JP6565582B2 - Support method in the middle of service lines - Google Patents

Description

  The present invention relates to a midway support method for a lead-in wire. In particular, the present invention relates to a midway support method for a lead-in wire in which a lead-in wire is suspended on a messenger wire stretched between a pair of utility poles, and the lead-in wire is drawn into a house or the like from the middle of the messenger wire.

  For example, a lead-in wire that is stepped down from a high-voltage distribution line installed between a pair of utility poles may be drawn into a house or the like. In many cases, this lead-in wire is drawn from the utility pole to the entrance of the house.

  On the other hand, in an urban area or the like, the distance between the utility pole and the house is long, and it may be difficult to directly draw the service line from the utility pole to the service entrance of the house. In this case, a method for supporting a halfway of a lead-in wire in which a messenger wire is stretched between a pair of utility poles and the lead-in wire is suspended on the messenger wire is known (for example, see Patent Document 1).

JP 2009-44939 A

  4A and 4B are diagrams illustrating a columnar state of a conventional support method for a lead-in wire according to the prior art, FIG. 4A is a plan view illustrating the columnar state, and FIG. 4B is a front view illustrating the columnar state. FIG.

  5A and 5B are diagrams showing a configuration of an insulating hanger used in the conventional support method for a lead-in wire according to the prior art, FIG. 5A is a front view of the insulating hanger, and FIG. 5B is a right side of the insulating hanger. FIG.

  FIG. 6 is a perspective view showing a configuration of a bindless insulator used in the lead wire intermediate support method according to the prior art. 4 to 6 of the present application correspond to FIGS. 9 to 11 of Patent Document 1. FIG.

  Referring to FIG. 4, a messenger wire Wm is stretched between a pair of utility poles P and P through a ball cage Ai. The end of the messenger wire Wm is moored to a support band B fixed to the utility pole P. A plurality of insulating hangers 8 are attached to the messenger wire Wm at substantially equal intervals between the pair of balls Ai and Ai. These insulating hangers 8 are arranged up to the service entrances of the houses H1, H2, H3, and H4 (see FIG. 4A).

  Referring to FIG. 5, the insulating hanger 8 includes a cable holding portion 81c and a pair of hook-shaped hook portions 81a and 81b. The cable holding portion 81c is formed by bending the linear member 81 spirally for approximately one turn. The pair of hook portions 81 a and 81 b are formed at both ends of the linear member 81. The insulating hanger 8 covers the cable holding portion 81c with a covering material 81i having an insulating property.

  With reference to FIG. 4B or FIG. 5, the lead-in wire We can be introduced into the cable holding portion 81c from the outer peripheral direction. The pair of hook portions 81a and 81b can lock the messenger wire Wm. In this way, by suspending the plurality of insulating hangers 8 on the messenger wire Wm, the lead-in wire We can be installed along the messenger wire Wm.

  Referring to FIG. 4B, the high-voltage distribution line W branches off the underline Wf via the connecting material Tc. The underline Wf extends downward along the utility pole. The underline Wf is connected to a transformer (not shown). The lead-in wire We stepped down by the transformer is suspended from the messenger wire Wm through one bindless insulator 9.

  Referring to FIG. 6, the bindless insulator 9 includes a rectangular parallelepiped main body 91 and a pair of winding protrusions 92 and 92. The main body 91 is made of porcelain or synthetic resin. The pair of winding protrusions 92 and 92 protrude in opposite directions from the both side surfaces of the main body 91. The lead wire We can be wound around one set of winding protrusions 92 and 92.

  Referring to FIG. 6, the main body 91 has a long hole 91h opened on one end side thereof. One end of the pull-in hook 9f is moored in the long hole 91h. On the other hand, referring to FIG. 4 (B), a brace A is fixed to the utility pole P. At both ends of the arm metal A, a cap-shaped lead wire retaining metal Br is fixed.

  Referring to FIG. 6, the other end of the pull-in hook 9f is moored to the lead-in wire retaining bracket Br. Thereby, one bindless insulator 9 can be retained by the arm metal A (see FIG. 4B).

  Referring to FIG. 4 (B), a lead wire intermediate support (hereinafter abbreviated as intermediate support) Bc is disposed on the end side of the plurality of insulating hangers 8. The midway support tool Bc is composed of a belt-like support plate and a plate nut. And the messenger wire Wm is arrange | positioned between a support plate and a plate nut, and the support tool Bc is clamping the messenger wire Wm by fastening a volt | bolt to a plate nut.

  Referring to FIG. 4B, the intermediate support tool Bc has a bindless insulator 9 connected to its end. Then, the lead-in wire We suspended by the plurality of insulating hangers 8 is supported by the bindless insulator 9, and then, for example, is drawn toward the inlet of the house H1 (see FIG. 4A).

  Referring to FIG. 4A, the messenger wire Wm is in a state of being attracted in opposite directions on both sides of the messenger wire Wm by the lead-in wire We. The tension of the lead-in wire We of one house H1 and H2 is in a state of being added to the tension of the lead-in wire We of the other house H3 and H4. If the tension of the lead-in wire We of one house H1 and H2 exceeds the tension of the lead-in wire We of the other house H3 and H4, there is a concern that the lead-in port of the other house H3 and H4 may be damaged.

  Without being limited to the example shown in FIG. 4 (A), if the number of houses of the houses located on both sides of the messenger wire Wm is not balanced, the entrance of one or the other house is damaged. I am worried.

  Referring to FIG. 4, the slackness of the lead-in line We from the midway branch of the messenger wire Wm to the lead-in port of the house is set to about 10% so as not to damage the inlet of the house. For this reason, the ground clearance of the lead-in line We is lowered. However, when the service line We is directly drawn from the utility pole P to the service entrance of the house, the sag of the service line We is about 2.5% to 3%, and it is preferable to change the sag of the service line We. No. For example, when the distance of the lead-in line We from the halfway branch of the messenger wire Wm to the entrance of the house is 5 m, a slack of 50 cm is required at a slackness of 10%.

Referring to FIG. 4, when the number of facility lines of service line We branched halfway from one messenger wire Wm increases, the wire diameter of messenger wire Wm needs to be increased in order to resist the total tension of service line We. . For example, it is necessary to replace the messenger wire Wm with a cross-sectional area of 22 mm ² to 55 mm ² .

  Referring to FIG. 4, on the other hand, if the wire diameter of messenger wire Wm is increased, the tensile force on utility pole P increases, so that work to support utility pole P with a branch line is required so that utility pole P does not tilt. .

  In the midway support method for a lead-in wire that pulls the lead-in wire from the middle of the messenger wire, even if the number of service lines increases, there is a need for a midway support method for the lead-in wire that does not require a change in the slackness of the lead-in wire. The above can be said to be the subject of the present invention.

  The present invention has been made in view of such problems, and in the midway support method for drawing a lead-in wire from the middle of the messenger wire, even if the number of service lines increases, the slackness of the lead-in wire The purpose is to provide a support method in the middle of the lead-in wire that does not require any changes.

  The present inventor stretches two messenger wires between a set of utility poles, branches a lead-in wire from one messenger wire to a house opposite to the other messenger wire, and one messenger wire from the other messenger wire. By branching the lead-in line to the house on the opposite side of the messenger wire, even if the number of service lines increases, the slackness of the lead-in line does not need to be changed. It came to invent the support tool for the support method in the middle of a lead-in wire, and the support method in the middle of a lead-in wire.

  (1) The lead wire intermediate support method according to the present invention is such that two messenger wires are stretched in a substantially parallel state between a pair of utility poles, and one of the utility poles or / And the one or more service lines extending from the other power pole and suspended from the middle of the one messenger wire toward one or more houses disposed on the opposite side of the other messenger wire. The other messenger wire is suspended with one of the power poles and / or one or more lead wires extending from the other power pole, and the other messenger wire is suspended from one of the messenger wires. The lead-in line is branched toward one or more houses arranged on the side opposite to the wire.

  (2) It is preferable to install the two messenger wires at substantially the same height from the ground.

  (3) The support for the midway support method for the lead-in wire according to the present invention comprises a band member for fastening the outer periphery of the utility pole so as to be freely surroundable, and a single clevis-shaped first support portion swingably connected to the band member. A vertex having a link member having one end and a single clevis-shaped second support portion at the other end, and a double clevis-type third support portion movably connected to the second support portion of the link member A triangular clevis-shaped yoke member having a screw mounting hole at both ends of the base and a male threaded portion that can be fastened to the screw mounting hole at the shaft, and a single clevis-shaped fourth support A U-shape that has an eyebolt at the head and a double clevis-shaped fifth support portion that is swingably connected to the fourth support portion of the eyebolt at one end, and on which a messenger wire can be wound. With a thimble formed on the outer circumference of the groove on the other end It includes a wood, a.

  (4) It is preferable that a pair of said yoke members are opposingly arranged between a set of utility poles.

  In the middle support method of the lead-in wire according to the present invention, two messenger wires are stretched between a pair of utility poles, the lead-in wire is branched from one messenger wire to a house opposite to the other messenger wire, and the other Since the lead-in line is branched from the messenger wire to the house opposite to the one messenger wire, the tension of the lead-in line to the house borne by one messenger wire can reduce the influence on the other messenger wire. This eliminates the need to change the slack of the lead-in line.

It is a top view which shows the column state of the support method in the middle of the lead-in wire by one Embodiment of this invention. It is the top view to which the principal part of FIG. 1 was expanded. It is a perspective exploded view showing the composition of the support for the midway support method of the lead-in wire by the embodiment. It is a figure which shows the column state of the support method in the middle of the lead-in line by a prior art, FIG. 4 (A) is a top view which shows a column state, and FIG. 4 (B) is a front view which shows a column state. It is a figure which shows the structure of the insulation hanger used by the midway support method of the lead-in wire by a prior art, FIG. 5 (A) is a front view of an insulation hanger, FIG.5 (B) is a right view of an insulation hanger. . It is a perspective view which shows the structure of the bindless insulator used by the midway support method of the lead-in wire by a prior art.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
[Configuration of support tool for support method in the middle of lead-in wire]
Initially, the structure of the support tool for the middle support method of the lead-in wire by one Embodiment of this invention is demonstrated.

  FIG. 1 is a plan view showing a columnar state of a midway support method for a lead-in wire according to an embodiment of the present invention. FIG. 2 is an enlarged plan view of the main part of FIG. FIG. 3 is an exploded perspective view showing the structure of the support for the midway support method for the lead-in wire according to the embodiment.

  Note that the components having the same reference numerals as those used in the prior art have the same action, and thus the description thereof may be omitted.

  Referring to FIGS. 1 to 3, a support tool (hereinafter abbreviated as a support tool) 10 for a midway support method for a lead-in wire according to an embodiment of the present invention includes a band-shaped band member 1 and a link member 2. . The support 10 includes a triangular-shaped yoke member 3, a set of eyebolts 4, 4, and a set of retaining members 5, 5.

  Referring to FIG. 2 or FIG. 3, the band member 1 includes a band main body 11 formed in an arc shape and a pair of band pieces 12 and 12. A part of the outer periphery of the band body 11 is open. The utility pole P can be introduced into the band body 11 by expanding both ends of the band body 11.

  Referring to FIG. 2 or FIG. 3, the band piece 12 has a curved portion 12 a that overlaps the end portion of the band main body 11 on one end side. Moreover, the band piece 12 forms the protrusion part 12b which protruded toward the outer peripheral direction of the utility pole P at the other end part side. The pair of protrusions 12b and 12b can be arranged to face each other with a predetermined interval.

  Referring to FIG. 3, the band body 11 has a plurality of countersinks 11h arranged in the outer circumferential direction. On the other hand, the band piece 12 has a plurality of screw holes 12h opened in the curved portion 12a. With the countersunk hole 11h and screw hole 12h at an appropriate position aligned, the countersunk screw 13 is inserted into the countersink hole 11h from the inside of the band main body 11, and the nut member is fastened, whereby the band main body 11 and the pair of bands The pieces 12 and 12 can be fixed together.

  With reference to FIG. 2 or FIG. 3, the band main body 11 is connected to the utility pole P by fastening the pair of protrusions 12 b and 12 b with the bolt member 14 and the nut member so that the pair of protrusions 12 b and 12 b approach each other. Can be tightened.

  Referring to FIG. 2 or FIG. 3, the link member 2 has a single clevis-shaped first support portion 21 at one end. The link member 2 has a single clevis-shaped second support portion 22 at the other end.

  Referring to FIG. 3, the first support portion 21 opens a substantially circular first through hole 21h. Similarly, the second support portion 22 opens a substantially circular second through hole 22h. The first support portion 21 is disposed between the pair of projecting portions 12b and 12b, and the bolt member 14 is inserted into the first through hole 21h so that the link member 2 is swingably connected to the band member 1. Yes (see FIG. 2).

  Referring to FIG. 2 or FIG. 3, the yoke member 3 has a double clevis-shaped third support portion 31 at the apex portion. Further, the yoke member 3 has screw mounting holes 32 h opened at both end portions of the bottom side portion 32.

  Referring to FIG. 3, the third support portion 31 opens a substantially circular third through hole 31h. The link member 2 and the yoke member 3 can be swingably connected by inserting the cotter 31p in a state where the third through hole 31h and the second through hole 22h of the second support portion 22 coincide (see FIG. 2). .

  Referring to FIG. 2 or FIG. 3, the eyebolt 4 has a male screw portion 41f at the shaft portion. The eyebolt 4 has a single clevis-shaped fourth support portion 42 at the head. The fourth support portion 42 opens a substantially circular fourth through hole 42h (see FIG. 3).

  With reference to FIG. 2 or FIG. 3, the male screw portion 41 f can be inserted into the screw mounting hole 32 h, and a set of nut members can be screwed into the male screw portion 41 f so as to sandwich the bottom side portion 32 of the yoke member 3. The eyebolt 4 can adjust the protrusion amount of the fourth support portion 42 from the bottom portion 32 of the yoke member 3.

  Referring to FIG. 2 or FIG. 3, the retaining member 5 has a double clevis-shaped fifth support portion 51 on one end side. The drawing member 5 has a thimble 52 on the other end side. The fifth support portion 51 opens a substantially circular fifth through hole 51h (see FIG. 3).

  With reference to FIG. 3, the retaining member 5 is swung with respect to the eyebolt 4 by inserting the cotter 51 p in a state where the fifth through hole 51 h and the fourth through hole 42 h of the fourth support portion 42 are aligned. They can be connected freely (see FIG. 2).

  Referring to FIG. 3, the thimble 52 has a U-shaped groove 52d formed on the outer periphery. A messenger wire Wm can be wound around the groove 52d (see FIG. 1). The terminal of the messenger wire Wm is wound around the thimble 52 and the terminal of the looped messenger wire Wm is closed, so that the messenger wire Wm can be moored to the thimble 52 (see FIG. 1).

  Referring to FIG. 1, a pair of yoke members 3, 3 are disposed opposite each other between a pair of utility poles P. Two messenger wires Wm and Wm are stretched in a substantially parallel state between a pair of utility poles P and P by disposing a pair of support members 10 and 10 between the pair of utility poles P and P. Can be set.

[Supporting method in the middle of service lines]
Next, the midway support method of the lead-in wire by one Embodiment of this invention is demonstrated. First, two messenger wires Wm and Wm are stretched in a substantially parallel state between a pair of utility poles P and P through a ball cage Ai using a pair of support tools 10 and 10 (FIG. 1). In this case, it is preferable to install two messenger wires Wm and Wm at substantially the same height from the ground (see FIG. 1). Further, it is preferable that the ball cage Ai is installed at a position of about 2 m from the outer periphery of the utility pole P (see FIG. 1).

  Next, referring to FIG. 1, with a plurality of insulating hangers 8 (see FIG. 5), a lead-in wire We extended from one utility pole P is suspended on one messenger wire Wm. Next, the lead-in wire We is branched from the middle of one messenger wire Wm toward the house H1 arranged on the opposite side to the other messenger wire Wm. In this case, as shown in FIG. 4 (B), the lead-in wire We can be branched using the intermediate support tool Bc and the bindless insulator 9. Next, the lead-in line We is drawn toward the lead-in port of the house H1.

  Further, referring to FIG. 1, a plurality of insulating hangers 8 are used (see FIG. 5), and a lead-in wire We extended from the other utility pole P is suspended from one messenger wire Wm. Next, the lead-in wire We branches from the middle of one messenger wire Wm toward the house H2 arranged on the opposite side to the other messenger wire Wm. In this case, as shown in FIG. 4 (B), the lead-in wire We can be branched using the intermediate support tool Bc and the bindless insulator 9. Next, the lead-in line We is drawn toward the lead-in port of the house H2.

  On the other hand, referring to FIG. 1, a plurality of insulation hangers 8 are used (see FIG. 5), and a lead-in wire We extended from one utility pole P is suspended from the other messenger wire Wm. Next, the lead-in wire We is branched from the middle of the other messenger wire Wm toward the house H3 arranged on the opposite side of the messenger wire Wm. In this case, as shown in FIG. 4 (B), the lead-in wire We can be branched using the intermediate support tool Bc and the bindless insulator 9. Next, the lead-in line We is drawn toward the lead-in port of the house H3.

  Further, referring to FIG. 1, a plurality of insulating hangers 8 are used (see FIG. 5), and a lead-in wire We extended from the other utility pole P is suspended from the other messenger wire Wm. Next, the lead-in wire We is branched from the middle of the other messenger wire Wm toward the house H4 arranged on the opposite side to the one messenger wire Wm. In this case, as shown in FIG. 4 (B), the lead-in wire We can be branched using the intermediate support tool Bc and the bindless insulator 9. Next, the lead-in line We is drawn toward the lead-in port of the house H4.

  Without being limited to the example shown in FIG. 1, a lead-in wire We extended from the other utility pole P is suspended on one messenger wire Wm, and the other messenger wire Wm is opposite to the other messenger wire Wm. The lead-in line We can also be branched toward the house H1 arranged in the area.

  Further, without being limited to the example shown in FIG. 1, a lead-in wire We extended from one utility pole P is suspended on one messenger wire Wm, and the other messenger wire Wm is suspended from the middle of one messenger wire Wm. The lead-in wire We can also be branched toward the house H2 arranged on the opposite side.

  Furthermore, without being limited to the example shown in FIG. 1, a lead-in wire We extended from the other utility pole P is suspended on the other messenger wire Wm, and one messenger wire Wm is suspended from the middle of the other messenger wire Wm. The lead-in wire We can also be branched toward the house H3 arranged on the opposite side.

  Further, without being limited to the example shown in FIG. 1, a lead-in wire We extended from one utility pole P is suspended on the other messenger wire Wm, and one messenger wire Wm is suspended from the middle of the other messenger wire Wm. The lead-in wire We can also be branched toward the house H4 arranged on the opposite side.

[Effect of support method in the middle of lead-in wire]
Next, the effect | action and effect of the midway support method of the lead-in wire by embodiment are demonstrated. Referring to FIGS. 1 to 3, the lead wire intermediate supporting method according to the embodiment stretches two messenger wires Wm · Wm between a pair of utility poles P · P, and from one messenger wire Wm to the other. Since the lead-in wire We is branched to the houses H1 and H2 on the opposite side to the messenger wire Wm, and the lead-in line is branched from the other messenger wire Wm to the house H3 and H4 on the opposite side to the one messenger wire Wm. The tension of the lead-in wire We to the house borne by the wire Wm can reduce the influence on the other messenger wire Wm. This eliminates the worry of damaging the house entrance.

  Referring to FIG. 1, the midway support method for the lead-in wire according to the embodiment does not require a sag from the midway branch of the messenger wire Wm to the house to be about 10%, and the facility is about 2.5% to 3%. It is possible to increase the ground height of the lead-in line We.

Furthermore, referring to FIG. 1, the lead wire intermediate support method according to the embodiment does not need to increase the diameter of the messenger wire Wm even if the number of facilities of the lead wire We increases. For example, it is not necessary to replace the messenger wire Wm with a cross-sectional area of 22 mm ² to 55 mm ² . For this reason, it is not necessary to newly install a branch line.

The midway support method for the lead-in wire according to the present invention has the following effects.
(1) The tension to the service entrance can be reduced.
(2) Since it is only necessary to check the branch direction of the service line, branch construction is easy.
(3) It is not necessary to replace the messenger wire.
(4) No need to install branch lines.

DESCRIPTION OF SYMBOLS 1 Band member 3 Yoke member 5 Drawing member 8 Insulation hanger 10 Support tool (support tool for the support method in the middle of a lead-in wire)
H1-H4 House P Telephone pole We Lead-in line Wm Messenger wire

Claims (4)

Two messenger wires are stretched in a substantially parallel state between a pair of utility poles,
One of the messenger wires is suspended with one or more lead wires extending from one of the utility poles and / or the other of the utility poles, and the other side of the messenger wire is opposite to the other messenger wire. Branching the lead-in wire towards one or more houses located in
The other messenger wire suspends one of the electric poles and / or one or more lead wires extending from the other electric pole, and the other side of the other messenger wire is opposite to the one messenger wire A method for supporting the midway of the lead-in wire, which branches the lead-in wire toward one or more houses arranged in the building.   The midway support method of the lead-in wire according to claim 1, wherein the two messenger wires are installed at substantially the same height from the ground. A support tool for the intermediate support method of the lead wire used in the intermediate support method of the lead wire according to claim 1 or 2,
A band-shaped band member for fastening the outer periphery of the utility pole so as to be freely enclosed;
A link member having a first clevis-shaped first support portion that is swingably coupled to the band member at one end, and a single clevis-shaped second support portion at the other end;
A triangular support yoke member having a double clevis-shaped third support portion that is pivotably connected to the second support portion of the link member at the apex portion, and having screw mounting holes opened at both ends of the bottom portion;
An eyebolt having a male screw portion that can be fastened to the screw mounting hole in the shaft portion and having a single clevis-shaped fourth support portion on the head;
A thimble having a double clevis-shaped fifth support portion, which is pivotably connected to the fourth support portion of the eyebolt, on one end side and having a U-shaped groove around which a messenger wire can be wound. A support member for a support method in the middle of a lead-in wire, comprising a retaining member on the other end side.   The support tool for the midway support method of the lead-in wire of Claim 3 which has arrange | positioned a pair of said yoke member opposingly between one set of utility poles.

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