JP2000324632A - Work scaffold for work on the tower section of overhead power transmission lines - Google Patents

Abstract

(57) [Abstract] [Problem] To improve the efficiency of work at a steel tower section of an overhead power transmission line and reduce labor burden. SOLUTION: A work scaffold 11 has a connecting portion 14 having a hook portion that can be hooked on a horizontal arm member main member 1a of an arm member 1 of a steel tower at an upper end portion of a scaffold main column 13 having a scaffold plate 12 attached to a lower end portion. It is a configuration provided. 15 is a step. 2
Is the transmission line, 3 is the clamping clamp, 4 is the jumper socket,
5 is a jumper conductor, and 6 is a tension insulator series. When working on a steel tower for power system disconnection or reconnection in the event of a power outage or the like, an operator rides on the scaffold plate 12 and performs work such as mounting and removing the jumper socket 4. Since a scaffold can be secured and work can be performed in a stable posture, work is easy.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work scaffold for working on a tower section of an overhead transmission line used for working on a tower section of an overhead transmission line.

[0002]

2. Description of the Related Art In overhead transmission lines, for example,
In the event of an electrical accident such as a grounding accident or an induction accident, or in the case of maintenance or the like, it is necessary to perform work at the tower.
FIG. 9 shows the vicinity of an electric wire retaining portion of a tension tower in an overhead transmission line, where 1 is an arm of a tower, 2 is a transmission line, 3 is a clamping clamp, 4 is a jumper socket, and 5 is a jumper conductor. The transmission line 2 is retained on the arm 1 of the tower via a retaining clamp 3 and a tension insulator 6 which are compression-fixed to its end. The jumper conductor 5 is electrically connected between the transmission lines 2 on both sides of the tower by bolting the jumper sockets 4 fixed to both ends thereof to the retaining clamp 3.

For example, in the case of an overhead transmission line of about 66 KV, the distance L from the arm 1 to the retaining clamp 3 is, for example, about 1.0 to 1.2 m, and the vertical distance H of the center of the jumper conductor 5 from the arm 1. Is about 1.0 to 1.5 m,
When it becomes necessary to disconnect the system in such a tower part due to the electric accident or the like, remove the bolt of the jumper socket 4 bolted to the retaining clamp 3,
The jumper socket 4 is removed from the retaining clamp 3 to perform a system disconnection operation to open the jumper device. At the time of reconnection, a system reconnection operation of bolting the jumper socket 4 to the retaining clamp 3 is performed.

Conventionally, the work of the steel tower, such as the work of attaching and detaching the jumper socket 4 to and from the retaining clamp 3, is performed by an operator riding on the electric wire 2 or the insulator series 6,
Lean your body out of the tower or go to
As shown by the dashed line, the user runs on the ladder line 8.

[0005]

The work carried out while riding on the electric wire 2 or the insulator string 6 is performed while maintaining the posture, so that the workability is poor and the labor burden on the worker is large. In addition, since the work performed while leaning the body from the tower body is performed in an unstable posture, the workability is also poor, and the labor burden on the operator is also large. In addition, work performed using the lane ladder 8 is also poor in workability because the scaffold is not stable.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and improves the efficiency of work in a tower section of an overhead power transmission line,
It is another object of the present invention to reduce the labor burden on workers.

[0007]

According to a first aspect of the present invention, there is provided a work scaffold for working a steel tower section of an overhead power transmission line.
A connecting portion having a hook portion that can be hooked on a main arm member of a horizontal arm of a steel tower is provided at an upper end of a main pillar of a scaffold having a scaffold plate attached to a lower end thereof.

According to a second aspect of the present invention, there is provided a work scaffold for working a steel tower section of an overhead power transmission line, wherein an upper end of a main pillar of a scaffold having a scaffold plate attached to a lower end is provided near a tip end of a horizontal arm bar main member of a steel arm of a tower. In addition, it is rotatably attached to the tower side via a hinge mechanism.

According to a third aspect of the present invention, there is provided a work scaffold for work on a tower section of an overhead power transmission line, wherein an upper end of a scaffold main pole having a scaffold plate attached to a lower end is attached to a lower surface of a horizontal arm bar main member of a steel arm of the tower. It is characterized by being mounted movably along the rail to the mounted rail via a movable support mechanism.

[0010]

FIG. 1 is a block diagram showing an embodiment of the present invention.
This will be described with reference to FIGS. The work scaffold of the present invention is applied to a steel tower portion in which a position of a retaining clamp is not so far from a tower body, such as an overhead power transmission line of about 66 KV or the like. The configuration itself of the tower in each embodiment is shown in FIG.
1, FIG. 4, FIG. 5, FIG.
In the above, 1 is a steel tower arm, 2 is a transmission line (electric wire), 3
Is a clamp, 4 is a jumper socket, and 5 is a jumper conductor. The transmission line 2 is fastened to the armrest 1 of the tower via an anchor clamp 3 fixed to the end of the transmission line 2 and a tension insulator series 6, and a jumper socket 4 fixed to both ends of a jumper conductor 5 is bolted to the anchor clamp 3. And is electrically connected to the transmission line 2.

FIGS. 1 and 2 show an embodiment of a work scaffold 11 for work on a steel tower section according to claim 1. This work scaffold 11
It is a temporary and portable work scaffold, with a scaffold plate 1 at the lower end.
At the upper end of the scaffold main column 13 with the 2
And a connecting portion 14 having a hook portion 14 that can be hooked on the horizontal arm member main member 1a. The arm member 1 of the tower is provided with a main member 1a extending horizontally and an oblique member 1b extending obliquely downward on the tip side above the arm member 1a.
As shown in detail in FIG.
a is provided with a pair of hook portions 14a each of which can be hooked. Further, a step 15 for the worker to go up and down is fixed to the main scaffold 13.

When it becomes necessary to perform a system dividing operation or the like at the above-mentioned tower, the worker raises the above-mentioned work scaffold 11 to the arm 1 of the tower and attaches it to the arm member main member 1a. In this case, with the left and right hook portions 14a of the connecting portion 14 in the direction perpendicular to the direction of FIG. 14a
Is hooked on the left and right arm main members 1a as shown in FIG. If necessary, a means for fixing the hook portion 14a to the arm member main member 1a may be provided.

An operator puts his foot on the step 15 of the working scaffold 11 from the arm 1 and descends on the scaffold 12, and on this scaffold 12, removes the jumper socket 4 from the clamp 3 to disconnect the system. At the time of removal or reconnection, the jumper socket 4 is bolted to the anchor 3 and the like. As described above, since it is possible to secure the scaffolding and work in a stable posture, the electric wire
Work is easier, efficiency is improved, and the labor burden is lighter than the work performed in the air or on the insulator chain 6, or leaning out of the tower body, or using the cable ladder. Become. In addition, since the hook 14a of the connecting portion 14 can be easily hooked on the arm 1, the handle 14 is excellent in handleability as a temporary and portable work scaffold.

The scaffold plate 12 of the work scaffold 11 is short in length, but when a long scaffold plate 12 'is required as shown by a two-dot chain line in FIG. It is also possible to add a suspending tool 16 for hanging the 'on the main line (transmission line 2). In this case, it can be used as a work scaffold for a long jumper device in a soiled area or the like.

FIG. 3 shows another embodiment of the scaffold plate in the work scaffold 11.
A has left and right portions separated from each other, and is provided so as to be rotatable upward by a hinge shaft 17 provided at a lower end portion of the scaffold main column 13. Reference numeral 18 denotes a receiving portion that receives the scaffold plate 12A. In this embodiment, when not in use, the scaffold plate 12A
Is folded as shown by a two-dot chain line, so that it becomes compact and easy to carry.

The main pillar 13 of the work scaffold 11 described above.
Is a single ladder, but a ladder-type scaffold main column 13B in which a plurality of step members 19b are fixed between left and right vertical members 19a can be used as a work scaffold 11B shown in FIG.
Further, the scaffold plate 12B of the work scaffold 11B is the same as that of FIG.
In a similar manner to the structure described above, the left and right are separated from each other and can be folded upward as indicated by an arrow. With this ladder-type work scaffold 11B, the operation of moving up and down to the scaffold plate 12B is easy.

FIGS. 5 and 6 show an embodiment of a work scaffold 21 for work on a steel tower section according to claim 2. This work scaffold 21 is of a permanent type, that is, always installed on a steel tower,
The upper end of the scaffold main pillar 23 having the scaffold plate 22 attached to the lower end is located near the tip of the horizontal arm member main member 1a of the steel arm 1 of the tower.
This is a structure that is attached so as to be rotatable in the direction of the tower 10 via a hinge mechanism 24. The hinge mechanism 24 is, for example, shown in FIG.
As shown in the figure, the bearing member 24 fixed to the arm member main member 1a
This is a configuration in which the main scaffold pillar 23 is connected to the hinge shaft 24b supported by a. In addition, a mechanism is provided in which the pin 25 is inserted into a hole formed in the bearing member 24a and locked.

The work scaffold 21 holds the pins 25 during work.
And lock it in a vertical position.
And unlock the lock.
As shown by the dashed line, it is rotated upward and stored along the lower surface of the arm 1 (1a). The means for holding the main pillar 23 at the horizontal position indicated by the two-dot chain line in FIG. 6 is omitted, but an appropriate means such as attaching a hook to the tower body 10 side can be adopted. Also in the case of performing work on the steel tower using the work scaffold 21, work is easier, efficiency is improved, and labor burden is reduced as compared with the conventional work, as described above.

FIGS. 7 and 8 show an embodiment of a work scaffold 31 for work on a steel tower section according to a third aspect of the present invention. The work scaffold 31 is also of a permanent type, and the upper end of the scaffold main pillar 33 having a scaffold plate 32 attached to the lower end thereof is movably supported on a rail 35 attached to the lower surface of the horizontal arm member main member 1a of the steel arm 1 of the tower. It is configured to be movably mounted along the rail 35 via a mechanism 34. As shown in detail in FIG. 8, the movable support mechanism 34 in the illustrated example includes an upper flange 35 of an I-shaped or H-shaped rail member.
a is tightened and fixed to the main arm member 1a with a V-bolt 36 and a nut 37 to form a rail 35, and a frame portion 34b that rotatably supports a roller 34a that rides on a lower flange 35b of the rail 35 is an upper end of the scaffold main column 33. The configuration is fixed to. Since the work scaffold 31 of this embodiment can be moved along the rail 35 in the longitudinal direction of the arm 1, when not in use, the entire work scaffold 31 is drawn to the tower 10 side, and is moved along the tower 10. Can be stored together. This work scaffold 3
In the case of performing work on the steel tower section using No. 1, the work is easier and the efficiency is improved as compared with the conventional work, as described above.
Also, the labor burden is reduced.

[0020]

According to the work scaffold of the present invention, the work can be secured and the work can be performed in a stable posture, so that the work is easier and the efficiency is improved as compared with the conventional work method. Also, the labor burden is reduced.

According to the work scaffold of the first aspect, the hook can be easily hooked on the arm by the hook portion of the connecting portion, so that the work scaffold is excellent as a temporary and portable work scaffold. In addition, if the scaffold plate is foldable, it can be folded and compact when not in use, so that it is easy to carry and saves space for storage. In addition, it is possible to lengthen the scaffold plate by adding a suspending tool for hanging the scaffold plate on the main line of the transmission line, and as a work scaffold for a long jumper device section in a contaminated area or the like. It can be used.

According to the work scaffold of the second aspect, the work scaffold can be used as needed as a permanent work scaffold, and when not in use, the work scaffold can be swung upward to follow the arm. Therefore, it is not obstructive, is extremely easy to store, and has a simple structure. Further, by providing a lock mechanism for restricting the rotation of the main pillar of the scaffold, the scaffold becomes a fixed scaffold that does not move unintentionally, the scaffold is stabilized, and work efficiency is improved.

According to the third aspect, it can be used as a permanent work scaffold immediately when needed,
When not in use, the work scaffold can be moved in the longitudinal direction of the arm, so that it is not obstructed and storage is extremely simple.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows an embodiment of a work scaffold for work of a tower portion of the present invention, wherein (a) is a side view near a jumper device in a tower of an overhead power transmission line, and (b) is a tip of a metal arm of the tower. It is a top view of the vicinity.

FIG. 2 is an enlarged cross-sectional view of a main part taken along line AA of FIG.

FIG. 3 is an enlarged side view of a main part near the lower end of a main pillar of the scaffold, showing an embodiment in which a scaffold plate in the work scaffold for work on a steel tower is opened and closed.

FIG. 4 is a side view showing a ladder-type main scaffold of the work scaffold for work on the tower section, and is a side view of a vicinity of a jumper device in the tower.

FIG. 5 is a front view of a main part of a steel tower in the vicinity of a ferrule, showing an embodiment in which a main scaffold is attached via a hinge mechanism.

FIG. 6 is an enlarged view of a hinge mechanism in FIG.

FIG. 7 is a front view of a main part of a steel tower in the vicinity of the arm bar, showing an embodiment in which the main pillar of the scaffold is movably mounted along a rail fixed to the arm bar.

FIG. 8 is an enlarged cross-sectional view near the rail in FIG. 7;

FIG. 9 is a diagram for explaining a conventional example, and is a side view near a jumper device in a tower of an overhead transmission line.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Arm metal 1a Arm metal main material 2 Transmission line 3 Retention clamp 4 Jumper socket 5 Jumper conductor 6 Insulator string 10 Tower body 11, 11B, 21, 31 Work scaffold 12, 12A, 12B, 22, 32 Scaffolding board 13, 13B, 23, 33 Scaffolding main pillar 14 Connecting part 14a Hook part 15 Step 16 Hanging tool 17 Hinge shaft 18 Receiving part 19a Vertical member 19b Step member 24 Hinge mechanism 24a Bearing member 24b Hinge shaft 34 Movable support mechanism 34a Roller 34b Frame part 35 Rail 36 V bolt

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Sakae Oba 1-5-1 Kiba, Koto-ku, Tokyo Inside Fujikura Co., Ltd. (72) Inventor Kazushi Nakauchi 1-1-3 Uchisaiwaicho, Chiyoda-ku, Tokyo Tokyo Electric Power Company Stock Inside the Company (72) Inventor Takeshi Ishibashi 1-1-3 Uchisaiwaicho, Chiyoda-ku, Tokyo Tokyo Electric Power Company, Inc. (72) Inventor Toshimitsu Tezuka 1-1-3 Uchisaiwaicho, Chiyoda-ku, Tokyo Tokyo Electric Power Company, Inc.

Claims (3)

[Claims] 1. An aerial transport comprising a connecting portion having a hook portion which can be hooked on a horizontal arm bar main member of a steel tower arm bar at an upper end portion of a main pillar of a scaffold having a scaffold plate attached to a lower end portion thereof. A work scaffold for work on the electric tower. 2. An upper end of a main pillar of a scaffold having a scaffold plate attached to a lower end thereof, near a front end of a horizontal arm bar main member of a steel arm of a tower.
A work scaffold for work on a steel tower section of an overhead power transmission line, wherein the work scaffold is attached rotatably in a tower direction via a hinge mechanism. 3. An upper end of a main scaffold having a scaffold plate attached to a lower end thereof is moved along a rail attached to a lower surface of a horizontal arm member main member of a steel arm of a steel tower via a movable support mechanism. A work scaffold for work on a tower section of an overhead power transmission line, which is attached as possible.