JP2011187382A - Disconnector operation detection mechanism, and disconnector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a disconnector operation detection mechanism easily resetting a lever of a limit switch fixed in a shifted state interlocking with an operation of a disconnector and correctly detecting an operating state of the disconnector, and to provide a disconnector equipped with the same. <P>SOLUTION: The disconnector operation detection mechanism includes: the limit switch equipped with the lever capable of shifting; and a biasing structure movable interlocking with the operation of the disconnector opening and closing an electric path and shifting the lever of the limit switch by biasing it, characterized by further including a reset structure movable interlocking with the operation of the disconnector and configured to contact the lever of the limit switch in a state of approaching the lever of the limit switch from an opposite side and displacing as the biasing structure separates from the lever of the limit switch. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a disconnector operation detection mechanism that detects the operation of a disconnector that opens and closes an electric circuit, and a disconnector including the disconnector operation detection mechanism, and more particularly, detects an operation state of the disconnector when an electric circuit is opened and closed using a limit switch. The present invention relates to a disconnector operation detection mechanism and a disconnector including the disconnector operation detection mechanism.

  Conventionally, maintenance and inspection of power generation and substation facilities at power generation and substations has been performed after the supply of current to the power generation and substation facilities is interrupted to ensure safety. Circuit breakers, switches, disconnectors, etc. are used as means for interrupting the supply of current to the power generation and transformation equipment. In particular, the disconnector is a device that, after interrupting the supply of current to the power generation / transformation equipment by a circuit breaker or a switch, further opens the electrical circuit to ensure that no current flows. Therefore, grasping the operating state of the disconnector, that is, whether the disconnector is in the open state or the closed state, is an important factor in ensuring the safety of maintenance inspection work. .

  The operating state of such a disconnector can be grasped at a control station or the like that controls the substation equipment. Specifically, the disconnector is provided with a disconnector operation detection mechanism that detects an operating state of the disconnector. The disconnector operation detection mechanism includes a limit switch including a lever configured to be displaceable, and an urging unit that urges and displaces the lever of the limit switch. It is configured to move in conjunction with the operation. The disconnector operation detection mechanism configured as described above moves the biasing means in conjunction with the operation of the disconnector, and biases and displaces the lever of the limit switch, thereby limiting the signal according to the operating state of the disconnector. The switch transmits and it is possible to grasp the operating state of the disconnect switch at a control station or the like.

  As a disconnector provided with such a disconnector operation detection mechanism, for example, a V-type disconnector and a horizontal two-point disconnector are known. As the disconnector operation detection mechanism provided in the V-type disconnector, a mechanism in which the biasing means is formed in a plate cam shape is used. The plate cam-shaped urging means is configured to rotate in conjunction with a blade opening / closing shaft that is movable when the disconnector opens and closes the electric circuit (see Patent Document 1). Further, as shown in FIG. 1, as a disconnector operation detection mechanism provided in the horizontal two-point disconnector, as shown in FIG. 1, a biasing means 3 is connected via a connecting member 5 to a twisting shaft R that is movable when the electrical path is opened and closed. The urging means 3 is connected and rotated in conjunction with the twisting axis R. Note that the lever of the limit switch used in the above disconnector operation detection mechanism is configured to automatically return to the position before being biased when the biasing means is separated from the lever.

Japanese Patent Laid-Open No. 2005-142017

  However, the disconnector operation detection mechanism as described above operates only when the disconnector operates, and depending on the operation frequency of the disconnector, the limit switch lever is maintained in a state of being biased by the biasing means. Sometimes it is done. If this condition continues for a long period of time, the grease for smooth movement of the lever will solidify or dust may accumulate between the lever and the limit switch body, causing the lever to move. It may stick in the state. In such a state, even if the urging means is separated from the lever, the lever does not return from the displaced state.

  As described above, if the limit switch lever is stuck in a displaced state, the limit switch cannot accurately detect the operating state of the disconnector when the circuit is opened or closed. It is not possible to grasp the operating state of. For this reason, it is necessary to confirm the operation state of the disconnector on site, and since it is necessary to return the fixed lever, much work is required.

  Therefore, the present invention can easily return the limit switch lever fixed in the displaced state in conjunction with the operation of the disconnecting device, and can detect the operating state of the disconnecting device accurately. It is an object to provide a mechanism and a disconnector including the mechanism.

  The disconnector operation detection mechanism according to the present invention is movable in conjunction with the operation of a limit switch including a lever configured to be displaceable and a disconnector that opens and closes an electric circuit, and biases and displaces the lever of the limit switch. In a disconnector operation detection mechanism comprising an urging means, it is also moved in conjunction with the operation of the disconnector and approaches the limit switch lever from the opposite side as the urging means moves away from the limit switch lever. And a return means configured to be able to come into contact with a lever of the limit switch in a displaced state.

  According to the disconnector operation detection mechanism having such a configuration, the return means that moves in conjunction with the operation of the disconnector approaches the lever of the limit switch in a displaced state from the opposite side, and is configured to be contactable. The lever of the limit switch that has been stuck in the displaced state can be easily returned in conjunction with the operation of the disconnector. Specifically, since the return means is moved in conjunction with the operation of the disconnector, the lever of the fixed limit switch can be returned together with the operation of the disconnector when opening and closing the electric circuit. It is possible to save time and labor.

  The displacement means that the limit switch lever is urged by the urging means to change its position. The return means returning from the displaced state to the state before the biasing.

  The disconnector operation detection mechanism according to the present invention preferably includes a pair of the limit switches, and is configured such that the return means contacts a lever of at least one limit switch in a displaced state.

  According to the disconnector operation detection mechanism having such a configuration, one of the pair of limit switches is provided by the return means being in contact with at least one lever in the displaced state among the pair of limit switches. Or, even in a situation where both levers are easily fixed, the levers can be easily returned.

  Specifically, one of the pair of limit switches is an open limit switch for detecting that the electric circuit is opened by the disconnector, and the other is an electric circuit closed by the disconnector. If the limit switch for closing is to detect whether the disconnector is always used, for example, depending on whether the circuit is always open or normally closed, the lever is fixed. A lever that does not work. Or it is not limited to either one state, and when the state in which it is always used fluctuates, sticking will occur in both levers. Therefore, the lever can be reliably returned by providing the return means so as to contact the lever on which the sticking occurs or both levers.

  In the disconnector operation detection mechanism according to the present invention, it is preferable that the return means is formed using an elastic member.

  According to the disconnector having such a configuration, the return means is formed by using the elastic member, so that the impact when contacting the lever of the limit switch can be reduced. In addition, after the return means comes into contact with the lever, if it is configured to move in the same direction and get over the lever, the return means comes into contact with the lever and elastically deforms, so the resistance when getting over the lever Can be reduced.

  The disconnector according to the present invention is movable in conjunction with the operation of a limit switch including a lever configured to be displaceable and the disconnector that opens and closes the electric circuit, and biases the lever of the limit switch to displace it. In a disconnector having a disconnector operation detection mechanism including a biasing means, the switch is also movable in conjunction with the operation of the disconnector, and the opposite side of the limit switch lever as the biasing means moves away from the limit switch lever. And a return means configured to be able to come into contact with the lever of the limit switch in a state of being approached and displaced.

  As described above, according to the present invention, the lever of the limit switch fixed in a displaced state can be easily returned in conjunction with the operation of the disconnector, and the operating state of the disconnector can be accurately detected. it can.

The figure which showed the conventional disconnector operation | movement detection mechanism with which a horizontal two-point disconnector is equipped. It is the figure which showed the disconnector operation | movement detection mechanism concerning 1st embodiment, (a) is a figure which shows the state which the lever displaced, (b) is the state which the return means contacted the lever in the displaced state. FIG. The top view which looked at (a) and (b) of Drawing 2 from the direction where a twist axis extends. It is the figure which showed the operation | movement of the open limit switch vicinity at the time of switching the disconnector in the same embodiment from the state which opened the electric circuit to the closed state, (a) shows the state which the lever biased and displaced FIG. 5B is a diagram in which the return means is in contact with the lever in a displaced state, and FIG. 5C is a diagram illustrating the state in which the lever is returned. The top view which looked at (a)-(c) of FIG. 4 from the direction where a twist axis | shaft extends. The figure which looked at the disconnector operation detection mechanism concerning a second embodiment from the end side of a twist axis. (A)-(c) is the figure which showed the operation | movement at the time of switching from the state where the disconnector in the same embodiment opened the electric circuit to the closed state, (a) is displaced by the lever being urged The figure which showed the state, (b) is the figure which the return means contacted the lever in the displaced state, (c) is the figure which shows the state which the lever returned. It is a figure which shows the disconnector operation | movement detection mechanism concerning other embodiment, (a) is a figure which shows the state which urged | biased the lever, (b) is a twist axis | shaft from the state of (a) The figure of the state which twisted 180 degrees. It is a figure which shows the disconnector operation | movement detection mechanism concerning other embodiment, (a) is a figure which shows the state which urged | biased the lever, (b) is a twist axis | shaft from the state of (a) The figure of the state which twisted 180 degrees.

<First embodiment>
Hereinafter, a first embodiment of the present invention will be described with reference to FIGS.

  First, the disconnector provided with the disconnector operation detection mechanism 1 according to the first embodiment will be briefly described. The disconnector is a horizontal two-point disconnector that is arranged in a substantially straight line with three insulators standing upright. In general, a plurality of insulators (usually three) are provided side by side.

  Of the three insulators of the horizontal two-point cutting path device, a blade extending in the horizontal direction is provided at the upper end portion of the insulator (center insulator) disposed at the center. The blade is configured using a conductive member, and both end portions thereof are configured to be connectable to upper ends of a pair of insulators (connection insulators) on both sides of the central insulator. On the other hand, a connection terminal portion to which an overhead wire is connected is provided at the upper end portion of the pair of connection insulators, and is configured to be connectable to both end portions of the blade. Thus, it can be made the state (state where an electric current flows) which closed the electric circuit by connecting between connection terminal parts with a braid | blade.

  Further, the blade is configured to be rotatable at a predetermined angle in the horizontal direction around the upper end portion of the central insulator. Specifically, a twisting shaft R extending substantially perpendicular to the blade is connected to the central portion of the blade, and the twisting shaft R is twisted at a predetermined angle (for example, 70 °), The blade is configured to be rotatable.

  The horizontal two-point cutting path device is provided with an operation unit for rotating the blade at a predetermined angle. The operation unit is configured to be able to twist the twisting shaft R at a predetermined angle manually or automatically. Then, by operating the operation unit, the blade is rotated at a predetermined angle by twisting the twisting shaft R, and the connection state between the both end portions of the blade and the pair of connection terminal portions is switched. Opening and closing is performed.

  Next, the disconnector operation detection mechanism 1 that is a characteristic part of the present embodiment will be described. The disconnector operation detection mechanism 1 is provided in a horizontal two-point disconnector (hereinafter referred to as disconnector A). Specifically, the disconnector operation detection mechanism 1 is configured to operate in conjunction with the operation of the twisting shaft R, and is configured to detect an operation state when the disconnector A opens and closes the electric circuit. Is.

  Further, as shown in FIG. 2, the disconnector operation detection mechanism 1 includes a limit switch 2 including a lever 21 configured to be displaceable, and a lever 21 provided in the limit switch 2 that biases and displaces the lever 21. The urging means 3 and the return means 4 for returning the lever 21 in the displaced state are provided.

  The limit switch 2 includes a lever 21 that can be displaced in a predetermined direction and a main body 22 to which the lever 21 is connected. The lever 21 is configured such that one end portion (base end portion) is connected to the main body portion 22 and can be displaced in a predetermined direction with respect to the main body portion 22. Specifically, the lever 21 is connected to the main body portion 22 so that the other end side (tip side) protrudes from the main body portion 22 and is rotatable in a predetermined direction around the connection portion with the main body portion 22. It is configured. The lever 21 is configured to be substantially linear with the main body portion 22 when not displaced, and is configured to form a predetermined angle with respect to the main body portion 22 when displaced.

  The lever 21 is configured to automatically return from the displaced state. Specifically, the connecting portion between the lever 21 and the main body 22 is provided with an elastic member such as a helical spring, and is configured so that stress is generated in the return direction when the lever 21 is displaced. Yes. In addition, the other end portion (tip portion) of the lever 21 is provided with a rotating member 23 that is rotatable in the displacement direction of the lever 21.

  On the other hand, the main body 22 is configured to be able to transmit a signal according to the displacement state of the lever 21 to the outside. Specifically, a micro switch or the like that transmits a signal according to the displacement state of the lever 21 is built in the main body 22.

  A pair of limit switches 2 is provided in the disconnector operation detection mechanism 1. Specifically, as shown in FIG. 3, the opening limit switch 2a for detecting that the disconnector A is in an open state and detecting that the disconnector A is in a closed state are detected. A closing limit switch 2b is provided.

  Further, the opening and closing limit switches 2a and 2b are arranged at predetermined positions from the twisting axis R. Specifically, the opening and closing limit switches 2a and 2b are arranged at symmetrical positions around the twisting axis R so that the levers 21a and 21b are located at a predetermined distance from the twisting axis R. It is configured. Further, the opening and closing limit switches 2a and 2b are arranged such that the levers 21a and 21b are displaced in the substantially circumferential direction around the twisting axis R and are displaced in the same direction when viewed from the twisting axis R. Has been placed.

  The urging means 3 is configured to move in conjunction with the operation of the disconnector A. Specifically, as shown in FIG. 2, the urging means 3 is provided in a connecting member 5 that moves in conjunction with the operation of the disconnector. More specifically, the biasing means 3 is connected to the twisting shaft R via the connecting member 5, and is configured to rotate together with the connecting member 5 when the twisting shaft R is twisted. The connecting member 5 is formed in a disc shape substantially perpendicular to the twisting axis R, and the twisting axis R is fixed at the center. As a result, the biasing means 3 is configured to rotate at a predetermined angle about the twisting axis R when the twisting axis R is twisted at a predetermined angle.

  Further, the biasing means 3 is disposed at a predetermined position from the twisting axis R. Specifically, the connecting member 5 is disposed so that the distance between the biasing means 3 and the twisting shaft R is substantially the same as the distance between the lever 21 and the twisting shaft R. In other words, the urging means 3 is disposed on the connecting member 5 so that the rotating member 23 is positioned on the rotating track.

  The urging means 3 includes an urging portion 31 that urges the lever 21 and a connection portion 32 that connects the urging portion 31 to the connecting member 5. A biasing surface 33 that biases the lever 21 is formed in the biasing portion 31 at a predetermined angle. Specifically, the biasing surface 33 is configured to bias the rotating member 23 and is formed to be orthogonal to the displacement direction of the lever 21. For this reason, the lever 21 can be urged toward the displacement direction, and the lever 21 can be easily displaced. The connecting portion 32 has one end portion (tip portion) connected to the biasing portion 31 and the other end portion (base end portion) connected to the connecting member 5 so as to be substantially perpendicular to the connecting member 5. Yes.

  Further, a pair of biasing means 3 is provided in the disconnector operation detection mechanism 1. Specifically, as shown in FIG. 3, an opening biasing means 3a for biasing the lever 21a of the opening limit switch 2a, and a closing biasing means 3b for biasing the lever 21b of the closing limit switch 2b; Is provided. Further, the opening and closing urging means 3a and 3b are arranged so as to urge the levers 21a and 21b in the same direction when viewed from the twisting axis R. Specifically, the opening and closing biasing means 3a and 3b are arranged on one side with a straight line connecting the pair of limit switches 2 as a boundary, and one limit switch 2 (for example, opening limit switch 2a). When the lever 21 (for example, the lever 21a) is urged, the other limit switch 2 (for example, the closing limit switch 2b) is disposed so as to be separated from the lever 21 (for example, the lever 21b). Has been.

  The return means 4 is configured to move in conjunction with the operation of the disconnector. Specifically, as shown in FIG. 2, the return means 4 is provided in the connecting member 5 together with the biasing means 3, and the biasing means 3 about the twisting axis R as the connecting member 5 rotates. At the same time, it is configured to rotate at a predetermined angle.

  The return means 4 is arranged at a predetermined position from the twisting axis R. Specifically, the return means 4 is disposed on the connecting member 5 so that the distance between the return means 4 and the twisting shaft R is substantially the same as the distance between the lever 21 and the twisting shaft R. ing. In other words, the return means 4 is arranged on the connecting member 5 so that the rotating member 23 is positioned on the rotating track.

  The return means 4 is disposed at a predetermined angle with respect to the biasing means 3 around the twisting axis R. Specifically, the return means 4 is arranged so as to form substantially the same angle as the angle of twisting of the twisting shaft R with respect to the biasing means 3 around the twisting shaft R.

  The return means 4 is arranged so that the lever 21 is positioned between the return means 4 and the biasing means 3. Specifically, between the return means 4 and the biasing means 3 in the state where the biasing means 3 biases the lever 21 and the biasing means 3 farthest from the lever 21. The lever 21 is disposed so as to be positioned. In other words, the return means 4 is disposed so that the lever 21 is positioned between the return means 4 and the biasing means 3 in the angle range (for example, 70 °) of the twist axis R. By being arranged in this way, as the urging means 3 moves away from the lever 21, the return means 3 approaches the lever 21 from the opposite side and can contact the lever 21 in a displaced state. .

  The return means 4 includes a contact portion 41 that comes into contact with the lever 21 at one end portion (tip portion), and the other end portion (base end portion) is connected to the connecting member 5. The contact portion 41 is formed to bend in a predetermined direction and is configured to contact the rotating member 23. Specifically, the contact portion 41 is formed so as to be substantially orthogonal to the return direction of the lever 21 in a state where the contact portion 41 is in contact with the rotating member 23 of the displaced lever 21. For this reason, the contact portion 41 can apply an impact toward the return direction of the lever 21.

  The return means 4 is formed using an elastic member. Specifically, an insulating resin or the like is formed in a plate shape having a predetermined width, so that it is elastically deformed by a force from the thickness direction.

  A pair of return means 4 is provided in the disconnector operation detection mechanism 1. Specifically, as shown in FIG. 3, an opening return means 4a for returning the lever 21a of the opening limit switch 2a and a closing return means 4b for returning the lever 21b of the closing limit switch 2b are provided. Yes. The pair of return means 4 is arranged on the other side with a straight line connecting the limit switches 2 as a boundary, and contacts the lever 21 (for example, the lever 21b) of one limit switch 2 (for example, the closing limit switch 2b). In the restored state, the other limit switch 2 (for example, the closing limit switch 2a) is disposed so as to be separated from the lever 21 (for example, the lever 21a). Specifically, the opening return means 4a is arranged at a position substantially symmetric with the closing biasing means 3b around the twisting axis R, and the twisting axis R of the opening biasing means 3a is arranged. They are arranged to form substantially the same angle as the twisting angle. The closing return means 4b is disposed at a position substantially symmetrical to the opening biasing means 3a around the twisting axis R, and twists the twisting axis R with respect to the closing biasing means 3b. It arrange | positions so that the angle substantially the same as an angle may be comprised.

  Next, the movement when the disconnector operation detection mechanism 1 operates will be described. 4 and 5 show the levers 21a and 21b, the opening and closing biasing means 3a and 3b, the opening and closing return means 4a when the disconnector A changes from the open state to the closed state. The position of 4b is shown. In particular, FIG. 4 shows the movement on the opening limit switch side.

  FIG. 4A and FIG. 5A show that the disconnector A has opened the electric circuit. In this state, the lever 21a of the opening limit switch 2a is biased by the biasing means 3a and is in a displaced state. Further, the opening return means 4a is in a state of being most separated from the lever 21a. On the other hand, the lever 21b of the closing limit switch 2b is in a restored state, and the closing biasing means 3b is at a position farthest from the lever 21b. Further, the closing return means 4b is positioned in the vicinity of the lever 21b without contacting the lever 21b.

  In this state, in order to switch the electric circuit from the open state to the closed state, the twisting shaft R is twisted at a predetermined angle (for example, 70 °), thereby FIG. 4 (b), (c) and FIG. 5 (b) and 5 (c), the opening biasing means 3a rotates about the twisting shaft R in the direction away from the lever 21a, and the opening return means 4a is displaced along with it. It rotates about the twisting axis R toward the lever 21a in the state. Then, the opening return means 4a comes into contact with the lever 21a that is displaced in the return direction to return it. Contrary to this, the closing biasing means 3b rotates toward the lever 21b to bias the lever 21b and displaces it, and the closing return means 4b rotates in a direction away from the lever 21b. Then stop. In this state, the limit switch 2b transmits a signal notifying that the disconnector A is in the closed state.

  The disconnector operation detection mechanism 1 having the above-described configuration is operated in conjunction with the operation of the disconnector A when the circuit is opened and closed even when the lever 21 of the limit switch 2 is fixed in a displaced state. 21 can be easily restored, and the operating state of the disconnector A can be accurately detected.

  That is, the disconnector operation detection mechanism 1 includes a return means 4 for returning the lever 21 of the limit switch 2 fixed in a displaced state, and the return means 4 is movable in conjunction with the operation of the disconnector A, As the biasing means 3 moves away from the fixed lever 21, the lever 21 approaches the fixed lever 21 and contacts in the return direction, so that the lever 21 that has been fixed in the displaced state can be removed. It can be easily restored in conjunction with the operation of the disconnector A. Specifically, since the return means 4 is moved in conjunction with the operation of the disconnector A, the fixed lever 21 can be returned together with the operation of the disconnector A when opening and closing the electric circuit. There is no need to perform return work, and power outage work such as maintenance and inspection work can be performed efficiently.

  Further, the disconnector operation detection mechanism 1 includes a pair of the limit switches 2 and is provided so that the return means 4 comes into contact with at least one lever 21 fixed in a displaced state. Even in a situation where one or both of the levers 21 are easily fixed, the lever 21 can be easily returned.

  Specifically, one of the pair of limit switches 2 is an open limit switch 21a for detecting that the electric circuit is opened by the disconnector A, and the other is the electric circuit closed by the disconnector A. In the case of the closing limit switch 21b for detecting that it is in a state, depending on whether the disconnector A is always used, for example, whether the electric circuit is always closed or always open Thus, a lever that is fixed and a lever that is not fixed are generated. Or it is not limited to either one state, and when the state in which it is always used fluctuates, sticking will occur in both levers. Therefore, the lever can be reliably returned by providing the return means 4 so as to contact the lever on which the sticking occurs or both levers.

  Moreover, the disconnector operation detection mechanism 1 can relieve an impact when the return means 4 is formed by using an elastic member so as to come into contact with the lever 21 of the limit switch 2.

<Second embodiment>
Hereinafter, a second embodiment of the present invention will be described with reference to FIG.

  First, the disconnector provided with the disconnector operation detection mechanism 10 according to the second embodiment will be briefly described. The disconnector is a V-type disconnector in which two insulators are arranged in a V shape. The V-type disconnector includes a connection terminal portion to which an overhead wire is connected at the distal ends of two insulators, and the connection terminal portions can be connected to each other by a blade. The blade is configured such that one end portion is rotatably connected to one connection terminal portion, and the other end portion is capable of contacting the other connection terminal portion.

  In addition, the blade is interlocked with a twisting shaft R that is twisted at a predetermined angle (for example, 90 °) when the electric circuit is opened and closed, and rotates around a connection portion with one connection terminal portion. It is configured. In addition, an opening / closing lever that twists the twisting shaft R when the electric circuit is opened / closed is provided at one end of the twisting shaft R. Then, by operating the open / close lever manually or automatically, the blade is rotated by twisting the twisting shaft R, and the connection state between the connection terminal portions is switched to open / close the electric circuit.

  Next, the disconnector operation detection mechanism 10 that is a characteristic part of the present embodiment will be described. The disconnector operation detection mechanism 10 is different from the first embodiment in the configuration of the limit switch 2 and the urging means 3, and accordingly the configuration of the return means 4 is also partially different. Accordingly, the following description will be made on differences from the first embodiment, and the same components will be denoted by the same reference numerals and description thereof will be omitted.

  The disconnector operation detection mechanism 10 is provided in a V-type disconnector (hereinafter referred to as disconnector B). As shown in FIG. 6, the disconnector operation detection mechanism 10 includes a limit switch 20, an urging unit 30, and a return unit 40.

  The limit switch 20 includes a lever 210 that can be displaced in a predetermined direction and a main body 220 to which the lever 210 is connected. One end (base end) of the lever 210 is connected to the main body 220 and is configured to be displaceable in a predetermined direction with respect to the main body 220. Specifically, the lever 210 is disposed along the side part of the main body part 220, and one end part (base end part) is connected to the main body part 220 so that the lever 210 can rotate around the connection part with the main body part 220. It is configured. Further, the lever 210 is configured to be substantially parallel to the main body portion 220 in the displaced state, and in the returned state, the other end portion (tip portion) is separated from the main body portion 220 and is separated from the main body portion 220. It is comprised so that a predetermined angle may be made.

  A pair of limit switches 20 is provided in the disconnector operation detection mechanism 10. Specifically, an opening limit switch 20a and a closing limit switch 20b are provided. The opening and closing limit switches 20a and 20b are arranged at a predetermined distance from the twisting axis R. Specifically, the opening and closing limit switches 20a and 20b are arranged at symmetrical positions around the twisting axis R. The levers 210a and 210b are arranged so as to be located on the twisting axis R side, and the rotating member 230 is located at a predetermined distance from the twisting axis R. Accordingly, the levers 210a and 210b are displaced in a direction away from the twisting axis R, and return toward the twisting axis R side.

  The biasing means 30 has a cam shape and is configured to rotate in conjunction with the twisting of the twisting shaft R. Specifically, the urging means 30 is formed in a plate cam shape, and is fixed so as to be orthogonal to one end of the twisting shaft R so that the center of rotation coincides with the center of the twisting shaft R. . As a result, the biasing means 30 is positioned approximately at the center of the opening and closing limit switches 20a and 20b, and is rotated at a predetermined angle in conjunction with the twisting shaft R, whereby the levers 210a, One side of 210b is urged and displaced.

  Further, the urging means 30 includes an urging surface 330 formed in an arc shape, and the urging surface 330 is formed so as to form a predetermined radius from the twisting axis R. Specifically, the distance from the twisting axis R to the urging surface 330 is formed to be substantially the same as the distance from the twisting axis R to the lever 210 in a displaced state, more specifically, to the rotating member 23. Has been.

  The return means 40 is provided so that one end portion (base end portion) thereof is fixed to the twisting shaft R together with the urging means 30 and is in a direction substantially orthogonal to the twisting shaft R. Thereby, the return means 40 is interlocked with the operation of the twisting shaft R, and the other end portion of the return means 40 is rotated at a predetermined angle around the twisting shaft R together with the biasing means 30.

  The return means 40 is configured to come into contact with the lever 210 that is fixed in a state in which the tip portion is displaced. Specifically, the rotating member 230 of the lever 210 that is fixed in a state where the tip of the return means 40 is displaced on the rotating track is positioned.

  The return means 40 includes a contact portion 410 that contacts the lever 210 at the tip. The contact portion 410 is formed to bend in a predetermined direction, and is configured to contact the rotating member 23 of the lever 210. Specifically, the contact portion 410 is formed so as to be substantially orthogonal to the return direction of the lever 210 in a state where the contact portion 410 is in contact with the rotating member 23 of the displaced lever 210. For this reason, the contact part 410 can apply an impact toward the return direction of the lever 210.

  The return means 40 is formed using an elastic member. Specifically, the return means 40 is configured such that, for example, an insulating resin or the like is formed in a plate shape having a predetermined width and is elastically deformed by a force from the thickness direction.

  Further, a pair of return means 40 is provided in the disconnector operation detection mechanism 10. Specifically, an opening return means 40a for returning the lever 210a of the opening limit switch 20a and a closing return means 40b for returning the lever 210b of the closing limit switch 20b are provided. The opening and closing return means 40a and 40b are configured to be positioned approximately symmetrically with respect to a straight line connecting the center of the biasing surface 330 and the twisting axis R.

  Next, the movement when the disconnector operation detection mechanism 10 operates will be described. 7A to 7C show the levers 210a and 210b, the opening and closing biasing means 30a and 30b, and the opening and closing when the disconnector B changes the electric circuit from the open state to the closed state. The positions of the return means 40a and 40b are shown. FIG. 7A shows that the disconnecting switch B has opened the electric circuit. In this state, the lever 210a of the opening limit switch 20a is biased by the biasing surface 330 and is in a displaced state. The return means 40a is in a state of being separated from the lever 210a, and the roller 230 is located between the urging surface 330. On the other hand, the lever 210b of the closing limit switch 20b is in a restored state, and the urging surface 330 is in a state farthest from the lever 210b. Further, the return means 40 b is in a state of being separated from the lever 21 and is located between the biasing surface 330 and the rotating member 230.

  Then, in order to switch from the open state to the closed state, the twisting shaft R is twisted at a predetermined angle (for example, 90 °), as shown in FIGS. 7B and 7C. The urging surface 330 rotates in a direction away from the lever 210a, and the return means 40a rotates toward the lever 210a fixed in a displaced state and contacts the lever 210a in the return direction to return. Let The return means 40a further turns over the lever 210a and stops. On the other hand, the urging surface 330 and the return means 40b rotate toward the lever 210b, and after the return means 40b gets over the lever 210b, the urging surface 330 urges and displaces the lever 210b and stops. . In this state, the limit switch 20b transmits a signal indicating that the disconnector B has closed the electric circuit.

  In the disconnector operation detection mechanism 10 having the above configuration, since the return means 40 is directly connected to the twisting shaft R, the force when the twisting shaft R is twisted can be directly transmitted to the return means 40, An impact can be applied to the lever 210 which is effectively fixed. Further, since the return means 40 is directly connected to the twisting shaft R, the distance between the twisting shaft R and the limit switch 220 can be narrowed, and space can be saved.

  In addition, this invention is not limited to the said embodiment, A various change is possible in the range which does not deviate from the summary of this invention.

  For example, in the first embodiment, the return means 4 and the biasing means 3 in the state where the biasing means 3 biases the lever 21 and in the state where the biasing means 3 is farthest from the lever 21. However, the present invention is not limited to this, and the return means 4 is further movable in the same direction after coming into contact with the lever 21 so as to get over the lever 21. May be configured.

  Specifically, in the first embodiment, the twist axis R is configured to be twisted at, for example, 70 °, but is configured to be twisted at a larger angle (for example, 90 °). Thus, the return means 4 may be configured to rotate over the lever 21. Alternatively, in the first embodiment, the angle formed by the return means 4 and the urging means 3 about the twisting axis R is configured to be substantially the same as the twisting angle of the twisting axis R. However, the return means 4 may be configured to rotate over the lever 21 by being configured to have a narrower angle.

  As described above, even when the return means 4 is configured to rotate over the lever 21, the return means 4 is configured using the elastic member, so that it is elastic when the lever 21 is moved over. Due to the deformation, the resistance when getting over the lever 21 can be reduced.

  In the first embodiment, a pair of biasing means 3 and return means 4 are provided, but the present invention is not limited to this. One biasing means 3 and one return means 4 are provided. You may make it prepare. Specifically, as shown in FIG. 8, when the twisting angle of the twisting shaft R is approximately 180 °, one urging means 3 ′ and one returning means 4 ′ are provided. You may arrange | position in the position symmetrical about R. With this arrangement, when one lever 21 of the pair of limit switches 2 is urged by the urging means 3 ′, the other lever 21 comes into contact with the return means 4 ′. Both levers 21 of the pair of limit switches can be easily returned.

  Moreover, in said 2nd embodiment, although the return means 40 is provided with one pair, it is not limited to this, You may make it provide the one return means 40. FIG. Specifically, as shown in FIG. 9, when the twisting angle of the twisting shaft R is approximately 180 °, the return means 40 ′ moves the twisting shaft R with respect to the central portion of the biasing surface 330. You may arrange | position in the position which makes an angle of 180 degrees to the center. With this arrangement, when one of the levers 210 of the pair of limit switches 20 is urged by the urging means 30, the other lever 210 comes into contact with the return means 40 ′. 210 can be returned by one return means 4.

  Moreover, although said 1st embodiment is provided in the horizontal two-point disconnecting switch (disconnector A), it is not limited to this, Even if it is provided in a V-type disconnector (disconnector B). Good. Moreover, although said 2nd embodiment is equipped with the V-type disconnect switch (disconnector B), it is not limited to this, Even if it is equipped with a horizontal two-point disconnect switch (disconnector A). Good.

DESCRIPTION OF SYMBOLS 1,10 ... Disconnector motion detection mechanism, 2, 2a, 2b, 20, 20a, 20b ... Limit switch, 21, 21a, 21b, 210, 210a, 210b ... Lever, 22, 22a, 22b, 220, 220a, 220b ... Body part, 23,230 ... Rotating member, 3,3a, 3b, 30,30a, 30b ... Biasing means, 31 ... Biasing part, 32 ... Connection part, 33 ... Burning surface, 4,4a, 4b, 40, 40a, 40b ... return means, 41 ... contact portion, 5 ... connecting member, A ... horizontal two-point disconnector, B ... V-type disconnector, R ... twisting shaft

Claims (4)

  A disconnector operation detection mechanism comprising a limit switch having a lever configured to be displaceable and an urging means that moves in conjunction with the operation of the disconnector that opens and closes the electric circuit and urges and displaces the lever of the limit switch. In the same way, it moves in conjunction with the operation of the disconnector, and as the biasing means moves away from the limit switch lever, it comes in contact with the limit switch lever in a state of approaching and displaced from the opposite side of the limit switch lever. A disconnector operation detection mechanism further comprising return means configured to be possible.   2. The disconnector operation detection mechanism according to claim 1, wherein a pair of the limit switches are provided so that the return means comes into contact with a lever of at least one limit switch in a displaced state.   The disconnector operation detection mechanism according to claim 1, wherein the return means is formed using an elastic member.   A disconnector operation detection mechanism comprising a limit switch having a lever configured to be displaceable and an urging means that moves in conjunction with the operation of the disconnector that opens and closes the electric circuit and urges and displaces the lever of the limit switch. The limit switch in a state in which the switch is movable in conjunction with the operation of the disconnector, and the biasing means moves away from the limit switch lever and approaches the limit switch lever from the opposite side and is displaced. The disconnector further comprising return means configured to be able to contact the lever.

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