JPH11144570A - Switching device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable closing a circuit with a circuit closing drive means in a completed state of circuit opening operation between a fixed contact and a moving contact. SOLUTION: Until circuit opening operation between a fixed contact 20 and a moving contact 21 is completed, an interlocking means 61 interlocking with a holding means 36 engages with a holding means 57 to obstruct the release of the holding operation of the holding means 57, and in a completed, state of circuit opening operation between the contacts 20, 21, the engagement of the interlocking means 61 with the holding means 57 is released, and the holding operation of the holding means 57 can be released with a circuit closing signal.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power switchgear.

[0002]

2. Description of the Related Art FIG.
FIG. 1 is a configuration diagram of a conventional opening / closing device described in Japanese Unexamined Patent Publication (Kokai) No. H10-15095. In the closed state of FIG. 6, when the opening electromagnet 1 is excited, the opening trigger 2 is rotated counterclockwise about the shaft 2a by the plunger 1a, and the engagement with the opening latch 3 is released. You. As a result, the latch 3 rotates counterclockwise about the shaft 3a and comes off the pin 4a of the output lever 4. As a result, the output lever 4 is rotated clockwise about the shaft 4b by the spring 5 as the opening drive means, and the movable contact 6 is separated from the fixed contact 7 and opened as shown in FIG. .

As shown in FIG. 6, in a state in which a spring 5 as a driving means for opening and a spring 8 as a driving means for closing are both energized, a kick lever 9 is moved by a spring 9a to a shaft 9a.
b is rotated counterclockwise around the opening b to open the electromagnet 1 for opening.
The operation piece 11 connected to the zero plunger 10a is pushed up. Therefore, even if the closing electromagnet 10 operates and the plunger 10a moves to the left in the figure, the plunger 10 and the closing trigger 12 do not engage with each other, so that the closing latch 13 is also engaged with the pin 14 as shown. It is kept stopped. Therefore, since the closing spring 8 is not released, the contacts 6 and 7 are not closed.

Next, the closing operation will be described. In FIG. 7, the closing spring 8 connected to the ratchet 15 is the camshaft 1.
6 is provided with clockwise turning power. And camshaft 1
The turning force of No. 6 is held by a latch 13 engaged with a pin 14 fixed to a ratchet 15. Therefore, when the closing electromagnet 10 is excited in this state, the trigger 12 is rotated in the counterclockwise direction and the latch 13 is released from the pin 14, so that the cam 17 fixed to the cam shaft 16 exerts the driving force of the spring 8. To rotate clockwise. At this time, since the cam 17 comes into contact with the roller 4c of the output lever 4 to rotate the output lever 4 counterclockwise, the movable contact 6 and the fixed contact connected to the output lever 4 as shown in FIG. 7 is closed, and the spring 5 is compressed and stored. And
The pin 4a and the latch 3 are engaged again.

[0005] Further, the operation of accumulating the spring 8 will be described. As shown in FIG. 8, immediately after the closing operation is completed, the spring 8 is in a biased state. Then, the eccentric pawl shaft 18 is rotated by the energy storage means (not shown), and the two pawls 19 a and 19 b attached to the pawl shaft 18 are engaged with the pawl wheel 15 to perform a swinging motion. Thereby, the pawl 1
The clock 5 is rotated clockwise, the spring 8 is charged, and the camshaft 16 is turned clockwise at a position beyond the dead point as shown in FIG. And camshaft 1
The driving force of No. 6 is held by the latch 13 engaged with the pin 14.

[0006]

Since the conventional switchgear is constructed as described above, the engagement between the kick lever 9 and the operation piece 11 is completed until the opening operation of both contacts 6 and 7 is completed. Since it is released, the closing spring 8 can be released. For this reason, during the transition from the closed state to the open state, the closing spring 8 is released by an erroneous signal, so that an unnecessary closing operation is performed even though the opening operation is not completed. Was.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide an opening / closing device in which a closing circuit can be closed by a closing driving means in a state where an opening operation of both contacts is completed. With the goal.

[0008]

According to the first aspect of the present invention, the opening / closing device holds the driving force of the first driving means by the first holding means, and controls the holding operation of the first holding means by the open circuit signal. The movable contact is released from the fixed contact by the first driving means, the driving force of the second driving means is held by the second holding means, and the holding operation of the second holding means is performed by the closing signal. In the opening / closing device which is released and closed between the two contacts by the second driving means, the interlocking means interlocking with the first holding means until the opening operation between the two contacts is completed is performed by the second holding means. The engagement between the interlocking means and the second holding means is released in a state where the opening operation between the two contacts is completed. The holding operation of the second holding means can be released by the closing signal. That.

According to a second aspect of the present invention, there is provided an opening / closing device comprising:
The driving force of the driving means is held by the first holding means, the holding operation of the first holding means is released by the opening signal, the movable contact is opened from the fixed contact by the first driving means, and An opening / closing device that holds the driving force of the driving means of the second holding means by the second holding means, releases the holding operation of the second holding means by the closing signal, and closes the contact between the two contacts by the second driving means. The first holding means engages with the second holding means to prevent the holding operation of the second holding means from being released until the opening operation between the two contacts is completed. When the opening operation of the second holding means is completed, the engagement between the two holding means is released, and the holding operation of the second holding means by the closing signal can be released.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a configuration diagram showing a closed state according to Embodiment 1 of the present invention. In FIG. 1, reference numeral 20 denotes a fixed contact, reference numeral 21 denotes a movable contact that comes into contact with and separates from the fixed contact 20, reference numeral 22 denotes a link mechanism connected to the movable contact 21, reference numeral 23 denotes a frame, and reference numeral 24 denotes an opening for outputting a driving force. The driving means accumulates a counterclockwise driving force as shown. Reference numeral 25 denotes an opening main shaft directly connected to the driving means 24, which is rotatably supported by the frame 23. Reference numeral 26 denotes an output lever fixed to the main shaft 25 and having an abutting portion 26a, which drives the movable contact 21 via the link mechanism 22. The output lever 26 rotates counterclockwise in the drawing to open the path between the contacts 20 and 21, and rotates clockwise to close the path. Reference numeral 27 denotes a pin projecting from the output lever 26.

Reference numeral 28 denotes a roller which is rotatably attached to the output lever 26. Reference numeral 29 denotes an engagement portion 29a, 29b, 29 which is rotatably supported by the frame 23 by a shaft 30.
With the latch having c, the engaging portion 29b is engaged with the pin 27 so as to prevent the output lever 26 from rotating counterclockwise. When the path between the two contacts 20 and 21 is opened, the engaging portion 29c of the latch 29 comes into contact with the contact portion 26a of the output lever 26 to rotate the latch 29 counterclockwise by a predetermined angle. 31 is an engagement pin fixed to the latch 29, 32 is a spring which has pressed the latch 29 clockwise, 3
Reference numeral 3 denotes a trigger rotatably supported on the frame 23 by a shaft 34. One end of the trigger is engaged with the engagement pin 31 to prevent the latch 29 from rotating counterclockwise. Reference numeral 35 denotes a spring, which presses the trigger 33 so as to apply a counterclockwise rotating force to the trigger 33 as shown. The holding means 36 is composed of 29 to 35. Reference numeral 37 denotes an opening electromagnet attached to the frame 23. The opening electromagnet drives the plunger 36a rightward in the figure by an opening signal to release the engagement between the trigger 33 and the pin 31.

Reference numeral 38 denotes a closing drive means for outputting a driving force, in which a clockwise driving force shown in the figure is stored. Reference numeral 39 denotes a closing spindle directly connected to the driving means 38,
Is rotatably supported. 40 is a lever fixed to the main shaft 39, 41 is a link having one end rotatably connected to the lever 40 by a shaft 42, and the other end is rotatably connected to a later-described large gear 47 via a shaft 43. ing. A cam shaft 44 is rotatably supported by the frame 23. 4
Reference numeral 5 denotes a cam fixed to the camshaft 44.
In a state in which the distance between the two contacts 20 and 21 is open, the camshaft 44 is rotated clockwise to contact the roller 28 and rotate the output lever 26 clockwise.

Reference numeral 46 denotes a small gear which is rotated by a power storage means (not shown), and is rotatably supported by the frame 23. A large gear 47 is fixed to the camshaft 44 and meshes with the small gear 46. The large gear 47 has a toothless portion 47a so as to be disengaged from the small gear 46 when the driving means 38 is in a state of being charged. 48 is a pin fixed to the cam 45, 49 is a shaft 50
By means of a latch rotatably supported on the frame 23 by
In response to a clockwise driving force transmitted from the driving means 38 to the camshaft 44, the shaft 43 has an engaging portion 49a which is engaged with the pin 48 at a position beyond the dead center. Reference numeral 51 denotes a spring that presses a latch 49 so as to apply a clockwise driving force. Reference numeral 52 denotes an engagement portion 52 that is rotatably supported by a shaft 53 on the frame 23.
When the engaging portion 49a of the latch 49 is engaged with the pin 48 with the trigger having the a, one end is engaged with the pin 54 fixed to the latch 49, and the latch 49 is rotated counterclockwise. Has been blocked. Reference numeral 55 denotes a spring, which presses the trigger 52 so as to apply a counterclockwise turning force as shown. The holding means 57 is constituted by 49 to 56.

Reference numeral 58 denotes a latch rotatably supported on the frame 23 by a shaft 59. The latch 58 engages an engaging portion 58a which is disengaged from the engaging portion 52a of the trigger 52 when rotated clockwise by a predetermined angle. It is provided at one end, and the engaging portion 58b at the other end is engaged with the engaging portion 29a of the latch 29. 60 is a spring,
The latch 58 is pressed so that clockwise turning power is applied. The interlocking means 61 is constituted by 58 to 60. Reference numeral 62 denotes a closing electromagnet attached to the frame 23. When the engagement between the engaging portion 52a of the trigger 52 and the engaging portion 58a of the interlocking means 61 is released, the closing signal causes the plunger 62a to move to the right in the drawing. To trigger 52
Is pressed, and the trigger 52 is rotated clockwise to release the engagement with the pin 54.

Next, from the closed state of FIG.
A description will be given of an opening operation for opening one interval. In FIG. 1, when the opening electromagnet 37 is excited by an opening signal, the plunger 37a is driven rightward in the figure to trigger 3
3 is rotated clockwise. As a result, the engagement between the trigger 33 and the pin 31 is released, and the latch 29 is
7 rotates counterclockwise about the shaft 30 by the reaction force. As a result, the output lever 26 is rotated counterclockwise by the driving force of the driving means 24, and
In the interval between the two, the state shifts to the open state as shown in FIG. At this time, the engagement portion 58b of the interlocking means 61 rotates clockwise in conjunction with the engagement portion 29a of the holding means 36 in an engaged state. During the transition from the closed state to the open state, the engaging portion 58a of the interlocking means 61 is
a and rotate clockwise while engaging with both contacts 20, 2
The two engaging portions 52a, 58
The engagement between a is released.

Next, the operation from the open state to the closed state in FIG. 2 will be described. In FIG. 2, when the closing electromagnet 62 is excited by a closing signal, the plunger 62a is driven rightward in the figure to rotate the trigger 52 clockwise.
As a result, the engagement between the trigger 52 and the pin 54 is released, and the latch 49 of the holding means 57 is rotated counterclockwise by the reaction force from the pin 48. The driving force of the driving means 38 is applied to the cam 45 by the lever 40, the link 41, and the large gear 4.
7 and the main shaft 44, the cam 45
Abuts on the roller 28 to rotate the output lever 26 clockwise to close both contacts 20 and 21. At this time,
The driving means 24 is rotated clockwise to accumulate the driving force for opening, and the trigger 33 and the engaging pin 31 are engaged and held by the holding means 36. FIG. 3 shows a state in which the closing operation has been completed.

Next, the operation of accumulating the driving force of the driving means 38 will be described. In FIG. 3, energy storage means (not shown)
When the small gear 46 is rotated in the counterclockwise direction, the driving means 38 is rotated in the clockwise direction via the large gear 47, and the driving force for closing is accumulated. Then, at a position where the direction of the tensile load of the link 41 exceeds a dead point intersecting with the center of the cam shaft 44 as shown in FIG.
A clockwise turning force is given by the driving force of No. 8. Here, as shown in FIG. 1, the small gear 46 corresponds to the toothless portion 47a of the large gear 47, so that the gears 46 and 47 are disengaged from each other. The large gear 4 is driven by the driving force of the driving means 38.
7 is rotated clockwise, the engaging portion 49a of the holding means 57 and the pin 48 are engaged with each other.
7.

As described above, the interlocking means 61 interlocking with the holding means 36 is engaged with the holding means 57 until the opening operation between the contacts 20 and 21 is completed, and the holding operation of the holding means 57 is released. To prevent Therefore, during the transition from the closed state to the open state, the driving force of the driving means 38 is not output even if the electromagnet 62 is excited. Then, after the engagement between the interlocking means 61 and the holding means 57 is released in a state where the opening operation between the contacts 20 and 21 is completed, the holding operation of the holding means 57 by the closing signal is released. Since the driving force of the driving means 38 is output and the contact between the two contacts 20 and 21 is closed, it is possible to prevent an unnecessary closing operation from being performed even if the opening operation is not completed.

Embodiment 2 FIG. 4 is a configuration diagram illustrating a closed state according to the second embodiment. In FIG. 4, 20 to 28,
37 to 57 and 62 are the same as those in the first embodiment. A latch 63 is rotatably supported on the frame 23 by a shaft 64 and has engaging portions 63a, 63b, 63c. The latch 63 engages with the pin 27 so as to prevent the output lever 26 from rotating counterclockwise. The portion 62b is engaged. When the path between the contacts 20 and 21 is opened, the contact portion 26a of the output lever 26 comes into contact with the engaging portion 62c of the latch 62 to rotate the latch 63 counterclockwise by a predetermined angle. During this time, the engagement between the two engaging portions 52a and 63a is maintained, and the latch 63 is rotated by a predetermined angle to rotate the two contacts 20 and 2a.
1 when the opening operation is completed.
The engagement between a and 63a is released. 65 is an engagement pin fixed to the latch 63, 66 is a spring that presses the latch 63 in the clockwise direction, 67 is a trigger rotatably supported on the frame 23 by a shaft 68, and one end is engaged with the engagement pin 65. The latch 63 is prevented from rotating counterclockwise.
A spring 69 presses the trigger 67 so as to apply a counterclockwise rotating force to the trigger 67 as shown. The holding means 70 is composed of 63 to 69.

Next, from the closed state of FIG.
The opening operation for opening the circuit between the 21 will be described. In FIG. 4, a counterclockwise driving force is applied to the output lever 26 by the driving unit 24 via the main shaft 25. When the electromagnet 37 is excited by the open circuit signal, the plunger 37
is driven rightward in the figure to rotate the trigger 67 clockwise. Therefore, the trigger 67 of the holding means 70 and the pin 6
Since the engagement with the pin 5 is released, the latch 63 is rotated counterclockwise about the shaft 64 by the reaction force from the pin 27. As a result, the output lever 26 is rotated counterclockwise by the driving force of the driving means 24, and the state between the two contacts 20 and 21 is shifted to the open state as shown in FIG. During the transition from the closed state to the open state, the engaging portion 63a of the holding means 70 rotates a predetermined angle in the counterclockwise direction while engaging with the engaging portion 52a of the holding means 57. , 21
The two engaging portions 52a, 63a
The engagement between them is released.

As described above, the holding means 70 engages with the holding means 57 until the opening operation between the contacts 20 and 21 is completed, thereby preventing the holding operation of the holding means 57 from being released. Therefore, during the transition from the closed state to the open state, the driving force of the driving means 38 is not output even if the electromagnet 62 is excited. And both contacts 20, 2
In the state where the opening operation between the two is completed, both holding means 57 and 70
Is released, and the holding operation of the holding means 57 by the closing signal is released, so that the driving force of the driving means 38 is output and the two contacts 20 and 21 are closed, so that the opening operation is completed. Unnecessary closing operation can be prevented from being performed even if it is not performed.

[0022]

According to the first aspect of the present invention, the interlocking means interlocking with the first holding means engages with the second holding means until the opening operation is completed, and the holding operation of the second holding means is stopped. The engagement between the interlocking means and the second holding means is released when the opening operation is completed, and the holding operation of the second holding means by the closing signal is released. Accordingly, it is possible to prevent the closing operation from being performed during the opening operation, so that the reliability can be improved.

According to the second aspect of the present invention, the second holding means is engaged with the second holding means to prevent the holding operation of the second holding means from being released until the opening operation is completed. In the state where the opening operation is completed, the engagement of the two holding units is released, and the holding operation of the second holding unit by the closing signal is released, so that the closing operation is performed during the opening operation. Since it can be prevented, reliability can be improved.

[Brief description of the drawings]

FIG. 1 is a configuration diagram illustrating a closed state according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing an open circuit state of FIG. 1;

FIG. 3 is an explanatory diagram showing a state in which the closing drive force of FIG. 1 is released.

FIG. 4 is a configuration diagram illustrating a closed state according to Embodiment 2 of the present invention;

FIG. 5 is an explanatory diagram showing an open state of FIG. 4;

FIG. 6 is a configuration diagram showing a closed state of a conventional switching device.

FIG. 7 is an explanatory diagram showing an open state of FIG. 6;

8 is an explanatory diagram showing a state in which the closing drive force of FIG. 6 is released.

[Explanation of symbols]

20 fixed contact, 21 movable contact, 24, 38 driving means, 36, 57, 70 holding means, 61 interlocking means.

Claims (2)

[Claims] A driving force of a first driving means is held by a first holding means, a holding operation of the first holding means is released by an open circuit signal, and a movable contact is released by the first driving means. The circuit is opened from the fixed contact, the driving force of the second driving means is held by the second holding means, the holding operation of the second holding means is released by the closing signal, and the distance between the two contacts is reduced. 2
The interlocking means interlocking with the first holding means engages with the second holding means until the opening operation between the two contacts is completed. The holding operation of the second holding means is prevented from being released, and the engagement between the interlocking means and the second holding means is released in a state where the opening operation between the two contacts is completed, and the closed circuit is opened. An opening / closing device, wherein the holding operation of the second holding means can be released by a signal. 2. The driving force of the first driving means is held by the first holding means, the holding operation of the first holding means is released by an open circuit signal, and the movable contact is released by the first driving means. The circuit is opened from the fixed contact, the driving force of the second driving means is held by the second holding means, the holding operation of the second holding means is released by the closing signal, and the distance between the two contacts is reduced. 2
In the opening / closing device that is closed by the driving means, the first operation is performed until the opening operation between the two contacts is completed.
Prevents the holding operation of the second holding means from being released by the engagement of the holding means with the second holding means. Wherein the engagement of the second holding means is released, and the holding operation of the second holding means by the closing signal is released.