JP2001095118A - Optical cable wrapping machine for overhead ground wire - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To improve workability such as a work of lifting an optical cable winding machine to a top of a steel tower and a work of crossing a steel tower. SOLUTION: A counterweight 91 is attached by a hinge 92 so as to be rotatable up and down. A right-angled state holding means 96 for holding the counterweight 91 substantially at right angles to the longitudinal direction of the main body frame, and rotating the counterweight 91 upward as indicated by a two-dot chain line to maintain the counterweight 91 substantially parallel to the longitudinal direction of the main body frame. A parallel state holding means 48 is provided. At the time of lifting the optical cable wrapping machine 21 to the top of the steel tower or carrying out the work on the steel tower, when the counterweight 91 is held in a state parallel to the longitudinal direction of the main body frame, the height of the apparatus is reduced, and
Also, the center of gravity of the device approaches the center of the device. Therefore, there is little possibility that the counterweight 91 comes into contact with the steel tower or the overhead ground wire, and the workability of the work is remarkably improved. Since there is no need to attach and detach the counterweight 91 at a high place, there is no danger of parts falling.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical cable wrapping machine which is installed movably on an overhead ground line of an overhead power transmission line and winds an optical cable around the overhead ground line, in particular, for generating a force for turning a bobbin. Has the feature of the counterweight.

[0002]

2. Description of the Related Art In general, an overhead power transmission line is provided with an overhead ground wire for lightning protection. An optical cable for constructing an optical communication network is laid using the overhead ground wire. ing. 2. Description of the Related Art Conventionally, an optical fiber overhead ground wire (OPGW) in which an optical cable is housed in an aluminum tube arranged at the center of a metal stranded wire layer constituting a current path has been widely used in view of the reliability of optical fiber protection and the like. However, recently, a direct winding method in which an optical cable is directly spirally wound around an overhead ground wire and laid is also adopted.

The work of directly winding an optical cable around an overhead ground wire is performed by pulling and running an optical cable winding machine suspended on an overhead ground wire with a rope. For example, as shown in FIG. When the winding machine body 2 is towed by the rope 3, the rotation of the roller 5 riding on the overhead ground wire 4 is transmitted to the revolving frame 7 via the gear mechanism 6, and the revolving frame 7 is It is known that the optical cable 9 is wound out from a bobbin 8 which turns around the ground wire 4 and turns integrally with the turning frame 7 so that the optical cable 9 is spirally wound around the overhead ground wire 4. I have.

[0004] In this case, if there is no reaction force opposing the force of turning the bobbin 8, the winding machine main body 2 turns in the opposite direction and cannot be wound. An extended counterweight 11 is provided. The counterweight 11 has a configuration in which the arm portion 11a is made sufficiently long and the counterweight main body portion 11b is fixed to the lower end thereof in order to generate a sufficiently large reaction force (moment) that can counter the turning force of the bobbin 8. In the conventional optical cable winding machine 1, the upper end of the arm portion 11a of the counterweight 11 is simply fixed to the winding machine main body 2 with bolts or the like.

[0005]

As described above, the counterweight 11 hangs largely from the winding machine main body 2 due to the necessity of generating a large moment, so that the optical cable winding machine 1 is moved before the winding operation is started. When hanging the optical cable winding machine 1 from one side of the tower to the other side, it is easy to come into contact with the tower or the overhead ground wire 4 when lifting the optical cable winding machine 1 from the span on one side to the span on the other side. There was a problem that workability was extremely poor. Also, when the optical cable wrapping machine 1 hung on the top of the tower is suspended on the overhead ground wire 4, the long counterweight 11 impairs the workability.

Therefore, when the optical cable wrapping machine 1 is lifted to the top of a steel tower or when it is passed over a steel tower, the counterweight 1
Although it is also possible to remove 1 from the winding machine main body 2, in this case, attaching and detaching the counterweight 11 is complicated, and workability is significantly reduced. In addition, when components are attached and detached on a steel tower, there is a danger that components will fall, which is extremely dangerous for workers and the like below.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned conventional drawbacks, and it is not necessary to remove a counterweight at the time of lifting an optical cable winding machine to a top of a steel tower or at the time of passing over a steel tower. It is an object of the present invention to provide an optical cable wrapping machine for an overhead ground wire that can perform work and mounting work of the counterweight to the wrapping machine main body with good workability.

[0008]

SUMMARY OF THE INVENTION The present invention, which solves the above-mentioned problems, is an optical cable wrapping machine which is installed movably on an overhead ground line of an overhead power transmission line and winds an optical cable around the overhead ground line. A frame, a turning frame attached to the outside of the main frame so as to be rotatable around the overhead ground wire, a bobbin for winding an optical cable rotatably mounted to the turning frame, and an overhead ground wire. A traveling pulley attached to the main body frame so as to ride on the main frame, and a rotation transmission mechanism for transmitting rotation of the traveling pulley to the revolving frame and driving the revolving frame to pivot, the basic frame comprising: In addition, a counterweight for generating a force for rotating the bobbin is extended downward and is attached rotatably up and down by a hinge, and the counterweight is substantially aligned with the longitudinal direction of the main body frame. Perpendicular state holding means for holding at a right angle, characterized in that a parallel state holding means for holding by rotating the counterweight upwardly to a state of being substantially parallel to the body frame longitudinal direction.

According to a second aspect of the present invention, in the optical cable winding machine of the first aspect, a counterweight mounting plate extending downward is fixed to the main body frame, and an arm portion of the counterweight is hinged below the counterweight mounting plate. And an engagement pin for engaging the middle portion of the arm portion with the counterweight mounting plate side as the right-angled state holding means.

According to a third aspect of the present invention, in the optical cable winding machine according to the first aspect, the parallel state holding means is provided on a portion that becomes a lower surface of the revolving frame when the optical cable winding machine is suspended on an overhead ground wire. Features.

[0011]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to FIGS. FIG. 6 is a view for explaining a situation in which the optical cable 9 is wound around the overhead ground wire 4 stretched between the power transmission towers 10 using the optical cable winding machine 21 according to one embodiment of the present invention. Perform winding work.

FIG. 1 is a side view, FIG. 2 is a plan view, and FIG. 3 is a front view of an optical cable winding machine 21 according to an embodiment of the present invention. As shown in these figures, the optical cable wrapping machine 21 includes a main body frame 23, a turning frame 24 attached to the outside of the main body frame 23 so as to be able to turn around the overhead ground wire 4,
An optical cable winding bobbin 25 rotatably mounted on the revolving frame 24, a traveling pulley 26 mounted on the body frame 23 so as to ride on the overhead ground wire 4, and rotation of the traveling pulley 26. It has a basic configuration including a rotation transmission mechanism 27 that transmits the rotation to the revolving frame 24 and drives the revolving frame 24 to revolve.

The main frame 23 includes a turning frame support 30 that penetrates through the turning frame 24 and rotatably supports the turning frame 24.
The revolving frame 24 includes a front part 31 extending to a front part and a rear part 32 extending to a rear part. As shown in FIG. 4, the revolving frame support 30 and the revolving frame 24 are provided with grooves a and b for inserting the overhead ground wire 4 into the center from below.

The front portion 31 of the main frame 23 includes a counterweight mounting plate 35 directly fixed to the revolving frame support portion 30 and extending downward, and a gear mounting plate 36 integrally fixed to the counterweight mounting plate 35. , This gear support plate 3
6 and the like. On the pulley support frame 37, the aforementioned traveling pulley 26 riding on the overhead ground wire 4 and the traveling pulley 40 as an auxiliary
Are rotatably mounted, and further, each pulley 26, 4
A detachment prevention roller 41 is attached to the lower surface side of the overhead ground wire 4 to prevent 0 from coming off the overhead ground wire 4.

A pulley support frame 55 is fixed to the rear surface portion 32 of the main body frame 23, and a rear traveling pulley 56 that rides on the overhead ground wire 4 is rotatably mounted on the pulley support frame 55. A slip-off preventing roller 57 is provided on the lower surface side of the overhead ground wire 4 to prevent the traveling pulley 56 from coming off the overhead ground wire 4.

As shown in FIGS. 2 and 3, the traveling pulley 26
Bevel gear 44, bevel gear 45 and spur gear 46 integral therewith, intermediate spur gears 47 and 48, and rotation driven spur gear 49
(These components constitute the above-described rotation transmission mechanism 27), and are sequentially transmitted to the revolving frame 24 integrated with the revolving driven spur gear 49.
Turns around the overhead ground wire 4. Each of the counterweight mounting plate 35, the gear mounting plate 36, and the revolving driven spur gear 49 has a groove c (see FIG. 3) for inserting the overhead ground wire 4 into the center from below.

A bobbin shaft 61 to which the bobbin 25 is detachably fitted and fixed is rotatably mounted via a bearing 62 on a bobbin support shaft 60 fixed to the side surface of the revolving frame 24, and the bobbin shaft 61 is revolved. Sprocket 6 on frame 24 side
3 is fixed. Reference numeral 67 denotes a hysteresis brake, which functions as a bobbin brake that applies a brake torque to the rotation of the bobbin 25.

2, 3 and 4, etc., reference numeral 80 denotes an automatic balance weight adjusting mechanism. The balance weight automatic adjusting mechanism 80 controls the remaining amount (remaining weight) of the optical cable 9 remaining on the bobbin 25 so that the weight on the bobbin 25 side becomes unbalanced and the turning of the turning frame 24 does not lose smoothness. The position of the balance weight 87 is moved and adjusted in accordance with the position of the bobbin 25.
Weight moving screw 82 that rotates in conjunction with the rotation of
Is driven via a nut 88.

In FIGS. 1, 3 and the like, reference numeral 91 denotes a counterweight. The counterweight 91 serves as a reaction force for generating a force for turning the bobbin 25, and the counterweight 91 is formed on the main body frame 23 so that the traveling pulleys 26, 40, and 56 maintain vertical on the overhead ground wire 4. This is for keeping the posture constant. An arm portion 91a is vertically rotatably attached to the counterweight mounting plate 35 of the front portion 31 of the main body frame 23 via a hinge 92, and a counterweight main body portion 91b is fixed to a tip of the arm portion 91a.

The arm 9 of the counterweight 91
1a is a pin hole 9 at a position slightly closer to the tip than the hinge 92.
1c, and a retractable engaging pin 9 attached to a bracket 35a fixed to the counterweight attaching plate 35 side.
6 can be inserted into the pin hole 91c. The engagement pin 96 and the arm 9 on the counterweight mounting plate 35 side
The pin hole 91c of 1a constitutes a right angle state holding means 99 for holding the counterweight 91 substantially at right angles to the longitudinal direction of the main body frame 23 (the left and right direction in FIG. 1 and the like),
By inserting the engaging pin 96 into the pin hole 91c of the arm portion 91a, the counterweight 91 is held at right angles to the longitudinal direction of the main body frame. The engaging pin 96 is urged inward by a built-in spring (not shown) and does not fall off. In this state, the counterweight 91 has a large moment since the counterweight main body 91b is sufficiently separated from the overhead ground wire 4 and has a large moment.
5 is large enough to oppose the turning force of No. 5, and generates a force for turning the bobbin 25 without the main frame 23 turning in the reverse direction.

The mounting plate 9 perpendicular to the lower surface of the revolving frame 24
7 is fixed, and an engagement pin 98 is attached to the attachment plate 97. The engagement pin 98 can be retracted by spring force, and as shown by a two-dot chain line in FIG. 1, an engagement hole 91d on the bottom surface of the counterweight main body portion 91b of the counterweight 91 parallel to the longitudinal direction of the main body frame. And hold it parallel to the longitudinal direction of the main body frame. The mounting plate 97, the engagement pin 98, the engagement hole 91d on the bottom surface of the counterweight main body 91b, and the like constitute parallel state holding means 100 for holding the counterweight 91 substantially parallel to the longitudinal direction of the main body frame. The engaging pin 98 is urged to the left in FIG. 1 by a built-in spring (not shown) and does not fall off. The lower surface of the revolving frame 24 is a lower surface when the optical cable winding machine 21 is suspended on the overhead ground wire 4, and is a surface provided with a groove b as shown in FIG. . When the optical cable wrapping machine 21 is suspended on the overhead ground wire 4, the revolving frame 24 has its groove b face down as shown in FIG. 4, but the bent counterweight 91 is fixed to the mounting plate 97. And the turning frame 2
The groove b of 4 automatically comes to the lower surface.

An operation of winding the optical cable 9 around the overhead ground wire 4 using the optical cable winding machine 21 will be described. The optical cable wrapping machine 21 is lifted up to the height of the overhead ground wire 4 in the vicinity of the power transmission tower 10, and the lower grooves a, b, c of the main body frame 23, the turning frame 24, the turning driven spur gear 49, etc.
Then, the traveling pulleys 26, 40, and 56 are placed on the overhead ground wire 4 such that the overhead ground wire 4 is inserted into the center of the optical fiber winding device 21. Thus, the optical cable winding machine 21 is suspended on the overhead ground wire 4. When the rope 22 hung on the rope locking portion 95 is pulled, the optical cable winding machine 21 travels forward. At this time, the traveling pulleys 26, 40, and 56 roll on the overhead ground wire 4 while supporting the weight of the optical cable winding machine 21, but the rotation of the traveling pulley 26 causes the bevel gear 44 and the bevel gear 45 to mesh with each other. And transmitted to a spur gear 46 integral with the bevel gear 45,
The rotation of the spur gear 46 is transmitted to the turning driven spur gear 49 in two paths by the two intermediate spur gears 47 and 48, and the turning frame 24 integrated with the turning driven spur gear 49 extends around the main body frame 23, that is, in an imaginary ground. The bobbin 25 attached to the turning frame 24 turns around the line 4, and turns around the overhead ground line 4. On the other hand, when the optical cable winding machine 21 moves forward, the bobbin 2
Since the optical cable 9 wound around 5 is paid out, the optical cable 9 is spirally wound around the overhead ground wire 4.

When the optical cable wrapping machine 21 is lifted to the top of a steel tower, and when the optical cable wrapping machine 21 is
At the time of steel tower transfer from one span on one side to the span on the other side, the counterweight 91 is rotated upward about a hinge 92 as shown by a two-dot chain line in FIG. And keep it parallel. Then, the height of the device is reduced to a small value, and the risk of the counterweight 91 coming into contact with the steel tower 10 or the overhead ground wire 4 during lifting work of the optical cable wrapping machine 21 or crossing the steel tower is reduced, and the workability of the work is reduced. Significantly improved. In addition, since the center of gravity of the apparatus approaches the center of the apparatus, work is facilitated at this point, and workability is improved. Further, when suspending the optical cable wrapping machine 21 on the overhead ground wire 4, the height at which the optical cable wrapping machine 21 is lifted is low, and workability is also improved in this respect. Also, at this time,
Since the groove b of the revolving frame 24 is always on the lower surface, the revolving frame 2 is placed at a high place to pass the overhead ground wire 4 inside the revolving frame 24.
There is no need to turn the dial 4 for adjustment, and workability is also good in this regard. As described above, the lifting and the steel tower work can be easily performed while the counterweight 91 is mounted, so that there is no need to remove the counterweight 91 at all,
Workability is greatly improved. In addition, since it is not necessary to attach and detach components at a high place, the operability is improved, and there is no danger of the components being dropped. Thus, workability and safety are greatly improved.

FIG. 5 illustrates still another operation of the counterweight 91. Counter weight 91
Considering the load F acting on the overhead ground wire 4 from the traveling pulley 26 due to the weight W of the overhead pulley 26 in a direction perpendicular to the overhead ground wire 4 (hereinafter, referred to as a perpendicular load F of the traveling pulley 26 by the counterweight 91), the optical cable winding machine 21 When the vehicle travels on the horizontal overhead ground line 4, the perpendicular load F1 of the traveling pulley 26 is equal to the weight W of the counterweight 91, as shown in FIG. Counter weight 9
Assuming that there is no right-angle state holding means for holding 1 at a right angle to the longitudinal direction of the main body frame, when the overhead ground wire 4 has a gradient of an angle θ as shown in FIG. In this case, the perpendicular weight F2 of the traveling pulley 26 due to the counterweight 91 is dropped.
Is F2 = W × cos θ, which is smaller. On the other hand, when the counterweight 91 is held at right angles to the longitudinal direction of the main body frame (at right angles to the overhead ground wire 4) by the right-angled state holding means as in the present invention (see FIG. 5C), The perpendicular load F3 is F3 = W × cos θ × L2 / L1
And is at least larger than F2. Therefore, the effect of increasing the gripping force of the traveling pulley 26 on the overhead ground wire 4 and reducing the risk of slippage of the traveling pulley 26 is obtained.

The counterweight 91 of the embodiment
Is the counterweight mounting plate 3 fixed to the body frame 23
5 through a hinge 92, but the main body frame 23
The arm may be directly fixed to the arm, and a hinge may be provided in the middle of the arm to enable bending. However, when the counterweight mounting plate 35 of the embodiment is considered to be a part of the arm portion of the counterweight, it can be said that the configuration is the same. Right angle state holding means 99 and parallel state holding means 10
0 is not limited to the engagement pin 96 or the engagement pin 98 as in the embodiment. In short, what is necessary is just to be able to hold the counterweight substantially perpendicularly or parallel to the longitudinal direction of the main frame. Further, the parallel state holding means 10
0 may be attached not to the turning frame 24 but to the main body frame 23.

[0026]

According to the present invention, the counterweight is mounted so as to be rotatable up and down by a hinge, and the counterweight is held at a right angle to the longitudinal direction of the main body frame. Since the parallel state holding means for rotating and holding the main body frame in a state substantially parallel to the longitudinal direction is provided, the following effects can be obtained. When lifting the optical cable wrapping machine to the top of the tower or handing over the tower, holding the counterweight in a state parallel to the longitudinal direction of the main frame reduces the height of the device to a small value, so that the counterweight can be installed on the tower or overhead ground. The risk of contact with the wires is reduced and the workability of these operations is significantly improved. In addition, since the center of gravity of the apparatus is closer to the center of the apparatus, work is easy at this point, and workability is improved. When suspending the optical cable wrapping machine on the overhead ground wire, the height at which the optical cable wrapping machine is lifted is low, so that workability is also improved in this respect. As mentioned above, it is possible to easily lift the tower to the top of the tower and pass it over with the counterweight attached,
It is no longer necessary to remove the counterweight, greatly improving workability. In addition, since it is not necessary to attach and detach components at a high place, there is no danger of components falling, and the danger to workers and the like below is eliminated. Thus, workability,
Safety is greatly improved. Since the counterweight can be held at a right angle to the longitudinal direction of the main body frame by the right angle state holding means, the load F perpendicular to the overhead ground line of the traveling pulley by the counterweight is largely maintained at the installation point where the overhead ground line is inclined. In addition, a large grip force of the traveling pulley with respect to the overhead ground wire is maintained, and the traveling pulley does not slip.

[Brief description of the drawings]

FIG. 1 is a side view of an optical cable winding machine around an overhead ground wire according to an embodiment of the present invention.

FIG. 2 is a plan view of the optical cable winding machine of FIG.

FIG. 3 is a partially cutaway front view of the optical cable winding machine of FIG. 1;

FIG. 4 is a cross-sectional view (but partially omitted) taken along the line AA of FIG. 2;

FIG. 5 is a diagram illustrating the operation of the counterweight according to the present invention.

FIG. 6 is a diagram illustrating a situation in which the optical cable winding machine winds an optical cable around an overhead ground wire.

FIG. 7 is a side view of a conventional optical cable winding machine.

[Explanation of symbols]

 REFERENCE SIGNS LIST 4 overhead ground wire 9 optical cable 10 power transmission tower 21 optical cable wrapping machine 22 rope 23 body frame 24 revolving frame 25 bobbin 26 running pulley 27 rotation transmission mechanism 30 revolving frame support part 31 front part 32 rear part 35 counterweight mounting plate 36 gear mounting Plate 37 Pulley support frame 40 Running pulley 41 Detachment roller 44, 45 Bevel gear 46 Spur gear 47, 48 Intermediate spur gear 49 Revolving driven spur gear 55 Pulley support frame 56 Traveling pulley 57 Detachment prevention roller 60 Bobbin support shaft 61 Bobbin shaft 62 Bearing 80 Automatic balance weight adjustment mechanism 87 Balance weight 91 Counter weight 91a Arm part 91b Counter weight main body part 91c Pin hole 91d Engagement hole 92 Hinge 95 Rope connection part 96 Engagement pin 97 Mounting plate 98 Engagement pin 99 Right angle state Means 100 parallel state holding means

 ──────────────────────────────────────────────────続 き Continued from the front page (72) Inventor Yoshihiko Sano 1-5-1 Kiba, Koto-ku, Tokyo F-Terminal in Fujikura Co., Ltd. 2H038 CA65

Claims (3)

[Claims] An optical cable wrapping machine installed on an overhead ground line of an overhead power transmission line so as to be able to travel and wind an optical cable around the overhead ground line, comprising: a main body frame; A revolving frame rotatably mounted around the overhead ground wire, an optical cable winding bobbin rotatably mounted on the revolving frame, and a traveling pulley mounted on the body frame so as to ride on the overhead ground wire And a rotation transmission mechanism for transmitting the rotation of the traveling pulley to the revolving frame to revolve the revolving frame, and for generating a force for revolving the bobbin on the main body frame. Right angle state holding means for extending the counter weight downward and rotatably mounting up and down by a hinge, and holding the counter weight substantially at right angles to the longitudinal direction of the main body frame; Cable winding machine to the ground wire, characterized in that a parallel state holding means for holding the state of being substantially parallel to the body frame longitudinal rotates the over weight upward. 2. A counterweight mounting plate extending downward is fixed to the body frame, and an arm portion of the counterweight is mounted on a lower portion of the counterweight mounting plate via a hinge so as to be rotatable up and down. 2. The optical cable wrapping machine according to claim 1, wherein an engagement pin is provided as a right angle state holding means, the engagement pin engaging an intermediate portion of the arm portion with the counterweight mounting plate side. 3. The overhead ground wire according to claim 1, wherein said parallel state holding means is provided on a portion which is a lower surface of said revolving frame when said optical cable winding machine is suspended on said overhead ground wire. Optical cable wrapping machine.