JP2003189431A - Old and new line bundle-stringing method and hanger removing device therefor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that a worker is forced to work at a high altitude in removing a cable hanger and to bear a great burden, in either case where the worker performs the work by manual work while riding on a working bucket of a vehicle for high lift work or that the worker rides on a seat-type nacelle hung from a supporting wire and performs removing the work while moving the nacelle along the supporting wire by himself/herself. <P>SOLUTION: A towrope is provided on this hanger removing device which comes into roughly sliding contact with the supporting wire and comprises a releasing hook having an inclination which flips up and releases a supporting wire grabbing the bending part of the hanger from a lower position. The worker on the ground removes the cable hanger provided on the supporting wire by having the towrope and shifting it between utility poles. This old and new line bundle-stringing method can be thereby performed, in which an existing line is introduced into a new cable connected to a rear part of the removing device and in a spiral hanger which holds it and simultaneously surrounds the supporting wire. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tool used for construction or extension of a communication line, and particularly to a new cable (a metal cable) suspended from a support line (messenger wire). It relates to a device used in the process of removing the existing cable hanger in the work of adding additional cables such as metal cables and optical fiber cables, or in the work of removing existing wires and replacing them with new cables.

[0002]

2. Description of the Related Art Due to changes in social conditions, there is an urgent need to build a large-capacity information and communication network. As one of the measures, the construction of installing a fiber optic cable in addition to a conventional metal cable is being promoted. ing. Metal cables do not apply excessive tension to the inside of the cable body at a predetermined interval with a cable hanger on a support wire made of steel stranded wire that can withstand the tension required to secure the required ground clearance between each pole of an aerial structure. Although it is installed in a state, in order to install a new cable along with this metal cable, it is necessary to take out the existing wire from the cable hanger, arrange both in parallel, and suspend it again with a new hanger.

Therefore, it is necessary to remove the old cable hanger that holds the existing wire as a single wire from the support wire, but the cable hanger holds the existing wire and secures a fixed position on the support wire. This was not an easy task because the support wires were firmly gripped by the bent portions at both ends to be semi-permanently locked, and the position of the support wires was several meters above the ground. Generally, an aerial work vehicle is used or a simple gondola is placed on a support line, and a worker gets in and removes cable hangers between utility poles one by one and moves.

[0004]

Various problems arise in the work in the above-mentioned situation.
Almost all communication lines are installed on utility poles near the road, so it is easy to place work vehicles at high places, but the working time on roads with heavy traffic is naturally limited. Even on rural roads where there are few time constraints, the number of cable hangers that can be reached using the extension and contraction of the bucket arm is limited even if the outrigger is prepared for the work at one location and the work begins. However, it is a very inefficient work considering the equipment and personnel to be input. In addition, even when a simple gondola is mounted, it is a dangerous work at a high place, and it was a construction method that cannot be used with an aging support line.

[0005]

[Means for Solving the Problems] In order to solve the above problems, the present invention has developed a construction method mainly for work from the ground and equipment used therefor. The outline of the construction method of the present application is to mount a cable hanger removal device on a support wire, run it by traction from above the ground between the pole poles, and push up the part where the bending part that holds the support wire at both ends of the hanger grips the support wire. It is released, bounced off, and moved sequentially to the end of the span. A new cable, which is newly held by a spiral hanger, is connected to the rear end of the removal device, and the support wire is also enclosed in this spiral hanger, so when the removal device reaches the span end. The existing line and the new cable will be attached to the support line by a spiral hanger. The outline of the equipment is that the support wire is clamped from above and below by a roller, and is supported by the support wire riding part, the release claw part continuous to the front part, and one side of the support wire riding part is hingedly connected. It consists of a cable guide that can be opened and guides the existing wire that hangs back from the hanger and hangs backward. In addition, the cable guide part will be provided with a tow rope for moving this device within the span and a connecting part for the original purpose of a new cable for adjoining and a spiral hanger.
Release claws L and S are arranged at the front end of the release claw part with their front and rear positions displaced, and the release claws cause the bent part of the hanger to be released and complete the separation of the hanger from the support line. In the present application, this action of the nail is the most important one and forms the center of the invention.

[0006]

EXAMPLES Examples of the present application will be shown. First of all, the hanger removing device, which is the equipment, guides the existing wire into the succeeding spiral hanger at a position below the supporting wire mounting part 4 and the supporting wire mounting part 4 which is continuous with the release claw part 5 located at the leading edge. The cable guide portion 6 is a main constituent member.

Before describing the structure of the release claw 5, the structure of the cable hanger H will be described. As shown in FIG. 16, the cable hanger H is formed of a steel wire rod, the middle portion is bent into a substantially U shape, and a resin protective piece is superposed on the U shape bottom and twisted 90 degrees to form a U shape bottom. The cable C to be placed on is parallel to the support line W. Both ends of the hanger H are bent to grip the support wire W. The supporting wire gripping bent portions at both ends have similar shapes but are not the same,
They are bent in opposite directions, and one has a deep bending angle and the other has a shallow bending angle. This is in consideration of attachment to and detachment from the support wire W. At the time of attachment, the deeper bend is first fitted to the support wire W, and then the shallower one is fitted while resisting the elasticity of the steel wire. The elastic force of the steel wire holds the fixed position on the support wire W. In addition, the supporting wire gripping bent portion of the hanger H having a deep bending angle has a role of preventing the hanger from moving due to the sliding of the supporting wire from vibration due to wind pressure on a sloping ground. By installing a bendable part, it prevents movement and sagging of the cable due to a long-term natural phenomenon. Further, since the support wire gripping bent portions are bent in mutually opposite directions, when one of the support wires W extends from the right direction to the support wire W in the extending direction of the support wire W, the other one starts from the left side. It is for locking. The device of the present application is established by first releasing the shallow bend of the cable hanger H and using the elastic force generated at that time to cause the other bend to bounce and unlock the support line.

The release claw portion 5 forms a generally plow shape as a whole, and is wide and has an approximately arcuate vertical inclination that is gradually higher than the lower surface position of the support line W, and an intermediate position between the support line W and the release claw L. Further, it has a similar vertical inclination and is inclined substantially horizontally toward the center of the support line, and the support line W is provided between the release claw S and the both claws with a sharp tip.
Is provided with a guide groove 51 for substantially slidingly fitting. Further, the release claw L is provided with a guide projection 52 on its inclined surface. The guide protrusion 52 is about 45 in the extending direction of the support wire W.
It is formed with a substantially horizontal inclination of about one degree. Release claws L and S
Has a difference in length, and there is a difference of about 10 mm between the tip of the wide claw L and the tip of the pointed claw S, and L is longer.

The release condition of the hanger H by the release claw portion 5 will be described with reference to FIGS. 7 to 13. When the release claw 5 reaches the hanger H by being pulled from the ground, the release claw L scoops up the shallowly bent end H1. (Figs. 7 and 8) End H
1 is a slope 53 of the guide protrusion 52 that climbs on the slope of the release claw L.
It moves in the direction in which the grip on the support wire W is released (upward in the drawing) while being pushed by, and a gap is formed between the bent portion H2 and the side portion of the support wire. (FIGS. 9 and 10) The reason why there is a difference between the release claw L and the release claw S is to obtain a time difference for the release claw S to enter after the gap on the side of the support line is formed. Eventually, when the release claw S arrives, it naturally enters into this gap, and the side hypotenuse 54 further spreads the bent portion H2 against the elasticity of the steel wire rod, and the end portion H1 releases the grip on the support wire W and releases it. Riding on the claw S (FIGS. 11 and 12) and finally reaching the end of the side hypotenuse 54 (FIG. 13)
When it is disengaged from the release claw S, the elastic resistance accumulated in the steel wire rod is released at once, and the bent portion at the other end still locked to the support wire W also disengages from the support wire W by its reaction.

A semi-cylindrical guide tube 55 is connected to the open portion of the release claw portion 5 on an extension line of the guide groove 51 with its open portion facing downward.
A fin portion 56 is provided on the upper rear side of the guide cylinder 55. Therefore,
The fin 56 of the release claw 5 connects the support wire riding unit 4 in series. The support line riding section 4 is configured by pivotally supporting the pair of front and rear riding rollers 11 that sandwich the supporting wire W from above and below, and the guide rollers 21 that are arranged so as to face the lower position of the pair of riding rollers 3 on the riding frame section 1. To do. One side of the space between the rollers 11 and 21 can be opened, and the support line W is located on both sides of the roller 1 from this opening.
Insert between 1 and 21. The guide roller 21 has a support line
In order to change the sliding contact resistance with respect to, the mounting frame is pivotally supported on a separate moving frame 2 that can move in the vertical direction,
The vertical adjustment of the moving frame 2 is performed by the vertical adjustment screw 33 of a bolt 32 provided at a right angle to the shaft head 31 protruding outside the riding frame 1. The sliding contact resistance with respect to the supporting wire W is adjustable in order to surely bring the release claw 5 into contact with the bent end of the hanger end, or in the gap formed by the supporting wire W and the bent portion. It is a means to insert it accurately.
That is, if the support wire W is tightly sandwiched between the upper and lower rollers, the tip of the claw will contact the hanger end without any problem, or will enter the gap, but the tension during pulling will be too large, and the support wire and other facilities It is possible to damage the device.
If the grip is too loose, the behavior of the claws will not be stable. Therefore, it will be adjusted appropriately depending on the condition of the construction span.

A hinge 12 is connected to one end of a cable guide portion 6 at the lower end of the riding frame portion 1. The cable guide portion 6 is provided with a receiving roller 61 for guiding the existing wire C, a connecting portion 62, an auxiliary plate portion 63, and a weight 64 at the lower center. The receiving roller 61 can be moved up and down by making the frame shaft hole of the cable guide portion 6 an elongated hole, connecting the shaft to the lower portion of the sub-frame of the receiving roller 61, and rotating a knob 67 screwed to the shaft. The receiving roller 61 is lowered when a thick cable is used to avoid interference with the moving frame 2. The other end of the cable guide portion 6 is bridged with the riding frame portion 1 by a connecting plate 65 so that it can be opened and closed, and is closed by the fixing screw 13.

A cover frame 7 is provided on the riding frame portion 1, an upper cover 81 of a cover 8 is covered on the cover frame 7, and a lower cover 8 is provided under the upper cover 81.
2 are connected by a hook-and-loop fastener 83, the whole is surrounded, and the detached hanger H is housed in the cover 8.

FIG. 5 shows another embodiment of the hanger removing device. A hinge 57 is provided on one side of the guide cylinder 55 of the release claw 5, and a screw 58 is provided on the other side thereof to open and close the guide cylinder. And the support wire W is fitted into the guide cylinder 55,
The cable guide portion 6 has a structure in which a substantially C-shaped ring is provided, a connecting portion 62 is provided at the lower portion of the ring, and a tow rope R is provided at the connecting portion 62 via a shackle. Since the existing wire C is placed on the ring, the attitude of the hanger removing device is controlled by the weight of the existing wire C. Although the roller 59 is provided behind the guide cylinder 55, it may not be provided.

FIG. 6 shows still another embodiment of the hanger removing device, in which one end of the guide groove 51, which guides the upper surface of the support wire W by substantially sliding contact, has a tip above the lower surface of the support wire. A release claw L having a guide projection 52 is provided at a position outside the upper surface of the sloped portion, and a release claw S having a sharpened tip is continuously arranged on the other side, which is inclined from the middle position of the support line to the upper surface. The release claw portion 5 is configured by being provided on the release claw portion 5 via a U-shaped frame 60, and the telescopic operation rod B is connected to the frame 60. The workability is further improved by providing the tow rope at the tip of the operation rod B. As described above, in the above-mentioned one, the operator has to move up and down to the utility pole in order to remove the detaching device from the support wire W for each distance between the utility poles.
It can be removed from the support wire W by raising it, and can be easily placed on the support wire W with the next span. Therefore, it is possible to continue the extension of the next span, which improves efficiency, reduces work at high places, and reliably reduces the occurrence of crash accidents. Further, in the present embodiment, which is used by installing it on the operation rod B, when the installation directions of the support wire gripping bent portions of both ends of the cable hanger H are opposite at a part between the pole poles, another worker is used. It is possible to partially remove the cable hanger H by operation,
The hanger removing device A described above enables continuous progress.

FIG. 14 is a perspective view of the cover 8 of the present application. The cover 8 is divided into an upper cover 81 and a lower cover 82, and the front and rear of the cover (the insertion direction of the support wire and the existing wire) are separated by a surface fastener. The tow rope R is pulled out from the gap and used. The material is made of transparent vinyl and is connected by a hook-and-loop fastener 83 at approximately the center, and the detached cable hanger H is received and stored in the lower cover 82. Although the lower cover 82 has the same shape as the upper cover 81 in the drawing, in addition to this, the lower side of the lower cover 82 is opened, a string is inserted around the lower side, and the string is squeezed. It may be closed in. In this case, the cable hanger H stored in the lower cover 82 can be collected by unraveling and opening the cord.

FIG. 15 is a perspective view of another embodiment of the cover 8 of the present invention, which is divided into an upper cover 81 and a lower cover 82.
It is made of transparent vinyl, and differs from the above in that it is of a type in which the lower cover 83 is lengthened so that the cable hangers H that hang down to the ground and sequentially fall are collected.

The present application can complete the new and old wire bundle erection method by using the above-mentioned hanger removing device. FIG. 1 shows an outline of the construction method, in which the plow-shaped release claw portion 5 is moved in a state of substantially sliding contact from the upper surface of the support wire W stretched between the electric poles P to both side surfaces thereof, and the support wire W and its lower part. When the release claws L and S come into contact with the cable hanger H that connects the existing wire C at the position, the supporting wire gripping bent portion H2 of the cable hanger H is caused to release the grip, and the existing wire C is held in the hug state. Is released by the hanger removing device A, and at the same time, a new cable F connected to the position of the rear part of the release claw portion 5 of the hanger removing device A and the existing wire C that holds the supporting cable W and also surrounds the supporting wire W at the same time. And the removal of the cable hanger H between the construction spans is completed, the installation of the existing wire C and the new cable F by the spiral hanger SH is completed at the same time.

A method of using the hanger removing device of the present application in the construction method will be described with reference to FIGS. 1 to 4. The support wire mounting portion 4 is mounted on the support wire W at the time of the utility pole P of the device of the present application. First, as shown in FIG. 3, the fixing screw 13 of the connecting plate 65 is mounted.
Is loosened to open the connecting plate 65, and the adjusting screw 33 is rotated to widen the space between the rollers 11 and 21. Then, the supporting wire W is fitted between the rollers 11 and 21 of the mounting portion, and the adjusting screw 33 is rotated again to clamp the supporting wire W from above and below. Then, the existing wire C is received in the cable guide portion 6, the open portion is closed by the connecting plate 65, and fixed by the fixing screw 13. At this time, if the existing line C is thick, the receiving roller 6
The knob 67 at the lower part of 1 is rotated to lower the receiving roller 61 to avoid interference with the upper moving frame 2. Subsequently, the tow rope R is attached to the tow rope attachment portion 62 on the front side (the release claw portion 5 side), and the new cable F and the tip of the spiral hanger SH are attached to the rear connection portion 66 directly or via the leading ring, and The support line W and the existing line C are also enclosed in the spiral hanger SH at the same time. Next, the cover frame 7 provided on the support wire riding section 4 is covered with the upper cover 81, and the upper cover 8 is attached.
The lower cover 82 is attached to the lower part of the unit 1 by the hook-and-loop fastener 83, and the setting is completed. The worker is the cover 8
When moving between the electric poles P by holding the tow rope R that is pulled out from the gap closed by the surface fastener, the cable hangers H between the electric poles P are sequentially removed, and the detached cable hangers H are received in the lower cover 82. Stop and store,
After that, the supporting wire W, the existing wire C, and the new cable F that are suspended by the spiral hanger SH are completed. As described above, the hanger removing device is reattached for each pole distance.

[0019]

As described above, by using the hanger removing device of the present application, the worker can remove the cable hanger by simply moving between the utility poles by holding the tow rope from the ground and removing the old and new lines. Bundled wire extension is possible. In addition, workers are freed from long hours of high-altitude work,
The work is done from the ground, the burden on the operator is reduced, and efficient and safe work can be performed. Further, in the past, the risk of a crash from a high place was always present, but in the present application, it is only necessary to work at a high place at the time of mounting / removing the device on the side of a utility pole, so a fall disaster is surely reduced.

[Brief description of drawings]

FIG. 1 is a schematic front view of the method of the present application.

FIG. 2 is a perspective view of the cable hanger removing device of the present application.

FIG. 3 is an open side view of the cable hanger removing device of the present application.

FIG. 4 is a front view of a usage state of the cable hanger removing device of the present application.

FIG. 5 is a perspective view of another embodiment of the cable hanger removing device of the present application.

FIG. 6 is a perspective view of still another embodiment of the cable hanger removing device of the present application.

FIG. 7 is an explanatory diagram of a cable hanger release state by the release claw portion of the present application.

FIG. 8 is a front view of FIG.

FIG. 9 is an explanatory diagram of a cable hanger release state by the release claw portion of the present application.

FIG. 10 is a front view of FIG.

FIG. 11 is an explanatory diagram of a cable hanger release state by the release claw portion of the present application.

FIG. 12 is a front view of FIG. 11.

FIG. 13 is an explanatory diagram of a cable hanger release state by the release claw portion of the present application.

FIG. 14 is a perspective view of the cover of the present application.

FIG. 15 is a perspective view of another embodiment of the cover of the present application.

FIG. 16 is a side view of the cable hanger.

[Explanation of symbols]

1 Frame frame 2 moving frames 3 axes 4 Support line riding section 5 Release claw 6 Cable guide section 7 Cover frame 8 covers 11 mounting rollers 12 hinges 13 fixing screws 21 Guide roller 31 shaft head 32 volts 33 Adjustment screw 51 guide groove 52 Guide protrusion 53 hypotenuse 54 side hypotenuse 55 Guide tube 56 fins 57 Hinge 58 screw part 59 roller 60 U-shaped frame 61 Receiver roller 62 Tow rope attachment 63 Auxiliary plate 64 weights 65 Connection plate 66 Connection 67 control 81 Upper cover 82 Lower cover 83 hook-and-loop fastener A hanger removal device B control rod C existing line F New cable H cable hanger H1 end H2 bend L release claw S release claw SH spiral hanger P utility pole R tow rope W support line

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hitoshi Inoue             2 Wisteria at 1573, Kamitakino, Takino-cho, Kato-gun, Hyogo Prefecture             Idenko Corporation F-term (reference) 5G367 GA03 GB01 GB03 GC02

Claims (4)

[Claims] 1. A release hook in the form of a plow is moved in a state of substantially sliding contact from the upper surface of a stretched support wire to both side surfaces, and the release hook is brought into contact with a hanger that connects the support wire and an existing wire below the support wire. This causes the supporting wire gripping bent portion of the hanger to be released, and the existing wire is gradually released from the holding state, and at the same time, the new cable connected to the position of the rear part of the release claw and the supporting wire are held. Introducing an existing line into the spiral hanger that also surrounds it at the same time, and if the removal of the hanger in the construction span is completed, at the same time the existing line by the spiral hanger and the overhead line of the new cable are completed. Construction method. 2. A hanger removing device characterized in that a tip of the hanger is slidably contacted with a supporting wire, and a release claw is provided at both sides of the supporting wire, the release claw having an inclination for flipping up and releasing the supporting wire gripping bent portion of the hanger from below. . 3. A release claw L having a tip on one side of a guide groove which is slidably in contact with the upper surface of the support wire and guides the surface from the lower surface of the support wire toward the upper surface, and has a guide projection on the outer surface of the inclined portion. On the other side, the release claws that are inclined from the middle position of the support line to the upper surface and have sharpened tips are continuously arranged to form the release claws. A guide cylinder having a semi-cylindrical shape is continuously connected to the guide cylinder, and a support wire riding portion having a roller for riding on a support wire and a cable guide portion for guiding an existing wire are continuously provided. The hanger removing device according to claim 2, further comprising a connecting portion between the new cable and the spiral hanger. 4. A release claw L having a tip on one side of a guide groove that guides in a substantially slidable contact with the upper surface of the support wire, the tip being inclined from the lower surface of the support wire toward the upper surface, and having a guide protrusion at the outer surface of the inclined portion. On the other side, a release claw S that is inclined from the middle position of the support line to the upper surface and has a sharpened tip is continuously arranged to form a release claw, and the operation rod is connected to the release claw. The hanger removing device according to claim 2, which is characterized in that.