JPH09282968A - Locking device for opening and closing operating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To securely close a circuit-breaker when a locking device is positioned at the normal position, and to securely hinder the closing operation of the circuit-breaker when the locking device is positioned at a position except for the normal position. SOLUTION: This locking device is provided with an upper slider 9 and a lower slider 10, which are respectively screwed with an upper operating shaft 3 for a disconnector and a lower operating shaft 5 for grounding switch formed in parallel with each other, a connecting device connected to a central part of a connecting lever 11, of which both ends are connected to both sliders 9, 10, and a locking lever 31 for positioning an iron core 29 of a disconnecting solenoid 28 for circuit-breaker at the locking position and the releasing position, and two wires 57, of which ends move the locking lever 31 so as to position the iron core 29 at the releasing position when both the sliders 9, 10 are positioned at the end of both the operating shafts 3, 5 and of which end of one slider side moves the locking lever 31 in the opposite direction so as to hold the iron core 29 at the locking position when any one of the sliders is positioned at a position except for the ends of both the operating shafts 3, 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention combines a disconnecting switch and a grounding switch to perform a series of opening / closing operations in three states: disconnecting switch on / off and grounding switch on / off, and a disconnecting switch and a grounding switch. The present invention relates to a locking device for an operating device for a switchgear, which blocks the closing operation of a circuit breaker except in the three states of turning on and off.

[0002]

5A, B, C and FIG. 5 showing a schematic view, a left side view of a part, and a rear view of another part of a conventional locking device for a switch operating device. This will be described with reference to FIGS. 6A, 6B and 6C showing front views of FIG.

In these figures, reference numerals 1 and 2 denote left and right side plates provided on the left and right sides, and 3 denotes an upper operating shaft for a disconnector, which is pierced above the side plates 1 and 2 and is rotatable. And a left-hand screw 4 is formed. Reference numeral 5 denotes a lower operation shaft for the grounding switch, which is pierced in the lower portions of the side plates 1 and 2 and is rotatably supported and has a right-hand screw 6 formed therein. 7 is an upper motor whose rotary shaft is connected to the end of the upper operating shaft 3 and rotates the upper operating shaft 3, and 8 is a lower motor which is connected to the end of the lower operating shaft 5 and rotates the lower operating shaft 5. Motors 9 and 10 are an upper slider and a lower slider screwed to the upper operation shaft 3 and the lower operation shaft 5, respectively.

Reference numeral 11 denotes a connecting lever, the upper end of which is connected to the upper pin 12 of the upper slider 9, and the lower pin 13 of the lower slider 10 is loosely inserted in the elongated hole of the lower end. Reference numeral 14 is a connecting device, one end of which is a center pin 15 at the center of the connecting lever 11.
The other end is connected to the disconnecting switch 19 of the gas insulated switchgear 18 and the operating lever 21 of the ground switch 20 via the lever 16 and the link mechanism part 17.

Reference numeral 22 is a circuit breaker operating device, and 23 is an operating device 22.
5B is a horizontal operation shaft rotatably mounted on the circuit breaker and connected to the opening / closing part of the circuit breaker, and 24 is a vertical hacker whose central portion is fixed to the operation shaft 23. It is energized. Reference numeral 25 is a latch shaft, 26 is a contact plate whose base is fixed to the latch shaft 25, and 27 is a latch body fixed to the front end of the contact plate 26. The latch body 27 is detachable from the lower end of the hacker 24. It is freely locked and the latch body 27 is biased in the clockwise direction. Reference numeral 28 denotes a shutoff solenoid provided below the contact plate 26.
The iron core 29 is moved upward by the excitation of, and the operating rod 30 fixed to the iron core 29 pushes up the contact plate 26.

Reference numeral 31 denotes an L-shaped locking lever rotatably supported below the solenoid 28, one end of which is the iron core 2
9 abuts. 32 is a sleeve whose both ends are respectively fixed to two fixing plates 33, 34 is a wire inserted through the sleeve 32, one end of which penetrates one fixing plate 33, and the other end of the locking lever 31 Are linked to.

Reference numeral 35 is a rotary plate, 36 is a cylindrical body fixed to the central portion of the lower surface of the rotary plate 35, and 37 is a fixed pin inserted into the cylindrical body 36. The rotary plate 35 is rotatably supported. . Reference numeral 38 denotes a bending plate formed by bending downward at one end of the rotating plate 35, and 39 denotes three recesses formed at equal intervals on the lower edge of the rotating plate 35. The other end of the wire 34 is connected to the upper surface of the other end, and the center pin 15 that interlocks with the connecting lever 11 is located in the recess 39. Reference numeral 40 denotes a spring provided at one end of the lock lever 31, and urges the lock lever 31 in the counterclockwise rotation direction.

Next, the operation will be described. FIG. 6A shows a state in which the disconnector 19 is turned on, and the upper slider 9 and the lower slider 1 are shown.
0 is located at the left end of the upper operation shaft 3 and the lower operation shaft 5, and the center pin 15 is located at the left position 41. At this time, as shown by the solid line in FIG. 5C, the center pin 15 is located in the recess 39 on the right side of the bending plate 38 of the rotating plate 35, the tension does not move on the wire 34, and the locking lever 31 rotates left. , The iron core 29 of the shutoff solenoid 28 is moved downward to the release position, and the hacker 2
4 is disengaged from the latch body 27 of the latch shaft 25, and the circuit breaker is ready to be closed.

Next, from the state of FIG. 6A, the upper motor 7 operates to rotate the upper operating shaft 3, the upper slider 9 moves to the right, and the connecting lever 11 moves the lower pin, as shown in FIG. 6B. 13 rotates right about 13, the upper position 42 of the upper pin 12 moves to the right, the central pin 15 moves to the central position 43, that is, the cut position, and the disconnector 19 and the ground switch 20 are disconnected by the connecting device 14. It becomes the state of. At this time, the center pin 15 is moved to the position shown in FIG. 5C.
As shown by the alternate long and short dash line in FIG.

Next, the lower motor 8 operates from the state shown in FIG. 6B, the lower operating shaft 5 rotates, the lower slider 10 moves to the right, and the connecting lever 11 moves upward, as shown in FIG. 6C. Position 4
Rotating counterclockwise about 2, the lower position 44 of the lower pin 13 moves to the right, the central pin 15 moves to the right position 45, and the connecting device 14 puts the ground switch 20 in the ON state. At this time, the center pin 15 is located in the recess 39 on the left side as shown by the chain double-dashed line in FIG. 5C.

Then, from the ON state of the disconnector 19 of FIG. 6A to the OFF state of the disconnector 19 and the grounding switch 20 of FIG. 6B, FIG.
When shifting from the off state of B to the on state of the grounding switch 20 of FIG. 6C, that is, when the center pin 15 sequentially moves each recess 39 from the right side to the left side, the center pin 15 moves between the recesses 39 of the rotary plate 35. 5A, the rotary plate 35 rotates counterclockwise when viewed from FIG. 5A, the wire 34 is pulled and the locking lever 31 rotates right, and one end of the locking lever 31 is viewed as shown in FIG. 5B. Pushes up the iron core 29 and holds it in the locking position, and the contact plate 2
The latch shaft 25 is rotated clockwise via 6 and the lower end of the hacker 24 is locked to the latch body 27 of the latch shaft 25, and the free state of tripping the circuit breaker is maintained. In other words, even if a closing command is input, the cutoff state is maintained and it cannot be closed.

[0012]

In the case of the above-mentioned conventional device, the center pin 15 of the connecting lever 11 slides in the recesses 39 of the rotary plate 35, so that the recesses 39 and the lower edge portion between the recesses 39 are formed. It is necessary to make the shape a smooth curve to some extent, and moreover, since the operating angle of the rotating plate 35 and the pushing-up dimension of the iron core 29 are directly linked, the adjustment of the wire 34 during assembly is delicate and difficult.

Further, the push-up amount of the iron core 29 is affected by the rattling of mechanical parts such as the connecting lever 11 and the rotating plate 35, wear and expansion and contraction of the wire 34 and sleeve 32 due to temperature changes.

Therefore, from the normal position of the center pin 15 in which the disconnecting switch 19 and the earthing switch 20 are turned on and off, that is, from the left position 41, the center position 43, and the right position 45 of the center pin 15, the center pin 15 is to some extent. Even if they are separated, the circuit breaker closing operation can be performed, and the range thereof is wide, and the operation of blocking the circuit breaker closing is inaccurate.

In consideration of the above-mentioned point, the present invention surely performs the closing operation of the circuit breaker when it is in the normal position, and reliably blocks the closing operation of the circuit breaker when it is in a position other than the normal position. An object of the present invention is to provide a locking device for an operating device for a switchgear.

[0016]

In order to solve the above-mentioned problems, the locking device according to claim 1 of the operating device for the opening / closing device of the present invention is an upper operating shaft for a disconnecting device and a grounding opening / closing switch provided in parallel. A lower operating shaft for dexterity, an upper slider and a lower slider that are respectively screwed into both operating shafts and that move left and right by the rotation of both operating shafts,
A connecting lever whose both ends are connected to both sliders, and a connecting lever which is connected to a central portion of the connecting lever. One end position of the central portion turns on a disconnecting switch, the other end position turns on a grounding switch, and the central position causes a disconnecting switch. And a connecting device for opening and closing the grounding switch in three states, a locking lever for locating the iron core of the breaking solenoid of the breaker in the locking position and the releasing position, and both sliders for both operating shafts. When one of the sliders is located at a position other than the ends of both operating shafts, one of the sliders moves to the unlocked position by moving the lock lever when the other is located at the end. The end on the slider side of (1) is provided with two wires that move the locking lever in the opposite direction to hold the iron core at the locking position.

Therefore, the normal position where the disconnecting switch and the ground switch are turned on and off and the other positions of the connecting lever are distinguished from each other by the movement of the central portion of the connecting lever, not by the movement of the central portion. Since it is distinguished by the presence or absence of the tension of the two wires connected to both sliders that move the double distance, the closing operation of the breaker at the normal position and the closing operation of the breaker at other positions are blocked. Can be done reliably.

Moreover, since the attachment condition of the two wires is not linked to the moving amount of the iron core, the adjustment of the wires at the time of assembly is easy.

Further, the influence on the moving amount of the iron core, such as the rattling of the mechanical portion such as the connecting lever and the expansion and contraction of the wire portion due to wear and temperature change, can be ignored.

The lock device according to a second aspect of the present invention is provided with an upper support rod and a lower support rod which are respectively provided in parallel to both operation shafts, and movably provided at a left end portion and a right end portion of both support rods, respectively. A left pressing body and a right pressing body, a pressing portion projecting from each of the two sliders, a stopper provided inside each pressing body for restricting the inward movement of each pressing body, and a lock. A fixing plate provided near the lever, a sleeve provided between the fixing plate and both right pressing bodies, and a sleeve inserted respectively into both sleeves, one end of which penetrates both right pressing bodies and both left and right Two wires connected to the pressing body, the other end of which penetrates the fixing plate, and the other ends of both wires, which are respectively provided, press the other end of both wires against the locking lever, Equipped with a spring urged in the locking direction, both sliders can press either one of the pressing bodies. When pressure is applied, the locking lever is moved through the other ends of both wires to position the iron core in the release position, and when one of the sliders separates from the pressing body, The other end of the wire is pressed against the locking lever to hold the iron core at the locking position.

Further, in the locking device according to a third aspect of the present invention, the base portion is rotatably supported by the fixed plate, and the tip portions respectively position the iron cores of the breaking solenoids of the circuit breaker at the locking position and the releasing position. Locking lever, an upper support rod and a lower support rod that are respectively provided in parallel to both operating shafts, and a left pressing member and a right pressing member that are movably provided at the left end portion and the right end portion of both supporting rods, respectively. , Between the sliders, the pressing portions projecting from the two sliders, the stoppers provided inside the pressing bodies for restricting the inward movement of the pressing bodies, and the fixing plate and the right pressing bodies. The sleeves provided respectively, and inserted into both sleeves, one end penetrates both right pressing bodies and is connected to both left pressing bodies, and the other end penetrates the fixing plate and is connected to both locking levers. 2 wires and a spring that biases the locking lever in the locking direction. , When both sliders press one of the pressing bodies respectively, both wires are pulled, the iron core is positioned at the release position via the locking lever, and one of the sliders moves from both pressing bodies. At the time of disengagement, the wire on one of the sliders holds the iron core in the locking position by the urging force of the spring.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described with reference to FIGS. (Mode 1) First, according to mode 1, FIG. 1 showing a schematic perspective view, FIG. 2 showing a left side view of a part of FIG. 1, and FIG. 3A, B showing a front view of the operating state of FIG. C, D, and E will be described. In these figures, the same symbols as those in FIGS. 5 and 6 indicate the same or corresponding ones.

Reference numerals 46 and 47 denote upper and lower supporting rods provided in parallel below the upper operating shaft 3 and above the lower operating shaft 5, respectively, and 48 and 49 denote left and right ends of both supporting rods 46 and 47. And 50 are springs provided between the left side plate 1 and the left side pressing body 48, and between the right side plate 2 and the right side pressing body 49, respectively. , 49 are urged inward.

Reference numeral 51 is a stud bolt having two bases planted on both side plates 1 and 2, and a tip portion of each stud bolt 48,
49. Reference numeral 52 is a stopper formed of a nut screwed to the tip of the stud bolt 51, and restricts the inward movement of the pressing bodies 48 and 49. Reference numerals 53 and 54 denote an upper pressing portion and a lower pressing portion projectingly provided on the lower surface of the upper slider 9 and the upper surface of the lower slider 10, respectively. Both supporting rods 46 and 47 penetrate the both pressing portions 53 and 54, respectively. are doing.

Reference numeral 55 is a fixed plate provided above the locking lever 31, 56 is a sleeve provided between the fixed plate 55 and both right pressing bodies 49, and 57 is a sleeve inserted in both sleeves 56. One wire penetrates both right pressing bodies 49, and the other end penetrates the fixing plate 55. Reference numeral 58 denotes a connecting body made of hooking metal fittings provided at one end of each wire 57, which is locked to both left pressing bodies 48, and one end of both wires 57 is connected to both left pressing bodies 48.

Reference numeral 59 is a press-contact member attached to the other end of each wire 57, and 60 is a spring provided on each of the fixing plate 55 and the press-contact member 59. The other end of each wire 57 is attached to the locking lever 31. The iron core 30 is held in the locking position by being pressed against the other end from above.

Next, the operation will be described. First, FIG.
As shown in A, when the disconnector 19 is turned on, the upper slider 9,
The lower slider 10 is located at the right end of the upper operating shaft 3 and the lower operating shaft 5, and the center pin 15 of the connecting lever 11 is located at the right position 45.

At this time, both left pressing bodies 48 are restricted from moving inward by the stoppers 52, that is, both wires 57.
With one end of the slider fixed, the pressing portions 53 and 54 of the sliders 9 and 10 press the right pressing body 49, and the sleeve 5
6 is bent and the other ends of both wires 57 are pulled, and as shown by the arrow in FIG.
The lock lever 31 is rotated counterclockwise by the spring 40, the iron core 29 of the breaking solenoid 28 is moved downward and held at the release position, and the breaker is ready to be closed.

Next, when the upper operation shaft 3 is rotated from the state of FIG. 3A, the upper slider 9 moves to the left side and is disengaged from the upper right pressing body 49 and bent as shown in FIG. 3B. As the sleeve 56 extends, the right pressing body 49 moves inward by the spring 50 and contacts the stopper 52.

At this time, the pressure contact body 59 is urged downward by the spring 60 to press the other end of the locking lever 31, and the locking lever 31 rotates right against the spring 40, and the locking lever 31 is rotated.
One end pushes up the iron core 29 and holds it in the locking position, and the closing operation of the circuit breaker is blocked.

Next, as shown in FIG. 3C, the upper slider 9
Is moved to the left end of the upper operation shaft 3, the disconnector 19 and the ground switch 20 are turned off, the upper left pressing body 48 is pressed by the upper pressing portion 53 of the upper slider 9, and the left pressing body 48 is pressed. Moves outward and separates from the stopper 52, and the upper wire 5
7, one end of the core 7 is pulled, and as shown in FIG.
Is in the release position.

Next, when the lower operation shaft 5 is rotated from the state shown in FIG. 3C, the lower slider 10 moves to the left side as shown in FIG. 3D, and is disengaged from the lower right pressing body 49 to bend. When the sleeve 56 extends, the spring 50 causes the right pressing body 49 to move.
Moves inward and contacts the stopper 52, and the pressure contact body 59 of the lower wire 57 presses the other end of the locking lever 31 to block the closing operation of the circuit breaker, as in FIG. 3B.

Next, as shown in FIG. 3E, the lower slider 1
When 0 moves to the left end of the lower operation shaft 5, the ground switch 20
And the lower left pressing body 48 is pressed by the lower pressing portion 54 of the lower slider 10, and the left pressing body 48 is pressed as in FIG. 3C.
The one end of the lower wire 57 is pulled by the
9 is located at the release position.

(Mode 2) FIG. 4 showing a front view of a part, a front view of another part, and a plan view of a part of the second mode.
A, B, and C will be described. In the figure, the same reference numerals as those in FIG. 1 indicate the same or corresponding ones.

Reference numeral 61 is a fixed plate that is long in the left-right direction, 62 is a support piece formed by bending the fixed plate 61 upward from the front edge portion and the rear edge portion, and 63 is two flat U-shaped chains. It is a lock lever, and the upper end on the right side is rotatably supported by the support piece 62 by a bolt 64, and the upper end on the left side is in contact with the iron core 29 of the shutoff solenoid 28. The upper piece 67 is a long U-shaped locking metal fitting 65 attached to the left bent piece 66 of both support pieces 62, and the upper piece 67 is located on the lower surface of the shutoff solenoid 28. .

Reference numeral 68 is a through hole formed in the upper piece 67,
The iron core 29 of the shutoff solenoid 28 moves up and down through the through hole 68, and the left upper end portion of both locking levers 63 is located below the through hole 68. 69 is a lower piece of the locking metal fitting 65,
The locking lever 63 that has rotated clockwise contacts and limits the amount by which the iron core 29 is pushed up.

Reference numeral 70 denotes a bent piece formed by bending downward from the right end of the fixed plate 61, and the other ends of the two wires 57 pass through. Reference numeral 71 is a mounting body mounted on both ends of both wires 57, and includes a left pressing body 48 and a locking lever 63.
It is attached by a pin 72 to the lower end portion on the right side of. 73
Is a spring provided at the other end of the wire 57 and biases the locking lever 63 in the clockwise direction, that is, in the locking direction.

Next, the operation will be described. FIG. 4A shows a state in which the disconnector 19 is turned on, the sliders 9 and 10 are located at the right end portions of the operation shafts 3 and 5, and the sliders 9 and 10 are pressed by the pressing portions 53 and 54. Both sleeves 56 are pressed through the right pressing body 49, the other ends of both wires 57 are pulled against the spring 73, as shown by the chain line in FIG. 4B, the locking lever 63 rotates counterclockwise, and the iron core 29 moves down to the release position, and the circuit breaker is ready to be closed.

When both sliders 9 and 10 press one of the pressing bodies 48 and 49, both wires 57 are pulled, and the circuit breaker is ready to be closed as described above.

Further, either one of the sliders is the pressing member 4
The wire 5 on one of the sliders when it is disengaged from 8, 49
7 holds the iron core 29 in the locking position by the urging force of the spring 73, and the closing operation of the circuit breaker is blocked.

As described above, in any of the above modes 1 and 2, it is necessary to distinguish between the normal positions of the connecting lever 11 in which the disconnecting switch 19 and the ground switch 20 are turned on and off, and the other positions. , Two wires 57 connected to both sliders 9 and 10
Since it is converted to the presence or absence of the tension, it can be transmitted digitally instead of using the rotary plate 35 for analog transmission as shown in FIG. 5, and the operation is reliable.

[0042]

Since the present invention is constructed as described above, it has the following effects. The lock device of the operating device for a switchgear according to the present invention, when the upper slider 9 and the lower slider 10 are located at the ends of the upper operating shaft 3 and the lower operating shaft 5 by the two wires 57, The respective ends move the locking levers 31, 63 to position the iron core 29 of the shutoff solenoid 28 at the release position, and one of the sliders is at a position other than the ends of the operation shafts 3, 5. When it is located, one of the slider-side ends holds the iron core 29 in the locking position, so that the disconnecting switch 19 and the grounding switch 20 of the connecting lever 11 are in the normal position. And the other positions are distinguished from each other by the tension of the two wires 57 connected to both the sliders 9 and 10 which move not the movement of the central portion of the connecting lever 11 but the distance twice the central portion. It can be distinguished by the presence or absence of the circuit breaker. The blocking of the closing operation of the cross-sectional unit can be reliably performed.

Moreover, since the tension of the two wires 57 is not linked to the moving amount of the iron core 29, the wire 57 can be easily adjusted during assembly.

In addition, rattling of the mechanical portion such as the connecting lever 11 and expansion and contraction of the wire 57 portion due to wear and temperature change,
The influence on the moving amount of the iron core 29 can be ignored.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a first embodiment of the present invention.

FIG. 2 is a left side view of a part of FIG.

3A, 3B, 3C, 3D and 3E are front views showing the operating states of FIG.

FIG. 4A is a front view of a part of the second embodiment of the present invention, B
Is a front view of another part, and C is a plan view of B.

5A is a schematic view of a conventional example, B is a left side view of a part of A, and C is a rear view of another part of A. FIG.

6A, 6B and 6C are front views showing the operating state of FIG. 5, respectively.

[Explanation of symbols]

 3 Upper operating shaft 5 Lower operating shaft 9 Upper slider 10 Lower slider 11 Connecting lever 14 Connecting device 19 Disconnector 20 Grounding switch 28 Breaking solenoid 29 Iron core 31 Locking lever 46 Upper supporting rod 47 Lower supporting rod 48 Left pressing body 49 Right pressing body 52 Stopper 53 Pressing part 54 Pressing part 55 Fixing plate 56 Sleeve 57 Wire 60 Spring 61 Fixing plate 63 Locking lever 73 Spring

Claims (3)

[Claims] 1. An upper operating shaft for a disconnecting switch and a lower operating shaft for a grounding switch, which are provided in parallel, and an upper slider that is screwed into each of the both operating shafts and moves left and right by the rotation of the both operating shafts. And a lower slider, a connecting lever whose both ends are connected to the both sliders, and a connecting lever which is connected to a central portion of the connecting lever. A coupling device for opening and closing the disconnecting switch and the grounding switch in three states according to the opening and closing position of the device, and a locking lever for positioning the iron core of the breaking solenoid of the circuit breaker at the locking position and the releasing position. And when the both sliders are located at the ends of the operation shafts, the ends move the locking levers to position the iron core at the release position, and one of the sliders is released. Is located at a position other than the ends of the both operating shafts, And a pair of wires for holding the iron core in the locking position by moving the locking lever in the opposite direction at one end on the side of the slider. Locking device. 2. An upper operating shaft for a disconnecting switch and a lower operating shaft for a grounding switch, which are provided in parallel, and an upper slider that is screwed into each of the operating shafts and moves left and right by the rotation of the operating shafts. And a lower slider, a connecting lever having both ends connected to the both sliders, and a connecting lever connected to a central portion of the lever. One end position of the central portion inserts a disconnecting switch, and the other end position provides a ground switch. A connecting device for opening and closing the disconnecting switch and the grounding switch in three states depending on the on / off position of the switch, and a locking lever for positioning the iron core of the breaking solenoid of the circuit breaker at the locking position and the releasing position. An upper support rod and a lower support rod that are respectively provided in parallel with the operation shafts, and a left pressing member and a right pressing member that are movably provided at left end portions and right end portions of the both support rods, respectively. A pressing portion protruding from the slider, A stopper provided inside the pressure body for restricting the inward movement of each pressing body, a fixing plate provided in the vicinity of the locking lever, and a space between the fixing plate and the right pressing bodies. And two sleeves respectively inserted in the sleeves, one end of which penetrates the right pressing bodies and is connected to the left pressing bodies, and the other end of which penetrates the fixing plate. A wire and a spring that is respectively provided at the other ends of the two wires, presses the other ends of the both wires against the locking lever, and urges the locking lever in the locking direction. When each of the sliders presses one of the pressing bodies, the locking lever is moved through the other ends of the both wires to position the iron core at the release position, and one of the sliding members is pressed. When the mover separates the two pressing bodies, the one slider The wire of the other end said locking lever switchgear manipulation instrument locking device, characterized in that pressed against retaining said core in locking position in the. 3. An upper operating shaft for a disconnecting switch and a lower operating shaft for a grounding switch, which are provided in parallel, and an upper slider which is screwed to each of the both operating shafts and moves left and right by rotation of the both operating shafts. And a lower slider, a connecting lever having both ends connected to the both sliders, and a connecting lever connected to a central portion of the lever. One end position of the central portion inserts a disconnecting switch, and the other end position provides a ground switch. A connection device for opening and closing the disconnecting switch and the earthing switch depending on the central position of the disconnecting switch and the ground switch, and the base part is rotatably supported by the fixed plate and the tip part of the disconnecting solenoid of the circuit breaker. Two locking levers for locating the iron core at the locking position and the unlocking position, an upper supporting rod and a lower supporting rod provided in parallel to the both operating shafts, and a left end portion and a right end portion of the both supporting rods. Left pressing body and right pressing movably A body, a pressing portion projecting from each of the two sliders, a stopper provided inside each of the pressing bodies for restricting inward movement of each of the pressing bodies, the fixing plate and the both Sleeves provided between the right pressing body and the sleeves respectively inserted into the sleeves, one end of which penetrates the right pressing bodies and is connected to the left pressing bodies, and the other end of which is the fixing plate. 2 which penetrates through and is connected to the both lock levers
A wire and a spring that biases the locking lever in the locking direction, and when the sliders press one of the pressing bodies, the wires are pulled and the chain is pulled. When the iron core is positioned at the release position via the lock lever and one of the sliders is separated from both the pressing bodies, the wire on the one slider side is urged by the urging force of the spring. A locking device for an operating device for a switchgear, which holds an iron core at a locking position.