminals. With the intermediate parts held by a carrier and carried by multiple intermediate carriers, each wire is transported independently with an appropriate interval between them, and when the wire reaches the corresponding tension section, both terminals are After the utility carrier is disconnected, the wire is automatically released from the intermediate carrier, and the wire released from the intermediate carrier is moved to the corresponding tower arm to raise the plank or tighten the wire while the tow rope is removed. At the same time as winding up and collecting each empty carrier, the next wire is brought to the relevant wire section, the same work is done on this wire as on the previous wire, and the same work is postponed on each subsequent wire. To provide a conveyance line extension construction method that repeats until the line extension is completed for the entire line section.

One of the characteristics of this conveying wire extension construction method is that each wire is conveyed independently, that is, the wires are conveyed in parts, and the wires are boarded up or strung in sequence starting from the wire that has reached the relevant strain section. The point is that the following electric wires are transported and the carrier is collected in parallel. In other words, by carrying out board hoisting or tensioning in parallel with the subsequent transport of electric wires and recovery of the carrier, it is possible not only to avoid the carrier recovery work from becoming a factor in increasing the construction period, but also to avoid raising the board and tensioning. Even the work time can be included in the transportation time, which will greatly shorten the construction period.

In addition, in the above-mentioned conveying wire extension method, by having the electric wires held by the electric wires, a tension greater than the weight of the electric wires between the two conveyors is generated on the electric wires, no matter how steep the slope. This eliminates the need for low-tension wire drawing, making it possible to achieve high-quality wire drawing. In addition, the grip also works to prevent the electric wire from rotating, which greatly contributes to higher quality.

Furthermore, in the above-mentioned wire transfer method, the automatic release of the wire from the carrier can be achieved by inverting the carrier by pulling it up as the wire is raised, and by opening the door of the carrier using the inverted state of the carrier. If this is done, the time and labor required for this opening work can be saved, the construction period can be shortened, and the construction can be streamlined.

〔Example〕

Hereinafter, embodiments of the present invention will be described step by step based on the drawings. In the following explanation, we will first explain the construction method,
After that, related wire extending equipment will be explained.

Extension of support rope and traction rope (Fig. 1) The support rope S and traction rope J are extended to the lowermost arm of the steel tower T over the entire extension section. For this wire extension, conventionally known methods can be used as appropriate. Then, the support ropes S are supported by intermediate supports 2 provided on each steel tower T, and the traction ropes J are passed through the intermediate supports 2.

Then, the support rope S and the traction rope J are connected to the intermediate support 2.
Supported by Since the intermediate support device 2 has a structure as described later, the support rope S and the traction rope J are separated and arranged in parallel in the lateral direction.

Transportation of electric wire (Figure 2) In this transportation and extension method, the electric wire W is cut in advance to a length corresponding to the tension section Ki and prefabricated to form the electric wire Wi, and retaining clamps C are compressed at both ends of the electric wire Wi. . Although the compression of the retaining clamp C can be performed at the drum factory, it is more preferable to perform the compression in advance at a factory or the like in terms of shortening the construction period.

First, the front end of the leading electric wire Wl is connected to the terminal carrier 3t at the drum station.

Then, a plurality of intermediate carriers 3.3,...'' electric wires W
At the engine station E side, the carriers 3.3 and 2 are connected to the tow rope J in a stringed manner at predetermined intervals (usually 20 to 30 m), and the tow rope J is connected to the electric wire Wl. Wind it up until the rear end of it comes out of the railway car R.

Here, the electric wire Wi is not only supported, but also in a state in which a certain "sagging", that is, a certain "sub-dip" occurs in the electric wire Wi between the respective carriers 3 due to the structure of the carrier 3 as described later. It is also designed so that it can be grasped at any point.

Of course, such a gripping structure was adopted because each carrier 3 grips the electric wire Wi.
The purpose is to prevent the electric wire Wi from flowing downward and to prevent its own weight from concentrating on the front end side of the electric wire Wi connected to the terminal carrier 3t. It is also for uniformity. In other words, until a certain "sub-dip" occurs, the carrier 3
The carrier 3b can be moved freely to create a certain "sub-dip".
By gripping the electric wire Wi at the point where the electric wire Wi is generated, a uniform "sub-dip" is created between the respective carriers 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 passage through the intermediate support 2.

Next, the terminal carrier 3t is connected to the rear end of the electric wire Wl in the same manner as the front end.

As shown in FIG. 3, a connection jig P is used to connect the terminal carrier 3t to the electric wire Wi, and the front of the counterweight C is attached to this connection jig P.

Then, the next electric wire W2 is processed in the same manner as the electric wire WI, leaving an appropriate distance from the rear end of the electric wire Wl.

Thereafter, the same operation is repeated for the electric wire W and the following.

The purpose of providing an appropriate interval between the electric wires Wl is to reduce the load applied to the support rope S when the wire extension section is long and includes many tension sections. In other words, if an appropriate interval is left between each electric wire Wl, the load on the support rope S will be reduced accordingly, and a thinner support rope S will be sufficient.As a result, the traction rope J
Although the winding length increases, the extension work of the support rope S,
Considering the specifications of the equipment and intermediate supports used for this purpose, the overall result is more reasonable.

In addition, each wire Wi is transported independently with an appropriate interval from each other, but this is different from the "split wire" that connects each wire Wl, which was taken for granted in conventional construction methods. ” This means that there is no need to process “split wire” during the process, which greatly contributes to shortening and streamlining the construction period.

When the rear end of the leading electric wire Wl reaches the relevant strain section, first, the electric wire is connected to the steel tower Tf at the near end of 1 in this strain section. At the rear end of Wl is a lifting rope (
Semi-assembly) UR and delivery rope SR are attached, and the terminal carrier 3t at the rear end (not shown in FIGS. 4 and 5) is separated from the electric wire Wl.

Next, while sending out the sending rope SR, the pulling rope J is wound up until the front end of the electric wire Wl reaches the steel tower Tb at the forward end of the electric wire Wl in this tension section.

Then, when the front end of the electric wire Wl reaches the steel tower Tb, a pulling rope O is attached to the front end of the electric wire Wl at this steel tower Tb.
R and sending rope SR are attached, and the terminal carrier 3t is separated from the electric wire Wl.

Then, use the pulling rope OR and sending rope SR to pull up the electric wire Wl to the corresponding arm.

At this time, when the carrier 3 is reversed by pulling up the electric wire WI, the electric wire Wl is automatically released from the carrier 3 due to the structure of the carrier 3, which will be described later.

For the wires Wl that have been pulled up to the relevant arm, the wires will be hoisted up or, depending on the situation, up to the tension line.

Retrieval of the carrier (Fig. 6) When the electric wire Wl is released from the carrier 3, in parallel with the above-mentioned board raising and wire tensioning work, the winding of the towing rope J is started again, and the rear end of the next electric wire W2 is In the relevant wire section, (wire Wl
wire W2, which may or may not be the same as
Perform the same operation as in l. In response to this, the terminal carriers 3, 3.3, . Remove ... from the tow rope J and collect it.

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

Various formats are possible for this repetition, but a preferred example is as follows.

That is, first, one layer is passed through the entire line section to prevent the tension tower from sagging, and then each section of the line is cleared one by one.

Incidentally, what has been explained above is the most basic one, and various variations are possible as necessary.

For example, it is also possible to pull up the electric wire Wi not for each tension section, but for a plurality of tension sections at the same time.

In addition, it is possible not only to run a single wire using one supporting rope S and one pulling rope J, but also to run a multi-thread wire using two or more supporting ropes S and two or more pulling ropes J. A "loop extension" in which the tow rope J is looped is also possible.

In particular, "loop wire extension" can more efficiently take advantage of the features of this construction method, such as automatically releasing the wire from the carrier and conveying it in parallel with the board raising or wire tensioning work.

Moreover, this conveying line extension method can also be applied to 0PGW.

In the case of 0PGW (Figure 7) In the case of OPGW, there is basically no difference from the above, but the optical connection box installed on the pull-down tower (corresponding to the tension tower) is used to process the terminal. (not shown) is used, and is unique in that several tens of meters of lowered portions Ld within the tower are provided at both front and rear ends for this terminal treatment. An example of this point will be explained below.

Since there is a pull-down part Ld inside the steel tower, in addition to attaching the same pulling rope OR and sending lobe SR as in the case described above to the base end of the pull-down part Ld inside the steel tower, a The pulling down rope DR is attached to the tip of the pulling down part Ld inside the steel tower.

When installing these ropes UR, SR, and DR, the distance between the tip and base of the lowered part Ld in the tower is several tens of meters.
There are also 3 tons of carriers each time.

3. Repeat the forward and backward movement of "°'°-" to each rope.
The above-mentioned installation of 1SR and DR is done so that the parts are located on the steel towers Tf to Tb, and the work for installing each rope UR, SR, and DR is performed on the steel towers Tf to Tb.

When the installation of each rope UR, 5R1DR is completed, the carriers 3t for both terminals are separated, but this work may be carried out by bringing the carriers 3t for terminals to the steel towers Tf to Tb, or This may be done by remote control from above Tb using, for example, a rope for operation.

Next, use each rope UR and 5RXDR to pull up the entire 0PGW to the ground wire arm, and also lift the lowered part L inside the tower.
Lower d into the steel tower T. At this time, as seen in the figure, the base end of the lowered part Ld inside the tower will be targeted to some extent, but the curvature of this bend will be smaller than the curvature allowed for 0PGW (500ff1m or more). In order to prevent this from happening, a protector (not shown) with a structure that can bend up to a curvature of 500 mm, but not beyond that, should be extended from the come-along Cm that is used to attach the pulling lobe UR and sending rope SR. However, this protector protects the base end portion of the intra-tower pull-down portion Ld.

Below, intermediate supports 2 are the main related wire rolling equipment.
An example of the carrier 3 will be explained.

As shown in FIGS. 8 and 9, the intermediate support device 2 has a side upper frame lO1 upper frame 11 and a side auxiliary frame 12 formed into a gate shape, and is pulled into the gate shape. A first support part 13 for supporting the rope J and a second support part 14 for supporting the support rope S are separated and arranged in parallel at appropriate intervals in the lateral direction (horizontal direction), and are provided on the upper frame 11. It is used by being suspended from a steel tower via a hanging part 15.

Here, separating and paralleling in the lateral direction (horizontal direction) does not necessarily mean only when the support rope S and the tow rope J are located in the same horizontal plane; in short, the support rope S and the tow rope J This refers to a state in which the two are separated in the lateral direction (horizontal direction) to the extent that no contact occurs between them.

The first support portion 13 is formed on a main bracket 16 that protrudes from the side upper frame IO toward the inside of the portal, and is provided with a pair of front and rear lower support rollers 17.
17, upper regulating rollers 18 and 18, and a pair of left and right side regulating rollers 19a and 19b installed upright therein to form a support space 2.
1. The upper regulation roller 18 is shorter than the lower support roller 17,
There is a certain gap between the side regulating roller 19a and the passing gap 2.
2. Furthermore, in this example,
As described later, this is for the case where the intermediate supports 2 are used in a set of three, so only a pair of left and right side regulating rollers], 9a and 19b are provided, but in other examples described later. In the case of a device that is used alone, it should be provided in pairs at the front and rear as well.

The support space 21 in this first support part 13 is the passage gap 2
2, it has a sufficient structure to prevent derailment of the towing rope J, and the necessary safety is ensured. In addition, 1. If necessary, the first patent application filed in 1999
By employing a structure using a "connecting plate" in the wire drawing equipment shown in No. 09202, it is easy to close the passing gap 22 and create a completely closed space.

The second support part 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 attached to a support roller 25 for supporting the support rope S. By holding it with this holding clamp 24, the support rope S is allowed to move relative to the second support part 14 in the front-back direction, but the support rope S is provided in an overlapping state in the vertical and horizontal directions. The second support portion 14, that is, the intermediate support device 2 follows the movement of the support rope S in a semi-fixed state so that the support rope S can be supported.

By semi-fixing the support rope S to the second support part 14 in this way, the intermediate support 2 will always follow the movement of the support rope S due to changes in the catenary angle, etc., as will be described later. As a result, stable passage of the carrier 3 is ensured.

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

Figure 9 shows a hanging part 30 for hanging from a steel tower.
This is an example in which three intermediate supports 2 are used as a set via a base body 31 having a structure.

That is, three intermediate supports 2 are suspended from a base body 31 symmetrically in the traveling direction of the carrier 3, and the distance between each intermediate support 2 and the base body 31 is equal to the support rope S. 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, the central intermediate support 2b is suspended by a fixed suspension member 33, and the movable suspension member 32 is It is suspended from the base body 31 through a long hole 34 formed in the base body 31 and elongated in the front-rear direction.

Moreover, each intermediate supporter 2a-, 2b% 2a is
Fixed connecting members 35.35, -"°, fixed to each intermediate support 2a, 2b, 2a are mutually connected by hinges at their lower end sides, and each intermediate support 2a, 2b, The upper ends thereof are connected to each other via a telescopic connecting member 36 which hinges both ends to 2a.

As shown in FIG. 1O, the telescopic connecting member 36 consists of two sets of two rods 38.38 each having a connecting plate 37.37 at one end, and a plate 39.38 having a spring receiver at the other end.
39 are fixed, and each set of rods 38.38 is such that the spring receivers of the rods 38.38 of the other set pass through the plate 39, and the spring receivers are arranged between the plates 39, 39 with a compression spring 40 ( (not shown in FIG. 12). In other words, the elastic connecting member 36 is always urged in the direction of contraction by the compression spring 40, and this urging force is balanced with the weight of the intermediate supporter 2a, so that when the support rope S moves particularly upward, The intermediate support 2 can easily follow this movement.

With such a structure, the support rope S is directed by the arrow X.
As the support rope S moves as shown in FIG. Move in the direction of arrow β so that the result,
The distance between the intermediate support 2a and the base body 31 changes automatically.

In this way, using a plurality of intermediate supports 2 as a set and arranging each intermediate support 2 automatically on a curve corresponding to the catenary angle of the support rope S is a method of Since the catenary angle is divided into each intermediate support 2 and the angle of the support rope S with respect to each intermediate support 2 is small, the passage of the carrier 3 is thereby improved.

The intermediate support 63 shown in FIGS. 16 and 18 is used for lifting force in large valleys, and is basically the same as the intermediate support 2 described above, but the number of intermediate supports 63 shown in FIGS. Special efforts have been made in this respect.

Here, the lifting point refers to the steel tower T at the bottom of a valley, for example, as shown in Fig. 19, in the case of a valley where the steel towers T on both sides are at the top of the mountain and the steel towers T between them are at the bottom of the valley. , so called because there is always an upward force acting on the support rope S and the traction rope J at the steel tower T at the bottom of the valley.

The main differences of this intermediate supporter 63 will be explained below.

This intermediate support 63 is different from the above-mentioned one and is usually used alone, so it is arranged in pairs at the front and rear of the side regulating rollers 19a and 19b.

An auxiliary upper regulating roller 64 is provided on the first support part 13 by one inch, and the auxiliary upper regulating roller 64 regulates the pulling rope J that happens to pass upward through the passing gap 22. Incidentally, when the carrier 3 passes, the traction rope J is forced by the connecting portion 43 and naturally returns to the support space 21.

As shown in FIG. 17, on the premise that the support rope S is in the state shown in FIG.
An auxiliary support roller 65 is also provided above the support rope S. Further, as a result of this, a difference in level occurs between the support rope S and the guide members 66 and 66 are provided as a pair at the front and rear in order to eliminate this difference in level. This guide member 66 is made by combining two parts into a conical shape, and is adapted to loosely cover the support rope S. Further, this guide member 66 is attached to the holding clamp 24 via a connecting member 67, and is configured to rotate as indicated by an arrow U in accordance with the movement of the support rope S.

A fixing eye ring 68 is attached to both the side upper and side auxiliary frames 10.12, and by fixing to the steel tower via this fixing eye ring 68, the intermediate support 63 itself is supported. The rope S prevents it from being pulled up.

As shown in FIGS. 11 and 12, the iron carrier 3 consists of a carrier body 3a and a carrier 3b. Connecting part 43 for connecting and carrier 3b for supporting electric wires
A hanging part 46 for suspending the
However, the traveling portion 42 and the connecting portion 43 are connected to both the first and second supporting portions 13 .
They are separated and arranged in parallel in the horizontal direction at substantially the same intervals as the intervals between the 14.

The running section 42 includes a pair of running rollers 47.4, each pair of front and back and upper and lower sides.
7,---m-, is equipped with a pair of front and rear side rollers 48, 48 and an opening/closing frame 49, and a closed space 50 surrounded and formed by the running roller 47, side rollers 48, and opening/closing frame 49. It is a unit-shaped structure with

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

The opening/closing frame 49 has a closed space 50 located at the second intermediate support 2.
This is to allow the support rope S to pass through the support part 14, and also to allow the support rope S to be inserted into the closed space 50 to allow the carrier 3 to pass through.
It is also a door for setting the support rope S.

Specifically, the opening/closing frame 49 is shaped like a pantograph with pairs around the four corners, and a rod-shaped locking means 51 usually engages with an engagement recess 52 formed at the lower end of the opening/closing frame 49. However, if the locking means 51 is rotated in the direction of arrow Y shown in FIG.
The state J shown by the imaginary line in the figure is made to open.

When passing through the intermediate supporter 2, the locking means 51 comes into contact with the ship-shaped lock release means 26 provided on the intermediate supporter 2 and is pushed downward in the relationship shown in FIG. The opening/closing frame 49 hits the auxiliary bracket 23 of the second support part 14 in this state and opens, allowing passage. In addition, when putting the support rope S into the closed space 50, the locking and opening/closing frames 4 are manually unlocked.
9 opening and closing are performed.

The connecting portion 43 is provided at the other end of a connecting arm 53 which has one end hingedly connected to the upper end of the traveling portion 42 and extends laterally, and is a conical loose portion as shown in FIG. A cylindrical holding part 55 is provided between the parts 54 and 54 which are symmetrical in the front and rear, and the whole part has a spindle shape.

As shown in FIG. 15, the loose portion 54 includes a pair of divided pieces 56.5 each having bracket portions 56b and 57b.
7, one divided piece 56 is fixed to the connecting arm 53 via a bracket part 56b, while the other divided piece 57 is fixed to one divided piece 56 through the bracket part 57b. It is designed to be detachable, and a loose hole 58 having an inner diameter slightly larger than the outer diameter of the pulling rope J is formed when the two divided pieces 56 and 57 are combined. Note that the holding portion 55 is not shown in FIG. 15.

As shown in FIG. 14, the holding part 55 is divided into two parts with a pin 59 as an axis, and the lock bolt 6
By tightening the rope 0, the towing rope J is held firmly in the holding hole 61, but it is separated from the loose part 54.54, and by firmly holding the towing rope J passed through the loose part 54.54. It is designed to fit between both loose parts 54 and 54.

Therefore, although the connecting portion 43 is fixed to the towing rope J in the front-rear direction, it is free to rotate with respect to the towing rope J. That is, the connecting portion 43 is connected to the traction rope J by a hinge connection.

A towing rope J is attached to the tip of the connecting arm 53, which has one end hinged to the upper end of the running section 42 and extends laterally.
The structure in which the connecting part 43 is hingedly connected to the tow rope J does not require the running part 42 to bear the tension load applied via the tow rope J, and as a result, the required structural strength is reduced to a fraction of the required structural strength. This brings about the advantage that the weight of the carrier 3 can be significantly reduced, and also brings about the advantage that reversing of the carrier 3 during transportation can be reliably prevented and the wire extending work can be made more stable.

The hanging part 46 is attached to the running part 42 via the hanging bracket 62, and the hanging part 46 is attached to the running part 42 by a
It is designed to rotate as indicated by arrow Z in the figure. Therefore, even if the traveling portion 42 is inclined according to the inclination state of the support rope S, the hanging portion 46 can always maintain a vertical state.

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

That is, by opening the opening/closing frame 49 as described above, the running part 42 can pass through the second support part 14, and the passage gap 2 can pass through the first support part 13.
By passing the connecting arm 53 through 2, the connecting portion 43 can pass through.

The carrier 3b, as shown in FIGS. 20 to 22,
Connecting part 71, pair of doors 72, 72. 3 carrying rollers 7
3.73.73, a locking device 74 and a gripping body 100 are provided.

The connecting part 71 consists of a connecting lever 77 to which an eye ring 76 is attached for connecting the hanging rope 45 interposed between the carrier body 3a and a mounting part 78 to which the door 72.72 is attached. is fitted into the guide cylinder 79 of the mounting portion 78 in a sliding state, and is adapted to slide relative to the mounting portion 78 as shown by the arrow ①. and,
This connection lever 77 usually consists of a flange-shaped lock claw release body 80 integrally formed on the connection lever 77 and a nut-shaped receiver body 8 attached to the lower end of the mounting part 78.
1 and is pulled in the direction of arrow M by a spring 82 that is stretched between the two.

The door 72.72 is attached to the mounting portion 78 as described above, but specifically, it is attached with bolts and nuts 83, so that it can be rotated as shown by the arrow N. .

The supporting rollers 73 have a gentle truncated conical shape, and the two at the front and rear are fixed to one door 72, and one of the rollers facing different directions is fixed to the other door 72, thereby forming a supporting groove 84.
is formed. Regarding the inclination angle of the carrying roller 73,
The load of the electric wire W acts to open the door 72.72, and if it is too large, the force to open the door 72.72 becomes too large, and the door lock of the locking device 74, which will be explained later, There is a relationship in that the slideability of the frame 85 is deteriorated.

The locking device 74 includes four rollers 86.86, ----m- provided on the side surfaces in pairs on the upper and lower sides, and two rollers 87.87 provided on the front and rear surfaces, one pair each on the front and rear surfaces. - A door lock frame 85 combined into a rectangular frame shape, a pair of lock claws 89, 89, and a pair of upper stoppers respectively provided on the door 72, 72. 90.90 and a pair of lower stoppers 91.91.

The door lock frame 85 is arranged to surround the door 72, 72, and is slidable in the direction of arrow Q (vertical direction), and the upper and lower stoppers 90, 90, 91, 91 limit the sliding limit. The lower limit is now regulated. Further, the lock claws 89 and 89 are attached to the mounting portion 78 together with the door 72 and 72 by the aforementioned bolts and nuts 83, and are configured to rotate as shown by the arrow α, and each is supported by a torsion spring (not shown). is biased in the direction of arrow V.

In addition, 92 in FIG. 22 is a regulation roll for preventing the electric wire from touching the corner of the door 72, 72.

The gripping body 100 has a groove 101 lined with a material having a large coefficient of friction, such as a rubber material, and the groove 101 can be pressed against the electric wire W on the support groove 84. There is.

That is, the gripping body 100 has the gripping body 100 and the holding groove 84.
It is attached to the mounting part 78 so that the distance between the wire W and the wire W is a certain amount larger than the diameter of the wire W. As shown in FIG.
When the upper electric wire W becomes a mountain, it is pressed against the electric wire W and gripped (FIG. 24).

Of course, the holding structure using the gripping body 100 is such that by gripping the electric wire W for each carrier 3, it is possible to prevent the electric wire W from flowing downward on a steep slope, and also to prevent the electric wire W from flowing downward on a steep slope.
The purpose is to prevent the weight from concentrating on the tip of the carrier 3, and also to equalize the "sub-dip" between the carriers 3. In other words, by freely moving the carrier 3b relative to the wire W until a certain "sub-dip" occurs, and then gripping the wire W when a certain "sub-dip" occurs, a uniform "sub-dip" is created between each carrier 3. It is something that causes

In this way, "the purpose of making the sub-dip j uniform is to maintain the posture of each carrier 3 in a vertical state and to
This is to improve the passage of the material.

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

That is, as described above, when the carrier 3 is reversed by pulling up the electric wire W and a tensile force of more than a certain level is applied to the hanging rope 75, the connection lever 77 is pulled up by the spring 8.
2 in the direction opposite to the direction of arrow M, and rotates the lock claw release body 80 or the lock claws 89, 89 to the state shown in FIG. Then, the door lock frame 85, which has lost its support from the lock claws 89.89, is moved to the stopper 90.9.
As a result, the rollers 86.86 of the door lock frame 85 move against the door 72.7.
2, the door 72.72 is lowered from the position of the bolt nut 83, which is the rotational fulcrum of the carrier 72, and the door 72, 72 receives the force from the load of the electric wire and opens under its own weight as shown in FIG. 17 is released from the electric wire W.

〔Effect of the invention〕

Since the conveyance line removal according to the present invention is as described above, it has the following effects.

(a) Since the support rope and the traction rope are separated and arranged in parallel in the horizontal direction, there is no occurrence of the phenomenon of contact between the support rope and the traction rope, and smoother and safer wire extension can be achieved. Further, the conveying wire extension method can be easily applied to places where a pulling force acts on the support rope or the traction rope, such as in a large valley.

(b) Each electric wire is transported independently, and the wires that reach the relevant tension section are sequentially boarded up or strung, and the subsequent wires are transported and the carriers are collected, so simply collecting the carriers is carried out. Not only can the work be avoided as a factor increasing the construction period, but also the time for board work and even the tension work can be included in the transportation time, thereby greatly shortening the construction period.

(C) By combining the gripping of the electric wire with the carrier, no tension greater than the weight of the wire between the carriers will be generated on the wire, no matter how steep the slope, and ideal low-tension extension can be achieved. Lines can be realized. Furthermore, since the grip also works to prevent the electric wire from rotating, it is possible to achieve even higher quality.

(d) By combining the automatic release of the wires from the carrier by inverting the carrier by pulling it up as the wire is raised, and opening the door of the carrier by utilizing the inverted state of the carrier, the time required for this opening work can be reduced. and saves labor,
It is possible to shorten the construction period and streamline the construction work.

[Brief explanation of drawings]

Figure 1 is a diagram of the extension of the support rope and traction/rope, Figure 2 is a diagram of the conveyance of the electric wire, Figure 3 is a diagram of the connection of the electric wire to the terminal carrier, Figures 4 and 5. Figure 6 is a diagram showing the state of wire lifting, Figure 6 is a diagram showing the state of transport and recovery of the carrier after raising the wire, Figure 7 is a diagram equivalent to Figure 4 for 0PGW, and Figure 8 is a diagram of the intermediate supporter. FIG. 9 is a schematic side view including a partial cross section of the intermediate supports assembled as a set; FIG. 10 is a partial schematic perspective view of the telescopic connecting member; FIG. 11 is a schematic side view including a partial cross section; A schematic side view of the carrier; FIG. 12 is a schematic side view of the carrier as seen from the direction of arrow X■ in FIG. 11; FIG. A plan view, FIG. 14 is a schematic cross section along the arrow X-XIV line in FIG. 13, FIG. 15 is a schematic cross section along the arrow xv-xv line in FIG. 13, and FIG. , a schematic side view including a partial cross section of an intermediate supporter according to another embodiment, FIG. 17 is a schematic sectional view of the second support part in FIG. 16, and FIG. 18 is an arrow indicated in FIG. 16. 21 is a schematic side view including a partial cross section of the intermediate support device as viewed from the X direction; FIG. The figure is a schematic perspective view of the gripping body, Figure 22 is a schematic side view including a partial cross section seen from the direction of arrow XX■ in Figure 20, and Figure 23 is an inverted holding state. A schematic side view of the carrier, and FIG. 24 is a side view schematically showing a state in which the electric wire is held by the holding body. 2-..."Intermediate supporter 3...Carrier S...Support rope J...-Tow rope W...Electric wire T-... ... - Steel tower Figure 12 Figure 14 Figure 15 Figure 9 0 Figure 18 Figure 19 Figure 23

Claims (6)

[Claims] (1) In the conveyance and extension method, in which the wire is carried and extended by a carrier that is towed in a chain by a tow rope and runs on a support rope, the tow rope and support rope are separated and paralleled in the horizontal direction. A conveyance line extension method characterized by the following: (2) In the conveyor extension method, in which electric wires are carried and extended by a carrier that is towed in a daisy chain shape with a tow rope and runs on a support rope, the electric wires are cut in advance to a length corresponding to the wire tension section. With the front and rear ends held by terminal carriers, and the intermediate part carried by multiple intermediate carriers, each wire is transported independently with an appropriate distance between them, and the wires are When the line section is reached, the carriers for both terminals are disconnected, the wires are automatically released from the intermediate carrier, and the wires released from the intermediate carrier are moved to the corresponding tower arms to raise the board or raise the wire. While tensioning the wire, wind up the tow rope and collect each empty carrier, bring the next wire to the relevant wire section, perform the same work on this wire as the previous wire, and continue onward. A conveying wire extension method characterized in that the same work for each electric wire is repeated until the wire extension is completed for the entire line extension section. (3), the conveying wire extension method described in claim (1) and claim (2).
) A conveyance line extension method that is a combination of the conveyance line extension methods described in ). (4) The wire transport method according to any one of claims (1) to (3), characterized in that the carrier grips the electric wire. (5) Reverse the carrier by pulling up the electric wire,
Claims (1) to (4), characterized in that the electric wire is automatically released from being held by the carrier by opening the door of the carrier by utilizing the inverted state of the carrier. Conveyance line extension method. (6) When the rear end of the wire reaches the relevant wire section, attach ropes for pulling up the wire to the rear end of the wire at the steel tower at the near end of the wire section, and disconnect the terminal carrier from the wire. Wind up the towing rope until the front end reaches the tower at the front end of the wire section, and then, when the front end of the wire reaches the tower at the front end, attach ropes for pulling up the wire to the front end of the wire at this tower. At the same time, the terminal carrier is separated from the electric wire, and the electric wire is pulled up using ropes for pulling up. .