JP3097394B2 - Display for internal accessories of circuit breakers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to interior accessories such as auxiliary switches and alarm switches (hereinafter simply referred to as accessories).
More specifically, the present invention relates to a means for indicating the type and rating of an accessory.

[0002]

2. Description of the Related Art Circuit breakers, such as wiring breakers and earth leakage breakers, include an auxiliary switch for transmitting an on / off state, an alarm switch for transmitting a trip state, and a voltage for receiving a trip command and performing an open circuit operation. Various accessories such as a trip device and an under-voltage trip device for detecting a drop in the main circuit voltage and performing an open circuit operation are mounted. Previously, this accessory was housed in the main case of the circuit breaker, but it was not easy to add or replace accessories because the main body cover had to be opened for attachment and detachment. .

[0003] In view of the above, the present inventors have previously constructed an accessory unit by detachably mounting a plurality of accessories in a cassette on a common base, and detachably attaching the accessory to the cover of the circuit breaker body. A circuit breaker to be mounted was developed (Japanese Patent Application No. 4
-356830). According to such a configuration, accessory units equipped with accessories in a combination according to the specifications can be mounted freely with the main unit cover closed, so it is easy not only during the circuit breaker manufacturing stage but also after the panel is running It is possible to take measures such as adding accessories and changing specifications.

FIG. 8 is a perspective view showing the appearance of such a circuit breaker. In the figure, a cover 1 of a circuit breaker body is shown.
The accessory unit 2 is mounted in a concave portion formed on the left pole side of the cover unit, and a plate-like piece 4 for holding the lead wire 3 of the internal accessory on the side surface of a base (not shown) of the accessory unit 2 facing the side wall opening of the cover 1. Is fitted. The upper surface of the accessory unit 2 attached to the cover 1 is covered with an auxiliary cover 5 attached to the cover 1 so as to be openable and closable. in this case,
The accessory unit 2 can be equipped with two alarm switches and two auxiliary switches, and up to one voltage trip device or undervoltage trip device. These accessories can be combined in an appropriate combination according to the specifications. Mounted on the base. On the side surface of the case 6 of the circuit breaker main body, nameplates 7 to 9 (hereinafter, K is an alarm switch, W is an auxiliary switch, and F is an Voltage trip device, R shall represent undervoltage trip device).

[0005]

In the above-described circuit breaker, the type and rating nameplate of the accessory is conventionally attached to the side surface of the main body case. Therefore, there were the following problems. (1) Since the nameplate and the accessory unit are separate, there is a great danger that the accessory unit will be installed by mistake in correspondence between the indication on the side of the case and the combination of accessories. (2) When adding accessories or changing the type or rating due to specification changes, it is necessary to attach or replace the nameplate on the side of the case at the same time, which is troublesome. In particular, such work is often performed at the customer's site after the operation of the board, so that it is unnecessary and troublesome, and the above-mentioned mistakes are likely to occur. SUMMARY OF THE INVENTION It is an object of the present invention to provide an interior accessory display device for a circuit breaker in which a display error is less likely to occur and a specification change is easy.

[0006]

SUMMARY OF THE INVENTION The present invention achieves the above object by providing the type and rating of the interior accessory on the surface of a piece fitted into the base of the accessory unit to hold down the lead wire of the interior accessory. Shall be achieved. If the pieces are divided into a plurality of segments, the work of fitting them into the base is simplified. In this case, if the shapes of these segments fitted to the base are different from each other, the fitting to the base will not be mistaken.

[0007]

According to the present invention, by displaying the type and rating of the accessory on the surface of the lead wire holding piece exposed from the side wall opening of the cover, the display is integrated with the accessory unit. As a result, there is less correspondence error between the display and the actual accessory compared to the case where the display is applied to the accessory unit and a separate case, and the display is attached to the accessory unit itself, If an accessory unit is added or replaced, the display is also added or replaced at the same time, so that another work for display is not required. In particular, since the accessory unit which has been displayed on the maker side is provided to the customer, no error occurs even when the specification is changed after the operation of the board.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Note that the same reference numerals are used for the portions corresponding to the conventional example. FIG. 1 is a perspective view showing a state in which an accessory unit is mounted on a circuit breaker, and FIG. 2 is a perspective view showing a state in which the mounting is completed. Accessory unit 2
The auxiliary cover 5 is opened as shown in FIG. 1 and is mounted on the concave portion 10 of the cover 1 from above, and the auxiliary cover 5 is closed as shown in FIG. The piece 4 that holds the lead wire 3 is the front and rear 2
Divided into two segments 4A and 4B, a nameplate 7 for K is stuck on the surface of the segment 4A on the front (power supply side), and a nameplate 8 for W and F on the surface of the segment 4B on the rear (load side). 9 is pasted.

FIG. 3 is an enlarged plan view of the accessory unit 2 mounted on the cover 1, FIG. 4 is a plan view of an auxiliary cover 4 attached to the cover 1, and FIG. 5 is a plan view showing the accessory unit 2 alone. Figures and 6 show the base 1 of the accessory unit 2.
1 is a plan view, and FIG. 7 is a side view thereof. The base 11 of the resin molded product shown in FIG. 6 and FIG.
And a recess 13 for mounting the W are provided at two places before and after each other, and a recess 14 for mounting the F or R is provided beside them. In addition, on the rectangular side wall 11a of the base 11,
The K lead wire accommodating groove 15, the R lead wire accommodating groove 16 and the F (R) lead wire accommodating groove 17 are formed in two, two and one, respectively, and a dovetail groove for fitting the piece 4 further. 18 are formed in three lines. Here, the interval between the dovetail grooves 18 is larger between the central portion and the rear portion (right side in the drawing) than between the central portion and the front portion (left side in the drawing).

FIG. 5 shows a case where the alarm switch 19, the auxiliary switch 20, and the voltage trip device 21 are inserted into all the recesses 12 to 14 of the base 11, and the lead wires 3 are accommodated in the respective grooves 15 to 17. The figure shows a state where the piece 4 is pressed by the piece 4 fitted into the groove 18 via the projection 4a.
Each of the accessories 19 to 21 is gripped by a hook 11b (FIG. 6) formed integrally with the base 11. Accessory unit 2 inserted into recess 10 (FIG. 1) of cover 1
Is held by hooking two hooks 11c at the front and rear at a step (not shown) of the cover 1. An opening 22 (FIG. 1) is formed in the side wall 1a of the cover 1 so that the base unit side wall 11a of the accessory unit 2 attached to the cover 1 is fitted into the opening 22. The auxiliary cover 5 shown in FIG. 4 has a protruding shaft 5a fitted into the bearing hole 1b shown in FIG. 1 and is attached to the cover 1 so as to be openable and closable. You.

The K attached to the segment 4A of the piece 4
The nameplate 7 has two alarm switches 19 in the illustrated example.
Each type and rating are displayed separately on the left and right. The same applies to the W nameplate 8 affixed to the segment 4B. The type and rating of the voltage trip device 21 are displayed on the F nameplate 9 attached to the segment 4B.
When an undervoltage trip device is inserted into the segment 4, an R nameplate is attached to the segment 4B. Instead of pasting the nameplates 7-9, stamp and stamp,
It is also possible to form characters and figures integrally with the piece 4.

As shown in FIG. 5, the front and rear two segments 4A and 4B abut each other in the central dovetail groove 18; The distance before and after the projection 4a is large. The piece 4 is easier to fit into the base 11 when it is divided than when it is integrally formed. In this case, the base 4 of the segments 4A and 4B is used as shown in FIG.
If the fitting shapes (intervals of the projections 4a in this example) are different from each other, it will not be possible to replace the front and rear sides and fit into the base 11, so that the display error due to the misplacement will be eliminated.

[0013]

As described above, according to the present invention, the type of the interior accessory is provided on the surface of the piece fitted into the base of the accessory unit to hold down the lead wire of the interior accessory.
By giving rating indications, interior accessories and their types and rating indications are integrated, reducing the mistake of correspondence between interior accessories and indications, and also displaying each time when adding interior accessories or changing specifications There is no need to add or change the components.The advantage of the circuit breaker is that the internal accessories can be unitized and attached to the cover, so that it is possible to easily add internal accessories and change specifications at any time. Is further utilized.

[Brief description of the drawings]

FIG. 1 is a perspective view showing how an accessory unit is mounted on a circuit breaker according to an embodiment of the present invention.

FIG. 2 is a perspective view of the circuit breaker of FIG. 1 in which attachment of an accessory unit is completed.

FIG. 3 is an enlarged plan view showing an accessory unit mounting portion in FIG. 2 with an auxiliary cover removed.

FIG. 4 is an enlarged plan view of an auxiliary cover in FIG. 2;

FIG. 5 is a plan view showing the accessory unit in FIG. 3 alone;

FIG. 6 is a plan view of a base in FIG. 5;

FIG. 7 is a side view of FIG. 6;

FIG. 8 is a perspective view of a circuit breaker showing a conventional example.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 cover 1a cover side wall 2 accessory unit 3 lead wire 4 piece 6 case 7 alarm switch name plate 8 auxiliary switch name plate 9 voltage trip device name plate 11 base 11a base side wall 22 cover side wall opening

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-97341 (JP, A) JP-A-59-86643 (JP, U) JP-A-1-177854 (JP, U) (58) Survey Field (Int.Cl. ⁷ , DB name) H01H 73/06 H01H 73/02 H01H 73/12

Claims (2)

(57) [Claims] An accessory unit having a plurality of cassette-mounted interior accessories removably mounted on a common base is removably mounted on a cover of a circuit breaker body, and a side wall opening of the cover. A circuit breaker in which a plate-shaped piece for holding the lead wire of the interior accessory is fitted on a side wall of the base facing the base, wherein the type and rating of the interior accessory are provided on the surface of the piece. Interior accessories display device. 2. A piece is divided into a plurality of segments, each of which is provided with a type and rating indication of an interior accessory, and each of which has a different fitting shape with respect to a base. An interior accessory display device for the circuit breaker described.