JP2002152933A - Method of engineering work using scaffolding net - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem of the operation of opening a jumper wire in emergency situation, which must be conducted by a personnel from a concerned party managed directly by a power company, but which has increasingly been outsourced and subcontracted to subcontractors whose personnel are less skilled because of the need to swiftly perform the operation and there is apprehension that it will take more time than ever to perform the operation, because increase in the diameter of electric wires has made the operation require more and more physical strength and because the conventional jumpers are constructed so that tools are difficult to be used therefore, without opening operation taken into consideration. SOLUTION: A net-like scaffold (lean-out net) is so designed that, when a worker thrusts forward his body to work on a string of insulators as one process of jumper wire opening operation in an emergency, he can secure a foothold thereon. The scaffolding net is light in weight and compact, easy to carry, and set by operation of an expandable operating rod from a tower body, reduces operations in a midair, is installed in safety and stretched under a string of insulators throughout the string, eliminates workers' sense of insecurity, and thus enables reduction in the overall time of work.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention is used for repair work on transmission lines, and is particularly used for retransmission failure accidents.
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a net-shaped scaffold that is used between a tower body and the end of an insulator series when an accidental tower jumper is opened to break a transmission line section in an emergency, and a construction method using the same.

[0002]

2. Description of the Related Art In the event of an accident in which transmission towers, insulators, electric wires, etc. are damaged and retransmission failure occurs, the accident section is divided for the purpose of quick recovery. And emergency power transmission via another system. In order to divide the accident system, work to open the jumper line of the tower is performed. It is difficult to secure skilled construction personnel in the emergency jumper opening work because of the emergency, and the tools that can be brought are limited, apart from the steel tower where vehicles can enter. At the time of work such as tightening work on a steel tower during construction, a metal scaffold ladder H having a base end attached to a tower body T as shown in FIG.
Emergency repair work was to hook on the new electric wire C temporarily held on the tower body, embark on it, and carry out the work of connecting the insulator chain G or the nearby work, but large equipment such as winches can not be brought in. In, many issues remained. In small towers, the distance to the jumper position is short, and there is a part where the jumper can be opened remotely by using a telescopic operation rod from inside the tower, but not all operations are completed by the operation rod, and insulators are not used. Some work had to be started with a single safety rope. On large-scale towers, it was inevitable to get into the insulator chain from the arm end. This embarking work is dangerous even at high altitudes, and is difficult even for skilled workers. In emergency repair work, there is no time to select workers, and a construction method that can be performed by ordinary workers has been desired.

[0003]

SUMMARY OF THE INVENTION The present invention proposes a method in which a jumper can be safely opened by setting a net below the insulator series and moving the insulator series as a handrail on the net. Specifically, a hook for remote locking is provided at both corners of the tip of the rectangular polypropylene net, and this hook is locked from the inside of the tower to the insulator connecting tip with an operating rod, and the base of the net is fixed to the tower Then, the worker moves on this to perform necessary work. The net stretched widely between the tower body and the tip of the insulator series gives workers a sense of security because they cover the path of movement widely to the left and right. It cannot be reached. The net is housed in a backpack-like storage bag, and the operating rod is provided with a shoulder belt, so that the vehicle can be transported on mountain roads where vehicles cannot enter, or when climbing a tower.

[0004]

An embodiment of the present invention will be described. As shown in FIG. 1, hooks 2 and 3 are connected to the bottom two corners of a substantially trapezoidal net N knitted with a polypropylene spun yarn twisted rope for weight reduction. The hooks 2 and 3 are locked to the insulator string G and the electric wire C as shown in FIG. 10, and the net portion, which is the upper side of the trapezoid, is used by being tied to the tower body. The trapezoidal shape of the net N is because the portion that protrudes from the tower body does not need to be so wide, and a wider side to be locked to the electric wire is more suitable for work. The hooks 2 and 3 adopt a special structure to enable the hooks 2 and 3 to be disengaged by the operation rod S.

[0005] One hook will be described with reference to Figs. This hook 2 has a large effective locking diameter and is used for locking the insulator series G. What is required is a diameter that can be locked to the insulator, and the lateral displacement after locking is considered. No need. The large-diameter hook 2 has a hook body 21 provided at its base end with a untwist metal fitting 29 connected to the net N, a cap 24 for closing the hook portion 20 and a hook body rotatably connected to the tip of the cap 24. It comprises a connecting bar 26 extending across the back of 21. A suspension ring portion 28 is provided at the tip of the connection bar 26, and a sliding member 22 and a locking pin 23 are provided on a hook body 21 where the connection bar 26 intersects the back of the hook. Connecting bar 26
Moves between the two. The cap 24 may be any as long as it closes the mouth of the hook 20,
A steel body such as a bar may be used. When the hanging ring 28 is hung by the tip fitting S1 attached to the tip of the operating rod S, the connecting bar 26
The cap 24 that moves while sliding on the
Is rotated. Therefore, the hook 20 of the hook 2 is opened, and the hook can be received. This locking object is an insulator series G in the present application. When the engagement with the insulator string G is completed, lifting with the operation rod S is released. Then, the cap 24 is closed by a spring constantly biased in the direction of closing the hook, and the locking portion 27 formed of a notch provided at the intermediate portion of the connecting bar and at the back of the hook body 21 is locked by the locking pin 23. To lock the movement of the connecting bar 26,
Therefore, rotation of the cap 24, which is the same body, is prevented.

The small-diameter hook 3 shown in FIGS. 5 to 7 has basically the same configuration. The hook 3 is intended to be locked to the electric wire C portion, and has a small diameter, but has a structure in which a locked object in the hook is pressed by the opening / closing cap 34 so that the locked position does not move. A link mechanism is added to the connecting portion between the suspension ring portion 40 and the opening / closing cap 34 to make the hook closing position of the opening / closing cap 34 variable, and the lock in the hook 32 is opened / closed by the load of the net weight.
The structure that 34 presses is adopted. A long hole 33 is provided at the lower end of the hook body 31, and the untwist fitting 45 is provided.
Is movably connected to the elongated hole 33, and
Open and close the tip of the slot in the slot 45.
A configuration is adopted in which the shafts 42 are simultaneously engaged with the shaft 40 to perform operations related to each other. The tip of the hook main body 31 is bent into a hook 32, and an opening / closing cap 34 for closing the hook 32 is provided on the back of the main body by a shaft 35.
The opening / closing cap 34 is bent in a substantially U-shape.
The 32 tip is accommodated in this U-shaped space. A projecting side 36 at the other end of the opening / closing cap 34 projecting from the back of the main body 31
And the link 41 are simultaneously stopped by the shaft 42. The other end of this link 41 is a long hole of the untwist fitting 45 as described above.
Connected to the end located within 33.

With the above construction, when the suspension ring 40 is lifted, the opening / closing cap 34 is rotated, the hook is opened, and the untwisting metal fitting 45 connected by the link 41 also moves in the elongated hole 33 in the direction of the hook 32. Move to. When a load is applied to the untwist fitting 45 by this operation, that is, when the net N is connected, the opening / closing cap 34 rotates in a direction to further narrow the closed range from the position where the hook is closed. Therefore, the electric wire C in the hook portion 32 is strongly pressed, and the locking position of the net N to the electric wire C is fixed.

FIGS. 8 and 9 show a tower T, an electric wire C, and an insulator string G.
5 shows a connection belt B used for connection with the connection belt. A carabiner 5 is provided at one end and a buckle 7 is provided at an intermediate portion. It is wound around the tower of the steel tower T, and the tip of the belt 6 is inserted into the buckle 7 and fixed, and the carabiner 5 is locked to the mesh of the net. Normally, one by one is connected and fixed at each corner of the net N, but it is used in an increased number depending on the situation. It is also connected to the middle part of the side of the net N on the insulator string G side in a similar manner depending on the situation, and is fixed to the insulator string G or the electric wire C. If the number of the connection belts B is increased, the mesh of the slack and deformed net approaches a square, and it becomes easy to put a foot on the net. Therefore, it is desirable to use as many as possible. FIG. 10 shows a state where the net N is attached to the steel tower T in this way.

The operation rod S shown in FIG. 1 is made of glass fiber and is of an extendable type having a structure in which thin pipes are sequentially accommodated therein. A tip fitting S1 is provided. In addition, a shoulder belt S2 is provided in consideration of carrying.

[0010] The net scaffold composed of the above components is accommodated in a backpack-like storage bag. Upon arriving at the tower T at the site, the person climbs up the tower or, if the situation permits, carries it over the tower using a pulley. When mounting, extend the operating rod S and attach the tip fitting S1.
And hook it with a large diameter hook 2 to lock it to the insulator string G. First, the hook 2 does not move irrespective of its inclination by being locked to the insulator series G, so that the next hook locking operation for locking the electric wire 3 becomes easy. If the small-diameter hook 3 is locked to the electric wire C, the end of the net N is pulled toward the tower body,
The predetermined position is tied up by the connecting belt B. At this time, if the net N has an extra length due to the scale and shape of the steel tower T, the locking position of the carabiner 5 of the connecting belt B does not need to be the peripheral rope of the net N, and is locked at a suitable position. At the time of this Internet expansion, care should be taken to minimize slack. If the worker gets out, it naturally extends downward, and if there is more slack than at the time of installation, the work becomes difficult. When the extension is completed, a predetermined number of connecting belts B are arranged on the side of the net N locked to the insulator string G and the electric wire C before the work is started, and the belt is tightened. During such work, it is desirable to take safety measures such as safety belts and moving ropes, etc., in case of emergency. When the above preparation is completed, the opening operation of the jumper wire J is performed, but when the operation is completed, the housing is performed in a procedure reverse to that at the time of installation.

[0011]

As described above, the use of the net scaffold of the present invention makes it possible to safely perform the work on the tower at the time of emergency repair work with the attendant effect of shortening the time. With conventional scaffold ladders, it was a difficult task to transport on the tower, but this application can be carried on the back when climbing the tower, and even after installation, there is a wide margin on both sides of the movement path In addition, the psychological burden of working at heights is greatly reduced, and work efficiency is improved. In the past, it was an issue to select workers in emergency situations.However, even if you are not a skilled high-level work specialist, if you have a certain level of experience, you can easily embark on the insulator chain, so that accident recovery can be completed in a short time. Can be done with It can be used not only for emergency restoration work, but also for new transmission lines.

[Brief description of the drawings]

FIG. 1 is a front view of one set of the present net scaffold.

FIG. 2 is a front view of a large-diameter hook used for the net scaffold of the present application.

FIG. 3 is a left side view of a large-diameter hook used for the net scaffold of the present application.

FIG. 4 is a front view showing a state where a large-diameter hook used for the net scaffold of the present application is suspended.

FIG. 5 is a front view of a small-diameter hook used for the net scaffold of the present application.

FIG. 6 is a right side view of a small-diameter hook used for the net scaffold of the present application.

FIG. 7 is a front view showing a state where a small-diameter hook used for the net scaffold of the present application is suspended.

FIG. 8 is a front view of a tension belt used for the net scaffold of the present application.

FIG. 9 is a left side view of the tension belt used for the net scaffold of the present application.

FIG. 10 is a front view of the attached state of the net scaffold of the present application.

FIG. 11 is a plan view showing an attached state of a conventional ladder-type scaffold.

[Explanation of symbols]

 B Connecting belt C Electric wire G Insulator series H Scaffold ladder J Jumper wire N Net S Operating rod T Steel tower 2 Large diameter hook 3 Small diameter hook 5 Carabiner 6 Belt 7 Buckle 20 Hook 21 Hook body 22 Hook body 22 Sliding material 23 Lock pin 24 Cap 25 Support shaft 26 Connecting bar 27 Locking part 28 Suspension ring part 29 Twist return bracket 31 Hook body 32 Hook part 33 Long hole 34 Opening / closing cap 35 Axis 36 Projection piece 40 Suspension ring 41 Link 42 Axis 44 Axis 45 Twist return fixture

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Teruo Ogawa 4-33, Shibaura, Minato-ku, Tokyo Inside Seki Electric Works Co., Ltd. (72) Inventor Mitsuo Ueda 2 Fuji at 1573 Uekitino, Takino-cho, Kato-gun, Hyogo Prefecture Idenko Co., Ltd.

Claims (4)

[Claims] An operation is performed by connecting one end of a substantially rectangular net formed of a lightweight mesh to a tower body to a tower body, and connecting hooks which can be remotely operated and detached by operating rods to both corners of the other end. After securing to the insulator series and electric wire with a rod and attaching the net,
A construction method using a net scaffold, wherein the work is performed by moving on a net, and after the work, the hook is opened with an operating rod and removed from a locking object. 2. A hook portion is opened by applying a lifting force to a suspension ring portion at both ends of one side of a substantially square net formed of a predetermined mesh with a rope of polypropylene spun yarn. A net scaffold consisting of connecting a hook that closes the part and providing a belt on the other side of the net that binds to the tower. 3. A hook main body having a hook portion at a distal end portion and a twist-return metal fitting connected to a net at a base end portion, and a closing bias of the hook portion at an intermediate portion. A connection bar that is rotatably connected and extends across the back of the hook body, and a suspension ring portion is provided at the tip of the connection bar. The hook body at the portion where the connecting bar intersects the back of the hook is provided with a sliding member and a locking pin, and the connecting bar is configured to move between the two. The bar pivots the integrally connected cap while sliding to release the hook of the hook,
The hook according to claim 1, wherein when the suspension of the suspension ring is stopped, the hook portion of the cap is kept closed by a load of the net connected to the untwist fitting. 4. 4. The hook that locks to the insulator series has a large effective locking diameter of the hook portion, and the hook that locks to the electric wire has a small effective locking diameter. The hook according to any one of claims 1 to 3, wherein a link mechanism is provided in the connecting portion so that the hook opening / closing position of the cap is variable.