JPH0428171Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) When extending steel-core aluminum stranded wires at once between multiple steel towers, measures are taken to prevent the wires from twisting even at intermediate positions between the towers. Although necessary, the present invention relates to a device for that purpose.

(Prior Art) Conventionally, a method has been used in which a wire is extended between adjacent steel towers, the wire is held back, and then the wire is moved to the next space between the towers. In other words, long-distance line extensions spanning multiple towers were based on repeated single-span line extensions. However, the length of an electric wire wound around a drum often allows the wire to be extended over multiple spans. in this case,
Extending multiple spans at once is effective in reducing the cost of line extension work. However, as the wire length increases, twisting of the wires, that is, untwisting occurs even in the middle. However, since multi-span wire extension is a new construction method, no measures have been developed to prevent twisting in the middle of the wire extension.

(Problems to be solved by the invention) A device called a running board is known as a device for preventing twisting of electric wires in the construction of a single span between adjacent steel towers (for example,
44951). This involves attaching a wire clamp to the head of the wire in the running direction, connecting this to the tail of the traction wire with multiple connectors, and suspending a weight consisting of multiple units from the connector on the traction wire side. It is something.

However, this device can only be installed at the head of the wire. In order to make it possible to attach and detach it to the middle part of the electric wire, there is no choice but to cut each member into two. It is also necessary that the wires can smoothly pass through metal wheels attached to steel towers in the middle of the wire extension, and that there is no risk of damaging the wires at that time.

(Means for Solving the Problems) In order to solve the above-mentioned conventional problems, the present invention includes a tapered part 1a and a flange part 1b, has a central through hole 1c, and has a cut 1d extending over the entire length.
and a rubber guide tube 1 whose outer periphery can be tied together, and which can be joined and separated from each other, and in the joined state, the electric wire W
It consists of a pair of opposing halves 3 and 4 that form a curved cylindrical body by holding the same, and a fitting groove is provided inside one end of each half 3 and 4 to fit and lock the flange 1b of the guide tube 1. 3b,
4b, and a curved metal fitting 2 having pivot parts such as pivot pins 3c and 4c at the other end, and a pair of opposing bending fittings 2 which form a cylindrical body that can be joined and separated from each other and that grips the electric wire W in the joined state. It consists of half parts 6 and 7, and one end side of each half part 6 and 7 is provided with corresponding pivot parts such as brackets 6b and 7b, which can be pivoted to the pivot part of the curved metal fitting 2, and the other end is provided with a corresponding pivot part on the inside side. has a fitting groove 6
d and 7d, respectively, and a flange portion 8a and a cylindrical portion 8b that fit and lock into the fitting groove 7d of the gripping metal 5, a center through hole 8c is bored, and a cut is made over the entire length. 8d, the outer periphery of which can be tied together, and a plurality of U-shaped cross section units 9a are connected one after another in a chain at both ends, and the one end side unit 9a of the gripping metal fitting 5 is connected. A twist prevention device for electric wire extending was constructed by including the weight 9.

(Function) The twist prevention device of the present invention first pushes open the cut 1d of the guide tube 1, attaches it to the electric wire W, and binds it with a suitable member such as wire. A curved metal fitting 2 is placed over it, and the electric wire W is curved along the curved metal fitting to hold the electric wire W together. At this time, the annular fitting grooves 3b and 4b at one end of the curved fitting 2 are engaged with the collar 1b of the guide tube 1. Next, while pushing open the cut 8d, the protective tube 8 is attached to the electric wire at a predetermined distance from the curved metal fitting 2, and the wires are tied together with a suitable member such as a wire. Then, the pivot pins 3c and 4c, which are the pivot joints on the other end side of the curved metal fitting 2, are connected to the bracket 6, which is the corresponding pivot joint.
b, 7b and the protection tube 8.
While fitting the fitting grooves 6d, 7d into the flange 8a, the halves 6, 7 are butted together and held together with the electric wire W. Next, the end unit 9a of the weight 9 is locked to the gripping metal fitting 5.

In this way, the present device is mounted on the electric wire W, and the electric wire W is extended in the direction of the guide tube 1. When passing the golden car,
Since the curved metal fitting 2 is stabilized by tilting along the inclination of the metal wheel, the weight 9 always passes through the metal wheel while tilting along the inclination of the metal wheel, and therefore the weight 9 is attached to the edge of the inclined metal wheel. Pass the gold wheel smoothly without getting caught. Further, the U-shaped cross-section units 9a of the weights 9 rise one after another to hold the protective tube 8,
It does not impede passage.

(Embodiment) An embodiment of the present invention will be described with reference to FIGS. 1 to 10. The twist prevention device of this embodiment includes a guide tube 1, a curved metal fitting 2, a gripping metal fitting 5, and a protection tube 8.
and weight 9.

The guide cylinder 1 is made of rubber and has a tapered part 1a and a flange part 1.
A through hole 1c capable of holding an electric wire W is bored in the center thereof, and a cut 1d extending over the entire length is provided. An annular groove 1e is provided on the outer periphery of the tapered portion 1a so that a wire (not shown) can be hung thereto for binding.

A curved metal fitting 2 consisting of a pair of curved semi-cylindrical half parts 3 and 4 forms a curved cylinder when the two half parts 3 and 4 are combined facing each other, and a wire W is curved and held in the center. It is possible to hold Bolt holes 3a and 4a for tightening the two halves 3 and 4 with bolts are bored in the middle of the extension of the curved metal fitting 2. Each half 3,
On the inner periphery of one end of 4, there are semi-annular fitting grooves 3b and 4b into which the flange 1b of the guide tube can be fitted and locked, and on the outside of the other end there are pivot pins 3c, which project horizontally, respectively. 4
c is provided.

The gripping fitting 5 also consists of semi-cylindrical halves 6 and 7.
Each half part 6, 7 forms a cylinder when assembled facing each other, and can hold an electric wire W at the center.
Bolt holes 6a and 7a for tightening the two halves 6 and 7 with bolts are bored in the middle of the extension of the gripping metal fitting 5. A curved metal fitting 2 is attached to one end side of the gripping metal fitting 5.
A bracket 6 that can be pivotally supported on the pivot pins 3c and 4c of
b, 7b are provided, and on the inner periphery of the center,
Spiral grooves 6c and 7 corresponding to the twisting of the surface stranded wires of the electric wires
c is formed. If the surface of the wire is relatively soft, rubber may be attached to the inner periphery of each half 6, 7. Semi-annular fitting grooves 6d and 7d are formed on the inner periphery of the other end of each of the half parts 6 and 7, respectively, into which a flange 8a of a protection cylinder 8, which will be described later, can be fitted and locked. Further, on the outside of the other end of each half portion 6, 7, there are formed vertically flattened retaining portions 6e, 7e, and on these retaining portions 6e, 7e, a retaining pin for a weight 9, which will be described later, is provided. Holes 6f and 7f are formed.

The protective tube 8 is made of rubber and includes a flange portion 8a and a cylindrical portion 8.
A through hole 8c capable of holding an electric wire W is bored in the center, and a cut 8d extending over the entire length is provided. Further, an annular groove 8e is provided on the outer periphery of the cylindrical portion 8b so that a wire (not shown) can be hung thereto for binding.

The weight 9 includes a plurality of units 9a each having a U-shaped cross section.
are connected in a chain using links 9b, respectively, and the end unit 9a can be connected to the grip fitting 5 by means of pins 10 inserted into pin holes 6f, 7f of the retaining parts 6e, 7e.

Next, the operation of this embodiment will be explained. When using this anti-twisting device, first, the guide tube 1 is pushed open through the cut 1d and attached to the electric wire W, and the annular groove 1e is tied with a wire. The curved metal fitting 2 is placed on top of the bent metal fitting 2, and the electric wire W is held together with the two halves 3 and 4 and fixed with bolts. At this time, the annular fitting grooves 3b and 4b at one end of the curved metal fitting 2 are respectively engaged with the collar 1b of the guide tube 1. The electric wire W is inserted in a curved manner along the curved metal fitting 2. Next, the protection tube 8 is attached to the electric wire W at a predetermined distance from the curved metal fitting 2 while pushing open the cut 8d, and the annular groove 8e is tied with a wire. Pivot pins 3c and 4c, which are pivot joints on the other end side of the curved metal fitting 2,
are inserted into the pin holes of the brackets 6b, 7b, which are the corresponding pivot parts, and while fitting the fitting grooves 6d, 7d into the flange 8a of the protective tube 8, insert the halves 6, 7.
are butted together and held together with the electric wire W. Next, adjust the orientation of the gripping metal fitting 2 so that the pin holes 6f and 7f for connecting the weight 9 are positioned horizontally above the electric wire W, and finally attach the end unit 9a of the weight 9 to the gripping metal fitting 5 with the pin 10. Retaining parts 6e, 7ee
to be locked.

FIG. 1 shows the device mounted on the wire in this manner. Then, in this state, the electric wire W is extended in the direction of the guide tube 1. On the way to the line, this device must pass through a metal wheel suspended from a steel tower. For example, in a steel tower located at a bending point where the electric wire W is bent and extended laterally, the metal wheel may be drawn by the electric wire W and tilted with respect to the vertical. With a conventional device that only has a hanging weight, the weight always tries to move vertically downward due to the weight, so it enters the tilted metal wheel and the weight touches the edge of the metal wheel. This will cause the object to get caught and prevent it from passing. However, in this device, when passing the metal wheel, the curved metal fitting 2 tilts along the inclination of the metal wheel and becomes stable, so the weight 9 always passes through the metal wheel while tilting along the inclination of the metal wheel. Therefore, the weight 9 smoothly passes through the metal wheel without getting caught on the edge of the inclined metal wheel. Further, the U-shaped units 9a of the weights 9 rise one after another to hold the protective tube 2, so that they do not obstruct the passage of the metal wheel. In the case of multi-span line extension, the installation interval of this device is appropriately selected on the wire sending side above ground so that this device is located near the tower after the wire is extended. This is for ease of removal after the line extension work is completed.

(Effect of the invention) As described above, in the present invention, the taper portion 1
a and a flange 1b, a center through hole 1c, and a cut 1d extending over the entire length, and a rubber guide tube 1 whose outer periphery can be bundled; It consists of a pair of opposing halves 3 and 4 that form a curved cylindrical body by holding the
Inside one end of each half 3, 4 is a flange 1b of the guide tube 1.
The curved metal fitting 2 is provided with fitting grooves 3b and 4b for fitting and locking, and pivot parts such as pivot pins 3c and 4c at the other end, respectively, and can be joined and separated from each other.
It consists of a pair of opposing halves 6 and 7 that form a cylindrical body that grips the electric wire W in a joined state, and one end side of each half 6 and 7 includes a bracket 6b that can be pivoted to the pivot joint of the bending fitting 2. , 7b, and a fitting groove 6d, 7d on the inside of the other end, and a flange 8a that fits and locks into the fitting groove 7d of the gripping fitting 5. and a cylindrical portion 8b, with a central through hole 8c and a cut 8d extending over the entire length.
A rubber protection tube 8 that has an outer circumference that can be bundled, and a U
A twist prevention device for electric wire stretching is constructed by connecting a plurality of mold cross-section units 9a one after another in a chain shape at both ends, and comprising a weight 9 to which one end side unit 9a is connected to the gripping fitting 5. Because of this configuration, when extending multiple spans at once, the wire W can be attached and detached at any intermediate position, and the wire is gripped by the gripping bracket 2 via the rubber protection tube 8, so the gripping bracket 2 Therefore, the weights 9 can effectively prevent the wires W from twisting in each span, and the reversing action of the bending fitting 2 allows the weights 9 to effectively prevent the wires W from twisting. The weight 9 is tilted along the inclination of the metal wheel when the car passes, and the weight 9 can be passed smoothly without being caught on the metal wheel.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and Fig. 1 is a front view of the device installed on the electric wire, and Fig. 2 is a front view of the device installed on the electric wire.
The figure is a front view of the guide tube, Figure 3 is a side view of the same, Figure 4 is a front view of half of the curved fitting, Figure 5 is a side view of the same,
FIG. 6 is a front view of one half of the gripping metal fitting, FIG. 7 is a front view of the gripping metal fitting, and FIG. 8 is a side view of the gripping metal fitting.
FIG. 9 is a front view of the protection tube, and FIG. 10 is a side view of the same. 1... Guide tube, 1a... Tapered part, 1b... Flange part, 1c... Through hole, 1d... Cut, 2... Curved metal fitting, 3, 4... Half part, 3b, 4b... Fitting groove,
3c, 4c... Pivot pin (pivot part), 5... Grip fitting, 6, 7... Half part, 6b, 7b... Bracket (pivot part), 6d, 7d... Fitting groove, 8... ...Protective tube, 8a...Brim part, 8b...Cylindrical part, 8c...Through hole, 8d...Slit, 9...Weight, 9a...
Weight unit, W...Electric wire.

Claims (1)

[Scope of Claim for Utility Model Registration] A rubber guide tube comprising a tapered part and a flange part, having a center through hole and a cut extending over the entire length, and whose outer periphery can be tied together, and which can be joined and separated from each other, It consists of a pair of opposing halves that form a curved cylindrical body holding the electric wire in a joined state, and a fitting groove for fitting and locking the flange of the guide tube is provided inside one end of each half, and The other end consists of a curved metal fitting each having a pivot portion, and a pair of opposing halves forming a cylindrical body that can be joined and separated from each other and grips the electric wire in the joined state, and one end of each half is each has a corresponding pivot part that can be pivoted to the pivot part of the curved metal fitting, and a gripping metal fitting having a fitting groove on the inside of the other end, and a gripping metal fitting that is fitted and locked in the fitting groove of the gripping metal fitting. A rubber protection tube comprising a flange portion and a cylindrical portion, a center through hole and a cut extending over the entire length, and a rubber protection tube whose outer periphery can be bundled, and a plurality of U-shaped cross section units connected one after another in a chain at each end. and a weight having one end unit connected to the gripping fitting.