JPH0110843Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a circuit/disconnector in which a closure jacket is formed from a molded insulator cover and a molded insulator container, and in particular, a terminal barrier is inserted and coupled to the end of the closure jacket. This is an improvement that shortens the insertion stroke.

In conventional circuit breakers and disconnectors of this type, prevention of insulation deterioration between different polarity terminals in the connection terminal section of the external conductor, and prevention of different phase short circuits or arcs between different polarity terminals due to falling foreign matter or breakage. For the purpose of preventing short circuits, this type of circuit breaker is equipped with a terminal barrier, but the conventional one is a closure consisting of a molded insulating cover and a molded insulating container. A vertical groove for attaching a terminal barrier between the opposite terminals at the end of the jacket is provided across the molded insulator cover and the molded insulator base, and this vertical groove is made of a soft material such as rubber or synthetic resin. A type of terminal barrier is used in which one end of the terminal barrier is inserted through the upper opening of the molded insulator cover and extends over the molded insulator base.

However, in circuit breakers and disconnectors formed in this way, it is necessary to fit the bottom of one edge of the terminal barrier through the upper opening of the molded insulator cover and insert it along the vertical groove to the bottom of the molded insulator base. This has the drawback that the insertion stroke of the terminal barrier becomes long, making it difficult to insert the terminal barrier.Also, the molded insulator cover and molded insulator base are formed separately, and the molded insulator cover is attached to the molded insulator cover mounting hole. By inserting the mounting screw into the molded insulator base and tightening it with the tap washer provided on the molded insulator base side, the mounting screw can be integrated with the molded insulator base by adjusting the clearance between the molded insulator cover mounting hole and the mounting screw. Due to misalignment of the tightening position of the molded insulator cover and molding dimensional errors between the molded insulator cover and the molded insulator base, the vertical groove for attaching the terminal barrier provided at the end of the closure jacket may not match the vertical groove of the molded insulator cover. The vertical grooves of the insulator base may not align linearly and may be slightly misaligned, so when attaching the terminal barrier after connecting the external conductor, the molded insulator base should be opened from the top opening of the molded insulator cover. If the terminal barrier is inserted with a long insertion stroke, it becomes difficult to insert the terminal barrier midway through, and the molded insulator cover and molded insulator must be inserted in such a way that the vertical grooves of the molded insulator cover and molded insulator base match exactly. There is a drawback that it is necessary to correct the deviation between the object base and the tightening position, and to carry out rework.

Therefore, it is an object of this invention to provide a terminal barrier for circuits and disconnectors that eliminates the above-mentioned conventional drawbacks and allows smooth and easy installation of the terminal barrier even when an external conductor is connected. It is something.

According to this invention, the terminal barrier of the circuit breaker of this invention includes a closure jacket formed of a molded insulator cover and a molded insulation base, and a terminal barrier between opposite terminals at the end of the closure jacket. In a circuit board or disconnector, which has a longitudinal groove with an engagement enlarged part provided on the outer wall, and a terminal barrier in the form of a quadrilateral plate made of a soft material, one side of which is inserted into and connected to the longitudinal groove, the molded insulator cover and An enlarged insertion opening is provided in a part of the vertical groove of the molded insulator base to be joined near the joining surface, and is divided into one end and the middle part of the insertion side of the terminal barrier to engage with the engagement expansion part of the vertical groove. Engagement protrusions to be engaged are provided respectively,
The insertion stroke of the closure jacket of the terminal barrier into the longitudinal groove is shortened.

The above objects and other objects and features of the present invention will become more apparent from the following detailed description with reference to the drawings.

Figures 1 and 2 of the drawings show an embodiment of a three-pole type circuit breaker in which this invention is implemented, and the closing jacket of the circuit breaker body is composed of a molded insulator cover 1. In combination with the molded insulator base 2, at least a pair of contacts of each pole are movable relative to each other to open and close within the closure envelope, excluding the external connecting conductor terminals 3; It houses an opening/closing mechanism for opening and closing, a releasable device for opening the contact via the opening/closing mechanism, and a tripping device that responds to an overload current to release the releasable device.

The molded insulator cover 1 is provided with a molded insulator cover mounting hole 4, which is tightened with a tap washer provided on the molded insulator container 2 side using a mounting screw 5, thereby attaching the molded insulator cover 1 to the molded insulator cover 1. Together with the insulator base 2, a closing envelope of the circuit or disconnector is formed. External connection conductor terminals 3 are led out from inside the closure envelope to terminal shelves 6 provided on the side of the molded insulator base 2 at both ends of the closure envelope, and connection terminals 8 of the outer conductor 7 are connected to the conductor terminals 3. Connected.

As shown in FIG. 3, partition walls 1a of a molded insulator cover 1 are provided at both ends of the closing jacket of the circuit and disconnector body to separate the external connection conductor terminals 3 of each pole.
1b, 1c, 1d and partition wall 2 of molded insulator base 2
a, 2b, 2c, and 2d are respectively combined to form a storage groove for the external connection conductor terminal 3 at the end of the closed jacket, and the partition walls 1b, 2b serve as insulating partitions between the above-mentioned different terminals. A vertical groove 9 having an enlarged engaging portion 9a is provided on the outer end surface of the partition walls 1c, 2c, extending from the molded insulator cover 1 to the molded insulator base 2, which is joined to the molded insulator cover 1. An enlarged insertion opening 10 is formed at the joint of the two vertical grooves 9.

A terminal barrier 11 is made in a plate shape from a soft insulating material such as rubber or synthetic resin, and has an engaging protrusion 11a on one side thereof that is inserted into and engages with the longitudinal groove 9 of the molded insulator cover 1, and a molded insulator base. The longitudinal groove 9 of No. 2 and the engagement protrusion 11b that are inserted and engaged are divided to form the longitudinal groove 9.
and having a partial length that partially engages the insertion stroke to determine the insertion stroke.

As mentioned above, this invention is based on the molded insulator cover 1.
and a molded insulator base 2, a vertical groove 9 with an engaging enlarged portion 9a provided in the insulating partition between the opposite terminals at the end of the closure jacket, A molded insulator base 2 to be joined to a molded insulator cover 1 in a device comprising a terminal barrier made of a soft material whose one end is inserted into the groove 9 and coupled to the molded insulator cover 1.
An enlarged insertion opening 10 is provided at the junction of the vertical grooves 9 of the terminal barrier 11, and an engaging protrusion 11a is inserted into and engaged with the vertical groove 9 of the molded insulator cover 1.
and an engaging protrusion 11b that is inserted into and engaged with the longitudinal groove 9 of the molded insulator base 2, thereby shortening the insertion stroke of the terminal barrier 11. In the normal installation of the terminal barrier 11, the engaging protrusion 11a corresponds to the upper part of the molded insulator cover 1 so that it can be inserted into the vertical groove 9, and the engaging protrusion 11b corresponds to the enlarged insertion opening 10 provided on the molded insulator base 2. The terminal barrier 11 is attached to the longitudinal groove 9 by inserting the respective engaging protrusions 11a and 11b into the longitudinal groove 9 and sliding them toward the bottom of the molded insulation base 2. Therefore,
The insertion stroke only requires the length of the engaging protrusion 11a or 11b, compared to the conventional method in which the bottom of one end of the terminal barrier is inserted into the vertical groove from the top of the molded insulator cover until it reaches the top of the terminal barrier. , the insertion stroke is shortened, making it easier to install the terminal barrier, and the installation space in front of the molded insulator cover that is larger than the insertion stroke of the terminal barrier is required, but this installation space can be small, and Even if the longitudinal grooves 9 of the molded insulator cover 1 and the molded insulator base 2 do not match and there is some misalignment, the terminal barrier 11 will not fit into the enlarged insertion opening 10.
It is bent in the space margin of the molded insulator base, and is smoothly inserted into the vertical groove 9 on the molded insulator base side without resistance, so there is no need to correct the deviation in the tightening position of the molded insulator cover 1 and the molded insulator base 2, etc. This produces the following effects.

Furthermore, as shown in FIG. 2, even when the circuit breaker main body is attached to the mounting member 13 within the fixed panel 12 and the external conductor 7 is connected, the circuit breaker main body is attached to the fixed panel 12 and the circuit breaker If there is a slight gap g between the main body and the front surface of the end of the closing jacket, the terminal barrier 1 made of a soft material as shown in FIG.
Attachment is possible by bending the upper end engaging protrusion 11a of 1, inserting the engaging protrusion 11b into the enlarged insertion opening 10, and sliding it into the vertical groove 9.
Note that even if there is no gap at all between the fixed panel 12 and the front end of the closing jacket of the circuit or disconnector body,
Insert the engagement protrusion 11a at the upper end of the terminal barrier 11 into the longitudinal groove 9 through the enlarged insertion opening 10 and slide it to the upper part of the closure jacket, and then insert the engagement protrusion 11b into the longitudinal groove on the side of the molded record container 2. It can also be installed by inserting it.

As described above, in this invention, it is advantageous to attach the terminal barrier to the circuit or disconnector body by shortening the insertion stroke of the terminal barrier.

[Brief explanation of the drawing]

1 and 2 are a front view and a side view showing an embodiment of this invention, FIG. 3 is an exploded perspective view of the main part of the embodiment, and FIG. 4 is a perspective view of the main part showing the terminal barrier installed state, FIG. 5 is an explanatory diagram of the case where the upper end of the terminal barrier is bent and attached. In the figure, 1... Molded insulator cover, 1a, 1b, 1c,
2a, 2b, 2c...Partition wall, 2...Molded insulator base, 6...Terminal shelf, 9...Vertical groove, 9a...Enlarged engagement portion, 10...Enlarged socket, 11...Terminal barrier , 11a, 11b... Engaging protrusion.

Claims (1)

[Claims for Utility Model Registration] A closure jacket formed by combining a molded insulator cover 1 and a molded insulator base 2 which are divided into upper and lower parts so as to join together, and a storage provided at an end of the closure jacket. A terminal shelf 6 of a multi-pole external connection conductor terminal 3 formed by a groove, and insulating partition walls 1b, 2b of the adjacent terminal shelf 6,
1c, 2c have engagement enlarged portions 9a on the outer end surfaces thereof, and a vertical groove 9 provided between the molded insulator cover 1 and the molded insulator base 2, and the vertical groove 9 connected to the molded insulator cover 1. an enlarged insertion port 10 partially provided on the joint surface side of the molded insulator base 2; and an engaging protrusion 11a partially provided from the upper end of one side of a quadrilateral plate shape made of a soft material. and a terminal barrier 11 having an engaging protrusion 11b partially provided at an intermediate position on one side, wherein the engaging protrusion 11a of the terminal barrier 11 is connected to the longitudinal groove 11 of the molded insulator cover 1. At the same time, the engaging protrusions 11b are inserted into the enlarged insertion openings 10 provided in the molded insulator base 2, and the respective engaging protrusions 11a and 11b are inserted into the vertical grooves 9.
terminal barrier 11 by sliding it into the terminal barrier 11.
A terminal barrier for a circuit switch or disconnector, characterized in that it is removably attached.