JP3599171B2 - Optical cable winding machine for overhead ground wire - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical cable wrapping machine which is installed on an overhead ground line of an overhead power transmission line so as to be able to travel and winds an optical cable around the overhead ground line, and in particular, the remaining amount (remaining weight) of an optical cable wound around a bobbin. It has a feature in a balance weight position automatic adjustment mechanism that takes a moment balance corresponding to the above.
[0002]
[Prior art]
In general, an overhead power transmission line is provided with an overhead ground wire for lightning countermeasures. An optical cable for constructing an optical communication network is laid using the overhead ground wire. 2. Description of the Related Art Conventionally, an optical fiber composite 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.
[0003]
The operation of directly winding the optical cable around the overhead ground wire is performed by pulling and running the optical cable winding machine suspended on the overhead ground wire with a rope. For example, as in the optical cable winding machine 1 shown in a plan view in FIG. When the attached machine body 2 is towed by the rope in the direction of the arrow (a), the rotation of the traveling pulley 5 riding on the overhead ground wire 4 is transmitted to the revolving frame 7 via a rotation transmission mechanism (not shown), The turning frame 7 turns around the overhead ground wire 4, and the optical cable 9 is paid out from a bobbin 8 that turns integrally with the turning frame 7, so that the optical cable 9 is spirally wound around the overhead ground wire 4. Are known.
[0004]
In this case, since usually only one bobbin 8 is provided, a balance weight 15 for moment balance is provided on the opposite side of the bobbin 8 in order to balance the weight of the entire swiveling part. When the optical cable 9 is wound around the overhead ground wire 4 and the remaining amount of the optical cable 9 wound around the bobbin 8 decreases, the weight balance of the entire swirling portion changes. ), An automatic balance weight position adjusting mechanism 16 for gradually moving the position of the balance weight 15 inward (toward the revolving frame 7) to balance the moment is provided.
The balance weight position automatic adjusting mechanism 16 is provided with a weight moving screw 17 which rotates in conjunction with the rotation of the bobbin 8 (an interlocking mechanism is omitted), and a nut 18 screwed to the weight moving screw 17 is connected to the balance weight 15. When the weight moving screw 17 rotates in conjunction with the rotation of the bobbin 8, the balance weight 15 moves along the weight guide shaft 19 together with the nut 18 toward the inside (toward the revolving frame 7). Thus, the weight (moment) is balanced in accordance with the remaining weight of the optical cable 9 wound around the bobbin 8.
[0005]
[Problems to be solved by the invention]
In this type of optical cable winding machine 1, the length of the weight guide shaft 19 and the weight moving screw 17 is not provided with an allowance so that the weight of the swivel part can be reduced, and the optical cable 9 is moved from the full bobbin state to the empty bobbin state. Is designed so that the required movement amount of the balance weight 15 corresponding to the above is achieved by using the entire length of the weight guide shaft 19. Therefore, when the position of the balance weight 15 at the time of start is erroneously set closer to the inside than the correct start position, before the optical cable 9 on the bobbin 8 becomes empty, the balance weight 15 turns as shown by a two-dot chain line. 7, and the balance weight 15 stops moving any further. Then, the bobbin 8 and the turning frame 7 linked with the rotation of the weight moving screw 17 cannot be turned, and the traveling pulley 5 linked with the turning of the turning frame 7 via a rotation transmission mechanism (not shown). It becomes impossible to rotate and the optical cable winding machine 1 becomes unable to run.
If the optical cable winding machine 1 does not move during the operation of winding the optical cable around the overhead ground wire 4 (that is, in the middle portion of the overhead ground wire 4), the traveling pulley 5 does not rotate the bobbin 8 and the rotating frame 7 and rotates. There is no method of recovering the optical cable wrapping machine 1 other than forcibly pulling the optical cable wrapping machine 1 to a steel tower in the locked state. If such forcible tow collection is performed, the optical cable 9 becomes waste and the traveling pulley 5 of the optical cable winding machine 1 is damaged.
[0006]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned conventional problem. Even if the position of the balance weight at the time of start is erroneously set to the inside, the optical cable winding machine does not move halfway. Accordingly, an object of the present invention is to provide an optical cable wrapping machine for an overhead ground wire, which does not cause a problem that an optical cable becomes a waste and a traveling pulley is damaged.
[0007]
[Means for Solving the Problems]
The present invention for solving the above problems is an optical cable winding machine for an overhead ground wire that is installed movably on an overhead ground wire of an overhead power transmission line and winds an optical cable around the overhead ground wire,
A body frame, a revolving frame rotatably mounted around the overhead ground wire outside the body frame, a bobbin for winding an optical cable rotatably mounted on the revolving frame, and riding on the overhead ground wire. A basic configuration including a traveling pulley attached to the main body frame, and a rotation transmission mechanism that transmits the rotation of the traveling pulley to the revolving frame and drives the revolving frame to rotate,
A weight moving screw having the same axis as the bobbin shaft at a position opposite to the bobbin mounting position of the revolving frame, and a weight moving female screw member screwed to the weight moving screw are integrally fixed to the bobbin. A balance weight set at an initial position corresponding to the amount of the optical cable to be wound; and a rotatably supporting the weight moving screw and supporting the balance weight so as to be able to move in parallel along the weight moving screw. A weight guide shaft fixed to the frame in a cantilever manner, and a bobbin rotation interlocking mechanism using only a conductive member for continuously transmitting force, which rotates the weight moving screw in conjunction with the rotation of the bobbin. in together when provided with a balance weight position automatic adjustment mechanism,
At a position immediately before the balance weight reaches the movement limit on the revolving frame side, the threaded state between the weight moving female screw member and the weight moving screw is automatically released , and the weight moving female screw is As a mechanism for automatically releasing the screwed state between the member and the weight moving screw, a shaft portion having no thread is formed near an end of the weight moving screw on the turning frame side .
[0009]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to FIGS. FIG. 8 is a diagram illustrating 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 the embodiment of the present invention, and the rope 22 is pulled. Perform winding work.
[0010]
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 revolving frame 24 attached to the outside of the main body frame 23 to be rotatable around the overhead ground wire 4, and a revolving frame 24. An optical cable winding bobbin 25 rotatably mounted on the main frame 23, and a traveling pulley 26 mounted on the body frame 23 so as to ride on the overhead ground wire 4. And a rotation transmission mechanism 27 that transmits the rotation to drive the rotation frame 24.
[0011]
The main frame 23 extends through the turning frame 24 to rotatably support the turning frame 24, a front portion 31 extending to the front of the turning frame 24, and extending to the rear. And a rear surface portion 32. As shown in FIG. 5, 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.
[0012]
The front portion 31 of the main body frame 23 includes a counterweight mounting plate 35 directly fixed to the revolving frame support portion 30 and extending downward, a gear mounting plate 36 integrally fixed to the counterweight mounting plate 35, It is composed of a pulley support frame 37 fixed to the mounting plate 36 and the like.
The above-described traveling pulley 26 riding on the overhead ground line 4 and a traveling pulley 40 as an auxiliary in front of the above-mentioned traveling pulley 26 are rotatably mounted on the pulley support frame 37. Further, each of the pulleys 26 and 40 comes off from the overhead ground line 4. A detachment prevention roller 41 pressed against the lower surface side of the overhead ground wire 4 for preventing the occurrence of the grounding is provided.
[0013]
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 attached to the pulley support frame 55. Is provided on the underside of the overhead ground wire 4 to prevent the ground wire 4 from coming off from the overhead ground wire 4.
[0014]
As shown in FIGS. 2 and 3, a bevel gear 44 is fixed to a shaft of the traveling pulley 26, and a bevel gear 45 meshing with the bevel gear 44 is rotatably mounted on the gear mounting plate 36. A spur gear 46 is fixed to the other end of the shaft of the bevel gear 45, and two intermediate spur gears 47 meshing with both the spur gear 46 and the turning driven spur gear 49 fixed to the front end of the turning frame 24. , 48 are mounted on the gear mounting plate 36. Each of the counterweight mounting plate 35, the gear mounting plate 36, and the revolving driven spur gear 49 has a groove c for inserting the overhead ground wire 4 from below into the center.
The bevel gears 44, 45, spur gears 46, intermediate spur gears 47, 48 on the main body frame 23 side and the rotation driven spur gear 49 on the rotation frame 24 side transmit the rotation of the traveling pulley 26 to the rotation frame 24 to perform the rotation. The rotation transmission mechanism 27 that drives the frame 24 to rotate is constituted.
[0015]
A bobbin support shaft 60 is fixed to the side surface of the revolving frame 24 in a direction orthogonal to the longitudinal direction of the revolving frame (the longitudinal direction of the overhead ground wire 4: the left-right direction in FIG. 2). A rotatable bobbin shaft 61 is mounted via a bearing 62 so as to be rotatable, and a sprocket 63 is fixed to the bobbin shaft 61 on the revolving frame 24 side.
A gearbox 65 for transmitting the rotation of the sprocket 63 through a chain 64 and a sprocket 66 is installed on the revolving frame 24, and a bobbin for applying a brake torque to the bobbin 25 on an output shaft of the gearbox 65. A hysteresis brake 67 as a brake is connected. In this embodiment, as shown in FIG. 4, the chain 64 is wound so as to simultaneously drive not only the sprocket 66 for the hysteresis brake 67 but also the sprocket 70 of the automatic balance weight position adjusting mechanism described below. Have been.
[0016]
2 to 5 and the like, reference numeral 80 denotes a balance weight position automatic adjustment mechanism. The automatic balance weight position adjusting mechanism 80 controls the remaining amount of the optical cable 9 remaining on the bobbin 25 (weight remaining) so that the weight with the bobbin 25 side is not balanced and the turning of the turning frame 24 does not lose smoothness. The position of the balance weight 87 is moved and adjusted corresponding to the amount of the weight guide shaft 81. The two weight guide shafts 81 fixed in a cantilever manner at a position on the opposite side of the revolving frame 24 from the position where the bobbin 25 is mounted. A weight moving screw 82 coaxial with the bobbin shaft 61 is rotatably mounted via mounting plates 83 and 84, and a weight moving female screw member 88 integrated with a balance weight 87 is screwed into the weight moving screw 82. By using the rotation of the bobbin 25, the weight moving screw 82 is rotationally driven to move the position of the balance weight 87 on the bobbin 25. It is configured to move adjusted to correspond to the remaining amount of the cable 9.
[0017]
When the bobbin 25 rotates, the rotation of the bobbin shaft 61 integrated with the bobbin 25 causes the weight moving screw 82 to input the rotation of the sprocket 63, the chain 64, the sprocket 70, and the sprocket 70 fixed to the bobbin shaft 61. The rotation is transmitted through a speed reducer 85, a sprocket 86 on the output side of the speed reducer 85, and a sprocket 89 fixed to the base end of the weight moving screw 82 in that order. The sprocket 63, the chain 64, the sprocket 70, the speed reducer 85, the sprocket 86, the sprocket 89 and the like constitute a bobbin rotation interlocking mechanism 160 that rotates the weight moving screw 82 in conjunction with the rotation of the bobbin 25.
[0018]
As shown in detail in FIG. 6, the weight moving screw 82 is provided near a bearing 167 rotatably supporting the weight moving screw 82 provided on the mounting plate 84 on the revolving frame 24 side (right side in FIG. 6). Is merely a shaft portion 82a having no screw formed therein. Therefore, when the weight moving female screw member 88 reaches the end of the weight moving screw 82 on the turning frame side, the weight moving screw member 88 comes off the screw portion of the weight moving screw 82. That is, at the position immediately before the balance weight 87 reaches the movement limit on the revolving frame side as shown in FIG. 6 integrally with the weight moving female screw member 88, the screwed state of the weight moving female screw member 88 and the weight moving screw 82 is changed. This is a configuration that is automatically canceled.
[0019]
The weight moving female screw member 88 has a semicircular female screw portion 88b as shown in FIG. 7 in order to return it to the start position on the weight moving screw 82 (that is, the position on the mounting plate 83 side). It is divided into two female screw member pieces 88a, and this is held by a mounting member 162 fixed to the balance weight 87 with bolts 161. In the illustrated example, both sides of each female screw member piece 88a are slidably fitted in a slide groove 162a provided in the mounting member 162, and are fixed to the balance weight 87 side with a pin 163. 164 and 165 are pin holes formed on the balance weight 87 side. When the pin 163 is inserted into the inner pin hole 164, it is in a normal internal thread state. When the pin 163 is inserted into the outer pin hole 165, two female screw member pieces 88a are set. As shown by the two-dot chain line, they are separated from each other. After returning the weight moving female screw member 88 to the start position in the separated state, a normal female screw state as shown by the solid line in FIG. 7 is established.
[0020]
In addition, a cushion material 166 such as rubber, which serves as a buffer when the balance weight 87 collides, is disposed on the outer surface of the mounting plate 84 on the side of the revolving frame 24. A bearing 167 rotatably supports the weight moving screw 82.
[0021]
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 maintaining a constant posture. An arm 93 is vertically rotatably mounted on the counterweight mounting plate 35 of the front portion 31 of the main body frame 23 via a hinge 92, and a counterweight 91 is fixed to the tip of the arm 93.
[0022]
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 near the power transmission tower 10, and is moved from the lower grooves a, b, c of the main body frame 23, the turning frame 24, the turning driven spur gear 49 and the like to the overhead wire 4. Is inserted into the center, and the traveling pulleys 26, 40, and 56 are placed on the overhead ground wire 4, thereby suspending the optical cable winding machine 21 on the overhead ground wire 4.
When the rope 22 hung on the rope locking portion 95 is pulled, the optical cable wrapping 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 wrapping 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. The rotation of the spur gear 46 is transmitted to the rotation driven spur gear 49 through two paths by two intermediate spur gears 47 and 48, and is integrated with the rotation driven spur gear 49. The turning frame 24 turns around the body frame 23, that is, around the overhead ground wire 4, and the bobbin 25 attached to the turning frame 24 turns around the overhead ground wire 4. On the other hand, as the optical cable winding machine 21 advances, the optical cable 9 wound around the bobbin 25 is drawn out, so that the optical cable 9 is spirally wound around the overhead ground wire 4.
[0023]
The rotation of the bobbin 25 is transmitted to the weight moving screw 82 via a bobbin rotation interlocking mechanism 160 such as a sprocket 63, a chain 64, a sprocket 70, a speed reducer 85, a sprocket 86, and a sprocket 89.
When the weight moving screw 82 rotates, the balance weight 87 integrated with the weight moving female screw member 88 screwed with the weight gradually moves toward the revolving frame 24 in accordance with the total rotation amount of the bobbin 25. Thus, the balance between the remaining amount of the optical cable 9 on the bobbin 25 and the moment is balanced.
[0024]
In the above-mentioned work of winding the optical cable 9, the balance weight 87 is set at a predetermined start position of the weight moving screw 82 in accordance with the amount (laying length) of the optical cable 9 wound around the bobbin 25. The start position may be calculated in advance and standardized for various conditions such as the size of the optical cable 9 and the installation length.
If the position of the balance weight 87 at the time of the start is erroneously set closer to the inside than the correct start position, the balance weight 87 reaches the revolving frame side movement limit before the bobbin 25 becomes empty. However, at this time, the weight moving screw member 88 integrated with the balance weight 87 comes off the screw portion of the weight moving screw 82 and comes on the simple shaft portion 82a as shown in FIG. And the balance weight 87 are released. Therefore, the weight moving screw 82 can rotate freely irrespective of the balance weight 87, and the revolving parts such as the revolving frame 24 and the bobbin 25 can rotate freely. The traveling pulley 26 driven by rotation can also rotate, and the optical cable winding machine 21 can be run by being towed by the tow rope 20.
Therefore, even if the start position of the balance weight 87 is incorrectly set, there is no trouble that the optical cable winding machine 21 does not move during the winding operation. That is, there is no problem that the optical cable winding machine 21 has to be forcibly pulled to the steel tower without turning the bobbin 25 and the turning frame 24 and keeping the traveling pulleys 26, 40, and 56 locked. Also, there is no problem that the optical cable 9 becomes waste and the traveling pulleys 26, 40 and 56 are damaged.
Further, since it is not necessary to provide a margin for the movement amount of the balance weight 87, the entire length of the weight moving screw 82 can be used to secure the necessary movement amount of the balance weight 87, and the weight of the apparatus is reduced as much as possible. be able to.
In addition, since the cushion member 166 is provided at a position where the balance weight 87 hits the mounting plate 84 on the revolving frame 24, unnecessary impact is not generated, and this point is also effective in preventing mechanical damage.
[0025]
Note that the transmission path for transmitting the rotation of the bobbin 25 to the sprocket 89 for moving the balance weight is a simplified example of the embodiment, and in actuality, the reduction ratio, the weight balance with the bobbin 25, and the like are considered. Perform the design that was made.
[0026]
Further , the structure that enables the weight moving female screw member 88 to return to the start position is not limited to the embodiment.
[0027]
【The invention's effect】
According to the present invention, at the position immediately before the balance weight in the automatic balance weight position adjusting mechanism reaches the movement limit on the revolving frame side, the threaded state between the weight moving female screw member and the weight moving screw is automatically released. As a result, the following effects are obtained.
(1) Even if the start position of the balance weight is mistakenly set at the start of the optical cable winding operation, there is no trouble that the optical cable winding machine stops working during the winding operation. There is no problem that the optical cable wrapping machine must be forcibly pulled to the tower without turning and the traveling pulley is locked, and the optical cable becomes waste or the traveling pulley is damaged There is no problem of receiving.
(2) Since there is no need to provide a margin for the movement amount of the balance weight, the entire length of the weight movement screw can be used to secure the necessary movement amount of the balance weight, and the weight of the device can be reduced as much as possible. it can.
[0028]
According to the second aspect, the operation of automatically releasing the threaded state between the weight moving female screw member and the weight moving screw can be reliably and smoothly performed with a simple mechanism.
[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 schematic view of a mechanism for transmitting rotation of the bobbin to a bobbin brake and an automatic balance weight position adjusting mechanism in the optical cable winding machine of FIG. 1;
FIG. 5 is a cross-sectional view (but partially omitted) taken along line AA of FIG. 2;
6 is a cross-sectional view showing a detailed structure of a female screw member for moving the weight when the balance weight is moved to the revolving frame side movement limit. FIG. 5 shows a state in which the balance weight is moved to the revolving frame side movement limit. It is BB sectional drawing of.
FIG. 7 is a view taken in the direction of the arrows CC in FIG. 6;
FIG. 8 is a diagram illustrating a situation in which the optical cable winding machine winds an optical cable around an overhead ground wire.
FIG. 9 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 31 front 32 rear 35 counterweight mounting plate 36 gear mounting Plate 37 Pulley support frame 40 Running pulley 41 Prevention rollers 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 Prevention roller 60 Bobbin support shaft 61 Bobbin shaft 62 Bearings 63, 66, 70 Sprocket 65 Gearbox 67 Hysteresis brake (bobbin brake)
80 Automatic balance weight position adjusting mechanism 81 Weight guide shaft 82 Weight moving screw 82a Cylindrical shaft portions 83, 84 Mounting plate 85 Reducer 86 Sprocket 87 Balance weight 88 Weight moving female screw member 88a Female screw member piece 88b Female screw portion 91 Counter weight 92 Hinge 93 Arm 95 Rope connecting part 160 Bobbin rotation interlocking mechanism 161 Bolt 162 Mounting member 162a Sliding groove 163 Pin 164, 165 Pin hole 166 Cushion material 167 Bearing

Claims (1)

An optical cable wrapping machine installed on an overhead ground line of an overhead power transmission line so as to be capable of traveling on the overhead ground line and winding an optical cable around the overhead ground line,
A body frame, a revolving frame rotatably mounted around the overhead ground wire outside the body frame, a bobbin for winding an optical cable rotatably mounted on the revolving frame, and riding on the overhead ground wire. A basic configuration including a traveling pulley attached to the main body frame, and a rotation transmission mechanism that transmits the rotation of the traveling pulley to the revolving frame and drives the revolving frame to rotate,
A weight moving screw having the same axis as the bobbin shaft at a position opposite to the bobbin mounting position of the revolving frame, and a weight moving female screw member screwed to the weight moving screw are integrally fixed to the bobbin. A balance weight set at an initial position corresponding to the amount of the optical cable to be wound; and a rotatably supporting the weight moving screw and supporting the balance weight so as to be able to move in parallel along the weight moving screw. A weight guide shaft fixed to the frame in a cantilever manner, and a bobbin rotation interlocking mechanism using only a conductive member for continuously transmitting force, which rotates the weight moving screw in conjunction with the rotation of the bobbin. in together when provided with a balance weight position automatic adjustment mechanism,
At a position immediately before the balance weight reaches the movement limit on the revolving frame side, the threaded state between the weight moving female screw member and the weight moving screw is automatically released , and the weight moving female screw is As a mechanism for automatically releasing the threaded state between the member and the weight moving screw, a shaft portion without a screw thread is formed near the end of the weight moving screw on the turning frame side to an overhead ground wire. Optical cable wrapping machine.

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