JP3484933B2 - Switchgear operating device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch operating device used for a pole switch for power distribution and the like. 2. Description of the Related Art A conventional switch operating device will be described with reference to FIGS. 3A is a front view, B is a cut left side view of a part of A, FIG. 4A is a front view with a part of FIG. 3A removed, B is a cut left side view of a part of A, FIG. A
4A is a rear view of a loading preparation state of FIG. 4A, FIG. 6B is a rear view of a loading state, FIG. 6A is a rear view of a blocking state of FIG. In these figures, 1 is an operating device, 2,
Reference numeral 3 denotes a front plate and a rear plate of the apparatus 1, 4 and 5 denote a front support plate and a rear support plate erected between the front plate 2 and the rear plate 3, and 6 denotes a support provided between the support plates 4 and 5. And a plurality of hexagonal column-shaped connecting rods having screw holes at both ends. Reference numeral 7 denotes a bolt that penetrates through the corners of the support plates 4 and 5 and is screwed into screw holes at both ends of the connecting rod 6. It is mounted with the spacing of. [0004] Reference numeral 8 denotes a bearing provided at the center of the lower part of the rear plate 3 and both supporting plates 4 and 5, 9 denotes a main shaft rotatably supported by each bearing 8, and 10 denotes a main shaft whose base is fixed to the main shaft 9. Lever, 11 is a first pin penetrating the upper edge of the main shaft lever 10, 12 is a planting rod planted in the lower part of the back surface of the front support plate 4, 13 is a first pin 11 at both ends, and a planting rod 12 And biases the main shaft lever 10 in the closing direction (to the right in the front view). 14 is the spindle lever 10
And a contact surface formed in front of the spindle lever 10 when the spindle lever 10 rotates in the closing direction (FIG. 4A).
In the lower surface). 15 is the main shaft 9
The contact portion 14 of the main shaft lever 10 contacts the stopper 15. Reference numeral 16 denotes a locking portion formed at the tip of the input surface of the spindle lever 10. Reference numeral 17 denotes a bearing provided on the lower right side of the support plates 4 and 5, and reference numeral 18 denotes a closing latch pin rotatably supported by the bearings 17. It is derived from the plate 4. 19 is a closing latch pin 1
8 is a half-moon-shaped engaging section,
The engaging portion 16 of the main shaft lever 10 urged by the closing spring 13 is pressed against the engaging portion 19. Reference numeral 20 denotes a loading lever, which is a long substrate 2
1 and a bent plate 22 formed at one end of the substrate 21, and a contact portion 23 is formed at the other end of the substrate 21. Reference numeral 24 denotes a locking rod implanted at one end of the substrate 21, and reference numeral 25 denotes a screw, which penetrates through the lower end of the bent plate 22 and is screwed into the led-out front end of the insertion latch pin 18. A closing lever 20 is mounted on the latch pin 18. Reference numeral 26 denotes an elongated hole formed at the upper end of the bent plate 22. Reference numeral 27 denotes a closing solenoid provided at the lower right side of the front surface of the front support plate 4, and reference numeral 28 denotes a closing solenoid 27.
, And is sucked rightward by energization of the solenoid 27. Reference numeral 29 denotes a link whose base is rotatably supported by the tip of the plunger 28, and the tip of the link 29 is inserted into the elongated hole 26 of the bent plate 22. Reference numeral 30 denotes a guide hole formed at the tip of the link 29, into which the locking rod 24 is loosely inserted. Reference numeral 31 denotes a spring provided on the plunger 28, which urges the plunger 28 in the outward direction. Reference numeral 32 denotes a stopper implanted at the lower right end of the front surface of the front support plate 4, and the contact portion 23 of the input lever 20 is in contact with the stopper 32. Reference numeral 33 denotes a pair of front and rear shut-off levers, the base of which is rotatably supported by the main shaft 9. 3
Reference numeral 4 denotes a contact portion formed on the front shut-off lever 33,
The shut-off lever 3 when the shut-off lever 33 rotates in the shut-off direction
3 is formed at the front end of the front blocking surface (left surface in FIG. 4A). Reference numeral 35 denotes a locking portion formed on the rear shut-off lever 33, which is formed on the shut-off surface of the extended distal end of the rear shut-off lever 33. Reference numeral 36 denotes a roller provided at the center of the shut-off lever 33, and 37 denotes a second pin supported by the shut-off lever 33. Reference numeral 38 denotes a stopper implanted on the upper left side of the front surface of the rear support plate 5.
Abuts on the contact portion 34. Reference numeral 39 denotes a shut-off latch pin, which is rotatably supported by a bearing 17 provided at the center of the upper portion of both support plates 4 and 5, similarly to the closing latch pin 18, and has a front end penetrating the front support plate 4 and a front support plate. 4, an engaging portion 40 having a semicircular cross section is formed at the rear end. Reference numeral 41 denotes a shut-off lever,
A bent portion 43 is formed at the center of the substrate 42, and a contact portion 44 is formed at one end of the substrate 42.
A locking rod 24 is planted at the other end of the front support plate 4, and the contact portion 44 is in contact with the stopper 32 planted at the center of the upper end of the front support plate 4. Reference numeral 45 denotes a shut-off solenoid provided on the upper right side of the front surface of the front support plate 4;
Similarly to the above, the plunger 46 is urged in the protruding direction by the spring 31, the link 29 is rotatably supported at the tip of the plunger 46, and the locking rod 24 is inserted into the guide hole 30 of the link 29.
Is loosely inserted, and an annular stopper plate 47 is provided at the front end of the locking rod 24.
Departures are prevented. Reference numeral 48 denotes a front-rear support rod implanted on the upper right side of the front surface of the rear support plate 5, and 49 denotes a cylindrical spring guide, the base of which is rotatably supported by the support rod 48. It is located between the shut-off levers 33 on the side. Reference numeral 50 denotes a flange-shaped receiving plate fixed to the base of the spring guide 49; 51, an elongated hole formed on the distal end side of the spring guide 49; 52, a moving body slidably contacting the spring guide 49; A blocking spring provided between the plate 50 and the moving body 52;
2 to the distal end side of the spring guide 49, and the
Located to the right of A third pin 54 penetrates the moving body 52, is loosely inserted into the long hole 51, and both ends are supported by the front and rear shut-off levers 33. Reference numeral 55 denotes an operating spring in which a plurality of spring elements are stacked, and is provided substantially in parallel below the shut-off spring 53. As in the case of the shut-off spring 53, the base of the spring guide 49 is connected to the support rod 48. The moving body 52, which is supported by the spring guide 49 and slidably contacts the spring guide 49, is urged toward the distal end by the operation spring 55,
A pin 56 extends through the moving body 52. Reference numeral 57 denotes a pair of closing links, one end of which is connected to the first pin 11 of the main shaft lever 10 and the other end of which is connected to the fourth pin 56 of the operation spring 55. 58 is 2
One set of the breaking links is located outside the breaking lever 33, one end is connected to the second pin 37, the other end is connected to the fourth pin 56, and the outside of the closing link 57. 59
Is a pair of connecting links, which is located inside the shut-off lever 33, and has one end connected to the first pin 11 and the inside of the closing link 57. Reference numeral 60 denotes an elongated hole formed at the other end of the connecting link 59, into which the second pin 37 is loosely inserted. The fourth pin 56 is operated by the operating spring 55.
The other ends of the closing link 57 and the breaking link 58 are pressed through the opening link 57, and the main shaft lever 10 is urged in the closing direction of the main shaft 9 via the closing link 57 and the first pin 11.
8, the shut-off lever 33 is urged in the shut-off direction of the main shaft 9 via the second pin 37, the tip end of the shut-off lever 33 is pressed by the shut-off spring 53 via the third pin 54, and the shut-off lever 33 is moved in the shut-off direction. Has been energized. Reference numeral 61 denotes a motor provided on the upper left side of the apparatus 1, reference numeral 62 denotes a small sprocket fixed to a rotating shaft of the motor 61, and reference numeral 63 denotes a rotatably supported left side of the main shaft 9 of the supporting plates 4 and 5. A large sprocket 64 is fixed to the rear portion of the cam shaft 63, and 65 is both sprockets 62 and 64.
A chain 66 is fixed to a front portion of the cam shaft 63. The cam 66 is driven by the motor 61 to rotate through the small sprocket 62, the chain 65, the large sprocket 64, and the cam shaft 63, and The peripheral surface of 66 abuts against the roller 36 of the shut-off lever 33 in the shut-off state, urges the operating spring 55 in the direction of energy accumulation via the second pin 37 and the shut-off link 58, and shuts off the spring via the third pin 54. 53 is urged in the direction of energy storage. Next, the operation will be described. First, FIG.
In the closing preparation state of FIG. 5A, the closing solenoid 27 and the shutoff solenoid 45 are not energized, and the respective plungers 28 and 46 are in the out state, and the one end of the guide hole 30 of the link 29 of both the plungers 28 and 46. The closing lever 24 of the closing lever 20 and the closing lever 41 abuts,
The contact portions 23 and 44 of the levers 20 and 41 are in contact with the lower and upper stoppers 32. On the other hand, the engaging portion 16 of the main shaft lever 10 is engaged with the engaging portion 19 of the closing latch pin 18 and the shut-off lever 33 is engaged.
Is locked to the engaging portion 40 of the shut-off latch pin 39, the closing spring 13 is pulled by the first pin 11, and the power is stored (FIG. 5A), and the fourth pin 56 is used as the spring guide of the operating spring 55. 49 is located at one end of the long hole 51 and the second pin 37
Is located below the elongated hole 60 of the connecting link 59, the third pin 54 is located at one end of the elongated hole 51 of the spring guide 49 of the shut-off spring 53, and both springs 53 and 55 are compressed and stored.
An operation spring 55 is connected to a closing link 57 via a fourth pin 56,
The other end of the blocking link 58 is pressed. Then, the spindle lever 10 is operated by the operation spring 55,
The closing spring 3 is urged in the closing direction by the closing spring 13.
3 is urged in the blocking direction by the operation spring 55 and the blocking spring 53. Next, upon receiving a closing command, the closing solenoid 27 is instantaneously excited, and the plunger 28 of the closing solenoid 27 is attracted and moves rightward.
The closing lever 24 rotates via the locking rod 24 and the closing latch pin 18 fixed to the closing lever 20.
Is rotated, and the contact portion 23 of the input lever 20 is
Leave 2 The rotation of the closing latch pin 18 causes the locking portion 16 of the spindle lever 10 to move to the closing latch pin 18.
5B, the main shaft lever 10 rotates in the closing direction, and the main shaft 9 rotates by the releasing force of the operation spring 55 and the pulling force of the closing spring 13, as shown in FIG. 5B in the closed state. It will be turned on. At this time, the contact portion 14 of the main shaft lever 10 comes into contact with the stopper 15 to restrict the rotation of the main shaft lever 10, and the main shaft lever 10 is engaged with the engaging portion 19 of the closing latch pin 18.
Is located in the notch. For this reason, when the closing solenoid 27 is de-energized, the closing latch pin 18 causes the spring 3 of the solenoid 27 to move.
1 attempts to rotate to the locked position, but the rotation is blocked and the closing latch pin 18 is held in the released position. The rotation of the main shaft lever 10 causes the spring guide 49 of the operation spring 55 to rotate slightly about the support rod 48 via the closing link 57, and the fourth pin 56 to move to one end of the elongated hole 51 of the spring guide 49. The second pin 37 of the shut-off lever 33 is moved from the portion to a substantially central portion, and the second pin 37 of the shut-off lever 33 is moved by the rotation of the main shaft lever 10.
9 moves from the lower part of the long hole 60 to the upper part. Next, when a shutoff command is received, the shutoff solenoid 45 is instantaneously excited, and the plunger 46 of the shutoff solenoid 45 is attracted and moves rightward. 41 is rotated, and the shut-off latch pin 39 fixed to the shut-off lever 41 is rotated.
Is rotated, and the contact portion 44 of the shut-off lever 41 is
Leave 2 The rotation of the cut-off latch pin 39 causes the locking portion 35 of the cut-off lever 33 to move.
, The distal end of the shut-off lever 33 is urged in the shut-off direction via the third pin 54 by the urging force of the shut-off spring 53, and the shut-off links 58, Shut-off lever 33 via second pin 37
Is urged in the shut-off direction, the shut-off lever 33 rotates in the shut-off direction, the main shaft 9 rotates in the shut-off direction, and enters the shut-off state as shown in FIG. 6A in the shut-off state. At this time, the contact portion 34 of the cut-off lever 33 comes into contact with the stopper 38, and the rotation of the cut-off lever 33 is restricted. The fourth pin 56 moves from one end of the long hole 51 to the other end thereof, and moves from the center of the long hole 51 of the spring guide 49 of the operation spring 55 to the other end via the blocking link 58. Then, the main shaft lever 10 rotates through the connecting link 59, the locking portion 16 of the main shaft lever 10 passes through the notch of the engaging portion 19 of the closing latch pin 18, and the closing latch pin 18 is moved to the closing solenoid 27. Is rotated by the spring 31 from the position in the released state to the position in the locked state,
The locking portion 16 of the main shaft lever 10 is locked to the engaging portion 19 of the closing latch pin 18, and the rotation of the main shaft lever 10 pulls the closing spring 13 to accumulate energy. Next, upon receiving the input preparation command, the motor 6
1 is driven, the cam 66 is rotated via the small sprocket 62, the chain 65, the large sprocket 64 and the cam shaft 63, and as shown in FIG.
The cam 66 contacts the peripheral surface of the cam 66, and as the cam 66 rotates, the shut-off lever 33 rotates in the energy storing direction. Then, the contact portion 34 of the shut-off lever 33 is separated from the stopper 38, and the second pin 37 is connected to the connecting link 59.
Moves from the upper part to the lower part of the long hole 60, the tip of the shut-off lever 33 comes into contact with the engaging part 40 of the shut-off latch pin 39, and rotates the shut-off latch pin 39. 39 is rotated to the locked position by the spring 31 of the blocking solenoid 45 via the blocking lever 41, and the locking portion 35 of the blocking lever 33 is locked to the engaging portion 40 of the blocking latch pin 39. At this time, the rotation of the shut-off lever 33 causes the third pin 54 to move the long hole 51 of the spring guide 49 of the shut-off spring 53.
From the other end to one end, the blocking spring 49 is compressed and stored, and the fourth pin 56 moves from the other end of the elongated hole 51 of the spring guide 49 of the operating spring 55 to one end, and The spring 55 is compressed and stored, the shut-off lever 33 is urged in the shut-off direction by the shut-off spring 53 and the operating spring 55, and the main shaft lever 10 is urged in the closing direction by the closing spring 13 and the operating spring 55. 5A. In the case of the above-mentioned conventional apparatus, in order to release the locking states of the main shaft lever 10 and the closing latch pin 18, and between the shut-off lever 33 and the shut-off latch pin 39, the closing latch pin 18 and the closing latch pin 39 are released. Cut-off latch pin 3
9 needs to be rotated by a predetermined angle, and the linear motion of the plunger 28 of the closing solenoid 27 and the plunger 46 of the shutoff solenoid 45 is controlled by the link 29 and the closing lever 2.
0, the rotational motion must be converted via the shut-off lever 41 and the like, and there is a problem that the structure for operating both latch pins 18 and 39 becomes complicated. It is an object of the present invention to provide a switch operating device which simplifies the structure for operating the closing latch pin of the main shaft lever and the shut-off latch pin of the shut-off lever, keeping the above points in mind. [0034] In order to solve the above problems, a switch operating device according to the present invention comprises a main shaft for turning on and off a switch by rotation, and a base fixed to the main shaft. A main shaft lever, a shut-off lever whose base is rotatably supported by the main shaft, a pin provided on the shut-off lever, a closing link having one end connected to the main shaft lever, and one end connected to the pin; A blocking link having one end connected to the other end of the closing link, a connecting link having one end connected to one end of the closing link, and a length formed at the other end of the connecting link, into which the pin is loosely inserted. A hole and said input link,
An operation of pressing the other end of the blocking link, biasing the spindle lever in the closing direction of the spindle via the closing link, and biasing the blocking lever in the blocking direction of the spindle via the blocking link. A spring, a blocking spring that presses a tip end of the blocking lever to urge the blocking lever in the blocking direction, and a roller provided at a central portion of the blocking lever;
A cam that presses the roller by rotation, stores the blocking spring via the blocking lever, and stores the operating spring via the blocking link; and a blocking lever after the both springs are stored. A closing latch pin that locks the leading end of the main shaft lever that rotates via the pin and the connecting link when the breaking lever is rotated at the time of breaking, and a closing latch pin that locks on the rotating shaft. Are directly connected to each other, and the energizing latch pin is rotated by a predetermined angle by energization to release the locked state of the main shaft lever to the energizing latch pin, and the energizing latch pin is rotated to the locked state by de-energization. A rotary solenoid, and the cut-off latch pin is directly connected to a rotating shaft, and the cut-off latch pin is rotated by a predetermined angle when energized;
A shut-off rotary solenoid for releasing the lock state of the shut-off lever to the shut-off latch pin and rotating the shut-off latch pin to the locked state by non-energization. Accordingly, the rotating shaft of the closing rotary solenoid is rotated by energization during closing, the closing latch pin directly connected to the rotating shaft is rotated by a predetermined angle, and the locked state of the main shaft lever to the closing latch pin is released. The energization at the time of interruption causes the rotation axis of the interruption rotary solenoid to rotate, and the interruption latch pin directly connected to the rotation axis to rotate by a predetermined angle,
The latching state of the shut-off lever to the shut-off latch pin is released, and the closing latch pin and the shut-off latch pin are rotated to the locked state by de-energizing when the operation spring and the shut-off spring are energized. There is no need to convert the linear movement of the plunger of the solenoid into a rotational movement, so that components such as a link and a lever are not required, and the structure for operating both latch pins can be simplified. One embodiment of the present invention will be described with reference to FIG. 1 showing a front view with a part removed and FIG. 2 showing a right side view of FIG. In these figures, the same reference numerals as those in FIGS. 3 to 6 indicate the same or corresponding elements, and the different points are as follows.
A closing rotary solenoid 67 is provided at the lower portion of the back surface of the front plate 2 of the operating device 1, a rotary shaft 68 of the solenoid 67 is directly connected to and fixed to the front end of the closing latch pin 18, and a shutoff rotary solenoid 69 is provided at the upper portion. , The rotary shaft 70 of the solenoid 69 is directly connected to and fixed to the front end of the cut-off latch pin 39.
Is provided with a spiral spring (not shown), which allows the closing latch pin 18 and the shut-off latch pin 39 connected to the respective rotating shafts 68 and 70 when the power is not supplied.
Are biased to rotate to the locked position. Next, the operation will be described. The illustrated state is a closing preparation state, and when the power is not supplied, the closing rotary solenoid 67 and the closing rotary solenoid 69 are turned off.
The rotating shafts 68 and 70 of FIG.
As in the case A, the locking portion 16 of the main shaft lever 10 is locked to the engaging portion 19 of the closing latch pin 18 and the shut-off lever 33 is engaged.
Is locked to the engaging portion 40 of the shut-off latch pin 39, the operating spring 55 and the shut-off spring 53 are compressed and stored, and the main shaft lever 10 is set in the closing direction and the shut-off lever 33 is set in the shutting direction. It is being rushed. Next, when a closing command is received, the closing rotary solenoid 67 is instantaneously excited, the rotation shaft 68 of the solenoid 67 rotates, and the closing latch pin 18 rotates. As in the case of FIG. By the rotation, the locking portion 16 of the main shaft lever 10 is moved to the closing latch pin 18.
Of the operation spring 55 and the closing spring 13
As a result, the main shaft lever 10 rotates in the closing direction to enter the closed state. Then, the charging rotary solenoid 67
Is de-energized, the closing latch pin 18 attempts to rotate to the locked state by the spiral spring of the solenoid 67. However, since the main shaft lever 10 is located in the notch of the engaging portion 19 of the closing latch pin 18, The rotation is prevented, and the closing latch pin 18 is held in the released state. Next, when a shutoff command is received, the shutoff rotary solenoid 69 is instantaneously excited, and the rotary shaft 70 of the solenoid 69 rotates to rotate the shutoff latch pin 39. As in the case of FIG. By the rotation, the locking portion 35 of the cut-off lever 33 is moved to the cut-off latch pin 39
From the engaging portion 40, the shut-off spring 53, the operation spring 55
As a result, the shut-off lever 33 rotates in the shut-off direction to enter the shut-off state. Then, the main shaft lever 10 is rotated via the connecting link 59, the engaging portion 16 of the main shaft lever 10 passes through the notch of the engaging portion 19 of the closing latch pin 18, and the closing latch pin 18 is moved to the closing rotary solenoid. The main spring lever is biased by the spiral spring 69 to rotate from the released position to the locked position, the main shaft lever 10 is locked to the closing latch pin 18, and the closing spring 13 is charged. Next, when receiving the input preparation command, the cam 66 is rotated by the driving of the motor 61 as in the case of FIG. 6B, and the peripheral surface of the cam 66 comes into contact with the roller 36 of the shut-off lever 33. With the rotation, the shut-off lever 33 rotates in the energy storing direction, the tip end of the shut-off lever 33 contacts the engaging portion 40 of the shut-off latch pin 39, and rotates the shut-off latch pin 39. The rotation of the shut-off rotary solenoid 69 is rotated by the spiral spring to the locked position, the shut-off lever 33 is locked by the shut-off latch pin 39, and the shut-off spring 53 and the operating spring 55 are compressed and stored, and the preparation for closing shown in FIG. State. Since the present invention is configured as described above, the following effects can be obtained. The switch operating device of the present invention rotates the rotating shaft 68 of the closing rotary solenoid 67 by energization at the time of closing, and rotates the closing latch pin 18 directly connected to the rotating shaft 68 by a predetermined angle.
The locking state of the main shaft lever 10 to the closing latch pin 18 is released, and at the time of interruption, the rotation shaft 70 of the interruption rotary solenoid 69 is rotated by energization, and the interruption latch pin 39 directly connected to the rotation shaft 70 is rotated by a predetermined angle. , Shut-off lever 3
3 is released from the locked state of the cut-off latch pin 39, and the closing latch pin 18 and the cut-off latch pin 39 are rotated to the locked state by de-energizing when the operation spring 55 and the cut-off spring 53 are energized. It is not necessary to convert the linear motion of the plunger of the solenoid into a rotary motion as in
Parts such as links and levers are not required, and both latch pins 1
The structure for operating 8, 39 can be simplified.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view in which a part of one embodiment of the present invention is removed. FIG. 2 is a right side view of FIG. 3A is a front view of a conventional example, and FIG. 3B is a cut-away left side view of a part of A. FIG. 4A is a front view in which a part of FIG. 3A is removed, and FIG. 4B is a cut left side view of a part of A. 5A is a rear view of the loading preparation state of FIG. 4A, and FIG. 5B is a rear view of the loading state. FIG. 6A is a rear view of the blocking state of FIG. 3A, and FIG. 6B is a rear view of the spring accumulating state. [Description of Signs] 9 Main shaft 10 Main shaft lever 18 Latch pin 33 Break lever 36 Roller 37 Pin 39 Break latch pin 53 Break spring 55 Operation spring 57 Break link 58 Break link 59 Link link 60 Slot 66 Cam 67 Rotary solenoid for closing 68 Rotation Shaft 69 Rotary solenoid 70 for shut-off

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-8-212861 (JP, A) JP-A-7-235246 (JP, A) JP-A-63-19718 (JP, A) 150740 (JP, U) Japanese Utility Model 2-62626 (JP, U) Japanese Utility Model 1-103237 (JP, U) Japanese Utility Model 1-100340 (JP, U) (58) Fields surveyed (Int. ⁷ , DB name) H01H 33/40 H01H 3/28 H01H 3/42 H01H 33/42

Claims (1)

(57) [Claim 1] A main shaft for turning on and off a switch by rotation, a main shaft lever having a base fixed to the main shaft, and a main shaft rotatably supported by the main shaft. A lever, a pin provided on the shutoff lever, a closing link having one end connected to the main shaft lever, a shutoff link having one end connected to the pin, and the other end connected to the other end of the closing link, A connecting link having one end connected to one end of the closing link, an elongated hole formed at the other end of the connecting link, into which the pin is loosely inserted, and pressing the other end of the closing link and the closing link. An operating spring for urging the spindle lever in the closing direction of the spindle via the closing link, and for urging the blocking lever in the closing direction of the spindle via the blocking link; Press A blocking spring for urging the blocking lever in the blocking direction, a roller provided at a central portion of the blocking lever, pressing the roller by rotation, and accumulating the blocking spring via the blocking lever; A cam for accumulating the operating spring via the interrupting link, an interrupting latch pin for locking the tip of the interrupting lever after the springs are energized, and a pin, A closing latch pin that locks a tip end of the main shaft lever that rotates via a connection link; and a closing latch pin that is directly connected to a rotating shaft, rotates the closing latch pin by a predetermined angle when energized, and sets the closing latch pin of the main shaft lever. A closing rotary pin for releasing the locked state to the closed state and rotating the closed latch pin to the locked position by de-energization; The cut-off latch pin is directly connected, the cut-off latch pin is rotated by a predetermined angle when energized, the locked state of the cut-off lever to the cut-off latch pin is released, and the cut-off latch pin is rotated to the locked state by de-energization. A switch operating device comprising a shut-off rotary solenoid.