JP2016005363A - Electric wire protection device and electric wire monitoring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electric wire protection device capable of protecting an electric wire from being cut off by a fallen tree.SOLUTION: A protection device 10 is supported by an insulator Si through a support metal fitting 3. The protection device 10 comprises a gear box 1 and a movable arm 12. A fixed arm 11 projects from the gear box 1. An electric wire W can be held by closing the movable arm 12 on the fixed arm 11. The gear box 1 includes, inside the gear box 1, a ratchet device 13 capable of rotating in a direction of closing the movable arm 12 on the fixed arm 11. The protection device 10 comprises a control unit 14 for actuating the ratchet device 13 by driving a rotary solenoid 2 so that connection between the fixed arm 11 and the movable arm 12 is broken, when a predetermined pressure value occurs at a pressure sensor 12s provided on the movable arm 12. The protection device 10 can protect the electric wire W by breaking the connection between the fixed arm 11 and the movable arm 12 holding the electric wire to allow the electric wire W to drop down before the electric wire W is cut off.

Description

  The present invention relates to a wire protection device and a wire monitoring system. In particular, the present invention relates to a structure of an electric wire protection device that protects an electric wire installed on a utility pole from being cut by a load caused by a fallen tree or the like, and an electric wire monitoring system using the electric wire protection device.

  In mountainous areas, the ground may loosen due to rainfall or snowfall, and large trees may fall. And this fallen tree may incline to the electric wire constructed in the utility pole, and an electric wire may be cut | disconnected by the load.

  In order to avoid such a situation, a bind wire that is a spiral bind wire that supports an electric wire on an insulator provided on a metal arm fixed to a utility pole and has a strength that can be broken by a load caused by a fallen tree is disclosed. (For example, refer to Patent Document 1).

  The bind wire according to Patent Document 1 is supposed to be able to prevent the electric wire from being cut since the wire breaks before the electric wire is cut when a load caused by the fallen tree acts on the electric wire.

JP 2010-226824 A

  However, the bind wire according to Patent Document 1 breaks when a load due to fallen trees acts on the electric wire, and therefore there is a problem that the bind wire cannot be reused. Moreover, since the bind wire according to Patent Document 1 breaks when a load due to fallen trees acts on the electric wire, there is a problem in that it takes time to perform restoration work for supporting the electric wire on the insulator using a new bind wire.

  Furthermore, although the bind wire by patent document 1 can prevent that an electric wire cut | disconnects, there also exists a problem that the load to the electric wire by fallen tree cannot be centrally monitored.

  There is a need for an electric wire protection device that can protect an electric wire installed on a utility pole from being cut by a load caused by a fallen tree and the like, and that can be easily restored, and an electric wire monitoring system using the electric wire protection device. The above can be said to be the subject of the present invention.

  This invention is made in view of such a subject, and provides the electric wire protection apparatus which can protect from an electric wire being cut | disconnected by the load by fallen trees etc., and the electric wire monitoring system using this electric wire protection device. With the goal.

  The inventor has a gear box having a fixed arm that is supported by an insulator and receives an electric wire, and a shaft portion that is rotatably connected to the gear box, and a movable arm that can be opened and closed with respect to the fixed arm. And a ratchet device that can rotate only in the direction in which the movable arm closes with respect to the fixed arm, and has a fixed pressure and a movable arm when a predetermined pressure value is generated in a pressure sensor provided on the movable arm. It is found that by operating the ratchet device so that the connection of the wire is released, the wire can be protected from being cut by a load caused by a fallen tree or the like, and based on this, the following new wire protection device and wire Invented the surveillance system.

  (1) The electric wire protection device according to the present invention is an electric wire protection device that protects the electric wire from being cut from a load of about a fallen tree acting on the electric wire supported via a lever provided on a metal arm fixed to a utility pole. A gear box protruding from a fixed arm that receives the electric wire from the outer peripheral direction thereof, a movable arm that extends in a centrifugal direction from a shaft portion rotatably connected to the gear box and is openable and closable with respect to the fixed arm; When a predetermined pressure value is generated in the ratchet device capable of rotating the movable arm in the closing direction with respect to the fixed arm and the pressure sensor provided on the movable arm, the connection between the fixed arm and the movable arm is released. And a controller for driving the ratchet device by driving the rotating means.

  (2) The rotating means is composed of a rotary solenoid in which the rotation angle of the output shaft thereof is regulated, and the ratchet device is disposed inside the gear box, and the ratchet gear having the shaft portion extending in the axial direction. And the rotation shaft is fixed to the inner wall surface of the gear box, and when the claw portion provided at one end is tilted toward the ratchet teeth of the ratchet gear, the ratchet claw meshes with the ratchet teeth. A leaf spring that engages with the other end side of the ratchet pawl, and urges the force in a direction away from the ratchet teeth, and is rotatably held in the gear box in one direction. A guide ring having a cam at the end that tilts the claw portion of the ratchet claw toward the ratchet tooth when rotated to the other direction and moves away from the claw portion of the ratchet claw when rotated in the other direction; Serial connected to the guide ring, wherein it preferably has a ring plate which projects from the central opening to the boss of the output shaft and detent linkage hole of the rotary solenoid.

  (3) The gear box further includes a control box formed on a side surface thereof, and the control box has at least one control circuit for controlling the rotating means and at least one for energizing the rotating means. It is preferable to have a battery inside.

  (4) A support fitting that is supported by the lever and that detachably supports the gear box is further provided, and the support fitting includes a pair of semi-arc-shaped band members that sandwich an outer periphery of the lever portion of the lever. A support arm that is bifurcated and is fastened to the bolt receiving piece of the band member with a bolt member, and a base end portion that is coupled to a central portion of the support plate, and the support plate includes the gear It is preferable to have a bolt hole into which a bolt member fastened to a plurality of female screw portions provided on the upper surface of the box can be freely inserted.

  (5) It is preferable to further include a solar cell panel supported by the power pole, outputting at least electric power for driving the rotating means, and connectable to the control unit.

  (6) In the electric wire monitoring system according to the present invention, the control circuit includes a transmission circuit that wirelessly transmits pressure value data generated from the pressure sensor and location data of the electric wire protection device, and is transmitted from the transmission circuit. The wire monitoring device includes a receiving unit that receives the pressure value data and the location data, and the wire monitoring device includes a display unit that displays the pressure value data and the location data.

  When the load of the fallen tree acts on the electric wire, the electric wire protection device according to the present invention detects this pressure value by the pressure sensor provided on the movable arm, and when the pressure exceeds the predetermined pressure value, the rotating means is driven to turn the ratchet device. Since it is actuated, the connection between the fixed arm and the movable arm is released. And before an electric wire cuts, an electric wire can be released from an insulator. The electric wire protection device according to the present invention can hold the electric wire again with the fixed arm and the movable arm, and the restoration work is easy.

  An electric wire monitoring system according to the present invention includes an electric wire monitoring device having a receiving unit that receives pressure value data and location data transmitted from a transmission circuit provided in the electric wire protection device. The electric wire monitoring device includes pressure value data and location data. Since the display part which displays is displayed, the load condition of several electric wires can be centrally monitored.

It is a front view which shows the structure of the electric wire protection apparatus by one Embodiment of this invention, and is a state figure which mounted the electric wire protection apparatus on the utility pole. It is a front view which shows the structure of the electric wire protection apparatus by the said embodiment. It is a top view which shows the structure of the electric wire protection apparatus by the said embodiment. It is a rear view which shows the structure of the electric wire protection apparatus by the said embodiment. It is a right view which shows the structure of the electric wire protection apparatus by the said embodiment, and has shown one part with sectional drawing. It is a perspective exploded view which shows the structure of the electric wire protection apparatus by the said embodiment. FIG. 7 is an exploded perspective view showing the configuration of the wire protection device according to the embodiment, and the wire protection device is viewed from a different direction from FIG. 6. It is a principal part expanded vertical sectional view which shows the structure of the ratchet apparatus with which the electric wire protection apparatus by the said embodiment is equipped, and is a normal state figure. FIG. 9 is an enlarged vertical cross-sectional view showing a configuration of a ratchet device provided in the wire protection device according to the embodiment, and is a state change diagram of FIG. 8. It is a functional block diagram which shows the structure of the electric circuit of the electric wire protection apparatus by the said embodiment. It is a functional block diagram which shows the structure of the electric wire monitoring system using the electric wire protection apparatus by the said embodiment.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
[Configuration of wire protection device]
Initially, the structure of the electric wire protection apparatus by one Embodiment of this invention is demonstrated.

  FIG. 1 is a front view illustrating a configuration of an electric wire protection device according to an embodiment of the present invention, and is a state diagram in which the electric wire protection device is mounted on a utility pole. FIG. 2 is a front view showing the configuration of the wire protection device according to the embodiment. FIG. 3 is a plan view showing the configuration of the wire protection device according to the embodiment.

  FIG. 4 is a rear view showing the configuration of the wire protection device according to the embodiment. FIG. 5 is a right side view showing the configuration of the wire protection device according to the embodiment, and a part thereof is shown in a sectional view.

  FIG. 6 is a perspective exploded view showing the configuration of the wire protection device according to the embodiment. FIG. 7 is a perspective exploded view showing the configuration of the wire protection device according to the embodiment, and the wire protection device is viewed from a different direction from FIG. 6.

  FIG. 8 is an enlarged vertical cross-sectional view showing a main part of the structure of the ratchet device provided in the wire protection device according to the embodiment, and is a normal state diagram. FIG. 9 is an enlarged vertical cross-sectional view of a main part showing the configuration of the ratchet device provided in the wire protection device according to the embodiment, and is a state change diagram of FIG.

(overall structure)
Referring to FIG. 1, an electric wire protection device (hereinafter, abbreviated as a protection device) 10 according to an embodiment of the present invention is provided on a lever Si fixed to a power pole P via a support fitting 3. It is supported. When a tree Tr standing up around the power pole P falls and a predetermined load is applied to the electric wire W, the protection device 10 releases the connection between the fixed arm 11 and the movable arm 12 holding the electric wire W. The electric wire W can be protected by dropping the electric wire W before the electric wire W is cut.

  1 to 7, the protection device 10 includes a cylindrical gear box 1 and a movable arm 12. The gear box 1 projects the fixed arm 11 in the centrifugal direction. The fixed arm 11 is formed with a semicircular cutout 11k at the tip (see FIG. 2 or FIGS. 7 and 8). The notch 11k can receive the electric wire W from the outer peripheral direction.

  Referring to FIGS. 1 to 7, the gear box 1 has a shaft portion 1ts protruding from one surface (see FIG. 4 or FIGS. 5 and 6). The shaft portion 1ts is rotatably connected to the gear box 1. The movable arm 12 has a base end portion connected to the shaft portion 1ts so as to prevent rotation. The movable arm 12 is arranged so as to extend in the centrifugal direction from the shaft portion 1ts (see FIG. 4). The movable arm 12 is also formed with a semicircular cutout 12k at the tip (see FIG. 2, FIG. 7 and FIG. 8).

  With reference to FIG. 4 or FIG. 6, when the shaft portion 1ts is rotated in one direction, the electric wire W can be held between the fixed arm 11 and the movable arm 12 (see FIG. 2). On the other hand, when the connection between the fixed arm 11 and the movable arm 12 is released by the mechanism of the ratchet device 13 described later, the shaft portion 1ts is rotatable in one direction or the other direction. And the movable arm 12 can be opened with respect to the fixed arm 11 (refer FIG. 2). In FIG. 2, the state where the movable arm 12 is closed and the state where the movable arm 12 is opened are both shown by solid lines.

  Referring to FIG. 7, the gear box 1 includes a ratchet device 13 therein. The ratchet device 13 includes a ratchet gear 1t and a ratchet pawl 1p. Referring to FIG. 8, in a state where the ratchet pawl 1p is engaged with the ratchet gear 1t, the movable arm can be rotated only in the closing direction with respect to the fixed arm 11 (see FIG. 2 or FIG. 4).

  Referring to FIG. 6 or FIG. 7, the movable arm 12 has a pressure sensor 12s attached to the circular arc surface at the tip. The pressure sensor 12s can convert a pressure value received from the electric wire W into an electric signal. The pressure sensor 12 s is connected to the control unit 14.

  1 to 7, the protection device 10 includes a rotary solenoid 2 serving as a rotating unit. The rotary solenoid 2 is attached to the gear box 1 from the side opposite to the shaft portion 1ts. The rotary solenoid 2 projects the output shaft 2s from one surface (see FIG. 6 or FIG. 7). The output shaft 2s is connected to the ratchet device 13. When the rotary solenoid 2 is driven, the engaged state between the ratchet gear 1t and the ratchet pawl 1p can be released (see FIG. 9).

  Referring to FIGS. 1 to 7, when a predetermined pressure value is generated in the pressure sensor 12 s by the fallen tree, the control unit 14 drives the rotary solenoid 2 so that the connection between the fixed arm 11 and the movable arm 12 is released. Then, the ratchet device 13 is operated. And the protection apparatus 10 can protect the electric wire W by dropping the electric wire W before the electric wire W is cut | disconnected.

(Configuration of gear box)
Next, the configuration of the gear box will be described. 1 to 7, the gear box 1 has a control box 14f formed on the side surface thereof. The control box 14f includes a control unit 14 therein. Moreover, the gear box 1 forms the base part 15 in the upper part. A support fitting 3 to be described later can be fixed to the pedestal portion 15. Further, the gear box 1 projects three screw seats 16 for fixing the rotary solenoid 2 through the mounting bracket 21 in the outer peripheral direction (see FIG. 6 or FIG. 7). The gear box 1 is integrally formed with a fixed arm 11, a control box 14f, a pedestal portion 15, and a screw seat 16 (see FIG. 6 or FIG. 7).

(Configuration of rotating means)
Next, the configuration of a rotary solenoid that serves as a rotating means will be described. 2 to 7, the rotary solenoid 2 includes a cylindrical stator (stator) and a rotor (rotor). The stator is covered with an insulating cylindrical housing and constitutes an outer shell of the rotary solenoid 2. The rotor is rotatably held inside the stator. The rotor extends an output shaft 2s on one side of the stator (see FIG. 6).

  The rotary solenoid 2 shown in FIGS. 2 to 7 uses a permanent magnet for the rotor, and rotates in response to repulsion and attraction between the permanent magnet provided on the rotor and the magnetic pole generated in the yoke (iron core). The rotary solenoid 2 is a magnetic return type in which the output shaft 2s is rotated by a predetermined angle in one direction when energized and switched to non-energization to return to the origin and hold the output shaft 2s by the magnetic force of a permanent magnet. It was used. The rotary solenoid configured as described above is disclosed in, for example, Japanese Patent Application Laid-Open No. 2008-300404.

  In general, a rotary solenoid converts a linear motion of an attracted iron core into a rotational motion of an output shaft by a three-dimensional cam mechanism by energizing a coil arranged inside the main body. In this case, since the output shaft is combined with linear motion and rotational motion, a commercially available rotary solenoid 2 whose output shaft directly rotates is selected.

  Referring to FIG. 6, the output shaft 2 s has a part of the outer periphery that is flat. Further, the output shaft 2s has a stopper member 22 fixed to the base end portion thereof. The stopper member 22 is prevented from rotating around the output shaft 2s at the base end. The stopper member 22 can rotate integrally with the output shaft 2s. The stopper member 22 extends from the center of the stop piece 22a.

  On the other hand, referring to FIG. 6, the rotary solenoid 2 has a disk-shaped rotation restricting member 23 fixed to its end face. The rotation restricting member 23 forms a notch 23d that is opened in a V shape from the center. When the rotary solenoid 2 is energized, the stop piece 22a comes into contact with one stop wall of the notch 23d, thereby restricting the rotation of the output shaft 2s in one direction. When the rotary solenoid 2 is deenergized, the output shaft 2s returns to the initial state, and the stop piece 22a contacts the other stop wall of the notch 23d, so that the output shaft 2s rotates in the other direction. Movement is regulated.

  Referring to FIG. 6 or FIG. 7, the protection device 10 includes a disk-shaped mounting bracket 21. The mounting bracket 21 has a circular hole 21h at the center. The output shaft 2s can be fitted into the hole 21h. The mounting bracket 21 has a pair of screw holes 211 and 211 opened. On the other hand, referring to FIG. 6, the rotation restricting member 23 forms a pair of female screw portions 23s and 23s. The fitting 21 can be fixed to the rotary solenoid 2 by inserting the screw member 21s into the screw hole 211 and fastening it to the female screw portion 23s.

  With reference to FIG. 6 or FIG. 7, the mounting bracket 21 projects three mounting seats 21 b corresponding to the three screw seats 16 provided in the gear box 1 in the outer peripheral direction. The rotary solenoid 2 can be fixed to the gear box 1 via the mounting bracket 21 by inserting the screw member 21 c into the screw hole opened in the mounting seat 21 b and fastening it to the screw seat 16. Further, by fixing the mounting seat 21b to the screw seat 16, the ratchet accommodating chamber 1h opened to the front side can be sealed. In addition, the opening side of the mounting bracket 21 and the opening side of the ratchet storage chamber 1h are configured to be fitted with a step.

(Configuration of support bracket)
Next, the structure of the support metal fitting will be described. Referring to FIG. 2 or FIG. 5 and FIG. 6, the protection device 10 further includes a support fitting 3. The support fitting 3 is supported by the insulator Si and can support the gear box 1 in a detachable manner. The support fitting 3 includes a pair of semicircular band members 31 and 31 and a support member 32. The pair of band members 31 and 31 sandwich the outer periphery of the insulator portion of the insulator Si using the bolt member 31b and the nut 31n. It is preferable that the pair of band members 31 and 31 sandwich the outer periphery of the insulator portion of the insulator Si via a belt-shaped rubber plate.

  Referring to FIG. 2 or FIG. 5 and FIG. 6, the support member 32 includes a plate-like support arm 32a and a support plate 32p. The support arm 32a is bifurcated. The support arms 32a are fastened to the bolt receiving pieces 31t of the band member 31 by bolt members 31b. Further, the base end portion of the support arm 32a is joined to the central portion of the support plate 32p by welding (see FIG. 6).

  Referring to FIG. 6, the support plate 32p has a pair of bolt holes 32h and 32h. On the other hand, the base portion 15 has a pair of female screw portions 15s and 15s formed on the upper surface. The support member 32 can be fixed to the pedestal portion 15 by inserting the bolt member 32b into the bolt hole 32h and fastening the bolt member 32b to the female screw portion 15s. In this way, the support fitting 3 can detachably support the gear box 1.

(Configuration of ratchet device)
Next, the configuration of the ratchet device will be described. FIG. 8 is an enlarged vertical cross-sectional view showing a main part of the structure of the ratchet device provided in the wire protection device according to the embodiment, and is a normal state diagram. FIG. 9 is an enlarged vertical cross-sectional view of a main part showing the configuration of the ratchet device provided in the wire protection device according to the embodiment, and is a state change diagram of FIG.

  7 to 9, the ratchet device 13 includes a ratchet gear 1t, a ratchet claw 1p, and a leaf spring 1s. The ratchet gear 1t is rotatably disposed inside the ratchet accommodating chamber 1h (see FIG. 7). The ratchet gear 1t extends the shaft portion 1ts toward one end portion. The base portion of the shaft portion 1ts is rotatably supported by the gear box 1. Moreover, the shaft part 1ts has the movable arm 12 fixed to the tip end side thereof (see FIG. 3 or FIG. 6). The ratchet gear 1t extends a columnar shaft portion 1tt to the other end side. The shaft portion 1tt is rotatably supported on the back side of a boss 1rb provided at the center of a ring plate 1r described later.

  Referring to FIGS. 7 to 9, the ratchet pawl 1p has its pivot shaft fixed to the inner wall surface (bottom surface) of the ratchet storage chamber 1h. As shown in FIG. 8, when the claw provided on one end of the ratchet claw 1p is tilted toward the ratchet teeth of the ratchet gear 1t, the claw can be engaged with the ratchet teeth.

  Referring to FIGS. 7 to 9, the leaf spring 1s has its fixed end fixed to the inner wall surface (bottom surface) of the ratchet storage chamber 1h. The leaf spring 1s has its free end engaged with the other end of the ratchet pawl 1p. The leaf spring 1s urges the force in the direction in which the claw portion of the ratchet claw 1p separates from the ratchet teeth (see FIG. 9).

  7 to 9, the ratchet device 13 includes a guide ring 1g and a ring plate 1r. The guide ring 1g is rotatably held inside the ratchet storage chamber 1h. Further, the guide ring 1g is regulated so that its rotation angle is within a predetermined range. The guide ring 1g has a cam 1c at its end.

  Referring to FIG. 8, in a state where guide ring 1g is rotated clockwise R with respect to gear box 1 and stopped, cam 1c tilts the claw portion of ratchet claw 1p toward the ratchet teeth. . On the other hand, in a state where the guide ring 1g is rotated by a predetermined angle in the counterclockwise direction L with respect to the gear box 1 and stopped, the cam 1c can move in a direction away from the claw portion of the ratchet claw 1p (see FIG. 9). The engagement between the ratchet pawl 1p and the ratchet gear 1t can be released. In the state shown in FIG. 9, the other end of the guide ring 1g is engaged so as to stand the claw portion of the ratchet claw 1p.

  Referring to FIG. 7, the guide ring 1g has a plurality of arc-shaped claw pieces protruding toward the ring plate 1r. On the other hand, the ring plate 1r has an arc-shaped locking hole that fits into the claw piece of the guide ring 1g. Rotating motion can be transmitted from the ring plate 1r to the guide ring 1g by engaging the claw pieces of the guide ring 1g with the locking holes of the ring plate 1r.

  Referring to FIG. 7, the guide ring 1g protrudes from the center portion of a cylindrical boss 1rb. The boss 1rb has a connection hole 1rh that can be prevented from rotating with the output shaft 2s of the rotary solenoid 2 (see FIG. 6).

  Referring to FIG. 6 or FIG. 7, by connecting the output shaft 2s of the rotary solenoid 2 to the boss 1rb, the rotational motion of the output shaft 2s can be transmitted to the guide ring 1g via the ring plate 1r.

  Referring to FIG. 7, the ratchet device 13 further includes an inner diameter retaining ring 1f. By fitting the inner diameter retaining ring 1f into an annular groove formed in the inner wall of the ratchet accommodating chamber 1h, movement of the ring plate 1r, the guide ring 1g, and the ratchet gear 1t in the thrust direction (axial direction) is restricted. Yes.

  Referring to FIG. 8, in a normal state where the rotary solenoid 2 is not energized (see FIG. 6), the ratchet pawl 1 p is engaged with the ratchet gear 1 t. Only turning in the counterclockwise direction L is allowed. That is, it can rotate only in the direction in which the movable arm 12 is closed with respect to the fixed arm 11 (see FIG. 2 or FIG. 4). And the electric wire W can be clamped with a predetermined pressure.

  With reference to FIG. 1, when a tree Tr falls and a predetermined load is applied to the electric wire W, a predetermined pressure value is generated in the pressure sensor 12 s provided on the movable arm 12 (see FIG. 6 or FIG. 7). Then, when an electrical signal having a predetermined pressure value is transmitted from the pressure sensor 12s, the control unit 14 energizes the rotary solenoid 2 (see FIG. 6 or FIG. 7). When the rotary solenoid 2 is energized, the output shaft 2s rotates in one direction (see FIG. 6).

  Referring to FIG. 9, when output shaft 2 s rotates in one direction, guide ring 1 g can be rotated counterclockwise L by a predetermined angle α with respect to gear box 1. And the cam 1c can cancel | release engagement of the ratchet nail | claw 1p and the ratchet gear 1t by moving in the direction away from the nail | claw part of the ratchet nail | claw 1p. That is, the ratchet gear 1t can rotate in the clockwise direction R or the counterclockwise direction L, and the electric wire W can be released from the movable arm 12.

(Configuration of control unit and electric circuit)
Next, the structure of a control part and an electric circuit is demonstrated. FIG. 10 is a functional block diagram showing the configuration of the electric circuit of the wire protection device according to the embodiment.

  1 to 7, the gear box 1 has a control box 14f formed on the side surface thereof. The control box 14f includes a printed circuit board 14p and two batteries 14b and 14b (see FIG. 2 or FIG. 3). Further, the control box 14f is provided with a jack 14j on the outer wall for electrical connection with a solar cell panel 4 described later (see FIG. 2 or FIG. 7).

  Referring to FIGS. 2 to 7 and 10, a plurality of electrical components and electronic components are mounted on the printed circuit board 14 p, and constitutes a control circuit 14 k for controlling at least the rotary solenoid 2. The battery 14b supplies power for driving the control circuit 14k. The battery 14b supplies power for energizing the rotary solenoid 2.

  Referring to FIG. 10, the protection device 10 is configured to operate with two batteries 14b and 14b. However, as shown in FIG. 1, the solar cell panel 4 may be installed on the utility pole P, and the protection device 10 may be configured to operate with electric power supplied from the solar cell panel 4. In this case, it is preferable that a plug is provided at a terminal of a power cable (not shown) extending from the solar cell panel 4 so that the plug can be connected to the jack 14j.

(Configuration of control circuit)
Next, the configuration of the control circuit will be described. Referring to FIG. 10, the control circuit 14k includes a CPU (not shown) that performs a control operation in accordance with a preset program, and a ROM and RAM (not shown) that are storage means for storing pressure value data and the like. ) Is included.

  Referring to FIG. 10, the control circuit 14k includes a detection circuit 141, a comparison circuit 142, and a determination circuit 143. The detection circuit 141 is connected to the pressure sensor 12s. Further, the control circuit 14k includes a drive circuit 144 and a transmission circuit 145. The drive circuit 144 can drive the rotary solenoid 2 upon receiving a command. The transmission circuit 145 can transmit pressure value data and the like wirelessly.

  Referring to FIG. 10, the pressure value is transmitted from the pressure sensor 12 s to the detection circuit 141. The detection circuit 141 removes noise from the pressure value via a low-pass filter, converts the pressure value, which is an analog signal, into a digital signal, and transmits the digital signal to the comparison circuit 142.

  Referring to FIG. 10, the comparison circuit 142 compares the pressure value data transmitted from the detection circuit 141 with reference pressure value data stored in advance, and generates a difference signal between the pressure value data and the reference pressure value data. Transmit to the determination circuit 143. As the reference pressure value data, for example, pressure value data to the extent that the electric wire W is cut by a fallen tree is set.

  Referring to FIG. 10, when the difference signal transmitted from comparison circuit 142 is “0” or “+”, determination circuit 143 transmits a signal for driving circuit 144 to operate. For example, the determination circuit 143 outputs a signal for switching the switch circuit in the drive circuit 144 from OFF to ON so that the drive circuit 144 operates. When the difference signal transmitted from the comparison circuit 142 is “−”, the determination circuit 143 does not transmit a signal for operating the drive circuit 144.

  Referring to FIG. 10, when an operation signal is transmitted from determination circuit 143, drive circuit 144 applies a predetermined voltage to rotary solenoid 2 and energizes rotary solenoid 2 for a predetermined time. Thereby, before the electric wire W is cut | disconnected by the mechanism of the ratchet apparatus 13 mentioned above (refer FIG. 7), the electric wire W can be dropped.

  Referring to FIG. 10, pressure value data is transmitted from detection circuit 141 to transmission circuit 145, and a difference signal is transmitted from determination circuit 143. The transmission circuit 145 can wirelessly transmit the pressure value data and the like toward the electric wire monitoring device 50 (see FIG. 11) described later. The transmission circuit 145 may be configured to transmit pressure value data or the like only when there is a transmission request.

[Operation of wire protection device]
Next, the operation and effect of the protection device 10 according to the embodiment will be described. Referring to FIGS. 1 to 7, the protection device 10 is supported by the insulator Si via the support fitting 3. The protection device 10 includes a gear box 1 that protrudes from a fixed arm 11 that receives an electric wire W, and a movable arm 12 that can be opened and closed with respect to the fixed arm 11. The gear box 1 includes a ratchet device 13 that can rotate in a direction to close the movable arm 12 with respect to the fixed arm 11. A pressure sensor 12 s is attached to the movable arm 12.

  Referring to FIGS. 1 to 7, when a load about a fallen tree acts on the electric wire W, the protection device 10 detects this pressure value by a pressure sensor 12 s provided on the movable arm 12, and when the pressure becomes equal to or higher than a predetermined pressure value, The control unit 14 drives the rotary solenoid 2 to operate the ratchet device 13.

  The protection device 10 according to the embodiment can protect the wire W from being cut since the connection between the fixed arm 11 and the movable arm 12 is released before the wire W is cut. Unlike the prior art, the protection device 10 according to the embodiment has an effect that the electric wire W can be gripped again by the fixed arm 11 and the movable arm 12 and the restoration work is easy.

The wire protection device according to the present invention can be expected to have the following effects.
(1) The disconnection of the electric wire resulting from a fallen tree or the like can be prevented.
(2) The electric wire restoration work becomes efficient and quick.

[Configuration of wire monitoring system]
Next, the configuration of the electric wire monitoring system according to an embodiment of the present invention will be described. FIG. 11 is a functional block diagram showing a configuration of an electric wire monitoring system using the electric wire protection device according to the embodiment.

  Referring to FIG. 11, a wire monitoring system (hereinafter abbreviated as a monitoring system) 100 according to an embodiment of the present invention includes a protection device 10 and may include a wire monitoring device 50. Referring to FIG. 10, the transmission circuit 145 can wirelessly transmit the pressure value data generated from the pressure sensor 12 s and can wirelessly transmit the location data of the protection device 10.

  Referring to FIG. 11, the electric wire monitoring device 50 includes a main body 51 that is a control unit, an antenna 52 that is a reception unit, and a display unit 53. The display unit 53 is a display as an entity. The antenna 52 can receive the pressure value data and the location data transmitted from the transmission circuit 145. The display unit 53 can display pressure value data and location data.

[Operation of wire monitoring system]
Next, operations and effects of the monitoring system 100 according to the embodiment will be described. Referring to FIG. 11, when the wire monitoring device 50 receives the pressure value data and determines that it is approximate to the reference pressure value data to the extent that the wire W is cut by a fallen tree, the “constant” A warning “with heavy load” can be displayed on the display unit 53. Thereby, it can be estimated that the tree Tr is in contact with the electric wire W. It is preferable to display the location data together with the warning display on the display unit 53, and it is possible to take measures before an accident occurs.

  Referring to FIG. 11, the wire monitoring device 50 can also receive a signal for operating the drive circuit 144 via the determination circuit 143. In this case, the location data is displayed together with the result display of “accident occurrence”. Is preferably displayed, and it is possible to rush to the accident site.

  Thus, the monitoring system 100 according to the embodiment can centrally monitor a plurality of electric wires. The electric wire monitoring system according to the present invention can centrally monitor the situation leading to a fallen tree accident and can be expected to improve the efficiency of maintenance work including restoration work.

1 Gearbox 1ts Shaft 2 Rotary solenoid (rotating means)
10 Protection device (electric wire protection device)
DESCRIPTION OF SYMBOLS 11 Fixed arm 12 Movable arm 12s Pressure sensor 13 Ratchet device A Arm metal P Electric pole Si Insulator W Electric wire

Claims (6)

A wire protection device that protects the wire from being cut from a load of about a fallen tree acting on the wire supported through a lever provided on the arm fixed to the utility pole,
A gear box protruding from a fixed arm that receives the electric wire from the outer peripheral direction;
A movable arm that extends in a centrifugal direction from a shaft portion rotatably connected to the gear box and can be opened and closed with respect to the fixed arm;
A ratchet device capable of rotating in a direction to close the movable arm with respect to the fixed arm;
A controller that operates the ratchet device by driving a rotation means so that the connection between the fixed arm and the movable arm is released when a predetermined pressure value is generated in the pressure sensor provided in the movable arm; An electric wire protection device comprising: The rotating means is composed of a rotary solenoid whose rotation angle of its output shaft is regulated,
The ratchet device
A ratchet gear disposed inside the gear box and extending in the axial direction of the shaft portion;
When the rotation shaft is fixed to the inner wall surface of the gear box and the claw portion provided at one end is tilted toward the ratchet teeth of the ratchet gear, the ratchet claw meshes with the ratchet teeth, and
A leaf spring that engages with the other end side of the ratchet pawl and urges the force in a direction in which the pawl portion separates from the ratchet teeth;
The ratchet claw is held inside the gear box so as to be rotatable, and when it is rotated in one direction, the claw portion of the ratchet claw is tilted toward the ratchet tooth, and when it is rotated in the other direction, the claw portion of the ratchet claw A guide ring having a cam that moves in a direction away from the end,
The wire protection device according to claim 1, further comprising: a ring plate that protrudes from a central portion of a boss that is connected to the guide ring and that has an opening connected to the output shaft of the rotary solenoid and capable of preventing rotation. The gear box further includes a control box formed on a side surface thereof,
The control box is
A control circuit for controlling at least the rotating means;
The electric wire protection device according to claim 1 or 2, further comprising at least one battery for energizing at least the rotating means. A support fitting that is supported by the lever and that detachably supports the gear box;
The support bracket is
A pair of semi-arc-shaped band members that sandwich the outer periphery of the lever portion of the lever;
A support arm that is bifurcated and is fastened with a bolt member to the bolt receiving piece of the band member, and a base member that is coupled to the center of the support plate,
The electric wire protection device according to any one of claims 1 to 3, wherein the support plate has a bolt hole into which a bolt member fastened to a plurality of female screw portions provided on an upper surface of the gear box can be inserted.   The electric wire protection device according to any one of claims 1 to 4, further comprising a solar cell panel supported by the utility pole, outputting at least electric power for driving the rotating means, and connectable to the control unit. The control circuit according to claim 3 includes a transmission circuit that wirelessly transmits pressure value data generated from the pressure sensor and location data of the wire protection device,
An electric wire monitoring device having a receiving unit for receiving the pressure value data and the location data transmitted from the transmission circuit;
The said electric wire monitoring apparatus is an electric wire monitoring system which has a display part which displays the said pressure value data and the said location data.

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