JPH0691690B2 - Wire support - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric wire supporter generally called an overhead wire car, and more particularly to a detention clamp used in a joint portion for each tight line section in a prefabricated overhead wire. The present invention relates to an electric wire support that facilitates passage through a rigid body part.

In this specification, the term "electric wire" may include not only an ordinary power transmission line but also a communication cable such as an optical fiber cable, or various wires or ropes used in a wire drawing operation. There is.

<Problems to be Solved by Conventional Techniques and Inventions> Overhead power transmission lines are supported by steel towers at regular intervals.The form of support by this steel tower is to use a towing clamp and to suspend by simply hanging. There is.

And in the prefabricated overhead line, which is increasing in recent years,
The electric wire is extended in a state in which the tension clamp is connected to the joint portion for each of the tight-fitting sections in advance.

However, although the tension clamp P is rigid, its bending strength is not so large. Therefore, Fig. 4 (a)
As shown in (c), when the electric wire C passes through the electric wire supporter K in which a large catenary angle Θ is generated, it is deformed or damaged due to a shock due to an intrusion resistance or a large bending force. I will end up. In the figure, H is a horizontal line.

As a means to deal with this, the wire clamp itself is covered and protected by a reinforcing material called protector, and the wire support itself is designed so that a large bending force is not applied when passing through the wire clamp by devising the wire support. There are some that make appropriate movements.

As a type to devise a wire support device, for example,
53-47592, Jitsuko Sho 53-34554, Japanese Examined Sho 55-20447
No. 54-150995, No. 59-15204, and the like. However, the models of Japanese Utility Model Publication No. 53-47592 and Japanese Utility Model Publication No. 59-15204 can operate without any external operation, but the formation of the penetration angle according to the catenary angle is insufficient, so a large shock due to the penetration resistance of the joint part is generated. Occurrence is unavoidable, or recovery from the state after operating according to the passage of the joint does not always work well, or if the catenary angle is large, it may not always operate as required. There are not enough points. In addition, all other things
Since external operation is required for recovery, this external operation mechanism is not always satisfactory because the external operation mechanism becomes complicated and large, and it is difficult to balance the drawing speed with the external operation timing.

Therefore, in the past, the protector method has been the mainstream.

However, the protector is considerably difficult to mount, and at the same time, it is even more difficult to remove the protector when it is to be retracted on the tower. For example, a protector for 810 mm ² weighs 60 kg each, and this is handled at a height of several tens of meters above the ground.

In addition, recently, the number of depots has increased due to the circumstances of the site, etc., and the number of times the protector is mounted and removed has tended to increase accordingly.

And such a situation makes the demand for a system that does not require a protector stronger.

Therefore, it was this invention that was made at all times, regardless of the catenary angle, the intrusion resistance of the joint portion is always small, the bending force beyond the allowable range is not applied to the retention clamp, and the joint portion (EN) Provided is an electric wire supporter in which an operation required according to passage is performed without an external operation and at the same time, a problem of returning to a post-operation state does not occur.

<Means for Solving the Problem> Specifically, an electric wire supporter used for supporting passage of a linear object such as an electric wire that is being drawn in a state of being hung on a tower during wire drawing work. A pair of front and rear support members that are provided with a rotating body for supporting passing objects and are provided symmetrically on the inlet side and the outlet side, a connecting member that connects the two supporting members, and a hanging member for hanging the steel tower. Becomes
The two supporting members are connected to each other by a connecting member that hinges one ends at a position that is offset from the center by a certain distance to the upper end. The suspension member has one end side connected to the substantially central portion of the connecting member, and the rigid body portion is connected to the rigid body portion when connecting the linear body. The electric wire support device is provided in such a manner that when the support member is placed on the upper end portion of the support member, the support member rotates in a direction toward the horizontal direction with the connection point with the connection member as a fulcrum.

<Operation> The electric wire support having such a structure satisfies the above-mentioned requirements, in part, as long as the support member for supporting the passing object is always in the electric wire passing state, The point is that the penetration angle that does not cause resistance to penetration, that is, the penetration angle that is the same as the catenary angle, is maintained. The point is that the bending force beyond the allowable range is not applied to the tension clamp due to the continuous angle change of the support member.

That is, since both supporting members are hingedly connected by the connecting member at a position offset from the center to the upper end by a certain distance, the load applied to the whole, particularly the upper end of each supporting member is the same, that is, the flexible member. As long as an electric wire that is flexible and is easily fitted to the support member passes through and the upper end of each support member receives a load evenly from this electric wire, the connection point between each support member and the connection member is used as a fulcrum. The moment always acts so as to balance in the direction in which each support member takes an inclined state with the upper side facing upward, so both support members take an inclined state that is almost familiar with the catenary angle and it is easy to enter the joint part. Holds the penetration angle.

On the other hand, when the joint part passes, both the entrance side and the exit side supporting members are sequentially fixed by the rigid retracting clamps.
The load receiving points change such that the load receiving point is changed from the lower side of the entrance side support member to the upper side of the entrance side support member to the upper side of the exit side support member to the lower side of the exit side support member. This uneven load, especially the load at the upper end of the support member, is the bending force for the tension clamp, but both support members are hinged by the connecting member, and these members form a link-like structure. Since it is like this,
Only a slight uneven load required for the link-like operation is applied to the upper end of the support member, and the respective support members correspondingly perform the link-like operation with each other to easily and continuously change the angle. Pass through the detention clamp without being subjected to unacceptable bending forces.

<Example> Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing the outline of the electric wire support device according to the first embodiment. As can be seen from this, the electric wire support 1 is provided with a pair of supporting members 2i and 2o for supporting and passing a passing object (electric wire C, detention clamp P, etc.) on the inlet side and the outlet side. The supporting members 2i and 2o are connected by a connecting member 3 in a link shape.

Wheels 5u and 5l are attached to the upper and lower ends of the support members 2i and 2o as "rotating bodies" in order to facilitate the support and passage of passing objects.

Each of the connecting members 3 is formed by connecting and fixing both ends of a pair of member pieces 6, 6 arranged on the left and right of the supporting members 2i, 2o by shafts 8, 8, respectively.

The support members 2i, 2o and the connecting member 3 are connected by a hinge connection via the shafts 8, 8 so as to form a link-like structure. The connecting points 10i and 10o are the centers S of the supporting members 2i and 2o, respectively.
The point is that they are positioned (offset) at a certain distance toward the upper end.

As will be understood from the description of the operation described later, the offset amount E is in a range such that the supporting members 2i and 2o can provide the balance necessary for the link-like operation for maintaining the inclined state in which the supporting members 2i and 2o are adapted to the catenary angle Θ of the electric wire C. , Support member 2i, 2o wheel
When an uneven load is applied to 5u, the link-like structure can perform the link-like operation with a load as small as possible.

More specifically, the more the inclination state of the support members 2i, 2o adjusts to the catenary angle Θ, the smaller the load applied to the wheel 5l becomes smaller than the load applied to the wheel 5u, but in such a relationship, the connection points 10i, 10o Both the upper and lower moments X and Y having the fulcrum as the fulcrum satisfy the relationship required to give the supporting members 2i and 2o a tilted state in relation to the catenary angle Θ, and at the same time, the joint portion is the wheel 5u. The load is set as an offset amount that satisfies the relationship that the load required for the link-like operation that occurs when the vehicle rides on is within the allowable deformation resistance range of the joint portion.

The specific numerical values are individually given in relation to the actual catenary angle under the conditions of the steel tower to be used, and are omitted here.

The length of each support member 2i, 2o and the distance between both wheels 5u, 5u at the upper end are substantially the same, and are each slightly longer than the length of the retention clamp P. This is because a bending load is likely to be applied to the towing clamp P when the towing clamp P straddles the two wheels, and this is to avoid this.

The electric wire support 1 is hung on a steel tower via a suspension member 13. The suspension member 13 has its tip end hinged to a central portion of the connecting member 3 via a shaft 14. It is connected. The reason why the hanging member 13 is hinge-coupled to the connecting member 3 in this manner is to absorb the "runout" in the front-rear direction caused by the passage of an electric wire or a joint portion. The combination is not always essential.

The operating state of the wire support 1 will be described below with reference to FIG. The operation state shown in FIG. 2 is a principled state, and is slightly different from the actual state.

One of the features of this wire support 1 is that the support members 2i, 2o
However, it always keeps the penetration angle according to the catenary angle Θ that does not cause resistance to the penetration of the joint part. This is because the supporting members 2i and 2o are continuously changed in angle by a large load, and thus the bending force beyond the allowable range is not applied to the towing clamp P.

Specifically, the pair of support members 2i and 2o are connected by a connecting member 3 in a link shape, and the support members 2i and 2o and the connecting member 3 are connected.
Since the connection points 10i and 10o with and are offset from the center of the support members 2i and 2o by a predetermined distance, the pair of support members 2i and 2o have the same load applied to the wheels 5u and 5u at the respective upper ends. Yes, that is, it has flexibility and has support members 2i, 2o
On the other hand, as long as the electric wire C, which is easy to get used to, passes through and the load received from the electric wire C is evenly applied to both wheels 5u, 5u, the connection point 10 between each support member 2i, 2o and the connection member 3
The moments such as the arrow X and the arrow Y, which have i and 10o as fulcrums, always act so as to balance in the direction in which the respective support members 2i and 2o take an inclined state with the upper side facing upward, so both support members 2i , 2o takes an inclined state that is almost familiar with the catenary angle Θ and holds the penetration angle that facilitates the penetration of the joint part.

On the other hand, when the joint portion passes, the supporting members 2i and 2o are sequentially moved from the wheel 5l to the wheel 5u by the retracting clamp P which is a rigid body as shown in FIGS. 2 (b) to (f). → Wheel 5u → Wheel 5l As the load receiving points change, the upper and lower sides receive uneven loads.

This uneven load, especially the load on the wheel 5u, acts as a bending force for the tension clamp P.
Since i and 2o have a link-like structure, each supporting member 2i and 2o responds to each other in a link-like operation by only applying a slight uneven load required for the link-like operation to the wheel 5u. By doing so, the angle is easily and continuously changed [Fig. 2 (c), (e)]. As a result, the detention clamp P at the joint portion receives a bending force equal to or more than the load required to induce the link-like operation (this bending force is within a range that can be sufficiently endured by a normal detention clamp). Go through without.

Although this embodiment relates to the "single type" in which only one supporting member is provided, the present invention is also applied to the "multiple type" in which the supporting members connected in a chain are provided as a pair. Of course, it is possible.

The example shown in FIG. 3 is an electric wire holder 20 according to the second embodiment.
Is.

In this wire support 20, a plurality of segments 21, 21, ...
The chain body 22 connecting the plurality of support rollers 23, 23, ...
It is characterized in that the caterpillar structure 24 supported by ... Is made to be a "rotating body", so that it is easier to support and pass a passing object. However, in this example, the support roller 23 is provided on the support members 2i and 2o side, but
Of course, it is also possible to provide it in 21 itself. still,
Since the other points are substantially the same as those of the first embodiment, the common portions are denoted by the same reference numerals, and the duplicated description will be omitted.

<Effects of the Invention> As described above, in the electric wire support according to the present invention, both the inlet-side support member and the outlet-side support member provided with the rotating body for supporting a passing object have a link-like structure using a connecting member. Since they are connected and the connecting point between the supporting member and the connecting member is positioned at a certain distance from the center of the supporting member toward the upper end side, the following effects are obtained.

(A) The support member can always keep the penetration angle according to the catenary angle so that resistance does not occur against the penetration of the joint portion, and with a slight force received from the joint portion when passing through the joint portion. Since the bending force beyond the allowable range is not applied to the detention clamp by continuously changing the angle, the penetration resistance of the joint part is always small and the detention clamp is allowed regardless of the catenary angle. Bending force beyond the range is not applied.

Therefore, the protection by the protector for preventing the damage of the towing clamp is not required, and it is possible to eliminate the time-consuming and labor-intensive work of mounting and dismounting the protector, which contributes to a great rationalization of the prefabricated overhead wire work.

(B) In addition, since the operation required according to the passage of the joint portion is performed without external operation, there is no problem of complexity and size due to the external operation mechanism, and it has excellent functions but is compact and easy to use. easy.

(C) Furthermore, since there is no problem of returning to the post-operation state, stable wire extension is always possible.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of an electric wire support according to the first embodiment, FIGS. 2 (a) to (f) are operational state explanatory views of the electric wire support, and FIG. 3 is a second embodiment. A schematic side view of such an electric wire support,
FIGS. 4 (a) to 4 (c) are explanatory views of a state in which the electric wire supporter passes through the joint portion in the conventional overhead wire work. 1, 20 ...... Wire support 2i, 2o ...... Support member 3 ...... Connection member 5l, 5u ...... Wheel (rotating body) 13 ...... Suspension member 21 ...... Segment 22 ...... Chain body 23 ...... Support roller 24 ...... Caterpillar structure (rotating body)

Claims (2)

[Claims] 1. An electric wire holder used for supporting passage of a linear body such as an electric wire which is being hung on a steel tower or the like during a wire-drawing operation, each of which is provided with a rotating body for supporting a passing object. Consisting of a pair of front and rear support members symmetrically provided as the side and the output side, a connecting member connecting the both support members, and a suspension member for suspending the steel tower,
The two supporting members are connected to each other by the connecting member that hinges one ends at a position offset from the center by a certain distance to the upper end, so that, as a basic state, the catenaries of linear bodies that are substantially symmetrical to each other and pass through. The suspension member is adapted to take an inclined state of an angle, and the suspension member has one end side connected to the substantially central portion of the connection member, and the rigid body portion is connected when the rigid body portion connecting the linear bodies is passed. By being on the upper end of one of the support members,
An electric wire support characterized in that the support member is configured to rotate in a direction approaching horizontal with a connection point with the connection member as a fulcrum. 2. The electric wire supporter according to claim 1, wherein the rotating body is a caterpillar structure in which a chain body in which a plurality of segments are connected is supported by a plurality of support rollers.