JPH081777B2 - 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 operating device, and more particularly to a switch operating device such as a circuit breaker in which an opening / closing mechanism is operated by a lever.

[0002]

2. Description of the Related Art A circuit breaker is provided with a trip function that automatically shuts off the circuit in order to protect the circuit from accidental current such as overcurrent, in addition to the function of opening and closing the circuit.

FIG. 6 is an external side view showing a closed state of a general circuit breaker, and its internal structure is schematically shown. 6, a circuit breaker 1 includes a fixed contact 3 fixed to a fixed contact 2 also serving as a power supply side terminal, a movable contact 6 fixed to a movable contact 5 rotatably supported by a crossbar 4,
It includes a main circuit conductive portion that is connected between one end of the movable contact 6 and the load-side terminal 7 and that has a trip element 9 that operates a trip mechanism 8 that is made of a bimetal or an electromagnet. Further, the circuit breaker 1 has a lever type handle 11 rotatably supported by a fixed shaft 10, one end of which is rotatably supported by a fixed shaft 26, and the other end of which is operated by a tripping mechanism 8. Trip lever 13 provided so as to be freely engageable with the claw 12
And a first link 14 whose one end is rotatably connected to the movable contact 5, and a first connecting point 15 and a second connecting point 16 between the other end of the first link 14 and the trip lever 13, respectively. Second link 17 rotatably connected at
And a toggle link type opening / closing mechanism portion including an operating spring 18 provided between the lever type handle 11 and the first connecting point 15 is housed in an insulating container.

The lever type handle 11 is stopped at different positions as shown in FIG. 6 depending on the open / closed / trip state of the circuit breaker 1. In the closed state of FIG. 6, the first link 14 and the second link 17 are connected in a substantially straight line, and the first connection point 15 is biased leftward by the operating spring 18 and stopped by a stopper (not shown). When the lever type handle 11 is rotated clockwise from this state, the toggle link type opening / closing mechanism section is inverted. That is, the operation spring 18 rotates clockwise around the first connection point 15, the line of action thereof exceeds the second connection point 16, and the first connection point 15 is moved by the spring force of the operation spring 18 to the second connection point 15. Rotate counterclockwise about 16 as the center of rotation,
The first link 14 and the second link 17 have an inverted "V" shape. The movable contact 5 is connected to the crossbar 4 via the first link 14.
The contact is opened by rotating in the clockwise direction about the rotation center, and the lever-type handle 11 automatically moves to the open position and stops. The closing operation is the opposite.

Further, when the trip mechanism 8 operates due to an overcurrent flowing in the closed circuit state, the trip mechanism 8 has the pawl 12
And trip lever 13 are disengaged, and trip lever 1
3 rotates in the counterclockwise direction by the spring force of the operation spring 18 together with the second connecting point 16, and the lever type handle 1 is relatively moved.
1 rotates clockwise, and the operation spring 18 moves the second connecting point 16
To the right, the first connecting point 15 moves to the right, the movable contact 5 rotates clockwise to open the contact, and the lever-type handle 11 moves between the open position and the closed position. Stop at trip position.

In order to change from the trip state to the closed state, the lever type handle 11 is once moved in the open position direction, and the claw 12 and the trip lever 13 are reset, and then the closed operation is performed. . Such opening / closing operation of the circuit breaker may be performed not only by operating the handle directly by hand, but also by operating an operating device for operating the handle on the surface of the circuit breaker to operate manually or electrically. .

A conventional example of a type in which a circuit breaker is installed in a switchboard and the operation portion of the operating device operated by hand is operated by rotating on the surface of the switchboard or the like is shown in FIGS.
Is shown in.

FIG. 7 is a side view of the circuit breaker in a closed state, and FIG. 8 is a plan view taken along line XX of FIG. 7 and 8, the lever type handle 1 of the circuit breaker 1
A mounting plate 100 is fixed to the surface from which 1 projects, and an operation handle 101 is rotatably mounted on the mounting plate 100. The operation handle 101 includes the operation handle 1
The engagement pin 102 is provided at a position away from the center of rotation of 01.

On the other hand, an operation plate 103 having a U-shaped cross section is rotatably supported by the mounting plate 100. Operation board 1
The end of one surface of the opposing surface of 03 is formed in a "U" shape, and the first roller 104 and the second roller 105 are rotatably supported by the respective leg portions. Roller 104
The lever type handle 11 is held between the second roller 105 and the second roller 105. A long hole 103a is formed on the other surface of the operation plate 103 which faces the engagement pin 1, and the engagement pin 1 is formed in the long hole 103a.
02 is engaged.

Further, the lever type handle 11 and the operation plate 1
03 and the operation handle 101 are linked,
In order to display the open / closed state or the tripped state of the circuit breaker 1, the open / closed / tripped open / closed display plate 106 corresponds to the rotation angle of the operation handle 101 corresponding to the position of the lever-type handle 11, and the switchboard. The operating handle 101 is provided with a pointing groove 101a for pointing them.

The circuit opening operation of the conventional example configured as described above will be described. When the operation handle 101 is rotated counterclockwise in FIG. 8, the engagement pin 102 is rotated to move along one edge of the elongated hole 103a and the operation plate 103 is moved.
Press to rotate clockwise. At this time, in FIG. 7, the lever type handle 1
When the circuit breaker 1 is pushed and rotated clockwise to reverse the toggle link opening / closing mechanism, the lever type handle 1
1 moves to the open position. The closing operation is the opposite.

[0012]

The circuit breakers shown in FIGS. 6 to 11 have the following problems. As a first problem, FIG. 9 is a view for explaining a state in which the first roller 104 is acting on the lever type handle 11 during the opening operation, and the operation handle 101
Most of the operating force F transmitted from the to the first roller 104 acts to rotate the lever-type handle 11.

However, in the initial stage of the opening operation shown in FIG. 10, of the operating force F, the acting force F2 acting to rotate the lever type handle 11 is the lever type handle 11 at the action point of the first roller 104. The tangential component of the rotation locus of is, and the operating force is not used effectively,
Requires a large amount of operating force. This is the same in the initial stage of the circuit closing operation.

As a second problem, since the axis of the operation plate 103 needs to be provided at a position apart from the axis of the operation handle 101, the device becomes large.

As a third problem, in FIG. 8, the lever type handle 11 moves vertically up and down, whereas the operation plate 103 rotates, so that the first roller 104 or the second roller 105 is being opened / closed. Is a lever type handle 11
In order to continue to engage with the working surface of the lever-shaped handle 11, the first roller 104 and the second roller 105 must face the working surface of the lever-shaped handle 11 at a predetermined angle θ. That is, the gap G between the first roller 104 and the second roller 105 needs to be larger than the thickness T of the lever-type handle 11. When this circuit breaker 1 trips,
As shown in FIG. 5, the operation plate 103 has a (GT) play with respect to the lever-shaped handle 11. With this play,
The position of the indication groove 101a of the operation handle 101 becomes indefinite, the display on the open / close display plate 106 becomes unstable, and the operator is confused. In order to reduce this play (GT), the distance between the axis of the operation plate 103 and the axis of the operation handle 101 may be increased, but the operation device becomes larger.

Therefore, a main object of the present invention is to solve the above-mentioned problems, to provide a small-sized switch operating device capable of performing a small operation, displaying a reliable status. is there.

[0017]

SUMMARY OF THE INVENTION The present invention provides a lever holding means for holding a lever and a lever holding means in a switch operating device for operating a switch lever in which contacts are brought into and out of contact by operating the lever. Guide means for guiding the flat surface of the lever to move in an arcuate path,
An operating means for rotating on a plane orthogonal to the plane on which the lever rotates, the operating means is provided with an engaging means at a position distant from the center of rotation of the operating means, and the lever holding means is The engaging edge is provided so that the engaging means moves while pressing the lever holding means with the rotation of the operating means.

[0018]

In the operating device for a switch according to the present invention, the plane on which the lever of the switch for opening and closing the contact rotates is orthogonal to the plane on which the operating means of the operating device rotates. The lever holding means can move the rotation plane of the lever in an arc shape in the rotation direction of the lever by the guide means. The lever holding means moves along the guide means by moving the engaging means that rotates when the operating means rotates along the engaging edge of the lever holding means while pressing the engaging edge of the lever holding means. . The movement of the lever holding means is a linear movement when viewed from the rotation surface of the operation means, and an arc-shaped movement when viewed from the rotation surface of the lever, which is a movement approximate or coincident with the rotation of the lever.

Therefore, it is not necessary to provide a rotation shaft for the lever holding means. Since there is little change in the angle at which the lever holding means acts on the lever during the opening / closing operation, the change in the force acting to rotate the lever is small and the efficiency is high. During the opening / closing operation, the lever holding means does not move much at the portion holding the lever and the distance between the lever and the lever holding means can be reduced, so that the play of the lever holding means at the trip position of the switch having the trip position can be reduced.

[0020]

1 to 5 are views showing an embodiment of a switch operating device according to the present invention. In particular, FIG. 1 is a side view of a circuit breaker in a closed state, and FIG. FIG. 3 is an exploded perspective view of the circuit breaker in a closed state.

The operating device of this embodiment comprises a pair of mounting plates 1
9, insulating base 20, operating handle 2 as operating means
1, engagement pin attachment plate 22, engagement pin 2 as an engagement means
3, operation plate 24 and guide plate 2 which are lever operation means
Have 5. The pair of mounting plates 19 are fixed to the surface of the circuit breaker 1 so as to face each other, and each has a screw hole 19a. The insulating base 20 is a synthetic resin molded product, and a shaft hole 20a is formed in the central portion thereof so that the shaft hole 20a is located above the lever handle 11 at a substantially intermediate position between the open position and the closed position. The holes 20b formed on the side surfaces of the mounting plate 19 are fixed to the screw holes 19a of the mounting plate 19 with screws.

The operation handle 21 has a knob 21a,
A cylindrical shaft portion 21b is formed in the lower portion, and the operation handle 21
The cylindrical shaft portion 21b is attached to the insulating base 20 so that the
It is fitted into the shaft hole 20a. At one end of the knob 21a, an instruction groove 21c for instructing the display of a decorative plate 27 of the insulating base 20 described later is formed.

The engagement pin mounting plate 22 is provided on the operation handle 21.
At the same time, in the hole 22a so as to sandwich the insulating base 20, it is fixed to the end of the cylindrical shaft portion 21b by a screw,
It is rotatable with the operation handle 21. An engagement pin 23 is provided on the engagement pin attachment plate 22 at a position away from the axis of the operation handle 21.

The guide plate 25 has a U-shaped cross section, and the insulating base 20 is screwed in the hole 25b so that the opposite surface thereof is parallel to the rotation of the lever-shaped handle 11.
Fixed to. When the operating device is attached to the circuit breaker 1, arcuate guide grooves 25a centering on the rotation center of the lever-shaped handle 11 are formed on the respective opposing surfaces. The operation plate 24 is formed in a "U" shape, and a "U" -shaped leg portion 24a for holding the lever-shaped handle 11 is formed on one side of the facing surface and an engaging edge is formed on the other side. A guide hole 24c is formed so as to be merged with a certain long hole 24b and one side of the guide groove 25a. When the lever-shaped handle 11 is held by the "U" -shaped leg portion 24a, the elongated hole 24b has a longitudinal portion in a direction perpendicular to the rotation direction of the lever-shaped handle 11 and can be engaged with the engagement pin 23. Chosen to fit The operation plate 24 has a pair of guide pins 2 that engage with the other side of the guide groove 25a provided in the back portion thereof.
4d and the above-mentioned guide leg 24c, guide groove 25
It can slide along a.

On the surface of the switchboard, there is provided a decorative plate 27 having indications of "closed", "trip" and "open" for indicating the state of the circuit breaker 1.

Next, the operation of the operating device constructed as described above will be explained. In the closed state of FIGS. 1 to 3, the operation plate 24 holds the lever-shaped handle 11 in the closed position at the “U” -shaped leg portion 24a, and the engagement pin 23 is different from the elongated hole 24b in FIG. The knob 21a is engaged near its right end, and the indicating groove 21c of the knob 21a indicates "closed".

In this state, when the operation handle 21 is rotated counterclockwise in FIG. 2, the engagement pin 23 is rotated around the axis of the operation handle 21, and the engagement pin 23 is formed in the long hole 24b. While moving along one edge of the longitudinal edge, the operation plate 24 is pressed and moved in the opening direction along the guide groove 25a. At this time, the operation plate 24 rotates the lever type handle 11 clockwise in FIG. 1, the toggle link opening / closing mechanism of the circuit breaker 1 is reversed, the lever type handle 11 reaches the open position, and the open operation is completed. Then Fig. 5
As shown in the exploded perspective view of FIG.
1c comes to indicate the display of "open" in FIG. That is, the rotational movement of the operation handle 21 is converted into the rotational movement of the plane orthogonal to the plane in which the operation handle 21 is rotated. The closing operation is the opposite.

FIG. 4 is a diagram showing the locus of rotation of the lever-type handle 11 during the opening / closing operation. Since the center of rotation of the lever-type handle 11 and the center of movement of the operation plate 24 coincide with each other in the opening / closing operation. The operation plate 24 at the open position, the closed position, and the intermediate position is the lever type handle 1.
The position and angle acting on 1 do not change. For this reason,
The distance between the "U" -shaped leg portions 24a may be substantially the same as the thickness of the lever-shaped handle 11 so that no gap is generated.
Therefore, even in the trip position, the operation handle 21
Since no play occurs, the indicator groove 21c of the knob 21a accurately indicates the trip display position. Further, since the direction in which the “U” -shaped leg portion 24 a acts on the lever-shaped handle 11 is the tangential direction of the rotation locus circle of the lever-shaped handle 11,
The operating force of the operating handle 21 efficiently acts on the lever-type handle 11, and opening, closing and resetting can be performed with a small operating force.

According to the present invention, as in the above-described embodiment, the rotation center of the lever type handle 11 and the arc-shaped guide groove 25 are provided.
The centers of a do not necessarily match, but it is most preferable that they match, and the closer to the matched state, the more preferable. The guide groove 25a does not necessarily have to be arcuate, and may be formed in an arcuate shape such that the rotation center of the lever-type handle 11 is located inside thereof.

This operating device also has the advantage of being able to adjust the operating angle of the operating handle during opening and closing operations. For example, the lever-shaped handle 11 at the position where the “U” -shaped leg portion 24 a of the operation plate holds the lever-shaped handle 11.
If this operating device is attached to a switch whose opening and closing positions are larger than those of a standard switch, the handle holding means 24 has a large movement amount, so that the rotation angle of the operating handle becomes large and the open / close display is displayed. Does not match the indicator groove 21c of the knob 21a. In this case, when the guide plate 25 is attached to the insulating base 20 via an appropriate spacer, the position where the lever-shaped handle 11 of the "U" -shaped leg portion 24a of the operation plate is held is close to the rotation center, that is, the base. Become. Therefore, the distance between the open position and the closed position of the lever-type handle 11 at the holding position becomes small, and the displays match.

Furthermore, unlike the conventional example, the operation plate 24 is not axially supported but is slid linearly in the rotation direction of the lever type handle 11, so that the operation device can be downsized.

In the above embodiment, the manual operation handle 21 is used as the operation means, but the operation handle 21 may be an electrically operated type driven by a motor or an electromagnet.

Although the circuit breaker has been described in the above embodiment, the present invention can be applied to a switch without a trip position. Furthermore, this operating device may be configured to be built in the inside of the switch including the circuit breaker.

[0034]

As described above, according to the present invention, since the holding means of the lever type handle of the switch operating device is adapted to move along the arcuate locus on the rotating surface of the lever type handle, the lever type handle is retained. The movement is similar to the movement of the handle, the operating force effectively acts on the opening and closing of the circuit breaker, and it can be operated with a small force, and the play of the lever type handle and its holding means can be set to a small amount, so especially For switches that have "trip" positions in addition to "open" and "closed" positions, the display can be assured. Further, since the holding means of the lever type handle moves along the guide means, it is not necessary to provide a fulcrum, and the size can be reduced. Further, the rotation angle of the operating means can be easily changed only by changing the mounting position of the guide means. That is, the display angle can be changed.

[Brief description of drawings]

FIG. 1 is a side view showing a state in which an operating device according to an embodiment of the present invention is attached to a circuit breaker in a closed state.

FIG. 2 is a plan view of FIG.

FIG. 3 is an exploded perspective view of FIG.

FIG. 4 is a side view showing an opening / closing operation of the circuit breaker by the operation device according to the embodiment of the present invention.

FIG. 5 is an exploded perspective view showing a state in which the operating device according to the embodiment of the present invention is attached to a circuit breaker in an open circuit state.

FIG. 6 is a side view of a conventional circuit breaker.

FIG. 7 is a side view showing a state in which a conventional operating device is attached to a circuit breaker in a closed state.

FIG. 8 is a plan view seen from XX in FIG. 7.

FIG. 9 is a side view showing a circuit breaker during a closing operation by a conventional operating device.

FIG. 10 is a view showing a side surface of a conventional circuit breaker at an initial stage of a circuit opening operation by an operating device.

FIG. 11 is a plan view of a conventional operating device with a circuit breaker in a trip state.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Circuit breaker 10 Fixed shaft 11 Lever-type handle 19 Mounting plate 20 Insulating base 20a Shaft hole 21 Operation handle 21a Knob 21b Cylindrical shaft portion 21c Indicator groove 22 Engaging pin mounting plate 23 Engaging pin 24 Operating plate 24a "U" Character leg 24b Long hole 24c Guide leg 24d Guide pin 25 Guide plate 25a Guide groove 27 Decorative plate

Claims (1)

[Claims] 1. A switch operating device for operating the lever of a switch, wherein contacts are brought into and out of contact by operating a lever, and a lever holding means for holding the lever, and the lever holding means for rotating the lever. The operating means includes a guide means for guiding the moving plane so as to move along an arcuate locus, and an operating means for rotating on a plane orthogonal to the plane on which the lever rotates. Engaging means is provided at a position away from the center of motion, and the lever holding means is provided with the rotation of the operating means.
An operating device for a switch, wherein the engaging means is provided with an engaging edge that moves while pressing the lever holding means.