JP2714497B2 - Switchgear operating device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch used for electric power, and more particularly to a means for improving the reliability of an operating device thereof.

[0002]

2. Description of the Related Art FIGS. 5 and 6 show, for example, Japanese Utility Model Publication No. 56-46.
FIG. 5 shows a conventional switch operating device disclosed in Japanese Patent Publication No. 292/292 or the like, and FIG. 5 is a diagram showing a cut-off state of a conventional switch operating device, and FIG. 6 is a diagram showing a conventional switch operating device. It is a figure showing an input state.

In the drawing, reference numeral 1 denotes an operating rod connected to a contact of a circuit breaker (not shown). The operating rod 1 has a pin 2 for engaging with a latch 3 and is normally urged in a closing direction indicated by an arrow A. When a cut-off signal is input, the contact signal is moved in the direction indicated by arrow B to open the contact. 3 is an operation stick 1
The roller 3 is rotatably mounted on the upper part of the latch 3 so as to be rotatable.
Rotation is performed in the direction 1 or C2. The operation rod 1 is constantly pressed against the operation rod 1 by the resilient biasing action of the spring 6, and the rotation in the direction C1 is restricted by the stopper 7.

Reference numeral 8 denotes a rotatable trigger piece disposed adjacent to the latch 3. The trigger piece 8 has an engaging portion 8a for engaging the roller 4 at one end and a rod 13 to be described later at the other end. Engaging portions 8b to be engaged are formed, respectively, and are adapted to rotate in the vertical direction about the pin 9, and are normally in
Urged downward. Further, downward rotation is restricted by the stopper 11a, and upward rotation is restricted by the stopper 11b. Reference numeral 12 denotes an electromagnet which is energized when a circuit breaker closing signal is input.
When the lever 2 is urged, the rod 13 protrudes and moves in the direction of arrow D, and the tip of the rod 13 engages with the engaging portion 8b of the trigger piece 8.

Next, the operation of shifting from the closed state to the cutoff state shown in FIG. 6 will be described. First, after the closing signal is lost, the electromagnet 12 is deenergized and the rod 13 is moved in the direction of arrow D, and when the cutoff signal is input, the operating rod 1 is moved in the direction of arrow B and the pin 2 is latched. The latch 3 is engaged with the pin 2 by the resilient biasing action of the ridge 6. Then, the trigger piece 8 which has been in contact with the upper part of the latch 3 is rotated downward by the elastic pressure urging action of the ridge 10, and the engaging portion 8a collides with the roller 4. This state is the cut-off state in FIG. 5, in which a force in the direction of arrow A acts on the operating rod 1,
The operation rod 1 is locked by the engagement between the pin 2 and the latch 3, and the state is maintained.

Next, the operation when the circuit breaker is closed will be described. When the circuit breaker is shut off, the operating device is held in the state shown in FIG. 5, and the operating rod 1 is constantly pulled in the direction of arrow A. In this state, when a closing signal is input, the electromagnet 12 is urged to move the rod 13 to protrude in the direction of arrow D. , The engaging portion 8 a of the trigger piece 8 is disengaged from the roller 4 of the latch 3. Then, the latch 3 rotates in the direction of arrow C1 and comes off the pin 2,
The latch 3 collides with the stopper 7 while compressing the ridge 6. Further, with the release of the engagement between the pin 2 and the latch 3, the operating rod 1 moves in the direction of arrow A to insert a contact, and shifts to the inserted state of FIG.

[0007]

The conventional switch operating device is constructed as described above, and releases the large engaging force between the pin 2 and the latch 3 with a small force based on the bias of the electromagnet 12 to perform the closing operation. Since it is performed reliably, the moment arm g (see FIG. 7) acting on the trigger piece 8 determined by the roller 4 of the latch 3 and the engaging portion 8a of the trigger piece 8 has a small size.
Moreover, it was necessary to design with high precision.

That is, in order to accurately design the moment arm g shown in FIG. 7, the mounting dimension a of the latch 3 and the trigger piece 8, the mounting dimension b of the trigger piece 8 and the stopper 11a,
The dimension c of the latch 3, the dimension d of the trigger piece, the mounting hole dimension φe of the stopper 11 a, and the pin diameter φf of the stopper 11 a need to be machined with high precision. In addition, variations in the moment arm g caused by many of these dimensional tolerances have a problem that variations in operation time and operation reliability are adversely affected.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and an object of the present invention is to provide a switch operating device in which a moment arm is accurately maintained and operation reliability is improved. Furthermore, it aims at reducing the number of precision processing locations for this purpose.

[0010]

According to the present invention, in order to achieve the above objects, the present invention is connected to a contact of a switch and is normally urged in a closing direction of the contact, and is urged in a direction opposite to the closing direction when shut off. An operating rod which is movable in the axial direction, a latch which is rotatably supported and is urged to be pressed in a direction to always engage with the operating rod, and which engages with a latch roller when the contact is cut off to operate. A trigger piece for holding the rod and the latch in an engaged state, and furthermore, engaging the trigger piece with the roller.
Of the trigger piece with respect to the latch
The stopper that limits the engagement portion of the roller of the trigger piece
Is provided adjacent to the .

Further, the stopper is characterized in that the length from the end face of the engaging portion of the trigger piece to the stopper and the length of the stopper are longer than the radius of the latch roller. I have.

[0012]

According to the present invention, when the latch and the trigger piece are engaged, the stopper portion of the trigger piece contacts the roller of the latch to limit the operation of the trigger piece.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to one embodiment shown in FIGS. 1 to 3. In the drawings, reference numeral 1 denotes an operating rod connected to a contact of a circuit breaker (not shown). The pin 2 is engaged with the pin 3 and is normally urged in a closing direction indicated by an arrow A, and has a function of opening the contact by moving in a direction indicated by an arrow B when a cutoff signal is input. Reference numeral 3 denotes a rotatable latch disposed adjacent to the operation rod 1.
A roller 4 is rotatably mounted on the upper part and is adapted to rotate in the C1 or C2 direction around the pin 5 and is constantly pressed against the operating rod 1 by the elastic pressing force of the spring 6. , C1 is restricted by the stopper 7.

Reference numeral 8 denotes a rotatable trigger piece disposed adjacent to the latch 3. The trigger piece 8 has an engaging portion 8a which engages with the roller 4 at one end and a rod 13 described later at the other end. Engaging portions 8b to be engaged are formed, respectively, and are adapted to rotate in the vertical direction about the pin 9, and are normally in
Urged downward. In addition, the upward rotation is restricted by the stopper 11b. 12
Is an electromagnet that is energized when a circuit breaker closing signal is input. When the electromagnet 12 is energized, the rod 13 protrudes in the direction of arrow D and its tip is engaged with the engaging portion 8b of the trigger piece 8. Are adapted.

Reference numeral 14 denotes a stopper according to the present invention provided at one end of the trigger piece. The stopper 14 comes into contact with the roller 4 at a surface perpendicular to the engaging portion 8a of the trigger piece 8 so that the trigger piece can be moved. 8 has a function of restricting the counterclockwise rotation of the motor 8. As shown in FIG. 3, the dimension of the stopper portion 14 is j, the radius of the roller 4 is j, the engagement portion 8a of the trigger piece 8 is
Assuming that the dimension up to the stopper portion 14 is k and the length of the stopper portion 14 is l, the relationship is k> j, l> i.

Next, the operation will be described. First, the operation when the circuit breaker is closed will be described. In FIG. 1, the operating rod 1 is always pulled in the direction shown by the arrow A. Therefore, the operating rod 1 attempts to move in the direction of the arrow A, but the latch 3 engages with the pin 2 of the operating rod 1, and the trigger piece 8 is pressed by the elastic force of the spring 10, and the stopper 14 is latched. The operation rod 1 is held at that position since the engagement portion 8a is in contact with the roller 4 and is locked at that position. In this state, the trigger piece 8 receives a counterclockwise rotation force due to the force received from the roller 4 and the force of the ridge 10, and the stopper portion 14 of the trigger piece 8 comes into contact with the roller 4, thereby causing the latch 3.
Of the roller 4 is held.

In this state, when a closing signal is inputted, the electromagnet 12 is urged to move the rod 13 to protrude in the direction of arrow D, and the tip of the rod 13 collides with the engaging portion 8b of the trigger piece 8 and When the trigger piece 8 is rotated in the direction E, the engaging portion 8a is disengaged from the roller 4. Then, the latch 3 becomes the arrow C _1.
The operation rod 1 moves in the direction of arrow A and moves off in the direction of arrow A to insert a contact, and shifts to the state shown in FIG.

Next, the operation of shifting from the closed state to the cutoff state shown in FIG. 2 will be described. First, after the closing signal is lost, the electromagnet 12 is deenergized and the rod 13 is moved in the direction indicated by the arrow D, and when the cutoff signal is input, the operating rod 1 is moved in the direction of the arrow B to latch the pin 2. The latch 3 is engaged with the pin 2 by the resilient biasing action of the ridge 6.
Then, the trigger piece 8 which has been in contact with the upper part of the latch 3 is rotated downward by the resilient urging action of the sprung 10 and the stopper portion 1 is rotated.
4 is brought into contact with the roller 4. This state is the cut-off state in FIG. 1.
The operation rod 1 is locked by the engagement of the latch 3 and the latch 3, and that state is maintained.

FIG. 3 shows the dimensional relationship of the moment arm g of the trigger piece 8 in FIG. 1. The moment arm g is formed by the center h of the trigger piece 8 and the dimension h of the stopper 14, the roller 4 of the latch 3. Is determined only by the radius dimension j.

According to the above configuration, since the stopper portion 14 for restricting the operation of the trigger piece 8 with respect to the latch 3 is provided at one end of the trigger piece 8 which engages with the roller 4 of the latch 3, the trigger piece 8 is provided. The number of precision machining locations related to the size of the moment arm g acting on the arm arm is reduced, and the variation of the moment arm g is extremely small, so that the operation reliability can be improved.

In the above embodiment, the stopper portion 14 is formed by a surface perpendicular to the engaging portion 8a, but may be formed by an oblique surface (angle θ °) as shown in FIG. . In this case, if k> j and l> j-jsinθ, the same effect as in the above embodiment can be obtained. Further, in the above embodiment, the operation device of the circuit breaker has been described. However, the same operation and effect as those of the above embodiment can be obtained with other switch operation devices.

[0022]

As described above, according to the present invention, the low end of the trigger piece is provided at one end of the trigger piece which engages with the latch roller.
Since the stopper is provided with a surface perpendicular to the engaging portion with the latch and restricts the movement of the trigger piece with respect to the latch, there are fewer precision machining places related to the size of the moment arm acting on the trigger piece. Since the variation of the moment arm is extremely small, there is an effect that the operation reliability can be improved.

[Brief description of the drawings]

FIG. 1 is a view showing a shut-off state of a switch operating device according to the present invention.

FIG. 2 is a view showing a closed state of the switch operating device according to the present invention.

FIG. 3 is a diagram showing a dimensional relationship of the switch operating device according to the present invention.

FIG. 4 is a view showing another embodiment of the switch operating device according to the present invention.

FIG. 5 is a diagram showing a shut-off state of a conventional switch operating device.

FIG. 6 is a diagram showing a conventional switch operating device in a closed state.

FIG. 7 is a view showing a dimensional relationship of a conventional switch operating device.

[Explanation of symbols] 1 operation stick, 3 latch, 4 rollers, 6 shots, 8 g
Rig piece, 8a engaging part, 12 electromagnet, 14 stopper
Department.

Claims (2)

(57) [Claims] 1. An operation rod which is connected to a contact of a switch and is normally urged in a closing direction of the contact, and is urged in a direction opposite to the closing direction when shut off, and is rotatable in an axial direction. A latch which is supported and normally urged in a direction to engage with the operation rod, and a trigger piece which engages with a roller of the latch when the contact is interrupted to hold the operation rod and the latch in an engaged state. The trigger piece
And a surface perpendicular to the engagement portion with the roller.
Stopper for restricting the movement of the trigger piece with respect to gold
Is provided adjacent to the engagement portion of the trigger piece with the roller.
Switch of the operating device, characterized by being kicked. 2. The stopper according to claim 1, wherein the length from the end face of the engaging portion of the trigger piece to the stopper is longer than the radius of the latch roller. The switch operating device according to claim 1.