JP2011243514A - Interlock mechanism of disconnector with ground switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a disconnector with a ground switch that prevents malfunction in both motor operation and manual operation by one interlock mechanism, facilitates resetting of an interlock, and allows a movable blade to securely occupy three positions.SOLUTION: When an interlock mechanism is reset and an operation shaft is pressed by a projection of a cam, a hole of an upper plate and a lock pin shift in position from each other to support the lock pin by the upper plate. When the interlock mechanism starts operating and the operation shaft comes out of the projection of the cam, the hole of the upper plate is aligned with the position of the lock pin to make the lock pin pass through the hole of the upper plate, and the hole of a lower plate and the lock pin shift in position from each other to support the lock pin by the lower plate. When the interlock mechanism locks and the operation shaft is pressed by a next projection of the cam, the hole of the lower plate is aligned with the position of the lock pin to make the lock pin pass through the hole of the lower plate, and the lock pin engages with a lock pin receiver to stop a gear train from rotating.

Description

  The present invention relates to an interlock mechanism of a disconnecting switch with a ground switch.

  The disconnecting switch with earthing switch is composed of the disconnecting switch and the earthing switch in one, and the three operations of closing the main circuit, opening the main circuit, and grounding are rotated by one movable blade. It can be carried out.

  The disconnecting switch with a ground switch is usually operated electrically and manually. The movable blade is rotated through a gear mechanism or the like by a geared motor in the case of electric operation or by a manual handle in the case of manual operation, and the main circuit is closed, the main circuit is opened, and the ground is switched.

  In the operation of a disconnecting switch with a grounding switch, it has been a challenge to reliably switch between three positions: main circuit closing, main circuit opening, and grounding. As an example to solve this problem, there is a disconnector with a ground switch having an interlock mechanism shown in Patent Document 1.

  As shown in FIG. 14, this interlock mechanism is mainly used when the movable blade occupies three positions, and a slide lock pin 70 that prevents the manual handle from being inserted and removed when the movable blade is not in the third position. It is composed of a rotation lock pin 71 that stops the rotation of the manual handle by being inserted into the lock hole of the manual handle. In addition, the structure is such that the slide lock pin 70 and the rotation lock pin 71 are opened only when the movable blade occupies three positions, thereby preventing the manual handle 73 from being attached and detached at positions other than the three positions.

JP-A-9-180594

  However, the disconnector with a ground switch shown in Patent Document 1 (hereinafter referred to as a conventional example) has the following problems. In other words, in the conventional example, it was possible to prevent malfunction by using the above-described interlock mechanism in manual operation, but in the case of electric operation, it was necessary to provide an interlock mechanism separately. It was. Therefore, there is a problem that the configuration is complicated and the number of parts increases.

  Further, the conventional example has a problem that it takes time to reset the interlock. As shown in FIG. 14, in the conventional example, in order to reset the interlock mechanism, the manual handle 73 is rotated two or three times with the handle 72 raised, and the cam 74 does not push the roller 75. After the lock pin 70 for rotation and the lock pin 71 for rotation were made to be restrained by the restraining member 76, a series of operations of releasing the handle 72 was necessary. If the handle 72 is released before the sliding lock pin 70 and the rotation lock pin 71 are restrained by the restraining member 76 at this time, the rotation lock pin 71 and the lock hole 73a of the manual handle are engaged with each other, and the movable blade is moved. There was a risk of malfunction that would stop the operation of the disconnect switch with grounding switch in a state that does not occupy three positions.

  In view of the above problems, the present invention prevents malfunction during both electric operation and manual operation with one interlock mechanism, facilitates resetting of the interlock, and ensures that the movable blade occupies three positions. The purpose of the present invention is to provide a disconnect switch with a grounding switch.

  In order to solve the above-described problem, the disconnector with a ground switch according to the present invention rotates the movable blade by transmitting the rotation of the motor or the rotation of the manual operation handle to the movable blade through the gear train. The present invention relates to a disconnecting switch with a grounding switch for controlling rotation of a motor or rotation of the manual operation handle by an interlock mechanism when occupying three positions of closing and opening of the disconnecting switch and closing of a grounding switch. The interlock mechanism is arranged on a rotation shaft of one gear constituting the gear train, and rotates in conjunction with the gear train, and extends from the lock pin receptacle to the rotation shaft. A manual operation handle, a lock pin that is urged toward the lock pin receiver and fitted with the lock pin receiver, and a cam that rotates in conjunction with the gear train and has three convex portions corresponding to three positions. And an operation shaft that is displaced in the axial direction in conjunction with the convex portion, one end is connected to the operation shaft, and the other end is disposed between the lock pin receiver and the lock pin. It is composed of an upper plate and a lower plate that move in parallel and have holes through which the lock pins can pass at positions that face the lock pins. When the interlock mechanism is reset and the operating shaft is pushed by the convex portion of the cam, the upper plate supports the lock pin by shifting the positions of the hole of the upper plate and the lock pin. Next, when the interlock mechanism starts to operate and the cam rotates so that the operating shaft is disengaged from the convex portion of the cam, the hole on the upper plate and the position of the lock pin coincide with each other to raise the lock pin. The lower plate supports the lock pin by passing through the hole of the plate and shifting the position of the hole of the lower plate and the lock pin. Finally, when the interlock mechanism is locked and the operating shaft is pushed by the next convex part of the cam, the lock pin passes through the hole in the lower plate by matching the position of the hole in the lower plate with the position of the lock pin. Further, the rotation of the gear train is stopped by fitting the lock pin with the lock pin receiver.

  In the above disconnecting switch with earthing switch, in order to move the movable blade from any of the three positions to the other three positions, the lock pin is lifted vertically upward and the What is necessary is just to release the lock. Further, by using a motor in the case of an electric operation and a manual operation handle in the case of a manual operation, the gear train can be rotated to operate the disconnecting switch with a ground switch.

  In the above interlock mechanism, when the interlock mechanism is reset, the operation shaft is pushed by the convex portion of the cam, and the upper plate supports the lock pin by shifting the position of the hole of the upper plate and the lock pin (hereinafter, At the time of resetting), the movable blade still occupies one of the three positions (close switch open and open and ground switch closed).

  One end of an upper plate and a lower plate is connected to the operation shaft, and a pin for engaging with the upper plate and the lower plate is attached so as to penetrate the operation shaft. Further, the upper plate and the lower plate are biased so as to face each other toward the pin. The operation shaft is configured to be biased toward the cam, and is configured to be displaced in conjunction with the unevenness of the rotating cam.

  At the time of resetting, the upper plate and the lower plate are urged to face each other toward the pin provided on the operation shaft, and are in a state of being engaged with the pin, respectively. In this state, the upper plate supports the lock pin by shifting the positions of the hole of the upper plate and the lock pin biased toward the hole.

  In the above interlock mechanism, when the interlock mechanism starts to operate and the cam rotates, the operation shaft is disengaged from the convex portion of the cam, and the position of the hole of the upper plate and the position of the lock pin coincide with each other. When the lower plate supports the lock pin by shifting the position of the hole of the lower plate and the lock pin (hereinafter referred to as operation), the movable blade is moved from the three positions at the time of reset. Are separated, but are still in the previous state of occupying the next three positions.

  When moving from reset to operation, the operating shaft moves from the convex portion of the cam to the concave portion. The upper plate is locked to the pin while being urged toward the pin provided on the operation shaft, similarly to the reset. Therefore, the upper plate moves in the same direction as the operation shaft by the amount that the operation shaft is displaced from the convex portion of the cam to the concave portion. The lock pin is configured to pass through the hole in the upper plate in the state after the movement. On the other hand, since the lower plate is also urged toward the pin and is locked to the pin, the operation shaft moves in the same direction as the operation shaft by the amount displaced from the convex portion of the cam to the concave portion. In this state after the movement, the lower plate supports the lock pin by shifting the positions of the hole of the lower plate and the lock pin.

  In the above interlock mechanism, the interlock mechanism is locked, the operation shaft is pushed by the next convex portion of the cam, and the position of the hole of the lower plate and the position of the lock pin coincides so that the lock pin passes through the hole of the lower plate. Further, when the rotation of the gear train is stopped by engaging the lock pin with the lock pin receiver (hereinafter, referred to as locking), the movable blade completes the transition to the next three positions.

  When moving from operation to locking, the lower plate is urged toward the pin of the operation shaft and locked to the pin, so the lower plate is also moved to the operation shaft by the amount that the operation shaft is displaced from the concave portion of the cam to the convex portion. Move in the same direction as. In this state after the movement, the lock pin passes through the hole in the lower plate by matching the position of the hole in the lower plate with the position of the lock pin.

  Further, at the timing when the lock pin passes through the hole in the lower plate, the recess for receiving the lock pin of the lock pin receiver is opposed to the hole in the lower plate, and the lock pin that has passed through the hole in the lower plate is received. By doing so, the lock pin is fitted with the lock pin receiver and the movable blade occupies three positions (that is, the operation shaft is on the convex portion of the cam), the interlock is applied, and the switch with grounding switch is Stop operation.

  In the disconnector with a ground switch according to the present invention, a manual operation handle is disposed on a rotation shaft of a lock pin receiver that rotates in conjunction with a gear train that transmits the movement of a motor. With this configuration, a common interlock mechanism can be used for both electric operation and manual operation. For this reason, it is not necessary to provide separate interlock mechanisms for electric operation and manual operation, and a simple configuration can be achieved.

  The interlock mechanism is configured such that the position of the hole of the upper plate and the lock pin are displaced when the operation shaft is pushed by the convex portion of the cam. That is, when the operation shaft is pushed by the convex portion of the cam, the upper plate can support the lock pin. Thereby, when the operating shaft is pushed by the convex part of the cam and the movable blade occupies three positions (that is, when locked), the lock pin is supported by the upper plate only by pulling the lock pin vertically upward, Interlock can be released. This makes it possible to easily reset the interlock mechanism.

  Furthermore, in the interlock mechanism, the upper plate supports the lock pin in the reset state, and the lower plate supports the lock pin in the operating state. There is no. Only when locked, the lock pin passes through the hole in the lower plate and fits into the recess of the lock pin receiver, and the interlock is applied. By adopting a configuration in which the movable blade occupies three positions only at the time of locking, it becomes possible to realize a disconnecting switch with a grounding switch in which the operation is reliably locked only when the movable blade occupies three positions.

FIG. 1 is a schematic side view of a disconnecting switch with a ground switch having an interlock mechanism according to the present invention. FIG. 2 is a schematic plan view of a disconnecting switch with a ground switch having an interlock mechanism according to the present invention. FIG. 3 is a schematic front view showing the configuration of the interlock mechanism, the motor, and the gear train interlocking therewith according to the present invention. FIG. 4 is a diagram showing a configuration in which a planetary gear mechanism as a speed reduction mechanism is connected to a motor. FIG. 5 is a perspective view of a planetary gear device with a roller attached. FIG. 6 is a diagram showing a configuration of a gear train for transmitting the rotation of the motor to the cam. FIG. 7 is a front view of the interlock mechanism according to the present invention, and shows a state at the time of resetting. FIG. 8 is a front view of the interlock mechanism according to the present invention, and shows a state during operation. FIG. 9 is a front view of the interlock mechanism according to the present invention, and shows a state when locked. FIG. 10 is a diagram showing the configuration of the position detection mechanism of the interlock mechanism according to the present invention. FIG. 11 is a plan view of the interlock mechanism according to the present invention. FIG. 12 is a side view and a plan view of a cam constituting the interlock mechanism. FIG. 13 is a diagram showing the positional relationship between the cam and the operating shaft at each of the three positions. FIG. 14 is a block diagram of an interlock mechanism according to a conventional disconnecting switch with a ground switch.

  Hereinafter, an interlock mechanism of a disconnecting switch with a ground switch according to the present invention will be described based on the drawings shown as examples. In addition, the following Example is an example of the disconnecting switch with a ground switch according to the present invention, and can be implemented by appropriately changing the shape and configuration of each part without departing from the gist of the present invention.

  As shown in FIGS. 1 and 2, the disconnector with a ground switch according to the present invention includes a motor 1, a gear A, a gear B, a gear C, a gear D connected to the motor 1, and a rotation extending from the gear D onto its rotation axis. A shaft 2, a blade side worm gear 5 that converts the rotation of the rotating shaft 2 into a reciprocating motion, and an insulating rod 7 that connects the blade side worm gear 5 and the movable blade 6 are roughly configured. The movable blade 6 is supported via a lever 9.

  Further, as shown in FIG. 2, a lock pin receiver 42 constituting the interlock mechanism according to the present invention is fixed with the gear C and the rotation shaft thereof being the same. A manual operation handle 8 is connected on the shaft of the lock pin receiver 42. A rotating shaft 2 that transmits the rotation of the gear D extends on the rotating shaft of the gear D. As shown in FIG. 6, a cam 30 is disposed on the rotary shaft 2 via a cam side worm gear 33. Further, as shown in FIGS. 7 to 9, the cam 30 is arranged so that the upper end portion thereof is in contact with the roller B attached to the tip of the operation shaft 44.

  In FIG. 3, a planetary gear mechanism 20 shown in FIG. The details of the planetary gear device 21 constituting the planetary gear mechanism 20 are shown in FIG. The planetary gear device 21 includes a planetary gear 23 that is rotatably connected to a sun gear 22 as a center, an internal gear 24 that is rotatably connected to the outer periphery thereof, and a carrier 25. The carrier 25 is connected to the planetary gear 23 and interlocks with the planetary gear 23, but is not interlocked with the internal gear 24.

  One of the plurality of planetary gear devices 21 constituting the planetary gear mechanism 20 is provided with a roller on the outer peripheral surface of its internal gear 24. In the present embodiment, as shown in FIG. 5, two rollers A are attached to each other at an interval of 180 degrees in the circumferential direction. The roller A is preferably provided on the side surface of the internal gear 24 so as to be engaged with the stopper 15 when the vertically moving stopper 15 shown in FIG. 3 moves downward. What is necessary is just to determine the number of the planetary gear apparatuses 21 which comprise the planetary gear mechanism 20 according to a required reduction ratio. Further, the planetary gear mechanism 20 is connected to the gear A as shown in FIG. 4, and transmits the rotational motion from the motor to the gear train composed of the gears A to D shown in FIG.

  As shown in FIG. 3, the stopper support plate 16 that holds the stopper 15 is installed above the planetary gear unit 21. Both ends of the stopper support plate 16 are bent in a U-shape, and holes (not shown) are provided at both ends. The stopper 15 passes through the holes at both ends, and is biased toward the planetary gear device 21 by a return spring D attached to the upper end of the stopper support plate 16. The spring force of the return spring D is sufficient to stop the rotation of the planetary gear device 21 by stopping the stopper 15 with the roller A when the stopper 15 is biased downward, and the stopper 15 is moved upward. It is necessary that the stopper 15 is of such a degree that it can be surely released from the engagement with the roller A when it is urged.

  As shown in FIG. 3, the stopper 15 is connected to the lock pin 10 via a link 14. The link 14 is rotatably held around the center by a fixed shaft 18. One end of the fixed shaft 18 is fixed to the mounting plate A as shown in FIG. As a result, when the lock pin 10 is pulled up, the stopper 15 moves vertically downward, and the rotation of the planetary gear device 21 is stopped by engaging with the roller A. As shown in FIG. 3, the lock pin 10 can be pulled up electrically by a solenoid 12. Further, as shown in FIGS. 2 and 3, the lock pin 10 is connected to a manual handle 13 and can be pulled up manually.

  Next, FIG. 6 shows an example of a gear train for transmitting the rotation of the gear A to the cam 30. The gear A and the gear D are rotatably connected via a gear B and a gear C, which are intermediate gears. The rotation of the motor 1 is transmitted from the gear A to the gear D through the gear B and the gear C. A worm 31 is provided on the rotation shaft of the gear D. A worm wheel 32 that meshes with the worm 31 is provided with a cam 30 having the same rotational axis. The cam 30 transmits the rotational motion decelerated from the motor 1 to an interlock mechanism that will be described later.

  Hereinafter, an operation for transmitting the rotation of the motor 1 to the movable blade 6 will be described. The motor 1 is rotated to operate the three position disconnector. Next, the lock pin 10 is pulled up by the solenoid 12 or the manual handle 13 shown in FIG. By pulling up the lock pin 10, the stopper 15 moves vertically downward as described above. As a result, the roller A is locked to the stopper 15, and the internal gear 24 provided with the roller A is locked so as not to rotate. When the internal gear 24 is locked, the rotation of the motor 1 is transmitted to the gear A through the sun gear 22, the planetary gear 23, and the carrier 25 shown in FIG.

  The rotation of the gear A is transmitted to the blade-side worm gear 5 including the worm 3 and the worm wheel 4 through the gear B, the gear C, and the gear D shown in FIG. . The rotation of the gear A is rotated 90 degrees by the blade side worm gear 5, transmitted to the insulating rod 7 while being decelerated, and finally transmitted to the movable blade 6.

  On the other hand, the rotation of the motor 1 is transmitted to a cam-side worm gear 33 including a worm 31 and a worm wheel 32 via a gear A, a gear B, a gear C, and a gear D as shown in FIG. The rotational movement of the gear train is rotated 90 degrees by the cam side worm gear 33, decelerated, and transmitted to the cam 30. Thereafter, the rotation of the cam 30 is transmitted to an interlock mechanism 60 shown in FIGS. 7 to 9 described below.

  Hereinafter, the configuration of the interlock mechanism 60 of the present invention will be described. The interlock mechanism 60 shown in FIGS. 7 to 9 is schematically composed of a lock pin 10, a lock pin receiver 42, a cam 30, a position detection mechanism 61 shown in detail in FIG. 10, and a manual operation handle 8 shown in FIG. Composed.

  As shown in FIG. 12, the cam 30 has a disk shape, and is provided with three convex portions in a range of approximately 120 degrees in the circumferential direction near the outer periphery thereof. As will be described later, these three convex portions respectively correspond to closing and opening of the disconnect switch and closing of the ground switch. As shown in FIG. 7, an operation shaft 44 extending along a direction parallel to the rotation axis of the cam 30 is provided at the upper end portion of the cam 30. A roller B is connected to the tip of the operation shaft 44. The roller B reciprocates between the three convex portions provided on the cam 30 according to the rotation / reverse motion of the motor. As will be described later, the operation shaft 44 moves to the left and right as the roller B reciprocates on the unevenness of the cam 30.

  Hereinafter, the configuration of the position detection mechanism 61 will be described with reference to FIG. The operation shaft support plate 46 has a U-shape in which left and right ends are bent. Holes 46a and 46b are provided at both ends. The operation shaft 44 is attached so as to slide through the holes 46a and 46b. One end of the upper plate 40 and the lower plate 41 is attached to the inner side of the operation shaft support plate 46 via the operation shaft 44. Holes 40a, 41a, and 41b are provided at one ends of the upper plate 40 and the lower plate 41, respectively, and the operation shaft 44 is configured to slide through these holes. Further, a notch 45 is provided in the vicinity of a right angle formed on the lower plate 41 in an ellipse shape. The upper plate 40 is arranged so as to overlap the lower plate 41 through the notch 45. Further, instead of arranging the upper plate 40 and the lower plate 41 in an overlapping manner, the upper plate 40 and the lower plate 41 may be arranged in parallel while maintaining a predetermined distance therebetween. The operation shaft support plate 46 is fixed to the mounting plate A shown in FIG.

  When the upper plate 40 is disposed so as to overlap the lower plate 41, the upper plate 40 preferably has a thickness of about 1.5 mm. As shown in FIG. 8, when the lock pin falls in the hole 40b of the upper plate of the interlock mechanism and the lock pin 10 is supported on the lower plate 41, vibration is applied to the interlock mechanism 60. 10 may jump out of the hole 40b in the upper plate. By setting the thickness of the upper plate 40 to about 1.5 mm, it is possible to reduce the possibility that the lock pin 10 jumps out of the hole 40b of the upper plate even if vibration is applied to the interlock mechanism 60.

  As shown in FIG. 10, a pin 47 is driven into the operation shaft 44, and one end of the upper plate 40 and the lower plate 41 is arranged on both sides thereof. A return spring A and a return spring B having the same spring force are attached to both inner sides of the operation shaft support plate 46. The return spring A and the return spring B are arranged to push the upper plate 40 and the lower plate 41 toward the pin 47, respectively. The pin 47 penetrates the operation shaft 44 and protrudes from both sides, and pushes the upper plate 40 and the lower plate 41 left and right according to the movement of the operation shaft. In FIG. 7, when the operation shaft 44 moves to the left in the drawing, the pin 47 pushes the upper plate 40 to the left. At this time, the lower plate 41 also moves to the left by the spring force of the return spring B. Further, when the operation shaft 44 moves to the right side of the page, the pin 47 pushes the lower plate 41 to the right. At this time, the upper plate 40 also moves to the right by the spring force of the return spring A.

  As shown in FIGS. 7 to 9, the other ends of the upper plate 40 and the lower plate 41 are disposed between the lock pin support plate 51 and the lock pin receiver 42. As shown in FIG. 10, a hole 40b and a hole 41c through which the lock pin 10 can pass are provided at the other ends of the upper plate 40 and the lower plate 41, respectively. Further, as shown in FIG. 7, the lock pin 10 is disposed so as to pass through holes 51 a and 51 b provided in a U-shaped lock pin support plate 51 whose left and right ends are bent. One end of a return spring C is fixed inside the upper end of the lock pin support plate 51, and the other end of the return spring C is fixed to a spring receiver 52 provided in the middle of the lock pin 10. With this configuration, the lock pin 10 is urged vertically downward toward the lock pin receiver 42. The lock pin support plate 51 is fixed to the mounting plate B shown in FIG.

  Hereinafter, the operation of the interlock mechanism 60 will be described. FIG. 7 shows a state when the interlock mechanism is reset. That is, the roller B which comprises the interlock mechanism 60 has shown the state currently riding on the convex part of the cam 30. FIG. The operating shaft 44 is in a state where the return spring B is compressed while being moved from the right side of the drawing. As described above, since the return spring A and the return spring B have the same spring force, a force that urges the operation shaft 44 in the left direction in the drawing is applied by the spring force of the return spring B. The upper plate 40 urged by the return spring A and locked to the pin 47 is stationary at a position where the edge portion of the hole 40b provided in the upper plate 40 is slightly shifted from the side peripheral portion of the lock pin 10 (about 1.5 mm). To do. Here, the lock pin 10 biased by the return spring C is supported by the upper plate 40.

  Next, the movement during the operation shown in FIG. 8 will be described. In the state of FIG. 7, the operation shaft 44 is biased leftward by the spring force of the return spring B. When the cam 30 starts rotating, the roller B connected to the operation shaft 44 moves from the convex portion of the cam 30 to the concave portion according to the rotation of the cam 30 as shown in FIG. In conjunction with this movement, the operation shaft 44 moves to the left. The upper plate 40 is also moved leftward by being pushed by a pin 47 attached to the operation shaft 44. When the upper plate 40 moves about 1.5 mm in the left direction, the lock pin 10 biased vertically downward from the return spring C falls into the hole 40 b of the upper plate 40. In this state, the lower plate 41 also moves to the right side in conjunction with the operation shaft 44, so that the edge portion of the hole 41c of the lower plate moves to a position slightly deviated (about 1.5 mm) from the side peripheral portion of the lock pin 10. . Thereby, the lock pin 10 is supported by the lower plate 41.

  Next, the movement that occurs at the time of locking shown in FIG. 9 will be described. When the cam 30 further rotates from the state of FIG. 8, as shown in FIG. 9, the roller B rides on the convex portion of the cam 30, and the operation shaft 44 moves in the right direction of the paper in conjunction with this. The upper plate 40 does not move because it is locked to the lock pin 10, but the lower plate 41 moves to the right in the drawing by being pushed by the pin 47. When the position of the hole 41 c of the lock pin 10 and the lower plate 41 is matched, the lock pin 10 penetrates the lower plate 41. At this timing, the lock pin receiver 42 is configured such that the lock hole 43 faces vertically upward, and the lock pin 10 that has passed through the hole 41 c of the lower plate is fitted into the lock hole 43.

  At this time, the link 14 connected to the lock pin 10 shown in FIG. 3 rotates counterclockwise, and the stopper 15 connected to the link 14 is lifted vertically upward. Thereby, the engagement between the stopper 15 and the roller A is released. Since the roller A is unlocked and the internal gear 24 shown in FIG. 5 is rotatable, the rotation of the motor 1 is not transmitted to the gear A as described above. As a result, when the roller B rides on the convex portion of the cam 30, that is, when the movable blade 6 occupies three positions, the drive of the motor 1 is not transmitted to the gear train, and the interlock can be reliably performed. Become.

  When starting the next operation, the lock pin 10 is pulled up from the locked state shown in FIG. Then, the upper plate 40 is urged to the right in the drawing by the spring force of the return spring A, and moves to the right until the upper plate 40 is locked by the pin 47 as shown in FIG. At this time, the lock pin 10 is supported by the upper plate 40 by moving the edge portion of the hole 40b of the upper plate to a position slightly shifted (about 1.5 mm) from the side peripheral portion of the lock pin 10, and the state at the time of resetting Become.

  The return spring C that urges the lock pin 10 vertically downward has a spring force that allows the lock pin 10 to be instantaneously dropped into the lock hole 43 when the lock pin 10 is disengaged from the lower plate 41. Although it is preferable, it is necessary to have a spring force that does not hinder horizontal sliding of the upper plate 40 and the lower plate 41. In FIG. 8, the return spring C urges the lock pin 10 with such a spring force that the lock pin 10 does not jump out of the hole 40b of the upper plate even when the interlock mechanism 60 receives a slight impact. desirable.

  Finally, the movement of the entire apparatus will be supplementarily described focusing on the relationship between the rotation of the cam 30 and the position of the lock pin 10 and the position of the movable blade 6. FIG. 13 is a diagram showing the positional relationship between the cam 30 and the operating shaft 44 at each of the three positions (closer / opener of the disconnector and closing of the ground switch). Three convex portions of the cam 30 correspond to the three positions, respectively, and an arbitrary convex portion to an adjacent convex portion of the cam 30 correspond to one operation of the movable blade 6.

  The state in which the operating shaft 44 shown in FIG. 13A is riding on the central convex portion of the cam 30 is referred to as opening of the disconnector. In order to operate the disconnecting switch with ground switch, first, the lock pin 10 is pulled up to the reset state shown in FIG. As a result, as described above, the rotation of the motor 1 is transmitted to the movable blade 6 through the insulating rod 7 and the like (see FIGS. 1 and 2).

  On the other hand, as the rotation of the motor 1 is transmitted to the cam 30, the roller B falls from the convex portion to the concave portion as shown in FIG. Then, the operation state shown in FIG. 8 is entered, and the operation shaft 44, the upper plate 40, and the lower plate 41 move to the left in the drawing. As a result, the lock pin falls into the hole 40b of the upper plate and is supported on the upper surface of the lower plate 41.

  Further, the cam 30 rotates, and the roller B rides on the convex portion as shown in FIG. Then, the operation shaft 44 and the lower plate 41 move in the right direction on the paper surface. As a result, as shown in the locked state in FIG. 9, the lock pin 10 passes through the hole 41 c of the lower plate and further fits into the lock hole 43 of the lock pin receiver 42.

  When the lock pin 10 is fitted into the lock hole 43, the stopper 15 shown in FIG. 3 moves vertically upward, and the engagement between the stopper 15 and the roller A is released. Accordingly, as described above, the rotation of the motor 1 is not transmitted to the gear A, and therefore the rotation of the motor 1 is not transmitted to the movable blade 6. Thus, the movement of the movable blade 6 is stopped, so that the grounding state can be reliably realized.

  In this embodiment, the disk-shaped cam shown in FIG. 12 is used. However, the shape of the cam is not limited to this, and any cam having three protrusions for corresponding to three positions can be used. It may be of any shape.

  In the above-described embodiment, the transition from opening of the disconnect switch to closing of the ground switch has been described. However, the transition from closing of the disconnect switch to opening of the disconnect switch can be performed in the same manner. Further, in order to shift from closing the earthing switch to opening the disconnecting switch and from opening the disconnecting switch to closing the disconnecting switch, the motor 1 can be reversed and the cam 30 can be reversed to perform the same operation. Become.

  As described above, in the disconnector with a ground switch according to the present embodiment, as shown in FIG. 11, the manual operation handle is arranged on the rotation shaft of the lock pin receiver that rotates in conjunction with the gear train that transmits the movement of the motor. Therefore, a common interlock mechanism can be used for both electric operation and manual operation. For this reason, it is not necessary to provide separate interlock mechanisms for electric operation and manual operation, and a simple configuration can be achieved.

  Further, in the disconnector with grounding switch of the present embodiment, the upper plate 40 is urged to the right by the spring force of the return spring A when locked as shown in FIG. Therefore, by simply pulling the lock pin vertically upward in the locked state, the return spring A is fully extended, and the position of the edge portion of the hole 40b of the upper plate and the side peripheral portion of the lock pin 10 is slightly shifted. Thereby, as shown in FIG. 7, the upper plate 40 can support the lock pin. That is, the interlock mechanism can be easily reset as compared with the conventional example.

  Further, in the interlock mechanism of this embodiment, the upper plate 40 supports the lock pin 10 at the time of reset shown in FIG. 7, and the lower plate 41 supports the lock pin 10 at the time of operation shown in FIG. Only at that time, the lock pin 10 passes through the upper plate 40 and the lower plate 41 and fits into the lock hole 43. As a result, it is possible to realize a disconnecting switch with a ground switch in which the operation is reliably locked only when the movable blade 6 occupies three positions.

1 Motor 6 Movable blade 8 Manual operation handle 10 Lock pin
15 Stopper 30 Cam 40 Upper plate 41 Lower plate 42 Lock pin receiver 43 Lock hole 44 Operation shaft 46 Operation shaft support plate 47 Pin 51 Lock pin support plate 52 Spring receiver 60 Interlock mechanism

Claims (1)

The movable blade is rotated by transmitting the rotation of the motor or the rotation of the manual operation handle to the movable blade through a gear train, and the movable blade occupies three positions of closing and opening of the disconnect switch and closing of the ground switch. Sometimes in a disconnector with a ground switch that controls rotation of the motor or rotation of the manual operation handle by an interlock mechanism,
The interlock mechanism is
A lock pin receiver which is arranged on a rotation shaft of one gear constituting the gear train and rotates in conjunction with the gear train;
A manual operation handle arranged extending from the lock pin receiver on the rotation shaft;
A lock pin that is biased toward the lock pin receiver and engages with the lock pin receiver;
A cam that rotates in conjunction with the gear train and has three convex portions corresponding to the three positions;
An operating shaft that is displaced in the axial direction in conjunction with the convex portion;
One end is connected to the operation shaft, the other end is disposed between the lock pin receiver and the lock pin, and is moved in parallel by displacement of the operation shaft so that the lock pin can pass through a position facing the lock pin. Consisting of an upper plate and a lower plate,
When the interlock mechanism is reset and the operation shaft is pushed by the convex portion of the cam, the upper plate supports the lock pin by shifting the position of the hole of the upper plate and the lock pin,
When the interlock mechanism starts to operate and the operation shaft is disengaged from the convex portion of the cam, the hole of the upper plate and the position of the lock pin coincide with each other so that the lock pin becomes the hole of the upper plate. And the lower plate supports the lock pin by shifting the position of the hole of the lower plate and the lock pin,
When the interlock mechanism is locked and the operation shaft is pushed by the next convex part of the cam, the hole of the lower plate and the position of the lock pin coincide with each other so that the lock pin becomes the hole of the lower plate. A disconnecting switch with a grounding switch, wherein the rotation of the gear train is stopped when the lock pin is engaged with the lock pin receiver.

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