KR20020090886A - Attached terminal board of circuit breaker - Google Patents

Abstract

PURPOSE: To improve the mounting structure of an ancillary terminal block mounted on a circuit breaker so that the terminal block can be mounted on the side of the case of a breaker body in a simple single operation. CONSTITUTION: The ancillary terminal block is mounted on the side of a breaker case 1 for connecting appurtenances installed inside the beaker body, such as auxiliary switches, to an external signal line. A pair of 'dovetail grooves' 3b is formed on the front and rear of the side wall surface of a breaker case cover 3 having an auxiliary cover 10, respectively, and a pair of projected 'dovetails' 14a corresponding to the 'dovetail grooves' is formed on the interior wall surface of the ancillary terminal block, wherein the 'dovetails' are fitted into the 'dovetail grooves' from above the case to mount the ancillary terminal block on the side of the beaker case. Further, a recessed groove 3c for drawing out a lead wire is formed on the side of the beaker case cover, and a coming-off preventive projection 14b is provided on the auxiliary terminal block in the position corresponding to that of the recessed groove. While the ancillary terminal block is mounted on the breaker case, the coming-off preventive projection is pressed down from above with the auxiliary cover.

Description

ATTACHED TERMINAL BOARD OF CIRCUIT BREAKER}

The present invention is intended for a circuit breaker such as an auto breaker, an earth leakage breaker, etc., and is provided on the side of the breaker case, and an accessory terminal block for connecting an external signal line with a lead wire of an accessory device such as an auxiliary switch or an alarm switch built in the breaker body. It relates to an attachment structure.

(Conventional technology)

First, the outline of the structure of the accessory terminal block which connects the lead breaker of the circuit breaker and its accessories which are the object of implementation of this invention as an example of the autobreaker described at the beginning is shown to FIG. 4, FIG. In Fig. 4, reference numeral 1 denotes a circuit breaker case which is a resin molded article combining the case 2 and the cover 3, 4 is a fixed contact unit integrated with a power supply terminal, 5 is a movable contactor, 6 is an open / close mechanism, and 7 is an operation. A handle, 8 is an overcurrent trip device, 9 is a load side terminal, and the cover 3 has an accessory switch which is described later as an internal accessory (optional) left and right. A pocket-shaped recess 3a to be arranged and stored is partitioned, and an auxiliary cover 10 as an opening / closing lid is provided on the upper surface of the recess 3a.

Here, the cover 3 of the circuit breaker case 1 draws out the operation handle 7 from the upper surface of the convex part of the center, and the said recessed part 3a is the area | region of the power supply terminal side adjacent to the center convex part. It is partitioned on. Further, the auxiliary cover 10 is composed of one open / close lid whose both ends are hinged to the bearing portion of the cover 3, and the lid portion is L-shaped in cross section as shown in the figure, so that the cross section on its standing side is The cover 3 is screwed into the closed position in contact with the convex wall surface of the cover 3.

In Fig. 5, reference numeral 11 denotes an auxiliary switch as an auxiliary switch (in conjunction with the movable contactor 5 of the circuit breaker, the on-off state of the main circuit contact is taken out as an electrical signal), and 12 is an alarm switch (circuit breaker). 13 is the lead wire of the switches 11 and 12, and when the auxiliary switch is equipped with the breaker main body, the auxiliary cover 10 is placed at the dashed line position in FIG. After opening, the auxiliary switch 11 and the alarm switch 12 are arranged left and right as shown in FIG. 5 and inserted into the recessed portion 3a partitioned by the cover 3 of the circuit breaker case 1. . In addition, although the lead wire 13 of each attached switch may be pulled out to the side of the circuit breaker case 1, and may be connected to an external signal line as it is, normally, the attached terminal block which connects the lead wire 13 and an external signal line (optional product) (14) is prepared, and the attached terminal block 14 is mounted on the side of the breaker case 1 so as to wire external signal lines.

Here, in the related art, a hook-type attachment sheet in which the accessory terminal block 14 is screwed to the side surface of the circuit breaker case 1 using a fixing screw or protruded to the inner surface side of the accessory terminal block 14 is connected to the circuit breaker case 1. Is sandwiched between the case 2 and the cover 3 of the "

By the way, in the conventional attachment structure of the said accessory terminal block, there exists a problem as described below in the handling surface.

In other words, the optional terminal switch and the accessory terminal block can be easily installed without the burden on the user in consideration of the case where the user additionally equips the circuit breaker with the distribution panel. . In this regard, in the conventional attachment structure, when attaching the accessory terminal block to the circuit breaker main body, troublesome labor such as screwing or removing the cover of the circuit breaker case once and then attaching it is required.

The present invention has been made in view of the above points, and the attachment structure is improved so that it can be mounted on the side of the case of the breaker body by simple one-touch operation without any troublesome work such as screwing or removing the cover of the breaker case. It is an object of the present invention to provide an accessory terminal block of a circuit breaker aimed at improving serviceability.

(Means to solve the task)

In order to achieve the above object, according to the present invention, it is attached to the side of the breaker case consisting of a case and a cover as an accessory terminal block for connecting an external signal line and accessories such as auxiliary switches, alarm switches, etc. built in the breaker body; An accessory terminal block of a circuit breaker having a recess in which the cover contains an accessory and an auxiliary cover covering an upper surface of the recess,

A pair of front and rear dovetail grooves are formed on the cover side wall of the circuit breaker case, a dovetail corresponding to the dovetail groove is formed on the inner wall of the accessory terminal block, and the dovetail is formed in the dovetail groove from the top of the case. And insert the terminal block into the side of the breaker case (claim 1).

Further, according to the present invention, in addition to the above-described configuration, a fall prevention protrusion is provided on the inner surface side of the accessory terminal block in correspondence with the recessed groove for drawing out the lead wire formed on the cover side of the breaker case in order to hold the accessory terminal block so as not to come off from the mounting position. Then, with the attached terminal block attached to the circuit breaker case, the release preventing projection is configured to be pushed from above by the auxiliary cover and held at the mounting position (claim 2).

In the above configuration, when attaching the accessory device (supplied switch, alarm switch, etc.) and the accessory terminal block for connecting the grid line and the external signal line to the circuit breaker body, the lead wire of the accessory device is connected to the terminal of the accessory terminal block in advance. With the auxiliary cover of the case open, the accessory is inserted into the recess of the case cover from above.

Moreover, the accessory terminal block fits the dovetail which protruded in the inner surface side into the dovetail groove formed in the side wall surface of the case cover. Then, by returning the auxiliary cover to the closed position and screwing, the accessory and the accessory terminal block are simultaneously held in their respective mounting positions.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an external perspective view showing a state before mounting an accessory terminal block according to an embodiment of the present invention to a circuit breaker.

Fig. 2 is a structural diagram of an accessory terminal block in Fig. 1, wherein (a) to (c) are side views, plan views, and cross-sectional views, respectively.

3 is a state diagram in which the accessory terminal block of FIG. 2 is attached to a circuit breaker case of a circuit breaker, and (a) to (c) are plan views, side views, and sectional views of some notches, respectively.

4 is a cross-sectional view of a circuit breaker to which an accessory terminal block is applied.

5 is a partial plan view of a circuit breaker shown with the accessory and the accessory terminal block.

(Explanation of symbols for the main parts of the drawing)

1: breaker case 2: case

3: Cover 3a: Concave for storing accessory

3b: dovetail groove 3c: concave groove

10: auxiliary cover 11: auxiliary switch (accessory)

12: alarm switch (accessory) 13: lead wire

14: accessory terminal block 14a: dovetail

14b: fall prevention protrusion 14c: Nagadanza

15: Fixing screw of auxiliary cover

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described based on the Example shown to FIGS. 1-3. In addition, in drawing of an Example, the same code | symbol is attached | subjected to the same member corresponding to FIGS. 4 and 5, and the description is abbreviate | omitted.

That is, in the illustrated embodiment, the dovetail grooves 3b having a cross-section dove tail shape are formed in the vertical direction on the left and right wall surfaces of the cover 3 with respect to the circuit breaker case 1, and are further assisted. On the outer side of the recess 3a, which is located in the cover 10 and stores the accessory, an up-and-down recessed recess 3c is formed in which the lead wire 13 (see FIG. 5) of the accessory is drawn out of the case. . On the other hand, on the inner wall surface side of the accessory terminal block 14 attached to the side of the circuit breaker case 1, the dovetail 14a of cross section dove tail shape corresponding to the said dovetail groove 3b and the recessed groove 3c, respectively, and a fall prevention is provided. The protrusion 14b is formed. In addition, the accessory terminal block 14 has a hollow structure, and connects the lead wire of the accessory device introduced therein to the screw terminal 14c through an opening opened to the inner wall surface side thereof.

With such a configuration, when the auxiliary switch 11 and the auxiliary switch 11 shown in Fig. 5 and the accessory terminal block 14 connected to the lead wire 13 of the accessory switch are equipped in the main body of the circuit breaker, the following description will be given. Mount it in the work order as shown below.

First, as a preparatory work, the lead wire 13 of the auxiliary switch 11 and the alarm switch 12 is connected to the screw terminal 14c of the attached terminal block 14. As shown in FIG. Subsequently, the auxiliary cover 10 of the breaker case 1 is opened, and the auxiliary switch 11 and the alarm switch 12 are inserted into the recessed portion 3a of the cover 3 from above and set.

Next, the dovetails 14a and the release preventing protrusions 14b of the accessory terminal block 14 are respectively formed on the side surfaces of the cover 3 so as to attach the accessory terminal block 14 to the side surfaces of the breaker case 1. It fits in the groove | channel 3b and the recessed groove | channel 3c (refer FIG. 1). Thereby, as shown to FIG.3 (a)-(c), the accessory terminal block 14 is caught by the side surface of the breaker case 1, and is mounted. Finally, when the auxiliary cover 10 is returned to the closed position and fastened to the case cover 3 with the fixing screw 15, the auxiliary cover 10 is superimposed on the fall prevention protrusion 14b and the attached terminal block 14 ) Into the mounting position so that it does not come out. In this way, the auxiliary switch 11, the alarm switch 12, and the accessory terminal block 14 are simultaneously held in their respective mounting positions.

In addition, when detaching an accessory and an accessory terminal block from a circuit breaker main body, it shall separate in the reverse order to the above.

As described above, according to the configuration of the present invention, a pair of front and rear dovetail grooves are formed on the cover side wall surface of the circuit breaker case, and a dovetail corresponding to the dovetail groove is formed on the inner wall surface of the accessory terminal block, and the dovetail is described above. Insert the terminal block into the dovetail groove from the top of the case so that the accessory terminal block is mounted on the side of the circuit breaker case, and the release prevention projection is provided on the inner surface side of the accessory terminal block, and the attachment prevention terminal is attached to the circuit breaker case. By pushing from the top by the auxiliary cover and holding in the mounting position,

As in the conventional attachment structure, the dovetail of the accessory terminal block is not required without any troublesome operations such as screwing the accessory terminal block to the side of the circuit breaker case or removing the cover of the circuit breaker case and inserting and fixing it with the case. The accessory terminal block can be mounted on the main body side of the circuit breaker by simply attaching it to the dovetail groove on the side of the breaker case and then closing the auxiliary cover.

Claims (2)

An accessory terminal block mounted on the side of a circuit breaker case formed of a case and a cover to connect an accessory built into the circuit breaker body and an external signal line, wherein the cover contains a recess and an upper surface of the recess. In the terminal block of the circuit breaker provided with an auxiliary cover to cover, A pair of front and rear dovetail grooves are formed on the cover side wall surface of the circuit breaker case, a convex shape dovetail corresponding to the dovetail groove is formed on the inner wall surface of the accessory terminal block, and the dovetail is formed on the dovetail groove. An accessory terminal block for a circuit breaker, wherein the accessory terminal block is inserted from above the case so as to be mounted on the side of the breaker case. The method of claim 1, In response to the recessed groove for lead wire drawing formed on the cover side of the breaker case, a fall prevention projection is provided on the inner surface side of the attached terminal block, and the fall prevention projection is placed upward by an auxiliary cover. The terminal block of the circuit breaker which was pushed in and held in the mounting position.