JP3249979B2 - Construction method and construction equipment of spiral support for hanging long span cable - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for installing a spiral support for suspending a cable on a messenger wire stretched between long-span utility poles.

[0002]

2. Description of the Related Art Conventionally, as a method of suspending and fixing a cable to a messenger wire, a method using a hanger system 200 as shown in FIG. 9 is often used. The procedure is, as shown in FIG.
First, the wheel & pinion 228 is attached to the messenger wire 202 stretched in advance. After that, the towing line 206 is connected to the winch 203 through the wheel & pinion 228,
The cable 219 connected to 6 is wound up and drawn between utility poles. Thereafter, the hangers 208... 208 of FIG. 9 are attached every 50 to 60 cm while removing the wheel 228.
However, since all of these operations are performed by suspending the worker 204 between the utility poles 201a and 201b (called suspension riding work), the worker's skill is required and the construction takes a dangerous time. Was. Also during work, the wheel 228
There have been accidents that have fallen and injured pedestrians, and improvements to this have been strongly desired.

[0003] In addition, when the cable is attached by the hanger, an external factor acts to cause the cable to fall off or to be displaced, thereby impairing proper support of the cable and adversely affecting the characteristics of the cable in some cases.

The present invention is based on Japanese Patent Application Laid-Open No. 9-701, filed earlier.
Since the construction method of Japanese Patent Publication No. 17 was directed to a short span, the construction method of a helical support for suspending a cable on a messenger wire stretched between long-span utility poles by improving this construction method and It relates to a construction device.

[0005]

SUMMARY OF THE INVENTION In view of the above circumstances, the present invention is a safety method that does not require hanging work, has no drop-off or lateral displacement, and can be used for reversing a spiral support at the time of construction.
The crossing phenomenon between the rope and the messenger wire can be completely prevented, so that stable construction can be performed, and the joining work of the tip of the rope and the spiral support with the electric wire inside can be simplified about 200m. It is an object of the present invention to provide a method and an apparatus for constructing a spiral support for hanging a long span cable.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a method for constructing a spiral support for suspending a cable on a messenger wire stretched between utility poles having a long span of about 200 m. A procedure in which one end of the spiral support for hanging the cable and one end of the tow rope are connected to a leading pulley having a weight suspended below at one of the power poles, and the sum of the outer diameter of the messenger wire and the outer diameter of the cable. While winding a helical support having a large inner diameter around the messenger wire and the pulling line, a weight is provided below the tip of the pulling line, and tension is applied to the electric self-transporter holding the messenger wire from above and below the messenger wire by rollers. (I) a procedure for transferring the spiral support to the other telephone pole, and a joint between the other end of the spiral support and one end of the next spiral support connected to the other. And a step of fixing the helical support to the messenger wire with the fixing device when the electric self-transporter and the leading pulley reach the other power pole. And a procedure of pulling a cable attached to the tip of the cable with the current carrying wire inside, and pulling the cable into the spiral support, so that the cable can be laid only near the power pole. And a device for constructing a spiral support for the same.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a schematic side view showing an embodiment of a method for installing a spiral support for hanging a cable according to the present invention, and FIG. 2 is a schematic view showing an embodiment of the connection and connection of the spiral support. It is an exploded side view. FIG. 3A is a side view showing one embodiment of the spiral support used in the construction method of the present invention, and FIG. 3B is a cross-section of FIG. 3A taken along line A-A. FIG. FIG. 4 is a perspective view showing an embodiment of the connector with a male terminal and the connector with a female terminal of the present invention, and FIG. 5 further shows a helical support around the messenger wire and the cable wound by the method of the present invention. It is sectional drawing which shows one Example of a state. FIG. 6A is an exploded sectional view showing an embodiment of the connector with male and female terminals of the present invention, and FIG. 6B shows a state where the connector with male and female terminals of FIG. It is sectional drawing. FIG. 7 is a schematic side view showing a state where an embodiment of the fixture according to the construction method of the present invention is mounted, and FIG. 8 (a) is a leading pulley and an electric self-sending machine of FIG. FIG. 8B is an enlarged side view of the portion, and FIG.
FIG. 8 (c) is a front view showing the leading pulley of FIG. 8 (a) as viewed from the left side, showing a state in which the tow rope and the spiral support are not inserted.
FIG. 9 is a longitudinal sectional view of the electric self-transporter of FIG. 8A taken along a line BB.

As shown in FIGS. 1 and 2, utility poles 1a, 1b
A messenger wire 2 is stretched between the winches 3 in advance. The worker 4 rides on the inside of the bucket 5 installed near one of the utility poles 1a to perform the work of installing the spiral support. First, the tip 7 of the tow rope 6 shown in FIG. 2 and one end 9a of the first spiral support 8a for hanging a cable are connected to a leading pulley 10, and then a terminal to be described later of the electric self-transporter 11 is connected to a terminal. Connect the wires. The leading pulley 10 and the electric self-transporter 11 are rotatably mounted on the messenger wire 2 in advance.

Next, as shown in FIGS. 3 (a) and 3 (b), the spiral support 8 of the present invention is covered with a synthetic resin material 13 around a core wire 12 and has a spiral shape 14 in the longitudinal direction. And cut to a prescribed length of 100 cm or 150 cm. Nothing is inserted into one end 9 of the helical support 8, but the connector 1 with female terminals is previously inserted into the other end 15 of the helical support via a joint sleeve 16.
7b is attached. Moreover, the next spiral support 8
Is a connector 1 with a female terminal at the other end as shown in FIG.
7b is provided with a connector 17a with a male terminal at one end so that it can be easily connected to save labor on site. The spiral inner diameter D of the spiral support 8 in FIG.
As shown in FIG. 5, it is larger than the sum of the outer diameter d of the messenger wire 2 and the outer diameter d 'of the cable 19, and is preferably, for example, 200% or more.

Next, the connector 17 with a male terminal of the present invention
a and an example of the connector 17b with female terminals are shown in FIG.
And (b) will be described. Connector 1 with male terminal
A joint sleeve 16a is formed at the end of 7a,
One end of a spiral support 8 (not shown) is provided. A forked male terminal 172a having a projection 171a on the outer surface is formed in connection with the joint sleeve 16a. The connector 17b with a female terminal has a joint sleeve 1 at its end.
6b is formed, and the other end of the spiral support 8 (not shown) is attached. The bifurcated male terminal 172a is inserted and fitted in connection with the joint sleeve 16b, and the protrusion 171a
Female terminal 172b having an engagement hole 171b that engages with
Are formed. In the case of the present embodiment, the spiral support 8
Is inserted into the joint sleeve 16a and is compressed and fixed by applying heat. Similarly, the other end of the spiral support 8 is inserted into the joint sleeve 16b, and is heated and compressed to be fixed. Next, a forked male terminal 172a having a protrusion 171a on the outer surface connected to the joint sleeve 16a is inserted into the connector 17b with a female terminal.
The projection 171a of the 72a is engaged with the engagement hole 171b of the connector 17b with a female terminal. Connector 17 with male terminal
The material of the connector 17a and the female terminal-equipped connector 17b is preferably an acetal copolymer, but an elastic material such as an engineering plastic can also be used.

FIG. 7 shows a state in which the spiral support 8 is mounted.
FIG. 8 shows details of the leading pulley 10 and the electric self-transporter 11. The tip 7 of the towing line 6 in which the electric wire 111 is provided.
And one end 9 of the spiral support 8 is connected to the leading pulley 10,
Then, the electric wire 11 is connected to the terminal 112 of the electric self-transporter 11.
1 is connected. As the next procedure, the spiral support 8 is attached while being wound around the messenger wire 2 and the drawstring 6, and the power supply of the electric self-transporter 11 is turned on to the other electric pole 1b by a veterinary switch (not shown).・ Transfer while turning off. At this time, the spiral inner diameter D of the spiral supporting member 8 is made large as described above, so that the electric self-transporter 11 and the leading pulley 10 allow smooth transfer even with a long span of 200 m. can do.

This transfer eventually reaches the other end 15a of the first spiral support 8a, as shown in FIG. A connector 17b with female terminals is attached to the other end 15a of the first spiral support 8a via a joint sleeve 16. Further, a spiral support 8b is additionally provided, and a connector 17a with a male terminal is provided at one end of the spiral support 8b. The procedure of repeating the connection by this connection and the previous transfer procedure are repeated, and the mounting of the spiral support 8 is advanced.

When this work is advanced, the leading pulley 10 that connects the one end 9a of the first spiral support 8a and the tip 7 of the tow rope 6 eventually reaches the position of the other utility pole 1b as shown in FIG. The mounting of all the spiral supports 8a to 8i (FIG. 7) is completed between the electric pole 1a and the electric pole 1b. At this time, the first spiral support 8a and the last spiral support 8i are connected to the messenger wire 2 by the fixtures 18 shown in FIG.
Secure using 18.

The fixture 18 is not limited to one piece, but may be a few pieces.
It is desirable to fix them individually. This fixture 18
Although not shown in detail, in the case of the present embodiment, a metal wound band type was used. However, a U-shaped spring type fitting that fits into the messenger wire 2 and the spiral field support 8 may be used.

In this state, after removing the tip 7 of the tow rope 6 containing the conducting wire 111 and one end 9a of the spiral support 8a from the leading pulley 10 near the utility pole 1b in FIG. Is turned off, the electric wire is removed from the terminal part, the electric self-transporter 11 and the leading pulley 10 are detached from the messenger wire 2, and the tip 7 of the tow rope 6 containing the electric wire 111 is connected to the winch 3 in FIG. . Next, as shown in FIG. 1, the cable 19 is connected to the tow rope 6 on the side of the utility pole 1a. Then, when the rope 6 is wound up with the help of the winch 3, the cable 19 is drawn into the spiral support 8. The construction method of the present invention can be completed by the above procedure.

Here, the structure of the leading pulley 10 of the present invention will be described in detail. As shown in FIG. 8B, the box 20 includes a box 20 and a weight 22 suspended by a lower connecting rod 21. On the outer surface 20a on the right side of the box 20, a saddle 23 for inserting and grasping the tip 7 of the towing line 6 containing the electric wire 111 shown in FIG. 8A and a spiral support for hanging the cable are provided. Holder 24 for inserting and holding one end 9 of 8
It is equipped with. The saddle 23 is formed in a ring shape, and the holder 24 is formed of a cylindrical body having a shape corresponding to the cross-sectional shape of the spiral support 8.

As shown in FIG. 8B, a roller pulley 2 rolling on the messenger wire 2 is provided in the box 20.
5 is provided, but the side plate 20 on the left side of the box 20 is provided.
b is a removable type, so that the roller pulley 25
Has a structure detachable from the messenger wire 2 by a wing nut 26 screwed to a shaft.

The lower connecting rod 21 of the box 20 has a weight 2
Since the second pulley 2 is suspended, the leading pulley 10 is stably held so as not to be inverted. This weight 22
The nuts 27a and 27b are screwed up and down, and the weight 22 can be easily replaced by removing the nut 27b. In the case of the present embodiment, a weight of 85 g is used, but an optimum weight is selected from several kinds of prepared weights in response to external factors such as wind.

The electric self-transporter 11 has a body 11 with a notch on a side surface for attaching to and detaching from the messenger wire 2.
3, a small electric motor 114, a speed reducer 115, and a weight W at its lower part (see FIG. 8). A pair of upper rollers 116 and a pair of lower rollers 118
Is attached to the body 113. Upper roller 11
A belt 117 is suspended between the rollers 6, and a pair of lower rollers 118 supports the messenger wire 2 from below. The upper roller 116 and the belt 117 are held from above the messenger wire 2, and the messenger wire 2 is held from below the messenger wire 2 by the lower roller 118 so that the rollers 116 and 118 can roll. Outside the body 113, a connecting wire 119 for connecting to the leading pulley 10 is provided.
A terminal 112 for connecting 1 is provided on the small motor 114. The electric self-transporter 11 enables stable transfer between power poles having a long span of about 200 m only near the power poles.

The electric self-transporter 11 and the leading pulley 10 having the above-mentioned structures simplify the operation of connecting the pulling rope 6 with the electric wire 111 and the spiral support 8 for suspending the cable, and provide a stable transfer. Therefore, this construction method is useful even for a long span of 200 m.

[0021]

According to the construction method of the present invention, it is no longer necessary to perform a dangerous suspension work even for a long span as long as 200 m, and all work can be performed near a utility pole. Attachment of the spiral support as a support has become safe and easy.

Further, according to the construction method of the present invention, there is no need to mount and remove a laying jig such as a gold wheel at a high place, and there is no danger of parts falling to passers-by.

According to the construction method of the present invention, the disadvantages of lateral displacement and falling off are eliminated by the crimp fixing method of the spiral support and the joint sleeve, and by the fixing of the spiral support and the messenger wire by the fixture.

Further, by using the electric self-transporter or the leading pulley, it is possible to completely prevent reversal during construction of the spiral support and crossing of the tow rope and the messenger wire. Then, stable work can be performed, and the joining operation of the tip of the tow rope and the helical support having the conducting wire therein can be simplified as compared with the related art.

[Brief description of the drawings]

FIG. 1 is a schematic side view showing one embodiment of a method for installing a spiral support for hanging a cable according to the present invention.

FIG. 2 is a schematic exploded side view showing one embodiment of the connection and connection of the spiral support of the present invention.

FIG. 3A is a side view showing an embodiment of a spiral support used in the construction method of the present invention, and FIG.
It is sectional drawing which cut | disconnected (A) by AA line.

FIG. 4 is a perspective view showing one embodiment of a connector with a male terminal and a connector with a female terminal of the present invention.

FIG. 5 is a sectional view showing an embodiment in which a messenger wire and a cable are wound by a spiral support according to the construction method of the present invention.

6A is an exploded cross-sectional view showing one embodiment of a connector with male and female terminals of the present invention, and FIG. 6B is a cross-sectional view showing a state where the connectors with male and female terminals of FIG. FIG.

FIG. 7 is a schematic side view showing a state in which an embodiment of the fixture according to the construction method of the present invention is attached.

8 (a) is an enlarged side view of the leading pulley and the electric self-transporter portion of FIG. 1C, and (b) is a pulling line and spiral support of the leading pulley of FIG. 8 (a) viewed from the left side. It is a front view which shows the state in which the tool is not inserted, (c) is the longitudinal cross-sectional view which cut | disconnected the electric self-transporter of FIG.8 (a) along the BB line.

FIG. 9 is a schematic exploded side view showing an example of a construction state of a conventional cable hanging hanger system.

FIG. 10 is a schematic side view showing an example of a construction method using a conventional cable hanging hanger system.

[Explanation of symbols]

 2 Messenger wire 6 Tow line with electric wire for conduction 8 Spiral support 10 Lead pulley 11 Electric self-transporter 16 Joint sleeve 17a Connector with male terminal 17b Connector with female terminal 18 Fixture 19 Cable 20 Lead pulley box 111 Electric conduction Electric wire 112 Terminal of electric self-transporter 113 Body of electric self-transporter 114 Small electric motor of electric self-transporter 115 Reducer of electric self-transporter 116 Upper roller of electric self-transporter 117 Belt on electric self-transporter 118 Lower roller of electric self-conveyor 119 Connecting wire between leading pulley and electric self-conveyor D Spiral inside diameter of spiral support d Outside diameter of messenger wire d 'Outside diameter of cable W Weight of electric self-conveyor

Continuation of the front page (56) References JP-A-9-271122 (JP, A) JP-A-10-178716 (JP, A) JP-A-9-70117 (JP, A) (58) Fields studied (Int .Cl. ⁷ , DB name) H02G 1/02 H02G 7/10

Claims (4)

(57) [Claims] 1. A method for installing a spiral support for suspending a cable on a messenger wire stretched between utility poles having a long span of about 200 m, wherein one end of the spiral support for suspending the cable near one of the utility poles. And a step of coupling the tip of the pulling line to a leading pulley having a weight suspended below, and winding a spiral support having an inner diameter larger than the sum of the outer diameter of the messenger wire and the outer diameter of the cable around the messenger wire and the pulling line. A procedure in which the tip of the tow rope is provided with a weight at a lower portion, and the messenger wire is transferred from the upper and lower sides of the messenger wire to the other power pole side by an electric self-conveying device that holds the messenger wire by a roller; The connection is repeated with a connector with male and female terminals that forms a joint sleeve at the other end of the Returning the electric motor, the step of fixing the spiral support to the messenger wire by the fixture when the electric self-transporter and the leading pulley reach the other electric pole, And drawing the cable connected to the spiral support into the spiral support. 2. An apparatus for installing a helical support for hanging a cable on a messenger wire stretched between utility poles having a long span of about 200 m, wherein one end of the helical support for hanging and the tip of a tow rope are connected. A lead pulley having a weight suspended at the lower part thereof; an electric self-transporter having a weight attached to a lower part attached to the tip of the tow line and holding the messenger wire by rollers from above and below the messenger wire; A connector with male and female terminals forming a joint sleeve that connects the other end of the spiral support and one end of the next spiral support connected to the same, and a fixture for fixing the spiral support to the messenger wire An apparatus for constructing a spiral support for hanging a long span cable. 3. The leading pulley includes a detachable roller pulley that rolls on a messenger wire, a saddle into which one end of a pulling wire containing an electric wire is inserted, and one end of a spiral support. 3. The apparatus according to claim 2, further comprising a holder and a weight suspended from a lower portion thereof. 4. An electric self-transporter comprises a connecting wire connected to a leading pulley, a small electric motor connected to a current-carrying electric wire having terminals, a roller for holding a messenger wire from above and below, and a weight inside the lower part. The construction device for a spiral support for hanging a long span cable according to claim 2 or 3.