JP2002017007A - Position notifying device for drawer type circuit breaker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To notify a test position by sound when the breaker body of a drawer type circuit breaker reaches the position. SOLUTION: When the breaker body moves from a disconnection position to the test one, a second lever 52 rotates clockwise in such a way that the contact point of a roller 56 with the second lever 52 moves on a first fitting edge 52a. When it reaches the test position, the point of application 52b of a spring 55 supersedes the line L passing the point of application of the spring of a first lever 51 and the centers of the rotations of this lever 51. At this instance, the lever 51 automatically rotates counterclockwise by the action of the spring 55 and hits a stepped shaft 17 to cause a sound to be emitted.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for audibly notifying that a breaker body of a draw-out type circuit breaker has reached a test position.

[0002]

2. Description of the Related Art A circuit breaker body of a draw-out type circuit breaker has a connection position where the drawer frame and the main circuit contacts of the circuit breaker body and the control circuit contacts are in contact with each other, and a connection position between the control circuit contacts. Can be moved linearly between a test position where only the contact comes into contact and a disconnect position where both contacts are disconnected. In the draw-out type circuit breaker, the lock mechanism automatically operates when the breaker main body reaches the respective position in the insertion or pull-out operation, and it is necessary to release the lock in order to further move the breaker main body. Some have a structure. However, there is a problem in that if the operator performs a moving operation without releasing the lock by mistake, the lock mechanism is broken.
Therefore, instead of omitting the lock mechanism, Japanese Patent Application Laid-Open No. H11-341623 discloses a position display mechanism that allows the position of the circuit breaker main body to be more clearly visually recognized.

FIG. 6 is a side view of a drawer-type circuit breaker equipped with such a position display mechanism, and shows a state in which the breaker body 1 is at a connection position in a drawer frame 2. That is, the main circuit side main circuit terminal 3 provided on the breaker main body 1
The main body side control circuit terminal 4 is in contact with the frame side main circuit terminal 5 and the frame side control circuit terminal 6 provided on the drawer frame 2 respectively. When the operating handle 18 of the drawer operating mechanism 7 is operated in this state, the breaker body 1 moves to the left,
The main circuit terminals are separated from each other to form a predetermined insulation distance and reach the test position where the control circuit terminals maintain contact. When the operation is further continued, the control circuit terminals are also separated from each other and reach the disconnection position where a predetermined insulation distance is formed. The pull-out operation mechanism 7 includes an operation handle 1
8, the amount of engagement between the screw 8 and the external thread 9 provided on the circuit breaker body 1 is changed because the screw breaker is provided on the drawer frame 2 and the circuit breaker body is moved by this change. Since this is not the main part of the present invention, its detailed description is omitted.

FIG. 7 is a partial view showing the position display mechanism 10 when the circuit breaker main body 1 is at the disconnection position, and its configuration and operation will be briefly described below. This position display mechanism 10
The substrate 1 attached to the bottom of the breaker body 1
1 and an operation plate 12 which is relatively slidable on the substrate 11. The operating plate 12 is urged downward (in the direction of the connection position) by a spring (not shown), and its distal end 12 a is pressed against a stopper 13 provided on the drawer frame 2. Therefore, even if the circuit breaker main body 1 moves between the connection position and the disconnection position, the operation plate 12 is not displaced.

A pointer 14 indicating the position of the breaker body 1
Is displaced to the left and right by rotating the pointer operating lever 15 having the small diameter portion of the stepped shaft 17 on the substrate 11 as the rotation axis. The pointer operation lever 15 is rotated by driving a pin 16 provided on the lever 15. Pin 1
6 is fitted in a guide groove 12b formed in the operation plate 12, and follows the movement of the circuit breaker body 1 to guide the groove 12b.
Move along b. That is, when the substrate 11 moves downward (toward the test position) together with the circuit breaker body 1, the operation plate 1
The pin 16 moves in the lower left direction along the second guide groove 12b, and the pointer operating lever 15 rotates clockwise. Due to this rotation, the pointer 14 is displaced rightward to indicate that it has reached the test position.

Further, when the circuit breaker main body 1 moves from the test position and becomes close to the connection position, the distal end portion 8a of the female screw 8 pushes up the operation expanding rod 24 on the substrate 11, and a stepped portion on the substrate 11 is formed. The first enlargement lever 20 having the small diameter portion of the shaft 19 as a rotation axis rotates counterclockwise. By this rotation, the pin 21 on the first magnifying lever 20 rotates the second magnifying lever 23 about the shaft 22 on the operation plate 12 as a rotation axis in a counterclockwise direction. At this time, the pin 16 is
The pin 16 moves to the left to fill the width of the guide groove and moves the pointer 14 largely to the right. That is, even when the movement of the breaker main body near the connection position is small, it can be clearly displayed that the circuit breaker body has reached the connection position. When the pull-out operation is performed from the connection position to the disconnection position, the operation is reverse to the above.

In this conventional draw-out type circuit breaker, the breaker body does not move any more when it reaches the connection position or disconnection position. However, when the circuit breaker is moved to the test position, the circuit breaker body continues to move when the operation of the handle 18 is continued even when the test position is reached. For this reason, a function of notifying by sound that the test position has been reached may be required as an auxiliary function of the visual display mechanism as described above. The prior art of such a sound notification device is disclosed in Japanese Patent Application No. 11-1457.
94 by the present applicant. FIG.
In this technique, a lever 31 having a roller 30 at a tip is provided on a substrate 11 and a rail 3 is provided on an operation plate 12.
2 is provided so that the roller 30 can move on the rail 32. In a portion corresponding to the test position of the rail 32, a trapezoidal notch 33 having a wider opening is provided.
A wire-shaped spring member 34 having a narrower opening is formed on the rail 3 so as to protrude into the opening of the notch 33.
2 is provided so as to be continuous.

[0008] The operation of the conventional alarm device configured as described above is such that when the circuit breaker body 1 moves, the roller 30 moves from the upper edge of the rail 32 onto the spring member 34. When the roller 30 further moves, the roller 30 is disengaged from the upper edge of the spring member 34 and rapidly rotates clockwise by the action force of the spring 35, and the roller 30 collides with the bottom of the notch 33 and emits a sound.

[0009]

The above-described position notifying device based on sound has a problem that a sufficient volume cannot be obtained because the dimension between the spring member 34 and the bottom of the notch 33 of the rail 32 cannot be increased. there were.

SUMMARY OF THE INVENTION Accordingly, the present invention has an object to realize a drawer-type circuit breaker position notifying device which can notify that the breaker body has reached a test position with a loud sound.

[0011]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is an apparatus for notifying by a sound that a breaker body of a draw-out type circuit breaker has reached a predetermined position. A first lever and a second lever provided on the case body, an operating member for rotating the second lever following movement of the circuit breaker body, and both levers provided between the first lever and the second lever; A spring that urges the rotation, and a collision member that collides when the first lever rotates, wherein when the circuit breaker body reaches the test position, the point of action of the spring on the second lever changes the rotation of the first lever. Moving from one side to the other side with a straight line passing through the center and the point of action of the spring on the first lever as a boundary line, the first lever rotates and collides with the collision member to emit sound.

With such a configuration, when the breaker body is moved in the test position direction, the second lever rotates, and when the test position is reached, the point of action of the spring on the second lever exceeds the boundary line. The stationary first lever starts rotating rapidly by the urging force of the spring, and collides with the collision member by the snap action to generate a larger sound.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a position notification device for a drawer-type circuit breaker according to the present invention will be described with reference to the embodiments shown in FIGS. Note that the configurations of the drawer-type circuit breaker to which the position notification devices of these embodiments are mounted and the position display device for visual observation thereof are substantially the same as those described with reference to FIGS. Therefore, illustration and description thereof are omitted, and components substantially the same as those described in “Prior Art” are denoted by the same reference numerals and described.

A guide plate 50 having a gap with the substrate 11 is provided on the substrate 11 of the alarm device according to the first embodiment of the present invention.
And a second lever 52 having a stepped bent first lever 51 and a bent portion having a U-shaped cross section. Both levers have one arm fitted into the gap between the substrate 11 and the guide plate 50, and have a shaft 53 and a shaft 54, respectively.
Can be rotated about the rotation axis. A tension spring 55 is mounted between the other arms of both levers, and the second lever 52 is urged to rotate counterclockwise.

FIG. 2 shows a main part of this embodiment in a state where the circuit breaker main body is in a disconnection position. In this state, the second lever 5
Reference numeral 2 is in contact with the outer edge near the rotation center of the first lever 51, and the counterclockwise rotation is stopped. The first lever is the first
The rotation in the clockwise direction by the spring 55 is prevented by being in contact with the large diameter portion of the stepped shaft 19 that holds the enlarged lever 20.

When the circuit breaker body is moved from this position in the test position direction, the roller 56 provided on the shaft 22, which is the center of rotation of the second magnifying lever 23, comes into contact with the first engaging edge 52a of the second lever, The second lever 52 rotates clockwise so that both contact points move on the first engagement edge 52a. When the breaker body reaches the test position, the point of action 52b of the spring 55 on the second lever 52 is
5 moves from below to above in FIG. 1 beyond the straight line L passing through the point of action 51 a of FIG. 5 and the rotation center of the first lever 51. Due to this movement, the rotational biasing direction of the first lever 51 by the spring 55 is reversed from the clockwise direction to the counterclockwise direction. As a result, as shown in FIG. 3, the first lever 55 automatically rotates counterclockwise, collides with the large diameter portion of the stepped shaft 17 which is the rotation shaft of the pointer operation lever 15, emits sound, and stops.

Although not shown, when the breaker body is moved from the test position toward the connection position, the contact between the roller 56 and the second lever 52 at the time of exiting the test position becomes the first engagement edge 52a. Moves onto the second engagement edge 52c forming the reverse inclination. Then, the second lever 52 returns and rotates counterclockwise by the action of the spring 55, and the action point 52b of the spring 55 on the second lever 52 moves from above to below the straight line L. By this movement, the first lever 51 automatically rotates clockwise, collides with the large-diameter portion of the stepped shaft 19 that is the center of rotation of the first magnifying lever 20, emits sound, and stops.

Contrary to the above, the contact point between the second lever 52 and the roller 56 moves on the second engagement edge 52c until the breaker body reaches the test position from the connection position in the pull-out operation. The spring 55 on the second lever 52
The point of action 52b moves upward from the lower side beyond the straight line L, and the first lever 51 collides with the stepped shaft 17 to emit a sound. Further moving in the direction of the disconnection position, the contact between the second lever 52 and the roller 56 is moved to the second position when leaving the test position.
The second lever 52 rotates and the action point 52b of the spring 55 moves from the upper side to the lower side beyond the straight line L by moving onto the engaging edge 52a. Then, the first lever 51 is connected to the stepped shaft 19.
Collides with and emits a sound.

As described above, when the breaker body is inserted or pulled out, the fact that the breaker body has reached the test position can be known from the sound generated when the first lever 51 collides with the stepped shaft 17. Can be. Therefore, if the insertion operation or the extraction operation is stopped when the sound is heard, the circuit breaker body is at the test position. When the operation is continued after reaching the test position, the first lever 51 collides with the stepped shaft 19 and emits a second sound when leaving the test position. Therefore, even if the operation is continued, if the operation is stopped before the second sound is emitted, the breaker body can be stopped at the test position.

The same applies to the second embodiment described below. However, the stepped shaft 17 and the stepped shaft 19 also serve as a stopper and a collision member of the first lever 51, and both the shaft and the first lever The collision sound is high and loud because the first member 51 is made of a metal member and the first lever 51 collides with the snap action. However, if necessary, a special collision member may be provided to allow the first lever 51 to move the stepped shaft 17 or the stepped shaft 1.
By hitting the collision member before touching 9, a different sound can be generated.

In the first embodiment, the second lever 52
Are formed so that the second engaging edge 52c and the first engaging edge 52a intersect at an acute angle with a relatively small angle. Due to such a shape of the second lever 52, even when the circuit breaker main body leaves the test position, the first lever 51 can return and rotate to emit a sound.

Next, a second embodiment shown in FIG. 5 will be described. The alerting device of the second embodiment differs from the first embodiment in the shape of the second lever. That is, the second engagement edge 60c of the second lever 60 is formed so as to be substantially parallel to the moving direction of the circuit breaker body when the circuit breaker body moves between the test position and the connection position. With this configuration, when the circuit breaker main body leaves the test position, the second lever 60 does not rotate counterclockwise to return or has a small return rotation, so that the action point 60b of the spring 55 moves the straight line L from above. It does not move downward. For this reason, the first lever 51 remains on the stepped shaft 17 serving as the stopper.

When the circuit breaker body equipped with the alarm device of the second embodiment is pulled out and reaches the test position from the connection position, the contact point between the second lever 60 and the roller 56 is moved from the second engagement edge 60c to the second engagement edge 60c. 1 moves to the engaging edge 60a, the action point 60b of the spring 55 moves down the straight line L from above, and the first lever 51 automatically rotates counterclockwise to collide with the stepped shaft 19 and sound. Emits. That is, when moving from the disconnection position to the connection position and vice versa, the collision sound is emitted only once at the test position. Even in this case, the object of the present invention is achieved.

The embodiment of the present invention has been described above. However, the embodiment of the present invention disclosed above has the following features.
This is merely an example, and the scope of the present invention is not limited to the above embodiment of the present invention. The scope of the present invention is defined by the appended claims, and is intended to include all modifications within the scope and meaning equivalent to the appended claims.

[0025]

The present invention is embodied in the above-described embodiment, and comprises a first lever and a second lever connected by a spring so as to urge each other to rotate, and the second lever follows the movement of the breaker body. When the lever is rotated and the breaker body reaches the test position, the direction in which the first lever is biased to rotate by the spring is reversed, so that the first lever and the collision member collide due to the snap action of the first lever. And emit a sound. As described above, it is possible to know that the circuit breaker main body has reached the test position without adding a simple member and performing an operation while watching the pointer.

[Brief description of the drawings]

FIG. 1 is a plan view showing a main part when a breaker body of a first embodiment of a drawer-type circuit breaker position notification device according to the present invention reaches a test position.

FIG. 2 is a plan view showing a main part when the circuit breaker main body in FIG. 1 is at a disconnection position.

FIG. 3 is a plan view showing a main part when the circuit breaker main body of FIG. 1 is at a test position.

FIG. 4 is a side view showing a main part when the circuit breaker main body of FIG. 1 is at a test position.

FIG. 5 is a plan view showing a main part of a second embodiment according to the present invention.

FIG. 6 is an overall side view of the draw-out type circuit breaker.

FIG. 7 is a plan view showing a visual position display mechanism mounted on the draw-out type circuit breaker of FIG. 6;

FIG. 8 is a side view showing a main part of a conventional sound-based position notification device.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Breaker main body 2 Draw-out frame 10 Position display mechanism 11 Substrate 12 Operating plate 17, 19, 22 Axis 51 First lever (51a Spring action point) 52 Second lever (52a First engagement edge, 52b Spring action point) , 52c second engagement edge) 53, 54 shaft 55 spring 56 roller 60 second lever (60a first engagement edge, 60b spring action point, 60c second engagement edge)

Claims (1)

[Claims] 1. A device for notifying by sound that a breaker main body of a draw-out type circuit breaker has reached a predetermined position, wherein a first lever (51) and a second lever provided on the breaker main body are provided.
A lever (52, 60); an operating member (56) for rotating the second lever (52, 60) following movement of the circuit breaker body; a first lever (51) and a second lever (52); , 60) a spring (55) provided between each other to rotationally bias both levers, and a collision member (17, 19) that collides when the first lever (51) rotates.
When the breaker body reaches the test position, the point of action (52) of the spring (55) on the second lever (52, 60)
b, 60b) are the center of rotation (53) of the first lever (51) and the spring (55) on the first lever (51).
Moving from one side to the other side with the straight line (L) passing through the action point (51a) of the first lever (51a) as a boundary line, and the first lever (51) rotates and collides with the collision member to emit a sound. A position notification device for a drawer-type circuit breaker.