JP2007214023A - Pin insulator and electric wire supporting method using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pin insulator capable of supporting an electric wire without using a binding wire, and to provide an electric wire supporting method using it. <P>SOLUTION: The pin insulator 10 is provided with a recessed groove 11 for putting in the electric wire 1 from the surface in extended state in horizontal direction, a through hole 12 which is provided continued from the recessed groove and supports the electric wire 1 in horizontal direction in penetrated state when the pin insulator is twisted with the electric wire 1 put in, and an electric wire installation fitting 20 which holds the electric wire 1 in the through hole immovably. When the electric wire 1 is installed in the pin insulator 10, the electric wire installation fitting penetrated with the wire 1 is inserted in the recessed groove 11 and, by twisting the pin insulator 10, the installation fitting 20 is loaded in the through hole 12. Thereby, the electric wire 1 is held immovably. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a pin insulator and a wire support method using the same.

  Generally, a high-voltage distribution line (hereinafter referred to as “electric wire”) stretched around a utility pole is supported by a high-voltage pin insulator (hereinafter referred to as “pin insulator”) attached to a brace of the utility pole.

  As shown in FIG. 13, when the electric wire is stretched, first, a bolt-shaped pin 5 provided at the lower portion of the pin insulator 3 is inserted into the hole 6a of the armrest 6 of the utility pole, and a nut (shown in the figure) is shown. The pin insulator 3 is attached to the brace 6 by rotating it clockwise when viewed from below and fastening it lightly. Next, the wire 1 is placed horizontally along the recess 4 provided at the upper part of the pin insulator 3, and the covered winding bind (hereinafter referred to as “bind”) 2 covered with an insulator is connected to the wire 1 and the recess 4. The electric wire 1 is firmly supported on the pin insulator 3 by being wound around. Finally, the pin insulator 3 is firmly attached to the arm metal 6 by fastening the pin 5 tightly with a nut.

  However, since the bind wire has a strong gripping force, the bind wire penetrates into the insulation of the electric wire. As time passes, the insulation coating becomes thin and the bind wire itself becomes charged. There is a problem that a ground fault occurs due to electricity leaking to the ground through a route. In addition, there is a problem that the binding wire is cut due to secular change and the electric wire cannot be held, and the electric wire falls to the ground and the electricity leaks.

  The objective of this invention is providing the pin insulator which can support an electric wire, without using a bind wire, and the electric wire support method using the same.

  The pin insulator of the present invention is provided continuously with the concave groove for inserting the electric wire in a state of being horizontally extended from the surface thereof, and the pin insulator is twisted with the electric wire inserted therein. A through hole for supporting the electric wire in a state of penetrating in a horizontal direction and holding means for holding the electric wire in an immovable state in the through hole.

  The through hole is preferably provided continuously on the lower left side of the concave groove. If the nut is tightened to the right side when viewed from below when the pin lever is attached to the armrest, the pin lever will be displaced in the right direction when viewed from below (ie, leftward as viewed from above), and the wire will be Since it is strongly pressed by the lowermost surface of a through-hole, an electric wire can be hold | maintained more strongly.

  The holding means is housed in the concave groove and the through hole, has a shape that is firmly held in the through hole, and is formed in a cylindrical shape through which the electric wire passes, and the electric wire penetrating the inside thereof is firmly attached. It is desirable to use an electric wire fixture to be held in the cable.

  It is preferable that the electric wire fixture is formed in a substantially dumbbell shape, and the concave groove and the through hole substantially match the outer shape of the dumbbell-shaped handle portion. Alternatively, the electric wire fixture may be a substantially hourglass shape or a substantially abacus bead shape. In the case of the hourglass shape, the middle portion is thinned, and in the case of the abacus bead shape, the middle portion is thickened. In either case, the outer diameter of the wire fitting changes to a taper shape. By the “effect”, the electric wire fixture exerts an action to hold the electric wire more firmly against the tensile force. In addition, there is also an effect of more reliably preventing the wire fixture from coming off from the pin insulator in the horizontal direction.

  It is desirable that the wire fitting is made of an insulating material having elasticity. Moreover, it is desirable that a plurality of convex portions are provided inside the electric wire fixture. The gripping force of the electric wire fixture with respect to the electric wire is increased, and the electric wire is supported more firmly.

  Furthermore, it is desirable that a cut leading to the inside is provided on a side surface of the wire fixture. Or the said electric wire fixture may be formed by joining a pair of semi-cylindrical members of the shape which divided | segmented the pipe | tube into two. Thereby, an electric wire can be easily fitted inside the electric wire fixture.

  Alternatively, the holding means is a shape portion in which the predetermined portion of the through hole is formed in a shape narrower than the outer shape of the electric wire, and the electric wire is firmly held by the frictional force between the portion and the electric wire. It is desirable. The said site | part may be provided in the lowest part of a through-hole, and may be provided in the front. The electric wire can be supported by the pin insulator without using the electric wire fixture.

  The electric wire support method of the present invention includes a concave groove for inserting the electric wire in a state of being horizontally extended from the surface thereof, and the pin insulator is screwed in a state of being provided continuously with the concave groove. A pin insulator provided with a through hole for supporting the electric wire in a state of penetrating the electric wire in a horizontal direction and a holding means for holding the electric wire in an immovable state in the through hole. The electric wire is held in a non-movable state by being fitted into a groove and twisting the pin insulator.

  According to the present invention, since the electric wire can be supported without using the bind wire, it is possible to prevent the occurrence of electric leakage due to the biting or cutting of the conventional bind wire. Furthermore, the operation | work which winds a bind wire around an electric wire and a pin insulator at the time of electric wire extension work becomes unnecessary.

  First, the pin lever of the first embodiment will be described. The pin insulator is formed with rounded corners (in a so-called R shape) (FIG. 2). FIG. 1 is a perspective view showing the overall configuration of the pin insulator of the first embodiment. The pin insulator 10 includes a detachable electric wire fixture 20. 2A and 2B are diagrams showing a pin insulator, where FIG. 2A is a plan view and FIG. 2B is a front view.

  A concave groove 11 that penetrates the center of the diameter in the horizontal direction is provided on the upper surface of the pin insulator 10, and a through hole 12 is provided continuously below the concave groove. A bolt-shaped pin 5 is provided at the lower portion of the pin insulator 10 to attach it to the armrest 6 of the utility pole.

  The width of the concave groove 11 is equal to the outer diameter of a cylindrical portion of the electric wire fixture 20 described later, and the shape of the bottom surface 11 a substantially matches the outer surface of the cylindrical portion of the electric wire fixture 20.

  The shape of the through-hole 12 is approximately a rightward direction when viewed from above with a column having the same size as the cylindrical portion of the electric wire fixture 20, starting from the bottom surface 11 a of the groove 11 and having the center of the diameter of the pin insulator 10 as the rotation axis. When it is shifted by a few centimeters while rotating 30 °, it almost coincides with the locus drawn by the cylinder.

  FIGS. 3A and 3B are diagrams showing an electric wire fixture as an example of means for holding the electric wire, where FIG. 3A is a plan view and FIG. 3B is a front view. 4A and 4B are diagrams showing the electric wire attachment tool, wherein FIG. 4A is a perspective view showing a closed state, and FIG. 4B is a perspective view showing a state where an opening is opened.

  The electric wire fixture 20 is formed of an insulating material having elasticity such as polyethylene or synthetic rubber. The shape of the electric wire fixture 20 has an inner diameter equal to the outer diameter of the electric wire 1 to be attached to the pin insulator 10, an outer diameter slightly larger than the outer diameter of the electric wire 1, and a length equal to the diameter of the pin insulator 10. The cylinders are provided with stoppers 21a and 21b larger than the outer diameters at both ends, and have a substantially dumbbell shape. And the electric wire fixture 20 is divided | segmented into two by the plane which passes along the center of a diameter.

  The semicircular stoppers 21a and 21b prevent the wire attachment tool 20 from moving in the longitudinal direction and coming off from the pin insulator 10 when the wire attachment device 20 is placed in the concave groove 11 or the through hole 12 of the pin insulator 10. prevent. One end of one stopper 21a is coupled to one end of the other stopper 21b, and serves as a hinge when opening and closing the wire fitting 20. The electric wire fixture 20 is joined by inserting the claw 22 provided at the other end of the one stopper 21a into the receiving hole provided at the other end of the other stopper 21b.

  A plurality of convex portions 24 perpendicular to the longitudinal direction are provided inside the electric wire fixture 20, and the height thereof is about 1 mm. When the electric wire 1 is passed inside the electric wire fixture 20, the convex portion 24 bites into the insulating film of the electric wire 1, so that the electric wire 1 is firmly supported by the electric wire fixture 20 without moving in the longitudinal direction.

  Next, the attachment method of the electric wire to the pin insulator of 1st Embodiment is demonstrated. FIGS. 5A and 5B are views showing a state in which an electric wire is attached to the pin insulator of the first embodiment, wherein FIG. 5A is a perspective view and FIG. 5B is a plan view. 6A and 6B are views showing a state after the electric wire is attached to the pin insulator of the first embodiment, wherein FIG. 6A is a perspective view and FIG. 6B is a plan view.

  The pin insulator 10 is previously attached to the armrest 6 (FIG. 13) by inserting the pin 5 of the pin insulator 10 into the hole 6a of the armrest 6 of the utility pole and lightly fastening it with a nut. Next, the electric wire 1 is placed inside the electric wire attachment 20 with the electric wire attachment 20 opened, the electric wire attachment 20 is closed, and the claw 22 is inserted into the hole 23. Thereby, the electric wire 1 is held by the electric wire fixture 20. Next, the electric wire fixture 20 with the electric wire 1 passing through the inside is dropped horizontally into the concave groove 11 of the pin insulator 10 and placed on the bottom surface 11a of the concave groove 11 (FIG. 5). Next, while holding the electric wire fixture 20, the pin insulator 10 is twisted up in the right direction when viewed from below (that is, twisted down in the left direction when viewed from above). It is loaded into the through hole 12 and brought into contact with the lowermost surface 12a (FIG. 6). Finally, the pin 5 is fastened with a nut. At this time, since the nut is tightened in the right direction when viewed from below, the pin insulator 10 is slightly shifted in the right direction when viewed from below (that is, in the left direction when viewed from above), and the wire fitting 20 penetrates. It is strongly pressed by the lowermost surface 12a of the hole 12. Further, a downward force is applied to the through hole 12 of the pin insulator 10 due to the gravity and tension of the electric wire 1, and the electric wire fixture 20 is strongly pressed by the lowermost surface 12 a of the through hole 12. There will be no departure. As described above, the electric wire 1 is firmly supported by the pin insulator 10 via the electric wire fixture 20.

  In addition, when it is desired to attach an electric wire having an outer diameter different from that of the electric wire 1 to the pin insulator 10, by using an electric wire fixture in which the inner diameter of the electric wire fixture 20 is matched with the outer diameter of the electric wire 1, Then, the electric wire can be attached to the pin insulator 10 to be used.

  Furthermore, the shape of the pin insulator of the first embodiment can be as follows. FIGS. 7A and 7B are diagrams showing a first modification of the pin insulator of the first embodiment, wherein FIG. 7A is a plan view of a wire attachment tool, FIG. 7B is a plan view of the pin insulator, and FIG. It is a top view which shows the state after attaching. FIGS. 8A and 8B are views showing a second modification of the pin insulator of the first embodiment, wherein FIG. 8A is a plan view of the wire attachment tool, FIG. 8B is a plan view of the pin insulator, and FIG. It is a top view which shows the state after attaching.

  The shape of the electric wire fixture 20A of the first modified example is a substantially drum shape whose diameter increases from the center toward both ends. The shape of the concave groove 11A and the through hole 12A of the pin insulator 10A substantially matches the outer shape of the electric wire fixture 20A. Moreover, the shape of the electric wire fixture 20B of the second modified example is a substantially abacus bead shape whose diameter decreases from the center toward both ends. The shape of the concave groove 11B and the through hole 12B of the pin insulator 10B substantially matches the outer shape of the electric wire fixture 20B.

  The wire fitting 20A or 20B has a tapered shape with a diameter increasing or decreasing from the center toward both ends, thereby forming the concave groove 11A and the through hole 12A or the concave groove 11B and the through hole 12B of the pin insulator 10A or 10B. When placed, the wire fitting 20A or 20B can be more reliably prevented from moving from the pin insulator 10 by moving in the longitudinal direction. In addition, as shown in FIG. 7 (C) or FIG. 8 (C), when the electric wire 1 penetrating the electric wire fixture is pulled in one direction, the taper portion is surrounded in the through hole 12A or 12B of the pin insulator. By the “wedge effect” that bites in, the electric wire fixture 20A or 20B exerts the action of holding the electric wire 1 more firmly against the tensile force of the electric wire.

  Next, the pin lever of the second embodiment will be described.

  FIGS. 9A and 9B are diagrams showing the overall configuration of the pin lever of the second embodiment, wherein FIG. 9A is a plan view and FIG. 9B is a front view.

  Unlike the pin insulator 10 of the first embodiment, the pin insulator 110 does not include an electric wire fixture. A concave groove 111 that penetrates the center of the diameter in the horizontal direction is provided on the upper surface of the pin insulator 110, and a through hole 112 is provided continuously below the concave groove. A bolt-like pin 5 is provided at the lower portion of the pin insulator 110 to attach it to the armrest 6 of the utility pole.

  The width of the concave groove 111 is equal to the outer diameter of the electric wire 1, and the shape of the bottom surface 111 a substantially matches the outer shape of the electric wire 1.

  The shape of the through hole 112 is that a cylinder having a thickness equal to the outer diameter of the electric wire 1 placed at the position of the bottom surface 111a of the concave groove 111 is rotated about 30 ° to the right with the center of the diameter of the pin insulator 110 as the rotation axis. However, when it is shifted downward several centimeters, it substantially matches the locus drawn by the cylinder, but the lowermost portion of the through-hole 112 has a shape narrower than the locus. When the through-hole 112 is brought into contact with the lowermost surface 112 a through the electric wire 1, the constricted shape of the lowermost surface 112 a bites into the insulating coating of the electric wire 1, so that the electric wire 1 is firmly supported by the lowermost surface 112 a of the through-hole 112.

  Next, the attachment method of the electric wire to the pin insulator of 2nd Embodiment is demonstrated. FIG. 10 is a perspective view showing a state after an electric wire is attached to the pin insulator of the second embodiment.

  The pin insulator 3 is attached to the arm metal 6 in advance by inserting the pin 5 of the pin insulator 110 into the hole 6a of the arm pole 6 of the utility pole and lightly fastening it with a nut. Next, the electric wire 1 is dropped horizontally into the concave groove 111 of the pin insulator 110 and placed on the bottom surface 11 a of the concave groove 111. Next, while holding the wire fitting 1, the pin insulator 110 is twisted up in the right direction when viewed from below (that is, twisted down in the left direction when viewed from above), and the wire 1 is passed through the through hole of the pin insulator 110. The lowermost surface 112a of 112 is made to contact. Finally, the pin 5 is fastened with a nut, and the pin insulator 3 is firmly attached to the arm bracket 6. At this time, the nut is tightened in the right direction when viewed from below (that is, when viewed from the left direction when viewed from above), and as a result, the electric wire 1 is viewed in the right direction when viewed from below (that is, when viewed from the left direction). With a slight shift, the electric wire 1 is brought into stronger contact with the lowermost surface 112 a of the through hole 112. As described above, the electric wire 1 is firmly supported by the pin insulator 110.

  Although the pin insulator of the embodiment has been described above, the present invention is not limited to this. For example, as shown in FIGS. 11 and 12, the pin insulator may have a concave groove on the side surface. The pin insulator 210 includes a detachable electric wire fixture 20. The side surface of the pin insulator 210 is provided with a concave groove 211 that penetrates in the horizontal direction to the center of its diameter, and a through hole 212 is provided continuously below the concave groove 211. Below the pin insulator 210, a bolt-shaped pin 5 for being attached to the armrest 6 of the utility pole is provided. The width of the concave groove 211 is equal to the outer diameter of the electric wire 1, and the shape of the bottom surface 211 a substantially matches the outer shape of the electric wire 1.

  As shown in FIG. 11, in order to attach an electric wire to the pin insulator 210, first, the electric wire fixture 20 in a state where the electric wire 1 penetrates the inside is passed horizontally through the concave groove 211 of the pin insulator 210, It is placed on the innermost surface 211 a of the groove 211. Next, while holding the wire fixture 20, the pin insulator 210 is twisted rightward when viewed from below (that is, twisted leftward when viewed from above), and the wire fastener 20 is moved to the pin insulator 210. It is loaded into the through hole 212 and brought into contact with the lowermost surface 212a. Thereby, the electric wire 1 is firmly supported by the pin insulator 210 like the above-mentioned embodiment.

It is a perspective view showing the whole pin insulator composition of a 1st embodiment. It is a figure which shows a pin insulator, (A) is a top view, (B) is a front view. It is a figure which shows an electric wire fixture as an example of the means to hold | maintain an electric wire, (A) is a top view, (B) is a front view. It is a figure which shows an electric wire attachment tool, (A) is a perspective view which shows the closed state, (B) is a perspective view which shows the state which the opening part opened. It is a figure which shows the state which has attached the electric wire to the pin insulator of 1st Embodiment, (A) is a perspective view, (B) is a top view. It is a figure which shows the state after attaching an electric wire to the pin insulator of 1st Embodiment, (A) is a perspective view, (B) is a top view. It is a figure which shows the 1st modification of the pin insulator of 1st Embodiment, (A) is a top view of an electric wire attachment tool, (B) is a top view of a pin insulator, (C) is after attaching an electric wire to a pin insulator. It is a top view which shows the state of. It is a figure which shows the 2nd modification of the pin insulator of 1st Embodiment, (A) is a top view of an electric wire attachment tool, (B) is a top view of a pin insulator, (C) is after attaching an electric wire to a pin insulator. It is a top view which shows the state of. It is a figure which shows the whole structure of the pin lever of 2nd Embodiment, (A) is a top view, (B) is a front view. It is a perspective view which shows the state after attaching an electric wire to the pin insulator of 2nd Embodiment. It is a perspective view which shows the state after attaching an electric wire to the pin insulator which has a ditch | groove on a side surface. It is a figure which shows a pin insulator, (A) is a top view, (B) is a front view. It is a perspective view which shows the attachment state of the electric wire to the conventional pin insulator.

Explanation of symbols

1: electric wire, 2: bind wire, 3: pin insulator, 4: recessed portion of pin insulator, 5: pin, 6: arm metal, 10: pin insulator, 11: concave groove, 12: through hole, 20: electric wire attachment 21: stopper, 22: claw, 23: receiving hole, 24: convex part, 110: pin insulator, 111: concave hole, 112: through hole, 210: pin insulator, 211: concave groove, 212: through hole.

Claims (7)

A pin insulator for supporting an electric wire,
A concave groove for entering the electric wire in a state of extending horizontally from the surface;
A through hole provided continuously in the concave groove and supporting the electric wire in a horizontal direction when the pin insulator is twisted with the electric wire inserted;
Holding means for holding the electric wire in an unmovable state in the through hole;
Pin lion characterized by having. In the pin insulator of claim 1,
The holding means is housed in the concave groove and the through hole, has a shape that is firmly held in the through hole, is formed in a cylindrical shape through which the electric wire passes, and the electric wire penetrating through the inside is firmly attached. A pin insulator, characterized in that the pin insulator is an electric wire fixture to be held on a pin. In the pin insulator of claim 2,
The wire fitting is formed in a substantially dumbbell shape,
The pin insulator is characterized in that the concave groove and the through hole substantially match the outer shape of the dumbbell-shaped handle portion. In the pin insulator of claim 2,
The pin insulator is formed in a substantially drum shape. In the pin insulator of claim 2,
The pin insulator is formed in a substantially abacus bead shape. In the pin insulator of claim 1,
The holding means is a shape portion in which a predetermined portion of the through hole is formed to be narrower than the outer shape of the electric wire, and the electric wire is firmly held by a frictional force between the portion and the electric wire. Characteristic pin lion. A method for supporting an electric wire on a pin insulator,
A concave groove for entering the electric wire in a state of extending horizontally from the surface;
A through hole provided continuously in the concave groove and supporting the electric wire in a state of passing through the electric wire in a horizontal direction when the pin insulator is twisted with the electric wire inserted; and the electric wire is inserted into the through hole. Using a pin lever provided with a holding means for holding the immovable state,
Fit the electric wire into the concave groove,
A method for supporting an electric wire, wherein the pin insulator is twisted to hold the electric wire in an unmovable state.

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