JP3411898B2 - Leader for cable pulling rope insertion of spiral cable support - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a case where a cable is installed between utility poles by being supported and supported by a suspension wire (messenger wire) installed between utility poles or a spiral cable supporting tool suspended on a self-supporting cable. , A cable tow rope that moves the cable along a spiral cable support,
The present invention relates to a cable pulling rope insertion leading tool of a spiral cable support, which is used for penetrating the spiral cable support and stretching it between the electric poles.

[0002]

2. Description of the Related Art For example, as disclosed in Japanese Patent No. 3002872, a tapered leading member is provided at the front end of a main rod and a focusing member is provided at the rear end thereof, and the leading member and the focusing member are provided between the leading member and the focusing member. There is a structure in which a plurality of elastic rods bent in a plurality of arcs are arranged side by side in the circumferential direction of the main rod.

[0003]

In the above-mentioned conventional example, when the elastic rod is caught on the spiral cable support, the focusing member retreats and the arc shape of the elastic rod is deformed (so that it becomes a loose arc).
In order to forcefully reduce the outer diameter of the entire elastic rod, the external force applied to the bundling material when the elastic rod is caught by the cable support is Since the focusing material is not necessarily moved back in the direction along the axis, the focusing material is not smoothly retracted, and further, the focusing material is retreated by an external force to deform the arcuate one into a linear structure. Deformation of the elastic rod is difficult.

[0004]

An expansion forcing member is provided at the tip of a main rod, and a cylindrical main body of a support piece is attached to a threaded rod portion of the expansion forcing member, and one end in a direction along an axis thereof is described above. It is selectively arranged on the side of the expansion forcing member or on the side of the tapered leading member that is screwed onto the tip of the threaded rod portion, and is assembled so that the threaded rod portion is penetrated, and the one end of the main body portion is attached. A base portion of an appropriate number of elastic rods, which come into contact with the peripheral surface of the expansion forcing member and separate from each other, is fixed to the bearing portion provided so as to be rotatable in the direction along the axis. The basic means is that the focusing rings, whose tip ends are loosely engaged independently of each other, are rotatably engaged coaxially with the rear end side of the main body rod to which the pushing tool is connected.

A weight member is provided on the rear end side of the main rod (in the embodiment, the main rod is made up of a solid rod rod made of metal and the rear connecting rod is coaxially connected to the main rod. Constitute)
By disposing the center of gravity on the rear side and preventing the tip side from being directed downward, it is possible to prevent disengagement from the support.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The drawings show an embodiment of a cable pulling rope insertion leading tool for a spiral cable support according to the present invention, FIG. 1 is a front view, and FIG. 2 is a partially cutaway front view of the front side, 3 is an enlarged view of a part of FIG. 2, FIG. 4 is a partially cutaway front view of a rear side, FIG. 5 is a front view showing a relationship between a support piece and an elastic rod, and FIG. 6 is a schematic illustration showing a use state. It is a figure.

In the figure, reference numeral 1 denotes a main rod of a leading tool A, and the main rod 1 has a spiral pitch of at least 1.5 times or more the spiral pitch of a spiral cable support S suspended from a utility pole d on a suspension line m. It is configured by fitting the connecting rods 2 and 3 on the front and rear ends of a cylindrical body 1A having a length so as to be on the axis.

The front connecting rod 2 has a screw portion 2a and a fitting portion 2b.
And a hexagonal tool locking portion 2c between the rod body, the fitting portion 2b is inserted into the cylindrical body 1A, and the screw portion 2a is projected from the cylindrical body 1A via the tool locking portion 2c. The expansion rod 4 is screwed onto the screw portion 2a of the connecting rod 2 and is assembled to the main rod 1.

The expansion enforcing member 4 is constructed by projecting a threaded rod portion 4b at the tip of a main body portion 4a having a tapered truncated cone shape on the front end side, and a screw hole 4c formed at the rear end of the main body portion 4a. The side connecting rod 2 is screwed to the screw portion 2a and assembled to the main rod 1 as described above, and the base of the elastic rod 7 is brought into contact with the tapered outer peripheral edge of the main body 4a having a tapered truncated cone shape. In this way, the elastic rods 7, 7, 7 can be arranged so as to gradually separate from the base portion in the distal direction in accordance with the inclination angle of the outer peripheral edge.

The elastic rod 7 is a threaded rod portion 4b of the expansion forcing member 4.
At the base of the support portion 5b of the support piece 5 engaged so as to penetrate the screw rod portion 4b, the base portion is rotatably fixed to the free end portion of the front end. Is a length that reaches the position of the rear connecting rod 3.

The support piece 5 has a pair of flange pieces projecting from one end in the axial direction of a cylindrical main body 5a, and supports notches formed at equal intervals in the circumferential direction of the flange pieces. The connecting portion piece 7a provided at the base end of the elastic rod 7 is engaged with the supporting portion 5b, and the wire rod 8 engaged between the flange portion pieces through the connecting portion piece 7a is the main body portion. The elastic rod 7 is rotatably supported as described above by being wound around 5a.

The elastic rod 7 is constructed by inserting the main rod into a tip member (not elastically deformable) provided with the connecting piece 7a, which is convenient for assembling with the support piece 5. Because
There is no inconvenience even if it is composed of only the main rod and assembled to the support piece 5.

A support piece 5 is constructed by disposing a support portion 5b in which the base portion of the elastic rod 7 is rotatably mounted in the axial direction so as to be offset to one end of the main body portion 5a in the axial direction. Is
By selectively changing the direction of the main body portion 5a and assembling the main body portion 5a to the threaded rod portion 4b of the expansion forcing member 4, it is possible to change the separation distance of the support portion 5b from the main body portion 4a of the forcing member 4.
By arranging one end of the supporting portion 5b side to the main body portion 4a side and adjoining it, the inclination angle of the elastic rod 7 with respect to the axis becomes large, and when arranging the other one end side to the main body portion 4a side, the inclination angle is increased. Becomes smaller, and can correspond to the inner diameter of the cable support S on the spiral.

The support piece 5 rotatably supporting the elastic rod 7 on the support portion 5b is screwed with the leading member 9 to the threaded rod portion 4b of the expansion forcing member 4 which penetrates the main body portion 5a of the support piece 5. By tightening, the leading member 9 and the expansion forcing member 4 are clamped and fixed.

In the embodiment, the support piece 5 is clamped and fixed between the leading member 9 and the expansion force-carrying member 4 and is fixed so to speak (apart from the fact that it can be separated), but it is rotated about the screw rod portion 4b. Even if it does, it does not necessarily cause inconvenience.

The leading member 9 is formed by providing a screw hole 9b at the rear end of the main body 9a having a tapered conical shape on the front side, and the expanding force member in which the support piece 5 is passed through the screw hole 9b. 4 by screwing together the threaded rod portion 4b of the support member 4 and the expansion forcing member 4
It is assembled on the main rod 1 by arranging the same on the same axis by sequentially, and by making it taper, when the inside of the spiral cable support S is advanced, it is difficult to get caught in the support S. is there.

The rear connecting rod 3 is a solid rod rod made of metal having a fitting portion 3b on the front end side of the main rod portion 3a and a fine rod portion 3c having a screw portion 3c 'on the rear end side. And the fitting part 3b
Is attached to the cylindrical body 1A, and the rear connecting rod 3
On the other hand, the focusing ring 10 is rotatably assembled to the thin rod portion 3c so that the thin rod portion 3c penetrates the focusing ring 10, while the restriction ring 11 is attached to the screw portion 3c 'of the thin rod portion 3c.
The thin rod portion 12b of the weight rod 12 engaged with is screwed in the screw hole 13 to connect the weight rod 12.

The weight rod 12 is composed of a solid rod rod made of metal, in which the fine rod portion 12b is connected to the tip of the main rod portion 12a, and the rear connecting rod 3 is formed of a solid rod rod. While moving inside the spiral cable support S so that the center of gravity of the leading tool A exists on the rear side in cooperation with each other,
The leading end on the side of the leading member 9 is prevented from being directed downward (especially in the case of upward inclination), and the detachment from the support S is prevented (see the leading tool A in FIG. 6).

A connection jack 14 for connecting a lead wire (FRP or steel wire) is screwed into a screw hole 13 'provided at the rear end of the main rod portion 12a of the weight rod 12, and the connection jack 14 is used. The leading tool A moves along the suspension line m inside the spiral cable supporting tool S installed between the electric poles d by the pushing operation of the lead wire w which is the pushing tool and is connected by the above.

The focusing ring 10 has an insertion hole 10b which loosely engages the tip end side of the elastic rod 7 around the through hole 10a of the thin rod portion 3c of the rear connecting rod 3 and is inserted through the focusing ring 10. The holes 10b are provided so as to correspond to the number of elastic rods 7 and the positions in the circumferential direction (three elastic rods are arranged at equal intervals in the circumferential direction, but five elastic rods are provided in the embodiment). But ok,
The point is that it is an appropriate number).

Further, the focusing ring 10 has the thin rod portion 3c.
The insertion hole 10b can be aligned with the elastic rod 7 by rotating it about its center, and the free end of the elastic rod 7 can be engaged. The elastic rod 7 can be twisted for some reason. Even in this case, the twisting is prevented in advance by the rotation operation about the narrow rod portion 3c.

Incidentally, the embodiment can be used as a leading tool even in a state where (the tip of) the elastic rod 7 is not attached to the focusing ring 10 (without being inserted into the insertion hole 10b).

In the restriction ring 11, the elastic rod 7 is brought into pressure contact with the cable support S to insert the through hole 10 of the focusing ring 10.
This is because the tip of the elastic rod 7 comes into contact with the restriction ring 11 when moving along b, and the movement is restricted to maintain the arc shape due to the elastic deformation of the elastic rod 7 within a certain range. .

Then, the electric poles d, d are hung on the suspension line m.
Inside the spiral cable support S installed between
When the lead wire w is connected to the connection jack 14 provided at the rear end of the leading tool A and the lead wire w is pushed (sent) out, the leading tool A moves along the suspending wire m. The lead wire w is moved from one electric pole d side to the other one electric pole d side inside, and the lead wire w is passed between the electric poles d and d.

When the lead tool A is removed from the lead wire w, a pulling rope is connected to the tip of the lead wire w, and the lead wire w is pulled back to the original position, the pulling rope will be passed between the utility poles. When the cable is pulled, the tip of the cable connected to the end of the rope moves from the other one pole side to the one pole side, and the cable is suspended between the poles.

If a pulling rope is connected to the end of the lead wire w and the lead wire w is placed between the utility poles and the lead wire is pulled from the other one of the utility pole sides, the pull rope is placed between the utility poles. In this state, the tow rope is towed, and the cable connected to the end of the rope is erected on the electric poles d and d.
Can be supported by.

The leading tool A is used as a so-called preliminary work during the cable erection work as described above, as described above.

[0028]

Since the present invention has the above-mentioned constitution,
Each elastic rod can be moved separately from each other along the axis of the focusing ring, thus facilitating the deformation of the elastic rod due to being caught on a cable support or the like, and smoothly moving within the support. You can

Further, since the originally linear elastic rod is forcibly elastically deformed to form an arc shape for smooth movement within the support, the elastic rod is always linear. Since it is trying to return to its shape, even if it comes into contact with the support during the movement operation, it is easily deformed (in combination with the combination with the focusing ring) and is caught by the support to hinder the movement. There is no. Further, since the elastic rod is attached to the supporting portion arranged at a position deviated to one end side of the main body portion of the supporting piece, the direction of the main body portion is changed and the elastic rod is attached to the expansion forcing member so that the arc of the elastic rod is formed. The size can be changed to match the inner diameter of the spiral cable support (applicable to two types of spiral cable supports having different diameters).

[Brief description of drawings]

FIG. 1 is a front view.

FIG. 2 is a partially cutaway front view of the front side.

FIG. 3 is an enlarged view of a part of FIG.

FIG. 4 is a partially cutaway front view on the rear side.

FIG. 5 is a front view showing the relationship between the support piece and the elastic rod.

FIG. 6 is a schematic explanatory view showing a usage state.

[Explanation of symbols]

1 Main rod 4 Expansion forcing member 5 support piece 5b Support Department 7 Elastic rod 9 Lead material 10 Focusing ring

Front page continuation (72) Inventor Hironobu Tanada 2-3-1, Otemachi, Chiyoda-ku, Tokyo Within Nippon Telegraph and Telephone Corporation (72) Inventor Ryoichi Kaneko 2-3-1, Otemachi, Chiyoda-ku, Tokyo Japan Telegraph and Telephone Corporation (56) Reference JP 2000-270431 (JP, A) JP 2000-253526 (JP, A) Patent 3002872 (JP, B2) (58) Fields investigated (Int.Cl. ⁷ , DB name) H02G 1/02 H02G 7/06

Claims (2)

(57) [Claims] 1. A spreading forcing member is provided at a tip of a main rod, and a cylindrical main portion of a support piece is attached to a screw rod portion of the spreading forcing member.
One end in the direction along the axis is selectively arranged on the side of the expansion forcing member or on the side of the tapered leading member that is screwed to the tip of the threaded rod portion, and further, the threaded rod portion is made to penetrate therethrough. At the same time, the base portion of an appropriate number of elastic rods, which come into contact with the circumferential surface of the expansion forcing member and separate from each other, is attached to the support portion provided at one end of the main body portion in a direction along the axis. A focusing ring, which is movably fixed and whose tip ends of the elastic rods are loosely engaged independently of each other, is rotatably engaged coaxially with the rear end side of the main body rod to which the pushing tool is connected. A leading tool for inserting a cable tow rope of a spiral cable support. 2. The leading tool for inserting a cable pulling rope of a spiral cable support according to claim 1, wherein a weight member is provided on the rear end side of the main rod so that the center of gravity exists on the rear side.