JPH0632729Y2 - Draw-out circuit breaker - Google Patents

Description

[Detailed Description of the Invention] [Industrial application] The present invention relates to a circuit breaker housed in a switchboard (hereinafter abbreviated as circuit breaker) having a rear side handle provided on the rear side thereof. .

[Prior Art] As a conventional example of this type, a circuit breaker as shown in a side view of a partial cross section of FIG. 5 is generally known. That is,
A circuit breaker 8 having wheels 6 that roll on the storage surface 4 of the switchboard 2 while being guided in the traveling direction is stored in the switchboard 2. A handle 10 is provided on the front surface of the circuit breaker 8 and a plurality of movable main circuit disconnecting contacts 12 (hereinafter referred to as movable), which are a total of 6 on the rear surface, including a plurality of normally three-phase AC input sides and three output sides. Side contact 12
Is described) is provided. When the circuit breaker 8 is housed in the switchboard 2, the same number of six fixed-side main circuit disconnecting contacts 14 (hereinafter, fixed-side contact 14 are engaged with and brought into contact with the movable-side contacts 12). Is described) is provided. Circuit breaker 8
If the movable contacts 12 are housed in the switchboard 2, the movable contacts 12 engage with the fixed contacts 14 and the contactors 12 and 14 are released when the breaker 8 is pulled out. Has become.

It is generally not possible to visually check the contact state of the contacts 12 and 14 with the breaker 8 accommodated therein because of the structure of the switchboard 2 and the breaker 8. Therefore, the positional dimensions of the fixed side contactor 14 and the movable side contactor 12 are always strictly controlled using jigs and tools.

[Problems to be solved by the invention]

However, such a circuit breaker 8 is provided with a moving handle 10 on the front surface thereof, but is not provided on the rear surface side where the movable side contact 12 is provided. For this reason, when transporting the circuit breaker 8 as a unit or pulling it out from the switchboard 2 for inspection, the movable side contact 12 is held in place of the handle at the time of handling, and the movable side is moved by an excessive force at that time. When the contactor 12 is deformed and the circuit breaker 8 is accommodated in the switchboard 2 while keeping it as it is, as shown in the side view of the partial cross section of FIG. The contactor 12 cannot make a regular contact and is displaced, and this state can only be detected by manual adjustment when the breaker 8 is stored. There is a problem that abnormal heat generation or even burnout occurs due to a defect.

In order to solve the above-mentioned problems, the present invention provides a handle on the back side of the circuit breaker 8 and uses this handle when handling the load of the circuit breaker 8 to prevent the movable contact 12 from being deformed. The purpose is to provide a vessel.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention provides a drawer type circuit breaker which is freely accommodated in a switchboard and which is opened and closed to open and close the main circuit of the switchboard. A rear handle should be provided on the rear side.

[Action]

According to the present invention, a rear side handle is provided on the rear side where the movable side contactor of the circuit breaker is provided, and the rear side handle is used when handling the circuit breaker after pulling out the handle from the switchboard.
This is to prevent the use of the movable contactor instead of the handle inadvertently for transporting and carrying the circuit breaker. Since the movable contact will not be deformed because an excessive force is not applied, when storing the circuit breaker in the switchboard,
Since the movable side contact and the fixed side contact can be properly contacted with each other without causing positional displacement, it is possible to prevent abnormal heat generation due to poor contact or even a situation of burning. In addition, the handling of the circuit breaker after it is pulled out is easy to handle, and even if a foreign object should collide from above the movable contact, the back handle will collide with it first. As a result, it is possible to protect the movable contact from the first collision of foreign matter.

〔Example〕

FIG. 1 is a side view showing a first embodiment of the present invention.
In FIG. 1, the difference from FIG. 5 showing the above-mentioned conventional example is that a back side handle 16 is provided on the back side of the circuit breaker 8 provided with the movable side contact 12, and other points are shown. The points are the same. That is, the circuit breaker 8 having the wheels 6 that roll on the storage surface 4 of the switchboard 2 while being guided in the traveling direction is the switchboard 2.
It is stored in. A handle 10 is provided on the front surface of the circuit breaker 8 and a plurality of movable contacts 12 are provided on the rear surface thereof, which are a plurality of generally three three-phase AC input sides and three output sides. When the circuit breaker 8 is housed in the switchboard 2, the same number of six fixed-side contacts 14 that the movable-side contacts 12 are engaged with and brought into contact with are provided. If the circuit breaker 8 is housed in the switchboard 2, these movable contacts 12 are fixed side contacts 14.
If the circuit breaker 8 is pulled out, the contactors 12, 1
The contact of 4 is released.

It is generally not possible to visually check the contact state of the contacts 12 and 14 with the breaker 8 accommodated therein because of the structure of the switchboard 2 and the breaker 8. Therefore, the positional dimensions of the fixed side contactor 14 and the movable side contactor 12 are always strictly controlled using jigs and tools.

In the present invention, a back side handle 16 is provided on the back side of the circuit breaker 8. The first embodiment of the present invention shown in FIG. 1 is constructed as shown in the perspective view of FIG. 2 when the circuit breaker 8 is pulled out. That is, a handle 10 is provided on the front surface of the circuit breaker 8 as in the conventional example, and a rear surface provided with a plurality of movable contacts 12 is formed in a U shape and both ends thereof are fixed to the circuit breaker 8. The rear handle 16 is provided, and the structure is simple and sturdy.

FIG. 3 is a partial side view showing a second embodiment of the present invention,
FIG. 4 is a sectional view of the main part of FIG. The circuit breaker 8 has a U-shaped rear side handle 18 having a pair of parallel portions movably supported in the direction of arrow 24 by slide bearings 20 and 22, respectively. The rear handle 18 is provided with V-shaped grooves 26 and 28 at predetermined positions, and the slide bearing 2
A ball stop 30 is provided in the 0, and the groove 2
The balls pushed out by the springs of the ball stop 30 are fitted into 6, 28, so that the movement of the rear side handle 18 is stopped at a predetermined position. FIG. 4 shows a state in which the ball stop 30 is in contact with the groove 26 and the rear side handle 18 is pulled out to the right and stopped. When the rear handle 18 is pushed leftward from this state into the circuit breaker 8, the ball stop 30 comes into contact with the groove 28.
Explaining the above with reference to FIG. 3, the rear side handle 18
When is pulled out to the position of 18a on the right side, the groove 26 and the ball stop 30 come into contact with each other and are snapped at this position, and in this state, as a handle for moving and transporting, and the movable contact 12
Can be used as a guard to protect the circuit breaker from collision, and when it has been used as a handle, it is pushed to the left into the circuit breaker 8 and the ball stop 30 comes into contact with the groove 28 and snaps into place.
The rear handle 18 does not get in the way of storing the power supply in the switchboard 2. If a V-shaped groove is further provided at a predetermined position between the grooves 26 and 28, the rear side handle 18 can be provided at a larger number of predetermined positions.
You can stop it. By doing this, for example, when using the rear side handle 18 as a handle, pull it out a little to stabilize the handling, or use it with a small bending moment acting on the handle itself, and when using it as a guard, fill it up fully. When it is pulled out, the range for protecting the movable side contact 12 can be made larger than that in the first embodiment of the present invention in which the rear side handle 16 is provided with a constant size.

Since the present invention is configured as described above, it is possible to prevent the movable side contact 12 from being held in place of the handle, and the rear side handles 16 and 18 serve as guards to protect the movable side contact 12. It is possible to prevent collision of foreign matter.

[Effect of device]

According to the present invention, a fixed-type or pull-out type rear side handle is provided on the rear side where the movable contact of the circuit breaker is provided. Therefore, when handling the circuit breaker after pulling this handle from the switchboard, By using it, it is possible to prevent the movable side contactor from being inadvertently used instead of the handle. Further, the rear handle can be used as a guard to prevent foreign matter from colliding with the movable contact. Since the movable contact is not deformed because excessive force is not applied, when the circuit breaker is stored in the switchboard, the movable contact and the fixed contact will not be displaced and the normal contact will not occur. Therefore, it is possible to prevent abnormal heat generation due to poor contact and further prevent the occurrence of burnout. Furthermore, it is possible to provide a circuit breaker that does not deform the movable-side contactor and that has excellent operability in moving and transporting the circuit breaker after it is pulled out.

[Brief description of drawings]

FIG. 1 is a side view showing a first embodiment of the present invention, FIG. 2 is a perspective view of a circuit breaker according to the first embodiment of the present invention when it is pulled out from a switchboard, and FIG. 3 is a perspective view of the present invention. 2 is a partial side view showing an embodiment of FIG. 2, FIG. 4 is a sectional view of a main part of FIG.
FIG. 5 is a side view of a partial cross section showing a conventional example, and FIG. 6 is a conventional example in a state in which the movable side contact is deformed and can no longer make regular contact with the fixed side contact, causing a positional deviation. It is a side view of the partial cross section shown. 2 …… Switchboard, 8 …… Drawer type circuit breaker (circuit breaker), 12 ……
Movable side main circuit disconnecting contactor (moving side contactor), 14 …… Fixed side main circuit disconnecting contactor (fixed side contactor), 16,18 …… Rear side handle, 20,22 …… Slide bearing, 30… … Ball stop.

Claims (2)

[Scope of utility model registration request] 1. A drawer type circuit breaker, which can be stored and drawn freely in a switchboard to open and close a main circuit of the switchboard, is provided with a rear side handle on a rear side where a movable side main circuit disconnecting contact is provided. Draw-out type circuit breaker characterized by that. 2. A drawer type circuit breaker according to claim 1 of the utility model registration, characterized in that a rear side handle which is movable in a substantially horizontal direction and which is retractable and pushable is provided in an outer box thereof. .